Thomas Gleixner | c942fdd | 2019-05-27 08:55:06 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
Bjorn Helgaas | 50a4da8 | 2009-04-08 15:39:38 +0000 | [diff] [blame] | 3 | * button.c - ACPI Button Driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
| 5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| 6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
Vincent Legoll | b6aeab4 | 2017-05-20 20:38:13 +0200 | [diff] [blame] | 9 | #define pr_fmt(fmt) "ACPI: button: " fmt |
Lv Zheng | dfa46c5 | 2016-08-17 16:22:58 +0800 | [diff] [blame] | 10 | |
Randy Dunlap | 2c4c2a7 | 2018-07-07 08:25:01 -0700 | [diff] [blame] | 11 | #include <linux/compiler.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/kernel.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/init.h> |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 15 | #include <linux/types.h> |
| 16 | #include <linux/proc_fs.h> |
| 17 | #include <linux/seq_file.h> |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 18 | #include <linux/input.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 19 | #include <linux/slab.h> |
Lv Zheng | 8b48463 | 2013-12-03 08:49:16 +0800 | [diff] [blame] | 20 | #include <linux/acpi.h> |
Hans de Goede | 9e811e1 | 2017-11-22 16:06:12 +0100 | [diff] [blame] | 21 | #include <linux/dmi.h> |
Andy Shevchenko | 6270da6 | 2013-03-11 09:17:04 +0000 | [diff] [blame] | 22 | #include <acpi/button.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
Len Brown | a192a95 | 2009-07-28 16:45:54 -0400 | [diff] [blame] | 24 | #define PREFIX "ACPI: " |
| 25 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #define ACPI_BUTTON_CLASS "button" |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 27 | #define ACPI_BUTTON_FILE_INFO "info" |
| 28 | #define ACPI_BUTTON_FILE_STATE "state" |
| 29 | #define ACPI_BUTTON_TYPE_UNKNOWN 0x00 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #define ACPI_BUTTON_NOTIFY_STATUS 0x80 |
| 31 | |
| 32 | #define ACPI_BUTTON_SUBCLASS_POWER "power" |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 33 | #define ACPI_BUTTON_HID_POWER "PNP0C0C" |
Bjorn Helgaas | d68b597 | 2009-04-08 15:40:04 +0000 | [diff] [blame] | 34 | #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #define ACPI_BUTTON_TYPE_POWER 0x01 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
| 37 | #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep" |
| 38 | #define ACPI_BUTTON_HID_SLEEP "PNP0C0E" |
Bjorn Helgaas | d68b597 | 2009-04-08 15:40:04 +0000 | [diff] [blame] | 39 | #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #define ACPI_BUTTON_TYPE_SLEEP 0x03 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | #define ACPI_BUTTON_SUBCLASS_LID "lid" |
| 43 | #define ACPI_BUTTON_HID_LID "PNP0C0D" |
| 44 | #define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch" |
| 45 | #define ACPI_BUTTON_TYPE_LID 0x05 |
| 46 | |
Hans de Goede | 065bd4d | 2019-10-26 22:24:31 +0200 | [diff] [blame] | 47 | enum { |
| 48 | ACPI_BUTTON_LID_INIT_IGNORE, |
| 49 | ACPI_BUTTON_LID_INIT_OPEN, |
| 50 | ACPI_BUTTON_LID_INIT_METHOD, |
Hans de Goede | 593681e | 2019-10-26 22:24:32 +0200 | [diff] [blame^] | 51 | ACPI_BUTTON_LID_INIT_DISABLED, |
Hans de Goede | 065bd4d | 2019-10-26 22:24:31 +0200 | [diff] [blame] | 52 | }; |
| 53 | |
| 54 | static const char * const lid_init_state_str[] = { |
| 55 | [ACPI_BUTTON_LID_INIT_IGNORE] = "ignore", |
| 56 | [ACPI_BUTTON_LID_INIT_OPEN] = "open", |
| 57 | [ACPI_BUTTON_LID_INIT_METHOD] = "method", |
Hans de Goede | 593681e | 2019-10-26 22:24:32 +0200 | [diff] [blame^] | 58 | [ACPI_BUTTON_LID_INIT_DISABLED] = "disabled", |
Hans de Goede | 065bd4d | 2019-10-26 22:24:31 +0200 | [diff] [blame] | 59 | }; |
Lv Zheng | 3540c32 | 2016-06-01 18:10:48 +0800 | [diff] [blame] | 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #define _COMPONENT ACPI_BUTTON_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 62 | ACPI_MODULE_NAME("button"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 64 | MODULE_AUTHOR("Paul Diefenbaugh"); |
Len Brown | 7cda93e | 2007-02-12 23:50:02 -0500 | [diff] [blame] | 65 | MODULE_DESCRIPTION("ACPI Button Driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | MODULE_LICENSE("GPL"); |
| 67 | |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 68 | static const struct acpi_device_id button_device_ids[] = { |
| 69 | {ACPI_BUTTON_HID_LID, 0}, |
| 70 | {ACPI_BUTTON_HID_SLEEP, 0}, |
| 71 | {ACPI_BUTTON_HID_SLEEPF, 0}, |
| 72 | {ACPI_BUTTON_HID_POWER, 0}, |
| 73 | {ACPI_BUTTON_HID_POWERF, 0}, |
| 74 | {"", 0}, |
| 75 | }; |
| 76 | MODULE_DEVICE_TABLE(acpi, button_device_ids); |
| 77 | |
Hans de Goede | 9e811e1 | 2017-11-22 16:06:12 +0100 | [diff] [blame] | 78 | /* |
| 79 | * Some devices which don't even have a lid in anyway have a broken _LID |
| 80 | * method (e.g. pointing to a floating gpio pin) causing spurious LID events. |
| 81 | */ |
| 82 | static const struct dmi_system_id lid_blacklst[] = { |
| 83 | { |
| 84 | /* GP-electronic T701 */ |
| 85 | .matches = { |
| 86 | DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), |
| 87 | DMI_MATCH(DMI_PRODUCT_NAME, "T701"), |
| 88 | DMI_MATCH(DMI_BIOS_VERSION, "BYT70A.YNCHENG.WIN.007"), |
| 89 | }, |
| 90 | }, |
| 91 | {} |
| 92 | }; |
| 93 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 94 | static int acpi_button_add(struct acpi_device *device); |
Rafael J. Wysocki | 51fac83 | 2013-01-24 00:24:48 +0100 | [diff] [blame] | 95 | static int acpi_button_remove(struct acpi_device *device); |
Bjorn Helgaas | 373cfc3 | 2009-03-30 17:48:18 +0000 | [diff] [blame] | 96 | static void acpi_button_notify(struct acpi_device *device, u32 event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
Rafael J. Wysocki | 9069240 | 2012-08-09 23:00:02 +0200 | [diff] [blame] | 98 | #ifdef CONFIG_PM_SLEEP |
Rafael J. Wysocki | e71eeb2 | 2014-07-23 00:59:04 +0200 | [diff] [blame] | 99 | static int acpi_button_suspend(struct device *dev); |
Rafael J. Wysocki | 1be532d | 2012-06-27 23:26:51 +0200 | [diff] [blame] | 100 | static int acpi_button_resume(struct device *dev); |
Shuah Khan | 2de9fd1 | 2014-02-12 20:19:07 -0700 | [diff] [blame] | 101 | #else |
Rafael J. Wysocki | e71eeb2 | 2014-07-23 00:59:04 +0200 | [diff] [blame] | 102 | #define acpi_button_suspend NULL |
Shuah Khan | 2de9fd1 | 2014-02-12 20:19:07 -0700 | [diff] [blame] | 103 | #define acpi_button_resume NULL |
Rafael J. Wysocki | 9069240 | 2012-08-09 23:00:02 +0200 | [diff] [blame] | 104 | #endif |
Rafael J. Wysocki | e71eeb2 | 2014-07-23 00:59:04 +0200 | [diff] [blame] | 105 | 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] | 106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | static struct acpi_driver acpi_button_driver = { |
Len Brown | c2b6705 | 2007-02-12 23:33:40 -0500 | [diff] [blame] | 108 | .name = "button", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 109 | .class = ACPI_BUTTON_CLASS, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 110 | .ids = button_device_ids, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 111 | .ops = { |
| 112 | .add = acpi_button_add, |
| 113 | .remove = acpi_button_remove, |
Bjorn Helgaas | 373cfc3 | 2009-03-30 17:48:18 +0000 | [diff] [blame] | 114 | .notify = acpi_button_notify, |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 115 | }, |
Rafael J. Wysocki | 1be532d | 2012-06-27 23:26:51 +0200 | [diff] [blame] | 116 | .drv.pm = &acpi_button_pm, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | }; |
| 118 | |
| 119 | struct acpi_button { |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 120 | unsigned int type; |
| 121 | struct input_dev *input; |
| 122 | char phys[32]; /* for input device */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 123 | unsigned long pushed; |
Lv Zheng | dfa46c5 | 2016-08-17 16:22:58 +0800 | [diff] [blame] | 124 | int last_state; |
| 125 | ktime_t last_time; |
Rafael J. Wysocki | e71eeb2 | 2014-07-23 00:59:04 +0200 | [diff] [blame] | 126 | bool suspended; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | }; |
| 128 | |
Jesse Barnes | 7e12715 | 2009-09-10 15:28:02 -0700 | [diff] [blame] | 129 | static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier); |
| 130 | static struct acpi_device *lid_device; |
Benjamin Tissoires | 878d8db0 | 2017-05-10 18:12:40 +0200 | [diff] [blame] | 131 | static u8 lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; |
Jesse Barnes | 7e12715 | 2009-09-10 15:28:02 -0700 | [diff] [blame] | 132 | |
Lv Zheng | dfa46c5 | 2016-08-17 16:22:58 +0800 | [diff] [blame] | 133 | static unsigned long lid_report_interval __read_mostly = 500; |
| 134 | module_param(lid_report_interval, ulong, 0644); |
| 135 | MODULE_PARM_DESC(lid_report_interval, "Interval (ms) between lid key events"); |
| 136 | |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 137 | /* -------------------------------------------------------------------------- |
| 138 | FS Interface (/proc) |
| 139 | -------------------------------------------------------------------------- */ |
| 140 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 141 | static struct proc_dir_entry *acpi_button_dir; |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 142 | static struct proc_dir_entry *acpi_lid_dir; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 143 | |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 144 | static int acpi_lid_evaluate_state(struct acpi_device *device) |
| 145 | { |
| 146 | unsigned long long lid_state; |
| 147 | acpi_status status; |
| 148 | |
| 149 | status = acpi_evaluate_integer(device->handle, "_LID", NULL, &lid_state); |
| 150 | if (ACPI_FAILURE(status)) |
| 151 | return -ENODEV; |
| 152 | |
| 153 | return lid_state ? 1 : 0; |
| 154 | } |
| 155 | |
| 156 | static int acpi_lid_notify_state(struct acpi_device *device, int state) |
| 157 | { |
| 158 | struct acpi_button *button = acpi_driver_data(device); |
| 159 | int ret; |
Lv Zheng | dfa46c5 | 2016-08-17 16:22:58 +0800 | [diff] [blame] | 160 | ktime_t next_report; |
| 161 | bool do_update; |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 162 | |
Lv Zheng | dfa46c5 | 2016-08-17 16:22:58 +0800 | [diff] [blame] | 163 | /* |
| 164 | * In lid_init_state=ignore mode, if user opens/closes lid |
| 165 | * frequently with "open" missing, and "last_time" is also updated |
| 166 | * frequently, "close" cannot be delivered to the userspace. |
| 167 | * So "last_time" is only updated after a timeout or an actual |
| 168 | * switch. |
| 169 | */ |
| 170 | if (lid_init_state != ACPI_BUTTON_LID_INIT_IGNORE || |
| 171 | button->last_state != !!state) |
| 172 | do_update = true; |
| 173 | else |
| 174 | do_update = false; |
| 175 | |
| 176 | next_report = ktime_add(button->last_time, |
| 177 | ms_to_ktime(lid_report_interval)); |
| 178 | if (button->last_state == !!state && |
| 179 | ktime_after(ktime_get(), next_report)) { |
| 180 | /* Complain the buggy firmware */ |
| 181 | pr_warn_once("The lid device is not compliant to SW_LID.\n"); |
| 182 | |
| 183 | /* |
| 184 | * Send the unreliable complement switch event: |
| 185 | * |
| 186 | * On most platforms, the lid device is reliable. However |
| 187 | * there are exceptions: |
| 188 | * 1. Platforms returning initial lid state as "close" by |
| 189 | * default after booting/resuming: |
| 190 | * https://bugzilla.kernel.org/show_bug.cgi?id=89211 |
| 191 | * https://bugzilla.kernel.org/show_bug.cgi?id=106151 |
| 192 | * 2. Platforms never reporting "open" events: |
| 193 | * https://bugzilla.kernel.org/show_bug.cgi?id=106941 |
| 194 | * On these buggy platforms, the usage model of the ACPI |
| 195 | * lid device actually is: |
| 196 | * 1. The initial returning value of _LID may not be |
| 197 | * reliable. |
| 198 | * 2. The open event may not be reliable. |
| 199 | * 3. The close event is reliable. |
| 200 | * |
| 201 | * But SW_LID is typed as input switch event, the input |
| 202 | * layer checks if the event is redundant. Hence if the |
| 203 | * state is not switched, the userspace cannot see this |
| 204 | * platform triggered reliable event. By inserting a |
| 205 | * complement switch event, it then is guaranteed that the |
| 206 | * platform triggered reliable one can always be seen by |
| 207 | * the userspace. |
| 208 | */ |
| 209 | if (lid_init_state == ACPI_BUTTON_LID_INIT_IGNORE) { |
| 210 | do_update = true; |
| 211 | /* |
| 212 | * Do generate complement switch event for "close" |
| 213 | * as "close" is reliable and wrong "open" won't |
| 214 | * trigger unexpected behaviors. |
| 215 | * Do not generate complement switch event for |
| 216 | * "open" as "open" is not reliable and wrong |
| 217 | * "close" will trigger unexpected behaviors. |
| 218 | */ |
| 219 | if (!state) { |
| 220 | input_report_switch(button->input, |
| 221 | SW_LID, state); |
| 222 | input_sync(button->input); |
| 223 | } |
| 224 | } |
| 225 | } |
| 226 | /* Send the platform triggered reliable event */ |
| 227 | if (do_update) { |
Hans de Goede | ae35d65 | 2017-11-22 16:06:11 +0100 | [diff] [blame] | 228 | acpi_handle_debug(device->handle, "ACPI LID %s\n", |
| 229 | state ? "open" : "closed"); |
Lv Zheng | dfa46c5 | 2016-08-17 16:22:58 +0800 | [diff] [blame] | 230 | input_report_switch(button->input, SW_LID, !state); |
| 231 | input_sync(button->input); |
| 232 | button->last_state = !!state; |
| 233 | button->last_time = ktime_get(); |
| 234 | } |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 235 | |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 236 | ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device); |
| 237 | if (ret == NOTIFY_DONE) |
| 238 | ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, |
| 239 | device); |
| 240 | if (ret == NOTIFY_DONE || ret == NOTIFY_OK) { |
| 241 | /* |
| 242 | * It is also regarded as success if the notifier_chain |
| 243 | * returns NOTIFY_OK or NOTIFY_DONE. |
| 244 | */ |
| 245 | ret = 0; |
| 246 | } |
| 247 | return ret; |
| 248 | } |
| 249 | |
Randy Dunlap | 2c4c2a7 | 2018-07-07 08:25:01 -0700 | [diff] [blame] | 250 | static int __maybe_unused acpi_button_state_seq_show(struct seq_file *seq, |
| 251 | void *offset) |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 252 | { |
Bjorn Helgaas | 106c19e | 2009-04-08 15:39:59 +0000 | [diff] [blame] | 253 | struct acpi_device *device = seq->private; |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 254 | int state; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 255 | |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 256 | state = acpi_lid_evaluate_state(device); |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 257 | seq_printf(seq, "state: %s\n", |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 258 | state < 0 ? "unsupported" : (state ? "open" : "closed")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 259 | return 0; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 260 | } |
| 261 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 262 | static int acpi_button_add_fs(struct acpi_device *device) |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 263 | { |
Bjorn Helgaas | 1bce811 | 2009-04-08 15:39:49 +0000 | [diff] [blame] | 264 | struct acpi_button *button = acpi_driver_data(device); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 265 | struct proc_dir_entry *entry = NULL; |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 266 | int ret = 0; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 267 | |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 268 | /* procfs I/F for ACPI lid device only */ |
| 269 | if (button->type != ACPI_BUTTON_TYPE_LID) |
| 270 | return 0; |
| 271 | |
| 272 | if (acpi_button_dir || acpi_lid_dir) { |
| 273 | printk(KERN_ERR PREFIX "More than one Lid device found!\n"); |
| 274 | return -EEXIST; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 275 | } |
| 276 | |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 277 | /* create /proc/acpi/button */ |
| 278 | acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); |
| 279 | if (!acpi_button_dir) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 280 | return -ENODEV; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 281 | |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 282 | /* create /proc/acpi/button/lid */ |
| 283 | acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); |
| 284 | if (!acpi_lid_dir) { |
| 285 | ret = -ENODEV; |
| 286 | goto remove_button_dir; |
| 287 | } |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 288 | |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 289 | /* create /proc/acpi/button/lid/LID/ */ |
| 290 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir); |
| 291 | if (!acpi_device_dir(device)) { |
| 292 | ret = -ENODEV; |
| 293 | goto remove_lid_dir; |
| 294 | } |
| 295 | |
| 296 | /* create /proc/acpi/button/lid/LID/state */ |
Christoph Hellwig | 3f3942a | 2018-05-15 15:57:23 +0200 | [diff] [blame] | 297 | entry = proc_create_single_data(ACPI_BUTTON_FILE_STATE, S_IRUGO, |
| 298 | acpi_device_dir(device), acpi_button_state_seq_show, |
| 299 | device); |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 300 | if (!entry) { |
| 301 | ret = -ENODEV; |
| 302 | goto remove_dev_dir; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 303 | } |
| 304 | |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 305 | done: |
| 306 | return ret; |
| 307 | |
| 308 | remove_dev_dir: |
| 309 | remove_proc_entry(acpi_device_bid(device), |
| 310 | acpi_lid_dir); |
| 311 | acpi_device_dir(device) = NULL; |
| 312 | remove_lid_dir: |
| 313 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); |
Benjamin Tissoires | e370cc8 | 2016-07-29 17:08:41 +0200 | [diff] [blame] | 314 | acpi_lid_dir = NULL; |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 315 | remove_button_dir: |
| 316 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); |
Benjamin Tissoires | e370cc8 | 2016-07-29 17:08:41 +0200 | [diff] [blame] | 317 | acpi_button_dir = NULL; |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 318 | goto done; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 319 | } |
| 320 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 321 | static int acpi_button_remove_fs(struct acpi_device *device) |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 322 | { |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 323 | struct acpi_button *button = acpi_driver_data(device); |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 324 | |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 325 | if (button->type != ACPI_BUTTON_TYPE_LID) |
| 326 | return 0; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 327 | |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 328 | remove_proc_entry(ACPI_BUTTON_FILE_STATE, |
| 329 | acpi_device_dir(device)); |
| 330 | remove_proc_entry(acpi_device_bid(device), |
| 331 | acpi_lid_dir); |
| 332 | acpi_device_dir(device) = NULL; |
| 333 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); |
Benjamin Tissoires | e370cc8 | 2016-07-29 17:08:41 +0200 | [diff] [blame] | 334 | acpi_lid_dir = NULL; |
Zhang Rui | 912b742 | 2011-03-23 10:21:40 +0800 | [diff] [blame] | 335 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); |
Benjamin Tissoires | e370cc8 | 2016-07-29 17:08:41 +0200 | [diff] [blame] | 336 | acpi_button_dir = NULL; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 337 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 338 | return 0; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 339 | } |
| 340 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | /* -------------------------------------------------------------------------- |
| 342 | Driver Interface |
| 343 | -------------------------------------------------------------------------- */ |
Jesse Barnes | 7e12715 | 2009-09-10 15:28:02 -0700 | [diff] [blame] | 344 | int acpi_lid_notifier_register(struct notifier_block *nb) |
| 345 | { |
| 346 | return blocking_notifier_chain_register(&acpi_lid_notifier, nb); |
| 347 | } |
| 348 | EXPORT_SYMBOL(acpi_lid_notifier_register); |
| 349 | |
| 350 | int acpi_lid_notifier_unregister(struct notifier_block *nb) |
| 351 | { |
| 352 | return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb); |
| 353 | } |
| 354 | EXPORT_SYMBOL(acpi_lid_notifier_unregister); |
| 355 | |
| 356 | int acpi_lid_open(void) |
| 357 | { |
Jesse Barnes | 2c907b7 | 2009-10-07 14:39:46 -0700 | [diff] [blame] | 358 | if (!lid_device) |
| 359 | return -ENODEV; |
| 360 | |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 361 | return acpi_lid_evaluate_state(lid_device); |
Jesse Barnes | 7e12715 | 2009-09-10 15:28:02 -0700 | [diff] [blame] | 362 | } |
| 363 | EXPORT_SYMBOL(acpi_lid_open); |
| 364 | |
Ravi Chandra Sadineni | 7c058c7 | 2018-06-27 10:55:02 -0700 | [diff] [blame] | 365 | static int acpi_lid_update_state(struct acpi_device *device, |
| 366 | bool signal_wakeup) |
Alexey Starikovskiy | 23de5d9 | 2007-10-22 14:18:18 +0400 | [diff] [blame] | 367 | { |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 368 | int state; |
Alexey Starikovskiy | 23de5d9 | 2007-10-22 14:18:18 +0400 | [diff] [blame] | 369 | |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 370 | state = acpi_lid_evaluate_state(device); |
| 371 | if (state < 0) |
| 372 | return state; |
Bjorn Helgaas | 50a4da8 | 2009-04-08 15:39:38 +0000 | [diff] [blame] | 373 | |
Ravi Chandra Sadineni | 7c058c7 | 2018-06-27 10:55:02 -0700 | [diff] [blame] | 374 | if (state && signal_wakeup) |
| 375 | acpi_pm_wakeup_event(&device->dev); |
| 376 | |
Lv Zheng | ee7e226 | 2016-06-01 18:10:42 +0800 | [diff] [blame] | 377 | return acpi_lid_notify_state(device, state); |
Alexey Starikovskiy | 23de5d9 | 2007-10-22 14:18:18 +0400 | [diff] [blame] | 378 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | |
Lv Zheng | 3540c32 | 2016-06-01 18:10:48 +0800 | [diff] [blame] | 380 | static void acpi_lid_initialize_state(struct acpi_device *device) |
| 381 | { |
| 382 | switch (lid_init_state) { |
| 383 | case ACPI_BUTTON_LID_INIT_OPEN: |
| 384 | (void)acpi_lid_notify_state(device, 1); |
| 385 | break; |
Lv Zheng | f369fdf | 2017-05-09 15:02:22 +0800 | [diff] [blame] | 386 | case ACPI_BUTTON_LID_INIT_METHOD: |
Ravi Chandra Sadineni | 7c058c7 | 2018-06-27 10:55:02 -0700 | [diff] [blame] | 387 | (void)acpi_lid_update_state(device, false); |
Lv Zheng | f369fdf | 2017-05-09 15:02:22 +0800 | [diff] [blame] | 388 | break; |
Lv Zheng | 3540c32 | 2016-06-01 18:10:48 +0800 | [diff] [blame] | 389 | case ACPI_BUTTON_LID_INIT_IGNORE: |
| 390 | default: |
| 391 | break; |
| 392 | } |
| 393 | } |
| 394 | |
Bjorn Helgaas | 373cfc3 | 2009-03-30 17:48:18 +0000 | [diff] [blame] | 395 | static void acpi_button_notify(struct acpi_device *device, u32 event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | { |
Bjorn Helgaas | 373cfc3 | 2009-03-30 17:48:18 +0000 | [diff] [blame] | 397 | struct acpi_button *button = acpi_driver_data(device); |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 398 | struct input_dev *input; |
Hans de Goede | 84d3f6b | 2017-09-11 16:07:06 +0200 | [diff] [blame] | 399 | int users; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | switch (event) { |
Bjorn Helgaas | 373cfc3 | 2009-03-30 17:48:18 +0000 | [diff] [blame] | 402 | case ACPI_FIXED_HARDWARE_EVENT: |
| 403 | event = ACPI_BUTTON_NOTIFY_STATUS; |
| 404 | /* fall through */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | case ACPI_BUTTON_NOTIFY_STATUS: |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 406 | input = button->input; |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 407 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
Hans de Goede | 84d3f6b | 2017-09-11 16:07:06 +0200 | [diff] [blame] | 408 | mutex_lock(&button->input->mutex); |
| 409 | users = button->input->users; |
| 410 | mutex_unlock(&button->input->mutex); |
| 411 | if (users) |
Ravi Chandra Sadineni | 7c058c7 | 2018-06-27 10:55:02 -0700 | [diff] [blame] | 412 | acpi_lid_update_state(device, true); |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 413 | } else { |
Rafael J. Wysocki | e71eeb2 | 2014-07-23 00:59:04 +0200 | [diff] [blame] | 414 | int keycode; |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 415 | |
Rafael J. Wysocki | 33e4f80 | 2017-06-12 22:56:34 +0200 | [diff] [blame] | 416 | acpi_pm_wakeup_event(&device->dev); |
Rafael J. Wysocki | e71eeb2 | 2014-07-23 00:59:04 +0200 | [diff] [blame] | 417 | if (button->suspended) |
| 418 | break; |
| 419 | |
| 420 | keycode = test_bit(KEY_SLEEP, input->keybit) ? |
| 421 | KEY_SLEEP : KEY_POWER; |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 422 | input_report_key(input, keycode, 1); |
| 423 | input_sync(input); |
| 424 | input_report_key(input, keycode, 0); |
Guillem Jover | df316e9 | 2008-10-24 00:28:33 +0300 | [diff] [blame] | 425 | input_sync(input); |
Rafael J. Wysocki | 1f83511 | 2011-01-06 23:36:01 +0100 | [diff] [blame] | 426 | |
Lan Tianyu | 0bf6368 | 2014-03-15 13:37:13 -0400 | [diff] [blame] | 427 | acpi_bus_generate_netlink_event( |
| 428 | device->pnp.device_class, |
| 429 | dev_name(&device->dev), |
| 430 | event, ++button->pushed); |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 431 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | break; |
| 433 | default: |
| 434 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 435 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | break; |
| 437 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | } |
| 439 | |
Rafael J. Wysocki | 9069240 | 2012-08-09 23:00:02 +0200 | [diff] [blame] | 440 | #ifdef CONFIG_PM_SLEEP |
Rafael J. Wysocki | e71eeb2 | 2014-07-23 00:59:04 +0200 | [diff] [blame] | 441 | static int acpi_button_suspend(struct device *dev) |
| 442 | { |
| 443 | struct acpi_device *device = to_acpi_device(dev); |
| 444 | struct acpi_button *button = acpi_driver_data(device); |
| 445 | |
| 446 | button->suspended = true; |
| 447 | return 0; |
| 448 | } |
| 449 | |
Rafael J. Wysocki | 1be532d | 2012-06-27 23:26:51 +0200 | [diff] [blame] | 450 | static int acpi_button_resume(struct device *dev) |
Alexey Starikovskiy | 23de5d9 | 2007-10-22 14:18:18 +0400 | [diff] [blame] | 451 | { |
Rafael J. Wysocki | 1be532d | 2012-06-27 23:26:51 +0200 | [diff] [blame] | 452 | struct acpi_device *device = to_acpi_device(dev); |
Bjorn Helgaas | 1bce811 | 2009-04-08 15:39:49 +0000 | [diff] [blame] | 453 | struct acpi_button *button = acpi_driver_data(device); |
Bjorn Helgaas | 50a4da8 | 2009-04-08 15:39:38 +0000 | [diff] [blame] | 454 | |
Rafael J. Wysocki | e71eeb2 | 2014-07-23 00:59:04 +0200 | [diff] [blame] | 455 | button->suspended = false; |
Zhang Rui | 13e9621 | 2019-04-02 21:38:32 +0800 | [diff] [blame] | 456 | if (button->type == ACPI_BUTTON_TYPE_LID && button->input->users) { |
| 457 | button->last_state = !!acpi_lid_evaluate_state(device); |
| 458 | button->last_time = ktime_get(); |
Lv Zheng | 3540c32 | 2016-06-01 18:10:48 +0800 | [diff] [blame] | 459 | acpi_lid_initialize_state(device); |
Zhang Rui | 13e9621 | 2019-04-02 21:38:32 +0800 | [diff] [blame] | 460 | } |
Alexey Starikovskiy | 23de5d9 | 2007-10-22 14:18:18 +0400 | [diff] [blame] | 461 | return 0; |
| 462 | } |
Rafael J. Wysocki | 9069240 | 2012-08-09 23:00:02 +0200 | [diff] [blame] | 463 | #endif |
Alexey Starikovskiy | 23de5d9 | 2007-10-22 14:18:18 +0400 | [diff] [blame] | 464 | |
Hans de Goede | 84d3f6b | 2017-09-11 16:07:06 +0200 | [diff] [blame] | 465 | static int acpi_lid_input_open(struct input_dev *input) |
| 466 | { |
| 467 | struct acpi_device *device = input_get_drvdata(input); |
| 468 | struct acpi_button *button = acpi_driver_data(device); |
| 469 | |
| 470 | button->last_state = !!acpi_lid_evaluate_state(device); |
| 471 | button->last_time = ktime_get(); |
| 472 | acpi_lid_initialize_state(device); |
| 473 | |
| 474 | return 0; |
| 475 | } |
| 476 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 477 | static int acpi_button_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | { |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 479 | struct acpi_button *button; |
| 480 | struct input_dev *input; |
Thomas Renninger | 620e112 | 2010-10-01 10:54:00 +0200 | [diff] [blame] | 481 | const char *hid = acpi_device_hid(device); |
| 482 | char *name, *class; |
Bjorn Helgaas | 1bce811 | 2009-04-08 15:39:49 +0000 | [diff] [blame] | 483 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | |
Hans de Goede | 593681e | 2019-10-26 22:24:32 +0200 | [diff] [blame^] | 485 | if (!strcmp(hid, ACPI_BUTTON_HID_LID) && |
| 486 | (dmi_check_system(lid_blacklst) || |
| 487 | lid_init_state == ACPI_BUTTON_LID_INIT_DISABLED)) |
Hans de Goede | 9e811e1 | 2017-11-22 16:06:12 +0100 | [diff] [blame] | 488 | return -ENODEV; |
| 489 | |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 490 | button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | if (!button) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 492 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 494 | device->driver_data = button; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 496 | button->input = input = input_allocate_device(); |
| 497 | if (!input) { |
| 498 | error = -ENOMEM; |
| 499 | goto err_free_button; |
| 500 | } |
| 501 | |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 502 | name = acpi_device_name(device); |
| 503 | class = acpi_device_class(device); |
| 504 | |
Bjorn Helgaas | d68b597 | 2009-04-08 15:40:04 +0000 | [diff] [blame] | 505 | if (!strcmp(hid, ACPI_BUTTON_HID_POWER) || |
| 506 | !strcmp(hid, ACPI_BUTTON_HID_POWERF)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | button->type = ACPI_BUTTON_TYPE_POWER; |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 508 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER); |
| 509 | sprintf(class, "%s/%s", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
Bjorn Helgaas | d68b597 | 2009-04-08 15:40:04 +0000 | [diff] [blame] | 511 | } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) || |
| 512 | !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | button->type = ACPI_BUTTON_TYPE_SLEEP; |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 514 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP); |
| 515 | sprintf(class, "%s/%s", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 517 | } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | button->type = ACPI_BUTTON_TYPE_LID; |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 519 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID); |
| 520 | sprintf(class, "%s/%s", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); |
Hans de Goede | 84d3f6b | 2017-09-11 16:07:06 +0200 | [diff] [blame] | 522 | input->open = acpi_lid_input_open; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 523 | } else { |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 524 | printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid); |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 525 | error = -ENODEV; |
| 526 | goto err_free_input; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | } |
| 528 | |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 529 | error = acpi_button_add_fs(device); |
| 530 | if (error) |
| 531 | goto err_free_input; |
| 532 | |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 533 | snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid); |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 534 | |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 535 | input->name = name; |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 536 | input->phys = button->phys; |
| 537 | input->id.bustype = BUS_HOST; |
| 538 | input->id.product = button->type; |
Andrey Borzenkov | 3b34e52 | 2008-03-04 15:06:35 -0800 | [diff] [blame] | 539 | input->dev.parent = &device->dev; |
Alexey Starikovskiy | b34a803 | 2005-08-03 17:55:21 -0400 | [diff] [blame] | 540 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | switch (button->type) { |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 542 | case ACPI_BUTTON_TYPE_POWER: |
Lan Tianyu | 763f527 | 2013-09-12 03:32:03 -0400 | [diff] [blame] | 543 | input_set_capability(input, EV_KEY, KEY_POWER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | break; |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 545 | |
| 546 | case ACPI_BUTTON_TYPE_SLEEP: |
Lan Tianyu | 763f527 | 2013-09-12 03:32:03 -0400 | [diff] [blame] | 547 | input_set_capability(input, EV_KEY, KEY_SLEEP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | break; |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 549 | |
| 550 | case ACPI_BUTTON_TYPE_LID: |
Lan Tianyu | 763f527 | 2013-09-12 03:32:03 -0400 | [diff] [blame] | 551 | input_set_capability(input, EV_SW, SW_LID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | break; |
| 553 | } |
| 554 | |
Hans de Goede | 84d3f6b | 2017-09-11 16:07:06 +0200 | [diff] [blame] | 555 | input_set_drvdata(input, device); |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 556 | error = input_register_device(input); |
| 557 | if (error) |
Bjorn Helgaas | 373cfc3 | 2009-03-30 17:48:18 +0000 | [diff] [blame] | 558 | goto err_remove_fs; |
Jesse Barnes | 7e12715 | 2009-09-10 15:28:02 -0700 | [diff] [blame] | 559 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
Jesse Barnes | 7e12715 | 2009-09-10 15:28:02 -0700 | [diff] [blame] | 560 | /* |
| 561 | * This assumes there's only one lid device, or if there are |
| 562 | * more we only care about the last one... |
| 563 | */ |
| 564 | lid_device = device; |
| 565 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
Rafael J. Wysocki | 33e4f80 | 2017-06-12 22:56:34 +0200 | [diff] [blame] | 567 | device_init_wakeup(&device->dev, true); |
Bjorn Helgaas | bf04a77 | 2009-04-08 15:39:54 +0000 | [diff] [blame] | 568 | printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device)); |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 569 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 571 | err_remove_fs: |
| 572 | acpi_button_remove_fs(device); |
| 573 | err_free_input: |
| 574 | input_free_device(input); |
| 575 | err_free_button: |
| 576 | kfree(button); |
| 577 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | } |
| 579 | |
Rafael J. Wysocki | 51fac83 | 2013-01-24 00:24:48 +0100 | [diff] [blame] | 580 | static int acpi_button_remove(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | { |
Bjorn Helgaas | 1bce811 | 2009-04-08 15:39:49 +0000 | [diff] [blame] | 582 | struct acpi_button *button = acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 584 | acpi_button_remove_fs(device); |
Dmitry Torokhov | c0968f0 | 2006-11-09 00:40:13 -0500 | [diff] [blame] | 585 | input_unregister_device(button->input); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | kfree(button); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 587 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | } |
| 589 | |
Kees Cook | e4dca7b | 2017-10-17 19:04:42 -0700 | [diff] [blame] | 590 | static int param_set_lid_init_state(const char *val, |
| 591 | const struct kernel_param *kp) |
Lv Zheng | 3540c32 | 2016-06-01 18:10:48 +0800 | [diff] [blame] | 592 | { |
Hans de Goede | 065bd4d | 2019-10-26 22:24:31 +0200 | [diff] [blame] | 593 | int i; |
Lv Zheng | 3540c32 | 2016-06-01 18:10:48 +0800 | [diff] [blame] | 594 | |
Hans de Goede | 065bd4d | 2019-10-26 22:24:31 +0200 | [diff] [blame] | 595 | i = sysfs_match_string(lid_init_state_str, val); |
| 596 | if (i < 0) |
| 597 | return i; |
| 598 | |
| 599 | lid_init_state = i; |
| 600 | pr_info("Initial lid state set to '%s'\n", lid_init_state_str[i]); |
| 601 | return 0; |
Lv Zheng | 3540c32 | 2016-06-01 18:10:48 +0800 | [diff] [blame] | 602 | } |
| 603 | |
Hans de Goede | 065bd4d | 2019-10-26 22:24:31 +0200 | [diff] [blame] | 604 | static int param_get_lid_init_state(char *buf, const struct kernel_param *kp) |
Lv Zheng | 3540c32 | 2016-06-01 18:10:48 +0800 | [diff] [blame] | 605 | { |
Hans de Goede | 065bd4d | 2019-10-26 22:24:31 +0200 | [diff] [blame] | 606 | int i, c = 0; |
| 607 | |
| 608 | for (i = 0; i < ARRAY_SIZE(lid_init_state_str); i++) |
| 609 | if (i == lid_init_state) |
| 610 | c += sprintf(buf + c, "[%s] ", lid_init_state_str[i]); |
| 611 | else |
| 612 | c += sprintf(buf + c, "%s ", lid_init_state_str[i]); |
| 613 | |
| 614 | buf[c - 1] = '\n'; /* Replace the final space with a newline */ |
| 615 | |
| 616 | return c; |
Lv Zheng | 3540c32 | 2016-06-01 18:10:48 +0800 | [diff] [blame] | 617 | } |
| 618 | |
| 619 | module_param_call(lid_init_state, |
| 620 | param_set_lid_init_state, param_get_lid_init_state, |
| 621 | NULL, 0644); |
| 622 | MODULE_PARM_DESC(lid_init_state, "Behavior for reporting LID initial state"); |
| 623 | |
Ard Biesheuvel | ac1e55b | 2018-04-23 11:16:56 +0200 | [diff] [blame] | 624 | static int acpi_button_register_driver(struct acpi_driver *driver) |
| 625 | { |
| 626 | /* |
| 627 | * Modules such as nouveau.ko and i915.ko have a link time dependency |
| 628 | * on acpi_lid_open(), and would therefore not be loadable on ACPI |
| 629 | * capable kernels booted in non-ACPI mode if the return value of |
| 630 | * acpi_bus_register_driver() is returned from here with ACPI disabled |
| 631 | * when this driver is built as a module. |
| 632 | */ |
| 633 | if (acpi_disabled) |
| 634 | return 0; |
| 635 | |
| 636 | return acpi_bus_register_driver(driver); |
| 637 | } |
| 638 | |
| 639 | static void acpi_button_unregister_driver(struct acpi_driver *driver) |
| 640 | { |
| 641 | if (!acpi_disabled) |
| 642 | acpi_bus_unregister_driver(driver); |
| 643 | } |
| 644 | |
| 645 | module_driver(acpi_button_driver, acpi_button_register_driver, |
| 646 | acpi_button_unregister_driver); |