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MIPS: Yosemite, Emma: Fix off-by-two in arcs_cmdline buffer size check
[linux-2.6/linux-mips.git] / arch / arm / mach-pxa / sharpsl_pm.c
blob785880f67b60f9fac6f79f10c65c4ff13a137049
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
28 #include <asm/mach-types.h>
29 #include <mach/pm.h>
30 #include <mach/pxa2xx-regs.h>
31 #include <mach/regs-rtc.h>
32 #include <mach/sharpsl_pm.h>
33
34 /*
35 * Constants
36 */
37 #define SHARPSL_CHARGE_ON_TIME_INTERVAL (msecs_to_jiffies(1*60*1000)) /* 1 min */
38 #define SHARPSL_CHARGE_FINISH_TIME (msecs_to_jiffies(10*60*1000)) /* 10 min */
39 #define SHARPSL_BATCHK_TIME (msecs_to_jiffies(15*1000)) /* 15 sec */
40 #define SHARPSL_BATCHK_TIME_SUSPEND (60*10) /* 10 min */
41
42 #define SHARPSL_WAIT_CO_TIME 15 /* 15 sec */
43 #define SHARPSL_WAIT_DISCHARGE_ON 100 /* 100 msec */
44 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP 10 /* 10 msec */
45 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT 10 /* 10 msec */
46 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN 10 /* 10 msec */
47 #define SHARPSL_CHARGE_WAIT_TIME 15 /* 15 msec */
48 #define SHARPSL_CHARGE_CO_CHECK_TIME 5 /* 5 msec */
49 #define SHARPSL_CHARGE_RETRY_CNT 1 /* eqv. 10 min */
50
51 /*
52 * Prototypes
53 */
54 #ifdef CONFIG_PM
55 static int sharpsl_off_charge_battery(void);
56 static int sharpsl_check_battery_voltage(void);
57 static int sharpsl_fatal_check(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 /*
172 * Read MAX1111 ADC
173 */
174 int sharpsl_pm_pxa_read_max1111(int channel)
175 {
176 /* Ugly, better move this function into another module */
177 if (machine_is_tosa())
178 return 0;
179
180 extern int max1111_read_channel(int);
181
182 /* max1111 accepts channels from 0-3, however,
183 * it is encoded from 0-7 here in the code.
184 */
185 return max1111_read_channel(channel >> 1);
186 }
187
188 static int get_percentage(int voltage)
189 {
190 int i = sharpsl_pm.machinfo->bat_levels - 1;
191 int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
192 struct battery_thresh *thresh;
193
194 if (sharpsl_pm.charge_mode == CHRG_ON)
195 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
196 else
197 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
198
199 while (i > 0 && (voltage > thresh[i].voltage))
200 i--;
201
202 return thresh[i].percentage;
203 }
204
205 static int get_apm_status(int voltage)
206 {
207 int low_thresh, high_thresh;
208
209 if (sharpsl_pm.charge_mode == CHRG_ON) {
210 high_thresh = sharpsl_pm.machinfo->status_high_acin;
211 low_thresh = sharpsl_pm.machinfo->status_low_acin;
212 } else {
213 high_thresh = sharpsl_pm.machinfo->status_high_noac;
214 low_thresh = sharpsl_pm.machinfo->status_low_noac;
215 }
216
217 if (voltage >= high_thresh)
218 return APM_BATTERY_STATUS_HIGH;
219 if (voltage >= low_thresh)
220 return APM_BATTERY_STATUS_LOW;
221 return APM_BATTERY_STATUS_CRITICAL;
222 }
223
224 void sharpsl_battery_kick(void)
225 {
226 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
227 }
228 EXPORT_SYMBOL(sharpsl_battery_kick);
229
230
231 static void sharpsl_battery_thread(struct work_struct *private_)
232 {
233 int voltage, percent, apm_status, i;
234
235 if (!sharpsl_pm.machinfo)
236 return;
237
238 sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
239
240 /* Corgi cannot confirm when battery fully charged so periodically kick! */
241 if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
242 && time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_ON_TIME_INTERVAL))
243 schedule_delayed_work(&toggle_charger, 0);
244
245 for (i = 0; i < 5; i++) {
246 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
247 if (voltage > 0)
248 break;
249 }
250 if (voltage <= 0) {
251 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
252 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
253 }
254
255 voltage = sharpsl_average_value(voltage);
256 apm_status = get_apm_status(voltage);
257 percent = get_percentage(voltage);
258
259 /* At low battery voltages, the voltage has a tendency to start
260 creeping back up so we try to avoid this here */
261 if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE)
262 || (apm_status == APM_BATTERY_STATUS_HIGH)
263 || percent <= sharpsl_pm.battstat.mainbat_percent) {
264 sharpsl_pm.battstat.mainbat_voltage = voltage;
265 sharpsl_pm.battstat.mainbat_status = apm_status;
266 sharpsl_pm.battstat.mainbat_percent = percent;
267 }
268
269 dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
270 sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
271
272 /* Suspend if critical battery level */
273 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
274 && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
275 && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
276 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
277 dev_err(sharpsl_pm.dev, "Fatal Off\n");
278 apm_queue_event(APM_CRITICAL_SUSPEND);
279 }
280
281 schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
282 }
283
284 void sharpsl_pm_led(int val)
285 {
286 if (val == SHARPSL_LED_ERROR) {
287 dev_err(sharpsl_pm.dev, "Charging Error!\n");
288 } else if (val == SHARPSL_LED_ON) {
289 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
290 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
291 } else {
292 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
293 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
294 }
295 }
296
297 static void sharpsl_charge_on(void)
298 {
299 dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
300
301 sharpsl_pm.full_count = 0;
302 sharpsl_pm.charge_mode = CHRG_ON;
303 schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
304 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
305 }
306
307 static void sharpsl_charge_off(void)
308 {
309 dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
310
311 sharpsl_pm.machinfo->charge(0);
312 sharpsl_pm_led(SHARPSL_LED_OFF);
313 sharpsl_pm.charge_mode = CHRG_OFF;
314
315 schedule_delayed_work(&sharpsl_bat, 0);
316 }
317
318 static void sharpsl_charge_error(void)
319 {
320 sharpsl_pm_led(SHARPSL_LED_ERROR);
321 sharpsl_pm.machinfo->charge(0);
322 sharpsl_pm.charge_mode = CHRG_ERROR;
323 }
324
325 static void sharpsl_charge_toggle(struct work_struct *private_)
326 {
327 dev_dbg(sharpsl_pm.dev, "Toggling Charger at time: %lx\n", jiffies);
328
329 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
330 sharpsl_charge_off();
331 return;
332 } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
333 sharpsl_charge_error();
334 return;
335 }
336
337 sharpsl_pm_led(SHARPSL_LED_ON);
338 sharpsl_pm.machinfo->charge(0);
339 mdelay(SHARPSL_CHARGE_WAIT_TIME);
340 sharpsl_pm.machinfo->charge(1);
341
342 sharpsl_pm.charge_start_time = jiffies;
343 }
344
345 static void sharpsl_ac_timer(unsigned long data)
346 {
347 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
348
349 dev_dbg(sharpsl_pm.dev, "AC Status: %d\n", acin);
350
351 sharpsl_average_clear();
352 if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
353 sharpsl_charge_on();
354 else if (sharpsl_pm.charge_mode == CHRG_ON)
355 sharpsl_charge_off();
356
357 schedule_delayed_work(&sharpsl_bat, 0);
358 }
359
360
361 static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
362 {
363 /* Delay the event slightly to debounce */
364 /* Must be a smaller delay than the chrg_full_isr below */
365 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
366
367 return IRQ_HANDLED;
368 }
369
370 static void sharpsl_chrg_full_timer(unsigned long data)
371 {
372 dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
373
374 sharpsl_pm.full_count++;
375
376 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
377 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
378 if (sharpsl_pm.charge_mode == CHRG_ON)
379 sharpsl_charge_off();
380 } else if (sharpsl_pm.full_count < 2) {
381 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
382 schedule_delayed_work(&toggle_charger, 0);
383 } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
384 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
385 schedule_delayed_work(&toggle_charger, 0);
386 } else {
387 sharpsl_charge_off();
388 sharpsl_pm.charge_mode = CHRG_DONE;
389 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
390 }
391 }
392
393 /* Charging Finished Interrupt (Not present on Corgi) */
394 /* Can trigger at the same time as an AC status change so
395 delay until after that has been processed */
396 static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
397 {
398 if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
399 return IRQ_HANDLED;
400
401 /* delay until after any ac interrupt */
402 mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
403
404 return IRQ_HANDLED;
405 }
406
407 static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
408 {
409 int is_fatal = 0;
410
411 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
412 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
413 is_fatal = 1;
414 }
415
416 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
417 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
418 is_fatal = 1;
419 }
420
421 if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
422 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
423 apm_queue_event(APM_CRITICAL_SUSPEND);
424 }
425
426 return IRQ_HANDLED;
427 }
428
429 /*
430 * Maintain an average of the last 10 readings
431 */
432 #define SHARPSL_CNV_VALUE_NUM 10
433 static int sharpsl_ad_index;
434
435 static void sharpsl_average_clear(void)
436 {
437 sharpsl_ad_index = 0;
438 }
439
440 static int sharpsl_average_value(int ad)
441 {
442 int i, ad_val = 0;
443 static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
444
445 if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
446 sharpsl_ad_index = 0;
447 return ad;
448 }
449
450 sharpsl_ad[sharpsl_ad_index] = ad;
451 sharpsl_ad_index++;
452 if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
453 for (i = 0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
454 sharpsl_ad[i] = sharpsl_ad[i+1];
455 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
456 }
457 for (i = 0; i < sharpsl_ad_index; i++)
458 ad_val += sharpsl_ad[i];
459
460 return ad_val / sharpsl_ad_index;
461 }
462
463 /*
464 * Take an array of 5 integers, remove the maximum and minimum values
465 * and return the average.
466 */
467 static int get_select_val(int *val)
468 {
469 int i, j, k, temp, sum = 0;
470
471 /* Find MAX val */
472 temp = val[0];
473 j = 0;
474 for (i = 1; i < 5; i++) {
475 if (temp < val[i]) {
476 temp = val[i];
477 j = i;
478 }
479 }
480
481 /* Find MIN val */
482 temp = val[4];
483 k = 4;
484 for (i = 3; i >= 0; i--) {
485 if (temp > val[i]) {
486 temp = val[i];
487 k = i;
488 }
489 }
490
491 for (i = 0; i < 5; i++)
492 if (i != j && i != k)
493 sum += val[i];
494
495 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]);
496
497 return sum/3;
498 }
499
500 static int sharpsl_check_battery_temp(void)
501 {
502 int val, i, buff[5];
503
504 /* Check battery temperature */
505 for (i = 0; i < 5; i++) {
506 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
507 sharpsl_pm.machinfo->measure_temp(1);
508 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
509 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
510 sharpsl_pm.machinfo->measure_temp(0);
511 }
512
513 val = get_select_val(buff);
514
515 dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
516 if (val > sharpsl_pm.machinfo->charge_on_temp) {
517 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
518 return -1;
519 }
520
521 return 0;
522 }
523
524 #ifdef CONFIG_PM
525 static int sharpsl_check_battery_voltage(void)
526 {
527 int val, i, buff[5];
528
529 /* disable charge, enable discharge */
530 sharpsl_pm.machinfo->charge(0);
531 sharpsl_pm.machinfo->discharge(1);
532 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
533
534 if (sharpsl_pm.machinfo->discharge1)
535 sharpsl_pm.machinfo->discharge1(1);
536
537 /* Check battery voltage */
538 for (i = 0; i < 5; i++) {
539 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
540 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
541 }
542
543 if (sharpsl_pm.machinfo->discharge1)
544 sharpsl_pm.machinfo->discharge1(0);
545
546 sharpsl_pm.machinfo->discharge(0);
547
548 val = get_select_val(buff);
549 dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
550
551 if (val < sharpsl_pm.machinfo->charge_on_volt)
552 return -1;
553
554 return 0;
555 }
556 #endif
557
558 static int sharpsl_ac_check(void)
559 {
560 int temp, i, buff[5];
561
562 for (i = 0; i < 5; i++) {
563 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
564 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
565 }
566
567 temp = get_select_val(buff);
568 dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n", temp);
569
570 if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
571 dev_err(sharpsl_pm.dev, "Error: AC check failed: voltage %d.\n", temp);
572 return -1;
573 }
574
575 return 0;
576 }
577
578 #ifdef CONFIG_PM
579 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
580 {
581 sharpsl_pm.flags |= SHARPSL_SUSPENDED;
582 flush_delayed_work_sync(&toggle_charger);
583 flush_delayed_work_sync(&sharpsl_bat);
584
585 if (sharpsl_pm.charge_mode == CHRG_ON)
586 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
587 else
588 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
589
590 return 0;
591 }
592
593 static int sharpsl_pm_resume(struct platform_device *pdev)
594 {
595 /* Clear the reset source indicators as they break the bootloader upon reboot */
596 RCSR = 0x0f;
597 sharpsl_average_clear();
598 sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
599 sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
600
601 return 0;
602 }
603
604 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
605 {
606 dev_dbg(sharpsl_pm.dev, "Time is: %08x\n", RCNR);
607
608 dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n", sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
609 /* not charging and AC-IN! */
610
611 if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
612 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
613 sharpsl_pm.charge_mode = CHRG_OFF;
614 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
615 sharpsl_off_charge_battery();
616 }
617
618 sharpsl_pm.machinfo->presuspend();
619
620 PEDR = 0xffffffff; /* clear it */
621
622 sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
623 if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
624 RTSR &= RTSR_ALE;
625 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
626 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n", RTAR);
627 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
628 } else if (alarm_enable) {
629 RTSR &= RTSR_ALE;
630 RTAR = alarm_time;
631 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n", RTAR);
632 } else {
633 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
634 }
635
636 pxa_pm_enter(state);
637
638 sharpsl_pm.machinfo->postsuspend();
639
640 dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n", PEDR);
641 }
642
643 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
644 {
645 if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable)) {
646 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
647 dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
648 corgi_goto_sleep(alarm_time, alarm_enable, state);
649 return 1;
650 }
651 if (sharpsl_off_charge_battery()) {
652 dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
653 corgi_goto_sleep(alarm_time, alarm_enable, state);
654 return 1;
655 }
656 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
657 }
658
659 if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) ||
660 (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL))) {
661 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
662 corgi_goto_sleep(alarm_time, alarm_enable, state);
663 return 1;
664 }
665
666 return 0;
667 }
668
669 static int corgi_pxa_pm_enter(suspend_state_t state)
670 {
671 unsigned long alarm_time = RTAR;
672 unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
673
674 dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
675
676 corgi_goto_sleep(alarm_time, alarm_status, state);
677
678 while (corgi_enter_suspend(alarm_time, alarm_status, state))
679 {}
680
681 if (sharpsl_pm.machinfo->earlyresume)
682 sharpsl_pm.machinfo->earlyresume();
683
684 dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
685
686 return 0;
687 }
688
689 /*
690 * Check for fatal battery errors
691 * Fatal returns -1
692 */
693 static int sharpsl_fatal_check(void)
694 {
695 int buff[5], temp, i, acin;
696
697 dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
698
699 /* Check AC-Adapter */
700 acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
701
702 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
703 sharpsl_pm.machinfo->charge(0);
704 udelay(100);
705 sharpsl_pm.machinfo->discharge(1); /* enable discharge */
706 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
707 }
708
709 if (sharpsl_pm.machinfo->discharge1)
710 sharpsl_pm.machinfo->discharge1(1);
711
712 /* Check battery : check inserting battery ? */
713 for (i = 0; i < 5; i++) {
714 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
715 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
716 }
717
718 if (sharpsl_pm.machinfo->discharge1)
719 sharpsl_pm.machinfo->discharge1(0);
720
721 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
722 udelay(100);
723 sharpsl_pm.machinfo->charge(1);
724 sharpsl_pm.machinfo->discharge(0);
725 }
726
727 temp = get_select_val(buff);
728 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));
729
730 if ((acin && (temp < sharpsl_pm.machinfo->fatal_acin_volt)) ||
731 (!acin && (temp < sharpsl_pm.machinfo->fatal_noacin_volt)))
732 return -1;
733 return 0;
734 }
735
736 static int sharpsl_off_charge_error(void)
737 {
738 dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
739 sharpsl_pm.machinfo->charge(0);
740 sharpsl_pm_led(SHARPSL_LED_ERROR);
741 sharpsl_pm.charge_mode = CHRG_ERROR;
742 return 1;
743 }
744
745 /*
746 * Charging Control while suspended
747 * Return 1 - go straight to sleep
748 * Return 0 - sleep or wakeup depending on other factors
749 */
750 static int sharpsl_off_charge_battery(void)
751 {
752 int time;
753
754 dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
755
756 if (sharpsl_pm.charge_mode == CHRG_OFF) {
757 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
758
759 /* AC Check */
760 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
761 return sharpsl_off_charge_error();
762
763 /* Start Charging */
764 sharpsl_pm_led(SHARPSL_LED_ON);
765 sharpsl_pm.machinfo->charge(0);
766 mdelay(SHARPSL_CHARGE_WAIT_TIME);
767 sharpsl_pm.machinfo->charge(1);
768
769 sharpsl_pm.charge_mode = CHRG_ON;
770 sharpsl_pm.full_count = 0;
771
772 return 1;
773 } else if (sharpsl_pm.charge_mode != CHRG_ON) {
774 return 1;
775 }
776
777 if (sharpsl_pm.full_count == 0) {
778 int time;
779
780 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
781
782 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
783 return sharpsl_off_charge_error();
784
785 sharpsl_pm.machinfo->charge(0);
786 mdelay(SHARPSL_CHARGE_WAIT_TIME);
787 sharpsl_pm.machinfo->charge(1);
788 sharpsl_pm.charge_mode = CHRG_ON;
789
790 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
791
792 time = RCNR;
793 while (1) {
794 /* Check if any wakeup event had occurred */
795 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
796 return 0;
797 /* Check for timeout */
798 if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
799 return 1;
800 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
801 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
802 sharpsl_pm.full_count++;
803 sharpsl_pm.machinfo->charge(0);
804 mdelay(SHARPSL_CHARGE_WAIT_TIME);
805 sharpsl_pm.machinfo->charge(1);
806 return 1;
807 }
808 }
809 }
810
811 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
812
813 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
814
815 time = RCNR;
816 while (1) {
817 /* Check if any wakeup event had occurred */
818 if (sharpsl_pm.machinfo->charger_wakeup())
819 return 0;
820 /* Check for timeout */
821 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
822 if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
823 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
824 sharpsl_pm.full_count = 0;
825 }
826 sharpsl_pm.full_count++;
827 return 1;
828 }
829 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
830 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
831 sharpsl_pm_led(SHARPSL_LED_OFF);
832 sharpsl_pm.machinfo->charge(0);
833 sharpsl_pm.charge_mode = CHRG_DONE;
834 return 1;
835 }
836 }
837 }
838 #else
839 #define sharpsl_pm_suspend NULL
840 #define sharpsl_pm_resume NULL
841 #endif
842
843 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
844 {
845 return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_percent);
846 }
847
848 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
849 {
850 return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_voltage);
851 }
852
853 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
854 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
855
856 extern void (*apm_get_power_status)(struct apm_power_info *);
857
858 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
859 {
860 info->ac_line_status = sharpsl_pm.battstat.ac_status;
861
862 if (sharpsl_pm.charge_mode == CHRG_ON)
863 info->battery_status = APM_BATTERY_STATUS_CHARGING;
864 else
865 info->battery_status = sharpsl_pm.battstat.mainbat_status;
866
867 info->battery_flag = (1 << info->battery_status);
868 info->battery_life = sharpsl_pm.battstat.mainbat_percent;
869 }
870
871 #ifdef CONFIG_PM
872 static const struct platform_suspend_ops sharpsl_pm_ops = {
873 .prepare = pxa_pm_prepare,
874 .finish = pxa_pm_finish,
875 .enter = corgi_pxa_pm_enter,
876 .valid = suspend_valid_only_mem,
877 };
878 #endif
879
880 static int __devinit sharpsl_pm_probe(struct platform_device *pdev)
881 {
882 int ret;
883
884 if (!pdev->dev.platform_data)
885 return -EINVAL;
886
887 sharpsl_pm.dev = &pdev->dev;
888 sharpsl_pm.machinfo = pdev->dev.platform_data;
889 sharpsl_pm.charge_mode = CHRG_OFF;
890 sharpsl_pm.flags = 0;
891
892 init_timer(&sharpsl_pm.ac_timer);
893 sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
894
895 init_timer(&sharpsl_pm.chrg_full_timer);
896 sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
897
898 led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
899
900 sharpsl_pm.machinfo->init();
901
902 gpio_request(sharpsl_pm.machinfo->gpio_acin, "AC IN");
903 gpio_direction_input(sharpsl_pm.machinfo->gpio_acin);
904 gpio_request(sharpsl_pm.machinfo->gpio_batfull, "Battery Full");
905 gpio_direction_input(sharpsl_pm.machinfo->gpio_batfull);
906 gpio_request(sharpsl_pm.machinfo->gpio_batlock, "Battery Lock");
907 gpio_direction_input(sharpsl_pm.machinfo->gpio_batlock);
908
909 /* Register interrupt handlers */
910 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)) {
911 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin));
912 }
913
914 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) {
915 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock));
916 }
917
918 if (sharpsl_pm.machinfo->gpio_fatal) {
919 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) {
920 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal));
921 }
922 }
923
924 if (sharpsl_pm.machinfo->batfull_irq) {
925 /* Register interrupt handler. */
926 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr, IRQF_DISABLED | IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) {
927 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull));
928 }
929 }
930
931 ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
932 ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
933 if (ret != 0)
934 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
935
936 apm_get_power_status = sharpsl_apm_get_power_status;
937
938 #ifdef CONFIG_PM
939 suspend_set_ops(&sharpsl_pm_ops);
940 #endif
941
942 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
943
944 return 0;
945 }
946
947 static int sharpsl_pm_remove(struct platform_device *pdev)
948 {
949 suspend_set_ops(NULL);
950
951 device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
952 device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
953
954 led_trigger_unregister_simple(sharpsl_charge_led_trigger);
955
956 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
957 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
958
959 if (sharpsl_pm.machinfo->gpio_fatal)
960 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
961
962 if (sharpsl_pm.machinfo->batfull_irq)
963 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
964
965 gpio_free(sharpsl_pm.machinfo->gpio_batlock);
966 gpio_free(sharpsl_pm.machinfo->gpio_batfull);
967 gpio_free(sharpsl_pm.machinfo->gpio_acin);
968
969 if (sharpsl_pm.machinfo->exit)
970 sharpsl_pm.machinfo->exit();
971
972 del_timer_sync(&sharpsl_pm.chrg_full_timer);
973 del_timer_sync(&sharpsl_pm.ac_timer);
974
975 return 0;
976 }
977
978 static struct platform_driver sharpsl_pm_driver = {
979 .probe = sharpsl_pm_probe,
980 .remove = sharpsl_pm_remove,
981 .suspend = sharpsl_pm_suspend,
982 .resume = sharpsl_pm_resume,
983 .driver = {
984 .name = "sharpsl-pm",
985 },
986 };
987
988 static int __devinit sharpsl_pm_init(void)
989 {
990 return platform_driver_register(&sharpsl_pm_driver);
991 }
992
993 static void sharpsl_pm_exit(void)
994 {
995 platform_driver_unregister(&sharpsl_pm_driver);
996 }
997
998 late_initcall(sharpsl_pm_init);
999 module_exit(sharpsl_pm_exit);
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