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AR(4) FreeBSD/i386 Kernel Interfaces Manual AR(4) NAME ar -- synchronous Digi/Arnet device driver SYNOPSIS device ar0 at isa? port 0x300 irq 10 iomem 0xd0000 device ar1 at isa? port 0x310 irq 11 iomem 0xd0000 pseudo-device sppp DESCRIPTION The ar driver supports the Digi/Arnet SYNC/570i ISA and PCI cards that is based on the HD64570 chip. Both the 2 and 4 port cards are supported and auto detected. 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 netgraph(4) (see below). NUMBERING Only one line for each card is needed in the kernel configuration file. The first card's ports will be installed from ar0. The numbering of the next card will continue where the first stopped, eg. if the first card is a two port card it will use ar0 and ar1. The next card will then start at ar2. The card only supports IRQ 3, 5, 7, 10, 11, 12 and 15. The iomem area is a 16Kb block and must start at a 16Kb boundary. 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_ar0. DIAGNOSTICS ar%d: Warning illegal interrupt %d. The card cannot use the specified interrupt. Choose a different one. FILES /sys/i386/isa/ic/hd64570.h /sys/i386/isa/if_arregs.h /sys/i386/isa/if_ar.c /sys/i386/isa/if_ar.h /sys/pci/if_ar_p.c BUGS At the moment only the V.35 and X.21 interfaces are tested. The others may need tweaks to the clock selection code. The code can probably stand some optimizing. Please report bugs to <jhay@FreeBSD.org>. SEE ALSO cx(4), netgraph(4), netintro(4), sr(4), ifconfig(8) HISTORY The ar device driver first appeared in FreeBSD 2.2. AUTHORS The ar device driver was written by John Hay <jhay@FreeBSD.org>. Net- graph support was added by Julian Elischer <julian@FreeBSD.org>. FreeBSD 11.1 November 19, 1995 FreeBSD 11.1
NAME | SYNOPSIS | DESCRIPTION | NUMBERING | NETGRAPH SUPPORT | DIAGNOSTICS | FILES | BUGS | SEE ALSO | HISTORY | AUTHORS
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