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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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070019 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
20 */
21
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/init.h>
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -040025#include <linux/types.h>
26#include <linux/proc_fs.h>
27#include <linux/seq_file.h>
Dmitry Torokhovc0968f02006-11-09 00:40:13 -050028#include <linux/input.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090029#include <linux/slab.h>
Lv Zheng8b484632013-12-03 08:49:16 +080030#include <linux/acpi.h>
Andy Shevchenko6270da62013-03-11 09:17:04 +000031#include <acpi/button.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
Len Browna192a952009-07-28 16:45:54 -040033#define PREFIX "ACPI: "
34
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#define ACPI_BUTTON_CLASS "button"
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -040036#define ACPI_BUTTON_FILE_INFO "info"
37#define ACPI_BUTTON_FILE_STATE "state"
38#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#define ACPI_BUTTON_NOTIFY_STATUS 0x80
40
41#define ACPI_BUTTON_SUBCLASS_POWER "power"
Len Brown4be44fc2005-08-05 00:44:28 -040042#define ACPI_BUTTON_HID_POWER "PNP0C0C"
Bjorn Helgaasd68b5972009-04-08 15:40:04 +000043#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button"
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#define ACPI_BUTTON_TYPE_POWER 0x01
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
46#define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
47#define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
Bjorn Helgaasd68b5972009-04-08 15:40:04 +000048#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button"
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#define ACPI_BUTTON_TYPE_SLEEP 0x03
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
51#define ACPI_BUTTON_SUBCLASS_LID "lid"
52#define ACPI_BUTTON_HID_LID "PNP0C0D"
53#define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch"
54#define ACPI_BUTTON_TYPE_LID 0x05
55
Lv Zheng3540c322016-06-01 18:10:48 +080056#define ACPI_BUTTON_LID_INIT_IGNORE 0x00
57#define ACPI_BUTTON_LID_INIT_OPEN 0x01
58#define ACPI_BUTTON_LID_INIT_METHOD 0x02
59
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#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);
Rafael J. Wysocki51fac832013-01-24 00:24:48 +010078static int acpi_button_remove(struct acpi_device *device);
Bjorn Helgaas373cfc32009-03-30 17:48:18 +000079static void acpi_button_notify(struct acpi_device *device, u32 event);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080
Rafael J. Wysocki90692402012-08-09 23:00:02 +020081#ifdef CONFIG_PM_SLEEP
Rafael J. Wysockie71eeb22014-07-23 00:59:04 +020082static int acpi_button_suspend(struct device *dev);
Rafael J. Wysocki1be532d2012-06-27 23:26:51 +020083static int acpi_button_resume(struct device *dev);
Shuah Khan2de9fd12014-02-12 20:19:07 -070084#else
Rafael J. Wysockie71eeb22014-07-23 00:59:04 +020085#define acpi_button_suspend NULL
Shuah Khan2de9fd12014-02-12 20:19:07 -070086#define acpi_button_resume NULL
Rafael J. Wysocki90692402012-08-09 23:00:02 +020087#endif
Rafael J. Wysockie71eeb22014-07-23 00:59:04 +020088static SIMPLE_DEV_PM_OPS(acpi_button_pm, acpi_button_suspend, acpi_button_resume);
Rafael J. Wysocki1be532d2012-06-27 23:26:51 +020089
Linus Torvalds1da177e2005-04-16 15:20:36 -070090static struct acpi_driver acpi_button_driver = {
Len Brownc2b67052007-02-12 23:33:40 -050091 .name = "button",
Len Brown4be44fc2005-08-05 00:44:28 -040092 .class = ACPI_BUTTON_CLASS,
Thomas Renninger1ba90e32007-07-23 14:44:41 +020093 .ids = button_device_ids,
Len Brown4be44fc2005-08-05 00:44:28 -040094 .ops = {
95 .add = acpi_button_add,
96 .remove = acpi_button_remove,
Bjorn Helgaas373cfc32009-03-30 17:48:18 +000097 .notify = acpi_button_notify,
Dmitry Torokhovc0968f02006-11-09 00:40:13 -050098 },
Rafael J. Wysocki1be532d2012-06-27 23:26:51 +020099 .drv.pm = &acpi_button_pm,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100};
101
102struct acpi_button {
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500103 unsigned int type;
104 struct input_dev *input;
105 char phys[32]; /* for input device */
Len Brown4be44fc2005-08-05 00:44:28 -0400106 unsigned long pushed;
Rafael J. Wysockie71eeb22014-07-23 00:59:04 +0200107 bool suspended;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108};
109
Jesse Barnes7e127152009-09-10 15:28:02 -0700110static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier);
111static struct acpi_device *lid_device;
Lv Zheng3540c322016-06-01 18:10:48 +0800112static u8 lid_init_state = ACPI_BUTTON_LID_INIT_METHOD;
Jesse Barnes7e127152009-09-10 15:28:02 -0700113
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400114/* --------------------------------------------------------------------------
115 FS Interface (/proc)
116 -------------------------------------------------------------------------- */
117
Len Brown4be44fc2005-08-05 00:44:28 -0400118static struct proc_dir_entry *acpi_button_dir;
Zhang Rui912b7422011-03-23 10:21:40 +0800119static struct proc_dir_entry *acpi_lid_dir;
Len Brown4be44fc2005-08-05 00:44:28 -0400120
Lv Zhengee7e2262016-06-01 18:10:42 +0800121static int acpi_lid_evaluate_state(struct acpi_device *device)
122{
123 unsigned long long lid_state;
124 acpi_status status;
125
126 status = acpi_evaluate_integer(device->handle, "_LID", NULL, &lid_state);
127 if (ACPI_FAILURE(status))
128 return -ENODEV;
129
130 return lid_state ? 1 : 0;
131}
132
133static int acpi_lid_notify_state(struct acpi_device *device, int state)
134{
135 struct acpi_button *button = acpi_driver_data(device);
136 int ret;
137
138 /* input layer checks if event is redundant */
139 input_report_switch(button->input, SW_LID, !state);
140 input_sync(button->input);
141
142 if (state)
143 pm_wakeup_event(&device->dev, 0);
144
145 ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device);
146 if (ret == NOTIFY_DONE)
147 ret = blocking_notifier_call_chain(&acpi_lid_notifier, state,
148 device);
149 if (ret == NOTIFY_DONE || ret == NOTIFY_OK) {
150 /*
151 * It is also regarded as success if the notifier_chain
152 * returns NOTIFY_OK or NOTIFY_DONE.
153 */
154 ret = 0;
155 }
156 return ret;
157}
158
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400159static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
160{
Bjorn Helgaas106c19e2009-04-08 15:39:59 +0000161 struct acpi_device *device = seq->private;
Lv Zhengee7e2262016-06-01 18:10:42 +0800162 int state;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400163
Lv Zhengee7e2262016-06-01 18:10:42 +0800164 state = acpi_lid_evaluate_state(device);
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500165 seq_printf(seq, "state: %s\n",
Lv Zhengee7e2262016-06-01 18:10:42 +0800166 state < 0 ? "unsupported" : (state ? "open" : "closed"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400167 return 0;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400168}
169
170static int acpi_button_state_open_fs(struct inode *inode, struct file *file)
171{
Al Virod9dda782013-03-31 18:16:14 -0400172 return single_open(file, acpi_button_state_seq_show, PDE_DATA(inode));
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400173}
174
Zhang Rui912b7422011-03-23 10:21:40 +0800175static const struct file_operations acpi_button_state_fops = {
176 .owner = THIS_MODULE,
177 .open = acpi_button_state_open_fs,
178 .read = seq_read,
179 .llseek = seq_lseek,
180 .release = single_release,
181};
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400182
Len Brown4be44fc2005-08-05 00:44:28 -0400183static int acpi_button_add_fs(struct acpi_device *device)
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400184{
Bjorn Helgaas1bce8112009-04-08 15:39:49 +0000185 struct acpi_button *button = acpi_driver_data(device);
Len Brown4be44fc2005-08-05 00:44:28 -0400186 struct proc_dir_entry *entry = NULL;
Zhang Rui912b7422011-03-23 10:21:40 +0800187 int ret = 0;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400188
Zhang Rui912b7422011-03-23 10:21:40 +0800189 /* procfs I/F for ACPI lid device only */
190 if (button->type != ACPI_BUTTON_TYPE_LID)
191 return 0;
192
193 if (acpi_button_dir || acpi_lid_dir) {
194 printk(KERN_ERR PREFIX "More than one Lid device found!\n");
195 return -EEXIST;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400196 }
197
Zhang Rui912b7422011-03-23 10:21:40 +0800198 /* create /proc/acpi/button */
199 acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
200 if (!acpi_button_dir)
Patrick Mocheld550d982006-06-27 00:41:40 -0400201 return -ENODEV;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400202
Zhang Rui912b7422011-03-23 10:21:40 +0800203 /* create /proc/acpi/button/lid */
204 acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
205 if (!acpi_lid_dir) {
206 ret = -ENODEV;
207 goto remove_button_dir;
208 }
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400209
Zhang Rui912b7422011-03-23 10:21:40 +0800210 /* create /proc/acpi/button/lid/LID/ */
211 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir);
212 if (!acpi_device_dir(device)) {
213 ret = -ENODEV;
214 goto remove_lid_dir;
215 }
216
217 /* create /proc/acpi/button/lid/LID/state */
218 entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700219 S_IRUGO, acpi_device_dir(device),
Zhang Rui912b7422011-03-23 10:21:40 +0800220 &acpi_button_state_fops, device);
221 if (!entry) {
222 ret = -ENODEV;
223 goto remove_dev_dir;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400224 }
225
Zhang Rui912b7422011-03-23 10:21:40 +0800226done:
227 return ret;
228
229remove_dev_dir:
230 remove_proc_entry(acpi_device_bid(device),
231 acpi_lid_dir);
232 acpi_device_dir(device) = NULL;
233remove_lid_dir:
234 remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
Benjamin Tissoirese370cc82016-07-29 17:08:41 +0200235 acpi_lid_dir = NULL;
Zhang Rui912b7422011-03-23 10:21:40 +0800236remove_button_dir:
237 remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
Benjamin Tissoirese370cc82016-07-29 17:08:41 +0200238 acpi_button_dir = NULL;
Zhang Rui912b7422011-03-23 10:21:40 +0800239 goto done;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400240}
241
Len Brown4be44fc2005-08-05 00:44:28 -0400242static int acpi_button_remove_fs(struct acpi_device *device)
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400243{
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500244 struct acpi_button *button = acpi_driver_data(device);
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400245
Zhang Rui912b7422011-03-23 10:21:40 +0800246 if (button->type != ACPI_BUTTON_TYPE_LID)
247 return 0;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400248
Zhang Rui912b7422011-03-23 10:21:40 +0800249 remove_proc_entry(ACPI_BUTTON_FILE_STATE,
250 acpi_device_dir(device));
251 remove_proc_entry(acpi_device_bid(device),
252 acpi_lid_dir);
253 acpi_device_dir(device) = NULL;
254 remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
Benjamin Tissoirese370cc82016-07-29 17:08:41 +0200255 acpi_lid_dir = NULL;
Zhang Rui912b7422011-03-23 10:21:40 +0800256 remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
Benjamin Tissoirese370cc82016-07-29 17:08:41 +0200257 acpi_button_dir = NULL;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400258
Patrick Mocheld550d982006-06-27 00:41:40 -0400259 return 0;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400260}
261
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262/* --------------------------------------------------------------------------
263 Driver Interface
264 -------------------------------------------------------------------------- */
Jesse Barnes7e127152009-09-10 15:28:02 -0700265int acpi_lid_notifier_register(struct notifier_block *nb)
266{
267 return blocking_notifier_chain_register(&acpi_lid_notifier, nb);
268}
269EXPORT_SYMBOL(acpi_lid_notifier_register);
270
271int acpi_lid_notifier_unregister(struct notifier_block *nb)
272{
273 return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb);
274}
275EXPORT_SYMBOL(acpi_lid_notifier_unregister);
276
277int acpi_lid_open(void)
278{
Jesse Barnes2c907b72009-10-07 14:39:46 -0700279 if (!lid_device)
280 return -ENODEV;
281
Lv Zhengee7e2262016-06-01 18:10:42 +0800282 return acpi_lid_evaluate_state(lid_device);
Jesse Barnes7e127152009-09-10 15:28:02 -0700283}
284EXPORT_SYMBOL(acpi_lid_open);
285
Lv Zhengee7e2262016-06-01 18:10:42 +0800286static int acpi_lid_update_state(struct acpi_device *device)
Alexey Starikovskiy23de5d92007-10-22 14:18:18 +0400287{
Lv Zhengee7e2262016-06-01 18:10:42 +0800288 int state;
Alexey Starikovskiy23de5d92007-10-22 14:18:18 +0400289
Lv Zhengee7e2262016-06-01 18:10:42 +0800290 state = acpi_lid_evaluate_state(device);
291 if (state < 0)
292 return state;
Bjorn Helgaas50a4da82009-04-08 15:39:38 +0000293
Lv Zhengee7e2262016-06-01 18:10:42 +0800294 return acpi_lid_notify_state(device, state);
Alexey Starikovskiy23de5d92007-10-22 14:18:18 +0400295}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
Lv Zheng3540c322016-06-01 18:10:48 +0800297static void acpi_lid_initialize_state(struct acpi_device *device)
298{
299 switch (lid_init_state) {
300 case ACPI_BUTTON_LID_INIT_OPEN:
301 (void)acpi_lid_notify_state(device, 1);
302 break;
303 case ACPI_BUTTON_LID_INIT_METHOD:
304 (void)acpi_lid_update_state(device);
305 break;
306 case ACPI_BUTTON_LID_INIT_IGNORE:
307 default:
308 break;
309 }
310}
311
Bjorn Helgaas373cfc32009-03-30 17:48:18 +0000312static void acpi_button_notify(struct acpi_device *device, u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313{
Bjorn Helgaas373cfc32009-03-30 17:48:18 +0000314 struct acpi_button *button = acpi_driver_data(device);
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500315 struct input_dev *input;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 switch (event) {
Bjorn Helgaas373cfc32009-03-30 17:48:18 +0000318 case ACPI_FIXED_HARDWARE_EVENT:
319 event = ACPI_BUTTON_NOTIFY_STATUS;
320 /* fall through */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 case ACPI_BUTTON_NOTIFY_STATUS:
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500322 input = button->input;
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500323 if (button->type == ACPI_BUTTON_TYPE_LID) {
Lv Zhengee7e2262016-06-01 18:10:42 +0800324 acpi_lid_update_state(device);
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500325 } else {
Rafael J. Wysockie71eeb22014-07-23 00:59:04 +0200326 int keycode;
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500327
Rafael J. Wysockie71eeb22014-07-23 00:59:04 +0200328 pm_wakeup_event(&device->dev, 0);
329 if (button->suspended)
330 break;
331
332 keycode = test_bit(KEY_SLEEP, input->keybit) ?
333 KEY_SLEEP : KEY_POWER;
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500334 input_report_key(input, keycode, 1);
335 input_sync(input);
336 input_report_key(input, keycode, 0);
Guillem Joverdf316e92008-10-24 00:28:33 +0300337 input_sync(input);
Rafael J. Wysocki1f835112011-01-06 23:36:01 +0100338
Lan Tianyu0bf63682014-03-15 13:37:13 -0400339 acpi_bus_generate_netlink_event(
340 device->pnp.device_class,
341 dev_name(&device->dev),
342 event, ++button->pushed);
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500343 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 break;
345 default:
346 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Len Brown4be44fc2005-08-05 00:44:28 -0400347 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 break;
349 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350}
351
Rafael J. Wysocki90692402012-08-09 23:00:02 +0200352#ifdef CONFIG_PM_SLEEP
Rafael J. Wysockie71eeb22014-07-23 00:59:04 +0200353static int acpi_button_suspend(struct device *dev)
354{
355 struct acpi_device *device = to_acpi_device(dev);
356 struct acpi_button *button = acpi_driver_data(device);
357
358 button->suspended = true;
359 return 0;
360}
361
Rafael J. Wysocki1be532d2012-06-27 23:26:51 +0200362static int acpi_button_resume(struct device *dev)
Alexey Starikovskiy23de5d92007-10-22 14:18:18 +0400363{
Rafael J. Wysocki1be532d2012-06-27 23:26:51 +0200364 struct acpi_device *device = to_acpi_device(dev);
Bjorn Helgaas1bce8112009-04-08 15:39:49 +0000365 struct acpi_button *button = acpi_driver_data(device);
Bjorn Helgaas50a4da82009-04-08 15:39:38 +0000366
Rafael J. Wysockie71eeb22014-07-23 00:59:04 +0200367 button->suspended = false;
Lv Zheng3540c322016-06-01 18:10:48 +0800368 if (button->type == ACPI_BUTTON_TYPE_LID)
369 acpi_lid_initialize_state(device);
Alexey Starikovskiy23de5d92007-10-22 14:18:18 +0400370 return 0;
371}
Rafael J. Wysocki90692402012-08-09 23:00:02 +0200372#endif
Alexey Starikovskiy23de5d92007-10-22 14:18:18 +0400373
Len Brown4be44fc2005-08-05 00:44:28 -0400374static int acpi_button_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375{
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500376 struct acpi_button *button;
377 struct input_dev *input;
Thomas Renninger620e1122010-10-01 10:54:00 +0200378 const char *hid = acpi_device_hid(device);
379 char *name, *class;
Bjorn Helgaas1bce8112009-04-08 15:39:49 +0000380 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500382 button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 if (!button)
Patrick Mocheld550d982006-06-27 00:41:40 -0400384 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
Pavel Machekdb89b4f2008-09-22 14:37:34 -0700386 device->driver_data = button;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500388 button->input = input = input_allocate_device();
389 if (!input) {
390 error = -ENOMEM;
391 goto err_free_button;
392 }
393
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000394 name = acpi_device_name(device);
395 class = acpi_device_class(device);
396
Bjorn Helgaasd68b5972009-04-08 15:40:04 +0000397 if (!strcmp(hid, ACPI_BUTTON_HID_POWER) ||
398 !strcmp(hid, ACPI_BUTTON_HID_POWERF)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 button->type = ACPI_BUTTON_TYPE_POWER;
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000400 strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER);
401 sprintf(class, "%s/%s",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
Bjorn Helgaasd68b5972009-04-08 15:40:04 +0000403 } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) ||
404 !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 button->type = ACPI_BUTTON_TYPE_SLEEP;
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000406 strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP);
407 sprintf(class, "%s/%s",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000409 } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 button->type = ACPI_BUTTON_TYPE_LID;
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000411 strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID);
412 sprintf(class, "%s/%s",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
Len Brown4be44fc2005-08-05 00:44:28 -0400414 } else {
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000415 printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid);
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500416 error = -ENODEV;
417 goto err_free_input;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 }
419
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500420 error = acpi_button_add_fs(device);
421 if (error)
422 goto err_free_input;
423
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000424 snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500425
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000426 input->name = name;
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500427 input->phys = button->phys;
428 input->id.bustype = BUS_HOST;
429 input->id.product = button->type;
Andrey Borzenkov3b34e522008-03-04 15:06:35 -0800430 input->dev.parent = &device->dev;
Alexey Starikovskiyb34a8032005-08-03 17:55:21 -0400431
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 switch (button->type) {
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500433 case ACPI_BUTTON_TYPE_POWER:
Lan Tianyu763f5272013-09-12 03:32:03 -0400434 input_set_capability(input, EV_KEY, KEY_POWER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 break;
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500436
437 case ACPI_BUTTON_TYPE_SLEEP:
Lan Tianyu763f5272013-09-12 03:32:03 -0400438 input_set_capability(input, EV_KEY, KEY_SLEEP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 break;
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500440
441 case ACPI_BUTTON_TYPE_LID:
Lan Tianyu763f5272013-09-12 03:32:03 -0400442 input_set_capability(input, EV_SW, SW_LID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 break;
444 }
445
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500446 error = input_register_device(input);
447 if (error)
Bjorn Helgaas373cfc32009-03-30 17:48:18 +0000448 goto err_remove_fs;
Jesse Barnes7e127152009-09-10 15:28:02 -0700449 if (button->type == ACPI_BUTTON_TYPE_LID) {
Lv Zheng3540c322016-06-01 18:10:48 +0800450 acpi_lid_initialize_state(device);
Jesse Barnes7e127152009-09-10 15:28:02 -0700451 /*
452 * This assumes there's only one lid device, or if there are
453 * more we only care about the last one...
454 */
455 lid_device = device;
456 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457
Bjorn Helgaasbf04a772009-04-08 15:39:54 +0000458 printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device));
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500459 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500461 err_remove_fs:
462 acpi_button_remove_fs(device);
463 err_free_input:
464 input_free_device(input);
465 err_free_button:
466 kfree(button);
467 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468}
469
Rafael J. Wysocki51fac832013-01-24 00:24:48 +0100470static int acpi_button_remove(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471{
Bjorn Helgaas1bce8112009-04-08 15:39:49 +0000472 struct acpi_button *button = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
Len Brown4be44fc2005-08-05 00:44:28 -0400474 acpi_button_remove_fs(device);
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500475 input_unregister_device(button->input);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 kfree(button);
Patrick Mocheld550d982006-06-27 00:41:40 -0400477 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478}
479
Lv Zheng3540c322016-06-01 18:10:48 +0800480static int param_set_lid_init_state(const char *val, struct kernel_param *kp)
481{
482 int result = 0;
483
484 if (!strncmp(val, "open", sizeof("open") - 1)) {
485 lid_init_state = ACPI_BUTTON_LID_INIT_OPEN;
486 pr_info("Notify initial lid state as open\n");
487 } else if (!strncmp(val, "method", sizeof("method") - 1)) {
488 lid_init_state = ACPI_BUTTON_LID_INIT_METHOD;
489 pr_info("Notify initial lid state with _LID return value\n");
490 } else if (!strncmp(val, "ignore", sizeof("ignore") - 1)) {
491 lid_init_state = ACPI_BUTTON_LID_INIT_IGNORE;
492 pr_info("Do not notify initial lid state\n");
493 } else
494 result = -EINVAL;
495 return result;
496}
497
498static int param_get_lid_init_state(char *buffer, struct kernel_param *kp)
499{
500 switch (lid_init_state) {
501 case ACPI_BUTTON_LID_INIT_OPEN:
502 return sprintf(buffer, "open");
503 case ACPI_BUTTON_LID_INIT_METHOD:
504 return sprintf(buffer, "method");
505 case ACPI_BUTTON_LID_INIT_IGNORE:
506 return sprintf(buffer, "ignore");
507 default:
508 return sprintf(buffer, "invalid");
509 }
510 return 0;
511}
512
513module_param_call(lid_init_state,
514 param_set_lid_init_state, param_get_lid_init_state,
515 NULL, 0644);
516MODULE_PARM_DESC(lid_init_state, "Behavior for reporting LID initial state");
517
Mika Westerberg466e78f2012-09-07 10:31:39 +0300518module_acpi_driver(acpi_button_driver);