2 * button.c - ACPI Button Driver
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 PREFIX "ACPI: "
38 #define ACPI_BUTTON_CLASS "button"
39 #define ACPI_BUTTON_FILE_INFO "info"
40 #define ACPI_BUTTON_FILE_STATE "state"
41 #define ACPI_BUTTON_TYPE_UNKNOWN 0x00
42 #define ACPI_BUTTON_NOTIFY_STATUS 0x80
44 #define ACPI_BUTTON_SUBCLASS_POWER "power"
45 #define ACPI_BUTTON_HID_POWER "PNP0C0C"
46 #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button"
47 #define ACPI_BUTTON_TYPE_POWER 0x01
49 #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
50 #define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
51 #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button"
52 #define ACPI_BUTTON_TYPE_SLEEP 0x03
54 #define ACPI_BUTTON_SUBCLASS_LID "lid"
55 #define ACPI_BUTTON_HID_LID "PNP0C0D"
56 #define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch"
57 #define ACPI_BUTTON_TYPE_LID 0x05
59 #define _COMPONENT ACPI_BUTTON_COMPONENT
60 ACPI_MODULE_NAME("button");
62 MODULE_AUTHOR("Paul Diefenbaugh");
63 MODULE_DESCRIPTION("ACPI Button Driver");
64 MODULE_LICENSE("GPL");
66 static const struct acpi_device_id button_device_ids[] = {
67 {ACPI_BUTTON_HID_LID, 0},
68 {ACPI_BUTTON_HID_SLEEP, 0},
69 {ACPI_BUTTON_HID_SLEEPF, 0},
70 {ACPI_BUTTON_HID_POWER, 0},
71 {ACPI_BUTTON_HID_POWERF, 0},
74 MODULE_DEVICE_TABLE(acpi, button_device_ids);
76 static int acpi_button_add(struct acpi_device *device);
77 static int acpi_button_remove(struct acpi_device *device, int type);
78 static int acpi_button_resume(struct acpi_device *device);
79 static void acpi_button_notify(struct acpi_device *device, u32 event);
80 static int acpi_button_info_open_fs(struct inode *inode, struct file *file);
81 static int acpi_button_state_open_fs(struct inode *inode, struct file *file);
83 static struct acpi_driver acpi_button_driver = {
85 .class = ACPI_BUTTON_CLASS,
86 .ids = button_device_ids,
88 .add = acpi_button_add,
89 .resume = acpi_button_resume,
90 .remove = acpi_button_remove,
91 .notify = acpi_button_notify,
97 struct input_dev *input;
98 char phys[32]; /* for input device */
102 static const struct file_operations acpi_button_info_fops = {
103 .owner = THIS_MODULE,
104 .open = acpi_button_info_open_fs,
107 .release = single_release,
110 static const struct file_operations acpi_button_state_fops = {
111 .owner = THIS_MODULE,
112 .open = acpi_button_state_open_fs,
115 .release = single_release,
118 /* --------------------------------------------------------------------------
120 -------------------------------------------------------------------------- */
122 static struct proc_dir_entry *acpi_button_dir;
124 static int acpi_button_info_seq_show(struct seq_file *seq, void *offset)
126 struct acpi_device *device = seq->private;
128 seq_printf(seq, "type: %s\n",
129 acpi_device_name(device));
133 static int acpi_button_info_open_fs(struct inode *inode, struct file *file)
135 return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
138 static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
140 struct acpi_device *device = seq->private;
142 unsigned long long state;
144 status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
145 seq_printf(seq, "state: %s\n",
146 ACPI_FAILURE(status) ? "unsupported" :
147 (state ? "open" : "closed"));
151 static int acpi_button_state_open_fs(struct inode *inode, struct file *file)
153 return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
156 static struct proc_dir_entry *acpi_power_dir;
157 static struct proc_dir_entry *acpi_sleep_dir;
158 static struct proc_dir_entry *acpi_lid_dir;
160 static int acpi_button_add_fs(struct acpi_device *device)
162 struct acpi_button *button = acpi_driver_data(device);
163 struct proc_dir_entry *entry = NULL;
165 switch (button->type) {
166 case ACPI_BUTTON_TYPE_POWER:
168 acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
170 entry = acpi_power_dir;
172 case ACPI_BUTTON_TYPE_SLEEP:
174 acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
176 entry = acpi_sleep_dir;
178 case ACPI_BUTTON_TYPE_LID:
180 acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
182 entry = acpi_lid_dir;
189 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
190 if (!acpi_device_dir(device))
194 entry = proc_create_data(ACPI_BUTTON_FILE_INFO,
195 S_IRUGO, acpi_device_dir(device),
196 &acpi_button_info_fops, device);
200 /* show lid state [R] */
201 if (button->type == ACPI_BUTTON_TYPE_LID) {
202 entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
203 S_IRUGO, acpi_device_dir(device),
204 &acpi_button_state_fops, device);
212 static int acpi_button_remove_fs(struct acpi_device *device)
214 struct acpi_button *button = acpi_driver_data(device);
216 if (acpi_device_dir(device)) {
217 if (button->type == ACPI_BUTTON_TYPE_LID)
218 remove_proc_entry(ACPI_BUTTON_FILE_STATE,
219 acpi_device_dir(device));
220 remove_proc_entry(ACPI_BUTTON_FILE_INFO,
221 acpi_device_dir(device));
223 remove_proc_entry(acpi_device_bid(device),
224 acpi_device_dir(device)->parent);
225 acpi_device_dir(device) = NULL;
231 /* --------------------------------------------------------------------------
233 -------------------------------------------------------------------------- */
234 static int acpi_lid_send_state(struct acpi_device *device)
236 struct acpi_button *button = acpi_driver_data(device);
237 unsigned long long state;
240 status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
241 if (ACPI_FAILURE(status))
244 /* input layer checks if event is redundant */
245 input_report_switch(button->input, SW_LID, !state);
246 input_sync(button->input);
250 static void acpi_button_notify(struct acpi_device *device, u32 event)
252 struct acpi_button *button = acpi_driver_data(device);
253 struct input_dev *input;
256 case ACPI_FIXED_HARDWARE_EVENT:
257 event = ACPI_BUTTON_NOTIFY_STATUS;
259 case ACPI_BUTTON_NOTIFY_STATUS:
260 input = button->input;
261 if (button->type == ACPI_BUTTON_TYPE_LID) {
262 acpi_lid_send_state(device);
264 int keycode = test_bit(KEY_SLEEP, input->keybit) ?
265 KEY_SLEEP : KEY_POWER;
267 input_report_key(input, keycode, 1);
269 input_report_key(input, keycode, 0);
273 acpi_bus_generate_proc_event(device, event, ++button->pushed);
276 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
277 "Unsupported event [0x%x]\n", event));
282 static int acpi_button_resume(struct acpi_device *device)
284 struct acpi_button *button = acpi_driver_data(device);
286 if (button->type == ACPI_BUTTON_TYPE_LID)
287 return acpi_lid_send_state(device);
291 static int acpi_button_add(struct acpi_device *device)
293 struct acpi_button *button;
294 struct input_dev *input;
295 char *hid, *name, *class;
298 button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
302 device->driver_data = button;
304 button->input = input = input_allocate_device();
307 goto err_free_button;
310 hid = acpi_device_hid(device);
311 name = acpi_device_name(device);
312 class = acpi_device_class(device);
314 if (!strcmp(hid, ACPI_BUTTON_HID_POWER) ||
315 !strcmp(hid, ACPI_BUTTON_HID_POWERF)) {
316 button->type = ACPI_BUTTON_TYPE_POWER;
317 strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER);
318 sprintf(class, "%s/%s",
319 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
320 } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) ||
321 !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) {
322 button->type = ACPI_BUTTON_TYPE_SLEEP;
323 strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP);
324 sprintf(class, "%s/%s",
325 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
326 } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) {
327 button->type = ACPI_BUTTON_TYPE_LID;
328 strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID);
329 sprintf(class, "%s/%s",
330 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
332 printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid);
337 error = acpi_button_add_fs(device);
341 snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);
344 input->phys = button->phys;
345 input->id.bustype = BUS_HOST;
346 input->id.product = button->type;
347 input->dev.parent = &device->dev;
349 switch (button->type) {
350 case ACPI_BUTTON_TYPE_POWER:
351 input->evbit[0] = BIT_MASK(EV_KEY);
352 set_bit(KEY_POWER, input->keybit);
355 case ACPI_BUTTON_TYPE_SLEEP:
356 input->evbit[0] = BIT_MASK(EV_KEY);
357 set_bit(KEY_SLEEP, input->keybit);
360 case ACPI_BUTTON_TYPE_LID:
361 input->evbit[0] = BIT_MASK(EV_SW);
362 set_bit(SW_LID, input->swbit);
366 error = input_register_device(input);
369 if (button->type == ACPI_BUTTON_TYPE_LID)
370 acpi_lid_send_state(device);
372 if (device->wakeup.flags.valid) {
373 /* Button's GPE is run-wake GPE */
374 acpi_set_gpe_type(device->wakeup.gpe_device,
375 device->wakeup.gpe_number,
376 ACPI_GPE_TYPE_WAKE_RUN);
377 acpi_enable_gpe(device->wakeup.gpe_device,
378 device->wakeup.gpe_number);
379 device->wakeup.state.enabled = 1;
382 printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device));
386 acpi_button_remove_fs(device);
388 input_free_device(input);
394 static int acpi_button_remove(struct acpi_device *device, int type)
396 struct acpi_button *button = acpi_driver_data(device);
398 acpi_button_remove_fs(device);
399 input_unregister_device(button->input);
404 static int __init acpi_button_init(void)
408 acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
409 if (!acpi_button_dir)
412 result = acpi_bus_register_driver(&acpi_button_driver);
414 remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
421 static void __exit acpi_button_exit(void)
423 acpi_bus_unregister_driver(&acpi_button_driver);
426 remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
428 remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
430 remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
431 remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
434 module_init(acpi_button_init);
435 module_exit(acpi_button_exit);