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