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