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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/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 <mach/pm.h>
31#include <mach/pxa2xx-regs.h>
32#include <mach/regs-rtc.h>
33#include <mach/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(unsigned long data)
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(unsigned long data)
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() != 0)
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(battery_percentage, 0444, battery_percentage_show, NULL);
806static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
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 init_timer(&sharpsl_pm.ac_timer);
845 sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
846
847 init_timer(&sharpsl_pm.chrg_full_timer);
848 sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
849
850 led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
851
852 sharpsl_pm.machinfo->init();
853
854 gpio_request(sharpsl_pm.machinfo->gpio_acin, "AC IN");
855 gpio_direction_input(sharpsl_pm.machinfo->gpio_acin);
856 gpio_request(sharpsl_pm.machinfo->gpio_batfull, "Battery Full");
857 gpio_direction_input(sharpsl_pm.machinfo->gpio_batfull);
858 gpio_request(sharpsl_pm.machinfo->gpio_batlock, "Battery Lock");
859 gpio_direction_input(sharpsl_pm.machinfo->gpio_batlock);
860
861 /* Register interrupt handlers */
862 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_acin);
863 if (request_irq(irq, sharpsl_ac_isr, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "AC Input Detect", sharpsl_ac_isr)) {
864 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
865 }
866
867 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock);
868 if (request_irq(irq, sharpsl_fatal_isr, IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) {
869 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
870 }
871
872 if (sharpsl_pm.machinfo->gpio_fatal) {
873 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal);
874 if (request_irq(irq, sharpsl_fatal_isr, IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) {
875 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
876 }
877 }
878
879 if (sharpsl_pm.machinfo->batfull_irq) {
880 /* Register interrupt handler. */
881 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull);
882 if (request_irq(irq, sharpsl_chrg_full_isr, IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) {
883 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
884 }
885 }
886
887 ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
888 ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
889 if (ret != 0)
890 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
891
892 apm_get_power_status = sharpsl_apm_get_power_status;
893
894#ifdef CONFIG_PM
895 suspend_set_ops(&sharpsl_pm_ops);
896#endif
897
898 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
899
900 return 0;
901}
902
903static int sharpsl_pm_remove(struct platform_device *pdev)
904{
905 suspend_set_ops(NULL);
906
907 device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
908 device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
909
910 led_trigger_unregister_simple(sharpsl_charge_led_trigger);
911
912 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
913 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
914
915 if (sharpsl_pm.machinfo->gpio_fatal)
916 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
917
918 if (sharpsl_pm.machinfo->batfull_irq)
919 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
920
921 gpio_free(sharpsl_pm.machinfo->gpio_batlock);
922 gpio_free(sharpsl_pm.machinfo->gpio_batfull);
923 gpio_free(sharpsl_pm.machinfo->gpio_acin);
924
925 if (sharpsl_pm.machinfo->exit)
926 sharpsl_pm.machinfo->exit();
927
928 del_timer_sync(&sharpsl_pm.chrg_full_timer);
929 del_timer_sync(&sharpsl_pm.ac_timer);
930
931 return 0;
932}
933
934static struct platform_driver sharpsl_pm_driver = {
935 .probe = sharpsl_pm_probe,
936 .remove = sharpsl_pm_remove,
937 .suspend = sharpsl_pm_suspend,
938 .resume = sharpsl_pm_resume,
939 .driver = {
940 .name = "sharpsl-pm",
941 },
942};
943
944static int sharpsl_pm_init(void)
945{
946 return platform_driver_register(&sharpsl_pm_driver);
947}
948
949static void sharpsl_pm_exit(void)
950{
951 platform_driver_unregister(&sharpsl_pm_driver);
952}
953
954late_initcall(sharpsl_pm_init);
955module_exit(sharpsl_pm_exit);
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 <mach/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 /* Ugly, better move this function into another module */
174 if (machine_is_tosa())
175 return 0;
176
177 /* max1111 accepts channels from 0-3, however,
178 * it is encoded from 0-7 here in the code.
179 */
180 return max1111_read_channel(channel >> 1);
181}
182
183static int get_percentage(int voltage)
184{
185 int i = sharpsl_pm.machinfo->bat_levels - 1;
186 int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
187 struct battery_thresh *thresh;
188
189 if (sharpsl_pm.charge_mode == CHRG_ON)
190 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
191 else
192 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
193
194 while (i > 0 && (voltage > thresh[i].voltage))
195 i--;
196
197 return thresh[i].percentage;
198}
199
200static int get_apm_status(int voltage)
201{
202 int low_thresh, high_thresh;
203
204 if (sharpsl_pm.charge_mode == CHRG_ON) {
205 high_thresh = sharpsl_pm.machinfo->status_high_acin;
206 low_thresh = sharpsl_pm.machinfo->status_low_acin;
207 } else {
208 high_thresh = sharpsl_pm.machinfo->status_high_noac;
209 low_thresh = sharpsl_pm.machinfo->status_low_noac;
210 }
211
212 if (voltage >= high_thresh)
213 return APM_BATTERY_STATUS_HIGH;
214 if (voltage >= low_thresh)
215 return APM_BATTERY_STATUS_LOW;
216 return APM_BATTERY_STATUS_CRITICAL;
217}
218
219void sharpsl_battery_kick(void)
220{
221 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
222}
223EXPORT_SYMBOL(sharpsl_battery_kick);
224
225
226static void sharpsl_battery_thread(struct work_struct *private_)
227{
228 int voltage, percent, apm_status, i;
229
230 if (!sharpsl_pm.machinfo)
231 return;
232
233 sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
234
235 /* Corgi cannot confirm when battery fully charged so periodically kick! */
236 if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
237 && time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_ON_TIME_INTERVAL))
238 schedule_delayed_work(&toggle_charger, 0);
239
240 for (i = 0; i < 5; i++) {
241 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
242 if (voltage > 0)
243 break;
244 }
245 if (voltage <= 0) {
246 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
247 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
248 }
249
250 voltage = sharpsl_average_value(voltage);
251 apm_status = get_apm_status(voltage);
252 percent = get_percentage(voltage);
253
254 /* At low battery voltages, the voltage has a tendency to start
255 creeping back up so we try to avoid this here */
256 if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE)
257 || (apm_status == APM_BATTERY_STATUS_HIGH)
258 || percent <= sharpsl_pm.battstat.mainbat_percent) {
259 sharpsl_pm.battstat.mainbat_voltage = voltage;
260 sharpsl_pm.battstat.mainbat_status = apm_status;
261 sharpsl_pm.battstat.mainbat_percent = percent;
262 }
263
264 dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
265 sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
266
267 /* Suspend if critical battery level */
268 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
269 && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
270 && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
271 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
272 dev_err(sharpsl_pm.dev, "Fatal Off\n");
273 apm_queue_event(APM_CRITICAL_SUSPEND);
274 }
275
276 schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
277}
278
279void sharpsl_pm_led(int val)
280{
281 if (val == SHARPSL_LED_ERROR) {
282 dev_err(sharpsl_pm.dev, "Charging Error!\n");
283 } else if (val == SHARPSL_LED_ON) {
284 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
285 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
286 } else {
287 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
288 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
289 }
290}
291
292static void sharpsl_charge_on(void)
293{
294 dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
295
296 sharpsl_pm.full_count = 0;
297 sharpsl_pm.charge_mode = CHRG_ON;
298 schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
299 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
300}
301
302static void sharpsl_charge_off(void)
303{
304 dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
305
306 sharpsl_pm.machinfo->charge(0);
307 sharpsl_pm_led(SHARPSL_LED_OFF);
308 sharpsl_pm.charge_mode = CHRG_OFF;
309
310 schedule_delayed_work(&sharpsl_bat, 0);
311}
312
313static void sharpsl_charge_error(void)
314{
315 sharpsl_pm_led(SHARPSL_LED_ERROR);
316 sharpsl_pm.machinfo->charge(0);
317 sharpsl_pm.charge_mode = CHRG_ERROR;
318}
319
320static void sharpsl_charge_toggle(struct work_struct *private_)
321{
322 dev_dbg(sharpsl_pm.dev, "Toggling Charger at time: %lx\n", jiffies);
323
324 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
325 sharpsl_charge_off();
326 return;
327 } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
328 sharpsl_charge_error();
329 return;
330 }
331
332 sharpsl_pm_led(SHARPSL_LED_ON);
333 sharpsl_pm.machinfo->charge(0);
334 mdelay(SHARPSL_CHARGE_WAIT_TIME);
335 sharpsl_pm.machinfo->charge(1);
336
337 sharpsl_pm.charge_start_time = jiffies;
338}
339
340static void sharpsl_ac_timer(struct timer_list *unused)
341{
342 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
343
344 dev_dbg(sharpsl_pm.dev, "AC Status: %d\n", acin);
345
346 sharpsl_average_clear();
347 if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
348 sharpsl_charge_on();
349 else if (sharpsl_pm.charge_mode == CHRG_ON)
350 sharpsl_charge_off();
351
352 schedule_delayed_work(&sharpsl_bat, 0);
353}
354
355
356static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
357{
358 /* Delay the event slightly to debounce */
359 /* Must be a smaller delay than the chrg_full_isr below */
360 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
361
362 return IRQ_HANDLED;
363}
364
365static void sharpsl_chrg_full_timer(struct timer_list *unused)
366{
367 dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
368
369 sharpsl_pm.full_count++;
370
371 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
372 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
373 if (sharpsl_pm.charge_mode == CHRG_ON)
374 sharpsl_charge_off();
375 } else if (sharpsl_pm.full_count < 2) {
376 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
377 schedule_delayed_work(&toggle_charger, 0);
378 } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
379 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
380 schedule_delayed_work(&toggle_charger, 0);
381 } else {
382 sharpsl_charge_off();
383 sharpsl_pm.charge_mode = CHRG_DONE;
384 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
385 }
386}
387
388/* Charging Finished Interrupt (Not present on Corgi) */
389/* Can trigger at the same time as an AC status change so
390 delay until after that has been processed */
391static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
392{
393 if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
394 return IRQ_HANDLED;
395
396 /* delay until after any ac interrupt */
397 mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
398
399 return IRQ_HANDLED;
400}
401
402static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
403{
404 int is_fatal = 0;
405
406 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
407 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
408 is_fatal = 1;
409 }
410
411 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
412 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
413 is_fatal = 1;
414 }
415
416 if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
417 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
418 apm_queue_event(APM_CRITICAL_SUSPEND);
419 }
420
421 return IRQ_HANDLED;
422}
423
424/*
425 * Maintain an average of the last 10 readings
426 */
427#define SHARPSL_CNV_VALUE_NUM 10
428static int sharpsl_ad_index;
429
430static void sharpsl_average_clear(void)
431{
432 sharpsl_ad_index = 0;
433}
434
435static int sharpsl_average_value(int ad)
436{
437 int i, ad_val = 0;
438 static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
439
440 if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
441 sharpsl_ad_index = 0;
442 return ad;
443 }
444
445 sharpsl_ad[sharpsl_ad_index] = ad;
446 sharpsl_ad_index++;
447 if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
448 for (i = 0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
449 sharpsl_ad[i] = sharpsl_ad[i+1];
450 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
451 }
452 for (i = 0; i < sharpsl_ad_index; i++)
453 ad_val += sharpsl_ad[i];
454
455 return ad_val / sharpsl_ad_index;
456}
457
458/*
459 * Take an array of 5 integers, remove the maximum and minimum values
460 * and return the average.
461 */
462static int get_select_val(int *val)
463{
464 int i, j, k, temp, sum = 0;
465
466 /* Find MAX val */
467 temp = val[0];
468 j = 0;
469 for (i = 1; i < 5; i++) {
470 if (temp < val[i]) {
471 temp = val[i];
472 j = i;
473 }
474 }
475
476 /* Find MIN val */
477 temp = val[4];
478 k = 4;
479 for (i = 3; i >= 0; i--) {
480 if (temp > val[i]) {
481 temp = val[i];
482 k = i;
483 }
484 }
485
486 for (i = 0; i < 5; i++)
487 if (i != j && i != k)
488 sum += val[i];
489
490 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]);
491
492 return sum/3;
493}
494
495static int sharpsl_check_battery_temp(void)
496{
497 int val, i, buff[5];
498
499 /* Check battery temperature */
500 for (i = 0; i < 5; i++) {
501 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
502 sharpsl_pm.machinfo->measure_temp(1);
503 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
504 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
505 sharpsl_pm.machinfo->measure_temp(0);
506 }
507
508 val = get_select_val(buff);
509
510 dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
511 if (val > sharpsl_pm.machinfo->charge_on_temp) {
512 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
513 return -1;
514 }
515
516 return 0;
517}
518
519#ifdef CONFIG_PM
520static int sharpsl_check_battery_voltage(void)
521{
522 int val, i, buff[5];
523
524 /* disable charge, enable discharge */
525 sharpsl_pm.machinfo->charge(0);
526 sharpsl_pm.machinfo->discharge(1);
527 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
528
529 if (sharpsl_pm.machinfo->discharge1)
530 sharpsl_pm.machinfo->discharge1(1);
531
532 /* Check battery voltage */
533 for (i = 0; i < 5; i++) {
534 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
535 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
536 }
537
538 if (sharpsl_pm.machinfo->discharge1)
539 sharpsl_pm.machinfo->discharge1(0);
540
541 sharpsl_pm.machinfo->discharge(0);
542
543 val = get_select_val(buff);
544 dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
545
546 if (val < sharpsl_pm.machinfo->charge_on_volt)
547 return -1;
548
549 return 0;
550}
551#endif
552
553static int sharpsl_ac_check(void)
554{
555 int temp, i, buff[5];
556
557 for (i = 0; i < 5; i++) {
558 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
559 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
560 }
561
562 temp = get_select_val(buff);
563 dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n", temp);
564
565 if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
566 dev_err(sharpsl_pm.dev, "Error: AC check failed: voltage %d.\n", temp);
567 return -1;
568 }
569
570 return 0;
571}
572
573#ifdef CONFIG_PM
574static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
575{
576 sharpsl_pm.flags |= SHARPSL_SUSPENDED;
577 flush_delayed_work(&toggle_charger);
578 flush_delayed_work(&sharpsl_bat);
579
580 if (sharpsl_pm.charge_mode == CHRG_ON)
581 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
582 else
583 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
584
585 return 0;
586}
587
588static int sharpsl_pm_resume(struct platform_device *pdev)
589{
590 /* Clear the reset source indicators as they break the bootloader upon reboot */
591 RCSR = 0x0f;
592 sharpsl_average_clear();
593 sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
594 sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
595
596 return 0;
597}
598
599static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
600{
601 dev_dbg(sharpsl_pm.dev, "Time is: %08x\n", RCNR);
602
603 dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n", sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
604 /* not charging and AC-IN! */
605
606 if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
607 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
608 sharpsl_pm.charge_mode = CHRG_OFF;
609 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
610 sharpsl_off_charge_battery();
611 }
612
613 sharpsl_pm.machinfo->presuspend();
614
615 PEDR = 0xffffffff; /* clear it */
616
617 sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
618 if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
619 RTSR &= RTSR_ALE;
620 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
621 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n", RTAR);
622 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
623 } else if (alarm_enable) {
624 RTSR &= RTSR_ALE;
625 RTAR = alarm_time;
626 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n", RTAR);
627 } else {
628 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
629 }
630
631 pxa_pm_enter(state);
632
633 sharpsl_pm.machinfo->postsuspend();
634
635 dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n", PEDR);
636}
637
638static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
639{
640 if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable)) {
641 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
642 dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
643 corgi_goto_sleep(alarm_time, alarm_enable, state);
644 return 1;
645 }
646 if (sharpsl_off_charge_battery()) {
647 dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
648 corgi_goto_sleep(alarm_time, alarm_enable, state);
649 return 1;
650 }
651 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
652 }
653
654 if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) ||
655 (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL))) {
656 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
657 corgi_goto_sleep(alarm_time, alarm_enable, state);
658 return 1;
659 }
660
661 return 0;
662}
663
664static int corgi_pxa_pm_enter(suspend_state_t state)
665{
666 unsigned long alarm_time = RTAR;
667 unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
668
669 dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
670
671 corgi_goto_sleep(alarm_time, alarm_status, state);
672
673 while (corgi_enter_suspend(alarm_time, alarm_status, state))
674 {}
675
676 if (sharpsl_pm.machinfo->earlyresume)
677 sharpsl_pm.machinfo->earlyresume();
678
679 dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
680
681 return 0;
682}
683
684static int sharpsl_off_charge_error(void)
685{
686 dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
687 sharpsl_pm.machinfo->charge(0);
688 sharpsl_pm_led(SHARPSL_LED_ERROR);
689 sharpsl_pm.charge_mode = CHRG_ERROR;
690 return 1;
691}
692
693/*
694 * Charging Control while suspended
695 * Return 1 - go straight to sleep
696 * Return 0 - sleep or wakeup depending on other factors
697 */
698static int sharpsl_off_charge_battery(void)
699{
700 int time;
701
702 dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
703
704 if (sharpsl_pm.charge_mode == CHRG_OFF) {
705 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
706
707 /* AC Check */
708 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
709 return sharpsl_off_charge_error();
710
711 /* Start Charging */
712 sharpsl_pm_led(SHARPSL_LED_ON);
713 sharpsl_pm.machinfo->charge(0);
714 mdelay(SHARPSL_CHARGE_WAIT_TIME);
715 sharpsl_pm.machinfo->charge(1);
716
717 sharpsl_pm.charge_mode = CHRG_ON;
718 sharpsl_pm.full_count = 0;
719
720 return 1;
721 } else if (sharpsl_pm.charge_mode != CHRG_ON) {
722 return 1;
723 }
724
725 if (sharpsl_pm.full_count == 0) {
726 int time;
727
728 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
729
730 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
731 return sharpsl_off_charge_error();
732
733 sharpsl_pm.machinfo->charge(0);
734 mdelay(SHARPSL_CHARGE_WAIT_TIME);
735 sharpsl_pm.machinfo->charge(1);
736 sharpsl_pm.charge_mode = CHRG_ON;
737
738 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
739
740 time = RCNR;
741 while (1) {
742 /* Check if any wakeup event had occurred */
743 if (sharpsl_pm.machinfo->charger_wakeup())
744 return 0;
745 /* Check for timeout */
746 if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
747 return 1;
748 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
749 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
750 sharpsl_pm.full_count++;
751 sharpsl_pm.machinfo->charge(0);
752 mdelay(SHARPSL_CHARGE_WAIT_TIME);
753 sharpsl_pm.machinfo->charge(1);
754 return 1;
755 }
756 }
757 }
758
759 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
760
761 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
762
763 time = RCNR;
764 while (1) {
765 /* Check if any wakeup event had occurred */
766 if (sharpsl_pm.machinfo->charger_wakeup())
767 return 0;
768 /* Check for timeout */
769 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
770 if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
771 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
772 sharpsl_pm.full_count = 0;
773 }
774 sharpsl_pm.full_count++;
775 return 1;
776 }
777 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
778 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
779 sharpsl_pm_led(SHARPSL_LED_OFF);
780 sharpsl_pm.machinfo->charge(0);
781 sharpsl_pm.charge_mode = CHRG_DONE;
782 return 1;
783 }
784 }
785}
786#else
787#define sharpsl_pm_suspend NULL
788#define sharpsl_pm_resume NULL
789#endif
790
791static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
792{
793 return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_percent);
794}
795
796static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
797{
798 return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_voltage);
799}
800
801static DEVICE_ATTR_RO(battery_percentage);
802static DEVICE_ATTR_RO(battery_voltage);
803
804extern void (*apm_get_power_status)(struct apm_power_info *);
805
806static void sharpsl_apm_get_power_status(struct apm_power_info *info)
807{
808 info->ac_line_status = sharpsl_pm.battstat.ac_status;
809
810 if (sharpsl_pm.charge_mode == CHRG_ON)
811 info->battery_status = APM_BATTERY_STATUS_CHARGING;
812 else
813 info->battery_status = sharpsl_pm.battstat.mainbat_status;
814
815 info->battery_flag = (1 << info->battery_status);
816 info->battery_life = sharpsl_pm.battstat.mainbat_percent;
817}
818
819#ifdef CONFIG_PM
820static const struct platform_suspend_ops sharpsl_pm_ops = {
821 .prepare = pxa_pm_prepare,
822 .finish = pxa_pm_finish,
823 .enter = corgi_pxa_pm_enter,
824 .valid = suspend_valid_only_mem,
825};
826#endif
827
828static int sharpsl_pm_probe(struct platform_device *pdev)
829{
830 int ret, irq;
831
832 if (!pdev->dev.platform_data)
833 return -EINVAL;
834
835 sharpsl_pm.dev = &pdev->dev;
836 sharpsl_pm.machinfo = pdev->dev.platform_data;
837 sharpsl_pm.charge_mode = CHRG_OFF;
838 sharpsl_pm.flags = 0;
839
840 timer_setup(&sharpsl_pm.ac_timer, sharpsl_ac_timer, 0);
841
842 timer_setup(&sharpsl_pm.chrg_full_timer, sharpsl_chrg_full_timer, 0);
843
844 led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
845
846 sharpsl_pm.machinfo->init();
847
848 gpio_request(sharpsl_pm.machinfo->gpio_acin, "AC IN");
849 gpio_direction_input(sharpsl_pm.machinfo->gpio_acin);
850 gpio_request(sharpsl_pm.machinfo->gpio_batfull, "Battery Full");
851 gpio_direction_input(sharpsl_pm.machinfo->gpio_batfull);
852 gpio_request(sharpsl_pm.machinfo->gpio_batlock, "Battery Lock");
853 gpio_direction_input(sharpsl_pm.machinfo->gpio_batlock);
854
855 /* Register interrupt handlers */
856 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_acin);
857 if (request_irq(irq, sharpsl_ac_isr, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "AC Input Detect", sharpsl_ac_isr)) {
858 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
859 }
860
861 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock);
862 if (request_irq(irq, sharpsl_fatal_isr, IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) {
863 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
864 }
865
866 if (sharpsl_pm.machinfo->gpio_fatal) {
867 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal);
868 if (request_irq(irq, sharpsl_fatal_isr, IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) {
869 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
870 }
871 }
872
873 if (sharpsl_pm.machinfo->batfull_irq) {
874 /* Register interrupt handler. */
875 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull);
876 if (request_irq(irq, sharpsl_chrg_full_isr, IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) {
877 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
878 }
879 }
880
881 ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
882 ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
883 if (ret != 0)
884 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
885
886 apm_get_power_status = sharpsl_apm_get_power_status;
887
888#ifdef CONFIG_PM
889 suspend_set_ops(&sharpsl_pm_ops);
890#endif
891
892 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
893
894 return 0;
895}
896
897static int sharpsl_pm_remove(struct platform_device *pdev)
898{
899 suspend_set_ops(NULL);
900
901 device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
902 device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
903
904 led_trigger_unregister_simple(sharpsl_charge_led_trigger);
905
906 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
907 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
908
909 if (sharpsl_pm.machinfo->gpio_fatal)
910 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
911
912 if (sharpsl_pm.machinfo->batfull_irq)
913 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
914
915 gpio_free(sharpsl_pm.machinfo->gpio_batlock);
916 gpio_free(sharpsl_pm.machinfo->gpio_batfull);
917 gpio_free(sharpsl_pm.machinfo->gpio_acin);
918
919 if (sharpsl_pm.machinfo->exit)
920 sharpsl_pm.machinfo->exit();
921
922 del_timer_sync(&sharpsl_pm.chrg_full_timer);
923 del_timer_sync(&sharpsl_pm.ac_timer);
924
925 return 0;
926}
927
928static struct platform_driver sharpsl_pm_driver = {
929 .probe = sharpsl_pm_probe,
930 .remove = sharpsl_pm_remove,
931 .suspend = sharpsl_pm_suspend,
932 .resume = sharpsl_pm_resume,
933 .driver = {
934 .name = "sharpsl-pm",
935 },
936};
937
938static int sharpsl_pm_init(void)
939{
940 return platform_driver_register(&sharpsl_pm_driver);
941}
942
943static void sharpsl_pm_exit(void)
944{
945 platform_driver_unregister(&sharpsl_pm_driver);
946}
947
948late_initcall(sharpsl_pm_init);
949module_exit(sharpsl_pm_exit);