acer-wmi.c

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/*
 *  Acer WMI Laptop Extras
 *
 *  Copyright (C) 2007-2009 Carlos Corbacho <[email protected]>
 *
 *  Based on acer_acpi:
 *    Copyright (C) 2005-2007   E.M. Smith
 *    Copyright (C) 2007-2008   Carlos Corbacho <[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/types.h>
#include <linux/dmi.h>
#include <linux/fb.h>
#include <linux/backlight.h>
#include <linux/leds.h>
#include <linux/platform_device.h>
#include <linux/acpi.h>
#include <linux/i8042.h>
#include <linux/rfkill.h>
#include <linux/workqueue.h>
#include <linux/debugfs.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>

#include <acpi/acpi_drivers.h>
#include <acpi/video.h>

MODULE_AUTHOR("Carlos Corbacho");
MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
MODULE_LICENSE("GPL");

/*
 * Magic Number
 * Meaning is unknown - this number is required for writing to ACPI for AMW0
 * (it's also used in acerhk when directly accessing the BIOS)
 */
#define ACER_AMW0_WRITE 0x9610

/*
 * Bit masks for the AMW0 interface
 */
#define ACER_AMW0_WIRELESS_MASK  0x35
#define ACER_AMW0_BLUETOOTH_MASK 0x34
#define ACER_AMW0_MAILLED_MASK   0x31

/*
 * Method IDs for WMID interface
 */
#define ACER_WMID_GET_WIRELESS_METHODID     1
#define ACER_WMID_GET_BLUETOOTH_METHODID    2
#define ACER_WMID_GET_BRIGHTNESS_METHODID   3
#define ACER_WMID_SET_WIRELESS_METHODID     4
#define ACER_WMID_SET_BLUETOOTH_METHODID    5
#define ACER_WMID_SET_BRIGHTNESS_METHODID   6
#define ACER_WMID_GET_THREEG_METHODID       10
#define ACER_WMID_SET_THREEG_METHODID       11

/*
 * Acer ACPI method GUIDs
 */
#define AMW0_GUID1      "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
#define AMW0_GUID2      "431F16ED-0C2B-444C-B267-27DEB140CF9C"
#define WMID_GUID1      "6AF4F258-B401-42FD-BE91-3D4AC2D7C0D3"
#define WMID_GUID2      "95764E09-FB56-4E83-B31A-37761F60994A"
#define WMID_GUID3      "61EF69EA-865C-4BC3-A502-A0DEBA0CB531"

/*
 * Acer ACPI event GUIDs
 */
#define ACERWMID_EVENT_GUID "676AA15E-6A47-4D9F-A2CC-1E6D18D14026"

MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
MODULE_ALIAS("wmi:6AF4F258-B401-42FD-BE91-3D4AC2D7C0D3");
MODULE_ALIAS("wmi:676AA15E-6A47-4D9F-A2CC-1E6D18D14026");

enum acer_wmi_event_ids {
    WMID_HOTKEY_EVENT = 0x1,
    WMID_ACCEL_EVENT = 0x5,
};

static const struct key_entry acer_wmi_keymap[] = {
    {KE_KEY, 0x01, {KEY_WLAN} },     /* WiFi */
    {KE_KEY, 0x03, {KEY_WLAN} },     /* WiFi */
    {KE_KEY, 0x04, {KEY_WLAN} },     /* WiFi */
    {KE_KEY, 0x12, {KEY_BLUETOOTH} },   /* BT */
    {KE_KEY, 0x21, {KEY_PROG1} },    /* Backup */
    {KE_KEY, 0x22, {KEY_PROG2} },    /* Arcade */
    {KE_KEY, 0x23, {KEY_PROG3} },    /* P_Key */
    {KE_KEY, 0x24, {KEY_PROG4} },    /* Social networking_Key */
    {KE_KEY, 0x29, {KEY_PROG3} },    /* P_Key for TM8372 */
    {KE_IGNORE, 0x41, {KEY_MUTE} },
    {KE_IGNORE, 0x42, {KEY_PREVIOUSSONG} },
    {KE_IGNORE, 0x4d, {KEY_PREVIOUSSONG} },
    {KE_IGNORE, 0x43, {KEY_NEXTSONG} },
    {KE_IGNORE, 0x4e, {KEY_NEXTSONG} },
    {KE_IGNORE, 0x44, {KEY_PLAYPAUSE} },
    {KE_IGNORE, 0x4f, {KEY_PLAYPAUSE} },
    {KE_IGNORE, 0x45, {KEY_STOP} },
    {KE_IGNORE, 0x50, {KEY_STOP} },
    {KE_IGNORE, 0x48, {KEY_VOLUMEUP} },
    {KE_IGNORE, 0x49, {KEY_VOLUMEDOWN} },
    {KE_IGNORE, 0x4a, {KEY_VOLUMEDOWN} },
    {KE_IGNORE, 0x61, {KEY_SWITCHVIDEOMODE} },
    {KE_IGNORE, 0x62, {KEY_BRIGHTNESSUP} },
    {KE_IGNORE, 0x63, {KEY_BRIGHTNESSDOWN} },
    {KE_KEY, 0x64, {KEY_SWITCHVIDEOMODE} }, /* Display Switch */
    {KE_IGNORE, 0x81, {KEY_SLEEP} },
    {KE_KEY, 0x82, {KEY_TOUCHPAD_TOGGLE} }, /* Touch Pad On/Off */
    {KE_IGNORE, 0x83, {KEY_TOUCHPAD_TOGGLE} },
    {KE_END, 0}
};

static struct input_dev *acer_wmi_input_dev;
static struct input_dev *acer_wmi_accel_dev;

struct event_return_value {
    u8 function;
    u8 key_num;
    u16 device_state;
    u32 reserved;
} __attribute__((packed));

/*
 * GUID3 Get Device Status device flags
 */
#define ACER_WMID3_GDS_WIRELESS     (1<<0)  /* WiFi */
#define ACER_WMID3_GDS_THREEG       (1<<6)  /* 3G */
#define ACER_WMID3_GDS_WIMAX        (1<<7)  /* WiMAX */
#define ACER_WMID3_GDS_BLUETOOTH    (1<<11) /* BT */

struct lm_input_params {
    u8 function_num;        /* Function Number */
    u16 commun_devices;     /* Communication type devices default status */
    u16 devices;            /* Other type devices default status */
    u8 lm_status;           /* Launch Manager Status */
    u16 reserved;
} __attribute__((packed));

struct lm_return_value {
    u8 error_code;          /* Error Code */
    u8 ec_return_value;     /* EC Return Value */
    u16 reserved;
} __attribute__((packed));

struct wmid3_gds_set_input_param {     /* Set Device Status input parameter */
    u8 function_num;        /* Function Number */
    u8 hotkey_number;       /* Hotkey Number */
    u16 devices;            /* Set Device */
    u8 volume_value;        /* Volume Value */
} __attribute__((packed));

struct wmid3_gds_get_input_param {     /* Get Device Status input parameter */
    u8 function_num;    /* Function Number */
    u8 hotkey_number;   /* Hotkey Number */
    u16 devices;        /* Get Device */
} __attribute__((packed));

struct wmid3_gds_return_value { /* Get Device Status return value*/
    u8 error_code;      /* Error Code */
    u8 ec_return_value; /* EC Return Value */
    u16 devices;        /* Current Device Status */
    u32 reserved;
} __attribute__((packed));

struct hotkey_function_type_aa {
    u8 type;
    u8 length;
    u16 handle;
    u16 commun_func_bitmap;
    u16 application_func_bitmap;
    u16 media_func_bitmap;
    u16 display_func_bitmap;
    u16 others_func_bitmap;
    u8 commun_fn_key_number;
} __attribute__((packed));

/*
 * Interface capability flags
 */
#define ACER_CAP_MAILLED        (1<<0)
#define ACER_CAP_WIRELESS       (1<<1)
#define ACER_CAP_BLUETOOTH      (1<<2)
#define ACER_CAP_BRIGHTNESS     (1<<3)
#define ACER_CAP_THREEG         (1<<4)
#define ACER_CAP_ACCEL          (1<<5)
#define ACER_CAP_ANY            (0xFFFFFFFF)

/*
 * Interface type flags
 */
enum interface_flags {
    ACER_AMW0,
    ACER_AMW0_V2,
    ACER_WMID,
    ACER_WMID_v2,
};

#define ACER_DEFAULT_WIRELESS  0
#define ACER_DEFAULT_BLUETOOTH 0
#define ACER_DEFAULT_MAILLED   0
#define ACER_DEFAULT_THREEG    0

static int max_brightness = 0xF;

static int mailled = -1;
static int brightness = -1;
static int threeg = -1;
static int force_series;
static bool ec_raw_mode;
static bool has_type_aa;
static u16 commun_func_bitmap;
static u8 commun_fn_key_number;

module_param(mailled, int, 0444);
module_param(brightness, int, 0444);
module_param(threeg, int, 0444);
module_param(force_series, int, 0444);
module_param(ec_raw_mode, bool, 0444);
MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
MODULE_PARM_DESC(force_series, "Force a different laptop series");
MODULE_PARM_DESC(ec_raw_mode, "Enable EC raw mode");

struct acer_data {
    int mailled;
    int threeg;
    int brightness;
};

struct acer_debug {
    struct dentry *root;
    struct dentry *devices;
    u32 wmid_devices;
};

static struct rfkill *wireless_rfkill;
static struct rfkill *bluetooth_rfkill;
static struct rfkill *threeg_rfkill;
static bool rfkill_inited;

/* Each low-level interface must define at least some of the following */
struct wmi_interface {
    /* The WMI device type */
    u32 type;

    /* The capabilities this interface provides */
    u32 capability;

    /* Private data for the current interface */
    struct acer_data data;

    /* debugfs entries associated with this interface */
    struct acer_debug debug;
};

/* The static interface pointer, points to the currently detected interface */
static struct wmi_interface *interface;

/*
 * Embedded Controller quirks
 * Some laptops require us to directly access the EC to either enable or query
 * features that are not available through WMI.
 */

struct quirk_entry {
    u8 wireless;
    u8 mailled;
    s8 brightness;
    u8 bluetooth;
};

static struct quirk_entry *quirks;

static void set_quirks(void)
{
    if (!interface)
        return;

    if (quirks->mailled)
        interface->capability |= ACER_CAP_MAILLED;

    if (quirks->brightness)
        interface->capability |= ACER_CAP_BRIGHTNESS;
}

static int dmi_matched(const struct dmi_system_id *dmi)
{
    quirks = dmi->driver_data;
    return 1;
}

static struct quirk_entry quirk_unknown = {
};

static struct quirk_entry quirk_acer_aspire_1520 = {
    .brightness = -1,
};

static struct quirk_entry quirk_acer_travelmate_2490 = {
    .mailled = 1,
};

/* This AMW0 laptop has no bluetooth */
static struct quirk_entry quirk_medion_md_98300 = {
    .wireless = 1,
};

static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
    .wireless = 2,
};

static struct quirk_entry quirk_lenovo_ideapad_s205 = {
    .wireless = 3,
};

/* The Aspire One has a dummy ACPI-WMI interface - disable it */
static struct dmi_system_id __devinitdata acer_blacklist[] = {
    {
        .ident = "Acer Aspire One (SSD)",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
        },
    },
    {
        .ident = "Acer Aspire One (HDD)",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
        },
    },
    {}
};

static struct dmi_system_id acer_quirks[] = {
    {
        .callback = dmi_matched,
        .ident = "Acer Aspire 1360",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
        },
        .driver_data = &quirk_acer_aspire_1520,
    },
    {
        .callback = dmi_matched,
        .ident = "Acer Aspire 1520",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
        },
        .driver_data = &quirk_acer_aspire_1520,
    },
    {
        .callback = dmi_matched,
        .ident = "Acer Aspire 3100",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
        },
        .driver_data = &quirk_acer_travelmate_2490,
    },
    {
        .callback = dmi_matched,
        .ident = "Acer Aspire 3610",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
        },
        .driver_data = &quirk_acer_travelmate_2490,
    },
    {
        .callback = dmi_matched,
        .ident = "Acer Aspire 5100",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
        },
        .driver_data = &quirk_acer_travelmate_2490,
    },
    {
        .callback = dmi_matched,
        .ident = "Acer Aspire 5610",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
        },
        .driver_data = &quirk_acer_travelmate_2490,
    },
    {
        .callback = dmi_matched,
        .ident = "Acer Aspire 5630",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
        },
        .driver_data = &quirk_acer_travelmate_2490,
    },
    {
        .callback = dmi_matched,
        .ident = "Acer Aspire 5650",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
        },
        .driver_data = &quirk_acer_travelmate_2490,
    },
    {
        .callback = dmi_matched,
        .ident = "Acer Aspire 5680",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
        },
        .driver_data = &quirk_acer_travelmate_2490,
    },
    {
        .callback = dmi_matched,
        .ident = "Acer Aspire 9110",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
        },
        .driver_data = &quirk_acer_travelmate_2490,
    },
    {
        .callback = dmi_matched,
        .ident = "Acer TravelMate 2490",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
        },
        .driver_data = &quirk_acer_travelmate_2490,
    },
    {
        .callback = dmi_matched,
        .ident = "Acer TravelMate 4200",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
        },
        .driver_data = &quirk_acer_travelmate_2490,
    },
    {
        .callback = dmi_matched,
        .ident = "Fujitsu Siemens Amilo Li 1718",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
            DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
        },
        .driver_data = &quirk_fujitsu_amilo_li_1718,
    },
    {
        .callback = dmi_matched,
        .ident = "Medion MD 98300",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
            DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
        },
        .driver_data = &quirk_medion_md_98300,
    },
    {
        .callback = dmi_matched,
        .ident = "Lenovo Ideapad S205",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
            DMI_MATCH(DMI_PRODUCT_NAME, "10382LG"),
        },
        .driver_data = &quirk_lenovo_ideapad_s205,
    },
    {
        .callback = dmi_matched,
        .ident = "Lenovo Ideapad S205 (Brazos)",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
            DMI_MATCH(DMI_PRODUCT_NAME, "Brazos"),
        },
        .driver_data = &quirk_lenovo_ideapad_s205,
    },
    {
        .callback = dmi_matched,
        .ident = "Lenovo 3000 N200",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
            DMI_MATCH(DMI_PRODUCT_NAME, "0687A31"),
        },
        .driver_data = &quirk_fujitsu_amilo_li_1718,
    },
    {}
};

static int video_set_backlight_video_vendor(const struct dmi_system_id *d)
{
    interface->capability &= ~ACER_CAP_BRIGHTNESS;
    pr_info("Brightness must be controlled by generic video driver\n");
    return 0;
}

static const struct dmi_system_id video_vendor_dmi_table[] = {
    {
        .callback = video_set_backlight_video_vendor,
        .ident = "Acer TravelMate 4750",
        .matches = {
            DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4750"),
        },
    },
    {
        .callback = video_set_backlight_video_vendor,
        .ident = "Acer Extensa 5235",
        .matches = {
            DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "Extensa 5235"),
        },
    },
    {
        .callback = video_set_backlight_video_vendor,
        .ident = "Acer TravelMate 5760",
        .matches = {
            DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5760"),
        },
    },
    {
        .callback = video_set_backlight_video_vendor,
        .ident = "Acer Aspire 5750",
        .matches = {
            DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
            DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5750"),
        },
    },
    {}
};

/* Find which quirks are needed for a particular vendor/ model pair */
static void find_quirks(void)
{
    if (!force_series) {
        dmi_check_system(acer_quirks);
    } else if (force_series == 2490) {
        quirks = &quirk_acer_travelmate_2490;
    }

    if (quirks == NULL)
        quirks = &quirk_unknown;

    set_quirks();
}

/*
 * General interface convenience methods
 */

static bool has_cap(u32 cap)
{
    if ((interface->capability & cap) != 0)
        return 1;

    return 0;
}

/*
 * AMW0 (V1) interface
 */
struct wmab_args {
    u32 eax;
    u32 ebx;
    u32 ecx;
    u32 edx;
};

struct wmab_ret {
    u32 eax;
    u32 ebx;
    u32 ecx;
    u32 edx;
    u32 eex;
};

static acpi_status wmab_execute(struct wmab_args *regbuf,
struct acpi_buffer *result)
{
    struct acpi_buffer input;
    acpi_status status;
    input.length = sizeof(struct wmab_args);
    input.pointer = (u8 *)regbuf;

    status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);

    return status;
}

static acpi_status AMW0_get_u32(u32 *value, u32 cap)
{
    int err;
    u8 result;

    switch (cap) {
    case ACER_CAP_MAILLED:
        switch (quirks->mailled) {
        default:
            err = ec_read(0xA, &result);
            if (err)
                return AE_ERROR;
            *value = (result >> 7) & 0x1;
            return AE_OK;
        }
        break;
    case ACER_CAP_WIRELESS:
        switch (quirks->wireless) {
        case 1:
            err = ec_read(0x7B, &result);
            if (err)
                return AE_ERROR;
            *value = result & 0x1;
            return AE_OK;
        case 2:
            err = ec_read(0x71, &result);
            if (err)
                return AE_ERROR;
            *value = result & 0x1;
            return AE_OK;
        case 3:
            err = ec_read(0x78, &result);
            if (err)
                return AE_ERROR;
            *value = result & 0x1;
            return AE_OK;
        default:
            err = ec_read(0xA, &result);
            if (err)
                return AE_ERROR;
            *value = (result >> 2) & 0x1;
            return AE_OK;
        }
        break;
    case ACER_CAP_BLUETOOTH:
        switch (quirks->bluetooth) {
        default:
            err = ec_read(0xA, &result);
            if (err)
                return AE_ERROR;
            *value = (result >> 4) & 0x1;
            return AE_OK;
        }
        break;
    case ACER_CAP_BRIGHTNESS:
        switch (quirks->brightness) {
        default:
            err = ec_read(0x83, &result);
            if (err)
                return AE_ERROR;
            *value = result;
            return AE_OK;
        }
        break;
    default:
        return AE_ERROR;
    }
    return AE_OK;
}

static acpi_status AMW0_set_u32(u32 value, u32 cap)
{
    struct wmab_args args;

    args.eax = ACER_AMW0_WRITE;
    args.ebx = value ? (1<<8) : 0;
    args.ecx = args.edx = 0;

    switch (cap) {
    case ACER_CAP_MAILLED:
        if (value > 1)
            return AE_BAD_PARAMETER;
        args.ebx |= ACER_AMW0_MAILLED_MASK;
        break;
    case ACER_CAP_WIRELESS:
        if (value > 1)
            return AE_BAD_PARAMETER;
        args.ebx |= ACER_AMW0_WIRELESS_MASK;
        break;
    case ACER_CAP_BLUETOOTH:
        if (value > 1)
            return AE_BAD_PARAMETER;
        args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
        break;
    case ACER_CAP_BRIGHTNESS:
        if (value > max_brightness)
            return AE_BAD_PARAMETER;
        switch (quirks->brightness) {
        default:
            return ec_write(0x83, value);
            break;
        }
    default:
        return AE_ERROR;
    }

    /* Actually do the set */
    return wmab_execute(&args, NULL);
}

static acpi_status AMW0_find_mailled(void)
{
    struct wmab_args args;
    struct wmab_ret ret;
    acpi_status status = AE_OK;
    struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
    union acpi_object *obj;

    args.eax = 0x86;
    args.ebx = args.ecx = args.edx = 0;

    status = wmab_execute(&args, &out);
    if (ACPI_FAILURE(status))
        return status;

    obj = (union acpi_object *) out.pointer;
    if (obj && obj->type == ACPI_TYPE_BUFFER &&
    obj->buffer.length == sizeof(struct wmab_ret)) {
        ret = *((struct wmab_ret *) obj->buffer.pointer);
    } else {
        kfree(out.pointer);
        return AE_ERROR;
    }

    if (ret.eex & 0x1)
        interface->capability |= ACER_CAP_MAILLED;

    kfree(out.pointer);

    return AE_OK;
}

static int AMW0_set_cap_acpi_check_device_found;

static acpi_status AMW0_set_cap_acpi_check_device_cb(acpi_handle handle,
    u32 level, void *context, void **retval)
{
    AMW0_set_cap_acpi_check_device_found = 1;
    return AE_OK;
}

static const struct acpi_device_id norfkill_ids[] = {
    { "VPC2004", 0},
    { "IBM0068", 0},
    { "LEN0068", 0},
    { "SNY5001", 0},    /* sony-laptop in charge */
    { "", 0},
};

static int AMW0_set_cap_acpi_check_device(void)
{
    const struct acpi_device_id *id;

    for (id = norfkill_ids; id->id[0]; id++)
        acpi_get_devices(id->id, AMW0_set_cap_acpi_check_device_cb,
                NULL, NULL);
    return AMW0_set_cap_acpi_check_device_found;
}

static acpi_status AMW0_set_capabilities(void)
{
    struct wmab_args args;
    struct wmab_ret ret;
    acpi_status status;
    struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
    union acpi_object *obj;

    /*
     * On laptops with this strange GUID (non Acer), normal probing doesn't
     * work.
     */
    if (wmi_has_guid(AMW0_GUID2)) {
        if ((quirks != &quirk_unknown) ||
            !AMW0_set_cap_acpi_check_device())
            interface->capability |= ACER_CAP_WIRELESS;
        return AE_OK;
    }

    args.eax = ACER_AMW0_WRITE;
    args.ecx = args.edx = 0;

    args.ebx = 0xa2 << 8;
    args.ebx |= ACER_AMW0_WIRELESS_MASK;

    status = wmab_execute(&args, &out);
    if (ACPI_FAILURE(status))
        return status;

    obj = out.pointer;
    if (obj && obj->type == ACPI_TYPE_BUFFER &&
    obj->buffer.length == sizeof(struct wmab_ret)) {
        ret = *((struct wmab_ret *) obj->buffer.pointer);
    } else {
        status = AE_ERROR;
        goto out;
    }

    if (ret.eax & 0x1)
        interface->capability |= ACER_CAP_WIRELESS;

    args.ebx = 2 << 8;
    args.ebx |= ACER_AMW0_BLUETOOTH_MASK;

    /*
     * It's ok to use existing buffer for next wmab_execute call.
     * But we need to kfree(out.pointer) if next wmab_execute fail.
     */
    status = wmab_execute(&args, &out);
    if (ACPI_FAILURE(status))
        goto out;

    obj = (union acpi_object *) out.pointer;
    if (obj && obj->type == ACPI_TYPE_BUFFER
    && obj->buffer.length == sizeof(struct wmab_ret)) {
        ret = *((struct wmab_ret *) obj->buffer.pointer);
    } else {
        status = AE_ERROR;
        goto out;
    }

    if (ret.eax & 0x1)
        interface->capability |= ACER_CAP_BLUETOOTH;

    /*
     * This appears to be safe to enable, since all Wistron based laptops
     * appear to use the same EC register for brightness, even if they
     * differ for wireless, etc
     */
    if (quirks->brightness >= 0)
        interface->capability |= ACER_CAP_BRIGHTNESS;

    status = AE_OK;
out:
    kfree(out.pointer);
    return status;
}

static struct wmi_interface AMW0_interface = {
    .type = ACER_AMW0,
};

static struct wmi_interface AMW0_V2_interface = {
    .type = ACER_AMW0_V2,
};

/*
 * New interface (The WMID interface)
 */
static acpi_status
WMI_execute_u32(u32 method_id, u32 in, u32 *out)
{
    struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
    struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
    union acpi_object *obj;
    u32 tmp;
    acpi_status status;

    status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);

    if (ACPI_FAILURE(status))
        return status;

    obj = (union acpi_object *) result.pointer;
    if (obj && obj->type == ACPI_TYPE_BUFFER &&
        (obj->buffer.length == sizeof(u32) ||
        obj->buffer.length == sizeof(u64))) {
        tmp = *((u32 *) obj->buffer.pointer);
    } else if (obj->type == ACPI_TYPE_INTEGER) {
        tmp = (u32) obj->integer.value;
    } else {
        tmp = 0;
    }

    if (out)
        *out = tmp;

    kfree(result.pointer);

    return status;
}

static acpi_status WMID_get_u32(u32 *value, u32 cap)
{
    acpi_status status;
    u8 tmp;
    u32 result, method_id = 0;

    switch (cap) {
    case ACER_CAP_WIRELESS:
        method_id = ACER_WMID_GET_WIRELESS_METHODID;
        break;
    case ACER_CAP_BLUETOOTH:
        method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
        break;
    case ACER_CAP_BRIGHTNESS:
        method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
        break;
    case ACER_CAP_THREEG:
        method_id = ACER_WMID_GET_THREEG_METHODID;
        break;
    case ACER_CAP_MAILLED:
        if (quirks->mailled == 1) {
            ec_read(0x9f, &tmp);
            *value = tmp & 0x1;
            return 0;
        }
    default:
        return AE_ERROR;
    }
    status = WMI_execute_u32(method_id, 0, &result);

    if (ACPI_SUCCESS(status))
        *value = (u8)result;

    return status;
}

static acpi_status WMID_set_u32(u32 value, u32 cap)
{
    u32 method_id = 0;
    char param;

    switch (cap) {
    case ACER_CAP_BRIGHTNESS:
        if (value > max_brightness)
            return AE_BAD_PARAMETER;
        method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
        break;
    case ACER_CAP_WIRELESS:
        if (value > 1)
            return AE_BAD_PARAMETER;
        method_id = ACER_WMID_SET_WIRELESS_METHODID;
        break;
    case ACER_CAP_BLUETOOTH:
        if (value > 1)
            return AE_BAD_PARAMETER;
        method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
        break;
    case ACER_CAP_THREEG:
        if (value > 1)
            return AE_BAD_PARAMETER;
        method_id = ACER_WMID_SET_THREEG_METHODID;
        break;
    case ACER_CAP_MAILLED:
        if (value > 1)
            return AE_BAD_PARAMETER;
        if (quirks->mailled == 1) {
            param = value ? 0x92 : 0x93;
            i8042_lock_chip();
            i8042_command(&param, 0x1059);
            i8042_unlock_chip();
            return 0;
        }
        break;
    default:
        return AE_ERROR;
    }
    return WMI_execute_u32(method_id, (u32)value, NULL);
}

static acpi_status wmid3_get_device_status(u32 *value, u16 device)
{
    struct wmid3_gds_return_value return_value;
    acpi_status status;
    union acpi_object *obj;
    struct wmid3_gds_get_input_param params = {
        .function_num = 0x1,
        .hotkey_number = commun_fn_key_number,
        .devices = device,
    };
    struct acpi_buffer input = {
        sizeof(struct wmid3_gds_get_input_param),
        &params
    };
    struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };

    status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
    if (ACPI_FAILURE(status))
        return status;

    obj = output.pointer;

    if (!obj)
        return AE_ERROR;
    else if (obj->type != ACPI_TYPE_BUFFER) {
        kfree(obj);
        return AE_ERROR;
    }
    if (obj->buffer.length != 8) {
        pr_warn("Unknown buffer length %d\n", obj->buffer.length);
        kfree(obj);
        return AE_ERROR;
    }

    return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
    kfree(obj);

    if (return_value.error_code || return_value.ec_return_value)
        pr_warn("Get 0x%x Device Status failed: 0x%x - 0x%x\n",
            device,
            return_value.error_code,
            return_value.ec_return_value);
    else
        *value = !!(return_value.devices & device);

    return status;
}

static acpi_status wmid_v2_get_u32(u32 *value, u32 cap)
{
    u16 device;

    switch (cap) {
    case ACER_CAP_WIRELESS:
        device = ACER_WMID3_GDS_WIRELESS;
        break;
    case ACER_CAP_BLUETOOTH:
        device = ACER_WMID3_GDS_BLUETOOTH;
        break;
    case ACER_CAP_THREEG:
        device = ACER_WMID3_GDS_THREEG;
        break;
    default:
        return AE_ERROR;
    }
    return wmid3_get_device_status(value, device);
}

static acpi_status wmid3_set_device_status(u32 value, u16 device)
{
    struct wmid3_gds_return_value return_value;
    acpi_status status;
    union acpi_object *obj;
    u16 devices;
    struct wmid3_gds_get_input_param get_params = {
        .function_num = 0x1,
        .hotkey_number = commun_fn_key_number,
        .devices = commun_func_bitmap,
    };
    struct acpi_buffer get_input = {
        sizeof(struct wmid3_gds_get_input_param),
        &get_params
    };
    struct wmid3_gds_set_input_param set_params = {
        .function_num = 0x2,
        .hotkey_number = commun_fn_key_number,
        .devices = commun_func_bitmap,
    };
    struct acpi_buffer set_input = {
        sizeof(struct wmid3_gds_set_input_param),
        &set_params
    };
    struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
    struct acpi_buffer output2 = { ACPI_ALLOCATE_BUFFER, NULL };

    status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &get_input, &output);
    if (ACPI_FAILURE(status))
        return status;

    obj = output.pointer;

    if (!obj)
        return AE_ERROR;
    else if (obj->type != ACPI_TYPE_BUFFER) {
        kfree(obj);
        return AE_ERROR;
    }
    if (obj->buffer.length != 8) {
        pr_warn("Unknown buffer length %d\n", obj->buffer.length);
        kfree(obj);
        return AE_ERROR;
    }

    return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
    kfree(obj);

    if (return_value.error_code || return_value.ec_return_value) {
        pr_warn("Get Current Device Status failed: 0x%x - 0x%x\n",
            return_value.error_code,
            return_value.ec_return_value);
        return status;
    }

    devices = return_value.devices;
    set_params.devices = (value) ? (devices | device) : (devices & ~device);

    status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &set_input, &output2);
    if (ACPI_FAILURE(status))
        return status;

    obj = output2.pointer;

    if (!obj)
        return AE_ERROR;
    else if (obj->type != ACPI_TYPE_BUFFER) {
        kfree(obj);
        return AE_ERROR;
    }
    if (obj->buffer.length != 4) {
        pr_warn("Unknown buffer length %d\n", obj->buffer.length);
        kfree(obj);
        return AE_ERROR;
    }

    return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
    kfree(obj);

    if (return_value.error_code || return_value.ec_return_value)
        pr_warn("Set Device Status failed: 0x%x - 0x%x\n",
            return_value.error_code,
            return_value.ec_return_value);

    return status;
}

static acpi_status wmid_v2_set_u32(u32 value, u32 cap)
{
    u16 device;

    switch (cap) {
    case ACER_CAP_WIRELESS:
        device = ACER_WMID3_GDS_WIRELESS;
        break;
    case ACER_CAP_BLUETOOTH:
        device = ACER_WMID3_GDS_BLUETOOTH;
        break;
    case ACER_CAP_THREEG:
        device = ACER_WMID3_GDS_THREEG;
        break;
    default:
        return AE_ERROR;
    }
    return wmid3_set_device_status(value, device);
}

static void type_aa_dmi_decode(const struct dmi_header *header, void *dummy)
{
    struct hotkey_function_type_aa *type_aa;

    /* We are looking for OEM-specific Type AAh */
    if (header->type != 0xAA)
        return;

    has_type_aa = true;
    type_aa = (struct hotkey_function_type_aa *) header;

    pr_info("Function bitmap for Communication Button: 0x%x\n",
        type_aa->commun_func_bitmap);
    commun_func_bitmap = type_aa->commun_func_bitmap;

    if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_WIRELESS)
        interface->capability |= ACER_CAP_WIRELESS;
    if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_THREEG)
        interface->capability |= ACER_CAP_THREEG;
    if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
        interface->capability |= ACER_CAP_BLUETOOTH;

    commun_fn_key_number = type_aa->commun_fn_key_number;
}

static acpi_status WMID_set_capabilities(void)
{
    struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
    union acpi_object *obj;
    acpi_status status;
    u32 devices;

    status = wmi_query_block(WMID_GUID2, 1, &out);
    if (ACPI_FAILURE(status))
        return status;

    obj = (union acpi_object *) out.pointer;
    if (obj && obj->type == ACPI_TYPE_BUFFER &&
        (obj->buffer.length == sizeof(u32) ||
        obj->buffer.length == sizeof(u64))) {
        devices = *((u32 *) obj->buffer.pointer);
    } else if (obj->type == ACPI_TYPE_INTEGER) {
        devices = (u32) obj->integer.value;
    } else {
        kfree(out.pointer);
        return AE_ERROR;
    }

    pr_info("Function bitmap for Communication Device: 0x%x\n", devices);
    if (devices & 0x07)
        interface->capability |= ACER_CAP_WIRELESS;
    if (devices & 0x40)
        interface->capability |= ACER_CAP_THREEG;
    if (devices & 0x10)
        interface->capability |= ACER_CAP_BLUETOOTH;

    if (!(devices & 0x20))
        max_brightness = 0x9;

    kfree(out.pointer);
    return status;
}

static struct wmi_interface wmid_interface = {
    .type = ACER_WMID,
};

static struct wmi_interface wmid_v2_interface = {
    .type = ACER_WMID_v2,
};

/*
 * Generic Device (interface-independent)
 */

static acpi_status get_u32(u32 *value, u32 cap)
{
    acpi_status status = AE_ERROR;

    switch (interface->type) {
    case ACER_AMW0:
        status = AMW0_get_u32(value, cap);
        break;
    case ACER_AMW0_V2:
        if (cap == ACER_CAP_MAILLED) {
            status = AMW0_get_u32(value, cap);
            break;
        }
    case ACER_WMID:
        status = WMID_get_u32(value, cap);
        break;
    case ACER_WMID_v2:
        if (cap & (ACER_CAP_WIRELESS |
               ACER_CAP_BLUETOOTH |
               ACER_CAP_THREEG))
            status = wmid_v2_get_u32(value, cap);
        else if (wmi_has_guid(WMID_GUID2))
            status = WMID_get_u32(value, cap);
        break;
    }

    return status;
}

static acpi_status set_u32(u32 value, u32 cap)
{
    acpi_status status;

    if (interface->capability & cap) {
        switch (interface->type) {
        case ACER_AMW0:
            return AMW0_set_u32(value, cap);
        case ACER_AMW0_V2:
            if (cap == ACER_CAP_MAILLED)
                return AMW0_set_u32(value, cap);

            /*
             * On some models, some WMID methods don't toggle
             * properly. For those cases, we want to run the AMW0
             * method afterwards to be certain we've really toggled
             * the device state.
             */
            if (cap == ACER_CAP_WIRELESS ||
                cap == ACER_CAP_BLUETOOTH) {
                status = WMID_set_u32(value, cap);
                if (ACPI_FAILURE(status))
                    return status;

                return AMW0_set_u32(value, cap);
            }
        case ACER_WMID:
            return WMID_set_u32(value, cap);
        case ACER_WMID_v2:
            if (cap & (ACER_CAP_WIRELESS |
                   ACER_CAP_BLUETOOTH |
                   ACER_CAP_THREEG))
                return wmid_v2_set_u32(value, cap);
            else if (wmi_has_guid(WMID_GUID2))
                return WMID_set_u32(value, cap);
        default:
            return AE_BAD_PARAMETER;
        }
    }
    return AE_BAD_PARAMETER;
}

static void __init acer_commandline_init(void)
{
    /*
     * These will all fail silently if the value given is invalid, or the
     * capability isn't available on the given interface
     */
    if (mailled >= 0)
        set_u32(mailled, ACER_CAP_MAILLED);
    if (!has_type_aa && threeg >= 0)
        set_u32(threeg, ACER_CAP_THREEG);
    if (brightness >= 0)
        set_u32(brightness, ACER_CAP_BRIGHTNESS);
}

/*
 * LED device (Mail LED only, no other LEDs known yet)
 */
static void mail_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
    set_u32(value, ACER_CAP_MAILLED);
}

static struct led_classdev mail_led = {
    .name = "acer-wmi::mail",
    .brightness_set = mail_led_set,
};

static int __devinit acer_led_init(struct device *dev)
{
    return led_classdev_register(dev, &mail_led);
}

static void acer_led_exit(void)
{
    set_u32(LED_OFF, ACER_CAP_MAILLED);
    led_classdev_unregister(&mail_led);
}

/*
 * Backlight device
 */
static struct backlight_device *acer_backlight_device;

static int read_brightness(struct backlight_device *bd)
{
    u32 value;
    get_u32(&value, ACER_CAP_BRIGHTNESS);
    return value;
}

static int update_bl_status(struct backlight_device *bd)
{
    int intensity = bd->props.brightness;

    if (bd->props.power != FB_BLANK_UNBLANK)
        intensity = 0;
    if (bd->props.fb_blank != FB_BLANK_UNBLANK)
        intensity = 0;

    set_u32(intensity, ACER_CAP_BRIGHTNESS);

    return 0;
}

static const struct backlight_ops acer_bl_ops = {
    .get_brightness = read_brightness,
    .update_status = update_bl_status,
};

static int __devinit acer_backlight_init(struct device *dev)
{
    struct backlight_properties props;
    struct backlight_device *bd;

    memset(&props, 0, sizeof(struct backlight_properties));
    props.type = BACKLIGHT_PLATFORM;
    props.max_brightness = max_brightness;
    bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
                       &props);
    if (IS_ERR(bd)) {
        pr_err("Could not register Acer backlight device\n");
        acer_backlight_device = NULL;
        return PTR_ERR(bd);
    }

    acer_backlight_device = bd;

    bd->props.power = FB_BLANK_UNBLANK;
    bd->props.brightness = read_brightness(bd);
    backlight_update_status(bd);
    return 0;
}

static void acer_backlight_exit(void)
{
    backlight_device_unregister(acer_backlight_device);
}

/*
 * Accelerometer device
 */
static acpi_handle gsensor_handle;

static int acer_gsensor_init(void)
{
    acpi_status status;
    struct acpi_buffer output;
    union acpi_object out_obj;

    output.length = sizeof(out_obj);
    output.pointer = &out_obj;
    status = acpi_evaluate_object(gsensor_handle, "_INI", NULL, &output);
    if (ACPI_FAILURE(status))
        return -1;

    return 0;
}

static int acer_gsensor_open(struct input_dev *input)
{
    return acer_gsensor_init();
}

static int acer_gsensor_event(void)
{
    acpi_status status;
    struct acpi_buffer output;
    union acpi_object out_obj[5];

    if (!has_cap(ACER_CAP_ACCEL))
        return -1;

    output.length = sizeof(out_obj);
    output.pointer = out_obj;

    status = acpi_evaluate_object(gsensor_handle, "RDVL", NULL, &output);
    if (ACPI_FAILURE(status))
        return -1;

    if (out_obj->package.count != 4)
        return -1;

    input_report_abs(acer_wmi_accel_dev, ABS_X,
        (s16)out_obj->package.elements[0].integer.value);
    input_report_abs(acer_wmi_accel_dev, ABS_Y,
        (s16)out_obj->package.elements[1].integer.value);
    input_report_abs(acer_wmi_accel_dev, ABS_Z,
        (s16)out_obj->package.elements[2].integer.value);
    input_sync(acer_wmi_accel_dev);
    return 0;
}

/*
 * Rfkill devices
 */
static void acer_rfkill_update(struct work_struct *ignored);
static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
static void acer_rfkill_update(struct work_struct *ignored)
{
    u32 state;
    acpi_status status;

    if (has_cap(ACER_CAP_WIRELESS)) {
        status = get_u32(&state, ACER_CAP_WIRELESS);
        if (ACPI_SUCCESS(status)) {
            if (quirks->wireless == 3)
                rfkill_set_hw_state(wireless_rfkill, !state);
            else
                rfkill_set_sw_state(wireless_rfkill, !state);
        }
    }

    if (has_cap(ACER_CAP_BLUETOOTH)) {
        status = get_u32(&state, ACER_CAP_BLUETOOTH);
        if (ACPI_SUCCESS(status))
            rfkill_set_sw_state(bluetooth_rfkill, !state);
    }

    if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
        status = get_u32(&state, ACER_WMID3_GDS_THREEG);
        if (ACPI_SUCCESS(status))
            rfkill_set_sw_state(threeg_rfkill, !state);
    }

    schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
}

static int acer_rfkill_set(void *data, bool blocked)
{
    acpi_status status;
    u32 cap = (unsigned long)data;

    if (rfkill_inited) {
        status = set_u32(!blocked, cap);
        if (ACPI_FAILURE(status))
            return -ENODEV;
    }

    return 0;
}

static const struct rfkill_ops acer_rfkill_ops = {
    .set_block = acer_rfkill_set,
};

static struct rfkill *acer_rfkill_register(struct device *dev,
                       enum rfkill_type type,
                       char *name, u32 cap)
{
    int err;
    struct rfkill *rfkill_dev;
    u32 state;
    acpi_status status;

    rfkill_dev = rfkill_alloc(name, dev, type,
                  &acer_rfkill_ops,
                  (void *)(unsigned long)cap);
    if (!rfkill_dev)
        return ERR_PTR(-ENOMEM);

    status = get_u32(&state, cap);

    err = rfkill_register(rfkill_dev);
    if (err) {
        rfkill_destroy(rfkill_dev);
        return ERR_PTR(err);
    }

    if (ACPI_SUCCESS(status))
        rfkill_set_sw_state(rfkill_dev, !state);

    return rfkill_dev;
}

static int acer_rfkill_init(struct device *dev)
{
    int err;

    if (has_cap(ACER_CAP_WIRELESS)) {
        wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
            "acer-wireless", ACER_CAP_WIRELESS);
        if (IS_ERR(wireless_rfkill)) {
            err = PTR_ERR(wireless_rfkill);
            goto error_wireless;
        }
    }

    if (has_cap(ACER_CAP_BLUETOOTH)) {
        bluetooth_rfkill = acer_rfkill_register(dev,
            RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
            ACER_CAP_BLUETOOTH);
        if (IS_ERR(bluetooth_rfkill)) {
            err = PTR_ERR(bluetooth_rfkill);
            goto error_bluetooth;
        }
    }

    if (has_cap(ACER_CAP_THREEG)) {
        threeg_rfkill = acer_rfkill_register(dev,
            RFKILL_TYPE_WWAN, "acer-threeg",
            ACER_CAP_THREEG);
        if (IS_ERR(threeg_rfkill)) {
            err = PTR_ERR(threeg_rfkill);
            goto error_threeg;
        }
    }

    rfkill_inited = true;

    if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
        has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
        schedule_delayed_work(&acer_rfkill_work,
            round_jiffies_relative(HZ));

    return 0;

error_threeg:
    if (has_cap(ACER_CAP_BLUETOOTH)) {
        rfkill_unregister(bluetooth_rfkill);
        rfkill_destroy(bluetooth_rfkill);
    }
error_bluetooth:
    if (has_cap(ACER_CAP_WIRELESS)) {
        rfkill_unregister(wireless_rfkill);
        rfkill_destroy(wireless_rfkill);
    }
error_wireless:
    return err;
}

static void acer_rfkill_exit(void)
{
    if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
        has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
        cancel_delayed_work_sync(&acer_rfkill_work);

    if (has_cap(ACER_CAP_WIRELESS)) {
        rfkill_unregister(wireless_rfkill);
        rfkill_destroy(wireless_rfkill);
    }

    if (has_cap(ACER_CAP_BLUETOOTH)) {
        rfkill_unregister(bluetooth_rfkill);
        rfkill_destroy(bluetooth_rfkill);
    }

    if (has_cap(ACER_CAP_THREEG)) {
        rfkill_unregister(threeg_rfkill);
        rfkill_destroy(threeg_rfkill);
    }
    return;
}

/*
 * sysfs interface
 */
static ssize_t show_bool_threeg(struct device *dev,
    struct device_attribute *attr, char *buf)
{
    u32 result; \
	acpi_status status;

    pr_info("This threeg sysfs will be removed in 2012 - used by: %s\n",
        current->comm);
    status = get_u32(&result, ACER_CAP_THREEG);
    if (ACPI_SUCCESS(status))
        return sprintf(buf, "%u\n", result);
    return sprintf(buf, "Read error\n");
}

static ssize_t set_bool_threeg(struct device *dev,
    struct device_attribute *attr, const char *buf, size_t count)
{
    u32 tmp = simple_strtoul(buf, NULL, 10);
    acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
    pr_info("This threeg sysfs will be removed in 2012 - used by: %s\n",
        current->comm);
    if (ACPI_FAILURE(status))
        return -EINVAL;
    return count;
}
static DEVICE_ATTR(threeg, S_IRUGO | S_IWUSR, show_bool_threeg,
    set_bool_threeg);

static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
    char *buf)
{
    pr_info("This interface sysfs will be removed in 2012 - used by: %s\n",
        current->comm);
    switch (interface->type) {
    case ACER_AMW0:
        return sprintf(buf, "AMW0\n");
    case ACER_AMW0_V2:
        return sprintf(buf, "AMW0 v2\n");
    case ACER_WMID:
        return sprintf(buf, "WMID\n");
    case ACER_WMID_v2:
        return sprintf(buf, "WMID v2\n");
    default:
        return sprintf(buf, "Error!\n");
    }
}

static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);

static void acer_wmi_notify(u32 value, void *context)
{
    struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
    union acpi_object *obj;
    struct event_return_value return_value;
    acpi_status status;
    u16 device_state;
    const struct key_entry *key;

    status = wmi_get_event_data(value, &response);
    if (status != AE_OK) {
        pr_warn("bad event status 0x%x\n", status);
        return;
    }

    obj = (union acpi_object *)response.pointer;

    if (!obj)
        return;
    if (obj->type != ACPI_TYPE_BUFFER) {
        pr_warn("Unknown response received %d\n", obj->type);
        kfree(obj);
        return;
    }
    if (obj->buffer.length != 8) {
        pr_warn("Unknown buffer length %d\n", obj->buffer.length);
        kfree(obj);
        return;
    }

    return_value = *((struct event_return_value *)obj->buffer.pointer);
    kfree(obj);

    switch (return_value.function) {
    case WMID_HOTKEY_EVENT:
        device_state = return_value.device_state;
        pr_debug("device state: 0x%x\n", device_state);

        key = sparse_keymap_entry_from_scancode(acer_wmi_input_dev,
                            return_value.key_num);
        if (!key) {
            pr_warn("Unknown key number - 0x%x\n",
                return_value.key_num);
        } else {
            switch (key->keycode) {
            case KEY_WLAN:
            case KEY_BLUETOOTH:
                if (has_cap(ACER_CAP_WIRELESS))
                    rfkill_set_sw_state(wireless_rfkill,
                        !(device_state & ACER_WMID3_GDS_WIRELESS));
                if (has_cap(ACER_CAP_THREEG))
                    rfkill_set_sw_state(threeg_rfkill,
                        !(device_state & ACER_WMID3_GDS_THREEG));
                if (has_cap(ACER_CAP_BLUETOOTH))
                    rfkill_set_sw_state(bluetooth_rfkill,
                        !(device_state & ACER_WMID3_GDS_BLUETOOTH));
                break;
            }
            sparse_keymap_report_entry(acer_wmi_input_dev, key,
                           1, true);
        }
        break;
    case WMID_ACCEL_EVENT:
        acer_gsensor_event();
        break;
    default:
        pr_warn("Unknown function number - %d - %d\n",
            return_value.function, return_value.key_num);
        break;
    }
}

static acpi_status
wmid3_set_lm_mode(struct lm_input_params *params,
          struct lm_return_value *return_value)
{
    acpi_status status;
    union acpi_object *obj;

    struct acpi_buffer input = { sizeof(struct lm_input_params), params };
    struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };

    status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output);
    if (ACPI_FAILURE(status))
        return status;

    obj = output.pointer;

    if (!obj)
        return AE_ERROR;
    else if (obj->type != ACPI_TYPE_BUFFER) {
        kfree(obj);
        return AE_ERROR;
    }
    if (obj->buffer.length != 4) {
        pr_warn("Unknown buffer length %d\n", obj->buffer.length);
        kfree(obj);
        return AE_ERROR;
    }

    *return_value = *((struct lm_return_value *)obj->buffer.pointer);
    kfree(obj);

    return status;
}

static int acer_wmi_enable_ec_raw(void)
{
    struct lm_return_value return_value;
    acpi_status status;
    struct lm_input_params params = {
        .function_num = 0x1,
        .commun_devices = 0xFFFF,
        .devices = 0xFFFF,
        .lm_status = 0x00,            /* Launch Manager Deactive */
    };

    status = wmid3_set_lm_mode(&params, &return_value);

    if (return_value.error_code || return_value.ec_return_value)
        pr_warn("Enabling EC raw mode failed: 0x%x - 0x%x\n",
            return_value.error_code,
            return_value.ec_return_value);
    else
        pr_info("Enabled EC raw mode\n");

    return status;
}

static int acer_wmi_enable_lm(void)
{
    struct lm_return_value return_value;
    acpi_status status;
    struct lm_input_params params = {
        .function_num = 0x1,
        .commun_devices = 0xFFFF,
        .devices = 0xFFFF,
        .lm_status = 0x01,            /* Launch Manager Active */
    };

    status = wmid3_set_lm_mode(&params, &return_value);

    if (return_value.error_code || return_value.ec_return_value)
        pr_warn("Enabling Launch Manager failed: 0x%x - 0x%x\n",
            return_value.error_code,
            return_value.ec_return_value);

    return status;
}

static acpi_status __init acer_wmi_get_handle_cb(acpi_handle ah, u32 level,
                        void *ctx, void **retval)
{
    *(acpi_handle *)retval = ah;
    return AE_OK;
}

static int __init acer_wmi_get_handle(const char *name, const char *prop,
                    acpi_handle *ah)
{
    acpi_status status;
    acpi_handle handle;

    BUG_ON(!name || !ah);

    handle = NULL;
    status = acpi_get_devices(prop, acer_wmi_get_handle_cb,
                    (void *)name, &handle);

    if (ACPI_SUCCESS(status)) {
        *ah = handle;
        return 0;
    } else {
        return -ENODEV;
    }
}

static int __init acer_wmi_accel_setup(void)
{
    int err;

    err = acer_wmi_get_handle("SENR", "BST0001", &gsensor_handle);
    if (err)
        return err;

    interface->capability |= ACER_CAP_ACCEL;

    acer_wmi_accel_dev = input_allocate_device();
    if (!acer_wmi_accel_dev)
        return -ENOMEM;

    acer_wmi_accel_dev->open = acer_gsensor_open;

    acer_wmi_accel_dev->name = "Acer BMA150 accelerometer";
    acer_wmi_accel_dev->phys = "wmi/input1";
    acer_wmi_accel_dev->id.bustype = BUS_HOST;
    acer_wmi_accel_dev->evbit[0] = BIT_MASK(EV_ABS);
    input_set_abs_params(acer_wmi_accel_dev, ABS_X, -16384, 16384, 0, 0);
    input_set_abs_params(acer_wmi_accel_dev, ABS_Y, -16384, 16384, 0, 0);
    input_set_abs_params(acer_wmi_accel_dev, ABS_Z, -16384, 16384, 0, 0);

    err = input_register_device(acer_wmi_accel_dev);
    if (err)
        goto err_free_dev;

    return 0;

err_free_dev:
    input_free_device(acer_wmi_accel_dev);
    return err;
}

static void acer_wmi_accel_destroy(void)
{
    input_unregister_device(acer_wmi_accel_dev);
}

static int __init acer_wmi_input_setup(void)
{
    acpi_status status;
    int err;

    acer_wmi_input_dev = input_allocate_device();
    if (!acer_wmi_input_dev)
        return -ENOMEM;

    acer_wmi_input_dev->name = "Acer WMI hotkeys";
    acer_wmi_input_dev->phys = "wmi/input0";
    acer_wmi_input_dev->id.bustype = BUS_HOST;

    err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
    if (err)
        goto err_free_dev;

    status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
                        acer_wmi_notify, NULL);
    if (ACPI_FAILURE(status)) {
        err = -EIO;
        goto err_free_keymap;
    }

    err = input_register_device(acer_wmi_input_dev);
    if (err)
        goto err_uninstall_notifier;

    return 0;

err_uninstall_notifier:
    wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
err_free_keymap:
    sparse_keymap_free(acer_wmi_input_dev);
err_free_dev:
    input_free_device(acer_wmi_input_dev);
    return err;
}

static void acer_wmi_input_destroy(void)
{
    wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
    sparse_keymap_free(acer_wmi_input_dev);
    input_unregister_device(acer_wmi_input_dev);
}

/*
 * debugfs functions
 */
static u32 get_wmid_devices(void)
{
    struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
    union acpi_object *obj;
    acpi_status status;
    u32 devices = 0;

    status = wmi_query_block(WMID_GUID2, 1, &out);
    if (ACPI_FAILURE(status))
        return 0;

    obj = (union acpi_object *) out.pointer;
    if (obj && obj->type == ACPI_TYPE_BUFFER &&
        (obj->buffer.length == sizeof(u32) ||
        obj->buffer.length == sizeof(u64))) {
        devices = *((u32 *) obj->buffer.pointer);
    } else if (obj->type == ACPI_TYPE_INTEGER) {
        devices = (u32) obj->integer.value;
    }

    kfree(out.pointer);
    return devices;
}

/*
 * Platform device
 */
static int __devinit acer_platform_probe(struct platform_device *device)
{
    int err;

    if (has_cap(ACER_CAP_MAILLED)) {
        err = acer_led_init(&device->dev);
        if (err)
            goto error_mailled;
    }

    if (has_cap(ACER_CAP_BRIGHTNESS)) {
        err = acer_backlight_init(&device->dev);
        if (err)
            goto error_brightness;
    }

    err = acer_rfkill_init(&device->dev);
    if (err)
        goto error_rfkill;

    return err;

error_rfkill:
    if (has_cap(ACER_CAP_BRIGHTNESS))
        acer_backlight_exit();
error_brightness:
    if (has_cap(ACER_CAP_MAILLED))
        acer_led_exit();
error_mailled:
    return err;
}

static int acer_platform_remove(struct platform_device *device)
{
    if (has_cap(ACER_CAP_MAILLED))
        acer_led_exit();
    if (has_cap(ACER_CAP_BRIGHTNESS))
        acer_backlight_exit();

    acer_rfkill_exit();
    return 0;
}

static int acer_suspend(struct device *dev)
{
    u32 value;
    struct acer_data *data = &interface->data;

    if (!data)
        return -ENOMEM;

    if (has_cap(ACER_CAP_MAILLED)) {
        get_u32(&value, ACER_CAP_MAILLED);
        set_u32(LED_OFF, ACER_CAP_MAILLED);
        data->mailled = value;
    }

    if (has_cap(ACER_CAP_BRIGHTNESS)) {
        get_u32(&value, ACER_CAP_BRIGHTNESS);
        data->brightness = value;
    }

    return 0;
}

static int acer_resume(struct device *dev)
{
    struct acer_data *data = &interface->data;

    if (!data)
        return -ENOMEM;

    if (has_cap(ACER_CAP_MAILLED))
        set_u32(data->mailled, ACER_CAP_MAILLED);

    if (has_cap(ACER_CAP_BRIGHTNESS))
        set_u32(data->brightness, ACER_CAP_BRIGHTNESS);

    if (has_cap(ACER_CAP_ACCEL))
        acer_gsensor_init();

    return 0;
}

static SIMPLE_DEV_PM_OPS(acer_pm, acer_suspend, acer_resume);

static void acer_platform_shutdown(struct platform_device *device)
{
    struct acer_data *data = &interface->data;

    if (!data)
        return;

    if (has_cap(ACER_CAP_MAILLED))
        set_u32(LED_OFF, ACER_CAP_MAILLED);
}

static struct platform_driver acer_platform_driver = {
    .driver = {
        .name = "acer-wmi",
        .owner = THIS_MODULE,
        .pm = &acer_pm,
    },
    .probe = acer_platform_probe,
    .remove = acer_platform_remove,
    .shutdown = acer_platform_shutdown,
};

static struct platform_device *acer_platform_device;

static int remove_sysfs(struct platform_device *device)
{
    if (has_cap(ACER_CAP_THREEG))
        device_remove_file(&device->dev, &dev_attr_threeg);

    device_remove_file(&device->dev, &dev_attr_interface);

    return 0;
}

static int create_sysfs(void)
{
    int retval = -ENOMEM;

    if (has_cap(ACER_CAP_THREEG)) {
        retval = device_create_file(&acer_platform_device->dev,
            &dev_attr_threeg);
        if (retval)
            goto error_sysfs;
    }

    retval = device_create_file(&acer_platform_device->dev,
        &dev_attr_interface);
    if (retval)
        goto error_sysfs;

    return 0;

error_sysfs:
        remove_sysfs(acer_platform_device);
    return retval;
}

static void remove_debugfs(void)
{
    debugfs_remove(interface->debug.devices);
    debugfs_remove(interface->debug.root);
}

static int create_debugfs(void)
{
    interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
    if (!interface->debug.root) {
        pr_err("Failed to create debugfs directory");
        return -ENOMEM;
    }

    interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
                    interface->debug.root,
                    &interface->debug.wmid_devices);
    if (!interface->debug.devices)
        goto error_debugfs;

    return 0;

error_debugfs:
    remove_debugfs();
    return -ENOMEM;
}

static int __init acer_wmi_init(void)
{
    int err;

    pr_info("Acer Laptop ACPI-WMI Extras\n");

    if (dmi_check_system(acer_blacklist)) {
        pr_info("Blacklisted hardware detected - not loading\n");
        return -ENODEV;
    }

    find_quirks();

    /*
     * Detect which ACPI-WMI interface we're using.
     */
    if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
        interface = &AMW0_V2_interface;

    if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
        interface = &wmid_interface;

    if (wmi_has_guid(WMID_GUID3))
        interface = &wmid_v2_interface;

    if (interface)
        dmi_walk(type_aa_dmi_decode, NULL);

    if (wmi_has_guid(WMID_GUID2) && interface) {
        if (!has_type_aa && ACPI_FAILURE(WMID_set_capabilities())) {
            pr_err("Unable to detect available WMID devices\n");
            return -ENODEV;
        }
        /* WMID always provides brightness methods */
        interface->capability |= ACER_CAP_BRIGHTNESS;
    } else if (!wmi_has_guid(WMID_GUID2) && interface && !has_type_aa) {
        pr_err("No WMID device detection method found\n");
        return -ENODEV;
    }

    if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
        interface = &AMW0_interface;

        if (ACPI_FAILURE(AMW0_set_capabilities())) {
            pr_err("Unable to detect available AMW0 devices\n");
            return -ENODEV;
        }
    }

    if (wmi_has_guid(AMW0_GUID1))
        AMW0_find_mailled();

    if (!interface) {
        pr_err("No or unsupported WMI interface, unable to load\n");
        return -ENODEV;
    }

    set_quirks();

    if (dmi_check_system(video_vendor_dmi_table))
        acpi_video_dmi_promote_vendor();
    if (acpi_video_backlight_support()) {
        interface->capability &= ~ACER_CAP_BRIGHTNESS;
        pr_info("Brightness must be controlled by acpi video driver\n");
    } else {
        pr_info("Disabling ACPI video driver\n");
        acpi_video_unregister();
    }

    if (wmi_has_guid(WMID_GUID3)) {
        if (ec_raw_mode) {
            if (ACPI_FAILURE(acer_wmi_enable_ec_raw())) {
                pr_err("Cannot enable EC raw mode\n");
                return -ENODEV;
            }
        } else if (ACPI_FAILURE(acer_wmi_enable_lm())) {
            pr_err("Cannot enable Launch Manager mode\n");
            return -ENODEV;
        }
    } else if (ec_raw_mode) {
        pr_info("No WMID EC raw mode enable method\n");
    }

    if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
        err = acer_wmi_input_setup();
        if (err)
            return err;
    }

    acer_wmi_accel_setup();

    err = platform_driver_register(&acer_platform_driver);
    if (err) {
        pr_err("Unable to register platform driver\n");
        goto error_platform_register;
    }

    acer_platform_device = platform_device_alloc("acer-wmi", -1);
    if (!acer_platform_device) {
        err = -ENOMEM;
        goto error_device_alloc;
    }

    err = platform_device_add(acer_platform_device);
    if (err)
        goto error_device_add;

    err = create_sysfs();
    if (err)
        goto error_create_sys;

    if (wmi_has_guid(WMID_GUID2)) {
        interface->debug.wmid_devices = get_wmid_devices();
        err = create_debugfs();
        if (err)
            goto error_create_debugfs;
    }

    /* Override any initial settings with values from the commandline */
    acer_commandline_init();

    return 0;

error_create_debugfs:
    remove_sysfs(acer_platform_device);
error_create_sys:
    platform_device_del(acer_platform_device);
error_device_add:
    platform_device_put(acer_platform_device);
error_device_alloc:
    platform_driver_unregister(&acer_platform_driver);
error_platform_register:
    if (wmi_has_guid(ACERWMID_EVENT_GUID))
        acer_wmi_input_destroy();
    if (has_cap(ACER_CAP_ACCEL))
        acer_wmi_accel_destroy();

    return err;
}

static void __exit acer_wmi_exit(void)
{
    if (wmi_has_guid(ACERWMID_EVENT_GUID))
        acer_wmi_input_destroy();

    if (has_cap(ACER_CAP_ACCEL))
        acer_wmi_accel_destroy();

    remove_sysfs(acer_platform_device);
    remove_debugfs();
    platform_device_unregister(acer_platform_device);
    platform_driver_unregister(&acer_platform_driver);

    pr_info("Acer Laptop WMI Extras unloaded\n");
    return;
}

module_init(acer_wmi_init);
module_exit(acer_wmi_exit);