sys/dev/disk/fd/fdc.h

   1 /*-
   2  * Copyright (c) 1990 The Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      from:   @(#)fd.c        7.4 (Berkeley) 5/25/91
  30  * $FreeBSD: src/sys/isa/fdc.h,v 1.20.2.3 2002/02/03 14:08:46 nyan Exp $
  31  *
  32  */
  33
  34 enum fdc_type
  35 {
  36         FDC_NE765, FDC_I82077, FDC_NE72065, FDC_UNKNOWN = -1
  37 };
  38
  39
  40 /***********************************************************************\
  41 * Per controller structure.                                             *
  42 \***********************************************************************/
  43 struct fdc_data
  44 {
  45         int     fdcu;           /* our unit number */
  46         int     dmachan;
  47         int     flags;
  48 #define FDC_ATTACHED    0x01
  49 #define FDC_STAT_VALID  0x08
  50 #define FDC_HAS_FIFO    0x10
  51 #define FDC_NEEDS_RESET 0x20
  52 #define FDC_NODMA       0x40
  53 #define FDC_ISPNP       0x80
  54 #define FDC_ISPCMCIA    0x100
  55         struct  fd_data *fd;
  56         int     fdu;            /* the active drive     */
  57         int     state;
  58         int     retry;
  59         int     fdout;          /* mirror of the w/o digital output reg */
  60         u_int   status[7];      /* copy of the registers */
  61         enum    fdc_type fdct;  /* chip version of FDC */
  62         int     fdc_errs;       /* number of logged errors */
  63         struct  bio_queue_head bio_queue;
  64         struct  bio *bio;       /* active buffer */
  65         int     dma_overruns;   /* number of DMA overruns */
  66         struct  resource *res_ioport, *res_ctl, *res_irq, *res_drq;
  67         int     rid_ioport, rid_ctl, rid_irq, rid_drq;
  68         int     port_off;
  69         bus_space_tag_t portt;
  70         bus_space_handle_t porth;
  71         bus_space_tag_t ctlt;
  72         bus_space_handle_t ctlh;
  73         void    *fdc_intr;
  74         device_t fdc_dev;
  75         struct  callout pseudointr_ch;
  76         void    (*fdctl_wr)(struct fdc_data *fdc, u_int8_t v);
  77 };
  78
  79 /***********************************************************************\
  80 * Throughout this file the following conventions will be used:          *
  81 * fd is a pointer to the fd_data struct for the drive in question       *
  82 * fdc is a pointer to the fdc_data struct for the controller            *
  83 * fdu is the floppy drive unit number                                   *
  84 * fdcu is the floppy controller unit number                             *
  85 * fdsu is the floppy drive unit number on that controller. (sub-unit)   *
  86 \***********************************************************************/
  87 typedef int     fdu_t;
  88 typedef int     fdcu_t;
  89 typedef int     fdsu_t;
  90 typedef struct fd_data *fd_p;
  91 typedef struct fdc_data *fdc_p;
  92 typedef enum fdc_type fdc_t;
  93
  94 /*
  95  * fdc maintains a set (1!) of ivars per child of each controller.
  96  */
  97 enum fdc_device_ivars {
  98         FDC_IVAR_FDUNIT,
  99 };
 100
 101 /*
 102  * Simple access macros for the ivars.
 103  */
 104 #define FDC_ACCESSOR(A, B, T)                                           \
 105 static __inline T fdc_get_ ## A(device_t dev)                           \
 106 {                                                                       \
 107         uintptr_t v;                                                    \
 108         BUS_READ_IVAR(device_get_parent(dev), dev, FDC_IVAR_ ## B, &v); \
 109         return (T) v;                                                   \
 110 }
 111 FDC_ACCESSOR(fdunit, FDUNIT, int)
 112
 113 int     fdc_alloc_resources(struct fdc_data *fdc);
 114 void    fdc_release_resources(struct fdc_data *fdc);
 115 int     fdc_attach(device_t dev);
 116 int     fdc_print_child(device_t me, device_t child);
 117 int     fdc_read_ivar(device_t dev, device_t child, int which, u_long *result);
 118 void    fdout_wr(fdc_p fdc, u_int8_t v);
 119 int     fd_cmd(struct fdc_data *fdc, int n_out, ...);
 120
 121 extern  devclass_t fdc_devclass;