sbni —
Granch
SBNI12 leased line modem driver
device sbni
The
sbni driver provides support for leased line
modems of following models:
- SBNI12-02, SBNI12D-02
- SBNI12-04, SBNI12D-04
- SBNI12-05, SBNI12D-05, ISA and PCI
- SBNI12-10, SBNI12D-10, ISA and PCI
and a kit for data link over a voice band:
- SBNI12-11, SBNI12D-11, ISA and PCI.
In addition to the standard port and IRQ specifications, the
sbni driver also supports a number of
flags which can set baud rate, receive level,
and low three bytes of Ethernet MAC-address (high three are always
00:ff:01), because Granch modems are presented to the
system as Ethernet-like network cards.
The high byte of the
flags is a bit field, it
is used to specify SBNI adapter receive level/baud rate:
- Bits 0-3:
- receive level (0x00..0x0f)
- Bits 4-5:
- baud rate number:
- 00 -
- 0 baud rate (2Mb in fast mode/500kb in slow)
- 01 -
- 1 baud rate (1Mb/250kb)
- 10 -
- 2 baud rate (500kb/125kb)
- 11 -
- 3 baud rate (250kb/62.5kb)
- Bit 6:
- use fixed receive level
if bit 6 is set then receive level will be set according to bits 0-3 value,
otherwise receive level will be autodetected
- Bit 7:
- use fixed baud rate
if bit 7 is set then baud rate will be set according to bits 4-5 value,
otherwise baud rate is set to 2Mb
The sources for the driver reside in:
- /sys/dev/sbni/if_sbni.c
-
- /sys/dev/sbni/if_sbnireg.h
-
- /sys/dev/sbni/if_sbnivar.h
-
arp(4),
netintro(4),
ifconfig(8)
The
sbni device driver first appeared in
FreeBSD 4.6.
The
sbni device driver for
FreeBSD 4.x was written by
Denis I. Timofeev, partially based on
David Greenman's
ed(4) driver. Earlier versions (available on
ftp.granch.com) were written by
Alexey V. Zverev.
SBNI12 hardware was designed by
Alexey V.
Chirkov.