Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Bjorn Helgaas | 50a4da8 | 2009-04-08 15:39:38 +0000 | [diff] [blame] | 2 | * button.c - ACPI Button Driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 20 | */ |
| 21 | |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/init.h> |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 25 | #include <linux/types.h> |
| 26 | #include <linux/proc_fs.h> |
| 27 | #include <linux/seq_file.h> |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 28 | #include <linux/input.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 29 | #include <linux/slab.h> |
Lv Zheng | 8b48463 | 2013-12-03 08:49:16 +0800 | [diff] [blame] | 30 | #include <linux/acpi.h> |
Andy Shevchenko | 6270da6 | 2013-03-11 09:17:04 +0000 | [diff] [blame] | 31 | #include <acpi/button.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
Len Brown | a192a95 | 2009-07-28 16:45:54 -0400 | [diff] [blame] | 33 | #define PREFIX "ACPI: " |
| 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #define ACPI_BUTTON_CLASS "button" |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 36 | #define ACPI_BUTTON_FILE_INFO "info" |
| 37 | #define ACPI_BUTTON_FILE_STATE "state" |
| 38 | #define ACPI_BUTTON_TYPE_UNKNOWN 0x00 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #define ACPI_BUTTON_NOTIFY_STATUS 0x80 |
| 40 | |
| 41 | #define ACPI_BUTTON_SUBCLASS_POWER "power" |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 42 | #define ACPI_BUTTON_HID_POWER "PNP0C0C" |
Bjorn Helgaas | d68b597 | 2009-04-08 15:40:04 +0000 | [diff] [blame] | 43 | #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #define ACPI_BUTTON_TYPE_POWER 0x01 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep" |
| 47 | #define ACPI_BUTTON_HID_SLEEP "PNP0C0E" |
Bjorn Helgaas | d68b597 | 2009-04-08 15:40:04 +0000 | [diff] [blame] | 48 | #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #define ACPI_BUTTON_TYPE_SLEEP 0x03 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
| 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 Zheng | 3540c32 | 2016-06-01 18:10:48 +0800 | [diff] [blame^] | 56 | #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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | #define _COMPONENT ACPI_BUTTON_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 61 | ACPI_MODULE_NAME("button"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 63 | MODULE_AUTHOR("Paul Diefenbaugh"); |
Len Brown | 7cda93e | 2007-02-12 23:50:02 -0500 | [diff] [blame] | 64 | MODULE_DESCRIPTION("ACPI Button Driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | MODULE_LICENSE("GPL"); |
| 66 | |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 67 | static 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 | }; |
| 75 | MODULE_DEVICE_TABLE(acpi, button_device_ids); |
| 76 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 77 | static int acpi_button_add(struct acpi_device *device); |
Rafael J. Wysocki | 51fac83 | 2013-01-24 00:24:48 +0100 | [diff] [blame] | 78 | static int acpi_button_remove(struct acpi_device *device); |
Bjorn Helgaas | 373cfc3 | 2009-03-30 17:48:18 +0000 | [diff] [blame] | 79 | static void acpi_button_notify(struct acpi_device *device, u32 event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
Rafael J. Wysocki | 9069240 | 2012-08-09 23:00:02 +0200 | [diff] [blame] | 81 | #ifdef CONFIG_PM_SLEEP |
Rafael J. Wysocki | e71eeb2 | 2014-07-23 00:59:04 +0200 | [diff] [blame] | 82 | static int acpi_button_suspend(struct device *dev); |
Rafael J. Wysocki | 1be532d | 2012-06-27 23:26:51 +0200 | [diff] [blame] | 83 | static int acpi_button_resume(struct device *dev); |
Shuah Khan | 2de9fd1 | 2014-02-12 20:19:07 -0700 | [diff] [blame] | 84 | #else |
Rafael J. Wysocki | e71eeb2 | 2014-07-23 00:59:04 +0200 | [diff] [blame] | 85 | #define acpi_button_suspend NULL |
Shuah Khan | 2de9fd1 | 2014-02-12 20:19:07 -0700 | [diff] [blame] | 86 | #define acpi_button_resume NULL |
Rafael J. Wysocki | 9069240 | 2012-08-09 23:00:02 +0200 | [diff] [blame] | 87 | #endif |
Rafael J. Wysocki | e71eeb2 | 2014-07-23 00:59:04 +0200 | [diff] [blame] | 88 | static SIMPLE_DEV_PM_OPS(acpi_button_pm, acpi_button_suspend, acpi_button_resume); |
Rafael J. Wysocki | 1be532d | 2012-06-27 23:26:51 +0200 | [diff] [blame] | 89 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | static struct acpi_driver acpi_button_driver = { |
Len Brown | c2b6705 | 2007-02-12 23:33:40 -0500 | [diff] [blame] | 91 | .name = "button", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 92 | .class = ACPI_BUTTON_CLASS, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 93 | .ids = button_device_ids, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 94 | .ops = { |
| 95 | .add = acpi_button_add, |
| 96 | .remove = acpi_button_remove, |
Bjorn Helgaas | 373cfc3 | 2009-03-30 17:48:18 +0000 | [diff] [blame] | 97 | .notify = acpi_button_notify, |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 98 | }, |
Rafael J. Wysocki | 1be532d | 2012-06-27 23:26:51 +0200 | [diff] [blame] | 99 | .drv.pm = &acpi_button_pm, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | }; |
| 101 | |
| 102 | struct acpi_button { |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 103 | unsigned int type; |
| 104 | struct input_dev *input; |
| 105 | char phys[32]; /* for input device */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 106 | unsigned long pushed; |
Rafael J. Wysocki | e71eeb2 | 2014-07-23 00:59:04 +0200 | [diff] [blame] | 107 | bool suspended; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | }; |
| 109 | |
Jesse Barnes | 7e12715 | 2009-09-10 15:28:02 -0700 | [diff] [blame] | 110 | static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier); |
| 111 | static struct acpi_device *lid_device; |
Lv Zheng | 3540c32 | 2016-06-01 18:10:48 +0800 | [diff] [blame^] | 112 | static u8 lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; |
Jesse Barnes | 7e12715 | 2009-09-10 15:28:02 -0700 | [diff] [blame] | 113 | |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 114 | /* -------------------------------------------------------------------------- |
| 115 | FS Interface (/proc) |
| 116 | -------------------------------------------------------------------------- */ |
| 117 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 118 | static struct proc_dir_entry *acpi_button_dir; |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 119 | static struct proc_dir_entry *acpi_lid_dir; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 120 | |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 121 | static 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 | |
| 133 | static 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 Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 159 | static int acpi_button_state_seq_show(struct seq_file *seq, void *offset) |
| 160 | { |
Bjorn Helgaas | 106c19e | 2009-04-08 15:39:59 +0000 | [diff] [blame] | 161 | struct acpi_device *device = seq->private; |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 162 | int state; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 163 | |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 164 | state = acpi_lid_evaluate_state(device); |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 165 | seq_printf(seq, "state: %s\n", |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 166 | state < 0 ? "unsupported" : (state ? "open" : "closed")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 167 | return 0; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | static int acpi_button_state_open_fs(struct inode *inode, struct file *file) |
| 171 | { |
Al Viro | d9dda78 | 2013-03-31 18:16:14 -0400 | [diff] [blame] | 172 | return single_open(file, acpi_button_state_seq_show, PDE_DATA(inode)); |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 173 | } |
| 174 | |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 175 | static 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 Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 182 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 183 | static int acpi_button_add_fs(struct acpi_device *device) |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 184 | { |
Bjorn Helgaas | 1bce811 | 2009-04-08 15:39:49 +0000 | [diff] [blame] | 185 | struct acpi_button *button = acpi_driver_data(device); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 186 | struct proc_dir_entry *entry = NULL; |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 187 | int ret = 0; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 188 | |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 189 | /* 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 Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 196 | } |
| 197 | |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 198 | /* create /proc/acpi/button */ |
| 199 | acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); |
| 200 | if (!acpi_button_dir) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 201 | return -ENODEV; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 202 | |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 203 | /* 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 Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 209 | |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 210 | /* 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. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 219 | S_IRUGO, acpi_device_dir(device), |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 220 | &acpi_button_state_fops, device); |
| 221 | if (!entry) { |
| 222 | ret = -ENODEV; |
| 223 | goto remove_dev_dir; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 224 | } |
| 225 | |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 226 | done: |
| 227 | return ret; |
| 228 | |
| 229 | remove_dev_dir: |
| 230 | remove_proc_entry(acpi_device_bid(device), |
| 231 | acpi_lid_dir); |
| 232 | acpi_device_dir(device) = NULL; |
| 233 | remove_lid_dir: |
| 234 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); |
| 235 | remove_button_dir: |
| 236 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); |
| 237 | goto done; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 238 | } |
| 239 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 240 | static int acpi_button_remove_fs(struct acpi_device *device) |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 241 | { |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 242 | struct acpi_button *button = acpi_driver_data(device); |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 243 | |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 244 | if (button->type != ACPI_BUTTON_TYPE_LID) |
| 245 | return 0; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 246 | |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 247 | remove_proc_entry(ACPI_BUTTON_FILE_STATE, |
| 248 | acpi_device_dir(device)); |
| 249 | remove_proc_entry(acpi_device_bid(device), |
| 250 | acpi_lid_dir); |
| 251 | acpi_device_dir(device) = NULL; |
| 252 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); |
| 253 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 254 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 255 | return 0; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 256 | } |
| 257 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | /* -------------------------------------------------------------------------- |
| 259 | Driver Interface |
| 260 | -------------------------------------------------------------------------- */ |
Jesse Barnes | 7e12715 | 2009-09-10 15:28:02 -0700 | [diff] [blame] | 261 | int acpi_lid_notifier_register(struct notifier_block *nb) |
| 262 | { |
| 263 | return blocking_notifier_chain_register(&acpi_lid_notifier, nb); |
| 264 | } |
| 265 | EXPORT_SYMBOL(acpi_lid_notifier_register); |
| 266 | |
| 267 | int acpi_lid_notifier_unregister(struct notifier_block *nb) |
| 268 | { |
| 269 | return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb); |
| 270 | } |
| 271 | EXPORT_SYMBOL(acpi_lid_notifier_unregister); |
| 272 | |
| 273 | int acpi_lid_open(void) |
| 274 | { |
Jesse Barnes | 2c907b7 | 2009-10-07 14:39:46 -0700 | [diff] [blame] | 275 | if (!lid_device) |
| 276 | return -ENODEV; |
| 277 | |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 278 | return acpi_lid_evaluate_state(lid_device); |
Jesse Barnes | 7e12715 | 2009-09-10 15:28:02 -0700 | [diff] [blame] | 279 | } |
| 280 | EXPORT_SYMBOL(acpi_lid_open); |
| 281 | |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 282 | static int acpi_lid_update_state(struct acpi_device *device) |
Alexey Starikovskiy | 23de5d9 | 2007-10-22 14:18:18 +0400 | [diff] [blame] | 283 | { |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 284 | int state; |
Alexey Starikovskiy | 23de5d9 | 2007-10-22 14:18:18 +0400 | [diff] [blame] | 285 | |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 286 | state = acpi_lid_evaluate_state(device); |
| 287 | if (state < 0) |
| 288 | return state; |
Bjorn Helgaas | 50a4da8 | 2009-04-08 15:39:38 +0000 | [diff] [blame] | 289 | |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 290 | return acpi_lid_notify_state(device, state); |
Alexey Starikovskiy | 23de5d9 | 2007-10-22 14:18:18 +0400 | [diff] [blame] | 291 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
Lv Zheng | 3540c32 | 2016-06-01 18:10:48 +0800 | [diff] [blame^] | 293 | static void acpi_lid_initialize_state(struct acpi_device *device) |
| 294 | { |
| 295 | switch (lid_init_state) { |
| 296 | case ACPI_BUTTON_LID_INIT_OPEN: |
| 297 | (void)acpi_lid_notify_state(device, 1); |
| 298 | break; |
| 299 | case ACPI_BUTTON_LID_INIT_METHOD: |
| 300 | (void)acpi_lid_update_state(device); |
| 301 | break; |
| 302 | case ACPI_BUTTON_LID_INIT_IGNORE: |
| 303 | default: |
| 304 | break; |
| 305 | } |
| 306 | } |
| 307 | |
Bjorn Helgaas | 373cfc3 | 2009-03-30 17:48:18 +0000 | [diff] [blame] | 308 | static void acpi_button_notify(struct acpi_device *device, u32 event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | { |
Bjorn Helgaas | 373cfc3 | 2009-03-30 17:48:18 +0000 | [diff] [blame] | 310 | struct acpi_button *button = acpi_driver_data(device); |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 311 | struct input_dev *input; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | switch (event) { |
Bjorn Helgaas | 373cfc3 | 2009-03-30 17:48:18 +0000 | [diff] [blame] | 314 | case ACPI_FIXED_HARDWARE_EVENT: |
| 315 | event = ACPI_BUTTON_NOTIFY_STATUS; |
| 316 | /* fall through */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | case ACPI_BUTTON_NOTIFY_STATUS: |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 318 | input = button->input; |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 319 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 320 | acpi_lid_update_state(device); |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 321 | } else { |
Rafael J. Wysocki | e71eeb2 | 2014-07-23 00:59:04 +0200 | [diff] [blame] | 322 | int keycode; |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 323 | |
Rafael J. Wysocki | e71eeb2 | 2014-07-23 00:59:04 +0200 | [diff] [blame] | 324 | pm_wakeup_event(&device->dev, 0); |
| 325 | if (button->suspended) |
| 326 | break; |
| 327 | |
| 328 | keycode = test_bit(KEY_SLEEP, input->keybit) ? |
| 329 | KEY_SLEEP : KEY_POWER; |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 330 | input_report_key(input, keycode, 1); |
| 331 | input_sync(input); |
| 332 | input_report_key(input, keycode, 0); |
Guillem Jover | df316e9 | 2008-10-24 00:28:33 +0300 | [diff] [blame] | 333 | input_sync(input); |
Rafael J. Wysocki | 1f83511 | 2011-01-06 23:36:01 +0100 | [diff] [blame] | 334 | |
Lan Tianyu | 0bf6368 | 2014-03-15 13:37:13 -0400 | [diff] [blame] | 335 | acpi_bus_generate_netlink_event( |
| 336 | device->pnp.device_class, |
| 337 | dev_name(&device->dev), |
| 338 | event, ++button->pushed); |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 339 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | break; |
| 341 | default: |
| 342 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 343 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | break; |
| 345 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | } |
| 347 | |
Rafael J. Wysocki | 9069240 | 2012-08-09 23:00:02 +0200 | [diff] [blame] | 348 | #ifdef CONFIG_PM_SLEEP |
Rafael J. Wysocki | e71eeb2 | 2014-07-23 00:59:04 +0200 | [diff] [blame] | 349 | static int acpi_button_suspend(struct device *dev) |
| 350 | { |
| 351 | struct acpi_device *device = to_acpi_device(dev); |
| 352 | struct acpi_button *button = acpi_driver_data(device); |
| 353 | |
| 354 | button->suspended = true; |
| 355 | return 0; |
| 356 | } |
| 357 | |
Rafael J. Wysocki | 1be532d | 2012-06-27 23:26:51 +0200 | [diff] [blame] | 358 | static int acpi_button_resume(struct device *dev) |
Alexey Starikovskiy | 23de5d9 | 2007-10-22 14:18:18 +0400 | [diff] [blame] | 359 | { |
Rafael J. Wysocki | 1be532d | 2012-06-27 23:26:51 +0200 | [diff] [blame] | 360 | struct acpi_device *device = to_acpi_device(dev); |
Bjorn Helgaas | 1bce811 | 2009-04-08 15:39:49 +0000 | [diff] [blame] | 361 | struct acpi_button *button = acpi_driver_data(device); |
Bjorn Helgaas | 50a4da8 | 2009-04-08 15:39:38 +0000 | [diff] [blame] | 362 | |
Rafael J. Wysocki | e71eeb2 | 2014-07-23 00:59:04 +0200 | [diff] [blame] | 363 | button->suspended = false; |
Lv Zheng | 3540c32 | 2016-06-01 18:10:48 +0800 | [diff] [blame^] | 364 | if (button->type == ACPI_BUTTON_TYPE_LID) |
| 365 | acpi_lid_initialize_state(device); |
Alexey Starikovskiy | 23de5d9 | 2007-10-22 14:18:18 +0400 | [diff] [blame] | 366 | return 0; |
| 367 | } |
Rafael J. Wysocki | 9069240 | 2012-08-09 23:00:02 +0200 | [diff] [blame] | 368 | #endif |
Alexey Starikovskiy | 23de5d9 | 2007-10-22 14:18:18 +0400 | [diff] [blame] | 369 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 370 | static int acpi_button_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | { |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 372 | struct acpi_button *button; |
| 373 | struct input_dev *input; |
Thomas Renninger | 620e112 | 2010-10-01 10:54:00 +0200 | [diff] [blame] | 374 | const char *hid = acpi_device_hid(device); |
| 375 | char *name, *class; |
Bjorn Helgaas | 1bce811 | 2009-04-08 15:39:49 +0000 | [diff] [blame] | 376 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 378 | button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | if (!button) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 380 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 382 | device->driver_data = button; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 384 | button->input = input = input_allocate_device(); |
| 385 | if (!input) { |
| 386 | error = -ENOMEM; |
| 387 | goto err_free_button; |
| 388 | } |
| 389 | |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 390 | name = acpi_device_name(device); |
| 391 | class = acpi_device_class(device); |
| 392 | |
Bjorn Helgaas | d68b597 | 2009-04-08 15:40:04 +0000 | [diff] [blame] | 393 | if (!strcmp(hid, ACPI_BUTTON_HID_POWER) || |
| 394 | !strcmp(hid, ACPI_BUTTON_HID_POWERF)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | button->type = ACPI_BUTTON_TYPE_POWER; |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 396 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER); |
| 397 | sprintf(class, "%s/%s", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
Bjorn Helgaas | d68b597 | 2009-04-08 15:40:04 +0000 | [diff] [blame] | 399 | } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) || |
| 400 | !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | button->type = ACPI_BUTTON_TYPE_SLEEP; |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 402 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP); |
| 403 | sprintf(class, "%s/%s", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 405 | } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | button->type = ACPI_BUTTON_TYPE_LID; |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 407 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID); |
| 408 | sprintf(class, "%s/%s", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 410 | } else { |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 411 | printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid); |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 412 | error = -ENODEV; |
| 413 | goto err_free_input; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | } |
| 415 | |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 416 | error = acpi_button_add_fs(device); |
| 417 | if (error) |
| 418 | goto err_free_input; |
| 419 | |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 420 | snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid); |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 421 | |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 422 | input->name = name; |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 423 | input->phys = button->phys; |
| 424 | input->id.bustype = BUS_HOST; |
| 425 | input->id.product = button->type; |
Andrey Borzenkov | 3b34e52 | 2008-03-04 15:06:35 -0800 | [diff] [blame] | 426 | input->dev.parent = &device->dev; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 427 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | switch (button->type) { |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 429 | case ACPI_BUTTON_TYPE_POWER: |
Lan Tianyu | 763f527 | 2013-09-12 03:32:03 -0400 | [diff] [blame] | 430 | input_set_capability(input, EV_KEY, KEY_POWER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | break; |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 432 | |
| 433 | case ACPI_BUTTON_TYPE_SLEEP: |
Lan Tianyu | 763f527 | 2013-09-12 03:32:03 -0400 | [diff] [blame] | 434 | input_set_capability(input, EV_KEY, KEY_SLEEP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | break; |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 436 | |
| 437 | case ACPI_BUTTON_TYPE_LID: |
Lan Tianyu | 763f527 | 2013-09-12 03:32:03 -0400 | [diff] [blame] | 438 | input_set_capability(input, EV_SW, SW_LID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | break; |
| 440 | } |
| 441 | |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 442 | error = input_register_device(input); |
| 443 | if (error) |
Bjorn Helgaas | 373cfc3 | 2009-03-30 17:48:18 +0000 | [diff] [blame] | 444 | goto err_remove_fs; |
Jesse Barnes | 7e12715 | 2009-09-10 15:28:02 -0700 | [diff] [blame] | 445 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
Lv Zheng | 3540c32 | 2016-06-01 18:10:48 +0800 | [diff] [blame^] | 446 | acpi_lid_initialize_state(device); |
Jesse Barnes | 7e12715 | 2009-09-10 15:28:02 -0700 | [diff] [blame] | 447 | /* |
| 448 | * This assumes there's only one lid device, or if there are |
| 449 | * more we only care about the last one... |
| 450 | */ |
| 451 | lid_device = device; |
| 452 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 454 | printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device)); |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 455 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 457 | err_remove_fs: |
| 458 | acpi_button_remove_fs(device); |
| 459 | err_free_input: |
| 460 | input_free_device(input); |
| 461 | err_free_button: |
| 462 | kfree(button); |
| 463 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | } |
| 465 | |
Rafael J. Wysocki | 51fac83 | 2013-01-24 00:24:48 +0100 | [diff] [blame] | 466 | static int acpi_button_remove(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | { |
Bjorn Helgaas | 1bce811 | 2009-04-08 15:39:49 +0000 | [diff] [blame] | 468 | struct acpi_button *button = acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 470 | acpi_button_remove_fs(device); |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 471 | input_unregister_device(button->input); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | kfree(button); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 473 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | } |
| 475 | |
Lv Zheng | 3540c32 | 2016-06-01 18:10:48 +0800 | [diff] [blame^] | 476 | static int param_set_lid_init_state(const char *val, struct kernel_param *kp) |
| 477 | { |
| 478 | int result = 0; |
| 479 | |
| 480 | if (!strncmp(val, "open", sizeof("open") - 1)) { |
| 481 | lid_init_state = ACPI_BUTTON_LID_INIT_OPEN; |
| 482 | pr_info("Notify initial lid state as open\n"); |
| 483 | } else if (!strncmp(val, "method", sizeof("method") - 1)) { |
| 484 | lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; |
| 485 | pr_info("Notify initial lid state with _LID return value\n"); |
| 486 | } else if (!strncmp(val, "ignore", sizeof("ignore") - 1)) { |
| 487 | lid_init_state = ACPI_BUTTON_LID_INIT_IGNORE; |
| 488 | pr_info("Do not notify initial lid state\n"); |
| 489 | } else |
| 490 | result = -EINVAL; |
| 491 | return result; |
| 492 | } |
| 493 | |
| 494 | static int param_get_lid_init_state(char *buffer, struct kernel_param *kp) |
| 495 | { |
| 496 | switch (lid_init_state) { |
| 497 | case ACPI_BUTTON_LID_INIT_OPEN: |
| 498 | return sprintf(buffer, "open"); |
| 499 | case ACPI_BUTTON_LID_INIT_METHOD: |
| 500 | return sprintf(buffer, "method"); |
| 501 | case ACPI_BUTTON_LID_INIT_IGNORE: |
| 502 | return sprintf(buffer, "ignore"); |
| 503 | default: |
| 504 | return sprintf(buffer, "invalid"); |
| 505 | } |
| 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | module_param_call(lid_init_state, |
| 510 | param_set_lid_init_state, param_get_lid_init_state, |
| 511 | NULL, 0644); |
| 512 | MODULE_PARM_DESC(lid_init_state, "Behavior for reporting LID initial state"); |
| 513 | |
Mika Westerberg | 466e78f | 2012-09-07 10:31:39 +0300 | [diff] [blame] | 514 | module_acpi_driver(acpi_button_driver); |