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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $) | |
4 | * | |
5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
1da177e4 LT |
7 | */ |
8 | ||
9 | #include <linux/kernel.h> | |
10 | #include <linux/module.h> | |
5a0e3ad6 | 11 | #include <linux/slab.h> |
1da177e4 LT |
12 | #include <linux/init.h> |
13 | #include <linux/types.h> | |
0ab5bb64 LT |
14 | #include <linux/dmi.h> |
15 | #include <linux/delay.h> | |
e63f6e28 LT |
16 | #ifdef CONFIG_ACPI_PROCFS_POWER |
17 | #include <linux/proc_fs.h> | |
18 | #include <linux/seq_file.h> | |
19 | #endif | |
cc8ef527 | 20 | #include <linux/platform_device.h> |
d5b4a3d0 | 21 | #include <linux/power_supply.h> |
8b48463f | 22 | #include <linux/acpi.h> |
fa93854f | 23 | #include <acpi/battery.h> |
1da177e4 | 24 | |
a192a958 LB |
25 | #define PREFIX "ACPI: " |
26 | ||
1da177e4 | 27 | #define ACPI_AC_CLASS "ac_adapter" |
1da177e4 LT |
28 | #define ACPI_AC_DEVICE_NAME "AC Adapter" |
29 | #define ACPI_AC_FILE_STATE "state" | |
30 | #define ACPI_AC_NOTIFY_STATUS 0x80 | |
31 | #define ACPI_AC_STATUS_OFFLINE 0x00 | |
32 | #define ACPI_AC_STATUS_ONLINE 0x01 | |
33 | #define ACPI_AC_STATUS_UNKNOWN 0xFF | |
34 | ||
35 | #define _COMPONENT ACPI_AC_COMPONENT | |
f52fd66d | 36 | ACPI_MODULE_NAME("ac"); |
1da177e4 | 37 | |
f52fd66d | 38 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 39 | MODULE_DESCRIPTION("ACPI AC Adapter Driver"); |
1da177e4 LT |
40 | MODULE_LICENSE("GPL"); |
41 | ||
e63f6e28 | 42 | |
98012849 GR |
43 | static int acpi_ac_add(struct acpi_device *device); |
44 | static int acpi_ac_remove(struct acpi_device *device); | |
45 | static void acpi_ac_notify(struct acpi_device *device, u32 event); | |
46 | ||
af3ec837 HG |
47 | struct acpi_ac_bl { |
48 | const char *hid; | |
49 | int hrv; | |
50 | }; | |
51 | ||
98012849 GR |
52 | static const struct acpi_device_id ac_device_ids[] = { |
53 | {"ACPI0003", 0}, | |
54 | {"", 0}, | |
55 | }; | |
56 | MODULE_DEVICE_TABLE(acpi, ac_device_ids); | |
57 | ||
af3ec837 HG |
58 | /* Lists of PMIC ACPI HIDs with an (often better) native charger driver */ |
59 | static const struct acpi_ac_bl acpi_ac_blacklist[] = { | |
60 | { "INT33F4", -1 }, /* X-Powers AXP288 PMIC */ | |
61 | { "INT34D3", 3 }, /* Intel Cherrytrail Whiskey Cove PMIC */ | |
62 | }; | |
63 | ||
98012849 GR |
64 | #ifdef CONFIG_PM_SLEEP |
65 | static int acpi_ac_resume(struct device *dev); | |
66 | #endif | |
67 | static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume); | |
68 | ||
e63f6e28 LT |
69 | #ifdef CONFIG_ACPI_PROCFS_POWER |
70 | extern struct proc_dir_entry *acpi_lock_ac_dir(void); | |
71 | extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir); | |
e63f6e28 LT |
72 | #endif |
73 | ||
74 | ||
0ab5bb64 | 75 | static int ac_sleep_before_get_state_ms; |
91ea5b1d | 76 | static int ac_check_pmic = 1; |
0ab5bb64 | 77 | |
98012849 GR |
78 | static struct acpi_driver acpi_ac_driver = { |
79 | .name = "ac", | |
80 | .class = ACPI_AC_CLASS, | |
81 | .ids = ac_device_ids, | |
82 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, | |
83 | .ops = { | |
84 | .add = acpi_ac_add, | |
85 | .remove = acpi_ac_remove, | |
86 | .notify = acpi_ac_notify, | |
87 | }, | |
88 | .drv.pm = &acpi_ac_pm, | |
89 | }; | |
90 | ||
1da177e4 | 91 | struct acpi_ac { |
297d716f KK |
92 | struct power_supply *charger; |
93 | struct power_supply_desc charger_desc; | |
98012849 | 94 | struct acpi_device * device; |
27663c58 | 95 | unsigned long long state; |
4eee4f03 | 96 | struct notifier_block battery_nb; |
1da177e4 LT |
97 | }; |
98 | ||
297d716f | 99 | #define to_acpi_ac(x) power_supply_get_drvdata(x) |
d5b4a3d0 | 100 | |
1da177e4 LT |
101 | /* -------------------------------------------------------------------------- |
102 | AC Adapter Management | |
103 | -------------------------------------------------------------------------- */ | |
104 | ||
4be44fcd | 105 | static int acpi_ac_get_state(struct acpi_ac *ac) |
1da177e4 | 106 | { |
98012849 GR |
107 | acpi_status status = AE_OK; |
108 | ||
109 | if (!ac) | |
110 | return -EINVAL; | |
1da177e4 | 111 | |
98012849 | 112 | status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, |
cc8ef527 | 113 | &ac->state); |
1da177e4 | 114 | if (ACPI_FAILURE(status)) { |
cc8ef527 ZR |
115 | ACPI_EXCEPTION((AE_INFO, status, |
116 | "Error reading AC Adapter state")); | |
1da177e4 | 117 | ac->state = ACPI_AC_STATUS_UNKNOWN; |
d550d98d | 118 | return -ENODEV; |
1da177e4 | 119 | } |
4be44fcd | 120 | |
d550d98d | 121 | return 0; |
1da177e4 LT |
122 | } |
123 | ||
3151dbb0 ZR |
124 | /* -------------------------------------------------------------------------- |
125 | sysfs I/F | |
126 | -------------------------------------------------------------------------- */ | |
127 | static int get_ac_property(struct power_supply *psy, | |
128 | enum power_supply_property psp, | |
129 | union power_supply_propval *val) | |
130 | { | |
131 | struct acpi_ac *ac = to_acpi_ac(psy); | |
132 | ||
133 | if (!ac) | |
134 | return -ENODEV; | |
135 | ||
136 | if (acpi_ac_get_state(ac)) | |
137 | return -ENODEV; | |
138 | ||
139 | switch (psp) { | |
140 | case POWER_SUPPLY_PROP_ONLINE: | |
141 | val->intval = ac->state; | |
142 | break; | |
143 | default: | |
144 | return -EINVAL; | |
145 | } | |
146 | return 0; | |
147 | } | |
148 | ||
149 | static enum power_supply_property ac_props[] = { | |
150 | POWER_SUPPLY_PROP_ONLINE, | |
151 | }; | |
152 | ||
e63f6e28 LT |
153 | #ifdef CONFIG_ACPI_PROCFS_POWER |
154 | /* -------------------------------------------------------------------------- | |
155 | FS Interface (/proc) | |
156 | -------------------------------------------------------------------------- */ | |
157 | ||
158 | static struct proc_dir_entry *acpi_ac_dir; | |
159 | ||
160 | static int acpi_ac_seq_show(struct seq_file *seq, void *offset) | |
161 | { | |
162 | struct acpi_ac *ac = seq->private; | |
163 | ||
164 | ||
165 | if (!ac) | |
166 | return 0; | |
167 | ||
168 | if (acpi_ac_get_state(ac)) { | |
169 | seq_puts(seq, "ERROR: Unable to read AC Adapter state\n"); | |
170 | return 0; | |
171 | } | |
172 | ||
173 | seq_puts(seq, "state: "); | |
174 | switch (ac->state) { | |
175 | case ACPI_AC_STATUS_OFFLINE: | |
176 | seq_puts(seq, "off-line\n"); | |
177 | break; | |
178 | case ACPI_AC_STATUS_ONLINE: | |
179 | seq_puts(seq, "on-line\n"); | |
180 | break; | |
181 | default: | |
182 | seq_puts(seq, "unknown\n"); | |
183 | break; | |
184 | } | |
185 | ||
186 | return 0; | |
187 | } | |
188 | ||
e63f6e28 LT |
189 | static int acpi_ac_add_fs(struct acpi_ac *ac) |
190 | { | |
191 | struct proc_dir_entry *entry = NULL; | |
192 | ||
193 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded," | |
194 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); | |
195 | if (!acpi_device_dir(ac->device)) { | |
196 | acpi_device_dir(ac->device) = | |
197 | proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir); | |
198 | if (!acpi_device_dir(ac->device)) | |
199 | return -ENODEV; | |
200 | } | |
201 | ||
202 | /* 'state' [R] */ | |
3f3942ac CH |
203 | entry = proc_create_single_data(ACPI_AC_FILE_STATE, S_IRUGO, |
204 | acpi_device_dir(ac->device), acpi_ac_seq_show, ac); | |
e63f6e28 LT |
205 | if (!entry) |
206 | return -ENODEV; | |
207 | return 0; | |
208 | } | |
209 | ||
210 | static int acpi_ac_remove_fs(struct acpi_ac *ac) | |
211 | { | |
212 | ||
213 | if (acpi_device_dir(ac->device)) { | |
214 | remove_proc_entry(ACPI_AC_FILE_STATE, | |
215 | acpi_device_dir(ac->device)); | |
216 | remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir); | |
217 | acpi_device_dir(ac->device) = NULL; | |
218 | } | |
219 | ||
220 | return 0; | |
221 | } | |
222 | #endif | |
223 | ||
1da177e4 LT |
224 | /* -------------------------------------------------------------------------- |
225 | Driver Model | |
226 | -------------------------------------------------------------------------- */ | |
227 | ||
98012849 | 228 | static void acpi_ac_notify(struct acpi_device *device, u32 event) |
1da177e4 | 229 | { |
98012849 | 230 | struct acpi_ac *ac = acpi_driver_data(device); |
1da177e4 LT |
231 | |
232 | if (!ac) | |
d550d98d | 233 | return; |
1da177e4 | 234 | |
1da177e4 | 235 | switch (event) { |
f163ff51 LB |
236 | default: |
237 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
238 | "Unsupported event [0x%x]\n", event)); | |
1be9c3a0 | 239 | /* fall through */ |
1da177e4 | 240 | case ACPI_AC_NOTIFY_STATUS: |
03d78252 CL |
241 | case ACPI_NOTIFY_BUS_CHECK: |
242 | case ACPI_NOTIFY_DEVICE_CHECK: | |
0ab5bb64 LT |
243 | /* |
244 | * A buggy BIOS may notify AC first and then sleep for | |
245 | * a specific time before doing actual operations in the | |
246 | * EC event handler (_Qxx). This will cause the AC state | |
247 | * reported by the ACPI event to be incorrect, so wait for a | |
248 | * specific time for the EC event handler to make progress. | |
249 | */ | |
250 | if (ac_sleep_before_get_state_ms > 0) | |
251 | msleep(ac_sleep_before_get_state_ms); | |
252 | ||
1da177e4 | 253 | acpi_ac_get_state(ac); |
98012849 GR |
254 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
255 | dev_name(&device->dev), event, | |
256 | (u32) ac->state); | |
257 | acpi_notifier_call_chain(device, event, (u32) ac->state); | |
297d716f | 258 | kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE); |
1da177e4 LT |
259 | } |
260 | ||
d550d98d | 261 | return; |
1da177e4 LT |
262 | } |
263 | ||
4eee4f03 AM |
264 | static int acpi_ac_battery_notify(struct notifier_block *nb, |
265 | unsigned long action, void *data) | |
266 | { | |
267 | struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb); | |
268 | struct acpi_bus_event *event = (struct acpi_bus_event *)data; | |
269 | ||
270 | /* | |
271 | * On HP Pavilion dv6-6179er AC status notifications aren't triggered | |
272 | * when adapter is plugged/unplugged. However, battery status | |
273 | * notifcations are triggered when battery starts charging or | |
274 | * discharging. Re-reading AC status triggers lost AC notifications, | |
275 | * if AC status has changed. | |
276 | */ | |
277 | if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 && | |
278 | event->type == ACPI_BATTERY_NOTIFY_STATUS) | |
279 | acpi_ac_get_state(ac); | |
280 | ||
281 | return NOTIFY_OK; | |
282 | } | |
283 | ||
91ea5b1d | 284 | static int __init thinkpad_e530_quirk(const struct dmi_system_id *d) |
0ab5bb64 LT |
285 | { |
286 | ac_sleep_before_get_state_ms = 1000; | |
287 | return 0; | |
288 | } | |
289 | ||
91ea5b1d CC |
290 | static int __init ac_do_not_check_pmic_quirk(const struct dmi_system_id *d) |
291 | { | |
292 | ac_check_pmic = 0; | |
293 | return 0; | |
294 | } | |
295 | ||
296 | static const struct dmi_system_id ac_dmi_table[] __initconst = { | |
0ab5bb64 | 297 | { |
6605e342 | 298 | /* Thinkpad e530 */ |
0ab5bb64 | 299 | .callback = thinkpad_e530_quirk, |
0ab5bb64 LT |
300 | .matches = { |
301 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
302 | DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"), | |
303 | }, | |
304 | }, | |
91ea5b1d CC |
305 | { |
306 | /* ECS EF20EA */ | |
307 | .callback = ac_do_not_check_pmic_quirk, | |
308 | .matches = { | |
309 | DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"), | |
310 | }, | |
311 | }, | |
312 | { | |
313 | /* Lenovo Ideapad Miix 320 */ | |
314 | .callback = ac_do_not_check_pmic_quirk, | |
315 | .matches = { | |
316 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
317 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "80XF"), | |
318 | DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"), | |
319 | }, | |
320 | }, | |
0ab5bb64 LT |
321 | {}, |
322 | }; | |
323 | ||
98012849 | 324 | static int acpi_ac_add(struct acpi_device *device) |
1da177e4 | 325 | { |
297d716f | 326 | struct power_supply_config psy_cfg = {}; |
4be44fcd | 327 | int result = 0; |
4be44fcd | 328 | struct acpi_ac *ac = NULL; |
1da177e4 | 329 | |
1da177e4 | 330 | |
98012849 GR |
331 | if (!device) |
332 | return -EINVAL; | |
cc8ef527 | 333 | |
36bcbec7 | 334 | ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL); |
1da177e4 | 335 | if (!ac) |
d550d98d | 336 | return -ENOMEM; |
1da177e4 | 337 | |
98012849 GR |
338 | ac->device = device; |
339 | strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME); | |
340 | strcpy(acpi_device_class(device), ACPI_AC_CLASS); | |
341 | device->driver_data = ac; | |
1da177e4 LT |
342 | |
343 | result = acpi_ac_get_state(ac); | |
344 | if (result) | |
345 | goto end; | |
346 | ||
297d716f KK |
347 | psy_cfg.drv_data = ac; |
348 | ||
349 | ac->charger_desc.name = acpi_device_bid(device); | |
e63f6e28 LT |
350 | #ifdef CONFIG_ACPI_PROCFS_POWER |
351 | result = acpi_ac_add_fs(ac); | |
352 | if (result) | |
353 | goto end; | |
354 | #endif | |
297d716f KK |
355 | ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS; |
356 | ac->charger_desc.properties = ac_props; | |
357 | ac->charger_desc.num_properties = ARRAY_SIZE(ac_props); | |
358 | ac->charger_desc.get_property = get_ac_property; | |
359 | ac->charger = power_supply_register(&ac->device->dev, | |
360 | &ac->charger_desc, &psy_cfg); | |
361 | if (IS_ERR(ac->charger)) { | |
362 | result = PTR_ERR(ac->charger); | |
f197ac13 | 363 | goto end; |
297d716f | 364 | } |
1da177e4 | 365 | |
4be44fcd | 366 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", |
98012849 | 367 | acpi_device_name(device), acpi_device_bid(device), |
4be44fcd | 368 | ac->state ? "on-line" : "off-line"); |
1da177e4 | 369 | |
4eee4f03 AM |
370 | ac->battery_nb.notifier_call = acpi_ac_battery_notify; |
371 | register_acpi_notifier(&ac->battery_nb); | |
ab0fd674 | 372 | end: |
e63f6e28 LT |
373 | if (result) { |
374 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
375 | acpi_ac_remove_fs(ac); | |
376 | #endif | |
1da177e4 | 377 | kfree(ac); |
e63f6e28 | 378 | } |
1da177e4 | 379 | |
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 | { |
af3ec837 | 431 | unsigned int i; |
3f86b832 | 432 | int result; |
1da177e4 | 433 | |
4d8316d5 PM |
434 | if (acpi_disabled) |
435 | return -ENODEV; | |
1da177e4 | 436 | |
91ea5b1d CC |
437 | dmi_check_system(ac_dmi_table); |
438 | ||
439 | if (ac_check_pmic) { | |
440 | for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++) | |
441 | if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1", | |
442 | acpi_ac_blacklist[i].hrv)) { | |
443 | pr_info(PREFIX "AC: found native %s PMIC, not loading\n", | |
444 | acpi_ac_blacklist[i].hid); | |
445 | return -ENODEV; | |
446 | } | |
447 | } | |
af3ec837 | 448 | |
e63f6e28 LT |
449 | #ifdef CONFIG_ACPI_PROCFS_POWER |
450 | acpi_ac_dir = acpi_lock_ac_dir(); | |
451 | if (!acpi_ac_dir) | |
452 | return -ENODEV; | |
453 | #endif | |
454 | ||
455 | ||
98012849 | 456 | result = acpi_bus_register_driver(&acpi_ac_driver); |
e63f6e28 LT |
457 | if (result < 0) { |
458 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
459 | acpi_unlock_ac_dir(acpi_ac_dir); | |
460 | #endif | |
d550d98d | 461 | return -ENODEV; |
e63f6e28 | 462 | } |
1da177e4 | 463 | |
d550d98d | 464 | return 0; |
1da177e4 LT |
465 | } |
466 | ||
4be44fcd | 467 | static void __exit acpi_ac_exit(void) |
1da177e4 | 468 | { |
98012849 | 469 | acpi_bus_unregister_driver(&acpi_ac_driver); |
e63f6e28 LT |
470 | #ifdef CONFIG_ACPI_PROCFS_POWER |
471 | acpi_unlock_ac_dir(acpi_ac_dir); | |
472 | #endif | |
1da177e4 | 473 | } |
1da177e4 LT |
474 | module_init(acpi_ac_init); |
475 | module_exit(acpi_ac_exit); |