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3bb3dbbd DK |
1 | /* |
2 | * Copyright (C) 2011 Samsung Electronics Co., Ltd. | |
3 | * MyungJoo Ham <myungjoo.ham@samsung.com> | |
4 | * | |
5 | * This driver enables to monitor battery health and control charger | |
6 | * during suspend-to-mem. | |
7 | * Charger manager depends on other devices. register this later than | |
8 | * the depending devices. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | **/ | |
14 | ||
15 | #include <linux/io.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/irq.h> | |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/rtc.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/workqueue.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/power/charger-manager.h> | |
24 | #include <linux/regulator/consumer.h> | |
25 | ||
26 | /* | |
27 | * Regard CM_JIFFIES_SMALL jiffies is small enough to ignore for | |
28 | * delayed works so that we can run delayed works with CM_JIFFIES_SMALL | |
29 | * without any delays. | |
30 | */ | |
31 | #define CM_JIFFIES_SMALL (2) | |
32 | ||
33 | /* If y is valid (> 0) and smaller than x, do x = y */ | |
34 | #define CM_MIN_VALID(x, y) x = (((y > 0) && ((x) > (y))) ? (y) : (x)) | |
35 | ||
36 | /* | |
37 | * Regard CM_RTC_SMALL (sec) is small enough to ignore error in invoking | |
38 | * rtc alarm. It should be 2 or larger | |
39 | */ | |
40 | #define CM_RTC_SMALL (2) | |
41 | ||
42 | #define UEVENT_BUF_SIZE 32 | |
43 | ||
44 | static LIST_HEAD(cm_list); | |
45 | static DEFINE_MUTEX(cm_list_mtx); | |
46 | ||
47 | /* About in-suspend (suspend-again) monitoring */ | |
48 | static struct rtc_device *rtc_dev; | |
49 | /* | |
50 | * Backup RTC alarm | |
51 | * Save the wakeup alarm before entering suspend-to-RAM | |
52 | */ | |
53 | static struct rtc_wkalrm rtc_wkalarm_save; | |
54 | /* Backup RTC alarm time in terms of seconds since 01-01-1970 00:00:00 */ | |
55 | static unsigned long rtc_wkalarm_save_time; | |
56 | static bool cm_suspended; | |
57 | static bool cm_rtc_set; | |
58 | static unsigned long cm_suspend_duration_ms; | |
59 | ||
60 | /* Global charger-manager description */ | |
61 | static struct charger_global_desc *g_desc; /* init with setup_charger_manager */ | |
62 | ||
63 | /** | |
64 | * is_batt_present - See if the battery presents in place. | |
65 | * @cm: the Charger Manager representing the battery. | |
66 | */ | |
67 | static bool is_batt_present(struct charger_manager *cm) | |
68 | { | |
69 | union power_supply_propval val; | |
70 | bool present = false; | |
71 | int i, ret; | |
72 | ||
73 | switch (cm->desc->battery_present) { | |
74 | case CM_FUEL_GAUGE: | |
75 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
76 | POWER_SUPPLY_PROP_PRESENT, &val); | |
77 | if (ret == 0 && val.intval) | |
78 | present = true; | |
79 | break; | |
80 | case CM_CHARGER_STAT: | |
81 | for (i = 0; cm->charger_stat[i]; i++) { | |
82 | ret = cm->charger_stat[i]->get_property( | |
83 | cm->charger_stat[i], | |
84 | POWER_SUPPLY_PROP_PRESENT, &val); | |
85 | if (ret == 0 && val.intval) { | |
86 | present = true; | |
87 | break; | |
88 | } | |
89 | } | |
90 | break; | |
91 | } | |
92 | ||
93 | return present; | |
94 | } | |
95 | ||
96 | /** | |
97 | * is_ext_pwr_online - See if an external power source is attached to charge | |
98 | * @cm: the Charger Manager representing the battery. | |
99 | * | |
100 | * Returns true if at least one of the chargers of the battery has an external | |
101 | * power source attached to charge the battery regardless of whether it is | |
102 | * actually charging or not. | |
103 | */ | |
104 | static bool is_ext_pwr_online(struct charger_manager *cm) | |
105 | { | |
106 | union power_supply_propval val; | |
107 | bool online = false; | |
108 | int i, ret; | |
109 | ||
110 | /* If at least one of them has one, it's yes. */ | |
111 | for (i = 0; cm->charger_stat[i]; i++) { | |
112 | ret = cm->charger_stat[i]->get_property( | |
113 | cm->charger_stat[i], | |
114 | POWER_SUPPLY_PROP_ONLINE, &val); | |
115 | if (ret == 0 && val.intval) { | |
116 | online = true; | |
117 | break; | |
118 | } | |
119 | } | |
120 | ||
121 | return online; | |
122 | } | |
123 | ||
ad3d13ee DK |
124 | /** |
125 | * get_batt_uV - Get the voltage level of the battery | |
126 | * @cm: the Charger Manager representing the battery. | |
127 | * @uV: the voltage level returned. | |
128 | * | |
129 | * Returns 0 if there is no error. | |
130 | * Returns a negative value on error. | |
131 | */ | |
132 | static int get_batt_uV(struct charger_manager *cm, int *uV) | |
133 | { | |
134 | union power_supply_propval val; | |
135 | int ret; | |
136 | ||
137 | if (cm->fuel_gauge) | |
138 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
139 | POWER_SUPPLY_PROP_VOLTAGE_NOW, &val); | |
140 | else | |
141 | return -ENODEV; | |
142 | ||
143 | if (ret) | |
144 | return ret; | |
145 | ||
146 | *uV = val.intval; | |
147 | return 0; | |
148 | } | |
149 | ||
3bb3dbbd DK |
150 | /** |
151 | * is_charging - Returns true if the battery is being charged. | |
152 | * @cm: the Charger Manager representing the battery. | |
153 | */ | |
154 | static bool is_charging(struct charger_manager *cm) | |
155 | { | |
156 | int i, ret; | |
157 | bool charging = false; | |
158 | union power_supply_propval val; | |
159 | ||
160 | /* If there is no battery, it cannot be charged */ | |
161 | if (!is_batt_present(cm)) | |
162 | return false; | |
163 | ||
164 | /* If at least one of the charger is charging, return yes */ | |
165 | for (i = 0; cm->charger_stat[i]; i++) { | |
166 | /* 1. The charger sholuld not be DISABLED */ | |
167 | if (cm->emergency_stop) | |
168 | continue; | |
169 | if (!cm->charger_enabled) | |
170 | continue; | |
171 | ||
172 | /* 2. The charger should be online (ext-power) */ | |
173 | ret = cm->charger_stat[i]->get_property( | |
174 | cm->charger_stat[i], | |
175 | POWER_SUPPLY_PROP_ONLINE, &val); | |
176 | if (ret) { | |
177 | dev_warn(cm->dev, "Cannot read ONLINE value from %s.\n", | |
178 | cm->desc->psy_charger_stat[i]); | |
179 | continue; | |
180 | } | |
181 | if (val.intval == 0) | |
182 | continue; | |
183 | ||
184 | /* | |
185 | * 3. The charger should not be FULL, DISCHARGING, | |
186 | * or NOT_CHARGING. | |
187 | */ | |
188 | ret = cm->charger_stat[i]->get_property( | |
189 | cm->charger_stat[i], | |
190 | POWER_SUPPLY_PROP_STATUS, &val); | |
191 | if (ret) { | |
192 | dev_warn(cm->dev, "Cannot read STATUS value from %s.\n", | |
193 | cm->desc->psy_charger_stat[i]); | |
194 | continue; | |
195 | } | |
196 | if (val.intval == POWER_SUPPLY_STATUS_FULL || | |
197 | val.intval == POWER_SUPPLY_STATUS_DISCHARGING || | |
198 | val.intval == POWER_SUPPLY_STATUS_NOT_CHARGING) | |
199 | continue; | |
200 | ||
201 | /* Then, this is charging. */ | |
202 | charging = true; | |
203 | break; | |
204 | } | |
205 | ||
206 | return charging; | |
207 | } | |
208 | ||
209 | /** | |
210 | * is_polling_required - Return true if need to continue polling for this CM. | |
211 | * @cm: the Charger Manager representing the battery. | |
212 | */ | |
213 | static bool is_polling_required(struct charger_manager *cm) | |
214 | { | |
215 | switch (cm->desc->polling_mode) { | |
216 | case CM_POLL_DISABLE: | |
217 | return false; | |
218 | case CM_POLL_ALWAYS: | |
219 | return true; | |
220 | case CM_POLL_EXTERNAL_POWER_ONLY: | |
221 | return is_ext_pwr_online(cm); | |
222 | case CM_POLL_CHARGING_ONLY: | |
223 | return is_charging(cm); | |
224 | default: | |
225 | dev_warn(cm->dev, "Incorrect polling_mode (%d)\n", | |
226 | cm->desc->polling_mode); | |
227 | } | |
228 | ||
229 | return false; | |
230 | } | |
231 | ||
232 | /** | |
233 | * try_charger_enable - Enable/Disable chargers altogether | |
234 | * @cm: the Charger Manager representing the battery. | |
235 | * @enable: true: enable / false: disable | |
236 | * | |
237 | * Note that Charger Manager keeps the charger enabled regardless whether | |
238 | * the charger is charging or not (because battery is full or no external | |
239 | * power source exists) except when CM needs to disable chargers forcibly | |
240 | * bacause of emergency causes; when the battery is overheated or too cold. | |
241 | */ | |
242 | static int try_charger_enable(struct charger_manager *cm, bool enable) | |
243 | { | |
244 | int err = 0, i; | |
245 | struct charger_desc *desc = cm->desc; | |
246 | ||
247 | /* Ignore if it's redundent command */ | |
248 | if (enable && cm->charger_enabled) | |
249 | return 0; | |
250 | if (!enable && !cm->charger_enabled) | |
251 | return 0; | |
252 | ||
253 | if (enable) { | |
254 | if (cm->emergency_stop) | |
255 | return -EAGAIN; | |
256 | err = regulator_bulk_enable(desc->num_charger_regulators, | |
257 | desc->charger_regulators); | |
258 | } else { | |
259 | /* | |
260 | * Abnormal battery state - Stop charging forcibly, | |
261 | * even if charger was enabled at the other places | |
262 | */ | |
263 | err = regulator_bulk_disable(desc->num_charger_regulators, | |
264 | desc->charger_regulators); | |
265 | ||
266 | for (i = 0; i < desc->num_charger_regulators; i++) { | |
267 | if (regulator_is_enabled( | |
268 | desc->charger_regulators[i].consumer)) { | |
269 | regulator_force_disable( | |
270 | desc->charger_regulators[i].consumer); | |
271 | dev_warn(cm->dev, | |
272 | "Disable regulator(%s) forcibly.\n", | |
273 | desc->charger_regulators[i].supply); | |
274 | } | |
275 | } | |
276 | } | |
277 | ||
278 | if (!err) | |
279 | cm->charger_enabled = enable; | |
280 | ||
281 | return err; | |
282 | } | |
283 | ||
284 | /** | |
285 | * uevent_notify - Let users know something has changed. | |
286 | * @cm: the Charger Manager representing the battery. | |
287 | * @event: the event string. | |
288 | * | |
289 | * If @event is null, it implies that uevent_notify is called | |
290 | * by resume function. When called in the resume function, cm_suspended | |
291 | * should be already reset to false in order to let uevent_notify | |
292 | * notify the recent event during the suspend to users. While | |
293 | * suspended, uevent_notify does not notify users, but tracks | |
294 | * events so that uevent_notify can notify users later after resumed. | |
295 | */ | |
296 | static void uevent_notify(struct charger_manager *cm, const char *event) | |
297 | { | |
298 | static char env_str[UEVENT_BUF_SIZE + 1] = ""; | |
299 | static char env_str_save[UEVENT_BUF_SIZE + 1] = ""; | |
300 | ||
301 | if (cm_suspended) { | |
302 | /* Nothing in suspended-event buffer */ | |
303 | if (env_str_save[0] == 0) { | |
304 | if (!strncmp(env_str, event, UEVENT_BUF_SIZE)) | |
305 | return; /* status not changed */ | |
306 | strncpy(env_str_save, event, UEVENT_BUF_SIZE); | |
307 | return; | |
308 | } | |
309 | ||
310 | if (!strncmp(env_str_save, event, UEVENT_BUF_SIZE)) | |
311 | return; /* Duplicated. */ | |
312 | else | |
313 | strncpy(env_str_save, event, UEVENT_BUF_SIZE); | |
314 | ||
315 | return; | |
316 | } | |
317 | ||
318 | if (event == NULL) { | |
319 | /* No messages pending */ | |
320 | if (!env_str_save[0]) | |
321 | return; | |
322 | ||
323 | strncpy(env_str, env_str_save, UEVENT_BUF_SIZE); | |
324 | kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE); | |
325 | env_str_save[0] = 0; | |
326 | ||
327 | return; | |
328 | } | |
329 | ||
330 | /* status not changed */ | |
331 | if (!strncmp(env_str, event, UEVENT_BUF_SIZE)) | |
332 | return; | |
333 | ||
334 | /* save the status and notify the update */ | |
335 | strncpy(env_str, event, UEVENT_BUF_SIZE); | |
336 | kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE); | |
337 | ||
338 | dev_info(cm->dev, event); | |
339 | } | |
340 | ||
341 | /** | |
342 | * _cm_monitor - Monitor the temperature and return true for exceptions. | |
343 | * @cm: the Charger Manager representing the battery. | |
344 | * | |
345 | * Returns true if there is an event to notify for the battery. | |
346 | * (True if the status of "emergency_stop" changes) | |
347 | */ | |
348 | static bool _cm_monitor(struct charger_manager *cm) | |
349 | { | |
350 | struct charger_desc *desc = cm->desc; | |
351 | int temp = desc->temperature_out_of_range(&cm->last_temp_mC); | |
352 | ||
353 | dev_dbg(cm->dev, "monitoring (%2.2d.%3.3dC)\n", | |
354 | cm->last_temp_mC / 1000, cm->last_temp_mC % 1000); | |
355 | ||
356 | /* It has been stopped or charging already */ | |
357 | if (!!temp == !!cm->emergency_stop) | |
358 | return false; | |
359 | ||
360 | if (temp) { | |
361 | cm->emergency_stop = temp; | |
362 | if (!try_charger_enable(cm, false)) { | |
363 | if (temp > 0) | |
364 | uevent_notify(cm, "OVERHEAT"); | |
365 | else | |
366 | uevent_notify(cm, "COLD"); | |
367 | } | |
368 | } else { | |
369 | cm->emergency_stop = 0; | |
370 | if (!try_charger_enable(cm, true)) | |
371 | uevent_notify(cm, "CHARGING"); | |
372 | } | |
373 | ||
374 | return true; | |
375 | } | |
376 | ||
377 | /** | |
378 | * cm_monitor - Monitor every battery. | |
379 | * | |
380 | * Returns true if there is an event to notify from any of the batteries. | |
381 | * (True if the status of "emergency_stop" changes) | |
382 | */ | |
383 | static bool cm_monitor(void) | |
384 | { | |
385 | bool stop = false; | |
386 | struct charger_manager *cm; | |
387 | ||
388 | mutex_lock(&cm_list_mtx); | |
389 | ||
390 | list_for_each_entry(cm, &cm_list, entry) | |
391 | stop = stop || _cm_monitor(cm); | |
392 | ||
393 | mutex_unlock(&cm_list_mtx); | |
394 | ||
395 | return stop; | |
396 | } | |
397 | ||
ad3d13ee DK |
398 | static int charger_get_property(struct power_supply *psy, |
399 | enum power_supply_property psp, | |
400 | union power_supply_propval *val) | |
401 | { | |
402 | struct charger_manager *cm = container_of(psy, | |
403 | struct charger_manager, charger_psy); | |
404 | struct charger_desc *desc = cm->desc; | |
405 | int i, ret = 0, uV; | |
406 | ||
407 | switch (psp) { | |
408 | case POWER_SUPPLY_PROP_STATUS: | |
409 | if (is_charging(cm)) | |
410 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
411 | else if (is_ext_pwr_online(cm)) | |
412 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
413 | else | |
414 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
415 | break; | |
416 | case POWER_SUPPLY_PROP_HEALTH: | |
417 | if (cm->emergency_stop > 0) | |
418 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
419 | else if (cm->emergency_stop < 0) | |
420 | val->intval = POWER_SUPPLY_HEALTH_COLD; | |
421 | else | |
422 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
423 | break; | |
424 | case POWER_SUPPLY_PROP_PRESENT: | |
425 | if (is_batt_present(cm)) | |
426 | val->intval = 1; | |
427 | else | |
428 | val->intval = 0; | |
429 | break; | |
430 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
431 | ret = get_batt_uV(cm, &i); | |
432 | val->intval = i; | |
433 | break; | |
434 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
435 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
436 | POWER_SUPPLY_PROP_CURRENT_NOW, val); | |
437 | break; | |
438 | case POWER_SUPPLY_PROP_TEMP: | |
439 | /* in thenth of centigrade */ | |
440 | if (cm->last_temp_mC == INT_MIN) | |
441 | desc->temperature_out_of_range(&cm->last_temp_mC); | |
442 | val->intval = cm->last_temp_mC / 100; | |
443 | if (!desc->measure_battery_temp) | |
444 | ret = -ENODEV; | |
445 | break; | |
446 | case POWER_SUPPLY_PROP_TEMP_AMBIENT: | |
447 | /* in thenth of centigrade */ | |
448 | if (cm->last_temp_mC == INT_MIN) | |
449 | desc->temperature_out_of_range(&cm->last_temp_mC); | |
450 | val->intval = cm->last_temp_mC / 100; | |
451 | if (desc->measure_battery_temp) | |
452 | ret = -ENODEV; | |
453 | break; | |
454 | case POWER_SUPPLY_PROP_CAPACITY: | |
455 | if (!cm->fuel_gauge) { | |
456 | ret = -ENODEV; | |
457 | break; | |
458 | } | |
459 | ||
460 | if (!is_batt_present(cm)) { | |
461 | /* There is no battery. Assume 100% */ | |
462 | val->intval = 100; | |
463 | break; | |
464 | } | |
465 | ||
466 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
467 | POWER_SUPPLY_PROP_CAPACITY, val); | |
468 | if (ret) | |
469 | break; | |
470 | ||
471 | if (val->intval > 100) { | |
472 | val->intval = 100; | |
473 | break; | |
474 | } | |
475 | if (val->intval < 0) | |
476 | val->intval = 0; | |
477 | ||
478 | /* Do not adjust SOC when charging: voltage is overrated */ | |
479 | if (is_charging(cm)) | |
480 | break; | |
481 | ||
482 | /* | |
483 | * If the capacity value is inconsistent, calibrate it base on | |
484 | * the battery voltage values and the thresholds given as desc | |
485 | */ | |
486 | ret = get_batt_uV(cm, &uV); | |
487 | if (ret) { | |
488 | /* Voltage information not available. No calibration */ | |
489 | ret = 0; | |
490 | break; | |
491 | } | |
492 | ||
493 | if (desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV && | |
494 | !is_charging(cm)) { | |
495 | val->intval = 100; | |
496 | break; | |
497 | } | |
498 | ||
499 | break; | |
500 | case POWER_SUPPLY_PROP_ONLINE: | |
501 | if (is_ext_pwr_online(cm)) | |
502 | val->intval = 1; | |
503 | else | |
504 | val->intval = 0; | |
505 | break; | |
506 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
507 | if (cm->fuel_gauge) { | |
508 | if (cm->fuel_gauge->get_property(cm->fuel_gauge, | |
509 | POWER_SUPPLY_PROP_CHARGE_FULL, val) == 0) | |
510 | break; | |
511 | } | |
512 | ||
513 | if (is_ext_pwr_online(cm)) { | |
514 | /* Not full if it's charging. */ | |
515 | if (is_charging(cm)) { | |
516 | val->intval = 0; | |
517 | break; | |
518 | } | |
519 | /* | |
520 | * Full if it's powered but not charging andi | |
521 | * not forced stop by emergency | |
522 | */ | |
523 | if (!cm->emergency_stop) { | |
524 | val->intval = 1; | |
525 | break; | |
526 | } | |
527 | } | |
528 | ||
529 | /* Full if it's over the fullbatt voltage */ | |
530 | ret = get_batt_uV(cm, &uV); | |
531 | if (!ret && desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV && | |
532 | !is_charging(cm)) { | |
533 | val->intval = 1; | |
534 | break; | |
535 | } | |
536 | ||
537 | /* Full if the cap is 100 */ | |
538 | if (cm->fuel_gauge) { | |
539 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
540 | POWER_SUPPLY_PROP_CAPACITY, val); | |
541 | if (!ret && val->intval >= 100 && !is_charging(cm)) { | |
542 | val->intval = 1; | |
543 | break; | |
544 | } | |
545 | } | |
546 | ||
547 | val->intval = 0; | |
548 | ret = 0; | |
549 | break; | |
550 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
551 | if (is_charging(cm)) { | |
552 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
553 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
554 | val); | |
555 | if (ret) { | |
556 | val->intval = 1; | |
557 | ret = 0; | |
558 | } else { | |
559 | /* If CHARGE_NOW is supplied, use it */ | |
560 | val->intval = (val->intval > 0) ? | |
561 | val->intval : 1; | |
562 | } | |
563 | } else { | |
564 | val->intval = 0; | |
565 | } | |
566 | break; | |
567 | default: | |
568 | return -EINVAL; | |
569 | } | |
570 | return ret; | |
571 | } | |
572 | ||
573 | #define NUM_CHARGER_PSY_OPTIONAL (4) | |
574 | static enum power_supply_property default_charger_props[] = { | |
575 | /* Guaranteed to provide */ | |
576 | POWER_SUPPLY_PROP_STATUS, | |
577 | POWER_SUPPLY_PROP_HEALTH, | |
578 | POWER_SUPPLY_PROP_PRESENT, | |
579 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
580 | POWER_SUPPLY_PROP_CAPACITY, | |
581 | POWER_SUPPLY_PROP_ONLINE, | |
582 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
583 | /* | |
584 | * Optional properties are: | |
585 | * POWER_SUPPLY_PROP_CHARGE_NOW, | |
586 | * POWER_SUPPLY_PROP_CURRENT_NOW, | |
587 | * POWER_SUPPLY_PROP_TEMP, and | |
588 | * POWER_SUPPLY_PROP_TEMP_AMBIENT, | |
589 | */ | |
590 | }; | |
591 | ||
592 | static struct power_supply psy_default = { | |
593 | .name = "battery", | |
594 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
595 | .properties = default_charger_props, | |
596 | .num_properties = ARRAY_SIZE(default_charger_props), | |
597 | .get_property = charger_get_property, | |
598 | }; | |
599 | ||
3bb3dbbd DK |
600 | /** |
601 | * cm_setup_timer - For in-suspend monitoring setup wakeup alarm | |
602 | * for suspend_again. | |
603 | * | |
604 | * Returns true if the alarm is set for Charger Manager to use. | |
605 | * Returns false if | |
606 | * cm_setup_timer fails to set an alarm, | |
607 | * cm_setup_timer does not need to set an alarm for Charger Manager, | |
608 | * or an alarm previously configured is to be used. | |
609 | */ | |
610 | static bool cm_setup_timer(void) | |
611 | { | |
612 | struct charger_manager *cm; | |
613 | unsigned int wakeup_ms = UINT_MAX; | |
614 | bool ret = false; | |
615 | ||
616 | mutex_lock(&cm_list_mtx); | |
617 | ||
618 | list_for_each_entry(cm, &cm_list, entry) { | |
619 | /* Skip if polling is not required for this CM */ | |
620 | if (!is_polling_required(cm) && !cm->emergency_stop) | |
621 | continue; | |
622 | if (cm->desc->polling_interval_ms == 0) | |
623 | continue; | |
624 | CM_MIN_VALID(wakeup_ms, cm->desc->polling_interval_ms); | |
625 | } | |
626 | ||
627 | mutex_unlock(&cm_list_mtx); | |
628 | ||
629 | if (wakeup_ms < UINT_MAX && wakeup_ms > 0) { | |
630 | pr_info("Charger Manager wakeup timer: %u ms.\n", wakeup_ms); | |
631 | if (rtc_dev) { | |
632 | struct rtc_wkalrm tmp; | |
633 | unsigned long time, now; | |
634 | unsigned long add = DIV_ROUND_UP(wakeup_ms, 1000); | |
635 | ||
636 | /* | |
637 | * Set alarm with the polling interval (wakeup_ms) | |
638 | * except when rtc_wkalarm_save comes first. | |
639 | * However, the alarm time should be NOW + | |
640 | * CM_RTC_SMALL or later. | |
641 | */ | |
642 | tmp.enabled = 1; | |
643 | rtc_read_time(rtc_dev, &tmp.time); | |
644 | rtc_tm_to_time(&tmp.time, &now); | |
645 | if (add < CM_RTC_SMALL) | |
646 | add = CM_RTC_SMALL; | |
647 | time = now + add; | |
648 | ||
649 | ret = true; | |
650 | ||
651 | if (rtc_wkalarm_save.enabled && | |
652 | rtc_wkalarm_save_time && | |
653 | rtc_wkalarm_save_time < time) { | |
654 | if (rtc_wkalarm_save_time < now + CM_RTC_SMALL) | |
655 | time = now + CM_RTC_SMALL; | |
656 | else | |
657 | time = rtc_wkalarm_save_time; | |
658 | ||
659 | /* The timer is not appointed by CM */ | |
660 | ret = false; | |
661 | } | |
662 | ||
663 | pr_info("Waking up after %lu secs.\n", | |
664 | time - now); | |
665 | ||
666 | rtc_time_to_tm(time, &tmp.time); | |
667 | rtc_set_alarm(rtc_dev, &tmp); | |
668 | cm_suspend_duration_ms += wakeup_ms; | |
669 | return ret; | |
670 | } | |
671 | } | |
672 | ||
673 | if (rtc_dev) | |
674 | rtc_set_alarm(rtc_dev, &rtc_wkalarm_save); | |
675 | return false; | |
676 | } | |
677 | ||
678 | /** | |
679 | * cm_suspend_again - Determine whether suspend again or not | |
680 | * | |
681 | * Returns true if the system should be suspended again | |
682 | * Returns false if the system should be woken up | |
683 | */ | |
684 | bool cm_suspend_again(void) | |
685 | { | |
686 | struct charger_manager *cm; | |
687 | bool ret = false; | |
688 | ||
689 | if (!g_desc || !g_desc->rtc_only_wakeup || !g_desc->rtc_only_wakeup() || | |
690 | !cm_rtc_set) | |
691 | return false; | |
692 | ||
693 | if (cm_monitor()) | |
694 | goto out; | |
695 | ||
696 | ret = true; | |
697 | mutex_lock(&cm_list_mtx); | |
698 | list_for_each_entry(cm, &cm_list, entry) { | |
699 | if (cm->status_save_ext_pwr_inserted != is_ext_pwr_online(cm) || | |
700 | cm->status_save_batt != is_batt_present(cm)) | |
701 | ret = false; | |
702 | } | |
703 | mutex_unlock(&cm_list_mtx); | |
704 | ||
705 | cm_rtc_set = cm_setup_timer(); | |
706 | out: | |
707 | /* It's about the time when the non-CM appointed timer goes off */ | |
708 | if (rtc_wkalarm_save.enabled) { | |
709 | unsigned long now; | |
710 | struct rtc_time tmp; | |
711 | ||
712 | rtc_read_time(rtc_dev, &tmp); | |
713 | rtc_tm_to_time(&tmp, &now); | |
714 | ||
715 | if (rtc_wkalarm_save_time && | |
716 | now + CM_RTC_SMALL >= rtc_wkalarm_save_time) | |
717 | return false; | |
718 | } | |
719 | return ret; | |
720 | } | |
721 | EXPORT_SYMBOL_GPL(cm_suspend_again); | |
722 | ||
723 | /** | |
724 | * setup_charger_manager - initialize charger_global_desc data | |
725 | * @gd: pointer to instance of charger_global_desc | |
726 | */ | |
727 | int setup_charger_manager(struct charger_global_desc *gd) | |
728 | { | |
729 | if (!gd) | |
730 | return -EINVAL; | |
731 | ||
732 | if (rtc_dev) | |
733 | rtc_class_close(rtc_dev); | |
734 | rtc_dev = NULL; | |
735 | g_desc = NULL; | |
736 | ||
737 | if (!gd->rtc_only_wakeup) { | |
738 | pr_err("The callback rtc_only_wakeup is not given.\n"); | |
739 | return -EINVAL; | |
740 | } | |
741 | ||
742 | if (gd->rtc_name) { | |
743 | rtc_dev = rtc_class_open(gd->rtc_name); | |
744 | if (IS_ERR_OR_NULL(rtc_dev)) { | |
745 | rtc_dev = NULL; | |
746 | /* Retry at probe. RTC may be not registered yet */ | |
747 | } | |
748 | } else { | |
749 | pr_warn("No wakeup timer is given for charger manager." | |
750 | "In-suspend monitoring won't work.\n"); | |
751 | } | |
752 | ||
753 | g_desc = gd; | |
754 | return 0; | |
755 | } | |
756 | EXPORT_SYMBOL_GPL(setup_charger_manager); | |
757 | ||
758 | static int charger_manager_probe(struct platform_device *pdev) | |
759 | { | |
760 | struct charger_desc *desc = dev_get_platdata(&pdev->dev); | |
761 | struct charger_manager *cm; | |
762 | int ret = 0, i = 0; | |
ad3d13ee | 763 | union power_supply_propval val; |
3bb3dbbd DK |
764 | |
765 | if (g_desc && !rtc_dev && g_desc->rtc_name) { | |
766 | rtc_dev = rtc_class_open(g_desc->rtc_name); | |
767 | if (IS_ERR_OR_NULL(rtc_dev)) { | |
768 | rtc_dev = NULL; | |
769 | dev_err(&pdev->dev, "Cannot get RTC %s.\n", | |
770 | g_desc->rtc_name); | |
771 | ret = -ENODEV; | |
772 | goto err_alloc; | |
773 | } | |
774 | } | |
775 | ||
776 | if (!desc) { | |
777 | dev_err(&pdev->dev, "No platform data (desc) found.\n"); | |
778 | ret = -ENODEV; | |
779 | goto err_alloc; | |
780 | } | |
781 | ||
782 | cm = kzalloc(sizeof(struct charger_manager), GFP_KERNEL); | |
783 | if (!cm) { | |
784 | dev_err(&pdev->dev, "Cannot allocate memory.\n"); | |
785 | ret = -ENOMEM; | |
786 | goto err_alloc; | |
787 | } | |
788 | ||
789 | /* Basic Values. Unspecified are Null or 0 */ | |
790 | cm->dev = &pdev->dev; | |
791 | cm->desc = kzalloc(sizeof(struct charger_desc), GFP_KERNEL); | |
792 | if (!cm->desc) { | |
793 | dev_err(&pdev->dev, "Cannot allocate memory.\n"); | |
794 | ret = -ENOMEM; | |
795 | goto err_alloc_desc; | |
796 | } | |
797 | memcpy(cm->desc, desc, sizeof(struct charger_desc)); | |
798 | cm->last_temp_mC = INT_MIN; /* denotes "unmeasured, yet" */ | |
799 | ||
800 | if (!desc->charger_regulators || desc->num_charger_regulators < 1) { | |
801 | ret = -EINVAL; | |
802 | dev_err(&pdev->dev, "charger_regulators undefined.\n"); | |
803 | goto err_no_charger; | |
804 | } | |
805 | ||
806 | if (!desc->psy_charger_stat || !desc->psy_charger_stat[0]) { | |
807 | dev_err(&pdev->dev, "No power supply defined.\n"); | |
808 | ret = -EINVAL; | |
809 | goto err_no_charger_stat; | |
810 | } | |
811 | ||
812 | /* Counting index only */ | |
813 | while (desc->psy_charger_stat[i]) | |
814 | i++; | |
815 | ||
816 | cm->charger_stat = kzalloc(sizeof(struct power_supply *) * (i + 1), | |
817 | GFP_KERNEL); | |
818 | if (!cm->charger_stat) { | |
819 | ret = -ENOMEM; | |
820 | goto err_no_charger_stat; | |
821 | } | |
822 | ||
823 | for (i = 0; desc->psy_charger_stat[i]; i++) { | |
824 | cm->charger_stat[i] = power_supply_get_by_name( | |
825 | desc->psy_charger_stat[i]); | |
826 | if (!cm->charger_stat[i]) { | |
827 | dev_err(&pdev->dev, "Cannot find power supply " | |
828 | "\"%s\"\n", | |
829 | desc->psy_charger_stat[i]); | |
830 | ret = -ENODEV; | |
831 | goto err_chg_stat; | |
832 | } | |
833 | } | |
834 | ||
835 | cm->fuel_gauge = power_supply_get_by_name(desc->psy_fuel_gauge); | |
836 | if (!cm->fuel_gauge) { | |
837 | dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n", | |
838 | desc->psy_fuel_gauge); | |
839 | ret = -ENODEV; | |
840 | goto err_chg_stat; | |
841 | } | |
842 | ||
843 | if (desc->polling_interval_ms == 0 || | |
844 | msecs_to_jiffies(desc->polling_interval_ms) <= CM_JIFFIES_SMALL) { | |
845 | dev_err(&pdev->dev, "polling_interval_ms is too small\n"); | |
846 | ret = -EINVAL; | |
847 | goto err_chg_stat; | |
848 | } | |
849 | ||
850 | if (!desc->temperature_out_of_range) { | |
851 | dev_err(&pdev->dev, "there is no temperature_out_of_range\n"); | |
852 | ret = -EINVAL; | |
853 | goto err_chg_stat; | |
854 | } | |
855 | ||
856 | platform_set_drvdata(pdev, cm); | |
857 | ||
ad3d13ee DK |
858 | memcpy(&cm->charger_psy, &psy_default, |
859 | sizeof(psy_default)); | |
860 | if (!desc->psy_name) { | |
861 | strncpy(cm->psy_name_buf, psy_default.name, | |
862 | PSY_NAME_MAX); | |
863 | } else { | |
864 | strncpy(cm->psy_name_buf, desc->psy_name, PSY_NAME_MAX); | |
865 | } | |
866 | cm->charger_psy.name = cm->psy_name_buf; | |
867 | ||
868 | /* Allocate for psy properties because they may vary */ | |
869 | cm->charger_psy.properties = kzalloc(sizeof(enum power_supply_property) | |
870 | * (ARRAY_SIZE(default_charger_props) + | |
871 | NUM_CHARGER_PSY_OPTIONAL), | |
872 | GFP_KERNEL); | |
873 | if (!cm->charger_psy.properties) { | |
874 | dev_err(&pdev->dev, "Cannot allocate for psy properties.\n"); | |
875 | ret = -ENOMEM; | |
876 | goto err_chg_stat; | |
877 | } | |
878 | memcpy(cm->charger_psy.properties, default_charger_props, | |
879 | sizeof(enum power_supply_property) * | |
880 | ARRAY_SIZE(default_charger_props)); | |
881 | cm->charger_psy.num_properties = psy_default.num_properties; | |
882 | ||
883 | /* Find which optional psy-properties are available */ | |
884 | if (!cm->fuel_gauge->get_property(cm->fuel_gauge, | |
885 | POWER_SUPPLY_PROP_CHARGE_NOW, &val)) { | |
886 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
887 | POWER_SUPPLY_PROP_CHARGE_NOW; | |
888 | cm->charger_psy.num_properties++; | |
889 | } | |
890 | if (!cm->fuel_gauge->get_property(cm->fuel_gauge, | |
891 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
892 | &val)) { | |
893 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
894 | POWER_SUPPLY_PROP_CURRENT_NOW; | |
895 | cm->charger_psy.num_properties++; | |
896 | } | |
897 | if (!desc->measure_battery_temp) { | |
898 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
899 | POWER_SUPPLY_PROP_TEMP_AMBIENT; | |
900 | cm->charger_psy.num_properties++; | |
901 | } | |
902 | if (desc->measure_battery_temp) { | |
903 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
904 | POWER_SUPPLY_PROP_TEMP; | |
905 | cm->charger_psy.num_properties++; | |
906 | } | |
907 | ||
908 | ret = power_supply_register(NULL, &cm->charger_psy); | |
909 | if (ret) { | |
910 | dev_err(&pdev->dev, "Cannot register charger-manager with" | |
911 | " name \"%s\".\n", cm->charger_psy.name); | |
912 | goto err_register; | |
913 | } | |
914 | ||
3bb3dbbd DK |
915 | ret = regulator_bulk_get(&pdev->dev, desc->num_charger_regulators, |
916 | desc->charger_regulators); | |
917 | if (ret) { | |
918 | dev_err(&pdev->dev, "Cannot get charger regulators.\n"); | |
ad3d13ee | 919 | goto err_bulk_get; |
3bb3dbbd DK |
920 | } |
921 | ||
922 | ret = try_charger_enable(cm, true); | |
923 | if (ret) { | |
924 | dev_err(&pdev->dev, "Cannot enable charger regulators\n"); | |
925 | goto err_chg_enable; | |
926 | } | |
927 | ||
928 | /* Add to the list */ | |
929 | mutex_lock(&cm_list_mtx); | |
930 | list_add(&cm->entry, &cm_list); | |
931 | mutex_unlock(&cm_list_mtx); | |
932 | ||
933 | return 0; | |
934 | ||
935 | err_chg_enable: | |
936 | if (desc->charger_regulators) | |
937 | regulator_bulk_free(desc->num_charger_regulators, | |
938 | desc->charger_regulators); | |
ad3d13ee DK |
939 | err_bulk_get: |
940 | power_supply_unregister(&cm->charger_psy); | |
941 | err_register: | |
942 | kfree(cm->charger_psy.properties); | |
3bb3dbbd DK |
943 | err_chg_stat: |
944 | kfree(cm->charger_stat); | |
945 | err_no_charger_stat: | |
946 | err_no_charger: | |
947 | kfree(cm->desc); | |
948 | err_alloc_desc: | |
949 | kfree(cm); | |
950 | err_alloc: | |
951 | return ret; | |
952 | } | |
953 | ||
954 | static int __devexit charger_manager_remove(struct platform_device *pdev) | |
955 | { | |
956 | struct charger_manager *cm = platform_get_drvdata(pdev); | |
957 | struct charger_desc *desc = cm->desc; | |
958 | ||
959 | /* Remove from the list */ | |
960 | mutex_lock(&cm_list_mtx); | |
961 | list_del(&cm->entry); | |
962 | mutex_unlock(&cm_list_mtx); | |
963 | ||
964 | if (desc->charger_regulators) | |
965 | regulator_bulk_free(desc->num_charger_regulators, | |
966 | desc->charger_regulators); | |
ad3d13ee DK |
967 | |
968 | power_supply_unregister(&cm->charger_psy); | |
969 | kfree(cm->charger_psy.properties); | |
3bb3dbbd DK |
970 | kfree(cm->charger_stat); |
971 | kfree(cm->desc); | |
972 | kfree(cm); | |
973 | ||
974 | return 0; | |
975 | } | |
976 | ||
1bbe24d4 | 977 | static const struct platform_device_id charger_manager_id[] = { |
3bb3dbbd DK |
978 | { "charger-manager", 0 }, |
979 | { }, | |
980 | }; | |
1bbe24d4 | 981 | MODULE_DEVICE_TABLE(platform, charger_manager_id); |
3bb3dbbd DK |
982 | |
983 | static int cm_suspend_prepare(struct device *dev) | |
984 | { | |
985 | struct platform_device *pdev = container_of(dev, struct platform_device, | |
986 | dev); | |
987 | struct charger_manager *cm = platform_get_drvdata(pdev); | |
988 | ||
989 | if (!cm_suspended) { | |
990 | if (rtc_dev) { | |
991 | struct rtc_time tmp; | |
992 | unsigned long now; | |
993 | ||
994 | rtc_read_alarm(rtc_dev, &rtc_wkalarm_save); | |
995 | rtc_read_time(rtc_dev, &tmp); | |
996 | ||
997 | if (rtc_wkalarm_save.enabled) { | |
998 | rtc_tm_to_time(&rtc_wkalarm_save.time, | |
999 | &rtc_wkalarm_save_time); | |
1000 | rtc_tm_to_time(&tmp, &now); | |
1001 | if (now > rtc_wkalarm_save_time) | |
1002 | rtc_wkalarm_save_time = 0; | |
1003 | } else { | |
1004 | rtc_wkalarm_save_time = 0; | |
1005 | } | |
1006 | } | |
1007 | cm_suspended = true; | |
1008 | } | |
1009 | ||
1010 | cm->status_save_ext_pwr_inserted = is_ext_pwr_online(cm); | |
1011 | cm->status_save_batt = is_batt_present(cm); | |
1012 | ||
1013 | if (!cm_rtc_set) { | |
1014 | cm_suspend_duration_ms = 0; | |
1015 | cm_rtc_set = cm_setup_timer(); | |
1016 | } | |
1017 | ||
1018 | return 0; | |
1019 | } | |
1020 | ||
1021 | static void cm_suspend_complete(struct device *dev) | |
1022 | { | |
1023 | struct platform_device *pdev = container_of(dev, struct platform_device, | |
1024 | dev); | |
1025 | struct charger_manager *cm = platform_get_drvdata(pdev); | |
1026 | ||
1027 | if (cm_suspended) { | |
1028 | if (rtc_dev) { | |
1029 | struct rtc_wkalrm tmp; | |
1030 | ||
1031 | rtc_read_alarm(rtc_dev, &tmp); | |
1032 | rtc_wkalarm_save.pending = tmp.pending; | |
1033 | rtc_set_alarm(rtc_dev, &rtc_wkalarm_save); | |
1034 | } | |
1035 | cm_suspended = false; | |
1036 | cm_rtc_set = false; | |
1037 | } | |
1038 | ||
1039 | uevent_notify(cm, NULL); | |
1040 | } | |
1041 | ||
1042 | static const struct dev_pm_ops charger_manager_pm = { | |
1043 | .prepare = cm_suspend_prepare, | |
1044 | .complete = cm_suspend_complete, | |
1045 | }; | |
1046 | ||
1047 | static struct platform_driver charger_manager_driver = { | |
1048 | .driver = { | |
1049 | .name = "charger-manager", | |
1050 | .owner = THIS_MODULE, | |
1051 | .pm = &charger_manager_pm, | |
1052 | }, | |
1053 | .probe = charger_manager_probe, | |
1054 | .remove = __devexit_p(charger_manager_remove), | |
1055 | .id_table = charger_manager_id, | |
1056 | }; | |
1057 | ||
1058 | static int __init charger_manager_init(void) | |
1059 | { | |
1060 | return platform_driver_register(&charger_manager_driver); | |
1061 | } | |
1062 | late_initcall(charger_manager_init); | |
1063 | ||
1064 | static void __exit charger_manager_cleanup(void) | |
1065 | { | |
1066 | platform_driver_unregister(&charger_manager_driver); | |
1067 | } | |
1068 | module_exit(charger_manager_cleanup); | |
1069 | ||
1070 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); | |
1071 | MODULE_DESCRIPTION("Charger Manager"); | |
1072 | MODULE_LICENSE("GPL"); |