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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\n", __func__, -EINVAL);
- return -EINVAL;
- }
- dev_dbg(&d->udev->dev, "%s: >>> %*ph\n", __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\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)
- dev_err(&d->udev->dev,
- "%s: 2nd usb_bulk_msg() failed=%d\n",
- KBUILD_MODNAME, ret);
- dev_dbg(&d->udev->dev, "%s: <<< %*ph\n", __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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