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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> | |
3950c786 | 25 | #include <linux/sysfs.h> |
3bb3dbbd | 26 | |
dfeccb12 CC |
27 | static const char * const default_event_names[] = { |
28 | [CM_EVENT_UNKNOWN] = "Unknown", | |
29 | [CM_EVENT_BATT_FULL] = "Battery Full", | |
30 | [CM_EVENT_BATT_IN] = "Battery Inserted", | |
31 | [CM_EVENT_BATT_OUT] = "Battery Pulled Out", | |
32 | [CM_EVENT_EXT_PWR_IN_OUT] = "External Power Attach/Detach", | |
33 | [CM_EVENT_CHG_START_STOP] = "Charging Start/Stop", | |
34 | [CM_EVENT_OTHERS] = "Other battery events" | |
35 | }; | |
36 | ||
3bb3dbbd DK |
37 | /* |
38 | * Regard CM_JIFFIES_SMALL jiffies is small enough to ignore for | |
39 | * delayed works so that we can run delayed works with CM_JIFFIES_SMALL | |
40 | * without any delays. | |
41 | */ | |
42 | #define CM_JIFFIES_SMALL (2) | |
43 | ||
44 | /* If y is valid (> 0) and smaller than x, do x = y */ | |
45 | #define CM_MIN_VALID(x, y) x = (((y > 0) && ((x) > (y))) ? (y) : (x)) | |
46 | ||
47 | /* | |
48 | * Regard CM_RTC_SMALL (sec) is small enough to ignore error in invoking | |
49 | * rtc alarm. It should be 2 or larger | |
50 | */ | |
51 | #define CM_RTC_SMALL (2) | |
52 | ||
53 | #define UEVENT_BUF_SIZE 32 | |
54 | ||
55 | static LIST_HEAD(cm_list); | |
56 | static DEFINE_MUTEX(cm_list_mtx); | |
57 | ||
58 | /* About in-suspend (suspend-again) monitoring */ | |
59 | static struct rtc_device *rtc_dev; | |
60 | /* | |
61 | * Backup RTC alarm | |
62 | * Save the wakeup alarm before entering suspend-to-RAM | |
63 | */ | |
64 | static struct rtc_wkalrm rtc_wkalarm_save; | |
65 | /* Backup RTC alarm time in terms of seconds since 01-01-1970 00:00:00 */ | |
66 | static unsigned long rtc_wkalarm_save_time; | |
67 | static bool cm_suspended; | |
68 | static bool cm_rtc_set; | |
69 | static unsigned long cm_suspend_duration_ms; | |
70 | ||
d829dc75 CC |
71 | /* About normal (not suspended) monitoring */ |
72 | static unsigned long polling_jiffy = ULONG_MAX; /* ULONG_MAX: no polling */ | |
73 | static unsigned long next_polling; /* Next appointed polling time */ | |
74 | static struct workqueue_struct *cm_wq; /* init at driver add */ | |
75 | static struct delayed_work cm_monitor_work; /* init at driver add */ | |
76 | ||
3bb3dbbd DK |
77 | /* Global charger-manager description */ |
78 | static struct charger_global_desc *g_desc; /* init with setup_charger_manager */ | |
79 | ||
80 | /** | |
81 | * is_batt_present - See if the battery presents in place. | |
82 | * @cm: the Charger Manager representing the battery. | |
83 | */ | |
84 | static bool is_batt_present(struct charger_manager *cm) | |
85 | { | |
86 | union power_supply_propval val; | |
87 | bool present = false; | |
88 | int i, ret; | |
89 | ||
90 | switch (cm->desc->battery_present) { | |
d829dc75 CC |
91 | case CM_BATTERY_PRESENT: |
92 | present = true; | |
93 | break; | |
94 | case CM_NO_BATTERY: | |
95 | break; | |
3bb3dbbd DK |
96 | case CM_FUEL_GAUGE: |
97 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
98 | POWER_SUPPLY_PROP_PRESENT, &val); | |
99 | if (ret == 0 && val.intval) | |
100 | present = true; | |
101 | break; | |
102 | case CM_CHARGER_STAT: | |
103 | for (i = 0; cm->charger_stat[i]; i++) { | |
104 | ret = cm->charger_stat[i]->get_property( | |
105 | cm->charger_stat[i], | |
106 | POWER_SUPPLY_PROP_PRESENT, &val); | |
107 | if (ret == 0 && val.intval) { | |
108 | present = true; | |
109 | break; | |
110 | } | |
111 | } | |
112 | break; | |
113 | } | |
114 | ||
115 | return present; | |
116 | } | |
117 | ||
118 | /** | |
119 | * is_ext_pwr_online - See if an external power source is attached to charge | |
120 | * @cm: the Charger Manager representing the battery. | |
121 | * | |
122 | * Returns true if at least one of the chargers of the battery has an external | |
123 | * power source attached to charge the battery regardless of whether it is | |
124 | * actually charging or not. | |
125 | */ | |
126 | static bool is_ext_pwr_online(struct charger_manager *cm) | |
127 | { | |
128 | union power_supply_propval val; | |
129 | bool online = false; | |
130 | int i, ret; | |
131 | ||
132 | /* If at least one of them has one, it's yes. */ | |
133 | for (i = 0; cm->charger_stat[i]; i++) { | |
134 | ret = cm->charger_stat[i]->get_property( | |
135 | cm->charger_stat[i], | |
136 | POWER_SUPPLY_PROP_ONLINE, &val); | |
137 | if (ret == 0 && val.intval) { | |
138 | online = true; | |
139 | break; | |
140 | } | |
141 | } | |
142 | ||
143 | return online; | |
144 | } | |
145 | ||
ad3d13ee DK |
146 | /** |
147 | * get_batt_uV - Get the voltage level of the battery | |
148 | * @cm: the Charger Manager representing the battery. | |
149 | * @uV: the voltage level returned. | |
150 | * | |
151 | * Returns 0 if there is no error. | |
152 | * Returns a negative value on error. | |
153 | */ | |
154 | static int get_batt_uV(struct charger_manager *cm, int *uV) | |
155 | { | |
156 | union power_supply_propval val; | |
157 | int ret; | |
158 | ||
bb2a95c2 | 159 | if (!cm->fuel_gauge) |
ad3d13ee DK |
160 | return -ENODEV; |
161 | ||
bb2a95c2 AL |
162 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, |
163 | POWER_SUPPLY_PROP_VOLTAGE_NOW, &val); | |
ad3d13ee DK |
164 | if (ret) |
165 | return ret; | |
166 | ||
167 | *uV = val.intval; | |
168 | return 0; | |
169 | } | |
170 | ||
3bb3dbbd DK |
171 | /** |
172 | * is_charging - Returns true if the battery is being charged. | |
173 | * @cm: the Charger Manager representing the battery. | |
174 | */ | |
175 | static bool is_charging(struct charger_manager *cm) | |
176 | { | |
177 | int i, ret; | |
178 | bool charging = false; | |
179 | union power_supply_propval val; | |
180 | ||
181 | /* If there is no battery, it cannot be charged */ | |
182 | if (!is_batt_present(cm)) | |
183 | return false; | |
184 | ||
185 | /* If at least one of the charger is charging, return yes */ | |
186 | for (i = 0; cm->charger_stat[i]; i++) { | |
187 | /* 1. The charger sholuld not be DISABLED */ | |
188 | if (cm->emergency_stop) | |
189 | continue; | |
190 | if (!cm->charger_enabled) | |
191 | continue; | |
192 | ||
193 | /* 2. The charger should be online (ext-power) */ | |
194 | ret = cm->charger_stat[i]->get_property( | |
195 | cm->charger_stat[i], | |
196 | POWER_SUPPLY_PROP_ONLINE, &val); | |
197 | if (ret) { | |
198 | dev_warn(cm->dev, "Cannot read ONLINE value from %s.\n", | |
199 | cm->desc->psy_charger_stat[i]); | |
200 | continue; | |
201 | } | |
202 | if (val.intval == 0) | |
203 | continue; | |
204 | ||
205 | /* | |
206 | * 3. The charger should not be FULL, DISCHARGING, | |
207 | * or NOT_CHARGING. | |
208 | */ | |
209 | ret = cm->charger_stat[i]->get_property( | |
210 | cm->charger_stat[i], | |
211 | POWER_SUPPLY_PROP_STATUS, &val); | |
212 | if (ret) { | |
213 | dev_warn(cm->dev, "Cannot read STATUS value from %s.\n", | |
214 | cm->desc->psy_charger_stat[i]); | |
215 | continue; | |
216 | } | |
217 | if (val.intval == POWER_SUPPLY_STATUS_FULL || | |
218 | val.intval == POWER_SUPPLY_STATUS_DISCHARGING || | |
219 | val.intval == POWER_SUPPLY_STATUS_NOT_CHARGING) | |
220 | continue; | |
221 | ||
222 | /* Then, this is charging. */ | |
223 | charging = true; | |
224 | break; | |
225 | } | |
226 | ||
227 | return charging; | |
228 | } | |
229 | ||
2ed9e9b6 CC |
230 | /** |
231 | * is_full_charged - Returns true if the battery is fully charged. | |
232 | * @cm: the Charger Manager representing the battery. | |
233 | */ | |
234 | static bool is_full_charged(struct charger_manager *cm) | |
235 | { | |
236 | struct charger_desc *desc = cm->desc; | |
237 | union power_supply_propval val; | |
238 | int ret = 0; | |
239 | int uV; | |
240 | ||
241 | /* If there is no battery, it cannot be charged */ | |
0fa11dbc CC |
242 | if (!is_batt_present(cm)) |
243 | return false; | |
2ed9e9b6 CC |
244 | |
245 | if (cm->fuel_gauge && desc->fullbatt_full_capacity > 0) { | |
0fa11dbc CC |
246 | val.intval = 0; |
247 | ||
2ed9e9b6 CC |
248 | /* Not full if capacity of fuel gauge isn't full */ |
249 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
250 | POWER_SUPPLY_PROP_CHARGE_FULL, &val); | |
0fa11dbc CC |
251 | if (!ret && val.intval > desc->fullbatt_full_capacity) |
252 | return true; | |
2ed9e9b6 CC |
253 | } |
254 | ||
255 | /* Full, if it's over the fullbatt voltage */ | |
256 | if (desc->fullbatt_uV > 0) { | |
257 | ret = get_batt_uV(cm, &uV); | |
0fa11dbc CC |
258 | if (!ret && uV >= desc->fullbatt_uV) |
259 | return true; | |
2ed9e9b6 CC |
260 | } |
261 | ||
262 | /* Full, if the capacity is more than fullbatt_soc */ | |
263 | if (cm->fuel_gauge && desc->fullbatt_soc > 0) { | |
0fa11dbc CC |
264 | val.intval = 0; |
265 | ||
2ed9e9b6 CC |
266 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, |
267 | POWER_SUPPLY_PROP_CAPACITY, &val); | |
0fa11dbc CC |
268 | if (!ret && val.intval >= desc->fullbatt_soc) |
269 | return true; | |
2ed9e9b6 CC |
270 | } |
271 | ||
0fa11dbc | 272 | return false; |
2ed9e9b6 CC |
273 | } |
274 | ||
3bb3dbbd DK |
275 | /** |
276 | * is_polling_required - Return true if need to continue polling for this CM. | |
277 | * @cm: the Charger Manager representing the battery. | |
278 | */ | |
279 | static bool is_polling_required(struct charger_manager *cm) | |
280 | { | |
281 | switch (cm->desc->polling_mode) { | |
282 | case CM_POLL_DISABLE: | |
283 | return false; | |
284 | case CM_POLL_ALWAYS: | |
285 | return true; | |
286 | case CM_POLL_EXTERNAL_POWER_ONLY: | |
287 | return is_ext_pwr_online(cm); | |
288 | case CM_POLL_CHARGING_ONLY: | |
289 | return is_charging(cm); | |
290 | default: | |
291 | dev_warn(cm->dev, "Incorrect polling_mode (%d)\n", | |
292 | cm->desc->polling_mode); | |
293 | } | |
294 | ||
295 | return false; | |
296 | } | |
297 | ||
298 | /** | |
299 | * try_charger_enable - Enable/Disable chargers altogether | |
300 | * @cm: the Charger Manager representing the battery. | |
301 | * @enable: true: enable / false: disable | |
302 | * | |
303 | * Note that Charger Manager keeps the charger enabled regardless whether | |
304 | * the charger is charging or not (because battery is full or no external | |
305 | * power source exists) except when CM needs to disable chargers forcibly | |
306 | * bacause of emergency causes; when the battery is overheated or too cold. | |
307 | */ | |
308 | static int try_charger_enable(struct charger_manager *cm, bool enable) | |
309 | { | |
310 | int err = 0, i; | |
311 | struct charger_desc *desc = cm->desc; | |
312 | ||
313 | /* Ignore if it's redundent command */ | |
bb2a95c2 | 314 | if (enable == cm->charger_enabled) |
3bb3dbbd DK |
315 | return 0; |
316 | ||
317 | if (enable) { | |
318 | if (cm->emergency_stop) | |
319 | return -EAGAIN; | |
8fcfe088 CC |
320 | |
321 | /* | |
322 | * Save start time of charging to limit | |
323 | * maximum possible charging time. | |
324 | */ | |
325 | cm->charging_start_time = ktime_to_ms(ktime_get()); | |
326 | cm->charging_end_time = 0; | |
327 | ||
dbb61fc7 | 328 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
3950c786 CC |
329 | if (desc->charger_regulators[i].externally_control) |
330 | continue; | |
331 | ||
dbb61fc7 CC |
332 | err = regulator_enable(desc->charger_regulators[i].consumer); |
333 | if (err < 0) { | |
334 | dev_warn(cm->dev, | |
335 | "Cannot enable %s regulator\n", | |
336 | desc->charger_regulators[i].regulator_name); | |
337 | } | |
338 | } | |
3bb3dbbd | 339 | } else { |
8fcfe088 CC |
340 | /* |
341 | * Save end time of charging to maintain fully charged state | |
342 | * of battery after full-batt. | |
343 | */ | |
344 | cm->charging_start_time = 0; | |
345 | cm->charging_end_time = ktime_to_ms(ktime_get()); | |
346 | ||
dbb61fc7 | 347 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
3950c786 CC |
348 | if (desc->charger_regulators[i].externally_control) |
349 | continue; | |
350 | ||
dbb61fc7 CC |
351 | err = regulator_disable(desc->charger_regulators[i].consumer); |
352 | if (err < 0) { | |
353 | dev_warn(cm->dev, | |
354 | "Cannot disable %s regulator\n", | |
355 | desc->charger_regulators[i].regulator_name); | |
356 | } | |
357 | } | |
358 | ||
3bb3dbbd DK |
359 | /* |
360 | * Abnormal battery state - Stop charging forcibly, | |
361 | * even if charger was enabled at the other places | |
362 | */ | |
3bb3dbbd DK |
363 | for (i = 0; i < desc->num_charger_regulators; i++) { |
364 | if (regulator_is_enabled( | |
365 | desc->charger_regulators[i].consumer)) { | |
366 | regulator_force_disable( | |
367 | desc->charger_regulators[i].consumer); | |
368 | dev_warn(cm->dev, | |
369 | "Disable regulator(%s) forcibly.\n", | |
bee737bc | 370 | desc->charger_regulators[i].regulator_name); |
3bb3dbbd DK |
371 | } |
372 | } | |
373 | } | |
374 | ||
375 | if (!err) | |
376 | cm->charger_enabled = enable; | |
377 | ||
378 | return err; | |
379 | } | |
380 | ||
d829dc75 CC |
381 | /** |
382 | * try_charger_restart - Restart charging. | |
383 | * @cm: the Charger Manager representing the battery. | |
384 | * | |
385 | * Restart charging by turning off and on the charger. | |
386 | */ | |
387 | static int try_charger_restart(struct charger_manager *cm) | |
388 | { | |
389 | int err; | |
390 | ||
391 | if (cm->emergency_stop) | |
392 | return -EAGAIN; | |
393 | ||
394 | err = try_charger_enable(cm, false); | |
395 | if (err) | |
396 | return err; | |
397 | ||
398 | return try_charger_enable(cm, true); | |
399 | } | |
400 | ||
3bb3dbbd DK |
401 | /** |
402 | * uevent_notify - Let users know something has changed. | |
403 | * @cm: the Charger Manager representing the battery. | |
404 | * @event: the event string. | |
405 | * | |
406 | * If @event is null, it implies that uevent_notify is called | |
407 | * by resume function. When called in the resume function, cm_suspended | |
408 | * should be already reset to false in order to let uevent_notify | |
409 | * notify the recent event during the suspend to users. While | |
410 | * suspended, uevent_notify does not notify users, but tracks | |
411 | * events so that uevent_notify can notify users later after resumed. | |
412 | */ | |
413 | static void uevent_notify(struct charger_manager *cm, const char *event) | |
414 | { | |
415 | static char env_str[UEVENT_BUF_SIZE + 1] = ""; | |
416 | static char env_str_save[UEVENT_BUF_SIZE + 1] = ""; | |
417 | ||
418 | if (cm_suspended) { | |
419 | /* Nothing in suspended-event buffer */ | |
420 | if (env_str_save[0] == 0) { | |
421 | if (!strncmp(env_str, event, UEVENT_BUF_SIZE)) | |
422 | return; /* status not changed */ | |
423 | strncpy(env_str_save, event, UEVENT_BUF_SIZE); | |
424 | return; | |
425 | } | |
426 | ||
427 | if (!strncmp(env_str_save, event, UEVENT_BUF_SIZE)) | |
428 | return; /* Duplicated. */ | |
bb2a95c2 | 429 | strncpy(env_str_save, event, UEVENT_BUF_SIZE); |
3bb3dbbd DK |
430 | return; |
431 | } | |
432 | ||
433 | if (event == NULL) { | |
434 | /* No messages pending */ | |
435 | if (!env_str_save[0]) | |
436 | return; | |
437 | ||
438 | strncpy(env_str, env_str_save, UEVENT_BUF_SIZE); | |
439 | kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE); | |
440 | env_str_save[0] = 0; | |
441 | ||
442 | return; | |
443 | } | |
444 | ||
445 | /* status not changed */ | |
446 | if (!strncmp(env_str, event, UEVENT_BUF_SIZE)) | |
447 | return; | |
448 | ||
449 | /* save the status and notify the update */ | |
450 | strncpy(env_str, event, UEVENT_BUF_SIZE); | |
451 | kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE); | |
452 | ||
453 | dev_info(cm->dev, event); | |
454 | } | |
455 | ||
d829dc75 CC |
456 | /** |
457 | * fullbatt_vchk - Check voltage drop some times after "FULL" event. | |
458 | * @work: the work_struct appointing the function | |
459 | * | |
460 | * If a user has designated "fullbatt_vchkdrop_ms/uV" values with | |
461 | * charger_desc, Charger Manager checks voltage drop after the battery | |
462 | * "FULL" event. It checks whether the voltage has dropped more than | |
463 | * fullbatt_vchkdrop_uV by calling this function after fullbatt_vchkrop_ms. | |
464 | */ | |
465 | static void fullbatt_vchk(struct work_struct *work) | |
466 | { | |
467 | struct delayed_work *dwork = to_delayed_work(work); | |
468 | struct charger_manager *cm = container_of(dwork, | |
469 | struct charger_manager, fullbatt_vchk_work); | |
470 | struct charger_desc *desc = cm->desc; | |
471 | int batt_uV, err, diff; | |
472 | ||
473 | /* remove the appointment for fullbatt_vchk */ | |
474 | cm->fullbatt_vchk_jiffies_at = 0; | |
475 | ||
476 | if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms) | |
477 | return; | |
478 | ||
479 | err = get_batt_uV(cm, &batt_uV); | |
480 | if (err) { | |
481 | dev_err(cm->dev, "%s: get_batt_uV error(%d).\n", __func__, err); | |
482 | return; | |
483 | } | |
484 | ||
f36b9ddb CC |
485 | diff = desc->fullbatt_uV - batt_uV; |
486 | if (diff < 0) | |
487 | return; | |
d829dc75 | 488 | |
2ed9e9b6 | 489 | dev_info(cm->dev, "VBATT dropped %duV after full-batt.\n", diff); |
d829dc75 CC |
490 | |
491 | if (diff > desc->fullbatt_vchkdrop_uV) { | |
492 | try_charger_restart(cm); | |
8fcfe088 CC |
493 | uevent_notify(cm, "Recharging"); |
494 | } | |
495 | } | |
496 | ||
497 | /** | |
498 | * check_charging_duration - Monitor charging/discharging duration | |
499 | * @cm: the Charger Manager representing the battery. | |
500 | * | |
501 | * If whole charging duration exceed 'charging_max_duration_ms', | |
502 | * cm stop charging to prevent overcharge/overheat. If discharging | |
503 | * duration exceed 'discharging _max_duration_ms', charger cable is | |
504 | * attached, after full-batt, cm start charging to maintain fully | |
505 | * charged state for battery. | |
506 | */ | |
507 | static int check_charging_duration(struct charger_manager *cm) | |
508 | { | |
509 | struct charger_desc *desc = cm->desc; | |
510 | u64 curr = ktime_to_ms(ktime_get()); | |
511 | u64 duration; | |
512 | int ret = false; | |
513 | ||
514 | if (!desc->charging_max_duration_ms && | |
515 | !desc->discharging_max_duration_ms) | |
516 | return ret; | |
517 | ||
518 | if (cm->charger_enabled) { | |
519 | duration = curr - cm->charging_start_time; | |
520 | ||
521 | if (duration > desc->charging_max_duration_ms) { | |
522 | dev_info(cm->dev, "Charging duration exceed %lldms", | |
523 | desc->charging_max_duration_ms); | |
524 | uevent_notify(cm, "Discharging"); | |
525 | try_charger_enable(cm, false); | |
526 | ret = true; | |
527 | } | |
528 | } else if (is_ext_pwr_online(cm) && !cm->charger_enabled) { | |
529 | duration = curr - cm->charging_end_time; | |
530 | ||
531 | if (duration > desc->charging_max_duration_ms && | |
532 | is_ext_pwr_online(cm)) { | |
533 | dev_info(cm->dev, "DisCharging duration exceed %lldms", | |
534 | desc->discharging_max_duration_ms); | |
535 | uevent_notify(cm, "Recharing"); | |
536 | try_charger_enable(cm, true); | |
537 | ret = true; | |
538 | } | |
d829dc75 | 539 | } |
8fcfe088 CC |
540 | |
541 | return ret; | |
d829dc75 CC |
542 | } |
543 | ||
3bb3dbbd DK |
544 | /** |
545 | * _cm_monitor - Monitor the temperature and return true for exceptions. | |
546 | * @cm: the Charger Manager representing the battery. | |
547 | * | |
548 | * Returns true if there is an event to notify for the battery. | |
549 | * (True if the status of "emergency_stop" changes) | |
550 | */ | |
551 | static bool _cm_monitor(struct charger_manager *cm) | |
552 | { | |
553 | struct charger_desc *desc = cm->desc; | |
554 | int temp = desc->temperature_out_of_range(&cm->last_temp_mC); | |
555 | ||
556 | dev_dbg(cm->dev, "monitoring (%2.2d.%3.3dC)\n", | |
557 | cm->last_temp_mC / 1000, cm->last_temp_mC % 1000); | |
558 | ||
2ed9e9b6 CC |
559 | /* It has been stopped already */ |
560 | if (temp && cm->emergency_stop) | |
3bb3dbbd DK |
561 | return false; |
562 | ||
2ed9e9b6 CC |
563 | /* |
564 | * Check temperature whether overheat or cold. | |
565 | * If temperature is out of range normal state, stop charging. | |
566 | */ | |
3bb3dbbd DK |
567 | if (temp) { |
568 | cm->emergency_stop = temp; | |
569 | if (!try_charger_enable(cm, false)) { | |
570 | if (temp > 0) | |
571 | uevent_notify(cm, "OVERHEAT"); | |
572 | else | |
573 | uevent_notify(cm, "COLD"); | |
574 | } | |
2ed9e9b6 | 575 | |
8fcfe088 CC |
576 | /* |
577 | * Check whole charging duration and discharing duration | |
578 | * after full-batt. | |
579 | */ | |
580 | } else if (!cm->emergency_stop && check_charging_duration(cm)) { | |
581 | dev_dbg(cm->dev, | |
582 | "Charging/Discharging duration is out of range"); | |
2ed9e9b6 CC |
583 | /* |
584 | * Check dropped voltage of battery. If battery voltage is more | |
585 | * dropped than fullbatt_vchkdrop_uV after fully charged state, | |
586 | * charger-manager have to recharge battery. | |
587 | */ | |
588 | } else if (!cm->emergency_stop && is_ext_pwr_online(cm) && | |
589 | !cm->charger_enabled) { | |
590 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
591 | ||
592 | /* | |
593 | * Check whether fully charged state to protect overcharge | |
594 | * if charger-manager is charging for battery. | |
595 | */ | |
596 | } else if (!cm->emergency_stop && is_full_charged(cm) && | |
597 | cm->charger_enabled) { | |
598 | dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged.\n"); | |
599 | uevent_notify(cm, default_event_names[CM_EVENT_BATT_FULL]); | |
600 | ||
601 | try_charger_enable(cm, false); | |
602 | ||
603 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
3bb3dbbd DK |
604 | } else { |
605 | cm->emergency_stop = 0; | |
2ed9e9b6 CC |
606 | if (is_ext_pwr_online(cm)) { |
607 | if (!try_charger_enable(cm, true)) | |
608 | uevent_notify(cm, "CHARGING"); | |
609 | } | |
3bb3dbbd DK |
610 | } |
611 | ||
612 | return true; | |
613 | } | |
614 | ||
615 | /** | |
616 | * cm_monitor - Monitor every battery. | |
617 | * | |
618 | * Returns true if there is an event to notify from any of the batteries. | |
619 | * (True if the status of "emergency_stop" changes) | |
620 | */ | |
621 | static bool cm_monitor(void) | |
622 | { | |
623 | bool stop = false; | |
624 | struct charger_manager *cm; | |
625 | ||
626 | mutex_lock(&cm_list_mtx); | |
627 | ||
bb2a95c2 AL |
628 | list_for_each_entry(cm, &cm_list, entry) { |
629 | if (_cm_monitor(cm)) | |
630 | stop = true; | |
631 | } | |
3bb3dbbd DK |
632 | |
633 | mutex_unlock(&cm_list_mtx); | |
634 | ||
635 | return stop; | |
636 | } | |
637 | ||
d829dc75 CC |
638 | /** |
639 | * _setup_polling - Setup the next instance of polling. | |
640 | * @work: work_struct of the function _setup_polling. | |
641 | */ | |
642 | static void _setup_polling(struct work_struct *work) | |
643 | { | |
644 | unsigned long min = ULONG_MAX; | |
645 | struct charger_manager *cm; | |
646 | bool keep_polling = false; | |
647 | unsigned long _next_polling; | |
648 | ||
649 | mutex_lock(&cm_list_mtx); | |
650 | ||
651 | list_for_each_entry(cm, &cm_list, entry) { | |
652 | if (is_polling_required(cm) && cm->desc->polling_interval_ms) { | |
653 | keep_polling = true; | |
654 | ||
655 | if (min > cm->desc->polling_interval_ms) | |
656 | min = cm->desc->polling_interval_ms; | |
657 | } | |
658 | } | |
659 | ||
660 | polling_jiffy = msecs_to_jiffies(min); | |
661 | if (polling_jiffy <= CM_JIFFIES_SMALL) | |
662 | polling_jiffy = CM_JIFFIES_SMALL + 1; | |
663 | ||
664 | if (!keep_polling) | |
665 | polling_jiffy = ULONG_MAX; | |
666 | if (polling_jiffy == ULONG_MAX) | |
667 | goto out; | |
668 | ||
669 | WARN(cm_wq == NULL, "charger-manager: workqueue not initialized" | |
670 | ". try it later. %s\n", __func__); | |
671 | ||
672 | _next_polling = jiffies + polling_jiffy; | |
673 | ||
674 | if (!delayed_work_pending(&cm_monitor_work) || | |
675 | (delayed_work_pending(&cm_monitor_work) && | |
676 | time_after(next_polling, _next_polling))) { | |
d829dc75 | 677 | next_polling = jiffies + polling_jiffy; |
41f63c53 | 678 | mod_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy); |
d829dc75 CC |
679 | } |
680 | ||
681 | out: | |
682 | mutex_unlock(&cm_list_mtx); | |
683 | } | |
684 | static DECLARE_WORK(setup_polling, _setup_polling); | |
685 | ||
686 | /** | |
687 | * cm_monitor_poller - The Monitor / Poller. | |
688 | * @work: work_struct of the function cm_monitor_poller | |
689 | * | |
690 | * During non-suspended state, cm_monitor_poller is used to poll and monitor | |
691 | * the batteries. | |
692 | */ | |
693 | static void cm_monitor_poller(struct work_struct *work) | |
694 | { | |
695 | cm_monitor(); | |
696 | schedule_work(&setup_polling); | |
697 | } | |
698 | ||
dfeccb12 CC |
699 | /** |
700 | * fullbatt_handler - Event handler for CM_EVENT_BATT_FULL | |
701 | * @cm: the Charger Manager representing the battery. | |
702 | */ | |
703 | static void fullbatt_handler(struct charger_manager *cm) | |
704 | { | |
705 | struct charger_desc *desc = cm->desc; | |
706 | ||
707 | if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms) | |
708 | goto out; | |
709 | ||
710 | if (cm_suspended) | |
711 | device_set_wakeup_capable(cm->dev, true); | |
712 | ||
41f63c53 TH |
713 | mod_delayed_work(cm_wq, &cm->fullbatt_vchk_work, |
714 | msecs_to_jiffies(desc->fullbatt_vchkdrop_ms)); | |
dfeccb12 CC |
715 | cm->fullbatt_vchk_jiffies_at = jiffies + msecs_to_jiffies( |
716 | desc->fullbatt_vchkdrop_ms); | |
717 | ||
718 | if (cm->fullbatt_vchk_jiffies_at == 0) | |
719 | cm->fullbatt_vchk_jiffies_at = 1; | |
720 | ||
721 | out: | |
722 | dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged.\n"); | |
723 | uevent_notify(cm, default_event_names[CM_EVENT_BATT_FULL]); | |
724 | } | |
725 | ||
726 | /** | |
727 | * battout_handler - Event handler for CM_EVENT_BATT_OUT | |
728 | * @cm: the Charger Manager representing the battery. | |
729 | */ | |
730 | static void battout_handler(struct charger_manager *cm) | |
731 | { | |
732 | if (cm_suspended) | |
733 | device_set_wakeup_capable(cm->dev, true); | |
734 | ||
735 | if (!is_batt_present(cm)) { | |
736 | dev_emerg(cm->dev, "Battery Pulled Out!\n"); | |
737 | uevent_notify(cm, default_event_names[CM_EVENT_BATT_OUT]); | |
738 | } else { | |
739 | uevent_notify(cm, "Battery Reinserted?"); | |
740 | } | |
741 | } | |
742 | ||
743 | /** | |
744 | * misc_event_handler - Handler for other evnets | |
745 | * @cm: the Charger Manager representing the battery. | |
746 | * @type: the Charger Manager representing the battery. | |
747 | */ | |
748 | static void misc_event_handler(struct charger_manager *cm, | |
749 | enum cm_event_types type) | |
750 | { | |
751 | if (cm_suspended) | |
752 | device_set_wakeup_capable(cm->dev, true); | |
753 | ||
754 | if (!delayed_work_pending(&cm_monitor_work) && | |
755 | is_polling_required(cm) && cm->desc->polling_interval_ms) | |
756 | schedule_work(&setup_polling); | |
757 | uevent_notify(cm, default_event_names[type]); | |
758 | } | |
759 | ||
ad3d13ee DK |
760 | static int charger_get_property(struct power_supply *psy, |
761 | enum power_supply_property psp, | |
762 | union power_supply_propval *val) | |
763 | { | |
764 | struct charger_manager *cm = container_of(psy, | |
765 | struct charger_manager, charger_psy); | |
766 | struct charger_desc *desc = cm->desc; | |
df58c04c AV |
767 | int ret = 0; |
768 | int uV; | |
ad3d13ee DK |
769 | |
770 | switch (psp) { | |
771 | case POWER_SUPPLY_PROP_STATUS: | |
772 | if (is_charging(cm)) | |
773 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
774 | else if (is_ext_pwr_online(cm)) | |
775 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
776 | else | |
777 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
778 | break; | |
779 | case POWER_SUPPLY_PROP_HEALTH: | |
780 | if (cm->emergency_stop > 0) | |
781 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
782 | else if (cm->emergency_stop < 0) | |
783 | val->intval = POWER_SUPPLY_HEALTH_COLD; | |
784 | else | |
785 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
786 | break; | |
787 | case POWER_SUPPLY_PROP_PRESENT: | |
788 | if (is_batt_present(cm)) | |
789 | val->intval = 1; | |
790 | else | |
791 | val->intval = 0; | |
792 | break; | |
793 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
df58c04c | 794 | ret = get_batt_uV(cm, &val->intval); |
ad3d13ee DK |
795 | break; |
796 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
797 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
798 | POWER_SUPPLY_PROP_CURRENT_NOW, val); | |
799 | break; | |
800 | case POWER_SUPPLY_PROP_TEMP: | |
801 | /* in thenth of centigrade */ | |
802 | if (cm->last_temp_mC == INT_MIN) | |
803 | desc->temperature_out_of_range(&cm->last_temp_mC); | |
804 | val->intval = cm->last_temp_mC / 100; | |
805 | if (!desc->measure_battery_temp) | |
806 | ret = -ENODEV; | |
807 | break; | |
808 | case POWER_SUPPLY_PROP_TEMP_AMBIENT: | |
809 | /* in thenth of centigrade */ | |
810 | if (cm->last_temp_mC == INT_MIN) | |
811 | desc->temperature_out_of_range(&cm->last_temp_mC); | |
812 | val->intval = cm->last_temp_mC / 100; | |
813 | if (desc->measure_battery_temp) | |
814 | ret = -ENODEV; | |
815 | break; | |
816 | case POWER_SUPPLY_PROP_CAPACITY: | |
817 | if (!cm->fuel_gauge) { | |
818 | ret = -ENODEV; | |
819 | break; | |
820 | } | |
821 | ||
822 | if (!is_batt_present(cm)) { | |
823 | /* There is no battery. Assume 100% */ | |
824 | val->intval = 100; | |
825 | break; | |
826 | } | |
827 | ||
828 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
829 | POWER_SUPPLY_PROP_CAPACITY, val); | |
830 | if (ret) | |
831 | break; | |
832 | ||
833 | if (val->intval > 100) { | |
834 | val->intval = 100; | |
835 | break; | |
836 | } | |
837 | if (val->intval < 0) | |
838 | val->intval = 0; | |
839 | ||
840 | /* Do not adjust SOC when charging: voltage is overrated */ | |
841 | if (is_charging(cm)) | |
842 | break; | |
843 | ||
844 | /* | |
845 | * If the capacity value is inconsistent, calibrate it base on | |
846 | * the battery voltage values and the thresholds given as desc | |
847 | */ | |
848 | ret = get_batt_uV(cm, &uV); | |
849 | if (ret) { | |
850 | /* Voltage information not available. No calibration */ | |
851 | ret = 0; | |
852 | break; | |
853 | } | |
854 | ||
855 | if (desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV && | |
856 | !is_charging(cm)) { | |
857 | val->intval = 100; | |
858 | break; | |
859 | } | |
860 | ||
861 | break; | |
862 | case POWER_SUPPLY_PROP_ONLINE: | |
863 | if (is_ext_pwr_online(cm)) | |
864 | val->intval = 1; | |
865 | else | |
866 | val->intval = 0; | |
867 | break; | |
868 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
2ed9e9b6 | 869 | if (is_full_charged(cm)) |
ad3d13ee | 870 | val->intval = 1; |
2ed9e9b6 CC |
871 | else |
872 | val->intval = 0; | |
ad3d13ee DK |
873 | ret = 0; |
874 | break; | |
875 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
876 | if (is_charging(cm)) { | |
877 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
878 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
879 | val); | |
880 | if (ret) { | |
881 | val->intval = 1; | |
882 | ret = 0; | |
883 | } else { | |
884 | /* If CHARGE_NOW is supplied, use it */ | |
885 | val->intval = (val->intval > 0) ? | |
886 | val->intval : 1; | |
887 | } | |
888 | } else { | |
889 | val->intval = 0; | |
890 | } | |
891 | break; | |
892 | default: | |
893 | return -EINVAL; | |
894 | } | |
895 | return ret; | |
896 | } | |
897 | ||
898 | #define NUM_CHARGER_PSY_OPTIONAL (4) | |
899 | static enum power_supply_property default_charger_props[] = { | |
900 | /* Guaranteed to provide */ | |
901 | POWER_SUPPLY_PROP_STATUS, | |
902 | POWER_SUPPLY_PROP_HEALTH, | |
903 | POWER_SUPPLY_PROP_PRESENT, | |
904 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
905 | POWER_SUPPLY_PROP_CAPACITY, | |
906 | POWER_SUPPLY_PROP_ONLINE, | |
907 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
908 | /* | |
909 | * Optional properties are: | |
910 | * POWER_SUPPLY_PROP_CHARGE_NOW, | |
911 | * POWER_SUPPLY_PROP_CURRENT_NOW, | |
912 | * POWER_SUPPLY_PROP_TEMP, and | |
913 | * POWER_SUPPLY_PROP_TEMP_AMBIENT, | |
914 | */ | |
915 | }; | |
916 | ||
917 | static struct power_supply psy_default = { | |
918 | .name = "battery", | |
919 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
920 | .properties = default_charger_props, | |
921 | .num_properties = ARRAY_SIZE(default_charger_props), | |
922 | .get_property = charger_get_property, | |
923 | }; | |
924 | ||
3bb3dbbd DK |
925 | /** |
926 | * cm_setup_timer - For in-suspend monitoring setup wakeup alarm | |
927 | * for suspend_again. | |
928 | * | |
929 | * Returns true if the alarm is set for Charger Manager to use. | |
930 | * Returns false if | |
931 | * cm_setup_timer fails to set an alarm, | |
932 | * cm_setup_timer does not need to set an alarm for Charger Manager, | |
933 | * or an alarm previously configured is to be used. | |
934 | */ | |
935 | static bool cm_setup_timer(void) | |
936 | { | |
937 | struct charger_manager *cm; | |
938 | unsigned int wakeup_ms = UINT_MAX; | |
939 | bool ret = false; | |
940 | ||
941 | mutex_lock(&cm_list_mtx); | |
942 | ||
943 | list_for_each_entry(cm, &cm_list, entry) { | |
d829dc75 CC |
944 | unsigned int fbchk_ms = 0; |
945 | ||
946 | /* fullbatt_vchk is required. setup timer for that */ | |
947 | if (cm->fullbatt_vchk_jiffies_at) { | |
948 | fbchk_ms = jiffies_to_msecs(cm->fullbatt_vchk_jiffies_at | |
949 | - jiffies); | |
950 | if (time_is_before_eq_jiffies( | |
951 | cm->fullbatt_vchk_jiffies_at) || | |
952 | msecs_to_jiffies(fbchk_ms) < CM_JIFFIES_SMALL) { | |
953 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
954 | fbchk_ms = 0; | |
955 | } | |
956 | } | |
957 | CM_MIN_VALID(wakeup_ms, fbchk_ms); | |
958 | ||
3bb3dbbd DK |
959 | /* Skip if polling is not required for this CM */ |
960 | if (!is_polling_required(cm) && !cm->emergency_stop) | |
961 | continue; | |
962 | if (cm->desc->polling_interval_ms == 0) | |
963 | continue; | |
964 | CM_MIN_VALID(wakeup_ms, cm->desc->polling_interval_ms); | |
965 | } | |
966 | ||
967 | mutex_unlock(&cm_list_mtx); | |
968 | ||
969 | if (wakeup_ms < UINT_MAX && wakeup_ms > 0) { | |
970 | pr_info("Charger Manager wakeup timer: %u ms.\n", wakeup_ms); | |
971 | if (rtc_dev) { | |
972 | struct rtc_wkalrm tmp; | |
973 | unsigned long time, now; | |
974 | unsigned long add = DIV_ROUND_UP(wakeup_ms, 1000); | |
975 | ||
976 | /* | |
977 | * Set alarm with the polling interval (wakeup_ms) | |
978 | * except when rtc_wkalarm_save comes first. | |
979 | * However, the alarm time should be NOW + | |
980 | * CM_RTC_SMALL or later. | |
981 | */ | |
982 | tmp.enabled = 1; | |
983 | rtc_read_time(rtc_dev, &tmp.time); | |
984 | rtc_tm_to_time(&tmp.time, &now); | |
985 | if (add < CM_RTC_SMALL) | |
986 | add = CM_RTC_SMALL; | |
987 | time = now + add; | |
988 | ||
989 | ret = true; | |
990 | ||
991 | if (rtc_wkalarm_save.enabled && | |
992 | rtc_wkalarm_save_time && | |
993 | rtc_wkalarm_save_time < time) { | |
994 | if (rtc_wkalarm_save_time < now + CM_RTC_SMALL) | |
995 | time = now + CM_RTC_SMALL; | |
996 | else | |
997 | time = rtc_wkalarm_save_time; | |
998 | ||
999 | /* The timer is not appointed by CM */ | |
1000 | ret = false; | |
1001 | } | |
1002 | ||
1003 | pr_info("Waking up after %lu secs.\n", | |
1004 | time - now); | |
1005 | ||
1006 | rtc_time_to_tm(time, &tmp.time); | |
1007 | rtc_set_alarm(rtc_dev, &tmp); | |
1008 | cm_suspend_duration_ms += wakeup_ms; | |
1009 | return ret; | |
1010 | } | |
1011 | } | |
1012 | ||
1013 | if (rtc_dev) | |
1014 | rtc_set_alarm(rtc_dev, &rtc_wkalarm_save); | |
1015 | return false; | |
1016 | } | |
1017 | ||
d829dc75 CC |
1018 | static void _cm_fbchk_in_suspend(struct charger_manager *cm) |
1019 | { | |
1020 | unsigned long jiffy_now = jiffies; | |
1021 | ||
1022 | if (!cm->fullbatt_vchk_jiffies_at) | |
1023 | return; | |
1024 | ||
1025 | if (g_desc && g_desc->assume_timer_stops_in_suspend) | |
1026 | jiffy_now += msecs_to_jiffies(cm_suspend_duration_ms); | |
1027 | ||
1028 | /* Execute now if it's going to be executed not too long after */ | |
1029 | jiffy_now += CM_JIFFIES_SMALL; | |
1030 | ||
1031 | if (time_after_eq(jiffy_now, cm->fullbatt_vchk_jiffies_at)) | |
1032 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
1033 | } | |
1034 | ||
3bb3dbbd DK |
1035 | /** |
1036 | * cm_suspend_again - Determine whether suspend again or not | |
1037 | * | |
1038 | * Returns true if the system should be suspended again | |
1039 | * Returns false if the system should be woken up | |
1040 | */ | |
1041 | bool cm_suspend_again(void) | |
1042 | { | |
1043 | struct charger_manager *cm; | |
1044 | bool ret = false; | |
1045 | ||
1046 | if (!g_desc || !g_desc->rtc_only_wakeup || !g_desc->rtc_only_wakeup() || | |
1047 | !cm_rtc_set) | |
1048 | return false; | |
1049 | ||
1050 | if (cm_monitor()) | |
1051 | goto out; | |
1052 | ||
1053 | ret = true; | |
1054 | mutex_lock(&cm_list_mtx); | |
1055 | list_for_each_entry(cm, &cm_list, entry) { | |
d829dc75 CC |
1056 | _cm_fbchk_in_suspend(cm); |
1057 | ||
3bb3dbbd | 1058 | if (cm->status_save_ext_pwr_inserted != is_ext_pwr_online(cm) || |
bb2a95c2 | 1059 | cm->status_save_batt != is_batt_present(cm)) { |
3bb3dbbd | 1060 | ret = false; |
bb2a95c2 AL |
1061 | break; |
1062 | } | |
3bb3dbbd DK |
1063 | } |
1064 | mutex_unlock(&cm_list_mtx); | |
1065 | ||
1066 | cm_rtc_set = cm_setup_timer(); | |
1067 | out: | |
1068 | /* It's about the time when the non-CM appointed timer goes off */ | |
1069 | if (rtc_wkalarm_save.enabled) { | |
1070 | unsigned long now; | |
1071 | struct rtc_time tmp; | |
1072 | ||
1073 | rtc_read_time(rtc_dev, &tmp); | |
1074 | rtc_tm_to_time(&tmp, &now); | |
1075 | ||
1076 | if (rtc_wkalarm_save_time && | |
1077 | now + CM_RTC_SMALL >= rtc_wkalarm_save_time) | |
1078 | return false; | |
1079 | } | |
1080 | return ret; | |
1081 | } | |
1082 | EXPORT_SYMBOL_GPL(cm_suspend_again); | |
1083 | ||
1084 | /** | |
1085 | * setup_charger_manager - initialize charger_global_desc data | |
1086 | * @gd: pointer to instance of charger_global_desc | |
1087 | */ | |
1088 | int setup_charger_manager(struct charger_global_desc *gd) | |
1089 | { | |
1090 | if (!gd) | |
1091 | return -EINVAL; | |
1092 | ||
1093 | if (rtc_dev) | |
1094 | rtc_class_close(rtc_dev); | |
1095 | rtc_dev = NULL; | |
1096 | g_desc = NULL; | |
1097 | ||
1098 | if (!gd->rtc_only_wakeup) { | |
1099 | pr_err("The callback rtc_only_wakeup is not given.\n"); | |
1100 | return -EINVAL; | |
1101 | } | |
1102 | ||
1103 | if (gd->rtc_name) { | |
1104 | rtc_dev = rtc_class_open(gd->rtc_name); | |
1105 | if (IS_ERR_OR_NULL(rtc_dev)) { | |
1106 | rtc_dev = NULL; | |
1107 | /* Retry at probe. RTC may be not registered yet */ | |
1108 | } | |
1109 | } else { | |
1110 | pr_warn("No wakeup timer is given for charger manager." | |
1111 | "In-suspend monitoring won't work.\n"); | |
1112 | } | |
1113 | ||
1114 | g_desc = gd; | |
1115 | return 0; | |
1116 | } | |
1117 | EXPORT_SYMBOL_GPL(setup_charger_manager); | |
1118 | ||
bee737bc CC |
1119 | /** |
1120 | * charger_extcon_work - enable/diable charger according to the state | |
1121 | * of charger cable | |
1122 | * | |
1123 | * @work: work_struct of the function charger_extcon_work. | |
1124 | */ | |
1125 | static void charger_extcon_work(struct work_struct *work) | |
1126 | { | |
1127 | struct charger_cable *cable = | |
1128 | container_of(work, struct charger_cable, wq); | |
45cd4fb2 CC |
1129 | int ret; |
1130 | ||
1131 | if (cable->attached && cable->min_uA != 0 && cable->max_uA != 0) { | |
1132 | ret = regulator_set_current_limit(cable->charger->consumer, | |
1133 | cable->min_uA, cable->max_uA); | |
1134 | if (ret < 0) { | |
1135 | pr_err("Cannot set current limit of %s (%s)\n", | |
1136 | cable->charger->regulator_name, cable->name); | |
1137 | return; | |
1138 | } | |
1139 | ||
1140 | pr_info("Set current limit of %s : %duA ~ %duA\n", | |
1141 | cable->charger->regulator_name, | |
1142 | cable->min_uA, cable->max_uA); | |
1143 | } | |
bee737bc CC |
1144 | |
1145 | try_charger_enable(cable->cm, cable->attached); | |
1146 | } | |
1147 | ||
1148 | /** | |
1149 | * charger_extcon_notifier - receive the state of charger cable | |
1150 | * when registered cable is attached or detached. | |
1151 | * | |
1152 | * @self: the notifier block of the charger_extcon_notifier. | |
1153 | * @event: the cable state. | |
1154 | * @ptr: the data pointer of notifier block. | |
1155 | */ | |
1156 | static int charger_extcon_notifier(struct notifier_block *self, | |
1157 | unsigned long event, void *ptr) | |
1158 | { | |
1159 | struct charger_cable *cable = | |
1160 | container_of(self, struct charger_cable, nb); | |
1161 | ||
2ed9e9b6 CC |
1162 | /* |
1163 | * The newly state of charger cable. | |
1164 | * If cable is attached, cable->attached is true. | |
1165 | */ | |
bee737bc | 1166 | cable->attached = event; |
2ed9e9b6 CC |
1167 | |
1168 | /* | |
1169 | * Setup monitoring to check battery state | |
1170 | * when charger cable is attached. | |
1171 | */ | |
1172 | if (cable->attached && is_polling_required(cable->cm)) { | |
1173 | if (work_pending(&setup_polling)) | |
1174 | cancel_work_sync(&setup_polling); | |
1175 | schedule_work(&setup_polling); | |
1176 | } | |
1177 | ||
1178 | /* | |
1179 | * Setup work for controlling charger(regulator) | |
1180 | * according to charger cable. | |
1181 | */ | |
bee737bc CC |
1182 | schedule_work(&cable->wq); |
1183 | ||
1184 | return NOTIFY_DONE; | |
1185 | } | |
1186 | ||
1187 | /** | |
1188 | * charger_extcon_init - register external connector to use it | |
1189 | * as the charger cable | |
1190 | * | |
1191 | * @cm: the Charger Manager representing the battery. | |
1192 | * @cable: the Charger cable representing the external connector. | |
1193 | */ | |
1194 | static int charger_extcon_init(struct charger_manager *cm, | |
1195 | struct charger_cable *cable) | |
1196 | { | |
1197 | int ret = 0; | |
1198 | ||
1199 | /* | |
1200 | * Charger manager use Extcon framework to identify | |
1201 | * the charger cable among various external connector | |
1202 | * cable (e.g., TA, USB, MHL, Dock). | |
1203 | */ | |
1204 | INIT_WORK(&cable->wq, charger_extcon_work); | |
1205 | cable->nb.notifier_call = charger_extcon_notifier; | |
1206 | ret = extcon_register_interest(&cable->extcon_dev, | |
1207 | cable->extcon_name, cable->name, &cable->nb); | |
1208 | if (ret < 0) { | |
1209 | pr_info("Cannot register extcon_dev for %s(cable: %s).\n", | |
1210 | cable->extcon_name, | |
1211 | cable->name); | |
1212 | ret = -EINVAL; | |
1213 | } | |
1214 | ||
1215 | return ret; | |
1216 | } | |
1217 | ||
3950c786 CC |
1218 | /* help function of sysfs node to control charger(regulator) */ |
1219 | static ssize_t charger_name_show(struct device *dev, | |
1220 | struct device_attribute *attr, char *buf) | |
1221 | { | |
1222 | struct charger_regulator *charger | |
1223 | = container_of(attr, struct charger_regulator, attr_name); | |
1224 | ||
1225 | return sprintf(buf, "%s\n", charger->regulator_name); | |
1226 | } | |
1227 | ||
1228 | static ssize_t charger_state_show(struct device *dev, | |
1229 | struct device_attribute *attr, char *buf) | |
1230 | { | |
1231 | struct charger_regulator *charger | |
1232 | = container_of(attr, struct charger_regulator, attr_state); | |
1233 | int state = 0; | |
1234 | ||
1235 | if (!charger->externally_control) | |
1236 | state = regulator_is_enabled(charger->consumer); | |
1237 | ||
1238 | return sprintf(buf, "%s\n", state ? "enabled" : "disabled"); | |
1239 | } | |
1240 | ||
1241 | static ssize_t charger_externally_control_show(struct device *dev, | |
1242 | struct device_attribute *attr, char *buf) | |
1243 | { | |
1244 | struct charger_regulator *charger = container_of(attr, | |
1245 | struct charger_regulator, attr_externally_control); | |
1246 | ||
1247 | return sprintf(buf, "%d\n", charger->externally_control); | |
1248 | } | |
1249 | ||
1250 | static ssize_t charger_externally_control_store(struct device *dev, | |
1251 | struct device_attribute *attr, const char *buf, | |
1252 | size_t count) | |
1253 | { | |
1254 | struct charger_regulator *charger | |
1255 | = container_of(attr, struct charger_regulator, | |
1256 | attr_externally_control); | |
1257 | struct charger_manager *cm = charger->cm; | |
1258 | struct charger_desc *desc = cm->desc; | |
1259 | int i; | |
1260 | int ret; | |
1261 | int externally_control; | |
1262 | int chargers_externally_control = 1; | |
1263 | ||
1264 | ret = sscanf(buf, "%d", &externally_control); | |
1265 | if (ret == 0) { | |
1266 | ret = -EINVAL; | |
1267 | return ret; | |
1268 | } | |
1269 | ||
1270 | if (!externally_control) { | |
1271 | charger->externally_control = 0; | |
1272 | return count; | |
1273 | } | |
1274 | ||
1275 | for (i = 0; i < desc->num_charger_regulators; i++) { | |
1276 | if (&desc->charger_regulators[i] != charger && | |
1277 | !desc->charger_regulators[i].externally_control) { | |
1278 | /* | |
1279 | * At least, one charger is controlled by | |
1280 | * charger-manager | |
1281 | */ | |
1282 | chargers_externally_control = 0; | |
1283 | break; | |
1284 | } | |
1285 | } | |
1286 | ||
1287 | if (!chargers_externally_control) { | |
1288 | if (cm->charger_enabled) { | |
1289 | try_charger_enable(charger->cm, false); | |
1290 | charger->externally_control = externally_control; | |
1291 | try_charger_enable(charger->cm, true); | |
1292 | } else { | |
1293 | charger->externally_control = externally_control; | |
1294 | } | |
1295 | } else { | |
1296 | dev_warn(cm->dev, | |
1297 | "'%s' regulator should be controlled " | |
1298 | "in charger-manager because charger-manager " | |
1299 | "must need at least one charger for charging\n", | |
1300 | charger->regulator_name); | |
1301 | } | |
1302 | ||
1303 | return count; | |
1304 | } | |
1305 | ||
3bb3dbbd DK |
1306 | static int charger_manager_probe(struct platform_device *pdev) |
1307 | { | |
1308 | struct charger_desc *desc = dev_get_platdata(&pdev->dev); | |
1309 | struct charger_manager *cm; | |
1310 | int ret = 0, i = 0; | |
bee737bc | 1311 | int j = 0; |
3950c786 | 1312 | int chargers_externally_control = 1; |
ad3d13ee | 1313 | union power_supply_propval val; |
3bb3dbbd DK |
1314 | |
1315 | if (g_desc && !rtc_dev && g_desc->rtc_name) { | |
1316 | rtc_dev = rtc_class_open(g_desc->rtc_name); | |
1317 | if (IS_ERR_OR_NULL(rtc_dev)) { | |
1318 | rtc_dev = NULL; | |
1319 | dev_err(&pdev->dev, "Cannot get RTC %s.\n", | |
1320 | g_desc->rtc_name); | |
1321 | ret = -ENODEV; | |
1322 | goto err_alloc; | |
1323 | } | |
1324 | } | |
1325 | ||
1326 | if (!desc) { | |
1327 | dev_err(&pdev->dev, "No platform data (desc) found.\n"); | |
1328 | ret = -ENODEV; | |
1329 | goto err_alloc; | |
1330 | } | |
1331 | ||
1332 | cm = kzalloc(sizeof(struct charger_manager), GFP_KERNEL); | |
1333 | if (!cm) { | |
1334 | dev_err(&pdev->dev, "Cannot allocate memory.\n"); | |
1335 | ret = -ENOMEM; | |
1336 | goto err_alloc; | |
1337 | } | |
1338 | ||
1339 | /* Basic Values. Unspecified are Null or 0 */ | |
1340 | cm->dev = &pdev->dev; | |
1341 | cm->desc = kzalloc(sizeof(struct charger_desc), GFP_KERNEL); | |
1342 | if (!cm->desc) { | |
1343 | dev_err(&pdev->dev, "Cannot allocate memory.\n"); | |
1344 | ret = -ENOMEM; | |
1345 | goto err_alloc_desc; | |
1346 | } | |
1347 | memcpy(cm->desc, desc, sizeof(struct charger_desc)); | |
1348 | cm->last_temp_mC = INT_MIN; /* denotes "unmeasured, yet" */ | |
1349 | ||
d829dc75 CC |
1350 | /* |
1351 | * The following two do not need to be errors. | |
1352 | * Users may intentionally ignore those two features. | |
1353 | */ | |
1354 | if (desc->fullbatt_uV == 0) { | |
1355 | dev_info(&pdev->dev, "Ignoring full-battery voltage threshold" | |
1356 | " as it is not supplied."); | |
1357 | } | |
1358 | if (!desc->fullbatt_vchkdrop_ms || !desc->fullbatt_vchkdrop_uV) { | |
1359 | dev_info(&pdev->dev, "Disabling full-battery voltage drop " | |
1360 | "checking mechanism as it is not supplied."); | |
1361 | desc->fullbatt_vchkdrop_ms = 0; | |
1362 | desc->fullbatt_vchkdrop_uV = 0; | |
1363 | } | |
2ed9e9b6 CC |
1364 | if (desc->fullbatt_soc == 0) { |
1365 | dev_info(&pdev->dev, "Ignoring full-battery soc(state of" | |
1366 | " charge) threshold as it is not" | |
1367 | " supplied."); | |
1368 | } | |
1369 | if (desc->fullbatt_full_capacity == 0) { | |
1370 | dev_info(&pdev->dev, "Ignoring full-battery full capacity" | |
1371 | " threshold as it is not supplied."); | |
1372 | } | |
d829dc75 | 1373 | |
3bb3dbbd DK |
1374 | if (!desc->charger_regulators || desc->num_charger_regulators < 1) { |
1375 | ret = -EINVAL; | |
1376 | dev_err(&pdev->dev, "charger_regulators undefined.\n"); | |
1377 | goto err_no_charger; | |
1378 | } | |
1379 | ||
1380 | if (!desc->psy_charger_stat || !desc->psy_charger_stat[0]) { | |
1381 | dev_err(&pdev->dev, "No power supply defined.\n"); | |
1382 | ret = -EINVAL; | |
1383 | goto err_no_charger_stat; | |
1384 | } | |
1385 | ||
1386 | /* Counting index only */ | |
1387 | while (desc->psy_charger_stat[i]) | |
1388 | i++; | |
1389 | ||
1390 | cm->charger_stat = kzalloc(sizeof(struct power_supply *) * (i + 1), | |
1391 | GFP_KERNEL); | |
1392 | if (!cm->charger_stat) { | |
1393 | ret = -ENOMEM; | |
1394 | goto err_no_charger_stat; | |
1395 | } | |
1396 | ||
1397 | for (i = 0; desc->psy_charger_stat[i]; i++) { | |
1398 | cm->charger_stat[i] = power_supply_get_by_name( | |
1399 | desc->psy_charger_stat[i]); | |
1400 | if (!cm->charger_stat[i]) { | |
1401 | dev_err(&pdev->dev, "Cannot find power supply " | |
1402 | "\"%s\"\n", | |
1403 | desc->psy_charger_stat[i]); | |
1404 | ret = -ENODEV; | |
1405 | goto err_chg_stat; | |
1406 | } | |
1407 | } | |
1408 | ||
1409 | cm->fuel_gauge = power_supply_get_by_name(desc->psy_fuel_gauge); | |
1410 | if (!cm->fuel_gauge) { | |
1411 | dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n", | |
1412 | desc->psy_fuel_gauge); | |
1413 | ret = -ENODEV; | |
1414 | goto err_chg_stat; | |
1415 | } | |
1416 | ||
1417 | if (desc->polling_interval_ms == 0 || | |
1418 | msecs_to_jiffies(desc->polling_interval_ms) <= CM_JIFFIES_SMALL) { | |
1419 | dev_err(&pdev->dev, "polling_interval_ms is too small\n"); | |
1420 | ret = -EINVAL; | |
1421 | goto err_chg_stat; | |
1422 | } | |
1423 | ||
1424 | if (!desc->temperature_out_of_range) { | |
1425 | dev_err(&pdev->dev, "there is no temperature_out_of_range\n"); | |
1426 | ret = -EINVAL; | |
1427 | goto err_chg_stat; | |
1428 | } | |
1429 | ||
8fcfe088 CC |
1430 | if (!desc->charging_max_duration_ms || |
1431 | !desc->discharging_max_duration_ms) { | |
1432 | dev_info(&pdev->dev, "Cannot limit charging duration " | |
1433 | "checking mechanism to prevent overcharge/overheat " | |
1434 | "and control discharging duration"); | |
1435 | desc->charging_max_duration_ms = 0; | |
1436 | desc->discharging_max_duration_ms = 0; | |
1437 | } | |
1438 | ||
3bb3dbbd DK |
1439 | platform_set_drvdata(pdev, cm); |
1440 | ||
bb2a95c2 AL |
1441 | memcpy(&cm->charger_psy, &psy_default, sizeof(psy_default)); |
1442 | ||
ad3d13ee | 1443 | if (!desc->psy_name) { |
bb2a95c2 | 1444 | strncpy(cm->psy_name_buf, psy_default.name, PSY_NAME_MAX); |
ad3d13ee DK |
1445 | } else { |
1446 | strncpy(cm->psy_name_buf, desc->psy_name, PSY_NAME_MAX); | |
1447 | } | |
1448 | cm->charger_psy.name = cm->psy_name_buf; | |
1449 | ||
1450 | /* Allocate for psy properties because they may vary */ | |
1451 | cm->charger_psy.properties = kzalloc(sizeof(enum power_supply_property) | |
1452 | * (ARRAY_SIZE(default_charger_props) + | |
1453 | NUM_CHARGER_PSY_OPTIONAL), | |
1454 | GFP_KERNEL); | |
1455 | if (!cm->charger_psy.properties) { | |
1456 | dev_err(&pdev->dev, "Cannot allocate for psy properties.\n"); | |
1457 | ret = -ENOMEM; | |
1458 | goto err_chg_stat; | |
1459 | } | |
1460 | memcpy(cm->charger_psy.properties, default_charger_props, | |
1461 | sizeof(enum power_supply_property) * | |
1462 | ARRAY_SIZE(default_charger_props)); | |
1463 | cm->charger_psy.num_properties = psy_default.num_properties; | |
1464 | ||
1465 | /* Find which optional psy-properties are available */ | |
1466 | if (!cm->fuel_gauge->get_property(cm->fuel_gauge, | |
1467 | POWER_SUPPLY_PROP_CHARGE_NOW, &val)) { | |
1468 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1469 | POWER_SUPPLY_PROP_CHARGE_NOW; | |
1470 | cm->charger_psy.num_properties++; | |
1471 | } | |
1472 | if (!cm->fuel_gauge->get_property(cm->fuel_gauge, | |
1473 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
1474 | &val)) { | |
1475 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1476 | POWER_SUPPLY_PROP_CURRENT_NOW; | |
1477 | cm->charger_psy.num_properties++; | |
1478 | } | |
bb2a95c2 | 1479 | |
ad3d13ee DK |
1480 | if (desc->measure_battery_temp) { |
1481 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1482 | POWER_SUPPLY_PROP_TEMP; | |
1483 | cm->charger_psy.num_properties++; | |
bb2a95c2 AL |
1484 | } else { |
1485 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1486 | POWER_SUPPLY_PROP_TEMP_AMBIENT; | |
1487 | cm->charger_psy.num_properties++; | |
ad3d13ee DK |
1488 | } |
1489 | ||
d829dc75 CC |
1490 | INIT_DELAYED_WORK(&cm->fullbatt_vchk_work, fullbatt_vchk); |
1491 | ||
ad3d13ee DK |
1492 | ret = power_supply_register(NULL, &cm->charger_psy); |
1493 | if (ret) { | |
1494 | dev_err(&pdev->dev, "Cannot register charger-manager with" | |
1495 | " name \"%s\".\n", cm->charger_psy.name); | |
1496 | goto err_register; | |
1497 | } | |
1498 | ||
bee737bc CC |
1499 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
1500 | struct charger_regulator *charger | |
1501 | = &desc->charger_regulators[i]; | |
3950c786 CC |
1502 | char buf[11]; |
1503 | char *str; | |
bee737bc CC |
1504 | |
1505 | charger->consumer = regulator_get(&pdev->dev, | |
1506 | charger->regulator_name); | |
1507 | if (charger->consumer == NULL) { | |
1508 | dev_err(&pdev->dev, "Cannot find charger(%s)n", | |
1509 | charger->regulator_name); | |
1510 | ret = -EINVAL; | |
1511 | goto err_chg_get; | |
1512 | } | |
3950c786 | 1513 | charger->cm = cm; |
bee737bc CC |
1514 | |
1515 | for (j = 0 ; j < charger->num_cables ; j++) { | |
1516 | struct charger_cable *cable = &charger->cables[j]; | |
1517 | ||
1518 | ret = charger_extcon_init(cm, cable); | |
1519 | if (ret < 0) { | |
1520 | dev_err(&pdev->dev, "Cannot find charger(%s)n", | |
1521 | charger->regulator_name); | |
1522 | goto err_extcon; | |
1523 | } | |
1524 | cable->charger = charger; | |
1525 | cable->cm = cm; | |
1526 | } | |
3950c786 CC |
1527 | |
1528 | /* Create sysfs entry to control charger(regulator) */ | |
1529 | snprintf(buf, 10, "charger.%d", i); | |
1530 | str = kzalloc(sizeof(char) * (strlen(buf) + 1), GFP_KERNEL); | |
1531 | if (!str) { | |
1532 | for (i--; i >= 0; i--) { | |
1533 | charger = &desc->charger_regulators[i]; | |
1534 | kfree(charger->attr_g.name); | |
1535 | } | |
1536 | ret = -ENOMEM; | |
1537 | ||
1538 | goto err_extcon; | |
1539 | } | |
1540 | strcpy(str, buf); | |
1541 | ||
1542 | charger->attrs[0] = &charger->attr_name.attr; | |
1543 | charger->attrs[1] = &charger->attr_state.attr; | |
1544 | charger->attrs[2] = &charger->attr_externally_control.attr; | |
1545 | charger->attrs[3] = NULL; | |
1546 | charger->attr_g.name = str; | |
1547 | charger->attr_g.attrs = charger->attrs; | |
1548 | ||
1549 | sysfs_attr_init(&charger->attr_name.attr); | |
1550 | charger->attr_name.attr.name = "name"; | |
1551 | charger->attr_name.attr.mode = 0444; | |
1552 | charger->attr_name.show = charger_name_show; | |
1553 | ||
1554 | sysfs_attr_init(&charger->attr_state.attr); | |
1555 | charger->attr_state.attr.name = "state"; | |
1556 | charger->attr_state.attr.mode = 0444; | |
1557 | charger->attr_state.show = charger_state_show; | |
1558 | ||
1559 | sysfs_attr_init(&charger->attr_externally_control.attr); | |
1560 | charger->attr_externally_control.attr.name | |
1561 | = "externally_control"; | |
1562 | charger->attr_externally_control.attr.mode = 0644; | |
1563 | charger->attr_externally_control.show | |
1564 | = charger_externally_control_show; | |
1565 | charger->attr_externally_control.store | |
1566 | = charger_externally_control_store; | |
1567 | ||
1568 | if (!desc->charger_regulators[i].externally_control || | |
1569 | !chargers_externally_control) { | |
1570 | chargers_externally_control = 0; | |
1571 | } | |
1572 | dev_info(&pdev->dev, "'%s' regulator's externally_control" | |
1573 | "is %d\n", charger->regulator_name, | |
1574 | charger->externally_control); | |
1575 | ||
1576 | ret = sysfs_create_group(&cm->charger_psy.dev->kobj, | |
1577 | &charger->attr_g); | |
1578 | if (ret < 0) { | |
1579 | dev_info(&pdev->dev, "Cannot create sysfs entry" | |
1580 | "of %s regulator\n", | |
1581 | charger->regulator_name); | |
1582 | } | |
1583 | } | |
1584 | ||
1585 | if (chargers_externally_control) { | |
1586 | dev_err(&pdev->dev, "Cannot register regulator because " | |
1587 | "charger-manager must need at least " | |
1588 | "one charger for charging battery\n"); | |
1589 | ||
1590 | ret = -EINVAL; | |
1591 | goto err_chg_enable; | |
3bb3dbbd DK |
1592 | } |
1593 | ||
1594 | ret = try_charger_enable(cm, true); | |
1595 | if (ret) { | |
1596 | dev_err(&pdev->dev, "Cannot enable charger regulators\n"); | |
1597 | goto err_chg_enable; | |
1598 | } | |
1599 | ||
1600 | /* Add to the list */ | |
1601 | mutex_lock(&cm_list_mtx); | |
1602 | list_add(&cm->entry, &cm_list); | |
1603 | mutex_unlock(&cm_list_mtx); | |
1604 | ||
dfeccb12 CC |
1605 | /* |
1606 | * Charger-manager is capable of waking up the systme from sleep | |
1607 | * when event is happend through cm_notify_event() | |
1608 | */ | |
1609 | device_init_wakeup(&pdev->dev, true); | |
1610 | device_set_wakeup_capable(&pdev->dev, false); | |
1611 | ||
d829dc75 CC |
1612 | schedule_work(&setup_polling); |
1613 | ||
3bb3dbbd DK |
1614 | return 0; |
1615 | ||
1616 | err_chg_enable: | |
3950c786 CC |
1617 | for (i = 0; i < desc->num_charger_regulators; i++) { |
1618 | struct charger_regulator *charger; | |
1619 | ||
1620 | charger = &desc->charger_regulators[i]; | |
1621 | sysfs_remove_group(&cm->charger_psy.dev->kobj, | |
1622 | &charger->attr_g); | |
1623 | kfree(charger->attr_g.name); | |
1624 | } | |
bee737bc CC |
1625 | err_extcon: |
1626 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { | |
1627 | struct charger_regulator *charger | |
1628 | = &desc->charger_regulators[i]; | |
1629 | for (j = 0 ; j < charger->num_cables ; j++) { | |
1630 | struct charger_cable *cable = &charger->cables[j]; | |
1631 | extcon_unregister_interest(&cable->extcon_dev); | |
1632 | } | |
1633 | } | |
1634 | err_chg_get: | |
1635 | for (i = 0 ; i < desc->num_charger_regulators ; i++) | |
1636 | regulator_put(desc->charger_regulators[i].consumer); | |
1637 | ||
ad3d13ee DK |
1638 | power_supply_unregister(&cm->charger_psy); |
1639 | err_register: | |
1640 | kfree(cm->charger_psy.properties); | |
3bb3dbbd DK |
1641 | err_chg_stat: |
1642 | kfree(cm->charger_stat); | |
1643 | err_no_charger_stat: | |
1644 | err_no_charger: | |
1645 | kfree(cm->desc); | |
1646 | err_alloc_desc: | |
1647 | kfree(cm); | |
1648 | err_alloc: | |
1649 | return ret; | |
1650 | } | |
1651 | ||
415ec69f | 1652 | static int charger_manager_remove(struct platform_device *pdev) |
3bb3dbbd DK |
1653 | { |
1654 | struct charger_manager *cm = platform_get_drvdata(pdev); | |
1655 | struct charger_desc *desc = cm->desc; | |
bee737bc CC |
1656 | int i = 0; |
1657 | int j = 0; | |
3bb3dbbd DK |
1658 | |
1659 | /* Remove from the list */ | |
1660 | mutex_lock(&cm_list_mtx); | |
1661 | list_del(&cm->entry); | |
1662 | mutex_unlock(&cm_list_mtx); | |
1663 | ||
d829dc75 CC |
1664 | if (work_pending(&setup_polling)) |
1665 | cancel_work_sync(&setup_polling); | |
1666 | if (delayed_work_pending(&cm_monitor_work)) | |
1667 | cancel_delayed_work_sync(&cm_monitor_work); | |
1668 | ||
bee737bc CC |
1669 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
1670 | struct charger_regulator *charger | |
1671 | = &desc->charger_regulators[i]; | |
1672 | for (j = 0 ; j < charger->num_cables ; j++) { | |
1673 | struct charger_cable *cable = &charger->cables[j]; | |
1674 | extcon_unregister_interest(&cable->extcon_dev); | |
1675 | } | |
1676 | } | |
1677 | ||
1678 | for (i = 0 ; i < desc->num_charger_regulators ; i++) | |
1679 | regulator_put(desc->charger_regulators[i].consumer); | |
1680 | ||
ad3d13ee | 1681 | power_supply_unregister(&cm->charger_psy); |
d829dc75 CC |
1682 | |
1683 | try_charger_enable(cm, false); | |
1684 | ||
ad3d13ee | 1685 | kfree(cm->charger_psy.properties); |
3bb3dbbd DK |
1686 | kfree(cm->charger_stat); |
1687 | kfree(cm->desc); | |
1688 | kfree(cm); | |
1689 | ||
1690 | return 0; | |
1691 | } | |
1692 | ||
1bbe24d4 | 1693 | static const struct platform_device_id charger_manager_id[] = { |
3bb3dbbd DK |
1694 | { "charger-manager", 0 }, |
1695 | { }, | |
1696 | }; | |
1bbe24d4 | 1697 | MODULE_DEVICE_TABLE(platform, charger_manager_id); |
3bb3dbbd | 1698 | |
dfeccb12 CC |
1699 | static int cm_suspend_noirq(struct device *dev) |
1700 | { | |
1701 | int ret = 0; | |
1702 | ||
1703 | if (device_may_wakeup(dev)) { | |
1704 | device_set_wakeup_capable(dev, false); | |
1705 | ret = -EAGAIN; | |
1706 | } | |
1707 | ||
1708 | return ret; | |
1709 | } | |
1710 | ||
3bb3dbbd DK |
1711 | static int cm_suspend_prepare(struct device *dev) |
1712 | { | |
bb2a95c2 | 1713 | struct charger_manager *cm = dev_get_drvdata(dev); |
3bb3dbbd DK |
1714 | |
1715 | if (!cm_suspended) { | |
1716 | if (rtc_dev) { | |
1717 | struct rtc_time tmp; | |
1718 | unsigned long now; | |
1719 | ||
1720 | rtc_read_alarm(rtc_dev, &rtc_wkalarm_save); | |
1721 | rtc_read_time(rtc_dev, &tmp); | |
1722 | ||
1723 | if (rtc_wkalarm_save.enabled) { | |
1724 | rtc_tm_to_time(&rtc_wkalarm_save.time, | |
1725 | &rtc_wkalarm_save_time); | |
1726 | rtc_tm_to_time(&tmp, &now); | |
1727 | if (now > rtc_wkalarm_save_time) | |
1728 | rtc_wkalarm_save_time = 0; | |
1729 | } else { | |
1730 | rtc_wkalarm_save_time = 0; | |
1731 | } | |
1732 | } | |
1733 | cm_suspended = true; | |
1734 | } | |
1735 | ||
d829dc75 CC |
1736 | if (delayed_work_pending(&cm->fullbatt_vchk_work)) |
1737 | cancel_delayed_work(&cm->fullbatt_vchk_work); | |
3bb3dbbd DK |
1738 | cm->status_save_ext_pwr_inserted = is_ext_pwr_online(cm); |
1739 | cm->status_save_batt = is_batt_present(cm); | |
1740 | ||
1741 | if (!cm_rtc_set) { | |
1742 | cm_suspend_duration_ms = 0; | |
1743 | cm_rtc_set = cm_setup_timer(); | |
1744 | } | |
1745 | ||
1746 | return 0; | |
1747 | } | |
1748 | ||
1749 | static void cm_suspend_complete(struct device *dev) | |
1750 | { | |
bb2a95c2 | 1751 | struct charger_manager *cm = dev_get_drvdata(dev); |
3bb3dbbd DK |
1752 | |
1753 | if (cm_suspended) { | |
1754 | if (rtc_dev) { | |
1755 | struct rtc_wkalrm tmp; | |
1756 | ||
1757 | rtc_read_alarm(rtc_dev, &tmp); | |
1758 | rtc_wkalarm_save.pending = tmp.pending; | |
1759 | rtc_set_alarm(rtc_dev, &rtc_wkalarm_save); | |
1760 | } | |
1761 | cm_suspended = false; | |
1762 | cm_rtc_set = false; | |
1763 | } | |
1764 | ||
d829dc75 CC |
1765 | /* Re-enqueue delayed work (fullbatt_vchk_work) */ |
1766 | if (cm->fullbatt_vchk_jiffies_at) { | |
1767 | unsigned long delay = 0; | |
1768 | unsigned long now = jiffies + CM_JIFFIES_SMALL; | |
1769 | ||
1770 | if (time_after_eq(now, cm->fullbatt_vchk_jiffies_at)) { | |
1771 | delay = (unsigned long)((long)now | |
1772 | - (long)(cm->fullbatt_vchk_jiffies_at)); | |
1773 | delay = jiffies_to_msecs(delay); | |
1774 | } else { | |
1775 | delay = 0; | |
1776 | } | |
1777 | ||
1778 | /* | |
1779 | * Account for cm_suspend_duration_ms if | |
1780 | * assume_timer_stops_in_suspend is active | |
1781 | */ | |
1782 | if (g_desc && g_desc->assume_timer_stops_in_suspend) { | |
1783 | if (delay > cm_suspend_duration_ms) | |
1784 | delay -= cm_suspend_duration_ms; | |
1785 | else | |
1786 | delay = 0; | |
1787 | } | |
1788 | ||
1789 | queue_delayed_work(cm_wq, &cm->fullbatt_vchk_work, | |
1790 | msecs_to_jiffies(delay)); | |
1791 | } | |
dfeccb12 | 1792 | device_set_wakeup_capable(cm->dev, false); |
3bb3dbbd DK |
1793 | uevent_notify(cm, NULL); |
1794 | } | |
1795 | ||
1796 | static const struct dev_pm_ops charger_manager_pm = { | |
1797 | .prepare = cm_suspend_prepare, | |
dfeccb12 | 1798 | .suspend_noirq = cm_suspend_noirq, |
3bb3dbbd DK |
1799 | .complete = cm_suspend_complete, |
1800 | }; | |
1801 | ||
1802 | static struct platform_driver charger_manager_driver = { | |
1803 | .driver = { | |
1804 | .name = "charger-manager", | |
1805 | .owner = THIS_MODULE, | |
1806 | .pm = &charger_manager_pm, | |
1807 | }, | |
1808 | .probe = charger_manager_probe, | |
28ea73f4 | 1809 | .remove = charger_manager_remove, |
3bb3dbbd DK |
1810 | .id_table = charger_manager_id, |
1811 | }; | |
1812 | ||
1813 | static int __init charger_manager_init(void) | |
1814 | { | |
d829dc75 CC |
1815 | cm_wq = create_freezable_workqueue("charger_manager"); |
1816 | INIT_DELAYED_WORK(&cm_monitor_work, cm_monitor_poller); | |
1817 | ||
3bb3dbbd DK |
1818 | return platform_driver_register(&charger_manager_driver); |
1819 | } | |
1820 | late_initcall(charger_manager_init); | |
1821 | ||
1822 | static void __exit charger_manager_cleanup(void) | |
1823 | { | |
d829dc75 CC |
1824 | destroy_workqueue(cm_wq); |
1825 | cm_wq = NULL; | |
1826 | ||
3bb3dbbd DK |
1827 | platform_driver_unregister(&charger_manager_driver); |
1828 | } | |
1829 | module_exit(charger_manager_cleanup); | |
1830 | ||
dfeccb12 CC |
1831 | /** |
1832 | * find_power_supply - find the associated power_supply of charger | |
1833 | * @cm: the Charger Manager representing the battery | |
1834 | * @psy: pointer to instance of charger's power_supply | |
1835 | */ | |
1836 | static bool find_power_supply(struct charger_manager *cm, | |
1837 | struct power_supply *psy) | |
1838 | { | |
1839 | int i; | |
1840 | bool found = false; | |
1841 | ||
1842 | for (i = 0; cm->charger_stat[i]; i++) { | |
1843 | if (psy == cm->charger_stat[i]) { | |
1844 | found = true; | |
1845 | break; | |
1846 | } | |
1847 | } | |
1848 | ||
1849 | return found; | |
1850 | } | |
1851 | ||
1852 | /** | |
1853 | * cm_notify_event - charger driver notify Charger Manager of charger event | |
1854 | * @psy: pointer to instance of charger's power_supply | |
1855 | * @type: type of charger event | |
1856 | * @msg: optional message passed to uevent_notify fuction | |
1857 | */ | |
1858 | void cm_notify_event(struct power_supply *psy, enum cm_event_types type, | |
1859 | char *msg) | |
1860 | { | |
1861 | struct charger_manager *cm; | |
1862 | bool found_power_supply = false; | |
1863 | ||
1864 | if (psy == NULL) | |
1865 | return; | |
1866 | ||
1867 | mutex_lock(&cm_list_mtx); | |
1868 | list_for_each_entry(cm, &cm_list, entry) { | |
1869 | found_power_supply = find_power_supply(cm, psy); | |
1870 | if (found_power_supply) | |
1871 | break; | |
1872 | } | |
1873 | mutex_unlock(&cm_list_mtx); | |
1874 | ||
1875 | if (!found_power_supply) | |
1876 | return; | |
1877 | ||
1878 | switch (type) { | |
1879 | case CM_EVENT_BATT_FULL: | |
1880 | fullbatt_handler(cm); | |
1881 | break; | |
1882 | case CM_EVENT_BATT_OUT: | |
1883 | battout_handler(cm); | |
1884 | break; | |
1885 | case CM_EVENT_BATT_IN: | |
1886 | case CM_EVENT_EXT_PWR_IN_OUT ... CM_EVENT_CHG_START_STOP: | |
1887 | misc_event_handler(cm, type); | |
1888 | break; | |
1889 | case CM_EVENT_UNKNOWN: | |
1890 | case CM_EVENT_OTHERS: | |
1891 | uevent_notify(cm, msg ? msg : default_event_names[type]); | |
1892 | break; | |
1893 | default: | |
1894 | dev_err(cm->dev, "%s type not specified.\n", __func__); | |
1895 | break; | |
1896 | } | |
1897 | } | |
1898 | EXPORT_SYMBOL_GPL(cm_notify_event); | |
1899 | ||
3bb3dbbd DK |
1900 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); |
1901 | MODULE_DESCRIPTION("Charger Manager"); | |
1902 | MODULE_LICENSE("GPL"); |