linux-imx

/*

 *  button.c - ACPI Button Driver

 *

 *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>

 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>

 *

 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2 of the License, or (at

 *  your option) any later version.

 *

 *  This program is distributed in the hope that it will be useful, but

 *  WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 *  General Public License for more details.

 *

 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 */

​

#define pr_fmt(fmt) "ACPI: button: " fmt

​

#include <linux/compiler.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/types.h>

#include <linux/proc_fs.h>

#include <linux/seq_file.h>

#include <linux/input.h>

#include <linux/slab.h>

#include <linux/acpi.h>

#include <linux/dmi.h>

#include <acpi/button.h>

​

#define PREFIX "ACPI: "

​

#define ACPI_BUTTON_CLASS       "button"

#define ACPI_BUTTON_FILE_INFO       "info"

#define ACPI_BUTTON_FILE_STATE      "state"

#define ACPI_BUTTON_TYPE_UNKNOWN    0x00

#define ACPI_BUTTON_NOTIFY_STATUS   0x80

​

#define ACPI_BUTTON_SUBCLASS_POWER  "power"

#define ACPI_BUTTON_HID_POWER       "PNP0C0C"

#define ACPI_BUTTON_DEVICE_NAME_POWER   "Power Button"

#define ACPI_BUTTON_TYPE_POWER      0x01

​

#define ACPI_BUTTON_SUBCLASS_SLEEP  "sleep"

#define ACPI_BUTTON_HID_SLEEP       "PNP0C0E"

#define ACPI_BUTTON_DEVICE_NAME_SLEEP   "Sleep Button"

#define ACPI_BUTTON_TYPE_SLEEP      0x03

​

#define ACPI_BUTTON_SUBCLASS_LID    "lid"

#define ACPI_BUTTON_HID_LID     "PNP0C0D"

#define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch"

#define ACPI_BUTTON_TYPE_LID        0x05

​

#define ACPI_BUTTON_LID_INIT_IGNORE 0x00

#define ACPI_BUTTON_LID_INIT_OPEN   0x01

#define ACPI_BUTTON_LID_INIT_METHOD 0x02

​

#define _COMPONENT      ACPI_BUTTON_COMPONENT

ACPI_MODULE_NAME("button");

​

MODULE_AUTHOR("Paul Diefenbaugh");

MODULE_DESCRIPTION("ACPI Button Driver");

MODULE_LICENSE("GPL");

​

static const struct acpi_device_id button_device_ids[] = {

    {ACPI_BUTTON_HID_LID,    0},

    {ACPI_BUTTON_HID_SLEEP,  0},

    {ACPI_BUTTON_HID_SLEEPF, 0},

    {ACPI_BUTTON_HID_POWER,  0},

    {ACPI_BUTTON_HID_POWERF, 0},

    {"", 0},

};

MODULE_DEVICE_TABLE(acpi, button_device_ids);

​

/*

 * Some devices which don't even have a lid in anyway have a broken _LID

 * method (e.g. pointing to a floating gpio pin) causing spurious LID events.

 */

static const struct dmi_system_id lid_blacklst[] = {

    {

        /* GP-electronic T701 */

        .matches = {

            DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),

            DMI_MATCH(DMI_PRODUCT_NAME, "T701"),

            DMI_MATCH(DMI_BIOS_VERSION, "BYT70A.YNCHENG.WIN.007"),

        },