/*
 * ACPI Sony Notebook Control Driver (SNC and SPIC)
 *
 * Copyright (C) 2004-2005 Stelian Pop <stelian@popies.net>
 * Copyright (C) 2007-2009 Mattia Dongili <malattia@linux.it>
 *
 * 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 <stelian@popies.net>
 *
 * Copyright (C) 2005 Narayanan R S <nars@kadamba.org>
 *
 * Copyright (C) 2001-2002 Alcôve <www.alcove.com>
 *
 * Copyright (C) 2001 Michael Ashley <m.ashley@unsw.edu.au>
 *
 * Copyright (C) 2001 Junichi Morita <jun1m@mars.dti.ne.jp>
 *
 * Copyright (C) 2000 Takaya Kinjo <t-kinjo@tc4.so-net.ne.jp>
 *
 * Copyright (C) 2000 Andrew Tridgell <tridge@valinux.com>
 *
 * 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_gfx_switch_setup(struct platform_device *pd,
                unsigned int handle);
static void sony_nc_gfx_switch_cleanup(struct platform_device *pd);
static int __sony_nc_gfx_switch_status_get(void);

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)
{
        int ret = 0;
        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);
                memcpy(buffer, object->buffer.pointer, len);

        } else if (object->type == ACPI_TYPE_INTEGER) {
                len = MIN(buflen, sizeof(object->integer.value));
                memcpy(buffer, &object->integer.value, len);

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

        kfree(object);
        return ret;
}

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 == 0x1) ? "switch change" :
                                        (result == 0x2) ? "output switch" :
                                        (result == 0x3) ? "output switch" :
                                        "");

                        ev_type = GFX_SWITCH;
                        real_ev = __sony_nc_gfx_switch_status_get();
                        break;

                case 0x015B:
                        /* Hybrid GFX switching SVS151290S */
                        ev_type = GFX_SWITCH;
                        real_ev = __sony_nc_gfx_switch_status_get();
                        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 0x0128:
                case 0x0146:
                case 0x015B:
                        result = sony_nc_gfx_switch_setup(pf_device, handle);
                        if (result)
                                pr_err("couldn't set up GFX Switch status (%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:
                case 0x014b:
                case 0x014c:
                case 0x0163:
                        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 0x0128:
                case 0x0146:
                case 0x015B:
                        sony_nc_gfx_switch_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:
                case 0x014b:
                case 0x014c:
                case 0x0163:
                        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:
                case 0x014b:
                case 0x014c:
                case 0x0163:
                        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 |= 0x070000;

        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--; 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;
        }
}

/* GFX Switch position */
enum gfx_switch {
        SPEED,
        STAMINA,
        AUTO
};
struct snc_gfx_switch_control {
        struct device_attribute attr;
        unsigned int handle;
};
static struct snc_gfx_switch_control *gfxs_ctl;

/* returns 0 for speed, 1 for stamina */
static int __sony_nc_gfx_switch_status_get(void)
{
        unsigned int result;

        if (sony_call_snc_handle(gfxs_ctl->handle,
                                gfxs_ctl->handle == 0x015B ? 0x0000 : 0x0100,
                                &result))
                return -EIO;

        switch (gfxs_ctl->handle) {
        case 0x0146:
                /* 1: discrete GFX (speed)
                 * 0: integrated GFX (stamina)
                 */
                return result & 0x1 ? SPEED : STAMINA;
                break;
        case 0x015B:
                /* 0: discrete GFX (speed)
                 * 1: integrated GFX (stamina)
                 */
                return result & 0x1 ? STAMINA : SPEED;
                break;
        case 0x0128:
                /* it's a more elaborated bitmask, for now:
                 * 2: integrated GFX (stamina)
                 * 0: discrete GFX (speed)
                 */
                dprintk("GFX Status: 0x%x\n", result);
                return result & 0x80 ? AUTO :
                        result & 0x02 ? STAMINA : SPEED;
                break;
        }
        return -EINVAL;
}

static ssize_t sony_nc_gfx_switch_status_show(struct device *dev,
                                       struct device_attribute *attr,
                                       char *buffer)
{
        int pos = __sony_nc_gfx_switch_status_get();

        if (pos < 0)
                return pos;

        return snprintf(buffer, PAGE_SIZE, "%s\n",
                                        pos == SPEED ? "speed" :
                                        pos == STAMINA ? "stamina" :
                                        pos == AUTO ? "auto" : "unknown");
}

static int sony_nc_gfx_switch_setup(struct platform_device *pd,
                unsigned int handle)
{
        unsigned int result;

        gfxs_ctl = kzalloc(sizeof(struct snc_gfx_switch_control), GFP_KERNEL);
        if (!gfxs_ctl)
                return -ENOMEM;

        gfxs_ctl->handle = handle;

        sysfs_attr_init(&gfxs_ctl->attr.attr);
        gfxs_ctl->attr.attr.name = "gfx_switch_status";
        gfxs_ctl->attr.attr.mode = S_IRUGO;
        gfxs_ctl->attr.show = sony_nc_gfx_switch_status_show;

        result = device_create_file(&pd->dev, &gfxs_ctl->attr);
        if (result)
                goto gfxerror;

        return 0;

gfxerror:
        kfree(gfxs_ctl);
        gfxs_ctl = NULL;

        return result;
}

static void sony_nc_gfx_switch_cleanup(struct platform_device *pd)
{
        if (gfxs_ctl) {
                device_remove_file(&pd->dev, &gfxs_ctl->attr);

                kfree(gfxs_ctl);
                gfxs_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:
        case 0x14b:
        case 0x14c:
                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 (sony_find_snc_handle(0x14b) >= 0) {
                ops = &sony_backlight_ng_ops;
                sony_bl_props.cmd_base = 0x3000;
                sony_nc_backlight_ng_read_limits(0x14b, &sony_bl_props);
                max_brightness = sony_bl_props.maxlvl - sony_bl_props.offset;

        } else if (sony_find_snc_handle(0x14c) >= 0) {
                ops = &sony_backlight_ng_ops;
                sony_bl_props.cmd_base = 0x3000;
                sony_nc_backlight_ng_read_limits(0x14c, &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)
{
        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_inode(file);
                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");