sony-laptop.c

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/*
 * ACPI Sony Notebook Control Driver (SNC and SPIC)
 *
 * Copyright (C) 2004-2005 Stelian Pop <[email protected]>
 * Copyright (C) 2007-2009 Mattia Dongili <[email protected]>
 *
 * Parts of this driver inspired from asus_acpi.c and ibm_acpi.c
 * which are copyrighted by their respective authors.
 *
 * The SNY6001 driver part is based on the sonypi driver which includes
 * material from:
 *
 * Copyright (C) 2001-2005 Stelian Pop <[email protected]>
 *
 * Copyright (C) 2005 Narayanan R S <[email protected]>
 *
 * Copyright (C) 2001-2002 Alcôve <www.alcove.com>
 *
 * Copyright (C) 2001 Michael Ashley <[email protected]>
 *
 * Copyright (C) 2001 Junichi Morita <[email protected]>
 *
 * Copyright (C) 2000 Takaya Kinjo <[email protected]>
 *
 * Copyright (C) 2000 Andrew Tridgell <[email protected]>
 *
 * Earlier work by Werner Almesberger, Paul `Rusty' Russell and Paul Mackerras.
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/backlight.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/dmi.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/input.h>
#include <linux/kfifo.h>
#include <linux/workqueue.h>
#include <linux/acpi.h>
#include <linux/slab.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_bus.h>
#include <asm/uaccess.h>
#include <linux/sonypi.h>
#include <linux/sony-laptop.h>
#include <linux/rfkill.h>
#ifdef CONFIG_SONYPI_COMPAT
#include <linux/poll.h>
#include <linux/miscdevice.h>
#endif

#define dprintk(fmt, ...)           \
do {                        \
    if (debug)              \
        pr_warn(fmt, ##__VA_ARGS__);    \
} while (0)

#define SONY_LAPTOP_DRIVER_VERSION  "0.6"

#define SONY_NC_CLASS       "sony-nc"
#define SONY_NC_HID     "SNY5001"
#define SONY_NC_DRIVER_NAME "Sony Notebook Control Driver"

#define SONY_PIC_CLASS      "sony-pic"
#define SONY_PIC_HID        "SNY6001"
#define SONY_PIC_DRIVER_NAME    "Sony Programmable IO Control Driver"

MODULE_AUTHOR("Stelian Pop, Mattia Dongili");
MODULE_DESCRIPTION("Sony laptop extras driver (SPIC and SNC ACPI device)");
MODULE_LICENSE("GPL");
MODULE_VERSION(SONY_LAPTOP_DRIVER_VERSION);

static int debug;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "set this to 1 (and RTFM) if you want to help "
         "the development of this driver");

static int no_spic;     /* = 0 */
module_param(no_spic, int, 0444);
MODULE_PARM_DESC(no_spic,
         "set this if you don't want to enable the SPIC device");

static int compat;      /* = 0 */
module_param(compat, int, 0444);
MODULE_PARM_DESC(compat,
         "set this if you want to enable backward compatibility mode");

static unsigned long mask = 0xffffffff;
module_param(mask, ulong, 0644);
MODULE_PARM_DESC(mask,
         "set this to the mask of event you want to enable (see doc)");

static int camera;      /* = 0 */
module_param(camera, int, 0444);
MODULE_PARM_DESC(camera,
         "set this to 1 to enable Motion Eye camera controls "
         "(only use it if you have a C1VE or C1VN model)");

#ifdef CONFIG_SONYPI_COMPAT
static int minor = -1;
module_param(minor, int, 0);
MODULE_PARM_DESC(minor,
         "minor number of the misc device for the SPIC compatibility code, "
         "default is -1 (automatic)");
#endif

static int kbd_backlight = 1;
module_param(kbd_backlight, int, 0444);
MODULE_PARM_DESC(kbd_backlight,
         "set this to 0 to disable keyboard backlight, "
         "1 to enable it (default: 0)");

static int kbd_backlight_timeout;   /* = 0 */
module_param(kbd_backlight_timeout, int, 0444);
MODULE_PARM_DESC(kbd_backlight_timeout,
         "set this to 0 to set the default 10 seconds timeout, "
         "1 for 30 seconds, 2 for 60 seconds and 3 to disable timeout "
         "(default: 0)");

#ifdef CONFIG_PM_SLEEP
static void sony_nc_kbd_backlight_resume(void);
static void sony_nc_thermal_resume(void);
#endif
static int sony_nc_kbd_backlight_setup(struct platform_device *pd,
        unsigned int handle);
static void sony_nc_kbd_backlight_cleanup(struct platform_device *pd);

static int sony_nc_battery_care_setup(struct platform_device *pd,
        unsigned int handle);
static void sony_nc_battery_care_cleanup(struct platform_device *pd);

static int sony_nc_thermal_setup(struct platform_device *pd);
static void sony_nc_thermal_cleanup(struct platform_device *pd);

static int sony_nc_lid_resume_setup(struct platform_device *pd);
static void sony_nc_lid_resume_cleanup(struct platform_device *pd);

static int sony_nc_highspeed_charging_setup(struct platform_device *pd);
static void sony_nc_highspeed_charging_cleanup(struct platform_device *pd);

static int sony_nc_touchpad_setup(struct platform_device *pd,
                  unsigned int handle);
static void sony_nc_touchpad_cleanup(struct platform_device *pd);

enum sony_nc_rfkill {
    SONY_WIFI,
    SONY_BLUETOOTH,
    SONY_WWAN,
    SONY_WIMAX,
    N_SONY_RFKILL,
};

static int sony_rfkill_handle;
static struct rfkill *sony_rfkill_devices[N_SONY_RFKILL];
static int sony_rfkill_address[N_SONY_RFKILL] = {0x300, 0x500, 0x700, 0x900};
static int sony_nc_rfkill_setup(struct acpi_device *device,
        unsigned int handle);
static void sony_nc_rfkill_cleanup(void);
static void sony_nc_rfkill_update(void);

/*********** Input Devices ***********/

#define SONY_LAPTOP_BUF_SIZE    128
struct sony_laptop_input_s {
    atomic_t        users;
    struct input_dev    *jog_dev;
    struct input_dev    *key_dev;
    struct kfifo        fifo;
    spinlock_t      fifo_lock;
    struct timer_list   release_key_timer;
};

static struct sony_laptop_input_s sony_laptop_input = {
    .users = ATOMIC_INIT(0),
};

struct sony_laptop_keypress {
    struct input_dev *dev;
    int key;
};

/* Correspondance table between sonypi events
 * and input layer indexes in the keymap
 */
static int sony_laptop_input_index[] = {
    -1, /*  0 no event */
    -1, /*  1 SONYPI_EVENT_JOGDIAL_DOWN */
    -1, /*  2 SONYPI_EVENT_JOGDIAL_UP */
    -1, /*  3 SONYPI_EVENT_JOGDIAL_DOWN_PRESSED */
    -1, /*  4 SONYPI_EVENT_JOGDIAL_UP_PRESSED */
    -1, /*  5 SONYPI_EVENT_JOGDIAL_PRESSED */
    -1, /*  6 SONYPI_EVENT_JOGDIAL_RELEASED */
     0, /*  7 SONYPI_EVENT_CAPTURE_PRESSED */
     1, /*  8 SONYPI_EVENT_CAPTURE_RELEASED */
     2, /*  9 SONYPI_EVENT_CAPTURE_PARTIALPRESSED */
     3, /* 10 SONYPI_EVENT_CAPTURE_PARTIALRELEASED */
     4, /* 11 SONYPI_EVENT_FNKEY_ESC */
     5, /* 12 SONYPI_EVENT_FNKEY_F1 */
     6, /* 13 SONYPI_EVENT_FNKEY_F2 */
     7, /* 14 SONYPI_EVENT_FNKEY_F3 */
     8, /* 15 SONYPI_EVENT_FNKEY_F4 */
     9, /* 16 SONYPI_EVENT_FNKEY_F5 */
    10, /* 17 SONYPI_EVENT_FNKEY_F6 */
    11, /* 18 SONYPI_EVENT_FNKEY_F7 */
    12, /* 19 SONYPI_EVENT_FNKEY_F8 */
    13, /* 20 SONYPI_EVENT_FNKEY_F9 */
    14, /* 21 SONYPI_EVENT_FNKEY_F10 */
    15, /* 22 SONYPI_EVENT_FNKEY_F11 */
    16, /* 23 SONYPI_EVENT_FNKEY_F12 */
    17, /* 24 SONYPI_EVENT_FNKEY_1 */
    18, /* 25 SONYPI_EVENT_FNKEY_2 */
    19, /* 26 SONYPI_EVENT_FNKEY_D */
    20, /* 27 SONYPI_EVENT_FNKEY_E */
    21, /* 28 SONYPI_EVENT_FNKEY_F */
    22, /* 29 SONYPI_EVENT_FNKEY_S */
    23, /* 30 SONYPI_EVENT_FNKEY_B */
    24, /* 31 SONYPI_EVENT_BLUETOOTH_PRESSED */
    25, /* 32 SONYPI_EVENT_PKEY_P1 */
    26, /* 33 SONYPI_EVENT_PKEY_P2 */
    27, /* 34 SONYPI_EVENT_PKEY_P3 */
    28, /* 35 SONYPI_EVENT_BACK_PRESSED */
    -1, /* 36 SONYPI_EVENT_LID_CLOSED */
    -1, /* 37 SONYPI_EVENT_LID_OPENED */
    29, /* 38 SONYPI_EVENT_BLUETOOTH_ON */
    30, /* 39 SONYPI_EVENT_BLUETOOTH_OFF */
    31, /* 40 SONYPI_EVENT_HELP_PRESSED */
    32, /* 41 SONYPI_EVENT_FNKEY_ONLY */
    33, /* 42 SONYPI_EVENT_JOGDIAL_FAST_DOWN */
    34, /* 43 SONYPI_EVENT_JOGDIAL_FAST_UP */
    35, /* 44 SONYPI_EVENT_JOGDIAL_FAST_DOWN_PRESSED */
    36, /* 45 SONYPI_EVENT_JOGDIAL_FAST_UP_PRESSED */
    37, /* 46 SONYPI_EVENT_JOGDIAL_VFAST_DOWN */
    38, /* 47 SONYPI_EVENT_JOGDIAL_VFAST_UP */
    39, /* 48 SONYPI_EVENT_JOGDIAL_VFAST_DOWN_PRESSED */
    40, /* 49 SONYPI_EVENT_JOGDIAL_VFAST_UP_PRESSED */
    41, /* 50 SONYPI_EVENT_ZOOM_PRESSED */
    42, /* 51 SONYPI_EVENT_THUMBPHRASE_PRESSED */
    43, /* 52 SONYPI_EVENT_MEYE_FACE */
    44, /* 53 SONYPI_EVENT_MEYE_OPPOSITE */
    45, /* 54 SONYPI_EVENT_MEMORYSTICK_INSERT */
    46, /* 55 SONYPI_EVENT_MEMORYSTICK_EJECT */
    -1, /* 56 SONYPI_EVENT_ANYBUTTON_RELEASED */
    -1, /* 57 SONYPI_EVENT_BATTERY_INSERT */
    -1, /* 58 SONYPI_EVENT_BATTERY_REMOVE */
    -1, /* 59 SONYPI_EVENT_FNKEY_RELEASED */
    47, /* 60 SONYPI_EVENT_WIRELESS_ON */
    48, /* 61 SONYPI_EVENT_WIRELESS_OFF */
    49, /* 62 SONYPI_EVENT_ZOOM_IN_PRESSED */
    50, /* 63 SONYPI_EVENT_ZOOM_OUT_PRESSED */
    51, /* 64 SONYPI_EVENT_CD_EJECT_PRESSED */
    52, /* 65 SONYPI_EVENT_MODEKEY_PRESSED */
    53, /* 66 SONYPI_EVENT_PKEY_P4 */
    54, /* 67 SONYPI_EVENT_PKEY_P5 */
    55, /* 68 SONYPI_EVENT_SETTINGKEY_PRESSED */
    56, /* 69 SONYPI_EVENT_VOLUME_INC_PRESSED */
    57, /* 70 SONYPI_EVENT_VOLUME_DEC_PRESSED */
    -1, /* 71 SONYPI_EVENT_BRIGHTNESS_PRESSED */
    58, /* 72 SONYPI_EVENT_MEDIA_PRESSED */
    59, /* 72 SONYPI_EVENT_VENDOR_PRESSED */
};

static int sony_laptop_input_keycode_map[] = {
    KEY_CAMERA, /*  0 SONYPI_EVENT_CAPTURE_PRESSED */
    KEY_RESERVED,   /*  1 SONYPI_EVENT_CAPTURE_RELEASED */
    KEY_RESERVED,   /*  2 SONYPI_EVENT_CAPTURE_PARTIALPRESSED */
    KEY_RESERVED,   /*  3 SONYPI_EVENT_CAPTURE_PARTIALRELEASED */
    KEY_FN_ESC, /*  4 SONYPI_EVENT_FNKEY_ESC */
    KEY_FN_F1,  /*  5 SONYPI_EVENT_FNKEY_F1 */
    KEY_FN_F2,  /*  6 SONYPI_EVENT_FNKEY_F2 */
    KEY_FN_F3,  /*  7 SONYPI_EVENT_FNKEY_F3 */
    KEY_FN_F4,  /*  8 SONYPI_EVENT_FNKEY_F4 */
    KEY_FN_F5,  /*  9 SONYPI_EVENT_FNKEY_F5 */
    KEY_FN_F6,  /* 10 SONYPI_EVENT_FNKEY_F6 */
    KEY_FN_F7,  /* 11 SONYPI_EVENT_FNKEY_F7 */
    KEY_FN_F8,  /* 12 SONYPI_EVENT_FNKEY_F8 */
    KEY_FN_F9,  /* 13 SONYPI_EVENT_FNKEY_F9 */
    KEY_FN_F10, /* 14 SONYPI_EVENT_FNKEY_F10 */
    KEY_FN_F11, /* 15 SONYPI_EVENT_FNKEY_F11 */
    KEY_FN_F12, /* 16 SONYPI_EVENT_FNKEY_F12 */
    KEY_FN_F1,  /* 17 SONYPI_EVENT_FNKEY_1 */
    KEY_FN_F2,  /* 18 SONYPI_EVENT_FNKEY_2 */
    KEY_FN_D,   /* 19 SONYPI_EVENT_FNKEY_D */
    KEY_FN_E,   /* 20 SONYPI_EVENT_FNKEY_E */
    KEY_FN_F,   /* 21 SONYPI_EVENT_FNKEY_F */
    KEY_FN_S,   /* 22 SONYPI_EVENT_FNKEY_S */
    KEY_FN_B,   /* 23 SONYPI_EVENT_FNKEY_B */
    KEY_BLUETOOTH,  /* 24 SONYPI_EVENT_BLUETOOTH_PRESSED */
    KEY_PROG1,  /* 25 SONYPI_EVENT_PKEY_P1 */
    KEY_PROG2,  /* 26 SONYPI_EVENT_PKEY_P2 */
    KEY_PROG3,  /* 27 SONYPI_EVENT_PKEY_P3 */
    KEY_BACK,   /* 28 SONYPI_EVENT_BACK_PRESSED */
    KEY_BLUETOOTH,  /* 29 SONYPI_EVENT_BLUETOOTH_ON */
    KEY_BLUETOOTH,  /* 30 SONYPI_EVENT_BLUETOOTH_OFF */
    KEY_HELP,   /* 31 SONYPI_EVENT_HELP_PRESSED */
    KEY_FN,     /* 32 SONYPI_EVENT_FNKEY_ONLY */
    KEY_RESERVED,   /* 33 SONYPI_EVENT_JOGDIAL_FAST_DOWN */
    KEY_RESERVED,   /* 34 SONYPI_EVENT_JOGDIAL_FAST_UP */
    KEY_RESERVED,   /* 35 SONYPI_EVENT_JOGDIAL_FAST_DOWN_PRESSED */
    KEY_RESERVED,   /* 36 SONYPI_EVENT_JOGDIAL_FAST_UP_PRESSED */
    KEY_RESERVED,   /* 37 SONYPI_EVENT_JOGDIAL_VFAST_DOWN */
    KEY_RESERVED,   /* 38 SONYPI_EVENT_JOGDIAL_VFAST_UP */
    KEY_RESERVED,   /* 39 SONYPI_EVENT_JOGDIAL_VFAST_DOWN_PRESSED */
    KEY_RESERVED,   /* 40 SONYPI_EVENT_JOGDIAL_VFAST_UP_PRESSED */
    KEY_ZOOM,   /* 41 SONYPI_EVENT_ZOOM_PRESSED */
    BTN_THUMB,  /* 42 SONYPI_EVENT_THUMBPHRASE_PRESSED */
    KEY_RESERVED,   /* 43 SONYPI_EVENT_MEYE_FACE */
    KEY_RESERVED,   /* 44 SONYPI_EVENT_MEYE_OPPOSITE */
    KEY_RESERVED,   /* 45 SONYPI_EVENT_MEMORYSTICK_INSERT */
    KEY_RESERVED,   /* 46 SONYPI_EVENT_MEMORYSTICK_EJECT */
    KEY_WLAN,   /* 47 SONYPI_EVENT_WIRELESS_ON */
    KEY_WLAN,   /* 48 SONYPI_EVENT_WIRELESS_OFF */
    KEY_ZOOMIN, /* 49 SONYPI_EVENT_ZOOM_IN_PRESSED */
    KEY_ZOOMOUT,    /* 50 SONYPI_EVENT_ZOOM_OUT_PRESSED */
    KEY_EJECTCD,    /* 51 SONYPI_EVENT_CD_EJECT_PRESSED */
    KEY_F13,    /* 52 SONYPI_EVENT_MODEKEY_PRESSED */
    KEY_PROG4,  /* 53 SONYPI_EVENT_PKEY_P4 */
    KEY_F14,    /* 54 SONYPI_EVENT_PKEY_P5 */
    KEY_F15,    /* 55 SONYPI_EVENT_SETTINGKEY_PRESSED */
    KEY_VOLUMEUP,   /* 56 SONYPI_EVENT_VOLUME_INC_PRESSED */
    KEY_VOLUMEDOWN, /* 57 SONYPI_EVENT_VOLUME_DEC_PRESSED */
    KEY_MEDIA,  /* 58 SONYPI_EVENT_MEDIA_PRESSED */
    KEY_VENDOR, /* 59 SONYPI_EVENT_VENDOR_PRESSED */
};

/* release buttons after a short delay if pressed */
static void do_sony_laptop_release_key(unsigned long unused)
{
    struct sony_laptop_keypress kp;
    unsigned long flags;

    spin_lock_irqsave(&sony_laptop_input.fifo_lock, flags);

    if (kfifo_out(&sony_laptop_input.fifo,
              (unsigned char *)&kp, sizeof(kp)) == sizeof(kp)) {
        input_report_key(kp.dev, kp.key, 0);
        input_sync(kp.dev);
    }

    /* If there is something in the fifo schedule next release. */
    if (kfifo_len(&sony_laptop_input.fifo) != 0)
        mod_timer(&sony_laptop_input.release_key_timer,
              jiffies + msecs_to_jiffies(10));

    spin_unlock_irqrestore(&sony_laptop_input.fifo_lock, flags);
}

/* forward event to the input subsystem */
static void sony_laptop_report_input_event(u8 event)
{
    struct input_dev *jog_dev = sony_laptop_input.jog_dev;
    struct input_dev *key_dev = sony_laptop_input.key_dev;
    struct sony_laptop_keypress kp = { NULL };
    int scancode = -1;

    if (event == SONYPI_EVENT_FNKEY_RELEASED ||
            event == SONYPI_EVENT_ANYBUTTON_RELEASED) {
        /* Nothing, not all VAIOs generate this event */
        return;
    }

    /* report events */
    switch (event) {
    /* jog_dev events */
    case SONYPI_EVENT_JOGDIAL_UP:
    case SONYPI_EVENT_JOGDIAL_UP_PRESSED:
        input_report_rel(jog_dev, REL_WHEEL, 1);
        input_sync(jog_dev);
        return;

    case SONYPI_EVENT_JOGDIAL_DOWN:
    case SONYPI_EVENT_JOGDIAL_DOWN_PRESSED:
        input_report_rel(jog_dev, REL_WHEEL, -1);
        input_sync(jog_dev);
        return;

    /* key_dev events */
    case SONYPI_EVENT_JOGDIAL_PRESSED:
        kp.key = BTN_MIDDLE;
        kp.dev = jog_dev;
        break;

    default:
        if (event >= ARRAY_SIZE(sony_laptop_input_index)) {
            dprintk("sony_laptop_report_input_event, event not known: %d\n", event);
            break;
        }
        if ((scancode = sony_laptop_input_index[event]) != -1) {
            kp.key = sony_laptop_input_keycode_map[scancode];
            if (kp.key != KEY_UNKNOWN)
                kp.dev = key_dev;
        }
        break;
    }

    if (kp.dev) {
        /* if we have a scancode we emit it so we can always
            remap the key */
        if (scancode != -1)
            input_event(kp.dev, EV_MSC, MSC_SCAN, scancode);
        input_report_key(kp.dev, kp.key, 1);
        input_sync(kp.dev);

        /* schedule key release */
        kfifo_in_locked(&sony_laptop_input.fifo,
                (unsigned char *)&kp, sizeof(kp),
                &sony_laptop_input.fifo_lock);
        mod_timer(&sony_laptop_input.release_key_timer,
              jiffies + msecs_to_jiffies(10));
    } else
        dprintk("unknown input event %.2x\n", event);
}

static int sony_laptop_setup_input(struct acpi_device *acpi_device)
{
    struct input_dev *jog_dev;
    struct input_dev *key_dev;
    int i;
    int error;

    /* don't run again if already initialized */
    if (atomic_add_return(1, &sony_laptop_input.users) > 1)
        return 0;

    /* kfifo */
    spin_lock_init(&sony_laptop_input.fifo_lock);
    error = kfifo_alloc(&sony_laptop_input.fifo,
                SONY_LAPTOP_BUF_SIZE, GFP_KERNEL);
    if (error) {
        pr_err("kfifo_alloc failed\n");
        goto err_dec_users;
    }

    setup_timer(&sony_laptop_input.release_key_timer,
            do_sony_laptop_release_key, 0);

    /* input keys */
    key_dev = input_allocate_device();
    if (!key_dev) {
        error = -ENOMEM;
        goto err_free_kfifo;
    }

    key_dev->name = "Sony Vaio Keys";
    key_dev->id.bustype = BUS_ISA;
    key_dev->id.vendor = PCI_VENDOR_ID_SONY;
    key_dev->dev.parent = &acpi_device->dev;

    /* Initialize the Input Drivers: special keys */
    input_set_capability(key_dev, EV_MSC, MSC_SCAN);

    __set_bit(EV_KEY, key_dev->evbit);
    key_dev->keycodesize = sizeof(sony_laptop_input_keycode_map[0]);
    key_dev->keycodemax = ARRAY_SIZE(sony_laptop_input_keycode_map);
    key_dev->keycode = &sony_laptop_input_keycode_map;
    for (i = 0; i < ARRAY_SIZE(sony_laptop_input_keycode_map); i++)
        __set_bit(sony_laptop_input_keycode_map[i], key_dev->keybit);
    __clear_bit(KEY_RESERVED, key_dev->keybit);

    error = input_register_device(key_dev);
    if (error)
        goto err_free_keydev;

    sony_laptop_input.key_dev = key_dev;

    /* jogdial */
    jog_dev = input_allocate_device();
    if (!jog_dev) {
        error = -ENOMEM;
        goto err_unregister_keydev;
    }

    jog_dev->name = "Sony Vaio Jogdial";
    jog_dev->id.bustype = BUS_ISA;
    jog_dev->id.vendor = PCI_VENDOR_ID_SONY;
    jog_dev->dev.parent = &acpi_device->dev;

    input_set_capability(jog_dev, EV_KEY, BTN_MIDDLE);
    input_set_capability(jog_dev, EV_REL, REL_WHEEL);

    error = input_register_device(jog_dev);
    if (error)
        goto err_free_jogdev;

    sony_laptop_input.jog_dev = jog_dev;

    return 0;

err_free_jogdev:
    input_free_device(jog_dev);

err_unregister_keydev:
    input_unregister_device(key_dev);
    /* to avoid kref underflow below at input_free_device */
    key_dev = NULL;

err_free_keydev:
    input_free_device(key_dev);

err_free_kfifo:
    kfifo_free(&sony_laptop_input.fifo);

err_dec_users:
    atomic_dec(&sony_laptop_input.users);
    return error;
}

static void sony_laptop_remove_input(void)
{
    struct sony_laptop_keypress kp = { NULL };

    /* Cleanup only after the last user has gone */
    if (!atomic_dec_and_test(&sony_laptop_input.users))
        return;

    del_timer_sync(&sony_laptop_input.release_key_timer);

    /*
     * Generate key-up events for remaining keys. Note that we don't
     * need locking since nobody is adding new events to the kfifo.
     */
    while (kfifo_out(&sony_laptop_input.fifo,
             (unsigned char *)&kp, sizeof(kp)) == sizeof(kp)) {
        input_report_key(kp.dev, kp.key, 0);
        input_sync(kp.dev);
    }

    /* destroy input devs */
    input_unregister_device(sony_laptop_input.key_dev);
    sony_laptop_input.key_dev = NULL;

    if (sony_laptop_input.jog_dev) {
        input_unregister_device(sony_laptop_input.jog_dev);
        sony_laptop_input.jog_dev = NULL;
    }

    kfifo_free(&sony_laptop_input.fifo);
}

/*********** Platform Device ***********/

static atomic_t sony_pf_users = ATOMIC_INIT(0);
static struct platform_driver sony_pf_driver = {
    .driver = {
           .name = "sony-laptop",
           .owner = THIS_MODULE,
           }
};
static struct platform_device *sony_pf_device;

static int sony_pf_add(void)
{
    int ret = 0;

    /* don't run again if already initialized */
    if (atomic_add_return(1, &sony_pf_users) > 1)
        return 0;

    ret = platform_driver_register(&sony_pf_driver);
    if (ret)
        goto out;

    sony_pf_device = platform_device_alloc("sony-laptop", -1);
    if (!sony_pf_device) {
        ret = -ENOMEM;
        goto out_platform_registered;
    }

    ret = platform_device_add(sony_pf_device);
    if (ret)
        goto out_platform_alloced;

    return 0;

      out_platform_alloced:
    platform_device_put(sony_pf_device);
    sony_pf_device = NULL;
      out_platform_registered:
    platform_driver_unregister(&sony_pf_driver);
      out:
    atomic_dec(&sony_pf_users);
    return ret;
}

static void sony_pf_remove(void)
{
    /* deregister only after the last user has gone */
    if (!atomic_dec_and_test(&sony_pf_users))
        return;

    platform_device_unregister(sony_pf_device);
    platform_driver_unregister(&sony_pf_driver);
}

/*********** SNC (SNY5001) Device ***********/

/* the device uses 1-based values, while the backlight subsystem uses
   0-based values */
#define SONY_MAX_BRIGHTNESS 8

#define SNC_VALIDATE_IN     0
#define SNC_VALIDATE_OUT    1

static ssize_t sony_nc_sysfs_show(struct device *, struct device_attribute *,
                  char *);
static ssize_t sony_nc_sysfs_store(struct device *, struct device_attribute *,
                   const char *, size_t);
static int boolean_validate(const int, const int);
static int brightness_default_validate(const int, const int);

struct sony_nc_value {
    char *name;     /* name of the entry */
    char **acpiget;     /* names of the ACPI get function */
    char **acpiset;     /* names of the ACPI set function */
    int (*validate)(const int, const int);  /* input/output validation */
    int value;      /* current setting */
    int valid;      /* Has ever been set */
    int debug;      /* active only in debug mode ? */
    struct device_attribute devattr;    /* sysfs attribute */
};

#define SNC_HANDLE_NAMES(_name, _values...) \
    static char *snc_##_name[] = { _values, NULL }

#define SNC_HANDLE(_name, _getters, _setters, _validate, _debug) \
    { \
        .name       = __stringify(_name), \
        .acpiget    = _getters, \
        .acpiset    = _setters, \
        .validate   = _validate, \
        .debug      = _debug, \
        .devattr    = __ATTR(_name, 0, sony_nc_sysfs_show, sony_nc_sysfs_store), \
    }

#define SNC_HANDLE_NULL { .name = NULL }

SNC_HANDLE_NAMES(fnkey_get, "GHKE");

SNC_HANDLE_NAMES(brightness_def_get, "GPBR");
SNC_HANDLE_NAMES(brightness_def_set, "SPBR");

SNC_HANDLE_NAMES(cdpower_get, "GCDP");
SNC_HANDLE_NAMES(cdpower_set, "SCDP", "CDPW");

SNC_HANDLE_NAMES(audiopower_get, "GAZP");
SNC_HANDLE_NAMES(audiopower_set, "AZPW");

SNC_HANDLE_NAMES(lanpower_get, "GLNP");
SNC_HANDLE_NAMES(lanpower_set, "LNPW");

SNC_HANDLE_NAMES(lidstate_get, "GLID");

SNC_HANDLE_NAMES(indicatorlamp_get, "GILS");
SNC_HANDLE_NAMES(indicatorlamp_set, "SILS");

SNC_HANDLE_NAMES(gainbass_get, "GMGB");
SNC_HANDLE_NAMES(gainbass_set, "CMGB");

SNC_HANDLE_NAMES(PID_get, "GPID");

SNC_HANDLE_NAMES(CTR_get, "GCTR");
SNC_HANDLE_NAMES(CTR_set, "SCTR");

SNC_HANDLE_NAMES(PCR_get, "GPCR");
SNC_HANDLE_NAMES(PCR_set, "SPCR");

SNC_HANDLE_NAMES(CMI_get, "GCMI");
SNC_HANDLE_NAMES(CMI_set, "SCMI");

static struct sony_nc_value sony_nc_values[] = {
    SNC_HANDLE(brightness_default, snc_brightness_def_get,
            snc_brightness_def_set, brightness_default_validate, 0),
    SNC_HANDLE(fnkey, snc_fnkey_get, NULL, NULL, 0),
    SNC_HANDLE(cdpower, snc_cdpower_get, snc_cdpower_set, boolean_validate, 0),
    SNC_HANDLE(audiopower, snc_audiopower_get, snc_audiopower_set,
            boolean_validate, 0),
    SNC_HANDLE(lanpower, snc_lanpower_get, snc_lanpower_set,
            boolean_validate, 1),
    SNC_HANDLE(lidstate, snc_lidstate_get, NULL,
            boolean_validate, 0),
    SNC_HANDLE(indicatorlamp, snc_indicatorlamp_get, snc_indicatorlamp_set,
            boolean_validate, 0),
    SNC_HANDLE(gainbass, snc_gainbass_get, snc_gainbass_set,
            boolean_validate, 0),
    /* unknown methods */
    SNC_HANDLE(PID, snc_PID_get, NULL, NULL, 1),
    SNC_HANDLE(CTR, snc_CTR_get, snc_CTR_set, NULL, 1),
    SNC_HANDLE(PCR, snc_PCR_get, snc_PCR_set, NULL, 1),
    SNC_HANDLE(CMI, snc_CMI_get, snc_CMI_set, NULL, 1),
    SNC_HANDLE_NULL
};

static acpi_handle sony_nc_acpi_handle;
static struct acpi_device *sony_nc_acpi_device = NULL;

/*
 * acpi_evaluate_object wrappers
 * all useful calls into SNC methods take one or zero parameters and return
 * integers or arrays.
 */
static union acpi_object *__call_snc_method(acpi_handle handle, char *method,
        u64 *value)
{
    union acpi_object *result = NULL;
    struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
    acpi_status status;

    if (value) {
        struct acpi_object_list params;
        union acpi_object in;
        in.type = ACPI_TYPE_INTEGER;
        in.integer.value = *value;
        params.count = 1;
        params.pointer = &in;
        status = acpi_evaluate_object(handle, method, &params, &output);
        dprintk("__call_snc_method: [%s:0x%.8x%.8x]\n", method,
                (unsigned int)(*value >> 32),
                (unsigned int)*value & 0xffffffff);
    } else {
        status = acpi_evaluate_object(handle, method, NULL, &output);
        dprintk("__call_snc_method: [%s]\n", method);
    }

    if (ACPI_FAILURE(status)) {
        pr_err("Failed to evaluate [%s]\n", method);
        return NULL;
    }

    result = (union acpi_object *) output.pointer;
    if (!result)
        dprintk("No return object [%s]\n", method);

    return result;
}

static int sony_nc_int_call(acpi_handle handle, char *name, int *value,
        int *result)
{
    union acpi_object *object = NULL;
    if (value) {
        u64 v = *value;
        object = __call_snc_method(handle, name, &v);
    } else
        object = __call_snc_method(handle, name, NULL);

    if (!object)
        return -EINVAL;

    if (object->type != ACPI_TYPE_INTEGER) {
        pr_warn("Invalid acpi_object: expected 0x%x got 0x%x\n",
                ACPI_TYPE_INTEGER, object->type);
        kfree(object);
        return -EINVAL;
    }

    if (result)
        *result = object->integer.value;

    kfree(object);
    return 0;
}

#define MIN(a, b)   (a > b ? b : a)
static int sony_nc_buffer_call(acpi_handle handle, char *name, u64 *value,
        void *buffer, size_t buflen)
{
    size_t len = len;
    union acpi_object *object = __call_snc_method(handle, name, value);

    if (!object)
        return -EINVAL;

    if (object->type == ACPI_TYPE_BUFFER)
        len = MIN(buflen, object->buffer.length);

    else if (object->type == ACPI_TYPE_INTEGER)
        len = MIN(buflen, sizeof(object->integer.value));

    else {
        pr_warn("Invalid acpi_object: expected 0x%x got 0x%x\n",
                ACPI_TYPE_BUFFER, object->type);
        kfree(object);
        return -EINVAL;
    }

    memcpy(buffer, object->buffer.pointer, len);
    kfree(object);
    return 0;
}

struct sony_nc_handles {
    u16 cap[0x10];
    struct device_attribute devattr;
};

static struct sony_nc_handles *handles;

static ssize_t sony_nc_handles_show(struct device *dev,
        struct device_attribute *attr, char *buffer)
{
    ssize_t len = 0;
    int i;

    for (i = 0; i < ARRAY_SIZE(handles->cap); i++) {
        len += snprintf(buffer + len, PAGE_SIZE - len, "0x%.4x ",
                handles->cap[i]);
    }
    len += snprintf(buffer + len, PAGE_SIZE - len, "\n");

    return len;
}

static int sony_nc_handles_setup(struct platform_device *pd)
{
    int i, r, result, arg;

    handles = kzalloc(sizeof(*handles), GFP_KERNEL);
    if (!handles)
        return -ENOMEM;

    for (i = 0; i < ARRAY_SIZE(handles->cap); i++) {
        arg = i + 0x20;
        r = sony_nc_int_call(sony_nc_acpi_handle, "SN00", &arg,
                    &result);
        if (!r) {
            dprintk("caching handle 0x%.4x (offset: 0x%.2x)\n",
                    result, i);
            handles->cap[i] = result;
        }
    }

    if (debug) {
        sysfs_attr_init(&handles->devattr.attr);
        handles->devattr.attr.name = "handles";
        handles->devattr.attr.mode = S_IRUGO;
        handles->devattr.show = sony_nc_handles_show;

        /* allow reading capabilities via sysfs */
        if (device_create_file(&pd->dev, &handles->devattr)) {
            kfree(handles);
            handles = NULL;
            return -1;
        }
    }

    return 0;
}

static int sony_nc_handles_cleanup(struct platform_device *pd)
{
    if (handles) {
        if (debug)
            device_remove_file(&pd->dev, &handles->devattr);
        kfree(handles);
        handles = NULL;
    }
    return 0;
}

static int sony_find_snc_handle(int handle)
{
    int i;

    /* not initialized yet, return early */
    if (!handles || !handle)
        return -EINVAL;

    for (i = 0; i < 0x10; i++) {
        if (handles->cap[i] == handle) {
            dprintk("found handle 0x%.4x (offset: 0x%.2x)\n",
                    handle, i);
            return i;
        }
    }
    dprintk("handle 0x%.4x not found\n", handle);
    return -EINVAL;
}

static int sony_call_snc_handle(int handle, int argument, int *result)
{
    int arg, ret = 0;
    int offset = sony_find_snc_handle(handle);

    if (offset < 0)
        return offset;

    arg = offset | argument;
    ret = sony_nc_int_call(sony_nc_acpi_handle, "SN07", &arg, result);
    dprintk("called SN07 with 0x%.4x (result: 0x%.4x)\n", arg, *result);
    return ret;
}

/*
 * sony_nc_values input/output validate functions
 */

/* brightness_default_validate:
 *
 * manipulate input output values to keep consistency with the
 * backlight framework for which brightness values are 0-based.
 */
static int brightness_default_validate(const int direction, const int value)
{
    switch (direction) {
        case SNC_VALIDATE_OUT:
            return value - 1;
        case SNC_VALIDATE_IN:
            if (value >= 0 && value < SONY_MAX_BRIGHTNESS)
                return value + 1;
    }
    return -EINVAL;
}

/* boolean_validate:
 *
 * on input validate boolean values 0/1, on output just pass the
 * received value.
 */
static int boolean_validate(const int direction, const int value)
{
    if (direction == SNC_VALIDATE_IN) {
        if (value != 0 && value != 1)
            return -EINVAL;
    }
    return value;
}

/*
 * Sysfs show/store common to all sony_nc_values
 */
static ssize_t sony_nc_sysfs_show(struct device *dev, struct device_attribute *attr,
                  char *buffer)
{
    int value, ret = 0;
    struct sony_nc_value *item =
        container_of(attr, struct sony_nc_value, devattr);

    if (!*item->acpiget)
        return -EIO;

    ret = sony_nc_int_call(sony_nc_acpi_handle, *item->acpiget, NULL,
                &value);
    if (ret < 0)
        return -EIO;

    if (item->validate)
        value = item->validate(SNC_VALIDATE_OUT, value);

    return snprintf(buffer, PAGE_SIZE, "%d\n", value);
}

static ssize_t sony_nc_sysfs_store(struct device *dev,
                   struct device_attribute *attr,
                   const char *buffer, size_t count)
{
    int value;
    int ret = 0;
    struct sony_nc_value *item =
        container_of(attr, struct sony_nc_value, devattr);

    if (!item->acpiset)
        return -EIO;

    if (count > 31)
        return -EINVAL;

    if (kstrtoint(buffer, 10, &value))
        return -EINVAL;

    if (item->validate)
        value = item->validate(SNC_VALIDATE_IN, value);

    if (value < 0)
        return value;

    ret = sony_nc_int_call(sony_nc_acpi_handle, *item->acpiset,
                   &value, NULL);
    if (ret < 0)
        return -EIO;

    item->value = value;
    item->valid = 1;
    return count;
}


/*
 * Backlight device
 */
struct sony_backlight_props {
    struct backlight_device *dev;
    int         handle;
    int         cmd_base;
    u8          offset;
    u8          maxlvl;
};
struct sony_backlight_props sony_bl_props;

static int sony_backlight_update_status(struct backlight_device *bd)
{
    int arg = bd->props.brightness + 1;
    return sony_nc_int_call(sony_nc_acpi_handle, "SBRT", &arg, NULL);
}

static int sony_backlight_get_brightness(struct backlight_device *bd)
{
    int value;

    if (sony_nc_int_call(sony_nc_acpi_handle, "GBRT", NULL, &value))
        return 0;
    /* brightness levels are 1-based, while backlight ones are 0-based */
    return value - 1;
}

static int sony_nc_get_brightness_ng(struct backlight_device *bd)
{
    int result;
    struct sony_backlight_props *sdev =
        (struct sony_backlight_props *)bl_get_data(bd);

    sony_call_snc_handle(sdev->handle, sdev->cmd_base + 0x100, &result);

    return (result & 0xff) - sdev->offset;
}

static int sony_nc_update_status_ng(struct backlight_device *bd)
{
    int value, result;
    struct sony_backlight_props *sdev =
        (struct sony_backlight_props *)bl_get_data(bd);

    value = bd->props.brightness + sdev->offset;
    if (sony_call_snc_handle(sdev->handle, sdev->cmd_base | (value << 0x10),
                &result))
        return -EIO;

    return value;
}

static const struct backlight_ops sony_backlight_ops = {
    .options = BL_CORE_SUSPENDRESUME,
    .update_status = sony_backlight_update_status,
    .get_brightness = sony_backlight_get_brightness,
};
static const struct backlight_ops sony_backlight_ng_ops = {
    .options = BL_CORE_SUSPENDRESUME,
    .update_status = sony_nc_update_status_ng,
    .get_brightness = sony_nc_get_brightness_ng,
};

/*
 * New SNC-only Vaios event mapping to driver known keys
 */
struct sony_nc_event {
    u8  data;
    u8  event;
};

static struct sony_nc_event sony_100_events[] = {
    { 0x90, SONYPI_EVENT_PKEY_P1 },
    { 0x10, SONYPI_EVENT_ANYBUTTON_RELEASED },
    { 0x91, SONYPI_EVENT_PKEY_P2 },
    { 0x11, SONYPI_EVENT_ANYBUTTON_RELEASED },
    { 0x81, SONYPI_EVENT_FNKEY_F1 },
    { 0x01, SONYPI_EVENT_FNKEY_RELEASED },
    { 0x82, SONYPI_EVENT_FNKEY_F2 },
    { 0x02, SONYPI_EVENT_FNKEY_RELEASED },
    { 0x83, SONYPI_EVENT_FNKEY_F3 },
    { 0x03, SONYPI_EVENT_FNKEY_RELEASED },
    { 0x84, SONYPI_EVENT_FNKEY_F4 },
    { 0x04, SONYPI_EVENT_FNKEY_RELEASED },
    { 0x85, SONYPI_EVENT_FNKEY_F5 },
    { 0x05, SONYPI_EVENT_FNKEY_RELEASED },
    { 0x86, SONYPI_EVENT_FNKEY_F6 },
    { 0x06, SONYPI_EVENT_FNKEY_RELEASED },
    { 0x87, SONYPI_EVENT_FNKEY_F7 },
    { 0x07, SONYPI_EVENT_FNKEY_RELEASED },
    { 0x88, SONYPI_EVENT_FNKEY_F8 },
    { 0x08, SONYPI_EVENT_FNKEY_RELEASED },
    { 0x89, SONYPI_EVENT_FNKEY_F9 },
    { 0x09, SONYPI_EVENT_FNKEY_RELEASED },
    { 0x8A, SONYPI_EVENT_FNKEY_F10 },
    { 0x0A, SONYPI_EVENT_FNKEY_RELEASED },
    { 0x8B, SONYPI_EVENT_FNKEY_F11 },
    { 0x0B, SONYPI_EVENT_FNKEY_RELEASED },
    { 0x8C, SONYPI_EVENT_FNKEY_F12 },
    { 0x0C, SONYPI_EVENT_FNKEY_RELEASED },
    { 0x9d, SONYPI_EVENT_ZOOM_PRESSED },
    { 0x1d, SONYPI_EVENT_ANYBUTTON_RELEASED },
    { 0x9f, SONYPI_EVENT_CD_EJECT_PRESSED },
    { 0x1f, SONYPI_EVENT_ANYBUTTON_RELEASED },
    { 0xa1, SONYPI_EVENT_MEDIA_PRESSED },
    { 0x21, SONYPI_EVENT_ANYBUTTON_RELEASED },
    { 0xa4, SONYPI_EVENT_CD_EJECT_PRESSED },
    { 0x24, SONYPI_EVENT_ANYBUTTON_RELEASED },
    { 0xa5, SONYPI_EVENT_VENDOR_PRESSED },
    { 0x25, SONYPI_EVENT_ANYBUTTON_RELEASED },
    { 0xa6, SONYPI_EVENT_HELP_PRESSED },
    { 0x26, SONYPI_EVENT_ANYBUTTON_RELEASED },
    { 0, 0 },
};

static struct sony_nc_event sony_127_events[] = {
    { 0x81, SONYPI_EVENT_MODEKEY_PRESSED },
    { 0x01, SONYPI_EVENT_ANYBUTTON_RELEASED },
    { 0x82, SONYPI_EVENT_PKEY_P1 },
    { 0x02, SONYPI_EVENT_ANYBUTTON_RELEASED },
    { 0x83, SONYPI_EVENT_PKEY_P2 },
    { 0x03, SONYPI_EVENT_ANYBUTTON_RELEASED },
    { 0x84, SONYPI_EVENT_PKEY_P3 },
    { 0x04, SONYPI_EVENT_ANYBUTTON_RELEASED },
    { 0x85, SONYPI_EVENT_PKEY_P4 },
    { 0x05, SONYPI_EVENT_ANYBUTTON_RELEASED },
    { 0x86, SONYPI_EVENT_PKEY_P5 },
    { 0x06, SONYPI_EVENT_ANYBUTTON_RELEASED },
    { 0x87, SONYPI_EVENT_SETTINGKEY_PRESSED },
    { 0x07, SONYPI_EVENT_ANYBUTTON_RELEASED },
    { 0, 0 },
};

static int sony_nc_hotkeys_decode(u32 event, unsigned int handle)
{
    int ret = -EINVAL;
    unsigned int result = 0;
    struct sony_nc_event *key_event;

    if (sony_call_snc_handle(handle, 0x200, &result)) {
        dprintk("Unable to decode event 0x%.2x 0x%.2x\n", handle,
                event);
        return -EINVAL;
    }

    result &= 0xFF;

    if (handle == 0x0100)
        key_event = sony_100_events;
    else
        key_event = sony_127_events;

    for (; key_event->data; key_event++) {
        if (key_event->data == result) {
            ret = key_event->event;
            break;
        }
    }

    if (!key_event->data)
        pr_info("Unknown hotkey 0x%.2x/0x%.2x (handle 0x%.2x)\n",
                event, result, handle);

    return ret;
}

/*
 * ACPI callbacks
 */
enum event_types {
    HOTKEY = 1,
    KILLSWITCH,
    GFX_SWITCH
};
static void sony_nc_notify(struct acpi_device *device, u32 event)
{
    u32 real_ev = event;
    u8 ev_type = 0;
    dprintk("sony_nc_notify, event: 0x%.2x\n", event);

    if (event >= 0x90) {
        unsigned int result = 0;
        unsigned int arg = 0;
        unsigned int handle = 0;
        unsigned int offset = event - 0x90;

        if (offset >= ARRAY_SIZE(handles->cap)) {
            pr_err("Event 0x%x outside of capabilities list\n",
                    event);
            return;
        }
        handle = handles->cap[offset];

        /* list of handles known for generating events */
        switch (handle) {
        /* hotkey event */
        case 0x0100:
        case 0x0127:
            ev_type = HOTKEY;
            real_ev = sony_nc_hotkeys_decode(event, handle);

            if (real_ev > 0)
                sony_laptop_report_input_event(real_ev);
            else
                /* restore the original event for reporting */
                real_ev = event;

            break;

        /* wlan switch */
        case 0x0124:
        case 0x0135:
            /* events on this handle are reported when the
             * switch changes position or for battery
             * events. We'll notify both of them but only
             * update the rfkill device status when the
             * switch is moved.
             */
            ev_type = KILLSWITCH;
            sony_call_snc_handle(handle, 0x0100, &result);
            real_ev = result & 0x03;

            /* hw switch event */
            if (real_ev == 1)
                sony_nc_rfkill_update();

            break;

        case 0x0128:
        case 0x0146:
            /* Hybrid GFX switching */
            sony_call_snc_handle(handle, 0x0000, &result);
            dprintk("GFX switch event received (reason: %s)\n",
                    (result & 0x01) ?
                    "switch change" : "unknown");

            /* verify the switch state
             * 1: discrete GFX
             * 0: integrated GFX
             */
            sony_call_snc_handle(handle, 0x0100, &result);

            ev_type = GFX_SWITCH;
            real_ev = result & 0xff;
            break;

        default:
            dprintk("Unknown event 0x%x for handle 0x%x\n",
                    event, handle);
            break;
        }

        /* clear the event (and the event reason when present) */
        arg = 1 << offset;
        sony_nc_int_call(sony_nc_acpi_handle, "SN05", &arg, &result);

    } else {
        /* old style event */
        ev_type = HOTKEY;
        sony_laptop_report_input_event(real_ev);
    }

    acpi_bus_generate_proc_event(sony_nc_acpi_device, ev_type, real_ev);

    acpi_bus_generate_netlink_event(sony_nc_acpi_device->pnp.device_class,
            dev_name(&sony_nc_acpi_device->dev), ev_type, real_ev);
}

static acpi_status sony_walk_callback(acpi_handle handle, u32 level,
                      void *context, void **return_value)
{
    struct acpi_device_info *info;

    if (ACPI_SUCCESS(acpi_get_object_info(handle, &info))) {
        pr_warn("method: name: %4.4s, args %X\n",
            (char *)&info->name, info->param_count);

        kfree(info);
    }

    return AE_OK;
}

/*
 * ACPI device
 */
static void sony_nc_function_setup(struct acpi_device *device,
        struct platform_device *pf_device)
{
    unsigned int i, result, bitmask, arg;

    if (!handles)
        return;

    /* setup found handles here */
    for (i = 0; i < ARRAY_SIZE(handles->cap); i++) {
        unsigned int handle = handles->cap[i];

        if (!handle)
            continue;

        dprintk("setting up handle 0x%.4x\n", handle);

        switch (handle) {
        case 0x0100:
        case 0x0101:
        case 0x0127:
            /* setup hotkeys */
            sony_call_snc_handle(handle, 0, &result);
            break;
        case 0x0102:
            /* setup hotkeys */
            sony_call_snc_handle(handle, 0x100, &result);
            break;
        case 0x0105:
        case 0x0148:
            /* touchpad enable/disable */
            result = sony_nc_touchpad_setup(pf_device, handle);
            if (result)
                pr_err("couldn't set up touchpad control function (%d)\n",
                        result);
            break;
        case 0x0115:
        case 0x0136:
        case 0x013f:
            result = sony_nc_battery_care_setup(pf_device, handle);
            if (result)
                pr_err("couldn't set up battery care function (%d)\n",
                        result);
            break;
        case 0x0119:
            result = sony_nc_lid_resume_setup(pf_device);
            if (result)
                pr_err("couldn't set up lid resume function (%d)\n",
                        result);
            break;
        case 0x0122:
            result = sony_nc_thermal_setup(pf_device);
            if (result)
                pr_err("couldn't set up thermal profile function (%d)\n",
                        result);
            break;
        case 0x0131:
            result = sony_nc_highspeed_charging_setup(pf_device);
            if (result)
                pr_err("couldn't set up high speed charging function (%d)\n",
                       result);
            break;
        case 0x0124:
        case 0x0135:
            result = sony_nc_rfkill_setup(device, handle);
            if (result)
                pr_err("couldn't set up rfkill support (%d)\n",
                        result);
            break;
        case 0x0137:
        case 0x0143:
            result = sony_nc_kbd_backlight_setup(pf_device, handle);
            if (result)
                pr_err("couldn't set up keyboard backlight function (%d)\n",
                        result);
            break;
        default:
            continue;
        }
    }

    /* Enable all events */
    arg = 0x10;
    if (!sony_nc_int_call(sony_nc_acpi_handle, "SN00", &arg, &bitmask))
        sony_nc_int_call(sony_nc_acpi_handle, "SN02", &bitmask,
                &result);
}

static void sony_nc_function_cleanup(struct platform_device *pd)
{
    unsigned int i, result, bitmask, handle;

    /* get enabled events and disable them */
    sony_nc_int_call(sony_nc_acpi_handle, "SN01", NULL, &bitmask);
    sony_nc_int_call(sony_nc_acpi_handle, "SN03", &bitmask, &result);

    /* cleanup handles here */
    for (i = 0; i < ARRAY_SIZE(handles->cap); i++) {

        handle = handles->cap[i];

        if (!handle)
            continue;

        switch (handle) {
        case 0x0105:
        case 0x0148:
            sony_nc_touchpad_cleanup(pd);
            break;
        case 0x0115:
        case 0x0136:
        case 0x013f:
            sony_nc_battery_care_cleanup(pd);
            break;
        case 0x0119:
            sony_nc_lid_resume_cleanup(pd);
            break;
        case 0x0122:
            sony_nc_thermal_cleanup(pd);
            break;
        case 0x0131:
            sony_nc_highspeed_charging_cleanup(pd);
            break;
        case 0x0124:
        case 0x0135:
            sony_nc_rfkill_cleanup();
            break;
        case 0x0137:
        case 0x0143:
            sony_nc_kbd_backlight_cleanup(pd);
            break;
        default:
            continue;
        }
    }

    /* finally cleanup the handles list */
    sony_nc_handles_cleanup(pd);
}

#ifdef CONFIG_PM_SLEEP
static void sony_nc_function_resume(void)
{
    unsigned int i, result, bitmask, arg;

    dprintk("Resuming SNC device\n");

    for (i = 0; i < ARRAY_SIZE(handles->cap); i++) {
        unsigned int handle = handles->cap[i];

        if (!handle)
            continue;

        switch (handle) {
        case 0x0100:
        case 0x0101:
        case 0x0127:
            /* re-enable hotkeys */
            sony_call_snc_handle(handle, 0, &result);
            break;
        case 0x0102:
            /* re-enable hotkeys */
            sony_call_snc_handle(handle, 0x100, &result);
            break;
        case 0x0122:
            sony_nc_thermal_resume();
            break;
        case 0x0124:
        case 0x0135:
            sony_nc_rfkill_update();
            break;
        case 0x0137:
        case 0x0143:
            sony_nc_kbd_backlight_resume();
            break;
        default:
            continue;
        }
    }

    /* Enable all events */
    arg = 0x10;
    if (!sony_nc_int_call(sony_nc_acpi_handle, "SN00", &arg, &bitmask))
        sony_nc_int_call(sony_nc_acpi_handle, "SN02", &bitmask,
                &result);
}

static int sony_nc_resume(struct device *dev)
{
    struct sony_nc_value *item;
    acpi_handle handle;

    for (item = sony_nc_values; item->name; item++) {
        int ret;

        if (!item->valid)
            continue;
        ret = sony_nc_int_call(sony_nc_acpi_handle, *item->acpiset,
                       &item->value, NULL);
        if (ret < 0) {
            pr_err("%s: %d\n", __func__, ret);
            break;
        }
    }

    if (ACPI_SUCCESS(acpi_get_handle(sony_nc_acpi_handle, "ECON",
                     &handle))) {
        int arg = 1;
        if (sony_nc_int_call(sony_nc_acpi_handle, "ECON", &arg, NULL))
            dprintk("ECON Method failed\n");
    }

    if (ACPI_SUCCESS(acpi_get_handle(sony_nc_acpi_handle, "SN00",
                     &handle)))
        sony_nc_function_resume();

    return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(sony_nc_pm, NULL, sony_nc_resume);

static void sony_nc_rfkill_cleanup(void)
{
    int i;

    for (i = 0; i < N_SONY_RFKILL; i++) {
        if (sony_rfkill_devices[i]) {
            rfkill_unregister(sony_rfkill_devices[i]);
            rfkill_destroy(sony_rfkill_devices[i]);
        }
    }
}

static int sony_nc_rfkill_set(void *data, bool blocked)
{
    int result;
    int argument = sony_rfkill_address[(long) data] + 0x100;

    if (!blocked)
        argument |= 0x030000;

    return sony_call_snc_handle(sony_rfkill_handle, argument, &result);
}

static const struct rfkill_ops sony_rfkill_ops = {
    .set_block = sony_nc_rfkill_set,
};

static int sony_nc_setup_rfkill(struct acpi_device *device,
                enum sony_nc_rfkill nc_type)
{
    int err = 0;
    struct rfkill *rfk;
    enum rfkill_type type;
    const char *name;
    int result;
    bool hwblock, swblock;

    switch (nc_type) {
    case SONY_WIFI:
        type = RFKILL_TYPE_WLAN;
        name = "sony-wifi";
        break;
    case SONY_BLUETOOTH:
        type = RFKILL_TYPE_BLUETOOTH;
        name = "sony-bluetooth";
        break;
    case SONY_WWAN:
        type = RFKILL_TYPE_WWAN;
        name = "sony-wwan";
        break;
    case SONY_WIMAX:
        type = RFKILL_TYPE_WIMAX;
        name = "sony-wimax";
        break;
    default:
        return -EINVAL;
    }

    rfk = rfkill_alloc(name, &device->dev, type,
               &sony_rfkill_ops, (void *)nc_type);
    if (!rfk)
        return -ENOMEM;

    if (sony_call_snc_handle(sony_rfkill_handle, 0x200, &result) < 0) {
        rfkill_destroy(rfk);
        return -1;
    }
    hwblock = !(result & 0x1);

    if (sony_call_snc_handle(sony_rfkill_handle,
                sony_rfkill_address[nc_type],
                &result) < 0) {
        rfkill_destroy(rfk);
        return -1;
    }
    swblock = !(result & 0x2);

    rfkill_init_sw_state(rfk, swblock);
    rfkill_set_hw_state(rfk, hwblock);

    err = rfkill_register(rfk);
    if (err) {
        rfkill_destroy(rfk);
        return err;
    }
    sony_rfkill_devices[nc_type] = rfk;
    return err;
}

static void sony_nc_rfkill_update(void)
{
    enum sony_nc_rfkill i;
    int result;
    bool hwblock;

    sony_call_snc_handle(sony_rfkill_handle, 0x200, &result);
    hwblock = !(result & 0x1);

    for (i = 0; i < N_SONY_RFKILL; i++) {
        int argument = sony_rfkill_address[i];

        if (!sony_rfkill_devices[i])
            continue;

        if (hwblock) {
            if (rfkill_set_hw_state(sony_rfkill_devices[i], true)) {
                /* we already know we're blocked */
            }
            continue;
        }

        sony_call_snc_handle(sony_rfkill_handle, argument, &result);
        rfkill_set_states(sony_rfkill_devices[i],
                  !(result & 0x2), false);
    }
}

static int sony_nc_rfkill_setup(struct acpi_device *device,
        unsigned int handle)
{
    u64 offset;
    int i;
    unsigned char buffer[32] = { 0 };

    offset = sony_find_snc_handle(handle);
    sony_rfkill_handle = handle;

    i = sony_nc_buffer_call(sony_nc_acpi_handle, "SN06", &offset, buffer,
            32);
    if (i < 0)
        return i;

    /* The buffer is filled with magic numbers describing the devices
     * available, 0xff terminates the enumeration.
     * Known codes:
     *  0x00 WLAN
     *  0x10 BLUETOOTH
     *  0x20 WWAN GPRS-EDGE
     *  0x21 WWAN HSDPA
     *  0x22 WWAN EV-DO
     *  0x23 WWAN GPS
     *  0x25 Gobi WWAN no GPS
     *  0x26 Gobi WWAN + GPS
     *  0x28 Gobi WWAN no GPS
     *  0x29 Gobi WWAN + GPS
     *  0x30 WIMAX
     *  0x50 Gobi WWAN no GPS
     *  0x51 Gobi WWAN + GPS
     *  0x70 no SIM card slot
     *  0x71 SIM card slot
     */
    for (i = 0; i < ARRAY_SIZE(buffer); i++) {

        if (buffer[i] == 0xff)
            break;

        dprintk("Radio devices, found 0x%.2x\n", buffer[i]);

        if (buffer[i] == 0 && !sony_rfkill_devices[SONY_WIFI])
            sony_nc_setup_rfkill(device, SONY_WIFI);

        if (buffer[i] == 0x10 && !sony_rfkill_devices[SONY_BLUETOOTH])
            sony_nc_setup_rfkill(device, SONY_BLUETOOTH);

        if (((0xf0 & buffer[i]) == 0x20 ||
                    (0xf0 & buffer[i]) == 0x50) &&
                !sony_rfkill_devices[SONY_WWAN])
            sony_nc_setup_rfkill(device, SONY_WWAN);

        if (buffer[i] == 0x30 && !sony_rfkill_devices[SONY_WIMAX])
            sony_nc_setup_rfkill(device, SONY_WIMAX);
    }
    return 0;
}

/* Keyboard backlight feature */
struct kbd_backlight {
    unsigned int handle;
    unsigned int base;
    unsigned int mode;
    unsigned int timeout;
    struct device_attribute mode_attr;
    struct device_attribute timeout_attr;
};

static struct kbd_backlight *kbdbl_ctl;

static ssize_t __sony_nc_kbd_backlight_mode_set(u8 value)
{
    int result;

    if (value > 1)
        return -EINVAL;

    if (sony_call_snc_handle(kbdbl_ctl->handle,
                (value << 0x10) | (kbdbl_ctl->base), &result))
        return -EIO;

    /* Try to turn the light on/off immediately */
    sony_call_snc_handle(kbdbl_ctl->handle,
            (value << 0x10) | (kbdbl_ctl->base + 0x100), &result);

    kbdbl_ctl->mode = value;

    return 0;
}

static ssize_t sony_nc_kbd_backlight_mode_store(struct device *dev,
        struct device_attribute *attr,
        const char *buffer, size_t count)
{
    int ret = 0;
    unsigned long value;

    if (count > 31)
        return -EINVAL;

    if (kstrtoul(buffer, 10, &value))
        return -EINVAL;

    ret = __sony_nc_kbd_backlight_mode_set(value);
    if (ret < 0)
        return ret;

    return count;
}

static ssize_t sony_nc_kbd_backlight_mode_show(struct device *dev,
        struct device_attribute *attr, char *buffer)
{
    ssize_t count = 0;
    count = snprintf(buffer, PAGE_SIZE, "%d\n", kbdbl_ctl->mode);
    return count;
}

static int __sony_nc_kbd_backlight_timeout_set(u8 value)
{
    int result;

    if (value > 3)
        return -EINVAL;

    if (sony_call_snc_handle(kbdbl_ctl->handle, (value << 0x10) |
                (kbdbl_ctl->base + 0x200), &result))
        return -EIO;

    kbdbl_ctl->timeout = value;

    return 0;
}

static ssize_t sony_nc_kbd_backlight_timeout_store(struct device *dev,
        struct device_attribute *attr,
        const char *buffer, size_t count)
{
    int ret = 0;
    unsigned long value;

    if (count > 31)
        return -EINVAL;

    if (kstrtoul(buffer, 10, &value))
        return -EINVAL;

    ret = __sony_nc_kbd_backlight_timeout_set(value);
    if (ret < 0)
        return ret;

    return count;
}

static ssize_t sony_nc_kbd_backlight_timeout_show(struct device *dev,
        struct device_attribute *attr, char *buffer)
{
    ssize_t count = 0;
    count = snprintf(buffer, PAGE_SIZE, "%d\n", kbdbl_ctl->timeout);
    return count;
}

static int sony_nc_kbd_backlight_setup(struct platform_device *pd,
        unsigned int handle)
{
    int result;
    int ret = 0;

    /* verify the kbd backlight presence, these handles are not used for
     * keyboard backlight only
     */
    ret = sony_call_snc_handle(handle, handle == 0x0137 ? 0x0B00 : 0x0100,
            &result);
    if (ret)
        return ret;

    if ((handle == 0x0137 && !(result & 0x02)) ||
            !(result & 0x01)) {
        dprintk("no backlight keyboard found\n");
        return 0;
    }

    kbdbl_ctl = kzalloc(sizeof(*kbdbl_ctl), GFP_KERNEL);
    if (!kbdbl_ctl)
        return -ENOMEM;

    kbdbl_ctl->handle = handle;
    if (handle == 0x0137)
        kbdbl_ctl->base = 0x0C00;
    else
        kbdbl_ctl->base = 0x4000;

    sysfs_attr_init(&kbdbl_ctl->mode_attr.attr);
    kbdbl_ctl->mode_attr.attr.name = "kbd_backlight";
    kbdbl_ctl->mode_attr.attr.mode = S_IRUGO | S_IWUSR;
    kbdbl_ctl->mode_attr.show = sony_nc_kbd_backlight_mode_show;
    kbdbl_ctl->mode_attr.store = sony_nc_kbd_backlight_mode_store;

    sysfs_attr_init(&kbdbl_ctl->timeout_attr.attr);
    kbdbl_ctl->timeout_attr.attr.name = "kbd_backlight_timeout";
    kbdbl_ctl->timeout_attr.attr.mode = S_IRUGO | S_IWUSR;
    kbdbl_ctl->timeout_attr.show = sony_nc_kbd_backlight_timeout_show;
    kbdbl_ctl->timeout_attr.store = sony_nc_kbd_backlight_timeout_store;

    ret = device_create_file(&pd->dev, &kbdbl_ctl->mode_attr);
    if (ret)
        goto outkzalloc;

    ret = device_create_file(&pd->dev, &kbdbl_ctl->timeout_attr);
    if (ret)
        goto outmode;

    __sony_nc_kbd_backlight_mode_set(kbd_backlight);
    __sony_nc_kbd_backlight_timeout_set(kbd_backlight_timeout);

    return 0;

outmode:
    device_remove_file(&pd->dev, &kbdbl_ctl->mode_attr);
outkzalloc:
    kfree(kbdbl_ctl);
    kbdbl_ctl = NULL;
    return ret;
}

static void sony_nc_kbd_backlight_cleanup(struct platform_device *pd)
{
    if (kbdbl_ctl) {
        int result;

        device_remove_file(&pd->dev, &kbdbl_ctl->mode_attr);
        device_remove_file(&pd->dev, &kbdbl_ctl->timeout_attr);

        /* restore the default hw behaviour */
        sony_call_snc_handle(kbdbl_ctl->handle,
                kbdbl_ctl->base | 0x10000, &result);
        sony_call_snc_handle(kbdbl_ctl->handle,
                kbdbl_ctl->base + 0x200, &result);

        kfree(kbdbl_ctl);
        kbdbl_ctl = NULL;
    }
}

#ifdef CONFIG_PM_SLEEP
static void sony_nc_kbd_backlight_resume(void)
{
    int ignore = 0;

    if (!kbdbl_ctl)
        return;

    if (kbdbl_ctl->mode == 0)
        sony_call_snc_handle(kbdbl_ctl->handle, kbdbl_ctl->base,
                &ignore);

    if (kbdbl_ctl->timeout != 0)
        sony_call_snc_handle(kbdbl_ctl->handle,
                (kbdbl_ctl->base + 0x200) |
                (kbdbl_ctl->timeout << 0x10), &ignore);
}
#endif

struct battery_care_control {
    struct device_attribute attrs[2];
    unsigned int handle;
};
static struct battery_care_control *bcare_ctl;

static ssize_t sony_nc_battery_care_limit_store(struct device *dev,
        struct device_attribute *attr,
        const char *buffer, size_t count)
{
    unsigned int result, cmd;
    unsigned long value;

    if (count > 31)
        return -EINVAL;

    if (kstrtoul(buffer, 10, &value))
        return -EINVAL;

    /*  limit values (2 bits):
     *  00 - none
     *  01 - 80%
     *  10 - 50%
     *  11 - 100%
     *
     *  bit 0: 0 disable BCL, 1 enable BCL
     *  bit 1: 1 tell to store the battery limit (see bits 6,7) too
     *  bits 2,3: reserved
     *  bits 4,5: store the limit into the EC
     *  bits 6,7: store the limit into the battery
     */
    cmd = 0;

    if (value > 0) {
        if (value <= 50)
            cmd = 0x20;

        else if (value <= 80)
            cmd = 0x10;

        else if (value <= 100)
            cmd = 0x30;

        else
            return -EINVAL;

        /*
         * handle 0x0115 should allow storing on battery too;
         * handle 0x0136 same as 0x0115 + health status;
         * handle 0x013f, same as 0x0136 but no storing on the battery
         */
        if (bcare_ctl->handle != 0x013f)
            cmd = cmd | (cmd << 2);

        cmd = (cmd | 0x1) << 0x10;
    }

    if (sony_call_snc_handle(bcare_ctl->handle, cmd | 0x0100, &result))
        return -EIO;

    return count;
}

static ssize_t sony_nc_battery_care_limit_show(struct device *dev,
        struct device_attribute *attr, char *buffer)
{
    unsigned int result, status;

    if (sony_call_snc_handle(bcare_ctl->handle, 0x0000, &result))
        return -EIO;

    status = (result & 0x01) ? ((result & 0x30) >> 0x04) : 0;
    switch (status) {
    case 1:
        status = 80;
        break;
    case 2:
        status = 50;
        break;
    case 3:
        status = 100;
        break;
    default:
        status = 0;
        break;
    }

    return snprintf(buffer, PAGE_SIZE, "%d\n", status);
}

static ssize_t sony_nc_battery_care_health_show(struct device *dev,
        struct device_attribute *attr, char *buffer)
{
    ssize_t count = 0;
    unsigned int health;

    if (sony_call_snc_handle(bcare_ctl->handle, 0x0200, &health))
        return -EIO;

    count = snprintf(buffer, PAGE_SIZE, "%d\n", health & 0xff);

    return count;
}

static int sony_nc_battery_care_setup(struct platform_device *pd,
        unsigned int handle)
{
    int ret = 0;

    bcare_ctl = kzalloc(sizeof(struct battery_care_control), GFP_KERNEL);
    if (!bcare_ctl)
        return -ENOMEM;

    bcare_ctl->handle = handle;

    sysfs_attr_init(&bcare_ctl->attrs[0].attr);
    bcare_ctl->attrs[0].attr.name = "battery_care_limiter";
    bcare_ctl->attrs[0].attr.mode = S_IRUGO | S_IWUSR;
    bcare_ctl->attrs[0].show = sony_nc_battery_care_limit_show;
    bcare_ctl->attrs[0].store = sony_nc_battery_care_limit_store;

    ret = device_create_file(&pd->dev, &bcare_ctl->attrs[0]);
    if (ret)
        goto outkzalloc;

    /* 0x0115 is for models with no health reporting capability */
    if (handle == 0x0115)
        return 0;

    sysfs_attr_init(&bcare_ctl->attrs[1].attr);
    bcare_ctl->attrs[1].attr.name = "battery_care_health";
    bcare_ctl->attrs[1].attr.mode = S_IRUGO;
    bcare_ctl->attrs[1].show = sony_nc_battery_care_health_show;

    ret = device_create_file(&pd->dev, &bcare_ctl->attrs[1]);
    if (ret)
        goto outlimiter;

    return 0;

outlimiter:
    device_remove_file(&pd->dev, &bcare_ctl->attrs[0]);

outkzalloc:
    kfree(bcare_ctl);
    bcare_ctl = NULL;

    return ret;
}

static void sony_nc_battery_care_cleanup(struct platform_device *pd)
{
    if (bcare_ctl) {
        device_remove_file(&pd->dev, &bcare_ctl->attrs[0]);
        if (bcare_ctl->handle != 0x0115)
            device_remove_file(&pd->dev, &bcare_ctl->attrs[1]);

        kfree(bcare_ctl);
        bcare_ctl = NULL;
    }
}

struct snc_thermal_ctrl {
    unsigned int mode;
    unsigned int profiles;
    struct device_attribute mode_attr;
    struct device_attribute profiles_attr;
};
static struct snc_thermal_ctrl *th_handle;

#define THM_PROFILE_MAX 3
static const char * const snc_thermal_profiles[] = {
    "balanced",
    "silent",
    "performance"
};

static int sony_nc_thermal_mode_set(unsigned short mode)
{
    unsigned int result;

    /* the thermal profile seems to be a two bit bitmask:
     * lsb -> silent
     * msb -> performance
     * no bit set is the normal operation and is always valid
     * Some vaio models only have "balanced" and "performance"
     */
    if ((mode && !(th_handle->profiles & mode)) || mode >= THM_PROFILE_MAX)
        return -EINVAL;

    if (sony_call_snc_handle(0x0122, mode << 0x10 | 0x0200, &result))
        return -EIO;

    th_handle->mode = mode;

    return 0;
}

static int sony_nc_thermal_mode_get(void)
{
    unsigned int result;

    if (sony_call_snc_handle(0x0122, 0x0100, &result))
        return -EIO;

    return result & 0xff;
}

static ssize_t sony_nc_thermal_profiles_show(struct device *dev,
        struct device_attribute *attr, char *buffer)
{
    short cnt;
    size_t idx = 0;

    for (cnt = 0; cnt < THM_PROFILE_MAX; cnt++) {
        if (!cnt || (th_handle->profiles & cnt))
            idx += snprintf(buffer + idx, PAGE_SIZE - idx, "%s ",
                    snc_thermal_profiles[cnt]);
    }
    idx += snprintf(buffer + idx, PAGE_SIZE - idx, "\n");

    return idx;
}

static ssize_t sony_nc_thermal_mode_store(struct device *dev,
        struct device_attribute *attr,
        const char *buffer, size_t count)
{
    unsigned short cmd;
    size_t len = count;

    if (count == 0)
        return -EINVAL;

    /* skip the newline if present */
    if (buffer[len - 1] == '\n')
        len--;

    for (cmd = 0; cmd < THM_PROFILE_MAX; cmd++)
        if (strncmp(buffer, snc_thermal_profiles[cmd], len) == 0)
            break;

    if (sony_nc_thermal_mode_set(cmd))
        return -EIO;

    return count;
}

static ssize_t sony_nc_thermal_mode_show(struct device *dev,
        struct device_attribute *attr, char *buffer)
{
    ssize_t count = 0;
    int mode = sony_nc_thermal_mode_get();

    if (mode < 0)
        return mode;

    count = snprintf(buffer, PAGE_SIZE, "%s\n", snc_thermal_profiles[mode]);

    return count;
}

static int sony_nc_thermal_setup(struct platform_device *pd)
{
    int ret = 0;
    th_handle = kzalloc(sizeof(struct snc_thermal_ctrl), GFP_KERNEL);
    if (!th_handle)
        return -ENOMEM;

    ret = sony_call_snc_handle(0x0122, 0x0000, &th_handle->profiles);
    if (ret) {
        pr_warn("couldn't to read the thermal profiles\n");
        goto outkzalloc;
    }

    ret = sony_nc_thermal_mode_get();
    if (ret < 0) {
        pr_warn("couldn't to read the current thermal profile");
        goto outkzalloc;
    }
    th_handle->mode = ret;

    sysfs_attr_init(&th_handle->profiles_attr.attr);
    th_handle->profiles_attr.attr.name = "thermal_profiles";
    th_handle->profiles_attr.attr.mode = S_IRUGO;
    th_handle->profiles_attr.show = sony_nc_thermal_profiles_show;

    sysfs_attr_init(&th_handle->mode_attr.attr);
    th_handle->mode_attr.attr.name = "thermal_control";
    th_handle->mode_attr.attr.mode = S_IRUGO | S_IWUSR;
    th_handle->mode_attr.show = sony_nc_thermal_mode_show;
    th_handle->mode_attr.store = sony_nc_thermal_mode_store;

    ret = device_create_file(&pd->dev, &th_handle->profiles_attr);
    if (ret)
        goto outkzalloc;

    ret = device_create_file(&pd->dev, &th_handle->mode_attr);
    if (ret)
        goto outprofiles;

    return 0;

outprofiles:
    device_remove_file(&pd->dev, &th_handle->profiles_attr);
outkzalloc:
    kfree(th_handle);
    th_handle = NULL;
    return ret;
}

static void sony_nc_thermal_cleanup(struct platform_device *pd)
{
    if (th_handle) {
        device_remove_file(&pd->dev, &th_handle->profiles_attr);
        device_remove_file(&pd->dev, &th_handle->mode_attr);
        kfree(th_handle);
        th_handle = NULL;
    }
}

#ifdef CONFIG_PM_SLEEP
static void sony_nc_thermal_resume(void)
{
    unsigned int status = sony_nc_thermal_mode_get();

    if (status != th_handle->mode)
        sony_nc_thermal_mode_set(th_handle->mode);
}
#endif

/* resume on LID open */
struct snc_lid_resume_control {
    struct device_attribute attrs[3];
    unsigned int status;
};
static struct snc_lid_resume_control *lid_ctl;

static ssize_t sony_nc_lid_resume_store(struct device *dev,
                    struct device_attribute *attr,
                    const char *buffer, size_t count)
{
    unsigned int result, pos;
    unsigned long value;
    if (count > 31)
        return -EINVAL;

    if (kstrtoul(buffer, 10, &value) || value > 1)
        return -EINVAL;

    /* the value we have to write to SNC is a bitmask:
     * +--------------+
     * | S3 | S4 | S5 |
     * +--------------+
     *   2    1    0
     */
    if (strcmp(attr->attr.name, "lid_resume_S3") == 0)
        pos = 2;
    else if (strcmp(attr->attr.name, "lid_resume_S4") == 0)
        pos = 1;
    else if (strcmp(attr->attr.name, "lid_resume_S5") == 0)
        pos = 0;
    else
               return -EINVAL;

    if (value)
        value = lid_ctl->status | (1 << pos);
    else
        value = lid_ctl->status & ~(1 << pos);

    if (sony_call_snc_handle(0x0119, value << 0x10 | 0x0100, &result))
        return -EIO;

    lid_ctl->status = value;

    return count;
}

static ssize_t sony_nc_lid_resume_show(struct device *dev,
                       struct device_attribute *attr, char *buffer)
{
    unsigned int pos;

    if (strcmp(attr->attr.name, "lid_resume_S3") == 0)
        pos = 2;
    else if (strcmp(attr->attr.name, "lid_resume_S4") == 0)
        pos = 1;
    else if (strcmp(attr->attr.name, "lid_resume_S5") == 0)
        pos = 0;
    else
        return -EINVAL;
           
    return snprintf(buffer, PAGE_SIZE, "%d\n",
            (lid_ctl->status >> pos) & 0x01);
}

static int sony_nc_lid_resume_setup(struct platform_device *pd)
{
    unsigned int result;
    int i;

    if (sony_call_snc_handle(0x0119, 0x0000, &result))
        return -EIO;

    lid_ctl = kzalloc(sizeof(struct snc_lid_resume_control), GFP_KERNEL);
    if (!lid_ctl)
        return -ENOMEM;

    lid_ctl->status = result & 0x7;

    sysfs_attr_init(&lid_ctl->attrs[0].attr);
    lid_ctl->attrs[0].attr.name = "lid_resume_S3";
    lid_ctl->attrs[0].attr.mode = S_IRUGO | S_IWUSR;
    lid_ctl->attrs[0].show = sony_nc_lid_resume_show;
    lid_ctl->attrs[0].store = sony_nc_lid_resume_store;

    sysfs_attr_init(&lid_ctl->attrs[1].attr);
    lid_ctl->attrs[1].attr.name = "lid_resume_S4";
    lid_ctl->attrs[1].attr.mode = S_IRUGO | S_IWUSR;
    lid_ctl->attrs[1].show = sony_nc_lid_resume_show;
    lid_ctl->attrs[1].store = sony_nc_lid_resume_store;

    sysfs_attr_init(&lid_ctl->attrs[2].attr);
    lid_ctl->attrs[2].attr.name = "lid_resume_S5";
    lid_ctl->attrs[2].attr.mode = S_IRUGO | S_IWUSR;
    lid_ctl->attrs[2].show = sony_nc_lid_resume_show;
    lid_ctl->attrs[2].store = sony_nc_lid_resume_store;

    for (i = 0; i < 3; i++) {
        result = device_create_file(&pd->dev, &lid_ctl->attrs[i]);
        if (result)
            goto liderror;
    }

    return 0;

liderror:
    for (; i > 0; i--)
        device_remove_file(&pd->dev, &lid_ctl->attrs[i]);

    kfree(lid_ctl);
    lid_ctl = NULL;

    return result;
}

static void sony_nc_lid_resume_cleanup(struct platform_device *pd)
{
    int i;

    if (lid_ctl) {
        for (i = 0; i < 3; i++)
            device_remove_file(&pd->dev, &lid_ctl->attrs[i]);

        kfree(lid_ctl);
        lid_ctl = NULL;
    }
}

/* High speed charging function */
static struct device_attribute *hsc_handle;

static ssize_t sony_nc_highspeed_charging_store(struct device *dev,
        struct device_attribute *attr,
        const char *buffer, size_t count)
{
    unsigned int result;
    unsigned long value;

    if (count > 31)
        return -EINVAL;

    if (kstrtoul(buffer, 10, &value) || value > 1)
        return -EINVAL;

    if (sony_call_snc_handle(0x0131, value << 0x10 | 0x0200, &result))
        return -EIO;

    return count;
}

static ssize_t sony_nc_highspeed_charging_show(struct device *dev,
        struct device_attribute *attr, char *buffer)
{
    unsigned int result;

    if (sony_call_snc_handle(0x0131, 0x0100, &result))
        return -EIO;

    return snprintf(buffer, PAGE_SIZE, "%d\n", result & 0x01);
}

static int sony_nc_highspeed_charging_setup(struct platform_device *pd)
{
    unsigned int result;

    if (sony_call_snc_handle(0x0131, 0x0000, &result) || !(result & 0x01)) {
        /* some models advertise the handle but have no implementation
         * for it
         */
        pr_info("No High Speed Charging capability found\n");
        return 0;
    }

    hsc_handle = kzalloc(sizeof(struct device_attribute), GFP_KERNEL);
    if (!hsc_handle)
        return -ENOMEM;

    sysfs_attr_init(&hsc_handle->attr);
    hsc_handle->attr.name = "battery_highspeed_charging";
    hsc_handle->attr.mode = S_IRUGO | S_IWUSR;
    hsc_handle->show = sony_nc_highspeed_charging_show;
    hsc_handle->store = sony_nc_highspeed_charging_store;

    result = device_create_file(&pd->dev, hsc_handle);
    if (result) {
        kfree(hsc_handle);
        hsc_handle = NULL;
        return result;
    }

    return 0;
}

static void sony_nc_highspeed_charging_cleanup(struct platform_device *pd)
{
    if (hsc_handle) {
        device_remove_file(&pd->dev, hsc_handle);
        kfree(hsc_handle);
        hsc_handle = NULL;
    }
}

/* Touchpad enable/disable */
struct touchpad_control {
    struct device_attribute attr;
    int handle;
};
static struct touchpad_control *tp_ctl;

static ssize_t sony_nc_touchpad_store(struct device *dev,
        struct device_attribute *attr, const char *buffer, size_t count)
{
    unsigned int result;
    unsigned long value;

    if (count > 31)
        return -EINVAL;

    if (kstrtoul(buffer, 10, &value) || value > 1)
        return -EINVAL;

    /* sysfs: 0 disabled, 1 enabled
     * EC: 0 enabled, 1 disabled
     */
    if (sony_call_snc_handle(tp_ctl->handle,
                (!value << 0x10) | 0x100, &result))
        return -EIO;

    return count;
}

static ssize_t sony_nc_touchpad_show(struct device *dev,
        struct device_attribute *attr, char *buffer)
{
    unsigned int result;

    if (sony_call_snc_handle(tp_ctl->handle, 0x000, &result))
        return -EINVAL;

    return snprintf(buffer, PAGE_SIZE, "%d\n", !(result & 0x01));
}

static int sony_nc_touchpad_setup(struct platform_device *pd,
        unsigned int handle)
{
    int ret = 0;

    tp_ctl = kzalloc(sizeof(struct touchpad_control), GFP_KERNEL);
    if (!tp_ctl)
        return -ENOMEM;

    tp_ctl->handle = handle;

    sysfs_attr_init(&tp_ctl->attr.attr);
    tp_ctl->attr.attr.name = "touchpad";
    tp_ctl->attr.attr.mode = S_IRUGO | S_IWUSR;
    tp_ctl->attr.show = sony_nc_touchpad_show;
    tp_ctl->attr.store = sony_nc_touchpad_store;

    ret = device_create_file(&pd->dev, &tp_ctl->attr);
    if (ret) {
        kfree(tp_ctl);
        tp_ctl = NULL;
    }

    return ret;
}

static void sony_nc_touchpad_cleanup(struct platform_device *pd)
{
    if (tp_ctl) {
        device_remove_file(&pd->dev, &tp_ctl->attr);
        kfree(tp_ctl);
        tp_ctl = NULL;
    }
}

static void sony_nc_backlight_ng_read_limits(int handle,
        struct sony_backlight_props *props)
{
    u64 offset;
    int i;
    int lvl_table_len = 0;
    u8 min = 0xff, max = 0x00;
    unsigned char buffer[32] = { 0 };

    props->handle = handle;
    props->offset = 0;
    props->maxlvl = 0xff;

    offset = sony_find_snc_handle(handle);

    /* try to read the boundaries from ACPI tables, if we fail the above
     * defaults should be reasonable
     */
    i = sony_nc_buffer_call(sony_nc_acpi_handle, "SN06", &offset, buffer,
            32);
    if (i < 0)
        return;

    switch (handle) {
    case 0x012f:
    case 0x0137:
        lvl_table_len = 9;
        break;
    case 0x143:
        lvl_table_len = 16;
        break;
    }

    /* the buffer lists brightness levels available, brightness levels are
     * from position 0 to 8 in the array, other values are used by ALS
     * control.
     */
    for (i = 0; i < lvl_table_len && i < ARRAY_SIZE(buffer); i++) {

        dprintk("Brightness level: %d\n", buffer[i]);

        if (!buffer[i])
            break;

        if (buffer[i] > max)
            max = buffer[i];
        if (buffer[i] < min)
            min = buffer[i];
    }
    props->offset = min;
    props->maxlvl = max;
    dprintk("Brightness levels: min=%d max=%d\n", props->offset,
            props->maxlvl);
}

static void sony_nc_backlight_setup(void)
{
    acpi_handle unused;
    int max_brightness = 0;
    const struct backlight_ops *ops = NULL;
    struct backlight_properties props;

    if (sony_find_snc_handle(0x12f) >= 0) {
        ops = &sony_backlight_ng_ops;
        sony_bl_props.cmd_base = 0x0100;
        sony_nc_backlight_ng_read_limits(0x12f, &sony_bl_props);
        max_brightness = sony_bl_props.maxlvl - sony_bl_props.offset;

    } else if (sony_find_snc_handle(0x137) >= 0) {
        ops = &sony_backlight_ng_ops;
        sony_bl_props.cmd_base = 0x0100;
        sony_nc_backlight_ng_read_limits(0x137, &sony_bl_props);
        max_brightness = sony_bl_props.maxlvl - sony_bl_props.offset;

    } else if (sony_find_snc_handle(0x143) >= 0) {
        ops = &sony_backlight_ng_ops;
        sony_bl_props.cmd_base = 0x3000;
        sony_nc_backlight_ng_read_limits(0x143, &sony_bl_props);
        max_brightness = sony_bl_props.maxlvl - sony_bl_props.offset;

    } else if (ACPI_SUCCESS(acpi_get_handle(sony_nc_acpi_handle, "GBRT",
                        &unused))) {
        ops = &sony_backlight_ops;
        max_brightness = SONY_MAX_BRIGHTNESS - 1;

    } else
        return;

    memset(&props, 0, sizeof(struct backlight_properties));
    props.type = BACKLIGHT_PLATFORM;
    props.max_brightness = max_brightness;
    sony_bl_props.dev = backlight_device_register("sony", NULL,
                              &sony_bl_props,
                              ops, &props);

    if (IS_ERR(sony_bl_props.dev)) {
        pr_warn("unable to register backlight device\n");
        sony_bl_props.dev = NULL;
    } else
        sony_bl_props.dev->props.brightness =
            ops->get_brightness(sony_bl_props.dev);
}

static void sony_nc_backlight_cleanup(void)
{
    if (sony_bl_props.dev)
        backlight_device_unregister(sony_bl_props.dev);
}

static int sony_nc_add(struct acpi_device *device)
{
    acpi_status status;
    int result = 0;
    acpi_handle handle;
    struct sony_nc_value *item;

    pr_info("%s v%s\n", SONY_NC_DRIVER_NAME, SONY_LAPTOP_DRIVER_VERSION);

    sony_nc_acpi_device = device;
    strcpy(acpi_device_class(device), "sony/hotkey");

    sony_nc_acpi_handle = device->handle;

    /* read device status */
    result = acpi_bus_get_status(device);
    /* bail IFF the above call was successful and the device is not present */
    if (!result && !device->status.present) {
        dprintk("Device not present\n");
        result = -ENODEV;
        goto outwalk;
    }

    result = sony_pf_add();
    if (result)
        goto outpresent;

    if (debug) {
        status = acpi_walk_namespace(ACPI_TYPE_METHOD,
                sony_nc_acpi_handle, 1, sony_walk_callback,
                NULL, NULL, NULL);
        if (ACPI_FAILURE(status)) {
            pr_warn("unable to walk acpi resources\n");
            result = -ENODEV;
            goto outpresent;
        }
    }

    result = sony_laptop_setup_input(device);
    if (result) {
        pr_err("Unable to create input devices\n");
        goto outplatform;
    }

    if (ACPI_SUCCESS(acpi_get_handle(sony_nc_acpi_handle, "ECON",
                     &handle))) {
        int arg = 1;
        if (sony_nc_int_call(sony_nc_acpi_handle, "ECON", &arg, NULL))
            dprintk("ECON Method failed\n");
    }

    if (ACPI_SUCCESS(acpi_get_handle(sony_nc_acpi_handle, "SN00",
                     &handle))) {
        dprintk("Doing SNC setup\n");
        /* retrieve the available handles */
        result = sony_nc_handles_setup(sony_pf_device);
        if (!result)
            sony_nc_function_setup(device, sony_pf_device);
    }

    /* setup input devices and helper fifo */
    if (acpi_video_backlight_support()) {
        pr_info("brightness ignored, must be controlled by ACPI video driver\n");
    } else {
        sony_nc_backlight_setup();
    }

    /* create sony_pf sysfs attributes related to the SNC device */
    for (item = sony_nc_values; item->name; ++item) {

        if (!debug && item->debug)
            continue;

        /* find the available acpiget as described in the DSDT */
        for (; item->acpiget && *item->acpiget; ++item->acpiget) {
            if (ACPI_SUCCESS(acpi_get_handle(sony_nc_acpi_handle,
                             *item->acpiget,
                             &handle))) {
                dprintk("Found %s getter: %s\n",
                        item->name, *item->acpiget);
                item->devattr.attr.mode |= S_IRUGO;
                break;
            }
        }

        /* find the available acpiset as described in the DSDT */
        for (; item->acpiset && *item->acpiset; ++item->acpiset) {
            if (ACPI_SUCCESS(acpi_get_handle(sony_nc_acpi_handle,
                             *item->acpiset,
                             &handle))) {
                dprintk("Found %s setter: %s\n",
                        item->name, *item->acpiset);
                item->devattr.attr.mode |= S_IWUSR;
                break;
            }
        }

        if (item->devattr.attr.mode != 0) {
            result =
                device_create_file(&sony_pf_device->dev,
                           &item->devattr);
            if (result)
                goto out_sysfs;
        }
    }

    return 0;

out_sysfs:
    for (item = sony_nc_values; item->name; ++item) {
        device_remove_file(&sony_pf_device->dev, &item->devattr);
    }
    sony_nc_backlight_cleanup();
    sony_nc_function_cleanup(sony_pf_device);
    sony_nc_handles_cleanup(sony_pf_device);

outplatform:
    sony_laptop_remove_input();

outpresent:
    sony_pf_remove();

outwalk:
    sony_nc_rfkill_cleanup();
    return result;
}

static int sony_nc_remove(struct acpi_device *device, int type)
{
    struct sony_nc_value *item;

    sony_nc_backlight_cleanup();

    sony_nc_acpi_device = NULL;

    for (item = sony_nc_values; item->name; ++item) {
        device_remove_file(&sony_pf_device->dev, &item->devattr);
    }

    sony_nc_function_cleanup(sony_pf_device);
    sony_nc_handles_cleanup(sony_pf_device);
    sony_pf_remove();
    sony_laptop_remove_input();
    dprintk(SONY_NC_DRIVER_NAME " removed.\n");

    return 0;
}

static const struct acpi_device_id sony_device_ids[] = {
    {SONY_NC_HID, 0},
    {SONY_PIC_HID, 0},
    {"", 0},
};
MODULE_DEVICE_TABLE(acpi, sony_device_ids);

static const struct acpi_device_id sony_nc_device_ids[] = {
    {SONY_NC_HID, 0},
    {"", 0},
};

static struct acpi_driver sony_nc_driver = {
    .name = SONY_NC_DRIVER_NAME,
    .class = SONY_NC_CLASS,
    .ids = sony_nc_device_ids,
    .owner = THIS_MODULE,
    .ops = {
        .add = sony_nc_add,
        .remove = sony_nc_remove,
        .notify = sony_nc_notify,
        },
    .drv.pm = &sony_nc_pm,
};

/*********** SPIC (SNY6001) Device ***********/

#define SONYPI_DEVICE_TYPE1 0x00000001
#define SONYPI_DEVICE_TYPE2 0x00000002
#define SONYPI_DEVICE_TYPE3 0x00000004

#define SONYPI_TYPE1_OFFSET 0x04
#define SONYPI_TYPE2_OFFSET 0x12
#define SONYPI_TYPE3_OFFSET 0x12

struct sony_pic_ioport {
    struct acpi_resource_io io1;
    struct acpi_resource_io io2;
    struct list_head    list;
};

struct sony_pic_irq {
    struct acpi_resource_irq    irq;
    struct list_head        list;
};

struct sonypi_eventtypes {
    u8          data;
    unsigned long       mask;
    struct sonypi_event *events;
};

struct sony_pic_dev {
    struct acpi_device      *acpi_dev;
    struct sony_pic_irq     *cur_irq;
    struct sony_pic_ioport      *cur_ioport;
    struct list_head        interrupts;
    struct list_head        ioports;
    struct mutex            lock;
    struct sonypi_eventtypes    *event_types;
    int                             (*handle_irq)(const u8, const u8);
    int             model;
    u16             evport_offset;
    u8              camera_power;
    u8              bluetooth_power;
    u8              wwan_power;
};

static struct sony_pic_dev spic_dev = {
    .interrupts = LIST_HEAD_INIT(spic_dev.interrupts),
    .ioports    = LIST_HEAD_INIT(spic_dev.ioports),
};

static int spic_drv_registered;

/* Event masks */
#define SONYPI_JOGGER_MASK          0x00000001
#define SONYPI_CAPTURE_MASK         0x00000002
#define SONYPI_FNKEY_MASK           0x00000004
#define SONYPI_BLUETOOTH_MASK           0x00000008
#define SONYPI_PKEY_MASK            0x00000010
#define SONYPI_BACK_MASK            0x00000020
#define SONYPI_HELP_MASK            0x00000040
#define SONYPI_LID_MASK             0x00000080
#define SONYPI_ZOOM_MASK            0x00000100
#define SONYPI_THUMBPHRASE_MASK         0x00000200
#define SONYPI_MEYE_MASK            0x00000400
#define SONYPI_MEMORYSTICK_MASK         0x00000800
#define SONYPI_BATTERY_MASK         0x00001000
#define SONYPI_WIRELESS_MASK            0x00002000

struct sonypi_event {
    u8  data;
    u8  event;
};

/* The set of possible button release events */
static struct sonypi_event sonypi_releaseev[] = {
    { 0x00, SONYPI_EVENT_ANYBUTTON_RELEASED },
    { 0, 0 }
};

/* The set of possible jogger events  */
static struct sonypi_event sonypi_joggerev[] = {
    { 0x1f, SONYPI_EVENT_JOGDIAL_UP },
    { 0x01, SONYPI_EVENT_JOGDIAL_DOWN },
    { 0x5f, SONYPI_EVENT_JOGDIAL_UP_PRESSED },
    { 0x41, SONYPI_EVENT_JOGDIAL_DOWN_PRESSED },
    { 0x1e, SONYPI_EVENT_JOGDIAL_FAST_UP },
    { 0x02, SONYPI_EVENT_JOGDIAL_FAST_DOWN },
    { 0x5e, SONYPI_EVENT_JOGDIAL_FAST_UP_PRESSED },
    { 0x42, SONYPI_EVENT_JOGDIAL_FAST_DOWN_PRESSED },
    { 0x1d, SONYPI_EVENT_JOGDIAL_VFAST_UP },
    { 0x03, SONYPI_EVENT_JOGDIAL_VFAST_DOWN },
    { 0x5d, SONYPI_EVENT_JOGDIAL_VFAST_UP_PRESSED },
    { 0x43, SONYPI_EVENT_JOGDIAL_VFAST_DOWN_PRESSED },
    { 0x40, SONYPI_EVENT_JOGDIAL_PRESSED },
    { 0, 0 }
};

/* The set of possible capture button events */
static struct sonypi_event sonypi_captureev[] = {
    { 0x05, SONYPI_EVENT_CAPTURE_PARTIALPRESSED },
    { 0x07, SONYPI_EVENT_CAPTURE_PRESSED },
    { 0x40, SONYPI_EVENT_CAPTURE_PRESSED },
    { 0x01, SONYPI_EVENT_CAPTURE_PARTIALRELEASED },
    { 0, 0 }
};

/* The set of possible fnkeys events */
static struct sonypi_event sonypi_fnkeyev[] = {
    { 0x10, SONYPI_EVENT_FNKEY_ESC },
    { 0x11, SONYPI_EVENT_FNKEY_F1 },
    { 0x12, SONYPI_EVENT_FNKEY_F2 },
    { 0x13, SONYPI_EVENT_FNKEY_F3 },
    { 0x14, SONYPI_EVENT_FNKEY_F4 },
    { 0x15, SONYPI_EVENT_FNKEY_F5 },
    { 0x16, SONYPI_EVENT_FNKEY_F6 },
    { 0x17, SONYPI_EVENT_FNKEY_F7 },
    { 0x18, SONYPI_EVENT_FNKEY_F8 },
    { 0x19, SONYPI_EVENT_FNKEY_F9 },
    { 0x1a, SONYPI_EVENT_FNKEY_F10 },
    { 0x1b, SONYPI_EVENT_FNKEY_F11 },
    { 0x1c, SONYPI_EVENT_FNKEY_F12 },
    { 0x1f, SONYPI_EVENT_FNKEY_RELEASED },
    { 0x21, SONYPI_EVENT_FNKEY_1 },
    { 0x22, SONYPI_EVENT_FNKEY_2 },
    { 0x31, SONYPI_EVENT_FNKEY_D },
    { 0x32, SONYPI_EVENT_FNKEY_E },
    { 0x33, SONYPI_EVENT_FNKEY_F },
    { 0x34, SONYPI_EVENT_FNKEY_S },
    { 0x35, SONYPI_EVENT_FNKEY_B },
    { 0x36, SONYPI_EVENT_FNKEY_ONLY },
    { 0, 0 }
};

/* The set of possible program key events */
static struct sonypi_event sonypi_pkeyev[] = {
    { 0x01, SONYPI_EVENT_PKEY_P1 },
    { 0x02, SONYPI_EVENT_PKEY_P2 },
    { 0x04, SONYPI_EVENT_PKEY_P3 },
    { 0x20, SONYPI_EVENT_PKEY_P1 },
    { 0, 0 }
};

/* The set of possible bluetooth events */
static struct sonypi_event sonypi_blueev[] = {
    { 0x55, SONYPI_EVENT_BLUETOOTH_PRESSED },
    { 0x59, SONYPI_EVENT_BLUETOOTH_ON },
    { 0x5a, SONYPI_EVENT_BLUETOOTH_OFF },
    { 0, 0 }
};

/* The set of possible wireless events */
static struct sonypi_event sonypi_wlessev[] = {
    { 0x59, SONYPI_EVENT_IGNORE },
    { 0x5a, SONYPI_EVENT_IGNORE },
    { 0, 0 }
};

/* The set of possible back button events */
static struct sonypi_event sonypi_backev[] = {
    { 0x20, SONYPI_EVENT_BACK_PRESSED },
    { 0, 0 }
};

/* The set of possible help button events */
static struct sonypi_event sonypi_helpev[] = {
    { 0x3b, SONYPI_EVENT_HELP_PRESSED },
    { 0, 0 }
};


/* The set of possible lid events */
static struct sonypi_event sonypi_lidev[] = {
    { 0x51, SONYPI_EVENT_LID_CLOSED },
    { 0x50, SONYPI_EVENT_LID_OPENED },
    { 0, 0 }
};

/* The set of possible zoom events */
static struct sonypi_event sonypi_zoomev[] = {
    { 0x39, SONYPI_EVENT_ZOOM_PRESSED },
    { 0x10, SONYPI_EVENT_ZOOM_IN_PRESSED },
    { 0x20, SONYPI_EVENT_ZOOM_OUT_PRESSED },
    { 0x04, SONYPI_EVENT_ZOOM_PRESSED },
    { 0, 0 }
};

/* The set of possible thumbphrase events */
static struct sonypi_event sonypi_thumbphraseev[] = {
    { 0x3a, SONYPI_EVENT_THUMBPHRASE_PRESSED },
    { 0, 0 }
};

/* The set of possible motioneye camera events */
static struct sonypi_event sonypi_meyeev[] = {
    { 0x00, SONYPI_EVENT_MEYE_FACE },
    { 0x01, SONYPI_EVENT_MEYE_OPPOSITE },
    { 0, 0 }
};

/* The set of possible memorystick events */
static struct sonypi_event sonypi_memorystickev[] = {
    { 0x53, SONYPI_EVENT_MEMORYSTICK_INSERT },
    { 0x54, SONYPI_EVENT_MEMORYSTICK_EJECT },
    { 0, 0 }
};

/* The set of possible battery events */
static struct sonypi_event sonypi_batteryev[] = {
    { 0x20, SONYPI_EVENT_BATTERY_INSERT },
    { 0x30, SONYPI_EVENT_BATTERY_REMOVE },
    { 0, 0 }
};

/* The set of possible volume events */
static struct sonypi_event sonypi_volumeev[] = {
    { 0x01, SONYPI_EVENT_VOLUME_INC_PRESSED },
    { 0x02, SONYPI_EVENT_VOLUME_DEC_PRESSED },
    { 0, 0 }
};

/* The set of possible brightness events */
static struct sonypi_event sonypi_brightnessev[] = {
    { 0x80, SONYPI_EVENT_BRIGHTNESS_PRESSED },
    { 0, 0 }
};

static struct sonypi_eventtypes type1_events[] = {
    { 0, 0xffffffff, sonypi_releaseev },
    { 0x70, SONYPI_MEYE_MASK, sonypi_meyeev },
    { 0x30, SONYPI_LID_MASK, sonypi_lidev },
    { 0x60, SONYPI_CAPTURE_MASK, sonypi_captureev },
    { 0x10, SONYPI_JOGGER_MASK, sonypi_joggerev },
    { 0x20, SONYPI_FNKEY_MASK, sonypi_fnkeyev },
    { 0x30, SONYPI_BLUETOOTH_MASK, sonypi_blueev },
    { 0x40, SONYPI_PKEY_MASK, sonypi_pkeyev },
    { 0x30, SONYPI_MEMORYSTICK_MASK, sonypi_memorystickev },
    { 0x40, SONYPI_BATTERY_MASK, sonypi_batteryev },
    { 0 },
};
static struct sonypi_eventtypes type2_events[] = {
    { 0, 0xffffffff, sonypi_releaseev },
    { 0x38, SONYPI_LID_MASK, sonypi_lidev },
    { 0x11, SONYPI_JOGGER_MASK, sonypi_joggerev },
    { 0x61, SONYPI_CAPTURE_MASK, sonypi_captureev },
    { 0x21, SONYPI_FNKEY_MASK, sonypi_fnkeyev },
    { 0x31, SONYPI_BLUETOOTH_MASK, sonypi_blueev },
    { 0x08, SONYPI_PKEY_MASK, sonypi_pkeyev },
    { 0x11, SONYPI_BACK_MASK, sonypi_backev },
    { 0x21, SONYPI_HELP_MASK, sonypi_helpev },
    { 0x21, SONYPI_ZOOM_MASK, sonypi_zoomev },
    { 0x20, SONYPI_THUMBPHRASE_MASK, sonypi_thumbphraseev },
    { 0x31, SONYPI_MEMORYSTICK_MASK, sonypi_memorystickev },
    { 0x41, SONYPI_BATTERY_MASK, sonypi_batteryev },
    { 0x31, SONYPI_PKEY_MASK, sonypi_pkeyev },
    { 0 },
};
static struct sonypi_eventtypes type3_events[] = {
    { 0, 0xffffffff, sonypi_releaseev },
    { 0x21, SONYPI_FNKEY_MASK, sonypi_fnkeyev },
    { 0x31, SONYPI_WIRELESS_MASK, sonypi_wlessev },
    { 0x31, SONYPI_MEMORYSTICK_MASK, sonypi_memorystickev },
    { 0x41, SONYPI_BATTERY_MASK, sonypi_batteryev },
    { 0x31, SONYPI_PKEY_MASK, sonypi_pkeyev },
    { 0x05, SONYPI_PKEY_MASK, sonypi_pkeyev },
    { 0x05, SONYPI_ZOOM_MASK, sonypi_zoomev },
    { 0x05, SONYPI_CAPTURE_MASK, sonypi_captureev },
    { 0x05, SONYPI_PKEY_MASK, sonypi_volumeev },
    { 0x05, SONYPI_PKEY_MASK, sonypi_brightnessev },
    { 0 },
};

/* low level spic calls */
#define ITERATIONS_LONG     10000
#define ITERATIONS_SHORT    10
#define wait_on_command(command, iterations) {              \
    unsigned int n = iterations;                    \
    while (--n && (command))                    \
        udelay(1);                      \
    if (!n)                             \
        dprintk("command failed at %s : %s (line %d)\n",    \
                __FILE__, __func__, __LINE__);  \
}

static u8 sony_pic_call1(u8 dev)
{
    u8 v1, v2;

    wait_on_command(inb_p(spic_dev.cur_ioport->io1.minimum + 4) & 2,
            ITERATIONS_LONG);
    outb(dev, spic_dev.cur_ioport->io1.minimum + 4);
    v1 = inb_p(spic_dev.cur_ioport->io1.minimum + 4);
    v2 = inb_p(spic_dev.cur_ioport->io1.minimum);
    dprintk("sony_pic_call1(0x%.2x): 0x%.4x\n", dev, (v2 << 8) | v1);
    return v2;
}

static u8 sony_pic_call2(u8 dev, u8 fn)
{
    u8 v1;

    wait_on_command(inb_p(spic_dev.cur_ioport->io1.minimum + 4) & 2,
            ITERATIONS_LONG);
    outb(dev, spic_dev.cur_ioport->io1.minimum + 4);
    wait_on_command(inb_p(spic_dev.cur_ioport->io1.minimum + 4) & 2,
            ITERATIONS_LONG);
    outb(fn, spic_dev.cur_ioport->io1.minimum);
    v1 = inb_p(spic_dev.cur_ioport->io1.minimum);
    dprintk("sony_pic_call2(0x%.2x - 0x%.2x): 0x%.4x\n", dev, fn, v1);
    return v1;
}

static u8 sony_pic_call3(u8 dev, u8 fn, u8 v)
{
    u8 v1;

    wait_on_command(inb_p(spic_dev.cur_ioport->io1.minimum + 4) & 2, ITERATIONS_LONG);
    outb(dev, spic_dev.cur_ioport->io1.minimum + 4);
    wait_on_command(inb_p(spic_dev.cur_ioport->io1.minimum + 4) & 2, ITERATIONS_LONG);
    outb(fn, spic_dev.cur_ioport->io1.minimum);
    wait_on_command(inb_p(spic_dev.cur_ioport->io1.minimum + 4) & 2, ITERATIONS_LONG);
    outb(v, spic_dev.cur_ioport->io1.minimum);
    v1 = inb_p(spic_dev.cur_ioport->io1.minimum);
    dprintk("sony_pic_call3(0x%.2x - 0x%.2x - 0x%.2x): 0x%.4x\n",
            dev, fn, v, v1);
    return v1;
}

/*
 * minidrivers for SPIC models
 */
static int type3_handle_irq(const u8 data_mask, const u8 ev)
{
    /*
     * 0x31 could mean we have to take some extra action and wait for
     * the next irq for some Type3 models, it will generate a new
     * irq and we can read new data from the device:
     *  - 0x5c and 0x5f requires 0xA0
     *  - 0x61 requires 0xB3
     */
    if (data_mask == 0x31) {
        if (ev == 0x5c || ev == 0x5f)
            sony_pic_call1(0xA0);
        else if (ev == 0x61)
            sony_pic_call1(0xB3);
        return 0;
    }
    return 1;
}

static void sony_pic_detect_device_type(struct sony_pic_dev *dev)
{
    struct pci_dev *pcidev;

    pcidev = pci_get_device(PCI_VENDOR_ID_INTEL,
            PCI_DEVICE_ID_INTEL_82371AB_3, NULL);
    if (pcidev) {
        dev->model = SONYPI_DEVICE_TYPE1;
        dev->evport_offset = SONYPI_TYPE1_OFFSET;
        dev->event_types = type1_events;
        goto out;
    }

    pcidev = pci_get_device(PCI_VENDOR_ID_INTEL,
            PCI_DEVICE_ID_INTEL_ICH6_1, NULL);
    if (pcidev) {
        dev->model = SONYPI_DEVICE_TYPE2;
        dev->evport_offset = SONYPI_TYPE2_OFFSET;
        dev->event_types = type2_events;
        goto out;
    }

    pcidev = pci_get_device(PCI_VENDOR_ID_INTEL,
            PCI_DEVICE_ID_INTEL_ICH7_1, NULL);
    if (pcidev) {
        dev->model = SONYPI_DEVICE_TYPE3;
        dev->handle_irq = type3_handle_irq;
        dev->evport_offset = SONYPI_TYPE3_OFFSET;
        dev->event_types = type3_events;
        goto out;
    }

    pcidev = pci_get_device(PCI_VENDOR_ID_INTEL,
            PCI_DEVICE_ID_INTEL_ICH8_4, NULL);
    if (pcidev) {
        dev->model = SONYPI_DEVICE_TYPE3;
        dev->handle_irq = type3_handle_irq;
        dev->evport_offset = SONYPI_TYPE3_OFFSET;
        dev->event_types = type3_events;
        goto out;
    }

    pcidev = pci_get_device(PCI_VENDOR_ID_INTEL,
            PCI_DEVICE_ID_INTEL_ICH9_1, NULL);
    if (pcidev) {
        dev->model = SONYPI_DEVICE_TYPE3;
        dev->handle_irq = type3_handle_irq;
        dev->evport_offset = SONYPI_TYPE3_OFFSET;
        dev->event_types = type3_events;
        goto out;
    }

    /* default */
    dev->model = SONYPI_DEVICE_TYPE2;
    dev->evport_offset = SONYPI_TYPE2_OFFSET;
    dev->event_types = type2_events;

out:
    if (pcidev)
        pci_dev_put(pcidev);

    pr_info("detected Type%d model\n",
        dev->model == SONYPI_DEVICE_TYPE1 ? 1 :
        dev->model == SONYPI_DEVICE_TYPE2 ? 2 : 3);
}

/* camera tests and poweron/poweroff */
#define SONYPI_CAMERA_PICTURE       5
#define SONYPI_CAMERA_CONTROL       0x10

#define SONYPI_CAMERA_BRIGHTNESS        0
#define SONYPI_CAMERA_CONTRAST          1
#define SONYPI_CAMERA_HUE           2
#define SONYPI_CAMERA_COLOR         3
#define SONYPI_CAMERA_SHARPNESS         4

#define SONYPI_CAMERA_EXPOSURE_MASK     0xC
#define SONYPI_CAMERA_WHITE_BALANCE_MASK    0x3
#define SONYPI_CAMERA_PICTURE_MODE_MASK     0x30
#define SONYPI_CAMERA_MUTE_MASK         0x40

/* the rest don't need a loop until not 0xff */
#define SONYPI_CAMERA_AGC           6
#define SONYPI_CAMERA_AGC_MASK          0x30
#define SONYPI_CAMERA_SHUTTER_MASK      0x7

#define SONYPI_CAMERA_SHUTDOWN_REQUEST      7
#define SONYPI_CAMERA_CONTROL           0x10

#define SONYPI_CAMERA_STATUS            7
#define SONYPI_CAMERA_STATUS_READY      0x2
#define SONYPI_CAMERA_STATUS_POSITION       0x4

#define SONYPI_DIRECTION_BACKWARDS      0x4

#define SONYPI_CAMERA_REVISION          8
#define SONYPI_CAMERA_ROMVERSION        9

static int __sony_pic_camera_ready(void)
{
    u8 v;

    v = sony_pic_call2(0x8f, SONYPI_CAMERA_STATUS);
    return (v != 0xff && (v & SONYPI_CAMERA_STATUS_READY));
}

static int __sony_pic_camera_off(void)
{
    if (!camera) {
        pr_warn("camera control not enabled\n");
        return -ENODEV;
    }

    wait_on_command(sony_pic_call3(0x90, SONYPI_CAMERA_PICTURE,
                SONYPI_CAMERA_MUTE_MASK),
            ITERATIONS_SHORT);

    if (spic_dev.camera_power) {
        sony_pic_call2(0x91, 0);
        spic_dev.camera_power = 0;
    }
    return 0;
}

static int __sony_pic_camera_on(void)
{
    int i, j, x;

    if (!camera) {
        pr_warn("camera control not enabled\n");
        return -ENODEV;
    }

    if (spic_dev.camera_power)
        return 0;

    for (j = 5; j > 0; j--) {

        for (x = 0; x < 100 && sony_pic_call2(0x91, 0x1); x++)
            msleep(10);
        sony_pic_call1(0x93);

        for (i = 400; i > 0; i--) {
            if (__sony_pic_camera_ready())
                break;
            msleep(10);
        }
        if (i)
            break;
    }

    if (j == 0) {
        pr_warn("failed to power on camera\n");
        return -ENODEV;
    }

    wait_on_command(sony_pic_call3(0x90, SONYPI_CAMERA_CONTROL,
                0x5a),
            ITERATIONS_SHORT);

    spic_dev.camera_power = 1;
    return 0;
}

/* External camera command (exported to the motion eye v4l driver) */
int sony_pic_camera_command(int command, u8 value)
{
    if (!camera)
        return -EIO;

    mutex_lock(&spic_dev.lock);

    switch (command) {
    case SONY_PIC_COMMAND_SETCAMERA:
        if (value)
            __sony_pic_camera_on();
        else
            __sony_pic_camera_off();
        break;
    case SONY_PIC_COMMAND_SETCAMERABRIGHTNESS:
        wait_on_command(sony_pic_call3(0x90, SONYPI_CAMERA_BRIGHTNESS, value),
                ITERATIONS_SHORT);
        break;
    case SONY_PIC_COMMAND_SETCAMERACONTRAST:
        wait_on_command(sony_pic_call3(0x90, SONYPI_CAMERA_CONTRAST, value),
                ITERATIONS_SHORT);
        break;
    case SONY_PIC_COMMAND_SETCAMERAHUE:
        wait_on_command(sony_pic_call3(0x90, SONYPI_CAMERA_HUE, value),
                ITERATIONS_SHORT);
        break;
    case SONY_PIC_COMMAND_SETCAMERACOLOR:
        wait_on_command(sony_pic_call3(0x90, SONYPI_CAMERA_COLOR, value),
                ITERATIONS_SHORT);
        break;
    case SONY_PIC_COMMAND_SETCAMERASHARPNESS:
        wait_on_command(sony_pic_call3(0x90, SONYPI_CAMERA_SHARPNESS, value),
                ITERATIONS_SHORT);
        break;
    case SONY_PIC_COMMAND_SETCAMERAPICTURE:
        wait_on_command(sony_pic_call3(0x90, SONYPI_CAMERA_PICTURE, value),
                ITERATIONS_SHORT);
        break;
    case SONY_PIC_COMMAND_SETCAMERAAGC:
        wait_on_command(sony_pic_call3(0x90, SONYPI_CAMERA_AGC, value),
                ITERATIONS_SHORT);
        break;
    default:
        pr_err("sony_pic_camera_command invalid: %d\n", command);
        break;
    }
    mutex_unlock(&spic_dev.lock);
    return 0;
}
EXPORT_SYMBOL(sony_pic_camera_command);

/* gprs/edge modem (SZ460N and SZ210P), thanks to Joshua Wise */
static void __sony_pic_set_wwanpower(u8 state)
{
    state = !!state;
    if (spic_dev.wwan_power == state)
        return;
    sony_pic_call2(0xB0, state);
    sony_pic_call1(0x82);
    spic_dev.wwan_power = state;
}

static ssize_t sony_pic_wwanpower_store(struct device *dev,
        struct device_attribute *attr,
        const char *buffer, size_t count)
{
    unsigned long value;
    if (count > 31)
        return -EINVAL;

    if (kstrtoul(buffer, 10, &value))
        return -EINVAL;

    mutex_lock(&spic_dev.lock);
    __sony_pic_set_wwanpower(value);
    mutex_unlock(&spic_dev.lock);

    return count;
}

static ssize_t sony_pic_wwanpower_show(struct device *dev,
        struct device_attribute *attr, char *buffer)
{
    ssize_t count;
    mutex_lock(&spic_dev.lock);
    count = snprintf(buffer, PAGE_SIZE, "%d\n", spic_dev.wwan_power);
    mutex_unlock(&spic_dev.lock);
    return count;
}

/* bluetooth subsystem power state */
static void __sony_pic_set_bluetoothpower(u8 state)
{
    state = !!state;
    if (spic_dev.bluetooth_power == state)
        return;
    sony_pic_call2(0x96, state);
    sony_pic_call1(0x82);
    spic_dev.bluetooth_power = state;
}

static ssize_t sony_pic_bluetoothpower_store(struct device *dev,
        struct device_attribute *attr,
        const char *buffer, size_t count)
{
    unsigned long value;
    if (count > 31)
        return -EINVAL;

    if (kstrtoul(buffer, 10, &value))
        return -EINVAL;

    mutex_lock(&spic_dev.lock);
    __sony_pic_set_bluetoothpower(value);
    mutex_unlock(&spic_dev.lock);

    return count;
}

static ssize_t sony_pic_bluetoothpower_show(struct device *dev,
        struct device_attribute *attr, char *buffer)
{
    ssize_t count = 0;
    mutex_lock(&spic_dev.lock);
    count = snprintf(buffer, PAGE_SIZE, "%d\n", spic_dev.bluetooth_power);
    mutex_unlock(&spic_dev.lock);
    return count;
}

/* fan speed */
/* FAN0 information (reverse engineered from ACPI tables) */
#define SONY_PIC_FAN0_STATUS    0x93
static int sony_pic_set_fanspeed(unsigned long value)
{
    return ec_write(SONY_PIC_FAN0_STATUS, value);
}

static int sony_pic_get_fanspeed(u8 *value)
{
    return ec_read(SONY_PIC_FAN0_STATUS, value);
}

static ssize_t sony_pic_fanspeed_store(struct device *dev,
        struct device_attribute *attr,
        const char *buffer, size_t count)
{
    unsigned long value;
    if (count > 31)
        return -EINVAL;

    if (kstrtoul(buffer, 10, &value))
        return -EINVAL;

    if (sony_pic_set_fanspeed(value))
        return -EIO;

    return count;
}

static ssize_t sony_pic_fanspeed_show(struct device *dev,
        struct device_attribute *attr, char *buffer)
{
    u8 value = 0;
    if (sony_pic_get_fanspeed(&value))
        return -EIO;

    return snprintf(buffer, PAGE_SIZE, "%d\n", value);
}

#define SPIC_ATTR(_name, _mode)                 \
struct device_attribute spic_attr_##_name = __ATTR(_name,   \
        _mode, sony_pic_## _name ##_show,       \
        sony_pic_## _name ##_store)

static SPIC_ATTR(bluetoothpower, 0644);
static SPIC_ATTR(wwanpower, 0644);
static SPIC_ATTR(fanspeed, 0644);

static struct attribute *spic_attributes[] = {
    &spic_attr_bluetoothpower.attr,
    &spic_attr_wwanpower.attr,
    &spic_attr_fanspeed.attr,
    NULL
};

static struct attribute_group spic_attribute_group = {
    .attrs = spic_attributes
};

/******** SONYPI compatibility **********/
#ifdef CONFIG_SONYPI_COMPAT

/* battery / brightness / temperature  addresses */
#define SONYPI_BAT_FLAGS    0x81
#define SONYPI_LCD_LIGHT    0x96
#define SONYPI_BAT1_PCTRM   0xa0
#define SONYPI_BAT1_LEFT    0xa2
#define SONYPI_BAT1_MAXRT   0xa4
#define SONYPI_BAT2_PCTRM   0xa8
#define SONYPI_BAT2_LEFT    0xaa
#define SONYPI_BAT2_MAXRT   0xac
#define SONYPI_BAT1_MAXTK   0xb0
#define SONYPI_BAT1_FULL    0xb2
#define SONYPI_BAT2_MAXTK   0xb8
#define SONYPI_BAT2_FULL    0xba
#define SONYPI_TEMP_STATUS  0xC1

struct sonypi_compat_s {
    struct fasync_struct    *fifo_async;
    struct kfifo        fifo;
    spinlock_t      fifo_lock;
    wait_queue_head_t   fifo_proc_list;
    atomic_t        open_count;
};
static struct sonypi_compat_s sonypi_compat = {
    .open_count = ATOMIC_INIT(0),
};

static int sonypi_misc_fasync(int fd, struct file *filp, int on)
{
    return fasync_helper(fd, filp, on, &sonypi_compat.fifo_async);
}

static int sonypi_misc_release(struct inode *inode, struct file *file)
{
    atomic_dec(&sonypi_compat.open_count);
    return 0;
}

static int sonypi_misc_open(struct inode *inode, struct file *file)
{
    /* Flush input queue on first open */
    unsigned long flags;

    spin_lock_irqsave(&sonypi_compat.fifo_lock, flags);

    if (atomic_inc_return(&sonypi_compat.open_count) == 1)
        kfifo_reset(&sonypi_compat.fifo);

    spin_unlock_irqrestore(&sonypi_compat.fifo_lock, flags);

    return 0;
}

static ssize_t sonypi_misc_read(struct file *file, char __user *buf,
                size_t count, loff_t *pos)
{
    ssize_t ret;
    unsigned char c;

    if ((kfifo_len(&sonypi_compat.fifo) == 0) &&
        (file->f_flags & O_NONBLOCK))
        return -EAGAIN;

    ret = wait_event_interruptible(sonypi_compat.fifo_proc_list,
                       kfifo_len(&sonypi_compat.fifo) != 0);
    if (ret)
        return ret;

    while (ret < count &&
           (kfifo_out_locked(&sonypi_compat.fifo, &c, sizeof(c),
              &sonypi_compat.fifo_lock) == sizeof(c))) {
        if (put_user(c, buf++))
            return -EFAULT;
        ret++;
    }

    if (ret > 0) {
        struct inode *inode = file->f_path.dentry->d_inode;
        inode->i_atime = current_fs_time(inode->i_sb);
    }

    return ret;
}

static unsigned int sonypi_misc_poll(struct file *file, poll_table *wait)
{
    poll_wait(file, &sonypi_compat.fifo_proc_list, wait);
    if (kfifo_len(&sonypi_compat.fifo))
        return POLLIN | POLLRDNORM;
    return 0;
}

static int ec_read16(u8 addr, u16 *value)
{
    u8 val_lb, val_hb;
    if (ec_read(addr, &val_lb))
        return -1;
    if (ec_read(addr + 1, &val_hb))
        return -1;
    *value = val_lb | (val_hb << 8);
    return 0;
}

static long sonypi_misc_ioctl(struct file *fp, unsigned int cmd,
                            unsigned long arg)
{
    int ret = 0;
    void __user *argp = (void __user *)arg;
    u8 val8;
    u16 val16;
    int value;

    mutex_lock(&spic_dev.lock);
    switch (cmd) {
    case SONYPI_IOCGBRT:
        if (sony_bl_props.dev == NULL) {
            ret = -EIO;
            break;
        }
        if (sony_nc_int_call(sony_nc_acpi_handle, "GBRT", NULL,
                    &value)) {
            ret = -EIO;
            break;
        }
        val8 = ((value & 0xff) - 1) << 5;
        if (copy_to_user(argp, &val8, sizeof(val8)))
                ret = -EFAULT;
        break;
    case SONYPI_IOCSBRT:
        if (sony_bl_props.dev == NULL) {
            ret = -EIO;
            break;
        }
        if (copy_from_user(&val8, argp, sizeof(val8))) {
            ret = -EFAULT;
            break;
        }
        value = (val8 >> 5) + 1;
        if (sony_nc_int_call(sony_nc_acpi_handle, "SBRT", &value,
                    NULL)) {
            ret = -EIO;
            break;
        }
        /* sync the backlight device status */
        sony_bl_props.dev->props.brightness =
            sony_backlight_get_brightness(sony_bl_props.dev);
        break;
    case SONYPI_IOCGBAT1CAP:
        if (ec_read16(SONYPI_BAT1_FULL, &val16)) {
            ret = -EIO;
            break;
        }
        if (copy_to_user(argp, &val16, sizeof(val16)))
            ret = -EFAULT;
        break;
    case SONYPI_IOCGBAT1REM:
        if (ec_read16(SONYPI_BAT1_LEFT, &val16)) {
            ret = -EIO;
            break;
        }
        if (copy_to_user(argp, &val16, sizeof(val16)))
            ret = -EFAULT;
        break;
    case SONYPI_IOCGBAT2CAP:
        if (ec_read16(SONYPI_BAT2_FULL, &val16)) {
            ret = -EIO;
            break;
        }
        if (copy_to_user(argp, &val16, sizeof(val16)))
            ret = -EFAULT;
        break;
    case SONYPI_IOCGBAT2REM:
        if (ec_read16(SONYPI_BAT2_LEFT, &val16)) {
            ret = -EIO;
            break;
        }
        if (copy_to_user(argp, &val16, sizeof(val16)))
            ret = -EFAULT;
        break;
    case SONYPI_IOCGBATFLAGS:
        if (ec_read(SONYPI_BAT_FLAGS, &val8)) {
            ret = -EIO;
            break;
        }
        val8 &= 0x07;
        if (copy_to_user(argp, &val8, sizeof(val8)))
            ret = -EFAULT;
        break;
    case SONYPI_IOCGBLUE:
        val8 = spic_dev.bluetooth_power;
        if (copy_to_user(argp, &val8, sizeof(val8)))
            ret = -EFAULT;
        break;
    case SONYPI_IOCSBLUE:
        if (copy_from_user(&val8, argp, sizeof(val8))) {
            ret = -EFAULT;
            break;
        }
        __sony_pic_set_bluetoothpower(val8);
        break;
    /* FAN Controls */
    case SONYPI_IOCGFAN:
        if (sony_pic_get_fanspeed(&val8)) {
            ret = -EIO;
            break;
        }
        if (copy_to_user(argp, &val8, sizeof(val8)))
            ret = -EFAULT;
        break;
    case SONYPI_IOCSFAN:
        if (copy_from_user(&val8, argp, sizeof(val8))) {
            ret = -EFAULT;
            break;
        }
        if (sony_pic_set_fanspeed(val8))
            ret = -EIO;
        break;
    /* GET Temperature (useful under APM) */
    case SONYPI_IOCGTEMP:
        if (ec_read(SONYPI_TEMP_STATUS, &val8)) {
            ret = -EIO;
            break;
        }
        if (copy_to_user(argp, &val8, sizeof(val8)))
            ret = -EFAULT;
        break;
    default:
        ret = -EINVAL;
    }
    mutex_unlock(&spic_dev.lock);
    return ret;
}

static const struct file_operations sonypi_misc_fops = {
    .owner      = THIS_MODULE,
    .read       = sonypi_misc_read,
    .poll       = sonypi_misc_poll,
    .open       = sonypi_misc_open,
    .release    = sonypi_misc_release,
    .fasync     = sonypi_misc_fasync,
    .unlocked_ioctl = sonypi_misc_ioctl,
    .llseek     = noop_llseek,
};

static struct miscdevice sonypi_misc_device = {
    .minor      = MISC_DYNAMIC_MINOR,
    .name       = "sonypi",
    .fops       = &sonypi_misc_fops,
};

static void sonypi_compat_report_event(u8 event)
{
    kfifo_in_locked(&sonypi_compat.fifo, (unsigned char *)&event,
            sizeof(event), &sonypi_compat.fifo_lock);
    kill_fasync(&sonypi_compat.fifo_async, SIGIO, POLL_IN);
    wake_up_interruptible(&sonypi_compat.fifo_proc_list);
}

static int sonypi_compat_init(void)
{
    int error;

    spin_lock_init(&sonypi_compat.fifo_lock);
    error =
     kfifo_alloc(&sonypi_compat.fifo, SONY_LAPTOP_BUF_SIZE, GFP_KERNEL);
    if (error) {
        pr_err("kfifo_alloc failed\n");
        return error;
    }

    init_waitqueue_head(&sonypi_compat.fifo_proc_list);

    if (minor != -1)
        sonypi_misc_device.minor = minor;
    error = misc_register(&sonypi_misc_device);
    if (error) {
        pr_err("misc_register failed\n");
        goto err_free_kfifo;
    }
    if (minor == -1)
        pr_info("device allocated minor is %d\n",
            sonypi_misc_device.minor);

    return 0;

err_free_kfifo:
    kfifo_free(&sonypi_compat.fifo);
    return error;
}

static void sonypi_compat_exit(void)
{
    misc_deregister(&sonypi_misc_device);
    kfifo_free(&sonypi_compat.fifo);
}
#else
static int sonypi_compat_init(void) { return 0; }
static void sonypi_compat_exit(void) { }
static void sonypi_compat_report_event(u8 event) { }
#endif /* CONFIG_SONYPI_COMPAT */

/*
 * ACPI callbacks
 */
static acpi_status
sony_pic_read_possible_resource(struct acpi_resource *resource, void *context)
{
    u32 i;
    struct sony_pic_dev *dev = (struct sony_pic_dev *)context;

    switch (resource->type) {
    case ACPI_RESOURCE_TYPE_START_DEPENDENT:
        {
            /* start IO enumeration */
            struct sony_pic_ioport *ioport = kzalloc(sizeof(*ioport), GFP_KERNEL);
            if (!ioport)
                return AE_ERROR;

            list_add(&ioport->list, &dev->ioports);
            return AE_OK;
        }

    case ACPI_RESOURCE_TYPE_END_DEPENDENT:
        /* end IO enumeration */
        return AE_OK;

    case ACPI_RESOURCE_TYPE_IRQ:
        {
            struct acpi_resource_irq *p = &resource->data.irq;
            struct sony_pic_irq *interrupt = NULL;
            if (!p || !p->interrupt_count) {
                /*
                 * IRQ descriptors may have no IRQ# bits set,
                 * particularly those those w/ _STA disabled
                 */
                dprintk("Blank IRQ resource\n");
                return AE_OK;
            }
            for (i = 0; i < p->interrupt_count; i++) {
                if (!p->interrupts[i]) {
                    pr_warn("Invalid IRQ %d\n",
                        p->interrupts[i]);
                    continue;
                }
                interrupt = kzalloc(sizeof(*interrupt),
                        GFP_KERNEL);
                if (!interrupt)
                    return AE_ERROR;

                list_add(&interrupt->list, &dev->interrupts);
                interrupt->irq.triggering = p->triggering;
                interrupt->irq.polarity = p->polarity;
                interrupt->irq.sharable = p->sharable;
                interrupt->irq.interrupt_count = 1;
                interrupt->irq.interrupts[0] = p->interrupts[i];
            }
            return AE_OK;
        }
    case ACPI_RESOURCE_TYPE_IO:
        {
            struct acpi_resource_io *io = &resource->data.io;
            struct sony_pic_ioport *ioport =
                list_first_entry(&dev->ioports, struct sony_pic_ioport, list);
            if (!io) {
                dprintk("Blank IO resource\n");
                return AE_OK;
            }

            if (!ioport->io1.minimum) {
                memcpy(&ioport->io1, io, sizeof(*io));
                dprintk("IO1 at 0x%.4x (0x%.2x)\n", ioport->io1.minimum,
                        ioport->io1.address_length);
            }
            else if (!ioport->io2.minimum) {
                memcpy(&ioport->io2, io, sizeof(*io));
                dprintk("IO2 at 0x%.4x (0x%.2x)\n", ioport->io2.minimum,
                        ioport->io2.address_length);
            }
            else {
                pr_err("Unknown SPIC Type, more than 2 IO Ports\n");
                return AE_ERROR;
            }
            return AE_OK;
        }
    default:
        dprintk("Resource %d isn't an IRQ nor an IO port\n",
            resource->type);

    case ACPI_RESOURCE_TYPE_END_TAG:
        return AE_OK;
    }
    return AE_CTRL_TERMINATE;
}

static int sony_pic_possible_resources(struct acpi_device *device)
{
    int result = 0;
    acpi_status status = AE_OK;

    if (!device)
        return -EINVAL;

    /* get device status */
    /* see acpi_pci_link_get_current acpi_pci_link_get_possible */
    dprintk("Evaluating _STA\n");
    result = acpi_bus_get_status(device);
    if (result) {
        pr_warn("Unable to read status\n");
        goto end;
    }

    if (!device->status.enabled)
        dprintk("Device disabled\n");
    else
        dprintk("Device enabled\n");

    /*
     * Query and parse 'method'
     */
    dprintk("Evaluating %s\n", METHOD_NAME__PRS);
    status = acpi_walk_resources(device->handle, METHOD_NAME__PRS,
            sony_pic_read_possible_resource, &spic_dev);
    if (ACPI_FAILURE(status)) {
        pr_warn("Failure evaluating %s\n", METHOD_NAME__PRS);
        result = -ENODEV;
    }
end:
    return result;
}

/*
 *  Disable the spic device by calling its _DIS method
 */
static int sony_pic_disable(struct acpi_device *device)
{
    acpi_status ret = acpi_evaluate_object(device->handle, "_DIS", NULL,
                           NULL);

    if (ACPI_FAILURE(ret) && ret != AE_NOT_FOUND)
        return -ENXIO;

    dprintk("Device disabled\n");
    return 0;
}


/*
 *  Based on drivers/acpi/pci_link.c:acpi_pci_link_set
 *
 *  Call _SRS to set current resources
 */
static int sony_pic_enable(struct acpi_device *device,
        struct sony_pic_ioport *ioport, struct sony_pic_irq *irq)
{
    acpi_status status;
    int result = 0;
    /* Type 1 resource layout is:
     *    IO
     *    IO
     *    IRQNoFlags
     *    End
     *
     * Type 2 and 3 resource layout is:
     *    IO
     *    IRQNoFlags
     *    End
     */
    struct {
        struct acpi_resource res1;
        struct acpi_resource res2;
        struct acpi_resource res3;
        struct acpi_resource res4;
    } *resource;
    struct acpi_buffer buffer = { 0, NULL };

    if (!ioport || !irq)
        return -EINVAL;

    /* init acpi_buffer */
    resource = kzalloc(sizeof(*resource) + 1, GFP_KERNEL);
    if (!resource)
        return -ENOMEM;

    buffer.length = sizeof(*resource) + 1;
    buffer.pointer = resource;

    /* setup Type 1 resources */
    if (spic_dev.model == SONYPI_DEVICE_TYPE1) {

        /* setup io resources */
        resource->res1.type = ACPI_RESOURCE_TYPE_IO;
        resource->res1.length = sizeof(struct acpi_resource);
        memcpy(&resource->res1.data.io, &ioport->io1,
                sizeof(struct acpi_resource_io));

        resource->res2.type = ACPI_RESOURCE_TYPE_IO;
        resource->res2.length = sizeof(struct acpi_resource);
        memcpy(&resource->res2.data.io, &ioport->io2,
                sizeof(struct acpi_resource_io));

        /* setup irq resource */
        resource->res3.type = ACPI_RESOURCE_TYPE_IRQ;
        resource->res3.length = sizeof(struct acpi_resource);
        memcpy(&resource->res3.data.irq, &irq->irq,
                sizeof(struct acpi_resource_irq));
        /* we requested a shared irq */
        resource->res3.data.irq.sharable = ACPI_SHARED;

        resource->res4.type = ACPI_RESOURCE_TYPE_END_TAG;

    }
    /* setup Type 2/3 resources */
    else {
        /* setup io resource */
        resource->res1.type = ACPI_RESOURCE_TYPE_IO;
        resource->res1.length = sizeof(struct acpi_resource);
        memcpy(&resource->res1.data.io, &ioport->io1,
                sizeof(struct acpi_resource_io));

        /* setup irq resource */
        resource->res2.type = ACPI_RESOURCE_TYPE_IRQ;
        resource->res2.length = sizeof(struct acpi_resource);
        memcpy(&resource->res2.data.irq, &irq->irq,
                sizeof(struct acpi_resource_irq));
        /* we requested a shared irq */
        resource->res2.data.irq.sharable = ACPI_SHARED;

        resource->res3.type = ACPI_RESOURCE_TYPE_END_TAG;
    }

    /* Attempt to set the resource */
    dprintk("Evaluating _SRS\n");
    status = acpi_set_current_resources(device->handle, &buffer);

    /* check for total failure */
    if (ACPI_FAILURE(status)) {
        pr_err("Error evaluating _SRS\n");
        result = -ENODEV;
        goto end;
    }

    /* Necessary device initializations calls (from sonypi) */
    sony_pic_call1(0x82);
    sony_pic_call2(0x81, 0xff);
    sony_pic_call1(compat ? 0x92 : 0x82);

end:
    kfree(resource);
    return result;
}

/*****************
 *
 * ISR: some event is available
 *
 *****************/
static irqreturn_t sony_pic_irq(int irq, void *dev_id)
{
    int i, j;
    u8 ev = 0;
    u8 data_mask = 0;
    u8 device_event = 0;

    struct sony_pic_dev *dev = (struct sony_pic_dev *) dev_id;

    ev = inb_p(dev->cur_ioport->io1.minimum);
    if (dev->cur_ioport->io2.minimum)
        data_mask = inb_p(dev->cur_ioport->io2.minimum);
    else
        data_mask = inb_p(dev->cur_ioport->io1.minimum +
                dev->evport_offset);

    dprintk("event ([%.2x] [%.2x]) at port 0x%.4x(+0x%.2x)\n",
            ev, data_mask, dev->cur_ioport->io1.minimum,
            dev->evport_offset);

    if (ev == 0x00 || ev == 0xff)
        return IRQ_HANDLED;

    for (i = 0; dev->event_types[i].mask; i++) {

        if ((data_mask & dev->event_types[i].data) !=
            dev->event_types[i].data)
            continue;

        if (!(mask & dev->event_types[i].mask))
            continue;

        for (j = 0; dev->event_types[i].events[j].event; j++) {
            if (ev == dev->event_types[i].events[j].data) {
                device_event =
                    dev->event_types[i].events[j].event;
                /* some events may require ignoring */
                if (!device_event)
                    return IRQ_HANDLED;
                goto found;
            }
        }
    }
    /* Still not able to decode the event try to pass
     * it over to the minidriver
     */
    if (dev->handle_irq && dev->handle_irq(data_mask, ev) == 0)
        return IRQ_HANDLED;

    dprintk("unknown event ([%.2x] [%.2x]) at port 0x%.4x(+0x%.2x)\n",
            ev, data_mask, dev->cur_ioport->io1.minimum,
            dev->evport_offset);
    return IRQ_HANDLED;

found:
    sony_laptop_report_input_event(device_event);
    acpi_bus_generate_proc_event(dev->acpi_dev, 1, device_event);
    sonypi_compat_report_event(device_event);
    return IRQ_HANDLED;
}

/*****************
 *
 *  ACPI driver
 *
 *****************/
static int sony_pic_remove(struct acpi_device *device, int type)
{
    struct sony_pic_ioport *io, *tmp_io;
    struct sony_pic_irq *irq, *tmp_irq;

    if (sony_pic_disable(device)) {
        pr_err("Couldn't disable device\n");
        return -ENXIO;
    }

    free_irq(spic_dev.cur_irq->irq.interrupts[0], &spic_dev);
    release_region(spic_dev.cur_ioport->io1.minimum,
            spic_dev.cur_ioport->io1.address_length);
    if (spic_dev.cur_ioport->io2.minimum)
        release_region(spic_dev.cur_ioport->io2.minimum,
                spic_dev.cur_ioport->io2.address_length);

    sonypi_compat_exit();

    sony_laptop_remove_input();

    /* pf attrs */
    sysfs_remove_group(&sony_pf_device->dev.kobj, &spic_attribute_group);
    sony_pf_remove();

    list_for_each_entry_safe(io, tmp_io, &spic_dev.ioports, list) {
        list_del(&io->list);
        kfree(io);
    }
    list_for_each_entry_safe(irq, tmp_irq, &spic_dev.interrupts, list) {
        list_del(&irq->list);
        kfree(irq);
    }
    spic_dev.cur_ioport = NULL;
    spic_dev.cur_irq = NULL;

    dprintk(SONY_PIC_DRIVER_NAME " removed.\n");
    return 0;
}

static int sony_pic_add(struct acpi_device *device)
{
    int result;
    struct sony_pic_ioport *io, *tmp_io;
    struct sony_pic_irq *irq, *tmp_irq;

    pr_info("%s v%s\n", SONY_PIC_DRIVER_NAME, SONY_LAPTOP_DRIVER_VERSION);

    spic_dev.acpi_dev = device;
    strcpy(acpi_device_class(device), "sony/hotkey");
    sony_pic_detect_device_type(&spic_dev);
    mutex_init(&spic_dev.lock);

    /* read _PRS resources */
    result = sony_pic_possible_resources(device);
    if (result) {
        pr_err("Unable to read possible resources\n");
        goto err_free_resources;
    }

    /* setup input devices and helper fifo */
    result = sony_laptop_setup_input(device);
    if (result) {
        pr_err("Unable to create input devices\n");
        goto err_free_resources;
    }

    if (sonypi_compat_init())
        goto err_remove_input;

    /* request io port */
    list_for_each_entry_reverse(io, &spic_dev.ioports, list) {
        if (request_region(io->io1.minimum, io->io1.address_length,
                    "Sony Programmable I/O Device")) {
            dprintk("I/O port1: 0x%.4x (0x%.4x) + 0x%.2x\n",
                    io->io1.minimum, io->io1.maximum,
                    io->io1.address_length);
            /* Type 1 have 2 ioports */
            if (io->io2.minimum) {
                if (request_region(io->io2.minimum,
                        io->io2.address_length,
                        "Sony Programmable I/O Device")) {
                    dprintk("I/O port2: 0x%.4x (0x%.4x) + 0x%.2x\n",
                            io->io2.minimum, io->io2.maximum,
                            io->io2.address_length);
                    spic_dev.cur_ioport = io;
                    break;
                }
                else {
                    dprintk("Unable to get I/O port2: "
                            "0x%.4x (0x%.4x) + 0x%.2x\n",
                            io->io2.minimum, io->io2.maximum,
                            io->io2.address_length);
                    release_region(io->io1.minimum,
                            io->io1.address_length);
                }
            }
            else {
                spic_dev.cur_ioport = io;
                break;
            }
        }
    }
    if (!spic_dev.cur_ioport) {
        pr_err("Failed to request_region\n");
        result = -ENODEV;
        goto err_remove_compat;
    }

    /* request IRQ */
    list_for_each_entry_reverse(irq, &spic_dev.interrupts, list) {
        if (!request_irq(irq->irq.interrupts[0], sony_pic_irq,
                    0, "sony-laptop", &spic_dev)) {
            dprintk("IRQ: %d - triggering: %d - "
                    "polarity: %d - shr: %d\n",
                    irq->irq.interrupts[0],
                    irq->irq.triggering,
                    irq->irq.polarity,
                    irq->irq.sharable);
            spic_dev.cur_irq = irq;
            break;
        }
    }
    if (!spic_dev.cur_irq) {
        pr_err("Failed to request_irq\n");
        result = -ENODEV;
        goto err_release_region;
    }

    /* set resource status _SRS */
    result = sony_pic_enable(device, spic_dev.cur_ioport, spic_dev.cur_irq);
    if (result) {
        pr_err("Couldn't enable device\n");
        goto err_free_irq;
    }

    spic_dev.bluetooth_power = -1;
    /* create device attributes */
    result = sony_pf_add();
    if (result)
        goto err_disable_device;

    result = sysfs_create_group(&sony_pf_device->dev.kobj, &spic_attribute_group);
    if (result)
        goto err_remove_pf;

    return 0;

err_remove_pf:
    sony_pf_remove();

err_disable_device:
    sony_pic_disable(device);

err_free_irq:
    free_irq(spic_dev.cur_irq->irq.interrupts[0], &spic_dev);

err_release_region:
    release_region(spic_dev.cur_ioport->io1.minimum,
            spic_dev.cur_ioport->io1.address_length);
    if (spic_dev.cur_ioport->io2.minimum)
        release_region(spic_dev.cur_ioport->io2.minimum,
                spic_dev.cur_ioport->io2.address_length);

err_remove_compat:
    sonypi_compat_exit();

err_remove_input:
    sony_laptop_remove_input();

err_free_resources:
    list_for_each_entry_safe(io, tmp_io, &spic_dev.ioports, list) {
        list_del(&io->list);
        kfree(io);
    }
    list_for_each_entry_safe(irq, tmp_irq, &spic_dev.interrupts, list) {
        list_del(&irq->list);
        kfree(irq);
    }
    spic_dev.cur_ioport = NULL;
    spic_dev.cur_irq = NULL;

    return result;
}

#ifdef CONFIG_PM_SLEEP
static int sony_pic_suspend(struct device *dev)
{
    if (sony_pic_disable(to_acpi_device(dev)))
        return -ENXIO;
    return 0;
}

static int sony_pic_resume(struct device *dev)
{
    sony_pic_enable(to_acpi_device(dev),
            spic_dev.cur_ioport, spic_dev.cur_irq);
    return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(sony_pic_pm, sony_pic_suspend, sony_pic_resume);

static const struct acpi_device_id sony_pic_device_ids[] = {
    {SONY_PIC_HID, 0},
    {"", 0},
};

static struct acpi_driver sony_pic_driver = {
    .name = SONY_PIC_DRIVER_NAME,
    .class = SONY_PIC_CLASS,
    .ids = sony_pic_device_ids,
    .owner = THIS_MODULE,
    .ops = {
        .add = sony_pic_add,
        .remove = sony_pic_remove,
        },
    .drv.pm = &sony_pic_pm,
};

static struct dmi_system_id __initdata sonypi_dmi_table[] = {
    {
        .ident = "Sony Vaio",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
            DMI_MATCH(DMI_PRODUCT_NAME, "PCG-"),
        },
    },
    {
        .ident = "Sony Vaio",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
            DMI_MATCH(DMI_PRODUCT_NAME, "VGN-"),
        },
    },
    { }
};

static int __init sony_laptop_init(void)
{
    int result;

    if (!no_spic && dmi_check_system(sonypi_dmi_table)) {
        result = acpi_bus_register_driver(&sony_pic_driver);
        if (result) {
            pr_err("Unable to register SPIC driver\n");
            goto out;
        }
        spic_drv_registered = 1;
    }

    result = acpi_bus_register_driver(&sony_nc_driver);
    if (result) {
        pr_err("Unable to register SNC driver\n");
        goto out_unregister_pic;
    }

    return 0;

out_unregister_pic:
    if (spic_drv_registered)
        acpi_bus_unregister_driver(&sony_pic_driver);
out:
    return result;
}

static void __exit sony_laptop_exit(void)
{
    acpi_bus_unregister_driver(&sony_nc_driver);
    if (spic_drv_registered)
        acpi_bus_unregister_driver(&sony_pic_driver);
}

module_init(sony_laptop_init);
module_exit(sony_laptop_exit);