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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      from:   @(#)fd.c        7.4 (Berkeley) 5/25/91
  34  * $FreeBSD: src/sys/isa/fdc.h,v 1.20.2.3 2002/02/03 14:08:46 nyan Exp $
  35  * $DragonFly: src/sys/dev/disk/fd/fdc.h,v 1.7 2007/05/21 04:22:23 dillon Exp $
  36  *
  37  */
  38
  39 enum fdc_type
  40 {
  41         FDC_NE765, FDC_I82077, FDC_NE72065, FDC_UNKNOWN = -1
  42 };
  43
  44
  45 /***********************************************************************\
  46 * Per controller structure.                                             *
  47 \***********************************************************************/
  48 struct fdc_data
  49 {
  50         int     fdcu;           /* our unit number */
  51         int     dmachan;
  52         int     flags;
  53 #define FDC_ATTACHED    0x01
  54 #define FDC_STAT_VALID  0x08
  55 #define FDC_HAS_FIFO    0x10
  56 #define FDC_NEEDS_RESET 0x20
  57 #define FDC_NODMA       0x40
  58 #define FDC_ISPNP       0x80
  59 #define FDC_ISPCMCIA    0x100
  60         struct  fd_data *fd;
  61         int     fdu;            /* the active drive     */
  62         int     state;
  63         int     retry;
  64         int     fdout;          /* mirror of the w/o digital output reg */
  65         u_int   status[7];      /* copy of the registers */
  66         enum    fdc_type fdct;  /* chip version of FDC */
  67         int     fdc_errs;       /* number of logged errors */
  68         struct  bio_queue_head bio_queue;
  69         struct  bio *bio;       /* active buffer */
  70         int     dma_overruns;   /* number of DMA overruns */
  71         struct  resource *res_ioport, *res_ctl, *res_irq, *res_drq;
  72         int     rid_ioport, rid_ctl, rid_irq, rid_drq;
  73         int     port_off;
  74         bus_space_tag_t portt;
  75         bus_space_handle_t porth;
  76         bus_space_tag_t ctlt;
  77         bus_space_handle_t ctlh;
  78         void    *fdc_intr;
  79         struct  device *fdc_dev;
  80         struct  callout pseudointr_ch;
  81         void    (*fdctl_wr)(struct fdc_data *fdc, u_int8_t v);
  82 };
  83
  84 /***********************************************************************\
  85 * Throughout this file the following conventions will be used:          *
  86 * fd is a pointer to the fd_data struct for the drive in question       *
  87 * fdc is a pointer to the fdc_data struct for the controller            *
  88 * fdu is the floppy drive unit number                                   *
  89 * fdcu is the floppy controller unit number                             *
  90 * fdsu is the floppy drive unit number on that controller. (sub-unit)   *
  91 \***********************************************************************/
  92 typedef int     fdu_t;
  93 typedef int     fdcu_t;
  94 typedef int     fdsu_t;
  95 typedef struct fd_data *fd_p;
  96 typedef struct fdc_data *fdc_p;
  97 typedef enum fdc_type fdc_t;
  98
  99 /*
 100  * fdc maintains a set (1!) of ivars per child of each controller.
 101  */
 102 enum fdc_device_ivars {
 103         FDC_IVAR_FDUNIT,
 104 };
 105
 106 /*
 107  * Simple access macros for the ivars.
 108  */
 109 #define FDC_ACCESSOR(A, B, T)                                           \
 110 static __inline T fdc_get_ ## A(device_t dev)                           \
 111 {                                                                       \
 112         uintptr_t v;                                                    \
 113         BUS_READ_IVAR(device_get_parent(dev), dev, FDC_IVAR_ ## B, &v); \
 114         return (T) v;                                                   \
 115 }
 116 FDC_ACCESSOR(fdunit, FDUNIT, int)
 117
 118 int     fdc_alloc_resources(struct fdc_data *fdc);
 119 void    fdc_release_resources(struct fdc_data *fdc);
 120 int     fdc_attach(device_t dev);
 121 int     fdc_print_child(device_t me, device_t child);
 122 int     fdc_read_ivar(device_t dev, device_t child, int which, u_long *result);
 123 void    fdout_wr(fdc_p fdc, u_int8_t v);
 124 int     fd_cmd(struct fdc_data *fdc, int n_out, ...);
 125
 126 extern  devclass_t fdc_devclass;