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platform-drivers: move probe to .devinit.text in arch/arm
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / arm / mach-pxa / sharpsl_pm.c
blob463d874bb8676d5cfdf359c6d9683105cfb97689
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/pxa2xx-gpio.h>
32 #include <mach/regs-rtc.h>
33 #include <mach/sharpsl.h>
34 #include <mach/sharpsl_pm.h>
35
36 #include "sharpsl.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 #ifdef CONFIG_PM
59 static int sharpsl_off_charge_battery(void);
60 static int sharpsl_check_battery_voltage(void);
61 static int sharpsl_fatal_check(void);
62 #endif
63 static int sharpsl_check_battery_temp(void);
64 static int sharpsl_ac_check(void);
65 static int sharpsl_average_value(int ad);
66 static void sharpsl_average_clear(void);
67 static void sharpsl_charge_toggle(struct work_struct *private_);
68 static void sharpsl_battery_thread(struct work_struct *private_);
69
70
71 /*
72 * Variables
73 */
74 struct sharpsl_pm_status sharpsl_pm;
75 static DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
76 static DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
77 DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
78
79
80
81 struct battery_thresh sharpsl_battery_levels_acin[] = {
82 { 213, 100},
83 { 212, 98},
84 { 211, 95},
85 { 210, 93},
86 { 209, 90},
87 { 208, 88},
88 { 207, 85},
89 { 206, 83},
90 { 205, 80},
91 { 204, 78},
92 { 203, 75},
93 { 202, 73},
94 { 201, 70},
95 { 200, 68},
96 { 199, 65},
97 { 198, 63},
98 { 197, 60},
99 { 196, 58},
100 { 195, 55},
101 { 194, 53},
102 { 193, 50},
103 { 192, 48},
104 { 192, 45},
105 { 191, 43},
106 { 191, 40},
107 { 190, 38},
108 { 190, 35},
109 { 189, 33},
110 { 188, 30},
111 { 187, 28},
112 { 186, 25},
113 { 185, 23},
114 { 184, 20},
115 { 183, 18},
116 { 182, 15},
117 { 181, 13},
118 { 180, 10},
119 { 179, 8},
120 { 178, 5},
121 { 0, 0},
122 };
123
124 struct battery_thresh sharpsl_battery_levels_noac[] = {
125 { 213, 100},
126 { 212, 98},
127 { 211, 95},
128 { 210, 93},
129 { 209, 90},
130 { 208, 88},
131 { 207, 85},
132 { 206, 83},
133 { 205, 80},
134 { 204, 78},
135 { 203, 75},
136 { 202, 73},
137 { 201, 70},
138 { 200, 68},
139 { 199, 65},
140 { 198, 63},
141 { 197, 60},
142 { 196, 58},
143 { 195, 55},
144 { 194, 53},
145 { 193, 50},
146 { 192, 48},
147 { 191, 45},
148 { 190, 43},
149 { 189, 40},
150 { 188, 38},
151 { 187, 35},
152 { 186, 33},
153 { 185, 30},
154 { 184, 28},
155 { 183, 25},
156 { 182, 23},
157 { 181, 20},
158 { 180, 18},
159 { 179, 15},
160 { 178, 13},
161 { 177, 10},
162 { 176, 8},
163 { 175, 5},
164 { 0, 0},
165 };
166
167 /* MAX1111 Commands */
168 #define MAXCTRL_PD0 (1u << 0)
169 #define MAXCTRL_PD1 (1u << 1)
170 #define MAXCTRL_SGL (1u << 2)
171 #define MAXCTRL_UNI (1u << 3)
172 #define MAXCTRL_SEL_SH 4
173 #define MAXCTRL_STR (1u << 7)
174
175 /*
176 * Read MAX1111 ADC
177 */
178 int sharpsl_pm_pxa_read_max1111(int channel)
179 {
180 /* Ugly, better move this function into another module */
181 if (machine_is_tosa())
182 return 0;
183
184 #ifdef CONFIG_CORGI_SSP_DEPRECATED
185 return corgi_ssp_max1111_get((channel << MAXCTRL_SEL_SH) | MAXCTRL_PD0 | MAXCTRL_PD1
186 | MAXCTRL_SGL | MAXCTRL_UNI | MAXCTRL_STR);
187 #else
188 extern int max1111_read_channel(int);
189
190 /* max1111 accepts channels from 0-3, however,
191 * it is encoded from 0-7 here in the code.
192 */
193 return max1111_read_channel(channel >> 1);
194 #endif
195 }
196
197 static int get_percentage(int voltage)
198 {
199 int i = sharpsl_pm.machinfo->bat_levels - 1;
200 int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
201 struct battery_thresh *thresh;
202
203 if (sharpsl_pm.charge_mode == CHRG_ON)
204 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
205 else
206 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
207
208 while (i > 0 && (voltage > thresh[i].voltage))
209 i--;
210
211 return thresh[i].percentage;
212 }
213
214 static int get_apm_status(int voltage)
215 {
216 int low_thresh, high_thresh;
217
218 if (sharpsl_pm.charge_mode == CHRG_ON) {
219 high_thresh = sharpsl_pm.machinfo->status_high_acin;
220 low_thresh = sharpsl_pm.machinfo->status_low_acin;
221 } else {
222 high_thresh = sharpsl_pm.machinfo->status_high_noac;
223 low_thresh = sharpsl_pm.machinfo->status_low_noac;
224 }
225
226 if (voltage >= high_thresh)
227 return APM_BATTERY_STATUS_HIGH;
228 if (voltage >= low_thresh)
229 return APM_BATTERY_STATUS_LOW;
230 return APM_BATTERY_STATUS_CRITICAL;
231 }
232
233 void sharpsl_battery_kick(void)
234 {
235 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
236 }
237 EXPORT_SYMBOL(sharpsl_battery_kick);
238
239
240 static void sharpsl_battery_thread(struct work_struct *private_)
241 {
242 int voltage, percent, apm_status, i;
243
244 if (!sharpsl_pm.machinfo)
245 return;
246
247 sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
248
249 /* Corgi cannot confirm when battery fully charged so periodically kick! */
250 if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
251 && time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_ON_TIME_INTERVAL))
252 schedule_delayed_work(&toggle_charger, 0);
253
254 for (i = 0; i < 5; i++) {
255 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
256 if (voltage > 0)
257 break;
258 }
259 if (voltage <= 0) {
260 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
261 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
262 }
263
264 voltage = sharpsl_average_value(voltage);
265 apm_status = get_apm_status(voltage);
266 percent = get_percentage(voltage);
267
268 /* At low battery voltages, the voltage has a tendency to start
269 creeping back up so we try to avoid this here */
270 if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE)
271 || (apm_status == APM_BATTERY_STATUS_HIGH)
272 || percent <= sharpsl_pm.battstat.mainbat_percent) {
273 sharpsl_pm.battstat.mainbat_voltage = voltage;
274 sharpsl_pm.battstat.mainbat_status = apm_status;
275 sharpsl_pm.battstat.mainbat_percent = percent;
276 }
277
278 dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
279 sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
280
281 #ifdef CONFIG_BACKLIGHT_CORGI
282 /* If battery is low. limit backlight intensity to save power. */
283 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
284 && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW)
285 || (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
286 if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
287 sharpsl_pm.machinfo->backlight_limit(1);
288 sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
289 }
290 } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
291 sharpsl_pm.machinfo->backlight_limit(0);
292 sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
293 }
294 #endif
295
296 /* Suspend if critical battery level */
297 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
298 && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
299 && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
300 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
301 dev_err(sharpsl_pm.dev, "Fatal Off\n");
302 apm_queue_event(APM_CRITICAL_SUSPEND);
303 }
304
305 schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
306 }
307
308 void sharpsl_pm_led(int val)
309 {
310 if (val == SHARPSL_LED_ERROR) {
311 dev_err(sharpsl_pm.dev, "Charging Error!\n");
312 } else if (val == SHARPSL_LED_ON) {
313 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
314 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
315 } else {
316 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
317 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
318 }
319 }
320
321 static void sharpsl_charge_on(void)
322 {
323 dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
324
325 sharpsl_pm.full_count = 0;
326 sharpsl_pm.charge_mode = CHRG_ON;
327 schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
328 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
329 }
330
331 static void sharpsl_charge_off(void)
332 {
333 dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
334
335 sharpsl_pm.machinfo->charge(0);
336 sharpsl_pm_led(SHARPSL_LED_OFF);
337 sharpsl_pm.charge_mode = CHRG_OFF;
338
339 schedule_delayed_work(&sharpsl_bat, 0);
340 }
341
342 static void sharpsl_charge_error(void)
343 {
344 sharpsl_pm_led(SHARPSL_LED_ERROR);
345 sharpsl_pm.machinfo->charge(0);
346 sharpsl_pm.charge_mode = CHRG_ERROR;
347 }
348
349 static void sharpsl_charge_toggle(struct work_struct *private_)
350 {
351 dev_dbg(sharpsl_pm.dev, "Toggling Charger at time: %lx\n", jiffies);
352
353 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
354 sharpsl_charge_off();
355 return;
356 } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
357 sharpsl_charge_error();
358 return;
359 }
360
361 sharpsl_pm_led(SHARPSL_LED_ON);
362 sharpsl_pm.machinfo->charge(0);
363 mdelay(SHARPSL_CHARGE_WAIT_TIME);
364 sharpsl_pm.machinfo->charge(1);
365
366 sharpsl_pm.charge_start_time = jiffies;
367 }
368
369 static void sharpsl_ac_timer(unsigned long data)
370 {
371 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
372
373 dev_dbg(sharpsl_pm.dev, "AC Status: %d\n", acin);
374
375 sharpsl_average_clear();
376 if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
377 sharpsl_charge_on();
378 else if (sharpsl_pm.charge_mode == CHRG_ON)
379 sharpsl_charge_off();
380
381 schedule_delayed_work(&sharpsl_bat, 0);
382 }
383
384
385 static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
386 {
387 /* Delay the event slightly to debounce */
388 /* Must be a smaller delay than the chrg_full_isr below */
389 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
390
391 return IRQ_HANDLED;
392 }
393
394 static void sharpsl_chrg_full_timer(unsigned long data)
395 {
396 dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
397
398 sharpsl_pm.full_count++;
399
400 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
401 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
402 if (sharpsl_pm.charge_mode == CHRG_ON)
403 sharpsl_charge_off();
404 } else if (sharpsl_pm.full_count < 2) {
405 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
406 schedule_delayed_work(&toggle_charger, 0);
407 } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
408 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
409 schedule_delayed_work(&toggle_charger, 0);
410 } else {
411 sharpsl_charge_off();
412 sharpsl_pm.charge_mode = CHRG_DONE;
413 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
414 }
415 }
416
417 /* Charging Finished Interrupt (Not present on Corgi) */
418 /* Can trigger at the same time as an AC status change so
419 delay until after that has been processed */
420 static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
421 {
422 if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
423 return IRQ_HANDLED;
424
425 /* delay until after any ac interrupt */
426 mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
427
428 return IRQ_HANDLED;
429 }
430
431 static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
432 {
433 int is_fatal = 0;
434
435 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
436 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
437 is_fatal = 1;
438 }
439
440 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
441 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
442 is_fatal = 1;
443 }
444
445 if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
446 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
447 apm_queue_event(APM_CRITICAL_SUSPEND);
448 }
449
450 return IRQ_HANDLED;
451 }
452
453 /*
454 * Maintain an average of the last 10 readings
455 */
456 #define SHARPSL_CNV_VALUE_NUM 10
457 static int sharpsl_ad_index;
458
459 static void sharpsl_average_clear(void)
460 {
461 sharpsl_ad_index = 0;
462 }
463
464 static int sharpsl_average_value(int ad)
465 {
466 int i, ad_val = 0;
467 static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
468
469 if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
470 sharpsl_ad_index = 0;
471 return ad;
472 }
473
474 sharpsl_ad[sharpsl_ad_index] = ad;
475 sharpsl_ad_index++;
476 if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
477 for (i = 0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
478 sharpsl_ad[i] = sharpsl_ad[i+1];
479 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
480 }
481 for (i = 0; i < sharpsl_ad_index; i++)
482 ad_val += sharpsl_ad[i];
483
484 return ad_val / sharpsl_ad_index;
485 }
486
487 /*
488 * Take an array of 5 integers, remove the maximum and minimum values
489 * and return the average.
490 */
491 static int get_select_val(int *val)
492 {
493 int i, j, k, temp, sum = 0;
494
495 /* Find MAX val */
496 temp = val[0];
497 j = 0;
498 for (i = 1; i < 5; i++) {
499 if (temp < val[i]) {
500 temp = val[i];
501 j = i;
502 }
503 }
504
505 /* Find MIN val */
506 temp = val[4];
507 k = 4;
508 for (i = 3; i >= 0; i--) {
509 if (temp > val[i]) {
510 temp = val[i];
511 k = i;
512 }
513 }
514
515 for (i = 0; i < 5; i++)
516 if (i != j && i != k)
517 sum += val[i];
518
519 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]);
520
521 return sum/3;
522 }
523
524 static int sharpsl_check_battery_temp(void)
525 {
526 int val, i, buff[5];
527
528 /* Check battery temperature */
529 for (i = 0; i < 5; i++) {
530 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
531 sharpsl_pm.machinfo->measure_temp(1);
532 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
533 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
534 sharpsl_pm.machinfo->measure_temp(0);
535 }
536
537 val = get_select_val(buff);
538
539 dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
540 if (val > sharpsl_pm.machinfo->charge_on_temp) {
541 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
542 return -1;
543 }
544
545 return 0;
546 }
547
548 #ifdef CONFIG_PM
549 static int sharpsl_check_battery_voltage(void)
550 {
551 int val, i, buff[5];
552
553 /* disable charge, enable discharge */
554 sharpsl_pm.machinfo->charge(0);
555 sharpsl_pm.machinfo->discharge(1);
556 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
557
558 if (sharpsl_pm.machinfo->discharge1)
559 sharpsl_pm.machinfo->discharge1(1);
560
561 /* Check battery voltage */
562 for (i = 0; i < 5; i++) {
563 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
564 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
565 }
566
567 if (sharpsl_pm.machinfo->discharge1)
568 sharpsl_pm.machinfo->discharge1(0);
569
570 sharpsl_pm.machinfo->discharge(0);
571
572 val = get_select_val(buff);
573 dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
574
575 if (val < sharpsl_pm.machinfo->charge_on_volt)
576 return -1;
577
578 return 0;
579 }
580 #endif
581
582 static int sharpsl_ac_check(void)
583 {
584 int temp, i, buff[5];
585
586 for (i = 0; i < 5; i++) {
587 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
588 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
589 }
590
591 temp = get_select_val(buff);
592 dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n", temp);
593
594 if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
595 dev_err(sharpsl_pm.dev, "Error: AC check failed: voltage %d.\n", temp);
596 return -1;
597 }
598
599 return 0;
600 }
601
602 #ifdef CONFIG_PM
603 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
604 {
605 sharpsl_pm.flags |= SHARPSL_SUSPENDED;
606 flush_scheduled_work();
607
608 if (sharpsl_pm.charge_mode == CHRG_ON)
609 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
610 else
611 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
612
613 return 0;
614 }
615
616 static int sharpsl_pm_resume(struct platform_device *pdev)
617 {
618 /* Clear the reset source indicators as they break the bootloader upon reboot */
619 RCSR = 0x0f;
620 sharpsl_average_clear();
621 sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
622 sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
623
624 return 0;
625 }
626
627 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
628 {
629 dev_dbg(sharpsl_pm.dev, "Time is: %08x\n", RCNR);
630
631 dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n", sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
632 /* not charging and AC-IN! */
633
634 if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
635 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
636 sharpsl_pm.charge_mode = CHRG_OFF;
637 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
638 sharpsl_off_charge_battery();
639 }
640
641 sharpsl_pm.machinfo->presuspend();
642
643 PEDR = 0xffffffff; /* clear it */
644
645 sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
646 if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
647 RTSR &= RTSR_ALE;
648 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
649 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n", RTAR);
650 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
651 } else if (alarm_enable) {
652 RTSR &= RTSR_ALE;
653 RTAR = alarm_time;
654 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n", RTAR);
655 } else {
656 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
657 }
658
659 pxa_pm_enter(state);
660
661 sharpsl_pm.machinfo->postsuspend();
662
663 dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n", PEDR);
664 }
665
666 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
667 {
668 if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable)) {
669 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
670 dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
671 corgi_goto_sleep(alarm_time, alarm_enable, state);
672 return 1;
673 }
674 if (sharpsl_off_charge_battery()) {
675 dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
676 corgi_goto_sleep(alarm_time, alarm_enable, state);
677 return 1;
678 }
679 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
680 }
681
682 if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) ||
683 (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL))) {
684 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
685 corgi_goto_sleep(alarm_time, alarm_enable, state);
686 return 1;
687 }
688
689 return 0;
690 }
691
692 static int corgi_pxa_pm_enter(suspend_state_t state)
693 {
694 unsigned long alarm_time = RTAR;
695 unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
696
697 dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
698
699 corgi_goto_sleep(alarm_time, alarm_status, state);
700
701 while (corgi_enter_suspend(alarm_time, alarm_status, state))
702 {}
703
704 if (sharpsl_pm.machinfo->earlyresume)
705 sharpsl_pm.machinfo->earlyresume();
706
707 dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
708
709 return 0;
710 }
711
712 /*
713 * Check for fatal battery errors
714 * Fatal returns -1
715 */
716 static int sharpsl_fatal_check(void)
717 {
718 int buff[5], temp, i, acin;
719
720 dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
721
722 /* Check AC-Adapter */
723 acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
724
725 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
726 sharpsl_pm.machinfo->charge(0);
727 udelay(100);
728 sharpsl_pm.machinfo->discharge(1); /* enable discharge */
729 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
730 }
731
732 if (sharpsl_pm.machinfo->discharge1)
733 sharpsl_pm.machinfo->discharge1(1);
734
735 /* Check battery : check inserting battery ? */
736 for (i = 0; i < 5; i++) {
737 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
738 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
739 }
740
741 if (sharpsl_pm.machinfo->discharge1)
742 sharpsl_pm.machinfo->discharge1(0);
743
744 if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
745 udelay(100);
746 sharpsl_pm.machinfo->charge(1);
747 sharpsl_pm.machinfo->discharge(0);
748 }
749
750 temp = get_select_val(buff);
751 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));
752
753 if ((acin && (temp < sharpsl_pm.machinfo->fatal_acin_volt)) ||
754 (!acin && (temp < sharpsl_pm.machinfo->fatal_noacin_volt)))
755 return -1;
756 return 0;
757 }
758
759 static int sharpsl_off_charge_error(void)
760 {
761 dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
762 sharpsl_pm.machinfo->charge(0);
763 sharpsl_pm_led(SHARPSL_LED_ERROR);
764 sharpsl_pm.charge_mode = CHRG_ERROR;
765 return 1;
766 }
767
768 /*
769 * Charging Control while suspended
770 * Return 1 - go straight to sleep
771 * Return 0 - sleep or wakeup depending on other factors
772 */
773 static int sharpsl_off_charge_battery(void)
774 {
775 int time;
776
777 dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
778
779 if (sharpsl_pm.charge_mode == CHRG_OFF) {
780 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
781
782 /* AC Check */
783 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
784 return sharpsl_off_charge_error();
785
786 /* Start Charging */
787 sharpsl_pm_led(SHARPSL_LED_ON);
788 sharpsl_pm.machinfo->charge(0);
789 mdelay(SHARPSL_CHARGE_WAIT_TIME);
790 sharpsl_pm.machinfo->charge(1);
791
792 sharpsl_pm.charge_mode = CHRG_ON;
793 sharpsl_pm.full_count = 0;
794
795 return 1;
796 } else if (sharpsl_pm.charge_mode != CHRG_ON) {
797 return 1;
798 }
799
800 if (sharpsl_pm.full_count == 0) {
801 int time;
802
803 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
804
805 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
806 return sharpsl_off_charge_error();
807
808 sharpsl_pm.machinfo->charge(0);
809 mdelay(SHARPSL_CHARGE_WAIT_TIME);
810 sharpsl_pm.machinfo->charge(1);
811 sharpsl_pm.charge_mode = CHRG_ON;
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() != 0)
819 return 0;
820 /* Check for timeout */
821 if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
822 return 1;
823 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
824 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
825 sharpsl_pm.full_count++;
826 sharpsl_pm.machinfo->charge(0);
827 mdelay(SHARPSL_CHARGE_WAIT_TIME);
828 sharpsl_pm.machinfo->charge(1);
829 return 1;
830 }
831 }
832 }
833
834 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
835
836 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
837
838 time = RCNR;
839 while (1) {
840 /* Check if any wakeup event had occurred */
841 if (sharpsl_pm.machinfo->charger_wakeup())
842 return 0;
843 /* Check for timeout */
844 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
845 if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
846 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
847 sharpsl_pm.full_count = 0;
848 }
849 sharpsl_pm.full_count++;
850 return 1;
851 }
852 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
853 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
854 sharpsl_pm_led(SHARPSL_LED_OFF);
855 sharpsl_pm.machinfo->charge(0);
856 sharpsl_pm.charge_mode = CHRG_DONE;
857 return 1;
858 }
859 }
860 }
861 #else
862 #define sharpsl_pm_suspend NULL
863 #define sharpsl_pm_resume NULL
864 #endif
865
866 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
867 {
868 return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_percent);
869 }
870
871 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
872 {
873 return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_voltage);
874 }
875
876 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
877 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
878
879 extern void (*apm_get_power_status)(struct apm_power_info *);
880
881 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
882 {
883 info->ac_line_status = sharpsl_pm.battstat.ac_status;
884
885 if (sharpsl_pm.charge_mode == CHRG_ON)
886 info->battery_status = APM_BATTERY_STATUS_CHARGING;
887 else
888 info->battery_status = sharpsl_pm.battstat.mainbat_status;
889
890 info->battery_flag = (1 << info->battery_status);
891 info->battery_life = sharpsl_pm.battstat.mainbat_percent;
892 }
893
894 #ifdef CONFIG_PM
895 static struct platform_suspend_ops sharpsl_pm_ops = {
896 .prepare = pxa_pm_prepare,
897 .finish = pxa_pm_finish,
898 .enter = corgi_pxa_pm_enter,
899 .valid = suspend_valid_only_mem,
900 };
901 #endif
902
903 static int __devinit sharpsl_pm_probe(struct platform_device *pdev)
904 {
905 int ret;
906
907 if (!pdev->dev.platform_data)
908 return -EINVAL;
909
910 sharpsl_pm.dev = &pdev->dev;
911 sharpsl_pm.machinfo = pdev->dev.platform_data;
912 sharpsl_pm.charge_mode = CHRG_OFF;
913 sharpsl_pm.flags = 0;
914
915 init_timer(&sharpsl_pm.ac_timer);
916 sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
917
918 init_timer(&sharpsl_pm.chrg_full_timer);
919 sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
920
921 led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
922
923 sharpsl_pm.machinfo->init();
924
925 gpio_request(sharpsl_pm.machinfo->gpio_acin, "AC IN");
926 gpio_direction_input(sharpsl_pm.machinfo->gpio_acin);
927 gpio_request(sharpsl_pm.machinfo->gpio_batfull, "Battery Full");
928 gpio_direction_input(sharpsl_pm.machinfo->gpio_batfull);
929 gpio_request(sharpsl_pm.machinfo->gpio_batlock, "Battery Lock");
930 gpio_direction_input(sharpsl_pm.machinfo->gpio_batlock);
931
932 /* Register interrupt handlers */
933 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)) {
934 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin));
935 }
936
937 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) {
938 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock));
939 }
940
941 if (sharpsl_pm.machinfo->gpio_fatal) {
942 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) {
943 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal));
944 }
945 }
946
947 if (sharpsl_pm.machinfo->batfull_irq) {
948 /* Register interrupt handler. */
949 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr, IRQF_DISABLED | IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) {
950 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull));
951 }
952 }
953
954 ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
955 ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
956 if (ret != 0)
957 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
958
959 apm_get_power_status = sharpsl_apm_get_power_status;
960
961 #ifdef CONFIG_PM
962 suspend_set_ops(&sharpsl_pm_ops);
963 #endif
964
965 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
966
967 return 0;
968 }
969
970 static int sharpsl_pm_remove(struct platform_device *pdev)
971 {
972 suspend_set_ops(NULL);
973
974 device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
975 device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
976
977 led_trigger_unregister_simple(sharpsl_charge_led_trigger);
978
979 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
980 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
981
982 if (sharpsl_pm.machinfo->gpio_fatal)
983 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
984
985 if (sharpsl_pm.machinfo->batfull_irq)
986 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
987
988 gpio_free(sharpsl_pm.machinfo->gpio_batlock);
989 gpio_free(sharpsl_pm.machinfo->gpio_batfull);
990 gpio_free(sharpsl_pm.machinfo->gpio_acin);
991
992 if (sharpsl_pm.machinfo->exit)
993 sharpsl_pm.machinfo->exit();
994
995 del_timer_sync(&sharpsl_pm.chrg_full_timer);
996 del_timer_sync(&sharpsl_pm.ac_timer);
997
998 return 0;
999 }
1000
1001 static struct platform_driver sharpsl_pm_driver = {
1002 .probe = sharpsl_pm_probe,
1003 .remove = sharpsl_pm_remove,
1004 .suspend = sharpsl_pm_suspend,
1005 .resume = sharpsl_pm_resume,
1006 .driver = {
1007 .name = "sharpsl-pm",
1008 },
1009 };
1010
1011 static int __devinit sharpsl_pm_init(void)
1012 {
1013 return platform_driver_register(&sharpsl_pm_driver);
1014 }
1015
1016 static void sharpsl_pm_exit(void)
1017 {
1018 platform_driver_unregister(&sharpsl_pm_driver);
1019 }
1020
1021 late_initcall(sharpsl_pm_init);
1022 module_exit(sharpsl_pm_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree