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1.1 root 1: .\" Copyright (c) 1983 Regents of the University of California.
2: .\" All rights reserved. The Berkeley software License Agreement
3: .\" specifies the terms and conditions for redistribution.
4: .\"
5: .\" @(#)dr.4 6.2 (Berkeley) 6/30/87
6: .\"
7: .TH DR 4 "November 21, 1986"
8: .UC 5
9: .SH NAME
10: dr \- Ikon DR-11W interface
11: .SH SYNOPSIS
12: .B "device dr0 at vba? csr 0xffff8000 vector drintr"
13: .SH DESCRIPTION
14: The
15: .I dr
16: driver provides access
17: to an Ikon DR-11W DMA controller.
18: Each minor device is a different controller.
19: .PP
20: In addition to reading and writing, the following
21: .I ioctl
22: requests are available:
23: .TP 10
24: DRWAIT
25: Wait for an attention interrupt from the associated device.
26: .TP
27: DRPIOW
28: Write to the programmed i/o register.
29: .TP
30: DRPACL
31: Write to the pulse register.
32: .TP
33: DRDACL
34: Set the ``ac-low'' bit in the next command sent to the DR-11W.
35: .TP
36: DRPCYL
37: Set the ``cycle'' bit in the next command sent to the DR-11W.
38: .TP
39: DRDFCN
40: Hold the function bits until the next command is issused.
41: .TP
42: DRRATN
43: Reset the attention flag.
44: .TP
45: DRRDMA
46: Reset the DMA complete flag.
47: .TP
48: DRSFCN
49: Set the function bits in the control status register and,
50: as a side effect, clear the interrupt enable flag.
51: .TP
52: DRRPER
53: Reset the parity error flag.
54: .TP
55: DRSETRSTALL
56: Set ``no stall'' mode for all subsequent reads.
57: In no stall mode the driver will abort
58: read requests that fail to complete before a user
59: specified timeout expires.
60: .TP
61: DRSETNORSTALL
62: Disable no stall mode for reads.
63: .TP
64: DRGETRSTALL
65: Return true if in no stall mode for reads.
66: .TP
67: DRSETRTIMEOUT
68: Set the value of the timeout used in no stall mode for
69: reads. The time is specified in tenths of seconds.
70: .TP
71: DRGETRTIMEOUT
72: Return the time until (in tenths of seconds) before a read
73: is timed out when in no stall mode.
74: .TP
75: DRSETWSTALL
76: Set ``no stall'' mode for all subsequent writes.
77: In no stall mode the driver will abort
78: write requests that fail to complete before a user
79: specified timeout expires.
80: .TP
81: DRSETNOWSTALL
82: Disable no stall mode for writes.
83: .TP
84: DRGETWSTALL
85: Return true if in no stall mode for writes.
86: .TP
87: DRSETWTIMEOUT
88: Set the value of the timeout used in no stall mode for
89: writes. The time is specified in tenths of seconds.
90: .TP
91: DRGETRTIMEOUT
92: Return the time until (in tenths of seconds) before a write
93: is timed out when in no stall mode.
94: .TP
95: DRWRITEREADY
96: Return 1 if the device can accept data, 0 otherwise
97: (this is areally the DR-11W A status bit).
98: .TP
99: DRREADREADY
100: Return 1 if the device has data for the host to read,
101: 0 otherwise (this is really the DR-11W B status bit).
102: .TP
103: DRBUSY
104: Return 1 if the device is busy, 0 otherwise.
105: .TP
106: DRRESET
107: Reset the DR-11W.
108: .TP
109: DR11STAT
110: Return the driver status and the contents of the
111: DR-11W i/o registers. The
112: eight words returned are, in order, the driver
113: status flags, the contents of the control status
114: register, the contents of the status register
115: at the time of the last interrupt from the device,
116: the contents of the programmed i/o data register,
117: a combination of the address modifier used by the
118: device in performing VERSAbus transfers and the
119: interrupt vector used by the device, the contents
120: of the range register, the contents of the rahi
121: register, and the contents of the ralo register.
122: .TP
123: DR11LOOP
124: Perform loopback testing (the loopback cable must
125: be in place for this to work).
126: .SH FILES
127: /dev/dr[0-7] standard devices
128: .SH DIAGNOSTICS
129: Lots of them, none of them meaningful.
130: .SH BUGS
131: This driver needs to be rewritten.
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