1.\" Copyright (c) 2013, 2016 Adrian Chadd <adrian@freebsd.org> 2.\" Copyright (c) 2019 Vladimir Kondratyev <wulf@FreeBSD.org> 3.\" Copyright (c) 2023 Future Crew LLC. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.Dd July 15, 2025 27.Dt RTLBTFW 8 28.Os 29.Sh NAME 30.Nm rtlbtfw 31.Nd load firmware for Realtek 87XX/88XX Bluetooth USB devices 32.Sh SYNOPSIS 33.Nm 34.Fl d Ar device_name 35.Fl f Ar firmware_path 36.Nm 37.Fl h 38.Sh DESCRIPTION 39The 40.Nm 41utility downloads the specified firmware file to the specified 42.Xr ugen 4 43device. 44.Pp 45This utility will 46.Em only 47work with Realtek 87XX/88XX chip based Bluetooth USB devices and some of 48their successors. 49The identification is currently based on USB vendor ID/product ID pair and 50interface class. 51For Realtek devices the vendor ID should be 0x0bda 52.Pq Dv USB_VENDOR_REALTEK 53and the 0-th interface class/subclass/protocol should be a Bluetooth RF 54Wireless Controller. 55Non-Realtek devices are identified based on USB vendor ID/product ID pair. 56.Pp 57Firmware files are available in the 58.Pa comms/rtlbt-firmware 59port. 60.Pp 61The 62.Nm 63utility will query the device to determine which firmware image and board 64configuration to load in at runtime. 65.Pp 66The options are as follows: 67.Bl -tag -width indent 68.It Fl D 69Enable verbose debugging. 70.It Fl d Ar device_name 71Specify 72.Xr ugen 4 73device name. 74.It Fl I 75Enable informational debugging. 76.It Fl f Ar firmware_path 77Specify the directory containing the firmware files to search and upload. 78.It Fl h 79Display usage message and exit. 80.El 81.Sh EXIT STATUS 82.Ex -std 83.Sh SEE ALSO 84.Xr libusb 3 , 85.Xr ng_ubt 4 , 86.Xr ugen 4 , 87.Xr devd 8 88.Sh AUTHORS 89.Nm 90is based on 91.Xr ath3kfw 8 92utility used as firmware downloader template and on Linux btrtl driver 93source code. 94It is written by 95.An Vladimir Kondratyev Aq Mt wulf@FreeBSD.org 96under sponsorship from Future Crew LLC. 97.Sh BUGS 98Most likely. 99Please report if found. 100