[ARM] 3096/1: Add SharpSL Zaurus power and battery management core driver
[linux-2.6.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/timer.h>
19 #include <linux/init.h>
20 #include <linux/kernel.h>
21 #include <linux/apm_bios.h>
22 #include <linux/delay.h>
23 #include <linux/interrupt.h>
24 #include <linux/device.h>
25
26 #include <asm/hardware.h>
27 #include <asm/hardware/scoop.h>
28 #include <asm/mach-types.h>
29 #include <asm/irq.h>
30 #include <asm/apm.h>
31
32 #include <asm/arch/pm.h>
33 #include <asm/arch/pxa-regs.h>
34 #include <asm/arch/sharpsl.h>
35 #include "sharpsl.h"
36
37 /*
38  * Constants
39  */
40 #define SHARPSL_CHARGE_ON_TIME_INTERVAL        (msecs_to_jiffies(1*60*1000))  /* 1 min */
41 #define SHARPSL_CHARGE_FINISH_TIME             (msecs_to_jiffies(10*60*1000)) /* 10 min */
42 #define SHARPSL_BATCHK_TIME                    (msecs_to_jiffies(15*1000))    /* 15 sec */
43 #define SHARPSL_BATCHK_TIME_SUSPEND            (60*10)                        /* 10 min */
44 #define SHARPSL_WAIT_CO_TIME                   15  /* 15 sec */
45 #define SHARPSL_WAIT_DISCHARGE_ON              100 /* 100 msec */
46 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP   10  /* 10 msec */
47 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT   10  /* 10 msec */
48 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_JKVAD  10  /* 10 msec */
49 #define SHARPSL_CHARGE_WAIT_TIME               15  /* 15 msec */
50 #define SHARPSL_CHARGE_CO_CHECK_TIME           5   /* 5 msec */
51 #define SHARPSL_CHARGE_RETRY_CNT               1   /* eqv. 10 min */
52
53 #define SHARPSL_CHARGE_ON_VOLT         0x99  /* 2.9V */
54 #define SHARPSL_CHARGE_ON_TEMP         0xe0  /* 2.9V */
55 #define SHARPSL_CHARGE_ON_JKVAD_HIGH   0x9b  /* 6V */
56 #define SHARPSL_CHARGE_ON_JKVAD_LOW    0x34  /* 2V */
57 #define SHARPSL_FATAL_ACIN_VOLT        182   /* 3.45V */
58 #define SHARPSL_FATAL_NOACIN_VOLT      170   /* 3.40V */
59
60 struct battery_thresh spitz_battery_levels_acin[] = {
61         { 213, 100},
62         { 212,  98},
63         { 211,  95},
64         { 210,  93},
65         { 209,  90},
66         { 208,  88},
67         { 207,  85},
68         { 206,  83},
69         { 205,  80},
70         { 204,  78},
71         { 203,  75},
72         { 202,  73},
73         { 201,  70},
74         { 200,  68},
75         { 199,  65},
76         { 198,  63},
77         { 197,  60},
78         { 196,  58},
79         { 195,  55},
80         { 194,  53},
81         { 193,  50},
82         { 192,  48},
83         { 192,  45},
84         { 191,  43},
85         { 191,  40},
86         { 190,  38},
87         { 190,  35},
88         { 189,  33},
89         { 188,  30},
90         { 187,  28},
91         { 186,  25},
92         { 185,  23},
93         { 184,  20},
94         { 183,  18},
95         { 182,  15},
96         { 181,  13},
97         { 180,  10},
98         { 179,   8},
99         { 178,   5},
100         {   0,   0},
101 };
102
103 struct battery_thresh  spitz_battery_levels_noac[] = {
104         { 213, 100},
105         { 212,  98},
106         { 211,  95},
107         { 210,  93},
108         { 209,  90},
109         { 208,  88},
110         { 207,  85},
111         { 206,  83},
112         { 205,  80},
113         { 204,  78},
114         { 203,  75},
115         { 202,  73},
116         { 201,  70},
117         { 200,  68},
118         { 199,  65},
119         { 198,  63},
120         { 197,  60},
121         { 196,  58},
122         { 195,  55},
123         { 194,  53},
124         { 193,  50},
125         { 192,  48},
126         { 191,  45},
127         { 190,  43},
128         { 189,  40},
129         { 188,  38},
130         { 187,  35},
131         { 186,  33},
132         { 185,  30},
133         { 184,  28},
134         { 183,  25},
135         { 182,  23},
136         { 181,  20},
137         { 180,  18},
138         { 179,  15},
139         { 178,  13},
140         { 177,  10},
141         { 176,   8},
142         { 175,   5},
143         {   0,   0},
144 };
145
146 /* MAX1111 Commands */
147 #define MAXCTRL_PD0      1u << 0
148 #define MAXCTRL_PD1      1u << 1
149 #define MAXCTRL_SGL      1u << 2
150 #define MAXCTRL_UNI      1u << 3
151 #define MAXCTRL_SEL_SH   4
152 #define MAXCTRL_STR      1u << 7
153
154 /* MAX1111 Channel Definitions */
155 #define BATT_AD    4u
156 #define BATT_THM   2u
157 #define JK_VAD     6u
158
159
160 /*
161  * Prototypes
162  */
163 static int sharpsl_read_MainBattery(void);
164 static int sharpsl_off_charge_battery(void);
165 static int sharpsl_check_battery(int mode);
166 static int sharpsl_ac_check(void);
167 static int sharpsl_fatal_check(void);
168 static int sharpsl_average_value(int ad);
169 static void sharpsl_average_clear(void);
170 static void sharpsl_charge_toggle(void *private_);
171 static void sharpsl_battery_thread(void *private_);
172
173
174 /*
175  * Variables
176  */
177 struct sharpsl_pm_status sharpsl_pm;
178 DECLARE_WORK(toggle_charger, sharpsl_charge_toggle, NULL);
179 DECLARE_WORK(sharpsl_bat, sharpsl_battery_thread, NULL);
180
181
182 static int get_percentage(int voltage)
183 {
184         int i = sharpsl_pm.machinfo->bat_levels - 1;
185         struct battery_thresh *thresh;
186
187         if (sharpsl_pm.charge_mode == CHRG_ON)
188                 thresh=sharpsl_pm.machinfo->bat_levels_acin;
189         else
190                 thresh=sharpsl_pm.machinfo->bat_levels_noac;
191
192         while (i > 0 && (voltage > thresh[i].voltage))
193                 i--;
194
195         return thresh[i].percentage;
196 }
197
198 static int get_apm_status(int voltage)
199 {
200         int low_thresh, high_thresh;
201
202         if (sharpsl_pm.charge_mode == CHRG_ON) {
203                 high_thresh = sharpsl_pm.machinfo->status_high_acin;
204                 low_thresh = sharpsl_pm.machinfo->status_low_acin;
205         } else {
206                 high_thresh = sharpsl_pm.machinfo->status_high_noac;
207                 low_thresh = sharpsl_pm.machinfo->status_low_noac;
208         }
209
210         if (voltage >= high_thresh)
211                 return APM_BATTERY_STATUS_HIGH;
212         if (voltage >= low_thresh)
213                 return APM_BATTERY_STATUS_LOW;
214         return APM_BATTERY_STATUS_CRITICAL;
215 }
216
217 void sharpsl_battery_kick(void)
218 {
219         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
220 }
221 EXPORT_SYMBOL(sharpsl_battery_kick);
222
223
224 static void sharpsl_battery_thread(void *private_)
225 {
226         int voltage, percent, apm_status, i = 0;
227
228         if (!sharpsl_pm.machinfo)
229                 return;
230
231         sharpsl_pm.battstat.ac_status = (!(STATUS_AC_IN) ? APM_AC_OFFLINE : APM_AC_ONLINE);
232
233         /* Corgi cannot confirm when battery fully charged so periodically kick! */
234         if (machine_is_corgi() && (sharpsl_pm.charge_mode == CHRG_ON)
235                         && time_after(jiffies, sharpsl_pm.charge_start_time +  SHARPSL_CHARGE_ON_TIME_INTERVAL))
236                 schedule_work(&toggle_charger);
237
238         while(1) {
239                 voltage = sharpsl_read_MainBattery();
240                 if (voltage > 0) break;
241                 if (i++ > 5) {
242                         voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
243                         dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
244                         break;
245                 }
246         }
247
248         voltage = sharpsl_average_value(voltage);
249         apm_status = get_apm_status(voltage);
250         percent = get_percentage(voltage);
251
252         /* At low battery voltages, the voltage has a tendency to start
253            creeping back up so we try to avoid this here */
254         if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE) || (apm_status == APM_BATTERY_STATUS_HIGH) ||  percent <= sharpsl_pm.battstat.mainbat_percent) {
255                 sharpsl_pm.battstat.mainbat_voltage = voltage;
256                 sharpsl_pm.battstat.mainbat_status = apm_status;
257                 sharpsl_pm.battstat.mainbat_percent = percent;
258         }
259
260         dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %d\n", voltage,
261                         sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
262
263         /* If battery is low. limit backlight intensity to save power. */
264         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
265                         && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW) ||
266                         (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
267                 if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
268                         corgibl_limit_intensity(1);
269                         sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
270                 }
271         } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
272                 corgibl_limit_intensity(0);
273                 sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
274         }
275
276         /* Suspend if critical battery level */
277         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
278                         && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
279                         && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
280                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
281                 dev_err(sharpsl_pm.dev, "Fatal Off\n");
282                 apm_queue_event(APM_CRITICAL_SUSPEND);
283         }
284
285         schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
286 }
287
288 static void sharpsl_charge_on(void)
289 {
290         dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
291
292         sharpsl_pm.full_count = 0;
293         sharpsl_pm.charge_mode = CHRG_ON;
294         schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
295         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
296 }
297
298 static void sharpsl_charge_off(void)
299 {
300         dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
301
302         CHARGE_OFF();
303         CHARGE_LED_OFF();
304         sharpsl_pm.charge_mode = CHRG_OFF;
305
306         schedule_work(&sharpsl_bat);
307 }
308
309 static void sharpsl_charge_error(void)
310 {
311         CHARGE_LED_ERR();
312         CHARGE_OFF();
313         sharpsl_pm.charge_mode = CHRG_ERROR;
314 }
315
316 static void sharpsl_charge_toggle(void *private_)
317 {
318         dev_dbg(sharpsl_pm.dev, "Toogling Charger at time: %lx\n", jiffies);
319
320         if (STATUS_AC_IN == 0) {
321                 sharpsl_charge_off();
322                 return;
323         } else if ((sharpsl_check_battery(1) < 0) || (sharpsl_ac_check() < 0)) {
324                 sharpsl_charge_error();
325                 return;
326         }
327
328         CHARGE_LED_ON();
329         CHARGE_OFF();
330         mdelay(SHARPSL_CHARGE_WAIT_TIME);
331         CHARGE_ON();
332
333         sharpsl_pm.charge_start_time = jiffies;
334 }
335
336 static void sharpsl_ac_timer(unsigned long data)
337 {
338         int acin = STATUS_AC_IN;
339
340         dev_dbg(sharpsl_pm.dev, "AC Status: %d\n",acin);
341
342         sharpsl_average_clear();
343         if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
344                 sharpsl_charge_on();
345         else if (sharpsl_pm.charge_mode == CHRG_ON)
346                 sharpsl_charge_off();
347
348         schedule_work(&sharpsl_bat);
349 }
350
351
352 static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id, struct pt_regs *fp)
353 {
354         /* Delay the event slightly to debounce */
355         /* Must be a smaller delay than the chrg_full_isr below */
356         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
357
358         return IRQ_HANDLED;
359 }
360
361 static void sharpsl_chrg_full_timer(unsigned long data)
362 {
363         dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
364
365         sharpsl_pm.full_count++;
366
367         if (STATUS_AC_IN == 0) {
368                 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
369                 if (sharpsl_pm.charge_mode == CHRG_ON)
370                         sharpsl_charge_off();
371         } else if (sharpsl_pm.full_count < 2) {
372                 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
373                 schedule_work(&toggle_charger);
374         } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
375                 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
376                 schedule_work(&toggle_charger);
377         } else {
378                 sharpsl_charge_off();
379                 sharpsl_pm.charge_mode = CHRG_DONE;
380                 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
381         }
382 }
383
384 /* Charging Finished Interrupt (Not present on Corgi) */
385 /* Can trigger at the same time as an AC staus change so
386    delay until after that has been processed */
387 static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id, struct pt_regs *fp)
388 {
389         if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
390                 return IRQ_HANDLED;
391
392         /* delay until after any ac interrupt */
393         mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
394
395         return IRQ_HANDLED;
396 }
397
398 static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id, struct pt_regs *fp)
399 {
400         int is_fatal = 0;
401
402         if (STATUS_BATT_LOCKED == 0) {
403                 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
404                 is_fatal = 1;
405         }
406
407         if (sharpsl_pm.machinfo->gpio_fatal && (STATUS_FATAL == 0)) {
408                 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
409                 is_fatal = 1;
410         }
411
412         if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
413                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
414                 apm_queue_event(APM_CRITICAL_SUSPEND);
415         }
416
417         return IRQ_HANDLED;
418 }
419
420 /*
421  * Maintain an average of the last 10 readings
422  */
423 #define SHARPSL_CNV_VALUE_NUM    10
424 static int sharpsl_ad_index;
425
426 static void sharpsl_average_clear(void)
427 {
428         sharpsl_ad_index = 0;
429 }
430
431 static int sharpsl_average_value(int ad)
432 {
433         int i, ad_val = 0;
434         static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
435
436         if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
437                 sharpsl_ad_index = 0;
438                 return ad;
439         }
440
441         sharpsl_ad[sharpsl_ad_index] = ad;
442         sharpsl_ad_index++;
443         if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
444                 for (i=0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
445                         sharpsl_ad[i] = sharpsl_ad[i+1];
446                 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
447         }
448         for (i=0; i < sharpsl_ad_index; i++)
449                 ad_val += sharpsl_ad[i];
450
451         return (ad_val / sharpsl_ad_index);
452 }
453
454
455 /*
456  * Read MAX1111 ADC
457  */
458 static int read_max1111(int channel)
459 {
460         return corgi_ssp_max1111_get((channel << MAXCTRL_SEL_SH) | MAXCTRL_PD0 | MAXCTRL_PD1
461                         | MAXCTRL_SGL | MAXCTRL_UNI | MAXCTRL_STR);
462 }
463
464 static int sharpsl_read_MainBattery(void)
465 {
466         return read_max1111(BATT_AD);
467 }
468
469 static int sharpsl_read_Temp(void)
470 {
471         int temp;
472
473         sharpsl_pm.machinfo->measure_temp(1);
474
475         mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
476         temp = read_max1111(BATT_THM);
477
478         sharpsl_pm.machinfo->measure_temp(0);
479
480         return temp;
481 }
482
483 static int sharpsl_read_jkvad(void)
484 {
485         return read_max1111(JK_VAD);
486 }
487
488 /*
489  * Take an array of 5 integers, remove the maximum and minimum values
490  * and return the average.
491  */
492 static int get_select_val(int *val)
493 {
494         int i, j, k, temp, sum = 0;
495
496         /* Find MAX val */
497         temp = val[0];
498         j=0;
499         for (i=1; i<5; i++) {
500                 if (temp < val[i]) {
501                         temp = val[i];
502                         j = i;
503                 }
504         }
505
506         /* Find MIN val */
507         temp = val[4];
508         k=4;
509         for (i=3; i>=0; i--) {
510                 if (temp > val[i]) {
511                         temp = val[i];
512                         k = i;
513                 }
514         }
515
516         for (i=0; i<5; i++)
517                 if (i != j && i != k )
518                         sum += val[i];
519
520         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]);
521
522         return (sum/3);
523 }
524
525 /*  mode 0 - Check temperature and voltage
526  *       1 - Check temperature only */
527 static int sharpsl_check_battery(int mode)
528 {
529         int val, i, buff[5];
530
531         /* Check battery temperature */
532         for (i=0; i<5; i++) {
533                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
534                 buff[i] = sharpsl_read_Temp();
535         }
536
537         val = get_select_val(buff);
538
539         dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
540         if (val > SHARPSL_CHARGE_ON_TEMP)
541                 return -1;
542         if (mode == 1)
543                 return 0;
544
545         /* disable charge, enable discharge */
546         CHARGE_OFF();
547         DISCHARGE_ON();
548         mdelay(SHARPSL_WAIT_DISCHARGE_ON);
549
550         if (sharpsl_pm.machinfo->discharge1)
551                 sharpsl_pm.machinfo->discharge1(1);
552
553         /* Check battery voltage */
554         for (i=0; i<5; i++) {
555                 buff[i] = sharpsl_read_MainBattery();
556                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
557         }
558
559         if (sharpsl_pm.machinfo->discharge1)
560                 sharpsl_pm.machinfo->discharge1(0);
561
562         DISCHARGE_OFF();
563
564         val = get_select_val(buff);
565         dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
566
567         if (val < SHARPSL_CHARGE_ON_VOLT)
568                 return -1;
569
570         return 0;
571 }
572
573 static int sharpsl_ac_check(void)
574 {
575         int temp, i, buff[5];
576
577         for (i=0; i<5; i++) {
578                 buff[i] = sharpsl_read_jkvad();
579                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_JKVAD);
580         }
581
582         temp = get_select_val(buff);
583         dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n",temp);
584
585         if ((temp > SHARPSL_CHARGE_ON_JKVAD_HIGH) || (temp < SHARPSL_CHARGE_ON_JKVAD_LOW)) {
586                 dev_err(sharpsl_pm.dev, "Error: AC check failed.\n");
587                 return -1;
588         }
589
590         return 0;
591 }
592
593 #ifdef CONFIG_PM
594 static int sharpsl_pm_suspend(struct device *dev, pm_message_t state)
595 {
596         sharpsl_pm.flags |= SHARPSL_SUSPENDED;
597         flush_scheduled_work();
598
599         if (sharpsl_pm.charge_mode == CHRG_ON)
600                 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
601         else
602                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
603
604         return 0;
605 }
606
607 static int sharpsl_pm_resume(struct device *dev)
608 {
609         /* Clear the reset source indicators as they break the bootloader upon reboot */
610         RCSR = 0x0f;
611         sharpsl_average_clear();
612         sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
613         sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
614
615         return 0;
616 }
617
618 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
619 {
620         dev_dbg(sharpsl_pm.dev, "Time is: %08x\n",RCNR);
621
622         dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n",sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
623         /* not charging and AC-IN! */
624
625         if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (STATUS_AC_IN != 0)) {
626                 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
627                 sharpsl_pm.charge_mode = CHRG_OFF;
628                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
629                 sharpsl_off_charge_battery();
630         }
631
632         sharpsl_pm.machinfo->presuspend();
633
634         PEDR = 0xffffffff; /* clear it */
635
636         sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
637         if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
638                 RTSR &= RTSR_ALE;
639                 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
640                 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n",RTAR);
641                 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
642         } else if (alarm_enable) {
643                 RTSR &= RTSR_ALE;
644                 RTAR = alarm_time;
645                 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n",RTAR);
646         } else {
647                 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
648         }
649
650         pxa_pm_enter(state);
651
652         sharpsl_pm.machinfo->postsuspend();
653
654         dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n",PEDR);
655 }
656
657 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
658 {
659         if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable) )
660         {
661                 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
662                         dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
663                         corgi_goto_sleep(alarm_time, alarm_enable, state);
664                         return 1;
665                 }
666                 if(sharpsl_off_charge_battery()) {
667                         dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
668                         corgi_goto_sleep(alarm_time, alarm_enable, state);
669                         return 1;
670                 }
671                 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
672         }
673
674         if ((STATUS_BATT_LOCKED == 0) || (sharpsl_fatal_check() < 0) )
675         {
676                 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
677                 corgi_goto_sleep(alarm_time, alarm_enable, state);
678                 return 1;
679         }
680
681         return 0;
682 }
683
684 static int corgi_pxa_pm_enter(suspend_state_t state)
685 {
686         unsigned long alarm_time = RTAR;
687         unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
688
689         dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
690
691         corgi_goto_sleep(alarm_time, alarm_status, state);
692
693         while (corgi_enter_suspend(alarm_time,alarm_status,state))
694                 {}
695
696         dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
697
698         return 0;
699 }
700 #endif
701
702
703 /*
704  * Check for fatal battery errors
705  * Fatal returns -1
706  */
707 static int sharpsl_fatal_check(void)
708 {
709         int buff[5], temp, i, acin;
710
711         dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
712
713         /* Check AC-Adapter */
714         acin = STATUS_AC_IN;
715
716         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
717                 CHARGE_OFF();
718                 udelay(100);
719                 DISCHARGE_ON(); /* enable discharge */
720                 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
721         }
722
723         if (sharpsl_pm.machinfo->discharge1)
724                 sharpsl_pm.machinfo->discharge1(1);
725
726         /* Check battery : check inserting battery ? */
727         for (i=0; i<5; i++) {
728                 buff[i] = sharpsl_read_MainBattery();
729                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
730         }
731
732         if (sharpsl_pm.machinfo->discharge1)
733                 sharpsl_pm.machinfo->discharge1(0);
734
735         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
736                 udelay(100);
737                 CHARGE_ON();
738                 DISCHARGE_OFF();
739         }
740
741         temp = get_select_val(buff);
742         dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check: acin: %d, discharge voltage: %d, no discharge: %d\n", acin, temp, sharpsl_read_MainBattery());
743
744         if ((acin && (temp < SHARPSL_FATAL_ACIN_VOLT)) ||
745                         (!acin && (temp < SHARPSL_FATAL_NOACIN_VOLT)))
746                 return -1;
747         return 0;
748 }
749
750 static int sharpsl_off_charge_error(void)
751 {
752         dev_err(sharpsl_pm.dev, "Offline Charger: Error occured.\n");
753         CHARGE_OFF();
754         CHARGE_LED_ERR();
755         sharpsl_pm.charge_mode = CHRG_ERROR;
756         return 1;
757 }
758
759 /*
760  * Charging Control while suspended
761  * Return 1 - go straight to sleep
762  * Return 0 - sleep or wakeup depending on other factors
763  */
764 static int sharpsl_off_charge_battery(void)
765 {
766         int time;
767
768         dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
769
770         if (sharpsl_pm.charge_mode == CHRG_OFF) {
771                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
772
773                 /* AC Check */
774                 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery(1) < 0))
775                         return sharpsl_off_charge_error();
776
777                 /* Start Charging */
778                 CHARGE_LED_ON();
779                 CHARGE_OFF();
780                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
781                 CHARGE_ON();
782
783                 sharpsl_pm.charge_mode = CHRG_ON;
784                 sharpsl_pm.full_count = 0;
785
786                 return 1;
787         } else if (sharpsl_pm.charge_mode != CHRG_ON) {
788                 return 1;
789         }
790
791         if (sharpsl_pm.full_count == 0) {
792                 int time;
793
794                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
795
796                 if (sharpsl_check_battery(0) < 0)
797                         return sharpsl_off_charge_error();
798
799                 CHARGE_OFF();
800                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
801                 CHARGE_ON();
802                 sharpsl_pm.charge_mode = CHRG_ON;
803
804                 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
805
806                 time = RCNR;
807                 while(1) {
808                         /* Check if any wakeup event had occured */
809                         if (sharpsl_pm.machinfo->charger_wakeup() != 0)
810                                 return 0;
811                         /* Check for timeout */
812                         if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
813                                 return 1;
814                         if (STATUS_CHRG_FULL) {
815                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occured. Retrying to check\n");
816                                 sharpsl_pm.full_count++;
817                                 CHARGE_OFF();
818                                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
819                                 CHARGE_ON();
820                                 return 1;
821                         }
822                 }
823         }
824
825         dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
826
827         mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
828
829         time = RCNR;
830         while(1) {
831                 /* Check if any wakeup event had occured */
832                 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
833                         return 0;
834                 /* Check for timeout */
835                 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
836                         if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
837                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
838                                 sharpsl_pm.full_count = 0;
839                         }
840                         sharpsl_pm.full_count++;
841                         return 1;
842                 }
843                 if (STATUS_CHRG_FULL) {
844                         dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
845                         CHARGE_LED_OFF();
846                         CHARGE_OFF();
847                         sharpsl_pm.charge_mode = CHRG_DONE;
848                         return 1;
849                 }
850         }
851 }
852
853
854 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
855 {
856         return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_percent);
857 }
858
859 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
860 {
861         return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_voltage);
862 }
863
864 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
865 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
866
867 extern void (*apm_get_power_status)(struct apm_power_info *);
868
869 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
870 {
871         info->ac_line_status = sharpsl_pm.battstat.ac_status;
872
873         if (sharpsl_pm.charge_mode == CHRG_ON)
874                 info->battery_status = APM_BATTERY_STATUS_CHARGING;
875         else
876                 info->battery_status = sharpsl_pm.battstat.mainbat_status;
877
878         info->battery_flag = (1 << info->battery_status);
879         info->battery_life = sharpsl_pm.battstat.mainbat_percent;
880 }
881
882 static struct pm_ops sharpsl_pm_ops = {
883         .pm_disk_mode   = PM_DISK_FIRMWARE,
884         .prepare        = pxa_pm_prepare,
885         .enter          = corgi_pxa_pm_enter,
886         .finish         = pxa_pm_finish,
887 };
888
889 static int __init sharpsl_pm_probe(struct device *dev)
890 {
891         if (!dev->platform_data)
892                 return -EINVAL;
893
894         sharpsl_pm.dev = dev;
895         sharpsl_pm.machinfo = dev->platform_data;
896         sharpsl_pm.charge_mode = CHRG_OFF;
897         sharpsl_pm.flags = 0;
898
899         sharpsl_pm.machinfo->init();
900
901         init_timer(&sharpsl_pm.ac_timer);
902         sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
903
904         init_timer(&sharpsl_pm.chrg_full_timer);
905         sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
906
907         pxa_gpio_mode(sharpsl_pm.machinfo->gpio_acin | GPIO_IN);
908         pxa_gpio_mode(sharpsl_pm.machinfo->gpio_batfull | GPIO_IN);
909         pxa_gpio_mode(sharpsl_pm.machinfo->gpio_batlock | GPIO_IN);
910
911         /* Register interrupt handlers */
912         if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr, SA_INTERRUPT, "AC Input Detect", sharpsl_ac_isr)) {
913                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin));
914         }
915         else set_irq_type(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin),IRQT_BOTHEDGE);
916
917         if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr, SA_INTERRUPT, "Battery Cover", sharpsl_fatal_isr)) {
918                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock));
919         }
920         else set_irq_type(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock),IRQT_FALLING);
921
922         if (sharpsl_pm.machinfo->gpio_fatal) {
923                 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr, SA_INTERRUPT, "Fatal Battery", sharpsl_fatal_isr)) {
924                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal));
925                 }
926                 else set_irq_type(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal),IRQT_FALLING);
927         }
928
929         if (!machine_is_corgi())
930         {
931                 /* Register interrupt handler. */
932                 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr, SA_INTERRUPT, "CO", sharpsl_chrg_full_isr)) {
933                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull));
934                 }
935                 else set_irq_type(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull),IRQT_RISING);
936         }
937
938         device_create_file(dev, &dev_attr_battery_percentage);
939         device_create_file(dev, &dev_attr_battery_voltage);
940
941         apm_get_power_status = sharpsl_apm_get_power_status;
942
943         pm_set_ops(&sharpsl_pm_ops);
944
945         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
946
947         return 0;
948 }
949
950 static int sharpsl_pm_remove(struct device *dev)
951 {
952         pm_set_ops(NULL);
953
954         device_remove_file(dev, &dev_attr_battery_percentage);
955         device_remove_file(dev, &dev_attr_battery_voltage);
956
957         free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
958         free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
959
960         if (sharpsl_pm.machinfo->gpio_fatal)
961                 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
962
963         if (!machine_is_corgi())
964                 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
965
966         del_timer_sync(&sharpsl_pm.chrg_full_timer);
967         del_timer_sync(&sharpsl_pm.ac_timer);
968
969         return 0;
970 }
971
972 static struct device_driver sharpsl_pm_driver = {
973         .name           = "sharpsl-pm",
974         .bus            = &platform_bus_type,
975         .probe          = sharpsl_pm_probe,
976         .remove         = sharpsl_pm_remove,
977         .suspend        = sharpsl_pm_suspend,
978         .resume         = sharpsl_pm_resume,
979 };
980
981 static int __devinit sharpsl_pm_init(void)
982 {
983         return driver_register(&sharpsl_pm_driver);
984 }
985
986 static void sharpsl_pm_exit(void)
987 {
988         driver_unregister(&sharpsl_pm_driver);
989 }
990
991 late_initcall(sharpsl_pm_init);
992 module_exit(sharpsl_pm_exit);