2 * Battery and Power Management code for the Sharp SL-C7xx and SL-Cxx00
5 * Copyright (c) 2004-2005 Richard Purdie
7 * Based on code written by Sharp for 2.4 kernels
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.
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/interrupt.h>
20 #include <linux/platform_device.h>
21 #include <linux/apm-emulation.h>
22 #include <linux/timer.h>
23 #include <linux/delay.h>
24 #include <linux/leds.h>
25 #include <linux/suspend.h>
26 #include <linux/gpio.h>
28 #include <asm/mach-types.h>
30 #include <mach/pxa2xx-regs.h>
31 #include <mach/regs-rtc.h>
32 #include <mach/sharpsl.h>
33 #include <mach/sharpsl_pm.h>
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 */
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 */
58 static int sharpsl_off_charge_battery(void);
59 static int sharpsl_check_battery_voltage(void);
60 static int sharpsl_fatal_check(void);
62 static int sharpsl_check_battery_temp(void);
63 static int sharpsl_ac_check(void);
64 static int sharpsl_average_value(int ad);
65 static void sharpsl_average_clear(void);
66 static void sharpsl_charge_toggle(struct work_struct *private_);
67 static void sharpsl_battery_thread(struct work_struct *private_);
73 struct sharpsl_pm_status sharpsl_pm;
74 static DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
75 static DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
76 DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
80 struct battery_thresh sharpsl_battery_levels_acin[] = {
123 struct battery_thresh sharpsl_battery_levels_noac[] = {
166 /* MAX1111 Commands */
167 #define MAXCTRL_PD0 (1u << 0)
168 #define MAXCTRL_PD1 (1u << 1)
169 #define MAXCTRL_SGL (1u << 2)
170 #define MAXCTRL_UNI (1u << 3)
171 #define MAXCTRL_SEL_SH 4
172 #define MAXCTRL_STR (1u << 7)
177 int sharpsl_pm_pxa_read_max1111(int channel)
179 /* Ugly, better move this function into another module */
180 if (machine_is_tosa())
183 #ifdef CONFIG_CORGI_SSP_DEPRECATED
184 return corgi_ssp_max1111_get((channel << MAXCTRL_SEL_SH) | MAXCTRL_PD0 | MAXCTRL_PD1
185 | MAXCTRL_SGL | MAXCTRL_UNI | MAXCTRL_STR);
187 extern int max1111_read_channel(int);
189 /* max1111 accepts channels from 0-3, however,
190 * it is encoded from 0-7 here in the code.
192 return max1111_read_channel(channel >> 1);
196 static int get_percentage(int voltage)
198 int i = sharpsl_pm.machinfo->bat_levels - 1;
199 int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
200 struct battery_thresh *thresh;
202 if (sharpsl_pm.charge_mode == CHRG_ON)
203 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
205 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
207 while (i > 0 && (voltage > thresh[i].voltage))
210 return thresh[i].percentage;
213 static int get_apm_status(int voltage)
215 int low_thresh, high_thresh;
217 if (sharpsl_pm.charge_mode == CHRG_ON) {
218 high_thresh = sharpsl_pm.machinfo->status_high_acin;
219 low_thresh = sharpsl_pm.machinfo->status_low_acin;
221 high_thresh = sharpsl_pm.machinfo->status_high_noac;
222 low_thresh = sharpsl_pm.machinfo->status_low_noac;
225 if (voltage >= high_thresh)
226 return APM_BATTERY_STATUS_HIGH;
227 if (voltage >= low_thresh)
228 return APM_BATTERY_STATUS_LOW;
229 return APM_BATTERY_STATUS_CRITICAL;
232 void sharpsl_battery_kick(void)
234 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
236 EXPORT_SYMBOL(sharpsl_battery_kick);
239 static void sharpsl_battery_thread(struct work_struct *private_)
241 int voltage, percent, apm_status, i;
243 if (!sharpsl_pm.machinfo)
246 sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
248 /* Corgi cannot confirm when battery fully charged so periodically kick! */
249 if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
250 && time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_ON_TIME_INTERVAL))
251 schedule_delayed_work(&toggle_charger, 0);
253 for (i = 0; i < 5; i++) {
254 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
259 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
260 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
263 voltage = sharpsl_average_value(voltage);
264 apm_status = get_apm_status(voltage);
265 percent = get_percentage(voltage);
267 /* At low battery voltages, the voltage has a tendency to start
268 creeping back up so we try to avoid this here */
269 if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE)
270 || (apm_status == APM_BATTERY_STATUS_HIGH)
271 || percent <= sharpsl_pm.battstat.mainbat_percent) {
272 sharpsl_pm.battstat.mainbat_voltage = voltage;
273 sharpsl_pm.battstat.mainbat_status = apm_status;
274 sharpsl_pm.battstat.mainbat_percent = percent;
277 dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
278 sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
280 #ifdef CONFIG_BACKLIGHT_CORGI
281 /* If battery is low. limit backlight intensity to save power. */
282 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
283 && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW)
284 || (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
285 if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
286 sharpsl_pm.machinfo->backlight_limit(1);
287 sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
289 } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
290 sharpsl_pm.machinfo->backlight_limit(0);
291 sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
295 /* Suspend if critical battery level */
296 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
297 && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
298 && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
299 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
300 dev_err(sharpsl_pm.dev, "Fatal Off\n");
301 apm_queue_event(APM_CRITICAL_SUSPEND);
304 schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
307 void sharpsl_pm_led(int val)
309 if (val == SHARPSL_LED_ERROR) {
310 dev_err(sharpsl_pm.dev, "Charging Error!\n");
311 } else if (val == SHARPSL_LED_ON) {
312 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
313 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
315 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
316 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
320 static void sharpsl_charge_on(void)
322 dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
324 sharpsl_pm.full_count = 0;
325 sharpsl_pm.charge_mode = CHRG_ON;
326 schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
327 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
330 static void sharpsl_charge_off(void)
332 dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
334 sharpsl_pm.machinfo->charge(0);
335 sharpsl_pm_led(SHARPSL_LED_OFF);
336 sharpsl_pm.charge_mode = CHRG_OFF;
338 schedule_delayed_work(&sharpsl_bat, 0);
341 static void sharpsl_charge_error(void)
343 sharpsl_pm_led(SHARPSL_LED_ERROR);
344 sharpsl_pm.machinfo->charge(0);
345 sharpsl_pm.charge_mode = CHRG_ERROR;
348 static void sharpsl_charge_toggle(struct work_struct *private_)
350 dev_dbg(sharpsl_pm.dev, "Toggling Charger at time: %lx\n", jiffies);
352 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
353 sharpsl_charge_off();
355 } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
356 sharpsl_charge_error();
360 sharpsl_pm_led(SHARPSL_LED_ON);
361 sharpsl_pm.machinfo->charge(0);
362 mdelay(SHARPSL_CHARGE_WAIT_TIME);
363 sharpsl_pm.machinfo->charge(1);
365 sharpsl_pm.charge_start_time = jiffies;
368 static void sharpsl_ac_timer(unsigned long data)
370 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
372 dev_dbg(sharpsl_pm.dev, "AC Status: %d\n", acin);
374 sharpsl_average_clear();
375 if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
377 else if (sharpsl_pm.charge_mode == CHRG_ON)
378 sharpsl_charge_off();
380 schedule_delayed_work(&sharpsl_bat, 0);
384 static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
386 /* Delay the event slightly to debounce */
387 /* Must be a smaller delay than the chrg_full_isr below */
388 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
393 static void sharpsl_chrg_full_timer(unsigned long data)
395 dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
397 sharpsl_pm.full_count++;
399 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
400 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
401 if (sharpsl_pm.charge_mode == CHRG_ON)
402 sharpsl_charge_off();
403 } else if (sharpsl_pm.full_count < 2) {
404 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
405 schedule_delayed_work(&toggle_charger, 0);
406 } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
407 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
408 schedule_delayed_work(&toggle_charger, 0);
410 sharpsl_charge_off();
411 sharpsl_pm.charge_mode = CHRG_DONE;
412 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
416 /* Charging Finished Interrupt (Not present on Corgi) */
417 /* Can trigger at the same time as an AC status change so
418 delay until after that has been processed */
419 static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
421 if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
424 /* delay until after any ac interrupt */
425 mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
430 static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
434 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
435 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
439 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
440 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
444 if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
445 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
446 apm_queue_event(APM_CRITICAL_SUSPEND);
453 * Maintain an average of the last 10 readings
455 #define SHARPSL_CNV_VALUE_NUM 10
456 static int sharpsl_ad_index;
458 static void sharpsl_average_clear(void)
460 sharpsl_ad_index = 0;
463 static int sharpsl_average_value(int ad)
466 static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
468 if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
469 sharpsl_ad_index = 0;
473 sharpsl_ad[sharpsl_ad_index] = ad;
475 if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
476 for (i = 0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
477 sharpsl_ad[i] = sharpsl_ad[i+1];
478 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
480 for (i = 0; i < sharpsl_ad_index; i++)
481 ad_val += sharpsl_ad[i];
483 return ad_val / sharpsl_ad_index;
487 * Take an array of 5 integers, remove the maximum and minimum values
488 * and return the average.
490 static int get_select_val(int *val)
492 int i, j, k, temp, sum = 0;
497 for (i = 1; i < 5; i++) {
507 for (i = 3; i >= 0; i--) {
514 for (i = 0; i < 5; i++)
515 if (i != j && i != k)
518 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]);
523 static int sharpsl_check_battery_temp(void)
527 /* Check battery temperature */
528 for (i = 0; i < 5; i++) {
529 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
530 sharpsl_pm.machinfo->measure_temp(1);
531 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
532 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
533 sharpsl_pm.machinfo->measure_temp(0);
536 val = get_select_val(buff);
538 dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
539 if (val > sharpsl_pm.machinfo->charge_on_temp) {
540 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
548 static int sharpsl_check_battery_voltage(void)
552 /* disable charge, enable discharge */
553 sharpsl_pm.machinfo->charge(0);
554 sharpsl_pm.machinfo->discharge(1);
555 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
557 if (sharpsl_pm.machinfo->discharge1)
558 sharpsl_pm.machinfo->discharge1(1);
560 /* Check battery voltage */
561 for (i = 0; i < 5; i++) {
562 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
563 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
566 if (sharpsl_pm.machinfo->discharge1)
567 sharpsl_pm.machinfo->discharge1(0);
569 sharpsl_pm.machinfo->discharge(0);
571 val = get_select_val(buff);
572 dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
574 if (val < sharpsl_pm.machinfo->charge_on_volt)
581 static int sharpsl_ac_check(void)
583 int temp, i, buff[5];
585 for (i = 0; i < 5; i++) {
586 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
587 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
590 temp = get_select_val(buff);
591 dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n", temp);
593 if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
594 dev_err(sharpsl_pm.dev, "Error: AC check failed: voltage %d.\n", temp);
602 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
604 sharpsl_pm.flags |= SHARPSL_SUSPENDED;
605 flush_scheduled_work();
607 if (sharpsl_pm.charge_mode == CHRG_ON)
608 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
610 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
615 static int sharpsl_pm_resume(struct platform_device *pdev)
617 /* Clear the reset source indicators as they break the bootloader upon reboot */
619 sharpsl_average_clear();
620 sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
621 sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
626 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
628 dev_dbg(sharpsl_pm.dev, "Time is: %08x\n", RCNR);
630 dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n", sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
631 /* not charging and AC-IN! */
633 if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
634 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
635 sharpsl_pm.charge_mode = CHRG_OFF;
636 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
637 sharpsl_off_charge_battery();
640 sharpsl_pm.machinfo->presuspend();
642 PEDR = 0xffffffff; /* clear it */
644 sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
645 if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
647 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
648 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n", RTAR);
649 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
650 } else if (alarm_enable) {
653 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n", RTAR);
655 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
660 sharpsl_pm.machinfo->postsuspend();
662 dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n", PEDR);
665 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
667 if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable)) {
668 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
669 dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
670 corgi_goto_sleep(alarm_time, alarm_enable, state);
673 if (sharpsl_off_charge_battery()) {
674 dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
675 corgi_goto_sleep(alarm_time, alarm_enable, state);
678 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
681 if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) ||
682 (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL))) {
683 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
684 corgi_goto_sleep(alarm_time, alarm_enable, state);
691 static int corgi_pxa_pm_enter(suspend_state_t state)
693 unsigned long alarm_time = RTAR;
694 unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
696 dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
698 corgi_goto_sleep(alarm_time, alarm_status, state);
700 while (corgi_enter_suspend(alarm_time, alarm_status, state))
703 if (sharpsl_pm.machinfo->earlyresume)
704 sharpsl_pm.machinfo->earlyresume();
706 dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
712 * Check for fatal battery errors
715 static int sharpsl_fatal_check(void)
717 int buff[5], temp, i, acin;
719 dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
721 /* Check AC-Adapter */
722 acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
724 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
725 sharpsl_pm.machinfo->charge(0);
727 sharpsl_pm.machinfo->discharge(1); /* enable discharge */
728 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
731 if (sharpsl_pm.machinfo->discharge1)
732 sharpsl_pm.machinfo->discharge1(1);
734 /* Check battery : check inserting battery ? */
735 for (i = 0; i < 5; i++) {
736 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
737 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
740 if (sharpsl_pm.machinfo->discharge1)
741 sharpsl_pm.machinfo->discharge1(0);
743 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
745 sharpsl_pm.machinfo->charge(1);
746 sharpsl_pm.machinfo->discharge(0);
749 temp = get_select_val(buff);
750 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));
752 if ((acin && (temp < sharpsl_pm.machinfo->fatal_acin_volt)) ||
753 (!acin && (temp < sharpsl_pm.machinfo->fatal_noacin_volt)))
758 static int sharpsl_off_charge_error(void)
760 dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
761 sharpsl_pm.machinfo->charge(0);
762 sharpsl_pm_led(SHARPSL_LED_ERROR);
763 sharpsl_pm.charge_mode = CHRG_ERROR;
768 * Charging Control while suspended
769 * Return 1 - go straight to sleep
770 * Return 0 - sleep or wakeup depending on other factors
772 static int sharpsl_off_charge_battery(void)
776 dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
778 if (sharpsl_pm.charge_mode == CHRG_OFF) {
779 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
782 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
783 return sharpsl_off_charge_error();
786 sharpsl_pm_led(SHARPSL_LED_ON);
787 sharpsl_pm.machinfo->charge(0);
788 mdelay(SHARPSL_CHARGE_WAIT_TIME);
789 sharpsl_pm.machinfo->charge(1);
791 sharpsl_pm.charge_mode = CHRG_ON;
792 sharpsl_pm.full_count = 0;
795 } else if (sharpsl_pm.charge_mode != CHRG_ON) {
799 if (sharpsl_pm.full_count == 0) {
802 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
804 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
805 return sharpsl_off_charge_error();
807 sharpsl_pm.machinfo->charge(0);
808 mdelay(SHARPSL_CHARGE_WAIT_TIME);
809 sharpsl_pm.machinfo->charge(1);
810 sharpsl_pm.charge_mode = CHRG_ON;
812 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
816 /* Check if any wakeup event had occurred */
817 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
819 /* Check for timeout */
820 if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
822 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
823 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
824 sharpsl_pm.full_count++;
825 sharpsl_pm.machinfo->charge(0);
826 mdelay(SHARPSL_CHARGE_WAIT_TIME);
827 sharpsl_pm.machinfo->charge(1);
833 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
835 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
839 /* Check if any wakeup event had occurred */
840 if (sharpsl_pm.machinfo->charger_wakeup())
842 /* Check for timeout */
843 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
844 if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
845 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
846 sharpsl_pm.full_count = 0;
848 sharpsl_pm.full_count++;
851 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
852 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
853 sharpsl_pm_led(SHARPSL_LED_OFF);
854 sharpsl_pm.machinfo->charge(0);
855 sharpsl_pm.charge_mode = CHRG_DONE;
861 #define sharpsl_pm_suspend NULL
862 #define sharpsl_pm_resume NULL
865 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
867 return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_percent);
870 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
872 return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_voltage);
875 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
876 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
878 extern void (*apm_get_power_status)(struct apm_power_info *);
880 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
882 info->ac_line_status = sharpsl_pm.battstat.ac_status;
884 if (sharpsl_pm.charge_mode == CHRG_ON)
885 info->battery_status = APM_BATTERY_STATUS_CHARGING;
887 info->battery_status = sharpsl_pm.battstat.mainbat_status;
889 info->battery_flag = (1 << info->battery_status);
890 info->battery_life = sharpsl_pm.battstat.mainbat_percent;
894 static struct platform_suspend_ops sharpsl_pm_ops = {
895 .prepare = pxa_pm_prepare,
896 .finish = pxa_pm_finish,
897 .enter = corgi_pxa_pm_enter,
898 .valid = suspend_valid_only_mem,
902 static int __devinit sharpsl_pm_probe(struct platform_device *pdev)
906 if (!pdev->dev.platform_data)
909 sharpsl_pm.dev = &pdev->dev;
910 sharpsl_pm.machinfo = pdev->dev.platform_data;
911 sharpsl_pm.charge_mode = CHRG_OFF;
912 sharpsl_pm.flags = 0;
914 init_timer(&sharpsl_pm.ac_timer);
915 sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
917 init_timer(&sharpsl_pm.chrg_full_timer);
918 sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
920 led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
922 sharpsl_pm.machinfo->init();
924 gpio_request(sharpsl_pm.machinfo->gpio_acin, "AC IN");
925 gpio_direction_input(sharpsl_pm.machinfo->gpio_acin);
926 gpio_request(sharpsl_pm.machinfo->gpio_batfull, "Battery Full");
927 gpio_direction_input(sharpsl_pm.machinfo->gpio_batfull);
928 gpio_request(sharpsl_pm.machinfo->gpio_batlock, "Battery Lock");
929 gpio_direction_input(sharpsl_pm.machinfo->gpio_batlock);
931 /* Register interrupt handlers */
932 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr, IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "AC Input Detect", sharpsl_ac_isr)) {
933 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin));
936 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) {
937 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock));
940 if (sharpsl_pm.machinfo->gpio_fatal) {
941 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) {
942 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal));
946 if (sharpsl_pm.machinfo->batfull_irq) {
947 /* Register interrupt handler. */
948 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr, IRQF_DISABLED | IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) {
949 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull));
953 ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
954 ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
956 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
958 apm_get_power_status = sharpsl_apm_get_power_status;
961 suspend_set_ops(&sharpsl_pm_ops);
964 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
969 static int sharpsl_pm_remove(struct platform_device *pdev)
971 suspend_set_ops(NULL);
973 device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
974 device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
976 led_trigger_unregister_simple(sharpsl_charge_led_trigger);
978 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
979 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
981 if (sharpsl_pm.machinfo->gpio_fatal)
982 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
984 if (sharpsl_pm.machinfo->batfull_irq)
985 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
987 gpio_free(sharpsl_pm.machinfo->gpio_batlock);
988 gpio_free(sharpsl_pm.machinfo->gpio_batfull);
989 gpio_free(sharpsl_pm.machinfo->gpio_acin);
991 if (sharpsl_pm.machinfo->exit)
992 sharpsl_pm.machinfo->exit();
994 del_timer_sync(&sharpsl_pm.chrg_full_timer);
995 del_timer_sync(&sharpsl_pm.ac_timer);
1000 static struct platform_driver sharpsl_pm_driver = {
1001 .probe = sharpsl_pm_probe,
1002 .remove = sharpsl_pm_remove,
1003 .suspend = sharpsl_pm_suspend,
1004 .resume = sharpsl_pm_resume,
1006 .name = "sharpsl-pm",
1010 static int __devinit sharpsl_pm_init(void)
1012 return platform_driver_register(&sharpsl_pm_driver);
1015 static void sharpsl_pm_exit(void)
1017 platform_driver_unregister(&sharpsl_pm_driver);
1020 late_initcall(sharpsl_pm_init);
1021 module_exit(sharpsl_pm_exit);