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_COMPONENT 0x00080000
37 #define ACPI_BUTTON_CLASS "button"
38 #define ACPI_BUTTON_FILE_INFO "info"
39 #define ACPI_BUTTON_FILE_STATE "state"
40 #define ACPI_BUTTON_TYPE_UNKNOWN 0x00
41 #define ACPI_BUTTON_NOTIFY_STATUS 0x80
43 #define ACPI_BUTTON_SUBCLASS_POWER "power"
44 #define ACPI_BUTTON_HID_POWER "PNP0C0C"
45 #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button (CM)"
46 #define ACPI_BUTTON_DEVICE_NAME_POWERF "Power Button (FF)"
47 #define ACPI_BUTTON_TYPE_POWER 0x01
48 #define ACPI_BUTTON_TYPE_POWERF 0x02
50 #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
51 #define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
52 #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button (CM)"
53 #define ACPI_BUTTON_DEVICE_NAME_SLEEPF "Sleep Button (FF)"
54 #define ACPI_BUTTON_TYPE_SLEEP 0x03
55 #define ACPI_BUTTON_TYPE_SLEEPF 0x04
57 #define ACPI_BUTTON_SUBCLASS_LID "lid"
58 #define ACPI_BUTTON_HID_LID "PNP0C0D"
59 #define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch"
60 #define ACPI_BUTTON_TYPE_LID 0x05
62 #define _COMPONENT ACPI_BUTTON_COMPONENT
63 ACPI_MODULE_NAME("button");
65 MODULE_AUTHOR("Paul Diefenbaugh");
66 MODULE_DESCRIPTION("ACPI Button Driver");
67 MODULE_LICENSE("GPL");
69 static const struct acpi_device_id button_device_ids
[] = {
70 {ACPI_BUTTON_HID_LID
, 0},
71 {ACPI_BUTTON_HID_SLEEP
, 0},
72 {ACPI_BUTTON_HID_SLEEPF
, 0},
73 {ACPI_BUTTON_HID_POWER
, 0},
74 {ACPI_BUTTON_HID_POWERF
, 0},
77 MODULE_DEVICE_TABLE(acpi
, button_device_ids
);
79 static int acpi_button_add(struct acpi_device
*device
);
80 static int acpi_button_remove(struct acpi_device
*device
, int type
);
81 static int acpi_button_resume(struct acpi_device
*device
);
82 static int acpi_button_info_open_fs(struct inode
*inode
, struct file
*file
);
83 static int acpi_button_state_open_fs(struct inode
*inode
, struct file
*file
);
85 static struct acpi_driver acpi_button_driver
= {
87 .class = ACPI_BUTTON_CLASS
,
88 .ids
= button_device_ids
,
90 .add
= acpi_button_add
,
91 .resume
= acpi_button_resume
,
92 .remove
= acpi_button_remove
,
97 struct acpi_device
*device
; /* Fixed button kludge */
99 struct input_dev
*input
;
100 char phys
[32]; /* for input device */
101 unsigned long pushed
;
104 static const struct file_operations acpi_button_info_fops
= {
105 .owner
= THIS_MODULE
,
106 .open
= acpi_button_info_open_fs
,
109 .release
= single_release
,
112 static const struct file_operations acpi_button_state_fops
= {
113 .owner
= THIS_MODULE
,
114 .open
= acpi_button_state_open_fs
,
117 .release
= single_release
,
120 /* --------------------------------------------------------------------------
122 -------------------------------------------------------------------------- */
124 static struct proc_dir_entry
*acpi_button_dir
;
126 static int acpi_button_info_seq_show(struct seq_file
*seq
, void *offset
)
128 struct acpi_button
*button
= seq
->private;
130 if (!button
|| !button
->device
)
133 seq_printf(seq
, "type: %s\n",
134 acpi_device_name(button
->device
));
139 static int acpi_button_info_open_fs(struct inode
*inode
, struct file
*file
)
141 return single_open(file
, acpi_button_info_seq_show
, PDE(inode
)->data
);
144 static int acpi_button_state_seq_show(struct seq_file
*seq
, void *offset
)
146 struct acpi_button
*button
= seq
->private;
148 unsigned long long state
;
150 if (!button
|| !button
->device
)
153 status
= acpi_evaluate_integer(button
->device
->handle
, "_LID", NULL
, &state
);
154 seq_printf(seq
, "state: %s\n",
155 ACPI_FAILURE(status
) ? "unsupported" :
156 (state
? "open" : "closed"));
160 static int acpi_button_state_open_fs(struct inode
*inode
, struct file
*file
)
162 return single_open(file
, acpi_button_state_seq_show
, PDE(inode
)->data
);
165 static struct proc_dir_entry
*acpi_power_dir
;
166 static struct proc_dir_entry
*acpi_sleep_dir
;
167 static struct proc_dir_entry
*acpi_lid_dir
;
169 static int acpi_button_add_fs(struct acpi_device
*device
)
171 struct proc_dir_entry
*entry
= NULL
;
172 struct acpi_button
*button
;
174 if (!device
|| !acpi_driver_data(device
))
177 button
= acpi_driver_data(device
);
179 switch (button
->type
) {
180 case ACPI_BUTTON_TYPE_POWER
:
181 case ACPI_BUTTON_TYPE_POWERF
:
183 acpi_power_dir
= proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER
,
185 entry
= acpi_power_dir
;
187 case ACPI_BUTTON_TYPE_SLEEP
:
188 case ACPI_BUTTON_TYPE_SLEEPF
:
190 acpi_sleep_dir
= proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP
,
192 entry
= acpi_sleep_dir
;
194 case ACPI_BUTTON_TYPE_LID
:
196 acpi_lid_dir
= proc_mkdir(ACPI_BUTTON_SUBCLASS_LID
,
198 entry
= acpi_lid_dir
;
204 entry
->owner
= THIS_MODULE
;
206 acpi_device_dir(device
) = proc_mkdir(acpi_device_bid(device
), entry
);
207 if (!acpi_device_dir(device
))
209 acpi_device_dir(device
)->owner
= THIS_MODULE
;
212 entry
= proc_create_data(ACPI_BUTTON_FILE_INFO
,
213 S_IRUGO
, acpi_device_dir(device
),
214 &acpi_button_info_fops
,
215 acpi_driver_data(device
));
219 /* show lid state [R] */
220 if (button
->type
== ACPI_BUTTON_TYPE_LID
) {
221 entry
= proc_create_data(ACPI_BUTTON_FILE_STATE
,
222 S_IRUGO
, acpi_device_dir(device
),
223 &acpi_button_state_fops
,
224 acpi_driver_data(device
));
232 static int acpi_button_remove_fs(struct acpi_device
*device
)
234 struct acpi_button
*button
= acpi_driver_data(device
);
236 if (acpi_device_dir(device
)) {
237 if (button
->type
== ACPI_BUTTON_TYPE_LID
)
238 remove_proc_entry(ACPI_BUTTON_FILE_STATE
,
239 acpi_device_dir(device
));
240 remove_proc_entry(ACPI_BUTTON_FILE_INFO
,
241 acpi_device_dir(device
));
243 remove_proc_entry(acpi_device_bid(device
),
244 acpi_device_dir(device
)->parent
);
245 acpi_device_dir(device
) = NULL
;
251 /* --------------------------------------------------------------------------
253 -------------------------------------------------------------------------- */
254 static int acpi_lid_send_state(struct acpi_button
*button
)
256 unsigned long long state
;
259 status
= acpi_evaluate_integer(button
->device
->handle
, "_LID", NULL
,
261 if (ACPI_FAILURE(status
))
263 /* input layer checks if event is redundant */
264 input_report_switch(button
->input
, SW_LID
, !state
);
265 input_sync(button
->input
);
269 static void acpi_button_notify(acpi_handle handle
, u32 event
, void *data
)
271 struct acpi_button
*button
= data
;
272 struct input_dev
*input
;
274 if (!button
|| !button
->device
)
278 case ACPI_BUTTON_NOTIFY_STATUS
:
279 input
= button
->input
;
280 if (button
->type
== ACPI_BUTTON_TYPE_LID
) {
281 acpi_lid_send_state(button
);
283 int keycode
= test_bit(KEY_SLEEP
, input
->keybit
) ?
284 KEY_SLEEP
: KEY_POWER
;
286 input_report_key(input
, keycode
, 1);
288 input_report_key(input
, keycode
, 0);
292 acpi_bus_generate_proc_event(button
->device
, event
,
296 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
297 "Unsupported event [0x%x]\n", event
));
304 static acpi_status
acpi_button_notify_fixed(void *data
)
306 struct acpi_button
*button
= data
;
309 return AE_BAD_PARAMETER
;
311 acpi_button_notify(button
->device
->handle
, ACPI_BUTTON_NOTIFY_STATUS
, button
);
316 static int acpi_button_install_notify_handlers(struct acpi_button
*button
)
320 switch (button
->type
) {
321 case ACPI_BUTTON_TYPE_POWERF
:
323 acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON
,
324 acpi_button_notify_fixed
,
327 case ACPI_BUTTON_TYPE_SLEEPF
:
329 acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON
,
330 acpi_button_notify_fixed
,
334 status
= acpi_install_notify_handler(button
->device
->handle
,
341 return ACPI_FAILURE(status
) ? -ENODEV
: 0;
344 static int acpi_button_resume(struct acpi_device
*device
)
346 struct acpi_button
*button
;
349 button
= acpi_driver_data(device
);
350 if (button
&& button
->type
== ACPI_BUTTON_TYPE_LID
)
351 return acpi_lid_send_state(button
);
355 static void acpi_button_remove_notify_handlers(struct acpi_button
*button
)
357 switch (button
->type
) {
358 case ACPI_BUTTON_TYPE_POWERF
:
359 acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON
,
360 acpi_button_notify_fixed
);
362 case ACPI_BUTTON_TYPE_SLEEPF
:
363 acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON
,
364 acpi_button_notify_fixed
);
367 acpi_remove_notify_handler(button
->device
->handle
,
374 static int acpi_button_add(struct acpi_device
*device
)
377 struct acpi_button
*button
;
378 struct input_dev
*input
;
383 button
= kzalloc(sizeof(struct acpi_button
), GFP_KERNEL
);
387 button
->device
= device
;
388 device
->driver_data
= button
;
390 button
->input
= input
= input_allocate_device();
393 goto err_free_button
;
397 * Determine the button type (via hid), as fixed-feature buttons
398 * need to be handled a bit differently than generic-space.
400 if (!strcmp(acpi_device_hid(device
), ACPI_BUTTON_HID_POWER
)) {
401 button
->type
= ACPI_BUTTON_TYPE_POWER
;
402 strcpy(acpi_device_name(device
), ACPI_BUTTON_DEVICE_NAME_POWER
);
403 sprintf(acpi_device_class(device
), "%s/%s",
404 ACPI_BUTTON_CLASS
, ACPI_BUTTON_SUBCLASS_POWER
);
405 } else if (!strcmp(acpi_device_hid(device
), ACPI_BUTTON_HID_POWERF
)) {
406 button
->type
= ACPI_BUTTON_TYPE_POWERF
;
407 strcpy(acpi_device_name(device
),
408 ACPI_BUTTON_DEVICE_NAME_POWERF
);
409 sprintf(acpi_device_class(device
), "%s/%s",
410 ACPI_BUTTON_CLASS
, ACPI_BUTTON_SUBCLASS_POWER
);
411 } else if (!strcmp(acpi_device_hid(device
), ACPI_BUTTON_HID_SLEEP
)) {
412 button
->type
= ACPI_BUTTON_TYPE_SLEEP
;
413 strcpy(acpi_device_name(device
), ACPI_BUTTON_DEVICE_NAME_SLEEP
);
414 sprintf(acpi_device_class(device
), "%s/%s",
415 ACPI_BUTTON_CLASS
, ACPI_BUTTON_SUBCLASS_SLEEP
);
416 } else if (!strcmp(acpi_device_hid(device
), ACPI_BUTTON_HID_SLEEPF
)) {
417 button
->type
= ACPI_BUTTON_TYPE_SLEEPF
;
418 strcpy(acpi_device_name(device
),
419 ACPI_BUTTON_DEVICE_NAME_SLEEPF
);
420 sprintf(acpi_device_class(device
), "%s/%s",
421 ACPI_BUTTON_CLASS
, ACPI_BUTTON_SUBCLASS_SLEEP
);
422 } else if (!strcmp(acpi_device_hid(device
), ACPI_BUTTON_HID_LID
)) {
423 button
->type
= ACPI_BUTTON_TYPE_LID
;
424 strcpy(acpi_device_name(device
), ACPI_BUTTON_DEVICE_NAME_LID
);
425 sprintf(acpi_device_class(device
), "%s/%s",
426 ACPI_BUTTON_CLASS
, ACPI_BUTTON_SUBCLASS_LID
);
428 printk(KERN_ERR PREFIX
"Unsupported hid [%s]\n",
429 acpi_device_hid(device
));
434 error
= acpi_button_add_fs(device
);
438 error
= acpi_button_install_notify_handlers(button
);
442 snprintf(button
->phys
, sizeof(button
->phys
),
443 "%s/button/input0", acpi_device_hid(device
));
445 input
->name
= acpi_device_name(device
);
446 input
->phys
= button
->phys
;
447 input
->id
.bustype
= BUS_HOST
;
448 input
->id
.product
= button
->type
;
449 input
->dev
.parent
= &device
->dev
;
451 switch (button
->type
) {
452 case ACPI_BUTTON_TYPE_POWER
:
453 case ACPI_BUTTON_TYPE_POWERF
:
454 input
->evbit
[0] = BIT_MASK(EV_KEY
);
455 set_bit(KEY_POWER
, input
->keybit
);
458 case ACPI_BUTTON_TYPE_SLEEP
:
459 case ACPI_BUTTON_TYPE_SLEEPF
:
460 input
->evbit
[0] = BIT_MASK(EV_KEY
);
461 set_bit(KEY_SLEEP
, input
->keybit
);
464 case ACPI_BUTTON_TYPE_LID
:
465 input
->evbit
[0] = BIT_MASK(EV_SW
);
466 set_bit(SW_LID
, input
->swbit
);
470 error
= input_register_device(input
);
472 goto err_remove_handlers
;
473 if (button
->type
== ACPI_BUTTON_TYPE_LID
)
474 acpi_lid_send_state(button
);
476 if (device
->wakeup
.flags
.valid
) {
477 /* Button's GPE is run-wake GPE */
478 acpi_set_gpe_type(device
->wakeup
.gpe_device
,
479 device
->wakeup
.gpe_number
,
480 ACPI_GPE_TYPE_WAKE_RUN
);
481 acpi_enable_gpe(device
->wakeup
.gpe_device
,
482 device
->wakeup
.gpe_number
, ACPI_NOT_ISR
);
483 device
->wakeup
.state
.enabled
= 1;
486 printk(KERN_INFO PREFIX
"%s [%s]\n",
487 acpi_device_name(device
), acpi_device_bid(device
));
492 acpi_button_remove_notify_handlers(button
);
494 acpi_button_remove_fs(device
);
496 input_free_device(input
);
502 static int acpi_button_remove(struct acpi_device
*device
, int type
)
504 struct acpi_button
*button
;
506 if (!device
|| !acpi_driver_data(device
))
509 button
= acpi_driver_data(device
);
511 acpi_button_remove_notify_handlers(button
);
512 acpi_button_remove_fs(device
);
513 input_unregister_device(button
->input
);
519 static int __init
acpi_button_init(void)
523 acpi_button_dir
= proc_mkdir(ACPI_BUTTON_CLASS
, acpi_root_dir
);
524 if (!acpi_button_dir
)
526 acpi_button_dir
->owner
= THIS_MODULE
;
527 result
= acpi_bus_register_driver(&acpi_button_driver
);
529 remove_proc_entry(ACPI_BUTTON_CLASS
, acpi_root_dir
);
536 static void __exit
acpi_button_exit(void)
538 acpi_bus_unregister_driver(&acpi_button_driver
);
541 remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER
, acpi_button_dir
);
543 remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP
, acpi_button_dir
);
545 remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID
, acpi_button_dir
);
546 remove_proc_entry(ACPI_BUTTON_CLASS
, acpi_root_dir
);
549 module_init(acpi_button_init
);
550 module_exit(acpi_button_exit
);