1.\" $NetBSD: sf2r.4,v 1.5 2002/01/02 02:14:48 wiz Exp $ 2.\" $RuOBSD: sf2r.4,v 1.3 2001/10/26 05:38:44 form Exp $ 3.\" $OpenBSD: sf2r.4,v 1.2 2001/12/05 11:27:44 mickey Exp $ 4.\" 5.\" Copyright (c) 2001 Vladimir Popov 6.\" All rights reserved. 7.\" 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following conditions 10.\" are met: 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 2. Redistributions in binary form must reproduce the above copyright 14.\" notice, this list of conditions and the following disclaimer in the 15.\" documentation and/or other materials provided with the distribution. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 22.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 23.\" USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 24.\" ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27.\" 28.Dd October 8, 2001 29.Dt SF2R 4 30.Os 31.Sh NAME 32.Nm sf2r 33.Nd SoundForte RadioLink SF16-FMR2 FM radio device driver 34.Sh SYNOPSIS 35.Cd option RADIO_TEA5759 36.Pp 37.Cd "sf2r0 at isa? port 0x384" 38.Cd "radio* at sf2r0" 39.Sh DESCRIPTION 40The 41.Nm 42driver provides support for the SF16-FMR2 FM radio tuners. 43.Pp 44The SF16-FMR2 is a stereo FM tuner that allows to tune in the range 4587.5 - 108.0 MHz, report signal status on the current frequency, force 46audio output to mono, perform hardware signal search, and has an internal 47AFC. 48.Pp 49The SF16-FMR2 cards take only one I/O port. 50The I/O port is set by the driver to the value specified in the configuration 51file and must be 0x384. 52.Pp 53Philips Semiconductors released two almost identical chips TEA5757 and 54TEA5759. 55The TEA5757 is used in FM-standards in which the local oscillator frequency 56is above the radio frequency (e.g. European and American standards). 57The TEA5759 is the version in which the oscillator frequency is below 58the radio frequency (e.g. Japanese standards). 59The option 60.Va RADIO_TEA5759 61changes the algorithm of frequency calculation for the TEA5757 based cards 62to conform with the Japanese standards. 63.Sh SEE ALSO 64.Xr isa 4 , 65.Xr radio 4 66.Sh HISTORY 67The 68.Nm 69device driver appeared in 70.Ox 3.0 71and 72.Nx 1.6 . 73.Sh AUTHORS 74The 75.Nm 76driver was written by Vladimir Popov and Maxim Tsyplakov. 77The man page was written by Vladimir Popov. 78.Sh BUGS 79MediaForte made two variants of the SF16-FMR2 cards, the first one has 80an internal amplifier of the output sound, the second one does not have 81such an amplifier. 82The current driver supports only the second variant. 83