Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
50a4da89 | 2 | * button.c - ACPI Button Driver |
1da177e4 LT |
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> | |
28 | #include <linux/init.h> | |
b34a8030 AS |
29 | #include <linux/types.h> |
30 | #include <linux/proc_fs.h> | |
31 | #include <linux/seq_file.h> | |
c0968f0e | 32 | #include <linux/input.h> |
5a0e3ad6 | 33 | #include <linux/slab.h> |
8b48463f | 34 | #include <linux/acpi.h> |
6270da6f | 35 | #include <acpi/button.h> |
1da177e4 | 36 | |
a192a958 LB |
37 | #define PREFIX "ACPI: " |
38 | ||
1da177e4 | 39 | #define ACPI_BUTTON_CLASS "button" |
b34a8030 AS |
40 | #define ACPI_BUTTON_FILE_INFO "info" |
41 | #define ACPI_BUTTON_FILE_STATE "state" | |
42 | #define ACPI_BUTTON_TYPE_UNKNOWN 0x00 | |
1da177e4 LT |
43 | #define ACPI_BUTTON_NOTIFY_STATUS 0x80 |
44 | ||
45 | #define ACPI_BUTTON_SUBCLASS_POWER "power" | |
4be44fcd | 46 | #define ACPI_BUTTON_HID_POWER "PNP0C0C" |
d68b597c | 47 | #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button" |
1da177e4 | 48 | #define ACPI_BUTTON_TYPE_POWER 0x01 |
1da177e4 LT |
49 | |
50 | #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep" | |
51 | #define ACPI_BUTTON_HID_SLEEP "PNP0C0E" | |
d68b597c | 52 | #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button" |
1da177e4 | 53 | #define ACPI_BUTTON_TYPE_SLEEP 0x03 |
1da177e4 LT |
54 | |
55 | #define ACPI_BUTTON_SUBCLASS_LID "lid" | |
56 | #define ACPI_BUTTON_HID_LID "PNP0C0D" | |
57 | #define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch" | |
58 | #define ACPI_BUTTON_TYPE_LID 0x05 | |
59 | ||
60 | #define _COMPONENT ACPI_BUTTON_COMPONENT | |
f52fd66d | 61 | ACPI_MODULE_NAME("button"); |
1da177e4 | 62 | |
c0968f0e | 63 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 64 | MODULE_DESCRIPTION("ACPI Button Driver"); |
1da177e4 LT |
65 | MODULE_LICENSE("GPL"); |
66 | ||
1ba90e3a TR |
67 | static const struct acpi_device_id button_device_ids[] = { |
68 | {ACPI_BUTTON_HID_LID, 0}, | |
69 | {ACPI_BUTTON_HID_SLEEP, 0}, | |
70 | {ACPI_BUTTON_HID_SLEEPF, 0}, | |
71 | {ACPI_BUTTON_HID_POWER, 0}, | |
72 | {ACPI_BUTTON_HID_POWERF, 0}, | |
73 | {"", 0}, | |
74 | }; | |
75 | MODULE_DEVICE_TABLE(acpi, button_device_ids); | |
76 | ||
4be44fcd | 77 | static int acpi_button_add(struct acpi_device *device); |
51fac838 | 78 | static int acpi_button_remove(struct acpi_device *device); |
373cfc36 | 79 | static void acpi_button_notify(struct acpi_device *device, u32 event); |
1da177e4 | 80 | |
90692404 | 81 | #ifdef CONFIG_PM_SLEEP |
1be532de | 82 | static int acpi_button_resume(struct device *dev); |
90692404 | 83 | #endif |
1be532de RW |
84 | static SIMPLE_DEV_PM_OPS(acpi_button_pm, NULL, acpi_button_resume); |
85 | ||
1da177e4 | 86 | static struct acpi_driver acpi_button_driver = { |
c2b6705b | 87 | .name = "button", |
4be44fcd | 88 | .class = ACPI_BUTTON_CLASS, |
1ba90e3a | 89 | .ids = button_device_ids, |
4be44fcd LB |
90 | .ops = { |
91 | .add = acpi_button_add, | |
92 | .remove = acpi_button_remove, | |
373cfc36 | 93 | .notify = acpi_button_notify, |
c0968f0e | 94 | }, |
1be532de | 95 | .drv.pm = &acpi_button_pm, |
1da177e4 LT |
96 | }; |
97 | ||
98 | struct acpi_button { | |
c0968f0e DT |
99 | unsigned int type; |
100 | struct input_dev *input; | |
101 | char phys[32]; /* for input device */ | |
4be44fcd | 102 | unsigned long pushed; |
c19f9a84 | 103 | bool wakeup_enabled; |
1da177e4 LT |
104 | }; |
105 | ||
7e12715e JB |
106 | static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier); |
107 | static struct acpi_device *lid_device; | |
108 | ||
b34a8030 AS |
109 | /* -------------------------------------------------------------------------- |
110 | FS Interface (/proc) | |
111 | -------------------------------------------------------------------------- */ | |
112 | ||
4be44fcd | 113 | static struct proc_dir_entry *acpi_button_dir; |
912b7427 | 114 | static struct proc_dir_entry *acpi_lid_dir; |
4be44fcd | 115 | |
b34a8030 AS |
116 | static int acpi_button_state_seq_show(struct seq_file *seq, void *offset) |
117 | { | |
106c19e7 | 118 | struct acpi_device *device = seq->private; |
4be44fcd | 119 | acpi_status status; |
27663c58 | 120 | unsigned long long state; |
b34a8030 | 121 | |
106c19e7 | 122 | status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state); |
c0968f0e DT |
123 | seq_printf(seq, "state: %s\n", |
124 | ACPI_FAILURE(status) ? "unsupported" : | |
125 | (state ? "open" : "closed")); | |
d550d98d | 126 | return 0; |
b34a8030 AS |
127 | } |
128 | ||
129 | static int acpi_button_state_open_fs(struct inode *inode, struct file *file) | |
130 | { | |
d9dda78b | 131 | return single_open(file, acpi_button_state_seq_show, PDE_DATA(inode)); |
b34a8030 AS |
132 | } |
133 | ||
912b7427 ZR |
134 | static const struct file_operations acpi_button_state_fops = { |
135 | .owner = THIS_MODULE, | |
136 | .open = acpi_button_state_open_fs, | |
137 | .read = seq_read, | |
138 | .llseek = seq_lseek, | |
139 | .release = single_release, | |
140 | }; | |
b34a8030 | 141 | |
4be44fcd | 142 | static int acpi_button_add_fs(struct acpi_device *device) |
b34a8030 | 143 | { |
1bce8113 | 144 | struct acpi_button *button = acpi_driver_data(device); |
4be44fcd | 145 | struct proc_dir_entry *entry = NULL; |
912b7427 | 146 | int ret = 0; |
b34a8030 | 147 | |
912b7427 ZR |
148 | /* procfs I/F for ACPI lid device only */ |
149 | if (button->type != ACPI_BUTTON_TYPE_LID) | |
150 | return 0; | |
151 | ||
152 | if (acpi_button_dir || acpi_lid_dir) { | |
153 | printk(KERN_ERR PREFIX "More than one Lid device found!\n"); | |
154 | return -EEXIST; | |
b34a8030 AS |
155 | } |
156 | ||
912b7427 ZR |
157 | /* create /proc/acpi/button */ |
158 | acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); | |
159 | if (!acpi_button_dir) | |
d550d98d | 160 | return -ENODEV; |
b34a8030 | 161 | |
912b7427 ZR |
162 | /* create /proc/acpi/button/lid */ |
163 | acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
164 | if (!acpi_lid_dir) { | |
165 | ret = -ENODEV; | |
166 | goto remove_button_dir; | |
167 | } | |
b34a8030 | 168 | |
912b7427 ZR |
169 | /* create /proc/acpi/button/lid/LID/ */ |
170 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir); | |
171 | if (!acpi_device_dir(device)) { | |
172 | ret = -ENODEV; | |
173 | goto remove_lid_dir; | |
174 | } | |
b34a8030 | 175 | |
912b7427 ZR |
176 | /* create /proc/acpi/button/lid/LID/state */ |
177 | entry = proc_create_data(ACPI_BUTTON_FILE_STATE, | |
178 | S_IRUGO, acpi_device_dir(device), | |
179 | &acpi_button_state_fops, device); | |
180 | if (!entry) { | |
181 | ret = -ENODEV; | |
182 | goto remove_dev_dir; | |
b34a8030 AS |
183 | } |
184 | ||
912b7427 ZR |
185 | done: |
186 | return ret; | |
187 | ||
188 | remove_dev_dir: | |
189 | remove_proc_entry(acpi_device_bid(device), | |
190 | acpi_lid_dir); | |
191 | acpi_device_dir(device) = NULL; | |
192 | remove_lid_dir: | |
193 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
194 | remove_button_dir: | |
195 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); | |
196 | goto done; | |
b34a8030 AS |
197 | } |
198 | ||
4be44fcd | 199 | static int acpi_button_remove_fs(struct acpi_device *device) |
b34a8030 | 200 | { |
c0968f0e | 201 | struct acpi_button *button = acpi_driver_data(device); |
b34a8030 | 202 | |
912b7427 ZR |
203 | if (button->type != ACPI_BUTTON_TYPE_LID) |
204 | return 0; | |
b34a8030 | 205 | |
912b7427 ZR |
206 | remove_proc_entry(ACPI_BUTTON_FILE_STATE, |
207 | acpi_device_dir(device)); | |
208 | remove_proc_entry(acpi_device_bid(device), | |
209 | acpi_lid_dir); | |
210 | acpi_device_dir(device) = NULL; | |
211 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
212 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); | |
b34a8030 | 213 | |
d550d98d | 214 | return 0; |
b34a8030 AS |
215 | } |
216 | ||
1da177e4 LT |
217 | /* -------------------------------------------------------------------------- |
218 | Driver Interface | |
219 | -------------------------------------------------------------------------- */ | |
7e12715e JB |
220 | int acpi_lid_notifier_register(struct notifier_block *nb) |
221 | { | |
222 | return blocking_notifier_chain_register(&acpi_lid_notifier, nb); | |
223 | } | |
224 | EXPORT_SYMBOL(acpi_lid_notifier_register); | |
225 | ||
226 | int acpi_lid_notifier_unregister(struct notifier_block *nb) | |
227 | { | |
228 | return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb); | |
229 | } | |
230 | EXPORT_SYMBOL(acpi_lid_notifier_unregister); | |
231 | ||
232 | int acpi_lid_open(void) | |
233 | { | |
234 | acpi_status status; | |
235 | unsigned long long state; | |
236 | ||
2c907b72 JB |
237 | if (!lid_device) |
238 | return -ENODEV; | |
239 | ||
7e12715e JB |
240 | status = acpi_evaluate_integer(lid_device->handle, "_LID", NULL, |
241 | &state); | |
242 | if (ACPI_FAILURE(status)) | |
243 | return -ENODEV; | |
244 | ||
245 | return !!state; | |
246 | } | |
247 | EXPORT_SYMBOL(acpi_lid_open); | |
248 | ||
106c19e7 | 249 | static int acpi_lid_send_state(struct acpi_device *device) |
23de5d9e | 250 | { |
106c19e7 | 251 | struct acpi_button *button = acpi_driver_data(device); |
27663c58 | 252 | unsigned long long state; |
23de5d9e | 253 | acpi_status status; |
7e12715e | 254 | int ret; |
23de5d9e | 255 | |
106c19e7 | 256 | status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state); |
23de5d9e AS |
257 | if (ACPI_FAILURE(status)) |
258 | return -ENODEV; | |
50a4da89 | 259 | |
23de5d9e AS |
260 | /* input layer checks if event is redundant */ |
261 | input_report_switch(button->input, SW_LID, !state); | |
df316e93 | 262 | input_sync(button->input); |
7e12715e | 263 | |
1f83511b RW |
264 | if (state) |
265 | pm_wakeup_event(&device->dev, 0); | |
266 | ||
7e12715e JB |
267 | ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device); |
268 | if (ret == NOTIFY_DONE) | |
269 | ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, | |
270 | device); | |
13c199c0 ZY |
271 | if (ret == NOTIFY_DONE || ret == NOTIFY_OK) { |
272 | /* | |
273 | * It is also regarded as success if the notifier_chain | |
274 | * returns NOTIFY_OK or NOTIFY_DONE. | |
275 | */ | |
276 | ret = 0; | |
277 | } | |
7e12715e | 278 | return ret; |
23de5d9e | 279 | } |
1da177e4 | 280 | |
373cfc36 | 281 | static void acpi_button_notify(struct acpi_device *device, u32 event) |
1da177e4 | 282 | { |
373cfc36 | 283 | struct acpi_button *button = acpi_driver_data(device); |
c0968f0e | 284 | struct input_dev *input; |
1da177e4 | 285 | |
1da177e4 | 286 | switch (event) { |
373cfc36 BH |
287 | case ACPI_FIXED_HARDWARE_EVENT: |
288 | event = ACPI_BUTTON_NOTIFY_STATUS; | |
289 | /* fall through */ | |
1da177e4 | 290 | case ACPI_BUTTON_NOTIFY_STATUS: |
c0968f0e | 291 | input = button->input; |
c0968f0e | 292 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
106c19e7 | 293 | acpi_lid_send_state(device); |
c0968f0e DT |
294 | } else { |
295 | int keycode = test_bit(KEY_SLEEP, input->keybit) ? | |
296 | KEY_SLEEP : KEY_POWER; | |
297 | ||
298 | input_report_key(input, keycode, 1); | |
299 | input_sync(input); | |
300 | input_report_key(input, keycode, 0); | |
df316e93 | 301 | input_sync(input); |
1f83511b RW |
302 | |
303 | pm_wakeup_event(&device->dev, 0); | |
c0968f0e | 304 | } |
1da177e4 LT |
305 | break; |
306 | default: | |
307 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 308 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
309 | break; |
310 | } | |
1da177e4 LT |
311 | } |
312 | ||
90692404 | 313 | #ifdef CONFIG_PM_SLEEP |
1be532de | 314 | static int acpi_button_resume(struct device *dev) |
23de5d9e | 315 | { |
1be532de | 316 | struct acpi_device *device = to_acpi_device(dev); |
1bce8113 | 317 | struct acpi_button *button = acpi_driver_data(device); |
50a4da89 | 318 | |
e2fb9754 | 319 | if (button->type == ACPI_BUTTON_TYPE_LID) |
106c19e7 | 320 | return acpi_lid_send_state(device); |
23de5d9e AS |
321 | return 0; |
322 | } | |
90692404 | 323 | #endif |
23de5d9e | 324 | |
c0968f0e DT |
325 | static int acpi_button_add(struct acpi_device *device) |
326 | { | |
c0968f0e DT |
327 | struct acpi_button *button; |
328 | struct input_dev *input; | |
620e112c TR |
329 | const char *hid = acpi_device_hid(device); |
330 | char *name, *class; | |
1bce8113 | 331 | int error; |
1da177e4 | 332 | |
c0968f0e | 333 | button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); |
1da177e4 | 334 | if (!button) |
d550d98d | 335 | return -ENOMEM; |
1da177e4 | 336 | |
db89b4f0 | 337 | device->driver_data = button; |
1da177e4 | 338 | |
c0968f0e DT |
339 | button->input = input = input_allocate_device(); |
340 | if (!input) { | |
341 | error = -ENOMEM; | |
342 | goto err_free_button; | |
343 | } | |
344 | ||
bf04a772 BH |
345 | name = acpi_device_name(device); |
346 | class = acpi_device_class(device); | |
347 | ||
d68b597c BH |
348 | if (!strcmp(hid, ACPI_BUTTON_HID_POWER) || |
349 | !strcmp(hid, ACPI_BUTTON_HID_POWERF)) { | |
1da177e4 | 350 | button->type = ACPI_BUTTON_TYPE_POWER; |
bf04a772 BH |
351 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER); |
352 | sprintf(class, "%s/%s", | |
1da177e4 | 353 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
d68b597c BH |
354 | } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) || |
355 | !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) { | |
1da177e4 | 356 | button->type = ACPI_BUTTON_TYPE_SLEEP; |
bf04a772 BH |
357 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP); |
358 | sprintf(class, "%s/%s", | |
1da177e4 | 359 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
bf04a772 | 360 | } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) { |
1da177e4 | 361 | button->type = ACPI_BUTTON_TYPE_LID; |
bf04a772 BH |
362 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID); |
363 | sprintf(class, "%s/%s", | |
1da177e4 | 364 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); |
4be44fcd | 365 | } else { |
bf04a772 | 366 | printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid); |
c0968f0e DT |
367 | error = -ENODEV; |
368 | goto err_free_input; | |
1da177e4 LT |
369 | } |
370 | ||
c0968f0e DT |
371 | error = acpi_button_add_fs(device); |
372 | if (error) | |
373 | goto err_free_input; | |
374 | ||
bf04a772 | 375 | snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid); |
c0968f0e | 376 | |
bf04a772 | 377 | input->name = name; |
c0968f0e DT |
378 | input->phys = button->phys; |
379 | input->id.bustype = BUS_HOST; | |
380 | input->id.product = button->type; | |
3b34e523 | 381 | input->dev.parent = &device->dev; |
b34a8030 | 382 | |
1da177e4 | 383 | switch (button->type) { |
c0968f0e | 384 | case ACPI_BUTTON_TYPE_POWER: |
763f527b | 385 | input_set_capability(input, EV_KEY, KEY_POWER); |
1da177e4 | 386 | break; |
c0968f0e DT |
387 | |
388 | case ACPI_BUTTON_TYPE_SLEEP: | |
763f527b | 389 | input_set_capability(input, EV_KEY, KEY_SLEEP); |
1da177e4 | 390 | break; |
c0968f0e DT |
391 | |
392 | case ACPI_BUTTON_TYPE_LID: | |
763f527b | 393 | input_set_capability(input, EV_SW, SW_LID); |
1da177e4 LT |
394 | break; |
395 | } | |
396 | ||
c0968f0e DT |
397 | error = input_register_device(input); |
398 | if (error) | |
373cfc36 | 399 | goto err_remove_fs; |
7e12715e | 400 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
106c19e7 | 401 | acpi_lid_send_state(device); |
7e12715e JB |
402 | /* |
403 | * This assumes there's only one lid device, or if there are | |
404 | * more we only care about the last one... | |
405 | */ | |
406 | lid_device = device; | |
407 | } | |
1da177e4 LT |
408 | |
409 | if (device->wakeup.flags.valid) { | |
410 | /* Button's GPE is run-wake GPE */ | |
4be44fcd | 411 | acpi_enable_gpe(device->wakeup.gpe_device, |
a44061aa | 412 | device->wakeup.gpe_number); |
c19f9a84 RW |
413 | if (!device_may_wakeup(&device->dev)) { |
414 | device_set_wakeup_enable(&device->dev, true); | |
415 | button->wakeup_enabled = true; | |
416 | } | |
1da177e4 LT |
417 | } |
418 | ||
bf04a772 | 419 | printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device)); |
c0968f0e | 420 | return 0; |
1da177e4 | 421 | |
c0968f0e DT |
422 | err_remove_fs: |
423 | acpi_button_remove_fs(device); | |
424 | err_free_input: | |
425 | input_free_device(input); | |
426 | err_free_button: | |
427 | kfree(button); | |
428 | return error; | |
1da177e4 LT |
429 | } |
430 | ||
51fac838 | 431 | static int acpi_button_remove(struct acpi_device *device) |
1da177e4 | 432 | { |
1bce8113 | 433 | struct acpi_button *button = acpi_driver_data(device); |
1da177e4 | 434 | |
9630bdd9 RW |
435 | if (device->wakeup.flags.valid) { |
436 | acpi_disable_gpe(device->wakeup.gpe_device, | |
a44061aa | 437 | device->wakeup.gpe_number); |
c19f9a84 RW |
438 | if (button->wakeup_enabled) |
439 | device_set_wakeup_enable(&device->dev, false); | |
9630bdd9 RW |
440 | } |
441 | ||
4be44fcd | 442 | acpi_button_remove_fs(device); |
c0968f0e | 443 | input_unregister_device(button->input); |
1da177e4 | 444 | kfree(button); |
d550d98d | 445 | return 0; |
1da177e4 LT |
446 | } |
447 | ||
466e78f7 | 448 | module_acpi_driver(acpi_button_driver); |