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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / arch / arm / mach-pxa / sharpsl_pm.c
blobef9fd9b759cbd0172229cf550301623574a18d4f
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
56 static int sharpsl_off_charge_battery(void);
57 static int sharpsl_check_battery_voltage(void);
58 #endif
59 static int sharpsl_check_battery_temp(void);
60 static int sharpsl_ac_check(void);
61 static int sharpsl_average_value(int ad);
62 static void sharpsl_average_clear(void);
63 static void sharpsl_charge_toggle(struct work_struct *private_);
64 static void sharpsl_battery_thread(struct work_struct *private_);
65
66
67 /*
68 * Variables
69 */
70 struct sharpsl_pm_status sharpsl_pm;
71 static DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
72 static DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
73 DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
74
75
76
77 struct 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
120 struct 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
171 extern int max1111_read_channel(int);
172 /*
173 * Read MAX1111 ADC
174 */
175 int 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
187 static 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
204 static 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
223 void sharpsl_battery_kick(void)
224 {
225 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
226 }
227 EXPORT_SYMBOL(sharpsl_battery_kick);
228
229
230 static 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
283 void 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
296 static 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
306 static 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
317 static 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
324 static 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
344 static 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
360 static 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
369 static 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 */
395 static 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
406 static 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
432 static int sharpsl_ad_index;
433
434 static void sharpsl_average_clear(void)
435 {
436 sharpsl_ad_index = 0;
437 }
438
439 static 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 */
466 static 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
499 static 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
524 static 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
557 static 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
578 static 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
592 static 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
603 static 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
642 static 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
668 static 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
688 static 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 */
702 static 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
795 static 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
800 static 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
805 static DEVICE_ATTR_RO(battery_percentage);
806 static DEVICE_ATTR_RO(battery_voltage);
807
808 extern void (*apm_get_power_status)(struct apm_power_info *);
809
810 static 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
824 static 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
832 static 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
901 static 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
932 static 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
942 static int sharpsl_pm_init(void)
943 {
944 return platform_driver_register(&sharpsl_pm_driver);
945 }
946
947 static void sharpsl_pm_exit(void)
948 {
949 platform_driver_unregister(&sharpsl_pm_driver);
950 }
951
952 late_initcall(sharpsl_pm_init);
953 module_exit(sharpsl_pm_exit);
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