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power_supply: charger-manager: Decrement the power supply's device reference counter
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1/*
2 * Copyright (C) 2011 Samsung Electronics Co., Ltd.
3 * MyungJoo Ham <myungjoo.ham@samsung.com>
4 *
5 * This driver enables to monitor battery health and control charger
6 * during suspend-to-mem.
7 * Charger manager depends on other devices. register this later than
8 * the depending devices.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13**/
14
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15#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
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17#include <linux/io.h>
18#include <linux/module.h>
19#include <linux/irq.h>
20#include <linux/interrupt.h>
21#include <linux/rtc.h>
22#include <linux/slab.h>
23#include <linux/workqueue.h>
24#include <linux/platform_device.h>
25#include <linux/power/charger-manager.h>
26#include <linux/regulator/consumer.h>
3950c786 27#include <linux/sysfs.h>
856ee611 28#include <linux/of.h>
5c49a625
JL
29#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
3bb3dbbd 37
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CC
38static 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",
5c49a625
JL
43 [CM_EVENT_BATT_OVERHEAT] = "Battery Overheat",
44 [CM_EVENT_BATT_COLD] = "Battery Cold",
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CC
45 [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
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50/*
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 */
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72static struct alarm *cm_timer;
73
3bb3dbbd 74static bool cm_suspended;
c1155c64 75static bool cm_timer_set;
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76static unsigned long cm_suspend_duration_ms;
77
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78/* 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
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84/**
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;
bdbe8144 91 struct power_supply *psy;
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92 bool present = false;
93 int i, ret;
94
95 switch (cm->desc->battery_present) {
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CC
96 case CM_BATTERY_PRESENT:
97 present = true;
98 break;
99 case CM_NO_BATTERY:
100 break;
3bb3dbbd 101 case CM_FUEL_GAUGE:
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102 psy = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
103 if (!psy)
104 break;
105
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106 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_PRESENT,
107 &val);
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108 if (ret == 0 && val.intval)
109 present = true;
b43eb35a 110 power_supply_put(psy);
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111 break;
112 case CM_CHARGER_STAT:
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113 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
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122 ret = power_supply_get_property(psy,
123 POWER_SUPPLY_PROP_PRESENT, &val);
b43eb35a 124 power_supply_put(psy);
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125 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;
cdaf3e15 147 struct power_supply *psy;
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148 bool online = false;
149 int i, ret;
150
151 /* If at least one of them has one, it's yes. */
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152 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
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160 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_ONLINE,
161 &val);
b43eb35a 162 power_supply_put(psy);
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163 if (ret == 0 && val.intval) {
164 online = true;
165 break;
166 }
167 }
168
169 return online;
170}
171
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172/**
173 * 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;
bdbe8144 183 struct power_supply *fuel_gauge;
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184 int ret;
185
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186 fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
187 if (!fuel_gauge)
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188 return -ENODEV;
189
b70229bc 190 ret = power_supply_get_property(fuel_gauge,
bb2a95c2 191 POWER_SUPPLY_PROP_VOLTAGE_NOW, &val);
b43eb35a 192 power_supply_put(fuel_gauge);
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193 if (ret)
194 return ret;
195
196 *uV = val.intval;
197 return 0;
198}
199
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200/**
201 * 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;
cdaf3e15 208 struct power_supply *psy;
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209 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 */
cdaf3e15 216 for (i = 0; cm->desc->psy_charger_stat[i]; i++) {
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217 /* 1. The charger sholuld not be DISABLED */
218 if (cm->emergency_stop)
219 continue;
220 if (!cm->charger_enabled)
221 continue;
222
cdaf3e15
KK
223 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
3bb3dbbd 230 /* 2. The charger should be online (ext-power) */
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231 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_ONLINE,
232 &val);
3bb3dbbd 233 if (ret) {
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234 dev_warn(cm->dev, "Cannot read ONLINE value from %s\n",
235 cm->desc->psy_charger_stat[i]);
b43eb35a 236 power_supply_put(psy);
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237 continue;
238 }
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239 if (val.intval == 0) {
240 power_supply_put(psy);
3bb3dbbd 241 continue;
b43eb35a 242 }
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243
244 /*
245 * 3. The charger should not be FULL, DISCHARGING,
246 * or NOT_CHARGING.
247 */
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248 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_STATUS,
249 &val);
b43eb35a 250 power_supply_put(psy);
3bb3dbbd 251 if (ret) {
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252 dev_warn(cm->dev, "Cannot read STATUS value from %s\n",
253 cm->desc->psy_charger_stat[i]);
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254 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
2ed9e9b6
CC
269/**
270 * 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;
bdbe8144 277 struct power_supply *fuel_gauge;
b43eb35a 278 bool is_full = false;
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CC
279 int ret = 0;
280 int uV;
281
282 /* If there is no battery, it cannot be charged */
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CC
283 if (!is_batt_present(cm))
284 return false;
2ed9e9b6 285
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286 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) {
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CC
291 val.intval = 0;
292
2ed9e9b6 293 /* Not full if capacity of fuel gauge isn't full */
b70229bc 294 ret = power_supply_get_property(fuel_gauge,
2ed9e9b6 295 POWER_SUPPLY_PROP_CHARGE_FULL, &val);
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KK
296 if (!ret && val.intval > desc->fullbatt_full_capacity) {
297 is_full = true;
298 goto out;
299 }
2ed9e9b6
CC
300 }
301
302 /* Full, if it's over the fullbatt voltage */
303 if (desc->fullbatt_uV > 0) {
304 ret = get_batt_uV(cm, &uV);
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KK
305 if (!ret && uV >= desc->fullbatt_uV) {
306 is_full = true;
307 goto out;
308 }
2ed9e9b6
CC
309 }
310
311 /* Full, if the capacity is more than fullbatt_soc */
bdbe8144 312 if (desc->fullbatt_soc > 0) {
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CC
313 val.intval = 0;
314
b70229bc 315 ret = power_supply_get_property(fuel_gauge,
2ed9e9b6 316 POWER_SUPPLY_PROP_CAPACITY, &val);
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KK
317 if (!ret && val.intval >= desc->fullbatt_soc) {
318 is_full = true;
319 goto out;
320 }
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CC
321 }
322
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KK
323out:
324 power_supply_put(fuel_gauge);
325 return is_full;
2ed9e9b6
CC
326}
327
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328/**
329 * 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",
e5409cbd 345 cm->desc->polling_mode);
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346 }
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 */
bb2a95c2 367 if (enable == cm->charger_enabled)
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368 return 0;
369
370 if (enable) {
371 if (cm->emergency_stop)
372 return -EAGAIN;
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CC
373
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
dbb61fc7 381 for (i = 0 ; i < desc->num_charger_regulators ; i++) {
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CC
382 if (desc->charger_regulators[i].externally_control)
383 continue;
384
dbb61fc7
CC
385 err = regulator_enable(desc->charger_regulators[i].consumer);
386 if (err < 0) {
e5409cbd
JP
387 dev_warn(cm->dev, "Cannot enable %s regulator\n",
388 desc->charger_regulators[i].regulator_name);
dbb61fc7
CC
389 }
390 }
3bb3dbbd 391 } else {
8fcfe088
CC
392 /*
393 * 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
dbb61fc7 399 for (i = 0 ; i < desc->num_charger_regulators ; i++) {
3950c786
CC
400 if (desc->charger_regulators[i].externally_control)
401 continue;
402
dbb61fc7
CC
403 err = regulator_disable(desc->charger_regulators[i].consumer);
404 if (err < 0) {
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JP
405 dev_warn(cm->dev, "Cannot disable %s regulator\n",
406 desc->charger_regulators[i].regulator_name);
dbb61fc7
CC
407 }
408 }
409
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410 /*
411 * Abnormal battery state - Stop charging forcibly,
412 * even if charger was enabled at the other places
413 */
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414 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);
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JP
419 dev_warn(cm->dev, "Disable regulator(%s) forcibly\n",
420 desc->charger_regulators[i].regulator_name);
3bb3dbbd
DK
421 }
422 }
423 }
424
425 if (!err)
426 cm->charger_enabled = enable;
427
428 return err;
429}
430
d829dc75
CC
431/**
432 * 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
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451/**
452 * 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. */
bb2a95c2 479 strncpy(env_str_save, event, UEVENT_BUF_SIZE);
3bb3dbbd
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480 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
e5409cbd 503 dev_info(cm->dev, "%s\n", event);
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DK
504}
505
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CC
506/**
507 * 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) {
e5409cbd 531 dev_err(cm->dev, "%s: get_batt_uV error(%d)\n", __func__, err);
d829dc75
CC
532 return;
533 }
534
f36b9ddb
CC
535 diff = desc->fullbatt_uV - batt_uV;
536 if (diff < 0)
537 return;
d829dc75 538
e5409cbd 539 dev_info(cm->dev, "VBATT dropped %duV after full-batt\n", diff);
d829dc75
CC
540
541 if (diff > desc->fullbatt_vchkdrop_uV) {
542 try_charger_restart(cm);
8fcfe088
CC
543 uevent_notify(cm, "Recharging");
544 }
545}
546
547/**
548 * 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) {
856ee611 572 dev_info(cm->dev, "Charging duration exceed %ums\n",
8fcfe088
CC
573 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)) {
856ee611 583 dev_info(cm->dev, "Discharging duration exceed %ums\n",
8fcfe088 584 desc->discharging_max_duration_ms);
e5409cbd 585 uevent_notify(cm, "Recharging");
8fcfe088
CC
586 try_charger_enable(cm, true);
587 ret = true;
588 }
d829dc75 589 }
8fcfe088
CC
590
591 return ret;
d829dc75
CC
592}
593
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594static int cm_get_battery_temperature_by_psy(struct charger_manager *cm,
595 int *temp)
596{
597 struct power_supply *fuel_gauge;
b43eb35a 598 int ret;
bdbe8144
KK
599
600 fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
601 if (!fuel_gauge)
602 return -ENODEV;
603
b43eb35a 604 ret = power_supply_get_property(fuel_gauge,
bdbe8144
KK
605 POWER_SUPPLY_PROP_TEMP,
606 (union power_supply_propval *)temp);
b43eb35a
KK
607 power_supply_put(fuel_gauge);
608
609 return ret;
bdbe8144
KK
610}
611
5c49a625
JL
612static 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
bdbe8144
KK
621 if (cm->tzd_batt) {
622 ret = thermal_zone_get_temp(cm->tzd_batt, (unsigned long *)temp);
623 if (!ret)
624 /* Calibrate temperature unit */
625 *temp /= 100;
626 } else
5c49a625 627#endif
bdbe8144
KK
628 {
629 /* if-else continued from CONFIG_THERMAL */
630 ret = cm_get_battery_temperature_by_psy(cm, temp);
631 }
632
5c49a625
JL
633 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
3bb3dbbd
DK
669/**
670 * _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{
5c49a625 678 int temp_alrt;
3bb3dbbd 679
5c49a625 680 temp_alrt = cm_check_thermal_status(cm);
3bb3dbbd 681
2ed9e9b6 682 /* It has been stopped already */
5c49a625 683 if (temp_alrt && cm->emergency_stop)
3bb3dbbd
DK
684 return false;
685
2ed9e9b6
CC
686 /*
687 * Check temperature whether overheat or cold.
688 * If temperature is out of range normal state, stop charging.
689 */
5c49a625
JL
690 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]);
2ed9e9b6 694
8fcfe088
CC
695 /*
696 * 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,
e5409cbd 701 "Charging/Discharging duration is out of range\n");
2ed9e9b6
CC
702 /*
703 * 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) {
e5409cbd 717 dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged\n");
2ed9e9b6
CC
718 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);
3bb3dbbd
DK
723 } else {
724 cm->emergency_stop = 0;
2ed9e9b6
CC
725 if (is_ext_pwr_online(cm)) {
726 if (!try_charger_enable(cm, true))
727 uevent_notify(cm, "CHARGING");
728 }
3bb3dbbd
DK
729 }
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
bb2a95c2
AL
747 list_for_each_entry(cm, &cm_list, entry) {
748 if (_cm_monitor(cm))
749 stop = true;
750 }
3bb3dbbd
DK
751
752 mutex_unlock(&cm_list_mtx);
753
754 return stop;
755}
756
d829dc75
CC
757/**
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
2fbb520d
TH
791 /*
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 */
d829dc75
CC
797 _next_polling = jiffies + polling_jiffy;
798
2fbb520d 799 if (time_before(_next_polling, next_polling)) {
41f63c53 800 mod_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy);
2fbb520d
TH
801 next_polling = _next_polling;
802 } else {
803 if (queue_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy))
804 next_polling = _next_polling;
d829dc75 805 }
d829dc75
CC
806out:
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
dfeccb12
CC
824/**
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
41f63c53
TH
838 mod_delayed_work(cm_wq, &cm->fullbatt_vchk_work,
839 msecs_to_jiffies(desc->fullbatt_vchkdrop_ms));
dfeccb12
CC
840 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:
e5409cbd 847 dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged\n");
dfeccb12
CC
848 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
2fbb520d 879 if (is_polling_required(cm) && cm->desc->polling_interval_ms)
dfeccb12
CC
880 schedule_work(&setup_polling);
881 uevent_notify(cm, default_event_names[type]);
882}
883
ad3d13ee
DK
884static int charger_get_property(struct power_supply *psy,
885 enum power_supply_property psp,
886 union power_supply_propval *val)
887{
297d716f 888 struct charger_manager *cm = power_supply_get_drvdata(psy);
ad3d13ee 889 struct charger_desc *desc = cm->desc;
b43eb35a 890 struct power_supply *fuel_gauge = NULL;
df58c04c
AV
891 int ret = 0;
892 int uV;
ad3d13ee
DK
893
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:
df58c04c 918 ret = get_batt_uV(cm, &val->intval);
ad3d13ee
DK
919 break;
920 case POWER_SUPPLY_PROP_CURRENT_NOW:
bdbe8144
KK
921 fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
922 if (!fuel_gauge) {
923 ret = -ENODEV;
924 break;
925 }
b70229bc 926 ret = power_supply_get_property(fuel_gauge,
ad3d13ee
DK
927 POWER_SUPPLY_PROP_CURRENT_NOW, val);
928 break;
929 case POWER_SUPPLY_PROP_TEMP:
ad3d13ee 930 case POWER_SUPPLY_PROP_TEMP_AMBIENT:
5c49a625 931 return cm_get_battery_temperature(cm, &val->intval);
ad3d13ee 932 case POWER_SUPPLY_PROP_CAPACITY:
ad3d13ee
DK
933 if (!is_batt_present(cm)) {
934 /* There is no battery. Assume 100% */
935 val->intval = 100;
936 break;
937 }
938
b43eb35a
KK
939 fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
940 if (!fuel_gauge) {
941 ret = -ENODEV;
942 break;
943 }
944
b70229bc 945 ret = power_supply_get_property(fuel_gauge,
ad3d13ee
DK
946 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:
2ed9e9b6 986 if (is_full_charged(cm))
ad3d13ee 987 val->intval = 1;
2ed9e9b6
CC
988 else
989 val->intval = 0;
ad3d13ee
DK
990 ret = 0;
991 break;
992 case POWER_SUPPLY_PROP_CHARGE_NOW:
993 if (is_charging(cm)) {
bdbe8144
KK
994 fuel_gauge = power_supply_get_by_name(
995 cm->desc->psy_fuel_gauge);
996 if (!fuel_gauge) {
997 ret = -ENODEV;
998 break;
999 }
1000
b70229bc 1001 ret = power_supply_get_property(fuel_gauge,
ad3d13ee
DK
1002 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 }
b43eb35a
KK
1019 if (fuel_gauge)
1020 power_supply_put(fuel_gauge);
ad3d13ee
DK
1021 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
297d716f 1043static const struct power_supply_desc psy_default = {
ad3d13ee
DK
1044 .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,
ba9c9182 1049 .no_thermal = true,
ad3d13ee
DK
1050};
1051
3bb3dbbd
DK
1052/**
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;
c1155c64 1066 int timer_req = 0;
3bb3dbbd 1067
c1155c64
JL
1068 if (time_after(next_polling, jiffies))
1069 CM_MIN_VALID(wakeup_ms,
1070 jiffies_to_msecs(next_polling - jiffies));
3bb3dbbd 1071
c1155c64 1072 mutex_lock(&cm_list_mtx);
3bb3dbbd 1073 list_for_each_entry(cm, &cm_list, entry) {
d829dc75
CC
1074 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
3bb3dbbd
DK
1089 /* Skip if polling is not required for this CM */
1090 if (!is_polling_required(cm) && !cm->emergency_stop)
1091 continue;
c1155c64 1092 timer_req++;
3bb3dbbd
DK
1093 if (cm->desc->polling_interval_ms == 0)
1094 continue;
1095 CM_MIN_VALID(wakeup_ms, cm->desc->polling_interval_ms);
1096 }
3bb3dbbd
DK
1097 mutex_unlock(&cm_list_mtx);
1098
c1155c64
JL
1099 if (timer_req && cm_timer) {
1100 ktime_t now, add;
3bb3dbbd 1101
c1155c64
JL
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;
3bb3dbbd 1109
c1155c64 1110 pr_info("Charger Manager wakeup timer: %u ms\n", wakeup_ms);
3bb3dbbd 1111
c1155c64
JL
1112 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));
3bb3dbbd 1116
c1155c64 1117 cm_suspend_duration_ms = wakeup_ms;
3bb3dbbd 1118
c1155c64 1119 return true;
3bb3dbbd 1120 }
3bb3dbbd
DK
1121 return false;
1122}
1123
bee737bc
CC
1124/**
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);
45cd4fb2
CC
1134 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",
e5409cbd 1141 cable->charger->regulator_name, cable->name);
45cd4fb2
CC
1142 return;
1143 }
1144
1145 pr_info("Set current limit of %s : %duA ~ %duA\n",
e5409cbd
JP
1146 cable->charger->regulator_name,
1147 cable->min_uA, cable->max_uA);
45cd4fb2 1148 }
bee737bc
CC
1149
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
2ed9e9b6
CC
1167 /*
1168 * The newly state of charger cable.
1169 * If cable is attached, cable->attached is true.
1170 */
bee737bc 1171 cable->attached = event;
2ed9e9b6
CC
1172
1173 /*
1174 * Setup monitoring to check battery state
1175 * when charger cable is attached.
1176 */
1177 if (cable->attached && is_polling_required(cable->cm)) {
2fbb520d 1178 cancel_work_sync(&setup_polling);
2ed9e9b6
CC
1179 schedule_work(&setup_polling);
1180 }
1181
1182 /*
1183 * Setup work for controlling charger(regulator)
1184 * according to charger cable.
1185 */
bee737bc
CC
1186 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) {
e5409cbd
JP
1213 pr_info("Cannot register extcon_dev for %s(cable: %s)\n",
1214 cable->extcon_name, cable->name);
bee737bc
CC
1215 ret = -EINVAL;
1216 }
1217
1218 return ret;
1219}
1220
41468a11
CC
1221/**
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);
5a6c2208 1244 if (IS_ERR(charger->consumer)) {
e5409cbd
JP
1245 dev_err(cm->dev, "Cannot find charger(%s)\n",
1246 charger->regulator_name);
5a6c2208 1247 return PTR_ERR(charger->consumer);
41468a11
CC
1248 }
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) {
e5409cbd
JP
1256 dev_err(cm->dev, "Cannot initialize charger(%s)\n",
1257 charger->regulator_name);
41468a11
CC
1258 goto err;
1259 }
1260 cable->charger = charger;
1261 cable->cm = cm;
1262 }
1263 }
1264
1265err:
1266 return ret;
1267}
1268
3950c786
CC
1269/* 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 &&
41468a11 1328 !desc->charger_regulators[i].externally_control) {
3950c786
CC
1329 /*
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,
e5409cbd
JP
1348 "'%s' regulator should be controlled in charger-manager because charger-manager must need at least one charger for charging\n",
1349 charger->regulator_name);
3950c786
CC
1350 }
1351
1352 return count;
1353}
1354
41468a11
CC
1355/**
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);
883c10a9
JL
1383 str = devm_kzalloc(cm->dev,
1384 sizeof(char) * (strlen(buf) + 1), GFP_KERNEL);
41468a11 1385 if (!str) {
41468a11
CC
1386 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
e5409cbd
JP
1421 dev_info(cm->dev, "'%s' regulator's externally_control is %d\n",
1422 charger->regulator_name, charger->externally_control);
41468a11 1423
297d716f 1424 ret = sysfs_create_group(&cm->charger_psy->dev.kobj,
41468a11
CC
1425 &charger->attr_g);
1426 if (ret < 0) {
e5409cbd
JP
1427 dev_err(cm->dev, "Cannot create sysfs entry of %s regulator\n",
1428 charger->regulator_name);
41468a11
CC
1429 ret = -EINVAL;
1430 goto err;
1431 }
1432 }
1433
1434 if (chargers_externally_control) {
e5409cbd 1435 dev_err(cm->dev, "Cannot register regulator because charger-manager must need at least one charger for charging battery\n");
41468a11
CC
1436 ret = -EINVAL;
1437 goto err;
1438 }
1439
1440err:
1441 return ret;
1442}
1443
bdbe8144
KK
1444static int cm_init_thermal_data(struct charger_manager *cm,
1445 struct power_supply *fuel_gauge)
5c49a625
JL
1446{
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 */
b70229bc 1452 ret = power_supply_get_property(fuel_gauge,
5c49a625
JL
1453 POWER_SUPPLY_PROP_TEMP, &val);
1454
1455 if (!ret) {
297d716f 1456 cm->charger_psy_desc.properties[cm->charger_psy_desc.num_properties] =
5c49a625 1457 POWER_SUPPLY_PROP_TEMP;
297d716f 1458 cm->charger_psy_desc.num_properties++;
5c49a625
JL
1459 cm->desc->measure_battery_temp = true;
1460 }
1461#ifdef CONFIG_THERMAL
5c49a625
JL
1462 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 */
297d716f 1469 cm->charger_psy_desc.properties[cm->charger_psy_desc.num_properties] =
5c49a625 1470 POWER_SUPPLY_PROP_TEMP_AMBIENT;
297d716f 1471 cm->charger_psy_desc.num_properties++;
5c49a625
JL
1472 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
856ee611
JL
1487static struct of_device_id charger_manager_match[] = {
1488 {
1489 .compatible = "charger-manager",
1490 },
1491 {},
1492};
1493
434a09f9 1494static struct charger_desc *of_cm_parse_desc(struct device *dev)
856ee611
JL
1495{
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);
1584 if (!cables)
1585 return ERR_PTR(-ENOMEM);
1586
1587 chg_regs->cables = cables;
1588
1589 for_each_child_of_node(child, _child) {
1590 of_property_read_string(_child,
1591 "cm-cable-name", &cables->name);
1592 of_property_read_string(_child,
1593 "cm-cable-extcon",
1594 &cables->extcon_name);
1595 of_property_read_u32(_child,
1596 "cm-cable-min",
1597 &cables->min_uA);
1598 of_property_read_u32(_child,
1599 "cm-cable-max",
1600 &cables->max_uA);
1601 cables++;
1602 }
1603 }
1604 chg_regs++;
1605 }
1606 }
1607 return desc;
1608}
1609
1610static inline struct charger_desc *cm_get_drv_data(struct platform_device *pdev)
1611{
1612 if (pdev->dev.of_node)
1613 return of_cm_parse_desc(&pdev->dev);
86515b7d 1614 return dev_get_platdata(&pdev->dev);
856ee611
JL
1615}
1616
c1155c64
JL
1617static enum alarmtimer_restart cm_timer_func(struct alarm *alarm, ktime_t now)
1618{
1619 cm_timer_set = false;
1620 return ALARMTIMER_NORESTART;
1621}
1622
3bb3dbbd
DK
1623static int charger_manager_probe(struct platform_device *pdev)
1624{
856ee611 1625 struct charger_desc *desc = cm_get_drv_data(pdev);
3bb3dbbd
DK
1626 struct charger_manager *cm;
1627 int ret = 0, i = 0;
bee737bc 1628 int j = 0;
ad3d13ee 1629 union power_supply_propval val;
bdbe8144 1630 struct power_supply *fuel_gauge;
297d716f 1631 struct power_supply_config psy_cfg = {};
3bb3dbbd 1632
c6738d06 1633 if (IS_ERR(desc)) {
e5409cbd 1634 dev_err(&pdev->dev, "No platform data (desc) found\n");
883c10a9 1635 return -ENODEV;
3bb3dbbd
DK
1636 }
1637
883c10a9
JL
1638 cm = devm_kzalloc(&pdev->dev,
1639 sizeof(struct charger_manager), GFP_KERNEL);
1640 if (!cm)
1641 return -ENOMEM;
3bb3dbbd
DK
1642
1643 /* Basic Values. Unspecified are Null or 0 */
1644 cm->dev = &pdev->dev;
883c10a9 1645 cm->desc = desc;
297d716f 1646 psy_cfg.drv_data = cm;
3bb3dbbd 1647
c1155c64
JL
1648 /* Initialize alarm timer */
1649 if (alarmtimer_get_rtcdev()) {
1650 cm_timer = devm_kzalloc(cm->dev, sizeof(*cm_timer), GFP_KERNEL);
1651 alarm_init(cm_timer, ALARM_BOOTTIME, cm_timer_func);
1652 }
1653
d829dc75
CC
1654 /*
1655 * The following two do not need to be errors.
1656 * Users may intentionally ignore those two features.
1657 */
1658 if (desc->fullbatt_uV == 0) {
e5409cbd 1659 dev_info(&pdev->dev, "Ignoring full-battery voltage threshold as it is not supplied\n");
d829dc75
CC
1660 }
1661 if (!desc->fullbatt_vchkdrop_ms || !desc->fullbatt_vchkdrop_uV) {
e5409cbd 1662 dev_info(&pdev->dev, "Disabling full-battery voltage drop checking mechanism as it is not supplied\n");
d829dc75
CC
1663 desc->fullbatt_vchkdrop_ms = 0;
1664 desc->fullbatt_vchkdrop_uV = 0;
1665 }
2ed9e9b6 1666 if (desc->fullbatt_soc == 0) {
e5409cbd 1667 dev_info(&pdev->dev, "Ignoring full-battery soc(state of charge) threshold as it is not supplied\n");
2ed9e9b6
CC
1668 }
1669 if (desc->fullbatt_full_capacity == 0) {
e5409cbd 1670 dev_info(&pdev->dev, "Ignoring full-battery full capacity threshold as it is not supplied\n");
2ed9e9b6 1671 }
d829dc75 1672
3bb3dbbd 1673 if (!desc->charger_regulators || desc->num_charger_regulators < 1) {
e5409cbd 1674 dev_err(&pdev->dev, "charger_regulators undefined\n");
883c10a9 1675 return -EINVAL;
3bb3dbbd
DK
1676 }
1677
1678 if (!desc->psy_charger_stat || !desc->psy_charger_stat[0]) {
e5409cbd 1679 dev_err(&pdev->dev, "No power supply defined\n");
883c10a9 1680 return -EINVAL;
3bb3dbbd
DK
1681 }
1682
661a8886
KK
1683 if (!desc->psy_fuel_gauge) {
1684 dev_err(&pdev->dev, "No fuel gauge power supply defined\n");
1685 return -EINVAL;
1686 }
1687
3bb3dbbd
DK
1688 /* Counting index only */
1689 while (desc->psy_charger_stat[i])
1690 i++;
1691
cdaf3e15 1692 /* Check if charger's supplies are present at probe */
3bb3dbbd 1693 for (i = 0; desc->psy_charger_stat[i]; i++) {
cdaf3e15
KK
1694 struct power_supply *psy;
1695
1696 psy = power_supply_get_by_name(desc->psy_charger_stat[i]);
1697 if (!psy) {
e5409cbd
JP
1698 dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n",
1699 desc->psy_charger_stat[i]);
883c10a9 1700 return -ENODEV;
3bb3dbbd 1701 }
b43eb35a 1702 power_supply_put(psy);
3bb3dbbd
DK
1703 }
1704
1705 if (desc->polling_interval_ms == 0 ||
1706 msecs_to_jiffies(desc->polling_interval_ms) <= CM_JIFFIES_SMALL) {
1707 dev_err(&pdev->dev, "polling_interval_ms is too small\n");
883c10a9 1708 return -EINVAL;
3bb3dbbd
DK
1709 }
1710
8fcfe088
CC
1711 if (!desc->charging_max_duration_ms ||
1712 !desc->discharging_max_duration_ms) {
e5409cbd 1713 dev_info(&pdev->dev, "Cannot limit charging duration checking mechanism to prevent overcharge/overheat and control discharging duration\n");
8fcfe088
CC
1714 desc->charging_max_duration_ms = 0;
1715 desc->discharging_max_duration_ms = 0;
1716 }
1717
3bb3dbbd
DK
1718 platform_set_drvdata(pdev, cm);
1719
297d716f 1720 memcpy(&cm->charger_psy_desc, &psy_default, sizeof(psy_default));
bb2a95c2 1721
41468a11 1722 if (!desc->psy_name)
bb2a95c2 1723 strncpy(cm->psy_name_buf, psy_default.name, PSY_NAME_MAX);
41468a11 1724 else
ad3d13ee 1725 strncpy(cm->psy_name_buf, desc->psy_name, PSY_NAME_MAX);
297d716f 1726 cm->charger_psy_desc.name = cm->psy_name_buf;
ad3d13ee
DK
1727
1728 /* Allocate for psy properties because they may vary */
297d716f 1729 cm->charger_psy_desc.properties = devm_kzalloc(&pdev->dev,
883c10a9 1730 sizeof(enum power_supply_property)
ad3d13ee 1731 * (ARRAY_SIZE(default_charger_props) +
883c10a9 1732 NUM_CHARGER_PSY_OPTIONAL), GFP_KERNEL);
297d716f 1733 if (!cm->charger_psy_desc.properties)
883c10a9
JL
1734 return -ENOMEM;
1735
297d716f 1736 memcpy(cm->charger_psy_desc.properties, default_charger_props,
ad3d13ee
DK
1737 sizeof(enum power_supply_property) *
1738 ARRAY_SIZE(default_charger_props));
297d716f 1739 cm->charger_psy_desc.num_properties = psy_default.num_properties;
ad3d13ee
DK
1740
1741 /* Find which optional psy-properties are available */
b43eb35a
KK
1742 fuel_gauge = power_supply_get_by_name(desc->psy_fuel_gauge);
1743 if (!fuel_gauge) {
1744 dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n",
1745 desc->psy_fuel_gauge);
1746 return -ENODEV;
1747 }
b70229bc 1748 if (!power_supply_get_property(fuel_gauge,
ad3d13ee 1749 POWER_SUPPLY_PROP_CHARGE_NOW, &val)) {
297d716f 1750 cm->charger_psy_desc.properties[cm->charger_psy_desc.num_properties] =
ad3d13ee 1751 POWER_SUPPLY_PROP_CHARGE_NOW;
297d716f 1752 cm->charger_psy_desc.num_properties++;
ad3d13ee 1753 }
b70229bc 1754 if (!power_supply_get_property(fuel_gauge,
ad3d13ee
DK
1755 POWER_SUPPLY_PROP_CURRENT_NOW,
1756 &val)) {
297d716f 1757 cm->charger_psy_desc.properties[cm->charger_psy_desc.num_properties] =
ad3d13ee 1758 POWER_SUPPLY_PROP_CURRENT_NOW;
297d716f 1759 cm->charger_psy_desc.num_properties++;
ad3d13ee 1760 }
bb2a95c2 1761
bdbe8144 1762 ret = cm_init_thermal_data(cm, fuel_gauge);
5c49a625
JL
1763 if (ret) {
1764 dev_err(&pdev->dev, "Failed to initialize thermal data\n");
1765 cm->desc->measure_battery_temp = false;
ad3d13ee 1766 }
b43eb35a 1767 power_supply_put(fuel_gauge);
ad3d13ee 1768
d829dc75
CC
1769 INIT_DELAYED_WORK(&cm->fullbatt_vchk_work, fullbatt_vchk);
1770
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KK
1771 cm->charger_psy = power_supply_register(NULL, &cm->charger_psy_desc,
1772 &psy_cfg);
1773 if (IS_ERR(cm->charger_psy)) {
e5409cbd 1774 dev_err(&pdev->dev, "Cannot register charger-manager with name \"%s\"\n",
297d716f
KK
1775 cm->charger_psy->desc->name);
1776 return PTR_ERR(cm->charger_psy);
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DK
1777 }
1778
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CC
1779 /* Register extcon device for charger cable */
1780 ret = charger_manager_register_extcon(cm);
1781 if (ret < 0) {
1782 dev_err(&pdev->dev, "Cannot initialize extcon device\n");
1783 goto err_reg_extcon;
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DK
1784 }
1785
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CC
1786 /* Register sysfs entry for charger(regulator) */
1787 ret = charger_manager_register_sysfs(cm);
1788 if (ret < 0) {
1789 dev_err(&pdev->dev,
1790 "Cannot initialize sysfs entry of regulator\n");
1791 goto err_reg_sysfs;
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DK
1792 }
1793
1794 /* Add to the list */
1795 mutex_lock(&cm_list_mtx);
1796 list_add(&cm->entry, &cm_list);
1797 mutex_unlock(&cm_list_mtx);
1798
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CC
1799 /*
1800 * Charger-manager is capable of waking up the systme from sleep
1801 * when event is happend through cm_notify_event()
1802 */
1803 device_init_wakeup(&pdev->dev, true);
1804 device_set_wakeup_capable(&pdev->dev, false);
1805
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CC
1806 /*
1807 * Charger-manager have to check the charging state right after
1808 * tialization of charger-manager and then update current charging
1809 * state.
1810 */
1811 cm_monitor();
1812
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CC
1813 schedule_work(&setup_polling);
1814
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DK
1815 return 0;
1816
41468a11 1817err_reg_sysfs:
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CC
1818 for (i = 0; i < desc->num_charger_regulators; i++) {
1819 struct charger_regulator *charger;
1820
1821 charger = &desc->charger_regulators[i];
297d716f 1822 sysfs_remove_group(&cm->charger_psy->dev.kobj,
3950c786 1823 &charger->attr_g);
3950c786 1824 }
41468a11
CC
1825err_reg_extcon:
1826 for (i = 0; i < desc->num_charger_regulators; i++) {
1827 struct charger_regulator *charger;
1828
1829 charger = &desc->charger_regulators[i];
1830 for (j = 0; j < charger->num_cables; j++) {
bee737bc 1831 struct charger_cable *cable = &charger->cables[j];
3cc9d269
JL
1832 /* Remove notifier block if only edev exists */
1833 if (cable->extcon_dev.edev)
1834 extcon_unregister_interest(&cable->extcon_dev);
bee737bc 1835 }
41468a11 1836
bee737bc 1837 regulator_put(desc->charger_regulators[i].consumer);
41468a11 1838 }
bee737bc 1839
297d716f 1840 power_supply_unregister(cm->charger_psy);
883c10a9 1841
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DK
1842 return ret;
1843}
1844
415ec69f 1845static int charger_manager_remove(struct platform_device *pdev)
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DK
1846{
1847 struct charger_manager *cm = platform_get_drvdata(pdev);
1848 struct charger_desc *desc = cm->desc;
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CC
1849 int i = 0;
1850 int j = 0;
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1851
1852 /* Remove from the list */
1853 mutex_lock(&cm_list_mtx);
1854 list_del(&cm->entry);
1855 mutex_unlock(&cm_list_mtx);
1856
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TH
1857 cancel_work_sync(&setup_polling);
1858 cancel_delayed_work_sync(&cm_monitor_work);
d829dc75 1859
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CC
1860 for (i = 0 ; i < desc->num_charger_regulators ; i++) {
1861 struct charger_regulator *charger
1862 = &desc->charger_regulators[i];
1863 for (j = 0 ; j < charger->num_cables ; j++) {
1864 struct charger_cable *cable = &charger->cables[j];
1865 extcon_unregister_interest(&cable->extcon_dev);
1866 }
1867 }
1868
1869 for (i = 0 ; i < desc->num_charger_regulators ; i++)
1870 regulator_put(desc->charger_regulators[i].consumer);
1871
297d716f 1872 power_supply_unregister(cm->charger_psy);
d829dc75
CC
1873
1874 try_charger_enable(cm, false);
1875
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DK
1876 return 0;
1877}
1878
1bbe24d4 1879static const struct platform_device_id charger_manager_id[] = {
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1880 { "charger-manager", 0 },
1881 { },
1882};
1bbe24d4 1883MODULE_DEVICE_TABLE(platform, charger_manager_id);
3bb3dbbd 1884
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CC
1885static int cm_suspend_noirq(struct device *dev)
1886{
1887 int ret = 0;
1888
1889 if (device_may_wakeup(dev)) {
1890 device_set_wakeup_capable(dev, false);
1891 ret = -EAGAIN;
1892 }
1893
1894 return ret;
1895}
1896
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JL
1897static bool cm_need_to_awake(void)
1898{
1899 struct charger_manager *cm;
1900
1901 if (cm_timer)
1902 return false;
1903
1904 mutex_lock(&cm_list_mtx);
1905 list_for_each_entry(cm, &cm_list, entry) {
1906 if (is_charging(cm)) {
1907 mutex_unlock(&cm_list_mtx);
1908 return true;
1909 }
1910 }
1911 mutex_unlock(&cm_list_mtx);
1912
1913 return false;
1914}
1915
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1916static int cm_suspend_prepare(struct device *dev)
1917{
bb2a95c2 1918 struct charger_manager *cm = dev_get_drvdata(dev);
3bb3dbbd 1919
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JL
1920 if (cm_need_to_awake())
1921 return -EBUSY;
3bb3dbbd 1922
c1155c64 1923 if (!cm_suspended)
3bb3dbbd 1924 cm_suspended = true;
3bb3dbbd 1925
c1155c64 1926 cm_timer_set = cm_setup_timer();
3bb3dbbd 1927
c1155c64
JL
1928 if (cm_timer_set) {
1929 cancel_work_sync(&setup_polling);
1930 cancel_delayed_work_sync(&cm_monitor_work);
1931 cancel_delayed_work(&cm->fullbatt_vchk_work);
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1932 }
1933
1934 return 0;
1935}
1936
1937static void cm_suspend_complete(struct device *dev)
1938{
bb2a95c2 1939 struct charger_manager *cm = dev_get_drvdata(dev);
3bb3dbbd 1940
c1155c64 1941 if (cm_suspended)
3bb3dbbd 1942 cm_suspended = false;
c1155c64
JL
1943
1944 if (cm_timer_set) {
1945 ktime_t remain;
1946
1947 alarm_cancel(cm_timer);
1948 cm_timer_set = false;
1949 remain = alarm_expires_remaining(cm_timer);
1950 cm_suspend_duration_ms -= ktime_to_ms(remain);
1951 schedule_work(&setup_polling);
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1952 }
1953
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1954 _cm_monitor(cm);
1955
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CC
1956 /* Re-enqueue delayed work (fullbatt_vchk_work) */
1957 if (cm->fullbatt_vchk_jiffies_at) {
1958 unsigned long delay = 0;
1959 unsigned long now = jiffies + CM_JIFFIES_SMALL;
1960
1961 if (time_after_eq(now, cm->fullbatt_vchk_jiffies_at)) {
1962 delay = (unsigned long)((long)now
1963 - (long)(cm->fullbatt_vchk_jiffies_at));
1964 delay = jiffies_to_msecs(delay);
1965 } else {
1966 delay = 0;
1967 }
1968
1969 /*
c1155c64
JL
1970 * Account for cm_suspend_duration_ms with assuming that
1971 * timer stops in suspend.
d829dc75 1972 */
c1155c64
JL
1973 if (delay > cm_suspend_duration_ms)
1974 delay -= cm_suspend_duration_ms;
1975 else
1976 delay = 0;
d829dc75
CC
1977
1978 queue_delayed_work(cm_wq, &cm->fullbatt_vchk_work,
1979 msecs_to_jiffies(delay));
1980 }
dfeccb12 1981 device_set_wakeup_capable(cm->dev, false);
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1982}
1983
1984static const struct dev_pm_ops charger_manager_pm = {
1985 .prepare = cm_suspend_prepare,
dfeccb12 1986 .suspend_noirq = cm_suspend_noirq,
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DK
1987 .complete = cm_suspend_complete,
1988};
1989
1990static struct platform_driver charger_manager_driver = {
1991 .driver = {
1992 .name = "charger-manager",
3bb3dbbd 1993 .pm = &charger_manager_pm,
856ee611 1994 .of_match_table = charger_manager_match,
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DK
1995 },
1996 .probe = charger_manager_probe,
28ea73f4 1997 .remove = charger_manager_remove,
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1998 .id_table = charger_manager_id,
1999};
2000
2001static int __init charger_manager_init(void)
2002{
d829dc75
CC
2003 cm_wq = create_freezable_workqueue("charger_manager");
2004 INIT_DELAYED_WORK(&cm_monitor_work, cm_monitor_poller);
2005
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2006 return platform_driver_register(&charger_manager_driver);
2007}
2008late_initcall(charger_manager_init);
2009
2010static void __exit charger_manager_cleanup(void)
2011{
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CC
2012 destroy_workqueue(cm_wq);
2013 cm_wq = NULL;
2014
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2015 platform_driver_unregister(&charger_manager_driver);
2016}
2017module_exit(charger_manager_cleanup);
2018
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CC
2019/**
2020 * find_power_supply - find the associated power_supply of charger
2021 * @cm: the Charger Manager representing the battery
2022 * @psy: pointer to instance of charger's power_supply
2023 */
2024static bool find_power_supply(struct charger_manager *cm,
2025 struct power_supply *psy)
2026{
2027 int i;
2028 bool found = false;
2029
cdaf3e15 2030 for (i = 0; cm->desc->psy_charger_stat[i]; i++) {
297d716f 2031 if (!strcmp(psy->desc->name, cm->desc->psy_charger_stat[i])) {
dfeccb12
CC
2032 found = true;
2033 break;
2034 }
2035 }
2036
2037 return found;
2038}
2039
2040/**
2041 * cm_notify_event - charger driver notify Charger Manager of charger event
2042 * @psy: pointer to instance of charger's power_supply
2043 * @type: type of charger event
2044 * @msg: optional message passed to uevent_notify fuction
2045 */
2046void cm_notify_event(struct power_supply *psy, enum cm_event_types type,
2047 char *msg)
2048{
2049 struct charger_manager *cm;
2050 bool found_power_supply = false;
2051
2052 if (psy == NULL)
2053 return;
2054
2055 mutex_lock(&cm_list_mtx);
2056 list_for_each_entry(cm, &cm_list, entry) {
2057 found_power_supply = find_power_supply(cm, psy);
2058 if (found_power_supply)
2059 break;
2060 }
2061 mutex_unlock(&cm_list_mtx);
2062
2063 if (!found_power_supply)
2064 return;
2065
2066 switch (type) {
2067 case CM_EVENT_BATT_FULL:
2068 fullbatt_handler(cm);
2069 break;
2070 case CM_EVENT_BATT_OUT:
2071 battout_handler(cm);
2072 break;
2073 case CM_EVENT_BATT_IN:
2074 case CM_EVENT_EXT_PWR_IN_OUT ... CM_EVENT_CHG_START_STOP:
2075 misc_event_handler(cm, type);
2076 break;
2077 case CM_EVENT_UNKNOWN:
2078 case CM_EVENT_OTHERS:
2079 uevent_notify(cm, msg ? msg : default_event_names[type]);
2080 break;
2081 default:
e5409cbd 2082 dev_err(cm->dev, "%s: type not specified\n", __func__);
dfeccb12
CC
2083 break;
2084 }
2085}
2086EXPORT_SYMBOL_GPL(cm_notify_event);
2087
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2088MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
2089MODULE_DESCRIPTION("Charger Manager");
2090MODULE_LICENSE("GPL");