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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> | |
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 { |
d5b4a3d0 | 98 | struct power_supply charger; |
98012849 | 99 | struct acpi_device * device; |
27663c58 | 100 | unsigned long long state; |
4eee4f03 | 101 | struct notifier_block battery_nb; |
1da177e4 LT |
102 | }; |
103 | ||
497888cf | 104 | #define to_acpi_ac(x) container_of(x, struct acpi_ac, charger) |
d5b4a3d0 | 105 | |
e63f6e28 LT |
106 | #ifdef CONFIG_ACPI_PROCFS_POWER |
107 | static const struct file_operations acpi_ac_fops = { | |
108 | .owner = THIS_MODULE, | |
109 | .open = acpi_ac_open_fs, | |
110 | .read = seq_read, | |
111 | .llseek = seq_lseek, | |
112 | .release = single_release, | |
113 | }; | |
114 | #endif | |
115 | ||
1da177e4 LT |
116 | /* -------------------------------------------------------------------------- |
117 | AC Adapter Management | |
118 | -------------------------------------------------------------------------- */ | |
119 | ||
4be44fcd | 120 | static int acpi_ac_get_state(struct acpi_ac *ac) |
1da177e4 | 121 | { |
98012849 GR |
122 | acpi_status status = AE_OK; |
123 | ||
124 | if (!ac) | |
125 | return -EINVAL; | |
1da177e4 | 126 | |
98012849 | 127 | status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, |
cc8ef527 | 128 | &ac->state); |
1da177e4 | 129 | if (ACPI_FAILURE(status)) { |
cc8ef527 ZR |
130 | ACPI_EXCEPTION((AE_INFO, status, |
131 | "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 | ||
3151dbb0 ZR |
139 | /* -------------------------------------------------------------------------- |
140 | sysfs I/F | |
141 | -------------------------------------------------------------------------- */ | |
142 | static int get_ac_property(struct power_supply *psy, | |
143 | enum power_supply_property psp, | |
144 | union power_supply_propval *val) | |
145 | { | |
146 | struct acpi_ac *ac = to_acpi_ac(psy); | |
147 | ||
148 | if (!ac) | |
149 | return -ENODEV; | |
150 | ||
151 | if (acpi_ac_get_state(ac)) | |
152 | return -ENODEV; | |
153 | ||
154 | switch (psp) { | |
155 | case POWER_SUPPLY_PROP_ONLINE: | |
156 | val->intval = ac->state; | |
157 | break; | |
158 | default: | |
159 | return -EINVAL; | |
160 | } | |
161 | return 0; | |
162 | } | |
163 | ||
164 | static enum power_supply_property ac_props[] = { | |
165 | POWER_SUPPLY_PROP_ONLINE, | |
166 | }; | |
167 | ||
e63f6e28 LT |
168 | #ifdef CONFIG_ACPI_PROCFS_POWER |
169 | /* -------------------------------------------------------------------------- | |
170 | FS Interface (/proc) | |
171 | -------------------------------------------------------------------------- */ | |
172 | ||
173 | static struct proc_dir_entry *acpi_ac_dir; | |
174 | ||
175 | static int acpi_ac_seq_show(struct seq_file *seq, void *offset) | |
176 | { | |
177 | struct acpi_ac *ac = seq->private; | |
178 | ||
179 | ||
180 | if (!ac) | |
181 | return 0; | |
182 | ||
183 | if (acpi_ac_get_state(ac)) { | |
184 | seq_puts(seq, "ERROR: Unable to read AC Adapter state\n"); | |
185 | return 0; | |
186 | } | |
187 | ||
188 | seq_puts(seq, "state: "); | |
189 | switch (ac->state) { | |
190 | case ACPI_AC_STATUS_OFFLINE: | |
191 | seq_puts(seq, "off-line\n"); | |
192 | break; | |
193 | case ACPI_AC_STATUS_ONLINE: | |
194 | seq_puts(seq, "on-line\n"); | |
195 | break; | |
196 | default: | |
197 | seq_puts(seq, "unknown\n"); | |
198 | break; | |
199 | } | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
204 | static int acpi_ac_open_fs(struct inode *inode, struct file *file) | |
205 | { | |
206 | return single_open(file, acpi_ac_seq_show, PDE_DATA(inode)); | |
207 | } | |
208 | ||
209 | static int acpi_ac_add_fs(struct acpi_ac *ac) | |
210 | { | |
211 | struct proc_dir_entry *entry = NULL; | |
212 | ||
213 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded," | |
214 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); | |
215 | if (!acpi_device_dir(ac->device)) { | |
216 | acpi_device_dir(ac->device) = | |
217 | proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir); | |
218 | if (!acpi_device_dir(ac->device)) | |
219 | return -ENODEV; | |
220 | } | |
221 | ||
222 | /* 'state' [R] */ | |
223 | entry = proc_create_data(ACPI_AC_FILE_STATE, | |
224 | S_IRUGO, acpi_device_dir(ac->device), | |
225 | &acpi_ac_fops, ac); | |
226 | if (!entry) | |
227 | return -ENODEV; | |
228 | return 0; | |
229 | } | |
230 | ||
231 | static int acpi_ac_remove_fs(struct acpi_ac *ac) | |
232 | { | |
233 | ||
234 | if (acpi_device_dir(ac->device)) { | |
235 | remove_proc_entry(ACPI_AC_FILE_STATE, | |
236 | acpi_device_dir(ac->device)); | |
237 | remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir); | |
238 | acpi_device_dir(ac->device) = NULL; | |
239 | } | |
240 | ||
241 | return 0; | |
242 | } | |
243 | #endif | |
244 | ||
1da177e4 LT |
245 | /* -------------------------------------------------------------------------- |
246 | Driver Model | |
247 | -------------------------------------------------------------------------- */ | |
248 | ||
98012849 | 249 | static void acpi_ac_notify(struct acpi_device *device, u32 event) |
1da177e4 | 250 | { |
98012849 | 251 | struct acpi_ac *ac = acpi_driver_data(device); |
1da177e4 LT |
252 | |
253 | if (!ac) | |
d550d98d | 254 | return; |
1da177e4 | 255 | |
1da177e4 | 256 | switch (event) { |
f163ff51 LB |
257 | default: |
258 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
259 | "Unsupported event [0x%x]\n", event)); | |
1da177e4 | 260 | case ACPI_AC_NOTIFY_STATUS: |
03d78252 CL |
261 | case ACPI_NOTIFY_BUS_CHECK: |
262 | case ACPI_NOTIFY_DEVICE_CHECK: | |
0ab5bb64 LT |
263 | /* |
264 | * A buggy BIOS may notify AC first and then sleep for | |
265 | * a specific time before doing actual operations in the | |
266 | * EC event handler (_Qxx). This will cause the AC state | |
267 | * reported by the ACPI event to be incorrect, so wait for a | |
268 | * specific time for the EC event handler to make progress. | |
269 | */ | |
270 | if (ac_sleep_before_get_state_ms > 0) | |
271 | msleep(ac_sleep_before_get_state_ms); | |
272 | ||
1da177e4 | 273 | acpi_ac_get_state(ac); |
98012849 GR |
274 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
275 | dev_name(&device->dev), event, | |
276 | (u32) ac->state); | |
277 | acpi_notifier_call_chain(device, event, (u32) ac->state); | |
d5b4a3d0 | 278 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); |
1da177e4 LT |
279 | } |
280 | ||
d550d98d | 281 | return; |
1da177e4 LT |
282 | } |
283 | ||
4eee4f03 AM |
284 | static int acpi_ac_battery_notify(struct notifier_block *nb, |
285 | unsigned long action, void *data) | |
286 | { | |
287 | struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb); | |
288 | struct acpi_bus_event *event = (struct acpi_bus_event *)data; | |
289 | ||
290 | /* | |
291 | * On HP Pavilion dv6-6179er AC status notifications aren't triggered | |
292 | * when adapter is plugged/unplugged. However, battery status | |
293 | * notifcations are triggered when battery starts charging or | |
294 | * discharging. Re-reading AC status triggers lost AC notifications, | |
295 | * if AC status has changed. | |
296 | */ | |
297 | if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 && | |
298 | event->type == ACPI_BATTERY_NOTIFY_STATUS) | |
299 | acpi_ac_get_state(ac); | |
300 | ||
301 | return NOTIFY_OK; | |
302 | } | |
303 | ||
0ab5bb64 LT |
304 | static int thinkpad_e530_quirk(const struct dmi_system_id *d) |
305 | { | |
306 | ac_sleep_before_get_state_ms = 1000; | |
307 | return 0; | |
308 | } | |
309 | ||
310 | static struct dmi_system_id ac_dmi_table[] = { | |
311 | { | |
312 | .callback = thinkpad_e530_quirk, | |
313 | .ident = "thinkpad e530", | |
314 | .matches = { | |
315 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
316 | DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"), | |
317 | }, | |
318 | }, | |
319 | {}, | |
320 | }; | |
321 | ||
98012849 | 322 | static int acpi_ac_add(struct acpi_device *device) |
1da177e4 | 323 | { |
4be44fcd | 324 | int result = 0; |
4be44fcd | 325 | struct acpi_ac *ac = NULL; |
1da177e4 | 326 | |
1da177e4 | 327 | |
98012849 GR |
328 | if (!device) |
329 | return -EINVAL; | |
cc8ef527 | 330 | |
36bcbec7 | 331 | ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL); |
1da177e4 | 332 | if (!ac) |
d550d98d | 333 | return -ENOMEM; |
1da177e4 | 334 | |
98012849 GR |
335 | ac->device = device; |
336 | strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME); | |
337 | strcpy(acpi_device_class(device), ACPI_AC_CLASS); | |
338 | device->driver_data = ac; | |
1da177e4 LT |
339 | |
340 | result = acpi_ac_get_state(ac); | |
341 | if (result) | |
342 | goto end; | |
343 | ||
98012849 | 344 | ac->charger.name = acpi_device_bid(device); |
e63f6e28 LT |
345 | #ifdef CONFIG_ACPI_PROCFS_POWER |
346 | result = acpi_ac_add_fs(ac); | |
347 | if (result) | |
348 | goto end; | |
349 | #endif | |
d5b4a3d0 AS |
350 | ac->charger.type = POWER_SUPPLY_TYPE_MAINS; |
351 | ac->charger.properties = ac_props; | |
352 | ac->charger.num_properties = ARRAY_SIZE(ac_props); | |
353 | ac->charger.get_property = get_ac_property; | |
98012849 | 354 | result = power_supply_register(&ac->device->dev, &ac->charger); |
f197ac13 LT |
355 | if (result) |
356 | goto end; | |
1da177e4 | 357 | |
4be44fcd | 358 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", |
98012849 | 359 | acpi_device_name(device), acpi_device_bid(device), |
4be44fcd | 360 | ac->state ? "on-line" : "off-line"); |
1da177e4 | 361 | |
4eee4f03 AM |
362 | ac->battery_nb.notifier_call = acpi_ac_battery_notify; |
363 | register_acpi_notifier(&ac->battery_nb); | |
ab0fd674 | 364 | end: |
e63f6e28 LT |
365 | if (result) { |
366 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
367 | acpi_ac_remove_fs(ac); | |
368 | #endif | |
1da177e4 | 369 | kfree(ac); |
e63f6e28 | 370 | } |
1da177e4 | 371 | |
0ab5bb64 | 372 | dmi_check_system(ac_dmi_table); |
d550d98d | 373 | return result; |
1da177e4 LT |
374 | } |
375 | ||
90692404 | 376 | #ifdef CONFIG_PM_SLEEP |
ccda7069 | 377 | static int acpi_ac_resume(struct device *dev) |
5bfeca31 AS |
378 | { |
379 | struct acpi_ac *ac; | |
380 | unsigned old_state; | |
ccda7069 RW |
381 | |
382 | if (!dev) | |
383 | return -EINVAL; | |
384 | ||
98012849 | 385 | ac = acpi_driver_data(to_acpi_device(dev)); |
ccda7069 | 386 | if (!ac) |
5bfeca31 | 387 | return -EINVAL; |
ccda7069 | 388 | |
5bfeca31 AS |
389 | old_state = ac->state; |
390 | if (acpi_ac_get_state(ac)) | |
391 | return 0; | |
392 | if (old_state != ac->state) | |
393 | kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE); | |
394 | return 0; | |
395 | } | |
06521c2e SK |
396 | #else |
397 | #define acpi_ac_resume NULL | |
90692404 | 398 | #endif |
5bfeca31 | 399 | |
98012849 | 400 | static int acpi_ac_remove(struct acpi_device *device) |
1da177e4 | 401 | { |
98012849 GR |
402 | struct acpi_ac *ac = NULL; |
403 | ||
1da177e4 | 404 | |
98012849 | 405 | if (!device || !acpi_driver_data(device)) |
d550d98d | 406 | return -EINVAL; |
1da177e4 | 407 | |
98012849 | 408 | ac = acpi_driver_data(device); |
1da177e4 | 409 | |
d5b4a3d0 AS |
410 | if (ac->charger.dev) |
411 | power_supply_unregister(&ac->charger); | |
4eee4f03 | 412 | unregister_acpi_notifier(&ac->battery_nb); |
cc8ef527 | 413 | |
e63f6e28 LT |
414 | #ifdef CONFIG_ACPI_PROCFS_POWER |
415 | acpi_ac_remove_fs(ac); | |
416 | #endif | |
417 | ||
1da177e4 LT |
418 | kfree(ac); |
419 | ||
d550d98d | 420 | return 0; |
1da177e4 LT |
421 | } |
422 | ||
4be44fcd | 423 | static int __init acpi_ac_init(void) |
1da177e4 | 424 | { |
3f86b832 | 425 | int result; |
1da177e4 | 426 | |
4d8316d5 PM |
427 | if (acpi_disabled) |
428 | return -ENODEV; | |
1da177e4 | 429 | |
e63f6e28 LT |
430 | #ifdef CONFIG_ACPI_PROCFS_POWER |
431 | acpi_ac_dir = acpi_lock_ac_dir(); | |
432 | if (!acpi_ac_dir) | |
433 | return -ENODEV; | |
434 | #endif | |
435 | ||
436 | ||
98012849 | 437 | result = acpi_bus_register_driver(&acpi_ac_driver); |
e63f6e28 LT |
438 | if (result < 0) { |
439 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
440 | acpi_unlock_ac_dir(acpi_ac_dir); | |
441 | #endif | |
d550d98d | 442 | return -ENODEV; |
e63f6e28 | 443 | } |
1da177e4 | 444 | |
d550d98d | 445 | return 0; |
1da177e4 LT |
446 | } |
447 | ||
4be44fcd | 448 | static void __exit acpi_ac_exit(void) |
1da177e4 | 449 | { |
98012849 | 450 | acpi_bus_unregister_driver(&acpi_ac_driver); |
e63f6e28 LT |
451 | #ifdef CONFIG_ACPI_PROCFS_POWER |
452 | acpi_unlock_ac_dir(acpi_ac_dir); | |
453 | #endif | |
1da177e4 | 454 | } |
1da177e4 LT |
455 | module_init(acpi_ac_init); |
456 | module_exit(acpi_ac_exit); |