technisat-usb2.c

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/*
 * 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.
 *
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * 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;
};

/* 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[64];
    int ret, actual_length;

    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);
        txlen = 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);
        return -ENODEV;
    }

    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);
        return -ENODEV;
    }

    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 */))
            return -ENODEV;
    }

    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");

    return 0;
}

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 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 {
    LED_OFF,
    LED_BLINK,
    LED_ON,
    LED_UNDEFINED
};

static int technisat_usb2_set_led(struct dvb_usb_device *d, int red, enum technisat_usb2_led_state state)
{
    int ret;

    u8 led[8] = {
        red ? SET_RED_LED_VENDOR_REQUEST : SET_GREEN_LED_VENDOR_REQUEST,
        0
    };

    if (disable_led_control && state != LED_OFF)
        return 0;

    switch (state) {
    case LED_ON:
        led[1] = 0x82;
        break;
    case 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 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, sizeof(led), 500);

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

static int technisat_usb2_set_led_timer(struct dvb_usb_device *d, u8 red, u8 green)
{
    int ret;
    u8 b = 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, LED_BLINK);
            else
                technisat_usb2_set_led(state->dev, 0, LED_ON);
        } else
            technisat_usb2_set_led(state->dev, 0, 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,
        struct dvb_usb_device_properties *props,
        struct dvb_usb_device_description **desc, int *cold)
{
    int ret;
    u8 version[3];

    /* 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, sizeof(version), 500);

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

    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, LED_OFF);
    /* red led is turned on all the time */
    technisat_usb2_set_led(d, 1, 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;
}

/* frontend attach */
static int technisat_usb2_set_voltage(struct dvb_frontend *fe,
        fe_sec_voltage_t 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 (stv090x_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) {
        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 */
            strlcpy(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)
{
    u8 buf[62], *b;
    int ret;
    struct ir_raw_event ev;

    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, sizeof(buf), 500);

unlock:
    mutex_unlock(&d->i2c_mutex);

    if (ret < 0)
        return ret;

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

    /* decoding */
    b = buf+1;

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

    ev.pulse = 0;
    while (1) {
        ev.pulse = !ev.pulse;
        ev.duration = (*b * FIRMWARE_CLOCK_DIVISOR * FIRMWARE_CLOCK_TICK) / 1000;
        ir_raw_event_store(d->rc_dev, &ev);

        b++;
        if (*b == 0xff) {
            ev.pulse = 0;
            ev.duration = 888888*2;
            ir_raw_event_store(d->rc_dev, &ev);
            break;
        }
    }

    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, LED_BLINK);

    return 0;
}

/* DVB-USB and USB stuff follows */
static struct usb_device_id technisat_usb2_id_table[] = {
    { USB_DEVICE(USB_VID_TECHNISAT, USB_PID_TECHNISAT_USB2_DVB_S2) },
    { 0 }       /* Terminating entry */
};
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 = 8,
                .endpoint = 0x2,
                .u = {
                    .isoc = {
                        .framesperurb = 32,
                        .framesize = 2048,
                        .interval = 3,
                    }
                }
            },
        }},
            .size_of_priv = 0,
        },
    },

    .num_device_descs = 1,
    .devices = {
        {   "Technisat SkyStar USB HD (DVB-S/S2)",
            { &technisat_usb2_id_table[0], 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_TYPE_ALL,
        .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 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 <[email protected]>");
MODULE_DESCRIPTION("Driver for Technisat DVB-S/S2 USB 2.0 device");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");