PM: Move definition of struct pm_ops to suspend.h
[linux-2.6.git] / arch / arm / common / sharpsl_pm.c
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 <asm/hardware.h>
30 #include <asm/mach-types.h>
31 #include <asm/irq.h>
32 #include <asm/arch/pm.h>
33 #include <asm/arch/pxa-regs.h>
34 #include <asm/arch/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 static int sharpsl_off_charge_battery(void);
58 static int sharpsl_check_battery_temp(void);
59 static int sharpsl_check_battery_voltage(void);
60 static int sharpsl_ac_check(void);
61 static int sharpsl_fatal_check(void);
62 static int sharpsl_average_value(int ad);
63 static void sharpsl_average_clear(void);
64 static void sharpsl_charge_toggle(struct work_struct *private_);
65 static void sharpsl_battery_thread(struct work_struct *private_);
66
67
68 /*
69  * Variables
70  */
71 struct sharpsl_pm_status sharpsl_pm;
72 DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
73 DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
74 DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
75
76
77 static int get_percentage(int voltage)
78 {
79         int i = sharpsl_pm.machinfo->bat_levels - 1;
80         int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
81         struct battery_thresh *thresh;
82
83         if (sharpsl_pm.charge_mode == CHRG_ON)
84                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
85         else
86                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
87
88         while (i > 0 && (voltage > thresh[i].voltage))
89                 i--;
90
91         return thresh[i].percentage;
92 }
93
94 static int get_apm_status(int voltage)
95 {
96         int low_thresh, high_thresh;
97
98         if (sharpsl_pm.charge_mode == CHRG_ON) {
99                 high_thresh = sharpsl_pm.machinfo->status_high_acin;
100                 low_thresh = sharpsl_pm.machinfo->status_low_acin;
101         } else {
102                 high_thresh = sharpsl_pm.machinfo->status_high_noac;
103                 low_thresh = sharpsl_pm.machinfo->status_low_noac;
104         }
105
106         if (voltage >= high_thresh)
107                 return APM_BATTERY_STATUS_HIGH;
108         if (voltage >= low_thresh)
109                 return APM_BATTERY_STATUS_LOW;
110         return APM_BATTERY_STATUS_CRITICAL;
111 }
112
113 void sharpsl_battery_kick(void)
114 {
115         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
116 }
117 EXPORT_SYMBOL(sharpsl_battery_kick);
118
119
120 static void sharpsl_battery_thread(struct work_struct *private_)
121 {
122         int voltage, percent, apm_status, i = 0;
123
124         if (!sharpsl_pm.machinfo)
125                 return;
126
127         sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
128
129         /* Corgi cannot confirm when battery fully charged so periodically kick! */
130         if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
131                         && time_after(jiffies, sharpsl_pm.charge_start_time +  SHARPSL_CHARGE_ON_TIME_INTERVAL))
132                 schedule_delayed_work(&toggle_charger, 0);
133
134         while(1) {
135                 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
136
137                 if (voltage > 0) break;
138                 if (i++ > 5) {
139                         voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
140                         dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
141                         break;
142                 }
143         }
144
145         voltage = sharpsl_average_value(voltage);
146         apm_status = get_apm_status(voltage);
147         percent = get_percentage(voltage);
148
149         /* At low battery voltages, the voltage has a tendency to start
150            creeping back up so we try to avoid this here */
151         if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE) || (apm_status == APM_BATTERY_STATUS_HIGH) ||  percent <= sharpsl_pm.battstat.mainbat_percent) {
152                 sharpsl_pm.battstat.mainbat_voltage = voltage;
153                 sharpsl_pm.battstat.mainbat_status = apm_status;
154                 sharpsl_pm.battstat.mainbat_percent = percent;
155         }
156
157         dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
158                         sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
159
160         /* If battery is low. limit backlight intensity to save power. */
161         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
162                         && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW) ||
163                         (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
164                 if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
165                         sharpsl_pm.machinfo->backlight_limit(1);
166                         sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
167                 }
168         } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
169                 sharpsl_pm.machinfo->backlight_limit(0);
170                 sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
171         }
172
173         /* Suspend if critical battery level */
174         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
175                         && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
176                         && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
177                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
178                 dev_err(sharpsl_pm.dev, "Fatal Off\n");
179                 apm_queue_event(APM_CRITICAL_SUSPEND);
180         }
181
182         schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
183 }
184
185 void sharpsl_pm_led(int val)
186 {
187         if (val == SHARPSL_LED_ERROR) {
188                 dev_err(sharpsl_pm.dev, "Charging Error!\n");
189         } else if (val == SHARPSL_LED_ON) {
190                 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
191                 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
192         } else {
193                 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
194                 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
195         }
196 }
197
198 static void sharpsl_charge_on(void)
199 {
200         dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
201
202         sharpsl_pm.full_count = 0;
203         sharpsl_pm.charge_mode = CHRG_ON;
204         schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
205         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
206 }
207
208 static void sharpsl_charge_off(void)
209 {
210         dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
211
212         sharpsl_pm.machinfo->charge(0);
213         sharpsl_pm_led(SHARPSL_LED_OFF);
214         sharpsl_pm.charge_mode = CHRG_OFF;
215
216         schedule_delayed_work(&sharpsl_bat, 0);
217 }
218
219 static void sharpsl_charge_error(void)
220 {
221         sharpsl_pm_led(SHARPSL_LED_ERROR);
222         sharpsl_pm.machinfo->charge(0);
223         sharpsl_pm.charge_mode = CHRG_ERROR;
224 }
225
226 static void sharpsl_charge_toggle(struct work_struct *private_)
227 {
228         dev_dbg(sharpsl_pm.dev, "Toogling Charger at time: %lx\n", jiffies);
229
230         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
231                 sharpsl_charge_off();
232                 return;
233         } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
234                 sharpsl_charge_error();
235                 return;
236         }
237
238         sharpsl_pm_led(SHARPSL_LED_ON);
239         sharpsl_pm.machinfo->charge(0);
240         mdelay(SHARPSL_CHARGE_WAIT_TIME);
241         sharpsl_pm.machinfo->charge(1);
242
243         sharpsl_pm.charge_start_time = jiffies;
244 }
245
246 static void sharpsl_ac_timer(unsigned long data)
247 {
248         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
249
250         dev_dbg(sharpsl_pm.dev, "AC Status: %d\n",acin);
251
252         sharpsl_average_clear();
253         if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
254                 sharpsl_charge_on();
255         else if (sharpsl_pm.charge_mode == CHRG_ON)
256                 sharpsl_charge_off();
257
258         schedule_delayed_work(&sharpsl_bat, 0);
259 }
260
261
262 irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
263 {
264         /* Delay the event slightly to debounce */
265         /* Must be a smaller delay than the chrg_full_isr below */
266         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
267
268         return IRQ_HANDLED;
269 }
270
271 static void sharpsl_chrg_full_timer(unsigned long data)
272 {
273         dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
274
275         sharpsl_pm.full_count++;
276
277         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
278                 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
279                 if (sharpsl_pm.charge_mode == CHRG_ON)
280                         sharpsl_charge_off();
281         } else if (sharpsl_pm.full_count < 2) {
282                 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
283                 schedule_delayed_work(&toggle_charger, 0);
284         } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
285                 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
286                 schedule_delayed_work(&toggle_charger, 0);
287         } else {
288                 sharpsl_charge_off();
289                 sharpsl_pm.charge_mode = CHRG_DONE;
290                 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
291         }
292 }
293
294 /* Charging Finished Interrupt (Not present on Corgi) */
295 /* Can trigger at the same time as an AC status change so
296    delay until after that has been processed */
297 irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
298 {
299         if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
300                 return IRQ_HANDLED;
301
302         /* delay until after any ac interrupt */
303         mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
304
305         return IRQ_HANDLED;
306 }
307
308 irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
309 {
310         int is_fatal = 0;
311
312         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
313                 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
314                 is_fatal = 1;
315         }
316
317         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
318                 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
319                 is_fatal = 1;
320         }
321
322         if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
323                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
324                 apm_queue_event(APM_CRITICAL_SUSPEND);
325         }
326
327         return IRQ_HANDLED;
328 }
329
330 /*
331  * Maintain an average of the last 10 readings
332  */
333 #define SHARPSL_CNV_VALUE_NUM    10
334 static int sharpsl_ad_index;
335
336 static void sharpsl_average_clear(void)
337 {
338         sharpsl_ad_index = 0;
339 }
340
341 static int sharpsl_average_value(int ad)
342 {
343         int i, ad_val = 0;
344         static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
345
346         if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
347                 sharpsl_ad_index = 0;
348                 return ad;
349         }
350
351         sharpsl_ad[sharpsl_ad_index] = ad;
352         sharpsl_ad_index++;
353         if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
354                 for (i=0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
355                         sharpsl_ad[i] = sharpsl_ad[i+1];
356                 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
357         }
358         for (i=0; i < sharpsl_ad_index; i++)
359                 ad_val += sharpsl_ad[i];
360
361         return (ad_val / sharpsl_ad_index);
362 }
363
364 /*
365  * Take an array of 5 integers, remove the maximum and minimum values
366  * and return the average.
367  */
368 static int get_select_val(int *val)
369 {
370         int i, j, k, temp, sum = 0;
371
372         /* Find MAX val */
373         temp = val[0];
374         j=0;
375         for (i=1; i<5; i++) {
376                 if (temp < val[i]) {
377                         temp = val[i];
378                         j = i;
379                 }
380         }
381
382         /* Find MIN val */
383         temp = val[4];
384         k=4;
385         for (i=3; i>=0; i--) {
386                 if (temp > val[i]) {
387                         temp = val[i];
388                         k = i;
389                 }
390         }
391
392         for (i=0; i<5; i++)
393                 if (i != j && i != k )
394                         sum += val[i];
395
396         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]);
397
398         return (sum/3);
399 }
400
401 static int sharpsl_check_battery_temp(void)
402 {
403         int val, i, buff[5];
404
405         /* Check battery temperature */
406         for (i=0; i<5; i++) {
407                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
408                 sharpsl_pm.machinfo->measure_temp(1);
409                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
410                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
411                 sharpsl_pm.machinfo->measure_temp(0);
412         }
413
414         val = get_select_val(buff);
415
416         dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
417         if (val > sharpsl_pm.machinfo->charge_on_temp) {
418                 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
419                 return -1;
420         }
421
422         return 0;
423 }
424
425 static int sharpsl_check_battery_voltage(void)
426 {
427         int val, i, buff[5];
428
429         /* disable charge, enable discharge */
430         sharpsl_pm.machinfo->charge(0);
431         sharpsl_pm.machinfo->discharge(1);
432         mdelay(SHARPSL_WAIT_DISCHARGE_ON);
433
434         if (sharpsl_pm.machinfo->discharge1)
435                 sharpsl_pm.machinfo->discharge1(1);
436
437         /* Check battery voltage */
438         for (i=0; i<5; i++) {
439                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
440                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
441         }
442
443         if (sharpsl_pm.machinfo->discharge1)
444                 sharpsl_pm.machinfo->discharge1(0);
445
446         sharpsl_pm.machinfo->discharge(0);
447
448         val = get_select_val(buff);
449         dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
450
451         if (val < sharpsl_pm.machinfo->charge_on_volt)
452                 return -1;
453
454         return 0;
455 }
456
457 static int sharpsl_ac_check(void)
458 {
459         int temp, i, buff[5];
460
461         for (i=0; i<5; i++) {
462                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
463                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
464         }
465
466         temp = get_select_val(buff);
467         dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n",temp);
468
469         if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
470                 dev_err(sharpsl_pm.dev, "Error: AC check failed.\n");
471                 return -1;
472         }
473
474         return 0;
475 }
476
477 #ifdef CONFIG_PM
478 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
479 {
480         sharpsl_pm.flags |= SHARPSL_SUSPENDED;
481         flush_scheduled_work();
482
483         if (sharpsl_pm.charge_mode == CHRG_ON)
484                 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
485         else
486                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
487
488         return 0;
489 }
490
491 static int sharpsl_pm_resume(struct platform_device *pdev)
492 {
493         /* Clear the reset source indicators as they break the bootloader upon reboot */
494         RCSR = 0x0f;
495         sharpsl_average_clear();
496         sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
497         sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
498
499         return 0;
500 }
501
502 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
503 {
504         dev_dbg(sharpsl_pm.dev, "Time is: %08x\n",RCNR);
505
506         dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n",sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
507         /* not charging and AC-IN! */
508
509         if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
510                 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
511                 sharpsl_pm.charge_mode = CHRG_OFF;
512                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
513                 sharpsl_off_charge_battery();
514         }
515
516         sharpsl_pm.machinfo->presuspend();
517
518         PEDR = 0xffffffff; /* clear it */
519
520         sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
521         if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
522                 RTSR &= RTSR_ALE;
523                 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
524                 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n",RTAR);
525                 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
526         } else if (alarm_enable) {
527                 RTSR &= RTSR_ALE;
528                 RTAR = alarm_time;
529                 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n",RTAR);
530         } else {
531                 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
532         }
533
534         pxa_pm_enter(state);
535
536         sharpsl_pm.machinfo->postsuspend();
537
538         dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n",PEDR);
539 }
540
541 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
542 {
543         if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable) )
544         {
545                 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
546                         dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
547                         corgi_goto_sleep(alarm_time, alarm_enable, state);
548                         return 1;
549                 }
550                 if(sharpsl_off_charge_battery()) {
551                         dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
552                         corgi_goto_sleep(alarm_time, alarm_enable, state);
553                         return 1;
554                 }
555                 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
556         }
557
558         if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) || (sharpsl_fatal_check() < 0) )
559         {
560                 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
561                 corgi_goto_sleep(alarm_time, alarm_enable, state);
562                 return 1;
563         }
564
565         return 0;
566 }
567
568 static int corgi_pxa_pm_enter(suspend_state_t state)
569 {
570         unsigned long alarm_time = RTAR;
571         unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
572
573         dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
574
575         corgi_goto_sleep(alarm_time, alarm_status, state);
576
577         while (corgi_enter_suspend(alarm_time,alarm_status,state))
578                 {}
579
580         if (sharpsl_pm.machinfo->earlyresume)
581                 sharpsl_pm.machinfo->earlyresume();
582
583         dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
584
585         return 0;
586 }
587 #endif
588
589
590 /*
591  * Check for fatal battery errors
592  * Fatal returns -1
593  */
594 static int sharpsl_fatal_check(void)
595 {
596         int buff[5], temp, i, acin;
597
598         dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
599
600         /* Check AC-Adapter */
601         acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
602
603         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
604                 sharpsl_pm.machinfo->charge(0);
605                 udelay(100);
606                 sharpsl_pm.machinfo->discharge(1);      /* enable discharge */
607                 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
608         }
609
610         if (sharpsl_pm.machinfo->discharge1)
611                 sharpsl_pm.machinfo->discharge1(1);
612
613         /* Check battery : check inserting battery ? */
614         for (i=0; i<5; i++) {
615                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
616                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
617         }
618
619         if (sharpsl_pm.machinfo->discharge1)
620                 sharpsl_pm.machinfo->discharge1(0);
621
622         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
623                 udelay(100);
624                 sharpsl_pm.machinfo->charge(1);
625                 sharpsl_pm.machinfo->discharge(0);
626         }
627
628         temp = get_select_val(buff);
629         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));
630
631         if ((acin && (temp < sharpsl_pm.machinfo->fatal_acin_volt)) ||
632                         (!acin && (temp < sharpsl_pm.machinfo->fatal_noacin_volt)))
633                 return -1;
634         return 0;
635 }
636
637 static int sharpsl_off_charge_error(void)
638 {
639         dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
640         sharpsl_pm.machinfo->charge(0);
641         sharpsl_pm_led(SHARPSL_LED_ERROR);
642         sharpsl_pm.charge_mode = CHRG_ERROR;
643         return 1;
644 }
645
646 /*
647  * Charging Control while suspended
648  * Return 1 - go straight to sleep
649  * Return 0 - sleep or wakeup depending on other factors
650  */
651 static int sharpsl_off_charge_battery(void)
652 {
653         int time;
654
655         dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
656
657         if (sharpsl_pm.charge_mode == CHRG_OFF) {
658                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
659
660                 /* AC Check */
661                 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
662                         return sharpsl_off_charge_error();
663
664                 /* Start Charging */
665                 sharpsl_pm_led(SHARPSL_LED_ON);
666                 sharpsl_pm.machinfo->charge(0);
667                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
668                 sharpsl_pm.machinfo->charge(1);
669
670                 sharpsl_pm.charge_mode = CHRG_ON;
671                 sharpsl_pm.full_count = 0;
672
673                 return 1;
674         } else if (sharpsl_pm.charge_mode != CHRG_ON) {
675                 return 1;
676         }
677
678         if (sharpsl_pm.full_count == 0) {
679                 int time;
680
681                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
682
683                 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
684                         return sharpsl_off_charge_error();
685
686                 sharpsl_pm.machinfo->charge(0);
687                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
688                 sharpsl_pm.machinfo->charge(1);
689                 sharpsl_pm.charge_mode = CHRG_ON;
690
691                 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
692
693                 time = RCNR;
694                 while(1) {
695                         /* Check if any wakeup event had occurred */
696                         if (sharpsl_pm.machinfo->charger_wakeup() != 0)
697                                 return 0;
698                         /* Check for timeout */
699                         if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
700                                 return 1;
701                         if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
702                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
703                                 sharpsl_pm.full_count++;
704                                 sharpsl_pm.machinfo->charge(0);
705                                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
706                                 sharpsl_pm.machinfo->charge(1);
707                                 return 1;
708                         }
709                 }
710         }
711
712         dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
713
714         mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
715
716         time = RCNR;
717         while(1) {
718                 /* Check if any wakeup event had occurred */
719                 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
720                         return 0;
721                 /* Check for timeout */
722                 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
723                         if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
724                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
725                                 sharpsl_pm.full_count = 0;
726                         }
727                         sharpsl_pm.full_count++;
728                         return 1;
729                 }
730                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
731                         dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
732                         sharpsl_pm_led(SHARPSL_LED_OFF);
733                         sharpsl_pm.machinfo->charge(0);
734                         sharpsl_pm.charge_mode = CHRG_DONE;
735                         return 1;
736                 }
737         }
738 }
739
740
741 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
742 {
743         return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_percent);
744 }
745
746 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
747 {
748         return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_voltage);
749 }
750
751 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
752 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
753
754 extern void (*apm_get_power_status)(struct apm_power_info *);
755
756 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
757 {
758         info->ac_line_status = sharpsl_pm.battstat.ac_status;
759
760         if (sharpsl_pm.charge_mode == CHRG_ON)
761                 info->battery_status = APM_BATTERY_STATUS_CHARGING;
762         else
763                 info->battery_status = sharpsl_pm.battstat.mainbat_status;
764
765         info->battery_flag = (1 << info->battery_status);
766         info->battery_life = sharpsl_pm.battstat.mainbat_percent;
767 }
768
769 static struct pm_ops sharpsl_pm_ops = {
770         .enter          = corgi_pxa_pm_enter,
771         .valid          = pm_valid_only_mem,
772 };
773
774 static int __init sharpsl_pm_probe(struct platform_device *pdev)
775 {
776         int ret;
777
778         if (!pdev->dev.platform_data)
779                 return -EINVAL;
780
781         sharpsl_pm.dev = &pdev->dev;
782         sharpsl_pm.machinfo = pdev->dev.platform_data;
783         sharpsl_pm.charge_mode = CHRG_OFF;
784         sharpsl_pm.flags = 0;
785
786         init_timer(&sharpsl_pm.ac_timer);
787         sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
788
789         init_timer(&sharpsl_pm.chrg_full_timer);
790         sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
791
792         led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
793
794         sharpsl_pm.machinfo->init();
795
796         ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
797         ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
798         if (ret != 0)
799                 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
800
801         apm_get_power_status = sharpsl_apm_get_power_status;
802
803         pm_set_ops(&sharpsl_pm_ops);
804
805         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
806
807         return 0;
808 }
809
810 static int sharpsl_pm_remove(struct platform_device *pdev)
811 {
812         pm_set_ops(NULL);
813
814         device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
815         device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
816
817         led_trigger_unregister_simple(sharpsl_charge_led_trigger);
818
819         sharpsl_pm.machinfo->exit();
820
821         del_timer_sync(&sharpsl_pm.chrg_full_timer);
822         del_timer_sync(&sharpsl_pm.ac_timer);
823
824         return 0;
825 }
826
827 static struct platform_driver sharpsl_pm_driver = {
828         .probe          = sharpsl_pm_probe,
829         .remove         = sharpsl_pm_remove,
830         .suspend        = sharpsl_pm_suspend,
831         .resume         = sharpsl_pm_resume,
832         .driver         = {
833                 .name           = "sharpsl-pm",
834         },
835 };
836
837 static int __devinit sharpsl_pm_init(void)
838 {
839         return platform_driver_register(&sharpsl_pm_driver);
840 }
841
842 static void sharpsl_pm_exit(void)
843 {
844         platform_driver_unregister(&sharpsl_pm_driver);
845 }
846
847 late_initcall(sharpsl_pm_init);
848 module_exit(sharpsl_pm_exit);