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dvb-usb-urb.c

/* dvb-usb-urb.c is part of the DVB USB library.
 *
 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
 * see dvb-usb-init.c for copyright information.
 *
 * This file keeps functions for initializing and handling the
 * USB and URB stuff.
 */
#include "dvb-usb-common.h"

int dvb_usb_generic_rw(struct dvb_usb_device *d, u8 *wbuf, u16 wlen, u8 *rbuf,
      u16 rlen, int delay_ms)
{
      int actlen,ret = -ENOMEM;

      if (d->props.generic_bulk_ctrl_endpoint == 0) {
            err("endpoint for generic control not specified.");
            return -EINVAL;
      }

      if (wbuf == NULL || wlen == 0)
            return -EINVAL;

      if ((ret = mutex_lock_interruptible(&d->usb_mutex)))
            return ret;

      deb_xfer(">>> ");
      debug_dump(wbuf,wlen,deb_xfer);

      ret = usb_bulk_msg(d->udev,usb_sndbulkpipe(d->udev,
                  d->props.generic_bulk_ctrl_endpoint), wbuf,wlen,&actlen,
                  2000);

      if (ret)
            err("bulk message failed: %d (%d/%d)",ret,wlen,actlen);
      else
            ret = actlen != wlen ? -1 : 0;

      /* an answer is expected, and no error before */
      if (!ret && rbuf && rlen) {
            if (delay_ms)
                  msleep(delay_ms);

            ret = usb_bulk_msg(d->udev,usb_rcvbulkpipe(d->udev,
                        d->props.generic_bulk_ctrl_endpoint),rbuf,rlen,&actlen,
                        2000);

            if (ret)
                  err("recv bulk message failed: %d",ret);
            else {
                  deb_xfer("<<< ");
                  debug_dump(rbuf,actlen,deb_xfer);
            }
      }

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

int dvb_usb_generic_write(struct dvb_usb_device *d, u8 *buf, u16 len)
{
      return dvb_usb_generic_rw(d,buf,len,NULL,0,0);
}
EXPORT_SYMBOL(dvb_usb_generic_write);

static void dvb_usb_data_complete(struct usb_data_stream *stream, u8 *buffer, size_t length)
{
      struct dvb_usb_adapter *adap = stream->user_priv;
      if (adap->feedcount > 0 && adap->state & DVB_USB_ADAP_STATE_DVB)
            dvb_dmx_swfilter(&adap->demux, buffer, length);
}

static void dvb_usb_data_complete_204(struct usb_data_stream *stream, u8 *buffer, size_t length)
{
      struct dvb_usb_adapter *adap = stream->user_priv;
      if (adap->feedcount > 0 && adap->state & DVB_USB_ADAP_STATE_DVB)
            dvb_dmx_swfilter_204(&adap->demux, buffer, length);
}

int dvb_usb_adapter_stream_init(struct dvb_usb_adapter *adap)
{
      adap->stream.udev      = adap->dev->udev;
      if (adap->props.caps & DVB_USB_ADAP_RECEIVES_204_BYTE_TS)
            adap->stream.complete = dvb_usb_data_complete_204;
      else
      adap->stream.complete  = dvb_usb_data_complete;
      adap->stream.user_priv = adap;
      return usb_urb_init(&adap->stream, &adap->props.stream);
}

int dvb_usb_adapter_stream_exit(struct dvb_usb_adapter *adap)
{
      return usb_urb_exit(&adap->stream);
}

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