msi-laptop.c

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/*-*-linux-c-*-*/

/*
  Copyright (C) 2006 Lennart Poettering <mzxreary (at) 0pointer (dot) de>

  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., 51 Franklin Street, Fifth Floor, Boston, MA
  02110-1301, USA.
 */

/*
 * msi-laptop.c - MSI S270 laptop support. This laptop is sold under
 * various brands, including "Cytron/TCM/Medion/Tchibo MD96100".
 *
 * Driver also supports S271, S420 models.
 *
 * This driver exports a few files in /sys/devices/platform/msi-laptop-pf/:
 *
 *   lcd_level - Screen brightness: contains a single integer in the
 *   range 0..8. (rw)
 *
 *   auto_brightness - Enable automatic brightness control: contains
 *   either 0 or 1. If set to 1 the hardware adjusts the screen
 *   brightness automatically when the power cord is
 *   plugged/unplugged. (rw)
 *
 *   wlan - WLAN subsystem enabled: contains either 0 or 1. (ro)
 *
 *   bluetooth - Bluetooth subsystem enabled: contains either 0 or 1
 *   Please note that this file is constantly 0 if no Bluetooth
 *   hardware is available. (ro)
 *
 * In addition to these platform device attributes the driver
 * registers itself in the Linux backlight control subsystem and is
 * available to userspace under /sys/class/backlight/msi-laptop-bl/.
 *
 * This driver might work on other laptops produced by MSI. If you
 * want to try it you can pass force=1 as argument to the module which
 * will force it to load even when the DMI data doesn't identify the
 * laptop as MSI S270. YMMV.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/dmi.h>
#include <linux/backlight.h>
#include <linux/platform_device.h>
#include <linux/rfkill.h>
#include <linux/i8042.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>

#define MSI_DRIVER_VERSION "0.5"

#define MSI_LCD_LEVEL_MAX 9

#define MSI_EC_COMMAND_WIRELESS 0x10
#define MSI_EC_COMMAND_LCD_LEVEL 0x11

#define MSI_STANDARD_EC_COMMAND_ADDRESS 0x2e
#define MSI_STANDARD_EC_BLUETOOTH_MASK  (1 << 0)
#define MSI_STANDARD_EC_WEBCAM_MASK (1 << 1)
#define MSI_STANDARD_EC_WLAN_MASK   (1 << 3)
#define MSI_STANDARD_EC_3G_MASK     (1 << 4)

/* For set SCM load flag to disable BIOS fn key */
#define MSI_STANDARD_EC_SCM_LOAD_ADDRESS    0x2d
#define MSI_STANDARD_EC_SCM_LOAD_MASK       (1 << 0)

#define MSI_STANDARD_EC_TOUCHPAD_ADDRESS    0xe4
#define MSI_STANDARD_EC_TOUCHPAD_MASK       (1 << 4)

#ifdef CONFIG_PM_SLEEP
static int msi_laptop_resume(struct device *device);
#endif
static SIMPLE_DEV_PM_OPS(msi_laptop_pm, NULL, msi_laptop_resume);

#define MSI_STANDARD_EC_DEVICES_EXISTS_ADDRESS  0x2f

static bool force;
module_param(force, bool, 0);
MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");

static int auto_brightness;
module_param(auto_brightness, int, 0);
MODULE_PARM_DESC(auto_brightness, "Enable automatic brightness control (0: disabled; 1: enabled; 2: don't touch)");

static const struct key_entry msi_laptop_keymap[] = {
    {KE_KEY, KEY_TOUCHPAD_ON, {KEY_TOUCHPAD_ON} },  /* Touch Pad On */
    {KE_KEY, KEY_TOUCHPAD_OFF, {KEY_TOUCHPAD_OFF} },/* Touch Pad On */
    {KE_END, 0}
};

static struct input_dev *msi_laptop_input_dev;

static bool old_ec_model;
static int wlan_s, bluetooth_s, threeg_s;
static int threeg_exists;

/* Some MSI 3G netbook only have one fn key to control Wlan/Bluetooth/3G,
 * those netbook will load the SCM (windows app) to disable the original
 * Wlan/Bluetooth control by BIOS when user press fn key, then control
 * Wlan/Bluetooth/3G by SCM (software control by OS). Without SCM, user
 * cann't on/off 3G module on those 3G netbook.
 * On Linux, msi-laptop driver will do the same thing to disable the
 * original BIOS control, then might need use HAL or other userland
 * application to do the software control that simulate with SCM.
 * e.g. MSI N034 netbook
 */
static bool load_scm_model;
static struct rfkill *rfk_wlan, *rfk_bluetooth, *rfk_threeg;

/* Hardware access */

static int set_lcd_level(int level)
{
    u8 buf[2];

    if (level < 0 || level >= MSI_LCD_LEVEL_MAX)
        return -EINVAL;

    buf[0] = 0x80;
    buf[1] = (u8) (level*31);

    return ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, buf, sizeof(buf),
                  NULL, 0);
}

static int get_lcd_level(void)
{
    u8 wdata = 0, rdata;
    int result;

    result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, &wdata, 1,
                &rdata, 1);
    if (result < 0)
        return result;

    return (int) rdata / 31;
}

static int get_auto_brightness(void)
{
    u8 wdata = 4, rdata;
    int result;

    result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, &wdata, 1,
                &rdata, 1);
    if (result < 0)
        return result;

    return !!(rdata & 8);
}

static int set_auto_brightness(int enable)
{
    u8 wdata[2], rdata;
    int result;

    wdata[0] = 4;

    result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, wdata, 1,
                &rdata, 1);
    if (result < 0)
        return result;

    wdata[0] = 0x84;
    wdata[1] = (rdata & 0xF7) | (enable ? 8 : 0);

    return ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, wdata, 2,
                  NULL, 0);
}

static ssize_t set_device_state(const char *buf, size_t count, u8 mask)
{
    int status;
    u8 wdata = 0, rdata;
    int result;

    if (sscanf(buf, "%i", &status) != 1 || (status < 0 || status > 1))
        return -EINVAL;

    /* read current device state */
    result = ec_read(MSI_STANDARD_EC_COMMAND_ADDRESS, &rdata);
    if (result < 0)
        return -EINVAL;

    if (!!(rdata & mask) != status) {
        /* reverse device bit */
        if (rdata & mask)
            wdata = rdata & ~mask;
        else
            wdata = rdata | mask;

        result = ec_write(MSI_STANDARD_EC_COMMAND_ADDRESS, wdata);
        if (result < 0)
            return -EINVAL;
    }

    return count;
}

static int get_wireless_state(int *wlan, int *bluetooth)
{
    u8 wdata = 0, rdata;
    int result;

    result = ec_transaction(MSI_EC_COMMAND_WIRELESS, &wdata, 1, &rdata, 1);
    if (result < 0)
        return -1;

    if (wlan)
        *wlan = !!(rdata & 8);

    if (bluetooth)
        *bluetooth = !!(rdata & 128);

    return 0;
}

static int get_wireless_state_ec_standard(void)
{
    u8 rdata;
    int result;

    result = ec_read(MSI_STANDARD_EC_COMMAND_ADDRESS, &rdata);
    if (result < 0)
        return -1;

    wlan_s = !!(rdata & MSI_STANDARD_EC_WLAN_MASK);

    bluetooth_s = !!(rdata & MSI_STANDARD_EC_BLUETOOTH_MASK);

    threeg_s = !!(rdata & MSI_STANDARD_EC_3G_MASK);

    return 0;
}

static int get_threeg_exists(void)
{
    u8 rdata;
    int result;

    result = ec_read(MSI_STANDARD_EC_DEVICES_EXISTS_ADDRESS, &rdata);
    if (result < 0)
        return -1;

    threeg_exists = !!(rdata & MSI_STANDARD_EC_3G_MASK);

    return 0;
}

/* Backlight device stuff */

static int bl_get_brightness(struct backlight_device *b)
{
    return get_lcd_level();
}


static int bl_update_status(struct backlight_device *b)
{
    return set_lcd_level(b->props.brightness);
}

static const struct backlight_ops msibl_ops = {
    .get_brightness = bl_get_brightness,
    .update_status  = bl_update_status,
};

static struct backlight_device *msibl_device;

/* Platform device */

static ssize_t show_wlan(struct device *dev,
    struct device_attribute *attr, char *buf)
{

    int ret, enabled;

    if (old_ec_model) {
        ret = get_wireless_state(&enabled, NULL);
    } else {
        ret = get_wireless_state_ec_standard();
        enabled = wlan_s;
    }
    if (ret < 0)
        return ret;

    return sprintf(buf, "%i\n", enabled);
}

static ssize_t store_wlan(struct device *dev,
    struct device_attribute *attr, const char *buf, size_t count)
{
    return set_device_state(buf, count, MSI_STANDARD_EC_WLAN_MASK);
}

static ssize_t show_bluetooth(struct device *dev,
    struct device_attribute *attr, char *buf)
{

    int ret, enabled;

    if (old_ec_model) {
        ret = get_wireless_state(NULL, &enabled);
    } else {
        ret = get_wireless_state_ec_standard();
        enabled = bluetooth_s;
    }
    if (ret < 0)
        return ret;

    return sprintf(buf, "%i\n", enabled);
}

static ssize_t store_bluetooth(struct device *dev,
    struct device_attribute *attr, const char *buf, size_t count)
{
    return set_device_state(buf, count, MSI_STANDARD_EC_BLUETOOTH_MASK);
}

static ssize_t show_threeg(struct device *dev,
    struct device_attribute *attr, char *buf)
{

    int ret;

    /* old msi ec not support 3G */
    if (old_ec_model)
        return -1;

    ret = get_wireless_state_ec_standard();
    if (ret < 0)
        return ret;

    return sprintf(buf, "%i\n", threeg_s);
}

static ssize_t store_threeg(struct device *dev,
    struct device_attribute *attr, const char *buf, size_t count)
{
    return set_device_state(buf, count, MSI_STANDARD_EC_3G_MASK);
}

static ssize_t show_lcd_level(struct device *dev,
    struct device_attribute *attr, char *buf)
{

    int ret;

    ret = get_lcd_level();
    if (ret < 0)
        return ret;

    return sprintf(buf, "%i\n", ret);
}

static ssize_t store_lcd_level(struct device *dev,
    struct device_attribute *attr, const char *buf, size_t count)
{

    int level, ret;

    if (sscanf(buf, "%i", &level) != 1 ||
        (level < 0 || level >= MSI_LCD_LEVEL_MAX))
        return -EINVAL;

    ret = set_lcd_level(level);
    if (ret < 0)
        return ret;

    return count;
}

static ssize_t show_auto_brightness(struct device *dev,
    struct device_attribute *attr, char *buf)
{

    int ret;

    ret = get_auto_brightness();
    if (ret < 0)
        return ret;

    return sprintf(buf, "%i\n", ret);
}

static ssize_t store_auto_brightness(struct device *dev,
    struct device_attribute *attr, const char *buf, size_t count)
{

    int enable, ret;

    if (sscanf(buf, "%i", &enable) != 1 || (enable != (enable & 1)))
        return -EINVAL;

    ret = set_auto_brightness(enable);
    if (ret < 0)
        return ret;

    return count;
}

static DEVICE_ATTR(lcd_level, 0644, show_lcd_level, store_lcd_level);
static DEVICE_ATTR(auto_brightness, 0644, show_auto_brightness,
           store_auto_brightness);
static DEVICE_ATTR(bluetooth, 0444, show_bluetooth, NULL);
static DEVICE_ATTR(wlan, 0444, show_wlan, NULL);
static DEVICE_ATTR(threeg, 0444, show_threeg, NULL);

static struct attribute *msipf_attributes[] = {
    &dev_attr_lcd_level.attr,
    &dev_attr_auto_brightness.attr,
    &dev_attr_bluetooth.attr,
    &dev_attr_wlan.attr,
    NULL
};

static struct attribute_group msipf_attribute_group = {
    .attrs = msipf_attributes
};

static struct platform_driver msipf_driver = {
    .driver = {
        .name = "msi-laptop-pf",
        .owner = THIS_MODULE,
        .pm = &msi_laptop_pm,
    },
};

static struct platform_device *msipf_device;

/* Initialization */

static int dmi_check_cb(const struct dmi_system_id *id)
{
    pr_info("Identified laptop model '%s'\n", id->ident);
    return 1;
}

static struct dmi_system_id __initdata msi_dmi_table[] = {
    {
        .ident = "MSI S270",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "MICRO-STAR INT'L CO.,LTD"),
            DMI_MATCH(DMI_PRODUCT_NAME, "MS-1013"),
            DMI_MATCH(DMI_PRODUCT_VERSION, "0131"),
            DMI_MATCH(DMI_CHASSIS_VENDOR,
                  "MICRO-STAR INT'L CO.,LTD")
        },
        .callback = dmi_check_cb
    },
    {
        .ident = "MSI S271",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
            DMI_MATCH(DMI_PRODUCT_NAME, "MS-1058"),
            DMI_MATCH(DMI_PRODUCT_VERSION, "0581"),
            DMI_MATCH(DMI_BOARD_NAME, "MS-1058")
        },
        .callback = dmi_check_cb
    },
    {
        .ident = "MSI S420",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
            DMI_MATCH(DMI_PRODUCT_NAME, "MS-1412"),
            DMI_MATCH(DMI_BOARD_VENDOR, "MSI"),
            DMI_MATCH(DMI_BOARD_NAME, "MS-1412")
        },
        .callback = dmi_check_cb
    },
    {
        .ident = "Medion MD96100",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "NOTEBOOK"),
            DMI_MATCH(DMI_PRODUCT_NAME, "SAM2000"),
            DMI_MATCH(DMI_PRODUCT_VERSION, "0131"),
            DMI_MATCH(DMI_CHASSIS_VENDOR,
                  "MICRO-STAR INT'L CO.,LTD")
        },
        .callback = dmi_check_cb
    },
    { }
};

static struct dmi_system_id __initdata msi_load_scm_models_dmi_table[] = {
    {
        .ident = "MSI N034",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR,
                "MICRO-STAR INTERNATIONAL CO., LTD"),
            DMI_MATCH(DMI_PRODUCT_NAME, "MS-N034"),
            DMI_MATCH(DMI_CHASSIS_VENDOR,
            "MICRO-STAR INTERNATIONAL CO., LTD")
        },
        .callback = dmi_check_cb
    },
    {
        .ident = "MSI N051",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR,
                "MICRO-STAR INTERNATIONAL CO., LTD"),
            DMI_MATCH(DMI_PRODUCT_NAME, "MS-N051"),
            DMI_MATCH(DMI_CHASSIS_VENDOR,
            "MICRO-STAR INTERNATIONAL CO., LTD")
        },
        .callback = dmi_check_cb
    },
    {
        .ident = "MSI N014",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR,
                "MICRO-STAR INTERNATIONAL CO., LTD"),
            DMI_MATCH(DMI_PRODUCT_NAME, "MS-N014"),
        },
        .callback = dmi_check_cb
    },
    {
        .ident = "MSI CR620",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR,
                "Micro-Star International"),
            DMI_MATCH(DMI_PRODUCT_NAME, "CR620"),
        },
        .callback = dmi_check_cb
    },
    {
        .ident = "MSI U270",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR,
                "Micro-Star International Co., Ltd."),
            DMI_MATCH(DMI_PRODUCT_NAME, "U270 series"),
        },
        .callback = dmi_check_cb
    },
    { }
};

static int rfkill_bluetooth_set(void *data, bool blocked)
{
    /* Do something with blocked...*/
    /*
     * blocked == false is on
     * blocked == true is off
     */
    if (blocked)
        set_device_state("0", 0, MSI_STANDARD_EC_BLUETOOTH_MASK);
    else
        set_device_state("1", 0, MSI_STANDARD_EC_BLUETOOTH_MASK);

    return 0;
}

static int rfkill_wlan_set(void *data, bool blocked)
{
    if (blocked)
        set_device_state("0", 0, MSI_STANDARD_EC_WLAN_MASK);
    else
        set_device_state("1", 0, MSI_STANDARD_EC_WLAN_MASK);

    return 0;
}

static int rfkill_threeg_set(void *data, bool blocked)
{
    if (blocked)
        set_device_state("0", 0, MSI_STANDARD_EC_3G_MASK);
    else
        set_device_state("1", 0, MSI_STANDARD_EC_3G_MASK);

    return 0;
}

static const struct rfkill_ops rfkill_bluetooth_ops = {
    .set_block = rfkill_bluetooth_set
};

static const struct rfkill_ops rfkill_wlan_ops = {
    .set_block = rfkill_wlan_set
};

static const struct rfkill_ops rfkill_threeg_ops = {
    .set_block = rfkill_threeg_set
};

static void rfkill_cleanup(void)
{
    if (rfk_bluetooth) {
        rfkill_unregister(rfk_bluetooth);
        rfkill_destroy(rfk_bluetooth);
    }

    if (rfk_threeg) {
        rfkill_unregister(rfk_threeg);
        rfkill_destroy(rfk_threeg);
    }

    if (rfk_wlan) {
        rfkill_unregister(rfk_wlan);
        rfkill_destroy(rfk_wlan);
    }
}

static void msi_update_rfkill(struct work_struct *ignored)
{
    get_wireless_state_ec_standard();

    if (rfk_wlan)
        rfkill_set_sw_state(rfk_wlan, !wlan_s);
    if (rfk_bluetooth)
        rfkill_set_sw_state(rfk_bluetooth, !bluetooth_s);
    if (rfk_threeg)
        rfkill_set_sw_state(rfk_threeg, !threeg_s);
}
static DECLARE_DELAYED_WORK(msi_rfkill_work, msi_update_rfkill);

static void msi_send_touchpad_key(struct work_struct *ignored)
{
    u8 rdata;
    int result;

    result = ec_read(MSI_STANDARD_EC_TOUCHPAD_ADDRESS, &rdata);
    if (result < 0)
        return;

    sparse_keymap_report_event(msi_laptop_input_dev,
        (rdata & MSI_STANDARD_EC_TOUCHPAD_MASK) ?
        KEY_TOUCHPAD_ON : KEY_TOUCHPAD_OFF, 1, true);
}
static DECLARE_DELAYED_WORK(msi_touchpad_work, msi_send_touchpad_key);

static bool msi_laptop_i8042_filter(unsigned char data, unsigned char str,
                struct serio *port)
{
    static bool extended;

    if (str & 0x20)
        return false;

    /* 0x54 wwan, 0x62 bluetooth, 0x76 wlan, 0xE4 touchpad toggle*/
    if (unlikely(data == 0xe0)) {
        extended = true;
        return false;
    } else if (unlikely(extended)) {
        extended = false;
        switch (data) {
        case 0xE4:
            schedule_delayed_work(&msi_touchpad_work,
                round_jiffies_relative(0.5 * HZ));
            break;
        case 0x54:
        case 0x62:
        case 0x76:
            schedule_delayed_work(&msi_rfkill_work,
                round_jiffies_relative(0.5 * HZ));
            break;
        }
    }

    return false;
}

static void msi_init_rfkill(struct work_struct *ignored)
{
    if (rfk_wlan) {
        rfkill_set_sw_state(rfk_wlan, !wlan_s);
        rfkill_wlan_set(NULL, !wlan_s);
    }
    if (rfk_bluetooth) {
        rfkill_set_sw_state(rfk_bluetooth, !bluetooth_s);
        rfkill_bluetooth_set(NULL, !bluetooth_s);
    }
    if (rfk_threeg) {
        rfkill_set_sw_state(rfk_threeg, !threeg_s);
        rfkill_threeg_set(NULL, !threeg_s);
    }
}
static DECLARE_DELAYED_WORK(msi_rfkill_init, msi_init_rfkill);

static int rfkill_init(struct platform_device *sdev)
{
    /* add rfkill */
    int retval;

    /* keep the hardware wireless state */
    get_wireless_state_ec_standard();

    rfk_bluetooth = rfkill_alloc("msi-bluetooth", &sdev->dev,
                RFKILL_TYPE_BLUETOOTH,
                &rfkill_bluetooth_ops, NULL);
    if (!rfk_bluetooth) {
        retval = -ENOMEM;
        goto err_bluetooth;
    }
    retval = rfkill_register(rfk_bluetooth);
    if (retval)
        goto err_bluetooth;

    rfk_wlan = rfkill_alloc("msi-wlan", &sdev->dev, RFKILL_TYPE_WLAN,
                &rfkill_wlan_ops, NULL);
    if (!rfk_wlan) {
        retval = -ENOMEM;
        goto err_wlan;
    }
    retval = rfkill_register(rfk_wlan);
    if (retval)
        goto err_wlan;

    if (threeg_exists) {
        rfk_threeg = rfkill_alloc("msi-threeg", &sdev->dev,
                RFKILL_TYPE_WWAN, &rfkill_threeg_ops, NULL);
        if (!rfk_threeg) {
            retval = -ENOMEM;
            goto err_threeg;
        }
        retval = rfkill_register(rfk_threeg);
        if (retval)
            goto err_threeg;
    }

    /* schedule to run rfkill state initial */
    schedule_delayed_work(&msi_rfkill_init,
                round_jiffies_relative(1 * HZ));

    return 0;

err_threeg:
    rfkill_destroy(rfk_threeg);
    if (rfk_wlan)
        rfkill_unregister(rfk_wlan);
err_wlan:
    rfkill_destroy(rfk_wlan);
    if (rfk_bluetooth)
        rfkill_unregister(rfk_bluetooth);
err_bluetooth:
    rfkill_destroy(rfk_bluetooth);

    return retval;
}

#ifdef CONFIG_PM_SLEEP
static int msi_laptop_resume(struct device *device)
{
    u8 data;
    int result;

    if (!load_scm_model)
        return 0;

    /* set load SCM to disable hardware control by fn key */
    result = ec_read(MSI_STANDARD_EC_SCM_LOAD_ADDRESS, &data);
    if (result < 0)
        return result;

    result = ec_write(MSI_STANDARD_EC_SCM_LOAD_ADDRESS,
        data | MSI_STANDARD_EC_SCM_LOAD_MASK);
    if (result < 0)
        return result;

    return 0;
}
#endif

static int __init msi_laptop_input_setup(void)
{
    int err;

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

    msi_laptop_input_dev->name = "MSI Laptop hotkeys";
    msi_laptop_input_dev->phys = "msi-laptop/input0";
    msi_laptop_input_dev->id.bustype = BUS_HOST;

    err = sparse_keymap_setup(msi_laptop_input_dev,
        msi_laptop_keymap, NULL);
    if (err)
        goto err_free_dev;

    err = input_register_device(msi_laptop_input_dev);
    if (err)
        goto err_free_keymap;

    return 0;

err_free_keymap:
    sparse_keymap_free(msi_laptop_input_dev);
err_free_dev:
    input_free_device(msi_laptop_input_dev);
    return err;
}

static void msi_laptop_input_destroy(void)
{
    sparse_keymap_free(msi_laptop_input_dev);
    input_unregister_device(msi_laptop_input_dev);
}

static int __init load_scm_model_init(struct platform_device *sdev)
{
    u8 data;
    int result;

    /* allow userland write sysfs file  */
    dev_attr_bluetooth.store = store_bluetooth;
    dev_attr_wlan.store = store_wlan;
    dev_attr_threeg.store = store_threeg;
    dev_attr_bluetooth.attr.mode |= S_IWUSR;
    dev_attr_wlan.attr.mode |= S_IWUSR;
    dev_attr_threeg.attr.mode |= S_IWUSR;

    /* disable hardware control by fn key */
    result = ec_read(MSI_STANDARD_EC_SCM_LOAD_ADDRESS, &data);
    if (result < 0)
        return result;

    result = ec_write(MSI_STANDARD_EC_SCM_LOAD_ADDRESS,
        data | MSI_STANDARD_EC_SCM_LOAD_MASK);
    if (result < 0)
        return result;

    /* initial rfkill */
    result = rfkill_init(sdev);
    if (result < 0)
        goto fail_rfkill;

    /* setup input device */
    result = msi_laptop_input_setup();
    if (result)
        goto fail_input;

    result = i8042_install_filter(msi_laptop_i8042_filter);
    if (result) {
        pr_err("Unable to install key filter\n");
        goto fail_filter;
    }

    return 0;

fail_filter:
    msi_laptop_input_destroy();

fail_input:
    rfkill_cleanup();

fail_rfkill:

    return result;

}

static int __init msi_init(void)
{
    int ret;

    if (acpi_disabled)
        return -ENODEV;

    if (force || dmi_check_system(msi_dmi_table))
        old_ec_model = 1;

    if (!old_ec_model)
        get_threeg_exists();

    if (!old_ec_model && dmi_check_system(msi_load_scm_models_dmi_table))
        load_scm_model = 1;

    if (auto_brightness < 0 || auto_brightness > 2)
        return -EINVAL;

    /* Register backlight stuff */

    if (acpi_video_backlight_support()) {
        pr_info("Brightness ignored, must be controlled by ACPI video driver\n");
    } else {
        struct backlight_properties props;
        memset(&props, 0, sizeof(struct backlight_properties));
        props.type = BACKLIGHT_PLATFORM;
        props.max_brightness = MSI_LCD_LEVEL_MAX - 1;
        msibl_device = backlight_device_register("msi-laptop-bl", NULL,
                             NULL, &msibl_ops,
                             &props);
        if (IS_ERR(msibl_device))
            return PTR_ERR(msibl_device);
    }

    ret = platform_driver_register(&msipf_driver);
    if (ret)
        goto fail_backlight;

    /* Register platform stuff */

    msipf_device = platform_device_alloc("msi-laptop-pf", -1);
    if (!msipf_device) {
        ret = -ENOMEM;
        goto fail_platform_driver;
    }

    ret = platform_device_add(msipf_device);
    if (ret)
        goto fail_platform_device1;

    if (load_scm_model && (load_scm_model_init(msipf_device) < 0)) {
        ret = -EINVAL;
        goto fail_platform_device1;
    }

    ret = sysfs_create_group(&msipf_device->dev.kobj,
                 &msipf_attribute_group);
    if (ret)
        goto fail_platform_device2;

    if (!old_ec_model) {
        if (threeg_exists)
            ret = device_create_file(&msipf_device->dev,
                        &dev_attr_threeg);
        if (ret)
            goto fail_platform_device2;
    }

    /* Disable automatic brightness control by default because
     * this module was probably loaded to do brightness control in
     * software. */

    if (auto_brightness != 2)
        set_auto_brightness(auto_brightness);

    pr_info("driver " MSI_DRIVER_VERSION " successfully loaded\n");

    return 0;

fail_platform_device2:

    if (load_scm_model) {
        i8042_remove_filter(msi_laptop_i8042_filter);
        cancel_delayed_work_sync(&msi_rfkill_work);
        rfkill_cleanup();
    }
    platform_device_del(msipf_device);

fail_platform_device1:

    platform_device_put(msipf_device);

fail_platform_driver:

    platform_driver_unregister(&msipf_driver);

fail_backlight:

    backlight_device_unregister(msibl_device);

    return ret;
}

static void __exit msi_cleanup(void)
{
    if (load_scm_model) {
        i8042_remove_filter(msi_laptop_i8042_filter);
        msi_laptop_input_destroy();
        cancel_delayed_work_sync(&msi_rfkill_work);
        rfkill_cleanup();
    }

    sysfs_remove_group(&msipf_device->dev.kobj, &msipf_attribute_group);
    if (!old_ec_model && threeg_exists)
        device_remove_file(&msipf_device->dev, &dev_attr_threeg);
    platform_device_unregister(msipf_device);
    platform_driver_unregister(&msipf_driver);
    backlight_device_unregister(msibl_device);

    /* Enable automatic brightness control again */
    if (auto_brightness != 2)
        set_auto_brightness(1);

    pr_info("driver unloaded\n");
}

module_init(msi_init);
module_exit(msi_cleanup);

MODULE_AUTHOR("Lennart Poettering");
MODULE_DESCRIPTION("MSI Laptop Support");
MODULE_VERSION(MSI_DRIVER_VERSION);
MODULE_LICENSE("GPL");

MODULE_ALIAS("dmi:*:svnMICRO-STARINT'LCO.,LTD:pnMS-1013:pvr0131*:cvnMICRO-STARINT'LCO.,LTD:ct10:*");
MODULE_ALIAS("dmi:*:svnMicro-StarInternational:pnMS-1058:pvr0581:rvnMSI:rnMS-1058:*:ct10:*");
MODULE_ALIAS("dmi:*:svnMicro-StarInternational:pnMS-1412:*:rvnMSI:rnMS-1412:*:cvnMICRO-STARINT'LCO.,LTD:ct10:*");
MODULE_ALIAS("dmi:*:svnNOTEBOOK:pnSAM2000:pvr0131*:cvnMICRO-STARINT'LCO.,LTD:ct10:*");
MODULE_ALIAS("dmi:*:svnMICRO-STARINTERNATIONAL*:pnMS-N034:*");
MODULE_ALIAS("dmi:*:svnMICRO-STARINTERNATIONAL*:pnMS-N051:*");
MODULE_ALIAS("dmi:*:svnMICRO-STARINTERNATIONAL*:pnMS-N014:*");
MODULE_ALIAS("dmi:*:svnMicro-StarInternational*:pnCR620:*");
MODULE_ALIAS("dmi:*:svnMicro-StarInternational*:pnU270series:*");