* Copyright (c) 1991 The Regents of the University of California.

/* $NetBSD: fdreg.h,v 1.4 2005/12/11 12:19:20 christos 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
*/

/*
* AT floppy controller registers and bitfields
*/

/* uses NEC765 controller */
#include <dev/ic/nec765reg.h>

#ifndef _LOCORE
struct fdreg_77 {
uint8_t fd_statusA;
uint8_t fd_statusB;
uint8_t fd_dor; /* Digital Output Register (R/W) */
uint8_t fd_tdr; /* Tape Control Register (R/W) */
uint8_t fd_msr; /* Main Status Register (R) */
#define fd_drs fd_msr /* Data Rate Select Register (W) */
uint8_t fd_fifo; /* Data (FIFO) register (R/W) */
uint8_t fd_reserved;
uint8_t fd_dir; /* Digital Input Register (R) */
#define fd_ccr fd_dir /* Configuration Control (W) */
};

struct fdreg_72 {
uint8_t fd_msr; /* Main Status Register (R) */
#if already_a_define
#define fd_drs fd_msr /* Data Rate Select Register (W) */
#endif
uint8_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

/* sun3x - Floppy Control Register bits */
#define FCR_TC 0x01 /* terminal count reset */
#define FCR_EJECT 0x02 /* eject floppy */
#define FCR_MTRON 0x04 /* motor on */
#define FCR_DSEL1 0x08 /* select drive 1 */
#define FCR_DSEL0 0x10 /* select drive 0 */
#define FCR_DSEL(drive) ((drive) ? FCR_DSEL1 : FCR_DSEL0)

/* sun3x - Register offsets */
#define FDC_FCR_OFFSET 0x400
#define FDC_FVR_OFFSET 0x800