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

CONTENTS

Synopsis
Description
Hardware
Netgraph Support
Diagnostics
See Also
Authors
Bugs

.Cd device sr

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

.Cd device sppp

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
.Fx 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 netgraph(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 different 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.

The sr driver supports the following hardware:

• SDL Communications RISCom/N2 ISA
• SDL Communications N2pci
• SDL Communications WANic 400/405 PCI

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.

sr%d: Warning illegal interrupt %d.	The card cannot use the specified interrupt. Choose a different one.

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

.An -nosplit The sr device driver was written by
.An John Hay Aq jhay@FreeBSD.org .

Netgraph support was added by
.An Julian Elischer Aq julian@FreeBSD.org .

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.

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