fdvar.h revision 1.5 1 /*
2 * $NetBSD: fdvar.h,v 1.5 1996/12/08 23:40:34 pk Exp $
3 *
4 * Copyright (c) 1995 Paul Kranenburg
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Paul Kranenburg.
18 * 4. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 */
33
34 #define FDC_BSIZE 512
35 #define FDC_MAXIOSIZE NBPG /* XXX should be MAXBSIZE */
36
37 #define FDC_NSTATUS 10
38
39 #ifndef _LOCORE
40 struct fdcio {
41 /*
42 * 82072 (sun4c) and 82077 (sun4m) controllers have different
43 * register layout; so we cache some here.
44 */
45 volatile u_int8_t *fdcio_reg_msr;
46 volatile u_int8_t *fdcio_reg_fifo;
47 volatile u_int8_t *fdcio_reg_dor; /* 82077 only */
48
49 /*
50 * Interrupt state.
51 */
52 int fdcio_istate;
53
54 /*
55 * IO state.
56 */
57 char *fdcio_data; /* pseudo-dma data */
58 int fdcio_tc; /* pseudo-dma Terminal Count */
59 u_char fdcio_status[FDC_NSTATUS]; /* copy of registers */
60 int fdcio_nstat; /* # of valid status bytes */
61
62 /*
63 * Statictics.
64 */
65 struct evcnt fdcio_intrcnt;
66 };
67 #endif /* _LOCORE */
68
69 /* istate values */
70 #define ISTATE_IDLE 0 /* No HW interrupt expected */
71 #define ISTATE_SPURIOUS 1 /* Spurious HW interrupt detected */
72 #define ISTATE_SENSEI 2 /* Do SENSEI on next HW interrupt */
73 #define ISTATE_DMA 3 /* Pseudo-DMA in progress */
74 #define ISTATE_DONE 4 /* Interrupt processing complete */
75
76
77 #define FD_MAX_NSEC 36 /* highest known number of spt - allow for */
78 /* 2.88 MB drives */
79
80 #ifndef _LOCORE
81 struct ne7_fd_formb {
82 int cyl, head;
83 int transfer_rate; /* fdreg.h: FDC_???KBPS */
84
85 union {
86 struct fd_form_data {
87 /*
88 * DO NOT CHANGE THE LAYOUT OF THIS STRUCTS
89 * it is hardware-dependant since it exactly
90 * matches the byte sequence to write to FDC
91 * during its `format track' operation
92 */
93 u_char secshift; /* 0 -> 128, ...; usually 2 -> 512 */
94 u_char nsecs; /* must be <= FD_MAX_NSEC */
95 u_char gaplen; /* GAP 3 length; usually 84 */
96 u_char fillbyte; /* usually 0xf6 */
97 struct fd_idfield_data {
98 /*
99 * data to write into id fields;
100 * for obscure formats, they mustn't match
101 * the real values (but mostly do)
102 */
103 u_char cylno; /* 0 thru 79 (or 39) */
104 u_char headno; /* 0, or 1 */
105 u_char secno; /* starting at 1! */
106 u_char secsize; /* usually 2 */
107 } idfields[FD_MAX_NSEC]; /* 0 <= idx < nsecs used */
108 } structured;
109 u_char raw[1]; /* to have continuous indexed access */
110 } format_info;
111 };
112
113 /* make life easier */
114 #define fd_formb_secshift format_info.structured.secshift
115 #define fd_formb_nsecs format_info.structured.nsecs
116 #define fd_formb_gaplen format_info.structured.gaplen
117 #define fd_formb_fillbyte format_info.structured.fillbyte
118 /* these data must be filled in for(i = 0; i < fd_formb_nsecs; i++) */
119 #define fd_formb_cylno(i) format_info.structured.idfields[i].cylno
120 #define fd_formb_headno(i) format_info.structured.idfields[i].headno
121 #define fd_formb_secno(i) format_info.structured.idfields[i].secno
122 #define fd_formb_secsize(i) format_info.structured.idfields[i].secsize
123 #endif /* _LOCORE */
124