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/* $NetBSD: fdreg.h,v 1.4 1995/06/28 04:31:19 cgd 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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
*/
/*
* AT floppy controller registers and bitfields
*/
/* uses NEC765 controller */
#include <dev/ic/nec765reg.h>
#ifndef LOCORE
struct fdreg_77 {
u_int8_t fd_statusA;
u_int8_t fd_statusB;
u_int8_t fd_dor; /* Digital Output Register (R/W) */
u_int8_t fd_tdr; /* Tape Control Register (R/W) */
u_int8_t fd_msr; /* Main Status Register (R) */
#define fd_drs fd_msr /* Data Rate Select Register (W) */
u_int8_t fd_fifo; /* Data (FIFO) register (R/W) */
u_int8_t fd_reserved;
u_int8_t fd_dir; /* Digital Input Register (R) */
#define fd_ccr fd_dir /* Configuration Control (W) */
};
struct fdreg_72 {
u_int8_t fd_msr; /* Main Status Register (R) */
#if already_a_define
#define fd_drs fd_msr /* Data Rate Select Register (W) */
#endif
u_int8_t fd_fifo; /* Data (FIFO) register (R/W) */
};
union fdreg {
struct fdreg_72 fun72;
struct fdreg_77 fun77;
};
#endif
/* Data Select Register bits */
#define DRS_RESET 0x80
#define DRS_POWER 0x40
#define DRS_PLL 0x20
#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 */
/* Digital Output Register bits */
#define FDO_FDSEL 0x03 /* floppy device select */
#define FDO_FRST 0x04 /* floppy controller reset */
#define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */
#define FDO_MOEN(n) ((1 << n) * 0x10) /* motor enable */
#define FDI_DCHG 0x80 /* diskette has been changed */
/* XXX - find a place for these... */
#define NE7CMD_CFG 0x13
#define CFG_EIS 0x40
#define CFG_EFIFO 0x20
#define CFG_POLL 0x10
#define CFG_THRHLD_MASK 0x0f
#define NE7CMD_LOCK 0x14
#define CFG_LOCK 0x80
#define NE7CMD_MOTOR 0x0b
#define MOTOR_ON 0x80
#define NE7CMD_DUMPREG 0x0e
#define NE7CMD_VERSION 0x10
#define ST1_OVERRUN 0x10
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