mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-25 11:37:56 +00:00
4bd9ba3c2f
Corrected some bogus cross references to man pages that we don't/won't have and either deleted them, or found a more appropriate man page that we do have. Various other minor changes to silence manck. Manck is currently down to about 200 lines of errors, down from the 500 - 600+ when I started all this.
161 lines
6.3 KiB
Groff
161 lines
6.3 KiB
Groff
.\" $Id: si.4,v 1.3 1995/12/29 01:39:06 peter Exp $
|
|
.\" The following requests are required for all man pages.
|
|
.Dd September 16, 1995
|
|
.Os FreeBSD
|
|
.Dt SI 4
|
|
.Sh NAME
|
|
.Nm si
|
|
.Nd Driver for Specialix International SI/XIO 8-32 port intelligent serial card.
|
|
.Sh SYNOPSIS
|
|
.Nm "device si0 at isa? tty irq 12 iomem 0xd0000 vector siintr"
|
|
.Sh DESCRIPTION
|
|
The Specialix SI and XIO hardware makes up an 8 to 32 port RS-232 serial
|
|
multiplexor.
|
|
.Pp
|
|
This driver was ported and tested on an ISA bus machine, and has rudimentry
|
|
support for operation on an EISA bus system as well, but as of this time the
|
|
EISA version has not been tested by the Author - it may or may not work. It
|
|
has yet to be updated to the 'new style' eisa configuration system.
|
|
.Pp
|
|
The system uses two components.. A "Host adapter", which is plugged into
|
|
an ISA/EISA slot and provides intelligence and buffering/processing
|
|
capabilities, as well as an external bus in the form of a 50 pin cable.
|
|
.Pp
|
|
On this cable, "modules" are connected. The "SI" module comes in a 4 and 8
|
|
port version, and has simple UARTS. The "XIO" module comes only in an 8 port
|
|
version, and has two powerful RISC-like UARTS as well.
|
|
.Pp
|
|
The host adapter polls and transfers data between the modules and the main
|
|
Operating system. The Host adapter provides a 256 byte transmit and 256 byte
|
|
receive FIFO for each of the 32 ports that it can maintain.
|
|
.Pp
|
|
The XIO module panels can operate each of their 8 ports at 115,200 baud, while
|
|
the SI version can run at 57,600 baud.
|
|
.Pp
|
|
The host adapter uses a shared memory block in the traditional ISA bus
|
|
"hole" betweem 0xA0000 and 0xEFFFF. The adapter can be configured outside
|
|
range, but requires the memory range to be explicitly non-cached. The
|
|
driver does not yet support this mode of operation.
|
|
.Pp
|
|
The adapter can use Irq's 11, 12 or 15. It is rumoured that the ISA adapter
|
|
cards provide their own tri-state drivers and pullups, and may be able to
|
|
share an IRQ between all SI/XIO host cards. This has not been tested, and
|
|
the driver does not support this mode of operation. The actual IRQ used is
|
|
soft-configured onto the host card at boot time, but automatic selection
|
|
of a free IRQ is not yet implemented in the FreeBSD version.
|
|
.Pp
|
|
The si device driver may have some of it's configuration settings changed
|
|
at run-time with the
|
|
.Xr sicontrol 8
|
|
utility.
|
|
.Pp
|
|
The si device driver also responds to the
|
|
.Xr comcontrol 8
|
|
utility for configuring drain-on-close timeouts.
|
|
.Pp
|
|
An open on a /dev device node controlled by the si driver obeys the same
|
|
semantics as the
|
|
.Xr sio 4
|
|
driver. It fully supports the usual semantics of the cua ports, and the
|
|
"initial termios" and "locked termios" settings. In summary, an open on a
|
|
tty port will block until DCD is raised, unless O_NONBLOCK is specified.
|
|
CLOCAL is honored. An open on a cua port will always succeed, but DCD
|
|
transitions will be honored after DCD rises for the first time.
|
|
.Pp
|
|
Normally, up to four SI/XIO host cards may be controlled by the si driver,
|
|
but due to the lack of available interrupts that the card can be configured
|
|
to use, only three may be presently used. Polling operation is not currently
|
|
implemented, although it is a standard mode of operation for Specialix shipped
|
|
drivers. Once this is implemented, all four cards may be used.
|
|
.Pp
|
|
The lowest 5 bits of the minor device number are used to select the port
|
|
number on the mudule cluster.
|
|
si driver,
|
|
but due to the lack of available interrupts that the card can be configured
|
|
to use, only three may be presently used. Polling operation is not currently
|
|
implemented, although it is a standard mode of operation for Specialix shipped
|
|
drivers. Once this is implemented, all four cards may be used.
|
|
.Pp
|
|
The lowest 5 bits of the minor device number are used to select the port
|
|
number on the mudule cluster. The next 2 bits select which of 4 host adapter
|
|
cards. This allows a maximum of 128 ports on this driver.
|
|
.Pp
|
|
Bit 7 is used to differentiate a tty/dialin port (bit 7=0) and a
|
|
cua/callout port (bit 7=1).
|
|
.Pp
|
|
Bit 8 through 15 (on FreeBSD) are unavailable as they are a shadow of the
|
|
major device number.
|
|
.Pp
|
|
If bit 16 is a 1, the device node is referring to the "initial state" device.
|
|
This "initial state" is used to prime the
|
|
.Xr termios 4
|
|
settings of the device when it is initially opened.
|
|
If bit 17 is a 1, the device node is referring to the "locked state" device.
|
|
The "locked state" is used to prevent the
|
|
.Xr termios 4
|
|
settings from being changed.
|
|
.Pp
|
|
To manipulate the initial/locked settings, the
|
|
.Xr stty 1
|
|
command is useful. When setting the "locked" variables, enabling the mode
|
|
on the lock device will lock the termios mode, while disabling the mode will
|
|
unlock it.
|
|
.\" The following requests should be uncommented and used where appropriate.
|
|
.\" This next request is for sections 2 and 3 function return values only.
|
|
.\" .Sh RETURN VALUES
|
|
.\" This next request is for sections 1, 6, 7 & 8 only
|
|
.\" .Sh ENVIRONMENT
|
|
.Sh FILES
|
|
.Bl -tag -width /dev/si_control -compact
|
|
.It Pa /dev/si_control
|
|
global driver control file for
|
|
.Xr sicontrol 8
|
|
.It Pa /dev/ttyA*
|
|
terminal/dialin ports
|
|
.It Pa /dev/cuaA*
|
|
dialout ports
|
|
.It Pa /dev/ttyiA*
|
|
initial termios state devices
|
|
.It Pa /dev/ttylA*
|
|
locked termios state devices
|
|
.El
|
|
.\" .Sh EXAMPLES
|
|
.\" This next request is for sections 1, 6, 7 & 8 only
|
|
.\" (command return values (to shell) and fprintf/stderr type diagnostics)
|
|
.\" .Sh DIAGNOSTICS
|
|
.\" The next request is for sections 2 and 3 error and signal handling only.
|
|
.\" .Sh ERRORS
|
|
.Sh SEE ALSO
|
|
.Xr stty 1 ,
|
|
.Xr termios 4 ,
|
|
.Xr tty 4 ,
|
|
.Xr sio 4 ,
|
|
.Xr sicontrol 8 ,
|
|
.Xr comcontrol 8 .
|
|
.\" .Sh STANDARDS
|
|
.Sh HISTORY
|
|
This driver is loosely based on driver code originating at Specialix, which
|
|
was ported to run on BSDI by
|
|
.Nm Andy Rutter <andy@specialix.co.uk> .
|
|
The System V driver source is/was available by ftp from
|
|
.Nm ftp.specialix.co.uk .
|
|
.Pp
|
|
This driver is not supported by Specialix International.
|
|
.Sh AUTHORS
|
|
.Nm Peter Wemm <peter@freebsd.org>
|
|
obtained the code from Andy Rutter and ported it to FreeBSD, with a large
|
|
amount of invalueable assistance from
|
|
.Nm Bruce Evans <bde@zeta.org.au>
|
|
.Pp
|
|
Man page by Peter Wemm.
|
|
.Sh BUGS
|
|
The EISA support is untested.
|
|
.Pp
|
|
The interrupt tuning rate is not believed to be optimal at this time for
|
|
maximum efficiency.
|
|
.Pp
|
|
POLL mode is not implemented yet.
|
|
.Pp
|
|
Operation outside the traditional ISA "hole" is not yet supported, although it
|
|
should work if the test is removed from the probe routine.
|