blob: 526e5c9312945bdf480f57a4673b478d22250be8 [file] [log] [blame]
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001/*
2 * Copyright (C) 2011 Samsung Electronics Co., Ltd.
3 * MyungJoo Ham <myungjoo.ham@samsung.com>
4 *
5 * This driver enables to monitor battery health and control charger
6 * during suspend-to-mem.
7 * Charger manager depends on other devices. register this later than
8 * the depending devices.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13**/
14
15#include <linux/io.h>
16#include <linux/module.h>
17#include <linux/irq.h>
18#include <linux/interrupt.h>
19#include <linux/rtc.h>
20#include <linux/slab.h>
21#include <linux/workqueue.h>
22#include <linux/platform_device.h>
23#include <linux/power/charger-manager.h>
24#include <linux/regulator/consumer.h>
25
Chanwoo Choidfeccb12012-05-05 06:26:47 -070026static const char * const default_event_names[] = {
27 [CM_EVENT_UNKNOWN] = "Unknown",
28 [CM_EVENT_BATT_FULL] = "Battery Full",
29 [CM_EVENT_BATT_IN] = "Battery Inserted",
30 [CM_EVENT_BATT_OUT] = "Battery Pulled Out",
31 [CM_EVENT_EXT_PWR_IN_OUT] = "External Power Attach/Detach",
32 [CM_EVENT_CHG_START_STOP] = "Charging Start/Stop",
33 [CM_EVENT_OTHERS] = "Other battery events"
34};
35
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +090036/*
37 * Regard CM_JIFFIES_SMALL jiffies is small enough to ignore for
38 * delayed works so that we can run delayed works with CM_JIFFIES_SMALL
39 * without any delays.
40 */
41#define CM_JIFFIES_SMALL (2)
42
43/* If y is valid (> 0) and smaller than x, do x = y */
44#define CM_MIN_VALID(x, y) x = (((y > 0) && ((x) > (y))) ? (y) : (x))
45
46/*
47 * Regard CM_RTC_SMALL (sec) is small enough to ignore error in invoking
48 * rtc alarm. It should be 2 or larger
49 */
50#define CM_RTC_SMALL (2)
51
52#define UEVENT_BUF_SIZE 32
53
54static LIST_HEAD(cm_list);
55static DEFINE_MUTEX(cm_list_mtx);
56
57/* About in-suspend (suspend-again) monitoring */
58static struct rtc_device *rtc_dev;
59/*
60 * Backup RTC alarm
61 * Save the wakeup alarm before entering suspend-to-RAM
62 */
63static struct rtc_wkalrm rtc_wkalarm_save;
64/* Backup RTC alarm time in terms of seconds since 01-01-1970 00:00:00 */
65static unsigned long rtc_wkalarm_save_time;
66static bool cm_suspended;
67static bool cm_rtc_set;
68static unsigned long cm_suspend_duration_ms;
69
Chanwoo Choid829dc72012-05-05 06:24:10 -070070/* About normal (not suspended) monitoring */
71static unsigned long polling_jiffy = ULONG_MAX; /* ULONG_MAX: no polling */
72static unsigned long next_polling; /* Next appointed polling time */
73static struct workqueue_struct *cm_wq; /* init at driver add */
74static struct delayed_work cm_monitor_work; /* init at driver add */
75
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +090076/* Global charger-manager description */
77static struct charger_global_desc *g_desc; /* init with setup_charger_manager */
78
79/**
80 * is_batt_present - See if the battery presents in place.
81 * @cm: the Charger Manager representing the battery.
82 */
83static bool is_batt_present(struct charger_manager *cm)
84{
85 union power_supply_propval val;
86 bool present = false;
87 int i, ret;
88
89 switch (cm->desc->battery_present) {
Chanwoo Choid829dc72012-05-05 06:24:10 -070090 case CM_BATTERY_PRESENT:
91 present = true;
92 break;
93 case CM_NO_BATTERY:
94 break;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +090095 case CM_FUEL_GAUGE:
96 ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
97 POWER_SUPPLY_PROP_PRESENT, &val);
98 if (ret == 0 && val.intval)
99 present = true;
100 break;
101 case CM_CHARGER_STAT:
102 for (i = 0; cm->charger_stat[i]; i++) {
103 ret = cm->charger_stat[i]->get_property(
104 cm->charger_stat[i],
105 POWER_SUPPLY_PROP_PRESENT, &val);
106 if (ret == 0 && val.intval) {
107 present = true;
108 break;
109 }
110 }
111 break;
112 }
113
114 return present;
115}
116
117/**
118 * is_ext_pwr_online - See if an external power source is attached to charge
119 * @cm: the Charger Manager representing the battery.
120 *
121 * Returns true if at least one of the chargers of the battery has an external
122 * power source attached to charge the battery regardless of whether it is
123 * actually charging or not.
124 */
125static bool is_ext_pwr_online(struct charger_manager *cm)
126{
127 union power_supply_propval val;
128 bool online = false;
129 int i, ret;
130
131 /* If at least one of them has one, it's yes. */
132 for (i = 0; cm->charger_stat[i]; i++) {
133 ret = cm->charger_stat[i]->get_property(
134 cm->charger_stat[i],
135 POWER_SUPPLY_PROP_ONLINE, &val);
136 if (ret == 0 && val.intval) {
137 online = true;
138 break;
139 }
140 }
141
142 return online;
143}
144
145/**
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900146 * get_batt_uV - Get the voltage level of the battery
147 * @cm: the Charger Manager representing the battery.
148 * @uV: the voltage level returned.
149 *
150 * Returns 0 if there is no error.
151 * Returns a negative value on error.
152 */
153static int get_batt_uV(struct charger_manager *cm, int *uV)
154{
155 union power_supply_propval val;
156 int ret;
157
Axel Linbb2a95c2012-01-12 12:56:35 +0800158 if (!cm->fuel_gauge)
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900159 return -ENODEV;
160
Axel Linbb2a95c2012-01-12 12:56:35 +0800161 ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
162 POWER_SUPPLY_PROP_VOLTAGE_NOW, &val);
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900163 if (ret)
164 return ret;
165
166 *uV = val.intval;
167 return 0;
168}
169
170/**
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900171 * is_charging - Returns true if the battery is being charged.
172 * @cm: the Charger Manager representing the battery.
173 */
174static bool is_charging(struct charger_manager *cm)
175{
176 int i, ret;
177 bool charging = false;
178 union power_supply_propval val;
179
180 /* If there is no battery, it cannot be charged */
181 if (!is_batt_present(cm))
182 return false;
183
184 /* If at least one of the charger is charging, return yes */
185 for (i = 0; cm->charger_stat[i]; i++) {
186 /* 1. The charger sholuld not be DISABLED */
187 if (cm->emergency_stop)
188 continue;
189 if (!cm->charger_enabled)
190 continue;
191
192 /* 2. The charger should be online (ext-power) */
193 ret = cm->charger_stat[i]->get_property(
194 cm->charger_stat[i],
195 POWER_SUPPLY_PROP_ONLINE, &val);
196 if (ret) {
197 dev_warn(cm->dev, "Cannot read ONLINE value from %s.\n",
198 cm->desc->psy_charger_stat[i]);
199 continue;
200 }
201 if (val.intval == 0)
202 continue;
203
204 /*
205 * 3. The charger should not be FULL, DISCHARGING,
206 * or NOT_CHARGING.
207 */
208 ret = cm->charger_stat[i]->get_property(
209 cm->charger_stat[i],
210 POWER_SUPPLY_PROP_STATUS, &val);
211 if (ret) {
212 dev_warn(cm->dev, "Cannot read STATUS value from %s.\n",
213 cm->desc->psy_charger_stat[i]);
214 continue;
215 }
216 if (val.intval == POWER_SUPPLY_STATUS_FULL ||
217 val.intval == POWER_SUPPLY_STATUS_DISCHARGING ||
218 val.intval == POWER_SUPPLY_STATUS_NOT_CHARGING)
219 continue;
220
221 /* Then, this is charging. */
222 charging = true;
223 break;
224 }
225
226 return charging;
227}
228
229/**
230 * is_polling_required - Return true if need to continue polling for this CM.
231 * @cm: the Charger Manager representing the battery.
232 */
233static bool is_polling_required(struct charger_manager *cm)
234{
235 switch (cm->desc->polling_mode) {
236 case CM_POLL_DISABLE:
237 return false;
238 case CM_POLL_ALWAYS:
239 return true;
240 case CM_POLL_EXTERNAL_POWER_ONLY:
241 return is_ext_pwr_online(cm);
242 case CM_POLL_CHARGING_ONLY:
243 return is_charging(cm);
244 default:
245 dev_warn(cm->dev, "Incorrect polling_mode (%d)\n",
246 cm->desc->polling_mode);
247 }
248
249 return false;
250}
251
252/**
253 * try_charger_enable - Enable/Disable chargers altogether
254 * @cm: the Charger Manager representing the battery.
255 * @enable: true: enable / false: disable
256 *
257 * Note that Charger Manager keeps the charger enabled regardless whether
258 * the charger is charging or not (because battery is full or no external
259 * power source exists) except when CM needs to disable chargers forcibly
260 * bacause of emergency causes; when the battery is overheated or too cold.
261 */
262static int try_charger_enable(struct charger_manager *cm, bool enable)
263{
264 int err = 0, i;
265 struct charger_desc *desc = cm->desc;
266
267 /* Ignore if it's redundent command */
Axel Linbb2a95c2012-01-12 12:56:35 +0800268 if (enable == cm->charger_enabled)
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900269 return 0;
270
271 if (enable) {
272 if (cm->emergency_stop)
273 return -EAGAIN;
Chanwoo Choibee737b2012-07-12 15:03:25 +0900274 for (i = 0 ; i < desc->num_charger_regulators ; i++)
275 regulator_enable(desc->charger_regulators[i].consumer);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900276 } else {
277 /*
278 * Abnormal battery state - Stop charging forcibly,
279 * even if charger was enabled at the other places
280 */
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900281 for (i = 0; i < desc->num_charger_regulators; i++) {
282 if (regulator_is_enabled(
283 desc->charger_regulators[i].consumer)) {
284 regulator_force_disable(
285 desc->charger_regulators[i].consumer);
286 dev_warn(cm->dev,
287 "Disable regulator(%s) forcibly.\n",
Chanwoo Choibee737b2012-07-12 15:03:25 +0900288 desc->charger_regulators[i].regulator_name);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900289 }
290 }
291 }
292
293 if (!err)
294 cm->charger_enabled = enable;
295
296 return err;
297}
298
299/**
Chanwoo Choid829dc72012-05-05 06:24:10 -0700300 * try_charger_restart - Restart charging.
301 * @cm: the Charger Manager representing the battery.
302 *
303 * Restart charging by turning off and on the charger.
304 */
305static int try_charger_restart(struct charger_manager *cm)
306{
307 int err;
308
309 if (cm->emergency_stop)
310 return -EAGAIN;
311
312 err = try_charger_enable(cm, false);
313 if (err)
314 return err;
315
316 return try_charger_enable(cm, true);
317}
318
319/**
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900320 * uevent_notify - Let users know something has changed.
321 * @cm: the Charger Manager representing the battery.
322 * @event: the event string.
323 *
324 * If @event is null, it implies that uevent_notify is called
325 * by resume function. When called in the resume function, cm_suspended
326 * should be already reset to false in order to let uevent_notify
327 * notify the recent event during the suspend to users. While
328 * suspended, uevent_notify does not notify users, but tracks
329 * events so that uevent_notify can notify users later after resumed.
330 */
331static void uevent_notify(struct charger_manager *cm, const char *event)
332{
333 static char env_str[UEVENT_BUF_SIZE + 1] = "";
334 static char env_str_save[UEVENT_BUF_SIZE + 1] = "";
335
336 if (cm_suspended) {
337 /* Nothing in suspended-event buffer */
338 if (env_str_save[0] == 0) {
339 if (!strncmp(env_str, event, UEVENT_BUF_SIZE))
340 return; /* status not changed */
341 strncpy(env_str_save, event, UEVENT_BUF_SIZE);
342 return;
343 }
344
345 if (!strncmp(env_str_save, event, UEVENT_BUF_SIZE))
346 return; /* Duplicated. */
Axel Linbb2a95c2012-01-12 12:56:35 +0800347 strncpy(env_str_save, event, UEVENT_BUF_SIZE);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900348 return;
349 }
350
351 if (event == NULL) {
352 /* No messages pending */
353 if (!env_str_save[0])
354 return;
355
356 strncpy(env_str, env_str_save, UEVENT_BUF_SIZE);
357 kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE);
358 env_str_save[0] = 0;
359
360 return;
361 }
362
363 /* status not changed */
364 if (!strncmp(env_str, event, UEVENT_BUF_SIZE))
365 return;
366
367 /* save the status and notify the update */
368 strncpy(env_str, event, UEVENT_BUF_SIZE);
369 kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE);
370
371 dev_info(cm->dev, event);
372}
373
374/**
Chanwoo Choid829dc72012-05-05 06:24:10 -0700375 * fullbatt_vchk - Check voltage drop some times after "FULL" event.
376 * @work: the work_struct appointing the function
377 *
378 * If a user has designated "fullbatt_vchkdrop_ms/uV" values with
379 * charger_desc, Charger Manager checks voltage drop after the battery
380 * "FULL" event. It checks whether the voltage has dropped more than
381 * fullbatt_vchkdrop_uV by calling this function after fullbatt_vchkrop_ms.
382 */
383static void fullbatt_vchk(struct work_struct *work)
384{
385 struct delayed_work *dwork = to_delayed_work(work);
386 struct charger_manager *cm = container_of(dwork,
387 struct charger_manager, fullbatt_vchk_work);
388 struct charger_desc *desc = cm->desc;
389 int batt_uV, err, diff;
390
391 /* remove the appointment for fullbatt_vchk */
392 cm->fullbatt_vchk_jiffies_at = 0;
393
394 if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms)
395 return;
396
397 err = get_batt_uV(cm, &batt_uV);
398 if (err) {
399 dev_err(cm->dev, "%s: get_batt_uV error(%d).\n", __func__, err);
400 return;
401 }
402
403 diff = cm->fullbatt_vchk_uV;
404 diff -= batt_uV;
405
406 dev_dbg(cm->dev, "VBATT dropped %duV after full-batt.\n", diff);
407
408 if (diff > desc->fullbatt_vchkdrop_uV) {
409 try_charger_restart(cm);
410 uevent_notify(cm, "Recharge");
411 }
412}
413
414/**
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900415 * _cm_monitor - Monitor the temperature and return true for exceptions.
416 * @cm: the Charger Manager representing the battery.
417 *
418 * Returns true if there is an event to notify for the battery.
419 * (True if the status of "emergency_stop" changes)
420 */
421static bool _cm_monitor(struct charger_manager *cm)
422{
423 struct charger_desc *desc = cm->desc;
424 int temp = desc->temperature_out_of_range(&cm->last_temp_mC);
425
426 dev_dbg(cm->dev, "monitoring (%2.2d.%3.3dC)\n",
427 cm->last_temp_mC / 1000, cm->last_temp_mC % 1000);
428
429 /* It has been stopped or charging already */
430 if (!!temp == !!cm->emergency_stop)
431 return false;
432
433 if (temp) {
434 cm->emergency_stop = temp;
435 if (!try_charger_enable(cm, false)) {
436 if (temp > 0)
437 uevent_notify(cm, "OVERHEAT");
438 else
439 uevent_notify(cm, "COLD");
440 }
441 } else {
442 cm->emergency_stop = 0;
443 if (!try_charger_enable(cm, true))
444 uevent_notify(cm, "CHARGING");
445 }
446
447 return true;
448}
449
450/**
451 * cm_monitor - Monitor every battery.
452 *
453 * Returns true if there is an event to notify from any of the batteries.
454 * (True if the status of "emergency_stop" changes)
455 */
456static bool cm_monitor(void)
457{
458 bool stop = false;
459 struct charger_manager *cm;
460
461 mutex_lock(&cm_list_mtx);
462
Axel Linbb2a95c2012-01-12 12:56:35 +0800463 list_for_each_entry(cm, &cm_list, entry) {
464 if (_cm_monitor(cm))
465 stop = true;
466 }
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900467
468 mutex_unlock(&cm_list_mtx);
469
470 return stop;
471}
472
Chanwoo Choid829dc72012-05-05 06:24:10 -0700473/**
474 * _setup_polling - Setup the next instance of polling.
475 * @work: work_struct of the function _setup_polling.
476 */
477static void _setup_polling(struct work_struct *work)
478{
479 unsigned long min = ULONG_MAX;
480 struct charger_manager *cm;
481 bool keep_polling = false;
482 unsigned long _next_polling;
483
484 mutex_lock(&cm_list_mtx);
485
486 list_for_each_entry(cm, &cm_list, entry) {
487 if (is_polling_required(cm) && cm->desc->polling_interval_ms) {
488 keep_polling = true;
489
490 if (min > cm->desc->polling_interval_ms)
491 min = cm->desc->polling_interval_ms;
492 }
493 }
494
495 polling_jiffy = msecs_to_jiffies(min);
496 if (polling_jiffy <= CM_JIFFIES_SMALL)
497 polling_jiffy = CM_JIFFIES_SMALL + 1;
498
499 if (!keep_polling)
500 polling_jiffy = ULONG_MAX;
501 if (polling_jiffy == ULONG_MAX)
502 goto out;
503
504 WARN(cm_wq == NULL, "charger-manager: workqueue not initialized"
505 ". try it later. %s\n", __func__);
506
507 _next_polling = jiffies + polling_jiffy;
508
509 if (!delayed_work_pending(&cm_monitor_work) ||
510 (delayed_work_pending(&cm_monitor_work) &&
511 time_after(next_polling, _next_polling))) {
512 cancel_delayed_work_sync(&cm_monitor_work);
513 next_polling = jiffies + polling_jiffy;
514 queue_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy);
515 }
516
517out:
518 mutex_unlock(&cm_list_mtx);
519}
520static DECLARE_WORK(setup_polling, _setup_polling);
521
522/**
523 * cm_monitor_poller - The Monitor / Poller.
524 * @work: work_struct of the function cm_monitor_poller
525 *
526 * During non-suspended state, cm_monitor_poller is used to poll and monitor
527 * the batteries.
528 */
529static void cm_monitor_poller(struct work_struct *work)
530{
531 cm_monitor();
532 schedule_work(&setup_polling);
533}
534
Chanwoo Choidfeccb12012-05-05 06:26:47 -0700535/**
536 * fullbatt_handler - Event handler for CM_EVENT_BATT_FULL
537 * @cm: the Charger Manager representing the battery.
538 */
539static void fullbatt_handler(struct charger_manager *cm)
540{
541 struct charger_desc *desc = cm->desc;
542
543 if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms)
544 goto out;
545
546 if (cm_suspended)
547 device_set_wakeup_capable(cm->dev, true);
548
549 if (delayed_work_pending(&cm->fullbatt_vchk_work))
550 cancel_delayed_work(&cm->fullbatt_vchk_work);
551 queue_delayed_work(cm_wq, &cm->fullbatt_vchk_work,
552 msecs_to_jiffies(desc->fullbatt_vchkdrop_ms));
553 cm->fullbatt_vchk_jiffies_at = jiffies + msecs_to_jiffies(
554 desc->fullbatt_vchkdrop_ms);
555
556 if (cm->fullbatt_vchk_jiffies_at == 0)
557 cm->fullbatt_vchk_jiffies_at = 1;
558
559out:
560 dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged.\n");
561 uevent_notify(cm, default_event_names[CM_EVENT_BATT_FULL]);
562}
563
564/**
565 * battout_handler - Event handler for CM_EVENT_BATT_OUT
566 * @cm: the Charger Manager representing the battery.
567 */
568static void battout_handler(struct charger_manager *cm)
569{
570 if (cm_suspended)
571 device_set_wakeup_capable(cm->dev, true);
572
573 if (!is_batt_present(cm)) {
574 dev_emerg(cm->dev, "Battery Pulled Out!\n");
575 uevent_notify(cm, default_event_names[CM_EVENT_BATT_OUT]);
576 } else {
577 uevent_notify(cm, "Battery Reinserted?");
578 }
579}
580
581/**
582 * misc_event_handler - Handler for other evnets
583 * @cm: the Charger Manager representing the battery.
584 * @type: the Charger Manager representing the battery.
585 */
586static void misc_event_handler(struct charger_manager *cm,
587 enum cm_event_types type)
588{
589 if (cm_suspended)
590 device_set_wakeup_capable(cm->dev, true);
591
592 if (!delayed_work_pending(&cm_monitor_work) &&
593 is_polling_required(cm) && cm->desc->polling_interval_ms)
594 schedule_work(&setup_polling);
595 uevent_notify(cm, default_event_names[type]);
596}
597
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900598static int charger_get_property(struct power_supply *psy,
599 enum power_supply_property psp,
600 union power_supply_propval *val)
601{
602 struct charger_manager *cm = container_of(psy,
603 struct charger_manager, charger_psy);
604 struct charger_desc *desc = cm->desc;
Anton Vorontsovdf58c042012-03-15 21:01:28 +0400605 int ret = 0;
606 int uV;
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900607
608 switch (psp) {
609 case POWER_SUPPLY_PROP_STATUS:
610 if (is_charging(cm))
611 val->intval = POWER_SUPPLY_STATUS_CHARGING;
612 else if (is_ext_pwr_online(cm))
613 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
614 else
615 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
616 break;
617 case POWER_SUPPLY_PROP_HEALTH:
618 if (cm->emergency_stop > 0)
619 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
620 else if (cm->emergency_stop < 0)
621 val->intval = POWER_SUPPLY_HEALTH_COLD;
622 else
623 val->intval = POWER_SUPPLY_HEALTH_GOOD;
624 break;
625 case POWER_SUPPLY_PROP_PRESENT:
626 if (is_batt_present(cm))
627 val->intval = 1;
628 else
629 val->intval = 0;
630 break;
631 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
Anton Vorontsovdf58c042012-03-15 21:01:28 +0400632 ret = get_batt_uV(cm, &val->intval);
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900633 break;
634 case POWER_SUPPLY_PROP_CURRENT_NOW:
635 ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
636 POWER_SUPPLY_PROP_CURRENT_NOW, val);
637 break;
638 case POWER_SUPPLY_PROP_TEMP:
639 /* in thenth of centigrade */
640 if (cm->last_temp_mC == INT_MIN)
641 desc->temperature_out_of_range(&cm->last_temp_mC);
642 val->intval = cm->last_temp_mC / 100;
643 if (!desc->measure_battery_temp)
644 ret = -ENODEV;
645 break;
646 case POWER_SUPPLY_PROP_TEMP_AMBIENT:
647 /* in thenth of centigrade */
648 if (cm->last_temp_mC == INT_MIN)
649 desc->temperature_out_of_range(&cm->last_temp_mC);
650 val->intval = cm->last_temp_mC / 100;
651 if (desc->measure_battery_temp)
652 ret = -ENODEV;
653 break;
654 case POWER_SUPPLY_PROP_CAPACITY:
655 if (!cm->fuel_gauge) {
656 ret = -ENODEV;
657 break;
658 }
659
660 if (!is_batt_present(cm)) {
661 /* There is no battery. Assume 100% */
662 val->intval = 100;
663 break;
664 }
665
666 ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
667 POWER_SUPPLY_PROP_CAPACITY, val);
668 if (ret)
669 break;
670
671 if (val->intval > 100) {
672 val->intval = 100;
673 break;
674 }
675 if (val->intval < 0)
676 val->intval = 0;
677
678 /* Do not adjust SOC when charging: voltage is overrated */
679 if (is_charging(cm))
680 break;
681
682 /*
683 * If the capacity value is inconsistent, calibrate it base on
684 * the battery voltage values and the thresholds given as desc
685 */
686 ret = get_batt_uV(cm, &uV);
687 if (ret) {
688 /* Voltage information not available. No calibration */
689 ret = 0;
690 break;
691 }
692
693 if (desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV &&
694 !is_charging(cm)) {
695 val->intval = 100;
696 break;
697 }
698
699 break;
700 case POWER_SUPPLY_PROP_ONLINE:
701 if (is_ext_pwr_online(cm))
702 val->intval = 1;
703 else
704 val->intval = 0;
705 break;
706 case POWER_SUPPLY_PROP_CHARGE_FULL:
707 if (cm->fuel_gauge) {
708 if (cm->fuel_gauge->get_property(cm->fuel_gauge,
709 POWER_SUPPLY_PROP_CHARGE_FULL, val) == 0)
710 break;
711 }
712
713 if (is_ext_pwr_online(cm)) {
714 /* Not full if it's charging. */
715 if (is_charging(cm)) {
716 val->intval = 0;
717 break;
718 }
719 /*
720 * Full if it's powered but not charging andi
721 * not forced stop by emergency
722 */
723 if (!cm->emergency_stop) {
724 val->intval = 1;
725 break;
726 }
727 }
728
729 /* Full if it's over the fullbatt voltage */
730 ret = get_batt_uV(cm, &uV);
731 if (!ret && desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV &&
732 !is_charging(cm)) {
733 val->intval = 1;
734 break;
735 }
736
737 /* Full if the cap is 100 */
738 if (cm->fuel_gauge) {
739 ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
740 POWER_SUPPLY_PROP_CAPACITY, val);
741 if (!ret && val->intval >= 100 && !is_charging(cm)) {
742 val->intval = 1;
743 break;
744 }
745 }
746
747 val->intval = 0;
748 ret = 0;
749 break;
750 case POWER_SUPPLY_PROP_CHARGE_NOW:
751 if (is_charging(cm)) {
752 ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
753 POWER_SUPPLY_PROP_CHARGE_NOW,
754 val);
755 if (ret) {
756 val->intval = 1;
757 ret = 0;
758 } else {
759 /* If CHARGE_NOW is supplied, use it */
760 val->intval = (val->intval > 0) ?
761 val->intval : 1;
762 }
763 } else {
764 val->intval = 0;
765 }
766 break;
767 default:
768 return -EINVAL;
769 }
770 return ret;
771}
772
773#define NUM_CHARGER_PSY_OPTIONAL (4)
774static enum power_supply_property default_charger_props[] = {
775 /* Guaranteed to provide */
776 POWER_SUPPLY_PROP_STATUS,
777 POWER_SUPPLY_PROP_HEALTH,
778 POWER_SUPPLY_PROP_PRESENT,
779 POWER_SUPPLY_PROP_VOLTAGE_NOW,
780 POWER_SUPPLY_PROP_CAPACITY,
781 POWER_SUPPLY_PROP_ONLINE,
782 POWER_SUPPLY_PROP_CHARGE_FULL,
783 /*
784 * Optional properties are:
785 * POWER_SUPPLY_PROP_CHARGE_NOW,
786 * POWER_SUPPLY_PROP_CURRENT_NOW,
787 * POWER_SUPPLY_PROP_TEMP, and
788 * POWER_SUPPLY_PROP_TEMP_AMBIENT,
789 */
790};
791
792static struct power_supply psy_default = {
793 .name = "battery",
794 .type = POWER_SUPPLY_TYPE_BATTERY,
795 .properties = default_charger_props,
796 .num_properties = ARRAY_SIZE(default_charger_props),
797 .get_property = charger_get_property,
798};
799
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900800/**
801 * cm_setup_timer - For in-suspend monitoring setup wakeup alarm
802 * for suspend_again.
803 *
804 * Returns true if the alarm is set for Charger Manager to use.
805 * Returns false if
806 * cm_setup_timer fails to set an alarm,
807 * cm_setup_timer does not need to set an alarm for Charger Manager,
808 * or an alarm previously configured is to be used.
809 */
810static bool cm_setup_timer(void)
811{
812 struct charger_manager *cm;
813 unsigned int wakeup_ms = UINT_MAX;
814 bool ret = false;
815
816 mutex_lock(&cm_list_mtx);
817
818 list_for_each_entry(cm, &cm_list, entry) {
Chanwoo Choid829dc72012-05-05 06:24:10 -0700819 unsigned int fbchk_ms = 0;
820
821 /* fullbatt_vchk is required. setup timer for that */
822 if (cm->fullbatt_vchk_jiffies_at) {
823 fbchk_ms = jiffies_to_msecs(cm->fullbatt_vchk_jiffies_at
824 - jiffies);
825 if (time_is_before_eq_jiffies(
826 cm->fullbatt_vchk_jiffies_at) ||
827 msecs_to_jiffies(fbchk_ms) < CM_JIFFIES_SMALL) {
828 fullbatt_vchk(&cm->fullbatt_vchk_work.work);
829 fbchk_ms = 0;
830 }
831 }
832 CM_MIN_VALID(wakeup_ms, fbchk_ms);
833
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900834 /* Skip if polling is not required for this CM */
835 if (!is_polling_required(cm) && !cm->emergency_stop)
836 continue;
837 if (cm->desc->polling_interval_ms == 0)
838 continue;
839 CM_MIN_VALID(wakeup_ms, cm->desc->polling_interval_ms);
840 }
841
842 mutex_unlock(&cm_list_mtx);
843
844 if (wakeup_ms < UINT_MAX && wakeup_ms > 0) {
845 pr_info("Charger Manager wakeup timer: %u ms.\n", wakeup_ms);
846 if (rtc_dev) {
847 struct rtc_wkalrm tmp;
848 unsigned long time, now;
849 unsigned long add = DIV_ROUND_UP(wakeup_ms, 1000);
850
851 /*
852 * Set alarm with the polling interval (wakeup_ms)
853 * except when rtc_wkalarm_save comes first.
854 * However, the alarm time should be NOW +
855 * CM_RTC_SMALL or later.
856 */
857 tmp.enabled = 1;
858 rtc_read_time(rtc_dev, &tmp.time);
859 rtc_tm_to_time(&tmp.time, &now);
860 if (add < CM_RTC_SMALL)
861 add = CM_RTC_SMALL;
862 time = now + add;
863
864 ret = true;
865
866 if (rtc_wkalarm_save.enabled &&
867 rtc_wkalarm_save_time &&
868 rtc_wkalarm_save_time < time) {
869 if (rtc_wkalarm_save_time < now + CM_RTC_SMALL)
870 time = now + CM_RTC_SMALL;
871 else
872 time = rtc_wkalarm_save_time;
873
874 /* The timer is not appointed by CM */
875 ret = false;
876 }
877
878 pr_info("Waking up after %lu secs.\n",
879 time - now);
880
881 rtc_time_to_tm(time, &tmp.time);
882 rtc_set_alarm(rtc_dev, &tmp);
883 cm_suspend_duration_ms += wakeup_ms;
884 return ret;
885 }
886 }
887
888 if (rtc_dev)
889 rtc_set_alarm(rtc_dev, &rtc_wkalarm_save);
890 return false;
891}
892
Chanwoo Choid829dc72012-05-05 06:24:10 -0700893static void _cm_fbchk_in_suspend(struct charger_manager *cm)
894{
895 unsigned long jiffy_now = jiffies;
896
897 if (!cm->fullbatt_vchk_jiffies_at)
898 return;
899
900 if (g_desc && g_desc->assume_timer_stops_in_suspend)
901 jiffy_now += msecs_to_jiffies(cm_suspend_duration_ms);
902
903 /* Execute now if it's going to be executed not too long after */
904 jiffy_now += CM_JIFFIES_SMALL;
905
906 if (time_after_eq(jiffy_now, cm->fullbatt_vchk_jiffies_at))
907 fullbatt_vchk(&cm->fullbatt_vchk_work.work);
908}
909
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900910/**
911 * cm_suspend_again - Determine whether suspend again or not
912 *
913 * Returns true if the system should be suspended again
914 * Returns false if the system should be woken up
915 */
916bool cm_suspend_again(void)
917{
918 struct charger_manager *cm;
919 bool ret = false;
920
921 if (!g_desc || !g_desc->rtc_only_wakeup || !g_desc->rtc_only_wakeup() ||
922 !cm_rtc_set)
923 return false;
924
925 if (cm_monitor())
926 goto out;
927
928 ret = true;
929 mutex_lock(&cm_list_mtx);
930 list_for_each_entry(cm, &cm_list, entry) {
Chanwoo Choid829dc72012-05-05 06:24:10 -0700931 _cm_fbchk_in_suspend(cm);
932
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900933 if (cm->status_save_ext_pwr_inserted != is_ext_pwr_online(cm) ||
Axel Linbb2a95c2012-01-12 12:56:35 +0800934 cm->status_save_batt != is_batt_present(cm)) {
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900935 ret = false;
Axel Linbb2a95c2012-01-12 12:56:35 +0800936 break;
937 }
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900938 }
939 mutex_unlock(&cm_list_mtx);
940
941 cm_rtc_set = cm_setup_timer();
942out:
943 /* It's about the time when the non-CM appointed timer goes off */
944 if (rtc_wkalarm_save.enabled) {
945 unsigned long now;
946 struct rtc_time tmp;
947
948 rtc_read_time(rtc_dev, &tmp);
949 rtc_tm_to_time(&tmp, &now);
950
951 if (rtc_wkalarm_save_time &&
952 now + CM_RTC_SMALL >= rtc_wkalarm_save_time)
953 return false;
954 }
955 return ret;
956}
957EXPORT_SYMBOL_GPL(cm_suspend_again);
958
959/**
960 * setup_charger_manager - initialize charger_global_desc data
961 * @gd: pointer to instance of charger_global_desc
962 */
963int setup_charger_manager(struct charger_global_desc *gd)
964{
965 if (!gd)
966 return -EINVAL;
967
968 if (rtc_dev)
969 rtc_class_close(rtc_dev);
970 rtc_dev = NULL;
971 g_desc = NULL;
972
973 if (!gd->rtc_only_wakeup) {
974 pr_err("The callback rtc_only_wakeup is not given.\n");
975 return -EINVAL;
976 }
977
978 if (gd->rtc_name) {
979 rtc_dev = rtc_class_open(gd->rtc_name);
980 if (IS_ERR_OR_NULL(rtc_dev)) {
981 rtc_dev = NULL;
982 /* Retry at probe. RTC may be not registered yet */
983 }
984 } else {
985 pr_warn("No wakeup timer is given for charger manager."
986 "In-suspend monitoring won't work.\n");
987 }
988
989 g_desc = gd;
990 return 0;
991}
992EXPORT_SYMBOL_GPL(setup_charger_manager);
993
Chanwoo Choibee737b2012-07-12 15:03:25 +0900994/**
995 * charger_extcon_work - enable/diable charger according to the state
996 * of charger cable
997 *
998 * @work: work_struct of the function charger_extcon_work.
999 */
1000static void charger_extcon_work(struct work_struct *work)
1001{
1002 struct charger_cable *cable =
1003 container_of(work, struct charger_cable, wq);
Chanwoo Choi45cd4fb2012-07-12 15:03:29 +09001004 int ret;
1005
1006 if (cable->attached && cable->min_uA != 0 && cable->max_uA != 0) {
1007 ret = regulator_set_current_limit(cable->charger->consumer,
1008 cable->min_uA, cable->max_uA);
1009 if (ret < 0) {
1010 pr_err("Cannot set current limit of %s (%s)\n",
1011 cable->charger->regulator_name, cable->name);
1012 return;
1013 }
1014
1015 pr_info("Set current limit of %s : %duA ~ %duA\n",
1016 cable->charger->regulator_name,
1017 cable->min_uA, cable->max_uA);
1018 }
Chanwoo Choibee737b2012-07-12 15:03:25 +09001019
1020 try_charger_enable(cable->cm, cable->attached);
1021}
1022
1023/**
1024 * charger_extcon_notifier - receive the state of charger cable
1025 * when registered cable is attached or detached.
1026 *
1027 * @self: the notifier block of the charger_extcon_notifier.
1028 * @event: the cable state.
1029 * @ptr: the data pointer of notifier block.
1030 */
1031static int charger_extcon_notifier(struct notifier_block *self,
1032 unsigned long event, void *ptr)
1033{
1034 struct charger_cable *cable =
1035 container_of(self, struct charger_cable, nb);
1036
1037 cable->attached = event;
1038 schedule_work(&cable->wq);
1039
1040 return NOTIFY_DONE;
1041}
1042
1043/**
1044 * charger_extcon_init - register external connector to use it
1045 * as the charger cable
1046 *
1047 * @cm: the Charger Manager representing the battery.
1048 * @cable: the Charger cable representing the external connector.
1049 */
1050static int charger_extcon_init(struct charger_manager *cm,
1051 struct charger_cable *cable)
1052{
1053 int ret = 0;
1054
1055 /*
1056 * Charger manager use Extcon framework to identify
1057 * the charger cable among various external connector
1058 * cable (e.g., TA, USB, MHL, Dock).
1059 */
1060 INIT_WORK(&cable->wq, charger_extcon_work);
1061 cable->nb.notifier_call = charger_extcon_notifier;
1062 ret = extcon_register_interest(&cable->extcon_dev,
1063 cable->extcon_name, cable->name, &cable->nb);
1064 if (ret < 0) {
1065 pr_info("Cannot register extcon_dev for %s(cable: %s).\n",
1066 cable->extcon_name,
1067 cable->name);
1068 ret = -EINVAL;
1069 }
1070
1071 return ret;
1072}
1073
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001074static int charger_manager_probe(struct platform_device *pdev)
1075{
1076 struct charger_desc *desc = dev_get_platdata(&pdev->dev);
1077 struct charger_manager *cm;
1078 int ret = 0, i = 0;
Chanwoo Choibee737b2012-07-12 15:03:25 +09001079 int j = 0;
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001080 union power_supply_propval val;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001081
1082 if (g_desc && !rtc_dev && g_desc->rtc_name) {
1083 rtc_dev = rtc_class_open(g_desc->rtc_name);
1084 if (IS_ERR_OR_NULL(rtc_dev)) {
1085 rtc_dev = NULL;
1086 dev_err(&pdev->dev, "Cannot get RTC %s.\n",
1087 g_desc->rtc_name);
1088 ret = -ENODEV;
1089 goto err_alloc;
1090 }
1091 }
1092
1093 if (!desc) {
1094 dev_err(&pdev->dev, "No platform data (desc) found.\n");
1095 ret = -ENODEV;
1096 goto err_alloc;
1097 }
1098
1099 cm = kzalloc(sizeof(struct charger_manager), GFP_KERNEL);
1100 if (!cm) {
1101 dev_err(&pdev->dev, "Cannot allocate memory.\n");
1102 ret = -ENOMEM;
1103 goto err_alloc;
1104 }
1105
1106 /* Basic Values. Unspecified are Null or 0 */
1107 cm->dev = &pdev->dev;
1108 cm->desc = kzalloc(sizeof(struct charger_desc), GFP_KERNEL);
1109 if (!cm->desc) {
1110 dev_err(&pdev->dev, "Cannot allocate memory.\n");
1111 ret = -ENOMEM;
1112 goto err_alloc_desc;
1113 }
1114 memcpy(cm->desc, desc, sizeof(struct charger_desc));
1115 cm->last_temp_mC = INT_MIN; /* denotes "unmeasured, yet" */
1116
Chanwoo Choid829dc72012-05-05 06:24:10 -07001117 /*
1118 * The following two do not need to be errors.
1119 * Users may intentionally ignore those two features.
1120 */
1121 if (desc->fullbatt_uV == 0) {
1122 dev_info(&pdev->dev, "Ignoring full-battery voltage threshold"
1123 " as it is not supplied.");
1124 }
1125 if (!desc->fullbatt_vchkdrop_ms || !desc->fullbatt_vchkdrop_uV) {
1126 dev_info(&pdev->dev, "Disabling full-battery voltage drop "
1127 "checking mechanism as it is not supplied.");
1128 desc->fullbatt_vchkdrop_ms = 0;
1129 desc->fullbatt_vchkdrop_uV = 0;
1130 }
1131
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001132 if (!desc->charger_regulators || desc->num_charger_regulators < 1) {
1133 ret = -EINVAL;
1134 dev_err(&pdev->dev, "charger_regulators undefined.\n");
1135 goto err_no_charger;
1136 }
1137
1138 if (!desc->psy_charger_stat || !desc->psy_charger_stat[0]) {
1139 dev_err(&pdev->dev, "No power supply defined.\n");
1140 ret = -EINVAL;
1141 goto err_no_charger_stat;
1142 }
1143
1144 /* Counting index only */
1145 while (desc->psy_charger_stat[i])
1146 i++;
1147
1148 cm->charger_stat = kzalloc(sizeof(struct power_supply *) * (i + 1),
1149 GFP_KERNEL);
1150 if (!cm->charger_stat) {
1151 ret = -ENOMEM;
1152 goto err_no_charger_stat;
1153 }
1154
1155 for (i = 0; desc->psy_charger_stat[i]; i++) {
1156 cm->charger_stat[i] = power_supply_get_by_name(
1157 desc->psy_charger_stat[i]);
1158 if (!cm->charger_stat[i]) {
1159 dev_err(&pdev->dev, "Cannot find power supply "
1160 "\"%s\"\n",
1161 desc->psy_charger_stat[i]);
1162 ret = -ENODEV;
1163 goto err_chg_stat;
1164 }
1165 }
1166
1167 cm->fuel_gauge = power_supply_get_by_name(desc->psy_fuel_gauge);
1168 if (!cm->fuel_gauge) {
1169 dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n",
1170 desc->psy_fuel_gauge);
1171 ret = -ENODEV;
1172 goto err_chg_stat;
1173 }
1174
1175 if (desc->polling_interval_ms == 0 ||
1176 msecs_to_jiffies(desc->polling_interval_ms) <= CM_JIFFIES_SMALL) {
1177 dev_err(&pdev->dev, "polling_interval_ms is too small\n");
1178 ret = -EINVAL;
1179 goto err_chg_stat;
1180 }
1181
1182 if (!desc->temperature_out_of_range) {
1183 dev_err(&pdev->dev, "there is no temperature_out_of_range\n");
1184 ret = -EINVAL;
1185 goto err_chg_stat;
1186 }
1187
1188 platform_set_drvdata(pdev, cm);
1189
Axel Linbb2a95c2012-01-12 12:56:35 +08001190 memcpy(&cm->charger_psy, &psy_default, sizeof(psy_default));
1191
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001192 if (!desc->psy_name) {
Axel Linbb2a95c2012-01-12 12:56:35 +08001193 strncpy(cm->psy_name_buf, psy_default.name, PSY_NAME_MAX);
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001194 } else {
1195 strncpy(cm->psy_name_buf, desc->psy_name, PSY_NAME_MAX);
1196 }
1197 cm->charger_psy.name = cm->psy_name_buf;
1198
1199 /* Allocate for psy properties because they may vary */
1200 cm->charger_psy.properties = kzalloc(sizeof(enum power_supply_property)
1201 * (ARRAY_SIZE(default_charger_props) +
1202 NUM_CHARGER_PSY_OPTIONAL),
1203 GFP_KERNEL);
1204 if (!cm->charger_psy.properties) {
1205 dev_err(&pdev->dev, "Cannot allocate for psy properties.\n");
1206 ret = -ENOMEM;
1207 goto err_chg_stat;
1208 }
1209 memcpy(cm->charger_psy.properties, default_charger_props,
1210 sizeof(enum power_supply_property) *
1211 ARRAY_SIZE(default_charger_props));
1212 cm->charger_psy.num_properties = psy_default.num_properties;
1213
1214 /* Find which optional psy-properties are available */
1215 if (!cm->fuel_gauge->get_property(cm->fuel_gauge,
1216 POWER_SUPPLY_PROP_CHARGE_NOW, &val)) {
1217 cm->charger_psy.properties[cm->charger_psy.num_properties] =
1218 POWER_SUPPLY_PROP_CHARGE_NOW;
1219 cm->charger_psy.num_properties++;
1220 }
1221 if (!cm->fuel_gauge->get_property(cm->fuel_gauge,
1222 POWER_SUPPLY_PROP_CURRENT_NOW,
1223 &val)) {
1224 cm->charger_psy.properties[cm->charger_psy.num_properties] =
1225 POWER_SUPPLY_PROP_CURRENT_NOW;
1226 cm->charger_psy.num_properties++;
1227 }
Axel Linbb2a95c2012-01-12 12:56:35 +08001228
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001229 if (desc->measure_battery_temp) {
1230 cm->charger_psy.properties[cm->charger_psy.num_properties] =
1231 POWER_SUPPLY_PROP_TEMP;
1232 cm->charger_psy.num_properties++;
Axel Linbb2a95c2012-01-12 12:56:35 +08001233 } else {
1234 cm->charger_psy.properties[cm->charger_psy.num_properties] =
1235 POWER_SUPPLY_PROP_TEMP_AMBIENT;
1236 cm->charger_psy.num_properties++;
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001237 }
1238
Chanwoo Choid829dc72012-05-05 06:24:10 -07001239 INIT_DELAYED_WORK(&cm->fullbatt_vchk_work, fullbatt_vchk);
1240
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001241 ret = power_supply_register(NULL, &cm->charger_psy);
1242 if (ret) {
1243 dev_err(&pdev->dev, "Cannot register charger-manager with"
1244 " name \"%s\".\n", cm->charger_psy.name);
1245 goto err_register;
1246 }
1247
Chanwoo Choibee737b2012-07-12 15:03:25 +09001248 for (i = 0 ; i < desc->num_charger_regulators ; i++) {
1249 struct charger_regulator *charger
1250 = &desc->charger_regulators[i];
1251
1252 charger->consumer = regulator_get(&pdev->dev,
1253 charger->regulator_name);
1254 if (charger->consumer == NULL) {
1255 dev_err(&pdev->dev, "Cannot find charger(%s)n",
1256 charger->regulator_name);
1257 ret = -EINVAL;
1258 goto err_chg_get;
1259 }
1260
1261 for (j = 0 ; j < charger->num_cables ; j++) {
1262 struct charger_cable *cable = &charger->cables[j];
1263
1264 ret = charger_extcon_init(cm, cable);
1265 if (ret < 0) {
1266 dev_err(&pdev->dev, "Cannot find charger(%s)n",
1267 charger->regulator_name);
1268 goto err_extcon;
1269 }
1270 cable->charger = charger;
1271 cable->cm = cm;
1272 }
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001273 }
1274
1275 ret = try_charger_enable(cm, true);
1276 if (ret) {
1277 dev_err(&pdev->dev, "Cannot enable charger regulators\n");
1278 goto err_chg_enable;
1279 }
1280
1281 /* Add to the list */
1282 mutex_lock(&cm_list_mtx);
1283 list_add(&cm->entry, &cm_list);
1284 mutex_unlock(&cm_list_mtx);
1285
Chanwoo Choidfeccb12012-05-05 06:26:47 -07001286 /*
1287 * Charger-manager is capable of waking up the systme from sleep
1288 * when event is happend through cm_notify_event()
1289 */
1290 device_init_wakeup(&pdev->dev, true);
1291 device_set_wakeup_capable(&pdev->dev, false);
1292
Chanwoo Choid829dc72012-05-05 06:24:10 -07001293 schedule_work(&setup_polling);
1294
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001295 return 0;
1296
1297err_chg_enable:
Chanwoo Choibee737b2012-07-12 15:03:25 +09001298err_extcon:
1299 for (i = 0 ; i < desc->num_charger_regulators ; i++) {
1300 struct charger_regulator *charger
1301 = &desc->charger_regulators[i];
1302 for (j = 0 ; j < charger->num_cables ; j++) {
1303 struct charger_cable *cable = &charger->cables[j];
1304 extcon_unregister_interest(&cable->extcon_dev);
1305 }
1306 }
1307err_chg_get:
1308 for (i = 0 ; i < desc->num_charger_regulators ; i++)
1309 regulator_put(desc->charger_regulators[i].consumer);
1310
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001311 power_supply_unregister(&cm->charger_psy);
1312err_register:
1313 kfree(cm->charger_psy.properties);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001314err_chg_stat:
1315 kfree(cm->charger_stat);
1316err_no_charger_stat:
1317err_no_charger:
1318 kfree(cm->desc);
1319err_alloc_desc:
1320 kfree(cm);
1321err_alloc:
1322 return ret;
1323}
1324
1325static int __devexit charger_manager_remove(struct platform_device *pdev)
1326{
1327 struct charger_manager *cm = platform_get_drvdata(pdev);
1328 struct charger_desc *desc = cm->desc;
Chanwoo Choibee737b2012-07-12 15:03:25 +09001329 int i = 0;
1330 int j = 0;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001331
1332 /* Remove from the list */
1333 mutex_lock(&cm_list_mtx);
1334 list_del(&cm->entry);
1335 mutex_unlock(&cm_list_mtx);
1336
Chanwoo Choid829dc72012-05-05 06:24:10 -07001337 if (work_pending(&setup_polling))
1338 cancel_work_sync(&setup_polling);
1339 if (delayed_work_pending(&cm_monitor_work))
1340 cancel_delayed_work_sync(&cm_monitor_work);
1341
Chanwoo Choibee737b2012-07-12 15:03:25 +09001342 for (i = 0 ; i < desc->num_charger_regulators ; i++) {
1343 struct charger_regulator *charger
1344 = &desc->charger_regulators[i];
1345 for (j = 0 ; j < charger->num_cables ; j++) {
1346 struct charger_cable *cable = &charger->cables[j];
1347 extcon_unregister_interest(&cable->extcon_dev);
1348 }
1349 }
1350
1351 for (i = 0 ; i < desc->num_charger_regulators ; i++)
1352 regulator_put(desc->charger_regulators[i].consumer);
1353
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001354 power_supply_unregister(&cm->charger_psy);
Chanwoo Choid829dc72012-05-05 06:24:10 -07001355
1356 try_charger_enable(cm, false);
1357
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001358 kfree(cm->charger_psy.properties);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001359 kfree(cm->charger_stat);
1360 kfree(cm->desc);
1361 kfree(cm);
1362
1363 return 0;
1364}
1365
Axel Lin1bbe24d2012-01-11 17:19:45 +08001366static const struct platform_device_id charger_manager_id[] = {
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001367 { "charger-manager", 0 },
1368 { },
1369};
Axel Lin1bbe24d2012-01-11 17:19:45 +08001370MODULE_DEVICE_TABLE(platform, charger_manager_id);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001371
Chanwoo Choidfeccb12012-05-05 06:26:47 -07001372static int cm_suspend_noirq(struct device *dev)
1373{
1374 int ret = 0;
1375
1376 if (device_may_wakeup(dev)) {
1377 device_set_wakeup_capable(dev, false);
1378 ret = -EAGAIN;
1379 }
1380
1381 return ret;
1382}
1383
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001384static int cm_suspend_prepare(struct device *dev)
1385{
Axel Linbb2a95c2012-01-12 12:56:35 +08001386 struct charger_manager *cm = dev_get_drvdata(dev);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001387
1388 if (!cm_suspended) {
1389 if (rtc_dev) {
1390 struct rtc_time tmp;
1391 unsigned long now;
1392
1393 rtc_read_alarm(rtc_dev, &rtc_wkalarm_save);
1394 rtc_read_time(rtc_dev, &tmp);
1395
1396 if (rtc_wkalarm_save.enabled) {
1397 rtc_tm_to_time(&rtc_wkalarm_save.time,
1398 &rtc_wkalarm_save_time);
1399 rtc_tm_to_time(&tmp, &now);
1400 if (now > rtc_wkalarm_save_time)
1401 rtc_wkalarm_save_time = 0;
1402 } else {
1403 rtc_wkalarm_save_time = 0;
1404 }
1405 }
1406 cm_suspended = true;
1407 }
1408
Chanwoo Choid829dc72012-05-05 06:24:10 -07001409 if (delayed_work_pending(&cm->fullbatt_vchk_work))
1410 cancel_delayed_work(&cm->fullbatt_vchk_work);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001411 cm->status_save_ext_pwr_inserted = is_ext_pwr_online(cm);
1412 cm->status_save_batt = is_batt_present(cm);
1413
1414 if (!cm_rtc_set) {
1415 cm_suspend_duration_ms = 0;
1416 cm_rtc_set = cm_setup_timer();
1417 }
1418
1419 return 0;
1420}
1421
1422static void cm_suspend_complete(struct device *dev)
1423{
Axel Linbb2a95c2012-01-12 12:56:35 +08001424 struct charger_manager *cm = dev_get_drvdata(dev);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001425
1426 if (cm_suspended) {
1427 if (rtc_dev) {
1428 struct rtc_wkalrm tmp;
1429
1430 rtc_read_alarm(rtc_dev, &tmp);
1431 rtc_wkalarm_save.pending = tmp.pending;
1432 rtc_set_alarm(rtc_dev, &rtc_wkalarm_save);
1433 }
1434 cm_suspended = false;
1435 cm_rtc_set = false;
1436 }
1437
Chanwoo Choid829dc72012-05-05 06:24:10 -07001438 /* Re-enqueue delayed work (fullbatt_vchk_work) */
1439 if (cm->fullbatt_vchk_jiffies_at) {
1440 unsigned long delay = 0;
1441 unsigned long now = jiffies + CM_JIFFIES_SMALL;
1442
1443 if (time_after_eq(now, cm->fullbatt_vchk_jiffies_at)) {
1444 delay = (unsigned long)((long)now
1445 - (long)(cm->fullbatt_vchk_jiffies_at));
1446 delay = jiffies_to_msecs(delay);
1447 } else {
1448 delay = 0;
1449 }
1450
1451 /*
1452 * Account for cm_suspend_duration_ms if
1453 * assume_timer_stops_in_suspend is active
1454 */
1455 if (g_desc && g_desc->assume_timer_stops_in_suspend) {
1456 if (delay > cm_suspend_duration_ms)
1457 delay -= cm_suspend_duration_ms;
1458 else
1459 delay = 0;
1460 }
1461
1462 queue_delayed_work(cm_wq, &cm->fullbatt_vchk_work,
1463 msecs_to_jiffies(delay));
1464 }
Chanwoo Choidfeccb12012-05-05 06:26:47 -07001465 device_set_wakeup_capable(cm->dev, false);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001466 uevent_notify(cm, NULL);
1467}
1468
1469static const struct dev_pm_ops charger_manager_pm = {
1470 .prepare = cm_suspend_prepare,
Chanwoo Choidfeccb12012-05-05 06:26:47 -07001471 .suspend_noirq = cm_suspend_noirq,
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001472 .complete = cm_suspend_complete,
1473};
1474
1475static struct platform_driver charger_manager_driver = {
1476 .driver = {
1477 .name = "charger-manager",
1478 .owner = THIS_MODULE,
1479 .pm = &charger_manager_pm,
1480 },
1481 .probe = charger_manager_probe,
1482 .remove = __devexit_p(charger_manager_remove),
1483 .id_table = charger_manager_id,
1484};
1485
1486static int __init charger_manager_init(void)
1487{
Chanwoo Choid829dc72012-05-05 06:24:10 -07001488 cm_wq = create_freezable_workqueue("charger_manager");
1489 INIT_DELAYED_WORK(&cm_monitor_work, cm_monitor_poller);
1490
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001491 return platform_driver_register(&charger_manager_driver);
1492}
1493late_initcall(charger_manager_init);
1494
1495static void __exit charger_manager_cleanup(void)
1496{
Chanwoo Choid829dc72012-05-05 06:24:10 -07001497 destroy_workqueue(cm_wq);
1498 cm_wq = NULL;
1499
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001500 platform_driver_unregister(&charger_manager_driver);
1501}
1502module_exit(charger_manager_cleanup);
1503
Chanwoo Choidfeccb12012-05-05 06:26:47 -07001504/**
1505 * find_power_supply - find the associated power_supply of charger
1506 * @cm: the Charger Manager representing the battery
1507 * @psy: pointer to instance of charger's power_supply
1508 */
1509static bool find_power_supply(struct charger_manager *cm,
1510 struct power_supply *psy)
1511{
1512 int i;
1513 bool found = false;
1514
1515 for (i = 0; cm->charger_stat[i]; i++) {
1516 if (psy == cm->charger_stat[i]) {
1517 found = true;
1518 break;
1519 }
1520 }
1521
1522 return found;
1523}
1524
1525/**
1526 * cm_notify_event - charger driver notify Charger Manager of charger event
1527 * @psy: pointer to instance of charger's power_supply
1528 * @type: type of charger event
1529 * @msg: optional message passed to uevent_notify fuction
1530 */
1531void cm_notify_event(struct power_supply *psy, enum cm_event_types type,
1532 char *msg)
1533{
1534 struct charger_manager *cm;
1535 bool found_power_supply = false;
1536
1537 if (psy == NULL)
1538 return;
1539
1540 mutex_lock(&cm_list_mtx);
1541 list_for_each_entry(cm, &cm_list, entry) {
1542 found_power_supply = find_power_supply(cm, psy);
1543 if (found_power_supply)
1544 break;
1545 }
1546 mutex_unlock(&cm_list_mtx);
1547
1548 if (!found_power_supply)
1549 return;
1550
1551 switch (type) {
1552 case CM_EVENT_BATT_FULL:
1553 fullbatt_handler(cm);
1554 break;
1555 case CM_EVENT_BATT_OUT:
1556 battout_handler(cm);
1557 break;
1558 case CM_EVENT_BATT_IN:
1559 case CM_EVENT_EXT_PWR_IN_OUT ... CM_EVENT_CHG_START_STOP:
1560 misc_event_handler(cm, type);
1561 break;
1562 case CM_EVENT_UNKNOWN:
1563 case CM_EVENT_OTHERS:
1564 uevent_notify(cm, msg ? msg : default_event_names[type]);
1565 break;
1566 default:
1567 dev_err(cm->dev, "%s type not specified.\n", __func__);
1568 break;
1569 }
1570}
1571EXPORT_SYMBOL_GPL(cm_notify_event);
1572
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001573MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
1574MODULE_DESCRIPTION("Charger Manager");
1575MODULE_LICENSE("GPL");