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 <acpi/acpi_bus.h>
30 #include <acpi/acpi_drivers.h>
33 #define ACPI_BUTTON_COMPONENT 0x00080000
34 #define ACPI_BUTTON_DRIVER_NAME "ACPI Button Driver"
35 #define ACPI_BUTTON_CLASS "button"
36 #define ACPI_BUTTON_NOTIFY_STATUS 0x80
38 #define ACPI_BUTTON_SUBCLASS_POWER "power"
39 #define ACPI_BUTTON_HID_POWER "PNP0C0C"
40 #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button (CM)"
41 #define ACPI_BUTTON_DEVICE_NAME_POWERF "Power Button (FF)"
42 #define ACPI_BUTTON_TYPE_POWER 0x01
43 #define ACPI_BUTTON_TYPE_POWERF 0x02
45 #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
46 #define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
47 #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button (CM)"
48 #define ACPI_BUTTON_DEVICE_NAME_SLEEPF "Sleep Button (FF)"
49 #define ACPI_BUTTON_TYPE_SLEEP 0x03
50 #define ACPI_BUTTON_TYPE_SLEEPF 0x04
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
57 #define _COMPONENT ACPI_BUTTON_COMPONENT
58 ACPI_MODULE_NAME ("acpi_button")
60 MODULE_AUTHOR("Paul Diefenbaugh");
61 MODULE_DESCRIPTION(ACPI_BUTTON_DRIVER_NAME
);
62 MODULE_LICENSE("GPL");
65 static int acpi_button_add (struct acpi_device
*device
);
66 static int acpi_button_remove (struct acpi_device
*device
, int type
);
68 static struct acpi_driver acpi_button_driver
= {
69 .name
= ACPI_BUTTON_DRIVER_NAME
,
70 .class = ACPI_BUTTON_CLASS
,
71 .ids
= "ACPI_FPB,ACPI_FSB,PNP0C0D,PNP0C0C,PNP0C0E",
73 .add
= acpi_button_add
,
74 .remove
= acpi_button_remove
,
80 struct acpi_device
*device
; /* Fixed button kludge */
85 /* --------------------------------------------------------------------------
87 -------------------------------------------------------------------------- */
95 struct acpi_button
*button
= (struct acpi_button
*) data
;
97 ACPI_FUNCTION_TRACE("acpi_button_notify");
99 if (!button
|| !button
->device
)
103 case ACPI_BUTTON_NOTIFY_STATUS
:
104 acpi_bus_generate_event(button
->device
, event
, ++button
->pushed
);
107 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
108 "Unsupported event [0x%x]\n", event
));
117 acpi_button_notify_fixed (
120 struct acpi_button
*button
= (struct acpi_button
*) data
;
122 ACPI_FUNCTION_TRACE("acpi_button_notify_fixed");
126 acpi_button_notify(button
->handle
, ACPI_BUTTON_NOTIFY_STATUS
, button
);
128 return_ACPI_STATUS(AE_OK
);
134 struct acpi_device
*device
)
137 acpi_status status
= AE_OK
;
138 struct acpi_button
*button
= NULL
;
140 ACPI_FUNCTION_TRACE("acpi_button_add");
143 return_VALUE(-EINVAL
);
145 button
= kmalloc(sizeof(struct acpi_button
), GFP_KERNEL
);
147 return_VALUE(-ENOMEM
);
148 memset(button
, 0, sizeof(struct acpi_button
));
150 button
->device
= device
;
151 button
->handle
= device
->handle
;
152 acpi_driver_data(device
) = button
;
155 * Determine the button type (via hid), as fixed-feature buttons
156 * need to be handled a bit differently than generic-space.
158 if (!strcmp(acpi_device_hid(device
), ACPI_BUTTON_HID_POWER
)) {
159 button
->type
= ACPI_BUTTON_TYPE_POWER
;
160 strcpy(acpi_device_name(device
),
161 ACPI_BUTTON_DEVICE_NAME_POWER
);
162 sprintf(acpi_device_class(device
), "%s/%s",
163 ACPI_BUTTON_CLASS
, ACPI_BUTTON_SUBCLASS_POWER
);
165 else if (!strcmp(acpi_device_hid(device
), ACPI_BUTTON_HID_POWERF
)) {
166 button
->type
= ACPI_BUTTON_TYPE_POWERF
;
167 strcpy(acpi_device_name(device
),
168 ACPI_BUTTON_DEVICE_NAME_POWERF
);
169 sprintf(acpi_device_class(device
), "%s/%s",
170 ACPI_BUTTON_CLASS
, ACPI_BUTTON_SUBCLASS_POWER
);
172 else if (!strcmp(acpi_device_hid(device
), ACPI_BUTTON_HID_SLEEP
)) {
173 button
->type
= ACPI_BUTTON_TYPE_SLEEP
;
174 strcpy(acpi_device_name(device
),
175 ACPI_BUTTON_DEVICE_NAME_SLEEP
);
176 sprintf(acpi_device_class(device
), "%s/%s",
177 ACPI_BUTTON_CLASS
, ACPI_BUTTON_SUBCLASS_SLEEP
);
179 else if (!strcmp(acpi_device_hid(device
), ACPI_BUTTON_HID_SLEEPF
)) {
180 button
->type
= ACPI_BUTTON_TYPE_SLEEPF
;
181 strcpy(acpi_device_name(device
),
182 ACPI_BUTTON_DEVICE_NAME_SLEEPF
);
183 sprintf(acpi_device_class(device
), "%s/%s",
184 ACPI_BUTTON_CLASS
, ACPI_BUTTON_SUBCLASS_SLEEP
);
186 else if (!strcmp(acpi_device_hid(device
), ACPI_BUTTON_HID_LID
)) {
187 button
->type
= ACPI_BUTTON_TYPE_LID
;
188 strcpy(acpi_device_name(device
),
189 ACPI_BUTTON_DEVICE_NAME_LID
);
190 sprintf(acpi_device_class(device
), "%s/%s",
191 ACPI_BUTTON_CLASS
, ACPI_BUTTON_SUBCLASS_LID
);
194 ACPI_DEBUG_PRINT((ACPI_DB_ERROR
, "Unsupported hid [%s]\n",
195 acpi_device_hid(device
)));
200 switch (button
->type
) {
201 case ACPI_BUTTON_TYPE_POWERF
:
202 status
= acpi_install_fixed_event_handler (
203 ACPI_EVENT_POWER_BUTTON
,
204 acpi_button_notify_fixed
,
207 case ACPI_BUTTON_TYPE_SLEEPF
:
208 status
= acpi_install_fixed_event_handler (
209 ACPI_EVENT_SLEEP_BUTTON
,
210 acpi_button_notify_fixed
,
214 status
= acpi_install_notify_handler (
222 if (ACPI_FAILURE(status
)) {
223 ACPI_DEBUG_PRINT((ACPI_DB_ERROR
,
224 "Error installing notify handler\n"));
229 if (device
->wakeup
.flags
.valid
) {
230 /* Button's GPE is run-wake GPE */
231 acpi_set_gpe_type(device
->wakeup
.gpe_device
,
232 device
->wakeup
.gpe_number
, ACPI_GPE_TYPE_WAKE_RUN
);
233 acpi_enable_gpe(device
->wakeup
.gpe_device
,
234 device
->wakeup
.gpe_number
, ACPI_NOT_ISR
);
235 device
->wakeup
.state
.enabled
= 1;
238 printk(KERN_INFO PREFIX
"%s [%s]\n",
239 acpi_device_name(device
), acpi_device_bid(device
));
246 return_VALUE(result
);
251 acpi_button_remove (struct acpi_device
*device
, int type
)
253 acpi_status status
= 0;
254 struct acpi_button
*button
= NULL
;
256 ACPI_FUNCTION_TRACE("acpi_button_remove");
258 if (!device
|| !acpi_driver_data(device
))
259 return_VALUE(-EINVAL
);
261 button
= acpi_driver_data(device
);
263 /* Unregister for device notifications. */
264 switch (button
->type
) {
265 case ACPI_BUTTON_TYPE_POWERF
:
266 status
= acpi_remove_fixed_event_handler(
267 ACPI_EVENT_POWER_BUTTON
, acpi_button_notify_fixed
);
269 case ACPI_BUTTON_TYPE_SLEEPF
:
270 status
= acpi_remove_fixed_event_handler(
271 ACPI_EVENT_SLEEP_BUTTON
, acpi_button_notify_fixed
);
274 status
= acpi_remove_notify_handler(button
->handle
,
275 ACPI_DEVICE_NOTIFY
, acpi_button_notify
);
279 if (ACPI_FAILURE(status
))
280 ACPI_DEBUG_PRINT((ACPI_DB_ERROR
,
281 "Error removing notify handler\n"));
290 acpi_button_init (void)
294 ACPI_FUNCTION_TRACE("acpi_button_init");
296 result
= acpi_bus_register_driver(&acpi_button_driver
);
298 return_VALUE(-ENODEV
);
305 acpi_button_exit (void)
307 ACPI_FUNCTION_TRACE("acpi_button_exit");
309 acpi_bus_unregister_driver(&acpi_button_driver
);
314 module_init(acpi_button_init
);
315 module_exit(acpi_button_exit
);