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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/nico/orion...
[deliverable/linux.git] / arch / arm / mach-pxa / sharpsl_pm.c
CommitLineData
078abcf9
RP		 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>
078abcf9 18#include <linux/kernel.h>
078abcf9 19#include <linux/interrupt.h>
c5e1ae97 20#include <linux/platform_device.h>
61fde514 21#include <linux/apm-emulation.h>
78731d33 22#include <linux/timer.h>
78731d33
DES		 23#include <linux/delay.h>
24#include <linux/leds.h>
25#include <linux/suspend.h>
d5af2778 26#include <linux/gpio.h>
078abcf9 27
078abcf9 28#include <asm/mach-types.h>
a09e64fb 29#include <mach/pm.h>
78731d33 30#include <mach/pxa2xx-regs.h>
78731d33 31#include <mach/regs-rtc.h>
a09e64fb 32#include <mach/sharpsl.h>
78731d33
DES		 33#include <mach/sharpsl_pm.h>
34
d48898a3
DES		 35#include "sharpsl.h"
36
78731d33
DES		 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#ifdef CONFIG_PM
58static int sharpsl_off_charge_battery(void);
59static int sharpsl_check_battery_voltage(void);
60static int sharpsl_fatal_check(void);
61#endif
62static int sharpsl_check_battery_temp(void);
63static int sharpsl_ac_check(void);
64static int sharpsl_average_value(int ad);
65static void sharpsl_average_clear(void);
66static void sharpsl_charge_toggle(struct work_struct *private_);
67static void sharpsl_battery_thread(struct work_struct *private_);
68
69
70/*
71 * Variables
72 */
73struct sharpsl_pm_status sharpsl_pm;
d48898a3
DES		 74static DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
75static DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
78731d33
DES		 76DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
77
78
078abcf9 79
0ba01ebc 80struct battery_thresh sharpsl_battery_levels_acin[] = {
078abcf9
RP		 81 { 213, 100},
82 { 212, 98},
83 { 211, 95},
84 { 210, 93},
85 { 209, 90},
86 { 208, 88},
87 { 207, 85},
88 { 206, 83},
89 { 205, 80},
90 { 204, 78},
91 { 203, 75},
92 { 202, 73},
93 { 201, 70},
94 { 200, 68},
95 { 199, 65},
96 { 198, 63},
97 { 197, 60},
98 { 196, 58},
99 { 195, 55},
100 { 194, 53},
101 { 193, 50},
102 { 192, 48},
103 { 192, 45},
104 { 191, 43},
105 { 191, 40},
106 { 190, 38},
107 { 190, 35},
108 { 189, 33},
109 { 188, 30},
110 { 187, 28},
111 { 186, 25},
112 { 185, 23},
113 { 184, 20},
114 { 183, 18},
115 { 182, 15},
116 { 181, 13},
117 { 180, 10},
118 { 179, 8},
119 { 178, 5},
120 { 0, 0},
121};
122
0ba01ebc 123struct battery_thresh sharpsl_battery_levels_noac[] = {
078abcf9
RP		 124 { 213, 100},
125 { 212, 98},
126 { 211, 95},
127 { 210, 93},
128 { 209, 90},
129 { 208, 88},
130 { 207, 85},
131 { 206, 83},
132 { 205, 80},
133 { 204, 78},
134 { 203, 75},
135 { 202, 73},
136 { 201, 70},
137 { 200, 68},
138 { 199, 65},
139 { 198, 63},
140 { 197, 60},
141 { 196, 58},
142 { 195, 55},
143 { 194, 53},
144 { 193, 50},
145 { 192, 48},
146 { 191, 45},
147 { 190, 43},
148 { 189, 40},
149 { 188, 38},
150 { 187, 35},
151 { 186, 33},
152 { 185, 30},
153 { 184, 28},
154 { 183, 25},
155 { 182, 23},
156 { 181, 20},
157 { 180, 18},
158 { 179, 15},
159 { 178, 13},
160 { 177, 10},
161 { 176, 8},
162 { 175, 5},
163 { 0, 0},
164};
165
25af3b0f 166/* MAX1111 Commands */
b64b0b76
PM		 167#define MAXCTRL_PD0 (1u << 0)
168#define MAXCTRL_PD1 (1u << 1)
169#define MAXCTRL_SGL (1u << 2)
170#define MAXCTRL_UNI (1u << 3)
25af3b0f 171#define MAXCTRL_SEL_SH 4
b64b0b76 172#define MAXCTRL_STR (1u << 7)
25af3b0f 173
078abcf9
RP		 174/*
175 * Read MAX1111 ADC
176 */
b7557de4 177int sharpsl_pm_pxa_read_max1111(int channel)
078abcf9 178{
b64b0b76
PM		 179 /* Ugly, better move this function into another module */
180 if (machine_is_tosa())
f8703dc8
RP		 181 return 0;
182
45e2a9b4
EM		 183#ifdef CONFIG_CORGI_SSP_DEPRECATED
184 return corgi_ssp_max1111_get((channel << MAXCTRL_SEL_SH) | MAXCTRL_PD0 | MAXCTRL_PD1
185 | MAXCTRL_SGL | MAXCTRL_UNI | MAXCTRL_STR);
186#else
25af3b0f
EM		 187 extern int max1111_read_channel(int);
188
f16177c2
EM		 189 /* max1111 accepts channels from 0-3, however,
190 * it is encoded from 0-7 here in the code.
191 */
192 return max1111_read_channel(channel >> 1);
25af3b0f 193#endif
078abcf9
RP		 194}
195
78731d33
DES		 196static int get_percentage(int voltage)
197{
198 int i = sharpsl_pm.machinfo->bat_levels - 1;
199 int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
200 struct battery_thresh *thresh;
201
202 if (sharpsl_pm.charge_mode == CHRG_ON)
203 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
204 else
205 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
206
207 while (i > 0 && (voltage > thresh[i].voltage))
208 i--;
209
210 return thresh[i].percentage;
211}
212
213static int get_apm_status(int voltage)
214{
215 int low_thresh, high_thresh;
216
217 if (sharpsl_pm.charge_mode == CHRG_ON) {
218 high_thresh = sharpsl_pm.machinfo->status_high_acin;
219 low_thresh = sharpsl_pm.machinfo->status_low_acin;
220 } else {
221 high_thresh = sharpsl_pm.machinfo->status_high_noac;
222 low_thresh = sharpsl_pm.machinfo->status_low_noac;
223 }
224
225 if (voltage >= high_thresh)
226 return APM_BATTERY_STATUS_HIGH;
227 if (voltage >= low_thresh)
228 return APM_BATTERY_STATUS_LOW;
229 return APM_BATTERY_STATUS_CRITICAL;
230}
231
232void sharpsl_battery_kick(void)
233{
234 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
235}
236EXPORT_SYMBOL(sharpsl_battery_kick);
237
238
239static void sharpsl_battery_thread(struct work_struct *private_)
240{
b64b0b76 241 int voltage, percent, apm_status, i;
78731d33
DES		 242
243 if (!sharpsl_pm.machinfo)
244 return;
245
246 sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
247
248 /* Corgi cannot confirm when battery fully charged so periodically kick! */
249 if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
250 && time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_ON_TIME_INTERVAL))
251 schedule_delayed_work(&toggle_charger, 0);
252
b64b0b76 253 for (i = 0; i < 5; i++) {
78731d33 254 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
b64b0b76 255 if (voltage > 0)
78731d33 256 break;
b64b0b76
PM		 257 }
258 if (voltage <= 0) {
259 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
260 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
78731d33
DES		 261 }
262
263 voltage = sharpsl_average_value(voltage);
264 apm_status = get_apm_status(voltage);
265 percent = get_percentage(voltage);
266
267 /* At low battery voltages, the voltage has a tendency to start
b64b0b76
PM		 268 creeping back up so we try to avoid this here */
269 if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE)
270 || (apm_status == APM_BATTERY_STATUS_HIGH)
271 || percent <= sharpsl_pm.battstat.mainbat_percent) {
78731d33
DES		 272 sharpsl_pm.battstat.mainbat_voltage = voltage;
273 sharpsl_pm.battstat.mainbat_status = apm_status;
274 sharpsl_pm.battstat.mainbat_percent = percent;
275 }
276
277 dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
278 sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
279
280#ifdef CONFIG_BACKLIGHT_CORGI
281 /* If battery is low. limit backlight intensity to save power. */
282 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
b64b0b76
PM		 283 && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW)
284 || (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
78731d33
DES		 285 if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
286 sharpsl_pm.machinfo->backlight_limit(1);
287 sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
288 }
289 } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
290 sharpsl_pm.machinfo->backlight_limit(0);
291 sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
292 }
293#endif
294
295 /* Suspend if critical battery level */
296 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
b64b0b76
PM		 297 && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
298 && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
78731d33
DES		 299 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
300 dev_err(sharpsl_pm.dev, "Fatal Off\n");
301 apm_queue_event(APM_CRITICAL_SUSPEND);
302 }
303
304 schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
305}
306
307void sharpsl_pm_led(int val)
308{
309 if (val == SHARPSL_LED_ERROR) {
310 dev_err(sharpsl_pm.dev, "Charging Error!\n");
311 } else if (val == SHARPSL_LED_ON) {
312 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
313 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
314 } else {
315 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
316 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
317 }
318}
319
320static void sharpsl_charge_on(void)
321{
322 dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
323
324 sharpsl_pm.full_count = 0;
325 sharpsl_pm.charge_mode = CHRG_ON;
326 schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
327 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
328}
329
330static void sharpsl_charge_off(void)
331{
332 dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
333
334 sharpsl_pm.machinfo->charge(0);
335 sharpsl_pm_led(SHARPSL_LED_OFF);
336 sharpsl_pm.charge_mode = CHRG_OFF;
337
338 schedule_delayed_work(&sharpsl_bat, 0);
339}
340
341static void sharpsl_charge_error(void)
342{
343 sharpsl_pm_led(SHARPSL_LED_ERROR);
344 sharpsl_pm.machinfo->charge(0);
345 sharpsl_pm.charge_mode = CHRG_ERROR;
346}
347
348static void sharpsl_charge_toggle(struct work_struct *private_)
349{
b64b0b76 350 dev_dbg(sharpsl_pm.dev, "Toggling Charger at time: %lx\n", jiffies);
78731d33
DES		 351
352 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
353 sharpsl_charge_off();
354 return;
355 } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
356 sharpsl_charge_error();
357 return;
358 }
359
360 sharpsl_pm_led(SHARPSL_LED_ON);
361 sharpsl_pm.machinfo->charge(0);
362 mdelay(SHARPSL_CHARGE_WAIT_TIME);
363 sharpsl_pm.machinfo->charge(1);
364
365 sharpsl_pm.charge_start_time = jiffies;
366}
367
368static void sharpsl_ac_timer(unsigned long data)
369{
370 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
371
b64b0b76 372 dev_dbg(sharpsl_pm.dev, "AC Status: %d\n", acin);
78731d33
DES		 373
374 sharpsl_average_clear();
375 if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
376 sharpsl_charge_on();
377 else if (sharpsl_pm.charge_mode == CHRG_ON)
378 sharpsl_charge_off();
379
380 schedule_delayed_work(&sharpsl_bat, 0);
381}
382
383
d48898a3 384static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
78731d33
DES		 385{
386 /* Delay the event slightly to debounce */
387 /* Must be a smaller delay than the chrg_full_isr below */
388 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
389
390 return IRQ_HANDLED;
391}
392
393static void sharpsl_chrg_full_timer(unsigned long data)
394{
395 dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
396
397 sharpsl_pm.full_count++;
398
399 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
400 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
401 if (sharpsl_pm.charge_mode == CHRG_ON)
402 sharpsl_charge_off();
403 } else if (sharpsl_pm.full_count < 2) {
404 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
405 schedule_delayed_work(&toggle_charger, 0);
406 } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
407 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
408 schedule_delayed_work(&toggle_charger, 0);
409 } else {
410 sharpsl_charge_off();
411 sharpsl_pm.charge_mode = CHRG_DONE;
412 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
413 }
414}
415
416/* Charging Finished Interrupt (Not present on Corgi) */
417/* Can trigger at the same time as an AC status change so
418 delay until after that has been processed */
d48898a3 419static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
78731d33
DES		 420{
421 if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
422 return IRQ_HANDLED;
423
424 /* delay until after any ac interrupt */
425 mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
426
427 return IRQ_HANDLED;
428}
429
d48898a3 430static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
78731d33
DES		 431{
432 int is_fatal = 0;
433
434 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
435 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
436 is_fatal = 1;
437 }
438
439 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
440 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
441 is_fatal = 1;
442 }
443
444 if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
445 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
446 apm_queue_event(APM_CRITICAL_SUSPEND);
447 }
448
449 return IRQ_HANDLED;
450}
451
452/*
453 * Maintain an average of the last 10 readings
454 */
455#define SHARPSL_CNV_VALUE_NUM 10
456static int sharpsl_ad_index;
457
458static void sharpsl_average_clear(void)
459{
460 sharpsl_ad_index = 0;
461}
462
463static int sharpsl_average_value(int ad)
464{
465 int i, ad_val = 0;
466 static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
467
468 if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
469 sharpsl_ad_index = 0;
470 return ad;
471 }
472
473 sharpsl_ad[sharpsl_ad_index] = ad;
474 sharpsl_ad_index++;
475 if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
b64b0b76 476 for (i = 0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
78731d33
DES		 477 sharpsl_ad[i] = sharpsl_ad[i+1];
478 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
479 }
b64b0b76 480 for (i = 0; i < sharpsl_ad_index; i++)
78731d33
DES		 481 ad_val += sharpsl_ad[i];
482
b64b0b76 483 return ad_val / sharpsl_ad_index;
78731d33
DES		 484}
485
486/*
487 * Take an array of 5 integers, remove the maximum and minimum values
488 * and return the average.
489 */
490static int get_select_val(int *val)
491{
492 int i, j, k, temp, sum = 0;
493
494 /* Find MAX val */
495 temp = val[0];
b64b0b76
PM		 496 j = 0;
497 for (i = 1; i < 5; i++) {
78731d33
DES		 498 if (temp < val[i]) {
499 temp = val[i];
500 j = i;
501 }
502 }
503
504 /* Find MIN val */
505 temp = val[4];
b64b0b76
PM		 506 k = 4;
507 for (i = 3; i >= 0; i--) {
78731d33
DES		 508 if (temp > val[i]) {
509 temp = val[i];
510 k = i;
511 }
512 }
513
b64b0b76
PM		 514 for (i = 0; i < 5; i++)
515 if (i != j && i != k)
78731d33
DES		 516 sum += val[i];
517
518 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]);
519
b64b0b76 520 return sum/3;
78731d33
DES		 521}
522
523static int sharpsl_check_battery_temp(void)
524{
525 int val, i, buff[5];
526
527 /* Check battery temperature */
b64b0b76 528 for (i = 0; i < 5; i++) {
78731d33
DES		 529 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
530 sharpsl_pm.machinfo->measure_temp(1);
531 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
532 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
533 sharpsl_pm.machinfo->measure_temp(0);
534 }
535
536 val = get_select_val(buff);
537
538 dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
539 if (val > sharpsl_pm.machinfo->charge_on_temp) {
540 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
541 return -1;
542 }
543
544 return 0;
545}
546
547#ifdef CONFIG_PM
548static int sharpsl_check_battery_voltage(void)
549{
550 int val, i, buff[5];
551
552 /* disable charge, enable discharge */
553 sharpsl_pm.machinfo->charge(0);
554 sharpsl_pm.machinfo->discharge(1);
555 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
556
557 if (sharpsl_pm.machinfo->discharge1)
558 sharpsl_pm.machinfo->discharge1(1);
559
560 /* Check battery voltage */
b64b0b76 561 for (i = 0; i < 5; i++) {
78731d33
DES		 562 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
563 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
564 }
565
566 if (sharpsl_pm.machinfo->discharge1)
567 sharpsl_pm.machinfo->discharge1(0);
568
569 sharpsl_pm.machinfo->discharge(0);
570
571 val = get_select_val(buff);
572 dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
573
574 if (val < sharpsl_pm.machinfo->charge_on_volt)
575 return -1;
576
577 return 0;
578}
579#endif
580
581static int sharpsl_ac_check(void)
582{
583 int temp, i, buff[5];
584
b64b0b76 585 for (i = 0; i < 5; i++) {
78731d33
DES		 586 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
587 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
588 }
589
590 temp = get_select_val(buff);
b64b0b76 591 dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n", temp);
78731d33
DES		 592
593 if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
b64b0b76 594 dev_err(sharpsl_pm.dev, "Error: AC check failed: voltage %d.\n", temp);
78731d33
DES		 595 return -1;
596 }
597
598 return 0;
599}
600
601#ifdef CONFIG_PM
602static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
603{
604 sharpsl_pm.flags |= SHARPSL_SUSPENDED;
605 flush_scheduled_work();
606
607 if (sharpsl_pm.charge_mode == CHRG_ON)
608 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
609 else
610 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
611
612 return 0;
613}
614
615static int sharpsl_pm_resume(struct platform_device *pdev)
616{
617 /* Clear the reset source indicators as they break the bootloader upon reboot */
618 RCSR = 0x0f;
619 sharpsl_average_clear();
620 sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
621 sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
622
623 return 0;
624}
625
626static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
627{
b64b0b76 628 dev_dbg(sharpsl_pm.dev, "Time is: %08x\n", RCNR);
78731d33 629
b64b0b76 630 dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n", sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
78731d33
DES		 631 /* not charging and AC-IN! */
632
633 if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
634 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
635 sharpsl_pm.charge_mode = CHRG_OFF;
636 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
637 sharpsl_off_charge_battery();
638 }
639
640 sharpsl_pm.machinfo->presuspend();
641
642 PEDR = 0xffffffff; /* clear it */
643
644 sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
645 if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
646 RTSR &= RTSR_ALE;
647 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
b64b0b76 648 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n", RTAR);
78731d33
DES		 649 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
650 } else if (alarm_enable) {
651 RTSR &= RTSR_ALE;
652 RTAR = alarm_time;
b64b0b76 653 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n", RTAR);
78731d33
DES		 654 } else {
655 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
656 }
657
658 pxa_pm_enter(state);
659
660 sharpsl_pm.machinfo->postsuspend();
661
b64b0b76 662 dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n", PEDR);
78731d33
DES		 663}
664
665static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
666{
b64b0b76 667 if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable)) {
78731d33
DES		 668 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
669 dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
670 corgi_goto_sleep(alarm_time, alarm_enable, state);
671 return 1;
672 }
b64b0b76 673 if (sharpsl_off_charge_battery()) {
78731d33
DES		 674 dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
675 corgi_goto_sleep(alarm_time, alarm_enable, state);
676 return 1;
677 }
678 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
679 }
680
99f329a2
PM		 681 if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) ||
682 (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL))) {
78731d33
DES		 683 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
684 corgi_goto_sleep(alarm_time, alarm_enable, state);
685 return 1;
686 }
687
688 return 0;
689}
690
691static int corgi_pxa_pm_enter(suspend_state_t state)
692{
693 unsigned long alarm_time = RTAR;
694 unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
695
696 dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
697
698 corgi_goto_sleep(alarm_time, alarm_status, state);
699
b64b0b76 700 while (corgi_enter_suspend(alarm_time, alarm_status, state))
78731d33
DES		 701 {}
702
703 if (sharpsl_pm.machinfo->earlyresume)
704 sharpsl_pm.machinfo->earlyresume();
705
706 dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
707
708 return 0;
709}
710
711/*
712 * Check for fatal battery errors
713 * Fatal returns -1
714 */
715static int sharpsl_fatal_check(void)
716{
717 int buff[5], temp, i, acin;
718
719 dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
720
721 /* Check AC-Adapter */
722 acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
723
724 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
725 sharpsl_pm.machinfo->charge(0);
726 udelay(100);
727 sharpsl_pm.machinfo->discharge(1); /* enable discharge */
728 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
729 }
730
731 if (sharpsl_pm.machinfo->discharge1)
732 sharpsl_pm.machinfo->discharge1(1);
733
734 /* Check battery : check inserting battery ? */
b64b0b76 735 for (i = 0; i < 5; i++) {
78731d33
DES		 736 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
737 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
738 }
739
740 if (sharpsl_pm.machinfo->discharge1)
741 sharpsl_pm.machinfo->discharge1(0);
742
743 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
744 udelay(100);
745 sharpsl_pm.machinfo->charge(1);
746 sharpsl_pm.machinfo->discharge(0);
747 }
748
749 temp = get_select_val(buff);
750 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));
751
752 if ((acin && (temp < sharpsl_pm.machinfo->fatal_acin_volt)) ||
753 (!acin && (temp < sharpsl_pm.machinfo->fatal_noacin_volt)))
754 return -1;
755 return 0;
756}
757
758static int sharpsl_off_charge_error(void)
759{
760 dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
761 sharpsl_pm.machinfo->charge(0);
762 sharpsl_pm_led(SHARPSL_LED_ERROR);
763 sharpsl_pm.charge_mode = CHRG_ERROR;
764 return 1;
765}
766
767/*
768 * Charging Control while suspended
769 * Return 1 - go straight to sleep
770 * Return 0 - sleep or wakeup depending on other factors
771 */
772static int sharpsl_off_charge_battery(void)
773{
774 int time;
775
776 dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
777
778 if (sharpsl_pm.charge_mode == CHRG_OFF) {
779 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
780
781 /* AC Check */
782 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
783 return sharpsl_off_charge_error();
784
785 /* Start Charging */
786 sharpsl_pm_led(SHARPSL_LED_ON);
787 sharpsl_pm.machinfo->charge(0);
788 mdelay(SHARPSL_CHARGE_WAIT_TIME);
789 sharpsl_pm.machinfo->charge(1);
790
791 sharpsl_pm.charge_mode = CHRG_ON;
792 sharpsl_pm.full_count = 0;
793
794 return 1;
795 } else if (sharpsl_pm.charge_mode != CHRG_ON) {
796 return 1;
797 }
798
799 if (sharpsl_pm.full_count == 0) {
800 int time;
801
802 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
803
804 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
805 return sharpsl_off_charge_error();
806
807 sharpsl_pm.machinfo->charge(0);
808 mdelay(SHARPSL_CHARGE_WAIT_TIME);
809 sharpsl_pm.machinfo->charge(1);
810 sharpsl_pm.charge_mode = CHRG_ON;
811
812 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
813
814 time = RCNR;
b64b0b76 815 while (1) {
78731d33
DES		 816 /* Check if any wakeup event had occurred */
817 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
818 return 0;
819 /* Check for timeout */
820 if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
821 return 1;
822 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
823 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
824 sharpsl_pm.full_count++;
825 sharpsl_pm.machinfo->charge(0);
826 mdelay(SHARPSL_CHARGE_WAIT_TIME);
827 sharpsl_pm.machinfo->charge(1);
828 return 1;
829 }
830 }
831 }
832
833 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
834
835 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
836
837 time = RCNR;
b64b0b76 838 while (1) {
78731d33 839 /* Check if any wakeup event had occurred */
b64b0b76 840 if (sharpsl_pm.machinfo->charger_wakeup())
78731d33
DES		 841 return 0;
842 /* Check for timeout */
843 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
844 if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
845 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
846 sharpsl_pm.full_count = 0;
847 }
848 sharpsl_pm.full_count++;
849 return 1;
850 }
851 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
852 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
853 sharpsl_pm_led(SHARPSL_LED_OFF);
854 sharpsl_pm.machinfo->charge(0);
855 sharpsl_pm.charge_mode = CHRG_DONE;
856 return 1;
857 }
858 }
859}
860#else
861#define sharpsl_pm_suspend NULL
862#define sharpsl_pm_resume NULL
863#endif
864
865static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
866{
b64b0b76 867 return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_percent);
78731d33
DES		 868}
869
870static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
871{
b64b0b76 872 return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_voltage);
78731d33
DES		 873}
874
875static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
876static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
877
878extern void (*apm_get_power_status)(struct apm_power_info *);
879
880static void sharpsl_apm_get_power_status(struct apm_power_info *info)
881{
882 info->ac_line_status = sharpsl_pm.battstat.ac_status;
883
884 if (sharpsl_pm.charge_mode == CHRG_ON)
885 info->battery_status = APM_BATTERY_STATUS_CHARGING;
886 else
887 info->battery_status = sharpsl_pm.battstat.mainbat_status;
888
889 info->battery_flag = (1 << info->battery_status);
890 info->battery_life = sharpsl_pm.battstat.mainbat_percent;
891}
892
893#ifdef CONFIG_PM
894static struct platform_suspend_ops sharpsl_pm_ops = {
51cdd928
PM		 895 .prepare = pxa_pm_prepare,
896 .finish = pxa_pm_finish,
78731d33
DES		 897 .enter = corgi_pxa_pm_enter,
898 .valid = suspend_valid_only_mem,
899};
900#endif
901
91a99dfc 902static int __devinit sharpsl_pm_probe(struct platform_device *pdev)
78731d33
DES		 903{
904 int ret;
905
906 if (!pdev->dev.platform_data)
907 return -EINVAL;
908
909 sharpsl_pm.dev = &pdev->dev;
910 sharpsl_pm.machinfo = pdev->dev.platform_data;
911 sharpsl_pm.charge_mode = CHRG_OFF;
912 sharpsl_pm.flags = 0;
913
914 init_timer(&sharpsl_pm.ac_timer);
915 sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
916
917 init_timer(&sharpsl_pm.chrg_full_timer);
918 sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
919
920 led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
921
922 sharpsl_pm.machinfo->init();
923
d5af2778
DES		 924 gpio_request(sharpsl_pm.machinfo->gpio_acin, "AC IN");
925 gpio_direction_input(sharpsl_pm.machinfo->gpio_acin);
926 gpio_request(sharpsl_pm.machinfo->gpio_batfull, "Battery Full");
927 gpio_direction_input(sharpsl_pm.machinfo->gpio_batfull);
928 gpio_request(sharpsl_pm.machinfo->gpio_batlock, "Battery Lock");
929 gpio_direction_input(sharpsl_pm.machinfo->gpio_batlock);
d48898a3
DES		 930
931 /* Register interrupt handlers */
54525372 932 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr, IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "AC Input Detect", sharpsl_ac_isr)) {
d48898a3
DES		 933 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin));
934 }
d48898a3 935
54525372 936 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) {
d48898a3
DES		 937 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock));
938 }
d48898a3
DES		 939
940 if (sharpsl_pm.machinfo->gpio_fatal) {
54525372 941 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) {
d48898a3
DES		 942 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal));
943 }
d48898a3
DES		 944 }
945
b64b0b76 946 if (sharpsl_pm.machinfo->batfull_irq) {
d48898a3 947 /* Register interrupt handler. */
54525372 948 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr, IRQF_DISABLED | IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) {
d48898a3
DES		 949 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull));
950 }
d48898a3
DES		 951 }
952
78731d33
DES		 953 ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
954 ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
955 if (ret != 0)
956 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
957
958 apm_get_power_status = sharpsl_apm_get_power_status;
959
960#ifdef CONFIG_PM
961 suspend_set_ops(&sharpsl_pm_ops);
962#endif
963
964 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
965
966 return 0;
967}
968
969static int sharpsl_pm_remove(struct platform_device *pdev)
970{
971 suspend_set_ops(NULL);
972
973 device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
974 device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
975
976 led_trigger_unregister_simple(sharpsl_charge_led_trigger);
977
d48898a3
DES		 978 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
979 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
980
981 if (sharpsl_pm.machinfo->gpio_fatal)
982 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
983
984 if (sharpsl_pm.machinfo->batfull_irq)
985 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
986
d5af2778
DES		 987 gpio_free(sharpsl_pm.machinfo->gpio_batlock);
988 gpio_free(sharpsl_pm.machinfo->gpio_batfull);
989 gpio_free(sharpsl_pm.machinfo->gpio_acin);
990
d48898a3
DES		 991 if (sharpsl_pm.machinfo->exit)
992 sharpsl_pm.machinfo->exit();
78731d33
DES		 993
994 del_timer_sync(&sharpsl_pm.chrg_full_timer);
995 del_timer_sync(&sharpsl_pm.ac_timer);
996
997 return 0;
998}
999
1000static struct platform_driver sharpsl_pm_driver = {
1001 .probe = sharpsl_pm_probe,
1002 .remove = sharpsl_pm_remove,
1003 .suspend = sharpsl_pm_suspend,
1004 .resume = sharpsl_pm_resume,
1005 .driver = {
1006 .name = "sharpsl-pm",
1007 },
1008};
1009
1010static int __devinit sharpsl_pm_init(void)
1011{
1012 return platform_driver_register(&sharpsl_pm_driver);
1013}
1014
1015static void sharpsl_pm_exit(void)
1016{
1017 platform_driver_unregister(&sharpsl_pm_driver);
1018}
1019
1020late_initcall(sharpsl_pm_init);
1021module_exit(sharpsl_pm_exit);
Linux kernel - Deliverables
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