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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / arch / arm / common / sharpsl_pm.c
blob5bba5255b119dc7ee18d72cc8efc2d8c1d2963c2
1 /*
2 * Battery and Power Management code for the Sharp SL-C7xx and SL-Cxx00
3 * series of PDAs
4 *
5 * Copyright (c) 2004-2005 Richard Purdie
6 *
7 * Based on code written by Sharp for 2.4 kernels
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 */
14
15 #undef DEBUG
16
17 #include <linux/module.h>
18 #include <linux/timer.h>
19 #include <linux/init.h>
20 #include <linux/kernel.h>
21 #include <linux/apm_bios.h>
22 #include <linux/delay.h>
23 #include <linux/interrupt.h>
24 #include <linux/platform_device.h>
25 #include <linux/leds.h>
26 #include <linux/apm-emulation.h>
27 #include <linux/suspend.h>
28
29 #include <asm/hardware.h>
30 #include <asm/mach-types.h>
31 #include <asm/irq.h>
32 #include <asm/arch/pm.h>
33 #include <asm/arch/pxa-regs.h>
34 #include <asm/arch/sharpsl.h>
35 #include <asm/hardware/sharpsl_pm.h>
36
37 /*
38 * Constants
39 */
40 #define SHARPSL_CHARGE_ON_TIME_INTERVAL (msecs_to_jiffies(1*60*1000)) /* 1 min */
41 #define SHARPSL_CHARGE_FINISH_TIME (msecs_to_jiffies(10*60*1000)) /* 10 min */
42 #define SHARPSL_BATCHK_TIME (msecs_to_jiffies(15*1000)) /* 15 sec */
43 #define SHARPSL_BATCHK_TIME_SUSPEND (60*10) /* 10 min */
44
45 #define SHARPSL_WAIT_CO_TIME 15 /* 15 sec */
46 #define SHARPSL_WAIT_DISCHARGE_ON 100 /* 100 msec */
47 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP 10 /* 10 msec */
48 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT 10 /* 10 msec */
49 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN 10 /* 10 msec */
50 #define SHARPSL_CHARGE_WAIT_TIME 15 /* 15 msec */
51 #define SHARPSL_CHARGE_CO_CHECK_TIME 5 /* 5 msec */
52 #define SHARPSL_CHARGE_RETRY_CNT 1 /* eqv. 10 min */
53
54 /*
55 * Prototypes
56 */
57 static int sharpsl_off_charge_battery(void);
58 static int sharpsl_check_battery_temp(void);
59 static int sharpsl_check_battery_voltage(void);
60 static int sharpsl_ac_check(void);
61 static int sharpsl_fatal_check(void);
62 static int sharpsl_average_value(int ad);
63 static void sharpsl_average_clear(void);
64 static void sharpsl_charge_toggle(struct work_struct *private_);
65 static void sharpsl_battery_thread(struct work_struct *private_);
66
67
68 /*
69 * Variables
70 */
71 struct sharpsl_pm_status sharpsl_pm;
72 DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
73 DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
74 DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
75
76
77 static int get_percentage(int voltage)
78 {
79 int i = sharpsl_pm.machinfo->bat_levels - 1;
80 int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
81 struct battery_thresh *thresh;
82
83 if (sharpsl_pm.charge_mode == CHRG_ON)
84 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
85 else
86 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
87
88 while (i > 0 && (voltage > thresh[i].voltage))
89 i--;
90
91 return thresh[i].percentage;
92 }
93
94 static int get_apm_status(int voltage)
95 {
96 int low_thresh, high_thresh;
97
98 if (sharpsl_pm.charge_mode == CHRG_ON) {
99 high_thresh = sharpsl_pm.machinfo->status_high_acin;
100 low_thresh = sharpsl_pm.machinfo->status_low_acin;
101 } else {
102 high_thresh = sharpsl_pm.machinfo->status_high_noac;
103 low_thresh = sharpsl_pm.machinfo->status_low_noac;
104 }
105
106 if (voltage >= high_thresh)
107 return APM_BATTERY_STATUS_HIGH;
108 if (voltage >= low_thresh)
109 return APM_BATTERY_STATUS_LOW;
110 return APM_BATTERY_STATUS_CRITICAL;
111 }
112
113 void sharpsl_battery_kick(void)
114 {
115 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
116 }
117 EXPORT_SYMBOL(sharpsl_battery_kick);
118
119
120 static void sharpsl_battery_thread(struct work_struct *private_)
121 {
122 int voltage, percent, apm_status, i = 0;
123
124 if (!sharpsl_pm.machinfo)
125 return;
126
127 sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
128
129 /* Corgi cannot confirm when battery fully charged so periodically kick! */
130 if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
131 && time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_ON_TIME_INTERVAL))
132 schedule_delayed_work(&toggle_charger, 0);
133
134 while(1) {
135 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
136
137 if (voltage > 0) break;
138 if (i++ > 5) {
139 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
140 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
141 break;
142 }
143 }
144
145 voltage = sharpsl_average_value(voltage);
146 apm_status = get_apm_status(voltage);
147 percent = get_percentage(voltage);
148
149 /* At low battery voltages, the voltage has a tendency to start
150 creeping back up so we try to avoid this here */
151 if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE) || (apm_status == APM_BATTERY_STATUS_HIGH) || percent <= sharpsl_pm.battstat.mainbat_percent) {
152 sharpsl_pm.battstat.mainbat_voltage = voltage;
153 sharpsl_pm.battstat.mainbat_status = apm_status;
154 sharpsl_pm.battstat.mainbat_percent = percent;
155 }
156
157 dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
158 sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
159
160 /* If battery is low. limit backlight intensity to save power. */
161 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
162 && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW) ||
163 (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
164 if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
165 sharpsl_pm.machinfo->backlight_limit(1);
166 sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
167 }
168 } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
169 sharpsl_pm.machinfo->backlight_limit(0);
170 sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
171 }
172
173 /* Suspend if critical battery level */
174 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
175 && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
176 && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
177 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
178 dev_err(sharpsl_pm.dev, "Fatal Off\n");
179 apm_queue_event(APM_CRITICAL_SUSPEND);
180 }
181
182 schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
183 }
184
185 void sharpsl_pm_led(int val)
186 {
187 if (val == SHARPSL_LED_ERROR) {
188 dev_err(sharpsl_pm.dev, "Charging Error!\n");
189 } else if (val == SHARPSL_LED_ON) {
190 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
191 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
192 } else {
193 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
194 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
195 }
196 }
197
198 static void sharpsl_charge_on(void)
199 {
200 dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
201
202 sharpsl_pm.full_count = 0;
203 sharpsl_pm.charge_mode = CHRG_ON;
204 schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
205 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
206 }
207
208 static void sharpsl_charge_off(void)
209 {
210 dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
211
212 sharpsl_pm.machinfo->charge(0);
213 sharpsl_pm_led(SHARPSL_LED_OFF);
214 sharpsl_pm.charge_mode = CHRG_OFF;
215
216 schedule_delayed_work(&sharpsl_bat, 0);
217 }
218
219 static void sharpsl_charge_error(void)
220 {
221 sharpsl_pm_led(SHARPSL_LED_ERROR);
222 sharpsl_pm.machinfo->charge(0);
223 sharpsl_pm.charge_mode = CHRG_ERROR;
224 }
225
226 static void sharpsl_charge_toggle(struct work_struct *private_)
227 {
228 dev_dbg(sharpsl_pm.dev, "Toogling Charger at time: %lx\n", jiffies);
229
230 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
231 sharpsl_charge_off();
232 return;
233 } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
234 sharpsl_charge_error();
235 return;
236 }
237
238 sharpsl_pm_led(SHARPSL_LED_ON);
239 sharpsl_pm.machinfo->charge(0);
240 mdelay(SHARPSL_CHARGE_WAIT_TIME);
241 sharpsl_pm.machinfo->charge(1);
242
243 sharpsl_pm.charge_start_time = jiffies;
244 }
245
246 static void sharpsl_ac_timer(unsigned long data)
247 {
248 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
249
250 dev_dbg(sharpsl_pm.dev, "AC Status: %d\n",acin);
251
252 sharpsl_average_clear();
253 if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
254 sharpsl_charge_on();
255 else if (sharpsl_pm.charge_mode == CHRG_ON)
256 sharpsl_charge_off();
257
258 schedule_delayed_work(&sharpsl_bat, 0);
259 }
260
261
262 irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
263 {
264 /* Delay the event slightly to debounce */
265 /* Must be a smaller delay than the chrg_full_isr below */
266 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
267
268 return IRQ_HANDLED;
269 }
270
271 static void sharpsl_chrg_full_timer(unsigned long data)
272 {
273 dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
274
275 sharpsl_pm.full_count++;
276
277 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
278 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
279 if (sharpsl_pm.charge_mode == CHRG_ON)
280 sharpsl_charge_off();
281 } else if (sharpsl_pm.full_count < 2) {
282 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
283 schedule_delayed_work(&toggle_charger, 0);
284 } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
285 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
286 schedule_delayed_work(&toggle_charger, 0);
287 } else {
288 sharpsl_charge_off();
289 sharpsl_pm.charge_mode = CHRG_DONE;
290 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
291 }
292 }
293
294 /* Charging Finished Interrupt (Not present on Corgi) */
295 /* Can trigger at the same time as an AC status change so
296 delay until after that has been processed */
297 irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
298 {
299 if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
300 return IRQ_HANDLED;
301
302 /* delay until after any ac interrupt */
303 mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
304
305 return IRQ_HANDLED;
306 }
307
308 irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
309 {
310 int is_fatal = 0;
311
312 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
313 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
314 is_fatal = 1;
315 }
316
317 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
318 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
319 is_fatal = 1;
320 }
321
322 if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
323 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
324 apm_queue_event(APM_CRITICAL_SUSPEND);
325 }
326
327 return IRQ_HANDLED;
328 }
329
330 /*
331 * Maintain an average of the last 10 readings
332 */
333 #define SHARPSL_CNV_VALUE_NUM 10
334 static int sharpsl_ad_index;
335
336 static void sharpsl_average_clear(void)
337 {
338 sharpsl_ad_index = 0;
339 }
340
341 static int sharpsl_average_value(int ad)
342 {
343 int i, ad_val = 0;
344 static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
345
346 if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
347 sharpsl_ad_index = 0;
348 return ad;
349 }
350
351 sharpsl_ad[sharpsl_ad_index] = ad;
352 sharpsl_ad_index++;
353 if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
354 for (i=0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
355 sharpsl_ad[i] = sharpsl_ad[i+1];
356 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
357 }
358 for (i=0; i < sharpsl_ad_index; i++)
359 ad_val += sharpsl_ad[i];
360
361 return (ad_val / sharpsl_ad_index);
362 }
363
364 /*
365 * Take an array of 5 integers, remove the maximum and minimum values
366 * and return the average.
367 */
368 static int get_select_val(int *val)
369 {
370 int i, j, k, temp, sum = 0;
371
372 /* Find MAX val */
373 temp = val[0];
374 j=0;
375 for (i=1; i<5; i++) {
376 if (temp < val[i]) {
377 temp = val[i];
378 j = i;
379 }
380 }
381
382 /* Find MIN val */
383 temp = val[4];
384 k=4;
385 for (i=3; i>=0; i--) {
386 if (temp > val[i]) {
387 temp = val[i];
388 k = i;
389 }
390 }
391
392 for (i=0; i<5; i++)
393 if (i != j && i != k )
394 sum += val[i];
395
396 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]);
397
398 return (sum/3);
399 }
400
401 static int sharpsl_check_battery_temp(void)
402 {
403 int val, i, buff[5];
404
405 /* Check battery temperature */
406 for (i=0; i<5; i++) {
407 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
408 sharpsl_pm.machinfo->measure_temp(1);
409 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
410 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
411 sharpsl_pm.machinfo->measure_temp(0);
412 }
413
414 val = get_select_val(buff);
415
416 dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
417 if (val > sharpsl_pm.machinfo->charge_on_temp) {
418 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
419 return -1;
420 }
421
422 return 0;
423 }
424
425 static int sharpsl_check_battery_voltage(void)
426 {
427 int val, i, buff[5];
428
429 /* disable charge, enable discharge */
430 sharpsl_pm.machinfo->charge(0);
431 sharpsl_pm.machinfo->discharge(1);
432 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
433
434 if (sharpsl_pm.machinfo->discharge1)
435 sharpsl_pm.machinfo->discharge1(1);
436
437 /* Check battery voltage */
438 for (i=0; i<5; i++) {
439 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
440 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
441 }
442
443 if (sharpsl_pm.machinfo->discharge1)
444 sharpsl_pm.machinfo->discharge1(0);
445
446 sharpsl_pm.machinfo->discharge(0);
447
448 val = get_select_val(buff);
449 dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
450
451 if (val < sharpsl_pm.machinfo->charge_on_volt)
452 return -1;
453
454 return 0;
455 }
456
457 static int sharpsl_ac_check(void)
458 {
459 int temp, i, buff[5];
460
461 for (i=0; i<5; i++) {
462 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
463 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
464 }
465
466 temp = get_select_val(buff);
467 dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n",temp);
468
469 if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
470 dev_err(sharpsl_pm.dev, "Error: AC check failed.\n");
471 return -1;
472 }
473
474 return 0;
475 }
476
477 #ifdef CONFIG_PM
478 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
479 {
480 sharpsl_pm.flags |= SHARPSL_SUSPENDED;
481 flush_scheduled_work();
482
483 if (sharpsl_pm.charge_mode == CHRG_ON)
484 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
485 else
486 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
487
488 return 0;
489 }
490
491 static int sharpsl_pm_resume(struct platform_device *pdev)
492 {
493 /* Clear the reset source indicators as they break the bootloader upon reboot */
494 RCSR = 0x0f;
495 sharpsl_average_clear();
496 sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
497 sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
498
499 return 0;
500 }
501
502 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
503 {
504 dev_dbg(sharpsl_pm.dev, "Time is: %08x\n",RCNR);
505
506 dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n",sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
507 /* not charging and AC-IN! */
508
509 if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
510 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
511 sharpsl_pm.charge_mode = CHRG_OFF;
512 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
513 sharpsl_off_charge_battery();
514 }
515
516 sharpsl_pm.machinfo->presuspend();
517
518 PEDR = 0xffffffff; /* clear it */
519
520 sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
521 if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
522 RTSR &= RTSR_ALE;
523 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
524 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n",RTAR);
525 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
526 } else if (alarm_enable) {
527 RTSR &= RTSR_ALE;
528 RTAR = alarm_time;
529 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n",RTAR);
530 } else {
531 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
532 }
533
534 pxa_pm_enter(state);
535
536 sharpsl_pm.machinfo->postsuspend();
537
538 dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n",PEDR);
539 }
540
541 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
542 {
543 if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable) )
544 {
545 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
546 dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
547 corgi_goto_sleep(alarm_time, alarm_enable, state);
548 return 1;
549 }
550 if(sharpsl_off_charge_battery()) {
551 dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
552 corgi_goto_sleep(alarm_time, alarm_enable, state);
553 return 1;
554 }
555 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
556 }
557
558 if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) || (sharpsl_fatal_check() < 0) )
559 {
560 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
561 corgi_goto_sleep(alarm_time, alarm_enable, state);
562 return 1;
563 }
564
565 return 0;
566 }
567
568 static int corgi_pxa_pm_enter(suspend_state_t state)
569 {
570 unsigned long alarm_time = RTAR;
571 unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
572
573 dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
574
575 corgi_goto_sleep(alarm_time, alarm_status, state);
576
577 while (corgi_enter_suspend(alarm_time,alarm_status,state))
578 {}
579
580 if (sharpsl_pm.machinfo->earlyresume)
581 sharpsl_pm.machinfo->earlyresume();
582
583 dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
584
585 return 0;
586 }
587 #endif
588
589
590 /*
591 * Check for fatal battery errors
592 * Fatal returns -1
593 */
594 static int sharpsl_fatal_check(void)
595 {
596 int buff[5], temp, i, acin;
597
598 dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
599
600 /* Check AC-Adapter */
601 acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
602
603 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
604 sharpsl_pm.machinfo->charge(0);
605 udelay(100);
606 sharpsl_pm.machinfo->discharge(1); /* enable discharge */
607 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
608 }
609
610 if (sharpsl_pm.machinfo->discharge1)
611 sharpsl_pm.machinfo->discharge1(1);
612
613 /* Check battery : check inserting battery ? */
614 for (i=0; i<5; i++) {
615 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
616 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
617 }
618
619 if (sharpsl_pm.machinfo->discharge1)
620 sharpsl_pm.machinfo->discharge1(0);
621
622 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
623 udelay(100);
624 sharpsl_pm.machinfo->charge(1);
625 sharpsl_pm.machinfo->discharge(0);
626 }
627
628 temp = get_select_val(buff);
629 dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check: acin: %d, discharge voltage: %d, no discharge: %ld\n", acin, temp, sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT));
630
631 if ((acin && (temp < sharpsl_pm.machinfo->fatal_acin_volt)) ||
632 (!acin && (temp < sharpsl_pm.machinfo->fatal_noacin_volt)))
633 return -1;
634 return 0;
635 }
636
637 static int sharpsl_off_charge_error(void)
638 {
639 dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
640 sharpsl_pm.machinfo->charge(0);
641 sharpsl_pm_led(SHARPSL_LED_ERROR);
642 sharpsl_pm.charge_mode = CHRG_ERROR;
643 return 1;
644 }
645
646 /*
647 * Charging Control while suspended
648 * Return 1 - go straight to sleep
649 * Return 0 - sleep or wakeup depending on other factors
650 */
651 static int sharpsl_off_charge_battery(void)
652 {
653 int time;
654
655 dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
656
657 if (sharpsl_pm.charge_mode == CHRG_OFF) {
658 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
659
660 /* AC Check */
661 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
662 return sharpsl_off_charge_error();
663
664 /* Start Charging */
665 sharpsl_pm_led(SHARPSL_LED_ON);
666 sharpsl_pm.machinfo->charge(0);
667 mdelay(SHARPSL_CHARGE_WAIT_TIME);
668 sharpsl_pm.machinfo->charge(1);
669
670 sharpsl_pm.charge_mode = CHRG_ON;
671 sharpsl_pm.full_count = 0;
672
673 return 1;
674 } else if (sharpsl_pm.charge_mode != CHRG_ON) {
675 return 1;
676 }
677
678 if (sharpsl_pm.full_count == 0) {
679 int time;
680
681 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
682
683 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
684 return sharpsl_off_charge_error();
685
686 sharpsl_pm.machinfo->charge(0);
687 mdelay(SHARPSL_CHARGE_WAIT_TIME);
688 sharpsl_pm.machinfo->charge(1);
689 sharpsl_pm.charge_mode = CHRG_ON;
690
691 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
692
693 time = RCNR;
694 while(1) {
695 /* Check if any wakeup event had occurred */
696 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
697 return 0;
698 /* Check for timeout */
699 if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
700 return 1;
701 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
702 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
703 sharpsl_pm.full_count++;
704 sharpsl_pm.machinfo->charge(0);
705 mdelay(SHARPSL_CHARGE_WAIT_TIME);
706 sharpsl_pm.machinfo->charge(1);
707 return 1;
708 }
709 }
710 }
711
712 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
713
714 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
715
716 time = RCNR;
717 while(1) {
718 /* Check if any wakeup event had occurred */
719 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
720 return 0;
721 /* Check for timeout */
722 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
723 if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
724 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
725 sharpsl_pm.full_count = 0;
726 }
727 sharpsl_pm.full_count++;
728 return 1;
729 }
730 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
731 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
732 sharpsl_pm_led(SHARPSL_LED_OFF);
733 sharpsl_pm.machinfo->charge(0);
734 sharpsl_pm.charge_mode = CHRG_DONE;
735 return 1;
736 }
737 }
738 }
739
740
741 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
742 {
743 return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_percent);
744 }
745
746 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
747 {
748 return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_voltage);
749 }
750
751 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
752 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
753
754 extern void (*apm_get_power_status)(struct apm_power_info *);
755
756 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
757 {
758 info->ac_line_status = sharpsl_pm.battstat.ac_status;
759
760 if (sharpsl_pm.charge_mode == CHRG_ON)
761 info->battery_status = APM_BATTERY_STATUS_CHARGING;
762 else
763 info->battery_status = sharpsl_pm.battstat.mainbat_status;
764
765 info->battery_flag = (1 << info->battery_status);
766 info->battery_life = sharpsl_pm.battstat.mainbat_percent;
767 }
768
769 static struct platform_suspend_ops sharpsl_pm_ops = {
770 .enter = corgi_pxa_pm_enter,
771 .valid = suspend_valid_only_mem,
772 };
773
774 static int __init sharpsl_pm_probe(struct platform_device *pdev)
775 {
776 int ret;
777
778 if (!pdev->dev.platform_data)
779 return -EINVAL;
780
781 sharpsl_pm.dev = &pdev->dev;
782 sharpsl_pm.machinfo = pdev->dev.platform_data;
783 sharpsl_pm.charge_mode = CHRG_OFF;
784 sharpsl_pm.flags = 0;
785
786 init_timer(&sharpsl_pm.ac_timer);
787 sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
788
789 init_timer(&sharpsl_pm.chrg_full_timer);
790 sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
791
792 led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
793
794 sharpsl_pm.machinfo->init();
795
796 ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
797 ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
798 if (ret != 0)
799 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
800
801 apm_get_power_status = sharpsl_apm_get_power_status;
802
803 suspend_set_ops(&sharpsl_pm_ops);
804
805 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
806
807 return 0;
808 }
809
810 static int sharpsl_pm_remove(struct platform_device *pdev)
811 {
812 suspend_set_ops(NULL);
813
814 device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
815 device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
816
817 led_trigger_unregister_simple(sharpsl_charge_led_trigger);
818
819 sharpsl_pm.machinfo->exit();
820
821 del_timer_sync(&sharpsl_pm.chrg_full_timer);
822 del_timer_sync(&sharpsl_pm.ac_timer);
823
824 return 0;
825 }
826
827 static struct platform_driver sharpsl_pm_driver = {
828 .probe = sharpsl_pm_probe,
829 .remove = sharpsl_pm_remove,
830 .suspend = sharpsl_pm_suspend,
831 .resume = sharpsl_pm_resume,
832 .driver = {
833 .name = "sharpsl-pm",
834 },
835 };
836
837 static int __devinit sharpsl_pm_init(void)
838 {
839 return platform_driver_register(&sharpsl_pm_driver);
840 }
841
842 static void sharpsl_pm_exit(void)
843 {
844 platform_driver_unregister(&sharpsl_pm_driver);
845 }
846
847 late_initcall(sharpsl_pm_init);
848 module_exit(sharpsl_pm_exit);
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