sr(4)

NAME

sr - synchronous RISCom/N2 / WANic 400/405 device driver

SYNOPSIS

device sr
For ISA cards, in /boot/device.hints:
hint.sr.0.at="isa"
hint.sr.0.port="0x300"
hint.sr.0.irq="10"
hint.sr.0.maddr="0xd0000"
hint.sr.0.flags="0x0"
device sppp

DESCRIPTION

The sr driver supports the RISCom/N2 ISA cards, N2pci and

the WANic
400/405 PCI cards that are based on the HD64570 chip.

If you have ISA cards, you need to specify the resources for

them in
/boot/device.hints. If you have the second ISA card, add

hint.sr.1.at="isa"
hint.sr.1.port="0x310"
hint.sr.1.irq="11"
hint.sr.1.maddr="0xd0000"
hint.sr.1.flags="0x0"

The standard FreeBSD sppp code is used for the link level

layer. The
default protocol used is PPP. The Cisco HDLC protocol can

be used by
adding link2 to ifconfig(8).

Alternately, the driver can be compiled to support net

graph(4) (see
below).

The flags specification in /boot/device.hints is optional.

If it is not
specified, the driver will assume the following:

The card has 2 ports.

The clock for the serial ports is external and the

transmitter uses

the same clock as the receiver.

The flags are a bit field and can be used to force a differ

ent behaviour
than the default.

0x01 The card has only one port.

0x10 Use separate external clocks for transmit and

receive on

port 0.

0x40 Use separate external clocks for transmit and

receive on

port 1.

The card only supports IRQ 3, 4, 5, 7, 10, 11, 12 and 15.

The iomem area is a 16Kb block and must start at a 16Kb

boundary.

HARDWARE

The sr driver supports the following hardware:

+o SDL Communications RISCom/N2 ISA
+o SDL Communications N2pci
+o SDL Communications WANic 400/405 PCI

NETGRAPH SUPPORT

If the kernel is compiled with options NETGRAPH then the

sppp and Cisco
HDLC modes are disabled (and the sppp driver is unneeded),

and this
driver functions as a netgraph(4) node with a single hook

named rawdata.
Connecting to this hook enables the transmission of raw HDLC

frames. The
node will have the same name as the device with ``sync_''

prepended,
e.g., sync_sr0.

DIAGNOSTICS

sr%d: Warning illegal interrupt %d. The card cannot use the

specified
interrupt. Choose a different one.

SEE ALSO

ar(4), cx(4), netgraph(4), netintro(4), ifconfig(8)

AUTHORS

The sr device driver was written by John Hay <jhay@FreeB

SD.org>.

Netgraph support was added by Julian Elischer <julian@FreeB

SD.org>.

BUGS

At the moment only the X.21 interface is tested. The others

may need
tweaks to the clock selection code.

The code can probably stand some optimizing.

BSD March 18, 2005

BSD