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