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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_CLASS "battery"
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#define ACPI_BATTERY_DEVICE_NAME "Battery"
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#define ACPI_BATTERY_NOTIFY_STATUS 0x80
52#define ACPI_BATTERY_NOTIFY_INFO 0x81
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#define _COMPONENT ACPI_BATTERY_COMPONENT
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +030055
Len Brownf52fd662007-02-12 22:42:12 -050056ACPI_MODULE_NAME("battery");
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
Len Brownf52fd662007-02-12 22:42:12 -050058MODULE_AUTHOR("Paul Diefenbaugh");
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +040059MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
Len Brown7cda93e2007-02-12 23:50:02 -050060MODULE_DESCRIPTION("ACPI Battery Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -070061MODULE_LICENSE("GPL");
62
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +040063static unsigned int cache_time = 1000;
64module_param(cache_time, uint, 0644);
65MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +030066
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030067#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -040068extern struct proc_dir_entry *acpi_lock_battery_dir(void);
69extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
70
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +040071enum acpi_battery_files {
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +040072 info_tag = 0,
73 state_tag,
74 alarm_tag,
Alexey Starikovskiy78490d82007-05-11 13:18:55 -040075 ACPI_BATTERY_NUMFILES,
76};
77
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040078#endif
79
80static const struct acpi_device_id battery_device_ids[] = {
81 {"PNP0C0A", 0},
82 {"", 0},
83};
84
85MODULE_DEVICE_TABLE(acpi, battery_device_ids);
86
87
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +040088struct acpi_battery {
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +040089 struct mutex lock;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050090#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040091 struct power_supply bat;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050092#endif
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +040093 struct acpi_device *device;
94 unsigned long update_time;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040095 int current_now;
96 int capacity_now;
97 int voltage_now;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +040098 int design_capacity;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040099 int full_charge_capacity;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400100 int technology;
101 int design_voltage;
102 int design_capacity_warning;
103 int design_capacity_low;
104 int capacity_granularity_1;
105 int capacity_granularity_2;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400106 int alarm;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400107 char model_number[32];
108 char serial_number[32];
109 char type[32];
110 char oem_info[32];
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400111 int state;
112 int power_unit;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300113 u8 alarm_present;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114};
115
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400116#define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
117
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400118inline int acpi_battery_present(struct acpi_battery *battery)
119{
120 return battery->device->status.battery_present;
121}
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400122
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500123#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400124static int acpi_battery_technology(struct acpi_battery *battery)
125{
126 if (!strcasecmp("NiCd", battery->type))
127 return POWER_SUPPLY_TECHNOLOGY_NiCd;
128 if (!strcasecmp("NiMH", battery->type))
129 return POWER_SUPPLY_TECHNOLOGY_NiMH;
130 if (!strcasecmp("LION", battery->type))
131 return POWER_SUPPLY_TECHNOLOGY_LION;
Andrey Borzenkovad40e682007-11-10 20:02:49 +0300132 if (!strncasecmp("LI-ION", battery->type, 6))
Alexey Starikovskiy0bde7ee2007-10-28 15:33:10 +0300133 return POWER_SUPPLY_TECHNOLOGY_LION;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400134 if (!strcasecmp("LiP", battery->type))
135 return POWER_SUPPLY_TECHNOLOGY_LIPO;
136 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
137}
138
Alexey Starikovskiy91044762007-11-13 12:23:06 +0300139static int acpi_battery_get_state(struct acpi_battery *battery);
Alexey Starikovskiyb19073a2007-10-25 17:10:47 -0400140
Richard Hughes56f382a2009-01-25 15:05:50 +0000141static int acpi_battery_is_charged(struct acpi_battery *battery)
142{
143 /* either charging or discharging */
144 if (battery->state != 0)
145 return 0;
146
147 /* battery not reporting charge */
148 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN ||
149 battery->capacity_now == 0)
150 return 0;
151
152 /* good batteries update full_charge as the batteries degrade */
153 if (battery->full_charge_capacity == battery->capacity_now)
154 return 1;
155
156 /* fallback to using design values for broken batteries */
157 if (battery->design_capacity == battery->capacity_now)
158 return 1;
159
160 /* we don't do any sort of metric based on percentages */
161 return 0;
162}
163
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400164static int acpi_battery_get_property(struct power_supply *psy,
165 enum power_supply_property psp,
166 union power_supply_propval *val)
167{
168 struct acpi_battery *battery = to_acpi_battery(psy);
169
Alexey Starikovskiy91044762007-11-13 12:23:06 +0300170 if (acpi_battery_present(battery)) {
171 /* run battery update only if it is present */
172 acpi_battery_get_state(battery);
173 } else if (psp != POWER_SUPPLY_PROP_PRESENT)
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400174 return -ENODEV;
175 switch (psp) {
176 case POWER_SUPPLY_PROP_STATUS:
177 if (battery->state & 0x01)
178 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
179 else if (battery->state & 0x02)
180 val->intval = POWER_SUPPLY_STATUS_CHARGING;
Richard Hughes56f382a2009-01-25 15:05:50 +0000181 else if (acpi_battery_is_charged(battery))
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400182 val->intval = POWER_SUPPLY_STATUS_FULL;
Roland Dreier4c41d3a2007-11-07 15:09:09 -0800183 else
184 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400185 break;
186 case POWER_SUPPLY_PROP_PRESENT:
187 val->intval = acpi_battery_present(battery);
188 break;
189 case POWER_SUPPLY_PROP_TECHNOLOGY:
190 val->intval = acpi_battery_technology(battery);
191 break;
192 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
193 val->intval = battery->design_voltage * 1000;
194 break;
195 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
196 val->intval = battery->voltage_now * 1000;
197 break;
198 case POWER_SUPPLY_PROP_CURRENT_NOW:
Linus Torvaldsf10a3a32008-12-05 13:30:03 -0800199 val->intval = battery->current_now * 1000;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400200 break;
201 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
202 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
203 val->intval = battery->design_capacity * 1000;
204 break;
205 case POWER_SUPPLY_PROP_CHARGE_FULL:
206 case POWER_SUPPLY_PROP_ENERGY_FULL:
207 val->intval = battery->full_charge_capacity * 1000;
208 break;
209 case POWER_SUPPLY_PROP_CHARGE_NOW:
210 case POWER_SUPPLY_PROP_ENERGY_NOW:
211 val->intval = battery->capacity_now * 1000;
212 break;
213 case POWER_SUPPLY_PROP_MODEL_NAME:
214 val->strval = battery->model_number;
215 break;
216 case POWER_SUPPLY_PROP_MANUFACTURER:
217 val->strval = battery->oem_info;
218 break;
maximilian attems7c2670b2008-01-22 18:46:50 +0100219 case POWER_SUPPLY_PROP_SERIAL_NUMBER:
220 val->strval = battery->serial_number;
221 break;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400222 default:
223 return -EINVAL;
224 }
225 return 0;
226}
227
228static enum power_supply_property charge_battery_props[] = {
229 POWER_SUPPLY_PROP_STATUS,
230 POWER_SUPPLY_PROP_PRESENT,
231 POWER_SUPPLY_PROP_TECHNOLOGY,
232 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
233 POWER_SUPPLY_PROP_VOLTAGE_NOW,
234 POWER_SUPPLY_PROP_CURRENT_NOW,
235 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
236 POWER_SUPPLY_PROP_CHARGE_FULL,
237 POWER_SUPPLY_PROP_CHARGE_NOW,
238 POWER_SUPPLY_PROP_MODEL_NAME,
239 POWER_SUPPLY_PROP_MANUFACTURER,
maximilian attems7c2670b2008-01-22 18:46:50 +0100240 POWER_SUPPLY_PROP_SERIAL_NUMBER,
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400241};
242
243static enum power_supply_property energy_battery_props[] = {
244 POWER_SUPPLY_PROP_STATUS,
245 POWER_SUPPLY_PROP_PRESENT,
246 POWER_SUPPLY_PROP_TECHNOLOGY,
247 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
248 POWER_SUPPLY_PROP_VOLTAGE_NOW,
249 POWER_SUPPLY_PROP_CURRENT_NOW,
250 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
251 POWER_SUPPLY_PROP_ENERGY_FULL,
252 POWER_SUPPLY_PROP_ENERGY_NOW,
253 POWER_SUPPLY_PROP_MODEL_NAME,
254 POWER_SUPPLY_PROP_MANUFACTURER,
maximilian attems7c2670b2008-01-22 18:46:50 +0100255 POWER_SUPPLY_PROP_SERIAL_NUMBER,
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400256};
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500257#endif
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400258
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300259#ifdef CONFIG_ACPI_PROCFS_POWER
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400260inline char *acpi_battery_units(struct acpi_battery *battery)
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400261{
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400262 return (battery->power_unit)?"mA":"mW";
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400263}
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400264#endif
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300265
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266/* --------------------------------------------------------------------------
267 Battery Management
268 -------------------------------------------------------------------------- */
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400269struct acpi_offsets {
270 size_t offset; /* offset inside struct acpi_sbs_battery */
271 u8 mode; /* int or string? */
272};
273
274static struct acpi_offsets state_offsets[] = {
275 {offsetof(struct acpi_battery, state), 0},
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400276 {offsetof(struct acpi_battery, current_now), 0},
277 {offsetof(struct acpi_battery, capacity_now), 0},
278 {offsetof(struct acpi_battery, voltage_now), 0},
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400279};
280
281static struct acpi_offsets info_offsets[] = {
282 {offsetof(struct acpi_battery, power_unit), 0},
283 {offsetof(struct acpi_battery, design_capacity), 0},
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400284 {offsetof(struct acpi_battery, full_charge_capacity), 0},
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400285 {offsetof(struct acpi_battery, technology), 0},
286 {offsetof(struct acpi_battery, design_voltage), 0},
287 {offsetof(struct acpi_battery, design_capacity_warning), 0},
288 {offsetof(struct acpi_battery, design_capacity_low), 0},
289 {offsetof(struct acpi_battery, capacity_granularity_1), 0},
290 {offsetof(struct acpi_battery, capacity_granularity_2), 0},
291 {offsetof(struct acpi_battery, model_number), 1},
292 {offsetof(struct acpi_battery, serial_number), 1},
293 {offsetof(struct acpi_battery, type), 1},
294 {offsetof(struct acpi_battery, oem_info), 1},
295};
296
297static int extract_package(struct acpi_battery *battery,
298 union acpi_object *package,
299 struct acpi_offsets *offsets, int num)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300300{
Alexey Starikovskiy106449e2007-10-29 23:29:40 +0300301 int i;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400302 union acpi_object *element;
303 if (package->type != ACPI_TYPE_PACKAGE)
304 return -EFAULT;
305 for (i = 0; i < num; ++i) {
306 if (package->package.count <= i)
307 return -EFAULT;
308 element = &package->package.elements[i];
309 if (offsets[i].mode) {
Alexey Starikovskiy106449e2007-10-29 23:29:40 +0300310 u8 *ptr = (u8 *)battery + offsets[i].offset;
311 if (element->type == ACPI_TYPE_STRING ||
312 element->type == ACPI_TYPE_BUFFER)
313 strncpy(ptr, element->string.pointer, 32);
314 else if (element->type == ACPI_TYPE_INTEGER) {
315 strncpy(ptr, (u8 *)&element->integer.value,
316 sizeof(acpi_integer));
317 ptr[sizeof(acpi_integer)] = 0;
Alexey Starikovskiyb8a1bdb2008-03-17 22:37:42 -0400318 } else
319 *ptr = 0; /* don't have value */
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400320 } else {
Alexey Starikovskiyb8a1bdb2008-03-17 22:37:42 -0400321 int *x = (int *)((u8 *)battery + offsets[i].offset);
322 *x = (element->type == ACPI_TYPE_INTEGER) ?
323 element->integer.value : -1;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300324 }
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300325 }
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300326 return 0;
327}
328
329static int acpi_battery_get_status(struct acpi_battery *battery)
330{
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400331 if (acpi_bus_get_status(battery->device)) {
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300332 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA"));
333 return -ENODEV;
334 }
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400335 return 0;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300336}
337
338static int acpi_battery_get_info(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339{
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400340 int result = -EFAULT;
Len Brown4be44fc2005-08-05 00:44:28 -0400341 acpi_status status = 0;
342 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300344 if (!acpi_battery_present(battery))
345 return 0;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400346 mutex_lock(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400347 status = acpi_evaluate_object(battery->device->handle, "_BIF",
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400348 NULL, &buffer);
349 mutex_unlock(&battery->lock);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400350
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 if (ACPI_FAILURE(status)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400352 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400353 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 }
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400355
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400356 result = extract_package(battery, buffer.pointer,
357 info_offsets, ARRAY_SIZE(info_offsets));
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400358 kfree(buffer.pointer);
Patrick Mocheld550d982006-06-27 00:41:40 -0400359 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360}
361
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300362static int acpi_battery_get_state(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363{
Len Brown4be44fc2005-08-05 00:44:28 -0400364 int result = 0;
365 acpi_status status = 0;
366 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300368 if (!acpi_battery_present(battery))
369 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400371 if (battery->update_time &&
372 time_before(jiffies, battery->update_time +
373 msecs_to_jiffies(cache_time)))
374 return 0;
375
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400376 mutex_lock(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400377 status = acpi_evaluate_object(battery->device->handle, "_BST",
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400378 NULL, &buffer);
379 mutex_unlock(&battery->lock);
Len Brown5b31d892007-08-15 00:19:26 -0400380
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 if (ACPI_FAILURE(status)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400382 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400383 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 }
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400385
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400386 result = extract_package(battery, buffer.pointer,
387 state_offsets, ARRAY_SIZE(state_offsets));
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400388 battery->update_time = jiffies;
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400389 kfree(buffer.pointer);
Patrick Mocheld550d982006-06-27 00:41:40 -0400390 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391}
392
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400393static int acpi_battery_set_alarm(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394{
Len Brown4be44fc2005-08-05 00:44:28 -0400395 acpi_status status = 0;
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400396 union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER };
Len Brown4be44fc2005-08-05 00:44:28 -0400397 struct acpi_object_list arg_list = { 1, &arg0 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400399 if (!acpi_battery_present(battery)|| !battery->alarm_present)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300400 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400402 arg0.integer.value = battery->alarm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400404 mutex_lock(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400405 status = acpi_evaluate_object(battery->device->handle, "_BTP",
406 &arg_list, NULL);
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400407 mutex_unlock(&battery->lock);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400408
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400410 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400412 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm));
Patrick Mocheld550d982006-06-27 00:41:40 -0400413 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414}
415
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300416static int acpi_battery_init_alarm(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417{
Len Brown4be44fc2005-08-05 00:44:28 -0400418 acpi_status status = AE_OK;
419 acpi_handle handle = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300421 /* See if alarms are supported, and if so, set default */
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400422 status = acpi_get_handle(battery->device->handle, "_BTP", &handle);
423 if (ACPI_FAILURE(status)) {
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400424 battery->alarm_present = 0;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400425 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 }
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400427 battery->alarm_present = 1;
428 if (!battery->alarm)
429 battery->alarm = battery->design_capacity_warning;
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400430 return acpi_battery_set_alarm(battery);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431}
432
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500433#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300434static ssize_t acpi_battery_alarm_show(struct device *dev,
435 struct device_attribute *attr,
436 char *buf)
437{
438 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
439 return sprintf(buf, "%d\n", battery->alarm * 1000);
440}
441
442static ssize_t acpi_battery_alarm_store(struct device *dev,
443 struct device_attribute *attr,
444 const char *buf, size_t count)
445{
446 unsigned long x;
447 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
448 if (sscanf(buf, "%ld\n", &x) == 1)
449 battery->alarm = x/1000;
450 if (acpi_battery_present(battery))
451 acpi_battery_set_alarm(battery);
452 return count;
453}
454
455static struct device_attribute alarm_attr = {
Parag Warudkar01e8ef12008-10-18 20:28:50 -0700456 .attr = {.name = "alarm", .mode = 0644},
Andrey Borzenkov508df922007-10-28 12:50:09 +0300457 .show = acpi_battery_alarm_show,
458 .store = acpi_battery_alarm_store,
459};
460
461static int sysfs_add_battery(struct acpi_battery *battery)
462{
463 int result;
464
Andrey Borzenkov508df922007-10-28 12:50:09 +0300465 if (battery->power_unit) {
466 battery->bat.properties = charge_battery_props;
467 battery->bat.num_properties =
468 ARRAY_SIZE(charge_battery_props);
469 } else {
470 battery->bat.properties = energy_battery_props;
471 battery->bat.num_properties =
472 ARRAY_SIZE(energy_battery_props);
473 }
474
475 battery->bat.name = acpi_device_bid(battery->device);
476 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
477 battery->bat.get_property = acpi_battery_get_property;
478
479 result = power_supply_register(&battery->device->dev, &battery->bat);
480 if (result)
481 return result;
482 return device_create_file(battery->bat.dev, &alarm_attr);
483}
484
485static void sysfs_remove_battery(struct acpi_battery *battery)
486{
487 if (!battery->bat.dev)
488 return;
489 device_remove_file(battery->bat.dev, &alarm_attr);
490 power_supply_unregister(&battery->bat);
Alexey Starikovskiy91044762007-11-13 12:23:06 +0300491 battery->bat.dev = NULL;
Andrey Borzenkov508df922007-10-28 12:50:09 +0300492}
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500493#endif
Andrey Borzenkov508df922007-10-28 12:50:09 +0300494
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400495static int acpi_battery_update(struct acpi_battery *battery)
Vladimir Lebedev4bd35cd2007-02-10 01:43:48 -0500496{
Alexey Starikovskiy50b17852008-12-23 02:44:54 +0300497 int result, old_present = acpi_battery_present(battery);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500498 result = acpi_battery_get_status(battery);
Andrey Borzenkov508df922007-10-28 12:50:09 +0300499 if (result)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300500 return result;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500501#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300502 if (!acpi_battery_present(battery)) {
503 sysfs_remove_battery(battery);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500504 battery->update_time = 0;
Andrey Borzenkov508df922007-10-28 12:50:09 +0300505 return 0;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300506 }
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500507#endif
Alexey Starikovskiy50b17852008-12-23 02:44:54 +0300508 if (!battery->update_time ||
509 old_present != acpi_battery_present(battery)) {
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500510 result = acpi_battery_get_info(battery);
511 if (result)
512 return result;
513 acpi_battery_init_alarm(battery);
514 }
515#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300516 if (!battery->bat.dev)
517 sysfs_add_battery(battery);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500518#endif
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400519 return acpi_battery_get_state(battery);
Vladimir Lebedev4bd35cd2007-02-10 01:43:48 -0500520}
521
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522/* --------------------------------------------------------------------------
523 FS Interface (/proc)
524 -------------------------------------------------------------------------- */
525
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300526#ifdef CONFIG_ACPI_PROCFS_POWER
Len Brown4be44fc2005-08-05 00:44:28 -0400527static struct proc_dir_entry *acpi_battery_dir;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300528
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400529static int acpi_battery_print_info(struct seq_file *seq, int result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200531 struct acpi_battery *battery = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300533 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 goto end;
535
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400536 seq_printf(seq, "present: %s\n",
537 acpi_battery_present(battery)?"yes":"no");
538 if (!acpi_battery_present(battery))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 goto end;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400540 if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 seq_printf(seq, "design capacity: unknown\n");
542 else
543 seq_printf(seq, "design capacity: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400544 battery->design_capacity,
545 acpi_battery_units(battery));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400547 if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 seq_printf(seq, "last full capacity: unknown\n");
549 else
550 seq_printf(seq, "last full capacity: %d %sh\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400551 battery->full_charge_capacity,
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400552 acpi_battery_units(battery));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400554 seq_printf(seq, "battery technology: %srechargeable\n",
555 (!battery->technology)?"non-":"");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400557 if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 seq_printf(seq, "design voltage: unknown\n");
559 else
560 seq_printf(seq, "design voltage: %d mV\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400561 battery->design_voltage);
Len Brown4be44fc2005-08-05 00:44:28 -0400562 seq_printf(seq, "design capacity warning: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400563 battery->design_capacity_warning,
564 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400565 seq_printf(seq, "design capacity low: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400566 battery->design_capacity_low,
567 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400568 seq_printf(seq, "capacity granularity 1: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400569 battery->capacity_granularity_1,
570 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400571 seq_printf(seq, "capacity granularity 2: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400572 battery->capacity_granularity_2,
573 acpi_battery_units(battery));
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400574 seq_printf(seq, "model number: %s\n", battery->model_number);
575 seq_printf(seq, "serial number: %s\n", battery->serial_number);
576 seq_printf(seq, "battery type: %s\n", battery->type);
577 seq_printf(seq, "OEM info: %s\n", battery->oem_info);
Len Brown4be44fc2005-08-05 00:44:28 -0400578 end:
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300579 if (result)
580 seq_printf(seq, "ERROR: Unable to read battery info\n");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300581 return result;
582}
583
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400584static int acpi_battery_print_state(struct seq_file *seq, int result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200586 struct acpi_battery *battery = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300588 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 goto end;
590
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400591 seq_printf(seq, "present: %s\n",
592 acpi_battery_present(battery)?"yes":"no");
593 if (!acpi_battery_present(battery))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400596 seq_printf(seq, "capacity state: %s\n",
597 (battery->state & 0x04)?"critical":"ok");
598 if ((battery->state & 0x01) && (battery->state & 0x02))
Len Brown4be44fc2005-08-05 00:44:28 -0400599 seq_printf(seq,
600 "charging state: charging/discharging\n");
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400601 else if (battery->state & 0x01)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 seq_printf(seq, "charging state: discharging\n");
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400603 else if (battery->state & 0x02)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 seq_printf(seq, "charging state: charging\n");
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400605 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 seq_printf(seq, "charging state: charged\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400608 if (battery->current_now == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 seq_printf(seq, "present rate: unknown\n");
610 else
611 seq_printf(seq, "present rate: %d %s\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400612 battery->current_now, acpi_battery_units(battery));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400614 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 seq_printf(seq, "remaining capacity: unknown\n");
616 else
617 seq_printf(seq, "remaining capacity: %d %sh\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400618 battery->capacity_now, acpi_battery_units(battery));
619 if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 seq_printf(seq, "present voltage: unknown\n");
621 else
622 seq_printf(seq, "present voltage: %d mV\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400623 battery->voltage_now);
Len Brown4be44fc2005-08-05 00:44:28 -0400624 end:
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400625 if (result)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300626 seq_printf(seq, "ERROR: Unable to read battery state\n");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300627
628 return result;
629}
630
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400631static int acpi_battery_print_alarm(struct seq_file *seq, int result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200633 struct acpi_battery *battery = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300635 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 goto end;
637
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300638 if (!acpi_battery_present(battery)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 seq_printf(seq, "present: no\n");
640 goto end;
641 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 seq_printf(seq, "alarm: ");
643 if (!battery->alarm)
644 seq_printf(seq, "unsupported\n");
645 else
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400646 seq_printf(seq, "%u %sh\n", battery->alarm,
647 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400648 end:
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300649 if (result)
650 seq_printf(seq, "ERROR: Unable to read battery alarm\n");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300651 return result;
652}
653
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400654static ssize_t acpi_battery_write_alarm(struct file *file,
655 const char __user * buffer,
656 size_t count, loff_t * ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657{
Len Brown4be44fc2005-08-05 00:44:28 -0400658 int result = 0;
659 char alarm_string[12] = { '\0' };
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200660 struct seq_file *m = file->private_data;
661 struct acpi_battery *battery = m->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 if (!battery || (count > sizeof(alarm_string) - 1))
Patrick Mocheld550d982006-06-27 00:41:40 -0400664 return -EINVAL;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300665 if (!acpi_battery_present(battery)) {
666 result = -ENODEV;
667 goto end;
668 }
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300669 if (copy_from_user(alarm_string, buffer, count)) {
670 result = -EFAULT;
671 goto end;
672 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 alarm_string[count] = '\0';
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400674 battery->alarm = simple_strtol(alarm_string, NULL, 0);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400675 result = acpi_battery_set_alarm(battery);
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300676 end:
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300677 if (!result)
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400678 return count;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300679 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680}
681
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400682typedef int(*print_func)(struct seq_file *seq, int result);
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400683
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400684static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = {
685 acpi_battery_print_info,
686 acpi_battery_print_state,
687 acpi_battery_print_alarm,
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400688};
689
690static int acpi_battery_read(int fid, struct seq_file *seq)
691{
692 struct acpi_battery *battery = seq->private;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400693 int result = acpi_battery_update(battery);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400694 return acpi_print_funcs[fid](seq, result);
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400695}
696
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400697#define DECLARE_FILE_FUNCTIONS(_name) \
698static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \
699{ \
700 return acpi_battery_read(_name##_tag, seq); \
701} \
702static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \
703{ \
704 return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400705}
706
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400707DECLARE_FILE_FUNCTIONS(info);
708DECLARE_FILE_FUNCTIONS(state);
709DECLARE_FILE_FUNCTIONS(alarm);
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400710
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400711#undef DECLARE_FILE_FUNCTIONS
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400712
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400713#define FILE_DESCRIPTION_RO(_name) \
714 { \
715 .name = __stringify(_name), \
716 .mode = S_IRUGO, \
717 .ops = { \
718 .open = acpi_battery_##_name##_open_fs, \
719 .read = seq_read, \
720 .llseek = seq_lseek, \
721 .release = single_release, \
722 .owner = THIS_MODULE, \
723 }, \
724 }
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400725
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400726#define FILE_DESCRIPTION_RW(_name) \
727 { \
728 .name = __stringify(_name), \
729 .mode = S_IFREG | S_IRUGO | S_IWUSR, \
730 .ops = { \
731 .open = acpi_battery_##_name##_open_fs, \
732 .read = seq_read, \
733 .llseek = seq_lseek, \
734 .write = acpi_battery_write_##_name, \
735 .release = single_release, \
736 .owner = THIS_MODULE, \
737 }, \
738 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400740static struct battery_file {
741 struct file_operations ops;
742 mode_t mode;
743 char *name;
744} acpi_battery_file[] = {
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400745 FILE_DESCRIPTION_RO(info),
746 FILE_DESCRIPTION_RO(state),
747 FILE_DESCRIPTION_RW(alarm),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748};
749
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400750#undef FILE_DESCRIPTION_RO
751#undef FILE_DESCRIPTION_RW
752
Len Brown4be44fc2005-08-05 00:44:28 -0400753static int acpi_battery_add_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754{
Len Brown4be44fc2005-08-05 00:44:28 -0400755 struct proc_dir_entry *entry = NULL;
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400756 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 if (!acpi_device_dir(device)) {
759 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
Len Brown4be44fc2005-08-05 00:44:28 -0400760 acpi_battery_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 if (!acpi_device_dir(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400762 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 acpi_device_dir(device)->owner = THIS_MODULE;
764 }
765
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400766 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700767 entry = proc_create_data(acpi_battery_file[i].name,
768 acpi_battery_file[i].mode,
769 acpi_device_dir(device),
770 &acpi_battery_file[i].ops,
771 acpi_driver_data(device));
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400772 if (!entry)
773 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 }
Patrick Mocheld550d982006-06-27 00:41:40 -0400775 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776}
777
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400778static void acpi_battery_remove_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779{
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400780 int i;
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400781 if (!acpi_device_dir(device))
782 return;
783 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i)
784 remove_proc_entry(acpi_battery_file[i].name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 acpi_device_dir(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400787 remove_proc_entry(acpi_device_bid(device), acpi_battery_dir);
788 acpi_device_dir(device) = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789}
790
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400791#endif
Alexey Starikovskiy3e58ea02007-09-26 19:43:11 +0400792
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793/* --------------------------------------------------------------------------
794 Driver Interface
795 -------------------------------------------------------------------------- */
796
Len Brown4be44fc2005-08-05 00:44:28 -0400797static void acpi_battery_notify(acpi_handle handle, u32 event, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200799 struct acpi_battery *battery = data;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400800 struct acpi_device *device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 if (!battery)
Patrick Mocheld550d982006-06-27 00:41:40 -0400802 return;
Patrick Mochel145def82006-05-19 16:54:39 -0400803 device = battery->device;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400804 acpi_battery_update(battery);
805 acpi_bus_generate_proc_event(device, event,
806 acpi_battery_present(battery));
807 acpi_bus_generate_netlink_event(device->pnp.device_class,
Kay Sievers07944692008-10-30 01:18:59 +0100808 dev_name(&device->dev), event,
Vladimir Lebedev9ea7d572007-02-20 15:48:06 +0300809 acpi_battery_present(battery));
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500810#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300811 /* acpi_batter_update could remove power_supply object */
812 if (battery->bat.dev)
813 kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500814#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815}
816
Len Brown4be44fc2005-08-05 00:44:28 -0400817static int acpi_battery_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818{
Len Brown4be44fc2005-08-05 00:44:28 -0400819 int result = 0;
820 acpi_status status = 0;
821 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);
835 if (result)
836 goto end;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400837#endif
Patrick Mochel3b073ec2006-05-19 16:54:41 -0400838 status = acpi_install_notify_handler(device->handle,
Vladimir Lebedev9fdae722006-06-27 04:49:00 -0400839 ACPI_ALL_NOTIFY,
Len Brown4be44fc2005-08-05 00:44:28 -0400840 acpi_battery_notify, battery);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 if (ACPI_FAILURE(status)) {
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300842 ACPI_EXCEPTION((AE_INFO, status, "Installing notify handler"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 result = -ENODEV;
844 goto end;
845 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400847 ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
848 device->status.battery_present ? "present" : "absent");
Len Brown4be44fc2005-08-05 00:44:28 -0400849 end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 if (result) {
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300851#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 acpi_battery_remove_fs(device);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400853#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854 kfree(battery);
855 }
Patrick Mocheld550d982006-06-27 00:41:40 -0400856 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857}
858
Len Brown4be44fc2005-08-05 00:44:28 -0400859static int acpi_battery_remove(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860{
Len Brown4be44fc2005-08-05 00:44:28 -0400861 acpi_status status = 0;
862 struct acpi_battery *battery = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400865 return -EINVAL;
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200866 battery = acpi_driver_data(device);
Patrick Mochel3b073ec2006-05-19 16:54:41 -0400867 status = acpi_remove_notify_handler(device->handle,
Vladimir Lebedev9fdae722006-06-27 04:49:00 -0400868 ACPI_ALL_NOTIFY,
Len Brown4be44fc2005-08-05 00:44:28 -0400869 acpi_battery_notify);
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300870#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 acpi_battery_remove_fs(device);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400872#endif
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500873#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300874 sysfs_remove_battery(battery);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500875#endif
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400876 mutex_destroy(&battery->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 kfree(battery);
Patrick Mocheld550d982006-06-27 00:41:40 -0400878 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879}
880
Jiri Kosina34c44152006-10-10 14:20:41 -0700881/* this is needed to learn about changes made in suspended state */
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800882static int acpi_battery_resume(struct acpi_device *device)
Jiri Kosina34c44152006-10-10 14:20:41 -0700883{
884 struct acpi_battery *battery;
Jiri Kosina34c44152006-10-10 14:20:41 -0700885 if (!device)
886 return -EINVAL;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400887 battery = acpi_driver_data(device);
888 battery->update_time = 0;
Andrey Borzenkov508df922007-10-28 12:50:09 +0300889 acpi_battery_update(battery);
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300890 return 0;
Jiri Kosina34c44152006-10-10 14:20:41 -0700891}
892
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400893static struct acpi_driver acpi_battery_driver = {
894 .name = "battery",
895 .class = ACPI_BATTERY_CLASS,
896 .ids = battery_device_ids,
897 .ops = {
898 .add = acpi_battery_add,
899 .resume = acpi_battery_resume,
900 .remove = acpi_battery_remove,
901 },
902};
903
Len Brown4be44fc2005-08-05 00:44:28 -0400904static int __init acpi_battery_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905{
Pavel Machek4d8316d2006-08-14 22:37:22 -0700906 if (acpi_disabled)
907 return -ENODEV;
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300908#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400909 acpi_battery_dir = acpi_lock_battery_dir();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 if (!acpi_battery_dir)
Patrick Mocheld550d982006-06-27 00:41:40 -0400911 return -ENODEV;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400912#endif
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400913 if (acpi_bus_register_driver(&acpi_battery_driver) < 0) {
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300914#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400915 acpi_unlock_battery_dir(acpi_battery_dir);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400916#endif
Patrick Mocheld550d982006-06-27 00:41:40 -0400917 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 }
Patrick Mocheld550d982006-06-27 00:41:40 -0400919 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920}
921
Len Brown4be44fc2005-08-05 00:44:28 -0400922static void __exit acpi_battery_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 acpi_bus_unregister_driver(&acpi_battery_driver);
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300925#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400926 acpi_unlock_battery_dir(acpi_battery_dir);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400927#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928}
929
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930module_init(acpi_battery_init);
931module_exit(acpi_battery_exit);