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