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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> | |
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 | 40 | #define ACPI_AC_CLASS "ac_adapter" |
1da177e4 LT |
41 | #define ACPI_AC_DEVICE_NAME "AC Adapter" |
42 | #define ACPI_AC_FILE_STATE "state" | |
43 | #define ACPI_AC_NOTIFY_STATUS 0x80 | |
44 | #define ACPI_AC_STATUS_OFFLINE 0x00 | |
45 | #define ACPI_AC_STATUS_ONLINE 0x01 | |
46 | #define ACPI_AC_STATUS_UNKNOWN 0xFF | |
47 | ||
48 | #define _COMPONENT ACPI_AC_COMPONENT | |
f52fd66d | 49 | ACPI_MODULE_NAME("ac"); |
1da177e4 | 50 | |
f52fd66d | 51 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 52 | MODULE_DESCRIPTION("ACPI AC Adapter Driver"); |
1da177e4 LT |
53 | MODULE_LICENSE("GPL"); |
54 | ||
fdcedbba | 55 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 RT |
56 | extern struct proc_dir_entry *acpi_lock_ac_dir(void); |
57 | extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir); | |
8a246ee4 AB |
58 | static int acpi_ac_open_fs(struct inode *inode, struct file *file); |
59 | #endif | |
3f86b832 | 60 | |
4be44fcd LB |
61 | static int acpi_ac_add(struct acpi_device *device); |
62 | static int acpi_ac_remove(struct acpi_device *device, int type); | |
5bfeca31 | 63 | static int acpi_ac_resume(struct acpi_device *device); |
1da177e4 | 64 | |
b299c22c | 65 | static const struct acpi_device_id ac_device_ids[] = { |
1ba90e3a TR |
66 | {"ACPI0003", 0}, |
67 | {"", 0}, | |
68 | }; | |
69 | MODULE_DEVICE_TABLE(acpi, ac_device_ids); | |
70 | ||
1da177e4 | 71 | static struct acpi_driver acpi_ac_driver = { |
c2b6705b | 72 | .name = "ac", |
4be44fcd | 73 | .class = ACPI_AC_CLASS, |
1ba90e3a | 74 | .ids = ac_device_ids, |
4be44fcd LB |
75 | .ops = { |
76 | .add = acpi_ac_add, | |
77 | .remove = acpi_ac_remove, | |
5bfeca31 | 78 | .resume = acpi_ac_resume, |
4be44fcd | 79 | }, |
1da177e4 LT |
80 | }; |
81 | ||
82 | struct acpi_ac { | |
97749cd9 | 83 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d5b4a3d0 | 84 | struct power_supply charger; |
97749cd9 | 85 | #endif |
af96179a | 86 | struct acpi_device * device; |
27663c58 | 87 | unsigned long long state; |
1da177e4 LT |
88 | }; |
89 | ||
d5b4a3d0 AS |
90 | #define to_acpi_ac(x) container_of(x, struct acpi_ac, charger); |
91 | ||
fdcedbba | 92 | #ifdef CONFIG_ACPI_PROCFS_POWER |
d7508032 | 93 | static const struct file_operations acpi_ac_fops = { |
cf7acfab | 94 | .owner = THIS_MODULE, |
4be44fcd LB |
95 | .open = acpi_ac_open_fs, |
96 | .read = seq_read, | |
97 | .llseek = seq_lseek, | |
98 | .release = single_release, | |
1da177e4 | 99 | }; |
8a246ee4 | 100 | #endif |
97749cd9 | 101 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d5b4a3d0 AS |
102 | static int get_ac_property(struct power_supply *psy, |
103 | enum power_supply_property psp, | |
104 | union power_supply_propval *val) | |
105 | { | |
106 | struct acpi_ac *ac = to_acpi_ac(psy); | |
107 | switch (psp) { | |
108 | case POWER_SUPPLY_PROP_ONLINE: | |
109 | val->intval = ac->state; | |
110 | break; | |
111 | default: | |
112 | return -EINVAL; | |
113 | } | |
114 | return 0; | |
115 | } | |
116 | ||
117 | static enum power_supply_property ac_props[] = { | |
118 | POWER_SUPPLY_PROP_ONLINE, | |
119 | }; | |
97749cd9 | 120 | #endif |
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 | acpi_device_dir(device)->owner = THIS_MODULE; |
195 | } | |
196 | ||
197 | /* 'state' [R] */ | |
cf7acfab DL |
198 | entry = proc_create_data(ACPI_AC_FILE_STATE, |
199 | S_IRUGO, acpi_device_dir(device), | |
200 | &acpi_ac_fops, acpi_driver_data(device)); | |
1da177e4 | 201 | if (!entry) |
d550d98d | 202 | return -ENODEV; |
d550d98d | 203 | return 0; |
1da177e4 LT |
204 | } |
205 | ||
4be44fcd | 206 | static int acpi_ac_remove_fs(struct acpi_device *device) |
1da177e4 | 207 | { |
1da177e4 LT |
208 | |
209 | if (acpi_device_dir(device)) { | |
4be44fcd | 210 | remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device)); |
1da177e4 LT |
211 | |
212 | remove_proc_entry(acpi_device_bid(device), acpi_ac_dir); | |
213 | acpi_device_dir(device) = NULL; | |
214 | } | |
215 | ||
d550d98d | 216 | return 0; |
1da177e4 | 217 | } |
8a246ee4 | 218 | #endif |
1da177e4 | 219 | |
1da177e4 LT |
220 | /* -------------------------------------------------------------------------- |
221 | Driver Model | |
222 | -------------------------------------------------------------------------- */ | |
223 | ||
4be44fcd | 224 | static void acpi_ac_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 225 | { |
50dd0969 | 226 | struct acpi_ac *ac = data; |
4be44fcd | 227 | struct acpi_device *device = NULL; |
1da177e4 | 228 | |
1da177e4 LT |
229 | |
230 | if (!ac) | |
d550d98d | 231 | return; |
1da177e4 | 232 | |
af96179a | 233 | device = ac->device; |
1da177e4 | 234 | switch (event) { |
f163ff51 LB |
235 | default: |
236 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
237 | "Unsupported event [0x%x]\n", event)); | |
1da177e4 | 238 | case ACPI_AC_NOTIFY_STATUS: |
03d78252 CL |
239 | case ACPI_NOTIFY_BUS_CHECK: |
240 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1da177e4 | 241 | acpi_ac_get_state(ac); |
14e04fb3 | 242 | acpi_bus_generate_proc_event(device, event, (u32) ac->state); |
962ce8ca | 243 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 244 | dev_name(&device->dev), event, |
962ce8ca | 245 | (u32) ac->state); |
97749cd9 | 246 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d5b4a3d0 | 247 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); |
97749cd9 | 248 | #endif |
1da177e4 LT |
249 | } |
250 | ||
d550d98d | 251 | return; |
1da177e4 LT |
252 | } |
253 | ||
4be44fcd | 254 | static int acpi_ac_add(struct acpi_device *device) |
1da177e4 | 255 | { |
4be44fcd LB |
256 | int result = 0; |
257 | acpi_status status = AE_OK; | |
258 | struct acpi_ac *ac = NULL; | |
1da177e4 | 259 | |
1da177e4 LT |
260 | |
261 | if (!device) | |
d550d98d | 262 | return -EINVAL; |
1da177e4 | 263 | |
36bcbec7 | 264 | ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL); |
1da177e4 | 265 | if (!ac) |
d550d98d | 266 | return -ENOMEM; |
1da177e4 | 267 | |
af96179a | 268 | ac->device = device; |
1da177e4 LT |
269 | strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME); |
270 | strcpy(acpi_device_class(device), ACPI_AC_CLASS); | |
db89b4f0 | 271 | device->driver_data = ac; |
1da177e4 LT |
272 | |
273 | result = acpi_ac_get_state(ac); | |
274 | if (result) | |
275 | goto end; | |
276 | ||
fdcedbba | 277 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 278 | result = acpi_ac_add_fs(device); |
8a246ee4 | 279 | #endif |
1da177e4 LT |
280 | if (result) |
281 | goto end; | |
97749cd9 | 282 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d5b4a3d0 AS |
283 | ac->charger.name = acpi_device_bid(device); |
284 | ac->charger.type = POWER_SUPPLY_TYPE_MAINS; | |
285 | ac->charger.properties = ac_props; | |
286 | ac->charger.num_properties = ARRAY_SIZE(ac_props); | |
287 | ac->charger.get_property = get_ac_property; | |
288 | power_supply_register(&ac->device->dev, &ac->charger); | |
97749cd9 | 289 | #endif |
a6ba5ebe | 290 | status = acpi_install_notify_handler(device->handle, |
03d78252 | 291 | ACPI_ALL_NOTIFY, acpi_ac_notify, |
4be44fcd | 292 | ac); |
1da177e4 | 293 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
294 | result = -ENODEV; |
295 | goto end; | |
296 | } | |
297 | ||
4be44fcd LB |
298 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", |
299 | acpi_device_name(device), acpi_device_bid(device), | |
300 | ac->state ? "on-line" : "off-line"); | |
1da177e4 | 301 | |
4be44fcd | 302 | end: |
1da177e4 | 303 | if (result) { |
fdcedbba | 304 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 305 | acpi_ac_remove_fs(device); |
8a246ee4 | 306 | #endif |
1da177e4 LT |
307 | kfree(ac); |
308 | } | |
309 | ||
d550d98d | 310 | return result; |
1da177e4 LT |
311 | } |
312 | ||
5bfeca31 AS |
313 | static int acpi_ac_resume(struct acpi_device *device) |
314 | { | |
315 | struct acpi_ac *ac; | |
316 | unsigned old_state; | |
317 | if (!device || !acpi_driver_data(device)) | |
318 | return -EINVAL; | |
319 | ac = acpi_driver_data(device); | |
320 | old_state = ac->state; | |
321 | if (acpi_ac_get_state(ac)) | |
322 | return 0; | |
97749cd9 | 323 | #ifdef CONFIG_ACPI_SYSFS_POWER |
5bfeca31 AS |
324 | if (old_state != ac->state) |
325 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); | |
97749cd9 | 326 | #endif |
5bfeca31 AS |
327 | return 0; |
328 | } | |
329 | ||
4be44fcd | 330 | static int acpi_ac_remove(struct acpi_device *device, int type) |
1da177e4 | 331 | { |
4be44fcd LB |
332 | acpi_status status = AE_OK; |
333 | struct acpi_ac *ac = NULL; | |
1da177e4 | 334 | |
1da177e4 LT |
335 | |
336 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 337 | return -EINVAL; |
1da177e4 | 338 | |
50dd0969 | 339 | ac = acpi_driver_data(device); |
1da177e4 | 340 | |
a6ba5ebe | 341 | status = acpi_remove_notify_handler(device->handle, |
03d78252 | 342 | ACPI_ALL_NOTIFY, acpi_ac_notify); |
97749cd9 | 343 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d5b4a3d0 AS |
344 | if (ac->charger.dev) |
345 | power_supply_unregister(&ac->charger); | |
97749cd9 | 346 | #endif |
fdcedbba | 347 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 348 | acpi_ac_remove_fs(device); |
8a246ee4 | 349 | #endif |
1da177e4 LT |
350 | |
351 | kfree(ac); | |
352 | ||
d550d98d | 353 | return 0; |
1da177e4 LT |
354 | } |
355 | ||
4be44fcd | 356 | static int __init acpi_ac_init(void) |
1da177e4 | 357 | { |
3f86b832 | 358 | int result; |
1da177e4 | 359 | |
4d8316d5 PM |
360 | if (acpi_disabled) |
361 | return -ENODEV; | |
1da177e4 | 362 | |
fdcedbba | 363 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 364 | acpi_ac_dir = acpi_lock_ac_dir(); |
1da177e4 | 365 | if (!acpi_ac_dir) |
d550d98d | 366 | return -ENODEV; |
8a246ee4 | 367 | #endif |
1da177e4 LT |
368 | |
369 | result = acpi_bus_register_driver(&acpi_ac_driver); | |
370 | if (result < 0) { | |
fdcedbba | 371 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 372 | acpi_unlock_ac_dir(acpi_ac_dir); |
8a246ee4 | 373 | #endif |
d550d98d | 374 | return -ENODEV; |
1da177e4 LT |
375 | } |
376 | ||
d550d98d | 377 | return 0; |
1da177e4 LT |
378 | } |
379 | ||
4be44fcd | 380 | static void __exit acpi_ac_exit(void) |
1da177e4 | 381 | { |
1da177e4 LT |
382 | |
383 | acpi_bus_unregister_driver(&acpi_ac_driver); | |
384 | ||
fdcedbba | 385 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 386 | acpi_unlock_ac_dir(acpi_ac_dir); |
8a246ee4 | 387 | #endif |
1da177e4 | 388 | |
d550d98d | 389 | return; |
1da177e4 LT |
390 | } |
391 | ||
1da177e4 LT |
392 | module_init(acpi_ac_init); |
393 | module_exit(acpi_ac_exit); |