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1 .\"
2 .\" Copyright (c) 1994 Christian E. Hopps
3 .\" All rights reserved.
4 .\"
5 .\" Redistribution and use in source and binary forms, with or without
6 .\" modification, are permitted provided that the following conditions
7 .\" are met:
8 .\" 1. Redistributions of source code must retain the above copyright
9 .\" notice, this list of conditions and the following disclaimer.
10 .\" 2. Redistributions in binary form must reproduce the above copyright
11 .\" notice, this list of conditions and the following disclaimer in the
12 .\" documentation and/or other materials provided with the distribution.
13 .\" 3. All advertising materials mentioning features or use of this software
14 .\" must display the following acknowledgement:
15 .\" This product includes software developed by Christian E. Hopps.
16 .\" 4. The name of the author may not be used to endorse or promote products
17 .\" derived from this software without specific prior written permission
18 .\"
19 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 .\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 .\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 .\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 .\"
30 .\" $NetBSD: atzsc.4,v 1.9 2001/06/13 23:38:30 wiz Exp $
31 .\"
32 .Dd August 31, 1994
33 .Dt ATZSC 4 amiga
34 .Os
35 .Sh NAME
36 .Nm atzsc
37 .Nd A2091 low level SCSI interface
38 .Sh SYNOPSIS
39 .Cd "atzsc0 at zbus0"
40 .Sh DESCRIPTION
41 The
42 .Tn Amiga
43 architecture uses a common machine independent scsi sub-system
44 provided in the kernel source. The machine independent
45 drivers that use this code access the hardware through a
46 common interface. (see
47 .Xr scsibus 4 )
48 This common interface interacts with a machine dependent interface,
49 such as
50 .Nm atzsc ,
51 which then handles the hardware specific issues.
52 .Pp
53 The
54 .Nm
55 interface handles things such as DMA and interrupts as well as
56 actually sending commands, negotiating synchronous or asynchronous
57 transfers and handling disconnect/reconnect of SCSI targets.
58 The hardware that
59 .Nm
60 uses is based on the WD33c93 SCSI chip.
61 .Sh HARDWARE
62 The
63 .Nm
64 interface supports the following Zorro II expansion cards:
65 .Bl -tag -width "A2091" -offset indent
66 .It Em A2091
67 Commodore SCSI adapter, manufacturer\ 514, product\ 2 or product\ 3
68 .El
69 .Sh DIAGNOSTICS
70 .Bl -diag
71 .It sbicwait TIMEO @%d with asr=x%x csr=x%x
72 The 33c93 code (sbic) has been waiting too long for a SCSI chip
73 operation to complete. %d is the line in the source file
74 .Pa amiga/dev/sbic.c
75 at which the SCSI chip timed-out. Asr and csr are status registers
76 within the SCSI chip.
77 .It atzsc%d: abort %s: csr = 0x%02x, asr = 0x%02x
78 A SCSI operation %s was aborted due to an error.
79 .It atzsc%d: csr == 0x%02i
80 A error has occurred within the SCSI chip code.
81 .It atzsc%d: unexpected phase %d in icmd from %d
82 The target described by
83 .Sq from %d
84 has taken the SCSI bus into a phase which is not
85 expected during polled IO.
86 .It atzsc%d: unexpected phase %d in icmd from %d
87 The target described by
88 .Sq from %d
89 has taken the SCSI bus into a phase which is not
90 expected during DMA IO setup.
91 .El
92 .Sh SEE ALSO
93 .Xr scsibus 4
94 .Sh HISTORY
95 The
96 .Nm
97 interface first appeared in
98 .Nx 1.0