2 .\" Copyright (c) 1996 John Hay. All rights reserved.
4 .\" Redistribution and use in source and binary forms, with or without
5 .\" modification, are permitted provided that the following conditions
7 .\" 1. Redistributions of source code must retain the above copyright
8 .\" notice, this list of conditions and the following disclaimer.
9 .\" 2. Redistributions in binary form must reproduce the above copyright
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11 .\" documentation and/or other materials provided with the distribution.
12 .\" 3. All advertising materials mentioning features or use of this software
13 .\" must display the following acknowledgement:
14 .\" This product includes software developed by John Hay.
15 .\" 4. Neither the name of the author nor the names of any co-contributors
16 .\" may be used to endorse or promote products derived from this software
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31 .\" $FreeBSD: src/share/man/man4/man4.i386/sr.4,v 1.15.2.4 2001/08/17 13:08:46 ru Exp $
38 .Nd synchronous RISCom/N2 / WANic 400/405 device driver
42 .Cd "pseudo-device sppp"
46 driver supports the WANic 400/405 PCI cards
47 that are based on the HD64570 chip.
51 sppp code is used for the link level layer.
53 default protocol used is PPP.
54 The Cisco HDLC protocol can be used by
60 Alternately, the driver can be compiled to support
67 If it isn't specified, the driver will
69 .Bl -hang -offset indent
70 .It "The card has 2 ports."
71 .It "The clock for the serial ports is external and the transmitter uses"
72 the same clock as the receiver.
77 are a bit field and can be used to force a different
78 behaviour than the default.
79 .Bl -hang -offset indent
81 The card has only one port.
83 Use separate external clocks for transmit and receive on port 0.
85 Use separate external clocks for transmit and receive on port 1.
88 Only one line for each card is needed in the kernel configuration file.
89 The first card's ports will be installed from sr0. The numbering of the
90 next card will continue where the first stopped, eg. if the first card
91 is a two port card it will use sr0 and sr1. The next card will then
94 The card only supports IRQ 3, 4, 5, 7, 10, 11, 12 and 15.
96 The iomem area is a 16Kb block and must start at a 16Kb boundary.
98 If the kernel is compiled with
99 .Cd "options NETGRAPH"
100 then the sppp and Cisco HDLC modes are disabled (and the sppp driver
101 is unneeded), and this driver functions as a
103 node with a single hook named
105 Connecting to this hook enables the transmission of raw HDLC frames.
106 The node will have the same name as the device with ``sync_''
110 .Bl -tag -width ".Pa /sys/dev/netif/sr/if_sr_pci.c" -compact
111 .It Pa /sys/dev/netif/sr/if_sr.c
112 .It Pa /sys/dev/netif/sr/if_sr.h
113 .It Pa /sys/dev/netif/sr/if_sr_pci.c
114 .It Pa /sys/dev/netif/sr/if_srregs.h
118 .It "sr%d: Warning illegal interrupt %d."
119 The card cannot use the specified interrupt.
120 Choose a different one.
131 device driver was written by
132 .An John Hay Aq Mt jhay@FreeBSD.org .
134 Netgraph support was added by
135 .An Julian Elischer Aq Mt julian@FreeBSD.org .
137 At the moment only the X.21 interface is tested.
139 may need tweaks to the clock selection code.
141 The code can probably stand some optimizing.