sys/arch/sun3/dev/fdvar.h

   1 /*      $NetBSD: fdvar.h,v 1.5 2005/12/11 12:19:20 christos Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Paul Kranenburg.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #define FDC_BSIZE       512
  33 #define FDC_MAXIOSIZE   NBPG    /* XXX should be MAXBSIZE */
  34
  35 #define FDC_NSTATUS     10
  36
  37 #ifndef _LOCORE
  38 struct fdcio {
  39         /*
  40          * 82072 (sun4c,sun3x) and 82077 (sun4m) controllers have different
  41          * register layout; so we cache some here.
  42          */
  43         volatile uint8_t        *fdcio_reg_msr;
  44         volatile uint8_t        *fdcio_reg_fifo;
  45         volatile uint8_t        *fdcio_reg_dor; /* 82077 only */
  46         volatile uint8_t        *fdcio_reg_fcr; /* sun3x floppy control reg */
  47         volatile uint8_t        *fdcio_reg_fvr; /* sun3x floppy int. vector */
  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 */