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[ARM] pxa: Fix PXA27x suspend type validation, remove pxa_pm_prepare()
[mirror_ubuntu-kernels.git] / arch / arm / common / sharpsl_pm.c
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b7557de4
RP		 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>
181bf8aa 25#include <linux/leds.h>
d608e52c 26#include <linux/apm-emulation.h>
b7557de4
RP		 27
28#include <asm/hardware.h>
29#include <asm/mach-types.h>
30#include <asm/irq.h>
b7557de4
RP		 31#include <asm/arch/pm.h>
32#include <asm/arch/pxa-regs.h>
33#include <asm/arch/sharpsl.h>
34#include <asm/hardware/sharpsl_pm.h>
35
36/*
37 * Constants
38 */
39#define SHARPSL_CHARGE_ON_TIME_INTERVAL (msecs_to_jiffies(1*60*1000)) /* 1 min */
40#define SHARPSL_CHARGE_FINISH_TIME (msecs_to_jiffies(10*60*1000)) /* 10 min */
41#define SHARPSL_BATCHK_TIME (msecs_to_jiffies(15*1000)) /* 15 sec */
42#define SHARPSL_BATCHK_TIME_SUSPEND (60*10) /* 10 min */
576b3ef2 43
b7557de4
RP		 44#define SHARPSL_WAIT_CO_TIME 15 /* 15 sec */
45#define SHARPSL_WAIT_DISCHARGE_ON 100 /* 100 msec */
46#define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP 10 /* 10 msec */
47#define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT 10 /* 10 msec */
48#define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN 10 /* 10 msec */
49#define SHARPSL_CHARGE_WAIT_TIME 15 /* 15 msec */
50#define SHARPSL_CHARGE_CO_CHECK_TIME 5 /* 5 msec */
51#define SHARPSL_CHARGE_RETRY_CNT 1 /* eqv. 10 min */
52
b7557de4
RP		 53/*
54 * Prototypes
55 */
56static int sharpsl_off_charge_battery(void);
57static int sharpsl_check_battery_temp(void);
58static int sharpsl_check_battery_voltage(void);
59static int sharpsl_ac_check(void);
60static int sharpsl_fatal_check(void);
61static int sharpsl_average_value(int ad);
62static void sharpsl_average_clear(void);
6d5aefb8
DH		 63static void sharpsl_charge_toggle(struct work_struct *private_);
64static void sharpsl_battery_thread(struct work_struct *private_);
b7557de4
RP		 65
66
67/*
68 * Variables
69 */
70struct sharpsl_pm_status sharpsl_pm;
6d5aefb8
DH		 71DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
72DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
181bf8aa 73DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
b7557de4
RP		 74
75
76static int get_percentage(int voltage)
77{
78 int i = sharpsl_pm.machinfo->bat_levels - 1;
f8703dc8 79 int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
b7557de4
RP		 80 struct battery_thresh *thresh;
81
82 if (sharpsl_pm.charge_mode == CHRG_ON)
f8703dc8 83 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
b7557de4 84 else
f8703dc8 85 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
b7557de4
RP		 86
87 while (i > 0 && (voltage > thresh[i].voltage))
88 i--;
89
90 return thresh[i].percentage;
91}
92
93static int get_apm_status(int voltage)
94{
95 int low_thresh, high_thresh;
96
97 if (sharpsl_pm.charge_mode == CHRG_ON) {
98 high_thresh = sharpsl_pm.machinfo->status_high_acin;
99 low_thresh = sharpsl_pm.machinfo->status_low_acin;
100 } else {
101 high_thresh = sharpsl_pm.machinfo->status_high_noac;
102 low_thresh = sharpsl_pm.machinfo->status_low_noac;
103 }
104
105 if (voltage >= high_thresh)
106 return APM_BATTERY_STATUS_HIGH;
107 if (voltage >= low_thresh)
108 return APM_BATTERY_STATUS_LOW;
109 return APM_BATTERY_STATUS_CRITICAL;
110}
111
112void sharpsl_battery_kick(void)
113{
114 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
115}
116EXPORT_SYMBOL(sharpsl_battery_kick);
117
118
6d5aefb8 119static void sharpsl_battery_thread(struct work_struct *private_)
b7557de4
RP		 120{
121 int voltage, percent, apm_status, i = 0;
122
123 if (!sharpsl_pm.machinfo)
124 return;
125
126 sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
127
128 /* Corgi cannot confirm when battery fully charged so periodically kick! */
f8703dc8 129 if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
b7557de4 130 && time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_ON_TIME_INTERVAL))
6d5aefb8 131 schedule_delayed_work(&toggle_charger, 0);
b7557de4
RP		 132
133 while(1) {
134 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
135
136 if (voltage > 0) break;
137 if (i++ > 5) {
138 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
139 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
140 break;
141 }
142 }
143
144 voltage = sharpsl_average_value(voltage);
145 apm_status = get_apm_status(voltage);
146 percent = get_percentage(voltage);
147
148 /* At low battery voltages, the voltage has a tendency to start
149 creeping back up so we try to avoid this here */
150 if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE) || (apm_status == APM_BATTERY_STATUS_HIGH) || percent <= sharpsl_pm.battstat.mainbat_percent) {
151 sharpsl_pm.battstat.mainbat_voltage = voltage;
152 sharpsl_pm.battstat.mainbat_status = apm_status;
153 sharpsl_pm.battstat.mainbat_percent = percent;
154 }
155
aceb6f0b 156 dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
b7557de4
RP		 157 sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
158
159 /* If battery is low. limit backlight intensity to save power. */
160 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
161 && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW) ||
162 (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
163 if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
f8703dc8 164 sharpsl_pm.machinfo->backlight_limit(1);
b7557de4
RP		 165 sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
166 }
167 } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
f8703dc8 168 sharpsl_pm.machinfo->backlight_limit(0);
b7557de4
RP		 169 sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
170 }
171
172 /* Suspend if critical battery level */
173 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
174 && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
175 && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
176 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
177 dev_err(sharpsl_pm.dev, "Fatal Off\n");
178 apm_queue_event(APM_CRITICAL_SUSPEND);
179 }
180
181 schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
182}
183
184void sharpsl_pm_led(int val)
185{
186 if (val == SHARPSL_LED_ERROR) {
187 dev_err(sharpsl_pm.dev, "Charging Error!\n");
188 } else if (val == SHARPSL_LED_ON) {
189 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
181bf8aa 190 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
b7557de4
RP		 191 } else {
192 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
181bf8aa 193 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
b7557de4
RP		 194 }
195}
196
197static void sharpsl_charge_on(void)
198{
199 dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
200
201 sharpsl_pm.full_count = 0;
202 sharpsl_pm.charge_mode = CHRG_ON;
203 schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
204 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
205}
206
207static void sharpsl_charge_off(void)
208{
209 dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
210
211 sharpsl_pm.machinfo->charge(0);
212 sharpsl_pm_led(SHARPSL_LED_OFF);
213 sharpsl_pm.charge_mode = CHRG_OFF;
214
6d5aefb8 215 schedule_delayed_work(&sharpsl_bat, 0);
b7557de4
RP		 216}
217
218static void sharpsl_charge_error(void)
219{
220 sharpsl_pm_led(SHARPSL_LED_ERROR);
221 sharpsl_pm.machinfo->charge(0);
222 sharpsl_pm.charge_mode = CHRG_ERROR;
223}
224
6d5aefb8 225static void sharpsl_charge_toggle(struct work_struct *private_)
b7557de4
RP		 226{
227 dev_dbg(sharpsl_pm.dev, "Toogling Charger at time: %lx\n", jiffies);
228
229 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
230 sharpsl_charge_off();
231 return;
232 } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
233 sharpsl_charge_error();
234 return;
235 }
236
237 sharpsl_pm_led(SHARPSL_LED_ON);
238 sharpsl_pm.machinfo->charge(0);
239 mdelay(SHARPSL_CHARGE_WAIT_TIME);
240 sharpsl_pm.machinfo->charge(1);
241
242 sharpsl_pm.charge_start_time = jiffies;
243}
244
245static void sharpsl_ac_timer(unsigned long data)
246{
247 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
248
249 dev_dbg(sharpsl_pm.dev, "AC Status: %d\n",acin);
250
251 sharpsl_average_clear();
252 if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
253 sharpsl_charge_on();
254 else if (sharpsl_pm.charge_mode == CHRG_ON)
255 sharpsl_charge_off();
256
6d5aefb8 257 schedule_delayed_work(&sharpsl_bat, 0);
b7557de4
RP		 258}
259
260
0cd61b68 261irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
b7557de4
RP		 262{
263 /* Delay the event slightly to debounce */
264 /* Must be a smaller delay than the chrg_full_isr below */
265 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
266
267 return IRQ_HANDLED;
268}
269
270static void sharpsl_chrg_full_timer(unsigned long data)
271{
272 dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
273
274 sharpsl_pm.full_count++;
275
276 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
277 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
278 if (sharpsl_pm.charge_mode == CHRG_ON)
279 sharpsl_charge_off();
280 } else if (sharpsl_pm.full_count < 2) {
281 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
6d5aefb8 282 schedule_delayed_work(&toggle_charger, 0);
b7557de4
RP		 283 } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
284 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
6d5aefb8 285 schedule_delayed_work(&toggle_charger, 0);
b7557de4
RP		 286 } else {
287 sharpsl_charge_off();
288 sharpsl_pm.charge_mode = CHRG_DONE;
289 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
290 }
291}
292
293/* Charging Finished Interrupt (Not present on Corgi) */
6cbdc8c5 294/* Can trigger at the same time as an AC status change so
b7557de4 295 delay until after that has been processed */
0cd61b68 296irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
b7557de4
RP		 297{
298 if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
299 return IRQ_HANDLED;
300
301 /* delay until after any ac interrupt */
302 mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
303
304 return IRQ_HANDLED;
305}
306
0cd61b68 307irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
b7557de4
RP		 308{
309 int is_fatal = 0;
310
311 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
312 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
313 is_fatal = 1;
314 }
315
316 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
317 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
318 is_fatal = 1;
319 }
320
321 if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
322 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
323 apm_queue_event(APM_CRITICAL_SUSPEND);
324 }
325
326 return IRQ_HANDLED;
327}
328
329/*
330 * Maintain an average of the last 10 readings
331 */
332#define SHARPSL_CNV_VALUE_NUM 10
333static int sharpsl_ad_index;
334
335static void sharpsl_average_clear(void)
336{
337 sharpsl_ad_index = 0;
338}
339
340static int sharpsl_average_value(int ad)
341{
342 int i, ad_val = 0;
343 static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
344
345 if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
346 sharpsl_ad_index = 0;
347 return ad;
348 }
349
350 sharpsl_ad[sharpsl_ad_index] = ad;
351 sharpsl_ad_index++;
352 if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
353 for (i=0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
354 sharpsl_ad[i] = sharpsl_ad[i+1];
355 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
356 }
357 for (i=0; i < sharpsl_ad_index; i++)
358 ad_val += sharpsl_ad[i];
359
360 return (ad_val / sharpsl_ad_index);
361}
362
363/*
364 * Take an array of 5 integers, remove the maximum and minimum values
365 * and return the average.
366 */
367static int get_select_val(int *val)
368{
369 int i, j, k, temp, sum = 0;
370
371 /* Find MAX val */
372 temp = val[0];
373 j=0;
374 for (i=1; i<5; i++) {
375 if (temp < val[i]) {
376 temp = val[i];
377 j = i;
378 }
379 }
380
381 /* Find MIN val */
382 temp = val[4];
383 k=4;
384 for (i=3; i>=0; i--) {
385 if (temp > val[i]) {
386 temp = val[i];
387 k = i;
388 }
389 }
390
391 for (i=0; i<5; i++)
392 if (i != j && i != k )
393 sum += val[i];
394
395 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]);
396
397 return (sum/3);
398}
399
400static int sharpsl_check_battery_temp(void)
401{
402 int val, i, buff[5];
403
404 /* Check battery temperature */
405 for (i=0; i<5; i++) {
406 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
407 sharpsl_pm.machinfo->measure_temp(1);
408 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
409 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
410 sharpsl_pm.machinfo->measure_temp(0);
411 }
412
413 val = get_select_val(buff);
414
415 dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
2704f0e6
PM		 416 if (val > sharpsl_pm.machinfo->charge_on_temp) {
417 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
b7557de4 418 return -1;
2704f0e6 419 }
b7557de4
RP		 420
421 return 0;
422}
423
424static int sharpsl_check_battery_voltage(void)
425{
426 int val, i, buff[5];
427
428 /* disable charge, enable discharge */
429 sharpsl_pm.machinfo->charge(0);
430 sharpsl_pm.machinfo->discharge(1);
431 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
432
433 if (sharpsl_pm.machinfo->discharge1)
434 sharpsl_pm.machinfo->discharge1(1);
435
436 /* Check battery voltage */
437 for (i=0; i<5; i++) {
438 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
439 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
440 }
441
442 if (sharpsl_pm.machinfo->discharge1)
443 sharpsl_pm.machinfo->discharge1(0);
444
445 sharpsl_pm.machinfo->discharge(0);
446
447 val = get_select_val(buff);
448 dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
449
f8703dc8 450 if (val < sharpsl_pm.machinfo->charge_on_volt)
b7557de4
RP		 451 return -1;
452
453 return 0;
454}
455
456static int sharpsl_ac_check(void)
457{
458 int temp, i, buff[5];
459
460 for (i=0; i<5; i++) {
461 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
462 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
463 }
464
465 temp = get_select_val(buff);
466 dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n",temp);
467
f8703dc8 468 if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
b7557de4
RP		 469 dev_err(sharpsl_pm.dev, "Error: AC check failed.\n");
470 return -1;
471 }
472
473 return 0;
474}
475
476#ifdef CONFIG_PM
477static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
478{
479 sharpsl_pm.flags |= SHARPSL_SUSPENDED;
480 flush_scheduled_work();
481
482 if (sharpsl_pm.charge_mode == CHRG_ON)
483 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
484 else
485 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
486
487 return 0;
488}
489
490static int sharpsl_pm_resume(struct platform_device *pdev)
491{
492 /* Clear the reset source indicators as they break the bootloader upon reboot */
493 RCSR = 0x0f;
494 sharpsl_average_clear();
495 sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
496 sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
497
498 return 0;
499}
500
501static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
502{
503 dev_dbg(sharpsl_pm.dev, "Time is: %08x\n",RCNR);
504
505 dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n",sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
506 /* not charging and AC-IN! */
507
508 if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
509 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
510 sharpsl_pm.charge_mode = CHRG_OFF;
511 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
512 sharpsl_off_charge_battery();
513 }
514
515 sharpsl_pm.machinfo->presuspend();
516
517 PEDR = 0xffffffff; /* clear it */
518
519 sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
520 if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
521 RTSR &= RTSR_ALE;
522 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
523 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n",RTAR);
524 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
525 } else if (alarm_enable) {
526 RTSR &= RTSR_ALE;
527 RTAR = alarm_time;
528 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n",RTAR);
529 } else {
530 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
531 }
532
533 pxa_pm_enter(state);
534
535 sharpsl_pm.machinfo->postsuspend();
536
537 dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n",PEDR);
538}
539
540static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
541{
542 if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable) )
543 {
544 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
545 dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
546 corgi_goto_sleep(alarm_time, alarm_enable, state);
547 return 1;
548 }
549 if(sharpsl_off_charge_battery()) {
550 dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
551 corgi_goto_sleep(alarm_time, alarm_enable, state);
552 return 1;
553 }
554 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
555 }
556
557 if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) || (sharpsl_fatal_check() < 0) )
558 {
559 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
560 corgi_goto_sleep(alarm_time, alarm_enable, state);
561 return 1;
562 }
563
564 return 0;
565}
566
567static int corgi_pxa_pm_enter(suspend_state_t state)
568{
569 unsigned long alarm_time = RTAR;
570 unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
571
572 dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
573
574 corgi_goto_sleep(alarm_time, alarm_status, state);
575
576 while (corgi_enter_suspend(alarm_time,alarm_status,state))
577 {}
578
576b3ef2
DO		 579 if (sharpsl_pm.machinfo->earlyresume)
580 sharpsl_pm.machinfo->earlyresume();
581
b7557de4
RP		 582 dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
583
584 return 0;
585}
586#endif
587
588
589/*
590 * Check for fatal battery errors
591 * Fatal returns -1
592 */
593static int sharpsl_fatal_check(void)
594{
595 int buff[5], temp, i, acin;
596
597 dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
598
599 /* Check AC-Adapter */
600 acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
601
602 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
603 sharpsl_pm.machinfo->charge(0);
604 udelay(100);
605 sharpsl_pm.machinfo->discharge(1); /* enable discharge */
606 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
607 }
608
609 if (sharpsl_pm.machinfo->discharge1)
610 sharpsl_pm.machinfo->discharge1(1);
611
612 /* Check battery : check inserting battery ? */
613 for (i=0; i<5; i++) {
614 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
615 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
616 }
617
618 if (sharpsl_pm.machinfo->discharge1)
619 sharpsl_pm.machinfo->discharge1(0);
620
621 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
622 udelay(100);
623 sharpsl_pm.machinfo->charge(1);
624 sharpsl_pm.machinfo->discharge(0);
625 }
626
627 temp = get_select_val(buff);
aceb6f0b 628 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));
b7557de4 629
f8703dc8
RP		 630 if ((acin && (temp < sharpsl_pm.machinfo->fatal_acin_volt)) ||
631 (!acin && (temp < sharpsl_pm.machinfo->fatal_noacin_volt)))
b7557de4
RP		 632 return -1;
633 return 0;
634}
635
636static int sharpsl_off_charge_error(void)
637{
6cbdc8c5 638 dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
b7557de4
RP		 639 sharpsl_pm.machinfo->charge(0);
640 sharpsl_pm_led(SHARPSL_LED_ERROR);
641 sharpsl_pm.charge_mode = CHRG_ERROR;
642 return 1;
643}
644
645/*
646 * Charging Control while suspended
647 * Return 1 - go straight to sleep
648 * Return 0 - sleep or wakeup depending on other factors
649 */
650static int sharpsl_off_charge_battery(void)
651{
652 int time;
653
654 dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
655
656 if (sharpsl_pm.charge_mode == CHRG_OFF) {
657 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
658
659 /* AC Check */
660 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
661 return sharpsl_off_charge_error();
662
663 /* Start Charging */
664 sharpsl_pm_led(SHARPSL_LED_ON);
665 sharpsl_pm.machinfo->charge(0);
666 mdelay(SHARPSL_CHARGE_WAIT_TIME);
667 sharpsl_pm.machinfo->charge(1);
668
669 sharpsl_pm.charge_mode = CHRG_ON;
670 sharpsl_pm.full_count = 0;
671
672 return 1;
673 } else if (sharpsl_pm.charge_mode != CHRG_ON) {
674 return 1;
675 }
676
677 if (sharpsl_pm.full_count == 0) {
678 int time;
679
680 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
681
682 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
683 return sharpsl_off_charge_error();
684
685 sharpsl_pm.machinfo->charge(0);
686 mdelay(SHARPSL_CHARGE_WAIT_TIME);
687 sharpsl_pm.machinfo->charge(1);
688 sharpsl_pm.charge_mode = CHRG_ON;
689
690 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
691
692 time = RCNR;
693 while(1) {
6cbdc8c5 694 /* Check if any wakeup event had occurred */
b7557de4
RP		 695 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
696 return 0;
697 /* Check for timeout */
698 if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
699 return 1;
700 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
6cbdc8c5 701 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
b7557de4
RP		 702 sharpsl_pm.full_count++;
703 sharpsl_pm.machinfo->charge(0);
704 mdelay(SHARPSL_CHARGE_WAIT_TIME);
705 sharpsl_pm.machinfo->charge(1);
706 return 1;
707 }
708 }
709 }
710
711 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
712
713 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
714
715 time = RCNR;
716 while(1) {
6cbdc8c5 717 /* Check if any wakeup event had occurred */
b7557de4
RP		 718 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
719 return 0;
720 /* Check for timeout */
721 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
722 if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
723 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
724 sharpsl_pm.full_count = 0;
725 }
726 sharpsl_pm.full_count++;
727 return 1;
728 }
729 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
730 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
731 sharpsl_pm_led(SHARPSL_LED_OFF);
732 sharpsl_pm.machinfo->charge(0);
733 sharpsl_pm.charge_mode = CHRG_DONE;
734 return 1;
735 }
736 }
737}
738
739
740static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
741{
742 return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_percent);
743}
744
745static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
746{
747 return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_voltage);
748}
749
750static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
751static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
752
753extern void (*apm_get_power_status)(struct apm_power_info *);
754
755static void sharpsl_apm_get_power_status(struct apm_power_info *info)
756{
757 info->ac_line_status = sharpsl_pm.battstat.ac_status;
758
759 if (sharpsl_pm.charge_mode == CHRG_ON)
760 info->battery_status = APM_BATTERY_STATUS_CHARGING;
761 else
762 info->battery_status = sharpsl_pm.battstat.mainbat_status;
763
764 info->battery_flag = (1 << info->battery_status);
765 info->battery_life = sharpsl_pm.battstat.mainbat_percent;
766}
767
768static struct pm_ops sharpsl_pm_ops = {
b7557de4 769 .enter = corgi_pxa_pm_enter,
e8c9c502 770 .valid = pm_valid_only_mem,
b7557de4
RP		 771};
772
773static int __init sharpsl_pm_probe(struct platform_device *pdev)
774{
aceb6f0b
RP		 775 int ret;
776
b7557de4
RP		 777 if (!pdev->dev.platform_data)
778 return -EINVAL;
779
780 sharpsl_pm.dev = &pdev->dev;
781 sharpsl_pm.machinfo = pdev->dev.platform_data;
782 sharpsl_pm.charge_mode = CHRG_OFF;
783 sharpsl_pm.flags = 0;
784
785 init_timer(&sharpsl_pm.ac_timer);
786 sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
787
788 init_timer(&sharpsl_pm.chrg_full_timer);
789 sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
790
181bf8aa
RP		 791 led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
792
b7557de4
RP		 793 sharpsl_pm.machinfo->init();
794
aceb6f0b
RP		 795 ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
796 ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
797 if (ret != 0)
798 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
b7557de4
RP		 799
800 apm_get_power_status = sharpsl_apm_get_power_status;
801
802 pm_set_ops(&sharpsl_pm_ops);
803
804 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
805
806 return 0;
807}
808
809static int sharpsl_pm_remove(struct platform_device *pdev)
810{
811 pm_set_ops(NULL);
812
813 device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
814 device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
815
181bf8aa
RP		 816 led_trigger_unregister_simple(sharpsl_charge_led_trigger);
817
b7557de4
RP		 818 sharpsl_pm.machinfo->exit();
819
820 del_timer_sync(&sharpsl_pm.chrg_full_timer);
821 del_timer_sync(&sharpsl_pm.ac_timer);
822
823 return 0;
824}
825
826static struct platform_driver sharpsl_pm_driver = {
827 .probe = sharpsl_pm_probe,
828 .remove = sharpsl_pm_remove,
829 .suspend = sharpsl_pm_suspend,
830 .resume = sharpsl_pm_resume,
831 .driver = {
832 .name = "sharpsl-pm",
833 },
834};
835
836static int __devinit sharpsl_pm_init(void)
837{
838 return platform_driver_register(&sharpsl_pm_driver);
839}
840
841static void sharpsl_pm_exit(void)
842{
843 platform_driver_unregister(&sharpsl_pm_driver);
844}
845
846late_initcall(sharpsl_pm_init);
847module_exit(sharpsl_pm_exit);
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