1c942fddfSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
21da177e4SLinus Torvalds /*
3aa650bbdSAlexey Starikovskiy * battery.c - ACPI Battery Driver (Revision: 2.0)
41da177e4SLinus Torvalds *
5aa650bbdSAlexey Starikovskiy * Copyright (C) 2007 Alexey Starikovskiy <astarikovskiy@suse.de>
6aa650bbdSAlexey Starikovskiy * Copyright (C) 2004-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>
71da177e4SLinus Torvalds * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
81da177e4SLinus Torvalds * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
91da177e4SLinus Torvalds */
101da177e4SLinus Torvalds
11bd8c5d1eSRafael J. Wysocki #define pr_fmt(fmt) "ACPI: battery: " fmt
12fa93854fSOgnjen Galic
1353dd200aSDmitry Rozhkov #include <linux/async.h>
1453dd200aSDmitry Rozhkov #include <linux/delay.h>
1553dd200aSDmitry Rozhkov #include <linux/dmi.h>
1653dd200aSDmitry Rozhkov #include <linux/jiffies.h>
171da177e4SLinus Torvalds #include <linux/kernel.h>
18fa93854fSOgnjen Galic #include <linux/list.h>
191da177e4SLinus Torvalds #include <linux/module.h>
20fa93854fSOgnjen Galic #include <linux/mutex.h>
215a0e3ad6STejun Heo #include <linux/slab.h>
2225be5821SKyle McMartin #include <linux/suspend.h>
2353dd200aSDmitry Rozhkov #include <linux/types.h>
2453dd200aSDmitry Rozhkov
254000e626SKamil Iskra #include <asm/unaligned.h>
26d7380965SAlexey Starikovskiy
278b48463fSLv Zheng #include <linux/acpi.h>
28d7380965SAlexey Starikovskiy #include <linux/power_supply.h>
29d7380965SAlexey Starikovskiy
30fa93854fSOgnjen Galic #include <acpi/battery.h>
31f03be352SAlexander Mezin
321da177e4SLinus Torvalds #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
33cc99f0adSHans de Goede #define ACPI_BATTERY_CAPACITY_VALID(capacity) \
34cc99f0adSHans de Goede ((capacity) != 0 && (capacity) != ACPI_BATTERY_VALUE_UNKNOWN)
351da177e4SLinus Torvalds
361da177e4SLinus Torvalds #define ACPI_BATTERY_DEVICE_NAME "Battery"
371da177e4SLinus Torvalds
38ae6f6187SLan Tianyu /* Battery power unit: 0 means mW, 1 means mA */
39ae6f6187SLan Tianyu #define ACPI_BATTERY_POWER_UNIT_MA 1
40ae6f6187SLan Tianyu
411ac5aaa6SZhang Rui #define ACPI_BATTERY_STATE_DISCHARGING 0x1
421ac5aaa6SZhang Rui #define ACPI_BATTERY_STATE_CHARGING 0x2
431ac5aaa6SZhang Rui #define ACPI_BATTERY_STATE_CRITICAL 0x4
441ac5aaa6SZhang Rui
4591507d25SArmin Wolf #define MAX_STRING_LENGTH 64
4691507d25SArmin Wolf
471da177e4SLinus Torvalds MODULE_AUTHOR("Paul Diefenbaugh");
48aa650bbdSAlexey Starikovskiy MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
497cda93e0SLen Brown MODULE_DESCRIPTION("ACPI Battery Driver");
501da177e4SLinus Torvalds MODULE_LICENSE("GPL");
511da177e4SLinus Torvalds
52eca21d91SLuis Henriques static async_cookie_t async_cookie;
53bc39fbcfSHans de Goede static bool battery_driver_registered;
54a90b4038SLan Tianyu static int battery_bix_broken_package;
55f43691c6SAlexander Mezin static int battery_notification_delay_ms;
561b799c5cSHans de Goede static int battery_ac_is_broken;
57f1d4661aSAlexey Starikovskiy static unsigned int cache_time = 1000;
58f1d4661aSAlexey Starikovskiy module_param(cache_time, uint, 0644);
59f1d4661aSAlexey Starikovskiy MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
60b6ce4083SVladimir Lebedev
61d7380965SAlexey Starikovskiy static const struct acpi_device_id battery_device_ids[] = {
62d7380965SAlexey Starikovskiy {"PNP0C0A", 0},
637dacee0bSMaximilian Luz
647dacee0bSMaximilian Luz /* Microsoft Surface Go 3 */
657dacee0bSMaximilian Luz {"MSHW0146", 0},
667dacee0bSMaximilian Luz
67d7380965SAlexey Starikovskiy {"", 0},
68d7380965SAlexey Starikovskiy };
69d7380965SAlexey Starikovskiy
70d7380965SAlexey Starikovskiy MODULE_DEVICE_TABLE(acpi, battery_device_ids);
71d7380965SAlexey Starikovskiy
727b3bcc4aSAlexey Starikovskiy enum {
737b3bcc4aSAlexey Starikovskiy ACPI_BATTERY_ALARM_PRESENT,
74c67fcd67SAlexey Starikovskiy ACPI_BATTERY_XINFO_PRESENT,
75557d5868SZhang Rui ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY,
764000e626SKamil Iskra /* On Lenovo Thinkpad models from 2010 and 2011, the power unit
7765545abdSXiaofei Tan * switches between mWh and mAh depending on whether the system
7865545abdSXiaofei Tan * is running on battery or not. When mAh is the unit, most
7965545abdSXiaofei Tan * reported values are incorrect and need to be adjusted by
8065545abdSXiaofei Tan * 10000/design_voltage. Verified on x201, t410, t410s, and x220.
8165545abdSXiaofei Tan * Pre-2010 and 2012 models appear to always report in mWh and
8265545abdSXiaofei Tan * are thus unaffected (tested with t42, t61, t500, x200, x300,
8365545abdSXiaofei Tan * and x230). Also, in mid-2012 Lenovo issued a BIOS update for
8465545abdSXiaofei Tan * the 2011 models that fixes the issue (tested on x220 with a
8565545abdSXiaofei Tan * post-1.29 BIOS), but as of Nov. 2012, no such update is
8665545abdSXiaofei Tan * available for the 2010 models.
8765545abdSXiaofei Tan */
884000e626SKamil Iskra ACPI_BATTERY_QUIRK_THINKPAD_MAH,
89a20136a6SLaszlo Toth /* for batteries reporting current capacity with design capacity
90a20136a6SLaszlo Toth * on a full charge, but showing degradation in full charge cap.
91a20136a6SLaszlo Toth */
92a20136a6SLaszlo Toth ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE,
937b3bcc4aSAlexey Starikovskiy };
94d7380965SAlexey Starikovskiy
95038fdea2SAlexey Starikovskiy struct acpi_battery {
96038fdea2SAlexey Starikovskiy struct mutex lock;
9769d94ec6SSergey Senozhatsky struct mutex sysfs_lock;
98297d716fSKrzysztof Kozlowski struct power_supply *bat;
99297d716fSKrzysztof Kozlowski struct power_supply_desc bat_desc;
100f1d4661aSAlexey Starikovskiy struct acpi_device *device;
10125be5821SKyle McMartin struct notifier_block pm_nb;
102fa93854fSOgnjen Galic struct list_head list;
103f1d4661aSAlexey Starikovskiy unsigned long update_time;
104016d5baaSLan Tianyu int revision;
1057faa144aSAlexey Starikovskiy int rate_now;
106d7380965SAlexey Starikovskiy int capacity_now;
107d7380965SAlexey Starikovskiy int voltage_now;
108038fdea2SAlexey Starikovskiy int design_capacity;
109d7380965SAlexey Starikovskiy int full_charge_capacity;
110038fdea2SAlexey Starikovskiy int technology;
111038fdea2SAlexey Starikovskiy int design_voltage;
112038fdea2SAlexey Starikovskiy int design_capacity_warning;
113038fdea2SAlexey Starikovskiy int design_capacity_low;
114c67fcd67SAlexey Starikovskiy int cycle_count;
115c67fcd67SAlexey Starikovskiy int measurement_accuracy;
116c67fcd67SAlexey Starikovskiy int max_sampling_time;
117c67fcd67SAlexey Starikovskiy int min_sampling_time;
118c67fcd67SAlexey Starikovskiy int max_averaging_interval;
119c67fcd67SAlexey Starikovskiy int min_averaging_interval;
120038fdea2SAlexey Starikovskiy int capacity_granularity_1;
121038fdea2SAlexey Starikovskiy int capacity_granularity_2;
122f1d4661aSAlexey Starikovskiy int alarm;
12391507d25SArmin Wolf char model_number[MAX_STRING_LENGTH];
12491507d25SArmin Wolf char serial_number[MAX_STRING_LENGTH];
12591507d25SArmin Wolf char type[MAX_STRING_LENGTH];
12691507d25SArmin Wolf char oem_info[MAX_STRING_LENGTH];
127f1d4661aSAlexey Starikovskiy int state;
128f1d4661aSAlexey Starikovskiy int power_unit;
1297b3bcc4aSAlexey Starikovskiy unsigned long flags;
1301da177e4SLinus Torvalds };
1311da177e4SLinus Torvalds
132297d716fSKrzysztof Kozlowski #define to_acpi_battery(x) power_supply_get_drvdata(x)
133d7380965SAlexey Starikovskiy
acpi_battery_present(struct acpi_battery * battery)134efd941f1SAndy Shevchenko static inline int acpi_battery_present(struct acpi_battery *battery)
13578490d82SAlexey Starikovskiy {
13678490d82SAlexey Starikovskiy return battery->device->status.battery_present;
13778490d82SAlexey Starikovskiy }
138038fdea2SAlexey Starikovskiy
acpi_battery_technology(struct acpi_battery * battery)139d7380965SAlexey Starikovskiy static int acpi_battery_technology(struct acpi_battery *battery)
140d7380965SAlexey Starikovskiy {
141d7380965SAlexey Starikovskiy if (!strcasecmp("NiCd", battery->type))
142d7380965SAlexey Starikovskiy return POWER_SUPPLY_TECHNOLOGY_NiCd;
143d7380965SAlexey Starikovskiy if (!strcasecmp("NiMH", battery->type))
144d7380965SAlexey Starikovskiy return POWER_SUPPLY_TECHNOLOGY_NiMH;
145d7380965SAlexey Starikovskiy if (!strcasecmp("LION", battery->type))
146d7380965SAlexey Starikovskiy return POWER_SUPPLY_TECHNOLOGY_LION;
147ad40e68bSAndrey Borzenkov if (!strncasecmp("LI-ION", battery->type, 6))
1480bde7eeeSAlexey Starikovskiy return POWER_SUPPLY_TECHNOLOGY_LION;
149d7380965SAlexey Starikovskiy if (!strcasecmp("LiP", battery->type))
150d7380965SAlexey Starikovskiy return POWER_SUPPLY_TECHNOLOGY_LIPO;
151d7380965SAlexey Starikovskiy return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
152d7380965SAlexey Starikovskiy }
153d7380965SAlexey Starikovskiy
1549104476eSAlexey Starikovskiy static int acpi_battery_get_state(struct acpi_battery *battery);
155b19073a0SAlexey Starikovskiy
acpi_battery_is_charged(struct acpi_battery * battery)15656f382a0SRichard Hughes static int acpi_battery_is_charged(struct acpi_battery *battery)
15756f382a0SRichard Hughes {
1581ac5aaa6SZhang Rui /* charging, discharging or critical low */
15956f382a0SRichard Hughes if (battery->state != 0)
16056f382a0SRichard Hughes return 0;
16156f382a0SRichard Hughes
16256f382a0SRichard Hughes /* battery not reporting charge */
16356f382a0SRichard Hughes if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN ||
16456f382a0SRichard Hughes battery->capacity_now == 0)
16556f382a0SRichard Hughes return 0;
16656f382a0SRichard Hughes
16756f382a0SRichard Hughes /* good batteries update full_charge as the batteries degrade */
16856f382a0SRichard Hughes if (battery->full_charge_capacity == battery->capacity_now)
16956f382a0SRichard Hughes return 1;
17056f382a0SRichard Hughes
17156f382a0SRichard Hughes /* fallback to using design values for broken batteries */
1722835f327SAndré Almeida if (battery->design_capacity <= battery->capacity_now)
17356f382a0SRichard Hughes return 1;
17456f382a0SRichard Hughes
17556f382a0SRichard Hughes /* we don't do any sort of metric based on percentages */
17656f382a0SRichard Hughes return 0;
17756f382a0SRichard Hughes }
17856f382a0SRichard Hughes
acpi_battery_is_degraded(struct acpi_battery * battery)179a20136a6SLaszlo Toth static bool acpi_battery_is_degraded(struct acpi_battery *battery)
180a20136a6SLaszlo Toth {
181cc99f0adSHans de Goede return ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity) &&
182cc99f0adSHans de Goede ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity) &&
183a20136a6SLaszlo Toth battery->full_charge_capacity < battery->design_capacity;
184a20136a6SLaszlo Toth }
185a20136a6SLaszlo Toth
acpi_battery_handle_discharging(struct acpi_battery * battery)18619fffc84SHans de Goede static int acpi_battery_handle_discharging(struct acpi_battery *battery)
18719fffc84SHans de Goede {
18819fffc84SHans de Goede /*
18919fffc84SHans de Goede * Some devices wrongly report discharging if the battery's charge level
19019fffc84SHans de Goede * was above the device's start charging threshold atm the AC adapter
19119fffc84SHans de Goede * was plugged in and the device thus did not start a new charge cycle.
19219fffc84SHans de Goede */
1931b799c5cSHans de Goede if ((battery_ac_is_broken || power_supply_is_system_supplied()) &&
1941b799c5cSHans de Goede battery->rate_now == 0)
19519fffc84SHans de Goede return POWER_SUPPLY_STATUS_NOT_CHARGING;
19619fffc84SHans de Goede
19719fffc84SHans de Goede return POWER_SUPPLY_STATUS_DISCHARGING;
19819fffc84SHans de Goede }
19919fffc84SHans de Goede
acpi_battery_get_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)200d7380965SAlexey Starikovskiy static int acpi_battery_get_property(struct power_supply *psy,
201d7380965SAlexey Starikovskiy enum power_supply_property psp,
202d7380965SAlexey Starikovskiy union power_supply_propval *val)
203d7380965SAlexey Starikovskiy {
2045b74d1d1SHans de Goede int full_capacity = ACPI_BATTERY_VALUE_UNKNOWN, ret = 0;
205d7380965SAlexey Starikovskiy struct acpi_battery *battery = to_acpi_battery(psy);
206d7380965SAlexey Starikovskiy
2079104476eSAlexey Starikovskiy if (acpi_battery_present(battery)) {
2089104476eSAlexey Starikovskiy /* run battery update only if it is present */
2099104476eSAlexey Starikovskiy acpi_battery_get_state(battery);
2109104476eSAlexey Starikovskiy } else if (psp != POWER_SUPPLY_PROP_PRESENT)
211d7380965SAlexey Starikovskiy return -ENODEV;
212d7380965SAlexey Starikovskiy switch (psp) {
213d7380965SAlexey Starikovskiy case POWER_SUPPLY_PROP_STATUS:
21482bf43b2SDaniel Drake if (battery->state & ACPI_BATTERY_STATE_DISCHARGING)
21519fffc84SHans de Goede val->intval = acpi_battery_handle_discharging(battery);
21682bf43b2SDaniel Drake else if (battery->state & ACPI_BATTERY_STATE_CHARGING)
217d7380965SAlexey Starikovskiy val->intval = POWER_SUPPLY_STATUS_CHARGING;
21856f382a0SRichard Hughes else if (acpi_battery_is_charged(battery))
219d7380965SAlexey Starikovskiy val->intval = POWER_SUPPLY_STATUS_FULL;
2204c41d3adSRoland Dreier else
221185d2069SWerner Sembach val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
222d7380965SAlexey Starikovskiy break;
223d7380965SAlexey Starikovskiy case POWER_SUPPLY_PROP_PRESENT:
224d7380965SAlexey Starikovskiy val->intval = acpi_battery_present(battery);
225d7380965SAlexey Starikovskiy break;
226d7380965SAlexey Starikovskiy case POWER_SUPPLY_PROP_TECHNOLOGY:
227d7380965SAlexey Starikovskiy val->intval = acpi_battery_technology(battery);
228d7380965SAlexey Starikovskiy break;
229c67fcd67SAlexey Starikovskiy case POWER_SUPPLY_PROP_CYCLE_COUNT:
230c67fcd67SAlexey Starikovskiy val->intval = battery->cycle_count;
231c67fcd67SAlexey Starikovskiy break;
232d7380965SAlexey Starikovskiy case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
233a1b4bd69SRafael J. Wysocki if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
234a1b4bd69SRafael J. Wysocki ret = -ENODEV;
235a1b4bd69SRafael J. Wysocki else
236d7380965SAlexey Starikovskiy val->intval = battery->design_voltage * 1000;
237d7380965SAlexey Starikovskiy break;
238d7380965SAlexey Starikovskiy case POWER_SUPPLY_PROP_VOLTAGE_NOW:
239a1b4bd69SRafael J. Wysocki if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
240a1b4bd69SRafael J. Wysocki ret = -ENODEV;
241a1b4bd69SRafael J. Wysocki else
242d7380965SAlexey Starikovskiy val->intval = battery->voltage_now * 1000;
243d7380965SAlexey Starikovskiy break;
244d7380965SAlexey Starikovskiy case POWER_SUPPLY_PROP_CURRENT_NOW:
2457faa144aSAlexey Starikovskiy case POWER_SUPPLY_PROP_POWER_NOW:
246a1b4bd69SRafael J. Wysocki if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN)
247a1b4bd69SRafael J. Wysocki ret = -ENODEV;
248a1b4bd69SRafael J. Wysocki else
2497faa144aSAlexey Starikovskiy val->intval = battery->rate_now * 1000;
250d7380965SAlexey Starikovskiy break;
251d7380965SAlexey Starikovskiy case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
252d7380965SAlexey Starikovskiy case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
253cc99f0adSHans de Goede if (!ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity))
254a1b4bd69SRafael J. Wysocki ret = -ENODEV;
255a1b4bd69SRafael J. Wysocki else
256d7380965SAlexey Starikovskiy val->intval = battery->design_capacity * 1000;
257d7380965SAlexey Starikovskiy break;
258d7380965SAlexey Starikovskiy case POWER_SUPPLY_PROP_CHARGE_FULL:
259d7380965SAlexey Starikovskiy case POWER_SUPPLY_PROP_ENERGY_FULL:
260cc99f0adSHans de Goede if (!ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity))
261a1b4bd69SRafael J. Wysocki ret = -ENODEV;
262a1b4bd69SRafael J. Wysocki else
263d7380965SAlexey Starikovskiy val->intval = battery->full_charge_capacity * 1000;
264d7380965SAlexey Starikovskiy break;
265d7380965SAlexey Starikovskiy case POWER_SUPPLY_PROP_CHARGE_NOW:
266d7380965SAlexey Starikovskiy case POWER_SUPPLY_PROP_ENERGY_NOW:
267a1b4bd69SRafael J. Wysocki if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
268a1b4bd69SRafael J. Wysocki ret = -ENODEV;
269a1b4bd69SRafael J. Wysocki else
270d7380965SAlexey Starikovskiy val->intval = battery->capacity_now * 1000;
271d7380965SAlexey Starikovskiy break;
272a58e1150Ssrinivas pandruvada case POWER_SUPPLY_PROP_CAPACITY:
2735b74d1d1SHans de Goede if (ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity))
2745b74d1d1SHans de Goede full_capacity = battery->full_charge_capacity;
2755b74d1d1SHans de Goede else if (ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity))
2765b74d1d1SHans de Goede full_capacity = battery->design_capacity;
2775b74d1d1SHans de Goede
278cc99f0adSHans de Goede if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN ||
2795b74d1d1SHans de Goede full_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
280cc99f0adSHans de Goede ret = -ENODEV;
281cc99f0adSHans de Goede else
282a58e1150Ssrinivas pandruvada val->intval = battery->capacity_now * 100/
2835b74d1d1SHans de Goede full_capacity;
284a58e1150Ssrinivas pandruvada break;
2851ac5aaa6SZhang Rui case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
2861ac5aaa6SZhang Rui if (battery->state & ACPI_BATTERY_STATE_CRITICAL)
2871ac5aaa6SZhang Rui val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
2881ac5aaa6SZhang Rui else if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) &&
2891ac5aaa6SZhang Rui (battery->capacity_now <= battery->alarm))
2901ac5aaa6SZhang Rui val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
2911ac5aaa6SZhang Rui else if (acpi_battery_is_charged(battery))
2921ac5aaa6SZhang Rui val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
2931ac5aaa6SZhang Rui else
2941ac5aaa6SZhang Rui val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
2951ac5aaa6SZhang Rui break;
296d7380965SAlexey Starikovskiy case POWER_SUPPLY_PROP_MODEL_NAME:
297d7380965SAlexey Starikovskiy val->strval = battery->model_number;
298d7380965SAlexey Starikovskiy break;
299d7380965SAlexey Starikovskiy case POWER_SUPPLY_PROP_MANUFACTURER:
300d7380965SAlexey Starikovskiy val->strval = battery->oem_info;
301d7380965SAlexey Starikovskiy break;
3027c2670bbSmaximilian attems case POWER_SUPPLY_PROP_SERIAL_NUMBER:
3037c2670bbSmaximilian attems val->strval = battery->serial_number;
3047c2670bbSmaximilian attems break;
305d7380965SAlexey Starikovskiy default:
306a1b4bd69SRafael J. Wysocki ret = -EINVAL;
307d7380965SAlexey Starikovskiy }
308a1b4bd69SRafael J. Wysocki return ret;
309d7380965SAlexey Starikovskiy }
310d7380965SAlexey Starikovskiy
311d7380965SAlexey Starikovskiy static enum power_supply_property charge_battery_props[] = {
312d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_STATUS,
313d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_PRESENT,
314d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_TECHNOLOGY,
315c67fcd67SAlexey Starikovskiy POWER_SUPPLY_PROP_CYCLE_COUNT,
316d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
317d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_VOLTAGE_NOW,
318d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_CURRENT_NOW,
319d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
320d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_CHARGE_FULL,
321d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_CHARGE_NOW,
322a58e1150Ssrinivas pandruvada POWER_SUPPLY_PROP_CAPACITY,
3231ac5aaa6SZhang Rui POWER_SUPPLY_PROP_CAPACITY_LEVEL,
324d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_MODEL_NAME,
325d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_MANUFACTURER,
3267c2670bbSmaximilian attems POWER_SUPPLY_PROP_SERIAL_NUMBER,
327d7380965SAlexey Starikovskiy };
328d7380965SAlexey Starikovskiy
329ff3154d1SHans de Goede static enum power_supply_property charge_battery_full_cap_broken_props[] = {
330ff3154d1SHans de Goede POWER_SUPPLY_PROP_STATUS,
331ff3154d1SHans de Goede POWER_SUPPLY_PROP_PRESENT,
332ff3154d1SHans de Goede POWER_SUPPLY_PROP_TECHNOLOGY,
333ff3154d1SHans de Goede POWER_SUPPLY_PROP_CYCLE_COUNT,
334ff3154d1SHans de Goede POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
335ff3154d1SHans de Goede POWER_SUPPLY_PROP_VOLTAGE_NOW,
336ff3154d1SHans de Goede POWER_SUPPLY_PROP_CURRENT_NOW,
337ff3154d1SHans de Goede POWER_SUPPLY_PROP_CHARGE_NOW,
338ff3154d1SHans de Goede POWER_SUPPLY_PROP_MODEL_NAME,
339ff3154d1SHans de Goede POWER_SUPPLY_PROP_MANUFACTURER,
340ff3154d1SHans de Goede POWER_SUPPLY_PROP_SERIAL_NUMBER,
341ff3154d1SHans de Goede };
342ff3154d1SHans de Goede
343d7380965SAlexey Starikovskiy static enum power_supply_property energy_battery_props[] = {
344d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_STATUS,
345d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_PRESENT,
346d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_TECHNOLOGY,
347c67fcd67SAlexey Starikovskiy POWER_SUPPLY_PROP_CYCLE_COUNT,
348d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
349d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_VOLTAGE_NOW,
3507faa144aSAlexey Starikovskiy POWER_SUPPLY_PROP_POWER_NOW,
351d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
352d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_ENERGY_FULL,
353d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_ENERGY_NOW,
354a58e1150Ssrinivas pandruvada POWER_SUPPLY_PROP_CAPACITY,
3551ac5aaa6SZhang Rui POWER_SUPPLY_PROP_CAPACITY_LEVEL,
356d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_MODEL_NAME,
357d7380965SAlexey Starikovskiy POWER_SUPPLY_PROP_MANUFACTURER,
3587c2670bbSmaximilian attems POWER_SUPPLY_PROP_SERIAL_NUMBER,
359d7380965SAlexey Starikovskiy };
360d7380965SAlexey Starikovskiy
361b41901a2SHans de Goede static enum power_supply_property energy_battery_full_cap_broken_props[] = {
362b41901a2SHans de Goede POWER_SUPPLY_PROP_STATUS,
363b41901a2SHans de Goede POWER_SUPPLY_PROP_PRESENT,
364b41901a2SHans de Goede POWER_SUPPLY_PROP_TECHNOLOGY,
365b41901a2SHans de Goede POWER_SUPPLY_PROP_CYCLE_COUNT,
366b41901a2SHans de Goede POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
367b41901a2SHans de Goede POWER_SUPPLY_PROP_VOLTAGE_NOW,
368b41901a2SHans de Goede POWER_SUPPLY_PROP_POWER_NOW,
369b41901a2SHans de Goede POWER_SUPPLY_PROP_ENERGY_NOW,
370b41901a2SHans de Goede POWER_SUPPLY_PROP_MODEL_NAME,
371b41901a2SHans de Goede POWER_SUPPLY_PROP_MANUFACTURER,
372b41901a2SHans de Goede POWER_SUPPLY_PROP_SERIAL_NUMBER,
373b41901a2SHans de Goede };
374b41901a2SHans de Goede
37565545abdSXiaofei Tan /* Battery Management */
376038fdea2SAlexey Starikovskiy struct acpi_offsets {
377038fdea2SAlexey Starikovskiy size_t offset; /* offset inside struct acpi_sbs_battery */
378038fdea2SAlexey Starikovskiy u8 mode; /* int or string? */
379038fdea2SAlexey Starikovskiy };
380038fdea2SAlexey Starikovskiy
381a4658784SMathias Krause static const struct acpi_offsets state_offsets[] = {
382038fdea2SAlexey Starikovskiy {offsetof(struct acpi_battery, state), 0},
3837faa144aSAlexey Starikovskiy {offsetof(struct acpi_battery, rate_now), 0},
384d7380965SAlexey Starikovskiy {offsetof(struct acpi_battery, capacity_now), 0},
385d7380965SAlexey Starikovskiy {offsetof(struct acpi_battery, voltage_now), 0},
386038fdea2SAlexey Starikovskiy };
387038fdea2SAlexey Starikovskiy
388a4658784SMathias Krause static const struct acpi_offsets info_offsets[] = {
389038fdea2SAlexey Starikovskiy {offsetof(struct acpi_battery, power_unit), 0},
390038fdea2SAlexey Starikovskiy {offsetof(struct acpi_battery, design_capacity), 0},
391d7380965SAlexey Starikovskiy {offsetof(struct acpi_battery, full_charge_capacity), 0},
392038fdea2SAlexey Starikovskiy {offsetof(struct acpi_battery, technology), 0},
393038fdea2SAlexey Starikovskiy {offsetof(struct acpi_battery, design_voltage), 0},
394038fdea2SAlexey Starikovskiy {offsetof(struct acpi_battery, design_capacity_warning), 0},
395038fdea2SAlexey Starikovskiy {offsetof(struct acpi_battery, design_capacity_low), 0},
396038fdea2SAlexey Starikovskiy {offsetof(struct acpi_battery, capacity_granularity_1), 0},
397038fdea2SAlexey Starikovskiy {offsetof(struct acpi_battery, capacity_granularity_2), 0},
398038fdea2SAlexey Starikovskiy {offsetof(struct acpi_battery, model_number), 1},
399038fdea2SAlexey Starikovskiy {offsetof(struct acpi_battery, serial_number), 1},
400038fdea2SAlexey Starikovskiy {offsetof(struct acpi_battery, type), 1},
401038fdea2SAlexey Starikovskiy {offsetof(struct acpi_battery, oem_info), 1},
402038fdea2SAlexey Starikovskiy };
403038fdea2SAlexey Starikovskiy
404a4658784SMathias Krause static const struct acpi_offsets extended_info_offsets[] = {
405016d5baaSLan Tianyu {offsetof(struct acpi_battery, revision), 0},
406c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, power_unit), 0},
407c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, design_capacity), 0},
408c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, full_charge_capacity), 0},
409c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, technology), 0},
410c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, design_voltage), 0},
411c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, design_capacity_warning), 0},
412c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, design_capacity_low), 0},
413c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, cycle_count), 0},
414c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, measurement_accuracy), 0},
415c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, max_sampling_time), 0},
416c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, min_sampling_time), 0},
417c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, max_averaging_interval), 0},
418c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, min_averaging_interval), 0},
419c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, capacity_granularity_1), 0},
420c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, capacity_granularity_2), 0},
421c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, model_number), 1},
422c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, serial_number), 1},
423c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, type), 1},
424c67fcd67SAlexey Starikovskiy {offsetof(struct acpi_battery, oem_info), 1},
425c67fcd67SAlexey Starikovskiy };
426c67fcd67SAlexey Starikovskiy
extract_package(struct acpi_battery * battery,union acpi_object * package,const struct acpi_offsets * offsets,int num)427038fdea2SAlexey Starikovskiy static int extract_package(struct acpi_battery *battery,
428b6ce4083SVladimir Lebedev union acpi_object *package,
429a4658784SMathias Krause const struct acpi_offsets *offsets, int num)
430b6ce4083SVladimir Lebedev {
431106449e8SAlexey Starikovskiy int i;
432038fdea2SAlexey Starikovskiy union acpi_object *element;
43365545abdSXiaofei Tan
434038fdea2SAlexey Starikovskiy if (package->type != ACPI_TYPE_PACKAGE)
435038fdea2SAlexey Starikovskiy return -EFAULT;
436038fdea2SAlexey Starikovskiy for (i = 0; i < num; ++i) {
437038fdea2SAlexey Starikovskiy if (package->package.count <= i)
438038fdea2SAlexey Starikovskiy return -EFAULT;
439038fdea2SAlexey Starikovskiy element = &package->package.elements[i];
440038fdea2SAlexey Starikovskiy if (offsets[i].mode) {
441106449e8SAlexey Starikovskiy u8 *ptr = (u8 *)battery + offsets[i].offset;
44291507d25SArmin Wolf u32 len = MAX_STRING_LENGTH;
44365545abdSXiaofei Tan
444a1a32dedSArmin Wolf switch (element->type) {
445a1a32dedSArmin Wolf case ACPI_TYPE_BUFFER:
446a1a32dedSArmin Wolf if (len > element->buffer.length + 1)
447a1a32dedSArmin Wolf len = element->buffer.length + 1;
448a1a32dedSArmin Wolf
449a1a32dedSArmin Wolf fallthrough;
450a1a32dedSArmin Wolf case ACPI_TYPE_STRING:
451a1a32dedSArmin Wolf strscpy(ptr, element->string.pointer, len);
452a1a32dedSArmin Wolf
453a1a32dedSArmin Wolf break;
454a1a32dedSArmin Wolf case ACPI_TYPE_INTEGER:
455a1a32dedSArmin Wolf strscpy(ptr, (u8 *)&element->integer.value, sizeof(u64) + 1);
456a1a32dedSArmin Wolf
457a1a32dedSArmin Wolf break;
458a1a32dedSArmin Wolf default:
459b8a1bdb1SAlexey Starikovskiy *ptr = 0; /* don't have value */
460a1a32dedSArmin Wolf }
461038fdea2SAlexey Starikovskiy } else {
462b8a1bdb1SAlexey Starikovskiy int *x = (int *)((u8 *)battery + offsets[i].offset);
463b8a1bdb1SAlexey Starikovskiy *x = (element->type == ACPI_TYPE_INTEGER) ?
464b8a1bdb1SAlexey Starikovskiy element->integer.value : -1;
465b6ce4083SVladimir Lebedev }
466b6ce4083SVladimir Lebedev }
467b6ce4083SVladimir Lebedev return 0;
468b6ce4083SVladimir Lebedev }
469b6ce4083SVladimir Lebedev
acpi_battery_get_status(struct acpi_battery * battery)470b6ce4083SVladimir Lebedev static int acpi_battery_get_status(struct acpi_battery *battery)
471b6ce4083SVladimir Lebedev {
472aa650bbdSAlexey Starikovskiy if (acpi_bus_get_status(battery->device)) {
473bd8c5d1eSRafael J. Wysocki acpi_handle_info(battery->device->handle,
474bd8c5d1eSRafael J. Wysocki "_STA evaluation failed\n");
475b6ce4083SVladimir Lebedev return -ENODEV;
476b6ce4083SVladimir Lebedev }
477aa650bbdSAlexey Starikovskiy return 0;
478b6ce4083SVladimir Lebedev }
479b6ce4083SVladimir Lebedev
4802d09af4aSDave Lambley
extract_battery_info(const int use_bix,struct acpi_battery * battery,const struct acpi_buffer * buffer)4812d09af4aSDave Lambley static int extract_battery_info(const int use_bix,
4822d09af4aSDave Lambley struct acpi_battery *battery,
4832d09af4aSDave Lambley const struct acpi_buffer *buffer)
4841da177e4SLinus Torvalds {
485aa650bbdSAlexey Starikovskiy int result = -EFAULT;
486c67fcd67SAlexey Starikovskiy
4872d09af4aSDave Lambley if (use_bix && battery_bix_broken_package)
4882d09af4aSDave Lambley result = extract_package(battery, buffer->pointer,
489a90b4038SLan Tianyu extended_info_offsets + 1,
490a90b4038SLan Tianyu ARRAY_SIZE(extended_info_offsets) - 1);
4912d09af4aSDave Lambley else if (use_bix)
4922d09af4aSDave Lambley result = extract_package(battery, buffer->pointer,
493c67fcd67SAlexey Starikovskiy extended_info_offsets,
494c67fcd67SAlexey Starikovskiy ARRAY_SIZE(extended_info_offsets));
495c67fcd67SAlexey Starikovskiy else
4962d09af4aSDave Lambley result = extract_package(battery, buffer->pointer,
497038fdea2SAlexey Starikovskiy info_offsets, ARRAY_SIZE(info_offsets));
498557d5868SZhang Rui if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
499557d5868SZhang Rui battery->full_charge_capacity = battery->design_capacity;
5004000e626SKamil Iskra if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) &&
5014000e626SKamil Iskra battery->power_unit && battery->design_voltage) {
5024000e626SKamil Iskra battery->design_capacity = battery->design_capacity *
5034000e626SKamil Iskra 10000 / battery->design_voltage;
5044000e626SKamil Iskra battery->full_charge_capacity = battery->full_charge_capacity *
5054000e626SKamil Iskra 10000 / battery->design_voltage;
5064000e626SKamil Iskra battery->design_capacity_warning =
5074000e626SKamil Iskra battery->design_capacity_warning *
5084000e626SKamil Iskra 10000 / battery->design_voltage;
5094000e626SKamil Iskra /* Curiously, design_capacity_low, unlike the rest of them,
51065545abdSXiaofei Tan * is correct.
51165545abdSXiaofei Tan */
5124000e626SKamil Iskra /* capacity_granularity_* equal 1 on the systems tested, so
51365545abdSXiaofei Tan * it's impossible to tell if they would need an adjustment
51465545abdSXiaofei Tan * or not if their values were higher.
51565545abdSXiaofei Tan */
5164000e626SKamil Iskra }
517a20136a6SLaszlo Toth if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags) &&
518a20136a6SLaszlo Toth battery->capacity_now > battery->full_charge_capacity)
519a20136a6SLaszlo Toth battery->capacity_now = battery->full_charge_capacity;
520a20136a6SLaszlo Toth
521d550d98dSPatrick Mochel return result;
5221da177e4SLinus Torvalds }
5231da177e4SLinus Torvalds
acpi_battery_get_info(struct acpi_battery * battery)5242d09af4aSDave Lambley static int acpi_battery_get_info(struct acpi_battery *battery)
5252d09af4aSDave Lambley {
5262d09af4aSDave Lambley const int xinfo = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
5272d09af4aSDave Lambley int use_bix;
5282d09af4aSDave Lambley int result = -ENODEV;
5292d09af4aSDave Lambley
5302d09af4aSDave Lambley if (!acpi_battery_present(battery))
5312d09af4aSDave Lambley return 0;
5322d09af4aSDave Lambley
5332d09af4aSDave Lambley
5342d09af4aSDave Lambley for (use_bix = xinfo ? 1 : 0; use_bix >= 0; use_bix--) {
5352d09af4aSDave Lambley struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
5362d09af4aSDave Lambley acpi_status status = AE_ERROR;
5372d09af4aSDave Lambley
5382d09af4aSDave Lambley mutex_lock(&battery->lock);
5392d09af4aSDave Lambley status = acpi_evaluate_object(battery->device->handle,
5402d09af4aSDave Lambley use_bix ? "_BIX":"_BIF",
5412d09af4aSDave Lambley NULL, &buffer);
5422d09af4aSDave Lambley mutex_unlock(&battery->lock);
5432d09af4aSDave Lambley
5442d09af4aSDave Lambley if (ACPI_FAILURE(status)) {
545bd8c5d1eSRafael J. Wysocki acpi_handle_info(battery->device->handle,
546bd8c5d1eSRafael J. Wysocki "%s evaluation failed: %s\n",
547bd8c5d1eSRafael J. Wysocki use_bix ? "_BIX":"_BIF",
548bd8c5d1eSRafael J. Wysocki acpi_format_exception(status));
5492d09af4aSDave Lambley } else {
5502d09af4aSDave Lambley result = extract_battery_info(use_bix,
5512d09af4aSDave Lambley battery,
5522d09af4aSDave Lambley &buffer);
5532d09af4aSDave Lambley
5542d09af4aSDave Lambley kfree(buffer.pointer);
5552d09af4aSDave Lambley break;
5562d09af4aSDave Lambley }
5572d09af4aSDave Lambley }
5582d09af4aSDave Lambley
5592d09af4aSDave Lambley if (!result && !use_bix && xinfo)
5602d09af4aSDave Lambley pr_warn(FW_BUG "The _BIX method is broken, using _BIF.\n");
5612d09af4aSDave Lambley
5622d09af4aSDave Lambley return result;
5632d09af4aSDave Lambley }
5642d09af4aSDave Lambley
acpi_battery_get_state(struct acpi_battery * battery)565b6ce4083SVladimir Lebedev static int acpi_battery_get_state(struct acpi_battery *battery)
5661da177e4SLinus Torvalds {
5671da177e4SLinus Torvalds int result = 0;
5681da177e4SLinus Torvalds acpi_status status = 0;
5691da177e4SLinus Torvalds struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
5701da177e4SLinus Torvalds
571b6ce4083SVladimir Lebedev if (!acpi_battery_present(battery))
572b6ce4083SVladimir Lebedev return 0;
5731da177e4SLinus Torvalds
574f1d4661aSAlexey Starikovskiy if (battery->update_time &&
575f1d4661aSAlexey Starikovskiy time_before(jiffies, battery->update_time +
576f1d4661aSAlexey Starikovskiy msecs_to_jiffies(cache_time)))
577f1d4661aSAlexey Starikovskiy return 0;
578f1d4661aSAlexey Starikovskiy
579038fdea2SAlexey Starikovskiy mutex_lock(&battery->lock);
580f1d4661aSAlexey Starikovskiy status = acpi_evaluate_object(battery->device->handle, "_BST",
581038fdea2SAlexey Starikovskiy NULL, &buffer);
582038fdea2SAlexey Starikovskiy mutex_unlock(&battery->lock);
5835b31d895SLen Brown
5841da177e4SLinus Torvalds if (ACPI_FAILURE(status)) {
585bd8c5d1eSRafael J. Wysocki acpi_handle_info(battery->device->handle,
586bd8c5d1eSRafael J. Wysocki "_BST evaluation failed: %s",
587bd8c5d1eSRafael J. Wysocki acpi_format_exception(status));
588d550d98dSPatrick Mochel return -ENODEV;
5891da177e4SLinus Torvalds }
590aa650bbdSAlexey Starikovskiy
591038fdea2SAlexey Starikovskiy result = extract_package(battery, buffer.pointer,
592038fdea2SAlexey Starikovskiy state_offsets, ARRAY_SIZE(state_offsets));
593f1d4661aSAlexey Starikovskiy battery->update_time = jiffies;
59402438d87SLen Brown kfree(buffer.pointer);
595bc76f90bSHector Martin
59655003b21SLan Tianyu /* For buggy DSDTs that report negative 16-bit values for either
59755003b21SLan Tianyu * charging or discharging current and/or report 0 as 65536
59855003b21SLan Tianyu * due to bad math.
59955003b21SLan Tianyu */
60055003b21SLan Tianyu if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA &&
60155003b21SLan Tianyu battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN &&
60255003b21SLan Tianyu (s16)(battery->rate_now) < 0) {
603bc76f90bSHector Martin battery->rate_now = abs((s16)battery->rate_now);
604bd8c5d1eSRafael J. Wysocki pr_warn_once(FW_BUG "(dis)charge rate invalid.\n");
60555003b21SLan Tianyu }
606bc76f90bSHector Martin
607557d5868SZhang Rui if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)
608557d5868SZhang Rui && battery->capacity_now >= 0 && battery->capacity_now <= 100)
609557d5868SZhang Rui battery->capacity_now = (battery->capacity_now *
610557d5868SZhang Rui battery->full_charge_capacity) / 100;
6114000e626SKamil Iskra if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) &&
6124000e626SKamil Iskra battery->power_unit && battery->design_voltage) {
6134000e626SKamil Iskra battery->capacity_now = battery->capacity_now *
6144000e626SKamil Iskra 10000 / battery->design_voltage;
6154000e626SKamil Iskra }
616a20136a6SLaszlo Toth if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags) &&
617a20136a6SLaszlo Toth battery->capacity_now > battery->full_charge_capacity)
618a20136a6SLaszlo Toth battery->capacity_now = battery->full_charge_capacity;
619a20136a6SLaszlo Toth
620d550d98dSPatrick Mochel return result;
6211da177e4SLinus Torvalds }
6221da177e4SLinus Torvalds
acpi_battery_set_alarm(struct acpi_battery * battery)623aa650bbdSAlexey Starikovskiy static int acpi_battery_set_alarm(struct acpi_battery *battery)
6241da177e4SLinus Torvalds {
6251da177e4SLinus Torvalds acpi_status status = 0;
6261da177e4SLinus Torvalds
6277b3bcc4aSAlexey Starikovskiy if (!acpi_battery_present(battery) ||
6287b3bcc4aSAlexey Starikovskiy !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags))
629b6ce4083SVladimir Lebedev return -ENODEV;
6301da177e4SLinus Torvalds
631038fdea2SAlexey Starikovskiy mutex_lock(&battery->lock);
6320db98202SJiang Liu status = acpi_execute_simple_method(battery->device->handle, "_BTP",
6330db98202SJiang Liu battery->alarm);
634038fdea2SAlexey Starikovskiy mutex_unlock(&battery->lock);
635aa650bbdSAlexey Starikovskiy
6361da177e4SLinus Torvalds if (ACPI_FAILURE(status))
637d550d98dSPatrick Mochel return -ENODEV;
6381da177e4SLinus Torvalds
639bd8c5d1eSRafael J. Wysocki acpi_handle_debug(battery->device->handle, "Alarm set to %d\n",
640bd8c5d1eSRafael J. Wysocki battery->alarm);
641bd8c5d1eSRafael J. Wysocki
642d550d98dSPatrick Mochel return 0;
6431da177e4SLinus Torvalds }
6441da177e4SLinus Torvalds
acpi_battery_init_alarm(struct acpi_battery * battery)645b6ce4083SVladimir Lebedev static int acpi_battery_init_alarm(struct acpi_battery *battery)
6461da177e4SLinus Torvalds {
6471da177e4SLinus Torvalds /* See if alarms are supported, and if so, set default */
648952c63e9SJiang Liu if (!acpi_has_method(battery->device->handle, "_BTP")) {
6497b3bcc4aSAlexey Starikovskiy clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags);
650f1d4661aSAlexey Starikovskiy return 0;
651f1d4661aSAlexey Starikovskiy }
6527b3bcc4aSAlexey Starikovskiy set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags);
653f1d4661aSAlexey Starikovskiy if (!battery->alarm)
654f1d4661aSAlexey Starikovskiy battery->alarm = battery->design_capacity_warning;
655aa650bbdSAlexey Starikovskiy return acpi_battery_set_alarm(battery);
6561da177e4SLinus Torvalds }
6571da177e4SLinus Torvalds
acpi_battery_alarm_show(struct device * dev,struct device_attribute * attr,char * buf)658508df92dSAndrey Borzenkov static ssize_t acpi_battery_alarm_show(struct device *dev,
659508df92dSAndrey Borzenkov struct device_attribute *attr,
660508df92dSAndrey Borzenkov char *buf)
6614bd35cdbSVladimir Lebedev {
662508df92dSAndrey Borzenkov struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
66365545abdSXiaofei Tan
664508df92dSAndrey Borzenkov return sprintf(buf, "%d\n", battery->alarm * 1000);
665508df92dSAndrey Borzenkov }
666508df92dSAndrey Borzenkov
acpi_battery_alarm_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)667508df92dSAndrey Borzenkov static ssize_t acpi_battery_alarm_store(struct device *dev,
668508df92dSAndrey Borzenkov struct device_attribute *attr,
669508df92dSAndrey Borzenkov const char *buf, size_t count)
670508df92dSAndrey Borzenkov {
671508df92dSAndrey Borzenkov unsigned long x;
672508df92dSAndrey Borzenkov struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
67365545abdSXiaofei Tan
67447a08c85SLuis G.F if (sscanf(buf, "%lu\n", &x) == 1)
675508df92dSAndrey Borzenkov battery->alarm = x/1000;
676508df92dSAndrey Borzenkov if (acpi_battery_present(battery))
677508df92dSAndrey Borzenkov acpi_battery_set_alarm(battery);
678508df92dSAndrey Borzenkov return count;
679508df92dSAndrey Borzenkov }
680508df92dSAndrey Borzenkov
68182d2b610SBhumika Goyal static const struct device_attribute alarm_attr = {
68201e8ef11SParag Warudkar .attr = {.name = "alarm", .mode = 0644},
683508df92dSAndrey Borzenkov .show = acpi_battery_alarm_show,
684508df92dSAndrey Borzenkov .store = acpi_battery_alarm_store,
685508df92dSAndrey Borzenkov };
686508df92dSAndrey Borzenkov
687fa93854fSOgnjen Galic /*
688fa93854fSOgnjen Galic * The Battery Hooking API
689fa93854fSOgnjen Galic *
690fa93854fSOgnjen Galic * This API is used inside other drivers that need to expose
691fa93854fSOgnjen Galic * platform-specific behaviour within the generic driver in a
692fa93854fSOgnjen Galic * generic way.
693fa93854fSOgnjen Galic *
694fa93854fSOgnjen Galic */
695fa93854fSOgnjen Galic
696fa93854fSOgnjen Galic static LIST_HEAD(acpi_battery_list);
697fa93854fSOgnjen Galic static LIST_HEAD(battery_hook_list);
698fa93854fSOgnjen Galic static DEFINE_MUTEX(hook_mutex);
699fa93854fSOgnjen Galic
__battery_hook_unregister(struct acpi_battery_hook * hook,int lock)700514bcc5dSColin Ian King static void __battery_hook_unregister(struct acpi_battery_hook *hook, int lock)
701fa93854fSOgnjen Galic {
702fa93854fSOgnjen Galic struct acpi_battery *battery;
703fa93854fSOgnjen Galic /*
704fa93854fSOgnjen Galic * In order to remove a hook, we first need to
705fa93854fSOgnjen Galic * de-register all the batteries that are registered.
706fa93854fSOgnjen Galic */
707fa93854fSOgnjen Galic if (lock)
708fa93854fSOgnjen Galic mutex_lock(&hook_mutex);
709fa93854fSOgnjen Galic list_for_each_entry(battery, &acpi_battery_list, list) {
710456ed864SLinus Torvalds if (!hook->remove_battery(battery->bat, hook))
71198b0cf20SArmin Wolf power_supply_changed(battery->bat);
712fa93854fSOgnjen Galic }
713fa93854fSOgnjen Galic list_del(&hook->list);
714fa93854fSOgnjen Galic if (lock)
715fa93854fSOgnjen Galic mutex_unlock(&hook_mutex);
716fa93854fSOgnjen Galic pr_info("extension unregistered: %s\n", hook->name);
717fa93854fSOgnjen Galic }
718fa93854fSOgnjen Galic
battery_hook_unregister(struct acpi_battery_hook * hook)719fa93854fSOgnjen Galic void battery_hook_unregister(struct acpi_battery_hook *hook)
720fa93854fSOgnjen Galic {
721fa93854fSOgnjen Galic __battery_hook_unregister(hook, 1);
722fa93854fSOgnjen Galic }
723fa93854fSOgnjen Galic EXPORT_SYMBOL_GPL(battery_hook_unregister);
724fa93854fSOgnjen Galic
battery_hook_register(struct acpi_battery_hook * hook)725fa93854fSOgnjen Galic void battery_hook_register(struct acpi_battery_hook *hook)
726fa93854fSOgnjen Galic {
727fa93854fSOgnjen Galic struct acpi_battery *battery;
728fa93854fSOgnjen Galic
729fa93854fSOgnjen Galic mutex_lock(&hook_mutex);
730fa93854fSOgnjen Galic INIT_LIST_HEAD(&hook->list);
731fa93854fSOgnjen Galic list_add(&hook->list, &battery_hook_list);
732fa93854fSOgnjen Galic /*
733fa93854fSOgnjen Galic * Now that the driver is registered, we need
734fa93854fSOgnjen Galic * to notify the hook that a battery is available
735fa93854fSOgnjen Galic * for each battery, so that the driver may add
736fa93854fSOgnjen Galic * its attributes.
737fa93854fSOgnjen Galic */
738fa93854fSOgnjen Galic list_for_each_entry(battery, &acpi_battery_list, list) {
739878a82c2SArmin Wolf if (hook->add_battery(battery->bat, hook)) {
740fa93854fSOgnjen Galic /*
741fa93854fSOgnjen Galic * If a add-battery returns non-zero,
742fa93854fSOgnjen Galic * the registration of the extension has failed,
743fa93854fSOgnjen Galic * and we will not add it to the list of loaded
744fa93854fSOgnjen Galic * hooks.
745fa93854fSOgnjen Galic */
746fa93854fSOgnjen Galic pr_err("extension failed to load: %s", hook->name);
747fa93854fSOgnjen Galic __battery_hook_unregister(hook, 0);
748673b4271SJouke Witteveen goto end;
749fa93854fSOgnjen Galic }
75098b0cf20SArmin Wolf
75198b0cf20SArmin Wolf power_supply_changed(battery->bat);
752fa93854fSOgnjen Galic }
753fa93854fSOgnjen Galic pr_info("new extension: %s\n", hook->name);
754673b4271SJouke Witteveen end:
755fa93854fSOgnjen Galic mutex_unlock(&hook_mutex);
756fa93854fSOgnjen Galic }
757fa93854fSOgnjen Galic EXPORT_SYMBOL_GPL(battery_hook_register);
758fa93854fSOgnjen Galic
759fa93854fSOgnjen Galic /*
760fa93854fSOgnjen Galic * This function gets called right after the battery sysfs
761fa93854fSOgnjen Galic * attributes have been added, so that the drivers that
762fa93854fSOgnjen Galic * define custom sysfs attributes can add their own.
763fa93854fSOgnjen Galic */
battery_hook_add_battery(struct acpi_battery * battery)764fa93854fSOgnjen Galic static void battery_hook_add_battery(struct acpi_battery *battery)
765fa93854fSOgnjen Galic {
766673b4271SJouke Witteveen struct acpi_battery_hook *hook_node, *tmp;
767fa93854fSOgnjen Galic
768fa93854fSOgnjen Galic mutex_lock(&hook_mutex);
769fa93854fSOgnjen Galic INIT_LIST_HEAD(&battery->list);
770fa93854fSOgnjen Galic list_add(&battery->list, &acpi_battery_list);
771fa93854fSOgnjen Galic /*
772fa93854fSOgnjen Galic * Since we added a new battery to the list, we need to
773fa93854fSOgnjen Galic * iterate over the hooks and call add_battery for each
774fa93854fSOgnjen Galic * hook that was registered. This usually happens
775fa93854fSOgnjen Galic * when a battery gets hotplugged or initialized
776fa93854fSOgnjen Galic * during the battery module initialization.
777fa93854fSOgnjen Galic */
778673b4271SJouke Witteveen list_for_each_entry_safe(hook_node, tmp, &battery_hook_list, list) {
779878a82c2SArmin Wolf if (hook_node->add_battery(battery->bat, hook_node)) {
780fa93854fSOgnjen Galic /*
781fa93854fSOgnjen Galic * The notification of the extensions has failed, to
782fa93854fSOgnjen Galic * prevent further errors we will unload the extension.
783fa93854fSOgnjen Galic */
784fa93854fSOgnjen Galic pr_err("error in extension, unloading: %s",
785fa93854fSOgnjen Galic hook_node->name);
786673b4271SJouke Witteveen __battery_hook_unregister(hook_node, 0);
787fa93854fSOgnjen Galic }
788fa93854fSOgnjen Galic }
789fa93854fSOgnjen Galic mutex_unlock(&hook_mutex);
790fa93854fSOgnjen Galic }
791fa93854fSOgnjen Galic
battery_hook_remove_battery(struct acpi_battery * battery)792fa93854fSOgnjen Galic static void battery_hook_remove_battery(struct acpi_battery *battery)
793fa93854fSOgnjen Galic {
794fa93854fSOgnjen Galic struct acpi_battery_hook *hook;
795fa93854fSOgnjen Galic
796fa93854fSOgnjen Galic mutex_lock(&hook_mutex);
797fa93854fSOgnjen Galic /*
798fa93854fSOgnjen Galic * Before removing the hook, we need to remove all
799fa93854fSOgnjen Galic * custom attributes from the battery.
800fa93854fSOgnjen Galic */
801fa93854fSOgnjen Galic list_for_each_entry(hook, &battery_hook_list, list) {
802878a82c2SArmin Wolf hook->remove_battery(battery->bat, hook);
803fa93854fSOgnjen Galic }
804fa93854fSOgnjen Galic /* Then, just remove the battery from the list */
805fa93854fSOgnjen Galic list_del(&battery->list);
806fa93854fSOgnjen Galic mutex_unlock(&hook_mutex);
807fa93854fSOgnjen Galic }
808fa93854fSOgnjen Galic
battery_hook_exit(void)809fa93854fSOgnjen Galic static void __exit battery_hook_exit(void)
810fa93854fSOgnjen Galic {
811fa93854fSOgnjen Galic struct acpi_battery_hook *hook;
812fa93854fSOgnjen Galic struct acpi_battery_hook *ptr;
813fa93854fSOgnjen Galic /*
814fa93854fSOgnjen Galic * At this point, the acpi_bus_unregister_driver()
815fa93854fSOgnjen Galic * has called remove for all batteries. We just
816fa93854fSOgnjen Galic * need to remove the hooks.
817fa93854fSOgnjen Galic */
818fa93854fSOgnjen Galic list_for_each_entry_safe(hook, ptr, &battery_hook_list, list) {
819fa93854fSOgnjen Galic __battery_hook_unregister(hook, 1);
820fa93854fSOgnjen Galic }
821fa93854fSOgnjen Galic mutex_destroy(&hook_mutex);
822fa93854fSOgnjen Galic }
823fa93854fSOgnjen Galic
sysfs_add_battery(struct acpi_battery * battery)824508df92dSAndrey Borzenkov static int sysfs_add_battery(struct acpi_battery *battery)
825508df92dSAndrey Borzenkov {
826297d716fSKrzysztof Kozlowski struct power_supply_config psy_cfg = { .drv_data = battery, };
827ff3154d1SHans de Goede bool full_cap_broken = false;
828ff3154d1SHans de Goede
829ff3154d1SHans de Goede if (!ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity) &&
830ff3154d1SHans de Goede !ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity))
831ff3154d1SHans de Goede full_cap_broken = true;
832508df92dSAndrey Borzenkov
833ae6f6187SLan Tianyu if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) {
834ff3154d1SHans de Goede if (full_cap_broken) {
835ff3154d1SHans de Goede battery->bat_desc.properties =
836ff3154d1SHans de Goede charge_battery_full_cap_broken_props;
837ff3154d1SHans de Goede battery->bat_desc.num_properties =
838ff3154d1SHans de Goede ARRAY_SIZE(charge_battery_full_cap_broken_props);
839ff3154d1SHans de Goede } else {
840297d716fSKrzysztof Kozlowski battery->bat_desc.properties = charge_battery_props;
841297d716fSKrzysztof Kozlowski battery->bat_desc.num_properties =
842d7380965SAlexey Starikovskiy ARRAY_SIZE(charge_battery_props);
843ff3154d1SHans de Goede }
844ff3154d1SHans de Goede } else {
845ff3154d1SHans de Goede if (full_cap_broken) {
846b41901a2SHans de Goede battery->bat_desc.properties =
847b41901a2SHans de Goede energy_battery_full_cap_broken_props;
848b41901a2SHans de Goede battery->bat_desc.num_properties =
849b41901a2SHans de Goede ARRAY_SIZE(energy_battery_full_cap_broken_props);
850d7380965SAlexey Starikovskiy } else {
851297d716fSKrzysztof Kozlowski battery->bat_desc.properties = energy_battery_props;
852297d716fSKrzysztof Kozlowski battery->bat_desc.num_properties =
853d7380965SAlexey Starikovskiy ARRAY_SIZE(energy_battery_props);
854d7380965SAlexey Starikovskiy }
855ff3154d1SHans de Goede }
856508df92dSAndrey Borzenkov
857297d716fSKrzysztof Kozlowski battery->bat_desc.name = acpi_device_bid(battery->device);
858297d716fSKrzysztof Kozlowski battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY;
859297d716fSKrzysztof Kozlowski battery->bat_desc.get_property = acpi_battery_get_property;
860508df92dSAndrey Borzenkov
861297d716fSKrzysztof Kozlowski battery->bat = power_supply_register_no_ws(&battery->device->dev,
862297d716fSKrzysztof Kozlowski &battery->bat_desc, &psy_cfg);
863e0d1f09eSZhang Rui
864297d716fSKrzysztof Kozlowski if (IS_ERR(battery->bat)) {
865297d716fSKrzysztof Kozlowski int result = PTR_ERR(battery->bat);
866297d716fSKrzysztof Kozlowski
867297d716fSKrzysztof Kozlowski battery->bat = NULL;
868508df92dSAndrey Borzenkov return result;
869297d716fSKrzysztof Kozlowski }
870fa93854fSOgnjen Galic battery_hook_add_battery(battery);
871297d716fSKrzysztof Kozlowski return device_create_file(&battery->bat->dev, &alarm_attr);
872b6ce4083SVladimir Lebedev }
873508df92dSAndrey Borzenkov
sysfs_remove_battery(struct acpi_battery * battery)874508df92dSAndrey Borzenkov static void sysfs_remove_battery(struct acpi_battery *battery)
875508df92dSAndrey Borzenkov {
87669d94ec6SSergey Senozhatsky mutex_lock(&battery->sysfs_lock);
877297d716fSKrzysztof Kozlowski if (!battery->bat) {
87869d94ec6SSergey Senozhatsky mutex_unlock(&battery->sysfs_lock);
879508df92dSAndrey Borzenkov return;
8809c921c22SLan Tianyu }
881fa93854fSOgnjen Galic battery_hook_remove_battery(battery);
882297d716fSKrzysztof Kozlowski device_remove_file(&battery->bat->dev, &alarm_attr);
883297d716fSKrzysztof Kozlowski power_supply_unregister(battery->bat);
884297d716fSKrzysztof Kozlowski battery->bat = NULL;
88569d94ec6SSergey Senozhatsky mutex_unlock(&battery->sysfs_lock);
886bc76f90bSHector Martin }
887bc76f90bSHector Martin
find_battery(const struct dmi_header * dm,void * private)8884000e626SKamil Iskra static void find_battery(const struct dmi_header *dm, void *private)
8894000e626SKamil Iskra {
8904000e626SKamil Iskra struct acpi_battery *battery = (struct acpi_battery *)private;
8914000e626SKamil Iskra /* Note: the hardcoded offsets below have been extracted from
89265545abdSXiaofei Tan * the source code of dmidecode.
89365545abdSXiaofei Tan */
8944000e626SKamil Iskra if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) {
8954000e626SKamil Iskra const u8 *dmi_data = (const u8 *)(dm + 1);
8964000e626SKamil Iskra int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6));
89765545abdSXiaofei Tan
8984000e626SKamil Iskra if (dm->length >= 18)
8994000e626SKamil Iskra dmi_capacity *= dmi_data[17];
9004000e626SKamil Iskra if (battery->design_capacity * battery->design_voltage / 1000
9014000e626SKamil Iskra != dmi_capacity &&
9024000e626SKamil Iskra battery->design_capacity * 10 == dmi_capacity)
9034000e626SKamil Iskra set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH,
9044000e626SKamil Iskra &battery->flags);
9054000e626SKamil Iskra }
9064000e626SKamil Iskra }
9074000e626SKamil Iskra
908557d5868SZhang Rui /*
909557d5868SZhang Rui * According to the ACPI spec, some kinds of primary batteries can
910557d5868SZhang Rui * report percentage battery remaining capacity directly to OS.
911557d5868SZhang Rui * In this case, it reports the Last Full Charged Capacity == 100
912557d5868SZhang Rui * and BatteryPresentRate == 0xFFFFFFFF.
913557d5868SZhang Rui *
914557d5868SZhang Rui * Now we found some battery reports percentage remaining capacity
915557d5868SZhang Rui * even if it's rechargeable.
916557d5868SZhang Rui * https://bugzilla.kernel.org/show_bug.cgi?id=15979
917557d5868SZhang Rui *
918557d5868SZhang Rui * Handle this correctly so that they won't break userspace.
919557d5868SZhang Rui */
acpi_battery_quirks(struct acpi_battery * battery)9207b78622dSLan Tianyu static void acpi_battery_quirks(struct acpi_battery *battery)
921557d5868SZhang Rui {
922557d5868SZhang Rui if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
923557d5868SZhang Rui return;
924557d5868SZhang Rui
925557d5868SZhang Rui if (battery->full_charge_capacity == 100 &&
926557d5868SZhang Rui battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN &&
927557d5868SZhang Rui battery->capacity_now >= 0 && battery->capacity_now <= 100) {
928557d5868SZhang Rui set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags);
929557d5868SZhang Rui battery->full_charge_capacity = battery->design_capacity;
930557d5868SZhang Rui battery->capacity_now = (battery->capacity_now *
931557d5868SZhang Rui battery->full_charge_capacity) / 100;
932557d5868SZhang Rui }
9334000e626SKamil Iskra
9344000e626SKamil Iskra if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags))
9354000e626SKamil Iskra return;
9364000e626SKamil Iskra
9374000e626SKamil Iskra if (battery->power_unit && dmi_name_in_vendors("LENOVO")) {
9384000e626SKamil Iskra const char *s;
93965545abdSXiaofei Tan
9404000e626SKamil Iskra s = dmi_get_system_info(DMI_PRODUCT_VERSION);
941ffd8a731SRasmus Villemoes if (s && !strncasecmp(s, "ThinkPad", 8)) {
9424000e626SKamil Iskra dmi_walk(find_battery, battery);
9434000e626SKamil Iskra if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH,
9444000e626SKamil Iskra &battery->flags) &&
9454000e626SKamil Iskra battery->design_voltage) {
9464000e626SKamil Iskra battery->design_capacity =
9474000e626SKamil Iskra battery->design_capacity *
9484000e626SKamil Iskra 10000 / battery->design_voltage;
9494000e626SKamil Iskra battery->full_charge_capacity =
9504000e626SKamil Iskra battery->full_charge_capacity *
9514000e626SKamil Iskra 10000 / battery->design_voltage;
9524000e626SKamil Iskra battery->design_capacity_warning =
9534000e626SKamil Iskra battery->design_capacity_warning *
9544000e626SKamil Iskra 10000 / battery->design_voltage;
9554000e626SKamil Iskra battery->capacity_now = battery->capacity_now *
9564000e626SKamil Iskra 10000 / battery->design_voltage;
9574000e626SKamil Iskra }
9584000e626SKamil Iskra }
9594000e626SKamil Iskra }
960a20136a6SLaszlo Toth
961a20136a6SLaszlo Toth if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags))
962a20136a6SLaszlo Toth return;
963a20136a6SLaszlo Toth
964a20136a6SLaszlo Toth if (acpi_battery_is_degraded(battery) &&
965a20136a6SLaszlo Toth battery->capacity_now > battery->full_charge_capacity) {
966a20136a6SLaszlo Toth set_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags);
967a20136a6SLaszlo Toth battery->capacity_now = battery->full_charge_capacity;
968a20136a6SLaszlo Toth }
969557d5868SZhang Rui }
970557d5868SZhang Rui
acpi_battery_update(struct acpi_battery * battery,bool resume)9719e50bc14SLan Tianyu static int acpi_battery_update(struct acpi_battery *battery, bool resume)
972508df92dSAndrey Borzenkov {
97382f2d305SLucas Rangit Magasweran int result = acpi_battery_get_status(battery);
97482f2d305SLucas Rangit Magasweran
975508df92dSAndrey Borzenkov if (result)
976508df92dSAndrey Borzenkov return result;
97782f2d305SLucas Rangit Magasweran
978508df92dSAndrey Borzenkov if (!acpi_battery_present(battery)) {
979508df92dSAndrey Borzenkov sysfs_remove_battery(battery);
98097749cd9SAlexey Starikovskiy battery->update_time = 0;
981508df92dSAndrey Borzenkov return 0;
982508df92dSAndrey Borzenkov }
9839e50bc14SLan Tianyu
9849e50bc14SLan Tianyu if (resume)
9859e50bc14SLan Tianyu return 0;
9869e50bc14SLan Tianyu
98782f2d305SLucas Rangit Magasweran if (!battery->update_time) {
98897749cd9SAlexey Starikovskiy result = acpi_battery_get_info(battery);
98997749cd9SAlexey Starikovskiy if (result)
99097749cd9SAlexey Starikovskiy return result;
99197749cd9SAlexey Starikovskiy acpi_battery_init_alarm(battery);
99297749cd9SAlexey Starikovskiy }
99312c78ca2SCarlos Garnacho
99412c78ca2SCarlos Garnacho result = acpi_battery_get_state(battery);
99512c78ca2SCarlos Garnacho if (result)
99612c78ca2SCarlos Garnacho return result;
99712c78ca2SCarlos Garnacho acpi_battery_quirks(battery);
99812c78ca2SCarlos Garnacho
999297d716fSKrzysztof Kozlowski if (!battery->bat) {
1000eb03cb02SStefan Hajnoczi result = sysfs_add_battery(battery);
1001eb03cb02SStefan Hajnoczi if (result)
1002eb03cb02SStefan Hajnoczi return result;
1003eb03cb02SStefan Hajnoczi }
1004e0d1f09eSZhang Rui
1005e0d1f09eSZhang Rui /*
1006e0d1f09eSZhang Rui * Wakeup the system if battery is critical low
1007e0d1f09eSZhang Rui * or lower than the alarm level
1008e0d1f09eSZhang Rui */
1009e0d1f09eSZhang Rui if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) ||
1010e0d1f09eSZhang Rui (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) &&
1011e0d1f09eSZhang Rui (battery->capacity_now <= battery->alarm)))
101233e4f80eSRafael J. Wysocki acpi_pm_wakeup_event(&battery->device->dev);
1013e0d1f09eSZhang Rui
1014557d5868SZhang Rui return result;
10154bd35cdbSVladimir Lebedev }
10164bd35cdbSVladimir Lebedev
acpi_battery_refresh(struct acpi_battery * battery)1017da8aeb92SRafael J. Wysocki static void acpi_battery_refresh(struct acpi_battery *battery)
1018da8aeb92SRafael J. Wysocki {
1019c5971456SAndy Whitcroft int power_unit;
1020c5971456SAndy Whitcroft
1021297d716fSKrzysztof Kozlowski if (!battery->bat)
1022da8aeb92SRafael J. Wysocki return;
1023da8aeb92SRafael J. Wysocki
1024c5971456SAndy Whitcroft power_unit = battery->power_unit;
1025c5971456SAndy Whitcroft
1026da8aeb92SRafael J. Wysocki acpi_battery_get_info(battery);
1027c5971456SAndy Whitcroft
1028c5971456SAndy Whitcroft if (power_unit == battery->power_unit)
1029c5971456SAndy Whitcroft return;
1030c5971456SAndy Whitcroft
1031c5971456SAndy Whitcroft /* The battery has changed its reporting units. */
1032da8aeb92SRafael J. Wysocki sysfs_remove_battery(battery);
1033da8aeb92SRafael J. Wysocki sysfs_add_battery(battery);
1034da8aeb92SRafael J. Wysocki }
1035da8aeb92SRafael J. Wysocki
103665545abdSXiaofei Tan /* Driver Interface */
acpi_battery_notify(acpi_handle handle,u32 event,void * data)1037*10666251SMichal Wilczynski static void acpi_battery_notify(acpi_handle handle, u32 event, void *data)
10381da177e4SLinus Torvalds {
1039*10666251SMichal Wilczynski struct acpi_device *device = data;
1040d9406691SBjorn Helgaas struct acpi_battery *battery = acpi_driver_data(device);
1041297d716fSKrzysztof Kozlowski struct power_supply *old;
1042d9406691SBjorn Helgaas
10431da177e4SLinus Torvalds if (!battery)
1044d550d98dSPatrick Mochel return;
1045297d716fSKrzysztof Kozlowski old = battery->bat;
1046f43691c6SAlexander Mezin /*
1047f43691c6SAlexander Mezin * On Acer Aspire V5-573G notifications are sometimes triggered too
1048f43691c6SAlexander Mezin * early. For example, when AC is unplugged and notification is
1049f43691c6SAlexander Mezin * triggered, battery state is still reported as "Full", and changes to
1050f43691c6SAlexander Mezin * "Discharging" only after short delay, without any notification.
1051f43691c6SAlexander Mezin */
1052f43691c6SAlexander Mezin if (battery_notification_delay_ms > 0)
1053f43691c6SAlexander Mezin msleep(battery_notification_delay_ms);
1054da8aeb92SRafael J. Wysocki if (event == ACPI_BATTERY_NOTIFY_INFO)
1055da8aeb92SRafael J. Wysocki acpi_battery_refresh(battery);
10569e50bc14SLan Tianyu acpi_battery_update(battery, false);
1057962ce8caSZhang Rui acpi_bus_generate_netlink_event(device->pnp.device_class,
10580794469dSKay Sievers dev_name(&device->dev), event,
10599ea7d575SVladimir Lebedev acpi_battery_present(battery));
1060411e0f77SAlexander Mezin acpi_notifier_call_chain(device, event, acpi_battery_present(battery));
10612345baf4SJustin P. Mattock /* acpi_battery_update could remove power_supply object */
1062297d716fSKrzysztof Kozlowski if (old && battery->bat)
1063297d716fSKrzysztof Kozlowski power_supply_changed(battery->bat);
10641da177e4SLinus Torvalds }
10651da177e4SLinus Torvalds
battery_notify(struct notifier_block * nb,unsigned long mode,void * _unused)106625be5821SKyle McMartin static int battery_notify(struct notifier_block *nb,
106725be5821SKyle McMartin unsigned long mode, void *_unused)
106825be5821SKyle McMartin {
106925be5821SKyle McMartin struct acpi_battery *battery = container_of(nb, struct acpi_battery,
107025be5821SKyle McMartin pm_nb);
10719e50bc14SLan Tianyu int result;
10729e50bc14SLan Tianyu
107325be5821SKyle McMartin switch (mode) {
1074d5a5911bSLan Tianyu case PM_POST_HIBERNATION:
107525be5821SKyle McMartin case PM_POST_SUSPEND:
10769e50bc14SLan Tianyu if (!acpi_battery_present(battery))
10779e50bc14SLan Tianyu return 0;
10789e50bc14SLan Tianyu
10792754435dSDmitry Rozhkov if (battery->bat) {
10802754435dSDmitry Rozhkov acpi_battery_refresh(battery);
10812754435dSDmitry Rozhkov } else {
10829e50bc14SLan Tianyu result = acpi_battery_get_info(battery);
10839e50bc14SLan Tianyu if (result)
10849e50bc14SLan Tianyu return result;
10859e50bc14SLan Tianyu
10869e50bc14SLan Tianyu result = sysfs_add_battery(battery);
10879e50bc14SLan Tianyu if (result)
10889e50bc14SLan Tianyu return result;
10892754435dSDmitry Rozhkov }
10909e50bc14SLan Tianyu
10919e50bc14SLan Tianyu acpi_battery_init_alarm(battery);
10929e50bc14SLan Tianyu acpi_battery_get_state(battery);
109325be5821SKyle McMartin break;
109425be5821SKyle McMartin }
109525be5821SKyle McMartin
109625be5821SKyle McMartin return 0;
109725be5821SKyle McMartin }
109825be5821SKyle McMartin
1099048d16daSMathias Krause static int __init
battery_bix_broken_package_quirk(const struct dmi_system_id * d)1100048d16daSMathias Krause battery_bix_broken_package_quirk(const struct dmi_system_id *d)
11013f5dc08fSAlexander Mezin {
11023f5dc08fSAlexander Mezin battery_bix_broken_package = 1;
11033f5dc08fSAlexander Mezin return 0;
11043f5dc08fSAlexander Mezin }
11053f5dc08fSAlexander Mezin
1106048d16daSMathias Krause static int __init
battery_notification_delay_quirk(const struct dmi_system_id * d)1107048d16daSMathias Krause battery_notification_delay_quirk(const struct dmi_system_id *d)
1108f43691c6SAlexander Mezin {
1109f43691c6SAlexander Mezin battery_notification_delay_ms = 1000;
1110f43691c6SAlexander Mezin return 0;
1111f43691c6SAlexander Mezin }
1112f43691c6SAlexander Mezin
11131b799c5cSHans de Goede static int __init
battery_ac_is_broken_quirk(const struct dmi_system_id * d)11141b799c5cSHans de Goede battery_ac_is_broken_quirk(const struct dmi_system_id *d)
11151b799c5cSHans de Goede {
11161b799c5cSHans de Goede battery_ac_is_broken = 1;
11171b799c5cSHans de Goede return 0;
11181b799c5cSHans de Goede }
11191b799c5cSHans de Goede
1120048d16daSMathias Krause static const struct dmi_system_id bat_dmi_table[] __initconst = {
1121a90b4038SLan Tianyu {
112291afa076SHans de Goede /* NEC LZ750/LS */
11233f5dc08fSAlexander Mezin .callback = battery_bix_broken_package_quirk,
1124a90b4038SLan Tianyu .matches = {
1125a90b4038SLan Tianyu DMI_MATCH(DMI_SYS_VENDOR, "NEC"),
1126a90b4038SLan Tianyu DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"),
1127a90b4038SLan Tianyu },
1128a90b4038SLan Tianyu },
1129f43691c6SAlexander Mezin {
113091afa076SHans de Goede /* Acer Aspire V5-573G */
1131f43691c6SAlexander Mezin .callback = battery_notification_delay_quirk,
1132f43691c6SAlexander Mezin .matches = {
1133f43691c6SAlexander Mezin DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1134f43691c6SAlexander Mezin DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"),
1135f43691c6SAlexander Mezin },
1136f43691c6SAlexander Mezin },
11371b799c5cSHans de Goede {
11381b799c5cSHans de Goede /* Point of View mobii wintab p800w */
11391b799c5cSHans de Goede .callback = battery_ac_is_broken_quirk,
11401b799c5cSHans de Goede .matches = {
11411b799c5cSHans de Goede DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
11421b799c5cSHans de Goede DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
11431b799c5cSHans de Goede DMI_MATCH(DMI_BIOS_VERSION, "3BAIR1013"),
11441b799c5cSHans de Goede /* Above matches are too generic, add bios-date match */
11451b799c5cSHans de Goede DMI_MATCH(DMI_BIOS_DATE, "08/22/2014"),
11461b799c5cSHans de Goede },
11471b799c5cSHans de Goede },
1148ec625a37SCarlo Caione {
11497dacee0bSMaximilian Luz /* Microsoft Surface Go 3 */
11507dacee0bSMaximilian Luz .callback = battery_notification_delay_quirk,
11517dacee0bSMaximilian Luz .matches = {
11527dacee0bSMaximilian Luz DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
11537dacee0bSMaximilian Luz DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go 3"),
11547dacee0bSMaximilian Luz },
11557dacee0bSMaximilian Luz },
1156a90b4038SLan Tianyu {},
1157a90b4038SLan Tianyu };
1158a90b4038SLan Tianyu
115975646e75SLan Tianyu /*
116075646e75SLan Tianyu * Some machines'(E,G Lenovo Z480) ECs are not stable
116175646e75SLan Tianyu * during boot up and this causes battery driver fails to be
116275646e75SLan Tianyu * probed due to failure of getting battery information
116375646e75SLan Tianyu * from EC sometimes. After several retries, the operation
116475646e75SLan Tianyu * may work. So add retry code here and 20ms sleep between
116575646e75SLan Tianyu * every retries.
116675646e75SLan Tianyu */
acpi_battery_update_retry(struct acpi_battery * battery)116775646e75SLan Tianyu static int acpi_battery_update_retry(struct acpi_battery *battery)
116875646e75SLan Tianyu {
116975646e75SLan Tianyu int retry, ret;
117075646e75SLan Tianyu
117175646e75SLan Tianyu for (retry = 5; retry; retry--) {
117275646e75SLan Tianyu ret = acpi_battery_update(battery, false);
117375646e75SLan Tianyu if (!ret)
117475646e75SLan Tianyu break;
117575646e75SLan Tianyu
117675646e75SLan Tianyu msleep(20);
117775646e75SLan Tianyu }
117875646e75SLan Tianyu return ret;
117975646e75SLan Tianyu }
118075646e75SLan Tianyu
acpi_battery_add(struct acpi_device * device)11814be44fcdSLen Brown static int acpi_battery_add(struct acpi_device *device)
11821da177e4SLinus Torvalds {
11831da177e4SLinus Torvalds int result = 0;
11841da177e4SLinus Torvalds struct acpi_battery *battery = NULL;
1185952c63e9SJiang Liu
11861da177e4SLinus Torvalds if (!device)
1187d550d98dSPatrick Mochel return -EINVAL;
118840e7fcb1SLan Tianyu
118940e7fcb1SLan Tianyu if (device->dep_unmet)
119040e7fcb1SLan Tianyu return -EPROBE_DEFER;
119140e7fcb1SLan Tianyu
119236bcbec7SBurman Yan battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
11931da177e4SLinus Torvalds if (!battery)
1194d550d98dSPatrick Mochel return -ENOMEM;
1195145def84SPatrick Mochel battery->device = device;
11961da177e4SLinus Torvalds strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
11971da177e4SLinus Torvalds strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
1198db89b4f0SPavel Machek device->driver_data = battery;
1199038fdea2SAlexey Starikovskiy mutex_init(&battery->lock);
120069d94ec6SSergey Senozhatsky mutex_init(&battery->sysfs_lock);
1201952c63e9SJiang Liu if (acpi_has_method(battery->device->handle, "_BIX"))
1202c67fcd67SAlexey Starikovskiy set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
120375646e75SLan Tianyu
120475646e75SLan Tianyu result = acpi_battery_update_retry(battery);
1205eb03cb02SStefan Hajnoczi if (result)
1206eb03cb02SStefan Hajnoczi goto fail;
120775646e75SLan Tianyu
1208bd8c5d1eSRafael J. Wysocki pr_info("Slot [%s] (battery %s)\n", acpi_device_bid(device),
1209e80bba4bSStefan Hajnoczi device->status.battery_present ? "present" : "absent");
1210e80bba4bSStefan Hajnoczi
121125be5821SKyle McMartin battery->pm_nb.notifier_call = battery_notify;
121225be5821SKyle McMartin register_pm_notifier(&battery->pm_nb);
121325be5821SKyle McMartin
1214e0d1f09eSZhang Rui device_init_wakeup(&device->dev, 1);
1215e0d1f09eSZhang Rui
1216*10666251SMichal Wilczynski result = acpi_dev_install_notify_handler(device, ACPI_ALL_NOTIFY,
1217*10666251SMichal Wilczynski acpi_battery_notify);
1218*10666251SMichal Wilczynski if (result)
1219*10666251SMichal Wilczynski goto fail_pm;
1220e80bba4bSStefan Hajnoczi
1221*10666251SMichal Wilczynski return 0;
1222*10666251SMichal Wilczynski
1223*10666251SMichal Wilczynski fail_pm:
1224*10666251SMichal Wilczynski device_init_wakeup(&device->dev, 0);
1225*10666251SMichal Wilczynski unregister_pm_notifier(&battery->pm_nb);
1226e80bba4bSStefan Hajnoczi fail:
1227e80bba4bSStefan Hajnoczi sysfs_remove_battery(battery);
1228e80bba4bSStefan Hajnoczi mutex_destroy(&battery->lock);
122969d94ec6SSergey Senozhatsky mutex_destroy(&battery->sysfs_lock);
1230e80bba4bSStefan Hajnoczi kfree(battery);
1231*10666251SMichal Wilczynski
1232e80bba4bSStefan Hajnoczi return result;
12331da177e4SLinus Torvalds }
12341da177e4SLinus Torvalds
acpi_battery_remove(struct acpi_device * device)12356c0eb5baSDawei Li static void acpi_battery_remove(struct acpi_device *device)
12361da177e4SLinus Torvalds {
12371da177e4SLinus Torvalds struct acpi_battery *battery = NULL;
12381da177e4SLinus Torvalds
12391da177e4SLinus Torvalds if (!device || !acpi_driver_data(device))
12406c0eb5baSDawei Li return;
1241*10666251SMichal Wilczynski
124250dd0969SJan Engelhardt battery = acpi_driver_data(device);
1243*10666251SMichal Wilczynski
1244*10666251SMichal Wilczynski acpi_dev_remove_notify_handler(device, ACPI_ALL_NOTIFY,
1245*10666251SMichal Wilczynski acpi_battery_notify);
1246*10666251SMichal Wilczynski
1247*10666251SMichal Wilczynski device_init_wakeup(&device->dev, 0);
124825be5821SKyle McMartin unregister_pm_notifier(&battery->pm_nb);
1249508df92dSAndrey Borzenkov sysfs_remove_battery(battery);
1250*10666251SMichal Wilczynski
1251038fdea2SAlexey Starikovskiy mutex_destroy(&battery->lock);
125269d94ec6SSergey Senozhatsky mutex_destroy(&battery->sysfs_lock);
12531da177e4SLinus Torvalds kfree(battery);
12541da177e4SLinus Torvalds }
12551da177e4SLinus Torvalds
125690692404SRafael J. Wysocki #ifdef CONFIG_PM_SLEEP
125734c4415aSJiri Kosina /* this is needed to learn about changes made in suspended state */
acpi_battery_resume(struct device * dev)1258a6f50dc8SRafael J. Wysocki static int acpi_battery_resume(struct device *dev)
125934c4415aSJiri Kosina {
126034c4415aSJiri Kosina struct acpi_battery *battery;
1261a6f50dc8SRafael J. Wysocki
1262a6f50dc8SRafael J. Wysocki if (!dev)
126334c4415aSJiri Kosina return -EINVAL;
1264a6f50dc8SRafael J. Wysocki
1265a6f50dc8SRafael J. Wysocki battery = acpi_driver_data(to_acpi_device(dev));
1266a6f50dc8SRafael J. Wysocki if (!battery)
1267a6f50dc8SRafael J. Wysocki return -EINVAL;
1268a6f50dc8SRafael J. Wysocki
1269f1d4661aSAlexey Starikovskiy battery->update_time = 0;
12709e50bc14SLan Tianyu acpi_battery_update(battery, true);
1271b6ce4083SVladimir Lebedev return 0;
127234c4415aSJiri Kosina }
12737f6895c6SShuah Khan #else
12747f6895c6SShuah Khan #define acpi_battery_resume NULL
127590692404SRafael J. Wysocki #endif
127634c4415aSJiri Kosina
1277a6f50dc8SRafael J. Wysocki static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume);
1278a6f50dc8SRafael J. Wysocki
1279aa650bbdSAlexey Starikovskiy static struct acpi_driver acpi_battery_driver = {
1280aa650bbdSAlexey Starikovskiy .name = "battery",
1281aa650bbdSAlexey Starikovskiy .class = ACPI_BATTERY_CLASS,
1282aa650bbdSAlexey Starikovskiy .ids = battery_device_ids,
1283aa650bbdSAlexey Starikovskiy .ops = {
1284aa650bbdSAlexey Starikovskiy .add = acpi_battery_add,
1285aa650bbdSAlexey Starikovskiy .remove = acpi_battery_remove,
1286aa650bbdSAlexey Starikovskiy },
1287a6f50dc8SRafael J. Wysocki .drv.pm = &acpi_battery_pm,
1288aa650bbdSAlexey Starikovskiy };
1289aa650bbdSAlexey Starikovskiy
acpi_battery_init_async(void * unused,async_cookie_t cookie)1290b0cbc861SLinus Torvalds static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie)
12911da177e4SLinus Torvalds {
1292479faaf0SLuis Henriques int result;
1293479faaf0SLuis Henriques
129457a18322SHans de Goede if (acpi_quirk_skip_acpi_ac_and_battery())
1295dccfae6dSHans de Goede return;
129657a18322SHans de Goede
129757a18322SHans de Goede dmi_check_system(bat_dmi_table);
12983a670cc7SLan Tianyu
1299479faaf0SLuis Henriques result = acpi_bus_register_driver(&acpi_battery_driver);
1300bc39fbcfSHans de Goede battery_driver_registered = (result == 0);
13010f66af53SArjan van de Ven }
13020f66af53SArjan van de Ven
acpi_battery_init(void)13030f66af53SArjan van de Ven static int __init acpi_battery_init(void)
13040f66af53SArjan van de Ven {
1305e234b074SLuis Henriques if (acpi_disabled)
1306e234b074SLuis Henriques return -ENODEV;
1307e234b074SLuis Henriques
1308eca21d91SLuis Henriques async_cookie = async_schedule(acpi_battery_init_async, NULL);
1309d550d98dSPatrick Mochel return 0;
13101da177e4SLinus Torvalds }
13111da177e4SLinus Torvalds
acpi_battery_exit(void)13124be44fcdSLen Brown static void __exit acpi_battery_exit(void)
13131da177e4SLinus Torvalds {
13145dfa0c73SChris Wilson async_synchronize_cookie(async_cookie + 1);
1315fa93854fSOgnjen Galic if (battery_driver_registered) {
13161da177e4SLinus Torvalds acpi_bus_unregister_driver(&acpi_battery_driver);
1317fa93854fSOgnjen Galic battery_hook_exit();
1318fa93854fSOgnjen Galic }
13191da177e4SLinus Torvalds }
13201da177e4SLinus Torvalds
13211da177e4SLinus Torvalds module_init(acpi_battery_init);
13221da177e4SLinus Torvalds module_exit(acpi_battery_exit);
1323