?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[SCSI] scsi_dh: add generic SPC-3 alua handler
[linux-2.6/verdex.git] / arch / arm / common / sharpsl_pm.c
blob8822b684d474ad322b71bbcf3fe457316fdba775
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/pxa2xx-regs.h>
35 #include <asm/arch/sharpsl.h>
36 #include <asm/hardware/sharpsl_pm.h>
37
38 /*
39 * Constants
40 */
41 #define SHARPSL_CHARGE_ON_TIME_INTERVAL (msecs_to_jiffies(1*60*1000)) /* 1 min */
42 #define SHARPSL_CHARGE_FINISH_TIME (msecs_to_jiffies(10*60*1000)) /* 10 min */
43 #define SHARPSL_BATCHK_TIME (msecs_to_jiffies(15*1000)) /* 15 sec */
44 #define SHARPSL_BATCHK_TIME_SUSPEND (60*10) /* 10 min */
45
46 #define SHARPSL_WAIT_CO_TIME 15 /* 15 sec */
47 #define SHARPSL_WAIT_DISCHARGE_ON 100 /* 100 msec */
48 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP 10 /* 10 msec */
49 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT 10 /* 10 msec */
50 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN 10 /* 10 msec */
51 #define SHARPSL_CHARGE_WAIT_TIME 15 /* 15 msec */
52 #define SHARPSL_CHARGE_CO_CHECK_TIME 5 /* 5 msec */
53 #define SHARPSL_CHARGE_RETRY_CNT 1 /* eqv. 10 min */
54
55 /*
56 * Prototypes
57 */
58 static int sharpsl_off_charge_battery(void);
59 static int sharpsl_check_battery_temp(void);
60 static int sharpsl_check_battery_voltage(void);
61 static int sharpsl_ac_check(void);
62 static int sharpsl_fatal_check(void);
63 static int sharpsl_average_value(int ad);
64 static void sharpsl_average_clear(void);
65 static void sharpsl_charge_toggle(struct work_struct *private_);
66 static void sharpsl_battery_thread(struct work_struct *private_);
67
68
69 /*
70 * Variables
71 */
72 struct sharpsl_pm_status sharpsl_pm;
73 DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
74 DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
75 DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
76
77
78 static int get_percentage(int voltage)
79 {
80 int i = sharpsl_pm.machinfo->bat_levels - 1;
81 int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
82 struct battery_thresh *thresh;
83
84 if (sharpsl_pm.charge_mode == CHRG_ON)
85 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
86 else
87 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
88
89 while (i > 0 && (voltage > thresh[i].voltage))
90 i--;
91
92 return thresh[i].percentage;
93 }
94
95 static int get_apm_status(int voltage)
96 {
97 int low_thresh, high_thresh;
98
99 if (sharpsl_pm.charge_mode == CHRG_ON) {
100 high_thresh = sharpsl_pm.machinfo->status_high_acin;
101 low_thresh = sharpsl_pm.machinfo->status_low_acin;
102 } else {
103 high_thresh = sharpsl_pm.machinfo->status_high_noac;
104 low_thresh = sharpsl_pm.machinfo->status_low_noac;
105 }
106
107 if (voltage >= high_thresh)
108 return APM_BATTERY_STATUS_HIGH;
109 if (voltage >= low_thresh)
110 return APM_BATTERY_STATUS_LOW;
111 return APM_BATTERY_STATUS_CRITICAL;
112 }
113
114 void sharpsl_battery_kick(void)
115 {
116 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
117 }
118 EXPORT_SYMBOL(sharpsl_battery_kick);
119
120
121 static void sharpsl_battery_thread(struct work_struct *private_)
122 {
123 int voltage, percent, apm_status, i = 0;
124
125 if (!sharpsl_pm.machinfo)
126 return;
127
128 sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
129
130 /* Corgi cannot confirm when battery fully charged so periodically kick! */
131 if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
132 && time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_ON_TIME_INTERVAL))
133 schedule_delayed_work(&toggle_charger, 0);
134
135 while(1) {
136 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
137
138 if (voltage > 0) break;
139 if (i++ > 5) {
140 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
141 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
142 break;
143 }
144 }
145
146 voltage = sharpsl_average_value(voltage);
147 apm_status = get_apm_status(voltage);
148 percent = get_percentage(voltage);
149
150 /* At low battery voltages, the voltage has a tendency to start
151 creeping back up so we try to avoid this here */
152 if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE) || (apm_status == APM_BATTERY_STATUS_HIGH) || percent <= sharpsl_pm.battstat.mainbat_percent) {
153 sharpsl_pm.battstat.mainbat_voltage = voltage;
154 sharpsl_pm.battstat.mainbat_status = apm_status;
155 sharpsl_pm.battstat.mainbat_percent = percent;
156 }
157
158 dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
159 sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
160
161 #ifdef CONFIG_BACKLIGHT_CORGI
162 /* If battery is low. limit backlight intensity to save power. */
163 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
164 && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW) ||
165 (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
166 if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
167 sharpsl_pm.machinfo->backlight_limit(1);
168 sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
169 }
170 } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
171 sharpsl_pm.machinfo->backlight_limit(0);
172 sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
173 }
174 #endif
175
176 /* Suspend if critical battery level */
177 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
178 && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
179 && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
180 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
181 dev_err(sharpsl_pm.dev, "Fatal Off\n");
182 apm_queue_event(APM_CRITICAL_SUSPEND);
183 }
184
185 schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
186 }
187
188 void sharpsl_pm_led(int val)
189 {
190 if (val == SHARPSL_LED_ERROR) {
191 dev_err(sharpsl_pm.dev, "Charging Error!\n");
192 } else if (val == SHARPSL_LED_ON) {
193 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
194 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
195 } else {
196 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
197 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
198 }
199 }
200
201 static void sharpsl_charge_on(void)
202 {
203 dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
204
205 sharpsl_pm.full_count = 0;
206 sharpsl_pm.charge_mode = CHRG_ON;
207 schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
208 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
209 }
210
211 static void sharpsl_charge_off(void)
212 {
213 dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
214
215 sharpsl_pm.machinfo->charge(0);
216 sharpsl_pm_led(SHARPSL_LED_OFF);
217 sharpsl_pm.charge_mode = CHRG_OFF;
218
219 schedule_delayed_work(&sharpsl_bat, 0);
220 }
221
222 static void sharpsl_charge_error(void)
223 {
224 sharpsl_pm_led(SHARPSL_LED_ERROR);
225 sharpsl_pm.machinfo->charge(0);
226 sharpsl_pm.charge_mode = CHRG_ERROR;
227 }
228
229 static void sharpsl_charge_toggle(struct work_struct *private_)
230 {
231 dev_dbg(sharpsl_pm.dev, "Toogling Charger at time: %lx\n", jiffies);
232
233 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
234 sharpsl_charge_off();
235 return;
236 } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
237 sharpsl_charge_error();
238 return;
239 }
240
241 sharpsl_pm_led(SHARPSL_LED_ON);
242 sharpsl_pm.machinfo->charge(0);
243 mdelay(SHARPSL_CHARGE_WAIT_TIME);
244 sharpsl_pm.machinfo->charge(1);
245
246 sharpsl_pm.charge_start_time = jiffies;
247 }
248
249 static void sharpsl_ac_timer(unsigned long data)
250 {
251 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
252
253 dev_dbg(sharpsl_pm.dev, "AC Status: %d\n",acin);
254
255 sharpsl_average_clear();
256 if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
257 sharpsl_charge_on();
258 else if (sharpsl_pm.charge_mode == CHRG_ON)
259 sharpsl_charge_off();
260
261 schedule_delayed_work(&sharpsl_bat, 0);
262 }
263
264
265 irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
266 {
267 /* Delay the event slightly to debounce */
268 /* Must be a smaller delay than the chrg_full_isr below */
269 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
270
271 return IRQ_HANDLED;
272 }
273
274 static void sharpsl_chrg_full_timer(unsigned long data)
275 {
276 dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
277
278 sharpsl_pm.full_count++;
279
280 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
281 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
282 if (sharpsl_pm.charge_mode == CHRG_ON)
283 sharpsl_charge_off();
284 } else if (sharpsl_pm.full_count < 2) {
285 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
286 schedule_delayed_work(&toggle_charger, 0);
287 } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
288 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
289 schedule_delayed_work(&toggle_charger, 0);
290 } else {
291 sharpsl_charge_off();
292 sharpsl_pm.charge_mode = CHRG_DONE;
293 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
294 }
295 }
296
297 /* Charging Finished Interrupt (Not present on Corgi) */
298 /* Can trigger at the same time as an AC status change so
299 delay until after that has been processed */
300 irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
301 {
302 if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
303 return IRQ_HANDLED;
304
305 /* delay until after any ac interrupt */
306 mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
307
308 return IRQ_HANDLED;
309 }
310
311 irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
312 {
313 int is_fatal = 0;
314
315 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
316 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
317 is_fatal = 1;
318 }
319
320 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
321 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
322 is_fatal = 1;
323 }
324
325 if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
326 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
327 apm_queue_event(APM_CRITICAL_SUSPEND);
328 }
329
330 return IRQ_HANDLED;
331 }
332
333 /*
334 * Maintain an average of the last 10 readings
335 */
336 #define SHARPSL_CNV_VALUE_NUM 10
337 static int sharpsl_ad_index;
338
339 static void sharpsl_average_clear(void)
340 {
341 sharpsl_ad_index = 0;
342 }
343
344 static int sharpsl_average_value(int ad)
345 {
346 int i, ad_val = 0;
347 static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
348
349 if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
350 sharpsl_ad_index = 0;
351 return ad;
352 }
353
354 sharpsl_ad[sharpsl_ad_index] = ad;
355 sharpsl_ad_index++;
356 if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
357 for (i=0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
358 sharpsl_ad[i] = sharpsl_ad[i+1];
359 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
360 }
361 for (i=0; i < sharpsl_ad_index; i++)
362 ad_val += sharpsl_ad[i];
363
364 return (ad_val / sharpsl_ad_index);
365 }
366
367 /*
368 * Take an array of 5 integers, remove the maximum and minimum values
369 * and return the average.
370 */
371 static int get_select_val(int *val)
372 {
373 int i, j, k, temp, sum = 0;
374
375 /* Find MAX val */
376 temp = val[0];
377 j=0;
378 for (i=1; i<5; i++) {
379 if (temp < val[i]) {
380 temp = val[i];
381 j = i;
382 }
383 }
384
385 /* Find MIN val */
386 temp = val[4];
387 k=4;
388 for (i=3; i>=0; i--) {
389 if (temp > val[i]) {
390 temp = val[i];
391 k = i;
392 }
393 }
394
395 for (i=0; i<5; i++)
396 if (i != j && i != k )
397 sum += val[i];
398
399 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]);
400
401 return (sum/3);
402 }
403
404 static int sharpsl_check_battery_temp(void)
405 {
406 int val, i, buff[5];
407
408 /* Check battery temperature */
409 for (i=0; i<5; i++) {
410 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
411 sharpsl_pm.machinfo->measure_temp(1);
412 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
413 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
414 sharpsl_pm.machinfo->measure_temp(0);
415 }
416
417 val = get_select_val(buff);
418
419 dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
420 if (val > sharpsl_pm.machinfo->charge_on_temp) {
421 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
422 return -1;
423 }
424
425 return 0;
426 }
427
428 static int sharpsl_check_battery_voltage(void)
429 {
430 int val, i, buff[5];
431
432 /* disable charge, enable discharge */
433 sharpsl_pm.machinfo->charge(0);
434 sharpsl_pm.machinfo->discharge(1);
435 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
436
437 if (sharpsl_pm.machinfo->discharge1)
438 sharpsl_pm.machinfo->discharge1(1);
439
440 /* Check battery voltage */
441 for (i=0; i<5; i++) {
442 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
443 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
444 }
445
446 if (sharpsl_pm.machinfo->discharge1)
447 sharpsl_pm.machinfo->discharge1(0);
448
449 sharpsl_pm.machinfo->discharge(0);
450
451 val = get_select_val(buff);
452 dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
453
454 if (val < sharpsl_pm.machinfo->charge_on_volt)
455 return -1;
456
457 return 0;
458 }
459
460 static int sharpsl_ac_check(void)
461 {
462 int temp, i, buff[5];
463
464 for (i=0; i<5; i++) {
465 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
466 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
467 }
468
469 temp = get_select_val(buff);
470 dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n",temp);
471
472 if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
473 dev_err(sharpsl_pm.dev, "Error: AC check failed.\n");
474 return -1;
475 }
476
477 return 0;
478 }
479
480 #ifdef CONFIG_PM
481 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
482 {
483 sharpsl_pm.flags |= SHARPSL_SUSPENDED;
484 flush_scheduled_work();
485
486 if (sharpsl_pm.charge_mode == CHRG_ON)
487 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
488 else
489 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
490
491 return 0;
492 }
493
494 static int sharpsl_pm_resume(struct platform_device *pdev)
495 {
496 /* Clear the reset source indicators as they break the bootloader upon reboot */
497 RCSR = 0x0f;
498 sharpsl_average_clear();
499 sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
500 sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
501
502 return 0;
503 }
504
505 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
506 {
507 dev_dbg(sharpsl_pm.dev, "Time is: %08x\n",RCNR);
508
509 dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n",sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
510 /* not charging and AC-IN! */
511
512 if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
513 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
514 sharpsl_pm.charge_mode = CHRG_OFF;
515 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
516 sharpsl_off_charge_battery();
517 }
518
519 sharpsl_pm.machinfo->presuspend();
520
521 PEDR = 0xffffffff; /* clear it */
522
523 sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
524 if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
525 RTSR &= RTSR_ALE;
526 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
527 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n",RTAR);
528 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
529 } else if (alarm_enable) {
530 RTSR &= RTSR_ALE;
531 RTAR = alarm_time;
532 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n",RTAR);
533 } else {
534 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
535 }
536
537 pxa_pm_enter(state);
538
539 sharpsl_pm.machinfo->postsuspend();
540
541 dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n",PEDR);
542 }
543
544 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
545 {
546 if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable) )
547 {
548 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
549 dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
550 corgi_goto_sleep(alarm_time, alarm_enable, state);
551 return 1;
552 }
553 if(sharpsl_off_charge_battery()) {
554 dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
555 corgi_goto_sleep(alarm_time, alarm_enable, state);
556 return 1;
557 }
558 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
559 }
560
561 if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) || (sharpsl_fatal_check() < 0) )
562 {
563 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
564 corgi_goto_sleep(alarm_time, alarm_enable, state);
565 return 1;
566 }
567
568 return 0;
569 }
570
571 static int corgi_pxa_pm_enter(suspend_state_t state)
572 {
573 unsigned long alarm_time = RTAR;
574 unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
575
576 dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
577
578 corgi_goto_sleep(alarm_time, alarm_status, state);
579
580 while (corgi_enter_suspend(alarm_time,alarm_status,state))
581 {}
582
583 if (sharpsl_pm.machinfo->earlyresume)
584 sharpsl_pm.machinfo->earlyresume();
585
586 dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
587
588 return 0;
589 }
590 #endif
591
592
593 /*
594 * Check for fatal battery errors
595 * Fatal returns -1
596 */
597 static int sharpsl_fatal_check(void)
598 {
599 int buff[5], temp, i, acin;
600
601 dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
602
603 /* Check AC-Adapter */
604 acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
605
606 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
607 sharpsl_pm.machinfo->charge(0);
608 udelay(100);
609 sharpsl_pm.machinfo->discharge(1); /* enable discharge */
610 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
611 }
612
613 if (sharpsl_pm.machinfo->discharge1)
614 sharpsl_pm.machinfo->discharge1(1);
615
616 /* Check battery : check inserting battery ? */
617 for (i=0; i<5; i++) {
618 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
619 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
620 }
621
622 if (sharpsl_pm.machinfo->discharge1)
623 sharpsl_pm.machinfo->discharge1(0);
624
625 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
626 udelay(100);
627 sharpsl_pm.machinfo->charge(1);
628 sharpsl_pm.machinfo->discharge(0);
629 }
630
631 temp = get_select_val(buff);
632 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));
633
634 if ((acin && (temp < sharpsl_pm.machinfo->fatal_acin_volt)) ||
635 (!acin && (temp < sharpsl_pm.machinfo->fatal_noacin_volt)))
636 return -1;
637 return 0;
638 }
639
640 static int sharpsl_off_charge_error(void)
641 {
642 dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
643 sharpsl_pm.machinfo->charge(0);
644 sharpsl_pm_led(SHARPSL_LED_ERROR);
645 sharpsl_pm.charge_mode = CHRG_ERROR;
646 return 1;
647 }
648
649 /*
650 * Charging Control while suspended
651 * Return 1 - go straight to sleep
652 * Return 0 - sleep or wakeup depending on other factors
653 */
654 static int sharpsl_off_charge_battery(void)
655 {
656 int time;
657
658 dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
659
660 if (sharpsl_pm.charge_mode == CHRG_OFF) {
661 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
662
663 /* AC Check */
664 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
665 return sharpsl_off_charge_error();
666
667 /* Start Charging */
668 sharpsl_pm_led(SHARPSL_LED_ON);
669 sharpsl_pm.machinfo->charge(0);
670 mdelay(SHARPSL_CHARGE_WAIT_TIME);
671 sharpsl_pm.machinfo->charge(1);
672
673 sharpsl_pm.charge_mode = CHRG_ON;
674 sharpsl_pm.full_count = 0;
675
676 return 1;
677 } else if (sharpsl_pm.charge_mode != CHRG_ON) {
678 return 1;
679 }
680
681 if (sharpsl_pm.full_count == 0) {
682 int time;
683
684 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
685
686 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
687 return sharpsl_off_charge_error();
688
689 sharpsl_pm.machinfo->charge(0);
690 mdelay(SHARPSL_CHARGE_WAIT_TIME);
691 sharpsl_pm.machinfo->charge(1);
692 sharpsl_pm.charge_mode = CHRG_ON;
693
694 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
695
696 time = RCNR;
697 while(1) {
698 /* Check if any wakeup event had occurred */
699 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
700 return 0;
701 /* Check for timeout */
702 if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
703 return 1;
704 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
705 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
706 sharpsl_pm.full_count++;
707 sharpsl_pm.machinfo->charge(0);
708 mdelay(SHARPSL_CHARGE_WAIT_TIME);
709 sharpsl_pm.machinfo->charge(1);
710 return 1;
711 }
712 }
713 }
714
715 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
716
717 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
718
719 time = RCNR;
720 while(1) {
721 /* Check if any wakeup event had occurred */
722 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
723 return 0;
724 /* Check for timeout */
725 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
726 if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
727 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
728 sharpsl_pm.full_count = 0;
729 }
730 sharpsl_pm.full_count++;
731 return 1;
732 }
733 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
734 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
735 sharpsl_pm_led(SHARPSL_LED_OFF);
736 sharpsl_pm.machinfo->charge(0);
737 sharpsl_pm.charge_mode = CHRG_DONE;
738 return 1;
739 }
740 }
741 }
742
743
744 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
745 {
746 return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_percent);
747 }
748
749 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
750 {
751 return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_voltage);
752 }
753
754 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
755 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
756
757 extern void (*apm_get_power_status)(struct apm_power_info *);
758
759 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
760 {
761 info->ac_line_status = sharpsl_pm.battstat.ac_status;
762
763 if (sharpsl_pm.charge_mode == CHRG_ON)
764 info->battery_status = APM_BATTERY_STATUS_CHARGING;
765 else
766 info->battery_status = sharpsl_pm.battstat.mainbat_status;
767
768 info->battery_flag = (1 << info->battery_status);
769 info->battery_life = sharpsl_pm.battstat.mainbat_percent;
770 }
771
772 static struct platform_suspend_ops sharpsl_pm_ops = {
773 .enter = corgi_pxa_pm_enter,
774 .valid = suspend_valid_only_mem,
775 };
776
777 static int __init sharpsl_pm_probe(struct platform_device *pdev)
778 {
779 int ret;
780
781 if (!pdev->dev.platform_data)
782 return -EINVAL;
783
784 sharpsl_pm.dev = &pdev->dev;
785 sharpsl_pm.machinfo = pdev->dev.platform_data;
786 sharpsl_pm.charge_mode = CHRG_OFF;
787 sharpsl_pm.flags = 0;
788
789 init_timer(&sharpsl_pm.ac_timer);
790 sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
791
792 init_timer(&sharpsl_pm.chrg_full_timer);
793 sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
794
795 led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
796
797 sharpsl_pm.machinfo->init();
798
799 ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
800 ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
801 if (ret != 0)
802 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
803
804 apm_get_power_status = sharpsl_apm_get_power_status;
805
806 suspend_set_ops(&sharpsl_pm_ops);
807
808 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
809
810 return 0;
811 }
812
813 static int sharpsl_pm_remove(struct platform_device *pdev)
814 {
815 suspend_set_ops(NULL);
816
817 device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
818 device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
819
820 led_trigger_unregister_simple(sharpsl_charge_led_trigger);
821
822 sharpsl_pm.machinfo->exit();
823
824 del_timer_sync(&sharpsl_pm.chrg_full_timer);
825 del_timer_sync(&sharpsl_pm.ac_timer);
826
827 return 0;
828 }
829
830 static struct platform_driver sharpsl_pm_driver = {
831 .probe = sharpsl_pm_probe,
832 .remove = sharpsl_pm_remove,
833 .suspend = sharpsl_pm_suspend,
834 .resume = sharpsl_pm_resume,
835 .driver = {
836 .name = "sharpsl-pm",
837 },
838 };
839
840 static int __devinit sharpsl_pm_init(void)
841 {
842 return platform_driver_register(&sharpsl_pm_driver);
843 }
844
845 static void sharpsl_pm_exit(void)
846 {
847 platform_driver_unregister(&sharpsl_pm_driver);
848 }
849
850 late_initcall(sharpsl_pm_init);
851 module_exit(sharpsl_pm_exit);
Verdex Pro support