1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * thinkpad_acpi.c - ThinkPad ACPI Extras
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 */
8
9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10
11 #define TPACPI_VERSION "0.26"
12 #define TPACPI_SYSFS_VERSION 0x030000
13
14 /*
15 * Changelog:
16 * 2007-10-20 changelog trimmed down
17 *
18 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
19 * drivers/misc.
20 *
21 * 2006-11-22 0.13 new maintainer
22 * changelog now lives in git commit history, and will
23 * not be updated further in-file.
24 *
25 * 2005-03-17 0.11 support for 600e, 770x
26 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
27 *
28 * 2005-01-16 0.9 use MODULE_VERSION
29 * thanks to Henrik Brix Andersen <brix@gentoo.org>
30 * fix parameter passing on module loading
31 * thanks to Rusty Russell <rusty@rustcorp.com.au>
32 * thanks to Jim Radford <radford@blackbean.org>
33 * 2004-11-08 0.8 fix init error case, don't return from a macro
34 * thanks to Chris Wright <chrisw@osdl.org>
35 */
36
37 #include <linux/kernel.h>
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/types.h>
41 #include <linux/string.h>
42 #include <linux/list.h>
43 #include <linux/mutex.h>
44 #include <linux/sched.h>
45 #include <linux/sched/signal.h>
46 #include <linux/kthread.h>
47 #include <linux/freezer.h>
48 #include <linux/delay.h>
49 #include <linux/slab.h>
50 #include <linux/nvram.h>
51 #include <linux/proc_fs.h>
52 #include <linux/seq_file.h>
53 #include <linux/sysfs.h>
54 #include <linux/backlight.h>
55 #include <linux/bitops.h>
56 #include <linux/fb.h>
57 #include <linux/platform_device.h>
58 #include <linux/hwmon.h>
59 #include <linux/hwmon-sysfs.h>
60 #include <linux/input.h>
61 #include <linux/leds.h>
62 #include <linux/rfkill.h>
63 #include <linux/dmi.h>
64 #include <linux/jiffies.h>
65 #include <linux/workqueue.h>
66 #include <linux/acpi.h>
67 #include <linux/pci.h>
68 #include <linux/power_supply.h>
69 #include <sound/core.h>
70 #include <sound/control.h>
71 #include <sound/initval.h>
72 #include <linux/uaccess.h>
73 #include <acpi/battery.h>
74 #include <acpi/video.h>
75
76 /* ThinkPad CMOS commands */
77 #define TP_CMOS_VOLUME_DOWN 0
78 #define TP_CMOS_VOLUME_UP 1
79 #define TP_CMOS_VOLUME_MUTE 2
80 #define TP_CMOS_BRIGHTNESS_UP 4
81 #define TP_CMOS_BRIGHTNESS_DOWN 5
82 #define TP_CMOS_THINKLIGHT_ON 12
83 #define TP_CMOS_THINKLIGHT_OFF 13
84
85 /* NVRAM Addresses */
86 enum tp_nvram_addr {
87 TP_NVRAM_ADDR_HK2 = 0x57,
88 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
89 TP_NVRAM_ADDR_VIDEO = 0x59,
90 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
91 TP_NVRAM_ADDR_MIXER = 0x60,
92 };
93
94 /* NVRAM bit masks */
95 enum {
96 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
97 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
98 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
99 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
100 TP_NVRAM_MASK_THINKLIGHT = 0x10,
101 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
102 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
103 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
104 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
105 TP_NVRAM_MASK_MUTE = 0x40,
106 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
107 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
108 TP_NVRAM_POS_LEVEL_VOLUME = 0,
109 };
110
111 /* Misc NVRAM-related */
112 enum {
113 TP_NVRAM_LEVEL_VOLUME_MAX = 14,
114 };
115
116 /* ACPI HIDs */
117 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068"
118 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068"
119 #define TPACPI_ACPI_LENOVO_HKEY_V2_HID "LEN0268"
120 #define TPACPI_ACPI_EC_HID "PNP0C09"
121
122 /* Input IDs */
123 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
124 #define TPACPI_HKEY_INPUT_VERSION 0x4101
125
126 /* ACPI \WGSV commands */
127 enum {
128 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
129 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
130 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
131 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
132 };
133
134 /* TP_ACPI_WGSV_GET_STATE bits */
135 enum {
136 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
137 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
138 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
139 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
140 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
141 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
142 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
143 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
144 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
145 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
146 };
147
148 /* HKEY events */
149 enum tpacpi_hkey_event_t {
150 /* Hotkey-related */
151 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */
152 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */
153 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */
154 TP_HKEY_EV_KBD_LIGHT = 0x1012, /* Thinklight/kbd backlight */
155 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */
156 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */
157 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */
158
159 /* Reasons for waking up from S3/S4 */
160 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */
161 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */
162 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */
163 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */
164 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */
165 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */
166
167 /* Auto-sleep after eject request */
168 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */
169 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */
170
171 /* Misc bay events */
172 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */
173 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock
174 or port replicator */
175 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug
176 dock or port replicator */
177
178 /* User-interface events */
179 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
180 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */
181 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */
182 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */
183 TP_HKEY_EV_TABLET_CHANGED = 0x60c0, /* X1 Yoga (2016):
184 * enter/leave tablet mode
185 */
186 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */
187 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */
188 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */
189
190 /* Key-related user-interface events */
191 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */
192 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */
193 TP_HKEY_EV_KEY_FN_ESC = 0x6060, /* Fn+Esc key pressed X240 */
194
195 /* Thermal events */
196 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */
197 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */
198 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */
199 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */
200 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* windows; thermal table changed */
201 TP_HKEY_EV_THM_CSM_COMPLETED = 0x6032, /* windows; thermal control set
202 * command completed. Related to
203 * AML DYTC */
204 TP_HKEY_EV_THM_TRANSFM_CHANGED = 0x60F0, /* windows; thermal transformation
205 * changed. Related to AML GMTS */
206
207 /* AC-related events */
208 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */
209
210 /* Further user-interface events */
211 TP_HKEY_EV_PALM_DETECTED = 0x60b0, /* palm hoveres keyboard */
212 TP_HKEY_EV_PALM_UNDETECTED = 0x60b1, /* palm removed */
213
214 /* Misc */
215 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */
216 };
217
218 /****************************************************************************
219 * Main driver
220 */
221
222 #define TPACPI_NAME "thinkpad"
223 #define TPACPI_DESC "ThinkPad ACPI Extras"
224 #define TPACPI_FILE TPACPI_NAME "_acpi"
225 #define TPACPI_URL "http://ibm-acpi.sf.net/"
226 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
227
228 #define TPACPI_PROC_DIR "ibm"
229 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
230 #define TPACPI_DRVR_NAME TPACPI_FILE
231 #define TPACPI_DRVR_SHORTNAME "tpacpi"
232 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
233
234 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
235 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
236
237 #define TPACPI_MAX_ACPI_ARGS 3
238
239 /* Debugging printk groups */
240 #define TPACPI_DBG_ALL 0xffff
241 #define TPACPI_DBG_DISCLOSETASK 0x8000
242 #define TPACPI_DBG_INIT 0x0001
243 #define TPACPI_DBG_EXIT 0x0002
244 #define TPACPI_DBG_RFKILL 0x0004
245 #define TPACPI_DBG_HKEY 0x0008
246 #define TPACPI_DBG_FAN 0x0010
247 #define TPACPI_DBG_BRGHT 0x0020
248 #define TPACPI_DBG_MIXER 0x0040
249
250 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
251 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
252 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
253
254
255 /****************************************************************************
256 * Driver-wide structs and misc. variables
257 */
258
259 struct ibm_struct;
260
261 struct tp_acpi_drv_struct {
262 const struct acpi_device_id *hid;
263 struct acpi_driver *driver;
264
265 void (*notify) (struct ibm_struct *, u32);
266 acpi_handle *handle;
267 u32 type;
268 struct acpi_device *device;
269 };
270
271 struct ibm_struct {
272 char *name;
273
274 int (*read) (struct seq_file *);
275 int (*write) (char *);
276 void (*exit) (void);
277 void (*resume) (void);
278 void (*suspend) (void);
279 void (*shutdown) (void);
280
281 struct list_head all_drivers;
282
283 struct tp_acpi_drv_struct *acpi;
284
285 struct {
286 u8 acpi_driver_registered:1;
287 u8 acpi_notify_installed:1;
288 u8 proc_created:1;
289 u8 init_called:1;
290 u8 experimental:1;
291 } flags;
292 };
293
294 struct ibm_init_struct {
295 char param[32];
296
297 int (*init) (struct ibm_init_struct *);
298 umode_t base_procfs_mode;
299 struct ibm_struct *data;
300 };
301
302 static struct {
303 u32 bluetooth:1;
304 u32 hotkey:1;
305 u32 hotkey_mask:1;
306 u32 hotkey_wlsw:1;
307 enum {
308 TP_HOTKEY_TABLET_NONE = 0,
309 TP_HOTKEY_TABLET_USES_MHKG,
310 TP_HOTKEY_TABLET_USES_GMMS,
311 } hotkey_tablet;
312 u32 kbdlight:1;
313 u32 light:1;
314 u32 light_status:1;
315 u32 bright_acpimode:1;
316 u32 bright_unkfw:1;
317 u32 wan:1;
318 u32 uwb:1;
319 u32 fan_ctrl_status_undef:1;
320 u32 second_fan:1;
321 u32 second_fan_ctl:1;
322 u32 beep_needs_two_args:1;
323 u32 mixer_no_level_control:1;
324 u32 battery_force_primary:1;
325 u32 input_device_registered:1;
326 u32 platform_drv_registered:1;
327 u32 platform_drv_attrs_registered:1;
328 u32 sensors_pdrv_registered:1;
329 u32 sensors_pdrv_attrs_registered:1;
330 u32 sensors_pdev_attrs_registered:1;
331 u32 hotkey_poll_active:1;
332 u32 has_adaptive_kbd:1;
333 } tp_features;
334
335 static struct {
336 u16 hotkey_mask_ff:1;
337 u16 volume_ctrl_forbidden:1;
338 } tp_warned;
339
340 struct thinkpad_id_data {
341 unsigned int vendor; /* ThinkPad vendor:
342 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
343
344 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
345 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
346
347 u32 bios_model; /* 1Y = 0x3159, 0 = unknown */
348 u32 ec_model;
349 u16 bios_release; /* 1ZETK1WW = 0x4b31, 0 = unknown */
350 u16 ec_release;
351
352 char *model_str; /* ThinkPad T43 */
353 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
354 };
355 static struct thinkpad_id_data thinkpad_id;
356
357 static enum {
358 TPACPI_LIFE_INIT = 0,
359 TPACPI_LIFE_RUNNING,
360 TPACPI_LIFE_EXITING,
361 } tpacpi_lifecycle;
362
363 static int experimental;
364 static u32 dbg_level;
365
366 static struct workqueue_struct *tpacpi_wq;
367
368 enum led_status_t {
369 TPACPI_LED_OFF = 0,
370 TPACPI_LED_ON,
371 TPACPI_LED_BLINK,
372 };
373
374 /* tpacpi LED class */
375 struct tpacpi_led_classdev {
376 struct led_classdev led_classdev;
377 int led;
378 };
379
380 /* brightness level capabilities */
381 static unsigned int bright_maxlvl; /* 0 = unknown */
382
383 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
384 static int dbg_wlswemul;
385 static bool tpacpi_wlsw_emulstate;
386 static int dbg_bluetoothemul;
387 static bool tpacpi_bluetooth_emulstate;
388 static int dbg_wwanemul;
389 static bool tpacpi_wwan_emulstate;
390 static int dbg_uwbemul;
391 static bool tpacpi_uwb_emulstate;
392 #endif
393
394
395 /*************************************************************************
396 * Debugging helpers
397 */
398
399 #define dbg_printk(a_dbg_level, format, arg...) \
400 do { \
401 if (dbg_level & (a_dbg_level)) \
402 printk(KERN_DEBUG pr_fmt("%s: " format), \
403 __func__, ##arg); \
404 } while (0)
405
406 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
407 #define vdbg_printk dbg_printk
408 static const char *str_supported(int is_supported);
409 #else
str_supported(int is_supported)410 static inline const char *str_supported(int is_supported) { return ""; }
411 #define vdbg_printk(a_dbg_level, format, arg...) \
412 do { if (0) no_printk(format, ##arg); } while (0)
413 #endif
414
tpacpi_log_usertask(const char * const what)415 static void tpacpi_log_usertask(const char * const what)
416 {
417 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
418 what, task_tgid_vnr(current));
419 }
420
421 #define tpacpi_disclose_usertask(what, format, arg...) \
422 do { \
423 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \
424 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
425 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \
426 what, task_tgid_vnr(current), ## arg); \
427 } \
428 } while (0)
429
430 /*
431 * Quirk handling helpers
432 *
433 * ThinkPad IDs and versions seen in the field so far are
434 * two or three characters from the set [0-9A-Z], i.e. base 36.
435 *
436 * We use values well outside that range as specials.
437 */
438
439 #define TPACPI_MATCH_ANY 0xffffffffU
440 #define TPACPI_MATCH_ANY_VERSION 0xffffU
441 #define TPACPI_MATCH_UNKNOWN 0U
442
443 /* TPID('1', 'Y') == 0x3159 */
444 #define TPID(__c1, __c2) (((__c1) << 8) | (__c2))
445 #define TPID3(__c1, __c2, __c3) (((__c1) << 16) | ((__c2) << 8) | (__c3))
446 #define TPVER TPID
447
448 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
449 { .vendor = PCI_VENDOR_ID_IBM, \
450 .bios = TPID(__id1, __id2), \
451 .ec = TPACPI_MATCH_ANY, \
452 .quirks = (__quirk) }
453
454 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
455 { .vendor = PCI_VENDOR_ID_LENOVO, \
456 .bios = TPID(__id1, __id2), \
457 .ec = TPACPI_MATCH_ANY, \
458 .quirks = (__quirk) }
459
460 #define TPACPI_Q_LNV3(__id1, __id2, __id3, __quirk) \
461 { .vendor = PCI_VENDOR_ID_LENOVO, \
462 .bios = TPID3(__id1, __id2, __id3), \
463 .ec = TPACPI_MATCH_ANY, \
464 .quirks = (__quirk) }
465
466 #define TPACPI_QEC_IBM(__id1, __id2, __quirk) \
467 { .vendor = PCI_VENDOR_ID_IBM, \
468 .bios = TPACPI_MATCH_ANY, \
469 .ec = TPID(__id1, __id2), \
470 .quirks = (__quirk) }
471
472 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \
473 { .vendor = PCI_VENDOR_ID_LENOVO, \
474 .bios = TPACPI_MATCH_ANY, \
475 .ec = TPID(__id1, __id2), \
476 .quirks = (__quirk) }
477
478 struct tpacpi_quirk {
479 unsigned int vendor;
480 u32 bios;
481 u32 ec;
482 unsigned long quirks;
483 };
484
485 /**
486 * tpacpi_check_quirks() - search BIOS/EC version on a list
487 * @qlist: array of &struct tpacpi_quirk
488 * @qlist_size: number of elements in @qlist
489 *
490 * Iterates over a quirks list until one is found that matches the
491 * ThinkPad's vendor, BIOS and EC model.
492 *
493 * Returns 0 if nothing matches, otherwise returns the quirks field of
494 * the matching &struct tpacpi_quirk entry.
495 *
496 * The match criteria is: vendor, ec and bios much match.
497 */
tpacpi_check_quirks(const struct tpacpi_quirk * qlist,unsigned int qlist_size)498 static unsigned long __init tpacpi_check_quirks(
499 const struct tpacpi_quirk *qlist,
500 unsigned int qlist_size)
501 {
502 while (qlist_size) {
503 if ((qlist->vendor == thinkpad_id.vendor ||
504 qlist->vendor == TPACPI_MATCH_ANY) &&
505 (qlist->bios == thinkpad_id.bios_model ||
506 qlist->bios == TPACPI_MATCH_ANY) &&
507 (qlist->ec == thinkpad_id.ec_model ||
508 qlist->ec == TPACPI_MATCH_ANY))
509 return qlist->quirks;
510
511 qlist_size--;
512 qlist++;
513 }
514 return 0;
515 }
516
tpacpi_is_lenovo(void)517 static inline bool __pure __init tpacpi_is_lenovo(void)
518 {
519 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
520 }
521
tpacpi_is_ibm(void)522 static inline bool __pure __init tpacpi_is_ibm(void)
523 {
524 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
525 }
526
527 /****************************************************************************
528 ****************************************************************************
529 *
530 * ACPI Helpers and device model
531 *
532 ****************************************************************************
533 ****************************************************************************/
534
535 /*************************************************************************
536 * ACPI basic handles
537 */
538
539 static acpi_handle root_handle;
540 static acpi_handle ec_handle;
541
542 #define TPACPI_HANDLE(object, parent, paths...) \
543 static acpi_handle object##_handle; \
544 static const acpi_handle * const object##_parent __initconst = \
545 &parent##_handle; \
546 static char *object##_paths[] __initdata = { paths }
547
548 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
549 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
550
551 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
552 /* T4x, X31, X40 */
553 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
554 "\\CMS", /* R40, R40e */
555 ); /* all others */
556
557 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
558 "^HKEY", /* R30, R31 */
559 "HKEY", /* all others */
560 ); /* 570 */
561
562 /*************************************************************************
563 * ACPI helpers
564 */
565
acpi_evalf(acpi_handle handle,int * res,char * method,char * fmt,...)566 static int acpi_evalf(acpi_handle handle,
567 int *res, char *method, char *fmt, ...)
568 {
569 char *fmt0 = fmt;
570 struct acpi_object_list params;
571 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
572 struct acpi_buffer result, *resultp;
573 union acpi_object out_obj;
574 acpi_status status;
575 va_list ap;
576 char res_type;
577 int success;
578 int quiet;
579
580 if (!*fmt) {
581 pr_err("acpi_evalf() called with empty format\n");
582 return 0;
583 }
584
585 if (*fmt == 'q') {
586 quiet = 1;
587 fmt++;
588 } else
589 quiet = 0;
590
591 res_type = *(fmt++);
592
593 params.count = 0;
594 params.pointer = &in_objs[0];
595
596 va_start(ap, fmt);
597 while (*fmt) {
598 char c = *(fmt++);
599 switch (c) {
600 case 'd': /* int */
601 in_objs[params.count].integer.value = va_arg(ap, int);
602 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
603 break;
604 /* add more types as needed */
605 default:
606 pr_err("acpi_evalf() called with invalid format character '%c'\n",
607 c);
608 va_end(ap);
609 return 0;
610 }
611 }
612 va_end(ap);
613
614 if (res_type != 'v') {
615 result.length = sizeof(out_obj);
616 result.pointer = &out_obj;
617 resultp = &result;
618 } else
619 resultp = NULL;
620
621 status = acpi_evaluate_object(handle, method, ¶ms, resultp);
622
623 switch (res_type) {
624 case 'd': /* int */
625 success = (status == AE_OK &&
626 out_obj.type == ACPI_TYPE_INTEGER);
627 if (success && res)
628 *res = out_obj.integer.value;
629 break;
630 case 'v': /* void */
631 success = status == AE_OK;
632 break;
633 /* add more types as needed */
634 default:
635 pr_err("acpi_evalf() called with invalid format character '%c'\n",
636 res_type);
637 return 0;
638 }
639
640 if (!success && !quiet)
641 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
642 method, fmt0, acpi_format_exception(status));
643
644 return success;
645 }
646
acpi_ec_read(int i,u8 * p)647 static int acpi_ec_read(int i, u8 *p)
648 {
649 int v;
650
651 if (ecrd_handle) {
652 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
653 return 0;
654 *p = v;
655 } else {
656 if (ec_read(i, p) < 0)
657 return 0;
658 }
659
660 return 1;
661 }
662
acpi_ec_write(int i,u8 v)663 static int acpi_ec_write(int i, u8 v)
664 {
665 if (ecwr_handle) {
666 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
667 return 0;
668 } else {
669 if (ec_write(i, v) < 0)
670 return 0;
671 }
672
673 return 1;
674 }
675
issue_thinkpad_cmos_command(int cmos_cmd)676 static int issue_thinkpad_cmos_command(int cmos_cmd)
677 {
678 if (!cmos_handle)
679 return -ENXIO;
680
681 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
682 return -EIO;
683
684 return 0;
685 }
686
687 /*************************************************************************
688 * ACPI device model
689 */
690
691 #define TPACPI_ACPIHANDLE_INIT(object) \
692 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
693 object##_paths, ARRAY_SIZE(object##_paths))
694
drv_acpi_handle_init(const char * name,acpi_handle * handle,const acpi_handle parent,char ** paths,const int num_paths)695 static void __init drv_acpi_handle_init(const char *name,
696 acpi_handle *handle, const acpi_handle parent,
697 char **paths, const int num_paths)
698 {
699 int i;
700 acpi_status status;
701
702 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
703 name);
704
705 for (i = 0; i < num_paths; i++) {
706 status = acpi_get_handle(parent, paths[i], handle);
707 if (ACPI_SUCCESS(status)) {
708 dbg_printk(TPACPI_DBG_INIT,
709 "Found ACPI handle %s for %s\n",
710 paths[i], name);
711 return;
712 }
713 }
714
715 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
716 name);
717 *handle = NULL;
718 }
719
tpacpi_acpi_handle_locate_callback(acpi_handle handle,u32 level,void * context,void ** return_value)720 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
721 u32 level, void *context, void **return_value)
722 {
723 struct acpi_device *dev;
724 if (!strcmp(context, "video")) {
725 if (acpi_bus_get_device(handle, &dev))
726 return AE_OK;
727 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev)))
728 return AE_OK;
729 }
730
731 *(acpi_handle *)return_value = handle;
732
733 return AE_CTRL_TERMINATE;
734 }
735
tpacpi_acpi_handle_locate(const char * name,const char * hid,acpi_handle * handle)736 static void __init tpacpi_acpi_handle_locate(const char *name,
737 const char *hid,
738 acpi_handle *handle)
739 {
740 acpi_status status;
741 acpi_handle device_found;
742
743 BUG_ON(!name || !handle);
744 vdbg_printk(TPACPI_DBG_INIT,
745 "trying to locate ACPI handle for %s, using HID %s\n",
746 name, hid ? hid : "NULL");
747
748 memset(&device_found, 0, sizeof(device_found));
749 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
750 (void *)name, &device_found);
751
752 *handle = NULL;
753
754 if (ACPI_SUCCESS(status)) {
755 *handle = device_found;
756 dbg_printk(TPACPI_DBG_INIT,
757 "Found ACPI handle for %s\n", name);
758 } else {
759 vdbg_printk(TPACPI_DBG_INIT,
760 "Could not locate an ACPI handle for %s: %s\n",
761 name, acpi_format_exception(status));
762 }
763 }
764
dispatch_acpi_notify(acpi_handle handle,u32 event,void * data)765 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
766 {
767 struct ibm_struct *ibm = data;
768
769 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
770 return;
771
772 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
773 return;
774
775 ibm->acpi->notify(ibm, event);
776 }
777
setup_acpi_notify(struct ibm_struct * ibm)778 static int __init setup_acpi_notify(struct ibm_struct *ibm)
779 {
780 acpi_status status;
781 int rc;
782
783 BUG_ON(!ibm->acpi);
784
785 if (!*ibm->acpi->handle)
786 return 0;
787
788 vdbg_printk(TPACPI_DBG_INIT,
789 "setting up ACPI notify for %s\n", ibm->name);
790
791 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
792 if (rc < 0) {
793 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
794 return -ENODEV;
795 }
796
797 ibm->acpi->device->driver_data = ibm;
798 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
799 TPACPI_ACPI_EVENT_PREFIX,
800 ibm->name);
801
802 status = acpi_install_notify_handler(*ibm->acpi->handle,
803 ibm->acpi->type, dispatch_acpi_notify, ibm);
804 if (ACPI_FAILURE(status)) {
805 if (status == AE_ALREADY_EXISTS) {
806 pr_notice("another device driver is already handling %s events\n",
807 ibm->name);
808 } else {
809 pr_err("acpi_install_notify_handler(%s) failed: %s\n",
810 ibm->name, acpi_format_exception(status));
811 }
812 return -ENODEV;
813 }
814 ibm->flags.acpi_notify_installed = 1;
815 return 0;
816 }
817
tpacpi_device_add(struct acpi_device * device)818 static int __init tpacpi_device_add(struct acpi_device *device)
819 {
820 return 0;
821 }
822
register_tpacpi_subdriver(struct ibm_struct * ibm)823 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
824 {
825 int rc;
826
827 dbg_printk(TPACPI_DBG_INIT,
828 "registering %s as an ACPI driver\n", ibm->name);
829
830 BUG_ON(!ibm->acpi);
831
832 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
833 if (!ibm->acpi->driver) {
834 pr_err("failed to allocate memory for ibm->acpi->driver\n");
835 return -ENOMEM;
836 }
837
838 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
839 ibm->acpi->driver->ids = ibm->acpi->hid;
840
841 ibm->acpi->driver->ops.add = &tpacpi_device_add;
842
843 rc = acpi_bus_register_driver(ibm->acpi->driver);
844 if (rc < 0) {
845 pr_err("acpi_bus_register_driver(%s) failed: %d\n",
846 ibm->name, rc);
847 kfree(ibm->acpi->driver);
848 ibm->acpi->driver = NULL;
849 } else if (!rc)
850 ibm->flags.acpi_driver_registered = 1;
851
852 return rc;
853 }
854
855
856 /****************************************************************************
857 ****************************************************************************
858 *
859 * Procfs Helpers
860 *
861 ****************************************************************************
862 ****************************************************************************/
863
dispatch_proc_show(struct seq_file * m,void * v)864 static int dispatch_proc_show(struct seq_file *m, void *v)
865 {
866 struct ibm_struct *ibm = m->private;
867
868 if (!ibm || !ibm->read)
869 return -EINVAL;
870 return ibm->read(m);
871 }
872
dispatch_proc_open(struct inode * inode,struct file * file)873 static int dispatch_proc_open(struct inode *inode, struct file *file)
874 {
875 return single_open(file, dispatch_proc_show, PDE_DATA(inode));
876 }
877
dispatch_proc_write(struct file * file,const char __user * userbuf,size_t count,loff_t * pos)878 static ssize_t dispatch_proc_write(struct file *file,
879 const char __user *userbuf,
880 size_t count, loff_t *pos)
881 {
882 struct ibm_struct *ibm = PDE_DATA(file_inode(file));
883 char *kernbuf;
884 int ret;
885
886 if (!ibm || !ibm->write)
887 return -EINVAL;
888 if (count > PAGE_SIZE - 1)
889 return -EINVAL;
890
891 kernbuf = kmalloc(count + 1, GFP_KERNEL);
892 if (!kernbuf)
893 return -ENOMEM;
894
895 if (copy_from_user(kernbuf, userbuf, count)) {
896 kfree(kernbuf);
897 return -EFAULT;
898 }
899
900 kernbuf[count] = 0;
901 ret = ibm->write(kernbuf);
902 if (ret == 0)
903 ret = count;
904
905 kfree(kernbuf);
906
907 return ret;
908 }
909
910 static const struct proc_ops dispatch_proc_ops = {
911 .proc_open = dispatch_proc_open,
912 .proc_read = seq_read,
913 .proc_lseek = seq_lseek,
914 .proc_release = single_release,
915 .proc_write = dispatch_proc_write,
916 };
917
918 /****************************************************************************
919 ****************************************************************************
920 *
921 * Device model: input, hwmon and platform
922 *
923 ****************************************************************************
924 ****************************************************************************/
925
926 static struct platform_device *tpacpi_pdev;
927 static struct platform_device *tpacpi_sensors_pdev;
928 static struct device *tpacpi_hwmon;
929 static struct input_dev *tpacpi_inputdev;
930 static struct mutex tpacpi_inputdev_send_mutex;
931 static LIST_HEAD(tpacpi_all_drivers);
932
933 #ifdef CONFIG_PM_SLEEP
tpacpi_suspend_handler(struct device * dev)934 static int tpacpi_suspend_handler(struct device *dev)
935 {
936 struct ibm_struct *ibm, *itmp;
937
938 list_for_each_entry_safe(ibm, itmp,
939 &tpacpi_all_drivers,
940 all_drivers) {
941 if (ibm->suspend)
942 (ibm->suspend)();
943 }
944
945 return 0;
946 }
947
tpacpi_resume_handler(struct device * dev)948 static int tpacpi_resume_handler(struct device *dev)
949 {
950 struct ibm_struct *ibm, *itmp;
951
952 list_for_each_entry_safe(ibm, itmp,
953 &tpacpi_all_drivers,
954 all_drivers) {
955 if (ibm->resume)
956 (ibm->resume)();
957 }
958
959 return 0;
960 }
961 #endif
962
963 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
964 tpacpi_suspend_handler, tpacpi_resume_handler);
965
tpacpi_shutdown_handler(struct platform_device * pdev)966 static void tpacpi_shutdown_handler(struct platform_device *pdev)
967 {
968 struct ibm_struct *ibm, *itmp;
969
970 list_for_each_entry_safe(ibm, itmp,
971 &tpacpi_all_drivers,
972 all_drivers) {
973 if (ibm->shutdown)
974 (ibm->shutdown)();
975 }
976 }
977
978 static struct platform_driver tpacpi_pdriver = {
979 .driver = {
980 .name = TPACPI_DRVR_NAME,
981 .pm = &tpacpi_pm,
982 },
983 .shutdown = tpacpi_shutdown_handler,
984 };
985
986 static struct platform_driver tpacpi_hwmon_pdriver = {
987 .driver = {
988 .name = TPACPI_HWMON_DRVR_NAME,
989 },
990 };
991
992 /*************************************************************************
993 * sysfs support helpers
994 */
995
996 struct attribute_set {
997 unsigned int members, max_members;
998 struct attribute_group group;
999 };
1000
1001 struct attribute_set_obj {
1002 struct attribute_set s;
1003 struct attribute *a;
1004 } __attribute__((packed));
1005
create_attr_set(unsigned int max_members,const char * name)1006 static struct attribute_set *create_attr_set(unsigned int max_members,
1007 const char *name)
1008 {
1009 struct attribute_set_obj *sobj;
1010
1011 if (max_members == 0)
1012 return NULL;
1013
1014 /* Allocates space for implicit NULL at the end too */
1015 sobj = kzalloc(sizeof(struct attribute_set_obj) +
1016 max_members * sizeof(struct attribute *),
1017 GFP_KERNEL);
1018 if (!sobj)
1019 return NULL;
1020 sobj->s.max_members = max_members;
1021 sobj->s.group.attrs = &sobj->a;
1022 sobj->s.group.name = name;
1023
1024 return &sobj->s;
1025 }
1026
1027 #define destroy_attr_set(_set) \
1028 kfree(_set);
1029
1030 /* not multi-threaded safe, use it in a single thread per set */
add_to_attr_set(struct attribute_set * s,struct attribute * attr)1031 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1032 {
1033 if (!s || !attr)
1034 return -EINVAL;
1035
1036 if (s->members >= s->max_members)
1037 return -ENOMEM;
1038
1039 s->group.attrs[s->members] = attr;
1040 s->members++;
1041
1042 return 0;
1043 }
1044
add_many_to_attr_set(struct attribute_set * s,struct attribute ** attr,unsigned int count)1045 static int add_many_to_attr_set(struct attribute_set *s,
1046 struct attribute **attr,
1047 unsigned int count)
1048 {
1049 int i, res;
1050
1051 for (i = 0; i < count; i++) {
1052 res = add_to_attr_set(s, attr[i]);
1053 if (res)
1054 return res;
1055 }
1056
1057 return 0;
1058 }
1059
delete_attr_set(struct attribute_set * s,struct kobject * kobj)1060 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1061 {
1062 sysfs_remove_group(kobj, &s->group);
1063 destroy_attr_set(s);
1064 }
1065
1066 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1067 sysfs_create_group(_kobj, &_attr_set->group)
1068
parse_strtoul(const char * buf,unsigned long max,unsigned long * value)1069 static int parse_strtoul(const char *buf,
1070 unsigned long max, unsigned long *value)
1071 {
1072 char *endp;
1073
1074 *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1075 endp = skip_spaces(endp);
1076 if (*endp || *value > max)
1077 return -EINVAL;
1078
1079 return 0;
1080 }
1081
tpacpi_disable_brightness_delay(void)1082 static void tpacpi_disable_brightness_delay(void)
1083 {
1084 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1085 pr_notice("ACPI backlight control delay disabled\n");
1086 }
1087
printk_deprecated_attribute(const char * const what,const char * const details)1088 static void printk_deprecated_attribute(const char * const what,
1089 const char * const details)
1090 {
1091 tpacpi_log_usertask("deprecated sysfs attribute");
1092 pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n",
1093 what, details);
1094 }
1095
1096 /*************************************************************************
1097 * rfkill and radio control support helpers
1098 */
1099
1100 /*
1101 * ThinkPad-ACPI firmware handling model:
1102 *
1103 * WLSW (master wireless switch) is event-driven, and is common to all
1104 * firmware-controlled radios. It cannot be controlled, just monitored,
1105 * as expected. It overrides all radio state in firmware
1106 *
1107 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1108 * (TODO: verify how WLSW interacts with the returned radio state).
1109 *
1110 * The only time there are shadow radio state changes, is when
1111 * masked-off hotkeys are used.
1112 */
1113
1114 /*
1115 * Internal driver API for radio state:
1116 *
1117 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1118 * bool: true means radio blocked (off)
1119 */
1120 enum tpacpi_rfkill_state {
1121 TPACPI_RFK_RADIO_OFF = 0,
1122 TPACPI_RFK_RADIO_ON
1123 };
1124
1125 /* rfkill switches */
1126 enum tpacpi_rfk_id {
1127 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1128 TPACPI_RFK_WWAN_SW_ID,
1129 TPACPI_RFK_UWB_SW_ID,
1130 TPACPI_RFK_SW_MAX
1131 };
1132
1133 static const char *tpacpi_rfkill_names[] = {
1134 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1135 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1136 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1137 [TPACPI_RFK_SW_MAX] = NULL
1138 };
1139
1140 /* ThinkPad-ACPI rfkill subdriver */
1141 struct tpacpi_rfk {
1142 struct rfkill *rfkill;
1143 enum tpacpi_rfk_id id;
1144 const struct tpacpi_rfk_ops *ops;
1145 };
1146
1147 struct tpacpi_rfk_ops {
1148 /* firmware interface */
1149 int (*get_status)(void);
1150 int (*set_status)(const enum tpacpi_rfkill_state);
1151 };
1152
1153 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1154
1155 /* Query FW and update rfkill sw state for a given rfkill switch */
tpacpi_rfk_update_swstate(const struct tpacpi_rfk * tp_rfk)1156 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1157 {
1158 int status;
1159
1160 if (!tp_rfk)
1161 return -ENODEV;
1162
1163 status = (tp_rfk->ops->get_status)();
1164 if (status < 0)
1165 return status;
1166
1167 rfkill_set_sw_state(tp_rfk->rfkill,
1168 (status == TPACPI_RFK_RADIO_OFF));
1169
1170 return status;
1171 }
1172
1173 /* Query FW and update rfkill sw state for all rfkill switches */
tpacpi_rfk_update_swstate_all(void)1174 static void tpacpi_rfk_update_swstate_all(void)
1175 {
1176 unsigned int i;
1177
1178 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1179 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1180 }
1181
1182 /*
1183 * Sync the HW-blocking state of all rfkill switches,
1184 * do notice it causes the rfkill core to schedule uevents
1185 */
tpacpi_rfk_update_hwblock_state(bool blocked)1186 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1187 {
1188 unsigned int i;
1189 struct tpacpi_rfk *tp_rfk;
1190
1191 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1192 tp_rfk = tpacpi_rfkill_switches[i];
1193 if (tp_rfk) {
1194 if (rfkill_set_hw_state(tp_rfk->rfkill,
1195 blocked)) {
1196 /* ignore -- we track sw block */
1197 }
1198 }
1199 }
1200 }
1201
1202 /* Call to get the WLSW state from the firmware */
1203 static int hotkey_get_wlsw(void);
1204
1205 /* Call to query WLSW state and update all rfkill switches */
tpacpi_rfk_check_hwblock_state(void)1206 static bool tpacpi_rfk_check_hwblock_state(void)
1207 {
1208 int res = hotkey_get_wlsw();
1209 int hw_blocked;
1210
1211 /* When unknown or unsupported, we have to assume it is unblocked */
1212 if (res < 0)
1213 return false;
1214
1215 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1216 tpacpi_rfk_update_hwblock_state(hw_blocked);
1217
1218 return hw_blocked;
1219 }
1220
tpacpi_rfk_hook_set_block(void * data,bool blocked)1221 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1222 {
1223 struct tpacpi_rfk *tp_rfk = data;
1224 int res;
1225
1226 dbg_printk(TPACPI_DBG_RFKILL,
1227 "request to change radio state to %s\n",
1228 blocked ? "blocked" : "unblocked");
1229
1230 /* try to set radio state */
1231 res = (tp_rfk->ops->set_status)(blocked ?
1232 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1233
1234 /* and update the rfkill core with whatever the FW really did */
1235 tpacpi_rfk_update_swstate(tp_rfk);
1236
1237 return (res < 0) ? res : 0;
1238 }
1239
1240 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1241 .set_block = tpacpi_rfk_hook_set_block,
1242 };
1243
tpacpi_new_rfkill(const enum tpacpi_rfk_id id,const struct tpacpi_rfk_ops * tp_rfkops,const enum rfkill_type rfktype,const char * name,const bool set_default)1244 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1245 const struct tpacpi_rfk_ops *tp_rfkops,
1246 const enum rfkill_type rfktype,
1247 const char *name,
1248 const bool set_default)
1249 {
1250 struct tpacpi_rfk *atp_rfk;
1251 int res;
1252 bool sw_state = false;
1253 bool hw_state;
1254 int sw_status;
1255
1256 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1257
1258 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1259 if (atp_rfk)
1260 atp_rfk->rfkill = rfkill_alloc(name,
1261 &tpacpi_pdev->dev,
1262 rfktype,
1263 &tpacpi_rfk_rfkill_ops,
1264 atp_rfk);
1265 if (!atp_rfk || !atp_rfk->rfkill) {
1266 pr_err("failed to allocate memory for rfkill class\n");
1267 kfree(atp_rfk);
1268 return -ENOMEM;
1269 }
1270
1271 atp_rfk->id = id;
1272 atp_rfk->ops = tp_rfkops;
1273
1274 sw_status = (tp_rfkops->get_status)();
1275 if (sw_status < 0) {
1276 pr_err("failed to read initial state for %s, error %d\n",
1277 name, sw_status);
1278 } else {
1279 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1280 if (set_default) {
1281 /* try to keep the initial state, since we ask the
1282 * firmware to preserve it across S5 in NVRAM */
1283 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1284 }
1285 }
1286 hw_state = tpacpi_rfk_check_hwblock_state();
1287 rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1288
1289 res = rfkill_register(atp_rfk->rfkill);
1290 if (res < 0) {
1291 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1292 rfkill_destroy(atp_rfk->rfkill);
1293 kfree(atp_rfk);
1294 return res;
1295 }
1296
1297 tpacpi_rfkill_switches[id] = atp_rfk;
1298
1299 pr_info("rfkill switch %s: radio is %sblocked\n",
1300 name, (sw_state || hw_state) ? "" : "un");
1301 return 0;
1302 }
1303
tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)1304 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1305 {
1306 struct tpacpi_rfk *tp_rfk;
1307
1308 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1309
1310 tp_rfk = tpacpi_rfkill_switches[id];
1311 if (tp_rfk) {
1312 rfkill_unregister(tp_rfk->rfkill);
1313 rfkill_destroy(tp_rfk->rfkill);
1314 tpacpi_rfkill_switches[id] = NULL;
1315 kfree(tp_rfk);
1316 }
1317 }
1318
printk_deprecated_rfkill_attribute(const char * const what)1319 static void printk_deprecated_rfkill_attribute(const char * const what)
1320 {
1321 printk_deprecated_attribute(what,
1322 "Please switch to generic rfkill before year 2010");
1323 }
1324
1325 /* sysfs <radio> enable ------------------------------------------------ */
tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,struct device_attribute * attr,char * buf)1326 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1327 struct device_attribute *attr,
1328 char *buf)
1329 {
1330 int status;
1331
1332 printk_deprecated_rfkill_attribute(attr->attr.name);
1333
1334 /* This is in the ABI... */
1335 if (tpacpi_rfk_check_hwblock_state()) {
1336 status = TPACPI_RFK_RADIO_OFF;
1337 } else {
1338 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1339 if (status < 0)
1340 return status;
1341 }
1342
1343 return snprintf(buf, PAGE_SIZE, "%d\n",
1344 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1345 }
1346
tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,struct device_attribute * attr,const char * buf,size_t count)1347 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1348 struct device_attribute *attr,
1349 const char *buf, size_t count)
1350 {
1351 unsigned long t;
1352 int res;
1353
1354 printk_deprecated_rfkill_attribute(attr->attr.name);
1355
1356 if (parse_strtoul(buf, 1, &t))
1357 return -EINVAL;
1358
1359 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1360
1361 /* This is in the ABI... */
1362 if (tpacpi_rfk_check_hwblock_state() && !!t)
1363 return -EPERM;
1364
1365 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1366 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1367 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1368
1369 return (res < 0) ? res : count;
1370 }
1371
1372 /* procfs -------------------------------------------------------------- */
tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id,struct seq_file * m)1373 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1374 {
1375 if (id >= TPACPI_RFK_SW_MAX)
1376 seq_printf(m, "status:\t\tnot supported\n");
1377 else {
1378 int status;
1379
1380 /* This is in the ABI... */
1381 if (tpacpi_rfk_check_hwblock_state()) {
1382 status = TPACPI_RFK_RADIO_OFF;
1383 } else {
1384 status = tpacpi_rfk_update_swstate(
1385 tpacpi_rfkill_switches[id]);
1386 if (status < 0)
1387 return status;
1388 }
1389
1390 seq_printf(m, "status:\t\t%s\n",
1391 (status == TPACPI_RFK_RADIO_ON) ?
1392 "enabled" : "disabled");
1393 seq_printf(m, "commands:\tenable, disable\n");
1394 }
1395
1396 return 0;
1397 }
1398
tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id,char * buf)1399 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1400 {
1401 char *cmd;
1402 int status = -1;
1403 int res = 0;
1404
1405 if (id >= TPACPI_RFK_SW_MAX)
1406 return -ENODEV;
1407
1408 while ((cmd = strsep(&buf, ","))) {
1409 if (strlencmp(cmd, "enable") == 0)
1410 status = TPACPI_RFK_RADIO_ON;
1411 else if (strlencmp(cmd, "disable") == 0)
1412 status = TPACPI_RFK_RADIO_OFF;
1413 else
1414 return -EINVAL;
1415 }
1416
1417 if (status != -1) {
1418 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1419 (status == TPACPI_RFK_RADIO_ON) ?
1420 "enable" : "disable",
1421 tpacpi_rfkill_names[id]);
1422 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1423 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1424 }
1425
1426 return res;
1427 }
1428
1429 /*************************************************************************
1430 * thinkpad-acpi driver attributes
1431 */
1432
1433 /* interface_version --------------------------------------------------- */
interface_version_show(struct device_driver * drv,char * buf)1434 static ssize_t interface_version_show(struct device_driver *drv, char *buf)
1435 {
1436 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1437 }
1438 static DRIVER_ATTR_RO(interface_version);
1439
1440 /* debug_level --------------------------------------------------------- */
debug_level_show(struct device_driver * drv,char * buf)1441 static ssize_t debug_level_show(struct device_driver *drv, char *buf)
1442 {
1443 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1444 }
1445
debug_level_store(struct device_driver * drv,const char * buf,size_t count)1446 static ssize_t debug_level_store(struct device_driver *drv, const char *buf,
1447 size_t count)
1448 {
1449 unsigned long t;
1450
1451 if (parse_strtoul(buf, 0xffff, &t))
1452 return -EINVAL;
1453
1454 dbg_level = t;
1455
1456 return count;
1457 }
1458 static DRIVER_ATTR_RW(debug_level);
1459
1460 /* version ------------------------------------------------------------- */
version_show(struct device_driver * drv,char * buf)1461 static ssize_t version_show(struct device_driver *drv, char *buf)
1462 {
1463 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1464 TPACPI_DESC, TPACPI_VERSION);
1465 }
1466 static DRIVER_ATTR_RO(version);
1467
1468 /* --------------------------------------------------------------------- */
1469
1470 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1471
1472 /* wlsw_emulstate ------------------------------------------------------ */
wlsw_emulstate_show(struct device_driver * drv,char * buf)1473 static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf)
1474 {
1475 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1476 }
1477
wlsw_emulstate_store(struct device_driver * drv,const char * buf,size_t count)1478 static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf,
1479 size_t count)
1480 {
1481 unsigned long t;
1482
1483 if (parse_strtoul(buf, 1, &t))
1484 return -EINVAL;
1485
1486 if (tpacpi_wlsw_emulstate != !!t) {
1487 tpacpi_wlsw_emulstate = !!t;
1488 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1489 }
1490
1491 return count;
1492 }
1493 static DRIVER_ATTR_RW(wlsw_emulstate);
1494
1495 /* bluetooth_emulstate ------------------------------------------------- */
bluetooth_emulstate_show(struct device_driver * drv,char * buf)1496 static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf)
1497 {
1498 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1499 }
1500
bluetooth_emulstate_store(struct device_driver * drv,const char * buf,size_t count)1501 static ssize_t bluetooth_emulstate_store(struct device_driver *drv,
1502 const char *buf, size_t count)
1503 {
1504 unsigned long t;
1505
1506 if (parse_strtoul(buf, 1, &t))
1507 return -EINVAL;
1508
1509 tpacpi_bluetooth_emulstate = !!t;
1510
1511 return count;
1512 }
1513 static DRIVER_ATTR_RW(bluetooth_emulstate);
1514
1515 /* wwan_emulstate ------------------------------------------------- */
wwan_emulstate_show(struct device_driver * drv,char * buf)1516 static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf)
1517 {
1518 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1519 }
1520
wwan_emulstate_store(struct device_driver * drv,const char * buf,size_t count)1521 static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf,
1522 size_t count)
1523 {
1524 unsigned long t;
1525
1526 if (parse_strtoul(buf, 1, &t))
1527 return -EINVAL;
1528
1529 tpacpi_wwan_emulstate = !!t;
1530
1531 return count;
1532 }
1533 static DRIVER_ATTR_RW(wwan_emulstate);
1534
1535 /* uwb_emulstate ------------------------------------------------- */
uwb_emulstate_show(struct device_driver * drv,char * buf)1536 static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf)
1537 {
1538 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1539 }
1540
uwb_emulstate_store(struct device_driver * drv,const char * buf,size_t count)1541 static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf,
1542 size_t count)
1543 {
1544 unsigned long t;
1545
1546 if (parse_strtoul(buf, 1, &t))
1547 return -EINVAL;
1548
1549 tpacpi_uwb_emulstate = !!t;
1550
1551 return count;
1552 }
1553 static DRIVER_ATTR_RW(uwb_emulstate);
1554 #endif
1555
1556 /* --------------------------------------------------------------------- */
1557
1558 static struct driver_attribute *tpacpi_driver_attributes[] = {
1559 &driver_attr_debug_level, &driver_attr_version,
1560 &driver_attr_interface_version,
1561 };
1562
tpacpi_create_driver_attributes(struct device_driver * drv)1563 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1564 {
1565 int i, res;
1566
1567 i = 0;
1568 res = 0;
1569 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1570 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1571 i++;
1572 }
1573
1574 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1575 if (!res && dbg_wlswemul)
1576 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1577 if (!res && dbg_bluetoothemul)
1578 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1579 if (!res && dbg_wwanemul)
1580 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1581 if (!res && dbg_uwbemul)
1582 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1583 #endif
1584
1585 return res;
1586 }
1587
tpacpi_remove_driver_attributes(struct device_driver * drv)1588 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1589 {
1590 int i;
1591
1592 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1593 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1594
1595 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1596 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1597 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1598 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1599 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1600 #endif
1601 }
1602
1603 /*************************************************************************
1604 * Firmware Data
1605 */
1606
1607 /*
1608 * Table of recommended minimum BIOS versions
1609 *
1610 * Reasons for listing:
1611 * 1. Stable BIOS, listed because the unknown amount of
1612 * bugs and bad ACPI behaviour on older versions
1613 *
1614 * 2. BIOS or EC fw with known bugs that trigger on Linux
1615 *
1616 * 3. BIOS with known reduced functionality in older versions
1617 *
1618 * We recommend the latest BIOS and EC version.
1619 * We only support the latest BIOS and EC fw version as a rule.
1620 *
1621 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1622 * Information from users in ThinkWiki
1623 *
1624 * WARNING: we use this table also to detect that the machine is
1625 * a ThinkPad in some cases, so don't remove entries lightly.
1626 */
1627
1628 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1629 { .vendor = (__v), \
1630 .bios = TPID(__id1, __id2), \
1631 .ec = TPACPI_MATCH_ANY, \
1632 .quirks = TPACPI_MATCH_ANY_VERSION << 16 \
1633 | TPVER(__bv1, __bv2) }
1634
1635 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1636 __eid, __ev1, __ev2) \
1637 { .vendor = (__v), \
1638 .bios = TPID(__bid1, __bid2), \
1639 .ec = __eid, \
1640 .quirks = TPVER(__ev1, __ev2) << 16 \
1641 | TPVER(__bv1, __bv2) }
1642
1643 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1644 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1645
1646 /* Outdated IBM BIOSes often lack the EC id string */
1647 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1648 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1649 __bv1, __bv2, TPID(__id1, __id2), \
1650 __ev1, __ev2), \
1651 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1652 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1653 __ev1, __ev2)
1654
1655 /* Outdated IBM BIOSes often lack the EC id string */
1656 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1657 __eid1, __eid2, __ev1, __ev2) \
1658 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1659 __bv1, __bv2, TPID(__eid1, __eid2), \
1660 __ev1, __ev2), \
1661 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1662 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1663 __ev1, __ev2)
1664
1665 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1666 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1667
1668 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1669 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1670 __bv1, __bv2, TPID(__id1, __id2), \
1671 __ev1, __ev2)
1672
1673 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1674 __eid1, __eid2, __ev1, __ev2) \
1675 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1676 __bv1, __bv2, TPID(__eid1, __eid2), \
1677 __ev1, __ev2)
1678
1679 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1680 /* Numeric models ------------------ */
1681 /* FW MODEL BIOS VERS */
1682 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1683 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1684 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1685 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1686 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1687 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1688 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1689 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1690 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1691
1692 /* A-series ------------------------- */
1693 /* FW MODEL BIOS VERS EC VERS */
1694 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1695 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1696 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1697 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1698 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1699 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1700 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1701 TPV_QI0('1', '3', '2', '0'), /* A22m */
1702 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1703 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1704 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1705
1706 /* G-series ------------------------- */
1707 /* FW MODEL BIOS VERS */
1708 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1709 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1710
1711 /* R-series, T-series --------------- */
1712 /* FW MODEL BIOS VERS EC VERS */
1713 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1714 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1715 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1716 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1717 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1718 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1719 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1720 T40/p, T41/p, T42/p (1) */
1721 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1722 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1723 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1724 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1725
1726 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1727 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1728 TPV_QI0('1', '6', '3', '2'), /* T22 */
1729 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1730 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1731 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1732
1733 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1734 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1735 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
1736
1737 /* BIOS FW BIOS VERS EC FW EC VERS */
1738 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1739 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1740
1741 /* X-series ------------------------- */
1742 /* FW MODEL BIOS VERS EC VERS */
1743 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1744 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1745 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1746 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1747 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1748 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1749 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1750
1751 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
1752 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
1753
1754 /* (0) - older versions lack DMI EC fw string and functionality */
1755 /* (1) - older versions known to lack functionality */
1756 };
1757
1758 #undef TPV_QL1
1759 #undef TPV_QL0
1760 #undef TPV_QI2
1761 #undef TPV_QI1
1762 #undef TPV_QI0
1763 #undef TPV_Q_X
1764 #undef TPV_Q
1765
tpacpi_check_outdated_fw(void)1766 static void __init tpacpi_check_outdated_fw(void)
1767 {
1768 unsigned long fwvers;
1769 u16 ec_version, bios_version;
1770
1771 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1772 ARRAY_SIZE(tpacpi_bios_version_qtable));
1773
1774 if (!fwvers)
1775 return;
1776
1777 bios_version = fwvers & 0xffffU;
1778 ec_version = (fwvers >> 16) & 0xffffU;
1779
1780 /* note that unknown versions are set to 0x0000 and we use that */
1781 if ((bios_version > thinkpad_id.bios_release) ||
1782 (ec_version > thinkpad_id.ec_release &&
1783 ec_version != TPACPI_MATCH_ANY_VERSION)) {
1784 /*
1785 * The changelogs would let us track down the exact
1786 * reason, but it is just too much of a pain to track
1787 * it. We only list BIOSes that are either really
1788 * broken, or really stable to begin with, so it is
1789 * best if the user upgrades the firmware anyway.
1790 */
1791 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1792 pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n");
1793 }
1794 }
1795
tpacpi_is_fw_known(void)1796 static bool __init tpacpi_is_fw_known(void)
1797 {
1798 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1799 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1800 }
1801
1802 /****************************************************************************
1803 ****************************************************************************
1804 *
1805 * Subdrivers
1806 *
1807 ****************************************************************************
1808 ****************************************************************************/
1809
1810 /*************************************************************************
1811 * thinkpad-acpi metadata subdriver
1812 */
1813
thinkpad_acpi_driver_read(struct seq_file * m)1814 static int thinkpad_acpi_driver_read(struct seq_file *m)
1815 {
1816 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1817 seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1818 return 0;
1819 }
1820
1821 static struct ibm_struct thinkpad_acpi_driver_data = {
1822 .name = "driver",
1823 .read = thinkpad_acpi_driver_read,
1824 };
1825
1826 /*************************************************************************
1827 * Hotkey subdriver
1828 */
1829
1830 /*
1831 * ThinkPad firmware event model
1832 *
1833 * The ThinkPad firmware has two main event interfaces: normal ACPI
1834 * notifications (which follow the ACPI standard), and a private event
1835 * interface.
1836 *
1837 * The private event interface also issues events for the hotkeys. As
1838 * the driver gained features, the event handling code ended up being
1839 * built around the hotkey subdriver. This will need to be refactored
1840 * to a more formal event API eventually.
1841 *
1842 * Some "hotkeys" are actually supposed to be used as event reports,
1843 * such as "brightness has changed", "volume has changed", depending on
1844 * the ThinkPad model and how the firmware is operating.
1845 *
1846 * Unlike other classes, hotkey-class events have mask/unmask control on
1847 * non-ancient firmware. However, how it behaves changes a lot with the
1848 * firmware model and version.
1849 */
1850
1851 enum { /* hot key scan codes (derived from ACPI DSDT) */
1852 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1853 TP_ACPI_HOTKEYSCAN_FNF2,
1854 TP_ACPI_HOTKEYSCAN_FNF3,
1855 TP_ACPI_HOTKEYSCAN_FNF4,
1856 TP_ACPI_HOTKEYSCAN_FNF5,
1857 TP_ACPI_HOTKEYSCAN_FNF6,
1858 TP_ACPI_HOTKEYSCAN_FNF7,
1859 TP_ACPI_HOTKEYSCAN_FNF8,
1860 TP_ACPI_HOTKEYSCAN_FNF9,
1861 TP_ACPI_HOTKEYSCAN_FNF10,
1862 TP_ACPI_HOTKEYSCAN_FNF11,
1863 TP_ACPI_HOTKEYSCAN_FNF12,
1864 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1865 TP_ACPI_HOTKEYSCAN_FNINSERT,
1866 TP_ACPI_HOTKEYSCAN_FNDELETE,
1867 TP_ACPI_HOTKEYSCAN_FNHOME,
1868 TP_ACPI_HOTKEYSCAN_FNEND,
1869 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1870 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1871 TP_ACPI_HOTKEYSCAN_FNSPACE,
1872 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1873 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1874 TP_ACPI_HOTKEYSCAN_MUTE,
1875 TP_ACPI_HOTKEYSCAN_THINKPAD,
1876 TP_ACPI_HOTKEYSCAN_UNK1,
1877 TP_ACPI_HOTKEYSCAN_UNK2,
1878 TP_ACPI_HOTKEYSCAN_UNK3,
1879 TP_ACPI_HOTKEYSCAN_UNK4,
1880 TP_ACPI_HOTKEYSCAN_UNK5,
1881 TP_ACPI_HOTKEYSCAN_UNK6,
1882 TP_ACPI_HOTKEYSCAN_UNK7,
1883 TP_ACPI_HOTKEYSCAN_UNK8,
1884
1885 /* Adaptive keyboard keycodes */
1886 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
1887 TP_ACPI_HOTKEYSCAN_MUTE2 = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
1888 TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO,
1889 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL,
1890 TP_ACPI_HOTKEYSCAN_CLOUD,
1891 TP_ACPI_HOTKEYSCAN_UNK9,
1892 TP_ACPI_HOTKEYSCAN_VOICE,
1893 TP_ACPI_HOTKEYSCAN_UNK10,
1894 TP_ACPI_HOTKEYSCAN_GESTURES,
1895 TP_ACPI_HOTKEYSCAN_UNK11,
1896 TP_ACPI_HOTKEYSCAN_UNK12,
1897 TP_ACPI_HOTKEYSCAN_UNK13,
1898 TP_ACPI_HOTKEYSCAN_CONFIG,
1899 TP_ACPI_HOTKEYSCAN_NEW_TAB,
1900 TP_ACPI_HOTKEYSCAN_RELOAD,
1901 TP_ACPI_HOTKEYSCAN_BACK,
1902 TP_ACPI_HOTKEYSCAN_MIC_DOWN,
1903 TP_ACPI_HOTKEYSCAN_MIC_UP,
1904 TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION,
1905 TP_ACPI_HOTKEYSCAN_CAMERA_MODE,
1906 TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY,
1907
1908 /* Lenovo extended keymap, starting at 0x1300 */
1909 TP_ACPI_HOTKEYSCAN_EXTENDED_START,
1910 /* first new observed key (star, favorites) is 0x1311 */
1911 TP_ACPI_HOTKEYSCAN_STAR = 69,
1912 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2,
1913 TP_ACPI_HOTKEYSCAN_CALCULATOR,
1914 TP_ACPI_HOTKEYSCAN_BLUETOOTH,
1915 TP_ACPI_HOTKEYSCAN_KEYBOARD,
1916 TP_ACPI_HOTKEYSCAN_FN_RIGHT_SHIFT, /* Used by "Lenovo Quick Clean" */
1917 TP_ACPI_HOTKEYSCAN_NOTIFICATION_CENTER,
1918 TP_ACPI_HOTKEYSCAN_PICKUP_PHONE,
1919 TP_ACPI_HOTKEYSCAN_HANGUP_PHONE,
1920
1921 /* Hotkey keymap size */
1922 TPACPI_HOTKEY_MAP_LEN
1923 };
1924
1925 enum { /* Keys/events available through NVRAM polling */
1926 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1927 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1928 };
1929
1930 enum { /* Positions of some of the keys in hotkey masks */
1931 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1932 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1933 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1934 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1935 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1936 TP_ACPI_HKEY_KBD_LIGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1937 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1938 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1939 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1940 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1941 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1942 };
1943
1944 enum { /* NVRAM to ACPI HKEY group map */
1945 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1946 TP_ACPI_HKEY_ZOOM_MASK |
1947 TP_ACPI_HKEY_DISPSWTCH_MASK |
1948 TP_ACPI_HKEY_HIBERNATE_MASK,
1949 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1950 TP_ACPI_HKEY_BRGHTDWN_MASK,
1951 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1952 TP_ACPI_HKEY_VOLDWN_MASK |
1953 TP_ACPI_HKEY_MUTE_MASK,
1954 };
1955
1956 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1957 struct tp_nvram_state {
1958 u16 thinkpad_toggle:1;
1959 u16 zoom_toggle:1;
1960 u16 display_toggle:1;
1961 u16 thinklight_toggle:1;
1962 u16 hibernate_toggle:1;
1963 u16 displayexp_toggle:1;
1964 u16 display_state:1;
1965 u16 brightness_toggle:1;
1966 u16 volume_toggle:1;
1967 u16 mute:1;
1968
1969 u8 brightness_level;
1970 u8 volume_level;
1971 };
1972
1973 /* kthread for the hotkey poller */
1974 static struct task_struct *tpacpi_hotkey_task;
1975
1976 /*
1977 * Acquire mutex to write poller control variables as an
1978 * atomic block.
1979 *
1980 * Increment hotkey_config_change when changing them if you
1981 * want the kthread to forget old state.
1982 *
1983 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1984 */
1985 static struct mutex hotkey_thread_data_mutex;
1986 static unsigned int hotkey_config_change;
1987
1988 /*
1989 * hotkey poller control variables
1990 *
1991 * Must be atomic or readers will also need to acquire mutex
1992 *
1993 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1994 * should be used only when the changes need to be taken as
1995 * a block, OR when one needs to force the kthread to forget
1996 * old state.
1997 */
1998 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1999 static unsigned int hotkey_poll_freq = 10; /* Hz */
2000
2001 #define HOTKEY_CONFIG_CRITICAL_START \
2002 do { \
2003 mutex_lock(&hotkey_thread_data_mutex); \
2004 hotkey_config_change++; \
2005 } while (0);
2006 #define HOTKEY_CONFIG_CRITICAL_END \
2007 mutex_unlock(&hotkey_thread_data_mutex);
2008
2009 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2010
2011 #define hotkey_source_mask 0U
2012 #define HOTKEY_CONFIG_CRITICAL_START
2013 #define HOTKEY_CONFIG_CRITICAL_END
2014
2015 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2016
2017 static struct mutex hotkey_mutex;
2018
2019 static enum { /* Reasons for waking up */
2020 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
2021 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
2022 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
2023 } hotkey_wakeup_reason;
2024
2025 static int hotkey_autosleep_ack;
2026
2027 static u32 hotkey_orig_mask; /* events the BIOS had enabled */
2028 static u32 hotkey_all_mask; /* all events supported in fw */
2029 static u32 hotkey_adaptive_all_mask; /* all adaptive events supported in fw */
2030 static u32 hotkey_reserved_mask; /* events better left disabled */
2031 static u32 hotkey_driver_mask; /* events needed by the driver */
2032 static u32 hotkey_user_mask; /* events visible to userspace */
2033 static u32 hotkey_acpi_mask; /* events enabled in firmware */
2034
2035 static u16 *hotkey_keycode_map;
2036
2037 static struct attribute_set *hotkey_dev_attributes;
2038
2039 static void tpacpi_driver_event(const unsigned int hkey_event);
2040 static void hotkey_driver_event(const unsigned int scancode);
2041 static void hotkey_poll_setup(const bool may_warn);
2042
2043 /* HKEY.MHKG() return bits */
2044 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2045 enum {
2046 TP_ACPI_MULTI_MODE_INVALID = 0,
2047 TP_ACPI_MULTI_MODE_UNKNOWN = 1 << 0,
2048 TP_ACPI_MULTI_MODE_LAPTOP = 1 << 1,
2049 TP_ACPI_MULTI_MODE_TABLET = 1 << 2,
2050 TP_ACPI_MULTI_MODE_FLAT = 1 << 3,
2051 TP_ACPI_MULTI_MODE_STAND = 1 << 4,
2052 TP_ACPI_MULTI_MODE_TENT = 1 << 5,
2053 TP_ACPI_MULTI_MODE_STAND_TENT = 1 << 6,
2054 };
2055
2056 enum {
2057 /* The following modes are considered tablet mode for the purpose of
2058 * reporting the status to userspace. i.e. in all these modes it makes
2059 * sense to disable the laptop input devices such as touchpad and
2060 * keyboard.
2061 */
2062 TP_ACPI_MULTI_MODE_TABLET_LIKE = TP_ACPI_MULTI_MODE_TABLET |
2063 TP_ACPI_MULTI_MODE_STAND |
2064 TP_ACPI_MULTI_MODE_TENT |
2065 TP_ACPI_MULTI_MODE_STAND_TENT,
2066 };
2067
hotkey_get_wlsw(void)2068 static int hotkey_get_wlsw(void)
2069 {
2070 int status;
2071
2072 if (!tp_features.hotkey_wlsw)
2073 return -ENODEV;
2074
2075 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2076 if (dbg_wlswemul)
2077 return (tpacpi_wlsw_emulstate) ?
2078 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2079 #endif
2080
2081 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2082 return -EIO;
2083
2084 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2085 }
2086
hotkey_gmms_get_tablet_mode(int s,int * has_tablet_mode)2087 static int hotkey_gmms_get_tablet_mode(int s, int *has_tablet_mode)
2088 {
2089 int type = (s >> 16) & 0xffff;
2090 int value = s & 0xffff;
2091 int mode = TP_ACPI_MULTI_MODE_INVALID;
2092 int valid_modes = 0;
2093
2094 if (has_tablet_mode)
2095 *has_tablet_mode = 0;
2096
2097 switch (type) {
2098 case 1:
2099 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2100 TP_ACPI_MULTI_MODE_TABLET |
2101 TP_ACPI_MULTI_MODE_STAND_TENT;
2102 break;
2103 case 2:
2104 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2105 TP_ACPI_MULTI_MODE_FLAT |
2106 TP_ACPI_MULTI_MODE_TABLET |
2107 TP_ACPI_MULTI_MODE_STAND |
2108 TP_ACPI_MULTI_MODE_TENT;
2109 break;
2110 case 3:
2111 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2112 TP_ACPI_MULTI_MODE_FLAT;
2113 break;
2114 case 4:
2115 case 5:
2116 /* In mode 4, FLAT is not specified as a valid mode. However,
2117 * it can be seen at least on the X1 Yoga 2nd Generation.
2118 */
2119 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2120 TP_ACPI_MULTI_MODE_FLAT |
2121 TP_ACPI_MULTI_MODE_TABLET |
2122 TP_ACPI_MULTI_MODE_STAND |
2123 TP_ACPI_MULTI_MODE_TENT;
2124 break;
2125 default:
2126 pr_err("Unknown multi mode status type %d with value 0x%04X, please report this to %s\n",
2127 type, value, TPACPI_MAIL);
2128 return 0;
2129 }
2130
2131 if (has_tablet_mode && (valid_modes & TP_ACPI_MULTI_MODE_TABLET_LIKE))
2132 *has_tablet_mode = 1;
2133
2134 switch (value) {
2135 case 1:
2136 mode = TP_ACPI_MULTI_MODE_LAPTOP;
2137 break;
2138 case 2:
2139 mode = TP_ACPI_MULTI_MODE_FLAT;
2140 break;
2141 case 3:
2142 mode = TP_ACPI_MULTI_MODE_TABLET;
2143 break;
2144 case 4:
2145 if (type == 1)
2146 mode = TP_ACPI_MULTI_MODE_STAND_TENT;
2147 else
2148 mode = TP_ACPI_MULTI_MODE_STAND;
2149 break;
2150 case 5:
2151 mode = TP_ACPI_MULTI_MODE_TENT;
2152 break;
2153 default:
2154 if (type == 5 && value == 0xffff) {
2155 pr_warn("Multi mode status is undetected, assuming laptop\n");
2156 return 0;
2157 }
2158 }
2159
2160 if (!(mode & valid_modes)) {
2161 pr_err("Unknown/reserved multi mode value 0x%04X for type %d, please report this to %s\n",
2162 value, type, TPACPI_MAIL);
2163 return 0;
2164 }
2165
2166 return !!(mode & TP_ACPI_MULTI_MODE_TABLET_LIKE);
2167 }
2168
hotkey_get_tablet_mode(int * status)2169 static int hotkey_get_tablet_mode(int *status)
2170 {
2171 int s;
2172
2173 switch (tp_features.hotkey_tablet) {
2174 case TP_HOTKEY_TABLET_USES_MHKG:
2175 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2176 return -EIO;
2177
2178 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2179 break;
2180 case TP_HOTKEY_TABLET_USES_GMMS:
2181 if (!acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0))
2182 return -EIO;
2183
2184 *status = hotkey_gmms_get_tablet_mode(s, NULL);
2185 break;
2186 default:
2187 break;
2188 }
2189
2190 return 0;
2191 }
2192
2193 /*
2194 * Reads current event mask from firmware, and updates
2195 * hotkey_acpi_mask accordingly. Also resets any bits
2196 * from hotkey_user_mask that are unavailable to be
2197 * delivered (shadow requirement of the userspace ABI).
2198 *
2199 * Call with hotkey_mutex held
2200 */
hotkey_mask_get(void)2201 static int hotkey_mask_get(void)
2202 {
2203 if (tp_features.hotkey_mask) {
2204 u32 m = 0;
2205
2206 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2207 return -EIO;
2208
2209 hotkey_acpi_mask = m;
2210 } else {
2211 /* no mask support doesn't mean no event support... */
2212 hotkey_acpi_mask = hotkey_all_mask;
2213 }
2214
2215 /* sync userspace-visible mask */
2216 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2217
2218 return 0;
2219 }
2220
hotkey_mask_warn_incomplete_mask(void)2221 static void hotkey_mask_warn_incomplete_mask(void)
2222 {
2223 /* log only what the user can fix... */
2224 const u32 wantedmask = hotkey_driver_mask &
2225 ~(hotkey_acpi_mask | hotkey_source_mask) &
2226 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2227
2228 if (wantedmask)
2229 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2230 }
2231
2232 /*
2233 * Set the firmware mask when supported
2234 *
2235 * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2236 *
2237 * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2238 *
2239 * Call with hotkey_mutex held
2240 */
hotkey_mask_set(u32 mask)2241 static int hotkey_mask_set(u32 mask)
2242 {
2243 int i;
2244 int rc = 0;
2245
2246 const u32 fwmask = mask & ~hotkey_source_mask;
2247
2248 if (tp_features.hotkey_mask) {
2249 for (i = 0; i < 32; i++) {
2250 if (!acpi_evalf(hkey_handle,
2251 NULL, "MHKM", "vdd", i + 1,
2252 !!(mask & (1 << i)))) {
2253 rc = -EIO;
2254 break;
2255 }
2256 }
2257 }
2258
2259 /*
2260 * We *must* make an inconditional call to hotkey_mask_get to
2261 * refresh hotkey_acpi_mask and update hotkey_user_mask
2262 *
2263 * Take the opportunity to also log when we cannot _enable_
2264 * a given event.
2265 */
2266 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2267 pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n",
2268 fwmask, hotkey_acpi_mask);
2269 }
2270
2271 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2272 hotkey_mask_warn_incomplete_mask();
2273
2274 return rc;
2275 }
2276
2277 /*
2278 * Sets hotkey_user_mask and tries to set the firmware mask
2279 *
2280 * Call with hotkey_mutex held
2281 */
hotkey_user_mask_set(const u32 mask)2282 static int hotkey_user_mask_set(const u32 mask)
2283 {
2284 int rc;
2285
2286 /* Give people a chance to notice they are doing something that
2287 * is bound to go boom on their users sooner or later */
2288 if (!tp_warned.hotkey_mask_ff &&
2289 (mask == 0xffff || mask == 0xffffff ||
2290 mask == 0xffffffff)) {
2291 tp_warned.hotkey_mask_ff = 1;
2292 pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n",
2293 mask);
2294 pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n");
2295 }
2296
2297 /* Try to enable what the user asked for, plus whatever we need.
2298 * this syncs everything but won't enable bits in hotkey_user_mask */
2299 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2300
2301 /* Enable the available bits in hotkey_user_mask */
2302 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2303
2304 return rc;
2305 }
2306
2307 /*
2308 * Sets the driver hotkey mask.
2309 *
2310 * Can be called even if the hotkey subdriver is inactive
2311 */
tpacpi_hotkey_driver_mask_set(const u32 mask)2312 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2313 {
2314 int rc;
2315
2316 /* Do the right thing if hotkey_init has not been called yet */
2317 if (!tp_features.hotkey) {
2318 hotkey_driver_mask = mask;
2319 return 0;
2320 }
2321
2322 mutex_lock(&hotkey_mutex);
2323
2324 HOTKEY_CONFIG_CRITICAL_START
2325 hotkey_driver_mask = mask;
2326 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2327 hotkey_source_mask |= (mask & ~hotkey_all_mask);
2328 #endif
2329 HOTKEY_CONFIG_CRITICAL_END
2330
2331 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2332 ~hotkey_source_mask);
2333 hotkey_poll_setup(true);
2334
2335 mutex_unlock(&hotkey_mutex);
2336
2337 return rc;
2338 }
2339
hotkey_status_get(int * status)2340 static int hotkey_status_get(int *status)
2341 {
2342 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2343 return -EIO;
2344
2345 return 0;
2346 }
2347
hotkey_status_set(bool enable)2348 static int hotkey_status_set(bool enable)
2349 {
2350 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2351 return -EIO;
2352
2353 return 0;
2354 }
2355
tpacpi_input_send_tabletsw(void)2356 static void tpacpi_input_send_tabletsw(void)
2357 {
2358 int state;
2359
2360 if (tp_features.hotkey_tablet &&
2361 !hotkey_get_tablet_mode(&state)) {
2362 mutex_lock(&tpacpi_inputdev_send_mutex);
2363
2364 input_report_switch(tpacpi_inputdev,
2365 SW_TABLET_MODE, !!state);
2366 input_sync(tpacpi_inputdev);
2367
2368 mutex_unlock(&tpacpi_inputdev_send_mutex);
2369 }
2370 }
2371
2372 /* Do NOT call without validating scancode first */
tpacpi_input_send_key(const unsigned int scancode)2373 static void tpacpi_input_send_key(const unsigned int scancode)
2374 {
2375 const unsigned int keycode = hotkey_keycode_map[scancode];
2376
2377 if (keycode != KEY_RESERVED) {
2378 mutex_lock(&tpacpi_inputdev_send_mutex);
2379
2380 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2381 input_report_key(tpacpi_inputdev, keycode, 1);
2382 input_sync(tpacpi_inputdev);
2383
2384 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2385 input_report_key(tpacpi_inputdev, keycode, 0);
2386 input_sync(tpacpi_inputdev);
2387
2388 mutex_unlock(&tpacpi_inputdev_send_mutex);
2389 }
2390 }
2391
2392 /* Do NOT call without validating scancode first */
tpacpi_input_send_key_masked(const unsigned int scancode)2393 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2394 {
2395 hotkey_driver_event(scancode);
2396 if (hotkey_user_mask & (1 << scancode))
2397 tpacpi_input_send_key(scancode);
2398 }
2399
2400 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2401 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2402
2403 /* Do NOT call without validating scancode first */
tpacpi_hotkey_send_key(unsigned int scancode)2404 static void tpacpi_hotkey_send_key(unsigned int scancode)
2405 {
2406 tpacpi_input_send_key_masked(scancode);
2407 }
2408
hotkey_read_nvram(struct tp_nvram_state * n,const u32 m)2409 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2410 {
2411 u8 d;
2412
2413 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2414 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2415 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2416 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2417 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2418 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2419 }
2420 if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) {
2421 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2422 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2423 }
2424 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2425 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2426 n->displayexp_toggle =
2427 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2428 }
2429 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2430 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2431 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2432 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2433 n->brightness_toggle =
2434 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2435 }
2436 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2437 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2438 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2439 >> TP_NVRAM_POS_LEVEL_VOLUME;
2440 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2441 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2442 }
2443 }
2444
2445 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2446 do { \
2447 if ((event_mask & (1 << __scancode)) && \
2448 oldn->__member != newn->__member) \
2449 tpacpi_hotkey_send_key(__scancode); \
2450 } while (0)
2451
2452 #define TPACPI_MAY_SEND_KEY(__scancode) \
2453 do { \
2454 if (event_mask & (1 << __scancode)) \
2455 tpacpi_hotkey_send_key(__scancode); \
2456 } while (0)
2457
issue_volchange(const unsigned int oldvol,const unsigned int newvol,const u32 event_mask)2458 static void issue_volchange(const unsigned int oldvol,
2459 const unsigned int newvol,
2460 const u32 event_mask)
2461 {
2462 unsigned int i = oldvol;
2463
2464 while (i > newvol) {
2465 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2466 i--;
2467 }
2468 while (i < newvol) {
2469 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2470 i++;
2471 }
2472 }
2473
issue_brightnesschange(const unsigned int oldbrt,const unsigned int newbrt,const u32 event_mask)2474 static void issue_brightnesschange(const unsigned int oldbrt,
2475 const unsigned int newbrt,
2476 const u32 event_mask)
2477 {
2478 unsigned int i = oldbrt;
2479
2480 while (i > newbrt) {
2481 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2482 i--;
2483 }
2484 while (i < newbrt) {
2485 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2486 i++;
2487 }
2488 }
2489
hotkey_compare_and_issue_event(struct tp_nvram_state * oldn,struct tp_nvram_state * newn,const u32 event_mask)2490 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2491 struct tp_nvram_state *newn,
2492 const u32 event_mask)
2493 {
2494
2495 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2496 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2497 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2498 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2499
2500 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2501
2502 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2503
2504 /*
2505 * Handle volume
2506 *
2507 * This code is supposed to duplicate the IBM firmware behaviour:
2508 * - Pressing MUTE issues mute hotkey message, even when already mute
2509 * - Pressing Volume up/down issues volume up/down hotkey messages,
2510 * even when already at maximum or minimum volume
2511 * - The act of unmuting issues volume up/down notification,
2512 * depending which key was used to unmute
2513 *
2514 * We are constrained to what the NVRAM can tell us, which is not much
2515 * and certainly not enough if more than one volume hotkey was pressed
2516 * since the last poll cycle.
2517 *
2518 * Just to make our life interesting, some newer Lenovo ThinkPads have
2519 * bugs in the BIOS and may fail to update volume_toggle properly.
2520 */
2521 if (newn->mute) {
2522 /* muted */
2523 if (!oldn->mute ||
2524 oldn->volume_toggle != newn->volume_toggle ||
2525 oldn->volume_level != newn->volume_level) {
2526 /* recently muted, or repeated mute keypress, or
2527 * multiple presses ending in mute */
2528 issue_volchange(oldn->volume_level, newn->volume_level,
2529 event_mask);
2530 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2531 }
2532 } else {
2533 /* unmute */
2534 if (oldn->mute) {
2535 /* recently unmuted, issue 'unmute' keypress */
2536 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2537 }
2538 if (oldn->volume_level != newn->volume_level) {
2539 issue_volchange(oldn->volume_level, newn->volume_level,
2540 event_mask);
2541 } else if (oldn->volume_toggle != newn->volume_toggle) {
2542 /* repeated vol up/down keypress at end of scale ? */
2543 if (newn->volume_level == 0)
2544 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2545 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2546 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2547 }
2548 }
2549
2550 /* handle brightness */
2551 if (oldn->brightness_level != newn->brightness_level) {
2552 issue_brightnesschange(oldn->brightness_level,
2553 newn->brightness_level, event_mask);
2554 } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2555 /* repeated key presses that didn't change state */
2556 if (newn->brightness_level == 0)
2557 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2558 else if (newn->brightness_level >= bright_maxlvl
2559 && !tp_features.bright_unkfw)
2560 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2561 }
2562
2563 #undef TPACPI_COMPARE_KEY
2564 #undef TPACPI_MAY_SEND_KEY
2565 }
2566
2567 /*
2568 * Polling driver
2569 *
2570 * We track all events in hotkey_source_mask all the time, since
2571 * most of them are edge-based. We only issue those requested by
2572 * hotkey_user_mask or hotkey_driver_mask, though.
2573 */
hotkey_kthread(void * data)2574 static int hotkey_kthread(void *data)
2575 {
2576 struct tp_nvram_state s[2] = { 0 };
2577 u32 poll_mask, event_mask;
2578 unsigned int si, so;
2579 unsigned long t;
2580 unsigned int change_detector;
2581 unsigned int poll_freq;
2582 bool was_frozen;
2583
2584 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2585 goto exit;
2586
2587 set_freezable();
2588
2589 so = 0;
2590 si = 1;
2591 t = 0;
2592
2593 /* Initial state for compares */
2594 mutex_lock(&hotkey_thread_data_mutex);
2595 change_detector = hotkey_config_change;
2596 poll_mask = hotkey_source_mask;
2597 event_mask = hotkey_source_mask &
2598 (hotkey_driver_mask | hotkey_user_mask);
2599 poll_freq = hotkey_poll_freq;
2600 mutex_unlock(&hotkey_thread_data_mutex);
2601 hotkey_read_nvram(&s[so], poll_mask);
2602
2603 while (!kthread_should_stop()) {
2604 if (t == 0) {
2605 if (likely(poll_freq))
2606 t = 1000/poll_freq;
2607 else
2608 t = 100; /* should never happen... */
2609 }
2610 t = msleep_interruptible(t);
2611 if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2612 break;
2613
2614 if (t > 0 && !was_frozen)
2615 continue;
2616
2617 mutex_lock(&hotkey_thread_data_mutex);
2618 if (was_frozen || hotkey_config_change != change_detector) {
2619 /* forget old state on thaw or config change */
2620 si = so;
2621 t = 0;
2622 change_detector = hotkey_config_change;
2623 }
2624 poll_mask = hotkey_source_mask;
2625 event_mask = hotkey_source_mask &
2626 (hotkey_driver_mask | hotkey_user_mask);
2627 poll_freq = hotkey_poll_freq;
2628 mutex_unlock(&hotkey_thread_data_mutex);
2629
2630 if (likely(poll_mask)) {
2631 hotkey_read_nvram(&s[si], poll_mask);
2632 if (likely(si != so)) {
2633 hotkey_compare_and_issue_event(&s[so], &s[si],
2634 event_mask);
2635 }
2636 }
2637
2638 so = si;
2639 si ^= 1;
2640 }
2641
2642 exit:
2643 return 0;
2644 }
2645
2646 /* call with hotkey_mutex held */
hotkey_poll_stop_sync(void)2647 static void hotkey_poll_stop_sync(void)
2648 {
2649 if (tpacpi_hotkey_task) {
2650 kthread_stop(tpacpi_hotkey_task);
2651 tpacpi_hotkey_task = NULL;
2652 }
2653 }
2654
2655 /* call with hotkey_mutex held */
hotkey_poll_setup(const bool may_warn)2656 static void hotkey_poll_setup(const bool may_warn)
2657 {
2658 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2659 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2660
2661 if (hotkey_poll_freq > 0 &&
2662 (poll_driver_mask ||
2663 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2664 if (!tpacpi_hotkey_task) {
2665 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2666 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2667 if (IS_ERR(tpacpi_hotkey_task)) {
2668 tpacpi_hotkey_task = NULL;
2669 pr_err("could not create kernel thread for hotkey polling\n");
2670 }
2671 }
2672 } else {
2673 hotkey_poll_stop_sync();
2674 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2675 hotkey_poll_freq == 0) {
2676 pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n",
2677 poll_user_mask, poll_driver_mask);
2678 }
2679 }
2680 }
2681
hotkey_poll_setup_safe(const bool may_warn)2682 static void hotkey_poll_setup_safe(const bool may_warn)
2683 {
2684 mutex_lock(&hotkey_mutex);
2685 hotkey_poll_setup(may_warn);
2686 mutex_unlock(&hotkey_mutex);
2687 }
2688
2689 /* call with hotkey_mutex held */
hotkey_poll_set_freq(unsigned int freq)2690 static void hotkey_poll_set_freq(unsigned int freq)
2691 {
2692 if (!freq)
2693 hotkey_poll_stop_sync();
2694
2695 hotkey_poll_freq = freq;
2696 }
2697
2698 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2699
hotkey_poll_setup(const bool __unused)2700 static void hotkey_poll_setup(const bool __unused)
2701 {
2702 }
2703
hotkey_poll_setup_safe(const bool __unused)2704 static void hotkey_poll_setup_safe(const bool __unused)
2705 {
2706 }
2707
2708 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2709
hotkey_inputdev_open(struct input_dev * dev)2710 static int hotkey_inputdev_open(struct input_dev *dev)
2711 {
2712 switch (tpacpi_lifecycle) {
2713 case TPACPI_LIFE_INIT:
2714 case TPACPI_LIFE_RUNNING:
2715 hotkey_poll_setup_safe(false);
2716 return 0;
2717 case TPACPI_LIFE_EXITING:
2718 return -EBUSY;
2719 }
2720
2721 /* Should only happen if tpacpi_lifecycle is corrupt */
2722 BUG();
2723 return -EBUSY;
2724 }
2725
hotkey_inputdev_close(struct input_dev * dev)2726 static void hotkey_inputdev_close(struct input_dev *dev)
2727 {
2728 /* disable hotkey polling when possible */
2729 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2730 !(hotkey_source_mask & hotkey_driver_mask))
2731 hotkey_poll_setup_safe(false);
2732 }
2733
2734 /* sysfs hotkey enable ------------------------------------------------- */
hotkey_enable_show(struct device * dev,struct device_attribute * attr,char * buf)2735 static ssize_t hotkey_enable_show(struct device *dev,
2736 struct device_attribute *attr,
2737 char *buf)
2738 {
2739 int res, status;
2740
2741 printk_deprecated_attribute("hotkey_enable",
2742 "Hotkey reporting is always enabled");
2743
2744 res = hotkey_status_get(&status);
2745 if (res)
2746 return res;
2747
2748 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2749 }
2750
hotkey_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2751 static ssize_t hotkey_enable_store(struct device *dev,
2752 struct device_attribute *attr,
2753 const char *buf, size_t count)
2754 {
2755 unsigned long t;
2756
2757 printk_deprecated_attribute("hotkey_enable",
2758 "Hotkeys can be disabled through hotkey_mask");
2759
2760 if (parse_strtoul(buf, 1, &t))
2761 return -EINVAL;
2762
2763 if (t == 0)
2764 return -EPERM;
2765
2766 return count;
2767 }
2768
2769 static DEVICE_ATTR_RW(hotkey_enable);
2770
2771 /* sysfs hotkey mask --------------------------------------------------- */
hotkey_mask_show(struct device * dev,struct device_attribute * attr,char * buf)2772 static ssize_t hotkey_mask_show(struct device *dev,
2773 struct device_attribute *attr,
2774 char *buf)
2775 {
2776 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2777 }
2778
hotkey_mask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2779 static ssize_t hotkey_mask_store(struct device *dev,
2780 struct device_attribute *attr,
2781 const char *buf, size_t count)
2782 {
2783 unsigned long t;
2784 int res;
2785
2786 if (parse_strtoul(buf, 0xffffffffUL, &t))
2787 return -EINVAL;
2788
2789 if (mutex_lock_killable(&hotkey_mutex))
2790 return -ERESTARTSYS;
2791
2792 res = hotkey_user_mask_set(t);
2793
2794 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2795 hotkey_poll_setup(true);
2796 #endif
2797
2798 mutex_unlock(&hotkey_mutex);
2799
2800 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2801
2802 return (res) ? res : count;
2803 }
2804
2805 static DEVICE_ATTR_RW(hotkey_mask);
2806
2807 /* sysfs hotkey bios_enabled ------------------------------------------- */
hotkey_bios_enabled_show(struct device * dev,struct device_attribute * attr,char * buf)2808 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2809 struct device_attribute *attr,
2810 char *buf)
2811 {
2812 return sprintf(buf, "0\n");
2813 }
2814
2815 static DEVICE_ATTR_RO(hotkey_bios_enabled);
2816
2817 /* sysfs hotkey bios_mask ---------------------------------------------- */
hotkey_bios_mask_show(struct device * dev,struct device_attribute * attr,char * buf)2818 static ssize_t hotkey_bios_mask_show(struct device *dev,
2819 struct device_attribute *attr,
2820 char *buf)
2821 {
2822 printk_deprecated_attribute("hotkey_bios_mask",
2823 "This attribute is useless.");
2824 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2825 }
2826
2827 static DEVICE_ATTR_RO(hotkey_bios_mask);
2828
2829 /* sysfs hotkey all_mask ----------------------------------------------- */
hotkey_all_mask_show(struct device * dev,struct device_attribute * attr,char * buf)2830 static ssize_t hotkey_all_mask_show(struct device *dev,
2831 struct device_attribute *attr,
2832 char *buf)
2833 {
2834 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2835 hotkey_all_mask | hotkey_source_mask);
2836 }
2837
2838 static DEVICE_ATTR_RO(hotkey_all_mask);
2839
2840 /* sysfs hotkey all_mask ----------------------------------------------- */
hotkey_adaptive_all_mask_show(struct device * dev,struct device_attribute * attr,char * buf)2841 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev,
2842 struct device_attribute *attr,
2843 char *buf)
2844 {
2845 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2846 hotkey_adaptive_all_mask | hotkey_source_mask);
2847 }
2848
2849 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask);
2850
2851 /* sysfs hotkey recommended_mask --------------------------------------- */
hotkey_recommended_mask_show(struct device * dev,struct device_attribute * attr,char * buf)2852 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2853 struct device_attribute *attr,
2854 char *buf)
2855 {
2856 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2857 (hotkey_all_mask | hotkey_source_mask)
2858 & ~hotkey_reserved_mask);
2859 }
2860
2861 static DEVICE_ATTR_RO(hotkey_recommended_mask);
2862
2863 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2864
2865 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
hotkey_source_mask_show(struct device * dev,struct device_attribute * attr,char * buf)2866 static ssize_t hotkey_source_mask_show(struct device *dev,
2867 struct device_attribute *attr,
2868 char *buf)
2869 {
2870 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2871 }
2872
hotkey_source_mask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2873 static ssize_t hotkey_source_mask_store(struct device *dev,
2874 struct device_attribute *attr,
2875 const char *buf, size_t count)
2876 {
2877 unsigned long t;
2878 u32 r_ev;
2879 int rc;
2880
2881 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2882 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2883 return -EINVAL;
2884
2885 if (mutex_lock_killable(&hotkey_mutex))
2886 return -ERESTARTSYS;
2887
2888 HOTKEY_CONFIG_CRITICAL_START
2889 hotkey_source_mask = t;
2890 HOTKEY_CONFIG_CRITICAL_END
2891
2892 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2893 ~hotkey_source_mask);
2894 hotkey_poll_setup(true);
2895
2896 /* check if events needed by the driver got disabled */
2897 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2898 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2899
2900 mutex_unlock(&hotkey_mutex);
2901
2902 if (rc < 0)
2903 pr_err("hotkey_source_mask: failed to update the firmware event mask!\n");
2904
2905 if (r_ev)
2906 pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n",
2907 r_ev);
2908
2909 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2910
2911 return (rc < 0) ? rc : count;
2912 }
2913
2914 static DEVICE_ATTR_RW(hotkey_source_mask);
2915
2916 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
hotkey_poll_freq_show(struct device * dev,struct device_attribute * attr,char * buf)2917 static ssize_t hotkey_poll_freq_show(struct device *dev,
2918 struct device_attribute *attr,
2919 char *buf)
2920 {
2921 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2922 }
2923
hotkey_poll_freq_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2924 static ssize_t hotkey_poll_freq_store(struct device *dev,
2925 struct device_attribute *attr,
2926 const char *buf, size_t count)
2927 {
2928 unsigned long t;
2929
2930 if (parse_strtoul(buf, 25, &t))
2931 return -EINVAL;
2932
2933 if (mutex_lock_killable(&hotkey_mutex))
2934 return -ERESTARTSYS;
2935
2936 hotkey_poll_set_freq(t);
2937 hotkey_poll_setup(true);
2938
2939 mutex_unlock(&hotkey_mutex);
2940
2941 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2942
2943 return count;
2944 }
2945
2946 static DEVICE_ATTR_RW(hotkey_poll_freq);
2947
2948 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2949
2950 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
hotkey_radio_sw_show(struct device * dev,struct device_attribute * attr,char * buf)2951 static ssize_t hotkey_radio_sw_show(struct device *dev,
2952 struct device_attribute *attr,
2953 char *buf)
2954 {
2955 int res;
2956 res = hotkey_get_wlsw();
2957 if (res < 0)
2958 return res;
2959
2960 /* Opportunistic update */
2961 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2962
2963 return snprintf(buf, PAGE_SIZE, "%d\n",
2964 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2965 }
2966
2967 static DEVICE_ATTR_RO(hotkey_radio_sw);
2968
hotkey_radio_sw_notify_change(void)2969 static void hotkey_radio_sw_notify_change(void)
2970 {
2971 if (tp_features.hotkey_wlsw)
2972 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2973 "hotkey_radio_sw");
2974 }
2975
2976 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
hotkey_tablet_mode_show(struct device * dev,struct device_attribute * attr,char * buf)2977 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2978 struct device_attribute *attr,
2979 char *buf)
2980 {
2981 int res, s;
2982 res = hotkey_get_tablet_mode(&s);
2983 if (res < 0)
2984 return res;
2985
2986 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2987 }
2988
2989 static DEVICE_ATTR_RO(hotkey_tablet_mode);
2990
hotkey_tablet_mode_notify_change(void)2991 static void hotkey_tablet_mode_notify_change(void)
2992 {
2993 if (tp_features.hotkey_tablet)
2994 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2995 "hotkey_tablet_mode");
2996 }
2997
2998 /* sysfs wakeup reason (pollable) -------------------------------------- */
hotkey_wakeup_reason_show(struct device * dev,struct device_attribute * attr,char * buf)2999 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
3000 struct device_attribute *attr,
3001 char *buf)
3002 {
3003 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
3004 }
3005
3006 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
3007
hotkey_wakeup_reason_notify_change(void)3008 static void hotkey_wakeup_reason_notify_change(void)
3009 {
3010 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
3011 "wakeup_reason");
3012 }
3013
3014 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
hotkey_wakeup_hotunplug_complete_show(struct device * dev,struct device_attribute * attr,char * buf)3015 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
3016 struct device_attribute *attr,
3017 char *buf)
3018 {
3019 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
3020 }
3021
3022 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO,
3023 hotkey_wakeup_hotunplug_complete_show, NULL);
3024
hotkey_wakeup_hotunplug_complete_notify_change(void)3025 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
3026 {
3027 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
3028 "wakeup_hotunplug_complete");
3029 }
3030
3031 /* sysfs adaptive kbd mode --------------------------------------------- */
3032
3033 static int adaptive_keyboard_get_mode(void);
3034 static int adaptive_keyboard_set_mode(int new_mode);
3035
3036 enum ADAPTIVE_KEY_MODE {
3037 HOME_MODE,
3038 WEB_BROWSER_MODE,
3039 WEB_CONFERENCE_MODE,
3040 FUNCTION_MODE,
3041 LAYFLAT_MODE
3042 };
3043
adaptive_kbd_mode_show(struct device * dev,struct device_attribute * attr,char * buf)3044 static ssize_t adaptive_kbd_mode_show(struct device *dev,
3045 struct device_attribute *attr,
3046 char *buf)
3047 {
3048 int current_mode;
3049
3050 current_mode = adaptive_keyboard_get_mode();
3051 if (current_mode < 0)
3052 return current_mode;
3053
3054 return snprintf(buf, PAGE_SIZE, "%d\n", current_mode);
3055 }
3056
adaptive_kbd_mode_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)3057 static ssize_t adaptive_kbd_mode_store(struct device *dev,
3058 struct device_attribute *attr,
3059 const char *buf, size_t count)
3060 {
3061 unsigned long t;
3062 int res;
3063
3064 if (parse_strtoul(buf, LAYFLAT_MODE, &t))
3065 return -EINVAL;
3066
3067 res = adaptive_keyboard_set_mode(t);
3068 return (res < 0) ? res : count;
3069 }
3070
3071 static DEVICE_ATTR_RW(adaptive_kbd_mode);
3072
3073 static struct attribute *adaptive_kbd_attributes[] = {
3074 &dev_attr_adaptive_kbd_mode.attr,
3075 NULL
3076 };
3077
3078 static const struct attribute_group adaptive_kbd_attr_group = {
3079 .attrs = adaptive_kbd_attributes,
3080 };
3081
3082 /* --------------------------------------------------------------------- */
3083
3084 static struct attribute *hotkey_attributes[] __initdata = {
3085 &dev_attr_hotkey_enable.attr,
3086 &dev_attr_hotkey_bios_enabled.attr,
3087 &dev_attr_hotkey_bios_mask.attr,
3088 &dev_attr_wakeup_reason.attr,
3089 &dev_attr_wakeup_hotunplug_complete.attr,
3090 &dev_attr_hotkey_mask.attr,
3091 &dev_attr_hotkey_all_mask.attr,
3092 &dev_attr_hotkey_adaptive_all_mask.attr,
3093 &dev_attr_hotkey_recommended_mask.attr,
3094 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3095 &dev_attr_hotkey_source_mask.attr,
3096 &dev_attr_hotkey_poll_freq.attr,
3097 #endif
3098 };
3099
3100 /*
3101 * Sync both the hw and sw blocking state of all switches
3102 */
tpacpi_send_radiosw_update(void)3103 static void tpacpi_send_radiosw_update(void)
3104 {
3105 int wlsw;
3106
3107 /*
3108 * We must sync all rfkill controllers *before* issuing any
3109 * rfkill input events, or we will race the rfkill core input
3110 * handler.
3111 *
3112 * tpacpi_inputdev_send_mutex works as a synchronization point
3113 * for the above.
3114 *
3115 * We optimize to avoid numerous calls to hotkey_get_wlsw.
3116 */
3117
3118 wlsw = hotkey_get_wlsw();
3119
3120 /* Sync hw blocking state first if it is hw-blocked */
3121 if (wlsw == TPACPI_RFK_RADIO_OFF)
3122 tpacpi_rfk_update_hwblock_state(true);
3123
3124 /* Sync sw blocking state */
3125 tpacpi_rfk_update_swstate_all();
3126
3127 /* Sync hw blocking state last if it is hw-unblocked */
3128 if (wlsw == TPACPI_RFK_RADIO_ON)
3129 tpacpi_rfk_update_hwblock_state(false);
3130
3131 /* Issue rfkill input event for WLSW switch */
3132 if (!(wlsw < 0)) {
3133 mutex_lock(&tpacpi_inputdev_send_mutex);
3134
3135 input_report_switch(tpacpi_inputdev,
3136 SW_RFKILL_ALL, (wlsw > 0));
3137 input_sync(tpacpi_inputdev);
3138
3139 mutex_unlock(&tpacpi_inputdev_send_mutex);
3140 }
3141
3142 /*
3143 * this can be unconditional, as we will poll state again
3144 * if userspace uses the notify to read data
3145 */
3146 hotkey_radio_sw_notify_change();
3147 }
3148
hotkey_exit(void)3149 static void hotkey_exit(void)
3150 {
3151 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3152 mutex_lock(&hotkey_mutex);
3153 hotkey_poll_stop_sync();
3154 mutex_unlock(&hotkey_mutex);
3155 #endif
3156
3157 if (hotkey_dev_attributes)
3158 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3159
3160 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3161 "restoring original HKEY status and mask\n");
3162 /* yes, there is a bitwise or below, we want the
3163 * functions to be called even if one of them fail */
3164 if (((tp_features.hotkey_mask &&
3165 hotkey_mask_set(hotkey_orig_mask)) |
3166 hotkey_status_set(false)) != 0)
3167 pr_err("failed to restore hot key mask to BIOS defaults\n");
3168 }
3169
hotkey_unmap(const unsigned int scancode)3170 static void __init hotkey_unmap(const unsigned int scancode)
3171 {
3172 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3173 clear_bit(hotkey_keycode_map[scancode],
3174 tpacpi_inputdev->keybit);
3175 hotkey_keycode_map[scancode] = KEY_RESERVED;
3176 }
3177 }
3178
3179 /*
3180 * HKEY quirks:
3181 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3182 */
3183
3184 #define TPACPI_HK_Q_INIMASK 0x0001
3185
3186 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3187 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3188 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3189 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3190 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3191 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3192 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3193 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3194 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3195 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3196 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3197 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3198 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3199 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3200 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3201 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3202 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3203 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3204 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3205 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3206 };
3207
3208 typedef u16 tpacpi_keymap_entry_t;
3209 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3210
hotkey_init_tablet_mode(void)3211 static int hotkey_init_tablet_mode(void)
3212 {
3213 int in_tablet_mode = 0, res;
3214 char *type = NULL;
3215
3216 if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) {
3217 int has_tablet_mode;
3218
3219 in_tablet_mode = hotkey_gmms_get_tablet_mode(res,
3220 &has_tablet_mode);
3221 /*
3222 * The Yoga 11e series has 2 accelerometers described by a
3223 * BOSC0200 ACPI node. This setup relies on a Windows service
3224 * which calls special ACPI methods on this node to report
3225 * the laptop/tent/tablet mode to the EC. The bmc150 iio driver
3226 * does not support this, so skip the hotkey on these models.
3227 */
3228 if (has_tablet_mode && !acpi_dev_present("BOSC0200", "1", -1))
3229 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS;
3230 type = "GMMS";
3231 } else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) {
3232 /* For X41t, X60t, X61t Tablets... */
3233 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG;
3234 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK);
3235 type = "MHKG";
3236 }
3237
3238 if (!tp_features.hotkey_tablet)
3239 return 0;
3240
3241 pr_info("Tablet mode switch found (type: %s), currently in %s mode\n",
3242 type, in_tablet_mode ? "tablet" : "laptop");
3243
3244 res = add_to_attr_set(hotkey_dev_attributes,
3245 &dev_attr_hotkey_tablet_mode.attr);
3246 if (res)
3247 return -1;
3248
3249 return in_tablet_mode;
3250 }
3251
hotkey_init(struct ibm_init_struct * iibm)3252 static int __init hotkey_init(struct ibm_init_struct *iibm)
3253 {
3254 /* Requirements for changing the default keymaps:
3255 *
3256 * 1. Many of the keys are mapped to KEY_RESERVED for very
3257 * good reasons. Do not change them unless you have deep
3258 * knowledge on the IBM and Lenovo ThinkPad firmware for
3259 * the various ThinkPad models. The driver behaves
3260 * differently for KEY_RESERVED: such keys have their
3261 * hot key mask *unset* in mask_recommended, and also
3262 * in the initial hot key mask programmed into the
3263 * firmware at driver load time, which means the firm-
3264 * ware may react very differently if you change them to
3265 * something else;
3266 *
3267 * 2. You must be subscribed to the linux-thinkpad and
3268 * ibm-acpi-devel mailing lists, and you should read the
3269 * list archives since 2007 if you want to change the
3270 * keymaps. This requirement exists so that you will
3271 * know the past history of problems with the thinkpad-
3272 * acpi driver keymaps, and also that you will be
3273 * listening to any bug reports;
3274 *
3275 * 3. Do not send thinkpad-acpi specific patches directly to
3276 * for merging, *ever*. Send them to the linux-acpi
3277 * mailinglist for comments. Merging is to be done only
3278 * through acpi-test and the ACPI maintainer.
3279 *
3280 * If the above is too much to ask, don't change the keymap.
3281 * Ask the thinkpad-acpi maintainer to do it, instead.
3282 */
3283
3284 enum keymap_index {
3285 TPACPI_KEYMAP_IBM_GENERIC = 0,
3286 TPACPI_KEYMAP_LENOVO_GENERIC,
3287 };
3288
3289 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3290 /* Generic keymap for IBM ThinkPads */
3291 [TPACPI_KEYMAP_IBM_GENERIC] = {
3292 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3293 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP,
3294 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3295 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3296
3297 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3298 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3299 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3300 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3301
3302 /* brightness: firmware always reacts to them */
3303 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3304 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3305
3306 /* Thinklight: firmware always react to it */
3307 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3308
3309 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3310 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3311
3312 /* Volume: firmware always react to it and reprograms
3313 * the built-in *extra* mixer. Never map it to control
3314 * another mixer by default. */
3315 KEY_RESERVED, /* 0x14: VOLUME UP */
3316 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3317 KEY_RESERVED, /* 0x16: MUTE */
3318
3319 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3320
3321 /* (assignments unknown, please report if found) */
3322 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3323 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3324
3325 /* No assignments, only used for Adaptive keyboards. */
3326 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3327 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3328 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3329 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3330 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3331
3332 /* No assignment, used for newer Lenovo models */
3333 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3334 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3335 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3336 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3337 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3338 KEY_UNKNOWN, KEY_UNKNOWN
3339
3340 },
3341
3342 /* Generic keymap for Lenovo ThinkPads */
3343 [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3344 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3345 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3346 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3347 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3348
3349 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3350 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3351 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3352 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3353
3354 /* These should be enabled --only-- when ACPI video
3355 * is disabled (i.e. in "vendor" mode), and are handled
3356 * in a special way by the init code */
3357 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3358 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3359
3360 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3361
3362 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3363 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3364
3365 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3366 * react to it and reprograms the built-in *extra* mixer.
3367 * Never map it to control another mixer by default.
3368 *
3369 * T60?, T61, R60?, R61: firmware and EC tries to send
3370 * these over the regular keyboard, so these are no-ops,
3371 * but there are still weird bugs re. MUTE, so do not
3372 * change unless you get test reports from all Lenovo
3373 * models. May cause the BIOS to interfere with the
3374 * HDA mixer.
3375 */
3376 KEY_RESERVED, /* 0x14: VOLUME UP */
3377 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3378 KEY_RESERVED, /* 0x16: MUTE */
3379
3380 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3381
3382 /* (assignments unknown, please report if found) */
3383 KEY_UNKNOWN, KEY_UNKNOWN,
3384
3385 /*
3386 * The mic mute button only sends 0x1a. It does not
3387 * automatically mute the mic or change the mute light.
3388 */
3389 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */
3390
3391 /* (assignments unknown, please report if found) */
3392 KEY_UNKNOWN,
3393
3394 /* Extra keys in use since the X240 / T440 / T540 */
3395 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE,
3396
3397 /*
3398 * These are the adaptive keyboard keycodes for Carbon X1 2014.
3399 * The first item in this list is the Mute button which is
3400 * emitted with 0x103 through
3401 * adaptive_keyboard_hotkey_notify_hotkey() when the sound
3402 * symbol is held.
3403 * We'll need to offset those by 0x20.
3404 */
3405 KEY_RESERVED, /* Mute held, 0x103 */
3406 KEY_BRIGHTNESS_MIN, /* Backlight off */
3407 KEY_RESERVED, /* Clipping tool */
3408 KEY_RESERVED, /* Cloud */
3409 KEY_RESERVED,
3410 KEY_VOICECOMMAND, /* Voice */
3411 KEY_RESERVED,
3412 KEY_RESERVED, /* Gestures */
3413 KEY_RESERVED,
3414 KEY_RESERVED,
3415 KEY_RESERVED,
3416 KEY_CONFIG, /* Settings */
3417 KEY_RESERVED, /* New tab */
3418 KEY_REFRESH, /* Reload */
3419 KEY_BACK, /* Back */
3420 KEY_RESERVED, /* Microphone down */
3421 KEY_RESERVED, /* Microphone up */
3422 KEY_RESERVED, /* Microphone cancellation */
3423 KEY_RESERVED, /* Camera mode */
3424 KEY_RESERVED, /* Rotate display, 0x116 */
3425
3426 /*
3427 * These are found in 2017 models (e.g. T470s, X270).
3428 * The lowest known value is 0x311, which according to
3429 * the manual should launch a user defined favorite
3430 * application.
3431 *
3432 * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START,
3433 * corresponding to 0x34.
3434 */
3435
3436 /* (assignments unknown, please report if found) */
3437 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3438 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3439 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3440 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3441 KEY_UNKNOWN,
3442
3443 KEY_BOOKMARKS, /* Favorite app, 0x311 */
3444 KEY_SELECTIVE_SCREENSHOT, /* Clipping tool */
3445 KEY_CALC, /* Calculator (above numpad, P52) */
3446 KEY_BLUETOOTH, /* Bluetooth */
3447 KEY_KEYBOARD, /* Keyboard, 0x315 */
3448 KEY_FN_RIGHT_SHIFT, /* Fn + right Shift */
3449 KEY_NOTIFICATION_CENTER, /* Notification Center */
3450 KEY_PICKUP_PHONE, /* Answer incoming call */
3451 KEY_HANGUP_PHONE, /* Decline incoming call */
3452 },
3453 };
3454
3455 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3456 /* Generic maps (fallback) */
3457 {
3458 .vendor = PCI_VENDOR_ID_IBM,
3459 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3460 .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3461 },
3462 {
3463 .vendor = PCI_VENDOR_ID_LENOVO,
3464 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3465 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3466 },
3467 };
3468
3469 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t)
3470 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t)
3471
3472 int res, i;
3473 int status;
3474 int hkeyv;
3475 bool radiosw_state = false;
3476 bool tabletsw_state = false;
3477
3478 unsigned long quirks;
3479 unsigned long keymap_id;
3480
3481 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3482 "initializing hotkey subdriver\n");
3483
3484 BUG_ON(!tpacpi_inputdev);
3485 BUG_ON(tpacpi_inputdev->open != NULL ||
3486 tpacpi_inputdev->close != NULL);
3487
3488 TPACPI_ACPIHANDLE_INIT(hkey);
3489 mutex_init(&hotkey_mutex);
3490
3491 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3492 mutex_init(&hotkey_thread_data_mutex);
3493 #endif
3494
3495 /* hotkey not supported on 570 */
3496 tp_features.hotkey = hkey_handle != NULL;
3497
3498 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3499 "hotkeys are %s\n",
3500 str_supported(tp_features.hotkey));
3501
3502 if (!tp_features.hotkey)
3503 return 1;
3504
3505 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3506 ARRAY_SIZE(tpacpi_hotkey_qtable));
3507
3508 tpacpi_disable_brightness_delay();
3509
3510 /* MUST have enough space for all attributes to be added to
3511 * hotkey_dev_attributes */
3512 hotkey_dev_attributes = create_attr_set(
3513 ARRAY_SIZE(hotkey_attributes) + 2,
3514 NULL);
3515 if (!hotkey_dev_attributes)
3516 return -ENOMEM;
3517 res = add_many_to_attr_set(hotkey_dev_attributes,
3518 hotkey_attributes,
3519 ARRAY_SIZE(hotkey_attributes));
3520 if (res)
3521 goto err_exit;
3522
3523 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3524 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3525 for HKEY interface version 0x100 */
3526 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3527 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3528 "firmware HKEY interface version: 0x%x\n",
3529 hkeyv);
3530
3531 switch (hkeyv >> 8) {
3532 case 1:
3533 /*
3534 * MHKV 0x100 in A31, R40, R40e,
3535 * T4x, X31, and later
3536 */
3537
3538 /* Paranoia check AND init hotkey_all_mask */
3539 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3540 "MHKA", "qd")) {
3541 pr_err("missing MHKA handler, please report this to %s\n",
3542 TPACPI_MAIL);
3543 /* Fallback: pre-init for FN+F3,F4,F12 */
3544 hotkey_all_mask = 0x080cU;
3545 } else {
3546 tp_features.hotkey_mask = 1;
3547 }
3548 break;
3549
3550 case 2:
3551 /*
3552 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016)
3553 */
3554
3555 /* Paranoia check AND init hotkey_all_mask */
3556 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3557 "MHKA", "dd", 1)) {
3558 pr_err("missing MHKA handler, please report this to %s\n",
3559 TPACPI_MAIL);
3560 /* Fallback: pre-init for FN+F3,F4,F12 */
3561 hotkey_all_mask = 0x080cU;
3562 } else {
3563 tp_features.hotkey_mask = 1;
3564 }
3565
3566 /*
3567 * Check if we have an adaptive keyboard, like on the
3568 * Lenovo Carbon X1 2014 (2nd Gen).
3569 */
3570 if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask,
3571 "MHKA", "dd", 2)) {
3572 if (hotkey_adaptive_all_mask != 0) {
3573 tp_features.has_adaptive_kbd = true;
3574 res = sysfs_create_group(
3575 &tpacpi_pdev->dev.kobj,
3576 &adaptive_kbd_attr_group);
3577 if (res)
3578 goto err_exit;
3579 }
3580 } else {
3581 tp_features.has_adaptive_kbd = false;
3582 hotkey_adaptive_all_mask = 0x0U;
3583 }
3584 break;
3585
3586 default:
3587 pr_err("unknown version of the HKEY interface: 0x%x\n",
3588 hkeyv);
3589 pr_err("please report this to %s\n", TPACPI_MAIL);
3590 break;
3591 }
3592 }
3593
3594 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3595 "hotkey masks are %s\n",
3596 str_supported(tp_features.hotkey_mask));
3597
3598 /* Init hotkey_all_mask if not initialized yet */
3599 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3600 (quirks & TPACPI_HK_Q_INIMASK))
3601 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3602
3603 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3604 if (tp_features.hotkey_mask) {
3605 /* hotkey_source_mask *must* be zero for
3606 * the first hotkey_mask_get to return hotkey_orig_mask */
3607 res = hotkey_mask_get();
3608 if (res)
3609 goto err_exit;
3610
3611 hotkey_orig_mask = hotkey_acpi_mask;
3612 } else {
3613 hotkey_orig_mask = hotkey_all_mask;
3614 hotkey_acpi_mask = hotkey_all_mask;
3615 }
3616
3617 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3618 if (dbg_wlswemul) {
3619 tp_features.hotkey_wlsw = 1;
3620 radiosw_state = !!tpacpi_wlsw_emulstate;
3621 pr_info("radio switch emulation enabled\n");
3622 } else
3623 #endif
3624 /* Not all thinkpads have a hardware radio switch */
3625 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3626 tp_features.hotkey_wlsw = 1;
3627 radiosw_state = !!status;
3628 pr_info("radio switch found; radios are %s\n",
3629 enabled(status, 0));
3630 }
3631 if (tp_features.hotkey_wlsw)
3632 res = add_to_attr_set(hotkey_dev_attributes,
3633 &dev_attr_hotkey_radio_sw.attr);
3634
3635 res = hotkey_init_tablet_mode();
3636 if (res < 0)
3637 goto err_exit;
3638
3639 tabletsw_state = res;
3640
3641 res = register_attr_set_with_sysfs(hotkey_dev_attributes,
3642 &tpacpi_pdev->dev.kobj);
3643 if (res)
3644 goto err_exit;
3645
3646 /* Set up key map */
3647 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3648 ARRAY_SIZE(tpacpi_keymap_qtable));
3649 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3650 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3651 "using keymap number %lu\n", keymap_id);
3652
3653 hotkey_keycode_map = kmemdup(&tpacpi_keymaps[keymap_id],
3654 TPACPI_HOTKEY_MAP_SIZE, GFP_KERNEL);
3655 if (!hotkey_keycode_map) {
3656 pr_err("failed to allocate memory for key map\n");
3657 res = -ENOMEM;
3658 goto err_exit;
3659 }
3660
3661 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3662 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3663 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3664 tpacpi_inputdev->keycode = hotkey_keycode_map;
3665 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3666 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3667 input_set_capability(tpacpi_inputdev, EV_KEY,
3668 hotkey_keycode_map[i]);
3669 } else {
3670 if (i < sizeof(hotkey_reserved_mask)*8)
3671 hotkey_reserved_mask |= 1 << i;
3672 }
3673 }
3674
3675 if (tp_features.hotkey_wlsw) {
3676 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3677 input_report_switch(tpacpi_inputdev,
3678 SW_RFKILL_ALL, radiosw_state);
3679 }
3680 if (tp_features.hotkey_tablet) {
3681 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3682 input_report_switch(tpacpi_inputdev,
3683 SW_TABLET_MODE, tabletsw_state);
3684 }
3685
3686 /* Do not issue duplicate brightness change events to
3687 * userspace. tpacpi_detect_brightness_capabilities() must have
3688 * been called before this point */
3689 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
3690 pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n");
3691 pr_notice("Disabling thinkpad-acpi brightness events by default...\n");
3692
3693 /* Disable brightness up/down on Lenovo thinkpads when
3694 * ACPI is handling them, otherwise it is plain impossible
3695 * for userspace to do something even remotely sane */
3696 hotkey_reserved_mask |=
3697 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3698 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3699 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3700 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3701 }
3702
3703 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3704 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3705 & ~hotkey_all_mask
3706 & ~hotkey_reserved_mask;
3707
3708 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3709 "hotkey source mask 0x%08x, polling freq %u\n",
3710 hotkey_source_mask, hotkey_poll_freq);
3711 #endif
3712
3713 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3714 "enabling firmware HKEY event interface...\n");
3715 res = hotkey_status_set(true);
3716 if (res) {
3717 hotkey_exit();
3718 return res;
3719 }
3720 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3721 | hotkey_driver_mask)
3722 & ~hotkey_source_mask);
3723 if (res < 0 && res != -ENXIO) {
3724 hotkey_exit();
3725 return res;
3726 }
3727 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3728 & ~hotkey_reserved_mask;
3729 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3730 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3731 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3732
3733 tpacpi_inputdev->open = &hotkey_inputdev_open;
3734 tpacpi_inputdev->close = &hotkey_inputdev_close;
3735
3736 hotkey_poll_setup_safe(true);
3737
3738 return 0;
3739
3740 err_exit:
3741 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3742 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3743 &adaptive_kbd_attr_group);
3744
3745 hotkey_dev_attributes = NULL;
3746
3747 return (res < 0) ? res : 1;
3748 }
3749
3750 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser
3751 * mode, Web conference mode, Function mode and Lay-flat mode.
3752 * We support Home mode and Function mode currently.
3753 *
3754 * Will consider support rest of modes in future.
3755 *
3756 */
3757 static const int adaptive_keyboard_modes[] = {
3758 HOME_MODE,
3759 /* WEB_BROWSER_MODE = 2,
3760 WEB_CONFERENCE_MODE = 3, */
3761 FUNCTION_MODE
3762 };
3763
3764 #define DFR_CHANGE_ROW 0x101
3765 #define DFR_SHOW_QUICKVIEW_ROW 0x102
3766 #define FIRST_ADAPTIVE_KEY 0x103
3767
3768 /* press Fn key a while second, it will switch to Function Mode. Then
3769 * release Fn key, previous mode be restored.
3770 */
3771 static bool adaptive_keyboard_mode_is_saved;
3772 static int adaptive_keyboard_prev_mode;
3773
adaptive_keyboard_get_mode(void)3774 static int adaptive_keyboard_get_mode(void)
3775 {
3776 int mode = 0;
3777
3778 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) {
3779 pr_err("Cannot read adaptive keyboard mode\n");
3780 return -EIO;
3781 }
3782
3783 return mode;
3784 }
3785
adaptive_keyboard_set_mode(int new_mode)3786 static int adaptive_keyboard_set_mode(int new_mode)
3787 {
3788 if (new_mode < 0 ||
3789 new_mode > LAYFLAT_MODE)
3790 return -EINVAL;
3791
3792 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) {
3793 pr_err("Cannot set adaptive keyboard mode\n");
3794 return -EIO;
3795 }
3796
3797 return 0;
3798 }
3799
adaptive_keyboard_get_next_mode(int mode)3800 static int adaptive_keyboard_get_next_mode(int mode)
3801 {
3802 size_t i;
3803 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1;
3804
3805 for (i = 0; i <= max_mode; i++) {
3806 if (adaptive_keyboard_modes[i] == mode)
3807 break;
3808 }
3809
3810 if (i >= max_mode)
3811 i = 0;
3812 else
3813 i++;
3814
3815 return adaptive_keyboard_modes[i];
3816 }
3817
adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)3818 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
3819 {
3820 int current_mode = 0;
3821 int new_mode = 0;
3822 int keycode;
3823
3824 switch (scancode) {
3825 case DFR_CHANGE_ROW:
3826 if (adaptive_keyboard_mode_is_saved) {
3827 new_mode = adaptive_keyboard_prev_mode;
3828 adaptive_keyboard_mode_is_saved = false;
3829 } else {
3830 current_mode = adaptive_keyboard_get_mode();
3831 if (current_mode < 0)
3832 return false;
3833 new_mode = adaptive_keyboard_get_next_mode(
3834 current_mode);
3835 }
3836
3837 if (adaptive_keyboard_set_mode(new_mode) < 0)
3838 return false;
3839
3840 return true;
3841
3842 case DFR_SHOW_QUICKVIEW_ROW:
3843 current_mode = adaptive_keyboard_get_mode();
3844 if (current_mode < 0)
3845 return false;
3846
3847 adaptive_keyboard_prev_mode = current_mode;
3848 adaptive_keyboard_mode_is_saved = true;
3849
3850 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0)
3851 return false;
3852 return true;
3853
3854 default:
3855 if (scancode < FIRST_ADAPTIVE_KEY ||
3856 scancode >= FIRST_ADAPTIVE_KEY +
3857 TP_ACPI_HOTKEYSCAN_EXTENDED_START -
3858 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3859 pr_info("Unhandled adaptive keyboard key: 0x%x\n",
3860 scancode);
3861 return false;
3862 }
3863 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY +
3864 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START];
3865 if (keycode != KEY_RESERVED) {
3866 mutex_lock(&tpacpi_inputdev_send_mutex);
3867
3868 input_report_key(tpacpi_inputdev, keycode, 1);
3869 input_sync(tpacpi_inputdev);
3870
3871 input_report_key(tpacpi_inputdev, keycode, 0);
3872 input_sync(tpacpi_inputdev);
3873
3874 mutex_unlock(&tpacpi_inputdev_send_mutex);
3875 }
3876 return true;
3877 }
3878 }
3879
hotkey_notify_hotkey(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3880 static bool hotkey_notify_hotkey(const u32 hkey,
3881 bool *send_acpi_ev,
3882 bool *ignore_acpi_ev)
3883 {
3884 /* 0x1000-0x1FFF: key presses */
3885 unsigned int scancode = hkey & 0xfff;
3886 *send_acpi_ev = true;
3887 *ignore_acpi_ev = false;
3888
3889 /*
3890 * Original events are in the 0x10XX range, the adaptive keyboard
3891 * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017
3892 * models, additional keys are emitted through 0x13XX.
3893 */
3894 switch ((hkey >> 8) & 0xf) {
3895 case 0:
3896 if (scancode > 0 &&
3897 scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3898 /* HKEY event 0x1001 is scancode 0x00 */
3899 scancode--;
3900 if (!(hotkey_source_mask & (1 << scancode))) {
3901 tpacpi_input_send_key_masked(scancode);
3902 *send_acpi_ev = false;
3903 } else {
3904 *ignore_acpi_ev = true;
3905 }
3906 return true;
3907 }
3908 break;
3909
3910 case 1:
3911 return adaptive_keyboard_hotkey_notify_hotkey(scancode);
3912
3913 case 3:
3914 /* Extended keycodes start at 0x300 and our offset into the map
3915 * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode
3916 * will be positive, but might not be in the correct range.
3917 */
3918 scancode -= (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START);
3919 if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START &&
3920 scancode < TPACPI_HOTKEY_MAP_LEN) {
3921 tpacpi_input_send_key(scancode);
3922 return true;
3923 }
3924 break;
3925 }
3926
3927 return false;
3928 }
3929
hotkey_notify_wakeup(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3930 static bool hotkey_notify_wakeup(const u32 hkey,
3931 bool *send_acpi_ev,
3932 bool *ignore_acpi_ev)
3933 {
3934 /* 0x2000-0x2FFF: Wakeup reason */
3935 *send_acpi_ev = true;
3936 *ignore_acpi_ev = false;
3937
3938 switch (hkey) {
3939 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3940 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3941 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3942 *ignore_acpi_ev = true;
3943 break;
3944
3945 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3946 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3947 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3948 *ignore_acpi_ev = true;
3949 break;
3950
3951 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3952 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3953 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3954 /* how to auto-heal: */
3955 /* 2313: woke up from S3, go to S4/S5 */
3956 /* 2413: woke up from S4, go to S5 */
3957 break;
3958
3959 default:
3960 return false;
3961 }
3962
3963 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3964 pr_info("woke up due to a hot-unplug request...\n");
3965 hotkey_wakeup_reason_notify_change();
3966 }
3967 return true;
3968 }
3969
hotkey_notify_dockevent(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3970 static bool hotkey_notify_dockevent(const u32 hkey,
3971 bool *send_acpi_ev,
3972 bool *ignore_acpi_ev)
3973 {
3974 /* 0x4000-0x4FFF: dock-related events */
3975 *send_acpi_ev = true;
3976 *ignore_acpi_ev = false;
3977
3978 switch (hkey) {
3979 case TP_HKEY_EV_UNDOCK_ACK:
3980 /* ACPI undock operation completed after wakeup */
3981 hotkey_autosleep_ack = 1;
3982 pr_info("undocked\n");
3983 hotkey_wakeup_hotunplug_complete_notify_change();
3984 return true;
3985
3986 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3987 pr_info("docked into hotplug port replicator\n");
3988 return true;
3989 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3990 pr_info("undocked from hotplug port replicator\n");
3991 return true;
3992
3993 default:
3994 return false;
3995 }
3996 }
3997
hotkey_notify_usrevent(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3998 static bool hotkey_notify_usrevent(const u32 hkey,
3999 bool *send_acpi_ev,
4000 bool *ignore_acpi_ev)
4001 {
4002 /* 0x5000-0x5FFF: human interface helpers */
4003 *send_acpi_ev = true;
4004 *ignore_acpi_ev = false;
4005
4006 switch (hkey) {
4007 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
4008 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
4009 return true;
4010
4011 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
4012 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
4013 tpacpi_input_send_tabletsw();
4014 hotkey_tablet_mode_notify_change();
4015 *send_acpi_ev = false;
4016 return true;
4017
4018 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
4019 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
4020 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
4021 /* do not propagate these events */
4022 *ignore_acpi_ev = true;
4023 return true;
4024
4025 default:
4026 return false;
4027 }
4028 }
4029
4030 static void thermal_dump_all_sensors(void);
4031
hotkey_notify_6xxx(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)4032 static bool hotkey_notify_6xxx(const u32 hkey,
4033 bool *send_acpi_ev,
4034 bool *ignore_acpi_ev)
4035 {
4036 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
4037 *send_acpi_ev = true;
4038 *ignore_acpi_ev = false;
4039
4040 switch (hkey) {
4041 case TP_HKEY_EV_THM_TABLE_CHANGED:
4042 pr_debug("EC reports: Thermal Table has changed\n");
4043 /* recommended action: do nothing, we don't have
4044 * Lenovo ATM information */
4045 return true;
4046 case TP_HKEY_EV_THM_CSM_COMPLETED:
4047 pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n");
4048 /* Thermal event - pass on to event handler */
4049 tpacpi_driver_event(hkey);
4050 return true;
4051 case TP_HKEY_EV_THM_TRANSFM_CHANGED:
4052 pr_debug("EC reports: Thermal Transformation changed (GMTS)\n");
4053 /* recommended action: do nothing, we don't have
4054 * Lenovo ATM information */
4055 return true;
4056 case TP_HKEY_EV_ALARM_BAT_HOT:
4057 pr_crit("THERMAL ALARM: battery is too hot!\n");
4058 /* recommended action: warn user through gui */
4059 break;
4060 case TP_HKEY_EV_ALARM_BAT_XHOT:
4061 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
4062 /* recommended action: immediate sleep/hibernate */
4063 break;
4064 case TP_HKEY_EV_ALARM_SENSOR_HOT:
4065 pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n");
4066 /* recommended action: warn user through gui, that */
4067 /* some internal component is too hot */
4068 break;
4069 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
4070 pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n");
4071 /* recommended action: immediate sleep/hibernate */
4072 break;
4073 case TP_HKEY_EV_AC_CHANGED:
4074 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
4075 * AC status changed; can be triggered by plugging or
4076 * unplugging AC adapter, docking or undocking. */
4077
4078 fallthrough;
4079
4080 case TP_HKEY_EV_KEY_NUMLOCK:
4081 case TP_HKEY_EV_KEY_FN:
4082 /* key press events, we just ignore them as long as the EC
4083 * is still reporting them in the normal keyboard stream */
4084 *send_acpi_ev = false;
4085 *ignore_acpi_ev = true;
4086 return true;
4087
4088 case TP_HKEY_EV_KEY_FN_ESC:
4089 /* Get the media key status to foce the status LED to update */
4090 acpi_evalf(hkey_handle, NULL, "GMKS", "v");
4091 *send_acpi_ev = false;
4092 *ignore_acpi_ev = true;
4093 return true;
4094
4095 case TP_HKEY_EV_TABLET_CHANGED:
4096 tpacpi_input_send_tabletsw();
4097 hotkey_tablet_mode_notify_change();
4098 *send_acpi_ev = false;
4099 return true;
4100
4101 case TP_HKEY_EV_PALM_DETECTED:
4102 case TP_HKEY_EV_PALM_UNDETECTED:
4103 /* palm detected hovering the keyboard, forward to user-space
4104 * via netlink for consumption */
4105 return true;
4106
4107 default:
4108 /* report simply as unknown, no sensor dump */
4109 return false;
4110 }
4111
4112 thermal_dump_all_sensors();
4113 return true;
4114 }
4115
hotkey_notify(struct ibm_struct * ibm,u32 event)4116 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
4117 {
4118 u32 hkey;
4119 bool send_acpi_ev;
4120 bool ignore_acpi_ev;
4121 bool known_ev;
4122
4123 if (event != 0x80) {
4124 pr_err("unknown HKEY notification event %d\n", event);
4125 /* forward it to userspace, maybe it knows how to handle it */
4126 acpi_bus_generate_netlink_event(
4127 ibm->acpi->device->pnp.device_class,
4128 dev_name(&ibm->acpi->device->dev),
4129 event, 0);
4130 return;
4131 }
4132
4133 while (1) {
4134 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
4135 pr_err("failed to retrieve HKEY event\n");
4136 return;
4137 }
4138
4139 if (hkey == 0) {
4140 /* queue empty */
4141 return;
4142 }
4143
4144 send_acpi_ev = true;
4145 ignore_acpi_ev = false;
4146
4147 switch (hkey >> 12) {
4148 case 1:
4149 /* 0x1000-0x1FFF: key presses */
4150 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
4151 &ignore_acpi_ev);
4152 break;
4153 case 2:
4154 /* 0x2000-0x2FFF: Wakeup reason */
4155 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
4156 &ignore_acpi_ev);
4157 break;
4158 case 3:
4159 /* 0x3000-0x3FFF: bay-related wakeups */
4160 switch (hkey) {
4161 case TP_HKEY_EV_BAYEJ_ACK:
4162 hotkey_autosleep_ack = 1;
4163 pr_info("bay ejected\n");
4164 hotkey_wakeup_hotunplug_complete_notify_change();
4165 known_ev = true;
4166 break;
4167 case TP_HKEY_EV_OPTDRV_EJ:
4168 /* FIXME: kick libata if SATA link offline */
4169 known_ev = true;
4170 break;
4171 default:
4172 known_ev = false;
4173 }
4174 break;
4175 case 4:
4176 /* 0x4000-0x4FFF: dock-related events */
4177 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
4178 &ignore_acpi_ev);
4179 break;
4180 case 5:
4181 /* 0x5000-0x5FFF: human interface helpers */
4182 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
4183 &ignore_acpi_ev);
4184 break;
4185 case 6:
4186 /* 0x6000-0x6FFF: thermal alarms/notices and
4187 * keyboard events */
4188 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
4189 &ignore_acpi_ev);
4190 break;
4191 case 7:
4192 /* 0x7000-0x7FFF: misc */
4193 if (tp_features.hotkey_wlsw &&
4194 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
4195 tpacpi_send_radiosw_update();
4196 send_acpi_ev = 0;
4197 known_ev = true;
4198 break;
4199 }
4200 fallthrough; /* to default */
4201 default:
4202 known_ev = false;
4203 }
4204 if (!known_ev) {
4205 pr_notice("unhandled HKEY event 0x%04x\n", hkey);
4206 pr_notice("please report the conditions when this event happened to %s\n",
4207 TPACPI_MAIL);
4208 }
4209
4210 /* netlink events */
4211 if (!ignore_acpi_ev && send_acpi_ev) {
4212 acpi_bus_generate_netlink_event(
4213 ibm->acpi->device->pnp.device_class,
4214 dev_name(&ibm->acpi->device->dev),
4215 event, hkey);
4216 }
4217 }
4218 }
4219
hotkey_suspend(void)4220 static void hotkey_suspend(void)
4221 {
4222 /* Do these on suspend, we get the events on early resume! */
4223 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
4224 hotkey_autosleep_ack = 0;
4225
4226 /* save previous mode of adaptive keyboard of X1 Carbon */
4227 if (tp_features.has_adaptive_kbd) {
4228 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode,
4229 "GTRW", "dd", 0)) {
4230 pr_err("Cannot read adaptive keyboard mode.\n");
4231 }
4232 }
4233 }
4234
hotkey_resume(void)4235 static void hotkey_resume(void)
4236 {
4237 tpacpi_disable_brightness_delay();
4238
4239 if (hotkey_status_set(true) < 0 ||
4240 hotkey_mask_set(hotkey_acpi_mask) < 0)
4241 pr_err("error while attempting to reset the event firmware interface\n");
4242
4243 tpacpi_send_radiosw_update();
4244 tpacpi_input_send_tabletsw();
4245 hotkey_tablet_mode_notify_change();
4246 hotkey_wakeup_reason_notify_change();
4247 hotkey_wakeup_hotunplug_complete_notify_change();
4248 hotkey_poll_setup_safe(false);
4249
4250 /* restore previous mode of adapive keyboard of X1 Carbon */
4251 if (tp_features.has_adaptive_kbd) {
4252 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd",
4253 adaptive_keyboard_prev_mode)) {
4254 pr_err("Cannot set adaptive keyboard mode.\n");
4255 }
4256 }
4257 }
4258
4259 /* procfs -------------------------------------------------------------- */
hotkey_read(struct seq_file * m)4260 static int hotkey_read(struct seq_file *m)
4261 {
4262 int res, status;
4263
4264 if (!tp_features.hotkey) {
4265 seq_printf(m, "status:\t\tnot supported\n");
4266 return 0;
4267 }
4268
4269 if (mutex_lock_killable(&hotkey_mutex))
4270 return -ERESTARTSYS;
4271 res = hotkey_status_get(&status);
4272 if (!res)
4273 res = hotkey_mask_get();
4274 mutex_unlock(&hotkey_mutex);
4275 if (res)
4276 return res;
4277
4278 seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
4279 if (hotkey_all_mask) {
4280 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
4281 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
4282 } else {
4283 seq_printf(m, "mask:\t\tnot supported\n");
4284 seq_printf(m, "commands:\tenable, disable, reset\n");
4285 }
4286
4287 return 0;
4288 }
4289
hotkey_enabledisable_warn(bool enable)4290 static void hotkey_enabledisable_warn(bool enable)
4291 {
4292 tpacpi_log_usertask("procfs hotkey enable/disable");
4293 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
4294 pr_fmt("hotkey enable/disable functionality has been removed from the driver. Hotkeys are always enabled.\n")))
4295 pr_err("Please remove the hotkey=enable module parameter, it is deprecated. Hotkeys are always enabled.\n");
4296 }
4297
hotkey_write(char * buf)4298 static int hotkey_write(char *buf)
4299 {
4300 int res;
4301 u32 mask;
4302 char *cmd;
4303
4304 if (!tp_features.hotkey)
4305 return -ENODEV;
4306
4307 if (mutex_lock_killable(&hotkey_mutex))
4308 return -ERESTARTSYS;
4309
4310 mask = hotkey_user_mask;
4311
4312 res = 0;
4313 while ((cmd = strsep(&buf, ","))) {
4314 if (strlencmp(cmd, "enable") == 0) {
4315 hotkey_enabledisable_warn(1);
4316 } else if (strlencmp(cmd, "disable") == 0) {
4317 hotkey_enabledisable_warn(0);
4318 res = -EPERM;
4319 } else if (strlencmp(cmd, "reset") == 0) {
4320 mask = (hotkey_all_mask | hotkey_source_mask)
4321 & ~hotkey_reserved_mask;
4322 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
4323 /* mask set */
4324 } else if (sscanf(cmd, "%x", &mask) == 1) {
4325 /* mask set */
4326 } else {
4327 res = -EINVAL;
4328 goto errexit;
4329 }
4330 }
4331
4332 if (!res) {
4333 tpacpi_disclose_usertask("procfs hotkey",
4334 "set mask to 0x%08x\n", mask);
4335 res = hotkey_user_mask_set(mask);
4336 }
4337
4338 errexit:
4339 mutex_unlock(&hotkey_mutex);
4340 return res;
4341 }
4342
4343 static const struct acpi_device_id ibm_htk_device_ids[] = {
4344 {TPACPI_ACPI_IBM_HKEY_HID, 0},
4345 {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
4346 {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0},
4347 {"", 0},
4348 };
4349
4350 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
4351 .hid = ibm_htk_device_ids,
4352 .notify = hotkey_notify,
4353 .handle = &hkey_handle,
4354 .type = ACPI_DEVICE_NOTIFY,
4355 };
4356
4357 static struct ibm_struct hotkey_driver_data = {
4358 .name = "hotkey",
4359 .read = hotkey_read,
4360 .write = hotkey_write,
4361 .exit = hotkey_exit,
4362 .resume = hotkey_resume,
4363 .suspend = hotkey_suspend,
4364 .acpi = &ibm_hotkey_acpidriver,
4365 };
4366
4367 /*************************************************************************
4368 * Bluetooth subdriver
4369 */
4370
4371 enum {
4372 /* ACPI GBDC/SBDC bits */
4373 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
4374 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
4375 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
4376 0 = disable, 1 = enable */
4377 };
4378
4379 enum {
4380 /* ACPI \BLTH commands */
4381 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
4382 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
4383 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
4384 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
4385 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
4386 };
4387
4388 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
4389
bluetooth_get_status(void)4390 static int bluetooth_get_status(void)
4391 {
4392 int status;
4393
4394 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4395 if (dbg_bluetoothemul)
4396 return (tpacpi_bluetooth_emulstate) ?
4397 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4398 #endif
4399
4400 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
4401 return -EIO;
4402
4403 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
4404 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4405 }
4406
bluetooth_set_status(enum tpacpi_rfkill_state state)4407 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
4408 {
4409 int status;
4410
4411 vdbg_printk(TPACPI_DBG_RFKILL,
4412 "will attempt to %s bluetooth\n",
4413 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4414
4415 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4416 if (dbg_bluetoothemul) {
4417 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
4418 return 0;
4419 }
4420 #endif
4421
4422 if (state == TPACPI_RFK_RADIO_ON)
4423 status = TP_ACPI_BLUETOOTH_RADIOSSW
4424 | TP_ACPI_BLUETOOTH_RESUMECTRL;
4425 else
4426 status = 0;
4427
4428 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
4429 return -EIO;
4430
4431 return 0;
4432 }
4433
4434 /* sysfs bluetooth enable ---------------------------------------------- */
bluetooth_enable_show(struct device * dev,struct device_attribute * attr,char * buf)4435 static ssize_t bluetooth_enable_show(struct device *dev,
4436 struct device_attribute *attr,
4437 char *buf)
4438 {
4439 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
4440 attr, buf);
4441 }
4442
bluetooth_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)4443 static ssize_t bluetooth_enable_store(struct device *dev,
4444 struct device_attribute *attr,
4445 const char *buf, size_t count)
4446 {
4447 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
4448 attr, buf, count);
4449 }
4450
4451 static DEVICE_ATTR_RW(bluetooth_enable);
4452
4453 /* --------------------------------------------------------------------- */
4454
4455 static struct attribute *bluetooth_attributes[] = {
4456 &dev_attr_bluetooth_enable.attr,
4457 NULL
4458 };
4459
4460 static const struct attribute_group bluetooth_attr_group = {
4461 .attrs = bluetooth_attributes,
4462 };
4463
4464 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
4465 .get_status = bluetooth_get_status,
4466 .set_status = bluetooth_set_status,
4467 };
4468
bluetooth_shutdown(void)4469 static void bluetooth_shutdown(void)
4470 {
4471 /* Order firmware to save current state to NVRAM */
4472 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
4473 TP_ACPI_BLTH_SAVE_STATE))
4474 pr_notice("failed to save bluetooth state to NVRAM\n");
4475 else
4476 vdbg_printk(TPACPI_DBG_RFKILL,
4477 "bluetooth state saved to NVRAM\n");
4478 }
4479
bluetooth_exit(void)4480 static void bluetooth_exit(void)
4481 {
4482 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4483 &bluetooth_attr_group);
4484
4485 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4486
4487 bluetooth_shutdown();
4488 }
4489
4490 static const struct dmi_system_id bt_fwbug_list[] __initconst = {
4491 {
4492 .ident = "ThinkPad E485",
4493 .matches = {
4494 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4495 DMI_MATCH(DMI_BOARD_NAME, "20KU"),
4496 },
4497 },
4498 {
4499 .ident = "ThinkPad E585",
4500 .matches = {
4501 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4502 DMI_MATCH(DMI_BOARD_NAME, "20KV"),
4503 },
4504 },
4505 {
4506 .ident = "ThinkPad A285 - 20MW",
4507 .matches = {
4508 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4509 DMI_MATCH(DMI_BOARD_NAME, "20MW"),
4510 },
4511 },
4512 {
4513 .ident = "ThinkPad A285 - 20MX",
4514 .matches = {
4515 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4516 DMI_MATCH(DMI_BOARD_NAME, "20MX"),
4517 },
4518 },
4519 {
4520 .ident = "ThinkPad A485 - 20MU",
4521 .matches = {
4522 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4523 DMI_MATCH(DMI_BOARD_NAME, "20MU"),
4524 },
4525 },
4526 {
4527 .ident = "ThinkPad A485 - 20MV",
4528 .matches = {
4529 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4530 DMI_MATCH(DMI_BOARD_NAME, "20MV"),
4531 },
4532 },
4533 {}
4534 };
4535
4536 static const struct pci_device_id fwbug_cards_ids[] __initconst = {
4537 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24F3) },
4538 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24FD) },
4539 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2526) },
4540 {}
4541 };
4542
4543
have_bt_fwbug(void)4544 static int __init have_bt_fwbug(void)
4545 {
4546 /*
4547 * Some AMD based ThinkPads have a firmware bug that calling
4548 * "GBDC" will cause bluetooth on Intel wireless cards blocked
4549 */
4550 if (dmi_check_system(bt_fwbug_list) && pci_dev_present(fwbug_cards_ids)) {
4551 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4552 FW_BUG "disable bluetooth subdriver for Intel cards\n");
4553 return 1;
4554 } else
4555 return 0;
4556 }
4557
bluetooth_init(struct ibm_init_struct * iibm)4558 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4559 {
4560 int res;
4561 int status = 0;
4562
4563 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4564 "initializing bluetooth subdriver\n");
4565
4566 TPACPI_ACPIHANDLE_INIT(hkey);
4567
4568 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4569 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4570 tp_features.bluetooth = !have_bt_fwbug() && hkey_handle &&
4571 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4572
4573 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4574 "bluetooth is %s, status 0x%02x\n",
4575 str_supported(tp_features.bluetooth),
4576 status);
4577
4578 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4579 if (dbg_bluetoothemul) {
4580 tp_features.bluetooth = 1;
4581 pr_info("bluetooth switch emulation enabled\n");
4582 } else
4583 #endif
4584 if (tp_features.bluetooth &&
4585 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4586 /* no bluetooth hardware present in system */
4587 tp_features.bluetooth = 0;
4588 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4589 "bluetooth hardware not installed\n");
4590 }
4591
4592 if (!tp_features.bluetooth)
4593 return 1;
4594
4595 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4596 &bluetooth_tprfk_ops,
4597 RFKILL_TYPE_BLUETOOTH,
4598 TPACPI_RFK_BLUETOOTH_SW_NAME,
4599 true);
4600 if (res)
4601 return res;
4602
4603 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4604 &bluetooth_attr_group);
4605 if (res) {
4606 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4607 return res;
4608 }
4609
4610 return 0;
4611 }
4612
4613 /* procfs -------------------------------------------------------------- */
bluetooth_read(struct seq_file * m)4614 static int bluetooth_read(struct seq_file *m)
4615 {
4616 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4617 }
4618
bluetooth_write(char * buf)4619 static int bluetooth_write(char *buf)
4620 {
4621 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4622 }
4623
4624 static struct ibm_struct bluetooth_driver_data = {
4625 .name = "bluetooth",
4626 .read = bluetooth_read,
4627 .write = bluetooth_write,
4628 .exit = bluetooth_exit,
4629 .shutdown = bluetooth_shutdown,
4630 };
4631
4632 /*************************************************************************
4633 * Wan subdriver
4634 */
4635
4636 enum {
4637 /* ACPI GWAN/SWAN bits */
4638 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4639 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4640 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4641 0 = disable, 1 = enable */
4642 };
4643
4644 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4645
wan_get_status(void)4646 static int wan_get_status(void)
4647 {
4648 int status;
4649
4650 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4651 if (dbg_wwanemul)
4652 return (tpacpi_wwan_emulstate) ?
4653 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4654 #endif
4655
4656 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4657 return -EIO;
4658
4659 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4660 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4661 }
4662
wan_set_status(enum tpacpi_rfkill_state state)4663 static int wan_set_status(enum tpacpi_rfkill_state state)
4664 {
4665 int status;
4666
4667 vdbg_printk(TPACPI_DBG_RFKILL,
4668 "will attempt to %s wwan\n",
4669 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4670
4671 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4672 if (dbg_wwanemul) {
4673 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4674 return 0;
4675 }
4676 #endif
4677
4678 if (state == TPACPI_RFK_RADIO_ON)
4679 status = TP_ACPI_WANCARD_RADIOSSW
4680 | TP_ACPI_WANCARD_RESUMECTRL;
4681 else
4682 status = 0;
4683
4684 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4685 return -EIO;
4686
4687 return 0;
4688 }
4689
4690 /* sysfs wan enable ---------------------------------------------------- */
wan_enable_show(struct device * dev,struct device_attribute * attr,char * buf)4691 static ssize_t wan_enable_show(struct device *dev,
4692 struct device_attribute *attr,
4693 char *buf)
4694 {
4695 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4696 attr, buf);
4697 }
4698
wan_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)4699 static ssize_t wan_enable_store(struct device *dev,
4700 struct device_attribute *attr,
4701 const char *buf, size_t count)
4702 {
4703 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4704 attr, buf, count);
4705 }
4706
4707 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4708 wan_enable_show, wan_enable_store);
4709
4710 /* --------------------------------------------------------------------- */
4711
4712 static struct attribute *wan_attributes[] = {
4713 &dev_attr_wwan_enable.attr,
4714 NULL
4715 };
4716
4717 static const struct attribute_group wan_attr_group = {
4718 .attrs = wan_attributes,
4719 };
4720
4721 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4722 .get_status = wan_get_status,
4723 .set_status = wan_set_status,
4724 };
4725
wan_shutdown(void)4726 static void wan_shutdown(void)
4727 {
4728 /* Order firmware to save current state to NVRAM */
4729 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4730 TP_ACPI_WGSV_SAVE_STATE))
4731 pr_notice("failed to save WWAN state to NVRAM\n");
4732 else
4733 vdbg_printk(TPACPI_DBG_RFKILL,
4734 "WWAN state saved to NVRAM\n");
4735 }
4736
wan_exit(void)4737 static void wan_exit(void)
4738 {
4739 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4740 &wan_attr_group);
4741
4742 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4743
4744 wan_shutdown();
4745 }
4746
wan_init(struct ibm_init_struct * iibm)4747 static int __init wan_init(struct ibm_init_struct *iibm)
4748 {
4749 int res;
4750 int status = 0;
4751
4752 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4753 "initializing wan subdriver\n");
4754
4755 TPACPI_ACPIHANDLE_INIT(hkey);
4756
4757 tp_features.wan = hkey_handle &&
4758 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4759
4760 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4761 "wan is %s, status 0x%02x\n",
4762 str_supported(tp_features.wan),
4763 status);
4764
4765 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4766 if (dbg_wwanemul) {
4767 tp_features.wan = 1;
4768 pr_info("wwan switch emulation enabled\n");
4769 } else
4770 #endif
4771 if (tp_features.wan &&
4772 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4773 /* no wan hardware present in system */
4774 tp_features.wan = 0;
4775 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4776 "wan hardware not installed\n");
4777 }
4778
4779 if (!tp_features.wan)
4780 return 1;
4781
4782 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4783 &wan_tprfk_ops,
4784 RFKILL_TYPE_WWAN,
4785 TPACPI_RFK_WWAN_SW_NAME,
4786 true);
4787 if (res)
4788 return res;
4789
4790 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4791 &wan_attr_group);
4792
4793 if (res) {
4794 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4795 return res;
4796 }
4797
4798 return 0;
4799 }
4800
4801 /* procfs -------------------------------------------------------------- */
wan_read(struct seq_file * m)4802 static int wan_read(struct seq_file *m)
4803 {
4804 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4805 }
4806
wan_write(char * buf)4807 static int wan_write(char *buf)
4808 {
4809 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4810 }
4811
4812 static struct ibm_struct wan_driver_data = {
4813 .name = "wan",
4814 .read = wan_read,
4815 .write = wan_write,
4816 .exit = wan_exit,
4817 .shutdown = wan_shutdown,
4818 };
4819
4820 /*************************************************************************
4821 * UWB subdriver
4822 */
4823
4824 enum {
4825 /* ACPI GUWB/SUWB bits */
4826 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4827 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4828 };
4829
4830 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4831
uwb_get_status(void)4832 static int uwb_get_status(void)
4833 {
4834 int status;
4835
4836 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4837 if (dbg_uwbemul)
4838 return (tpacpi_uwb_emulstate) ?
4839 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4840 #endif
4841
4842 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4843 return -EIO;
4844
4845 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4846 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4847 }
4848
uwb_set_status(enum tpacpi_rfkill_state state)4849 static int uwb_set_status(enum tpacpi_rfkill_state state)
4850 {
4851 int status;
4852
4853 vdbg_printk(TPACPI_DBG_RFKILL,
4854 "will attempt to %s UWB\n",
4855 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4856
4857 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4858 if (dbg_uwbemul) {
4859 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4860 return 0;
4861 }
4862 #endif
4863
4864 if (state == TPACPI_RFK_RADIO_ON)
4865 status = TP_ACPI_UWB_RADIOSSW;
4866 else
4867 status = 0;
4868
4869 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4870 return -EIO;
4871
4872 return 0;
4873 }
4874
4875 /* --------------------------------------------------------------------- */
4876
4877 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4878 .get_status = uwb_get_status,
4879 .set_status = uwb_set_status,
4880 };
4881
uwb_exit(void)4882 static void uwb_exit(void)
4883 {
4884 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4885 }
4886
uwb_init(struct ibm_init_struct * iibm)4887 static int __init uwb_init(struct ibm_init_struct *iibm)
4888 {
4889 int res;
4890 int status = 0;
4891
4892 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4893 "initializing uwb subdriver\n");
4894
4895 TPACPI_ACPIHANDLE_INIT(hkey);
4896
4897 tp_features.uwb = hkey_handle &&
4898 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4899
4900 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4901 "uwb is %s, status 0x%02x\n",
4902 str_supported(tp_features.uwb),
4903 status);
4904
4905 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4906 if (dbg_uwbemul) {
4907 tp_features.uwb = 1;
4908 pr_info("uwb switch emulation enabled\n");
4909 } else
4910 #endif
4911 if (tp_features.uwb &&
4912 !(status & TP_ACPI_UWB_HWPRESENT)) {
4913 /* no uwb hardware present in system */
4914 tp_features.uwb = 0;
4915 dbg_printk(TPACPI_DBG_INIT,
4916 "uwb hardware not installed\n");
4917 }
4918
4919 if (!tp_features.uwb)
4920 return 1;
4921
4922 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4923 &uwb_tprfk_ops,
4924 RFKILL_TYPE_UWB,
4925 TPACPI_RFK_UWB_SW_NAME,
4926 false);
4927 return res;
4928 }
4929
4930 static struct ibm_struct uwb_driver_data = {
4931 .name = "uwb",
4932 .exit = uwb_exit,
4933 .flags.experimental = 1,
4934 };
4935
4936 /*************************************************************************
4937 * Video subdriver
4938 */
4939
4940 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4941
4942 enum video_access_mode {
4943 TPACPI_VIDEO_NONE = 0,
4944 TPACPI_VIDEO_570, /* 570 */
4945 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4946 TPACPI_VIDEO_NEW, /* all others */
4947 };
4948
4949 enum { /* video status flags, based on VIDEO_570 */
4950 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4951 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4952 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4953 };
4954
4955 enum { /* TPACPI_VIDEO_570 constants */
4956 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4957 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4958 * video_status_flags */
4959 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4960 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4961 };
4962
4963 static enum video_access_mode video_supported;
4964 static int video_orig_autosw;
4965
4966 static int video_autosw_get(void);
4967 static int video_autosw_set(int enable);
4968
4969 TPACPI_HANDLE(vid, root,
4970 "\\_SB.PCI.AGP.VGA", /* 570 */
4971 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
4972 "\\_SB.PCI0.VID0", /* 770e */
4973 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
4974 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */
4975 "\\_SB.PCI0.AGP.VID", /* all others */
4976 ); /* R30, R31 */
4977
4978 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4979
video_init(struct ibm_init_struct * iibm)4980 static int __init video_init(struct ibm_init_struct *iibm)
4981 {
4982 int ivga;
4983
4984 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4985
4986 TPACPI_ACPIHANDLE_INIT(vid);
4987 if (tpacpi_is_ibm())
4988 TPACPI_ACPIHANDLE_INIT(vid2);
4989
4990 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4991 /* G41, assume IVGA doesn't change */
4992 vid_handle = vid2_handle;
4993
4994 if (!vid_handle)
4995 /* video switching not supported on R30, R31 */
4996 video_supported = TPACPI_VIDEO_NONE;
4997 else if (tpacpi_is_ibm() &&
4998 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4999 /* 570 */
5000 video_supported = TPACPI_VIDEO_570;
5001 else if (tpacpi_is_ibm() &&
5002 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
5003 /* 600e/x, 770e, 770x */
5004 video_supported = TPACPI_VIDEO_770;
5005 else
5006 /* all others */
5007 video_supported = TPACPI_VIDEO_NEW;
5008
5009 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
5010 str_supported(video_supported != TPACPI_VIDEO_NONE),
5011 video_supported);
5012
5013 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1;
5014 }
5015
video_exit(void)5016 static void video_exit(void)
5017 {
5018 dbg_printk(TPACPI_DBG_EXIT,
5019 "restoring original video autoswitch mode\n");
5020 if (video_autosw_set(video_orig_autosw))
5021 pr_err("error while trying to restore original video autoswitch mode\n");
5022 }
5023
video_outputsw_get(void)5024 static int video_outputsw_get(void)
5025 {
5026 int status = 0;
5027 int i;
5028
5029 switch (video_supported) {
5030 case TPACPI_VIDEO_570:
5031 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
5032 TP_ACPI_VIDEO_570_PHSCMD))
5033 return -EIO;
5034 status = i & TP_ACPI_VIDEO_570_PHSMASK;
5035 break;
5036 case TPACPI_VIDEO_770:
5037 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
5038 return -EIO;
5039 if (i)
5040 status |= TP_ACPI_VIDEO_S_LCD;
5041 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
5042 return -EIO;
5043 if (i)
5044 status |= TP_ACPI_VIDEO_S_CRT;
5045 break;
5046 case TPACPI_VIDEO_NEW:
5047 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
5048 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
5049 return -EIO;
5050 if (i)
5051 status |= TP_ACPI_VIDEO_S_CRT;
5052
5053 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
5054 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
5055 return -EIO;
5056 if (i)
5057 status |= TP_ACPI_VIDEO_S_LCD;
5058 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
5059 return -EIO;
5060 if (i)
5061 status |= TP_ACPI_VIDEO_S_DVI;
5062 break;
5063 default:
5064 return -ENOSYS;
5065 }
5066
5067 return status;
5068 }
5069
video_outputsw_set(int status)5070 static int video_outputsw_set(int status)
5071 {
5072 int autosw;
5073 int res = 0;
5074
5075 switch (video_supported) {
5076 case TPACPI_VIDEO_570:
5077 res = acpi_evalf(NULL, NULL,
5078 "\\_SB.PHS2", "vdd",
5079 TP_ACPI_VIDEO_570_PHS2CMD,
5080 status | TP_ACPI_VIDEO_570_PHS2SET);
5081 break;
5082 case TPACPI_VIDEO_770:
5083 autosw = video_autosw_get();
5084 if (autosw < 0)
5085 return autosw;
5086
5087 res = video_autosw_set(1);
5088 if (res)
5089 return res;
5090 res = acpi_evalf(vid_handle, NULL,
5091 "ASWT", "vdd", status * 0x100, 0);
5092 if (!autosw && video_autosw_set(autosw)) {
5093 pr_err("video auto-switch left enabled due to error\n");
5094 return -EIO;
5095 }
5096 break;
5097 case TPACPI_VIDEO_NEW:
5098 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
5099 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
5100 break;
5101 default:
5102 return -ENOSYS;
5103 }
5104
5105 return (res) ? 0 : -EIO;
5106 }
5107
video_autosw_get(void)5108 static int video_autosw_get(void)
5109 {
5110 int autosw = 0;
5111
5112 switch (video_supported) {
5113 case TPACPI_VIDEO_570:
5114 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
5115 return -EIO;
5116 break;
5117 case TPACPI_VIDEO_770:
5118 case TPACPI_VIDEO_NEW:
5119 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
5120 return -EIO;
5121 break;
5122 default:
5123 return -ENOSYS;
5124 }
5125
5126 return autosw & 1;
5127 }
5128
video_autosw_set(int enable)5129 static int video_autosw_set(int enable)
5130 {
5131 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0))
5132 return -EIO;
5133 return 0;
5134 }
5135
video_outputsw_cycle(void)5136 static int video_outputsw_cycle(void)
5137 {
5138 int autosw = video_autosw_get();
5139 int res;
5140
5141 if (autosw < 0)
5142 return autosw;
5143
5144 switch (video_supported) {
5145 case TPACPI_VIDEO_570:
5146 res = video_autosw_set(1);
5147 if (res)
5148 return res;
5149 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
5150 break;
5151 case TPACPI_VIDEO_770:
5152 case TPACPI_VIDEO_NEW:
5153 res = video_autosw_set(1);
5154 if (res)
5155 return res;
5156 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
5157 break;
5158 default:
5159 return -ENOSYS;
5160 }
5161 if (!autosw && video_autosw_set(autosw)) {
5162 pr_err("video auto-switch left enabled due to error\n");
5163 return -EIO;
5164 }
5165
5166 return (res) ? 0 : -EIO;
5167 }
5168
video_expand_toggle(void)5169 static int video_expand_toggle(void)
5170 {
5171 switch (video_supported) {
5172 case TPACPI_VIDEO_570:
5173 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ?
5174 0 : -EIO;
5175 case TPACPI_VIDEO_770:
5176 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ?
5177 0 : -EIO;
5178 case TPACPI_VIDEO_NEW:
5179 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ?
5180 0 : -EIO;
5181 default:
5182 return -ENOSYS;
5183 }
5184 /* not reached */
5185 }
5186
video_read(struct seq_file * m)5187 static int video_read(struct seq_file *m)
5188 {
5189 int status, autosw;
5190
5191 if (video_supported == TPACPI_VIDEO_NONE) {
5192 seq_printf(m, "status:\t\tnot supported\n");
5193 return 0;
5194 }
5195
5196 /* Even reads can crash X.org, so... */
5197 if (!capable(CAP_SYS_ADMIN))
5198 return -EPERM;
5199
5200 status = video_outputsw_get();
5201 if (status < 0)
5202 return status;
5203
5204 autosw = video_autosw_get();
5205 if (autosw < 0)
5206 return autosw;
5207
5208 seq_printf(m, "status:\t\tsupported\n");
5209 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
5210 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
5211 if (video_supported == TPACPI_VIDEO_NEW)
5212 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
5213 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
5214 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
5215 seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
5216 if (video_supported == TPACPI_VIDEO_NEW)
5217 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
5218 seq_printf(m, "commands:\tauto_enable, auto_disable\n");
5219 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
5220
5221 return 0;
5222 }
5223
video_write(char * buf)5224 static int video_write(char *buf)
5225 {
5226 char *cmd;
5227 int enable, disable, status;
5228 int res;
5229
5230 if (video_supported == TPACPI_VIDEO_NONE)
5231 return -ENODEV;
5232
5233 /* Even reads can crash X.org, let alone writes... */
5234 if (!capable(CAP_SYS_ADMIN))
5235 return -EPERM;
5236
5237 enable = 0;
5238 disable = 0;
5239
5240 while ((cmd = strsep(&buf, ","))) {
5241 if (strlencmp(cmd, "lcd_enable") == 0) {
5242 enable |= TP_ACPI_VIDEO_S_LCD;
5243 } else if (strlencmp(cmd, "lcd_disable") == 0) {
5244 disable |= TP_ACPI_VIDEO_S_LCD;
5245 } else if (strlencmp(cmd, "crt_enable") == 0) {
5246 enable |= TP_ACPI_VIDEO_S_CRT;
5247 } else if (strlencmp(cmd, "crt_disable") == 0) {
5248 disable |= TP_ACPI_VIDEO_S_CRT;
5249 } else if (video_supported == TPACPI_VIDEO_NEW &&
5250 strlencmp(cmd, "dvi_enable") == 0) {
5251 enable |= TP_ACPI_VIDEO_S_DVI;
5252 } else if (video_supported == TPACPI_VIDEO_NEW &&
5253 strlencmp(cmd, "dvi_disable") == 0) {
5254 disable |= TP_ACPI_VIDEO_S_DVI;
5255 } else if (strlencmp(cmd, "auto_enable") == 0) {
5256 res = video_autosw_set(1);
5257 if (res)
5258 return res;
5259 } else if (strlencmp(cmd, "auto_disable") == 0) {
5260 res = video_autosw_set(0);
5261 if (res)
5262 return res;
5263 } else if (strlencmp(cmd, "video_switch") == 0) {
5264 res = video_outputsw_cycle();
5265 if (res)
5266 return res;
5267 } else if (strlencmp(cmd, "expand_toggle") == 0) {
5268 res = video_expand_toggle();
5269 if (res)
5270 return res;
5271 } else
5272 return -EINVAL;
5273 }
5274
5275 if (enable || disable) {
5276 status = video_outputsw_get();
5277 if (status < 0)
5278 return status;
5279 res = video_outputsw_set((status & ~disable) | enable);
5280 if (res)
5281 return res;
5282 }
5283
5284 return 0;
5285 }
5286
5287 static struct ibm_struct video_driver_data = {
5288 .name = "video",
5289 .read = video_read,
5290 .write = video_write,
5291 .exit = video_exit,
5292 };
5293
5294 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
5295
5296 /*************************************************************************
5297 * Keyboard backlight subdriver
5298 */
5299
5300 static enum led_brightness kbdlight_brightness;
5301 static DEFINE_MUTEX(kbdlight_mutex);
5302
kbdlight_set_level(int level)5303 static int kbdlight_set_level(int level)
5304 {
5305 int ret = 0;
5306
5307 if (!hkey_handle)
5308 return -ENXIO;
5309
5310 mutex_lock(&kbdlight_mutex);
5311
5312 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level))
5313 ret = -EIO;
5314 else
5315 kbdlight_brightness = level;
5316
5317 mutex_unlock(&kbdlight_mutex);
5318
5319 return ret;
5320 }
5321
kbdlight_get_level(void)5322 static int kbdlight_get_level(void)
5323 {
5324 int status = 0;
5325
5326 if (!hkey_handle)
5327 return -ENXIO;
5328
5329 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0))
5330 return -EIO;
5331
5332 if (status < 0)
5333 return status;
5334
5335 return status & 0x3;
5336 }
5337
kbdlight_is_supported(void)5338 static bool kbdlight_is_supported(void)
5339 {
5340 int status = 0;
5341
5342 if (!hkey_handle)
5343 return false;
5344
5345 if (!acpi_has_method(hkey_handle, "MLCG")) {
5346 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n");
5347 return false;
5348 }
5349
5350 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) {
5351 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n");
5352 return false;
5353 }
5354
5355 if (status < 0) {
5356 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status);
5357 return false;
5358 }
5359
5360 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status);
5361 /*
5362 * Guessed test for keyboard backlight:
5363 *
5364 * Machines with backlight keyboard return:
5365 * b010100000010000000XX - ThinkPad X1 Carbon 3rd
5366 * b110100010010000000XX - ThinkPad x230
5367 * b010100000010000000XX - ThinkPad x240
5368 * b010100000010000000XX - ThinkPad W541
5369 * (XX is current backlight level)
5370 *
5371 * Machines without backlight keyboard return:
5372 * b10100001000000000000 - ThinkPad x230
5373 * b10110001000000000000 - ThinkPad E430
5374 * b00000000000000000000 - ThinkPad E450
5375 *
5376 * Candidate BITs for detection test (XOR):
5377 * b01000000001000000000
5378 * ^
5379 */
5380 return status & BIT(9);
5381 }
5382
kbdlight_sysfs_set(struct led_classdev * led_cdev,enum led_brightness brightness)5383 static int kbdlight_sysfs_set(struct led_classdev *led_cdev,
5384 enum led_brightness brightness)
5385 {
5386 return kbdlight_set_level(brightness);
5387 }
5388
kbdlight_sysfs_get(struct led_classdev * led_cdev)5389 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev)
5390 {
5391 int level;
5392
5393 level = kbdlight_get_level();
5394 if (level < 0)
5395 return 0;
5396
5397 return level;
5398 }
5399
5400 static struct tpacpi_led_classdev tpacpi_led_kbdlight = {
5401 .led_classdev = {
5402 .name = "tpacpi::kbd_backlight",
5403 .max_brightness = 2,
5404 .flags = LED_BRIGHT_HW_CHANGED,
5405 .brightness_set_blocking = &kbdlight_sysfs_set,
5406 .brightness_get = &kbdlight_sysfs_get,
5407 }
5408 };
5409
kbdlight_init(struct ibm_init_struct * iibm)5410 static int __init kbdlight_init(struct ibm_init_struct *iibm)
5411 {
5412 int rc;
5413
5414 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n");
5415
5416 TPACPI_ACPIHANDLE_INIT(hkey);
5417
5418 if (!kbdlight_is_supported()) {
5419 tp_features.kbdlight = 0;
5420 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n");
5421 return 1;
5422 }
5423
5424 kbdlight_brightness = kbdlight_sysfs_get(NULL);
5425 tp_features.kbdlight = 1;
5426
5427 rc = led_classdev_register(&tpacpi_pdev->dev,
5428 &tpacpi_led_kbdlight.led_classdev);
5429 if (rc < 0) {
5430 tp_features.kbdlight = 0;
5431 return rc;
5432 }
5433
5434 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask |
5435 TP_ACPI_HKEY_KBD_LIGHT_MASK);
5436 return 0;
5437 }
5438
kbdlight_exit(void)5439 static void kbdlight_exit(void)
5440 {
5441 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev);
5442 }
5443
kbdlight_set_level_and_update(int level)5444 static int kbdlight_set_level_and_update(int level)
5445 {
5446 int ret;
5447 struct led_classdev *led_cdev;
5448
5449 ret = kbdlight_set_level(level);
5450 led_cdev = &tpacpi_led_kbdlight.led_classdev;
5451
5452 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED))
5453 led_cdev->brightness = level;
5454
5455 return ret;
5456 }
5457
kbdlight_read(struct seq_file * m)5458 static int kbdlight_read(struct seq_file *m)
5459 {
5460 int level;
5461
5462 if (!tp_features.kbdlight) {
5463 seq_printf(m, "status:\t\tnot supported\n");
5464 } else {
5465 level = kbdlight_get_level();
5466 if (level < 0)
5467 seq_printf(m, "status:\t\terror %d\n", level);
5468 else
5469 seq_printf(m, "status:\t\t%d\n", level);
5470 seq_printf(m, "commands:\t0, 1, 2\n");
5471 }
5472
5473 return 0;
5474 }
5475
kbdlight_write(char * buf)5476 static int kbdlight_write(char *buf)
5477 {
5478 char *cmd;
5479 int res, level = -EINVAL;
5480
5481 if (!tp_features.kbdlight)
5482 return -ENODEV;
5483
5484 while ((cmd = strsep(&buf, ","))) {
5485 res = kstrtoint(cmd, 10, &level);
5486 if (res < 0)
5487 return res;
5488 }
5489
5490 if (level >= 3 || level < 0)
5491 return -EINVAL;
5492
5493 return kbdlight_set_level_and_update(level);
5494 }
5495
kbdlight_suspend(void)5496 static void kbdlight_suspend(void)
5497 {
5498 struct led_classdev *led_cdev;
5499
5500 if (!tp_features.kbdlight)
5501 return;
5502
5503 led_cdev = &tpacpi_led_kbdlight.led_classdev;
5504 led_update_brightness(led_cdev);
5505 led_classdev_suspend(led_cdev);
5506 }
5507
kbdlight_resume(void)5508 static void kbdlight_resume(void)
5509 {
5510 if (!tp_features.kbdlight)
5511 return;
5512
5513 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev);
5514 }
5515
5516 static struct ibm_struct kbdlight_driver_data = {
5517 .name = "kbdlight",
5518 .read = kbdlight_read,
5519 .write = kbdlight_write,
5520 .suspend = kbdlight_suspend,
5521 .resume = kbdlight_resume,
5522 .exit = kbdlight_exit,
5523 };
5524
5525 /*************************************************************************
5526 * Light (thinklight) subdriver
5527 */
5528
5529 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
5530 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
5531
light_get_status(void)5532 static int light_get_status(void)
5533 {
5534 int status = 0;
5535
5536 if (tp_features.light_status) {
5537 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
5538 return -EIO;
5539 return (!!status);
5540 }
5541
5542 return -ENXIO;
5543 }
5544
light_set_status(int status)5545 static int light_set_status(int status)
5546 {
5547 int rc;
5548
5549 if (tp_features.light) {
5550 if (cmos_handle) {
5551 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
5552 (status) ?
5553 TP_CMOS_THINKLIGHT_ON :
5554 TP_CMOS_THINKLIGHT_OFF);
5555 } else {
5556 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
5557 (status) ? 1 : 0);
5558 }
5559 return (rc) ? 0 : -EIO;
5560 }
5561
5562 return -ENXIO;
5563 }
5564
light_sysfs_set(struct led_classdev * led_cdev,enum led_brightness brightness)5565 static int light_sysfs_set(struct led_classdev *led_cdev,
5566 enum led_brightness brightness)
5567 {
5568 return light_set_status((brightness != LED_OFF) ?
5569 TPACPI_LED_ON : TPACPI_LED_OFF);
5570 }
5571
light_sysfs_get(struct led_classdev * led_cdev)5572 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
5573 {
5574 return (light_get_status() == 1) ? LED_FULL : LED_OFF;
5575 }
5576
5577 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
5578 .led_classdev = {
5579 .name = "tpacpi::thinklight",
5580 .brightness_set_blocking = &light_sysfs_set,
5581 .brightness_get = &light_sysfs_get,
5582 }
5583 };
5584
light_init(struct ibm_init_struct * iibm)5585 static int __init light_init(struct ibm_init_struct *iibm)
5586 {
5587 int rc;
5588
5589 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
5590
5591 if (tpacpi_is_ibm()) {
5592 TPACPI_ACPIHANDLE_INIT(ledb);
5593 TPACPI_ACPIHANDLE_INIT(lght);
5594 }
5595 TPACPI_ACPIHANDLE_INIT(cmos);
5596
5597 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
5598 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
5599
5600 if (tp_features.light)
5601 /* light status not supported on
5602 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
5603 tp_features.light_status =
5604 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
5605
5606 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
5607 str_supported(tp_features.light),
5608 str_supported(tp_features.light_status));
5609
5610 if (!tp_features.light)
5611 return 1;
5612
5613 rc = led_classdev_register(&tpacpi_pdev->dev,
5614 &tpacpi_led_thinklight.led_classdev);
5615
5616 if (rc < 0) {
5617 tp_features.light = 0;
5618 tp_features.light_status = 0;
5619 } else {
5620 rc = 0;
5621 }
5622
5623 return rc;
5624 }
5625
light_exit(void)5626 static void light_exit(void)
5627 {
5628 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
5629 }
5630
light_read(struct seq_file * m)5631 static int light_read(struct seq_file *m)
5632 {
5633 int status;
5634
5635 if (!tp_features.light) {
5636 seq_printf(m, "status:\t\tnot supported\n");
5637 } else if (!tp_features.light_status) {
5638 seq_printf(m, "status:\t\tunknown\n");
5639 seq_printf(m, "commands:\ton, off\n");
5640 } else {
5641 status = light_get_status();
5642 if (status < 0)
5643 return status;
5644 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
5645 seq_printf(m, "commands:\ton, off\n");
5646 }
5647
5648 return 0;
5649 }
5650
light_write(char * buf)5651 static int light_write(char *buf)
5652 {
5653 char *cmd;
5654 int newstatus = 0;
5655
5656 if (!tp_features.light)
5657 return -ENODEV;
5658
5659 while ((cmd = strsep(&buf, ","))) {
5660 if (strlencmp(cmd, "on") == 0) {
5661 newstatus = 1;
5662 } else if (strlencmp(cmd, "off") == 0) {
5663 newstatus = 0;
5664 } else
5665 return -EINVAL;
5666 }
5667
5668 return light_set_status(newstatus);
5669 }
5670
5671 static struct ibm_struct light_driver_data = {
5672 .name = "light",
5673 .read = light_read,
5674 .write = light_write,
5675 .exit = light_exit,
5676 };
5677
5678 /*************************************************************************
5679 * CMOS subdriver
5680 */
5681
5682 /* sysfs cmos_command -------------------------------------------------- */
cmos_command_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)5683 static ssize_t cmos_command_store(struct device *dev,
5684 struct device_attribute *attr,
5685 const char *buf, size_t count)
5686 {
5687 unsigned long cmos_cmd;
5688 int res;
5689
5690 if (parse_strtoul(buf, 21, &cmos_cmd))
5691 return -EINVAL;
5692
5693 res = issue_thinkpad_cmos_command(cmos_cmd);
5694 return (res) ? res : count;
5695 }
5696
5697 static DEVICE_ATTR_WO(cmos_command);
5698
5699 /* --------------------------------------------------------------------- */
5700
cmos_init(struct ibm_init_struct * iibm)5701 static int __init cmos_init(struct ibm_init_struct *iibm)
5702 {
5703 int res;
5704
5705 vdbg_printk(TPACPI_DBG_INIT,
5706 "initializing cmos commands subdriver\n");
5707
5708 TPACPI_ACPIHANDLE_INIT(cmos);
5709
5710 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
5711 str_supported(cmos_handle != NULL));
5712
5713 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
5714 if (res)
5715 return res;
5716
5717 return (cmos_handle) ? 0 : 1;
5718 }
5719
cmos_exit(void)5720 static void cmos_exit(void)
5721 {
5722 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
5723 }
5724
cmos_read(struct seq_file * m)5725 static int cmos_read(struct seq_file *m)
5726 {
5727 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
5728 R30, R31, T20-22, X20-21 */
5729 if (!cmos_handle)
5730 seq_printf(m, "status:\t\tnot supported\n");
5731 else {
5732 seq_printf(m, "status:\t\tsupported\n");
5733 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
5734 }
5735
5736 return 0;
5737 }
5738
cmos_write(char * buf)5739 static int cmos_write(char *buf)
5740 {
5741 char *cmd;
5742 int cmos_cmd, res;
5743
5744 while ((cmd = strsep(&buf, ","))) {
5745 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
5746 cmos_cmd >= 0 && cmos_cmd <= 21) {
5747 /* cmos_cmd set */
5748 } else
5749 return -EINVAL;
5750
5751 res = issue_thinkpad_cmos_command(cmos_cmd);
5752 if (res)
5753 return res;
5754 }
5755
5756 return 0;
5757 }
5758
5759 static struct ibm_struct cmos_driver_data = {
5760 .name = "cmos",
5761 .read = cmos_read,
5762 .write = cmos_write,
5763 .exit = cmos_exit,
5764 };
5765
5766 /*************************************************************************
5767 * LED subdriver
5768 */
5769
5770 enum led_access_mode {
5771 TPACPI_LED_NONE = 0,
5772 TPACPI_LED_570, /* 570 */
5773 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5774 TPACPI_LED_NEW, /* all others */
5775 };
5776
5777 enum { /* For TPACPI_LED_OLD */
5778 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
5779 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
5780 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
5781 };
5782
5783 static enum led_access_mode led_supported;
5784
5785 static acpi_handle led_handle;
5786
5787 #define TPACPI_LED_NUMLEDS 16
5788 static struct tpacpi_led_classdev *tpacpi_leds;
5789 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5790 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5791 /* there's a limit of 19 chars + NULL before 2.6.26 */
5792 "tpacpi::power",
5793 "tpacpi:orange:batt",
5794 "tpacpi:green:batt",
5795 "tpacpi::dock_active",
5796 "tpacpi::bay_active",
5797 "tpacpi::dock_batt",
5798 "tpacpi::unknown_led",
5799 "tpacpi::standby",
5800 "tpacpi::dock_status1",
5801 "tpacpi::dock_status2",
5802 "tpacpi::unknown_led2",
5803 "tpacpi::unknown_led3",
5804 "tpacpi::thinkvantage",
5805 };
5806 #define TPACPI_SAFE_LEDS 0x1081U
5807
tpacpi_is_led_restricted(const unsigned int led)5808 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5809 {
5810 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5811 return false;
5812 #else
5813 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5814 #endif
5815 }
5816
led_get_status(const unsigned int led)5817 static int led_get_status(const unsigned int led)
5818 {
5819 int status;
5820 enum led_status_t led_s;
5821
5822 switch (led_supported) {
5823 case TPACPI_LED_570:
5824 if (!acpi_evalf(ec_handle,
5825 &status, "GLED", "dd", 1 << led))
5826 return -EIO;
5827 led_s = (status == 0) ?
5828 TPACPI_LED_OFF :
5829 ((status == 1) ?
5830 TPACPI_LED_ON :
5831 TPACPI_LED_BLINK);
5832 tpacpi_led_state_cache[led] = led_s;
5833 return led_s;
5834 default:
5835 return -ENXIO;
5836 }
5837
5838 /* not reached */
5839 }
5840
led_set_status(const unsigned int led,const enum led_status_t ledstatus)5841 static int led_set_status(const unsigned int led,
5842 const enum led_status_t ledstatus)
5843 {
5844 /* off, on, blink. Index is led_status_t */
5845 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5846 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5847
5848 int rc = 0;
5849
5850 switch (led_supported) {
5851 case TPACPI_LED_570:
5852 /* 570 */
5853 if (unlikely(led > 7))
5854 return -EINVAL;
5855 if (unlikely(tpacpi_is_led_restricted(led)))
5856 return -EPERM;
5857 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5858 (1 << led), led_sled_arg1[ledstatus]))
5859 return -EIO;
5860 break;
5861 case TPACPI_LED_OLD:
5862 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5863 if (unlikely(led > 7))
5864 return -EINVAL;
5865 if (unlikely(tpacpi_is_led_restricted(led)))
5866 return -EPERM;
5867 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5868 if (rc >= 0)
5869 rc = ec_write(TPACPI_LED_EC_HLBL,
5870 (ledstatus == TPACPI_LED_BLINK) << led);
5871 if (rc >= 0)
5872 rc = ec_write(TPACPI_LED_EC_HLCL,
5873 (ledstatus != TPACPI_LED_OFF) << led);
5874 break;
5875 case TPACPI_LED_NEW:
5876 /* all others */
5877 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5878 return -EINVAL;
5879 if (unlikely(tpacpi_is_led_restricted(led)))
5880 return -EPERM;
5881 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5882 led, led_led_arg1[ledstatus]))
5883 return -EIO;
5884 break;
5885 default:
5886 return -ENXIO;
5887 }
5888
5889 if (!rc)
5890 tpacpi_led_state_cache[led] = ledstatus;
5891
5892 return rc;
5893 }
5894
led_sysfs_set(struct led_classdev * led_cdev,enum led_brightness brightness)5895 static int led_sysfs_set(struct led_classdev *led_cdev,
5896 enum led_brightness brightness)
5897 {
5898 struct tpacpi_led_classdev *data = container_of(led_cdev,
5899 struct tpacpi_led_classdev, led_classdev);
5900 enum led_status_t new_state;
5901
5902 if (brightness == LED_OFF)
5903 new_state = TPACPI_LED_OFF;
5904 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5905 new_state = TPACPI_LED_ON;
5906 else
5907 new_state = TPACPI_LED_BLINK;
5908
5909 return led_set_status(data->led, new_state);
5910 }
5911
led_sysfs_blink_set(struct led_classdev * led_cdev,unsigned long * delay_on,unsigned long * delay_off)5912 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5913 unsigned long *delay_on, unsigned long *delay_off)
5914 {
5915 struct tpacpi_led_classdev *data = container_of(led_cdev,
5916 struct tpacpi_led_classdev, led_classdev);
5917
5918 /* Can we choose the flash rate? */
5919 if (*delay_on == 0 && *delay_off == 0) {
5920 /* yes. set them to the hardware blink rate (1 Hz) */
5921 *delay_on = 500; /* ms */
5922 *delay_off = 500; /* ms */
5923 } else if ((*delay_on != 500) || (*delay_off != 500))
5924 return -EINVAL;
5925
5926 return led_set_status(data->led, TPACPI_LED_BLINK);
5927 }
5928
led_sysfs_get(struct led_classdev * led_cdev)5929 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5930 {
5931 int rc;
5932
5933 struct tpacpi_led_classdev *data = container_of(led_cdev,
5934 struct tpacpi_led_classdev, led_classdev);
5935
5936 rc = led_get_status(data->led);
5937
5938 if (rc == TPACPI_LED_OFF || rc < 0)
5939 rc = LED_OFF; /* no error handling in led class :( */
5940 else
5941 rc = LED_FULL;
5942
5943 return rc;
5944 }
5945
led_exit(void)5946 static void led_exit(void)
5947 {
5948 unsigned int i;
5949
5950 for (i = 0; i < TPACPI_LED_NUMLEDS; i++)
5951 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5952
5953 kfree(tpacpi_leds);
5954 }
5955
tpacpi_init_led(unsigned int led)5956 static int __init tpacpi_init_led(unsigned int led)
5957 {
5958 /* LEDs with no name don't get registered */
5959 if (!tpacpi_led_names[led])
5960 return 0;
5961
5962 tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set;
5963 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5964 if (led_supported == TPACPI_LED_570)
5965 tpacpi_leds[led].led_classdev.brightness_get = &led_sysfs_get;
5966
5967 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5968 tpacpi_leds[led].led = led;
5969
5970 return led_classdev_register(&tpacpi_pdev->dev, &tpacpi_leds[led].led_classdev);
5971 }
5972
5973 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5974 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5975 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5976 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5977
5978 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5979 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5980 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5981 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5982 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5983 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5984 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5985 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5986
5987 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5988 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5989 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5990 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5991 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5992
5993 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5994 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5995 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5996 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5997
5998 /* (1) - may have excess leds enabled on MSB */
5999
6000 /* Defaults (order matters, keep last, don't reorder!) */
6001 { /* Lenovo */
6002 .vendor = PCI_VENDOR_ID_LENOVO,
6003 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
6004 .quirks = 0x1fffU,
6005 },
6006 { /* IBM ThinkPads with no EC version string */
6007 .vendor = PCI_VENDOR_ID_IBM,
6008 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
6009 .quirks = 0x00ffU,
6010 },
6011 { /* IBM ThinkPads with EC version string */
6012 .vendor = PCI_VENDOR_ID_IBM,
6013 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
6014 .quirks = 0x00bfU,
6015 },
6016 };
6017
led_init_detect_mode(void)6018 static enum led_access_mode __init led_init_detect_mode(void)
6019 {
6020 acpi_status status;
6021
6022 if (tpacpi_is_ibm()) {
6023 /* 570 */
6024 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
6025 if (ACPI_SUCCESS(status))
6026 return TPACPI_LED_570;
6027
6028 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
6029 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
6030 if (ACPI_SUCCESS(status))
6031 return TPACPI_LED_OLD;
6032 }
6033
6034 /* most others */
6035 status = acpi_get_handle(ec_handle, "LED", &led_handle);
6036 if (ACPI_SUCCESS(status))
6037 return TPACPI_LED_NEW;
6038
6039 /* R30, R31, and unknown firmwares */
6040 led_handle = NULL;
6041 return TPACPI_LED_NONE;
6042 }
6043
led_init(struct ibm_init_struct * iibm)6044 static int __init led_init(struct ibm_init_struct *iibm)
6045 {
6046 unsigned int i;
6047 int rc;
6048 unsigned long useful_leds;
6049
6050 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
6051
6052 led_supported = led_init_detect_mode();
6053
6054 if (led_supported != TPACPI_LED_NONE) {
6055 useful_leds = tpacpi_check_quirks(led_useful_qtable,
6056 ARRAY_SIZE(led_useful_qtable));
6057
6058 if (!useful_leds) {
6059 led_handle = NULL;
6060 led_supported = TPACPI_LED_NONE;
6061 }
6062 }
6063
6064 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
6065 str_supported(led_supported), led_supported);
6066
6067 if (led_supported == TPACPI_LED_NONE)
6068 return 1;
6069
6070 tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds),
6071 GFP_KERNEL);
6072 if (!tpacpi_leds) {
6073 pr_err("Out of memory for LED data\n");
6074 return -ENOMEM;
6075 }
6076
6077 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
6078 tpacpi_leds[i].led = -1;
6079
6080 if (!tpacpi_is_led_restricted(i) && test_bit(i, &useful_leds)) {
6081 rc = tpacpi_init_led(i);
6082 if (rc < 0) {
6083 led_exit();
6084 return rc;
6085 }
6086 }
6087 }
6088
6089 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
6090 pr_notice("warning: userspace override of important firmware LEDs is enabled\n");
6091 #endif
6092 return 0;
6093 }
6094
6095 #define str_led_status(s) \
6096 ((s) == TPACPI_LED_OFF ? "off" : \
6097 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
6098
led_read(struct seq_file * m)6099 static int led_read(struct seq_file *m)
6100 {
6101 if (!led_supported) {
6102 seq_printf(m, "status:\t\tnot supported\n");
6103 return 0;
6104 }
6105 seq_printf(m, "status:\t\tsupported\n");
6106
6107 if (led_supported == TPACPI_LED_570) {
6108 /* 570 */
6109 int i, status;
6110 for (i = 0; i < 8; i++) {
6111 status = led_get_status(i);
6112 if (status < 0)
6113 return -EIO;
6114 seq_printf(m, "%d:\t\t%s\n",
6115 i, str_led_status(status));
6116 }
6117 }
6118
6119 seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n");
6120
6121 return 0;
6122 }
6123
led_write(char * buf)6124 static int led_write(char *buf)
6125 {
6126 char *cmd;
6127 int led, rc;
6128 enum led_status_t s;
6129
6130 if (!led_supported)
6131 return -ENODEV;
6132
6133 while ((cmd = strsep(&buf, ","))) {
6134 if (sscanf(cmd, "%d", &led) != 1)
6135 return -EINVAL;
6136
6137 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1))
6138 return -ENODEV;
6139
6140 if (tpacpi_leds[led].led < 0)
6141 return -ENODEV;
6142
6143 if (strstr(cmd, "off")) {
6144 s = TPACPI_LED_OFF;
6145 } else if (strstr(cmd, "on")) {
6146 s = TPACPI_LED_ON;
6147 } else if (strstr(cmd, "blink")) {
6148 s = TPACPI_LED_BLINK;
6149 } else {
6150 return -EINVAL;
6151 }
6152
6153 rc = led_set_status(led, s);
6154 if (rc < 0)
6155 return rc;
6156 }
6157
6158 return 0;
6159 }
6160
6161 static struct ibm_struct led_driver_data = {
6162 .name = "led",
6163 .read = led_read,
6164 .write = led_write,
6165 .exit = led_exit,
6166 };
6167
6168 /*************************************************************************
6169 * Beep subdriver
6170 */
6171
6172 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
6173
6174 #define TPACPI_BEEP_Q1 0x0001
6175
6176 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
6177 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
6178 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
6179 };
6180
beep_init(struct ibm_init_struct * iibm)6181 static int __init beep_init(struct ibm_init_struct *iibm)
6182 {
6183 unsigned long quirks;
6184
6185 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
6186
6187 TPACPI_ACPIHANDLE_INIT(beep);
6188
6189 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
6190 str_supported(beep_handle != NULL));
6191
6192 quirks = tpacpi_check_quirks(beep_quirk_table,
6193 ARRAY_SIZE(beep_quirk_table));
6194
6195 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
6196
6197 return (beep_handle) ? 0 : 1;
6198 }
6199
beep_read(struct seq_file * m)6200 static int beep_read(struct seq_file *m)
6201 {
6202 if (!beep_handle)
6203 seq_printf(m, "status:\t\tnot supported\n");
6204 else {
6205 seq_printf(m, "status:\t\tsupported\n");
6206 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
6207 }
6208
6209 return 0;
6210 }
6211
beep_write(char * buf)6212 static int beep_write(char *buf)
6213 {
6214 char *cmd;
6215 int beep_cmd;
6216
6217 if (!beep_handle)
6218 return -ENODEV;
6219
6220 while ((cmd = strsep(&buf, ","))) {
6221 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
6222 beep_cmd >= 0 && beep_cmd <= 17) {
6223 /* beep_cmd set */
6224 } else
6225 return -EINVAL;
6226 if (tp_features.beep_needs_two_args) {
6227 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
6228 beep_cmd, 0))
6229 return -EIO;
6230 } else {
6231 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
6232 beep_cmd))
6233 return -EIO;
6234 }
6235 }
6236
6237 return 0;
6238 }
6239
6240 static struct ibm_struct beep_driver_data = {
6241 .name = "beep",
6242 .read = beep_read,
6243 .write = beep_write,
6244 };
6245
6246 /*************************************************************************
6247 * Thermal subdriver
6248 */
6249
6250 enum thermal_access_mode {
6251 TPACPI_THERMAL_NONE = 0, /* No thermal support */
6252 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
6253 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
6254 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
6255 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
6256 };
6257
6258 enum { /* TPACPI_THERMAL_TPEC_* */
6259 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
6260 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
6261 TP_EC_FUNCREV = 0xEF, /* ACPI EC Functional revision */
6262 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
6263
6264 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
6265 };
6266
6267
6268 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
6269 struct ibm_thermal_sensors_struct {
6270 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
6271 };
6272
6273 static enum thermal_access_mode thermal_read_mode;
6274
6275 /* idx is zero-based */
thermal_get_sensor(int idx,s32 * value)6276 static int thermal_get_sensor(int idx, s32 *value)
6277 {
6278 int t;
6279 s8 tmp;
6280 char tmpi[5];
6281
6282 t = TP_EC_THERMAL_TMP0;
6283
6284 switch (thermal_read_mode) {
6285 #if TPACPI_MAX_THERMAL_SENSORS >= 16
6286 case TPACPI_THERMAL_TPEC_16:
6287 if (idx >= 8 && idx <= 15) {
6288 t = TP_EC_THERMAL_TMP8;
6289 idx -= 8;
6290 }
6291 #endif
6292 fallthrough;
6293 case TPACPI_THERMAL_TPEC_8:
6294 if (idx <= 7) {
6295 if (!acpi_ec_read(t + idx, &tmp))
6296 return -EIO;
6297 *value = tmp * 1000;
6298 return 0;
6299 }
6300 break;
6301
6302 case TPACPI_THERMAL_ACPI_UPDT:
6303 if (idx <= 7) {
6304 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6305 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
6306 return -EIO;
6307 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6308 return -EIO;
6309 *value = (t - 2732) * 100;
6310 return 0;
6311 }
6312 break;
6313
6314 case TPACPI_THERMAL_ACPI_TMP07:
6315 if (idx <= 7) {
6316 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6317 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6318 return -EIO;
6319 if (t > 127 || t < -127)
6320 t = TP_EC_THERMAL_TMP_NA;
6321 *value = t * 1000;
6322 return 0;
6323 }
6324 break;
6325
6326 case TPACPI_THERMAL_NONE:
6327 default:
6328 return -ENOSYS;
6329 }
6330
6331 return -EINVAL;
6332 }
6333
thermal_get_sensors(struct ibm_thermal_sensors_struct * s)6334 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
6335 {
6336 int res, i;
6337 int n;
6338
6339 n = 8;
6340 i = 0;
6341
6342 if (!s)
6343 return -EINVAL;
6344
6345 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
6346 n = 16;
6347
6348 for (i = 0 ; i < n; i++) {
6349 res = thermal_get_sensor(i, &s->temp[i]);
6350 if (res)
6351 return res;
6352 }
6353
6354 return n;
6355 }
6356
thermal_dump_all_sensors(void)6357 static void thermal_dump_all_sensors(void)
6358 {
6359 int n, i;
6360 struct ibm_thermal_sensors_struct t;
6361
6362 n = thermal_get_sensors(&t);
6363 if (n <= 0)
6364 return;
6365
6366 pr_notice("temperatures (Celsius):");
6367
6368 for (i = 0; i < n; i++) {
6369 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
6370 pr_cont(" %d", (int)(t.temp[i] / 1000));
6371 else
6372 pr_cont(" N/A");
6373 }
6374
6375 pr_cont("\n");
6376 }
6377
6378 /* sysfs temp##_input -------------------------------------------------- */
6379
thermal_temp_input_show(struct device * dev,struct device_attribute * attr,char * buf)6380 static ssize_t thermal_temp_input_show(struct device *dev,
6381 struct device_attribute *attr,
6382 char *buf)
6383 {
6384 struct sensor_device_attribute *sensor_attr =
6385 to_sensor_dev_attr(attr);
6386 int idx = sensor_attr->index;
6387 s32 value;
6388 int res;
6389
6390 res = thermal_get_sensor(idx, &value);
6391 if (res)
6392 return res;
6393 if (value == TPACPI_THERMAL_SENSOR_NA)
6394 return -ENXIO;
6395
6396 return snprintf(buf, PAGE_SIZE, "%d\n", value);
6397 }
6398
6399 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
6400 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
6401 thermal_temp_input_show, NULL, _idxB)
6402
6403 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
6404 THERMAL_SENSOR_ATTR_TEMP(1, 0),
6405 THERMAL_SENSOR_ATTR_TEMP(2, 1),
6406 THERMAL_SENSOR_ATTR_TEMP(3, 2),
6407 THERMAL_SENSOR_ATTR_TEMP(4, 3),
6408 THERMAL_SENSOR_ATTR_TEMP(5, 4),
6409 THERMAL_SENSOR_ATTR_TEMP(6, 5),
6410 THERMAL_SENSOR_ATTR_TEMP(7, 6),
6411 THERMAL_SENSOR_ATTR_TEMP(8, 7),
6412 THERMAL_SENSOR_ATTR_TEMP(9, 8),
6413 THERMAL_SENSOR_ATTR_TEMP(10, 9),
6414 THERMAL_SENSOR_ATTR_TEMP(11, 10),
6415 THERMAL_SENSOR_ATTR_TEMP(12, 11),
6416 THERMAL_SENSOR_ATTR_TEMP(13, 12),
6417 THERMAL_SENSOR_ATTR_TEMP(14, 13),
6418 THERMAL_SENSOR_ATTR_TEMP(15, 14),
6419 THERMAL_SENSOR_ATTR_TEMP(16, 15),
6420 };
6421
6422 #define THERMAL_ATTRS(X) \
6423 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
6424
6425 static struct attribute *thermal_temp_input_attr[] = {
6426 THERMAL_ATTRS(8),
6427 THERMAL_ATTRS(9),
6428 THERMAL_ATTRS(10),
6429 THERMAL_ATTRS(11),
6430 THERMAL_ATTRS(12),
6431 THERMAL_ATTRS(13),
6432 THERMAL_ATTRS(14),
6433 THERMAL_ATTRS(15),
6434 THERMAL_ATTRS(0),
6435 THERMAL_ATTRS(1),
6436 THERMAL_ATTRS(2),
6437 THERMAL_ATTRS(3),
6438 THERMAL_ATTRS(4),
6439 THERMAL_ATTRS(5),
6440 THERMAL_ATTRS(6),
6441 THERMAL_ATTRS(7),
6442 NULL
6443 };
6444
6445 static const struct attribute_group thermal_temp_input16_group = {
6446 .attrs = thermal_temp_input_attr
6447 };
6448
6449 static const struct attribute_group thermal_temp_input8_group = {
6450 .attrs = &thermal_temp_input_attr[8]
6451 };
6452
6453 #undef THERMAL_SENSOR_ATTR_TEMP
6454 #undef THERMAL_ATTRS
6455
6456 /* --------------------------------------------------------------------- */
6457
thermal_init(struct ibm_init_struct * iibm)6458 static int __init thermal_init(struct ibm_init_struct *iibm)
6459 {
6460 u8 t, ta1, ta2, ver = 0;
6461 int i;
6462 int acpi_tmp7;
6463 int res;
6464
6465 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
6466
6467 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
6468
6469 if (thinkpad_id.ec_model) {
6470 /*
6471 * Direct EC access mode: sensors at registers
6472 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
6473 * non-implemented, thermal sensors return 0x80 when
6474 * not available
6475 * The above rule is unfortunately flawed. This has been seen with
6476 * 0xC2 (power supply ID) causing thermal control problems.
6477 * The EC version can be determined by offset 0xEF and at least for
6478 * version 3 the Lenovo firmware team confirmed that registers 0xC0-0xC7
6479 * are not thermal registers.
6480 */
6481 if (!acpi_ec_read(TP_EC_FUNCREV, &ver))
6482 pr_warn("Thinkpad ACPI EC unable to access EC version\n");
6483
6484 ta1 = ta2 = 0;
6485 for (i = 0; i < 8; i++) {
6486 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
6487 ta1 |= t;
6488 } else {
6489 ta1 = 0;
6490 break;
6491 }
6492 if (ver < 3) {
6493 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
6494 ta2 |= t;
6495 } else {
6496 ta1 = 0;
6497 break;
6498 }
6499 }
6500 }
6501 if (ta1 == 0) {
6502 /* This is sheer paranoia, but we handle it anyway */
6503 if (acpi_tmp7) {
6504 pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n");
6505 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6506 } else {
6507 pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n");
6508 thermal_read_mode = TPACPI_THERMAL_NONE;
6509 }
6510 } else {
6511 if (ver >= 3)
6512 thermal_read_mode = TPACPI_THERMAL_TPEC_8;
6513 else
6514 thermal_read_mode =
6515 (ta2 != 0) ?
6516 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
6517 }
6518 } else if (acpi_tmp7) {
6519 if (tpacpi_is_ibm() &&
6520 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
6521 /* 600e/x, 770e, 770x */
6522 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
6523 } else {
6524 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
6525 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6526 }
6527 } else {
6528 /* temperatures not supported on 570, G4x, R30, R31, R32 */
6529 thermal_read_mode = TPACPI_THERMAL_NONE;
6530 }
6531
6532 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
6533 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
6534 thermal_read_mode);
6535
6536 switch (thermal_read_mode) {
6537 case TPACPI_THERMAL_TPEC_16:
6538 res = sysfs_create_group(&tpacpi_hwmon->kobj,
6539 &thermal_temp_input16_group);
6540 if (res)
6541 return res;
6542 break;
6543 case TPACPI_THERMAL_TPEC_8:
6544 case TPACPI_THERMAL_ACPI_TMP07:
6545 case TPACPI_THERMAL_ACPI_UPDT:
6546 res = sysfs_create_group(&tpacpi_hwmon->kobj,
6547 &thermal_temp_input8_group);
6548 if (res)
6549 return res;
6550 break;
6551 case TPACPI_THERMAL_NONE:
6552 default:
6553 return 1;
6554 }
6555
6556 return 0;
6557 }
6558
thermal_exit(void)6559 static void thermal_exit(void)
6560 {
6561 switch (thermal_read_mode) {
6562 case TPACPI_THERMAL_TPEC_16:
6563 sysfs_remove_group(&tpacpi_hwmon->kobj,
6564 &thermal_temp_input16_group);
6565 break;
6566 case TPACPI_THERMAL_TPEC_8:
6567 case TPACPI_THERMAL_ACPI_TMP07:
6568 case TPACPI_THERMAL_ACPI_UPDT:
6569 sysfs_remove_group(&tpacpi_hwmon->kobj,
6570 &thermal_temp_input8_group);
6571 break;
6572 case TPACPI_THERMAL_NONE:
6573 default:
6574 break;
6575 }
6576 }
6577
thermal_read(struct seq_file * m)6578 static int thermal_read(struct seq_file *m)
6579 {
6580 int n, i;
6581 struct ibm_thermal_sensors_struct t;
6582
6583 n = thermal_get_sensors(&t);
6584 if (unlikely(n < 0))
6585 return n;
6586
6587 seq_printf(m, "temperatures:\t");
6588
6589 if (n > 0) {
6590 for (i = 0; i < (n - 1); i++)
6591 seq_printf(m, "%d ", t.temp[i] / 1000);
6592 seq_printf(m, "%d\n", t.temp[i] / 1000);
6593 } else
6594 seq_printf(m, "not supported\n");
6595
6596 return 0;
6597 }
6598
6599 static struct ibm_struct thermal_driver_data = {
6600 .name = "thermal",
6601 .read = thermal_read,
6602 .exit = thermal_exit,
6603 };
6604
6605 /*************************************************************************
6606 * Backlight/brightness subdriver
6607 */
6608
6609 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
6610
6611 /*
6612 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
6613 * CMOS NVRAM byte 0x5E, bits 0-3.
6614 *
6615 * EC HBRV (0x31) has the following layout
6616 * Bit 7: unknown function
6617 * Bit 6: unknown function
6618 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
6619 * Bit 4: must be set to zero to avoid problems
6620 * Bit 3-0: backlight brightness level
6621 *
6622 * brightness_get_raw returns status data in the HBRV layout
6623 *
6624 * WARNING: The X61 has been verified to use HBRV for something else, so
6625 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
6626 * testing on the very early *60 Lenovo models...
6627 */
6628
6629 enum {
6630 TP_EC_BACKLIGHT = 0x31,
6631
6632 /* TP_EC_BACKLIGHT bitmasks */
6633 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
6634 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
6635 TP_EC_BACKLIGHT_MAPSW = 0x20,
6636 };
6637
6638 enum tpacpi_brightness_access_mode {
6639 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
6640 TPACPI_BRGHT_MODE_EC, /* EC control */
6641 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
6642 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6643 TPACPI_BRGHT_MODE_MAX
6644 };
6645
6646 static struct backlight_device *ibm_backlight_device;
6647
6648 static enum tpacpi_brightness_access_mode brightness_mode =
6649 TPACPI_BRGHT_MODE_MAX;
6650
6651 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
6652
6653 static struct mutex brightness_mutex;
6654
6655 /* NVRAM brightness access,
6656 * call with brightness_mutex held! */
tpacpi_brightness_nvram_get(void)6657 static unsigned int tpacpi_brightness_nvram_get(void)
6658 {
6659 u8 lnvram;
6660
6661 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
6662 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6663 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
6664 lnvram &= bright_maxlvl;
6665
6666 return lnvram;
6667 }
6668
tpacpi_brightness_checkpoint_nvram(void)6669 static void tpacpi_brightness_checkpoint_nvram(void)
6670 {
6671 u8 lec = 0;
6672 u8 b_nvram;
6673
6674 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
6675 return;
6676
6677 vdbg_printk(TPACPI_DBG_BRGHT,
6678 "trying to checkpoint backlight level to NVRAM...\n");
6679
6680 if (mutex_lock_killable(&brightness_mutex) < 0)
6681 return;
6682
6683 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6684 goto unlock;
6685 lec &= TP_EC_BACKLIGHT_LVLMSK;
6686 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
6687
6688 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6689 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
6690 /* NVRAM needs update */
6691 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
6692 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
6693 b_nvram |= lec;
6694 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
6695 dbg_printk(TPACPI_DBG_BRGHT,
6696 "updated NVRAM backlight level to %u (0x%02x)\n",
6697 (unsigned int) lec, (unsigned int) b_nvram);
6698 } else
6699 vdbg_printk(TPACPI_DBG_BRGHT,
6700 "NVRAM backlight level already is %u (0x%02x)\n",
6701 (unsigned int) lec, (unsigned int) b_nvram);
6702
6703 unlock:
6704 mutex_unlock(&brightness_mutex);
6705 }
6706
6707
6708 /* call with brightness_mutex held! */
tpacpi_brightness_get_raw(int * status)6709 static int tpacpi_brightness_get_raw(int *status)
6710 {
6711 u8 lec = 0;
6712
6713 switch (brightness_mode) {
6714 case TPACPI_BRGHT_MODE_UCMS_STEP:
6715 *status = tpacpi_brightness_nvram_get();
6716 return 0;
6717 case TPACPI_BRGHT_MODE_EC:
6718 case TPACPI_BRGHT_MODE_ECNVRAM:
6719 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6720 return -EIO;
6721 *status = lec;
6722 return 0;
6723 default:
6724 return -ENXIO;
6725 }
6726 }
6727
6728 /* call with brightness_mutex held! */
6729 /* do NOT call with illegal backlight level value */
tpacpi_brightness_set_ec(unsigned int value)6730 static int tpacpi_brightness_set_ec(unsigned int value)
6731 {
6732 u8 lec = 0;
6733
6734 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6735 return -EIO;
6736
6737 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6738 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6739 (value & TP_EC_BACKLIGHT_LVLMSK))))
6740 return -EIO;
6741
6742 return 0;
6743 }
6744
6745 /* call with brightness_mutex held! */
tpacpi_brightness_set_ucmsstep(unsigned int value)6746 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6747 {
6748 int cmos_cmd, inc;
6749 unsigned int current_value, i;
6750
6751 current_value = tpacpi_brightness_nvram_get();
6752
6753 if (value == current_value)
6754 return 0;
6755
6756 cmos_cmd = (value > current_value) ?
6757 TP_CMOS_BRIGHTNESS_UP :
6758 TP_CMOS_BRIGHTNESS_DOWN;
6759 inc = (value > current_value) ? 1 : -1;
6760
6761 for (i = current_value; i != value; i += inc)
6762 if (issue_thinkpad_cmos_command(cmos_cmd))
6763 return -EIO;
6764
6765 return 0;
6766 }
6767
6768 /* May return EINTR which can always be mapped to ERESTARTSYS */
brightness_set(unsigned int value)6769 static int brightness_set(unsigned int value)
6770 {
6771 int res;
6772
6773 if (value > bright_maxlvl)
6774 return -EINVAL;
6775
6776 vdbg_printk(TPACPI_DBG_BRGHT,
6777 "set backlight level to %d\n", value);
6778
6779 res = mutex_lock_killable(&brightness_mutex);
6780 if (res < 0)
6781 return res;
6782
6783 switch (brightness_mode) {
6784 case TPACPI_BRGHT_MODE_EC:
6785 case TPACPI_BRGHT_MODE_ECNVRAM:
6786 res = tpacpi_brightness_set_ec(value);
6787 break;
6788 case TPACPI_BRGHT_MODE_UCMS_STEP:
6789 res = tpacpi_brightness_set_ucmsstep(value);
6790 break;
6791 default:
6792 res = -ENXIO;
6793 }
6794
6795 mutex_unlock(&brightness_mutex);
6796 return res;
6797 }
6798
6799 /* sysfs backlight class ----------------------------------------------- */
6800
brightness_update_status(struct backlight_device * bd)6801 static int brightness_update_status(struct backlight_device *bd)
6802 {
6803 unsigned int level =
6804 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6805 bd->props.power == FB_BLANK_UNBLANK) ?
6806 bd->props.brightness : 0;
6807
6808 dbg_printk(TPACPI_DBG_BRGHT,
6809 "backlight: attempt to set level to %d\n",
6810 level);
6811
6812 /* it is the backlight class's job (caller) to handle
6813 * EINTR and other errors properly */
6814 return brightness_set(level);
6815 }
6816
brightness_get(struct backlight_device * bd)6817 static int brightness_get(struct backlight_device *bd)
6818 {
6819 int status, res;
6820
6821 res = mutex_lock_killable(&brightness_mutex);
6822 if (res < 0)
6823 return 0;
6824
6825 res = tpacpi_brightness_get_raw(&status);
6826
6827 mutex_unlock(&brightness_mutex);
6828
6829 if (res < 0)
6830 return 0;
6831
6832 return status & TP_EC_BACKLIGHT_LVLMSK;
6833 }
6834
tpacpi_brightness_notify_change(void)6835 static void tpacpi_brightness_notify_change(void)
6836 {
6837 backlight_force_update(ibm_backlight_device,
6838 BACKLIGHT_UPDATE_HOTKEY);
6839 }
6840
6841 static const struct backlight_ops ibm_backlight_data = {
6842 .get_brightness = brightness_get,
6843 .update_status = brightness_update_status,
6844 };
6845
6846 /* --------------------------------------------------------------------- */
6847
6848 /*
6849 * Call _BCL method of video device. On some ThinkPads this will
6850 * switch the firmware to the ACPI brightness control mode.
6851 */
6852
tpacpi_query_bcl_levels(acpi_handle handle)6853 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6854 {
6855 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6856 union acpi_object *obj;
6857 struct acpi_device *device, *child;
6858 int rc;
6859
6860 if (acpi_bus_get_device(handle, &device))
6861 return 0;
6862
6863 rc = 0;
6864 list_for_each_entry(child, &device->children, node) {
6865 acpi_status status = acpi_evaluate_object(child->handle, "_BCL",
6866 NULL, &buffer);
6867 if (ACPI_FAILURE(status)) {
6868 buffer.length = ACPI_ALLOCATE_BUFFER;
6869 continue;
6870 }
6871
6872 obj = (union acpi_object *)buffer.pointer;
6873 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6874 pr_err("Unknown _BCL data, please report this to %s\n",
6875 TPACPI_MAIL);
6876 rc = 0;
6877 } else {
6878 rc = obj->package.count;
6879 }
6880 break;
6881 }
6882
6883 kfree(buffer.pointer);
6884 return rc;
6885 }
6886
6887
6888 /*
6889 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6890 */
tpacpi_check_std_acpi_brightness_support(void)6891 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6892 {
6893 acpi_handle video_device;
6894 int bcl_levels = 0;
6895
6896 tpacpi_acpi_handle_locate("video", NULL, &video_device);
6897 if (video_device)
6898 bcl_levels = tpacpi_query_bcl_levels(video_device);
6899
6900 tp_features.bright_acpimode = (bcl_levels > 0);
6901
6902 return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6903 }
6904
6905 /*
6906 * These are only useful for models that have only one possibility
6907 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6908 * these quirks.
6909 */
6910 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6911 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6912 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6913
6914 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6915 /* Models with ATI GPUs known to require ECNVRAM mode */
6916 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6917
6918 /* Models with ATI GPUs that can use ECNVRAM */
6919 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */
6920 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6921 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */
6922 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6923
6924 /* Models with Intel Extreme Graphics 2 */
6925 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */
6926 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6927 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6928
6929 /* Models with Intel GMA900 */
6930 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6931 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6932 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6933 };
6934
6935 /*
6936 * Returns < 0 for error, otherwise sets tp_features.bright_*
6937 * and bright_maxlvl.
6938 */
tpacpi_detect_brightness_capabilities(void)6939 static void __init tpacpi_detect_brightness_capabilities(void)
6940 {
6941 unsigned int b;
6942
6943 vdbg_printk(TPACPI_DBG_INIT,
6944 "detecting firmware brightness interface capabilities\n");
6945
6946 /* we could run a quirks check here (same table used by
6947 * brightness_init) if needed */
6948
6949 /*
6950 * We always attempt to detect acpi support, so as to switch
6951 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6952 * going to publish a backlight interface
6953 */
6954 b = tpacpi_check_std_acpi_brightness_support();
6955 switch (b) {
6956 case 16:
6957 bright_maxlvl = 15;
6958 break;
6959 case 8:
6960 case 0:
6961 bright_maxlvl = 7;
6962 break;
6963 default:
6964 tp_features.bright_unkfw = 1;
6965 bright_maxlvl = b - 1;
6966 }
6967 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1);
6968 }
6969
brightness_init(struct ibm_init_struct * iibm)6970 static int __init brightness_init(struct ibm_init_struct *iibm)
6971 {
6972 struct backlight_properties props;
6973 int b;
6974 unsigned long quirks;
6975
6976 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6977
6978 mutex_init(&brightness_mutex);
6979
6980 quirks = tpacpi_check_quirks(brightness_quirk_table,
6981 ARRAY_SIZE(brightness_quirk_table));
6982
6983 /* tpacpi_detect_brightness_capabilities() must have run already */
6984
6985 /* if it is unknown, we don't handle it: it wouldn't be safe */
6986 if (tp_features.bright_unkfw)
6987 return 1;
6988
6989 if (!brightness_enable) {
6990 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6991 "brightness support disabled by module parameter\n");
6992 return 1;
6993 }
6994
6995 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
6996 if (brightness_enable > 1) {
6997 pr_info("Standard ACPI backlight interface available, not loading native one\n");
6998 return 1;
6999 } else if (brightness_enable == 1) {
7000 pr_warn("Cannot enable backlight brightness support, ACPI is already handling it. Refer to the acpi_backlight kernel parameter.\n");
7001 return 1;
7002 }
7003 } else if (!tp_features.bright_acpimode) {
7004 pr_notice("ACPI backlight interface not available\n");
7005 return 1;
7006 }
7007
7008 pr_notice("ACPI native brightness control enabled\n");
7009
7010 /*
7011 * Check for module parameter bogosity, note that we
7012 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
7013 * able to detect "unspecified"
7014 */
7015 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
7016 return -EINVAL;
7017
7018 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
7019 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
7020 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
7021 if (quirks & TPACPI_BRGHT_Q_EC)
7022 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
7023 else
7024 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
7025
7026 dbg_printk(TPACPI_DBG_BRGHT,
7027 "driver auto-selected brightness_mode=%d\n",
7028 brightness_mode);
7029 }
7030
7031 /* Safety */
7032 if (!tpacpi_is_ibm() &&
7033 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
7034 brightness_mode == TPACPI_BRGHT_MODE_EC))
7035 return -EINVAL;
7036
7037 if (tpacpi_brightness_get_raw(&b) < 0)
7038 return 1;
7039
7040 memset(&props, 0, sizeof(struct backlight_properties));
7041 props.type = BACKLIGHT_PLATFORM;
7042 props.max_brightness = bright_maxlvl;
7043 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
7044 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
7045 NULL, NULL,
7046 &ibm_backlight_data,
7047 &props);
7048 if (IS_ERR(ibm_backlight_device)) {
7049 int rc = PTR_ERR(ibm_backlight_device);
7050 ibm_backlight_device = NULL;
7051 pr_err("Could not register backlight device\n");
7052 return rc;
7053 }
7054 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
7055 "brightness is supported\n");
7056
7057 if (quirks & TPACPI_BRGHT_Q_ASK) {
7058 pr_notice("brightness: will use unverified default: brightness_mode=%d\n",
7059 brightness_mode);
7060 pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n",
7061 TPACPI_MAIL);
7062 }
7063
7064 /* Added by mistake in early 2007. Probably useless, but it could
7065 * be working around some unknown firmware problem where the value
7066 * read at startup doesn't match the real hardware state... so leave
7067 * it in place just in case */
7068 backlight_update_status(ibm_backlight_device);
7069
7070 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
7071 "brightness: registering brightness hotkeys as change notification\n");
7072 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7073 | TP_ACPI_HKEY_BRGHTUP_MASK
7074 | TP_ACPI_HKEY_BRGHTDWN_MASK);
7075 return 0;
7076 }
7077
brightness_suspend(void)7078 static void brightness_suspend(void)
7079 {
7080 tpacpi_brightness_checkpoint_nvram();
7081 }
7082
brightness_shutdown(void)7083 static void brightness_shutdown(void)
7084 {
7085 tpacpi_brightness_checkpoint_nvram();
7086 }
7087
brightness_exit(void)7088 static void brightness_exit(void)
7089 {
7090 if (ibm_backlight_device) {
7091 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
7092 "calling backlight_device_unregister()\n");
7093 backlight_device_unregister(ibm_backlight_device);
7094 }
7095
7096 tpacpi_brightness_checkpoint_nvram();
7097 }
7098
brightness_read(struct seq_file * m)7099 static int brightness_read(struct seq_file *m)
7100 {
7101 int level;
7102
7103 level = brightness_get(NULL);
7104 if (level < 0) {
7105 seq_printf(m, "level:\t\tunreadable\n");
7106 } else {
7107 seq_printf(m, "level:\t\t%d\n", level);
7108 seq_printf(m, "commands:\tup, down\n");
7109 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
7110 bright_maxlvl);
7111 }
7112
7113 return 0;
7114 }
7115
brightness_write(char * buf)7116 static int brightness_write(char *buf)
7117 {
7118 int level;
7119 int rc;
7120 char *cmd;
7121
7122 level = brightness_get(NULL);
7123 if (level < 0)
7124 return level;
7125
7126 while ((cmd = strsep(&buf, ","))) {
7127 if (strlencmp(cmd, "up") == 0) {
7128 if (level < bright_maxlvl)
7129 level++;
7130 } else if (strlencmp(cmd, "down") == 0) {
7131 if (level > 0)
7132 level--;
7133 } else if (sscanf(cmd, "level %d", &level) == 1 &&
7134 level >= 0 && level <= bright_maxlvl) {
7135 /* new level set */
7136 } else
7137 return -EINVAL;
7138 }
7139
7140 tpacpi_disclose_usertask("procfs brightness",
7141 "set level to %d\n", level);
7142
7143 /*
7144 * Now we know what the final level should be, so we try to set it.
7145 * Doing it this way makes the syscall restartable in case of EINTR
7146 */
7147 rc = brightness_set(level);
7148 if (!rc && ibm_backlight_device)
7149 backlight_force_update(ibm_backlight_device,
7150 BACKLIGHT_UPDATE_SYSFS);
7151 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7152 }
7153
7154 static struct ibm_struct brightness_driver_data = {
7155 .name = "brightness",
7156 .read = brightness_read,
7157 .write = brightness_write,
7158 .exit = brightness_exit,
7159 .suspend = brightness_suspend,
7160 .shutdown = brightness_shutdown,
7161 };
7162
7163 /*************************************************************************
7164 * Volume subdriver
7165 */
7166
7167 /*
7168 * IBM ThinkPads have a simple volume controller with MUTE gating.
7169 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
7170 *
7171 * Since the *61 series (and probably also the later *60 series), Lenovo
7172 * ThinkPads only implement the MUTE gate.
7173 *
7174 * EC register 0x30
7175 * Bit 6: MUTE (1 mutes sound)
7176 * Bit 3-0: Volume
7177 * Other bits should be zero as far as we know.
7178 *
7179 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
7180 * bits 3-0 (volume). Other bits in NVRAM may have other functions,
7181 * such as bit 7 which is used to detect repeated presses of MUTE,
7182 * and we leave them unchanged.
7183 *
7184 * On newer Lenovo ThinkPads, the EC can automatically change the volume
7185 * in response to user input. Unfortunately, this rarely works well.
7186 * The laptop changes the state of its internal MUTE gate and, on some
7187 * models, sends KEY_MUTE, causing any user code that responds to the
7188 * mute button to get confused. The hardware MUTE gate is also
7189 * unnecessary, since user code can handle the mute button without
7190 * kernel or EC help.
7191 *
7192 * To avoid confusing userspace, we simply disable all EC-based mute
7193 * and volume controls when possible.
7194 */
7195
7196 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
7197
7198 #define TPACPI_ALSA_DRVNAME "ThinkPad EC"
7199 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
7200 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
7201
7202 #if SNDRV_CARDS <= 32
7203 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1)
7204 #else
7205 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1)
7206 #endif
7207 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */
7208 static char *alsa_id = "ThinkPadEC";
7209 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
7210
7211 struct tpacpi_alsa_data {
7212 struct snd_card *card;
7213 struct snd_ctl_elem_id *ctl_mute_id;
7214 struct snd_ctl_elem_id *ctl_vol_id;
7215 };
7216
7217 static struct snd_card *alsa_card;
7218
7219 enum {
7220 TP_EC_AUDIO = 0x30,
7221
7222 /* TP_EC_AUDIO bits */
7223 TP_EC_AUDIO_MUTESW = 6,
7224
7225 /* TP_EC_AUDIO bitmasks */
7226 TP_EC_AUDIO_LVL_MSK = 0x0F,
7227 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
7228
7229 /* Maximum volume */
7230 TP_EC_VOLUME_MAX = 14,
7231 };
7232
7233 enum tpacpi_volume_access_mode {
7234 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
7235 TPACPI_VOL_MODE_EC, /* Pure EC control */
7236 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
7237 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
7238 TPACPI_VOL_MODE_MAX
7239 };
7240
7241 enum tpacpi_volume_capabilities {
7242 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
7243 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
7244 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
7245 TPACPI_VOL_CAP_MAX
7246 };
7247
7248 enum tpacpi_mute_btn_mode {
7249 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */
7250 /* We don't know what mode 1 is. */
7251 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */
7252 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */
7253 };
7254
7255 static enum tpacpi_volume_access_mode volume_mode =
7256 TPACPI_VOL_MODE_MAX;
7257
7258 static enum tpacpi_volume_capabilities volume_capabilities;
7259 static bool volume_control_allowed;
7260 static bool software_mute_requested = true;
7261 static bool software_mute_active;
7262 static int software_mute_orig_mode;
7263
7264 /*
7265 * Used to syncronize writers to TP_EC_AUDIO and
7266 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
7267 */
7268 static struct mutex volume_mutex;
7269
tpacpi_volume_checkpoint_nvram(void)7270 static void tpacpi_volume_checkpoint_nvram(void)
7271 {
7272 u8 lec = 0;
7273 u8 b_nvram;
7274 u8 ec_mask;
7275
7276 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
7277 return;
7278 if (!volume_control_allowed)
7279 return;
7280 if (software_mute_active)
7281 return;
7282
7283 vdbg_printk(TPACPI_DBG_MIXER,
7284 "trying to checkpoint mixer state to NVRAM...\n");
7285
7286 if (tp_features.mixer_no_level_control)
7287 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
7288 else
7289 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
7290
7291 if (mutex_lock_killable(&volume_mutex) < 0)
7292 return;
7293
7294 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
7295 goto unlock;
7296 lec &= ec_mask;
7297 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
7298
7299 if (lec != (b_nvram & ec_mask)) {
7300 /* NVRAM needs update */
7301 b_nvram &= ~ec_mask;
7302 b_nvram |= lec;
7303 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
7304 dbg_printk(TPACPI_DBG_MIXER,
7305 "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
7306 (unsigned int) lec, (unsigned int) b_nvram);
7307 } else {
7308 vdbg_printk(TPACPI_DBG_MIXER,
7309 "NVRAM mixer status already is 0x%02x (0x%02x)\n",
7310 (unsigned int) lec, (unsigned int) b_nvram);
7311 }
7312
7313 unlock:
7314 mutex_unlock(&volume_mutex);
7315 }
7316
volume_get_status_ec(u8 * status)7317 static int volume_get_status_ec(u8 *status)
7318 {
7319 u8 s;
7320
7321 if (!acpi_ec_read(TP_EC_AUDIO, &s))
7322 return -EIO;
7323
7324 *status = s;
7325
7326 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
7327
7328 return 0;
7329 }
7330
volume_get_status(u8 * status)7331 static int volume_get_status(u8 *status)
7332 {
7333 return volume_get_status_ec(status);
7334 }
7335
volume_set_status_ec(const u8 status)7336 static int volume_set_status_ec(const u8 status)
7337 {
7338 if (!acpi_ec_write(TP_EC_AUDIO, status))
7339 return -EIO;
7340
7341 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
7342
7343 /*
7344 * On X200s, and possibly on others, it can take a while for
7345 * reads to become correct.
7346 */
7347 msleep(1);
7348
7349 return 0;
7350 }
7351
volume_set_status(const u8 status)7352 static int volume_set_status(const u8 status)
7353 {
7354 return volume_set_status_ec(status);
7355 }
7356
7357 /* returns < 0 on error, 0 on no change, 1 on change */
__volume_set_mute_ec(const bool mute)7358 static int __volume_set_mute_ec(const bool mute)
7359 {
7360 int rc;
7361 u8 s, n;
7362
7363 if (mutex_lock_killable(&volume_mutex) < 0)
7364 return -EINTR;
7365
7366 rc = volume_get_status_ec(&s);
7367 if (rc)
7368 goto unlock;
7369
7370 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
7371 s & ~TP_EC_AUDIO_MUTESW_MSK;
7372
7373 if (n != s) {
7374 rc = volume_set_status_ec(n);
7375 if (!rc)
7376 rc = 1;
7377 }
7378
7379 unlock:
7380 mutex_unlock(&volume_mutex);
7381 return rc;
7382 }
7383
volume_alsa_set_mute(const bool mute)7384 static int volume_alsa_set_mute(const bool mute)
7385 {
7386 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
7387 (mute) ? "" : "un");
7388 return __volume_set_mute_ec(mute);
7389 }
7390
volume_set_mute(const bool mute)7391 static int volume_set_mute(const bool mute)
7392 {
7393 int rc;
7394
7395 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
7396 (mute) ? "" : "un");
7397
7398 rc = __volume_set_mute_ec(mute);
7399 return (rc < 0) ? rc : 0;
7400 }
7401
7402 /* returns < 0 on error, 0 on no change, 1 on change */
__volume_set_volume_ec(const u8 vol)7403 static int __volume_set_volume_ec(const u8 vol)
7404 {
7405 int rc;
7406 u8 s, n;
7407
7408 if (vol > TP_EC_VOLUME_MAX)
7409 return -EINVAL;
7410
7411 if (mutex_lock_killable(&volume_mutex) < 0)
7412 return -EINTR;
7413
7414 rc = volume_get_status_ec(&s);
7415 if (rc)
7416 goto unlock;
7417
7418 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
7419
7420 if (n != s) {
7421 rc = volume_set_status_ec(n);
7422 if (!rc)
7423 rc = 1;
7424 }
7425
7426 unlock:
7427 mutex_unlock(&volume_mutex);
7428 return rc;
7429 }
7430
volume_set_software_mute(bool startup)7431 static int volume_set_software_mute(bool startup)
7432 {
7433 int result;
7434
7435 if (!tpacpi_is_lenovo())
7436 return -ENODEV;
7437
7438 if (startup) {
7439 if (!acpi_evalf(ec_handle, &software_mute_orig_mode,
7440 "HAUM", "qd"))
7441 return -EIO;
7442
7443 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7444 "Initial HAUM setting was %d\n",
7445 software_mute_orig_mode);
7446 }
7447
7448 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd",
7449 (int)TP_EC_MUTE_BTN_NONE))
7450 return -EIO;
7451
7452 if (result != TP_EC_MUTE_BTN_NONE)
7453 pr_warn("Unexpected SAUM result %d\n",
7454 result);
7455
7456 /*
7457 * In software mute mode, the standard codec controls take
7458 * precendence, so we unmute the ThinkPad HW switch at
7459 * startup. Just on case there are SAUM-capable ThinkPads
7460 * with level controls, set max HW volume as well.
7461 */
7462 if (tp_features.mixer_no_level_control)
7463 result = volume_set_mute(false);
7464 else
7465 result = volume_set_status(TP_EC_VOLUME_MAX);
7466
7467 if (result != 0)
7468 pr_warn("Failed to unmute the HW mute switch\n");
7469
7470 return 0;
7471 }
7472
volume_exit_software_mute(void)7473 static void volume_exit_software_mute(void)
7474 {
7475 int r;
7476
7477 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode)
7478 || r != software_mute_orig_mode)
7479 pr_warn("Failed to restore mute mode\n");
7480 }
7481
volume_alsa_set_volume(const u8 vol)7482 static int volume_alsa_set_volume(const u8 vol)
7483 {
7484 dbg_printk(TPACPI_DBG_MIXER,
7485 "ALSA: trying to set volume level to %hu\n", vol);
7486 return __volume_set_volume_ec(vol);
7487 }
7488
volume_alsa_notify_change(void)7489 static void volume_alsa_notify_change(void)
7490 {
7491 struct tpacpi_alsa_data *d;
7492
7493 if (alsa_card && alsa_card->private_data) {
7494 d = alsa_card->private_data;
7495 if (d->ctl_mute_id)
7496 snd_ctl_notify(alsa_card,
7497 SNDRV_CTL_EVENT_MASK_VALUE,
7498 d->ctl_mute_id);
7499 if (d->ctl_vol_id)
7500 snd_ctl_notify(alsa_card,
7501 SNDRV_CTL_EVENT_MASK_VALUE,
7502 d->ctl_vol_id);
7503 }
7504 }
7505
volume_alsa_vol_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)7506 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
7507 struct snd_ctl_elem_info *uinfo)
7508 {
7509 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
7510 uinfo->count = 1;
7511 uinfo->value.integer.min = 0;
7512 uinfo->value.integer.max = TP_EC_VOLUME_MAX;
7513 return 0;
7514 }
7515
volume_alsa_vol_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)7516 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
7517 struct snd_ctl_elem_value *ucontrol)
7518 {
7519 u8 s;
7520 int rc;
7521
7522 rc = volume_get_status(&s);
7523 if (rc < 0)
7524 return rc;
7525
7526 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
7527 return 0;
7528 }
7529
volume_alsa_vol_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)7530 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
7531 struct snd_ctl_elem_value *ucontrol)
7532 {
7533 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
7534 ucontrol->value.integer.value[0]);
7535 return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
7536 }
7537
7538 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
7539
volume_alsa_mute_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)7540 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
7541 struct snd_ctl_elem_value *ucontrol)
7542 {
7543 u8 s;
7544 int rc;
7545
7546 rc = volume_get_status(&s);
7547 if (rc < 0)
7548 return rc;
7549
7550 ucontrol->value.integer.value[0] =
7551 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
7552 return 0;
7553 }
7554
volume_alsa_mute_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)7555 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
7556 struct snd_ctl_elem_value *ucontrol)
7557 {
7558 tpacpi_disclose_usertask("ALSA", "%smute\n",
7559 ucontrol->value.integer.value[0] ?
7560 "un" : "");
7561 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
7562 }
7563
7564 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = {
7565 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7566 .name = "Console Playback Volume",
7567 .index = 0,
7568 .access = SNDRV_CTL_ELEM_ACCESS_READ,
7569 .info = volume_alsa_vol_info,
7570 .get = volume_alsa_vol_get,
7571 };
7572
7573 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = {
7574 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7575 .name = "Console Playback Switch",
7576 .index = 0,
7577 .access = SNDRV_CTL_ELEM_ACCESS_READ,
7578 .info = volume_alsa_mute_info,
7579 .get = volume_alsa_mute_get,
7580 };
7581
volume_suspend(void)7582 static void volume_suspend(void)
7583 {
7584 tpacpi_volume_checkpoint_nvram();
7585 }
7586
volume_resume(void)7587 static void volume_resume(void)
7588 {
7589 if (software_mute_active) {
7590 if (volume_set_software_mute(false) < 0)
7591 pr_warn("Failed to restore software mute\n");
7592 } else {
7593 volume_alsa_notify_change();
7594 }
7595 }
7596
volume_shutdown(void)7597 static void volume_shutdown(void)
7598 {
7599 tpacpi_volume_checkpoint_nvram();
7600 }
7601
volume_exit(void)7602 static void volume_exit(void)
7603 {
7604 if (alsa_card) {
7605 snd_card_free(alsa_card);
7606 alsa_card = NULL;
7607 }
7608
7609 tpacpi_volume_checkpoint_nvram();
7610
7611 if (software_mute_active)
7612 volume_exit_software_mute();
7613 }
7614
volume_create_alsa_mixer(void)7615 static int __init volume_create_alsa_mixer(void)
7616 {
7617 struct snd_card *card;
7618 struct tpacpi_alsa_data *data;
7619 struct snd_kcontrol *ctl_vol;
7620 struct snd_kcontrol *ctl_mute;
7621 int rc;
7622
7623 rc = snd_card_new(&tpacpi_pdev->dev,
7624 alsa_index, alsa_id, THIS_MODULE,
7625 sizeof(struct tpacpi_alsa_data), &card);
7626 if (rc < 0 || !card) {
7627 pr_err("Failed to create ALSA card structures: %d\n", rc);
7628 return 1;
7629 }
7630
7631 BUG_ON(!card->private_data);
7632 data = card->private_data;
7633 data->card = card;
7634
7635 strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
7636 sizeof(card->driver));
7637 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
7638 sizeof(card->shortname));
7639 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
7640 (thinkpad_id.ec_version_str) ?
7641 thinkpad_id.ec_version_str : "(unknown)");
7642 snprintf(card->longname, sizeof(card->longname),
7643 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
7644 (thinkpad_id.ec_version_str) ?
7645 thinkpad_id.ec_version_str : "unknown");
7646
7647 if (volume_control_allowed) {
7648 volume_alsa_control_vol.put = volume_alsa_vol_put;
7649 volume_alsa_control_vol.access =
7650 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7651
7652 volume_alsa_control_mute.put = volume_alsa_mute_put;
7653 volume_alsa_control_mute.access =
7654 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7655 }
7656
7657 if (!tp_features.mixer_no_level_control) {
7658 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
7659 rc = snd_ctl_add(card, ctl_vol);
7660 if (rc < 0) {
7661 pr_err("Failed to create ALSA volume control: %d\n",
7662 rc);
7663 goto err_exit;
7664 }
7665 data->ctl_vol_id = &ctl_vol->id;
7666 }
7667
7668 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
7669 rc = snd_ctl_add(card, ctl_mute);
7670 if (rc < 0) {
7671 pr_err("Failed to create ALSA mute control: %d\n", rc);
7672 goto err_exit;
7673 }
7674 data->ctl_mute_id = &ctl_mute->id;
7675
7676 rc = snd_card_register(card);
7677 if (rc < 0) {
7678 pr_err("Failed to register ALSA card: %d\n", rc);
7679 goto err_exit;
7680 }
7681
7682 alsa_card = card;
7683 return 0;
7684
7685 err_exit:
7686 snd_card_free(card);
7687 return 1;
7688 }
7689
7690 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
7691 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
7692
7693 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
7694 /* Whitelist volume level on all IBM by default */
7695 { .vendor = PCI_VENDOR_ID_IBM,
7696 .bios = TPACPI_MATCH_ANY,
7697 .ec = TPACPI_MATCH_ANY,
7698 .quirks = TPACPI_VOL_Q_LEVEL },
7699
7700 /* Lenovo models with volume control (needs confirmation) */
7701 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
7702 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
7703 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
7704 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
7705 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
7706 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
7707 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
7708
7709 /* Whitelist mute-only on all Lenovo by default */
7710 { .vendor = PCI_VENDOR_ID_LENOVO,
7711 .bios = TPACPI_MATCH_ANY,
7712 .ec = TPACPI_MATCH_ANY,
7713 .quirks = TPACPI_VOL_Q_MUTEONLY }
7714 };
7715
volume_init(struct ibm_init_struct * iibm)7716 static int __init volume_init(struct ibm_init_struct *iibm)
7717 {
7718 unsigned long quirks;
7719 int rc;
7720
7721 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
7722
7723 mutex_init(&volume_mutex);
7724
7725 /*
7726 * Check for module parameter bogosity, note that we
7727 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
7728 * able to detect "unspecified"
7729 */
7730 if (volume_mode > TPACPI_VOL_MODE_MAX)
7731 return -EINVAL;
7732
7733 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
7734 pr_err("UCMS step volume mode not implemented, please contact %s\n",
7735 TPACPI_MAIL);
7736 return 1;
7737 }
7738
7739 if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
7740 return -EINVAL;
7741
7742 /*
7743 * The ALSA mixer is our primary interface.
7744 * When disabled, don't install the subdriver at all
7745 */
7746 if (!alsa_enable) {
7747 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7748 "ALSA mixer disabled by parameter, not loading volume subdriver...\n");
7749 return 1;
7750 }
7751
7752 quirks = tpacpi_check_quirks(volume_quirk_table,
7753 ARRAY_SIZE(volume_quirk_table));
7754
7755 switch (volume_capabilities) {
7756 case TPACPI_VOL_CAP_AUTO:
7757 if (quirks & TPACPI_VOL_Q_MUTEONLY)
7758 tp_features.mixer_no_level_control = 1;
7759 else if (quirks & TPACPI_VOL_Q_LEVEL)
7760 tp_features.mixer_no_level_control = 0;
7761 else
7762 return 1; /* no mixer */
7763 break;
7764 case TPACPI_VOL_CAP_VOLMUTE:
7765 tp_features.mixer_no_level_control = 0;
7766 break;
7767 case TPACPI_VOL_CAP_MUTEONLY:
7768 tp_features.mixer_no_level_control = 1;
7769 break;
7770 default:
7771 return 1;
7772 }
7773
7774 if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
7775 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7776 "using user-supplied volume_capabilities=%d\n",
7777 volume_capabilities);
7778
7779 if (volume_mode == TPACPI_VOL_MODE_AUTO ||
7780 volume_mode == TPACPI_VOL_MODE_MAX) {
7781 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
7782
7783 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7784 "driver auto-selected volume_mode=%d\n",
7785 volume_mode);
7786 } else {
7787 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7788 "using user-supplied volume_mode=%d\n",
7789 volume_mode);
7790 }
7791
7792 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7793 "mute is supported, volume control is %s\n",
7794 str_supported(!tp_features.mixer_no_level_control));
7795
7796 if (software_mute_requested && volume_set_software_mute(true) == 0) {
7797 software_mute_active = true;
7798 } else {
7799 rc = volume_create_alsa_mixer();
7800 if (rc) {
7801 pr_err("Could not create the ALSA mixer interface\n");
7802 return rc;
7803 }
7804
7805 pr_info("Console audio control enabled, mode: %s\n",
7806 (volume_control_allowed) ?
7807 "override (read/write)" :
7808 "monitor (read only)");
7809 }
7810
7811 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7812 "registering volume hotkeys as change notification\n");
7813 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7814 | TP_ACPI_HKEY_VOLUP_MASK
7815 | TP_ACPI_HKEY_VOLDWN_MASK
7816 | TP_ACPI_HKEY_MUTE_MASK);
7817
7818 return 0;
7819 }
7820
volume_read(struct seq_file * m)7821 static int volume_read(struct seq_file *m)
7822 {
7823 u8 status;
7824
7825 if (volume_get_status(&status) < 0) {
7826 seq_printf(m, "level:\t\tunreadable\n");
7827 } else {
7828 if (tp_features.mixer_no_level_control)
7829 seq_printf(m, "level:\t\tunsupported\n");
7830 else
7831 seq_printf(m, "level:\t\t%d\n",
7832 status & TP_EC_AUDIO_LVL_MSK);
7833
7834 seq_printf(m, "mute:\t\t%s\n",
7835 onoff(status, TP_EC_AUDIO_MUTESW));
7836
7837 if (volume_control_allowed) {
7838 seq_printf(m, "commands:\tunmute, mute\n");
7839 if (!tp_features.mixer_no_level_control) {
7840 seq_printf(m, "commands:\tup, down\n");
7841 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
7842 TP_EC_VOLUME_MAX);
7843 }
7844 }
7845 }
7846
7847 return 0;
7848 }
7849
volume_write(char * buf)7850 static int volume_write(char *buf)
7851 {
7852 u8 s;
7853 u8 new_level, new_mute;
7854 int l;
7855 char *cmd;
7856 int rc;
7857
7858 /*
7859 * We do allow volume control at driver startup, so that the
7860 * user can set initial state through the volume=... parameter hack.
7861 */
7862 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7863 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7864 tp_warned.volume_ctrl_forbidden = 1;
7865 pr_notice("Console audio control in monitor mode, changes are not allowed\n");
7866 pr_notice("Use the volume_control=1 module parameter to enable volume control\n");
7867 }
7868 return -EPERM;
7869 }
7870
7871 rc = volume_get_status(&s);
7872 if (rc < 0)
7873 return rc;
7874
7875 new_level = s & TP_EC_AUDIO_LVL_MSK;
7876 new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
7877
7878 while ((cmd = strsep(&buf, ","))) {
7879 if (!tp_features.mixer_no_level_control) {
7880 if (strlencmp(cmd, "up") == 0) {
7881 if (new_mute)
7882 new_mute = 0;
7883 else if (new_level < TP_EC_VOLUME_MAX)
7884 new_level++;
7885 continue;
7886 } else if (strlencmp(cmd, "down") == 0) {
7887 if (new_mute)
7888 new_mute = 0;
7889 else if (new_level > 0)
7890 new_level--;
7891 continue;
7892 } else if (sscanf(cmd, "level %u", &l) == 1 &&
7893 l >= 0 && l <= TP_EC_VOLUME_MAX) {
7894 new_level = l;
7895 continue;
7896 }
7897 }
7898 if (strlencmp(cmd, "mute") == 0)
7899 new_mute = TP_EC_AUDIO_MUTESW_MSK;
7900 else if (strlencmp(cmd, "unmute") == 0)
7901 new_mute = 0;
7902 else
7903 return -EINVAL;
7904 }
7905
7906 if (tp_features.mixer_no_level_control) {
7907 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7908 new_mute ? "" : "un");
7909 rc = volume_set_mute(!!new_mute);
7910 } else {
7911 tpacpi_disclose_usertask("procfs volume",
7912 "%smute and set level to %d\n",
7913 new_mute ? "" : "un", new_level);
7914 rc = volume_set_status(new_mute | new_level);
7915 }
7916 volume_alsa_notify_change();
7917
7918 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7919 }
7920
7921 static struct ibm_struct volume_driver_data = {
7922 .name = "volume",
7923 .read = volume_read,
7924 .write = volume_write,
7925 .exit = volume_exit,
7926 .suspend = volume_suspend,
7927 .resume = volume_resume,
7928 .shutdown = volume_shutdown,
7929 };
7930
7931 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7932
7933 #define alsa_card NULL
7934
volume_alsa_notify_change(void)7935 static inline void volume_alsa_notify_change(void)
7936 {
7937 }
7938
volume_init(struct ibm_init_struct * iibm)7939 static int __init volume_init(struct ibm_init_struct *iibm)
7940 {
7941 pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7942
7943 return 1;
7944 }
7945
7946 static struct ibm_struct volume_driver_data = {
7947 .name = "volume",
7948 };
7949
7950 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7951
7952 /*************************************************************************
7953 * Fan subdriver
7954 */
7955
7956 /*
7957 * FAN ACCESS MODES
7958 *
7959 * TPACPI_FAN_RD_ACPI_GFAN:
7960 * ACPI GFAN method: returns fan level
7961 *
7962 * see TPACPI_FAN_WR_ACPI_SFAN
7963 * EC 0x2f (HFSP) not available if GFAN exists
7964 *
7965 * TPACPI_FAN_WR_ACPI_SFAN:
7966 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7967 *
7968 * EC 0x2f (HFSP) might be available *for reading*, but do not use
7969 * it for writing.
7970 *
7971 * TPACPI_FAN_WR_TPEC:
7972 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
7973 * Supported on almost all ThinkPads
7974 *
7975 * Fan speed changes of any sort (including those caused by the
7976 * disengaged mode) are usually done slowly by the firmware as the
7977 * maximum amount of fan duty cycle change per second seems to be
7978 * limited.
7979 *
7980 * Reading is not available if GFAN exists.
7981 * Writing is not available if SFAN exists.
7982 *
7983 * Bits
7984 * 7 automatic mode engaged;
7985 * (default operation mode of the ThinkPad)
7986 * fan level is ignored in this mode.
7987 * 6 full speed mode (takes precedence over bit 7);
7988 * not available on all thinkpads. May disable
7989 * the tachometer while the fan controller ramps up
7990 * the speed (which can take up to a few *minutes*).
7991 * Speeds up fan to 100% duty-cycle, which is far above
7992 * the standard RPM levels. It is not impossible that
7993 * it could cause hardware damage.
7994 * 5-3 unused in some models. Extra bits for fan level
7995 * in others, but still useless as all values above
7996 * 7 map to the same speed as level 7 in these models.
7997 * 2-0 fan level (0..7 usually)
7998 * 0x00 = stop
7999 * 0x07 = max (set when temperatures critical)
8000 * Some ThinkPads may have other levels, see
8001 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
8002 *
8003 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
8004 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT
8005 * does so, its initial value is meaningless (0x07).
8006 *
8007 * For firmware bugs, refer to:
8008 * https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
8009 *
8010 * ----
8011 *
8012 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
8013 * Main fan tachometer reading (in RPM)
8014 *
8015 * This register is present on all ThinkPads with a new-style EC, and
8016 * it is known not to be present on the A21m/e, and T22, as there is
8017 * something else in offset 0x84 according to the ACPI DSDT. Other
8018 * ThinkPads from this same time period (and earlier) probably lack the
8019 * tachometer as well.
8020 *
8021 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
8022 * was never fixed by IBM to report the EC firmware version string
8023 * probably support the tachometer (like the early X models), so
8024 * detecting it is quite hard. We need more data to know for sure.
8025 *
8026 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
8027 * might result.
8028 *
8029 * FIRMWARE BUG: may go stale while the EC is switching to full speed
8030 * mode.
8031 *
8032 * For firmware bugs, refer to:
8033 * https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
8034 *
8035 * ----
8036 *
8037 * ThinkPad EC register 0x31 bit 0 (only on select models)
8038 *
8039 * When bit 0 of EC register 0x31 is zero, the tachometer registers
8040 * show the speed of the main fan. When bit 0 of EC register 0x31
8041 * is one, the tachometer registers show the speed of the auxiliary
8042 * fan.
8043 *
8044 * Fan control seems to affect both fans, regardless of the state
8045 * of this bit.
8046 *
8047 * So far, only the firmware for the X60/X61 non-tablet versions
8048 * seem to support this (firmware TP-7M).
8049 *
8050 * TPACPI_FAN_WR_ACPI_FANS:
8051 * ThinkPad X31, X40, X41. Not available in the X60.
8052 *
8053 * FANS ACPI handle: takes three arguments: low speed, medium speed,
8054 * high speed. ACPI DSDT seems to map these three speeds to levels
8055 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
8056 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
8057 *
8058 * The speeds are stored on handles
8059 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
8060 *
8061 * There are three default speed sets, accessible as handles:
8062 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
8063 *
8064 * ACPI DSDT switches which set is in use depending on various
8065 * factors.
8066 *
8067 * TPACPI_FAN_WR_TPEC is also available and should be used to
8068 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
8069 * but the ACPI tables just mention level 7.
8070 */
8071
8072 enum { /* Fan control constants */
8073 fan_status_offset = 0x2f, /* EC register 0x2f */
8074 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
8075 * 0x84 must be read before 0x85 */
8076 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
8077 bit 0 selects which fan is active */
8078
8079 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
8080 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
8081
8082 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
8083 };
8084
8085 enum fan_status_access_mode {
8086 TPACPI_FAN_NONE = 0, /* No fan status or control */
8087 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
8088 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
8089 };
8090
8091 enum fan_control_access_mode {
8092 TPACPI_FAN_WR_NONE = 0, /* No fan control */
8093 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
8094 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
8095 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
8096 };
8097
8098 enum fan_control_commands {
8099 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
8100 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
8101 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
8102 * and also watchdog cmd */
8103 };
8104
8105 static bool fan_control_allowed;
8106
8107 static enum fan_status_access_mode fan_status_access_mode;
8108 static enum fan_control_access_mode fan_control_access_mode;
8109 static enum fan_control_commands fan_control_commands;
8110
8111 static u8 fan_control_initial_status;
8112 static u8 fan_control_desired_level;
8113 static u8 fan_control_resume_level;
8114 static int fan_watchdog_maxinterval;
8115
8116 static struct mutex fan_mutex;
8117
8118 static void fan_watchdog_fire(struct work_struct *ignored);
8119 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
8120
8121 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
8122 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
8123 "\\FSPD", /* 600e/x, 770e, 770x */
8124 ); /* all others */
8125 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
8126 "JFNS", /* 770x-JL */
8127 ); /* all others */
8128
8129 /*
8130 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
8131 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
8132 * be in auto mode (0x80).
8133 *
8134 * This is corrected by any write to HFSP either by the driver, or
8135 * by the firmware.
8136 *
8137 * We assume 0x07 really means auto mode while this quirk is active,
8138 * as this is far more likely than the ThinkPad being in level 7,
8139 * which is only used by the firmware during thermal emergencies.
8140 *
8141 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
8142 * TP-70 (T43, R52), which are known to be buggy.
8143 */
8144
fan_quirk1_setup(void)8145 static void fan_quirk1_setup(void)
8146 {
8147 if (fan_control_initial_status == 0x07) {
8148 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n");
8149 tp_features.fan_ctrl_status_undef = 1;
8150 }
8151 }
8152
fan_quirk1_handle(u8 * fan_status)8153 static void fan_quirk1_handle(u8 *fan_status)
8154 {
8155 if (unlikely(tp_features.fan_ctrl_status_undef)) {
8156 if (*fan_status != fan_control_initial_status) {
8157 /* something changed the HFSP regisnter since
8158 * driver init time, so it is not undefined
8159 * anymore */
8160 tp_features.fan_ctrl_status_undef = 0;
8161 } else {
8162 /* Return most likely status. In fact, it
8163 * might be the only possible status */
8164 *fan_status = TP_EC_FAN_AUTO;
8165 }
8166 }
8167 }
8168
8169 /* Select main fan on X60/X61, NOOP on others */
fan_select_fan1(void)8170 static bool fan_select_fan1(void)
8171 {
8172 if (tp_features.second_fan) {
8173 u8 val;
8174
8175 if (ec_read(fan_select_offset, &val) < 0)
8176 return false;
8177 val &= 0xFEU;
8178 if (ec_write(fan_select_offset, val) < 0)
8179 return false;
8180 }
8181 return true;
8182 }
8183
8184 /* Select secondary fan on X60/X61 */
fan_select_fan2(void)8185 static bool fan_select_fan2(void)
8186 {
8187 u8 val;
8188
8189 if (!tp_features.second_fan)
8190 return false;
8191
8192 if (ec_read(fan_select_offset, &val) < 0)
8193 return false;
8194 val |= 0x01U;
8195 if (ec_write(fan_select_offset, val) < 0)
8196 return false;
8197
8198 return true;
8199 }
8200
8201 /*
8202 * Call with fan_mutex held
8203 */
fan_update_desired_level(u8 status)8204 static void fan_update_desired_level(u8 status)
8205 {
8206 if ((status &
8207 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8208 if (status > 7)
8209 fan_control_desired_level = 7;
8210 else
8211 fan_control_desired_level = status;
8212 }
8213 }
8214
fan_get_status(u8 * status)8215 static int fan_get_status(u8 *status)
8216 {
8217 u8 s;
8218
8219 /* TODO:
8220 * Add TPACPI_FAN_RD_ACPI_FANS ? */
8221
8222 switch (fan_status_access_mode) {
8223 case TPACPI_FAN_RD_ACPI_GFAN: {
8224 /* 570, 600e/x, 770e, 770x */
8225 int res;
8226
8227 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
8228 return -EIO;
8229
8230 if (likely(status))
8231 *status = res & 0x07;
8232
8233 break;
8234 }
8235 case TPACPI_FAN_RD_TPEC:
8236 /* all except 570, 600e/x, 770e, 770x */
8237 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
8238 return -EIO;
8239
8240 if (likely(status)) {
8241 *status = s;
8242 fan_quirk1_handle(status);
8243 }
8244
8245 break;
8246
8247 default:
8248 return -ENXIO;
8249 }
8250
8251 return 0;
8252 }
8253
fan_get_status_safe(u8 * status)8254 static int fan_get_status_safe(u8 *status)
8255 {
8256 int rc;
8257 u8 s;
8258
8259 if (mutex_lock_killable(&fan_mutex))
8260 return -ERESTARTSYS;
8261 rc = fan_get_status(&s);
8262 if (!rc)
8263 fan_update_desired_level(s);
8264 mutex_unlock(&fan_mutex);
8265
8266 if (rc)
8267 return rc;
8268 if (status)
8269 *status = s;
8270
8271 return 0;
8272 }
8273
fan_get_speed(unsigned int * speed)8274 static int fan_get_speed(unsigned int *speed)
8275 {
8276 u8 hi, lo;
8277
8278 switch (fan_status_access_mode) {
8279 case TPACPI_FAN_RD_TPEC:
8280 /* all except 570, 600e/x, 770e, 770x */
8281 if (unlikely(!fan_select_fan1()))
8282 return -EIO;
8283 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
8284 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
8285 return -EIO;
8286
8287 if (likely(speed))
8288 *speed = (hi << 8) | lo;
8289
8290 break;
8291
8292 default:
8293 return -ENXIO;
8294 }
8295
8296 return 0;
8297 }
8298
fan2_get_speed(unsigned int * speed)8299 static int fan2_get_speed(unsigned int *speed)
8300 {
8301 u8 hi, lo;
8302 bool rc;
8303
8304 switch (fan_status_access_mode) {
8305 case TPACPI_FAN_RD_TPEC:
8306 /* all except 570, 600e/x, 770e, 770x */
8307 if (unlikely(!fan_select_fan2()))
8308 return -EIO;
8309 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
8310 !acpi_ec_read(fan_rpm_offset + 1, &hi);
8311 fan_select_fan1(); /* play it safe */
8312 if (rc)
8313 return -EIO;
8314
8315 if (likely(speed))
8316 *speed = (hi << 8) | lo;
8317
8318 break;
8319
8320 default:
8321 return -ENXIO;
8322 }
8323
8324 return 0;
8325 }
8326
fan_set_level(int level)8327 static int fan_set_level(int level)
8328 {
8329 if (!fan_control_allowed)
8330 return -EPERM;
8331
8332 switch (fan_control_access_mode) {
8333 case TPACPI_FAN_WR_ACPI_SFAN:
8334 if ((level < 0) || (level > 7))
8335 return -EINVAL;
8336
8337 if (tp_features.second_fan_ctl) {
8338 if (!fan_select_fan2() ||
8339 !acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) {
8340 pr_warn("Couldn't set 2nd fan level, disabling support\n");
8341 tp_features.second_fan_ctl = 0;
8342 }
8343 fan_select_fan1();
8344 }
8345 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
8346 return -EIO;
8347 break;
8348
8349 case TPACPI_FAN_WR_ACPI_FANS:
8350 case TPACPI_FAN_WR_TPEC:
8351 if (!(level & TP_EC_FAN_AUTO) &&
8352 !(level & TP_EC_FAN_FULLSPEED) &&
8353 ((level < 0) || (level > 7)))
8354 return -EINVAL;
8355
8356 /* safety net should the EC not support AUTO
8357 * or FULLSPEED mode bits and just ignore them */
8358 if (level & TP_EC_FAN_FULLSPEED)
8359 level |= 7; /* safety min speed 7 */
8360 else if (level & TP_EC_FAN_AUTO)
8361 level |= 4; /* safety min speed 4 */
8362
8363 if (tp_features.second_fan_ctl) {
8364 if (!fan_select_fan2() ||
8365 !acpi_ec_write(fan_status_offset, level)) {
8366 pr_warn("Couldn't set 2nd fan level, disabling support\n");
8367 tp_features.second_fan_ctl = 0;
8368 }
8369 fan_select_fan1();
8370
8371 }
8372 if (!acpi_ec_write(fan_status_offset, level))
8373 return -EIO;
8374 else
8375 tp_features.fan_ctrl_status_undef = 0;
8376 break;
8377
8378 default:
8379 return -ENXIO;
8380 }
8381
8382 vdbg_printk(TPACPI_DBG_FAN,
8383 "fan control: set fan control register to 0x%02x\n", level);
8384 return 0;
8385 }
8386
fan_set_level_safe(int level)8387 static int fan_set_level_safe(int level)
8388 {
8389 int rc;
8390
8391 if (!fan_control_allowed)
8392 return -EPERM;
8393
8394 if (mutex_lock_killable(&fan_mutex))
8395 return -ERESTARTSYS;
8396
8397 if (level == TPACPI_FAN_LAST_LEVEL)
8398 level = fan_control_desired_level;
8399
8400 rc = fan_set_level(level);
8401 if (!rc)
8402 fan_update_desired_level(level);
8403
8404 mutex_unlock(&fan_mutex);
8405 return rc;
8406 }
8407
fan_set_enable(void)8408 static int fan_set_enable(void)
8409 {
8410 u8 s;
8411 int rc;
8412
8413 if (!fan_control_allowed)
8414 return -EPERM;
8415
8416 if (mutex_lock_killable(&fan_mutex))
8417 return -ERESTARTSYS;
8418
8419 switch (fan_control_access_mode) {
8420 case TPACPI_FAN_WR_ACPI_FANS:
8421 case TPACPI_FAN_WR_TPEC:
8422 rc = fan_get_status(&s);
8423 if (rc < 0)
8424 break;
8425
8426 /* Don't go out of emergency fan mode */
8427 if (s != 7) {
8428 s &= 0x07;
8429 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
8430 }
8431
8432 if (!acpi_ec_write(fan_status_offset, s))
8433 rc = -EIO;
8434 else {
8435 tp_features.fan_ctrl_status_undef = 0;
8436 rc = 0;
8437 }
8438 break;
8439
8440 case TPACPI_FAN_WR_ACPI_SFAN:
8441 rc = fan_get_status(&s);
8442 if (rc < 0)
8443 break;
8444
8445 s &= 0x07;
8446
8447 /* Set fan to at least level 4 */
8448 s |= 4;
8449
8450 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
8451 rc = -EIO;
8452 else
8453 rc = 0;
8454 break;
8455
8456 default:
8457 rc = -ENXIO;
8458 }
8459
8460 mutex_unlock(&fan_mutex);
8461
8462 if (!rc)
8463 vdbg_printk(TPACPI_DBG_FAN,
8464 "fan control: set fan control register to 0x%02x\n",
8465 s);
8466 return rc;
8467 }
8468
fan_set_disable(void)8469 static int fan_set_disable(void)
8470 {
8471 int rc;
8472
8473 if (!fan_control_allowed)
8474 return -EPERM;
8475
8476 if (mutex_lock_killable(&fan_mutex))
8477 return -ERESTARTSYS;
8478
8479 rc = 0;
8480 switch (fan_control_access_mode) {
8481 case TPACPI_FAN_WR_ACPI_FANS:
8482 case TPACPI_FAN_WR_TPEC:
8483 if (!acpi_ec_write(fan_status_offset, 0x00))
8484 rc = -EIO;
8485 else {
8486 fan_control_desired_level = 0;
8487 tp_features.fan_ctrl_status_undef = 0;
8488 }
8489 break;
8490
8491 case TPACPI_FAN_WR_ACPI_SFAN:
8492 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
8493 rc = -EIO;
8494 else
8495 fan_control_desired_level = 0;
8496 break;
8497
8498 default:
8499 rc = -ENXIO;
8500 }
8501
8502 if (!rc)
8503 vdbg_printk(TPACPI_DBG_FAN,
8504 "fan control: set fan control register to 0\n");
8505
8506 mutex_unlock(&fan_mutex);
8507 return rc;
8508 }
8509
fan_set_speed(int speed)8510 static int fan_set_speed(int speed)
8511 {
8512 int rc;
8513
8514 if (!fan_control_allowed)
8515 return -EPERM;
8516
8517 if (mutex_lock_killable(&fan_mutex))
8518 return -ERESTARTSYS;
8519
8520 rc = 0;
8521 switch (fan_control_access_mode) {
8522 case TPACPI_FAN_WR_ACPI_FANS:
8523 if (speed >= 0 && speed <= 65535) {
8524 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
8525 speed, speed, speed))
8526 rc = -EIO;
8527 } else
8528 rc = -EINVAL;
8529 break;
8530
8531 default:
8532 rc = -ENXIO;
8533 }
8534
8535 mutex_unlock(&fan_mutex);
8536 return rc;
8537 }
8538
fan_watchdog_reset(void)8539 static void fan_watchdog_reset(void)
8540 {
8541 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
8542 return;
8543
8544 if (fan_watchdog_maxinterval > 0 &&
8545 tpacpi_lifecycle != TPACPI_LIFE_EXITING)
8546 mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
8547 msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
8548 else
8549 cancel_delayed_work(&fan_watchdog_task);
8550 }
8551
fan_watchdog_fire(struct work_struct * ignored)8552 static void fan_watchdog_fire(struct work_struct *ignored)
8553 {
8554 int rc;
8555
8556 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
8557 return;
8558
8559 pr_notice("fan watchdog: enabling fan\n");
8560 rc = fan_set_enable();
8561 if (rc < 0) {
8562 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n",
8563 rc);
8564 /* reschedule for later */
8565 fan_watchdog_reset();
8566 }
8567 }
8568
8569 /*
8570 * SYSFS fan layout: hwmon compatible (device)
8571 *
8572 * pwm*_enable:
8573 * 0: "disengaged" mode
8574 * 1: manual mode
8575 * 2: native EC "auto" mode (recommended, hardware default)
8576 *
8577 * pwm*: set speed in manual mode, ignored otherwise.
8578 * 0 is level 0; 255 is level 7. Intermediate points done with linear
8579 * interpolation.
8580 *
8581 * fan*_input: tachometer reading, RPM
8582 *
8583 *
8584 * SYSFS fan layout: extensions
8585 *
8586 * fan_watchdog (driver):
8587 * fan watchdog interval in seconds, 0 disables (default), max 120
8588 */
8589
8590 /* sysfs fan pwm1_enable ----------------------------------------------- */
fan_pwm1_enable_show(struct device * dev,struct device_attribute * attr,char * buf)8591 static ssize_t fan_pwm1_enable_show(struct device *dev,
8592 struct device_attribute *attr,
8593 char *buf)
8594 {
8595 int res, mode;
8596 u8 status;
8597
8598 res = fan_get_status_safe(&status);
8599 if (res)
8600 return res;
8601
8602 if (status & TP_EC_FAN_FULLSPEED) {
8603 mode = 0;
8604 } else if (status & TP_EC_FAN_AUTO) {
8605 mode = 2;
8606 } else
8607 mode = 1;
8608
8609 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
8610 }
8611
fan_pwm1_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)8612 static ssize_t fan_pwm1_enable_store(struct device *dev,
8613 struct device_attribute *attr,
8614 const char *buf, size_t count)
8615 {
8616 unsigned long t;
8617 int res, level;
8618
8619 if (parse_strtoul(buf, 2, &t))
8620 return -EINVAL;
8621
8622 tpacpi_disclose_usertask("hwmon pwm1_enable",
8623 "set fan mode to %lu\n", t);
8624
8625 switch (t) {
8626 case 0:
8627 level = TP_EC_FAN_FULLSPEED;
8628 break;
8629 case 1:
8630 level = TPACPI_FAN_LAST_LEVEL;
8631 break;
8632 case 2:
8633 level = TP_EC_FAN_AUTO;
8634 break;
8635 case 3:
8636 /* reserved for software-controlled auto mode */
8637 return -ENOSYS;
8638 default:
8639 return -EINVAL;
8640 }
8641
8642 res = fan_set_level_safe(level);
8643 if (res == -ENXIO)
8644 return -EINVAL;
8645 else if (res < 0)
8646 return res;
8647
8648 fan_watchdog_reset();
8649
8650 return count;
8651 }
8652
8653 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
8654 fan_pwm1_enable_show, fan_pwm1_enable_store);
8655
8656 /* sysfs fan pwm1 ------------------------------------------------------ */
fan_pwm1_show(struct device * dev,struct device_attribute * attr,char * buf)8657 static ssize_t fan_pwm1_show(struct device *dev,
8658 struct device_attribute *attr,
8659 char *buf)
8660 {
8661 int res;
8662 u8 status;
8663
8664 res = fan_get_status_safe(&status);
8665 if (res)
8666 return res;
8667
8668 if ((status &
8669 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
8670 status = fan_control_desired_level;
8671
8672 if (status > 7)
8673 status = 7;
8674
8675 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
8676 }
8677
fan_pwm1_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)8678 static ssize_t fan_pwm1_store(struct device *dev,
8679 struct device_attribute *attr,
8680 const char *buf, size_t count)
8681 {
8682 unsigned long s;
8683 int rc;
8684 u8 status, newlevel;
8685
8686 if (parse_strtoul(buf, 255, &s))
8687 return -EINVAL;
8688
8689 tpacpi_disclose_usertask("hwmon pwm1",
8690 "set fan speed to %lu\n", s);
8691
8692 /* scale down from 0-255 to 0-7 */
8693 newlevel = (s >> 5) & 0x07;
8694
8695 if (mutex_lock_killable(&fan_mutex))
8696 return -ERESTARTSYS;
8697
8698 rc = fan_get_status(&status);
8699 if (!rc && (status &
8700 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8701 rc = fan_set_level(newlevel);
8702 if (rc == -ENXIO)
8703 rc = -EINVAL;
8704 else if (!rc) {
8705 fan_update_desired_level(newlevel);
8706 fan_watchdog_reset();
8707 }
8708 }
8709
8710 mutex_unlock(&fan_mutex);
8711 return (rc) ? rc : count;
8712 }
8713
8714 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store);
8715
8716 /* sysfs fan fan1_input ------------------------------------------------ */
fan_fan1_input_show(struct device * dev,struct device_attribute * attr,char * buf)8717 static ssize_t fan_fan1_input_show(struct device *dev,
8718 struct device_attribute *attr,
8719 char *buf)
8720 {
8721 int res;
8722 unsigned int speed;
8723
8724 res = fan_get_speed(&speed);
8725 if (res < 0)
8726 return res;
8727
8728 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
8729 }
8730
8731 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL);
8732
8733 /* sysfs fan fan2_input ------------------------------------------------ */
fan_fan2_input_show(struct device * dev,struct device_attribute * attr,char * buf)8734 static ssize_t fan_fan2_input_show(struct device *dev,
8735 struct device_attribute *attr,
8736 char *buf)
8737 {
8738 int res;
8739 unsigned int speed;
8740
8741 res = fan2_get_speed(&speed);
8742 if (res < 0)
8743 return res;
8744
8745 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
8746 }
8747
8748 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL);
8749
8750 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
fan_watchdog_show(struct device_driver * drv,char * buf)8751 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf)
8752 {
8753 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
8754 }
8755
fan_watchdog_store(struct device_driver * drv,const char * buf,size_t count)8756 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf,
8757 size_t count)
8758 {
8759 unsigned long t;
8760
8761 if (parse_strtoul(buf, 120, &t))
8762 return -EINVAL;
8763
8764 if (!fan_control_allowed)
8765 return -EPERM;
8766
8767 fan_watchdog_maxinterval = t;
8768 fan_watchdog_reset();
8769
8770 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
8771
8772 return count;
8773 }
8774 static DRIVER_ATTR_RW(fan_watchdog);
8775
8776 /* --------------------------------------------------------------------- */
8777 static struct attribute *fan_attributes[] = {
8778 &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr,
8779 &dev_attr_fan1_input.attr,
8780 NULL, /* for fan2_input */
8781 NULL
8782 };
8783
8784 static const struct attribute_group fan_attr_group = {
8785 .attrs = fan_attributes,
8786 };
8787
8788 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
8789 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
8790 #define TPACPI_FAN_2CTL 0x0004 /* selects fan2 control */
8791
8792 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
8793 TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1),
8794 TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1),
8795 TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1),
8796 TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1),
8797 TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN),
8798 TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN),
8799 TPACPI_Q_LNV3('N', '1', 'D', TPACPI_FAN_2CTL), /* P70 */
8800 TPACPI_Q_LNV3('N', '1', 'E', TPACPI_FAN_2CTL), /* P50 */
8801 TPACPI_Q_LNV3('N', '1', 'T', TPACPI_FAN_2CTL), /* P71 */
8802 TPACPI_Q_LNV3('N', '1', 'U', TPACPI_FAN_2CTL), /* P51 */
8803 TPACPI_Q_LNV3('N', '2', 'C', TPACPI_FAN_2CTL), /* P52 / P72 */
8804 TPACPI_Q_LNV3('N', '2', 'N', TPACPI_FAN_2CTL), /* P53 / P73 */
8805 TPACPI_Q_LNV3('N', '2', 'E', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (1st gen) */
8806 TPACPI_Q_LNV3('N', '2', 'O', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (2nd gen) */
8807 TPACPI_Q_LNV3('N', '2', 'V', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (3nd gen) */
8808 TPACPI_Q_LNV3('N', '3', '0', TPACPI_FAN_2CTL), /* P15 (1st gen) / P15v (1st gen) */
8809 TPACPI_Q_LNV3('N', '3', '2', TPACPI_FAN_2CTL), /* X1 Carbon (9th gen) */
8810 };
8811
fan_init(struct ibm_init_struct * iibm)8812 static int __init fan_init(struct ibm_init_struct *iibm)
8813 {
8814 int rc;
8815 unsigned long quirks;
8816
8817 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8818 "initializing fan subdriver\n");
8819
8820 mutex_init(&fan_mutex);
8821 fan_status_access_mode = TPACPI_FAN_NONE;
8822 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8823 fan_control_commands = 0;
8824 fan_watchdog_maxinterval = 0;
8825 tp_features.fan_ctrl_status_undef = 0;
8826 tp_features.second_fan = 0;
8827 tp_features.second_fan_ctl = 0;
8828 fan_control_desired_level = 7;
8829
8830 if (tpacpi_is_ibm()) {
8831 TPACPI_ACPIHANDLE_INIT(fans);
8832 TPACPI_ACPIHANDLE_INIT(gfan);
8833 TPACPI_ACPIHANDLE_INIT(sfan);
8834 }
8835
8836 quirks = tpacpi_check_quirks(fan_quirk_table,
8837 ARRAY_SIZE(fan_quirk_table));
8838
8839 if (gfan_handle) {
8840 /* 570, 600e/x, 770e, 770x */
8841 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
8842 } else {
8843 /* all other ThinkPads: note that even old-style
8844 * ThinkPad ECs supports the fan control register */
8845 if (likely(acpi_ec_read(fan_status_offset,
8846 &fan_control_initial_status))) {
8847 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
8848 if (quirks & TPACPI_FAN_Q1)
8849 fan_quirk1_setup();
8850 if (quirks & TPACPI_FAN_2FAN) {
8851 tp_features.second_fan = 1;
8852 pr_info("secondary fan support enabled\n");
8853 }
8854 if (quirks & TPACPI_FAN_2CTL) {
8855 tp_features.second_fan = 1;
8856 tp_features.second_fan_ctl = 1;
8857 pr_info("secondary fan control enabled\n");
8858 }
8859 } else {
8860 pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n");
8861 return 1;
8862 }
8863 }
8864
8865 if (sfan_handle) {
8866 /* 570, 770x-JL */
8867 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8868 fan_control_commands |=
8869 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8870 } else {
8871 if (!gfan_handle) {
8872 /* gfan without sfan means no fan control */
8873 /* all other models implement TP EC 0x2f control */
8874
8875 if (fans_handle) {
8876 /* X31, X40, X41 */
8877 fan_control_access_mode =
8878 TPACPI_FAN_WR_ACPI_FANS;
8879 fan_control_commands |=
8880 TPACPI_FAN_CMD_SPEED |
8881 TPACPI_FAN_CMD_LEVEL |
8882 TPACPI_FAN_CMD_ENABLE;
8883 } else {
8884 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8885 fan_control_commands |=
8886 TPACPI_FAN_CMD_LEVEL |
8887 TPACPI_FAN_CMD_ENABLE;
8888 }
8889 }
8890 }
8891
8892 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8893 "fan is %s, modes %d, %d\n",
8894 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8895 fan_control_access_mode != TPACPI_FAN_WR_NONE),
8896 fan_status_access_mode, fan_control_access_mode);
8897
8898 /* fan control master switch */
8899 if (!fan_control_allowed) {
8900 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8901 fan_control_commands = 0;
8902 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8903 "fan control features disabled by parameter\n");
8904 }
8905
8906 /* update fan_control_desired_level */
8907 if (fan_status_access_mode != TPACPI_FAN_NONE)
8908 fan_get_status_safe(NULL);
8909
8910 if (fan_status_access_mode != TPACPI_FAN_NONE ||
8911 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8912 if (tp_features.second_fan) {
8913 /* attach second fan tachometer */
8914 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8915 &dev_attr_fan2_input.attr;
8916 }
8917 rc = sysfs_create_group(&tpacpi_hwmon->kobj,
8918 &fan_attr_group);
8919 if (rc < 0)
8920 return rc;
8921
8922 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8923 &driver_attr_fan_watchdog);
8924 if (rc < 0) {
8925 sysfs_remove_group(&tpacpi_hwmon->kobj,
8926 &fan_attr_group);
8927 return rc;
8928 }
8929 return 0;
8930 } else
8931 return 1;
8932 }
8933
fan_exit(void)8934 static void fan_exit(void)
8935 {
8936 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8937 "cancelling any pending fan watchdog tasks\n");
8938
8939 /* FIXME: can we really do this unconditionally? */
8940 sysfs_remove_group(&tpacpi_hwmon->kobj, &fan_attr_group);
8941 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8942 &driver_attr_fan_watchdog);
8943
8944 cancel_delayed_work(&fan_watchdog_task);
8945 flush_workqueue(tpacpi_wq);
8946 }
8947
fan_suspend(void)8948 static void fan_suspend(void)
8949 {
8950 int rc;
8951
8952 if (!fan_control_allowed)
8953 return;
8954
8955 /* Store fan status in cache */
8956 fan_control_resume_level = 0;
8957 rc = fan_get_status_safe(&fan_control_resume_level);
8958 if (rc < 0)
8959 pr_notice("failed to read fan level for later restore during resume: %d\n",
8960 rc);
8961
8962 /* if it is undefined, don't attempt to restore it.
8963 * KEEP THIS LAST */
8964 if (tp_features.fan_ctrl_status_undef)
8965 fan_control_resume_level = 0;
8966 }
8967
fan_resume(void)8968 static void fan_resume(void)
8969 {
8970 u8 current_level = 7;
8971 bool do_set = false;
8972 int rc;
8973
8974 /* DSDT *always* updates status on resume */
8975 tp_features.fan_ctrl_status_undef = 0;
8976
8977 if (!fan_control_allowed ||
8978 !fan_control_resume_level ||
8979 (fan_get_status_safe(¤t_level) < 0))
8980 return;
8981
8982 switch (fan_control_access_mode) {
8983 case TPACPI_FAN_WR_ACPI_SFAN:
8984 /* never decrease fan level */
8985 do_set = (fan_control_resume_level > current_level);
8986 break;
8987 case TPACPI_FAN_WR_ACPI_FANS:
8988 case TPACPI_FAN_WR_TPEC:
8989 /* never decrease fan level, scale is:
8990 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8991 *
8992 * We expect the firmware to set either 7 or AUTO, but we
8993 * handle FULLSPEED out of paranoia.
8994 *
8995 * So, we can safely only restore FULLSPEED or 7, anything
8996 * else could slow the fan. Restoring AUTO is useless, at
8997 * best that's exactly what the DSDT already set (it is the
8998 * slower it uses).
8999 *
9000 * Always keep in mind that the DSDT *will* have set the
9001 * fans to what the vendor supposes is the best level. We
9002 * muck with it only to speed the fan up.
9003 */
9004 if (fan_control_resume_level != 7 &&
9005 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
9006 return;
9007 else
9008 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
9009 (current_level != fan_control_resume_level);
9010 break;
9011 default:
9012 return;
9013 }
9014 if (do_set) {
9015 pr_notice("restoring fan level to 0x%02x\n",
9016 fan_control_resume_level);
9017 rc = fan_set_level_safe(fan_control_resume_level);
9018 if (rc < 0)
9019 pr_notice("failed to restore fan level: %d\n", rc);
9020 }
9021 }
9022
fan_read(struct seq_file * m)9023 static int fan_read(struct seq_file *m)
9024 {
9025 int rc;
9026 u8 status;
9027 unsigned int speed = 0;
9028
9029 switch (fan_status_access_mode) {
9030 case TPACPI_FAN_RD_ACPI_GFAN:
9031 /* 570, 600e/x, 770e, 770x */
9032 rc = fan_get_status_safe(&status);
9033 if (rc < 0)
9034 return rc;
9035
9036 seq_printf(m, "status:\t\t%s\n"
9037 "level:\t\t%d\n",
9038 (status != 0) ? "enabled" : "disabled", status);
9039 break;
9040
9041 case TPACPI_FAN_RD_TPEC:
9042 /* all except 570, 600e/x, 770e, 770x */
9043 rc = fan_get_status_safe(&status);
9044 if (rc < 0)
9045 return rc;
9046
9047 seq_printf(m, "status:\t\t%s\n",
9048 (status != 0) ? "enabled" : "disabled");
9049
9050 rc = fan_get_speed(&speed);
9051 if (rc < 0)
9052 return rc;
9053
9054 seq_printf(m, "speed:\t\t%d\n", speed);
9055
9056 if (status & TP_EC_FAN_FULLSPEED)
9057 /* Disengaged mode takes precedence */
9058 seq_printf(m, "level:\t\tdisengaged\n");
9059 else if (status & TP_EC_FAN_AUTO)
9060 seq_printf(m, "level:\t\tauto\n");
9061 else
9062 seq_printf(m, "level:\t\t%d\n", status);
9063 break;
9064
9065 case TPACPI_FAN_NONE:
9066 default:
9067 seq_printf(m, "status:\t\tnot supported\n");
9068 }
9069
9070 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
9071 seq_printf(m, "commands:\tlevel <level>");
9072
9073 switch (fan_control_access_mode) {
9074 case TPACPI_FAN_WR_ACPI_SFAN:
9075 seq_printf(m, " (<level> is 0-7)\n");
9076 break;
9077
9078 default:
9079 seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n");
9080 break;
9081 }
9082 }
9083
9084 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
9085 seq_printf(m, "commands:\tenable, disable\n"
9086 "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n");
9087
9088 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
9089 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n");
9090
9091 return 0;
9092 }
9093
fan_write_cmd_level(const char * cmd,int * rc)9094 static int fan_write_cmd_level(const char *cmd, int *rc)
9095 {
9096 int level;
9097
9098 if (strlencmp(cmd, "level auto") == 0)
9099 level = TP_EC_FAN_AUTO;
9100 else if ((strlencmp(cmd, "level disengaged") == 0) |
9101 (strlencmp(cmd, "level full-speed") == 0))
9102 level = TP_EC_FAN_FULLSPEED;
9103 else if (sscanf(cmd, "level %d", &level) != 1)
9104 return 0;
9105
9106 *rc = fan_set_level_safe(level);
9107 if (*rc == -ENXIO)
9108 pr_err("level command accepted for unsupported access mode %d\n",
9109 fan_control_access_mode);
9110 else if (!*rc)
9111 tpacpi_disclose_usertask("procfs fan",
9112 "set level to %d\n", level);
9113
9114 return 1;
9115 }
9116
fan_write_cmd_enable(const char * cmd,int * rc)9117 static int fan_write_cmd_enable(const char *cmd, int *rc)
9118 {
9119 if (strlencmp(cmd, "enable") != 0)
9120 return 0;
9121
9122 *rc = fan_set_enable();
9123 if (*rc == -ENXIO)
9124 pr_err("enable command accepted for unsupported access mode %d\n",
9125 fan_control_access_mode);
9126 else if (!*rc)
9127 tpacpi_disclose_usertask("procfs fan", "enable\n");
9128
9129 return 1;
9130 }
9131
fan_write_cmd_disable(const char * cmd,int * rc)9132 static int fan_write_cmd_disable(const char *cmd, int *rc)
9133 {
9134 if (strlencmp(cmd, "disable") != 0)
9135 return 0;
9136
9137 *rc = fan_set_disable();
9138 if (*rc == -ENXIO)
9139 pr_err("disable command accepted for unsupported access mode %d\n",
9140 fan_control_access_mode);
9141 else if (!*rc)
9142 tpacpi_disclose_usertask("procfs fan", "disable\n");
9143
9144 return 1;
9145 }
9146
fan_write_cmd_speed(const char * cmd,int * rc)9147 static int fan_write_cmd_speed(const char *cmd, int *rc)
9148 {
9149 int speed;
9150
9151 /* TODO:
9152 * Support speed <low> <medium> <high> ? */
9153
9154 if (sscanf(cmd, "speed %d", &speed) != 1)
9155 return 0;
9156
9157 *rc = fan_set_speed(speed);
9158 if (*rc == -ENXIO)
9159 pr_err("speed command accepted for unsupported access mode %d\n",
9160 fan_control_access_mode);
9161 else if (!*rc)
9162 tpacpi_disclose_usertask("procfs fan",
9163 "set speed to %d\n", speed);
9164
9165 return 1;
9166 }
9167
fan_write_cmd_watchdog(const char * cmd,int * rc)9168 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
9169 {
9170 int interval;
9171
9172 if (sscanf(cmd, "watchdog %d", &interval) != 1)
9173 return 0;
9174
9175 if (interval < 0 || interval > 120)
9176 *rc = -EINVAL;
9177 else {
9178 fan_watchdog_maxinterval = interval;
9179 tpacpi_disclose_usertask("procfs fan",
9180 "set watchdog timer to %d\n",
9181 interval);
9182 }
9183
9184 return 1;
9185 }
9186
fan_write(char * buf)9187 static int fan_write(char *buf)
9188 {
9189 char *cmd;
9190 int rc = 0;
9191
9192 while (!rc && (cmd = strsep(&buf, ","))) {
9193 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
9194 fan_write_cmd_level(cmd, &rc)) &&
9195 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
9196 (fan_write_cmd_enable(cmd, &rc) ||
9197 fan_write_cmd_disable(cmd, &rc) ||
9198 fan_write_cmd_watchdog(cmd, &rc))) &&
9199 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
9200 fan_write_cmd_speed(cmd, &rc))
9201 )
9202 rc = -EINVAL;
9203 else if (!rc)
9204 fan_watchdog_reset();
9205 }
9206
9207 return rc;
9208 }
9209
9210 static struct ibm_struct fan_driver_data = {
9211 .name = "fan",
9212 .read = fan_read,
9213 .write = fan_write,
9214 .exit = fan_exit,
9215 .suspend = fan_suspend,
9216 .resume = fan_resume,
9217 };
9218
9219 /*************************************************************************
9220 * Mute LED subdriver
9221 */
9222
9223 #define TPACPI_LED_MAX 2
9224
9225 struct tp_led_table {
9226 acpi_string name;
9227 int on_value;
9228 int off_value;
9229 int state;
9230 };
9231
9232 static struct tp_led_table led_tables[TPACPI_LED_MAX] = {
9233 [LED_AUDIO_MUTE] = {
9234 .name = "SSMS",
9235 .on_value = 1,
9236 .off_value = 0,
9237 },
9238 [LED_AUDIO_MICMUTE] = {
9239 .name = "MMTS",
9240 .on_value = 2,
9241 .off_value = 0,
9242 },
9243 };
9244
mute_led_on_off(struct tp_led_table * t,bool state)9245 static int mute_led_on_off(struct tp_led_table *t, bool state)
9246 {
9247 acpi_handle temp;
9248 int output;
9249
9250 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9251 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name);
9252 return -EIO;
9253 }
9254
9255 if (!acpi_evalf(hkey_handle, &output, t->name, "dd",
9256 state ? t->on_value : t->off_value))
9257 return -EIO;
9258
9259 t->state = state;
9260 return state;
9261 }
9262
tpacpi_led_set(int whichled,bool on)9263 static int tpacpi_led_set(int whichled, bool on)
9264 {
9265 struct tp_led_table *t;
9266
9267 t = &led_tables[whichled];
9268 if (t->state < 0 || t->state == on)
9269 return t->state;
9270 return mute_led_on_off(t, on);
9271 }
9272
tpacpi_led_mute_set(struct led_classdev * led_cdev,enum led_brightness brightness)9273 static int tpacpi_led_mute_set(struct led_classdev *led_cdev,
9274 enum led_brightness brightness)
9275 {
9276 return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF);
9277 }
9278
tpacpi_led_micmute_set(struct led_classdev * led_cdev,enum led_brightness brightness)9279 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev,
9280 enum led_brightness brightness)
9281 {
9282 return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF);
9283 }
9284
9285 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = {
9286 [LED_AUDIO_MUTE] = {
9287 .name = "platform::mute",
9288 .max_brightness = 1,
9289 .brightness_set_blocking = tpacpi_led_mute_set,
9290 .default_trigger = "audio-mute",
9291 },
9292 [LED_AUDIO_MICMUTE] = {
9293 .name = "platform::micmute",
9294 .max_brightness = 1,
9295 .brightness_set_blocking = tpacpi_led_micmute_set,
9296 .default_trigger = "audio-micmute",
9297 },
9298 };
9299
mute_led_init(struct ibm_init_struct * iibm)9300 static int mute_led_init(struct ibm_init_struct *iibm)
9301 {
9302 acpi_handle temp;
9303 int i, err;
9304
9305 for (i = 0; i < TPACPI_LED_MAX; i++) {
9306 struct tp_led_table *t = &led_tables[i];
9307 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9308 t->state = -ENODEV;
9309 continue;
9310 }
9311
9312 mute_led_cdev[i].brightness = ledtrig_audio_get(i);
9313 err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]);
9314 if (err < 0) {
9315 while (i--)
9316 led_classdev_unregister(&mute_led_cdev[i]);
9317 return err;
9318 }
9319 }
9320 return 0;
9321 }
9322
mute_led_exit(void)9323 static void mute_led_exit(void)
9324 {
9325 int i;
9326
9327 for (i = 0; i < TPACPI_LED_MAX; i++) {
9328 led_classdev_unregister(&mute_led_cdev[i]);
9329 tpacpi_led_set(i, false);
9330 }
9331 }
9332
mute_led_resume(void)9333 static void mute_led_resume(void)
9334 {
9335 int i;
9336
9337 for (i = 0; i < TPACPI_LED_MAX; i++) {
9338 struct tp_led_table *t = &led_tables[i];
9339 if (t->state >= 0)
9340 mute_led_on_off(t, t->state);
9341 }
9342 }
9343
9344 static struct ibm_struct mute_led_driver_data = {
9345 .name = "mute_led",
9346 .exit = mute_led_exit,
9347 .resume = mute_led_resume,
9348 };
9349
9350 /*
9351 * Battery Wear Control Driver
9352 * Contact: Ognjen Galic <smclt30p@gmail.com>
9353 */
9354
9355 /* Metadata */
9356
9357 #define GET_START "BCTG"
9358 #define SET_START "BCCS"
9359 #define GET_STOP "BCSG"
9360 #define SET_STOP "BCSS"
9361
9362 enum {
9363 BAT_ANY = 0,
9364 BAT_PRIMARY = 1,
9365 BAT_SECONDARY = 2
9366 };
9367
9368 enum {
9369 /* Error condition bit */
9370 METHOD_ERR = BIT(31),
9371 };
9372
9373 enum {
9374 /* This is used in the get/set helpers */
9375 THRESHOLD_START,
9376 THRESHOLD_STOP,
9377 };
9378
9379 struct tpacpi_battery_data {
9380 int charge_start;
9381 int start_support;
9382 int charge_stop;
9383 int stop_support;
9384 };
9385
9386 struct tpacpi_battery_driver_data {
9387 struct tpacpi_battery_data batteries[3];
9388 int individual_addressing;
9389 };
9390
9391 static struct tpacpi_battery_driver_data battery_info;
9392
9393 /* ACPI helpers/functions/probes */
9394
9395 /**
9396 * This evaluates a ACPI method call specific to the battery
9397 * ACPI extension. The specifics are that an error is marked
9398 * in the 32rd bit of the response, so we just check that here.
9399 */
tpacpi_battery_acpi_eval(char * method,int * ret,int param)9400 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param)
9401 {
9402 int response;
9403
9404 if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) {
9405 acpi_handle_err(hkey_handle, "%s: evaluate failed", method);
9406 return AE_ERROR;
9407 }
9408 if (response & METHOD_ERR) {
9409 acpi_handle_err(hkey_handle,
9410 "%s evaluated but flagged as error", method);
9411 return AE_ERROR;
9412 }
9413 *ret = response;
9414 return AE_OK;
9415 }
9416
tpacpi_battery_get(int what,int battery,int * ret)9417 static int tpacpi_battery_get(int what, int battery, int *ret)
9418 {
9419 switch (what) {
9420 case THRESHOLD_START:
9421 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery))
9422 return -ENODEV;
9423
9424 /* The value is in the low 8 bits of the response */
9425 *ret = *ret & 0xFF;
9426 return 0;
9427 case THRESHOLD_STOP:
9428 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery))
9429 return -ENODEV;
9430 /* Value is in lower 8 bits */
9431 *ret = *ret & 0xFF;
9432 /*
9433 * On the stop value, if we return 0 that
9434 * does not make any sense. 0 means Default, which
9435 * means that charging stops at 100%, so we return
9436 * that.
9437 */
9438 if (*ret == 0)
9439 *ret = 100;
9440 return 0;
9441 default:
9442 pr_crit("wrong parameter: %d", what);
9443 return -EINVAL;
9444 }
9445 }
9446
tpacpi_battery_set(int what,int battery,int value)9447 static int tpacpi_battery_set(int what, int battery, int value)
9448 {
9449 int param, ret;
9450 /* The first 8 bits are the value of the threshold */
9451 param = value;
9452 /* The battery ID is in bits 8-9, 2 bits */
9453 param |= battery << 8;
9454
9455 switch (what) {
9456 case THRESHOLD_START:
9457 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) {
9458 pr_err("failed to set charge threshold on battery %d",
9459 battery);
9460 return -ENODEV;
9461 }
9462 return 0;
9463 case THRESHOLD_STOP:
9464 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) {
9465 pr_err("failed to set stop threshold: %d", battery);
9466 return -ENODEV;
9467 }
9468 return 0;
9469 default:
9470 pr_crit("wrong parameter: %d", what);
9471 return -EINVAL;
9472 }
9473 }
9474
tpacpi_battery_probe(int battery)9475 static int tpacpi_battery_probe(int battery)
9476 {
9477 int ret = 0;
9478
9479 memset(&battery_info.batteries[battery], 0,
9480 sizeof(battery_info.batteries[battery]));
9481
9482 /*
9483 * 1) Get the current start threshold
9484 * 2) Check for support
9485 * 3) Get the current stop threshold
9486 * 4) Check for support
9487 */
9488 if (acpi_has_method(hkey_handle, GET_START)) {
9489 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) {
9490 pr_err("Error probing battery %d\n", battery);
9491 return -ENODEV;
9492 }
9493 /* Individual addressing is in bit 9 */
9494 if (ret & BIT(9))
9495 battery_info.individual_addressing = true;
9496 /* Support is marked in bit 8 */
9497 if (ret & BIT(8))
9498 battery_info.batteries[battery].start_support = 1;
9499 else
9500 return -ENODEV;
9501 if (tpacpi_battery_get(THRESHOLD_START, battery,
9502 &battery_info.batteries[battery].charge_start)) {
9503 pr_err("Error probing battery %d\n", battery);
9504 return -ENODEV;
9505 }
9506 }
9507 if (acpi_has_method(hkey_handle, GET_STOP)) {
9508 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) {
9509 pr_err("Error probing battery stop; %d\n", battery);
9510 return -ENODEV;
9511 }
9512 /* Support is marked in bit 8 */
9513 if (ret & BIT(8))
9514 battery_info.batteries[battery].stop_support = 1;
9515 else
9516 return -ENODEV;
9517 if (tpacpi_battery_get(THRESHOLD_STOP, battery,
9518 &battery_info.batteries[battery].charge_stop)) {
9519 pr_err("Error probing battery stop: %d\n", battery);
9520 return -ENODEV;
9521 }
9522 }
9523 pr_info("battery %d registered (start %d, stop %d)",
9524 battery,
9525 battery_info.batteries[battery].charge_start,
9526 battery_info.batteries[battery].charge_stop);
9527
9528 return 0;
9529 }
9530
9531 /* General helper functions */
9532
tpacpi_battery_get_id(const char * battery_name)9533 static int tpacpi_battery_get_id(const char *battery_name)
9534 {
9535
9536 if (strcmp(battery_name, "BAT0") == 0 ||
9537 tp_features.battery_force_primary)
9538 return BAT_PRIMARY;
9539 if (strcmp(battery_name, "BAT1") == 0)
9540 return BAT_SECONDARY;
9541 /*
9542 * If for some reason the battery is not BAT0 nor is it
9543 * BAT1, we will assume it's the default, first battery,
9544 * AKA primary.
9545 */
9546 pr_warn("unknown battery %s, assuming primary", battery_name);
9547 return BAT_PRIMARY;
9548 }
9549
9550 /* sysfs interface */
9551
tpacpi_battery_store(int what,struct device * dev,const char * buf,size_t count)9552 static ssize_t tpacpi_battery_store(int what,
9553 struct device *dev,
9554 const char *buf, size_t count)
9555 {
9556 struct power_supply *supply = to_power_supply(dev);
9557 unsigned long value;
9558 int battery, rval;
9559 /*
9560 * Some systems have support for more than
9561 * one battery. If that is the case,
9562 * tpacpi_battery_probe marked that addressing
9563 * them individually is supported, so we do that
9564 * based on the device struct.
9565 *
9566 * On systems that are not supported, we assume
9567 * the primary as most of the ACPI calls fail
9568 * with "Any Battery" as the parameter.
9569 */
9570 if (battery_info.individual_addressing)
9571 /* BAT_PRIMARY or BAT_SECONDARY */
9572 battery = tpacpi_battery_get_id(supply->desc->name);
9573 else
9574 battery = BAT_PRIMARY;
9575
9576 rval = kstrtoul(buf, 10, &value);
9577 if (rval)
9578 return rval;
9579
9580 switch (what) {
9581 case THRESHOLD_START:
9582 if (!battery_info.batteries[battery].start_support)
9583 return -ENODEV;
9584 /* valid values are [0, 99] */
9585 if (value > 99)
9586 return -EINVAL;
9587 if (value > battery_info.batteries[battery].charge_stop)
9588 return -EINVAL;
9589 if (tpacpi_battery_set(THRESHOLD_START, battery, value))
9590 return -ENODEV;
9591 battery_info.batteries[battery].charge_start = value;
9592 return count;
9593
9594 case THRESHOLD_STOP:
9595 if (!battery_info.batteries[battery].stop_support)
9596 return -ENODEV;
9597 /* valid values are [1, 100] */
9598 if (value < 1 || value > 100)
9599 return -EINVAL;
9600 if (value < battery_info.batteries[battery].charge_start)
9601 return -EINVAL;
9602 battery_info.batteries[battery].charge_stop = value;
9603 /*
9604 * When 100 is passed to stop, we need to flip
9605 * it to 0 as that the EC understands that as
9606 * "Default", which will charge to 100%
9607 */
9608 if (value == 100)
9609 value = 0;
9610 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value))
9611 return -EINVAL;
9612 return count;
9613 default:
9614 pr_crit("Wrong parameter: %d", what);
9615 return -EINVAL;
9616 }
9617 return count;
9618 }
9619
tpacpi_battery_show(int what,struct device * dev,char * buf)9620 static ssize_t tpacpi_battery_show(int what,
9621 struct device *dev,
9622 char *buf)
9623 {
9624 struct power_supply *supply = to_power_supply(dev);
9625 int ret, battery;
9626 /*
9627 * Some systems have support for more than
9628 * one battery. If that is the case,
9629 * tpacpi_battery_probe marked that addressing
9630 * them individually is supported, so we;
9631 * based on the device struct.
9632 *
9633 * On systems that are not supported, we assume
9634 * the primary as most of the ACPI calls fail
9635 * with "Any Battery" as the parameter.
9636 */
9637 if (battery_info.individual_addressing)
9638 /* BAT_PRIMARY or BAT_SECONDARY */
9639 battery = tpacpi_battery_get_id(supply->desc->name);
9640 else
9641 battery = BAT_PRIMARY;
9642 if (tpacpi_battery_get(what, battery, &ret))
9643 return -ENODEV;
9644 return sprintf(buf, "%d\n", ret);
9645 }
9646
charge_control_start_threshold_show(struct device * device,struct device_attribute * attr,char * buf)9647 static ssize_t charge_control_start_threshold_show(struct device *device,
9648 struct device_attribute *attr,
9649 char *buf)
9650 {
9651 return tpacpi_battery_show(THRESHOLD_START, device, buf);
9652 }
9653
charge_control_end_threshold_show(struct device * device,struct device_attribute * attr,char * buf)9654 static ssize_t charge_control_end_threshold_show(struct device *device,
9655 struct device_attribute *attr,
9656 char *buf)
9657 {
9658 return tpacpi_battery_show(THRESHOLD_STOP, device, buf);
9659 }
9660
charge_control_start_threshold_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)9661 static ssize_t charge_control_start_threshold_store(struct device *dev,
9662 struct device_attribute *attr,
9663 const char *buf, size_t count)
9664 {
9665 return tpacpi_battery_store(THRESHOLD_START, dev, buf, count);
9666 }
9667
charge_control_end_threshold_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)9668 static ssize_t charge_control_end_threshold_store(struct device *dev,
9669 struct device_attribute *attr,
9670 const char *buf, size_t count)
9671 {
9672 return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count);
9673 }
9674
9675 static DEVICE_ATTR_RW(charge_control_start_threshold);
9676 static DEVICE_ATTR_RW(charge_control_end_threshold);
9677 static struct device_attribute dev_attr_charge_start_threshold = __ATTR(
9678 charge_start_threshold,
9679 0644,
9680 charge_control_start_threshold_show,
9681 charge_control_start_threshold_store
9682 );
9683 static struct device_attribute dev_attr_charge_stop_threshold = __ATTR(
9684 charge_stop_threshold,
9685 0644,
9686 charge_control_end_threshold_show,
9687 charge_control_end_threshold_store
9688 );
9689
9690 static struct attribute *tpacpi_battery_attrs[] = {
9691 &dev_attr_charge_control_start_threshold.attr,
9692 &dev_attr_charge_control_end_threshold.attr,
9693 &dev_attr_charge_start_threshold.attr,
9694 &dev_attr_charge_stop_threshold.attr,
9695 NULL,
9696 };
9697
9698 ATTRIBUTE_GROUPS(tpacpi_battery);
9699
9700 /* ACPI battery hooking */
9701
tpacpi_battery_add(struct power_supply * battery)9702 static int tpacpi_battery_add(struct power_supply *battery)
9703 {
9704 int batteryid = tpacpi_battery_get_id(battery->desc->name);
9705
9706 if (tpacpi_battery_probe(batteryid))
9707 return -ENODEV;
9708 if (device_add_groups(&battery->dev, tpacpi_battery_groups))
9709 return -ENODEV;
9710 return 0;
9711 }
9712
tpacpi_battery_remove(struct power_supply * battery)9713 static int tpacpi_battery_remove(struct power_supply *battery)
9714 {
9715 device_remove_groups(&battery->dev, tpacpi_battery_groups);
9716 return 0;
9717 }
9718
9719 static struct acpi_battery_hook battery_hook = {
9720 .add_battery = tpacpi_battery_add,
9721 .remove_battery = tpacpi_battery_remove,
9722 .name = "ThinkPad Battery Extension",
9723 };
9724
9725 /* Subdriver init/exit */
9726
9727 static const struct tpacpi_quirk battery_quirk_table[] __initconst = {
9728 /*
9729 * Individual addressing is broken on models that expose the
9730 * primary battery as BAT1.
9731 */
9732 TPACPI_Q_LNV('J', '7', true), /* B5400 */
9733 TPACPI_Q_LNV('J', 'I', true), /* Thinkpad 11e */
9734 TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */
9735 TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */
9736 TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */
9737 TPACPI_Q_LNV3('R', '0', 'K', true), /* Thinkpad 11e gen 4 celeron BIOS */
9738 };
9739
tpacpi_battery_init(struct ibm_init_struct * ibm)9740 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm)
9741 {
9742 memset(&battery_info, 0, sizeof(battery_info));
9743
9744 tp_features.battery_force_primary = tpacpi_check_quirks(
9745 battery_quirk_table,
9746 ARRAY_SIZE(battery_quirk_table));
9747
9748 battery_hook_register(&battery_hook);
9749 return 0;
9750 }
9751
tpacpi_battery_exit(void)9752 static void tpacpi_battery_exit(void)
9753 {
9754 battery_hook_unregister(&battery_hook);
9755 }
9756
9757 static struct ibm_struct battery_driver_data = {
9758 .name = "battery",
9759 .exit = tpacpi_battery_exit,
9760 };
9761
9762 /*************************************************************************
9763 * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature
9764 */
9765
9766 static int lcdshadow_state;
9767
lcdshadow_on_off(bool state)9768 static int lcdshadow_on_off(bool state)
9769 {
9770 acpi_handle set_shadow_handle;
9771 int output;
9772
9773 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "SSSS", &set_shadow_handle))) {
9774 pr_warn("Thinkpad ACPI has no %s interface.\n", "SSSS");
9775 return -EIO;
9776 }
9777
9778 if (!acpi_evalf(set_shadow_handle, &output, NULL, "dd", (int)state))
9779 return -EIO;
9780
9781 lcdshadow_state = state;
9782 return 0;
9783 }
9784
lcdshadow_set(bool on)9785 static int lcdshadow_set(bool on)
9786 {
9787 if (lcdshadow_state < 0)
9788 return lcdshadow_state;
9789 if (lcdshadow_state == on)
9790 return 0;
9791 return lcdshadow_on_off(on);
9792 }
9793
tpacpi_lcdshadow_init(struct ibm_init_struct * iibm)9794 static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm)
9795 {
9796 acpi_handle get_shadow_handle;
9797 int output;
9798
9799 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GSSS", &get_shadow_handle))) {
9800 lcdshadow_state = -ENODEV;
9801 return 0;
9802 }
9803
9804 if (!acpi_evalf(get_shadow_handle, &output, NULL, "dd", 0)) {
9805 lcdshadow_state = -EIO;
9806 return -EIO;
9807 }
9808 if (!(output & 0x10000)) {
9809 lcdshadow_state = -ENODEV;
9810 return 0;
9811 }
9812 lcdshadow_state = output & 0x1;
9813
9814 return 0;
9815 }
9816
lcdshadow_resume(void)9817 static void lcdshadow_resume(void)
9818 {
9819 if (lcdshadow_state >= 0)
9820 lcdshadow_on_off(lcdshadow_state);
9821 }
9822
lcdshadow_read(struct seq_file * m)9823 static int lcdshadow_read(struct seq_file *m)
9824 {
9825 if (lcdshadow_state < 0) {
9826 seq_puts(m, "status:\t\tnot supported\n");
9827 } else {
9828 seq_printf(m, "status:\t\t%d\n", lcdshadow_state);
9829 seq_puts(m, "commands:\t0, 1\n");
9830 }
9831
9832 return 0;
9833 }
9834
lcdshadow_write(char * buf)9835 static int lcdshadow_write(char *buf)
9836 {
9837 char *cmd;
9838 int res, state = -EINVAL;
9839
9840 if (lcdshadow_state < 0)
9841 return -ENODEV;
9842
9843 while ((cmd = strsep(&buf, ","))) {
9844 res = kstrtoint(cmd, 10, &state);
9845 if (res < 0)
9846 return res;
9847 }
9848
9849 if (state >= 2 || state < 0)
9850 return -EINVAL;
9851
9852 return lcdshadow_set(state);
9853 }
9854
9855 static struct ibm_struct lcdshadow_driver_data = {
9856 .name = "lcdshadow",
9857 .resume = lcdshadow_resume,
9858 .read = lcdshadow_read,
9859 .write = lcdshadow_write,
9860 };
9861
9862 /*************************************************************************
9863 * DYTC subdriver, for the Lenovo lapmode feature
9864 */
9865
9866 #define DYTC_CMD_GET 2 /* To get current IC function and mode */
9867 #define DYTC_GET_LAPMODE_BIT 17 /* Set when in lapmode */
9868
9869 static bool dytc_lapmode;
9870
dytc_lapmode_notify_change(void)9871 static void dytc_lapmode_notify_change(void)
9872 {
9873 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "dytc_lapmode");
9874 }
9875
dytc_command(int command,int * output)9876 static int dytc_command(int command, int *output)
9877 {
9878 acpi_handle dytc_handle;
9879
9880 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "DYTC", &dytc_handle))) {
9881 /* Platform doesn't support DYTC */
9882 return -ENODEV;
9883 }
9884 if (!acpi_evalf(dytc_handle, output, NULL, "dd", command))
9885 return -EIO;
9886 return 0;
9887 }
9888
dytc_lapmode_get(bool * state)9889 static int dytc_lapmode_get(bool *state)
9890 {
9891 int output, err;
9892
9893 err = dytc_command(DYTC_CMD_GET, &output);
9894 if (err)
9895 return err;
9896 *state = output & BIT(DYTC_GET_LAPMODE_BIT) ? true : false;
9897 return 0;
9898 }
9899
dytc_lapmode_refresh(void)9900 static void dytc_lapmode_refresh(void)
9901 {
9902 bool new_state;
9903 int err;
9904
9905 err = dytc_lapmode_get(&new_state);
9906 if (err || (new_state == dytc_lapmode))
9907 return;
9908
9909 dytc_lapmode = new_state;
9910 dytc_lapmode_notify_change();
9911 }
9912
9913 /* sysfs lapmode entry */
dytc_lapmode_show(struct device * dev,struct device_attribute * attr,char * buf)9914 static ssize_t dytc_lapmode_show(struct device *dev,
9915 struct device_attribute *attr,
9916 char *buf)
9917 {
9918 return snprintf(buf, PAGE_SIZE, "%d\n", dytc_lapmode);
9919 }
9920
9921 static DEVICE_ATTR_RO(dytc_lapmode);
9922
9923 static struct attribute *dytc_attributes[] = {
9924 &dev_attr_dytc_lapmode.attr,
9925 NULL,
9926 };
9927
9928 static const struct attribute_group dytc_attr_group = {
9929 .attrs = dytc_attributes,
9930 };
9931
tpacpi_dytc_init(struct ibm_init_struct * iibm)9932 static int tpacpi_dytc_init(struct ibm_init_struct *iibm)
9933 {
9934 int err;
9935
9936 err = dytc_lapmode_get(&dytc_lapmode);
9937 /* If support isn't available (ENODEV) then don't return an error
9938 * but just don't create the sysfs group
9939 */
9940 if (err == -ENODEV)
9941 return 0;
9942 /* For all other errors we can flag the failure */
9943 if (err)
9944 return err;
9945
9946 /* Platform supports this feature - create the group */
9947 err = sysfs_create_group(&tpacpi_pdev->dev.kobj, &dytc_attr_group);
9948 return err;
9949 }
9950
dytc_exit(void)9951 static void dytc_exit(void)
9952 {
9953 sysfs_remove_group(&tpacpi_pdev->dev.kobj, &dytc_attr_group);
9954 }
9955
9956 static struct ibm_struct dytc_driver_data = {
9957 .name = "dytc",
9958 .exit = dytc_exit,
9959 };
9960
9961 /****************************************************************************
9962 ****************************************************************************
9963 *
9964 * Infrastructure
9965 *
9966 ****************************************************************************
9967 ****************************************************************************/
9968
9969 /*
9970 * HKEY event callout for other subdrivers go here
9971 * (yes, it is ugly, but it is quick, safe, and gets the job done
9972 */
tpacpi_driver_event(const unsigned int hkey_event)9973 static void tpacpi_driver_event(const unsigned int hkey_event)
9974 {
9975 if (ibm_backlight_device) {
9976 switch (hkey_event) {
9977 case TP_HKEY_EV_BRGHT_UP:
9978 case TP_HKEY_EV_BRGHT_DOWN:
9979 tpacpi_brightness_notify_change();
9980 }
9981 }
9982 if (alsa_card) {
9983 switch (hkey_event) {
9984 case TP_HKEY_EV_VOL_UP:
9985 case TP_HKEY_EV_VOL_DOWN:
9986 case TP_HKEY_EV_VOL_MUTE:
9987 volume_alsa_notify_change();
9988 }
9989 }
9990 if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) {
9991 enum led_brightness brightness;
9992
9993 mutex_lock(&kbdlight_mutex);
9994
9995 /*
9996 * Check the brightness actually changed, setting the brightness
9997 * through kbdlight_set_level() also triggers this event.
9998 */
9999 brightness = kbdlight_sysfs_get(NULL);
10000 if (kbdlight_brightness != brightness) {
10001 kbdlight_brightness = brightness;
10002 led_classdev_notify_brightness_hw_changed(
10003 &tpacpi_led_kbdlight.led_classdev, brightness);
10004 }
10005
10006 mutex_unlock(&kbdlight_mutex);
10007 }
10008
10009 if (hkey_event == TP_HKEY_EV_THM_CSM_COMPLETED)
10010 dytc_lapmode_refresh();
10011
10012 }
10013
hotkey_driver_event(const unsigned int scancode)10014 static void hotkey_driver_event(const unsigned int scancode)
10015 {
10016 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
10017 }
10018
10019 /* --------------------------------------------------------------------- */
10020
10021 /* /proc support */
10022 static struct proc_dir_entry *proc_dir;
10023
10024 /*
10025 * Module and infrastructure proble, init and exit handling
10026 */
10027
10028 static bool force_load;
10029
10030 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
str_supported(int is_supported)10031 static const char * __init str_supported(int is_supported)
10032 {
10033 static char text_unsupported[] __initdata = "not supported";
10034
10035 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0];
10036 }
10037 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
10038
ibm_exit(struct ibm_struct * ibm)10039 static void ibm_exit(struct ibm_struct *ibm)
10040 {
10041 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
10042
10043 list_del_init(&ibm->all_drivers);
10044
10045 if (ibm->flags.acpi_notify_installed) {
10046 dbg_printk(TPACPI_DBG_EXIT,
10047 "%s: acpi_remove_notify_handler\n", ibm->name);
10048 BUG_ON(!ibm->acpi);
10049 acpi_remove_notify_handler(*ibm->acpi->handle,
10050 ibm->acpi->type,
10051 dispatch_acpi_notify);
10052 ibm->flags.acpi_notify_installed = 0;
10053 }
10054
10055 if (ibm->flags.proc_created) {
10056 dbg_printk(TPACPI_DBG_EXIT,
10057 "%s: remove_proc_entry\n", ibm->name);
10058 remove_proc_entry(ibm->name, proc_dir);
10059 ibm->flags.proc_created = 0;
10060 }
10061
10062 if (ibm->flags.acpi_driver_registered) {
10063 dbg_printk(TPACPI_DBG_EXIT,
10064 "%s: acpi_bus_unregister_driver\n", ibm->name);
10065 BUG_ON(!ibm->acpi);
10066 acpi_bus_unregister_driver(ibm->acpi->driver);
10067 kfree(ibm->acpi->driver);
10068 ibm->acpi->driver = NULL;
10069 ibm->flags.acpi_driver_registered = 0;
10070 }
10071
10072 if (ibm->flags.init_called && ibm->exit) {
10073 ibm->exit();
10074 ibm->flags.init_called = 0;
10075 }
10076
10077 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
10078 }
10079
ibm_init(struct ibm_init_struct * iibm)10080 static int __init ibm_init(struct ibm_init_struct *iibm)
10081 {
10082 int ret;
10083 struct ibm_struct *ibm = iibm->data;
10084 struct proc_dir_entry *entry;
10085
10086 BUG_ON(ibm == NULL);
10087
10088 INIT_LIST_HEAD(&ibm->all_drivers);
10089
10090 if (ibm->flags.experimental && !experimental)
10091 return 0;
10092
10093 dbg_printk(TPACPI_DBG_INIT,
10094 "probing for %s\n", ibm->name);
10095
10096 if (iibm->init) {
10097 ret = iibm->init(iibm);
10098 if (ret > 0)
10099 return 0; /* probe failed */
10100 if (ret)
10101 return ret;
10102
10103 ibm->flags.init_called = 1;
10104 }
10105
10106 if (ibm->acpi) {
10107 if (ibm->acpi->hid) {
10108 ret = register_tpacpi_subdriver(ibm);
10109 if (ret)
10110 goto err_out;
10111 }
10112
10113 if (ibm->acpi->notify) {
10114 ret = setup_acpi_notify(ibm);
10115 if (ret == -ENODEV) {
10116 pr_notice("disabling subdriver %s\n",
10117 ibm->name);
10118 ret = 0;
10119 goto err_out;
10120 }
10121 if (ret < 0)
10122 goto err_out;
10123 }
10124 }
10125
10126 dbg_printk(TPACPI_DBG_INIT,
10127 "%s installed\n", ibm->name);
10128
10129 if (ibm->read) {
10130 umode_t mode = iibm->base_procfs_mode;
10131
10132 if (!mode)
10133 mode = S_IRUGO;
10134 if (ibm->write)
10135 mode |= S_IWUSR;
10136 entry = proc_create_data(ibm->name, mode, proc_dir,
10137 &dispatch_proc_ops, ibm);
10138 if (!entry) {
10139 pr_err("unable to create proc entry %s\n", ibm->name);
10140 ret = -ENODEV;
10141 goto err_out;
10142 }
10143 ibm->flags.proc_created = 1;
10144 }
10145
10146 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
10147
10148 return 0;
10149
10150 err_out:
10151 dbg_printk(TPACPI_DBG_INIT,
10152 "%s: at error exit path with result %d\n",
10153 ibm->name, ret);
10154
10155 ibm_exit(ibm);
10156 return (ret < 0) ? ret : 0;
10157 }
10158
10159 /* Probing */
10160
tpacpi_parse_fw_id(const char * const s,u32 * model,u16 * release)10161 static char __init tpacpi_parse_fw_id(const char * const s,
10162 u32 *model, u16 *release)
10163 {
10164 int i;
10165
10166 if (!s || strlen(s) < 8)
10167 goto invalid;
10168
10169 for (i = 0; i < 8; i++)
10170 if (!((s[i] >= '0' && s[i] <= '9') ||
10171 (s[i] >= 'A' && s[i] <= 'Z')))
10172 goto invalid;
10173
10174 /*
10175 * Most models: xxyTkkWW (#.##c)
10176 * Ancient 570/600 and -SL lacks (#.##c)
10177 */
10178 if (s[3] == 'T' || s[3] == 'N') {
10179 *model = TPID(s[0], s[1]);
10180 *release = TPVER(s[4], s[5]);
10181 return s[2];
10182
10183 /* New models: xxxyTkkW (#.##c); T550 and some others */
10184 } else if (s[4] == 'T' || s[4] == 'N') {
10185 *model = TPID3(s[0], s[1], s[2]);
10186 *release = TPVER(s[5], s[6]);
10187 return s[3];
10188 }
10189
10190 invalid:
10191 return '\0';
10192 }
10193
find_new_ec_fwstr(const struct dmi_header * dm,void * private)10194 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private)
10195 {
10196 char *ec_fw_string = (char *) private;
10197 const char *dmi_data = (const char *)dm;
10198 /*
10199 * ThinkPad Embedded Controller Program Table on newer models
10200 *
10201 * Offset | Name | Width | Description
10202 * ----------------------------------------------------
10203 * 0x00 | Type | BYTE | 0x8C
10204 * 0x01 | Length | BYTE |
10205 * 0x02 | Handle | WORD | Varies
10206 * 0x04 | Signature | BYTEx6 | ASCII for "LENOVO"
10207 * 0x0A | OEM struct offset | BYTE | 0x0B
10208 * 0x0B | OEM struct number | BYTE | 0x07, for this structure
10209 * 0x0C | OEM struct revision | BYTE | 0x01, for this format
10210 * 0x0D | ECP version ID | STR ID |
10211 * 0x0E | ECP release date | STR ID |
10212 */
10213
10214 /* Return if data structure not match */
10215 if (dm->type != 140 || dm->length < 0x0F ||
10216 memcmp(dmi_data + 4, "LENOVO", 6) != 0 ||
10217 dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 ||
10218 dmi_data[0x0C] != 0x01)
10219 return;
10220
10221 /* fwstr is the first 8byte string */
10222 strncpy(ec_fw_string, dmi_data + 0x0F, 8);
10223 }
10224
10225 /* returns 0 - probe ok, or < 0 - probe error.
10226 * Probe ok doesn't mean thinkpad found.
10227 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
get_thinkpad_model_data(struct thinkpad_id_data * tp)10228 static int __must_check __init get_thinkpad_model_data(
10229 struct thinkpad_id_data *tp)
10230 {
10231 const struct dmi_device *dev = NULL;
10232 char ec_fw_string[18] = {0};
10233 char const *s;
10234 char t;
10235
10236 if (!tp)
10237 return -EINVAL;
10238
10239 memset(tp, 0, sizeof(*tp));
10240
10241 if (dmi_name_in_vendors("IBM"))
10242 tp->vendor = PCI_VENDOR_ID_IBM;
10243 else if (dmi_name_in_vendors("LENOVO"))
10244 tp->vendor = PCI_VENDOR_ID_LENOVO;
10245 else
10246 return 0;
10247
10248 s = dmi_get_system_info(DMI_BIOS_VERSION);
10249 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
10250 if (s && !tp->bios_version_str)
10251 return -ENOMEM;
10252
10253 /* Really ancient ThinkPad 240X will fail this, which is fine */
10254 t = tpacpi_parse_fw_id(tp->bios_version_str,
10255 &tp->bios_model, &tp->bios_release);
10256 if (t != 'E' && t != 'C')
10257 return 0;
10258
10259 /*
10260 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
10261 * X32 or newer, all Z series; Some models must have an
10262 * up-to-date BIOS or they will not be detected.
10263 *
10264 * See https://thinkwiki.org/wiki/List_of_DMI_IDs
10265 */
10266 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
10267 if (sscanf(dev->name,
10268 "IBM ThinkPad Embedded Controller -[%17c",
10269 ec_fw_string) == 1) {
10270 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
10271 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
10272 break;
10273 }
10274 }
10275
10276 /* Newer ThinkPads have different EC program info table */
10277 if (!ec_fw_string[0])
10278 dmi_walk(find_new_ec_fwstr, &ec_fw_string);
10279
10280 if (ec_fw_string[0]) {
10281 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
10282 if (!tp->ec_version_str)
10283 return -ENOMEM;
10284
10285 t = tpacpi_parse_fw_id(ec_fw_string,
10286 &tp->ec_model, &tp->ec_release);
10287 if (t != 'H') {
10288 pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n",
10289 ec_fw_string);
10290 pr_notice("please report this to %s\n", TPACPI_MAIL);
10291 }
10292 }
10293
10294 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
10295 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) {
10296 tp->model_str = kstrdup(s, GFP_KERNEL);
10297 if (!tp->model_str)
10298 return -ENOMEM;
10299 } else {
10300 s = dmi_get_system_info(DMI_BIOS_VENDOR);
10301 if (s && !(strncasecmp(s, "Lenovo", 6))) {
10302 tp->model_str = kstrdup(s, GFP_KERNEL);
10303 if (!tp->model_str)
10304 return -ENOMEM;
10305 }
10306 }
10307
10308 s = dmi_get_system_info(DMI_PRODUCT_NAME);
10309 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
10310 if (s && !tp->nummodel_str)
10311 return -ENOMEM;
10312
10313 return 0;
10314 }
10315
probe_for_thinkpad(void)10316 static int __init probe_for_thinkpad(void)
10317 {
10318 int is_thinkpad;
10319
10320 if (acpi_disabled)
10321 return -ENODEV;
10322
10323 /* It would be dangerous to run the driver in this case */
10324 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
10325 return -ENODEV;
10326
10327 /*
10328 * Non-ancient models have better DMI tagging, but very old models
10329 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
10330 */
10331 is_thinkpad = (thinkpad_id.model_str != NULL) ||
10332 (thinkpad_id.ec_model != 0) ||
10333 tpacpi_is_fw_known();
10334
10335 /* The EC handler is required */
10336 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
10337 if (!ec_handle) {
10338 if (is_thinkpad)
10339 pr_err("Not yet supported ThinkPad detected!\n");
10340 return -ENODEV;
10341 }
10342
10343 if (!is_thinkpad && !force_load)
10344 return -ENODEV;
10345
10346 return 0;
10347 }
10348
thinkpad_acpi_init_banner(void)10349 static void __init thinkpad_acpi_init_banner(void)
10350 {
10351 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
10352 pr_info("%s\n", TPACPI_URL);
10353
10354 pr_info("ThinkPad BIOS %s, EC %s\n",
10355 (thinkpad_id.bios_version_str) ?
10356 thinkpad_id.bios_version_str : "unknown",
10357 (thinkpad_id.ec_version_str) ?
10358 thinkpad_id.ec_version_str : "unknown");
10359
10360 BUG_ON(!thinkpad_id.vendor);
10361
10362 if (thinkpad_id.model_str)
10363 pr_info("%s %s, model %s\n",
10364 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
10365 "IBM" : ((thinkpad_id.vendor ==
10366 PCI_VENDOR_ID_LENOVO) ?
10367 "Lenovo" : "Unknown vendor"),
10368 thinkpad_id.model_str,
10369 (thinkpad_id.nummodel_str) ?
10370 thinkpad_id.nummodel_str : "unknown");
10371 }
10372
10373 /* Module init, exit, parameters */
10374
10375 static struct ibm_init_struct ibms_init[] __initdata = {
10376 {
10377 .data = &thinkpad_acpi_driver_data,
10378 },
10379 {
10380 .init = hotkey_init,
10381 .data = &hotkey_driver_data,
10382 },
10383 {
10384 .init = bluetooth_init,
10385 .data = &bluetooth_driver_data,
10386 },
10387 {
10388 .init = wan_init,
10389 .data = &wan_driver_data,
10390 },
10391 {
10392 .init = uwb_init,
10393 .data = &uwb_driver_data,
10394 },
10395 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
10396 {
10397 .init = video_init,
10398 .base_procfs_mode = S_IRUSR,
10399 .data = &video_driver_data,
10400 },
10401 #endif
10402 {
10403 .init = kbdlight_init,
10404 .data = &kbdlight_driver_data,
10405 },
10406 {
10407 .init = light_init,
10408 .data = &light_driver_data,
10409 },
10410 {
10411 .init = cmos_init,
10412 .data = &cmos_driver_data,
10413 },
10414 {
10415 .init = led_init,
10416 .data = &led_driver_data,
10417 },
10418 {
10419 .init = beep_init,
10420 .data = &beep_driver_data,
10421 },
10422 {
10423 .init = thermal_init,
10424 .data = &thermal_driver_data,
10425 },
10426 {
10427 .init = brightness_init,
10428 .data = &brightness_driver_data,
10429 },
10430 {
10431 .init = volume_init,
10432 .data = &volume_driver_data,
10433 },
10434 {
10435 .init = fan_init,
10436 .data = &fan_driver_data,
10437 },
10438 {
10439 .init = mute_led_init,
10440 .data = &mute_led_driver_data,
10441 },
10442 {
10443 .init = tpacpi_battery_init,
10444 .data = &battery_driver_data,
10445 },
10446 {
10447 .init = tpacpi_lcdshadow_init,
10448 .data = &lcdshadow_driver_data,
10449 },
10450 {
10451 .init = tpacpi_dytc_init,
10452 .data = &dytc_driver_data,
10453 },
10454 };
10455
set_ibm_param(const char * val,const struct kernel_param * kp)10456 static int __init set_ibm_param(const char *val, const struct kernel_param *kp)
10457 {
10458 unsigned int i;
10459 struct ibm_struct *ibm;
10460
10461 if (!kp || !kp->name || !val)
10462 return -EINVAL;
10463
10464 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
10465 ibm = ibms_init[i].data;
10466 WARN_ON(ibm == NULL);
10467
10468 if (!ibm || !ibm->name)
10469 continue;
10470
10471 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
10472 if (strlen(val) > sizeof(ibms_init[i].param) - 1)
10473 return -ENOSPC;
10474 strcpy(ibms_init[i].param, val);
10475 return 0;
10476 }
10477 }
10478
10479 return -EINVAL;
10480 }
10481
10482 module_param(experimental, int, 0444);
10483 MODULE_PARM_DESC(experimental,
10484 "Enables experimental features when non-zero");
10485
10486 module_param_named(debug, dbg_level, uint, 0);
10487 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
10488
10489 module_param(force_load, bool, 0444);
10490 MODULE_PARM_DESC(force_load,
10491 "Attempts to load the driver even on a mis-identified ThinkPad when true");
10492
10493 module_param_named(fan_control, fan_control_allowed, bool, 0444);
10494 MODULE_PARM_DESC(fan_control,
10495 "Enables setting fan parameters features when true");
10496
10497 module_param_named(brightness_mode, brightness_mode, uint, 0444);
10498 MODULE_PARM_DESC(brightness_mode,
10499 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
10500
10501 module_param(brightness_enable, uint, 0444);
10502 MODULE_PARM_DESC(brightness_enable,
10503 "Enables backlight control when 1, disables when 0");
10504
10505 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
10506 module_param_named(volume_mode, volume_mode, uint, 0444);
10507 MODULE_PARM_DESC(volume_mode,
10508 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
10509
10510 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
10511 MODULE_PARM_DESC(volume_capabilities,
10512 "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only");
10513
10514 module_param_named(volume_control, volume_control_allowed, bool, 0444);
10515 MODULE_PARM_DESC(volume_control,
10516 "Enables software override for the console audio control when true");
10517
10518 module_param_named(software_mute, software_mute_requested, bool, 0444);
10519 MODULE_PARM_DESC(software_mute,
10520 "Request full software mute control");
10521
10522 /* ALSA module API parameters */
10523 module_param_named(index, alsa_index, int, 0444);
10524 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
10525 module_param_named(id, alsa_id, charp, 0444);
10526 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
10527 module_param_named(enable, alsa_enable, bool, 0444);
10528 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
10529 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
10530
10531 /* The module parameter can't be read back, that's why 0 is used here */
10532 #define TPACPI_PARAM(feature) \
10533 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
10534 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation")
10535
10536 TPACPI_PARAM(hotkey);
10537 TPACPI_PARAM(bluetooth);
10538 TPACPI_PARAM(video);
10539 TPACPI_PARAM(light);
10540 TPACPI_PARAM(cmos);
10541 TPACPI_PARAM(led);
10542 TPACPI_PARAM(beep);
10543 TPACPI_PARAM(brightness);
10544 TPACPI_PARAM(volume);
10545 TPACPI_PARAM(fan);
10546
10547 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
10548 module_param(dbg_wlswemul, uint, 0444);
10549 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
10550 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
10551 MODULE_PARM_DESC(wlsw_state,
10552 "Initial state of the emulated WLSW switch");
10553
10554 module_param(dbg_bluetoothemul, uint, 0444);
10555 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
10556 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
10557 MODULE_PARM_DESC(bluetooth_state,
10558 "Initial state of the emulated bluetooth switch");
10559
10560 module_param(dbg_wwanemul, uint, 0444);
10561 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
10562 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
10563 MODULE_PARM_DESC(wwan_state,
10564 "Initial state of the emulated WWAN switch");
10565
10566 module_param(dbg_uwbemul, uint, 0444);
10567 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
10568 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
10569 MODULE_PARM_DESC(uwb_state,
10570 "Initial state of the emulated UWB switch");
10571 #endif
10572
thinkpad_acpi_module_exit(void)10573 static void thinkpad_acpi_module_exit(void)
10574 {
10575 struct ibm_struct *ibm, *itmp;
10576
10577 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
10578
10579 list_for_each_entry_safe_reverse(ibm, itmp,
10580 &tpacpi_all_drivers,
10581 all_drivers) {
10582 ibm_exit(ibm);
10583 }
10584
10585 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
10586
10587 if (tpacpi_inputdev) {
10588 if (tp_features.input_device_registered)
10589 input_unregister_device(tpacpi_inputdev);
10590 else
10591 input_free_device(tpacpi_inputdev);
10592 kfree(hotkey_keycode_map);
10593 }
10594
10595 if (tpacpi_hwmon)
10596 hwmon_device_unregister(tpacpi_hwmon);
10597
10598 if (tpacpi_sensors_pdev)
10599 platform_device_unregister(tpacpi_sensors_pdev);
10600 if (tpacpi_pdev)
10601 platform_device_unregister(tpacpi_pdev);
10602
10603 if (tp_features.sensors_pdrv_attrs_registered)
10604 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
10605 if (tp_features.platform_drv_attrs_registered)
10606 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
10607
10608 if (tp_features.sensors_pdrv_registered)
10609 platform_driver_unregister(&tpacpi_hwmon_pdriver);
10610
10611 if (tp_features.platform_drv_registered)
10612 platform_driver_unregister(&tpacpi_pdriver);
10613
10614 if (proc_dir)
10615 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
10616
10617 if (tpacpi_wq)
10618 destroy_workqueue(tpacpi_wq);
10619
10620 kfree(thinkpad_id.bios_version_str);
10621 kfree(thinkpad_id.ec_version_str);
10622 kfree(thinkpad_id.model_str);
10623 kfree(thinkpad_id.nummodel_str);
10624 }
10625
10626
thinkpad_acpi_module_init(void)10627 static int __init thinkpad_acpi_module_init(void)
10628 {
10629 int ret, i;
10630
10631 tpacpi_lifecycle = TPACPI_LIFE_INIT;
10632
10633 /* Driver-level probe */
10634
10635 ret = get_thinkpad_model_data(&thinkpad_id);
10636 if (ret) {
10637 pr_err("unable to get DMI data: %d\n", ret);
10638 thinkpad_acpi_module_exit();
10639 return ret;
10640 }
10641 ret = probe_for_thinkpad();
10642 if (ret) {
10643 thinkpad_acpi_module_exit();
10644 return ret;
10645 }
10646
10647 /* Driver initialization */
10648
10649 thinkpad_acpi_init_banner();
10650 tpacpi_check_outdated_fw();
10651
10652 TPACPI_ACPIHANDLE_INIT(ecrd);
10653 TPACPI_ACPIHANDLE_INIT(ecwr);
10654
10655 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
10656 if (!tpacpi_wq) {
10657 thinkpad_acpi_module_exit();
10658 return -ENOMEM;
10659 }
10660
10661 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
10662 if (!proc_dir) {
10663 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
10664 thinkpad_acpi_module_exit();
10665 return -ENODEV;
10666 }
10667
10668 ret = platform_driver_register(&tpacpi_pdriver);
10669 if (ret) {
10670 pr_err("unable to register main platform driver\n");
10671 thinkpad_acpi_module_exit();
10672 return ret;
10673 }
10674 tp_features.platform_drv_registered = 1;
10675
10676 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
10677 if (ret) {
10678 pr_err("unable to register hwmon platform driver\n");
10679 thinkpad_acpi_module_exit();
10680 return ret;
10681 }
10682 tp_features.sensors_pdrv_registered = 1;
10683
10684 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
10685 if (!ret) {
10686 tp_features.platform_drv_attrs_registered = 1;
10687 ret = tpacpi_create_driver_attributes(
10688 &tpacpi_hwmon_pdriver.driver);
10689 }
10690 if (ret) {
10691 pr_err("unable to create sysfs driver attributes\n");
10692 thinkpad_acpi_module_exit();
10693 return ret;
10694 }
10695 tp_features.sensors_pdrv_attrs_registered = 1;
10696
10697
10698 /* Device initialization */
10699 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
10700 NULL, 0);
10701 if (IS_ERR(tpacpi_pdev)) {
10702 ret = PTR_ERR(tpacpi_pdev);
10703 tpacpi_pdev = NULL;
10704 pr_err("unable to register platform device\n");
10705 thinkpad_acpi_module_exit();
10706 return ret;
10707 }
10708 tpacpi_sensors_pdev = platform_device_register_simple(
10709 TPACPI_HWMON_DRVR_NAME,
10710 -1, NULL, 0);
10711 if (IS_ERR(tpacpi_sensors_pdev)) {
10712 ret = PTR_ERR(tpacpi_sensors_pdev);
10713 tpacpi_sensors_pdev = NULL;
10714 pr_err("unable to register hwmon platform device\n");
10715 thinkpad_acpi_module_exit();
10716 return ret;
10717 }
10718 tp_features.sensors_pdev_attrs_registered = 1;
10719 tpacpi_hwmon = hwmon_device_register_with_groups(
10720 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, NULL);
10721
10722 if (IS_ERR(tpacpi_hwmon)) {
10723 ret = PTR_ERR(tpacpi_hwmon);
10724 tpacpi_hwmon = NULL;
10725 pr_err("unable to register hwmon device\n");
10726 thinkpad_acpi_module_exit();
10727 return ret;
10728 }
10729 mutex_init(&tpacpi_inputdev_send_mutex);
10730 tpacpi_inputdev = input_allocate_device();
10731 if (!tpacpi_inputdev) {
10732 thinkpad_acpi_module_exit();
10733 return -ENOMEM;
10734 } else {
10735 /* Prepare input device, but don't register */
10736 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
10737 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
10738 tpacpi_inputdev->id.bustype = BUS_HOST;
10739 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
10740 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
10741 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
10742 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
10743 }
10744
10745 /* Init subdriver dependencies */
10746 tpacpi_detect_brightness_capabilities();
10747
10748 /* Init subdrivers */
10749 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
10750 ret = ibm_init(&ibms_init[i]);
10751 if (ret >= 0 && *ibms_init[i].param)
10752 ret = ibms_init[i].data->write(ibms_init[i].param);
10753 if (ret < 0) {
10754 thinkpad_acpi_module_exit();
10755 return ret;
10756 }
10757 }
10758
10759 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
10760
10761 ret = input_register_device(tpacpi_inputdev);
10762 if (ret < 0) {
10763 pr_err("unable to register input device\n");
10764 thinkpad_acpi_module_exit();
10765 return ret;
10766 } else {
10767 tp_features.input_device_registered = 1;
10768 }
10769
10770 return 0;
10771 }
10772
10773 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
10774
10775 /*
10776 * This will autoload the driver in almost every ThinkPad
10777 * in widespread use.
10778 *
10779 * Only _VERY_ old models, like the 240, 240x and 570 lack
10780 * the HKEY event interface.
10781 */
10782 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
10783
10784 /*
10785 * DMI matching for module autoloading
10786 *
10787 * See https://thinkwiki.org/wiki/List_of_DMI_IDs
10788 * See https://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
10789 *
10790 * Only models listed in thinkwiki will be supported, so add yours
10791 * if it is not there yet.
10792 */
10793 #define IBM_BIOS_MODULE_ALIAS(__type) \
10794 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
10795
10796 /* Ancient thinkpad BIOSes have to be identified by
10797 * BIOS type or model number, and there are far less
10798 * BIOS types than model numbers... */
10799 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
10800
10801 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
10802 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
10803 MODULE_DESCRIPTION(TPACPI_DESC);
10804 MODULE_VERSION(TPACPI_VERSION);
10805 MODULE_LICENSE("GPL");
10806
10807 module_init(thinkpad_acpi_module_init);
10808 module_exit(thinkpad_acpi_module_exit);
10809