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/* 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"
#undef DVB_USB_XFER_DEBUG
int dvb_usbv2_generic_rw(struct dvb_usb_device *d, u8 *wbuf, u16 wlen, u8 *rbuf,
u16 rlen)
{
int ret, actual_length;
if (!d || !wbuf || !wlen || !d->props->generic_bulk_ctrl_endpoint ||
!d->props->generic_bulk_ctrl_endpoint_response) {
pr_debug("%s: failed=%d\n", __func__, -EINVAL);
return -EINVAL;
}
ret = mutex_lock_interruptible(&d->usb_mutex);
if (ret < 0)
return ret;
#ifdef DVB_USB_XFER_DEBUG
print_hex_dump(KERN_DEBUG, KBUILD_MODNAME ": >>> ", DUMP_PREFIX_NONE,
32, 1, wbuf, wlen, 0);
#endif
ret = usb_bulk_msg(d->udev, usb_sndbulkpipe(d->udev,
d->props->generic_bulk_ctrl_endpoint), wbuf, wlen,
&actual_length, 2000);
if (ret < 0)
pr_err("%s: usb_bulk_msg() failed=%d\n", KBUILD_MODNAME, ret);
else
ret = actual_length != wlen ? -EIO : 0;
/* an answer is expected, and no error before */
if (!ret && rbuf && rlen) {
if (d->props->generic_bulk_ctrl_delay)
usleep_range(d->props->generic_bulk_ctrl_delay,
d->props->generic_bulk_ctrl_delay
+ 20000);
ret = usb_bulk_msg(d->udev, usb_rcvbulkpipe(d->udev,
d->props->generic_bulk_ctrl_endpoint_response),
rbuf, rlen, &actual_length, 2000);
if (ret)
pr_err("%s: 2nd usb_bulk_msg() failed=%d\n",
KBUILD_MODNAME, ret);
#ifdef DVB_USB_XFER_DEBUG
print_hex_dump(KERN_DEBUG, KBUILD_MODNAME ": <<< ",
DUMP_PREFIX_NONE, 32, 1, rbuf, actual_length,
0);
#endif
}
mutex_unlock(&d->usb_mutex);
return ret;
}
EXPORT_SYMBOL(dvb_usbv2_generic_rw);
int dvb_usbv2_generic_write(struct dvb_usb_device *d, u8 *buf, u16 len)
{
return dvb_usbv2_generic_rw(d, buf, len, NULL, 0);
}
EXPORT_SYMBOL(dvb_usbv2_generic_write);
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