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kernel add
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/*
* DVB USB framework
*
* Copyright (C) 2004-6 Patrick Boettcher <patrick.boettcher@desy.de>
* Copyright (C) 2012 Antti Palosaari <crope@iki.fi>
*
* 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 distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "dvb_usb_common.h"
static int dvb_usb_v2_generic_io(struct dvb_usb_device *d,
u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
{
int ret, actual_length;
if (!wbuf || !wlen || !d->props->generic_bulk_ctrl_endpoint ||
!d->props->generic_bulk_ctrl_endpoint_response) {
dev_dbg(&d->udev->dev, "%s: failed=%d
", __func__, -EINVAL);
return -EINVAL;
}
dev_dbg(&d->udev->dev, "%s: >>> %*ph
", __func__, wlen, wbuf);
ret = usb_bulk_msg(d->udev, usb_sndbulkpipe(d->udev,
d->props->generic_bulk_ctrl_endpoint), wbuf, wlen,
&actual_length, 2000);
if (ret < 0)
dev_err(&d->udev->dev, "%s: usb_bulk_msg() failed=%d
",
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)
dev_err(&d->udev->dev,
"%s: 2nd usb_bulk_msg() failed=%d
",
KBUILD_MODNAME, ret);
dev_dbg(&d->udev->dev, "%s: <<< %*ph
", __func__,
actual_length, rbuf);
}
return ret;
}
int dvb_usbv2_generic_rw(struct dvb_usb_device *d,
u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
{
int ret;
mutex_lock(&d->usb_mutex);
ret = dvb_usb_v2_generic_io(d, wbuf, wlen, rbuf, rlen);
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)
{
int ret;
mutex_lock(&d->usb_mutex);
ret = dvb_usb_v2_generic_io(d, buf, len, NULL, 0);
mutex_unlock(&d->usb_mutex);
return ret;
}
EXPORT_SYMBOL(dvb_usbv2_generic_write);
int dvb_usbv2_generic_rw_locked(struct dvb_usb_device *d,
u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
{
return dvb_usb_v2_generic_io(d, wbuf, wlen, rbuf, rlen);
}
EXPORT_SYMBOL(dvb_usbv2_generic_rw_locked);
int dvb_usbv2_generic_write_locked(struct dvb_usb_device *d, u8 *buf, u16 len)
{
return dvb_usb_v2_generic_io(d, buf, len, NULL, 0);
}
EXPORT_SYMBOL(dvb_usbv2_generic_write_locked);
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