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Based on 2 normalized pattern(s): 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 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 [no]_[pad]_[ctrl] 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 176 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154040.652910950@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
// 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 < 0)
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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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else
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ret = actual_length != wlen ? -EIO : 0;
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/* an answer is expected, and no error before */
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if (!ret && 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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