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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Bjorn Helgaas50a4da82009-04-08 15:39:38 +00002 * button.c - ACPI Button Driver
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
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>
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -040029#include <linux/types.h>
30#include <linux/proc_fs.h>
31#include <linux/seq_file.h>
Dmitry Torokhovc0968f02006-11-09 00:40:13 -050032#include <linux/input.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090033#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <acpi/acpi_bus.h>
35#include <acpi/acpi_drivers.h>
36
Len Browna192a952009-07-28 16:45:54 -040037#define PREFIX "ACPI: "
38
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#define ACPI_BUTTON_CLASS "button"
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -040040#define ACPI_BUTTON_FILE_INFO "info"
41#define ACPI_BUTTON_FILE_STATE "state"
42#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#define ACPI_BUTTON_NOTIFY_STATUS 0x80
44
45#define ACPI_BUTTON_SUBCLASS_POWER "power"
Len Brown4be44fc2005-08-05 00:44:28 -040046#define ACPI_BUTTON_HID_POWER "PNP0C0C"
Bjorn Helgaasd68b5972009-04-08 15:40:04 +000047#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button"
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#define ACPI_BUTTON_TYPE_POWER 0x01
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
50#define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
51#define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
Bjorn Helgaasd68b5972009-04-08 15:40:04 +000052#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button"
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#define ACPI_BUTTON_TYPE_SLEEP 0x03
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
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
Len Brownf52fd662007-02-12 22:42:12 -050061ACPI_MODULE_NAME("button");
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
Dmitry Torokhovc0968f02006-11-09 00:40:13 -050063MODULE_AUTHOR("Paul Diefenbaugh");
Len Brown7cda93e2007-02-12 23:50:02 -050064MODULE_DESCRIPTION("ACPI Button Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -070065MODULE_LICENSE("GPL");
66
Thomas Renninger1ba90e32007-07-23 14:44:41 +020067static 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
Len Brown4be44fc2005-08-05 00:44:28 -040077static int acpi_button_add(struct acpi_device *device);
78static int acpi_button_remove(struct acpi_device *device, int type);
Alexey Starikovskiy23de5d92007-10-22 14:18:18 +040079static int acpi_button_resume(struct acpi_device *device);
Bjorn Helgaas373cfc32009-03-30 17:48:18 +000080static void acpi_button_notify(struct acpi_device *device, u32 event);
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
82static struct acpi_driver acpi_button_driver = {
Len Brownc2b6705b2007-02-12 23:33:40 -050083 .name = "button",
Len Brown4be44fc2005-08-05 00:44:28 -040084 .class = ACPI_BUTTON_CLASS,
Thomas Renninger1ba90e32007-07-23 14:44:41 +020085 .ids = button_device_ids,
Len Brown4be44fc2005-08-05 00:44:28 -040086 .ops = {
87 .add = acpi_button_add,
Alexey Starikovskiy23de5d92007-10-22 14:18:18 +040088 .resume = acpi_button_resume,
Len Brown4be44fc2005-08-05 00:44:28 -040089 .remove = acpi_button_remove,
Bjorn Helgaas373cfc32009-03-30 17:48:18 +000090 .notify = acpi_button_notify,
Dmitry Torokhovc0968f02006-11-09 00:40:13 -050091 },
Linus Torvalds1da177e2005-04-16 15:20:36 -070092};
93
94struct acpi_button {
Dmitry Torokhovc0968f02006-11-09 00:40:13 -050095 unsigned int type;
96 struct input_dev *input;
97 char phys[32]; /* for input device */
Len Brown4be44fc2005-08-05 00:44:28 -040098 unsigned long pushed;
Rafael J. Wysockic19f9a82011-02-08 23:41:13 +010099 bool wakeup_enabled;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100};
101
Jesse Barnes7e127152009-09-10 15:28:02 -0700102static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier);
103static struct acpi_device *lid_device;
104
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400105/* --------------------------------------------------------------------------
106 FS Interface (/proc)
107 -------------------------------------------------------------------------- */
108
Len Brown4be44fc2005-08-05 00:44:28 -0400109static struct proc_dir_entry *acpi_button_dir;
Zhang Rui912b7422011-03-23 10:21:40 +0800110static struct proc_dir_entry *acpi_lid_dir;
Len Brown4be44fc2005-08-05 00:44:28 -0400111
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400112static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
113{
Bjorn Helgaas106c19e2009-04-08 15:39:59 +0000114 struct acpi_device *device = seq->private;
Len Brown4be44fc2005-08-05 00:44:28 -0400115 acpi_status status;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400116 unsigned long long state;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400117
Bjorn Helgaas106c19e2009-04-08 15:39:59 +0000118 status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500119 seq_printf(seq, "state: %s\n",
120 ACPI_FAILURE(status) ? "unsupported" :
121 (state ? "open" : "closed"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400122 return 0;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400123}
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
Zhang Rui912b7422011-03-23 10:21:40 +0800130static 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};
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400137
Len Brown4be44fc2005-08-05 00:44:28 -0400138static int acpi_button_add_fs(struct acpi_device *device)
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400139{
Bjorn Helgaas1bce8112009-04-08 15:39:49 +0000140 struct acpi_button *button = acpi_driver_data(device);
Len Brown4be44fc2005-08-05 00:44:28 -0400141 struct proc_dir_entry *entry = NULL;
Zhang Rui912b7422011-03-23 10:21:40 +0800142 int ret = 0;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400143
Zhang Rui912b7422011-03-23 10:21:40 +0800144 /* 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;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400151 }
152
Zhang Rui912b7422011-03-23 10:21:40 +0800153 /* create /proc/acpi/button */
154 acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
155 if (!acpi_button_dir)
Patrick Mocheld550d982006-06-27 00:41:40 -0400156 return -ENODEV;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400157
Zhang Rui912b7422011-03-23 10:21:40 +0800158 /* 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 }
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400164
Zhang Rui912b7422011-03-23 10:21:40 +0800165 /* 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,
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700174 S_IRUGO, acpi_device_dir(device),
Zhang Rui912b7422011-03-23 10:21:40 +0800175 &acpi_button_state_fops, device);
176 if (!entry) {
177 ret = -ENODEV;
178 goto remove_dev_dir;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400179 }
180
Zhang Rui912b7422011-03-23 10:21:40 +0800181done:
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;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400193}
194
Len Brown4be44fc2005-08-05 00:44:28 -0400195static int acpi_button_remove_fs(struct acpi_device *device)
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400196{
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500197 struct acpi_button *button = acpi_driver_data(device);
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400198
Zhang Rui912b7422011-03-23 10:21:40 +0800199 if (button->type != ACPI_BUTTON_TYPE_LID)
200 return 0;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400201
Zhang Rui912b7422011-03-23 10:21:40 +0800202 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);
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400209
Patrick Mocheld550d982006-06-27 00:41:40 -0400210 return 0;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400211}
212
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213/* --------------------------------------------------------------------------
214 Driver Interface
215 -------------------------------------------------------------------------- */
Jesse Barnes7e127152009-09-10 15:28:02 -0700216int 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
Jesse Barnes2c907b72009-10-07 14:39:46 -0700233 if (!lid_device)
234 return -ENODEV;
235
Jesse Barnes7e127152009-09-10 15:28:02 -0700236 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
Bjorn Helgaas106c19e2009-04-08 15:39:59 +0000245static int acpi_lid_send_state(struct acpi_device *device)
Alexey Starikovskiy23de5d92007-10-22 14:18:18 +0400246{
Bjorn Helgaas106c19e2009-04-08 15:39:59 +0000247 struct acpi_button *button = acpi_driver_data(device);
Matthew Wilcox27663c52008-10-10 02:22:59 -0400248 unsigned long long state;
Alexey Starikovskiy23de5d92007-10-22 14:18:18 +0400249 acpi_status status;
Jesse Barnes7e127152009-09-10 15:28:02 -0700250 int ret;
Alexey Starikovskiy23de5d92007-10-22 14:18:18 +0400251
Bjorn Helgaas106c19e2009-04-08 15:39:59 +0000252 status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
Alexey Starikovskiy23de5d92007-10-22 14:18:18 +0400253 if (ACPI_FAILURE(status))
254 return -ENODEV;
Bjorn Helgaas50a4da82009-04-08 15:39:38 +0000255
Alexey Starikovskiy23de5d92007-10-22 14:18:18 +0400256 /* input layer checks if event is redundant */
257 input_report_switch(button->input, SW_LID, !state);
Guillem Joverdf316e92008-10-24 00:28:33 +0300258 input_sync(button->input);
Jesse Barnes7e127152009-09-10 15:28:02 -0700259
Rafael J. Wysocki1f835112011-01-06 23:36:01 +0100260 if (state)
261 pm_wakeup_event(&device->dev, 0);
262
Jesse Barnes7e127152009-09-10 15:28:02 -0700263 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);
Zhao Yakui13c199c2009-12-15 22:01:57 +0800267 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 }
Jesse Barnes7e127152009-09-10 15:28:02 -0700274 return ret;
Alexey Starikovskiy23de5d92007-10-22 14:18:18 +0400275}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276
Bjorn Helgaas373cfc32009-03-30 17:48:18 +0000277static void acpi_button_notify(struct acpi_device *device, u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278{
Bjorn Helgaas373cfc32009-03-30 17:48:18 +0000279 struct acpi_button *button = acpi_driver_data(device);
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500280 struct input_dev *input;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 switch (event) {
Bjorn Helgaas373cfc32009-03-30 17:48:18 +0000283 case ACPI_FIXED_HARDWARE_EVENT:
284 event = ACPI_BUTTON_NOTIFY_STATUS;
285 /* fall through */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 case ACPI_BUTTON_NOTIFY_STATUS:
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500287 input = button->input;
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500288 if (button->type == ACPI_BUTTON_TYPE_LID) {
Bjorn Helgaas106c19e2009-04-08 15:39:59 +0000289 acpi_lid_send_state(device);
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500290 } 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);
Guillem Joverdf316e92008-10-24 00:28:33 +0300297 input_sync(input);
Rafael J. Wysocki1f835112011-01-06 23:36:01 +0100298
299 pm_wakeup_event(&device->dev, 0);
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500300 }
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500301
Bjorn Helgaas106c19e2009-04-08 15:39:59 +0000302 acpi_bus_generate_proc_event(device, event, ++button->pushed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 break;
304 default:
305 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Len Brown4be44fc2005-08-05 00:44:28 -0400306 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 break;
308 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309}
310
Alexey Starikovskiy23de5d92007-10-22 14:18:18 +0400311static int acpi_button_resume(struct acpi_device *device)
312{
Bjorn Helgaas1bce8112009-04-08 15:39:49 +0000313 struct acpi_button *button = acpi_driver_data(device);
Bjorn Helgaas50a4da82009-04-08 15:39:38 +0000314
Bjorn Helgaase2fb9752009-04-08 15:39:43 +0000315 if (button->type == ACPI_BUTTON_TYPE_LID)
Bjorn Helgaas106c19e2009-04-08 15:39:59 +0000316 return acpi_lid_send_state(device);
Alexey Starikovskiy23de5d92007-10-22 14:18:18 +0400317 return 0;
318}
319
Len Brown4be44fc2005-08-05 00:44:28 -0400320static int acpi_button_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321{
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500322 struct acpi_button *button;
323 struct input_dev *input;
Thomas Renninger620e1122010-10-01 10:54:00 +0200324 const char *hid = acpi_device_hid(device);
325 char *name, *class;
Bjorn Helgaas1bce8112009-04-08 15:39:49 +0000326 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500328 button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 if (!button)
Patrick Mocheld550d982006-06-27 00:41:40 -0400330 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331
Pavel Machekdb89b4f2008-09-22 14:37:34 -0700332 device->driver_data = button;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500334 button->input = input = input_allocate_device();
335 if (!input) {
336 error = -ENOMEM;
337 goto err_free_button;
338 }
339
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000340 name = acpi_device_name(device);
341 class = acpi_device_class(device);
342
Bjorn Helgaasd68b5972009-04-08 15:40:04 +0000343 if (!strcmp(hid, ACPI_BUTTON_HID_POWER) ||
344 !strcmp(hid, ACPI_BUTTON_HID_POWERF)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 button->type = ACPI_BUTTON_TYPE_POWER;
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000346 strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER);
347 sprintf(class, "%s/%s",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
Bjorn Helgaasd68b5972009-04-08 15:40:04 +0000349 } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) ||
350 !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 button->type = ACPI_BUTTON_TYPE_SLEEP;
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000352 strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP);
353 sprintf(class, "%s/%s",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000355 } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 button->type = ACPI_BUTTON_TYPE_LID;
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000357 strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID);
358 sprintf(class, "%s/%s",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
Len Brown4be44fc2005-08-05 00:44:28 -0400360 } else {
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000361 printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid);
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500362 error = -ENODEV;
363 goto err_free_input;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 }
365
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500366 error = acpi_button_add_fs(device);
367 if (error)
368 goto err_free_input;
369
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000370 snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500371
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000372 input->name = name;
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500373 input->phys = button->phys;
374 input->id.bustype = BUS_HOST;
375 input->id.product = button->type;
Andrey Borzenkov3b34e522008-03-04 15:06:35 -0800376 input->dev.parent = &device->dev;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400377
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 switch (button->type) {
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500379 case ACPI_BUTTON_TYPE_POWER:
Jiri Slaby7b19ada2007-10-18 23:40:32 -0700380 input->evbit[0] = BIT_MASK(EV_KEY);
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500381 set_bit(KEY_POWER, input->keybit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 break;
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500383
384 case ACPI_BUTTON_TYPE_SLEEP:
Jiri Slaby7b19ada2007-10-18 23:40:32 -0700385 input->evbit[0] = BIT_MASK(EV_KEY);
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500386 set_bit(KEY_SLEEP, input->keybit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 break;
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500388
389 case ACPI_BUTTON_TYPE_LID:
Jiri Slaby7b19ada2007-10-18 23:40:32 -0700390 input->evbit[0] = BIT_MASK(EV_SW);
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500391 set_bit(SW_LID, input->swbit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 break;
393 }
394
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500395 error = input_register_device(input);
396 if (error)
Bjorn Helgaas373cfc32009-03-30 17:48:18 +0000397 goto err_remove_fs;
Jesse Barnes7e127152009-09-10 15:28:02 -0700398 if (button->type == ACPI_BUTTON_TYPE_LID) {
Bjorn Helgaas106c19e2009-04-08 15:39:59 +0000399 acpi_lid_send_state(device);
Jesse Barnes7e127152009-09-10 15:28:02 -0700400 /*
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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
407 if (device->wakeup.flags.valid) {
408 /* Button's GPE is run-wake GPE */
Len Brown4be44fc2005-08-05 00:44:28 -0400409 acpi_enable_gpe(device->wakeup.gpe_device,
Rafael J. Wysockia44061a2010-07-01 10:11:45 +0800410 device->wakeup.gpe_number);
Rafael J. Wysockic19f9a82011-02-08 23:41:13 +0100411 if (!device_may_wakeup(&device->dev)) {
412 device_set_wakeup_enable(&device->dev, true);
413 button->wakeup_enabled = true;
414 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 }
416
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000417 printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device));
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500418 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500420 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427}
428
Len Brown4be44fc2005-08-05 00:44:28 -0400429static int acpi_button_remove(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430{
Bjorn Helgaas1bce8112009-04-08 15:39:49 +0000431 struct acpi_button *button = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432
Rafael J. Wysocki9630bdd2010-02-17 23:41:07 +0100433 if (device->wakeup.flags.valid) {
434 acpi_disable_gpe(device->wakeup.gpe_device,
Rafael J. Wysockia44061a2010-07-01 10:11:45 +0800435 device->wakeup.gpe_number);
Rafael J. Wysockic19f9a82011-02-08 23:41:13 +0100436 if (button->wakeup_enabled)
437 device_set_wakeup_enable(&device->dev, false);
Rafael J. Wysocki9630bdd2010-02-17 23:41:07 +0100438 }
439
Len Brown4be44fc2005-08-05 00:44:28 -0400440 acpi_button_remove_fs(device);
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500441 input_unregister_device(button->input);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 kfree(button);
Patrick Mocheld550d982006-06-27 00:41:40 -0400443 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444}
445
Len Brown4be44fc2005-08-05 00:44:28 -0400446static int __init acpi_button_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447{
Zhang Rui912b7422011-03-23 10:21:40 +0800448 return acpi_bus_register_driver(&acpi_button_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449}
450
Len Brown4be44fc2005-08-05 00:44:28 -0400451static void __exit acpi_button_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 acpi_bus_unregister_driver(&acpi_button_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454}
455
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456module_init(acpi_button_init);
457module_exit(acpi_button_exit);