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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +04002 * battery.c - ACPI Battery Driver (Revision: 2.0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +04004 * Copyright (C) 2007 Alexey Starikovskiy <astarikovskiy@suse.de>
5 * Copyright (C) 2004-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
7 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
8 *
9 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License along
22 * with this program; if not, write to the Free Software Foundation, Inc.,
23 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
24 *
25 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 */
27
28#include <linux/kernel.h>
29#include <linux/module.h>
30#include <linux/init.h>
31#include <linux/types.h>
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +040032#include <linux/jiffies.h>
Arjan van de Ven0f66af52009-01-10 14:19:05 -050033#include <linux/async.h>
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040034
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030035#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <linux/proc_fs.h>
37#include <linux/seq_file.h>
38#include <asm/uaccess.h>
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040039#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
41#include <acpi/acpi_bus.h>
42#include <acpi/acpi_drivers.h>
43
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050044#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040045#include <linux/power_supply.h>
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050046#endif
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040047
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
49
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#define ACPI_BATTERY_CLASS "battery"
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#define ACPI_BATTERY_DEVICE_NAME "Battery"
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#define ACPI_BATTERY_NOTIFY_STATUS 0x80
53#define ACPI_BATTERY_NOTIFY_INFO 0x81
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
Linus Torvalds1da177e2005-04-16 15:20:36 -070055#define _COMPONENT ACPI_BATTERY_COMPONENT
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +030056
Len Brownf52fd662007-02-12 22:42:12 -050057ACPI_MODULE_NAME("battery");
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Len Brownf52fd662007-02-12 22:42:12 -050059MODULE_AUTHOR("Paul Diefenbaugh");
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +040060MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
Len Brown7cda93e2007-02-12 23:50:02 -050061MODULE_DESCRIPTION("ACPI Battery Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -070062MODULE_LICENSE("GPL");
63
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +040064static unsigned int cache_time = 1000;
65module_param(cache_time, uint, 0644);
66MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +030067
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030068#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -040069extern struct proc_dir_entry *acpi_lock_battery_dir(void);
70extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
71
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +040072enum acpi_battery_files {
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +040073 info_tag = 0,
74 state_tag,
75 alarm_tag,
Alexey Starikovskiy78490d82007-05-11 13:18:55 -040076 ACPI_BATTERY_NUMFILES,
77};
78
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040079#endif
80
81static const struct acpi_device_id battery_device_ids[] = {
82 {"PNP0C0A", 0},
83 {"", 0},
84};
85
86MODULE_DEVICE_TABLE(acpi, battery_device_ids);
87
88
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +040089struct acpi_battery {
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +040090 struct mutex lock;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050091#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040092 struct power_supply bat;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050093#endif
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +040094 struct acpi_device *device;
95 unsigned long update_time;
Alexey Starikovskiy7faa1442009-03-27 22:23:52 -040096 int rate_now;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040097 int capacity_now;
98 int voltage_now;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +040099 int design_capacity;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400100 int full_charge_capacity;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400101 int technology;
102 int design_voltage;
103 int design_capacity_warning;
104 int design_capacity_low;
105 int capacity_granularity_1;
106 int capacity_granularity_2;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400107 int alarm;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400108 char model_number[32];
109 char serial_number[32];
110 char type[32];
111 char oem_info[32];
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400112 int state;
113 int power_unit;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300114 u8 alarm_present;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115};
116
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400117#define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
118
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400119inline int acpi_battery_present(struct acpi_battery *battery)
120{
121 return battery->device->status.battery_present;
122}
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400123
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500124#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400125static int acpi_battery_technology(struct acpi_battery *battery)
126{
127 if (!strcasecmp("NiCd", battery->type))
128 return POWER_SUPPLY_TECHNOLOGY_NiCd;
129 if (!strcasecmp("NiMH", battery->type))
130 return POWER_SUPPLY_TECHNOLOGY_NiMH;
131 if (!strcasecmp("LION", battery->type))
132 return POWER_SUPPLY_TECHNOLOGY_LION;
Andrey Borzenkovad40e682007-11-10 20:02:49 +0300133 if (!strncasecmp("LI-ION", battery->type, 6))
Alexey Starikovskiy0bde7ee2007-10-28 15:33:10 +0300134 return POWER_SUPPLY_TECHNOLOGY_LION;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400135 if (!strcasecmp("LiP", battery->type))
136 return POWER_SUPPLY_TECHNOLOGY_LIPO;
137 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
138}
139
Alexey Starikovskiy91044762007-11-13 12:23:06 +0300140static int acpi_battery_get_state(struct acpi_battery *battery);
Alexey Starikovskiyb19073a2007-10-25 17:10:47 -0400141
Richard Hughes56f382a2009-01-25 15:05:50 +0000142static int acpi_battery_is_charged(struct acpi_battery *battery)
143{
144 /* either charging or discharging */
145 if (battery->state != 0)
146 return 0;
147
148 /* battery not reporting charge */
149 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN ||
150 battery->capacity_now == 0)
151 return 0;
152
153 /* good batteries update full_charge as the batteries degrade */
154 if (battery->full_charge_capacity == battery->capacity_now)
155 return 1;
156
157 /* fallback to using design values for broken batteries */
158 if (battery->design_capacity == battery->capacity_now)
159 return 1;
160
161 /* we don't do any sort of metric based on percentages */
162 return 0;
163}
164
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400165static int acpi_battery_get_property(struct power_supply *psy,
166 enum power_supply_property psp,
167 union power_supply_propval *val)
168{
169 struct acpi_battery *battery = to_acpi_battery(psy);
170
Alexey Starikovskiy91044762007-11-13 12:23:06 +0300171 if (acpi_battery_present(battery)) {
172 /* run battery update only if it is present */
173 acpi_battery_get_state(battery);
174 } else if (psp != POWER_SUPPLY_PROP_PRESENT)
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400175 return -ENODEV;
176 switch (psp) {
177 case POWER_SUPPLY_PROP_STATUS:
178 if (battery->state & 0x01)
179 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
180 else if (battery->state & 0x02)
181 val->intval = POWER_SUPPLY_STATUS_CHARGING;
Richard Hughes56f382a2009-01-25 15:05:50 +0000182 else if (acpi_battery_is_charged(battery))
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400183 val->intval = POWER_SUPPLY_STATUS_FULL;
Roland Dreier4c41d3a2007-11-07 15:09:09 -0800184 else
185 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400186 break;
187 case POWER_SUPPLY_PROP_PRESENT:
188 val->intval = acpi_battery_present(battery);
189 break;
190 case POWER_SUPPLY_PROP_TECHNOLOGY:
191 val->intval = acpi_battery_technology(battery);
192 break;
193 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
194 val->intval = battery->design_voltage * 1000;
195 break;
196 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
197 val->intval = battery->voltage_now * 1000;
198 break;
199 case POWER_SUPPLY_PROP_CURRENT_NOW:
Alexey Starikovskiy7faa1442009-03-27 22:23:52 -0400200 case POWER_SUPPLY_PROP_POWER_NOW:
201 val->intval = battery->rate_now * 1000;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400202 break;
203 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
204 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
205 val->intval = battery->design_capacity * 1000;
206 break;
207 case POWER_SUPPLY_PROP_CHARGE_FULL:
208 case POWER_SUPPLY_PROP_ENERGY_FULL:
209 val->intval = battery->full_charge_capacity * 1000;
210 break;
211 case POWER_SUPPLY_PROP_CHARGE_NOW:
212 case POWER_SUPPLY_PROP_ENERGY_NOW:
213 val->intval = battery->capacity_now * 1000;
214 break;
215 case POWER_SUPPLY_PROP_MODEL_NAME:
216 val->strval = battery->model_number;
217 break;
218 case POWER_SUPPLY_PROP_MANUFACTURER:
219 val->strval = battery->oem_info;
220 break;
maximilian attems7c2670b2008-01-22 18:46:50 +0100221 case POWER_SUPPLY_PROP_SERIAL_NUMBER:
222 val->strval = battery->serial_number;
223 break;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400224 default:
225 return -EINVAL;
226 }
227 return 0;
228}
229
230static enum power_supply_property charge_battery_props[] = {
231 POWER_SUPPLY_PROP_STATUS,
232 POWER_SUPPLY_PROP_PRESENT,
233 POWER_SUPPLY_PROP_TECHNOLOGY,
234 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
235 POWER_SUPPLY_PROP_VOLTAGE_NOW,
236 POWER_SUPPLY_PROP_CURRENT_NOW,
237 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
238 POWER_SUPPLY_PROP_CHARGE_FULL,
239 POWER_SUPPLY_PROP_CHARGE_NOW,
240 POWER_SUPPLY_PROP_MODEL_NAME,
241 POWER_SUPPLY_PROP_MANUFACTURER,
maximilian attems7c2670b2008-01-22 18:46:50 +0100242 POWER_SUPPLY_PROP_SERIAL_NUMBER,
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400243};
244
245static enum power_supply_property energy_battery_props[] = {
246 POWER_SUPPLY_PROP_STATUS,
247 POWER_SUPPLY_PROP_PRESENT,
248 POWER_SUPPLY_PROP_TECHNOLOGY,
249 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
250 POWER_SUPPLY_PROP_VOLTAGE_NOW,
251 POWER_SUPPLY_PROP_CURRENT_NOW,
Alexey Starikovskiy7faa1442009-03-27 22:23:52 -0400252 POWER_SUPPLY_PROP_POWER_NOW,
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400253 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
254 POWER_SUPPLY_PROP_ENERGY_FULL,
255 POWER_SUPPLY_PROP_ENERGY_NOW,
256 POWER_SUPPLY_PROP_MODEL_NAME,
257 POWER_SUPPLY_PROP_MANUFACTURER,
maximilian attems7c2670b2008-01-22 18:46:50 +0100258 POWER_SUPPLY_PROP_SERIAL_NUMBER,
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400259};
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500260#endif
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400261
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300262#ifdef CONFIG_ACPI_PROCFS_POWER
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400263inline char *acpi_battery_units(struct acpi_battery *battery)
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400264{
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400265 return (battery->power_unit)?"mA":"mW";
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400266}
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400267#endif
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300268
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269/* --------------------------------------------------------------------------
270 Battery Management
271 -------------------------------------------------------------------------- */
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400272struct acpi_offsets {
273 size_t offset; /* offset inside struct acpi_sbs_battery */
274 u8 mode; /* int or string? */
275};
276
277static struct acpi_offsets state_offsets[] = {
278 {offsetof(struct acpi_battery, state), 0},
Alexey Starikovskiy7faa1442009-03-27 22:23:52 -0400279 {offsetof(struct acpi_battery, rate_now), 0},
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400280 {offsetof(struct acpi_battery, capacity_now), 0},
281 {offsetof(struct acpi_battery, voltage_now), 0},
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400282};
283
284static struct acpi_offsets info_offsets[] = {
285 {offsetof(struct acpi_battery, power_unit), 0},
286 {offsetof(struct acpi_battery, design_capacity), 0},
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400287 {offsetof(struct acpi_battery, full_charge_capacity), 0},
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400288 {offsetof(struct acpi_battery, technology), 0},
289 {offsetof(struct acpi_battery, design_voltage), 0},
290 {offsetof(struct acpi_battery, design_capacity_warning), 0},
291 {offsetof(struct acpi_battery, design_capacity_low), 0},
292 {offsetof(struct acpi_battery, capacity_granularity_1), 0},
293 {offsetof(struct acpi_battery, capacity_granularity_2), 0},
294 {offsetof(struct acpi_battery, model_number), 1},
295 {offsetof(struct acpi_battery, serial_number), 1},
296 {offsetof(struct acpi_battery, type), 1},
297 {offsetof(struct acpi_battery, oem_info), 1},
298};
299
300static int extract_package(struct acpi_battery *battery,
301 union acpi_object *package,
302 struct acpi_offsets *offsets, int num)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300303{
Alexey Starikovskiy106449e2007-10-29 23:29:40 +0300304 int i;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400305 union acpi_object *element;
306 if (package->type != ACPI_TYPE_PACKAGE)
307 return -EFAULT;
308 for (i = 0; i < num; ++i) {
309 if (package->package.count <= i)
310 return -EFAULT;
311 element = &package->package.elements[i];
312 if (offsets[i].mode) {
Alexey Starikovskiy106449e2007-10-29 23:29:40 +0300313 u8 *ptr = (u8 *)battery + offsets[i].offset;
314 if (element->type == ACPI_TYPE_STRING ||
315 element->type == ACPI_TYPE_BUFFER)
316 strncpy(ptr, element->string.pointer, 32);
317 else if (element->type == ACPI_TYPE_INTEGER) {
318 strncpy(ptr, (u8 *)&element->integer.value,
319 sizeof(acpi_integer));
320 ptr[sizeof(acpi_integer)] = 0;
Alexey Starikovskiyb8a1bdb2008-03-17 22:37:42 -0400321 } else
322 *ptr = 0; /* don't have value */
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400323 } else {
Alexey Starikovskiyb8a1bdb2008-03-17 22:37:42 -0400324 int *x = (int *)((u8 *)battery + offsets[i].offset);
325 *x = (element->type == ACPI_TYPE_INTEGER) ?
326 element->integer.value : -1;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300327 }
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300328 }
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300329 return 0;
330}
331
332static int acpi_battery_get_status(struct acpi_battery *battery)
333{
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400334 if (acpi_bus_get_status(battery->device)) {
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300335 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA"));
336 return -ENODEV;
337 }
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400338 return 0;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300339}
340
341static int acpi_battery_get_info(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342{
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400343 int result = -EFAULT;
Len Brown4be44fc2005-08-05 00:44:28 -0400344 acpi_status status = 0;
345 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300347 if (!acpi_battery_present(battery))
348 return 0;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400349 mutex_lock(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400350 status = acpi_evaluate_object(battery->device->handle, "_BIF",
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400351 NULL, &buffer);
352 mutex_unlock(&battery->lock);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400353
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 if (ACPI_FAILURE(status)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400355 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400356 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 }
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400358
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400359 result = extract_package(battery, buffer.pointer,
360 info_offsets, ARRAY_SIZE(info_offsets));
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400361 kfree(buffer.pointer);
Patrick Mocheld550d982006-06-27 00:41:40 -0400362 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363}
364
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300365static int acpi_battery_get_state(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366{
Len Brown4be44fc2005-08-05 00:44:28 -0400367 int result = 0;
368 acpi_status status = 0;
369 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300371 if (!acpi_battery_present(battery))
372 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400374 if (battery->update_time &&
375 time_before(jiffies, battery->update_time +
376 msecs_to_jiffies(cache_time)))
377 return 0;
378
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400379 mutex_lock(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400380 status = acpi_evaluate_object(battery->device->handle, "_BST",
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400381 NULL, &buffer);
382 mutex_unlock(&battery->lock);
Len Brown5b31d892007-08-15 00:19:26 -0400383
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 if (ACPI_FAILURE(status)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400385 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400386 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 }
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400388
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400389 result = extract_package(battery, buffer.pointer,
390 state_offsets, ARRAY_SIZE(state_offsets));
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400391 battery->update_time = jiffies;
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400392 kfree(buffer.pointer);
Patrick Mocheld550d982006-06-27 00:41:40 -0400393 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394}
395
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400396static int acpi_battery_set_alarm(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397{
Len Brown4be44fc2005-08-05 00:44:28 -0400398 acpi_status status = 0;
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400399 union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER };
Len Brown4be44fc2005-08-05 00:44:28 -0400400 struct acpi_object_list arg_list = { 1, &arg0 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400402 if (!acpi_battery_present(battery)|| !battery->alarm_present)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300403 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400405 arg0.integer.value = battery->alarm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400407 mutex_lock(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400408 status = acpi_evaluate_object(battery->device->handle, "_BTP",
409 &arg_list, NULL);
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400410 mutex_unlock(&battery->lock);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400411
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400413 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400415 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm));
Patrick Mocheld550d982006-06-27 00:41:40 -0400416 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417}
418
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300419static int acpi_battery_init_alarm(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420{
Len Brown4be44fc2005-08-05 00:44:28 -0400421 acpi_status status = AE_OK;
422 acpi_handle handle = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300424 /* See if alarms are supported, and if so, set default */
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400425 status = acpi_get_handle(battery->device->handle, "_BTP", &handle);
426 if (ACPI_FAILURE(status)) {
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400427 battery->alarm_present = 0;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400428 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 }
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400430 battery->alarm_present = 1;
431 if (!battery->alarm)
432 battery->alarm = battery->design_capacity_warning;
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400433 return acpi_battery_set_alarm(battery);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434}
435
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500436#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300437static ssize_t acpi_battery_alarm_show(struct device *dev,
438 struct device_attribute *attr,
439 char *buf)
440{
441 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
442 return sprintf(buf, "%d\n", battery->alarm * 1000);
443}
444
445static ssize_t acpi_battery_alarm_store(struct device *dev,
446 struct device_attribute *attr,
447 const char *buf, size_t count)
448{
449 unsigned long x;
450 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
451 if (sscanf(buf, "%ld\n", &x) == 1)
452 battery->alarm = x/1000;
453 if (acpi_battery_present(battery))
454 acpi_battery_set_alarm(battery);
455 return count;
456}
457
458static struct device_attribute alarm_attr = {
Parag Warudkar01e8ef12008-10-18 20:28:50 -0700459 .attr = {.name = "alarm", .mode = 0644},
Andrey Borzenkov508df922007-10-28 12:50:09 +0300460 .show = acpi_battery_alarm_show,
461 .store = acpi_battery_alarm_store,
462};
463
464static int sysfs_add_battery(struct acpi_battery *battery)
465{
466 int result;
467
Andrey Borzenkov508df922007-10-28 12:50:09 +0300468 if (battery->power_unit) {
469 battery->bat.properties = charge_battery_props;
470 battery->bat.num_properties =
471 ARRAY_SIZE(charge_battery_props);
472 } else {
473 battery->bat.properties = energy_battery_props;
474 battery->bat.num_properties =
475 ARRAY_SIZE(energy_battery_props);
476 }
477
478 battery->bat.name = acpi_device_bid(battery->device);
479 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
480 battery->bat.get_property = acpi_battery_get_property;
481
482 result = power_supply_register(&battery->device->dev, &battery->bat);
483 if (result)
484 return result;
485 return device_create_file(battery->bat.dev, &alarm_attr);
486}
487
488static void sysfs_remove_battery(struct acpi_battery *battery)
489{
490 if (!battery->bat.dev)
491 return;
492 device_remove_file(battery->bat.dev, &alarm_attr);
493 power_supply_unregister(&battery->bat);
Alexey Starikovskiy91044762007-11-13 12:23:06 +0300494 battery->bat.dev = NULL;
Andrey Borzenkov508df922007-10-28 12:50:09 +0300495}
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500496#endif
Andrey Borzenkov508df922007-10-28 12:50:09 +0300497
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400498static int acpi_battery_update(struct acpi_battery *battery)
Vladimir Lebedev4bd35cd2007-02-10 01:43:48 -0500499{
Alexey Starikovskiy50b17852008-12-23 02:44:54 +0300500 int result, old_present = acpi_battery_present(battery);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500501 result = acpi_battery_get_status(battery);
Andrey Borzenkov508df922007-10-28 12:50:09 +0300502 if (result)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300503 return result;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500504#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300505 if (!acpi_battery_present(battery)) {
506 sysfs_remove_battery(battery);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500507 battery->update_time = 0;
Andrey Borzenkov508df922007-10-28 12:50:09 +0300508 return 0;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300509 }
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500510#endif
Alexey Starikovskiy50b17852008-12-23 02:44:54 +0300511 if (!battery->update_time ||
512 old_present != acpi_battery_present(battery)) {
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500513 result = acpi_battery_get_info(battery);
514 if (result)
515 return result;
516 acpi_battery_init_alarm(battery);
517 }
518#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300519 if (!battery->bat.dev)
520 sysfs_add_battery(battery);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500521#endif
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400522 return acpi_battery_get_state(battery);
Vladimir Lebedev4bd35cd2007-02-10 01:43:48 -0500523}
524
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525/* --------------------------------------------------------------------------
526 FS Interface (/proc)
527 -------------------------------------------------------------------------- */
528
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300529#ifdef CONFIG_ACPI_PROCFS_POWER
Len Brown4be44fc2005-08-05 00:44:28 -0400530static struct proc_dir_entry *acpi_battery_dir;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300531
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400532static int acpi_battery_print_info(struct seq_file *seq, int result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200534 struct acpi_battery *battery = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300536 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 goto end;
538
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400539 seq_printf(seq, "present: %s\n",
540 acpi_battery_present(battery)?"yes":"no");
541 if (!acpi_battery_present(battery))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 goto end;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400543 if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 seq_printf(seq, "design capacity: unknown\n");
545 else
546 seq_printf(seq, "design capacity: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400547 battery->design_capacity,
548 acpi_battery_units(battery));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400550 if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 seq_printf(seq, "last full capacity: unknown\n");
552 else
553 seq_printf(seq, "last full capacity: %d %sh\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400554 battery->full_charge_capacity,
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400555 acpi_battery_units(battery));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400557 seq_printf(seq, "battery technology: %srechargeable\n",
558 (!battery->technology)?"non-":"");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400560 if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 seq_printf(seq, "design voltage: unknown\n");
562 else
563 seq_printf(seq, "design voltage: %d mV\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400564 battery->design_voltage);
Len Brown4be44fc2005-08-05 00:44:28 -0400565 seq_printf(seq, "design capacity warning: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400566 battery->design_capacity_warning,
567 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400568 seq_printf(seq, "design capacity low: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400569 battery->design_capacity_low,
570 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400571 seq_printf(seq, "capacity granularity 1: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400572 battery->capacity_granularity_1,
573 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400574 seq_printf(seq, "capacity granularity 2: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400575 battery->capacity_granularity_2,
576 acpi_battery_units(battery));
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400577 seq_printf(seq, "model number: %s\n", battery->model_number);
578 seq_printf(seq, "serial number: %s\n", battery->serial_number);
579 seq_printf(seq, "battery type: %s\n", battery->type);
580 seq_printf(seq, "OEM info: %s\n", battery->oem_info);
Len Brown4be44fc2005-08-05 00:44:28 -0400581 end:
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300582 if (result)
583 seq_printf(seq, "ERROR: Unable to read battery info\n");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300584 return result;
585}
586
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400587static int acpi_battery_print_state(struct seq_file *seq, int result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200589 struct acpi_battery *battery = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300591 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 goto end;
593
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400594 seq_printf(seq, "present: %s\n",
595 acpi_battery_present(battery)?"yes":"no");
596 if (!acpi_battery_present(battery))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400599 seq_printf(seq, "capacity state: %s\n",
600 (battery->state & 0x04)?"critical":"ok");
601 if ((battery->state & 0x01) && (battery->state & 0x02))
Len Brown4be44fc2005-08-05 00:44:28 -0400602 seq_printf(seq,
603 "charging state: charging/discharging\n");
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400604 else if (battery->state & 0x01)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 seq_printf(seq, "charging state: discharging\n");
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400606 else if (battery->state & 0x02)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 seq_printf(seq, "charging state: charging\n");
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400608 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 seq_printf(seq, "charging state: charged\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610
Alexey Starikovskiy7faa1442009-03-27 22:23:52 -0400611 if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 seq_printf(seq, "present rate: unknown\n");
613 else
614 seq_printf(seq, "present rate: %d %s\n",
Alexey Starikovskiy7faa1442009-03-27 22:23:52 -0400615 battery->rate_now, acpi_battery_units(battery));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400617 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 seq_printf(seq, "remaining capacity: unknown\n");
619 else
620 seq_printf(seq, "remaining capacity: %d %sh\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400621 battery->capacity_now, acpi_battery_units(battery));
622 if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 seq_printf(seq, "present voltage: unknown\n");
624 else
625 seq_printf(seq, "present voltage: %d mV\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400626 battery->voltage_now);
Len Brown4be44fc2005-08-05 00:44:28 -0400627 end:
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400628 if (result)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300629 seq_printf(seq, "ERROR: Unable to read battery state\n");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300630
631 return result;
632}
633
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400634static int acpi_battery_print_alarm(struct seq_file *seq, int result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200636 struct acpi_battery *battery = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300638 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 goto end;
640
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300641 if (!acpi_battery_present(battery)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 seq_printf(seq, "present: no\n");
643 goto end;
644 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 seq_printf(seq, "alarm: ");
646 if (!battery->alarm)
647 seq_printf(seq, "unsupported\n");
648 else
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400649 seq_printf(seq, "%u %sh\n", battery->alarm,
650 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400651 end:
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300652 if (result)
653 seq_printf(seq, "ERROR: Unable to read battery alarm\n");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300654 return result;
655}
656
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400657static ssize_t acpi_battery_write_alarm(struct file *file,
658 const char __user * buffer,
659 size_t count, loff_t * ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660{
Len Brown4be44fc2005-08-05 00:44:28 -0400661 int result = 0;
662 char alarm_string[12] = { '\0' };
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200663 struct seq_file *m = file->private_data;
664 struct acpi_battery *battery = m->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 if (!battery || (count > sizeof(alarm_string) - 1))
Patrick Mocheld550d982006-06-27 00:41:40 -0400667 return -EINVAL;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300668 if (!acpi_battery_present(battery)) {
669 result = -ENODEV;
670 goto end;
671 }
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300672 if (copy_from_user(alarm_string, buffer, count)) {
673 result = -EFAULT;
674 goto end;
675 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 alarm_string[count] = '\0';
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400677 battery->alarm = simple_strtol(alarm_string, NULL, 0);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400678 result = acpi_battery_set_alarm(battery);
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300679 end:
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300680 if (!result)
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400681 return count;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300682 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683}
684
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400685typedef int(*print_func)(struct seq_file *seq, int result);
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400686
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400687static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = {
688 acpi_battery_print_info,
689 acpi_battery_print_state,
690 acpi_battery_print_alarm,
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400691};
692
693static int acpi_battery_read(int fid, struct seq_file *seq)
694{
695 struct acpi_battery *battery = seq->private;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400696 int result = acpi_battery_update(battery);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400697 return acpi_print_funcs[fid](seq, result);
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400698}
699
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400700#define DECLARE_FILE_FUNCTIONS(_name) \
701static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \
702{ \
703 return acpi_battery_read(_name##_tag, seq); \
704} \
705static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \
706{ \
707 return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400708}
709
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400710DECLARE_FILE_FUNCTIONS(info);
711DECLARE_FILE_FUNCTIONS(state);
712DECLARE_FILE_FUNCTIONS(alarm);
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400713
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400714#undef DECLARE_FILE_FUNCTIONS
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400715
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400716#define FILE_DESCRIPTION_RO(_name) \
717 { \
718 .name = __stringify(_name), \
719 .mode = S_IRUGO, \
720 .ops = { \
721 .open = acpi_battery_##_name##_open_fs, \
722 .read = seq_read, \
723 .llseek = seq_lseek, \
724 .release = single_release, \
725 .owner = THIS_MODULE, \
726 }, \
727 }
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400728
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400729#define FILE_DESCRIPTION_RW(_name) \
730 { \
731 .name = __stringify(_name), \
732 .mode = S_IFREG | S_IRUGO | S_IWUSR, \
733 .ops = { \
734 .open = acpi_battery_##_name##_open_fs, \
735 .read = seq_read, \
736 .llseek = seq_lseek, \
737 .write = acpi_battery_write_##_name, \
738 .release = single_release, \
739 .owner = THIS_MODULE, \
740 }, \
741 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400743static struct battery_file {
744 struct file_operations ops;
745 mode_t mode;
Jan Engelhardt070d8eb2009-01-12 00:07:55 +0100746 const char *name;
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400747} acpi_battery_file[] = {
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400748 FILE_DESCRIPTION_RO(info),
749 FILE_DESCRIPTION_RO(state),
750 FILE_DESCRIPTION_RW(alarm),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751};
752
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400753#undef FILE_DESCRIPTION_RO
754#undef FILE_DESCRIPTION_RW
755
Len Brown4be44fc2005-08-05 00:44:28 -0400756static int acpi_battery_add_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757{
Len Brown4be44fc2005-08-05 00:44:28 -0400758 struct proc_dir_entry *entry = NULL;
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400759 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 if (!acpi_device_dir(device)) {
762 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
Len Brown4be44fc2005-08-05 00:44:28 -0400763 acpi_battery_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 if (!acpi_device_dir(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400765 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 }
767
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400768 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700769 entry = proc_create_data(acpi_battery_file[i].name,
770 acpi_battery_file[i].mode,
771 acpi_device_dir(device),
772 &acpi_battery_file[i].ops,
773 acpi_driver_data(device));
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400774 if (!entry)
775 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 }
Patrick Mocheld550d982006-06-27 00:41:40 -0400777 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778}
779
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400780static void acpi_battery_remove_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781{
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400782 int i;
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400783 if (!acpi_device_dir(device))
784 return;
785 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i)
786 remove_proc_entry(acpi_battery_file[i].name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 acpi_device_dir(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400789 remove_proc_entry(acpi_device_bid(device), acpi_battery_dir);
790 acpi_device_dir(device) = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791}
792
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400793#endif
Alexey Starikovskiy3e58ea02007-09-26 19:43:11 +0400794
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795/* --------------------------------------------------------------------------
796 Driver Interface
797 -------------------------------------------------------------------------- */
798
Bjorn Helgaasd9406692009-04-30 09:35:47 -0600799static void acpi_battery_notify(struct acpi_device *device, u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800{
Bjorn Helgaasd9406692009-04-30 09:35:47 -0600801 struct acpi_battery *battery = acpi_driver_data(device);
802
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 if (!battery)
Patrick Mocheld550d982006-06-27 00:41:40 -0400804 return;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400805 acpi_battery_update(battery);
806 acpi_bus_generate_proc_event(device, event,
807 acpi_battery_present(battery));
808 acpi_bus_generate_netlink_event(device->pnp.device_class,
Kay Sievers07944692008-10-30 01:18:59 +0100809 dev_name(&device->dev), event,
Vladimir Lebedev9ea7d572007-02-20 15:48:06 +0300810 acpi_battery_present(battery));
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500811#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300812 /* acpi_batter_update could remove power_supply object */
813 if (battery->bat.dev)
814 kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500815#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816}
817
Len Brown4be44fc2005-08-05 00:44:28 -0400818static int acpi_battery_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819{
Len Brown4be44fc2005-08-05 00:44:28 -0400820 int result = 0;
Len Brown4be44fc2005-08-05 00:44:28 -0400821 struct acpi_battery *battery = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -0400823 return -EINVAL;
Burman Yan36bcbec2006-12-19 12:56:11 -0800824 battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 if (!battery)
Patrick Mocheld550d982006-06-27 00:41:40 -0400826 return -ENOMEM;
Patrick Mochel145def82006-05-19 16:54:39 -0400827 battery->device = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
829 strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
Pavel Machekdb89b4f2008-09-22 14:37:34 -0700830 device->driver_data = battery;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400831 mutex_init(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400832 acpi_battery_update(battery);
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300833#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 result = acpi_battery_add_fs(device);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400835#endif
Len Brown586caae2009-06-18 00:38:27 -0400836 if (!result) {
837 printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
838 ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
839 device->status.battery_present ? "present" : "absent");
840 } else {
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300841#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 acpi_battery_remove_fs(device);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400843#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 kfree(battery);
845 }
Patrick Mocheld550d982006-06-27 00:41:40 -0400846 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847}
848
Len Brown4be44fc2005-08-05 00:44:28 -0400849static int acpi_battery_remove(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850{
Len Brown4be44fc2005-08-05 00:44:28 -0400851 struct acpi_battery *battery = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400854 return -EINVAL;
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200855 battery = acpi_driver_data(device);
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300856#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 acpi_battery_remove_fs(device);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400858#endif
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500859#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300860 sysfs_remove_battery(battery);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500861#endif
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400862 mutex_destroy(&battery->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 kfree(battery);
Patrick Mocheld550d982006-06-27 00:41:40 -0400864 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865}
866
Jiri Kosina34c44152006-10-10 14:20:41 -0700867/* this is needed to learn about changes made in suspended state */
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800868static int acpi_battery_resume(struct acpi_device *device)
Jiri Kosina34c44152006-10-10 14:20:41 -0700869{
870 struct acpi_battery *battery;
Jiri Kosina34c44152006-10-10 14:20:41 -0700871 if (!device)
872 return -EINVAL;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400873 battery = acpi_driver_data(device);
874 battery->update_time = 0;
Andrey Borzenkov508df922007-10-28 12:50:09 +0300875 acpi_battery_update(battery);
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300876 return 0;
Jiri Kosina34c44152006-10-10 14:20:41 -0700877}
878
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400879static struct acpi_driver acpi_battery_driver = {
880 .name = "battery",
881 .class = ACPI_BATTERY_CLASS,
882 .ids = battery_device_ids,
Bjorn Helgaasd9406692009-04-30 09:35:47 -0600883 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400884 .ops = {
885 .add = acpi_battery_add,
886 .resume = acpi_battery_resume,
887 .remove = acpi_battery_remove,
Bjorn Helgaasd9406692009-04-30 09:35:47 -0600888 .notify = acpi_battery_notify,
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400889 },
890};
891
Linus Torvaldsb0cbc862009-04-11 12:45:20 -0700892static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893{
Pavel Machek4d8316d2006-08-14 22:37:22 -0700894 if (acpi_disabled)
Arjan van de Ven0f66af52009-01-10 14:19:05 -0500895 return;
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300896#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400897 acpi_battery_dir = acpi_lock_battery_dir();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 if (!acpi_battery_dir)
Arjan van de Ven0f66af52009-01-10 14:19:05 -0500899 return;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400900#endif
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400901 if (acpi_bus_register_driver(&acpi_battery_driver) < 0) {
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300902#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400903 acpi_unlock_battery_dir(acpi_battery_dir);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400904#endif
Arjan van de Ven0f66af52009-01-10 14:19:05 -0500905 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 }
Arjan van de Ven0f66af52009-01-10 14:19:05 -0500907 return;
908}
909
910static int __init acpi_battery_init(void)
911{
912 async_schedule(acpi_battery_init_async, NULL);
Patrick Mocheld550d982006-06-27 00:41:40 -0400913 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914}
915
Len Brown4be44fc2005-08-05 00:44:28 -0400916static void __exit acpi_battery_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 acpi_bus_unregister_driver(&acpi_battery_driver);
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300919#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400920 acpi_unlock_battery_dir(acpi_battery_dir);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400921#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922}
923
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924module_init(acpi_battery_init);
925module_exit(acpi_battery_exit);