180 lines
5.3 KiB
Groff
180 lines
5.3 KiB
Groff
.\" $NetBSD: radio.4,v 1.10 2003/12/16 11:31:04 wiz Exp $
|
|
.\" $RuOBSD: radio.4,v 1.4 2001/10/26 05:38:43 form Exp $
|
|
.\" $OpenBSD: radio.4,v 1.3 2001/12/05 10:58:54 mickey Exp $
|
|
.\"
|
|
.\" Copyright (c) 2001 Vladimir Popov
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
|
.\" USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
|
.\" ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.Dd October 20, 2001
|
|
.Dt RADIO 4
|
|
.Os
|
|
.Sh NAME
|
|
.Nm radio
|
|
.Nd device-independent radio driver layer
|
|
.Sh SYNOPSIS
|
|
.Cd "radio* at az?"
|
|
.Cd "radio* at bktr?"
|
|
.Cd "radio* at mr?"
|
|
.Cd "radio* at rt?"
|
|
.Cd "radio* at rtii?"
|
|
.Cd "radio* at sf2r?"
|
|
.Cd "radio* at udsbr?"
|
|
.Pp
|
|
.In sys/types.h
|
|
.In sys/ioctl.h
|
|
.In sys/radioio.h
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
driver provides support for various FM radio cards.
|
|
It provides an uniform programming interface layer above different underlying
|
|
radio hardware drivers.
|
|
.Pp
|
|
For radio tuner controlling there is a single device file available:
|
|
.Pa /dev/radio .
|
|
.Pp
|
|
The following
|
|
.Xr ioctl 2
|
|
commands are supported:
|
|
.Pp
|
|
.Bl -tag -width indent -compact
|
|
.It Dv RIOCSSRCH (int)
|
|
This command assumes that a signal search is required and gives direction
|
|
of search to the driver \- 0 to search down and any non-zero value to search up.
|
|
.It Dv RIOCGINFO (struct radio_info)
|
|
.It Dv RIOCSINFO (struct radio_info)
|
|
Get or set the current hardware device information into the struct radio_info
|
|
structure.
|
|
.Bd -literal
|
|
struct radio_info {
|
|
int mute;
|
|
int volume;
|
|
int stereo;
|
|
int rfreq; /* reference frequency */
|
|
int lock; /* locking field strength */
|
|
u_int32_t freq; /* in kHz */
|
|
u_int32_t caps; /* card capabilities */
|
|
#define RADIO_CAPS_DETECT_STEREO (1\*[Lt]\*[Lt]0)
|
|
#define RADIO_CAPS_DETECT_SIGNAL (1\*[Lt]\*[Lt]1)
|
|
#define RADIO_CAPS_SET_MONO (1\*[Lt]\*[Lt]2)
|
|
#define RADIO_CAPS_HW_SEARCH (1\*[Lt]\*[Lt]3)
|
|
#define RADIO_CAPS_HW_AFC (1\*[Lt]\*[Lt]4)
|
|
#define RADIO_CAPS_REFERENCE_FREQ (1\*[Lt]\*[Lt]5)
|
|
#define RADIO_CAPS_LOCK_SENSITIVITY (1\*[Lt]\*[Lt]6)
|
|
#define RADIO_CARD_TYPE (0xFF\*[Lt]\*[Lt]16)
|
|
u_int32_t info;
|
|
#define RADIO_INFO_STEREO (1\*[Lt]\*[Lt]0)
|
|
#define RADIO_INFO_SIGNAL (1\*[Lt]\*[Lt]1)
|
|
};
|
|
.Ed
|
|
.Pp
|
|
The
|
|
.Va mute
|
|
field is a boolean.
|
|
.Pp
|
|
The
|
|
.Va volume
|
|
field holds the card volume information and can be at most 255.
|
|
.Pp
|
|
The
|
|
.Va stereo
|
|
field is a boolean.
|
|
.Pp
|
|
The
|
|
.Va rfreq
|
|
holds information about the card reference frequency (not all cards support
|
|
this feature).
|
|
.Pp
|
|
The
|
|
.Va lock
|
|
field holds information about the card locking field strength during
|
|
an automatic search for cards that support this feature.
|
|
.Pp
|
|
The
|
|
.Va freq
|
|
field is the frequency in kHz the card is tuned to.
|
|
.Pp
|
|
The
|
|
.Va caps
|
|
field is read-only and describes the card capabilities.
|
|
The capabilities can have following values:
|
|
.Bl -tag -width indent -compact
|
|
.It Dv RADIO_CAPS_DETECT_STEREO
|
|
The device can determine is it tuned to a stereo signal.
|
|
.It Dv RADIO_CAPS_DETECT_SIGNAL
|
|
The device can determine is it tuned or not.
|
|
.It Dv RADIO_CAPS_SET_MONO
|
|
The device capable to forcible set its output to mono.
|
|
.It Dv RADIO_CAPS_HW_SEARCH
|
|
The device can do hardware search.
|
|
.It Dv RADIO_CAPS_HW_AFC
|
|
The device has an internal hardware automatic frequency control.
|
|
.It Dv RADIO_CAPS_REFERENCE_FREQ
|
|
The device allow to change the reference frequency of a received signal.
|
|
.It Dv RADIO_CAPS_LOCK_SENSITIVITY
|
|
The device allow to change the station lock sensitivity used during search
|
|
operation.
|
|
.It Dv RADIO_CARD_TYPE
|
|
Some cards have several different incarnations.
|
|
This allow to determine the variant of the card.
|
|
Currently not used.
|
|
.El
|
|
.Pp
|
|
The
|
|
.Va info
|
|
field is read-only and describes the current state of the card \-
|
|
tuned/not tuned, stereo signal/mono signal.
|
|
.Bl -tag -width indent -compact
|
|
.It Dv RADIO_INFO_STEREO
|
|
Informs whether the device receives a stereo or mono signal.
|
|
.It Dv RADIO_INFO_SIGNAL
|
|
Informs whether the device receives a valid signal or noise.
|
|
.El
|
|
.El
|
|
.Sh FILES
|
|
.Bl -tag -width /dev/radio -compact
|
|
.It Pa /dev/radio
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr radioctl 1 ,
|
|
.Xr ioctl 2 ,
|
|
.Xr az 4 ,
|
|
.Xr bktr 4 ,
|
|
.Xr mr 4 ,
|
|
.Xr rt 4 ,
|
|
.Xr rtii 4 ,
|
|
.Xr sf2r 4 ,
|
|
.Xr udsbr 4
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
device driver appeared in
|
|
.Ox 3.0
|
|
and
|
|
.Nx 1.6 .
|
|
.Sh AUTHORS
|
|
The
|
|
.Nm
|
|
driver was written by Vladimir Popov and Maxim Tsyplakov.
|
|
The man page was written by Vladimir Popov.
|