165 lines
5.3 KiB
Groff
165 lines
5.3 KiB
Groff
.\" Copyright (c) 1983, 1991 Regents of the University of California.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)dr.4 6.3 (Berkeley) 3/27/91
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.\" $Id: dr.4,v 1.2 1993/08/01 07:36:52 mycroft Exp $
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.\"
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.Dd March 27, 1991
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.Dt DR 4 tahoe
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.Os BSD 4.2
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.Sh NAME
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.Nm dr
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.Nd Ikon
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.Tn DR-11W
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interface
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.Sh SYNOPSIS
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.Cd "device dr0 at vba? csr 0xffff8000 vector drintr"
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.Sh DESCRIPTION
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The
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.Nm dr
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driver provides access
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to an Ikon
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.Tn DR-11W
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.Tn DMA
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controller.
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Each minor device is a different controller.
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.Pp
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In addition to reading and writing, the following
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.Xr ioctl 2
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requests are available:
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.Bl -tag -width DRSETNORSTALL
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.It Dv DRWAIT
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Wait for an attention interrupt from the associated device.
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.It Dv DRPIOW
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Write to the programmed
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.Tn I/O
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register.
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.It Dv DRPACL
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Write to the pulse register.
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.It Dv DRDACL
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Set the ``ac-low'' bit in the next command sent to the
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.Tn DR-11W .
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.It Dv DRPCYL
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Set the ``cycle'' bit in the next command sent to the
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.Tn DR-11W .
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.It Dv DRDFCN
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Hold the function bits until the next command is issused.
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.It Dv DRRATN
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Reset the attention flag.
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.It Dv DRRDMA
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Reset the
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.Tn DMA
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complete flag.
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.It Dv DRSFCN
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Set the function bits in the control status register and,
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as a side effect, clear the interrupt enable flag.
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.It Dv DRRPER
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Reset the parity error flag.
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.It Dv DRSETRSTALL
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Set ``no stall'' mode for all subsequent reads.
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In no stall mode the driver will abort
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read requests that fail to complete before a user
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specified timeout expires.
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.It Dv DRSETNORSTALL
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Disable no stall mode for reads.
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.It Dv DRGETRSTALL
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Return true if in no stall mode for reads.
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.It Dv DRSETRTIMEOUT
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Set the value of the timeout used in no stall mode for
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reads. The time is specified in tenths of seconds.
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.It Dv DRGETRTIMEOUT
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Return the time until (in tenths of seconds) before a read
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is timed out when in no stall mode.
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.It Dv DRSETWSTALL
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Set ``no stall'' mode for all subsequent writes.
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In no stall mode the driver will abort
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write requests that fail to complete before a user
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specified timeout expires.
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.It Dv DRSETNOWSTALL
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Disable no stall mode for writes.
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.It Dv DRGETWSTALL
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Return true if in no stall mode for writes.
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.It Dv DRSETWTIMEOUT
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Set the value of the timeout used in no stall mode for
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writes. The time is specified in tenths of seconds.
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.It Dv DRGETRTIMEOUT
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Return the time until (in tenths of seconds) before a write
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is timed out when in no stall mode.
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.It Dv DRWRITEREADY
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Return 1 if the device can accept data, 0 otherwise
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(this is really the
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.Tn DR-11W A
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status bit).
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.It Dv DRREADREADY
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Return 1 if the device has data for the host to read,
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0 otherwise (this is really the
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.Tn DR-11W B
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status bit).
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.It Dv DRBUSY
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Return 1 if the device is busy, 0 otherwise.
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.It Dv DRRESET
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Reset the DR-11W.
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.It Dv DR11STAT
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Return the driver status and the contents of the
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.Tn DR-11W
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.Tn I/O registers. The
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eight words returned are, in order, the driver
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status flags, the contents of the control status
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register, the contents of the status register
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at the time of the last interrupt from the device,
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the contents of the programmed
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.Tn I/O data register,
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a combination of the address modifier used by the
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device in performing
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.Tn VERSAbus
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transfers and the
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interrupt vector used by the device, the contents
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of the range register, the contents of the rahi
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register, and the contents of the ralo register.
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.It Dv DR11LOOP
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Perform loopback testing (the loopback cable must
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be in place for this to work).
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.El
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.Sh FILES
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.Bl -tag -width /dev/dr[0-7]xx -compact
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.It Pa /dev/dr[0-7]
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standard devices
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.El
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.Sh DIAGNOSTICS
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Lots of them, none of them meaningful.
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.Sh HISTORY
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The
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.Nm
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driver appeared in
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.Bx 4.3 tahoe .
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.Sh BUGS
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This driver needs to be rewritten.
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