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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * DVB USB framework4 *5 * Copyright (C) 2004-6 Patrick Boettcher <patrick.boettcher@posteo.de>6 * Copyright (C) 2012 Antti Palosaari <crope@iki.fi>7 */8 9#include "dvb_usb_common.h"10 11static int dvb_usb_v2_generic_io(struct dvb_usb_device *d,12 u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)13{14 int ret, actual_length;15 16 if (!wbuf || !wlen || !d->props->generic_bulk_ctrl_endpoint ||17 !d->props->generic_bulk_ctrl_endpoint_response) {18 dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, -EINVAL);19 return -EINVAL;20 }21 22 dev_dbg(&d->udev->dev, "%s: >>> %*ph\n", __func__, wlen, wbuf);23 24 ret = usb_bulk_msg(d->udev, usb_sndbulkpipe(d->udev,25 d->props->generic_bulk_ctrl_endpoint), wbuf, wlen,26 &actual_length, 2000);27 if (ret) {28 dev_err(&d->udev->dev, "%s: usb_bulk_msg() failed=%d\n",29 KBUILD_MODNAME, ret);30 return ret;31 }32 if (actual_length != wlen) {33 dev_err(&d->udev->dev, "%s: usb_bulk_msg() write length=%d, actual=%d\n",34 KBUILD_MODNAME, wlen, actual_length);35 return -EIO;36 }37 38 /* an answer is expected */39 if (rbuf && rlen) {40 if (d->props->generic_bulk_ctrl_delay)41 usleep_range(d->props->generic_bulk_ctrl_delay,42 d->props->generic_bulk_ctrl_delay43 + 20000);44 45 ret = usb_bulk_msg(d->udev, usb_rcvbulkpipe(d->udev,46 d->props->generic_bulk_ctrl_endpoint_response),47 rbuf, rlen, &actual_length, 2000);48 if (ret)49 dev_err(&d->udev->dev,50 "%s: 2nd usb_bulk_msg() failed=%d\n",51 KBUILD_MODNAME, ret);52 53 dev_dbg(&d->udev->dev, "%s: <<< %*ph\n", __func__,54 actual_length, rbuf);55 }56 57 return ret;58}59 60int dvb_usbv2_generic_rw(struct dvb_usb_device *d,61 u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)62{63 int ret;64 65 mutex_lock(&d->usb_mutex);66 ret = dvb_usb_v2_generic_io(d, wbuf, wlen, rbuf, rlen);67 mutex_unlock(&d->usb_mutex);68 69 return ret;70}71EXPORT_SYMBOL(dvb_usbv2_generic_rw);72 73int dvb_usbv2_generic_write(struct dvb_usb_device *d, u8 *buf, u16 len)74{75 int ret;76 77 mutex_lock(&d->usb_mutex);78 ret = dvb_usb_v2_generic_io(d, buf, len, NULL, 0);79 mutex_unlock(&d->usb_mutex);80 81 return ret;82}83EXPORT_SYMBOL(dvb_usbv2_generic_write);84 85int dvb_usbv2_generic_rw_locked(struct dvb_usb_device *d,86 u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)87{88 return dvb_usb_v2_generic_io(d, wbuf, wlen, rbuf, rlen);89}90EXPORT_SYMBOL(dvb_usbv2_generic_rw_locked);91 92int dvb_usbv2_generic_write_locked(struct dvb_usb_device *d, u8 *buf, u16 len)93{94 return dvb_usb_v2_generic_io(d, buf, len, NULL, 0);95}96EXPORT_SYMBOL(dvb_usbv2_generic_write_locked);97