2 * acpi_button.c - ACPI Button Driver ($Revision: 30 $)
4 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
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.
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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 <acpi/acpi_bus.h>
34 #include <acpi/acpi_drivers.h>
36 #define ACPI_BUTTON_CLASS "button"
37 #define ACPI_BUTTON_FILE_INFO "info"
38 #define ACPI_BUTTON_FILE_STATE "state"
39 #define ACPI_BUTTON_TYPE_UNKNOWN 0x00
40 #define ACPI_BUTTON_NOTIFY_STATUS 0x80
42 #define ACPI_BUTTON_SUBCLASS_POWER "power"
43 #define ACPI_BUTTON_HID_POWER "PNP0C0C"
44 #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button (CM)"
45 #define ACPI_BUTTON_DEVICE_NAME_POWERF "Power Button (FF)"
46 #define ACPI_BUTTON_TYPE_POWER 0x01
47 #define ACPI_BUTTON_TYPE_POWERF 0x02
49 #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
50 #define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
51 #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button (CM)"
52 #define ACPI_BUTTON_DEVICE_NAME_SLEEPF "Sleep Button (FF)"
53 #define ACPI_BUTTON_TYPE_SLEEP 0x03
54 #define ACPI_BUTTON_TYPE_SLEEPF 0x04
56 #define ACPI_BUTTON_SUBCLASS_LID "lid"
57 #define ACPI_BUTTON_HID_LID "PNP0C0D"
58 #define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch"
59 #define ACPI_BUTTON_TYPE_LID 0x05
61 #define _COMPONENT ACPI_BUTTON_COMPONENT
62 ACPI_MODULE_NAME("button");
64 MODULE_AUTHOR("Paul Diefenbaugh");
65 MODULE_DESCRIPTION("ACPI Button Driver");
66 MODULE_LICENSE("GPL");
68 static const struct acpi_device_id button_device_ids
[] = {
69 {ACPI_BUTTON_HID_LID
, 0},
70 {ACPI_BUTTON_HID_SLEEP
, 0},
71 {ACPI_BUTTON_HID_SLEEPF
, 0},
72 {ACPI_BUTTON_HID_POWER
, 0},
73 {ACPI_BUTTON_HID_POWERF
, 0},
76 MODULE_DEVICE_TABLE(acpi
, button_device_ids
);
78 static int acpi_button_add(struct acpi_device
*device
);
79 static int acpi_button_remove(struct acpi_device
*device
, int type
);
80 static int acpi_button_resume(struct acpi_device
*device
);
81 static int acpi_button_info_open_fs(struct inode
*inode
, struct file
*file
);
82 static int acpi_button_state_open_fs(struct inode
*inode
, struct file
*file
);
84 static struct acpi_driver acpi_button_driver
= {
86 .class = ACPI_BUTTON_CLASS
,
87 .ids
= button_device_ids
,
89 .add
= acpi_button_add
,
90 .resume
= acpi_button_resume
,
91 .remove
= acpi_button_remove
,
96 struct acpi_device
*device
; /* Fixed button kludge */
98 struct input_dev
*input
;
99 char phys
[32]; /* for input device */
100 unsigned long pushed
;
103 static const struct file_operations acpi_button_info_fops
= {
104 .owner
= THIS_MODULE
,
105 .open
= acpi_button_info_open_fs
,
108 .release
= single_release
,
111 static const struct file_operations acpi_button_state_fops
= {
112 .owner
= THIS_MODULE
,
113 .open
= acpi_button_state_open_fs
,
116 .release
= single_release
,
119 /* --------------------------------------------------------------------------
121 -------------------------------------------------------------------------- */
123 static struct proc_dir_entry
*acpi_button_dir
;
125 static int acpi_button_info_seq_show(struct seq_file
*seq
, void *offset
)
127 struct acpi_button
*button
= seq
->private;
129 if (!button
|| !button
->device
)
132 seq_printf(seq
, "type: %s\n",
133 acpi_device_name(button
->device
));
138 static int acpi_button_info_open_fs(struct inode
*inode
, struct file
*file
)
140 return single_open(file
, acpi_button_info_seq_show
, PDE(inode
)->data
);
143 static int acpi_button_state_seq_show(struct seq_file
*seq
, void *offset
)
145 struct acpi_button
*button
= seq
->private;
147 unsigned long long state
;
149 if (!button
|| !button
->device
)
152 status
= acpi_evaluate_integer(button
->device
->handle
, "_LID", NULL
, &state
);
153 seq_printf(seq
, "state: %s\n",
154 ACPI_FAILURE(status
) ? "unsupported" :
155 (state
? "open" : "closed"));
159 static int acpi_button_state_open_fs(struct inode
*inode
, struct file
*file
)
161 return single_open(file
, acpi_button_state_seq_show
, PDE(inode
)->data
);
164 static struct proc_dir_entry
*acpi_power_dir
;
165 static struct proc_dir_entry
*acpi_sleep_dir
;
166 static struct proc_dir_entry
*acpi_lid_dir
;
168 static int acpi_button_add_fs(struct acpi_device
*device
)
170 struct proc_dir_entry
*entry
= NULL
;
171 struct acpi_button
*button
;
173 if (!device
|| !acpi_driver_data(device
))
176 button
= acpi_driver_data(device
);
178 switch (button
->type
) {
179 case ACPI_BUTTON_TYPE_POWER
:
180 case ACPI_BUTTON_TYPE_POWERF
:
182 acpi_power_dir
= proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER
,
184 entry
= acpi_power_dir
;
186 case ACPI_BUTTON_TYPE_SLEEP
:
187 case ACPI_BUTTON_TYPE_SLEEPF
:
189 acpi_sleep_dir
= proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP
,
191 entry
= acpi_sleep_dir
;
193 case ACPI_BUTTON_TYPE_LID
:
195 acpi_lid_dir
= proc_mkdir(ACPI_BUTTON_SUBCLASS_LID
,
197 entry
= acpi_lid_dir
;
204 acpi_device_dir(device
) = proc_mkdir(acpi_device_bid(device
), entry
);
205 if (!acpi_device_dir(device
))
209 entry
= proc_create_data(ACPI_BUTTON_FILE_INFO
,
210 S_IRUGO
, acpi_device_dir(device
),
211 &acpi_button_info_fops
,
212 acpi_driver_data(device
));
216 /* show lid state [R] */
217 if (button
->type
== ACPI_BUTTON_TYPE_LID
) {
218 entry
= proc_create_data(ACPI_BUTTON_FILE_STATE
,
219 S_IRUGO
, acpi_device_dir(device
),
220 &acpi_button_state_fops
,
221 acpi_driver_data(device
));
229 static int acpi_button_remove_fs(struct acpi_device
*device
)
231 struct acpi_button
*button
= acpi_driver_data(device
);
233 if (acpi_device_dir(device
)) {
234 if (button
->type
== ACPI_BUTTON_TYPE_LID
)
235 remove_proc_entry(ACPI_BUTTON_FILE_STATE
,
236 acpi_device_dir(device
));
237 remove_proc_entry(ACPI_BUTTON_FILE_INFO
,
238 acpi_device_dir(device
));
240 remove_proc_entry(acpi_device_bid(device
),
241 acpi_device_dir(device
)->parent
);
242 acpi_device_dir(device
) = NULL
;
248 /* --------------------------------------------------------------------------
250 -------------------------------------------------------------------------- */
251 static int acpi_lid_send_state(struct acpi_button
*button
)
253 unsigned long long state
;
256 status
= acpi_evaluate_integer(button
->device
->handle
, "_LID", NULL
,
258 if (ACPI_FAILURE(status
))
260 /* input layer checks if event is redundant */
261 input_report_switch(button
->input
, SW_LID
, !state
);
262 input_sync(button
->input
);
266 static void acpi_button_notify(acpi_handle handle
, u32 event
, void *data
)
268 struct acpi_button
*button
= data
;
269 struct input_dev
*input
;
271 if (!button
|| !button
->device
)
275 case ACPI_BUTTON_NOTIFY_STATUS
:
276 input
= button
->input
;
277 if (button
->type
== ACPI_BUTTON_TYPE_LID
) {
278 acpi_lid_send_state(button
);
280 int keycode
= test_bit(KEY_SLEEP
, input
->keybit
) ?
281 KEY_SLEEP
: KEY_POWER
;
283 input_report_key(input
, keycode
, 1);
285 input_report_key(input
, keycode
, 0);
289 acpi_bus_generate_proc_event(button
->device
, event
,
293 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
294 "Unsupported event [0x%x]\n", event
));
301 static acpi_status
acpi_button_notify_fixed(void *data
)
303 struct acpi_button
*button
= data
;
306 return AE_BAD_PARAMETER
;
308 acpi_button_notify(button
->device
->handle
, ACPI_BUTTON_NOTIFY_STATUS
, button
);
313 static int acpi_button_install_notify_handlers(struct acpi_button
*button
)
317 switch (button
->type
) {
318 case ACPI_BUTTON_TYPE_POWERF
:
320 acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON
,
321 acpi_button_notify_fixed
,
324 case ACPI_BUTTON_TYPE_SLEEPF
:
326 acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON
,
327 acpi_button_notify_fixed
,
331 status
= acpi_install_notify_handler(button
->device
->handle
,
338 return ACPI_FAILURE(status
) ? -ENODEV
: 0;
341 static int acpi_button_resume(struct acpi_device
*device
)
343 struct acpi_button
*button
;
346 button
= acpi_driver_data(device
);
347 if (button
&& button
->type
== ACPI_BUTTON_TYPE_LID
)
348 return acpi_lid_send_state(button
);
352 static void acpi_button_remove_notify_handlers(struct acpi_button
*button
)
354 switch (button
->type
) {
355 case ACPI_BUTTON_TYPE_POWERF
:
356 acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON
,
357 acpi_button_notify_fixed
);
359 case ACPI_BUTTON_TYPE_SLEEPF
:
360 acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON
,
361 acpi_button_notify_fixed
);
364 acpi_remove_notify_handler(button
->device
->handle
,
371 static int acpi_button_add(struct acpi_device
*device
)
374 struct acpi_button
*button
;
375 struct input_dev
*input
;
380 button
= kzalloc(sizeof(struct acpi_button
), GFP_KERNEL
);
384 button
->device
= device
;
385 device
->driver_data
= button
;
387 button
->input
= input
= input_allocate_device();
390 goto err_free_button
;
394 * Determine the button type (via hid), as fixed-feature buttons
395 * need to be handled a bit differently than generic-space.
397 if (!strcmp(acpi_device_hid(device
), ACPI_BUTTON_HID_POWER
)) {
398 button
->type
= ACPI_BUTTON_TYPE_POWER
;
399 strcpy(acpi_device_name(device
), ACPI_BUTTON_DEVICE_NAME_POWER
);
400 sprintf(acpi_device_class(device
), "%s/%s",
401 ACPI_BUTTON_CLASS
, ACPI_BUTTON_SUBCLASS_POWER
);
402 } else if (!strcmp(acpi_device_hid(device
), ACPI_BUTTON_HID_POWERF
)) {
403 button
->type
= ACPI_BUTTON_TYPE_POWERF
;
404 strcpy(acpi_device_name(device
),
405 ACPI_BUTTON_DEVICE_NAME_POWERF
);
406 sprintf(acpi_device_class(device
), "%s/%s",
407 ACPI_BUTTON_CLASS
, ACPI_BUTTON_SUBCLASS_POWER
);
408 } else if (!strcmp(acpi_device_hid(device
), ACPI_BUTTON_HID_SLEEP
)) {
409 button
->type
= ACPI_BUTTON_TYPE_SLEEP
;
410 strcpy(acpi_device_name(device
), ACPI_BUTTON_DEVICE_NAME_SLEEP
);
411 sprintf(acpi_device_class(device
), "%s/%s",
412 ACPI_BUTTON_CLASS
, ACPI_BUTTON_SUBCLASS_SLEEP
);
413 } else if (!strcmp(acpi_device_hid(device
), ACPI_BUTTON_HID_SLEEPF
)) {
414 button
->type
= ACPI_BUTTON_TYPE_SLEEPF
;
415 strcpy(acpi_device_name(device
),
416 ACPI_BUTTON_DEVICE_NAME_SLEEPF
);
417 sprintf(acpi_device_class(device
), "%s/%s",
418 ACPI_BUTTON_CLASS
, ACPI_BUTTON_SUBCLASS_SLEEP
);
419 } else if (!strcmp(acpi_device_hid(device
), ACPI_BUTTON_HID_LID
)) {
420 button
->type
= ACPI_BUTTON_TYPE_LID
;
421 strcpy(acpi_device_name(device
), ACPI_BUTTON_DEVICE_NAME_LID
);
422 sprintf(acpi_device_class(device
), "%s/%s",
423 ACPI_BUTTON_CLASS
, ACPI_BUTTON_SUBCLASS_LID
);
425 printk(KERN_ERR PREFIX
"Unsupported hid [%s]\n",
426 acpi_device_hid(device
));
431 error
= acpi_button_add_fs(device
);
435 error
= acpi_button_install_notify_handlers(button
);
439 snprintf(button
->phys
, sizeof(button
->phys
),
440 "%s/button/input0", acpi_device_hid(device
));
442 input
->name
= acpi_device_name(device
);
443 input
->phys
= button
->phys
;
444 input
->id
.bustype
= BUS_HOST
;
445 input
->id
.product
= button
->type
;
446 input
->dev
.parent
= &device
->dev
;
448 switch (button
->type
) {
449 case ACPI_BUTTON_TYPE_POWER
:
450 case ACPI_BUTTON_TYPE_POWERF
:
451 input
->evbit
[0] = BIT_MASK(EV_KEY
);
452 set_bit(KEY_POWER
, input
->keybit
);
455 case ACPI_BUTTON_TYPE_SLEEP
:
456 case ACPI_BUTTON_TYPE_SLEEPF
:
457 input
->evbit
[0] = BIT_MASK(EV_KEY
);
458 set_bit(KEY_SLEEP
, input
->keybit
);
461 case ACPI_BUTTON_TYPE_LID
:
462 input
->evbit
[0] = BIT_MASK(EV_SW
);
463 set_bit(SW_LID
, input
->swbit
);
467 error
= input_register_device(input
);
469 goto err_remove_handlers
;
470 if (button
->type
== ACPI_BUTTON_TYPE_LID
)
471 acpi_lid_send_state(button
);
473 if (device
->wakeup
.flags
.valid
) {
474 /* Button's GPE is run-wake GPE */
475 acpi_set_gpe_type(device
->wakeup
.gpe_device
,
476 device
->wakeup
.gpe_number
,
477 ACPI_GPE_TYPE_WAKE_RUN
);
478 acpi_enable_gpe(device
->wakeup
.gpe_device
,
479 device
->wakeup
.gpe_number
);
480 device
->wakeup
.state
.enabled
= 1;
483 printk(KERN_INFO PREFIX
"%s [%s]\n",
484 acpi_device_name(device
), acpi_device_bid(device
));
489 acpi_button_remove_notify_handlers(button
);
491 acpi_button_remove_fs(device
);
493 input_free_device(input
);
499 static int acpi_button_remove(struct acpi_device
*device
, int type
)
501 struct acpi_button
*button
;
503 if (!device
|| !acpi_driver_data(device
))
506 button
= acpi_driver_data(device
);
508 acpi_button_remove_notify_handlers(button
);
509 acpi_button_remove_fs(device
);
510 input_unregister_device(button
->input
);
516 static int __init
acpi_button_init(void)
520 acpi_button_dir
= proc_mkdir(ACPI_BUTTON_CLASS
, acpi_root_dir
);
521 if (!acpi_button_dir
)
523 result
= acpi_bus_register_driver(&acpi_button_driver
);
525 remove_proc_entry(ACPI_BUTTON_CLASS
, acpi_root_dir
);
532 static void __exit
acpi_button_exit(void)
534 acpi_bus_unregister_driver(&acpi_button_driver
);
537 remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER
, acpi_button_dir
);
539 remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP
, acpi_button_dir
);
541 remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID
, acpi_button_dir
);
542 remove_proc_entry(ACPI_BUTTON_CLASS
, acpi_root_dir
);
545 module_init(acpi_button_init
);
546 module_exit(acpi_button_exit
);