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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> | |
8a246ee4 | 30 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 LT |
31 | #include <linux/proc_fs.h> |
32 | #include <linux/seq_file.h> | |
8a246ee4 | 33 | #endif |
d5b4a3d0 | 34 | #include <linux/power_supply.h> |
1da177e4 LT |
35 | #include <acpi/acpi_bus.h> |
36 | #include <acpi/acpi_drivers.h> | |
37 | ||
1da177e4 LT |
38 | #define ACPI_AC_COMPONENT 0x00020000 |
39 | #define ACPI_AC_CLASS "ac_adapter" | |
1da177e4 LT |
40 | #define ACPI_AC_DEVICE_NAME "AC Adapter" |
41 | #define ACPI_AC_FILE_STATE "state" | |
42 | #define ACPI_AC_NOTIFY_STATUS 0x80 | |
43 | #define ACPI_AC_STATUS_OFFLINE 0x00 | |
44 | #define ACPI_AC_STATUS_ONLINE 0x01 | |
45 | #define ACPI_AC_STATUS_UNKNOWN 0xFF | |
46 | ||
47 | #define _COMPONENT ACPI_AC_COMPONENT | |
f52fd66d | 48 | ACPI_MODULE_NAME("ac"); |
1da177e4 | 49 | |
f52fd66d | 50 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 51 | MODULE_DESCRIPTION("ACPI AC Adapter Driver"); |
1da177e4 LT |
52 | MODULE_LICENSE("GPL"); |
53 | ||
8a246ee4 | 54 | #ifdef CONFIG_ACPI_PROCFS |
3f86b832 RT |
55 | extern struct proc_dir_entry *acpi_lock_ac_dir(void); |
56 | extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir); | |
8a246ee4 AB |
57 | static int acpi_ac_open_fs(struct inode *inode, struct file *file); |
58 | #endif | |
3f86b832 | 59 | |
4be44fcd LB |
60 | static int acpi_ac_add(struct acpi_device *device); |
61 | static int acpi_ac_remove(struct acpi_device *device, int type); | |
5bfeca31 | 62 | static int acpi_ac_resume(struct acpi_device *device); |
1da177e4 | 63 | |
1ba90e3a TR |
64 | const static struct acpi_device_id ac_device_ids[] = { |
65 | {"ACPI0003", 0}, | |
66 | {"", 0}, | |
67 | }; | |
68 | MODULE_DEVICE_TABLE(acpi, ac_device_ids); | |
69 | ||
1da177e4 | 70 | static struct acpi_driver acpi_ac_driver = { |
c2b6705b | 71 | .name = "ac", |
4be44fcd | 72 | .class = ACPI_AC_CLASS, |
1ba90e3a | 73 | .ids = ac_device_ids, |
4be44fcd LB |
74 | .ops = { |
75 | .add = acpi_ac_add, | |
76 | .remove = acpi_ac_remove, | |
5bfeca31 | 77 | .resume = acpi_ac_resume, |
4be44fcd | 78 | }, |
1da177e4 LT |
79 | }; |
80 | ||
81 | struct acpi_ac { | |
d5b4a3d0 | 82 | struct power_supply charger; |
af96179a | 83 | struct acpi_device * device; |
4be44fcd | 84 | unsigned long state; |
1da177e4 LT |
85 | }; |
86 | ||
d5b4a3d0 AS |
87 | #define to_acpi_ac(x) container_of(x, struct acpi_ac, charger); |
88 | ||
8a246ee4 | 89 | #ifdef CONFIG_ACPI_PROCFS |
d7508032 | 90 | static const struct file_operations acpi_ac_fops = { |
4be44fcd LB |
91 | .open = acpi_ac_open_fs, |
92 | .read = seq_read, | |
93 | .llseek = seq_lseek, | |
94 | .release = single_release, | |
1da177e4 | 95 | }; |
8a246ee4 AB |
96 | #endif |
97 | ||
d5b4a3d0 AS |
98 | static int get_ac_property(struct power_supply *psy, |
99 | enum power_supply_property psp, | |
100 | union power_supply_propval *val) | |
101 | { | |
102 | struct acpi_ac *ac = to_acpi_ac(psy); | |
103 | switch (psp) { | |
104 | case POWER_SUPPLY_PROP_ONLINE: | |
105 | val->intval = ac->state; | |
106 | break; | |
107 | default: | |
108 | return -EINVAL; | |
109 | } | |
110 | return 0; | |
111 | } | |
112 | ||
113 | static enum power_supply_property ac_props[] = { | |
114 | POWER_SUPPLY_PROP_ONLINE, | |
115 | }; | |
1da177e4 LT |
116 | |
117 | /* -------------------------------------------------------------------------- | |
118 | AC Adapter Management | |
119 | -------------------------------------------------------------------------- */ | |
120 | ||
4be44fcd | 121 | static int acpi_ac_get_state(struct acpi_ac *ac) |
1da177e4 | 122 | { |
4be44fcd | 123 | acpi_status status = AE_OK; |
1da177e4 | 124 | |
1da177e4 LT |
125 | |
126 | if (!ac) | |
d550d98d | 127 | return -EINVAL; |
1da177e4 | 128 | |
a6ba5ebe | 129 | status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state); |
1da177e4 | 130 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 131 | ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state")); |
1da177e4 | 132 | ac->state = ACPI_AC_STATUS_UNKNOWN; |
d550d98d | 133 | return -ENODEV; |
1da177e4 | 134 | } |
4be44fcd | 135 | |
d550d98d | 136 | return 0; |
1da177e4 LT |
137 | } |
138 | ||
8a246ee4 | 139 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 LT |
140 | /* -------------------------------------------------------------------------- |
141 | FS Interface (/proc) | |
142 | -------------------------------------------------------------------------- */ | |
143 | ||
4be44fcd | 144 | static struct proc_dir_entry *acpi_ac_dir; |
1da177e4 LT |
145 | |
146 | static int acpi_ac_seq_show(struct seq_file *seq, void *offset) | |
147 | { | |
50dd0969 | 148 | struct acpi_ac *ac = seq->private; |
1da177e4 | 149 | |
1da177e4 LT |
150 | |
151 | if (!ac) | |
d550d98d | 152 | return 0; |
1da177e4 LT |
153 | |
154 | if (acpi_ac_get_state(ac)) { | |
155 | seq_puts(seq, "ERROR: Unable to read AC Adapter state\n"); | |
d550d98d | 156 | return 0; |
1da177e4 LT |
157 | } |
158 | ||
159 | seq_puts(seq, "state: "); | |
160 | switch (ac->state) { | |
161 | case ACPI_AC_STATUS_OFFLINE: | |
162 | seq_puts(seq, "off-line\n"); | |
163 | break; | |
164 | case ACPI_AC_STATUS_ONLINE: | |
165 | seq_puts(seq, "on-line\n"); | |
166 | break; | |
167 | default: | |
168 | seq_puts(seq, "unknown\n"); | |
169 | break; | |
170 | } | |
171 | ||
d550d98d | 172 | return 0; |
1da177e4 | 173 | } |
4be44fcd | 174 | |
1da177e4 LT |
175 | static int acpi_ac_open_fs(struct inode *inode, struct file *file) |
176 | { | |
177 | return single_open(file, acpi_ac_seq_show, PDE(inode)->data); | |
178 | } | |
179 | ||
4be44fcd | 180 | static int acpi_ac_add_fs(struct acpi_device *device) |
1da177e4 | 181 | { |
4be44fcd | 182 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 183 | |
1da177e4 LT |
184 | |
185 | if (!acpi_device_dir(device)) { | |
186 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 187 | acpi_ac_dir); |
1da177e4 | 188 | if (!acpi_device_dir(device)) |
d550d98d | 189 | return -ENODEV; |
1da177e4 LT |
190 | acpi_device_dir(device)->owner = THIS_MODULE; |
191 | } | |
192 | ||
193 | /* 'state' [R] */ | |
194 | entry = create_proc_entry(ACPI_AC_FILE_STATE, | |
4be44fcd | 195 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 196 | if (!entry) |
d550d98d | 197 | return -ENODEV; |
1da177e4 LT |
198 | else { |
199 | entry->proc_fops = &acpi_ac_fops; | |
200 | entry->data = acpi_driver_data(device); | |
201 | entry->owner = THIS_MODULE; | |
202 | } | |
203 | ||
d550d98d | 204 | return 0; |
1da177e4 LT |
205 | } |
206 | ||
4be44fcd | 207 | static 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 | 225 | static 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 LT |
235 | switch (event) { |
236 | case ACPI_AC_NOTIFY_STATUS: | |
03d78252 CL |
237 | case ACPI_NOTIFY_BUS_CHECK: |
238 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1da177e4 | 239 | acpi_ac_get_state(ac); |
14e04fb3 | 240 | acpi_bus_generate_proc_event(device, event, (u32) ac->state); |
962ce8ca ZR |
241 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
242 | device->dev.bus_id, event, | |
243 | (u32) ac->state); | |
d5b4a3d0 | 244 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); |
1da177e4 LT |
245 | break; |
246 | default: | |
247 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 248 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
249 | break; |
250 | } | |
251 | ||
d550d98d | 252 | return; |
1da177e4 LT |
253 | } |
254 | ||
4be44fcd | 255 | static 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 | ||
8a246ee4 | 278 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 | 279 | result = acpi_ac_add_fs(device); |
8a246ee4 | 280 | #endif |
1da177e4 LT |
281 | if (result) |
282 | goto end; | |
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); | |
a6ba5ebe | 289 | status = acpi_install_notify_handler(device->handle, |
03d78252 | 290 | ACPI_ALL_NOTIFY, acpi_ac_notify, |
4be44fcd | 291 | ac); |
1da177e4 | 292 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
293 | result = -ENODEV; |
294 | goto end; | |
295 | } | |
296 | ||
4be44fcd LB |
297 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", |
298 | acpi_device_name(device), acpi_device_bid(device), | |
299 | ac->state ? "on-line" : "off-line"); | |
1da177e4 | 300 | |
4be44fcd | 301 | end: |
1da177e4 | 302 | if (result) { |
8a246ee4 | 303 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 | 304 | acpi_ac_remove_fs(device); |
8a246ee4 | 305 | #endif |
1da177e4 LT |
306 | kfree(ac); |
307 | } | |
308 | ||
d550d98d | 309 | return result; |
1da177e4 LT |
310 | } |
311 | ||
5bfeca31 AS |
312 | static int acpi_ac_resume(struct acpi_device *device) |
313 | { | |
314 | struct acpi_ac *ac; | |
315 | unsigned old_state; | |
316 | if (!device || !acpi_driver_data(device)) | |
317 | return -EINVAL; | |
318 | ac = acpi_driver_data(device); | |
319 | old_state = ac->state; | |
320 | if (acpi_ac_get_state(ac)) | |
321 | return 0; | |
322 | if (old_state != ac->state) | |
323 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); | |
324 | return 0; | |
325 | } | |
326 | ||
4be44fcd | 327 | static int acpi_ac_remove(struct acpi_device *device, int type) |
1da177e4 | 328 | { |
4be44fcd LB |
329 | acpi_status status = AE_OK; |
330 | struct acpi_ac *ac = NULL; | |
1da177e4 | 331 | |
1da177e4 LT |
332 | |
333 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 334 | return -EINVAL; |
1da177e4 | 335 | |
50dd0969 | 336 | ac = acpi_driver_data(device); |
1da177e4 | 337 | |
a6ba5ebe | 338 | status = acpi_remove_notify_handler(device->handle, |
03d78252 | 339 | ACPI_ALL_NOTIFY, acpi_ac_notify); |
d5b4a3d0 AS |
340 | if (ac->charger.dev) |
341 | power_supply_unregister(&ac->charger); | |
8a246ee4 | 342 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 | 343 | acpi_ac_remove_fs(device); |
8a246ee4 | 344 | #endif |
1da177e4 LT |
345 | |
346 | kfree(ac); | |
347 | ||
d550d98d | 348 | return 0; |
1da177e4 LT |
349 | } |
350 | ||
4be44fcd | 351 | static int __init acpi_ac_init(void) |
1da177e4 | 352 | { |
3f86b832 | 353 | int result; |
1da177e4 | 354 | |
4d8316d5 PM |
355 | if (acpi_disabled) |
356 | return -ENODEV; | |
1da177e4 | 357 | |
8a246ee4 | 358 | #ifdef CONFIG_ACPI_PROCFS |
3f86b832 | 359 | acpi_ac_dir = acpi_lock_ac_dir(); |
1da177e4 | 360 | if (!acpi_ac_dir) |
d550d98d | 361 | return -ENODEV; |
8a246ee4 | 362 | #endif |
1da177e4 LT |
363 | |
364 | result = acpi_bus_register_driver(&acpi_ac_driver); | |
365 | if (result < 0) { | |
8a246ee4 | 366 | #ifdef CONFIG_ACPI_PROCFS |
3f86b832 | 367 | acpi_unlock_ac_dir(acpi_ac_dir); |
8a246ee4 | 368 | #endif |
d550d98d | 369 | return -ENODEV; |
1da177e4 LT |
370 | } |
371 | ||
d550d98d | 372 | return 0; |
1da177e4 LT |
373 | } |
374 | ||
4be44fcd | 375 | static void __exit acpi_ac_exit(void) |
1da177e4 | 376 | { |
1da177e4 LT |
377 | |
378 | acpi_bus_unregister_driver(&acpi_ac_driver); | |
379 | ||
8a246ee4 | 380 | #ifdef CONFIG_ACPI_PROCFS |
3f86b832 | 381 | acpi_unlock_ac_dir(acpi_ac_dir); |
8a246ee4 | 382 | #endif |
1da177e4 | 383 | |
d550d98d | 384 | return; |
1da177e4 LT |
385 | } |
386 | ||
1da177e4 LT |
387 | module_init(acpi_ac_init); |
388 | module_exit(acpi_ac_exit); |