// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  toshiba_acpi.c - Toshiba Laptop ACPI Extras
 *
 *  Copyright (C) 2002-2004 John Belmonte
 *  Copyright (C) 2008 Philip Langdale
 *  Copyright (C) 2010 Pierre Ducroquet
 *  Copyright (C) 2014-2016 Azael Avalos
 *
 *  The devolpment page for this driver is located at
 *  http://memebeam.org/toys/ToshibaAcpiDriver.
 *
 *  Credits:
 *      Jonathan A. Buzzard - Toshiba HCI info, and critical tips on reverse
 *              engineering the Windows drivers
 *      Yasushi Nagato - changes for linux kernel 2.4 -> 2.5
 *      Rob Miller - TV out and hotkeys help
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#define TOSHIBA_ACPI_VERSION    "0.24"
#define PROC_INTERFACE_VERSION  1

#include <linux/compiler.h>
#include <linux/dmi.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/backlight.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <linux/leds.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/i8042.h>
#include <linux/acpi.h>
#include <linux/uaccess.h>
#include <linux/miscdevice.h>
#include <linux/rfkill.h>
#include <linux/hwmon.h>
#include <linux/iio/iio.h>
#include <linux/platform_device.h>
#include <linux/toshiba.h>
#include <acpi/battery.h>
#include <acpi/video.h>

MODULE_AUTHOR("John Belmonte");
MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver");
MODULE_LICENSE("GPL");

static int turn_on_panel_on_resume = -1;
module_param(turn_on_panel_on_resume, int, 0644);
MODULE_PARM_DESC(turn_on_panel_on_resume,
        "Call HCI_PANEL_POWER_ON on resume (-1 = auto, 0 = no, 1 = yes");

static int hci_hotkey_quickstart = -1;
module_param(hci_hotkey_quickstart, int, 0644);
MODULE_PARM_DESC(hci_hotkey_quickstart,
                 "Call HCI_HOTKEY_EVENT with value 0x5 for quickstart button support (-1 = auto, 0 = no, 1 = yes");

#define TOSHIBA_WMI_EVENT_GUID "59142400-C6A3-40FA-BADB-8A2652834100"

/* Scan code for Fn key on TOS1900 models */
#define TOS1900_FN_SCAN         0x6e

/* Toshiba ACPI method paths */
#define METHOD_VIDEO_OUT        "\\_SB_.VALX.DSSX"

/*
 * The Toshiba configuration interface is composed of the HCI and the SCI,
 * which are defined as follows:
 *
 * HCI is Toshiba's "Hardware Control Interface" which is supposed to
 * be uniform across all their models.  Ideally we would just call
 * dedicated ACPI methods instead of using this primitive interface.
 * However the ACPI methods seem to be incomplete in some areas (for
 * example they allow setting, but not reading, the LCD brightness value),
 * so this is still useful.
 *
 * SCI stands for "System Configuration Interface" which aim is to
 * conceal differences in hardware between different models.
 */

#define TCI_WORDS                       6

/* Operations */
#define HCI_SET                         0xff00
#define HCI_GET                         0xfe00
#define SCI_OPEN                        0xf100
#define SCI_CLOSE                       0xf200
#define SCI_GET                         0xf300
#define SCI_SET                         0xf400

/* Return codes */
#define TOS_SUCCESS                     0x0000
#define TOS_SUCCESS2                    0x0001
#define TOS_OPEN_CLOSE_OK               0x0044
#define TOS_FAILURE                     0x1000
#define TOS_NOT_SUPPORTED               0x8000
#define TOS_ALREADY_OPEN                0x8100
#define TOS_NOT_OPENED                  0x8200
#define TOS_INPUT_DATA_ERROR            0x8300
#define TOS_WRITE_PROTECTED             0x8400
#define TOS_NOT_PRESENT                 0x8600
#define TOS_FIFO_EMPTY                  0x8c00
#define TOS_DATA_NOT_AVAILABLE          0x8d20
#define TOS_NOT_INITIALIZED             0x8d50
#define TOS_NOT_INSTALLED               0x8e00

/* Registers */
#define HCI_PANEL_POWER_ON              0x0002
#define HCI_FAN                         0x0004
#define HCI_TR_BACKLIGHT                0x0005
#define HCI_SYSTEM_EVENT                0x0016
#define HCI_VIDEO_OUT                   0x001c
#define HCI_HOTKEY_EVENT                0x001e
#define HCI_LCD_BRIGHTNESS              0x002a
#define HCI_FAN_RPM                     0x0045
#define HCI_WIRELESS                    0x0056
#define HCI_ACCELEROMETER               0x006d
#define HCI_COOLING_METHOD              0x007f
#define HCI_KBD_ILLUMINATION            0x0095
#define HCI_ECO_MODE                    0x0097
#define HCI_ACCELEROMETER2              0x00a6
#define HCI_BATTERY_CHARGE_MODE         0x00ba
#define HCI_SYSTEM_INFO                 0xc000
#define SCI_PANEL_POWER_ON              0x010d
#define SCI_ILLUMINATION                0x014e
#define SCI_USB_SLEEP_CHARGE            0x0150
#define SCI_KBD_ILLUM_STATUS            0x015c
#define SCI_USB_SLEEP_MUSIC             0x015e
#define SCI_USB_THREE                   0x0169
#define SCI_TOUCHPAD                    0x050e
#define SCI_KBD_FUNCTION_KEYS           0x0522

/* Field definitions */
#define HCI_ACCEL_MASK                  0x7fff
#define HCI_ACCEL_DIRECTION_MASK        0x8000
#define HCI_HOTKEY_DISABLE              0x0b
#define HCI_HOTKEY_ENABLE_QUICKSTART    0x05
#define HCI_HOTKEY_ENABLE               0x09
#define HCI_HOTKEY_SPECIAL_FUNCTIONS    0x10
#define HCI_LCD_BRIGHTNESS_BITS         3
#define HCI_LCD_BRIGHTNESS_SHIFT        (16-HCI_LCD_BRIGHTNESS_BITS)
#define HCI_LCD_BRIGHTNESS_LEVELS       (1 << HCI_LCD_BRIGHTNESS_BITS)
#define HCI_MISC_SHIFT                  0x10
#define HCI_SYSTEM_TYPE1                0x10
#define HCI_SYSTEM_TYPE2                0x11
#define HCI_VIDEO_OUT_LCD               0x1
#define HCI_VIDEO_OUT_CRT               0x2
#define HCI_VIDEO_OUT_TV                0x4
#define SCI_KBD_MODE_MASK               0x1f
#define SCI_KBD_MODE_FNZ                0x1
#define SCI_KBD_MODE_AUTO               0x2
#define SCI_KBD_MODE_ON                 0x8
#define SCI_KBD_MODE_OFF                0x10
#define SCI_KBD_TIME_MAX                0x3c001a
#define HCI_WIRELESS_STATUS             0x1
#define HCI_WIRELESS_WWAN               0x3
#define HCI_WIRELESS_WWAN_STATUS        0x2000
#define HCI_WIRELESS_WWAN_POWER         0x4000
#define SCI_USB_CHARGE_MODE_MASK        0xff
#define SCI_USB_CHARGE_DISABLED         0x00
#define SCI_USB_CHARGE_ALTERNATE        0x09
#define SCI_USB_CHARGE_TYPICAL          0x11
#define SCI_USB_CHARGE_AUTO             0x21
#define SCI_USB_CHARGE_BAT_MASK         0x7
#define SCI_USB_CHARGE_BAT_LVL_OFF      0x1
#define SCI_USB_CHARGE_BAT_LVL_ON       0x4
#define SCI_USB_CHARGE_BAT_LVL          0x0200
#define SCI_USB_CHARGE_RAPID_DSP        0x0300

struct toshiba_acpi_dev {
        struct acpi_device *acpi_dev;
        const char *method_hci;
        struct input_dev *hotkey_dev;
        struct work_struct hotkey_work;
        struct backlight_device *backlight_dev;
        struct led_classdev led_dev;
        struct led_classdev kbd_led;
        struct led_classdev eco_led;
        struct miscdevice miscdev;
        struct rfkill *wwan_rfk;
        struct iio_dev *indio_dev;
#if IS_ENABLED(CONFIG_HWMON)
        struct device *hwmon_device;
#endif

        int force_fan;
        int last_key_event;
        int key_event_valid;
        int kbd_type;
        int kbd_mode;
        int kbd_time;
        int usbsc_bat_level;
        int usbsc_mode_base;
        int hotkey_event_type;
        int max_cooling_method;

        unsigned int illumination_supported:1;
        unsigned int video_supported:1;
        unsigned int fan_supported:1;
        unsigned int fan_rpm_supported:1;
        unsigned int system_event_supported:1;
        unsigned int ntfy_supported:1;
        unsigned int info_supported:1;
        unsigned int tr_backlight_supported:1;
        unsigned int kbd_illum_supported:1;
        unsigned int touchpad_supported:1;
        unsigned int eco_supported:1;
        unsigned int accelerometer_supported:1;
        unsigned int usb_sleep_charge_supported:1;
        unsigned int usb_rapid_charge_supported:1;
        unsigned int usb_sleep_music_supported:1;
        unsigned int kbd_function_keys_supported:1;
        unsigned int panel_power_on_supported:1;
        unsigned int usb_three_supported:1;
        unsigned int wwan_supported:1;
        unsigned int cooling_method_supported:1;
        unsigned int battery_charge_mode_supported:1;
        unsigned int sysfs_created:1;
        unsigned int notify_handler_installed:1;
        unsigned int special_functions;

        bool kbd_event_generated;
        bool killswitch;
};

static struct toshiba_acpi_dev *toshiba_acpi;

static bool disable_hotkeys;
module_param(disable_hotkeys, bool, 0444);
MODULE_PARM_DESC(disable_hotkeys, "Disables the hotkeys activation");

static const struct acpi_device_id toshiba_device_ids[] = {
        {"TOS6200", 0},
        {"TOS6207", 0},
        {"TOS6208", 0},
        {"TOS1900", 0},
        {"", 0},
};
MODULE_DEVICE_TABLE(acpi, toshiba_device_ids);

static const struct key_entry toshiba_acpi_keymap[] = {
        { KE_KEY, 0x9e, { KEY_RFKILL } },
        { KE_KEY, 0x101, { KEY_MUTE } },
        { KE_KEY, 0x102, { KEY_ZOOMOUT } },
        { KE_KEY, 0x103, { KEY_ZOOMIN } },
        { KE_KEY, 0x10f, { KEY_TAB } },
        { KE_KEY, 0x12c, { KEY_KBDILLUMTOGGLE } },
        { KE_KEY, 0x139, { KEY_ZOOMRESET } },
        { KE_KEY, 0x13b, { KEY_COFFEE } },
        { KE_KEY, 0x13c, { KEY_BATTERY } },
        { KE_KEY, 0x13d, { KEY_SLEEP } },
        { KE_KEY, 0x13e, { KEY_SUSPEND } },
        { KE_KEY, 0x13f, { KEY_SWITCHVIDEOMODE } },
        { KE_KEY, 0x140, { KEY_BRIGHTNESSDOWN } },
        { KE_KEY, 0x141, { KEY_BRIGHTNESSUP } },
        { KE_KEY, 0x142, { KEY_WLAN } },
        { KE_KEY, 0x143, { KEY_TOUCHPAD_TOGGLE } },
        { KE_KEY, 0x17f, { KEY_FN } },
        { KE_KEY, 0xb05, { KEY_PROG2 } },
        { KE_KEY, 0xb06, { KEY_WWW } },
        { KE_KEY, 0xb07, { KEY_MAIL } },
        { KE_KEY, 0xb30, { KEY_STOP } },
        { KE_KEY, 0xb31, { KEY_PREVIOUSSONG } },
        { KE_KEY, 0xb32, { KEY_NEXTSONG } },
        { KE_KEY, 0xb33, { KEY_PLAYPAUSE } },
        { KE_KEY, 0xb5a, { KEY_MEDIA } },
        { KE_IGNORE, 0x0e00, { KEY_RESERVED } }, /* Wake from sleep */
        { KE_IGNORE, 0x1430, { KEY_RESERVED } }, /* Wake from sleep */
        { KE_IGNORE, 0x1501, { KEY_RESERVED } }, /* Output changed */
        { KE_IGNORE, 0x1502, { KEY_RESERVED } }, /* HDMI plugged/unplugged */
        { KE_IGNORE, 0x1ABE, { KEY_RESERVED } }, /* Protection level set */
        { KE_IGNORE, 0x1ABF, { KEY_RESERVED } }, /* Protection level off */
        { KE_END, 0 },
};

static const struct key_entry toshiba_acpi_alt_keymap[] = {
        { KE_KEY, 0x102, { KEY_ZOOMOUT } },
        { KE_KEY, 0x103, { KEY_ZOOMIN } },
        { KE_KEY, 0x12c, { KEY_KBDILLUMTOGGLE } },
        { KE_KEY, 0x139, { KEY_ZOOMRESET } },
        { KE_KEY, 0x13c, { KEY_BRIGHTNESSDOWN } },
        { KE_KEY, 0x13d, { KEY_BRIGHTNESSUP } },
        { KE_KEY, 0x13e, { KEY_SWITCHVIDEOMODE } },
        { KE_KEY, 0x13f, { KEY_TOUCHPAD_TOGGLE } },
        { KE_KEY, 0x157, { KEY_MUTE } },
        { KE_KEY, 0x158, { KEY_WLAN } },
        { KE_END, 0 },
};

/*
 * Utility
 */

static inline void _set_bit(u32 *word, u32 mask, int value)
{
        *word = (*word & ~mask) | (mask * value);
}

/*
 * ACPI interface wrappers
 */

static int write_acpi_int(const char *methodName, int val)
{
        acpi_status status;

        status = acpi_execute_simple_method(NULL, (char *)methodName, val);
        return (status == AE_OK) ? 0 : -EIO;
}

/*
 * Perform a raw configuration call.  Here we don't care about input or output
 * buffer format.
 */
static acpi_status tci_raw(struct toshiba_acpi_dev *dev,
                           const u32 in[TCI_WORDS], u32 out[TCI_WORDS])
{
        union acpi_object in_objs[TCI_WORDS], out_objs[TCI_WORDS + 1];
        struct acpi_object_list params;
        struct acpi_buffer results;
        acpi_status status;
        int i;

        params.count = TCI_WORDS;
        params.pointer = in_objs;
        for (i = 0; i < TCI_WORDS; ++i) {
                in_objs[i].type = ACPI_TYPE_INTEGER;
                in_objs[i].integer.value = in[i];
        }

        results.length = sizeof(out_objs);
        results.pointer = out_objs;

        status = acpi_evaluate_object(dev->acpi_dev->handle,
                                      (char *)dev->method_hci, &params,
                                      &results);
        if ((status == AE_OK) && (out_objs->package.count <= TCI_WORDS)) {
                for (i = 0; i < out_objs->package.count; ++i)
                        out[i] = out_objs->package.elements[i].integer.value;
        }

        return status;
}

/*
 * Common hci tasks
 *
 * In addition to the ACPI status, the HCI system returns a result which
 * may be useful (such as "not supported").
 */

static u32 hci_write(struct toshiba_acpi_dev *dev, u32 reg, u32 in1)
{
        u32 in[TCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status = tci_raw(dev, in, out);

        return ACPI_SUCCESS(status) ? out[0] : TOS_FAILURE;
}

static u32 hci_read(struct toshiba_acpi_dev *dev, u32 reg, u32 *out1)
{
        u32 in[TCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status = tci_raw(dev, in, out);

        if (ACPI_FAILURE(status))
                return TOS_FAILURE;

        *out1 = out[2];

        return out[0];
}

/*
 * Common sci tasks
 */

static int sci_open(struct toshiba_acpi_dev *dev)
{
        u32 in[TCI_WORDS] = { SCI_OPEN, 0, 0, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status = tci_raw(dev, in, out);

        if  (ACPI_FAILURE(status)) {
                pr_err("ACPI call to open SCI failed\n");
                return 0;
        }

        if (out[0] == TOS_OPEN_CLOSE_OK) {
                return 1;
        } else if (out[0] == TOS_ALREADY_OPEN) {
                pr_info("Toshiba SCI already opened\n");
                return 1;
        } else if (out[0] == TOS_NOT_SUPPORTED) {
                /*
                 * Some BIOSes do not have the SCI open/close functions
                 * implemented and return 0x8000 (Not Supported), failing to
                 * register some supported features.
                 *
                 * Simply return 1 if we hit those affected laptops to make the
                 * supported features work.
                 *
                 * In the case that some laptops really do not support the SCI,
                 * all the SCI dependent functions check for TOS_NOT_SUPPORTED,
                 * and thus, not registering support for the queried feature.
                 */
                return 1;
        } else if (out[0] == TOS_NOT_PRESENT) {
                pr_info("Toshiba SCI is not present\n");
        }

        return 0;
}

static void sci_close(struct toshiba_acpi_dev *dev)
{
        u32 in[TCI_WORDS] = { SCI_CLOSE, 0, 0, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status = tci_raw(dev, in, out);

        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to close SCI failed\n");
                return;
        }

        if (out[0] == TOS_OPEN_CLOSE_OK)
                return;
        else if (out[0] == TOS_NOT_OPENED)
                pr_info("Toshiba SCI not opened\n");
        else if (out[0] == TOS_NOT_PRESENT)
                pr_info("Toshiba SCI is not present\n");
}

static u32 sci_read(struct toshiba_acpi_dev *dev, u32 reg, u32 *out1)
{
        u32 in[TCI_WORDS] = { SCI_GET, reg, 0, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status = tci_raw(dev, in, out);

        if (ACPI_FAILURE(status))
                return TOS_FAILURE;

        *out1 = out[2];

        return out[0];
}

static u32 sci_write(struct toshiba_acpi_dev *dev, u32 reg, u32 in1)
{
        u32 in[TCI_WORDS] = { SCI_SET, reg, in1, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status = tci_raw(dev, in, out);

        return ACPI_SUCCESS(status) ? out[0] : TOS_FAILURE;
}

/* Illumination support */
static void toshiba_illumination_available(struct toshiba_acpi_dev *dev)
{
        u32 in[TCI_WORDS] = { SCI_GET, SCI_ILLUMINATION, 0, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        dev->illumination_supported = 0;

        if (!sci_open(dev))
                return;

        status = tci_raw(dev, in, out);
        sci_close(dev);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to query Illumination support failed\n");
                return;
        }

        if (out[0] != TOS_SUCCESS)
                return;

        dev->illumination_supported = 1;
}

static void toshiba_illumination_set(struct led_classdev *cdev,
                                     enum led_brightness brightness)
{
        struct toshiba_acpi_dev *dev = container_of(cdev,
                        struct toshiba_acpi_dev, led_dev);
        u32 result;
        u32 state;

        /* First request : initialize communication. */
        if (!sci_open(dev))
                return;

        /* Switch the illumination on/off */
        state = brightness ? 1 : 0;
        result = sci_write(dev, SCI_ILLUMINATION, state);
        sci_close(dev);
        if (result == TOS_FAILURE)
                pr_err("ACPI call for illumination failed\n");
}

static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev)
{
        struct toshiba_acpi_dev *dev = container_of(cdev,
                        struct toshiba_acpi_dev, led_dev);
        u32 result;
        u32 state;

        /* First request : initialize communication. */
        if (!sci_open(dev))
                return LED_OFF;

        /* Check the illumination */
        result = sci_read(dev, SCI_ILLUMINATION, &state);
        sci_close(dev);
        if (result == TOS_FAILURE) {
                pr_err("ACPI call for illumination failed\n");
                return LED_OFF;
        } else if (result != TOS_SUCCESS) {
                return LED_OFF;
        }

        return state ? LED_FULL : LED_OFF;
}

/* KBD Illumination */
static void toshiba_kbd_illum_available(struct toshiba_acpi_dev *dev)
{
        u32 in[TCI_WORDS] = { SCI_GET, SCI_KBD_ILLUM_STATUS, 0, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        dev->kbd_illum_supported = 0;
        dev->kbd_event_generated = false;

        if (!sci_open(dev))
                return;

        status = tci_raw(dev, in, out);
        sci_close(dev);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to query kbd illumination support failed\n");
                return;
        }

        if (out[0] != TOS_SUCCESS)
                return;

        /*
         * Check for keyboard backlight timeout max value,
         * previous kbd backlight implementation set this to
         * 0x3c0003, and now the new implementation set this
         * to 0x3c001a, use this to distinguish between them.
         */
        if (out[3] == SCI_KBD_TIME_MAX)
                dev->kbd_type = 2;
        else
                dev->kbd_type = 1;
        /* Get the current keyboard backlight mode */
        dev->kbd_mode = out[2] & SCI_KBD_MODE_MASK;
        /* Get the current time (1-60 seconds) */
        dev->kbd_time = out[2] >> HCI_MISC_SHIFT;
        /* Flag as supported */
        dev->kbd_illum_supported = 1;
}

static int toshiba_kbd_illum_status_set(struct toshiba_acpi_dev *dev, u32 time)
{
        u32 result;

        if (!sci_open(dev))
                return -EIO;

        result = sci_write(dev, SCI_KBD_ILLUM_STATUS, time);
        sci_close(dev);
        if (result == TOS_FAILURE)
                pr_err("ACPI call to set KBD backlight status failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return result == TOS_SUCCESS ? 0 : -EIO;
}

static int toshiba_kbd_illum_status_get(struct toshiba_acpi_dev *dev, u32 *time)
{
        u32 result;

        if (!sci_open(dev))
                return -EIO;

        result = sci_read(dev, SCI_KBD_ILLUM_STATUS, time);
        sci_close(dev);
        if (result == TOS_FAILURE)
                pr_err("ACPI call to get KBD backlight status failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return result == TOS_SUCCESS ? 0 : -EIO;
}

static enum led_brightness toshiba_kbd_backlight_get(struct led_classdev *cdev)
{
        struct toshiba_acpi_dev *dev = container_of(cdev,
                        struct toshiba_acpi_dev, kbd_led);
        u32 result;
        u32 state;

        /* Check the keyboard backlight state */
        result = hci_read(dev, HCI_KBD_ILLUMINATION, &state);
        if (result == TOS_FAILURE) {
                pr_err("ACPI call to get the keyboard backlight failed\n");
                return LED_OFF;
        } else if (result != TOS_SUCCESS) {
                return LED_OFF;
        }

        return state ? LED_FULL : LED_OFF;
}

static void toshiba_kbd_backlight_set(struct led_classdev *cdev,
                                     enum led_brightness brightness)
{
        struct toshiba_acpi_dev *dev = container_of(cdev,
                        struct toshiba_acpi_dev, kbd_led);
        u32 result;
        u32 state;

        /* Set the keyboard backlight state */
        state = brightness ? 1 : 0;
        result = hci_write(dev, HCI_KBD_ILLUMINATION, state);
        if (result == TOS_FAILURE)
                pr_err("ACPI call to set KBD Illumination mode failed\n");
}

/* TouchPad support */
static int toshiba_touchpad_set(struct toshiba_acpi_dev *dev, u32 state)
{
        u32 result;

        if (!sci_open(dev))
                return -EIO;

        result = sci_write(dev, SCI_TOUCHPAD, state);
        sci_close(dev);
        if (result == TOS_FAILURE)
                pr_err("ACPI call to set the touchpad failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return result == TOS_SUCCESS ? 0 : -EIO;
}

static int toshiba_touchpad_get(struct toshiba_acpi_dev *dev, u32 *state)
{
        u32 result;

        if (!sci_open(dev))
                return -EIO;

        result = sci_read(dev, SCI_TOUCHPAD, state);
        sci_close(dev);
        if (result == TOS_FAILURE)
                pr_err("ACPI call to query the touchpad failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return result == TOS_SUCCESS ? 0 : -EIO;
}

/* Eco Mode support */
static void toshiba_eco_mode_available(struct toshiba_acpi_dev *dev)
{
        u32 in[TCI_WORDS] = { HCI_GET, HCI_ECO_MODE, 0, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        dev->eco_supported = 0;

        status = tci_raw(dev, in, out);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to get ECO led failed\n");
                return;
        }

        if (out[0] == TOS_INPUT_DATA_ERROR || out[0] == TOS_NOT_SUPPORTED) {
                /*
                 * If we receive 0x8300 (Input Data Error), it means that the
                 * LED device is present, but that we just screwed the input
                 * parameters.
                 *
                 * On some laptops 0x8000 (Not supported) is also returned in
                 * this case, so we need to allow for that as well.
                 *
                 * Let's query the status of the LED to see if we really have a
                 * success response, indicating the actual presense of the LED,
                 * bail out otherwise.
                 */
                in[3] = 1;
                status = tci_raw(dev, in, out);
                if (ACPI_FAILURE(status)) {
                        pr_err("ACPI call to get ECO led failed\n");
                        return;
                }

                if (out[0] != TOS_SUCCESS)
                        return;

                dev->eco_supported = 1;
        }
}

static enum led_brightness
toshiba_eco_mode_get_status(struct led_classdev *cdev)
{
        struct toshiba_acpi_dev *dev = container_of(cdev,
                        struct toshiba_acpi_dev, eco_led);
        u32 in[TCI_WORDS] = { HCI_GET, HCI_ECO_MODE, 0, 1, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        status = tci_raw(dev, in, out);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to get ECO led failed\n");
                return LED_OFF;
        }

        if (out[0] != TOS_SUCCESS)
                return LED_OFF;

        return out[2] ? LED_FULL : LED_OFF;
}

static void toshiba_eco_mode_set_status(struct led_classdev *cdev,
                                     enum led_brightness brightness)
{
        struct toshiba_acpi_dev *dev = container_of(cdev,
                        struct toshiba_acpi_dev, eco_led);
        u32 in[TCI_WORDS] = { HCI_SET, HCI_ECO_MODE, 0, 1, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        /* Switch the Eco Mode led on/off */
        in[2] = (brightness) ? 1 : 0;
        status = tci_raw(dev, in, out);
        if (ACPI_FAILURE(status))
                pr_err("ACPI call to set ECO led failed\n");
}

/* Accelerometer support */
static void toshiba_accelerometer_available(struct toshiba_acpi_dev *dev)
{
        u32 in[TCI_WORDS] = { HCI_GET, HCI_ACCELEROMETER2, 0, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        dev->accelerometer_supported = 0;

        /*
         * Check if the accelerometer call exists,
         * this call also serves as initialization
         */
        status = tci_raw(dev, in, out);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to query the accelerometer failed\n");
                return;
        }

        if (out[0] != TOS_SUCCESS)
                return;

        dev->accelerometer_supported = 1;
}

static int toshiba_accelerometer_get(struct toshiba_acpi_dev *dev,
                                     u32 *xy, u32 *z)
{
        u32 in[TCI_WORDS] = { HCI_GET, HCI_ACCELEROMETER, 0, 1, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        /* Check the Accelerometer status */
        status = tci_raw(dev, in, out);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to query the accelerometer failed\n");
                return -EIO;
        }

        if (out[0] == TOS_NOT_SUPPORTED)
                return -ENODEV;

        if (out[0] != TOS_SUCCESS)
                return -EIO;

        *xy = out[2];
        *z = out[4];

        return 0;
}

/* Sleep (Charge and Music) utilities support */
static void toshiba_usb_sleep_charge_available(struct toshiba_acpi_dev *dev)
{
        u32 in[TCI_WORDS] = { SCI_GET, SCI_USB_SLEEP_CHARGE, 0, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        dev->usb_sleep_charge_supported = 0;

        if (!sci_open(dev))
                return;

        status = tci_raw(dev, in, out);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to get USB Sleep and Charge mode failed\n");
                sci_close(dev);
                return;
        }

        if (out[0] != TOS_SUCCESS) {
                sci_close(dev);
                return;
        }

        dev->usbsc_mode_base = out[4];

        in[5] = SCI_USB_CHARGE_BAT_LVL;
        status = tci_raw(dev, in, out);
        sci_close(dev);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to get USB Sleep and Charge mode failed\n");
                return;
        }

        if (out[0] != TOS_SUCCESS)
                return;

        dev->usbsc_bat_level = out[2];
        /* Flag as supported */
        dev->usb_sleep_charge_supported = 1;
}

static int toshiba_usb_sleep_charge_get(struct toshiba_acpi_dev *dev,
                                        u32 *mode)
{
        u32 result;

        if (!sci_open(dev))
                return -EIO;

        result = sci_read(dev, SCI_USB_SLEEP_CHARGE, mode);
        sci_close(dev);
        if (result == TOS_FAILURE)
                pr_err("ACPI call to set USB S&C mode failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return result == TOS_SUCCESS ? 0 : -EIO;
}

static int toshiba_usb_sleep_charge_set(struct toshiba_acpi_dev *dev,
                                        u32 mode)
{
        u32 result;

        if (!sci_open(dev))
                return -EIO;

        result = sci_write(dev, SCI_USB_SLEEP_CHARGE, mode);
        sci_close(dev);
        if (result == TOS_FAILURE)
                pr_err("ACPI call to set USB S&C mode failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return result == TOS_SUCCESS ? 0 : -EIO;
}

static int toshiba_sleep_functions_status_get(struct toshiba_acpi_dev *dev,
                                              u32 *mode)
{
        u32 in[TCI_WORDS] = { SCI_GET, SCI_USB_SLEEP_CHARGE, 0, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        if (!sci_open(dev))
                return -EIO;

        in[5] = SCI_USB_CHARGE_BAT_LVL;
        status = tci_raw(dev, in, out);
        sci_close(dev);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to get USB S&C battery level failed\n");
                return -EIO;
        }

        if (out[0] == TOS_NOT_SUPPORTED)
                return -ENODEV;

        if (out[0] != TOS_SUCCESS)
                return -EIO;

        *mode = out[2];

        return 0;

}

static int toshiba_sleep_functions_status_set(struct toshiba_acpi_dev *dev,
                                              u32 mode)
{
        u32 in[TCI_WORDS] = { SCI_SET, SCI_USB_SLEEP_CHARGE, 0, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        if (!sci_open(dev))
                return -EIO;

        in[2] = mode;
        in[5] = SCI_USB_CHARGE_BAT_LVL;
        status = tci_raw(dev, in, out);
        sci_close(dev);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to set USB S&C battery level failed\n");
                return -EIO;
        }

        if (out[0] == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return out[0] == TOS_SUCCESS ? 0 : -EIO;
}

static int toshiba_usb_rapid_charge_get(struct toshiba_acpi_dev *dev,
                                        u32 *state)
{
        u32 in[TCI_WORDS] = { SCI_GET, SCI_USB_SLEEP_CHARGE, 0, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        if (!sci_open(dev))
                return -EIO;

        in[5] = SCI_USB_CHARGE_RAPID_DSP;
        status = tci_raw(dev, in, out);
        sci_close(dev);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to get USB Rapid Charge failed\n");
                return -EIO;
        }

        if (out[0] == TOS_NOT_SUPPORTED)
                return -ENODEV;

        if (out[0] != TOS_SUCCESS && out[0] != TOS_SUCCESS2)
                return -EIO;

        *state = out[2];

        return 0;
}

static int toshiba_usb_rapid_charge_set(struct toshiba_acpi_dev *dev,
                                        u32 state)
{
        u32 in[TCI_WORDS] = { SCI_SET, SCI_USB_SLEEP_CHARGE, 0, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        if (!sci_open(dev))
                return -EIO;

        in[2] = state;
        in[5] = SCI_USB_CHARGE_RAPID_DSP;
        status = tci_raw(dev, in, out);
        sci_close(dev);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to set USB Rapid Charge failed\n");
                return -EIO;
        }

        if (out[0] == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return (out[0] == TOS_SUCCESS || out[0] == TOS_SUCCESS2) ? 0 : -EIO;
}

static int toshiba_usb_sleep_music_get(struct toshiba_acpi_dev *dev, u32 *state)
{
        u32 result;

        if (!sci_open(dev))
                return -EIO;

        result = sci_read(dev, SCI_USB_SLEEP_MUSIC, state);
        sci_close(dev);
        if (result == TOS_FAILURE)
                pr_err("ACPI call to get Sleep and Music failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return result == TOS_SUCCESS ? 0 : -EIO;
}

static int toshiba_usb_sleep_music_set(struct toshiba_acpi_dev *dev, u32 state)
{
        u32 result;

        if (!sci_open(dev))
                return -EIO;

        result = sci_write(dev, SCI_USB_SLEEP_MUSIC, state);
        sci_close(dev);
        if (result == TOS_FAILURE)
                pr_err("ACPI call to set Sleep and Music failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return result == TOS_SUCCESS ? 0 : -EIO;
}

/* Keyboard function keys */
static int toshiba_function_keys_get(struct toshiba_acpi_dev *dev, u32 *mode)
{
        u32 result;

        if (!sci_open(dev))
                return -EIO;

        result = sci_read(dev, SCI_KBD_FUNCTION_KEYS, mode);
        sci_close(dev);
        if (result == TOS_FAILURE)
                pr_err("ACPI call to get KBD function keys failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return (result == TOS_SUCCESS || result == TOS_SUCCESS2) ? 0 : -EIO;
}

static int toshiba_function_keys_set(struct toshiba_acpi_dev *dev, u32 mode)
{
        u32 result;

        if (!sci_open(dev))
                return -EIO;

        result = sci_write(dev, SCI_KBD_FUNCTION_KEYS, mode);
        sci_close(dev);
        if (result == TOS_FAILURE)
                pr_err("ACPI call to set KBD function keys failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return (result == TOS_SUCCESS || result == TOS_SUCCESS2) ? 0 : -EIO;
}

/* Panel Power ON */
static int toshiba_panel_power_on_get(struct toshiba_acpi_dev *dev, u32 *state)
{
        u32 result;

        if (!sci_open(dev))
                return -EIO;

        result = sci_read(dev, SCI_PANEL_POWER_ON, state);
        sci_close(dev);
        if (result == TOS_FAILURE)
                pr_err("ACPI call to get Panel Power ON failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return result == TOS_SUCCESS ? 0 : -EIO;
}

static int toshiba_panel_power_on_set(struct toshiba_acpi_dev *dev, u32 state)
{
        u32 result;

        if (!sci_open(dev))
                return -EIO;

        result = sci_write(dev, SCI_PANEL_POWER_ON, state);
        sci_close(dev);
        if (result == TOS_FAILURE)
                pr_err("ACPI call to set Panel Power ON failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return result == TOS_SUCCESS ? 0 : -EIO;
}

/* USB Three */
static int toshiba_usb_three_get(struct toshiba_acpi_dev *dev, u32 *state)
{
        u32 result;

        if (!sci_open(dev))
                return -EIO;

        result = sci_read(dev, SCI_USB_THREE, state);
        sci_close(dev);
        if (result == TOS_FAILURE)
                pr_err("ACPI call to get USB 3 failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return (result == TOS_SUCCESS || result == TOS_SUCCESS2) ? 0 : -EIO;
}

static int toshiba_usb_three_set(struct toshiba_acpi_dev *dev, u32 state)
{
        u32 result;

        if (!sci_open(dev))
                return -EIO;

        result = sci_write(dev, SCI_USB_THREE, state);
        sci_close(dev);
        if (result == TOS_FAILURE)
                pr_err("ACPI call to set USB 3 failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return (result == TOS_SUCCESS || result == TOS_SUCCESS2) ? 0 : -EIO;
}

/* Hotkey Event type */
static int toshiba_hotkey_event_type_get(struct toshiba_acpi_dev *dev,
                                         u32 *type)
{
        u32 in[TCI_WORDS] = { HCI_GET, HCI_SYSTEM_INFO, 0x03, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        status = tci_raw(dev, in, out);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to get System type failed\n");
                return -EIO;
        }

        if (out[0] == TOS_NOT_SUPPORTED)
                return -ENODEV;

        if (out[0] != TOS_SUCCESS)
                return -EIO;

        *type = out[3];

        return 0;
}

/* Wireless status (RFKill, WLAN, BT, WWAN) */
static int toshiba_wireless_status(struct toshiba_acpi_dev *dev)
{
        u32 in[TCI_WORDS] = { HCI_GET, HCI_WIRELESS, 0, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        in[3] = HCI_WIRELESS_STATUS;
        status = tci_raw(dev, in, out);

        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to get Wireless status failed\n");
                return -EIO;
        }

        if (out[0] == TOS_NOT_SUPPORTED)
                return -ENODEV;

        if (out[0] != TOS_SUCCESS)
                return -EIO;

        dev->killswitch = !!(out[2] & HCI_WIRELESS_STATUS);

        return 0;
}

/* WWAN */
static void toshiba_wwan_available(struct toshiba_acpi_dev *dev)
{
        u32 in[TCI_WORDS] = { HCI_GET, HCI_WIRELESS, 0, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        dev->wwan_supported = 0;

        /*
         * WWAN support can be queried by setting the in[3] value to
         * HCI_WIRELESS_WWAN (0x03).
         *
         * If supported, out[0] contains TOS_SUCCESS and out[2] contains
         * HCI_WIRELESS_WWAN_STATUS (0x2000).
         *
         * If not supported, out[0] contains TOS_INPUT_DATA_ERROR (0x8300)
         * or TOS_NOT_SUPPORTED (0x8000).
         */
        in[3] = HCI_WIRELESS_WWAN;
        status = tci_raw(dev, in, out);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to get WWAN status failed\n");
                return;
        }

        if (out[0] != TOS_SUCCESS)
                return;

        dev->wwan_supported = (out[2] == HCI_WIRELESS_WWAN_STATUS);
}

static int toshiba_wwan_set(struct toshiba_acpi_dev *dev, u32 state)
{
        u32 in[TCI_WORDS] = { HCI_SET, HCI_WIRELESS, state, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        in[3] = HCI_WIRELESS_WWAN_STATUS;
        status = tci_raw(dev, in, out);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to set WWAN status failed\n");
                return -EIO;
        }

        if (out[0] == TOS_NOT_SUPPORTED)
                return -ENODEV;

        if (out[0] != TOS_SUCCESS)
                return -EIO;

        /*
         * Some devices only need to call HCI_WIRELESS_WWAN_STATUS to
         * (de)activate the device, but some others need the
         * HCI_WIRELESS_WWAN_POWER call as well.
         */
        in[3] = HCI_WIRELESS_WWAN_POWER;
        status = tci_raw(dev, in, out);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to set WWAN power failed\n");
                return -EIO;
        }

        if (out[0] == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return out[0] == TOS_SUCCESS ? 0 : -EIO;
}

/* Cooling Method */
static void toshiba_cooling_method_available(struct toshiba_acpi_dev *dev)
{
        u32 in[TCI_WORDS] = { HCI_GET, HCI_COOLING_METHOD, 0, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        dev->cooling_method_supported = 0;
        dev->max_cooling_method = 0;

        status = tci_raw(dev, in, out);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to get Cooling Method failed\n");
                return;
        }

        if (out[0] != TOS_SUCCESS && out[0] != TOS_SUCCESS2)
                return;

        dev->cooling_method_supported = 1;
        dev->max_cooling_method = out[3];
}

static int toshiba_cooling_method_get(struct toshiba_acpi_dev *dev, u32 *state)
{
        u32 result = hci_read(dev, HCI_COOLING_METHOD, state);

        if (result == TOS_FAILURE)
                pr_err("ACPI call to get Cooling Method failed\n");

        if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return (result == TOS_SUCCESS || result == TOS_SUCCESS2) ? 0 : -EIO;
}

static int toshiba_cooling_method_set(struct toshiba_acpi_dev *dev, u32 state)
{
        u32 result = hci_write(dev, HCI_COOLING_METHOD, state);

        if (result == TOS_FAILURE)
                pr_err("ACPI call to set Cooling Method failed\n");

        if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return (result == TOS_SUCCESS || result == TOS_SUCCESS2) ? 0 : -EIO;
}

/* Battery charge control */
static void toshiba_battery_charge_mode_available(struct toshiba_acpi_dev *dev)
{
        u32 in[TCI_WORDS] = { HCI_GET, HCI_BATTERY_CHARGE_MODE, 0, 0, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status;

        dev->battery_charge_mode_supported = 0;

        status = tci_raw(dev, in, out);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to get Battery Charge Mode failed\n");
                return;
        }

        if (out[0] != TOS_SUCCESS && out[0] != TOS_SUCCESS2)
                return;

        dev->battery_charge_mode_supported = 1;
}

static int toshiba_battery_charge_mode_get(struct toshiba_acpi_dev *dev, u32 *state)
{
        u32 in[TCI_WORDS] = { HCI_GET, HCI_BATTERY_CHARGE_MODE, 0, 0, 0, 0x1 };
        u32 out[TCI_WORDS];
        int retries = 3;

        do {
                acpi_status status = tci_raw(dev, in, out);

                if (ACPI_FAILURE(status))
                        pr_err("ACPI call to get Battery Charge Mode failed\n");
                switch (out[0]) {
                case TOS_SUCCESS:
                case TOS_SUCCESS2:
                        *state = out[2];
                        return 0;
                case TOS_NOT_SUPPORTED:
                        return -ENODEV;
                case TOS_DATA_NOT_AVAILABLE:
                        retries--;
                        break;
                default:
                        return -EIO;
                }
        } while (retries);

        return -EIO;
}

static int toshiba_battery_charge_mode_set(struct toshiba_acpi_dev *dev, u32 state)
{
        u32 result = hci_write(dev, HCI_BATTERY_CHARGE_MODE, state);

        if (result == TOS_FAILURE)
                pr_err("ACPI call to set Battery Charge Mode failed\n");

        if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return (result == TOS_SUCCESS || result == TOS_SUCCESS2) ? 0 : -EIO;
}

/* Transflective Backlight */
static int get_tr_backlight_status(struct toshiba_acpi_dev *dev, u32 *status)
{
        u32 result = hci_read(dev, HCI_TR_BACKLIGHT, status);

        if (result == TOS_FAILURE)
                pr_err("ACPI call to get Transflective Backlight failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return result == TOS_SUCCESS ? 0 : -EIO;
}

static int set_tr_backlight_status(struct toshiba_acpi_dev *dev, u32 status)
{
        u32 result = hci_write(dev, HCI_TR_BACKLIGHT, !status);

        if (result == TOS_FAILURE)
                pr_err("ACPI call to set Transflective Backlight failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return result == TOS_SUCCESS ? 0 : -EIO;
}

static struct proc_dir_entry *toshiba_proc_dir;

/* LCD Brightness */
static int __get_lcd_brightness(struct toshiba_acpi_dev *dev)
{
        int brightness = 0;
        u32 result;
        u32 value;

        if (dev->tr_backlight_supported) {
                int ret = get_tr_backlight_status(dev, &value);

                if (ret)
                        return ret;
                if (value)
                        return 0;
                brightness++;
        }

        result = hci_read(dev, HCI_LCD_BRIGHTNESS, &value);
        if (result == TOS_FAILURE)
                pr_err("ACPI call to get LCD Brightness failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return result == TOS_SUCCESS ?
                        brightness + (value >> HCI_LCD_BRIGHTNESS_SHIFT) :
                        -EIO;
}

static int get_lcd_brightness(struct backlight_device *bd)
{
        struct toshiba_acpi_dev *dev = bl_get_data(bd);

        return __get_lcd_brightness(dev);
}

static int lcd_proc_show(struct seq_file *m, void *v)
{
        struct toshiba_acpi_dev *dev = m->private;
        int levels;
        int value;

        if (!dev->backlight_dev)
                return -ENODEV;

        levels = dev->backlight_dev->props.max_brightness + 1;
        value = get_lcd_brightness(dev->backlight_dev);
        if (value < 0) {
                pr_err("Error reading LCD brightness\n");
                return value;
        }

        seq_printf(m, "brightness:              %d\n", value);
        seq_printf(m, "brightness_levels:       %d\n", levels);

        return 0;
}

static int lcd_proc_open(struct inode *inode, struct file *file)
{
        return single_open(file, lcd_proc_show, pde_data(inode));
}

static int set_lcd_brightness(struct toshiba_acpi_dev *dev, int value)
{
        u32 result;

        if (dev->tr_backlight_supported) {
                int ret = set_tr_backlight_status(dev, !value);

                if (ret)
                        return ret;
                if (value)
                        value--;
        }

        value = value << HCI_LCD_BRIGHTNESS_SHIFT;
        result = hci_write(dev, HCI_LCD_BRIGHTNESS, value);
        if (result == TOS_FAILURE)
                pr_err("ACPI call to set LCD Brightness failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return result == TOS_SUCCESS ? 0 : -EIO;
}

static int set_lcd_status(struct backlight_device *bd)
{
        struct toshiba_acpi_dev *dev = bl_get_data(bd);

        return set_lcd_brightness(dev, bd->props.brightness);
}

static ssize_t lcd_proc_write(struct file *file, const char __user *buf,
                              size_t count, loff_t *pos)
{
        struct toshiba_acpi_dev *dev = pde_data(file_inode(file));
        char cmd[42];
        size_t len;
        int levels;
        int value;

        len = min(count, sizeof(cmd) - 1);
        if (copy_from_user(cmd, buf, len))
                return -EFAULT;
        cmd[len] = '\0';

        levels = dev->backlight_dev->props.max_brightness + 1;
        if (sscanf(cmd, " brightness : %i", &value) != 1 &&
            value < 0 && value > levels)
                return -EINVAL;

        if (set_lcd_brightness(dev, value))
                return -EIO;

        return count;
}

static const struct proc_ops lcd_proc_ops = {
        .proc_open      = lcd_proc_open,
        .proc_read      = seq_read,
        .proc_lseek     = seq_lseek,
        .proc_release   = single_release,
        .proc_write     = lcd_proc_write,
};

/* Video-Out */
static int get_video_status(struct toshiba_acpi_dev *dev, u32 *status)
{
        u32 result = hci_read(dev, HCI_VIDEO_OUT, status);

        if (result == TOS_FAILURE)
                pr_err("ACPI call to get Video-Out failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return result == TOS_SUCCESS ? 0 : -EIO;
}

static int video_proc_show(struct seq_file *m, void *v)
{
        struct toshiba_acpi_dev *dev = m->private;
        int is_lcd, is_crt, is_tv;
        u32 value;

        if (get_video_status(dev, &value))
                return -EIO;

        is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0;
        is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0;
        is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0;

        seq_printf(m, "lcd_out:                 %d\n", is_lcd);
        seq_printf(m, "crt_out:                 %d\n", is_crt);
        seq_printf(m, "tv_out:                  %d\n", is_tv);

        return 0;
}

static int video_proc_open(struct inode *inode, struct file *file)
{
        return single_open(file, video_proc_show, pde_data(inode));
}

static ssize_t video_proc_write(struct file *file, const char __user *buf,
                                size_t count, loff_t *pos)
{
        struct toshiba_acpi_dev *dev = pde_data(file_inode(file));
        char *buffer;
        char *cmd;
        int lcd_out = -1, crt_out = -1, tv_out = -1;
        int remain = count;
        int value;
        int ret;
        u32 video_out;

        cmd = memdup_user_nul(buf, count);
        if (IS_ERR(cmd))
                return PTR_ERR(cmd);

        buffer = cmd;

        /*
         * Scan expression.  Multiple expressions may be delimited with ;
         * NOTE: To keep scanning simple, invalid fields are ignored.
         */
        while (remain) {
                if (sscanf(buffer, " lcd_out : %i", &value) == 1)
                        lcd_out = value & 1;
                else if (sscanf(buffer, " crt_out : %i", &value) == 1)
                        crt_out = value & 1;
                else if (sscanf(buffer, " tv_out : %i", &value) == 1)
                        tv_out = value & 1;
                /* Advance to one character past the next ; */
                do {
                        ++buffer;
                        --remain;
                } while (remain && *(buffer - 1) != ';');
        }

        kfree(cmd);

        ret = get_video_status(dev, &video_out);
        if (!ret) {
                unsigned int new_video_out = video_out;

                if (lcd_out != -1)
                        _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out);
                if (crt_out != -1)
                        _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out);
                if (tv_out != -1)
                        _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out);
                /*
                 * To avoid unnecessary video disruption, only write the new
                 * video setting if something changed.
                 */
                if (new_video_out != video_out)
                        ret = write_acpi_int(METHOD_VIDEO_OUT, new_video_out);
        }

        return ret ? -EIO : count;
}

static const struct proc_ops video_proc_ops = {
        .proc_open      = video_proc_open,
        .proc_read      = seq_read,
        .proc_lseek     = seq_lseek,
        .proc_release   = single_release,
        .proc_write     = video_proc_write,
};

/* Fan status */
static int get_fan_status(struct toshiba_acpi_dev *dev, u32 *status)
{
        u32 result = hci_read(dev, HCI_FAN, status);

        if (result == TOS_FAILURE)
                pr_err("ACPI call to get Fan status failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return result == TOS_SUCCESS ? 0 : -EIO;
}

static int set_fan_status(struct toshiba_acpi_dev *dev, u32 status)
{
        u32 result = hci_write(dev, HCI_FAN, status);

        if (result == TOS_FAILURE)
                pr_err("ACPI call to set Fan status failed\n");
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return result == TOS_SUCCESS ? 0 : -EIO;
}

static int fan_proc_show(struct seq_file *m, void *v)
{
        struct toshiba_acpi_dev *dev = m->private;
        u32 value;

        if (get_fan_status(dev, &value))
                return -EIO;

        seq_printf(m, "running:                 %d\n", (value > 0));
        seq_printf(m, "force_on:                %d\n", dev->force_fan);

        return 0;
}

static int fan_proc_open(struct inode *inode, struct file *file)
{
        return single_open(file, fan_proc_show, pde_data(inode));
}

static ssize_t fan_proc_write(struct file *file, const char __user *buf,
                              size_t count, loff_t *pos)
{
        struct toshiba_acpi_dev *dev = pde_data(file_inode(file));
        char cmd[42];
        size_t len;
        int value;

        len = min(count, sizeof(cmd) - 1);
        if (copy_from_user(cmd, buf, len))
                return -EFAULT;
        cmd[len] = '\0';

        if (sscanf(cmd, " force_on : %i", &value) != 1 &&
            value != 0 && value != 1)
                return -EINVAL;

        if (set_fan_status(dev, value))
                return -EIO;

        dev->force_fan = value;

        return count;
}

static const struct proc_ops fan_proc_ops = {
        .proc_open      = fan_proc_open,
        .proc_read      = seq_read,
        .proc_lseek     = seq_lseek,
        .proc_release   = single_release,
        .proc_write     = fan_proc_write,
};

/* Fan RPM */
static int get_fan_rpm(struct toshiba_acpi_dev *dev, u32 *rpm)
{
        u32 in[TCI_WORDS] = { HCI_GET, HCI_FAN_RPM, 0, 1, 0, 0 };
        u32 out[TCI_WORDS];
        acpi_status status = tci_raw(dev, in, out);

        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to get Fan speed failed\n");
                return -EIO;
        }

        if (out[0] == TOS_NOT_SUPPORTED)
                return -ENODEV;

        if (out[0] == TOS_SUCCESS) {
                *rpm = out[2];
                return 0;
        }

        return -EIO;
}

static int keys_proc_show(struct seq_file *m, void *v)
{
        struct toshiba_acpi_dev *dev = m->private;

        seq_printf(m, "hotkey_ready:            %d\n", dev->key_event_valid);
        seq_printf(m, "hotkey:                  0x%04x\n", dev->last_key_event);

        return 0;
}

static int keys_proc_open(struct inode *inode, struct file *file)
{
        return single_open(file, keys_proc_show, pde_data(inode));
}

static ssize_t keys_proc_write(struct file *file, const char __user *buf,
                               size_t count, loff_t *pos)
{
        struct toshiba_acpi_dev *dev = pde_data(file_inode(file));
        char cmd[42];
        size_t len;
        int value;

        len = min(count, sizeof(cmd) - 1);
        if (copy_from_user(cmd, buf, len))
                return -EFAULT;
        cmd[len] = '\0';

        if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0)
                dev->key_event_valid = 0;
        else
                return -EINVAL;

        return count;
}

static const struct proc_ops keys_proc_ops = {
        .proc_open      = keys_proc_open,
        .proc_read      = seq_read,
        .proc_lseek     = seq_lseek,
        .proc_release   = single_release,
        .proc_write     = keys_proc_write,
};

static int __maybe_unused version_proc_show(struct seq_file *m, void *v)
{
        seq_printf(m, "driver:                  %s\n", TOSHIBA_ACPI_VERSION);
        seq_printf(m, "proc_interface:          %d\n", PROC_INTERFACE_VERSION);
        return 0;
}

/*
 * Proc and module init
 */

#define PROC_TOSHIBA            "toshiba"

static void create_toshiba_proc_entries(struct toshiba_acpi_dev *dev)
{
        if (dev->backlight_dev)
                proc_create_data("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir,
                                 &lcd_proc_ops, dev);
        if (dev->video_supported)
                proc_create_data("video", S_IRUGO | S_IWUSR, toshiba_proc_dir,
                                 &video_proc_ops, dev);
        if (dev->fan_supported)
                proc_create_data("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir,
                                 &fan_proc_ops, dev);
        if (dev->hotkey_dev)
                proc_create_data("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir,
                                 &keys_proc_ops, dev);
        proc_create_single_data("version", S_IRUGO, toshiba_proc_dir,
                        version_proc_show, dev);
}

static void remove_toshiba_proc_entries(struct toshiba_acpi_dev *dev)
{
        if (dev->backlight_dev)
                remove_proc_entry("lcd", toshiba_proc_dir);
        if (dev->video_supported)
                remove_proc_entry("video", toshiba_proc_dir);
        if (dev->fan_supported)
                remove_proc_entry("fan", toshiba_proc_dir);
        if (dev->hotkey_dev)
                remove_proc_entry("keys", toshiba_proc_dir);
        remove_proc_entry("version", toshiba_proc_dir);
}

static const struct backlight_ops toshiba_backlight_data = {
        .options = BL_CORE_SUSPENDRESUME,
        .get_brightness = get_lcd_brightness,
        .update_status  = set_lcd_status,
};

/* Keyboard backlight work */
static void toshiba_acpi_kbd_bl_work(struct work_struct *work);

static DECLARE_WORK(kbd_bl_work, toshiba_acpi_kbd_bl_work);

/*
 * Sysfs files
 */
static DEVICE_STRING_ATTR_RO(version, 0444, TOSHIBA_ACPI_VERSION);

static ssize_t fan_store(struct device *dev,
                         struct device_attribute *attr,
                         const char *buf, size_t count)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        int state;
        int ret;

        ret = kstrtoint(buf, 0, &state);
        if (ret)
                return ret;

        if (state != 0 && state != 1)
                return -EINVAL;

        ret = set_fan_status(toshiba, state);
        if (ret)
                return ret;

        return count;
}

static ssize_t fan_show(struct device *dev,
                        struct device_attribute *attr, char *buf)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        u32 value;
        int ret;

        ret = get_fan_status(toshiba, &value);
        if (ret)
                return ret;

        return sprintf(buf, "%d\n", value);
}
static DEVICE_ATTR_RW(fan);

static ssize_t kbd_backlight_mode_store(struct device *dev,
                                        struct device_attribute *attr,
                                        const char *buf, size_t count)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        int mode;
        int ret;


        ret = kstrtoint(buf, 0, &mode);
        if (ret)
                return ret;

        /* Check for supported modes depending on keyboard backlight type */
        if (toshiba->kbd_type == 1) {
                /* Type 1 supports SCI_KBD_MODE_FNZ and SCI_KBD_MODE_AUTO */
                if (mode != SCI_KBD_MODE_FNZ && mode != SCI_KBD_MODE_AUTO)
                        return -EINVAL;
        } else if (toshiba->kbd_type == 2) {
                /* Type 2 doesn't support SCI_KBD_MODE_FNZ */
                if (mode != SCI_KBD_MODE_AUTO && mode != SCI_KBD_MODE_ON &&
                    mode != SCI_KBD_MODE_OFF)
                        return -EINVAL;
        }

        /*
         * Set the Keyboard Backlight Mode where:
         *      Auto - KBD backlight turns off automatically in given time
         *      FN-Z - KBD backlight "toggles" when hotkey pressed
         *      ON   - KBD backlight is always on
         *      OFF  - KBD backlight is always off
         */

        /* Only make a change if the actual mode has changed */
        if (toshiba->kbd_mode != mode) {
                /* Shift the time to "base time" (0x3c0000 == 60 seconds) */
                int time = toshiba->kbd_time << HCI_MISC_SHIFT;

                /* OR the "base time" to the actual method format */
                if (toshiba->kbd_type == 1) {
                        /* Type 1 requires the current mode */
                        time |= toshiba->kbd_mode;
                } else if (toshiba->kbd_type == 2) {
                        /* Type 2 requires the desired mode */
                        time |= mode;
                }

                ret = toshiba_kbd_illum_status_set(toshiba, time);
                if (ret)
                        return ret;

                toshiba->kbd_mode = mode;
                toshiba_acpi->kbd_mode = mode;

                /*
                 * Some laptop models with the second generation backlit
                 * keyboard (type 2) do not generate the keyboard backlight
                 * changed event (0x92), and thus, the driver will never update
                 * the sysfs entries.
                 *
                 * The event is generated right when changing the keyboard
                 * backlight mode and the *notify function will set the
                 * kbd_event_generated to true.
                 *
                 * In case the event is not generated, schedule the keyboard
                 * backlight work to update the sysfs entries and emulate the
                 * event via genetlink.
                 */
                if (toshiba->kbd_type == 2 &&
                    !toshiba->kbd_event_generated)
                        schedule_work(&kbd_bl_work);
        }

        return count;
}

static ssize_t kbd_backlight_mode_show(struct device *dev,
                                       struct device_attribute *attr,
                                       char *buf)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        u32 time;

        if (toshiba_kbd_illum_status_get(toshiba, &time) < 0)
                return -EIO;

        return sprintf(buf, "%i\n", time & SCI_KBD_MODE_MASK);
}
static DEVICE_ATTR_RW(kbd_backlight_mode);

static ssize_t kbd_type_show(struct device *dev,
                             struct device_attribute *attr, char *buf)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);

        return sprintf(buf, "%d\n", toshiba->kbd_type);
}
static DEVICE_ATTR_RO(kbd_type);

static ssize_t available_kbd_modes_show(struct device *dev,
                                        struct device_attribute *attr,
                                        char *buf)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);

        if (toshiba->kbd_type == 1)
                return sprintf(buf, "0x%x 0x%x\n",
                               SCI_KBD_MODE_FNZ, SCI_KBD_MODE_AUTO);

        return sprintf(buf, "0x%x 0x%x 0x%x\n",
                       SCI_KBD_MODE_AUTO, SCI_KBD_MODE_ON, SCI_KBD_MODE_OFF);
}
static DEVICE_ATTR_RO(available_kbd_modes);

static ssize_t kbd_backlight_timeout_store(struct device *dev,
                                           struct device_attribute *attr,
                                           const char *buf, size_t count)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        int time;
        int ret;

        ret = kstrtoint(buf, 0, &time);
        if (ret)
                return ret;

        /* Check for supported values depending on kbd_type */
        if (toshiba->kbd_type == 1) {
                if (time < 0 || time > 60)
                        return -EINVAL;
        } else if (toshiba->kbd_type == 2) {
                if (time < 1 || time > 60)
                        return -EINVAL;
        }

        /* Set the Keyboard Backlight Timeout */

        /* Only make a change if the actual timeout has changed */
        if (toshiba->kbd_time != time) {
                /* Shift the time to "base time" (0x3c0000 == 60 seconds) */
                time = time << HCI_MISC_SHIFT;
                /* OR the "base time" to the actual method format */
                if (toshiba->kbd_type == 1)
                        time |= SCI_KBD_MODE_FNZ;
                else if (toshiba->kbd_type == 2)
                        time |= SCI_KBD_MODE_AUTO;

                ret = toshiba_kbd_illum_status_set(toshiba, time);
                if (ret)
                        return ret;

                toshiba->kbd_time = time >> HCI_MISC_SHIFT;
        }

        return count;
}

static ssize_t kbd_backlight_timeout_show(struct device *dev,
                                          struct device_attribute *attr,
                                          char *buf)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        u32 time;

        if (toshiba_kbd_illum_status_get(toshiba, &time) < 0)
                return -EIO;

        return sprintf(buf, "%i\n", time >> HCI_MISC_SHIFT);
}
static DEVICE_ATTR_RW(kbd_backlight_timeout);

static ssize_t touchpad_store(struct device *dev,
                              struct device_attribute *attr,
                              const char *buf, size_t count)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        int state;
        int ret;

        /* Set the TouchPad on/off, 0 - Disable | 1 - Enable */
        ret = kstrtoint(buf, 0, &state);
        if (ret)
                return ret;
        if (state != 0 && state != 1)
                return -EINVAL;

        ret = toshiba_touchpad_set(toshiba, state);
        if (ret)
                return ret;

        return count;
}

static ssize_t touchpad_show(struct device *dev,
                             struct device_attribute *attr, char *buf)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        u32 state;
        int ret;

        ret = toshiba_touchpad_get(toshiba, &state);
        if (ret < 0)
                return ret;

        return sprintf(buf, "%i\n", state);
}
static DEVICE_ATTR_RW(touchpad);

static ssize_t usb_sleep_charge_show(struct device *dev,
                                     struct device_attribute *attr, char *buf)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        u32 mode;
        int ret;

        ret = toshiba_usb_sleep_charge_get(toshiba, &mode);
        if (ret < 0)
                return ret;

        return sprintf(buf, "%x\n", mode & SCI_USB_CHARGE_MODE_MASK);
}

static ssize_t usb_sleep_charge_store(struct device *dev,
                                      struct device_attribute *attr,
                                      const char *buf, size_t count)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        int state;
        u32 mode;
        int ret;

        ret = kstrtoint(buf, 0, &state);
        if (ret)
                return ret;
        /*
         * Check for supported values, where:
         * 0 - Disabled
         * 1 - Alternate (Non USB conformant devices that require more power)
         * 2 - Auto (USB conformant devices)
         * 3 - Typical
         */
        if (state != 0 && state != 1 && state != 2 && state != 3)
                return -EINVAL;

        /* Set the USB charging mode to internal value */
        mode = toshiba->usbsc_mode_base;
        if (state == 0)
                mode |= SCI_USB_CHARGE_DISABLED;
        else if (state == 1)
                mode |= SCI_USB_CHARGE_ALTERNATE;
        else if (state == 2)
                mode |= SCI_USB_CHARGE_AUTO;
        else if (state == 3)
                mode |= SCI_USB_CHARGE_TYPICAL;

        ret = toshiba_usb_sleep_charge_set(toshiba, mode);
        if (ret)
                return ret;

        return count;
}
static DEVICE_ATTR_RW(usb_sleep_charge);

static ssize_t sleep_functions_on_battery_show(struct device *dev,
                                               struct device_attribute *attr,
                                               char *buf)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        int bat_lvl, status;
        u32 state;
        int ret;
        int tmp;

        ret = toshiba_sleep_functions_status_get(toshiba, &state);
        if (ret < 0)
                return ret;

        /* Determine the status: 0x4 - Enabled | 0x1 - Disabled */
        tmp = state & SCI_USB_CHARGE_BAT_MASK;
        status = (tmp == 0x4) ? 1 : 0;
        /* Determine the battery level set */
        bat_lvl = state >> HCI_MISC_SHIFT;

        return sprintf(buf, "%d %d\n", status, bat_lvl);
}

static ssize_t sleep_functions_on_battery_store(struct device *dev,
                                                struct device_attribute *attr,
                                                const char *buf, size_t count)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        u32 status;
        int value;
        int ret;
        int tmp;

        ret = kstrtoint(buf, 0, &value);
        if (ret)
                return ret;

        /*
         * Set the status of the function:
         * 0 - Disabled
         * 1-100 - Enabled
         */
        if (value < 0 || value > 100)
                return -EINVAL;

        if (value == 0) {
                tmp = toshiba->usbsc_bat_level << HCI_MISC_SHIFT;
                status = tmp | SCI_USB_CHARGE_BAT_LVL_OFF;
        } else {
                tmp = value << HCI_MISC_SHIFT;
                status = tmp | SCI_USB_CHARGE_BAT_LVL_ON;
        }
        ret = toshiba_sleep_functions_status_set(toshiba, status);
        if (ret < 0)
                return ret;

        toshiba->usbsc_bat_level = status >> HCI_MISC_SHIFT;

        return count;
}
static DEVICE_ATTR_RW(sleep_functions_on_battery);

static ssize_t usb_rapid_charge_show(struct device *dev,
                                     struct device_attribute *attr, char *buf)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        u32 state;
        int ret;

        ret = toshiba_usb_rapid_charge_get(toshiba, &state);
        if (ret < 0)
                return ret;

        return sprintf(buf, "%d\n", state);
}

static ssize_t usb_rapid_charge_store(struct device *dev,
                                      struct device_attribute *attr,
                                      const char *buf, size_t count)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        int state;
        int ret;

        ret = kstrtoint(buf, 0, &state);
        if (ret)
                return ret;
        if (state != 0 && state != 1)
                return -EINVAL;

        ret = toshiba_usb_rapid_charge_set(toshiba, state);
        if (ret)
                return ret;

        return count;
}
static DEVICE_ATTR_RW(usb_rapid_charge);

static ssize_t usb_sleep_music_show(struct device *dev,
                                    struct device_attribute *attr, char *buf)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        u32 state;
        int ret;

        ret = toshiba_usb_sleep_music_get(toshiba, &state);
        if (ret < 0)
                return ret;

        return sprintf(buf, "%d\n", state);
}

static ssize_t usb_sleep_music_store(struct device *dev,
                                     struct device_attribute *attr,
                                     const char *buf, size_t count)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        int state;
        int ret;

        ret = kstrtoint(buf, 0, &state);
        if (ret)
                return ret;
        if (state != 0 && state != 1)
                return -EINVAL;

        ret = toshiba_usb_sleep_music_set(toshiba, state);
        if (ret)
                return ret;

        return count;
}
static DEVICE_ATTR_RW(usb_sleep_music);

static ssize_t kbd_function_keys_show(struct device *dev,
                                      struct device_attribute *attr, char *buf)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        int mode;
        int ret;

        ret = toshiba_function_keys_get(toshiba, &mode);
        if (ret < 0)
                return ret;

        return sprintf(buf, "%d\n", mode);
}

static ssize_t kbd_function_keys_store(struct device *dev,
                                       struct device_attribute *attr,
                                       const char *buf, size_t count)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        int mode;
        int ret;

        ret = kstrtoint(buf, 0, &mode);
        if (ret)
                return ret;
        /*
         * Check for the function keys mode where:
         * 0 - Normal operation (F{1-12} as usual and hotkeys via FN-F{1-12})
         * 1 - Special functions (Opposite of the above setting)
         */
        if (mode != 0 && mode != 1)
                return -EINVAL;

        ret = toshiba_function_keys_set(toshiba, mode);
        if (ret)
                return ret;

        pr_info("Reboot for changes to KBD Function Keys to take effect");

        return count;
}
static DEVICE_ATTR_RW(kbd_function_keys);

static ssize_t panel_power_on_show(struct device *dev,
                                   struct device_attribute *attr, char *buf)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        u32 state;
        int ret;

        ret = toshiba_panel_power_on_get(toshiba, &state);
        if (ret < 0)
                return ret;

        return sprintf(buf, "%d\n", state);
}

static ssize_t panel_power_on_store(struct device *dev,
                                    struct device_attribute *attr,
                                    const char *buf, size_t count)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        int state;
        int ret;

        ret = kstrtoint(buf, 0, &state);
        if (ret)
                return ret;
        if (state != 0 && state != 1)
                return -EINVAL;

        ret = toshiba_panel_power_on_set(toshiba, state);
        if (ret)
                return ret;

        pr_info("Reboot for changes to Panel Power ON to take effect");

        return count;
}
static DEVICE_ATTR_RW(panel_power_on);

static ssize_t usb_three_show(struct device *dev,
                              struct device_attribute *attr, char *buf)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        u32 state;
        int ret;

        ret = toshiba_usb_three_get(toshiba, &state);
        if (ret < 0)
                return ret;

        return sprintf(buf, "%d\n", state);
}

static ssize_t usb_three_store(struct device *dev,
                               struct device_attribute *attr,
                               const char *buf, size_t count)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        int state;
        int ret;

        ret = kstrtoint(buf, 0, &state);
        if (ret)
                return ret;
        /*
         * Check for USB 3 mode where:
         * 0 - Disabled (Acts like a USB 2 port, saving power)
         * 1 - Enabled
         */
        if (state != 0 && state != 1)
                return -EINVAL;

        ret = toshiba_usb_three_set(toshiba, state);
        if (ret)
                return ret;

        pr_info("Reboot for changes to USB 3 to take effect");

        return count;
}
static DEVICE_ATTR_RW(usb_three);

static ssize_t cooling_method_show(struct device *dev,
                                   struct device_attribute *attr, char *buf)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        int state;
        int ret;

        ret = toshiba_cooling_method_get(toshiba, &state);
        if (ret < 0)
                return ret;

        return sprintf(buf, "%d %d\n", state, toshiba->max_cooling_method);
}

static ssize_t cooling_method_store(struct device *dev,
                                    struct device_attribute *attr,
                                    const char *buf, size_t count)
{
        struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
        int state;
        int ret;

        ret = kstrtoint(buf, 0, &state);
        if (ret)
                return ret;

        /*
         * Check for supported values
         * Depending on the laptop model, some only support these two:
         * 0 - Maximum Performance
         * 1 - Battery Optimized
         *
         * While some others support all three methods:
         * 0 - Maximum Performance
         * 1 - Performance
         * 2 - Battery Optimized
         */
        if (state < 0 || state > toshiba->max_cooling_method)
                return -EINVAL;

        ret = toshiba_cooling_method_set(toshiba, state);
        if (ret)
                return ret;

        return count;
}
static DEVICE_ATTR_RW(cooling_method);

static struct attribute *toshiba_attributes[] = {
        &dev_attr_version.attr.attr,
        &dev_attr_fan.attr,
        &dev_attr_kbd_backlight_mode.attr,
        &dev_attr_kbd_type.attr,
        &dev_attr_available_kbd_modes.attr,
        &dev_attr_kbd_backlight_timeout.attr,
        &dev_attr_touchpad.attr,
        &dev_attr_usb_sleep_charge.attr,
        &dev_attr_sleep_functions_on_battery.attr,
        &dev_attr_usb_rapid_charge.attr,
        &dev_attr_usb_sleep_music.attr,
        &dev_attr_kbd_function_keys.attr,
        &dev_attr_panel_power_on.attr,
        &dev_attr_usb_three.attr,
        &dev_attr_cooling_method.attr,
        NULL,
};

static umode_t toshiba_sysfs_is_visible(struct kobject *kobj,
                                        struct attribute *attr, int idx)
{
        struct device *dev = kobj_to_dev(kobj);
        struct toshiba_acpi_dev *drv = dev_get_drvdata(dev);
        bool exists = true;

        if (attr == &dev_attr_fan.attr)
                exists = (drv->fan_supported) ? true : false;
        else if (attr == &dev_attr_kbd_backlight_mode.attr)
                exists = (drv->kbd_illum_supported) ? true : false;
        else if (attr == &dev_attr_kbd_backlight_timeout.attr)
                exists = (drv->kbd_mode == SCI_KBD_MODE_AUTO) ? true : false;
        else if (attr == &dev_attr_touchpad.attr)
                exists = (drv->touchpad_supported) ? true : false;
        else if (attr == &dev_attr_usb_sleep_charge.attr)
                exists = (drv->usb_sleep_charge_supported) ? true : false;
        else if (attr == &dev_attr_sleep_functions_on_battery.attr)
                exists = (drv->usb_sleep_charge_supported) ? true : false;
        else if (attr == &dev_attr_usb_rapid_charge.attr)
                exists = (drv->usb_rapid_charge_supported) ? true : false;
        else if (attr == &dev_attr_usb_sleep_music.attr)
                exists = (drv->usb_sleep_music_supported) ? true : false;
        else if (attr == &dev_attr_kbd_function_keys.attr)
                exists = (drv->kbd_function_keys_supported) ? true : false;
        else if (attr == &dev_attr_panel_power_on.attr)
                exists = (drv->panel_power_on_supported) ? true : false;
        else if (attr == &dev_attr_usb_three.attr)
                exists = (drv->usb_three_supported) ? true : false;
        else if (attr == &dev_attr_cooling_method.attr)
                exists = (drv->cooling_method_supported) ? true : false;

        return exists ? attr->mode : 0;
}

static const struct attribute_group toshiba_attr_group = {
        .is_visible = toshiba_sysfs_is_visible,
        .attrs = toshiba_attributes,
};

static void toshiba_acpi_kbd_bl_work(struct work_struct *work)
{
        /* Update the sysfs entries */
        if (sysfs_update_group(&toshiba_acpi->acpi_dev->dev.kobj,
                               &toshiba_attr_group))
                pr_err("Unable to update sysfs entries\n");

        /* Notify LED subsystem about keyboard backlight change */
        if (toshiba_acpi->kbd_type == 2 &&
            toshiba_acpi->kbd_mode != SCI_KBD_MODE_AUTO)
                led_classdev_notify_brightness_hw_changed(&toshiba_acpi->kbd_led,
                                (toshiba_acpi->kbd_mode == SCI_KBD_MODE_ON) ?
                                LED_FULL : LED_OFF);

        /* Emulate the keyboard backlight event */
        acpi_bus_generate_netlink_event(toshiba_acpi->acpi_dev->pnp.device_class,
                                        dev_name(&toshiba_acpi->acpi_dev->dev),
                                        0x92, 0);
}

/*
 * IIO device
 */

enum toshiba_iio_accel_chan {
        AXIS_X,
        AXIS_Y,
        AXIS_Z
};

static int toshiba_iio_accel_get_axis(enum toshiba_iio_accel_chan chan)
{
        u32 xyval, zval;
        int ret;

        ret = toshiba_accelerometer_get(toshiba_acpi, &xyval, &zval);
        if (ret < 0)
                return ret;

        switch (chan) {
        case AXIS_X:
                return xyval & HCI_ACCEL_DIRECTION_MASK ?
                        -(xyval & HCI_ACCEL_MASK) : xyval & HCI_ACCEL_MASK;
        case AXIS_Y:
                return (xyval >> HCI_MISC_SHIFT) & HCI_ACCEL_DIRECTION_MASK ?
                        -((xyval >> HCI_MISC_SHIFT) & HCI_ACCEL_MASK) :
                        (xyval >> HCI_MISC_SHIFT) & HCI_ACCEL_MASK;
        case AXIS_Z:
                return zval & HCI_ACCEL_DIRECTION_MASK ?
                        -(zval & HCI_ACCEL_MASK) : zval & HCI_ACCEL_MASK;
        }

        return ret;
}

static int toshiba_iio_accel_read_raw(struct iio_dev *indio_dev,
                                      struct iio_chan_spec const *chan,
                                      int *val, int *val2, long mask)
{
        int ret;

        switch (mask) {
        case IIO_CHAN_INFO_RAW:
                ret = toshiba_iio_accel_get_axis(chan->channel);
                if (ret == -EIO || ret == -ENODEV)
                        return ret;

                *val = ret;

                return IIO_VAL_INT;
        }

        return -EINVAL;
}

#define TOSHIBA_IIO_ACCEL_CHANNEL(axis, chan) { \
        .type = IIO_ACCEL, \
        .modified = 1, \
        .channel = chan, \
        .channel2 = IIO_MOD_##axis, \
        .output = 1, \
        .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
}

static const struct iio_chan_spec toshiba_iio_accel_channels[] = {
        TOSHIBA_IIO_ACCEL_CHANNEL(X, AXIS_X),
        TOSHIBA_IIO_ACCEL_CHANNEL(Y, AXIS_Y),
        TOSHIBA_IIO_ACCEL_CHANNEL(Z, AXIS_Z),
};

static const struct iio_info toshiba_iio_accel_info = {
        .read_raw = &toshiba_iio_accel_read_raw,
};

/*
 * Misc device
 */
static int toshiba_acpi_smm_bridge(SMMRegisters *regs)
{
        u32 in[TCI_WORDS] = { regs->eax, regs->ebx, regs->ecx,
                              regs->edx, regs->esi, regs->edi };
        u32 out[TCI_WORDS];
        acpi_status status;

        status = tci_raw(toshiba_acpi, in, out);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI call to query SMM registers failed\n");
                return -EIO;
        }

        /* Fillout the SMM struct with the TCI call results */
        regs->eax = out[0];
        regs->ebx = out[1];
        regs->ecx = out[2];
        regs->edx = out[3];
        regs->esi = out[4];
        regs->edi = out[5];

        return 0;
}

static long toshiba_acpi_ioctl(struct file *fp, unsigned int cmd,
                               unsigned long arg)
{
        SMMRegisters __user *argp = (SMMRegisters __user *)arg;
        SMMRegisters regs;
        int ret;

        if (!argp)
                return -EINVAL;

        switch (cmd) {
        case TOSH_SMM:
                if (copy_from_user(&regs, argp, sizeof(SMMRegisters)))
                        return -EFAULT;
                ret = toshiba_acpi_smm_bridge(&regs);
                if (ret)
                        return ret;
                if (copy_to_user(argp, &regs, sizeof(SMMRegisters)))
                        return -EFAULT;
                break;
        case TOSHIBA_ACPI_SCI:
                if (copy_from_user(&regs, argp, sizeof(SMMRegisters)))
                        return -EFAULT;
                /* Ensure we are being called with a SCI_{GET, SET} register */
                if (regs.eax != SCI_GET && regs.eax != SCI_SET)
                        return -EINVAL;
                if (!sci_open(toshiba_acpi))
                        return -EIO;
                ret = toshiba_acpi_smm_bridge(&regs);
                sci_close(toshiba_acpi);
                if (ret)
                        return ret;
                if (copy_to_user(argp, &regs, sizeof(SMMRegisters)))
                        return -EFAULT;
                break;
        default:
                return -EINVAL;
        }

        return 0;
}

static const struct file_operations toshiba_acpi_fops = {
        .owner          = THIS_MODULE,
        .unlocked_ioctl = toshiba_acpi_ioctl,
        .llseek         = noop_llseek,
};

/*
 * WWAN RFKill handlers
 */
static int toshiba_acpi_wwan_set_block(void *data, bool blocked)
{
        struct toshiba_acpi_dev *dev = data;
        int ret;

        ret = toshiba_wireless_status(dev);
        if (ret)
                return ret;

        if (!dev->killswitch)
                return 0;

        return toshiba_wwan_set(dev, !blocked);
}

static void toshiba_acpi_wwan_poll(struct rfkill *rfkill, void *data)
{
        struct toshiba_acpi_dev *dev = data;

        if (toshiba_wireless_status(dev))
                return;

        rfkill_set_hw_state(dev->wwan_rfk, !dev->killswitch);
}

static const struct rfkill_ops wwan_rfk_ops = {
        .set_block = toshiba_acpi_wwan_set_block,
        .poll = toshiba_acpi_wwan_poll,
};

static int toshiba_acpi_setup_wwan_rfkill(struct toshiba_acpi_dev *dev)
{
        int ret = toshiba_wireless_status(dev);

        if (ret)
                return ret;

        dev->wwan_rfk = rfkill_alloc("Toshiba WWAN",
                                     &dev->acpi_dev->dev,
                                     RFKILL_TYPE_WWAN,
                                     &wwan_rfk_ops,
                                     dev);
        if (!dev->wwan_rfk) {
                pr_err("Unable to allocate WWAN rfkill device\n");
                return -ENOMEM;
        }

        rfkill_set_hw_state(dev->wwan_rfk, !dev->killswitch);

        ret = rfkill_register(dev->wwan_rfk);
        if (ret) {
                pr_err("Unable to register WWAN rfkill device\n");
                rfkill_destroy(dev->wwan_rfk);
        }

        return ret;
}

/*
 * Hotkeys
 */
static int toshiba_acpi_enable_hotkeys(struct toshiba_acpi_dev *dev)
{
        acpi_status status;
        u32 result;

        status = acpi_evaluate_object(dev->acpi_dev->handle,
                                      "ENAB", NULL, NULL);
        if (ACPI_FAILURE(status))
                return -ENODEV;

        /*
         * Enable quickstart buttons if supported.
         *
         * Enable the "Special Functions" mode only if they are
         * supported and if they are activated.
         */
        if (hci_hotkey_quickstart)
                result = hci_write(dev, HCI_HOTKEY_EVENT,
                                   HCI_HOTKEY_ENABLE_QUICKSTART);
        else if (dev->kbd_function_keys_supported && dev->special_functions)
                result = hci_write(dev, HCI_HOTKEY_EVENT,
                                   HCI_HOTKEY_SPECIAL_FUNCTIONS);
        else
                result = hci_write(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_ENABLE);

        if (result == TOS_FAILURE)
                return -EIO;
        else if (result == TOS_NOT_SUPPORTED)
                return -ENODEV;

        return 0;
}

static bool toshiba_acpi_i8042_filter(unsigned char data, unsigned char str,
                                      struct serio *port, void *context)
{
        if (str & I8042_STR_AUXDATA)
                return false;

        if (unlikely(data == 0xe0))
                return false;

        if ((data & 0x7f) == TOS1900_FN_SCAN) {
                schedule_work(&toshiba_acpi->hotkey_work);
                return true;
        }

        return false;
}

static void toshiba_acpi_hotkey_work(struct work_struct *work)
{
        acpi_handle ec_handle = ec_get_handle();
        acpi_status status;

        if (!ec_handle)
                return;

        status = acpi_evaluate_object(ec_handle, "NTFY", NULL, NULL);
        if (ACPI_FAILURE(status))
                pr_err("ACPI NTFY method execution failed\n");
}

/*
 * Returns hotkey scancode, or < 0 on failure.
 */
static int toshiba_acpi_query_hotkey(struct toshiba_acpi_dev *dev)
{
        unsigned long long value;
        acpi_status status;

        status = acpi_evaluate_integer(dev->acpi_dev->handle, "INFO",
                                      NULL, &value);
        if (ACPI_FAILURE(status)) {
                pr_err("ACPI INFO method execution failed\n");
                return -EIO;
        }

        return value;
}

static void toshiba_acpi_report_hotkey(struct toshiba_acpi_dev *dev,
                                       int scancode)
{
        if (scancode == 0x100)
                return;

        /* Act on key press; ignore key release */
        if (scancode & 0x80)
                return;

        if (!sparse_keymap_report_event(dev->hotkey_dev, scancode, 1, true))
                pr_info("Unknown key %x\n", scancode);
}

static void toshiba_acpi_process_hotkeys(struct toshiba_acpi_dev *dev)
{
        if (dev->info_supported) {
                int scancode = toshiba_acpi_query_hotkey(dev);

                if (scancode < 0) {
                        pr_err("Failed to query hotkey event\n");
                } else if (scancode != 0) {
                        toshiba_acpi_report_hotkey(dev, scancode);
                        dev->key_event_valid = 1;
                        dev->last_key_event = scancode;
                }
        } else if (dev->system_event_supported) {
                u32 result;
                u32 value;
                int retries = 3;

                do {
                        result = hci_read(dev, HCI_SYSTEM_EVENT, &value);
                        switch (result) {
                        case TOS_SUCCESS:
                                toshiba_acpi_report_hotkey(dev, (int)value);
                                dev->key_event_valid = 1;
                                dev->last_key_event = value;
                                break;
                        case TOS_NOT_SUPPORTED:
                                /*
                                 * This is a workaround for an unresolved
                                 * issue on some machines where system events
                                 * sporadically become disabled.
                                 */
                                result = hci_write(dev, HCI_SYSTEM_EVENT, 1);
                                if (result == TOS_SUCCESS)
                                        pr_notice("Re-enabled hotkeys\n");
                                fallthrough;
                        default:
                                retries--;
                                break;
                        }
                } while (retries && result != TOS_FIFO_EMPTY);
        }
}

static int toshiba_acpi_setup_keyboard(struct toshiba_acpi_dev *dev)
{
        const struct key_entry *keymap = toshiba_acpi_keymap;
        acpi_handle ec_handle;
        int error;

        if (disable_hotkeys) {
                pr_info("Hotkeys disabled by module parameter\n");
                return 0;
        }

        if (wmi_has_guid(TOSHIBA_WMI_EVENT_GUID)) {
                pr_info("WMI event detected, hotkeys will not be monitored\n");
                return 0;
        }

        error = toshiba_acpi_enable_hotkeys(dev);
        if (error)
                return error;

        if (toshiba_hotkey_event_type_get(dev, &dev->hotkey_event_type))
                pr_notice("Unable to query Hotkey Event Type\n");

        dev->hotkey_dev = input_allocate_device();
        if (!dev->hotkey_dev)
                return -ENOMEM;

        dev->hotkey_dev->name = "Toshiba input device";
        dev->hotkey_dev->phys = "toshiba_acpi/input0";
        dev->hotkey_dev->id.bustype = BUS_HOST;
        dev->hotkey_dev->dev.parent = &dev->acpi_dev->dev;

        if (dev->hotkey_event_type == HCI_SYSTEM_TYPE1 ||
            !dev->kbd_function_keys_supported)
                keymap = toshiba_acpi_keymap;
        else if (dev->hotkey_event_type == HCI_SYSTEM_TYPE2 ||
                 dev->kbd_function_keys_supported)
                keymap = toshiba_acpi_alt_keymap;
        else
                pr_info("Unknown event type received %x\n",
                        dev->hotkey_event_type);
        error = sparse_keymap_setup(dev->hotkey_dev, keymap, NULL);
        if (error)
                goto err_free_dev;

        /*
         * For some machines the SCI responsible for providing hotkey
         * notification doesn't fire. We can trigger the notification
         * whenever the Fn key is pressed using the NTFY method, if
         * supported, so if it's present set up an i8042 key filter
         * for this purpose.
         */
        ec_handle = ec_get_handle();
        if (ec_handle && acpi_has_method(ec_handle, "NTFY")) {
                INIT_WORK(&dev->hotkey_work, toshiba_acpi_hotkey_work);

                error = i8042_install_filter(toshiba_acpi_i8042_filter, NULL);
                if (error) {
                        pr_err("Error installing key filter\n");
                        goto err_free_dev;
                }

                dev->ntfy_supported = 1;
        }

        /*
         * Determine hotkey query interface. Prefer using the INFO
         * method when it is available.
         */
        if (acpi_has_method(dev->acpi_dev->handle, "INFO"))
                dev->info_supported = 1;
        else if (hci_write(dev, HCI_SYSTEM_EVENT, 1) == TOS_SUCCESS)
                dev->system_event_supported = 1;

        if (!dev->info_supported && !dev->system_event_supported) {
                pr_warn("No hotkey query interface found\n");
                error = -EINVAL;
                goto err_remove_filter;
        }

        error = input_register_device(dev->hotkey_dev);
        if (error) {
                pr_info("Unable to register input device\n");
                goto err_remove_filter;
        }

        return 0;

 err_remove_filter:
        if (dev->ntfy_supported)
                i8042_remove_filter(toshiba_acpi_i8042_filter);
 err_free_dev:
        input_free_device(dev->hotkey_dev);
        dev->hotkey_dev = NULL;
        return error;
}

static int toshiba_acpi_setup_backlight(struct toshiba_acpi_dev *dev)
{
        struct backlight_properties props;
        int brightness;
        int ret;

        /*
         * Some machines don't support the backlight methods at all, and
         * others support it read-only. Either of these is pretty useless,
         * so only register the backlight device if the backlight method
         * supports both reads and writes.
         */
        brightness = __get_lcd_brightness(dev);
        if (brightness < 0)
                return 0;
        /*
         * If transflective backlight is supported and the brightness is zero
         * (lowest brightness level), the set_lcd_brightness function will
         * activate the transflective backlight, making the LCD appear to be
         * turned off, simply increment the brightness level to avoid that.
         */
        if (dev->tr_backlight_supported && brightness == 0)
                brightness++;
        ret = set_lcd_brightness(dev, brightness);
        if (ret) {
                pr_debug("Backlight method is read-only, disabling backlight support\n");
                return 0;
        }

        if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
                return 0;

        memset(&props, 0, sizeof(props));
        props.type = BACKLIGHT_PLATFORM;
        props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1;

        /* Adding an extra level and having 0 change to transflective mode */
        if (dev->tr_backlight_supported)
                props.max_brightness++;

        dev->backlight_dev = backlight_device_register("toshiba",
                                                       &dev->acpi_dev->dev,
                                                       dev,
                                                       &toshiba_backlight_data,
                                                       &props);
        if (IS_ERR(dev->backlight_dev)) {
                ret = PTR_ERR(dev->backlight_dev);
                pr_err("Could not register toshiba backlight device\n");
                dev->backlight_dev = NULL;
                return ret;
        }

        dev->backlight_dev->props.brightness = brightness;
        return 0;
}

/* HWMON support for fan */
#if IS_ENABLED(CONFIG_HWMON)
static umode_t toshiba_acpi_hwmon_is_visible(const void *drvdata,
                                             enum hwmon_sensor_types type,
                                             u32 attr, int channel)
{
        return 0444;
}

static int toshiba_acpi_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
                                   u32 attr, int channel, long *val)
{
        /*
         * There is only a single channel and single attribute (for the
         * fan) at this point.
         * This can be replaced with more advanced logic in the future,
         * should the need arise.
         */
        if (type == hwmon_fan && channel == 0 && attr == hwmon_fan_input) {
                u32 value;
                int ret;

                ret = get_fan_rpm(toshiba_acpi, &value);
                if (ret)
                        return ret;

                *val = value;
                return 0;
        }
        return -EOPNOTSUPP;
}

static const struct hwmon_channel_info * const toshiba_acpi_hwmon_info[] = {
        HWMON_CHANNEL_INFO(fan, HWMON_F_INPUT),
        NULL
};

static const struct hwmon_ops toshiba_acpi_hwmon_ops = {
        .is_visible = toshiba_acpi_hwmon_is_visible,
        .read = toshiba_acpi_hwmon_read,
};

static const struct hwmon_chip_info toshiba_acpi_hwmon_chip_info = {
        .ops = &toshiba_acpi_hwmon_ops,
        .info = toshiba_acpi_hwmon_info,
};
#endif

/* ACPI battery hooking */
static ssize_t charge_control_end_threshold_show(struct device *device,
                                                 struct device_attribute *attr,
                                                 char *buf)
{
        u32 state;
        int status;

        if (toshiba_acpi == NULL) {
                pr_err("Toshiba ACPI object invalid\n");
                return -ENODEV;
        }

        status = toshiba_battery_charge_mode_get(toshiba_acpi, &state);

        if (status != 0)
                return status;

        if (state == 1)
                return sprintf(buf, "80\n");
        else
                return sprintf(buf, "100\n");
}

static ssize_t charge_control_end_threshold_store(struct device *dev,
                                                  struct device_attribute *attr,
                                                  const char *buf,
                                                  size_t count)
{
        u32 value;
        int rval;

        if (toshiba_acpi == NULL) {
                pr_err("Toshiba ACPI object invalid\n");
                return -ENODEV;
        }

        rval = kstrtou32(buf, 10, &value);
        if (rval)
                return rval;

        if (value < 1 || value > 100)
                return -EINVAL;
        rval = toshiba_battery_charge_mode_set(toshiba_acpi,
                                               (value < 90) ? 1 : 0);
        if (rval < 0)
                return rval;
        else
                return count;
}

static DEVICE_ATTR_RW(charge_control_end_threshold);

static struct attribute *toshiba_acpi_battery_attrs[] = {
        &dev_attr_charge_control_end_threshold.attr,
        NULL,
};

ATTRIBUTE_GROUPS(toshiba_acpi_battery);

static int toshiba_acpi_battery_add(struct power_supply *battery, struct acpi_battery_hook *hook)
{
        if (toshiba_acpi == NULL) {
                pr_err("Init order issue\n");
                return -ENODEV;
        }
        if (!toshiba_acpi->battery_charge_mode_supported)
                return -ENODEV;
        if (device_add_groups(&battery->dev, toshiba_acpi_battery_groups))
                return -ENODEV;
        return 0;
}

static int toshiba_acpi_battery_remove(struct power_supply *battery, struct acpi_battery_hook *hook)
{
        device_remove_groups(&battery->dev, toshiba_acpi_battery_groups);
        return 0;
}

static struct acpi_battery_hook battery_hook = {
        .add_battery = toshiba_acpi_battery_add,
        .remove_battery = toshiba_acpi_battery_remove,
        .name = "Toshiba Battery Extension",
};

static void print_supported_features(struct toshiba_acpi_dev *dev)
{
        pr_info("Supported laptop features:");

        if (dev->hotkey_dev)
                pr_cont(" hotkeys");
        if (dev->backlight_dev)
                pr_cont(" backlight");
        if (dev->video_supported)
                pr_cont(" video-out");
        if (dev->fan_supported)
                pr_cont(" fan");
        if (dev->fan_rpm_supported)
                pr_cont(" fan-rpm");
        if (dev->tr_backlight_supported)
                pr_cont(" transflective-backlight");
        if (dev->illumination_supported)
                pr_cont(" illumination");
        if (dev->kbd_illum_supported)
                pr_cont(" keyboard-backlight");
        if (dev->touchpad_supported)
                pr_cont(" touchpad");
        if (dev->eco_supported)
                pr_cont(" eco-led");
        if (dev->accelerometer_supported)
                pr_cont(" accelerometer-axes");
        if (dev->usb_sleep_charge_supported)
                pr_cont(" usb-sleep-charge");
        if (dev->usb_rapid_charge_supported)
                pr_cont(" usb-rapid-charge");
        if (dev->usb_sleep_music_supported)
                pr_cont(" usb-sleep-music");
        if (dev->kbd_function_keys_supported)
                pr_cont(" special-function-keys");
        if (dev->panel_power_on_supported)
                pr_cont(" panel-power-on");
        if (dev->usb_three_supported)
                pr_cont(" usb3");
        if (dev->wwan_supported)
                pr_cont(" wwan");
        if (dev->cooling_method_supported)
                pr_cont(" cooling-method");
        if (dev->battery_charge_mode_supported)
                pr_cont(" battery-charge-mode");

        pr_cont("\n");
}

static void toshiba_acpi_notify(acpi_handle handle, u32 event, void *data)
{
        struct toshiba_acpi_dev *dev = data;
        struct acpi_device *acpi_dev = dev->acpi_dev;

        switch (event) {
        case 0x80: /* Hotkeys and some system events */
                /*
                 * Machines with this WMI GUID aren't supported due to bugs in
                 * their AML.
                 *
                 * Return silently to avoid triggering a netlink event.
                 */
                if (wmi_has_guid(TOSHIBA_WMI_EVENT_GUID))
                        return;
                toshiba_acpi_process_hotkeys(dev);
                break;
        case 0x81: /* Dock events */
        case 0x82:
        case 0x83:
                pr_info("Dock event received %x\n", event);
                break;
        case 0x88: /* Thermal events */
                pr_info("Thermal event received\n");
                break;
        case 0x8f: /* LID closed */
        case 0x90: /* LID is closed and Dock has been ejected */
                break;
        case 0x8c: /* SATA power events */
        case 0x8b:
                pr_info("SATA power event received %x\n", event);
                break;
        case 0x92: /* Keyboard backlight mode changed */
                dev->kbd_event_generated = true;
                /* Update sysfs entries */
                if (sysfs_update_group(&acpi_dev->dev.kobj,
                                       &toshiba_attr_group))
                        pr_err("Unable to update sysfs entries\n");
                /* Notify LED subsystem about keyboard backlight change */
                if (dev->kbd_type == 2 && dev->kbd_mode != SCI_KBD_MODE_AUTO)
                        led_classdev_notify_brightness_hw_changed(&dev->kbd_led,
                                        (dev->kbd_mode == SCI_KBD_MODE_ON) ?
                                        LED_FULL : LED_OFF);
                break;
        case 0x8e: /* Power button pressed */
                break;
        case 0x85: /* Unknown */
        case 0x8d: /* Unknown */
        case 0x94: /* Unknown */
        case 0x95: /* Unknown */
        default:
                pr_info("Unknown event received %x\n", event);
                break;
        }

        acpi_bus_generate_netlink_event(acpi_dev->pnp.device_class,
                                        dev_name(&acpi_dev->dev),
                                        event, (event == 0x80) ?
                                        dev->last_key_event : 0);
}

static void toshiba_acpi_remove(struct platform_device *pdev)
{
        struct toshiba_acpi_dev *dev = platform_get_drvdata(pdev);

        misc_deregister(&dev->miscdev);

        remove_toshiba_proc_entries(dev);

        if (dev->notify_handler_installed)
                acpi_dev_remove_notify_handler(ACPI_COMPANION(&pdev->dev),
                                               ACPI_DEVICE_NOTIFY,
                                               toshiba_acpi_notify);

#if IS_ENABLED(CONFIG_HWMON)
        if (dev->hwmon_device)
                hwmon_device_unregister(dev->hwmon_device);
#endif

        if (dev->accelerometer_supported && dev->indio_dev) {
                iio_device_unregister(dev->indio_dev);
                iio_device_free(dev->indio_dev);
        }

        if (dev->sysfs_created)
                sysfs_remove_group(&dev->acpi_dev->dev.kobj,
                                   &toshiba_attr_group);

        if (dev->ntfy_supported) {
                i8042_remove_filter(toshiba_acpi_i8042_filter);
                cancel_work_sync(&dev->hotkey_work);
        }

        if (dev->hotkey_dev)
                input_unregister_device(dev->hotkey_dev);

        backlight_device_unregister(dev->backlight_dev);

        led_classdev_unregister(&dev->led_dev);
        led_classdev_unregister(&dev->kbd_led);
        led_classdev_unregister(&dev->eco_led);

        if (dev->wwan_rfk) {
                rfkill_unregister(dev->wwan_rfk);
                rfkill_destroy(dev->wwan_rfk);
        }

        if (dev->battery_charge_mode_supported)
                battery_hook_unregister(&battery_hook);

        if (toshiba_acpi)
                toshiba_acpi = NULL;

        dev_set_drvdata(&dev->acpi_dev->dev, NULL);

        kfree(dev);
}

static const char *find_hci_method(acpi_handle handle)
{
        if (acpi_has_method(handle, "GHCI"))
                return "GHCI";

        if (acpi_has_method(handle, "SPFC"))
                return "SPFC";

        return NULL;
}

/*
 * Some Toshibas have a broken acpi-video interface for brightness control,
 * these are quirked in drivers/acpi/video_detect.c to use the GPU native
 * (/sys/class/backlight/intel_backlight) instead.
 * But these need a HCI_SET call to actually turn the panel back on at resume,
 * without this call the screen stays black at resume.
 * Either HCI_LCD_BRIGHTNESS (used by acpi_video's _BCM) or HCI_PANEL_POWER_ON
 * works. toshiba_acpi_resume() uses HCI_PANEL_POWER_ON to avoid changing
 * the configured brightness level.
 */
#define QUIRK_TURN_ON_PANEL_ON_RESUME           BIT(0)
/*
 * Some Toshibas use "quickstart" keys. On these, HCI_HOTKEY_EVENT must use
 * the value HCI_HOTKEY_ENABLE_QUICKSTART.
 */
#define QUIRK_HCI_HOTKEY_QUICKSTART             BIT(1)

static const struct dmi_system_id toshiba_dmi_quirks[] __initconst = {
        {
         /* Toshiba Portégé R700 */
         /* https://bugzilla.kernel.org/show_bug.cgi?id=21012 */
         .matches = {
                DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
                DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R700"),
                },
         .driver_data = (void *)QUIRK_TURN_ON_PANEL_ON_RESUME,
        },
        {
         /* Toshiba Satellite/Portégé R830 */
         /* Portégé: https://bugs.freedesktop.org/show_bug.cgi?id=82634 */
         /* Satellite: https://bugzilla.kernel.org/show_bug.cgi?id=21012 */
         .matches = {
                DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
                DMI_MATCH(DMI_PRODUCT_NAME, "R830"),
                },
         .driver_data = (void *)QUIRK_TURN_ON_PANEL_ON_RESUME,
        },
        {
         /* Toshiba Satellite/Portégé Z830 */
         .matches = {
                DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
                DMI_MATCH(DMI_PRODUCT_NAME, "Z830"),
                },
         .driver_data = (void *)(QUIRK_TURN_ON_PANEL_ON_RESUME | QUIRK_HCI_HOTKEY_QUICKSTART),
        },
        { }
};

static int toshiba_acpi_probe(struct platform_device *pdev)
{
        struct acpi_device *acpi_dev;
        struct toshiba_acpi_dev *dev;
        const char *hci_method;
        u32 dummy;
        int ret = 0;

        if (toshiba_acpi)
                return -EBUSY;

        acpi_dev = ACPI_COMPANION(&pdev->dev);
        if (!acpi_dev)
                return -ENODEV;

        pr_info("Toshiba Laptop ACPI Extras version %s\n",
               TOSHIBA_ACPI_VERSION);

        hci_method = find_hci_method(acpi_dev->handle);
        if (!hci_method) {
                pr_err("HCI interface not found\n");
                return -ENODEV;
        }

        dev = kzalloc_obj(*dev);
        if (!dev)
                return -ENOMEM;
        dev->acpi_dev = acpi_dev;
        dev->method_hci = hci_method;
        dev->miscdev.minor = MISC_DYNAMIC_MINOR;
        dev->miscdev.name = "toshiba_acpi";
        dev->miscdev.fops = &toshiba_acpi_fops;

        ret = misc_register(&dev->miscdev);
        if (ret) {
                pr_err("Failed to register miscdevice\n");
                kfree(dev);
                return ret;
        }

        platform_set_drvdata(pdev, dev);
        dev_set_drvdata(&acpi_dev->dev, dev);

        /* Query the BIOS for supported features */

        /*
         * The "Special Functions" are always supported by the laptops
         * with the new keyboard layout, query for its presence to help
         * determine the keymap layout to use.
         */
        ret = toshiba_function_keys_get(dev, &dev->special_functions);
        dev->kbd_function_keys_supported = !ret;

        dev->hotkey_event_type = 0;
        if (toshiba_acpi_setup_keyboard(dev))
                pr_info("Unable to activate hotkeys\n");

        /* Determine whether or not BIOS supports transflective backlight */
        ret = get_tr_backlight_status(dev, &dummy);
        dev->tr_backlight_supported = !ret;

        ret = toshiba_acpi_setup_backlight(dev);
        if (ret)
                goto error;

        toshiba_illumination_available(dev);
        if (dev->illumination_supported) {
                dev->led_dev.name = "toshiba::illumination";
                dev->led_dev.max_brightness = 1;
                dev->led_dev.brightness_set = toshiba_illumination_set;
                dev->led_dev.brightness_get = toshiba_illumination_get;
                led_classdev_register(&pdev->dev, &dev->led_dev);
        }

        toshiba_eco_mode_available(dev);
        if (dev->eco_supported) {
                dev->eco_led.name = "toshiba::eco_mode";
                dev->eco_led.max_brightness = 1;
                dev->eco_led.brightness_set = toshiba_eco_mode_set_status;
                dev->eco_led.brightness_get = toshiba_eco_mode_get_status;
                led_classdev_register(&pdev->dev, &dev->eco_led);
        }

        toshiba_kbd_illum_available(dev);
        /*
         * Only register the LED if KBD illumination is supported
         * and the keyboard backlight operation mode is set to FN-Z
         * or we detect a second gen keyboard backlight
         */
        if (dev->kbd_illum_supported &&
            (dev->kbd_mode == SCI_KBD_MODE_FNZ || dev->kbd_type == 2)) {
                dev->kbd_led.name = "toshiba::kbd_backlight";
                dev->kbd_led.flags = LED_BRIGHT_HW_CHANGED;
                dev->kbd_led.max_brightness = 1;
                dev->kbd_led.brightness_set = toshiba_kbd_backlight_set;
                dev->kbd_led.brightness_get = toshiba_kbd_backlight_get;
                led_classdev_register(&pdev->dev, &dev->kbd_led);
        }

        ret = toshiba_touchpad_get(dev, &dummy);
        dev->touchpad_supported = !ret;

        toshiba_accelerometer_available(dev);
        if (dev->accelerometer_supported) {
                dev->indio_dev = iio_device_alloc(&pdev->dev, sizeof(*dev));
                if (!dev->indio_dev) {
                        pr_err("Unable to allocate iio device\n");
                        goto iio_error;
                }

                pr_info("Registering Toshiba accelerometer iio device\n");

                dev->indio_dev->info = &toshiba_iio_accel_info;
                dev->indio_dev->name = "Toshiba accelerometer";
                dev->indio_dev->modes = INDIO_DIRECT_MODE;
                dev->indio_dev->channels = toshiba_iio_accel_channels;
                dev->indio_dev->num_channels =
                                        ARRAY_SIZE(toshiba_iio_accel_channels);

                ret = iio_device_register(dev->indio_dev);
                if (ret < 0) {
                        pr_err("Unable to register iio device\n");
                        iio_device_free(dev->indio_dev);
                }
        }
iio_error:

        toshiba_usb_sleep_charge_available(dev);

        ret = toshiba_usb_rapid_charge_get(dev, &dummy);
        dev->usb_rapid_charge_supported = !ret;

        ret = toshiba_usb_sleep_music_get(dev, &dummy);
        dev->usb_sleep_music_supported = !ret;

        ret = toshiba_panel_power_on_get(dev, &dummy);
        dev->panel_power_on_supported = !ret;

        ret = toshiba_usb_three_get(dev, &dummy);
        dev->usb_three_supported = !ret;

        ret = get_video_status(dev, &dummy);
        dev->video_supported = !ret;

        ret = get_fan_status(dev, &dummy);
        dev->fan_supported = !ret;

        ret = get_fan_rpm(dev, &dummy);
        dev->fan_rpm_supported = !ret;

#if IS_ENABLED(CONFIG_HWMON)
        if (dev->fan_rpm_supported) {
                dev->hwmon_device = hwmon_device_register_with_info(
                        &pdev->dev, "toshiba_acpi_sensors", NULL,
                        &toshiba_acpi_hwmon_chip_info, NULL);
                if (IS_ERR(dev->hwmon_device)) {
                        dev->hwmon_device = NULL;
                        pr_warn("unable to register hwmon device, skipping\n");
                }
        }
#endif

        toshiba_wwan_available(dev);
        if (dev->wwan_supported)
                toshiba_acpi_setup_wwan_rfkill(dev);

        toshiba_cooling_method_available(dev);

        toshiba_battery_charge_mode_available(dev);

        print_supported_features(dev);

        ret = sysfs_create_group(&dev->acpi_dev->dev.kobj,
                                 &toshiba_attr_group);
        if (ret) {
                dev->sysfs_created = 0;
                goto error;
        }
        dev->sysfs_created = !ret;

        ret = acpi_dev_install_notify_handler(acpi_dev, ACPI_DEVICE_NOTIFY,
                                              toshiba_acpi_notify, dev);
        if (ret)
                goto error;

        dev->notify_handler_installed = 1;

        create_toshiba_proc_entries(dev);

        toshiba_acpi = dev;

        /*
         * As the battery hook relies on the static variable toshiba_acpi being
         * set, this must be done after toshiba_acpi is assigned.
         */
        if (dev->battery_charge_mode_supported)
                battery_hook_register(&battery_hook);

        return 0;

error:
        toshiba_acpi_remove(pdev);
        return ret;
}

#ifdef CONFIG_PM_SLEEP
static int toshiba_acpi_suspend(struct device *device)
{
        struct toshiba_acpi_dev *dev = dev_get_drvdata(device);

        if (dev->hotkey_dev) {
                u32 result;

                result = hci_write(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_DISABLE);
                if (result != TOS_SUCCESS)
                        pr_info("Unable to disable hotkeys\n");
        }

        return 0;
}

static int toshiba_acpi_resume(struct device *device)
{
        struct toshiba_acpi_dev *dev = dev_get_drvdata(device);

        if (dev->hotkey_dev) {
                if (toshiba_acpi_enable_hotkeys(dev))
                        pr_info("Unable to re-enable hotkeys\n");
        }

        if (dev->wwan_rfk) {
                if (!toshiba_wireless_status(dev))
                        rfkill_set_hw_state(dev->wwan_rfk, !dev->killswitch);
        }

        if (turn_on_panel_on_resume)
                hci_write(dev, HCI_PANEL_POWER_ON, 1);

        return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(toshiba_acpi_pm,
                         toshiba_acpi_suspend, toshiba_acpi_resume);

static struct platform_driver toshiba_acpi_driver = {
        .probe = toshiba_acpi_probe,
        .remove = toshiba_acpi_remove,
        .driver = {
                .name = "Toshiba ACPI driver",
                .acpi_match_table = toshiba_device_ids,
                .pm = &toshiba_acpi_pm,
        },
};

static void __init toshiba_dmi_init(void)
{
        const struct dmi_system_id *dmi_id;
        long quirks = 0;

        dmi_id = dmi_first_match(toshiba_dmi_quirks);
        if (dmi_id)
                quirks = (long)dmi_id->driver_data;

        if (turn_on_panel_on_resume == -1)
                turn_on_panel_on_resume = !!(quirks & QUIRK_TURN_ON_PANEL_ON_RESUME);

        if (hci_hotkey_quickstart == -1)
                hci_hotkey_quickstart = !!(quirks & QUIRK_HCI_HOTKEY_QUICKSTART);
}

static int __init toshiba_acpi_init(void)
{
        int ret;

        toshiba_dmi_init();
        toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir);
        if (!toshiba_proc_dir) {
                pr_err("Unable to create proc dir " PROC_TOSHIBA "\n");
                return -ENODEV;
        }

        ret = platform_driver_register(&toshiba_acpi_driver);
        if (ret) {
                pr_err("Failed to register ACPI driver: %d\n", ret);
                remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
        }

        return ret;
}

static void __exit toshiba_acpi_exit(void)
{
        platform_driver_unregister(&toshiba_acpi_driver);
        if (toshiba_proc_dir)
                remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
}

module_init(toshiba_acpi_init);
module_exit(toshiba_acpi_exit);