eeepc-wmi.c

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/*
 * Eee PC WMI hotkey driver
 *
 * Copyright(C) 2010 Intel Corporation.
 * Copyright(C) 2010-2011 Corentin Chary <[email protected]>
 *
 * Portions based on wistron_btns.c:
 * Copyright (C) 2005 Miloslav Trmac <[email protected]>
 * Copyright (C) 2005 Bernhard Rosenkraenzer <[email protected]>
 * Copyright (C) 2005 Dmitry Torokhov <[email protected]>
 *
 *  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.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <linux/dmi.h>
#include <linux/fb.h>
#include <acpi/acpi_bus.h>

#include "asus-wmi.h"

#define EEEPC_WMI_FILE  "eeepc-wmi"

MODULE_AUTHOR("Corentin Chary <[email protected]>");
MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver");
MODULE_LICENSE("GPL");

#define EEEPC_ACPI_HID      "ASUS010" /* old _HID used in eeepc-laptop */

#define EEEPC_WMI_EVENT_GUID    "ABBC0F72-8EA1-11D1-00A0-C90629100000"

MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID);

static bool hotplug_wireless;

module_param(hotplug_wireless, bool, 0444);
MODULE_PARM_DESC(hotplug_wireless,
         "Enable hotplug for wireless device. "
         "If your laptop needs that, please report to "
         "[email protected].");

/* Values for T101MT "Home" key */
#define HOME_PRESS  0xe4
#define HOME_HOLD   0xea
#define HOME_RELEASE    0xe5

static const struct key_entry eeepc_wmi_keymap[] = {
    /* Sleep already handled via generic ACPI code */
    { KE_KEY, 0x30, { KEY_VOLUMEUP } },
    { KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
    { KE_KEY, 0x32, { KEY_MUTE } },
    { KE_KEY, 0x5c, { KEY_F15 } }, /* Power Gear key */
    { KE_KEY, 0x5d, { KEY_WLAN } },
    { KE_KEY, 0x6b, { KEY_TOUCHPAD_TOGGLE } }, /* Toggle Touchpad */
    { KE_KEY, 0x82, { KEY_CAMERA } },
    { KE_KEY, 0x83, { KEY_CAMERA_ZOOMIN } },
    { KE_KEY, 0x88, { KEY_WLAN } },
    { KE_KEY, 0xbd, { KEY_CAMERA } },
    { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } },
    { KE_KEY, 0xe0, { KEY_PROG1 } }, /* Task Manager */
    { KE_KEY, 0xe1, { KEY_F14 } }, /* Change Resolution */
    { KE_KEY, HOME_PRESS, { KEY_CONFIG } }, /* Home/Express gate key */
    { KE_KEY, 0xe8, { KEY_SCREENLOCK } },
    { KE_KEY, 0xe9, { KEY_DISPLAYTOGGLE } },
    { KE_KEY, 0xeb, { KEY_CAMERA_ZOOMOUT } },
    { KE_KEY, 0xec, { KEY_CAMERA_UP } },
    { KE_KEY, 0xed, { KEY_CAMERA_DOWN } },
    { KE_KEY, 0xee, { KEY_CAMERA_LEFT } },
    { KE_KEY, 0xef, { KEY_CAMERA_RIGHT } },
    { KE_KEY, 0xf3, { KEY_MENU } },
    { KE_KEY, 0xf5, { KEY_HOMEPAGE } },
    { KE_KEY, 0xf6, { KEY_ESC } },
    { KE_END, 0},
};

static struct quirk_entry quirk_asus_unknown = {
};

static struct quirk_entry quirk_asus_1000h = {
    .hotplug_wireless = true,
};

static struct quirk_entry quirk_asus_et2012_type1 = {
    .store_backlight_power = true,
};

static struct quirk_entry quirk_asus_et2012_type3 = {
    .scalar_panel_brightness = true,
    .store_backlight_power = true,
};

static struct quirk_entry quirk_asus_x101ch = {
    /* We need this when ACPI function doesn't do this well */
    .wmi_backlight_power = true,
};

static struct quirk_entry *quirks;

static void et2012_quirks(void)
{
    const struct dmi_device *dev = NULL;
    char oemstring[30];

    while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
        if (sscanf(dev->name, "AEMS%24c", oemstring) == 1) {
            if (oemstring[18] == '1')
                quirks = &quirk_asus_et2012_type1;
            else if (oemstring[18] == '3')
                quirks = &quirk_asus_et2012_type3;
            break;
        }
    }
}

static int dmi_matched(const struct dmi_system_id *dmi)
{
    char *model;

    quirks = dmi->driver_data;

    model = (char *)dmi->matches[1].substr;
    if (unlikely(strncmp(model, "ET2012", 6) == 0))
        et2012_quirks();

    return 1;
}

static struct dmi_system_id asus_quirks[] = {
    {
        .callback = dmi_matched,
        .ident = "ASUSTeK Computer INC. 1000H",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
            DMI_MATCH(DMI_PRODUCT_NAME, "1000H"),
        },
        .driver_data = &quirk_asus_1000h,
    },
    {
        .callback = dmi_matched,
        .ident = "ASUSTeK Computer INC. ET2012E/I",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
            DMI_MATCH(DMI_PRODUCT_NAME, "ET2012"),
        },
        .driver_data = &quirk_asus_unknown,
    },
    {
        .callback = dmi_matched,
        .ident = "ASUSTeK Computer INC. X101CH",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
            DMI_MATCH(DMI_PRODUCT_NAME, "X101CH"),
        },
        .driver_data = &quirk_asus_x101ch,
    },
    {
        .callback = dmi_matched,
        .ident = "ASUSTeK Computer INC. 1015CX",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
            DMI_MATCH(DMI_PRODUCT_NAME, "1015CX"),
        },
        .driver_data = &quirk_asus_x101ch,
    },
    {},
};

static void eeepc_wmi_key_filter(struct asus_wmi_driver *asus_wmi, int *code,
                 unsigned int *value, bool *autorelease)
{
    switch (*code) {
    case HOME_PRESS:
        *value = 1;
        *autorelease = 0;
        break;
    case HOME_HOLD:
        *code = ASUS_WMI_KEY_IGNORE;
        break;
    case HOME_RELEASE:
        *code = HOME_PRESS;
        *value = 0;
        *autorelease = 0;
        break;
    }
}

static acpi_status eeepc_wmi_parse_device(acpi_handle handle, u32 level,
                         void *context, void **retval)
{
    pr_warn("Found legacy ATKD device (%s)\n", EEEPC_ACPI_HID);
    *(bool *)context = true;
    return AE_CTRL_TERMINATE;
}

static int eeepc_wmi_check_atkd(void)
{
    acpi_status status;
    bool found = false;

    status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device,
                  &found, NULL);

    if (ACPI_FAILURE(status) || !found)
        return 0;
    return -1;
}

static int eeepc_wmi_probe(struct platform_device *pdev)
{
    if (eeepc_wmi_check_atkd()) {
        pr_warn("WMI device present, but legacy ATKD device is also "
            "present and enabled\n");
        pr_warn("You probably booted with acpi_osi=\"Linux\" or "
            "acpi_osi=\"!Windows 2009\"\n");
        pr_warn("Can't load eeepc-wmi, use default acpi_osi "
            "(preferred) or eeepc-laptop\n");
        return -EBUSY;
    }
    return 0;
}

static void eeepc_wmi_quirks(struct asus_wmi_driver *driver)
{
    quirks = &quirk_asus_unknown;
    quirks->hotplug_wireless = hotplug_wireless;

    dmi_check_system(asus_quirks);

    driver->quirks = quirks;
    driver->quirks->wapf = -1;
    driver->panel_power = FB_BLANK_UNBLANK;
}

static struct asus_wmi_driver asus_wmi_driver = {
    .name = EEEPC_WMI_FILE,
    .owner = THIS_MODULE,
    .event_guid = EEEPC_WMI_EVENT_GUID,
    .keymap = eeepc_wmi_keymap,
    .input_name = "Eee PC WMI hotkeys",
    .input_phys = EEEPC_WMI_FILE "/input0",
    .key_filter = eeepc_wmi_key_filter,
    .probe = eeepc_wmi_probe,
    .detect_quirks = eeepc_wmi_quirks,
};


static int __init eeepc_wmi_init(void)
{
    return asus_wmi_register_driver(&asus_wmi_driver);
}

static void __exit eeepc_wmi_exit(void)
{
    asus_wmi_unregister_driver(&asus_wmi_driver);
}

module_init(eeepc_wmi_init);
module_exit(eeepc_wmi_exit);