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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 | * | |
1da177e4 LT |
19 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
20 | */ | |
21 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
1da177e4 LT |
25 | #include <linux/init.h> |
26 | #include <linux/types.h> | |
0ab5bb64 LT |
27 | #include <linux/dmi.h> |
28 | #include <linux/delay.h> | |
e63f6e28 LT |
29 | #ifdef CONFIG_ACPI_PROCFS_POWER |
30 | #include <linux/proc_fs.h> | |
31 | #include <linux/seq_file.h> | |
32 | #endif | |
cc8ef527 | 33 | #include <linux/platform_device.h> |
d5b4a3d0 | 34 | #include <linux/power_supply.h> |
8b48463f | 35 | #include <linux/acpi.h> |
4eee4f03 | 36 | #include "battery.h" |
1da177e4 | 37 | |
a192a958 LB |
38 | #define PREFIX "ACPI: " |
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 | ||
e63f6e28 | 55 | |
98012849 GR |
56 | static int acpi_ac_add(struct acpi_device *device); |
57 | static int acpi_ac_remove(struct acpi_device *device); | |
58 | static void acpi_ac_notify(struct acpi_device *device, u32 event); | |
59 | ||
af3ec837 HG |
60 | struct acpi_ac_bl { |
61 | const char *hid; | |
62 | int hrv; | |
63 | }; | |
64 | ||
98012849 GR |
65 | static const struct acpi_device_id ac_device_ids[] = { |
66 | {"ACPI0003", 0}, | |
67 | {"", 0}, | |
68 | }; | |
69 | MODULE_DEVICE_TABLE(acpi, ac_device_ids); | |
70 | ||
af3ec837 HG |
71 | /* Lists of PMIC ACPI HIDs with an (often better) native charger driver */ |
72 | static const struct acpi_ac_bl acpi_ac_blacklist[] = { | |
73 | { "INT33F4", -1 }, /* X-Powers AXP288 PMIC */ | |
74 | { "INT34D3", 3 }, /* Intel Cherrytrail Whiskey Cove PMIC */ | |
75 | }; | |
76 | ||
98012849 GR |
77 | #ifdef CONFIG_PM_SLEEP |
78 | static int acpi_ac_resume(struct device *dev); | |
79 | #endif | |
80 | static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume); | |
81 | ||
e63f6e28 LT |
82 | #ifdef CONFIG_ACPI_PROCFS_POWER |
83 | extern struct proc_dir_entry *acpi_lock_ac_dir(void); | |
84 | extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir); | |
85 | static int acpi_ac_open_fs(struct inode *inode, struct file *file); | |
86 | #endif | |
87 | ||
88 | ||
0ab5bb64 LT |
89 | static int ac_sleep_before_get_state_ms; |
90 | ||
98012849 GR |
91 | static struct acpi_driver acpi_ac_driver = { |
92 | .name = "ac", | |
93 | .class = ACPI_AC_CLASS, | |
94 | .ids = ac_device_ids, | |
95 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, | |
96 | .ops = { | |
97 | .add = acpi_ac_add, | |
98 | .remove = acpi_ac_remove, | |
99 | .notify = acpi_ac_notify, | |
100 | }, | |
101 | .drv.pm = &acpi_ac_pm, | |
102 | }; | |
103 | ||
1da177e4 | 104 | struct acpi_ac { |
297d716f KK |
105 | struct power_supply *charger; |
106 | struct power_supply_desc charger_desc; | |
98012849 | 107 | struct acpi_device * device; |
27663c58 | 108 | unsigned long long state; |
4eee4f03 | 109 | struct notifier_block battery_nb; |
1da177e4 LT |
110 | }; |
111 | ||
297d716f | 112 | #define to_acpi_ac(x) power_supply_get_drvdata(x) |
d5b4a3d0 | 113 | |
e63f6e28 LT |
114 | #ifdef CONFIG_ACPI_PROCFS_POWER |
115 | static const struct file_operations acpi_ac_fops = { | |
116 | .owner = THIS_MODULE, | |
117 | .open = acpi_ac_open_fs, | |
118 | .read = seq_read, | |
119 | .llseek = seq_lseek, | |
120 | .release = single_release, | |
121 | }; | |
122 | #endif | |
123 | ||
1da177e4 LT |
124 | /* -------------------------------------------------------------------------- |
125 | AC Adapter Management | |
126 | -------------------------------------------------------------------------- */ | |
127 | ||
4be44fcd | 128 | static int acpi_ac_get_state(struct acpi_ac *ac) |
1da177e4 | 129 | { |
98012849 GR |
130 | acpi_status status = AE_OK; |
131 | ||
132 | if (!ac) | |
133 | return -EINVAL; | |
1da177e4 | 134 | |
98012849 | 135 | status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, |
cc8ef527 | 136 | &ac->state); |
1da177e4 | 137 | if (ACPI_FAILURE(status)) { |
cc8ef527 ZR |
138 | ACPI_EXCEPTION((AE_INFO, status, |
139 | "Error reading AC Adapter state")); | |
1da177e4 | 140 | ac->state = ACPI_AC_STATUS_UNKNOWN; |
d550d98d | 141 | return -ENODEV; |
1da177e4 | 142 | } |
4be44fcd | 143 | |
d550d98d | 144 | return 0; |
1da177e4 LT |
145 | } |
146 | ||
3151dbb0 ZR |
147 | /* -------------------------------------------------------------------------- |
148 | sysfs I/F | |
149 | -------------------------------------------------------------------------- */ | |
150 | static int get_ac_property(struct power_supply *psy, | |
151 | enum power_supply_property psp, | |
152 | union power_supply_propval *val) | |
153 | { | |
154 | struct acpi_ac *ac = to_acpi_ac(psy); | |
155 | ||
156 | if (!ac) | |
157 | return -ENODEV; | |
158 | ||
159 | if (acpi_ac_get_state(ac)) | |
160 | return -ENODEV; | |
161 | ||
162 | switch (psp) { | |
163 | case POWER_SUPPLY_PROP_ONLINE: | |
164 | val->intval = ac->state; | |
165 | break; | |
166 | default: | |
167 | return -EINVAL; | |
168 | } | |
169 | return 0; | |
170 | } | |
171 | ||
172 | static enum power_supply_property ac_props[] = { | |
173 | POWER_SUPPLY_PROP_ONLINE, | |
174 | }; | |
175 | ||
e63f6e28 LT |
176 | #ifdef CONFIG_ACPI_PROCFS_POWER |
177 | /* -------------------------------------------------------------------------- | |
178 | FS Interface (/proc) | |
179 | -------------------------------------------------------------------------- */ | |
180 | ||
181 | static struct proc_dir_entry *acpi_ac_dir; | |
182 | ||
183 | static int acpi_ac_seq_show(struct seq_file *seq, void *offset) | |
184 | { | |
185 | struct acpi_ac *ac = seq->private; | |
186 | ||
187 | ||
188 | if (!ac) | |
189 | return 0; | |
190 | ||
191 | if (acpi_ac_get_state(ac)) { | |
192 | seq_puts(seq, "ERROR: Unable to read AC Adapter state\n"); | |
193 | return 0; | |
194 | } | |
195 | ||
196 | seq_puts(seq, "state: "); | |
197 | switch (ac->state) { | |
198 | case ACPI_AC_STATUS_OFFLINE: | |
199 | seq_puts(seq, "off-line\n"); | |
200 | break; | |
201 | case ACPI_AC_STATUS_ONLINE: | |
202 | seq_puts(seq, "on-line\n"); | |
203 | break; | |
204 | default: | |
205 | seq_puts(seq, "unknown\n"); | |
206 | break; | |
207 | } | |
208 | ||
209 | return 0; | |
210 | } | |
211 | ||
212 | static int acpi_ac_open_fs(struct inode *inode, struct file *file) | |
213 | { | |
214 | return single_open(file, acpi_ac_seq_show, PDE_DATA(inode)); | |
215 | } | |
216 | ||
217 | static int acpi_ac_add_fs(struct acpi_ac *ac) | |
218 | { | |
219 | struct proc_dir_entry *entry = NULL; | |
220 | ||
221 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded," | |
222 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); | |
223 | if (!acpi_device_dir(ac->device)) { | |
224 | acpi_device_dir(ac->device) = | |
225 | proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir); | |
226 | if (!acpi_device_dir(ac->device)) | |
227 | return -ENODEV; | |
228 | } | |
229 | ||
230 | /* 'state' [R] */ | |
231 | entry = proc_create_data(ACPI_AC_FILE_STATE, | |
232 | S_IRUGO, acpi_device_dir(ac->device), | |
233 | &acpi_ac_fops, ac); | |
234 | if (!entry) | |
235 | return -ENODEV; | |
236 | return 0; | |
237 | } | |
238 | ||
239 | static int acpi_ac_remove_fs(struct acpi_ac *ac) | |
240 | { | |
241 | ||
242 | if (acpi_device_dir(ac->device)) { | |
243 | remove_proc_entry(ACPI_AC_FILE_STATE, | |
244 | acpi_device_dir(ac->device)); | |
245 | remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir); | |
246 | acpi_device_dir(ac->device) = NULL; | |
247 | } | |
248 | ||
249 | return 0; | |
250 | } | |
251 | #endif | |
252 | ||
1da177e4 LT |
253 | /* -------------------------------------------------------------------------- |
254 | Driver Model | |
255 | -------------------------------------------------------------------------- */ | |
256 | ||
98012849 | 257 | static void acpi_ac_notify(struct acpi_device *device, u32 event) |
1da177e4 | 258 | { |
98012849 | 259 | struct acpi_ac *ac = acpi_driver_data(device); |
1da177e4 LT |
260 | |
261 | if (!ac) | |
d550d98d | 262 | return; |
1da177e4 | 263 | |
1da177e4 | 264 | switch (event) { |
f163ff51 LB |
265 | default: |
266 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
267 | "Unsupported event [0x%x]\n", event)); | |
1be9c3a0 | 268 | /* fall through */ |
1da177e4 | 269 | case ACPI_AC_NOTIFY_STATUS: |
03d78252 CL |
270 | case ACPI_NOTIFY_BUS_CHECK: |
271 | case ACPI_NOTIFY_DEVICE_CHECK: | |
0ab5bb64 LT |
272 | /* |
273 | * A buggy BIOS may notify AC first and then sleep for | |
274 | * a specific time before doing actual operations in the | |
275 | * EC event handler (_Qxx). This will cause the AC state | |
276 | * reported by the ACPI event to be incorrect, so wait for a | |
277 | * specific time for the EC event handler to make progress. | |
278 | */ | |
279 | if (ac_sleep_before_get_state_ms > 0) | |
280 | msleep(ac_sleep_before_get_state_ms); | |
281 | ||
1da177e4 | 282 | acpi_ac_get_state(ac); |
98012849 GR |
283 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
284 | dev_name(&device->dev), event, | |
285 | (u32) ac->state); | |
286 | acpi_notifier_call_chain(device, event, (u32) ac->state); | |
297d716f | 287 | kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE); |
1da177e4 LT |
288 | } |
289 | ||
d550d98d | 290 | return; |
1da177e4 LT |
291 | } |
292 | ||
4eee4f03 AM |
293 | static int acpi_ac_battery_notify(struct notifier_block *nb, |
294 | unsigned long action, void *data) | |
295 | { | |
296 | struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb); | |
297 | struct acpi_bus_event *event = (struct acpi_bus_event *)data; | |
298 | ||
299 | /* | |
300 | * On HP Pavilion dv6-6179er AC status notifications aren't triggered | |
301 | * when adapter is plugged/unplugged. However, battery status | |
302 | * notifcations are triggered when battery starts charging or | |
303 | * discharging. Re-reading AC status triggers lost AC notifications, | |
304 | * if AC status has changed. | |
305 | */ | |
306 | if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 && | |
307 | event->type == ACPI_BATTERY_NOTIFY_STATUS) | |
308 | acpi_ac_get_state(ac); | |
309 | ||
310 | return NOTIFY_OK; | |
311 | } | |
312 | ||
0ab5bb64 LT |
313 | static int thinkpad_e530_quirk(const struct dmi_system_id *d) |
314 | { | |
315 | ac_sleep_before_get_state_ms = 1000; | |
316 | return 0; | |
317 | } | |
318 | ||
44f610cd | 319 | static const struct dmi_system_id ac_dmi_table[] = { |
0ab5bb64 | 320 | { |
d6e5d91a | 321 | /* Thinkpad e530 */ |
0ab5bb64 | 322 | .callback = thinkpad_e530_quirk, |
0ab5bb64 LT |
323 | .matches = { |
324 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
325 | DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"), | |
326 | }, | |
327 | }, | |
328 | {}, | |
329 | }; | |
330 | ||
98012849 | 331 | static int acpi_ac_add(struct acpi_device *device) |
1da177e4 | 332 | { |
297d716f | 333 | struct power_supply_config psy_cfg = {}; |
4be44fcd | 334 | int result = 0; |
4be44fcd | 335 | struct acpi_ac *ac = NULL; |
1da177e4 | 336 | |
1da177e4 | 337 | |
98012849 GR |
338 | if (!device) |
339 | return -EINVAL; | |
cc8ef527 | 340 | |
36bcbec7 | 341 | ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL); |
1da177e4 | 342 | if (!ac) |
d550d98d | 343 | return -ENOMEM; |
1da177e4 | 344 | |
98012849 GR |
345 | ac->device = device; |
346 | strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME); | |
347 | strcpy(acpi_device_class(device), ACPI_AC_CLASS); | |
348 | device->driver_data = ac; | |
1da177e4 LT |
349 | |
350 | result = acpi_ac_get_state(ac); | |
351 | if (result) | |
352 | goto end; | |
353 | ||
297d716f KK |
354 | psy_cfg.drv_data = ac; |
355 | ||
356 | ac->charger_desc.name = acpi_device_bid(device); | |
e63f6e28 LT |
357 | #ifdef CONFIG_ACPI_PROCFS_POWER |
358 | result = acpi_ac_add_fs(ac); | |
359 | if (result) | |
360 | goto end; | |
361 | #endif | |
297d716f KK |
362 | ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS; |
363 | ac->charger_desc.properties = ac_props; | |
364 | ac->charger_desc.num_properties = ARRAY_SIZE(ac_props); | |
365 | ac->charger_desc.get_property = get_ac_property; | |
366 | ac->charger = power_supply_register(&ac->device->dev, | |
367 | &ac->charger_desc, &psy_cfg); | |
368 | if (IS_ERR(ac->charger)) { | |
369 | result = PTR_ERR(ac->charger); | |
f197ac13 | 370 | goto end; |
297d716f | 371 | } |
1da177e4 | 372 | |
4be44fcd | 373 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", |
98012849 | 374 | acpi_device_name(device), acpi_device_bid(device), |
4be44fcd | 375 | ac->state ? "on-line" : "off-line"); |
1da177e4 | 376 | |
4eee4f03 AM |
377 | ac->battery_nb.notifier_call = acpi_ac_battery_notify; |
378 | register_acpi_notifier(&ac->battery_nb); | |
ab0fd674 | 379 | end: |
e63f6e28 LT |
380 | if (result) { |
381 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
382 | acpi_ac_remove_fs(ac); | |
383 | #endif | |
1da177e4 | 384 | kfree(ac); |
e63f6e28 | 385 | } |
1da177e4 | 386 | |
0ab5bb64 | 387 | dmi_check_system(ac_dmi_table); |
d550d98d | 388 | return result; |
1da177e4 LT |
389 | } |
390 | ||
90692404 | 391 | #ifdef CONFIG_PM_SLEEP |
ccda7069 | 392 | static int acpi_ac_resume(struct device *dev) |
5bfeca31 AS |
393 | { |
394 | struct acpi_ac *ac; | |
395 | unsigned old_state; | |
ccda7069 RW |
396 | |
397 | if (!dev) | |
398 | return -EINVAL; | |
399 | ||
98012849 | 400 | ac = acpi_driver_data(to_acpi_device(dev)); |
ccda7069 | 401 | if (!ac) |
5bfeca31 | 402 | return -EINVAL; |
ccda7069 | 403 | |
5bfeca31 AS |
404 | old_state = ac->state; |
405 | if (acpi_ac_get_state(ac)) | |
406 | return 0; | |
407 | if (old_state != ac->state) | |
297d716f | 408 | kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE); |
5bfeca31 AS |
409 | return 0; |
410 | } | |
06521c2e SK |
411 | #else |
412 | #define acpi_ac_resume NULL | |
90692404 | 413 | #endif |
5bfeca31 | 414 | |
98012849 | 415 | static int acpi_ac_remove(struct acpi_device *device) |
1da177e4 | 416 | { |
98012849 GR |
417 | struct acpi_ac *ac = NULL; |
418 | ||
1da177e4 | 419 | |
98012849 | 420 | if (!device || !acpi_driver_data(device)) |
d550d98d | 421 | return -EINVAL; |
1da177e4 | 422 | |
98012849 | 423 | ac = acpi_driver_data(device); |
1da177e4 | 424 | |
297d716f | 425 | power_supply_unregister(ac->charger); |
4eee4f03 | 426 | unregister_acpi_notifier(&ac->battery_nb); |
cc8ef527 | 427 | |
e63f6e28 LT |
428 | #ifdef CONFIG_ACPI_PROCFS_POWER |
429 | acpi_ac_remove_fs(ac); | |
430 | #endif | |
431 | ||
1da177e4 LT |
432 | kfree(ac); |
433 | ||
d550d98d | 434 | return 0; |
1da177e4 LT |
435 | } |
436 | ||
4be44fcd | 437 | static int __init acpi_ac_init(void) |
1da177e4 | 438 | { |
af3ec837 | 439 | unsigned int i; |
3f86b832 | 440 | int result; |
1da177e4 | 441 | |
4d8316d5 PM |
442 | if (acpi_disabled) |
443 | return -ENODEV; | |
1da177e4 | 444 | |
af3ec837 HG |
445 | for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++) |
446 | if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1", | |
447 | acpi_ac_blacklist[i].hrv)) { | |
448 | pr_info(PREFIX "AC: found native %s PMIC, not loading\n", | |
449 | acpi_ac_blacklist[i].hid); | |
450 | return -ENODEV; | |
451 | } | |
452 | ||
e63f6e28 LT |
453 | #ifdef CONFIG_ACPI_PROCFS_POWER |
454 | acpi_ac_dir = acpi_lock_ac_dir(); | |
455 | if (!acpi_ac_dir) | |
456 | return -ENODEV; | |
457 | #endif | |
458 | ||
459 | ||
98012849 | 460 | result = acpi_bus_register_driver(&acpi_ac_driver); |
e63f6e28 LT |
461 | if (result < 0) { |
462 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
463 | acpi_unlock_ac_dir(acpi_ac_dir); | |
464 | #endif | |
d550d98d | 465 | return -ENODEV; |
e63f6e28 | 466 | } |
1da177e4 | 467 | |
d550d98d | 468 | return 0; |
1da177e4 LT |
469 | } |
470 | ||
4be44fcd | 471 | static void __exit acpi_ac_exit(void) |
1da177e4 | 472 | { |
98012849 | 473 | acpi_bus_unregister_driver(&acpi_ac_driver); |
e63f6e28 LT |
474 | #ifdef CONFIG_ACPI_PROCFS_POWER |
475 | acpi_unlock_ac_dir(acpi_ac_dir); | |
476 | #endif | |
1da177e4 | 477 | } |
1da177e4 LT |
478 | module_init(acpi_ac_init); |
479 | module_exit(acpi_ac_exit); |