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[PATCH] Fix TIF_POLLING_NRFLAG in ACPI idle routines
[wandboard.git] / arch / arm / mach-pxa / sharpsl_pm.c
blobc10be00fb52671ae7e7dc6fd2e1ccc93cb8ac722
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
26 #include <asm/hardware.h>
27 #include <asm/hardware/scoop.h>
28 #include <asm/mach-types.h>
29 #include <asm/irq.h>
30 #include <asm/apm.h>
31
32 #include <asm/arch/pm.h>
33 #include <asm/arch/pxa-regs.h>
34 #include <asm/arch/sharpsl.h>
35 #include "sharpsl.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 #define SHARPSL_WAIT_CO_TIME 15 /* 15 sec */
45 #define SHARPSL_WAIT_DISCHARGE_ON 100 /* 100 msec */
46 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP 10 /* 10 msec */
47 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT 10 /* 10 msec */
48 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN 10 /* 10 msec */
49 #define SHARPSL_CHARGE_WAIT_TIME 15 /* 15 msec */
50 #define SHARPSL_CHARGE_CO_CHECK_TIME 5 /* 5 msec */
51 #define SHARPSL_CHARGE_RETRY_CNT 1 /* eqv. 10 min */
52
53 #define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */
54 #define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */
55 #define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */
56 #define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */
57 #define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */
58 #define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */
59
60 struct battery_thresh spitz_battery_levels_acin[] = {
61 { 213, 100},
62 { 212, 98},
63 { 211, 95},
64 { 210, 93},
65 { 209, 90},
66 { 208, 88},
67 { 207, 85},
68 { 206, 83},
69 { 205, 80},
70 { 204, 78},
71 { 203, 75},
72 { 202, 73},
73 { 201, 70},
74 { 200, 68},
75 { 199, 65},
76 { 198, 63},
77 { 197, 60},
78 { 196, 58},
79 { 195, 55},
80 { 194, 53},
81 { 193, 50},
82 { 192, 48},
83 { 192, 45},
84 { 191, 43},
85 { 191, 40},
86 { 190, 38},
87 { 190, 35},
88 { 189, 33},
89 { 188, 30},
90 { 187, 28},
91 { 186, 25},
92 { 185, 23},
93 { 184, 20},
94 { 183, 18},
95 { 182, 15},
96 { 181, 13},
97 { 180, 10},
98 { 179, 8},
99 { 178, 5},
100 { 0, 0},
101 };
102
103 struct battery_thresh spitz_battery_levels_noac[] = {
104 { 213, 100},
105 { 212, 98},
106 { 211, 95},
107 { 210, 93},
108 { 209, 90},
109 { 208, 88},
110 { 207, 85},
111 { 206, 83},
112 { 205, 80},
113 { 204, 78},
114 { 203, 75},
115 { 202, 73},
116 { 201, 70},
117 { 200, 68},
118 { 199, 65},
119 { 198, 63},
120 { 197, 60},
121 { 196, 58},
122 { 195, 55},
123 { 194, 53},
124 { 193, 50},
125 { 192, 48},
126 { 191, 45},
127 { 190, 43},
128 { 189, 40},
129 { 188, 38},
130 { 187, 35},
131 { 186, 33},
132 { 185, 30},
133 { 184, 28},
134 { 183, 25},
135 { 182, 23},
136 { 181, 20},
137 { 180, 18},
138 { 179, 15},
139 { 178, 13},
140 { 177, 10},
141 { 176, 8},
142 { 175, 5},
143 { 0, 0},
144 };
145
146 /* MAX1111 Commands */
147 #define MAXCTRL_PD0 1u << 0
148 #define MAXCTRL_PD1 1u << 1
149 #define MAXCTRL_SGL 1u << 2
150 #define MAXCTRL_UNI 1u << 3
151 #define MAXCTRL_SEL_SH 4
152 #define MAXCTRL_STR 1u << 7
153
154 /* MAX1111 Channel Definitions */
155 #define BATT_AD 4u
156 #define BATT_THM 2u
157 #define JK_VAD 6u
158
159
160 /*
161 * Prototypes
162 */
163 static int sharpsl_read_main_battery(void);
164 static int sharpsl_off_charge_battery(void);
165 static int sharpsl_check_battery_temp(void);
166 static int sharpsl_check_battery_voltage(void);
167 static int sharpsl_ac_check(void);
168 static int sharpsl_fatal_check(void);
169 static int sharpsl_average_value(int ad);
170 static void sharpsl_average_clear(void);
171 static void sharpsl_charge_toggle(void *private_);
172 static void sharpsl_battery_thread(void *private_);
173
174
175 /*
176 * Variables
177 */
178 struct sharpsl_pm_status sharpsl_pm;
179 DECLARE_WORK(toggle_charger, sharpsl_charge_toggle, NULL);
180 DECLARE_WORK(sharpsl_bat, sharpsl_battery_thread, NULL);
181
182
183 static int get_percentage(int voltage)
184 {
185 int i = sharpsl_pm.machinfo->bat_levels - 1;
186 struct battery_thresh *thresh;
187
188 if (sharpsl_pm.charge_mode == CHRG_ON)
189 thresh=sharpsl_pm.machinfo->bat_levels_acin;
190 else
191 thresh=sharpsl_pm.machinfo->bat_levels_noac;
192
193 while (i > 0 && (voltage > thresh[i].voltage))
194 i--;
195
196 return thresh[i].percentage;
197 }
198
199 static int get_apm_status(int voltage)
200 {
201 int low_thresh, high_thresh;
202
203 if (sharpsl_pm.charge_mode == CHRG_ON) {
204 high_thresh = sharpsl_pm.machinfo->status_high_acin;
205 low_thresh = sharpsl_pm.machinfo->status_low_acin;
206 } else {
207 high_thresh = sharpsl_pm.machinfo->status_high_noac;
208 low_thresh = sharpsl_pm.machinfo->status_low_noac;
209 }
210
211 if (voltage >= high_thresh)
212 return APM_BATTERY_STATUS_HIGH;
213 if (voltage >= low_thresh)
214 return APM_BATTERY_STATUS_LOW;
215 return APM_BATTERY_STATUS_CRITICAL;
216 }
217
218 void sharpsl_battery_kick(void)
219 {
220 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
221 }
222 EXPORT_SYMBOL(sharpsl_battery_kick);
223
224
225 static void sharpsl_battery_thread(void *private_)
226 {
227 int voltage, percent, apm_status, i = 0;
228
229 if (!sharpsl_pm.machinfo)
230 return;
231
232 sharpsl_pm.battstat.ac_status = (STATUS_AC_IN() ? APM_AC_ONLINE : APM_AC_OFFLINE);
233
234 /* Corgi cannot confirm when battery fully charged so periodically kick! */
235 if (machine_is_corgi() && (sharpsl_pm.charge_mode == CHRG_ON)
236 && time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_ON_TIME_INTERVAL))
237 schedule_work(&toggle_charger);
238
239 while(1) {
240 voltage = sharpsl_read_main_battery();
241 if (voltage > 0) break;
242 if (i++ > 5) {
243 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
244 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
245 break;
246 }
247 }
248
249 voltage = sharpsl_average_value(voltage);
250 apm_status = get_apm_status(voltage);
251 percent = get_percentage(voltage);
252
253 /* At low battery voltages, the voltage has a tendency to start
254 creeping back up so we try to avoid this here */
255 if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE) || (apm_status == APM_BATTERY_STATUS_HIGH) || percent <= sharpsl_pm.battstat.mainbat_percent) {
256 sharpsl_pm.battstat.mainbat_voltage = voltage;
257 sharpsl_pm.battstat.mainbat_status = apm_status;
258 sharpsl_pm.battstat.mainbat_percent = percent;
259 }
260
261 dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %d\n", voltage,
262 sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
263
264 /* If battery is low. limit backlight intensity to save power. */
265 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
266 && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW) ||
267 (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
268 if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
269 corgibl_limit_intensity(1);
270 sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
271 }
272 } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
273 corgibl_limit_intensity(0);
274 sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
275 }
276
277 /* Suspend if critical battery level */
278 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
279 && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
280 && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
281 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
282 dev_err(sharpsl_pm.dev, "Fatal Off\n");
283 apm_queue_event(APM_CRITICAL_SUSPEND);
284 }
285
286 schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
287 }
288
289 static void sharpsl_charge_on(void)
290 {
291 dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
292
293 sharpsl_pm.full_count = 0;
294 sharpsl_pm.charge_mode = CHRG_ON;
295 schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
296 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
297 }
298
299 static void sharpsl_charge_off(void)
300 {
301 dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
302
303 CHARGE_OFF();
304 CHARGE_LED_OFF();
305 sharpsl_pm.charge_mode = CHRG_OFF;
306
307 schedule_work(&sharpsl_bat);
308 }
309
310 static void sharpsl_charge_error(void)
311 {
312 CHARGE_LED_ERR();
313 CHARGE_OFF();
314 sharpsl_pm.charge_mode = CHRG_ERROR;
315 }
316
317 static void sharpsl_charge_toggle(void *private_)
318 {
319 dev_dbg(sharpsl_pm.dev, "Toogling Charger at time: %lx\n", jiffies);
320
321 if (STATUS_AC_IN() == 0) {
322 sharpsl_charge_off();
323 return;
324 } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
325 sharpsl_charge_error();
326 return;
327 }
328
329 CHARGE_LED_ON();
330 CHARGE_OFF();
331 mdelay(SHARPSL_CHARGE_WAIT_TIME);
332 CHARGE_ON();
333
334 sharpsl_pm.charge_start_time = jiffies;
335 }
336
337 static void sharpsl_ac_timer(unsigned long data)
338 {
339 int acin = STATUS_AC_IN();
340
341 dev_dbg(sharpsl_pm.dev, "AC Status: %d\n",acin);
342
343 sharpsl_average_clear();
344 if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
345 sharpsl_charge_on();
346 else if (sharpsl_pm.charge_mode == CHRG_ON)
347 sharpsl_charge_off();
348
349 schedule_work(&sharpsl_bat);
350 }
351
352
353 static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id, struct pt_regs *fp)
354 {
355 /* Delay the event slightly to debounce */
356 /* Must be a smaller delay than the chrg_full_isr below */
357 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
358
359 return IRQ_HANDLED;
360 }
361
362 static void sharpsl_chrg_full_timer(unsigned long data)
363 {
364 dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
365
366 sharpsl_pm.full_count++;
367
368 if (STATUS_AC_IN() == 0) {
369 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
370 if (sharpsl_pm.charge_mode == CHRG_ON)
371 sharpsl_charge_off();
372 } else if (sharpsl_pm.full_count < 2) {
373 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
374 schedule_work(&toggle_charger);
375 } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
376 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
377 schedule_work(&toggle_charger);
378 } else {
379 sharpsl_charge_off();
380 sharpsl_pm.charge_mode = CHRG_DONE;
381 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
382 }
383 }
384
385 /* Charging Finished Interrupt (Not present on Corgi) */
386 /* Can trigger at the same time as an AC staus change so
387 delay until after that has been processed */
388 static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id, struct pt_regs *fp)
389 {
390 if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
391 return IRQ_HANDLED;
392
393 /* delay until after any ac interrupt */
394 mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
395
396 return IRQ_HANDLED;
397 }
398
399 static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id, struct pt_regs *fp)
400 {
401 int is_fatal = 0;
402
403 if (STATUS_BATT_LOCKED() == 0) {
404 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
405 is_fatal = 1;
406 }
407
408 if (sharpsl_pm.machinfo->gpio_fatal && (STATUS_FATAL() == 0)) {
409 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
410 is_fatal = 1;
411 }
412
413 if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
414 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
415 apm_queue_event(APM_CRITICAL_SUSPEND);
416 }
417
418 return IRQ_HANDLED;
419 }
420
421 /*
422 * Maintain an average of the last 10 readings
423 */
424 #define SHARPSL_CNV_VALUE_NUM 10
425 static int sharpsl_ad_index;
426
427 static void sharpsl_average_clear(void)
428 {
429 sharpsl_ad_index = 0;
430 }
431
432 static int sharpsl_average_value(int ad)
433 {
434 int i, ad_val = 0;
435 static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
436
437 if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
438 sharpsl_ad_index = 0;
439 return ad;
440 }
441
442 sharpsl_ad[sharpsl_ad_index] = ad;
443 sharpsl_ad_index++;
444 if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
445 for (i=0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
446 sharpsl_ad[i] = sharpsl_ad[i+1];
447 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
448 }
449 for (i=0; i < sharpsl_ad_index; i++)
450 ad_val += sharpsl_ad[i];
451
452 return (ad_val / sharpsl_ad_index);
453 }
454
455
456 /*
457 * Read MAX1111 ADC
458 */
459 static int read_max1111(int channel)
460 {
461 return corgi_ssp_max1111_get((channel << MAXCTRL_SEL_SH) | MAXCTRL_PD0 | MAXCTRL_PD1
462 | MAXCTRL_SGL | MAXCTRL_UNI | MAXCTRL_STR);
463 }
464
465 static int sharpsl_read_main_battery(void)
466 {
467 return read_max1111(BATT_AD);
468 }
469
470 static int sharpsl_read_temp(void)
471 {
472 int temp;
473
474 sharpsl_pm.machinfo->measure_temp(1);
475
476 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
477 temp = read_max1111(BATT_THM);
478
479 sharpsl_pm.machinfo->measure_temp(0);
480
481 return temp;
482 }
483
484 static int sharpsl_read_acin(void)
485 {
486 return read_max1111(JK_VAD);
487 }
488
489 /*
490 * Take an array of 5 integers, remove the maximum and minimum values
491 * and return the average.
492 */
493 static int get_select_val(int *val)
494 {
495 int i, j, k, temp, sum = 0;
496
497 /* Find MAX val */
498 temp = val[0];
499 j=0;
500 for (i=1; i<5; i++) {
501 if (temp < val[i]) {
502 temp = val[i];
503 j = i;
504 }
505 }
506
507 /* Find MIN val */
508 temp = val[4];
509 k=4;
510 for (i=3; i>=0; i--) {
511 if (temp > val[i]) {
512 temp = val[i];
513 k = i;
514 }
515 }
516
517 for (i=0; i<5; i++)
518 if (i != j && i != k )
519 sum += val[i];
520
521 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]);
522
523 return (sum/3);
524 }
525
526 static int sharpsl_check_battery_temp(void)
527 {
528 int val, i, buff[5];
529
530 /* Check battery temperature */
531 for (i=0; i<5; i++) {
532 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
533 buff[i] = sharpsl_read_temp();
534 }
535
536 val = get_select_val(buff);
537
538 dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
539 if (val > SHARPSL_CHARGE_ON_TEMP)
540 return -1;
541
542 return 0;
543 }
544
545 static int sharpsl_check_battery_voltage(void)
546 {
547 int val, i, buff[5];
548
549 /* disable charge, enable discharge */
550 CHARGE_OFF();
551 DISCHARGE_ON();
552 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
553
554 if (sharpsl_pm.machinfo->discharge1)
555 sharpsl_pm.machinfo->discharge1(1);
556
557 /* Check battery voltage */
558 for (i=0; i<5; i++) {
559 buff[i] = sharpsl_read_main_battery();
560 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
561 }
562
563 if (sharpsl_pm.machinfo->discharge1)
564 sharpsl_pm.machinfo->discharge1(0);
565
566 DISCHARGE_OFF();
567
568 val = get_select_val(buff);
569 dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
570
571 if (val < SHARPSL_CHARGE_ON_VOLT)
572 return -1;
573
574 return 0;
575 }
576
577 static int sharpsl_ac_check(void)
578 {
579 int temp, i, buff[5];
580
581 for (i=0; i<5; i++) {
582 buff[i] = sharpsl_read_acin();
583 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
584 }
585
586 temp = get_select_val(buff);
587 dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n",temp);
588
589 if ((temp > SHARPSL_CHARGE_ON_ACIN_HIGH) || (temp < SHARPSL_CHARGE_ON_ACIN_LOW)) {
590 dev_err(sharpsl_pm.dev, "Error: AC check failed.\n");
591 return -1;
592 }
593
594 return 0;
595 }
596
597 #ifdef CONFIG_PM
598 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
599 {
600 sharpsl_pm.flags |= SHARPSL_SUSPENDED;
601 flush_scheduled_work();
602
603 if (sharpsl_pm.charge_mode == CHRG_ON)
604 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
605 else
606 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
607
608 return 0;
609 }
610
611 static int sharpsl_pm_resume(struct platform_device *pdev)
612 {
613 /* Clear the reset source indicators as they break the bootloader upon reboot */
614 RCSR = 0x0f;
615 sharpsl_average_clear();
616 sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
617 sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
618
619 return 0;
620 }
621
622 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
623 {
624 dev_dbg(sharpsl_pm.dev, "Time is: %08x\n",RCNR);
625
626 dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n",sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
627 /* not charging and AC-IN! */
628
629 if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (STATUS_AC_IN() != 0)) {
630 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
631 sharpsl_pm.charge_mode = CHRG_OFF;
632 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
633 sharpsl_off_charge_battery();
634 }
635
636 sharpsl_pm.machinfo->presuspend();
637
638 PEDR = 0xffffffff; /* clear it */
639
640 sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
641 if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
642 RTSR &= RTSR_ALE;
643 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
644 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n",RTAR);
645 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
646 } else if (alarm_enable) {
647 RTSR &= RTSR_ALE;
648 RTAR = alarm_time;
649 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n",RTAR);
650 } else {
651 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
652 }
653
654 pxa_pm_enter(state);
655
656 sharpsl_pm.machinfo->postsuspend();
657
658 dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n",PEDR);
659 }
660
661 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
662 {
663 if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable) )
664 {
665 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
666 dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
667 corgi_goto_sleep(alarm_time, alarm_enable, state);
668 return 1;
669 }
670 if(sharpsl_off_charge_battery()) {
671 dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
672 corgi_goto_sleep(alarm_time, alarm_enable, state);
673 return 1;
674 }
675 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
676 }
677
678 if ((STATUS_BATT_LOCKED() == 0) || (sharpsl_fatal_check() < 0) )
679 {
680 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
681 corgi_goto_sleep(alarm_time, alarm_enable, state);
682 return 1;
683 }
684
685 return 0;
686 }
687
688 static int corgi_pxa_pm_enter(suspend_state_t state)
689 {
690 unsigned long alarm_time = RTAR;
691 unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
692
693 dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
694
695 corgi_goto_sleep(alarm_time, alarm_status, state);
696
697 while (corgi_enter_suspend(alarm_time,alarm_status,state))
698 {}
699
700 dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
701
702 return 0;
703 }
704 #endif
705
706
707 /*
708 * Check for fatal battery errors
709 * Fatal returns -1
710 */
711 static int sharpsl_fatal_check(void)
712 {
713 int buff[5], temp, i, acin;
714
715 dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
716
717 /* Check AC-Adapter */
718 acin = STATUS_AC_IN();
719
720 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
721 CHARGE_OFF();
722 udelay(100);
723 DISCHARGE_ON(); /* enable discharge */
724 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
725 }
726
727 if (sharpsl_pm.machinfo->discharge1)
728 sharpsl_pm.machinfo->discharge1(1);
729
730 /* Check battery : check inserting battery ? */
731 for (i=0; i<5; i++) {
732 buff[i] = sharpsl_read_main_battery();
733 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
734 }
735
736 if (sharpsl_pm.machinfo->discharge1)
737 sharpsl_pm.machinfo->discharge1(0);
738
739 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
740 udelay(100);
741 CHARGE_ON();
742 DISCHARGE_OFF();
743 }
744
745 temp = get_select_val(buff);
746 dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check: acin: %d, discharge voltage: %d, no discharge: %d\n", acin, temp, sharpsl_read_main_battery());
747
748 if ((acin && (temp < SHARPSL_FATAL_ACIN_VOLT)) ||
749 (!acin && (temp < SHARPSL_FATAL_NOACIN_VOLT)))
750 return -1;
751 return 0;
752 }
753
754 static int sharpsl_off_charge_error(void)
755 {
756 dev_err(sharpsl_pm.dev, "Offline Charger: Error occured.\n");
757 CHARGE_OFF();
758 CHARGE_LED_ERR();
759 sharpsl_pm.charge_mode = CHRG_ERROR;
760 return 1;
761 }
762
763 /*
764 * Charging Control while suspended
765 * Return 1 - go straight to sleep
766 * Return 0 - sleep or wakeup depending on other factors
767 */
768 static int sharpsl_off_charge_battery(void)
769 {
770 int time;
771
772 dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
773
774 if (sharpsl_pm.charge_mode == CHRG_OFF) {
775 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
776
777 /* AC Check */
778 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
779 return sharpsl_off_charge_error();
780
781 /* Start Charging */
782 CHARGE_LED_ON();
783 CHARGE_OFF();
784 mdelay(SHARPSL_CHARGE_WAIT_TIME);
785 CHARGE_ON();
786
787 sharpsl_pm.charge_mode = CHRG_ON;
788 sharpsl_pm.full_count = 0;
789
790 return 1;
791 } else if (sharpsl_pm.charge_mode != CHRG_ON) {
792 return 1;
793 }
794
795 if (sharpsl_pm.full_count == 0) {
796 int time;
797
798 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
799
800 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
801 return sharpsl_off_charge_error();
802
803 CHARGE_OFF();
804 mdelay(SHARPSL_CHARGE_WAIT_TIME);
805 CHARGE_ON();
806 sharpsl_pm.charge_mode = CHRG_ON;
807
808 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
809
810 time = RCNR;
811 while(1) {
812 /* Check if any wakeup event had occured */
813 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
814 return 0;
815 /* Check for timeout */
816 if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
817 return 1;
818 if (STATUS_CHRG_FULL()) {
819 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occured. Retrying to check\n");
820 sharpsl_pm.full_count++;
821 CHARGE_OFF();
822 mdelay(SHARPSL_CHARGE_WAIT_TIME);
823 CHARGE_ON();
824 return 1;
825 }
826 }
827 }
828
829 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
830
831 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
832
833 time = RCNR;
834 while(1) {
835 /* Check if any wakeup event had occured */
836 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
837 return 0;
838 /* Check for timeout */
839 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
840 if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
841 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
842 sharpsl_pm.full_count = 0;
843 }
844 sharpsl_pm.full_count++;
845 return 1;
846 }
847 if (STATUS_CHRG_FULL()) {
848 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
849 CHARGE_LED_OFF();
850 CHARGE_OFF();
851 sharpsl_pm.charge_mode = CHRG_DONE;
852 return 1;
853 }
854 }
855 }
856
857
858 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
859 {
860 return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_percent);
861 }
862
863 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
864 {
865 return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_voltage);
866 }
867
868 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
869 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
870
871 extern void (*apm_get_power_status)(struct apm_power_info *);
872
873 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
874 {
875 info->ac_line_status = sharpsl_pm.battstat.ac_status;
876
877 if (sharpsl_pm.charge_mode == CHRG_ON)
878 info->battery_status = APM_BATTERY_STATUS_CHARGING;
879 else
880 info->battery_status = sharpsl_pm.battstat.mainbat_status;
881
882 info->battery_flag = (1 << info->battery_status);
883 info->battery_life = sharpsl_pm.battstat.mainbat_percent;
884 }
885
886 static struct pm_ops sharpsl_pm_ops = {
887 .pm_disk_mode = PM_DISK_FIRMWARE,
888 .prepare = pxa_pm_prepare,
889 .enter = corgi_pxa_pm_enter,
890 .finish = pxa_pm_finish,
891 };
892
893 static int __init sharpsl_pm_probe(struct platform_device *pdev)
894 {
895 if (!pdev->dev.platform_data)
896 return -EINVAL;
897
898 sharpsl_pm.dev = &pdev->dev;
899 sharpsl_pm.machinfo = pdev->dev.platform_data;
900 sharpsl_pm.charge_mode = CHRG_OFF;
901 sharpsl_pm.flags = 0;
902
903 sharpsl_pm.machinfo->init();
904
905 init_timer(&sharpsl_pm.ac_timer);
906 sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
907
908 init_timer(&sharpsl_pm.chrg_full_timer);
909 sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
910
911 pxa_gpio_mode(sharpsl_pm.machinfo->gpio_acin | GPIO_IN);
912 pxa_gpio_mode(sharpsl_pm.machinfo->gpio_batfull | GPIO_IN);
913 pxa_gpio_mode(sharpsl_pm.machinfo->gpio_batlock | GPIO_IN);
914
915 /* Register interrupt handlers */
916 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr, SA_INTERRUPT, "AC Input Detect", sharpsl_ac_isr)) {
917 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin));
918 }
919 else set_irq_type(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin),IRQT_BOTHEDGE);
920
921 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr, SA_INTERRUPT, "Battery Cover", sharpsl_fatal_isr)) {
922 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock));
923 }
924 else set_irq_type(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock),IRQT_FALLING);
925
926 if (sharpsl_pm.machinfo->gpio_fatal) {
927 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr, SA_INTERRUPT, "Fatal Battery", sharpsl_fatal_isr)) {
928 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal));
929 }
930 else set_irq_type(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal),IRQT_FALLING);
931 }
932
933 if (!machine_is_corgi())
934 {
935 /* Register interrupt handler. */
936 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr, SA_INTERRUPT, "CO", sharpsl_chrg_full_isr)) {
937 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull));
938 }
939 else set_irq_type(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull),IRQT_RISING);
940 }
941
942 device_create_file(&pdev->dev, &dev_attr_battery_percentage);
943 device_create_file(&pdev->dev, &dev_attr_battery_voltage);
944
945 apm_get_power_status = sharpsl_apm_get_power_status;
946
947 pm_set_ops(&sharpsl_pm_ops);
948
949 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
950
951 return 0;
952 }
953
954 static int sharpsl_pm_remove(struct platform_device *pdev)
955 {
956 pm_set_ops(NULL);
957
958 device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
959 device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
960
961 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
962 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
963
964 if (sharpsl_pm.machinfo->gpio_fatal)
965 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
966
967 if (!machine_is_corgi())
968 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
969
970 del_timer_sync(&sharpsl_pm.chrg_full_timer);
971 del_timer_sync(&sharpsl_pm.ac_timer);
972
973 return 0;
974 }
975
976 static struct platform_driver sharpsl_pm_driver = {
977 .probe = sharpsl_pm_probe,
978 .remove = sharpsl_pm_remove,
979 .suspend = sharpsl_pm_suspend,
980 .resume = sharpsl_pm_resume,
981 .driver = {
982 .name = "sharpsl-pm",
983 },
984 };
985
986 static int __devinit sharpsl_pm_init(void)
987 {
988 return platform_driver_register(&sharpsl_pm_driver);
989 }
990
991 static void sharpsl_pm_exit(void)
992 {
993 platform_driver_unregister(&sharpsl_pm_driver);
994 }
995
996 late_initcall(sharpsl_pm_init);
997 module_exit(sharpsl_pm_exit);
WandBoard kernel