1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
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 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25
26 #define TPACPI_VERSION "0.24"
27 #define TPACPI_SYSFS_VERSION 0x020700
28
29 /*
30 * Changelog:
31 * 2007-10-20 changelog trimmed down
32 *
33 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
34 * drivers/misc.
35 *
36 * 2006-11-22 0.13 new maintainer
37 * changelog now lives in git commit history, and will
38 * not be updated further in-file.
39 *
40 * 2005-03-17 0.11 support for 600e, 770x
41 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
42 *
43 * 2005-01-16 0.9 use MODULE_VERSION
44 * thanks to Henrik Brix Andersen <brix@gentoo.org>
45 * fix parameter passing on module loading
46 * thanks to Rusty Russell <rusty@rustcorp.com.au>
47 * thanks to Jim Radford <radford@blackbean.org>
48 * 2004-11-08 0.8 fix init error case, don't return from a macro
49 * thanks to Chris Wright <chrisw@osdl.org>
50 */
51
52 #include <linux/kernel.h>
53 #include <linux/module.h>
54 #include <linux/init.h>
55 #include <linux/types.h>
56 #include <linux/string.h>
57 #include <linux/list.h>
58 #include <linux/mutex.h>
59 #include <linux/sched.h>
60 #include <linux/kthread.h>
61 #include <linux/freezer.h>
62 #include <linux/delay.h>
63 #include <linux/slab.h>
64
65 #include <linux/nvram.h>
66 #include <linux/proc_fs.h>
67 #include <linux/seq_file.h>
68 #include <linux/sysfs.h>
69 #include <linux/backlight.h>
70 #include <linux/fb.h>
71 #include <linux/platform_device.h>
72 #include <linux/hwmon.h>
73 #include <linux/hwmon-sysfs.h>
74 #include <linux/input.h>
75 #include <linux/leds.h>
76 #include <linux/rfkill.h>
77 #include <asm/uaccess.h>
78
79 #include <linux/dmi.h>
80 #include <linux/jiffies.h>
81 #include <linux/workqueue.h>
82
83 #include <sound/core.h>
84 #include <sound/control.h>
85 #include <sound/initval.h>
86
87 #include <acpi/acpi_drivers.h>
88
89 #include <linux/pci_ids.h>
90
91
92 /* ThinkPad CMOS commands */
93 #define TP_CMOS_VOLUME_DOWN 0
94 #define TP_CMOS_VOLUME_UP 1
95 #define TP_CMOS_VOLUME_MUTE 2
96 #define TP_CMOS_BRIGHTNESS_UP 4
97 #define TP_CMOS_BRIGHTNESS_DOWN 5
98 #define TP_CMOS_THINKLIGHT_ON 12
99 #define TP_CMOS_THINKLIGHT_OFF 13
100
101 /* NVRAM Addresses */
102 enum tp_nvram_addr {
103 TP_NVRAM_ADDR_HK2 = 0x57,
104 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
105 TP_NVRAM_ADDR_VIDEO = 0x59,
106 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
107 TP_NVRAM_ADDR_MIXER = 0x60,
108 };
109
110 /* NVRAM bit masks */
111 enum {
112 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
113 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
114 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
115 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
116 TP_NVRAM_MASK_THINKLIGHT = 0x10,
117 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
118 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
119 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
120 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
121 TP_NVRAM_MASK_MUTE = 0x40,
122 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
123 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
124 TP_NVRAM_POS_LEVEL_VOLUME = 0,
125 };
126
127 /* Misc NVRAM-related */
128 enum {
129 TP_NVRAM_LEVEL_VOLUME_MAX = 14,
130 };
131
132 /* ACPI HIDs */
133 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068"
134 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068"
135 #define TPACPI_ACPI_EC_HID "PNP0C09"
136
137 /* Input IDs */
138 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
139 #define TPACPI_HKEY_INPUT_VERSION 0x4101
140
141 /* ACPI \WGSV commands */
142 enum {
143 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
144 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
145 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
146 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
147 };
148
149 /* TP_ACPI_WGSV_GET_STATE bits */
150 enum {
151 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
152 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
153 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
154 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
155 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
156 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
157 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
158 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
159 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
160 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
161 };
162
163 /* HKEY events */
164 enum tpacpi_hkey_event_t {
165 /* Hotkey-related */
166 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */
167 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */
168 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */
169 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */
170 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */
171 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */
172
173 /* Reasons for waking up from S3/S4 */
174 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */
175 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */
176 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */
177 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */
178 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */
179 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */
180
181 /* Auto-sleep after eject request */
182 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */
183 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */
184
185 /* Misc bay events */
186 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */
187 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock
188 or port replicator */
189 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug
190 dock or port replicator */
191
192 /* User-interface events */
193 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
194 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */
195 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */
196 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */
197 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */
198 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */
199 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */
200
201 /* Key-related user-interface events */
202 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */
203 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */
204
205 /* Thermal events */
206 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */
207 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */
208 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */
209 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */
210 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */
211
212 /* AC-related events */
213 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */
214
215 /* Misc */
216 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */
217 };
218
219 /****************************************************************************
220 * Main driver
221 */
222
223 #define TPACPI_NAME "thinkpad"
224 #define TPACPI_DESC "ThinkPad ACPI Extras"
225 #define TPACPI_FILE TPACPI_NAME "_acpi"
226 #define TPACPI_URL "http://ibm-acpi.sf.net/"
227 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
228
229 #define TPACPI_PROC_DIR "ibm"
230 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
231 #define TPACPI_DRVR_NAME TPACPI_FILE
232 #define TPACPI_DRVR_SHORTNAME "tpacpi"
233 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
234
235 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
236 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
237
238 #define TPACPI_MAX_ACPI_ARGS 3
239
240 /* Debugging printk groups */
241 #define TPACPI_DBG_ALL 0xffff
242 #define TPACPI_DBG_DISCLOSETASK 0x8000
243 #define TPACPI_DBG_INIT 0x0001
244 #define TPACPI_DBG_EXIT 0x0002
245 #define TPACPI_DBG_RFKILL 0x0004
246 #define TPACPI_DBG_HKEY 0x0008
247 #define TPACPI_DBG_FAN 0x0010
248 #define TPACPI_DBG_BRGHT 0x0020
249 #define TPACPI_DBG_MIXER 0x0040
250
251 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
252 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
253 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
254
255
256 /****************************************************************************
257 * Driver-wide structs and misc. variables
258 */
259
260 struct ibm_struct;
261
262 struct tp_acpi_drv_struct {
263 const struct acpi_device_id *hid;
264 struct acpi_driver *driver;
265
266 void (*notify) (struct ibm_struct *, u32);
267 acpi_handle *handle;
268 u32 type;
269 struct acpi_device *device;
270 };
271
272 struct ibm_struct {
273 char *name;
274
275 int (*read) (struct seq_file *);
276 int (*write) (char *);
277 void (*exit) (void);
278 void (*resume) (void);
279 void (*suspend) (void);
280 void (*shutdown) (void);
281
282 struct list_head all_drivers;
283
284 struct tp_acpi_drv_struct *acpi;
285
286 struct {
287 u8 acpi_driver_registered:1;
288 u8 acpi_notify_installed:1;
289 u8 proc_created:1;
290 u8 init_called:1;
291 u8 experimental:1;
292 } flags;
293 };
294
295 struct ibm_init_struct {
296 char param[32];
297
298 int (*init) (struct ibm_init_struct *);
299 umode_t base_procfs_mode;
300 struct ibm_struct *data;
301 };
302
303 static struct {
304 u32 bluetooth:1;
305 u32 hotkey:1;
306 u32 hotkey_mask:1;
307 u32 hotkey_wlsw:1;
308 u32 hotkey_tablet:1;
309 u32 light:1;
310 u32 light_status:1;
311 u32 bright_acpimode:1;
312 u32 bright_unkfw:1;
313 u32 wan:1;
314 u32 uwb:1;
315 u32 fan_ctrl_status_undef:1;
316 u32 second_fan:1;
317 u32 beep_needs_two_args:1;
318 u32 mixer_no_level_control:1;
319 u32 input_device_registered:1;
320 u32 platform_drv_registered:1;
321 u32 platform_drv_attrs_registered:1;
322 u32 sensors_pdrv_registered:1;
323 u32 sensors_pdrv_attrs_registered:1;
324 u32 sensors_pdev_attrs_registered:1;
325 u32 hotkey_poll_active:1;
326 } tp_features;
327
328 static struct {
329 u16 hotkey_mask_ff:1;
330 u16 volume_ctrl_forbidden:1;
331 } tp_warned;
332
333 struct thinkpad_id_data {
334 unsigned int vendor; /* ThinkPad vendor:
335 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
336
337 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
338 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
339
340 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
341 u16 ec_model;
342 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
343 u16 ec_release;
344
345 char *model_str; /* ThinkPad T43 */
346 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
347 };
348 static struct thinkpad_id_data thinkpad_id;
349
350 static enum {
351 TPACPI_LIFE_INIT = 0,
352 TPACPI_LIFE_RUNNING,
353 TPACPI_LIFE_EXITING,
354 } tpacpi_lifecycle;
355
356 static int experimental;
357 static u32 dbg_level;
358
359 static struct workqueue_struct *tpacpi_wq;
360
361 enum led_status_t {
362 TPACPI_LED_OFF = 0,
363 TPACPI_LED_ON,
364 TPACPI_LED_BLINK,
365 };
366
367 /* Special LED class that can defer work */
368 struct tpacpi_led_classdev {
369 struct led_classdev led_classdev;
370 struct work_struct work;
371 enum led_status_t new_state;
372 unsigned int led;
373 };
374
375 /* brightness level capabilities */
376 static unsigned int bright_maxlvl; /* 0 = unknown */
377
378 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
379 static int dbg_wlswemul;
380 static bool tpacpi_wlsw_emulstate;
381 static int dbg_bluetoothemul;
382 static bool tpacpi_bluetooth_emulstate;
383 static int dbg_wwanemul;
384 static bool tpacpi_wwan_emulstate;
385 static int dbg_uwbemul;
386 static bool tpacpi_uwb_emulstate;
387 #endif
388
389
390 /*************************************************************************
391 * Debugging helpers
392 */
393
394 #define dbg_printk(a_dbg_level, format, arg...) \
395 do { \
396 if (dbg_level & (a_dbg_level)) \
397 printk(KERN_DEBUG pr_fmt("%s: " format), \
398 __func__, ##arg); \
399 } while (0)
400
401 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
402 #define vdbg_printk dbg_printk
403 static const char *str_supported(int is_supported);
404 #else
str_supported(int is_supported)405 static inline const char *str_supported(int is_supported) { return ""; }
406 #define vdbg_printk(a_dbg_level, format, arg...) \
407 no_printk(format, ##arg)
408 #endif
409
tpacpi_log_usertask(const char * const what)410 static void tpacpi_log_usertask(const char * const what)
411 {
412 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
413 what, task_tgid_vnr(current));
414 }
415
416 #define tpacpi_disclose_usertask(what, format, arg...) \
417 do { \
418 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \
419 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
420 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \
421 what, task_tgid_vnr(current), ## arg); \
422 } \
423 } while (0)
424
425 /*
426 * Quirk handling helpers
427 *
428 * ThinkPad IDs and versions seen in the field so far
429 * are two-characters from the set [0-9A-Z], i.e. base 36.
430 *
431 * We use values well outside that range as specials.
432 */
433
434 #define TPACPI_MATCH_ANY 0xffffU
435 #define TPACPI_MATCH_UNKNOWN 0U
436
437 /* TPID('1', 'Y') == 0x5931 */
438 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
439
440 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
441 { .vendor = PCI_VENDOR_ID_IBM, \
442 .bios = TPID(__id1, __id2), \
443 .ec = TPACPI_MATCH_ANY, \
444 .quirks = (__quirk) }
445
446 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
447 { .vendor = PCI_VENDOR_ID_LENOVO, \
448 .bios = TPID(__id1, __id2), \
449 .ec = TPACPI_MATCH_ANY, \
450 .quirks = (__quirk) }
451
452 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \
453 { .vendor = PCI_VENDOR_ID_LENOVO, \
454 .bios = TPACPI_MATCH_ANY, \
455 .ec = TPID(__id1, __id2), \
456 .quirks = (__quirk) }
457
458 struct tpacpi_quirk {
459 unsigned int vendor;
460 u16 bios;
461 u16 ec;
462 unsigned long quirks;
463 };
464
465 /**
466 * tpacpi_check_quirks() - search BIOS/EC version on a list
467 * @qlist: array of &struct tpacpi_quirk
468 * @qlist_size: number of elements in @qlist
469 *
470 * Iterates over a quirks list until one is found that matches the
471 * ThinkPad's vendor, BIOS and EC model.
472 *
473 * Returns 0 if nothing matches, otherwise returns the quirks field of
474 * the matching &struct tpacpi_quirk entry.
475 *
476 * The match criteria is: vendor, ec and bios much match.
477 */
tpacpi_check_quirks(const struct tpacpi_quirk * qlist,unsigned int qlist_size)478 static unsigned long __init tpacpi_check_quirks(
479 const struct tpacpi_quirk *qlist,
480 unsigned int qlist_size)
481 {
482 while (qlist_size) {
483 if ((qlist->vendor == thinkpad_id.vendor ||
484 qlist->vendor == TPACPI_MATCH_ANY) &&
485 (qlist->bios == thinkpad_id.bios_model ||
486 qlist->bios == TPACPI_MATCH_ANY) &&
487 (qlist->ec == thinkpad_id.ec_model ||
488 qlist->ec == TPACPI_MATCH_ANY))
489 return qlist->quirks;
490
491 qlist_size--;
492 qlist++;
493 }
494 return 0;
495 }
496
tpacpi_is_lenovo(void)497 static inline bool __pure __init tpacpi_is_lenovo(void)
498 {
499 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
500 }
501
tpacpi_is_ibm(void)502 static inline bool __pure __init tpacpi_is_ibm(void)
503 {
504 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
505 }
506
507 /****************************************************************************
508 ****************************************************************************
509 *
510 * ACPI Helpers and device model
511 *
512 ****************************************************************************
513 ****************************************************************************/
514
515 /*************************************************************************
516 * ACPI basic handles
517 */
518
519 static acpi_handle root_handle;
520 static acpi_handle ec_handle;
521
522 #define TPACPI_HANDLE(object, parent, paths...) \
523 static acpi_handle object##_handle; \
524 static const acpi_handle * const object##_parent __initconst = \
525 &parent##_handle; \
526 static char *object##_paths[] __initdata = { paths }
527
528 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
529 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
530
531 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
532 /* T4x, X31, X40 */
533 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
534 "\\CMS", /* R40, R40e */
535 ); /* all others */
536
537 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
538 "^HKEY", /* R30, R31 */
539 "HKEY", /* all others */
540 ); /* 570 */
541
542 /*************************************************************************
543 * ACPI helpers
544 */
545
acpi_evalf(acpi_handle handle,int * res,char * method,char * fmt,...)546 static int acpi_evalf(acpi_handle handle,
547 int *res, char *method, char *fmt, ...)
548 {
549 char *fmt0 = fmt;
550 struct acpi_object_list params;
551 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
552 struct acpi_buffer result, *resultp;
553 union acpi_object out_obj;
554 acpi_status status;
555 va_list ap;
556 char res_type;
557 int success;
558 int quiet;
559
560 if (!*fmt) {
561 pr_err("acpi_evalf() called with empty format\n");
562 return 0;
563 }
564
565 if (*fmt == 'q') {
566 quiet = 1;
567 fmt++;
568 } else
569 quiet = 0;
570
571 res_type = *(fmt++);
572
573 params.count = 0;
574 params.pointer = &in_objs[0];
575
576 va_start(ap, fmt);
577 while (*fmt) {
578 char c = *(fmt++);
579 switch (c) {
580 case 'd': /* int */
581 in_objs[params.count].integer.value = va_arg(ap, int);
582 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
583 break;
584 /* add more types as needed */
585 default:
586 pr_err("acpi_evalf() called "
587 "with invalid format character '%c'\n", c);
588 va_end(ap);
589 return 0;
590 }
591 }
592 va_end(ap);
593
594 if (res_type != 'v') {
595 result.length = sizeof(out_obj);
596 result.pointer = &out_obj;
597 resultp = &result;
598 } else
599 resultp = NULL;
600
601 status = acpi_evaluate_object(handle, method, ¶ms, resultp);
602
603 switch (res_type) {
604 case 'd': /* int */
605 success = (status == AE_OK &&
606 out_obj.type == ACPI_TYPE_INTEGER);
607 if (success && res)
608 *res = out_obj.integer.value;
609 break;
610 case 'v': /* void */
611 success = status == AE_OK;
612 break;
613 /* add more types as needed */
614 default:
615 pr_err("acpi_evalf() called "
616 "with invalid format character '%c'\n", res_type);
617 return 0;
618 }
619
620 if (!success && !quiet)
621 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
622 method, fmt0, acpi_format_exception(status));
623
624 return success;
625 }
626
acpi_ec_read(int i,u8 * p)627 static int acpi_ec_read(int i, u8 *p)
628 {
629 int v;
630
631 if (ecrd_handle) {
632 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
633 return 0;
634 *p = v;
635 } else {
636 if (ec_read(i, p) < 0)
637 return 0;
638 }
639
640 return 1;
641 }
642
acpi_ec_write(int i,u8 v)643 static int acpi_ec_write(int i, u8 v)
644 {
645 if (ecwr_handle) {
646 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
647 return 0;
648 } else {
649 if (ec_write(i, v) < 0)
650 return 0;
651 }
652
653 return 1;
654 }
655
issue_thinkpad_cmos_command(int cmos_cmd)656 static int issue_thinkpad_cmos_command(int cmos_cmd)
657 {
658 if (!cmos_handle)
659 return -ENXIO;
660
661 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
662 return -EIO;
663
664 return 0;
665 }
666
667 /*************************************************************************
668 * ACPI device model
669 */
670
671 #define TPACPI_ACPIHANDLE_INIT(object) \
672 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
673 object##_paths, ARRAY_SIZE(object##_paths))
674
drv_acpi_handle_init(const char * name,acpi_handle * handle,const acpi_handle parent,char ** paths,const int num_paths)675 static void __init drv_acpi_handle_init(const char *name,
676 acpi_handle *handle, const acpi_handle parent,
677 char **paths, const int num_paths)
678 {
679 int i;
680 acpi_status status;
681
682 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
683 name);
684
685 for (i = 0; i < num_paths; i++) {
686 status = acpi_get_handle(parent, paths[i], handle);
687 if (ACPI_SUCCESS(status)) {
688 dbg_printk(TPACPI_DBG_INIT,
689 "Found ACPI handle %s for %s\n",
690 paths[i], name);
691 return;
692 }
693 }
694
695 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
696 name);
697 *handle = NULL;
698 }
699
tpacpi_acpi_handle_locate_callback(acpi_handle handle,u32 level,void * context,void ** return_value)700 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
701 u32 level, void *context, void **return_value)
702 {
703 *(acpi_handle *)return_value = handle;
704
705 return AE_CTRL_TERMINATE;
706 }
707
tpacpi_acpi_handle_locate(const char * name,const char * hid,acpi_handle * handle)708 static void __init tpacpi_acpi_handle_locate(const char *name,
709 const char *hid,
710 acpi_handle *handle)
711 {
712 acpi_status status;
713 acpi_handle device_found;
714
715 BUG_ON(!name || !hid || !handle);
716 vdbg_printk(TPACPI_DBG_INIT,
717 "trying to locate ACPI handle for %s, using HID %s\n",
718 name, hid);
719
720 memset(&device_found, 0, sizeof(device_found));
721 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
722 (void *)name, &device_found);
723
724 *handle = NULL;
725
726 if (ACPI_SUCCESS(status)) {
727 *handle = device_found;
728 dbg_printk(TPACPI_DBG_INIT,
729 "Found ACPI handle for %s\n", name);
730 } else {
731 vdbg_printk(TPACPI_DBG_INIT,
732 "Could not locate an ACPI handle for %s: %s\n",
733 name, acpi_format_exception(status));
734 }
735 }
736
dispatch_acpi_notify(acpi_handle handle,u32 event,void * data)737 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
738 {
739 struct ibm_struct *ibm = data;
740
741 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
742 return;
743
744 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
745 return;
746
747 ibm->acpi->notify(ibm, event);
748 }
749
setup_acpi_notify(struct ibm_struct * ibm)750 static int __init setup_acpi_notify(struct ibm_struct *ibm)
751 {
752 acpi_status status;
753 int rc;
754
755 BUG_ON(!ibm->acpi);
756
757 if (!*ibm->acpi->handle)
758 return 0;
759
760 vdbg_printk(TPACPI_DBG_INIT,
761 "setting up ACPI notify for %s\n", ibm->name);
762
763 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
764 if (rc < 0) {
765 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
766 return -ENODEV;
767 }
768
769 ibm->acpi->device->driver_data = ibm;
770 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
771 TPACPI_ACPI_EVENT_PREFIX,
772 ibm->name);
773
774 status = acpi_install_notify_handler(*ibm->acpi->handle,
775 ibm->acpi->type, dispatch_acpi_notify, ibm);
776 if (ACPI_FAILURE(status)) {
777 if (status == AE_ALREADY_EXISTS) {
778 pr_notice("another device driver is already "
779 "handling %s events\n", ibm->name);
780 } else {
781 pr_err("acpi_install_notify_handler(%s) failed: %s\n",
782 ibm->name, acpi_format_exception(status));
783 }
784 return -ENODEV;
785 }
786 ibm->flags.acpi_notify_installed = 1;
787 return 0;
788 }
789
tpacpi_device_add(struct acpi_device * device)790 static int __init tpacpi_device_add(struct acpi_device *device)
791 {
792 return 0;
793 }
794
register_tpacpi_subdriver(struct ibm_struct * ibm)795 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
796 {
797 int rc;
798
799 dbg_printk(TPACPI_DBG_INIT,
800 "registering %s as an ACPI driver\n", ibm->name);
801
802 BUG_ON(!ibm->acpi);
803
804 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
805 if (!ibm->acpi->driver) {
806 pr_err("failed to allocate memory for ibm->acpi->driver\n");
807 return -ENOMEM;
808 }
809
810 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
811 ibm->acpi->driver->ids = ibm->acpi->hid;
812
813 ibm->acpi->driver->ops.add = &tpacpi_device_add;
814
815 rc = acpi_bus_register_driver(ibm->acpi->driver);
816 if (rc < 0) {
817 pr_err("acpi_bus_register_driver(%s) failed: %d\n",
818 ibm->name, rc);
819 kfree(ibm->acpi->driver);
820 ibm->acpi->driver = NULL;
821 } else if (!rc)
822 ibm->flags.acpi_driver_registered = 1;
823
824 return rc;
825 }
826
827
828 /****************************************************************************
829 ****************************************************************************
830 *
831 * Procfs Helpers
832 *
833 ****************************************************************************
834 ****************************************************************************/
835
dispatch_proc_show(struct seq_file * m,void * v)836 static int dispatch_proc_show(struct seq_file *m, void *v)
837 {
838 struct ibm_struct *ibm = m->private;
839
840 if (!ibm || !ibm->read)
841 return -EINVAL;
842 return ibm->read(m);
843 }
844
dispatch_proc_open(struct inode * inode,struct file * file)845 static int dispatch_proc_open(struct inode *inode, struct file *file)
846 {
847 return single_open(file, dispatch_proc_show, PDE_DATA(inode));
848 }
849
dispatch_proc_write(struct file * file,const char __user * userbuf,size_t count,loff_t * pos)850 static ssize_t dispatch_proc_write(struct file *file,
851 const char __user *userbuf,
852 size_t count, loff_t *pos)
853 {
854 struct ibm_struct *ibm = PDE_DATA(file_inode(file));
855 char *kernbuf;
856 int ret;
857
858 if (!ibm || !ibm->write)
859 return -EINVAL;
860 if (count > PAGE_SIZE - 2)
861 return -EINVAL;
862
863 kernbuf = kmalloc(count + 2, GFP_KERNEL);
864 if (!kernbuf)
865 return -ENOMEM;
866
867 if (copy_from_user(kernbuf, userbuf, count)) {
868 kfree(kernbuf);
869 return -EFAULT;
870 }
871
872 kernbuf[count] = 0;
873 strcat(kernbuf, ",");
874 ret = ibm->write(kernbuf);
875 if (ret == 0)
876 ret = count;
877
878 kfree(kernbuf);
879
880 return ret;
881 }
882
883 static const struct file_operations dispatch_proc_fops = {
884 .owner = THIS_MODULE,
885 .open = dispatch_proc_open,
886 .read = seq_read,
887 .llseek = seq_lseek,
888 .release = single_release,
889 .write = dispatch_proc_write,
890 };
891
next_cmd(char ** cmds)892 static char *next_cmd(char **cmds)
893 {
894 char *start = *cmds;
895 char *end;
896
897 while ((end = strchr(start, ',')) && end == start)
898 start = end + 1;
899
900 if (!end)
901 return NULL;
902
903 *end = 0;
904 *cmds = end + 1;
905 return start;
906 }
907
908
909 /****************************************************************************
910 ****************************************************************************
911 *
912 * Device model: input, hwmon and platform
913 *
914 ****************************************************************************
915 ****************************************************************************/
916
917 static struct platform_device *tpacpi_pdev;
918 static struct platform_device *tpacpi_sensors_pdev;
919 static struct device *tpacpi_hwmon;
920 static struct input_dev *tpacpi_inputdev;
921 static struct mutex tpacpi_inputdev_send_mutex;
922 static LIST_HEAD(tpacpi_all_drivers);
923
924 #ifdef CONFIG_PM_SLEEP
tpacpi_suspend_handler(struct device * dev)925 static int tpacpi_suspend_handler(struct device *dev)
926 {
927 struct ibm_struct *ibm, *itmp;
928
929 list_for_each_entry_safe(ibm, itmp,
930 &tpacpi_all_drivers,
931 all_drivers) {
932 if (ibm->suspend)
933 (ibm->suspend)();
934 }
935
936 return 0;
937 }
938
tpacpi_resume_handler(struct device * dev)939 static int tpacpi_resume_handler(struct device *dev)
940 {
941 struct ibm_struct *ibm, *itmp;
942
943 list_for_each_entry_safe(ibm, itmp,
944 &tpacpi_all_drivers,
945 all_drivers) {
946 if (ibm->resume)
947 (ibm->resume)();
948 }
949
950 return 0;
951 }
952 #endif
953
954 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
955 tpacpi_suspend_handler, tpacpi_resume_handler);
956
tpacpi_shutdown_handler(struct platform_device * pdev)957 static void tpacpi_shutdown_handler(struct platform_device *pdev)
958 {
959 struct ibm_struct *ibm, *itmp;
960
961 list_for_each_entry_safe(ibm, itmp,
962 &tpacpi_all_drivers,
963 all_drivers) {
964 if (ibm->shutdown)
965 (ibm->shutdown)();
966 }
967 }
968
969 static struct platform_driver tpacpi_pdriver = {
970 .driver = {
971 .name = TPACPI_DRVR_NAME,
972 .owner = THIS_MODULE,
973 .pm = &tpacpi_pm,
974 },
975 .shutdown = tpacpi_shutdown_handler,
976 };
977
978 static struct platform_driver tpacpi_hwmon_pdriver = {
979 .driver = {
980 .name = TPACPI_HWMON_DRVR_NAME,
981 .owner = THIS_MODULE,
982 },
983 };
984
985 /*************************************************************************
986 * sysfs support helpers
987 */
988
989 struct attribute_set {
990 unsigned int members, max_members;
991 struct attribute_group group;
992 };
993
994 struct attribute_set_obj {
995 struct attribute_set s;
996 struct attribute *a;
997 } __attribute__((packed));
998
create_attr_set(unsigned int max_members,const char * name)999 static struct attribute_set *create_attr_set(unsigned int max_members,
1000 const char *name)
1001 {
1002 struct attribute_set_obj *sobj;
1003
1004 if (max_members == 0)
1005 return NULL;
1006
1007 /* Allocates space for implicit NULL at the end too */
1008 sobj = kzalloc(sizeof(struct attribute_set_obj) +
1009 max_members * sizeof(struct attribute *),
1010 GFP_KERNEL);
1011 if (!sobj)
1012 return NULL;
1013 sobj->s.max_members = max_members;
1014 sobj->s.group.attrs = &sobj->a;
1015 sobj->s.group.name = name;
1016
1017 return &sobj->s;
1018 }
1019
1020 #define destroy_attr_set(_set) \
1021 kfree(_set);
1022
1023 /* not multi-threaded safe, use it in a single thread per set */
add_to_attr_set(struct attribute_set * s,struct attribute * attr)1024 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1025 {
1026 if (!s || !attr)
1027 return -EINVAL;
1028
1029 if (s->members >= s->max_members)
1030 return -ENOMEM;
1031
1032 s->group.attrs[s->members] = attr;
1033 s->members++;
1034
1035 return 0;
1036 }
1037
add_many_to_attr_set(struct attribute_set * s,struct attribute ** attr,unsigned int count)1038 static int add_many_to_attr_set(struct attribute_set *s,
1039 struct attribute **attr,
1040 unsigned int count)
1041 {
1042 int i, res;
1043
1044 for (i = 0; i < count; i++) {
1045 res = add_to_attr_set(s, attr[i]);
1046 if (res)
1047 return res;
1048 }
1049
1050 return 0;
1051 }
1052
delete_attr_set(struct attribute_set * s,struct kobject * kobj)1053 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1054 {
1055 sysfs_remove_group(kobj, &s->group);
1056 destroy_attr_set(s);
1057 }
1058
1059 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1060 sysfs_create_group(_kobj, &_attr_set->group)
1061
parse_strtoul(const char * buf,unsigned long max,unsigned long * value)1062 static int parse_strtoul(const char *buf,
1063 unsigned long max, unsigned long *value)
1064 {
1065 char *endp;
1066
1067 *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1068 endp = skip_spaces(endp);
1069 if (*endp || *value > max)
1070 return -EINVAL;
1071
1072 return 0;
1073 }
1074
tpacpi_disable_brightness_delay(void)1075 static void tpacpi_disable_brightness_delay(void)
1076 {
1077 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1078 pr_notice("ACPI backlight control delay disabled\n");
1079 }
1080
printk_deprecated_attribute(const char * const what,const char * const details)1081 static void printk_deprecated_attribute(const char * const what,
1082 const char * const details)
1083 {
1084 tpacpi_log_usertask("deprecated sysfs attribute");
1085 pr_warn("WARNING: sysfs attribute %s is deprecated and "
1086 "will be removed. %s\n",
1087 what, details);
1088 }
1089
1090 /*************************************************************************
1091 * rfkill and radio control support helpers
1092 */
1093
1094 /*
1095 * ThinkPad-ACPI firmware handling model:
1096 *
1097 * WLSW (master wireless switch) is event-driven, and is common to all
1098 * firmware-controlled radios. It cannot be controlled, just monitored,
1099 * as expected. It overrides all radio state in firmware
1100 *
1101 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1102 * (TODO: verify how WLSW interacts with the returned radio state).
1103 *
1104 * The only time there are shadow radio state changes, is when
1105 * masked-off hotkeys are used.
1106 */
1107
1108 /*
1109 * Internal driver API for radio state:
1110 *
1111 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1112 * bool: true means radio blocked (off)
1113 */
1114 enum tpacpi_rfkill_state {
1115 TPACPI_RFK_RADIO_OFF = 0,
1116 TPACPI_RFK_RADIO_ON
1117 };
1118
1119 /* rfkill switches */
1120 enum tpacpi_rfk_id {
1121 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1122 TPACPI_RFK_WWAN_SW_ID,
1123 TPACPI_RFK_UWB_SW_ID,
1124 TPACPI_RFK_SW_MAX
1125 };
1126
1127 static const char *tpacpi_rfkill_names[] = {
1128 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1129 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1130 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1131 [TPACPI_RFK_SW_MAX] = NULL
1132 };
1133
1134 /* ThinkPad-ACPI rfkill subdriver */
1135 struct tpacpi_rfk {
1136 struct rfkill *rfkill;
1137 enum tpacpi_rfk_id id;
1138 const struct tpacpi_rfk_ops *ops;
1139 };
1140
1141 struct tpacpi_rfk_ops {
1142 /* firmware interface */
1143 int (*get_status)(void);
1144 int (*set_status)(const enum tpacpi_rfkill_state);
1145 };
1146
1147 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1148
1149 /* Query FW and update rfkill sw state for a given rfkill switch */
tpacpi_rfk_update_swstate(const struct tpacpi_rfk * tp_rfk)1150 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1151 {
1152 int status;
1153
1154 if (!tp_rfk)
1155 return -ENODEV;
1156
1157 status = (tp_rfk->ops->get_status)();
1158 if (status < 0)
1159 return status;
1160
1161 rfkill_set_sw_state(tp_rfk->rfkill,
1162 (status == TPACPI_RFK_RADIO_OFF));
1163
1164 return status;
1165 }
1166
1167 /* Query FW and update rfkill sw state for all rfkill switches */
tpacpi_rfk_update_swstate_all(void)1168 static void tpacpi_rfk_update_swstate_all(void)
1169 {
1170 unsigned int i;
1171
1172 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1173 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1174 }
1175
1176 /*
1177 * Sync the HW-blocking state of all rfkill switches,
1178 * do notice it causes the rfkill core to schedule uevents
1179 */
tpacpi_rfk_update_hwblock_state(bool blocked)1180 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1181 {
1182 unsigned int i;
1183 struct tpacpi_rfk *tp_rfk;
1184
1185 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1186 tp_rfk = tpacpi_rfkill_switches[i];
1187 if (tp_rfk) {
1188 if (rfkill_set_hw_state(tp_rfk->rfkill,
1189 blocked)) {
1190 /* ignore -- we track sw block */
1191 }
1192 }
1193 }
1194 }
1195
1196 /* Call to get the WLSW state from the firmware */
1197 static int hotkey_get_wlsw(void);
1198
1199 /* Call to query WLSW state and update all rfkill switches */
tpacpi_rfk_check_hwblock_state(void)1200 static bool tpacpi_rfk_check_hwblock_state(void)
1201 {
1202 int res = hotkey_get_wlsw();
1203 int hw_blocked;
1204
1205 /* When unknown or unsupported, we have to assume it is unblocked */
1206 if (res < 0)
1207 return false;
1208
1209 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1210 tpacpi_rfk_update_hwblock_state(hw_blocked);
1211
1212 return hw_blocked;
1213 }
1214
tpacpi_rfk_hook_set_block(void * data,bool blocked)1215 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1216 {
1217 struct tpacpi_rfk *tp_rfk = data;
1218 int res;
1219
1220 dbg_printk(TPACPI_DBG_RFKILL,
1221 "request to change radio state to %s\n",
1222 blocked ? "blocked" : "unblocked");
1223
1224 /* try to set radio state */
1225 res = (tp_rfk->ops->set_status)(blocked ?
1226 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1227
1228 /* and update the rfkill core with whatever the FW really did */
1229 tpacpi_rfk_update_swstate(tp_rfk);
1230
1231 return (res < 0) ? res : 0;
1232 }
1233
1234 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1235 .set_block = tpacpi_rfk_hook_set_block,
1236 };
1237
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)1238 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1239 const struct tpacpi_rfk_ops *tp_rfkops,
1240 const enum rfkill_type rfktype,
1241 const char *name,
1242 const bool set_default)
1243 {
1244 struct tpacpi_rfk *atp_rfk;
1245 int res;
1246 bool sw_state = false;
1247 bool hw_state;
1248 int sw_status;
1249
1250 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1251
1252 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1253 if (atp_rfk)
1254 atp_rfk->rfkill = rfkill_alloc(name,
1255 &tpacpi_pdev->dev,
1256 rfktype,
1257 &tpacpi_rfk_rfkill_ops,
1258 atp_rfk);
1259 if (!atp_rfk || !atp_rfk->rfkill) {
1260 pr_err("failed to allocate memory for rfkill class\n");
1261 kfree(atp_rfk);
1262 return -ENOMEM;
1263 }
1264
1265 atp_rfk->id = id;
1266 atp_rfk->ops = tp_rfkops;
1267
1268 sw_status = (tp_rfkops->get_status)();
1269 if (sw_status < 0) {
1270 pr_err("failed to read initial state for %s, error %d\n",
1271 name, sw_status);
1272 } else {
1273 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1274 if (set_default) {
1275 /* try to keep the initial state, since we ask the
1276 * firmware to preserve it across S5 in NVRAM */
1277 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1278 }
1279 }
1280 hw_state = tpacpi_rfk_check_hwblock_state();
1281 rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1282
1283 res = rfkill_register(atp_rfk->rfkill);
1284 if (res < 0) {
1285 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1286 rfkill_destroy(atp_rfk->rfkill);
1287 kfree(atp_rfk);
1288 return res;
1289 }
1290
1291 tpacpi_rfkill_switches[id] = atp_rfk;
1292
1293 pr_info("rfkill switch %s: radio is %sblocked\n",
1294 name, (sw_state || hw_state) ? "" : "un");
1295 return 0;
1296 }
1297
tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)1298 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1299 {
1300 struct tpacpi_rfk *tp_rfk;
1301
1302 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1303
1304 tp_rfk = tpacpi_rfkill_switches[id];
1305 if (tp_rfk) {
1306 rfkill_unregister(tp_rfk->rfkill);
1307 rfkill_destroy(tp_rfk->rfkill);
1308 tpacpi_rfkill_switches[id] = NULL;
1309 kfree(tp_rfk);
1310 }
1311 }
1312
printk_deprecated_rfkill_attribute(const char * const what)1313 static void printk_deprecated_rfkill_attribute(const char * const what)
1314 {
1315 printk_deprecated_attribute(what,
1316 "Please switch to generic rfkill before year 2010");
1317 }
1318
1319 /* sysfs <radio> enable ------------------------------------------------ */
tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,struct device_attribute * attr,char * buf)1320 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1321 struct device_attribute *attr,
1322 char *buf)
1323 {
1324 int status;
1325
1326 printk_deprecated_rfkill_attribute(attr->attr.name);
1327
1328 /* This is in the ABI... */
1329 if (tpacpi_rfk_check_hwblock_state()) {
1330 status = TPACPI_RFK_RADIO_OFF;
1331 } else {
1332 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1333 if (status < 0)
1334 return status;
1335 }
1336
1337 return snprintf(buf, PAGE_SIZE, "%d\n",
1338 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1339 }
1340
tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,struct device_attribute * attr,const char * buf,size_t count)1341 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1342 struct device_attribute *attr,
1343 const char *buf, size_t count)
1344 {
1345 unsigned long t;
1346 int res;
1347
1348 printk_deprecated_rfkill_attribute(attr->attr.name);
1349
1350 if (parse_strtoul(buf, 1, &t))
1351 return -EINVAL;
1352
1353 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1354
1355 /* This is in the ABI... */
1356 if (tpacpi_rfk_check_hwblock_state() && !!t)
1357 return -EPERM;
1358
1359 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1360 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1361 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1362
1363 return (res < 0) ? res : count;
1364 }
1365
1366 /* procfs -------------------------------------------------------------- */
tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id,struct seq_file * m)1367 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1368 {
1369 if (id >= TPACPI_RFK_SW_MAX)
1370 seq_printf(m, "status:\t\tnot supported\n");
1371 else {
1372 int status;
1373
1374 /* This is in the ABI... */
1375 if (tpacpi_rfk_check_hwblock_state()) {
1376 status = TPACPI_RFK_RADIO_OFF;
1377 } else {
1378 status = tpacpi_rfk_update_swstate(
1379 tpacpi_rfkill_switches[id]);
1380 if (status < 0)
1381 return status;
1382 }
1383
1384 seq_printf(m, "status:\t\t%s\n",
1385 (status == TPACPI_RFK_RADIO_ON) ?
1386 "enabled" : "disabled");
1387 seq_printf(m, "commands:\tenable, disable\n");
1388 }
1389
1390 return 0;
1391 }
1392
tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id,char * buf)1393 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1394 {
1395 char *cmd;
1396 int status = -1;
1397 int res = 0;
1398
1399 if (id >= TPACPI_RFK_SW_MAX)
1400 return -ENODEV;
1401
1402 while ((cmd = next_cmd(&buf))) {
1403 if (strlencmp(cmd, "enable") == 0)
1404 status = TPACPI_RFK_RADIO_ON;
1405 else if (strlencmp(cmd, "disable") == 0)
1406 status = TPACPI_RFK_RADIO_OFF;
1407 else
1408 return -EINVAL;
1409 }
1410
1411 if (status != -1) {
1412 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1413 (status == TPACPI_RFK_RADIO_ON) ?
1414 "enable" : "disable",
1415 tpacpi_rfkill_names[id]);
1416 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1417 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1418 }
1419
1420 return res;
1421 }
1422
1423 /*************************************************************************
1424 * thinkpad-acpi driver attributes
1425 */
1426
1427 /* interface_version --------------------------------------------------- */
tpacpi_driver_interface_version_show(struct device_driver * drv,char * buf)1428 static ssize_t tpacpi_driver_interface_version_show(
1429 struct device_driver *drv,
1430 char *buf)
1431 {
1432 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1433 }
1434
1435 static DRIVER_ATTR(interface_version, S_IRUGO,
1436 tpacpi_driver_interface_version_show, NULL);
1437
1438 /* debug_level --------------------------------------------------------- */
tpacpi_driver_debug_show(struct device_driver * drv,char * buf)1439 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1440 char *buf)
1441 {
1442 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1443 }
1444
tpacpi_driver_debug_store(struct device_driver * drv,const char * buf,size_t count)1445 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1446 const char *buf, size_t count)
1447 {
1448 unsigned long t;
1449
1450 if (parse_strtoul(buf, 0xffff, &t))
1451 return -EINVAL;
1452
1453 dbg_level = t;
1454
1455 return count;
1456 }
1457
1458 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1459 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1460
1461 /* version ------------------------------------------------------------- */
tpacpi_driver_version_show(struct device_driver * drv,char * buf)1462 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1463 char *buf)
1464 {
1465 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1466 TPACPI_DESC, TPACPI_VERSION);
1467 }
1468
1469 static DRIVER_ATTR(version, S_IRUGO,
1470 tpacpi_driver_version_show, NULL);
1471
1472 /* --------------------------------------------------------------------- */
1473
1474 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1475
1476 /* wlsw_emulstate ------------------------------------------------------ */
tpacpi_driver_wlsw_emulstate_show(struct device_driver * drv,char * buf)1477 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1478 char *buf)
1479 {
1480 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1481 }
1482
tpacpi_driver_wlsw_emulstate_store(struct device_driver * drv,const char * buf,size_t count)1483 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1484 const char *buf, size_t count)
1485 {
1486 unsigned long t;
1487
1488 if (parse_strtoul(buf, 1, &t))
1489 return -EINVAL;
1490
1491 if (tpacpi_wlsw_emulstate != !!t) {
1492 tpacpi_wlsw_emulstate = !!t;
1493 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1494 }
1495
1496 return count;
1497 }
1498
1499 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1500 tpacpi_driver_wlsw_emulstate_show,
1501 tpacpi_driver_wlsw_emulstate_store);
1502
1503 /* bluetooth_emulstate ------------------------------------------------- */
tpacpi_driver_bluetooth_emulstate_show(struct device_driver * drv,char * buf)1504 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1505 struct device_driver *drv,
1506 char *buf)
1507 {
1508 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1509 }
1510
tpacpi_driver_bluetooth_emulstate_store(struct device_driver * drv,const char * buf,size_t count)1511 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1512 struct device_driver *drv,
1513 const char *buf, size_t count)
1514 {
1515 unsigned long t;
1516
1517 if (parse_strtoul(buf, 1, &t))
1518 return -EINVAL;
1519
1520 tpacpi_bluetooth_emulstate = !!t;
1521
1522 return count;
1523 }
1524
1525 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1526 tpacpi_driver_bluetooth_emulstate_show,
1527 tpacpi_driver_bluetooth_emulstate_store);
1528
1529 /* wwan_emulstate ------------------------------------------------- */
tpacpi_driver_wwan_emulstate_show(struct device_driver * drv,char * buf)1530 static ssize_t tpacpi_driver_wwan_emulstate_show(
1531 struct device_driver *drv,
1532 char *buf)
1533 {
1534 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1535 }
1536
tpacpi_driver_wwan_emulstate_store(struct device_driver * drv,const char * buf,size_t count)1537 static ssize_t tpacpi_driver_wwan_emulstate_store(
1538 struct device_driver *drv,
1539 const char *buf, size_t count)
1540 {
1541 unsigned long t;
1542
1543 if (parse_strtoul(buf, 1, &t))
1544 return -EINVAL;
1545
1546 tpacpi_wwan_emulstate = !!t;
1547
1548 return count;
1549 }
1550
1551 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1552 tpacpi_driver_wwan_emulstate_show,
1553 tpacpi_driver_wwan_emulstate_store);
1554
1555 /* uwb_emulstate ------------------------------------------------- */
tpacpi_driver_uwb_emulstate_show(struct device_driver * drv,char * buf)1556 static ssize_t tpacpi_driver_uwb_emulstate_show(
1557 struct device_driver *drv,
1558 char *buf)
1559 {
1560 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1561 }
1562
tpacpi_driver_uwb_emulstate_store(struct device_driver * drv,const char * buf,size_t count)1563 static ssize_t tpacpi_driver_uwb_emulstate_store(
1564 struct device_driver *drv,
1565 const char *buf, size_t count)
1566 {
1567 unsigned long t;
1568
1569 if (parse_strtoul(buf, 1, &t))
1570 return -EINVAL;
1571
1572 tpacpi_uwb_emulstate = !!t;
1573
1574 return count;
1575 }
1576
1577 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1578 tpacpi_driver_uwb_emulstate_show,
1579 tpacpi_driver_uwb_emulstate_store);
1580 #endif
1581
1582 /* --------------------------------------------------------------------- */
1583
1584 static struct driver_attribute *tpacpi_driver_attributes[] = {
1585 &driver_attr_debug_level, &driver_attr_version,
1586 &driver_attr_interface_version,
1587 };
1588
tpacpi_create_driver_attributes(struct device_driver * drv)1589 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1590 {
1591 int i, res;
1592
1593 i = 0;
1594 res = 0;
1595 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1596 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1597 i++;
1598 }
1599
1600 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1601 if (!res && dbg_wlswemul)
1602 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1603 if (!res && dbg_bluetoothemul)
1604 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1605 if (!res && dbg_wwanemul)
1606 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1607 if (!res && dbg_uwbemul)
1608 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1609 #endif
1610
1611 return res;
1612 }
1613
tpacpi_remove_driver_attributes(struct device_driver * drv)1614 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1615 {
1616 int i;
1617
1618 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1619 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1620
1621 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1622 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1623 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1624 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1625 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1626 #endif
1627 }
1628
1629 /*************************************************************************
1630 * Firmware Data
1631 */
1632
1633 /*
1634 * Table of recommended minimum BIOS versions
1635 *
1636 * Reasons for listing:
1637 * 1. Stable BIOS, listed because the unknown amount of
1638 * bugs and bad ACPI behaviour on older versions
1639 *
1640 * 2. BIOS or EC fw with known bugs that trigger on Linux
1641 *
1642 * 3. BIOS with known reduced functionality in older versions
1643 *
1644 * We recommend the latest BIOS and EC version.
1645 * We only support the latest BIOS and EC fw version as a rule.
1646 *
1647 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1648 * Information from users in ThinkWiki
1649 *
1650 * WARNING: we use this table also to detect that the machine is
1651 * a ThinkPad in some cases, so don't remove entries lightly.
1652 */
1653
1654 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1655 { .vendor = (__v), \
1656 .bios = TPID(__id1, __id2), \
1657 .ec = TPACPI_MATCH_ANY, \
1658 .quirks = TPACPI_MATCH_ANY << 16 \
1659 | (__bv1) << 8 | (__bv2) }
1660
1661 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1662 __eid, __ev1, __ev2) \
1663 { .vendor = (__v), \
1664 .bios = TPID(__bid1, __bid2), \
1665 .ec = __eid, \
1666 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1667 | (__bv1) << 8 | (__bv2) }
1668
1669 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1670 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1671
1672 /* Outdated IBM BIOSes often lack the EC id string */
1673 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1674 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1675 __bv1, __bv2, TPID(__id1, __id2), \
1676 __ev1, __ev2), \
1677 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1678 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1679 __ev1, __ev2)
1680
1681 /* Outdated IBM BIOSes often lack the EC id string */
1682 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1683 __eid1, __eid2, __ev1, __ev2) \
1684 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1685 __bv1, __bv2, TPID(__eid1, __eid2), \
1686 __ev1, __ev2), \
1687 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1688 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1689 __ev1, __ev2)
1690
1691 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1692 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1693
1694 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1695 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1696 __bv1, __bv2, TPID(__id1, __id2), \
1697 __ev1, __ev2)
1698
1699 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1700 __eid1, __eid2, __ev1, __ev2) \
1701 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1702 __bv1, __bv2, TPID(__eid1, __eid2), \
1703 __ev1, __ev2)
1704
1705 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1706 /* Numeric models ------------------ */
1707 /* FW MODEL BIOS VERS */
1708 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1709 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1710 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1711 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1712 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1713 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1714 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1715 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1716 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1717
1718 /* A-series ------------------------- */
1719 /* FW MODEL BIOS VERS EC VERS */
1720 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1721 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1722 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1723 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1724 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1725 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1726 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1727 TPV_QI0('1', '3', '2', '0'), /* A22m */
1728 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1729 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1730 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1731
1732 /* G-series ------------------------- */
1733 /* FW MODEL BIOS VERS */
1734 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1735 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1736
1737 /* R-series, T-series --------------- */
1738 /* FW MODEL BIOS VERS EC VERS */
1739 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1740 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1741 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1742 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1743 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1744 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1745 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1746 T40/p, T41/p, T42/p (1) */
1747 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1748 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1749 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1750 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1751
1752 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1753 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1754 TPV_QI0('1', '6', '3', '2'), /* T22 */
1755 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1756 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1757 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1758
1759 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1760 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1761 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
1762
1763 /* BIOS FW BIOS VERS EC FW EC VERS */
1764 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1765 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1766
1767 /* X-series ------------------------- */
1768 /* FW MODEL BIOS VERS EC VERS */
1769 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1770 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1771 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1772 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1773 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1774 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1775 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1776
1777 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
1778 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
1779
1780 /* (0) - older versions lack DMI EC fw string and functionality */
1781 /* (1) - older versions known to lack functionality */
1782 };
1783
1784 #undef TPV_QL1
1785 #undef TPV_QL0
1786 #undef TPV_QI2
1787 #undef TPV_QI1
1788 #undef TPV_QI0
1789 #undef TPV_Q_X
1790 #undef TPV_Q
1791
tpacpi_check_outdated_fw(void)1792 static void __init tpacpi_check_outdated_fw(void)
1793 {
1794 unsigned long fwvers;
1795 u16 ec_version, bios_version;
1796
1797 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1798 ARRAY_SIZE(tpacpi_bios_version_qtable));
1799
1800 if (!fwvers)
1801 return;
1802
1803 bios_version = fwvers & 0xffffU;
1804 ec_version = (fwvers >> 16) & 0xffffU;
1805
1806 /* note that unknown versions are set to 0x0000 and we use that */
1807 if ((bios_version > thinkpad_id.bios_release) ||
1808 (ec_version > thinkpad_id.ec_release &&
1809 ec_version != TPACPI_MATCH_ANY)) {
1810 /*
1811 * The changelogs would let us track down the exact
1812 * reason, but it is just too much of a pain to track
1813 * it. We only list BIOSes that are either really
1814 * broken, or really stable to begin with, so it is
1815 * best if the user upgrades the firmware anyway.
1816 */
1817 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1818 pr_warn("WARNING: This firmware may be missing critical bug "
1819 "fixes and/or important features\n");
1820 }
1821 }
1822
tpacpi_is_fw_known(void)1823 static bool __init tpacpi_is_fw_known(void)
1824 {
1825 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1826 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1827 }
1828
1829 /****************************************************************************
1830 ****************************************************************************
1831 *
1832 * Subdrivers
1833 *
1834 ****************************************************************************
1835 ****************************************************************************/
1836
1837 /*************************************************************************
1838 * thinkpad-acpi metadata subdriver
1839 */
1840
thinkpad_acpi_driver_read(struct seq_file * m)1841 static int thinkpad_acpi_driver_read(struct seq_file *m)
1842 {
1843 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1844 seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1845 return 0;
1846 }
1847
1848 static struct ibm_struct thinkpad_acpi_driver_data = {
1849 .name = "driver",
1850 .read = thinkpad_acpi_driver_read,
1851 };
1852
1853 /*************************************************************************
1854 * Hotkey subdriver
1855 */
1856
1857 /*
1858 * ThinkPad firmware event model
1859 *
1860 * The ThinkPad firmware has two main event interfaces: normal ACPI
1861 * notifications (which follow the ACPI standard), and a private event
1862 * interface.
1863 *
1864 * The private event interface also issues events for the hotkeys. As
1865 * the driver gained features, the event handling code ended up being
1866 * built around the hotkey subdriver. This will need to be refactored
1867 * to a more formal event API eventually.
1868 *
1869 * Some "hotkeys" are actually supposed to be used as event reports,
1870 * such as "brightness has changed", "volume has changed", depending on
1871 * the ThinkPad model and how the firmware is operating.
1872 *
1873 * Unlike other classes, hotkey-class events have mask/unmask control on
1874 * non-ancient firmware. However, how it behaves changes a lot with the
1875 * firmware model and version.
1876 */
1877
1878 enum { /* hot key scan codes (derived from ACPI DSDT) */
1879 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1880 TP_ACPI_HOTKEYSCAN_FNF2,
1881 TP_ACPI_HOTKEYSCAN_FNF3,
1882 TP_ACPI_HOTKEYSCAN_FNF4,
1883 TP_ACPI_HOTKEYSCAN_FNF5,
1884 TP_ACPI_HOTKEYSCAN_FNF6,
1885 TP_ACPI_HOTKEYSCAN_FNF7,
1886 TP_ACPI_HOTKEYSCAN_FNF8,
1887 TP_ACPI_HOTKEYSCAN_FNF9,
1888 TP_ACPI_HOTKEYSCAN_FNF10,
1889 TP_ACPI_HOTKEYSCAN_FNF11,
1890 TP_ACPI_HOTKEYSCAN_FNF12,
1891 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1892 TP_ACPI_HOTKEYSCAN_FNINSERT,
1893 TP_ACPI_HOTKEYSCAN_FNDELETE,
1894 TP_ACPI_HOTKEYSCAN_FNHOME,
1895 TP_ACPI_HOTKEYSCAN_FNEND,
1896 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1897 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1898 TP_ACPI_HOTKEYSCAN_FNSPACE,
1899 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1900 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1901 TP_ACPI_HOTKEYSCAN_MUTE,
1902 TP_ACPI_HOTKEYSCAN_THINKPAD,
1903 TP_ACPI_HOTKEYSCAN_UNK1,
1904 TP_ACPI_HOTKEYSCAN_UNK2,
1905 TP_ACPI_HOTKEYSCAN_UNK3,
1906 TP_ACPI_HOTKEYSCAN_UNK4,
1907 TP_ACPI_HOTKEYSCAN_UNK5,
1908 TP_ACPI_HOTKEYSCAN_UNK6,
1909 TP_ACPI_HOTKEYSCAN_UNK7,
1910 TP_ACPI_HOTKEYSCAN_UNK8,
1911
1912 /* Hotkey keymap size */
1913 TPACPI_HOTKEY_MAP_LEN
1914 };
1915
1916 enum { /* Keys/events available through NVRAM polling */
1917 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1918 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1919 };
1920
1921 enum { /* Positions of some of the keys in hotkey masks */
1922 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1923 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1924 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1925 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1926 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1927 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1928 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1929 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1930 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1931 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1932 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1933 };
1934
1935 enum { /* NVRAM to ACPI HKEY group map */
1936 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1937 TP_ACPI_HKEY_ZOOM_MASK |
1938 TP_ACPI_HKEY_DISPSWTCH_MASK |
1939 TP_ACPI_HKEY_HIBERNATE_MASK,
1940 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1941 TP_ACPI_HKEY_BRGHTDWN_MASK,
1942 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1943 TP_ACPI_HKEY_VOLDWN_MASK |
1944 TP_ACPI_HKEY_MUTE_MASK,
1945 };
1946
1947 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1948 struct tp_nvram_state {
1949 u16 thinkpad_toggle:1;
1950 u16 zoom_toggle:1;
1951 u16 display_toggle:1;
1952 u16 thinklight_toggle:1;
1953 u16 hibernate_toggle:1;
1954 u16 displayexp_toggle:1;
1955 u16 display_state:1;
1956 u16 brightness_toggle:1;
1957 u16 volume_toggle:1;
1958 u16 mute:1;
1959
1960 u8 brightness_level;
1961 u8 volume_level;
1962 };
1963
1964 /* kthread for the hotkey poller */
1965 static struct task_struct *tpacpi_hotkey_task;
1966
1967 /*
1968 * Acquire mutex to write poller control variables as an
1969 * atomic block.
1970 *
1971 * Increment hotkey_config_change when changing them if you
1972 * want the kthread to forget old state.
1973 *
1974 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1975 */
1976 static struct mutex hotkey_thread_data_mutex;
1977 static unsigned int hotkey_config_change;
1978
1979 /*
1980 * hotkey poller control variables
1981 *
1982 * Must be atomic or readers will also need to acquire mutex
1983 *
1984 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1985 * should be used only when the changes need to be taken as
1986 * a block, OR when one needs to force the kthread to forget
1987 * old state.
1988 */
1989 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1990 static unsigned int hotkey_poll_freq = 10; /* Hz */
1991
1992 #define HOTKEY_CONFIG_CRITICAL_START \
1993 do { \
1994 mutex_lock(&hotkey_thread_data_mutex); \
1995 hotkey_config_change++; \
1996 } while (0);
1997 #define HOTKEY_CONFIG_CRITICAL_END \
1998 mutex_unlock(&hotkey_thread_data_mutex);
1999
2000 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2001
2002 #define hotkey_source_mask 0U
2003 #define HOTKEY_CONFIG_CRITICAL_START
2004 #define HOTKEY_CONFIG_CRITICAL_END
2005
2006 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2007
2008 static struct mutex hotkey_mutex;
2009
2010 static enum { /* Reasons for waking up */
2011 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
2012 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
2013 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
2014 } hotkey_wakeup_reason;
2015
2016 static int hotkey_autosleep_ack;
2017
2018 static u32 hotkey_orig_mask; /* events the BIOS had enabled */
2019 static u32 hotkey_all_mask; /* all events supported in fw */
2020 static u32 hotkey_reserved_mask; /* events better left disabled */
2021 static u32 hotkey_driver_mask; /* events needed by the driver */
2022 static u32 hotkey_user_mask; /* events visible to userspace */
2023 static u32 hotkey_acpi_mask; /* events enabled in firmware */
2024
2025 static unsigned int hotkey_report_mode;
2026
2027 static u16 *hotkey_keycode_map;
2028
2029 static struct attribute_set *hotkey_dev_attributes;
2030
2031 static void tpacpi_driver_event(const unsigned int hkey_event);
2032 static void hotkey_driver_event(const unsigned int scancode);
2033 static void hotkey_poll_setup(const bool may_warn);
2034
2035 /* HKEY.MHKG() return bits */
2036 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2037
hotkey_get_wlsw(void)2038 static int hotkey_get_wlsw(void)
2039 {
2040 int status;
2041
2042 if (!tp_features.hotkey_wlsw)
2043 return -ENODEV;
2044
2045 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2046 if (dbg_wlswemul)
2047 return (tpacpi_wlsw_emulstate) ?
2048 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2049 #endif
2050
2051 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2052 return -EIO;
2053
2054 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2055 }
2056
hotkey_get_tablet_mode(int * status)2057 static int hotkey_get_tablet_mode(int *status)
2058 {
2059 int s;
2060
2061 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2062 return -EIO;
2063
2064 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2065 return 0;
2066 }
2067
2068 /*
2069 * Reads current event mask from firmware, and updates
2070 * hotkey_acpi_mask accordingly. Also resets any bits
2071 * from hotkey_user_mask that are unavailable to be
2072 * delivered (shadow requirement of the userspace ABI).
2073 *
2074 * Call with hotkey_mutex held
2075 */
hotkey_mask_get(void)2076 static int hotkey_mask_get(void)
2077 {
2078 if (tp_features.hotkey_mask) {
2079 u32 m = 0;
2080
2081 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2082 return -EIO;
2083
2084 hotkey_acpi_mask = m;
2085 } else {
2086 /* no mask support doesn't mean no event support... */
2087 hotkey_acpi_mask = hotkey_all_mask;
2088 }
2089
2090 /* sync userspace-visible mask */
2091 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2092
2093 return 0;
2094 }
2095
hotkey_mask_warn_incomplete_mask(void)2096 void static hotkey_mask_warn_incomplete_mask(void)
2097 {
2098 /* log only what the user can fix... */
2099 const u32 wantedmask = hotkey_driver_mask &
2100 ~(hotkey_acpi_mask | hotkey_source_mask) &
2101 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2102
2103 if (wantedmask)
2104 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2105 }
2106
2107 /*
2108 * Set the firmware mask when supported
2109 *
2110 * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2111 *
2112 * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2113 *
2114 * Call with hotkey_mutex held
2115 */
hotkey_mask_set(u32 mask)2116 static int hotkey_mask_set(u32 mask)
2117 {
2118 int i;
2119 int rc = 0;
2120
2121 const u32 fwmask = mask & ~hotkey_source_mask;
2122
2123 if (tp_features.hotkey_mask) {
2124 for (i = 0; i < 32; i++) {
2125 if (!acpi_evalf(hkey_handle,
2126 NULL, "MHKM", "vdd", i + 1,
2127 !!(mask & (1 << i)))) {
2128 rc = -EIO;
2129 break;
2130 }
2131 }
2132 }
2133
2134 /*
2135 * We *must* make an inconditional call to hotkey_mask_get to
2136 * refresh hotkey_acpi_mask and update hotkey_user_mask
2137 *
2138 * Take the opportunity to also log when we cannot _enable_
2139 * a given event.
2140 */
2141 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2142 pr_notice("asked for hotkey mask 0x%08x, but "
2143 "firmware forced it to 0x%08x\n",
2144 fwmask, hotkey_acpi_mask);
2145 }
2146
2147 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2148 hotkey_mask_warn_incomplete_mask();
2149
2150 return rc;
2151 }
2152
2153 /*
2154 * Sets hotkey_user_mask and tries to set the firmware mask
2155 *
2156 * Call with hotkey_mutex held
2157 */
hotkey_user_mask_set(const u32 mask)2158 static int hotkey_user_mask_set(const u32 mask)
2159 {
2160 int rc;
2161
2162 /* Give people a chance to notice they are doing something that
2163 * is bound to go boom on their users sooner or later */
2164 if (!tp_warned.hotkey_mask_ff &&
2165 (mask == 0xffff || mask == 0xffffff ||
2166 mask == 0xffffffff)) {
2167 tp_warned.hotkey_mask_ff = 1;
2168 pr_notice("setting the hotkey mask to 0x%08x is likely "
2169 "not the best way to go about it\n", mask);
2170 pr_notice("please consider using the driver defaults, "
2171 "and refer to up-to-date thinkpad-acpi "
2172 "documentation\n");
2173 }
2174
2175 /* Try to enable what the user asked for, plus whatever we need.
2176 * this syncs everything but won't enable bits in hotkey_user_mask */
2177 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2178
2179 /* Enable the available bits in hotkey_user_mask */
2180 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2181
2182 return rc;
2183 }
2184
2185 /*
2186 * Sets the driver hotkey mask.
2187 *
2188 * Can be called even if the hotkey subdriver is inactive
2189 */
tpacpi_hotkey_driver_mask_set(const u32 mask)2190 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2191 {
2192 int rc;
2193
2194 /* Do the right thing if hotkey_init has not been called yet */
2195 if (!tp_features.hotkey) {
2196 hotkey_driver_mask = mask;
2197 return 0;
2198 }
2199
2200 mutex_lock(&hotkey_mutex);
2201
2202 HOTKEY_CONFIG_CRITICAL_START
2203 hotkey_driver_mask = mask;
2204 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2205 hotkey_source_mask |= (mask & ~hotkey_all_mask);
2206 #endif
2207 HOTKEY_CONFIG_CRITICAL_END
2208
2209 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2210 ~hotkey_source_mask);
2211 hotkey_poll_setup(true);
2212
2213 mutex_unlock(&hotkey_mutex);
2214
2215 return rc;
2216 }
2217
hotkey_status_get(int * status)2218 static int hotkey_status_get(int *status)
2219 {
2220 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2221 return -EIO;
2222
2223 return 0;
2224 }
2225
hotkey_status_set(bool enable)2226 static int hotkey_status_set(bool enable)
2227 {
2228 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2229 return -EIO;
2230
2231 return 0;
2232 }
2233
tpacpi_input_send_tabletsw(void)2234 static void tpacpi_input_send_tabletsw(void)
2235 {
2236 int state;
2237
2238 if (tp_features.hotkey_tablet &&
2239 !hotkey_get_tablet_mode(&state)) {
2240 mutex_lock(&tpacpi_inputdev_send_mutex);
2241
2242 input_report_switch(tpacpi_inputdev,
2243 SW_TABLET_MODE, !!state);
2244 input_sync(tpacpi_inputdev);
2245
2246 mutex_unlock(&tpacpi_inputdev_send_mutex);
2247 }
2248 }
2249
2250 /* Do NOT call without validating scancode first */
tpacpi_input_send_key(const unsigned int scancode)2251 static void tpacpi_input_send_key(const unsigned int scancode)
2252 {
2253 const unsigned int keycode = hotkey_keycode_map[scancode];
2254
2255 if (keycode != KEY_RESERVED) {
2256 mutex_lock(&tpacpi_inputdev_send_mutex);
2257
2258 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2259 input_report_key(tpacpi_inputdev, keycode, 1);
2260 input_sync(tpacpi_inputdev);
2261
2262 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2263 input_report_key(tpacpi_inputdev, keycode, 0);
2264 input_sync(tpacpi_inputdev);
2265
2266 mutex_unlock(&tpacpi_inputdev_send_mutex);
2267 }
2268 }
2269
2270 /* Do NOT call without validating scancode first */
tpacpi_input_send_key_masked(const unsigned int scancode)2271 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2272 {
2273 hotkey_driver_event(scancode);
2274 if (hotkey_user_mask & (1 << scancode))
2275 tpacpi_input_send_key(scancode);
2276 }
2277
2278 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2279 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2280
2281 /* Do NOT call without validating scancode first */
tpacpi_hotkey_send_key(unsigned int scancode)2282 static void tpacpi_hotkey_send_key(unsigned int scancode)
2283 {
2284 tpacpi_input_send_key_masked(scancode);
2285 if (hotkey_report_mode < 2) {
2286 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2287 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2288 }
2289 }
2290
hotkey_read_nvram(struct tp_nvram_state * n,const u32 m)2291 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2292 {
2293 u8 d;
2294
2295 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2296 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2297 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2298 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2299 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2300 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2301 }
2302 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2303 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2304 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2305 }
2306 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2307 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2308 n->displayexp_toggle =
2309 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2310 }
2311 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2312 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2313 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2314 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2315 n->brightness_toggle =
2316 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2317 }
2318 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2319 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2320 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2321 >> TP_NVRAM_POS_LEVEL_VOLUME;
2322 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2323 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2324 }
2325 }
2326
hotkey_compare_and_issue_event(struct tp_nvram_state * oldn,struct tp_nvram_state * newn,const u32 event_mask)2327 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2328 struct tp_nvram_state *newn,
2329 const u32 event_mask)
2330 {
2331
2332 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2333 do { \
2334 if ((event_mask & (1 << __scancode)) && \
2335 oldn->__member != newn->__member) \
2336 tpacpi_hotkey_send_key(__scancode); \
2337 } while (0)
2338
2339 #define TPACPI_MAY_SEND_KEY(__scancode) \
2340 do { \
2341 if (event_mask & (1 << __scancode)) \
2342 tpacpi_hotkey_send_key(__scancode); \
2343 } while (0)
2344
2345 void issue_volchange(const unsigned int oldvol,
2346 const unsigned int newvol)
2347 {
2348 unsigned int i = oldvol;
2349
2350 while (i > newvol) {
2351 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2352 i--;
2353 }
2354 while (i < newvol) {
2355 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2356 i++;
2357 }
2358 }
2359
2360 void issue_brightnesschange(const unsigned int oldbrt,
2361 const unsigned int newbrt)
2362 {
2363 unsigned int i = oldbrt;
2364
2365 while (i > newbrt) {
2366 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2367 i--;
2368 }
2369 while (i < newbrt) {
2370 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2371 i++;
2372 }
2373 }
2374
2375 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2376 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2377 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2378 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2379
2380 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2381
2382 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2383
2384 /*
2385 * Handle volume
2386 *
2387 * This code is supposed to duplicate the IBM firmware behaviour:
2388 * - Pressing MUTE issues mute hotkey message, even when already mute
2389 * - Pressing Volume up/down issues volume up/down hotkey messages,
2390 * even when already at maximum or minimum volume
2391 * - The act of unmuting issues volume up/down notification,
2392 * depending which key was used to unmute
2393 *
2394 * We are constrained to what the NVRAM can tell us, which is not much
2395 * and certainly not enough if more than one volume hotkey was pressed
2396 * since the last poll cycle.
2397 *
2398 * Just to make our life interesting, some newer Lenovo ThinkPads have
2399 * bugs in the BIOS and may fail to update volume_toggle properly.
2400 */
2401 if (newn->mute) {
2402 /* muted */
2403 if (!oldn->mute ||
2404 oldn->volume_toggle != newn->volume_toggle ||
2405 oldn->volume_level != newn->volume_level) {
2406 /* recently muted, or repeated mute keypress, or
2407 * multiple presses ending in mute */
2408 issue_volchange(oldn->volume_level, newn->volume_level);
2409 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2410 }
2411 } else {
2412 /* unmute */
2413 if (oldn->mute) {
2414 /* recently unmuted, issue 'unmute' keypress */
2415 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2416 }
2417 if (oldn->volume_level != newn->volume_level) {
2418 issue_volchange(oldn->volume_level, newn->volume_level);
2419 } else if (oldn->volume_toggle != newn->volume_toggle) {
2420 /* repeated vol up/down keypress at end of scale ? */
2421 if (newn->volume_level == 0)
2422 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2423 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2424 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2425 }
2426 }
2427
2428 /* handle brightness */
2429 if (oldn->brightness_level != newn->brightness_level) {
2430 issue_brightnesschange(oldn->brightness_level,
2431 newn->brightness_level);
2432 } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2433 /* repeated key presses that didn't change state */
2434 if (newn->brightness_level == 0)
2435 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2436 else if (newn->brightness_level >= bright_maxlvl
2437 && !tp_features.bright_unkfw)
2438 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2439 }
2440
2441 #undef TPACPI_COMPARE_KEY
2442 #undef TPACPI_MAY_SEND_KEY
2443 }
2444
2445 /*
2446 * Polling driver
2447 *
2448 * We track all events in hotkey_source_mask all the time, since
2449 * most of them are edge-based. We only issue those requested by
2450 * hotkey_user_mask or hotkey_driver_mask, though.
2451 */
hotkey_kthread(void * data)2452 static int hotkey_kthread(void *data)
2453 {
2454 struct tp_nvram_state s[2];
2455 u32 poll_mask, event_mask;
2456 unsigned int si, so;
2457 unsigned long t;
2458 unsigned int change_detector;
2459 unsigned int poll_freq;
2460 bool was_frozen;
2461
2462 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2463 goto exit;
2464
2465 set_freezable();
2466
2467 so = 0;
2468 si = 1;
2469 t = 0;
2470
2471 /* Initial state for compares */
2472 mutex_lock(&hotkey_thread_data_mutex);
2473 change_detector = hotkey_config_change;
2474 poll_mask = hotkey_source_mask;
2475 event_mask = hotkey_source_mask &
2476 (hotkey_driver_mask | hotkey_user_mask);
2477 poll_freq = hotkey_poll_freq;
2478 mutex_unlock(&hotkey_thread_data_mutex);
2479 hotkey_read_nvram(&s[so], poll_mask);
2480
2481 while (!kthread_should_stop()) {
2482 if (t == 0) {
2483 if (likely(poll_freq))
2484 t = 1000/poll_freq;
2485 else
2486 t = 100; /* should never happen... */
2487 }
2488 t = msleep_interruptible(t);
2489 if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2490 break;
2491
2492 if (t > 0 && !was_frozen)
2493 continue;
2494
2495 mutex_lock(&hotkey_thread_data_mutex);
2496 if (was_frozen || hotkey_config_change != change_detector) {
2497 /* forget old state on thaw or config change */
2498 si = so;
2499 t = 0;
2500 change_detector = hotkey_config_change;
2501 }
2502 poll_mask = hotkey_source_mask;
2503 event_mask = hotkey_source_mask &
2504 (hotkey_driver_mask | hotkey_user_mask);
2505 poll_freq = hotkey_poll_freq;
2506 mutex_unlock(&hotkey_thread_data_mutex);
2507
2508 if (likely(poll_mask)) {
2509 hotkey_read_nvram(&s[si], poll_mask);
2510 if (likely(si != so)) {
2511 hotkey_compare_and_issue_event(&s[so], &s[si],
2512 event_mask);
2513 }
2514 }
2515
2516 so = si;
2517 si ^= 1;
2518 }
2519
2520 exit:
2521 return 0;
2522 }
2523
2524 /* call with hotkey_mutex held */
hotkey_poll_stop_sync(void)2525 static void hotkey_poll_stop_sync(void)
2526 {
2527 if (tpacpi_hotkey_task) {
2528 kthread_stop(tpacpi_hotkey_task);
2529 tpacpi_hotkey_task = NULL;
2530 }
2531 }
2532
2533 /* call with hotkey_mutex held */
hotkey_poll_setup(const bool may_warn)2534 static void hotkey_poll_setup(const bool may_warn)
2535 {
2536 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2537 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2538
2539 if (hotkey_poll_freq > 0 &&
2540 (poll_driver_mask ||
2541 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2542 if (!tpacpi_hotkey_task) {
2543 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2544 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2545 if (IS_ERR(tpacpi_hotkey_task)) {
2546 tpacpi_hotkey_task = NULL;
2547 pr_err("could not create kernel thread "
2548 "for hotkey polling\n");
2549 }
2550 }
2551 } else {
2552 hotkey_poll_stop_sync();
2553 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2554 hotkey_poll_freq == 0) {
2555 pr_notice("hot keys 0x%08x and/or events 0x%08x "
2556 "require polling, which is currently "
2557 "disabled\n",
2558 poll_user_mask, poll_driver_mask);
2559 }
2560 }
2561 }
2562
hotkey_poll_setup_safe(const bool may_warn)2563 static void hotkey_poll_setup_safe(const bool may_warn)
2564 {
2565 mutex_lock(&hotkey_mutex);
2566 hotkey_poll_setup(may_warn);
2567 mutex_unlock(&hotkey_mutex);
2568 }
2569
2570 /* call with hotkey_mutex held */
hotkey_poll_set_freq(unsigned int freq)2571 static void hotkey_poll_set_freq(unsigned int freq)
2572 {
2573 if (!freq)
2574 hotkey_poll_stop_sync();
2575
2576 hotkey_poll_freq = freq;
2577 }
2578
2579 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2580
hotkey_poll_setup(const bool __unused)2581 static void hotkey_poll_setup(const bool __unused)
2582 {
2583 }
2584
hotkey_poll_setup_safe(const bool __unused)2585 static void hotkey_poll_setup_safe(const bool __unused)
2586 {
2587 }
2588
2589 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2590
hotkey_inputdev_open(struct input_dev * dev)2591 static int hotkey_inputdev_open(struct input_dev *dev)
2592 {
2593 switch (tpacpi_lifecycle) {
2594 case TPACPI_LIFE_INIT:
2595 case TPACPI_LIFE_RUNNING:
2596 hotkey_poll_setup_safe(false);
2597 return 0;
2598 case TPACPI_LIFE_EXITING:
2599 return -EBUSY;
2600 }
2601
2602 /* Should only happen if tpacpi_lifecycle is corrupt */
2603 BUG();
2604 return -EBUSY;
2605 }
2606
hotkey_inputdev_close(struct input_dev * dev)2607 static void hotkey_inputdev_close(struct input_dev *dev)
2608 {
2609 /* disable hotkey polling when possible */
2610 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2611 !(hotkey_source_mask & hotkey_driver_mask))
2612 hotkey_poll_setup_safe(false);
2613 }
2614
2615 /* sysfs hotkey enable ------------------------------------------------- */
hotkey_enable_show(struct device * dev,struct device_attribute * attr,char * buf)2616 static ssize_t hotkey_enable_show(struct device *dev,
2617 struct device_attribute *attr,
2618 char *buf)
2619 {
2620 int res, status;
2621
2622 printk_deprecated_attribute("hotkey_enable",
2623 "Hotkey reporting is always enabled");
2624
2625 res = hotkey_status_get(&status);
2626 if (res)
2627 return res;
2628
2629 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2630 }
2631
hotkey_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2632 static ssize_t hotkey_enable_store(struct device *dev,
2633 struct device_attribute *attr,
2634 const char *buf, size_t count)
2635 {
2636 unsigned long t;
2637
2638 printk_deprecated_attribute("hotkey_enable",
2639 "Hotkeys can be disabled through hotkey_mask");
2640
2641 if (parse_strtoul(buf, 1, &t))
2642 return -EINVAL;
2643
2644 if (t == 0)
2645 return -EPERM;
2646
2647 return count;
2648 }
2649
2650 static struct device_attribute dev_attr_hotkey_enable =
2651 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2652 hotkey_enable_show, hotkey_enable_store);
2653
2654 /* sysfs hotkey mask --------------------------------------------------- */
hotkey_mask_show(struct device * dev,struct device_attribute * attr,char * buf)2655 static ssize_t hotkey_mask_show(struct device *dev,
2656 struct device_attribute *attr,
2657 char *buf)
2658 {
2659 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2660 }
2661
hotkey_mask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2662 static ssize_t hotkey_mask_store(struct device *dev,
2663 struct device_attribute *attr,
2664 const char *buf, size_t count)
2665 {
2666 unsigned long t;
2667 int res;
2668
2669 if (parse_strtoul(buf, 0xffffffffUL, &t))
2670 return -EINVAL;
2671
2672 if (mutex_lock_killable(&hotkey_mutex))
2673 return -ERESTARTSYS;
2674
2675 res = hotkey_user_mask_set(t);
2676
2677 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2678 hotkey_poll_setup(true);
2679 #endif
2680
2681 mutex_unlock(&hotkey_mutex);
2682
2683 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2684
2685 return (res) ? res : count;
2686 }
2687
2688 static struct device_attribute dev_attr_hotkey_mask =
2689 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2690 hotkey_mask_show, hotkey_mask_store);
2691
2692 /* sysfs hotkey bios_enabled ------------------------------------------- */
hotkey_bios_enabled_show(struct device * dev,struct device_attribute * attr,char * buf)2693 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2694 struct device_attribute *attr,
2695 char *buf)
2696 {
2697 return sprintf(buf, "0\n");
2698 }
2699
2700 static struct device_attribute dev_attr_hotkey_bios_enabled =
2701 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2702
2703 /* sysfs hotkey bios_mask ---------------------------------------------- */
hotkey_bios_mask_show(struct device * dev,struct device_attribute * attr,char * buf)2704 static ssize_t hotkey_bios_mask_show(struct device *dev,
2705 struct device_attribute *attr,
2706 char *buf)
2707 {
2708 printk_deprecated_attribute("hotkey_bios_mask",
2709 "This attribute is useless.");
2710 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2711 }
2712
2713 static struct device_attribute dev_attr_hotkey_bios_mask =
2714 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2715
2716 /* sysfs hotkey all_mask ----------------------------------------------- */
hotkey_all_mask_show(struct device * dev,struct device_attribute * attr,char * buf)2717 static ssize_t hotkey_all_mask_show(struct device *dev,
2718 struct device_attribute *attr,
2719 char *buf)
2720 {
2721 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2722 hotkey_all_mask | hotkey_source_mask);
2723 }
2724
2725 static struct device_attribute dev_attr_hotkey_all_mask =
2726 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2727
2728 /* sysfs hotkey recommended_mask --------------------------------------- */
hotkey_recommended_mask_show(struct device * dev,struct device_attribute * attr,char * buf)2729 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2730 struct device_attribute *attr,
2731 char *buf)
2732 {
2733 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2734 (hotkey_all_mask | hotkey_source_mask)
2735 & ~hotkey_reserved_mask);
2736 }
2737
2738 static struct device_attribute dev_attr_hotkey_recommended_mask =
2739 __ATTR(hotkey_recommended_mask, S_IRUGO,
2740 hotkey_recommended_mask_show, NULL);
2741
2742 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2743
2744 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
hotkey_source_mask_show(struct device * dev,struct device_attribute * attr,char * buf)2745 static ssize_t hotkey_source_mask_show(struct device *dev,
2746 struct device_attribute *attr,
2747 char *buf)
2748 {
2749 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2750 }
2751
hotkey_source_mask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2752 static ssize_t hotkey_source_mask_store(struct device *dev,
2753 struct device_attribute *attr,
2754 const char *buf, size_t count)
2755 {
2756 unsigned long t;
2757 u32 r_ev;
2758 int rc;
2759
2760 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2761 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2762 return -EINVAL;
2763
2764 if (mutex_lock_killable(&hotkey_mutex))
2765 return -ERESTARTSYS;
2766
2767 HOTKEY_CONFIG_CRITICAL_START
2768 hotkey_source_mask = t;
2769 HOTKEY_CONFIG_CRITICAL_END
2770
2771 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2772 ~hotkey_source_mask);
2773 hotkey_poll_setup(true);
2774
2775 /* check if events needed by the driver got disabled */
2776 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2777 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2778
2779 mutex_unlock(&hotkey_mutex);
2780
2781 if (rc < 0)
2782 pr_err("hotkey_source_mask: "
2783 "failed to update the firmware event mask!\n");
2784
2785 if (r_ev)
2786 pr_notice("hotkey_source_mask: "
2787 "some important events were disabled: 0x%04x\n",
2788 r_ev);
2789
2790 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2791
2792 return (rc < 0) ? rc : count;
2793 }
2794
2795 static struct device_attribute dev_attr_hotkey_source_mask =
2796 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2797 hotkey_source_mask_show, hotkey_source_mask_store);
2798
2799 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
hotkey_poll_freq_show(struct device * dev,struct device_attribute * attr,char * buf)2800 static ssize_t hotkey_poll_freq_show(struct device *dev,
2801 struct device_attribute *attr,
2802 char *buf)
2803 {
2804 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2805 }
2806
hotkey_poll_freq_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2807 static ssize_t hotkey_poll_freq_store(struct device *dev,
2808 struct device_attribute *attr,
2809 const char *buf, size_t count)
2810 {
2811 unsigned long t;
2812
2813 if (parse_strtoul(buf, 25, &t))
2814 return -EINVAL;
2815
2816 if (mutex_lock_killable(&hotkey_mutex))
2817 return -ERESTARTSYS;
2818
2819 hotkey_poll_set_freq(t);
2820 hotkey_poll_setup(true);
2821
2822 mutex_unlock(&hotkey_mutex);
2823
2824 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2825
2826 return count;
2827 }
2828
2829 static struct device_attribute dev_attr_hotkey_poll_freq =
2830 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2831 hotkey_poll_freq_show, hotkey_poll_freq_store);
2832
2833 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2834
2835 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
hotkey_radio_sw_show(struct device * dev,struct device_attribute * attr,char * buf)2836 static ssize_t hotkey_radio_sw_show(struct device *dev,
2837 struct device_attribute *attr,
2838 char *buf)
2839 {
2840 int res;
2841 res = hotkey_get_wlsw();
2842 if (res < 0)
2843 return res;
2844
2845 /* Opportunistic update */
2846 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2847
2848 return snprintf(buf, PAGE_SIZE, "%d\n",
2849 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2850 }
2851
2852 static struct device_attribute dev_attr_hotkey_radio_sw =
2853 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2854
hotkey_radio_sw_notify_change(void)2855 static void hotkey_radio_sw_notify_change(void)
2856 {
2857 if (tp_features.hotkey_wlsw)
2858 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2859 "hotkey_radio_sw");
2860 }
2861
2862 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
hotkey_tablet_mode_show(struct device * dev,struct device_attribute * attr,char * buf)2863 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2864 struct device_attribute *attr,
2865 char *buf)
2866 {
2867 int res, s;
2868 res = hotkey_get_tablet_mode(&s);
2869 if (res < 0)
2870 return res;
2871
2872 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2873 }
2874
2875 static struct device_attribute dev_attr_hotkey_tablet_mode =
2876 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2877
hotkey_tablet_mode_notify_change(void)2878 static void hotkey_tablet_mode_notify_change(void)
2879 {
2880 if (tp_features.hotkey_tablet)
2881 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2882 "hotkey_tablet_mode");
2883 }
2884
2885 /* sysfs hotkey report_mode -------------------------------------------- */
hotkey_report_mode_show(struct device * dev,struct device_attribute * attr,char * buf)2886 static ssize_t hotkey_report_mode_show(struct device *dev,
2887 struct device_attribute *attr,
2888 char *buf)
2889 {
2890 return snprintf(buf, PAGE_SIZE, "%d\n",
2891 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2892 }
2893
2894 static struct device_attribute dev_attr_hotkey_report_mode =
2895 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2896
2897 /* sysfs wakeup reason (pollable) -------------------------------------- */
hotkey_wakeup_reason_show(struct device * dev,struct device_attribute * attr,char * buf)2898 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2899 struct device_attribute *attr,
2900 char *buf)
2901 {
2902 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2903 }
2904
2905 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2906 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2907
hotkey_wakeup_reason_notify_change(void)2908 static void hotkey_wakeup_reason_notify_change(void)
2909 {
2910 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2911 "wakeup_reason");
2912 }
2913
2914 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
hotkey_wakeup_hotunplug_complete_show(struct device * dev,struct device_attribute * attr,char * buf)2915 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2916 struct device_attribute *attr,
2917 char *buf)
2918 {
2919 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2920 }
2921
2922 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2923 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2924 hotkey_wakeup_hotunplug_complete_show, NULL);
2925
hotkey_wakeup_hotunplug_complete_notify_change(void)2926 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2927 {
2928 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2929 "wakeup_hotunplug_complete");
2930 }
2931
2932 /* --------------------------------------------------------------------- */
2933
2934 static struct attribute *hotkey_attributes[] __initdata = {
2935 &dev_attr_hotkey_enable.attr,
2936 &dev_attr_hotkey_bios_enabled.attr,
2937 &dev_attr_hotkey_bios_mask.attr,
2938 &dev_attr_hotkey_report_mode.attr,
2939 &dev_attr_hotkey_wakeup_reason.attr,
2940 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2941 &dev_attr_hotkey_mask.attr,
2942 &dev_attr_hotkey_all_mask.attr,
2943 &dev_attr_hotkey_recommended_mask.attr,
2944 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2945 &dev_attr_hotkey_source_mask.attr,
2946 &dev_attr_hotkey_poll_freq.attr,
2947 #endif
2948 };
2949
2950 /*
2951 * Sync both the hw and sw blocking state of all switches
2952 */
tpacpi_send_radiosw_update(void)2953 static void tpacpi_send_radiosw_update(void)
2954 {
2955 int wlsw;
2956
2957 /*
2958 * We must sync all rfkill controllers *before* issuing any
2959 * rfkill input events, or we will race the rfkill core input
2960 * handler.
2961 *
2962 * tpacpi_inputdev_send_mutex works as a synchronization point
2963 * for the above.
2964 *
2965 * We optimize to avoid numerous calls to hotkey_get_wlsw.
2966 */
2967
2968 wlsw = hotkey_get_wlsw();
2969
2970 /* Sync hw blocking state first if it is hw-blocked */
2971 if (wlsw == TPACPI_RFK_RADIO_OFF)
2972 tpacpi_rfk_update_hwblock_state(true);
2973
2974 /* Sync sw blocking state */
2975 tpacpi_rfk_update_swstate_all();
2976
2977 /* Sync hw blocking state last if it is hw-unblocked */
2978 if (wlsw == TPACPI_RFK_RADIO_ON)
2979 tpacpi_rfk_update_hwblock_state(false);
2980
2981 /* Issue rfkill input event for WLSW switch */
2982 if (!(wlsw < 0)) {
2983 mutex_lock(&tpacpi_inputdev_send_mutex);
2984
2985 input_report_switch(tpacpi_inputdev,
2986 SW_RFKILL_ALL, (wlsw > 0));
2987 input_sync(tpacpi_inputdev);
2988
2989 mutex_unlock(&tpacpi_inputdev_send_mutex);
2990 }
2991
2992 /*
2993 * this can be unconditional, as we will poll state again
2994 * if userspace uses the notify to read data
2995 */
2996 hotkey_radio_sw_notify_change();
2997 }
2998
hotkey_exit(void)2999 static void hotkey_exit(void)
3000 {
3001 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3002 mutex_lock(&hotkey_mutex);
3003 hotkey_poll_stop_sync();
3004 mutex_unlock(&hotkey_mutex);
3005 #endif
3006
3007 if (hotkey_dev_attributes)
3008 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3009
3010 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3011 "restoring original HKEY status and mask\n");
3012 /* yes, there is a bitwise or below, we want the
3013 * functions to be called even if one of them fail */
3014 if (((tp_features.hotkey_mask &&
3015 hotkey_mask_set(hotkey_orig_mask)) |
3016 hotkey_status_set(false)) != 0)
3017 pr_err("failed to restore hot key mask "
3018 "to BIOS defaults\n");
3019 }
3020
hotkey_unmap(const unsigned int scancode)3021 static void __init hotkey_unmap(const unsigned int scancode)
3022 {
3023 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3024 clear_bit(hotkey_keycode_map[scancode],
3025 tpacpi_inputdev->keybit);
3026 hotkey_keycode_map[scancode] = KEY_RESERVED;
3027 }
3028 }
3029
3030 /*
3031 * HKEY quirks:
3032 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3033 */
3034
3035 #define TPACPI_HK_Q_INIMASK 0x0001
3036
3037 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3038 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3039 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3040 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3041 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3042 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3043 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3044 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3045 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3046 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3047 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3048 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3049 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3050 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3051 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3052 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3053 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3054 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3055 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3056 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3057 };
3058
3059 typedef u16 tpacpi_keymap_entry_t;
3060 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3061
hotkey_init(struct ibm_init_struct * iibm)3062 static int __init hotkey_init(struct ibm_init_struct *iibm)
3063 {
3064 /* Requirements for changing the default keymaps:
3065 *
3066 * 1. Many of the keys are mapped to KEY_RESERVED for very
3067 * good reasons. Do not change them unless you have deep
3068 * knowledge on the IBM and Lenovo ThinkPad firmware for
3069 * the various ThinkPad models. The driver behaves
3070 * differently for KEY_RESERVED: such keys have their
3071 * hot key mask *unset* in mask_recommended, and also
3072 * in the initial hot key mask programmed into the
3073 * firmware at driver load time, which means the firm-
3074 * ware may react very differently if you change them to
3075 * something else;
3076 *
3077 * 2. You must be subscribed to the linux-thinkpad and
3078 * ibm-acpi-devel mailing lists, and you should read the
3079 * list archives since 2007 if you want to change the
3080 * keymaps. This requirement exists so that you will
3081 * know the past history of problems with the thinkpad-
3082 * acpi driver keymaps, and also that you will be
3083 * listening to any bug reports;
3084 *
3085 * 3. Do not send thinkpad-acpi specific patches directly to
3086 * for merging, *ever*. Send them to the linux-acpi
3087 * mailinglist for comments. Merging is to be done only
3088 * through acpi-test and the ACPI maintainer.
3089 *
3090 * If the above is too much to ask, don't change the keymap.
3091 * Ask the thinkpad-acpi maintainer to do it, instead.
3092 */
3093
3094 enum keymap_index {
3095 TPACPI_KEYMAP_IBM_GENERIC = 0,
3096 TPACPI_KEYMAP_LENOVO_GENERIC,
3097 };
3098
3099 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3100 /* Generic keymap for IBM ThinkPads */
3101 [TPACPI_KEYMAP_IBM_GENERIC] = {
3102 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3103 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP,
3104 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3105 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3106
3107 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3108 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3109 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3110 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3111
3112 /* brightness: firmware always reacts to them */
3113 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3114 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3115
3116 /* Thinklight: firmware always react to it */
3117 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3118
3119 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3120 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3121
3122 /* Volume: firmware always react to it and reprograms
3123 * the built-in *extra* mixer. Never map it to control
3124 * another mixer by default. */
3125 KEY_RESERVED, /* 0x14: VOLUME UP */
3126 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3127 KEY_RESERVED, /* 0x16: MUTE */
3128
3129 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3130
3131 /* (assignments unknown, please report if found) */
3132 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3133 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3134 },
3135
3136 /* Generic keymap for Lenovo ThinkPads */
3137 [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3138 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3139 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3140 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3141 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3142
3143 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3144 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3145 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3146 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3147
3148 /* These should be enabled --only-- when ACPI video
3149 * is disabled (i.e. in "vendor" mode), and are handled
3150 * in a special way by the init code */
3151 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3152 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3153
3154 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3155
3156 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3157 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3158
3159 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3160 * react to it and reprograms the built-in *extra* mixer.
3161 * Never map it to control another mixer by default.
3162 *
3163 * T60?, T61, R60?, R61: firmware and EC tries to send
3164 * these over the regular keyboard, so these are no-ops,
3165 * but there are still weird bugs re. MUTE, so do not
3166 * change unless you get test reports from all Lenovo
3167 * models. May cause the BIOS to interfere with the
3168 * HDA mixer.
3169 */
3170 KEY_RESERVED, /* 0x14: VOLUME UP */
3171 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3172 KEY_RESERVED, /* 0x16: MUTE */
3173
3174 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3175
3176 /* (assignments unknown, please report if found) */
3177 KEY_UNKNOWN, KEY_UNKNOWN,
3178
3179 /*
3180 * The mic mute button only sends 0x1a. It does not
3181 * automatically mute the mic or change the mute light.
3182 */
3183 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */
3184
3185 /* (assignments unknown, please report if found) */
3186 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3187 KEY_UNKNOWN,
3188 },
3189 };
3190
3191 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3192 /* Generic maps (fallback) */
3193 {
3194 .vendor = PCI_VENDOR_ID_IBM,
3195 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3196 .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3197 },
3198 {
3199 .vendor = PCI_VENDOR_ID_LENOVO,
3200 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3201 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3202 },
3203 };
3204
3205 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t)
3206 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t)
3207
3208 int res, i;
3209 int status;
3210 int hkeyv;
3211 bool radiosw_state = false;
3212 bool tabletsw_state = false;
3213
3214 unsigned long quirks;
3215 unsigned long keymap_id;
3216
3217 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3218 "initializing hotkey subdriver\n");
3219
3220 BUG_ON(!tpacpi_inputdev);
3221 BUG_ON(tpacpi_inputdev->open != NULL ||
3222 tpacpi_inputdev->close != NULL);
3223
3224 TPACPI_ACPIHANDLE_INIT(hkey);
3225 mutex_init(&hotkey_mutex);
3226
3227 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3228 mutex_init(&hotkey_thread_data_mutex);
3229 #endif
3230
3231 /* hotkey not supported on 570 */
3232 tp_features.hotkey = hkey_handle != NULL;
3233
3234 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3235 "hotkeys are %s\n",
3236 str_supported(tp_features.hotkey));
3237
3238 if (!tp_features.hotkey)
3239 return 1;
3240
3241 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3242 ARRAY_SIZE(tpacpi_hotkey_qtable));
3243
3244 tpacpi_disable_brightness_delay();
3245
3246 /* MUST have enough space for all attributes to be added to
3247 * hotkey_dev_attributes */
3248 hotkey_dev_attributes = create_attr_set(
3249 ARRAY_SIZE(hotkey_attributes) + 2,
3250 NULL);
3251 if (!hotkey_dev_attributes)
3252 return -ENOMEM;
3253 res = add_many_to_attr_set(hotkey_dev_attributes,
3254 hotkey_attributes,
3255 ARRAY_SIZE(hotkey_attributes));
3256 if (res)
3257 goto err_exit;
3258
3259 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3260 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3261 for HKEY interface version 0x100 */
3262 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3263 if ((hkeyv >> 8) != 1) {
3264 pr_err("unknown version of the HKEY interface: 0x%x\n",
3265 hkeyv);
3266 pr_err("please report this to %s\n", TPACPI_MAIL);
3267 } else {
3268 /*
3269 * MHKV 0x100 in A31, R40, R40e,
3270 * T4x, X31, and later
3271 */
3272 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3273 "firmware HKEY interface version: 0x%x\n",
3274 hkeyv);
3275
3276 /* Paranoia check AND init hotkey_all_mask */
3277 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3278 "MHKA", "qd")) {
3279 pr_err("missing MHKA handler, "
3280 "please report this to %s\n",
3281 TPACPI_MAIL);
3282 /* Fallback: pre-init for FN+F3,F4,F12 */
3283 hotkey_all_mask = 0x080cU;
3284 } else {
3285 tp_features.hotkey_mask = 1;
3286 }
3287 }
3288 }
3289
3290 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3291 "hotkey masks are %s\n",
3292 str_supported(tp_features.hotkey_mask));
3293
3294 /* Init hotkey_all_mask if not initialized yet */
3295 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3296 (quirks & TPACPI_HK_Q_INIMASK))
3297 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3298
3299 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3300 if (tp_features.hotkey_mask) {
3301 /* hotkey_source_mask *must* be zero for
3302 * the first hotkey_mask_get to return hotkey_orig_mask */
3303 res = hotkey_mask_get();
3304 if (res)
3305 goto err_exit;
3306
3307 hotkey_orig_mask = hotkey_acpi_mask;
3308 } else {
3309 hotkey_orig_mask = hotkey_all_mask;
3310 hotkey_acpi_mask = hotkey_all_mask;
3311 }
3312
3313 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3314 if (dbg_wlswemul) {
3315 tp_features.hotkey_wlsw = 1;
3316 radiosw_state = !!tpacpi_wlsw_emulstate;
3317 pr_info("radio switch emulation enabled\n");
3318 } else
3319 #endif
3320 /* Not all thinkpads have a hardware radio switch */
3321 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3322 tp_features.hotkey_wlsw = 1;
3323 radiosw_state = !!status;
3324 pr_info("radio switch found; radios are %s\n",
3325 enabled(status, 0));
3326 }
3327 if (tp_features.hotkey_wlsw)
3328 res = add_to_attr_set(hotkey_dev_attributes,
3329 &dev_attr_hotkey_radio_sw.attr);
3330
3331 /* For X41t, X60t, X61t Tablets... */
3332 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3333 tp_features.hotkey_tablet = 1;
3334 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3335 pr_info("possible tablet mode switch found; "
3336 "ThinkPad in %s mode\n",
3337 (tabletsw_state) ? "tablet" : "laptop");
3338 res = add_to_attr_set(hotkey_dev_attributes,
3339 &dev_attr_hotkey_tablet_mode.attr);
3340 }
3341
3342 if (!res)
3343 res = register_attr_set_with_sysfs(
3344 hotkey_dev_attributes,
3345 &tpacpi_pdev->dev.kobj);
3346 if (res)
3347 goto err_exit;
3348
3349 /* Set up key map */
3350 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3351 GFP_KERNEL);
3352 if (!hotkey_keycode_map) {
3353 pr_err("failed to allocate memory for key map\n");
3354 res = -ENOMEM;
3355 goto err_exit;
3356 }
3357
3358 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3359 ARRAY_SIZE(tpacpi_keymap_qtable));
3360 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3361 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3362 "using keymap number %lu\n", keymap_id);
3363
3364 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id],
3365 TPACPI_HOTKEY_MAP_SIZE);
3366
3367 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3368 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3369 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3370 tpacpi_inputdev->keycode = hotkey_keycode_map;
3371 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3372 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3373 input_set_capability(tpacpi_inputdev, EV_KEY,
3374 hotkey_keycode_map[i]);
3375 } else {
3376 if (i < sizeof(hotkey_reserved_mask)*8)
3377 hotkey_reserved_mask |= 1 << i;
3378 }
3379 }
3380
3381 if (tp_features.hotkey_wlsw) {
3382 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3383 input_report_switch(tpacpi_inputdev,
3384 SW_RFKILL_ALL, radiosw_state);
3385 }
3386 if (tp_features.hotkey_tablet) {
3387 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3388 input_report_switch(tpacpi_inputdev,
3389 SW_TABLET_MODE, tabletsw_state);
3390 }
3391
3392 /* Do not issue duplicate brightness change events to
3393 * userspace. tpacpi_detect_brightness_capabilities() must have
3394 * been called before this point */
3395 if (acpi_video_backlight_support()) {
3396 pr_info("This ThinkPad has standard ACPI backlight "
3397 "brightness control, supported by the ACPI "
3398 "video driver\n");
3399 pr_notice("Disabling thinkpad-acpi brightness events "
3400 "by default...\n");
3401
3402 /* Disable brightness up/down on Lenovo thinkpads when
3403 * ACPI is handling them, otherwise it is plain impossible
3404 * for userspace to do something even remotely sane */
3405 hotkey_reserved_mask |=
3406 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3407 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3408 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3409 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3410 }
3411
3412 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3413 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3414 & ~hotkey_all_mask
3415 & ~hotkey_reserved_mask;
3416
3417 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3418 "hotkey source mask 0x%08x, polling freq %u\n",
3419 hotkey_source_mask, hotkey_poll_freq);
3420 #endif
3421
3422 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3423 "enabling firmware HKEY event interface...\n");
3424 res = hotkey_status_set(true);
3425 if (res) {
3426 hotkey_exit();
3427 return res;
3428 }
3429 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3430 | hotkey_driver_mask)
3431 & ~hotkey_source_mask);
3432 if (res < 0 && res != -ENXIO) {
3433 hotkey_exit();
3434 return res;
3435 }
3436 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3437 & ~hotkey_reserved_mask;
3438 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3439 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3440 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3441
3442 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3443 "legacy ibm/hotkey event reporting over procfs %s\n",
3444 (hotkey_report_mode < 2) ?
3445 "enabled" : "disabled");
3446
3447 tpacpi_inputdev->open = &hotkey_inputdev_open;
3448 tpacpi_inputdev->close = &hotkey_inputdev_close;
3449
3450 hotkey_poll_setup_safe(true);
3451
3452 return 0;
3453
3454 err_exit:
3455 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3456 hotkey_dev_attributes = NULL;
3457
3458 return (res < 0)? res : 1;
3459 }
3460
hotkey_notify_hotkey(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3461 static bool hotkey_notify_hotkey(const u32 hkey,
3462 bool *send_acpi_ev,
3463 bool *ignore_acpi_ev)
3464 {
3465 /* 0x1000-0x1FFF: key presses */
3466 unsigned int scancode = hkey & 0xfff;
3467 *send_acpi_ev = true;
3468 *ignore_acpi_ev = false;
3469
3470 /* HKEY event 0x1001 is scancode 0x00 */
3471 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) {
3472 scancode--;
3473 if (!(hotkey_source_mask & (1 << scancode))) {
3474 tpacpi_input_send_key_masked(scancode);
3475 *send_acpi_ev = false;
3476 } else {
3477 *ignore_acpi_ev = true;
3478 }
3479 return true;
3480 }
3481 return false;
3482 }
3483
hotkey_notify_wakeup(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3484 static bool hotkey_notify_wakeup(const u32 hkey,
3485 bool *send_acpi_ev,
3486 bool *ignore_acpi_ev)
3487 {
3488 /* 0x2000-0x2FFF: Wakeup reason */
3489 *send_acpi_ev = true;
3490 *ignore_acpi_ev = false;
3491
3492 switch (hkey) {
3493 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3494 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3495 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3496 *ignore_acpi_ev = true;
3497 break;
3498
3499 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3500 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3501 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3502 *ignore_acpi_ev = true;
3503 break;
3504
3505 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3506 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3507 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3508 /* how to auto-heal: */
3509 /* 2313: woke up from S3, go to S4/S5 */
3510 /* 2413: woke up from S4, go to S5 */
3511 break;
3512
3513 default:
3514 return false;
3515 }
3516
3517 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3518 pr_info("woke up due to a hot-unplug request...\n");
3519 hotkey_wakeup_reason_notify_change();
3520 }
3521 return true;
3522 }
3523
hotkey_notify_dockevent(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3524 static bool hotkey_notify_dockevent(const u32 hkey,
3525 bool *send_acpi_ev,
3526 bool *ignore_acpi_ev)
3527 {
3528 /* 0x4000-0x4FFF: dock-related events */
3529 *send_acpi_ev = true;
3530 *ignore_acpi_ev = false;
3531
3532 switch (hkey) {
3533 case TP_HKEY_EV_UNDOCK_ACK:
3534 /* ACPI undock operation completed after wakeup */
3535 hotkey_autosleep_ack = 1;
3536 pr_info("undocked\n");
3537 hotkey_wakeup_hotunplug_complete_notify_change();
3538 return true;
3539
3540 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3541 pr_info("docked into hotplug port replicator\n");
3542 return true;
3543 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3544 pr_info("undocked from hotplug port replicator\n");
3545 return true;
3546
3547 default:
3548 return false;
3549 }
3550 }
3551
hotkey_notify_usrevent(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3552 static bool hotkey_notify_usrevent(const u32 hkey,
3553 bool *send_acpi_ev,
3554 bool *ignore_acpi_ev)
3555 {
3556 /* 0x5000-0x5FFF: human interface helpers */
3557 *send_acpi_ev = true;
3558 *ignore_acpi_ev = false;
3559
3560 switch (hkey) {
3561 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3562 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3563 return true;
3564
3565 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3566 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3567 tpacpi_input_send_tabletsw();
3568 hotkey_tablet_mode_notify_change();
3569 *send_acpi_ev = false;
3570 return true;
3571
3572 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3573 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3574 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3575 /* do not propagate these events */
3576 *ignore_acpi_ev = true;
3577 return true;
3578
3579 default:
3580 return false;
3581 }
3582 }
3583
3584 static void thermal_dump_all_sensors(void);
3585
hotkey_notify_6xxx(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3586 static bool hotkey_notify_6xxx(const u32 hkey,
3587 bool *send_acpi_ev,
3588 bool *ignore_acpi_ev)
3589 {
3590 bool known = true;
3591
3592 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
3593 *send_acpi_ev = true;
3594 *ignore_acpi_ev = false;
3595
3596 switch (hkey) {
3597 case TP_HKEY_EV_THM_TABLE_CHANGED:
3598 pr_info("EC reports that Thermal Table has changed\n");
3599 /* recommended action: do nothing, we don't have
3600 * Lenovo ATM information */
3601 return true;
3602 case TP_HKEY_EV_ALARM_BAT_HOT:
3603 pr_crit("THERMAL ALARM: battery is too hot!\n");
3604 /* recommended action: warn user through gui */
3605 break;
3606 case TP_HKEY_EV_ALARM_BAT_XHOT:
3607 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3608 /* recommended action: immediate sleep/hibernate */
3609 break;
3610 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3611 pr_crit("THERMAL ALARM: "
3612 "a sensor reports something is too hot!\n");
3613 /* recommended action: warn user through gui, that */
3614 /* some internal component is too hot */
3615 break;
3616 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3617 pr_alert("THERMAL EMERGENCY: "
3618 "a sensor reports something is extremely hot!\n");
3619 /* recommended action: immediate sleep/hibernate */
3620 break;
3621 case TP_HKEY_EV_AC_CHANGED:
3622 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
3623 * AC status changed; can be triggered by plugging or
3624 * unplugging AC adapter, docking or undocking. */
3625
3626 /* fallthrough */
3627
3628 case TP_HKEY_EV_KEY_NUMLOCK:
3629 case TP_HKEY_EV_KEY_FN:
3630 /* key press events, we just ignore them as long as the EC
3631 * is still reporting them in the normal keyboard stream */
3632 *send_acpi_ev = false;
3633 *ignore_acpi_ev = true;
3634 return true;
3635
3636 default:
3637 pr_warn("unknown possible thermal alarm or keyboard event received\n");
3638 known = false;
3639 }
3640
3641 thermal_dump_all_sensors();
3642
3643 return known;
3644 }
3645
hotkey_notify(struct ibm_struct * ibm,u32 event)3646 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3647 {
3648 u32 hkey;
3649 bool send_acpi_ev;
3650 bool ignore_acpi_ev;
3651 bool known_ev;
3652
3653 if (event != 0x80) {
3654 pr_err("unknown HKEY notification event %d\n", event);
3655 /* forward it to userspace, maybe it knows how to handle it */
3656 acpi_bus_generate_netlink_event(
3657 ibm->acpi->device->pnp.device_class,
3658 dev_name(&ibm->acpi->device->dev),
3659 event, 0);
3660 return;
3661 }
3662
3663 while (1) {
3664 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3665 pr_err("failed to retrieve HKEY event\n");
3666 return;
3667 }
3668
3669 if (hkey == 0) {
3670 /* queue empty */
3671 return;
3672 }
3673
3674 send_acpi_ev = true;
3675 ignore_acpi_ev = false;
3676
3677 switch (hkey >> 12) {
3678 case 1:
3679 /* 0x1000-0x1FFF: key presses */
3680 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3681 &ignore_acpi_ev);
3682 break;
3683 case 2:
3684 /* 0x2000-0x2FFF: Wakeup reason */
3685 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3686 &ignore_acpi_ev);
3687 break;
3688 case 3:
3689 /* 0x3000-0x3FFF: bay-related wakeups */
3690 switch (hkey) {
3691 case TP_HKEY_EV_BAYEJ_ACK:
3692 hotkey_autosleep_ack = 1;
3693 pr_info("bay ejected\n");
3694 hotkey_wakeup_hotunplug_complete_notify_change();
3695 known_ev = true;
3696 break;
3697 case TP_HKEY_EV_OPTDRV_EJ:
3698 /* FIXME: kick libata if SATA link offline */
3699 known_ev = true;
3700 break;
3701 default:
3702 known_ev = false;
3703 }
3704 break;
3705 case 4:
3706 /* 0x4000-0x4FFF: dock-related events */
3707 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
3708 &ignore_acpi_ev);
3709 break;
3710 case 5:
3711 /* 0x5000-0x5FFF: human interface helpers */
3712 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3713 &ignore_acpi_ev);
3714 break;
3715 case 6:
3716 /* 0x6000-0x6FFF: thermal alarms/notices and
3717 * keyboard events */
3718 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
3719 &ignore_acpi_ev);
3720 break;
3721 case 7:
3722 /* 0x7000-0x7FFF: misc */
3723 if (tp_features.hotkey_wlsw &&
3724 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3725 tpacpi_send_radiosw_update();
3726 send_acpi_ev = 0;
3727 known_ev = true;
3728 break;
3729 }
3730 /* fallthrough to default */
3731 default:
3732 known_ev = false;
3733 }
3734 if (!known_ev) {
3735 pr_notice("unhandled HKEY event 0x%04x\n", hkey);
3736 pr_notice("please report the conditions when this "
3737 "event happened to %s\n", TPACPI_MAIL);
3738 }
3739
3740 /* Legacy events */
3741 if (!ignore_acpi_ev &&
3742 (send_acpi_ev || hotkey_report_mode < 2)) {
3743 acpi_bus_generate_proc_event(ibm->acpi->device,
3744 event, hkey);
3745 }
3746
3747 /* netlink events */
3748 if (!ignore_acpi_ev && send_acpi_ev) {
3749 acpi_bus_generate_netlink_event(
3750 ibm->acpi->device->pnp.device_class,
3751 dev_name(&ibm->acpi->device->dev),
3752 event, hkey);
3753 }
3754 }
3755 }
3756
hotkey_suspend(void)3757 static void hotkey_suspend(void)
3758 {
3759 /* Do these on suspend, we get the events on early resume! */
3760 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3761 hotkey_autosleep_ack = 0;
3762 }
3763
hotkey_resume(void)3764 static void hotkey_resume(void)
3765 {
3766 tpacpi_disable_brightness_delay();
3767
3768 if (hotkey_status_set(true) < 0 ||
3769 hotkey_mask_set(hotkey_acpi_mask) < 0)
3770 pr_err("error while attempting to reset the event "
3771 "firmware interface\n");
3772
3773 tpacpi_send_radiosw_update();
3774 hotkey_tablet_mode_notify_change();
3775 hotkey_wakeup_reason_notify_change();
3776 hotkey_wakeup_hotunplug_complete_notify_change();
3777 hotkey_poll_setup_safe(false);
3778 }
3779
3780 /* procfs -------------------------------------------------------------- */
hotkey_read(struct seq_file * m)3781 static int hotkey_read(struct seq_file *m)
3782 {
3783 int res, status;
3784
3785 if (!tp_features.hotkey) {
3786 seq_printf(m, "status:\t\tnot supported\n");
3787 return 0;
3788 }
3789
3790 if (mutex_lock_killable(&hotkey_mutex))
3791 return -ERESTARTSYS;
3792 res = hotkey_status_get(&status);
3793 if (!res)
3794 res = hotkey_mask_get();
3795 mutex_unlock(&hotkey_mutex);
3796 if (res)
3797 return res;
3798
3799 seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3800 if (hotkey_all_mask) {
3801 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3802 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3803 } else {
3804 seq_printf(m, "mask:\t\tnot supported\n");
3805 seq_printf(m, "commands:\tenable, disable, reset\n");
3806 }
3807
3808 return 0;
3809 }
3810
hotkey_enabledisable_warn(bool enable)3811 static void hotkey_enabledisable_warn(bool enable)
3812 {
3813 tpacpi_log_usertask("procfs hotkey enable/disable");
3814 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3815 pr_fmt("hotkey enable/disable functionality has been "
3816 "removed from the driver. "
3817 "Hotkeys are always enabled.\n")))
3818 pr_err("Please remove the hotkey=enable module "
3819 "parameter, it is deprecated. "
3820 "Hotkeys are always enabled.\n");
3821 }
3822
hotkey_write(char * buf)3823 static int hotkey_write(char *buf)
3824 {
3825 int res;
3826 u32 mask;
3827 char *cmd;
3828
3829 if (!tp_features.hotkey)
3830 return -ENODEV;
3831
3832 if (mutex_lock_killable(&hotkey_mutex))
3833 return -ERESTARTSYS;
3834
3835 mask = hotkey_user_mask;
3836
3837 res = 0;
3838 while ((cmd = next_cmd(&buf))) {
3839 if (strlencmp(cmd, "enable") == 0) {
3840 hotkey_enabledisable_warn(1);
3841 } else if (strlencmp(cmd, "disable") == 0) {
3842 hotkey_enabledisable_warn(0);
3843 res = -EPERM;
3844 } else if (strlencmp(cmd, "reset") == 0) {
3845 mask = (hotkey_all_mask | hotkey_source_mask)
3846 & ~hotkey_reserved_mask;
3847 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3848 /* mask set */
3849 } else if (sscanf(cmd, "%x", &mask) == 1) {
3850 /* mask set */
3851 } else {
3852 res = -EINVAL;
3853 goto errexit;
3854 }
3855 }
3856
3857 if (!res) {
3858 tpacpi_disclose_usertask("procfs hotkey",
3859 "set mask to 0x%08x\n", mask);
3860 res = hotkey_user_mask_set(mask);
3861 }
3862
3863 errexit:
3864 mutex_unlock(&hotkey_mutex);
3865 return res;
3866 }
3867
3868 static const struct acpi_device_id ibm_htk_device_ids[] = {
3869 {TPACPI_ACPI_IBM_HKEY_HID, 0},
3870 {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
3871 {"", 0},
3872 };
3873
3874 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3875 .hid = ibm_htk_device_ids,
3876 .notify = hotkey_notify,
3877 .handle = &hkey_handle,
3878 .type = ACPI_DEVICE_NOTIFY,
3879 };
3880
3881 static struct ibm_struct hotkey_driver_data = {
3882 .name = "hotkey",
3883 .read = hotkey_read,
3884 .write = hotkey_write,
3885 .exit = hotkey_exit,
3886 .resume = hotkey_resume,
3887 .suspend = hotkey_suspend,
3888 .acpi = &ibm_hotkey_acpidriver,
3889 };
3890
3891 /*************************************************************************
3892 * Bluetooth subdriver
3893 */
3894
3895 enum {
3896 /* ACPI GBDC/SBDC bits */
3897 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3898 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3899 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3900 0 = disable, 1 = enable */
3901 };
3902
3903 enum {
3904 /* ACPI \BLTH commands */
3905 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3906 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3907 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3908 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3909 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3910 };
3911
3912 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3913
bluetooth_get_status(void)3914 static int bluetooth_get_status(void)
3915 {
3916 int status;
3917
3918 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3919 if (dbg_bluetoothemul)
3920 return (tpacpi_bluetooth_emulstate) ?
3921 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3922 #endif
3923
3924 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3925 return -EIO;
3926
3927 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3928 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3929 }
3930
bluetooth_set_status(enum tpacpi_rfkill_state state)3931 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3932 {
3933 int status;
3934
3935 vdbg_printk(TPACPI_DBG_RFKILL,
3936 "will attempt to %s bluetooth\n",
3937 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3938
3939 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3940 if (dbg_bluetoothemul) {
3941 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3942 return 0;
3943 }
3944 #endif
3945
3946 if (state == TPACPI_RFK_RADIO_ON)
3947 status = TP_ACPI_BLUETOOTH_RADIOSSW
3948 | TP_ACPI_BLUETOOTH_RESUMECTRL;
3949 else
3950 status = 0;
3951
3952 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3953 return -EIO;
3954
3955 return 0;
3956 }
3957
3958 /* sysfs bluetooth enable ---------------------------------------------- */
bluetooth_enable_show(struct device * dev,struct device_attribute * attr,char * buf)3959 static ssize_t bluetooth_enable_show(struct device *dev,
3960 struct device_attribute *attr,
3961 char *buf)
3962 {
3963 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3964 attr, buf);
3965 }
3966
bluetooth_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)3967 static ssize_t bluetooth_enable_store(struct device *dev,
3968 struct device_attribute *attr,
3969 const char *buf, size_t count)
3970 {
3971 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3972 attr, buf, count);
3973 }
3974
3975 static struct device_attribute dev_attr_bluetooth_enable =
3976 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3977 bluetooth_enable_show, bluetooth_enable_store);
3978
3979 /* --------------------------------------------------------------------- */
3980
3981 static struct attribute *bluetooth_attributes[] = {
3982 &dev_attr_bluetooth_enable.attr,
3983 NULL
3984 };
3985
3986 static const struct attribute_group bluetooth_attr_group = {
3987 .attrs = bluetooth_attributes,
3988 };
3989
3990 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3991 .get_status = bluetooth_get_status,
3992 .set_status = bluetooth_set_status,
3993 };
3994
bluetooth_shutdown(void)3995 static void bluetooth_shutdown(void)
3996 {
3997 /* Order firmware to save current state to NVRAM */
3998 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3999 TP_ACPI_BLTH_SAVE_STATE))
4000 pr_notice("failed to save bluetooth state to NVRAM\n");
4001 else
4002 vdbg_printk(TPACPI_DBG_RFKILL,
4003 "bluetooth state saved to NVRAM\n");
4004 }
4005
bluetooth_exit(void)4006 static void bluetooth_exit(void)
4007 {
4008 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4009 &bluetooth_attr_group);
4010
4011 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4012
4013 bluetooth_shutdown();
4014 }
4015
bluetooth_init(struct ibm_init_struct * iibm)4016 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4017 {
4018 int res;
4019 int status = 0;
4020
4021 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4022 "initializing bluetooth subdriver\n");
4023
4024 TPACPI_ACPIHANDLE_INIT(hkey);
4025
4026 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4027 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4028 tp_features.bluetooth = hkey_handle &&
4029 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4030
4031 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4032 "bluetooth is %s, status 0x%02x\n",
4033 str_supported(tp_features.bluetooth),
4034 status);
4035
4036 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4037 if (dbg_bluetoothemul) {
4038 tp_features.bluetooth = 1;
4039 pr_info("bluetooth switch emulation enabled\n");
4040 } else
4041 #endif
4042 if (tp_features.bluetooth &&
4043 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4044 /* no bluetooth hardware present in system */
4045 tp_features.bluetooth = 0;
4046 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4047 "bluetooth hardware not installed\n");
4048 }
4049
4050 if (!tp_features.bluetooth)
4051 return 1;
4052
4053 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4054 &bluetooth_tprfk_ops,
4055 RFKILL_TYPE_BLUETOOTH,
4056 TPACPI_RFK_BLUETOOTH_SW_NAME,
4057 true);
4058 if (res)
4059 return res;
4060
4061 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4062 &bluetooth_attr_group);
4063 if (res) {
4064 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4065 return res;
4066 }
4067
4068 return 0;
4069 }
4070
4071 /* procfs -------------------------------------------------------------- */
bluetooth_read(struct seq_file * m)4072 static int bluetooth_read(struct seq_file *m)
4073 {
4074 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4075 }
4076
bluetooth_write(char * buf)4077 static int bluetooth_write(char *buf)
4078 {
4079 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4080 }
4081
4082 static struct ibm_struct bluetooth_driver_data = {
4083 .name = "bluetooth",
4084 .read = bluetooth_read,
4085 .write = bluetooth_write,
4086 .exit = bluetooth_exit,
4087 .shutdown = bluetooth_shutdown,
4088 };
4089
4090 /*************************************************************************
4091 * Wan subdriver
4092 */
4093
4094 enum {
4095 /* ACPI GWAN/SWAN bits */
4096 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4097 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4098 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4099 0 = disable, 1 = enable */
4100 };
4101
4102 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4103
wan_get_status(void)4104 static int wan_get_status(void)
4105 {
4106 int status;
4107
4108 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4109 if (dbg_wwanemul)
4110 return (tpacpi_wwan_emulstate) ?
4111 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4112 #endif
4113
4114 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4115 return -EIO;
4116
4117 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4118 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4119 }
4120
wan_set_status(enum tpacpi_rfkill_state state)4121 static int wan_set_status(enum tpacpi_rfkill_state state)
4122 {
4123 int status;
4124
4125 vdbg_printk(TPACPI_DBG_RFKILL,
4126 "will attempt to %s wwan\n",
4127 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4128
4129 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4130 if (dbg_wwanemul) {
4131 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4132 return 0;
4133 }
4134 #endif
4135
4136 if (state == TPACPI_RFK_RADIO_ON)
4137 status = TP_ACPI_WANCARD_RADIOSSW
4138 | TP_ACPI_WANCARD_RESUMECTRL;
4139 else
4140 status = 0;
4141
4142 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4143 return -EIO;
4144
4145 return 0;
4146 }
4147
4148 /* sysfs wan enable ---------------------------------------------------- */
wan_enable_show(struct device * dev,struct device_attribute * attr,char * buf)4149 static ssize_t wan_enable_show(struct device *dev,
4150 struct device_attribute *attr,
4151 char *buf)
4152 {
4153 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4154 attr, buf);
4155 }
4156
wan_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)4157 static ssize_t wan_enable_store(struct device *dev,
4158 struct device_attribute *attr,
4159 const char *buf, size_t count)
4160 {
4161 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4162 attr, buf, count);
4163 }
4164
4165 static struct device_attribute dev_attr_wan_enable =
4166 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4167 wan_enable_show, wan_enable_store);
4168
4169 /* --------------------------------------------------------------------- */
4170
4171 static struct attribute *wan_attributes[] = {
4172 &dev_attr_wan_enable.attr,
4173 NULL
4174 };
4175
4176 static const struct attribute_group wan_attr_group = {
4177 .attrs = wan_attributes,
4178 };
4179
4180 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4181 .get_status = wan_get_status,
4182 .set_status = wan_set_status,
4183 };
4184
wan_shutdown(void)4185 static void wan_shutdown(void)
4186 {
4187 /* Order firmware to save current state to NVRAM */
4188 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4189 TP_ACPI_WGSV_SAVE_STATE))
4190 pr_notice("failed to save WWAN state to NVRAM\n");
4191 else
4192 vdbg_printk(TPACPI_DBG_RFKILL,
4193 "WWAN state saved to NVRAM\n");
4194 }
4195
wan_exit(void)4196 static void wan_exit(void)
4197 {
4198 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4199 &wan_attr_group);
4200
4201 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4202
4203 wan_shutdown();
4204 }
4205
wan_init(struct ibm_init_struct * iibm)4206 static int __init wan_init(struct ibm_init_struct *iibm)
4207 {
4208 int res;
4209 int status = 0;
4210
4211 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4212 "initializing wan subdriver\n");
4213
4214 TPACPI_ACPIHANDLE_INIT(hkey);
4215
4216 tp_features.wan = hkey_handle &&
4217 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4218
4219 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4220 "wan is %s, status 0x%02x\n",
4221 str_supported(tp_features.wan),
4222 status);
4223
4224 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4225 if (dbg_wwanemul) {
4226 tp_features.wan = 1;
4227 pr_info("wwan switch emulation enabled\n");
4228 } else
4229 #endif
4230 if (tp_features.wan &&
4231 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4232 /* no wan hardware present in system */
4233 tp_features.wan = 0;
4234 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4235 "wan hardware not installed\n");
4236 }
4237
4238 if (!tp_features.wan)
4239 return 1;
4240
4241 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4242 &wan_tprfk_ops,
4243 RFKILL_TYPE_WWAN,
4244 TPACPI_RFK_WWAN_SW_NAME,
4245 true);
4246 if (res)
4247 return res;
4248
4249 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4250 &wan_attr_group);
4251
4252 if (res) {
4253 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4254 return res;
4255 }
4256
4257 return 0;
4258 }
4259
4260 /* procfs -------------------------------------------------------------- */
wan_read(struct seq_file * m)4261 static int wan_read(struct seq_file *m)
4262 {
4263 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4264 }
4265
wan_write(char * buf)4266 static int wan_write(char *buf)
4267 {
4268 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4269 }
4270
4271 static struct ibm_struct wan_driver_data = {
4272 .name = "wan",
4273 .read = wan_read,
4274 .write = wan_write,
4275 .exit = wan_exit,
4276 .shutdown = wan_shutdown,
4277 };
4278
4279 /*************************************************************************
4280 * UWB subdriver
4281 */
4282
4283 enum {
4284 /* ACPI GUWB/SUWB bits */
4285 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4286 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4287 };
4288
4289 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4290
uwb_get_status(void)4291 static int uwb_get_status(void)
4292 {
4293 int status;
4294
4295 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4296 if (dbg_uwbemul)
4297 return (tpacpi_uwb_emulstate) ?
4298 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4299 #endif
4300
4301 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4302 return -EIO;
4303
4304 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4305 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4306 }
4307
uwb_set_status(enum tpacpi_rfkill_state state)4308 static int uwb_set_status(enum tpacpi_rfkill_state state)
4309 {
4310 int status;
4311
4312 vdbg_printk(TPACPI_DBG_RFKILL,
4313 "will attempt to %s UWB\n",
4314 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4315
4316 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4317 if (dbg_uwbemul) {
4318 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4319 return 0;
4320 }
4321 #endif
4322
4323 if (state == TPACPI_RFK_RADIO_ON)
4324 status = TP_ACPI_UWB_RADIOSSW;
4325 else
4326 status = 0;
4327
4328 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4329 return -EIO;
4330
4331 return 0;
4332 }
4333
4334 /* --------------------------------------------------------------------- */
4335
4336 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4337 .get_status = uwb_get_status,
4338 .set_status = uwb_set_status,
4339 };
4340
uwb_exit(void)4341 static void uwb_exit(void)
4342 {
4343 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4344 }
4345
uwb_init(struct ibm_init_struct * iibm)4346 static int __init uwb_init(struct ibm_init_struct *iibm)
4347 {
4348 int res;
4349 int status = 0;
4350
4351 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4352 "initializing uwb subdriver\n");
4353
4354 TPACPI_ACPIHANDLE_INIT(hkey);
4355
4356 tp_features.uwb = hkey_handle &&
4357 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4358
4359 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4360 "uwb is %s, status 0x%02x\n",
4361 str_supported(tp_features.uwb),
4362 status);
4363
4364 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4365 if (dbg_uwbemul) {
4366 tp_features.uwb = 1;
4367 pr_info("uwb switch emulation enabled\n");
4368 } else
4369 #endif
4370 if (tp_features.uwb &&
4371 !(status & TP_ACPI_UWB_HWPRESENT)) {
4372 /* no uwb hardware present in system */
4373 tp_features.uwb = 0;
4374 dbg_printk(TPACPI_DBG_INIT,
4375 "uwb hardware not installed\n");
4376 }
4377
4378 if (!tp_features.uwb)
4379 return 1;
4380
4381 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4382 &uwb_tprfk_ops,
4383 RFKILL_TYPE_UWB,
4384 TPACPI_RFK_UWB_SW_NAME,
4385 false);
4386 return res;
4387 }
4388
4389 static struct ibm_struct uwb_driver_data = {
4390 .name = "uwb",
4391 .exit = uwb_exit,
4392 .flags.experimental = 1,
4393 };
4394
4395 /*************************************************************************
4396 * Video subdriver
4397 */
4398
4399 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4400
4401 enum video_access_mode {
4402 TPACPI_VIDEO_NONE = 0,
4403 TPACPI_VIDEO_570, /* 570 */
4404 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4405 TPACPI_VIDEO_NEW, /* all others */
4406 };
4407
4408 enum { /* video status flags, based on VIDEO_570 */
4409 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4410 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4411 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4412 };
4413
4414 enum { /* TPACPI_VIDEO_570 constants */
4415 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4416 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4417 * video_status_flags */
4418 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4419 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4420 };
4421
4422 static enum video_access_mode video_supported;
4423 static int video_orig_autosw;
4424
4425 static int video_autosw_get(void);
4426 static int video_autosw_set(int enable);
4427
4428 TPACPI_HANDLE(vid, root,
4429 "\\_SB.PCI.AGP.VGA", /* 570 */
4430 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
4431 "\\_SB.PCI0.VID0", /* 770e */
4432 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
4433 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */
4434 "\\_SB.PCI0.AGP.VID", /* all others */
4435 ); /* R30, R31 */
4436
4437 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4438
video_init(struct ibm_init_struct * iibm)4439 static int __init video_init(struct ibm_init_struct *iibm)
4440 {
4441 int ivga;
4442
4443 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4444
4445 TPACPI_ACPIHANDLE_INIT(vid);
4446 if (tpacpi_is_ibm())
4447 TPACPI_ACPIHANDLE_INIT(vid2);
4448
4449 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4450 /* G41, assume IVGA doesn't change */
4451 vid_handle = vid2_handle;
4452
4453 if (!vid_handle)
4454 /* video switching not supported on R30, R31 */
4455 video_supported = TPACPI_VIDEO_NONE;
4456 else if (tpacpi_is_ibm() &&
4457 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4458 /* 570 */
4459 video_supported = TPACPI_VIDEO_570;
4460 else if (tpacpi_is_ibm() &&
4461 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4462 /* 600e/x, 770e, 770x */
4463 video_supported = TPACPI_VIDEO_770;
4464 else
4465 /* all others */
4466 video_supported = TPACPI_VIDEO_NEW;
4467
4468 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4469 str_supported(video_supported != TPACPI_VIDEO_NONE),
4470 video_supported);
4471
4472 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4473 }
4474
video_exit(void)4475 static void video_exit(void)
4476 {
4477 dbg_printk(TPACPI_DBG_EXIT,
4478 "restoring original video autoswitch mode\n");
4479 if (video_autosw_set(video_orig_autosw))
4480 pr_err("error while trying to restore original "
4481 "video autoswitch mode\n");
4482 }
4483
video_outputsw_get(void)4484 static int video_outputsw_get(void)
4485 {
4486 int status = 0;
4487 int i;
4488
4489 switch (video_supported) {
4490 case TPACPI_VIDEO_570:
4491 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4492 TP_ACPI_VIDEO_570_PHSCMD))
4493 return -EIO;
4494 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4495 break;
4496 case TPACPI_VIDEO_770:
4497 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4498 return -EIO;
4499 if (i)
4500 status |= TP_ACPI_VIDEO_S_LCD;
4501 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4502 return -EIO;
4503 if (i)
4504 status |= TP_ACPI_VIDEO_S_CRT;
4505 break;
4506 case TPACPI_VIDEO_NEW:
4507 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4508 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4509 return -EIO;
4510 if (i)
4511 status |= TP_ACPI_VIDEO_S_CRT;
4512
4513 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4514 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4515 return -EIO;
4516 if (i)
4517 status |= TP_ACPI_VIDEO_S_LCD;
4518 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4519 return -EIO;
4520 if (i)
4521 status |= TP_ACPI_VIDEO_S_DVI;
4522 break;
4523 default:
4524 return -ENOSYS;
4525 }
4526
4527 return status;
4528 }
4529
video_outputsw_set(int status)4530 static int video_outputsw_set(int status)
4531 {
4532 int autosw;
4533 int res = 0;
4534
4535 switch (video_supported) {
4536 case TPACPI_VIDEO_570:
4537 res = acpi_evalf(NULL, NULL,
4538 "\\_SB.PHS2", "vdd",
4539 TP_ACPI_VIDEO_570_PHS2CMD,
4540 status | TP_ACPI_VIDEO_570_PHS2SET);
4541 break;
4542 case TPACPI_VIDEO_770:
4543 autosw = video_autosw_get();
4544 if (autosw < 0)
4545 return autosw;
4546
4547 res = video_autosw_set(1);
4548 if (res)
4549 return res;
4550 res = acpi_evalf(vid_handle, NULL,
4551 "ASWT", "vdd", status * 0x100, 0);
4552 if (!autosw && video_autosw_set(autosw)) {
4553 pr_err("video auto-switch left enabled due to error\n");
4554 return -EIO;
4555 }
4556 break;
4557 case TPACPI_VIDEO_NEW:
4558 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4559 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4560 break;
4561 default:
4562 return -ENOSYS;
4563 }
4564
4565 return (res)? 0 : -EIO;
4566 }
4567
video_autosw_get(void)4568 static int video_autosw_get(void)
4569 {
4570 int autosw = 0;
4571
4572 switch (video_supported) {
4573 case TPACPI_VIDEO_570:
4574 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4575 return -EIO;
4576 break;
4577 case TPACPI_VIDEO_770:
4578 case TPACPI_VIDEO_NEW:
4579 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4580 return -EIO;
4581 break;
4582 default:
4583 return -ENOSYS;
4584 }
4585
4586 return autosw & 1;
4587 }
4588
video_autosw_set(int enable)4589 static int video_autosw_set(int enable)
4590 {
4591 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4592 return -EIO;
4593 return 0;
4594 }
4595
video_outputsw_cycle(void)4596 static int video_outputsw_cycle(void)
4597 {
4598 int autosw = video_autosw_get();
4599 int res;
4600
4601 if (autosw < 0)
4602 return autosw;
4603
4604 switch (video_supported) {
4605 case TPACPI_VIDEO_570:
4606 res = video_autosw_set(1);
4607 if (res)
4608 return res;
4609 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4610 break;
4611 case TPACPI_VIDEO_770:
4612 case TPACPI_VIDEO_NEW:
4613 res = video_autosw_set(1);
4614 if (res)
4615 return res;
4616 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4617 break;
4618 default:
4619 return -ENOSYS;
4620 }
4621 if (!autosw && video_autosw_set(autosw)) {
4622 pr_err("video auto-switch left enabled due to error\n");
4623 return -EIO;
4624 }
4625
4626 return (res)? 0 : -EIO;
4627 }
4628
video_expand_toggle(void)4629 static int video_expand_toggle(void)
4630 {
4631 switch (video_supported) {
4632 case TPACPI_VIDEO_570:
4633 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4634 0 : -EIO;
4635 case TPACPI_VIDEO_770:
4636 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4637 0 : -EIO;
4638 case TPACPI_VIDEO_NEW:
4639 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4640 0 : -EIO;
4641 default:
4642 return -ENOSYS;
4643 }
4644 /* not reached */
4645 }
4646
video_read(struct seq_file * m)4647 static int video_read(struct seq_file *m)
4648 {
4649 int status, autosw;
4650
4651 if (video_supported == TPACPI_VIDEO_NONE) {
4652 seq_printf(m, "status:\t\tnot supported\n");
4653 return 0;
4654 }
4655
4656 /* Even reads can crash X.org, so... */
4657 if (!capable(CAP_SYS_ADMIN))
4658 return -EPERM;
4659
4660 status = video_outputsw_get();
4661 if (status < 0)
4662 return status;
4663
4664 autosw = video_autosw_get();
4665 if (autosw < 0)
4666 return autosw;
4667
4668 seq_printf(m, "status:\t\tsupported\n");
4669 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4670 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4671 if (video_supported == TPACPI_VIDEO_NEW)
4672 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4673 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4674 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4675 seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4676 if (video_supported == TPACPI_VIDEO_NEW)
4677 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4678 seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4679 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4680
4681 return 0;
4682 }
4683
video_write(char * buf)4684 static int video_write(char *buf)
4685 {
4686 char *cmd;
4687 int enable, disable, status;
4688 int res;
4689
4690 if (video_supported == TPACPI_VIDEO_NONE)
4691 return -ENODEV;
4692
4693 /* Even reads can crash X.org, let alone writes... */
4694 if (!capable(CAP_SYS_ADMIN))
4695 return -EPERM;
4696
4697 enable = 0;
4698 disable = 0;
4699
4700 while ((cmd = next_cmd(&buf))) {
4701 if (strlencmp(cmd, "lcd_enable") == 0) {
4702 enable |= TP_ACPI_VIDEO_S_LCD;
4703 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4704 disable |= TP_ACPI_VIDEO_S_LCD;
4705 } else if (strlencmp(cmd, "crt_enable") == 0) {
4706 enable |= TP_ACPI_VIDEO_S_CRT;
4707 } else if (strlencmp(cmd, "crt_disable") == 0) {
4708 disable |= TP_ACPI_VIDEO_S_CRT;
4709 } else if (video_supported == TPACPI_VIDEO_NEW &&
4710 strlencmp(cmd, "dvi_enable") == 0) {
4711 enable |= TP_ACPI_VIDEO_S_DVI;
4712 } else if (video_supported == TPACPI_VIDEO_NEW &&
4713 strlencmp(cmd, "dvi_disable") == 0) {
4714 disable |= TP_ACPI_VIDEO_S_DVI;
4715 } else if (strlencmp(cmd, "auto_enable") == 0) {
4716 res = video_autosw_set(1);
4717 if (res)
4718 return res;
4719 } else if (strlencmp(cmd, "auto_disable") == 0) {
4720 res = video_autosw_set(0);
4721 if (res)
4722 return res;
4723 } else if (strlencmp(cmd, "video_switch") == 0) {
4724 res = video_outputsw_cycle();
4725 if (res)
4726 return res;
4727 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4728 res = video_expand_toggle();
4729 if (res)
4730 return res;
4731 } else
4732 return -EINVAL;
4733 }
4734
4735 if (enable || disable) {
4736 status = video_outputsw_get();
4737 if (status < 0)
4738 return status;
4739 res = video_outputsw_set((status & ~disable) | enable);
4740 if (res)
4741 return res;
4742 }
4743
4744 return 0;
4745 }
4746
4747 static struct ibm_struct video_driver_data = {
4748 .name = "video",
4749 .read = video_read,
4750 .write = video_write,
4751 .exit = video_exit,
4752 };
4753
4754 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4755
4756 /*************************************************************************
4757 * Light (thinklight) subdriver
4758 */
4759
4760 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4761 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4762
light_get_status(void)4763 static int light_get_status(void)
4764 {
4765 int status = 0;
4766
4767 if (tp_features.light_status) {
4768 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4769 return -EIO;
4770 return (!!status);
4771 }
4772
4773 return -ENXIO;
4774 }
4775
light_set_status(int status)4776 static int light_set_status(int status)
4777 {
4778 int rc;
4779
4780 if (tp_features.light) {
4781 if (cmos_handle) {
4782 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4783 (status)?
4784 TP_CMOS_THINKLIGHT_ON :
4785 TP_CMOS_THINKLIGHT_OFF);
4786 } else {
4787 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4788 (status)? 1 : 0);
4789 }
4790 return (rc)? 0 : -EIO;
4791 }
4792
4793 return -ENXIO;
4794 }
4795
light_set_status_worker(struct work_struct * work)4796 static void light_set_status_worker(struct work_struct *work)
4797 {
4798 struct tpacpi_led_classdev *data =
4799 container_of(work, struct tpacpi_led_classdev, work);
4800
4801 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4802 light_set_status((data->new_state != TPACPI_LED_OFF));
4803 }
4804
light_sysfs_set(struct led_classdev * led_cdev,enum led_brightness brightness)4805 static void light_sysfs_set(struct led_classdev *led_cdev,
4806 enum led_brightness brightness)
4807 {
4808 struct tpacpi_led_classdev *data =
4809 container_of(led_cdev,
4810 struct tpacpi_led_classdev,
4811 led_classdev);
4812 data->new_state = (brightness != LED_OFF) ?
4813 TPACPI_LED_ON : TPACPI_LED_OFF;
4814 queue_work(tpacpi_wq, &data->work);
4815 }
4816
light_sysfs_get(struct led_classdev * led_cdev)4817 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4818 {
4819 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4820 }
4821
4822 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4823 .led_classdev = {
4824 .name = "tpacpi::thinklight",
4825 .brightness_set = &light_sysfs_set,
4826 .brightness_get = &light_sysfs_get,
4827 }
4828 };
4829
light_init(struct ibm_init_struct * iibm)4830 static int __init light_init(struct ibm_init_struct *iibm)
4831 {
4832 int rc;
4833
4834 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4835
4836 if (tpacpi_is_ibm()) {
4837 TPACPI_ACPIHANDLE_INIT(ledb);
4838 TPACPI_ACPIHANDLE_INIT(lght);
4839 }
4840 TPACPI_ACPIHANDLE_INIT(cmos);
4841 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4842
4843 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4844 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4845
4846 if (tp_features.light)
4847 /* light status not supported on
4848 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4849 tp_features.light_status =
4850 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4851
4852 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4853 str_supported(tp_features.light),
4854 str_supported(tp_features.light_status));
4855
4856 if (!tp_features.light)
4857 return 1;
4858
4859 rc = led_classdev_register(&tpacpi_pdev->dev,
4860 &tpacpi_led_thinklight.led_classdev);
4861
4862 if (rc < 0) {
4863 tp_features.light = 0;
4864 tp_features.light_status = 0;
4865 } else {
4866 rc = 0;
4867 }
4868
4869 return rc;
4870 }
4871
light_exit(void)4872 static void light_exit(void)
4873 {
4874 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4875 flush_workqueue(tpacpi_wq);
4876 }
4877
light_read(struct seq_file * m)4878 static int light_read(struct seq_file *m)
4879 {
4880 int status;
4881
4882 if (!tp_features.light) {
4883 seq_printf(m, "status:\t\tnot supported\n");
4884 } else if (!tp_features.light_status) {
4885 seq_printf(m, "status:\t\tunknown\n");
4886 seq_printf(m, "commands:\ton, off\n");
4887 } else {
4888 status = light_get_status();
4889 if (status < 0)
4890 return status;
4891 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4892 seq_printf(m, "commands:\ton, off\n");
4893 }
4894
4895 return 0;
4896 }
4897
light_write(char * buf)4898 static int light_write(char *buf)
4899 {
4900 char *cmd;
4901 int newstatus = 0;
4902
4903 if (!tp_features.light)
4904 return -ENODEV;
4905
4906 while ((cmd = next_cmd(&buf))) {
4907 if (strlencmp(cmd, "on") == 0) {
4908 newstatus = 1;
4909 } else if (strlencmp(cmd, "off") == 0) {
4910 newstatus = 0;
4911 } else
4912 return -EINVAL;
4913 }
4914
4915 return light_set_status(newstatus);
4916 }
4917
4918 static struct ibm_struct light_driver_data = {
4919 .name = "light",
4920 .read = light_read,
4921 .write = light_write,
4922 .exit = light_exit,
4923 };
4924
4925 /*************************************************************************
4926 * CMOS subdriver
4927 */
4928
4929 /* sysfs cmos_command -------------------------------------------------- */
cmos_command_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)4930 static ssize_t cmos_command_store(struct device *dev,
4931 struct device_attribute *attr,
4932 const char *buf, size_t count)
4933 {
4934 unsigned long cmos_cmd;
4935 int res;
4936
4937 if (parse_strtoul(buf, 21, &cmos_cmd))
4938 return -EINVAL;
4939
4940 res = issue_thinkpad_cmos_command(cmos_cmd);
4941 return (res)? res : count;
4942 }
4943
4944 static struct device_attribute dev_attr_cmos_command =
4945 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4946
4947 /* --------------------------------------------------------------------- */
4948
cmos_init(struct ibm_init_struct * iibm)4949 static int __init cmos_init(struct ibm_init_struct *iibm)
4950 {
4951 int res;
4952
4953 vdbg_printk(TPACPI_DBG_INIT,
4954 "initializing cmos commands subdriver\n");
4955
4956 TPACPI_ACPIHANDLE_INIT(cmos);
4957
4958 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4959 str_supported(cmos_handle != NULL));
4960
4961 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4962 if (res)
4963 return res;
4964
4965 return (cmos_handle)? 0 : 1;
4966 }
4967
cmos_exit(void)4968 static void cmos_exit(void)
4969 {
4970 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4971 }
4972
cmos_read(struct seq_file * m)4973 static int cmos_read(struct seq_file *m)
4974 {
4975 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4976 R30, R31, T20-22, X20-21 */
4977 if (!cmos_handle)
4978 seq_printf(m, "status:\t\tnot supported\n");
4979 else {
4980 seq_printf(m, "status:\t\tsupported\n");
4981 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4982 }
4983
4984 return 0;
4985 }
4986
cmos_write(char * buf)4987 static int cmos_write(char *buf)
4988 {
4989 char *cmd;
4990 int cmos_cmd, res;
4991
4992 while ((cmd = next_cmd(&buf))) {
4993 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4994 cmos_cmd >= 0 && cmos_cmd <= 21) {
4995 /* cmos_cmd set */
4996 } else
4997 return -EINVAL;
4998
4999 res = issue_thinkpad_cmos_command(cmos_cmd);
5000 if (res)
5001 return res;
5002 }
5003
5004 return 0;
5005 }
5006
5007 static struct ibm_struct cmos_driver_data = {
5008 .name = "cmos",
5009 .read = cmos_read,
5010 .write = cmos_write,
5011 .exit = cmos_exit,
5012 };
5013
5014 /*************************************************************************
5015 * LED subdriver
5016 */
5017
5018 enum led_access_mode {
5019 TPACPI_LED_NONE = 0,
5020 TPACPI_LED_570, /* 570 */
5021 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5022 TPACPI_LED_NEW, /* all others */
5023 };
5024
5025 enum { /* For TPACPI_LED_OLD */
5026 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
5027 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
5028 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
5029 };
5030
5031 static enum led_access_mode led_supported;
5032
5033 static acpi_handle led_handle;
5034
5035 #define TPACPI_LED_NUMLEDS 16
5036 static struct tpacpi_led_classdev *tpacpi_leds;
5037 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5038 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5039 /* there's a limit of 19 chars + NULL before 2.6.26 */
5040 "tpacpi::power",
5041 "tpacpi:orange:batt",
5042 "tpacpi:green:batt",
5043 "tpacpi::dock_active",
5044 "tpacpi::bay_active",
5045 "tpacpi::dock_batt",
5046 "tpacpi::unknown_led",
5047 "tpacpi::standby",
5048 "tpacpi::dock_status1",
5049 "tpacpi::dock_status2",
5050 "tpacpi::unknown_led2",
5051 "tpacpi::unknown_led3",
5052 "tpacpi::thinkvantage",
5053 };
5054 #define TPACPI_SAFE_LEDS 0x1081U
5055
tpacpi_is_led_restricted(const unsigned int led)5056 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5057 {
5058 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5059 return false;
5060 #else
5061 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5062 #endif
5063 }
5064
led_get_status(const unsigned int led)5065 static int led_get_status(const unsigned int led)
5066 {
5067 int status;
5068 enum led_status_t led_s;
5069
5070 switch (led_supported) {
5071 case TPACPI_LED_570:
5072 if (!acpi_evalf(ec_handle,
5073 &status, "GLED", "dd", 1 << led))
5074 return -EIO;
5075 led_s = (status == 0)?
5076 TPACPI_LED_OFF :
5077 ((status == 1)?
5078 TPACPI_LED_ON :
5079 TPACPI_LED_BLINK);
5080 tpacpi_led_state_cache[led] = led_s;
5081 return led_s;
5082 default:
5083 return -ENXIO;
5084 }
5085
5086 /* not reached */
5087 }
5088
led_set_status(const unsigned int led,const enum led_status_t ledstatus)5089 static int led_set_status(const unsigned int led,
5090 const enum led_status_t ledstatus)
5091 {
5092 /* off, on, blink. Index is led_status_t */
5093 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5094 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5095
5096 int rc = 0;
5097
5098 switch (led_supported) {
5099 case TPACPI_LED_570:
5100 /* 570 */
5101 if (unlikely(led > 7))
5102 return -EINVAL;
5103 if (unlikely(tpacpi_is_led_restricted(led)))
5104 return -EPERM;
5105 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5106 (1 << led), led_sled_arg1[ledstatus]))
5107 rc = -EIO;
5108 break;
5109 case TPACPI_LED_OLD:
5110 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5111 if (unlikely(led > 7))
5112 return -EINVAL;
5113 if (unlikely(tpacpi_is_led_restricted(led)))
5114 return -EPERM;
5115 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5116 if (rc >= 0)
5117 rc = ec_write(TPACPI_LED_EC_HLBL,
5118 (ledstatus == TPACPI_LED_BLINK) << led);
5119 if (rc >= 0)
5120 rc = ec_write(TPACPI_LED_EC_HLCL,
5121 (ledstatus != TPACPI_LED_OFF) << led);
5122 break;
5123 case TPACPI_LED_NEW:
5124 /* all others */
5125 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5126 return -EINVAL;
5127 if (unlikely(tpacpi_is_led_restricted(led)))
5128 return -EPERM;
5129 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5130 led, led_led_arg1[ledstatus]))
5131 rc = -EIO;
5132 break;
5133 default:
5134 rc = -ENXIO;
5135 }
5136
5137 if (!rc)
5138 tpacpi_led_state_cache[led] = ledstatus;
5139
5140 return rc;
5141 }
5142
led_set_status_worker(struct work_struct * work)5143 static void led_set_status_worker(struct work_struct *work)
5144 {
5145 struct tpacpi_led_classdev *data =
5146 container_of(work, struct tpacpi_led_classdev, work);
5147
5148 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5149 led_set_status(data->led, data->new_state);
5150 }
5151
led_sysfs_set(struct led_classdev * led_cdev,enum led_brightness brightness)5152 static void led_sysfs_set(struct led_classdev *led_cdev,
5153 enum led_brightness brightness)
5154 {
5155 struct tpacpi_led_classdev *data = container_of(led_cdev,
5156 struct tpacpi_led_classdev, led_classdev);
5157
5158 if (brightness == LED_OFF)
5159 data->new_state = TPACPI_LED_OFF;
5160 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5161 data->new_state = TPACPI_LED_ON;
5162 else
5163 data->new_state = TPACPI_LED_BLINK;
5164
5165 queue_work(tpacpi_wq, &data->work);
5166 }
5167
led_sysfs_blink_set(struct led_classdev * led_cdev,unsigned long * delay_on,unsigned long * delay_off)5168 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5169 unsigned long *delay_on, unsigned long *delay_off)
5170 {
5171 struct tpacpi_led_classdev *data = container_of(led_cdev,
5172 struct tpacpi_led_classdev, led_classdev);
5173
5174 /* Can we choose the flash rate? */
5175 if (*delay_on == 0 && *delay_off == 0) {
5176 /* yes. set them to the hardware blink rate (1 Hz) */
5177 *delay_on = 500; /* ms */
5178 *delay_off = 500; /* ms */
5179 } else if ((*delay_on != 500) || (*delay_off != 500))
5180 return -EINVAL;
5181
5182 data->new_state = TPACPI_LED_BLINK;
5183 queue_work(tpacpi_wq, &data->work);
5184
5185 return 0;
5186 }
5187
led_sysfs_get(struct led_classdev * led_cdev)5188 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5189 {
5190 int rc;
5191
5192 struct tpacpi_led_classdev *data = container_of(led_cdev,
5193 struct tpacpi_led_classdev, led_classdev);
5194
5195 rc = led_get_status(data->led);
5196
5197 if (rc == TPACPI_LED_OFF || rc < 0)
5198 rc = LED_OFF; /* no error handling in led class :( */
5199 else
5200 rc = LED_FULL;
5201
5202 return rc;
5203 }
5204
led_exit(void)5205 static void led_exit(void)
5206 {
5207 unsigned int i;
5208
5209 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5210 if (tpacpi_leds[i].led_classdev.name)
5211 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5212 }
5213
5214 flush_workqueue(tpacpi_wq);
5215 kfree(tpacpi_leds);
5216 }
5217
tpacpi_init_led(unsigned int led)5218 static int __init tpacpi_init_led(unsigned int led)
5219 {
5220 int rc;
5221
5222 tpacpi_leds[led].led = led;
5223
5224 /* LEDs with no name don't get registered */
5225 if (!tpacpi_led_names[led])
5226 return 0;
5227
5228 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5229 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5230 if (led_supported == TPACPI_LED_570)
5231 tpacpi_leds[led].led_classdev.brightness_get =
5232 &led_sysfs_get;
5233
5234 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5235
5236 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5237
5238 rc = led_classdev_register(&tpacpi_pdev->dev,
5239 &tpacpi_leds[led].led_classdev);
5240 if (rc < 0)
5241 tpacpi_leds[led].led_classdev.name = NULL;
5242
5243 return rc;
5244 }
5245
5246 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5247 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5248 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5249 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5250
5251 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5252 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5253 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5254 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5255 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5256 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5257 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5258 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5259
5260 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5261 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5262 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5263 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5264 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5265
5266 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5267 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5268 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5269 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5270
5271 /* (1) - may have excess leds enabled on MSB */
5272
5273 /* Defaults (order matters, keep last, don't reorder!) */
5274 { /* Lenovo */
5275 .vendor = PCI_VENDOR_ID_LENOVO,
5276 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5277 .quirks = 0x1fffU,
5278 },
5279 { /* IBM ThinkPads with no EC version string */
5280 .vendor = PCI_VENDOR_ID_IBM,
5281 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5282 .quirks = 0x00ffU,
5283 },
5284 { /* IBM ThinkPads with EC version string */
5285 .vendor = PCI_VENDOR_ID_IBM,
5286 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5287 .quirks = 0x00bfU,
5288 },
5289 };
5290
5291 #undef TPACPI_LEDQ_IBM
5292 #undef TPACPI_LEDQ_LNV
5293
led_init_detect_mode(void)5294 static enum led_access_mode __init led_init_detect_mode(void)
5295 {
5296 acpi_status status;
5297
5298 if (tpacpi_is_ibm()) {
5299 /* 570 */
5300 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5301 if (ACPI_SUCCESS(status))
5302 return TPACPI_LED_570;
5303
5304 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5305 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5306 if (ACPI_SUCCESS(status))
5307 return TPACPI_LED_OLD;
5308 }
5309
5310 /* most others */
5311 status = acpi_get_handle(ec_handle, "LED", &led_handle);
5312 if (ACPI_SUCCESS(status))
5313 return TPACPI_LED_NEW;
5314
5315 /* R30, R31, and unknown firmwares */
5316 led_handle = NULL;
5317 return TPACPI_LED_NONE;
5318 }
5319
led_init(struct ibm_init_struct * iibm)5320 static int __init led_init(struct ibm_init_struct *iibm)
5321 {
5322 unsigned int i;
5323 int rc;
5324 unsigned long useful_leds;
5325
5326 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5327
5328 led_supported = led_init_detect_mode();
5329
5330 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5331 str_supported(led_supported), led_supported);
5332
5333 if (led_supported == TPACPI_LED_NONE)
5334 return 1;
5335
5336 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5337 GFP_KERNEL);
5338 if (!tpacpi_leds) {
5339 pr_err("Out of memory for LED data\n");
5340 return -ENOMEM;
5341 }
5342
5343 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5344 ARRAY_SIZE(led_useful_qtable));
5345
5346 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5347 if (!tpacpi_is_led_restricted(i) &&
5348 test_bit(i, &useful_leds)) {
5349 rc = tpacpi_init_led(i);
5350 if (rc < 0) {
5351 led_exit();
5352 return rc;
5353 }
5354 }
5355 }
5356
5357 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5358 pr_notice("warning: userspace override of important "
5359 "firmware LEDs is enabled\n");
5360 #endif
5361 return 0;
5362 }
5363
5364 #define str_led_status(s) \
5365 ((s) == TPACPI_LED_OFF ? "off" : \
5366 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5367
led_read(struct seq_file * m)5368 static int led_read(struct seq_file *m)
5369 {
5370 if (!led_supported) {
5371 seq_printf(m, "status:\t\tnot supported\n");
5372 return 0;
5373 }
5374 seq_printf(m, "status:\t\tsupported\n");
5375
5376 if (led_supported == TPACPI_LED_570) {
5377 /* 570 */
5378 int i, status;
5379 for (i = 0; i < 8; i++) {
5380 status = led_get_status(i);
5381 if (status < 0)
5382 return -EIO;
5383 seq_printf(m, "%d:\t\t%s\n",
5384 i, str_led_status(status));
5385 }
5386 }
5387
5388 seq_printf(m, "commands:\t"
5389 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5390
5391 return 0;
5392 }
5393
led_write(char * buf)5394 static int led_write(char *buf)
5395 {
5396 char *cmd;
5397 int led, rc;
5398 enum led_status_t s;
5399
5400 if (!led_supported)
5401 return -ENODEV;
5402
5403 while ((cmd = next_cmd(&buf))) {
5404 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5405 return -EINVAL;
5406
5407 if (strstr(cmd, "off")) {
5408 s = TPACPI_LED_OFF;
5409 } else if (strstr(cmd, "on")) {
5410 s = TPACPI_LED_ON;
5411 } else if (strstr(cmd, "blink")) {
5412 s = TPACPI_LED_BLINK;
5413 } else {
5414 return -EINVAL;
5415 }
5416
5417 rc = led_set_status(led, s);
5418 if (rc < 0)
5419 return rc;
5420 }
5421
5422 return 0;
5423 }
5424
5425 static struct ibm_struct led_driver_data = {
5426 .name = "led",
5427 .read = led_read,
5428 .write = led_write,
5429 .exit = led_exit,
5430 };
5431
5432 /*************************************************************************
5433 * Beep subdriver
5434 */
5435
5436 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5437
5438 #define TPACPI_BEEP_Q1 0x0001
5439
5440 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5441 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5442 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5443 };
5444
beep_init(struct ibm_init_struct * iibm)5445 static int __init beep_init(struct ibm_init_struct *iibm)
5446 {
5447 unsigned long quirks;
5448
5449 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5450
5451 TPACPI_ACPIHANDLE_INIT(beep);
5452
5453 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5454 str_supported(beep_handle != NULL));
5455
5456 quirks = tpacpi_check_quirks(beep_quirk_table,
5457 ARRAY_SIZE(beep_quirk_table));
5458
5459 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5460
5461 return (beep_handle)? 0 : 1;
5462 }
5463
beep_read(struct seq_file * m)5464 static int beep_read(struct seq_file *m)
5465 {
5466 if (!beep_handle)
5467 seq_printf(m, "status:\t\tnot supported\n");
5468 else {
5469 seq_printf(m, "status:\t\tsupported\n");
5470 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5471 }
5472
5473 return 0;
5474 }
5475
beep_write(char * buf)5476 static int beep_write(char *buf)
5477 {
5478 char *cmd;
5479 int beep_cmd;
5480
5481 if (!beep_handle)
5482 return -ENODEV;
5483
5484 while ((cmd = next_cmd(&buf))) {
5485 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5486 beep_cmd >= 0 && beep_cmd <= 17) {
5487 /* beep_cmd set */
5488 } else
5489 return -EINVAL;
5490 if (tp_features.beep_needs_two_args) {
5491 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5492 beep_cmd, 0))
5493 return -EIO;
5494 } else {
5495 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5496 beep_cmd))
5497 return -EIO;
5498 }
5499 }
5500
5501 return 0;
5502 }
5503
5504 static struct ibm_struct beep_driver_data = {
5505 .name = "beep",
5506 .read = beep_read,
5507 .write = beep_write,
5508 };
5509
5510 /*************************************************************************
5511 * Thermal subdriver
5512 */
5513
5514 enum thermal_access_mode {
5515 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5516 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5517 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5518 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5519 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5520 };
5521
5522 enum { /* TPACPI_THERMAL_TPEC_* */
5523 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5524 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5525 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5526
5527 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5528 };
5529
5530
5531 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5532 struct ibm_thermal_sensors_struct {
5533 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5534 };
5535
5536 static enum thermal_access_mode thermal_read_mode;
5537
5538 /* idx is zero-based */
thermal_get_sensor(int idx,s32 * value)5539 static int thermal_get_sensor(int idx, s32 *value)
5540 {
5541 int t;
5542 s8 tmp;
5543 char tmpi[5];
5544
5545 t = TP_EC_THERMAL_TMP0;
5546
5547 switch (thermal_read_mode) {
5548 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5549 case TPACPI_THERMAL_TPEC_16:
5550 if (idx >= 8 && idx <= 15) {
5551 t = TP_EC_THERMAL_TMP8;
5552 idx -= 8;
5553 }
5554 /* fallthrough */
5555 #endif
5556 case TPACPI_THERMAL_TPEC_8:
5557 if (idx <= 7) {
5558 if (!acpi_ec_read(t + idx, &tmp))
5559 return -EIO;
5560 *value = tmp * 1000;
5561 return 0;
5562 }
5563 break;
5564
5565 case TPACPI_THERMAL_ACPI_UPDT:
5566 if (idx <= 7) {
5567 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5568 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5569 return -EIO;
5570 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5571 return -EIO;
5572 *value = (t - 2732) * 100;
5573 return 0;
5574 }
5575 break;
5576
5577 case TPACPI_THERMAL_ACPI_TMP07:
5578 if (idx <= 7) {
5579 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5580 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5581 return -EIO;
5582 if (t > 127 || t < -127)
5583 t = TP_EC_THERMAL_TMP_NA;
5584 *value = t * 1000;
5585 return 0;
5586 }
5587 break;
5588
5589 case TPACPI_THERMAL_NONE:
5590 default:
5591 return -ENOSYS;
5592 }
5593
5594 return -EINVAL;
5595 }
5596
thermal_get_sensors(struct ibm_thermal_sensors_struct * s)5597 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5598 {
5599 int res, i;
5600 int n;
5601
5602 n = 8;
5603 i = 0;
5604
5605 if (!s)
5606 return -EINVAL;
5607
5608 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5609 n = 16;
5610
5611 for (i = 0 ; i < n; i++) {
5612 res = thermal_get_sensor(i, &s->temp[i]);
5613 if (res)
5614 return res;
5615 }
5616
5617 return n;
5618 }
5619
thermal_dump_all_sensors(void)5620 static void thermal_dump_all_sensors(void)
5621 {
5622 int n, i;
5623 struct ibm_thermal_sensors_struct t;
5624
5625 n = thermal_get_sensors(&t);
5626 if (n <= 0)
5627 return;
5628
5629 pr_notice("temperatures (Celsius):");
5630
5631 for (i = 0; i < n; i++) {
5632 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5633 pr_cont(" %d", (int)(t.temp[i] / 1000));
5634 else
5635 pr_cont(" N/A");
5636 }
5637
5638 pr_cont("\n");
5639 }
5640
5641 /* sysfs temp##_input -------------------------------------------------- */
5642
thermal_temp_input_show(struct device * dev,struct device_attribute * attr,char * buf)5643 static ssize_t thermal_temp_input_show(struct device *dev,
5644 struct device_attribute *attr,
5645 char *buf)
5646 {
5647 struct sensor_device_attribute *sensor_attr =
5648 to_sensor_dev_attr(attr);
5649 int idx = sensor_attr->index;
5650 s32 value;
5651 int res;
5652
5653 res = thermal_get_sensor(idx, &value);
5654 if (res)
5655 return res;
5656 if (value == TPACPI_THERMAL_SENSOR_NA)
5657 return -ENXIO;
5658
5659 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5660 }
5661
5662 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5663 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5664 thermal_temp_input_show, NULL, _idxB)
5665
5666 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5667 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5668 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5669 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5670 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5671 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5672 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5673 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5674 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5675 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5676 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5677 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5678 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5679 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5680 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5681 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5682 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5683 };
5684
5685 #define THERMAL_ATTRS(X) \
5686 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5687
5688 static struct attribute *thermal_temp_input_attr[] = {
5689 THERMAL_ATTRS(8),
5690 THERMAL_ATTRS(9),
5691 THERMAL_ATTRS(10),
5692 THERMAL_ATTRS(11),
5693 THERMAL_ATTRS(12),
5694 THERMAL_ATTRS(13),
5695 THERMAL_ATTRS(14),
5696 THERMAL_ATTRS(15),
5697 THERMAL_ATTRS(0),
5698 THERMAL_ATTRS(1),
5699 THERMAL_ATTRS(2),
5700 THERMAL_ATTRS(3),
5701 THERMAL_ATTRS(4),
5702 THERMAL_ATTRS(5),
5703 THERMAL_ATTRS(6),
5704 THERMAL_ATTRS(7),
5705 NULL
5706 };
5707
5708 static const struct attribute_group thermal_temp_input16_group = {
5709 .attrs = thermal_temp_input_attr
5710 };
5711
5712 static const struct attribute_group thermal_temp_input8_group = {
5713 .attrs = &thermal_temp_input_attr[8]
5714 };
5715
5716 #undef THERMAL_SENSOR_ATTR_TEMP
5717 #undef THERMAL_ATTRS
5718
5719 /* --------------------------------------------------------------------- */
5720
thermal_init(struct ibm_init_struct * iibm)5721 static int __init thermal_init(struct ibm_init_struct *iibm)
5722 {
5723 u8 t, ta1, ta2;
5724 int i;
5725 int acpi_tmp7;
5726 int res;
5727
5728 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5729
5730 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5731
5732 if (thinkpad_id.ec_model) {
5733 /*
5734 * Direct EC access mode: sensors at registers
5735 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5736 * non-implemented, thermal sensors return 0x80 when
5737 * not available
5738 */
5739
5740 ta1 = ta2 = 0;
5741 for (i = 0; i < 8; i++) {
5742 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5743 ta1 |= t;
5744 } else {
5745 ta1 = 0;
5746 break;
5747 }
5748 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5749 ta2 |= t;
5750 } else {
5751 ta1 = 0;
5752 break;
5753 }
5754 }
5755 if (ta1 == 0) {
5756 /* This is sheer paranoia, but we handle it anyway */
5757 if (acpi_tmp7) {
5758 pr_err("ThinkPad ACPI EC access misbehaving, "
5759 "falling back to ACPI TMPx access "
5760 "mode\n");
5761 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5762 } else {
5763 pr_err("ThinkPad ACPI EC access misbehaving, "
5764 "disabling thermal sensors access\n");
5765 thermal_read_mode = TPACPI_THERMAL_NONE;
5766 }
5767 } else {
5768 thermal_read_mode =
5769 (ta2 != 0) ?
5770 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5771 }
5772 } else if (acpi_tmp7) {
5773 if (tpacpi_is_ibm() &&
5774 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5775 /* 600e/x, 770e, 770x */
5776 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5777 } else {
5778 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
5779 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5780 }
5781 } else {
5782 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5783 thermal_read_mode = TPACPI_THERMAL_NONE;
5784 }
5785
5786 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5787 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5788 thermal_read_mode);
5789
5790 switch (thermal_read_mode) {
5791 case TPACPI_THERMAL_TPEC_16:
5792 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5793 &thermal_temp_input16_group);
5794 if (res)
5795 return res;
5796 break;
5797 case TPACPI_THERMAL_TPEC_8:
5798 case TPACPI_THERMAL_ACPI_TMP07:
5799 case TPACPI_THERMAL_ACPI_UPDT:
5800 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5801 &thermal_temp_input8_group);
5802 if (res)
5803 return res;
5804 break;
5805 case TPACPI_THERMAL_NONE:
5806 default:
5807 return 1;
5808 }
5809
5810 return 0;
5811 }
5812
thermal_exit(void)5813 static void thermal_exit(void)
5814 {
5815 switch (thermal_read_mode) {
5816 case TPACPI_THERMAL_TPEC_16:
5817 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5818 &thermal_temp_input16_group);
5819 break;
5820 case TPACPI_THERMAL_TPEC_8:
5821 case TPACPI_THERMAL_ACPI_TMP07:
5822 case TPACPI_THERMAL_ACPI_UPDT:
5823 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5824 &thermal_temp_input8_group);
5825 break;
5826 case TPACPI_THERMAL_NONE:
5827 default:
5828 break;
5829 }
5830 }
5831
thermal_read(struct seq_file * m)5832 static int thermal_read(struct seq_file *m)
5833 {
5834 int n, i;
5835 struct ibm_thermal_sensors_struct t;
5836
5837 n = thermal_get_sensors(&t);
5838 if (unlikely(n < 0))
5839 return n;
5840
5841 seq_printf(m, "temperatures:\t");
5842
5843 if (n > 0) {
5844 for (i = 0; i < (n - 1); i++)
5845 seq_printf(m, "%d ", t.temp[i] / 1000);
5846 seq_printf(m, "%d\n", t.temp[i] / 1000);
5847 } else
5848 seq_printf(m, "not supported\n");
5849
5850 return 0;
5851 }
5852
5853 static struct ibm_struct thermal_driver_data = {
5854 .name = "thermal",
5855 .read = thermal_read,
5856 .exit = thermal_exit,
5857 };
5858
5859 /*************************************************************************
5860 * Backlight/brightness subdriver
5861 */
5862
5863 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5864
5865 /*
5866 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5867 * CMOS NVRAM byte 0x5E, bits 0-3.
5868 *
5869 * EC HBRV (0x31) has the following layout
5870 * Bit 7: unknown function
5871 * Bit 6: unknown function
5872 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5873 * Bit 4: must be set to zero to avoid problems
5874 * Bit 3-0: backlight brightness level
5875 *
5876 * brightness_get_raw returns status data in the HBRV layout
5877 *
5878 * WARNING: The X61 has been verified to use HBRV for something else, so
5879 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5880 * testing on the very early *60 Lenovo models...
5881 */
5882
5883 enum {
5884 TP_EC_BACKLIGHT = 0x31,
5885
5886 /* TP_EC_BACKLIGHT bitmasks */
5887 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5888 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5889 TP_EC_BACKLIGHT_MAPSW = 0x20,
5890 };
5891
5892 enum tpacpi_brightness_access_mode {
5893 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5894 TPACPI_BRGHT_MODE_EC, /* EC control */
5895 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5896 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5897 TPACPI_BRGHT_MODE_MAX
5898 };
5899
5900 static struct backlight_device *ibm_backlight_device;
5901
5902 static enum tpacpi_brightness_access_mode brightness_mode =
5903 TPACPI_BRGHT_MODE_MAX;
5904
5905 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5906
5907 static struct mutex brightness_mutex;
5908
5909 /* NVRAM brightness access,
5910 * call with brightness_mutex held! */
tpacpi_brightness_nvram_get(void)5911 static unsigned int tpacpi_brightness_nvram_get(void)
5912 {
5913 u8 lnvram;
5914
5915 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5916 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5917 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5918 lnvram &= bright_maxlvl;
5919
5920 return lnvram;
5921 }
5922
tpacpi_brightness_checkpoint_nvram(void)5923 static void tpacpi_brightness_checkpoint_nvram(void)
5924 {
5925 u8 lec = 0;
5926 u8 b_nvram;
5927
5928 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5929 return;
5930
5931 vdbg_printk(TPACPI_DBG_BRGHT,
5932 "trying to checkpoint backlight level to NVRAM...\n");
5933
5934 if (mutex_lock_killable(&brightness_mutex) < 0)
5935 return;
5936
5937 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5938 goto unlock;
5939 lec &= TP_EC_BACKLIGHT_LVLMSK;
5940 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5941
5942 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5943 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5944 /* NVRAM needs update */
5945 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5946 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5947 b_nvram |= lec;
5948 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5949 dbg_printk(TPACPI_DBG_BRGHT,
5950 "updated NVRAM backlight level to %u (0x%02x)\n",
5951 (unsigned int) lec, (unsigned int) b_nvram);
5952 } else
5953 vdbg_printk(TPACPI_DBG_BRGHT,
5954 "NVRAM backlight level already is %u (0x%02x)\n",
5955 (unsigned int) lec, (unsigned int) b_nvram);
5956
5957 unlock:
5958 mutex_unlock(&brightness_mutex);
5959 }
5960
5961
5962 /* call with brightness_mutex held! */
tpacpi_brightness_get_raw(int * status)5963 static int tpacpi_brightness_get_raw(int *status)
5964 {
5965 u8 lec = 0;
5966
5967 switch (brightness_mode) {
5968 case TPACPI_BRGHT_MODE_UCMS_STEP:
5969 *status = tpacpi_brightness_nvram_get();
5970 return 0;
5971 case TPACPI_BRGHT_MODE_EC:
5972 case TPACPI_BRGHT_MODE_ECNVRAM:
5973 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5974 return -EIO;
5975 *status = lec;
5976 return 0;
5977 default:
5978 return -ENXIO;
5979 }
5980 }
5981
5982 /* call with brightness_mutex held! */
5983 /* do NOT call with illegal backlight level value */
tpacpi_brightness_set_ec(unsigned int value)5984 static int tpacpi_brightness_set_ec(unsigned int value)
5985 {
5986 u8 lec = 0;
5987
5988 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5989 return -EIO;
5990
5991 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5992 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5993 (value & TP_EC_BACKLIGHT_LVLMSK))))
5994 return -EIO;
5995
5996 return 0;
5997 }
5998
5999 /* call with brightness_mutex held! */
tpacpi_brightness_set_ucmsstep(unsigned int value)6000 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6001 {
6002 int cmos_cmd, inc;
6003 unsigned int current_value, i;
6004
6005 current_value = tpacpi_brightness_nvram_get();
6006
6007 if (value == current_value)
6008 return 0;
6009
6010 cmos_cmd = (value > current_value) ?
6011 TP_CMOS_BRIGHTNESS_UP :
6012 TP_CMOS_BRIGHTNESS_DOWN;
6013 inc = (value > current_value) ? 1 : -1;
6014
6015 for (i = current_value; i != value; i += inc)
6016 if (issue_thinkpad_cmos_command(cmos_cmd))
6017 return -EIO;
6018
6019 return 0;
6020 }
6021
6022 /* May return EINTR which can always be mapped to ERESTARTSYS */
brightness_set(unsigned int value)6023 static int brightness_set(unsigned int value)
6024 {
6025 int res;
6026
6027 if (value > bright_maxlvl || value < 0)
6028 return -EINVAL;
6029
6030 vdbg_printk(TPACPI_DBG_BRGHT,
6031 "set backlight level to %d\n", value);
6032
6033 res = mutex_lock_killable(&brightness_mutex);
6034 if (res < 0)
6035 return res;
6036
6037 switch (brightness_mode) {
6038 case TPACPI_BRGHT_MODE_EC:
6039 case TPACPI_BRGHT_MODE_ECNVRAM:
6040 res = tpacpi_brightness_set_ec(value);
6041 break;
6042 case TPACPI_BRGHT_MODE_UCMS_STEP:
6043 res = tpacpi_brightness_set_ucmsstep(value);
6044 break;
6045 default:
6046 res = -ENXIO;
6047 }
6048
6049 mutex_unlock(&brightness_mutex);
6050 return res;
6051 }
6052
6053 /* sysfs backlight class ----------------------------------------------- */
6054
brightness_update_status(struct backlight_device * bd)6055 static int brightness_update_status(struct backlight_device *bd)
6056 {
6057 unsigned int level =
6058 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6059 bd->props.power == FB_BLANK_UNBLANK) ?
6060 bd->props.brightness : 0;
6061
6062 dbg_printk(TPACPI_DBG_BRGHT,
6063 "backlight: attempt to set level to %d\n",
6064 level);
6065
6066 /* it is the backlight class's job (caller) to handle
6067 * EINTR and other errors properly */
6068 return brightness_set(level);
6069 }
6070
brightness_get(struct backlight_device * bd)6071 static int brightness_get(struct backlight_device *bd)
6072 {
6073 int status, res;
6074
6075 res = mutex_lock_killable(&brightness_mutex);
6076 if (res < 0)
6077 return 0;
6078
6079 res = tpacpi_brightness_get_raw(&status);
6080
6081 mutex_unlock(&brightness_mutex);
6082
6083 if (res < 0)
6084 return 0;
6085
6086 return status & TP_EC_BACKLIGHT_LVLMSK;
6087 }
6088
tpacpi_brightness_notify_change(void)6089 static void tpacpi_brightness_notify_change(void)
6090 {
6091 backlight_force_update(ibm_backlight_device,
6092 BACKLIGHT_UPDATE_HOTKEY);
6093 }
6094
6095 static const struct backlight_ops ibm_backlight_data = {
6096 .get_brightness = brightness_get,
6097 .update_status = brightness_update_status,
6098 };
6099
6100 /* --------------------------------------------------------------------- */
6101
6102 /*
6103 * Call _BCL method of video device. On some ThinkPads this will
6104 * switch the firmware to the ACPI brightness control mode.
6105 */
6106
tpacpi_query_bcl_levels(acpi_handle handle)6107 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6108 {
6109 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6110 union acpi_object *obj;
6111 int rc;
6112
6113 if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) {
6114 obj = (union acpi_object *)buffer.pointer;
6115 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6116 pr_err("Unknown _BCL data, please report this to %s\n",
6117 TPACPI_MAIL);
6118 rc = 0;
6119 } else {
6120 rc = obj->package.count;
6121 }
6122 } else {
6123 return 0;
6124 }
6125
6126 kfree(buffer.pointer);
6127 return rc;
6128 }
6129
6130
6131 /*
6132 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6133 */
tpacpi_check_std_acpi_brightness_support(void)6134 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6135 {
6136 acpi_handle video_device;
6137 int bcl_levels = 0;
6138
6139 tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device);
6140 if (video_device)
6141 bcl_levels = tpacpi_query_bcl_levels(video_device);
6142
6143 tp_features.bright_acpimode = (bcl_levels > 0);
6144
6145 return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6146 }
6147
6148 /*
6149 * These are only useful for models that have only one possibility
6150 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6151 * these quirks.
6152 */
6153 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6154 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6155 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6156
6157 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6158 /* Models with ATI GPUs known to require ECNVRAM mode */
6159 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6160
6161 /* Models with ATI GPUs that can use ECNVRAM */
6162 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */
6163 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6164 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */
6165 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6166
6167 /* Models with Intel Extreme Graphics 2 */
6168 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */
6169 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6170 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6171
6172 /* Models with Intel GMA900 */
6173 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6174 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6175 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6176 };
6177
6178 /*
6179 * Returns < 0 for error, otherwise sets tp_features.bright_*
6180 * and bright_maxlvl.
6181 */
tpacpi_detect_brightness_capabilities(void)6182 static void __init tpacpi_detect_brightness_capabilities(void)
6183 {
6184 unsigned int b;
6185
6186 vdbg_printk(TPACPI_DBG_INIT,
6187 "detecting firmware brightness interface capabilities\n");
6188
6189 /* we could run a quirks check here (same table used by
6190 * brightness_init) if needed */
6191
6192 /*
6193 * We always attempt to detect acpi support, so as to switch
6194 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6195 * going to publish a backlight interface
6196 */
6197 b = tpacpi_check_std_acpi_brightness_support();
6198 switch (b) {
6199 case 16:
6200 bright_maxlvl = 15;
6201 pr_info("detected a 16-level brightness capable ThinkPad\n");
6202 break;
6203 case 8:
6204 case 0:
6205 bright_maxlvl = 7;
6206 pr_info("detected a 8-level brightness capable ThinkPad\n");
6207 break;
6208 default:
6209 pr_err("Unsupported brightness interface, "
6210 "please contact %s\n", TPACPI_MAIL);
6211 tp_features.bright_unkfw = 1;
6212 bright_maxlvl = b - 1;
6213 }
6214 }
6215
brightness_init(struct ibm_init_struct * iibm)6216 static int __init brightness_init(struct ibm_init_struct *iibm)
6217 {
6218 struct backlight_properties props;
6219 int b;
6220 unsigned long quirks;
6221
6222 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6223
6224 mutex_init(&brightness_mutex);
6225
6226 quirks = tpacpi_check_quirks(brightness_quirk_table,
6227 ARRAY_SIZE(brightness_quirk_table));
6228
6229 /* tpacpi_detect_brightness_capabilities() must have run already */
6230
6231 /* if it is unknown, we don't handle it: it wouldn't be safe */
6232 if (tp_features.bright_unkfw)
6233 return 1;
6234
6235 if (!brightness_enable) {
6236 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6237 "brightness support disabled by "
6238 "module parameter\n");
6239 return 1;
6240 }
6241
6242 if (acpi_video_backlight_support()) {
6243 if (brightness_enable > 1) {
6244 pr_info("Standard ACPI backlight interface "
6245 "available, not loading native one\n");
6246 return 1;
6247 } else if (brightness_enable == 1) {
6248 pr_warn("Cannot enable backlight brightness support, "
6249 "ACPI is already handling it. Refer to the "
6250 "acpi_backlight kernel parameter.\n");
6251 return 1;
6252 }
6253 } else if (tp_features.bright_acpimode && brightness_enable > 1) {
6254 pr_notice("Standard ACPI backlight interface not "
6255 "available, thinkpad_acpi native "
6256 "brightness control enabled\n");
6257 }
6258
6259 /*
6260 * Check for module parameter bogosity, note that we
6261 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6262 * able to detect "unspecified"
6263 */
6264 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6265 return -EINVAL;
6266
6267 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6268 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6269 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6270 if (quirks & TPACPI_BRGHT_Q_EC)
6271 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6272 else
6273 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6274
6275 dbg_printk(TPACPI_DBG_BRGHT,
6276 "driver auto-selected brightness_mode=%d\n",
6277 brightness_mode);
6278 }
6279
6280 /* Safety */
6281 if (!tpacpi_is_ibm() &&
6282 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6283 brightness_mode == TPACPI_BRGHT_MODE_EC))
6284 return -EINVAL;
6285
6286 if (tpacpi_brightness_get_raw(&b) < 0)
6287 return 1;
6288
6289 memset(&props, 0, sizeof(struct backlight_properties));
6290 props.type = BACKLIGHT_PLATFORM;
6291 props.max_brightness = bright_maxlvl;
6292 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6293 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6294 NULL, NULL,
6295 &ibm_backlight_data,
6296 &props);
6297 if (IS_ERR(ibm_backlight_device)) {
6298 int rc = PTR_ERR(ibm_backlight_device);
6299 ibm_backlight_device = NULL;
6300 pr_err("Could not register backlight device\n");
6301 return rc;
6302 }
6303 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6304 "brightness is supported\n");
6305
6306 if (quirks & TPACPI_BRGHT_Q_ASK) {
6307 pr_notice("brightness: will use unverified default: "
6308 "brightness_mode=%d\n", brightness_mode);
6309 pr_notice("brightness: please report to %s whether it works well "
6310 "or not on your ThinkPad\n", TPACPI_MAIL);
6311 }
6312
6313 /* Added by mistake in early 2007. Probably useless, but it could
6314 * be working around some unknown firmware problem where the value
6315 * read at startup doesn't match the real hardware state... so leave
6316 * it in place just in case */
6317 backlight_update_status(ibm_backlight_device);
6318
6319 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6320 "brightness: registering brightness hotkeys "
6321 "as change notification\n");
6322 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6323 | TP_ACPI_HKEY_BRGHTUP_MASK
6324 | TP_ACPI_HKEY_BRGHTDWN_MASK);
6325 return 0;
6326 }
6327
brightness_suspend(void)6328 static void brightness_suspend(void)
6329 {
6330 tpacpi_brightness_checkpoint_nvram();
6331 }
6332
brightness_shutdown(void)6333 static void brightness_shutdown(void)
6334 {
6335 tpacpi_brightness_checkpoint_nvram();
6336 }
6337
brightness_exit(void)6338 static void brightness_exit(void)
6339 {
6340 if (ibm_backlight_device) {
6341 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6342 "calling backlight_device_unregister()\n");
6343 backlight_device_unregister(ibm_backlight_device);
6344 }
6345
6346 tpacpi_brightness_checkpoint_nvram();
6347 }
6348
brightness_read(struct seq_file * m)6349 static int brightness_read(struct seq_file *m)
6350 {
6351 int level;
6352
6353 level = brightness_get(NULL);
6354 if (level < 0) {
6355 seq_printf(m, "level:\t\tunreadable\n");
6356 } else {
6357 seq_printf(m, "level:\t\t%d\n", level);
6358 seq_printf(m, "commands:\tup, down\n");
6359 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
6360 bright_maxlvl);
6361 }
6362
6363 return 0;
6364 }
6365
brightness_write(char * buf)6366 static int brightness_write(char *buf)
6367 {
6368 int level;
6369 int rc;
6370 char *cmd;
6371
6372 level = brightness_get(NULL);
6373 if (level < 0)
6374 return level;
6375
6376 while ((cmd = next_cmd(&buf))) {
6377 if (strlencmp(cmd, "up") == 0) {
6378 if (level < bright_maxlvl)
6379 level++;
6380 } else if (strlencmp(cmd, "down") == 0) {
6381 if (level > 0)
6382 level--;
6383 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6384 level >= 0 && level <= bright_maxlvl) {
6385 /* new level set */
6386 } else
6387 return -EINVAL;
6388 }
6389
6390 tpacpi_disclose_usertask("procfs brightness",
6391 "set level to %d\n", level);
6392
6393 /*
6394 * Now we know what the final level should be, so we try to set it.
6395 * Doing it this way makes the syscall restartable in case of EINTR
6396 */
6397 rc = brightness_set(level);
6398 if (!rc && ibm_backlight_device)
6399 backlight_force_update(ibm_backlight_device,
6400 BACKLIGHT_UPDATE_SYSFS);
6401 return (rc == -EINTR)? -ERESTARTSYS : rc;
6402 }
6403
6404 static struct ibm_struct brightness_driver_data = {
6405 .name = "brightness",
6406 .read = brightness_read,
6407 .write = brightness_write,
6408 .exit = brightness_exit,
6409 .suspend = brightness_suspend,
6410 .shutdown = brightness_shutdown,
6411 };
6412
6413 /*************************************************************************
6414 * Volume subdriver
6415 */
6416
6417 /*
6418 * IBM ThinkPads have a simple volume controller with MUTE gating.
6419 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6420 *
6421 * Since the *61 series (and probably also the later *60 series), Lenovo
6422 * ThinkPads only implement the MUTE gate.
6423 *
6424 * EC register 0x30
6425 * Bit 6: MUTE (1 mutes sound)
6426 * Bit 3-0: Volume
6427 * Other bits should be zero as far as we know.
6428 *
6429 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6430 * bits 3-0 (volume). Other bits in NVRAM may have other functions,
6431 * such as bit 7 which is used to detect repeated presses of MUTE,
6432 * and we leave them unchanged.
6433 */
6434
6435 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
6436
6437 #define TPACPI_ALSA_DRVNAME "ThinkPad EC"
6438 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
6439 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
6440
6441 static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */
6442 static char *alsa_id = "ThinkPadEC";
6443 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
6444
6445 struct tpacpi_alsa_data {
6446 struct snd_card *card;
6447 struct snd_ctl_elem_id *ctl_mute_id;
6448 struct snd_ctl_elem_id *ctl_vol_id;
6449 };
6450
6451 static struct snd_card *alsa_card;
6452
6453 enum {
6454 TP_EC_AUDIO = 0x30,
6455
6456 /* TP_EC_AUDIO bits */
6457 TP_EC_AUDIO_MUTESW = 6,
6458
6459 /* TP_EC_AUDIO bitmasks */
6460 TP_EC_AUDIO_LVL_MSK = 0x0F,
6461 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6462
6463 /* Maximum volume */
6464 TP_EC_VOLUME_MAX = 14,
6465 };
6466
6467 enum tpacpi_volume_access_mode {
6468 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
6469 TPACPI_VOL_MODE_EC, /* Pure EC control */
6470 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
6471 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6472 TPACPI_VOL_MODE_MAX
6473 };
6474
6475 enum tpacpi_volume_capabilities {
6476 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
6477 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
6478 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
6479 TPACPI_VOL_CAP_MAX
6480 };
6481
6482 static enum tpacpi_volume_access_mode volume_mode =
6483 TPACPI_VOL_MODE_MAX;
6484
6485 static enum tpacpi_volume_capabilities volume_capabilities;
6486 static bool volume_control_allowed;
6487
6488 /*
6489 * Used to syncronize writers to TP_EC_AUDIO and
6490 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6491 */
6492 static struct mutex volume_mutex;
6493
tpacpi_volume_checkpoint_nvram(void)6494 static void tpacpi_volume_checkpoint_nvram(void)
6495 {
6496 u8 lec = 0;
6497 u8 b_nvram;
6498 u8 ec_mask;
6499
6500 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6501 return;
6502 if (!volume_control_allowed)
6503 return;
6504
6505 vdbg_printk(TPACPI_DBG_MIXER,
6506 "trying to checkpoint mixer state to NVRAM...\n");
6507
6508 if (tp_features.mixer_no_level_control)
6509 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6510 else
6511 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6512
6513 if (mutex_lock_killable(&volume_mutex) < 0)
6514 return;
6515
6516 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6517 goto unlock;
6518 lec &= ec_mask;
6519 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6520
6521 if (lec != (b_nvram & ec_mask)) {
6522 /* NVRAM needs update */
6523 b_nvram &= ~ec_mask;
6524 b_nvram |= lec;
6525 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6526 dbg_printk(TPACPI_DBG_MIXER,
6527 "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6528 (unsigned int) lec, (unsigned int) b_nvram);
6529 } else {
6530 vdbg_printk(TPACPI_DBG_MIXER,
6531 "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6532 (unsigned int) lec, (unsigned int) b_nvram);
6533 }
6534
6535 unlock:
6536 mutex_unlock(&volume_mutex);
6537 }
6538
volume_get_status_ec(u8 * status)6539 static int volume_get_status_ec(u8 *status)
6540 {
6541 u8 s;
6542
6543 if (!acpi_ec_read(TP_EC_AUDIO, &s))
6544 return -EIO;
6545
6546 *status = s;
6547
6548 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6549
6550 return 0;
6551 }
6552
volume_get_status(u8 * status)6553 static int volume_get_status(u8 *status)
6554 {
6555 return volume_get_status_ec(status);
6556 }
6557
volume_set_status_ec(const u8 status)6558 static int volume_set_status_ec(const u8 status)
6559 {
6560 if (!acpi_ec_write(TP_EC_AUDIO, status))
6561 return -EIO;
6562
6563 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6564
6565 return 0;
6566 }
6567
volume_set_status(const u8 status)6568 static int volume_set_status(const u8 status)
6569 {
6570 return volume_set_status_ec(status);
6571 }
6572
6573 /* returns < 0 on error, 0 on no change, 1 on change */
__volume_set_mute_ec(const bool mute)6574 static int __volume_set_mute_ec(const bool mute)
6575 {
6576 int rc;
6577 u8 s, n;
6578
6579 if (mutex_lock_killable(&volume_mutex) < 0)
6580 return -EINTR;
6581
6582 rc = volume_get_status_ec(&s);
6583 if (rc)
6584 goto unlock;
6585
6586 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6587 s & ~TP_EC_AUDIO_MUTESW_MSK;
6588
6589 if (n != s) {
6590 rc = volume_set_status_ec(n);
6591 if (!rc)
6592 rc = 1;
6593 }
6594
6595 unlock:
6596 mutex_unlock(&volume_mutex);
6597 return rc;
6598 }
6599
volume_alsa_set_mute(const bool mute)6600 static int volume_alsa_set_mute(const bool mute)
6601 {
6602 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
6603 (mute) ? "" : "un");
6604 return __volume_set_mute_ec(mute);
6605 }
6606
volume_set_mute(const bool mute)6607 static int volume_set_mute(const bool mute)
6608 {
6609 int rc;
6610
6611 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6612 (mute) ? "" : "un");
6613
6614 rc = __volume_set_mute_ec(mute);
6615 return (rc < 0) ? rc : 0;
6616 }
6617
6618 /* returns < 0 on error, 0 on no change, 1 on change */
__volume_set_volume_ec(const u8 vol)6619 static int __volume_set_volume_ec(const u8 vol)
6620 {
6621 int rc;
6622 u8 s, n;
6623
6624 if (vol > TP_EC_VOLUME_MAX)
6625 return -EINVAL;
6626
6627 if (mutex_lock_killable(&volume_mutex) < 0)
6628 return -EINTR;
6629
6630 rc = volume_get_status_ec(&s);
6631 if (rc)
6632 goto unlock;
6633
6634 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6635
6636 if (n != s) {
6637 rc = volume_set_status_ec(n);
6638 if (!rc)
6639 rc = 1;
6640 }
6641
6642 unlock:
6643 mutex_unlock(&volume_mutex);
6644 return rc;
6645 }
6646
volume_alsa_set_volume(const u8 vol)6647 static int volume_alsa_set_volume(const u8 vol)
6648 {
6649 dbg_printk(TPACPI_DBG_MIXER,
6650 "ALSA: trying to set volume level to %hu\n", vol);
6651 return __volume_set_volume_ec(vol);
6652 }
6653
volume_alsa_notify_change(void)6654 static void volume_alsa_notify_change(void)
6655 {
6656 struct tpacpi_alsa_data *d;
6657
6658 if (alsa_card && alsa_card->private_data) {
6659 d = alsa_card->private_data;
6660 if (d->ctl_mute_id)
6661 snd_ctl_notify(alsa_card,
6662 SNDRV_CTL_EVENT_MASK_VALUE,
6663 d->ctl_mute_id);
6664 if (d->ctl_vol_id)
6665 snd_ctl_notify(alsa_card,
6666 SNDRV_CTL_EVENT_MASK_VALUE,
6667 d->ctl_vol_id);
6668 }
6669 }
6670
volume_alsa_vol_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)6671 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
6672 struct snd_ctl_elem_info *uinfo)
6673 {
6674 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
6675 uinfo->count = 1;
6676 uinfo->value.integer.min = 0;
6677 uinfo->value.integer.max = TP_EC_VOLUME_MAX;
6678 return 0;
6679 }
6680
volume_alsa_vol_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)6681 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
6682 struct snd_ctl_elem_value *ucontrol)
6683 {
6684 u8 s;
6685 int rc;
6686
6687 rc = volume_get_status(&s);
6688 if (rc < 0)
6689 return rc;
6690
6691 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
6692 return 0;
6693 }
6694
volume_alsa_vol_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)6695 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
6696 struct snd_ctl_elem_value *ucontrol)
6697 {
6698 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
6699 ucontrol->value.integer.value[0]);
6700 return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
6701 }
6702
6703 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
6704
volume_alsa_mute_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)6705 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
6706 struct snd_ctl_elem_value *ucontrol)
6707 {
6708 u8 s;
6709 int rc;
6710
6711 rc = volume_get_status(&s);
6712 if (rc < 0)
6713 return rc;
6714
6715 ucontrol->value.integer.value[0] =
6716 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
6717 return 0;
6718 }
6719
volume_alsa_mute_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)6720 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
6721 struct snd_ctl_elem_value *ucontrol)
6722 {
6723 tpacpi_disclose_usertask("ALSA", "%smute\n",
6724 ucontrol->value.integer.value[0] ?
6725 "un" : "");
6726 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
6727 }
6728
6729 static struct snd_kcontrol_new volume_alsa_control_vol = {
6730 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6731 .name = "Console Playback Volume",
6732 .index = 0,
6733 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6734 .info = volume_alsa_vol_info,
6735 .get = volume_alsa_vol_get,
6736 };
6737
6738 static struct snd_kcontrol_new volume_alsa_control_mute = {
6739 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6740 .name = "Console Playback Switch",
6741 .index = 0,
6742 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6743 .info = volume_alsa_mute_info,
6744 .get = volume_alsa_mute_get,
6745 };
6746
volume_suspend(void)6747 static void volume_suspend(void)
6748 {
6749 tpacpi_volume_checkpoint_nvram();
6750 }
6751
volume_resume(void)6752 static void volume_resume(void)
6753 {
6754 volume_alsa_notify_change();
6755 }
6756
volume_shutdown(void)6757 static void volume_shutdown(void)
6758 {
6759 tpacpi_volume_checkpoint_nvram();
6760 }
6761
volume_exit(void)6762 static void volume_exit(void)
6763 {
6764 if (alsa_card) {
6765 snd_card_free(alsa_card);
6766 alsa_card = NULL;
6767 }
6768
6769 tpacpi_volume_checkpoint_nvram();
6770 }
6771
volume_create_alsa_mixer(void)6772 static int __init volume_create_alsa_mixer(void)
6773 {
6774 struct snd_card *card;
6775 struct tpacpi_alsa_data *data;
6776 struct snd_kcontrol *ctl_vol;
6777 struct snd_kcontrol *ctl_mute;
6778 int rc;
6779
6780 rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE,
6781 sizeof(struct tpacpi_alsa_data), &card);
6782 if (rc < 0 || !card) {
6783 pr_err("Failed to create ALSA card structures: %d\n", rc);
6784 return 1;
6785 }
6786
6787 BUG_ON(!card->private_data);
6788 data = card->private_data;
6789 data->card = card;
6790
6791 strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
6792 sizeof(card->driver));
6793 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
6794 sizeof(card->shortname));
6795 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
6796 (thinkpad_id.ec_version_str) ?
6797 thinkpad_id.ec_version_str : "(unknown)");
6798 snprintf(card->longname, sizeof(card->longname),
6799 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
6800 (thinkpad_id.ec_version_str) ?
6801 thinkpad_id.ec_version_str : "unknown");
6802
6803 if (volume_control_allowed) {
6804 volume_alsa_control_vol.put = volume_alsa_vol_put;
6805 volume_alsa_control_vol.access =
6806 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6807
6808 volume_alsa_control_mute.put = volume_alsa_mute_put;
6809 volume_alsa_control_mute.access =
6810 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6811 }
6812
6813 if (!tp_features.mixer_no_level_control) {
6814 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
6815 rc = snd_ctl_add(card, ctl_vol);
6816 if (rc < 0) {
6817 pr_err("Failed to create ALSA volume control: %d\n",
6818 rc);
6819 goto err_exit;
6820 }
6821 data->ctl_vol_id = &ctl_vol->id;
6822 }
6823
6824 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
6825 rc = snd_ctl_add(card, ctl_mute);
6826 if (rc < 0) {
6827 pr_err("Failed to create ALSA mute control: %d\n", rc);
6828 goto err_exit;
6829 }
6830 data->ctl_mute_id = &ctl_mute->id;
6831
6832 snd_card_set_dev(card, &tpacpi_pdev->dev);
6833 rc = snd_card_register(card);
6834 if (rc < 0) {
6835 pr_err("Failed to register ALSA card: %d\n", rc);
6836 goto err_exit;
6837 }
6838
6839 alsa_card = card;
6840 return 0;
6841
6842 err_exit:
6843 snd_card_free(card);
6844 return 1;
6845 }
6846
6847 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
6848 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
6849
6850 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
6851 /* Whitelist volume level on all IBM by default */
6852 { .vendor = PCI_VENDOR_ID_IBM,
6853 .bios = TPACPI_MATCH_ANY,
6854 .ec = TPACPI_MATCH_ANY,
6855 .quirks = TPACPI_VOL_Q_LEVEL },
6856
6857 /* Lenovo models with volume control (needs confirmation) */
6858 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
6859 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
6860 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
6861 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
6862 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
6863 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
6864 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
6865
6866 /* Whitelist mute-only on all Lenovo by default */
6867 { .vendor = PCI_VENDOR_ID_LENOVO,
6868 .bios = TPACPI_MATCH_ANY,
6869 .ec = TPACPI_MATCH_ANY,
6870 .quirks = TPACPI_VOL_Q_MUTEONLY }
6871 };
6872
volume_init(struct ibm_init_struct * iibm)6873 static int __init volume_init(struct ibm_init_struct *iibm)
6874 {
6875 unsigned long quirks;
6876 int rc;
6877
6878 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
6879
6880 mutex_init(&volume_mutex);
6881
6882 /*
6883 * Check for module parameter bogosity, note that we
6884 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
6885 * able to detect "unspecified"
6886 */
6887 if (volume_mode > TPACPI_VOL_MODE_MAX)
6888 return -EINVAL;
6889
6890 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
6891 pr_err("UCMS step volume mode not implemented, "
6892 "please contact %s\n", TPACPI_MAIL);
6893 return 1;
6894 }
6895
6896 if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
6897 return -EINVAL;
6898
6899 /*
6900 * The ALSA mixer is our primary interface.
6901 * When disabled, don't install the subdriver at all
6902 */
6903 if (!alsa_enable) {
6904 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6905 "ALSA mixer disabled by parameter, "
6906 "not loading volume subdriver...\n");
6907 return 1;
6908 }
6909
6910 quirks = tpacpi_check_quirks(volume_quirk_table,
6911 ARRAY_SIZE(volume_quirk_table));
6912
6913 switch (volume_capabilities) {
6914 case TPACPI_VOL_CAP_AUTO:
6915 if (quirks & TPACPI_VOL_Q_MUTEONLY)
6916 tp_features.mixer_no_level_control = 1;
6917 else if (quirks & TPACPI_VOL_Q_LEVEL)
6918 tp_features.mixer_no_level_control = 0;
6919 else
6920 return 1; /* no mixer */
6921 break;
6922 case TPACPI_VOL_CAP_VOLMUTE:
6923 tp_features.mixer_no_level_control = 0;
6924 break;
6925 case TPACPI_VOL_CAP_MUTEONLY:
6926 tp_features.mixer_no_level_control = 1;
6927 break;
6928 default:
6929 return 1;
6930 }
6931
6932 if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
6933 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6934 "using user-supplied volume_capabilities=%d\n",
6935 volume_capabilities);
6936
6937 if (volume_mode == TPACPI_VOL_MODE_AUTO ||
6938 volume_mode == TPACPI_VOL_MODE_MAX) {
6939 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
6940
6941 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6942 "driver auto-selected volume_mode=%d\n",
6943 volume_mode);
6944 } else {
6945 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6946 "using user-supplied volume_mode=%d\n",
6947 volume_mode);
6948 }
6949
6950 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6951 "mute is supported, volume control is %s\n",
6952 str_supported(!tp_features.mixer_no_level_control));
6953
6954 rc = volume_create_alsa_mixer();
6955 if (rc) {
6956 pr_err("Could not create the ALSA mixer interface\n");
6957 return rc;
6958 }
6959
6960 pr_info("Console audio control enabled, mode: %s\n",
6961 (volume_control_allowed) ?
6962 "override (read/write)" :
6963 "monitor (read only)");
6964
6965 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6966 "registering volume hotkeys as change notification\n");
6967 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6968 | TP_ACPI_HKEY_VOLUP_MASK
6969 | TP_ACPI_HKEY_VOLDWN_MASK
6970 | TP_ACPI_HKEY_MUTE_MASK);
6971
6972 return 0;
6973 }
6974
volume_read(struct seq_file * m)6975 static int volume_read(struct seq_file *m)
6976 {
6977 u8 status;
6978
6979 if (volume_get_status(&status) < 0) {
6980 seq_printf(m, "level:\t\tunreadable\n");
6981 } else {
6982 if (tp_features.mixer_no_level_control)
6983 seq_printf(m, "level:\t\tunsupported\n");
6984 else
6985 seq_printf(m, "level:\t\t%d\n",
6986 status & TP_EC_AUDIO_LVL_MSK);
6987
6988 seq_printf(m, "mute:\t\t%s\n",
6989 onoff(status, TP_EC_AUDIO_MUTESW));
6990
6991 if (volume_control_allowed) {
6992 seq_printf(m, "commands:\tunmute, mute\n");
6993 if (!tp_features.mixer_no_level_control) {
6994 seq_printf(m,
6995 "commands:\tup, down\n");
6996 seq_printf(m,
6997 "commands:\tlevel <level>"
6998 " (<level> is 0-%d)\n",
6999 TP_EC_VOLUME_MAX);
7000 }
7001 }
7002 }
7003
7004 return 0;
7005 }
7006
volume_write(char * buf)7007 static int volume_write(char *buf)
7008 {
7009 u8 s;
7010 u8 new_level, new_mute;
7011 int l;
7012 char *cmd;
7013 int rc;
7014
7015 /*
7016 * We do allow volume control at driver startup, so that the
7017 * user can set initial state through the volume=... parameter hack.
7018 */
7019 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7020 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7021 tp_warned.volume_ctrl_forbidden = 1;
7022 pr_notice("Console audio control in monitor mode, "
7023 "changes are not allowed\n");
7024 pr_notice("Use the volume_control=1 module parameter "
7025 "to enable volume control\n");
7026 }
7027 return -EPERM;
7028 }
7029
7030 rc = volume_get_status(&s);
7031 if (rc < 0)
7032 return rc;
7033
7034 new_level = s & TP_EC_AUDIO_LVL_MSK;
7035 new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
7036
7037 while ((cmd = next_cmd(&buf))) {
7038 if (!tp_features.mixer_no_level_control) {
7039 if (strlencmp(cmd, "up") == 0) {
7040 if (new_mute)
7041 new_mute = 0;
7042 else if (new_level < TP_EC_VOLUME_MAX)
7043 new_level++;
7044 continue;
7045 } else if (strlencmp(cmd, "down") == 0) {
7046 if (new_mute)
7047 new_mute = 0;
7048 else if (new_level > 0)
7049 new_level--;
7050 continue;
7051 } else if (sscanf(cmd, "level %u", &l) == 1 &&
7052 l >= 0 && l <= TP_EC_VOLUME_MAX) {
7053 new_level = l;
7054 continue;
7055 }
7056 }
7057 if (strlencmp(cmd, "mute") == 0)
7058 new_mute = TP_EC_AUDIO_MUTESW_MSK;
7059 else if (strlencmp(cmd, "unmute") == 0)
7060 new_mute = 0;
7061 else
7062 return -EINVAL;
7063 }
7064
7065 if (tp_features.mixer_no_level_control) {
7066 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7067 new_mute ? "" : "un");
7068 rc = volume_set_mute(!!new_mute);
7069 } else {
7070 tpacpi_disclose_usertask("procfs volume",
7071 "%smute and set level to %d\n",
7072 new_mute ? "" : "un", new_level);
7073 rc = volume_set_status(new_mute | new_level);
7074 }
7075 volume_alsa_notify_change();
7076
7077 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7078 }
7079
7080 static struct ibm_struct volume_driver_data = {
7081 .name = "volume",
7082 .read = volume_read,
7083 .write = volume_write,
7084 .exit = volume_exit,
7085 .suspend = volume_suspend,
7086 .resume = volume_resume,
7087 .shutdown = volume_shutdown,
7088 };
7089
7090 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7091
7092 #define alsa_card NULL
7093
volume_alsa_notify_change(void)7094 static void inline volume_alsa_notify_change(void)
7095 {
7096 }
7097
volume_init(struct ibm_init_struct * iibm)7098 static int __init volume_init(struct ibm_init_struct *iibm)
7099 {
7100 pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7101
7102 return 1;
7103 }
7104
7105 static struct ibm_struct volume_driver_data = {
7106 .name = "volume",
7107 };
7108
7109 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7110
7111 /*************************************************************************
7112 * Fan subdriver
7113 */
7114
7115 /*
7116 * FAN ACCESS MODES
7117 *
7118 * TPACPI_FAN_RD_ACPI_GFAN:
7119 * ACPI GFAN method: returns fan level
7120 *
7121 * see TPACPI_FAN_WR_ACPI_SFAN
7122 * EC 0x2f (HFSP) not available if GFAN exists
7123 *
7124 * TPACPI_FAN_WR_ACPI_SFAN:
7125 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7126 *
7127 * EC 0x2f (HFSP) might be available *for reading*, but do not use
7128 * it for writing.
7129 *
7130 * TPACPI_FAN_WR_TPEC:
7131 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
7132 * Supported on almost all ThinkPads
7133 *
7134 * Fan speed changes of any sort (including those caused by the
7135 * disengaged mode) are usually done slowly by the firmware as the
7136 * maximum amount of fan duty cycle change per second seems to be
7137 * limited.
7138 *
7139 * Reading is not available if GFAN exists.
7140 * Writing is not available if SFAN exists.
7141 *
7142 * Bits
7143 * 7 automatic mode engaged;
7144 * (default operation mode of the ThinkPad)
7145 * fan level is ignored in this mode.
7146 * 6 full speed mode (takes precedence over bit 7);
7147 * not available on all thinkpads. May disable
7148 * the tachometer while the fan controller ramps up
7149 * the speed (which can take up to a few *minutes*).
7150 * Speeds up fan to 100% duty-cycle, which is far above
7151 * the standard RPM levels. It is not impossible that
7152 * it could cause hardware damage.
7153 * 5-3 unused in some models. Extra bits for fan level
7154 * in others, but still useless as all values above
7155 * 7 map to the same speed as level 7 in these models.
7156 * 2-0 fan level (0..7 usually)
7157 * 0x00 = stop
7158 * 0x07 = max (set when temperatures critical)
7159 * Some ThinkPads may have other levels, see
7160 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7161 *
7162 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7163 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7164 * does so, its initial value is meaningless (0x07).
7165 *
7166 * For firmware bugs, refer to:
7167 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7168 *
7169 * ----
7170 *
7171 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7172 * Main fan tachometer reading (in RPM)
7173 *
7174 * This register is present on all ThinkPads with a new-style EC, and
7175 * it is known not to be present on the A21m/e, and T22, as there is
7176 * something else in offset 0x84 according to the ACPI DSDT. Other
7177 * ThinkPads from this same time period (and earlier) probably lack the
7178 * tachometer as well.
7179 *
7180 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7181 * was never fixed by IBM to report the EC firmware version string
7182 * probably support the tachometer (like the early X models), so
7183 * detecting it is quite hard. We need more data to know for sure.
7184 *
7185 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7186 * might result.
7187 *
7188 * FIRMWARE BUG: may go stale while the EC is switching to full speed
7189 * mode.
7190 *
7191 * For firmware bugs, refer to:
7192 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7193 *
7194 * ----
7195 *
7196 * ThinkPad EC register 0x31 bit 0 (only on select models)
7197 *
7198 * When bit 0 of EC register 0x31 is zero, the tachometer registers
7199 * show the speed of the main fan. When bit 0 of EC register 0x31
7200 * is one, the tachometer registers show the speed of the auxiliary
7201 * fan.
7202 *
7203 * Fan control seems to affect both fans, regardless of the state
7204 * of this bit.
7205 *
7206 * So far, only the firmware for the X60/X61 non-tablet versions
7207 * seem to support this (firmware TP-7M).
7208 *
7209 * TPACPI_FAN_WR_ACPI_FANS:
7210 * ThinkPad X31, X40, X41. Not available in the X60.
7211 *
7212 * FANS ACPI handle: takes three arguments: low speed, medium speed,
7213 * high speed. ACPI DSDT seems to map these three speeds to levels
7214 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7215 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7216 *
7217 * The speeds are stored on handles
7218 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7219 *
7220 * There are three default speed sets, accessible as handles:
7221 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7222 *
7223 * ACPI DSDT switches which set is in use depending on various
7224 * factors.
7225 *
7226 * TPACPI_FAN_WR_TPEC is also available and should be used to
7227 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
7228 * but the ACPI tables just mention level 7.
7229 */
7230
7231 enum { /* Fan control constants */
7232 fan_status_offset = 0x2f, /* EC register 0x2f */
7233 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
7234 * 0x84 must be read before 0x85 */
7235 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
7236 bit 0 selects which fan is active */
7237
7238 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
7239 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
7240
7241 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
7242 };
7243
7244 enum fan_status_access_mode {
7245 TPACPI_FAN_NONE = 0, /* No fan status or control */
7246 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
7247 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7248 };
7249
7250 enum fan_control_access_mode {
7251 TPACPI_FAN_WR_NONE = 0, /* No fan control */
7252 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
7253 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
7254 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
7255 };
7256
7257 enum fan_control_commands {
7258 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
7259 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
7260 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
7261 * and also watchdog cmd */
7262 };
7263
7264 static bool fan_control_allowed;
7265
7266 static enum fan_status_access_mode fan_status_access_mode;
7267 static enum fan_control_access_mode fan_control_access_mode;
7268 static enum fan_control_commands fan_control_commands;
7269
7270 static u8 fan_control_initial_status;
7271 static u8 fan_control_desired_level;
7272 static u8 fan_control_resume_level;
7273 static int fan_watchdog_maxinterval;
7274
7275 static struct mutex fan_mutex;
7276
7277 static void fan_watchdog_fire(struct work_struct *ignored);
7278 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
7279
7280 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
7281 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
7282 "\\FSPD", /* 600e/x, 770e, 770x */
7283 ); /* all others */
7284 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
7285 "JFNS", /* 770x-JL */
7286 ); /* all others */
7287
7288 /*
7289 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7290 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7291 * be in auto mode (0x80).
7292 *
7293 * This is corrected by any write to HFSP either by the driver, or
7294 * by the firmware.
7295 *
7296 * We assume 0x07 really means auto mode while this quirk is active,
7297 * as this is far more likely than the ThinkPad being in level 7,
7298 * which is only used by the firmware during thermal emergencies.
7299 *
7300 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7301 * TP-70 (T43, R52), which are known to be buggy.
7302 */
7303
fan_quirk1_setup(void)7304 static void fan_quirk1_setup(void)
7305 {
7306 if (fan_control_initial_status == 0x07) {
7307 pr_notice("fan_init: initial fan status is unknown, "
7308 "assuming it is in auto mode\n");
7309 tp_features.fan_ctrl_status_undef = 1;
7310 }
7311 }
7312
fan_quirk1_handle(u8 * fan_status)7313 static void fan_quirk1_handle(u8 *fan_status)
7314 {
7315 if (unlikely(tp_features.fan_ctrl_status_undef)) {
7316 if (*fan_status != fan_control_initial_status) {
7317 /* something changed the HFSP regisnter since
7318 * driver init time, so it is not undefined
7319 * anymore */
7320 tp_features.fan_ctrl_status_undef = 0;
7321 } else {
7322 /* Return most likely status. In fact, it
7323 * might be the only possible status */
7324 *fan_status = TP_EC_FAN_AUTO;
7325 }
7326 }
7327 }
7328
7329 /* Select main fan on X60/X61, NOOP on others */
fan_select_fan1(void)7330 static bool fan_select_fan1(void)
7331 {
7332 if (tp_features.second_fan) {
7333 u8 val;
7334
7335 if (ec_read(fan_select_offset, &val) < 0)
7336 return false;
7337 val &= 0xFEU;
7338 if (ec_write(fan_select_offset, val) < 0)
7339 return false;
7340 }
7341 return true;
7342 }
7343
7344 /* Select secondary fan on X60/X61 */
fan_select_fan2(void)7345 static bool fan_select_fan2(void)
7346 {
7347 u8 val;
7348
7349 if (!tp_features.second_fan)
7350 return false;
7351
7352 if (ec_read(fan_select_offset, &val) < 0)
7353 return false;
7354 val |= 0x01U;
7355 if (ec_write(fan_select_offset, val) < 0)
7356 return false;
7357
7358 return true;
7359 }
7360
7361 /*
7362 * Call with fan_mutex held
7363 */
fan_update_desired_level(u8 status)7364 static void fan_update_desired_level(u8 status)
7365 {
7366 if ((status &
7367 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7368 if (status > 7)
7369 fan_control_desired_level = 7;
7370 else
7371 fan_control_desired_level = status;
7372 }
7373 }
7374
fan_get_status(u8 * status)7375 static int fan_get_status(u8 *status)
7376 {
7377 u8 s;
7378
7379 /* TODO:
7380 * Add TPACPI_FAN_RD_ACPI_FANS ? */
7381
7382 switch (fan_status_access_mode) {
7383 case TPACPI_FAN_RD_ACPI_GFAN: {
7384 /* 570, 600e/x, 770e, 770x */
7385 int res;
7386
7387 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
7388 return -EIO;
7389
7390 if (likely(status))
7391 *status = res & 0x07;
7392
7393 break;
7394 }
7395 case TPACPI_FAN_RD_TPEC:
7396 /* all except 570, 600e/x, 770e, 770x */
7397 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7398 return -EIO;
7399
7400 if (likely(status)) {
7401 *status = s;
7402 fan_quirk1_handle(status);
7403 }
7404
7405 break;
7406
7407 default:
7408 return -ENXIO;
7409 }
7410
7411 return 0;
7412 }
7413
fan_get_status_safe(u8 * status)7414 static int fan_get_status_safe(u8 *status)
7415 {
7416 int rc;
7417 u8 s;
7418
7419 if (mutex_lock_killable(&fan_mutex))
7420 return -ERESTARTSYS;
7421 rc = fan_get_status(&s);
7422 if (!rc)
7423 fan_update_desired_level(s);
7424 mutex_unlock(&fan_mutex);
7425
7426 if (status)
7427 *status = s;
7428
7429 return rc;
7430 }
7431
fan_get_speed(unsigned int * speed)7432 static int fan_get_speed(unsigned int *speed)
7433 {
7434 u8 hi, lo;
7435
7436 switch (fan_status_access_mode) {
7437 case TPACPI_FAN_RD_TPEC:
7438 /* all except 570, 600e/x, 770e, 770x */
7439 if (unlikely(!fan_select_fan1()))
7440 return -EIO;
7441 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7442 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7443 return -EIO;
7444
7445 if (likely(speed))
7446 *speed = (hi << 8) | lo;
7447
7448 break;
7449
7450 default:
7451 return -ENXIO;
7452 }
7453
7454 return 0;
7455 }
7456
fan2_get_speed(unsigned int * speed)7457 static int fan2_get_speed(unsigned int *speed)
7458 {
7459 u8 hi, lo;
7460 bool rc;
7461
7462 switch (fan_status_access_mode) {
7463 case TPACPI_FAN_RD_TPEC:
7464 /* all except 570, 600e/x, 770e, 770x */
7465 if (unlikely(!fan_select_fan2()))
7466 return -EIO;
7467 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7468 !acpi_ec_read(fan_rpm_offset + 1, &hi);
7469 fan_select_fan1(); /* play it safe */
7470 if (rc)
7471 return -EIO;
7472
7473 if (likely(speed))
7474 *speed = (hi << 8) | lo;
7475
7476 break;
7477
7478 default:
7479 return -ENXIO;
7480 }
7481
7482 return 0;
7483 }
7484
fan_set_level(int level)7485 static int fan_set_level(int level)
7486 {
7487 if (!fan_control_allowed)
7488 return -EPERM;
7489
7490 switch (fan_control_access_mode) {
7491 case TPACPI_FAN_WR_ACPI_SFAN:
7492 if (level >= 0 && level <= 7) {
7493 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7494 return -EIO;
7495 } else
7496 return -EINVAL;
7497 break;
7498
7499 case TPACPI_FAN_WR_ACPI_FANS:
7500 case TPACPI_FAN_WR_TPEC:
7501 if (!(level & TP_EC_FAN_AUTO) &&
7502 !(level & TP_EC_FAN_FULLSPEED) &&
7503 ((level < 0) || (level > 7)))
7504 return -EINVAL;
7505
7506 /* safety net should the EC not support AUTO
7507 * or FULLSPEED mode bits and just ignore them */
7508 if (level & TP_EC_FAN_FULLSPEED)
7509 level |= 7; /* safety min speed 7 */
7510 else if (level & TP_EC_FAN_AUTO)
7511 level |= 4; /* safety min speed 4 */
7512
7513 if (!acpi_ec_write(fan_status_offset, level))
7514 return -EIO;
7515 else
7516 tp_features.fan_ctrl_status_undef = 0;
7517 break;
7518
7519 default:
7520 return -ENXIO;
7521 }
7522
7523 vdbg_printk(TPACPI_DBG_FAN,
7524 "fan control: set fan control register to 0x%02x\n", level);
7525 return 0;
7526 }
7527
fan_set_level_safe(int level)7528 static int fan_set_level_safe(int level)
7529 {
7530 int rc;
7531
7532 if (!fan_control_allowed)
7533 return -EPERM;
7534
7535 if (mutex_lock_killable(&fan_mutex))
7536 return -ERESTARTSYS;
7537
7538 if (level == TPACPI_FAN_LAST_LEVEL)
7539 level = fan_control_desired_level;
7540
7541 rc = fan_set_level(level);
7542 if (!rc)
7543 fan_update_desired_level(level);
7544
7545 mutex_unlock(&fan_mutex);
7546 return rc;
7547 }
7548
fan_set_enable(void)7549 static int fan_set_enable(void)
7550 {
7551 u8 s;
7552 int rc;
7553
7554 if (!fan_control_allowed)
7555 return -EPERM;
7556
7557 if (mutex_lock_killable(&fan_mutex))
7558 return -ERESTARTSYS;
7559
7560 switch (fan_control_access_mode) {
7561 case TPACPI_FAN_WR_ACPI_FANS:
7562 case TPACPI_FAN_WR_TPEC:
7563 rc = fan_get_status(&s);
7564 if (rc < 0)
7565 break;
7566
7567 /* Don't go out of emergency fan mode */
7568 if (s != 7) {
7569 s &= 0x07;
7570 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7571 }
7572
7573 if (!acpi_ec_write(fan_status_offset, s))
7574 rc = -EIO;
7575 else {
7576 tp_features.fan_ctrl_status_undef = 0;
7577 rc = 0;
7578 }
7579 break;
7580
7581 case TPACPI_FAN_WR_ACPI_SFAN:
7582 rc = fan_get_status(&s);
7583 if (rc < 0)
7584 break;
7585
7586 s &= 0x07;
7587
7588 /* Set fan to at least level 4 */
7589 s |= 4;
7590
7591 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7592 rc = -EIO;
7593 else
7594 rc = 0;
7595 break;
7596
7597 default:
7598 rc = -ENXIO;
7599 }
7600
7601 mutex_unlock(&fan_mutex);
7602
7603 if (!rc)
7604 vdbg_printk(TPACPI_DBG_FAN,
7605 "fan control: set fan control register to 0x%02x\n",
7606 s);
7607 return rc;
7608 }
7609
fan_set_disable(void)7610 static int fan_set_disable(void)
7611 {
7612 int rc;
7613
7614 if (!fan_control_allowed)
7615 return -EPERM;
7616
7617 if (mutex_lock_killable(&fan_mutex))
7618 return -ERESTARTSYS;
7619
7620 rc = 0;
7621 switch (fan_control_access_mode) {
7622 case TPACPI_FAN_WR_ACPI_FANS:
7623 case TPACPI_FAN_WR_TPEC:
7624 if (!acpi_ec_write(fan_status_offset, 0x00))
7625 rc = -EIO;
7626 else {
7627 fan_control_desired_level = 0;
7628 tp_features.fan_ctrl_status_undef = 0;
7629 }
7630 break;
7631
7632 case TPACPI_FAN_WR_ACPI_SFAN:
7633 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7634 rc = -EIO;
7635 else
7636 fan_control_desired_level = 0;
7637 break;
7638
7639 default:
7640 rc = -ENXIO;
7641 }
7642
7643 if (!rc)
7644 vdbg_printk(TPACPI_DBG_FAN,
7645 "fan control: set fan control register to 0\n");
7646
7647 mutex_unlock(&fan_mutex);
7648 return rc;
7649 }
7650
fan_set_speed(int speed)7651 static int fan_set_speed(int speed)
7652 {
7653 int rc;
7654
7655 if (!fan_control_allowed)
7656 return -EPERM;
7657
7658 if (mutex_lock_killable(&fan_mutex))
7659 return -ERESTARTSYS;
7660
7661 rc = 0;
7662 switch (fan_control_access_mode) {
7663 case TPACPI_FAN_WR_ACPI_FANS:
7664 if (speed >= 0 && speed <= 65535) {
7665 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7666 speed, speed, speed))
7667 rc = -EIO;
7668 } else
7669 rc = -EINVAL;
7670 break;
7671
7672 default:
7673 rc = -ENXIO;
7674 }
7675
7676 mutex_unlock(&fan_mutex);
7677 return rc;
7678 }
7679
fan_watchdog_reset(void)7680 static void fan_watchdog_reset(void)
7681 {
7682 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7683 return;
7684
7685 if (fan_watchdog_maxinterval > 0 &&
7686 tpacpi_lifecycle != TPACPI_LIFE_EXITING)
7687 mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
7688 msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
7689 else
7690 cancel_delayed_work(&fan_watchdog_task);
7691 }
7692
fan_watchdog_fire(struct work_struct * ignored)7693 static void fan_watchdog_fire(struct work_struct *ignored)
7694 {
7695 int rc;
7696
7697 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7698 return;
7699
7700 pr_notice("fan watchdog: enabling fan\n");
7701 rc = fan_set_enable();
7702 if (rc < 0) {
7703 pr_err("fan watchdog: error %d while enabling fan, "
7704 "will try again later...\n", -rc);
7705 /* reschedule for later */
7706 fan_watchdog_reset();
7707 }
7708 }
7709
7710 /*
7711 * SYSFS fan layout: hwmon compatible (device)
7712 *
7713 * pwm*_enable:
7714 * 0: "disengaged" mode
7715 * 1: manual mode
7716 * 2: native EC "auto" mode (recommended, hardware default)
7717 *
7718 * pwm*: set speed in manual mode, ignored otherwise.
7719 * 0 is level 0; 255 is level 7. Intermediate points done with linear
7720 * interpolation.
7721 *
7722 * fan*_input: tachometer reading, RPM
7723 *
7724 *
7725 * SYSFS fan layout: extensions
7726 *
7727 * fan_watchdog (driver):
7728 * fan watchdog interval in seconds, 0 disables (default), max 120
7729 */
7730
7731 /* sysfs fan pwm1_enable ----------------------------------------------- */
fan_pwm1_enable_show(struct device * dev,struct device_attribute * attr,char * buf)7732 static ssize_t fan_pwm1_enable_show(struct device *dev,
7733 struct device_attribute *attr,
7734 char *buf)
7735 {
7736 int res, mode;
7737 u8 status;
7738
7739 res = fan_get_status_safe(&status);
7740 if (res)
7741 return res;
7742
7743 if (status & TP_EC_FAN_FULLSPEED) {
7744 mode = 0;
7745 } else if (status & TP_EC_FAN_AUTO) {
7746 mode = 2;
7747 } else
7748 mode = 1;
7749
7750 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7751 }
7752
fan_pwm1_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)7753 static ssize_t fan_pwm1_enable_store(struct device *dev,
7754 struct device_attribute *attr,
7755 const char *buf, size_t count)
7756 {
7757 unsigned long t;
7758 int res, level;
7759
7760 if (parse_strtoul(buf, 2, &t))
7761 return -EINVAL;
7762
7763 tpacpi_disclose_usertask("hwmon pwm1_enable",
7764 "set fan mode to %lu\n", t);
7765
7766 switch (t) {
7767 case 0:
7768 level = TP_EC_FAN_FULLSPEED;
7769 break;
7770 case 1:
7771 level = TPACPI_FAN_LAST_LEVEL;
7772 break;
7773 case 2:
7774 level = TP_EC_FAN_AUTO;
7775 break;
7776 case 3:
7777 /* reserved for software-controlled auto mode */
7778 return -ENOSYS;
7779 default:
7780 return -EINVAL;
7781 }
7782
7783 res = fan_set_level_safe(level);
7784 if (res == -ENXIO)
7785 return -EINVAL;
7786 else if (res < 0)
7787 return res;
7788
7789 fan_watchdog_reset();
7790
7791 return count;
7792 }
7793
7794 static struct device_attribute dev_attr_fan_pwm1_enable =
7795 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7796 fan_pwm1_enable_show, fan_pwm1_enable_store);
7797
7798 /* sysfs fan pwm1 ------------------------------------------------------ */
fan_pwm1_show(struct device * dev,struct device_attribute * attr,char * buf)7799 static ssize_t fan_pwm1_show(struct device *dev,
7800 struct device_attribute *attr,
7801 char *buf)
7802 {
7803 int res;
7804 u8 status;
7805
7806 res = fan_get_status_safe(&status);
7807 if (res)
7808 return res;
7809
7810 if ((status &
7811 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7812 status = fan_control_desired_level;
7813
7814 if (status > 7)
7815 status = 7;
7816
7817 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7818 }
7819
fan_pwm1_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)7820 static ssize_t fan_pwm1_store(struct device *dev,
7821 struct device_attribute *attr,
7822 const char *buf, size_t count)
7823 {
7824 unsigned long s;
7825 int rc;
7826 u8 status, newlevel;
7827
7828 if (parse_strtoul(buf, 255, &s))
7829 return -EINVAL;
7830
7831 tpacpi_disclose_usertask("hwmon pwm1",
7832 "set fan speed to %lu\n", s);
7833
7834 /* scale down from 0-255 to 0-7 */
7835 newlevel = (s >> 5) & 0x07;
7836
7837 if (mutex_lock_killable(&fan_mutex))
7838 return -ERESTARTSYS;
7839
7840 rc = fan_get_status(&status);
7841 if (!rc && (status &
7842 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7843 rc = fan_set_level(newlevel);
7844 if (rc == -ENXIO)
7845 rc = -EINVAL;
7846 else if (!rc) {
7847 fan_update_desired_level(newlevel);
7848 fan_watchdog_reset();
7849 }
7850 }
7851
7852 mutex_unlock(&fan_mutex);
7853 return (rc)? rc : count;
7854 }
7855
7856 static struct device_attribute dev_attr_fan_pwm1 =
7857 __ATTR(pwm1, S_IWUSR | S_IRUGO,
7858 fan_pwm1_show, fan_pwm1_store);
7859
7860 /* sysfs fan fan1_input ------------------------------------------------ */
fan_fan1_input_show(struct device * dev,struct device_attribute * attr,char * buf)7861 static ssize_t fan_fan1_input_show(struct device *dev,
7862 struct device_attribute *attr,
7863 char *buf)
7864 {
7865 int res;
7866 unsigned int speed;
7867
7868 res = fan_get_speed(&speed);
7869 if (res < 0)
7870 return res;
7871
7872 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7873 }
7874
7875 static struct device_attribute dev_attr_fan_fan1_input =
7876 __ATTR(fan1_input, S_IRUGO,
7877 fan_fan1_input_show, NULL);
7878
7879 /* sysfs fan fan2_input ------------------------------------------------ */
fan_fan2_input_show(struct device * dev,struct device_attribute * attr,char * buf)7880 static ssize_t fan_fan2_input_show(struct device *dev,
7881 struct device_attribute *attr,
7882 char *buf)
7883 {
7884 int res;
7885 unsigned int speed;
7886
7887 res = fan2_get_speed(&speed);
7888 if (res < 0)
7889 return res;
7890
7891 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7892 }
7893
7894 static struct device_attribute dev_attr_fan_fan2_input =
7895 __ATTR(fan2_input, S_IRUGO,
7896 fan_fan2_input_show, NULL);
7897
7898 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
fan_fan_watchdog_show(struct device_driver * drv,char * buf)7899 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7900 char *buf)
7901 {
7902 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7903 }
7904
fan_fan_watchdog_store(struct device_driver * drv,const char * buf,size_t count)7905 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7906 const char *buf, size_t count)
7907 {
7908 unsigned long t;
7909
7910 if (parse_strtoul(buf, 120, &t))
7911 return -EINVAL;
7912
7913 if (!fan_control_allowed)
7914 return -EPERM;
7915
7916 fan_watchdog_maxinterval = t;
7917 fan_watchdog_reset();
7918
7919 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7920
7921 return count;
7922 }
7923
7924 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7925 fan_fan_watchdog_show, fan_fan_watchdog_store);
7926
7927 /* --------------------------------------------------------------------- */
7928 static struct attribute *fan_attributes[] = {
7929 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7930 &dev_attr_fan_fan1_input.attr,
7931 NULL, /* for fan2_input */
7932 NULL
7933 };
7934
7935 static const struct attribute_group fan_attr_group = {
7936 .attrs = fan_attributes,
7937 };
7938
7939 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7940 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7941
7942 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7943 { .vendor = PCI_VENDOR_ID_IBM, \
7944 .bios = TPACPI_MATCH_ANY, \
7945 .ec = TPID(__id1, __id2), \
7946 .quirks = __quirks }
7947
7948 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7949 { .vendor = PCI_VENDOR_ID_LENOVO, \
7950 .bios = TPACPI_MATCH_ANY, \
7951 .ec = TPID(__id1, __id2), \
7952 .quirks = __quirks }
7953
7954 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7955 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7956 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7957 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7958 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7959 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7960 };
7961
7962 #undef TPACPI_FAN_QL
7963 #undef TPACPI_FAN_QI
7964
fan_init(struct ibm_init_struct * iibm)7965 static int __init fan_init(struct ibm_init_struct *iibm)
7966 {
7967 int rc;
7968 unsigned long quirks;
7969
7970 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7971 "initializing fan subdriver\n");
7972
7973 mutex_init(&fan_mutex);
7974 fan_status_access_mode = TPACPI_FAN_NONE;
7975 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7976 fan_control_commands = 0;
7977 fan_watchdog_maxinterval = 0;
7978 tp_features.fan_ctrl_status_undef = 0;
7979 tp_features.second_fan = 0;
7980 fan_control_desired_level = 7;
7981
7982 if (tpacpi_is_ibm()) {
7983 TPACPI_ACPIHANDLE_INIT(fans);
7984 TPACPI_ACPIHANDLE_INIT(gfan);
7985 TPACPI_ACPIHANDLE_INIT(sfan);
7986 }
7987
7988 quirks = tpacpi_check_quirks(fan_quirk_table,
7989 ARRAY_SIZE(fan_quirk_table));
7990
7991 if (gfan_handle) {
7992 /* 570, 600e/x, 770e, 770x */
7993 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7994 } else {
7995 /* all other ThinkPads: note that even old-style
7996 * ThinkPad ECs supports the fan control register */
7997 if (likely(acpi_ec_read(fan_status_offset,
7998 &fan_control_initial_status))) {
7999 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
8000 if (quirks & TPACPI_FAN_Q1)
8001 fan_quirk1_setup();
8002 if (quirks & TPACPI_FAN_2FAN) {
8003 tp_features.second_fan = 1;
8004 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8005 "secondary fan support enabled\n");
8006 }
8007 } else {
8008 pr_err("ThinkPad ACPI EC access misbehaving, "
8009 "fan status and control unavailable\n");
8010 return 1;
8011 }
8012 }
8013
8014 if (sfan_handle) {
8015 /* 570, 770x-JL */
8016 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8017 fan_control_commands |=
8018 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8019 } else {
8020 if (!gfan_handle) {
8021 /* gfan without sfan means no fan control */
8022 /* all other models implement TP EC 0x2f control */
8023
8024 if (fans_handle) {
8025 /* X31, X40, X41 */
8026 fan_control_access_mode =
8027 TPACPI_FAN_WR_ACPI_FANS;
8028 fan_control_commands |=
8029 TPACPI_FAN_CMD_SPEED |
8030 TPACPI_FAN_CMD_LEVEL |
8031 TPACPI_FAN_CMD_ENABLE;
8032 } else {
8033 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8034 fan_control_commands |=
8035 TPACPI_FAN_CMD_LEVEL |
8036 TPACPI_FAN_CMD_ENABLE;
8037 }
8038 }
8039 }
8040
8041 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8042 "fan is %s, modes %d, %d\n",
8043 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8044 fan_control_access_mode != TPACPI_FAN_WR_NONE),
8045 fan_status_access_mode, fan_control_access_mode);
8046
8047 /* fan control master switch */
8048 if (!fan_control_allowed) {
8049 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8050 fan_control_commands = 0;
8051 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8052 "fan control features disabled by parameter\n");
8053 }
8054
8055 /* update fan_control_desired_level */
8056 if (fan_status_access_mode != TPACPI_FAN_NONE)
8057 fan_get_status_safe(NULL);
8058
8059 if (fan_status_access_mode != TPACPI_FAN_NONE ||
8060 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8061 if (tp_features.second_fan) {
8062 /* attach second fan tachometer */
8063 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8064 &dev_attr_fan_fan2_input.attr;
8065 }
8066 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
8067 &fan_attr_group);
8068 if (rc < 0)
8069 return rc;
8070
8071 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8072 &driver_attr_fan_watchdog);
8073 if (rc < 0) {
8074 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
8075 &fan_attr_group);
8076 return rc;
8077 }
8078 return 0;
8079 } else
8080 return 1;
8081 }
8082
fan_exit(void)8083 static void fan_exit(void)
8084 {
8085 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8086 "cancelling any pending fan watchdog tasks\n");
8087
8088 /* FIXME: can we really do this unconditionally? */
8089 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
8090 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8091 &driver_attr_fan_watchdog);
8092
8093 cancel_delayed_work(&fan_watchdog_task);
8094 flush_workqueue(tpacpi_wq);
8095 }
8096
fan_suspend(void)8097 static void fan_suspend(void)
8098 {
8099 int rc;
8100
8101 if (!fan_control_allowed)
8102 return;
8103
8104 /* Store fan status in cache */
8105 fan_control_resume_level = 0;
8106 rc = fan_get_status_safe(&fan_control_resume_level);
8107 if (rc < 0)
8108 pr_notice("failed to read fan level for later "
8109 "restore during resume: %d\n", rc);
8110
8111 /* if it is undefined, don't attempt to restore it.
8112 * KEEP THIS LAST */
8113 if (tp_features.fan_ctrl_status_undef)
8114 fan_control_resume_level = 0;
8115 }
8116
fan_resume(void)8117 static void fan_resume(void)
8118 {
8119 u8 current_level = 7;
8120 bool do_set = false;
8121 int rc;
8122
8123 /* DSDT *always* updates status on resume */
8124 tp_features.fan_ctrl_status_undef = 0;
8125
8126 if (!fan_control_allowed ||
8127 !fan_control_resume_level ||
8128 (fan_get_status_safe(¤t_level) < 0))
8129 return;
8130
8131 switch (fan_control_access_mode) {
8132 case TPACPI_FAN_WR_ACPI_SFAN:
8133 /* never decrease fan level */
8134 do_set = (fan_control_resume_level > current_level);
8135 break;
8136 case TPACPI_FAN_WR_ACPI_FANS:
8137 case TPACPI_FAN_WR_TPEC:
8138 /* never decrease fan level, scale is:
8139 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8140 *
8141 * We expect the firmware to set either 7 or AUTO, but we
8142 * handle FULLSPEED out of paranoia.
8143 *
8144 * So, we can safely only restore FULLSPEED or 7, anything
8145 * else could slow the fan. Restoring AUTO is useless, at
8146 * best that's exactly what the DSDT already set (it is the
8147 * slower it uses).
8148 *
8149 * Always keep in mind that the DSDT *will* have set the
8150 * fans to what the vendor supposes is the best level. We
8151 * muck with it only to speed the fan up.
8152 */
8153 if (fan_control_resume_level != 7 &&
8154 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8155 return;
8156 else
8157 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8158 (current_level != fan_control_resume_level);
8159 break;
8160 default:
8161 return;
8162 }
8163 if (do_set) {
8164 pr_notice("restoring fan level to 0x%02x\n",
8165 fan_control_resume_level);
8166 rc = fan_set_level_safe(fan_control_resume_level);
8167 if (rc < 0)
8168 pr_notice("failed to restore fan level: %d\n", rc);
8169 }
8170 }
8171
fan_read(struct seq_file * m)8172 static int fan_read(struct seq_file *m)
8173 {
8174 int rc;
8175 u8 status;
8176 unsigned int speed = 0;
8177
8178 switch (fan_status_access_mode) {
8179 case TPACPI_FAN_RD_ACPI_GFAN:
8180 /* 570, 600e/x, 770e, 770x */
8181 rc = fan_get_status_safe(&status);
8182 if (rc < 0)
8183 return rc;
8184
8185 seq_printf(m, "status:\t\t%s\n"
8186 "level:\t\t%d\n",
8187 (status != 0) ? "enabled" : "disabled", status);
8188 break;
8189
8190 case TPACPI_FAN_RD_TPEC:
8191 /* all except 570, 600e/x, 770e, 770x */
8192 rc = fan_get_status_safe(&status);
8193 if (rc < 0)
8194 return rc;
8195
8196 seq_printf(m, "status:\t\t%s\n",
8197 (status != 0) ? "enabled" : "disabled");
8198
8199 rc = fan_get_speed(&speed);
8200 if (rc < 0)
8201 return rc;
8202
8203 seq_printf(m, "speed:\t\t%d\n", speed);
8204
8205 if (status & TP_EC_FAN_FULLSPEED)
8206 /* Disengaged mode takes precedence */
8207 seq_printf(m, "level:\t\tdisengaged\n");
8208 else if (status & TP_EC_FAN_AUTO)
8209 seq_printf(m, "level:\t\tauto\n");
8210 else
8211 seq_printf(m, "level:\t\t%d\n", status);
8212 break;
8213
8214 case TPACPI_FAN_NONE:
8215 default:
8216 seq_printf(m, "status:\t\tnot supported\n");
8217 }
8218
8219 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
8220 seq_printf(m, "commands:\tlevel <level>");
8221
8222 switch (fan_control_access_mode) {
8223 case TPACPI_FAN_WR_ACPI_SFAN:
8224 seq_printf(m, " (<level> is 0-7)\n");
8225 break;
8226
8227 default:
8228 seq_printf(m, " (<level> is 0-7, "
8229 "auto, disengaged, full-speed)\n");
8230 break;
8231 }
8232 }
8233
8234 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
8235 seq_printf(m, "commands:\tenable, disable\n"
8236 "commands:\twatchdog <timeout> (<timeout> "
8237 "is 0 (off), 1-120 (seconds))\n");
8238
8239 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
8240 seq_printf(m, "commands:\tspeed <speed>"
8241 " (<speed> is 0-65535)\n");
8242
8243 return 0;
8244 }
8245
fan_write_cmd_level(const char * cmd,int * rc)8246 static int fan_write_cmd_level(const char *cmd, int *rc)
8247 {
8248 int level;
8249
8250 if (strlencmp(cmd, "level auto") == 0)
8251 level = TP_EC_FAN_AUTO;
8252 else if ((strlencmp(cmd, "level disengaged") == 0) |
8253 (strlencmp(cmd, "level full-speed") == 0))
8254 level = TP_EC_FAN_FULLSPEED;
8255 else if (sscanf(cmd, "level %d", &level) != 1)
8256 return 0;
8257
8258 *rc = fan_set_level_safe(level);
8259 if (*rc == -ENXIO)
8260 pr_err("level command accepted for unsupported access mode %d\n",
8261 fan_control_access_mode);
8262 else if (!*rc)
8263 tpacpi_disclose_usertask("procfs fan",
8264 "set level to %d\n", level);
8265
8266 return 1;
8267 }
8268
fan_write_cmd_enable(const char * cmd,int * rc)8269 static int fan_write_cmd_enable(const char *cmd, int *rc)
8270 {
8271 if (strlencmp(cmd, "enable") != 0)
8272 return 0;
8273
8274 *rc = fan_set_enable();
8275 if (*rc == -ENXIO)
8276 pr_err("enable command accepted for unsupported access mode %d\n",
8277 fan_control_access_mode);
8278 else if (!*rc)
8279 tpacpi_disclose_usertask("procfs fan", "enable\n");
8280
8281 return 1;
8282 }
8283
fan_write_cmd_disable(const char * cmd,int * rc)8284 static int fan_write_cmd_disable(const char *cmd, int *rc)
8285 {
8286 if (strlencmp(cmd, "disable") != 0)
8287 return 0;
8288
8289 *rc = fan_set_disable();
8290 if (*rc == -ENXIO)
8291 pr_err("disable command accepted for unsupported access mode %d\n",
8292 fan_control_access_mode);
8293 else if (!*rc)
8294 tpacpi_disclose_usertask("procfs fan", "disable\n");
8295
8296 return 1;
8297 }
8298
fan_write_cmd_speed(const char * cmd,int * rc)8299 static int fan_write_cmd_speed(const char *cmd, int *rc)
8300 {
8301 int speed;
8302
8303 /* TODO:
8304 * Support speed <low> <medium> <high> ? */
8305
8306 if (sscanf(cmd, "speed %d", &speed) != 1)
8307 return 0;
8308
8309 *rc = fan_set_speed(speed);
8310 if (*rc == -ENXIO)
8311 pr_err("speed command accepted for unsupported access mode %d\n",
8312 fan_control_access_mode);
8313 else if (!*rc)
8314 tpacpi_disclose_usertask("procfs fan",
8315 "set speed to %d\n", speed);
8316
8317 return 1;
8318 }
8319
fan_write_cmd_watchdog(const char * cmd,int * rc)8320 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8321 {
8322 int interval;
8323
8324 if (sscanf(cmd, "watchdog %d", &interval) != 1)
8325 return 0;
8326
8327 if (interval < 0 || interval > 120)
8328 *rc = -EINVAL;
8329 else {
8330 fan_watchdog_maxinterval = interval;
8331 tpacpi_disclose_usertask("procfs fan",
8332 "set watchdog timer to %d\n",
8333 interval);
8334 }
8335
8336 return 1;
8337 }
8338
fan_write(char * buf)8339 static int fan_write(char *buf)
8340 {
8341 char *cmd;
8342 int rc = 0;
8343
8344 while (!rc && (cmd = next_cmd(&buf))) {
8345 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8346 fan_write_cmd_level(cmd, &rc)) &&
8347 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8348 (fan_write_cmd_enable(cmd, &rc) ||
8349 fan_write_cmd_disable(cmd, &rc) ||
8350 fan_write_cmd_watchdog(cmd, &rc))) &&
8351 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8352 fan_write_cmd_speed(cmd, &rc))
8353 )
8354 rc = -EINVAL;
8355 else if (!rc)
8356 fan_watchdog_reset();
8357 }
8358
8359 return rc;
8360 }
8361
8362 static struct ibm_struct fan_driver_data = {
8363 .name = "fan",
8364 .read = fan_read,
8365 .write = fan_write,
8366 .exit = fan_exit,
8367 .suspend = fan_suspend,
8368 .resume = fan_resume,
8369 };
8370
8371 /****************************************************************************
8372 ****************************************************************************
8373 *
8374 * Infrastructure
8375 *
8376 ****************************************************************************
8377 ****************************************************************************/
8378
8379 /*
8380 * HKEY event callout for other subdrivers go here
8381 * (yes, it is ugly, but it is quick, safe, and gets the job done
8382 */
tpacpi_driver_event(const unsigned int hkey_event)8383 static void tpacpi_driver_event(const unsigned int hkey_event)
8384 {
8385 if (ibm_backlight_device) {
8386 switch (hkey_event) {
8387 case TP_HKEY_EV_BRGHT_UP:
8388 case TP_HKEY_EV_BRGHT_DOWN:
8389 tpacpi_brightness_notify_change();
8390 }
8391 }
8392 if (alsa_card) {
8393 switch (hkey_event) {
8394 case TP_HKEY_EV_VOL_UP:
8395 case TP_HKEY_EV_VOL_DOWN:
8396 case TP_HKEY_EV_VOL_MUTE:
8397 volume_alsa_notify_change();
8398 }
8399 }
8400 }
8401
hotkey_driver_event(const unsigned int scancode)8402 static void hotkey_driver_event(const unsigned int scancode)
8403 {
8404 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8405 }
8406
8407 /* sysfs name ---------------------------------------------------------- */
thinkpad_acpi_pdev_name_show(struct device * dev,struct device_attribute * attr,char * buf)8408 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8409 struct device_attribute *attr,
8410 char *buf)
8411 {
8412 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8413 }
8414
8415 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8416 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8417
8418 /* --------------------------------------------------------------------- */
8419
8420 /* /proc support */
8421 static struct proc_dir_entry *proc_dir;
8422
8423 /*
8424 * Module and infrastructure proble, init and exit handling
8425 */
8426
8427 static bool force_load;
8428
8429 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
str_supported(int is_supported)8430 static const char * __init str_supported(int is_supported)
8431 {
8432 static char text_unsupported[] __initdata = "not supported";
8433
8434 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
8435 }
8436 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8437
ibm_exit(struct ibm_struct * ibm)8438 static void ibm_exit(struct ibm_struct *ibm)
8439 {
8440 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8441
8442 list_del_init(&ibm->all_drivers);
8443
8444 if (ibm->flags.acpi_notify_installed) {
8445 dbg_printk(TPACPI_DBG_EXIT,
8446 "%s: acpi_remove_notify_handler\n", ibm->name);
8447 BUG_ON(!ibm->acpi);
8448 acpi_remove_notify_handler(*ibm->acpi->handle,
8449 ibm->acpi->type,
8450 dispatch_acpi_notify);
8451 ibm->flags.acpi_notify_installed = 0;
8452 }
8453
8454 if (ibm->flags.proc_created) {
8455 dbg_printk(TPACPI_DBG_EXIT,
8456 "%s: remove_proc_entry\n", ibm->name);
8457 remove_proc_entry(ibm->name, proc_dir);
8458 ibm->flags.proc_created = 0;
8459 }
8460
8461 if (ibm->flags.acpi_driver_registered) {
8462 dbg_printk(TPACPI_DBG_EXIT,
8463 "%s: acpi_bus_unregister_driver\n", ibm->name);
8464 BUG_ON(!ibm->acpi);
8465 acpi_bus_unregister_driver(ibm->acpi->driver);
8466 kfree(ibm->acpi->driver);
8467 ibm->acpi->driver = NULL;
8468 ibm->flags.acpi_driver_registered = 0;
8469 }
8470
8471 if (ibm->flags.init_called && ibm->exit) {
8472 ibm->exit();
8473 ibm->flags.init_called = 0;
8474 }
8475
8476 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8477 }
8478
ibm_init(struct ibm_init_struct * iibm)8479 static int __init ibm_init(struct ibm_init_struct *iibm)
8480 {
8481 int ret;
8482 struct ibm_struct *ibm = iibm->data;
8483 struct proc_dir_entry *entry;
8484
8485 BUG_ON(ibm == NULL);
8486
8487 INIT_LIST_HEAD(&ibm->all_drivers);
8488
8489 if (ibm->flags.experimental && !experimental)
8490 return 0;
8491
8492 dbg_printk(TPACPI_DBG_INIT,
8493 "probing for %s\n", ibm->name);
8494
8495 if (iibm->init) {
8496 ret = iibm->init(iibm);
8497 if (ret > 0)
8498 return 0; /* probe failed */
8499 if (ret)
8500 return ret;
8501
8502 ibm->flags.init_called = 1;
8503 }
8504
8505 if (ibm->acpi) {
8506 if (ibm->acpi->hid) {
8507 ret = register_tpacpi_subdriver(ibm);
8508 if (ret)
8509 goto err_out;
8510 }
8511
8512 if (ibm->acpi->notify) {
8513 ret = setup_acpi_notify(ibm);
8514 if (ret == -ENODEV) {
8515 pr_notice("disabling subdriver %s\n",
8516 ibm->name);
8517 ret = 0;
8518 goto err_out;
8519 }
8520 if (ret < 0)
8521 goto err_out;
8522 }
8523 }
8524
8525 dbg_printk(TPACPI_DBG_INIT,
8526 "%s installed\n", ibm->name);
8527
8528 if (ibm->read) {
8529 umode_t mode = iibm->base_procfs_mode;
8530
8531 if (!mode)
8532 mode = S_IRUGO;
8533 if (ibm->write)
8534 mode |= S_IWUSR;
8535 entry = proc_create_data(ibm->name, mode, proc_dir,
8536 &dispatch_proc_fops, ibm);
8537 if (!entry) {
8538 pr_err("unable to create proc entry %s\n", ibm->name);
8539 ret = -ENODEV;
8540 goto err_out;
8541 }
8542 ibm->flags.proc_created = 1;
8543 }
8544
8545 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8546
8547 return 0;
8548
8549 err_out:
8550 dbg_printk(TPACPI_DBG_INIT,
8551 "%s: at error exit path with result %d\n",
8552 ibm->name, ret);
8553
8554 ibm_exit(ibm);
8555 return (ret < 0)? ret : 0;
8556 }
8557
8558 /* Probing */
8559
tpacpi_is_fw_digit(const char c)8560 static bool __pure __init tpacpi_is_fw_digit(const char c)
8561 {
8562 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8563 }
8564
8565 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
tpacpi_is_valid_fw_id(const char * const s,const char t)8566 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
8567 const char t)
8568 {
8569 return s && strlen(s) >= 8 &&
8570 tpacpi_is_fw_digit(s[0]) &&
8571 tpacpi_is_fw_digit(s[1]) &&
8572 s[2] == t &&
8573 (s[3] == 'T' || s[3] == 'N') &&
8574 tpacpi_is_fw_digit(s[4]) &&
8575 tpacpi_is_fw_digit(s[5]);
8576 }
8577
8578 /* returns 0 - probe ok, or < 0 - probe error.
8579 * Probe ok doesn't mean thinkpad found.
8580 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
get_thinkpad_model_data(struct thinkpad_id_data * tp)8581 static int __must_check __init get_thinkpad_model_data(
8582 struct thinkpad_id_data *tp)
8583 {
8584 const struct dmi_device *dev = NULL;
8585 char ec_fw_string[18];
8586 char const *s;
8587
8588 if (!tp)
8589 return -EINVAL;
8590
8591 memset(tp, 0, sizeof(*tp));
8592
8593 if (dmi_name_in_vendors("IBM"))
8594 tp->vendor = PCI_VENDOR_ID_IBM;
8595 else if (dmi_name_in_vendors("LENOVO"))
8596 tp->vendor = PCI_VENDOR_ID_LENOVO;
8597 else
8598 return 0;
8599
8600 s = dmi_get_system_info(DMI_BIOS_VERSION);
8601 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8602 if (s && !tp->bios_version_str)
8603 return -ENOMEM;
8604
8605 /* Really ancient ThinkPad 240X will fail this, which is fine */
8606 if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') ||
8607 tpacpi_is_valid_fw_id(tp->bios_version_str, 'C')))
8608 return 0;
8609
8610 tp->bios_model = tp->bios_version_str[0]
8611 | (tp->bios_version_str[1] << 8);
8612 tp->bios_release = (tp->bios_version_str[4] << 8)
8613 | tp->bios_version_str[5];
8614
8615 /*
8616 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8617 * X32 or newer, all Z series; Some models must have an
8618 * up-to-date BIOS or they will not be detected.
8619 *
8620 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8621 */
8622 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8623 if (sscanf(dev->name,
8624 "IBM ThinkPad Embedded Controller -[%17c",
8625 ec_fw_string) == 1) {
8626 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8627 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8628
8629 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8630 if (!tp->ec_version_str)
8631 return -ENOMEM;
8632
8633 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8634 tp->ec_model = ec_fw_string[0]
8635 | (ec_fw_string[1] << 8);
8636 tp->ec_release = (ec_fw_string[4] << 8)
8637 | ec_fw_string[5];
8638 } else {
8639 pr_notice("ThinkPad firmware release %s "
8640 "doesn't match the known patterns\n",
8641 ec_fw_string);
8642 pr_notice("please report this to %s\n",
8643 TPACPI_MAIL);
8644 }
8645 break;
8646 }
8647 }
8648
8649 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8650 if (s && !(strnicmp(s, "ThinkPad", 8) && strnicmp(s, "Lenovo", 6))) {
8651 tp->model_str = kstrdup(s, GFP_KERNEL);
8652 if (!tp->model_str)
8653 return -ENOMEM;
8654 } else {
8655 s = dmi_get_system_info(DMI_BIOS_VENDOR);
8656 if (s && !(strnicmp(s, "Lenovo", 6))) {
8657 tp->model_str = kstrdup(s, GFP_KERNEL);
8658 if (!tp->model_str)
8659 return -ENOMEM;
8660 }
8661 }
8662
8663 s = dmi_get_system_info(DMI_PRODUCT_NAME);
8664 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8665 if (s && !tp->nummodel_str)
8666 return -ENOMEM;
8667
8668 return 0;
8669 }
8670
probe_for_thinkpad(void)8671 static int __init probe_for_thinkpad(void)
8672 {
8673 int is_thinkpad;
8674
8675 if (acpi_disabled)
8676 return -ENODEV;
8677
8678 /* It would be dangerous to run the driver in this case */
8679 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
8680 return -ENODEV;
8681
8682 /*
8683 * Non-ancient models have better DMI tagging, but very old models
8684 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
8685 */
8686 is_thinkpad = (thinkpad_id.model_str != NULL) ||
8687 (thinkpad_id.ec_model != 0) ||
8688 tpacpi_is_fw_known();
8689
8690 /* The EC handler is required */
8691 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
8692 if (!ec_handle) {
8693 if (is_thinkpad)
8694 pr_err("Not yet supported ThinkPad detected!\n");
8695 return -ENODEV;
8696 }
8697
8698 if (!is_thinkpad && !force_load)
8699 return -ENODEV;
8700
8701 return 0;
8702 }
8703
thinkpad_acpi_init_banner(void)8704 static void __init thinkpad_acpi_init_banner(void)
8705 {
8706 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
8707 pr_info("%s\n", TPACPI_URL);
8708
8709 pr_info("ThinkPad BIOS %s, EC %s\n",
8710 (thinkpad_id.bios_version_str) ?
8711 thinkpad_id.bios_version_str : "unknown",
8712 (thinkpad_id.ec_version_str) ?
8713 thinkpad_id.ec_version_str : "unknown");
8714
8715 BUG_ON(!thinkpad_id.vendor);
8716
8717 if (thinkpad_id.model_str)
8718 pr_info("%s %s, model %s\n",
8719 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
8720 "IBM" : ((thinkpad_id.vendor ==
8721 PCI_VENDOR_ID_LENOVO) ?
8722 "Lenovo" : "Unknown vendor"),
8723 thinkpad_id.model_str,
8724 (thinkpad_id.nummodel_str) ?
8725 thinkpad_id.nummodel_str : "unknown");
8726 }
8727
8728 /* Module init, exit, parameters */
8729
8730 static struct ibm_init_struct ibms_init[] __initdata = {
8731 {
8732 .data = &thinkpad_acpi_driver_data,
8733 },
8734 {
8735 .init = hotkey_init,
8736 .data = &hotkey_driver_data,
8737 },
8738 {
8739 .init = bluetooth_init,
8740 .data = &bluetooth_driver_data,
8741 },
8742 {
8743 .init = wan_init,
8744 .data = &wan_driver_data,
8745 },
8746 {
8747 .init = uwb_init,
8748 .data = &uwb_driver_data,
8749 },
8750 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8751 {
8752 .init = video_init,
8753 .base_procfs_mode = S_IRUSR,
8754 .data = &video_driver_data,
8755 },
8756 #endif
8757 {
8758 .init = light_init,
8759 .data = &light_driver_data,
8760 },
8761 {
8762 .init = cmos_init,
8763 .data = &cmos_driver_data,
8764 },
8765 {
8766 .init = led_init,
8767 .data = &led_driver_data,
8768 },
8769 {
8770 .init = beep_init,
8771 .data = &beep_driver_data,
8772 },
8773 {
8774 .init = thermal_init,
8775 .data = &thermal_driver_data,
8776 },
8777 {
8778 .init = brightness_init,
8779 .data = &brightness_driver_data,
8780 },
8781 {
8782 .init = volume_init,
8783 .data = &volume_driver_data,
8784 },
8785 {
8786 .init = fan_init,
8787 .data = &fan_driver_data,
8788 },
8789 };
8790
set_ibm_param(const char * val,struct kernel_param * kp)8791 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8792 {
8793 unsigned int i;
8794 struct ibm_struct *ibm;
8795
8796 if (!kp || !kp->name || !val)
8797 return -EINVAL;
8798
8799 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8800 ibm = ibms_init[i].data;
8801 WARN_ON(ibm == NULL);
8802
8803 if (!ibm || !ibm->name)
8804 continue;
8805
8806 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8807 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8808 return -ENOSPC;
8809 strcpy(ibms_init[i].param, val);
8810 strcat(ibms_init[i].param, ",");
8811 return 0;
8812 }
8813 }
8814
8815 return -EINVAL;
8816 }
8817
8818 module_param(experimental, int, 0444);
8819 MODULE_PARM_DESC(experimental,
8820 "Enables experimental features when non-zero");
8821
8822 module_param_named(debug, dbg_level, uint, 0);
8823 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8824
8825 module_param(force_load, bool, 0444);
8826 MODULE_PARM_DESC(force_load,
8827 "Attempts to load the driver even on a "
8828 "mis-identified ThinkPad when true");
8829
8830 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8831 MODULE_PARM_DESC(fan_control,
8832 "Enables setting fan parameters features when true");
8833
8834 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8835 MODULE_PARM_DESC(brightness_mode,
8836 "Selects brightness control strategy: "
8837 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8838
8839 module_param(brightness_enable, uint, 0444);
8840 MODULE_PARM_DESC(brightness_enable,
8841 "Enables backlight control when 1, disables when 0");
8842
8843 module_param(hotkey_report_mode, uint, 0444);
8844 MODULE_PARM_DESC(hotkey_report_mode,
8845 "used for backwards compatibility with userspace, "
8846 "see documentation");
8847
8848 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
8849 module_param_named(volume_mode, volume_mode, uint, 0444);
8850 MODULE_PARM_DESC(volume_mode,
8851 "Selects volume control strategy: "
8852 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
8853
8854 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
8855 MODULE_PARM_DESC(volume_capabilities,
8856 "Selects the mixer capabilites: "
8857 "0=auto, 1=volume and mute, 2=mute only");
8858
8859 module_param_named(volume_control, volume_control_allowed, bool, 0444);
8860 MODULE_PARM_DESC(volume_control,
8861 "Enables software override for the console audio "
8862 "control when true");
8863
8864 /* ALSA module API parameters */
8865 module_param_named(index, alsa_index, int, 0444);
8866 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
8867 module_param_named(id, alsa_id, charp, 0444);
8868 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
8869 module_param_named(enable, alsa_enable, bool, 0444);
8870 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
8871 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
8872
8873 #define TPACPI_PARAM(feature) \
8874 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8875 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8876 "at module load, see documentation")
8877
8878 TPACPI_PARAM(hotkey);
8879 TPACPI_PARAM(bluetooth);
8880 TPACPI_PARAM(video);
8881 TPACPI_PARAM(light);
8882 TPACPI_PARAM(cmos);
8883 TPACPI_PARAM(led);
8884 TPACPI_PARAM(beep);
8885 TPACPI_PARAM(brightness);
8886 TPACPI_PARAM(volume);
8887 TPACPI_PARAM(fan);
8888
8889 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8890 module_param(dbg_wlswemul, uint, 0444);
8891 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8892 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8893 MODULE_PARM_DESC(wlsw_state,
8894 "Initial state of the emulated WLSW switch");
8895
8896 module_param(dbg_bluetoothemul, uint, 0444);
8897 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8898 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8899 MODULE_PARM_DESC(bluetooth_state,
8900 "Initial state of the emulated bluetooth switch");
8901
8902 module_param(dbg_wwanemul, uint, 0444);
8903 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8904 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8905 MODULE_PARM_DESC(wwan_state,
8906 "Initial state of the emulated WWAN switch");
8907
8908 module_param(dbg_uwbemul, uint, 0444);
8909 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8910 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8911 MODULE_PARM_DESC(uwb_state,
8912 "Initial state of the emulated UWB switch");
8913 #endif
8914
thinkpad_acpi_module_exit(void)8915 static void thinkpad_acpi_module_exit(void)
8916 {
8917 struct ibm_struct *ibm, *itmp;
8918
8919 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8920
8921 list_for_each_entry_safe_reverse(ibm, itmp,
8922 &tpacpi_all_drivers,
8923 all_drivers) {
8924 ibm_exit(ibm);
8925 }
8926
8927 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8928
8929 if (tpacpi_inputdev) {
8930 if (tp_features.input_device_registered)
8931 input_unregister_device(tpacpi_inputdev);
8932 else
8933 input_free_device(tpacpi_inputdev);
8934 kfree(hotkey_keycode_map);
8935 }
8936
8937 if (tpacpi_hwmon)
8938 hwmon_device_unregister(tpacpi_hwmon);
8939
8940 if (tp_features.sensors_pdev_attrs_registered)
8941 device_remove_file(&tpacpi_sensors_pdev->dev,
8942 &dev_attr_thinkpad_acpi_pdev_name);
8943 if (tpacpi_sensors_pdev)
8944 platform_device_unregister(tpacpi_sensors_pdev);
8945 if (tpacpi_pdev)
8946 platform_device_unregister(tpacpi_pdev);
8947
8948 if (tp_features.sensors_pdrv_attrs_registered)
8949 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8950 if (tp_features.platform_drv_attrs_registered)
8951 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8952
8953 if (tp_features.sensors_pdrv_registered)
8954 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8955
8956 if (tp_features.platform_drv_registered)
8957 platform_driver_unregister(&tpacpi_pdriver);
8958
8959 if (proc_dir)
8960 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8961
8962 if (tpacpi_wq)
8963 destroy_workqueue(tpacpi_wq);
8964
8965 kfree(thinkpad_id.bios_version_str);
8966 kfree(thinkpad_id.ec_version_str);
8967 kfree(thinkpad_id.model_str);
8968 kfree(thinkpad_id.nummodel_str);
8969 }
8970
8971
thinkpad_acpi_module_init(void)8972 static int __init thinkpad_acpi_module_init(void)
8973 {
8974 int ret, i;
8975
8976 tpacpi_lifecycle = TPACPI_LIFE_INIT;
8977
8978 /* Parameter checking */
8979 if (hotkey_report_mode > 2)
8980 return -EINVAL;
8981
8982 /* Driver-level probe */
8983
8984 ret = get_thinkpad_model_data(&thinkpad_id);
8985 if (ret) {
8986 pr_err("unable to get DMI data: %d\n", ret);
8987 thinkpad_acpi_module_exit();
8988 return ret;
8989 }
8990 ret = probe_for_thinkpad();
8991 if (ret) {
8992 thinkpad_acpi_module_exit();
8993 return ret;
8994 }
8995
8996 /* Driver initialization */
8997
8998 thinkpad_acpi_init_banner();
8999 tpacpi_check_outdated_fw();
9000
9001 TPACPI_ACPIHANDLE_INIT(ecrd);
9002 TPACPI_ACPIHANDLE_INIT(ecwr);
9003
9004 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
9005 if (!tpacpi_wq) {
9006 thinkpad_acpi_module_exit();
9007 return -ENOMEM;
9008 }
9009
9010 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
9011 if (!proc_dir) {
9012 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
9013 thinkpad_acpi_module_exit();
9014 return -ENODEV;
9015 }
9016
9017 ret = platform_driver_register(&tpacpi_pdriver);
9018 if (ret) {
9019 pr_err("unable to register main platform driver\n");
9020 thinkpad_acpi_module_exit();
9021 return ret;
9022 }
9023 tp_features.platform_drv_registered = 1;
9024
9025 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
9026 if (ret) {
9027 pr_err("unable to register hwmon platform driver\n");
9028 thinkpad_acpi_module_exit();
9029 return ret;
9030 }
9031 tp_features.sensors_pdrv_registered = 1;
9032
9033 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
9034 if (!ret) {
9035 tp_features.platform_drv_attrs_registered = 1;
9036 ret = tpacpi_create_driver_attributes(
9037 &tpacpi_hwmon_pdriver.driver);
9038 }
9039 if (ret) {
9040 pr_err("unable to create sysfs driver attributes\n");
9041 thinkpad_acpi_module_exit();
9042 return ret;
9043 }
9044 tp_features.sensors_pdrv_attrs_registered = 1;
9045
9046
9047 /* Device initialization */
9048 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
9049 NULL, 0);
9050 if (IS_ERR(tpacpi_pdev)) {
9051 ret = PTR_ERR(tpacpi_pdev);
9052 tpacpi_pdev = NULL;
9053 pr_err("unable to register platform device\n");
9054 thinkpad_acpi_module_exit();
9055 return ret;
9056 }
9057 tpacpi_sensors_pdev = platform_device_register_simple(
9058 TPACPI_HWMON_DRVR_NAME,
9059 -1, NULL, 0);
9060 if (IS_ERR(tpacpi_sensors_pdev)) {
9061 ret = PTR_ERR(tpacpi_sensors_pdev);
9062 tpacpi_sensors_pdev = NULL;
9063 pr_err("unable to register hwmon platform device\n");
9064 thinkpad_acpi_module_exit();
9065 return ret;
9066 }
9067 ret = device_create_file(&tpacpi_sensors_pdev->dev,
9068 &dev_attr_thinkpad_acpi_pdev_name);
9069 if (ret) {
9070 pr_err("unable to create sysfs hwmon device attributes\n");
9071 thinkpad_acpi_module_exit();
9072 return ret;
9073 }
9074 tp_features.sensors_pdev_attrs_registered = 1;
9075 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
9076 if (IS_ERR(tpacpi_hwmon)) {
9077 ret = PTR_ERR(tpacpi_hwmon);
9078 tpacpi_hwmon = NULL;
9079 pr_err("unable to register hwmon device\n");
9080 thinkpad_acpi_module_exit();
9081 return ret;
9082 }
9083 mutex_init(&tpacpi_inputdev_send_mutex);
9084 tpacpi_inputdev = input_allocate_device();
9085 if (!tpacpi_inputdev) {
9086 pr_err("unable to allocate input device\n");
9087 thinkpad_acpi_module_exit();
9088 return -ENOMEM;
9089 } else {
9090 /* Prepare input device, but don't register */
9091 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
9092 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
9093 tpacpi_inputdev->id.bustype = BUS_HOST;
9094 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
9095 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
9096 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
9097 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
9098 }
9099
9100 /* Init subdriver dependencies */
9101 tpacpi_detect_brightness_capabilities();
9102
9103 /* Init subdrivers */
9104 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9105 ret = ibm_init(&ibms_init[i]);
9106 if (ret >= 0 && *ibms_init[i].param)
9107 ret = ibms_init[i].data->write(ibms_init[i].param);
9108 if (ret < 0) {
9109 thinkpad_acpi_module_exit();
9110 return ret;
9111 }
9112 }
9113
9114 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
9115
9116 ret = input_register_device(tpacpi_inputdev);
9117 if (ret < 0) {
9118 pr_err("unable to register input device\n");
9119 thinkpad_acpi_module_exit();
9120 return ret;
9121 } else {
9122 tp_features.input_device_registered = 1;
9123 }
9124
9125 return 0;
9126 }
9127
9128 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
9129
9130 /*
9131 * This will autoload the driver in almost every ThinkPad
9132 * in widespread use.
9133 *
9134 * Only _VERY_ old models, like the 240, 240x and 570 lack
9135 * the HKEY event interface.
9136 */
9137 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
9138
9139 /*
9140 * DMI matching for module autoloading
9141 *
9142 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9143 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
9144 *
9145 * Only models listed in thinkwiki will be supported, so add yours
9146 * if it is not there yet.
9147 */
9148 #define IBM_BIOS_MODULE_ALIAS(__type) \
9149 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
9150
9151 /* Ancient thinkpad BIOSes have to be identified by
9152 * BIOS type or model number, and there are far less
9153 * BIOS types than model numbers... */
9154 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
9155
9156 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
9157 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
9158 MODULE_DESCRIPTION(TPACPI_DESC);
9159 MODULE_VERSION(TPACPI_VERSION);
9160 MODULE_LICENSE("GPL");
9161
9162 module_init(thinkpad_acpi_module_init);
9163 module_exit(thinkpad_acpi_module_exit);
9164