1852 lines
44 KiB
C
1852 lines
44 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Don Ahn.
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*
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* Copyright (c) 1993, 1994 by
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* jc@irbs.UUCP (John Capo)
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* vak@zebub.msk.su (Serge Vakulenko)
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* ache@astral.msk.su (Andrew A. Chernov)
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*
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* Copyright (c) 1993, 1994, 1995 by
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* joerg_wunsch@uriah.sax.de (Joerg Wunsch)
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* dufault@hda.com (Peter Dufault)
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)fd.c 7.4 (Berkeley) 5/25/91
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* $Id: fd.c,v 1.51 1995/01/27 20:03:07 jkh Exp $
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*
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*/
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#include "ft.h"
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#if NFT < 1
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#undef NFDC
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#endif
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#include "fd.h"
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/* Flags */
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#define FT_PROBE 0x1
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#if NFDC > 0
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/conf.h>
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#include <sys/file.h>
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#include <sys/ioctl.h>
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#include <machine/clock.h>
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#include <machine/ioctl_fd.h>
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#include <sys/disklabel.h>
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#include <sys/diskslice.h>
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#include <sys/buf.h>
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#include <sys/uio.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/syslog.h>
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#include <sys/devconf.h>
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#include <sys/dkstat.h>
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#include <i386/isa/isa.h>
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#include <i386/isa/isa_device.h>
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#include <i386/isa/fdreg.h>
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#include <i386/isa/fdc.h>
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#include <i386/isa/rtc.h>
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#include <machine/stdarg.h>
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#if NFT > 0
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#include <sys/ftape.h>
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#include <i386/isa/ftreg.h>
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#endif
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static int fd_goaway(struct kern_devconf *, int);
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static int fdc_goaway(struct kern_devconf *, int);
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static int
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fd_externalize(struct proc *, struct kern_devconf *, void *, size_t);
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/*
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* Templates for the kern_devconf structures used when we attach.
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*/
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static struct kern_devconf kdc_fd[NFD] = { {
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0, 0, 0, /* filled in by kern_devconf.c */
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"fd", 0, { MDDT_DISK, 0 },
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fd_externalize, 0, fd_goaway, DISK_EXTERNALLEN,
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0, /* parent */
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0, /* parentdata */
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DC_UNCONFIGURED, /* state */
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"floppy disk"
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} };
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struct kern_devconf kdc_fdc[NFDC] = { {
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0, 0, 0, /* filled in by kern_devconf.c */
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"fdc", 0, { MDDT_ISA, 0, "bio" },
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isa_generic_externalize, 0, fdc_goaway, ISA_EXTERNALLEN,
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0, /* parent */
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0, /* parentdata */
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DC_UNCONFIGURED, /* state */
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"floppy disk/tape controller"
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} };
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static inline void
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fd_registerdev(int ctlr, int unit)
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{
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if(unit != 0)
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kdc_fd[unit] = kdc_fd[0];
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kdc_fd[unit].kdc_unit = unit;
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kdc_fd[unit].kdc_parent = &kdc_fdc[ctlr];
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kdc_fd[unit].kdc_parentdata = 0;
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dev_attach(&kdc_fd[unit]);
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}
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static inline void
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fdc_registerdev(struct isa_device *dvp)
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{
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int unit = dvp->id_unit;
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if(unit != 0)
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kdc_fdc[unit] = kdc_fdc[0];
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kdc_fdc[unit].kdc_unit = unit;
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kdc_fdc[unit].kdc_parent = &kdc_isa0;
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kdc_fdc[unit].kdc_parentdata = dvp;
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dev_attach(&kdc_fdc[unit]);
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}
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static int
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fdc_goaway(struct kern_devconf *kdc, int force)
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{
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if(force) {
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dev_detach(kdc);
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return 0;
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} else {
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return EBUSY; /* XXX fix */
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}
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}
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static int
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fd_goaway(struct kern_devconf *kdc, int force)
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{
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dev_detach(kdc);
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return 0;
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}
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#define b_cylin b_resid /* XXX now spelled b_cylinder elsewhere */
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/* misuse a flag to identify format operation */
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#define B_FORMAT B_XXX
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/*
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* this biotab field doubles as a field for the physical unit number
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* on the controller
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*/
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#define id_physid id_scsiid
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/* error returns for fd_cmd() */
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#define FD_FAILED -1
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#define FD_NOT_VALID -2
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#define FDC_ERRMAX 100 /* do not log more */
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#define NUMTYPES 14
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#define NUMDENS (NUMTYPES - 6)
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/* These defines (-1) must match index for fd_types */
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#define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
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#define NO_TYPE 0 /* must match NO_TYPE in ft.c */
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#define FD_1720 1
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#define FD_1480 2
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#define FD_1440 3
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#define FD_1200 4
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#define FD_820 5
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#define FD_800 6
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#define FD_720 7
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#define FD_360 8
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#define FD_1480in5_25 9
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#define FD_1440in5_25 10
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#define FD_820in5_25 11
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#define FD_800in5_25 12
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#define FD_720in5_25 13
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#define FD_360in5_25 14
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struct fd_type fd_types[NUMTYPES] =
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{
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{ 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
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{ 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
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{ 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
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{ 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
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{ 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
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{ 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
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{ 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
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{ 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
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{ 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
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{ 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
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{ 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
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{ 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
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{ 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
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{ 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
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};
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#define DRVS_PER_CTLR 2 /* 2 floppies */
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/***********************************************************************\
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* Per controller structure. *
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\***********************************************************************/
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struct fdc_data fdc_data[NFDC];
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/***********************************************************************\
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* Per drive structure. *
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* N per controller (DRVS_PER_CTLR) *
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\***********************************************************************/
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struct fd_data {
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struct fdc_data *fdc; /* pointer to controller structure */
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int fdsu; /* this units number on this controller */
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int type; /* Drive type (FD_1440...) */
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struct fd_type *ft; /* pointer to the type descriptor */
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int flags;
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#define FD_OPEN 0x01 /* it's open */
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#define FD_ACTIVE 0x02 /* it's active */
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#define FD_MOTOR 0x04 /* motor should be on */
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#define FD_MOTOR_WAIT 0x08 /* motor coming up */
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int skip;
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int hddrv;
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#define FD_NO_TRACK -2
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int track; /* where we think the head is */
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int options; /* user configurable options, see ioctl_fd.h */
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int dkunit; /* disk stats unit number */
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} fd_data[NFD];
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/***********************************************************************\
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* Throughout this file the following conventions will be used: *
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* fd is a pointer to the fd_data struct for the drive in question *
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* fdc is a pointer to the fdc_data struct for the controller *
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* fdu is the floppy drive unit number *
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* fdcu is the floppy controller unit number *
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* fdsu is the floppy drive unit number on that controller. (sub-unit) *
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\***********************************************************************/
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#if NFT > 0
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int ftopen(dev_t, int);
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int ftintr(ftu_t ftu);
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int ftclose(dev_t, int);
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void ftstrategy(struct buf *);
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int ftioctl(dev_t, int, caddr_t, int, struct proc *);
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int ftdump(dev_t);
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int ftsize(dev_t);
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int ftattach(struct isa_device *, struct isa_device *);
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#endif
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/* autoconfig functions */
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static int fdprobe(struct isa_device *);
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static int fdattach(struct isa_device *);
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/* exported functions */
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int fdsize (dev_t);
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void fdintr(fdcu_t);
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int Fdopen(dev_t, int, int, struct proc *);
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int fdclose(dev_t, int, int, struct proc *);
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void fdstrategy(struct buf *);
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int fdioctl(dev_t, int, caddr_t, int, struct proc *);
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/* needed for ft driver, thus exported */
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int in_fdc(fdcu_t);
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int out_fdc(fdcu_t, int);
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/* internal functions */
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static void set_motor(fdcu_t, int, int);
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# define TURNON 1
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# define TURNOFF 0
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static timeout_t fd_turnoff;
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static timeout_t fd_motor_on;
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static void fd_turnon(fdu_t);
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static void fdc_reset(fdc_p);
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static void fdstart(fdcu_t);
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static timeout_t fd_timeout;
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static timeout_t fd_pseudointr;
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static int fdstate(fdcu_t, fdc_p);
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static int retrier(fdcu_t);
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static int fdformat(dev_t, struct fd_formb *, struct proc *);
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#define DEVIDLE 0
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#define FINDWORK 1
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#define DOSEEK 2
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#define SEEKCOMPLETE 3
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#define IOCOMPLETE 4
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#define RECALCOMPLETE 5
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#define STARTRECAL 6
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#define RESETCTLR 7
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#define SEEKWAIT 8
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#define RECALWAIT 9
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#define MOTORWAIT 10
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#define IOTIMEDOUT 11
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#ifdef DEBUG
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char *fdstates[] =
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{
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"DEVIDLE",
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"FINDWORK",
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"DOSEEK",
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"SEEKCOMPLETE",
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"IOCOMPLETE",
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"RECALCOMPLETE",
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"STARTRECAL",
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"RESETCTLR",
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"SEEKWAIT",
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"RECALWAIT",
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"MOTORWAIT",
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"IOTIMEDOUT"
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};
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/* CAUTION: fd_debug causes huge amounts of logging output */
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int fd_debug = 0;
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#define TRACE0(arg) if(fd_debug) printf(arg)
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#define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2)
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#else /* DEBUG */
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#define TRACE0(arg)
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#define TRACE1(arg1, arg2)
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#endif /* DEBUG */
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/* autoconfig structure */
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struct isa_driver fdcdriver = {
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fdprobe, fdattach, "fdc",
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};
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struct isa_device *fdcdevs[NFDC];
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/*
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* Provide hw.devconf information.
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*/
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static int
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fd_externalize(struct proc *p, struct kern_devconf *kdc,
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void *userp, size_t len)
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{
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return disk_externalize(fd_data[kdc->kdc_unit].fdsu, userp, &len);
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}
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static int
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fdc_externalize(struct proc *p, struct kern_devconf *kdc,
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void *userp, size_t len)
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{
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return isa_externalize(fdcdevs[kdc->kdc_unit], userp, &len);
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}
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static int
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fdc_err(fdcu_t fdcu, const char *s)
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{
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fdc_data[fdcu].fdc_errs++;
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if(fdc_data[fdcu].fdc_errs < FDC_ERRMAX)
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printf("fdc%d: %s: ", fdcu, s);
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else if(fdc_data[fdcu].fdc_errs == FDC_ERRMAX)
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printf("fdc%d: too many errors, not logging any more\n",
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fdcu);
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return FD_FAILED;
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}
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/*
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* fd_cmd: Send a command to the chip. Takes a varargs with this structure:
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* Unit number,
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* # of output bytes, output bytes as ints ...,
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* # of input bytes, input bytes as ints ...
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*/
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int
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fd_cmd(fdcu_t fdcu, int n_out, ...)
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{
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u_char cmd;
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int n_in;
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int n;
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va_list ap;
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va_start(ap, n_out);
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cmd = (u_char)(va_arg(ap, int));
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va_end(ap);
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va_start(ap, n_out);
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for (n = 0; n < n_out; n++)
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{
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if (out_fdc(fdcu, va_arg(ap, int)) < 0)
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{
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char msg[50];
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sprintf(msg,
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"cmd %x failed at out byte %d of %d\n",
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cmd, n + 1, n_out);
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return fdc_err(fdcu, msg);
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}
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}
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n_in = va_arg(ap, int);
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for (n = 0; n < n_in; n++)
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{
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int *ptr = va_arg(ap, int *);
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if (fd_in(fdcu, ptr) < 0)
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{
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char msg[50];
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sprintf(msg,
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"cmd %02x failed at in byte %d of %d\n",
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cmd, n + 1, n_in);
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return fdc_err(fdcu, msg);
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}
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}
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return 0;
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}
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int
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fd_sense_drive_status(fdc_p fdc, int *st3p)
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{
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int st3;
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if (fd_cmd(fdc->fdcu, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
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{
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return fdc_err(fdc->fdcu, "Sense Drive Status failed.\n");
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}
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if (st3p)
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*st3p = st3;
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return 0;
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}
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int
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fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
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{
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int st0, cyl;
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int ret = fd_cmd(fdc->fdcu, 1, NE7CMD_SENSEI, 1, &st0);
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if (ret)
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{
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(void)fdc_err(fdc->fdcu,
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"sense intr err reading stat reg 0\n");
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return ret;
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}
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if (st0p)
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*st0p = st0;
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if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV)
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{
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/*
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* There doesn't seem to have been an interrupt.
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*/
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return FD_NOT_VALID;
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}
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if (fd_in(fdc->fdcu, &cyl) < 0)
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{
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return fdc_err(fdc->fdcu, "can't get cyl num\n");
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}
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if (cylp)
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*cylp = cyl;
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return 0;
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}
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int
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fd_read_status(fdc_p fdc, int fdsu)
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{
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int i, ret;
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for (i = 0; i < 7; i++)
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{
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if ((ret = fd_in(fdc->fdcu, fdc->status + i)))
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break;
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}
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if (ret == 0)
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fdc->flags |= FDC_STAT_VALID;
|
|
else
|
|
fdc->flags &= ~FDC_STAT_VALID;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************/
|
|
/* autoconfiguration stuff */
|
|
/****************************************************************************/
|
|
|
|
/*
|
|
* probe for existance of controller
|
|
*/
|
|
static int
|
|
fdprobe(struct isa_device *dev)
|
|
{
|
|
fdcu_t fdcu = dev->id_unit;
|
|
if(fdc_data[fdcu].flags & FDC_ATTACHED)
|
|
{
|
|
printf("fdc: same unit (%d) used multiple times\n", fdcu);
|
|
return 0;
|
|
}
|
|
|
|
fdcdevs[fdcu] = dev;
|
|
fdc_data[fdcu].baseport = dev->id_iobase;
|
|
|
|
/* First - lets reset the floppy controller */
|
|
outb(dev->id_iobase+FDOUT, 0);
|
|
DELAY(100);
|
|
outb(dev->id_iobase+FDOUT, FDO_FRST);
|
|
|
|
/* see if it can handle a command */
|
|
if (fd_cmd(fdcu,
|
|
3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
|
|
0))
|
|
{
|
|
return(0);
|
|
}
|
|
kdc_fdc[fdcu].kdc_state = DC_IDLE;
|
|
return (IO_FDCSIZE);
|
|
}
|
|
|
|
/*
|
|
* wire controller into system, look for floppy units
|
|
*/
|
|
static int
|
|
fdattach(struct isa_device *dev)
|
|
{
|
|
unsigned fdt;
|
|
fdu_t fdu;
|
|
fdcu_t fdcu = dev->id_unit;
|
|
fdc_p fdc = fdc_data + fdcu;
|
|
fd_p fd;
|
|
int fdsu, st0, st3, i;
|
|
struct isa_device *fdup;
|
|
int ic_type = 0;
|
|
|
|
fdc_registerdev(dev);
|
|
|
|
fdc->fdcu = fdcu;
|
|
fdc->flags |= FDC_ATTACHED;
|
|
fdc->dmachan = dev->id_drq;
|
|
fdc->state = DEVIDLE;
|
|
/* reset controller, turn motor off, clear fdout mirror reg */
|
|
outb(fdc->baseport + FDOUT, ((fdc->fdout = 0)));
|
|
printf("fdc%d: ", fdcu);
|
|
|
|
/* check for each floppy drive */
|
|
for (fdup = isa_biotab_fdc; fdup->id_driver != 0; fdup++) {
|
|
if (fdup->id_iobase != dev->id_iobase)
|
|
continue;
|
|
fdu = fdup->id_unit;
|
|
fd = &fd_data[fdu];
|
|
if (fdu >= (NFD+NFT))
|
|
continue;
|
|
fdsu = fdup->id_physid;
|
|
/* look up what bios thinks we have */
|
|
switch (fdu) {
|
|
case 0: fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
|
|
break;
|
|
case 1: fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
|
|
break;
|
|
default: fdt = RTCFDT_NONE;
|
|
break;
|
|
}
|
|
/* is there a unit? */
|
|
if ((fdt == RTCFDT_NONE)
|
|
#if NFT > 0
|
|
|| (fdsu >= DRVS_PER_CTLR)) {
|
|
#else
|
|
) {
|
|
fd->type = NO_TYPE;
|
|
#endif
|
|
#if NFT > 0
|
|
/* If BIOS says no floppy, or > 2nd device */
|
|
/* Probe for and attach a floppy tape. */
|
|
if ((dev->id_flags & FT_PROBE) && ftattach(dev, fdup))
|
|
continue;
|
|
if (fdsu < DRVS_PER_CTLR)
|
|
fd->type = NO_TYPE;
|
|
#endif
|
|
continue;
|
|
}
|
|
|
|
/* select it */
|
|
set_motor(fdcu, fdsu, TURNON);
|
|
DELAY(1000000); /* 1 sec */
|
|
|
|
if (ic_type == 0 &&
|
|
fd_cmd(fdcu, 1, NE7CMD_VERSION, 1, &ic_type) == 0)
|
|
{
|
|
ic_type = (u_char)ic_type;
|
|
switch( ic_type ) {
|
|
case 0x80:
|
|
printf("(NEC 765)");
|
|
fdc->fdct = FDC_NE765;
|
|
break;
|
|
case 0x81:
|
|
printf("(Intel 82077)");
|
|
fdc->fdct = FDC_I82077;
|
|
break;
|
|
case 0x90:
|
|
printf("(NEC 72065B)");
|
|
fdc->fdct = FDC_NE72065;
|
|
break;
|
|
default:
|
|
printf("(unknown IC type %02x)", ic_type);
|
|
fdc->fdct = FDC_UNKNOWN;
|
|
break;
|
|
}
|
|
}
|
|
if ((fd_cmd(fdcu, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) &&
|
|
(st3 & NE7_ST3_T0)) {
|
|
/* if at track 0, first seek inwards */
|
|
/* seek some steps: */
|
|
(void)fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0);
|
|
DELAY(300000); /* ...wait a moment... */
|
|
(void)fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
|
|
}
|
|
|
|
/* If we're at track 0 first seek inwards. */
|
|
if ((fd_sense_drive_status(fdc, &st3) == 0) &&
|
|
(st3 & NE7_ST3_T0)) {
|
|
/* Seek some steps... */
|
|
if (fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
|
|
/* ...wait a moment... */
|
|
DELAY(300000);
|
|
/* make ctrlr happy: */
|
|
(void)fd_sense_int(fdc, 0, 0);
|
|
}
|
|
}
|
|
|
|
for(i = 0; i < 2; i++) {
|
|
/*
|
|
* we must recalibrate twice, just in case the
|
|
* heads have been beyond cylinder 76, since most
|
|
* FDCs still barf when attempting to recalibrate
|
|
* more than 77 steps
|
|
*/
|
|
/* go back to 0: */
|
|
if (fd_cmd(fdcu, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
|
|
/* a second being enough for full stroke seek*/
|
|
DELAY(i == 0? 1000000: 300000);
|
|
|
|
/* anything responding? */
|
|
if (fd_sense_int(fdc, &st0, 0) == 0 &&
|
|
(st0 & NE7_ST0_EC) == 0)
|
|
break; /* already probed succesfully */
|
|
}
|
|
}
|
|
|
|
set_motor(fdcu, fdsu, TURNOFF);
|
|
|
|
if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
|
|
continue;
|
|
|
|
fd->track = FD_NO_TRACK;
|
|
fd->fdc = fdc;
|
|
fd->fdsu = fdsu;
|
|
fd->options = 0;
|
|
printf(" [%d: fd%d: ", fdsu, fdu);
|
|
|
|
switch (fdt) {
|
|
case RTCFDT_12M:
|
|
printf("1.2MB 5.25in]");
|
|
fd->type = FD_1200;
|
|
break;
|
|
case RTCFDT_144M:
|
|
printf("1.44MB 3.5in]");
|
|
fd->type = FD_1440;
|
|
break;
|
|
case RTCFDT_288M:
|
|
printf("2.88MB 3.5in - 1.44MB mode]");
|
|
fd->type = FD_1440;
|
|
break;
|
|
case RTCFDT_360K:
|
|
printf("360KB 5.25in]");
|
|
fd->type = FD_360;
|
|
break;
|
|
case RTCFDT_720K:
|
|
printf("720KB 3.5in]");
|
|
fd->type = FD_720;
|
|
break;
|
|
default:
|
|
printf("unknown]");
|
|
fd->type = NO_TYPE;
|
|
break;
|
|
}
|
|
fd_registerdev(fdcu, fdu);
|
|
kdc_fd[fdu].kdc_state = DC_IDLE;
|
|
if (dk_ndrive < DK_NDRIVE) {
|
|
sprintf(dk_names[dk_ndrive], "fd%d", fdu);
|
|
/*
|
|
* XXX assume rate is FDC_500KBPS.
|
|
*/
|
|
dk_wpms[dk_ndrive] = 500000 / 8 / 2;
|
|
fd->dkunit = dk_ndrive++;
|
|
} else {
|
|
fd->dkunit = -1;
|
|
}
|
|
}
|
|
printf("\n");
|
|
|
|
return (1);
|
|
}
|
|
|
|
int
|
|
fdsize(dev_t dev)
|
|
{
|
|
return(0);
|
|
}
|
|
|
|
/****************************************************************************/
|
|
/* motor control stuff */
|
|
/* remember to not deselect the drive we're working on */
|
|
/****************************************************************************/
|
|
static void
|
|
set_motor(fdcu_t fdcu, int fdsu, int turnon)
|
|
{
|
|
int fdout = fdc_data[fdcu].fdout;
|
|
int needspecify = 0;
|
|
|
|
if(turnon) {
|
|
fdout &= ~FDO_FDSEL;
|
|
fdout |= (FDO_MOEN0 << fdsu) + fdsu;
|
|
} else
|
|
fdout &= ~(FDO_MOEN0 << fdsu);
|
|
|
|
if(!turnon
|
|
&& (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
|
|
/* gonna turn off the last drive, put FDC to bed */
|
|
fdout &= ~ (FDO_FRST|FDO_FDMAEN);
|
|
else {
|
|
/* make sure controller is selected and specified */
|
|
if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
|
|
needspecify = 1;
|
|
fdout |= (FDO_FRST|FDO_FDMAEN);
|
|
}
|
|
|
|
outb(fdc_data[fdcu].baseport+FDOUT, fdout);
|
|
fdc_data[fdcu].fdout = fdout;
|
|
kdc_fdc[fdcu].kdc_state = (fdout & FDO_FRST)? DC_BUSY: DC_IDLE;
|
|
TRACE1("[0x%x->FDOUT]", fdout);
|
|
|
|
if(needspecify) {
|
|
/*
|
|
* XXX
|
|
* special case: since we have just woken up the FDC
|
|
* from its sleep, we silently assume the command will
|
|
* be accepted, and do not test for a timeout
|
|
*/
|
|
(void)fd_cmd(fdcu, 3, NE7CMD_SPECIFY,
|
|
NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
|
|
0);
|
|
}
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static void
|
|
fd_turnoff(void *arg1)
|
|
{
|
|
fdu_t fdu = (fdu_t)arg1;
|
|
int s;
|
|
fd_p fd = fd_data + fdu;
|
|
|
|
TRACE1("[fd%d: turnoff]", fdu);
|
|
s = splbio();
|
|
fd->flags &= ~FD_MOTOR;
|
|
set_motor(fd->fdc->fdcu, fd->fdsu, TURNOFF);
|
|
splx(s);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static void
|
|
fd_motor_on(void *arg1)
|
|
{
|
|
fdu_t fdu = (fdu_t)arg1;
|
|
int s;
|
|
|
|
fd_p fd = fd_data + fdu;
|
|
s = splbio();
|
|
fd->flags &= ~FD_MOTOR_WAIT;
|
|
if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
|
|
{
|
|
fdintr(fd->fdc->fdcu);
|
|
}
|
|
splx(s);
|
|
}
|
|
|
|
static void
|
|
fd_turnon(fdu_t fdu)
|
|
{
|
|
fd_p fd = fd_data + fdu;
|
|
if(!(fd->flags & FD_MOTOR))
|
|
{
|
|
fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
|
|
set_motor(fd->fdc->fdcu, fd->fdsu, TURNON);
|
|
timeout(fd_motor_on, (caddr_t)fdu, hz); /* in 1 sec its ok */
|
|
}
|
|
}
|
|
|
|
static void
|
|
fdc_reset(fdc_p fdc)
|
|
{
|
|
fdcu_t fdcu = fdc->fdcu;
|
|
|
|
/* Try a reset, keep motor on */
|
|
outb(fdc->baseport + FDOUT, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
|
|
TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
|
|
DELAY(100);
|
|
/* enable FDC, but defer interrupts a moment */
|
|
outb(fdc->baseport + FDOUT, fdc->fdout & ~FDO_FDMAEN);
|
|
TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
|
|
DELAY(100);
|
|
outb(fdc->baseport + FDOUT, fdc->fdout);
|
|
TRACE1("[0x%x->FDOUT]", fdc->fdout);
|
|
|
|
/* XXX after a reset, silently believe the FDC will accept commands */
|
|
(void)fd_cmd(fdcu, 3, NE7CMD_SPECIFY,
|
|
NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
|
|
0);
|
|
}
|
|
|
|
/****************************************************************************/
|
|
/* fdc in/out */
|
|
/****************************************************************************/
|
|
int
|
|
in_fdc(fdcu_t fdcu)
|
|
{
|
|
int baseport = fdc_data[fdcu].baseport;
|
|
int i, j = 100000;
|
|
while ((i = inb(baseport+FDSTS) & (NE7_DIO|NE7_RQM))
|
|
!= (NE7_DIO|NE7_RQM) && j-- > 0)
|
|
if (i == NE7_RQM)
|
|
return fdc_err(fdcu, "ready for output in input");
|
|
if (j <= 0)
|
|
return fdc_err(fdcu, "input ready timeout");
|
|
#ifdef DEBUG
|
|
i = inb(baseport+FDDATA);
|
|
TRACE1("[FDDATA->0x%x]", (unsigned char)i);
|
|
return(i);
|
|
#else
|
|
return inb(baseport+FDDATA);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* fd_in: Like in_fdc, but allows you to see if it worked.
|
|
*/
|
|
int
|
|
fd_in(fdcu_t fdcu, int *ptr)
|
|
{
|
|
int baseport = fdc_data[fdcu].baseport;
|
|
int i, j = 100000;
|
|
while ((i = inb(baseport+FDSTS) & (NE7_DIO|NE7_RQM))
|
|
!= (NE7_DIO|NE7_RQM) && j-- > 0)
|
|
if (i == NE7_RQM)
|
|
return fdc_err(fdcu, "ready for output in input");
|
|
if (j <= 0)
|
|
return fdc_err(fdcu, "input ready timeout");
|
|
#ifdef DEBUG
|
|
i = inb(baseport+FDDATA);
|
|
TRACE1("[FDDATA->0x%x]", (unsigned char)i);
|
|
*ptr = i;
|
|
return 0;
|
|
#else
|
|
i = inb(baseport+FDDATA);
|
|
if (ptr)
|
|
*ptr = i;
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
int
|
|
out_fdc(fdcu_t fdcu, int x)
|
|
{
|
|
int baseport = fdc_data[fdcu].baseport;
|
|
int i;
|
|
|
|
/* Check that the direction bit is set */
|
|
i = 100000;
|
|
while ((inb(baseport+FDSTS) & NE7_DIO) && i-- > 0);
|
|
if (i <= 0) return fdc_err(fdcu, "direction bit not set");
|
|
|
|
/* Check that the floppy controller is ready for a command */
|
|
i = 100000;
|
|
while ((inb(baseport+FDSTS) & NE7_RQM) == 0 && i-- > 0);
|
|
if (i <= 0) return fdc_err(fdcu, "output ready timeout");
|
|
|
|
/* Send the command and return */
|
|
outb(baseport+FDDATA, x);
|
|
TRACE1("[0x%x->FDDATA]", x);
|
|
return (0);
|
|
}
|
|
|
|
/****************************************************************************/
|
|
/* fdopen/fdclose */
|
|
/****************************************************************************/
|
|
int
|
|
Fdopen(dev_t dev, int flags, int mode, struct proc *p)
|
|
{
|
|
fdu_t fdu = FDUNIT(minor(dev));
|
|
int type = FDTYPE(minor(dev));
|
|
fdc_p fdc;
|
|
int st3;
|
|
|
|
#if NFT > 0
|
|
/* check for a tape open */
|
|
if (type & F_TAPE_TYPE)
|
|
return(ftopen(dev, flags));
|
|
#endif
|
|
/* check bounds */
|
|
if (fdu >= NFD)
|
|
return(ENXIO);
|
|
fdc = fd_data[fdu].fdc;
|
|
if ((fdc == NULL) || (fd_data[fdu].type == NO_TYPE))
|
|
return(ENXIO);
|
|
if (type > NUMDENS)
|
|
return(ENXIO);
|
|
if (type == 0)
|
|
type = fd_data[fdu].type;
|
|
else {
|
|
if (type != fd_data[fdu].type) {
|
|
switch (fd_data[fdu].type) {
|
|
case FD_360:
|
|
return(ENXIO);
|
|
case FD_720:
|
|
if ( type != FD_820
|
|
&& type != FD_800
|
|
)
|
|
return(ENXIO);
|
|
break;
|
|
case FD_1200:
|
|
switch (type) {
|
|
case FD_1480:
|
|
type = FD_1480in5_25;
|
|
break;
|
|
case FD_1440:
|
|
type = FD_1440in5_25;
|
|
break;
|
|
case FD_820:
|
|
type = FD_820in5_25;
|
|
break;
|
|
case FD_800:
|
|
type = FD_800in5_25;
|
|
break;
|
|
case FD_720:
|
|
type = FD_720in5_25;
|
|
break;
|
|
case FD_360:
|
|
type = FD_360in5_25;
|
|
break;
|
|
default:
|
|
return(ENXIO);
|
|
}
|
|
break;
|
|
case FD_1440:
|
|
if ( type != FD_1720
|
|
&& type != FD_1480
|
|
&& type != FD_1200
|
|
&& type != FD_820
|
|
&& type != FD_800
|
|
&& type != FD_720
|
|
)
|
|
return(ENXIO);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
fd_data[fdu].ft = fd_types + type - 1;
|
|
fd_data[fdu].flags |= FD_OPEN;
|
|
kdc_fd[fdu].kdc_state = DC_BUSY;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
fdclose(dev_t dev, int flags, int mode, struct proc *p)
|
|
{
|
|
fdu_t fdu = FDUNIT(minor(dev));
|
|
|
|
#if NFT > 0
|
|
int type = FDTYPE(minor(dev));
|
|
|
|
if (type & F_TAPE_TYPE)
|
|
return ftclose(dev, flags);
|
|
#endif
|
|
fd_data[fdu].flags &= ~FD_OPEN;
|
|
fd_data[fdu].options &= ~FDOPT_NORETRY;
|
|
kdc_fd[fdu].kdc_state = DC_IDLE;
|
|
|
|
return(0);
|
|
}
|
|
|
|
|
|
/****************************************************************************/
|
|
/* fdstrategy */
|
|
/****************************************************************************/
|
|
void
|
|
fdstrategy(struct buf *bp)
|
|
{
|
|
register struct buf *dp;
|
|
long nblocks, blknum;
|
|
int s;
|
|
fdcu_t fdcu;
|
|
fdu_t fdu;
|
|
fdc_p fdc;
|
|
fd_p fd;
|
|
size_t fdblk;
|
|
|
|
fdu = FDUNIT(minor(bp->b_dev));
|
|
fd = &fd_data[fdu];
|
|
fdc = fd->fdc;
|
|
fdcu = fdc->fdcu;
|
|
fdblk = 128 << (fd->ft->secsize);
|
|
|
|
#if NFT > 0
|
|
if (FDTYPE(minor(bp->b_dev)) & F_TAPE_TYPE) {
|
|
/* ft tapes do not (yet) support strategy i/o */
|
|
bp->b_error = ENXIO;
|
|
bp->b_flags |= B_ERROR;
|
|
goto bad;
|
|
}
|
|
/* check for controller already busy with tape */
|
|
if (fdc->flags & FDC_TAPE_BUSY) {
|
|
bp->b_error = EBUSY;
|
|
bp->b_flags |= B_ERROR;
|
|
goto bad;
|
|
}
|
|
#endif
|
|
if (!(bp->b_flags & B_FORMAT)) {
|
|
if ((fdu >= NFD) || (bp->b_blkno < 0)) {
|
|
printf(
|
|
"fdstrat: fd%d: bad request blkno = %lu, bcount = %ld\n",
|
|
fdu, (u_long)bp->b_blkno, bp->b_bcount);
|
|
bp->b_error = EINVAL;
|
|
bp->b_flags |= B_ERROR;
|
|
goto bad;
|
|
}
|
|
if ((bp->b_bcount % fdblk) != 0) {
|
|
bp->b_error = EINVAL;
|
|
bp->b_flags |= B_ERROR;
|
|
goto bad;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Set up block calculations.
|
|
*/
|
|
blknum = (unsigned long) bp->b_blkno * DEV_BSIZE/fdblk;
|
|
nblocks = fd->ft->size;
|
|
if (blknum + (bp->b_bcount / fdblk) > nblocks) {
|
|
if (blknum == nblocks) {
|
|
bp->b_resid = bp->b_bcount;
|
|
} else {
|
|
bp->b_error = ENOSPC;
|
|
bp->b_flags |= B_ERROR;
|
|
}
|
|
goto bad;
|
|
}
|
|
bp->b_cylin = blknum / (fd->ft->sectrac * fd->ft->heads);
|
|
dp = &(fdc->head);
|
|
s = splbio();
|
|
disksort(dp, bp);
|
|
untimeout(fd_turnoff, (caddr_t)fdu); /* a good idea */
|
|
fdstart(fdcu);
|
|
splx(s);
|
|
return;
|
|
|
|
bad:
|
|
biodone(bp);
|
|
}
|
|
|
|
/***************************************************************\
|
|
* fdstart *
|
|
* We have just queued something.. if the controller is not busy *
|
|
* then simulate the case where it has just finished a command *
|
|
* So that it (the interrupt routine) looks on the queue for more*
|
|
* work to do and picks up what we just added. *
|
|
* If the controller is already busy, we need do nothing, as it *
|
|
* will pick up our work when the present work completes *
|
|
\***************************************************************/
|
|
static void
|
|
fdstart(fdcu_t fdcu)
|
|
{
|
|
int s;
|
|
|
|
s = splbio();
|
|
if(fdc_data[fdcu].state == DEVIDLE)
|
|
{
|
|
fdintr(fdcu);
|
|
}
|
|
splx(s);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static void
|
|
fd_timeout(void *arg1)
|
|
{
|
|
fdcu_t fdcu = (fdcu_t)arg1;
|
|
fdu_t fdu = fdc_data[fdcu].fdu;
|
|
int baseport = fdc_data[fdcu].baseport;
|
|
struct buf *dp, *bp;
|
|
int s;
|
|
|
|
dp = &fdc_data[fdcu].head;
|
|
bp = dp->b_actf;
|
|
|
|
/*
|
|
* Due to IBM's brain-dead design, the FDC has a faked ready
|
|
* signal, hardwired to ready == true. Thus, any command
|
|
* issued if there's no diskette in the drive will _never_
|
|
* complete, and must be aborted by resetting the FDC.
|
|
* Many thanks, Big Blue!
|
|
*/
|
|
|
|
s = splbio();
|
|
|
|
TRACE1("fd%d[fd_timeout()]", fdu);
|
|
/* See if the controller is still busy (patiently awaiting data) */
|
|
if(((inb(baseport + FDSTS)) & (NE7_CB|NE7_RQM)) == NE7_CB)
|
|
{
|
|
TRACE1("[FDSTS->0x%x]", inb(baseport + FDSTS));
|
|
/* yup, it is; kill it now */
|
|
fdc_reset(&fdc_data[fdcu]);
|
|
printf("fd%d: Operation timeout\n", fdu);
|
|
}
|
|
|
|
if (bp)
|
|
{
|
|
retrier(fdcu);
|
|
fdc_data[fdcu].status[0] = NE7_ST0_IC_RC;
|
|
fdc_data[fdcu].state = IOTIMEDOUT;
|
|
if( fdc_data[fdcu].retry < 6)
|
|
fdc_data[fdcu].retry = 6;
|
|
}
|
|
else
|
|
{
|
|
fdc_data[fdcu].fd = (fd_p) 0;
|
|
fdc_data[fdcu].fdu = -1;
|
|
fdc_data[fdcu].state = DEVIDLE;
|
|
}
|
|
fdintr(fdcu);
|
|
splx(s);
|
|
}
|
|
|
|
/* just ensure it has the right spl */
|
|
/* ARGSUSED */
|
|
static void
|
|
fd_pseudointr(void *arg1)
|
|
{
|
|
fdcu_t fdcu = (fdcu_t)arg1;
|
|
int s;
|
|
|
|
s = splbio();
|
|
fdintr(fdcu);
|
|
splx(s);
|
|
}
|
|
|
|
/***********************************************************************\
|
|
* fdintr *
|
|
* keep calling the state machine until it returns a 0 *
|
|
* ALWAYS called at SPLBIO *
|
|
\***********************************************************************/
|
|
void
|
|
fdintr(fdcu_t fdcu)
|
|
{
|
|
fdc_p fdc = fdc_data + fdcu;
|
|
#if NFT > 0
|
|
fdu_t fdu = fdc->fdu;
|
|
|
|
if (fdc->flags & FDC_TAPE_BUSY)
|
|
(ftintr(fdu));
|
|
else
|
|
#endif
|
|
while(fdstate(fdcu, fdc))
|
|
;
|
|
}
|
|
|
|
/***********************************************************************\
|
|
* The controller state machine. *
|
|
* if it returns a non zero value, it should be called again immediatly *
|
|
\***********************************************************************/
|
|
static int
|
|
fdstate(fdcu_t fdcu, fdc_p fdc)
|
|
{
|
|
int read, format, head, sec = 0, i = 0, sectrac, st0, cyl, st3;
|
|
unsigned long blknum;
|
|
fdu_t fdu = fdc->fdu;
|
|
fd_p fd;
|
|
register struct buf *dp, *bp;
|
|
struct fd_formb *finfo = NULL;
|
|
size_t fdblk;
|
|
|
|
dp = &(fdc->head);
|
|
bp = dp->b_actf;
|
|
if(!bp)
|
|
{
|
|
/***********************************************\
|
|
* nothing left for this controller to do *
|
|
* Force into the IDLE state, *
|
|
\***********************************************/
|
|
fdc->state = DEVIDLE;
|
|
if(fdc->fd)
|
|
{
|
|
printf("unexpected valid fd pointer (fdu = %d)\n",
|
|
fdc->fdu);
|
|
fdc->fd = (fd_p) 0;
|
|
fdc->fdu = -1;
|
|
}
|
|
TRACE1("[fdc%d IDLE]", fdcu);
|
|
return(0);
|
|
}
|
|
fdu = FDUNIT(minor(bp->b_dev));
|
|
fd = fd_data + fdu;
|
|
fdblk = 128 << fd->ft->secsize;
|
|
if (fdc->fd && (fd != fdc->fd))
|
|
{
|
|
printf("confused fd pointers\n");
|
|
}
|
|
read = bp->b_flags & B_READ;
|
|
format = bp->b_flags & B_FORMAT;
|
|
if(format)
|
|
finfo = (struct fd_formb *)bp->b_un.b_addr;
|
|
TRACE1("fd%d", fdu);
|
|
TRACE1("[%s]", fdstates[fdc->state]);
|
|
TRACE1("(0x%x)", fd->flags);
|
|
untimeout(fd_turnoff, (caddr_t)fdu);
|
|
timeout(fd_turnoff, (caddr_t)fdu, 4 * hz);
|
|
switch (fdc->state)
|
|
{
|
|
case DEVIDLE:
|
|
case FINDWORK: /* we have found new work */
|
|
fdc->retry = 0;
|
|
fd->skip = 0;
|
|
fdc->fd = fd;
|
|
fdc->fdu = fdu;
|
|
outb(fdc->baseport+FDCTL, fd->ft->trans);
|
|
TRACE1("[0x%x->FDCTL]", fd->ft->trans);
|
|
/*******************************************************\
|
|
* If the next drive has a motor startup pending, then *
|
|
* it will start up in it's own good time *
|
|
\*******************************************************/
|
|
if(fd->flags & FD_MOTOR_WAIT)
|
|
{
|
|
fdc->state = MOTORWAIT;
|
|
return(0); /* come back later */
|
|
}
|
|
/*******************************************************\
|
|
* Maybe if it's not starting, it SHOULD be starting *
|
|
\*******************************************************/
|
|
if (!(fd->flags & FD_MOTOR))
|
|
{
|
|
fdc->state = MOTORWAIT;
|
|
fd_turnon(fdu);
|
|
return(0);
|
|
}
|
|
else /* at least make sure we are selected */
|
|
{
|
|
set_motor(fdcu, fd->fdsu, TURNON);
|
|
}
|
|
fdc->state = DOSEEK;
|
|
break;
|
|
case DOSEEK:
|
|
if (bp->b_cylin == fd->track)
|
|
{
|
|
fdc->state = SEEKCOMPLETE;
|
|
break;
|
|
}
|
|
if (fd_cmd(fdcu, 3, NE7CMD_SEEK,
|
|
fd->fdsu, bp->b_cylin * fd->ft->steptrac,
|
|
0))
|
|
{
|
|
/*
|
|
* seek command not accepted, looks like
|
|
* the FDC went off to the Saints...
|
|
*/
|
|
fdc->retry = 6; /* try a reset */
|
|
return(retrier(fdcu));
|
|
}
|
|
fd->track = FD_NO_TRACK;
|
|
fdc->state = SEEKWAIT;
|
|
return(0); /* will return later */
|
|
case SEEKWAIT:
|
|
/* allow heads to settle */
|
|
timeout(fd_pseudointr, (caddr_t)fdcu, hz / 16);
|
|
fdc->state = SEEKCOMPLETE;
|
|
return(0); /* will return later */
|
|
case SEEKCOMPLETE : /* SEEK DONE, START DMA */
|
|
/* Make sure seek really happened*/
|
|
if(fd->track == FD_NO_TRACK)
|
|
{
|
|
int descyl = bp->b_cylin * fd->ft->steptrac;
|
|
do {
|
|
/*
|
|
* This might be a "ready changed" interrupt,
|
|
* which cannot really happen since the
|
|
* RDY pin is hardwired to + 5 volts. This
|
|
* generally indicates a "bouncing" intr
|
|
* line, so do one of the following:
|
|
*
|
|
* When running on an enhanced FDC that is
|
|
* known to not go stuck after responding
|
|
* with INVALID, fetch all interrupt states
|
|
* until seeing either an INVALID or a
|
|
* real interrupt condition.
|
|
*
|
|
* When running on a dumb old NE765, give
|
|
* up immediately. The controller will
|
|
* provide up to four dummy RC interrupt
|
|
* conditions right after reset (for the
|
|
* corresponding four drives), so this is
|
|
* our only chance to get notice that it
|
|
* was not the FDC that caused the interrupt.
|
|
*/
|
|
if (fd_sense_int(fdc, &st0, &cyl)
|
|
== FD_NOT_VALID)
|
|
return 0;
|
|
if(fdc->fdct == FDC_NE765
|
|
&& (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
|
|
return 0; /* hope for a real intr */
|
|
} while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
|
|
|
|
if (0 == descyl)
|
|
{
|
|
int failed = 0;
|
|
/*
|
|
* seek to cyl 0 requested; make sure we are
|
|
* really there
|
|
*/
|
|
if (fd_sense_drive_status(fdc, &st3))
|
|
failed = 1;
|
|
if ((st3 & NE7_ST3_T0) == 0) {
|
|
printf(
|
|
"fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
|
|
fdu, st3, NE7_ST3BITS);
|
|
failed = 1;
|
|
}
|
|
|
|
if (failed)
|
|
{
|
|
if(fdc->retry < 3)
|
|
fdc->retry = 3;
|
|
return(retrier(fdcu));
|
|
}
|
|
}
|
|
|
|
if (cyl != descyl)
|
|
{
|
|
printf(
|
|
"fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
|
|
fdu, descyl, cyl, st0, NE7_ST0BITS);
|
|
return(retrier(fdcu));
|
|
}
|
|
}
|
|
|
|
fd->track = bp->b_cylin;
|
|
if(format)
|
|
fd->skip = (char *)&(finfo->fd_formb_cylno(0))
|
|
- (char *)finfo;
|
|
isa_dmastart(bp->b_flags, bp->b_un.b_addr+fd->skip,
|
|
format ? bp->b_bcount : fdblk, fdc->dmachan);
|
|
blknum = (unsigned long)bp->b_blkno*DEV_BSIZE/fdblk
|
|
+ fd->skip/fdblk;
|
|
sectrac = fd->ft->sectrac;
|
|
sec = blknum % (sectrac * fd->ft->heads);
|
|
head = sec / sectrac;
|
|
sec = sec % sectrac + 1;
|
|
fd->hddrv = ((head&1)<<2)+fdu;
|
|
|
|
if(format || !read)
|
|
{
|
|
/* make sure the drive is writable */
|
|
if(fd_sense_drive_status(fdc, &st3) != 0)
|
|
{
|
|
/* stuck controller? */
|
|
fdc->retry = 6; /* reset the beast */
|
|
return(retrier(fdcu));
|
|
}
|
|
if(st3 & NE7_ST3_WP)
|
|
{
|
|
/*
|
|
* XXX YES! this is ugly.
|
|
* in order to force the current operation
|
|
* to fail, we will have to fake an FDC
|
|
* error - all error handling is done
|
|
* by the retrier()
|
|
*/
|
|
fdc->status[0] = NE7_ST0_IC_AT;
|
|
fdc->status[1] = NE7_ST1_NW;
|
|
fdc->status[2] = 0;
|
|
fdc->status[3] = fd->track;
|
|
fdc->status[4] = head;
|
|
fdc->status[5] = sec;
|
|
fdc->retry = 8; /* break out immediately */
|
|
fdc->state = IOTIMEDOUT; /* not really... */
|
|
return (1);
|
|
}
|
|
}
|
|
|
|
if(format)
|
|
{
|
|
/* formatting */
|
|
if(fd_cmd(fdcu, 6,
|
|
NE7CMD_FORMAT,
|
|
head << 2 | fdu,
|
|
finfo->fd_formb_secshift,
|
|
finfo->fd_formb_nsecs,
|
|
finfo->fd_formb_gaplen,
|
|
finfo->fd_formb_fillbyte,
|
|
0))
|
|
{
|
|
/* controller fell over */
|
|
fdc->retry = 6;
|
|
return(retrier(fdcu));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (fd_cmd(fdcu, 9,
|
|
(read ? NE7CMD_READ : NE7CMD_WRITE),
|
|
head << 2 | fdu, /* head & unit */
|
|
fd->track, /* track */
|
|
head,
|
|
sec, /* sector + 1 */
|
|
fd->ft->secsize, /* sector size */
|
|
sectrac, /* sectors/track */
|
|
fd->ft->gap, /* gap size */
|
|
fd->ft->datalen, /* data length */
|
|
0))
|
|
{
|
|
/* the beast is sleeping again */
|
|
fdc->retry = 6;
|
|
return(retrier(fdcu));
|
|
}
|
|
}
|
|
fdc->state = IOCOMPLETE;
|
|
timeout(fd_timeout, (caddr_t)fdcu, hz);
|
|
return(0); /* will return later */
|
|
case IOCOMPLETE: /* IO DONE, post-analyze */
|
|
untimeout(fd_timeout, (caddr_t)fdcu);
|
|
|
|
if (fd_read_status(fdc, fd->fdsu))
|
|
{
|
|
if (fdc->retry < 6)
|
|
fdc->retry = 6; /* force a reset */
|
|
return retrier(fdcu);
|
|
}
|
|
|
|
fdc->state = IOTIMEDOUT;
|
|
|
|
/* FALLTHROUGH */
|
|
|
|
case IOTIMEDOUT:
|
|
isa_dmadone(bp->b_flags, bp->b_un.b_addr+fd->skip,
|
|
format ? bp->b_bcount : fdblk, fdc->dmachan);
|
|
if (fdc->status[0] & NE7_ST0_IC)
|
|
{
|
|
if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
|
|
&& fdc->status[1] & NE7_ST1_OR) {
|
|
/*
|
|
* DMA overrun. Someone hogged the bus
|
|
* and didn't release it in time for the
|
|
* next FDC transfer.
|
|
* Just restart it, don't increment retry
|
|
* count. (vak)
|
|
*/
|
|
fdc->state = SEEKCOMPLETE;
|
|
return (1);
|
|
}
|
|
else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
|
|
&& fdc->retry < 6)
|
|
fdc->retry = 6; /* force a reset */
|
|
else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
|
|
&& fdc->status[2] & NE7_ST2_WC
|
|
&& fdc->retry < 3)
|
|
fdc->retry = 3; /* force recalibrate */
|
|
return(retrier(fdcu));
|
|
}
|
|
/* All OK */
|
|
fd->skip += fdblk;
|
|
if (!format && fd->skip < bp->b_bcount)
|
|
{
|
|
/* set up next transfer */
|
|
blknum = (unsigned long)bp->b_blkno*DEV_BSIZE/fdblk
|
|
+ fd->skip/fdblk;
|
|
bp->b_cylin =
|
|
(blknum / (fd->ft->sectrac * fd->ft->heads));
|
|
fdc->state = DOSEEK;
|
|
}
|
|
else
|
|
{
|
|
/* ALL DONE */
|
|
fd->skip = 0;
|
|
bp->b_resid = 0;
|
|
dp->b_actf = bp->b_actf;
|
|
biodone(bp);
|
|
fdc->fd = (fd_p) 0;
|
|
fdc->fdu = -1;
|
|
fdc->state = FINDWORK;
|
|
}
|
|
return(1);
|
|
case RESETCTLR:
|
|
fdc_reset(fdc);
|
|
fdc->retry++;
|
|
fdc->state = STARTRECAL;
|
|
break;
|
|
case STARTRECAL:
|
|
if(fd_cmd(fdcu,
|
|
2, NE7CMD_RECAL, fdu,
|
|
0)) /* Recalibrate Function */
|
|
{
|
|
/* arrgl */
|
|
fdc->retry = 6;
|
|
return(retrier(fdcu));
|
|
}
|
|
fdc->state = RECALWAIT;
|
|
return(0); /* will return later */
|
|
case RECALWAIT:
|
|
/* allow heads to settle */
|
|
timeout(fd_pseudointr, (caddr_t)fdcu, hz / 8);
|
|
fdc->state = RECALCOMPLETE;
|
|
return(0); /* will return later */
|
|
case RECALCOMPLETE:
|
|
do {
|
|
/*
|
|
* See SEEKCOMPLETE for a comment on this:
|
|
*/
|
|
if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
|
|
return 0;
|
|
if(fdc->fdct == FDC_NE765
|
|
&& (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
|
|
return 0; /* hope for a real intr */
|
|
} while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
|
|
if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
|
|
{
|
|
if(fdc->retry > 3)
|
|
/*
|
|
* a recalibrate from beyond cylinder 77
|
|
* will "fail" due to the FDC limitations;
|
|
* since people used to complain much about
|
|
* the failure message, try not logging
|
|
* this one if it seems to be the first
|
|
* time in a line
|
|
*/
|
|
printf("fd%d: recal failed ST0 %b cyl %d\n",
|
|
fdu, st0, NE7_ST0BITS, cyl);
|
|
if(fdc->retry < 3) fdc->retry = 3;
|
|
return(retrier(fdcu));
|
|
}
|
|
fd->track = 0;
|
|
/* Seek (probably) necessary */
|
|
fdc->state = DOSEEK;
|
|
return(1); /* will return immediatly */
|
|
case MOTORWAIT:
|
|
if(fd->flags & FD_MOTOR_WAIT)
|
|
{
|
|
return(0); /* time's not up yet */
|
|
}
|
|
/*
|
|
* since the controller was off, it has lost its
|
|
* idea about the current track it were; thus,
|
|
* recalibrate the bastard
|
|
*/
|
|
fdc->state = STARTRECAL;
|
|
return(1); /* will return immediatly */
|
|
default:
|
|
printf("fdc%d: Unexpected FD int->", fdcu);
|
|
if (fd_read_status(fdc, fd->fdsu) == 0)
|
|
printf("FDC status :%lx %lx %lx %lx %lx %lx %lx ",
|
|
fdc->status[0],
|
|
fdc->status[1],
|
|
fdc->status[2],
|
|
fdc->status[3],
|
|
fdc->status[4],
|
|
fdc->status[5],
|
|
fdc->status[6] );
|
|
else
|
|
printf("No status available ");
|
|
if (fd_sense_int(fdc, &st0, &cyl) != 0)
|
|
{
|
|
printf("[controller is dead now]\n");
|
|
return(0);
|
|
}
|
|
printf("ST0 = %x, PCN = %x\n", st0, cyl);
|
|
return(0);
|
|
}
|
|
/*XXX confusing: some branches return immediately, others end up here*/
|
|
return(1); /* Come back immediatly to new state */
|
|
}
|
|
|
|
static int
|
|
retrier(fdcu)
|
|
fdcu_t fdcu;
|
|
{
|
|
fdc_p fdc = fdc_data + fdcu;
|
|
register struct buf *dp, *bp;
|
|
|
|
dp = &(fdc->head);
|
|
bp = dp->b_actf;
|
|
|
|
if(fd_data[FDUNIT(minor(bp->b_dev))].options & FDOPT_NORETRY)
|
|
goto fail;
|
|
switch(fdc->retry)
|
|
{
|
|
case 0: case 1: case 2:
|
|
fdc->state = SEEKCOMPLETE;
|
|
break;
|
|
case 3: case 4: case 5:
|
|
fdc->state = STARTRECAL;
|
|
break;
|
|
case 6:
|
|
fdc->state = RESETCTLR;
|
|
break;
|
|
case 7:
|
|
break;
|
|
default:
|
|
fail:
|
|
{
|
|
dev_t sav_b_dev = bp->b_dev;
|
|
/* Trick diskerr */
|
|
bp->b_dev = makedev(major(bp->b_dev),
|
|
(FDUNIT(minor(bp->b_dev))<<3)|RAW_PART);
|
|
diskerr(bp, "fd", "hard error", LOG_PRINTF,
|
|
fdc->fd->skip / DEV_BSIZE,
|
|
(struct disklabel *)NULL);
|
|
bp->b_dev = sav_b_dev;
|
|
if (fdc->flags & FDC_STAT_VALID)
|
|
{
|
|
printf(
|
|
" (ST0 %b ST1 %b ST2 %b cyl %ld hd %ld sec %ld)\n",
|
|
fdc->status[0], NE7_ST0BITS,
|
|
fdc->status[1], NE7_ST1BITS,
|
|
fdc->status[2], NE7_ST2BITS,
|
|
fdc->status[3], fdc->status[4],
|
|
fdc->status[5]);
|
|
}
|
|
else
|
|
printf(" (No status)\n");
|
|
}
|
|
bp->b_flags |= B_ERROR;
|
|
bp->b_error = EIO;
|
|
bp->b_resid = bp->b_bcount - fdc->fd->skip;
|
|
dp->b_actf = bp->b_actf;
|
|
fdc->fd->skip = 0;
|
|
biodone(bp);
|
|
fdc->state = FINDWORK;
|
|
fdc->fd = (fd_p) 0;
|
|
fdc->fdu = -1;
|
|
/* XXX abort current command, if any. */
|
|
return(1);
|
|
}
|
|
fdc->retry++;
|
|
return(1);
|
|
}
|
|
|
|
static int
|
|
fdformat(dev, finfo, p)
|
|
dev_t dev;
|
|
struct fd_formb *finfo;
|
|
struct proc *p;
|
|
{
|
|
fdu_t fdu;
|
|
fd_p fd;
|
|
|
|
struct buf *bp;
|
|
int rv = 0, s;
|
|
size_t fdblk;
|
|
|
|
fdu = FDUNIT(minor(dev));
|
|
fd = &fd_data[fdu];
|
|
fdblk = 128 << fd->ft->secsize;
|
|
|
|
/* set up a buffer header for fdstrategy() */
|
|
bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT);
|
|
if(bp == 0)
|
|
return ENOBUFS;
|
|
bzero((void *)bp, sizeof(struct buf));
|
|
bp->b_flags = B_BUSY | B_PHYS | B_FORMAT;
|
|
bp->b_proc = p;
|
|
bp->b_dev = dev;
|
|
|
|
/*
|
|
* calculate a fake blkno, so fdstrategy() would initiate a
|
|
* seek to the requested cylinder
|
|
*/
|
|
bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
|
|
+ finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
|
|
|
|
bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
|
|
bp->b_un.b_addr = (caddr_t)finfo;
|
|
|
|
/* now do the format */
|
|
fdstrategy(bp);
|
|
|
|
/* ...and wait for it to complete */
|
|
s = splbio();
|
|
while(!(bp->b_flags & B_DONE))
|
|
{
|
|
rv = tsleep((caddr_t)bp, PRIBIO, "fdform", 20 * hz);
|
|
if(rv == EWOULDBLOCK)
|
|
break;
|
|
}
|
|
splx(s);
|
|
|
|
if(rv == EWOULDBLOCK)
|
|
/* timed out */
|
|
rv = EIO;
|
|
if(bp->b_flags & B_ERROR)
|
|
rv = bp->b_error;
|
|
biodone(bp);
|
|
free(bp, M_TEMP);
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* TODO: don't allocate buffer on stack.
|
|
*/
|
|
|
|
int
|
|
fdioctl(dev, cmd, addr, flag, p)
|
|
dev_t dev;
|
|
int cmd;
|
|
caddr_t addr;
|
|
int flag;
|
|
struct proc *p;
|
|
{
|
|
fdu_t fdu = FDUNIT(minor(dev));
|
|
fd_p fd = &fd_data[fdu];
|
|
size_t fdblk;
|
|
|
|
struct fd_type *fdt;
|
|
struct disklabel *dl;
|
|
char buffer[DEV_BSIZE];
|
|
int error = 0;
|
|
|
|
#if NFT > 0
|
|
int type = FDTYPE(minor(dev));
|
|
|
|
/* check for a tape ioctl */
|
|
if (type & F_TAPE_TYPE)
|
|
return ftioctl(dev, cmd, addr, flag, p);
|
|
#endif
|
|
|
|
fdblk = 128 << fd->ft->secsize;
|
|
|
|
switch (cmd)
|
|
{
|
|
case DIOCGDINFO:
|
|
bzero(buffer, sizeof (buffer));
|
|
dl = (struct disklabel *)buffer;
|
|
dl->d_secsize = fdblk;
|
|
fdt = fd_data[FDUNIT(minor(dev))].ft;
|
|
dl->d_secpercyl = fdt->size / fdt->tracks;
|
|
dl->d_type = DTYPE_FLOPPY;
|
|
|
|
if (readdisklabel(dev, fdstrategy, dl, NULL, 0) == NULL)
|
|
error = 0;
|
|
else
|
|
error = EINVAL;
|
|
|
|
*(struct disklabel *)addr = *dl;
|
|
break;
|
|
|
|
case DIOCSDINFO:
|
|
if ((flag & FWRITE) == 0)
|
|
error = EBADF;
|
|
break;
|
|
|
|
case DIOCWLABEL:
|
|
if ((flag & FWRITE) == 0)
|
|
error = EBADF;
|
|
break;
|
|
|
|
case DIOCWDINFO:
|
|
if ((flag & FWRITE) == 0)
|
|
{
|
|
error = EBADF;
|
|
break;
|
|
}
|
|
|
|
dl = (struct disklabel *)addr;
|
|
|
|
if ((error =
|
|
setdisklabel ((struct disklabel *)buffer, dl, 0)))
|
|
break;
|
|
|
|
error = writedisklabel(dev, fdstrategy,
|
|
(struct disklabel *)buffer);
|
|
break;
|
|
|
|
case FD_FORM:
|
|
if((flag & FWRITE) == 0)
|
|
error = EBADF; /* must be opened for writing */
|
|
else if(((struct fd_formb *)addr)->format_version !=
|
|
FD_FORMAT_VERSION)
|
|
error = EINVAL; /* wrong version of formatting prog */
|
|
else
|
|
error = fdformat(dev, (struct fd_formb *)addr, p);
|
|
break;
|
|
|
|
case FD_GTYPE: /* get drive type */
|
|
*(struct fd_type *)addr = *fd_data[FDUNIT(minor(dev))].ft;
|
|
break;
|
|
|
|
case FD_STYPE: /* set drive type */
|
|
/* this is considered harmful; only allow for superuser */
|
|
if(suser(p->p_ucred, &p->p_acflag) != 0)
|
|
return EPERM;
|
|
*fd_data[FDUNIT(minor(dev))].ft = *(struct fd_type *)addr;
|
|
break;
|
|
|
|
case FD_GOPTS: /* get drive options */
|
|
*(int *)addr = fd_data[FDUNIT(minor(dev))].options;
|
|
break;
|
|
|
|
case FD_SOPTS: /* set drive options */
|
|
fd_data[FDUNIT(minor(dev))].options = *(int *)addr;
|
|
break;
|
|
|
|
default:
|
|
error = ENOTTY;
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
#endif
|
|
/*
|
|
* Hello emacs, these are the
|
|
* Local Variables:
|
|
* c-indent-level: 8
|
|
* c-continued-statement-offset: 8
|
|
* c-continued-brace-offset: 0
|
|
* c-brace-offset: -8
|
|
* c-brace-imaginary-offset: 0
|
|
* c-argdecl-indent: 8
|
|
* c-label-offset: -8
|
|
* c++-hanging-braces: 1
|
|
* c++-access-specifier-offset: -8
|
|
* c++-empty-arglist-indent: 8
|
|
* c++-friend-offset: 0
|
|
* End:
|
|
*/
|