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