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      1 /*	$NetBSD: fdvar.h,v 1.15 2011/06/30 20:09:36 wiz 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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #define	FD_BSIZE(fd)	(128 * (1 << fd->sc_type->secsize))
     33 #define	FDC_MAXIOSIZE	NBPG	/* XXX should be MAXBSIZE */
     34 
     35 #define FDC_NSTATUS	10
     36 
     37 #ifndef _LOCORE
     38 struct fdcio {
     39 	bus_space_handle_t	fdcio_handle;
     40 	/*
     41 	 * 82072 (sun4c) and 82077 (sun4m) controllers have different
     42 	 * register layout; so we cache offsets to the registers here.
     43 	 */
     44 	u_int	fdcio_reg_msr;
     45 	u_int	fdcio_reg_fifo;
     46 	u_int	fdcio_reg_dor;		/* 82077 only */
     47 	u_int	fdcio_reg_dir;		/* 82077 only */
     48 
     49 	/*
     50 	 * Interrupt state.
     51 	 */
     52 	int	fdcio_itask;
     53 	int	fdcio_istatus;
     54 
     55 	/*
     56 	 * IO state.
     57 	 */
     58 	char	*fdcio_data;		/* pseudo-DMA data */
     59 	int	fdcio_tc;		/* pseudo-DMA Terminal Count */
     60 	u_char	fdcio_status[FDC_NSTATUS];	/* copy of registers */
     61 	int	fdcio_nstat;		/* # of valid status bytes */
     62 
     63 	/*
     64 	 * Statictics.
     65 	 */
     66 	struct	evcnt	fdcio_intrcnt;
     67 };
     68 #endif /* _LOCORE */
     69 
     70 /* itask values */
     71 #define FDC_ITASK_NONE		0	/* No HW interrupt expected */
     72 #define FDC_ITASK_SENSEI	1	/* Do SENSEI on next HW interrupt */
     73 #define FDC_ITASK_DMA		2	/* Do Pseudo-DMA */
     74 #define FDC_ITASK_RESULT	3	/* Pick up command results */
     75 
     76 /* istatus values */
     77 #define FDC_ISTATUS_NONE	0	/* No status available */
     78 #define FDC_ISTATUS_SPURIOUS	1	/* Spurious HW interrupt detected */
     79 #define FDC_ISTATUS_ERROR	2	/* Operation completed abnormally */
     80 #define FDC_ISTATUS_DONE	3	/* Operation completed normally */
     81 
     82 
     83 #define FD_MAX_NSEC 36		/* highest known number of spt - allow for */
     84 				/* 2.88 MB drives */
     85 
     86 #ifndef _LOCORE
     87 struct ne7_fd_formb {
     88 	int cyl, head;
     89 	int transfer_rate;	/* fdreg.h: FDC_???KBPS */
     90 
     91 	union {
     92 		struct fd_form_data {
     93 			/*
     94 			 * DO NOT CHANGE THE LAYOUT OF THIS STRUCTS
     95 			 * it is hardware-dependent since it exactly
     96 			 * matches the byte sequence to write to FDC
     97 			 * during its `format track' operation
     98 			 */
     99 			u_char secshift; /* 0 -> 128, ...; usually 2 -> 512 */
    100 			u_char nsecs;	/* must be <= FD_MAX_NSEC */
    101 			u_char gaplen;	/* GAP 3 length; usually 84 */
    102 			u_char fillbyte; /* usually 0xf6 */
    103 			struct fd_idfield_data {
    104 				/*
    105 				 * data to write into id fields;
    106 				 * for obscure formats, they mustn't match
    107 				 * the real values (but mostly do)
    108 				 */
    109 				u_char cylno;	/* 0 thru 79 (or 39) */
    110 				u_char headno;	/* 0, or 1 */
    111 				u_char secno;	/* starting at 1! */
    112 				u_char secsize;	/* usually 2 */
    113 			} idfields[FD_MAX_NSEC]; /* 0 <= idx < nsecs used */
    114 		} structured;
    115 		u_char raw[1];	/* to have continuous indexed access */
    116 	} format_info;
    117 };
    118 
    119 /* make life easier */
    120 #define fd_formb_secshift   format_info.structured.secshift
    121 #define fd_formb_nsecs      format_info.structured.nsecs
    122 #define fd_formb_gaplen     format_info.structured.gaplen
    123 #define fd_formb_fillbyte   format_info.structured.fillbyte
    124 /* these data must be filled in for(i = 0; i < fd_formb_nsecs; i++) */
    125 #define fd_formb_cylno(i)   format_info.structured.idfields[i].cylno
    126 #define fd_formb_headno(i)  format_info.structured.idfields[i].headno
    127 #define fd_formb_secno(i)   format_info.structured.idfields[i].secno
    128 #define fd_formb_secsize(i) format_info.structured.idfields[i].secsize
    129 #endif /* _LOCORE */
    130