1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Device driver for the via-pmu on Apple Powermacs.
4 *
5 * The VIA (versatile interface adapter) interfaces to the PMU,
6 * a 6805 microprocessor core whose primary function is to control
7 * battery charging and system power on the PowerBook 3400 and 2400.
8 * The PMU also controls the ADB (Apple Desktop Bus) which connects
9 * to the keyboard and mouse, as well as the non-volatile RAM
10 * and the RTC (real time clock) chip.
11 *
12 * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
13 * Copyright (C) 2001-2002 Benjamin Herrenschmidt
14 * Copyright (C) 2006-2007 Johannes Berg
15 *
16 * THIS DRIVER IS BECOMING A TOTAL MESS !
17 * - Cleanup atomically disabling reply to PMU events after
18 * a sleep or a freq. switch
19 *
20 */
21 #include <stdarg.h>
22 #include <linux/mutex.h>
23 #include <linux/types.h>
24 #include <linux/errno.h>
25 #include <linux/kernel.h>
26 #include <linux/delay.h>
27 #include <linux/sched/signal.h>
28 #include <linux/miscdevice.h>
29 #include <linux/blkdev.h>
30 #include <linux/pci.h>
31 #include <linux/slab.h>
32 #include <linux/poll.h>
33 #include <linux/adb.h>
34 #include <linux/pmu.h>
35 #include <linux/cuda.h>
36 #include <linux/module.h>
37 #include <linux/spinlock.h>
38 #include <linux/pm.h>
39 #include <linux/proc_fs.h>
40 #include <linux/seq_file.h>
41 #include <linux/init.h>
42 #include <linux/interrupt.h>
43 #include <linux/device.h>
44 #include <linux/syscore_ops.h>
45 #include <linux/freezer.h>
46 #include <linux/syscalls.h>
47 #include <linux/suspend.h>
48 #include <linux/cpu.h>
49 #include <linux/compat.h>
50 #include <linux/of_address.h>
51 #include <linux/of_irq.h>
52 #include <asm/prom.h>
53 #include <asm/machdep.h>
54 #include <asm/io.h>
55 #include <asm/pgtable.h>
56 #include <asm/sections.h>
57 #include <asm/irq.h>
58 #include <asm/pmac_feature.h>
59 #include <asm/pmac_pfunc.h>
60 #include <asm/pmac_low_i2c.h>
61 #include <linux/uaccess.h>
62 #include <asm/mmu_context.h>
63 #include <asm/cputable.h>
64 #include <asm/time.h>
65 #include <asm/backlight.h>
66
67 #include "via-pmu-event.h"
68
69 /* Some compile options */
70 #undef DEBUG_SLEEP
71
72 /* Misc minor number allocated for /dev/pmu */
73 #define PMU_MINOR 154
74
75 /* How many iterations between battery polls */
76 #define BATTERY_POLLING_COUNT 2
77
78 static DEFINE_MUTEX(pmu_info_proc_mutex);
79 static volatile unsigned char __iomem *via;
80
81 /* VIA registers - spaced 0x200 bytes apart */
82 #define RS 0x200 /* skip between registers */
83 #define B 0 /* B-side data */
84 #define A RS /* A-side data */
85 #define DIRB (2*RS) /* B-side direction (1=output) */
86 #define DIRA (3*RS) /* A-side direction (1=output) */
87 #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */
88 #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */
89 #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */
90 #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */
91 #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */
92 #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */
93 #define SR (10*RS) /* Shift register */
94 #define ACR (11*RS) /* Auxiliary control register */
95 #define PCR (12*RS) /* Peripheral control register */
96 #define IFR (13*RS) /* Interrupt flag register */
97 #define IER (14*RS) /* Interrupt enable register */
98 #define ANH (15*RS) /* A-side data, no handshake */
99
100 /* Bits in B data register: both active low */
101 #define TACK 0x08 /* Transfer acknowledge (input) */
102 #define TREQ 0x10 /* Transfer request (output) */
103
104 /* Bits in ACR */
105 #define SR_CTRL 0x1c /* Shift register control bits */
106 #define SR_EXT 0x0c /* Shift on external clock */
107 #define SR_OUT 0x10 /* Shift out if 1 */
108
109 /* Bits in IFR and IER */
110 #define IER_SET 0x80 /* set bits in IER */
111 #define IER_CLR 0 /* clear bits in IER */
112 #define SR_INT 0x04 /* Shift register full/empty */
113 #define CB2_INT 0x08
114 #define CB1_INT 0x10 /* transition on CB1 input */
115
116 static volatile enum pmu_state {
117 idle,
118 sending,
119 intack,
120 reading,
121 reading_intr,
122 locked,
123 } pmu_state;
124
125 static volatile enum int_data_state {
126 int_data_empty,
127 int_data_fill,
128 int_data_ready,
129 int_data_flush
130 } int_data_state[2] = { int_data_empty, int_data_empty };
131
132 static struct adb_request *current_req;
133 static struct adb_request *last_req;
134 static struct adb_request *req_awaiting_reply;
135 static unsigned char interrupt_data[2][32];
136 static int interrupt_data_len[2];
137 static int int_data_last;
138 static unsigned char *reply_ptr;
139 static int data_index;
140 static int data_len;
141 static volatile int adb_int_pending;
142 static volatile int disable_poll;
143 static struct device_node *vias;
144 static int pmu_kind = PMU_UNKNOWN;
145 static int pmu_fully_inited;
146 static int pmu_has_adb;
147 static struct device_node *gpio_node;
148 static unsigned char __iomem *gpio_reg;
149 static int gpio_irq = 0;
150 static int gpio_irq_enabled = -1;
151 static volatile int pmu_suspended;
152 static spinlock_t pmu_lock;
153 static u8 pmu_intr_mask;
154 static int pmu_version;
155 static int drop_interrupts;
156 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
157 static int option_lid_wakeup = 1;
158 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
159 static unsigned long async_req_locks;
160 static unsigned int pmu_irq_stats[11];
161
162 static struct proc_dir_entry *proc_pmu_root;
163 static struct proc_dir_entry *proc_pmu_info;
164 static struct proc_dir_entry *proc_pmu_irqstats;
165 static struct proc_dir_entry *proc_pmu_options;
166 static int option_server_mode;
167
168 int pmu_battery_count;
169 int pmu_cur_battery;
170 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
171 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
172 static int query_batt_timer = BATTERY_POLLING_COUNT;
173 static struct adb_request batt_req;
174 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
175
176 int __fake_sleep;
177 int asleep;
178
179 #ifdef CONFIG_ADB
180 static int adb_dev_map;
181 static int pmu_adb_flags;
182
183 static int pmu_probe(void);
184 static int pmu_init(void);
185 static int pmu_send_request(struct adb_request *req, int sync);
186 static int pmu_adb_autopoll(int devs);
187 static int pmu_adb_reset_bus(void);
188 #endif /* CONFIG_ADB */
189
190 static int init_pmu(void);
191 static void pmu_start(void);
192 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
193 static irqreturn_t gpio1_interrupt(int irq, void *arg);
194 static const struct file_operations pmu_info_proc_fops;
195 static const struct file_operations pmu_irqstats_proc_fops;
196 static void pmu_pass_intr(unsigned char *data, int len);
197 static const struct file_operations pmu_battery_proc_fops;
198 static const struct file_operations pmu_options_proc_fops;
199
200 #ifdef CONFIG_ADB
201 struct adb_driver via_pmu_driver = {
202 "PMU",
203 pmu_probe,
204 pmu_init,
205 pmu_send_request,
206 pmu_adb_autopoll,
207 pmu_poll_adb,
208 pmu_adb_reset_bus
209 };
210 #endif /* CONFIG_ADB */
211
212 extern void low_sleep_handler(void);
213 extern void enable_kernel_altivec(void);
214 extern void enable_kernel_fp(void);
215
216 #ifdef DEBUG_SLEEP
217 int pmu_polled_request(struct adb_request *req);
218 void pmu_blink(int n);
219 #endif
220
221 /*
222 * This table indicates for each PMU opcode:
223 * - the number of data bytes to be sent with the command, or -1
224 * if a length byte should be sent,
225 * - the number of response bytes which the PMU will return, or
226 * -1 if it will send a length byte.
227 */
228 static const s8 pmu_data_len[256][2] = {
229 /* 0 1 2 3 4 5 6 7 */
230 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
231 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
232 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
233 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
234 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
235 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
236 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
237 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
238 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
239 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
240 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
241 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
242 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
243 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
244 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
245 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
246 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
247 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
248 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
249 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
250 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
251 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
252 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
253 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
254 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
255 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
256 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
257 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
258 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
259 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
260 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
261 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
262 };
263
264 static char *pbook_type[] = {
265 "Unknown PowerBook",
266 "PowerBook 2400/3400/3500(G3)",
267 "PowerBook G3 Series",
268 "1999 PowerBook G3",
269 "Core99"
270 };
271
find_via_pmu(void)272 int __init find_via_pmu(void)
273 {
274 u64 taddr;
275 const u32 *reg;
276
277 if (via != 0)
278 return 1;
279 vias = of_find_node_by_name(NULL, "via-pmu");
280 if (vias == NULL)
281 return 0;
282
283 reg = of_get_property(vias, "reg", NULL);
284 if (reg == NULL) {
285 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
286 goto fail;
287 }
288 taddr = of_translate_address(vias, reg);
289 if (taddr == OF_BAD_ADDR) {
290 printk(KERN_ERR "via-pmu: Can't translate address !\n");
291 goto fail;
292 }
293
294 spin_lock_init(&pmu_lock);
295
296 pmu_has_adb = 1;
297
298 pmu_intr_mask = PMU_INT_PCEJECT |
299 PMU_INT_SNDBRT |
300 PMU_INT_ADB |
301 PMU_INT_TICK;
302
303 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
304 || of_device_is_compatible(vias->parent, "ohare")))
305 pmu_kind = PMU_OHARE_BASED;
306 else if (of_device_is_compatible(vias->parent, "paddington"))
307 pmu_kind = PMU_PADDINGTON_BASED;
308 else if (of_device_is_compatible(vias->parent, "heathrow"))
309 pmu_kind = PMU_HEATHROW_BASED;
310 else if (of_device_is_compatible(vias->parent, "Keylargo")
311 || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
312 struct device_node *gpiop;
313 struct device_node *adbp;
314 u64 gaddr = OF_BAD_ADDR;
315
316 pmu_kind = PMU_KEYLARGO_BASED;
317 adbp = of_find_node_by_type(NULL, "adb");
318 pmu_has_adb = (adbp != NULL);
319 of_node_put(adbp);
320 pmu_intr_mask = PMU_INT_PCEJECT |
321 PMU_INT_SNDBRT |
322 PMU_INT_ADB |
323 PMU_INT_TICK |
324 PMU_INT_ENVIRONMENT;
325
326 gpiop = of_find_node_by_name(NULL, "gpio");
327 if (gpiop) {
328 reg = of_get_property(gpiop, "reg", NULL);
329 if (reg)
330 gaddr = of_translate_address(gpiop, reg);
331 if (gaddr != OF_BAD_ADDR)
332 gpio_reg = ioremap(gaddr, 0x10);
333 of_node_put(gpiop);
334 }
335 if (gpio_reg == NULL) {
336 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
337 goto fail;
338 }
339 } else
340 pmu_kind = PMU_UNKNOWN;
341
342 via = ioremap(taddr, 0x2000);
343 if (via == NULL) {
344 printk(KERN_ERR "via-pmu: Can't map address !\n");
345 goto fail_via_remap;
346 }
347
348 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
349 out_8(&via[IFR], 0x7f); /* clear IFR */
350
351 pmu_state = idle;
352
353 if (!init_pmu())
354 goto fail_init;
355
356 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
357 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
358
359 sys_ctrler = SYS_CTRLER_PMU;
360
361 return 1;
362
363 fail_init:
364 iounmap(via);
365 via = NULL;
366 fail_via_remap:
367 iounmap(gpio_reg);
368 gpio_reg = NULL;
369 fail:
370 of_node_put(vias);
371 vias = NULL;
372 return 0;
373 }
374
375 #ifdef CONFIG_ADB
pmu_probe(void)376 static int pmu_probe(void)
377 {
378 return vias == NULL? -ENODEV: 0;
379 }
380
pmu_init(void)381 static int __init pmu_init(void)
382 {
383 if (vias == NULL)
384 return -ENODEV;
385 return 0;
386 }
387 #endif /* CONFIG_ADB */
388
389 /*
390 * We can't wait until pmu_init gets called, that happens too late.
391 * It happens after IDE and SCSI initialization, which can take a few
392 * seconds, and by that time the PMU could have given up on us and
393 * turned us off.
394 * Thus this is called with arch_initcall rather than device_initcall.
395 */
via_pmu_start(void)396 static int __init via_pmu_start(void)
397 {
398 unsigned int irq;
399
400 if (vias == NULL)
401 return -ENODEV;
402
403 batt_req.complete = 1;
404
405 irq = irq_of_parse_and_map(vias, 0);
406 if (!irq) {
407 printk(KERN_ERR "via-pmu: can't map interrupt\n");
408 return -ENODEV;
409 }
410 /* We set IRQF_NO_SUSPEND because we don't want the interrupt
411 * to be disabled between the 2 passes of driver suspend, we
412 * control our own disabling for that one
413 */
414 if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
415 "VIA-PMU", (void *)0)) {
416 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
417 return -ENODEV;
418 }
419
420 if (pmu_kind == PMU_KEYLARGO_BASED) {
421 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
422 if (gpio_node == NULL)
423 gpio_node = of_find_node_by_name(NULL,
424 "pmu-interrupt");
425 if (gpio_node)
426 gpio_irq = irq_of_parse_and_map(gpio_node, 0);
427
428 if (gpio_irq) {
429 if (request_irq(gpio_irq, gpio1_interrupt,
430 IRQF_NO_SUSPEND, "GPIO1 ADB",
431 (void *)0))
432 printk(KERN_ERR "pmu: can't get irq %d"
433 " (GPIO1)\n", gpio_irq);
434 else
435 gpio_irq_enabled = 1;
436 }
437 }
438
439 /* Enable interrupts */
440 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
441
442 pmu_fully_inited = 1;
443
444 /* Make sure PMU settle down before continuing. This is _very_ important
445 * since the IDE probe may shut interrupts down for quite a bit of time. If
446 * a PMU communication is pending while this happens, the PMU may timeout
447 * Not that on Core99 machines, the PMU keeps sending us environement
448 * messages, we should find a way to either fix IDE or make it call
449 * pmu_suspend() before masking interrupts. This can also happens while
450 * scolling with some fbdevs.
451 */
452 do {
453 pmu_poll();
454 } while (pmu_state != idle);
455
456 return 0;
457 }
458
459 arch_initcall(via_pmu_start);
460
461 /*
462 * This has to be done after pci_init, which is a subsys_initcall.
463 */
via_pmu_dev_init(void)464 static int __init via_pmu_dev_init(void)
465 {
466 if (vias == NULL)
467 return -ENODEV;
468
469 #ifdef CONFIG_PMAC_BACKLIGHT
470 /* Initialize backlight */
471 pmu_backlight_init();
472 #endif
473
474 #ifdef CONFIG_PPC32
475 if (of_machine_is_compatible("AAPL,3400/2400") ||
476 of_machine_is_compatible("AAPL,3500")) {
477 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
478 NULL, PMAC_MB_INFO_MODEL, 0);
479 pmu_battery_count = 1;
480 if (mb == PMAC_TYPE_COMET)
481 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
482 else
483 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
484 } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
485 of_machine_is_compatible("PowerBook1,1")) {
486 pmu_battery_count = 2;
487 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
488 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
489 } else {
490 struct device_node* prim =
491 of_find_node_by_name(NULL, "power-mgt");
492 const u32 *prim_info = NULL;
493 if (prim)
494 prim_info = of_get_property(prim, "prim-info", NULL);
495 if (prim_info) {
496 /* Other stuffs here yet unknown */
497 pmu_battery_count = (prim_info[6] >> 16) & 0xff;
498 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
499 if (pmu_battery_count > 1)
500 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
501 }
502 of_node_put(prim);
503 }
504 #endif /* CONFIG_PPC32 */
505
506 /* Create /proc/pmu */
507 proc_pmu_root = proc_mkdir("pmu", NULL);
508 if (proc_pmu_root) {
509 long i;
510
511 for (i=0; i<pmu_battery_count; i++) {
512 char title[16];
513 sprintf(title, "battery_%ld", i);
514 proc_pmu_batt[i] = proc_create_data(title, 0, proc_pmu_root,
515 &pmu_battery_proc_fops, (void *)i);
516 }
517
518 proc_pmu_info = proc_create("info", 0, proc_pmu_root, &pmu_info_proc_fops);
519 proc_pmu_irqstats = proc_create("interrupts", 0, proc_pmu_root,
520 &pmu_irqstats_proc_fops);
521 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
522 &pmu_options_proc_fops);
523 }
524 return 0;
525 }
526
527 device_initcall(via_pmu_dev_init);
528
529 static int
init_pmu(void)530 init_pmu(void)
531 {
532 int timeout;
533 struct adb_request req;
534
535 /* Negate TREQ. Set TACK to input and TREQ to output. */
536 out_8(&via[B], in_8(&via[B]) | TREQ);
537 out_8(&via[DIRB], (in_8(&via[DIRB]) | TREQ) & ~TACK);
538
539 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
540 timeout = 100000;
541 while (!req.complete) {
542 if (--timeout < 0) {
543 printk(KERN_ERR "init_pmu: no response from PMU\n");
544 return 0;
545 }
546 udelay(10);
547 pmu_poll();
548 }
549
550 /* ack all pending interrupts */
551 timeout = 100000;
552 interrupt_data[0][0] = 1;
553 while (interrupt_data[0][0] || pmu_state != idle) {
554 if (--timeout < 0) {
555 printk(KERN_ERR "init_pmu: timed out acking intrs\n");
556 return 0;
557 }
558 if (pmu_state == idle)
559 adb_int_pending = 1;
560 via_pmu_interrupt(0, NULL);
561 udelay(10);
562 }
563
564 /* Tell PMU we are ready. */
565 if (pmu_kind == PMU_KEYLARGO_BASED) {
566 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
567 while (!req.complete)
568 pmu_poll();
569 }
570
571 /* Read PMU version */
572 pmu_request(&req, NULL, 1, PMU_GET_VERSION);
573 pmu_wait_complete(&req);
574 if (req.reply_len > 0)
575 pmu_version = req.reply[0];
576
577 /* Read server mode setting */
578 if (pmu_kind == PMU_KEYLARGO_BASED) {
579 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
580 PMU_PWR_GET_POWERUP_EVENTS);
581 pmu_wait_complete(&req);
582 if (req.reply_len == 2) {
583 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
584 option_server_mode = 1;
585 printk(KERN_INFO "via-pmu: Server Mode is %s\n",
586 option_server_mode ? "enabled" : "disabled");
587 }
588 }
589 return 1;
590 }
591
592 int
pmu_get_model(void)593 pmu_get_model(void)
594 {
595 return pmu_kind;
596 }
597
pmu_set_server_mode(int server_mode)598 static void pmu_set_server_mode(int server_mode)
599 {
600 struct adb_request req;
601
602 if (pmu_kind != PMU_KEYLARGO_BASED)
603 return;
604
605 option_server_mode = server_mode;
606 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
607 pmu_wait_complete(&req);
608 if (req.reply_len < 2)
609 return;
610 if (server_mode)
611 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
612 PMU_PWR_SET_POWERUP_EVENTS,
613 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
614 else
615 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
616 PMU_PWR_CLR_POWERUP_EVENTS,
617 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
618 pmu_wait_complete(&req);
619 }
620
621 /* This new version of the code for 2400/3400/3500 powerbooks
622 * is inspired from the implementation in gkrellm-pmu
623 */
624 static void
done_battery_state_ohare(struct adb_request * req)625 done_battery_state_ohare(struct adb_request* req)
626 {
627 /* format:
628 * [0] : flags
629 * 0x01 : AC indicator
630 * 0x02 : charging
631 * 0x04 : battery exist
632 * 0x08 :
633 * 0x10 :
634 * 0x20 : full charged
635 * 0x40 : pcharge reset
636 * 0x80 : battery exist
637 *
638 * [1][2] : battery voltage
639 * [3] : CPU temperature
640 * [4] : battery temperature
641 * [5] : current
642 * [6][7] : pcharge
643 * --tkoba
644 */
645 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
646 long pcharge, charge, vb, vmax, lmax;
647 long vmax_charging, vmax_charged;
648 long amperage, voltage, time, max;
649 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
650 NULL, PMAC_MB_INFO_MODEL, 0);
651
652 if (req->reply[0] & 0x01)
653 pmu_power_flags |= PMU_PWR_AC_PRESENT;
654 else
655 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
656
657 if (mb == PMAC_TYPE_COMET) {
658 vmax_charged = 189;
659 vmax_charging = 213;
660 lmax = 6500;
661 } else {
662 vmax_charged = 330;
663 vmax_charging = 330;
664 lmax = 6500;
665 }
666 vmax = vmax_charged;
667
668 /* If battery installed */
669 if (req->reply[0] & 0x04) {
670 bat_flags |= PMU_BATT_PRESENT;
671 if (req->reply[0] & 0x02)
672 bat_flags |= PMU_BATT_CHARGING;
673 vb = (req->reply[1] << 8) | req->reply[2];
674 voltage = (vb * 265 + 72665) / 10;
675 amperage = req->reply[5];
676 if ((req->reply[0] & 0x01) == 0) {
677 if (amperage > 200)
678 vb += ((amperage - 200) * 15)/100;
679 } else if (req->reply[0] & 0x02) {
680 vb = (vb * 97) / 100;
681 vmax = vmax_charging;
682 }
683 charge = (100 * vb) / vmax;
684 if (req->reply[0] & 0x40) {
685 pcharge = (req->reply[6] << 8) + req->reply[7];
686 if (pcharge > lmax)
687 pcharge = lmax;
688 pcharge *= 100;
689 pcharge = 100 - pcharge / lmax;
690 if (pcharge < charge)
691 charge = pcharge;
692 }
693 if (amperage > 0)
694 time = (charge * 16440) / amperage;
695 else
696 time = 0;
697 max = 100;
698 amperage = -amperage;
699 } else
700 charge = max = amperage = voltage = time = 0;
701
702 pmu_batteries[pmu_cur_battery].flags = bat_flags;
703 pmu_batteries[pmu_cur_battery].charge = charge;
704 pmu_batteries[pmu_cur_battery].max_charge = max;
705 pmu_batteries[pmu_cur_battery].amperage = amperage;
706 pmu_batteries[pmu_cur_battery].voltage = voltage;
707 pmu_batteries[pmu_cur_battery].time_remaining = time;
708
709 clear_bit(0, &async_req_locks);
710 }
711
712 static void
done_battery_state_smart(struct adb_request * req)713 done_battery_state_smart(struct adb_request* req)
714 {
715 /* format:
716 * [0] : format of this structure (known: 3,4,5)
717 * [1] : flags
718 *
719 * format 3 & 4:
720 *
721 * [2] : charge
722 * [3] : max charge
723 * [4] : current
724 * [5] : voltage
725 *
726 * format 5:
727 *
728 * [2][3] : charge
729 * [4][5] : max charge
730 * [6][7] : current
731 * [8][9] : voltage
732 */
733
734 unsigned int bat_flags = PMU_BATT_TYPE_SMART;
735 int amperage;
736 unsigned int capa, max, voltage;
737
738 if (req->reply[1] & 0x01)
739 pmu_power_flags |= PMU_PWR_AC_PRESENT;
740 else
741 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
742
743
744 capa = max = amperage = voltage = 0;
745
746 if (req->reply[1] & 0x04) {
747 bat_flags |= PMU_BATT_PRESENT;
748 switch(req->reply[0]) {
749 case 3:
750 case 4: capa = req->reply[2];
751 max = req->reply[3];
752 amperage = *((signed char *)&req->reply[4]);
753 voltage = req->reply[5];
754 break;
755 case 5: capa = (req->reply[2] << 8) | req->reply[3];
756 max = (req->reply[4] << 8) | req->reply[5];
757 amperage = *((signed short *)&req->reply[6]);
758 voltage = (req->reply[8] << 8) | req->reply[9];
759 break;
760 default:
761 pr_warn("pmu.c: unrecognized battery info, "
762 "len: %d, %4ph\n", req->reply_len,
763 req->reply);
764 break;
765 }
766 }
767
768 if ((req->reply[1] & 0x01) && (amperage > 0))
769 bat_flags |= PMU_BATT_CHARGING;
770
771 pmu_batteries[pmu_cur_battery].flags = bat_flags;
772 pmu_batteries[pmu_cur_battery].charge = capa;
773 pmu_batteries[pmu_cur_battery].max_charge = max;
774 pmu_batteries[pmu_cur_battery].amperage = amperage;
775 pmu_batteries[pmu_cur_battery].voltage = voltage;
776 if (amperage) {
777 if ((req->reply[1] & 0x01) && (amperage > 0))
778 pmu_batteries[pmu_cur_battery].time_remaining
779 = ((max-capa) * 3600) / amperage;
780 else
781 pmu_batteries[pmu_cur_battery].time_remaining
782 = (capa * 3600) / (-amperage);
783 } else
784 pmu_batteries[pmu_cur_battery].time_remaining = 0;
785
786 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
787
788 clear_bit(0, &async_req_locks);
789 }
790
791 static void
query_battery_state(void)792 query_battery_state(void)
793 {
794 if (test_and_set_bit(0, &async_req_locks))
795 return;
796 if (pmu_kind == PMU_OHARE_BASED)
797 pmu_request(&batt_req, done_battery_state_ohare,
798 1, PMU_BATTERY_STATE);
799 else
800 pmu_request(&batt_req, done_battery_state_smart,
801 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
802 }
803
pmu_info_proc_show(struct seq_file * m,void * v)804 static int pmu_info_proc_show(struct seq_file *m, void *v)
805 {
806 seq_printf(m, "PMU driver version : %d\n", PMU_DRIVER_VERSION);
807 seq_printf(m, "PMU firmware version : %02x\n", pmu_version);
808 seq_printf(m, "AC Power : %d\n",
809 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
810 seq_printf(m, "Battery count : %d\n", pmu_battery_count);
811
812 return 0;
813 }
814
pmu_info_proc_open(struct inode * inode,struct file * file)815 static int pmu_info_proc_open(struct inode *inode, struct file *file)
816 {
817 return single_open(file, pmu_info_proc_show, NULL);
818 }
819
820 static const struct file_operations pmu_info_proc_fops = {
821 .owner = THIS_MODULE,
822 .open = pmu_info_proc_open,
823 .read = seq_read,
824 .llseek = seq_lseek,
825 .release = single_release,
826 };
827
pmu_irqstats_proc_show(struct seq_file * m,void * v)828 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
829 {
830 int i;
831 static const char *irq_names[] = {
832 "Total CB1 triggered events",
833 "Total GPIO1 triggered events",
834 "PC-Card eject button",
835 "Sound/Brightness button",
836 "ADB message",
837 "Battery state change",
838 "Environment interrupt",
839 "Tick timer",
840 "Ghost interrupt (zero len)",
841 "Empty interrupt (empty mask)",
842 "Max irqs in a row"
843 };
844
845 for (i=0; i<11; i++) {
846 seq_printf(m, " %2u: %10u (%s)\n",
847 i, pmu_irq_stats[i], irq_names[i]);
848 }
849 return 0;
850 }
851
pmu_irqstats_proc_open(struct inode * inode,struct file * file)852 static int pmu_irqstats_proc_open(struct inode *inode, struct file *file)
853 {
854 return single_open(file, pmu_irqstats_proc_show, NULL);
855 }
856
857 static const struct file_operations pmu_irqstats_proc_fops = {
858 .owner = THIS_MODULE,
859 .open = pmu_irqstats_proc_open,
860 .read = seq_read,
861 .llseek = seq_lseek,
862 .release = single_release,
863 };
864
pmu_battery_proc_show(struct seq_file * m,void * v)865 static int pmu_battery_proc_show(struct seq_file *m, void *v)
866 {
867 long batnum = (long)m->private;
868
869 seq_putc(m, '\n');
870 seq_printf(m, "flags : %08x\n", pmu_batteries[batnum].flags);
871 seq_printf(m, "charge : %d\n", pmu_batteries[batnum].charge);
872 seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
873 seq_printf(m, "current : %d\n", pmu_batteries[batnum].amperage);
874 seq_printf(m, "voltage : %d\n", pmu_batteries[batnum].voltage);
875 seq_printf(m, "time rem. : %d\n", pmu_batteries[batnum].time_remaining);
876 return 0;
877 }
878
pmu_battery_proc_open(struct inode * inode,struct file * file)879 static int pmu_battery_proc_open(struct inode *inode, struct file *file)
880 {
881 return single_open(file, pmu_battery_proc_show, PDE_DATA(inode));
882 }
883
884 static const struct file_operations pmu_battery_proc_fops = {
885 .owner = THIS_MODULE,
886 .open = pmu_battery_proc_open,
887 .read = seq_read,
888 .llseek = seq_lseek,
889 .release = single_release,
890 };
891
pmu_options_proc_show(struct seq_file * m,void * v)892 static int pmu_options_proc_show(struct seq_file *m, void *v)
893 {
894 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
895 if (pmu_kind == PMU_KEYLARGO_BASED &&
896 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
897 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
898 #endif
899 if (pmu_kind == PMU_KEYLARGO_BASED)
900 seq_printf(m, "server_mode=%d\n", option_server_mode);
901
902 return 0;
903 }
904
pmu_options_proc_open(struct inode * inode,struct file * file)905 static int pmu_options_proc_open(struct inode *inode, struct file *file)
906 {
907 return single_open(file, pmu_options_proc_show, NULL);
908 }
909
pmu_options_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * pos)910 static ssize_t pmu_options_proc_write(struct file *file,
911 const char __user *buffer, size_t count, loff_t *pos)
912 {
913 char tmp[33];
914 char *label, *val;
915 size_t fcount = count;
916
917 if (!count)
918 return -EINVAL;
919 if (count > 32)
920 count = 32;
921 if (copy_from_user(tmp, buffer, count))
922 return -EFAULT;
923 tmp[count] = 0;
924
925 label = tmp;
926 while(*label == ' ')
927 label++;
928 val = label;
929 while(*val && (*val != '=')) {
930 if (*val == ' ')
931 *val = 0;
932 val++;
933 }
934 if ((*val) == 0)
935 return -EINVAL;
936 *(val++) = 0;
937 while(*val == ' ')
938 val++;
939 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
940 if (pmu_kind == PMU_KEYLARGO_BASED &&
941 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
942 if (!strcmp(label, "lid_wakeup"))
943 option_lid_wakeup = ((*val) == '1');
944 #endif
945 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
946 int new_value;
947 new_value = ((*val) == '1');
948 if (new_value != option_server_mode)
949 pmu_set_server_mode(new_value);
950 }
951 return fcount;
952 }
953
954 static const struct file_operations pmu_options_proc_fops = {
955 .owner = THIS_MODULE,
956 .open = pmu_options_proc_open,
957 .read = seq_read,
958 .llseek = seq_lseek,
959 .release = single_release,
960 .write = pmu_options_proc_write,
961 };
962
963 #ifdef CONFIG_ADB
964 /* Send an ADB command */
pmu_send_request(struct adb_request * req,int sync)965 static int pmu_send_request(struct adb_request *req, int sync)
966 {
967 int i, ret;
968
969 if ((vias == NULL) || (!pmu_fully_inited)) {
970 req->complete = 1;
971 return -ENXIO;
972 }
973
974 ret = -EINVAL;
975
976 switch (req->data[0]) {
977 case PMU_PACKET:
978 for (i = 0; i < req->nbytes - 1; ++i)
979 req->data[i] = req->data[i+1];
980 --req->nbytes;
981 if (pmu_data_len[req->data[0]][1] != 0) {
982 req->reply[0] = ADB_RET_OK;
983 req->reply_len = 1;
984 } else
985 req->reply_len = 0;
986 ret = pmu_queue_request(req);
987 break;
988 case CUDA_PACKET:
989 switch (req->data[1]) {
990 case CUDA_GET_TIME:
991 if (req->nbytes != 2)
992 break;
993 req->data[0] = PMU_READ_RTC;
994 req->nbytes = 1;
995 req->reply_len = 3;
996 req->reply[0] = CUDA_PACKET;
997 req->reply[1] = 0;
998 req->reply[2] = CUDA_GET_TIME;
999 ret = pmu_queue_request(req);
1000 break;
1001 case CUDA_SET_TIME:
1002 if (req->nbytes != 6)
1003 break;
1004 req->data[0] = PMU_SET_RTC;
1005 req->nbytes = 5;
1006 for (i = 1; i <= 4; ++i)
1007 req->data[i] = req->data[i+1];
1008 req->reply_len = 3;
1009 req->reply[0] = CUDA_PACKET;
1010 req->reply[1] = 0;
1011 req->reply[2] = CUDA_SET_TIME;
1012 ret = pmu_queue_request(req);
1013 break;
1014 }
1015 break;
1016 case ADB_PACKET:
1017 if (!pmu_has_adb)
1018 return -ENXIO;
1019 for (i = req->nbytes - 1; i > 1; --i)
1020 req->data[i+2] = req->data[i];
1021 req->data[3] = req->nbytes - 2;
1022 req->data[2] = pmu_adb_flags;
1023 /*req->data[1] = req->data[1];*/
1024 req->data[0] = PMU_ADB_CMD;
1025 req->nbytes += 2;
1026 req->reply_expected = 1;
1027 req->reply_len = 0;
1028 ret = pmu_queue_request(req);
1029 break;
1030 }
1031 if (ret) {
1032 req->complete = 1;
1033 return ret;
1034 }
1035
1036 if (sync)
1037 while (!req->complete)
1038 pmu_poll();
1039
1040 return 0;
1041 }
1042
1043 /* Enable/disable autopolling */
__pmu_adb_autopoll(int devs)1044 static int __pmu_adb_autopoll(int devs)
1045 {
1046 struct adb_request req;
1047
1048 if (devs) {
1049 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1050 adb_dev_map >> 8, adb_dev_map);
1051 pmu_adb_flags = 2;
1052 } else {
1053 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1054 pmu_adb_flags = 0;
1055 }
1056 while (!req.complete)
1057 pmu_poll();
1058 return 0;
1059 }
1060
pmu_adb_autopoll(int devs)1061 static int pmu_adb_autopoll(int devs)
1062 {
1063 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1064 return -ENXIO;
1065
1066 adb_dev_map = devs;
1067 return __pmu_adb_autopoll(devs);
1068 }
1069
1070 /* Reset the ADB bus */
pmu_adb_reset_bus(void)1071 static int pmu_adb_reset_bus(void)
1072 {
1073 struct adb_request req;
1074 int save_autopoll = adb_dev_map;
1075
1076 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1077 return -ENXIO;
1078
1079 /* anyone got a better idea?? */
1080 __pmu_adb_autopoll(0);
1081
1082 req.nbytes = 4;
1083 req.done = NULL;
1084 req.data[0] = PMU_ADB_CMD;
1085 req.data[1] = ADB_BUSRESET;
1086 req.data[2] = 0;
1087 req.data[3] = 0;
1088 req.data[4] = 0;
1089 req.reply_len = 0;
1090 req.reply_expected = 1;
1091 if (pmu_queue_request(&req) != 0) {
1092 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1093 return -EIO;
1094 }
1095 pmu_wait_complete(&req);
1096
1097 if (save_autopoll != 0)
1098 __pmu_adb_autopoll(save_autopoll);
1099
1100 return 0;
1101 }
1102 #endif /* CONFIG_ADB */
1103
1104 /* Construct and send a pmu request */
1105 int
pmu_request(struct adb_request * req,void (* done)(struct adb_request *),int nbytes,...)1106 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1107 int nbytes, ...)
1108 {
1109 va_list list;
1110 int i;
1111
1112 if (vias == NULL)
1113 return -ENXIO;
1114
1115 if (nbytes < 0 || nbytes > 32) {
1116 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1117 req->complete = 1;
1118 return -EINVAL;
1119 }
1120 req->nbytes = nbytes;
1121 req->done = done;
1122 va_start(list, nbytes);
1123 for (i = 0; i < nbytes; ++i)
1124 req->data[i] = va_arg(list, int);
1125 va_end(list);
1126 req->reply_len = 0;
1127 req->reply_expected = 0;
1128 return pmu_queue_request(req);
1129 }
1130
1131 int
pmu_queue_request(struct adb_request * req)1132 pmu_queue_request(struct adb_request *req)
1133 {
1134 unsigned long flags;
1135 int nsend;
1136
1137 if (via == NULL) {
1138 req->complete = 1;
1139 return -ENXIO;
1140 }
1141 if (req->nbytes <= 0) {
1142 req->complete = 1;
1143 return 0;
1144 }
1145 nsend = pmu_data_len[req->data[0]][0];
1146 if (nsend >= 0 && req->nbytes != nsend + 1) {
1147 req->complete = 1;
1148 return -EINVAL;
1149 }
1150
1151 req->next = NULL;
1152 req->sent = 0;
1153 req->complete = 0;
1154
1155 spin_lock_irqsave(&pmu_lock, flags);
1156 if (current_req != 0) {
1157 last_req->next = req;
1158 last_req = req;
1159 } else {
1160 current_req = req;
1161 last_req = req;
1162 if (pmu_state == idle)
1163 pmu_start();
1164 }
1165 spin_unlock_irqrestore(&pmu_lock, flags);
1166
1167 return 0;
1168 }
1169
1170 static inline void
wait_for_ack(void)1171 wait_for_ack(void)
1172 {
1173 /* Sightly increased the delay, I had one occurrence of the message
1174 * reported
1175 */
1176 int timeout = 4000;
1177 while ((in_8(&via[B]) & TACK) == 0) {
1178 if (--timeout < 0) {
1179 printk(KERN_ERR "PMU not responding (!ack)\n");
1180 return;
1181 }
1182 udelay(10);
1183 }
1184 }
1185
1186 /* New PMU seems to be very sensitive to those timings, so we make sure
1187 * PCI is flushed immediately */
1188 static inline void
send_byte(int x)1189 send_byte(int x)
1190 {
1191 volatile unsigned char __iomem *v = via;
1192
1193 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1194 out_8(&v[SR], x);
1195 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */
1196 (void)in_8(&v[B]);
1197 }
1198
1199 static inline void
recv_byte(void)1200 recv_byte(void)
1201 {
1202 volatile unsigned char __iomem *v = via;
1203
1204 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1205 in_8(&v[SR]); /* resets SR */
1206 out_8(&v[B], in_8(&v[B]) & ~TREQ);
1207 (void)in_8(&v[B]);
1208 }
1209
1210 static inline void
pmu_done(struct adb_request * req)1211 pmu_done(struct adb_request *req)
1212 {
1213 void (*done)(struct adb_request *) = req->done;
1214 mb();
1215 req->complete = 1;
1216 /* Here, we assume that if the request has a done member, the
1217 * struct request will survive to setting req->complete to 1
1218 */
1219 if (done)
1220 (*done)(req);
1221 }
1222
1223 static void
pmu_start(void)1224 pmu_start(void)
1225 {
1226 struct adb_request *req;
1227
1228 /* assert pmu_state == idle */
1229 /* get the packet to send */
1230 req = current_req;
1231 if (req == 0 || pmu_state != idle
1232 || (/*req->reply_expected && */req_awaiting_reply))
1233 return;
1234
1235 pmu_state = sending;
1236 data_index = 1;
1237 data_len = pmu_data_len[req->data[0]][0];
1238
1239 /* Sounds safer to make sure ACK is high before writing. This helped
1240 * kill a problem with ADB and some iBooks
1241 */
1242 wait_for_ack();
1243 /* set the shift register to shift out and send a byte */
1244 send_byte(req->data[0]);
1245 }
1246
1247 void
pmu_poll(void)1248 pmu_poll(void)
1249 {
1250 if (!via)
1251 return;
1252 if (disable_poll)
1253 return;
1254 via_pmu_interrupt(0, NULL);
1255 }
1256
1257 void
pmu_poll_adb(void)1258 pmu_poll_adb(void)
1259 {
1260 if (!via)
1261 return;
1262 if (disable_poll)
1263 return;
1264 /* Kicks ADB read when PMU is suspended */
1265 adb_int_pending = 1;
1266 do {
1267 via_pmu_interrupt(0, NULL);
1268 } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1269 || req_awaiting_reply));
1270 }
1271
1272 void
pmu_wait_complete(struct adb_request * req)1273 pmu_wait_complete(struct adb_request *req)
1274 {
1275 if (!via)
1276 return;
1277 while((pmu_state != idle && pmu_state != locked) || !req->complete)
1278 via_pmu_interrupt(0, NULL);
1279 }
1280
1281 /* This function loops until the PMU is idle and prevents it from
1282 * anwsering to ADB interrupts. pmu_request can still be called.
1283 * This is done to avoid spurrious shutdowns when we know we'll have
1284 * interrupts switched off for a long time
1285 */
1286 void
pmu_suspend(void)1287 pmu_suspend(void)
1288 {
1289 unsigned long flags;
1290
1291 if (!via)
1292 return;
1293
1294 spin_lock_irqsave(&pmu_lock, flags);
1295 pmu_suspended++;
1296 if (pmu_suspended > 1) {
1297 spin_unlock_irqrestore(&pmu_lock, flags);
1298 return;
1299 }
1300
1301 do {
1302 spin_unlock_irqrestore(&pmu_lock, flags);
1303 if (req_awaiting_reply)
1304 adb_int_pending = 1;
1305 via_pmu_interrupt(0, NULL);
1306 spin_lock_irqsave(&pmu_lock, flags);
1307 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1308 if (gpio_irq >= 0)
1309 disable_irq_nosync(gpio_irq);
1310 out_8(&via[IER], CB1_INT | IER_CLR);
1311 spin_unlock_irqrestore(&pmu_lock, flags);
1312 break;
1313 }
1314 } while (1);
1315 }
1316
1317 void
pmu_resume(void)1318 pmu_resume(void)
1319 {
1320 unsigned long flags;
1321
1322 if (!via || (pmu_suspended < 1))
1323 return;
1324
1325 spin_lock_irqsave(&pmu_lock, flags);
1326 pmu_suspended--;
1327 if (pmu_suspended > 0) {
1328 spin_unlock_irqrestore(&pmu_lock, flags);
1329 return;
1330 }
1331 adb_int_pending = 1;
1332 if (gpio_irq >= 0)
1333 enable_irq(gpio_irq);
1334 out_8(&via[IER], CB1_INT | IER_SET);
1335 spin_unlock_irqrestore(&pmu_lock, flags);
1336 pmu_poll();
1337 }
1338
1339 /* Interrupt data could be the result data from an ADB cmd */
1340 static void
pmu_handle_data(unsigned char * data,int len)1341 pmu_handle_data(unsigned char *data, int len)
1342 {
1343 unsigned char ints, pirq;
1344 int i = 0;
1345
1346 asleep = 0;
1347 if (drop_interrupts || len < 1) {
1348 adb_int_pending = 0;
1349 pmu_irq_stats[8]++;
1350 return;
1351 }
1352
1353 /* Get PMU interrupt mask */
1354 ints = data[0];
1355
1356 /* Record zero interrupts for stats */
1357 if (ints == 0)
1358 pmu_irq_stats[9]++;
1359
1360 /* Hack to deal with ADB autopoll flag */
1361 if (ints & PMU_INT_ADB)
1362 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1363
1364 next:
1365
1366 if (ints == 0) {
1367 if (i > pmu_irq_stats[10])
1368 pmu_irq_stats[10] = i;
1369 return;
1370 }
1371
1372 for (pirq = 0; pirq < 8; pirq++)
1373 if (ints & (1 << pirq))
1374 break;
1375 pmu_irq_stats[pirq]++;
1376 i++;
1377 ints &= ~(1 << pirq);
1378
1379 /* Note: for some reason, we get an interrupt with len=1,
1380 * data[0]==0 after each normal ADB interrupt, at least
1381 * on the Pismo. Still investigating... --BenH
1382 */
1383 if ((1 << pirq) & PMU_INT_ADB) {
1384 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1385 struct adb_request *req = req_awaiting_reply;
1386 if (req == 0) {
1387 printk(KERN_ERR "PMU: extra ADB reply\n");
1388 return;
1389 }
1390 req_awaiting_reply = NULL;
1391 if (len <= 2)
1392 req->reply_len = 0;
1393 else {
1394 memcpy(req->reply, data + 1, len - 1);
1395 req->reply_len = len - 1;
1396 }
1397 pmu_done(req);
1398 } else {
1399 if (len == 4 && data[1] == 0x2c) {
1400 extern int xmon_wants_key, xmon_adb_keycode;
1401 if (xmon_wants_key) {
1402 xmon_adb_keycode = data[2];
1403 return;
1404 }
1405 }
1406 #ifdef CONFIG_ADB
1407 /*
1408 * XXX On the [23]400 the PMU gives us an up
1409 * event for keycodes 0x74 or 0x75 when the PC
1410 * card eject buttons are released, so we
1411 * ignore those events.
1412 */
1413 if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1414 && data[1] == 0x2c && data[3] == 0xff
1415 && (data[2] & ~1) == 0xf4))
1416 adb_input(data+1, len-1, 1);
1417 #endif /* CONFIG_ADB */
1418 }
1419 }
1420 /* Sound/brightness button pressed */
1421 else if ((1 << pirq) & PMU_INT_SNDBRT) {
1422 #ifdef CONFIG_PMAC_BACKLIGHT
1423 if (len == 3)
1424 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1425 #endif
1426 }
1427 /* Tick interrupt */
1428 else if ((1 << pirq) & PMU_INT_TICK) {
1429 /* Environement or tick interrupt, query batteries */
1430 if (pmu_battery_count) {
1431 if ((--query_batt_timer) == 0) {
1432 query_battery_state();
1433 query_batt_timer = BATTERY_POLLING_COUNT;
1434 }
1435 }
1436 }
1437 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1438 if (pmu_battery_count)
1439 query_battery_state();
1440 pmu_pass_intr(data, len);
1441 /* len == 6 is probably a bad check. But how do I
1442 * know what PMU versions send what events here? */
1443 if (len == 6) {
1444 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1445 via_pmu_event(PMU_EVT_LID, data[1]&1);
1446 }
1447 } else {
1448 pmu_pass_intr(data, len);
1449 }
1450 goto next;
1451 }
1452
1453 static struct adb_request*
pmu_sr_intr(void)1454 pmu_sr_intr(void)
1455 {
1456 struct adb_request *req;
1457 int bite = 0;
1458
1459 if (in_8(&via[B]) & TREQ) {
1460 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", in_8(&via[B]));
1461 out_8(&via[IFR], SR_INT);
1462 return NULL;
1463 }
1464 /* The ack may not yet be low when we get the interrupt */
1465 while ((in_8(&via[B]) & TACK) != 0)
1466 ;
1467
1468 /* if reading grab the byte, and reset the interrupt */
1469 if (pmu_state == reading || pmu_state == reading_intr)
1470 bite = in_8(&via[SR]);
1471
1472 /* reset TREQ and wait for TACK to go high */
1473 out_8(&via[B], in_8(&via[B]) | TREQ);
1474 wait_for_ack();
1475
1476 switch (pmu_state) {
1477 case sending:
1478 req = current_req;
1479 if (data_len < 0) {
1480 data_len = req->nbytes - 1;
1481 send_byte(data_len);
1482 break;
1483 }
1484 if (data_index <= data_len) {
1485 send_byte(req->data[data_index++]);
1486 break;
1487 }
1488 req->sent = 1;
1489 data_len = pmu_data_len[req->data[0]][1];
1490 if (data_len == 0) {
1491 pmu_state = idle;
1492 current_req = req->next;
1493 if (req->reply_expected)
1494 req_awaiting_reply = req;
1495 else
1496 return req;
1497 } else {
1498 pmu_state = reading;
1499 data_index = 0;
1500 reply_ptr = req->reply + req->reply_len;
1501 recv_byte();
1502 }
1503 break;
1504
1505 case intack:
1506 data_index = 0;
1507 data_len = -1;
1508 pmu_state = reading_intr;
1509 reply_ptr = interrupt_data[int_data_last];
1510 recv_byte();
1511 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1512 enable_irq(gpio_irq);
1513 gpio_irq_enabled = 1;
1514 }
1515 break;
1516
1517 case reading:
1518 case reading_intr:
1519 if (data_len == -1) {
1520 data_len = bite;
1521 if (bite > 32)
1522 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1523 } else if (data_index < 32) {
1524 reply_ptr[data_index++] = bite;
1525 }
1526 if (data_index < data_len) {
1527 recv_byte();
1528 break;
1529 }
1530
1531 if (pmu_state == reading_intr) {
1532 pmu_state = idle;
1533 int_data_state[int_data_last] = int_data_ready;
1534 interrupt_data_len[int_data_last] = data_len;
1535 } else {
1536 req = current_req;
1537 /*
1538 * For PMU sleep and freq change requests, we lock the
1539 * PMU until it's explicitly unlocked. This avoids any
1540 * spurrious event polling getting in
1541 */
1542 current_req = req->next;
1543 req->reply_len += data_index;
1544 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1545 pmu_state = locked;
1546 else
1547 pmu_state = idle;
1548 return req;
1549 }
1550 break;
1551
1552 default:
1553 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1554 pmu_state);
1555 }
1556 return NULL;
1557 }
1558
1559 static irqreturn_t
via_pmu_interrupt(int irq,void * arg)1560 via_pmu_interrupt(int irq, void *arg)
1561 {
1562 unsigned long flags;
1563 int intr;
1564 int nloop = 0;
1565 int int_data = -1;
1566 struct adb_request *req = NULL;
1567 int handled = 0;
1568
1569 /* This is a bit brutal, we can probably do better */
1570 spin_lock_irqsave(&pmu_lock, flags);
1571 ++disable_poll;
1572
1573 for (;;) {
1574 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1575 if (intr == 0)
1576 break;
1577 handled = 1;
1578 if (++nloop > 1000) {
1579 printk(KERN_DEBUG "PMU: stuck in intr loop, "
1580 "intr=%x, ier=%x pmu_state=%d\n",
1581 intr, in_8(&via[IER]), pmu_state);
1582 break;
1583 }
1584 out_8(&via[IFR], intr);
1585 if (intr & CB1_INT) {
1586 adb_int_pending = 1;
1587 pmu_irq_stats[0]++;
1588 }
1589 if (intr & SR_INT) {
1590 req = pmu_sr_intr();
1591 if (req)
1592 break;
1593 }
1594 }
1595
1596 recheck:
1597 if (pmu_state == idle) {
1598 if (adb_int_pending) {
1599 if (int_data_state[0] == int_data_empty)
1600 int_data_last = 0;
1601 else if (int_data_state[1] == int_data_empty)
1602 int_data_last = 1;
1603 else
1604 goto no_free_slot;
1605 pmu_state = intack;
1606 int_data_state[int_data_last] = int_data_fill;
1607 /* Sounds safer to make sure ACK is high before writing.
1608 * This helped kill a problem with ADB and some iBooks
1609 */
1610 wait_for_ack();
1611 send_byte(PMU_INT_ACK);
1612 adb_int_pending = 0;
1613 } else if (current_req)
1614 pmu_start();
1615 }
1616 no_free_slot:
1617 /* Mark the oldest buffer for flushing */
1618 if (int_data_state[!int_data_last] == int_data_ready) {
1619 int_data_state[!int_data_last] = int_data_flush;
1620 int_data = !int_data_last;
1621 } else if (int_data_state[int_data_last] == int_data_ready) {
1622 int_data_state[int_data_last] = int_data_flush;
1623 int_data = int_data_last;
1624 }
1625 --disable_poll;
1626 spin_unlock_irqrestore(&pmu_lock, flags);
1627
1628 /* Deal with completed PMU requests outside of the lock */
1629 if (req) {
1630 pmu_done(req);
1631 req = NULL;
1632 }
1633
1634 /* Deal with interrupt datas outside of the lock */
1635 if (int_data >= 0) {
1636 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1637 spin_lock_irqsave(&pmu_lock, flags);
1638 ++disable_poll;
1639 int_data_state[int_data] = int_data_empty;
1640 int_data = -1;
1641 goto recheck;
1642 }
1643
1644 return IRQ_RETVAL(handled);
1645 }
1646
1647 void
pmu_unlock(void)1648 pmu_unlock(void)
1649 {
1650 unsigned long flags;
1651
1652 spin_lock_irqsave(&pmu_lock, flags);
1653 if (pmu_state == locked)
1654 pmu_state = idle;
1655 adb_int_pending = 1;
1656 spin_unlock_irqrestore(&pmu_lock, flags);
1657 }
1658
1659
1660 static irqreturn_t
gpio1_interrupt(int irq,void * arg)1661 gpio1_interrupt(int irq, void *arg)
1662 {
1663 unsigned long flags;
1664
1665 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1666 spin_lock_irqsave(&pmu_lock, flags);
1667 if (gpio_irq_enabled > 0) {
1668 disable_irq_nosync(gpio_irq);
1669 gpio_irq_enabled = 0;
1670 }
1671 pmu_irq_stats[1]++;
1672 adb_int_pending = 1;
1673 spin_unlock_irqrestore(&pmu_lock, flags);
1674 via_pmu_interrupt(0, NULL);
1675 return IRQ_HANDLED;
1676 }
1677 return IRQ_NONE;
1678 }
1679
1680 void
pmu_enable_irled(int on)1681 pmu_enable_irled(int on)
1682 {
1683 struct adb_request req;
1684
1685 if (vias == NULL)
1686 return ;
1687 if (pmu_kind == PMU_KEYLARGO_BASED)
1688 return ;
1689
1690 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1691 (on ? PMU_POW_ON : PMU_POW_OFF));
1692 pmu_wait_complete(&req);
1693 }
1694
1695 void
pmu_restart(void)1696 pmu_restart(void)
1697 {
1698 struct adb_request req;
1699
1700 if (via == NULL)
1701 return;
1702
1703 local_irq_disable();
1704
1705 drop_interrupts = 1;
1706
1707 if (pmu_kind != PMU_KEYLARGO_BASED) {
1708 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1709 PMU_INT_TICK );
1710 while(!req.complete)
1711 pmu_poll();
1712 }
1713
1714 pmu_request(&req, NULL, 1, PMU_RESET);
1715 pmu_wait_complete(&req);
1716 for (;;)
1717 ;
1718 }
1719
1720 void
pmu_shutdown(void)1721 pmu_shutdown(void)
1722 {
1723 struct adb_request req;
1724
1725 if (via == NULL)
1726 return;
1727
1728 local_irq_disable();
1729
1730 drop_interrupts = 1;
1731
1732 if (pmu_kind != PMU_KEYLARGO_BASED) {
1733 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1734 PMU_INT_TICK );
1735 pmu_wait_complete(&req);
1736 } else {
1737 /* Disable server mode on shutdown or we'll just
1738 * wake up again
1739 */
1740 pmu_set_server_mode(0);
1741 }
1742
1743 pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1744 'M', 'A', 'T', 'T');
1745 pmu_wait_complete(&req);
1746 for (;;)
1747 ;
1748 }
1749
1750 int
pmu_present(void)1751 pmu_present(void)
1752 {
1753 return via != 0;
1754 }
1755
1756 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1757 /*
1758 * Put the powerbook to sleep.
1759 */
1760
1761 static u32 save_via[8];
1762
1763 static void
save_via_state(void)1764 save_via_state(void)
1765 {
1766 save_via[0] = in_8(&via[ANH]);
1767 save_via[1] = in_8(&via[DIRA]);
1768 save_via[2] = in_8(&via[B]);
1769 save_via[3] = in_8(&via[DIRB]);
1770 save_via[4] = in_8(&via[PCR]);
1771 save_via[5] = in_8(&via[ACR]);
1772 save_via[6] = in_8(&via[T1CL]);
1773 save_via[7] = in_8(&via[T1CH]);
1774 }
1775 static void
restore_via_state(void)1776 restore_via_state(void)
1777 {
1778 out_8(&via[ANH], save_via[0]);
1779 out_8(&via[DIRA], save_via[1]);
1780 out_8(&via[B], save_via[2]);
1781 out_8(&via[DIRB], save_via[3]);
1782 out_8(&via[PCR], save_via[4]);
1783 out_8(&via[ACR], save_via[5]);
1784 out_8(&via[T1CL], save_via[6]);
1785 out_8(&via[T1CH], save_via[7]);
1786 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
1787 out_8(&via[IFR], 0x7f); /* clear IFR */
1788 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1789 }
1790
1791 #define GRACKLE_PM (1<<7)
1792 #define GRACKLE_DOZE (1<<5)
1793 #define GRACKLE_NAP (1<<4)
1794 #define GRACKLE_SLEEP (1<<3)
1795
powerbook_sleep_grackle(void)1796 static int powerbook_sleep_grackle(void)
1797 {
1798 unsigned long save_l2cr;
1799 unsigned short pmcr1;
1800 struct adb_request req;
1801 struct pci_dev *grackle;
1802
1803 grackle = pci_get_bus_and_slot(0, 0);
1804 if (!grackle)
1805 return -ENODEV;
1806
1807 /* Turn off various things. Darwin does some retry tests here... */
1808 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1809 pmu_wait_complete(&req);
1810 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1811 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1812 pmu_wait_complete(&req);
1813
1814 /* For 750, save backside cache setting and disable it */
1815 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1816
1817 if (!__fake_sleep) {
1818 /* Ask the PMU to put us to sleep */
1819 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1820 pmu_wait_complete(&req);
1821 }
1822
1823 /* The VIA is supposed not to be restored correctly*/
1824 save_via_state();
1825 /* We shut down some HW */
1826 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1827
1828 pci_read_config_word(grackle, 0x70, &pmcr1);
1829 /* Apparently, MacOS uses NAP mode for Grackle ??? */
1830 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1831 pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1832 pci_write_config_word(grackle, 0x70, pmcr1);
1833
1834 /* Call low-level ASM sleep handler */
1835 if (__fake_sleep)
1836 mdelay(5000);
1837 else
1838 low_sleep_handler();
1839
1840 /* We're awake again, stop grackle PM */
1841 pci_read_config_word(grackle, 0x70, &pmcr1);
1842 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1843 pci_write_config_word(grackle, 0x70, pmcr1);
1844
1845 pci_dev_put(grackle);
1846
1847 /* Make sure the PMU is idle */
1848 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1849 restore_via_state();
1850
1851 /* Restore L2 cache */
1852 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1853 _set_L2CR(save_l2cr);
1854
1855 /* Restore userland MMU context */
1856 switch_mmu_context(NULL, current->active_mm, NULL);
1857
1858 /* Power things up */
1859 pmu_unlock();
1860 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1861 pmu_wait_complete(&req);
1862 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1863 PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1864 pmu_wait_complete(&req);
1865 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1866 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1867 pmu_wait_complete(&req);
1868
1869 return 0;
1870 }
1871
1872 static int
powerbook_sleep_Core99(void)1873 powerbook_sleep_Core99(void)
1874 {
1875 unsigned long save_l2cr;
1876 unsigned long save_l3cr;
1877 struct adb_request req;
1878
1879 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1880 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1881 return -ENOSYS;
1882 }
1883
1884 if (num_online_cpus() > 1 || cpu_is_offline(0))
1885 return -EAGAIN;
1886
1887 /* Stop environment and ADB interrupts */
1888 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1889 pmu_wait_complete(&req);
1890
1891 /* Tell PMU what events will wake us up */
1892 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1893 0xff, 0xff);
1894 pmu_wait_complete(&req);
1895 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1896 0, PMU_PWR_WAKEUP_KEY |
1897 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1898 pmu_wait_complete(&req);
1899
1900 /* Save the state of the L2 and L3 caches */
1901 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */
1902 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1903
1904 if (!__fake_sleep) {
1905 /* Ask the PMU to put us to sleep */
1906 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1907 pmu_wait_complete(&req);
1908 }
1909
1910 /* The VIA is supposed not to be restored correctly*/
1911 save_via_state();
1912
1913 /* Shut down various ASICs. There's a chance that we can no longer
1914 * talk to the PMU after this, so I moved it to _after_ sending the
1915 * sleep command to it. Still need to be checked.
1916 */
1917 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1918
1919 /* Call low-level ASM sleep handler */
1920 if (__fake_sleep)
1921 mdelay(5000);
1922 else
1923 low_sleep_handler();
1924
1925 /* Restore Apple core ASICs state */
1926 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1927
1928 /* Restore VIA */
1929 restore_via_state();
1930
1931 /* tweak LPJ before cpufreq is there */
1932 loops_per_jiffy *= 2;
1933
1934 /* Restore video */
1935 pmac_call_early_video_resume();
1936
1937 /* Restore L2 cache */
1938 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1939 _set_L2CR(save_l2cr);
1940 /* Restore L3 cache */
1941 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1942 _set_L3CR(save_l3cr);
1943
1944 /* Restore userland MMU context */
1945 switch_mmu_context(NULL, current->active_mm, NULL);
1946
1947 /* Tell PMU we are ready */
1948 pmu_unlock();
1949 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1950 pmu_wait_complete(&req);
1951 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1952 pmu_wait_complete(&req);
1953
1954 /* Restore LPJ, cpufreq will adjust the cpu frequency */
1955 loops_per_jiffy /= 2;
1956
1957 return 0;
1958 }
1959
1960 #define PB3400_MEM_CTRL 0xf8000000
1961 #define PB3400_MEM_CTRL_SLEEP 0x70
1962
1963 static void __iomem *pb3400_mem_ctrl;
1964
powerbook_sleep_init_3400(void)1965 static void powerbook_sleep_init_3400(void)
1966 {
1967 /* map in the memory controller registers */
1968 pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
1969 if (pb3400_mem_ctrl == NULL)
1970 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
1971 }
1972
powerbook_sleep_3400(void)1973 static int powerbook_sleep_3400(void)
1974 {
1975 int i, x;
1976 unsigned int hid0;
1977 unsigned long msr;
1978 struct adb_request sleep_req;
1979 unsigned int __iomem *mem_ctrl_sleep;
1980
1981 if (pb3400_mem_ctrl == NULL)
1982 return -ENOMEM;
1983 mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
1984
1985 /* Set the memory controller to keep the memory refreshed
1986 while we're asleep */
1987 for (i = 0x403f; i >= 0x4000; --i) {
1988 out_be32(mem_ctrl_sleep, i);
1989 do {
1990 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
1991 } while (x == 0);
1992 if (x >= 0x100)
1993 break;
1994 }
1995
1996 /* Ask the PMU to put us to sleep */
1997 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1998 pmu_wait_complete(&sleep_req);
1999 pmu_unlock();
2000
2001 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2002
2003 asleep = 1;
2004
2005 /* Put the CPU into sleep mode */
2006 hid0 = mfspr(SPRN_HID0);
2007 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2008 mtspr(SPRN_HID0, hid0);
2009 local_irq_enable();
2010 msr = mfmsr() | MSR_POW;
2011 while (asleep) {
2012 mb();
2013 mtmsr(msr);
2014 isync();
2015 }
2016 local_irq_disable();
2017
2018 /* OK, we're awake again, start restoring things */
2019 out_be32(mem_ctrl_sleep, 0x3f);
2020 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2021
2022 return 0;
2023 }
2024
2025 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2026
2027 /*
2028 * Support for /dev/pmu device
2029 */
2030 #define RB_SIZE 0x10
2031 struct pmu_private {
2032 struct list_head list;
2033 int rb_get;
2034 int rb_put;
2035 struct rb_entry {
2036 unsigned short len;
2037 unsigned char data[16];
2038 } rb_buf[RB_SIZE];
2039 wait_queue_head_t wait;
2040 spinlock_t lock;
2041 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2042 int backlight_locker;
2043 #endif
2044 };
2045
2046 static LIST_HEAD(all_pmu_pvt);
2047 static DEFINE_SPINLOCK(all_pvt_lock);
2048
2049 static void
pmu_pass_intr(unsigned char * data,int len)2050 pmu_pass_intr(unsigned char *data, int len)
2051 {
2052 struct pmu_private *pp;
2053 struct list_head *list;
2054 int i;
2055 unsigned long flags;
2056
2057 if (len > sizeof(pp->rb_buf[0].data))
2058 len = sizeof(pp->rb_buf[0].data);
2059 spin_lock_irqsave(&all_pvt_lock, flags);
2060 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2061 pp = list_entry(list, struct pmu_private, list);
2062 spin_lock(&pp->lock);
2063 i = pp->rb_put + 1;
2064 if (i >= RB_SIZE)
2065 i = 0;
2066 if (i != pp->rb_get) {
2067 struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2068 rp->len = len;
2069 memcpy(rp->data, data, len);
2070 pp->rb_put = i;
2071 wake_up_interruptible(&pp->wait);
2072 }
2073 spin_unlock(&pp->lock);
2074 }
2075 spin_unlock_irqrestore(&all_pvt_lock, flags);
2076 }
2077
2078 static int
pmu_open(struct inode * inode,struct file * file)2079 pmu_open(struct inode *inode, struct file *file)
2080 {
2081 struct pmu_private *pp;
2082 unsigned long flags;
2083
2084 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2085 if (pp == 0)
2086 return -ENOMEM;
2087 pp->rb_get = pp->rb_put = 0;
2088 spin_lock_init(&pp->lock);
2089 init_waitqueue_head(&pp->wait);
2090 mutex_lock(&pmu_info_proc_mutex);
2091 spin_lock_irqsave(&all_pvt_lock, flags);
2092 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2093 pp->backlight_locker = 0;
2094 #endif
2095 list_add(&pp->list, &all_pmu_pvt);
2096 spin_unlock_irqrestore(&all_pvt_lock, flags);
2097 file->private_data = pp;
2098 mutex_unlock(&pmu_info_proc_mutex);
2099 return 0;
2100 }
2101
2102 static ssize_t
pmu_read(struct file * file,char __user * buf,size_t count,loff_t * ppos)2103 pmu_read(struct file *file, char __user *buf,
2104 size_t count, loff_t *ppos)
2105 {
2106 struct pmu_private *pp = file->private_data;
2107 DECLARE_WAITQUEUE(wait, current);
2108 unsigned long flags;
2109 int ret = 0;
2110
2111 if (count < 1 || pp == 0)
2112 return -EINVAL;
2113 if (!access_ok(VERIFY_WRITE, buf, count))
2114 return -EFAULT;
2115
2116 spin_lock_irqsave(&pp->lock, flags);
2117 add_wait_queue(&pp->wait, &wait);
2118 set_current_state(TASK_INTERRUPTIBLE);
2119
2120 for (;;) {
2121 ret = -EAGAIN;
2122 if (pp->rb_get != pp->rb_put) {
2123 int i = pp->rb_get;
2124 struct rb_entry *rp = &pp->rb_buf[i];
2125 ret = rp->len;
2126 spin_unlock_irqrestore(&pp->lock, flags);
2127 if (ret > count)
2128 ret = count;
2129 if (ret > 0 && copy_to_user(buf, rp->data, ret))
2130 ret = -EFAULT;
2131 if (++i >= RB_SIZE)
2132 i = 0;
2133 spin_lock_irqsave(&pp->lock, flags);
2134 pp->rb_get = i;
2135 }
2136 if (ret >= 0)
2137 break;
2138 if (file->f_flags & O_NONBLOCK)
2139 break;
2140 ret = -ERESTARTSYS;
2141 if (signal_pending(current))
2142 break;
2143 spin_unlock_irqrestore(&pp->lock, flags);
2144 schedule();
2145 spin_lock_irqsave(&pp->lock, flags);
2146 }
2147 __set_current_state(TASK_RUNNING);
2148 remove_wait_queue(&pp->wait, &wait);
2149 spin_unlock_irqrestore(&pp->lock, flags);
2150
2151 return ret;
2152 }
2153
2154 static ssize_t
pmu_write(struct file * file,const char __user * buf,size_t count,loff_t * ppos)2155 pmu_write(struct file *file, const char __user *buf,
2156 size_t count, loff_t *ppos)
2157 {
2158 return 0;
2159 }
2160
2161 static unsigned int
pmu_fpoll(struct file * filp,poll_table * wait)2162 pmu_fpoll(struct file *filp, poll_table *wait)
2163 {
2164 struct pmu_private *pp = filp->private_data;
2165 unsigned int mask = 0;
2166 unsigned long flags;
2167
2168 if (pp == 0)
2169 return 0;
2170 poll_wait(filp, &pp->wait, wait);
2171 spin_lock_irqsave(&pp->lock, flags);
2172 if (pp->rb_get != pp->rb_put)
2173 mask |= POLLIN;
2174 spin_unlock_irqrestore(&pp->lock, flags);
2175 return mask;
2176 }
2177
2178 static int
pmu_release(struct inode * inode,struct file * file)2179 pmu_release(struct inode *inode, struct file *file)
2180 {
2181 struct pmu_private *pp = file->private_data;
2182 unsigned long flags;
2183
2184 if (pp != 0) {
2185 file->private_data = NULL;
2186 spin_lock_irqsave(&all_pvt_lock, flags);
2187 list_del(&pp->list);
2188 spin_unlock_irqrestore(&all_pvt_lock, flags);
2189
2190 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2191 if (pp->backlight_locker)
2192 pmac_backlight_enable();
2193 #endif
2194
2195 kfree(pp);
2196 }
2197 return 0;
2198 }
2199
2200 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
pmac_suspend_disable_irqs(void)2201 static void pmac_suspend_disable_irqs(void)
2202 {
2203 /* Call platform functions marked "on sleep" */
2204 pmac_pfunc_i2c_suspend();
2205 pmac_pfunc_base_suspend();
2206 }
2207
powerbook_sleep(suspend_state_t state)2208 static int powerbook_sleep(suspend_state_t state)
2209 {
2210 int error = 0;
2211
2212 /* Wait for completion of async requests */
2213 while (!batt_req.complete)
2214 pmu_poll();
2215
2216 /* Giveup the lazy FPU & vec so we don't have to back them
2217 * up from the low level code
2218 */
2219 enable_kernel_fp();
2220
2221 #ifdef CONFIG_ALTIVEC
2222 if (cpu_has_feature(CPU_FTR_ALTIVEC))
2223 enable_kernel_altivec();
2224 #endif /* CONFIG_ALTIVEC */
2225
2226 switch (pmu_kind) {
2227 case PMU_OHARE_BASED:
2228 error = powerbook_sleep_3400();
2229 break;
2230 case PMU_HEATHROW_BASED:
2231 case PMU_PADDINGTON_BASED:
2232 error = powerbook_sleep_grackle();
2233 break;
2234 case PMU_KEYLARGO_BASED:
2235 error = powerbook_sleep_Core99();
2236 break;
2237 default:
2238 return -ENOSYS;
2239 }
2240
2241 if (error)
2242 return error;
2243
2244 mdelay(100);
2245
2246 return 0;
2247 }
2248
pmac_suspend_enable_irqs(void)2249 static void pmac_suspend_enable_irqs(void)
2250 {
2251 /* Force a poll of ADB interrupts */
2252 adb_int_pending = 1;
2253 via_pmu_interrupt(0, NULL);
2254
2255 mdelay(10);
2256
2257 /* Call platform functions marked "on wake" */
2258 pmac_pfunc_base_resume();
2259 pmac_pfunc_i2c_resume();
2260 }
2261
pmu_sleep_valid(suspend_state_t state)2262 static int pmu_sleep_valid(suspend_state_t state)
2263 {
2264 return state == PM_SUSPEND_MEM
2265 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2266 }
2267
2268 static const struct platform_suspend_ops pmu_pm_ops = {
2269 .enter = powerbook_sleep,
2270 .valid = pmu_sleep_valid,
2271 };
2272
register_pmu_pm_ops(void)2273 static int register_pmu_pm_ops(void)
2274 {
2275 if (pmu_kind == PMU_OHARE_BASED)
2276 powerbook_sleep_init_3400();
2277 ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2278 ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2279 suspend_set_ops(&pmu_pm_ops);
2280
2281 return 0;
2282 }
2283
2284 device_initcall(register_pmu_pm_ops);
2285 #endif
2286
pmu_ioctl(struct file * filp,u_int cmd,u_long arg)2287 static int pmu_ioctl(struct file *filp,
2288 u_int cmd, u_long arg)
2289 {
2290 __u32 __user *argp = (__u32 __user *)arg;
2291 int error = -EINVAL;
2292
2293 switch (cmd) {
2294 case PMU_IOC_SLEEP:
2295 if (!capable(CAP_SYS_ADMIN))
2296 return -EACCES;
2297 return pm_suspend(PM_SUSPEND_MEM);
2298 case PMU_IOC_CAN_SLEEP:
2299 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2300 return put_user(0, argp);
2301 else
2302 return put_user(1, argp);
2303
2304 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2305 /* Compatibility ioctl's for backlight */
2306 case PMU_IOC_GET_BACKLIGHT:
2307 {
2308 int brightness;
2309
2310 brightness = pmac_backlight_get_legacy_brightness();
2311 if (brightness < 0)
2312 return brightness;
2313 else
2314 return put_user(brightness, argp);
2315
2316 }
2317 case PMU_IOC_SET_BACKLIGHT:
2318 {
2319 int brightness;
2320
2321 error = get_user(brightness, argp);
2322 if (error)
2323 return error;
2324
2325 return pmac_backlight_set_legacy_brightness(brightness);
2326 }
2327 #ifdef CONFIG_INPUT_ADBHID
2328 case PMU_IOC_GRAB_BACKLIGHT: {
2329 struct pmu_private *pp = filp->private_data;
2330
2331 if (pp->backlight_locker)
2332 return 0;
2333
2334 pp->backlight_locker = 1;
2335 pmac_backlight_disable();
2336
2337 return 0;
2338 }
2339 #endif /* CONFIG_INPUT_ADBHID */
2340 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2341
2342 case PMU_IOC_GET_MODEL:
2343 return put_user(pmu_kind, argp);
2344 case PMU_IOC_HAS_ADB:
2345 return put_user(pmu_has_adb, argp);
2346 }
2347 return error;
2348 }
2349
pmu_unlocked_ioctl(struct file * filp,u_int cmd,u_long arg)2350 static long pmu_unlocked_ioctl(struct file *filp,
2351 u_int cmd, u_long arg)
2352 {
2353 int ret;
2354
2355 mutex_lock(&pmu_info_proc_mutex);
2356 ret = pmu_ioctl(filp, cmd, arg);
2357 mutex_unlock(&pmu_info_proc_mutex);
2358
2359 return ret;
2360 }
2361
2362 #ifdef CONFIG_COMPAT
2363 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2364 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2365 #define PMU_IOC_GET_MODEL32 _IOR('B', 3, compat_size_t)
2366 #define PMU_IOC_HAS_ADB32 _IOR('B', 4, compat_size_t)
2367 #define PMU_IOC_CAN_SLEEP32 _IOR('B', 5, compat_size_t)
2368 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2369
compat_pmu_ioctl(struct file * filp,u_int cmd,u_long arg)2370 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2371 {
2372 switch (cmd) {
2373 case PMU_IOC_SLEEP:
2374 break;
2375 case PMU_IOC_GET_BACKLIGHT32:
2376 cmd = PMU_IOC_GET_BACKLIGHT;
2377 break;
2378 case PMU_IOC_SET_BACKLIGHT32:
2379 cmd = PMU_IOC_SET_BACKLIGHT;
2380 break;
2381 case PMU_IOC_GET_MODEL32:
2382 cmd = PMU_IOC_GET_MODEL;
2383 break;
2384 case PMU_IOC_HAS_ADB32:
2385 cmd = PMU_IOC_HAS_ADB;
2386 break;
2387 case PMU_IOC_CAN_SLEEP32:
2388 cmd = PMU_IOC_CAN_SLEEP;
2389 break;
2390 case PMU_IOC_GRAB_BACKLIGHT32:
2391 cmd = PMU_IOC_GRAB_BACKLIGHT;
2392 break;
2393 default:
2394 return -ENOIOCTLCMD;
2395 }
2396 return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2397 }
2398 #endif
2399
2400 static const struct file_operations pmu_device_fops = {
2401 .read = pmu_read,
2402 .write = pmu_write,
2403 .poll = pmu_fpoll,
2404 .unlocked_ioctl = pmu_unlocked_ioctl,
2405 #ifdef CONFIG_COMPAT
2406 .compat_ioctl = compat_pmu_ioctl,
2407 #endif
2408 .open = pmu_open,
2409 .release = pmu_release,
2410 .llseek = noop_llseek,
2411 };
2412
2413 static struct miscdevice pmu_device = {
2414 PMU_MINOR, "pmu", &pmu_device_fops
2415 };
2416
pmu_device_init(void)2417 static int pmu_device_init(void)
2418 {
2419 if (!via)
2420 return 0;
2421 if (misc_register(&pmu_device) < 0)
2422 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2423 return 0;
2424 }
2425 device_initcall(pmu_device_init);
2426
2427
2428 #ifdef DEBUG_SLEEP
2429 static inline void
polled_handshake(volatile unsigned char __iomem * via)2430 polled_handshake(volatile unsigned char __iomem *via)
2431 {
2432 via[B] &= ~TREQ; eieio();
2433 while ((via[B] & TACK) != 0)
2434 ;
2435 via[B] |= TREQ; eieio();
2436 while ((via[B] & TACK) == 0)
2437 ;
2438 }
2439
2440 static inline void
polled_send_byte(volatile unsigned char __iomem * via,int x)2441 polled_send_byte(volatile unsigned char __iomem *via, int x)
2442 {
2443 via[ACR] |= SR_OUT | SR_EXT; eieio();
2444 via[SR] = x; eieio();
2445 polled_handshake(via);
2446 }
2447
2448 static inline int
polled_recv_byte(volatile unsigned char __iomem * via)2449 polled_recv_byte(volatile unsigned char __iomem *via)
2450 {
2451 int x;
2452
2453 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2454 x = via[SR]; eieio();
2455 polled_handshake(via);
2456 x = via[SR]; eieio();
2457 return x;
2458 }
2459
2460 int
pmu_polled_request(struct adb_request * req)2461 pmu_polled_request(struct adb_request *req)
2462 {
2463 unsigned long flags;
2464 int i, l, c;
2465 volatile unsigned char __iomem *v = via;
2466
2467 req->complete = 1;
2468 c = req->data[0];
2469 l = pmu_data_len[c][0];
2470 if (l >= 0 && req->nbytes != l + 1)
2471 return -EINVAL;
2472
2473 local_irq_save(flags);
2474 while (pmu_state != idle)
2475 pmu_poll();
2476
2477 while ((via[B] & TACK) == 0)
2478 ;
2479 polled_send_byte(v, c);
2480 if (l < 0) {
2481 l = req->nbytes - 1;
2482 polled_send_byte(v, l);
2483 }
2484 for (i = 1; i <= l; ++i)
2485 polled_send_byte(v, req->data[i]);
2486
2487 l = pmu_data_len[c][1];
2488 if (l < 0)
2489 l = polled_recv_byte(v);
2490 for (i = 0; i < l; ++i)
2491 req->reply[i + req->reply_len] = polled_recv_byte(v);
2492
2493 if (req->done)
2494 (*req->done)(req);
2495
2496 local_irq_restore(flags);
2497 return 0;
2498 }
2499
2500 /* N.B. This doesn't work on the 3400 */
pmu_blink(int n)2501 void pmu_blink(int n)
2502 {
2503 struct adb_request req;
2504
2505 memset(&req, 0, sizeof(req));
2506
2507 for (; n > 0; --n) {
2508 req.nbytes = 4;
2509 req.done = NULL;
2510 req.data[0] = 0xee;
2511 req.data[1] = 4;
2512 req.data[2] = 0;
2513 req.data[3] = 1;
2514 req.reply[0] = ADB_RET_OK;
2515 req.reply_len = 1;
2516 req.reply_expected = 0;
2517 pmu_polled_request(&req);
2518 mdelay(50);
2519 req.nbytes = 4;
2520 req.done = NULL;
2521 req.data[0] = 0xee;
2522 req.data[1] = 4;
2523 req.data[2] = 0;
2524 req.data[3] = 0;
2525 req.reply[0] = ADB_RET_OK;
2526 req.reply_len = 1;
2527 req.reply_expected = 0;
2528 pmu_polled_request(&req);
2529 mdelay(50);
2530 }
2531 mdelay(50);
2532 }
2533 #endif /* DEBUG_SLEEP */
2534
2535 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2536 int pmu_sys_suspended;
2537
pmu_syscore_suspend(void)2538 static int pmu_syscore_suspend(void)
2539 {
2540 /* Suspend PMU event interrupts */
2541 pmu_suspend();
2542 pmu_sys_suspended = 1;
2543
2544 #ifdef CONFIG_PMAC_BACKLIGHT
2545 /* Tell backlight code not to muck around with the chip anymore */
2546 pmu_backlight_set_sleep(1);
2547 #endif
2548
2549 return 0;
2550 }
2551
pmu_syscore_resume(void)2552 static void pmu_syscore_resume(void)
2553 {
2554 struct adb_request req;
2555
2556 if (!pmu_sys_suspended)
2557 return;
2558
2559 /* Tell PMU we are ready */
2560 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2561 pmu_wait_complete(&req);
2562
2563 #ifdef CONFIG_PMAC_BACKLIGHT
2564 /* Tell backlight code it can use the chip again */
2565 pmu_backlight_set_sleep(0);
2566 #endif
2567 /* Resume PMU event interrupts */
2568 pmu_resume();
2569 pmu_sys_suspended = 0;
2570 }
2571
2572 static struct syscore_ops pmu_syscore_ops = {
2573 .suspend = pmu_syscore_suspend,
2574 .resume = pmu_syscore_resume,
2575 };
2576
pmu_syscore_register(void)2577 static int pmu_syscore_register(void)
2578 {
2579 register_syscore_ops(&pmu_syscore_ops);
2580
2581 return 0;
2582 }
2583 subsys_initcall(pmu_syscore_register);
2584 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2585
2586 EXPORT_SYMBOL(pmu_request);
2587 EXPORT_SYMBOL(pmu_queue_request);
2588 EXPORT_SYMBOL(pmu_poll);
2589 EXPORT_SYMBOL(pmu_poll_adb);
2590 EXPORT_SYMBOL(pmu_wait_complete);
2591 EXPORT_SYMBOL(pmu_suspend);
2592 EXPORT_SYMBOL(pmu_resume);
2593 EXPORT_SYMBOL(pmu_unlock);
2594 #if defined(CONFIG_PPC32)
2595 EXPORT_SYMBOL(pmu_enable_irled);
2596 EXPORT_SYMBOL(pmu_battery_count);
2597 EXPORT_SYMBOL(pmu_batteries);
2598 EXPORT_SYMBOL(pmu_power_flags);
2599 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2600
2601