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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Battery and Power Management code for the Sharp SL-C7xx and SL-Cxx00
4 * series of PDAs
5 *
6 * Copyright (c) 2004-2005 Richard Purdie
7 *
8 * Based on code written by Sharp for 2.4 kernels
9 */
10
11#undef DEBUG
12
13#include <linux/module.h>
14#include <linux/kernel.h>
15#include <linux/interrupt.h>
16#include <linux/platform_device.h>
17#include <linux/apm-emulation.h>
18#include <linux/timer.h>
19#include <linux/delay.h>
20#include <linux/leds.h>
21#include <linux/suspend.h>
22#include <linux/gpio.h>
23#include <linux/io.h>
24
25#include <asm/mach-types.h>
26#include "pm.h"
27#include "pxa2xx-regs.h"
28#include "regs-rtc.h"
29#include "sharpsl_pm.h"
30
31/*
32 * Constants
33 */
34#define SHARPSL_CHARGE_ON_TIME_INTERVAL (msecs_to_jiffies(1*60*1000)) /* 1 min */
35#define SHARPSL_CHARGE_FINISH_TIME (msecs_to_jiffies(10*60*1000)) /* 10 min */
36#define SHARPSL_BATCHK_TIME (msecs_to_jiffies(15*1000)) /* 15 sec */
37#define SHARPSL_BATCHK_TIME_SUSPEND (60*10) /* 10 min */
38
39#define SHARPSL_WAIT_CO_TIME 15 /* 15 sec */
40#define SHARPSL_WAIT_DISCHARGE_ON 100 /* 100 msec */
41#define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP 10 /* 10 msec */
42#define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT 10 /* 10 msec */
43#define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN 10 /* 10 msec */
44#define SHARPSL_CHARGE_WAIT_TIME 15 /* 15 msec */
45#define SHARPSL_CHARGE_CO_CHECK_TIME 5 /* 5 msec */
46#define SHARPSL_CHARGE_RETRY_CNT 1 /* eqv. 10 min */
47
48/*
49 * Prototypes
50 */
51#ifdef CONFIG_PM
52static int sharpsl_off_charge_battery(void);
53static int sharpsl_check_battery_voltage(void);
54#endif
55static int sharpsl_check_battery_temp(void);
56static int sharpsl_ac_check(void);
57static int sharpsl_average_value(int ad);
58static void sharpsl_average_clear(void);
59static void sharpsl_charge_toggle(struct work_struct *private_);
60static void sharpsl_battery_thread(struct work_struct *private_);
61
62
63/*
64 * Variables
65 */
66struct sharpsl_pm_status sharpsl_pm;
67static DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
68static DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
69DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
70
71
72
73struct battery_thresh sharpsl_battery_levels_acin[] = {
74 { 213, 100},
75 { 212, 98},
76 { 211, 95},
77 { 210, 93},
78 { 209, 90},
79 { 208, 88},
80 { 207, 85},
81 { 206, 83},
82 { 205, 80},
83 { 204, 78},
84 { 203, 75},
85 { 202, 73},
86 { 201, 70},
87 { 200, 68},
88 { 199, 65},
89 { 198, 63},
90 { 197, 60},
91 { 196, 58},
92 { 195, 55},
93 { 194, 53},
94 { 193, 50},
95 { 192, 48},
96 { 192, 45},
97 { 191, 43},
98 { 191, 40},
99 { 190, 38},
100 { 190, 35},
101 { 189, 33},
102 { 188, 30},
103 { 187, 28},
104 { 186, 25},
105 { 185, 23},
106 { 184, 20},
107 { 183, 18},
108 { 182, 15},
109 { 181, 13},
110 { 180, 10},
111 { 179, 8},
112 { 178, 5},
113 { 0, 0},
114};
115
116struct battery_thresh sharpsl_battery_levels_noac[] = {
117 { 213, 100},
118 { 212, 98},
119 { 211, 95},
120 { 210, 93},
121 { 209, 90},
122 { 208, 88},
123 { 207, 85},
124 { 206, 83},
125 { 205, 80},
126 { 204, 78},
127 { 203, 75},
128 { 202, 73},
129 { 201, 70},
130 { 200, 68},
131 { 199, 65},
132 { 198, 63},
133 { 197, 60},
134 { 196, 58},
135 { 195, 55},
136 { 194, 53},
137 { 193, 50},
138 { 192, 48},
139 { 191, 45},
140 { 190, 43},
141 { 189, 40},
142 { 188, 38},
143 { 187, 35},
144 { 186, 33},
145 { 185, 30},
146 { 184, 28},
147 { 183, 25},
148 { 182, 23},
149 { 181, 20},
150 { 180, 18},
151 { 179, 15},
152 { 178, 13},
153 { 177, 10},
154 { 176, 8},
155 { 175, 5},
156 { 0, 0},
157};
158
159/* MAX1111 Commands */
160#define MAXCTRL_PD0 (1u << 0)
161#define MAXCTRL_PD1 (1u << 1)
162#define MAXCTRL_SGL (1u << 2)
163#define MAXCTRL_UNI (1u << 3)
164#define MAXCTRL_SEL_SH 4
165#define MAXCTRL_STR (1u << 7)
166
167extern int max1111_read_channel(int);
168/*
169 * Read MAX1111 ADC
170 */
171int sharpsl_pm_pxa_read_max1111(int channel)
172{
173 /* max1111 accepts channels from 0-3, however,
174 * it is encoded from 0-7 here in the code.
175 */
176 return max1111_read_channel(channel >> 1);
177}
178
179static int get_percentage(int voltage)
180{
181 int i = sharpsl_pm.machinfo->bat_levels - 1;
182 int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
183 struct battery_thresh *thresh;
184
185 if (sharpsl_pm.charge_mode == CHRG_ON)
186 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
187 else
188 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
189
190 while (i > 0 && (voltage > thresh[i].voltage))
191 i--;
192
193 return thresh[i].percentage;
194}
195
196static int get_apm_status(int voltage)
197{
198 int low_thresh, high_thresh;
199
200 if (sharpsl_pm.charge_mode == CHRG_ON) {
201 high_thresh = sharpsl_pm.machinfo->status_high_acin;
202 low_thresh = sharpsl_pm.machinfo->status_low_acin;
203 } else {
204 high_thresh = sharpsl_pm.machinfo->status_high_noac;
205 low_thresh = sharpsl_pm.machinfo->status_low_noac;
206 }
207
208 if (voltage >= high_thresh)
209 return APM_BATTERY_STATUS_HIGH;
210 if (voltage >= low_thresh)
211 return APM_BATTERY_STATUS_LOW;
212 return APM_BATTERY_STATUS_CRITICAL;
213}
214
215void sharpsl_battery_kick(void)
216{
217 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
218}
219
220static void sharpsl_battery_thread(struct work_struct *private_)
221{
222 int voltage, percent, apm_status, i;
223
224 if (!sharpsl_pm.machinfo)
225 return;
226
227 sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
228
229 /* Corgi cannot confirm when battery fully charged so periodically kick! */
230 if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
231 && time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_ON_TIME_INTERVAL))
232 schedule_delayed_work(&toggle_charger, 0);
233
234 for (i = 0; i < 5; i++) {
235 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
236 if (voltage > 0)
237 break;
238 }
239 if (voltage <= 0) {
240 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
241 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
242 }
243
244 voltage = sharpsl_average_value(voltage);
245 apm_status = get_apm_status(voltage);
246 percent = get_percentage(voltage);
247
248 /* At low battery voltages, the voltage has a tendency to start
249 creeping back up so we try to avoid this here */
250 if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE)
251 || (apm_status == APM_BATTERY_STATUS_HIGH)
252 || percent <= sharpsl_pm.battstat.mainbat_percent) {
253 sharpsl_pm.battstat.mainbat_voltage = voltage;
254 sharpsl_pm.battstat.mainbat_status = apm_status;
255 sharpsl_pm.battstat.mainbat_percent = percent;
256 }
257
258 dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
259 sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
260
261 /* Suspend if critical battery level */
262 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
263 && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
264 && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
265 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
266 dev_err(sharpsl_pm.dev, "Fatal Off\n");
267 apm_queue_event(APM_CRITICAL_SUSPEND);
268 }
269
270 schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
271}
272
273void sharpsl_pm_led(int val)
274{
275 if (val == SHARPSL_LED_ERROR) {
276 dev_err(sharpsl_pm.dev, "Charging Error!\n");
277 } else if (val == SHARPSL_LED_ON) {
278 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
279 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
280 } else {
281 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
282 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
283 }
284}
285
286static void sharpsl_charge_on(void)
287{
288 dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
289
290 sharpsl_pm.full_count = 0;
291 sharpsl_pm.charge_mode = CHRG_ON;
292 schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
293 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
294}
295
296static void sharpsl_charge_off(void)
297{
298 dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
299
300 sharpsl_pm.machinfo->charge(0);
301 sharpsl_pm_led(SHARPSL_LED_OFF);
302 sharpsl_pm.charge_mode = CHRG_OFF;
303
304 schedule_delayed_work(&sharpsl_bat, 0);
305}
306
307static void sharpsl_charge_error(void)
308{
309 sharpsl_pm_led(SHARPSL_LED_ERROR);
310 sharpsl_pm.machinfo->charge(0);
311 sharpsl_pm.charge_mode = CHRG_ERROR;
312}
313
314static void sharpsl_charge_toggle(struct work_struct *private_)
315{
316 dev_dbg(sharpsl_pm.dev, "Toggling Charger at time: %lx\n", jiffies);
317
318 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
319 sharpsl_charge_off();
320 return;
321 } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
322 sharpsl_charge_error();
323 return;
324 }
325
326 sharpsl_pm_led(SHARPSL_LED_ON);
327 sharpsl_pm.machinfo->charge(0);
328 mdelay(SHARPSL_CHARGE_WAIT_TIME);
329 sharpsl_pm.machinfo->charge(1);
330
331 sharpsl_pm.charge_start_time = jiffies;
332}
333
334static void sharpsl_ac_timer(struct timer_list *unused)
335{
336 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
337
338 dev_dbg(sharpsl_pm.dev, "AC Status: %d\n", acin);
339
340 sharpsl_average_clear();
341 if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
342 sharpsl_charge_on();
343 else if (sharpsl_pm.charge_mode == CHRG_ON)
344 sharpsl_charge_off();
345
346 schedule_delayed_work(&sharpsl_bat, 0);
347}
348
349
350static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
351{
352 /* Delay the event slightly to debounce */
353 /* Must be a smaller delay than the chrg_full_isr below */
354 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
355
356 return IRQ_HANDLED;
357}
358
359static void sharpsl_chrg_full_timer(struct timer_list *unused)
360{
361 dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
362
363 sharpsl_pm.full_count++;
364
365 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
366 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
367 if (sharpsl_pm.charge_mode == CHRG_ON)
368 sharpsl_charge_off();
369 } else if (sharpsl_pm.full_count < 2) {
370 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
371 schedule_delayed_work(&toggle_charger, 0);
372 } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
373 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
374 schedule_delayed_work(&toggle_charger, 0);
375 } else {
376 sharpsl_charge_off();
377 sharpsl_pm.charge_mode = CHRG_DONE;
378 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
379 }
380}
381
382/* Charging Finished Interrupt (Not present on Corgi) */
383/* Can trigger at the same time as an AC status change so
384 delay until after that has been processed */
385static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
386{
387 if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
388 return IRQ_HANDLED;
389
390 /* delay until after any ac interrupt */
391 mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
392
393 return IRQ_HANDLED;
394}
395
396static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
397{
398 int is_fatal = 0;
399
400 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
401 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
402 is_fatal = 1;
403 }
404
405 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
406 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
407 is_fatal = 1;
408 }
409
410 if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
411 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
412 apm_queue_event(APM_CRITICAL_SUSPEND);
413 }
414
415 return IRQ_HANDLED;
416}
417
418/*
419 * Maintain an average of the last 10 readings
420 */
421#define SHARPSL_CNV_VALUE_NUM 10
422static int sharpsl_ad_index;
423
424static void sharpsl_average_clear(void)
425{
426 sharpsl_ad_index = 0;
427}
428
429static int sharpsl_average_value(int ad)
430{
431 int i, ad_val = 0;
432 static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
433
434 if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
435 sharpsl_ad_index = 0;
436 return ad;
437 }
438
439 sharpsl_ad[sharpsl_ad_index] = ad;
440 sharpsl_ad_index++;
441 if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
442 for (i = 0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
443 sharpsl_ad[i] = sharpsl_ad[i+1];
444 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
445 }
446 for (i = 0; i < sharpsl_ad_index; i++)
447 ad_val += sharpsl_ad[i];
448
449 return ad_val / sharpsl_ad_index;
450}
451
452/*
453 * Take an array of 5 integers, remove the maximum and minimum values
454 * and return the average.
455 */
456static int get_select_val(int *val)
457{
458 int i, j, k, temp, sum = 0;
459
460 /* Find MAX val */
461 temp = val[0];
462 j = 0;
463 for (i = 1; i < 5; i++) {
464 if (temp < val[i]) {
465 temp = val[i];
466 j = i;
467 }
468 }
469
470 /* Find MIN val */
471 temp = val[4];
472 k = 4;
473 for (i = 3; i >= 0; i--) {
474 if (temp > val[i]) {
475 temp = val[i];
476 k = i;
477 }
478 }
479
480 for (i = 0; i < 5; i++)
481 if (i != j && i != k)
482 sum += val[i];
483
484 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]);
485
486 return sum/3;
487}
488
489static int sharpsl_check_battery_temp(void)
490{
491 int val, i, buff[5];
492
493 /* Check battery temperature */
494 for (i = 0; i < 5; i++) {
495 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
496 sharpsl_pm.machinfo->measure_temp(1);
497 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
498 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
499 sharpsl_pm.machinfo->measure_temp(0);
500 }
501
502 val = get_select_val(buff);
503
504 dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
505 if (val > sharpsl_pm.machinfo->charge_on_temp) {
506 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
507 return -1;
508 }
509
510 return 0;
511}
512
513#ifdef CONFIG_PM
514static int sharpsl_check_battery_voltage(void)
515{
516 int val, i, buff[5];
517
518 /* disable charge, enable discharge */
519 sharpsl_pm.machinfo->charge(0);
520 sharpsl_pm.machinfo->discharge(1);
521 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
522
523 if (sharpsl_pm.machinfo->discharge1)
524 sharpsl_pm.machinfo->discharge1(1);
525
526 /* Check battery voltage */
527 for (i = 0; i < 5; i++) {
528 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
529 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
530 }
531
532 if (sharpsl_pm.machinfo->discharge1)
533 sharpsl_pm.machinfo->discharge1(0);
534
535 sharpsl_pm.machinfo->discharge(0);
536
537 val = get_select_val(buff);
538 dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
539
540 if (val < sharpsl_pm.machinfo->charge_on_volt)
541 return -1;
542
543 return 0;
544}
545#endif
546
547static int sharpsl_ac_check(void)
548{
549 int temp, i, buff[5];
550
551 for (i = 0; i < 5; i++) {
552 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
553 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
554 }
555
556 temp = get_select_val(buff);
557 dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n", temp);
558
559 if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
560 dev_err(sharpsl_pm.dev, "Error: AC check failed: voltage %d.\n", temp);
561 return -1;
562 }
563
564 return 0;
565}
566
567#ifdef CONFIG_PM
568static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
569{
570 sharpsl_pm.flags |= SHARPSL_SUSPENDED;
571 flush_delayed_work(&toggle_charger);
572 flush_delayed_work(&sharpsl_bat);
573
574 if (sharpsl_pm.charge_mode == CHRG_ON)
575 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
576 else
577 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
578
579 return 0;
580}
581
582static int sharpsl_pm_resume(struct platform_device *pdev)
583{
584 /* Clear the reset source indicators as they break the bootloader upon reboot */
585 RCSR = 0x0f;
586 sharpsl_average_clear();
587 sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
588 sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
589
590 return 0;
591}
592
593static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
594{
595 dev_dbg(sharpsl_pm.dev, "Time is: %08x\n", RCNR);
596
597 dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n", sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
598 /* not charging and AC-IN! */
599
600 if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
601 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
602 sharpsl_pm.charge_mode = CHRG_OFF;
603 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
604 sharpsl_off_charge_battery();
605 }
606
607 sharpsl_pm.machinfo->presuspend();
608
609 PEDR = 0xffffffff; /* clear it */
610
611 sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
612 if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
613 RTSR &= RTSR_ALE;
614 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
615 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n", RTAR);
616 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
617 } else if (alarm_enable) {
618 RTSR &= RTSR_ALE;
619 RTAR = alarm_time;
620 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n", RTAR);
621 } else {
622 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
623 }
624
625 pxa_pm_enter(state);
626
627 sharpsl_pm.machinfo->postsuspend();
628
629 dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n", PEDR);
630}
631
632static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
633{
634 if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable)) {
635 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
636 dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
637 corgi_goto_sleep(alarm_time, alarm_enable, state);
638 return 1;
639 }
640 if (sharpsl_off_charge_battery()) {
641 dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
642 corgi_goto_sleep(alarm_time, alarm_enable, state);
643 return 1;
644 }
645 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
646 }
647
648 if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) ||
649 (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL))) {
650 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
651 corgi_goto_sleep(alarm_time, alarm_enable, state);
652 return 1;
653 }
654
655 return 0;
656}
657
658static int corgi_pxa_pm_enter(suspend_state_t state)
659{
660 unsigned long alarm_time = RTAR;
661 unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
662
663 dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
664
665 corgi_goto_sleep(alarm_time, alarm_status, state);
666
667 while (corgi_enter_suspend(alarm_time, alarm_status, state))
668 {}
669
670 if (sharpsl_pm.machinfo->earlyresume)
671 sharpsl_pm.machinfo->earlyresume();
672
673 dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
674
675 return 0;
676}
677
678static int sharpsl_off_charge_error(void)
679{
680 dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
681 sharpsl_pm.machinfo->charge(0);
682 sharpsl_pm_led(SHARPSL_LED_ERROR);
683 sharpsl_pm.charge_mode = CHRG_ERROR;
684 return 1;
685}
686
687/*
688 * Charging Control while suspended
689 * Return 1 - go straight to sleep
690 * Return 0 - sleep or wakeup depending on other factors
691 */
692static int sharpsl_off_charge_battery(void)
693{
694 int time;
695
696 dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
697
698 if (sharpsl_pm.charge_mode == CHRG_OFF) {
699 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
700
701 /* AC Check */
702 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
703 return sharpsl_off_charge_error();
704
705 /* Start Charging */
706 sharpsl_pm_led(SHARPSL_LED_ON);
707 sharpsl_pm.machinfo->charge(0);
708 mdelay(SHARPSL_CHARGE_WAIT_TIME);
709 sharpsl_pm.machinfo->charge(1);
710
711 sharpsl_pm.charge_mode = CHRG_ON;
712 sharpsl_pm.full_count = 0;
713
714 return 1;
715 } else if (sharpsl_pm.charge_mode != CHRG_ON) {
716 return 1;
717 }
718
719 if (sharpsl_pm.full_count == 0) {
720 int time;
721
722 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
723
724 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
725 return sharpsl_off_charge_error();
726
727 sharpsl_pm.machinfo->charge(0);
728 mdelay(SHARPSL_CHARGE_WAIT_TIME);
729 sharpsl_pm.machinfo->charge(1);
730 sharpsl_pm.charge_mode = CHRG_ON;
731
732 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
733
734 time = RCNR;
735 while (1) {
736 /* Check if any wakeup event had occurred */
737 if (sharpsl_pm.machinfo->charger_wakeup())
738 return 0;
739 /* Check for timeout */
740 if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
741 return 1;
742 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
743 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
744 sharpsl_pm.full_count++;
745 sharpsl_pm.machinfo->charge(0);
746 mdelay(SHARPSL_CHARGE_WAIT_TIME);
747 sharpsl_pm.machinfo->charge(1);
748 return 1;
749 }
750 }
751 }
752
753 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
754
755 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
756
757 time = RCNR;
758 while (1) {
759 /* Check if any wakeup event had occurred */
760 if (sharpsl_pm.machinfo->charger_wakeup())
761 return 0;
762 /* Check for timeout */
763 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
764 if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
765 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
766 sharpsl_pm.full_count = 0;
767 }
768 sharpsl_pm.full_count++;
769 return 1;
770 }
771 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
772 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
773 sharpsl_pm_led(SHARPSL_LED_OFF);
774 sharpsl_pm.machinfo->charge(0);
775 sharpsl_pm.charge_mode = CHRG_DONE;
776 return 1;
777 }
778 }
779}
780#else
781#define sharpsl_pm_suspend NULL
782#define sharpsl_pm_resume NULL
783#endif
784
785static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
786{
787 return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_percent);
788}
789
790static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
791{
792 return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_voltage);
793}
794
795static DEVICE_ATTR_RO(battery_percentage);
796static DEVICE_ATTR_RO(battery_voltage);
797
798extern void (*apm_get_power_status)(struct apm_power_info *);
799
800static void sharpsl_apm_get_power_status(struct apm_power_info *info)
801{
802 info->ac_line_status = sharpsl_pm.battstat.ac_status;
803
804 if (sharpsl_pm.charge_mode == CHRG_ON)
805 info->battery_status = APM_BATTERY_STATUS_CHARGING;
806 else
807 info->battery_status = sharpsl_pm.battstat.mainbat_status;
808
809 info->battery_flag = (1 << info->battery_status);
810 info->battery_life = sharpsl_pm.battstat.mainbat_percent;
811}
812
813#ifdef CONFIG_PM
814static const struct platform_suspend_ops sharpsl_pm_ops = {
815 .prepare = pxa_pm_prepare,
816 .finish = pxa_pm_finish,
817 .enter = corgi_pxa_pm_enter,
818 .valid = suspend_valid_only_mem,
819};
820#endif
821
822static int sharpsl_pm_probe(struct platform_device *pdev)
823{
824 int ret, irq;
825
826 if (!pdev->dev.platform_data)
827 return -EINVAL;
828
829 sharpsl_pm.dev = &pdev->dev;
830 sharpsl_pm.machinfo = pdev->dev.platform_data;
831 sharpsl_pm.charge_mode = CHRG_OFF;
832 sharpsl_pm.flags = 0;
833
834 timer_setup(&sharpsl_pm.ac_timer, sharpsl_ac_timer, 0);
835
836 timer_setup(&sharpsl_pm.chrg_full_timer, sharpsl_chrg_full_timer, 0);
837
838 led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
839
840 sharpsl_pm.machinfo->init();
841
842 gpio_request(sharpsl_pm.machinfo->gpio_acin, "AC IN");
843 gpio_direction_input(sharpsl_pm.machinfo->gpio_acin);
844 gpio_request(sharpsl_pm.machinfo->gpio_batfull, "Battery Full");
845 gpio_direction_input(sharpsl_pm.machinfo->gpio_batfull);
846 gpio_request(sharpsl_pm.machinfo->gpio_batlock, "Battery Lock");
847 gpio_direction_input(sharpsl_pm.machinfo->gpio_batlock);
848
849 /* Register interrupt handlers */
850 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_acin);
851 if (request_irq(irq, sharpsl_ac_isr, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "AC Input Detect", sharpsl_ac_isr)) {
852 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
853 }
854
855 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock);
856 if (request_irq(irq, sharpsl_fatal_isr, IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) {
857 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
858 }
859
860 if (sharpsl_pm.machinfo->gpio_fatal) {
861 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal);
862 if (request_irq(irq, sharpsl_fatal_isr, IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) {
863 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
864 }
865 }
866
867 if (sharpsl_pm.machinfo->batfull_irq) {
868 /* Register interrupt handler. */
869 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull);
870 if (request_irq(irq, sharpsl_chrg_full_isr, IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) {
871 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
872 }
873 }
874
875 ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
876 ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
877 if (ret != 0)
878 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
879
880 apm_get_power_status = sharpsl_apm_get_power_status;
881
882#ifdef CONFIG_PM
883 suspend_set_ops(&sharpsl_pm_ops);
884#endif
885
886 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
887
888 return 0;
889}
890
891static void sharpsl_pm_remove(struct platform_device *pdev)
892{
893 suspend_set_ops(NULL);
894
895 device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
896 device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
897
898 led_trigger_unregister_simple(sharpsl_charge_led_trigger);
899
900 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
901 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
902
903 if (sharpsl_pm.machinfo->gpio_fatal)
904 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
905
906 if (sharpsl_pm.machinfo->batfull_irq)
907 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
908
909 gpio_free(sharpsl_pm.machinfo->gpio_batlock);
910 gpio_free(sharpsl_pm.machinfo->gpio_batfull);
911 gpio_free(sharpsl_pm.machinfo->gpio_acin);
912
913 if (sharpsl_pm.machinfo->exit)
914 sharpsl_pm.machinfo->exit();
915
916 del_timer_sync(&sharpsl_pm.chrg_full_timer);
917 del_timer_sync(&sharpsl_pm.ac_timer);
918}
919
920static struct platform_driver sharpsl_pm_driver = {
921 .probe = sharpsl_pm_probe,
922 .remove_new = sharpsl_pm_remove,
923 .suspend = sharpsl_pm_suspend,
924 .resume = sharpsl_pm_resume,
925 .driver = {
926 .name = "sharpsl-pm",
927 },
928};
929
930static int sharpsl_pm_init(void)
931{
932 return platform_driver_register(&sharpsl_pm_driver);
933}
934
935static void sharpsl_pm_exit(void)
936{
937 platform_driver_unregister(&sharpsl_pm_driver);
938}
939
940late_initcall(sharpsl_pm_init);
941module_exit(sharpsl_pm_exit);
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/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>
27#include <linux/io.h>
28
29#include <asm/mach-types.h>
30#include "pm.h"
31#include <mach/pxa2xx-regs.h>
32#include "regs-rtc.h"
33#include "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
43#define SHARPSL_WAIT_CO_TIME 15 /* 15 sec */
44#define SHARPSL_WAIT_DISCHARGE_ON 100 /* 100 msec */
45#define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP 10 /* 10 msec */
46#define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT 10 /* 10 msec */
47#define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN 10 /* 10 msec */
48#define SHARPSL_CHARGE_WAIT_TIME 15 /* 15 msec */
49#define SHARPSL_CHARGE_CO_CHECK_TIME 5 /* 5 msec */
50#define SHARPSL_CHARGE_RETRY_CNT 1 /* eqv. 10 min */
51
52/*
53 * Prototypes
54 */
55#ifdef CONFIG_PM
56static int sharpsl_off_charge_battery(void);
57static int sharpsl_check_battery_voltage(void);
58#endif
59static int sharpsl_check_battery_temp(void);
60static int sharpsl_ac_check(void);
61static int sharpsl_average_value(int ad);
62static void sharpsl_average_clear(void);
63static void sharpsl_charge_toggle(struct work_struct *private_);
64static void sharpsl_battery_thread(struct work_struct *private_);
65
66
67/*
68 * Variables
69 */
70struct sharpsl_pm_status sharpsl_pm;
71static DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
72static DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
73DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
74
75
76
77struct battery_thresh sharpsl_battery_levels_acin[] = {
78 { 213, 100},
79 { 212, 98},
80 { 211, 95},
81 { 210, 93},
82 { 209, 90},
83 { 208, 88},
84 { 207, 85},
85 { 206, 83},
86 { 205, 80},
87 { 204, 78},
88 { 203, 75},
89 { 202, 73},
90 { 201, 70},
91 { 200, 68},
92 { 199, 65},
93 { 198, 63},
94 { 197, 60},
95 { 196, 58},
96 { 195, 55},
97 { 194, 53},
98 { 193, 50},
99 { 192, 48},
100 { 192, 45},
101 { 191, 43},
102 { 191, 40},
103 { 190, 38},
104 { 190, 35},
105 { 189, 33},
106 { 188, 30},
107 { 187, 28},
108 { 186, 25},
109 { 185, 23},
110 { 184, 20},
111 { 183, 18},
112 { 182, 15},
113 { 181, 13},
114 { 180, 10},
115 { 179, 8},
116 { 178, 5},
117 { 0, 0},
118};
119
120struct battery_thresh sharpsl_battery_levels_noac[] = {
121 { 213, 100},
122 { 212, 98},
123 { 211, 95},
124 { 210, 93},
125 { 209, 90},
126 { 208, 88},
127 { 207, 85},
128 { 206, 83},
129 { 205, 80},
130 { 204, 78},
131 { 203, 75},
132 { 202, 73},
133 { 201, 70},
134 { 200, 68},
135 { 199, 65},
136 { 198, 63},
137 { 197, 60},
138 { 196, 58},
139 { 195, 55},
140 { 194, 53},
141 { 193, 50},
142 { 192, 48},
143 { 191, 45},
144 { 190, 43},
145 { 189, 40},
146 { 188, 38},
147 { 187, 35},
148 { 186, 33},
149 { 185, 30},
150 { 184, 28},
151 { 183, 25},
152 { 182, 23},
153 { 181, 20},
154 { 180, 18},
155 { 179, 15},
156 { 178, 13},
157 { 177, 10},
158 { 176, 8},
159 { 175, 5},
160 { 0, 0},
161};
162
163/* MAX1111 Commands */
164#define MAXCTRL_PD0 (1u << 0)
165#define MAXCTRL_PD1 (1u << 1)
166#define MAXCTRL_SGL (1u << 2)
167#define MAXCTRL_UNI (1u << 3)
168#define MAXCTRL_SEL_SH 4
169#define MAXCTRL_STR (1u << 7)
170
171extern int max1111_read_channel(int);
172/*
173 * Read MAX1111 ADC
174 */
175int sharpsl_pm_pxa_read_max1111(int channel)
176{
177 /* Ugly, better move this function into another module */
178 if (machine_is_tosa())
179 return 0;
180
181 /* max1111 accepts channels from 0-3, however,
182 * it is encoded from 0-7 here in the code.
183 */
184 return max1111_read_channel(channel >> 1);
185}
186
187static int get_percentage(int voltage)
188{
189 int i = sharpsl_pm.machinfo->bat_levels - 1;
190 int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
191 struct battery_thresh *thresh;
192
193 if (sharpsl_pm.charge_mode == CHRG_ON)
194 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
195 else
196 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
197
198 while (i > 0 && (voltage > thresh[i].voltage))
199 i--;
200
201 return thresh[i].percentage;
202}
203
204static int get_apm_status(int voltage)
205{
206 int low_thresh, high_thresh;
207
208 if (sharpsl_pm.charge_mode == CHRG_ON) {
209 high_thresh = sharpsl_pm.machinfo->status_high_acin;
210 low_thresh = sharpsl_pm.machinfo->status_low_acin;
211 } else {
212 high_thresh = sharpsl_pm.machinfo->status_high_noac;
213 low_thresh = sharpsl_pm.machinfo->status_low_noac;
214 }
215
216 if (voltage >= high_thresh)
217 return APM_BATTERY_STATUS_HIGH;
218 if (voltage >= low_thresh)
219 return APM_BATTERY_STATUS_LOW;
220 return APM_BATTERY_STATUS_CRITICAL;
221}
222
223void sharpsl_battery_kick(void)
224{
225 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
226}
227EXPORT_SYMBOL(sharpsl_battery_kick);
228
229
230static void sharpsl_battery_thread(struct work_struct *private_)
231{
232 int voltage, percent, apm_status, i;
233
234 if (!sharpsl_pm.machinfo)
235 return;
236
237 sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
238
239 /* Corgi cannot confirm when battery fully charged so periodically kick! */
240 if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
241 && time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_ON_TIME_INTERVAL))
242 schedule_delayed_work(&toggle_charger, 0);
243
244 for (i = 0; i < 5; i++) {
245 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
246 if (voltage > 0)
247 break;
248 }
249 if (voltage <= 0) {
250 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
251 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
252 }
253
254 voltage = sharpsl_average_value(voltage);
255 apm_status = get_apm_status(voltage);
256 percent = get_percentage(voltage);
257
258 /* At low battery voltages, the voltage has a tendency to start
259 creeping back up so we try to avoid this here */
260 if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE)
261 || (apm_status == APM_BATTERY_STATUS_HIGH)
262 || percent <= sharpsl_pm.battstat.mainbat_percent) {
263 sharpsl_pm.battstat.mainbat_voltage = voltage;
264 sharpsl_pm.battstat.mainbat_status = apm_status;
265 sharpsl_pm.battstat.mainbat_percent = percent;
266 }
267
268 dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
269 sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
270
271 /* Suspend if critical battery level */
272 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
273 && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
274 && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
275 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
276 dev_err(sharpsl_pm.dev, "Fatal Off\n");
277 apm_queue_event(APM_CRITICAL_SUSPEND);
278 }
279
280 schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
281}
282
283void sharpsl_pm_led(int val)
284{
285 if (val == SHARPSL_LED_ERROR) {
286 dev_err(sharpsl_pm.dev, "Charging Error!\n");
287 } else if (val == SHARPSL_LED_ON) {
288 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
289 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
290 } else {
291 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
292 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
293 }
294}
295
296static void sharpsl_charge_on(void)
297{
298 dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
299
300 sharpsl_pm.full_count = 0;
301 sharpsl_pm.charge_mode = CHRG_ON;
302 schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
303 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
304}
305
306static void sharpsl_charge_off(void)
307{
308 dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
309
310 sharpsl_pm.machinfo->charge(0);
311 sharpsl_pm_led(SHARPSL_LED_OFF);
312 sharpsl_pm.charge_mode = CHRG_OFF;
313
314 schedule_delayed_work(&sharpsl_bat, 0);
315}
316
317static void sharpsl_charge_error(void)
318{
319 sharpsl_pm_led(SHARPSL_LED_ERROR);
320 sharpsl_pm.machinfo->charge(0);
321 sharpsl_pm.charge_mode = CHRG_ERROR;
322}
323
324static void sharpsl_charge_toggle(struct work_struct *private_)
325{
326 dev_dbg(sharpsl_pm.dev, "Toggling Charger at time: %lx\n", jiffies);
327
328 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
329 sharpsl_charge_off();
330 return;
331 } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
332 sharpsl_charge_error();
333 return;
334 }
335
336 sharpsl_pm_led(SHARPSL_LED_ON);
337 sharpsl_pm.machinfo->charge(0);
338 mdelay(SHARPSL_CHARGE_WAIT_TIME);
339 sharpsl_pm.machinfo->charge(1);
340
341 sharpsl_pm.charge_start_time = jiffies;
342}
343
344static void sharpsl_ac_timer(struct timer_list *unused)
345{
346 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
347
348 dev_dbg(sharpsl_pm.dev, "AC Status: %d\n", acin);
349
350 sharpsl_average_clear();
351 if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
352 sharpsl_charge_on();
353 else if (sharpsl_pm.charge_mode == CHRG_ON)
354 sharpsl_charge_off();
355
356 schedule_delayed_work(&sharpsl_bat, 0);
357}
358
359
360static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
361{
362 /* Delay the event slightly to debounce */
363 /* Must be a smaller delay than the chrg_full_isr below */
364 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
365
366 return IRQ_HANDLED;
367}
368
369static void sharpsl_chrg_full_timer(struct timer_list *unused)
370{
371 dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
372
373 sharpsl_pm.full_count++;
374
375 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
376 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
377 if (sharpsl_pm.charge_mode == CHRG_ON)
378 sharpsl_charge_off();
379 } else if (sharpsl_pm.full_count < 2) {
380 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
381 schedule_delayed_work(&toggle_charger, 0);
382 } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
383 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
384 schedule_delayed_work(&toggle_charger, 0);
385 } else {
386 sharpsl_charge_off();
387 sharpsl_pm.charge_mode = CHRG_DONE;
388 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
389 }
390}
391
392/* Charging Finished Interrupt (Not present on Corgi) */
393/* Can trigger at the same time as an AC status change so
394 delay until after that has been processed */
395static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
396{
397 if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
398 return IRQ_HANDLED;
399
400 /* delay until after any ac interrupt */
401 mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
402
403 return IRQ_HANDLED;
404}
405
406static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
407{
408 int is_fatal = 0;
409
410 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
411 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
412 is_fatal = 1;
413 }
414
415 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
416 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
417 is_fatal = 1;
418 }
419
420 if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
421 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
422 apm_queue_event(APM_CRITICAL_SUSPEND);
423 }
424
425 return IRQ_HANDLED;
426}
427
428/*
429 * Maintain an average of the last 10 readings
430 */
431#define SHARPSL_CNV_VALUE_NUM 10
432static int sharpsl_ad_index;
433
434static void sharpsl_average_clear(void)
435{
436 sharpsl_ad_index = 0;
437}
438
439static int sharpsl_average_value(int ad)
440{
441 int i, ad_val = 0;
442 static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
443
444 if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
445 sharpsl_ad_index = 0;
446 return ad;
447 }
448
449 sharpsl_ad[sharpsl_ad_index] = ad;
450 sharpsl_ad_index++;
451 if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
452 for (i = 0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
453 sharpsl_ad[i] = sharpsl_ad[i+1];
454 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
455 }
456 for (i = 0; i < sharpsl_ad_index; i++)
457 ad_val += sharpsl_ad[i];
458
459 return ad_val / sharpsl_ad_index;
460}
461
462/*
463 * Take an array of 5 integers, remove the maximum and minimum values
464 * and return the average.
465 */
466static int get_select_val(int *val)
467{
468 int i, j, k, temp, sum = 0;
469
470 /* Find MAX val */
471 temp = val[0];
472 j = 0;
473 for (i = 1; i < 5; i++) {
474 if (temp < val[i]) {
475 temp = val[i];
476 j = i;
477 }
478 }
479
480 /* Find MIN val */
481 temp = val[4];
482 k = 4;
483 for (i = 3; i >= 0; i--) {
484 if (temp > val[i]) {
485 temp = val[i];
486 k = i;
487 }
488 }
489
490 for (i = 0; i < 5; i++)
491 if (i != j && i != k)
492 sum += val[i];
493
494 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]);
495
496 return sum/3;
497}
498
499static int sharpsl_check_battery_temp(void)
500{
501 int val, i, buff[5];
502
503 /* Check battery temperature */
504 for (i = 0; i < 5; i++) {
505 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
506 sharpsl_pm.machinfo->measure_temp(1);
507 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
508 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
509 sharpsl_pm.machinfo->measure_temp(0);
510 }
511
512 val = get_select_val(buff);
513
514 dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
515 if (val > sharpsl_pm.machinfo->charge_on_temp) {
516 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
517 return -1;
518 }
519
520 return 0;
521}
522
523#ifdef CONFIG_PM
524static int sharpsl_check_battery_voltage(void)
525{
526 int val, i, buff[5];
527
528 /* disable charge, enable discharge */
529 sharpsl_pm.machinfo->charge(0);
530 sharpsl_pm.machinfo->discharge(1);
531 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
532
533 if (sharpsl_pm.machinfo->discharge1)
534 sharpsl_pm.machinfo->discharge1(1);
535
536 /* Check battery voltage */
537 for (i = 0; i < 5; i++) {
538 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
539 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
540 }
541
542 if (sharpsl_pm.machinfo->discharge1)
543 sharpsl_pm.machinfo->discharge1(0);
544
545 sharpsl_pm.machinfo->discharge(0);
546
547 val = get_select_val(buff);
548 dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
549
550 if (val < sharpsl_pm.machinfo->charge_on_volt)
551 return -1;
552
553 return 0;
554}
555#endif
556
557static int sharpsl_ac_check(void)
558{
559 int temp, i, buff[5];
560
561 for (i = 0; i < 5; i++) {
562 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
563 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
564 }
565
566 temp = get_select_val(buff);
567 dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n", temp);
568
569 if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
570 dev_err(sharpsl_pm.dev, "Error: AC check failed: voltage %d.\n", temp);
571 return -1;
572 }
573
574 return 0;
575}
576
577#ifdef CONFIG_PM
578static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
579{
580 sharpsl_pm.flags |= SHARPSL_SUSPENDED;
581 flush_delayed_work(&toggle_charger);
582 flush_delayed_work(&sharpsl_bat);
583
584 if (sharpsl_pm.charge_mode == CHRG_ON)
585 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
586 else
587 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
588
589 return 0;
590}
591
592static int sharpsl_pm_resume(struct platform_device *pdev)
593{
594 /* Clear the reset source indicators as they break the bootloader upon reboot */
595 RCSR = 0x0f;
596 sharpsl_average_clear();
597 sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
598 sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
599
600 return 0;
601}
602
603static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
604{
605 dev_dbg(sharpsl_pm.dev, "Time is: %08x\n", RCNR);
606
607 dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n", sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
608 /* not charging and AC-IN! */
609
610 if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
611 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
612 sharpsl_pm.charge_mode = CHRG_OFF;
613 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
614 sharpsl_off_charge_battery();
615 }
616
617 sharpsl_pm.machinfo->presuspend();
618
619 PEDR = 0xffffffff; /* clear it */
620
621 sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
622 if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
623 RTSR &= RTSR_ALE;
624 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
625 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n", RTAR);
626 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
627 } else if (alarm_enable) {
628 RTSR &= RTSR_ALE;
629 RTAR = alarm_time;
630 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n", RTAR);
631 } else {
632 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
633 }
634
635 pxa_pm_enter(state);
636
637 sharpsl_pm.machinfo->postsuspend();
638
639 dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n", PEDR);
640}
641
642static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
643{
644 if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable)) {
645 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
646 dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
647 corgi_goto_sleep(alarm_time, alarm_enable, state);
648 return 1;
649 }
650 if (sharpsl_off_charge_battery()) {
651 dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
652 corgi_goto_sleep(alarm_time, alarm_enable, state);
653 return 1;
654 }
655 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
656 }
657
658 if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) ||
659 (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL))) {
660 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
661 corgi_goto_sleep(alarm_time, alarm_enable, state);
662 return 1;
663 }
664
665 return 0;
666}
667
668static int corgi_pxa_pm_enter(suspend_state_t state)
669{
670 unsigned long alarm_time = RTAR;
671 unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
672
673 dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
674
675 corgi_goto_sleep(alarm_time, alarm_status, state);
676
677 while (corgi_enter_suspend(alarm_time, alarm_status, state))
678 {}
679
680 if (sharpsl_pm.machinfo->earlyresume)
681 sharpsl_pm.machinfo->earlyresume();
682
683 dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
684
685 return 0;
686}
687
688static int sharpsl_off_charge_error(void)
689{
690 dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
691 sharpsl_pm.machinfo->charge(0);
692 sharpsl_pm_led(SHARPSL_LED_ERROR);
693 sharpsl_pm.charge_mode = CHRG_ERROR;
694 return 1;
695}
696
697/*
698 * Charging Control while suspended
699 * Return 1 - go straight to sleep
700 * Return 0 - sleep or wakeup depending on other factors
701 */
702static int sharpsl_off_charge_battery(void)
703{
704 int time;
705
706 dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
707
708 if (sharpsl_pm.charge_mode == CHRG_OFF) {
709 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
710
711 /* AC Check */
712 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
713 return sharpsl_off_charge_error();
714
715 /* Start Charging */
716 sharpsl_pm_led(SHARPSL_LED_ON);
717 sharpsl_pm.machinfo->charge(0);
718 mdelay(SHARPSL_CHARGE_WAIT_TIME);
719 sharpsl_pm.machinfo->charge(1);
720
721 sharpsl_pm.charge_mode = CHRG_ON;
722 sharpsl_pm.full_count = 0;
723
724 return 1;
725 } else if (sharpsl_pm.charge_mode != CHRG_ON) {
726 return 1;
727 }
728
729 if (sharpsl_pm.full_count == 0) {
730 int time;
731
732 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
733
734 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
735 return sharpsl_off_charge_error();
736
737 sharpsl_pm.machinfo->charge(0);
738 mdelay(SHARPSL_CHARGE_WAIT_TIME);
739 sharpsl_pm.machinfo->charge(1);
740 sharpsl_pm.charge_mode = CHRG_ON;
741
742 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
743
744 time = RCNR;
745 while (1) {
746 /* Check if any wakeup event had occurred */
747 if (sharpsl_pm.machinfo->charger_wakeup())
748 return 0;
749 /* Check for timeout */
750 if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
751 return 1;
752 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
753 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
754 sharpsl_pm.full_count++;
755 sharpsl_pm.machinfo->charge(0);
756 mdelay(SHARPSL_CHARGE_WAIT_TIME);
757 sharpsl_pm.machinfo->charge(1);
758 return 1;
759 }
760 }
761 }
762
763 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
764
765 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
766
767 time = RCNR;
768 while (1) {
769 /* Check if any wakeup event had occurred */
770 if (sharpsl_pm.machinfo->charger_wakeup())
771 return 0;
772 /* Check for timeout */
773 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
774 if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
775 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
776 sharpsl_pm.full_count = 0;
777 }
778 sharpsl_pm.full_count++;
779 return 1;
780 }
781 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
782 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
783 sharpsl_pm_led(SHARPSL_LED_OFF);
784 sharpsl_pm.machinfo->charge(0);
785 sharpsl_pm.charge_mode = CHRG_DONE;
786 return 1;
787 }
788 }
789}
790#else
791#define sharpsl_pm_suspend NULL
792#define sharpsl_pm_resume NULL
793#endif
794
795static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
796{
797 return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_percent);
798}
799
800static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
801{
802 return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_voltage);
803}
804
805static DEVICE_ATTR_RO(battery_percentage);
806static DEVICE_ATTR_RO(battery_voltage);
807
808extern void (*apm_get_power_status)(struct apm_power_info *);
809
810static void sharpsl_apm_get_power_status(struct apm_power_info *info)
811{
812 info->ac_line_status = sharpsl_pm.battstat.ac_status;
813
814 if (sharpsl_pm.charge_mode == CHRG_ON)
815 info->battery_status = APM_BATTERY_STATUS_CHARGING;
816 else
817 info->battery_status = sharpsl_pm.battstat.mainbat_status;
818
819 info->battery_flag = (1 << info->battery_status);
820 info->battery_life = sharpsl_pm.battstat.mainbat_percent;
821}
822
823#ifdef CONFIG_PM
824static const struct platform_suspend_ops sharpsl_pm_ops = {
825 .prepare = pxa_pm_prepare,
826 .finish = pxa_pm_finish,
827 .enter = corgi_pxa_pm_enter,
828 .valid = suspend_valid_only_mem,
829};
830#endif
831
832static int sharpsl_pm_probe(struct platform_device *pdev)
833{
834 int ret, irq;
835
836 if (!pdev->dev.platform_data)
837 return -EINVAL;
838
839 sharpsl_pm.dev = &pdev->dev;
840 sharpsl_pm.machinfo = pdev->dev.platform_data;
841 sharpsl_pm.charge_mode = CHRG_OFF;
842 sharpsl_pm.flags = 0;
843
844 timer_setup(&sharpsl_pm.ac_timer, sharpsl_ac_timer, 0);
845
846 timer_setup(&sharpsl_pm.chrg_full_timer, sharpsl_chrg_full_timer, 0);
847
848 led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
849
850 sharpsl_pm.machinfo->init();
851
852 gpio_request(sharpsl_pm.machinfo->gpio_acin, "AC IN");
853 gpio_direction_input(sharpsl_pm.machinfo->gpio_acin);
854 gpio_request(sharpsl_pm.machinfo->gpio_batfull, "Battery Full");
855 gpio_direction_input(sharpsl_pm.machinfo->gpio_batfull);
856 gpio_request(sharpsl_pm.machinfo->gpio_batlock, "Battery Lock");
857 gpio_direction_input(sharpsl_pm.machinfo->gpio_batlock);
858
859 /* Register interrupt handlers */
860 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_acin);
861 if (request_irq(irq, sharpsl_ac_isr, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "AC Input Detect", sharpsl_ac_isr)) {
862 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
863 }
864
865 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock);
866 if (request_irq(irq, sharpsl_fatal_isr, IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) {
867 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
868 }
869
870 if (sharpsl_pm.machinfo->gpio_fatal) {
871 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal);
872 if (request_irq(irq, sharpsl_fatal_isr, IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) {
873 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
874 }
875 }
876
877 if (sharpsl_pm.machinfo->batfull_irq) {
878 /* Register interrupt handler. */
879 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull);
880 if (request_irq(irq, sharpsl_chrg_full_isr, IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) {
881 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
882 }
883 }
884
885 ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
886 ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
887 if (ret != 0)
888 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
889
890 apm_get_power_status = sharpsl_apm_get_power_status;
891
892#ifdef CONFIG_PM
893 suspend_set_ops(&sharpsl_pm_ops);
894#endif
895
896 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
897
898 return 0;
899}
900
901static int sharpsl_pm_remove(struct platform_device *pdev)
902{
903 suspend_set_ops(NULL);
904
905 device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
906 device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
907
908 led_trigger_unregister_simple(sharpsl_charge_led_trigger);
909
910 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
911 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
912
913 if (sharpsl_pm.machinfo->gpio_fatal)
914 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
915
916 if (sharpsl_pm.machinfo->batfull_irq)
917 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
918
919 gpio_free(sharpsl_pm.machinfo->gpio_batlock);
920 gpio_free(sharpsl_pm.machinfo->gpio_batfull);
921 gpio_free(sharpsl_pm.machinfo->gpio_acin);
922
923 if (sharpsl_pm.machinfo->exit)
924 sharpsl_pm.machinfo->exit();
925
926 del_timer_sync(&sharpsl_pm.chrg_full_timer);
927 del_timer_sync(&sharpsl_pm.ac_timer);
928
929 return 0;
930}
931
932static struct platform_driver sharpsl_pm_driver = {
933 .probe = sharpsl_pm_probe,
934 .remove = sharpsl_pm_remove,
935 .suspend = sharpsl_pm_suspend,
936 .resume = sharpsl_pm_resume,
937 .driver = {
938 .name = "sharpsl-pm",
939 },
940};
941
942static int sharpsl_pm_init(void)
943{
944 return platform_driver_register(&sharpsl_pm_driver);
945}
946
947static void sharpsl_pm_exit(void)
948{
949 platform_driver_unregister(&sharpsl_pm_driver);
950}
951
952late_initcall(sharpsl_pm_init);
953module_exit(sharpsl_pm_exit);