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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 | ||
e5409cbd JP |
15 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
16 | ||
3bb3dbbd DK |
17 | #include <linux/io.h> |
18 | #include <linux/module.h> | |
19 | #include <linux/irq.h> | |
20 | #include <linux/interrupt.h> | |
21 | #include <linux/rtc.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/workqueue.h> | |
24 | #include <linux/platform_device.h> | |
25 | #include <linux/power/charger-manager.h> | |
26 | #include <linux/regulator/consumer.h> | |
3950c786 | 27 | #include <linux/sysfs.h> |
3bb3dbbd | 28 | |
dfeccb12 CC |
29 | static const char * const default_event_names[] = { |
30 | [CM_EVENT_UNKNOWN] = "Unknown", | |
31 | [CM_EVENT_BATT_FULL] = "Battery Full", | |
32 | [CM_EVENT_BATT_IN] = "Battery Inserted", | |
33 | [CM_EVENT_BATT_OUT] = "Battery Pulled Out", | |
34 | [CM_EVENT_EXT_PWR_IN_OUT] = "External Power Attach/Detach", | |
35 | [CM_EVENT_CHG_START_STOP] = "Charging Start/Stop", | |
36 | [CM_EVENT_OTHERS] = "Other battery events" | |
37 | }; | |
38 | ||
3bb3dbbd DK |
39 | /* |
40 | * Regard CM_JIFFIES_SMALL jiffies is small enough to ignore for | |
41 | * delayed works so that we can run delayed works with CM_JIFFIES_SMALL | |
42 | * without any delays. | |
43 | */ | |
44 | #define CM_JIFFIES_SMALL (2) | |
45 | ||
46 | /* If y is valid (> 0) and smaller than x, do x = y */ | |
47 | #define CM_MIN_VALID(x, y) x = (((y > 0) && ((x) > (y))) ? (y) : (x)) | |
48 | ||
49 | /* | |
50 | * Regard CM_RTC_SMALL (sec) is small enough to ignore error in invoking | |
51 | * rtc alarm. It should be 2 or larger | |
52 | */ | |
53 | #define CM_RTC_SMALL (2) | |
54 | ||
55 | #define UEVENT_BUF_SIZE 32 | |
56 | ||
57 | static LIST_HEAD(cm_list); | |
58 | static DEFINE_MUTEX(cm_list_mtx); | |
59 | ||
60 | /* About in-suspend (suspend-again) monitoring */ | |
61 | static struct rtc_device *rtc_dev; | |
62 | /* | |
63 | * Backup RTC alarm | |
64 | * Save the wakeup alarm before entering suspend-to-RAM | |
65 | */ | |
66 | static struct rtc_wkalrm rtc_wkalarm_save; | |
67 | /* Backup RTC alarm time in terms of seconds since 01-01-1970 00:00:00 */ | |
68 | static unsigned long rtc_wkalarm_save_time; | |
69 | static bool cm_suspended; | |
70 | static bool cm_rtc_set; | |
71 | static unsigned long cm_suspend_duration_ms; | |
72 | ||
d829dc75 CC |
73 | /* About normal (not suspended) monitoring */ |
74 | static unsigned long polling_jiffy = ULONG_MAX; /* ULONG_MAX: no polling */ | |
75 | static unsigned long next_polling; /* Next appointed polling time */ | |
76 | static struct workqueue_struct *cm_wq; /* init at driver add */ | |
77 | static struct delayed_work cm_monitor_work; /* init at driver add */ | |
78 | ||
3bb3dbbd DK |
79 | /* Global charger-manager description */ |
80 | static struct charger_global_desc *g_desc; /* init with setup_charger_manager */ | |
81 | ||
82 | /** | |
83 | * is_batt_present - See if the battery presents in place. | |
84 | * @cm: the Charger Manager representing the battery. | |
85 | */ | |
86 | static bool is_batt_present(struct charger_manager *cm) | |
87 | { | |
88 | union power_supply_propval val; | |
89 | bool present = false; | |
90 | int i, ret; | |
91 | ||
92 | switch (cm->desc->battery_present) { | |
d829dc75 CC |
93 | case CM_BATTERY_PRESENT: |
94 | present = true; | |
95 | break; | |
96 | case CM_NO_BATTERY: | |
97 | break; | |
3bb3dbbd DK |
98 | case CM_FUEL_GAUGE: |
99 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
100 | POWER_SUPPLY_PROP_PRESENT, &val); | |
101 | if (ret == 0 && val.intval) | |
102 | present = true; | |
103 | break; | |
104 | case CM_CHARGER_STAT: | |
105 | for (i = 0; cm->charger_stat[i]; i++) { | |
106 | ret = cm->charger_stat[i]->get_property( | |
107 | cm->charger_stat[i], | |
108 | POWER_SUPPLY_PROP_PRESENT, &val); | |
109 | if (ret == 0 && val.intval) { | |
110 | present = true; | |
111 | break; | |
112 | } | |
113 | } | |
114 | break; | |
115 | } | |
116 | ||
117 | return present; | |
118 | } | |
119 | ||
120 | /** | |
121 | * is_ext_pwr_online - See if an external power source is attached to charge | |
122 | * @cm: the Charger Manager representing the battery. | |
123 | * | |
124 | * Returns true if at least one of the chargers of the battery has an external | |
125 | * power source attached to charge the battery regardless of whether it is | |
126 | * actually charging or not. | |
127 | */ | |
128 | static bool is_ext_pwr_online(struct charger_manager *cm) | |
129 | { | |
130 | union power_supply_propval val; | |
131 | bool online = false; | |
132 | int i, ret; | |
133 | ||
134 | /* If at least one of them has one, it's yes. */ | |
135 | for (i = 0; cm->charger_stat[i]; i++) { | |
136 | ret = cm->charger_stat[i]->get_property( | |
137 | cm->charger_stat[i], | |
138 | POWER_SUPPLY_PROP_ONLINE, &val); | |
139 | if (ret == 0 && val.intval) { | |
140 | online = true; | |
141 | break; | |
142 | } | |
143 | } | |
144 | ||
145 | return online; | |
146 | } | |
147 | ||
ad3d13ee DK |
148 | /** |
149 | * get_batt_uV - Get the voltage level of the battery | |
150 | * @cm: the Charger Manager representing the battery. | |
151 | * @uV: the voltage level returned. | |
152 | * | |
153 | * Returns 0 if there is no error. | |
154 | * Returns a negative value on error. | |
155 | */ | |
156 | static int get_batt_uV(struct charger_manager *cm, int *uV) | |
157 | { | |
158 | union power_supply_propval val; | |
159 | int ret; | |
160 | ||
bb2a95c2 | 161 | if (!cm->fuel_gauge) |
ad3d13ee DK |
162 | return -ENODEV; |
163 | ||
bb2a95c2 AL |
164 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, |
165 | POWER_SUPPLY_PROP_VOLTAGE_NOW, &val); | |
ad3d13ee DK |
166 | if (ret) |
167 | return ret; | |
168 | ||
169 | *uV = val.intval; | |
170 | return 0; | |
171 | } | |
172 | ||
3bb3dbbd DK |
173 | /** |
174 | * is_charging - Returns true if the battery is being charged. | |
175 | * @cm: the Charger Manager representing the battery. | |
176 | */ | |
177 | static bool is_charging(struct charger_manager *cm) | |
178 | { | |
179 | int i, ret; | |
180 | bool charging = false; | |
181 | union power_supply_propval val; | |
182 | ||
183 | /* If there is no battery, it cannot be charged */ | |
184 | if (!is_batt_present(cm)) | |
185 | return false; | |
186 | ||
187 | /* If at least one of the charger is charging, return yes */ | |
188 | for (i = 0; cm->charger_stat[i]; i++) { | |
189 | /* 1. The charger sholuld not be DISABLED */ | |
190 | if (cm->emergency_stop) | |
191 | continue; | |
192 | if (!cm->charger_enabled) | |
193 | continue; | |
194 | ||
195 | /* 2. The charger should be online (ext-power) */ | |
196 | ret = cm->charger_stat[i]->get_property( | |
197 | cm->charger_stat[i], | |
198 | POWER_SUPPLY_PROP_ONLINE, &val); | |
199 | if (ret) { | |
e5409cbd JP |
200 | dev_warn(cm->dev, "Cannot read ONLINE value from %s\n", |
201 | cm->desc->psy_charger_stat[i]); | |
3bb3dbbd DK |
202 | continue; |
203 | } | |
204 | if (val.intval == 0) | |
205 | continue; | |
206 | ||
207 | /* | |
208 | * 3. The charger should not be FULL, DISCHARGING, | |
209 | * or NOT_CHARGING. | |
210 | */ | |
211 | ret = cm->charger_stat[i]->get_property( | |
212 | cm->charger_stat[i], | |
213 | POWER_SUPPLY_PROP_STATUS, &val); | |
214 | if (ret) { | |
e5409cbd JP |
215 | dev_warn(cm->dev, "Cannot read STATUS value from %s\n", |
216 | cm->desc->psy_charger_stat[i]); | |
3bb3dbbd DK |
217 | continue; |
218 | } | |
219 | if (val.intval == POWER_SUPPLY_STATUS_FULL || | |
220 | val.intval == POWER_SUPPLY_STATUS_DISCHARGING || | |
221 | val.intval == POWER_SUPPLY_STATUS_NOT_CHARGING) | |
222 | continue; | |
223 | ||
224 | /* Then, this is charging. */ | |
225 | charging = true; | |
226 | break; | |
227 | } | |
228 | ||
229 | return charging; | |
230 | } | |
231 | ||
2ed9e9b6 CC |
232 | /** |
233 | * is_full_charged - Returns true if the battery is fully charged. | |
234 | * @cm: the Charger Manager representing the battery. | |
235 | */ | |
236 | static bool is_full_charged(struct charger_manager *cm) | |
237 | { | |
238 | struct charger_desc *desc = cm->desc; | |
239 | union power_supply_propval val; | |
240 | int ret = 0; | |
241 | int uV; | |
242 | ||
243 | /* If there is no battery, it cannot be charged */ | |
0fa11dbc CC |
244 | if (!is_batt_present(cm)) |
245 | return false; | |
2ed9e9b6 CC |
246 | |
247 | if (cm->fuel_gauge && desc->fullbatt_full_capacity > 0) { | |
0fa11dbc CC |
248 | val.intval = 0; |
249 | ||
2ed9e9b6 CC |
250 | /* Not full if capacity of fuel gauge isn't full */ |
251 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
252 | POWER_SUPPLY_PROP_CHARGE_FULL, &val); | |
0fa11dbc CC |
253 | if (!ret && val.intval > desc->fullbatt_full_capacity) |
254 | return true; | |
2ed9e9b6 CC |
255 | } |
256 | ||
257 | /* Full, if it's over the fullbatt voltage */ | |
258 | if (desc->fullbatt_uV > 0) { | |
259 | ret = get_batt_uV(cm, &uV); | |
0fa11dbc CC |
260 | if (!ret && uV >= desc->fullbatt_uV) |
261 | return true; | |
2ed9e9b6 CC |
262 | } |
263 | ||
264 | /* Full, if the capacity is more than fullbatt_soc */ | |
265 | if (cm->fuel_gauge && desc->fullbatt_soc > 0) { | |
0fa11dbc CC |
266 | val.intval = 0; |
267 | ||
2ed9e9b6 CC |
268 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, |
269 | POWER_SUPPLY_PROP_CAPACITY, &val); | |
0fa11dbc CC |
270 | if (!ret && val.intval >= desc->fullbatt_soc) |
271 | return true; | |
2ed9e9b6 CC |
272 | } |
273 | ||
0fa11dbc | 274 | return false; |
2ed9e9b6 CC |
275 | } |
276 | ||
3bb3dbbd DK |
277 | /** |
278 | * is_polling_required - Return true if need to continue polling for this CM. | |
279 | * @cm: the Charger Manager representing the battery. | |
280 | */ | |
281 | static bool is_polling_required(struct charger_manager *cm) | |
282 | { | |
283 | switch (cm->desc->polling_mode) { | |
284 | case CM_POLL_DISABLE: | |
285 | return false; | |
286 | case CM_POLL_ALWAYS: | |
287 | return true; | |
288 | case CM_POLL_EXTERNAL_POWER_ONLY: | |
289 | return is_ext_pwr_online(cm); | |
290 | case CM_POLL_CHARGING_ONLY: | |
291 | return is_charging(cm); | |
292 | default: | |
293 | dev_warn(cm->dev, "Incorrect polling_mode (%d)\n", | |
e5409cbd | 294 | cm->desc->polling_mode); |
3bb3dbbd DK |
295 | } |
296 | ||
297 | return false; | |
298 | } | |
299 | ||
300 | /** | |
301 | * try_charger_enable - Enable/Disable chargers altogether | |
302 | * @cm: the Charger Manager representing the battery. | |
303 | * @enable: true: enable / false: disable | |
304 | * | |
305 | * Note that Charger Manager keeps the charger enabled regardless whether | |
306 | * the charger is charging or not (because battery is full or no external | |
307 | * power source exists) except when CM needs to disable chargers forcibly | |
308 | * bacause of emergency causes; when the battery is overheated or too cold. | |
309 | */ | |
310 | static int try_charger_enable(struct charger_manager *cm, bool enable) | |
311 | { | |
312 | int err = 0, i; | |
313 | struct charger_desc *desc = cm->desc; | |
314 | ||
315 | /* Ignore if it's redundent command */ | |
bb2a95c2 | 316 | if (enable == cm->charger_enabled) |
3bb3dbbd DK |
317 | return 0; |
318 | ||
319 | if (enable) { | |
320 | if (cm->emergency_stop) | |
321 | return -EAGAIN; | |
8fcfe088 CC |
322 | |
323 | /* | |
324 | * Save start time of charging to limit | |
325 | * maximum possible charging time. | |
326 | */ | |
327 | cm->charging_start_time = ktime_to_ms(ktime_get()); | |
328 | cm->charging_end_time = 0; | |
329 | ||
dbb61fc7 | 330 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
3950c786 CC |
331 | if (desc->charger_regulators[i].externally_control) |
332 | continue; | |
333 | ||
dbb61fc7 CC |
334 | err = regulator_enable(desc->charger_regulators[i].consumer); |
335 | if (err < 0) { | |
e5409cbd JP |
336 | dev_warn(cm->dev, "Cannot enable %s regulator\n", |
337 | desc->charger_regulators[i].regulator_name); | |
dbb61fc7 CC |
338 | } |
339 | } | |
3bb3dbbd | 340 | } else { |
8fcfe088 CC |
341 | /* |
342 | * Save end time of charging to maintain fully charged state | |
343 | * of battery after full-batt. | |
344 | */ | |
345 | cm->charging_start_time = 0; | |
346 | cm->charging_end_time = ktime_to_ms(ktime_get()); | |
347 | ||
dbb61fc7 | 348 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
3950c786 CC |
349 | if (desc->charger_regulators[i].externally_control) |
350 | continue; | |
351 | ||
dbb61fc7 CC |
352 | err = regulator_disable(desc->charger_regulators[i].consumer); |
353 | if (err < 0) { | |
e5409cbd JP |
354 | dev_warn(cm->dev, "Cannot disable %s regulator\n", |
355 | desc->charger_regulators[i].regulator_name); | |
dbb61fc7 CC |
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); | |
e5409cbd JP |
368 | dev_warn(cm->dev, "Disable regulator(%s) forcibly\n", |
369 | desc->charger_regulators[i].regulator_name); | |
3bb3dbbd DK |
370 | } |
371 | } | |
372 | } | |
373 | ||
374 | if (!err) | |
375 | cm->charger_enabled = enable; | |
376 | ||
377 | return err; | |
378 | } | |
379 | ||
d829dc75 CC |
380 | /** |
381 | * try_charger_restart - Restart charging. | |
382 | * @cm: the Charger Manager representing the battery. | |
383 | * | |
384 | * Restart charging by turning off and on the charger. | |
385 | */ | |
386 | static int try_charger_restart(struct charger_manager *cm) | |
387 | { | |
388 | int err; | |
389 | ||
390 | if (cm->emergency_stop) | |
391 | return -EAGAIN; | |
392 | ||
393 | err = try_charger_enable(cm, false); | |
394 | if (err) | |
395 | return err; | |
396 | ||
397 | return try_charger_enable(cm, true); | |
398 | } | |
399 | ||
3bb3dbbd DK |
400 | /** |
401 | * uevent_notify - Let users know something has changed. | |
402 | * @cm: the Charger Manager representing the battery. | |
403 | * @event: the event string. | |
404 | * | |
405 | * If @event is null, it implies that uevent_notify is called | |
406 | * by resume function. When called in the resume function, cm_suspended | |
407 | * should be already reset to false in order to let uevent_notify | |
408 | * notify the recent event during the suspend to users. While | |
409 | * suspended, uevent_notify does not notify users, but tracks | |
410 | * events so that uevent_notify can notify users later after resumed. | |
411 | */ | |
412 | static void uevent_notify(struct charger_manager *cm, const char *event) | |
413 | { | |
414 | static char env_str[UEVENT_BUF_SIZE + 1] = ""; | |
415 | static char env_str_save[UEVENT_BUF_SIZE + 1] = ""; | |
416 | ||
417 | if (cm_suspended) { | |
418 | /* Nothing in suspended-event buffer */ | |
419 | if (env_str_save[0] == 0) { | |
420 | if (!strncmp(env_str, event, UEVENT_BUF_SIZE)) | |
421 | return; /* status not changed */ | |
422 | strncpy(env_str_save, event, UEVENT_BUF_SIZE); | |
423 | return; | |
424 | } | |
425 | ||
426 | if (!strncmp(env_str_save, event, UEVENT_BUF_SIZE)) | |
427 | return; /* Duplicated. */ | |
bb2a95c2 | 428 | strncpy(env_str_save, event, UEVENT_BUF_SIZE); |
3bb3dbbd DK |
429 | return; |
430 | } | |
431 | ||
432 | if (event == NULL) { | |
433 | /* No messages pending */ | |
434 | if (!env_str_save[0]) | |
435 | return; | |
436 | ||
437 | strncpy(env_str, env_str_save, UEVENT_BUF_SIZE); | |
438 | kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE); | |
439 | env_str_save[0] = 0; | |
440 | ||
441 | return; | |
442 | } | |
443 | ||
444 | /* status not changed */ | |
445 | if (!strncmp(env_str, event, UEVENT_BUF_SIZE)) | |
446 | return; | |
447 | ||
448 | /* save the status and notify the update */ | |
449 | strncpy(env_str, event, UEVENT_BUF_SIZE); | |
450 | kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE); | |
451 | ||
e5409cbd | 452 | dev_info(cm->dev, "%s\n", event); |
3bb3dbbd DK |
453 | } |
454 | ||
d829dc75 CC |
455 | /** |
456 | * fullbatt_vchk - Check voltage drop some times after "FULL" event. | |
457 | * @work: the work_struct appointing the function | |
458 | * | |
459 | * If a user has designated "fullbatt_vchkdrop_ms/uV" values with | |
460 | * charger_desc, Charger Manager checks voltage drop after the battery | |
461 | * "FULL" event. It checks whether the voltage has dropped more than | |
462 | * fullbatt_vchkdrop_uV by calling this function after fullbatt_vchkrop_ms. | |
463 | */ | |
464 | static void fullbatt_vchk(struct work_struct *work) | |
465 | { | |
466 | struct delayed_work *dwork = to_delayed_work(work); | |
467 | struct charger_manager *cm = container_of(dwork, | |
468 | struct charger_manager, fullbatt_vchk_work); | |
469 | struct charger_desc *desc = cm->desc; | |
470 | int batt_uV, err, diff; | |
471 | ||
472 | /* remove the appointment for fullbatt_vchk */ | |
473 | cm->fullbatt_vchk_jiffies_at = 0; | |
474 | ||
475 | if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms) | |
476 | return; | |
477 | ||
478 | err = get_batt_uV(cm, &batt_uV); | |
479 | if (err) { | |
e5409cbd | 480 | dev_err(cm->dev, "%s: get_batt_uV error(%d)\n", __func__, err); |
d829dc75 CC |
481 | return; |
482 | } | |
483 | ||
f36b9ddb CC |
484 | diff = desc->fullbatt_uV - batt_uV; |
485 | if (diff < 0) | |
486 | return; | |
d829dc75 | 487 | |
e5409cbd | 488 | dev_info(cm->dev, "VBATT dropped %duV after full-batt\n", diff); |
d829dc75 CC |
489 | |
490 | if (diff > desc->fullbatt_vchkdrop_uV) { | |
491 | try_charger_restart(cm); | |
8fcfe088 CC |
492 | uevent_notify(cm, "Recharging"); |
493 | } | |
494 | } | |
495 | ||
496 | /** | |
497 | * check_charging_duration - Monitor charging/discharging duration | |
498 | * @cm: the Charger Manager representing the battery. | |
499 | * | |
500 | * If whole charging duration exceed 'charging_max_duration_ms', | |
501 | * cm stop charging to prevent overcharge/overheat. If discharging | |
502 | * duration exceed 'discharging _max_duration_ms', charger cable is | |
503 | * attached, after full-batt, cm start charging to maintain fully | |
504 | * charged state for battery. | |
505 | */ | |
506 | static int check_charging_duration(struct charger_manager *cm) | |
507 | { | |
508 | struct charger_desc *desc = cm->desc; | |
509 | u64 curr = ktime_to_ms(ktime_get()); | |
510 | u64 duration; | |
511 | int ret = false; | |
512 | ||
513 | if (!desc->charging_max_duration_ms && | |
514 | !desc->discharging_max_duration_ms) | |
515 | return ret; | |
516 | ||
517 | if (cm->charger_enabled) { | |
518 | duration = curr - cm->charging_start_time; | |
519 | ||
520 | if (duration > desc->charging_max_duration_ms) { | |
e5409cbd | 521 | dev_info(cm->dev, "Charging duration exceed %lldms\n", |
8fcfe088 CC |
522 | desc->charging_max_duration_ms); |
523 | uevent_notify(cm, "Discharging"); | |
524 | try_charger_enable(cm, false); | |
525 | ret = true; | |
526 | } | |
527 | } else if (is_ext_pwr_online(cm) && !cm->charger_enabled) { | |
528 | duration = curr - cm->charging_end_time; | |
529 | ||
530 | if (duration > desc->charging_max_duration_ms && | |
531 | is_ext_pwr_online(cm)) { | |
e5409cbd | 532 | dev_info(cm->dev, "Discharging duration exceed %lldms\n", |
8fcfe088 | 533 | desc->discharging_max_duration_ms); |
e5409cbd | 534 | uevent_notify(cm, "Recharging"); |
8fcfe088 CC |
535 | try_charger_enable(cm, true); |
536 | ret = true; | |
537 | } | |
d829dc75 | 538 | } |
8fcfe088 CC |
539 | |
540 | return ret; | |
d829dc75 CC |
541 | } |
542 | ||
3bb3dbbd DK |
543 | /** |
544 | * _cm_monitor - Monitor the temperature and return true for exceptions. | |
545 | * @cm: the Charger Manager representing the battery. | |
546 | * | |
547 | * Returns true if there is an event to notify for the battery. | |
548 | * (True if the status of "emergency_stop" changes) | |
549 | */ | |
550 | static bool _cm_monitor(struct charger_manager *cm) | |
551 | { | |
552 | struct charger_desc *desc = cm->desc; | |
553 | int temp = desc->temperature_out_of_range(&cm->last_temp_mC); | |
554 | ||
555 | dev_dbg(cm->dev, "monitoring (%2.2d.%3.3dC)\n", | |
556 | cm->last_temp_mC / 1000, cm->last_temp_mC % 1000); | |
557 | ||
2ed9e9b6 CC |
558 | /* It has been stopped already */ |
559 | if (temp && cm->emergency_stop) | |
3bb3dbbd DK |
560 | return false; |
561 | ||
2ed9e9b6 CC |
562 | /* |
563 | * Check temperature whether overheat or cold. | |
564 | * If temperature is out of range normal state, stop charging. | |
565 | */ | |
3bb3dbbd DK |
566 | if (temp) { |
567 | cm->emergency_stop = temp; | |
568 | if (!try_charger_enable(cm, false)) { | |
569 | if (temp > 0) | |
570 | uevent_notify(cm, "OVERHEAT"); | |
571 | else | |
572 | uevent_notify(cm, "COLD"); | |
573 | } | |
2ed9e9b6 | 574 | |
8fcfe088 CC |
575 | /* |
576 | * Check whole charging duration and discharing duration | |
577 | * after full-batt. | |
578 | */ | |
579 | } else if (!cm->emergency_stop && check_charging_duration(cm)) { | |
580 | dev_dbg(cm->dev, | |
e5409cbd | 581 | "Charging/Discharging duration is out of range\n"); |
2ed9e9b6 CC |
582 | /* |
583 | * Check dropped voltage of battery. If battery voltage is more | |
584 | * dropped than fullbatt_vchkdrop_uV after fully charged state, | |
585 | * charger-manager have to recharge battery. | |
586 | */ | |
587 | } else if (!cm->emergency_stop && is_ext_pwr_online(cm) && | |
588 | !cm->charger_enabled) { | |
589 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
590 | ||
591 | /* | |
592 | * Check whether fully charged state to protect overcharge | |
593 | * if charger-manager is charging for battery. | |
594 | */ | |
595 | } else if (!cm->emergency_stop && is_full_charged(cm) && | |
596 | cm->charger_enabled) { | |
e5409cbd | 597 | dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged\n"); |
2ed9e9b6 CC |
598 | uevent_notify(cm, default_event_names[CM_EVENT_BATT_FULL]); |
599 | ||
600 | try_charger_enable(cm, false); | |
601 | ||
602 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
3bb3dbbd DK |
603 | } else { |
604 | cm->emergency_stop = 0; | |
2ed9e9b6 CC |
605 | if (is_ext_pwr_online(cm)) { |
606 | if (!try_charger_enable(cm, true)) | |
607 | uevent_notify(cm, "CHARGING"); | |
608 | } | |
3bb3dbbd DK |
609 | } |
610 | ||
611 | return true; | |
612 | } | |
613 | ||
614 | /** | |
615 | * cm_monitor - Monitor every battery. | |
616 | * | |
617 | * Returns true if there is an event to notify from any of the batteries. | |
618 | * (True if the status of "emergency_stop" changes) | |
619 | */ | |
620 | static bool cm_monitor(void) | |
621 | { | |
622 | bool stop = false; | |
623 | struct charger_manager *cm; | |
624 | ||
625 | mutex_lock(&cm_list_mtx); | |
626 | ||
bb2a95c2 AL |
627 | list_for_each_entry(cm, &cm_list, entry) { |
628 | if (_cm_monitor(cm)) | |
629 | stop = true; | |
630 | } | |
3bb3dbbd DK |
631 | |
632 | mutex_unlock(&cm_list_mtx); | |
633 | ||
634 | return stop; | |
635 | } | |
636 | ||
d829dc75 CC |
637 | /** |
638 | * _setup_polling - Setup the next instance of polling. | |
639 | * @work: work_struct of the function _setup_polling. | |
640 | */ | |
641 | static void _setup_polling(struct work_struct *work) | |
642 | { | |
643 | unsigned long min = ULONG_MAX; | |
644 | struct charger_manager *cm; | |
645 | bool keep_polling = false; | |
646 | unsigned long _next_polling; | |
647 | ||
648 | mutex_lock(&cm_list_mtx); | |
649 | ||
650 | list_for_each_entry(cm, &cm_list, entry) { | |
651 | if (is_polling_required(cm) && cm->desc->polling_interval_ms) { | |
652 | keep_polling = true; | |
653 | ||
654 | if (min > cm->desc->polling_interval_ms) | |
655 | min = cm->desc->polling_interval_ms; | |
656 | } | |
657 | } | |
658 | ||
659 | polling_jiffy = msecs_to_jiffies(min); | |
660 | if (polling_jiffy <= CM_JIFFIES_SMALL) | |
661 | polling_jiffy = CM_JIFFIES_SMALL + 1; | |
662 | ||
663 | if (!keep_polling) | |
664 | polling_jiffy = ULONG_MAX; | |
665 | if (polling_jiffy == ULONG_MAX) | |
666 | goto out; | |
667 | ||
668 | WARN(cm_wq == NULL, "charger-manager: workqueue not initialized" | |
669 | ". try it later. %s\n", __func__); | |
670 | ||
2fbb520d TH |
671 | /* |
672 | * Use mod_delayed_work() iff the next polling interval should | |
673 | * occur before the currently scheduled one. If @cm_monitor_work | |
674 | * isn't active, the end result is the same, so no need to worry | |
675 | * about stale @next_polling. | |
676 | */ | |
d829dc75 CC |
677 | _next_polling = jiffies + polling_jiffy; |
678 | ||
2fbb520d | 679 | if (time_before(_next_polling, next_polling)) { |
41f63c53 | 680 | mod_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy); |
2fbb520d TH |
681 | next_polling = _next_polling; |
682 | } else { | |
683 | if (queue_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy)) | |
684 | next_polling = _next_polling; | |
d829dc75 | 685 | } |
d829dc75 CC |
686 | out: |
687 | mutex_unlock(&cm_list_mtx); | |
688 | } | |
689 | static DECLARE_WORK(setup_polling, _setup_polling); | |
690 | ||
691 | /** | |
692 | * cm_monitor_poller - The Monitor / Poller. | |
693 | * @work: work_struct of the function cm_monitor_poller | |
694 | * | |
695 | * During non-suspended state, cm_monitor_poller is used to poll and monitor | |
696 | * the batteries. | |
697 | */ | |
698 | static void cm_monitor_poller(struct work_struct *work) | |
699 | { | |
700 | cm_monitor(); | |
701 | schedule_work(&setup_polling); | |
702 | } | |
703 | ||
dfeccb12 CC |
704 | /** |
705 | * fullbatt_handler - Event handler for CM_EVENT_BATT_FULL | |
706 | * @cm: the Charger Manager representing the battery. | |
707 | */ | |
708 | static void fullbatt_handler(struct charger_manager *cm) | |
709 | { | |
710 | struct charger_desc *desc = cm->desc; | |
711 | ||
712 | if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms) | |
713 | goto out; | |
714 | ||
715 | if (cm_suspended) | |
716 | device_set_wakeup_capable(cm->dev, true); | |
717 | ||
41f63c53 TH |
718 | mod_delayed_work(cm_wq, &cm->fullbatt_vchk_work, |
719 | msecs_to_jiffies(desc->fullbatt_vchkdrop_ms)); | |
dfeccb12 CC |
720 | cm->fullbatt_vchk_jiffies_at = jiffies + msecs_to_jiffies( |
721 | desc->fullbatt_vchkdrop_ms); | |
722 | ||
723 | if (cm->fullbatt_vchk_jiffies_at == 0) | |
724 | cm->fullbatt_vchk_jiffies_at = 1; | |
725 | ||
726 | out: | |
e5409cbd | 727 | dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged\n"); |
dfeccb12 CC |
728 | uevent_notify(cm, default_event_names[CM_EVENT_BATT_FULL]); |
729 | } | |
730 | ||
731 | /** | |
732 | * battout_handler - Event handler for CM_EVENT_BATT_OUT | |
733 | * @cm: the Charger Manager representing the battery. | |
734 | */ | |
735 | static void battout_handler(struct charger_manager *cm) | |
736 | { | |
737 | if (cm_suspended) | |
738 | device_set_wakeup_capable(cm->dev, true); | |
739 | ||
740 | if (!is_batt_present(cm)) { | |
741 | dev_emerg(cm->dev, "Battery Pulled Out!\n"); | |
742 | uevent_notify(cm, default_event_names[CM_EVENT_BATT_OUT]); | |
743 | } else { | |
744 | uevent_notify(cm, "Battery Reinserted?"); | |
745 | } | |
746 | } | |
747 | ||
748 | /** | |
749 | * misc_event_handler - Handler for other evnets | |
750 | * @cm: the Charger Manager representing the battery. | |
751 | * @type: the Charger Manager representing the battery. | |
752 | */ | |
753 | static void misc_event_handler(struct charger_manager *cm, | |
754 | enum cm_event_types type) | |
755 | { | |
756 | if (cm_suspended) | |
757 | device_set_wakeup_capable(cm->dev, true); | |
758 | ||
2fbb520d | 759 | if (is_polling_required(cm) && cm->desc->polling_interval_ms) |
dfeccb12 CC |
760 | schedule_work(&setup_polling); |
761 | uevent_notify(cm, default_event_names[type]); | |
762 | } | |
763 | ||
ad3d13ee DK |
764 | static int charger_get_property(struct power_supply *psy, |
765 | enum power_supply_property psp, | |
766 | union power_supply_propval *val) | |
767 | { | |
768 | struct charger_manager *cm = container_of(psy, | |
769 | struct charger_manager, charger_psy); | |
770 | struct charger_desc *desc = cm->desc; | |
df58c04c AV |
771 | int ret = 0; |
772 | int uV; | |
ad3d13ee DK |
773 | |
774 | switch (psp) { | |
775 | case POWER_SUPPLY_PROP_STATUS: | |
776 | if (is_charging(cm)) | |
777 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
778 | else if (is_ext_pwr_online(cm)) | |
779 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
780 | else | |
781 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
782 | break; | |
783 | case POWER_SUPPLY_PROP_HEALTH: | |
784 | if (cm->emergency_stop > 0) | |
785 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
786 | else if (cm->emergency_stop < 0) | |
787 | val->intval = POWER_SUPPLY_HEALTH_COLD; | |
788 | else | |
789 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
790 | break; | |
791 | case POWER_SUPPLY_PROP_PRESENT: | |
792 | if (is_batt_present(cm)) | |
793 | val->intval = 1; | |
794 | else | |
795 | val->intval = 0; | |
796 | break; | |
797 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
df58c04c | 798 | ret = get_batt_uV(cm, &val->intval); |
ad3d13ee DK |
799 | break; |
800 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
801 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
802 | POWER_SUPPLY_PROP_CURRENT_NOW, val); | |
803 | break; | |
804 | case POWER_SUPPLY_PROP_TEMP: | |
805 | /* in thenth of centigrade */ | |
806 | if (cm->last_temp_mC == INT_MIN) | |
807 | desc->temperature_out_of_range(&cm->last_temp_mC); | |
808 | val->intval = cm->last_temp_mC / 100; | |
809 | if (!desc->measure_battery_temp) | |
810 | ret = -ENODEV; | |
811 | break; | |
812 | case POWER_SUPPLY_PROP_TEMP_AMBIENT: | |
813 | /* in thenth of centigrade */ | |
814 | if (cm->last_temp_mC == INT_MIN) | |
815 | desc->temperature_out_of_range(&cm->last_temp_mC); | |
816 | val->intval = cm->last_temp_mC / 100; | |
817 | if (desc->measure_battery_temp) | |
818 | ret = -ENODEV; | |
819 | break; | |
820 | case POWER_SUPPLY_PROP_CAPACITY: | |
821 | if (!cm->fuel_gauge) { | |
822 | ret = -ENODEV; | |
823 | break; | |
824 | } | |
825 | ||
826 | if (!is_batt_present(cm)) { | |
827 | /* There is no battery. Assume 100% */ | |
828 | val->intval = 100; | |
829 | break; | |
830 | } | |
831 | ||
832 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
833 | POWER_SUPPLY_PROP_CAPACITY, val); | |
834 | if (ret) | |
835 | break; | |
836 | ||
837 | if (val->intval > 100) { | |
838 | val->intval = 100; | |
839 | break; | |
840 | } | |
841 | if (val->intval < 0) | |
842 | val->intval = 0; | |
843 | ||
844 | /* Do not adjust SOC when charging: voltage is overrated */ | |
845 | if (is_charging(cm)) | |
846 | break; | |
847 | ||
848 | /* | |
849 | * If the capacity value is inconsistent, calibrate it base on | |
850 | * the battery voltage values and the thresholds given as desc | |
851 | */ | |
852 | ret = get_batt_uV(cm, &uV); | |
853 | if (ret) { | |
854 | /* Voltage information not available. No calibration */ | |
855 | ret = 0; | |
856 | break; | |
857 | } | |
858 | ||
859 | if (desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV && | |
860 | !is_charging(cm)) { | |
861 | val->intval = 100; | |
862 | break; | |
863 | } | |
864 | ||
865 | break; | |
866 | case POWER_SUPPLY_PROP_ONLINE: | |
867 | if (is_ext_pwr_online(cm)) | |
868 | val->intval = 1; | |
869 | else | |
870 | val->intval = 0; | |
871 | break; | |
872 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
2ed9e9b6 | 873 | if (is_full_charged(cm)) |
ad3d13ee | 874 | val->intval = 1; |
2ed9e9b6 CC |
875 | else |
876 | val->intval = 0; | |
ad3d13ee DK |
877 | ret = 0; |
878 | break; | |
879 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
880 | if (is_charging(cm)) { | |
881 | ret = cm->fuel_gauge->get_property(cm->fuel_gauge, | |
882 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
883 | val); | |
884 | if (ret) { | |
885 | val->intval = 1; | |
886 | ret = 0; | |
887 | } else { | |
888 | /* If CHARGE_NOW is supplied, use it */ | |
889 | val->intval = (val->intval > 0) ? | |
890 | val->intval : 1; | |
891 | } | |
892 | } else { | |
893 | val->intval = 0; | |
894 | } | |
895 | break; | |
896 | default: | |
897 | return -EINVAL; | |
898 | } | |
899 | return ret; | |
900 | } | |
901 | ||
902 | #define NUM_CHARGER_PSY_OPTIONAL (4) | |
903 | static enum power_supply_property default_charger_props[] = { | |
904 | /* Guaranteed to provide */ | |
905 | POWER_SUPPLY_PROP_STATUS, | |
906 | POWER_SUPPLY_PROP_HEALTH, | |
907 | POWER_SUPPLY_PROP_PRESENT, | |
908 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
909 | POWER_SUPPLY_PROP_CAPACITY, | |
910 | POWER_SUPPLY_PROP_ONLINE, | |
911 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
912 | /* | |
913 | * Optional properties are: | |
914 | * POWER_SUPPLY_PROP_CHARGE_NOW, | |
915 | * POWER_SUPPLY_PROP_CURRENT_NOW, | |
916 | * POWER_SUPPLY_PROP_TEMP, and | |
917 | * POWER_SUPPLY_PROP_TEMP_AMBIENT, | |
918 | */ | |
919 | }; | |
920 | ||
921 | static struct power_supply psy_default = { | |
922 | .name = "battery", | |
923 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
924 | .properties = default_charger_props, | |
925 | .num_properties = ARRAY_SIZE(default_charger_props), | |
926 | .get_property = charger_get_property, | |
927 | }; | |
928 | ||
3bb3dbbd DK |
929 | /** |
930 | * cm_setup_timer - For in-suspend monitoring setup wakeup alarm | |
931 | * for suspend_again. | |
932 | * | |
933 | * Returns true if the alarm is set for Charger Manager to use. | |
934 | * Returns false if | |
935 | * cm_setup_timer fails to set an alarm, | |
936 | * cm_setup_timer does not need to set an alarm for Charger Manager, | |
937 | * or an alarm previously configured is to be used. | |
938 | */ | |
939 | static bool cm_setup_timer(void) | |
940 | { | |
941 | struct charger_manager *cm; | |
942 | unsigned int wakeup_ms = UINT_MAX; | |
943 | bool ret = false; | |
944 | ||
945 | mutex_lock(&cm_list_mtx); | |
946 | ||
947 | list_for_each_entry(cm, &cm_list, entry) { | |
d829dc75 CC |
948 | unsigned int fbchk_ms = 0; |
949 | ||
950 | /* fullbatt_vchk is required. setup timer for that */ | |
951 | if (cm->fullbatt_vchk_jiffies_at) { | |
952 | fbchk_ms = jiffies_to_msecs(cm->fullbatt_vchk_jiffies_at | |
953 | - jiffies); | |
954 | if (time_is_before_eq_jiffies( | |
955 | cm->fullbatt_vchk_jiffies_at) || | |
956 | msecs_to_jiffies(fbchk_ms) < CM_JIFFIES_SMALL) { | |
957 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
958 | fbchk_ms = 0; | |
959 | } | |
960 | } | |
961 | CM_MIN_VALID(wakeup_ms, fbchk_ms); | |
962 | ||
3bb3dbbd DK |
963 | /* Skip if polling is not required for this CM */ |
964 | if (!is_polling_required(cm) && !cm->emergency_stop) | |
965 | continue; | |
966 | if (cm->desc->polling_interval_ms == 0) | |
967 | continue; | |
968 | CM_MIN_VALID(wakeup_ms, cm->desc->polling_interval_ms); | |
969 | } | |
970 | ||
971 | mutex_unlock(&cm_list_mtx); | |
972 | ||
973 | if (wakeup_ms < UINT_MAX && wakeup_ms > 0) { | |
e5409cbd | 974 | pr_info("Charger Manager wakeup timer: %u ms\n", wakeup_ms); |
3bb3dbbd DK |
975 | if (rtc_dev) { |
976 | struct rtc_wkalrm tmp; | |
977 | unsigned long time, now; | |
978 | unsigned long add = DIV_ROUND_UP(wakeup_ms, 1000); | |
979 | ||
980 | /* | |
981 | * Set alarm with the polling interval (wakeup_ms) | |
982 | * except when rtc_wkalarm_save comes first. | |
983 | * However, the alarm time should be NOW + | |
984 | * CM_RTC_SMALL or later. | |
985 | */ | |
986 | tmp.enabled = 1; | |
987 | rtc_read_time(rtc_dev, &tmp.time); | |
988 | rtc_tm_to_time(&tmp.time, &now); | |
989 | if (add < CM_RTC_SMALL) | |
990 | add = CM_RTC_SMALL; | |
991 | time = now + add; | |
992 | ||
993 | ret = true; | |
994 | ||
995 | if (rtc_wkalarm_save.enabled && | |
996 | rtc_wkalarm_save_time && | |
997 | rtc_wkalarm_save_time < time) { | |
998 | if (rtc_wkalarm_save_time < now + CM_RTC_SMALL) | |
999 | time = now + CM_RTC_SMALL; | |
1000 | else | |
1001 | time = rtc_wkalarm_save_time; | |
1002 | ||
1003 | /* The timer is not appointed by CM */ | |
1004 | ret = false; | |
1005 | } | |
1006 | ||
e5409cbd | 1007 | pr_info("Waking up after %lu secs\n", time - now); |
3bb3dbbd DK |
1008 | |
1009 | rtc_time_to_tm(time, &tmp.time); | |
1010 | rtc_set_alarm(rtc_dev, &tmp); | |
1011 | cm_suspend_duration_ms += wakeup_ms; | |
1012 | return ret; | |
1013 | } | |
1014 | } | |
1015 | ||
1016 | if (rtc_dev) | |
1017 | rtc_set_alarm(rtc_dev, &rtc_wkalarm_save); | |
1018 | return false; | |
1019 | } | |
1020 | ||
d829dc75 CC |
1021 | static void _cm_fbchk_in_suspend(struct charger_manager *cm) |
1022 | { | |
1023 | unsigned long jiffy_now = jiffies; | |
1024 | ||
1025 | if (!cm->fullbatt_vchk_jiffies_at) | |
1026 | return; | |
1027 | ||
1028 | if (g_desc && g_desc->assume_timer_stops_in_suspend) | |
1029 | jiffy_now += msecs_to_jiffies(cm_suspend_duration_ms); | |
1030 | ||
1031 | /* Execute now if it's going to be executed not too long after */ | |
1032 | jiffy_now += CM_JIFFIES_SMALL; | |
1033 | ||
1034 | if (time_after_eq(jiffy_now, cm->fullbatt_vchk_jiffies_at)) | |
1035 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
1036 | } | |
1037 | ||
3bb3dbbd DK |
1038 | /** |
1039 | * cm_suspend_again - Determine whether suspend again or not | |
1040 | * | |
1041 | * Returns true if the system should be suspended again | |
1042 | * Returns false if the system should be woken up | |
1043 | */ | |
1044 | bool cm_suspend_again(void) | |
1045 | { | |
1046 | struct charger_manager *cm; | |
1047 | bool ret = false; | |
1048 | ||
1049 | if (!g_desc || !g_desc->rtc_only_wakeup || !g_desc->rtc_only_wakeup() || | |
1050 | !cm_rtc_set) | |
1051 | return false; | |
1052 | ||
1053 | if (cm_monitor()) | |
1054 | goto out; | |
1055 | ||
1056 | ret = true; | |
1057 | mutex_lock(&cm_list_mtx); | |
1058 | list_for_each_entry(cm, &cm_list, entry) { | |
d829dc75 CC |
1059 | _cm_fbchk_in_suspend(cm); |
1060 | ||
3bb3dbbd | 1061 | if (cm->status_save_ext_pwr_inserted != is_ext_pwr_online(cm) || |
bb2a95c2 | 1062 | cm->status_save_batt != is_batt_present(cm)) { |
3bb3dbbd | 1063 | ret = false; |
bb2a95c2 AL |
1064 | break; |
1065 | } | |
3bb3dbbd DK |
1066 | } |
1067 | mutex_unlock(&cm_list_mtx); | |
1068 | ||
1069 | cm_rtc_set = cm_setup_timer(); | |
1070 | out: | |
1071 | /* It's about the time when the non-CM appointed timer goes off */ | |
1072 | if (rtc_wkalarm_save.enabled) { | |
1073 | unsigned long now; | |
1074 | struct rtc_time tmp; | |
1075 | ||
1076 | rtc_read_time(rtc_dev, &tmp); | |
1077 | rtc_tm_to_time(&tmp, &now); | |
1078 | ||
1079 | if (rtc_wkalarm_save_time && | |
1080 | now + CM_RTC_SMALL >= rtc_wkalarm_save_time) | |
1081 | return false; | |
1082 | } | |
1083 | return ret; | |
1084 | } | |
1085 | EXPORT_SYMBOL_GPL(cm_suspend_again); | |
1086 | ||
1087 | /** | |
1088 | * setup_charger_manager - initialize charger_global_desc data | |
1089 | * @gd: pointer to instance of charger_global_desc | |
1090 | */ | |
1091 | int setup_charger_manager(struct charger_global_desc *gd) | |
1092 | { | |
1093 | if (!gd) | |
1094 | return -EINVAL; | |
1095 | ||
1096 | if (rtc_dev) | |
1097 | rtc_class_close(rtc_dev); | |
1098 | rtc_dev = NULL; | |
1099 | g_desc = NULL; | |
1100 | ||
1101 | if (!gd->rtc_only_wakeup) { | |
e5409cbd | 1102 | pr_err("The callback rtc_only_wakeup is not given\n"); |
3bb3dbbd DK |
1103 | return -EINVAL; |
1104 | } | |
1105 | ||
1106 | if (gd->rtc_name) { | |
1107 | rtc_dev = rtc_class_open(gd->rtc_name); | |
1108 | if (IS_ERR_OR_NULL(rtc_dev)) { | |
1109 | rtc_dev = NULL; | |
1110 | /* Retry at probe. RTC may be not registered yet */ | |
1111 | } | |
1112 | } else { | |
e5409cbd | 1113 | pr_warn("No wakeup timer is given for charger manager. " |
3bb3dbbd DK |
1114 | "In-suspend monitoring won't work.\n"); |
1115 | } | |
1116 | ||
1117 | g_desc = gd; | |
1118 | return 0; | |
1119 | } | |
1120 | EXPORT_SYMBOL_GPL(setup_charger_manager); | |
1121 | ||
bee737bc CC |
1122 | /** |
1123 | * charger_extcon_work - enable/diable charger according to the state | |
1124 | * of charger cable | |
1125 | * | |
1126 | * @work: work_struct of the function charger_extcon_work. | |
1127 | */ | |
1128 | static void charger_extcon_work(struct work_struct *work) | |
1129 | { | |
1130 | struct charger_cable *cable = | |
1131 | container_of(work, struct charger_cable, wq); | |
45cd4fb2 CC |
1132 | int ret; |
1133 | ||
1134 | if (cable->attached && cable->min_uA != 0 && cable->max_uA != 0) { | |
1135 | ret = regulator_set_current_limit(cable->charger->consumer, | |
1136 | cable->min_uA, cable->max_uA); | |
1137 | if (ret < 0) { | |
1138 | pr_err("Cannot set current limit of %s (%s)\n", | |
e5409cbd | 1139 | cable->charger->regulator_name, cable->name); |
45cd4fb2 CC |
1140 | return; |
1141 | } | |
1142 | ||
1143 | pr_info("Set current limit of %s : %duA ~ %duA\n", | |
e5409cbd JP |
1144 | cable->charger->regulator_name, |
1145 | cable->min_uA, cable->max_uA); | |
45cd4fb2 | 1146 | } |
bee737bc CC |
1147 | |
1148 | try_charger_enable(cable->cm, cable->attached); | |
1149 | } | |
1150 | ||
1151 | /** | |
1152 | * charger_extcon_notifier - receive the state of charger cable | |
1153 | * when registered cable is attached or detached. | |
1154 | * | |
1155 | * @self: the notifier block of the charger_extcon_notifier. | |
1156 | * @event: the cable state. | |
1157 | * @ptr: the data pointer of notifier block. | |
1158 | */ | |
1159 | static int charger_extcon_notifier(struct notifier_block *self, | |
1160 | unsigned long event, void *ptr) | |
1161 | { | |
1162 | struct charger_cable *cable = | |
1163 | container_of(self, struct charger_cable, nb); | |
1164 | ||
2ed9e9b6 CC |
1165 | /* |
1166 | * The newly state of charger cable. | |
1167 | * If cable is attached, cable->attached is true. | |
1168 | */ | |
bee737bc | 1169 | cable->attached = event; |
2ed9e9b6 CC |
1170 | |
1171 | /* | |
1172 | * Setup monitoring to check battery state | |
1173 | * when charger cable is attached. | |
1174 | */ | |
1175 | if (cable->attached && is_polling_required(cable->cm)) { | |
2fbb520d | 1176 | cancel_work_sync(&setup_polling); |
2ed9e9b6 CC |
1177 | schedule_work(&setup_polling); |
1178 | } | |
1179 | ||
1180 | /* | |
1181 | * Setup work for controlling charger(regulator) | |
1182 | * according to charger cable. | |
1183 | */ | |
bee737bc CC |
1184 | schedule_work(&cable->wq); |
1185 | ||
1186 | return NOTIFY_DONE; | |
1187 | } | |
1188 | ||
1189 | /** | |
1190 | * charger_extcon_init - register external connector to use it | |
1191 | * as the charger cable | |
1192 | * | |
1193 | * @cm: the Charger Manager representing the battery. | |
1194 | * @cable: the Charger cable representing the external connector. | |
1195 | */ | |
1196 | static int charger_extcon_init(struct charger_manager *cm, | |
1197 | struct charger_cable *cable) | |
1198 | { | |
1199 | int ret = 0; | |
1200 | ||
1201 | /* | |
1202 | * Charger manager use Extcon framework to identify | |
1203 | * the charger cable among various external connector | |
1204 | * cable (e.g., TA, USB, MHL, Dock). | |
1205 | */ | |
1206 | INIT_WORK(&cable->wq, charger_extcon_work); | |
1207 | cable->nb.notifier_call = charger_extcon_notifier; | |
1208 | ret = extcon_register_interest(&cable->extcon_dev, | |
1209 | cable->extcon_name, cable->name, &cable->nb); | |
1210 | if (ret < 0) { | |
e5409cbd JP |
1211 | pr_info("Cannot register extcon_dev for %s(cable: %s)\n", |
1212 | cable->extcon_name, cable->name); | |
bee737bc CC |
1213 | ret = -EINVAL; |
1214 | } | |
1215 | ||
1216 | return ret; | |
1217 | } | |
1218 | ||
41468a11 CC |
1219 | /** |
1220 | * charger_manager_register_extcon - Register extcon device to recevie state | |
1221 | * of charger cable. | |
1222 | * @cm: the Charger Manager representing the battery. | |
1223 | * | |
1224 | * This function support EXTCON(External Connector) subsystem to detect the | |
1225 | * state of charger cables for enabling or disabling charger(regulator) and | |
1226 | * select the charger cable for charging among a number of external cable | |
1227 | * according to policy of H/W board. | |
1228 | */ | |
1229 | static int charger_manager_register_extcon(struct charger_manager *cm) | |
1230 | { | |
1231 | struct charger_desc *desc = cm->desc; | |
1232 | struct charger_regulator *charger; | |
1233 | int ret = 0; | |
1234 | int i; | |
1235 | int j; | |
1236 | ||
1237 | for (i = 0; i < desc->num_charger_regulators; i++) { | |
1238 | charger = &desc->charger_regulators[i]; | |
1239 | ||
1240 | charger->consumer = regulator_get(cm->dev, | |
1241 | charger->regulator_name); | |
5a6c2208 | 1242 | if (IS_ERR(charger->consumer)) { |
e5409cbd JP |
1243 | dev_err(cm->dev, "Cannot find charger(%s)\n", |
1244 | charger->regulator_name); | |
5a6c2208 | 1245 | return PTR_ERR(charger->consumer); |
41468a11 CC |
1246 | } |
1247 | charger->cm = cm; | |
1248 | ||
1249 | for (j = 0; j < charger->num_cables; j++) { | |
1250 | struct charger_cable *cable = &charger->cables[j]; | |
1251 | ||
1252 | ret = charger_extcon_init(cm, cable); | |
1253 | if (ret < 0) { | |
e5409cbd JP |
1254 | dev_err(cm->dev, "Cannot initialize charger(%s)\n", |
1255 | charger->regulator_name); | |
41468a11 CC |
1256 | goto err; |
1257 | } | |
1258 | cable->charger = charger; | |
1259 | cable->cm = cm; | |
1260 | } | |
1261 | } | |
1262 | ||
1263 | err: | |
1264 | return ret; | |
1265 | } | |
1266 | ||
3950c786 CC |
1267 | /* help function of sysfs node to control charger(regulator) */ |
1268 | static ssize_t charger_name_show(struct device *dev, | |
1269 | struct device_attribute *attr, char *buf) | |
1270 | { | |
1271 | struct charger_regulator *charger | |
1272 | = container_of(attr, struct charger_regulator, attr_name); | |
1273 | ||
1274 | return sprintf(buf, "%s\n", charger->regulator_name); | |
1275 | } | |
1276 | ||
1277 | static ssize_t charger_state_show(struct device *dev, | |
1278 | struct device_attribute *attr, char *buf) | |
1279 | { | |
1280 | struct charger_regulator *charger | |
1281 | = container_of(attr, struct charger_regulator, attr_state); | |
1282 | int state = 0; | |
1283 | ||
1284 | if (!charger->externally_control) | |
1285 | state = regulator_is_enabled(charger->consumer); | |
1286 | ||
1287 | return sprintf(buf, "%s\n", state ? "enabled" : "disabled"); | |
1288 | } | |
1289 | ||
1290 | static ssize_t charger_externally_control_show(struct device *dev, | |
1291 | struct device_attribute *attr, char *buf) | |
1292 | { | |
1293 | struct charger_regulator *charger = container_of(attr, | |
1294 | struct charger_regulator, attr_externally_control); | |
1295 | ||
1296 | return sprintf(buf, "%d\n", charger->externally_control); | |
1297 | } | |
1298 | ||
1299 | static ssize_t charger_externally_control_store(struct device *dev, | |
1300 | struct device_attribute *attr, const char *buf, | |
1301 | size_t count) | |
1302 | { | |
1303 | struct charger_regulator *charger | |
1304 | = container_of(attr, struct charger_regulator, | |
1305 | attr_externally_control); | |
1306 | struct charger_manager *cm = charger->cm; | |
1307 | struct charger_desc *desc = cm->desc; | |
1308 | int i; | |
1309 | int ret; | |
1310 | int externally_control; | |
1311 | int chargers_externally_control = 1; | |
1312 | ||
1313 | ret = sscanf(buf, "%d", &externally_control); | |
1314 | if (ret == 0) { | |
1315 | ret = -EINVAL; | |
1316 | return ret; | |
1317 | } | |
1318 | ||
1319 | if (!externally_control) { | |
1320 | charger->externally_control = 0; | |
1321 | return count; | |
1322 | } | |
1323 | ||
1324 | for (i = 0; i < desc->num_charger_regulators; i++) { | |
1325 | if (&desc->charger_regulators[i] != charger && | |
41468a11 | 1326 | !desc->charger_regulators[i].externally_control) { |
3950c786 CC |
1327 | /* |
1328 | * At least, one charger is controlled by | |
1329 | * charger-manager | |
1330 | */ | |
1331 | chargers_externally_control = 0; | |
1332 | break; | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | if (!chargers_externally_control) { | |
1337 | if (cm->charger_enabled) { | |
1338 | try_charger_enable(charger->cm, false); | |
1339 | charger->externally_control = externally_control; | |
1340 | try_charger_enable(charger->cm, true); | |
1341 | } else { | |
1342 | charger->externally_control = externally_control; | |
1343 | } | |
1344 | } else { | |
1345 | dev_warn(cm->dev, | |
e5409cbd JP |
1346 | "'%s' regulator should be controlled in charger-manager because charger-manager must need at least one charger for charging\n", |
1347 | charger->regulator_name); | |
3950c786 CC |
1348 | } |
1349 | ||
1350 | return count; | |
1351 | } | |
1352 | ||
41468a11 CC |
1353 | /** |
1354 | * charger_manager_register_sysfs - Register sysfs entry for each charger | |
1355 | * @cm: the Charger Manager representing the battery. | |
1356 | * | |
1357 | * This function add sysfs entry for charger(regulator) to control charger from | |
1358 | * user-space. If some development board use one more chargers for charging | |
1359 | * but only need one charger on specific case which is dependent on user | |
1360 | * scenario or hardware restrictions, the user enter 1 or 0(zero) to '/sys/ | |
1361 | * class/power_supply/battery/charger.[index]/externally_control'. For example, | |
1362 | * if user enter 1 to 'sys/class/power_supply/battery/charger.[index]/ | |
1363 | * externally_control, this charger isn't controlled from charger-manager and | |
1364 | * always stay off state of regulator. | |
1365 | */ | |
1366 | static int charger_manager_register_sysfs(struct charger_manager *cm) | |
1367 | { | |
1368 | struct charger_desc *desc = cm->desc; | |
1369 | struct charger_regulator *charger; | |
1370 | int chargers_externally_control = 1; | |
1371 | char buf[11]; | |
1372 | char *str; | |
1373 | int ret = 0; | |
1374 | int i; | |
1375 | ||
1376 | /* Create sysfs entry to control charger(regulator) */ | |
1377 | for (i = 0; i < desc->num_charger_regulators; i++) { | |
1378 | charger = &desc->charger_regulators[i]; | |
1379 | ||
1380 | snprintf(buf, 10, "charger.%d", i); | |
1381 | str = kzalloc(sizeof(char) * (strlen(buf) + 1), GFP_KERNEL); | |
1382 | if (!str) { | |
41468a11 CC |
1383 | ret = -ENOMEM; |
1384 | goto err; | |
1385 | } | |
1386 | strcpy(str, buf); | |
1387 | ||
1388 | charger->attrs[0] = &charger->attr_name.attr; | |
1389 | charger->attrs[1] = &charger->attr_state.attr; | |
1390 | charger->attrs[2] = &charger->attr_externally_control.attr; | |
1391 | charger->attrs[3] = NULL; | |
1392 | charger->attr_g.name = str; | |
1393 | charger->attr_g.attrs = charger->attrs; | |
1394 | ||
1395 | sysfs_attr_init(&charger->attr_name.attr); | |
1396 | charger->attr_name.attr.name = "name"; | |
1397 | charger->attr_name.attr.mode = 0444; | |
1398 | charger->attr_name.show = charger_name_show; | |
1399 | ||
1400 | sysfs_attr_init(&charger->attr_state.attr); | |
1401 | charger->attr_state.attr.name = "state"; | |
1402 | charger->attr_state.attr.mode = 0444; | |
1403 | charger->attr_state.show = charger_state_show; | |
1404 | ||
1405 | sysfs_attr_init(&charger->attr_externally_control.attr); | |
1406 | charger->attr_externally_control.attr.name | |
1407 | = "externally_control"; | |
1408 | charger->attr_externally_control.attr.mode = 0644; | |
1409 | charger->attr_externally_control.show | |
1410 | = charger_externally_control_show; | |
1411 | charger->attr_externally_control.store | |
1412 | = charger_externally_control_store; | |
1413 | ||
1414 | if (!desc->charger_regulators[i].externally_control || | |
1415 | !chargers_externally_control) | |
1416 | chargers_externally_control = 0; | |
1417 | ||
e5409cbd JP |
1418 | dev_info(cm->dev, "'%s' regulator's externally_control is %d\n", |
1419 | charger->regulator_name, charger->externally_control); | |
41468a11 CC |
1420 | |
1421 | ret = sysfs_create_group(&cm->charger_psy.dev->kobj, | |
1422 | &charger->attr_g); | |
1423 | if (ret < 0) { | |
e5409cbd JP |
1424 | dev_err(cm->dev, "Cannot create sysfs entry of %s regulator\n", |
1425 | charger->regulator_name); | |
41468a11 CC |
1426 | ret = -EINVAL; |
1427 | goto err; | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | if (chargers_externally_control) { | |
e5409cbd | 1432 | dev_err(cm->dev, "Cannot register regulator because charger-manager must need at least one charger for charging battery\n"); |
41468a11 CC |
1433 | ret = -EINVAL; |
1434 | goto err; | |
1435 | } | |
1436 | ||
1437 | err: | |
1438 | return ret; | |
1439 | } | |
1440 | ||
3bb3dbbd DK |
1441 | static int charger_manager_probe(struct platform_device *pdev) |
1442 | { | |
1443 | struct charger_desc *desc = dev_get_platdata(&pdev->dev); | |
1444 | struct charger_manager *cm; | |
1445 | int ret = 0, i = 0; | |
bee737bc | 1446 | int j = 0; |
ad3d13ee | 1447 | union power_supply_propval val; |
3bb3dbbd DK |
1448 | |
1449 | if (g_desc && !rtc_dev && g_desc->rtc_name) { | |
1450 | rtc_dev = rtc_class_open(g_desc->rtc_name); | |
1451 | if (IS_ERR_OR_NULL(rtc_dev)) { | |
1452 | rtc_dev = NULL; | |
e5409cbd | 1453 | dev_err(&pdev->dev, "Cannot get RTC %s\n", |
3bb3dbbd DK |
1454 | g_desc->rtc_name); |
1455 | ret = -ENODEV; | |
1456 | goto err_alloc; | |
1457 | } | |
1458 | } | |
1459 | ||
1460 | if (!desc) { | |
e5409cbd | 1461 | dev_err(&pdev->dev, "No platform data (desc) found\n"); |
3bb3dbbd DK |
1462 | ret = -ENODEV; |
1463 | goto err_alloc; | |
1464 | } | |
1465 | ||
1466 | cm = kzalloc(sizeof(struct charger_manager), GFP_KERNEL); | |
1467 | if (!cm) { | |
3bb3dbbd DK |
1468 | ret = -ENOMEM; |
1469 | goto err_alloc; | |
1470 | } | |
1471 | ||
1472 | /* Basic Values. Unspecified are Null or 0 */ | |
1473 | cm->dev = &pdev->dev; | |
f2c6a5fb | 1474 | cm->desc = kmemdup(desc, sizeof(struct charger_desc), GFP_KERNEL); |
3bb3dbbd | 1475 | if (!cm->desc) { |
3bb3dbbd DK |
1476 | ret = -ENOMEM; |
1477 | goto err_alloc_desc; | |
1478 | } | |
3bb3dbbd DK |
1479 | cm->last_temp_mC = INT_MIN; /* denotes "unmeasured, yet" */ |
1480 | ||
d829dc75 CC |
1481 | /* |
1482 | * The following two do not need to be errors. | |
1483 | * Users may intentionally ignore those two features. | |
1484 | */ | |
1485 | if (desc->fullbatt_uV == 0) { | |
e5409cbd | 1486 | dev_info(&pdev->dev, "Ignoring full-battery voltage threshold as it is not supplied\n"); |
d829dc75 CC |
1487 | } |
1488 | if (!desc->fullbatt_vchkdrop_ms || !desc->fullbatt_vchkdrop_uV) { | |
e5409cbd | 1489 | dev_info(&pdev->dev, "Disabling full-battery voltage drop checking mechanism as it is not supplied\n"); |
d829dc75 CC |
1490 | desc->fullbatt_vchkdrop_ms = 0; |
1491 | desc->fullbatt_vchkdrop_uV = 0; | |
1492 | } | |
2ed9e9b6 | 1493 | if (desc->fullbatt_soc == 0) { |
e5409cbd | 1494 | dev_info(&pdev->dev, "Ignoring full-battery soc(state of charge) threshold as it is not supplied\n"); |
2ed9e9b6 CC |
1495 | } |
1496 | if (desc->fullbatt_full_capacity == 0) { | |
e5409cbd | 1497 | dev_info(&pdev->dev, "Ignoring full-battery full capacity threshold as it is not supplied\n"); |
2ed9e9b6 | 1498 | } |
d829dc75 | 1499 | |
3bb3dbbd DK |
1500 | if (!desc->charger_regulators || desc->num_charger_regulators < 1) { |
1501 | ret = -EINVAL; | |
e5409cbd | 1502 | dev_err(&pdev->dev, "charger_regulators undefined\n"); |
3bb3dbbd DK |
1503 | goto err_no_charger; |
1504 | } | |
1505 | ||
1506 | if (!desc->psy_charger_stat || !desc->psy_charger_stat[0]) { | |
e5409cbd | 1507 | dev_err(&pdev->dev, "No power supply defined\n"); |
3bb3dbbd DK |
1508 | ret = -EINVAL; |
1509 | goto err_no_charger_stat; | |
1510 | } | |
1511 | ||
1512 | /* Counting index only */ | |
1513 | while (desc->psy_charger_stat[i]) | |
1514 | i++; | |
1515 | ||
1516 | cm->charger_stat = kzalloc(sizeof(struct power_supply *) * (i + 1), | |
1517 | GFP_KERNEL); | |
1518 | if (!cm->charger_stat) { | |
1519 | ret = -ENOMEM; | |
1520 | goto err_no_charger_stat; | |
1521 | } | |
1522 | ||
1523 | for (i = 0; desc->psy_charger_stat[i]; i++) { | |
1524 | cm->charger_stat[i] = power_supply_get_by_name( | |
1525 | desc->psy_charger_stat[i]); | |
1526 | if (!cm->charger_stat[i]) { | |
e5409cbd JP |
1527 | dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n", |
1528 | desc->psy_charger_stat[i]); | |
3bb3dbbd DK |
1529 | ret = -ENODEV; |
1530 | goto err_chg_stat; | |
1531 | } | |
1532 | } | |
1533 | ||
1534 | cm->fuel_gauge = power_supply_get_by_name(desc->psy_fuel_gauge); | |
1535 | if (!cm->fuel_gauge) { | |
1536 | dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n", | |
e5409cbd | 1537 | desc->psy_fuel_gauge); |
3bb3dbbd DK |
1538 | ret = -ENODEV; |
1539 | goto err_chg_stat; | |
1540 | } | |
1541 | ||
1542 | if (desc->polling_interval_ms == 0 || | |
1543 | msecs_to_jiffies(desc->polling_interval_ms) <= CM_JIFFIES_SMALL) { | |
1544 | dev_err(&pdev->dev, "polling_interval_ms is too small\n"); | |
1545 | ret = -EINVAL; | |
1546 | goto err_chg_stat; | |
1547 | } | |
1548 | ||
1549 | if (!desc->temperature_out_of_range) { | |
1550 | dev_err(&pdev->dev, "there is no temperature_out_of_range\n"); | |
1551 | ret = -EINVAL; | |
1552 | goto err_chg_stat; | |
1553 | } | |
1554 | ||
8fcfe088 CC |
1555 | if (!desc->charging_max_duration_ms || |
1556 | !desc->discharging_max_duration_ms) { | |
e5409cbd | 1557 | dev_info(&pdev->dev, "Cannot limit charging duration checking mechanism to prevent overcharge/overheat and control discharging duration\n"); |
8fcfe088 CC |
1558 | desc->charging_max_duration_ms = 0; |
1559 | desc->discharging_max_duration_ms = 0; | |
1560 | } | |
1561 | ||
3bb3dbbd DK |
1562 | platform_set_drvdata(pdev, cm); |
1563 | ||
bb2a95c2 AL |
1564 | memcpy(&cm->charger_psy, &psy_default, sizeof(psy_default)); |
1565 | ||
41468a11 | 1566 | if (!desc->psy_name) |
bb2a95c2 | 1567 | strncpy(cm->psy_name_buf, psy_default.name, PSY_NAME_MAX); |
41468a11 | 1568 | else |
ad3d13ee | 1569 | strncpy(cm->psy_name_buf, desc->psy_name, PSY_NAME_MAX); |
ad3d13ee DK |
1570 | cm->charger_psy.name = cm->psy_name_buf; |
1571 | ||
1572 | /* Allocate for psy properties because they may vary */ | |
1573 | cm->charger_psy.properties = kzalloc(sizeof(enum power_supply_property) | |
1574 | * (ARRAY_SIZE(default_charger_props) + | |
1575 | NUM_CHARGER_PSY_OPTIONAL), | |
1576 | GFP_KERNEL); | |
1577 | if (!cm->charger_psy.properties) { | |
ad3d13ee DK |
1578 | ret = -ENOMEM; |
1579 | goto err_chg_stat; | |
1580 | } | |
1581 | memcpy(cm->charger_psy.properties, default_charger_props, | |
1582 | sizeof(enum power_supply_property) * | |
1583 | ARRAY_SIZE(default_charger_props)); | |
1584 | cm->charger_psy.num_properties = psy_default.num_properties; | |
1585 | ||
1586 | /* Find which optional psy-properties are available */ | |
1587 | if (!cm->fuel_gauge->get_property(cm->fuel_gauge, | |
1588 | POWER_SUPPLY_PROP_CHARGE_NOW, &val)) { | |
1589 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1590 | POWER_SUPPLY_PROP_CHARGE_NOW; | |
1591 | cm->charger_psy.num_properties++; | |
1592 | } | |
1593 | if (!cm->fuel_gauge->get_property(cm->fuel_gauge, | |
1594 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
1595 | &val)) { | |
1596 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1597 | POWER_SUPPLY_PROP_CURRENT_NOW; | |
1598 | cm->charger_psy.num_properties++; | |
1599 | } | |
bb2a95c2 | 1600 | |
ad3d13ee DK |
1601 | if (desc->measure_battery_temp) { |
1602 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1603 | POWER_SUPPLY_PROP_TEMP; | |
1604 | cm->charger_psy.num_properties++; | |
bb2a95c2 AL |
1605 | } else { |
1606 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1607 | POWER_SUPPLY_PROP_TEMP_AMBIENT; | |
1608 | cm->charger_psy.num_properties++; | |
ad3d13ee DK |
1609 | } |
1610 | ||
d829dc75 CC |
1611 | INIT_DELAYED_WORK(&cm->fullbatt_vchk_work, fullbatt_vchk); |
1612 | ||
ad3d13ee DK |
1613 | ret = power_supply_register(NULL, &cm->charger_psy); |
1614 | if (ret) { | |
e5409cbd JP |
1615 | dev_err(&pdev->dev, "Cannot register charger-manager with name \"%s\"\n", |
1616 | cm->charger_psy.name); | |
ad3d13ee DK |
1617 | goto err_register; |
1618 | } | |
1619 | ||
41468a11 CC |
1620 | /* Register extcon device for charger cable */ |
1621 | ret = charger_manager_register_extcon(cm); | |
1622 | if (ret < 0) { | |
1623 | dev_err(&pdev->dev, "Cannot initialize extcon device\n"); | |
1624 | goto err_reg_extcon; | |
3bb3dbbd DK |
1625 | } |
1626 | ||
41468a11 CC |
1627 | /* Register sysfs entry for charger(regulator) */ |
1628 | ret = charger_manager_register_sysfs(cm); | |
1629 | if (ret < 0) { | |
1630 | dev_err(&pdev->dev, | |
1631 | "Cannot initialize sysfs entry of regulator\n"); | |
1632 | goto err_reg_sysfs; | |
3bb3dbbd DK |
1633 | } |
1634 | ||
1635 | /* Add to the list */ | |
1636 | mutex_lock(&cm_list_mtx); | |
1637 | list_add(&cm->entry, &cm_list); | |
1638 | mutex_unlock(&cm_list_mtx); | |
1639 | ||
dfeccb12 CC |
1640 | /* |
1641 | * Charger-manager is capable of waking up the systme from sleep | |
1642 | * when event is happend through cm_notify_event() | |
1643 | */ | |
1644 | device_init_wakeup(&pdev->dev, true); | |
1645 | device_set_wakeup_capable(&pdev->dev, false); | |
1646 | ||
d829dc75 CC |
1647 | schedule_work(&setup_polling); |
1648 | ||
3bb3dbbd DK |
1649 | return 0; |
1650 | ||
41468a11 | 1651 | err_reg_sysfs: |
3950c786 CC |
1652 | for (i = 0; i < desc->num_charger_regulators; i++) { |
1653 | struct charger_regulator *charger; | |
1654 | ||
1655 | charger = &desc->charger_regulators[i]; | |
1656 | sysfs_remove_group(&cm->charger_psy.dev->kobj, | |
1657 | &charger->attr_g); | |
41468a11 | 1658 | |
3950c786 CC |
1659 | kfree(charger->attr_g.name); |
1660 | } | |
41468a11 CC |
1661 | err_reg_extcon: |
1662 | for (i = 0; i < desc->num_charger_regulators; i++) { | |
1663 | struct charger_regulator *charger; | |
1664 | ||
1665 | charger = &desc->charger_regulators[i]; | |
1666 | for (j = 0; j < charger->num_cables; j++) { | |
bee737bc | 1667 | struct charger_cable *cable = &charger->cables[j]; |
3cc9d269 JL |
1668 | /* Remove notifier block if only edev exists */ |
1669 | if (cable->extcon_dev.edev) | |
1670 | extcon_unregister_interest(&cable->extcon_dev); | |
bee737bc | 1671 | } |
41468a11 | 1672 | |
bee737bc | 1673 | regulator_put(desc->charger_regulators[i].consumer); |
41468a11 | 1674 | } |
bee737bc | 1675 | |
ad3d13ee DK |
1676 | power_supply_unregister(&cm->charger_psy); |
1677 | err_register: | |
1678 | kfree(cm->charger_psy.properties); | |
3bb3dbbd DK |
1679 | err_chg_stat: |
1680 | kfree(cm->charger_stat); | |
1681 | err_no_charger_stat: | |
1682 | err_no_charger: | |
1683 | kfree(cm->desc); | |
1684 | err_alloc_desc: | |
1685 | kfree(cm); | |
1686 | err_alloc: | |
1687 | return ret; | |
1688 | } | |
1689 | ||
415ec69f | 1690 | static int charger_manager_remove(struct platform_device *pdev) |
3bb3dbbd DK |
1691 | { |
1692 | struct charger_manager *cm = platform_get_drvdata(pdev); | |
1693 | struct charger_desc *desc = cm->desc; | |
bee737bc CC |
1694 | int i = 0; |
1695 | int j = 0; | |
3bb3dbbd DK |
1696 | |
1697 | /* Remove from the list */ | |
1698 | mutex_lock(&cm_list_mtx); | |
1699 | list_del(&cm->entry); | |
1700 | mutex_unlock(&cm_list_mtx); | |
1701 | ||
2fbb520d TH |
1702 | cancel_work_sync(&setup_polling); |
1703 | cancel_delayed_work_sync(&cm_monitor_work); | |
d829dc75 | 1704 | |
bee737bc CC |
1705 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
1706 | struct charger_regulator *charger | |
1707 | = &desc->charger_regulators[i]; | |
1708 | for (j = 0 ; j < charger->num_cables ; j++) { | |
1709 | struct charger_cable *cable = &charger->cables[j]; | |
1710 | extcon_unregister_interest(&cable->extcon_dev); | |
1711 | } | |
1712 | } | |
1713 | ||
1714 | for (i = 0 ; i < desc->num_charger_regulators ; i++) | |
1715 | regulator_put(desc->charger_regulators[i].consumer); | |
1716 | ||
ad3d13ee | 1717 | power_supply_unregister(&cm->charger_psy); |
d829dc75 CC |
1718 | |
1719 | try_charger_enable(cm, false); | |
1720 | ||
ad3d13ee | 1721 | kfree(cm->charger_psy.properties); |
3bb3dbbd DK |
1722 | kfree(cm->charger_stat); |
1723 | kfree(cm->desc); | |
1724 | kfree(cm); | |
1725 | ||
1726 | return 0; | |
1727 | } | |
1728 | ||
1bbe24d4 | 1729 | static const struct platform_device_id charger_manager_id[] = { |
3bb3dbbd DK |
1730 | { "charger-manager", 0 }, |
1731 | { }, | |
1732 | }; | |
1bbe24d4 | 1733 | MODULE_DEVICE_TABLE(platform, charger_manager_id); |
3bb3dbbd | 1734 | |
dfeccb12 CC |
1735 | static int cm_suspend_noirq(struct device *dev) |
1736 | { | |
1737 | int ret = 0; | |
1738 | ||
1739 | if (device_may_wakeup(dev)) { | |
1740 | device_set_wakeup_capable(dev, false); | |
1741 | ret = -EAGAIN; | |
1742 | } | |
1743 | ||
1744 | return ret; | |
1745 | } | |
1746 | ||
3bb3dbbd DK |
1747 | static int cm_suspend_prepare(struct device *dev) |
1748 | { | |
bb2a95c2 | 1749 | struct charger_manager *cm = dev_get_drvdata(dev); |
3bb3dbbd DK |
1750 | |
1751 | if (!cm_suspended) { | |
1752 | if (rtc_dev) { | |
1753 | struct rtc_time tmp; | |
1754 | unsigned long now; | |
1755 | ||
1756 | rtc_read_alarm(rtc_dev, &rtc_wkalarm_save); | |
1757 | rtc_read_time(rtc_dev, &tmp); | |
1758 | ||
1759 | if (rtc_wkalarm_save.enabled) { | |
1760 | rtc_tm_to_time(&rtc_wkalarm_save.time, | |
1761 | &rtc_wkalarm_save_time); | |
1762 | rtc_tm_to_time(&tmp, &now); | |
1763 | if (now > rtc_wkalarm_save_time) | |
1764 | rtc_wkalarm_save_time = 0; | |
1765 | } else { | |
1766 | rtc_wkalarm_save_time = 0; | |
1767 | } | |
1768 | } | |
1769 | cm_suspended = true; | |
1770 | } | |
1771 | ||
2fbb520d | 1772 | cancel_delayed_work(&cm->fullbatt_vchk_work); |
3bb3dbbd DK |
1773 | cm->status_save_ext_pwr_inserted = is_ext_pwr_online(cm); |
1774 | cm->status_save_batt = is_batt_present(cm); | |
1775 | ||
1776 | if (!cm_rtc_set) { | |
1777 | cm_suspend_duration_ms = 0; | |
1778 | cm_rtc_set = cm_setup_timer(); | |
1779 | } | |
1780 | ||
1781 | return 0; | |
1782 | } | |
1783 | ||
1784 | static void cm_suspend_complete(struct device *dev) | |
1785 | { | |
bb2a95c2 | 1786 | struct charger_manager *cm = dev_get_drvdata(dev); |
3bb3dbbd DK |
1787 | |
1788 | if (cm_suspended) { | |
1789 | if (rtc_dev) { | |
1790 | struct rtc_wkalrm tmp; | |
1791 | ||
1792 | rtc_read_alarm(rtc_dev, &tmp); | |
1793 | rtc_wkalarm_save.pending = tmp.pending; | |
1794 | rtc_set_alarm(rtc_dev, &rtc_wkalarm_save); | |
1795 | } | |
1796 | cm_suspended = false; | |
1797 | cm_rtc_set = false; | |
1798 | } | |
1799 | ||
d829dc75 CC |
1800 | /* Re-enqueue delayed work (fullbatt_vchk_work) */ |
1801 | if (cm->fullbatt_vchk_jiffies_at) { | |
1802 | unsigned long delay = 0; | |
1803 | unsigned long now = jiffies + CM_JIFFIES_SMALL; | |
1804 | ||
1805 | if (time_after_eq(now, cm->fullbatt_vchk_jiffies_at)) { | |
1806 | delay = (unsigned long)((long)now | |
1807 | - (long)(cm->fullbatt_vchk_jiffies_at)); | |
1808 | delay = jiffies_to_msecs(delay); | |
1809 | } else { | |
1810 | delay = 0; | |
1811 | } | |
1812 | ||
1813 | /* | |
1814 | * Account for cm_suspend_duration_ms if | |
1815 | * assume_timer_stops_in_suspend is active | |
1816 | */ | |
1817 | if (g_desc && g_desc->assume_timer_stops_in_suspend) { | |
1818 | if (delay > cm_suspend_duration_ms) | |
1819 | delay -= cm_suspend_duration_ms; | |
1820 | else | |
1821 | delay = 0; | |
1822 | } | |
1823 | ||
1824 | queue_delayed_work(cm_wq, &cm->fullbatt_vchk_work, | |
1825 | msecs_to_jiffies(delay)); | |
1826 | } | |
dfeccb12 | 1827 | device_set_wakeup_capable(cm->dev, false); |
3bb3dbbd DK |
1828 | uevent_notify(cm, NULL); |
1829 | } | |
1830 | ||
1831 | static const struct dev_pm_ops charger_manager_pm = { | |
1832 | .prepare = cm_suspend_prepare, | |
dfeccb12 | 1833 | .suspend_noirq = cm_suspend_noirq, |
3bb3dbbd DK |
1834 | .complete = cm_suspend_complete, |
1835 | }; | |
1836 | ||
1837 | static struct platform_driver charger_manager_driver = { | |
1838 | .driver = { | |
1839 | .name = "charger-manager", | |
1840 | .owner = THIS_MODULE, | |
1841 | .pm = &charger_manager_pm, | |
1842 | }, | |
1843 | .probe = charger_manager_probe, | |
28ea73f4 | 1844 | .remove = charger_manager_remove, |
3bb3dbbd DK |
1845 | .id_table = charger_manager_id, |
1846 | }; | |
1847 | ||
1848 | static int __init charger_manager_init(void) | |
1849 | { | |
d829dc75 CC |
1850 | cm_wq = create_freezable_workqueue("charger_manager"); |
1851 | INIT_DELAYED_WORK(&cm_monitor_work, cm_monitor_poller); | |
1852 | ||
3bb3dbbd DK |
1853 | return platform_driver_register(&charger_manager_driver); |
1854 | } | |
1855 | late_initcall(charger_manager_init); | |
1856 | ||
1857 | static void __exit charger_manager_cleanup(void) | |
1858 | { | |
d829dc75 CC |
1859 | destroy_workqueue(cm_wq); |
1860 | cm_wq = NULL; | |
1861 | ||
3bb3dbbd DK |
1862 | platform_driver_unregister(&charger_manager_driver); |
1863 | } | |
1864 | module_exit(charger_manager_cleanup); | |
1865 | ||
dfeccb12 CC |
1866 | /** |
1867 | * find_power_supply - find the associated power_supply of charger | |
1868 | * @cm: the Charger Manager representing the battery | |
1869 | * @psy: pointer to instance of charger's power_supply | |
1870 | */ | |
1871 | static bool find_power_supply(struct charger_manager *cm, | |
1872 | struct power_supply *psy) | |
1873 | { | |
1874 | int i; | |
1875 | bool found = false; | |
1876 | ||
1877 | for (i = 0; cm->charger_stat[i]; i++) { | |
1878 | if (psy == cm->charger_stat[i]) { | |
1879 | found = true; | |
1880 | break; | |
1881 | } | |
1882 | } | |
1883 | ||
1884 | return found; | |
1885 | } | |
1886 | ||
1887 | /** | |
1888 | * cm_notify_event - charger driver notify Charger Manager of charger event | |
1889 | * @psy: pointer to instance of charger's power_supply | |
1890 | * @type: type of charger event | |
1891 | * @msg: optional message passed to uevent_notify fuction | |
1892 | */ | |
1893 | void cm_notify_event(struct power_supply *psy, enum cm_event_types type, | |
1894 | char *msg) | |
1895 | { | |
1896 | struct charger_manager *cm; | |
1897 | bool found_power_supply = false; | |
1898 | ||
1899 | if (psy == NULL) | |
1900 | return; | |
1901 | ||
1902 | mutex_lock(&cm_list_mtx); | |
1903 | list_for_each_entry(cm, &cm_list, entry) { | |
1904 | found_power_supply = find_power_supply(cm, psy); | |
1905 | if (found_power_supply) | |
1906 | break; | |
1907 | } | |
1908 | mutex_unlock(&cm_list_mtx); | |
1909 | ||
1910 | if (!found_power_supply) | |
1911 | return; | |
1912 | ||
1913 | switch (type) { | |
1914 | case CM_EVENT_BATT_FULL: | |
1915 | fullbatt_handler(cm); | |
1916 | break; | |
1917 | case CM_EVENT_BATT_OUT: | |
1918 | battout_handler(cm); | |
1919 | break; | |
1920 | case CM_EVENT_BATT_IN: | |
1921 | case CM_EVENT_EXT_PWR_IN_OUT ... CM_EVENT_CHG_START_STOP: | |
1922 | misc_event_handler(cm, type); | |
1923 | break; | |
1924 | case CM_EVENT_UNKNOWN: | |
1925 | case CM_EVENT_OTHERS: | |
1926 | uevent_notify(cm, msg ? msg : default_event_names[type]); | |
1927 | break; | |
1928 | default: | |
e5409cbd | 1929 | dev_err(cm->dev, "%s: type not specified\n", __func__); |
dfeccb12 CC |
1930 | break; |
1931 | } | |
1932 | } | |
1933 | EXPORT_SYMBOL_GPL(cm_notify_event); | |
1934 | ||
3bb3dbbd DK |
1935 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); |
1936 | MODULE_DESCRIPTION("Charger Manager"); | |
1937 | MODULE_LICENSE("GPL"); |