ARM: drivers: remove __dev* attributes.
[linux-3.10.git] / arch / arm / mach-pxa / sharpsl_pm.c
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 #include <linux/io.h>
28
29 #include <asm/mach-types.h>
30 #include <mach/pm.h>
31 #include <mach/pxa2xx-regs.h>
32 #include <mach/regs-rtc.h>
33 #include <mach/sharpsl_pm.h>
34
35 /*
36  * Constants
37  */
38 #define SHARPSL_CHARGE_ON_TIME_INTERVAL        (msecs_to_jiffies(1*60*1000))  /* 1 min */
39 #define SHARPSL_CHARGE_FINISH_TIME             (msecs_to_jiffies(10*60*1000)) /* 10 min */
40 #define SHARPSL_BATCHK_TIME                    (msecs_to_jiffies(15*1000))    /* 15 sec */
41 #define SHARPSL_BATCHK_TIME_SUSPEND            (60*10)                        /* 10 min */
42
43 #define SHARPSL_WAIT_CO_TIME                   15  /* 15 sec */
44 #define SHARPSL_WAIT_DISCHARGE_ON              100 /* 100 msec */
45 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP   10  /* 10 msec */
46 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT   10  /* 10 msec */
47 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN   10  /* 10 msec */
48 #define SHARPSL_CHARGE_WAIT_TIME               15  /* 15 msec */
49 #define SHARPSL_CHARGE_CO_CHECK_TIME           5   /* 5 msec */
50 #define SHARPSL_CHARGE_RETRY_CNT               1   /* eqv. 10 min */
51
52 /*
53  * Prototypes
54  */
55 #ifdef CONFIG_PM
56 static int sharpsl_off_charge_battery(void);
57 static int sharpsl_check_battery_voltage(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 extern int max1111_read_channel(int);
172 /*
173  * Read MAX1111 ADC
174  */
175 int sharpsl_pm_pxa_read_max1111(int channel)
176 {
177         /* Ugly, better move this function into another module */
178         if (machine_is_tosa())
179             return 0;
180
181         /* max1111 accepts channels from 0-3, however,
182          * it is encoded from 0-7 here in the code.
183          */
184         return max1111_read_channel(channel >> 1);
185 }
186
187 static int get_percentage(int voltage)
188 {
189         int i = sharpsl_pm.machinfo->bat_levels - 1;
190         int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
191         struct battery_thresh *thresh;
192
193         if (sharpsl_pm.charge_mode == CHRG_ON)
194                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
195         else
196                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
197
198         while (i > 0 && (voltage > thresh[i].voltage))
199                 i--;
200
201         return thresh[i].percentage;
202 }
203
204 static int get_apm_status(int voltage)
205 {
206         int low_thresh, high_thresh;
207
208         if (sharpsl_pm.charge_mode == CHRG_ON) {
209                 high_thresh = sharpsl_pm.machinfo->status_high_acin;
210                 low_thresh = sharpsl_pm.machinfo->status_low_acin;
211         } else {
212                 high_thresh = sharpsl_pm.machinfo->status_high_noac;
213                 low_thresh = sharpsl_pm.machinfo->status_low_noac;
214         }
215
216         if (voltage >= high_thresh)
217                 return APM_BATTERY_STATUS_HIGH;
218         if (voltage >= low_thresh)
219                 return APM_BATTERY_STATUS_LOW;
220         return APM_BATTERY_STATUS_CRITICAL;
221 }
222
223 void sharpsl_battery_kick(void)
224 {
225         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
226 }
227 EXPORT_SYMBOL(sharpsl_battery_kick);
228
229
230 static void sharpsl_battery_thread(struct work_struct *private_)
231 {
232         int voltage, percent, apm_status, i;
233
234         if (!sharpsl_pm.machinfo)
235                 return;
236
237         sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
238
239         /* Corgi cannot confirm when battery fully charged so periodically kick! */
240         if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
241                         && time_after(jiffies, sharpsl_pm.charge_start_time +  SHARPSL_CHARGE_ON_TIME_INTERVAL))
242                 schedule_delayed_work(&toggle_charger, 0);
243
244         for (i = 0; i < 5; i++) {
245                 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
246                 if (voltage > 0)
247                         break;
248         }
249         if (voltage <= 0) {
250                 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
251                 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
252         }
253
254         voltage = sharpsl_average_value(voltage);
255         apm_status = get_apm_status(voltage);
256         percent = get_percentage(voltage);
257
258         /* At low battery voltages, the voltage has a tendency to start
259            creeping back up so we try to avoid this here */
260         if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE)
261             || (apm_status == APM_BATTERY_STATUS_HIGH)
262             || percent <= sharpsl_pm.battstat.mainbat_percent) {
263                 sharpsl_pm.battstat.mainbat_voltage = voltage;
264                 sharpsl_pm.battstat.mainbat_status = apm_status;
265                 sharpsl_pm.battstat.mainbat_percent = percent;
266         }
267
268         dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
269                         sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
270
271         /* Suspend if critical battery level */
272         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
273              && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
274              && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
275                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
276                 dev_err(sharpsl_pm.dev, "Fatal Off\n");
277                 apm_queue_event(APM_CRITICAL_SUSPEND);
278         }
279
280         schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
281 }
282
283 void sharpsl_pm_led(int val)
284 {
285         if (val == SHARPSL_LED_ERROR) {
286                 dev_err(sharpsl_pm.dev, "Charging Error!\n");
287         } else if (val == SHARPSL_LED_ON) {
288                 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
289                 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
290         } else {
291                 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
292                 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
293         }
294 }
295
296 static void sharpsl_charge_on(void)
297 {
298         dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
299
300         sharpsl_pm.full_count = 0;
301         sharpsl_pm.charge_mode = CHRG_ON;
302         schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
303         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
304 }
305
306 static void sharpsl_charge_off(void)
307 {
308         dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
309
310         sharpsl_pm.machinfo->charge(0);
311         sharpsl_pm_led(SHARPSL_LED_OFF);
312         sharpsl_pm.charge_mode = CHRG_OFF;
313
314         schedule_delayed_work(&sharpsl_bat, 0);
315 }
316
317 static void sharpsl_charge_error(void)
318 {
319         sharpsl_pm_led(SHARPSL_LED_ERROR);
320         sharpsl_pm.machinfo->charge(0);
321         sharpsl_pm.charge_mode = CHRG_ERROR;
322 }
323
324 static void sharpsl_charge_toggle(struct work_struct *private_)
325 {
326         dev_dbg(sharpsl_pm.dev, "Toggling Charger at time: %lx\n", jiffies);
327
328         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
329                 sharpsl_charge_off();
330                 return;
331         } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
332                 sharpsl_charge_error();
333                 return;
334         }
335
336         sharpsl_pm_led(SHARPSL_LED_ON);
337         sharpsl_pm.machinfo->charge(0);
338         mdelay(SHARPSL_CHARGE_WAIT_TIME);
339         sharpsl_pm.machinfo->charge(1);
340
341         sharpsl_pm.charge_start_time = jiffies;
342 }
343
344 static void sharpsl_ac_timer(unsigned long data)
345 {
346         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
347
348         dev_dbg(sharpsl_pm.dev, "AC Status: %d\n", acin);
349
350         sharpsl_average_clear();
351         if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
352                 sharpsl_charge_on();
353         else if (sharpsl_pm.charge_mode == CHRG_ON)
354                 sharpsl_charge_off();
355
356         schedule_delayed_work(&sharpsl_bat, 0);
357 }
358
359
360 static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
361 {
362         /* Delay the event slightly to debounce */
363         /* Must be a smaller delay than the chrg_full_isr below */
364         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
365
366         return IRQ_HANDLED;
367 }
368
369 static void sharpsl_chrg_full_timer(unsigned long data)
370 {
371         dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
372
373         sharpsl_pm.full_count++;
374
375         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
376                 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
377                 if (sharpsl_pm.charge_mode == CHRG_ON)
378                         sharpsl_charge_off();
379         } else if (sharpsl_pm.full_count < 2) {
380                 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
381                 schedule_delayed_work(&toggle_charger, 0);
382         } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
383                 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
384                 schedule_delayed_work(&toggle_charger, 0);
385         } else {
386                 sharpsl_charge_off();
387                 sharpsl_pm.charge_mode = CHRG_DONE;
388                 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
389         }
390 }
391
392 /* Charging Finished Interrupt (Not present on Corgi) */
393 /* Can trigger at the same time as an AC status change so
394    delay until after that has been processed */
395 static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
396 {
397         if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
398                 return IRQ_HANDLED;
399
400         /* delay until after any ac interrupt */
401         mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
402
403         return IRQ_HANDLED;
404 }
405
406 static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
407 {
408         int is_fatal = 0;
409
410         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
411                 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
412                 is_fatal = 1;
413         }
414
415         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
416                 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
417                 is_fatal = 1;
418         }
419
420         if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
421                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
422                 apm_queue_event(APM_CRITICAL_SUSPEND);
423         }
424
425         return IRQ_HANDLED;
426 }
427
428 /*
429  * Maintain an average of the last 10 readings
430  */
431 #define SHARPSL_CNV_VALUE_NUM    10
432 static int sharpsl_ad_index;
433
434 static void sharpsl_average_clear(void)
435 {
436         sharpsl_ad_index = 0;
437 }
438
439 static int sharpsl_average_value(int ad)
440 {
441         int i, ad_val = 0;
442         static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
443
444         if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
445                 sharpsl_ad_index = 0;
446                 return ad;
447         }
448
449         sharpsl_ad[sharpsl_ad_index] = ad;
450         sharpsl_ad_index++;
451         if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
452                 for (i = 0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
453                         sharpsl_ad[i] = sharpsl_ad[i+1];
454                 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
455         }
456         for (i = 0; i < sharpsl_ad_index; i++)
457                 ad_val += sharpsl_ad[i];
458
459         return ad_val / sharpsl_ad_index;
460 }
461
462 /*
463  * Take an array of 5 integers, remove the maximum and minimum values
464  * and return the average.
465  */
466 static int get_select_val(int *val)
467 {
468         int i, j, k, temp, sum = 0;
469
470         /* Find MAX val */
471         temp = val[0];
472         j = 0;
473         for (i = 1; i < 5; i++) {
474                 if (temp < val[i]) {
475                         temp = val[i];
476                         j = i;
477                 }
478         }
479
480         /* Find MIN val */
481         temp = val[4];
482         k = 4;
483         for (i = 3; i >= 0; i--) {
484                 if (temp > val[i]) {
485                         temp = val[i];
486                         k = i;
487                 }
488         }
489
490         for (i = 0; i < 5; i++)
491                 if (i != j && i != k)
492                         sum += val[i];
493
494         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]);
495
496         return sum/3;
497 }
498
499 static int sharpsl_check_battery_temp(void)
500 {
501         int val, i, buff[5];
502
503         /* Check battery temperature */
504         for (i = 0; i < 5; i++) {
505                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
506                 sharpsl_pm.machinfo->measure_temp(1);
507                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
508                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
509                 sharpsl_pm.machinfo->measure_temp(0);
510         }
511
512         val = get_select_val(buff);
513
514         dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
515         if (val > sharpsl_pm.machinfo->charge_on_temp) {
516                 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
517                 return -1;
518         }
519
520         return 0;
521 }
522
523 #ifdef CONFIG_PM
524 static int sharpsl_check_battery_voltage(void)
525 {
526         int val, i, buff[5];
527
528         /* disable charge, enable discharge */
529         sharpsl_pm.machinfo->charge(0);
530         sharpsl_pm.machinfo->discharge(1);
531         mdelay(SHARPSL_WAIT_DISCHARGE_ON);
532
533         if (sharpsl_pm.machinfo->discharge1)
534                 sharpsl_pm.machinfo->discharge1(1);
535
536         /* Check battery voltage */
537         for (i = 0; i < 5; i++) {
538                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
539                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
540         }
541
542         if (sharpsl_pm.machinfo->discharge1)
543                 sharpsl_pm.machinfo->discharge1(0);
544
545         sharpsl_pm.machinfo->discharge(0);
546
547         val = get_select_val(buff);
548         dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
549
550         if (val < sharpsl_pm.machinfo->charge_on_volt)
551                 return -1;
552
553         return 0;
554 }
555 #endif
556
557 static int sharpsl_ac_check(void)
558 {
559         int temp, i, buff[5];
560
561         for (i = 0; i < 5; i++) {
562                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
563                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
564         }
565
566         temp = get_select_val(buff);
567         dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n", temp);
568
569         if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
570                 dev_err(sharpsl_pm.dev, "Error: AC check failed: voltage %d.\n", temp);
571                 return -1;
572         }
573
574         return 0;
575 }
576
577 #ifdef CONFIG_PM
578 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
579 {
580         sharpsl_pm.flags |= SHARPSL_SUSPENDED;
581         flush_delayed_work(&toggle_charger);
582         flush_delayed_work(&sharpsl_bat);
583
584         if (sharpsl_pm.charge_mode == CHRG_ON)
585                 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
586         else
587                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
588
589         return 0;
590 }
591
592 static int sharpsl_pm_resume(struct platform_device *pdev)
593 {
594         /* Clear the reset source indicators as they break the bootloader upon reboot */
595         RCSR = 0x0f;
596         sharpsl_average_clear();
597         sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
598         sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
599
600         return 0;
601 }
602
603 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
604 {
605         dev_dbg(sharpsl_pm.dev, "Time is: %08x\n", RCNR);
606
607         dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n", sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
608         /* not charging and AC-IN! */
609
610         if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
611                 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
612                 sharpsl_pm.charge_mode = CHRG_OFF;
613                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
614                 sharpsl_off_charge_battery();
615         }
616
617         sharpsl_pm.machinfo->presuspend();
618
619         PEDR = 0xffffffff; /* clear it */
620
621         sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
622         if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
623                 RTSR &= RTSR_ALE;
624                 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
625                 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n", RTAR);
626                 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
627         } else if (alarm_enable) {
628                 RTSR &= RTSR_ALE;
629                 RTAR = alarm_time;
630                 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n", RTAR);
631         } else {
632                 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
633         }
634
635         pxa_pm_enter(state);
636
637         sharpsl_pm.machinfo->postsuspend();
638
639         dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n", PEDR);
640 }
641
642 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
643 {
644         if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable)) {
645                 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
646                         dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
647                         corgi_goto_sleep(alarm_time, alarm_enable, state);
648                         return 1;
649                 }
650                 if (sharpsl_off_charge_battery()) {
651                         dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
652                         corgi_goto_sleep(alarm_time, alarm_enable, state);
653                         return 1;
654                 }
655                 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
656         }
657
658         if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) ||
659             (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL))) {
660                 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
661                 corgi_goto_sleep(alarm_time, alarm_enable, state);
662                 return 1;
663         }
664
665         return 0;
666 }
667
668 static int corgi_pxa_pm_enter(suspend_state_t state)
669 {
670         unsigned long alarm_time = RTAR;
671         unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
672
673         dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
674
675         corgi_goto_sleep(alarm_time, alarm_status, state);
676
677         while (corgi_enter_suspend(alarm_time, alarm_status, state))
678                 {}
679
680         if (sharpsl_pm.machinfo->earlyresume)
681                 sharpsl_pm.machinfo->earlyresume();
682
683         dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
684
685         return 0;
686 }
687
688 static int sharpsl_off_charge_error(void)
689 {
690         dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
691         sharpsl_pm.machinfo->charge(0);
692         sharpsl_pm_led(SHARPSL_LED_ERROR);
693         sharpsl_pm.charge_mode = CHRG_ERROR;
694         return 1;
695 }
696
697 /*
698  * Charging Control while suspended
699  * Return 1 - go straight to sleep
700  * Return 0 - sleep or wakeup depending on other factors
701  */
702 static int sharpsl_off_charge_battery(void)
703 {
704         int time;
705
706         dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
707
708         if (sharpsl_pm.charge_mode == CHRG_OFF) {
709                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
710
711                 /* AC Check */
712                 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
713                         return sharpsl_off_charge_error();
714
715                 /* Start Charging */
716                 sharpsl_pm_led(SHARPSL_LED_ON);
717                 sharpsl_pm.machinfo->charge(0);
718                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
719                 sharpsl_pm.machinfo->charge(1);
720
721                 sharpsl_pm.charge_mode = CHRG_ON;
722                 sharpsl_pm.full_count = 0;
723
724                 return 1;
725         } else if (sharpsl_pm.charge_mode != CHRG_ON) {
726                 return 1;
727         }
728
729         if (sharpsl_pm.full_count == 0) {
730                 int time;
731
732                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
733
734                 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
735                         return sharpsl_off_charge_error();
736
737                 sharpsl_pm.machinfo->charge(0);
738                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
739                 sharpsl_pm.machinfo->charge(1);
740                 sharpsl_pm.charge_mode = CHRG_ON;
741
742                 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
743
744                 time = RCNR;
745                 while (1) {
746                         /* Check if any wakeup event had occurred */
747                         if (sharpsl_pm.machinfo->charger_wakeup() != 0)
748                                 return 0;
749                         /* Check for timeout */
750                         if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
751                                 return 1;
752                         if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
753                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
754                                 sharpsl_pm.full_count++;
755                                 sharpsl_pm.machinfo->charge(0);
756                                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
757                                 sharpsl_pm.machinfo->charge(1);
758                                 return 1;
759                         }
760                 }
761         }
762
763         dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
764
765         mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
766
767         time = RCNR;
768         while (1) {
769                 /* Check if any wakeup event had occurred */
770                 if (sharpsl_pm.machinfo->charger_wakeup())
771                         return 0;
772                 /* Check for timeout */
773                 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
774                         if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
775                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
776                                 sharpsl_pm.full_count = 0;
777                         }
778                         sharpsl_pm.full_count++;
779                         return 1;
780                 }
781                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
782                         dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
783                         sharpsl_pm_led(SHARPSL_LED_OFF);
784                         sharpsl_pm.machinfo->charge(0);
785                         sharpsl_pm.charge_mode = CHRG_DONE;
786                         return 1;
787                 }
788         }
789 }
790 #else
791 #define sharpsl_pm_suspend      NULL
792 #define sharpsl_pm_resume       NULL
793 #endif
794
795 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
796 {
797         return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_percent);
798 }
799
800 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
801 {
802         return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_voltage);
803 }
804
805 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
806 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
807
808 extern void (*apm_get_power_status)(struct apm_power_info *);
809
810 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
811 {
812         info->ac_line_status = sharpsl_pm.battstat.ac_status;
813
814         if (sharpsl_pm.charge_mode == CHRG_ON)
815                 info->battery_status = APM_BATTERY_STATUS_CHARGING;
816         else
817                 info->battery_status = sharpsl_pm.battstat.mainbat_status;
818
819         info->battery_flag = (1 << info->battery_status);
820         info->battery_life = sharpsl_pm.battstat.mainbat_percent;
821 }
822
823 #ifdef CONFIG_PM
824 static const struct platform_suspend_ops sharpsl_pm_ops = {
825         .prepare        = pxa_pm_prepare,
826         .finish         = pxa_pm_finish,
827         .enter          = corgi_pxa_pm_enter,
828         .valid          = suspend_valid_only_mem,
829 };
830 #endif
831
832 static int sharpsl_pm_probe(struct platform_device *pdev)
833 {
834         int ret, irq;
835
836         if (!pdev->dev.platform_data)
837                 return -EINVAL;
838
839         sharpsl_pm.dev = &pdev->dev;
840         sharpsl_pm.machinfo = pdev->dev.platform_data;
841         sharpsl_pm.charge_mode = CHRG_OFF;
842         sharpsl_pm.flags = 0;
843
844         init_timer(&sharpsl_pm.ac_timer);
845         sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
846
847         init_timer(&sharpsl_pm.chrg_full_timer);
848         sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
849
850         led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
851
852         sharpsl_pm.machinfo->init();
853
854         gpio_request(sharpsl_pm.machinfo->gpio_acin, "AC IN");
855         gpio_direction_input(sharpsl_pm.machinfo->gpio_acin);
856         gpio_request(sharpsl_pm.machinfo->gpio_batfull, "Battery Full");
857         gpio_direction_input(sharpsl_pm.machinfo->gpio_batfull);
858         gpio_request(sharpsl_pm.machinfo->gpio_batlock, "Battery Lock");
859         gpio_direction_input(sharpsl_pm.machinfo->gpio_batlock);
860
861         /* Register interrupt handlers */
862         irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_acin);
863         if (request_irq(irq, sharpsl_ac_isr, IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "AC Input Detect", sharpsl_ac_isr)) {
864                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
865         }
866
867         irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock);
868         if (request_irq(irq, sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) {
869                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
870         }
871
872         if (sharpsl_pm.machinfo->gpio_fatal) {
873                 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal);
874                 if (request_irq(irq, sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) {
875                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
876                 }
877         }
878
879         if (sharpsl_pm.machinfo->batfull_irq) {
880                 /* Register interrupt handler. */
881                 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull);
882                 if (request_irq(irq, sharpsl_chrg_full_isr, IRQF_DISABLED | IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) {
883                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
884                 }
885         }
886
887         ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
888         ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
889         if (ret != 0)
890                 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
891
892         apm_get_power_status = sharpsl_apm_get_power_status;
893
894 #ifdef CONFIG_PM
895         suspend_set_ops(&sharpsl_pm_ops);
896 #endif
897
898         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
899
900         return 0;
901 }
902
903 static int sharpsl_pm_remove(struct platform_device *pdev)
904 {
905         suspend_set_ops(NULL);
906
907         device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
908         device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
909
910         led_trigger_unregister_simple(sharpsl_charge_led_trigger);
911
912         free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
913         free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
914
915         if (sharpsl_pm.machinfo->gpio_fatal)
916                 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
917
918         if (sharpsl_pm.machinfo->batfull_irq)
919                 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
920
921         gpio_free(sharpsl_pm.machinfo->gpio_batlock);
922         gpio_free(sharpsl_pm.machinfo->gpio_batfull);
923         gpio_free(sharpsl_pm.machinfo->gpio_acin);
924
925         if (sharpsl_pm.machinfo->exit)
926                 sharpsl_pm.machinfo->exit();
927
928         del_timer_sync(&sharpsl_pm.chrg_full_timer);
929         del_timer_sync(&sharpsl_pm.ac_timer);
930
931         return 0;
932 }
933
934 static struct platform_driver sharpsl_pm_driver = {
935         .probe          = sharpsl_pm_probe,
936         .remove         = sharpsl_pm_remove,
937         .suspend        = sharpsl_pm_suspend,
938         .resume         = sharpsl_pm_resume,
939         .driver         = {
940                 .name           = "sharpsl-pm",
941         },
942 };
943
944 static int sharpsl_pm_init(void)
945 {
946         return platform_driver_register(&sharpsl_pm_driver);
947 }
948
949 static void sharpsl_pm_exit(void)
950 {
951         platform_driver_unregister(&sharpsl_pm_driver);
952 }
953
954 late_initcall(sharpsl_pm_init);
955 module_exit(sharpsl_pm_exit);