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CommitLineData
1da177e4
LT
1/*
2 * acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
3 *
4 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or (at
12 * your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26#include <linux/kernel.h>
27#include <linux/module.h>
28#include <linux/init.h>
29#include <linux/types.h>
fdcedbba 30#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4
LT
31#include <linux/proc_fs.h>
32#include <linux/seq_file.h>
8a246ee4 33#endif
97749cd9 34#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0 35#include <linux/power_supply.h>
97749cd9 36#endif
1da177e4
LT
37#include <acpi/acpi_bus.h>
38#include <acpi/acpi_drivers.h>
39
1da177e4
LT
40#define ACPI_AC_COMPONENT 0x00020000
41#define ACPI_AC_CLASS "ac_adapter"
1da177e4
LT
42#define ACPI_AC_DEVICE_NAME "AC Adapter"
43#define ACPI_AC_FILE_STATE "state"
44#define ACPI_AC_NOTIFY_STATUS 0x80
45#define ACPI_AC_STATUS_OFFLINE 0x00
46#define ACPI_AC_STATUS_ONLINE 0x01
47#define ACPI_AC_STATUS_UNKNOWN 0xFF
48
49#define _COMPONENT ACPI_AC_COMPONENT
f52fd66d 50ACPI_MODULE_NAME("ac");
1da177e4 51
f52fd66d 52MODULE_AUTHOR("Paul Diefenbaugh");
7cda93e0 53MODULE_DESCRIPTION("ACPI AC Adapter Driver");
1da177e4
LT
54MODULE_LICENSE("GPL");
55
fdcedbba 56#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832
RT
57extern struct proc_dir_entry *acpi_lock_ac_dir(void);
58extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
8a246ee4
AB
59static int acpi_ac_open_fs(struct inode *inode, struct file *file);
60#endif
3f86b832 61
4be44fcd
LB
62static int acpi_ac_add(struct acpi_device *device);
63static int acpi_ac_remove(struct acpi_device *device, int type);
5bfeca31 64static int acpi_ac_resume(struct acpi_device *device);
1da177e4 65
b299c22c 66static const struct acpi_device_id ac_device_ids[] = {
1ba90e3a
TR
67 {"ACPI0003", 0},
68 {"", 0},
69};
70MODULE_DEVICE_TABLE(acpi, ac_device_ids);
71
1da177e4 72static struct acpi_driver acpi_ac_driver = {
c2b6705b 73 .name = "ac",
4be44fcd 74 .class = ACPI_AC_CLASS,
1ba90e3a 75 .ids = ac_device_ids,
4be44fcd
LB
76 .ops = {
77 .add = acpi_ac_add,
78 .remove = acpi_ac_remove,
5bfeca31 79 .resume = acpi_ac_resume,
4be44fcd 80 },
1da177e4
LT
81};
82
83struct acpi_ac {
97749cd9 84#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0 85 struct power_supply charger;
97749cd9 86#endif
af96179a 87 struct acpi_device * device;
4be44fcd 88 unsigned long state;
1da177e4
LT
89};
90
d5b4a3d0
AS
91#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
92
fdcedbba 93#ifdef CONFIG_ACPI_PROCFS_POWER
d7508032 94static const struct file_operations acpi_ac_fops = {
cf7acfab 95 .owner = THIS_MODULE,
4be44fcd
LB
96 .open = acpi_ac_open_fs,
97 .read = seq_read,
98 .llseek = seq_lseek,
99 .release = single_release,
1da177e4 100};
8a246ee4 101#endif
97749cd9 102#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0
AS
103static int get_ac_property(struct power_supply *psy,
104 enum power_supply_property psp,
105 union power_supply_propval *val)
106{
107 struct acpi_ac *ac = to_acpi_ac(psy);
108 switch (psp) {
109 case POWER_SUPPLY_PROP_ONLINE:
110 val->intval = ac->state;
111 break;
112 default:
113 return -EINVAL;
114 }
115 return 0;
116}
117
118static enum power_supply_property ac_props[] = {
119 POWER_SUPPLY_PROP_ONLINE,
120};
97749cd9 121#endif
1da177e4
LT
122/* --------------------------------------------------------------------------
123 AC Adapter Management
124 -------------------------------------------------------------------------- */
125
4be44fcd 126static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4 127{
4be44fcd 128 acpi_status status = AE_OK;
1da177e4 129
1da177e4
LT
130
131 if (!ac)
d550d98d 132 return -EINVAL;
1da177e4 133
a6ba5ebe 134 status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
1da177e4 135 if (ACPI_FAILURE(status)) {
a6fc6720 136 ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
1da177e4 137 ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d 138 return -ENODEV;
1da177e4 139 }
4be44fcd 140
d550d98d 141 return 0;
1da177e4
LT
142}
143
fdcedbba 144#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4
LT
145/* --------------------------------------------------------------------------
146 FS Interface (/proc)
147 -------------------------------------------------------------------------- */
148
4be44fcd 149static struct proc_dir_entry *acpi_ac_dir;
1da177e4
LT
150
151static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
152{
50dd0969 153 struct acpi_ac *ac = seq->private;
1da177e4 154
1da177e4
LT
155
156 if (!ac)
d550d98d 157 return 0;
1da177e4
LT
158
159 if (acpi_ac_get_state(ac)) {
160 seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
d550d98d 161 return 0;
1da177e4
LT
162 }
163
164 seq_puts(seq, "state: ");
165 switch (ac->state) {
166 case ACPI_AC_STATUS_OFFLINE:
167 seq_puts(seq, "off-line\n");
168 break;
169 case ACPI_AC_STATUS_ONLINE:
170 seq_puts(seq, "on-line\n");
171 break;
172 default:
173 seq_puts(seq, "unknown\n");
174 break;
175 }
176
d550d98d 177 return 0;
1da177e4 178}
4be44fcd 179
1da177e4
LT
180static int acpi_ac_open_fs(struct inode *inode, struct file *file)
181{
182 return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
183}
184
4be44fcd 185static int acpi_ac_add_fs(struct acpi_device *device)
1da177e4 186{
4be44fcd 187 struct proc_dir_entry *entry = NULL;
1da177e4 188
1da177e4
LT
189
190 if (!acpi_device_dir(device)) {
191 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
4be44fcd 192 acpi_ac_dir);
1da177e4 193 if (!acpi_device_dir(device))
d550d98d 194 return -ENODEV;
1da177e4
LT
195 acpi_device_dir(device)->owner = THIS_MODULE;
196 }
197
198 /* 'state' [R] */
cf7acfab
DL
199 entry = proc_create_data(ACPI_AC_FILE_STATE,
200 S_IRUGO, acpi_device_dir(device),
201 &acpi_ac_fops, acpi_driver_data(device));
1da177e4 202 if (!entry)
d550d98d 203 return -ENODEV;
d550d98d 204 return 0;
1da177e4
LT
205}
206
4be44fcd 207static int acpi_ac_remove_fs(struct acpi_device *device)
1da177e4 208{
1da177e4
LT
209
210 if (acpi_device_dir(device)) {
4be44fcd 211 remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
1da177e4
LT
212
213 remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
214 acpi_device_dir(device) = NULL;
215 }
216
d550d98d 217 return 0;
1da177e4 218}
8a246ee4 219#endif
1da177e4 220
1da177e4
LT
221/* --------------------------------------------------------------------------
222 Driver Model
223 -------------------------------------------------------------------------- */
224
4be44fcd 225static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
1da177e4 226{
50dd0969 227 struct acpi_ac *ac = data;
4be44fcd 228 struct acpi_device *device = NULL;
1da177e4 229
1da177e4
LT
230
231 if (!ac)
d550d98d 232 return;
1da177e4 233
af96179a 234 device = ac->device;
1da177e4 235 switch (event) {
f163ff51
LB
236 default:
237 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
238 "Unsupported event [0x%x]\n", event));
1da177e4 239 case ACPI_AC_NOTIFY_STATUS:
03d78252
CL
240 case ACPI_NOTIFY_BUS_CHECK:
241 case ACPI_NOTIFY_DEVICE_CHECK:
1da177e4 242 acpi_ac_get_state(ac);
14e04fb3 243 acpi_bus_generate_proc_event(device, event, (u32) ac->state);
962ce8ca
ZR
244 acpi_bus_generate_netlink_event(device->pnp.device_class,
245 device->dev.bus_id, event,
246 (u32) ac->state);
97749cd9 247#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0 248 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
97749cd9 249#endif
1da177e4
LT
250 }
251
d550d98d 252 return;
1da177e4
LT
253}
254
4be44fcd 255static int acpi_ac_add(struct acpi_device *device)
1da177e4 256{
4be44fcd
LB
257 int result = 0;
258 acpi_status status = AE_OK;
259 struct acpi_ac *ac = NULL;
1da177e4 260
1da177e4
LT
261
262 if (!device)
d550d98d 263 return -EINVAL;
1da177e4 264
36bcbec7 265 ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4 266 if (!ac)
d550d98d 267 return -ENOMEM;
1da177e4 268
af96179a 269 ac->device = device;
1da177e4
LT
270 strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
271 strcpy(acpi_device_class(device), ACPI_AC_CLASS);
272 acpi_driver_data(device) = ac;
273
274 result = acpi_ac_get_state(ac);
275 if (result)
276 goto end;
277
fdcedbba 278#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 279 result = acpi_ac_add_fs(device);
8a246ee4 280#endif
1da177e4
LT
281 if (result)
282 goto end;
97749cd9 283#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0
AS
284 ac->charger.name = acpi_device_bid(device);
285 ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
286 ac->charger.properties = ac_props;
287 ac->charger.num_properties = ARRAY_SIZE(ac_props);
288 ac->charger.get_property = get_ac_property;
289 power_supply_register(&ac->device->dev, &ac->charger);
97749cd9 290#endif
a6ba5ebe 291 status = acpi_install_notify_handler(device->handle,
03d78252 292 ACPI_ALL_NOTIFY, acpi_ac_notify,
4be44fcd 293 ac);
1da177e4 294 if (ACPI_FAILURE(status)) {
1da177e4
LT
295 result = -ENODEV;
296 goto end;
297 }
298
4be44fcd
LB
299 printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
300 acpi_device_name(device), acpi_device_bid(device),
301 ac->state ? "on-line" : "off-line");
1da177e4 302
4be44fcd 303 end:
1da177e4 304 if (result) {
fdcedbba 305#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 306 acpi_ac_remove_fs(device);
8a246ee4 307#endif
1da177e4
LT
308 kfree(ac);
309 }
310
d550d98d 311 return result;
1da177e4
LT
312}
313
5bfeca31
AS
314static int acpi_ac_resume(struct acpi_device *device)
315{
316 struct acpi_ac *ac;
317 unsigned old_state;
318 if (!device || !acpi_driver_data(device))
319 return -EINVAL;
320 ac = acpi_driver_data(device);
321 old_state = ac->state;
322 if (acpi_ac_get_state(ac))
323 return 0;
97749cd9 324#ifdef CONFIG_ACPI_SYSFS_POWER
5bfeca31
AS
325 if (old_state != ac->state)
326 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
97749cd9 327#endif
5bfeca31
AS
328 return 0;
329}
330
4be44fcd 331static int acpi_ac_remove(struct acpi_device *device, int type)
1da177e4 332{
4be44fcd
LB
333 acpi_status status = AE_OK;
334 struct acpi_ac *ac = NULL;
1da177e4 335
1da177e4
LT
336
337 if (!device || !acpi_driver_data(device))
d550d98d 338 return -EINVAL;
1da177e4 339
50dd0969 340 ac = acpi_driver_data(device);
1da177e4 341
a6ba5ebe 342 status = acpi_remove_notify_handler(device->handle,
03d78252 343 ACPI_ALL_NOTIFY, acpi_ac_notify);
97749cd9 344#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0
AS
345 if (ac->charger.dev)
346 power_supply_unregister(&ac->charger);
97749cd9 347#endif
fdcedbba 348#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 349 acpi_ac_remove_fs(device);
8a246ee4 350#endif
1da177e4
LT
351
352 kfree(ac);
353
d550d98d 354 return 0;
1da177e4
LT
355}
356
4be44fcd 357static int __init acpi_ac_init(void)
1da177e4 358{
3f86b832 359 int result;
1da177e4 360
4d8316d5
PM
361 if (acpi_disabled)
362 return -ENODEV;
1da177e4 363
fdcedbba 364#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 365 acpi_ac_dir = acpi_lock_ac_dir();
1da177e4 366 if (!acpi_ac_dir)
d550d98d 367 return -ENODEV;
8a246ee4 368#endif
1da177e4
LT
369
370 result = acpi_bus_register_driver(&acpi_ac_driver);
371 if (result < 0) {
fdcedbba 372#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 373 acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4 374#endif
d550d98d 375 return -ENODEV;
1da177e4
LT
376 }
377
d550d98d 378 return 0;
1da177e4
LT
379}
380
4be44fcd 381static void __exit acpi_ac_exit(void)
1da177e4 382{
1da177e4
LT
383
384 acpi_bus_unregister_driver(&acpi_ac_driver);
385
fdcedbba 386#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 387 acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4 388#endif
1da177e4 389
d550d98d 390 return;
1da177e4
LT
391}
392
1da177e4
LT
393module_init(acpi_ac_init);
394module_exit(acpi_ac_exit);