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