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added 2.6.29.6 aldebaran kernel
[nao-ulib.git] / kernel / 2.6.29.6-aldebaran-rt / arch / arm / common / sharpsl_pm.c
blob780bbf7cb26f28266f3141250b763b82f2590e69
1 /*
2 * Battery and Power Management code for the Sharp SL-C7xx and SL-Cxx00
3 * series of PDAs
4 *
5 * Copyright (c) 2004-2005 Richard Purdie
6 *
7 * Based on code written by Sharp for 2.4 kernels
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 */
14
15 #undef DEBUG
16
17 #include <linux/module.h>
18 #include <linux/timer.h>
19 #include <linux/init.h>
20 #include <linux/kernel.h>
21 #include <linux/apm_bios.h>
22 #include <linux/delay.h>
23 #include <linux/interrupt.h>
24 #include <linux/platform_device.h>
25 #include <linux/leds.h>
26 #include <linux/apm-emulation.h>
27 #include <linux/suspend.h>
28
29 #include <mach/hardware.h>
30 #include <asm/irq.h>
31 #include <mach/pm.h>
32 #include <mach/pxa-regs.h>
33 #include <mach/pxa2xx-regs.h>
34 #include <mach/sharpsl.h>
35 #include <asm/hardware/sharpsl_pm.h>
36
37 /*
38 * Constants
39 */
40 #define SHARPSL_CHARGE_ON_TIME_INTERVAL (msecs_to_jiffies(1*60*1000)) /* 1 min */
41 #define SHARPSL_CHARGE_FINISH_TIME (msecs_to_jiffies(10*60*1000)) /* 10 min */
42 #define SHARPSL_BATCHK_TIME (msecs_to_jiffies(15*1000)) /* 15 sec */
43 #define SHARPSL_BATCHK_TIME_SUSPEND (60*10) /* 10 min */
44
45 #define SHARPSL_WAIT_CO_TIME 15 /* 15 sec */
46 #define SHARPSL_WAIT_DISCHARGE_ON 100 /* 100 msec */
47 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP 10 /* 10 msec */
48 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT 10 /* 10 msec */
49 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN 10 /* 10 msec */
50 #define SHARPSL_CHARGE_WAIT_TIME 15 /* 15 msec */
51 #define SHARPSL_CHARGE_CO_CHECK_TIME 5 /* 5 msec */
52 #define SHARPSL_CHARGE_RETRY_CNT 1 /* eqv. 10 min */
53
54 /*
55 * Prototypes
56 */
57 #ifdef CONFIG_PM
58 static int sharpsl_off_charge_battery(void);
59 static int sharpsl_check_battery_voltage(void);
60 static int sharpsl_fatal_check(void);
61 #endif
62 static int sharpsl_check_battery_temp(void);
63 static int sharpsl_ac_check(void);
64 static int sharpsl_average_value(int ad);
65 static void sharpsl_average_clear(void);
66 static void sharpsl_charge_toggle(struct work_struct *private_);
67 static void sharpsl_battery_thread(struct work_struct *private_);
68
69
70 /*
71 * Variables
72 */
73 struct sharpsl_pm_status sharpsl_pm;
74 DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
75 DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
76 DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
77
78
79 static int get_percentage(int voltage)
80 {
81 int i = sharpsl_pm.machinfo->bat_levels - 1;
82 int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
83 struct battery_thresh *thresh;
84
85 if (sharpsl_pm.charge_mode == CHRG_ON)
86 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
87 else
88 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
89
90 while (i > 0 && (voltage > thresh[i].voltage))
91 i--;
92
93 return thresh[i].percentage;
94 }
95
96 static int get_apm_status(int voltage)
97 {
98 int low_thresh, high_thresh;
99
100 if (sharpsl_pm.charge_mode == CHRG_ON) {
101 high_thresh = sharpsl_pm.machinfo->status_high_acin;
102 low_thresh = sharpsl_pm.machinfo->status_low_acin;
103 } else {
104 high_thresh = sharpsl_pm.machinfo->status_high_noac;
105 low_thresh = sharpsl_pm.machinfo->status_low_noac;
106 }
107
108 if (voltage >= high_thresh)
109 return APM_BATTERY_STATUS_HIGH;
110 if (voltage >= low_thresh)
111 return APM_BATTERY_STATUS_LOW;
112 return APM_BATTERY_STATUS_CRITICAL;
113 }
114
115 void sharpsl_battery_kick(void)
116 {
117 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
118 }
119 EXPORT_SYMBOL(sharpsl_battery_kick);
120
121
122 static void sharpsl_battery_thread(struct work_struct *private_)
123 {
124 int voltage, percent, apm_status, i = 0;
125
126 if (!sharpsl_pm.machinfo)
127 return;
128
129 sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
130
131 /* Corgi cannot confirm when battery fully charged so periodically kick! */
132 if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
133 && time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_ON_TIME_INTERVAL))
134 schedule_delayed_work(&toggle_charger, 0);
135
136 while(1) {
137 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
138
139 if (voltage > 0) break;
140 if (i++ > 5) {
141 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
142 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
143 break;
144 }
145 }
146
147 voltage = sharpsl_average_value(voltage);
148 apm_status = get_apm_status(voltage);
149 percent = get_percentage(voltage);
150
151 /* At low battery voltages, the voltage has a tendency to start
152 creeping back up so we try to avoid this here */
153 if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE) || (apm_status == APM_BATTERY_STATUS_HIGH) || percent <= sharpsl_pm.battstat.mainbat_percent) {
154 sharpsl_pm.battstat.mainbat_voltage = voltage;
155 sharpsl_pm.battstat.mainbat_status = apm_status;
156 sharpsl_pm.battstat.mainbat_percent = percent;
157 }
158
159 dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
160 sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
161
162 #ifdef CONFIG_BACKLIGHT_CORGI
163 /* If battery is low. limit backlight intensity to save power. */
164 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
165 && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW) ||
166 (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
167 if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
168 sharpsl_pm.machinfo->backlight_limit(1);
169 sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
170 }
171 } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
172 sharpsl_pm.machinfo->backlight_limit(0);
173 sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
174 }
175 #endif
176
177 /* Suspend if critical battery level */
178 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
179 && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
180 && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
181 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
182 dev_err(sharpsl_pm.dev, "Fatal Off\n");
183 apm_queue_event(APM_CRITICAL_SUSPEND);
184 }
185
186 schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
187 }
188
189 void sharpsl_pm_led(int val)
190 {
191 if (val == SHARPSL_LED_ERROR) {
192 dev_err(sharpsl_pm.dev, "Charging Error!\n");
193 } else if (val == SHARPSL_LED_ON) {
194 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
195 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
196 } else {
197 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
198 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
199 }
200 }
201
202 static void sharpsl_charge_on(void)
203 {
204 dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
205
206 sharpsl_pm.full_count = 0;
207 sharpsl_pm.charge_mode = CHRG_ON;
208 schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
209 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
210 }
211
212 static void sharpsl_charge_off(void)
213 {
214 dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
215
216 sharpsl_pm.machinfo->charge(0);
217 sharpsl_pm_led(SHARPSL_LED_OFF);
218 sharpsl_pm.charge_mode = CHRG_OFF;
219
220 schedule_delayed_work(&sharpsl_bat, 0);
221 }
222
223 static void sharpsl_charge_error(void)
224 {
225 sharpsl_pm_led(SHARPSL_LED_ERROR);
226 sharpsl_pm.machinfo->charge(0);
227 sharpsl_pm.charge_mode = CHRG_ERROR;
228 }
229
230 static void sharpsl_charge_toggle(struct work_struct *private_)
231 {
232 dev_dbg(sharpsl_pm.dev, "Toogling Charger at time: %lx\n", jiffies);
233
234 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
235 sharpsl_charge_off();
236 return;
237 } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
238 sharpsl_charge_error();
239 return;
240 }
241
242 sharpsl_pm_led(SHARPSL_LED_ON);
243 sharpsl_pm.machinfo->charge(0);
244 mdelay(SHARPSL_CHARGE_WAIT_TIME);
245 sharpsl_pm.machinfo->charge(1);
246
247 sharpsl_pm.charge_start_time = jiffies;
248 }
249
250 static void sharpsl_ac_timer(unsigned long data)
251 {
252 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
253
254 dev_dbg(sharpsl_pm.dev, "AC Status: %d\n",acin);
255
256 sharpsl_average_clear();
257 if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
258 sharpsl_charge_on();
259 else if (sharpsl_pm.charge_mode == CHRG_ON)
260 sharpsl_charge_off();
261
262 schedule_delayed_work(&sharpsl_bat, 0);
263 }
264
265
266 irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
267 {
268 /* Delay the event slightly to debounce */
269 /* Must be a smaller delay than the chrg_full_isr below */
270 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
271
272 return IRQ_HANDLED;
273 }
274
275 static void sharpsl_chrg_full_timer(unsigned long data)
276 {
277 dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
278
279 sharpsl_pm.full_count++;
280
281 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
282 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
283 if (sharpsl_pm.charge_mode == CHRG_ON)
284 sharpsl_charge_off();
285 } else if (sharpsl_pm.full_count < 2) {
286 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
287 schedule_delayed_work(&toggle_charger, 0);
288 } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
289 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
290 schedule_delayed_work(&toggle_charger, 0);
291 } else {
292 sharpsl_charge_off();
293 sharpsl_pm.charge_mode = CHRG_DONE;
294 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
295 }
296 }
297
298 /* Charging Finished Interrupt (Not present on Corgi) */
299 /* Can trigger at the same time as an AC status change so
300 delay until after that has been processed */
301 irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
302 {
303 if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
304 return IRQ_HANDLED;
305
306 /* delay until after any ac interrupt */
307 mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
308
309 return IRQ_HANDLED;
310 }
311
312 irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
313 {
314 int is_fatal = 0;
315
316 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
317 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
318 is_fatal = 1;
319 }
320
321 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
322 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
323 is_fatal = 1;
324 }
325
326 if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
327 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
328 apm_queue_event(APM_CRITICAL_SUSPEND);
329 }
330
331 return IRQ_HANDLED;
332 }
333
334 /*
335 * Maintain an average of the last 10 readings
336 */
337 #define SHARPSL_CNV_VALUE_NUM 10
338 static int sharpsl_ad_index;
339
340 static void sharpsl_average_clear(void)
341 {
342 sharpsl_ad_index = 0;
343 }
344
345 static int sharpsl_average_value(int ad)
346 {
347 int i, ad_val = 0;
348 static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
349
350 if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
351 sharpsl_ad_index = 0;
352 return ad;
353 }
354
355 sharpsl_ad[sharpsl_ad_index] = ad;
356 sharpsl_ad_index++;
357 if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
358 for (i=0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
359 sharpsl_ad[i] = sharpsl_ad[i+1];
360 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
361 }
362 for (i=0; i < sharpsl_ad_index; i++)
363 ad_val += sharpsl_ad[i];
364
365 return (ad_val / sharpsl_ad_index);
366 }
367
368 /*
369 * Take an array of 5 integers, remove the maximum and minimum values
370 * and return the average.
371 */
372 static int get_select_val(int *val)
373 {
374 int i, j, k, temp, sum = 0;
375
376 /* Find MAX val */
377 temp = val[0];
378 j=0;
379 for (i=1; i<5; i++) {
380 if (temp < val[i]) {
381 temp = val[i];
382 j = i;
383 }
384 }
385
386 /* Find MIN val */
387 temp = val[4];
388 k=4;
389 for (i=3; i>=0; i--) {
390 if (temp > val[i]) {
391 temp = val[i];
392 k = i;
393 }
394 }
395
396 for (i=0; i<5; i++)
397 if (i != j && i != k )
398 sum += val[i];
399
400 dev_dbg(sharpsl_pm.dev, "Average: %d from values: %d, %d, %d, %d, %d\n", sum/3, val[0], val[1], val[2], val[3], val[4]);
401
402 return (sum/3);
403 }
404
405 static int sharpsl_check_battery_temp(void)
406 {
407 int val, i, buff[5];
408
409 /* Check battery temperature */
410 for (i=0; i<5; i++) {
411 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
412 sharpsl_pm.machinfo->measure_temp(1);
413 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
414 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
415 sharpsl_pm.machinfo->measure_temp(0);
416 }
417
418 val = get_select_val(buff);
419
420 dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
421 if (val > sharpsl_pm.machinfo->charge_on_temp) {
422 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
423 return -1;
424 }
425
426 return 0;
427 }
428
429 #ifdef CONFIG_PM
430 static int sharpsl_check_battery_voltage(void)
431 {
432 int val, i, buff[5];
433
434 /* disable charge, enable discharge */
435 sharpsl_pm.machinfo->charge(0);
436 sharpsl_pm.machinfo->discharge(1);
437 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
438
439 if (sharpsl_pm.machinfo->discharge1)
440 sharpsl_pm.machinfo->discharge1(1);
441
442 /* Check battery voltage */
443 for (i=0; i<5; i++) {
444 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
445 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
446 }
447
448 if (sharpsl_pm.machinfo->discharge1)
449 sharpsl_pm.machinfo->discharge1(0);
450
451 sharpsl_pm.machinfo->discharge(0);
452
453 val = get_select_val(buff);
454 dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
455
456 if (val < sharpsl_pm.machinfo->charge_on_volt)
457 return -1;
458
459 return 0;
460 }
461 #endif
462
463 static int sharpsl_ac_check(void)
464 {
465 int temp, i, buff[5];
466
467 for (i=0; i<5; i++) {
468 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
469 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
470 }
471
472 temp = get_select_val(buff);
473 dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n",temp);
474
475 if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
476 dev_err(sharpsl_pm.dev, "Error: AC check failed.\n");
477 return -1;
478 }
479
480 return 0;
481 }
482
483 #ifdef CONFIG_PM
484 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
485 {
486 sharpsl_pm.flags |= SHARPSL_SUSPENDED;
487 flush_scheduled_work();
488
489 if (sharpsl_pm.charge_mode == CHRG_ON)
490 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
491 else
492 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
493
494 return 0;
495 }
496
497 static int sharpsl_pm_resume(struct platform_device *pdev)
498 {
499 /* Clear the reset source indicators as they break the bootloader upon reboot */
500 RCSR = 0x0f;
501 sharpsl_average_clear();
502 sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
503 sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
504
505 return 0;
506 }
507
508 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
509 {
510 dev_dbg(sharpsl_pm.dev, "Time is: %08x\n",RCNR);
511
512 dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n",sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
513 /* not charging and AC-IN! */
514
515 if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
516 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
517 sharpsl_pm.charge_mode = CHRG_OFF;
518 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
519 sharpsl_off_charge_battery();
520 }
521
522 sharpsl_pm.machinfo->presuspend();
523
524 PEDR = 0xffffffff; /* clear it */
525
526 sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
527 if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
528 RTSR &= RTSR_ALE;
529 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
530 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n",RTAR);
531 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
532 } else if (alarm_enable) {
533 RTSR &= RTSR_ALE;
534 RTAR = alarm_time;
535 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n",RTAR);
536 } else {
537 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
538 }
539
540 pxa_pm_enter(state);
541
542 sharpsl_pm.machinfo->postsuspend();
543
544 dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n",PEDR);
545 }
546
547 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
548 {
549 if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable) )
550 {
551 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
552 dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
553 corgi_goto_sleep(alarm_time, alarm_enable, state);
554 return 1;
555 }
556 if(sharpsl_off_charge_battery()) {
557 dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
558 corgi_goto_sleep(alarm_time, alarm_enable, state);
559 return 1;
560 }
561 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
562 }
563
564 if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) || (sharpsl_fatal_check() < 0) )
565 {
566 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
567 corgi_goto_sleep(alarm_time, alarm_enable, state);
568 return 1;
569 }
570
571 return 0;
572 }
573
574 static int corgi_pxa_pm_enter(suspend_state_t state)
575 {
576 unsigned long alarm_time = RTAR;
577 unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
578
579 dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
580
581 corgi_goto_sleep(alarm_time, alarm_status, state);
582
583 while (corgi_enter_suspend(alarm_time,alarm_status,state))
584 {}
585
586 if (sharpsl_pm.machinfo->earlyresume)
587 sharpsl_pm.machinfo->earlyresume();
588
589 dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
590
591 return 0;
592 }
593
594 /*
595 * Check for fatal battery errors
596 * Fatal returns -1
597 */
598 static int sharpsl_fatal_check(void)
599 {
600 int buff[5], temp, i, acin;
601
602 dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
603
604 /* Check AC-Adapter */
605 acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
606
607 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
608 sharpsl_pm.machinfo->charge(0);
609 udelay(100);
610 sharpsl_pm.machinfo->discharge(1); /* enable discharge */
611 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
612 }
613
614 if (sharpsl_pm.machinfo->discharge1)
615 sharpsl_pm.machinfo->discharge1(1);
616
617 /* Check battery : check inserting battery ? */
618 for (i=0; i<5; i++) {
619 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
620 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
621 }
622
623 if (sharpsl_pm.machinfo->discharge1)
624 sharpsl_pm.machinfo->discharge1(0);
625
626 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
627 udelay(100);
628 sharpsl_pm.machinfo->charge(1);
629 sharpsl_pm.machinfo->discharge(0);
630 }
631
632 temp = get_select_val(buff);
633 dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check: acin: %d, discharge voltage: %d, no discharge: %ld\n", acin, temp, sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT));
634
635 if ((acin && (temp < sharpsl_pm.machinfo->fatal_acin_volt)) ||
636 (!acin && (temp < sharpsl_pm.machinfo->fatal_noacin_volt)))
637 return -1;
638 return 0;
639 }
640
641 static int sharpsl_off_charge_error(void)
642 {
643 dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
644 sharpsl_pm.machinfo->charge(0);
645 sharpsl_pm_led(SHARPSL_LED_ERROR);
646 sharpsl_pm.charge_mode = CHRG_ERROR;
647 return 1;
648 }
649
650 /*
651 * Charging Control while suspended
652 * Return 1 - go straight to sleep
653 * Return 0 - sleep or wakeup depending on other factors
654 */
655 static int sharpsl_off_charge_battery(void)
656 {
657 int time;
658
659 dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
660
661 if (sharpsl_pm.charge_mode == CHRG_OFF) {
662 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
663
664 /* AC Check */
665 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
666 return sharpsl_off_charge_error();
667
668 /* Start Charging */
669 sharpsl_pm_led(SHARPSL_LED_ON);
670 sharpsl_pm.machinfo->charge(0);
671 mdelay(SHARPSL_CHARGE_WAIT_TIME);
672 sharpsl_pm.machinfo->charge(1);
673
674 sharpsl_pm.charge_mode = CHRG_ON;
675 sharpsl_pm.full_count = 0;
676
677 return 1;
678 } else if (sharpsl_pm.charge_mode != CHRG_ON) {
679 return 1;
680 }
681
682 if (sharpsl_pm.full_count == 0) {
683 int time;
684
685 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
686
687 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
688 return sharpsl_off_charge_error();
689
690 sharpsl_pm.machinfo->charge(0);
691 mdelay(SHARPSL_CHARGE_WAIT_TIME);
692 sharpsl_pm.machinfo->charge(1);
693 sharpsl_pm.charge_mode = CHRG_ON;
694
695 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
696
697 time = RCNR;
698 while(1) {
699 /* Check if any wakeup event had occurred */
700 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
701 return 0;
702 /* Check for timeout */
703 if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
704 return 1;
705 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
706 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
707 sharpsl_pm.full_count++;
708 sharpsl_pm.machinfo->charge(0);
709 mdelay(SHARPSL_CHARGE_WAIT_TIME);
710 sharpsl_pm.machinfo->charge(1);
711 return 1;
712 }
713 }
714 }
715
716 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
717
718 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
719
720 time = RCNR;
721 while(1) {
722 /* Check if any wakeup event had occurred */
723 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
724 return 0;
725 /* Check for timeout */
726 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
727 if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
728 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
729 sharpsl_pm.full_count = 0;
730 }
731 sharpsl_pm.full_count++;
732 return 1;
733 }
734 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
735 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
736 sharpsl_pm_led(SHARPSL_LED_OFF);
737 sharpsl_pm.machinfo->charge(0);
738 sharpsl_pm.charge_mode = CHRG_DONE;
739 return 1;
740 }
741 }
742 }
743 #else
744 #define sharpsl_pm_suspend NULL
745 #define sharpsl_pm_resume NULL
746 #endif
747
748 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
749 {
750 return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_percent);
751 }
752
753 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
754 {
755 return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_voltage);
756 }
757
758 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
759 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
760
761 extern void (*apm_get_power_status)(struct apm_power_info *);
762
763 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
764 {
765 info->ac_line_status = sharpsl_pm.battstat.ac_status;
766
767 if (sharpsl_pm.charge_mode == CHRG_ON)
768 info->battery_status = APM_BATTERY_STATUS_CHARGING;
769 else
770 info->battery_status = sharpsl_pm.battstat.mainbat_status;
771
772 info->battery_flag = (1 << info->battery_status);
773 info->battery_life = sharpsl_pm.battstat.mainbat_percent;
774 }
775
776 #ifdef CONFIG_PM
777 static struct platform_suspend_ops sharpsl_pm_ops = {
778 .enter = corgi_pxa_pm_enter,
779 .valid = suspend_valid_only_mem,
780 };
781 #endif
782
783 static int __init sharpsl_pm_probe(struct platform_device *pdev)
784 {
785 int ret;
786
787 if (!pdev->dev.platform_data)
788 return -EINVAL;
789
790 sharpsl_pm.dev = &pdev->dev;
791 sharpsl_pm.machinfo = pdev->dev.platform_data;
792 sharpsl_pm.charge_mode = CHRG_OFF;
793 sharpsl_pm.flags = 0;
794
795 init_timer(&sharpsl_pm.ac_timer);
796 sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
797
798 init_timer(&sharpsl_pm.chrg_full_timer);
799 sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
800
801 led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
802
803 sharpsl_pm.machinfo->init();
804
805 ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
806 ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
807 if (ret != 0)
808 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
809
810 apm_get_power_status = sharpsl_apm_get_power_status;
811
812 #ifdef CONFIG_PM
813 suspend_set_ops(&sharpsl_pm_ops);
814 #endif
815
816 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
817
818 return 0;
819 }
820
821 static int sharpsl_pm_remove(struct platform_device *pdev)
822 {
823 suspend_set_ops(NULL);
824
825 device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
826 device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
827
828 led_trigger_unregister_simple(sharpsl_charge_led_trigger);
829
830 sharpsl_pm.machinfo->exit();
831
832 del_timer_sync(&sharpsl_pm.chrg_full_timer);
833 del_timer_sync(&sharpsl_pm.ac_timer);
834
835 return 0;
836 }
837
838 static struct platform_driver sharpsl_pm_driver = {
839 .probe = sharpsl_pm_probe,
840 .remove = sharpsl_pm_remove,
841 .suspend = sharpsl_pm_suspend,
842 .resume = sharpsl_pm_resume,
843 .driver = {
844 .name = "sharpsl-pm",
845 },
846 };
847
848 static int __devinit sharpsl_pm_init(void)
849 {
850 return platform_driver_register(&sharpsl_pm_driver);
851 }
852
853 static void sharpsl_pm_exit(void)
854 {
855 platform_driver_unregister(&sharpsl_pm_driver);
856 }
857
858 late_initcall(sharpsl_pm_init);
859 module_exit(sharpsl_pm_exit);
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