BSD 4_4 development

[unix-history] / usr / share / man / cat4 / tahoe / dr.0

DR(4)            BSD Programmer's Manual (Tahoe Architecture)            DR(4)

N\bNA\bAM\bME\bE
    d\bdr\br - Ikon DR-11W interface

S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS
    d\bde\bev\bvi\bic\bce\be d\bdr\br0\b0 a\bat\bt v\bvb\bba\ba?\b? c\bcs\bsr\br 0\b0x\bxf\bff\bff\bff\bf8\b80\b00\b00\b0 v\bve\bec\bct\bto\bor\br d\bdr\bri\bin\bnt\btr\br

D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
    The d\bdr\br driver provides access to an Ikon DR-11W DMA controller.  Each mi-
    nor 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 de-
                   vice.

    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 trans-
                   fers and the interrupt vector used by the device, the con-
                   tents of the range register, the contents of the rahi reg-
                   ister, and the contents of the ralo register.

    DR11LOOP       Perform loopback testing (the loopback cable must be in
                   place for this to work).

F\bFI\bIL\bLE\bES\bS
    /dev/dr[0-7]    standard devices

D\bDI\bIA\bAG\bGN\bNO\bOS\bST\bTI\bIC\bCS\bS
    Lots of them, none of them meaningful.

H\bHI\bIS\bST\bTO\bOR\bRY\bY
    The d\bdr\br driver appeared in 4.3BSD-Tahoe.

B\bBU\bUG\bGS\bS
    This driver needs to be rewritten.

4.2 Berkeley Distribution        June 5, 1993                                2