1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Battery and Power Management code for the Sharp SL-C7xx and SL-Cxx00
4 * series of PDAs
5 *
6 * Copyright (c) 2004-2005 Richard Purdie
7 *
8 * Based on code written by Sharp for 2.4 kernels
9 */
10
11 #undef DEBUG
12
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/interrupt.h>
16 #include <linux/platform_device.h>
17 #include <linux/apm-emulation.h>
18 #include <linux/timer.h>
19 #include <linux/delay.h>
20 #include <linux/leds.h>
21 #include <linux/suspend.h>
22 #include <linux/gpio.h>
23 #include <linux/io.h>
24
25 #include <asm/mach-types.h>
26 #include "pm.h"
27 #include "pxa2xx-regs.h"
28 #include "regs-rtc.h"
29 #include "sharpsl_pm.h"
30
31 /*
32 * Constants
33 */
34 #define SHARPSL_CHARGE_ON_TIME_INTERVAL (msecs_to_jiffies(1*60*1000)) /* 1 min */
35 #define SHARPSL_CHARGE_FINISH_TIME (msecs_to_jiffies(10*60*1000)) /* 10 min */
36 #define SHARPSL_BATCHK_TIME (msecs_to_jiffies(15*1000)) /* 15 sec */
37 #define SHARPSL_BATCHK_TIME_SUSPEND (60*10) /* 10 min */
38
39 #define SHARPSL_WAIT_CO_TIME 15 /* 15 sec */
40 #define SHARPSL_WAIT_DISCHARGE_ON 100 /* 100 msec */
41 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP 10 /* 10 msec */
42 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT 10 /* 10 msec */
43 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN 10 /* 10 msec */
44 #define SHARPSL_CHARGE_WAIT_TIME 15 /* 15 msec */
45 #define SHARPSL_CHARGE_CO_CHECK_TIME 5 /* 5 msec */
46 #define SHARPSL_CHARGE_RETRY_CNT 1 /* eqv. 10 min */
47
48 /*
49 * Prototypes
50 */
51 #ifdef CONFIG_PM
52 static int sharpsl_off_charge_battery(void);
53 static int sharpsl_check_battery_voltage(void);
54 #endif
55 static int sharpsl_check_battery_temp(void);
56 static int sharpsl_ac_check(void);
57 static int sharpsl_average_value(int ad);
58 static void sharpsl_average_clear(void);
59 static void sharpsl_charge_toggle(struct work_struct *private_);
60 static void sharpsl_battery_thread(struct work_struct *private_);
61
62
63 /*
64 * Variables
65 */
66 struct sharpsl_pm_status sharpsl_pm;
67 static DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
68 static DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
69 DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
70
71
72
73 struct battery_thresh sharpsl_battery_levels_acin[] = {
74 { 213, 100},
75 { 212, 98},
76 { 211, 95},
77 { 210, 93},
78 { 209, 90},
79 { 208, 88},
80 { 207, 85},
81 { 206, 83},
82 { 205, 80},
83 { 204, 78},
84 { 203, 75},
85 { 202, 73},
86 { 201, 70},
87 { 200, 68},
88 { 199, 65},
89 { 198, 63},
90 { 197, 60},
91 { 196, 58},
92 { 195, 55},
93 { 194, 53},
94 { 193, 50},
95 { 192, 48},
96 { 192, 45},
97 { 191, 43},
98 { 191, 40},
99 { 190, 38},
100 { 190, 35},
101 { 189, 33},
102 { 188, 30},
103 { 187, 28},
104 { 186, 25},
105 { 185, 23},
106 { 184, 20},
107 { 183, 18},
108 { 182, 15},
109 { 181, 13},
110 { 180, 10},
111 { 179, 8},
112 { 178, 5},
113 { 0, 0},
114 };
115
116 struct battery_thresh sharpsl_battery_levels_noac[] = {
117 { 213, 100},
118 { 212, 98},
119 { 211, 95},
120 { 210, 93},
121 { 209, 90},
122 { 208, 88},
123 { 207, 85},
124 { 206, 83},
125 { 205, 80},
126 { 204, 78},
127 { 203, 75},
128 { 202, 73},
129 { 201, 70},
130 { 200, 68},
131 { 199, 65},
132 { 198, 63},
133 { 197, 60},
134 { 196, 58},
135 { 195, 55},
136 { 194, 53},
137 { 193, 50},
138 { 192, 48},
139 { 191, 45},
140 { 190, 43},
141 { 189, 40},
142 { 188, 38},
143 { 187, 35},
144 { 186, 33},
145 { 185, 30},
146 { 184, 28},
147 { 183, 25},
148 { 182, 23},
149 { 181, 20},
150 { 180, 18},
151 { 179, 15},
152 { 178, 13},
153 { 177, 10},
154 { 176, 8},
155 { 175, 5},
156 { 0, 0},
157 };
158
159 /* MAX1111 Commands */
160 #define MAXCTRL_PD0 (1u << 0)
161 #define MAXCTRL_PD1 (1u << 1)
162 #define MAXCTRL_SGL (1u << 2)
163 #define MAXCTRL_UNI (1u << 3)
164 #define MAXCTRL_SEL_SH 4
165 #define MAXCTRL_STR (1u << 7)
166
167 extern int max1111_read_channel(int);
168 /*
169 * Read MAX1111 ADC
170 */
sharpsl_pm_pxa_read_max1111(int channel)171 int sharpsl_pm_pxa_read_max1111(int channel)
172 {
173 /* max1111 accepts channels from 0-3, however,
174 * it is encoded from 0-7 here in the code.
175 */
176 return max1111_read_channel(channel >> 1);
177 }
178
get_percentage(int voltage)179 static int get_percentage(int voltage)
180 {
181 int i = sharpsl_pm.machinfo->bat_levels - 1;
182 int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
183 struct battery_thresh *thresh;
184
185 if (sharpsl_pm.charge_mode == CHRG_ON)
186 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
187 else
188 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
189
190 while (i > 0 && (voltage > thresh[i].voltage))
191 i--;
192
193 return thresh[i].percentage;
194 }
195
get_apm_status(int voltage)196 static int get_apm_status(int voltage)
197 {
198 int low_thresh, high_thresh;
199
200 if (sharpsl_pm.charge_mode == CHRG_ON) {
201 high_thresh = sharpsl_pm.machinfo->status_high_acin;
202 low_thresh = sharpsl_pm.machinfo->status_low_acin;
203 } else {
204 high_thresh = sharpsl_pm.machinfo->status_high_noac;
205 low_thresh = sharpsl_pm.machinfo->status_low_noac;
206 }
207
208 if (voltage >= high_thresh)
209 return APM_BATTERY_STATUS_HIGH;
210 if (voltage >= low_thresh)
211 return APM_BATTERY_STATUS_LOW;
212 return APM_BATTERY_STATUS_CRITICAL;
213 }
214
sharpsl_battery_kick(void)215 void sharpsl_battery_kick(void)
216 {
217 schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
218 }
219 EXPORT_SYMBOL(sharpsl_battery_kick);
220
221
sharpsl_battery_thread(struct work_struct * private_)222 static void sharpsl_battery_thread(struct work_struct *private_)
223 {
224 int voltage, percent, apm_status, i;
225
226 if (!sharpsl_pm.machinfo)
227 return;
228
229 sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
230
231 /* Corgi cannot confirm when battery fully charged so periodically kick! */
232 if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
233 && time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_ON_TIME_INTERVAL))
234 schedule_delayed_work(&toggle_charger, 0);
235
236 for (i = 0; i < 5; i++) {
237 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
238 if (voltage > 0)
239 break;
240 }
241 if (voltage <= 0) {
242 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
243 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
244 }
245
246 voltage = sharpsl_average_value(voltage);
247 apm_status = get_apm_status(voltage);
248 percent = get_percentage(voltage);
249
250 /* At low battery voltages, the voltage has a tendency to start
251 creeping back up so we try to avoid this here */
252 if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE)
253 || (apm_status == APM_BATTERY_STATUS_HIGH)
254 || 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: %ld\n", voltage,
261 sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
262
263 /* Suspend if critical battery level */
264 if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
265 && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
266 && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
267 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
268 dev_err(sharpsl_pm.dev, "Fatal Off\n");
269 apm_queue_event(APM_CRITICAL_SUSPEND);
270 }
271
272 schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
273 }
274
sharpsl_pm_led(int val)275 void sharpsl_pm_led(int val)
276 {
277 if (val == SHARPSL_LED_ERROR) {
278 dev_err(sharpsl_pm.dev, "Charging Error!\n");
279 } else if (val == SHARPSL_LED_ON) {
280 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
281 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
282 } else {
283 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
284 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
285 }
286 }
287
sharpsl_charge_on(void)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
sharpsl_charge_off(void)298 static void sharpsl_charge_off(void)
299 {
300 dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
301
302 sharpsl_pm.machinfo->charge(0);
303 sharpsl_pm_led(SHARPSL_LED_OFF);
304 sharpsl_pm.charge_mode = CHRG_OFF;
305
306 schedule_delayed_work(&sharpsl_bat, 0);
307 }
308
sharpsl_charge_error(void)309 static void sharpsl_charge_error(void)
310 {
311 sharpsl_pm_led(SHARPSL_LED_ERROR);
312 sharpsl_pm.machinfo->charge(0);
313 sharpsl_pm.charge_mode = CHRG_ERROR;
314 }
315
sharpsl_charge_toggle(struct work_struct * private_)316 static void sharpsl_charge_toggle(struct work_struct *private_)
317 {
318 dev_dbg(sharpsl_pm.dev, "Toggling Charger at time: %lx\n", jiffies);
319
320 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
321 sharpsl_charge_off();
322 return;
323 } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
324 sharpsl_charge_error();
325 return;
326 }
327
328 sharpsl_pm_led(SHARPSL_LED_ON);
329 sharpsl_pm.machinfo->charge(0);
330 mdelay(SHARPSL_CHARGE_WAIT_TIME);
331 sharpsl_pm.machinfo->charge(1);
332
333 sharpsl_pm.charge_start_time = jiffies;
334 }
335
sharpsl_ac_timer(struct timer_list * unused)336 static void sharpsl_ac_timer(struct timer_list *unused)
337 {
338 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
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_delayed_work(&sharpsl_bat, 0);
349 }
350
351
sharpsl_ac_isr(int irq,void * dev_id)352 static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
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
sharpsl_chrg_full_timer(struct timer_list * unused)361 static void sharpsl_chrg_full_timer(struct timer_list *unused)
362 {
363 dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
364
365 sharpsl_pm.full_count++;
366
367 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
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_delayed_work(&toggle_charger, 0);
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_delayed_work(&toggle_charger, 0);
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 status change so
386 delay until after that has been processed */
sharpsl_chrg_full_isr(int irq,void * dev_id)387 static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
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
sharpsl_fatal_isr(int irq,void * dev_id)398 static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
399 {
400 int is_fatal = 0;
401
402 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
403 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
404 is_fatal = 1;
405 }
406
407 if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
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
sharpsl_average_clear(void)426 static void sharpsl_average_clear(void)
427 {
428 sharpsl_ad_index = 0;
429 }
430
sharpsl_average_value(int ad)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 * Take an array of 5 integers, remove the maximum and minimum values
456 * and return the average.
457 */
get_select_val(int * val)458 static int get_select_val(int *val)
459 {
460 int i, j, k, temp, sum = 0;
461
462 /* Find MAX val */
463 temp = val[0];
464 j = 0;
465 for (i = 1; i < 5; i++) {
466 if (temp < val[i]) {
467 temp = val[i];
468 j = i;
469 }
470 }
471
472 /* Find MIN val */
473 temp = val[4];
474 k = 4;
475 for (i = 3; i >= 0; i--) {
476 if (temp > val[i]) {
477 temp = val[i];
478 k = i;
479 }
480 }
481
482 for (i = 0; i < 5; i++)
483 if (i != j && i != k)
484 sum += val[i];
485
486 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]);
487
488 return sum/3;
489 }
490
sharpsl_check_battery_temp(void)491 static int sharpsl_check_battery_temp(void)
492 {
493 int val, i, buff[5];
494
495 /* Check battery temperature */
496 for (i = 0; i < 5; i++) {
497 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
498 sharpsl_pm.machinfo->measure_temp(1);
499 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
500 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
501 sharpsl_pm.machinfo->measure_temp(0);
502 }
503
504 val = get_select_val(buff);
505
506 dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
507 if (val > sharpsl_pm.machinfo->charge_on_temp) {
508 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
509 return -1;
510 }
511
512 return 0;
513 }
514
515 #ifdef CONFIG_PM
sharpsl_check_battery_voltage(void)516 static int sharpsl_check_battery_voltage(void)
517 {
518 int val, i, buff[5];
519
520 /* disable charge, enable discharge */
521 sharpsl_pm.machinfo->charge(0);
522 sharpsl_pm.machinfo->discharge(1);
523 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
524
525 if (sharpsl_pm.machinfo->discharge1)
526 sharpsl_pm.machinfo->discharge1(1);
527
528 /* Check battery voltage */
529 for (i = 0; i < 5; i++) {
530 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
531 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
532 }
533
534 if (sharpsl_pm.machinfo->discharge1)
535 sharpsl_pm.machinfo->discharge1(0);
536
537 sharpsl_pm.machinfo->discharge(0);
538
539 val = get_select_val(buff);
540 dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
541
542 if (val < sharpsl_pm.machinfo->charge_on_volt)
543 return -1;
544
545 return 0;
546 }
547 #endif
548
sharpsl_ac_check(void)549 static int sharpsl_ac_check(void)
550 {
551 int temp, i, buff[5];
552
553 for (i = 0; i < 5; i++) {
554 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
555 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
556 }
557
558 temp = get_select_val(buff);
559 dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n", temp);
560
561 if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
562 dev_err(sharpsl_pm.dev, "Error: AC check failed: voltage %d.\n", temp);
563 return -1;
564 }
565
566 return 0;
567 }
568
569 #ifdef CONFIG_PM
sharpsl_pm_suspend(struct platform_device * pdev,pm_message_t state)570 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
571 {
572 sharpsl_pm.flags |= SHARPSL_SUSPENDED;
573 flush_delayed_work(&toggle_charger);
574 flush_delayed_work(&sharpsl_bat);
575
576 if (sharpsl_pm.charge_mode == CHRG_ON)
577 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
578 else
579 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
580
581 return 0;
582 }
583
sharpsl_pm_resume(struct platform_device * pdev)584 static int sharpsl_pm_resume(struct platform_device *pdev)
585 {
586 /* Clear the reset source indicators as they break the bootloader upon reboot */
587 RCSR = 0x0f;
588 sharpsl_average_clear();
589 sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
590 sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
591
592 return 0;
593 }
594
corgi_goto_sleep(unsigned long alarm_time,unsigned int alarm_enable,suspend_state_t state)595 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
596 {
597 dev_dbg(sharpsl_pm.dev, "Time is: %08x\n", RCNR);
598
599 dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n", sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
600 /* not charging and AC-IN! */
601
602 if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
603 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
604 sharpsl_pm.charge_mode = CHRG_OFF;
605 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
606 sharpsl_off_charge_battery();
607 }
608
609 sharpsl_pm.machinfo->presuspend();
610
611 PEDR = 0xffffffff; /* clear it */
612
613 sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
614 if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
615 RTSR &= RTSR_ALE;
616 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
617 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n", RTAR);
618 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
619 } else if (alarm_enable) {
620 RTSR &= RTSR_ALE;
621 RTAR = alarm_time;
622 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n", RTAR);
623 } else {
624 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
625 }
626
627 pxa_pm_enter(state);
628
629 sharpsl_pm.machinfo->postsuspend();
630
631 dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n", PEDR);
632 }
633
corgi_enter_suspend(unsigned long alarm_time,unsigned int alarm_enable,suspend_state_t state)634 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
635 {
636 if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable)) {
637 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
638 dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
639 corgi_goto_sleep(alarm_time, alarm_enable, state);
640 return 1;
641 }
642 if (sharpsl_off_charge_battery()) {
643 dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
644 corgi_goto_sleep(alarm_time, alarm_enable, state);
645 return 1;
646 }
647 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
648 }
649
650 if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) ||
651 (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL))) {
652 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
653 corgi_goto_sleep(alarm_time, alarm_enable, state);
654 return 1;
655 }
656
657 return 0;
658 }
659
corgi_pxa_pm_enter(suspend_state_t state)660 static int corgi_pxa_pm_enter(suspend_state_t state)
661 {
662 unsigned long alarm_time = RTAR;
663 unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
664
665 dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
666
667 corgi_goto_sleep(alarm_time, alarm_status, state);
668
669 while (corgi_enter_suspend(alarm_time, alarm_status, state))
670 {}
671
672 if (sharpsl_pm.machinfo->earlyresume)
673 sharpsl_pm.machinfo->earlyresume();
674
675 dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
676
677 return 0;
678 }
679
sharpsl_off_charge_error(void)680 static int sharpsl_off_charge_error(void)
681 {
682 dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
683 sharpsl_pm.machinfo->charge(0);
684 sharpsl_pm_led(SHARPSL_LED_ERROR);
685 sharpsl_pm.charge_mode = CHRG_ERROR;
686 return 1;
687 }
688
689 /*
690 * Charging Control while suspended
691 * Return 1 - go straight to sleep
692 * Return 0 - sleep or wakeup depending on other factors
693 */
sharpsl_off_charge_battery(void)694 static int sharpsl_off_charge_battery(void)
695 {
696 int time;
697
698 dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
699
700 if (sharpsl_pm.charge_mode == CHRG_OFF) {
701 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
702
703 /* AC Check */
704 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
705 return sharpsl_off_charge_error();
706
707 /* Start Charging */
708 sharpsl_pm_led(SHARPSL_LED_ON);
709 sharpsl_pm.machinfo->charge(0);
710 mdelay(SHARPSL_CHARGE_WAIT_TIME);
711 sharpsl_pm.machinfo->charge(1);
712
713 sharpsl_pm.charge_mode = CHRG_ON;
714 sharpsl_pm.full_count = 0;
715
716 return 1;
717 } else if (sharpsl_pm.charge_mode != CHRG_ON) {
718 return 1;
719 }
720
721 if (sharpsl_pm.full_count == 0) {
722 int time;
723
724 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
725
726 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
727 return sharpsl_off_charge_error();
728
729 sharpsl_pm.machinfo->charge(0);
730 mdelay(SHARPSL_CHARGE_WAIT_TIME);
731 sharpsl_pm.machinfo->charge(1);
732 sharpsl_pm.charge_mode = CHRG_ON;
733
734 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
735
736 time = RCNR;
737 while (1) {
738 /* Check if any wakeup event had occurred */
739 if (sharpsl_pm.machinfo->charger_wakeup())
740 return 0;
741 /* Check for timeout */
742 if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
743 return 1;
744 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
745 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
746 sharpsl_pm.full_count++;
747 sharpsl_pm.machinfo->charge(0);
748 mdelay(SHARPSL_CHARGE_WAIT_TIME);
749 sharpsl_pm.machinfo->charge(1);
750 return 1;
751 }
752 }
753 }
754
755 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
756
757 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
758
759 time = RCNR;
760 while (1) {
761 /* Check if any wakeup event had occurred */
762 if (sharpsl_pm.machinfo->charger_wakeup())
763 return 0;
764 /* Check for timeout */
765 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
766 if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
767 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
768 sharpsl_pm.full_count = 0;
769 }
770 sharpsl_pm.full_count++;
771 return 1;
772 }
773 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
774 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
775 sharpsl_pm_led(SHARPSL_LED_OFF);
776 sharpsl_pm.machinfo->charge(0);
777 sharpsl_pm.charge_mode = CHRG_DONE;
778 return 1;
779 }
780 }
781 }
782 #else
783 #define sharpsl_pm_suspend NULL
784 #define sharpsl_pm_resume NULL
785 #endif
786
battery_percentage_show(struct device * dev,struct device_attribute * attr,char * buf)787 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
788 {
789 return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_percent);
790 }
791
battery_voltage_show(struct device * dev,struct device_attribute * attr,char * buf)792 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
793 {
794 return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_voltage);
795 }
796
797 static DEVICE_ATTR_RO(battery_percentage);
798 static DEVICE_ATTR_RO(battery_voltage);
799
800 extern void (*apm_get_power_status)(struct apm_power_info *);
801
sharpsl_apm_get_power_status(struct apm_power_info * info)802 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
803 {
804 info->ac_line_status = sharpsl_pm.battstat.ac_status;
805
806 if (sharpsl_pm.charge_mode == CHRG_ON)
807 info->battery_status = APM_BATTERY_STATUS_CHARGING;
808 else
809 info->battery_status = sharpsl_pm.battstat.mainbat_status;
810
811 info->battery_flag = (1 << info->battery_status);
812 info->battery_life = sharpsl_pm.battstat.mainbat_percent;
813 }
814
815 #ifdef CONFIG_PM
816 static const struct platform_suspend_ops sharpsl_pm_ops = {
817 .prepare = pxa_pm_prepare,
818 .finish = pxa_pm_finish,
819 .enter = corgi_pxa_pm_enter,
820 .valid = suspend_valid_only_mem,
821 };
822 #endif
823
sharpsl_pm_probe(struct platform_device * pdev)824 static int sharpsl_pm_probe(struct platform_device *pdev)
825 {
826 int ret, irq;
827
828 if (!pdev->dev.platform_data)
829 return -EINVAL;
830
831 sharpsl_pm.dev = &pdev->dev;
832 sharpsl_pm.machinfo = pdev->dev.platform_data;
833 sharpsl_pm.charge_mode = CHRG_OFF;
834 sharpsl_pm.flags = 0;
835
836 timer_setup(&sharpsl_pm.ac_timer, sharpsl_ac_timer, 0);
837
838 timer_setup(&sharpsl_pm.chrg_full_timer, sharpsl_chrg_full_timer, 0);
839
840 led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
841
842 sharpsl_pm.machinfo->init();
843
844 gpio_request(sharpsl_pm.machinfo->gpio_acin, "AC IN");
845 gpio_direction_input(sharpsl_pm.machinfo->gpio_acin);
846 gpio_request(sharpsl_pm.machinfo->gpio_batfull, "Battery Full");
847 gpio_direction_input(sharpsl_pm.machinfo->gpio_batfull);
848 gpio_request(sharpsl_pm.machinfo->gpio_batlock, "Battery Lock");
849 gpio_direction_input(sharpsl_pm.machinfo->gpio_batlock);
850
851 /* Register interrupt handlers */
852 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_acin);
853 if (request_irq(irq, sharpsl_ac_isr, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "AC Input Detect", sharpsl_ac_isr)) {
854 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
855 }
856
857 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock);
858 if (request_irq(irq, sharpsl_fatal_isr, IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) {
859 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
860 }
861
862 if (sharpsl_pm.machinfo->gpio_fatal) {
863 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal);
864 if (request_irq(irq, sharpsl_fatal_isr, IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) {
865 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
866 }
867 }
868
869 if (sharpsl_pm.machinfo->batfull_irq) {
870 /* Register interrupt handler. */
871 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull);
872 if (request_irq(irq, sharpsl_chrg_full_isr, IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) {
873 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
874 }
875 }
876
877 ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
878 ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
879 if (ret != 0)
880 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
881
882 apm_get_power_status = sharpsl_apm_get_power_status;
883
884 #ifdef CONFIG_PM
885 suspend_set_ops(&sharpsl_pm_ops);
886 #endif
887
888 mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
889
890 return 0;
891 }
892
sharpsl_pm_remove(struct platform_device * pdev)893 static int sharpsl_pm_remove(struct platform_device *pdev)
894 {
895 suspend_set_ops(NULL);
896
897 device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
898 device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
899
900 led_trigger_unregister_simple(sharpsl_charge_led_trigger);
901
902 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
903 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
904
905 if (sharpsl_pm.machinfo->gpio_fatal)
906 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
907
908 if (sharpsl_pm.machinfo->batfull_irq)
909 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
910
911 gpio_free(sharpsl_pm.machinfo->gpio_batlock);
912 gpio_free(sharpsl_pm.machinfo->gpio_batfull);
913 gpio_free(sharpsl_pm.machinfo->gpio_acin);
914
915 if (sharpsl_pm.machinfo->exit)
916 sharpsl_pm.machinfo->exit();
917
918 del_timer_sync(&sharpsl_pm.chrg_full_timer);
919 del_timer_sync(&sharpsl_pm.ac_timer);
920
921 return 0;
922 }
923
924 static struct platform_driver sharpsl_pm_driver = {
925 .probe = sharpsl_pm_probe,
926 .remove = sharpsl_pm_remove,
927 .suspend = sharpsl_pm_suspend,
928 .resume = sharpsl_pm_resume,
929 .driver = {
930 .name = "sharpsl-pm",
931 },
932 };
933
sharpsl_pm_init(void)934 static int sharpsl_pm_init(void)
935 {
936 return platform_driver_register(&sharpsl_pm_driver);
937 }
938
sharpsl_pm_exit(void)939 static void sharpsl_pm_exit(void)
940 {
941 platform_driver_unregister(&sharpsl_pm_driver);
942 }
943
944 late_initcall(sharpsl_pm_init);
945 module_exit(sharpsl_pm_exit);
946