281 lines
7.8 KiB
Groff
281 lines
7.8 KiB
Groff
.\"
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.\" $FreeBSD$
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.\"
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.Dd December 12, 1994
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.Dt CX 4 i386
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.Os FreeBSD
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.Sh NAME
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.Nm cx
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.Nd asynchronous/synchronous Cronyx-Sigma adapter driver
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.Sh SYNOPSIS
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.Cd "device cx0 at isa? port 0x240 irq 15 drq 7"
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.Cd "device cx1 at isa? port 0x260 irq 12 drq 6"
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.Cd pseudo-device sppp
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.Pp
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The base i/o port address should be set by jumpers on the board.
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The DMA i/o channel and interrupt request numbers are configured
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by software at adapter initialization. Legal values are:
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.Pp
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.Bl -tag -compact -width Port
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.It Port
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0x240, 0x260, 0x280, 0x300, 0x320, 0x380
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.It IRQ
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3, 5, 7, 10, 11, 12, 15
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.It DMA
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5, 6, 7
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.El
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.Sh DESCRIPTION
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The Cronyx-Sigma driver supports the adapters of models 100,
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400, 500, 401, 404, 410, 440, 703, 801, 810, 840. Different models have
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different set of channels:
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.Pp
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.Bl -tag -compact -width Cronyx-Sigma-999
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.It Model
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Channels
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.It Cronyx-Sigma-100
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0
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.It Cronyx-Sigma-400
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4, 5, 6, 7
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.It Cronyx-Sigma-500
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0, 4, 5, 6, 7
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.It Cronyx-Sigma-401
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0, 1, 2, 3
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.It Cronyx-Sigma-404
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0, 1, 2, 3
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.It Cronyx-Sigma-410
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0, 1, 2, 3
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.It Cronyx-Sigma-440
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0, 1, 2, 3
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.It Cronyx-Sigma-703
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0, 1, 2, 4, 5, 6, 7
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.It Cronyx-Sigma-801
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0, 1, 2, 3, 4, 5, 6, 7
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.It Cronyx-Sigma-810
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0, 1, 2, 3, 4, 5, 6, 7
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.It Cronyx-Sigma-840
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0, 1, 2, 3, 4, 5, 6, 7
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.El
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.Pp
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A pair of two adapters can be united together by the special
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short inter-board cable. Two united adapters use the same
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IRQ and DMA channels and from the point of driver works
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as the single 16-channel multiplexer. One of the united
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boards is ``master'' and the other is ``slave''.
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.Pp
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The channels of the slave united board are numbered by the driver
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beginning with 8, for example, the united adapter of the model 100/500
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has channels 0, 8, 12, 13, 14, 15.
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.Pp
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The channels which have the RS-232 interface can be used
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both in synchronous and asynchronous modes (software selectable
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by cxconfig utility) and hence are called ``universal'' channels.
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.Pp
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The special device files,
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.Pa /dev/* ,
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for the adapter Cronyx-Sigma
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are created by th
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.Xr MAKEDEV 8
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An example:
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.Bd -literal
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cd /dev
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sh MAKEDEV cronyx ttyx0 ttyx1 ttyy0
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.Ed
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.Sh "Asynchronous driver"
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The asynchronous channel device files have the names:
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.Pa /dev/ttyx#
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- for adapter cx0,
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.Pa /dev/ttyy#
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- for adapter cx1,
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.Pa /dev/ttyz#
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- for cx2.
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Here # is the channel number in hexadecimal form, 0-9-a-f.
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.Pp
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The driver fulfills the following standard ioctl requests (see
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.Xr ioctl 2 ) :
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.Pp
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.Bl -tag -width TIOCXXXXX -compact
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.It Dv TIOCSBRK
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Start sending BREAK.
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.It Dv TIOCCBRK
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Stop sending BREAK.
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.It Dv TIOCSDTR
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Set DTR signal (DTR := 1). The DTR signal is always set
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on the first
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.Xr open 2
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and could be changed by
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.Dv TIOCCDTR ,
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.Dv TIOCSDTR ,
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.Dv TIOCMSET ,
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.Dv TIOCMBIS ,
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.Dv TIOCMBIC
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ioctl calls.
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.It TIOCCDTR
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Clear DTR signal (DTR := 0).
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.It TIOCMSET
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Set the given values of DTR and RTS signals (<DTR:RTS> := data).
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The signals DTR and RTS are controlled by
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.Dv TIOCM_DTR
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and
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.Dv TIOCM_RTS
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bits of the data argument of the ioctl system call.
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.It TIOCMBIS
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Set DTR and RTS signals (<DTR:RTS> |= data).
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The signals DTR and RTS are controlled by
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.Dv TIOCM_DTR
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and
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.Dv TIOCM_RTS
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bits of the data argument of the ioctl system call.
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.It TIOCMBIC
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Clear DTR and RTS signals (<DTR:RTS> &= ~data).
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The signals DTR and RTS are controlled by
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.Dv TIOCM_DTR
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and
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.Dv TIOCM_RTS
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bits of the data argument of the ioctl system call.
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.It TIOCMGET
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Determine the state of the modem signals of the line.
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After the call the data argument contains the following bits:
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.Pp
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.Bl -tag -width TIOCM_XXX -compact
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.It TIOCM_LE
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always set (Line Enabled)
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.It TIOCM_DSR
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Data Set Ready signal received
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.It TIOCM_CTS
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Clear To Send signal received
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.It TIOCM_CD
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Data Carrier Detect signal received
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.It TIOCM_DTR
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Data Terminal Ready signal transmitted
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.It TIOCM_RTS
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Request To Send signal transmitted
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.El
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.El
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.Sh "Synchronous driver"
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The synchronous channels and universal channels, turned to the synchronous
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mode by the
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.Xr cxconfig 8
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utility, are accessible as network
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interfaces named ``cx#'' where # is the channel number, 0..47.
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All standard network interface parameters could be set by
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.Xr ifconfig 8
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utility.
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The
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.Xr cxconfig 8
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command is used to change some extended channel
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options, and also for setting the high-level software protocol
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(e.g. PpP or Cisco HDLC).
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.Pp
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The universal channels could be used both in asynchronous and synchronous modes.
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By default the asynchronous mode is set.
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The mode could be changed by
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.Xr cxconfig 8
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utility.
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The mode is blocked while the channel is busy (an asynchronous channel
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in open state or the network interface is up).
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.Sh "Synchronous Point-to-Point protocol"
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The Cronyx-Sigma driver uses the built-in implementation of the synchronous
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Point-to-Point protocol (sppp). It includes the support for such
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protocols as PpP/HDLC and Cisco/HDLC, and also the automatic
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connection loss test (via keepalive packets).
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The sppp protocol set is implemented as an independent module
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and could be used by other drivers of synchronous serial channels.
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The version of the driver for BSD/386 (BSDI) operating system
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also supports the usage of the general set of synchronous
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protocols, implemented inside the OS.
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The external protocol set could be selected by ``cxconfig ext'' command
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(see
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.Xr cxconfig 8 ) .
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.Sh "Channel Options Management"
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The
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.Xr cxconfig 8
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utility is used for setting the channels options.
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The channel options are generally set at the start of the operating
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system (for example, from the file
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.Pa /etc/rc ) .
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Note, that not all options have a sense for every particular
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case, and an attempt to set some of them can hang up the channel or
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the whole adapter.
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.Pp
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The actual channel options control functions are implemented via
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the ioctl-s on the special device file /dev/cronyx.
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There are the following ioctl-s available:
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.Pp
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.Bl -tag -width CXIOCXXXXXXX -compact
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.It CXIOCGETMODE
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Get the channel option values.
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.It CXIOCSETMODE
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Set the channel option values.
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.El
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.Pp
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The data argument of the ioctl call has an address of the options structure:
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.Bd -literal
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typedef struct {
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unsigned char board; /* adapter number, 0..2 */
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unsigned char channel; /* channel number, 0..15 */
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unsigned char type; /* channel type (read only) */
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unsigned char iftype; /* chan0 interface */
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unsigned long rxbaud; /* receiver speed */
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unsigned long txbaud; /* transmitter speed */
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cx_chan_mode_t mode; /* channel mode */
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cx_chan_opt_t opt; /* common channel options */
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cx_opt_async_t aopt; /* async mode options */
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cx_opt_hdlc_t hopt; /* hdlc mode options */
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cx_opt_bisync_t bopt; /* bisync mode options */
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cx_opt_x21_t xopt; /* x.21 mode options */
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cx_soft_opt_t sopt; /* software options and state flags */
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} cx_options_t; /* user settable options */
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.Ed
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.Pp
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.Bl -tag -width rxbaudxxx
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.It Fa board
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The adapter number, 0..2.
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.It Fa channel
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The channel number, 0..15.
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.It Fa type
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The type of the channel (read-only argument).
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.It Fa iftype
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The interface type of the zero (and also the eight) channel: 0 - RS-232,
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1 - RS-449/V.35.
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.It Fa rxbaud
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The receiver data baud rate.
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.It Fa txbaud
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The transmitter data baud rate.
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.It Fa mode
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The channel mode: asynchronous/HDLC/Bisync/X.21.
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.It Fa opt
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The general channel options.
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.It Fa aopt
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The asynchronous mode options.
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.It Fa hopt
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The HDLC mode options.
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.It Fa bopt
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The Bisync mode options.
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.It Fa xopt
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The X.21 mode options.
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.It Fa sopt
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The software protocol options.
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.El
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.Sh FILES
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.Bl -tag -width /dev/cxXXXX -compact
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.It Pa /dev/cx??
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Asynchronous channels.
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.It Pa /dev/cronyx
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The special device file for the channel options management.
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.El
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.Pp
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The sources for the driver reside in:
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.Pp
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.Bl -tag -width /dev/cxXXXX -compact
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.It Pa /sys/i386/isa/cronyx.c
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.It Pa /sys/i386/isa/cx.c
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.It Pa /sys/i386/isa/if_cx.c
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.It Pa /sys/i386/isa/cronyx.h
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.It Pa /sys/i386/isa/cxreg.h
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.It Pa /sys/net/if_spppsubr.c
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.It Pa /sys/net/if_sppp.h
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.El
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.Sh SEE ALSO
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.Xr cxconfig 8 ,
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.Xr ifconfig 8
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