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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 */ | |
242 | if (!is_batt_present(cm)) { | |
243 | val.intval = 0; | |
244 | goto out; | |
245 | } | |
246 | ||
247 | if (cm->fuel_gauge && desc->fullbatt_full_capacity > 0) { | |
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); | |
251 | if (!ret && val.intval > desc->fullbatt_full_capacity) { | |
252 | val.intval = 1; | |
253 | goto out; | |
254 | } | |
255 | } | |
256 | ||
257 | /* Full, if it's over the fullbatt voltage */ | |
258 | if (desc->fullbatt_uV > 0) { | |
259 | ret = get_batt_uV(cm, &uV); | |
260 | if (!ret && uV >= desc->fullbatt_uV) { | |
261 | val.intval = 1; | |
262 | goto out; | |
263 | } | |
264 | } | |
265 | ||
266 | /* Full, if the capacity is more than fullbatt_soc */ | |
267 | if (cm->fuel_gauge && desc->fullbatt_soc > 0) { | |
268 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
269 | POWER_SUPPLY_PROP_CAPACITY, &val); | |
270 | if (!ret && val.intval >= desc->fullbatt_soc) { | |
271 | val.intval = 1; | |
272 | goto out; | |
273 | } | |
274 | } | |
275 | ||
276 | val.intval = 0; | |
277 | ||
278 | out: | |
279 | return val.intval ? true : false; | |
280 | } | |
281 | ||
3bb3dbbd DK |
282 | /** |
283 | * is_polling_required - Return true if need to continue polling for this CM. | |
284 | * @cm: the Charger Manager representing the battery. | |
285 | */ | |
286 | static bool is_polling_required(struct charger_manager *cm) | |
287 | { | |
288 | switch (cm->desc->polling_mode) { | |
289 | case CM_POLL_DISABLE: | |
290 | return false; | |
291 | case CM_POLL_ALWAYS: | |
292 | return true; | |
293 | case CM_POLL_EXTERNAL_POWER_ONLY: | |
294 | return is_ext_pwr_online(cm); | |
295 | case CM_POLL_CHARGING_ONLY: | |
296 | return is_charging(cm); | |
297 | default: | |
298 | dev_warn(cm->dev, "Incorrect polling_mode (%d)\n", | |
299 | cm->desc->polling_mode); | |
300 | } | |
301 | ||
302 | return false; | |
303 | } | |
304 | ||
305 | /** | |
306 | * try_charger_enable - Enable/Disable chargers altogether | |
307 | * @cm: the Charger Manager representing the battery. | |
308 | * @enable: true: enable / false: disable | |
309 | * | |
310 | * Note that Charger Manager keeps the charger enabled regardless whether | |
311 | * the charger is charging or not (because battery is full or no external | |
312 | * power source exists) except when CM needs to disable chargers forcibly | |
313 | * bacause of emergency causes; when the battery is overheated or too cold. | |
314 | */ | |
315 | static int try_charger_enable(struct charger_manager *cm, bool enable) | |
316 | { | |
317 | int err = 0, i; | |
318 | struct charger_desc *desc = cm->desc; | |
319 | ||
320 | /* Ignore if it's redundent command */ | |
bb2a95c2 | 321 | if (enable == cm->charger_enabled) |
3bb3dbbd DK |
322 | return 0; |
323 | ||
324 | if (enable) { | |
325 | if (cm->emergency_stop) | |
326 | return -EAGAIN; | |
8fcfe088 CC |
327 | |
328 | /* | |
329 | * Save start time of charging to limit | |
330 | * maximum possible charging time. | |
331 | */ | |
332 | cm->charging_start_time = ktime_to_ms(ktime_get()); | |
333 | cm->charging_end_time = 0; | |
334 | ||
dbb61fc7 | 335 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
3950c786 CC |
336 | if (desc->charger_regulators[i].externally_control) |
337 | continue; | |
338 | ||
dbb61fc7 CC |
339 | err = regulator_enable(desc->charger_regulators[i].consumer); |
340 | if (err < 0) { | |
341 | dev_warn(cm->dev, | |
342 | "Cannot enable %s regulator\n", | |
343 | desc->charger_regulators[i].regulator_name); | |
344 | } | |
345 | } | |
3bb3dbbd | 346 | } else { |
8fcfe088 CC |
347 | /* |
348 | * Save end time of charging to maintain fully charged state | |
349 | * of battery after full-batt. | |
350 | */ | |
351 | cm->charging_start_time = 0; | |
352 | cm->charging_end_time = ktime_to_ms(ktime_get()); | |
353 | ||
dbb61fc7 | 354 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
3950c786 CC |
355 | if (desc->charger_regulators[i].externally_control) |
356 | continue; | |
357 | ||
dbb61fc7 CC |
358 | err = regulator_disable(desc->charger_regulators[i].consumer); |
359 | if (err < 0) { | |
360 | dev_warn(cm->dev, | |
361 | "Cannot disable %s regulator\n", | |
362 | desc->charger_regulators[i].regulator_name); | |
363 | } | |
364 | } | |
365 | ||
3bb3dbbd DK |
366 | /* |
367 | * Abnormal battery state - Stop charging forcibly, | |
368 | * even if charger was enabled at the other places | |
369 | */ | |
3bb3dbbd DK |
370 | for (i = 0; i < desc->num_charger_regulators; i++) { |
371 | if (regulator_is_enabled( | |
372 | desc->charger_regulators[i].consumer)) { | |
373 | regulator_force_disable( | |
374 | desc->charger_regulators[i].consumer); | |
375 | dev_warn(cm->dev, | |
376 | "Disable regulator(%s) forcibly.\n", | |
bee737bc | 377 | desc->charger_regulators[i].regulator_name); |
3bb3dbbd DK |
378 | } |
379 | } | |
380 | } | |
381 | ||
382 | if (!err) | |
383 | cm->charger_enabled = enable; | |
384 | ||
385 | return err; | |
386 | } | |
387 | ||
d829dc75 CC |
388 | /** |
389 | * try_charger_restart - Restart charging. | |
390 | * @cm: the Charger Manager representing the battery. | |
391 | * | |
392 | * Restart charging by turning off and on the charger. | |
393 | */ | |
394 | static int try_charger_restart(struct charger_manager *cm) | |
395 | { | |
396 | int err; | |
397 | ||
398 | if (cm->emergency_stop) | |
399 | return -EAGAIN; | |
400 | ||
401 | err = try_charger_enable(cm, false); | |
402 | if (err) | |
403 | return err; | |
404 | ||
405 | return try_charger_enable(cm, true); | |
406 | } | |
407 | ||
3bb3dbbd DK |
408 | /** |
409 | * uevent_notify - Let users know something has changed. | |
410 | * @cm: the Charger Manager representing the battery. | |
411 | * @event: the event string. | |
412 | * | |
413 | * If @event is null, it implies that uevent_notify is called | |
414 | * by resume function. When called in the resume function, cm_suspended | |
415 | * should be already reset to false in order to let uevent_notify | |
416 | * notify the recent event during the suspend to users. While | |
417 | * suspended, uevent_notify does not notify users, but tracks | |
418 | * events so that uevent_notify can notify users later after resumed. | |
419 | */ | |
420 | static void uevent_notify(struct charger_manager *cm, const char *event) | |
421 | { | |
422 | static char env_str[UEVENT_BUF_SIZE + 1] = ""; | |
423 | static char env_str_save[UEVENT_BUF_SIZE + 1] = ""; | |
424 | ||
425 | if (cm_suspended) { | |
426 | /* Nothing in suspended-event buffer */ | |
427 | if (env_str_save[0] == 0) { | |
428 | if (!strncmp(env_str, event, UEVENT_BUF_SIZE)) | |
429 | return; /* status not changed */ | |
430 | strncpy(env_str_save, event, UEVENT_BUF_SIZE); | |
431 | return; | |
432 | } | |
433 | ||
434 | if (!strncmp(env_str_save, event, UEVENT_BUF_SIZE)) | |
435 | return; /* Duplicated. */ | |
bb2a95c2 | 436 | strncpy(env_str_save, event, UEVENT_BUF_SIZE); |
3bb3dbbd DK |
437 | return; |
438 | } | |
439 | ||
440 | if (event == NULL) { | |
441 | /* No messages pending */ | |
442 | if (!env_str_save[0]) | |
443 | return; | |
444 | ||
445 | strncpy(env_str, env_str_save, UEVENT_BUF_SIZE); | |
446 | kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE); | |
447 | env_str_save[0] = 0; | |
448 | ||
449 | return; | |
450 | } | |
451 | ||
452 | /* status not changed */ | |
453 | if (!strncmp(env_str, event, UEVENT_BUF_SIZE)) | |
454 | return; | |
455 | ||
456 | /* save the status and notify the update */ | |
457 | strncpy(env_str, event, UEVENT_BUF_SIZE); | |
458 | kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE); | |
459 | ||
460 | dev_info(cm->dev, event); | |
461 | } | |
462 | ||
d829dc75 CC |
463 | /** |
464 | * fullbatt_vchk - Check voltage drop some times after "FULL" event. | |
465 | * @work: the work_struct appointing the function | |
466 | * | |
467 | * If a user has designated "fullbatt_vchkdrop_ms/uV" values with | |
468 | * charger_desc, Charger Manager checks voltage drop after the battery | |
469 | * "FULL" event. It checks whether the voltage has dropped more than | |
470 | * fullbatt_vchkdrop_uV by calling this function after fullbatt_vchkrop_ms. | |
471 | */ | |
472 | static void fullbatt_vchk(struct work_struct *work) | |
473 | { | |
474 | struct delayed_work *dwork = to_delayed_work(work); | |
475 | struct charger_manager *cm = container_of(dwork, | |
476 | struct charger_manager, fullbatt_vchk_work); | |
477 | struct charger_desc *desc = cm->desc; | |
478 | int batt_uV, err, diff; | |
479 | ||
480 | /* remove the appointment for fullbatt_vchk */ | |
481 | cm->fullbatt_vchk_jiffies_at = 0; | |
482 | ||
483 | if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms) | |
484 | return; | |
485 | ||
486 | err = get_batt_uV(cm, &batt_uV); | |
487 | if (err) { | |
488 | dev_err(cm->dev, "%s: get_batt_uV error(%d).\n", __func__, err); | |
489 | return; | |
490 | } | |
491 | ||
fd65ee5f | 492 | diff = desc->fullbatt_uV; |
d829dc75 CC |
493 | diff -= batt_uV; |
494 | ||
2ed9e9b6 | 495 | dev_info(cm->dev, "VBATT dropped %duV after full-batt.\n", diff); |
d829dc75 CC |
496 | |
497 | if (diff > desc->fullbatt_vchkdrop_uV) { | |
498 | try_charger_restart(cm); | |
8fcfe088 CC |
499 | uevent_notify(cm, "Recharging"); |
500 | } | |
501 | } | |
502 | ||
503 | /** | |
504 | * check_charging_duration - Monitor charging/discharging duration | |
505 | * @cm: the Charger Manager representing the battery. | |
506 | * | |
507 | * If whole charging duration exceed 'charging_max_duration_ms', | |
508 | * cm stop charging to prevent overcharge/overheat. If discharging | |
509 | * duration exceed 'discharging _max_duration_ms', charger cable is | |
510 | * attached, after full-batt, cm start charging to maintain fully | |
511 | * charged state for battery. | |
512 | */ | |
513 | static int check_charging_duration(struct charger_manager *cm) | |
514 | { | |
515 | struct charger_desc *desc = cm->desc; | |
516 | u64 curr = ktime_to_ms(ktime_get()); | |
517 | u64 duration; | |
518 | int ret = false; | |
519 | ||
520 | if (!desc->charging_max_duration_ms && | |
521 | !desc->discharging_max_duration_ms) | |
522 | return ret; | |
523 | ||
524 | if (cm->charger_enabled) { | |
525 | duration = curr - cm->charging_start_time; | |
526 | ||
527 | if (duration > desc->charging_max_duration_ms) { | |
528 | dev_info(cm->dev, "Charging duration exceed %lldms", | |
529 | desc->charging_max_duration_ms); | |
530 | uevent_notify(cm, "Discharging"); | |
531 | try_charger_enable(cm, false); | |
532 | ret = true; | |
533 | } | |
534 | } else if (is_ext_pwr_online(cm) && !cm->charger_enabled) { | |
535 | duration = curr - cm->charging_end_time; | |
536 | ||
537 | if (duration > desc->charging_max_duration_ms && | |
538 | is_ext_pwr_online(cm)) { | |
539 | dev_info(cm->dev, "DisCharging duration exceed %lldms", | |
540 | desc->discharging_max_duration_ms); | |
541 | uevent_notify(cm, "Recharing"); | |
542 | try_charger_enable(cm, true); | |
543 | ret = true; | |
544 | } | |
d829dc75 | 545 | } |
8fcfe088 CC |
546 | |
547 | return ret; | |
d829dc75 CC |
548 | } |
549 | ||
3bb3dbbd DK |
550 | /** |
551 | * _cm_monitor - Monitor the temperature and return true for exceptions. | |
552 | * @cm: the Charger Manager representing the battery. | |
553 | * | |
554 | * Returns true if there is an event to notify for the battery. | |
555 | * (True if the status of "emergency_stop" changes) | |
556 | */ | |
557 | static bool _cm_monitor(struct charger_manager *cm) | |
558 | { | |
559 | struct charger_desc *desc = cm->desc; | |
560 | int temp = desc->temperature_out_of_range(&cm->last_temp_mC); | |
561 | ||
562 | dev_dbg(cm->dev, "monitoring (%2.2d.%3.3dC)\n", | |
563 | cm->last_temp_mC / 1000, cm->last_temp_mC % 1000); | |
564 | ||
2ed9e9b6 CC |
565 | /* It has been stopped already */ |
566 | if (temp && cm->emergency_stop) | |
3bb3dbbd DK |
567 | return false; |
568 | ||
2ed9e9b6 CC |
569 | /* |
570 | * Check temperature whether overheat or cold. | |
571 | * If temperature is out of range normal state, stop charging. | |
572 | */ | |
3bb3dbbd DK |
573 | if (temp) { |
574 | cm->emergency_stop = temp; | |
575 | if (!try_charger_enable(cm, false)) { | |
576 | if (temp > 0) | |
577 | uevent_notify(cm, "OVERHEAT"); | |
578 | else | |
579 | uevent_notify(cm, "COLD"); | |
580 | } | |
2ed9e9b6 | 581 | |
8fcfe088 CC |
582 | /* |
583 | * Check whole charging duration and discharing duration | |
584 | * after full-batt. | |
585 | */ | |
586 | } else if (!cm->emergency_stop && check_charging_duration(cm)) { | |
587 | dev_dbg(cm->dev, | |
588 | "Charging/Discharging duration is out of range"); | |
2ed9e9b6 CC |
589 | /* |
590 | * Check dropped voltage of battery. If battery voltage is more | |
591 | * dropped than fullbatt_vchkdrop_uV after fully charged state, | |
592 | * charger-manager have to recharge battery. | |
593 | */ | |
594 | } else if (!cm->emergency_stop && is_ext_pwr_online(cm) && | |
595 | !cm->charger_enabled) { | |
596 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
597 | ||
598 | /* | |
599 | * Check whether fully charged state to protect overcharge | |
600 | * if charger-manager is charging for battery. | |
601 | */ | |
602 | } else if (!cm->emergency_stop && is_full_charged(cm) && | |
603 | cm->charger_enabled) { | |
604 | dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged.\n"); | |
605 | uevent_notify(cm, default_event_names[CM_EVENT_BATT_FULL]); | |
606 | ||
607 | try_charger_enable(cm, false); | |
608 | ||
609 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
3bb3dbbd DK |
610 | } else { |
611 | cm->emergency_stop = 0; | |
2ed9e9b6 CC |
612 | if (is_ext_pwr_online(cm)) { |
613 | if (!try_charger_enable(cm, true)) | |
614 | uevent_notify(cm, "CHARGING"); | |
615 | } | |
3bb3dbbd DK |
616 | } |
617 | ||
618 | return true; | |
619 | } | |
620 | ||
621 | /** | |
622 | * cm_monitor - Monitor every battery. | |
623 | * | |
624 | * Returns true if there is an event to notify from any of the batteries. | |
625 | * (True if the status of "emergency_stop" changes) | |
626 | */ | |
627 | static bool cm_monitor(void) | |
628 | { | |
629 | bool stop = false; | |
630 | struct charger_manager *cm; | |
631 | ||
632 | mutex_lock(&cm_list_mtx); | |
633 | ||
bb2a95c2 AL |
634 | list_for_each_entry(cm, &cm_list, entry) { |
635 | if (_cm_monitor(cm)) | |
636 | stop = true; | |
637 | } | |
3bb3dbbd DK |
638 | |
639 | mutex_unlock(&cm_list_mtx); | |
640 | ||
641 | return stop; | |
642 | } | |
643 | ||
d829dc75 CC |
644 | /** |
645 | * _setup_polling - Setup the next instance of polling. | |
646 | * @work: work_struct of the function _setup_polling. | |
647 | */ | |
648 | static void _setup_polling(struct work_struct *work) | |
649 | { | |
650 | unsigned long min = ULONG_MAX; | |
651 | struct charger_manager *cm; | |
652 | bool keep_polling = false; | |
653 | unsigned long _next_polling; | |
654 | ||
655 | mutex_lock(&cm_list_mtx); | |
656 | ||
657 | list_for_each_entry(cm, &cm_list, entry) { | |
658 | if (is_polling_required(cm) && cm->desc->polling_interval_ms) { | |
659 | keep_polling = true; | |
660 | ||
661 | if (min > cm->desc->polling_interval_ms) | |
662 | min = cm->desc->polling_interval_ms; | |
663 | } | |
664 | } | |
665 | ||
666 | polling_jiffy = msecs_to_jiffies(min); | |
667 | if (polling_jiffy <= CM_JIFFIES_SMALL) | |
668 | polling_jiffy = CM_JIFFIES_SMALL + 1; | |
669 | ||
670 | if (!keep_polling) | |
671 | polling_jiffy = ULONG_MAX; | |
672 | if (polling_jiffy == ULONG_MAX) | |
673 | goto out; | |
674 | ||
675 | WARN(cm_wq == NULL, "charger-manager: workqueue not initialized" | |
676 | ". try it later. %s\n", __func__); | |
677 | ||
678 | _next_polling = jiffies + polling_jiffy; | |
679 | ||
680 | if (!delayed_work_pending(&cm_monitor_work) || | |
681 | (delayed_work_pending(&cm_monitor_work) && | |
682 | time_after(next_polling, _next_polling))) { | |
d829dc75 | 683 | next_polling = jiffies + polling_jiffy; |
41f63c53 | 684 | mod_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy); |
d829dc75 CC |
685 | } |
686 | ||
687 | out: | |
688 | mutex_unlock(&cm_list_mtx); | |
689 | } | |
690 | static DECLARE_WORK(setup_polling, _setup_polling); | |
691 | ||
692 | /** | |
693 | * cm_monitor_poller - The Monitor / Poller. | |
694 | * @work: work_struct of the function cm_monitor_poller | |
695 | * | |
696 | * During non-suspended state, cm_monitor_poller is used to poll and monitor | |
697 | * the batteries. | |
698 | */ | |
699 | static void cm_monitor_poller(struct work_struct *work) | |
700 | { | |
701 | cm_monitor(); | |
702 | schedule_work(&setup_polling); | |
703 | } | |
704 | ||
dfeccb12 CC |
705 | /** |
706 | * fullbatt_handler - Event handler for CM_EVENT_BATT_FULL | |
707 | * @cm: the Charger Manager representing the battery. | |
708 | */ | |
709 | static void fullbatt_handler(struct charger_manager *cm) | |
710 | { | |
711 | struct charger_desc *desc = cm->desc; | |
712 | ||
713 | if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms) | |
714 | goto out; | |
715 | ||
716 | if (cm_suspended) | |
717 | device_set_wakeup_capable(cm->dev, true); | |
718 | ||
41f63c53 TH |
719 | mod_delayed_work(cm_wq, &cm->fullbatt_vchk_work, |
720 | msecs_to_jiffies(desc->fullbatt_vchkdrop_ms)); | |
dfeccb12 CC |
721 | cm->fullbatt_vchk_jiffies_at = jiffies + msecs_to_jiffies( |
722 | desc->fullbatt_vchkdrop_ms); | |
723 | ||
724 | if (cm->fullbatt_vchk_jiffies_at == 0) | |
725 | cm->fullbatt_vchk_jiffies_at = 1; | |
726 | ||
727 | out: | |
728 | dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged.\n"); | |
729 | uevent_notify(cm, default_event_names[CM_EVENT_BATT_FULL]); | |
730 | } | |
731 | ||
732 | /** | |
733 | * battout_handler - Event handler for CM_EVENT_BATT_OUT | |
734 | * @cm: the Charger Manager representing the battery. | |
735 | */ | |
736 | static void battout_handler(struct charger_manager *cm) | |
737 | { | |
738 | if (cm_suspended) | |
739 | device_set_wakeup_capable(cm->dev, true); | |
740 | ||
741 | if (!is_batt_present(cm)) { | |
742 | dev_emerg(cm->dev, "Battery Pulled Out!\n"); | |
743 | uevent_notify(cm, default_event_names[CM_EVENT_BATT_OUT]); | |
744 | } else { | |
745 | uevent_notify(cm, "Battery Reinserted?"); | |
746 | } | |
747 | } | |
748 | ||
749 | /** | |
750 | * misc_event_handler - Handler for other evnets | |
751 | * @cm: the Charger Manager representing the battery. | |
752 | * @type: the Charger Manager representing the battery. | |
753 | */ | |
754 | static void misc_event_handler(struct charger_manager *cm, | |
755 | enum cm_event_types type) | |
756 | { | |
757 | if (cm_suspended) | |
758 | device_set_wakeup_capable(cm->dev, true); | |
759 | ||
760 | if (!delayed_work_pending(&cm_monitor_work) && | |
761 | is_polling_required(cm) && cm->desc->polling_interval_ms) | |
762 | schedule_work(&setup_polling); | |
763 | uevent_notify(cm, default_event_names[type]); | |
764 | } | |
765 | ||
ad3d13ee DK |
766 | static int charger_get_property(struct power_supply *psy, |
767 | enum power_supply_property psp, | |
768 | union power_supply_propval *val) | |
769 | { | |
770 | struct charger_manager *cm = container_of(psy, | |
771 | struct charger_manager, charger_psy); | |
772 | struct charger_desc *desc = cm->desc; | |
df58c04c AV |
773 | int ret = 0; |
774 | int uV; | |
ad3d13ee DK |
775 | |
776 | switch (psp) { | |
777 | case POWER_SUPPLY_PROP_STATUS: | |
778 | if (is_charging(cm)) | |
779 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
780 | else if (is_ext_pwr_online(cm)) | |
781 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
782 | else | |
783 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
784 | break; | |
785 | case POWER_SUPPLY_PROP_HEALTH: | |
786 | if (cm->emergency_stop > 0) | |
787 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
788 | else if (cm->emergency_stop < 0) | |
789 | val->intval = POWER_SUPPLY_HEALTH_COLD; | |
790 | else | |
791 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
792 | break; | |
793 | case POWER_SUPPLY_PROP_PRESENT: | |
794 | if (is_batt_present(cm)) | |
795 | val->intval = 1; | |
796 | else | |
797 | val->intval = 0; | |
798 | break; | |
799 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
df58c04c | 800 | ret = get_batt_uV(cm, &val->intval); |
ad3d13ee DK |
801 | break; |
802 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
803 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
804 | POWER_SUPPLY_PROP_CURRENT_NOW, val); | |
805 | break; | |
806 | case POWER_SUPPLY_PROP_TEMP: | |
807 | /* in thenth of centigrade */ | |
808 | if (cm->last_temp_mC == INT_MIN) | |
809 | desc->temperature_out_of_range(&cm->last_temp_mC); | |
810 | val->intval = cm->last_temp_mC / 100; | |
811 | if (!desc->measure_battery_temp) | |
812 | ret = -ENODEV; | |
813 | break; | |
814 | case POWER_SUPPLY_PROP_TEMP_AMBIENT: | |
815 | /* in thenth of centigrade */ | |
816 | if (cm->last_temp_mC == INT_MIN) | |
817 | desc->temperature_out_of_range(&cm->last_temp_mC); | |
818 | val->intval = cm->last_temp_mC / 100; | |
819 | if (desc->measure_battery_temp) | |
820 | ret = -ENODEV; | |
821 | break; | |
822 | case POWER_SUPPLY_PROP_CAPACITY: | |
823 | if (!cm->fuel_gauge) { | |
824 | ret = -ENODEV; | |
825 | break; | |
826 | } | |
827 | ||
828 | if (!is_batt_present(cm)) { | |
829 | /* There is no battery. Assume 100% */ | |
830 | val->intval = 100; | |
831 | break; | |
832 | } | |
833 | ||
834 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
835 | POWER_SUPPLY_PROP_CAPACITY, val); | |
836 | if (ret) | |
837 | break; | |
838 | ||
839 | if (val->intval > 100) { | |
840 | val->intval = 100; | |
841 | break; | |
842 | } | |
843 | if (val->intval < 0) | |
844 | val->intval = 0; | |
845 | ||
846 | /* Do not adjust SOC when charging: voltage is overrated */ | |
847 | if (is_charging(cm)) | |
848 | break; | |
849 | ||
850 | /* | |
851 | * If the capacity value is inconsistent, calibrate it base on | |
852 | * the battery voltage values and the thresholds given as desc | |
853 | */ | |
854 | ret = get_batt_uV(cm, &uV); | |
855 | if (ret) { | |
856 | /* Voltage information not available. No calibration */ | |
857 | ret = 0; | |
858 | break; | |
859 | } | |
860 | ||
861 | if (desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV && | |
862 | !is_charging(cm)) { | |
863 | val->intval = 100; | |
864 | break; | |
865 | } | |
866 | ||
867 | break; | |
868 | case POWER_SUPPLY_PROP_ONLINE: | |
869 | if (is_ext_pwr_online(cm)) | |
870 | val->intval = 1; | |
871 | else | |
872 | val->intval = 0; | |
873 | break; | |
874 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
2ed9e9b6 | 875 | if (is_full_charged(cm)) |
ad3d13ee | 876 | val->intval = 1; |
2ed9e9b6 CC |
877 | else |
878 | val->intval = 0; | |
ad3d13ee DK |
879 | ret = 0; |
880 | break; | |
881 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
882 | if (is_charging(cm)) { | |
883 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
884 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
885 | val); | |
886 | if (ret) { | |
887 | val->intval = 1; | |
888 | ret = 0; | |
889 | } else { | |
890 | /* If CHARGE_NOW is supplied, use it */ | |
891 | val->intval = (val->intval > 0) ? | |
892 | val->intval : 1; | |
893 | } | |
894 | } else { | |
895 | val->intval = 0; | |
896 | } | |
897 | break; | |
898 | default: | |
899 | return -EINVAL; | |
900 | } | |
901 | return ret; | |
902 | } | |
903 | ||
904 | #define NUM_CHARGER_PSY_OPTIONAL (4) | |
905 | static enum power_supply_property default_charger_props[] = { | |
906 | /* Guaranteed to provide */ | |
907 | POWER_SUPPLY_PROP_STATUS, | |
908 | POWER_SUPPLY_PROP_HEALTH, | |
909 | POWER_SUPPLY_PROP_PRESENT, | |
910 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
911 | POWER_SUPPLY_PROP_CAPACITY, | |
912 | POWER_SUPPLY_PROP_ONLINE, | |
913 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
914 | /* | |
915 | * Optional properties are: | |
916 | * POWER_SUPPLY_PROP_CHARGE_NOW, | |
917 | * POWER_SUPPLY_PROP_CURRENT_NOW, | |
918 | * POWER_SUPPLY_PROP_TEMP, and | |
919 | * POWER_SUPPLY_PROP_TEMP_AMBIENT, | |
920 | */ | |
921 | }; | |
922 | ||
923 | static struct power_supply psy_default = { | |
924 | .name = "battery", | |
925 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
926 | .properties = default_charger_props, | |
927 | .num_properties = ARRAY_SIZE(default_charger_props), | |
928 | .get_property = charger_get_property, | |
929 | }; | |
930 | ||
3bb3dbbd DK |
931 | /** |
932 | * cm_setup_timer - For in-suspend monitoring setup wakeup alarm | |
933 | * for suspend_again. | |
934 | * | |
935 | * Returns true if the alarm is set for Charger Manager to use. | |
936 | * Returns false if | |
937 | * cm_setup_timer fails to set an alarm, | |
938 | * cm_setup_timer does not need to set an alarm for Charger Manager, | |
939 | * or an alarm previously configured is to be used. | |
940 | */ | |
941 | static bool cm_setup_timer(void) | |
942 | { | |
943 | struct charger_manager *cm; | |
944 | unsigned int wakeup_ms = UINT_MAX; | |
945 | bool ret = false; | |
946 | ||
947 | mutex_lock(&cm_list_mtx); | |
948 | ||
949 | list_for_each_entry(cm, &cm_list, entry) { | |
d829dc75 CC |
950 | unsigned int fbchk_ms = 0; |
951 | ||
952 | /* fullbatt_vchk is required. setup timer for that */ | |
953 | if (cm->fullbatt_vchk_jiffies_at) { | |
954 | fbchk_ms = jiffies_to_msecs(cm->fullbatt_vchk_jiffies_at | |
955 | - jiffies); | |
956 | if (time_is_before_eq_jiffies( | |
957 | cm->fullbatt_vchk_jiffies_at) || | |
958 | msecs_to_jiffies(fbchk_ms) < CM_JIFFIES_SMALL) { | |
959 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
960 | fbchk_ms = 0; | |
961 | } | |
962 | } | |
963 | CM_MIN_VALID(wakeup_ms, fbchk_ms); | |
964 | ||
3bb3dbbd DK |
965 | /* Skip if polling is not required for this CM */ |
966 | if (!is_polling_required(cm) && !cm->emergency_stop) | |
967 | continue; | |
968 | if (cm->desc->polling_interval_ms == 0) | |
969 | continue; | |
970 | CM_MIN_VALID(wakeup_ms, cm->desc->polling_interval_ms); | |
971 | } | |
972 | ||
973 | mutex_unlock(&cm_list_mtx); | |
974 | ||
975 | if (wakeup_ms < UINT_MAX && wakeup_ms > 0) { | |
976 | pr_info("Charger Manager wakeup timer: %u ms.\n", wakeup_ms); | |
977 | if (rtc_dev) { | |
978 | struct rtc_wkalrm tmp; | |
979 | unsigned long time, now; | |
980 | unsigned long add = DIV_ROUND_UP(wakeup_ms, 1000); | |
981 | ||
982 | /* | |
983 | * Set alarm with the polling interval (wakeup_ms) | |
984 | * except when rtc_wkalarm_save comes first. | |
985 | * However, the alarm time should be NOW + | |
986 | * CM_RTC_SMALL or later. | |
987 | */ | |
988 | tmp.enabled = 1; | |
989 | rtc_read_time(rtc_dev, &tmp.time); | |
990 | rtc_tm_to_time(&tmp.time, &now); | |
991 | if (add < CM_RTC_SMALL) | |
992 | add = CM_RTC_SMALL; | |
993 | time = now + add; | |
994 | ||
995 | ret = true; | |
996 | ||
997 | if (rtc_wkalarm_save.enabled && | |
998 | rtc_wkalarm_save_time && | |
999 | rtc_wkalarm_save_time < time) { | |
1000 | if (rtc_wkalarm_save_time < now + CM_RTC_SMALL) | |
1001 | time = now + CM_RTC_SMALL; | |
1002 | else | |
1003 | time = rtc_wkalarm_save_time; | |
1004 | ||
1005 | /* The timer is not appointed by CM */ | |
1006 | ret = false; | |
1007 | } | |
1008 | ||
1009 | pr_info("Waking up after %lu secs.\n", | |
1010 | time - now); | |
1011 | ||
1012 | rtc_time_to_tm(time, &tmp.time); | |
1013 | rtc_set_alarm(rtc_dev, &tmp); | |
1014 | cm_suspend_duration_ms += wakeup_ms; | |
1015 | return ret; | |
1016 | } | |
1017 | } | |
1018 | ||
1019 | if (rtc_dev) | |
1020 | rtc_set_alarm(rtc_dev, &rtc_wkalarm_save); | |
1021 | return false; | |
1022 | } | |
1023 | ||
d829dc75 CC |
1024 | static void _cm_fbchk_in_suspend(struct charger_manager *cm) |
1025 | { | |
1026 | unsigned long jiffy_now = jiffies; | |
1027 | ||
1028 | if (!cm->fullbatt_vchk_jiffies_at) | |
1029 | return; | |
1030 | ||
1031 | if (g_desc && g_desc->assume_timer_stops_in_suspend) | |
1032 | jiffy_now += msecs_to_jiffies(cm_suspend_duration_ms); | |
1033 | ||
1034 | /* Execute now if it's going to be executed not too long after */ | |
1035 | jiffy_now += CM_JIFFIES_SMALL; | |
1036 | ||
1037 | if (time_after_eq(jiffy_now, cm->fullbatt_vchk_jiffies_at)) | |
1038 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
1039 | } | |
1040 | ||
3bb3dbbd DK |
1041 | /** |
1042 | * cm_suspend_again - Determine whether suspend again or not | |
1043 | * | |
1044 | * Returns true if the system should be suspended again | |
1045 | * Returns false if the system should be woken up | |
1046 | */ | |
1047 | bool cm_suspend_again(void) | |
1048 | { | |
1049 | struct charger_manager *cm; | |
1050 | bool ret = false; | |
1051 | ||
1052 | if (!g_desc || !g_desc->rtc_only_wakeup || !g_desc->rtc_only_wakeup() || | |
1053 | !cm_rtc_set) | |
1054 | return false; | |
1055 | ||
1056 | if (cm_monitor()) | |
1057 | goto out; | |
1058 | ||
1059 | ret = true; | |
1060 | mutex_lock(&cm_list_mtx); | |
1061 | list_for_each_entry(cm, &cm_list, entry) { | |
d829dc75 CC |
1062 | _cm_fbchk_in_suspend(cm); |
1063 | ||
3bb3dbbd | 1064 | if (cm->status_save_ext_pwr_inserted != is_ext_pwr_online(cm) || |
bb2a95c2 | 1065 | cm->status_save_batt != is_batt_present(cm)) { |
3bb3dbbd | 1066 | ret = false; |
bb2a95c2 AL |
1067 | break; |
1068 | } | |
3bb3dbbd DK |
1069 | } |
1070 | mutex_unlock(&cm_list_mtx); | |
1071 | ||
1072 | cm_rtc_set = cm_setup_timer(); | |
1073 | out: | |
1074 | /* It's about the time when the non-CM appointed timer goes off */ | |
1075 | if (rtc_wkalarm_save.enabled) { | |
1076 | unsigned long now; | |
1077 | struct rtc_time tmp; | |
1078 | ||
1079 | rtc_read_time(rtc_dev, &tmp); | |
1080 | rtc_tm_to_time(&tmp, &now); | |
1081 | ||
1082 | if (rtc_wkalarm_save_time && | |
1083 | now + CM_RTC_SMALL >= rtc_wkalarm_save_time) | |
1084 | return false; | |
1085 | } | |
1086 | return ret; | |
1087 | } | |
1088 | EXPORT_SYMBOL_GPL(cm_suspend_again); | |
1089 | ||
1090 | /** | |
1091 | * setup_charger_manager - initialize charger_global_desc data | |
1092 | * @gd: pointer to instance of charger_global_desc | |
1093 | */ | |
1094 | int setup_charger_manager(struct charger_global_desc *gd) | |
1095 | { | |
1096 | if (!gd) | |
1097 | return -EINVAL; | |
1098 | ||
1099 | if (rtc_dev) | |
1100 | rtc_class_close(rtc_dev); | |
1101 | rtc_dev = NULL; | |
1102 | g_desc = NULL; | |
1103 | ||
1104 | if (!gd->rtc_only_wakeup) { | |
1105 | pr_err("The callback rtc_only_wakeup is not given.\n"); | |
1106 | return -EINVAL; | |
1107 | } | |
1108 | ||
1109 | if (gd->rtc_name) { | |
1110 | rtc_dev = rtc_class_open(gd->rtc_name); | |
1111 | if (IS_ERR_OR_NULL(rtc_dev)) { | |
1112 | rtc_dev = NULL; | |
1113 | /* Retry at probe. RTC may be not registered yet */ | |
1114 | } | |
1115 | } else { | |
1116 | pr_warn("No wakeup timer is given for charger manager." | |
1117 | "In-suspend monitoring won't work.\n"); | |
1118 | } | |
1119 | ||
1120 | g_desc = gd; | |
1121 | return 0; | |
1122 | } | |
1123 | EXPORT_SYMBOL_GPL(setup_charger_manager); | |
1124 | ||
bee737bc CC |
1125 | /** |
1126 | * charger_extcon_work - enable/diable charger according to the state | |
1127 | * of charger cable | |
1128 | * | |
1129 | * @work: work_struct of the function charger_extcon_work. | |
1130 | */ | |
1131 | static void charger_extcon_work(struct work_struct *work) | |
1132 | { | |
1133 | struct charger_cable *cable = | |
1134 | container_of(work, struct charger_cable, wq); | |
45cd4fb2 CC |
1135 | int ret; |
1136 | ||
1137 | if (cable->attached && cable->min_uA != 0 && cable->max_uA != 0) { | |
1138 | ret = regulator_set_current_limit(cable->charger->consumer, | |
1139 | cable->min_uA, cable->max_uA); | |
1140 | if (ret < 0) { | |
1141 | pr_err("Cannot set current limit of %s (%s)\n", | |
1142 | cable->charger->regulator_name, cable->name); | |
1143 | return; | |
1144 | } | |
1145 | ||
1146 | pr_info("Set current limit of %s : %duA ~ %duA\n", | |
1147 | cable->charger->regulator_name, | |
1148 | cable->min_uA, cable->max_uA); | |
1149 | } | |
bee737bc CC |
1150 | |
1151 | try_charger_enable(cable->cm, cable->attached); | |
1152 | } | |
1153 | ||
1154 | /** | |
1155 | * charger_extcon_notifier - receive the state of charger cable | |
1156 | * when registered cable is attached or detached. | |
1157 | * | |
1158 | * @self: the notifier block of the charger_extcon_notifier. | |
1159 | * @event: the cable state. | |
1160 | * @ptr: the data pointer of notifier block. | |
1161 | */ | |
1162 | static int charger_extcon_notifier(struct notifier_block *self, | |
1163 | unsigned long event, void *ptr) | |
1164 | { | |
1165 | struct charger_cable *cable = | |
1166 | container_of(self, struct charger_cable, nb); | |
1167 | ||
2ed9e9b6 CC |
1168 | /* |
1169 | * The newly state of charger cable. | |
1170 | * If cable is attached, cable->attached is true. | |
1171 | */ | |
bee737bc | 1172 | cable->attached = event; |
2ed9e9b6 CC |
1173 | |
1174 | /* | |
1175 | * Setup monitoring to check battery state | |
1176 | * when charger cable is attached. | |
1177 | */ | |
1178 | if (cable->attached && is_polling_required(cable->cm)) { | |
1179 | if (work_pending(&setup_polling)) | |
1180 | cancel_work_sync(&setup_polling); | |
1181 | schedule_work(&setup_polling); | |
1182 | } | |
1183 | ||
1184 | /* | |
1185 | * Setup work for controlling charger(regulator) | |
1186 | * according to charger cable. | |
1187 | */ | |
bee737bc CC |
1188 | schedule_work(&cable->wq); |
1189 | ||
1190 | return NOTIFY_DONE; | |
1191 | } | |
1192 | ||
1193 | /** | |
1194 | * charger_extcon_init - register external connector to use it | |
1195 | * as the charger cable | |
1196 | * | |
1197 | * @cm: the Charger Manager representing the battery. | |
1198 | * @cable: the Charger cable representing the external connector. | |
1199 | */ | |
1200 | static int charger_extcon_init(struct charger_manager *cm, | |
1201 | struct charger_cable *cable) | |
1202 | { | |
1203 | int ret = 0; | |
1204 | ||
1205 | /* | |
1206 | * Charger manager use Extcon framework to identify | |
1207 | * the charger cable among various external connector | |
1208 | * cable (e.g., TA, USB, MHL, Dock). | |
1209 | */ | |
1210 | INIT_WORK(&cable->wq, charger_extcon_work); | |
1211 | cable->nb.notifier_call = charger_extcon_notifier; | |
1212 | ret = extcon_register_interest(&cable->extcon_dev, | |
1213 | cable->extcon_name, cable->name, &cable->nb); | |
1214 | if (ret < 0) { | |
1215 | pr_info("Cannot register extcon_dev for %s(cable: %s).\n", | |
1216 | cable->extcon_name, | |
1217 | cable->name); | |
1218 | ret = -EINVAL; | |
1219 | } | |
1220 | ||
1221 | return ret; | |
1222 | } | |
1223 | ||
3950c786 CC |
1224 | /* help function of sysfs node to control charger(regulator) */ |
1225 | static ssize_t charger_name_show(struct device *dev, | |
1226 | struct device_attribute *attr, char *buf) | |
1227 | { | |
1228 | struct charger_regulator *charger | |
1229 | = container_of(attr, struct charger_regulator, attr_name); | |
1230 | ||
1231 | return sprintf(buf, "%s\n", charger->regulator_name); | |
1232 | } | |
1233 | ||
1234 | static ssize_t charger_state_show(struct device *dev, | |
1235 | struct device_attribute *attr, char *buf) | |
1236 | { | |
1237 | struct charger_regulator *charger | |
1238 | = container_of(attr, struct charger_regulator, attr_state); | |
1239 | int state = 0; | |
1240 | ||
1241 | if (!charger->externally_control) | |
1242 | state = regulator_is_enabled(charger->consumer); | |
1243 | ||
1244 | return sprintf(buf, "%s\n", state ? "enabled" : "disabled"); | |
1245 | } | |
1246 | ||
1247 | static ssize_t charger_externally_control_show(struct device *dev, | |
1248 | struct device_attribute *attr, char *buf) | |
1249 | { | |
1250 | struct charger_regulator *charger = container_of(attr, | |
1251 | struct charger_regulator, attr_externally_control); | |
1252 | ||
1253 | return sprintf(buf, "%d\n", charger->externally_control); | |
1254 | } | |
1255 | ||
1256 | static ssize_t charger_externally_control_store(struct device *dev, | |
1257 | struct device_attribute *attr, const char *buf, | |
1258 | size_t count) | |
1259 | { | |
1260 | struct charger_regulator *charger | |
1261 | = container_of(attr, struct charger_regulator, | |
1262 | attr_externally_control); | |
1263 | struct charger_manager *cm = charger->cm; | |
1264 | struct charger_desc *desc = cm->desc; | |
1265 | int i; | |
1266 | int ret; | |
1267 | int externally_control; | |
1268 | int chargers_externally_control = 1; | |
1269 | ||
1270 | ret = sscanf(buf, "%d", &externally_control); | |
1271 | if (ret == 0) { | |
1272 | ret = -EINVAL; | |
1273 | return ret; | |
1274 | } | |
1275 | ||
1276 | if (!externally_control) { | |
1277 | charger->externally_control = 0; | |
1278 | return count; | |
1279 | } | |
1280 | ||
1281 | for (i = 0; i < desc->num_charger_regulators; i++) { | |
1282 | if (&desc->charger_regulators[i] != charger && | |
1283 | !desc->charger_regulators[i].externally_control) { | |
1284 | /* | |
1285 | * At least, one charger is controlled by | |
1286 | * charger-manager | |
1287 | */ | |
1288 | chargers_externally_control = 0; | |
1289 | break; | |
1290 | } | |
1291 | } | |
1292 | ||
1293 | if (!chargers_externally_control) { | |
1294 | if (cm->charger_enabled) { | |
1295 | try_charger_enable(charger->cm, false); | |
1296 | charger->externally_control = externally_control; | |
1297 | try_charger_enable(charger->cm, true); | |
1298 | } else { | |
1299 | charger->externally_control = externally_control; | |
1300 | } | |
1301 | } else { | |
1302 | dev_warn(cm->dev, | |
1303 | "'%s' regulator should be controlled " | |
1304 | "in charger-manager because charger-manager " | |
1305 | "must need at least one charger for charging\n", | |
1306 | charger->regulator_name); | |
1307 | } | |
1308 | ||
1309 | return count; | |
1310 | } | |
1311 | ||
3bb3dbbd DK |
1312 | static int charger_manager_probe(struct platform_device *pdev) |
1313 | { | |
1314 | struct charger_desc *desc = dev_get_platdata(&pdev->dev); | |
1315 | struct charger_manager *cm; | |
1316 | int ret = 0, i = 0; | |
bee737bc | 1317 | int j = 0; |
3950c786 | 1318 | int chargers_externally_control = 1; |
ad3d13ee | 1319 | union power_supply_propval val; |
3bb3dbbd DK |
1320 | |
1321 | if (g_desc && !rtc_dev && g_desc->rtc_name) { | |
1322 | rtc_dev = rtc_class_open(g_desc->rtc_name); | |
1323 | if (IS_ERR_OR_NULL(rtc_dev)) { | |
1324 | rtc_dev = NULL; | |
1325 | dev_err(&pdev->dev, "Cannot get RTC %s.\n", | |
1326 | g_desc->rtc_name); | |
1327 | ret = -ENODEV; | |
1328 | goto err_alloc; | |
1329 | } | |
1330 | } | |
1331 | ||
1332 | if (!desc) { | |
1333 | dev_err(&pdev->dev, "No platform data (desc) found.\n"); | |
1334 | ret = -ENODEV; | |
1335 | goto err_alloc; | |
1336 | } | |
1337 | ||
1338 | cm = kzalloc(sizeof(struct charger_manager), GFP_KERNEL); | |
1339 | if (!cm) { | |
1340 | dev_err(&pdev->dev, "Cannot allocate memory.\n"); | |
1341 | ret = -ENOMEM; | |
1342 | goto err_alloc; | |
1343 | } | |
1344 | ||
1345 | /* Basic Values. Unspecified are Null or 0 */ | |
1346 | cm->dev = &pdev->dev; | |
1347 | cm->desc = kzalloc(sizeof(struct charger_desc), GFP_KERNEL); | |
1348 | if (!cm->desc) { | |
1349 | dev_err(&pdev->dev, "Cannot allocate memory.\n"); | |
1350 | ret = -ENOMEM; | |
1351 | goto err_alloc_desc; | |
1352 | } | |
1353 | memcpy(cm->desc, desc, sizeof(struct charger_desc)); | |
1354 | cm->last_temp_mC = INT_MIN; /* denotes "unmeasured, yet" */ | |
1355 | ||
d829dc75 CC |
1356 | /* |
1357 | * The following two do not need to be errors. | |
1358 | * Users may intentionally ignore those two features. | |
1359 | */ | |
1360 | if (desc->fullbatt_uV == 0) { | |
1361 | dev_info(&pdev->dev, "Ignoring full-battery voltage threshold" | |
1362 | " as it is not supplied."); | |
1363 | } | |
1364 | if (!desc->fullbatt_vchkdrop_ms || !desc->fullbatt_vchkdrop_uV) { | |
1365 | dev_info(&pdev->dev, "Disabling full-battery voltage drop " | |
1366 | "checking mechanism as it is not supplied."); | |
1367 | desc->fullbatt_vchkdrop_ms = 0; | |
1368 | desc->fullbatt_vchkdrop_uV = 0; | |
1369 | } | |
2ed9e9b6 CC |
1370 | if (desc->fullbatt_soc == 0) { |
1371 | dev_info(&pdev->dev, "Ignoring full-battery soc(state of" | |
1372 | " charge) threshold as it is not" | |
1373 | " supplied."); | |
1374 | } | |
1375 | if (desc->fullbatt_full_capacity == 0) { | |
1376 | dev_info(&pdev->dev, "Ignoring full-battery full capacity" | |
1377 | " threshold as it is not supplied."); | |
1378 | } | |
d829dc75 | 1379 | |
3bb3dbbd DK |
1380 | if (!desc->charger_regulators || desc->num_charger_regulators < 1) { |
1381 | ret = -EINVAL; | |
1382 | dev_err(&pdev->dev, "charger_regulators undefined.\n"); | |
1383 | goto err_no_charger; | |
1384 | } | |
1385 | ||
1386 | if (!desc->psy_charger_stat || !desc->psy_charger_stat[0]) { | |
1387 | dev_err(&pdev->dev, "No power supply defined.\n"); | |
1388 | ret = -EINVAL; | |
1389 | goto err_no_charger_stat; | |
1390 | } | |
1391 | ||
1392 | /* Counting index only */ | |
1393 | while (desc->psy_charger_stat[i]) | |
1394 | i++; | |
1395 | ||
1396 | cm->charger_stat = kzalloc(sizeof(struct power_supply *) * (i + 1), | |
1397 | GFP_KERNEL); | |
1398 | if (!cm->charger_stat) { | |
1399 | ret = -ENOMEM; | |
1400 | goto err_no_charger_stat; | |
1401 | } | |
1402 | ||
1403 | for (i = 0; desc->psy_charger_stat[i]; i++) { | |
1404 | cm->charger_stat[i] = power_supply_get_by_name( | |
1405 | desc->psy_charger_stat[i]); | |
1406 | if (!cm->charger_stat[i]) { | |
1407 | dev_err(&pdev->dev, "Cannot find power supply " | |
1408 | "\"%s\"\n", | |
1409 | desc->psy_charger_stat[i]); | |
1410 | ret = -ENODEV; | |
1411 | goto err_chg_stat; | |
1412 | } | |
1413 | } | |
1414 | ||
1415 | cm->fuel_gauge = power_supply_get_by_name(desc->psy_fuel_gauge); | |
1416 | if (!cm->fuel_gauge) { | |
1417 | dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n", | |
1418 | desc->psy_fuel_gauge); | |
1419 | ret = -ENODEV; | |
1420 | goto err_chg_stat; | |
1421 | } | |
1422 | ||
1423 | if (desc->polling_interval_ms == 0 || | |
1424 | msecs_to_jiffies(desc->polling_interval_ms) <= CM_JIFFIES_SMALL) { | |
1425 | dev_err(&pdev->dev, "polling_interval_ms is too small\n"); | |
1426 | ret = -EINVAL; | |
1427 | goto err_chg_stat; | |
1428 | } | |
1429 | ||
1430 | if (!desc->temperature_out_of_range) { | |
1431 | dev_err(&pdev->dev, "there is no temperature_out_of_range\n"); | |
1432 | ret = -EINVAL; | |
1433 | goto err_chg_stat; | |
1434 | } | |
1435 | ||
8fcfe088 CC |
1436 | if (!desc->charging_max_duration_ms || |
1437 | !desc->discharging_max_duration_ms) { | |
1438 | dev_info(&pdev->dev, "Cannot limit charging duration " | |
1439 | "checking mechanism to prevent overcharge/overheat " | |
1440 | "and control discharging duration"); | |
1441 | desc->charging_max_duration_ms = 0; | |
1442 | desc->discharging_max_duration_ms = 0; | |
1443 | } | |
1444 | ||
3bb3dbbd DK |
1445 | platform_set_drvdata(pdev, cm); |
1446 | ||
bb2a95c2 AL |
1447 | memcpy(&cm->charger_psy, &psy_default, sizeof(psy_default)); |
1448 | ||
ad3d13ee | 1449 | if (!desc->psy_name) { |
bb2a95c2 | 1450 | strncpy(cm->psy_name_buf, psy_default.name, PSY_NAME_MAX); |
ad3d13ee DK |
1451 | } else { |
1452 | strncpy(cm->psy_name_buf, desc->psy_name, PSY_NAME_MAX); | |
1453 | } | |
1454 | cm->charger_psy.name = cm->psy_name_buf; | |
1455 | ||
1456 | /* Allocate for psy properties because they may vary */ | |
1457 | cm->charger_psy.properties = kzalloc(sizeof(enum power_supply_property) | |
1458 | * (ARRAY_SIZE(default_charger_props) + | |
1459 | NUM_CHARGER_PSY_OPTIONAL), | |
1460 | GFP_KERNEL); | |
1461 | if (!cm->charger_psy.properties) { | |
1462 | dev_err(&pdev->dev, "Cannot allocate for psy properties.\n"); | |
1463 | ret = -ENOMEM; | |
1464 | goto err_chg_stat; | |
1465 | } | |
1466 | memcpy(cm->charger_psy.properties, default_charger_props, | |
1467 | sizeof(enum power_supply_property) * | |
1468 | ARRAY_SIZE(default_charger_props)); | |
1469 | cm->charger_psy.num_properties = psy_default.num_properties; | |
1470 | ||
1471 | /* Find which optional psy-properties are available */ | |
1472 | if (!cm->fuel_gauge->get_property(cm->fuel_gauge, | |
1473 | POWER_SUPPLY_PROP_CHARGE_NOW, &val)) { | |
1474 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1475 | POWER_SUPPLY_PROP_CHARGE_NOW; | |
1476 | cm->charger_psy.num_properties++; | |
1477 | } | |
1478 | if (!cm->fuel_gauge->get_property(cm->fuel_gauge, | |
1479 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
1480 | &val)) { | |
1481 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1482 | POWER_SUPPLY_PROP_CURRENT_NOW; | |
1483 | cm->charger_psy.num_properties++; | |
1484 | } | |
bb2a95c2 | 1485 | |
ad3d13ee DK |
1486 | if (desc->measure_battery_temp) { |
1487 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1488 | POWER_SUPPLY_PROP_TEMP; | |
1489 | cm->charger_psy.num_properties++; | |
bb2a95c2 AL |
1490 | } else { |
1491 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1492 | POWER_SUPPLY_PROP_TEMP_AMBIENT; | |
1493 | cm->charger_psy.num_properties++; | |
ad3d13ee DK |
1494 | } |
1495 | ||
d829dc75 CC |
1496 | INIT_DELAYED_WORK(&cm->fullbatt_vchk_work, fullbatt_vchk); |
1497 | ||
ad3d13ee DK |
1498 | ret = power_supply_register(NULL, &cm->charger_psy); |
1499 | if (ret) { | |
1500 | dev_err(&pdev->dev, "Cannot register charger-manager with" | |
1501 | " name \"%s\".\n", cm->charger_psy.name); | |
1502 | goto err_register; | |
1503 | } | |
1504 | ||
bee737bc CC |
1505 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
1506 | struct charger_regulator *charger | |
1507 | = &desc->charger_regulators[i]; | |
3950c786 CC |
1508 | char buf[11]; |
1509 | char *str; | |
bee737bc CC |
1510 | |
1511 | charger->consumer = regulator_get(&pdev->dev, | |
1512 | charger->regulator_name); | |
1513 | if (charger->consumer == NULL) { | |
1514 | dev_err(&pdev->dev, "Cannot find charger(%s)n", | |
1515 | charger->regulator_name); | |
1516 | ret = -EINVAL; | |
1517 | goto err_chg_get; | |
1518 | } | |
3950c786 | 1519 | charger->cm = cm; |
bee737bc CC |
1520 | |
1521 | for (j = 0 ; j < charger->num_cables ; j++) { | |
1522 | struct charger_cable *cable = &charger->cables[j]; | |
1523 | ||
1524 | ret = charger_extcon_init(cm, cable); | |
1525 | if (ret < 0) { | |
1526 | dev_err(&pdev->dev, "Cannot find charger(%s)n", | |
1527 | charger->regulator_name); | |
1528 | goto err_extcon; | |
1529 | } | |
1530 | cable->charger = charger; | |
1531 | cable->cm = cm; | |
1532 | } | |
3950c786 CC |
1533 | |
1534 | /* Create sysfs entry to control charger(regulator) */ | |
1535 | snprintf(buf, 10, "charger.%d", i); | |
1536 | str = kzalloc(sizeof(char) * (strlen(buf) + 1), GFP_KERNEL); | |
1537 | if (!str) { | |
1538 | for (i--; i >= 0; i--) { | |
1539 | charger = &desc->charger_regulators[i]; | |
1540 | kfree(charger->attr_g.name); | |
1541 | } | |
1542 | ret = -ENOMEM; | |
1543 | ||
1544 | goto err_extcon; | |
1545 | } | |
1546 | strcpy(str, buf); | |
1547 | ||
1548 | charger->attrs[0] = &charger->attr_name.attr; | |
1549 | charger->attrs[1] = &charger->attr_state.attr; | |
1550 | charger->attrs[2] = &charger->attr_externally_control.attr; | |
1551 | charger->attrs[3] = NULL; | |
1552 | charger->attr_g.name = str; | |
1553 | charger->attr_g.attrs = charger->attrs; | |
1554 | ||
1555 | sysfs_attr_init(&charger->attr_name.attr); | |
1556 | charger->attr_name.attr.name = "name"; | |
1557 | charger->attr_name.attr.mode = 0444; | |
1558 | charger->attr_name.show = charger_name_show; | |
1559 | ||
1560 | sysfs_attr_init(&charger->attr_state.attr); | |
1561 | charger->attr_state.attr.name = "state"; | |
1562 | charger->attr_state.attr.mode = 0444; | |
1563 | charger->attr_state.show = charger_state_show; | |
1564 | ||
1565 | sysfs_attr_init(&charger->attr_externally_control.attr); | |
1566 | charger->attr_externally_control.attr.name | |
1567 | = "externally_control"; | |
1568 | charger->attr_externally_control.attr.mode = 0644; | |
1569 | charger->attr_externally_control.show | |
1570 | = charger_externally_control_show; | |
1571 | charger->attr_externally_control.store | |
1572 | = charger_externally_control_store; | |
1573 | ||
1574 | if (!desc->charger_regulators[i].externally_control || | |
1575 | !chargers_externally_control) { | |
1576 | chargers_externally_control = 0; | |
1577 | } | |
1578 | dev_info(&pdev->dev, "'%s' regulator's externally_control" | |
1579 | "is %d\n", charger->regulator_name, | |
1580 | charger->externally_control); | |
1581 | ||
1582 | ret = sysfs_create_group(&cm->charger_psy.dev->kobj, | |
1583 | &charger->attr_g); | |
1584 | if (ret < 0) { | |
1585 | dev_info(&pdev->dev, "Cannot create sysfs entry" | |
1586 | "of %s regulator\n", | |
1587 | charger->regulator_name); | |
1588 | } | |
1589 | } | |
1590 | ||
1591 | if (chargers_externally_control) { | |
1592 | dev_err(&pdev->dev, "Cannot register regulator because " | |
1593 | "charger-manager must need at least " | |
1594 | "one charger for charging battery\n"); | |
1595 | ||
1596 | ret = -EINVAL; | |
1597 | goto err_chg_enable; | |
3bb3dbbd DK |
1598 | } |
1599 | ||
1600 | ret = try_charger_enable(cm, true); | |
1601 | if (ret) { | |
1602 | dev_err(&pdev->dev, "Cannot enable charger regulators\n"); | |
1603 | goto err_chg_enable; | |
1604 | } | |
1605 | ||
1606 | /* Add to the list */ | |
1607 | mutex_lock(&cm_list_mtx); | |
1608 | list_add(&cm->entry, &cm_list); | |
1609 | mutex_unlock(&cm_list_mtx); | |
1610 | ||
dfeccb12 CC |
1611 | /* |
1612 | * Charger-manager is capable of waking up the systme from sleep | |
1613 | * when event is happend through cm_notify_event() | |
1614 | */ | |
1615 | device_init_wakeup(&pdev->dev, true); | |
1616 | device_set_wakeup_capable(&pdev->dev, false); | |
1617 | ||
d829dc75 CC |
1618 | schedule_work(&setup_polling); |
1619 | ||
3bb3dbbd DK |
1620 | return 0; |
1621 | ||
1622 | err_chg_enable: | |
3950c786 CC |
1623 | for (i = 0; i < desc->num_charger_regulators; i++) { |
1624 | struct charger_regulator *charger; | |
1625 | ||
1626 | charger = &desc->charger_regulators[i]; | |
1627 | sysfs_remove_group(&cm->charger_psy.dev->kobj, | |
1628 | &charger->attr_g); | |
1629 | kfree(charger->attr_g.name); | |
1630 | } | |
bee737bc CC |
1631 | err_extcon: |
1632 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { | |
1633 | struct charger_regulator *charger | |
1634 | = &desc->charger_regulators[i]; | |
1635 | for (j = 0 ; j < charger->num_cables ; j++) { | |
1636 | struct charger_cable *cable = &charger->cables[j]; | |
1637 | extcon_unregister_interest(&cable->extcon_dev); | |
1638 | } | |
1639 | } | |
1640 | err_chg_get: | |
1641 | for (i = 0 ; i < desc->num_charger_regulators ; i++) | |
1642 | regulator_put(desc->charger_regulators[i].consumer); | |
1643 | ||
ad3d13ee DK |
1644 | power_supply_unregister(&cm->charger_psy); |
1645 | err_register: | |
1646 | kfree(cm->charger_psy.properties); | |
3bb3dbbd DK |
1647 | err_chg_stat: |
1648 | kfree(cm->charger_stat); | |
1649 | err_no_charger_stat: | |
1650 | err_no_charger: | |
1651 | kfree(cm->desc); | |
1652 | err_alloc_desc: | |
1653 | kfree(cm); | |
1654 | err_alloc: | |
1655 | return ret; | |
1656 | } | |
1657 | ||
415ec69f | 1658 | static int charger_manager_remove(struct platform_device *pdev) |
3bb3dbbd DK |
1659 | { |
1660 | struct charger_manager *cm = platform_get_drvdata(pdev); | |
1661 | struct charger_desc *desc = cm->desc; | |
bee737bc CC |
1662 | int i = 0; |
1663 | int j = 0; | |
3bb3dbbd DK |
1664 | |
1665 | /* Remove from the list */ | |
1666 | mutex_lock(&cm_list_mtx); | |
1667 | list_del(&cm->entry); | |
1668 | mutex_unlock(&cm_list_mtx); | |
1669 | ||
d829dc75 CC |
1670 | if (work_pending(&setup_polling)) |
1671 | cancel_work_sync(&setup_polling); | |
1672 | if (delayed_work_pending(&cm_monitor_work)) | |
1673 | cancel_delayed_work_sync(&cm_monitor_work); | |
1674 | ||
bee737bc CC |
1675 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
1676 | struct charger_regulator *charger | |
1677 | = &desc->charger_regulators[i]; | |
1678 | for (j = 0 ; j < charger->num_cables ; j++) { | |
1679 | struct charger_cable *cable = &charger->cables[j]; | |
1680 | extcon_unregister_interest(&cable->extcon_dev); | |
1681 | } | |
1682 | } | |
1683 | ||
1684 | for (i = 0 ; i < desc->num_charger_regulators ; i++) | |
1685 | regulator_put(desc->charger_regulators[i].consumer); | |
1686 | ||
ad3d13ee | 1687 | power_supply_unregister(&cm->charger_psy); |
d829dc75 CC |
1688 | |
1689 | try_charger_enable(cm, false); | |
1690 | ||
ad3d13ee | 1691 | kfree(cm->charger_psy.properties); |
3bb3dbbd DK |
1692 | kfree(cm->charger_stat); |
1693 | kfree(cm->desc); | |
1694 | kfree(cm); | |
1695 | ||
1696 | return 0; | |
1697 | } | |
1698 | ||
1bbe24d4 | 1699 | static const struct platform_device_id charger_manager_id[] = { |
3bb3dbbd DK |
1700 | { "charger-manager", 0 }, |
1701 | { }, | |
1702 | }; | |
1bbe24d4 | 1703 | MODULE_DEVICE_TABLE(platform, charger_manager_id); |
3bb3dbbd | 1704 | |
dfeccb12 CC |
1705 | static int cm_suspend_noirq(struct device *dev) |
1706 | { | |
1707 | int ret = 0; | |
1708 | ||
1709 | if (device_may_wakeup(dev)) { | |
1710 | device_set_wakeup_capable(dev, false); | |
1711 | ret = -EAGAIN; | |
1712 | } | |
1713 | ||
1714 | return ret; | |
1715 | } | |
1716 | ||
3bb3dbbd DK |
1717 | static int cm_suspend_prepare(struct device *dev) |
1718 | { | |
bb2a95c2 | 1719 | struct charger_manager *cm = dev_get_drvdata(dev); |
3bb3dbbd DK |
1720 | |
1721 | if (!cm_suspended) { | |
1722 | if (rtc_dev) { | |
1723 | struct rtc_time tmp; | |
1724 | unsigned long now; | |
1725 | ||
1726 | rtc_read_alarm(rtc_dev, &rtc_wkalarm_save); | |
1727 | rtc_read_time(rtc_dev, &tmp); | |
1728 | ||
1729 | if (rtc_wkalarm_save.enabled) { | |
1730 | rtc_tm_to_time(&rtc_wkalarm_save.time, | |
1731 | &rtc_wkalarm_save_time); | |
1732 | rtc_tm_to_time(&tmp, &now); | |
1733 | if (now > rtc_wkalarm_save_time) | |
1734 | rtc_wkalarm_save_time = 0; | |
1735 | } else { | |
1736 | rtc_wkalarm_save_time = 0; | |
1737 | } | |
1738 | } | |
1739 | cm_suspended = true; | |
1740 | } | |
1741 | ||
d829dc75 CC |
1742 | if (delayed_work_pending(&cm->fullbatt_vchk_work)) |
1743 | cancel_delayed_work(&cm->fullbatt_vchk_work); | |
3bb3dbbd DK |
1744 | cm->status_save_ext_pwr_inserted = is_ext_pwr_online(cm); |
1745 | cm->status_save_batt = is_batt_present(cm); | |
1746 | ||
1747 | if (!cm_rtc_set) { | |
1748 | cm_suspend_duration_ms = 0; | |
1749 | cm_rtc_set = cm_setup_timer(); | |
1750 | } | |
1751 | ||
1752 | return 0; | |
1753 | } | |
1754 | ||
1755 | static void cm_suspend_complete(struct device *dev) | |
1756 | { | |
bb2a95c2 | 1757 | struct charger_manager *cm = dev_get_drvdata(dev); |
3bb3dbbd DK |
1758 | |
1759 | if (cm_suspended) { | |
1760 | if (rtc_dev) { | |
1761 | struct rtc_wkalrm tmp; | |
1762 | ||
1763 | rtc_read_alarm(rtc_dev, &tmp); | |
1764 | rtc_wkalarm_save.pending = tmp.pending; | |
1765 | rtc_set_alarm(rtc_dev, &rtc_wkalarm_save); | |
1766 | } | |
1767 | cm_suspended = false; | |
1768 | cm_rtc_set = false; | |
1769 | } | |
1770 | ||
d829dc75 CC |
1771 | /* Re-enqueue delayed work (fullbatt_vchk_work) */ |
1772 | if (cm->fullbatt_vchk_jiffies_at) { | |
1773 | unsigned long delay = 0; | |
1774 | unsigned long now = jiffies + CM_JIFFIES_SMALL; | |
1775 | ||
1776 | if (time_after_eq(now, cm->fullbatt_vchk_jiffies_at)) { | |
1777 | delay = (unsigned long)((long)now | |
1778 | - (long)(cm->fullbatt_vchk_jiffies_at)); | |
1779 | delay = jiffies_to_msecs(delay); | |
1780 | } else { | |
1781 | delay = 0; | |
1782 | } | |
1783 | ||
1784 | /* | |
1785 | * Account for cm_suspend_duration_ms if | |
1786 | * assume_timer_stops_in_suspend is active | |
1787 | */ | |
1788 | if (g_desc && g_desc->assume_timer_stops_in_suspend) { | |
1789 | if (delay > cm_suspend_duration_ms) | |
1790 | delay -= cm_suspend_duration_ms; | |
1791 | else | |
1792 | delay = 0; | |
1793 | } | |
1794 | ||
1795 | queue_delayed_work(cm_wq, &cm->fullbatt_vchk_work, | |
1796 | msecs_to_jiffies(delay)); | |
1797 | } | |
dfeccb12 | 1798 | device_set_wakeup_capable(cm->dev, false); |
3bb3dbbd DK |
1799 | uevent_notify(cm, NULL); |
1800 | } | |
1801 | ||
1802 | static const struct dev_pm_ops charger_manager_pm = { | |
1803 | .prepare = cm_suspend_prepare, | |
dfeccb12 | 1804 | .suspend_noirq = cm_suspend_noirq, |
3bb3dbbd DK |
1805 | .complete = cm_suspend_complete, |
1806 | }; | |
1807 | ||
1808 | static struct platform_driver charger_manager_driver = { | |
1809 | .driver = { | |
1810 | .name = "charger-manager", | |
1811 | .owner = THIS_MODULE, | |
1812 | .pm = &charger_manager_pm, | |
1813 | }, | |
1814 | .probe = charger_manager_probe, | |
28ea73f4 | 1815 | .remove = charger_manager_remove, |
3bb3dbbd DK |
1816 | .id_table = charger_manager_id, |
1817 | }; | |
1818 | ||
1819 | static int __init charger_manager_init(void) | |
1820 | { | |
d829dc75 CC |
1821 | cm_wq = create_freezable_workqueue("charger_manager"); |
1822 | INIT_DELAYED_WORK(&cm_monitor_work, cm_monitor_poller); | |
1823 | ||
3bb3dbbd DK |
1824 | return platform_driver_register(&charger_manager_driver); |
1825 | } | |
1826 | late_initcall(charger_manager_init); | |
1827 | ||
1828 | static void __exit charger_manager_cleanup(void) | |
1829 | { | |
d829dc75 CC |
1830 | destroy_workqueue(cm_wq); |
1831 | cm_wq = NULL; | |
1832 | ||
3bb3dbbd DK |
1833 | platform_driver_unregister(&charger_manager_driver); |
1834 | } | |
1835 | module_exit(charger_manager_cleanup); | |
1836 | ||
dfeccb12 CC |
1837 | /** |
1838 | * find_power_supply - find the associated power_supply of charger | |
1839 | * @cm: the Charger Manager representing the battery | |
1840 | * @psy: pointer to instance of charger's power_supply | |
1841 | */ | |
1842 | static bool find_power_supply(struct charger_manager *cm, | |
1843 | struct power_supply *psy) | |
1844 | { | |
1845 | int i; | |
1846 | bool found = false; | |
1847 | ||
1848 | for (i = 0; cm->charger_stat[i]; i++) { | |
1849 | if (psy == cm->charger_stat[i]) { | |
1850 | found = true; | |
1851 | break; | |
1852 | } | |
1853 | } | |
1854 | ||
1855 | return found; | |
1856 | } | |
1857 | ||
1858 | /** | |
1859 | * cm_notify_event - charger driver notify Charger Manager of charger event | |
1860 | * @psy: pointer to instance of charger's power_supply | |
1861 | * @type: type of charger event | |
1862 | * @msg: optional message passed to uevent_notify fuction | |
1863 | */ | |
1864 | void cm_notify_event(struct power_supply *psy, enum cm_event_types type, | |
1865 | char *msg) | |
1866 | { | |
1867 | struct charger_manager *cm; | |
1868 | bool found_power_supply = false; | |
1869 | ||
1870 | if (psy == NULL) | |
1871 | return; | |
1872 | ||
1873 | mutex_lock(&cm_list_mtx); | |
1874 | list_for_each_entry(cm, &cm_list, entry) { | |
1875 | found_power_supply = find_power_supply(cm, psy); | |
1876 | if (found_power_supply) | |
1877 | break; | |
1878 | } | |
1879 | mutex_unlock(&cm_list_mtx); | |
1880 | ||
1881 | if (!found_power_supply) | |
1882 | return; | |
1883 | ||
1884 | switch (type) { | |
1885 | case CM_EVENT_BATT_FULL: | |
1886 | fullbatt_handler(cm); | |
1887 | break; | |
1888 | case CM_EVENT_BATT_OUT: | |
1889 | battout_handler(cm); | |
1890 | break; | |
1891 | case CM_EVENT_BATT_IN: | |
1892 | case CM_EVENT_EXT_PWR_IN_OUT ... CM_EVENT_CHG_START_STOP: | |
1893 | misc_event_handler(cm, type); | |
1894 | break; | |
1895 | case CM_EVENT_UNKNOWN: | |
1896 | case CM_EVENT_OTHERS: | |
1897 | uevent_notify(cm, msg ? msg : default_event_names[type]); | |
1898 | break; | |
1899 | default: | |
1900 | dev_err(cm->dev, "%s type not specified.\n", __func__); | |
1901 | break; | |
1902 | } | |
1903 | } | |
1904 | EXPORT_SYMBOL_GPL(cm_notify_event); | |
1905 | ||
3bb3dbbd DK |
1906 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); |
1907 | MODULE_DESCRIPTION("Charger Manager"); | |
1908 | MODULE_LICENSE("GPL"); |