97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* DVB USB framework
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*
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* Copyright (C) 2004-6 Patrick Boettcher <patrick.boettcher@posteo.de>
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* Copyright (C) 2012 Antti Palosaari <crope@iki.fi>
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*/
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#include "dvb_usb_common.h"
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static int dvb_usb_v2_generic_io(struct dvb_usb_device *d,
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u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
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{
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int ret, actual_length;
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if (!wbuf || !wlen || !d->props->generic_bulk_ctrl_endpoint ||
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!d->props->generic_bulk_ctrl_endpoint_response) {
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dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, -EINVAL);
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return -EINVAL;
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}
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dev_dbg(&d->udev->dev, "%s: >>> %*ph\n", __func__, wlen, wbuf);
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ret = usb_bulk_msg(d->udev, usb_sndbulkpipe(d->udev,
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d->props->generic_bulk_ctrl_endpoint), wbuf, wlen,
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&actual_length, 2000);
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if (ret) {
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dev_err(&d->udev->dev, "%s: usb_bulk_msg() failed=%d\n",
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KBUILD_MODNAME, ret);
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return ret;
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}
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if (actual_length != wlen) {
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dev_err(&d->udev->dev, "%s: usb_bulk_msg() write length=%d, actual=%d\n",
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KBUILD_MODNAME, wlen, actual_length);
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return -EIO;
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}
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/* an answer is expected */
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if (rbuf && rlen) {
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if (d->props->generic_bulk_ctrl_delay)
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usleep_range(d->props->generic_bulk_ctrl_delay,
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d->props->generic_bulk_ctrl_delay
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+ 20000);
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ret = usb_bulk_msg(d->udev, usb_rcvbulkpipe(d->udev,
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d->props->generic_bulk_ctrl_endpoint_response),
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rbuf, rlen, &actual_length, 2000);
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if (ret)
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dev_err(&d->udev->dev,
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"%s: 2nd usb_bulk_msg() failed=%d\n",
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KBUILD_MODNAME, ret);
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dev_dbg(&d->udev->dev, "%s: <<< %*ph\n", __func__,
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actual_length, rbuf);
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}
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return ret;
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}
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int dvb_usbv2_generic_rw(struct dvb_usb_device *d,
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u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
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{
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int ret;
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mutex_lock(&d->usb_mutex);
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ret = dvb_usb_v2_generic_io(d, wbuf, wlen, rbuf, rlen);
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mutex_unlock(&d->usb_mutex);
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return ret;
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}
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EXPORT_SYMBOL(dvb_usbv2_generic_rw);
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int dvb_usbv2_generic_write(struct dvb_usb_device *d, u8 *buf, u16 len)
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{
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int ret;
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mutex_lock(&d->usb_mutex);
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ret = dvb_usb_v2_generic_io(d, buf, len, NULL, 0);
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mutex_unlock(&d->usb_mutex);
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return ret;
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}
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EXPORT_SYMBOL(dvb_usbv2_generic_write);
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int dvb_usbv2_generic_rw_locked(struct dvb_usb_device *d,
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u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
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{
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return dvb_usb_v2_generic_io(d, wbuf, wlen, rbuf, rlen);
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}
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EXPORT_SYMBOL(dvb_usbv2_generic_rw_locked);
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int dvb_usbv2_generic_write_locked(struct dvb_usb_device *d, u8 *buf, u16 len)
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{
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return dvb_usb_v2_generic_io(d, buf, len, NULL, 0);
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}
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EXPORT_SYMBOL(dvb_usbv2_generic_write_locked);
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