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> |
1da177e4 LT |
33 | #include <acpi/acpi_bus.h> |
34 | #include <acpi/acpi_drivers.h> | |
35 | ||
a192a958 LB |
36 | #define PREFIX "ACPI: " |
37 | ||
1da177e4 | 38 | #define ACPI_BUTTON_CLASS "button" |
b34a8030 AS |
39 | #define ACPI_BUTTON_FILE_INFO "info" |
40 | #define ACPI_BUTTON_FILE_STATE "state" | |
41 | #define ACPI_BUTTON_TYPE_UNKNOWN 0x00 | |
1da177e4 LT |
42 | #define ACPI_BUTTON_NOTIFY_STATUS 0x80 |
43 | ||
44 | #define ACPI_BUTTON_SUBCLASS_POWER "power" | |
4be44fcd | 45 | #define ACPI_BUTTON_HID_POWER "PNP0C0C" |
d68b597c | 46 | #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button" |
1da177e4 | 47 | #define ACPI_BUTTON_TYPE_POWER 0x01 |
1da177e4 LT |
48 | |
49 | #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep" | |
50 | #define ACPI_BUTTON_HID_SLEEP "PNP0C0E" | |
d68b597c | 51 | #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button" |
1da177e4 | 52 | #define ACPI_BUTTON_TYPE_SLEEP 0x03 |
1da177e4 LT |
53 | |
54 | #define ACPI_BUTTON_SUBCLASS_LID "lid" | |
55 | #define ACPI_BUTTON_HID_LID "PNP0C0D" | |
56 | #define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch" | |
57 | #define ACPI_BUTTON_TYPE_LID 0x05 | |
58 | ||
59 | #define _COMPONENT ACPI_BUTTON_COMPONENT | |
f52fd66d | 60 | ACPI_MODULE_NAME("button"); |
1da177e4 | 61 | |
c0968f0e | 62 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 63 | MODULE_DESCRIPTION("ACPI Button Driver"); |
1da177e4 LT |
64 | MODULE_LICENSE("GPL"); |
65 | ||
1ba90e3a TR |
66 | static const struct acpi_device_id button_device_ids[] = { |
67 | {ACPI_BUTTON_HID_LID, 0}, | |
68 | {ACPI_BUTTON_HID_SLEEP, 0}, | |
69 | {ACPI_BUTTON_HID_SLEEPF, 0}, | |
70 | {ACPI_BUTTON_HID_POWER, 0}, | |
71 | {ACPI_BUTTON_HID_POWERF, 0}, | |
72 | {"", 0}, | |
73 | }; | |
74 | MODULE_DEVICE_TABLE(acpi, button_device_ids); | |
75 | ||
4be44fcd LB |
76 | static int acpi_button_add(struct acpi_device *device); |
77 | static int acpi_button_remove(struct acpi_device *device, int type); | |
23de5d9e | 78 | static int acpi_button_resume(struct acpi_device *device); |
373cfc36 | 79 | static void acpi_button_notify(struct acpi_device *device, u32 event); |
b34a8030 AS |
80 | static int acpi_button_info_open_fs(struct inode *inode, struct file *file); |
81 | static int acpi_button_state_open_fs(struct inode *inode, struct file *file); | |
1da177e4 LT |
82 | |
83 | static struct acpi_driver acpi_button_driver = { | |
c2b6705b | 84 | .name = "button", |
4be44fcd | 85 | .class = ACPI_BUTTON_CLASS, |
1ba90e3a | 86 | .ids = button_device_ids, |
4be44fcd LB |
87 | .ops = { |
88 | .add = acpi_button_add, | |
23de5d9e | 89 | .resume = acpi_button_resume, |
4be44fcd | 90 | .remove = acpi_button_remove, |
373cfc36 | 91 | .notify = acpi_button_notify, |
c0968f0e | 92 | }, |
1da177e4 LT |
93 | }; |
94 | ||
95 | struct acpi_button { | |
c0968f0e DT |
96 | unsigned int type; |
97 | struct input_dev *input; | |
98 | char phys[32]; /* for input device */ | |
4be44fcd | 99 | unsigned long pushed; |
1da177e4 LT |
100 | }; |
101 | ||
d7508032 | 102 | static const struct file_operations acpi_button_info_fops = { |
cf7acfab | 103 | .owner = THIS_MODULE, |
4be44fcd LB |
104 | .open = acpi_button_info_open_fs, |
105 | .read = seq_read, | |
106 | .llseek = seq_lseek, | |
107 | .release = single_release, | |
b34a8030 AS |
108 | }; |
109 | ||
d7508032 | 110 | static const struct file_operations acpi_button_state_fops = { |
cf7acfab | 111 | .owner = THIS_MODULE, |
4be44fcd LB |
112 | .open = acpi_button_state_open_fs, |
113 | .read = seq_read, | |
114 | .llseek = seq_lseek, | |
115 | .release = single_release, | |
b34a8030 | 116 | }; |
4be44fcd | 117 | |
b34a8030 AS |
118 | /* -------------------------------------------------------------------------- |
119 | FS Interface (/proc) | |
120 | -------------------------------------------------------------------------- */ | |
121 | ||
4be44fcd | 122 | static struct proc_dir_entry *acpi_button_dir; |
b34a8030 AS |
123 | |
124 | static int acpi_button_info_seq_show(struct seq_file *seq, void *offset) | |
125 | { | |
106c19e7 | 126 | struct acpi_device *device = seq->private; |
b34a8030 | 127 | |
4be44fcd | 128 | seq_printf(seq, "type: %s\n", |
106c19e7 | 129 | acpi_device_name(device)); |
d550d98d | 130 | return 0; |
b34a8030 AS |
131 | } |
132 | ||
133 | static int acpi_button_info_open_fs(struct inode *inode, struct file *file) | |
134 | { | |
135 | return single_open(file, acpi_button_info_seq_show, PDE(inode)->data); | |
136 | } | |
4be44fcd | 137 | |
b34a8030 AS |
138 | static int acpi_button_state_seq_show(struct seq_file *seq, void *offset) |
139 | { | |
106c19e7 | 140 | struct acpi_device *device = seq->private; |
4be44fcd | 141 | acpi_status status; |
27663c58 | 142 | unsigned long long state; |
b34a8030 | 143 | |
106c19e7 | 144 | status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state); |
c0968f0e DT |
145 | seq_printf(seq, "state: %s\n", |
146 | ACPI_FAILURE(status) ? "unsupported" : | |
147 | (state ? "open" : "closed")); | |
d550d98d | 148 | return 0; |
b34a8030 AS |
149 | } |
150 | ||
151 | static int acpi_button_state_open_fs(struct inode *inode, struct file *file) | |
152 | { | |
153 | return single_open(file, acpi_button_state_seq_show, PDE(inode)->data); | |
154 | } | |
155 | ||
156 | static struct proc_dir_entry *acpi_power_dir; | |
157 | static struct proc_dir_entry *acpi_sleep_dir; | |
158 | static struct proc_dir_entry *acpi_lid_dir; | |
159 | ||
4be44fcd | 160 | static int acpi_button_add_fs(struct acpi_device *device) |
b34a8030 | 161 | { |
1bce8113 | 162 | struct acpi_button *button = acpi_driver_data(device); |
4be44fcd | 163 | struct proc_dir_entry *entry = NULL; |
b34a8030 AS |
164 | |
165 | switch (button->type) { | |
166 | case ACPI_BUTTON_TYPE_POWER: | |
b34a8030 | 167 | if (!acpi_power_dir) |
4be44fcd LB |
168 | acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER, |
169 | acpi_button_dir); | |
b34a8030 AS |
170 | entry = acpi_power_dir; |
171 | break; | |
172 | case ACPI_BUTTON_TYPE_SLEEP: | |
b34a8030 | 173 | if (!acpi_sleep_dir) |
4be44fcd LB |
174 | acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP, |
175 | acpi_button_dir); | |
b34a8030 AS |
176 | entry = acpi_sleep_dir; |
177 | break; | |
178 | case ACPI_BUTTON_TYPE_LID: | |
179 | if (!acpi_lid_dir) | |
4be44fcd LB |
180 | acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, |
181 | acpi_button_dir); | |
b34a8030 AS |
182 | entry = acpi_lid_dir; |
183 | break; | |
184 | } | |
185 | ||
186 | if (!entry) | |
d550d98d | 187 | return -ENODEV; |
b34a8030 AS |
188 | |
189 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry); | |
190 | if (!acpi_device_dir(device)) | |
d550d98d | 191 | return -ENODEV; |
b34a8030 AS |
192 | |
193 | /* 'info' [R] */ | |
cf7acfab DL |
194 | entry = proc_create_data(ACPI_BUTTON_FILE_INFO, |
195 | S_IRUGO, acpi_device_dir(device), | |
106c19e7 | 196 | &acpi_button_info_fops, device); |
b34a8030 | 197 | if (!entry) |
d550d98d | 198 | return -ENODEV; |
b34a8030 AS |
199 | |
200 | /* show lid state [R] */ | |
201 | if (button->type == ACPI_BUTTON_TYPE_LID) { | |
cf7acfab DL |
202 | entry = proc_create_data(ACPI_BUTTON_FILE_STATE, |
203 | S_IRUGO, acpi_device_dir(device), | |
106c19e7 | 204 | &acpi_button_state_fops, device); |
b34a8030 | 205 | if (!entry) |
a6fc6720 | 206 | return -ENODEV; |
b34a8030 AS |
207 | } |
208 | ||
d550d98d | 209 | return 0; |
b34a8030 AS |
210 | } |
211 | ||
4be44fcd | 212 | static int acpi_button_remove_fs(struct acpi_device *device) |
b34a8030 | 213 | { |
c0968f0e | 214 | struct acpi_button *button = acpi_driver_data(device); |
b34a8030 | 215 | |
b34a8030 AS |
216 | if (acpi_device_dir(device)) { |
217 | if (button->type == ACPI_BUTTON_TYPE_LID) | |
218 | remove_proc_entry(ACPI_BUTTON_FILE_STATE, | |
4be44fcd | 219 | acpi_device_dir(device)); |
b34a8030 | 220 | remove_proc_entry(ACPI_BUTTON_FILE_INFO, |
4be44fcd | 221 | acpi_device_dir(device)); |
b34a8030 AS |
222 | |
223 | remove_proc_entry(acpi_device_bid(device), | |
4be44fcd | 224 | acpi_device_dir(device)->parent); |
b34a8030 AS |
225 | acpi_device_dir(device) = NULL; |
226 | } | |
227 | ||
d550d98d | 228 | return 0; |
b34a8030 AS |
229 | } |
230 | ||
1da177e4 LT |
231 | /* -------------------------------------------------------------------------- |
232 | Driver Interface | |
233 | -------------------------------------------------------------------------- */ | |
106c19e7 | 234 | static int acpi_lid_send_state(struct acpi_device *device) |
23de5d9e | 235 | { |
106c19e7 | 236 | struct acpi_button *button = acpi_driver_data(device); |
27663c58 | 237 | unsigned long long state; |
23de5d9e AS |
238 | acpi_status status; |
239 | ||
106c19e7 | 240 | status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state); |
23de5d9e AS |
241 | if (ACPI_FAILURE(status)) |
242 | return -ENODEV; | |
50a4da89 | 243 | |
23de5d9e AS |
244 | /* input layer checks if event is redundant */ |
245 | input_report_switch(button->input, SW_LID, !state); | |
df316e93 | 246 | input_sync(button->input); |
23de5d9e AS |
247 | return 0; |
248 | } | |
1da177e4 | 249 | |
373cfc36 | 250 | static void acpi_button_notify(struct acpi_device *device, u32 event) |
1da177e4 | 251 | { |
373cfc36 | 252 | struct acpi_button *button = acpi_driver_data(device); |
c0968f0e | 253 | struct input_dev *input; |
1da177e4 | 254 | |
1da177e4 | 255 | switch (event) { |
373cfc36 BH |
256 | case ACPI_FIXED_HARDWARE_EVENT: |
257 | event = ACPI_BUTTON_NOTIFY_STATUS; | |
258 | /* fall through */ | |
1da177e4 | 259 | case ACPI_BUTTON_NOTIFY_STATUS: |
c0968f0e | 260 | input = button->input; |
c0968f0e | 261 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
106c19e7 | 262 | acpi_lid_send_state(device); |
c0968f0e DT |
263 | } else { |
264 | int keycode = test_bit(KEY_SLEEP, input->keybit) ? | |
265 | KEY_SLEEP : KEY_POWER; | |
266 | ||
267 | input_report_key(input, keycode, 1); | |
268 | input_sync(input); | |
269 | input_report_key(input, keycode, 0); | |
df316e93 | 270 | input_sync(input); |
c0968f0e | 271 | } |
c0968f0e | 272 | |
106c19e7 | 273 | acpi_bus_generate_proc_event(device, event, ++button->pushed); |
1da177e4 LT |
274 | break; |
275 | default: | |
276 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 277 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
278 | break; |
279 | } | |
1da177e4 LT |
280 | } |
281 | ||
23de5d9e AS |
282 | static int acpi_button_resume(struct acpi_device *device) |
283 | { | |
1bce8113 | 284 | struct acpi_button *button = acpi_driver_data(device); |
50a4da89 | 285 | |
e2fb9754 | 286 | if (button->type == ACPI_BUTTON_TYPE_LID) |
106c19e7 | 287 | return acpi_lid_send_state(device); |
23de5d9e AS |
288 | return 0; |
289 | } | |
290 | ||
c0968f0e DT |
291 | static int acpi_button_add(struct acpi_device *device) |
292 | { | |
c0968f0e DT |
293 | struct acpi_button *button; |
294 | struct input_dev *input; | |
bf04a772 | 295 | char *hid, *name, *class; |
1bce8113 | 296 | int error; |
1da177e4 | 297 | |
c0968f0e | 298 | button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); |
1da177e4 | 299 | if (!button) |
d550d98d | 300 | return -ENOMEM; |
1da177e4 | 301 | |
db89b4f0 | 302 | device->driver_data = button; |
1da177e4 | 303 | |
c0968f0e DT |
304 | button->input = input = input_allocate_device(); |
305 | if (!input) { | |
306 | error = -ENOMEM; | |
307 | goto err_free_button; | |
308 | } | |
309 | ||
bf04a772 BH |
310 | hid = acpi_device_hid(device); |
311 | name = acpi_device_name(device); | |
312 | class = acpi_device_class(device); | |
313 | ||
d68b597c BH |
314 | if (!strcmp(hid, ACPI_BUTTON_HID_POWER) || |
315 | !strcmp(hid, ACPI_BUTTON_HID_POWERF)) { | |
1da177e4 | 316 | button->type = ACPI_BUTTON_TYPE_POWER; |
bf04a772 BH |
317 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER); |
318 | sprintf(class, "%s/%s", | |
1da177e4 | 319 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
d68b597c BH |
320 | } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) || |
321 | !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) { | |
1da177e4 | 322 | button->type = ACPI_BUTTON_TYPE_SLEEP; |
bf04a772 BH |
323 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP); |
324 | sprintf(class, "%s/%s", | |
1da177e4 | 325 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
bf04a772 | 326 | } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) { |
1da177e4 | 327 | button->type = ACPI_BUTTON_TYPE_LID; |
bf04a772 BH |
328 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID); |
329 | sprintf(class, "%s/%s", | |
1da177e4 | 330 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); |
4be44fcd | 331 | } else { |
bf04a772 | 332 | printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid); |
c0968f0e DT |
333 | error = -ENODEV; |
334 | goto err_free_input; | |
1da177e4 LT |
335 | } |
336 | ||
c0968f0e DT |
337 | error = acpi_button_add_fs(device); |
338 | if (error) | |
339 | goto err_free_input; | |
340 | ||
bf04a772 | 341 | snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid); |
c0968f0e | 342 | |
bf04a772 | 343 | input->name = name; |
c0968f0e DT |
344 | input->phys = button->phys; |
345 | input->id.bustype = BUS_HOST; | |
346 | input->id.product = button->type; | |
3b34e523 | 347 | input->dev.parent = &device->dev; |
b34a8030 | 348 | |
1da177e4 | 349 | switch (button->type) { |
c0968f0e | 350 | case ACPI_BUTTON_TYPE_POWER: |
7b19ada2 | 351 | input->evbit[0] = BIT_MASK(EV_KEY); |
c0968f0e | 352 | set_bit(KEY_POWER, input->keybit); |
1da177e4 | 353 | break; |
c0968f0e DT |
354 | |
355 | case ACPI_BUTTON_TYPE_SLEEP: | |
7b19ada2 | 356 | input->evbit[0] = BIT_MASK(EV_KEY); |
c0968f0e | 357 | set_bit(KEY_SLEEP, input->keybit); |
1da177e4 | 358 | break; |
c0968f0e DT |
359 | |
360 | case ACPI_BUTTON_TYPE_LID: | |
7b19ada2 | 361 | input->evbit[0] = BIT_MASK(EV_SW); |
c0968f0e | 362 | set_bit(SW_LID, input->swbit); |
1da177e4 LT |
363 | break; |
364 | } | |
365 | ||
c0968f0e DT |
366 | error = input_register_device(input); |
367 | if (error) | |
373cfc36 | 368 | goto err_remove_fs; |
23de5d9e | 369 | if (button->type == ACPI_BUTTON_TYPE_LID) |
106c19e7 | 370 | acpi_lid_send_state(device); |
1da177e4 LT |
371 | |
372 | if (device->wakeup.flags.valid) { | |
373 | /* Button's GPE is run-wake GPE */ | |
4be44fcd LB |
374 | acpi_set_gpe_type(device->wakeup.gpe_device, |
375 | device->wakeup.gpe_number, | |
376 | ACPI_GPE_TYPE_WAKE_RUN); | |
377 | acpi_enable_gpe(device->wakeup.gpe_device, | |
0b7084ac | 378 | device->wakeup.gpe_number); |
1da177e4 LT |
379 | device->wakeup.state.enabled = 1; |
380 | } | |
381 | ||
bf04a772 | 382 | printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device)); |
c0968f0e | 383 | return 0; |
1da177e4 | 384 | |
c0968f0e DT |
385 | err_remove_fs: |
386 | acpi_button_remove_fs(device); | |
387 | err_free_input: | |
388 | input_free_device(input); | |
389 | err_free_button: | |
390 | kfree(button); | |
391 | return error; | |
1da177e4 LT |
392 | } |
393 | ||
4be44fcd | 394 | static int acpi_button_remove(struct acpi_device *device, int type) |
1da177e4 | 395 | { |
1bce8113 | 396 | struct acpi_button *button = acpi_driver_data(device); |
1da177e4 | 397 | |
4be44fcd | 398 | acpi_button_remove_fs(device); |
c0968f0e | 399 | input_unregister_device(button->input); |
1da177e4 | 400 | kfree(button); |
d550d98d | 401 | return 0; |
1da177e4 LT |
402 | } |
403 | ||
4be44fcd | 404 | static int __init acpi_button_init(void) |
1da177e4 | 405 | { |
c0968f0e | 406 | int result; |
1da177e4 | 407 | |
b34a8030 AS |
408 | acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); |
409 | if (!acpi_button_dir) | |
d550d98d | 410 | return -ENODEV; |
50a4da89 | 411 | |
1da177e4 LT |
412 | result = acpi_bus_register_driver(&acpi_button_driver); |
413 | if (result < 0) { | |
b34a8030 | 414 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); |
d550d98d | 415 | return -ENODEV; |
1da177e4 LT |
416 | } |
417 | ||
d550d98d | 418 | return 0; |
1da177e4 LT |
419 | } |
420 | ||
4be44fcd | 421 | static void __exit acpi_button_exit(void) |
1da177e4 | 422 | { |
1da177e4 LT |
423 | acpi_bus_unregister_driver(&acpi_button_driver); |
424 | ||
4be44fcd | 425 | if (acpi_power_dir) |
b34a8030 AS |
426 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir); |
427 | if (acpi_sleep_dir) | |
428 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir); | |
429 | if (acpi_lid_dir) | |
430 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
431 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); | |
1da177e4 LT |
432 | } |
433 | ||
1da177e4 LT |
434 | module_init(acpi_button_init); |
435 | module_exit(acpi_button_exit); |