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fdreg.h revision 1.4 
      1 /*	$NetBSD: fdreg.h,v 1.4 1995/06/28 04:31:19 cgd Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1991 The Regents of the University of California.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  *	@(#)fdreg.h	7.1 (Berkeley) 5/9/91
     36  */
     37 
     38 /*
     39  * AT floppy controller registers and bitfields
     40  */
     41 
     42 /* uses NEC765 controller */
     43 #include <dev/ic/nec765reg.h>
     44 
     45 #ifndef LOCORE
     46 struct fdreg_77 {
     47 	u_int8_t	fd_statusA;
     48 	u_int8_t	fd_statusB;
     49 	u_int8_t	fd_dor;		/* Digital Output Register (R/W) */
     50 	u_int8_t	fd_tdr;		/* Tape Control Register (R/W) */
     51 	u_int8_t	fd_msr;		/* Main Status Register (R) */
     52 #define fd_drs		fd_msr		/* Data Rate Select Register (W) */
     53 	u_int8_t	fd_fifo;	/* Data (FIFO) register (R/W) */
     54 	u_int8_t	fd_reserved;
     55 	u_int8_t	fd_dir;		/* Digital Input Register (R) */
     56 #define fd_ccr		fd_dir		/* Configuration Control (W) */
     57 };
     58 
     59 struct fdreg_72 {
     60 	u_int8_t	fd_msr;		/* Main Status Register (R) */
     61 #if already_a_define
     62 #define fd_drs	fd_msr			/* Data Rate Select Register (W) */
     63 #endif
     64 	u_int8_t	fd_fifo;	/* Data (FIFO) register (R/W) */
     65 };
     66 
     67 union fdreg {
     68 	struct fdreg_72 fun72;
     69 	struct fdreg_77 fun77;
     70 };
     71 #endif
     72 
     73 /* Data Select Register bits */
     74 #define DRS_RESET	0x80
     75 #define DRS_POWER	0x40
     76 #define DRS_PLL		0x20
     77 #define	FDC_500KBPS	0x00		/*   500KBPS MFM drive transfer rate */
     78 #define	FDC_300KBPS	0x01		/*   300KBPS MFM drive transfer rate */
     79 #define	FDC_250KBPS	0x02		/*   250KBPS MFM drive transfer rate */
     80 #define	FDC_125KBPS	0x03		/*   125KBPS  FM drive transfer rate */
     81 
     82 /* Digital Output Register bits */
     83 #define	FDO_FDSEL	0x03		/*  floppy device select */
     84 #define	FDO_FRST	0x04		/*  floppy controller reset */
     85 #define	FDO_FDMAEN	0x08		/*  enable floppy DMA and Interrupt */
     86 #define	FDO_MOEN(n)	((1 << n) * 0x10)	/* motor enable */
     87 
     88 #define	FDI_DCHG	0x80		/*   diskette has been changed */
     89 
     90 /* XXX - find a place for these... */
     91 #define NE7CMD_CFG		0x13
     92 #define CFG_EIS			0x40
     93 #define CFG_EFIFO		0x20
     94 #define CFG_POLL		0x10
     95 #define CFG_THRHLD_MASK		0x0f
     96 
     97 #define NE7CMD_LOCK		0x14
     98 #define CFG_LOCK		0x80
     99 
    100 #define NE7CMD_MOTOR		0x0b
    101 #define MOTOR_ON		0x80
    102 
    103 #define NE7CMD_DUMPREG		0x0e
    104 #define NE7CMD_VERSION		0x10
    105 
    106 #define ST1_OVERRUN		0x10
    107 
    108 
    109