freebsd-dev/sys/isa/fdc.h
Bruce Evans e93e63cb39 Fixed corruption of the fd buffer queue. Once upon a time, the active
buffer had to be left on the head of the queue for [bufq]disksort()
to sort against.  This isn't right for devices that can support multiple
active i/o's, and only the fd driver did it.  "Fixing" this in rev.1.36
of ufs_disksubr.c broke the fd driver in much the same way as rev.1.52
of <sys/buf.h> broke it (see rev.1.119).

Bug reported and fix tested by:	dt
1999-01-15 09:15:27 +00:00

92 lines
3.5 KiB
C

/*-
* 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
* $Id: fdc.h,v 1.12 1998/12/12 08:16:01 imp Exp $
*
*/
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)