Commit | Line | Data |
---|---|---|
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> | |
e63f6e28 LT |
33 | #ifdef CONFIG_ACPI_PROCFS_POWER |
34 | #include <linux/proc_fs.h> | |
35 | #include <linux/seq_file.h> | |
36 | #endif | |
cc8ef527 | 37 | #include <linux/platform_device.h> |
d5b4a3d0 | 38 | #include <linux/power_supply.h> |
8b48463f | 39 | #include <linux/acpi.h> |
4eee4f03 | 40 | #include "battery.h" |
1da177e4 | 41 | |
a192a958 LB |
42 | #define PREFIX "ACPI: " |
43 | ||
1da177e4 | 44 | #define ACPI_AC_CLASS "ac_adapter" |
1da177e4 LT |
45 | #define ACPI_AC_DEVICE_NAME "AC Adapter" |
46 | #define ACPI_AC_FILE_STATE "state" | |
47 | #define ACPI_AC_NOTIFY_STATUS 0x80 | |
48 | #define ACPI_AC_STATUS_OFFLINE 0x00 | |
49 | #define ACPI_AC_STATUS_ONLINE 0x01 | |
50 | #define ACPI_AC_STATUS_UNKNOWN 0xFF | |
51 | ||
52 | #define _COMPONENT ACPI_AC_COMPONENT | |
f52fd66d | 53 | ACPI_MODULE_NAME("ac"); |
1da177e4 | 54 | |
f52fd66d | 55 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 56 | MODULE_DESCRIPTION("ACPI AC Adapter Driver"); |
1da177e4 LT |
57 | MODULE_LICENSE("GPL"); |
58 | ||
e63f6e28 | 59 | |
98012849 GR |
60 | static int acpi_ac_add(struct acpi_device *device); |
61 | static int acpi_ac_remove(struct acpi_device *device); | |
62 | static void acpi_ac_notify(struct acpi_device *device, u32 event); | |
63 | ||
64 | static const struct acpi_device_id ac_device_ids[] = { | |
65 | {"ACPI0003", 0}, | |
66 | {"", 0}, | |
67 | }; | |
68 | MODULE_DEVICE_TABLE(acpi, ac_device_ids); | |
69 | ||
70 | #ifdef CONFIG_PM_SLEEP | |
71 | static int acpi_ac_resume(struct device *dev); | |
72 | #endif | |
73 | static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume); | |
74 | ||
e63f6e28 LT |
75 | #ifdef CONFIG_ACPI_PROCFS_POWER |
76 | extern struct proc_dir_entry *acpi_lock_ac_dir(void); | |
77 | extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir); | |
78 | static int acpi_ac_open_fs(struct inode *inode, struct file *file); | |
79 | #endif | |
80 | ||
81 | ||
0ab5bb64 LT |
82 | static int ac_sleep_before_get_state_ms; |
83 | ||
98012849 GR |
84 | static struct acpi_driver acpi_ac_driver = { |
85 | .name = "ac", | |
86 | .class = ACPI_AC_CLASS, | |
87 | .ids = ac_device_ids, | |
88 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, | |
89 | .ops = { | |
90 | .add = acpi_ac_add, | |
91 | .remove = acpi_ac_remove, | |
92 | .notify = acpi_ac_notify, | |
93 | }, | |
94 | .drv.pm = &acpi_ac_pm, | |
95 | }; | |
96 | ||
1da177e4 | 97 | struct acpi_ac { |
297d716f KK |
98 | struct power_supply *charger; |
99 | struct power_supply_desc charger_desc; | |
98012849 | 100 | struct acpi_device * device; |
27663c58 | 101 | unsigned long long state; |
4eee4f03 | 102 | struct notifier_block battery_nb; |
1da177e4 LT |
103 | }; |
104 | ||
297d716f | 105 | #define to_acpi_ac(x) power_supply_get_drvdata(x) |
d5b4a3d0 | 106 | |
e63f6e28 LT |
107 | #ifdef CONFIG_ACPI_PROCFS_POWER |
108 | static const struct file_operations acpi_ac_fops = { | |
109 | .owner = THIS_MODULE, | |
110 | .open = acpi_ac_open_fs, | |
111 | .read = seq_read, | |
112 | .llseek = seq_lseek, | |
113 | .release = single_release, | |
114 | }; | |
115 | #endif | |
116 | ||
1da177e4 LT |
117 | /* -------------------------------------------------------------------------- |
118 | AC Adapter Management | |
119 | -------------------------------------------------------------------------- */ | |
120 | ||
4be44fcd | 121 | static int acpi_ac_get_state(struct acpi_ac *ac) |
1da177e4 | 122 | { |
98012849 GR |
123 | acpi_status status = AE_OK; |
124 | ||
125 | if (!ac) | |
126 | return -EINVAL; | |
1da177e4 | 127 | |
98012849 | 128 | status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, |
cc8ef527 | 129 | &ac->state); |
1da177e4 | 130 | if (ACPI_FAILURE(status)) { |
cc8ef527 ZR |
131 | ACPI_EXCEPTION((AE_INFO, status, |
132 | "Error reading AC Adapter state")); | |
1da177e4 | 133 | ac->state = ACPI_AC_STATUS_UNKNOWN; |
d550d98d | 134 | return -ENODEV; |
1da177e4 | 135 | } |
4be44fcd | 136 | |
d550d98d | 137 | return 0; |
1da177e4 LT |
138 | } |
139 | ||
3151dbb0 ZR |
140 | /* -------------------------------------------------------------------------- |
141 | sysfs I/F | |
142 | -------------------------------------------------------------------------- */ | |
143 | static int get_ac_property(struct power_supply *psy, | |
144 | enum power_supply_property psp, | |
145 | union power_supply_propval *val) | |
146 | { | |
147 | struct acpi_ac *ac = to_acpi_ac(psy); | |
148 | ||
149 | if (!ac) | |
150 | return -ENODEV; | |
151 | ||
152 | if (acpi_ac_get_state(ac)) | |
153 | return -ENODEV; | |
154 | ||
155 | switch (psp) { | |
156 | case POWER_SUPPLY_PROP_ONLINE: | |
157 | val->intval = ac->state; | |
158 | break; | |
159 | default: | |
160 | return -EINVAL; | |
161 | } | |
162 | return 0; | |
163 | } | |
164 | ||
165 | static enum power_supply_property ac_props[] = { | |
166 | POWER_SUPPLY_PROP_ONLINE, | |
167 | }; | |
168 | ||
e63f6e28 LT |
169 | #ifdef CONFIG_ACPI_PROCFS_POWER |
170 | /* -------------------------------------------------------------------------- | |
171 | FS Interface (/proc) | |
172 | -------------------------------------------------------------------------- */ | |
173 | ||
174 | static struct proc_dir_entry *acpi_ac_dir; | |
175 | ||
176 | static int acpi_ac_seq_show(struct seq_file *seq, void *offset) | |
177 | { | |
178 | struct acpi_ac *ac = seq->private; | |
179 | ||
180 | ||
181 | if (!ac) | |
182 | return 0; | |
183 | ||
184 | if (acpi_ac_get_state(ac)) { | |
185 | seq_puts(seq, "ERROR: Unable to read AC Adapter state\n"); | |
186 | return 0; | |
187 | } | |
188 | ||
189 | seq_puts(seq, "state: "); | |
190 | switch (ac->state) { | |
191 | case ACPI_AC_STATUS_OFFLINE: | |
192 | seq_puts(seq, "off-line\n"); | |
193 | break; | |
194 | case ACPI_AC_STATUS_ONLINE: | |
195 | seq_puts(seq, "on-line\n"); | |
196 | break; | |
197 | default: | |
198 | seq_puts(seq, "unknown\n"); | |
199 | break; | |
200 | } | |
201 | ||
202 | return 0; | |
203 | } | |
204 | ||
205 | static int acpi_ac_open_fs(struct inode *inode, struct file *file) | |
206 | { | |
207 | return single_open(file, acpi_ac_seq_show, PDE_DATA(inode)); | |
208 | } | |
209 | ||
210 | static int acpi_ac_add_fs(struct acpi_ac *ac) | |
211 | { | |
212 | struct proc_dir_entry *entry = NULL; | |
213 | ||
214 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded," | |
215 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); | |
216 | if (!acpi_device_dir(ac->device)) { | |
217 | acpi_device_dir(ac->device) = | |
218 | proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir); | |
219 | if (!acpi_device_dir(ac->device)) | |
220 | return -ENODEV; | |
221 | } | |
222 | ||
223 | /* 'state' [R] */ | |
224 | entry = proc_create_data(ACPI_AC_FILE_STATE, | |
225 | S_IRUGO, acpi_device_dir(ac->device), | |
226 | &acpi_ac_fops, ac); | |
227 | if (!entry) | |
228 | return -ENODEV; | |
229 | return 0; | |
230 | } | |
231 | ||
232 | static int acpi_ac_remove_fs(struct acpi_ac *ac) | |
233 | { | |
234 | ||
235 | if (acpi_device_dir(ac->device)) { | |
236 | remove_proc_entry(ACPI_AC_FILE_STATE, | |
237 | acpi_device_dir(ac->device)); | |
238 | remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir); | |
239 | acpi_device_dir(ac->device) = NULL; | |
240 | } | |
241 | ||
242 | return 0; | |
243 | } | |
244 | #endif | |
245 | ||
1da177e4 LT |
246 | /* -------------------------------------------------------------------------- |
247 | Driver Model | |
248 | -------------------------------------------------------------------------- */ | |
249 | ||
98012849 | 250 | static void acpi_ac_notify(struct acpi_device *device, u32 event) |
1da177e4 | 251 | { |
98012849 | 252 | struct acpi_ac *ac = acpi_driver_data(device); |
1da177e4 LT |
253 | |
254 | if (!ac) | |
d550d98d | 255 | return; |
1da177e4 | 256 | |
1da177e4 | 257 | switch (event) { |
f163ff51 LB |
258 | default: |
259 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
260 | "Unsupported event [0x%x]\n", event)); | |
1da177e4 | 261 | case ACPI_AC_NOTIFY_STATUS: |
03d78252 CL |
262 | case ACPI_NOTIFY_BUS_CHECK: |
263 | case ACPI_NOTIFY_DEVICE_CHECK: | |
0ab5bb64 LT |
264 | /* |
265 | * A buggy BIOS may notify AC first and then sleep for | |
266 | * a specific time before doing actual operations in the | |
267 | * EC event handler (_Qxx). This will cause the AC state | |
268 | * reported by the ACPI event to be incorrect, so wait for a | |
269 | * specific time for the EC event handler to make progress. | |
270 | */ | |
271 | if (ac_sleep_before_get_state_ms > 0) | |
272 | msleep(ac_sleep_before_get_state_ms); | |
273 | ||
1da177e4 | 274 | acpi_ac_get_state(ac); |
98012849 GR |
275 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
276 | dev_name(&device->dev), event, | |
277 | (u32) ac->state); | |
278 | acpi_notifier_call_chain(device, event, (u32) ac->state); | |
297d716f | 279 | kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE); |
1da177e4 LT |
280 | } |
281 | ||
d550d98d | 282 | return; |
1da177e4 LT |
283 | } |
284 | ||
4eee4f03 AM |
285 | static int acpi_ac_battery_notify(struct notifier_block *nb, |
286 | unsigned long action, void *data) | |
287 | { | |
288 | struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb); | |
289 | struct acpi_bus_event *event = (struct acpi_bus_event *)data; | |
290 | ||
291 | /* | |
292 | * On HP Pavilion dv6-6179er AC status notifications aren't triggered | |
293 | * when adapter is plugged/unplugged. However, battery status | |
294 | * notifcations are triggered when battery starts charging or | |
295 | * discharging. Re-reading AC status triggers lost AC notifications, | |
296 | * if AC status has changed. | |
297 | */ | |
298 | if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 && | |
299 | event->type == ACPI_BATTERY_NOTIFY_STATUS) | |
300 | acpi_ac_get_state(ac); | |
301 | ||
302 | return NOTIFY_OK; | |
303 | } | |
304 | ||
0ab5bb64 LT |
305 | static int thinkpad_e530_quirk(const struct dmi_system_id *d) |
306 | { | |
307 | ac_sleep_before_get_state_ms = 1000; | |
308 | return 0; | |
309 | } | |
310 | ||
44f610cd | 311 | static const struct dmi_system_id ac_dmi_table[] = { |
0ab5bb64 LT |
312 | { |
313 | .callback = thinkpad_e530_quirk, | |
314 | .ident = "thinkpad e530", | |
315 | .matches = { | |
316 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
317 | DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"), | |
318 | }, | |
319 | }, | |
320 | {}, | |
321 | }; | |
322 | ||
98012849 | 323 | static int acpi_ac_add(struct acpi_device *device) |
1da177e4 | 324 | { |
297d716f | 325 | struct power_supply_config psy_cfg = {}; |
4be44fcd | 326 | int result = 0; |
4be44fcd | 327 | struct acpi_ac *ac = NULL; |
1da177e4 | 328 | |
1da177e4 | 329 | |
98012849 GR |
330 | if (!device) |
331 | return -EINVAL; | |
cc8ef527 | 332 | |
36bcbec7 | 333 | ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL); |
1da177e4 | 334 | if (!ac) |
d550d98d | 335 | return -ENOMEM; |
1da177e4 | 336 | |
98012849 GR |
337 | ac->device = device; |
338 | strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME); | |
339 | strcpy(acpi_device_class(device), ACPI_AC_CLASS); | |
340 | device->driver_data = ac; | |
1da177e4 LT |
341 | |
342 | result = acpi_ac_get_state(ac); | |
343 | if (result) | |
344 | goto end; | |
345 | ||
297d716f KK |
346 | psy_cfg.drv_data = ac; |
347 | ||
348 | ac->charger_desc.name = acpi_device_bid(device); | |
e63f6e28 LT |
349 | #ifdef CONFIG_ACPI_PROCFS_POWER |
350 | result = acpi_ac_add_fs(ac); | |
351 | if (result) | |
352 | goto end; | |
353 | #endif | |
297d716f KK |
354 | ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS; |
355 | ac->charger_desc.properties = ac_props; | |
356 | ac->charger_desc.num_properties = ARRAY_SIZE(ac_props); | |
357 | ac->charger_desc.get_property = get_ac_property; | |
358 | ac->charger = power_supply_register(&ac->device->dev, | |
359 | &ac->charger_desc, &psy_cfg); | |
360 | if (IS_ERR(ac->charger)) { | |
361 | result = PTR_ERR(ac->charger); | |
f197ac13 | 362 | goto end; |
297d716f | 363 | } |
1da177e4 | 364 | |
4be44fcd | 365 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", |
98012849 | 366 | acpi_device_name(device), acpi_device_bid(device), |
4be44fcd | 367 | ac->state ? "on-line" : "off-line"); |
1da177e4 | 368 | |
4eee4f03 AM |
369 | ac->battery_nb.notifier_call = acpi_ac_battery_notify; |
370 | register_acpi_notifier(&ac->battery_nb); | |
ab0fd674 | 371 | end: |
e63f6e28 LT |
372 | if (result) { |
373 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
374 | acpi_ac_remove_fs(ac); | |
375 | #endif | |
1da177e4 | 376 | kfree(ac); |
e63f6e28 | 377 | } |
1da177e4 | 378 | |
0ab5bb64 | 379 | dmi_check_system(ac_dmi_table); |
d550d98d | 380 | return result; |
1da177e4 LT |
381 | } |
382 | ||
90692404 | 383 | #ifdef CONFIG_PM_SLEEP |
ccda7069 | 384 | static int acpi_ac_resume(struct device *dev) |
5bfeca31 AS |
385 | { |
386 | struct acpi_ac *ac; | |
387 | unsigned old_state; | |
ccda7069 RW |
388 | |
389 | if (!dev) | |
390 | return -EINVAL; | |
391 | ||
98012849 | 392 | ac = acpi_driver_data(to_acpi_device(dev)); |
ccda7069 | 393 | if (!ac) |
5bfeca31 | 394 | return -EINVAL; |
ccda7069 | 395 | |
5bfeca31 AS |
396 | old_state = ac->state; |
397 | if (acpi_ac_get_state(ac)) | |
398 | return 0; | |
399 | if (old_state != ac->state) | |
297d716f | 400 | kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE); |
5bfeca31 AS |
401 | return 0; |
402 | } | |
06521c2e SK |
403 | #else |
404 | #define acpi_ac_resume NULL | |
90692404 | 405 | #endif |
5bfeca31 | 406 | |
98012849 | 407 | static int acpi_ac_remove(struct acpi_device *device) |
1da177e4 | 408 | { |
98012849 GR |
409 | struct acpi_ac *ac = NULL; |
410 | ||
1da177e4 | 411 | |
98012849 | 412 | if (!device || !acpi_driver_data(device)) |
d550d98d | 413 | return -EINVAL; |
1da177e4 | 414 | |
98012849 | 415 | ac = acpi_driver_data(device); |
1da177e4 | 416 | |
297d716f | 417 | power_supply_unregister(ac->charger); |
4eee4f03 | 418 | unregister_acpi_notifier(&ac->battery_nb); |
cc8ef527 | 419 | |
e63f6e28 LT |
420 | #ifdef CONFIG_ACPI_PROCFS_POWER |
421 | acpi_ac_remove_fs(ac); | |
422 | #endif | |
423 | ||
1da177e4 LT |
424 | kfree(ac); |
425 | ||
d550d98d | 426 | return 0; |
1da177e4 LT |
427 | } |
428 | ||
4be44fcd | 429 | static int __init acpi_ac_init(void) |
1da177e4 | 430 | { |
3f86b832 | 431 | int result; |
1da177e4 | 432 | |
4d8316d5 PM |
433 | if (acpi_disabled) |
434 | return -ENODEV; | |
1da177e4 | 435 | |
e63f6e28 LT |
436 | #ifdef CONFIG_ACPI_PROCFS_POWER |
437 | acpi_ac_dir = acpi_lock_ac_dir(); | |
438 | if (!acpi_ac_dir) | |
439 | return -ENODEV; | |
440 | #endif | |
441 | ||
442 | ||
98012849 | 443 | result = acpi_bus_register_driver(&acpi_ac_driver); |
e63f6e28 LT |
444 | if (result < 0) { |
445 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
446 | acpi_unlock_ac_dir(acpi_ac_dir); | |
447 | #endif | |
d550d98d | 448 | return -ENODEV; |
e63f6e28 | 449 | } |
1da177e4 | 450 | |
d550d98d | 451 | return 0; |
1da177e4 LT |
452 | } |
453 | ||
4be44fcd | 454 | static void __exit acpi_ac_exit(void) |
1da177e4 | 455 | { |
98012849 | 456 | acpi_bus_unregister_driver(&acpi_ac_driver); |
e63f6e28 LT |
457 | #ifdef CONFIG_ACPI_PROCFS_POWER |
458 | acpi_unlock_ac_dir(acpi_ac_dir); | |
459 | #endif | |
1da177e4 | 460 | } |
1da177e4 LT |
461 | module_init(acpi_ac_init); |
462 | module_exit(acpi_ac_exit); |