Home | History | Annotate | Line # | Download | only in dev
fdvar.h revision 1.5 
      1 /*
      2  *	$NetBSD: fdvar.h,v 1.5 1996/12/08 23:40:34 pk Exp $
      3  *
      4  * Copyright (c) 1995 Paul Kranenburg
      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 Paul Kranenburg.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  *
     32  */
     33 
     34 #define	FDC_BSIZE	512
     35 #define	FDC_MAXIOSIZE	NBPG	/* XXX should be MAXBSIZE */
     36 
     37 #define FDC_NSTATUS	10
     38 
     39 #ifndef _LOCORE
     40 struct fdcio {
     41 	/*
     42 	 * 82072 (sun4c) and 82077 (sun4m) controllers have different
     43 	 * register layout; so we cache some here.
     44 	 */
     45 	volatile u_int8_t	*fdcio_reg_msr;
     46 	volatile u_int8_t	*fdcio_reg_fifo;
     47 	volatile u_int8_t	*fdcio_reg_dor;	/* 82077 only */
     48 
     49 	/*
     50 	 * Interrupt state.
     51 	 */
     52 	int	fdcio_istate;
     53 
     54 	/*
     55 	 * IO state.
     56 	 */
     57 	char	*fdcio_data;		/* pseudo-dma data */
     58 	int	fdcio_tc;		/* pseudo-dma Terminal Count */
     59 	u_char	fdcio_status[FDC_NSTATUS];	/* copy of registers */
     60 	int	fdcio_nstat;		/* # of valid status bytes */
     61 
     62 	/*
     63 	 * Statictics.
     64 	 */
     65 	struct	evcnt	fdcio_intrcnt;
     66 };
     67 #endif /* _LOCORE */
     68 
     69 /* istate values */
     70 #define ISTATE_IDLE		0	/* No HW interrupt expected */
     71 #define ISTATE_SPURIOUS		1	/* Spurious HW interrupt detected */
     72 #define ISTATE_SENSEI		2	/* Do SENSEI on next HW interrupt */
     73 #define ISTATE_DMA		3	/* Pseudo-DMA in progress */
     74 #define ISTATE_DONE		4	/* Interrupt processing complete */
     75 
     76 
     77 #define FD_MAX_NSEC 36		/* highest known number of spt - allow for */
     78 				/* 2.88 MB drives */
     79 
     80 #ifndef _LOCORE
     81 struct ne7_fd_formb {
     82 	int cyl, head;
     83 	int transfer_rate;	/* fdreg.h: FDC_???KBPS */
     84 
     85 	union {
     86 		struct fd_form_data {
     87 			/*
     88 			 * DO NOT CHANGE THE LAYOUT OF THIS STRUCTS
     89 			 * it is hardware-dependant since it exactly
     90 			 * matches the byte sequence to write to FDC
     91 			 * during its `format track' operation
     92 			 */
     93 			u_char secshift; /* 0 -> 128, ...; usually 2 -> 512 */
     94 			u_char nsecs;	/* must be <= FD_MAX_NSEC */
     95 			u_char gaplen;	/* GAP 3 length; usually 84 */
     96 			u_char fillbyte; /* usually 0xf6 */
     97 			struct fd_idfield_data {
     98 				/*
     99 				 * data to write into id fields;
    100 				 * for obscure formats, they mustn't match
    101 				 * the real values (but mostly do)
    102 				 */
    103 				u_char cylno;	/* 0 thru 79 (or 39) */
    104 				u_char headno;	/* 0, or 1 */
    105 				u_char secno;	/* starting at 1! */
    106 				u_char secsize;	/* usually 2 */
    107 			} idfields[FD_MAX_NSEC]; /* 0 <= idx < nsecs used */
    108 		} structured;
    109 		u_char raw[1];	/* to have continuous indexed access */
    110 	} format_info;
    111 };
    112 
    113 /* make life easier */
    114 #define fd_formb_secshift   format_info.structured.secshift
    115 #define fd_formb_nsecs      format_info.structured.nsecs
    116 #define fd_formb_gaplen     format_info.structured.gaplen
    117 #define fd_formb_fillbyte   format_info.structured.fillbyte
    118 /* these data must be filled in for(i = 0; i < fd_formb_nsecs; i++) */
    119 #define fd_formb_cylno(i)   format_info.structured.idfields[i].cylno
    120 #define fd_formb_headno(i)  format_info.structured.idfields[i].headno
    121 #define fd_formb_secno(i)   format_info.structured.idfields[i].secno
    122 #define fd_formb_secsize(i) format_info.structured.idfields[i].secsize
    123 #endif /* _LOCORE */
    124