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1/*
2 * button.c - ACPI Button Driver
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>
29#include <linux/types.h>
30#include <linux/proc_fs.h>
31#include <linux/seq_file.h>
32#include <linux/input.h>
33#include <linux/slab.h>
34#include <acpi/acpi_bus.h>
35#include <acpi/acpi_drivers.h>
36
37#define PREFIX "ACPI: "
38
39#define ACPI_BUTTON_CLASS "button"
40#define ACPI_BUTTON_FILE_INFO "info"
41#define ACPI_BUTTON_FILE_STATE "state"
42#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
43#define ACPI_BUTTON_NOTIFY_STATUS 0x80
44
45#define ACPI_BUTTON_SUBCLASS_POWER "power"
46#define ACPI_BUTTON_HID_POWER "PNP0C0C"
47#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button"
48#define ACPI_BUTTON_TYPE_POWER 0x01
49
50#define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
51#define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
52#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button"
53#define ACPI_BUTTON_TYPE_SLEEP 0x03
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
61ACPI_MODULE_NAME("button");
62
63MODULE_AUTHOR("Paul Diefenbaugh");
64MODULE_DESCRIPTION("ACPI Button Driver");
65MODULE_LICENSE("GPL");
66
67static 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};
75MODULE_DEVICE_TABLE(acpi, button_device_ids);
76
77static int acpi_button_add(struct acpi_device *device);
78static int acpi_button_remove(struct acpi_device *device, int type);
79static int acpi_button_resume(struct acpi_device *device);
80static void acpi_button_notify(struct acpi_device *device, u32 event);
81
82static struct acpi_driver acpi_button_driver = {
83 .name = "button",
84 .class = ACPI_BUTTON_CLASS,
85 .ids = button_device_ids,
86 .ops = {
87 .add = acpi_button_add,
88 .resume = acpi_button_resume,
89 .remove = acpi_button_remove,
90 .notify = acpi_button_notify,
91 },
92};
93
94struct acpi_button {
95 unsigned int type;
96 struct input_dev *input;
97 char phys[32]; /* for input device */
98 unsigned long pushed;
99 bool wakeup_enabled;
100};
101
102static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier);
103static struct acpi_device *lid_device;
104
105/* --------------------------------------------------------------------------
106 FS Interface (/proc)
107 -------------------------------------------------------------------------- */
108
109static struct proc_dir_entry *acpi_button_dir;
110static struct proc_dir_entry *acpi_lid_dir;
111
112static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
113{
114 struct acpi_device *device = seq->private;
115 acpi_status status;
116 unsigned long long state;
117
118 status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
119 seq_printf(seq, "state: %s\n",
120 ACPI_FAILURE(status) ? "unsupported" :
121 (state ? "open" : "closed"));
122 return 0;
123}
124
125static int acpi_button_state_open_fs(struct inode *inode, struct file *file)
126{
127 return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
128}
129
130static const struct file_operations acpi_button_state_fops = {
131 .owner = THIS_MODULE,
132 .open = acpi_button_state_open_fs,
133 .read = seq_read,
134 .llseek = seq_lseek,
135 .release = single_release,
136};
137
138static int acpi_button_add_fs(struct acpi_device *device)
139{
140 struct acpi_button *button = acpi_driver_data(device);
141 struct proc_dir_entry *entry = NULL;
142 int ret = 0;
143
144 /* procfs I/F for ACPI lid device only */
145 if (button->type != ACPI_BUTTON_TYPE_LID)
146 return 0;
147
148 if (acpi_button_dir || acpi_lid_dir) {
149 printk(KERN_ERR PREFIX "More than one Lid device found!\n");
150 return -EEXIST;
151 }
152
153 /* create /proc/acpi/button */
154 acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
155 if (!acpi_button_dir)
156 return -ENODEV;
157
158 /* create /proc/acpi/button/lid */
159 acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
160 if (!acpi_lid_dir) {
161 ret = -ENODEV;
162 goto remove_button_dir;
163 }
164
165 /* create /proc/acpi/button/lid/LID/ */
166 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir);
167 if (!acpi_device_dir(device)) {
168 ret = -ENODEV;
169 goto remove_lid_dir;
170 }
171
172 /* create /proc/acpi/button/lid/LID/state */
173 entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
174 S_IRUGO, acpi_device_dir(device),
175 &acpi_button_state_fops, device);
176 if (!entry) {
177 ret = -ENODEV;
178 goto remove_dev_dir;
179 }
180
181done:
182 return ret;
183
184remove_dev_dir:
185 remove_proc_entry(acpi_device_bid(device),
186 acpi_lid_dir);
187 acpi_device_dir(device) = NULL;
188remove_lid_dir:
189 remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
190remove_button_dir:
191 remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
192 goto done;
193}
194
195static int acpi_button_remove_fs(struct acpi_device *device)
196{
197 struct acpi_button *button = acpi_driver_data(device);
198
199 if (button->type != ACPI_BUTTON_TYPE_LID)
200 return 0;
201
202 remove_proc_entry(ACPI_BUTTON_FILE_STATE,
203 acpi_device_dir(device));
204 remove_proc_entry(acpi_device_bid(device),
205 acpi_lid_dir);
206 acpi_device_dir(device) = NULL;
207 remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
208 remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
209
210 return 0;
211}
212
213/* --------------------------------------------------------------------------
214 Driver Interface
215 -------------------------------------------------------------------------- */
216int acpi_lid_notifier_register(struct notifier_block *nb)
217{
218 return blocking_notifier_chain_register(&acpi_lid_notifier, nb);
219}
220EXPORT_SYMBOL(acpi_lid_notifier_register);
221
222int acpi_lid_notifier_unregister(struct notifier_block *nb)
223{
224 return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb);
225}
226EXPORT_SYMBOL(acpi_lid_notifier_unregister);
227
228int acpi_lid_open(void)
229{
230 acpi_status status;
231 unsigned long long state;
232
233 if (!lid_device)
234 return -ENODEV;
235
236 status = acpi_evaluate_integer(lid_device->handle, "_LID", NULL,
237 &state);
238 if (ACPI_FAILURE(status))
239 return -ENODEV;
240
241 return !!state;
242}
243EXPORT_SYMBOL(acpi_lid_open);
244
245static int acpi_lid_send_state(struct acpi_device *device)
246{
247 struct acpi_button *button = acpi_driver_data(device);
248 unsigned long long state;
249 acpi_status status;
250 int ret;
251
252 status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
253 if (ACPI_FAILURE(status))
254 return -ENODEV;
255
256 /* input layer checks if event is redundant */
257 input_report_switch(button->input, SW_LID, !state);
258 input_sync(button->input);
259
260 if (state)
261 pm_wakeup_event(&device->dev, 0);
262
263 ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device);
264 if (ret == NOTIFY_DONE)
265 ret = blocking_notifier_call_chain(&acpi_lid_notifier, state,
266 device);
267 if (ret == NOTIFY_DONE || ret == NOTIFY_OK) {
268 /*
269 * It is also regarded as success if the notifier_chain
270 * returns NOTIFY_OK or NOTIFY_DONE.
271 */
272 ret = 0;
273 }
274 return ret;
275}
276
277static void acpi_button_notify(struct acpi_device *device, u32 event)
278{
279 struct acpi_button *button = acpi_driver_data(device);
280 struct input_dev *input;
281
282 switch (event) {
283 case ACPI_FIXED_HARDWARE_EVENT:
284 event = ACPI_BUTTON_NOTIFY_STATUS;
285 /* fall through */
286 case ACPI_BUTTON_NOTIFY_STATUS:
287 input = button->input;
288 if (button->type == ACPI_BUTTON_TYPE_LID) {
289 acpi_lid_send_state(device);
290 } else {
291 int keycode = test_bit(KEY_SLEEP, input->keybit) ?
292 KEY_SLEEP : KEY_POWER;
293
294 input_report_key(input, keycode, 1);
295 input_sync(input);
296 input_report_key(input, keycode, 0);
297 input_sync(input);
298
299 pm_wakeup_event(&device->dev, 0);
300 }
301
302 acpi_bus_generate_proc_event(device, event, ++button->pushed);
303 break;
304 default:
305 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
306 "Unsupported event [0x%x]\n", event));
307 break;
308 }
309}
310
311static int acpi_button_resume(struct acpi_device *device)
312{
313 struct acpi_button *button = acpi_driver_data(device);
314
315 if (button->type == ACPI_BUTTON_TYPE_LID)
316 return acpi_lid_send_state(device);
317 return 0;
318}
319
320static int acpi_button_add(struct acpi_device *device)
321{
322 struct acpi_button *button;
323 struct input_dev *input;
324 const char *hid = acpi_device_hid(device);
325 char *name, *class;
326 int error;
327
328 button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
329 if (!button)
330 return -ENOMEM;
331
332 device->driver_data = button;
333
334 button->input = input = input_allocate_device();
335 if (!input) {
336 error = -ENOMEM;
337 goto err_free_button;
338 }
339
340 name = acpi_device_name(device);
341 class = acpi_device_class(device);
342
343 if (!strcmp(hid, ACPI_BUTTON_HID_POWER) ||
344 !strcmp(hid, ACPI_BUTTON_HID_POWERF)) {
345 button->type = ACPI_BUTTON_TYPE_POWER;
346 strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER);
347 sprintf(class, "%s/%s",
348 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
349 } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) ||
350 !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) {
351 button->type = ACPI_BUTTON_TYPE_SLEEP;
352 strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP);
353 sprintf(class, "%s/%s",
354 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
355 } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) {
356 button->type = ACPI_BUTTON_TYPE_LID;
357 strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID);
358 sprintf(class, "%s/%s",
359 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
360 } else {
361 printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid);
362 error = -ENODEV;
363 goto err_free_input;
364 }
365
366 error = acpi_button_add_fs(device);
367 if (error)
368 goto err_free_input;
369
370 snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);
371
372 input->name = name;
373 input->phys = button->phys;
374 input->id.bustype = BUS_HOST;
375 input->id.product = button->type;
376 input->dev.parent = &device->dev;
377
378 switch (button->type) {
379 case ACPI_BUTTON_TYPE_POWER:
380 input->evbit[0] = BIT_MASK(EV_KEY);
381 set_bit(KEY_POWER, input->keybit);
382 break;
383
384 case ACPI_BUTTON_TYPE_SLEEP:
385 input->evbit[0] = BIT_MASK(EV_KEY);
386 set_bit(KEY_SLEEP, input->keybit);
387 break;
388
389 case ACPI_BUTTON_TYPE_LID:
390 input->evbit[0] = BIT_MASK(EV_SW);
391 set_bit(SW_LID, input->swbit);
392 break;
393 }
394
395 error = input_register_device(input);
396 if (error)
397 goto err_remove_fs;
398 if (button->type == ACPI_BUTTON_TYPE_LID) {
399 acpi_lid_send_state(device);
400 /*
401 * This assumes there's only one lid device, or if there are
402 * more we only care about the last one...
403 */
404 lid_device = device;
405 }
406
407 if (device->wakeup.flags.valid) {
408 /* Button's GPE is run-wake GPE */
409 acpi_enable_gpe(device->wakeup.gpe_device,
410 device->wakeup.gpe_number);
411 if (!device_may_wakeup(&device->dev)) {
412 device_set_wakeup_enable(&device->dev, true);
413 button->wakeup_enabled = true;
414 }
415 }
416
417 printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device));
418 return 0;
419
420 err_remove_fs:
421 acpi_button_remove_fs(device);
422 err_free_input:
423 input_free_device(input);
424 err_free_button:
425 kfree(button);
426 return error;
427}
428
429static int acpi_button_remove(struct acpi_device *device, int type)
430{
431 struct acpi_button *button = acpi_driver_data(device);
432
433 if (device->wakeup.flags.valid) {
434 acpi_disable_gpe(device->wakeup.gpe_device,
435 device->wakeup.gpe_number);
436 if (button->wakeup_enabled)
437 device_set_wakeup_enable(&device->dev, false);
438 }
439
440 acpi_button_remove_fs(device);
441 input_unregister_device(button->input);
442 kfree(button);
443 return 0;
444}
445
446static int __init acpi_button_init(void)
447{
448 return acpi_bus_register_driver(&acpi_button_driver);
449}
450
451static void __exit acpi_button_exit(void)
452{
453 acpi_bus_unregister_driver(&acpi_button_driver);
454}
455
456module_init(acpi_button_init);
457module_exit(acpi_button_exit);
1/*
2 * button.c - ACPI Button Driver
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 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
20 */
21
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/init.h>
25#include <linux/types.h>
26#include <linux/proc_fs.h>
27#include <linux/seq_file.h>
28#include <linux/input.h>
29#include <linux/slab.h>
30#include <linux/acpi.h>
31#include <acpi/button.h>
32
33#define PREFIX "ACPI: "
34
35#define ACPI_BUTTON_CLASS "button"
36#define ACPI_BUTTON_FILE_INFO "info"
37#define ACPI_BUTTON_FILE_STATE "state"
38#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
39#define ACPI_BUTTON_NOTIFY_STATUS 0x80
40
41#define ACPI_BUTTON_SUBCLASS_POWER "power"
42#define ACPI_BUTTON_HID_POWER "PNP0C0C"
43#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button"
44#define ACPI_BUTTON_TYPE_POWER 0x01
45
46#define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
47#define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
48#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button"
49#define ACPI_BUTTON_TYPE_SLEEP 0x03
50
51#define ACPI_BUTTON_SUBCLASS_LID "lid"
52#define ACPI_BUTTON_HID_LID "PNP0C0D"
53#define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch"
54#define ACPI_BUTTON_TYPE_LID 0x05
55
56#define _COMPONENT ACPI_BUTTON_COMPONENT
57ACPI_MODULE_NAME("button");
58
59MODULE_AUTHOR("Paul Diefenbaugh");
60MODULE_DESCRIPTION("ACPI Button Driver");
61MODULE_LICENSE("GPL");
62
63static const struct acpi_device_id button_device_ids[] = {
64 {ACPI_BUTTON_HID_LID, 0},
65 {ACPI_BUTTON_HID_SLEEP, 0},
66 {ACPI_BUTTON_HID_SLEEPF, 0},
67 {ACPI_BUTTON_HID_POWER, 0},
68 {ACPI_BUTTON_HID_POWERF, 0},
69 {"", 0},
70};
71MODULE_DEVICE_TABLE(acpi, button_device_ids);
72
73static int acpi_button_add(struct acpi_device *device);
74static int acpi_button_remove(struct acpi_device *device);
75static void acpi_button_notify(struct acpi_device *device, u32 event);
76
77#ifdef CONFIG_PM_SLEEP
78static int acpi_button_suspend(struct device *dev);
79static int acpi_button_resume(struct device *dev);
80#else
81#define acpi_button_suspend NULL
82#define acpi_button_resume NULL
83#endif
84static SIMPLE_DEV_PM_OPS(acpi_button_pm, acpi_button_suspend, acpi_button_resume);
85
86static struct acpi_driver acpi_button_driver = {
87 .name = "button",
88 .class = ACPI_BUTTON_CLASS,
89 .ids = button_device_ids,
90 .ops = {
91 .add = acpi_button_add,
92 .remove = acpi_button_remove,
93 .notify = acpi_button_notify,
94 },
95 .drv.pm = &acpi_button_pm,
96};
97
98struct acpi_button {
99 unsigned int type;
100 struct input_dev *input;
101 char phys[32]; /* for input device */
102 unsigned long pushed;
103 bool suspended;
104};
105
106static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier);
107static struct acpi_device *lid_device;
108
109/* --------------------------------------------------------------------------
110 FS Interface (/proc)
111 -------------------------------------------------------------------------- */
112
113static struct proc_dir_entry *acpi_button_dir;
114static struct proc_dir_entry *acpi_lid_dir;
115
116static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
117{
118 struct acpi_device *device = seq->private;
119 acpi_status status;
120 unsigned long long state;
121
122 status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
123 seq_printf(seq, "state: %s\n",
124 ACPI_FAILURE(status) ? "unsupported" :
125 (state ? "open" : "closed"));
126 return 0;
127}
128
129static int acpi_button_state_open_fs(struct inode *inode, struct file *file)
130{
131 return single_open(file, acpi_button_state_seq_show, PDE_DATA(inode));
132}
133
134static 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};
141
142static int acpi_button_add_fs(struct acpi_device *device)
143{
144 struct acpi_button *button = acpi_driver_data(device);
145 struct proc_dir_entry *entry = NULL;
146 int ret = 0;
147
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;
155 }
156
157 /* create /proc/acpi/button */
158 acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
159 if (!acpi_button_dir)
160 return -ENODEV;
161
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 }
168
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 }
175
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;
183 }
184
185done:
186 return ret;
187
188remove_dev_dir:
189 remove_proc_entry(acpi_device_bid(device),
190 acpi_lid_dir);
191 acpi_device_dir(device) = NULL;
192remove_lid_dir:
193 remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
194remove_button_dir:
195 remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
196 goto done;
197}
198
199static int acpi_button_remove_fs(struct acpi_device *device)
200{
201 struct acpi_button *button = acpi_driver_data(device);
202
203 if (button->type != ACPI_BUTTON_TYPE_LID)
204 return 0;
205
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);
213
214 return 0;
215}
216
217/* --------------------------------------------------------------------------
218 Driver Interface
219 -------------------------------------------------------------------------- */
220int acpi_lid_notifier_register(struct notifier_block *nb)
221{
222 return blocking_notifier_chain_register(&acpi_lid_notifier, nb);
223}
224EXPORT_SYMBOL(acpi_lid_notifier_register);
225
226int acpi_lid_notifier_unregister(struct notifier_block *nb)
227{
228 return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb);
229}
230EXPORT_SYMBOL(acpi_lid_notifier_unregister);
231
232int acpi_lid_open(void)
233{
234 acpi_status status;
235 unsigned long long state;
236
237 if (!lid_device)
238 return -ENODEV;
239
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}
247EXPORT_SYMBOL(acpi_lid_open);
248
249static int acpi_lid_send_state(struct acpi_device *device)
250{
251 struct acpi_button *button = acpi_driver_data(device);
252 unsigned long long state;
253 acpi_status status;
254 int ret;
255
256 status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
257 if (ACPI_FAILURE(status))
258 return -ENODEV;
259
260 /* input layer checks if event is redundant */
261 input_report_switch(button->input, SW_LID, !state);
262 input_sync(button->input);
263
264 if (state)
265 pm_wakeup_event(&device->dev, 0);
266
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);
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 }
278 return ret;
279}
280
281static void acpi_button_notify(struct acpi_device *device, u32 event)
282{
283 struct acpi_button *button = acpi_driver_data(device);
284 struct input_dev *input;
285
286 switch (event) {
287 case ACPI_FIXED_HARDWARE_EVENT:
288 event = ACPI_BUTTON_NOTIFY_STATUS;
289 /* fall through */
290 case ACPI_BUTTON_NOTIFY_STATUS:
291 input = button->input;
292 if (button->type == ACPI_BUTTON_TYPE_LID) {
293 acpi_lid_send_state(device);
294 } else {
295 int keycode;
296
297 pm_wakeup_event(&device->dev, 0);
298 if (button->suspended)
299 break;
300
301 keycode = test_bit(KEY_SLEEP, input->keybit) ?
302 KEY_SLEEP : KEY_POWER;
303 input_report_key(input, keycode, 1);
304 input_sync(input);
305 input_report_key(input, keycode, 0);
306 input_sync(input);
307
308 acpi_bus_generate_netlink_event(
309 device->pnp.device_class,
310 dev_name(&device->dev),
311 event, ++button->pushed);
312 }
313 break;
314 default:
315 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
316 "Unsupported event [0x%x]\n", event));
317 break;
318 }
319}
320
321#ifdef CONFIG_PM_SLEEP
322static int acpi_button_suspend(struct device *dev)
323{
324 struct acpi_device *device = to_acpi_device(dev);
325 struct acpi_button *button = acpi_driver_data(device);
326
327 button->suspended = true;
328 return 0;
329}
330
331static int acpi_button_resume(struct device *dev)
332{
333 struct acpi_device *device = to_acpi_device(dev);
334 struct acpi_button *button = acpi_driver_data(device);
335
336 button->suspended = false;
337 if (button->type == ACPI_BUTTON_TYPE_LID)
338 return acpi_lid_send_state(device);
339 return 0;
340}
341#endif
342
343static int acpi_button_add(struct acpi_device *device)
344{
345 struct acpi_button *button;
346 struct input_dev *input;
347 const char *hid = acpi_device_hid(device);
348 char *name, *class;
349 int error;
350
351 button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
352 if (!button)
353 return -ENOMEM;
354
355 device->driver_data = button;
356
357 button->input = input = input_allocate_device();
358 if (!input) {
359 error = -ENOMEM;
360 goto err_free_button;
361 }
362
363 name = acpi_device_name(device);
364 class = acpi_device_class(device);
365
366 if (!strcmp(hid, ACPI_BUTTON_HID_POWER) ||
367 !strcmp(hid, ACPI_BUTTON_HID_POWERF)) {
368 button->type = ACPI_BUTTON_TYPE_POWER;
369 strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER);
370 sprintf(class, "%s/%s",
371 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
372 } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) ||
373 !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) {
374 button->type = ACPI_BUTTON_TYPE_SLEEP;
375 strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP);
376 sprintf(class, "%s/%s",
377 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
378 } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) {
379 button->type = ACPI_BUTTON_TYPE_LID;
380 strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID);
381 sprintf(class, "%s/%s",
382 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
383 } else {
384 printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid);
385 error = -ENODEV;
386 goto err_free_input;
387 }
388
389 error = acpi_button_add_fs(device);
390 if (error)
391 goto err_free_input;
392
393 snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);
394
395 input->name = name;
396 input->phys = button->phys;
397 input->id.bustype = BUS_HOST;
398 input->id.product = button->type;
399 input->dev.parent = &device->dev;
400
401 switch (button->type) {
402 case ACPI_BUTTON_TYPE_POWER:
403 input_set_capability(input, EV_KEY, KEY_POWER);
404 break;
405
406 case ACPI_BUTTON_TYPE_SLEEP:
407 input_set_capability(input, EV_KEY, KEY_SLEEP);
408 break;
409
410 case ACPI_BUTTON_TYPE_LID:
411 input_set_capability(input, EV_SW, SW_LID);
412 break;
413 }
414
415 error = input_register_device(input);
416 if (error)
417 goto err_remove_fs;
418 if (button->type == ACPI_BUTTON_TYPE_LID) {
419 acpi_lid_send_state(device);
420 /*
421 * This assumes there's only one lid device, or if there are
422 * more we only care about the last one...
423 */
424 lid_device = device;
425 }
426
427 printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device));
428 return 0;
429
430 err_remove_fs:
431 acpi_button_remove_fs(device);
432 err_free_input:
433 input_free_device(input);
434 err_free_button:
435 kfree(button);
436 return error;
437}
438
439static int acpi_button_remove(struct acpi_device *device)
440{
441 struct acpi_button *button = acpi_driver_data(device);
442
443 acpi_button_remove_fs(device);
444 input_unregister_device(button->input);
445 kfree(button);
446 return 0;
447}
448
449module_acpi_driver(acpi_button_driver);