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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
Joe Perchese5409cb2013-06-06 18:25:12 -070015#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +090017#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>
Chanwoo Choi3950c782012-09-21 18:49:37 +090027#include <linux/sysfs.h>
Jonghwa Lee856ee612013-12-18 15:42:35 +090028#include <linux/of.h>
Jonghwa Lee5c49a622013-12-18 15:42:34 +090029#include <linux/thermal.h>
30
31/*
32 * Default termperature threshold for charging.
33 * Every temperature units are in tenth of centigrade.
34 */
35#define CM_DEFAULT_RECHARGE_TEMP_DIFF 50
36#define CM_DEFAULT_CHARGE_TEMP_MAX 500
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +090037
Chanwoo Choidfeccb12012-05-05 06:26:47 -070038static const char * const default_event_names[] = {
39 [CM_EVENT_UNKNOWN] = "Unknown",
40 [CM_EVENT_BATT_FULL] = "Battery Full",
41 [CM_EVENT_BATT_IN] = "Battery Inserted",
42 [CM_EVENT_BATT_OUT] = "Battery Pulled Out",
Jonghwa Lee5c49a622013-12-18 15:42:34 +090043 [CM_EVENT_BATT_OVERHEAT] = "Battery Overheat",
44 [CM_EVENT_BATT_COLD] = "Battery Cold",
Chanwoo Choidfeccb12012-05-05 06:26:47 -070045 [CM_EVENT_EXT_PWR_IN_OUT] = "External Power Attach/Detach",
46 [CM_EVENT_CHG_START_STOP] = "Charging Start/Stop",
47 [CM_EVENT_OTHERS] = "Other battery events"
48};
49
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +090050/*
51 * Regard CM_JIFFIES_SMALL jiffies is small enough to ignore for
52 * delayed works so that we can run delayed works with CM_JIFFIES_SMALL
53 * without any delays.
54 */
55#define CM_JIFFIES_SMALL (2)
56
57/* If y is valid (> 0) and smaller than x, do x = y */
58#define CM_MIN_VALID(x, y) x = (((y > 0) && ((x) > (y))) ? (y) : (x))
59
60/*
61 * Regard CM_RTC_SMALL (sec) is small enough to ignore error in invoking
62 * rtc alarm. It should be 2 or larger
63 */
64#define CM_RTC_SMALL (2)
65
66#define UEVENT_BUF_SIZE 32
67
68static LIST_HEAD(cm_list);
69static DEFINE_MUTEX(cm_list_mtx);
70
71/* About in-suspend (suspend-again) monitoring */
Jonghwa Leec1155c62014-12-19 17:55:13 +090072static struct alarm *cm_timer;
73
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +090074static bool cm_suspended;
Jonghwa Leec1155c62014-12-19 17:55:13 +090075static bool cm_timer_set;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +090076static unsigned long cm_suspend_duration_ms;
77
Chanwoo Choid829dc72012-05-05 06:24:10 -070078/* About normal (not suspended) monitoring */
79static unsigned long polling_jiffy = ULONG_MAX; /* ULONG_MAX: no polling */
80static unsigned long next_polling; /* Next appointed polling time */
81static struct workqueue_struct *cm_wq; /* init at driver add */
82static struct delayed_work cm_monitor_work; /* init at driver add */
83
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +090084/**
85 * is_batt_present - See if the battery presents in place.
86 * @cm: the Charger Manager representing the battery.
87 */
88static bool is_batt_present(struct charger_manager *cm)
89{
90 union power_supply_propval val;
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +020091 struct power_supply *psy;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +090092 bool present = false;
93 int i, ret;
94
95 switch (cm->desc->battery_present) {
Chanwoo Choid829dc72012-05-05 06:24:10 -070096 case CM_BATTERY_PRESENT:
97 present = true;
98 break;
99 case CM_NO_BATTERY:
100 break;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900101 case CM_FUEL_GAUGE:
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +0200102 psy = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
103 if (!psy)
104 break;
105
Krzysztof Kozlowskib70229b2015-03-12 08:44:10 +0100106 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_PRESENT,
107 &val);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900108 if (ret == 0 && val.intval)
109 present = true;
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100110 power_supply_put(psy);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900111 break;
112 case CM_CHARGER_STAT:
Krzysztof Kozlowskicdaf3e12014-10-13 15:34:31 +0200113 for (i = 0; cm->desc->psy_charger_stat[i]; i++) {
114 psy = power_supply_get_by_name(
115 cm->desc->psy_charger_stat[i]);
116 if (!psy) {
117 dev_err(cm->dev, "Cannot find power supply \"%s\"\n",
118 cm->desc->psy_charger_stat[i]);
119 continue;
120 }
121
Krzysztof Kozlowskib70229b2015-03-12 08:44:10 +0100122 ret = power_supply_get_property(psy,
123 POWER_SUPPLY_PROP_PRESENT, &val);
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100124 power_supply_put(psy);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900125 if (ret == 0 && val.intval) {
126 present = true;
127 break;
128 }
129 }
130 break;
131 }
132
133 return present;
134}
135
136/**
137 * is_ext_pwr_online - See if an external power source is attached to charge
138 * @cm: the Charger Manager representing the battery.
139 *
140 * Returns true if at least one of the chargers of the battery has an external
141 * power source attached to charge the battery regardless of whether it is
142 * actually charging or not.
143 */
144static bool is_ext_pwr_online(struct charger_manager *cm)
145{
146 union power_supply_propval val;
Krzysztof Kozlowskicdaf3e12014-10-13 15:34:31 +0200147 struct power_supply *psy;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900148 bool online = false;
149 int i, ret;
150
151 /* If at least one of them has one, it's yes. */
Krzysztof Kozlowskicdaf3e12014-10-13 15:34:31 +0200152 for (i = 0; cm->desc->psy_charger_stat[i]; i++) {
153 psy = power_supply_get_by_name(cm->desc->psy_charger_stat[i]);
154 if (!psy) {
155 dev_err(cm->dev, "Cannot find power supply \"%s\"\n",
156 cm->desc->psy_charger_stat[i]);
157 continue;
158 }
159
Krzysztof Kozlowskib70229b2015-03-12 08:44:10 +0100160 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_ONLINE,
161 &val);
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100162 power_supply_put(psy);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900163 if (ret == 0 && val.intval) {
164 online = true;
165 break;
166 }
167 }
168
169 return online;
170}
171
172/**
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900173 * get_batt_uV - Get the voltage level of the battery
174 * @cm: the Charger Manager representing the battery.
175 * @uV: the voltage level returned.
176 *
177 * Returns 0 if there is no error.
178 * Returns a negative value on error.
179 */
180static int get_batt_uV(struct charger_manager *cm, int *uV)
181{
182 union power_supply_propval val;
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +0200183 struct power_supply *fuel_gauge;
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900184 int ret;
185
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +0200186 fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
187 if (!fuel_gauge)
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900188 return -ENODEV;
189
Krzysztof Kozlowskib70229b2015-03-12 08:44:10 +0100190 ret = power_supply_get_property(fuel_gauge,
Axel Linbb2a95c2012-01-12 12:56:35 +0800191 POWER_SUPPLY_PROP_VOLTAGE_NOW, &val);
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100192 power_supply_put(fuel_gauge);
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900193 if (ret)
194 return ret;
195
196 *uV = val.intval;
197 return 0;
198}
199
200/**
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900201 * is_charging - Returns true if the battery is being charged.
202 * @cm: the Charger Manager representing the battery.
203 */
204static bool is_charging(struct charger_manager *cm)
205{
206 int i, ret;
207 bool charging = false;
Krzysztof Kozlowskicdaf3e12014-10-13 15:34:31 +0200208 struct power_supply *psy;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900209 union power_supply_propval val;
210
211 /* If there is no battery, it cannot be charged */
212 if (!is_batt_present(cm))
213 return false;
214
215 /* If at least one of the charger is charging, return yes */
Krzysztof Kozlowskicdaf3e12014-10-13 15:34:31 +0200216 for (i = 0; cm->desc->psy_charger_stat[i]; i++) {
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900217 /* 1. The charger sholuld not be DISABLED */
218 if (cm->emergency_stop)
219 continue;
220 if (!cm->charger_enabled)
221 continue;
222
Krzysztof Kozlowskicdaf3e12014-10-13 15:34:31 +0200223 psy = power_supply_get_by_name(cm->desc->psy_charger_stat[i]);
224 if (!psy) {
225 dev_err(cm->dev, "Cannot find power supply \"%s\"\n",
226 cm->desc->psy_charger_stat[i]);
227 continue;
228 }
229
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900230 /* 2. The charger should be online (ext-power) */
Krzysztof Kozlowskib70229b2015-03-12 08:44:10 +0100231 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_ONLINE,
232 &val);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900233 if (ret) {
Joe Perchese5409cb2013-06-06 18:25:12 -0700234 dev_warn(cm->dev, "Cannot read ONLINE value from %s\n",
235 cm->desc->psy_charger_stat[i]);
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100236 power_supply_put(psy);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900237 continue;
238 }
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100239 if (val.intval == 0) {
240 power_supply_put(psy);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900241 continue;
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100242 }
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900243
244 /*
245 * 3. The charger should not be FULL, DISCHARGING,
246 * or NOT_CHARGING.
247 */
Krzysztof Kozlowskib70229b2015-03-12 08:44:10 +0100248 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_STATUS,
249 &val);
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100250 power_supply_put(psy);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900251 if (ret) {
Joe Perchese5409cb2013-06-06 18:25:12 -0700252 dev_warn(cm->dev, "Cannot read STATUS value from %s\n",
253 cm->desc->psy_charger_stat[i]);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900254 continue;
255 }
256 if (val.intval == POWER_SUPPLY_STATUS_FULL ||
257 val.intval == POWER_SUPPLY_STATUS_DISCHARGING ||
258 val.intval == POWER_SUPPLY_STATUS_NOT_CHARGING)
259 continue;
260
261 /* Then, this is charging. */
262 charging = true;
263 break;
264 }
265
266 return charging;
267}
268
269/**
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900270 * is_full_charged - Returns true if the battery is fully charged.
271 * @cm: the Charger Manager representing the battery.
272 */
273static bool is_full_charged(struct charger_manager *cm)
274{
275 struct charger_desc *desc = cm->desc;
276 union power_supply_propval val;
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +0200277 struct power_supply *fuel_gauge;
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100278 bool is_full = false;
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900279 int ret = 0;
280 int uV;
281
282 /* If there is no battery, it cannot be charged */
Chanwoo Choi0fa11db2012-11-22 16:53:46 +0900283 if (!is_batt_present(cm))
284 return false;
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900285
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +0200286 fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
287 if (!fuel_gauge)
288 return false;
289
290 if (desc->fullbatt_full_capacity > 0) {
Chanwoo Choi0fa11db2012-11-22 16:53:46 +0900291 val.intval = 0;
292
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900293 /* Not full if capacity of fuel gauge isn't full */
Krzysztof Kozlowskib70229b2015-03-12 08:44:10 +0100294 ret = power_supply_get_property(fuel_gauge,
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900295 POWER_SUPPLY_PROP_CHARGE_FULL, &val);
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100296 if (!ret && val.intval > desc->fullbatt_full_capacity) {
297 is_full = true;
298 goto out;
299 }
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900300 }
301
302 /* Full, if it's over the fullbatt voltage */
303 if (desc->fullbatt_uV > 0) {
304 ret = get_batt_uV(cm, &uV);
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100305 if (!ret && uV >= desc->fullbatt_uV) {
306 is_full = true;
307 goto out;
308 }
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900309 }
310
311 /* Full, if the capacity is more than fullbatt_soc */
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +0200312 if (desc->fullbatt_soc > 0) {
Chanwoo Choi0fa11db2012-11-22 16:53:46 +0900313 val.intval = 0;
314
Krzysztof Kozlowskib70229b2015-03-12 08:44:10 +0100315 ret = power_supply_get_property(fuel_gauge,
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900316 POWER_SUPPLY_PROP_CAPACITY, &val);
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100317 if (!ret && val.intval >= desc->fullbatt_soc) {
318 is_full = true;
319 goto out;
320 }
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900321 }
322
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100323out:
324 power_supply_put(fuel_gauge);
325 return is_full;
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900326}
327
328/**
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900329 * is_polling_required - Return true if need to continue polling for this CM.
330 * @cm: the Charger Manager representing the battery.
331 */
332static bool is_polling_required(struct charger_manager *cm)
333{
334 switch (cm->desc->polling_mode) {
335 case CM_POLL_DISABLE:
336 return false;
337 case CM_POLL_ALWAYS:
338 return true;
339 case CM_POLL_EXTERNAL_POWER_ONLY:
340 return is_ext_pwr_online(cm);
341 case CM_POLL_CHARGING_ONLY:
342 return is_charging(cm);
343 default:
344 dev_warn(cm->dev, "Incorrect polling_mode (%d)\n",
Joe Perchese5409cb2013-06-06 18:25:12 -0700345 cm->desc->polling_mode);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900346 }
347
348 return false;
349}
350
351/**
352 * try_charger_enable - Enable/Disable chargers altogether
353 * @cm: the Charger Manager representing the battery.
354 * @enable: true: enable / false: disable
355 *
356 * Note that Charger Manager keeps the charger enabled regardless whether
357 * the charger is charging or not (because battery is full or no external
358 * power source exists) except when CM needs to disable chargers forcibly
359 * bacause of emergency causes; when the battery is overheated or too cold.
360 */
361static int try_charger_enable(struct charger_manager *cm, bool enable)
362{
363 int err = 0, i;
364 struct charger_desc *desc = cm->desc;
365
366 /* Ignore if it's redundent command */
Axel Linbb2a95c2012-01-12 12:56:35 +0800367 if (enable == cm->charger_enabled)
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900368 return 0;
369
370 if (enable) {
371 if (cm->emergency_stop)
372 return -EAGAIN;
Chanwoo Choi8fcfe082012-09-20 21:20:05 -0700373
374 /*
375 * Save start time of charging to limit
376 * maximum possible charging time.
377 */
378 cm->charging_start_time = ktime_to_ms(ktime_get());
379 cm->charging_end_time = 0;
380
Chanwoo Choidbb61fc2012-07-27 14:01:34 +0900381 for (i = 0 ; i < desc->num_charger_regulators ; i++) {
Chanwoo Choi3950c782012-09-21 18:49:37 +0900382 if (desc->charger_regulators[i].externally_control)
383 continue;
384
Chanwoo Choidbb61fc2012-07-27 14:01:34 +0900385 err = regulator_enable(desc->charger_regulators[i].consumer);
386 if (err < 0) {
Joe Perchese5409cb2013-06-06 18:25:12 -0700387 dev_warn(cm->dev, "Cannot enable %s regulator\n",
388 desc->charger_regulators[i].regulator_name);
Chanwoo Choidbb61fc2012-07-27 14:01:34 +0900389 }
390 }
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900391 } else {
392 /*
Chanwoo Choi8fcfe082012-09-20 21:20:05 -0700393 * Save end time of charging to maintain fully charged state
394 * of battery after full-batt.
395 */
396 cm->charging_start_time = 0;
397 cm->charging_end_time = ktime_to_ms(ktime_get());
398
Chanwoo Choidbb61fc2012-07-27 14:01:34 +0900399 for (i = 0 ; i < desc->num_charger_regulators ; i++) {
Chanwoo Choi3950c782012-09-21 18:49:37 +0900400 if (desc->charger_regulators[i].externally_control)
401 continue;
402
Chanwoo Choidbb61fc2012-07-27 14:01:34 +0900403 err = regulator_disable(desc->charger_regulators[i].consumer);
404 if (err < 0) {
Joe Perchese5409cb2013-06-06 18:25:12 -0700405 dev_warn(cm->dev, "Cannot disable %s regulator\n",
406 desc->charger_regulators[i].regulator_name);
Chanwoo Choidbb61fc2012-07-27 14:01:34 +0900407 }
408 }
409
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900410 /*
411 * Abnormal battery state - Stop charging forcibly,
412 * even if charger was enabled at the other places
413 */
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900414 for (i = 0; i < desc->num_charger_regulators; i++) {
415 if (regulator_is_enabled(
416 desc->charger_regulators[i].consumer)) {
417 regulator_force_disable(
418 desc->charger_regulators[i].consumer);
Joe Perchese5409cb2013-06-06 18:25:12 -0700419 dev_warn(cm->dev, "Disable regulator(%s) forcibly\n",
420 desc->charger_regulators[i].regulator_name);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900421 }
422 }
423 }
424
425 if (!err)
426 cm->charger_enabled = enable;
427
428 return err;
429}
430
431/**
Chanwoo Choid829dc72012-05-05 06:24:10 -0700432 * try_charger_restart - Restart charging.
433 * @cm: the Charger Manager representing the battery.
434 *
435 * Restart charging by turning off and on the charger.
436 */
437static int try_charger_restart(struct charger_manager *cm)
438{
439 int err;
440
441 if (cm->emergency_stop)
442 return -EAGAIN;
443
444 err = try_charger_enable(cm, false);
445 if (err)
446 return err;
447
448 return try_charger_enable(cm, true);
449}
450
451/**
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900452 * uevent_notify - Let users know something has changed.
453 * @cm: the Charger Manager representing the battery.
454 * @event: the event string.
455 *
456 * If @event is null, it implies that uevent_notify is called
457 * by resume function. When called in the resume function, cm_suspended
458 * should be already reset to false in order to let uevent_notify
459 * notify the recent event during the suspend to users. While
460 * suspended, uevent_notify does not notify users, but tracks
461 * events so that uevent_notify can notify users later after resumed.
462 */
463static void uevent_notify(struct charger_manager *cm, const char *event)
464{
465 static char env_str[UEVENT_BUF_SIZE + 1] = "";
466 static char env_str_save[UEVENT_BUF_SIZE + 1] = "";
467
468 if (cm_suspended) {
469 /* Nothing in suspended-event buffer */
470 if (env_str_save[0] == 0) {
471 if (!strncmp(env_str, event, UEVENT_BUF_SIZE))
472 return; /* status not changed */
473 strncpy(env_str_save, event, UEVENT_BUF_SIZE);
474 return;
475 }
476
477 if (!strncmp(env_str_save, event, UEVENT_BUF_SIZE))
478 return; /* Duplicated. */
Axel Linbb2a95c2012-01-12 12:56:35 +0800479 strncpy(env_str_save, event, UEVENT_BUF_SIZE);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900480 return;
481 }
482
483 if (event == NULL) {
484 /* No messages pending */
485 if (!env_str_save[0])
486 return;
487
488 strncpy(env_str, env_str_save, UEVENT_BUF_SIZE);
489 kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE);
490 env_str_save[0] = 0;
491
492 return;
493 }
494
495 /* status not changed */
496 if (!strncmp(env_str, event, UEVENT_BUF_SIZE))
497 return;
498
499 /* save the status and notify the update */
500 strncpy(env_str, event, UEVENT_BUF_SIZE);
501 kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE);
502
Joe Perchese5409cb2013-06-06 18:25:12 -0700503 dev_info(cm->dev, "%s\n", event);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900504}
505
506/**
Chanwoo Choid829dc72012-05-05 06:24:10 -0700507 * fullbatt_vchk - Check voltage drop some times after "FULL" event.
508 * @work: the work_struct appointing the function
509 *
510 * If a user has designated "fullbatt_vchkdrop_ms/uV" values with
511 * charger_desc, Charger Manager checks voltage drop after the battery
512 * "FULL" event. It checks whether the voltage has dropped more than
513 * fullbatt_vchkdrop_uV by calling this function after fullbatt_vchkrop_ms.
514 */
515static void fullbatt_vchk(struct work_struct *work)
516{
517 struct delayed_work *dwork = to_delayed_work(work);
518 struct charger_manager *cm = container_of(dwork,
519 struct charger_manager, fullbatt_vchk_work);
520 struct charger_desc *desc = cm->desc;
521 int batt_uV, err, diff;
522
523 /* remove the appointment for fullbatt_vchk */
524 cm->fullbatt_vchk_jiffies_at = 0;
525
526 if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms)
527 return;
528
529 err = get_batt_uV(cm, &batt_uV);
530 if (err) {
Joe Perchese5409cb2013-06-06 18:25:12 -0700531 dev_err(cm->dev, "%s: get_batt_uV error(%d)\n", __func__, err);
Chanwoo Choid829dc72012-05-05 06:24:10 -0700532 return;
533 }
534
Chanwoo Choif36b9dd2012-11-22 16:53:51 +0900535 diff = desc->fullbatt_uV - batt_uV;
536 if (diff < 0)
537 return;
Chanwoo Choid829dc72012-05-05 06:24:10 -0700538
Joe Perchese5409cb2013-06-06 18:25:12 -0700539 dev_info(cm->dev, "VBATT dropped %duV after full-batt\n", diff);
Chanwoo Choid829dc72012-05-05 06:24:10 -0700540
541 if (diff > desc->fullbatt_vchkdrop_uV) {
542 try_charger_restart(cm);
Chanwoo Choi8fcfe082012-09-20 21:20:05 -0700543 uevent_notify(cm, "Recharging");
Chanwoo Choid829dc72012-05-05 06:24:10 -0700544 }
545}
546
547/**
Chanwoo Choi8fcfe082012-09-20 21:20:05 -0700548 * check_charging_duration - Monitor charging/discharging duration
549 * @cm: the Charger Manager representing the battery.
550 *
551 * If whole charging duration exceed 'charging_max_duration_ms',
552 * cm stop charging to prevent overcharge/overheat. If discharging
553 * duration exceed 'discharging _max_duration_ms', charger cable is
554 * attached, after full-batt, cm start charging to maintain fully
555 * charged state for battery.
556 */
557static int check_charging_duration(struct charger_manager *cm)
558{
559 struct charger_desc *desc = cm->desc;
560 u64 curr = ktime_to_ms(ktime_get());
561 u64 duration;
562 int ret = false;
563
564 if (!desc->charging_max_duration_ms &&
565 !desc->discharging_max_duration_ms)
566 return ret;
567
568 if (cm->charger_enabled) {
569 duration = curr - cm->charging_start_time;
570
571 if (duration > desc->charging_max_duration_ms) {
Jonghwa Lee856ee612013-12-18 15:42:35 +0900572 dev_info(cm->dev, "Charging duration exceed %ums\n",
Chanwoo Choi8fcfe082012-09-20 21:20:05 -0700573 desc->charging_max_duration_ms);
574 uevent_notify(cm, "Discharging");
575 try_charger_enable(cm, false);
576 ret = true;
577 }
578 } else if (is_ext_pwr_online(cm) && !cm->charger_enabled) {
579 duration = curr - cm->charging_end_time;
580
581 if (duration > desc->charging_max_duration_ms &&
582 is_ext_pwr_online(cm)) {
Jonghwa Lee856ee612013-12-18 15:42:35 +0900583 dev_info(cm->dev, "Discharging duration exceed %ums\n",
Chanwoo Choi8fcfe082012-09-20 21:20:05 -0700584 desc->discharging_max_duration_ms);
Joe Perchese5409cb2013-06-06 18:25:12 -0700585 uevent_notify(cm, "Recharging");
Chanwoo Choi8fcfe082012-09-20 21:20:05 -0700586 try_charger_enable(cm, true);
587 ret = true;
588 }
589 }
590
591 return ret;
592}
593
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +0200594static int cm_get_battery_temperature_by_psy(struct charger_manager *cm,
595 int *temp)
596{
597 struct power_supply *fuel_gauge;
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100598 int ret;
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +0200599
600 fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
601 if (!fuel_gauge)
602 return -ENODEV;
603
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100604 ret = power_supply_get_property(fuel_gauge,
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +0200605 POWER_SUPPLY_PROP_TEMP,
606 (union power_supply_propval *)temp);
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100607 power_supply_put(fuel_gauge);
608
609 return ret;
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +0200610}
611
Jonghwa Lee5c49a622013-12-18 15:42:34 +0900612static int cm_get_battery_temperature(struct charger_manager *cm,
613 int *temp)
614{
615 int ret;
616
617 if (!cm->desc->measure_battery_temp)
618 return -ENODEV;
619
620#ifdef CONFIG_THERMAL
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +0200621 if (cm->tzd_batt) {
Sascha Hauer17e83512015-07-24 08:12:54 +0200622 ret = thermal_zone_get_temp(cm->tzd_batt, temp);
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +0200623 if (!ret)
624 /* Calibrate temperature unit */
625 *temp /= 100;
626 } else
Jonghwa Lee5c49a622013-12-18 15:42:34 +0900627#endif
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +0200628 {
629 /* if-else continued from CONFIG_THERMAL */
630 ret = cm_get_battery_temperature_by_psy(cm, temp);
631 }
632
Jonghwa Lee5c49a622013-12-18 15:42:34 +0900633 return ret;
634}
635
636static int cm_check_thermal_status(struct charger_manager *cm)
637{
638 struct charger_desc *desc = cm->desc;
639 int temp, upper_limit, lower_limit;
640 int ret = 0;
641
642 ret = cm_get_battery_temperature(cm, &temp);
643 if (ret) {
644 /* FIXME:
645 * No information of battery temperature might
646 * occur hazadous result. We have to handle it
647 * depending on battery type.
648 */
649 dev_err(cm->dev, "Failed to get battery temperature\n");
650 return 0;
651 }
652
653 upper_limit = desc->temp_max;
654 lower_limit = desc->temp_min;
655
656 if (cm->emergency_stop) {
657 upper_limit -= desc->temp_diff;
658 lower_limit += desc->temp_diff;
659 }
660
661 if (temp > upper_limit)
662 ret = CM_EVENT_BATT_OVERHEAT;
663 else if (temp < lower_limit)
664 ret = CM_EVENT_BATT_COLD;
665
666 return ret;
667}
668
Chanwoo Choi8fcfe082012-09-20 21:20:05 -0700669/**
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900670 * _cm_monitor - Monitor the temperature and return true for exceptions.
671 * @cm: the Charger Manager representing the battery.
672 *
673 * Returns true if there is an event to notify for the battery.
674 * (True if the status of "emergency_stop" changes)
675 */
676static bool _cm_monitor(struct charger_manager *cm)
677{
Jonghwa Lee5c49a622013-12-18 15:42:34 +0900678 int temp_alrt;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900679
Jonghwa Lee5c49a622013-12-18 15:42:34 +0900680 temp_alrt = cm_check_thermal_status(cm);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900681
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900682 /* It has been stopped already */
Jonghwa Lee5c49a622013-12-18 15:42:34 +0900683 if (temp_alrt && cm->emergency_stop)
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900684 return false;
685
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900686 /*
687 * Check temperature whether overheat or cold.
688 * If temperature is out of range normal state, stop charging.
689 */
Jonghwa Lee5c49a622013-12-18 15:42:34 +0900690 if (temp_alrt) {
691 cm->emergency_stop = temp_alrt;
692 if (!try_charger_enable(cm, false))
693 uevent_notify(cm, default_event_names[temp_alrt]);
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900694
695 /*
Chanwoo Choi8fcfe082012-09-20 21:20:05 -0700696 * Check whole charging duration and discharing duration
697 * after full-batt.
698 */
699 } else if (!cm->emergency_stop && check_charging_duration(cm)) {
700 dev_dbg(cm->dev,
Joe Perchese5409cb2013-06-06 18:25:12 -0700701 "Charging/Discharging duration is out of range\n");
Chanwoo Choi8fcfe082012-09-20 21:20:05 -0700702 /*
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900703 * Check dropped voltage of battery. If battery voltage is more
704 * dropped than fullbatt_vchkdrop_uV after fully charged state,
705 * charger-manager have to recharge battery.
706 */
707 } else if (!cm->emergency_stop && is_ext_pwr_online(cm) &&
708 !cm->charger_enabled) {
709 fullbatt_vchk(&cm->fullbatt_vchk_work.work);
710
711 /*
712 * Check whether fully charged state to protect overcharge
713 * if charger-manager is charging for battery.
714 */
715 } else if (!cm->emergency_stop && is_full_charged(cm) &&
716 cm->charger_enabled) {
Joe Perchese5409cb2013-06-06 18:25:12 -0700717 dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged\n");
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900718 uevent_notify(cm, default_event_names[CM_EVENT_BATT_FULL]);
719
720 try_charger_enable(cm, false);
721
722 fullbatt_vchk(&cm->fullbatt_vchk_work.work);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900723 } else {
724 cm->emergency_stop = 0;
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900725 if (is_ext_pwr_online(cm)) {
726 if (!try_charger_enable(cm, true))
727 uevent_notify(cm, "CHARGING");
728 }
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900729 }
730
731 return true;
732}
733
734/**
735 * cm_monitor - Monitor every battery.
736 *
737 * Returns true if there is an event to notify from any of the batteries.
738 * (True if the status of "emergency_stop" changes)
739 */
740static bool cm_monitor(void)
741{
742 bool stop = false;
743 struct charger_manager *cm;
744
745 mutex_lock(&cm_list_mtx);
746
Axel Linbb2a95c2012-01-12 12:56:35 +0800747 list_for_each_entry(cm, &cm_list, entry) {
748 if (_cm_monitor(cm))
749 stop = true;
750 }
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +0900751
752 mutex_unlock(&cm_list_mtx);
753
754 return stop;
755}
756
Chanwoo Choid829dc72012-05-05 06:24:10 -0700757/**
758 * _setup_polling - Setup the next instance of polling.
759 * @work: work_struct of the function _setup_polling.
760 */
761static void _setup_polling(struct work_struct *work)
762{
763 unsigned long min = ULONG_MAX;
764 struct charger_manager *cm;
765 bool keep_polling = false;
766 unsigned long _next_polling;
767
768 mutex_lock(&cm_list_mtx);
769
770 list_for_each_entry(cm, &cm_list, entry) {
771 if (is_polling_required(cm) && cm->desc->polling_interval_ms) {
772 keep_polling = true;
773
774 if (min > cm->desc->polling_interval_ms)
775 min = cm->desc->polling_interval_ms;
776 }
777 }
778
779 polling_jiffy = msecs_to_jiffies(min);
780 if (polling_jiffy <= CM_JIFFIES_SMALL)
781 polling_jiffy = CM_JIFFIES_SMALL + 1;
782
783 if (!keep_polling)
784 polling_jiffy = ULONG_MAX;
785 if (polling_jiffy == ULONG_MAX)
786 goto out;
787
788 WARN(cm_wq == NULL, "charger-manager: workqueue not initialized"
789 ". try it later. %s\n", __func__);
790
Tejun Heo2fbb5202012-12-21 17:56:51 -0800791 /*
792 * Use mod_delayed_work() iff the next polling interval should
793 * occur before the currently scheduled one. If @cm_monitor_work
794 * isn't active, the end result is the same, so no need to worry
795 * about stale @next_polling.
796 */
Chanwoo Choid829dc72012-05-05 06:24:10 -0700797 _next_polling = jiffies + polling_jiffy;
798
Tejun Heo2fbb5202012-12-21 17:56:51 -0800799 if (time_before(_next_polling, next_polling)) {
Tejun Heo41f63c52012-08-03 10:30:47 -0700800 mod_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy);
Tejun Heo2fbb5202012-12-21 17:56:51 -0800801 next_polling = _next_polling;
802 } else {
803 if (queue_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy))
804 next_polling = _next_polling;
Chanwoo Choid829dc72012-05-05 06:24:10 -0700805 }
Chanwoo Choid829dc72012-05-05 06:24:10 -0700806out:
807 mutex_unlock(&cm_list_mtx);
808}
809static DECLARE_WORK(setup_polling, _setup_polling);
810
811/**
812 * cm_monitor_poller - The Monitor / Poller.
813 * @work: work_struct of the function cm_monitor_poller
814 *
815 * During non-suspended state, cm_monitor_poller is used to poll and monitor
816 * the batteries.
817 */
818static void cm_monitor_poller(struct work_struct *work)
819{
820 cm_monitor();
821 schedule_work(&setup_polling);
822}
823
Chanwoo Choidfeccb12012-05-05 06:26:47 -0700824/**
825 * fullbatt_handler - Event handler for CM_EVENT_BATT_FULL
826 * @cm: the Charger Manager representing the battery.
827 */
828static void fullbatt_handler(struct charger_manager *cm)
829{
830 struct charger_desc *desc = cm->desc;
831
832 if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms)
833 goto out;
834
835 if (cm_suspended)
836 device_set_wakeup_capable(cm->dev, true);
837
Tejun Heo41f63c52012-08-03 10:30:47 -0700838 mod_delayed_work(cm_wq, &cm->fullbatt_vchk_work,
839 msecs_to_jiffies(desc->fullbatt_vchkdrop_ms));
Chanwoo Choidfeccb12012-05-05 06:26:47 -0700840 cm->fullbatt_vchk_jiffies_at = jiffies + msecs_to_jiffies(
841 desc->fullbatt_vchkdrop_ms);
842
843 if (cm->fullbatt_vchk_jiffies_at == 0)
844 cm->fullbatt_vchk_jiffies_at = 1;
845
846out:
Joe Perchese5409cb2013-06-06 18:25:12 -0700847 dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged\n");
Chanwoo Choidfeccb12012-05-05 06:26:47 -0700848 uevent_notify(cm, default_event_names[CM_EVENT_BATT_FULL]);
849}
850
851/**
852 * battout_handler - Event handler for CM_EVENT_BATT_OUT
853 * @cm: the Charger Manager representing the battery.
854 */
855static void battout_handler(struct charger_manager *cm)
856{
857 if (cm_suspended)
858 device_set_wakeup_capable(cm->dev, true);
859
860 if (!is_batt_present(cm)) {
861 dev_emerg(cm->dev, "Battery Pulled Out!\n");
862 uevent_notify(cm, default_event_names[CM_EVENT_BATT_OUT]);
863 } else {
864 uevent_notify(cm, "Battery Reinserted?");
865 }
866}
867
868/**
869 * misc_event_handler - Handler for other evnets
870 * @cm: the Charger Manager representing the battery.
871 * @type: the Charger Manager representing the battery.
872 */
873static void misc_event_handler(struct charger_manager *cm,
874 enum cm_event_types type)
875{
876 if (cm_suspended)
877 device_set_wakeup_capable(cm->dev, true);
878
Tejun Heo2fbb5202012-12-21 17:56:51 -0800879 if (is_polling_required(cm) && cm->desc->polling_interval_ms)
Chanwoo Choidfeccb12012-05-05 06:26:47 -0700880 schedule_work(&setup_polling);
881 uevent_notify(cm, default_event_names[type]);
882}
883
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900884static int charger_get_property(struct power_supply *psy,
885 enum power_supply_property psp,
886 union power_supply_propval *val)
887{
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +0100888 struct charger_manager *cm = power_supply_get_drvdata(psy);
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900889 struct charger_desc *desc = cm->desc;
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100890 struct power_supply *fuel_gauge = NULL;
Anton Vorontsovdf58c042012-03-15 21:01:28 +0400891 int ret = 0;
892 int uV;
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900893
894 switch (psp) {
895 case POWER_SUPPLY_PROP_STATUS:
896 if (is_charging(cm))
897 val->intval = POWER_SUPPLY_STATUS_CHARGING;
898 else if (is_ext_pwr_online(cm))
899 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
900 else
901 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
902 break;
903 case POWER_SUPPLY_PROP_HEALTH:
904 if (cm->emergency_stop > 0)
905 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
906 else if (cm->emergency_stop < 0)
907 val->intval = POWER_SUPPLY_HEALTH_COLD;
908 else
909 val->intval = POWER_SUPPLY_HEALTH_GOOD;
910 break;
911 case POWER_SUPPLY_PROP_PRESENT:
912 if (is_batt_present(cm))
913 val->intval = 1;
914 else
915 val->intval = 0;
916 break;
917 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
Anton Vorontsovdf58c042012-03-15 21:01:28 +0400918 ret = get_batt_uV(cm, &val->intval);
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900919 break;
920 case POWER_SUPPLY_PROP_CURRENT_NOW:
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +0200921 fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
922 if (!fuel_gauge) {
923 ret = -ENODEV;
924 break;
925 }
Krzysztof Kozlowskib70229b2015-03-12 08:44:10 +0100926 ret = power_supply_get_property(fuel_gauge,
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900927 POWER_SUPPLY_PROP_CURRENT_NOW, val);
928 break;
929 case POWER_SUPPLY_PROP_TEMP:
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900930 case POWER_SUPPLY_PROP_TEMP_AMBIENT:
Jonghwa Lee5c49a622013-12-18 15:42:34 +0900931 return cm_get_battery_temperature(cm, &val->intval);
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900932 case POWER_SUPPLY_PROP_CAPACITY:
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900933 if (!is_batt_present(cm)) {
934 /* There is no battery. Assume 100% */
935 val->intval = 100;
936 break;
937 }
938
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +0100939 fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
940 if (!fuel_gauge) {
941 ret = -ENODEV;
942 break;
943 }
944
Krzysztof Kozlowskib70229b2015-03-12 08:44:10 +0100945 ret = power_supply_get_property(fuel_gauge,
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900946 POWER_SUPPLY_PROP_CAPACITY, val);
947 if (ret)
948 break;
949
950 if (val->intval > 100) {
951 val->intval = 100;
952 break;
953 }
954 if (val->intval < 0)
955 val->intval = 0;
956
957 /* Do not adjust SOC when charging: voltage is overrated */
958 if (is_charging(cm))
959 break;
960
961 /*
962 * If the capacity value is inconsistent, calibrate it base on
963 * the battery voltage values and the thresholds given as desc
964 */
965 ret = get_batt_uV(cm, &uV);
966 if (ret) {
967 /* Voltage information not available. No calibration */
968 ret = 0;
969 break;
970 }
971
972 if (desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV &&
973 !is_charging(cm)) {
974 val->intval = 100;
975 break;
976 }
977
978 break;
979 case POWER_SUPPLY_PROP_ONLINE:
980 if (is_ext_pwr_online(cm))
981 val->intval = 1;
982 else
983 val->intval = 0;
984 break;
985 case POWER_SUPPLY_PROP_CHARGE_FULL:
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900986 if (is_full_charged(cm))
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900987 val->intval = 1;
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +0900988 else
989 val->intval = 0;
Donggeun Kimad3d13ee2011-12-27 18:47:49 +0900990 ret = 0;
991 break;
992 case POWER_SUPPLY_PROP_CHARGE_NOW:
993 if (is_charging(cm)) {
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +0200994 fuel_gauge = power_supply_get_by_name(
995 cm->desc->psy_fuel_gauge);
996 if (!fuel_gauge) {
997 ret = -ENODEV;
998 break;
999 }
1000
Krzysztof Kozlowskib70229b2015-03-12 08:44:10 +01001001 ret = power_supply_get_property(fuel_gauge,
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001002 POWER_SUPPLY_PROP_CHARGE_NOW,
1003 val);
1004 if (ret) {
1005 val->intval = 1;
1006 ret = 0;
1007 } else {
1008 /* If CHARGE_NOW is supplied, use it */
1009 val->intval = (val->intval > 0) ?
1010 val->intval : 1;
1011 }
1012 } else {
1013 val->intval = 0;
1014 }
1015 break;
1016 default:
1017 return -EINVAL;
1018 }
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +01001019 if (fuel_gauge)
1020 power_supply_put(fuel_gauge);
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001021 return ret;
1022}
1023
1024#define NUM_CHARGER_PSY_OPTIONAL (4)
1025static enum power_supply_property default_charger_props[] = {
1026 /* Guaranteed to provide */
1027 POWER_SUPPLY_PROP_STATUS,
1028 POWER_SUPPLY_PROP_HEALTH,
1029 POWER_SUPPLY_PROP_PRESENT,
1030 POWER_SUPPLY_PROP_VOLTAGE_NOW,
1031 POWER_SUPPLY_PROP_CAPACITY,
1032 POWER_SUPPLY_PROP_ONLINE,
1033 POWER_SUPPLY_PROP_CHARGE_FULL,
1034 /*
1035 * Optional properties are:
1036 * POWER_SUPPLY_PROP_CHARGE_NOW,
1037 * POWER_SUPPLY_PROP_CURRENT_NOW,
1038 * POWER_SUPPLY_PROP_TEMP, and
1039 * POWER_SUPPLY_PROP_TEMP_AMBIENT,
1040 */
1041};
1042
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001043static const struct power_supply_desc psy_default = {
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001044 .name = "battery",
1045 .type = POWER_SUPPLY_TYPE_BATTERY,
1046 .properties = default_charger_props,
1047 .num_properties = ARRAY_SIZE(default_charger_props),
1048 .get_property = charger_get_property,
Krzysztof Kozlowskiba9c9182014-10-07 17:47:37 +02001049 .no_thermal = true,
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001050};
1051
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001052/**
1053 * cm_setup_timer - For in-suspend monitoring setup wakeup alarm
1054 * for suspend_again.
1055 *
1056 * Returns true if the alarm is set for Charger Manager to use.
1057 * Returns false if
1058 * cm_setup_timer fails to set an alarm,
1059 * cm_setup_timer does not need to set an alarm for Charger Manager,
1060 * or an alarm previously configured is to be used.
1061 */
1062static bool cm_setup_timer(void)
1063{
1064 struct charger_manager *cm;
1065 unsigned int wakeup_ms = UINT_MAX;
Jonghwa Leec1155c62014-12-19 17:55:13 +09001066 int timer_req = 0;
1067
1068 if (time_after(next_polling, jiffies))
1069 CM_MIN_VALID(wakeup_ms,
1070 jiffies_to_msecs(next_polling - jiffies));
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001071
1072 mutex_lock(&cm_list_mtx);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001073 list_for_each_entry(cm, &cm_list, entry) {
Chanwoo Choid829dc72012-05-05 06:24:10 -07001074 unsigned int fbchk_ms = 0;
1075
1076 /* fullbatt_vchk is required. setup timer for that */
1077 if (cm->fullbatt_vchk_jiffies_at) {
1078 fbchk_ms = jiffies_to_msecs(cm->fullbatt_vchk_jiffies_at
1079 - jiffies);
1080 if (time_is_before_eq_jiffies(
1081 cm->fullbatt_vchk_jiffies_at) ||
1082 msecs_to_jiffies(fbchk_ms) < CM_JIFFIES_SMALL) {
1083 fullbatt_vchk(&cm->fullbatt_vchk_work.work);
1084 fbchk_ms = 0;
1085 }
1086 }
1087 CM_MIN_VALID(wakeup_ms, fbchk_ms);
1088
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001089 /* Skip if polling is not required for this CM */
1090 if (!is_polling_required(cm) && !cm->emergency_stop)
1091 continue;
Jonghwa Leec1155c62014-12-19 17:55:13 +09001092 timer_req++;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001093 if (cm->desc->polling_interval_ms == 0)
1094 continue;
1095 CM_MIN_VALID(wakeup_ms, cm->desc->polling_interval_ms);
1096 }
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001097 mutex_unlock(&cm_list_mtx);
1098
Jonghwa Leec1155c62014-12-19 17:55:13 +09001099 if (timer_req && cm_timer) {
1100 ktime_t now, add;
1101
1102 /*
1103 * Set alarm with the polling interval (wakeup_ms)
1104 * The alarm time should be NOW + CM_RTC_SMALL or later.
1105 */
1106 if (wakeup_ms == UINT_MAX ||
1107 wakeup_ms < CM_RTC_SMALL * MSEC_PER_SEC)
1108 wakeup_ms = 2 * CM_RTC_SMALL * MSEC_PER_SEC;
1109
Joe Perchese5409cb2013-06-06 18:25:12 -07001110 pr_info("Charger Manager wakeup timer: %u ms\n", wakeup_ms);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001111
Jonghwa Leec1155c62014-12-19 17:55:13 +09001112 now = ktime_get_boottime();
1113 add = ktime_set(wakeup_ms / MSEC_PER_SEC,
1114 (wakeup_ms % MSEC_PER_SEC) * NSEC_PER_MSEC);
1115 alarm_start(cm_timer, ktime_add(now, add));
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001116
Jonghwa Leec1155c62014-12-19 17:55:13 +09001117 cm_suspend_duration_ms = wakeup_ms;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001118
Jonghwa Leec1155c62014-12-19 17:55:13 +09001119 return true;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001120 }
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001121 return false;
1122}
1123
Chanwoo Choibee737b2012-07-12 15:03:25 +09001124/**
1125 * charger_extcon_work - enable/diable charger according to the state
1126 * of charger cable
1127 *
1128 * @work: work_struct of the function charger_extcon_work.
1129 */
1130static void charger_extcon_work(struct work_struct *work)
1131{
1132 struct charger_cable *cable =
1133 container_of(work, struct charger_cable, wq);
Chanwoo Choi45cd4fb2012-07-12 15:03:29 +09001134 int ret;
1135
1136 if (cable->attached && cable->min_uA != 0 && cable->max_uA != 0) {
1137 ret = regulator_set_current_limit(cable->charger->consumer,
1138 cable->min_uA, cable->max_uA);
1139 if (ret < 0) {
1140 pr_err("Cannot set current limit of %s (%s)\n",
Joe Perchese5409cb2013-06-06 18:25:12 -07001141 cable->charger->regulator_name, cable->name);
Chanwoo Choi45cd4fb2012-07-12 15:03:29 +09001142 return;
1143 }
1144
1145 pr_info("Set current limit of %s : %duA ~ %duA\n",
Joe Perchese5409cb2013-06-06 18:25:12 -07001146 cable->charger->regulator_name,
1147 cable->min_uA, cable->max_uA);
Chanwoo Choi45cd4fb2012-07-12 15:03:29 +09001148 }
Chanwoo Choibee737b2012-07-12 15:03:25 +09001149
1150 try_charger_enable(cable->cm, cable->attached);
1151}
1152
1153/**
1154 * charger_extcon_notifier - receive the state of charger cable
1155 * when registered cable is attached or detached.
1156 *
1157 * @self: the notifier block of the charger_extcon_notifier.
1158 * @event: the cable state.
1159 * @ptr: the data pointer of notifier block.
1160 */
1161static int charger_extcon_notifier(struct notifier_block *self,
1162 unsigned long event, void *ptr)
1163{
1164 struct charger_cable *cable =
1165 container_of(self, struct charger_cable, nb);
1166
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +09001167 /*
1168 * The newly state of charger cable.
1169 * If cable is attached, cable->attached is true.
1170 */
Chanwoo Choibee737b2012-07-12 15:03:25 +09001171 cable->attached = event;
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +09001172
1173 /*
1174 * Setup monitoring to check battery state
1175 * when charger cable is attached.
1176 */
1177 if (cable->attached && is_polling_required(cable->cm)) {
Tejun Heo2fbb5202012-12-21 17:56:51 -08001178 cancel_work_sync(&setup_polling);
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +09001179 schedule_work(&setup_polling);
1180 }
1181
1182 /*
1183 * Setup work for controlling charger(regulator)
1184 * according to charger cable.
1185 */
Chanwoo Choibee737b2012-07-12 15:03:25 +09001186 schedule_work(&cable->wq);
1187
1188 return NOTIFY_DONE;
1189}
1190
1191/**
1192 * charger_extcon_init - register external connector to use it
1193 * as the charger cable
1194 *
1195 * @cm: the Charger Manager representing the battery.
1196 * @cable: the Charger cable representing the external connector.
1197 */
1198static int charger_extcon_init(struct charger_manager *cm,
1199 struct charger_cable *cable)
1200{
1201 int ret = 0;
1202
1203 /*
1204 * Charger manager use Extcon framework to identify
1205 * the charger cable among various external connector
1206 * cable (e.g., TA, USB, MHL, Dock).
1207 */
1208 INIT_WORK(&cable->wq, charger_extcon_work);
1209 cable->nb.notifier_call = charger_extcon_notifier;
1210 ret = extcon_register_interest(&cable->extcon_dev,
1211 cable->extcon_name, cable->name, &cable->nb);
1212 if (ret < 0) {
Joe Perchese5409cb2013-06-06 18:25:12 -07001213 pr_info("Cannot register extcon_dev for %s(cable: %s)\n",
1214 cable->extcon_name, cable->name);
Chanwoo Choibee737b2012-07-12 15:03:25 +09001215 ret = -EINVAL;
1216 }
1217
1218 return ret;
1219}
1220
Chanwoo Choi41468a12012-11-22 16:54:26 +09001221/**
1222 * charger_manager_register_extcon - Register extcon device to recevie state
1223 * of charger cable.
1224 * @cm: the Charger Manager representing the battery.
1225 *
1226 * This function support EXTCON(External Connector) subsystem to detect the
1227 * state of charger cables for enabling or disabling charger(regulator) and
1228 * select the charger cable for charging among a number of external cable
1229 * according to policy of H/W board.
1230 */
1231static int charger_manager_register_extcon(struct charger_manager *cm)
1232{
1233 struct charger_desc *desc = cm->desc;
1234 struct charger_regulator *charger;
1235 int ret = 0;
1236 int i;
1237 int j;
1238
1239 for (i = 0; i < desc->num_charger_regulators; i++) {
1240 charger = &desc->charger_regulators[i];
1241
1242 charger->consumer = regulator_get(cm->dev,
1243 charger->regulator_name);
Jonghwa Lee5a6c2202013-06-25 14:18:14 +09001244 if (IS_ERR(charger->consumer)) {
Joe Perchese5409cb2013-06-06 18:25:12 -07001245 dev_err(cm->dev, "Cannot find charger(%s)\n",
1246 charger->regulator_name);
Jonghwa Lee5a6c2202013-06-25 14:18:14 +09001247 return PTR_ERR(charger->consumer);
Chanwoo Choi41468a12012-11-22 16:54:26 +09001248 }
1249 charger->cm = cm;
1250
1251 for (j = 0; j < charger->num_cables; j++) {
1252 struct charger_cable *cable = &charger->cables[j];
1253
1254 ret = charger_extcon_init(cm, cable);
1255 if (ret < 0) {
Joe Perchese5409cb2013-06-06 18:25:12 -07001256 dev_err(cm->dev, "Cannot initialize charger(%s)\n",
1257 charger->regulator_name);
Chanwoo Choi41468a12012-11-22 16:54:26 +09001258 goto err;
1259 }
1260 cable->charger = charger;
1261 cable->cm = cm;
1262 }
1263 }
1264
1265err:
1266 return ret;
1267}
1268
Chanwoo Choi3950c782012-09-21 18:49:37 +09001269/* help function of sysfs node to control charger(regulator) */
1270static ssize_t charger_name_show(struct device *dev,
1271 struct device_attribute *attr, char *buf)
1272{
1273 struct charger_regulator *charger
1274 = container_of(attr, struct charger_regulator, attr_name);
1275
1276 return sprintf(buf, "%s\n", charger->regulator_name);
1277}
1278
1279static ssize_t charger_state_show(struct device *dev,
1280 struct device_attribute *attr, char *buf)
1281{
1282 struct charger_regulator *charger
1283 = container_of(attr, struct charger_regulator, attr_state);
1284 int state = 0;
1285
1286 if (!charger->externally_control)
1287 state = regulator_is_enabled(charger->consumer);
1288
1289 return sprintf(buf, "%s\n", state ? "enabled" : "disabled");
1290}
1291
1292static ssize_t charger_externally_control_show(struct device *dev,
1293 struct device_attribute *attr, char *buf)
1294{
1295 struct charger_regulator *charger = container_of(attr,
1296 struct charger_regulator, attr_externally_control);
1297
1298 return sprintf(buf, "%d\n", charger->externally_control);
1299}
1300
1301static ssize_t charger_externally_control_store(struct device *dev,
1302 struct device_attribute *attr, const char *buf,
1303 size_t count)
1304{
1305 struct charger_regulator *charger
1306 = container_of(attr, struct charger_regulator,
1307 attr_externally_control);
1308 struct charger_manager *cm = charger->cm;
1309 struct charger_desc *desc = cm->desc;
1310 int i;
1311 int ret;
1312 int externally_control;
1313 int chargers_externally_control = 1;
1314
1315 ret = sscanf(buf, "%d", &externally_control);
1316 if (ret == 0) {
1317 ret = -EINVAL;
1318 return ret;
1319 }
1320
1321 if (!externally_control) {
1322 charger->externally_control = 0;
1323 return count;
1324 }
1325
1326 for (i = 0; i < desc->num_charger_regulators; i++) {
1327 if (&desc->charger_regulators[i] != charger &&
Chanwoo Choi41468a12012-11-22 16:54:26 +09001328 !desc->charger_regulators[i].externally_control) {
Chanwoo Choi3950c782012-09-21 18:49:37 +09001329 /*
1330 * At least, one charger is controlled by
1331 * charger-manager
1332 */
1333 chargers_externally_control = 0;
1334 break;
1335 }
1336 }
1337
1338 if (!chargers_externally_control) {
1339 if (cm->charger_enabled) {
1340 try_charger_enable(charger->cm, false);
1341 charger->externally_control = externally_control;
1342 try_charger_enable(charger->cm, true);
1343 } else {
1344 charger->externally_control = externally_control;
1345 }
1346 } else {
1347 dev_warn(cm->dev,
Joe Perchese5409cb2013-06-06 18:25:12 -07001348 "'%s' regulator should be controlled in charger-manager because charger-manager must need at least one charger for charging\n",
1349 charger->regulator_name);
Chanwoo Choi3950c782012-09-21 18:49:37 +09001350 }
1351
1352 return count;
1353}
1354
Chanwoo Choi41468a12012-11-22 16:54:26 +09001355/**
1356 * charger_manager_register_sysfs - Register sysfs entry for each charger
1357 * @cm: the Charger Manager representing the battery.
1358 *
1359 * This function add sysfs entry for charger(regulator) to control charger from
1360 * user-space. If some development board use one more chargers for charging
1361 * but only need one charger on specific case which is dependent on user
1362 * scenario or hardware restrictions, the user enter 1 or 0(zero) to '/sys/
1363 * class/power_supply/battery/charger.[index]/externally_control'. For example,
1364 * if user enter 1 to 'sys/class/power_supply/battery/charger.[index]/
1365 * externally_control, this charger isn't controlled from charger-manager and
1366 * always stay off state of regulator.
1367 */
1368static int charger_manager_register_sysfs(struct charger_manager *cm)
1369{
1370 struct charger_desc *desc = cm->desc;
1371 struct charger_regulator *charger;
1372 int chargers_externally_control = 1;
1373 char buf[11];
1374 char *str;
1375 int ret = 0;
1376 int i;
1377
1378 /* Create sysfs entry to control charger(regulator) */
1379 for (i = 0; i < desc->num_charger_regulators; i++) {
1380 charger = &desc->charger_regulators[i];
1381
1382 snprintf(buf, 10, "charger.%d", i);
Jonghwa Lee883c10a2013-10-25 11:47:31 +09001383 str = devm_kzalloc(cm->dev,
1384 sizeof(char) * (strlen(buf) + 1), GFP_KERNEL);
Chanwoo Choi41468a12012-11-22 16:54:26 +09001385 if (!str) {
Chanwoo Choi41468a12012-11-22 16:54:26 +09001386 ret = -ENOMEM;
1387 goto err;
1388 }
1389 strcpy(str, buf);
1390
1391 charger->attrs[0] = &charger->attr_name.attr;
1392 charger->attrs[1] = &charger->attr_state.attr;
1393 charger->attrs[2] = &charger->attr_externally_control.attr;
1394 charger->attrs[3] = NULL;
1395 charger->attr_g.name = str;
1396 charger->attr_g.attrs = charger->attrs;
1397
1398 sysfs_attr_init(&charger->attr_name.attr);
1399 charger->attr_name.attr.name = "name";
1400 charger->attr_name.attr.mode = 0444;
1401 charger->attr_name.show = charger_name_show;
1402
1403 sysfs_attr_init(&charger->attr_state.attr);
1404 charger->attr_state.attr.name = "state";
1405 charger->attr_state.attr.mode = 0444;
1406 charger->attr_state.show = charger_state_show;
1407
1408 sysfs_attr_init(&charger->attr_externally_control.attr);
1409 charger->attr_externally_control.attr.name
1410 = "externally_control";
1411 charger->attr_externally_control.attr.mode = 0644;
1412 charger->attr_externally_control.show
1413 = charger_externally_control_show;
1414 charger->attr_externally_control.store
1415 = charger_externally_control_store;
1416
1417 if (!desc->charger_regulators[i].externally_control ||
1418 !chargers_externally_control)
1419 chargers_externally_control = 0;
1420
Joe Perchese5409cb2013-06-06 18:25:12 -07001421 dev_info(cm->dev, "'%s' regulator's externally_control is %d\n",
1422 charger->regulator_name, charger->externally_control);
Chanwoo Choi41468a12012-11-22 16:54:26 +09001423
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001424 ret = sysfs_create_group(&cm->charger_psy->dev.kobj,
Chanwoo Choi41468a12012-11-22 16:54:26 +09001425 &charger->attr_g);
1426 if (ret < 0) {
Joe Perchese5409cb2013-06-06 18:25:12 -07001427 dev_err(cm->dev, "Cannot create sysfs entry of %s regulator\n",
1428 charger->regulator_name);
Chanwoo Choi41468a12012-11-22 16:54:26 +09001429 ret = -EINVAL;
1430 goto err;
1431 }
1432 }
1433
1434 if (chargers_externally_control) {
Joe Perchese5409cb2013-06-06 18:25:12 -07001435 dev_err(cm->dev, "Cannot register regulator because charger-manager must need at least one charger for charging battery\n");
Chanwoo Choi41468a12012-11-22 16:54:26 +09001436 ret = -EINVAL;
1437 goto err;
1438 }
1439
1440err:
1441 return ret;
1442}
1443
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +02001444static int cm_init_thermal_data(struct charger_manager *cm,
1445 struct power_supply *fuel_gauge)
Jonghwa Lee5c49a622013-12-18 15:42:34 +09001446{
1447 struct charger_desc *desc = cm->desc;
1448 union power_supply_propval val;
1449 int ret;
1450
1451 /* Verify whether fuel gauge provides battery temperature */
Krzysztof Kozlowskib70229b2015-03-12 08:44:10 +01001452 ret = power_supply_get_property(fuel_gauge,
Jonghwa Lee5c49a622013-12-18 15:42:34 +09001453 POWER_SUPPLY_PROP_TEMP, &val);
1454
1455 if (!ret) {
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001456 cm->charger_psy_desc.properties[cm->charger_psy_desc.num_properties] =
Jonghwa Lee5c49a622013-12-18 15:42:34 +09001457 POWER_SUPPLY_PROP_TEMP;
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001458 cm->charger_psy_desc.num_properties++;
Jonghwa Lee5c49a622013-12-18 15:42:34 +09001459 cm->desc->measure_battery_temp = true;
1460 }
1461#ifdef CONFIG_THERMAL
Jonghwa Lee5c49a622013-12-18 15:42:34 +09001462 if (ret && desc->thermal_zone) {
1463 cm->tzd_batt =
1464 thermal_zone_get_zone_by_name(desc->thermal_zone);
1465 if (IS_ERR(cm->tzd_batt))
1466 return PTR_ERR(cm->tzd_batt);
1467
1468 /* Use external thermometer */
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001469 cm->charger_psy_desc.properties[cm->charger_psy_desc.num_properties] =
Jonghwa Lee5c49a622013-12-18 15:42:34 +09001470 POWER_SUPPLY_PROP_TEMP_AMBIENT;
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001471 cm->charger_psy_desc.num_properties++;
Jonghwa Lee5c49a622013-12-18 15:42:34 +09001472 cm->desc->measure_battery_temp = true;
1473 ret = 0;
1474 }
1475#endif
1476 if (cm->desc->measure_battery_temp) {
1477 /* NOTICE : Default allowable minimum charge temperature is 0 */
1478 if (!desc->temp_max)
1479 desc->temp_max = CM_DEFAULT_CHARGE_TEMP_MAX;
1480 if (!desc->temp_diff)
1481 desc->temp_diff = CM_DEFAULT_RECHARGE_TEMP_DIFF;
1482 }
1483
1484 return ret;
1485}
1486
Fabian Frederick8fb08852015-03-16 20:17:12 +01001487static const struct of_device_id charger_manager_match[] = {
Jonghwa Lee856ee612013-12-18 15:42:35 +09001488 {
1489 .compatible = "charger-manager",
1490 },
1491 {},
1492};
1493
Anton Vorontsov434a09f2013-12-23 18:17:05 -08001494static struct charger_desc *of_cm_parse_desc(struct device *dev)
Jonghwa Lee856ee612013-12-18 15:42:35 +09001495{
1496 struct charger_desc *desc;
1497 struct device_node *np = dev->of_node;
1498 u32 poll_mode = CM_POLL_DISABLE;
1499 u32 battery_stat = CM_NO_BATTERY;
1500 int num_chgs = 0;
1501
1502 desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
1503 if (!desc)
1504 return ERR_PTR(-ENOMEM);
1505
1506 of_property_read_string(np, "cm-name", &desc->psy_name);
1507
1508 of_property_read_u32(np, "cm-poll-mode", &poll_mode);
1509 desc->polling_mode = poll_mode;
1510
1511 of_property_read_u32(np, "cm-poll-interval",
1512 &desc->polling_interval_ms);
1513
1514 of_property_read_u32(np, "cm-fullbatt-vchkdrop-ms",
1515 &desc->fullbatt_vchkdrop_ms);
1516 of_property_read_u32(np, "cm-fullbatt-vchkdrop-volt",
1517 &desc->fullbatt_vchkdrop_uV);
1518 of_property_read_u32(np, "cm-fullbatt-voltage", &desc->fullbatt_uV);
1519 of_property_read_u32(np, "cm-fullbatt-soc", &desc->fullbatt_soc);
1520 of_property_read_u32(np, "cm-fullbatt-capacity",
1521 &desc->fullbatt_full_capacity);
1522
1523 of_property_read_u32(np, "cm-battery-stat", &battery_stat);
1524 desc->battery_present = battery_stat;
1525
1526 /* chargers */
1527 of_property_read_u32(np, "cm-num-chargers", &num_chgs);
1528 if (num_chgs) {
1529 /* Allocate empty bin at the tail of array */
1530 desc->psy_charger_stat = devm_kzalloc(dev, sizeof(char *)
1531 * (num_chgs + 1), GFP_KERNEL);
1532 if (desc->psy_charger_stat) {
1533 int i;
1534 for (i = 0; i < num_chgs; i++)
1535 of_property_read_string_index(np, "cm-chargers",
1536 i, &desc->psy_charger_stat[i]);
1537 } else {
1538 return ERR_PTR(-ENOMEM);
1539 }
1540 }
1541
1542 of_property_read_string(np, "cm-fuel-gauge", &desc->psy_fuel_gauge);
1543
1544 of_property_read_string(np, "cm-thermal-zone", &desc->thermal_zone);
1545
1546 of_property_read_u32(np, "cm-battery-cold", &desc->temp_min);
1547 if (of_get_property(np, "cm-battery-cold-in-minus", NULL))
1548 desc->temp_min *= -1;
1549 of_property_read_u32(np, "cm-battery-hot", &desc->temp_max);
1550 of_property_read_u32(np, "cm-battery-temp-diff", &desc->temp_diff);
1551
1552 of_property_read_u32(np, "cm-charging-max",
1553 &desc->charging_max_duration_ms);
1554 of_property_read_u32(np, "cm-discharging-max",
1555 &desc->discharging_max_duration_ms);
1556
1557 /* battery charger regualtors */
1558 desc->num_charger_regulators = of_get_child_count(np);
1559 if (desc->num_charger_regulators) {
1560 struct charger_regulator *chg_regs;
1561 struct device_node *child;
1562
1563 chg_regs = devm_kzalloc(dev, sizeof(*chg_regs)
1564 * desc->num_charger_regulators,
1565 GFP_KERNEL);
1566 if (!chg_regs)
1567 return ERR_PTR(-ENOMEM);
1568
1569 desc->charger_regulators = chg_regs;
1570
1571 for_each_child_of_node(np, child) {
1572 struct charger_cable *cables;
1573 struct device_node *_child;
1574
1575 of_property_read_string(child, "cm-regulator-name",
1576 &chg_regs->regulator_name);
1577
1578 /* charger cables */
1579 chg_regs->num_cables = of_get_child_count(child);
1580 if (chg_regs->num_cables) {
1581 cables = devm_kzalloc(dev, sizeof(*cables)
1582 * chg_regs->num_cables,
1583 GFP_KERNEL);
Julia Lawall8e5cfb72015-10-10 14:30:51 +02001584 if (!cables) {
1585 of_node_put(child);
Jonghwa Lee856ee612013-12-18 15:42:35 +09001586 return ERR_PTR(-ENOMEM);
Julia Lawall8e5cfb72015-10-10 14:30:51 +02001587 }
Jonghwa Lee856ee612013-12-18 15:42:35 +09001588
1589 chg_regs->cables = cables;
1590
1591 for_each_child_of_node(child, _child) {
1592 of_property_read_string(_child,
1593 "cm-cable-name", &cables->name);
1594 of_property_read_string(_child,
1595 "cm-cable-extcon",
1596 &cables->extcon_name);
1597 of_property_read_u32(_child,
1598 "cm-cable-min",
1599 &cables->min_uA);
1600 of_property_read_u32(_child,
1601 "cm-cable-max",
1602 &cables->max_uA);
1603 cables++;
1604 }
1605 }
1606 chg_regs++;
1607 }
1608 }
1609 return desc;
1610}
1611
1612static inline struct charger_desc *cm_get_drv_data(struct platform_device *pdev)
1613{
1614 if (pdev->dev.of_node)
1615 return of_cm_parse_desc(&pdev->dev);
Jingoo Han86515b72014-08-29 12:45:27 +09001616 return dev_get_platdata(&pdev->dev);
Jonghwa Lee856ee612013-12-18 15:42:35 +09001617}
1618
Jonghwa Leec1155c62014-12-19 17:55:13 +09001619static enum alarmtimer_restart cm_timer_func(struct alarm *alarm, ktime_t now)
1620{
1621 cm_timer_set = false;
1622 return ALARMTIMER_NORESTART;
1623}
1624
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001625static int charger_manager_probe(struct platform_device *pdev)
1626{
Jonghwa Lee856ee612013-12-18 15:42:35 +09001627 struct charger_desc *desc = cm_get_drv_data(pdev);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001628 struct charger_manager *cm;
1629 int ret = 0, i = 0;
Chanwoo Choibee737b2012-07-12 15:03:25 +09001630 int j = 0;
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001631 union power_supply_propval val;
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +02001632 struct power_supply *fuel_gauge;
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001633 struct power_supply_config psy_cfg = {};
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001634
Chanwoo Choic6738d02014-08-26 13:41:38 +09001635 if (IS_ERR(desc)) {
Joe Perchese5409cb2013-06-06 18:25:12 -07001636 dev_err(&pdev->dev, "No platform data (desc) found\n");
Jonghwa Lee883c10a2013-10-25 11:47:31 +09001637 return -ENODEV;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001638 }
1639
Jonghwa Lee883c10a2013-10-25 11:47:31 +09001640 cm = devm_kzalloc(&pdev->dev,
1641 sizeof(struct charger_manager), GFP_KERNEL);
1642 if (!cm)
1643 return -ENOMEM;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001644
1645 /* Basic Values. Unspecified are Null or 0 */
1646 cm->dev = &pdev->dev;
Jonghwa Lee883c10a2013-10-25 11:47:31 +09001647 cm->desc = desc;
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001648 psy_cfg.drv_data = cm;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001649
Jonghwa Leec1155c62014-12-19 17:55:13 +09001650 /* Initialize alarm timer */
1651 if (alarmtimer_get_rtcdev()) {
1652 cm_timer = devm_kzalloc(cm->dev, sizeof(*cm_timer), GFP_KERNEL);
1653 alarm_init(cm_timer, ALARM_BOOTTIME, cm_timer_func);
1654 }
1655
Chanwoo Choid829dc72012-05-05 06:24:10 -07001656 /*
1657 * The following two do not need to be errors.
1658 * Users may intentionally ignore those two features.
1659 */
1660 if (desc->fullbatt_uV == 0) {
Joe Perchese5409cb2013-06-06 18:25:12 -07001661 dev_info(&pdev->dev, "Ignoring full-battery voltage threshold as it is not supplied\n");
Chanwoo Choid829dc72012-05-05 06:24:10 -07001662 }
1663 if (!desc->fullbatt_vchkdrop_ms || !desc->fullbatt_vchkdrop_uV) {
Joe Perchese5409cb2013-06-06 18:25:12 -07001664 dev_info(&pdev->dev, "Disabling full-battery voltage drop checking mechanism as it is not supplied\n");
Chanwoo Choid829dc72012-05-05 06:24:10 -07001665 desc->fullbatt_vchkdrop_ms = 0;
1666 desc->fullbatt_vchkdrop_uV = 0;
1667 }
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +09001668 if (desc->fullbatt_soc == 0) {
Joe Perchese5409cb2013-06-06 18:25:12 -07001669 dev_info(&pdev->dev, "Ignoring full-battery soc(state of charge) threshold as it is not supplied\n");
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +09001670 }
1671 if (desc->fullbatt_full_capacity == 0) {
Joe Perchese5409cb2013-06-06 18:25:12 -07001672 dev_info(&pdev->dev, "Ignoring full-battery full capacity threshold as it is not supplied\n");
Chanwoo Choi2ed9e9b2012-08-21 17:06:52 +09001673 }
Chanwoo Choid829dc72012-05-05 06:24:10 -07001674
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001675 if (!desc->charger_regulators || desc->num_charger_regulators < 1) {
Joe Perchese5409cb2013-06-06 18:25:12 -07001676 dev_err(&pdev->dev, "charger_regulators undefined\n");
Jonghwa Lee883c10a2013-10-25 11:47:31 +09001677 return -EINVAL;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001678 }
1679
1680 if (!desc->psy_charger_stat || !desc->psy_charger_stat[0]) {
Joe Perchese5409cb2013-06-06 18:25:12 -07001681 dev_err(&pdev->dev, "No power supply defined\n");
Jonghwa Lee883c10a2013-10-25 11:47:31 +09001682 return -EINVAL;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001683 }
1684
Krzysztof Kozlowski661a8882014-09-26 13:27:03 +02001685 if (!desc->psy_fuel_gauge) {
1686 dev_err(&pdev->dev, "No fuel gauge power supply defined\n");
1687 return -EINVAL;
1688 }
1689
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001690 /* Counting index only */
1691 while (desc->psy_charger_stat[i])
1692 i++;
1693
Krzysztof Kozlowskicdaf3e12014-10-13 15:34:31 +02001694 /* Check if charger's supplies are present at probe */
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001695 for (i = 0; desc->psy_charger_stat[i]; i++) {
Krzysztof Kozlowskicdaf3e12014-10-13 15:34:31 +02001696 struct power_supply *psy;
1697
1698 psy = power_supply_get_by_name(desc->psy_charger_stat[i]);
1699 if (!psy) {
Joe Perchese5409cb2013-06-06 18:25:12 -07001700 dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n",
1701 desc->psy_charger_stat[i]);
Jonghwa Lee883c10a2013-10-25 11:47:31 +09001702 return -ENODEV;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001703 }
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +01001704 power_supply_put(psy);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001705 }
1706
1707 if (desc->polling_interval_ms == 0 ||
1708 msecs_to_jiffies(desc->polling_interval_ms) <= CM_JIFFIES_SMALL) {
1709 dev_err(&pdev->dev, "polling_interval_ms is too small\n");
Jonghwa Lee883c10a2013-10-25 11:47:31 +09001710 return -EINVAL;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001711 }
1712
Chanwoo Choi8fcfe082012-09-20 21:20:05 -07001713 if (!desc->charging_max_duration_ms ||
1714 !desc->discharging_max_duration_ms) {
Joe Perchese5409cb2013-06-06 18:25:12 -07001715 dev_info(&pdev->dev, "Cannot limit charging duration checking mechanism to prevent overcharge/overheat and control discharging duration\n");
Chanwoo Choi8fcfe082012-09-20 21:20:05 -07001716 desc->charging_max_duration_ms = 0;
1717 desc->discharging_max_duration_ms = 0;
1718 }
1719
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001720 platform_set_drvdata(pdev, cm);
1721
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001722 memcpy(&cm->charger_psy_desc, &psy_default, sizeof(psy_default));
Axel Linbb2a95c2012-01-12 12:56:35 +08001723
Chanwoo Choi41468a12012-11-22 16:54:26 +09001724 if (!desc->psy_name)
Axel Linbb2a95c2012-01-12 12:56:35 +08001725 strncpy(cm->psy_name_buf, psy_default.name, PSY_NAME_MAX);
Chanwoo Choi41468a12012-11-22 16:54:26 +09001726 else
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001727 strncpy(cm->psy_name_buf, desc->psy_name, PSY_NAME_MAX);
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001728 cm->charger_psy_desc.name = cm->psy_name_buf;
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001729
1730 /* Allocate for psy properties because they may vary */
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001731 cm->charger_psy_desc.properties = devm_kzalloc(&pdev->dev,
Jonghwa Lee883c10a2013-10-25 11:47:31 +09001732 sizeof(enum power_supply_property)
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001733 * (ARRAY_SIZE(default_charger_props) +
Jonghwa Lee883c10a2013-10-25 11:47:31 +09001734 NUM_CHARGER_PSY_OPTIONAL), GFP_KERNEL);
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001735 if (!cm->charger_psy_desc.properties)
Jonghwa Lee883c10a2013-10-25 11:47:31 +09001736 return -ENOMEM;
1737
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001738 memcpy(cm->charger_psy_desc.properties, default_charger_props,
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001739 sizeof(enum power_supply_property) *
1740 ARRAY_SIZE(default_charger_props));
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001741 cm->charger_psy_desc.num_properties = psy_default.num_properties;
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001742
1743 /* Find which optional psy-properties are available */
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +01001744 fuel_gauge = power_supply_get_by_name(desc->psy_fuel_gauge);
1745 if (!fuel_gauge) {
1746 dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n",
1747 desc->psy_fuel_gauge);
1748 return -ENODEV;
1749 }
Krzysztof Kozlowskib70229b2015-03-12 08:44:10 +01001750 if (!power_supply_get_property(fuel_gauge,
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001751 POWER_SUPPLY_PROP_CHARGE_NOW, &val)) {
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001752 cm->charger_psy_desc.properties[cm->charger_psy_desc.num_properties] =
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001753 POWER_SUPPLY_PROP_CHARGE_NOW;
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001754 cm->charger_psy_desc.num_properties++;
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001755 }
Krzysztof Kozlowskib70229b2015-03-12 08:44:10 +01001756 if (!power_supply_get_property(fuel_gauge,
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001757 POWER_SUPPLY_PROP_CURRENT_NOW,
1758 &val)) {
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001759 cm->charger_psy_desc.properties[cm->charger_psy_desc.num_properties] =
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001760 POWER_SUPPLY_PROP_CURRENT_NOW;
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001761 cm->charger_psy_desc.num_properties++;
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001762 }
Axel Linbb2a95c2012-01-12 12:56:35 +08001763
Krzysztof Kozlowskibdbe8142014-10-13 15:34:30 +02001764 ret = cm_init_thermal_data(cm, fuel_gauge);
Jonghwa Lee5c49a622013-12-18 15:42:34 +09001765 if (ret) {
1766 dev_err(&pdev->dev, "Failed to initialize thermal data\n");
1767 cm->desc->measure_battery_temp = false;
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001768 }
Krzysztof Kozlowskib43eb352015-03-12 08:44:14 +01001769 power_supply_put(fuel_gauge);
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001770
Chanwoo Choid829dc72012-05-05 06:24:10 -07001771 INIT_DELAYED_WORK(&cm->fullbatt_vchk_work, fullbatt_vchk);
1772
Krzysztof Kozlowski4970d832015-05-19 16:16:30 +09001773 cm->charger_psy = power_supply_register(&pdev->dev,
1774 &cm->charger_psy_desc,
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001775 &psy_cfg);
1776 if (IS_ERR(cm->charger_psy)) {
Joe Perchese5409cb2013-06-06 18:25:12 -07001777 dev_err(&pdev->dev, "Cannot register charger-manager with name \"%s\"\n",
Krzysztof Kozlowskiecf896b2015-03-24 08:58:43 +01001778 cm->charger_psy_desc.name);
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001779 return PTR_ERR(cm->charger_psy);
Donggeun Kimad3d13ee2011-12-27 18:47:49 +09001780 }
1781
Chanwoo Choi41468a12012-11-22 16:54:26 +09001782 /* Register extcon device for charger cable */
1783 ret = charger_manager_register_extcon(cm);
1784 if (ret < 0) {
1785 dev_err(&pdev->dev, "Cannot initialize extcon device\n");
1786 goto err_reg_extcon;
Chanwoo Choi3950c782012-09-21 18:49:37 +09001787 }
1788
Chanwoo Choi41468a12012-11-22 16:54:26 +09001789 /* Register sysfs entry for charger(regulator) */
1790 ret = charger_manager_register_sysfs(cm);
1791 if (ret < 0) {
1792 dev_err(&pdev->dev,
1793 "Cannot initialize sysfs entry of regulator\n");
1794 goto err_reg_sysfs;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001795 }
1796
1797 /* Add to the list */
1798 mutex_lock(&cm_list_mtx);
1799 list_add(&cm->entry, &cm_list);
1800 mutex_unlock(&cm_list_mtx);
1801
Chanwoo Choidfeccb12012-05-05 06:26:47 -07001802 /*
1803 * Charger-manager is capable of waking up the systme from sleep
1804 * when event is happend through cm_notify_event()
1805 */
1806 device_init_wakeup(&pdev->dev, true);
1807 device_set_wakeup_capable(&pdev->dev, false);
1808
Chanwoo Choib1022e22014-08-26 13:41:39 +09001809 /*
1810 * Charger-manager have to check the charging state right after
1811 * tialization of charger-manager and then update current charging
1812 * state.
1813 */
1814 cm_monitor();
1815
Chanwoo Choid829dc72012-05-05 06:24:10 -07001816 schedule_work(&setup_polling);
1817
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001818 return 0;
1819
Chanwoo Choi41468a12012-11-22 16:54:26 +09001820err_reg_sysfs:
Chanwoo Choi3950c782012-09-21 18:49:37 +09001821 for (i = 0; i < desc->num_charger_regulators; i++) {
1822 struct charger_regulator *charger;
1823
1824 charger = &desc->charger_regulators[i];
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001825 sysfs_remove_group(&cm->charger_psy->dev.kobj,
Chanwoo Choi3950c782012-09-21 18:49:37 +09001826 &charger->attr_g);
Chanwoo Choi3950c782012-09-21 18:49:37 +09001827 }
Chanwoo Choi41468a12012-11-22 16:54:26 +09001828err_reg_extcon:
1829 for (i = 0; i < desc->num_charger_regulators; i++) {
1830 struct charger_regulator *charger;
1831
1832 charger = &desc->charger_regulators[i];
1833 for (j = 0; j < charger->num_cables; j++) {
Chanwoo Choibee737b2012-07-12 15:03:25 +09001834 struct charger_cable *cable = &charger->cables[j];
Jonghwa Lee3cc9d2692013-06-25 14:02:49 +09001835 /* Remove notifier block if only edev exists */
1836 if (cable->extcon_dev.edev)
1837 extcon_unregister_interest(&cable->extcon_dev);
Chanwoo Choibee737b2012-07-12 15:03:25 +09001838 }
Chanwoo Choi41468a12012-11-22 16:54:26 +09001839
Chanwoo Choibee737b2012-07-12 15:03:25 +09001840 regulator_put(desc->charger_regulators[i].consumer);
Chanwoo Choi41468a12012-11-22 16:54:26 +09001841 }
Chanwoo Choibee737b2012-07-12 15:03:25 +09001842
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001843 power_supply_unregister(cm->charger_psy);
Jonghwa Lee883c10a2013-10-25 11:47:31 +09001844
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001845 return ret;
1846}
1847
Bill Pemberton415ec692012-11-19 13:26:07 -05001848static int charger_manager_remove(struct platform_device *pdev)
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001849{
1850 struct charger_manager *cm = platform_get_drvdata(pdev);
1851 struct charger_desc *desc = cm->desc;
Chanwoo Choibee737b2012-07-12 15:03:25 +09001852 int i = 0;
1853 int j = 0;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001854
1855 /* Remove from the list */
1856 mutex_lock(&cm_list_mtx);
1857 list_del(&cm->entry);
1858 mutex_unlock(&cm_list_mtx);
1859
Tejun Heo2fbb5202012-12-21 17:56:51 -08001860 cancel_work_sync(&setup_polling);
1861 cancel_delayed_work_sync(&cm_monitor_work);
Chanwoo Choid829dc72012-05-05 06:24:10 -07001862
Chanwoo Choibee737b2012-07-12 15:03:25 +09001863 for (i = 0 ; i < desc->num_charger_regulators ; i++) {
1864 struct charger_regulator *charger
1865 = &desc->charger_regulators[i];
1866 for (j = 0 ; j < charger->num_cables ; j++) {
1867 struct charger_cable *cable = &charger->cables[j];
1868 extcon_unregister_interest(&cable->extcon_dev);
1869 }
1870 }
1871
1872 for (i = 0 ; i < desc->num_charger_regulators ; i++)
1873 regulator_put(desc->charger_regulators[i].consumer);
1874
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +01001875 power_supply_unregister(cm->charger_psy);
Chanwoo Choid829dc72012-05-05 06:24:10 -07001876
1877 try_charger_enable(cm, false);
1878
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001879 return 0;
1880}
1881
Axel Lin1bbe24d2012-01-11 17:19:45 +08001882static const struct platform_device_id charger_manager_id[] = {
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001883 { "charger-manager", 0 },
1884 { },
1885};
Axel Lin1bbe24d2012-01-11 17:19:45 +08001886MODULE_DEVICE_TABLE(platform, charger_manager_id);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001887
Chanwoo Choidfeccb12012-05-05 06:26:47 -07001888static int cm_suspend_noirq(struct device *dev)
1889{
1890 int ret = 0;
1891
1892 if (device_may_wakeup(dev)) {
1893 device_set_wakeup_capable(dev, false);
1894 ret = -EAGAIN;
1895 }
1896
1897 return ret;
1898}
1899
Jonghwa Leec1155c62014-12-19 17:55:13 +09001900static bool cm_need_to_awake(void)
1901{
1902 struct charger_manager *cm;
1903
1904 if (cm_timer)
1905 return false;
1906
1907 mutex_lock(&cm_list_mtx);
1908 list_for_each_entry(cm, &cm_list, entry) {
1909 if (is_charging(cm)) {
1910 mutex_unlock(&cm_list_mtx);
1911 return true;
1912 }
1913 }
1914 mutex_unlock(&cm_list_mtx);
1915
1916 return false;
1917}
1918
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001919static int cm_suspend_prepare(struct device *dev)
1920{
Axel Linbb2a95c2012-01-12 12:56:35 +08001921 struct charger_manager *cm = dev_get_drvdata(dev);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001922
Jonghwa Leec1155c62014-12-19 17:55:13 +09001923 if (cm_need_to_awake())
1924 return -EBUSY;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001925
Jonghwa Leec1155c62014-12-19 17:55:13 +09001926 if (!cm_suspended)
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001927 cm_suspended = true;
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001928
Jonghwa Leec1155c62014-12-19 17:55:13 +09001929 cm_timer_set = cm_setup_timer();
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001930
Jonghwa Leec1155c62014-12-19 17:55:13 +09001931 if (cm_timer_set) {
1932 cancel_work_sync(&setup_polling);
1933 cancel_delayed_work_sync(&cm_monitor_work);
1934 cancel_delayed_work(&cm->fullbatt_vchk_work);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001935 }
1936
1937 return 0;
1938}
1939
1940static void cm_suspend_complete(struct device *dev)
1941{
Axel Linbb2a95c2012-01-12 12:56:35 +08001942 struct charger_manager *cm = dev_get_drvdata(dev);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001943
Jonghwa Leec1155c62014-12-19 17:55:13 +09001944 if (cm_suspended)
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001945 cm_suspended = false;
Jonghwa Leec1155c62014-12-19 17:55:13 +09001946
1947 if (cm_timer_set) {
1948 ktime_t remain;
1949
1950 alarm_cancel(cm_timer);
1951 cm_timer_set = false;
1952 remain = alarm_expires_remaining(cm_timer);
1953 cm_suspend_duration_ms -= ktime_to_ms(remain);
1954 schedule_work(&setup_polling);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001955 }
1956
Jonghwa Leec1155c62014-12-19 17:55:13 +09001957 _cm_monitor(cm);
1958
Chanwoo Choid829dc72012-05-05 06:24:10 -07001959 /* Re-enqueue delayed work (fullbatt_vchk_work) */
1960 if (cm->fullbatt_vchk_jiffies_at) {
1961 unsigned long delay = 0;
1962 unsigned long now = jiffies + CM_JIFFIES_SMALL;
1963
1964 if (time_after_eq(now, cm->fullbatt_vchk_jiffies_at)) {
1965 delay = (unsigned long)((long)now
1966 - (long)(cm->fullbatt_vchk_jiffies_at));
1967 delay = jiffies_to_msecs(delay);
1968 } else {
1969 delay = 0;
1970 }
1971
1972 /*
Jonghwa Leec1155c62014-12-19 17:55:13 +09001973 * Account for cm_suspend_duration_ms with assuming that
1974 * timer stops in suspend.
Chanwoo Choid829dc72012-05-05 06:24:10 -07001975 */
Jonghwa Leec1155c62014-12-19 17:55:13 +09001976 if (delay > cm_suspend_duration_ms)
1977 delay -= cm_suspend_duration_ms;
1978 else
1979 delay = 0;
Chanwoo Choid829dc72012-05-05 06:24:10 -07001980
1981 queue_delayed_work(cm_wq, &cm->fullbatt_vchk_work,
1982 msecs_to_jiffies(delay));
1983 }
Chanwoo Choidfeccb12012-05-05 06:26:47 -07001984 device_set_wakeup_capable(cm->dev, false);
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001985}
1986
1987static const struct dev_pm_ops charger_manager_pm = {
1988 .prepare = cm_suspend_prepare,
Chanwoo Choidfeccb12012-05-05 06:26:47 -07001989 .suspend_noirq = cm_suspend_noirq,
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001990 .complete = cm_suspend_complete,
1991};
1992
1993static struct platform_driver charger_manager_driver = {
1994 .driver = {
1995 .name = "charger-manager",
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001996 .pm = &charger_manager_pm,
Jonghwa Lee856ee612013-12-18 15:42:35 +09001997 .of_match_table = charger_manager_match,
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09001998 },
1999 .probe = charger_manager_probe,
Bill Pemberton28ea73f2012-11-19 13:20:40 -05002000 .remove = charger_manager_remove,
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09002001 .id_table = charger_manager_id,
2002};
2003
2004static int __init charger_manager_init(void)
2005{
Chanwoo Choid829dc72012-05-05 06:24:10 -07002006 cm_wq = create_freezable_workqueue("charger_manager");
2007 INIT_DELAYED_WORK(&cm_monitor_work, cm_monitor_poller);
2008
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09002009 return platform_driver_register(&charger_manager_driver);
2010}
2011late_initcall(charger_manager_init);
2012
2013static void __exit charger_manager_cleanup(void)
2014{
Chanwoo Choid829dc72012-05-05 06:24:10 -07002015 destroy_workqueue(cm_wq);
2016 cm_wq = NULL;
2017
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09002018 platform_driver_unregister(&charger_manager_driver);
2019}
2020module_exit(charger_manager_cleanup);
2021
Chanwoo Choidfeccb12012-05-05 06:26:47 -07002022/**
Chanwoo Choidfeccb12012-05-05 06:26:47 -07002023 * cm_notify_event - charger driver notify Charger Manager of charger event
2024 * @psy: pointer to instance of charger's power_supply
2025 * @type: type of charger event
2026 * @msg: optional message passed to uevent_notify fuction
2027 */
2028void cm_notify_event(struct power_supply *psy, enum cm_event_types type,
2029 char *msg)
2030{
2031 struct charger_manager *cm;
2032 bool found_power_supply = false;
2033
2034 if (psy == NULL)
2035 return;
2036
2037 mutex_lock(&cm_list_mtx);
2038 list_for_each_entry(cm, &cm_list, entry) {
Andy Shevchenko5f476822016-03-17 14:22:26 -07002039 if (match_string(cm->desc->psy_charger_stat, -1,
2040 psy->desc->name) >= 0) {
2041 found_power_supply = true;
Chanwoo Choidfeccb12012-05-05 06:26:47 -07002042 break;
Andy Shevchenko5f476822016-03-17 14:22:26 -07002043 }
Chanwoo Choidfeccb12012-05-05 06:26:47 -07002044 }
2045 mutex_unlock(&cm_list_mtx);
2046
2047 if (!found_power_supply)
2048 return;
2049
2050 switch (type) {
2051 case CM_EVENT_BATT_FULL:
2052 fullbatt_handler(cm);
2053 break;
2054 case CM_EVENT_BATT_OUT:
2055 battout_handler(cm);
2056 break;
2057 case CM_EVENT_BATT_IN:
2058 case CM_EVENT_EXT_PWR_IN_OUT ... CM_EVENT_CHG_START_STOP:
2059 misc_event_handler(cm, type);
2060 break;
2061 case CM_EVENT_UNKNOWN:
2062 case CM_EVENT_OTHERS:
2063 uevent_notify(cm, msg ? msg : default_event_names[type]);
2064 break;
2065 default:
Joe Perchese5409cb2013-06-06 18:25:12 -07002066 dev_err(cm->dev, "%s: type not specified\n", __func__);
Chanwoo Choidfeccb12012-05-05 06:26:47 -07002067 break;
2068 }
2069}
2070EXPORT_SYMBOL_GPL(cm_notify_event);
2071
Donggeun Kim3bb3dbb2011-12-27 18:47:48 +09002072MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
2073MODULE_DESCRIPTION("Charger Manager");
2074MODULE_LICENSE("GPL");