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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> | |
5a0e3ad6 | 28 | #include <linux/slab.h> |
1da177e4 LT |
29 | #include <linux/init.h> |
30 | #include <linux/types.h> | |
fdcedbba | 31 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 LT |
32 | #include <linux/proc_fs.h> |
33 | #include <linux/seq_file.h> | |
8a246ee4 | 34 | #endif |
d5b4a3d0 | 35 | #include <linux/power_supply.h> |
1da177e4 LT |
36 | #include <acpi/acpi_bus.h> |
37 | #include <acpi/acpi_drivers.h> | |
38 | ||
a192a958 LB |
39 | #define PREFIX "ACPI: " |
40 | ||
1da177e4 | 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 | 50 | ACPI_MODULE_NAME("ac"); |
1da177e4 | 51 | |
f52fd66d | 52 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 53 | MODULE_DESCRIPTION("ACPI AC Adapter Driver"); |
1da177e4 LT |
54 | MODULE_LICENSE("GPL"); |
55 | ||
fdcedbba | 56 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 RT |
57 | extern struct proc_dir_entry *acpi_lock_ac_dir(void); |
58 | extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir); | |
8a246ee4 AB |
59 | static int acpi_ac_open_fs(struct inode *inode, struct file *file); |
60 | #endif | |
3f86b832 | 61 | |
4be44fcd LB |
62 | static int acpi_ac_add(struct acpi_device *device); |
63 | static int acpi_ac_remove(struct acpi_device *device, int type); | |
5bfeca31 | 64 | static int acpi_ac_resume(struct acpi_device *device); |
48fe1127 | 65 | static void acpi_ac_notify(struct acpi_device *device, u32 event); |
1da177e4 | 66 | |
b299c22c | 67 | static const struct acpi_device_id ac_device_ids[] = { |
1ba90e3a TR |
68 | {"ACPI0003", 0}, |
69 | {"", 0}, | |
70 | }; | |
71 | MODULE_DEVICE_TABLE(acpi, ac_device_ids); | |
72 | ||
1da177e4 | 73 | static struct acpi_driver acpi_ac_driver = { |
c2b6705b | 74 | .name = "ac", |
4be44fcd | 75 | .class = ACPI_AC_CLASS, |
1ba90e3a | 76 | .ids = ac_device_ids, |
48fe1127 | 77 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
4be44fcd LB |
78 | .ops = { |
79 | .add = acpi_ac_add, | |
80 | .remove = acpi_ac_remove, | |
5bfeca31 | 81 | .resume = acpi_ac_resume, |
48fe1127 | 82 | .notify = acpi_ac_notify, |
4be44fcd | 83 | }, |
1da177e4 LT |
84 | }; |
85 | ||
86 | struct acpi_ac { | |
d5b4a3d0 | 87 | struct power_supply charger; |
af96179a | 88 | struct acpi_device * device; |
27663c58 | 89 | unsigned long long state; |
1da177e4 LT |
90 | }; |
91 | ||
d5b4a3d0 AS |
92 | #define to_acpi_ac(x) container_of(x, struct acpi_ac, charger); |
93 | ||
fdcedbba | 94 | #ifdef CONFIG_ACPI_PROCFS_POWER |
d7508032 | 95 | static const struct file_operations acpi_ac_fops = { |
cf7acfab | 96 | .owner = THIS_MODULE, |
4be44fcd LB |
97 | .open = acpi_ac_open_fs, |
98 | .read = seq_read, | |
99 | .llseek = seq_lseek, | |
100 | .release = single_release, | |
1da177e4 | 101 | }; |
8a246ee4 | 102 | #endif |
d5b4a3d0 AS |
103 | static 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 | ||
118 | static enum power_supply_property ac_props[] = { | |
119 | POWER_SUPPLY_PROP_ONLINE, | |
120 | }; | |
1da177e4 LT |
121 | /* -------------------------------------------------------------------------- |
122 | AC Adapter Management | |
123 | -------------------------------------------------------------------------- */ | |
124 | ||
4be44fcd | 125 | static int acpi_ac_get_state(struct acpi_ac *ac) |
1da177e4 | 126 | { |
4be44fcd | 127 | acpi_status status = AE_OK; |
1da177e4 | 128 | |
1da177e4 LT |
129 | |
130 | if (!ac) | |
d550d98d | 131 | return -EINVAL; |
1da177e4 | 132 | |
a6ba5ebe | 133 | status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state); |
1da177e4 | 134 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 135 | ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state")); |
1da177e4 | 136 | ac->state = ACPI_AC_STATUS_UNKNOWN; |
d550d98d | 137 | return -ENODEV; |
1da177e4 | 138 | } |
4be44fcd | 139 | |
d550d98d | 140 | return 0; |
1da177e4 LT |
141 | } |
142 | ||
fdcedbba | 143 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 LT |
144 | /* -------------------------------------------------------------------------- |
145 | FS Interface (/proc) | |
146 | -------------------------------------------------------------------------- */ | |
147 | ||
4be44fcd | 148 | static struct proc_dir_entry *acpi_ac_dir; |
1da177e4 LT |
149 | |
150 | static int acpi_ac_seq_show(struct seq_file *seq, void *offset) | |
151 | { | |
50dd0969 | 152 | struct acpi_ac *ac = seq->private; |
1da177e4 | 153 | |
1da177e4 LT |
154 | |
155 | if (!ac) | |
d550d98d | 156 | return 0; |
1da177e4 LT |
157 | |
158 | if (acpi_ac_get_state(ac)) { | |
159 | seq_puts(seq, "ERROR: Unable to read AC Adapter state\n"); | |
d550d98d | 160 | return 0; |
1da177e4 LT |
161 | } |
162 | ||
163 | seq_puts(seq, "state: "); | |
164 | switch (ac->state) { | |
165 | case ACPI_AC_STATUS_OFFLINE: | |
166 | seq_puts(seq, "off-line\n"); | |
167 | break; | |
168 | case ACPI_AC_STATUS_ONLINE: | |
169 | seq_puts(seq, "on-line\n"); | |
170 | break; | |
171 | default: | |
172 | seq_puts(seq, "unknown\n"); | |
173 | break; | |
174 | } | |
175 | ||
d550d98d | 176 | return 0; |
1da177e4 | 177 | } |
4be44fcd | 178 | |
1da177e4 LT |
179 | static int acpi_ac_open_fs(struct inode *inode, struct file *file) |
180 | { | |
181 | return single_open(file, acpi_ac_seq_show, PDE(inode)->data); | |
182 | } | |
183 | ||
4be44fcd | 184 | static int acpi_ac_add_fs(struct acpi_device *device) |
1da177e4 | 185 | { |
4be44fcd | 186 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 187 | |
1da177e4 LT |
188 | |
189 | if (!acpi_device_dir(device)) { | |
190 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 191 | acpi_ac_dir); |
1da177e4 | 192 | if (!acpi_device_dir(device)) |
d550d98d | 193 | return -ENODEV; |
1da177e4 LT |
194 | } |
195 | ||
196 | /* 'state' [R] */ | |
cf7acfab DL |
197 | entry = proc_create_data(ACPI_AC_FILE_STATE, |
198 | S_IRUGO, acpi_device_dir(device), | |
199 | &acpi_ac_fops, acpi_driver_data(device)); | |
1da177e4 | 200 | if (!entry) |
d550d98d | 201 | return -ENODEV; |
d550d98d | 202 | return 0; |
1da177e4 LT |
203 | } |
204 | ||
4be44fcd | 205 | static int acpi_ac_remove_fs(struct acpi_device *device) |
1da177e4 | 206 | { |
1da177e4 LT |
207 | |
208 | if (acpi_device_dir(device)) { | |
4be44fcd | 209 | remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device)); |
1da177e4 LT |
210 | |
211 | remove_proc_entry(acpi_device_bid(device), acpi_ac_dir); | |
212 | acpi_device_dir(device) = NULL; | |
213 | } | |
214 | ||
d550d98d | 215 | return 0; |
1da177e4 | 216 | } |
8a246ee4 | 217 | #endif |
1da177e4 | 218 | |
1da177e4 LT |
219 | /* -------------------------------------------------------------------------- |
220 | Driver Model | |
221 | -------------------------------------------------------------------------- */ | |
222 | ||
48fe1127 | 223 | static void acpi_ac_notify(struct acpi_device *device, u32 event) |
1da177e4 | 224 | { |
48fe1127 | 225 | struct acpi_ac *ac = acpi_driver_data(device); |
1da177e4 | 226 | |
1da177e4 LT |
227 | |
228 | if (!ac) | |
d550d98d | 229 | return; |
1da177e4 | 230 | |
1da177e4 | 231 | switch (event) { |
f163ff51 LB |
232 | default: |
233 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
234 | "Unsupported event [0x%x]\n", event)); | |
1da177e4 | 235 | case ACPI_AC_NOTIFY_STATUS: |
03d78252 CL |
236 | case ACPI_NOTIFY_BUS_CHECK: |
237 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1da177e4 | 238 | acpi_ac_get_state(ac); |
14e04fb3 | 239 | acpi_bus_generate_proc_event(device, event, (u32) ac->state); |
962ce8ca | 240 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 241 | dev_name(&device->dev), event, |
962ce8ca | 242 | (u32) ac->state); |
68b92b56 | 243 | acpi_notifier_call_chain(device, event, (u32) ac->state); |
d5b4a3d0 | 244 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); |
1da177e4 LT |
245 | } |
246 | ||
d550d98d | 247 | return; |
1da177e4 LT |
248 | } |
249 | ||
4be44fcd | 250 | static int acpi_ac_add(struct acpi_device *device) |
1da177e4 | 251 | { |
4be44fcd | 252 | int result = 0; |
4be44fcd | 253 | struct acpi_ac *ac = NULL; |
1da177e4 | 254 | |
1da177e4 LT |
255 | |
256 | if (!device) | |
d550d98d | 257 | return -EINVAL; |
1da177e4 | 258 | |
36bcbec7 | 259 | ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL); |
1da177e4 | 260 | if (!ac) |
d550d98d | 261 | return -ENOMEM; |
1da177e4 | 262 | |
af96179a | 263 | ac->device = device; |
1da177e4 LT |
264 | strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME); |
265 | strcpy(acpi_device_class(device), ACPI_AC_CLASS); | |
db89b4f0 | 266 | device->driver_data = ac; |
1da177e4 LT |
267 | |
268 | result = acpi_ac_get_state(ac); | |
269 | if (result) | |
270 | goto end; | |
271 | ||
fdcedbba | 272 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 273 | result = acpi_ac_add_fs(device); |
8a246ee4 | 274 | #endif |
1da177e4 LT |
275 | if (result) |
276 | goto end; | |
d5b4a3d0 AS |
277 | ac->charger.name = acpi_device_bid(device); |
278 | ac->charger.type = POWER_SUPPLY_TYPE_MAINS; | |
279 | ac->charger.properties = ac_props; | |
280 | ac->charger.num_properties = ARRAY_SIZE(ac_props); | |
281 | ac->charger.get_property = get_ac_property; | |
282 | power_supply_register(&ac->device->dev, &ac->charger); | |
1da177e4 | 283 | |
4be44fcd LB |
284 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", |
285 | acpi_device_name(device), acpi_device_bid(device), | |
286 | ac->state ? "on-line" : "off-line"); | |
1da177e4 | 287 | |
4be44fcd | 288 | end: |
1da177e4 | 289 | if (result) { |
fdcedbba | 290 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 291 | acpi_ac_remove_fs(device); |
8a246ee4 | 292 | #endif |
1da177e4 LT |
293 | kfree(ac); |
294 | } | |
295 | ||
d550d98d | 296 | return result; |
1da177e4 LT |
297 | } |
298 | ||
5bfeca31 AS |
299 | static int acpi_ac_resume(struct acpi_device *device) |
300 | { | |
301 | struct acpi_ac *ac; | |
302 | unsigned old_state; | |
303 | if (!device || !acpi_driver_data(device)) | |
304 | return -EINVAL; | |
305 | ac = acpi_driver_data(device); | |
306 | old_state = ac->state; | |
307 | if (acpi_ac_get_state(ac)) | |
308 | return 0; | |
309 | if (old_state != ac->state) | |
310 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); | |
311 | return 0; | |
312 | } | |
313 | ||
4be44fcd | 314 | static int acpi_ac_remove(struct acpi_device *device, int type) |
1da177e4 | 315 | { |
4be44fcd | 316 | struct acpi_ac *ac = NULL; |
1da177e4 | 317 | |
1da177e4 LT |
318 | |
319 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 320 | return -EINVAL; |
1da177e4 | 321 | |
50dd0969 | 322 | ac = acpi_driver_data(device); |
1da177e4 | 323 | |
d5b4a3d0 AS |
324 | if (ac->charger.dev) |
325 | power_supply_unregister(&ac->charger); | |
fdcedbba | 326 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 327 | acpi_ac_remove_fs(device); |
8a246ee4 | 328 | #endif |
1da177e4 LT |
329 | |
330 | kfree(ac); | |
331 | ||
d550d98d | 332 | return 0; |
1da177e4 LT |
333 | } |
334 | ||
4be44fcd | 335 | static int __init acpi_ac_init(void) |
1da177e4 | 336 | { |
3f86b832 | 337 | int result; |
1da177e4 | 338 | |
4d8316d5 PM |
339 | if (acpi_disabled) |
340 | return -ENODEV; | |
1da177e4 | 341 | |
fdcedbba | 342 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 343 | acpi_ac_dir = acpi_lock_ac_dir(); |
1da177e4 | 344 | if (!acpi_ac_dir) |
d550d98d | 345 | return -ENODEV; |
8a246ee4 | 346 | #endif |
1da177e4 LT |
347 | |
348 | result = acpi_bus_register_driver(&acpi_ac_driver); | |
349 | if (result < 0) { | |
fdcedbba | 350 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 351 | acpi_unlock_ac_dir(acpi_ac_dir); |
8a246ee4 | 352 | #endif |
d550d98d | 353 | return -ENODEV; |
1da177e4 LT |
354 | } |
355 | ||
d550d98d | 356 | return 0; |
1da177e4 LT |
357 | } |
358 | ||
4be44fcd | 359 | static void __exit acpi_ac_exit(void) |
1da177e4 | 360 | { |
1da177e4 LT |
361 | |
362 | acpi_bus_unregister_driver(&acpi_ac_driver); | |
363 | ||
fdcedbba | 364 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 365 | acpi_unlock_ac_dir(acpi_ac_dir); |
8a246ee4 | 366 | #endif |
1da177e4 | 367 | |
d550d98d | 368 | return; |
1da177e4 LT |
369 | } |
370 | ||
1da177e4 LT |
371 | module_init(acpi_ac_init); |
372 | module_exit(acpi_ac_exit); |