dib0700_core.c

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/* Linux driver for devices based on the DiBcom DiB0700 USB bridge
 *
 *  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, version 2.
 *
 *  Copyright (C) 2005-6 DiBcom, SA
 */
#include "dib0700.h"

/* debug */
int dvb_usb_dib0700_debug;
module_param_named(debug,dvb_usb_dib0700_debug, int, 0644);
MODULE_PARM_DESC(debug, "set debugging level (1=info,2=fw,4=fwdata,8=data (or-able))." DVB_USB_DEBUG_STATUS);

static int nb_packet_buffer_size = 21;
module_param(nb_packet_buffer_size, int, 0644);
MODULE_PARM_DESC(nb_packet_buffer_size,
    "Set the dib0700 driver data buffer size. This parameter "
    "corresponds to the number of TS packets. The actual size of "
    "the data buffer corresponds to this parameter "
    "multiplied by 188 (default: 21)");

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);


int dib0700_get_version(struct dvb_usb_device *d, u32 *hwversion,
            u32 *romversion, u32 *ramversion, u32 *fwtype)
{
    struct dib0700_state *st = d->priv;
    int ret;

    if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
        err("could not acquire lock");
        return -EINTR;
    }

    ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0),
                  REQUEST_GET_VERSION,
                  USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
                  st->buf, 16, USB_CTRL_GET_TIMEOUT);
    if (hwversion != NULL)
        *hwversion  = (st->buf[0] << 24)  | (st->buf[1] << 16)  |
            (st->buf[2] << 8)  | st->buf[3];
    if (romversion != NULL)
        *romversion = (st->buf[4] << 24)  | (st->buf[5] << 16)  |
            (st->buf[6] << 8)  | st->buf[7];
    if (ramversion != NULL)
        *ramversion = (st->buf[8] << 24)  | (st->buf[9] << 16)  |
            (st->buf[10] << 8) | st->buf[11];
    if (fwtype != NULL)
        *fwtype     = (st->buf[12] << 24) | (st->buf[13] << 16) |
            (st->buf[14] << 8) | st->buf[15];
    mutex_unlock(&d->usb_mutex);
    return ret;
}

/* expecting rx buffer: request data[0] data[1] ... data[2] */
static int dib0700_ctrl_wr(struct dvb_usb_device *d, u8 *tx, u8 txlen)
{
    int status;

    deb_data(">>> ");
    debug_dump(tx, txlen, deb_data);

    status = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev,0),
        tx[0], USB_TYPE_VENDOR | USB_DIR_OUT, 0, 0, tx, txlen,
        USB_CTRL_GET_TIMEOUT);

    if (status != txlen)
        deb_data("ep 0 write error (status = %d, len: %d)\n",status,txlen);

    return status < 0 ? status : 0;
}

/* expecting tx buffer: request data[0] ... data[n] (n <= 4) */
int dib0700_ctrl_rd(struct dvb_usb_device *d, u8 *tx, u8 txlen, u8 *rx, u8 rxlen)
{
    u16 index, value;
    int status;

    if (txlen < 2) {
        err("tx buffer length is smaller than 2. Makes no sense.");
        return -EINVAL;
    }
    if (txlen > 4) {
        err("tx buffer length is larger than 4. Not supported.");
        return -EINVAL;
    }

    deb_data(">>> ");
    debug_dump(tx,txlen,deb_data);

    value = ((txlen - 2) << 8) | tx[1];
    index = 0;
    if (txlen > 2)
        index |= (tx[2] << 8);
    if (txlen > 3)
        index |= tx[3];

    status = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev,0), tx[0],
            USB_TYPE_VENDOR | USB_DIR_IN, value, index, rx, rxlen,
            USB_CTRL_GET_TIMEOUT);

    if (status < 0)
        deb_info("ep 0 read error (status = %d)\n",status);

    deb_data("<<< ");
    debug_dump(rx, rxlen, deb_data);

    return status; /* length in case of success */
}

int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_dir, u8 gpio_val)
{
    struct dib0700_state *st = d->priv;
    int ret;

    if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
        err("could not acquire lock");
        return -EINTR;
    }

    st->buf[0] = REQUEST_SET_GPIO;
    st->buf[1] = gpio;
    st->buf[2] = ((gpio_dir & 0x01) << 7) | ((gpio_val & 0x01) << 6);

    ret = dib0700_ctrl_wr(d, st->buf, 3);

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

static int dib0700_set_usb_xfer_len(struct dvb_usb_device *d, u16 nb_ts_packets)
{
    struct dib0700_state *st = d->priv;
    int ret;

    if (st->fw_version >= 0x10201) {
        if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
            err("could not acquire lock");
            return -EINTR;
        }

        st->buf[0] = REQUEST_SET_USB_XFER_LEN;
        st->buf[1] = (nb_ts_packets >> 8) & 0xff;
        st->buf[2] = nb_ts_packets & 0xff;

        deb_info("set the USB xfer len to %i Ts packet\n", nb_ts_packets);

        ret = dib0700_ctrl_wr(d, st->buf, 3);
        mutex_unlock(&d->usb_mutex);
    } else {
        deb_info("this firmware does not allow to change the USB xfer len\n");
        ret = -EIO;
    }

    return ret;
}

/*
 * I2C master xfer function (supported in 1.20 firmware)
 */
static int dib0700_i2c_xfer_new(struct i2c_adapter *adap, struct i2c_msg *msg,
                int num)
{
    /* The new i2c firmware messages are more reliable and in particular
       properly support i2c read calls not preceded by a write */

    struct dvb_usb_device *d = i2c_get_adapdata(adap);
    struct dib0700_state *st = d->priv;
    uint8_t bus_mode = 1;  /* 0=eeprom bus, 1=frontend bus */
    uint8_t gen_mode = 0; /* 0=master i2c, 1=gpio i2c */
    uint8_t en_start = 0;
    uint8_t en_stop = 0;
    int result, i;

    /* 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 -EINTR;

    for (i = 0; i < num; i++) {
        if (i == 0) {
            /* First message in the transaction */
            en_start = 1;
        } else if (!(msg[i].flags & I2C_M_NOSTART)) {
            /* Device supports repeated-start */
            en_start = 1;
        } else {
            /* Not the first packet and device doesn't support
               repeated start */
            en_start = 0;
        }
        if (i == (num - 1)) {
            /* Last message in the transaction */
            en_stop = 1;
        }

        if (msg[i].flags & I2C_M_RD) {
            /* Read request */
            u16 index, value;
            uint8_t i2c_dest;

            i2c_dest = (msg[i].addr << 1);
            value = ((en_start << 7) | (en_stop << 6) |
                 (msg[i].len & 0x3F)) << 8 | i2c_dest;
            /* I2C ctrl + FE bus; */
            index = ((gen_mode << 6) & 0xC0) |
                ((bus_mode << 4) & 0x30);

            result = usb_control_msg(d->udev,
                         usb_rcvctrlpipe(d->udev, 0),
                         REQUEST_NEW_I2C_READ,
                         USB_TYPE_VENDOR | USB_DIR_IN,
                         value, index, msg[i].buf,
                         msg[i].len,
                         USB_CTRL_GET_TIMEOUT);
            if (result < 0) {
                deb_info("i2c read error (status = %d)\n", result);
                break;
            }

            deb_data("<<< ");
            debug_dump(msg[i].buf, msg[i].len, deb_data);

        } else {
            /* Write request */
            if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
                err("could not acquire lock");
                mutex_unlock(&d->i2c_mutex);
                return -EINTR;
            }
            st->buf[0] = REQUEST_NEW_I2C_WRITE;
            st->buf[1] = msg[i].addr << 1;
            st->buf[2] = (en_start << 7) | (en_stop << 6) |
                (msg[i].len & 0x3F);
            /* I2C ctrl + FE bus; */
            st->buf[3] = ((gen_mode << 6) & 0xC0) |
                 ((bus_mode << 4) & 0x30);
            /* The Actual i2c payload */
            memcpy(&st->buf[4], msg[i].buf, msg[i].len);

            deb_data(">>> ");
            debug_dump(st->buf, msg[i].len + 4, deb_data);

            result = usb_control_msg(d->udev,
                         usb_sndctrlpipe(d->udev, 0),
                         REQUEST_NEW_I2C_WRITE,
                         USB_TYPE_VENDOR | USB_DIR_OUT,
                         0, 0, st->buf, msg[i].len + 4,
                         USB_CTRL_GET_TIMEOUT);
            mutex_unlock(&d->usb_mutex);
            if (result < 0) {
                deb_info("i2c write error (status = %d)\n", result);
                break;
            }
        }
    }
    mutex_unlock(&d->i2c_mutex);
    return i;
}

/*
 * I2C master xfer function (pre-1.20 firmware)
 */
static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap,
                   struct i2c_msg *msg, int num)
{
    struct dvb_usb_device *d = i2c_get_adapdata(adap);
    struct dib0700_state *st = d->priv;
    int i,len;

    if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
        return -EINTR;
    if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
        err("could not acquire lock");
        mutex_unlock(&d->i2c_mutex);
        return -EINTR;
    }

    for (i = 0; i < num; i++) {
        /* fill in the address */
        st->buf[1] = msg[i].addr << 1;
        /* fill the buffer */
        memcpy(&st->buf[2], msg[i].buf, msg[i].len);

        /* write/read request */
        if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
            st->buf[0] = REQUEST_I2C_READ;
            st->buf[1] |= 1;

            /* special thing in the current firmware: when length is zero the read-failed */
            len = dib0700_ctrl_rd(d, st->buf, msg[i].len + 2,
                    msg[i+1].buf, msg[i+1].len);
            if (len <= 0) {
                deb_info("I2C read failed on address 0x%02x\n",
                        msg[i].addr);
                break;
            }

            msg[i+1].len = len;

            i++;
        } else {
            st->buf[0] = REQUEST_I2C_WRITE;
            if (dib0700_ctrl_wr(d, st->buf, msg[i].len + 2) < 0)
                break;
        }
    }
    mutex_unlock(&d->usb_mutex);
    mutex_unlock(&d->i2c_mutex);

    return i;
}

static int dib0700_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msg,
                int num)
{
    struct dvb_usb_device *d = i2c_get_adapdata(adap);
    struct dib0700_state *st = d->priv;

    if (st->fw_use_new_i2c_api == 1) {
        /* User running at least fw 1.20 */
        return dib0700_i2c_xfer_new(adap, msg, num);
    } else {
        /* Use legacy calls */
        return dib0700_i2c_xfer_legacy(adap, msg, num);
    }
}

static u32 dib0700_i2c_func(struct i2c_adapter *adapter)
{
    return I2C_FUNC_I2C;
}

struct i2c_algorithm dib0700_i2c_algo = {
    .master_xfer   = dib0700_i2c_xfer,
    .functionality = dib0700_i2c_func,
};

int dib0700_identify_state(struct usb_device *udev, struct dvb_usb_device_properties *props,
            struct dvb_usb_device_description **desc, int *cold)
{
    s16 ret;
    u8 *b;

    b = kmalloc(16, GFP_KERNEL);
    if (!b)
        return  -ENOMEM;


    ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
        REQUEST_GET_VERSION, USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, b, 16, USB_CTRL_GET_TIMEOUT);

    deb_info("FW GET_VERSION length: %d\n",ret);

    *cold = ret <= 0;
    deb_info("cold: %d\n", *cold);

    kfree(b);
    return 0;
}

static int dib0700_set_clock(struct dvb_usb_device *d, u8 en_pll,
    u8 pll_src, u8 pll_range, u8 clock_gpio3, u16 pll_prediv,
    u16 pll_loopdiv, u16 free_div, u16 dsuScaler)
{
    struct dib0700_state *st = d->priv;
    int ret;

    if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
        err("could not acquire lock");
        return -EINTR;
    }

    st->buf[0] = REQUEST_SET_CLOCK;
    st->buf[1] = (en_pll << 7) | (pll_src << 6) |
        (pll_range << 5) | (clock_gpio3 << 4);
    st->buf[2] = (pll_prediv >> 8)  & 0xff; /* MSB */
    st->buf[3] =  pll_prediv        & 0xff; /* LSB */
    st->buf[4] = (pll_loopdiv >> 8) & 0xff; /* MSB */
    st->buf[5] =  pll_loopdiv       & 0xff; /* LSB */
    st->buf[6] = (free_div >> 8)    & 0xff; /* MSB */
    st->buf[7] =  free_div          & 0xff; /* LSB */
    st->buf[8] = (dsuScaler >> 8)   & 0xff; /* MSB */
    st->buf[9] =  dsuScaler         & 0xff; /* LSB */

    ret = dib0700_ctrl_wr(d, st->buf, 10);
    mutex_unlock(&d->usb_mutex);

    return ret;
}

int dib0700_set_i2c_speed(struct dvb_usb_device *d, u16 scl_kHz)
{
    struct dib0700_state *st = d->priv;
    u16 divider;
    int ret;

    if (scl_kHz == 0)
        return -EINVAL;

    if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
        err("could not acquire lock");
        return -EINTR;
    }

    st->buf[0] = REQUEST_SET_I2C_PARAM;
    divider = (u16) (30000 / scl_kHz);
    st->buf[1] = 0;
    st->buf[2] = (u8) (divider >> 8);
    st->buf[3] = (u8) (divider & 0xff);
    divider = (u16) (72000 / scl_kHz);
    st->buf[4] = (u8) (divider >> 8);
    st->buf[5] = (u8) (divider & 0xff);
    divider = (u16) (72000 / scl_kHz); /* clock: 72MHz */
    st->buf[6] = (u8) (divider >> 8);
    st->buf[7] = (u8) (divider & 0xff);

    deb_info("setting I2C speed: %04x %04x %04x (%d kHz).",
        (st->buf[2] << 8) | (st->buf[3]), (st->buf[4] << 8) |
        st->buf[5], (st->buf[6] << 8) | st->buf[7], scl_kHz);

    ret = dib0700_ctrl_wr(d, st->buf, 8);
    mutex_unlock(&d->usb_mutex);

    return ret;
}


int dib0700_ctrl_clock(struct dvb_usb_device *d, u32 clk_MHz, u8 clock_out_gp3)
{
    switch (clk_MHz) {
        case 72: dib0700_set_clock(d, 1, 0, 1, clock_out_gp3, 2, 24, 0, 0x4c); break;
        default: return -EINVAL;
    }
    return 0;
}

static int dib0700_jumpram(struct usb_device *udev, u32 address)
{
    int ret = 0, actlen;
    u8 *buf;

    buf = kmalloc(8, GFP_KERNEL);
    if (!buf)
        return -ENOMEM;
    buf[0] = REQUEST_JUMPRAM;
    buf[1] = 0;
    buf[2] = 0;
    buf[3] = 0;
    buf[4] = (address >> 24) & 0xff;
    buf[5] = (address >> 16) & 0xff;
    buf[6] = (address >> 8)  & 0xff;
    buf[7] =  address        & 0xff;

    if ((ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, 0x01),buf,8,&actlen,1000)) < 0) {
        deb_fw("jumpram to 0x%x failed\n",address);
        goto out;
    }
    if (actlen != 8) {
        deb_fw("jumpram to 0x%x failed\n",address);
        ret = -EIO;
        goto out;
    }
out:
    kfree(buf);
    return ret;
}

int dib0700_download_firmware(struct usb_device *udev, const struct firmware *fw)
{
    struct hexline hx;
    int pos = 0, ret, act_len, i, adap_num;
    u8 *buf;
    u32 fw_version;

    buf = kmalloc(260, GFP_KERNEL);
    if (!buf)
        return -ENOMEM;

    while ((ret = dvb_usb_get_hexline(fw, &hx, &pos)) > 0) {
        deb_fwdata("writing to address 0x%08x (buffer: 0x%02x %02x)\n",
                hx.addr, hx.len, hx.chk);

        buf[0] = hx.len;
        buf[1] = (hx.addr >> 8) & 0xff;
        buf[2] =  hx.addr       & 0xff;
        buf[3] = hx.type;
        memcpy(&buf[4],hx.data,hx.len);
        buf[4+hx.len] = hx.chk;

        ret = usb_bulk_msg(udev,
            usb_sndbulkpipe(udev, 0x01),
            buf,
            hx.len + 5,
            &act_len,
            1000);

        if (ret < 0) {
            err("firmware download failed at %d with %d",pos,ret);
            goto out;
        }
    }

    if (ret == 0) {
        /* start the firmware */
        if ((ret = dib0700_jumpram(udev, 0x70000000)) == 0) {
            info("firmware started successfully.");
            msleep(500);
        }
    } else
        ret = -EIO;

    /* the number of ts packet has to be at least 1 */
    if (nb_packet_buffer_size < 1)
        nb_packet_buffer_size = 1;

    /* get the fimware version */
    usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
                  REQUEST_GET_VERSION,
                  USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
                  buf, 16, USB_CTRL_GET_TIMEOUT);
    fw_version = (buf[8] << 24) | (buf[9] << 16) | (buf[10] << 8) | buf[11];

    /* set the buffer size - DVB-USB is allocating URB buffers
     * only after the firwmare download was successful */
    for (i = 0; i < dib0700_device_count; i++) {
        for (adap_num = 0; adap_num < dib0700_devices[i].num_adapters;
                adap_num++) {
            if (fw_version >= 0x10201) {
                dib0700_devices[i].adapter[adap_num].fe[0].stream.u.bulk.buffersize = 188*nb_packet_buffer_size;
            } else {
                /* for fw version older than 1.20.1,
                 * the buffersize has to be n times 512 */
                dib0700_devices[i].adapter[adap_num].fe[0].stream.u.bulk.buffersize = ((188*nb_packet_buffer_size+188/2)/512)*512;
                if (dib0700_devices[i].adapter[adap_num].fe[0].stream.u.bulk.buffersize < 512)
                    dib0700_devices[i].adapter[adap_num].fe[0].stream.u.bulk.buffersize = 512;
            }
        }
    }
out:
    kfree(buf);
    return ret;
}

int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
{
    struct dib0700_state *st = adap->dev->priv;
    int ret;

    if ((onoff != 0) && (st->fw_version >= 0x10201)) {
        /* for firmware later than 1.20.1,
         * the USB xfer length can be set  */
        ret = dib0700_set_usb_xfer_len(adap->dev,
            st->nb_packet_buffer_size);
        if (ret < 0) {
            deb_info("can not set the USB xfer len\n");
            return ret;
        }
    }

    if (mutex_lock_interruptible(&adap->dev->usb_mutex) < 0) {
        err("could not acquire lock");
        return -EINTR;
    }

    st->buf[0] = REQUEST_ENABLE_VIDEO;
    /* this bit gives a kind of command,
     * rather than enabling something or not */
    st->buf[1] = (onoff << 4) | 0x00;

    if (st->disable_streaming_master_mode == 1)
        st->buf[2] = 0x00;
    else
        st->buf[2] = 0x01 << 4; /* Master mode */

    st->buf[3] = 0x00;

    deb_info("modifying (%d) streaming state for %d\n", onoff, adap->id);

    st->channel_state &= ~0x3;
    if ((adap->fe_adap[0].stream.props.endpoint != 2)
            && (adap->fe_adap[0].stream.props.endpoint != 3)) {
        deb_info("the endpoint number (%i) is not correct, use the adapter id instead", adap->fe_adap[0].stream.props.endpoint);
        if (onoff)
            st->channel_state |=    1 << (adap->id);
        else
            st->channel_state |=    1 << ~(adap->id);
    } else {
        if (onoff)
            st->channel_state |=    1 << (adap->fe_adap[0].stream.props.endpoint-2);
        else
            st->channel_state |=    1 << (3-adap->fe_adap[0].stream.props.endpoint);
    }

    st->buf[2] |= st->channel_state;

    deb_info("data for streaming: %x %x\n", st->buf[1], st->buf[2]);

    ret = dib0700_ctrl_wr(adap->dev, st->buf, 4);
    mutex_unlock(&adap->dev->usb_mutex);

    return ret;
}

int dib0700_change_protocol(struct rc_dev *rc, u64 rc_type)
{
    struct dvb_usb_device *d = rc->priv;
    struct dib0700_state *st = d->priv;
    int new_proto, ret;

    if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
        err("could not acquire lock");
        return -EINTR;
    }

    st->buf[0] = REQUEST_SET_RC;
    st->buf[1] = 0;
    st->buf[2] = 0;

    /* Set the IR mode */
    if (rc_type == RC_TYPE_RC5)
        new_proto = 1;
    else if (rc_type == RC_TYPE_NEC)
        new_proto = 0;
    else if (rc_type == RC_TYPE_RC6) {
        if (st->fw_version < 0x10200) {
            ret = -EINVAL;
            goto out;
        }

        new_proto = 2;
    } else {
        ret = -EINVAL;
        goto out;
    }

    st->buf[1] = new_proto;

    ret = dib0700_ctrl_wr(d, st->buf, 3);
    if (ret < 0) {
        err("ir protocol setup failed");
        goto out;
    }

    d->props.rc.core.protocol = rc_type;

out:
    mutex_unlock(&d->usb_mutex);
    return ret;
}

/* Number of keypresses to ignore before start repeating */
#define RC_REPEAT_DELAY_V1_20 10

/* This is the structure of the RC response packet starting in firmware 1.20 */
struct dib0700_rc_response {
    u8 report_id;
    u8 data_state;
    union {
        u16 system16;
        struct {
            u8 not_system;
            u8 system;
        };
    };
    u8 data;
    u8 not_data;
};
#define RC_MSG_SIZE_V1_20 6

static void dib0700_rc_urb_completion(struct urb *purb)
{
    struct dvb_usb_device *d = purb->context;
    struct dib0700_rc_response *poll_reply;
    u32 uninitialized_var(keycode);
    u8 toggle;

    deb_info("%s()\n", __func__);
    if (d->rc_dev == NULL) {
        /* This will occur if disable_rc_polling=1 */
        kfree(purb->transfer_buffer);
        usb_free_urb(purb);
        return;
    }

    poll_reply = purb->transfer_buffer;

    if (purb->status < 0) {
        deb_info("discontinuing polling\n");
        kfree(purb->transfer_buffer);
        usb_free_urb(purb);
        return;
    }

    if (purb->actual_length != RC_MSG_SIZE_V1_20) {
        deb_info("malformed rc msg size=%d\n", purb->actual_length);
        goto resubmit;
    }

    deb_data("IR ID = %02X state = %02X System = %02X %02X Cmd = %02X %02X (len %d)\n",
         poll_reply->report_id, poll_reply->data_state,
         poll_reply->system, poll_reply->not_system,
         poll_reply->data, poll_reply->not_data,
         purb->actual_length);

    switch (d->props.rc.core.protocol) {
    case RC_TYPE_NEC:
        toggle = 0;

        /* NEC protocol sends repeat code as 0 0 0 FF */
        if ((poll_reply->system == 0x00) && (poll_reply->data == 0x00)
            && (poll_reply->not_data == 0xff)) {
            poll_reply->data_state = 2;
            break;
        }

        if ((poll_reply->system ^ poll_reply->not_system) != 0xff) {
            deb_data("NEC extended protocol\n");
            /* NEC extended code - 24 bits */
            keycode = be16_to_cpu(poll_reply->system16) << 8 | poll_reply->data;
        } else {
            deb_data("NEC normal protocol\n");
            /* normal NEC code - 16 bits */
            keycode = poll_reply->system << 8 | poll_reply->data;
        }

        break;
    default:
        deb_data("RC5 protocol\n");
        /* RC5 Protocol */
        toggle = poll_reply->report_id;
        keycode = poll_reply->system << 8 | poll_reply->data;

        break;
    }

    if ((poll_reply->data + poll_reply->not_data) != 0xff) {
        /* Key failed integrity check */
        err("key failed integrity check: %04x %02x %02x",
            poll_reply->system,
            poll_reply->data, poll_reply->not_data);
        goto resubmit;
    }

    rc_keydown(d->rc_dev, keycode, toggle);

resubmit:
    /* Clean the buffer before we requeue */
    memset(purb->transfer_buffer, 0, RC_MSG_SIZE_V1_20);

    /* Requeue URB */
    usb_submit_urb(purb, GFP_ATOMIC);
}

int dib0700_rc_setup(struct dvb_usb_device *d)
{
    struct dib0700_state *st = d->priv;
    struct urb *purb;
    int ret;

    /* Poll-based. Don't initialize bulk mode */
    if (st->fw_version < 0x10200)
        return 0;

    /* Starting in firmware 1.20, the RC info is provided on a bulk pipe */
    purb = usb_alloc_urb(0, GFP_KERNEL);
    if (purb == NULL) {
        err("rc usb alloc urb failed");
        return -ENOMEM;
    }

    purb->transfer_buffer = kzalloc(RC_MSG_SIZE_V1_20, GFP_KERNEL);
    if (purb->transfer_buffer == NULL) {
        err("rc kzalloc failed");
        usb_free_urb(purb);
        return -ENOMEM;
    }

    purb->status = -EINPROGRESS;
    usb_fill_bulk_urb(purb, d->udev, usb_rcvbulkpipe(d->udev, 1),
              purb->transfer_buffer, RC_MSG_SIZE_V1_20,
              dib0700_rc_urb_completion, d);

    ret = usb_submit_urb(purb, GFP_ATOMIC);
    if (ret) {
        err("rc submit urb failed");
        kfree(purb->transfer_buffer);
        usb_free_urb(purb);
    }

    return ret;
}

static int dib0700_probe(struct usb_interface *intf,
        const struct usb_device_id *id)
{
    int i;
    struct dvb_usb_device *dev;

    for (i = 0; i < dib0700_device_count; i++)
        if (dvb_usb_device_init(intf, &dib0700_devices[i], THIS_MODULE,
            &dev, adapter_nr) == 0) {
            struct dib0700_state *st = dev->priv;
            u32 hwversion, romversion, fw_version, fwtype;

            dib0700_get_version(dev, &hwversion, &romversion,
                &fw_version, &fwtype);

            deb_info("Firmware version: %x, %d, 0x%x, %d\n",
                hwversion, romversion, fw_version, fwtype);

            st->fw_version = fw_version;
            st->nb_packet_buffer_size = (u32)nb_packet_buffer_size;

            /* Disable polling mode on newer firmwares */
            if (st->fw_version >= 0x10200)
                dev->props.rc.core.bulk_mode = true;
            else
                dev->props.rc.core.bulk_mode = false;

            dib0700_rc_setup(dev);

            return 0;
        }

    return -ENODEV;
}

static struct usb_driver dib0700_driver = {
    .name       = "dvb_usb_dib0700",
    .probe      = dib0700_probe,
    .disconnect = dvb_usb_device_exit,
    .id_table   = dib0700_usb_id_table,
};

module_usb_driver(dib0700_driver);

MODULE_FIRMWARE("dvb-usb-dib0700-1.20.fw");
MODULE_AUTHOR("Patrick Boettcher <[email protected]>");
MODULE_DESCRIPTION("Driver for devices based on DiBcom DiB0700 - USB bridge");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");