/* $NetBSD: fdreg.h,v 1.6 2012/10/14 18:38:32 tsutsui Exp $ */
/*-
* Copyright (c) 1991 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)fdreg.h 7.1 (Berkeley) 5/9/91
*/
/*
* x680x0 floppy controller registers and bitfields
*/
/* uses NEC72065 controller */
#include <dev/ic/nec765reg.h>
/* registers */
#define fdsts 0 /* NEC 765 Main Status Register (R) */
#define fddata 1 /* NEC 765 Data Register (R/W) */
#define fdout 2 /* Digital Output Register (W) */
#define fdctl 3 /* Control Register (W) */
#define FDC_500KBPS 0x00 /* 500KBPS MFM drive transfer rate */
#define FDC_300KBPS 0x01 /* 300KBPS MFM drive transfer rate */
#define FDC_250KBPS 0x02 /* 250KBPS MFM drive transfer rate */
#define FDC_125KBPS 0x03 /* 125KBPS FM drive transfer rate */
#define FDC_BSIZE 512
#define FDC_MAXIOSIZE MAXBSIZE
/* Floppy disk controller command bytes. */
#define NE7CMD_RESET 0x36 /* reset command for fdc */
/* default attach args */
#define FDC_ADDR 0xe94000 /* builtin fdc is here */
#define FDC_MAPSIZE 0x2000 /* builtin fdc I/O range */
#define FDC_INTR 96 /* interrupt vector */
#define FDC_DMA 0 /* DMA ch# */
#define FDC_DMAINTR 100 /* DMA interrupt vector */
/*
* fdformat parameters
*/
#define FD_MAX_NSEC 18 /* highest known number of spt */
struct ne7_fd_formb {
int cyl, head;
int transfer_rate; /* fdreg.h: FDC_???KBPS */
union {
struct fd_form_data {
/*
* DO NOT CHANGE THE LAYOUT OF THIS STRUCTS
* it is hardware-dependent since it exactly
* matches the byte sequence to write to FDC
* during its `format track' operation
*/
uint8_t secshift; /* 0 -> 128, ...; usually 2 -> 512 */
uint8_t nsecs; /* must be <= FD_MAX_NSEC */
uint8_t gaplen; /* GAP 3 length; usually 84 */
uint8_t fillbyte; /* usually 0xf6 */
struct fd_idfield_data {
/*
* data to write into id fields;
* for obscure formats, they mustn't match
* the real values (but mostly do)
*/
uint8_t cylno; /* 0 thru 79 (or 39) */
uint8_t headno; /* 0, or 1 */
uint8_t secno; /* starting at 1! */
uint8_t secsize; /* usually 2 */
} idfields[FD_MAX_NSEC]; /* 0 <= idx < nsecs used */
} structured;
uint8_t raw[1]; /* to have continuous indexed access */
} format_info;
};
/* make life easier */
# define fd_formb_secshift format_info.structured.secshift
# define fd_formb_nsecs format_info.structured.nsecs
# define fd_formb_gaplen format_info.structured.gaplen
# define fd_formb_fillbyte format_info.structured.fillbyte
/* these data must be filled in for(i = 0; i < fd_formb_nsecs; i++) */
# define fd_formb_cylno(i) format_info.structured.idfields[i].cylno
# define fd_formb_headno(i) format_info.structured.idfields[i].headno
# define fd_formb_secno(i) format_info.structured.idfields[i].secno
# define fd_formb_secsize(i) format_info.structured.idfields[i].secsize