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fdvar.h revision 1.2 
      1 /*	$NetBSD: fdvar.h,v 1.2 1998/09/05 15:24:51 pk Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Paul Kranenburg.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #define	FDC_BSIZE	512
     40 #define	FDC_MAXIOSIZE	NBPG	/* XXX should be MAXBSIZE */
     41 
     42 #define FDC_NSTATUS	10
     43 
     44 #ifndef _LOCORE
     45 struct fdcio {
     46 	/*
     47 	 * 82072 (sun4c,sun3x) and 82077 (sun4m) controllers have different
     48 	 * register layout; so we cache some here.
     49 	 */
     50 	volatile u_int8_t	*fdcio_reg_msr;
     51 	volatile u_int8_t	*fdcio_reg_fifo;
     52 	volatile u_int8_t	*fdcio_reg_dor;	/* 82077 only */
     53 	volatile u_int8_t	*fdcio_reg_fcr; /* sun3x floppy control reg */
     54 	volatile u_int8_t	*fdcio_reg_fvr; /* sun3x floppy int. vector */
     55 
     56 	/*
     57 	 * Interrupt state.
     58 	 */
     59 	int	fdcio_istate;
     60 
     61 	/*
     62 	 * IO state.
     63 	 */
     64 	char	*fdcio_data;		/* pseudo-dma data */
     65 	int	fdcio_tc;		/* pseudo-dma Terminal Count */
     66 	u_char	fdcio_status[FDC_NSTATUS];	/* copy of registers */
     67 	int	fdcio_nstat;		/* # of valid status bytes */
     68 
     69 	/*
     70 	 * Statictics.
     71 	 */
     72 	struct	evcnt	fdcio_intrcnt;
     73 };
     74 #endif /* _LOCORE */
     75 
     76 /* istate values */
     77 #define ISTATE_IDLE		0	/* No HW interrupt expected */
     78 #define ISTATE_SPURIOUS		1	/* Spurious HW interrupt detected */
     79 #define ISTATE_SENSEI		2	/* Do SENSEI on next HW interrupt */
     80 #define ISTATE_DMA		3	/* Pseudo-DMA in progress */
     81 #define ISTATE_DONE		4	/* Interrupt processing complete */
     82 
     83 
     84 #define FD_MAX_NSEC 36		/* highest known number of spt - allow for */
     85 				/* 2.88 MB drives */
     86 
     87 #ifndef _LOCORE
     88 struct ne7_fd_formb {
     89 	int cyl, head;
     90 	int transfer_rate;	/* fdreg.h: FDC_???KBPS */
     91 
     92 	union {
     93 		struct fd_form_data {
     94 			/*
     95 			 * DO NOT CHANGE THE LAYOUT OF THIS STRUCTS
     96 			 * it is hardware-dependant since it exactly
     97 			 * matches the byte sequence to write to FDC
     98 			 * during its `format track' operation
     99 			 */
    100 			u_char secshift; /* 0 -> 128, ...; usually 2 -> 512 */
    101 			u_char nsecs;	/* must be <= FD_MAX_NSEC */
    102 			u_char gaplen;	/* GAP 3 length; usually 84 */
    103 			u_char fillbyte; /* usually 0xf6 */
    104 			struct fd_idfield_data {
    105 				/*
    106 				 * data to write into id fields;
    107 				 * for obscure formats, they mustn't match
    108 				 * the real values (but mostly do)
    109 				 */
    110 				u_char cylno;	/* 0 thru 79 (or 39) */
    111 				u_char headno;	/* 0, or 1 */
    112 				u_char secno;	/* starting at 1! */
    113 				u_char secsize;	/* usually 2 */
    114 			} idfields[FD_MAX_NSEC]; /* 0 <= idx < nsecs used */
    115 		} structured;
    116 		u_char raw[1];	/* to have continuous indexed access */
    117 	} format_info;
    118 };
    119 
    120 /* make life easier */
    121 #define fd_formb_secshift   format_info.structured.secshift
    122 #define fd_formb_nsecs      format_info.structured.nsecs
    123 #define fd_formb_gaplen     format_info.structured.gaplen
    124 #define fd_formb_fillbyte   format_info.structured.fillbyte
    125 /* these data must be filled in for(i = 0; i < fd_formb_nsecs; i++) */
    126 #define fd_formb_cylno(i)   format_info.structured.idfields[i].cylno
    127 #define fd_formb_headno(i)  format_info.structured.idfields[i].headno
    128 #define fd_formb_secno(i)   format_info.structured.idfields[i].secno
    129 #define fd_formb_secsize(i) format_info.structured.idfields[i].secsize
    130 #endif /* _LOCORE */
    131