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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 | ||
bb2a95c2 | 137 | if (!cm->fuel_gauge) |
ad3d13ee DK |
138 | return -ENODEV; |
139 | ||
bb2a95c2 AL |
140 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, |
141 | POWER_SUPPLY_PROP_VOLTAGE_NOW, &val); | |
ad3d13ee DK |
142 | if (ret) |
143 | return ret; | |
144 | ||
145 | *uV = val.intval; | |
146 | return 0; | |
147 | } | |
148 | ||
3bb3dbbd DK |
149 | /** |
150 | * is_charging - Returns true if the battery is being charged. | |
151 | * @cm: the Charger Manager representing the battery. | |
152 | */ | |
153 | static bool is_charging(struct charger_manager *cm) | |
154 | { | |
155 | int i, ret; | |
156 | bool charging = false; | |
157 | union power_supply_propval val; | |
158 | ||
159 | /* If there is no battery, it cannot be charged */ | |
160 | if (!is_batt_present(cm)) | |
161 | return false; | |
162 | ||
163 | /* If at least one of the charger is charging, return yes */ | |
164 | for (i = 0; cm->charger_stat[i]; i++) { | |
165 | /* 1. The charger sholuld not be DISABLED */ | |
166 | if (cm->emergency_stop) | |
167 | continue; | |
168 | if (!cm->charger_enabled) | |
169 | continue; | |
170 | ||
171 | /* 2. The charger should be online (ext-power) */ | |
172 | ret = cm->charger_stat[i]->get_property( | |
173 | cm->charger_stat[i], | |
174 | POWER_SUPPLY_PROP_ONLINE, &val); | |
175 | if (ret) { | |
176 | dev_warn(cm->dev, "Cannot read ONLINE value from %s.\n", | |
177 | cm->desc->psy_charger_stat[i]); | |
178 | continue; | |
179 | } | |
180 | if (val.intval == 0) | |
181 | continue; | |
182 | ||
183 | /* | |
184 | * 3. The charger should not be FULL, DISCHARGING, | |
185 | * or NOT_CHARGING. | |
186 | */ | |
187 | ret = cm->charger_stat[i]->get_property( | |
188 | cm->charger_stat[i], | |
189 | POWER_SUPPLY_PROP_STATUS, &val); | |
190 | if (ret) { | |
191 | dev_warn(cm->dev, "Cannot read STATUS value from %s.\n", | |
192 | cm->desc->psy_charger_stat[i]); | |
193 | continue; | |
194 | } | |
195 | if (val.intval == POWER_SUPPLY_STATUS_FULL || | |
196 | val.intval == POWER_SUPPLY_STATUS_DISCHARGING || | |
197 | val.intval == POWER_SUPPLY_STATUS_NOT_CHARGING) | |
198 | continue; | |
199 | ||
200 | /* Then, this is charging. */ | |
201 | charging = true; | |
202 | break; | |
203 | } | |
204 | ||
205 | return charging; | |
206 | } | |
207 | ||
208 | /** | |
209 | * is_polling_required - Return true if need to continue polling for this CM. | |
210 | * @cm: the Charger Manager representing the battery. | |
211 | */ | |
212 | static bool is_polling_required(struct charger_manager *cm) | |
213 | { | |
214 | switch (cm->desc->polling_mode) { | |
215 | case CM_POLL_DISABLE: | |
216 | return false; | |
217 | case CM_POLL_ALWAYS: | |
218 | return true; | |
219 | case CM_POLL_EXTERNAL_POWER_ONLY: | |
220 | return is_ext_pwr_online(cm); | |
221 | case CM_POLL_CHARGING_ONLY: | |
222 | return is_charging(cm); | |
223 | default: | |
224 | dev_warn(cm->dev, "Incorrect polling_mode (%d)\n", | |
225 | cm->desc->polling_mode); | |
226 | } | |
227 | ||
228 | return false; | |
229 | } | |
230 | ||
231 | /** | |
232 | * try_charger_enable - Enable/Disable chargers altogether | |
233 | * @cm: the Charger Manager representing the battery. | |
234 | * @enable: true: enable / false: disable | |
235 | * | |
236 | * Note that Charger Manager keeps the charger enabled regardless whether | |
237 | * the charger is charging or not (because battery is full or no external | |
238 | * power source exists) except when CM needs to disable chargers forcibly | |
239 | * bacause of emergency causes; when the battery is overheated or too cold. | |
240 | */ | |
241 | static int try_charger_enable(struct charger_manager *cm, bool enable) | |
242 | { | |
243 | int err = 0, i; | |
244 | struct charger_desc *desc = cm->desc; | |
245 | ||
246 | /* Ignore if it's redundent command */ | |
bb2a95c2 | 247 | if (enable == cm->charger_enabled) |
3bb3dbbd DK |
248 | return 0; |
249 | ||
250 | if (enable) { | |
251 | if (cm->emergency_stop) | |
252 | return -EAGAIN; | |
253 | err = regulator_bulk_enable(desc->num_charger_regulators, | |
254 | desc->charger_regulators); | |
255 | } else { | |
256 | /* | |
257 | * Abnormal battery state - Stop charging forcibly, | |
258 | * even if charger was enabled at the other places | |
259 | */ | |
260 | err = regulator_bulk_disable(desc->num_charger_regulators, | |
261 | desc->charger_regulators); | |
262 | ||
263 | for (i = 0; i < desc->num_charger_regulators; i++) { | |
264 | if (regulator_is_enabled( | |
265 | desc->charger_regulators[i].consumer)) { | |
266 | regulator_force_disable( | |
267 | desc->charger_regulators[i].consumer); | |
268 | dev_warn(cm->dev, | |
269 | "Disable regulator(%s) forcibly.\n", | |
270 | desc->charger_regulators[i].supply); | |
271 | } | |
272 | } | |
273 | } | |
274 | ||
275 | if (!err) | |
276 | cm->charger_enabled = enable; | |
277 | ||
278 | return err; | |
279 | } | |
280 | ||
281 | /** | |
282 | * uevent_notify - Let users know something has changed. | |
283 | * @cm: the Charger Manager representing the battery. | |
284 | * @event: the event string. | |
285 | * | |
286 | * If @event is null, it implies that uevent_notify is called | |
287 | * by resume function. When called in the resume function, cm_suspended | |
288 | * should be already reset to false in order to let uevent_notify | |
289 | * notify the recent event during the suspend to users. While | |
290 | * suspended, uevent_notify does not notify users, but tracks | |
291 | * events so that uevent_notify can notify users later after resumed. | |
292 | */ | |
293 | static void uevent_notify(struct charger_manager *cm, const char *event) | |
294 | { | |
295 | static char env_str[UEVENT_BUF_SIZE + 1] = ""; | |
296 | static char env_str_save[UEVENT_BUF_SIZE + 1] = ""; | |
297 | ||
298 | if (cm_suspended) { | |
299 | /* Nothing in suspended-event buffer */ | |
300 | if (env_str_save[0] == 0) { | |
301 | if (!strncmp(env_str, event, UEVENT_BUF_SIZE)) | |
302 | return; /* status not changed */ | |
303 | strncpy(env_str_save, event, UEVENT_BUF_SIZE); | |
304 | return; | |
305 | } | |
306 | ||
307 | if (!strncmp(env_str_save, event, UEVENT_BUF_SIZE)) | |
308 | return; /* Duplicated. */ | |
bb2a95c2 | 309 | strncpy(env_str_save, event, UEVENT_BUF_SIZE); |
3bb3dbbd DK |
310 | return; |
311 | } | |
312 | ||
313 | if (event == NULL) { | |
314 | /* No messages pending */ | |
315 | if (!env_str_save[0]) | |
316 | return; | |
317 | ||
318 | strncpy(env_str, env_str_save, UEVENT_BUF_SIZE); | |
319 | kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE); | |
320 | env_str_save[0] = 0; | |
321 | ||
322 | return; | |
323 | } | |
324 | ||
325 | /* status not changed */ | |
326 | if (!strncmp(env_str, event, UEVENT_BUF_SIZE)) | |
327 | return; | |
328 | ||
329 | /* save the status and notify the update */ | |
330 | strncpy(env_str, event, UEVENT_BUF_SIZE); | |
331 | kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE); | |
332 | ||
333 | dev_info(cm->dev, event); | |
334 | } | |
335 | ||
336 | /** | |
337 | * _cm_monitor - Monitor the temperature and return true for exceptions. | |
338 | * @cm: the Charger Manager representing the battery. | |
339 | * | |
340 | * Returns true if there is an event to notify for the battery. | |
341 | * (True if the status of "emergency_stop" changes) | |
342 | */ | |
343 | static bool _cm_monitor(struct charger_manager *cm) | |
344 | { | |
345 | struct charger_desc *desc = cm->desc; | |
346 | int temp = desc->temperature_out_of_range(&cm->last_temp_mC); | |
347 | ||
348 | dev_dbg(cm->dev, "monitoring (%2.2d.%3.3dC)\n", | |
349 | cm->last_temp_mC / 1000, cm->last_temp_mC % 1000); | |
350 | ||
351 | /* It has been stopped or charging already */ | |
352 | if (!!temp == !!cm->emergency_stop) | |
353 | return false; | |
354 | ||
355 | if (temp) { | |
356 | cm->emergency_stop = temp; | |
357 | if (!try_charger_enable(cm, false)) { | |
358 | if (temp > 0) | |
359 | uevent_notify(cm, "OVERHEAT"); | |
360 | else | |
361 | uevent_notify(cm, "COLD"); | |
362 | } | |
363 | } else { | |
364 | cm->emergency_stop = 0; | |
365 | if (!try_charger_enable(cm, true)) | |
366 | uevent_notify(cm, "CHARGING"); | |
367 | } | |
368 | ||
369 | return true; | |
370 | } | |
371 | ||
372 | /** | |
373 | * cm_monitor - Monitor every battery. | |
374 | * | |
375 | * Returns true if there is an event to notify from any of the batteries. | |
376 | * (True if the status of "emergency_stop" changes) | |
377 | */ | |
378 | static bool cm_monitor(void) | |
379 | { | |
380 | bool stop = false; | |
381 | struct charger_manager *cm; | |
382 | ||
383 | mutex_lock(&cm_list_mtx); | |
384 | ||
bb2a95c2 AL |
385 | list_for_each_entry(cm, &cm_list, entry) { |
386 | if (_cm_monitor(cm)) | |
387 | stop = true; | |
388 | } | |
3bb3dbbd DK |
389 | |
390 | mutex_unlock(&cm_list_mtx); | |
391 | ||
392 | return stop; | |
393 | } | |
394 | ||
ad3d13ee DK |
395 | static int charger_get_property(struct power_supply *psy, |
396 | enum power_supply_property psp, | |
397 | union power_supply_propval *val) | |
398 | { | |
399 | struct charger_manager *cm = container_of(psy, | |
400 | struct charger_manager, charger_psy); | |
401 | struct charger_desc *desc = cm->desc; | |
402 | int i, ret = 0, uV; | |
403 | ||
404 | switch (psp) { | |
405 | case POWER_SUPPLY_PROP_STATUS: | |
406 | if (is_charging(cm)) | |
407 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
408 | else if (is_ext_pwr_online(cm)) | |
409 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
410 | else | |
411 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
412 | break; | |
413 | case POWER_SUPPLY_PROP_HEALTH: | |
414 | if (cm->emergency_stop > 0) | |
415 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
416 | else if (cm->emergency_stop < 0) | |
417 | val->intval = POWER_SUPPLY_HEALTH_COLD; | |
418 | else | |
419 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
420 | break; | |
421 | case POWER_SUPPLY_PROP_PRESENT: | |
422 | if (is_batt_present(cm)) | |
423 | val->intval = 1; | |
424 | else | |
425 | val->intval = 0; | |
426 | break; | |
427 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
428 | ret = get_batt_uV(cm, &i); | |
429 | val->intval = i; | |
430 | break; | |
431 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
432 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
433 | POWER_SUPPLY_PROP_CURRENT_NOW, val); | |
434 | break; | |
435 | case POWER_SUPPLY_PROP_TEMP: | |
436 | /* in thenth of centigrade */ | |
437 | if (cm->last_temp_mC == INT_MIN) | |
438 | desc->temperature_out_of_range(&cm->last_temp_mC); | |
439 | val->intval = cm->last_temp_mC / 100; | |
440 | if (!desc->measure_battery_temp) | |
441 | ret = -ENODEV; | |
442 | break; | |
443 | case POWER_SUPPLY_PROP_TEMP_AMBIENT: | |
444 | /* in thenth of centigrade */ | |
445 | if (cm->last_temp_mC == INT_MIN) | |
446 | desc->temperature_out_of_range(&cm->last_temp_mC); | |
447 | val->intval = cm->last_temp_mC / 100; | |
448 | if (desc->measure_battery_temp) | |
449 | ret = -ENODEV; | |
450 | break; | |
451 | case POWER_SUPPLY_PROP_CAPACITY: | |
452 | if (!cm->fuel_gauge) { | |
453 | ret = -ENODEV; | |
454 | break; | |
455 | } | |
456 | ||
457 | if (!is_batt_present(cm)) { | |
458 | /* There is no battery. Assume 100% */ | |
459 | val->intval = 100; | |
460 | break; | |
461 | } | |
462 | ||
463 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
464 | POWER_SUPPLY_PROP_CAPACITY, val); | |
465 | if (ret) | |
466 | break; | |
467 | ||
468 | if (val->intval > 100) { | |
469 | val->intval = 100; | |
470 | break; | |
471 | } | |
472 | if (val->intval < 0) | |
473 | val->intval = 0; | |
474 | ||
475 | /* Do not adjust SOC when charging: voltage is overrated */ | |
476 | if (is_charging(cm)) | |
477 | break; | |
478 | ||
479 | /* | |
480 | * If the capacity value is inconsistent, calibrate it base on | |
481 | * the battery voltage values and the thresholds given as desc | |
482 | */ | |
483 | ret = get_batt_uV(cm, &uV); | |
484 | if (ret) { | |
485 | /* Voltage information not available. No calibration */ | |
486 | ret = 0; | |
487 | break; | |
488 | } | |
489 | ||
490 | if (desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV && | |
491 | !is_charging(cm)) { | |
492 | val->intval = 100; | |
493 | break; | |
494 | } | |
495 | ||
496 | break; | |
497 | case POWER_SUPPLY_PROP_ONLINE: | |
498 | if (is_ext_pwr_online(cm)) | |
499 | val->intval = 1; | |
500 | else | |
501 | val->intval = 0; | |
502 | break; | |
503 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
504 | if (cm->fuel_gauge) { | |
505 | if (cm->fuel_gauge->get_property(cm->fuel_gauge, | |
506 | POWER_SUPPLY_PROP_CHARGE_FULL, val) == 0) | |
507 | break; | |
508 | } | |
509 | ||
510 | if (is_ext_pwr_online(cm)) { | |
511 | /* Not full if it's charging. */ | |
512 | if (is_charging(cm)) { | |
513 | val->intval = 0; | |
514 | break; | |
515 | } | |
516 | /* | |
517 | * Full if it's powered but not charging andi | |
518 | * not forced stop by emergency | |
519 | */ | |
520 | if (!cm->emergency_stop) { | |
521 | val->intval = 1; | |
522 | break; | |
523 | } | |
524 | } | |
525 | ||
526 | /* Full if it's over the fullbatt voltage */ | |
527 | ret = get_batt_uV(cm, &uV); | |
528 | if (!ret && desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV && | |
529 | !is_charging(cm)) { | |
530 | val->intval = 1; | |
531 | break; | |
532 | } | |
533 | ||
534 | /* Full if the cap is 100 */ | |
535 | if (cm->fuel_gauge) { | |
536 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
537 | POWER_SUPPLY_PROP_CAPACITY, val); | |
538 | if (!ret && val->intval >= 100 && !is_charging(cm)) { | |
539 | val->intval = 1; | |
540 | break; | |
541 | } | |
542 | } | |
543 | ||
544 | val->intval = 0; | |
545 | ret = 0; | |
546 | break; | |
547 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
548 | if (is_charging(cm)) { | |
549 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
550 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
551 | val); | |
552 | if (ret) { | |
553 | val->intval = 1; | |
554 | ret = 0; | |
555 | } else { | |
556 | /* If CHARGE_NOW is supplied, use it */ | |
557 | val->intval = (val->intval > 0) ? | |
558 | val->intval : 1; | |
559 | } | |
560 | } else { | |
561 | val->intval = 0; | |
562 | } | |
563 | break; | |
564 | default: | |
565 | return -EINVAL; | |
566 | } | |
567 | return ret; | |
568 | } | |
569 | ||
570 | #define NUM_CHARGER_PSY_OPTIONAL (4) | |
571 | static enum power_supply_property default_charger_props[] = { | |
572 | /* Guaranteed to provide */ | |
573 | POWER_SUPPLY_PROP_STATUS, | |
574 | POWER_SUPPLY_PROP_HEALTH, | |
575 | POWER_SUPPLY_PROP_PRESENT, | |
576 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
577 | POWER_SUPPLY_PROP_CAPACITY, | |
578 | POWER_SUPPLY_PROP_ONLINE, | |
579 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
580 | /* | |
581 | * Optional properties are: | |
582 | * POWER_SUPPLY_PROP_CHARGE_NOW, | |
583 | * POWER_SUPPLY_PROP_CURRENT_NOW, | |
584 | * POWER_SUPPLY_PROP_TEMP, and | |
585 | * POWER_SUPPLY_PROP_TEMP_AMBIENT, | |
586 | */ | |
587 | }; | |
588 | ||
589 | static struct power_supply psy_default = { | |
590 | .name = "battery", | |
591 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
592 | .properties = default_charger_props, | |
593 | .num_properties = ARRAY_SIZE(default_charger_props), | |
594 | .get_property = charger_get_property, | |
595 | }; | |
596 | ||
3bb3dbbd DK |
597 | /** |
598 | * cm_setup_timer - For in-suspend monitoring setup wakeup alarm | |
599 | * for suspend_again. | |
600 | * | |
601 | * Returns true if the alarm is set for Charger Manager to use. | |
602 | * Returns false if | |
603 | * cm_setup_timer fails to set an alarm, | |
604 | * cm_setup_timer does not need to set an alarm for Charger Manager, | |
605 | * or an alarm previously configured is to be used. | |
606 | */ | |
607 | static bool cm_setup_timer(void) | |
608 | { | |
609 | struct charger_manager *cm; | |
610 | unsigned int wakeup_ms = UINT_MAX; | |
611 | bool ret = false; | |
612 | ||
613 | mutex_lock(&cm_list_mtx); | |
614 | ||
615 | list_for_each_entry(cm, &cm_list, entry) { | |
616 | /* Skip if polling is not required for this CM */ | |
617 | if (!is_polling_required(cm) && !cm->emergency_stop) | |
618 | continue; | |
619 | if (cm->desc->polling_interval_ms == 0) | |
620 | continue; | |
621 | CM_MIN_VALID(wakeup_ms, cm->desc->polling_interval_ms); | |
622 | } | |
623 | ||
624 | mutex_unlock(&cm_list_mtx); | |
625 | ||
626 | if (wakeup_ms < UINT_MAX && wakeup_ms > 0) { | |
627 | pr_info("Charger Manager wakeup timer: %u ms.\n", wakeup_ms); | |
628 | if (rtc_dev) { | |
629 | struct rtc_wkalrm tmp; | |
630 | unsigned long time, now; | |
631 | unsigned long add = DIV_ROUND_UP(wakeup_ms, 1000); | |
632 | ||
633 | /* | |
634 | * Set alarm with the polling interval (wakeup_ms) | |
635 | * except when rtc_wkalarm_save comes first. | |
636 | * However, the alarm time should be NOW + | |
637 | * CM_RTC_SMALL or later. | |
638 | */ | |
639 | tmp.enabled = 1; | |
640 | rtc_read_time(rtc_dev, &tmp.time); | |
641 | rtc_tm_to_time(&tmp.time, &now); | |
642 | if (add < CM_RTC_SMALL) | |
643 | add = CM_RTC_SMALL; | |
644 | time = now + add; | |
645 | ||
646 | ret = true; | |
647 | ||
648 | if (rtc_wkalarm_save.enabled && | |
649 | rtc_wkalarm_save_time && | |
650 | rtc_wkalarm_save_time < time) { | |
651 | if (rtc_wkalarm_save_time < now + CM_RTC_SMALL) | |
652 | time = now + CM_RTC_SMALL; | |
653 | else | |
654 | time = rtc_wkalarm_save_time; | |
655 | ||
656 | /* The timer is not appointed by CM */ | |
657 | ret = false; | |
658 | } | |
659 | ||
660 | pr_info("Waking up after %lu secs.\n", | |
661 | time - now); | |
662 | ||
663 | rtc_time_to_tm(time, &tmp.time); | |
664 | rtc_set_alarm(rtc_dev, &tmp); | |
665 | cm_suspend_duration_ms += wakeup_ms; | |
666 | return ret; | |
667 | } | |
668 | } | |
669 | ||
670 | if (rtc_dev) | |
671 | rtc_set_alarm(rtc_dev, &rtc_wkalarm_save); | |
672 | return false; | |
673 | } | |
674 | ||
675 | /** | |
676 | * cm_suspend_again - Determine whether suspend again or not | |
677 | * | |
678 | * Returns true if the system should be suspended again | |
679 | * Returns false if the system should be woken up | |
680 | */ | |
681 | bool cm_suspend_again(void) | |
682 | { | |
683 | struct charger_manager *cm; | |
684 | bool ret = false; | |
685 | ||
686 | if (!g_desc || !g_desc->rtc_only_wakeup || !g_desc->rtc_only_wakeup() || | |
687 | !cm_rtc_set) | |
688 | return false; | |
689 | ||
690 | if (cm_monitor()) | |
691 | goto out; | |
692 | ||
693 | ret = true; | |
694 | mutex_lock(&cm_list_mtx); | |
695 | list_for_each_entry(cm, &cm_list, entry) { | |
696 | if (cm->status_save_ext_pwr_inserted != is_ext_pwr_online(cm) || | |
bb2a95c2 | 697 | cm->status_save_batt != is_batt_present(cm)) { |
3bb3dbbd | 698 | ret = false; |
bb2a95c2 AL |
699 | break; |
700 | } | |
3bb3dbbd DK |
701 | } |
702 | mutex_unlock(&cm_list_mtx); | |
703 | ||
704 | cm_rtc_set = cm_setup_timer(); | |
705 | out: | |
706 | /* It's about the time when the non-CM appointed timer goes off */ | |
707 | if (rtc_wkalarm_save.enabled) { | |
708 | unsigned long now; | |
709 | struct rtc_time tmp; | |
710 | ||
711 | rtc_read_time(rtc_dev, &tmp); | |
712 | rtc_tm_to_time(&tmp, &now); | |
713 | ||
714 | if (rtc_wkalarm_save_time && | |
715 | now + CM_RTC_SMALL >= rtc_wkalarm_save_time) | |
716 | return false; | |
717 | } | |
718 | return ret; | |
719 | } | |
720 | EXPORT_SYMBOL_GPL(cm_suspend_again); | |
721 | ||
722 | /** | |
723 | * setup_charger_manager - initialize charger_global_desc data | |
724 | * @gd: pointer to instance of charger_global_desc | |
725 | */ | |
726 | int setup_charger_manager(struct charger_global_desc *gd) | |
727 | { | |
728 | if (!gd) | |
729 | return -EINVAL; | |
730 | ||
731 | if (rtc_dev) | |
732 | rtc_class_close(rtc_dev); | |
733 | rtc_dev = NULL; | |
734 | g_desc = NULL; | |
735 | ||
736 | if (!gd->rtc_only_wakeup) { | |
737 | pr_err("The callback rtc_only_wakeup is not given.\n"); | |
738 | return -EINVAL; | |
739 | } | |
740 | ||
741 | if (gd->rtc_name) { | |
742 | rtc_dev = rtc_class_open(gd->rtc_name); | |
743 | if (IS_ERR_OR_NULL(rtc_dev)) { | |
744 | rtc_dev = NULL; | |
745 | /* Retry at probe. RTC may be not registered yet */ | |
746 | } | |
747 | } else { | |
748 | pr_warn("No wakeup timer is given for charger manager." | |
749 | "In-suspend monitoring won't work.\n"); | |
750 | } | |
751 | ||
752 | g_desc = gd; | |
753 | return 0; | |
754 | } | |
755 | EXPORT_SYMBOL_GPL(setup_charger_manager); | |
756 | ||
757 | static int charger_manager_probe(struct platform_device *pdev) | |
758 | { | |
759 | struct charger_desc *desc = dev_get_platdata(&pdev->dev); | |
760 | struct charger_manager *cm; | |
761 | int ret = 0, i = 0; | |
ad3d13ee | 762 | union power_supply_propval val; |
3bb3dbbd DK |
763 | |
764 | if (g_desc && !rtc_dev && g_desc->rtc_name) { | |
765 | rtc_dev = rtc_class_open(g_desc->rtc_name); | |
766 | if (IS_ERR_OR_NULL(rtc_dev)) { | |
767 | rtc_dev = NULL; | |
768 | dev_err(&pdev->dev, "Cannot get RTC %s.\n", | |
769 | g_desc->rtc_name); | |
770 | ret = -ENODEV; | |
771 | goto err_alloc; | |
772 | } | |
773 | } | |
774 | ||
775 | if (!desc) { | |
776 | dev_err(&pdev->dev, "No platform data (desc) found.\n"); | |
777 | ret = -ENODEV; | |
778 | goto err_alloc; | |
779 | } | |
780 | ||
781 | cm = kzalloc(sizeof(struct charger_manager), GFP_KERNEL); | |
782 | if (!cm) { | |
783 | dev_err(&pdev->dev, "Cannot allocate memory.\n"); | |
784 | ret = -ENOMEM; | |
785 | goto err_alloc; | |
786 | } | |
787 | ||
788 | /* Basic Values. Unspecified are Null or 0 */ | |
789 | cm->dev = &pdev->dev; | |
790 | cm->desc = kzalloc(sizeof(struct charger_desc), GFP_KERNEL); | |
791 | if (!cm->desc) { | |
792 | dev_err(&pdev->dev, "Cannot allocate memory.\n"); | |
793 | ret = -ENOMEM; | |
794 | goto err_alloc_desc; | |
795 | } | |
796 | memcpy(cm->desc, desc, sizeof(struct charger_desc)); | |
797 | cm->last_temp_mC = INT_MIN; /* denotes "unmeasured, yet" */ | |
798 | ||
799 | if (!desc->charger_regulators || desc->num_charger_regulators < 1) { | |
800 | ret = -EINVAL; | |
801 | dev_err(&pdev->dev, "charger_regulators undefined.\n"); | |
802 | goto err_no_charger; | |
803 | } | |
804 | ||
805 | if (!desc->psy_charger_stat || !desc->psy_charger_stat[0]) { | |
806 | dev_err(&pdev->dev, "No power supply defined.\n"); | |
807 | ret = -EINVAL; | |
808 | goto err_no_charger_stat; | |
809 | } | |
810 | ||
811 | /* Counting index only */ | |
812 | while (desc->psy_charger_stat[i]) | |
813 | i++; | |
814 | ||
815 | cm->charger_stat = kzalloc(sizeof(struct power_supply *) * (i + 1), | |
816 | GFP_KERNEL); | |
817 | if (!cm->charger_stat) { | |
818 | ret = -ENOMEM; | |
819 | goto err_no_charger_stat; | |
820 | } | |
821 | ||
822 | for (i = 0; desc->psy_charger_stat[i]; i++) { | |
823 | cm->charger_stat[i] = power_supply_get_by_name( | |
824 | desc->psy_charger_stat[i]); | |
825 | if (!cm->charger_stat[i]) { | |
826 | dev_err(&pdev->dev, "Cannot find power supply " | |
827 | "\"%s\"\n", | |
828 | desc->psy_charger_stat[i]); | |
829 | ret = -ENODEV; | |
830 | goto err_chg_stat; | |
831 | } | |
832 | } | |
833 | ||
834 | cm->fuel_gauge = power_supply_get_by_name(desc->psy_fuel_gauge); | |
835 | if (!cm->fuel_gauge) { | |
836 | dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n", | |
837 | desc->psy_fuel_gauge); | |
838 | ret = -ENODEV; | |
839 | goto err_chg_stat; | |
840 | } | |
841 | ||
842 | if (desc->polling_interval_ms == 0 || | |
843 | msecs_to_jiffies(desc->polling_interval_ms) <= CM_JIFFIES_SMALL) { | |
844 | dev_err(&pdev->dev, "polling_interval_ms is too small\n"); | |
845 | ret = -EINVAL; | |
846 | goto err_chg_stat; | |
847 | } | |
848 | ||
849 | if (!desc->temperature_out_of_range) { | |
850 | dev_err(&pdev->dev, "there is no temperature_out_of_range\n"); | |
851 | ret = -EINVAL; | |
852 | goto err_chg_stat; | |
853 | } | |
854 | ||
855 | platform_set_drvdata(pdev, cm); | |
856 | ||
bb2a95c2 AL |
857 | memcpy(&cm->charger_psy, &psy_default, sizeof(psy_default)); |
858 | ||
ad3d13ee | 859 | if (!desc->psy_name) { |
bb2a95c2 | 860 | strncpy(cm->psy_name_buf, psy_default.name, PSY_NAME_MAX); |
ad3d13ee DK |
861 | } else { |
862 | strncpy(cm->psy_name_buf, desc->psy_name, PSY_NAME_MAX); | |
863 | } | |
864 | cm->charger_psy.name = cm->psy_name_buf; | |
865 | ||
866 | /* Allocate for psy properties because they may vary */ | |
867 | cm->charger_psy.properties = kzalloc(sizeof(enum power_supply_property) | |
868 | * (ARRAY_SIZE(default_charger_props) + | |
869 | NUM_CHARGER_PSY_OPTIONAL), | |
870 | GFP_KERNEL); | |
871 | if (!cm->charger_psy.properties) { | |
872 | dev_err(&pdev->dev, "Cannot allocate for psy properties.\n"); | |
873 | ret = -ENOMEM; | |
874 | goto err_chg_stat; | |
875 | } | |
876 | memcpy(cm->charger_psy.properties, default_charger_props, | |
877 | sizeof(enum power_supply_property) * | |
878 | ARRAY_SIZE(default_charger_props)); | |
879 | cm->charger_psy.num_properties = psy_default.num_properties; | |
880 | ||
881 | /* Find which optional psy-properties are available */ | |
882 | if (!cm->fuel_gauge->get_property(cm->fuel_gauge, | |
883 | POWER_SUPPLY_PROP_CHARGE_NOW, &val)) { | |
884 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
885 | POWER_SUPPLY_PROP_CHARGE_NOW; | |
886 | cm->charger_psy.num_properties++; | |
887 | } | |
888 | if (!cm->fuel_gauge->get_property(cm->fuel_gauge, | |
889 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
890 | &val)) { | |
891 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
892 | POWER_SUPPLY_PROP_CURRENT_NOW; | |
893 | cm->charger_psy.num_properties++; | |
894 | } | |
bb2a95c2 | 895 | |
ad3d13ee DK |
896 | if (desc->measure_battery_temp) { |
897 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
898 | POWER_SUPPLY_PROP_TEMP; | |
899 | cm->charger_psy.num_properties++; | |
bb2a95c2 AL |
900 | } else { |
901 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
902 | POWER_SUPPLY_PROP_TEMP_AMBIENT; | |
903 | cm->charger_psy.num_properties++; | |
ad3d13ee DK |
904 | } |
905 | ||
906 | ret = power_supply_register(NULL, &cm->charger_psy); | |
907 | if (ret) { | |
908 | dev_err(&pdev->dev, "Cannot register charger-manager with" | |
909 | " name \"%s\".\n", cm->charger_psy.name); | |
910 | goto err_register; | |
911 | } | |
912 | ||
3bb3dbbd DK |
913 | ret = regulator_bulk_get(&pdev->dev, desc->num_charger_regulators, |
914 | desc->charger_regulators); | |
915 | if (ret) { | |
916 | dev_err(&pdev->dev, "Cannot get charger regulators.\n"); | |
ad3d13ee | 917 | goto err_bulk_get; |
3bb3dbbd DK |
918 | } |
919 | ||
920 | ret = try_charger_enable(cm, true); | |
921 | if (ret) { | |
922 | dev_err(&pdev->dev, "Cannot enable charger regulators\n"); | |
923 | goto err_chg_enable; | |
924 | } | |
925 | ||
926 | /* Add to the list */ | |
927 | mutex_lock(&cm_list_mtx); | |
928 | list_add(&cm->entry, &cm_list); | |
929 | mutex_unlock(&cm_list_mtx); | |
930 | ||
931 | return 0; | |
932 | ||
933 | err_chg_enable: | |
bb2a95c2 AL |
934 | regulator_bulk_free(desc->num_charger_regulators, |
935 | desc->charger_regulators); | |
ad3d13ee DK |
936 | err_bulk_get: |
937 | power_supply_unregister(&cm->charger_psy); | |
938 | err_register: | |
939 | kfree(cm->charger_psy.properties); | |
3bb3dbbd DK |
940 | err_chg_stat: |
941 | kfree(cm->charger_stat); | |
942 | err_no_charger_stat: | |
943 | err_no_charger: | |
944 | kfree(cm->desc); | |
945 | err_alloc_desc: | |
946 | kfree(cm); | |
947 | err_alloc: | |
948 | return ret; | |
949 | } | |
950 | ||
951 | static int __devexit charger_manager_remove(struct platform_device *pdev) | |
952 | { | |
953 | struct charger_manager *cm = platform_get_drvdata(pdev); | |
954 | struct charger_desc *desc = cm->desc; | |
955 | ||
956 | /* Remove from the list */ | |
957 | mutex_lock(&cm_list_mtx); | |
958 | list_del(&cm->entry); | |
959 | mutex_unlock(&cm_list_mtx); | |
960 | ||
bb2a95c2 AL |
961 | regulator_bulk_free(desc->num_charger_regulators, |
962 | desc->charger_regulators); | |
ad3d13ee DK |
963 | power_supply_unregister(&cm->charger_psy); |
964 | kfree(cm->charger_psy.properties); | |
3bb3dbbd DK |
965 | kfree(cm->charger_stat); |
966 | kfree(cm->desc); | |
967 | kfree(cm); | |
968 | ||
969 | return 0; | |
970 | } | |
971 | ||
1bbe24d4 | 972 | static const struct platform_device_id charger_manager_id[] = { |
3bb3dbbd DK |
973 | { "charger-manager", 0 }, |
974 | { }, | |
975 | }; | |
1bbe24d4 | 976 | MODULE_DEVICE_TABLE(platform, charger_manager_id); |
3bb3dbbd DK |
977 | |
978 | static int cm_suspend_prepare(struct device *dev) | |
979 | { | |
bb2a95c2 | 980 | struct charger_manager *cm = dev_get_drvdata(dev); |
3bb3dbbd DK |
981 | |
982 | if (!cm_suspended) { | |
983 | if (rtc_dev) { | |
984 | struct rtc_time tmp; | |
985 | unsigned long now; | |
986 | ||
987 | rtc_read_alarm(rtc_dev, &rtc_wkalarm_save); | |
988 | rtc_read_time(rtc_dev, &tmp); | |
989 | ||
990 | if (rtc_wkalarm_save.enabled) { | |
991 | rtc_tm_to_time(&rtc_wkalarm_save.time, | |
992 | &rtc_wkalarm_save_time); | |
993 | rtc_tm_to_time(&tmp, &now); | |
994 | if (now > rtc_wkalarm_save_time) | |
995 | rtc_wkalarm_save_time = 0; | |
996 | } else { | |
997 | rtc_wkalarm_save_time = 0; | |
998 | } | |
999 | } | |
1000 | cm_suspended = true; | |
1001 | } | |
1002 | ||
1003 | cm->status_save_ext_pwr_inserted = is_ext_pwr_online(cm); | |
1004 | cm->status_save_batt = is_batt_present(cm); | |
1005 | ||
1006 | if (!cm_rtc_set) { | |
1007 | cm_suspend_duration_ms = 0; | |
1008 | cm_rtc_set = cm_setup_timer(); | |
1009 | } | |
1010 | ||
1011 | return 0; | |
1012 | } | |
1013 | ||
1014 | static void cm_suspend_complete(struct device *dev) | |
1015 | { | |
bb2a95c2 | 1016 | struct charger_manager *cm = dev_get_drvdata(dev); |
3bb3dbbd DK |
1017 | |
1018 | if (cm_suspended) { | |
1019 | if (rtc_dev) { | |
1020 | struct rtc_wkalrm tmp; | |
1021 | ||
1022 | rtc_read_alarm(rtc_dev, &tmp); | |
1023 | rtc_wkalarm_save.pending = tmp.pending; | |
1024 | rtc_set_alarm(rtc_dev, &rtc_wkalarm_save); | |
1025 | } | |
1026 | cm_suspended = false; | |
1027 | cm_rtc_set = false; | |
1028 | } | |
1029 | ||
1030 | uevent_notify(cm, NULL); | |
1031 | } | |
1032 | ||
1033 | static const struct dev_pm_ops charger_manager_pm = { | |
1034 | .prepare = cm_suspend_prepare, | |
1035 | .complete = cm_suspend_complete, | |
1036 | }; | |
1037 | ||
1038 | static struct platform_driver charger_manager_driver = { | |
1039 | .driver = { | |
1040 | .name = "charger-manager", | |
1041 | .owner = THIS_MODULE, | |
1042 | .pm = &charger_manager_pm, | |
1043 | }, | |
1044 | .probe = charger_manager_probe, | |
1045 | .remove = __devexit_p(charger_manager_remove), | |
1046 | .id_table = charger_manager_id, | |
1047 | }; | |
1048 | ||
1049 | static int __init charger_manager_init(void) | |
1050 | { | |
1051 | return platform_driver_register(&charger_manager_driver); | |
1052 | } | |
1053 | late_initcall(charger_manager_init); | |
1054 | ||
1055 | static void __exit charger_manager_cleanup(void) | |
1056 | { | |
1057 | platform_driver_unregister(&charger_manager_driver); | |
1058 | } | |
1059 | module_exit(charger_manager_cleanup); | |
1060 | ||
1061 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); | |
1062 | MODULE_DESCRIPTION("Charger Manager"); | |
1063 | MODULE_LICENSE("GPL"); |