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-rw-r--r--arch/arm/common/sharpsl_pm.c839
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diff --git a/arch/arm/common/sharpsl_pm.c b/arch/arm/common/sharpsl_pm.c
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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
26#include <asm/hardware.h>
27#include <asm/mach-types.h>
28#include <asm/irq.h>
29#include <asm/apm.h>
30#include <asm/arch/pm.h>
31#include <asm/arch/pxa-regs.h>
32#include <asm/arch/sharpsl.h>
33#include <asm/hardware/sharpsl_pm.h>
34
35/*
36 * Constants
37 */
38#define SHARPSL_CHARGE_ON_TIME_INTERVAL (msecs_to_jiffies(1*60*1000)) /* 1 min */
39#define SHARPSL_CHARGE_FINISH_TIME (msecs_to_jiffies(10*60*1000)) /* 10 min */
40#define SHARPSL_BATCHK_TIME (msecs_to_jiffies(15*1000)) /* 15 sec */
41#define SHARPSL_BATCHK_TIME_SUSPEND (60*10) /* 10 min */
42#define SHARPSL_WAIT_CO_TIME 15 /* 15 sec */
43#define SHARPSL_WAIT_DISCHARGE_ON 100 /* 100 msec */
44#define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP 10 /* 10 msec */
45#define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT 10 /* 10 msec */
46#define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN 10 /* 10 msec */
47#define SHARPSL_CHARGE_WAIT_TIME 15 /* 15 msec */
48#define SHARPSL_CHARGE_CO_CHECK_TIME 5 /* 5 msec */
49#define SHARPSL_CHARGE_RETRY_CNT 1 /* eqv. 10 min */
50
51#define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */
52#define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */
53#define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */
54#define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */
55#define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */
56#define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */
57
58/*
59 * Prototypes
60 */
61static int sharpsl_off_charge_battery(void);
62static int sharpsl_check_battery_temp(void);
63static int sharpsl_check_battery_voltage(void);
64static int sharpsl_ac_check(void);
65static int sharpsl_fatal_check(void);
66static int sharpsl_average_value(int ad);
67static void sharpsl_average_clear(void);
68static void sharpsl_charge_toggle(void *private_);
69static void sharpsl_battery_thread(void *private_);
70
71
72/*
73 * Variables
74 */
75struct sharpsl_pm_status sharpsl_pm;
76DECLARE_WORK(toggle_charger, sharpsl_charge_toggle, NULL);
77DECLARE_WORK(sharpsl_bat, sharpsl_battery_thread, NULL);
78
79
80static int get_percentage(int voltage)
81{
82 int i = sharpsl_pm.machinfo->bat_levels - 1;
83 struct battery_thresh *thresh;
84
85 if (sharpsl_pm.charge_mode == CHRG_ON)
86 thresh=sharpsl_pm.machinfo->bat_levels_acin;
87 else
88 thresh=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
96static 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
115void sharpsl_battery_kick(void)
116{
117 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
118}
119EXPORT_SYMBOL(sharpsl_battery_kick);
120
121
122static void sharpsl_battery_thread(void *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 (machine_is_corgi() && (sharpsl_pm.charge_mode == CHRG_ON)
133 && time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_ON_TIME_INTERVAL))
134 schedule_work(&toggle_charger);
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: %d\n", voltage,
160 sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
161
162 /* If battery is low. limit backlight intensity to save power. */
163 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
164 && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW) ||
165 (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
166 if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
167 corgibl_limit_intensity(1);
168 sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
169 }
170 } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
171 corgibl_limit_intensity(0);
172 sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
173 }
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
187void 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
194 } else {
195 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
196
197 }
198}
199
200static 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
210static 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_work(&sharpsl_bat);
219}
220
221static 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
228static void sharpsl_charge_toggle(void *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
248static 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_work(&sharpsl_bat);
261}
262
263
264irqreturn_t sharpsl_ac_isr(int irq, void *dev_id, struct pt_regs *fp)
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
273static 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_work(&toggle_charger);
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_work(&toggle_charger);
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 staus change so
298 delay until after that has been processed */
299irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id, struct pt_regs *fp)
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
310irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id, struct pt_regs *fp)
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
336static int sharpsl_ad_index;
337
338static void sharpsl_average_clear(void)
339{
340 sharpsl_ad_index = 0;
341}
342
343static 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 */
370static 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
403static 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_CHARGE_ON_TEMP)
420 return -1;
421
422 return 0;
423}
424
425static 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_CHARGE_ON_VOLT)
452 return -1;
453
454 return 0;
455}
456
457static 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_CHARGE_ON_ACIN_HIGH) || (temp < SHARPSL_CHARGE_ON_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
478static 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
491static 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
502static 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
541static 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
568static 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 dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
581
582 return 0;
583}
584#endif
585
586
587/*
588 * Check for fatal battery errors
589 * Fatal returns -1
590 */
591static int sharpsl_fatal_check(void)
592{
593 int buff[5], temp, i, acin;
594
595 dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
596
597 /* Check AC-Adapter */
598 acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
599
600 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
601 sharpsl_pm.machinfo->charge(0);
602 udelay(100);
603 sharpsl_pm.machinfo->discharge(1); /* enable discharge */
604 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
605 }
606
607 if (sharpsl_pm.machinfo->discharge1)
608 sharpsl_pm.machinfo->discharge1(1);
609
610 /* Check battery : check inserting battery ? */
611 for (i=0; i<5; i++) {
612 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
613 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
614 }
615
616 if (sharpsl_pm.machinfo->discharge1)
617 sharpsl_pm.machinfo->discharge1(0);
618
619 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
620 udelay(100);
621 sharpsl_pm.machinfo->charge(1);
622 sharpsl_pm.machinfo->discharge(0);
623 }
624
625 temp = get_select_val(buff);
626 dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check: acin: %d, discharge voltage: %d, no discharge: %d\n", acin, temp, sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT));
627
628 if ((acin && (temp < SHARPSL_FATAL_ACIN_VOLT)) ||
629 (!acin && (temp < SHARPSL_FATAL_NOACIN_VOLT)))
630 return -1;
631 return 0;
632}
633
634static int sharpsl_off_charge_error(void)
635{
636 dev_err(sharpsl_pm.dev, "Offline Charger: Error occured.\n");
637 sharpsl_pm.machinfo->charge(0);
638 sharpsl_pm_led(SHARPSL_LED_ERROR);
639 sharpsl_pm.charge_mode = CHRG_ERROR;
640 return 1;
641}
642
643/*
644 * Charging Control while suspended
645 * Return 1 - go straight to sleep
646 * Return 0 - sleep or wakeup depending on other factors
647 */
648static int sharpsl_off_charge_battery(void)
649{
650 int time;
651
652 dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
653
654 if (sharpsl_pm.charge_mode == CHRG_OFF) {
655 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
656
657 /* AC Check */
658 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
659 return sharpsl_off_charge_error();
660
661 /* Start Charging */
662 sharpsl_pm_led(SHARPSL_LED_ON);
663 sharpsl_pm.machinfo->charge(0);
664 mdelay(SHARPSL_CHARGE_WAIT_TIME);
665 sharpsl_pm.machinfo->charge(1);
666
667 sharpsl_pm.charge_mode = CHRG_ON;
668 sharpsl_pm.full_count = 0;
669
670 return 1;
671 } else if (sharpsl_pm.charge_mode != CHRG_ON) {
672 return 1;
673 }
674
675 if (sharpsl_pm.full_count == 0) {
676 int time;
677
678 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
679
680 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
681 return sharpsl_off_charge_error();
682
683 sharpsl_pm.machinfo->charge(0);
684 mdelay(SHARPSL_CHARGE_WAIT_TIME);
685 sharpsl_pm.machinfo->charge(1);
686 sharpsl_pm.charge_mode = CHRG_ON;
687
688 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
689
690 time = RCNR;
691 while(1) {
692 /* Check if any wakeup event had occured */
693 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
694 return 0;
695 /* Check for timeout */
696 if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
697 return 1;
698 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
699 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occured. Retrying to check\n");
700 sharpsl_pm.full_count++;
701 sharpsl_pm.machinfo->charge(0);
702 mdelay(SHARPSL_CHARGE_WAIT_TIME);
703 sharpsl_pm.machinfo->charge(1);
704 return 1;
705 }
706 }
707 }
708
709 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
710
711 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
712
713 time = RCNR;
714 while(1) {
715 /* Check if any wakeup event had occured */
716 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
717 return 0;
718 /* Check for timeout */
719 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
720 if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
721 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
722 sharpsl_pm.full_count = 0;
723 }
724 sharpsl_pm.full_count++;
725 return 1;
726 }
727 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
728 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
729 sharpsl_pm_led(SHARPSL_LED_OFF);
730 sharpsl_pm.machinfo->charge(0);
731 sharpsl_pm.charge_mode = CHRG_DONE;
732 return 1;
733 }
734 }
735}
736
737
738static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
739{
740 return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_percent);
741}
742
743static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
744{
745 return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_voltage);
746}
747
748static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
749static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
750
751extern void (*apm_get_power_status)(struct apm_power_info *);
752
753static void sharpsl_apm_get_power_status(struct apm_power_info *info)
754{
755 info->ac_line_status = sharpsl_pm.battstat.ac_status;
756
757 if (sharpsl_pm.charge_mode == CHRG_ON)
758 info->battery_status = APM_BATTERY_STATUS_CHARGING;
759 else
760 info->battery_status = sharpsl_pm.battstat.mainbat_status;
761
762 info->battery_flag = (1 << info->battery_status);
763 info->battery_life = sharpsl_pm.battstat.mainbat_percent;
764}
765
766static struct pm_ops sharpsl_pm_ops = {
767 .pm_disk_mode = PM_DISK_FIRMWARE,
768 .prepare = pxa_pm_prepare,
769 .enter = corgi_pxa_pm_enter,
770 .finish = pxa_pm_finish,
771};
772
773static int __init sharpsl_pm_probe(struct platform_device *pdev)
774{
775 if (!pdev->dev.platform_data)
776 return -EINVAL;
777
778 sharpsl_pm.dev = &pdev->dev;
779 sharpsl_pm.machinfo = pdev->dev.platform_data;
780 sharpsl_pm.charge_mode = CHRG_OFF;
781 sharpsl_pm.flags = 0;
782
783 init_timer(&sharpsl_pm.ac_timer);
784 sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
785
786 init_timer(&sharpsl_pm.chrg_full_timer);
787 sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
788
789 sharpsl_pm.machinfo->init();
790
791 device_create_file(&pdev->dev, &dev_attr_battery_percentage);
792 device_create_file(&pdev->dev, &dev_attr_battery_voltage);
793
794 apm_get_power_status = sharpsl_apm_get_power_status;
795
796 pm_set_ops(&sharpsl_pm_ops);
797
798 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
799
800 return 0;
801}
802
803static int sharpsl_pm_remove(struct platform_device *pdev)
804{
805 pm_set_ops(NULL);
806
807 device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
808 device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
809
810 sharpsl_pm.machinfo->exit();
811
812 del_timer_sync(&sharpsl_pm.chrg_full_timer);
813 del_timer_sync(&sharpsl_pm.ac_timer);
814
815 return 0;
816}
817
818static struct platform_driver sharpsl_pm_driver = {
819 .probe = sharpsl_pm_probe,
820 .remove = sharpsl_pm_remove,
821 .suspend = sharpsl_pm_suspend,
822 .resume = sharpsl_pm_resume,
823 .driver = {
824 .name = "sharpsl-pm",
825 },
826};
827
828static int __devinit sharpsl_pm_init(void)
829{
830 return platform_driver_register(&sharpsl_pm_driver);
831}
832
833static void sharpsl_pm_exit(void)
834{
835 platform_driver_unregister(&sharpsl_pm_driver);
836}
837
838late_initcall(sharpsl_pm_init);
839module_exit(sharpsl_pm_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-18 03:58:55 -0500