DR

Section: Devices and Network Interfaces (4)
Updated: tahoe
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BSD mandoc
BSD 4.2  

NAME

dr - Ikon DR-11W interface  

SYNOPSIS

device dr0 at vba? csr 0xffff8000 vector drintr  

DESCRIPTION

The dr driver provides access to an Ikon DR-11W DMA controller. Each minor device is a different controller.

In addition to reading and writing, the following ioctl(2) requests are available:

DRWAIT
Wait for an attention interrupt from the associated device.
DRPIOW
Write to the programmed I/O register.
DRPACL
Write to the pulse register.
DRDACL
Set the ``ac-low'' bit in the next command sent to the DR-11W
DRPCYL
Set the ``cycle'' bit in the next command sent to the DR-11W
DRDFCN
Hold the function bits until the next command is issused.
DRRATN
Reset the attention flag.
DRRDMA
Reset the DMA complete flag.
DRSFCN
Set the function bits in the control status register and, as a side effect, clear the interrupt enable flag.
DRRPER
Reset the parity error flag.
DRSETRSTALL
Set ``no stall'' mode for all subsequent reads. In no stall mode the driver will abort read requests that fail to complete before a user specified timeout expires.
DRSETNORSTALL
Disable no stall mode for reads.
DRGETRSTALL
Return true if in no stall mode for reads.
DRSETRTIMEOUT
Set the value of the timeout used in no stall mode for reads. The time is specified in tenths of seconds.
DRGETRTIMEOUT
Return the time until (in tenths of seconds) before a read is timed out when in no stall mode.
DRSETWSTALL
Set ``no stall'' mode for all subsequent writes. In no stall mode the driver will abort write requests that fail to complete before a user specified timeout expires.
DRSETNOWSTALL
Disable no stall mode for writes.
DRGETWSTALL
Return true if in no stall mode for writes.
DRSETWTIMEOUT
Set the value of the timeout used in no stall mode for writes. The time is specified in tenths of seconds.
DRGETRTIMEOUT
Return the time until (in tenths of seconds) before a write is timed out when in no stall mode.
DRWRITEREADY
Return 1 if the device can accept data, 0 otherwise (this is really the DR-11W A status bit).
DRREADREADY
Return 1 if the device has data for the host to read, 0 otherwise (this is really the DR-11W B status bit).
DRBUSY
Return 1 if the device is busy, 0 otherwise.
DRRESET
Reset the DR-11W.
DR11STAT
Return the driver status and the contents of the DR-11W I/O registers. The eight words returned are, in order, the driver status flags, the contents of the control status register, the contents of the status register at the time of the last interrupt from the device, the contents of the programmed I/O data register, a combination of the address modifier used by the device in performing VERSAbus transfers and the interrupt vector used by the device, the contents of the range register, the contents of the rahi register, and the contents of the ralo register.
DR11LOOP
Perform loopback testing (the loopback cable must be in place for this to work).

 

FILES

/dev/dr[0-7]
standard devices

 

DIAGNOSTICS

Lots of them, none of them meaningful.  

HISTORY

The driver appeared in BSD 4.3 tahoe  

BUGS

This driver needs to be rewritten.


 

Index

NAME
SYNOPSIS
DESCRIPTION
FILES
DIAGNOSTICS
HISTORY
BUGS

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Time: 06:48:29 GMT, May 19, 2025