/*      $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