sf2r(4) [netbsd man page]
SF2R(4) BSD Kernel Interfaces Manual SF2R(4) NAME
sf2r -- SoundForte RadioLink SF16-FMR2 FM radio device driver SYNOPSIS
option RADIO_TEA5759 sf2r0 at isa? port 0x384 radio* at sf2r0 DESCRIPTION
The sf2r driver provides support for the SF16-FMR2 FM radio tuners. The SF16-FMR2 is a stereo FM tuner that allows to tune in the range 87.5 - 108.0 MHz, report signal status on the current frequency, force audio output to mono, perform hardware signal search, and has an internal AFC. The SF16-FMR2 cards take only one I/O port. The I/O port is set by the driver to the value specified in the configuration file and must be 0x384. Philips Semiconductors released two almost identical chips TEA5757 and TEA5759. The TEA5757 is used in FM-standards in which the local oscillator frequency is above the radio frequency (e.g. European and American standards). The TEA5759 is the version in which the oscillator frequency is below the radio frequency (e.g. Japanese standards). The option RADIO_TEA5759 changes the algorithm of frequency calculation for the TEA5757 based cards to conform with the Japanese standards. SEE ALSO
isa(4), radio(4) HISTORY
The sf2r device driver appeared in OpenBSD 3.0 and NetBSD 1.6. AUTHORS
The sf2r driver was written by Vladimir Popov and Maxim Tsyplakov. The man page was written by Vladimir Popov. BUGS
MediaForte made two variants of the SF16-FMR2 cards, the first one has an internal amplifier of the output sound, the second one does not have such an amplifier. The current driver supports only the second variant. BSD
October 8, 2001 BSD
Check Out this Related Man Page
RADIO(4) BSD Kernel Interfaces Manual RADIO(4) NAME
radio -- device-independent radio driver layer SYNOPSIS
radio* at az? radio* at bktr? radio* at gtp? radio* at rt? radio* at rtii? radio* at sf2r? radio* at udsbr? #include <sys/types.h> #include <sys/ioctl.h> #include <sys/radioio.h> DESCRIPTION
The radio driver provides support for various FM radio cards. It provides an uniform programming interface layer above different underlying radio hardware drivers. For radio tuner controlling there is a single device file available: /dev/radio. The following ioctl(2) commands are supported: 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. RIOCGINFO (struct radio_info) RIOCSINFO (struct radio_info) Get or set the current hardware device information into the struct radio_info structure. struct radio_info { int mute; int volume; int stereo; int rfreq; /* reference frequency */ int lock; /* locking field strength */ uint32_t freq; /* in kHz */ uint32_t caps; /* card capabilities */ #define RADIO_CAPS_DETECT_STEREO (1<<0) #define RADIO_CAPS_DETECT_SIGNAL (1<<1) #define RADIO_CAPS_SET_MONO (1<<2) #define RADIO_CAPS_HW_SEARCH (1<<3) #define RADIO_CAPS_HW_AFC (1<<4) #define RADIO_CAPS_REFERENCE_FREQ (1<<5) #define RADIO_CAPS_LOCK_SENSITIVITY (1<<6) #define RADIO_CARD_TYPE (0xFF<<16) uint32_t info; #define RADIO_INFO_STEREO (1<<0) #define RADIO_INFO_SIGNAL (1<<1) }; The mute field is a boolean. The volume field holds the card volume information and can be at most 255. The stereo field is a boolean. The rfreq holds information about the card reference frequency (not all cards support this feature). The lock field holds information about the card locking field strength during an automatic search for cards that support this fea- ture. The freq field is the frequency in kHz the card is tuned to. The caps field is read-only and describes the card capabilities. The capabilities can have following values: RADIO_CAPS_DETECT_STEREO The device can determine is it tuned to a stereo signal. RADIO_CAPS_DETECT_SIGNAL The device can determine is it tuned or not. RADIO_CAPS_SET_MONO The device capable to forcible set its output to mono. RADIO_CAPS_HW_SEARCH The device can do hardware search. RADIO_CAPS_HW_AFC The device has an internal hardware automatic frequency control. RADIO_CAPS_REFERENCE_FREQ The device allow to change the reference frequency of a received signal. RADIO_CAPS_LOCK_SENSITIVITY The device allow to change the station lock sensitivity used during search operation. RADIO_CARD_TYPE Some cards have several different incarnations. This allow to determine the variant of the card. Currently not used. The info field is read-only and describes the current state of the card - tuned/not tuned, stereo signal/mono signal. RADIO_INFO_STEREO Informs whether the device receives a stereo or mono signal. RADIO_INFO_SIGNAL Informs whether the device receives a valid signal or noise. FILES
/dev/radio SEE ALSO
radioctl(1), ioctl(2), az(4), bktr(4), gtp(4), rt(4), rtii(4), sf2r(4), udsbr(4) HISTORY
The radio device driver appeared in OpenBSD 3.0 and NetBSD 1.6. AUTHORS
The radio driver was written by Vladimir Popov and Maxim Tsyplakov. The man page was written by Vladimir Popov. BSD
October 20, 2001 BSD