FreeBSD/Linux Kernel Cross Reference
sys/i386/isa/fdc.h

     /*-
      * Copyright (c) 1990 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. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. 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.
     *
     *      from:   @(#)fd.c        7.4 (Berkeley) 5/25/91
     * $FreeBSD$
     *
     */
    
    enum fdc_type
    {
            FDC_NE765, FDC_I82077, FDC_NE72065, FDC_UNKNOWN = -1
    };
    
    
    /***********************************************************************\
    * Per controller structure.                                             *
    \***********************************************************************/
    struct fdc_data
    {
            int     fdcu;           /* our unit number */
            int     baseport;
            int     dmachan;
            int     flags;
    #define FDC_ATTACHED    0x01
    #define FDC_HASFTAPE    0x02
    #define FDC_TAPE_BUSY   0x04
    #define FDC_STAT_VALID  0x08
    #define FDC_HAS_FIFO    0x10
    #define FDC_NEEDS_RESET 0x20
    #ifdef FDC_YE
    #define FDC_PCMCIA      0x40
    #define FDC_UNLOADED    0x80
    #endif
            struct  fd_data *fd;
            int     fdu;            /* the active drive     */
            int     state;
            int     retry;
            int     fdout;          /* mirror of the w/o digital output reg */
            u_int   status[7];      /* copy of the registers */
            enum    fdc_type fdct;  /* chip version of FDC */
            int     fdc_errs;       /* number of logged errors */
            struct  buf_queue_head head;
            struct  buf *bp;        /* active buffer */
    };
    
    /***********************************************************************\
    * Throughout this file the following conventions will be used:          *
    * fd is a pointer to the fd_data struct for the drive in question       *
    * fdc is a pointer to the fdc_data struct for the controller            *
    * fdu is the floppy drive unit number                                   *
    * fdcu is the floppy controller unit number                             *
    * fdsu is the floppy drive unit number on that controller. (sub-unit)   *
    \***********************************************************************/
    typedef int     fdu_t;
    typedef int     fdcu_t;
    typedef int     fdsu_t;
    typedef struct fd_data *fd_p;
    typedef struct fdc_data *fdc_p;
    typedef enum fdc_type fdc_t;
    
    #define FDUNIT(s)       (((s)>>6)&03)
    #define FDTYPE(s)       ((s)&077)

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