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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> | |
0ab5bb64 LT |
31 | #include <linux/dmi.h> |
32 | #include <linux/delay.h> | |
fdcedbba | 33 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 LT |
34 | #include <linux/proc_fs.h> |
35 | #include <linux/seq_file.h> | |
8a246ee4 | 36 | #endif |
d5b4a3d0 | 37 | #include <linux/power_supply.h> |
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 | 64 | static int acpi_ac_add(struct acpi_device *device); |
51fac838 | 65 | static int acpi_ac_remove(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 | ||
90692404 | 74 | #ifdef CONFIG_PM_SLEEP |
ccda7069 | 75 | static int acpi_ac_resume(struct device *dev); |
90692404 | 76 | #endif |
ccda7069 RW |
77 | static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume); |
78 | ||
0ab5bb64 LT |
79 | static int ac_sleep_before_get_state_ms; |
80 | ||
1da177e4 | 81 | static struct acpi_driver acpi_ac_driver = { |
c2b6705b | 82 | .name = "ac", |
4be44fcd | 83 | .class = ACPI_AC_CLASS, |
1ba90e3a | 84 | .ids = ac_device_ids, |
48fe1127 | 85 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
4be44fcd LB |
86 | .ops = { |
87 | .add = acpi_ac_add, | |
88 | .remove = acpi_ac_remove, | |
48fe1127 | 89 | .notify = acpi_ac_notify, |
4be44fcd | 90 | }, |
ccda7069 | 91 | .drv.pm = &acpi_ac_pm, |
1da177e4 LT |
92 | }; |
93 | ||
94 | struct acpi_ac { | |
d5b4a3d0 | 95 | struct power_supply charger; |
af96179a | 96 | struct acpi_device * device; |
27663c58 | 97 | unsigned long long state; |
1da177e4 LT |
98 | }; |
99 | ||
497888cf | 100 | #define to_acpi_ac(x) container_of(x, struct acpi_ac, charger) |
d5b4a3d0 | 101 | |
fdcedbba | 102 | #ifdef CONFIG_ACPI_PROCFS_POWER |
d7508032 | 103 | static const struct file_operations acpi_ac_fops = { |
cf7acfab | 104 | .owner = THIS_MODULE, |
4be44fcd LB |
105 | .open = acpi_ac_open_fs, |
106 | .read = seq_read, | |
107 | .llseek = seq_lseek, | |
108 | .release = single_release, | |
1da177e4 | 109 | }; |
8a246ee4 | 110 | #endif |
d5b4a3d0 | 111 | |
1da177e4 LT |
112 | /* -------------------------------------------------------------------------- |
113 | AC Adapter Management | |
114 | -------------------------------------------------------------------------- */ | |
115 | ||
4be44fcd | 116 | static int acpi_ac_get_state(struct acpi_ac *ac) |
1da177e4 | 117 | { |
4be44fcd | 118 | acpi_status status = AE_OK; |
1da177e4 | 119 | |
1da177e4 LT |
120 | |
121 | if (!ac) | |
d550d98d | 122 | return -EINVAL; |
1da177e4 | 123 | |
a6ba5ebe | 124 | status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state); |
1da177e4 | 125 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 126 | ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state")); |
1da177e4 | 127 | ac->state = ACPI_AC_STATUS_UNKNOWN; |
d550d98d | 128 | return -ENODEV; |
1da177e4 | 129 | } |
4be44fcd | 130 | |
d550d98d | 131 | return 0; |
1da177e4 LT |
132 | } |
133 | ||
3151dbb0 ZR |
134 | /* -------------------------------------------------------------------------- |
135 | sysfs I/F | |
136 | -------------------------------------------------------------------------- */ | |
137 | static int get_ac_property(struct power_supply *psy, | |
138 | enum power_supply_property psp, | |
139 | union power_supply_propval *val) | |
140 | { | |
141 | struct acpi_ac *ac = to_acpi_ac(psy); | |
142 | ||
143 | if (!ac) | |
144 | return -ENODEV; | |
145 | ||
146 | if (acpi_ac_get_state(ac)) | |
147 | return -ENODEV; | |
148 | ||
149 | switch (psp) { | |
150 | case POWER_SUPPLY_PROP_ONLINE: | |
151 | val->intval = ac->state; | |
152 | break; | |
153 | default: | |
154 | return -EINVAL; | |
155 | } | |
156 | return 0; | |
157 | } | |
158 | ||
159 | static enum power_supply_property ac_props[] = { | |
160 | POWER_SUPPLY_PROP_ONLINE, | |
161 | }; | |
162 | ||
fdcedbba | 163 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 LT |
164 | /* -------------------------------------------------------------------------- |
165 | FS Interface (/proc) | |
166 | -------------------------------------------------------------------------- */ | |
167 | ||
4be44fcd | 168 | static struct proc_dir_entry *acpi_ac_dir; |
1da177e4 LT |
169 | |
170 | static int acpi_ac_seq_show(struct seq_file *seq, void *offset) | |
171 | { | |
50dd0969 | 172 | struct acpi_ac *ac = seq->private; |
1da177e4 | 173 | |
1da177e4 LT |
174 | |
175 | if (!ac) | |
d550d98d | 176 | return 0; |
1da177e4 LT |
177 | |
178 | if (acpi_ac_get_state(ac)) { | |
179 | seq_puts(seq, "ERROR: Unable to read AC Adapter state\n"); | |
d550d98d | 180 | return 0; |
1da177e4 LT |
181 | } |
182 | ||
183 | seq_puts(seq, "state: "); | |
184 | switch (ac->state) { | |
185 | case ACPI_AC_STATUS_OFFLINE: | |
186 | seq_puts(seq, "off-line\n"); | |
187 | break; | |
188 | case ACPI_AC_STATUS_ONLINE: | |
189 | seq_puts(seq, "on-line\n"); | |
190 | break; | |
191 | default: | |
192 | seq_puts(seq, "unknown\n"); | |
193 | break; | |
194 | } | |
195 | ||
d550d98d | 196 | return 0; |
1da177e4 | 197 | } |
4be44fcd | 198 | |
1da177e4 LT |
199 | static int acpi_ac_open_fs(struct inode *inode, struct file *file) |
200 | { | |
d9dda78b | 201 | return single_open(file, acpi_ac_seq_show, PDE_DATA(inode)); |
1da177e4 LT |
202 | } |
203 | ||
4be44fcd | 204 | static int acpi_ac_add_fs(struct acpi_device *device) |
1da177e4 | 205 | { |
4be44fcd | 206 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 207 | |
6d855fcd ZR |
208 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded," |
209 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); | |
1da177e4 LT |
210 | if (!acpi_device_dir(device)) { |
211 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 212 | acpi_ac_dir); |
1da177e4 | 213 | if (!acpi_device_dir(device)) |
d550d98d | 214 | return -ENODEV; |
1da177e4 LT |
215 | } |
216 | ||
217 | /* 'state' [R] */ | |
cf7acfab DL |
218 | entry = proc_create_data(ACPI_AC_FILE_STATE, |
219 | S_IRUGO, acpi_device_dir(device), | |
220 | &acpi_ac_fops, acpi_driver_data(device)); | |
1da177e4 | 221 | if (!entry) |
d550d98d | 222 | return -ENODEV; |
d550d98d | 223 | return 0; |
1da177e4 LT |
224 | } |
225 | ||
4be44fcd | 226 | static int acpi_ac_remove_fs(struct acpi_device *device) |
1da177e4 | 227 | { |
1da177e4 LT |
228 | |
229 | if (acpi_device_dir(device)) { | |
4be44fcd | 230 | remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device)); |
1da177e4 LT |
231 | |
232 | remove_proc_entry(acpi_device_bid(device), acpi_ac_dir); | |
233 | acpi_device_dir(device) = NULL; | |
234 | } | |
235 | ||
d550d98d | 236 | return 0; |
1da177e4 | 237 | } |
8a246ee4 | 238 | #endif |
1da177e4 | 239 | |
1da177e4 LT |
240 | /* -------------------------------------------------------------------------- |
241 | Driver Model | |
242 | -------------------------------------------------------------------------- */ | |
243 | ||
48fe1127 | 244 | static void acpi_ac_notify(struct acpi_device *device, u32 event) |
1da177e4 | 245 | { |
48fe1127 | 246 | struct acpi_ac *ac = acpi_driver_data(device); |
1da177e4 | 247 | |
1da177e4 LT |
248 | |
249 | if (!ac) | |
d550d98d | 250 | return; |
1da177e4 | 251 | |
1da177e4 | 252 | switch (event) { |
f163ff51 LB |
253 | default: |
254 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
255 | "Unsupported event [0x%x]\n", event)); | |
1da177e4 | 256 | case ACPI_AC_NOTIFY_STATUS: |
03d78252 CL |
257 | case ACPI_NOTIFY_BUS_CHECK: |
258 | case ACPI_NOTIFY_DEVICE_CHECK: | |
0ab5bb64 LT |
259 | /* |
260 | * A buggy BIOS may notify AC first and then sleep for | |
261 | * a specific time before doing actual operations in the | |
262 | * EC event handler (_Qxx). This will cause the AC state | |
263 | * reported by the ACPI event to be incorrect, so wait for a | |
264 | * specific time for the EC event handler to make progress. | |
265 | */ | |
266 | if (ac_sleep_before_get_state_ms > 0) | |
267 | msleep(ac_sleep_before_get_state_ms); | |
268 | ||
1da177e4 | 269 | acpi_ac_get_state(ac); |
962ce8ca | 270 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 271 | dev_name(&device->dev), event, |
962ce8ca | 272 | (u32) ac->state); |
68b92b56 | 273 | acpi_notifier_call_chain(device, event, (u32) ac->state); |
d5b4a3d0 | 274 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); |
1da177e4 LT |
275 | } |
276 | ||
d550d98d | 277 | return; |
1da177e4 LT |
278 | } |
279 | ||
0ab5bb64 LT |
280 | static int thinkpad_e530_quirk(const struct dmi_system_id *d) |
281 | { | |
282 | ac_sleep_before_get_state_ms = 1000; | |
283 | return 0; | |
284 | } | |
285 | ||
286 | static struct dmi_system_id ac_dmi_table[] = { | |
287 | { | |
288 | .callback = thinkpad_e530_quirk, | |
289 | .ident = "thinkpad e530", | |
290 | .matches = { | |
291 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
292 | DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"), | |
293 | }, | |
294 | }, | |
295 | {}, | |
296 | }; | |
297 | ||
4be44fcd | 298 | static int acpi_ac_add(struct acpi_device *device) |
1da177e4 | 299 | { |
4be44fcd | 300 | int result = 0; |
4be44fcd | 301 | struct acpi_ac *ac = NULL; |
1da177e4 | 302 | |
1da177e4 LT |
303 | |
304 | if (!device) | |
d550d98d | 305 | return -EINVAL; |
1da177e4 | 306 | |
36bcbec7 | 307 | ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL); |
1da177e4 | 308 | if (!ac) |
d550d98d | 309 | return -ENOMEM; |
1da177e4 | 310 | |
af96179a | 311 | ac->device = device; |
1da177e4 LT |
312 | strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME); |
313 | strcpy(acpi_device_class(device), ACPI_AC_CLASS); | |
db89b4f0 | 314 | device->driver_data = ac; |
1da177e4 LT |
315 | |
316 | result = acpi_ac_get_state(ac); | |
317 | if (result) | |
318 | goto end; | |
319 | ||
fdcedbba | 320 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 321 | result = acpi_ac_add_fs(device); |
8a246ee4 | 322 | #endif |
1da177e4 LT |
323 | if (result) |
324 | goto end; | |
d5b4a3d0 AS |
325 | ac->charger.name = acpi_device_bid(device); |
326 | ac->charger.type = POWER_SUPPLY_TYPE_MAINS; | |
327 | ac->charger.properties = ac_props; | |
328 | ac->charger.num_properties = ARRAY_SIZE(ac_props); | |
329 | ac->charger.get_property = get_ac_property; | |
f197ac13 LT |
330 | result = power_supply_register(&ac->device->dev, &ac->charger); |
331 | if (result) | |
332 | goto end; | |
1da177e4 | 333 | |
4be44fcd LB |
334 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", |
335 | acpi_device_name(device), acpi_device_bid(device), | |
336 | ac->state ? "on-line" : "off-line"); | |
1da177e4 | 337 | |
4be44fcd | 338 | end: |
1da177e4 | 339 | if (result) { |
fdcedbba | 340 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 341 | acpi_ac_remove_fs(device); |
8a246ee4 | 342 | #endif |
1da177e4 LT |
343 | kfree(ac); |
344 | } | |
345 | ||
0ab5bb64 | 346 | dmi_check_system(ac_dmi_table); |
d550d98d | 347 | return result; |
1da177e4 LT |
348 | } |
349 | ||
90692404 | 350 | #ifdef CONFIG_PM_SLEEP |
ccda7069 | 351 | static int acpi_ac_resume(struct device *dev) |
5bfeca31 AS |
352 | { |
353 | struct acpi_ac *ac; | |
354 | unsigned old_state; | |
ccda7069 RW |
355 | |
356 | if (!dev) | |
357 | return -EINVAL; | |
358 | ||
359 | ac = acpi_driver_data(to_acpi_device(dev)); | |
360 | if (!ac) | |
5bfeca31 | 361 | return -EINVAL; |
ccda7069 | 362 | |
5bfeca31 AS |
363 | old_state = ac->state; |
364 | if (acpi_ac_get_state(ac)) | |
365 | return 0; | |
366 | if (old_state != ac->state) | |
367 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); | |
368 | return 0; | |
369 | } | |
90692404 | 370 | #endif |
5bfeca31 | 371 | |
51fac838 | 372 | static int acpi_ac_remove(struct acpi_device *device) |
1da177e4 | 373 | { |
4be44fcd | 374 | struct acpi_ac *ac = NULL; |
1da177e4 | 375 | |
1da177e4 LT |
376 | |
377 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 378 | return -EINVAL; |
1da177e4 | 379 | |
50dd0969 | 380 | ac = acpi_driver_data(device); |
1da177e4 | 381 | |
d5b4a3d0 AS |
382 | if (ac->charger.dev) |
383 | power_supply_unregister(&ac->charger); | |
fdcedbba | 384 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 385 | acpi_ac_remove_fs(device); |
8a246ee4 | 386 | #endif |
1da177e4 LT |
387 | |
388 | kfree(ac); | |
389 | ||
d550d98d | 390 | return 0; |
1da177e4 LT |
391 | } |
392 | ||
4be44fcd | 393 | static int __init acpi_ac_init(void) |
1da177e4 | 394 | { |
3f86b832 | 395 | int result; |
1da177e4 | 396 | |
4d8316d5 PM |
397 | if (acpi_disabled) |
398 | return -ENODEV; | |
1da177e4 | 399 | |
fdcedbba | 400 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 401 | acpi_ac_dir = acpi_lock_ac_dir(); |
1da177e4 | 402 | if (!acpi_ac_dir) |
d550d98d | 403 | return -ENODEV; |
8a246ee4 | 404 | #endif |
1da177e4 LT |
405 | |
406 | result = acpi_bus_register_driver(&acpi_ac_driver); | |
407 | if (result < 0) { | |
fdcedbba | 408 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 409 | acpi_unlock_ac_dir(acpi_ac_dir); |
8a246ee4 | 410 | #endif |
d550d98d | 411 | return -ENODEV; |
1da177e4 LT |
412 | } |
413 | ||
d550d98d | 414 | return 0; |
1da177e4 LT |
415 | } |
416 | ||
4be44fcd | 417 | static void __exit acpi_ac_exit(void) |
1da177e4 | 418 | { |
1da177e4 LT |
419 | |
420 | acpi_bus_unregister_driver(&acpi_ac_driver); | |
421 | ||
fdcedbba | 422 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 423 | acpi_unlock_ac_dir(acpi_ac_dir); |
8a246ee4 | 424 | #endif |
1da177e4 | 425 | |
d550d98d | 426 | return; |
1da177e4 LT |
427 | } |
428 | ||
1da177e4 LT |
429 | module_init(acpi_ac_init); |
430 | module_exit(acpi_ac_exit); |