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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 | ||
dfeccb12 CC |
26 | static const char * const default_event_names[] = { |
27 | [CM_EVENT_UNKNOWN] = "Unknown", | |
28 | [CM_EVENT_BATT_FULL] = "Battery Full", | |
29 | [CM_EVENT_BATT_IN] = "Battery Inserted", | |
30 | [CM_EVENT_BATT_OUT] = "Battery Pulled Out", | |
31 | [CM_EVENT_EXT_PWR_IN_OUT] = "External Power Attach/Detach", | |
32 | [CM_EVENT_CHG_START_STOP] = "Charging Start/Stop", | |
33 | [CM_EVENT_OTHERS] = "Other battery events" | |
34 | }; | |
35 | ||
3bb3dbbd DK |
36 | /* |
37 | * Regard CM_JIFFIES_SMALL jiffies is small enough to ignore for | |
38 | * delayed works so that we can run delayed works with CM_JIFFIES_SMALL | |
39 | * without any delays. | |
40 | */ | |
41 | #define CM_JIFFIES_SMALL (2) | |
42 | ||
43 | /* If y is valid (> 0) and smaller than x, do x = y */ | |
44 | #define CM_MIN_VALID(x, y) x = (((y > 0) && ((x) > (y))) ? (y) : (x)) | |
45 | ||
46 | /* | |
47 | * Regard CM_RTC_SMALL (sec) is small enough to ignore error in invoking | |
48 | * rtc alarm. It should be 2 or larger | |
49 | */ | |
50 | #define CM_RTC_SMALL (2) | |
51 | ||
52 | #define UEVENT_BUF_SIZE 32 | |
53 | ||
54 | static LIST_HEAD(cm_list); | |
55 | static DEFINE_MUTEX(cm_list_mtx); | |
56 | ||
57 | /* About in-suspend (suspend-again) monitoring */ | |
58 | static struct rtc_device *rtc_dev; | |
59 | /* | |
60 | * Backup RTC alarm | |
61 | * Save the wakeup alarm before entering suspend-to-RAM | |
62 | */ | |
63 | static struct rtc_wkalrm rtc_wkalarm_save; | |
64 | /* Backup RTC alarm time in terms of seconds since 01-01-1970 00:00:00 */ | |
65 | static unsigned long rtc_wkalarm_save_time; | |
66 | static bool cm_suspended; | |
67 | static bool cm_rtc_set; | |
68 | static unsigned long cm_suspend_duration_ms; | |
69 | ||
d829dc75 CC |
70 | /* About normal (not suspended) monitoring */ |
71 | static unsigned long polling_jiffy = ULONG_MAX; /* ULONG_MAX: no polling */ | |
72 | static unsigned long next_polling; /* Next appointed polling time */ | |
73 | static struct workqueue_struct *cm_wq; /* init at driver add */ | |
74 | static struct delayed_work cm_monitor_work; /* init at driver add */ | |
75 | ||
3bb3dbbd DK |
76 | /* Global charger-manager description */ |
77 | static struct charger_global_desc *g_desc; /* init with setup_charger_manager */ | |
78 | ||
79 | /** | |
80 | * is_batt_present - See if the battery presents in place. | |
81 | * @cm: the Charger Manager representing the battery. | |
82 | */ | |
83 | static bool is_batt_present(struct charger_manager *cm) | |
84 | { | |
85 | union power_supply_propval val; | |
86 | bool present = false; | |
87 | int i, ret; | |
88 | ||
89 | switch (cm->desc->battery_present) { | |
d829dc75 CC |
90 | case CM_BATTERY_PRESENT: |
91 | present = true; | |
92 | break; | |
93 | case CM_NO_BATTERY: | |
94 | break; | |
3bb3dbbd DK |
95 | case CM_FUEL_GAUGE: |
96 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
97 | POWER_SUPPLY_PROP_PRESENT, &val); | |
98 | if (ret == 0 && val.intval) | |
99 | present = true; | |
100 | break; | |
101 | case CM_CHARGER_STAT: | |
102 | for (i = 0; cm->charger_stat[i]; i++) { | |
103 | ret = cm->charger_stat[i]->get_property( | |
104 | cm->charger_stat[i], | |
105 | POWER_SUPPLY_PROP_PRESENT, &val); | |
106 | if (ret == 0 && val.intval) { | |
107 | present = true; | |
108 | break; | |
109 | } | |
110 | } | |
111 | break; | |
112 | } | |
113 | ||
114 | return present; | |
115 | } | |
116 | ||
117 | /** | |
118 | * is_ext_pwr_online - See if an external power source is attached to charge | |
119 | * @cm: the Charger Manager representing the battery. | |
120 | * | |
121 | * Returns true if at least one of the chargers of the battery has an external | |
122 | * power source attached to charge the battery regardless of whether it is | |
123 | * actually charging or not. | |
124 | */ | |
125 | static bool is_ext_pwr_online(struct charger_manager *cm) | |
126 | { | |
127 | union power_supply_propval val; | |
128 | bool online = false; | |
129 | int i, ret; | |
130 | ||
131 | /* If at least one of them has one, it's yes. */ | |
132 | for (i = 0; cm->charger_stat[i]; i++) { | |
133 | ret = cm->charger_stat[i]->get_property( | |
134 | cm->charger_stat[i], | |
135 | POWER_SUPPLY_PROP_ONLINE, &val); | |
136 | if (ret == 0 && val.intval) { | |
137 | online = true; | |
138 | break; | |
139 | } | |
140 | } | |
141 | ||
142 | return online; | |
143 | } | |
144 | ||
ad3d13ee DK |
145 | /** |
146 | * get_batt_uV - Get the voltage level of the battery | |
147 | * @cm: the Charger Manager representing the battery. | |
148 | * @uV: the voltage level returned. | |
149 | * | |
150 | * Returns 0 if there is no error. | |
151 | * Returns a negative value on error. | |
152 | */ | |
153 | static int get_batt_uV(struct charger_manager *cm, int *uV) | |
154 | { | |
155 | union power_supply_propval val; | |
156 | int ret; | |
157 | ||
bb2a95c2 | 158 | if (!cm->fuel_gauge) |
ad3d13ee DK |
159 | return -ENODEV; |
160 | ||
bb2a95c2 AL |
161 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, |
162 | POWER_SUPPLY_PROP_VOLTAGE_NOW, &val); | |
ad3d13ee DK |
163 | if (ret) |
164 | return ret; | |
165 | ||
166 | *uV = val.intval; | |
167 | return 0; | |
168 | } | |
169 | ||
3bb3dbbd DK |
170 | /** |
171 | * is_charging - Returns true if the battery is being charged. | |
172 | * @cm: the Charger Manager representing the battery. | |
173 | */ | |
174 | static bool is_charging(struct charger_manager *cm) | |
175 | { | |
176 | int i, ret; | |
177 | bool charging = false; | |
178 | union power_supply_propval val; | |
179 | ||
180 | /* If there is no battery, it cannot be charged */ | |
181 | if (!is_batt_present(cm)) | |
182 | return false; | |
183 | ||
184 | /* If at least one of the charger is charging, return yes */ | |
185 | for (i = 0; cm->charger_stat[i]; i++) { | |
186 | /* 1. The charger sholuld not be DISABLED */ | |
187 | if (cm->emergency_stop) | |
188 | continue; | |
189 | if (!cm->charger_enabled) | |
190 | continue; | |
191 | ||
192 | /* 2. The charger should be online (ext-power) */ | |
193 | ret = cm->charger_stat[i]->get_property( | |
194 | cm->charger_stat[i], | |
195 | POWER_SUPPLY_PROP_ONLINE, &val); | |
196 | if (ret) { | |
197 | dev_warn(cm->dev, "Cannot read ONLINE value from %s.\n", | |
198 | cm->desc->psy_charger_stat[i]); | |
199 | continue; | |
200 | } | |
201 | if (val.intval == 0) | |
202 | continue; | |
203 | ||
204 | /* | |
205 | * 3. The charger should not be FULL, DISCHARGING, | |
206 | * or NOT_CHARGING. | |
207 | */ | |
208 | ret = cm->charger_stat[i]->get_property( | |
209 | cm->charger_stat[i], | |
210 | POWER_SUPPLY_PROP_STATUS, &val); | |
211 | if (ret) { | |
212 | dev_warn(cm->dev, "Cannot read STATUS value from %s.\n", | |
213 | cm->desc->psy_charger_stat[i]); | |
214 | continue; | |
215 | } | |
216 | if (val.intval == POWER_SUPPLY_STATUS_FULL || | |
217 | val.intval == POWER_SUPPLY_STATUS_DISCHARGING || | |
218 | val.intval == POWER_SUPPLY_STATUS_NOT_CHARGING) | |
219 | continue; | |
220 | ||
221 | /* Then, this is charging. */ | |
222 | charging = true; | |
223 | break; | |
224 | } | |
225 | ||
226 | return charging; | |
227 | } | |
228 | ||
229 | /** | |
230 | * is_polling_required - Return true if need to continue polling for this CM. | |
231 | * @cm: the Charger Manager representing the battery. | |
232 | */ | |
233 | static bool is_polling_required(struct charger_manager *cm) | |
234 | { | |
235 | switch (cm->desc->polling_mode) { | |
236 | case CM_POLL_DISABLE: | |
237 | return false; | |
238 | case CM_POLL_ALWAYS: | |
239 | return true; | |
240 | case CM_POLL_EXTERNAL_POWER_ONLY: | |
241 | return is_ext_pwr_online(cm); | |
242 | case CM_POLL_CHARGING_ONLY: | |
243 | return is_charging(cm); | |
244 | default: | |
245 | dev_warn(cm->dev, "Incorrect polling_mode (%d)\n", | |
246 | cm->desc->polling_mode); | |
247 | } | |
248 | ||
249 | return false; | |
250 | } | |
251 | ||
252 | /** | |
253 | * try_charger_enable - Enable/Disable chargers altogether | |
254 | * @cm: the Charger Manager representing the battery. | |
255 | * @enable: true: enable / false: disable | |
256 | * | |
257 | * Note that Charger Manager keeps the charger enabled regardless whether | |
258 | * the charger is charging or not (because battery is full or no external | |
259 | * power source exists) except when CM needs to disable chargers forcibly | |
260 | * bacause of emergency causes; when the battery is overheated or too cold. | |
261 | */ | |
262 | static int try_charger_enable(struct charger_manager *cm, bool enable) | |
263 | { | |
264 | int err = 0, i; | |
265 | struct charger_desc *desc = cm->desc; | |
266 | ||
267 | /* Ignore if it's redundent command */ | |
bb2a95c2 | 268 | if (enable == cm->charger_enabled) |
3bb3dbbd DK |
269 | return 0; |
270 | ||
271 | if (enable) { | |
272 | if (cm->emergency_stop) | |
273 | return -EAGAIN; | |
dbb61fc7 CC |
274 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
275 | err = regulator_enable(desc->charger_regulators[i].consumer); | |
276 | if (err < 0) { | |
277 | dev_warn(cm->dev, | |
278 | "Cannot enable %s regulator\n", | |
279 | desc->charger_regulators[i].regulator_name); | |
280 | } | |
281 | } | |
3bb3dbbd | 282 | } else { |
dbb61fc7 CC |
283 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
284 | err = regulator_disable(desc->charger_regulators[i].consumer); | |
285 | if (err < 0) { | |
286 | dev_warn(cm->dev, | |
287 | "Cannot disable %s regulator\n", | |
288 | desc->charger_regulators[i].regulator_name); | |
289 | } | |
290 | } | |
291 | ||
3bb3dbbd DK |
292 | /* |
293 | * Abnormal battery state - Stop charging forcibly, | |
294 | * even if charger was enabled at the other places | |
295 | */ | |
3bb3dbbd DK |
296 | for (i = 0; i < desc->num_charger_regulators; i++) { |
297 | if (regulator_is_enabled( | |
298 | desc->charger_regulators[i].consumer)) { | |
299 | regulator_force_disable( | |
300 | desc->charger_regulators[i].consumer); | |
301 | dev_warn(cm->dev, | |
302 | "Disable regulator(%s) forcibly.\n", | |
bee737bc | 303 | desc->charger_regulators[i].regulator_name); |
3bb3dbbd DK |
304 | } |
305 | } | |
306 | } | |
307 | ||
308 | if (!err) | |
309 | cm->charger_enabled = enable; | |
310 | ||
311 | return err; | |
312 | } | |
313 | ||
d829dc75 CC |
314 | /** |
315 | * try_charger_restart - Restart charging. | |
316 | * @cm: the Charger Manager representing the battery. | |
317 | * | |
318 | * Restart charging by turning off and on the charger. | |
319 | */ | |
320 | static int try_charger_restart(struct charger_manager *cm) | |
321 | { | |
322 | int err; | |
323 | ||
324 | if (cm->emergency_stop) | |
325 | return -EAGAIN; | |
326 | ||
327 | err = try_charger_enable(cm, false); | |
328 | if (err) | |
329 | return err; | |
330 | ||
331 | return try_charger_enable(cm, true); | |
332 | } | |
333 | ||
3bb3dbbd DK |
334 | /** |
335 | * uevent_notify - Let users know something has changed. | |
336 | * @cm: the Charger Manager representing the battery. | |
337 | * @event: the event string. | |
338 | * | |
339 | * If @event is null, it implies that uevent_notify is called | |
340 | * by resume function. When called in the resume function, cm_suspended | |
341 | * should be already reset to false in order to let uevent_notify | |
342 | * notify the recent event during the suspend to users. While | |
343 | * suspended, uevent_notify does not notify users, but tracks | |
344 | * events so that uevent_notify can notify users later after resumed. | |
345 | */ | |
346 | static void uevent_notify(struct charger_manager *cm, const char *event) | |
347 | { | |
348 | static char env_str[UEVENT_BUF_SIZE + 1] = ""; | |
349 | static char env_str_save[UEVENT_BUF_SIZE + 1] = ""; | |
350 | ||
351 | if (cm_suspended) { | |
352 | /* Nothing in suspended-event buffer */ | |
353 | if (env_str_save[0] == 0) { | |
354 | if (!strncmp(env_str, event, UEVENT_BUF_SIZE)) | |
355 | return; /* status not changed */ | |
356 | strncpy(env_str_save, event, UEVENT_BUF_SIZE); | |
357 | return; | |
358 | } | |
359 | ||
360 | if (!strncmp(env_str_save, event, UEVENT_BUF_SIZE)) | |
361 | return; /* Duplicated. */ | |
bb2a95c2 | 362 | strncpy(env_str_save, event, UEVENT_BUF_SIZE); |
3bb3dbbd DK |
363 | return; |
364 | } | |
365 | ||
366 | if (event == NULL) { | |
367 | /* No messages pending */ | |
368 | if (!env_str_save[0]) | |
369 | return; | |
370 | ||
371 | strncpy(env_str, env_str_save, UEVENT_BUF_SIZE); | |
372 | kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE); | |
373 | env_str_save[0] = 0; | |
374 | ||
375 | return; | |
376 | } | |
377 | ||
378 | /* status not changed */ | |
379 | if (!strncmp(env_str, event, UEVENT_BUF_SIZE)) | |
380 | return; | |
381 | ||
382 | /* save the status and notify the update */ | |
383 | strncpy(env_str, event, UEVENT_BUF_SIZE); | |
384 | kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE); | |
385 | ||
386 | dev_info(cm->dev, event); | |
387 | } | |
388 | ||
d829dc75 CC |
389 | /** |
390 | * fullbatt_vchk - Check voltage drop some times after "FULL" event. | |
391 | * @work: the work_struct appointing the function | |
392 | * | |
393 | * If a user has designated "fullbatt_vchkdrop_ms/uV" values with | |
394 | * charger_desc, Charger Manager checks voltage drop after the battery | |
395 | * "FULL" event. It checks whether the voltage has dropped more than | |
396 | * fullbatt_vchkdrop_uV by calling this function after fullbatt_vchkrop_ms. | |
397 | */ | |
398 | static void fullbatt_vchk(struct work_struct *work) | |
399 | { | |
400 | struct delayed_work *dwork = to_delayed_work(work); | |
401 | struct charger_manager *cm = container_of(dwork, | |
402 | struct charger_manager, fullbatt_vchk_work); | |
403 | struct charger_desc *desc = cm->desc; | |
404 | int batt_uV, err, diff; | |
405 | ||
406 | /* remove the appointment for fullbatt_vchk */ | |
407 | cm->fullbatt_vchk_jiffies_at = 0; | |
408 | ||
409 | if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms) | |
410 | return; | |
411 | ||
412 | err = get_batt_uV(cm, &batt_uV); | |
413 | if (err) { | |
414 | dev_err(cm->dev, "%s: get_batt_uV error(%d).\n", __func__, err); | |
415 | return; | |
416 | } | |
417 | ||
fd65ee5f | 418 | diff = desc->fullbatt_uV; |
d829dc75 CC |
419 | diff -= batt_uV; |
420 | ||
421 | dev_dbg(cm->dev, "VBATT dropped %duV after full-batt.\n", diff); | |
422 | ||
423 | if (diff > desc->fullbatt_vchkdrop_uV) { | |
424 | try_charger_restart(cm); | |
425 | uevent_notify(cm, "Recharge"); | |
426 | } | |
427 | } | |
428 | ||
3bb3dbbd DK |
429 | /** |
430 | * _cm_monitor - Monitor the temperature and return true for exceptions. | |
431 | * @cm: the Charger Manager representing the battery. | |
432 | * | |
433 | * Returns true if there is an event to notify for the battery. | |
434 | * (True if the status of "emergency_stop" changes) | |
435 | */ | |
436 | static bool _cm_monitor(struct charger_manager *cm) | |
437 | { | |
438 | struct charger_desc *desc = cm->desc; | |
439 | int temp = desc->temperature_out_of_range(&cm->last_temp_mC); | |
440 | ||
441 | dev_dbg(cm->dev, "monitoring (%2.2d.%3.3dC)\n", | |
442 | cm->last_temp_mC / 1000, cm->last_temp_mC % 1000); | |
443 | ||
444 | /* It has been stopped or charging already */ | |
445 | if (!!temp == !!cm->emergency_stop) | |
446 | return false; | |
447 | ||
448 | if (temp) { | |
449 | cm->emergency_stop = temp; | |
450 | if (!try_charger_enable(cm, false)) { | |
451 | if (temp > 0) | |
452 | uevent_notify(cm, "OVERHEAT"); | |
453 | else | |
454 | uevent_notify(cm, "COLD"); | |
455 | } | |
456 | } else { | |
457 | cm->emergency_stop = 0; | |
458 | if (!try_charger_enable(cm, true)) | |
459 | uevent_notify(cm, "CHARGING"); | |
460 | } | |
461 | ||
462 | return true; | |
463 | } | |
464 | ||
465 | /** | |
466 | * cm_monitor - Monitor every battery. | |
467 | * | |
468 | * Returns true if there is an event to notify from any of the batteries. | |
469 | * (True if the status of "emergency_stop" changes) | |
470 | */ | |
471 | static bool cm_monitor(void) | |
472 | { | |
473 | bool stop = false; | |
474 | struct charger_manager *cm; | |
475 | ||
476 | mutex_lock(&cm_list_mtx); | |
477 | ||
bb2a95c2 AL |
478 | list_for_each_entry(cm, &cm_list, entry) { |
479 | if (_cm_monitor(cm)) | |
480 | stop = true; | |
481 | } | |
3bb3dbbd DK |
482 | |
483 | mutex_unlock(&cm_list_mtx); | |
484 | ||
485 | return stop; | |
486 | } | |
487 | ||
d829dc75 CC |
488 | /** |
489 | * _setup_polling - Setup the next instance of polling. | |
490 | * @work: work_struct of the function _setup_polling. | |
491 | */ | |
492 | static void _setup_polling(struct work_struct *work) | |
493 | { | |
494 | unsigned long min = ULONG_MAX; | |
495 | struct charger_manager *cm; | |
496 | bool keep_polling = false; | |
497 | unsigned long _next_polling; | |
498 | ||
499 | mutex_lock(&cm_list_mtx); | |
500 | ||
501 | list_for_each_entry(cm, &cm_list, entry) { | |
502 | if (is_polling_required(cm) && cm->desc->polling_interval_ms) { | |
503 | keep_polling = true; | |
504 | ||
505 | if (min > cm->desc->polling_interval_ms) | |
506 | min = cm->desc->polling_interval_ms; | |
507 | } | |
508 | } | |
509 | ||
510 | polling_jiffy = msecs_to_jiffies(min); | |
511 | if (polling_jiffy <= CM_JIFFIES_SMALL) | |
512 | polling_jiffy = CM_JIFFIES_SMALL + 1; | |
513 | ||
514 | if (!keep_polling) | |
515 | polling_jiffy = ULONG_MAX; | |
516 | if (polling_jiffy == ULONG_MAX) | |
517 | goto out; | |
518 | ||
519 | WARN(cm_wq == NULL, "charger-manager: workqueue not initialized" | |
520 | ". try it later. %s\n", __func__); | |
521 | ||
522 | _next_polling = jiffies + polling_jiffy; | |
523 | ||
524 | if (!delayed_work_pending(&cm_monitor_work) || | |
525 | (delayed_work_pending(&cm_monitor_work) && | |
526 | time_after(next_polling, _next_polling))) { | |
527 | cancel_delayed_work_sync(&cm_monitor_work); | |
528 | next_polling = jiffies + polling_jiffy; | |
529 | queue_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy); | |
530 | } | |
531 | ||
532 | out: | |
533 | mutex_unlock(&cm_list_mtx); | |
534 | } | |
535 | static DECLARE_WORK(setup_polling, _setup_polling); | |
536 | ||
537 | /** | |
538 | * cm_monitor_poller - The Monitor / Poller. | |
539 | * @work: work_struct of the function cm_monitor_poller | |
540 | * | |
541 | * During non-suspended state, cm_monitor_poller is used to poll and monitor | |
542 | * the batteries. | |
543 | */ | |
544 | static void cm_monitor_poller(struct work_struct *work) | |
545 | { | |
546 | cm_monitor(); | |
547 | schedule_work(&setup_polling); | |
548 | } | |
549 | ||
dfeccb12 CC |
550 | /** |
551 | * fullbatt_handler - Event handler for CM_EVENT_BATT_FULL | |
552 | * @cm: the Charger Manager representing the battery. | |
553 | */ | |
554 | static void fullbatt_handler(struct charger_manager *cm) | |
555 | { | |
556 | struct charger_desc *desc = cm->desc; | |
557 | ||
558 | if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms) | |
559 | goto out; | |
560 | ||
561 | if (cm_suspended) | |
562 | device_set_wakeup_capable(cm->dev, true); | |
563 | ||
564 | if (delayed_work_pending(&cm->fullbatt_vchk_work)) | |
565 | cancel_delayed_work(&cm->fullbatt_vchk_work); | |
566 | queue_delayed_work(cm_wq, &cm->fullbatt_vchk_work, | |
567 | msecs_to_jiffies(desc->fullbatt_vchkdrop_ms)); | |
568 | cm->fullbatt_vchk_jiffies_at = jiffies + msecs_to_jiffies( | |
569 | desc->fullbatt_vchkdrop_ms); | |
570 | ||
571 | if (cm->fullbatt_vchk_jiffies_at == 0) | |
572 | cm->fullbatt_vchk_jiffies_at = 1; | |
573 | ||
574 | out: | |
575 | dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged.\n"); | |
576 | uevent_notify(cm, default_event_names[CM_EVENT_BATT_FULL]); | |
577 | } | |
578 | ||
579 | /** | |
580 | * battout_handler - Event handler for CM_EVENT_BATT_OUT | |
581 | * @cm: the Charger Manager representing the battery. | |
582 | */ | |
583 | static void battout_handler(struct charger_manager *cm) | |
584 | { | |
585 | if (cm_suspended) | |
586 | device_set_wakeup_capable(cm->dev, true); | |
587 | ||
588 | if (!is_batt_present(cm)) { | |
589 | dev_emerg(cm->dev, "Battery Pulled Out!\n"); | |
590 | uevent_notify(cm, default_event_names[CM_EVENT_BATT_OUT]); | |
591 | } else { | |
592 | uevent_notify(cm, "Battery Reinserted?"); | |
593 | } | |
594 | } | |
595 | ||
596 | /** | |
597 | * misc_event_handler - Handler for other evnets | |
598 | * @cm: the Charger Manager representing the battery. | |
599 | * @type: the Charger Manager representing the battery. | |
600 | */ | |
601 | static void misc_event_handler(struct charger_manager *cm, | |
602 | enum cm_event_types type) | |
603 | { | |
604 | if (cm_suspended) | |
605 | device_set_wakeup_capable(cm->dev, true); | |
606 | ||
607 | if (!delayed_work_pending(&cm_monitor_work) && | |
608 | is_polling_required(cm) && cm->desc->polling_interval_ms) | |
609 | schedule_work(&setup_polling); | |
610 | uevent_notify(cm, default_event_names[type]); | |
611 | } | |
612 | ||
ad3d13ee DK |
613 | static int charger_get_property(struct power_supply *psy, |
614 | enum power_supply_property psp, | |
615 | union power_supply_propval *val) | |
616 | { | |
617 | struct charger_manager *cm = container_of(psy, | |
618 | struct charger_manager, charger_psy); | |
619 | struct charger_desc *desc = cm->desc; | |
df58c04c AV |
620 | int ret = 0; |
621 | int uV; | |
ad3d13ee DK |
622 | |
623 | switch (psp) { | |
624 | case POWER_SUPPLY_PROP_STATUS: | |
625 | if (is_charging(cm)) | |
626 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
627 | else if (is_ext_pwr_online(cm)) | |
628 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
629 | else | |
630 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
631 | break; | |
632 | case POWER_SUPPLY_PROP_HEALTH: | |
633 | if (cm->emergency_stop > 0) | |
634 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
635 | else if (cm->emergency_stop < 0) | |
636 | val->intval = POWER_SUPPLY_HEALTH_COLD; | |
637 | else | |
638 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
639 | break; | |
640 | case POWER_SUPPLY_PROP_PRESENT: | |
641 | if (is_batt_present(cm)) | |
642 | val->intval = 1; | |
643 | else | |
644 | val->intval = 0; | |
645 | break; | |
646 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
df58c04c | 647 | ret = get_batt_uV(cm, &val->intval); |
ad3d13ee DK |
648 | break; |
649 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
650 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
651 | POWER_SUPPLY_PROP_CURRENT_NOW, val); | |
652 | break; | |
653 | case POWER_SUPPLY_PROP_TEMP: | |
654 | /* in thenth of centigrade */ | |
655 | if (cm->last_temp_mC == INT_MIN) | |
656 | desc->temperature_out_of_range(&cm->last_temp_mC); | |
657 | val->intval = cm->last_temp_mC / 100; | |
658 | if (!desc->measure_battery_temp) | |
659 | ret = -ENODEV; | |
660 | break; | |
661 | case POWER_SUPPLY_PROP_TEMP_AMBIENT: | |
662 | /* in thenth of centigrade */ | |
663 | if (cm->last_temp_mC == INT_MIN) | |
664 | desc->temperature_out_of_range(&cm->last_temp_mC); | |
665 | val->intval = cm->last_temp_mC / 100; | |
666 | if (desc->measure_battery_temp) | |
667 | ret = -ENODEV; | |
668 | break; | |
669 | case POWER_SUPPLY_PROP_CAPACITY: | |
670 | if (!cm->fuel_gauge) { | |
671 | ret = -ENODEV; | |
672 | break; | |
673 | } | |
674 | ||
675 | if (!is_batt_present(cm)) { | |
676 | /* There is no battery. Assume 100% */ | |
677 | val->intval = 100; | |
678 | break; | |
679 | } | |
680 | ||
681 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
682 | POWER_SUPPLY_PROP_CAPACITY, val); | |
683 | if (ret) | |
684 | break; | |
685 | ||
686 | if (val->intval > 100) { | |
687 | val->intval = 100; | |
688 | break; | |
689 | } | |
690 | if (val->intval < 0) | |
691 | val->intval = 0; | |
692 | ||
693 | /* Do not adjust SOC when charging: voltage is overrated */ | |
694 | if (is_charging(cm)) | |
695 | break; | |
696 | ||
697 | /* | |
698 | * If the capacity value is inconsistent, calibrate it base on | |
699 | * the battery voltage values and the thresholds given as desc | |
700 | */ | |
701 | ret = get_batt_uV(cm, &uV); | |
702 | if (ret) { | |
703 | /* Voltage information not available. No calibration */ | |
704 | ret = 0; | |
705 | break; | |
706 | } | |
707 | ||
708 | if (desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV && | |
709 | !is_charging(cm)) { | |
710 | val->intval = 100; | |
711 | break; | |
712 | } | |
713 | ||
714 | break; | |
715 | case POWER_SUPPLY_PROP_ONLINE: | |
716 | if (is_ext_pwr_online(cm)) | |
717 | val->intval = 1; | |
718 | else | |
719 | val->intval = 0; | |
720 | break; | |
721 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
722 | if (cm->fuel_gauge) { | |
723 | if (cm->fuel_gauge->get_property(cm->fuel_gauge, | |
724 | POWER_SUPPLY_PROP_CHARGE_FULL, val) == 0) | |
725 | break; | |
726 | } | |
727 | ||
728 | if (is_ext_pwr_online(cm)) { | |
729 | /* Not full if it's charging. */ | |
730 | if (is_charging(cm)) { | |
731 | val->intval = 0; | |
732 | break; | |
733 | } | |
734 | /* | |
735 | * Full if it's powered but not charging andi | |
736 | * not forced stop by emergency | |
737 | */ | |
738 | if (!cm->emergency_stop) { | |
739 | val->intval = 1; | |
740 | break; | |
741 | } | |
742 | } | |
743 | ||
744 | /* Full if it's over the fullbatt voltage */ | |
745 | ret = get_batt_uV(cm, &uV); | |
746 | if (!ret && desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV && | |
747 | !is_charging(cm)) { | |
748 | val->intval = 1; | |
749 | break; | |
750 | } | |
751 | ||
752 | /* Full if the cap is 100 */ | |
753 | if (cm->fuel_gauge) { | |
754 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
755 | POWER_SUPPLY_PROP_CAPACITY, val); | |
756 | if (!ret && val->intval >= 100 && !is_charging(cm)) { | |
757 | val->intval = 1; | |
758 | break; | |
759 | } | |
760 | } | |
761 | ||
762 | val->intval = 0; | |
763 | ret = 0; | |
764 | break; | |
765 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
766 | if (is_charging(cm)) { | |
767 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
768 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
769 | val); | |
770 | if (ret) { | |
771 | val->intval = 1; | |
772 | ret = 0; | |
773 | } else { | |
774 | /* If CHARGE_NOW is supplied, use it */ | |
775 | val->intval = (val->intval > 0) ? | |
776 | val->intval : 1; | |
777 | } | |
778 | } else { | |
779 | val->intval = 0; | |
780 | } | |
781 | break; | |
782 | default: | |
783 | return -EINVAL; | |
784 | } | |
785 | return ret; | |
786 | } | |
787 | ||
788 | #define NUM_CHARGER_PSY_OPTIONAL (4) | |
789 | static enum power_supply_property default_charger_props[] = { | |
790 | /* Guaranteed to provide */ | |
791 | POWER_SUPPLY_PROP_STATUS, | |
792 | POWER_SUPPLY_PROP_HEALTH, | |
793 | POWER_SUPPLY_PROP_PRESENT, | |
794 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
795 | POWER_SUPPLY_PROP_CAPACITY, | |
796 | POWER_SUPPLY_PROP_ONLINE, | |
797 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
798 | /* | |
799 | * Optional properties are: | |
800 | * POWER_SUPPLY_PROP_CHARGE_NOW, | |
801 | * POWER_SUPPLY_PROP_CURRENT_NOW, | |
802 | * POWER_SUPPLY_PROP_TEMP, and | |
803 | * POWER_SUPPLY_PROP_TEMP_AMBIENT, | |
804 | */ | |
805 | }; | |
806 | ||
807 | static struct power_supply psy_default = { | |
808 | .name = "battery", | |
809 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
810 | .properties = default_charger_props, | |
811 | .num_properties = ARRAY_SIZE(default_charger_props), | |
812 | .get_property = charger_get_property, | |
813 | }; | |
814 | ||
3bb3dbbd DK |
815 | /** |
816 | * cm_setup_timer - For in-suspend monitoring setup wakeup alarm | |
817 | * for suspend_again. | |
818 | * | |
819 | * Returns true if the alarm is set for Charger Manager to use. | |
820 | * Returns false if | |
821 | * cm_setup_timer fails to set an alarm, | |
822 | * cm_setup_timer does not need to set an alarm for Charger Manager, | |
823 | * or an alarm previously configured is to be used. | |
824 | */ | |
825 | static bool cm_setup_timer(void) | |
826 | { | |
827 | struct charger_manager *cm; | |
828 | unsigned int wakeup_ms = UINT_MAX; | |
829 | bool ret = false; | |
830 | ||
831 | mutex_lock(&cm_list_mtx); | |
832 | ||
833 | list_for_each_entry(cm, &cm_list, entry) { | |
d829dc75 CC |
834 | unsigned int fbchk_ms = 0; |
835 | ||
836 | /* fullbatt_vchk is required. setup timer for that */ | |
837 | if (cm->fullbatt_vchk_jiffies_at) { | |
838 | fbchk_ms = jiffies_to_msecs(cm->fullbatt_vchk_jiffies_at | |
839 | - jiffies); | |
840 | if (time_is_before_eq_jiffies( | |
841 | cm->fullbatt_vchk_jiffies_at) || | |
842 | msecs_to_jiffies(fbchk_ms) < CM_JIFFIES_SMALL) { | |
843 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
844 | fbchk_ms = 0; | |
845 | } | |
846 | } | |
847 | CM_MIN_VALID(wakeup_ms, fbchk_ms); | |
848 | ||
3bb3dbbd DK |
849 | /* Skip if polling is not required for this CM */ |
850 | if (!is_polling_required(cm) && !cm->emergency_stop) | |
851 | continue; | |
852 | if (cm->desc->polling_interval_ms == 0) | |
853 | continue; | |
854 | CM_MIN_VALID(wakeup_ms, cm->desc->polling_interval_ms); | |
855 | } | |
856 | ||
857 | mutex_unlock(&cm_list_mtx); | |
858 | ||
859 | if (wakeup_ms < UINT_MAX && wakeup_ms > 0) { | |
860 | pr_info("Charger Manager wakeup timer: %u ms.\n", wakeup_ms); | |
861 | if (rtc_dev) { | |
862 | struct rtc_wkalrm tmp; | |
863 | unsigned long time, now; | |
864 | unsigned long add = DIV_ROUND_UP(wakeup_ms, 1000); | |
865 | ||
866 | /* | |
867 | * Set alarm with the polling interval (wakeup_ms) | |
868 | * except when rtc_wkalarm_save comes first. | |
869 | * However, the alarm time should be NOW + | |
870 | * CM_RTC_SMALL or later. | |
871 | */ | |
872 | tmp.enabled = 1; | |
873 | rtc_read_time(rtc_dev, &tmp.time); | |
874 | rtc_tm_to_time(&tmp.time, &now); | |
875 | if (add < CM_RTC_SMALL) | |
876 | add = CM_RTC_SMALL; | |
877 | time = now + add; | |
878 | ||
879 | ret = true; | |
880 | ||
881 | if (rtc_wkalarm_save.enabled && | |
882 | rtc_wkalarm_save_time && | |
883 | rtc_wkalarm_save_time < time) { | |
884 | if (rtc_wkalarm_save_time < now + CM_RTC_SMALL) | |
885 | time = now + CM_RTC_SMALL; | |
886 | else | |
887 | time = rtc_wkalarm_save_time; | |
888 | ||
889 | /* The timer is not appointed by CM */ | |
890 | ret = false; | |
891 | } | |
892 | ||
893 | pr_info("Waking up after %lu secs.\n", | |
894 | time - now); | |
895 | ||
896 | rtc_time_to_tm(time, &tmp.time); | |
897 | rtc_set_alarm(rtc_dev, &tmp); | |
898 | cm_suspend_duration_ms += wakeup_ms; | |
899 | return ret; | |
900 | } | |
901 | } | |
902 | ||
903 | if (rtc_dev) | |
904 | rtc_set_alarm(rtc_dev, &rtc_wkalarm_save); | |
905 | return false; | |
906 | } | |
907 | ||
d829dc75 CC |
908 | static void _cm_fbchk_in_suspend(struct charger_manager *cm) |
909 | { | |
910 | unsigned long jiffy_now = jiffies; | |
911 | ||
912 | if (!cm->fullbatt_vchk_jiffies_at) | |
913 | return; | |
914 | ||
915 | if (g_desc && g_desc->assume_timer_stops_in_suspend) | |
916 | jiffy_now += msecs_to_jiffies(cm_suspend_duration_ms); | |
917 | ||
918 | /* Execute now if it's going to be executed not too long after */ | |
919 | jiffy_now += CM_JIFFIES_SMALL; | |
920 | ||
921 | if (time_after_eq(jiffy_now, cm->fullbatt_vchk_jiffies_at)) | |
922 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
923 | } | |
924 | ||
3bb3dbbd DK |
925 | /** |
926 | * cm_suspend_again - Determine whether suspend again or not | |
927 | * | |
928 | * Returns true if the system should be suspended again | |
929 | * Returns false if the system should be woken up | |
930 | */ | |
931 | bool cm_suspend_again(void) | |
932 | { | |
933 | struct charger_manager *cm; | |
934 | bool ret = false; | |
935 | ||
936 | if (!g_desc || !g_desc->rtc_only_wakeup || !g_desc->rtc_only_wakeup() || | |
937 | !cm_rtc_set) | |
938 | return false; | |
939 | ||
940 | if (cm_monitor()) | |
941 | goto out; | |
942 | ||
943 | ret = true; | |
944 | mutex_lock(&cm_list_mtx); | |
945 | list_for_each_entry(cm, &cm_list, entry) { | |
d829dc75 CC |
946 | _cm_fbchk_in_suspend(cm); |
947 | ||
3bb3dbbd | 948 | if (cm->status_save_ext_pwr_inserted != is_ext_pwr_online(cm) || |
bb2a95c2 | 949 | cm->status_save_batt != is_batt_present(cm)) { |
3bb3dbbd | 950 | ret = false; |
bb2a95c2 AL |
951 | break; |
952 | } | |
3bb3dbbd DK |
953 | } |
954 | mutex_unlock(&cm_list_mtx); | |
955 | ||
956 | cm_rtc_set = cm_setup_timer(); | |
957 | out: | |
958 | /* It's about the time when the non-CM appointed timer goes off */ | |
959 | if (rtc_wkalarm_save.enabled) { | |
960 | unsigned long now; | |
961 | struct rtc_time tmp; | |
962 | ||
963 | rtc_read_time(rtc_dev, &tmp); | |
964 | rtc_tm_to_time(&tmp, &now); | |
965 | ||
966 | if (rtc_wkalarm_save_time && | |
967 | now + CM_RTC_SMALL >= rtc_wkalarm_save_time) | |
968 | return false; | |
969 | } | |
970 | return ret; | |
971 | } | |
972 | EXPORT_SYMBOL_GPL(cm_suspend_again); | |
973 | ||
974 | /** | |
975 | * setup_charger_manager - initialize charger_global_desc data | |
976 | * @gd: pointer to instance of charger_global_desc | |
977 | */ | |
978 | int setup_charger_manager(struct charger_global_desc *gd) | |
979 | { | |
980 | if (!gd) | |
981 | return -EINVAL; | |
982 | ||
983 | if (rtc_dev) | |
984 | rtc_class_close(rtc_dev); | |
985 | rtc_dev = NULL; | |
986 | g_desc = NULL; | |
987 | ||
988 | if (!gd->rtc_only_wakeup) { | |
989 | pr_err("The callback rtc_only_wakeup is not given.\n"); | |
990 | return -EINVAL; | |
991 | } | |
992 | ||
993 | if (gd->rtc_name) { | |
994 | rtc_dev = rtc_class_open(gd->rtc_name); | |
995 | if (IS_ERR_OR_NULL(rtc_dev)) { | |
996 | rtc_dev = NULL; | |
997 | /* Retry at probe. RTC may be not registered yet */ | |
998 | } | |
999 | } else { | |
1000 | pr_warn("No wakeup timer is given for charger manager." | |
1001 | "In-suspend monitoring won't work.\n"); | |
1002 | } | |
1003 | ||
1004 | g_desc = gd; | |
1005 | return 0; | |
1006 | } | |
1007 | EXPORT_SYMBOL_GPL(setup_charger_manager); | |
1008 | ||
bee737bc CC |
1009 | /** |
1010 | * charger_extcon_work - enable/diable charger according to the state | |
1011 | * of charger cable | |
1012 | * | |
1013 | * @work: work_struct of the function charger_extcon_work. | |
1014 | */ | |
1015 | static void charger_extcon_work(struct work_struct *work) | |
1016 | { | |
1017 | struct charger_cable *cable = | |
1018 | container_of(work, struct charger_cable, wq); | |
45cd4fb2 CC |
1019 | int ret; |
1020 | ||
1021 | if (cable->attached && cable->min_uA != 0 && cable->max_uA != 0) { | |
1022 | ret = regulator_set_current_limit(cable->charger->consumer, | |
1023 | cable->min_uA, cable->max_uA); | |
1024 | if (ret < 0) { | |
1025 | pr_err("Cannot set current limit of %s (%s)\n", | |
1026 | cable->charger->regulator_name, cable->name); | |
1027 | return; | |
1028 | } | |
1029 | ||
1030 | pr_info("Set current limit of %s : %duA ~ %duA\n", | |
1031 | cable->charger->regulator_name, | |
1032 | cable->min_uA, cable->max_uA); | |
1033 | } | |
bee737bc CC |
1034 | |
1035 | try_charger_enable(cable->cm, cable->attached); | |
1036 | } | |
1037 | ||
1038 | /** | |
1039 | * charger_extcon_notifier - receive the state of charger cable | |
1040 | * when registered cable is attached or detached. | |
1041 | * | |
1042 | * @self: the notifier block of the charger_extcon_notifier. | |
1043 | * @event: the cable state. | |
1044 | * @ptr: the data pointer of notifier block. | |
1045 | */ | |
1046 | static int charger_extcon_notifier(struct notifier_block *self, | |
1047 | unsigned long event, void *ptr) | |
1048 | { | |
1049 | struct charger_cable *cable = | |
1050 | container_of(self, struct charger_cable, nb); | |
1051 | ||
1052 | cable->attached = event; | |
1053 | schedule_work(&cable->wq); | |
1054 | ||
1055 | return NOTIFY_DONE; | |
1056 | } | |
1057 | ||
1058 | /** | |
1059 | * charger_extcon_init - register external connector to use it | |
1060 | * as the charger cable | |
1061 | * | |
1062 | * @cm: the Charger Manager representing the battery. | |
1063 | * @cable: the Charger cable representing the external connector. | |
1064 | */ | |
1065 | static int charger_extcon_init(struct charger_manager *cm, | |
1066 | struct charger_cable *cable) | |
1067 | { | |
1068 | int ret = 0; | |
1069 | ||
1070 | /* | |
1071 | * Charger manager use Extcon framework to identify | |
1072 | * the charger cable among various external connector | |
1073 | * cable (e.g., TA, USB, MHL, Dock). | |
1074 | */ | |
1075 | INIT_WORK(&cable->wq, charger_extcon_work); | |
1076 | cable->nb.notifier_call = charger_extcon_notifier; | |
1077 | ret = extcon_register_interest(&cable->extcon_dev, | |
1078 | cable->extcon_name, cable->name, &cable->nb); | |
1079 | if (ret < 0) { | |
1080 | pr_info("Cannot register extcon_dev for %s(cable: %s).\n", | |
1081 | cable->extcon_name, | |
1082 | cable->name); | |
1083 | ret = -EINVAL; | |
1084 | } | |
1085 | ||
1086 | return ret; | |
1087 | } | |
1088 | ||
3bb3dbbd DK |
1089 | static int charger_manager_probe(struct platform_device *pdev) |
1090 | { | |
1091 | struct charger_desc *desc = dev_get_platdata(&pdev->dev); | |
1092 | struct charger_manager *cm; | |
1093 | int ret = 0, i = 0; | |
bee737bc | 1094 | int j = 0; |
ad3d13ee | 1095 | union power_supply_propval val; |
3bb3dbbd DK |
1096 | |
1097 | if (g_desc && !rtc_dev && g_desc->rtc_name) { | |
1098 | rtc_dev = rtc_class_open(g_desc->rtc_name); | |
1099 | if (IS_ERR_OR_NULL(rtc_dev)) { | |
1100 | rtc_dev = NULL; | |
1101 | dev_err(&pdev->dev, "Cannot get RTC %s.\n", | |
1102 | g_desc->rtc_name); | |
1103 | ret = -ENODEV; | |
1104 | goto err_alloc; | |
1105 | } | |
1106 | } | |
1107 | ||
1108 | if (!desc) { | |
1109 | dev_err(&pdev->dev, "No platform data (desc) found.\n"); | |
1110 | ret = -ENODEV; | |
1111 | goto err_alloc; | |
1112 | } | |
1113 | ||
1114 | cm = kzalloc(sizeof(struct charger_manager), GFP_KERNEL); | |
1115 | if (!cm) { | |
1116 | dev_err(&pdev->dev, "Cannot allocate memory.\n"); | |
1117 | ret = -ENOMEM; | |
1118 | goto err_alloc; | |
1119 | } | |
1120 | ||
1121 | /* Basic Values. Unspecified are Null or 0 */ | |
1122 | cm->dev = &pdev->dev; | |
1123 | cm->desc = kzalloc(sizeof(struct charger_desc), GFP_KERNEL); | |
1124 | if (!cm->desc) { | |
1125 | dev_err(&pdev->dev, "Cannot allocate memory.\n"); | |
1126 | ret = -ENOMEM; | |
1127 | goto err_alloc_desc; | |
1128 | } | |
1129 | memcpy(cm->desc, desc, sizeof(struct charger_desc)); | |
1130 | cm->last_temp_mC = INT_MIN; /* denotes "unmeasured, yet" */ | |
1131 | ||
d829dc75 CC |
1132 | /* |
1133 | * The following two do not need to be errors. | |
1134 | * Users may intentionally ignore those two features. | |
1135 | */ | |
1136 | if (desc->fullbatt_uV == 0) { | |
1137 | dev_info(&pdev->dev, "Ignoring full-battery voltage threshold" | |
1138 | " as it is not supplied."); | |
1139 | } | |
1140 | if (!desc->fullbatt_vchkdrop_ms || !desc->fullbatt_vchkdrop_uV) { | |
1141 | dev_info(&pdev->dev, "Disabling full-battery voltage drop " | |
1142 | "checking mechanism as it is not supplied."); | |
1143 | desc->fullbatt_vchkdrop_ms = 0; | |
1144 | desc->fullbatt_vchkdrop_uV = 0; | |
1145 | } | |
1146 | ||
3bb3dbbd DK |
1147 | if (!desc->charger_regulators || desc->num_charger_regulators < 1) { |
1148 | ret = -EINVAL; | |
1149 | dev_err(&pdev->dev, "charger_regulators undefined.\n"); | |
1150 | goto err_no_charger; | |
1151 | } | |
1152 | ||
1153 | if (!desc->psy_charger_stat || !desc->psy_charger_stat[0]) { | |
1154 | dev_err(&pdev->dev, "No power supply defined.\n"); | |
1155 | ret = -EINVAL; | |
1156 | goto err_no_charger_stat; | |
1157 | } | |
1158 | ||
1159 | /* Counting index only */ | |
1160 | while (desc->psy_charger_stat[i]) | |
1161 | i++; | |
1162 | ||
1163 | cm->charger_stat = kzalloc(sizeof(struct power_supply *) * (i + 1), | |
1164 | GFP_KERNEL); | |
1165 | if (!cm->charger_stat) { | |
1166 | ret = -ENOMEM; | |
1167 | goto err_no_charger_stat; | |
1168 | } | |
1169 | ||
1170 | for (i = 0; desc->psy_charger_stat[i]; i++) { | |
1171 | cm->charger_stat[i] = power_supply_get_by_name( | |
1172 | desc->psy_charger_stat[i]); | |
1173 | if (!cm->charger_stat[i]) { | |
1174 | dev_err(&pdev->dev, "Cannot find power supply " | |
1175 | "\"%s\"\n", | |
1176 | desc->psy_charger_stat[i]); | |
1177 | ret = -ENODEV; | |
1178 | goto err_chg_stat; | |
1179 | } | |
1180 | } | |
1181 | ||
1182 | cm->fuel_gauge = power_supply_get_by_name(desc->psy_fuel_gauge); | |
1183 | if (!cm->fuel_gauge) { | |
1184 | dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n", | |
1185 | desc->psy_fuel_gauge); | |
1186 | ret = -ENODEV; | |
1187 | goto err_chg_stat; | |
1188 | } | |
1189 | ||
1190 | if (desc->polling_interval_ms == 0 || | |
1191 | msecs_to_jiffies(desc->polling_interval_ms) <= CM_JIFFIES_SMALL) { | |
1192 | dev_err(&pdev->dev, "polling_interval_ms is too small\n"); | |
1193 | ret = -EINVAL; | |
1194 | goto err_chg_stat; | |
1195 | } | |
1196 | ||
1197 | if (!desc->temperature_out_of_range) { | |
1198 | dev_err(&pdev->dev, "there is no temperature_out_of_range\n"); | |
1199 | ret = -EINVAL; | |
1200 | goto err_chg_stat; | |
1201 | } | |
1202 | ||
1203 | platform_set_drvdata(pdev, cm); | |
1204 | ||
bb2a95c2 AL |
1205 | memcpy(&cm->charger_psy, &psy_default, sizeof(psy_default)); |
1206 | ||
ad3d13ee | 1207 | if (!desc->psy_name) { |
bb2a95c2 | 1208 | strncpy(cm->psy_name_buf, psy_default.name, PSY_NAME_MAX); |
ad3d13ee DK |
1209 | } else { |
1210 | strncpy(cm->psy_name_buf, desc->psy_name, PSY_NAME_MAX); | |
1211 | } | |
1212 | cm->charger_psy.name = cm->psy_name_buf; | |
1213 | ||
1214 | /* Allocate for psy properties because they may vary */ | |
1215 | cm->charger_psy.properties = kzalloc(sizeof(enum power_supply_property) | |
1216 | * (ARRAY_SIZE(default_charger_props) + | |
1217 | NUM_CHARGER_PSY_OPTIONAL), | |
1218 | GFP_KERNEL); | |
1219 | if (!cm->charger_psy.properties) { | |
1220 | dev_err(&pdev->dev, "Cannot allocate for psy properties.\n"); | |
1221 | ret = -ENOMEM; | |
1222 | goto err_chg_stat; | |
1223 | } | |
1224 | memcpy(cm->charger_psy.properties, default_charger_props, | |
1225 | sizeof(enum power_supply_property) * | |
1226 | ARRAY_SIZE(default_charger_props)); | |
1227 | cm->charger_psy.num_properties = psy_default.num_properties; | |
1228 | ||
1229 | /* Find which optional psy-properties are available */ | |
1230 | if (!cm->fuel_gauge->get_property(cm->fuel_gauge, | |
1231 | POWER_SUPPLY_PROP_CHARGE_NOW, &val)) { | |
1232 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1233 | POWER_SUPPLY_PROP_CHARGE_NOW; | |
1234 | cm->charger_psy.num_properties++; | |
1235 | } | |
1236 | if (!cm->fuel_gauge->get_property(cm->fuel_gauge, | |
1237 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
1238 | &val)) { | |
1239 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1240 | POWER_SUPPLY_PROP_CURRENT_NOW; | |
1241 | cm->charger_psy.num_properties++; | |
1242 | } | |
bb2a95c2 | 1243 | |
ad3d13ee DK |
1244 | if (desc->measure_battery_temp) { |
1245 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1246 | POWER_SUPPLY_PROP_TEMP; | |
1247 | cm->charger_psy.num_properties++; | |
bb2a95c2 AL |
1248 | } else { |
1249 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1250 | POWER_SUPPLY_PROP_TEMP_AMBIENT; | |
1251 | cm->charger_psy.num_properties++; | |
ad3d13ee DK |
1252 | } |
1253 | ||
d829dc75 CC |
1254 | INIT_DELAYED_WORK(&cm->fullbatt_vchk_work, fullbatt_vchk); |
1255 | ||
ad3d13ee DK |
1256 | ret = power_supply_register(NULL, &cm->charger_psy); |
1257 | if (ret) { | |
1258 | dev_err(&pdev->dev, "Cannot register charger-manager with" | |
1259 | " name \"%s\".\n", cm->charger_psy.name); | |
1260 | goto err_register; | |
1261 | } | |
1262 | ||
bee737bc CC |
1263 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
1264 | struct charger_regulator *charger | |
1265 | = &desc->charger_regulators[i]; | |
1266 | ||
1267 | charger->consumer = regulator_get(&pdev->dev, | |
1268 | charger->regulator_name); | |
1269 | if (charger->consumer == NULL) { | |
1270 | dev_err(&pdev->dev, "Cannot find charger(%s)n", | |
1271 | charger->regulator_name); | |
1272 | ret = -EINVAL; | |
1273 | goto err_chg_get; | |
1274 | } | |
1275 | ||
1276 | for (j = 0 ; j < charger->num_cables ; j++) { | |
1277 | struct charger_cable *cable = &charger->cables[j]; | |
1278 | ||
1279 | ret = charger_extcon_init(cm, cable); | |
1280 | if (ret < 0) { | |
1281 | dev_err(&pdev->dev, "Cannot find charger(%s)n", | |
1282 | charger->regulator_name); | |
1283 | goto err_extcon; | |
1284 | } | |
1285 | cable->charger = charger; | |
1286 | cable->cm = cm; | |
1287 | } | |
3bb3dbbd DK |
1288 | } |
1289 | ||
1290 | ret = try_charger_enable(cm, true); | |
1291 | if (ret) { | |
1292 | dev_err(&pdev->dev, "Cannot enable charger regulators\n"); | |
1293 | goto err_chg_enable; | |
1294 | } | |
1295 | ||
1296 | /* Add to the list */ | |
1297 | mutex_lock(&cm_list_mtx); | |
1298 | list_add(&cm->entry, &cm_list); | |
1299 | mutex_unlock(&cm_list_mtx); | |
1300 | ||
dfeccb12 CC |
1301 | /* |
1302 | * Charger-manager is capable of waking up the systme from sleep | |
1303 | * when event is happend through cm_notify_event() | |
1304 | */ | |
1305 | device_init_wakeup(&pdev->dev, true); | |
1306 | device_set_wakeup_capable(&pdev->dev, false); | |
1307 | ||
d829dc75 CC |
1308 | schedule_work(&setup_polling); |
1309 | ||
3bb3dbbd DK |
1310 | return 0; |
1311 | ||
1312 | err_chg_enable: | |
bee737bc CC |
1313 | err_extcon: |
1314 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { | |
1315 | struct charger_regulator *charger | |
1316 | = &desc->charger_regulators[i]; | |
1317 | for (j = 0 ; j < charger->num_cables ; j++) { | |
1318 | struct charger_cable *cable = &charger->cables[j]; | |
1319 | extcon_unregister_interest(&cable->extcon_dev); | |
1320 | } | |
1321 | } | |
1322 | err_chg_get: | |
1323 | for (i = 0 ; i < desc->num_charger_regulators ; i++) | |
1324 | regulator_put(desc->charger_regulators[i].consumer); | |
1325 | ||
ad3d13ee DK |
1326 | power_supply_unregister(&cm->charger_psy); |
1327 | err_register: | |
1328 | kfree(cm->charger_psy.properties); | |
3bb3dbbd DK |
1329 | err_chg_stat: |
1330 | kfree(cm->charger_stat); | |
1331 | err_no_charger_stat: | |
1332 | err_no_charger: | |
1333 | kfree(cm->desc); | |
1334 | err_alloc_desc: | |
1335 | kfree(cm); | |
1336 | err_alloc: | |
1337 | return ret; | |
1338 | } | |
1339 | ||
1340 | static int __devexit charger_manager_remove(struct platform_device *pdev) | |
1341 | { | |
1342 | struct charger_manager *cm = platform_get_drvdata(pdev); | |
1343 | struct charger_desc *desc = cm->desc; | |
bee737bc CC |
1344 | int i = 0; |
1345 | int j = 0; | |
3bb3dbbd DK |
1346 | |
1347 | /* Remove from the list */ | |
1348 | mutex_lock(&cm_list_mtx); | |
1349 | list_del(&cm->entry); | |
1350 | mutex_unlock(&cm_list_mtx); | |
1351 | ||
d829dc75 CC |
1352 | if (work_pending(&setup_polling)) |
1353 | cancel_work_sync(&setup_polling); | |
1354 | if (delayed_work_pending(&cm_monitor_work)) | |
1355 | cancel_delayed_work_sync(&cm_monitor_work); | |
1356 | ||
bee737bc CC |
1357 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
1358 | struct charger_regulator *charger | |
1359 | = &desc->charger_regulators[i]; | |
1360 | for (j = 0 ; j < charger->num_cables ; j++) { | |
1361 | struct charger_cable *cable = &charger->cables[j]; | |
1362 | extcon_unregister_interest(&cable->extcon_dev); | |
1363 | } | |
1364 | } | |
1365 | ||
1366 | for (i = 0 ; i < desc->num_charger_regulators ; i++) | |
1367 | regulator_put(desc->charger_regulators[i].consumer); | |
1368 | ||
ad3d13ee | 1369 | power_supply_unregister(&cm->charger_psy); |
d829dc75 CC |
1370 | |
1371 | try_charger_enable(cm, false); | |
1372 | ||
ad3d13ee | 1373 | kfree(cm->charger_psy.properties); |
3bb3dbbd DK |
1374 | kfree(cm->charger_stat); |
1375 | kfree(cm->desc); | |
1376 | kfree(cm); | |
1377 | ||
1378 | return 0; | |
1379 | } | |
1380 | ||
1bbe24d4 | 1381 | static const struct platform_device_id charger_manager_id[] = { |
3bb3dbbd DK |
1382 | { "charger-manager", 0 }, |
1383 | { }, | |
1384 | }; | |
1bbe24d4 | 1385 | MODULE_DEVICE_TABLE(platform, charger_manager_id); |
3bb3dbbd | 1386 | |
dfeccb12 CC |
1387 | static int cm_suspend_noirq(struct device *dev) |
1388 | { | |
1389 | int ret = 0; | |
1390 | ||
1391 | if (device_may_wakeup(dev)) { | |
1392 | device_set_wakeup_capable(dev, false); | |
1393 | ret = -EAGAIN; | |
1394 | } | |
1395 | ||
1396 | return ret; | |
1397 | } | |
1398 | ||
3bb3dbbd DK |
1399 | static int cm_suspend_prepare(struct device *dev) |
1400 | { | |
bb2a95c2 | 1401 | struct charger_manager *cm = dev_get_drvdata(dev); |
3bb3dbbd DK |
1402 | |
1403 | if (!cm_suspended) { | |
1404 | if (rtc_dev) { | |
1405 | struct rtc_time tmp; | |
1406 | unsigned long now; | |
1407 | ||
1408 | rtc_read_alarm(rtc_dev, &rtc_wkalarm_save); | |
1409 | rtc_read_time(rtc_dev, &tmp); | |
1410 | ||
1411 | if (rtc_wkalarm_save.enabled) { | |
1412 | rtc_tm_to_time(&rtc_wkalarm_save.time, | |
1413 | &rtc_wkalarm_save_time); | |
1414 | rtc_tm_to_time(&tmp, &now); | |
1415 | if (now > rtc_wkalarm_save_time) | |
1416 | rtc_wkalarm_save_time = 0; | |
1417 | } else { | |
1418 | rtc_wkalarm_save_time = 0; | |
1419 | } | |
1420 | } | |
1421 | cm_suspended = true; | |
1422 | } | |
1423 | ||
d829dc75 CC |
1424 | if (delayed_work_pending(&cm->fullbatt_vchk_work)) |
1425 | cancel_delayed_work(&cm->fullbatt_vchk_work); | |
3bb3dbbd DK |
1426 | cm->status_save_ext_pwr_inserted = is_ext_pwr_online(cm); |
1427 | cm->status_save_batt = is_batt_present(cm); | |
1428 | ||
1429 | if (!cm_rtc_set) { | |
1430 | cm_suspend_duration_ms = 0; | |
1431 | cm_rtc_set = cm_setup_timer(); | |
1432 | } | |
1433 | ||
1434 | return 0; | |
1435 | } | |
1436 | ||
1437 | static void cm_suspend_complete(struct device *dev) | |
1438 | { | |
bb2a95c2 | 1439 | struct charger_manager *cm = dev_get_drvdata(dev); |
3bb3dbbd DK |
1440 | |
1441 | if (cm_suspended) { | |
1442 | if (rtc_dev) { | |
1443 | struct rtc_wkalrm tmp; | |
1444 | ||
1445 | rtc_read_alarm(rtc_dev, &tmp); | |
1446 | rtc_wkalarm_save.pending = tmp.pending; | |
1447 | rtc_set_alarm(rtc_dev, &rtc_wkalarm_save); | |
1448 | } | |
1449 | cm_suspended = false; | |
1450 | cm_rtc_set = false; | |
1451 | } | |
1452 | ||
d829dc75 CC |
1453 | /* Re-enqueue delayed work (fullbatt_vchk_work) */ |
1454 | if (cm->fullbatt_vchk_jiffies_at) { | |
1455 | unsigned long delay = 0; | |
1456 | unsigned long now = jiffies + CM_JIFFIES_SMALL; | |
1457 | ||
1458 | if (time_after_eq(now, cm->fullbatt_vchk_jiffies_at)) { | |
1459 | delay = (unsigned long)((long)now | |
1460 | - (long)(cm->fullbatt_vchk_jiffies_at)); | |
1461 | delay = jiffies_to_msecs(delay); | |
1462 | } else { | |
1463 | delay = 0; | |
1464 | } | |
1465 | ||
1466 | /* | |
1467 | * Account for cm_suspend_duration_ms if | |
1468 | * assume_timer_stops_in_suspend is active | |
1469 | */ | |
1470 | if (g_desc && g_desc->assume_timer_stops_in_suspend) { | |
1471 | if (delay > cm_suspend_duration_ms) | |
1472 | delay -= cm_suspend_duration_ms; | |
1473 | else | |
1474 | delay = 0; | |
1475 | } | |
1476 | ||
1477 | queue_delayed_work(cm_wq, &cm->fullbatt_vchk_work, | |
1478 | msecs_to_jiffies(delay)); | |
1479 | } | |
dfeccb12 | 1480 | device_set_wakeup_capable(cm->dev, false); |
3bb3dbbd DK |
1481 | uevent_notify(cm, NULL); |
1482 | } | |
1483 | ||
1484 | static const struct dev_pm_ops charger_manager_pm = { | |
1485 | .prepare = cm_suspend_prepare, | |
dfeccb12 | 1486 | .suspend_noirq = cm_suspend_noirq, |
3bb3dbbd DK |
1487 | .complete = cm_suspend_complete, |
1488 | }; | |
1489 | ||
1490 | static struct platform_driver charger_manager_driver = { | |
1491 | .driver = { | |
1492 | .name = "charger-manager", | |
1493 | .owner = THIS_MODULE, | |
1494 | .pm = &charger_manager_pm, | |
1495 | }, | |
1496 | .probe = charger_manager_probe, | |
1497 | .remove = __devexit_p(charger_manager_remove), | |
1498 | .id_table = charger_manager_id, | |
1499 | }; | |
1500 | ||
1501 | static int __init charger_manager_init(void) | |
1502 | { | |
d829dc75 CC |
1503 | cm_wq = create_freezable_workqueue("charger_manager"); |
1504 | INIT_DELAYED_WORK(&cm_monitor_work, cm_monitor_poller); | |
1505 | ||
3bb3dbbd DK |
1506 | return platform_driver_register(&charger_manager_driver); |
1507 | } | |
1508 | late_initcall(charger_manager_init); | |
1509 | ||
1510 | static void __exit charger_manager_cleanup(void) | |
1511 | { | |
d829dc75 CC |
1512 | destroy_workqueue(cm_wq); |
1513 | cm_wq = NULL; | |
1514 | ||
3bb3dbbd DK |
1515 | platform_driver_unregister(&charger_manager_driver); |
1516 | } | |
1517 | module_exit(charger_manager_cleanup); | |
1518 | ||
dfeccb12 CC |
1519 | /** |
1520 | * find_power_supply - find the associated power_supply of charger | |
1521 | * @cm: the Charger Manager representing the battery | |
1522 | * @psy: pointer to instance of charger's power_supply | |
1523 | */ | |
1524 | static bool find_power_supply(struct charger_manager *cm, | |
1525 | struct power_supply *psy) | |
1526 | { | |
1527 | int i; | |
1528 | bool found = false; | |
1529 | ||
1530 | for (i = 0; cm->charger_stat[i]; i++) { | |
1531 | if (psy == cm->charger_stat[i]) { | |
1532 | found = true; | |
1533 | break; | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | return found; | |
1538 | } | |
1539 | ||
1540 | /** | |
1541 | * cm_notify_event - charger driver notify Charger Manager of charger event | |
1542 | * @psy: pointer to instance of charger's power_supply | |
1543 | * @type: type of charger event | |
1544 | * @msg: optional message passed to uevent_notify fuction | |
1545 | */ | |
1546 | void cm_notify_event(struct power_supply *psy, enum cm_event_types type, | |
1547 | char *msg) | |
1548 | { | |
1549 | struct charger_manager *cm; | |
1550 | bool found_power_supply = false; | |
1551 | ||
1552 | if (psy == NULL) | |
1553 | return; | |
1554 | ||
1555 | mutex_lock(&cm_list_mtx); | |
1556 | list_for_each_entry(cm, &cm_list, entry) { | |
1557 | found_power_supply = find_power_supply(cm, psy); | |
1558 | if (found_power_supply) | |
1559 | break; | |
1560 | } | |
1561 | mutex_unlock(&cm_list_mtx); | |
1562 | ||
1563 | if (!found_power_supply) | |
1564 | return; | |
1565 | ||
1566 | switch (type) { | |
1567 | case CM_EVENT_BATT_FULL: | |
1568 | fullbatt_handler(cm); | |
1569 | break; | |
1570 | case CM_EVENT_BATT_OUT: | |
1571 | battout_handler(cm); | |
1572 | break; | |
1573 | case CM_EVENT_BATT_IN: | |
1574 | case CM_EVENT_EXT_PWR_IN_OUT ... CM_EVENT_CHG_START_STOP: | |
1575 | misc_event_handler(cm, type); | |
1576 | break; | |
1577 | case CM_EVENT_UNKNOWN: | |
1578 | case CM_EVENT_OTHERS: | |
1579 | uevent_notify(cm, msg ? msg : default_event_names[type]); | |
1580 | break; | |
1581 | default: | |
1582 | dev_err(cm->dev, "%s type not specified.\n", __func__); | |
1583 | break; | |
1584 | } | |
1585 | } | |
1586 | EXPORT_SYMBOL_GPL(cm_notify_event); | |
1587 | ||
3bb3dbbd DK |
1588 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); |
1589 | MODULE_DESCRIPTION("Charger Manager"); | |
1590 | MODULE_LICENSE("GPL"); |