/*
 * Linux driver for Technisat DVB-S/S2 USB 2.0 device
 *
 * Copyright (C) 2010 Patrick Boettcher,
 *                    Kernel Labs Inc. PO Box 745, St James, NY 11780
 *
 * Development was sponsored by Technisat Digital UK Limited, whose
 * registered office is Witan Gate House 500 - 600 Witan Gate West,
 * Milton Keynes, MK9 1SH
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 *
 * THIS PROGRAM IS PROVIDED "AS IS" AND BOTH THE COPYRIGHT HOLDER AND
 * TECHNISAT DIGITAL UK LTD DISCLAIM ALL WARRANTIES WITH REGARD TO
 * THIS PROGRAM INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE.  NEITHER THE COPYRIGHT HOLDER
 * NOR TECHNISAT DIGITAL UK LIMITED SHALL BE LIABLE FOR ANY SPECIAL,
 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS PROGRAM. See the
 * GNU General Public License for more details.
 */

#define DVB_USB_LOG_PREFIX "technisat-usb2"
#include "dvb-usb.h"

#include "stv6110x.h"
#include "stv090x.h"

/* module parameters */
DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug,
                "set debugging level (bit-mask: 1=info,2=eeprom,4=i2c,8=rc)." \
                DVB_USB_DEBUG_STATUS);

/* disables all LED control command and
 * also does not start the signal polling thread */
static int disable_led_control;
module_param(disable_led_control, int, 0444);
MODULE_PARM_DESC(disable_led_control,
                "disable LED control of the device (default: 0 - LED control is active).");

/* device private data */
struct technisat_usb2_state {
        struct dvb_usb_device *dev;
        struct delayed_work green_led_work;
        u8 power_state;

        u16 last_scan_code;

        u8 buf[64];
};

/* debug print helpers */
#define deb_info(args...)    dprintk(debug, 0x01, args)
#define deb_eeprom(args...)  dprintk(debug, 0x02, args)
#define deb_i2c(args...)     dprintk(debug, 0x04, args)
#define deb_rc(args...)      dprintk(debug, 0x08, args)

/* vendor requests */
#define SET_IFCLK_TO_EXTERNAL_TSCLK_VENDOR_REQUEST 0xB3
#define SET_FRONT_END_RESET_VENDOR_REQUEST         0xB4
#define GET_VERSION_INFO_VENDOR_REQUEST            0xB5
#define SET_GREEN_LED_VENDOR_REQUEST               0xB6
#define SET_RED_LED_VENDOR_REQUEST                 0xB7
#define GET_IR_DATA_VENDOR_REQUEST                 0xB8
#define SET_LED_TIMER_DIVIDER_VENDOR_REQUEST       0xB9
#define SET_USB_REENUMERATION                      0xBA

/* i2c-access methods */
#define I2C_SPEED_100KHZ_BIT 0x40

#define I2C_STATUS_NAK 7
#define I2C_STATUS_OK 8

static int technisat_usb2_i2c_access(struct usb_device *udev,
                u8 device_addr, u8 *tx, u8 txlen, u8 *rx, u8 rxlen)
{
        u8 *b;
        int ret, actual_length;

        b = kmalloc(64, GFP_KERNEL);
        if (!b)
                return -ENOMEM;

        deb_i2c("i2c-access: %02x, tx: ", device_addr);
        debug_dump(tx, txlen, deb_i2c);
        deb_i2c(" ");

        if (txlen > 62) {
                err("i2c TX buffer can't exceed 62 bytes (dev 0x%02x)",
                                device_addr);
                txlen = 62;
        }
        if (rxlen > 62) {
                err("i2c RX buffer can't exceed 62 bytes (dev 0x%02x)",
                                device_addr);
                rxlen = 62;
        }

        b[0] = I2C_SPEED_100KHZ_BIT;
        b[1] = device_addr << 1;

        if (rx != NULL) {
                b[0] |= rxlen;
                b[1] |= 1;
        }

        memcpy(&b[2], tx, txlen);
        ret = usb_bulk_msg(udev,
                        usb_sndbulkpipe(udev, 0x01),
                        b, 2 + txlen,
                        NULL, 1000);

        if (ret < 0) {
                err("i2c-error: out failed %02x = %d", device_addr, ret);
                goto err;
        }

        ret = usb_bulk_msg(udev,
                        usb_rcvbulkpipe(udev, 0x01),
                        b, 64, &actual_length, 1000);
        if (ret < 0) {
                err("i2c-error: in failed %02x = %d", device_addr, ret);
                goto err;
        }

        if (b[0] != I2C_STATUS_OK) {
                err("i2c-error: %02x = %d", device_addr, b[0]);
                /* handle tuner-i2c-nak */
                if (!(b[0] == I2C_STATUS_NAK &&
                                device_addr == 0x60
                                /* && device_is_technisat_usb2 */))
                        goto err;
        }

        deb_i2c("status: %d, ", b[0]);

        if (rx != NULL) {
                memcpy(rx, &b[2], rxlen);

                deb_i2c("rx (%d): ", rxlen);
                debug_dump(rx, rxlen, deb_i2c);
        }

        deb_i2c("\n");

err:
        kfree(b);
        return ret;
}

static int technisat_usb2_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msg,
                                int num)
{
        int ret = 0, i;
        struct dvb_usb_device *d = i2c_get_adapdata(adap);

        /* Ensure nobody else hits the i2c bus while we're sending our
           sequence of messages, (such as the remote control thread) */
        if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
                return -EAGAIN;

        for (i = 0; i < num; i++) {
                if (i+1 < num && msg[i+1].flags & I2C_M_RD) {
                        ret = technisat_usb2_i2c_access(d->udev, msg[i+1].addr,
                                                msg[i].buf, msg[i].len,
                                                msg[i+1].buf, msg[i+1].len);
                        if (ret != 0)
                                break;
                        i++;
                } else {
                        ret = technisat_usb2_i2c_access(d->udev, msg[i].addr,
                                                msg[i].buf, msg[i].len,
                                                NULL, 0);
                        if (ret != 0)
                                break;
                }
        }

        if (ret == 0)
                ret = i;

        mutex_unlock(&d->i2c_mutex);

        return ret;
}

static u32 technisat_usb2_i2c_func(struct i2c_adapter *adapter)
{
        return I2C_FUNC_I2C;
}

static const struct i2c_algorithm technisat_usb2_i2c_algo = {
        .master_xfer   = technisat_usb2_i2c_xfer,
        .functionality = technisat_usb2_i2c_func,
};

#if 0
static void technisat_usb2_frontend_reset(struct usb_device *udev)
{
        usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
                        SET_FRONT_END_RESET_VENDOR_REQUEST,
                        USB_TYPE_VENDOR | USB_DIR_OUT,
                        10, 0,
                        NULL, 0, 500);
}
#endif

/* LED control */
enum technisat_usb2_led_state {
        TECH_LED_OFF,
        TECH_LED_BLINK,
        TECH_LED_ON,
        TECH_LED_UNDEFINED
};

static int technisat_usb2_set_led(struct dvb_usb_device *d, int red,
                                  enum technisat_usb2_led_state st)
{
        struct technisat_usb2_state *state = d->priv;
        u8 *led = state->buf;
        int ret;

        led[0] = red ? SET_RED_LED_VENDOR_REQUEST : SET_GREEN_LED_VENDOR_REQUEST;

        if (disable_led_control && st != TECH_LED_OFF)
                return 0;

        switch (st) {
        case TECH_LED_ON:
                led[1] = 0x82;
                break;
        case TECH_LED_BLINK:
                led[1] = 0x82;
                if (red) {
                        led[2] = 0x02;
                        led[3] = 10;
                        led[4] = 10;
                } else {
                        led[2] = 0xff;
                        led[3] = 50;
                        led[4] = 50;
                }
                led[5] = 1;
                break;

        default:
        case TECH_LED_OFF:
                led[1] = 0x80;
                break;
        }

        if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
                return -EAGAIN;

        ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
                red ? SET_RED_LED_VENDOR_REQUEST : SET_GREEN_LED_VENDOR_REQUEST,
                USB_TYPE_VENDOR | USB_DIR_OUT,
                0, 0,
                led, 8, 500);

        mutex_unlock(&d->i2c_mutex);
        return ret;
}

static int technisat_usb2_set_led_timer(struct dvb_usb_device *d, u8 red, u8 green)
{
        struct technisat_usb2_state *state = d->priv;
        u8 *b = state->buf;
        int ret;

        b[0] = 0;

        if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
                return -EAGAIN;

        ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
                SET_LED_TIMER_DIVIDER_VENDOR_REQUEST,
                USB_TYPE_VENDOR | USB_DIR_OUT,
                (red << 8) | green, 0,
                b, 1, 500);

        mutex_unlock(&d->i2c_mutex);

        return ret;
}

static void technisat_usb2_green_led_control(struct work_struct *work)
{
        struct technisat_usb2_state *state =
                container_of(work, struct technisat_usb2_state, green_led_work.work);
        struct dvb_frontend *fe = state->dev->adapter[0].fe_adap[0].fe;

        if (state->power_state == 0)
                goto schedule;

        if (fe != NULL) {
                enum fe_status status;

                if (fe->ops.read_status(fe, &status) != 0)
                        goto schedule;

                if (status & FE_HAS_LOCK) {
                        u32 ber;

                        if (fe->ops.read_ber(fe, &ber) != 0)
                                goto schedule;

                        if (ber > 1000)
                                technisat_usb2_set_led(state->dev, 0, TECH_LED_BLINK);
                        else
                                technisat_usb2_set_led(state->dev, 0, TECH_LED_ON);
                } else
                        technisat_usb2_set_led(state->dev, 0, TECH_LED_OFF);
        }

schedule:
        schedule_delayed_work(&state->green_led_work,
                        msecs_to_jiffies(500));
}

/* method to find out whether the firmware has to be downloaded or not */
static int technisat_usb2_identify_state(struct usb_device *udev,
                const struct dvb_usb_device_properties *props,
                const struct dvb_usb_device_description **desc, int *cold)
{
        int ret;
        u8 *version;

        version = kmalloc(3, GFP_KERNEL);
        if (!version)
                return -ENOMEM;

        /* first select the interface */
        if (usb_set_interface(udev, 0, 1) != 0)
                err("could not set alternate setting to 0");
        else
                info("set alternate setting");

        *cold = 0; /* by default do not download a firmware - just in case something is wrong */

        ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
                GET_VERSION_INFO_VENDOR_REQUEST,
                USB_TYPE_VENDOR | USB_DIR_IN,
                0, 0,
                version, 3, 500);

        if (ret < 0)
                *cold = 1;
        else {
                info("firmware version: %d.%d", version[1], version[2]);
                *cold = 0;
        }

        kfree(version);

        return 0;
}

/* power control */
static int technisat_usb2_power_ctrl(struct dvb_usb_device *d, int level)
{
        struct technisat_usb2_state *state = d->priv;

        state->power_state = level;

        if (disable_led_control)
                return 0;

        /* green led is turned off in any case - will be turned on when tuning */
        technisat_usb2_set_led(d, 0, TECH_LED_OFF);
        /* red led is turned on all the time */
        technisat_usb2_set_led(d, 1, TECH_LED_ON);
        return 0;
}

/* mac address reading - from the eeprom */
#if 0
static void technisat_usb2_eeprom_dump(struct dvb_usb_device *d)
{
        u8 reg;
        u8 b[16];
        int i, j;

        /* full EEPROM dump */
        for (j = 0; j < 256 * 4; j += 16) {
                reg = j;
                if (technisat_usb2_i2c_access(d->udev, 0x50 + j / 256, &reg, 1, b, 16) != 0)
                        break;

                deb_eeprom("EEPROM: %01x%02x: ", j / 256, reg);
                for (i = 0; i < 16; i++)
                        deb_eeprom("%02x ", b[i]);
                deb_eeprom("\n");
        }
}
#endif

static u8 technisat_usb2_calc_lrc(const u8 *b, u16 length)
{
        u8 lrc = 0;
        while (--length)
                lrc ^= *b++;
        return lrc;
}

static int technisat_usb2_eeprom_lrc_read(struct dvb_usb_device *d,
        u16 offset, u8 *b, u16 length, u8 tries)
{
        u8 bo = offset & 0xff;
        struct i2c_msg msg[] = {
                {
                        .addr = 0x50 | ((offset >> 8) & 0x3),
                        .buf = &bo,
                        .len = 1
                }, {
                        .addr = 0x50 | ((offset >> 8) & 0x3),
                        .flags  = I2C_M_RD,
                        .buf = b,
                        .len = length
                }
        };

        while (tries--) {
                int status;

                if (i2c_transfer(&d->i2c_adap, msg, 2) != 2)
                        break;

                status =
                        technisat_usb2_calc_lrc(b, length - 1) == b[length - 1];

                if (status)
                        return 0;
        }

        return -EREMOTEIO;
}

#define EEPROM_MAC_START 0x3f8
#define EEPROM_MAC_TOTAL 8
static int technisat_usb2_read_mac_address(struct dvb_usb_device *d,
                u8 mac[])
{
        u8 buf[EEPROM_MAC_TOTAL];

        if (technisat_usb2_eeprom_lrc_read(d, EEPROM_MAC_START,
                                buf, EEPROM_MAC_TOTAL, 4) != 0)
                return -ENODEV;

        memcpy(mac, buf, 6);
        return 0;
}

static struct stv090x_config technisat_usb2_stv090x_config;

/* frontend attach */
static int technisat_usb2_set_voltage(struct dvb_frontend *fe,
                                      enum fe_sec_voltage voltage)
{
        int i;
        u8 gpio[3] = { 0 }; /* 0 = 2, 1 = 3, 2 = 4 */

        gpio[2] = 1; /* high - voltage ? */

        switch (voltage) {
        case SEC_VOLTAGE_13:
                gpio[0] = 1;
                break;
        case SEC_VOLTAGE_18:
                gpio[0] = 1;
                gpio[1] = 1;
                break;
        default:
        case SEC_VOLTAGE_OFF:
                break;
        }

        for (i = 0; i < 3; i++)
                if (technisat_usb2_stv090x_config.set_gpio(fe, i+2, 0,
                                                           gpio[i], 0) != 0)
                        return -EREMOTEIO;
        return 0;
}

static struct stv090x_config technisat_usb2_stv090x_config = {
        .device         = STV0903,
        .demod_mode     = STV090x_SINGLE,
        .clk_mode       = STV090x_CLK_EXT,

        .xtal           = 8000000,
        .address        = 0x68,

        .ts1_mode       = STV090x_TSMODE_DVBCI,
        .ts1_clk        = 13400000,
        .ts1_tei        = 1,

        .repeater_level = STV090x_RPTLEVEL_64,

        .tuner_bbgain   = 6,
};

static struct stv6110x_config technisat_usb2_stv6110x_config = {
        .addr           = 0x60,
        .refclk         = 16000000,
        .clk_div        = 2,
};

static int technisat_usb2_frontend_attach(struct dvb_usb_adapter *a)
{
        struct usb_device *udev = a->dev->udev;
        int ret;

        a->fe_adap[0].fe = dvb_attach(stv090x_attach, &technisat_usb2_stv090x_config,
                        &a->dev->i2c_adap, STV090x_DEMODULATOR_0);

        if (a->fe_adap[0].fe) {
                const struct stv6110x_devctl *ctl;

                ctl = dvb_attach(stv6110x_attach,
                                a->fe_adap[0].fe,
                                &technisat_usb2_stv6110x_config,
                                &a->dev->i2c_adap);

                if (ctl) {
                        technisat_usb2_stv090x_config.tuner_init          = ctl->tuner_init;
                        technisat_usb2_stv090x_config.tuner_sleep         = ctl->tuner_sleep;
                        technisat_usb2_stv090x_config.tuner_set_mode      = ctl->tuner_set_mode;
                        technisat_usb2_stv090x_config.tuner_set_frequency = ctl->tuner_set_frequency;
                        technisat_usb2_stv090x_config.tuner_get_frequency = ctl->tuner_get_frequency;
                        technisat_usb2_stv090x_config.tuner_set_bandwidth = ctl->tuner_set_bandwidth;
                        technisat_usb2_stv090x_config.tuner_get_bandwidth = ctl->tuner_get_bandwidth;
                        technisat_usb2_stv090x_config.tuner_set_bbgain    = ctl->tuner_set_bbgain;
                        technisat_usb2_stv090x_config.tuner_get_bbgain    = ctl->tuner_get_bbgain;
                        technisat_usb2_stv090x_config.tuner_set_refclk    = ctl->tuner_set_refclk;
                        technisat_usb2_stv090x_config.tuner_get_status    = ctl->tuner_get_status;

                        /* call the init function once to initialize
                           tuner's clock output divider and demod's
                           master clock */
                        if (a->fe_adap[0].fe->ops.init)
                                a->fe_adap[0].fe->ops.init(a->fe_adap[0].fe);

                        if (mutex_lock_interruptible(&a->dev->i2c_mutex) < 0)
                                return -EAGAIN;

                        ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
                                        SET_IFCLK_TO_EXTERNAL_TSCLK_VENDOR_REQUEST,
                                        USB_TYPE_VENDOR | USB_DIR_OUT,
                                        0, 0,
                                        NULL, 0, 500);
                        mutex_unlock(&a->dev->i2c_mutex);

                        if (ret != 0)
                                err("could not set IF_CLK to external");

                        a->fe_adap[0].fe->ops.set_voltage = technisat_usb2_set_voltage;

                        /* if everything was successful assign a nice name to the frontend */
                        strscpy(a->fe_adap[0].fe->ops.info.name,
                                a->dev->desc->name,
                                sizeof(a->fe_adap[0].fe->ops.info.name));
                } else {
                        dvb_frontend_detach(a->fe_adap[0].fe);
                        a->fe_adap[0].fe = NULL;
                }
        }

        technisat_usb2_set_led_timer(a->dev, 1, 1);

        return a->fe_adap[0].fe == NULL ? -ENODEV : 0;
}

/* Remote control */

/* the device is giving providing raw IR-signals to the host mapping
 * it only to one remote control is just the default implementation
 */
#define NOMINAL_IR_BIT_TRANSITION_TIME_US 889
#define NOMINAL_IR_BIT_TIME_US (2 * NOMINAL_IR_BIT_TRANSITION_TIME_US)

#define FIRMWARE_CLOCK_TICK 83333
#define FIRMWARE_CLOCK_DIVISOR 256

#define IR_PERCENT_TOLERANCE 15

#define NOMINAL_IR_BIT_TRANSITION_TICKS ((NOMINAL_IR_BIT_TRANSITION_TIME_US * 1000 * 1000) / FIRMWARE_CLOCK_TICK)
#define NOMINAL_IR_BIT_TRANSITION_TICK_COUNT (NOMINAL_IR_BIT_TRANSITION_TICKS / FIRMWARE_CLOCK_DIVISOR)

#define NOMINAL_IR_BIT_TIME_TICKS ((NOMINAL_IR_BIT_TIME_US * 1000 * 1000) / FIRMWARE_CLOCK_TICK)
#define NOMINAL_IR_BIT_TIME_TICK_COUNT (NOMINAL_IR_BIT_TIME_TICKS / FIRMWARE_CLOCK_DIVISOR)

#define MINIMUM_IR_BIT_TRANSITION_TICK_COUNT (NOMINAL_IR_BIT_TRANSITION_TICK_COUNT - ((NOMINAL_IR_BIT_TRANSITION_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))
#define MAXIMUM_IR_BIT_TRANSITION_TICK_COUNT (NOMINAL_IR_BIT_TRANSITION_TICK_COUNT + ((NOMINAL_IR_BIT_TRANSITION_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))

#define MINIMUM_IR_BIT_TIME_TICK_COUNT (NOMINAL_IR_BIT_TIME_TICK_COUNT - ((NOMINAL_IR_BIT_TIME_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))
#define MAXIMUM_IR_BIT_TIME_TICK_COUNT (NOMINAL_IR_BIT_TIME_TICK_COUNT + ((NOMINAL_IR_BIT_TIME_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))

static int technisat_usb2_get_ir(struct dvb_usb_device *d)
{
        struct technisat_usb2_state *state = d->priv;
        struct ir_raw_event ev;
        u8 *buf = state->buf;
        int i, ret;

        buf[0] = GET_IR_DATA_VENDOR_REQUEST;
        buf[1] = 0x08;
        buf[2] = 0x8f;
        buf[3] = MINIMUM_IR_BIT_TRANSITION_TICK_COUNT;
        buf[4] = MAXIMUM_IR_BIT_TIME_TICK_COUNT;

        if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
                return -EAGAIN;
        ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
                        GET_IR_DATA_VENDOR_REQUEST,
                        USB_TYPE_VENDOR | USB_DIR_OUT,
                        0, 0,
                        buf, 5, 500);
        if (ret < 0)
                goto unlock;

        buf[1] = 0;
        buf[2] = 0;
        ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0),
                        GET_IR_DATA_VENDOR_REQUEST,
                        USB_TYPE_VENDOR | USB_DIR_IN,
                        0x8080, 0,
                        buf, 62, 500);

unlock:
        mutex_unlock(&d->i2c_mutex);

        if (ret < 0)
                return ret;

        if (ret == 1)
                return 0; /* no key pressed */

        /* decoding */

#if 0
        deb_rc("RC: %d ", ret);
        debug_dump(buf + 1, ret, deb_rc);
#endif

        ev.pulse = 0;
        for (i = 1; i < ARRAY_SIZE(state->buf); i++) {
                if (buf[i] == 0xff) {
                        ev.pulse = 0;
                        ev.duration = 889 * 2;
                        ir_raw_event_store(d->rc_dev, &ev);
                        break;
                }

                ev.pulse = !ev.pulse;
                ev.duration = (buf[i] * FIRMWARE_CLOCK_DIVISOR *
                               FIRMWARE_CLOCK_TICK) / (1000 * 1000);
                ir_raw_event_store(d->rc_dev, &ev);
        }

        ir_raw_event_handle(d->rc_dev);

        return 1;
}

static int technisat_usb2_rc_query(struct dvb_usb_device *d)
{
        int ret = technisat_usb2_get_ir(d);

        if (ret < 0)
                return ret;

        if (ret == 0)
                return 0;

        if (!disable_led_control)
                technisat_usb2_set_led(d, 1, TECH_LED_BLINK);

        return 0;
}

/* DVB-USB and USB stuff follows */
enum {
        TECHNISAT_USB2_DVB_S2,
};

static const struct usb_device_id technisat_usb2_id_table[] = {
        DVB_USB_DEV(TECHNISAT, TECHNISAT_USB2_DVB_S2),
        { }
};

MODULE_DEVICE_TABLE(usb, technisat_usb2_id_table);

/* device description */
static struct dvb_usb_device_properties technisat_usb2_devices = {
        .caps              = DVB_USB_IS_AN_I2C_ADAPTER,

        .usb_ctrl          = CYPRESS_FX2,

        .identify_state    = technisat_usb2_identify_state,
        .firmware          = "dvb-usb-SkyStar_USB_HD_FW_v17_63.HEX.fw",

        .size_of_priv      = sizeof(struct technisat_usb2_state),

        .i2c_algo          = &technisat_usb2_i2c_algo,

        .power_ctrl        = technisat_usb2_power_ctrl,
        .read_mac_address  = technisat_usb2_read_mac_address,

        .num_adapters = 1,
        .adapter = {
                {
                .num_frontends = 1,
                .fe = {{
                        .frontend_attach  = technisat_usb2_frontend_attach,

                        .stream = {
                                .type = USB_ISOC,
                                .count = 4,
                                .endpoint = 0x2,
                                .u = {
                                        .isoc = {
                                                .framesperurb = 32,
                                                .framesize = 2048,
                                                .interval = 1,
                                        }
                                }
                        },
                }},
                        .size_of_priv = 0,
                },
        },

        .num_device_descs = 1,
        .devices = {
                {   "Technisat SkyStar USB HD (DVB-S/S2)",
                        { &technisat_usb2_id_table[TECHNISAT_USB2_DVB_S2], NULL },
                        { NULL },
                },
        },

        .rc.core = {
                .rc_interval = 100,
                .rc_codes    = RC_MAP_TECHNISAT_USB2,
                .module_name = "technisat-usb2",
                .rc_query    = technisat_usb2_rc_query,
                .allowed_protos = RC_PROTO_BIT_ALL_IR_DECODER,
                .driver_type    = RC_DRIVER_IR_RAW,
        }
};

static int technisat_usb2_probe(struct usb_interface *intf,
                const struct usb_device_id *id)
{
        struct dvb_usb_device *dev;

        if (dvb_usb_device_init(intf, &technisat_usb2_devices, THIS_MODULE,
                                &dev, adapter_nr) != 0)
                return -ENODEV;

        if (dev) {
                struct technisat_usb2_state *state = dev->priv;
                state->dev = dev;

                if (!disable_led_control) {
                        INIT_DELAYED_WORK(&state->green_led_work,
                                        technisat_usb2_green_led_control);
                        schedule_delayed_work(&state->green_led_work,
                                        msecs_to_jiffies(500));
                }
        }

        return 0;
}

static void technisat_usb2_disconnect(struct usb_interface *intf)
{
        struct dvb_usb_device *dev = usb_get_intfdata(intf);

        /* work and stuff was only created when the device is hot-state */
        if (dev != NULL) {
                struct technisat_usb2_state *state = dev->priv;
                if (state != NULL)
                        cancel_delayed_work_sync(&state->green_led_work);
        }

        dvb_usb_device_exit(intf);
}

static struct usb_driver technisat_usb2_driver = {
        .name       = "dvb_usb_technisat_usb2",
        .probe      = technisat_usb2_probe,
        .disconnect = technisat_usb2_disconnect,
        .id_table   = technisat_usb2_id_table,
};

module_usb_driver(technisat_usb2_driver);

MODULE_AUTHOR("Patrick Boettcher <pboettcher@kernellabs.com>");
MODULE_DESCRIPTION("Driver for Technisat DVB-S/S2 USB 2.0 device");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");