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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
34#ifdef CONFIG_ACPI_PROCFS
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 Starikovskiyd7380962007-09-26 19:43:04 +040043#include <linux/power_supply.h>
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
46
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#define ACPI_BATTERY_COMPONENT 0x00040000
48#define ACPI_BATTERY_CLASS "battery"
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#define ACPI_BATTERY_DEVICE_NAME "Battery"
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#define ACPI_BATTERY_NOTIFY_STATUS 0x80
51#define ACPI_BATTERY_NOTIFY_INFO 0x81
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#define _COMPONENT ACPI_BATTERY_COMPONENT
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +030054
Len Brownf52fd662007-02-12 22:42:12 -050055ACPI_MODULE_NAME("battery");
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
Len Brownf52fd662007-02-12 22:42:12 -050057MODULE_AUTHOR("Paul Diefenbaugh");
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +040058MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
Len Brown7cda93e2007-02-12 23:50:02 -050059MODULE_DESCRIPTION("ACPI Battery Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -070060MODULE_LICENSE("GPL");
61
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +040062static unsigned int cache_time = 1000;
63module_param(cache_time, uint, 0644);
64MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +030065
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040066#ifdef CONFIG_ACPI_PROCFS
Rich Townsend3f86b832006-07-01 11:36:54 -040067extern struct proc_dir_entry *acpi_lock_battery_dir(void);
68extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
69
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +040070enum acpi_battery_files {
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +040071 info_tag = 0,
72 state_tag,
73 alarm_tag,
Alexey Starikovskiy78490d82007-05-11 13:18:55 -040074 ACPI_BATTERY_NUMFILES,
75};
76
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040077#endif
78
79static const struct acpi_device_id battery_device_ids[] = {
80 {"PNP0C0A", 0},
81 {"", 0},
82};
83
84MODULE_DEVICE_TABLE(acpi, battery_device_ids);
85
86
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +040087struct acpi_battery {
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +040088 struct mutex lock;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040089 struct power_supply bat;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +040090 struct acpi_device *device;
91 unsigned long update_time;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040092 int current_now;
93 int capacity_now;
94 int voltage_now;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +040095 int design_capacity;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +040096 int full_charge_capacity;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +040097 int technology;
98 int design_voltage;
99 int design_capacity_warning;
100 int design_capacity_low;
101 int capacity_granularity_1;
102 int capacity_granularity_2;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400103 int alarm;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400104 char model_number[32];
105 char serial_number[32];
106 char type[32];
107 char oem_info[32];
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400108 int state;
109 int power_unit;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300110 u8 alarm_present;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111};
112
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400113#define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
114
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400115inline int acpi_battery_present(struct acpi_battery *battery)
116{
117 return battery->device->status.battery_present;
118}
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400119
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400120static int acpi_battery_technology(struct acpi_battery *battery)
121{
122 if (!strcasecmp("NiCd", battery->type))
123 return POWER_SUPPLY_TECHNOLOGY_NiCd;
124 if (!strcasecmp("NiMH", battery->type))
125 return POWER_SUPPLY_TECHNOLOGY_NiMH;
126 if (!strcasecmp("LION", battery->type))
127 return POWER_SUPPLY_TECHNOLOGY_LION;
Alexey Starikovskiy0bde7ee2007-10-28 15:33:10 +0300128 if (!strcasecmp("LI-ION", battery->type))
129 return POWER_SUPPLY_TECHNOLOGY_LION;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400130 if (!strcasecmp("LiP", battery->type))
131 return POWER_SUPPLY_TECHNOLOGY_LIPO;
132 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
133}
134
Alexey Starikovskiyb19073a2007-10-25 17:10:47 -0400135static int acpi_battery_update(struct acpi_battery *battery);
136
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400137static int acpi_battery_get_property(struct power_supply *psy,
138 enum power_supply_property psp,
139 union power_supply_propval *val)
140{
141 struct acpi_battery *battery = to_acpi_battery(psy);
142
143 if ((!acpi_battery_present(battery)) &&
144 psp != POWER_SUPPLY_PROP_PRESENT)
145 return -ENODEV;
Alexey Starikovskiyb19073a2007-10-25 17:10:47 -0400146 acpi_battery_update(battery);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400147 switch (psp) {
148 case POWER_SUPPLY_PROP_STATUS:
149 if (battery->state & 0x01)
150 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
151 else if (battery->state & 0x02)
152 val->intval = POWER_SUPPLY_STATUS_CHARGING;
153 else if (battery->state == 0)
154 val->intval = POWER_SUPPLY_STATUS_FULL;
Roland Dreier4c41d3a2007-11-07 15:09:09 -0800155 else
156 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400157 break;
158 case POWER_SUPPLY_PROP_PRESENT:
159 val->intval = acpi_battery_present(battery);
160 break;
161 case POWER_SUPPLY_PROP_TECHNOLOGY:
162 val->intval = acpi_battery_technology(battery);
163 break;
164 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
165 val->intval = battery->design_voltage * 1000;
166 break;
167 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
168 val->intval = battery->voltage_now * 1000;
169 break;
170 case POWER_SUPPLY_PROP_CURRENT_NOW:
171 val->intval = battery->current_now * 1000;
172 break;
173 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
174 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
175 val->intval = battery->design_capacity * 1000;
176 break;
177 case POWER_SUPPLY_PROP_CHARGE_FULL:
178 case POWER_SUPPLY_PROP_ENERGY_FULL:
179 val->intval = battery->full_charge_capacity * 1000;
180 break;
181 case POWER_SUPPLY_PROP_CHARGE_NOW:
182 case POWER_SUPPLY_PROP_ENERGY_NOW:
183 val->intval = battery->capacity_now * 1000;
184 break;
185 case POWER_SUPPLY_PROP_MODEL_NAME:
186 val->strval = battery->model_number;
187 break;
188 case POWER_SUPPLY_PROP_MANUFACTURER:
189 val->strval = battery->oem_info;
190 break;
191 default:
192 return -EINVAL;
193 }
194 return 0;
195}
196
197static enum power_supply_property charge_battery_props[] = {
198 POWER_SUPPLY_PROP_STATUS,
199 POWER_SUPPLY_PROP_PRESENT,
200 POWER_SUPPLY_PROP_TECHNOLOGY,
201 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
202 POWER_SUPPLY_PROP_VOLTAGE_NOW,
203 POWER_SUPPLY_PROP_CURRENT_NOW,
204 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
205 POWER_SUPPLY_PROP_CHARGE_FULL,
206 POWER_SUPPLY_PROP_CHARGE_NOW,
207 POWER_SUPPLY_PROP_MODEL_NAME,
208 POWER_SUPPLY_PROP_MANUFACTURER,
209};
210
211static enum power_supply_property energy_battery_props[] = {
212 POWER_SUPPLY_PROP_STATUS,
213 POWER_SUPPLY_PROP_PRESENT,
214 POWER_SUPPLY_PROP_TECHNOLOGY,
215 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
216 POWER_SUPPLY_PROP_VOLTAGE_NOW,
217 POWER_SUPPLY_PROP_CURRENT_NOW,
218 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
219 POWER_SUPPLY_PROP_ENERGY_FULL,
220 POWER_SUPPLY_PROP_ENERGY_NOW,
221 POWER_SUPPLY_PROP_MODEL_NAME,
222 POWER_SUPPLY_PROP_MANUFACTURER,
223};
224
225#ifdef CONFIG_ACPI_PROCFS
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400226inline char *acpi_battery_units(struct acpi_battery *battery)
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400227{
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400228 return (battery->power_unit)?"mA":"mW";
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400229}
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400230#endif
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300231
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232/* --------------------------------------------------------------------------
233 Battery Management
234 -------------------------------------------------------------------------- */
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400235struct acpi_offsets {
236 size_t offset; /* offset inside struct acpi_sbs_battery */
237 u8 mode; /* int or string? */
238};
239
240static struct acpi_offsets state_offsets[] = {
241 {offsetof(struct acpi_battery, state), 0},
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400242 {offsetof(struct acpi_battery, current_now), 0},
243 {offsetof(struct acpi_battery, capacity_now), 0},
244 {offsetof(struct acpi_battery, voltage_now), 0},
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400245};
246
247static struct acpi_offsets info_offsets[] = {
248 {offsetof(struct acpi_battery, power_unit), 0},
249 {offsetof(struct acpi_battery, design_capacity), 0},
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400250 {offsetof(struct acpi_battery, full_charge_capacity), 0},
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400251 {offsetof(struct acpi_battery, technology), 0},
252 {offsetof(struct acpi_battery, design_voltage), 0},
253 {offsetof(struct acpi_battery, design_capacity_warning), 0},
254 {offsetof(struct acpi_battery, design_capacity_low), 0},
255 {offsetof(struct acpi_battery, capacity_granularity_1), 0},
256 {offsetof(struct acpi_battery, capacity_granularity_2), 0},
257 {offsetof(struct acpi_battery, model_number), 1},
258 {offsetof(struct acpi_battery, serial_number), 1},
259 {offsetof(struct acpi_battery, type), 1},
260 {offsetof(struct acpi_battery, oem_info), 1},
261};
262
263static int extract_package(struct acpi_battery *battery,
264 union acpi_object *package,
265 struct acpi_offsets *offsets, int num)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300266{
Alexey Starikovskiy106449e2007-10-29 23:29:40 +0300267 int i;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400268 union acpi_object *element;
269 if (package->type != ACPI_TYPE_PACKAGE)
270 return -EFAULT;
271 for (i = 0; i < num; ++i) {
272 if (package->package.count <= i)
273 return -EFAULT;
274 element = &package->package.elements[i];
275 if (offsets[i].mode) {
Alexey Starikovskiy106449e2007-10-29 23:29:40 +0300276 u8 *ptr = (u8 *)battery + offsets[i].offset;
277 if (element->type == ACPI_TYPE_STRING ||
278 element->type == ACPI_TYPE_BUFFER)
279 strncpy(ptr, element->string.pointer, 32);
280 else if (element->type == ACPI_TYPE_INTEGER) {
281 strncpy(ptr, (u8 *)&element->integer.value,
282 sizeof(acpi_integer));
283 ptr[sizeof(acpi_integer)] = 0;
284 } else return -EFAULT;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400285 } else {
Alexey Starikovskiy106449e2007-10-29 23:29:40 +0300286 if (element->type == ACPI_TYPE_INTEGER) {
287 int *x = (int *)((u8 *)battery +
288 offsets[i].offset);
289 *x = element->integer.value;
290 } else return -EFAULT;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300291 }
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300292 }
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300293 return 0;
294}
295
296static int acpi_battery_get_status(struct acpi_battery *battery)
297{
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400298 if (acpi_bus_get_status(battery->device)) {
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300299 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA"));
300 return -ENODEV;
301 }
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400302 return 0;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300303}
304
305static int acpi_battery_get_info(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306{
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400307 int result = -EFAULT;
Len Brown4be44fc2005-08-05 00:44:28 -0400308 acpi_status status = 0;
309 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300311 if (!acpi_battery_present(battery))
312 return 0;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400313 mutex_lock(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400314 status = acpi_evaluate_object(battery->device->handle, "_BIF",
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400315 NULL, &buffer);
316 mutex_unlock(&battery->lock);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400317
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 if (ACPI_FAILURE(status)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400319 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400320 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 }
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400322
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400323 result = extract_package(battery, buffer.pointer,
324 info_offsets, ARRAY_SIZE(info_offsets));
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400325 kfree(buffer.pointer);
Patrick Mocheld550d982006-06-27 00:41:40 -0400326 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327}
328
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300329static int acpi_battery_get_state(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330{
Len Brown4be44fc2005-08-05 00:44:28 -0400331 int result = 0;
332 acpi_status status = 0;
333 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300335 if (!acpi_battery_present(battery))
336 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400338 if (battery->update_time &&
339 time_before(jiffies, battery->update_time +
340 msecs_to_jiffies(cache_time)))
341 return 0;
342
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400343 mutex_lock(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400344 status = acpi_evaluate_object(battery->device->handle, "_BST",
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400345 NULL, &buffer);
346 mutex_unlock(&battery->lock);
Len Brown5b31d892007-08-15 00:19:26 -0400347
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 if (ACPI_FAILURE(status)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400349 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400350 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 }
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400352
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400353 result = extract_package(battery, buffer.pointer,
354 state_offsets, ARRAY_SIZE(state_offsets));
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400355 battery->update_time = jiffies;
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400356 kfree(buffer.pointer);
Patrick Mocheld550d982006-06-27 00:41:40 -0400357 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358}
359
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400360static int acpi_battery_set_alarm(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361{
Len Brown4be44fc2005-08-05 00:44:28 -0400362 acpi_status status = 0;
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400363 union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER };
Len Brown4be44fc2005-08-05 00:44:28 -0400364 struct acpi_object_list arg_list = { 1, &arg0 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400366 if (!acpi_battery_present(battery)|| !battery->alarm_present)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300367 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400369 arg0.integer.value = battery->alarm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400371 mutex_lock(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400372 status = acpi_evaluate_object(battery->device->handle, "_BTP",
373 &arg_list, NULL);
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400374 mutex_unlock(&battery->lock);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400375
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400377 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400379 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm));
Patrick Mocheld550d982006-06-27 00:41:40 -0400380 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381}
382
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300383static int acpi_battery_init_alarm(struct acpi_battery *battery)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384{
Len Brown4be44fc2005-08-05 00:44:28 -0400385 acpi_status status = AE_OK;
386 acpi_handle handle = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300388 /* See if alarms are supported, and if so, set default */
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400389 status = acpi_get_handle(battery->device->handle, "_BTP", &handle);
390 if (ACPI_FAILURE(status)) {
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400391 battery->alarm_present = 0;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400392 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 }
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400394 battery->alarm_present = 1;
395 if (!battery->alarm)
396 battery->alarm = battery->design_capacity_warning;
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400397 return acpi_battery_set_alarm(battery);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398}
399
Andrey Borzenkov508df922007-10-28 12:50:09 +0300400static ssize_t acpi_battery_alarm_show(struct device *dev,
401 struct device_attribute *attr,
402 char *buf)
403{
404 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
405 return sprintf(buf, "%d\n", battery->alarm * 1000);
406}
407
408static ssize_t acpi_battery_alarm_store(struct device *dev,
409 struct device_attribute *attr,
410 const char *buf, size_t count)
411{
412 unsigned long x;
413 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
414 if (sscanf(buf, "%ld\n", &x) == 1)
415 battery->alarm = x/1000;
416 if (acpi_battery_present(battery))
417 acpi_battery_set_alarm(battery);
418 return count;
419}
420
421static struct device_attribute alarm_attr = {
422 .attr = {.name = "alarm", .mode = 0644, .owner = THIS_MODULE},
423 .show = acpi_battery_alarm_show,
424 .store = acpi_battery_alarm_store,
425};
426
427static int sysfs_add_battery(struct acpi_battery *battery)
428{
429 int result;
430
431 battery->update_time = 0;
432 result = acpi_battery_get_info(battery);
433 acpi_battery_init_alarm(battery);
434 if (result)
435 return result;
436 if (battery->power_unit) {
437 battery->bat.properties = charge_battery_props;
438 battery->bat.num_properties =
439 ARRAY_SIZE(charge_battery_props);
440 } else {
441 battery->bat.properties = energy_battery_props;
442 battery->bat.num_properties =
443 ARRAY_SIZE(energy_battery_props);
444 }
445
446 battery->bat.name = acpi_device_bid(battery->device);
447 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
448 battery->bat.get_property = acpi_battery_get_property;
449
450 result = power_supply_register(&battery->device->dev, &battery->bat);
451 if (result)
452 return result;
453 return device_create_file(battery->bat.dev, &alarm_attr);
454}
455
456static void sysfs_remove_battery(struct acpi_battery *battery)
457{
458 if (!battery->bat.dev)
459 return;
460 device_remove_file(battery->bat.dev, &alarm_attr);
461 power_supply_unregister(&battery->bat);
462}
463
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400464static int acpi_battery_update(struct acpi_battery *battery)
Vladimir Lebedev4bd35cd2007-02-10 01:43:48 -0500465{
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400466 int result = acpi_battery_get_status(battery);
Andrey Borzenkov508df922007-10-28 12:50:09 +0300467 if (result)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300468 return result;
Andrey Borzenkov508df922007-10-28 12:50:09 +0300469 if (!acpi_battery_present(battery)) {
470 sysfs_remove_battery(battery);
471 return 0;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300472 }
Andrey Borzenkov508df922007-10-28 12:50:09 +0300473 if (!battery->bat.dev)
474 sysfs_add_battery(battery);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400475 return acpi_battery_get_state(battery);
Vladimir Lebedev4bd35cd2007-02-10 01:43:48 -0500476}
477
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478/* --------------------------------------------------------------------------
479 FS Interface (/proc)
480 -------------------------------------------------------------------------- */
481
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400482#ifdef CONFIG_ACPI_PROCFS
Len Brown4be44fc2005-08-05 00:44:28 -0400483static struct proc_dir_entry *acpi_battery_dir;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300484
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400485static int acpi_battery_print_info(struct seq_file *seq, int result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200487 struct acpi_battery *battery = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300489 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 goto end;
491
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400492 seq_printf(seq, "present: %s\n",
493 acpi_battery_present(battery)?"yes":"no");
494 if (!acpi_battery_present(battery))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 goto end;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400496 if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 seq_printf(seq, "design capacity: unknown\n");
498 else
499 seq_printf(seq, "design capacity: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400500 battery->design_capacity,
501 acpi_battery_units(battery));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400503 if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 seq_printf(seq, "last full capacity: unknown\n");
505 else
506 seq_printf(seq, "last full capacity: %d %sh\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400507 battery->full_charge_capacity,
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400508 acpi_battery_units(battery));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400510 seq_printf(seq, "battery technology: %srechargeable\n",
511 (!battery->technology)?"non-":"");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400513 if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 seq_printf(seq, "design voltage: unknown\n");
515 else
516 seq_printf(seq, "design voltage: %d mV\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400517 battery->design_voltage);
Len Brown4be44fc2005-08-05 00:44:28 -0400518 seq_printf(seq, "design capacity warning: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400519 battery->design_capacity_warning,
520 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400521 seq_printf(seq, "design capacity low: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400522 battery->design_capacity_low,
523 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400524 seq_printf(seq, "capacity granularity 1: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400525 battery->capacity_granularity_1,
526 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400527 seq_printf(seq, "capacity granularity 2: %d %sh\n",
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400528 battery->capacity_granularity_2,
529 acpi_battery_units(battery));
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400530 seq_printf(seq, "model number: %s\n", battery->model_number);
531 seq_printf(seq, "serial number: %s\n", battery->serial_number);
532 seq_printf(seq, "battery type: %s\n", battery->type);
533 seq_printf(seq, "OEM info: %s\n", battery->oem_info);
Len Brown4be44fc2005-08-05 00:44:28 -0400534 end:
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300535 if (result)
536 seq_printf(seq, "ERROR: Unable to read battery info\n");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300537 return result;
538}
539
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400540static int acpi_battery_print_state(struct seq_file *seq, int result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200542 struct acpi_battery *battery = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300544 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 goto end;
546
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400547 seq_printf(seq, "present: %s\n",
548 acpi_battery_present(battery)?"yes":"no");
549 if (!acpi_battery_present(battery))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400552 seq_printf(seq, "capacity state: %s\n",
553 (battery->state & 0x04)?"critical":"ok");
554 if ((battery->state & 0x01) && (battery->state & 0x02))
Len Brown4be44fc2005-08-05 00:44:28 -0400555 seq_printf(seq,
556 "charging state: charging/discharging\n");
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400557 else if (battery->state & 0x01)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 seq_printf(seq, "charging state: discharging\n");
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400559 else if (battery->state & 0x02)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 seq_printf(seq, "charging state: charging\n");
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400561 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 seq_printf(seq, "charging state: charged\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400564 if (battery->current_now == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 seq_printf(seq, "present rate: unknown\n");
566 else
567 seq_printf(seq, "present rate: %d %s\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400568 battery->current_now, acpi_battery_units(battery));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400570 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 seq_printf(seq, "remaining capacity: unknown\n");
572 else
573 seq_printf(seq, "remaining capacity: %d %sh\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400574 battery->capacity_now, acpi_battery_units(battery));
575 if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 seq_printf(seq, "present voltage: unknown\n");
577 else
578 seq_printf(seq, "present voltage: %d mV\n",
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400579 battery->voltage_now);
Len Brown4be44fc2005-08-05 00:44:28 -0400580 end:
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400581 if (result)
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300582 seq_printf(seq, "ERROR: Unable to read battery state\n");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300583
584 return result;
585}
586
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400587static int acpi_battery_print_alarm(struct seq_file *seq, int result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200589 struct acpi_battery *battery = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300591 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 goto end;
593
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300594 if (!acpi_battery_present(battery)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 seq_printf(seq, "present: no\n");
596 goto end;
597 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 seq_printf(seq, "alarm: ");
599 if (!battery->alarm)
600 seq_printf(seq, "unsupported\n");
601 else
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400602 seq_printf(seq, "%u %sh\n", battery->alarm,
603 acpi_battery_units(battery));
Len Brown4be44fc2005-08-05 00:44:28 -0400604 end:
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300605 if (result)
606 seq_printf(seq, "ERROR: Unable to read battery alarm\n");
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300607 return result;
608}
609
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400610static ssize_t acpi_battery_write_alarm(struct file *file,
611 const char __user * buffer,
612 size_t count, loff_t * ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613{
Len Brown4be44fc2005-08-05 00:44:28 -0400614 int result = 0;
615 char alarm_string[12] = { '\0' };
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200616 struct seq_file *m = file->private_data;
617 struct acpi_battery *battery = m->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 if (!battery || (count > sizeof(alarm_string) - 1))
Patrick Mocheld550d982006-06-27 00:41:40 -0400620 return -EINVAL;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300621 if (!acpi_battery_present(battery)) {
622 result = -ENODEV;
623 goto end;
624 }
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300625 if (copy_from_user(alarm_string, buffer, count)) {
626 result = -EFAULT;
627 goto end;
628 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 alarm_string[count] = '\0';
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400630 battery->alarm = simple_strtol(alarm_string, NULL, 0);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400631 result = acpi_battery_set_alarm(battery);
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300632 end:
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300633 if (!result)
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400634 return count;
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300635 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636}
637
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400638typedef int(*print_func)(struct seq_file *seq, int result);
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400639
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400640static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = {
641 acpi_battery_print_info,
642 acpi_battery_print_state,
643 acpi_battery_print_alarm,
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400644};
645
646static int acpi_battery_read(int fid, struct seq_file *seq)
647{
648 struct acpi_battery *battery = seq->private;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400649 int result = acpi_battery_update(battery);
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400650 return acpi_print_funcs[fid](seq, result);
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400651}
652
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400653#define DECLARE_FILE_FUNCTIONS(_name) \
654static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \
655{ \
656 return acpi_battery_read(_name##_tag, seq); \
657} \
658static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \
659{ \
660 return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400661}
662
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400663DECLARE_FILE_FUNCTIONS(info);
664DECLARE_FILE_FUNCTIONS(state);
665DECLARE_FILE_FUNCTIONS(alarm);
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400666
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400667#undef DECLARE_FILE_FUNCTIONS
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400668
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400669#define FILE_DESCRIPTION_RO(_name) \
670 { \
671 .name = __stringify(_name), \
672 .mode = S_IRUGO, \
673 .ops = { \
674 .open = acpi_battery_##_name##_open_fs, \
675 .read = seq_read, \
676 .llseek = seq_lseek, \
677 .release = single_release, \
678 .owner = THIS_MODULE, \
679 }, \
680 }
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400681
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400682#define FILE_DESCRIPTION_RW(_name) \
683 { \
684 .name = __stringify(_name), \
685 .mode = S_IFREG | S_IRUGO | S_IWUSR, \
686 .ops = { \
687 .open = acpi_battery_##_name##_open_fs, \
688 .read = seq_read, \
689 .llseek = seq_lseek, \
690 .write = acpi_battery_write_##_name, \
691 .release = single_release, \
692 .owner = THIS_MODULE, \
693 }, \
694 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400696static struct battery_file {
697 struct file_operations ops;
698 mode_t mode;
699 char *name;
700} acpi_battery_file[] = {
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400701 FILE_DESCRIPTION_RO(info),
702 FILE_DESCRIPTION_RO(state),
703 FILE_DESCRIPTION_RW(alarm),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704};
705
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400706#undef FILE_DESCRIPTION_RO
707#undef FILE_DESCRIPTION_RW
708
Len Brown4be44fc2005-08-05 00:44:28 -0400709static int acpi_battery_add_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710{
Len Brown4be44fc2005-08-05 00:44:28 -0400711 struct proc_dir_entry *entry = NULL;
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400712 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 if (!acpi_device_dir(device)) {
715 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
Len Brown4be44fc2005-08-05 00:44:28 -0400716 acpi_battery_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 if (!acpi_device_dir(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400718 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 acpi_device_dir(device)->owner = THIS_MODULE;
720 }
721
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400722 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) {
723 entry = create_proc_entry(acpi_battery_file[i].name,
724 acpi_battery_file[i].mode, acpi_device_dir(device));
725 if (!entry)
726 return -ENODEV;
727 else {
728 entry->proc_fops = &acpi_battery_file[i].ops;
729 entry->data = acpi_driver_data(device);
730 entry->owner = THIS_MODULE;
731 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 }
Patrick Mocheld550d982006-06-27 00:41:40 -0400733 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734}
735
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400736static void acpi_battery_remove_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737{
Alexey Starikovskiy78490d82007-05-11 13:18:55 -0400738 int i;
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400739 if (!acpi_device_dir(device))
740 return;
741 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i)
742 remove_proc_entry(acpi_battery_file[i].name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 acpi_device_dir(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400745 remove_proc_entry(acpi_device_bid(device), acpi_battery_dir);
746 acpi_device_dir(device) = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747}
748
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400749#endif
Alexey Starikovskiy3e58ea02007-09-26 19:43:11 +0400750
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751/* --------------------------------------------------------------------------
752 Driver Interface
753 -------------------------------------------------------------------------- */
754
Len Brown4be44fc2005-08-05 00:44:28 -0400755static void acpi_battery_notify(acpi_handle handle, u32 event, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200757 struct acpi_battery *battery = data;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400758 struct acpi_device *device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 if (!battery)
Patrick Mocheld550d982006-06-27 00:41:40 -0400760 return;
Patrick Mochel145def82006-05-19 16:54:39 -0400761 device = battery->device;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400762 acpi_battery_update(battery);
763 acpi_bus_generate_proc_event(device, event,
764 acpi_battery_present(battery));
765 acpi_bus_generate_netlink_event(device->pnp.device_class,
766 device->dev.bus_id, event,
Vladimir Lebedev9ea7d572007-02-20 15:48:06 +0300767 acpi_battery_present(battery));
Andrey Borzenkov508df922007-10-28 12:50:09 +0300768 /* acpi_batter_update could remove power_supply object */
769 if (battery->bat.dev)
770 kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771}
772
Len Brown4be44fc2005-08-05 00:44:28 -0400773static int acpi_battery_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774{
Len Brown4be44fc2005-08-05 00:44:28 -0400775 int result = 0;
776 acpi_status status = 0;
777 struct acpi_battery *battery = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -0400779 return -EINVAL;
Burman Yan36bcbec2006-12-19 12:56:11 -0800780 battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 if (!battery)
Patrick Mocheld550d982006-06-27 00:41:40 -0400782 return -ENOMEM;
Patrick Mochel145def82006-05-19 16:54:39 -0400783 battery->device = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
785 strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
786 acpi_driver_data(device) = battery;
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400787 mutex_init(&battery->lock);
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400788 acpi_battery_update(battery);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400789#ifdef CONFIG_ACPI_PROCFS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790 result = acpi_battery_add_fs(device);
791 if (result)
792 goto end;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400793#endif
Patrick Mochel3b073ec2006-05-19 16:54:41 -0400794 status = acpi_install_notify_handler(device->handle,
Vladimir Lebedev9fdae722006-06-27 04:49:00 -0400795 ACPI_ALL_NOTIFY,
Len Brown4be44fc2005-08-05 00:44:28 -0400796 acpi_battery_notify, battery);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 if (ACPI_FAILURE(status)) {
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300798 ACPI_EXCEPTION((AE_INFO, status, "Installing notify handler"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 result = -ENODEV;
800 goto end;
801 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400803 ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
804 device->status.battery_present ? "present" : "absent");
Len Brown4be44fc2005-08-05 00:44:28 -0400805 end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 if (result) {
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400807#ifdef CONFIG_ACPI_PROCFS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 acpi_battery_remove_fs(device);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400809#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 kfree(battery);
811 }
Patrick Mocheld550d982006-06-27 00:41:40 -0400812 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813}
814
Len Brown4be44fc2005-08-05 00:44:28 -0400815static int acpi_battery_remove(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816{
Len Brown4be44fc2005-08-05 00:44:28 -0400817 acpi_status status = 0;
818 struct acpi_battery *battery = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400821 return -EINVAL;
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200822 battery = acpi_driver_data(device);
Patrick Mochel3b073ec2006-05-19 16:54:41 -0400823 status = acpi_remove_notify_handler(device->handle,
Vladimir Lebedev9fdae722006-06-27 04:49:00 -0400824 ACPI_ALL_NOTIFY,
Len Brown4be44fc2005-08-05 00:44:28 -0400825 acpi_battery_notify);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400826#ifdef CONFIG_ACPI_PROCFS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827 acpi_battery_remove_fs(device);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400828#endif
Andrey Borzenkov508df922007-10-28 12:50:09 +0300829 sysfs_remove_battery(battery);
Alexey Starikovskiy038fdea2007-09-26 19:42:46 +0400830 mutex_destroy(&battery->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 kfree(battery);
Patrick Mocheld550d982006-06-27 00:41:40 -0400832 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833}
834
Jiri Kosina34c44152006-10-10 14:20:41 -0700835/* this is needed to learn about changes made in suspended state */
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800836static int acpi_battery_resume(struct acpi_device *device)
Jiri Kosina34c44152006-10-10 14:20:41 -0700837{
838 struct acpi_battery *battery;
Jiri Kosina34c44152006-10-10 14:20:41 -0700839 if (!device)
840 return -EINVAL;
Alexey Starikovskiyf1d46612007-09-26 19:42:52 +0400841 battery = acpi_driver_data(device);
842 battery->update_time = 0;
Andrey Borzenkov508df922007-10-28 12:50:09 +0300843 acpi_battery_update(battery);
Vladimir Lebedevb6ce4082007-02-20 15:48:06 +0300844 return 0;
Jiri Kosina34c44152006-10-10 14:20:41 -0700845}
846
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400847static struct acpi_driver acpi_battery_driver = {
848 .name = "battery",
849 .class = ACPI_BATTERY_CLASS,
850 .ids = battery_device_ids,
851 .ops = {
852 .add = acpi_battery_add,
853 .resume = acpi_battery_resume,
854 .remove = acpi_battery_remove,
855 },
856};
857
Len Brown4be44fc2005-08-05 00:44:28 -0400858static int __init acpi_battery_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859{
Pavel Machek4d8316d2006-08-14 22:37:22 -0700860 if (acpi_disabled)
861 return -ENODEV;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400862#ifdef CONFIG_ACPI_PROCFS
Rich Townsend3f86b832006-07-01 11:36:54 -0400863 acpi_battery_dir = acpi_lock_battery_dir();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 if (!acpi_battery_dir)
Patrick Mocheld550d982006-06-27 00:41:40 -0400865 return -ENODEV;
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400866#endif
Alexey Starikovskiyaa650bb2007-09-26 19:42:58 +0400867 if (acpi_bus_register_driver(&acpi_battery_driver) < 0) {
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400868#ifdef CONFIG_ACPI_PROCFS
Rich Townsend3f86b832006-07-01 11:36:54 -0400869 acpi_unlock_battery_dir(acpi_battery_dir);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400870#endif
Patrick Mocheld550d982006-06-27 00:41:40 -0400871 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 }
Patrick Mocheld550d982006-06-27 00:41:40 -0400873 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874}
875
Len Brown4be44fc2005-08-05 00:44:28 -0400876static void __exit acpi_battery_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 acpi_bus_unregister_driver(&acpi_battery_driver);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400879#ifdef CONFIG_ACPI_PROCFS
Rich Townsend3f86b832006-07-01 11:36:54 -0400880 acpi_unlock_battery_dir(acpi_battery_dir);
Alexey Starikovskiyd7380962007-09-26 19:43:04 +0400881#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882}
883
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884module_init(acpi_battery_init);
885module_exit(acpi_battery_exit);