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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +04002 * battery.c - ACPI Battery Driver (Revision: 2.0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +04004 * Copyright (C) 2007 Alexey Starikovskiy <astarikovskiy@suse.de>
5 * Copyright (C) 2004-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
7 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
8 *
9 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License along
22 * with this program; if not, write to the Free Software Foundation, Inc.,
23 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
24 *
25 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 */
27
28#include <linux/kernel.h>
29#include <linux/module.h>
30#include <linux/init.h>
31#include <linux/types.h>
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +040032#include <linux/jiffies.h>
Arjan van de Ven0f66af52009-01-10 14:19:05 -050033#include <linux/async.h>
Hector Martinbc76f902009-08-06 15:57:48 -070034#include <linux/dmi.h>
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040035
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030036#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <linux/proc_fs.h>
38#include <linux/seq_file.h>
39#include <asm/uaccess.h>
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040040#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
42#include <acpi/acpi_bus.h>
43#include <acpi/acpi_drivers.h>
44
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050045#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040046#include <linux/power_supply.h>
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050047#endif
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040048
Len Browna192a952009-07-28 16:45:54 -040049#define PREFIX "ACPI: "
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
52
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#define ACPI_BATTERY_CLASS "battery"
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#define ACPI_BATTERY_DEVICE_NAME "Battery"
Linus Torvalds1da177e2005-04-16 15:20:36 -070055#define ACPI_BATTERY_NOTIFY_STATUS 0x80
56#define ACPI_BATTERY_NOTIFY_INFO 0x81
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
Linus Torvalds1da177e2005-04-16 15:20:36 -070058#define _COMPONENT ACPI_BATTERY_COMPONENT
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +030059
Len Brownf52fd662007-02-12 22:42:12 -050060ACPI_MODULE_NAME("battery");
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Len Brownf52fd662007-02-12 22:42:12 -050062MODULE_AUTHOR("Paul Diefenbaugh");
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +040063MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
Len Brown7cda93e2007-02-12 23:50:02 -050064MODULE_DESCRIPTION("ACPI Battery Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -070065MODULE_LICENSE("GPL");
66
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +040067static unsigned int cache_time = 1000;
68module_param(cache_time, uint, 0644);
69MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +030070
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030071#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -040072extern struct proc_dir_entry *acpi_lock_battery_dir(void);
73extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
74
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +040075enum acpi_battery_files {
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +040076 info_tag = 0,
77 state_tag,
78 alarm_tag,
Alexey Starikovskiy78490d82007-05-11 13:18:55 -040079 ACPI_BATTERY_NUMFILES,
80};
81
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040082#endif
83
84static const struct acpi_device_id battery_device_ids[] = {
85 {"PNP0C0A", 0},
86 {"", 0},
87};
88
89MODULE_DEVICE_TABLE(acpi, battery_device_ids);
90
Hector Martinbc76f902009-08-06 15:57:48 -070091/* For buggy DSDTs that report negative 16-bit values for either charging
92 * or discharging current and/or report 0 as 65536 due to bad math.
93 */
94#define QUIRK_SIGNED16_CURRENT 0x0001
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040095
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +040096struct acpi_battery {
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +040097 struct mutex lock;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050098#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040099 struct power_supply bat;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500100#endif
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400101 struct acpi_device *device;
102 unsigned long update_time;
Alexey Starikovskiy7faa1442009-03-27 22:23:52 -0400103 int rate_now;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400104 int capacity_now;
105 int voltage_now;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400106 int design_capacity;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400107 int full_charge_capacity;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400108 int technology;
109 int design_voltage;
110 int design_capacity_warning;
111 int design_capacity_low;
112 int capacity_granularity_1;
113 int capacity_granularity_2;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400114 int alarm;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400115 char model_number[32];
116 char serial_number[32];
117 char type[32];
118 char oem_info[32];
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400119 int state;
120 int power_unit;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300121 u8 alarm_present;
Hector Martinbc76f902009-08-06 15:57:48 -0700122 long quirks;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123};
124
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400125#define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
126
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400127inline int acpi_battery_present(struct acpi_battery *battery)
128{
129 return battery->device->status.battery_present;
130}
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400131
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500132#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400133static int acpi_battery_technology(struct acpi_battery *battery)
134{
135 if (!strcasecmp("NiCd", battery->type))
136 return POWER_SUPPLY_TECHNOLOGY_NiCd;
137 if (!strcasecmp("NiMH", battery->type))
138 return POWER_SUPPLY_TECHNOLOGY_NiMH;
139 if (!strcasecmp("LION", battery->type))
140 return POWER_SUPPLY_TECHNOLOGY_LION;
Andrey Borzenkovad40e682007-11-10 20:02:49 +0300141 if (!strncasecmp("LI-ION", battery->type, 6))
Alexey Starikovskiy0bde7ee2007-10-28 15:33:10 +0300142 return POWER_SUPPLY_TECHNOLOGY_LION;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400143 if (!strcasecmp("LiP", battery->type))
144 return POWER_SUPPLY_TECHNOLOGY_LIPO;
145 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
146}
147
Alexey Starikovskiy91044762007-11-13 12:23:06 +0300148static int acpi_battery_get_state(struct acpi_battery *battery);
Alexey Starikovskiyb19073a2007-10-25 17:10:47 -0400149
Richard Hughes56f382a2009-01-25 15:05:50 +0000150static int acpi_battery_is_charged(struct acpi_battery *battery)
151{
152 /* either charging or discharging */
153 if (battery->state != 0)
154 return 0;
155
156 /* battery not reporting charge */
157 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN ||
158 battery->capacity_now == 0)
159 return 0;
160
161 /* good batteries update full_charge as the batteries degrade */
162 if (battery->full_charge_capacity == battery->capacity_now)
163 return 1;
164
165 /* fallback to using design values for broken batteries */
166 if (battery->design_capacity == battery->capacity_now)
167 return 1;
168
169 /* we don't do any sort of metric based on percentages */
170 return 0;
171}
172
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400173static int acpi_battery_get_property(struct power_supply *psy,
174 enum power_supply_property psp,
175 union power_supply_propval *val)
176{
177 struct acpi_battery *battery = to_acpi_battery(psy);
178
Alexey Starikovskiy91044762007-11-13 12:23:06 +0300179 if (acpi_battery_present(battery)) {
180 /* run battery update only if it is present */
181 acpi_battery_get_state(battery);
182 } else if (psp != POWER_SUPPLY_PROP_PRESENT)
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400183 return -ENODEV;
184 switch (psp) {
185 case POWER_SUPPLY_PROP_STATUS:
186 if (battery->state & 0x01)
187 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
188 else if (battery->state & 0x02)
189 val->intval = POWER_SUPPLY_STATUS_CHARGING;
Richard Hughes56f382a2009-01-25 15:05:50 +0000190 else if (acpi_battery_is_charged(battery))
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400191 val->intval = POWER_SUPPLY_STATUS_FULL;
Roland Dreier4c41d3a2007-11-07 15:09:09 -0800192 else
193 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400194 break;
195 case POWER_SUPPLY_PROP_PRESENT:
196 val->intval = acpi_battery_present(battery);
197 break;
198 case POWER_SUPPLY_PROP_TECHNOLOGY:
199 val->intval = acpi_battery_technology(battery);
200 break;
201 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
202 val->intval = battery->design_voltage * 1000;
203 break;
204 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
205 val->intval = battery->voltage_now * 1000;
206 break;
207 case POWER_SUPPLY_PROP_CURRENT_NOW:
Alexey Starikovskiy7faa1442009-03-27 22:23:52 -0400208 case POWER_SUPPLY_PROP_POWER_NOW:
209 val->intval = battery->rate_now * 1000;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400210 break;
211 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
212 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
213 val->intval = battery->design_capacity * 1000;
214 break;
215 case POWER_SUPPLY_PROP_CHARGE_FULL:
216 case POWER_SUPPLY_PROP_ENERGY_FULL:
217 val->intval = battery->full_charge_capacity * 1000;
218 break;
219 case POWER_SUPPLY_PROP_CHARGE_NOW:
220 case POWER_SUPPLY_PROP_ENERGY_NOW:
221 val->intval = battery->capacity_now * 1000;
222 break;
223 case POWER_SUPPLY_PROP_MODEL_NAME:
224 val->strval = battery->model_number;
225 break;
226 case POWER_SUPPLY_PROP_MANUFACTURER:
227 val->strval = battery->oem_info;
228 break;
maximilian attems7c2670b2008-01-22 18:46:50 +0100229 case POWER_SUPPLY_PROP_SERIAL_NUMBER:
230 val->strval = battery->serial_number;
231 break;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400232 default:
233 return -EINVAL;
234 }
235 return 0;
236}
237
238static enum power_supply_property charge_battery_props[] = {
239 POWER_SUPPLY_PROP_STATUS,
240 POWER_SUPPLY_PROP_PRESENT,
241 POWER_SUPPLY_PROP_TECHNOLOGY,
242 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
243 POWER_SUPPLY_PROP_VOLTAGE_NOW,
244 POWER_SUPPLY_PROP_CURRENT_NOW,
245 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
246 POWER_SUPPLY_PROP_CHARGE_FULL,
247 POWER_SUPPLY_PROP_CHARGE_NOW,
248 POWER_SUPPLY_PROP_MODEL_NAME,
249 POWER_SUPPLY_PROP_MANUFACTURER,
maximilian attems7c2670b2008-01-22 18:46:50 +0100250 POWER_SUPPLY_PROP_SERIAL_NUMBER,
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400251};
252
253static enum power_supply_property energy_battery_props[] = {
254 POWER_SUPPLY_PROP_STATUS,
255 POWER_SUPPLY_PROP_PRESENT,
256 POWER_SUPPLY_PROP_TECHNOLOGY,
257 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
258 POWER_SUPPLY_PROP_VOLTAGE_NOW,
259 POWER_SUPPLY_PROP_CURRENT_NOW,
Alexey Starikovskiy7faa1442009-03-27 22:23:52 -0400260 POWER_SUPPLY_PROP_POWER_NOW,
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400261 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
262 POWER_SUPPLY_PROP_ENERGY_FULL,
263 POWER_SUPPLY_PROP_ENERGY_NOW,
264 POWER_SUPPLY_PROP_MODEL_NAME,
265 POWER_SUPPLY_PROP_MANUFACTURER,
maximilian attems7c2670b2008-01-22 18:46:50 +0100266 POWER_SUPPLY_PROP_SERIAL_NUMBER,
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400267};
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500268#endif
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400269
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300270#ifdef CONFIG_ACPI_PROCFS_POWER
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400271inline char *acpi_battery_units(struct acpi_battery *battery)
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400272{
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400273 return (battery->power_unit)?"mA":"mW";
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400274}
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400275#endif
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300276
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277/* --------------------------------------------------------------------------
278 Battery Management
279 -------------------------------------------------------------------------- */
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400280struct acpi_offsets {
281 size_t offset; /* offset inside struct acpi_sbs_battery */
282 u8 mode; /* int or string? */
283};
284
285static struct acpi_offsets state_offsets[] = {
286 {offsetof(struct acpi_battery, state), 0},
Alexey Starikovskiy7faa1442009-03-27 22:23:52 -0400287 {offsetof(struct acpi_battery, rate_now), 0},
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400288 {offsetof(struct acpi_battery, capacity_now), 0},
289 {offsetof(struct acpi_battery, voltage_now), 0},
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400290};
291
292static struct acpi_offsets info_offsets[] = {
293 {offsetof(struct acpi_battery, power_unit), 0},
294 {offsetof(struct acpi_battery, design_capacity), 0},
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400295 {offsetof(struct acpi_battery, full_charge_capacity), 0},
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400296 {offsetof(struct acpi_battery, technology), 0},
297 {offsetof(struct acpi_battery, design_voltage), 0},
298 {offsetof(struct acpi_battery, design_capacity_warning), 0},
299 {offsetof(struct acpi_battery, design_capacity_low), 0},
300 {offsetof(struct acpi_battery, capacity_granularity_1), 0},
301 {offsetof(struct acpi_battery, capacity_granularity_2), 0},
302 {offsetof(struct acpi_battery, model_number), 1},
303 {offsetof(struct acpi_battery, serial_number), 1},
304 {offsetof(struct acpi_battery, type), 1},
305 {offsetof(struct acpi_battery, oem_info), 1},
306};
307
308static int extract_package(struct acpi_battery *battery,
309 union acpi_object *package,
310 struct acpi_offsets *offsets, int num)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300311{
Alexey Starikovskiy106449e2007-10-29 23:29:40 +0300312 int i;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400313 union acpi_object *element;
314 if (package->type != ACPI_TYPE_PACKAGE)
315 return -EFAULT;
316 for (i = 0; i < num; ++i) {
317 if (package->package.count <= i)
318 return -EFAULT;
319 element = &package->package.elements[i];
320 if (offsets[i].mode) {
Alexey Starikovskiy106449e2007-10-29 23:29:40 +0300321 u8 *ptr = (u8 *)battery + offsets[i].offset;
322 if (element->type == ACPI_TYPE_STRING ||
323 element->type == ACPI_TYPE_BUFFER)
324 strncpy(ptr, element->string.pointer, 32);
325 else if (element->type == ACPI_TYPE_INTEGER) {
326 strncpy(ptr, (u8 *)&element->integer.value,
327 sizeof(acpi_integer));
328 ptr[sizeof(acpi_integer)] = 0;
Alexey Starikovskiyb8a1bdb2008-03-17 22:37:42 -0400329 } else
330 *ptr = 0; /* don't have value */
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400331 } else {
Alexey Starikovskiyb8a1bdb2008-03-17 22:37:42 -0400332 int *x = (int *)((u8 *)battery + offsets[i].offset);
333 *x = (element->type == ACPI_TYPE_INTEGER) ?
334 element->integer.value : -1;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300335 }
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300336 }
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300337 return 0;
338}
339
340static int acpi_battery_get_status(struct acpi_battery *battery)
341{
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400342 if (acpi_bus_get_status(battery->device)) {
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300343 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA"));
344 return -ENODEV;
345 }
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400346 return 0;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300347}
348
349static int acpi_battery_get_info(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350{
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400351 int result = -EFAULT;
Len Brown4be44fc2005-08-05 00:44:28 -0400352 acpi_status status = 0;
353 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300355 if (!acpi_battery_present(battery))
356 return 0;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400357 mutex_lock(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400358 status = acpi_evaluate_object(battery->device->handle, "_BIF",
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400359 NULL, &buffer);
360 mutex_unlock(&battery->lock);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400361
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 if (ACPI_FAILURE(status)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400363 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400364 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 }
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400366
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400367 result = extract_package(battery, buffer.pointer,
368 info_offsets, ARRAY_SIZE(info_offsets));
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400369 kfree(buffer.pointer);
Patrick Mocheld550d982006-06-27 00:41:40 -0400370 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371}
372
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300373static int acpi_battery_get_state(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374{
Len Brown4be44fc2005-08-05 00:44:28 -0400375 int result = 0;
376 acpi_status status = 0;
377 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300379 if (!acpi_battery_present(battery))
380 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400382 if (battery->update_time &&
383 time_before(jiffies, battery->update_time +
384 msecs_to_jiffies(cache_time)))
385 return 0;
386
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400387 mutex_lock(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400388 status = acpi_evaluate_object(battery->device->handle, "_BST",
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400389 NULL, &buffer);
390 mutex_unlock(&battery->lock);
Len Brown5b31d892007-08-15 00:19:26 -0400391
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 if (ACPI_FAILURE(status)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400393 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400394 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 }
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400396
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400397 result = extract_package(battery, buffer.pointer,
398 state_offsets, ARRAY_SIZE(state_offsets));
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400399 battery->update_time = jiffies;
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400400 kfree(buffer.pointer);
Hector Martinbc76f902009-08-06 15:57:48 -0700401
402 if ((battery->quirks & QUIRK_SIGNED16_CURRENT) &&
403 battery->rate_now != -1)
404 battery->rate_now = abs((s16)battery->rate_now);
405
Patrick Mocheld550d982006-06-27 00:41:40 -0400406 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407}
408
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400409static int acpi_battery_set_alarm(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410{
Len Brown4be44fc2005-08-05 00:44:28 -0400411 acpi_status status = 0;
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400412 union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER };
Len Brown4be44fc2005-08-05 00:44:28 -0400413 struct acpi_object_list arg_list = { 1, &arg0 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400415 if (!acpi_battery_present(battery)|| !battery->alarm_present)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300416 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400418 arg0.integer.value = battery->alarm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400420 mutex_lock(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400421 status = acpi_evaluate_object(battery->device->handle, "_BTP",
422 &arg_list, NULL);
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400423 mutex_unlock(&battery->lock);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400424
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400426 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400428 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm));
Patrick Mocheld550d982006-06-27 00:41:40 -0400429 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430}
431
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300432static int acpi_battery_init_alarm(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433{
Len Brown4be44fc2005-08-05 00:44:28 -0400434 acpi_status status = AE_OK;
435 acpi_handle handle = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300437 /* See if alarms are supported, and if so, set default */
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400438 status = acpi_get_handle(battery->device->handle, "_BTP", &handle);
439 if (ACPI_FAILURE(status)) {
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400440 battery->alarm_present = 0;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400441 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 }
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400443 battery->alarm_present = 1;
444 if (!battery->alarm)
445 battery->alarm = battery->design_capacity_warning;
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400446 return acpi_battery_set_alarm(battery);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447}
448
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500449#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300450static ssize_t acpi_battery_alarm_show(struct device *dev,
451 struct device_attribute *attr,
452 char *buf)
453{
454 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
455 return sprintf(buf, "%d\n", battery->alarm * 1000);
456}
457
458static ssize_t acpi_battery_alarm_store(struct device *dev,
459 struct device_attribute *attr,
460 const char *buf, size_t count)
461{
462 unsigned long x;
463 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
464 if (sscanf(buf, "%ld\n", &x) == 1)
465 battery->alarm = x/1000;
466 if (acpi_battery_present(battery))
467 acpi_battery_set_alarm(battery);
468 return count;
469}
470
471static struct device_attribute alarm_attr = {
Parag Warudkar01e8ef12008-10-18 20:28:50 -0700472 .attr = {.name = "alarm", .mode = 0644},
Andrey Borzenkov508df922007-10-28 12:50:09 +0300473 .show = acpi_battery_alarm_show,
474 .store = acpi_battery_alarm_store,
475};
476
477static int sysfs_add_battery(struct acpi_battery *battery)
478{
479 int result;
480
Andrey Borzenkov508df922007-10-28 12:50:09 +0300481 if (battery->power_unit) {
482 battery->bat.properties = charge_battery_props;
483 battery->bat.num_properties =
484 ARRAY_SIZE(charge_battery_props);
485 } else {
486 battery->bat.properties = energy_battery_props;
487 battery->bat.num_properties =
488 ARRAY_SIZE(energy_battery_props);
489 }
490
491 battery->bat.name = acpi_device_bid(battery->device);
492 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
493 battery->bat.get_property = acpi_battery_get_property;
494
495 result = power_supply_register(&battery->device->dev, &battery->bat);
496 if (result)
497 return result;
498 return device_create_file(battery->bat.dev, &alarm_attr);
499}
500
501static void sysfs_remove_battery(struct acpi_battery *battery)
502{
503 if (!battery->bat.dev)
504 return;
505 device_remove_file(battery->bat.dev, &alarm_attr);
506 power_supply_unregister(&battery->bat);
Alexey Starikovskiy91044762007-11-13 12:23:06 +0300507 battery->bat.dev = NULL;
Andrey Borzenkov508df922007-10-28 12:50:09 +0300508}
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500509#endif
Andrey Borzenkov508df922007-10-28 12:50:09 +0300510
Hector Martinbc76f902009-08-06 15:57:48 -0700511static void acpi_battery_quirks(struct acpi_battery *battery)
512{
513 battery->quirks = 0;
514 if (dmi_name_in_vendors("Acer") && battery->power_unit) {
515 battery->quirks |= QUIRK_SIGNED16_CURRENT;
516 }
517}
518
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400519static int acpi_battery_update(struct acpi_battery *battery)
Vladimir Lebedev4bd35cd2007-02-10 01:43:48 -0500520{
Alexey Starikovskiy50b17852008-12-23 02:44:54 +0300521 int result, old_present = acpi_battery_present(battery);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500522 result = acpi_battery_get_status(battery);
Andrey Borzenkov508df922007-10-28 12:50:09 +0300523 if (result)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300524 return result;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500525#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300526 if (!acpi_battery_present(battery)) {
527 sysfs_remove_battery(battery);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500528 battery->update_time = 0;
Andrey Borzenkov508df922007-10-28 12:50:09 +0300529 return 0;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300530 }
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500531#endif
Alexey Starikovskiy50b17852008-12-23 02:44:54 +0300532 if (!battery->update_time ||
533 old_present != acpi_battery_present(battery)) {
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500534 result = acpi_battery_get_info(battery);
535 if (result)
536 return result;
Hector Martinbc76f902009-08-06 15:57:48 -0700537 acpi_battery_quirks(battery);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500538 acpi_battery_init_alarm(battery);
539 }
540#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300541 if (!battery->bat.dev)
542 sysfs_add_battery(battery);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500543#endif
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400544 return acpi_battery_get_state(battery);
Vladimir Lebedev4bd35cd2007-02-10 01:43:48 -0500545}
546
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547/* --------------------------------------------------------------------------
548 FS Interface (/proc)
549 -------------------------------------------------------------------------- */
550
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300551#ifdef CONFIG_ACPI_PROCFS_POWER
Len Brown4be44fc2005-08-05 00:44:28 -0400552static struct proc_dir_entry *acpi_battery_dir;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300553
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400554static int acpi_battery_print_info(struct seq_file *seq, int result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200556 struct acpi_battery *battery = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300558 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 goto end;
560
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400561 seq_printf(seq, "present: %s\n",
562 acpi_battery_present(battery)?"yes":"no");
563 if (!acpi_battery_present(battery))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 goto end;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400565 if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 seq_printf(seq, "design capacity: unknown\n");
567 else
568 seq_printf(seq, "design capacity: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400569 battery->design_capacity,
570 acpi_battery_units(battery));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400572 if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 seq_printf(seq, "last full capacity: unknown\n");
574 else
575 seq_printf(seq, "last full capacity: %d %sh\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400576 battery->full_charge_capacity,
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400577 acpi_battery_units(battery));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400579 seq_printf(seq, "battery technology: %srechargeable\n",
580 (!battery->technology)?"non-":"");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400582 if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 seq_printf(seq, "design voltage: unknown\n");
584 else
585 seq_printf(seq, "design voltage: %d mV\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400586 battery->design_voltage);
Len Brown4be44fc2005-08-05 00:44:28 -0400587 seq_printf(seq, "design capacity warning: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400588 battery->design_capacity_warning,
589 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400590 seq_printf(seq, "design capacity low: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400591 battery->design_capacity_low,
592 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400593 seq_printf(seq, "capacity granularity 1: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400594 battery->capacity_granularity_1,
595 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400596 seq_printf(seq, "capacity granularity 2: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400597 battery->capacity_granularity_2,
598 acpi_battery_units(battery));
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400599 seq_printf(seq, "model number: %s\n", battery->model_number);
600 seq_printf(seq, "serial number: %s\n", battery->serial_number);
601 seq_printf(seq, "battery type: %s\n", battery->type);
602 seq_printf(seq, "OEM info: %s\n", battery->oem_info);
Len Brown4be44fc2005-08-05 00:44:28 -0400603 end:
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300604 if (result)
605 seq_printf(seq, "ERROR: Unable to read battery info\n");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300606 return result;
607}
608
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400609static int acpi_battery_print_state(struct seq_file *seq, int result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200611 struct acpi_battery *battery = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300613 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 goto end;
615
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400616 seq_printf(seq, "present: %s\n",
617 acpi_battery_present(battery)?"yes":"no");
618 if (!acpi_battery_present(battery))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400621 seq_printf(seq, "capacity state: %s\n",
622 (battery->state & 0x04)?"critical":"ok");
623 if ((battery->state & 0x01) && (battery->state & 0x02))
Len Brown4be44fc2005-08-05 00:44:28 -0400624 seq_printf(seq,
625 "charging state: charging/discharging\n");
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400626 else if (battery->state & 0x01)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 seq_printf(seq, "charging state: discharging\n");
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400628 else if (battery->state & 0x02)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 seq_printf(seq, "charging state: charging\n");
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400630 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 seq_printf(seq, "charging state: charged\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632
Alexey Starikovskiy7faa1442009-03-27 22:23:52 -0400633 if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 seq_printf(seq, "present rate: unknown\n");
635 else
636 seq_printf(seq, "present rate: %d %s\n",
Alexey Starikovskiy7faa1442009-03-27 22:23:52 -0400637 battery->rate_now, acpi_battery_units(battery));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400639 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 seq_printf(seq, "remaining capacity: unknown\n");
641 else
642 seq_printf(seq, "remaining capacity: %d %sh\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400643 battery->capacity_now, acpi_battery_units(battery));
644 if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 seq_printf(seq, "present voltage: unknown\n");
646 else
647 seq_printf(seq, "present voltage: %d mV\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400648 battery->voltage_now);
Len Brown4be44fc2005-08-05 00:44:28 -0400649 end:
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400650 if (result)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300651 seq_printf(seq, "ERROR: Unable to read battery state\n");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300652
653 return result;
654}
655
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400656static int acpi_battery_print_alarm(struct seq_file *seq, int result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200658 struct acpi_battery *battery = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300660 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 goto end;
662
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300663 if (!acpi_battery_present(battery)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 seq_printf(seq, "present: no\n");
665 goto end;
666 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 seq_printf(seq, "alarm: ");
668 if (!battery->alarm)
669 seq_printf(seq, "unsupported\n");
670 else
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400671 seq_printf(seq, "%u %sh\n", battery->alarm,
672 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400673 end:
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300674 if (result)
675 seq_printf(seq, "ERROR: Unable to read battery alarm\n");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300676 return result;
677}
678
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400679static ssize_t acpi_battery_write_alarm(struct file *file,
680 const char __user * buffer,
681 size_t count, loff_t * ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682{
Len Brown4be44fc2005-08-05 00:44:28 -0400683 int result = 0;
684 char alarm_string[12] = { '\0' };
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200685 struct seq_file *m = file->private_data;
686 struct acpi_battery *battery = m->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 if (!battery || (count > sizeof(alarm_string) - 1))
Patrick Mocheld550d982006-06-27 00:41:40 -0400689 return -EINVAL;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300690 if (!acpi_battery_present(battery)) {
691 result = -ENODEV;
692 goto end;
693 }
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300694 if (copy_from_user(alarm_string, buffer, count)) {
695 result = -EFAULT;
696 goto end;
697 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 alarm_string[count] = '\0';
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400699 battery->alarm = simple_strtol(alarm_string, NULL, 0);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400700 result = acpi_battery_set_alarm(battery);
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300701 end:
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300702 if (!result)
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400703 return count;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300704 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705}
706
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400707typedef int(*print_func)(struct seq_file *seq, int result);
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400708
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400709static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = {
710 acpi_battery_print_info,
711 acpi_battery_print_state,
712 acpi_battery_print_alarm,
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400713};
714
715static int acpi_battery_read(int fid, struct seq_file *seq)
716{
717 struct acpi_battery *battery = seq->private;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400718 int result = acpi_battery_update(battery);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400719 return acpi_print_funcs[fid](seq, result);
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400720}
721
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400722#define DECLARE_FILE_FUNCTIONS(_name) \
723static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \
724{ \
725 return acpi_battery_read(_name##_tag, seq); \
726} \
727static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \
728{ \
729 return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400730}
731
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400732DECLARE_FILE_FUNCTIONS(info);
733DECLARE_FILE_FUNCTIONS(state);
734DECLARE_FILE_FUNCTIONS(alarm);
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400735
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400736#undef DECLARE_FILE_FUNCTIONS
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400737
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400738#define FILE_DESCRIPTION_RO(_name) \
739 { \
740 .name = __stringify(_name), \
741 .mode = S_IRUGO, \
742 .ops = { \
743 .open = acpi_battery_##_name##_open_fs, \
744 .read = seq_read, \
745 .llseek = seq_lseek, \
746 .release = single_release, \
747 .owner = THIS_MODULE, \
748 }, \
749 }
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400750
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400751#define FILE_DESCRIPTION_RW(_name) \
752 { \
753 .name = __stringify(_name), \
754 .mode = S_IFREG | S_IRUGO | S_IWUSR, \
755 .ops = { \
756 .open = acpi_battery_##_name##_open_fs, \
757 .read = seq_read, \
758 .llseek = seq_lseek, \
759 .write = acpi_battery_write_##_name, \
760 .release = single_release, \
761 .owner = THIS_MODULE, \
762 }, \
763 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400765static struct battery_file {
766 struct file_operations ops;
767 mode_t mode;
Jan Engelhardt070d8eb2009-01-12 00:07:55 +0100768 const char *name;
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400769} acpi_battery_file[] = {
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400770 FILE_DESCRIPTION_RO(info),
771 FILE_DESCRIPTION_RO(state),
772 FILE_DESCRIPTION_RW(alarm),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773};
774
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400775#undef FILE_DESCRIPTION_RO
776#undef FILE_DESCRIPTION_RW
777
Len Brown4be44fc2005-08-05 00:44:28 -0400778static int acpi_battery_add_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779{
Len Brown4be44fc2005-08-05 00:44:28 -0400780 struct proc_dir_entry *entry = NULL;
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400781 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 if (!acpi_device_dir(device)) {
784 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
Len Brown4be44fc2005-08-05 00:44:28 -0400785 acpi_battery_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 if (!acpi_device_dir(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400787 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788 }
789
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400790 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700791 entry = proc_create_data(acpi_battery_file[i].name,
792 acpi_battery_file[i].mode,
793 acpi_device_dir(device),
794 &acpi_battery_file[i].ops,
795 acpi_driver_data(device));
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400796 if (!entry)
797 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 }
Patrick Mocheld550d982006-06-27 00:41:40 -0400799 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800}
801
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400802static void acpi_battery_remove_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803{
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400804 int i;
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400805 if (!acpi_device_dir(device))
806 return;
807 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i)
808 remove_proc_entry(acpi_battery_file[i].name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 acpi_device_dir(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400811 remove_proc_entry(acpi_device_bid(device), acpi_battery_dir);
812 acpi_device_dir(device) = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813}
814
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400815#endif
Alexey Starikovskiy3e58ea02007-09-26 19:43:11 +0400816
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817/* --------------------------------------------------------------------------
818 Driver Interface
819 -------------------------------------------------------------------------- */
820
Bjorn Helgaasd9406692009-04-30 09:35:47 -0600821static void acpi_battery_notify(struct acpi_device *device, u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822{
Bjorn Helgaasd9406692009-04-30 09:35:47 -0600823 struct acpi_battery *battery = acpi_driver_data(device);
824
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 if (!battery)
Patrick Mocheld550d982006-06-27 00:41:40 -0400826 return;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400827 acpi_battery_update(battery);
828 acpi_bus_generate_proc_event(device, event,
829 acpi_battery_present(battery));
830 acpi_bus_generate_netlink_event(device->pnp.device_class,
Kay Sievers07944692008-10-30 01:18:59 +0100831 dev_name(&device->dev), event,
Vladimir Lebedev9ea7d572007-02-20 15:48:06 +0300832 acpi_battery_present(battery));
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500833#ifdef CONFIG_ACPI_SYSFS_POWER
Justin P. Mattock2345baf2009-12-13 14:42:36 -0800834 /* acpi_battery_update could remove power_supply object */
Andrey Borzenkov508df922007-10-28 12:50:09 +0300835 if (battery->bat.dev)
836 kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500837#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838}
839
Len Brown4be44fc2005-08-05 00:44:28 -0400840static int acpi_battery_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841{
Len Brown4be44fc2005-08-05 00:44:28 -0400842 int result = 0;
Len Brown4be44fc2005-08-05 00:44:28 -0400843 struct acpi_battery *battery = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -0400845 return -EINVAL;
Burman Yan36bcbec2006-12-19 12:56:11 -0800846 battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 if (!battery)
Patrick Mocheld550d982006-06-27 00:41:40 -0400848 return -ENOMEM;
Patrick Mochel145def82006-05-19 16:54:39 -0400849 battery->device = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
851 strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
Pavel Machekdb89b4f2008-09-22 14:37:34 -0700852 device->driver_data = battery;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400853 mutex_init(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400854 acpi_battery_update(battery);
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300855#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 result = acpi_battery_add_fs(device);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400857#endif
Len Brown586caae2009-06-18 00:38:27 -0400858 if (!result) {
859 printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
860 ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
861 device->status.battery_present ? "present" : "absent");
862 } else {
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300863#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 acpi_battery_remove_fs(device);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400865#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 kfree(battery);
867 }
Patrick Mocheld550d982006-06-27 00:41:40 -0400868 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869}
870
Len Brown4be44fc2005-08-05 00:44:28 -0400871static int acpi_battery_remove(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872{
Len Brown4be44fc2005-08-05 00:44:28 -0400873 struct acpi_battery *battery = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400876 return -EINVAL;
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200877 battery = acpi_driver_data(device);
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300878#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 acpi_battery_remove_fs(device);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400880#endif
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500881#ifdef CONFIG_ACPI_SYSFS_POWER
Andrey Borzenkov508df922007-10-28 12:50:09 +0300882 sysfs_remove_battery(battery);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500883#endif
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400884 mutex_destroy(&battery->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885 kfree(battery);
Patrick Mocheld550d982006-06-27 00:41:40 -0400886 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887}
888
Jiri Kosina34c44152006-10-10 14:20:41 -0700889/* this is needed to learn about changes made in suspended state */
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800890static int acpi_battery_resume(struct acpi_device *device)
Jiri Kosina34c44152006-10-10 14:20:41 -0700891{
892 struct acpi_battery *battery;
Jiri Kosina34c44152006-10-10 14:20:41 -0700893 if (!device)
894 return -EINVAL;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400895 battery = acpi_driver_data(device);
896 battery->update_time = 0;
Andrey Borzenkov508df922007-10-28 12:50:09 +0300897 acpi_battery_update(battery);
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300898 return 0;
Jiri Kosina34c44152006-10-10 14:20:41 -0700899}
900
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400901static struct acpi_driver acpi_battery_driver = {
902 .name = "battery",
903 .class = ACPI_BATTERY_CLASS,
904 .ids = battery_device_ids,
Bjorn Helgaasd9406692009-04-30 09:35:47 -0600905 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400906 .ops = {
907 .add = acpi_battery_add,
908 .resume = acpi_battery_resume,
909 .remove = acpi_battery_remove,
Bjorn Helgaasd9406692009-04-30 09:35:47 -0600910 .notify = acpi_battery_notify,
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400911 },
912};
913
Linus Torvaldsb0cbc862009-04-11 12:45:20 -0700914static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915{
Pavel Machek4d8316d2006-08-14 22:37:22 -0700916 if (acpi_disabled)
Arjan van de Ven0f66af52009-01-10 14:19:05 -0500917 return;
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300918#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400919 acpi_battery_dir = acpi_lock_battery_dir();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 if (!acpi_battery_dir)
Arjan van de Ven0f66af52009-01-10 14:19:05 -0500921 return;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400922#endif
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400923 if (acpi_bus_register_driver(&acpi_battery_driver) < 0) {
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300924#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400925 acpi_unlock_battery_dir(acpi_battery_dir);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400926#endif
Arjan van de Ven0f66af52009-01-10 14:19:05 -0500927 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 }
Arjan van de Ven0f66af52009-01-10 14:19:05 -0500929 return;
930}
931
932static int __init acpi_battery_init(void)
933{
934 async_schedule(acpi_battery_init_async, NULL);
Patrick Mocheld550d982006-06-27 00:41:40 -0400935 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936}
937
Len Brown4be44fc2005-08-05 00:44:28 -0400938static void __exit acpi_battery_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 acpi_bus_unregister_driver(&acpi_battery_driver);
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300941#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400942 acpi_unlock_battery_dir(acpi_battery_dir);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400943#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944}
945
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946module_init(acpi_battery_init);
947module_exit(acpi_battery_exit);