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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 |
97749cd9 | 35 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d5b4a3d0 | 36 | #include <linux/power_supply.h> |
97749cd9 | 37 | #endif |
1da177e4 LT |
38 | #include <acpi/acpi_bus.h> |
39 | #include <acpi/acpi_drivers.h> | |
40 | ||
a192a958 LB |
41 | #define PREFIX "ACPI: " |
42 | ||
1da177e4 | 43 | #define ACPI_AC_CLASS "ac_adapter" |
1da177e4 LT |
44 | #define ACPI_AC_DEVICE_NAME "AC Adapter" |
45 | #define ACPI_AC_FILE_STATE "state" | |
46 | #define ACPI_AC_NOTIFY_STATUS 0x80 | |
47 | #define ACPI_AC_STATUS_OFFLINE 0x00 | |
48 | #define ACPI_AC_STATUS_ONLINE 0x01 | |
49 | #define ACPI_AC_STATUS_UNKNOWN 0xFF | |
50 | ||
51 | #define _COMPONENT ACPI_AC_COMPONENT | |
f52fd66d | 52 | ACPI_MODULE_NAME("ac"); |
1da177e4 | 53 | |
f52fd66d | 54 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 55 | MODULE_DESCRIPTION("ACPI AC Adapter Driver"); |
1da177e4 LT |
56 | MODULE_LICENSE("GPL"); |
57 | ||
fdcedbba | 58 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 RT |
59 | extern struct proc_dir_entry *acpi_lock_ac_dir(void); |
60 | extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir); | |
8a246ee4 AB |
61 | static int acpi_ac_open_fs(struct inode *inode, struct file *file); |
62 | #endif | |
3f86b832 | 63 | |
4be44fcd LB |
64 | static int acpi_ac_add(struct acpi_device *device); |
65 | static int acpi_ac_remove(struct acpi_device *device, int type); | |
5bfeca31 | 66 | static int acpi_ac_resume(struct acpi_device *device); |
48fe1127 | 67 | static void acpi_ac_notify(struct acpi_device *device, u32 event); |
1da177e4 | 68 | |
b299c22c | 69 | static const struct acpi_device_id ac_device_ids[] = { |
1ba90e3a TR |
70 | {"ACPI0003", 0}, |
71 | {"", 0}, | |
72 | }; | |
73 | MODULE_DEVICE_TABLE(acpi, ac_device_ids); | |
74 | ||
1da177e4 | 75 | static struct acpi_driver acpi_ac_driver = { |
c2b6705b | 76 | .name = "ac", |
4be44fcd | 77 | .class = ACPI_AC_CLASS, |
1ba90e3a | 78 | .ids = ac_device_ids, |
48fe1127 | 79 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
4be44fcd LB |
80 | .ops = { |
81 | .add = acpi_ac_add, | |
82 | .remove = acpi_ac_remove, | |
5bfeca31 | 83 | .resume = acpi_ac_resume, |
48fe1127 | 84 | .notify = acpi_ac_notify, |
4be44fcd | 85 | }, |
1da177e4 LT |
86 | }; |
87 | ||
88 | struct acpi_ac { | |
97749cd9 | 89 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d5b4a3d0 | 90 | struct power_supply charger; |
97749cd9 | 91 | #endif |
af96179a | 92 | struct acpi_device * device; |
27663c58 | 93 | unsigned long long state; |
1da177e4 LT |
94 | }; |
95 | ||
d5b4a3d0 AS |
96 | #define to_acpi_ac(x) container_of(x, struct acpi_ac, charger); |
97 | ||
fdcedbba | 98 | #ifdef CONFIG_ACPI_PROCFS_POWER |
d7508032 | 99 | static const struct file_operations acpi_ac_fops = { |
cf7acfab | 100 | .owner = THIS_MODULE, |
4be44fcd LB |
101 | .open = acpi_ac_open_fs, |
102 | .read = seq_read, | |
103 | .llseek = seq_lseek, | |
104 | .release = single_release, | |
1da177e4 | 105 | }; |
8a246ee4 | 106 | #endif |
97749cd9 | 107 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d5b4a3d0 AS |
108 | static int get_ac_property(struct power_supply *psy, |
109 | enum power_supply_property psp, | |
110 | union power_supply_propval *val) | |
111 | { | |
112 | struct acpi_ac *ac = to_acpi_ac(psy); | |
113 | switch (psp) { | |
114 | case POWER_SUPPLY_PROP_ONLINE: | |
115 | val->intval = ac->state; | |
116 | break; | |
117 | default: | |
118 | return -EINVAL; | |
119 | } | |
120 | return 0; | |
121 | } | |
122 | ||
123 | static enum power_supply_property ac_props[] = { | |
124 | POWER_SUPPLY_PROP_ONLINE, | |
125 | }; | |
97749cd9 | 126 | #endif |
1da177e4 LT |
127 | /* -------------------------------------------------------------------------- |
128 | AC Adapter Management | |
129 | -------------------------------------------------------------------------- */ | |
130 | ||
4be44fcd | 131 | static int acpi_ac_get_state(struct acpi_ac *ac) |
1da177e4 | 132 | { |
4be44fcd | 133 | acpi_status status = AE_OK; |
1da177e4 | 134 | |
1da177e4 LT |
135 | |
136 | if (!ac) | |
d550d98d | 137 | return -EINVAL; |
1da177e4 | 138 | |
a6ba5ebe | 139 | status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state); |
1da177e4 | 140 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 141 | ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state")); |
1da177e4 | 142 | ac->state = ACPI_AC_STATUS_UNKNOWN; |
d550d98d | 143 | return -ENODEV; |
1da177e4 | 144 | } |
4be44fcd | 145 | |
d550d98d | 146 | return 0; |
1da177e4 LT |
147 | } |
148 | ||
fdcedbba | 149 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 LT |
150 | /* -------------------------------------------------------------------------- |
151 | FS Interface (/proc) | |
152 | -------------------------------------------------------------------------- */ | |
153 | ||
4be44fcd | 154 | static struct proc_dir_entry *acpi_ac_dir; |
1da177e4 LT |
155 | |
156 | static int acpi_ac_seq_show(struct seq_file *seq, void *offset) | |
157 | { | |
50dd0969 | 158 | struct acpi_ac *ac = seq->private; |
1da177e4 | 159 | |
1da177e4 LT |
160 | |
161 | if (!ac) | |
d550d98d | 162 | return 0; |
1da177e4 LT |
163 | |
164 | if (acpi_ac_get_state(ac)) { | |
165 | seq_puts(seq, "ERROR: Unable to read AC Adapter state\n"); | |
d550d98d | 166 | return 0; |
1da177e4 LT |
167 | } |
168 | ||
169 | seq_puts(seq, "state: "); | |
170 | switch (ac->state) { | |
171 | case ACPI_AC_STATUS_OFFLINE: | |
172 | seq_puts(seq, "off-line\n"); | |
173 | break; | |
174 | case ACPI_AC_STATUS_ONLINE: | |
175 | seq_puts(seq, "on-line\n"); | |
176 | break; | |
177 | default: | |
178 | seq_puts(seq, "unknown\n"); | |
179 | break; | |
180 | } | |
181 | ||
d550d98d | 182 | return 0; |
1da177e4 | 183 | } |
4be44fcd | 184 | |
1da177e4 LT |
185 | static int acpi_ac_open_fs(struct inode *inode, struct file *file) |
186 | { | |
187 | return single_open(file, acpi_ac_seq_show, PDE(inode)->data); | |
188 | } | |
189 | ||
4be44fcd | 190 | static int acpi_ac_add_fs(struct acpi_device *device) |
1da177e4 | 191 | { |
4be44fcd | 192 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 193 | |
1da177e4 LT |
194 | |
195 | if (!acpi_device_dir(device)) { | |
196 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 197 | acpi_ac_dir); |
1da177e4 | 198 | if (!acpi_device_dir(device)) |
d550d98d | 199 | return -ENODEV; |
1da177e4 LT |
200 | } |
201 | ||
202 | /* 'state' [R] */ | |
cf7acfab DL |
203 | entry = proc_create_data(ACPI_AC_FILE_STATE, |
204 | S_IRUGO, acpi_device_dir(device), | |
205 | &acpi_ac_fops, acpi_driver_data(device)); | |
1da177e4 | 206 | if (!entry) |
d550d98d | 207 | return -ENODEV; |
d550d98d | 208 | return 0; |
1da177e4 LT |
209 | } |
210 | ||
4be44fcd | 211 | static int acpi_ac_remove_fs(struct acpi_device *device) |
1da177e4 | 212 | { |
1da177e4 LT |
213 | |
214 | if (acpi_device_dir(device)) { | |
4be44fcd | 215 | remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device)); |
1da177e4 LT |
216 | |
217 | remove_proc_entry(acpi_device_bid(device), acpi_ac_dir); | |
218 | acpi_device_dir(device) = NULL; | |
219 | } | |
220 | ||
d550d98d | 221 | return 0; |
1da177e4 | 222 | } |
8a246ee4 | 223 | #endif |
1da177e4 | 224 | |
1da177e4 LT |
225 | /* -------------------------------------------------------------------------- |
226 | Driver Model | |
227 | -------------------------------------------------------------------------- */ | |
228 | ||
48fe1127 | 229 | static void acpi_ac_notify(struct acpi_device *device, u32 event) |
1da177e4 | 230 | { |
48fe1127 | 231 | struct acpi_ac *ac = acpi_driver_data(device); |
1da177e4 | 232 | |
1da177e4 LT |
233 | |
234 | if (!ac) | |
d550d98d | 235 | return; |
1da177e4 | 236 | |
1da177e4 | 237 | switch (event) { |
f163ff51 LB |
238 | default: |
239 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
240 | "Unsupported event [0x%x]\n", event)); | |
1da177e4 | 241 | case ACPI_AC_NOTIFY_STATUS: |
03d78252 CL |
242 | case ACPI_NOTIFY_BUS_CHECK: |
243 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1da177e4 | 244 | acpi_ac_get_state(ac); |
14e04fb3 | 245 | acpi_bus_generate_proc_event(device, event, (u32) ac->state); |
962ce8ca | 246 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 247 | dev_name(&device->dev), event, |
962ce8ca | 248 | (u32) ac->state); |
68b92b56 | 249 | acpi_notifier_call_chain(device, event, (u32) ac->state); |
97749cd9 | 250 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d5b4a3d0 | 251 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); |
97749cd9 | 252 | #endif |
1da177e4 LT |
253 | } |
254 | ||
d550d98d | 255 | return; |
1da177e4 LT |
256 | } |
257 | ||
4be44fcd | 258 | static int acpi_ac_add(struct acpi_device *device) |
1da177e4 | 259 | { |
4be44fcd | 260 | int result = 0; |
4be44fcd | 261 | struct acpi_ac *ac = NULL; |
1da177e4 | 262 | |
1da177e4 LT |
263 | |
264 | if (!device) | |
d550d98d | 265 | return -EINVAL; |
1da177e4 | 266 | |
36bcbec7 | 267 | ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL); |
1da177e4 | 268 | if (!ac) |
d550d98d | 269 | return -ENOMEM; |
1da177e4 | 270 | |
af96179a | 271 | ac->device = device; |
1da177e4 LT |
272 | strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME); |
273 | strcpy(acpi_device_class(device), ACPI_AC_CLASS); | |
db89b4f0 | 274 | device->driver_data = ac; |
1da177e4 LT |
275 | |
276 | result = acpi_ac_get_state(ac); | |
277 | if (result) | |
278 | goto end; | |
279 | ||
fdcedbba | 280 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 281 | result = acpi_ac_add_fs(device); |
8a246ee4 | 282 | #endif |
1da177e4 LT |
283 | if (result) |
284 | goto end; | |
97749cd9 | 285 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d5b4a3d0 AS |
286 | ac->charger.name = acpi_device_bid(device); |
287 | ac->charger.type = POWER_SUPPLY_TYPE_MAINS; | |
288 | ac->charger.properties = ac_props; | |
289 | ac->charger.num_properties = ARRAY_SIZE(ac_props); | |
290 | ac->charger.get_property = get_ac_property; | |
291 | power_supply_register(&ac->device->dev, &ac->charger); | |
97749cd9 | 292 | #endif |
1da177e4 | 293 | |
4be44fcd LB |
294 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", |
295 | acpi_device_name(device), acpi_device_bid(device), | |
296 | ac->state ? "on-line" : "off-line"); | |
1da177e4 | 297 | |
4be44fcd | 298 | end: |
1da177e4 | 299 | if (result) { |
fdcedbba | 300 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 301 | acpi_ac_remove_fs(device); |
8a246ee4 | 302 | #endif |
1da177e4 LT |
303 | kfree(ac); |
304 | } | |
305 | ||
d550d98d | 306 | return result; |
1da177e4 LT |
307 | } |
308 | ||
5bfeca31 AS |
309 | static int acpi_ac_resume(struct acpi_device *device) |
310 | { | |
311 | struct acpi_ac *ac; | |
312 | unsigned old_state; | |
313 | if (!device || !acpi_driver_data(device)) | |
314 | return -EINVAL; | |
315 | ac = acpi_driver_data(device); | |
316 | old_state = ac->state; | |
317 | if (acpi_ac_get_state(ac)) | |
318 | return 0; | |
97749cd9 | 319 | #ifdef CONFIG_ACPI_SYSFS_POWER |
5bfeca31 AS |
320 | if (old_state != ac->state) |
321 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); | |
97749cd9 | 322 | #endif |
5bfeca31 AS |
323 | return 0; |
324 | } | |
325 | ||
4be44fcd | 326 | static int acpi_ac_remove(struct acpi_device *device, int type) |
1da177e4 | 327 | { |
4be44fcd | 328 | struct acpi_ac *ac = NULL; |
1da177e4 | 329 | |
1da177e4 LT |
330 | |
331 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 332 | return -EINVAL; |
1da177e4 | 333 | |
50dd0969 | 334 | ac = acpi_driver_data(device); |
1da177e4 | 335 | |
97749cd9 | 336 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d5b4a3d0 AS |
337 | if (ac->charger.dev) |
338 | power_supply_unregister(&ac->charger); | |
97749cd9 | 339 | #endif |
fdcedbba | 340 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 341 | acpi_ac_remove_fs(device); |
8a246ee4 | 342 | #endif |
1da177e4 LT |
343 | |
344 | kfree(ac); | |
345 | ||
d550d98d | 346 | return 0; |
1da177e4 LT |
347 | } |
348 | ||
4be44fcd | 349 | static int __init acpi_ac_init(void) |
1da177e4 | 350 | { |
3f86b832 | 351 | int result; |
1da177e4 | 352 | |
4d8316d5 PM |
353 | if (acpi_disabled) |
354 | return -ENODEV; | |
1da177e4 | 355 | |
fdcedbba | 356 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 357 | acpi_ac_dir = acpi_lock_ac_dir(); |
1da177e4 | 358 | if (!acpi_ac_dir) |
d550d98d | 359 | return -ENODEV; |
8a246ee4 | 360 | #endif |
1da177e4 LT |
361 | |
362 | result = acpi_bus_register_driver(&acpi_ac_driver); | |
363 | if (result < 0) { | |
fdcedbba | 364 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 365 | acpi_unlock_ac_dir(acpi_ac_dir); |
8a246ee4 | 366 | #endif |
d550d98d | 367 | return -ENODEV; |
1da177e4 LT |
368 | } |
369 | ||
d550d98d | 370 | return 0; |
1da177e4 LT |
371 | } |
372 | ||
4be44fcd | 373 | static void __exit acpi_ac_exit(void) |
1da177e4 | 374 | { |
1da177e4 LT |
375 | |
376 | acpi_bus_unregister_driver(&acpi_ac_driver); | |
377 | ||
fdcedbba | 378 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 379 | acpi_unlock_ac_dir(acpi_ac_dir); |
8a246ee4 | 380 | #endif |
1da177e4 | 381 | |
d550d98d | 382 | return; |
1da177e4 LT |
383 | } |
384 | ||
1da177e4 LT |
385 | module_init(acpi_ac_init); |
386 | module_exit(acpi_ac_exit); |