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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>
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040033
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030034#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <linux/proc_fs.h>
36#include <linux/seq_file.h>
37#include <asm/uaccess.h>
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040038#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
40#include <acpi/acpi_bus.h>
41#include <acpi/acpi_drivers.h>
42
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050043#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040044#include <linux/power_supply.h>
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050045#endif
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040046
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
48
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#define ACPI_BATTERY_COMPONENT 0x00040000
50#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 Starikovskiyd7380962007-09-26 19:43:04 +040096 int current_now;
97 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
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400142static int acpi_battery_get_property(struct power_supply *psy,
143 enum power_supply_property psp,
144 union power_supply_propval *val)
145{
146 struct acpi_battery *battery = to_acpi_battery(psy);
147
Alexey Starikovskiy91044762007-11-13 12:23:06 +0300148 if (acpi_battery_present(battery)) {
149 /* run battery update only if it is present */
150 acpi_battery_get_state(battery);
151 } else if (psp != POWER_SUPPLY_PROP_PRESENT)
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400152 return -ENODEV;
153 switch (psp) {
154 case POWER_SUPPLY_PROP_STATUS:
155 if (battery->state & 0x01)
156 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
157 else if (battery->state & 0x02)
158 val->intval = POWER_SUPPLY_STATUS_CHARGING;
159 else if (battery->state == 0)
160 val->intval = POWER_SUPPLY_STATUS_FULL;
Roland Dreier4c41d3a2007-11-07 15:09:09 -0800161 else
162 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400163 break;
164 case POWER_SUPPLY_PROP_PRESENT:
165 val->intval = acpi_battery_present(battery);
166 break;
167 case POWER_SUPPLY_PROP_TECHNOLOGY:
168 val->intval = acpi_battery_technology(battery);
169 break;
170 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
171 val->intval = battery->design_voltage * 1000;
172 break;
173 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
174 val->intval = battery->voltage_now * 1000;
175 break;
176 case POWER_SUPPLY_PROP_CURRENT_NOW:
177 val->intval = battery->current_now * 1000;
178 break;
179 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
180 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
181 val->intval = battery->design_capacity * 1000;
182 break;
183 case POWER_SUPPLY_PROP_CHARGE_FULL:
184 case POWER_SUPPLY_PROP_ENERGY_FULL:
185 val->intval = battery->full_charge_capacity * 1000;
186 break;
187 case POWER_SUPPLY_PROP_CHARGE_NOW:
188 case POWER_SUPPLY_PROP_ENERGY_NOW:
189 val->intval = battery->capacity_now * 1000;
190 break;
191 case POWER_SUPPLY_PROP_MODEL_NAME:
192 val->strval = battery->model_number;
193 break;
194 case POWER_SUPPLY_PROP_MANUFACTURER:
195 val->strval = battery->oem_info;
196 break;
maximilian attems7c2670b2008-01-22 18:46:50 +0100197 case POWER_SUPPLY_PROP_SERIAL_NUMBER:
198 val->strval = battery->serial_number;
199 break;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400200 default:
201 return -EINVAL;
202 }
203 return 0;
204}
205
206static enum power_supply_property charge_battery_props[] = {
207 POWER_SUPPLY_PROP_STATUS,
208 POWER_SUPPLY_PROP_PRESENT,
209 POWER_SUPPLY_PROP_TECHNOLOGY,
210 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
211 POWER_SUPPLY_PROP_VOLTAGE_NOW,
212 POWER_SUPPLY_PROP_CURRENT_NOW,
213 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
214 POWER_SUPPLY_PROP_CHARGE_FULL,
215 POWER_SUPPLY_PROP_CHARGE_NOW,
216 POWER_SUPPLY_PROP_MODEL_NAME,
217 POWER_SUPPLY_PROP_MANUFACTURER,
maximilian attems7c2670b2008-01-22 18:46:50 +0100218 POWER_SUPPLY_PROP_SERIAL_NUMBER,
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400219};
220
221static enum power_supply_property energy_battery_props[] = {
222 POWER_SUPPLY_PROP_STATUS,
223 POWER_SUPPLY_PROP_PRESENT,
224 POWER_SUPPLY_PROP_TECHNOLOGY,
225 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
226 POWER_SUPPLY_PROP_VOLTAGE_NOW,
227 POWER_SUPPLY_PROP_CURRENT_NOW,
228 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
229 POWER_SUPPLY_PROP_ENERGY_FULL,
230 POWER_SUPPLY_PROP_ENERGY_NOW,
231 POWER_SUPPLY_PROP_MODEL_NAME,
232 POWER_SUPPLY_PROP_MANUFACTURER,
maximilian attems7c2670b2008-01-22 18:46:50 +0100233 POWER_SUPPLY_PROP_SERIAL_NUMBER,
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400234};
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500235#endif
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400236
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300237#ifdef CONFIG_ACPI_PROCFS_POWER
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400238inline char *acpi_battery_units(struct acpi_battery *battery)
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400239{
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400240 return (battery->power_unit)?"mA":"mW";
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400241}
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400242#endif
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300243
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244/* --------------------------------------------------------------------------
245 Battery Management
246 -------------------------------------------------------------------------- */
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400247struct acpi_offsets {
248 size_t offset; /* offset inside struct acpi_sbs_battery */
249 u8 mode; /* int or string? */
250};
251
252static struct acpi_offsets state_offsets[] = {
253 {offsetof(struct acpi_battery, state), 0},
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400254 {offsetof(struct acpi_battery, current_now), 0},
255 {offsetof(struct acpi_battery, capacity_now), 0},
256 {offsetof(struct acpi_battery, voltage_now), 0},
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400257};
258
259static struct acpi_offsets info_offsets[] = {
260 {offsetof(struct acpi_battery, power_unit), 0},
261 {offsetof(struct acpi_battery, design_capacity), 0},
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400262 {offsetof(struct acpi_battery, full_charge_capacity), 0},
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400263 {offsetof(struct acpi_battery, technology), 0},
264 {offsetof(struct acpi_battery, design_voltage), 0},
265 {offsetof(struct acpi_battery, design_capacity_warning), 0},
266 {offsetof(struct acpi_battery, design_capacity_low), 0},
267 {offsetof(struct acpi_battery, capacity_granularity_1), 0},
268 {offsetof(struct acpi_battery, capacity_granularity_2), 0},
269 {offsetof(struct acpi_battery, model_number), 1},
270 {offsetof(struct acpi_battery, serial_number), 1},
271 {offsetof(struct acpi_battery, type), 1},
272 {offsetof(struct acpi_battery, oem_info), 1},
273};
274
275static int extract_package(struct acpi_battery *battery,
276 union acpi_object *package,
277 struct acpi_offsets *offsets, int num)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300278{
Alexey Starikovskiy106449e2007-10-29 23:29:40 +0300279 int i;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400280 union acpi_object *element;
281 if (package->type != ACPI_TYPE_PACKAGE)
282 return -EFAULT;
283 for (i = 0; i < num; ++i) {
284 if (package->package.count <= i)
285 return -EFAULT;
286 element = &package->package.elements[i];
287 if (offsets[i].mode) {
Alexey Starikovskiy106449e2007-10-29 23:29:40 +0300288 u8 *ptr = (u8 *)battery + offsets[i].offset;
289 if (element->type == ACPI_TYPE_STRING ||
290 element->type == ACPI_TYPE_BUFFER)
291 strncpy(ptr, element->string.pointer, 32);
292 else if (element->type == ACPI_TYPE_INTEGER) {
293 strncpy(ptr, (u8 *)&element->integer.value,
294 sizeof(acpi_integer));
295 ptr[sizeof(acpi_integer)] = 0;
Alexey Starikovskiyb8a1bdb2008-03-17 22:37:42 -0400296 } else
297 *ptr = 0; /* don't have value */
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400298 } else {
Alexey Starikovskiyb8a1bdb2008-03-17 22:37:42 -0400299 int *x = (int *)((u8 *)battery + offsets[i].offset);
300 *x = (element->type == ACPI_TYPE_INTEGER) ?
301 element->integer.value : -1;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300302 }
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300303 }
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300304 return 0;
305}
306
307static int acpi_battery_get_status(struct acpi_battery *battery)
308{
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400309 if (acpi_bus_get_status(battery->device)) {
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300310 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA"));
311 return -ENODEV;
312 }
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400313 return 0;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300314}
315
316static int acpi_battery_get_info(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317{
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400318 int result = -EFAULT;
Len Brown4be44fc2005-08-05 00:44:28 -0400319 acpi_status status = 0;
320 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300322 if (!acpi_battery_present(battery))
323 return 0;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400324 mutex_lock(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400325 status = acpi_evaluate_object(battery->device->handle, "_BIF",
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400326 NULL, &buffer);
327 mutex_unlock(&battery->lock);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400328
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 if (ACPI_FAILURE(status)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400330 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400331 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 }
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400333
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400334 result = extract_package(battery, buffer.pointer,
335 info_offsets, ARRAY_SIZE(info_offsets));
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400336 kfree(buffer.pointer);
Patrick Mocheld550d982006-06-27 00:41:40 -0400337 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338}
339
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300340static int acpi_battery_get_state(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341{
Len Brown4be44fc2005-08-05 00:44:28 -0400342 int result = 0;
343 acpi_status status = 0;
344 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300346 if (!acpi_battery_present(battery))
347 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400349 if (battery->update_time &&
350 time_before(jiffies, battery->update_time +
351 msecs_to_jiffies(cache_time)))
352 return 0;
353
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400354 mutex_lock(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400355 status = acpi_evaluate_object(battery->device->handle, "_BST",
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400356 NULL, &buffer);
357 mutex_unlock(&battery->lock);
Len Brown5b31d892007-08-15 00:19:26 -0400358
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 if (ACPI_FAILURE(status)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400360 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400361 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 }
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400363
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400364 result = extract_package(battery, buffer.pointer,
365 state_offsets, ARRAY_SIZE(state_offsets));
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400366 battery->update_time = jiffies;
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400367 kfree(buffer.pointer);
Patrick Mocheld550d982006-06-27 00:41:40 -0400368 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369}
370
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400371static int acpi_battery_set_alarm(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372{
Len Brown4be44fc2005-08-05 00:44:28 -0400373 acpi_status status = 0;
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400374 union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER };
Len Brown4be44fc2005-08-05 00:44:28 -0400375 struct acpi_object_list arg_list = { 1, &arg0 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400377 if (!acpi_battery_present(battery)|| !battery->alarm_present)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300378 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400380 arg0.integer.value = battery->alarm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400382 mutex_lock(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400383 status = acpi_evaluate_object(battery->device->handle, "_BTP",
384 &arg_list, NULL);
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400385 mutex_unlock(&battery->lock);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400386
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400388 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400390 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm));
Patrick Mocheld550d982006-06-27 00:41:40 -0400391 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392}
393
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300394static int acpi_battery_init_alarm(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395{
Len Brown4be44fc2005-08-05 00:44:28 -0400396 acpi_status status = AE_OK;
397 acpi_handle handle = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300399 /* See if alarms are supported, and if so, set default */
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400400 status = acpi_get_handle(battery->device->handle, "_BTP", &handle);
401 if (ACPI_FAILURE(status)) {
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400402 battery->alarm_present = 0;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400403 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 }
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400405 battery->alarm_present = 1;
406 if (!battery->alarm)
407 battery->alarm = battery->design_capacity_warning;
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400408 return acpi_battery_set_alarm(battery);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409}
410
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500411#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300412static ssize_t acpi_battery_alarm_show(struct device *dev,
413 struct device_attribute *attr,
414 char *buf)
415{
416 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
417 return sprintf(buf, "%d\n", battery->alarm * 1000);
418}
419
420static ssize_t acpi_battery_alarm_store(struct device *dev,
421 struct device_attribute *attr,
422 const char *buf, size_t count)
423{
424 unsigned long x;
425 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
426 if (sscanf(buf, "%ld\n", &x) == 1)
427 battery->alarm = x/1000;
428 if (acpi_battery_present(battery))
429 acpi_battery_set_alarm(battery);
430 return count;
431}
432
433static struct device_attribute alarm_attr = {
434 .attr = {.name = "alarm", .mode = 0644, .owner = THIS_MODULE},
435 .show = acpi_battery_alarm_show,
436 .store = acpi_battery_alarm_store,
437};
438
439static int sysfs_add_battery(struct acpi_battery *battery)
440{
441 int result;
442
Andrey Borzenkov508df922007-10-28 12:50:09 +0300443 if (battery->power_unit) {
444 battery->bat.properties = charge_battery_props;
445 battery->bat.num_properties =
446 ARRAY_SIZE(charge_battery_props);
447 } else {
448 battery->bat.properties = energy_battery_props;
449 battery->bat.num_properties =
450 ARRAY_SIZE(energy_battery_props);
451 }
452
453 battery->bat.name = acpi_device_bid(battery->device);
454 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
455 battery->bat.get_property = acpi_battery_get_property;
456
457 result = power_supply_register(&battery->device->dev, &battery->bat);
458 if (result)
459 return result;
460 return device_create_file(battery->bat.dev, &alarm_attr);
461}
462
463static void sysfs_remove_battery(struct acpi_battery *battery)
464{
465 if (!battery->bat.dev)
466 return;
467 device_remove_file(battery->bat.dev, &alarm_attr);
468 power_supply_unregister(&battery->bat);
Alexey Starikovskiy91044762007-11-13 12:23:06 +0300469 battery->bat.dev = NULL;
Andrey Borzenkov508df922007-10-28 12:50:09 +0300470}
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500471#endif
Andrey Borzenkov508df922007-10-28 12:50:09 +0300472
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400473static int acpi_battery_update(struct acpi_battery *battery)
Vladimir Lebedev4bd35cd2007-02-10 01:43:48 -0500474{
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500475 int result;
476 result = acpi_battery_get_status(battery);
Andrey Borzenkov508df922007-10-28 12:50:09 +0300477 if (result)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300478 return result;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500479#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300480 if (!acpi_battery_present(battery)) {
481 sysfs_remove_battery(battery);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500482 battery->update_time = 0;
Andrey Borzenkov508df922007-10-28 12:50:09 +0300483 return 0;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300484 }
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500485#endif
486 if (!battery->update_time) {
487 result = acpi_battery_get_info(battery);
488 if (result)
489 return result;
490 acpi_battery_init_alarm(battery);
491 }
492#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300493 if (!battery->bat.dev)
494 sysfs_add_battery(battery);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500495#endif
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400496 return acpi_battery_get_state(battery);
Vladimir Lebedev4bd35cd2007-02-10 01:43:48 -0500497}
498
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499/* --------------------------------------------------------------------------
500 FS Interface (/proc)
501 -------------------------------------------------------------------------- */
502
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300503#ifdef CONFIG_ACPI_PROCFS_POWER
Len Brown4be44fc2005-08-05 00:44:28 -0400504static struct proc_dir_entry *acpi_battery_dir;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300505
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400506static int acpi_battery_print_info(struct seq_file *seq, int result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200508 struct acpi_battery *battery = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300510 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 goto end;
512
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400513 seq_printf(seq, "present: %s\n",
514 acpi_battery_present(battery)?"yes":"no");
515 if (!acpi_battery_present(battery))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 goto end;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400517 if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 seq_printf(seq, "design capacity: unknown\n");
519 else
520 seq_printf(seq, "design capacity: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400521 battery->design_capacity,
522 acpi_battery_units(battery));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400524 if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 seq_printf(seq, "last full capacity: unknown\n");
526 else
527 seq_printf(seq, "last full capacity: %d %sh\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400528 battery->full_charge_capacity,
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400529 acpi_battery_units(battery));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400531 seq_printf(seq, "battery technology: %srechargeable\n",
532 (!battery->technology)?"non-":"");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400534 if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 seq_printf(seq, "design voltage: unknown\n");
536 else
537 seq_printf(seq, "design voltage: %d mV\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400538 battery->design_voltage);
Len Brown4be44fc2005-08-05 00:44:28 -0400539 seq_printf(seq, "design capacity warning: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400540 battery->design_capacity_warning,
541 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400542 seq_printf(seq, "design capacity low: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400543 battery->design_capacity_low,
544 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400545 seq_printf(seq, "capacity granularity 1: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400546 battery->capacity_granularity_1,
547 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400548 seq_printf(seq, "capacity granularity 2: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400549 battery->capacity_granularity_2,
550 acpi_battery_units(battery));
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400551 seq_printf(seq, "model number: %s\n", battery->model_number);
552 seq_printf(seq, "serial number: %s\n", battery->serial_number);
553 seq_printf(seq, "battery type: %s\n", battery->type);
554 seq_printf(seq, "OEM info: %s\n", battery->oem_info);
Len Brown4be44fc2005-08-05 00:44:28 -0400555 end:
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300556 if (result)
557 seq_printf(seq, "ERROR: Unable to read battery info\n");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300558 return result;
559}
560
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400561static int acpi_battery_print_state(struct seq_file *seq, int result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200563 struct acpi_battery *battery = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300565 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 goto end;
567
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400568 seq_printf(seq, "present: %s\n",
569 acpi_battery_present(battery)?"yes":"no");
570 if (!acpi_battery_present(battery))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400573 seq_printf(seq, "capacity state: %s\n",
574 (battery->state & 0x04)?"critical":"ok");
575 if ((battery->state & 0x01) && (battery->state & 0x02))
Len Brown4be44fc2005-08-05 00:44:28 -0400576 seq_printf(seq,
577 "charging state: charging/discharging\n");
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400578 else if (battery->state & 0x01)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 seq_printf(seq, "charging state: discharging\n");
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400580 else if (battery->state & 0x02)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 seq_printf(seq, "charging state: charging\n");
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400582 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 seq_printf(seq, "charging state: charged\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400585 if (battery->current_now == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 seq_printf(seq, "present rate: unknown\n");
587 else
588 seq_printf(seq, "present rate: %d %s\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400589 battery->current_now, acpi_battery_units(battery));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400591 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 seq_printf(seq, "remaining capacity: unknown\n");
593 else
594 seq_printf(seq, "remaining capacity: %d %sh\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400595 battery->capacity_now, acpi_battery_units(battery));
596 if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 seq_printf(seq, "present voltage: unknown\n");
598 else
599 seq_printf(seq, "present voltage: %d mV\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400600 battery->voltage_now);
Len Brown4be44fc2005-08-05 00:44:28 -0400601 end:
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400602 if (result)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300603 seq_printf(seq, "ERROR: Unable to read battery state\n");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300604
605 return result;
606}
607
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400608static int acpi_battery_print_alarm(struct seq_file *seq, int result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200610 struct acpi_battery *battery = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300612 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 goto end;
614
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300615 if (!acpi_battery_present(battery)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 seq_printf(seq, "present: no\n");
617 goto end;
618 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 seq_printf(seq, "alarm: ");
620 if (!battery->alarm)
621 seq_printf(seq, "unsupported\n");
622 else
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400623 seq_printf(seq, "%u %sh\n", battery->alarm,
624 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400625 end:
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300626 if (result)
627 seq_printf(seq, "ERROR: Unable to read battery alarm\n");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300628 return result;
629}
630
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400631static ssize_t acpi_battery_write_alarm(struct file *file,
632 const char __user * buffer,
633 size_t count, loff_t * ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634{
Len Brown4be44fc2005-08-05 00:44:28 -0400635 int result = 0;
636 char alarm_string[12] = { '\0' };
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200637 struct seq_file *m = file->private_data;
638 struct acpi_battery *battery = m->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 if (!battery || (count > sizeof(alarm_string) - 1))
Patrick Mocheld550d982006-06-27 00:41:40 -0400641 return -EINVAL;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300642 if (!acpi_battery_present(battery)) {
643 result = -ENODEV;
644 goto end;
645 }
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300646 if (copy_from_user(alarm_string, buffer, count)) {
647 result = -EFAULT;
648 goto end;
649 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 alarm_string[count] = '\0';
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400651 battery->alarm = simple_strtol(alarm_string, NULL, 0);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400652 result = acpi_battery_set_alarm(battery);
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300653 end:
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300654 if (!result)
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400655 return count;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300656 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657}
658
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400659typedef int(*print_func)(struct seq_file *seq, int result);
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400660
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400661static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = {
662 acpi_battery_print_info,
663 acpi_battery_print_state,
664 acpi_battery_print_alarm,
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400665};
666
667static int acpi_battery_read(int fid, struct seq_file *seq)
668{
669 struct acpi_battery *battery = seq->private;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400670 int result = acpi_battery_update(battery);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400671 return acpi_print_funcs[fid](seq, result);
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400672}
673
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400674#define DECLARE_FILE_FUNCTIONS(_name) \
675static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \
676{ \
677 return acpi_battery_read(_name##_tag, seq); \
678} \
679static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \
680{ \
681 return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400682}
683
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400684DECLARE_FILE_FUNCTIONS(info);
685DECLARE_FILE_FUNCTIONS(state);
686DECLARE_FILE_FUNCTIONS(alarm);
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400687
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400688#undef DECLARE_FILE_FUNCTIONS
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400689
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400690#define FILE_DESCRIPTION_RO(_name) \
691 { \
692 .name = __stringify(_name), \
693 .mode = S_IRUGO, \
694 .ops = { \
695 .open = acpi_battery_##_name##_open_fs, \
696 .read = seq_read, \
697 .llseek = seq_lseek, \
698 .release = single_release, \
699 .owner = THIS_MODULE, \
700 }, \
701 }
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400702
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400703#define FILE_DESCRIPTION_RW(_name) \
704 { \
705 .name = __stringify(_name), \
706 .mode = S_IFREG | S_IRUGO | S_IWUSR, \
707 .ops = { \
708 .open = acpi_battery_##_name##_open_fs, \
709 .read = seq_read, \
710 .llseek = seq_lseek, \
711 .write = acpi_battery_write_##_name, \
712 .release = single_release, \
713 .owner = THIS_MODULE, \
714 }, \
715 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400717static struct battery_file {
718 struct file_operations ops;
719 mode_t mode;
720 char *name;
721} acpi_battery_file[] = {
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400722 FILE_DESCRIPTION_RO(info),
723 FILE_DESCRIPTION_RO(state),
724 FILE_DESCRIPTION_RW(alarm),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725};
726
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400727#undef FILE_DESCRIPTION_RO
728#undef FILE_DESCRIPTION_RW
729
Len Brown4be44fc2005-08-05 00:44:28 -0400730static int acpi_battery_add_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731{
Len Brown4be44fc2005-08-05 00:44:28 -0400732 struct proc_dir_entry *entry = NULL;
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400733 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 if (!acpi_device_dir(device)) {
736 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
Len Brown4be44fc2005-08-05 00:44:28 -0400737 acpi_battery_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 if (!acpi_device_dir(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400739 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 acpi_device_dir(device)->owner = THIS_MODULE;
741 }
742
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400743 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700744 entry = proc_create_data(acpi_battery_file[i].name,
745 acpi_battery_file[i].mode,
746 acpi_device_dir(device),
747 &acpi_battery_file[i].ops,
748 acpi_driver_data(device));
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400749 if (!entry)
750 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 }
Patrick Mocheld550d982006-06-27 00:41:40 -0400752 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753}
754
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400755static void acpi_battery_remove_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756{
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400757 int i;
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400758 if (!acpi_device_dir(device))
759 return;
760 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i)
761 remove_proc_entry(acpi_battery_file[i].name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 acpi_device_dir(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400764 remove_proc_entry(acpi_device_bid(device), acpi_battery_dir);
765 acpi_device_dir(device) = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766}
767
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400768#endif
Alexey Starikovskiy3e58ea02007-09-26 19:43:11 +0400769
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770/* --------------------------------------------------------------------------
771 Driver Interface
772 -------------------------------------------------------------------------- */
773
Len Brown4be44fc2005-08-05 00:44:28 -0400774static void acpi_battery_notify(acpi_handle handle, u32 event, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200776 struct acpi_battery *battery = data;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400777 struct acpi_device *device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 if (!battery)
Patrick Mocheld550d982006-06-27 00:41:40 -0400779 return;
Patrick Mochel145def82006-05-19 16:54:39 -0400780 device = battery->device;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400781 acpi_battery_update(battery);
782 acpi_bus_generate_proc_event(device, event,
783 acpi_battery_present(battery));
784 acpi_bus_generate_netlink_event(device->pnp.device_class,
785 device->dev.bus_id, event,
Vladimir Lebedev9ea7d572007-02-20 15:48:06 +0300786 acpi_battery_present(battery));
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500787#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300788 /* acpi_batter_update could remove power_supply object */
789 if (battery->bat.dev)
790 kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500791#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792}
793
Len Brown4be44fc2005-08-05 00:44:28 -0400794static int acpi_battery_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795{
Len Brown4be44fc2005-08-05 00:44:28 -0400796 int result = 0;
797 acpi_status status = 0;
798 struct acpi_battery *battery = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -0400800 return -EINVAL;
Burman Yan36bcbec2006-12-19 12:56:11 -0800801 battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 if (!battery)
Patrick Mocheld550d982006-06-27 00:41:40 -0400803 return -ENOMEM;
Patrick Mochel145def82006-05-19 16:54:39 -0400804 battery->device = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
806 strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
807 acpi_driver_data(device) = battery;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400808 mutex_init(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400809 acpi_battery_update(battery);
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300810#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 result = acpi_battery_add_fs(device);
812 if (result)
813 goto end;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400814#endif
Patrick Mochel3b073ec2006-05-19 16:54:41 -0400815 status = acpi_install_notify_handler(device->handle,
Vladimir Lebedev9fdae722006-06-27 04:49:00 -0400816 ACPI_ALL_NOTIFY,
Len Brown4be44fc2005-08-05 00:44:28 -0400817 acpi_battery_notify, battery);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 if (ACPI_FAILURE(status)) {
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300819 ACPI_EXCEPTION((AE_INFO, status, "Installing notify handler"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 result = -ENODEV;
821 goto end;
822 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400824 ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
825 device->status.battery_present ? "present" : "absent");
Len Brown4be44fc2005-08-05 00:44:28 -0400826 end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827 if (result) {
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300828#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 acpi_battery_remove_fs(device);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400830#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 kfree(battery);
832 }
Patrick Mocheld550d982006-06-27 00:41:40 -0400833 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834}
835
Len Brown4be44fc2005-08-05 00:44:28 -0400836static int acpi_battery_remove(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837{
Len Brown4be44fc2005-08-05 00:44:28 -0400838 acpi_status status = 0;
839 struct acpi_battery *battery = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400842 return -EINVAL;
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200843 battery = acpi_driver_data(device);
Patrick Mochel3b073ec2006-05-19 16:54:41 -0400844 status = acpi_remove_notify_handler(device->handle,
Vladimir Lebedev9fdae722006-06-27 04:49:00 -0400845 ACPI_ALL_NOTIFY,
Len Brown4be44fc2005-08-05 00:44:28 -0400846 acpi_battery_notify);
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300847#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 acpi_battery_remove_fs(device);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400849#endif
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500850#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300851 sysfs_remove_battery(battery);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500852#endif
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400853 mutex_destroy(&battery->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854 kfree(battery);
Patrick Mocheld550d982006-06-27 00:41:40 -0400855 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856}
857
Jiri Kosina34c44152006-10-10 14:20:41 -0700858/* this is needed to learn about changes made in suspended state */
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800859static int acpi_battery_resume(struct acpi_device *device)
Jiri Kosina34c44152006-10-10 14:20:41 -0700860{
861 struct acpi_battery *battery;
Jiri Kosina34c44152006-10-10 14:20:41 -0700862 if (!device)
863 return -EINVAL;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400864 battery = acpi_driver_data(device);
865 battery->update_time = 0;
Andrey Borzenkov508df922007-10-28 12:50:09 +0300866 acpi_battery_update(battery);
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300867 return 0;
Jiri Kosina34c44152006-10-10 14:20:41 -0700868}
869
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400870static struct acpi_driver acpi_battery_driver = {
871 .name = "battery",
872 .class = ACPI_BATTERY_CLASS,
873 .ids = battery_device_ids,
874 .ops = {
875 .add = acpi_battery_add,
876 .resume = acpi_battery_resume,
877 .remove = acpi_battery_remove,
878 },
879};
880
Len Brown4be44fc2005-08-05 00:44:28 -0400881static int __init acpi_battery_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882{
Pavel Machek4d8316d2006-08-14 22:37:22 -0700883 if (acpi_disabled)
884 return -ENODEV;
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300885#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400886 acpi_battery_dir = acpi_lock_battery_dir();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 if (!acpi_battery_dir)
Patrick Mocheld550d982006-06-27 00:41:40 -0400888 return -ENODEV;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400889#endif
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400890 if (acpi_bus_register_driver(&acpi_battery_driver) < 0) {
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300891#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400892 acpi_unlock_battery_dir(acpi_battery_dir);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400893#endif
Patrick Mocheld550d982006-06-27 00:41:40 -0400894 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 }
Patrick Mocheld550d982006-06-27 00:41:40 -0400896 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897}
898
Len Brown4be44fc2005-08-05 00:44:28 -0400899static void __exit acpi_battery_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 acpi_bus_unregister_driver(&acpi_battery_driver);
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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905}
906
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907module_init(acpi_battery_init);
908module_exit(acpi_battery_exit);