1173 lines
27 KiB
C
1173 lines
27 KiB
C
/*-
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* Copyright (c) 1993, 1994 Charles Hannum.
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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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* 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 1.48 1994/06/16 01:08:18 mycroft Exp $
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*/
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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 <sys/device.h>
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#include <sys/disklabel.h>
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#include <sys/dkstat.h>
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#include <sys/dkbad.h>
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#include <sys/disk.h>
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#include <sys/buf.h>
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#include <sys/uio.h>
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#include <sys/syslog.h>
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#include <sys/queue.h>
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#include <machine/cpu.h>
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#include <machine/pio.h>
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#ifndef NEWCONFIG
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#include <i386/isa/isa_device.h>
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#endif
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#include <i386/isa/isavar.h>
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#include <i386/isa/dmavar.h>
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#include <i386/isa/icu.h>
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#include <i386/isa/fdreg.h>
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#ifdef NEWCONFIG
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#include <i386/isa/nvram.h>
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#else
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#include <i386/isa/rtc.h>
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#endif
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#define FDUNIT(s) (minor(s)>>3)
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#define FDTYPE(s) (minor(s)&7)
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#define b_cylin b_resid
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enum fdc_state {
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DEVIDLE = 0,
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MOTORWAIT,
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DOSEEK,
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SEEKWAIT,
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SEEKTIMEDOUT,
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SEEKCOMPLETE,
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DOIO,
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IOCOMPLETE,
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IOTIMEDOUT,
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DORESET,
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RESETCOMPLETE,
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RESETTIMEDOUT,
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DORECAL,
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RECALWAIT,
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RECALTIMEDOUT,
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RECALCOMPLETE,
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};
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/* software state, per controller */
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struct fdc_softc {
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struct device sc_dev; /* boilerplate */
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struct isadev sc_id;
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struct intrhand sc_ih;
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u_short sc_iobase;
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u_short sc_drq;
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struct fd_softc *sc_fd[4]; /* pointers to children */
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TAILQ_HEAD(drivehead, fd_softc) sc_drives;
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enum fdc_state sc_state;
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int sc_retry; /* number of retries so far */
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u_char sc_status[7]; /* copy of registers */
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};
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/* controller driver configuration */
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int fdcprobe();
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#ifdef NEWCONFIG
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void fdcforceintr __P((void *));
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#endif
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void fdcattach();
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int fdcintr __P((struct fdc_softc *));
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struct cfdriver fdccd = {
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NULL, "fdc", fdcprobe, fdcattach, DV_DULL, sizeof(struct fdc_softc)
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};
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/*
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* Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how
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* we tell them apart.
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*/
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struct fd_type {
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int sectrac; /* sectors per track */
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int secsize; /* size code for sectors */
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int datalen; /* data len when secsize = 0 */
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int steprate; /* step rate and head unload time */
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int gap1; /* gap len between sectors */
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int gap2; /* formatting gap */
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int tracks; /* total num of tracks */
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int size; /* size of disk in sectors */
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int step; /* steps per cylinder */
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int rate; /* transfer speed code */
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int heads; /* number of heads */
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char *name;
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};
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/* The order of entries in the following table is important -- BEWARE! */
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struct fd_type fd_types[] = {
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{ 18,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,2,"1.44MB" }, /* 1.44MB diskette */
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{ 15,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS,2, "1.2MB" }, /* 1.2 MB AT-diskettes */
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{ 9,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS,2, "360KB/AT" }, /* 360kB in 1.2MB drive */
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{ 9,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS,2, "360KB/PC" }, /* 360kB PC diskettes */
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{ 9,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS,2, "720KB" }, /* 3.5" 720kB diskette */
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{ 9,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS,2, "720KB/x" }, /* 720kB in 1.2MB drive */
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{ 9,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS,2, "360KB/x" }, /* 360kB in 720kB drive */
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};
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/* software state, per disk (with up to 4 disks per ctlr) */
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struct fd_softc {
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struct device sc_dev;
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#ifdef NEWCONFIG
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struct dkdevice sc_dk;
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#endif
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struct fd_type *sc_deftype; /* default type descriptor */
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TAILQ_ENTRY(fd_softc) sc_drivechain;
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struct buf sc_q; /* head of buf chain */
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int sc_drive; /* unit number on this controller */
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int sc_flags;
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#define FD_OPEN 0x01 /* it's open */
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#define FD_MOTOR 0x02 /* motor should be on */
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#define FD_MOTOR_WAIT 0x04 /* motor coming up */
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int sc_skip; /* bytes transferred so far */
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int sc_track; /* where we think the head is */
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int sc_nblks; /* number of blocks tranferring */
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int sc_ops; /* I/O operations completed */
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daddr_t sc_blkno; /* starting block number */
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};
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/* floppy driver configuration */
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int fdprobe();
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void fdattach();
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struct cfdriver fdcd = {
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NULL, "fd", fdprobe, fdattach, DV_DISK, sizeof(struct fd_softc)
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};
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#ifdef NEWCONFIG
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void fdstrategy __P((struct buf *));
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struct dkdriver fddkdriver = { fdstrategy };
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#endif
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struct fd_type *fd_nvtotype __P((char *, int, int));
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void fdstart __P((struct fd_softc *fd));
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void fd_set_motor __P((struct fdc_softc *fdc, int reset));
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void fd_motor_off __P((void *arg));
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void fd_motor_on __P((void *arg));
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int fdcresult __P((struct fdc_softc *fdc));
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int out_fdc __P((u_short iobase, u_char x));
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void fdcstart __P((struct fdc_softc *fdc));
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void fdcstatus __P((struct device *dv, int n, char *s));
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void fdctimeout __P((void *arg));
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void fdcpseudointr __P((void *arg));
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int fdcintr __P((struct fdc_softc *fdc));
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void fdcretry __P((struct fdc_softc *fdc));
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void fdfinish __P((struct fd_softc *fd, struct buf *bp));
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int
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fdcprobe(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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register struct isa_attach_args *ia = aux;
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u_short iobase = ia->ia_iobase;
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/* reset */
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outb(iobase + fdout, 0);
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delay(100);
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outb(iobase + fdout, FDO_FRST);
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/* see if it can handle a command */
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if (out_fdc(iobase, NE7CMD_SPECIFY) < 0)
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return 0;
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out_fdc(iobase, 0xdf);
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out_fdc(iobase, 2);
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#ifdef NEWCONFIG
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if (iobase == IOBASEUNK || ia->ia_drq == DRQUNK)
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return 0;
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if (ia->ia_irq == IRQUNK) {
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ia->ia_irq = isa_discoverintr(fdcforceintr, aux);
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if (ia->ia_irq == IRQNONE)
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return 0;
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/* reset it again */
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outb(iobase + fdout, 0);
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delay(100);
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outb(iobase + fdout, FDO_FRST);
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}
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#endif
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ia->ia_iosize = FDC_NPORT;
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ia->ia_msize = 0;
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return 1;
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}
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#ifdef NEWCONFIG
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void
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fdcforceintr(aux)
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void *aux;
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{
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struct isa_attach_args *ia = aux;
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u_short iobase = ia->ia_iobase;
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/* the motor is off; this should generate an error with or
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without a disk drive present */
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out_fdc(iobase, NE7CMD_SEEK);
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out_fdc(iobase, 0);
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out_fdc(iobase, 0);
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}
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#endif
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/*
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* Arguments passed between fdcattach and fdprobe.
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*/
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struct fdc_attach_args {
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int fa_drive;
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struct fd_type *fa_deftype;
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};
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/*
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* Print the location of a disk drive (called just before attaching the
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* the drive). If `fdc' is not NULL, the drive was found but was not
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* in the system config file; print the drive name as well.
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* Return QUIET (config_find ignores this if the device was configured) to
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* avoid printing `fdN not configured' messages.
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*/
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int
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fdprint(aux, fdc)
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void *aux;
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char *fdc;
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{
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register struct fdc_attach_args *fa = aux;
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if (!fdc)
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printf(" drive %d", fa->fa_drive);
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return QUIET;
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}
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void
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fdcattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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register struct fdc_softc *fdc = (struct fdc_softc *)self;
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struct isa_attach_args *ia = aux;
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int type;
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struct fdc_attach_args fa;
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fdc->sc_iobase = ia->ia_iobase;
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fdc->sc_drq = ia->ia_drq;
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fdc->sc_state = DEVIDLE;
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TAILQ_INIT(&fdc->sc_drives);
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printf("\n");
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#ifdef NEWCONFIG
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at_setup_dmachan(fdc->sc_drq, FDC_MAXIOSIZE);
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isa_establish(&fdc->sc_id, &fdc->sc_dev);
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#endif
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fdc->sc_ih.ih_fun = fdcintr;
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fdc->sc_ih.ih_arg = fdc;
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fdc->sc_ih.ih_level = IPL_BIO;
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intr_establish(ia->ia_irq, &fdc->sc_ih);
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/*
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* The NVRAM info only tells us about the first two disks on the
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* `primary' floppy controller.
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*/
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if (fdc->sc_dev.dv_unit == 0)
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#ifdef NEWCONFIG
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type = nvram(NVRAM_DISKETTE);
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#else
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type = rtcin(RTC_FDISKETTE);
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#endif
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else
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type = -1;
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/* physical limit: four drives per controller. */
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for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) {
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if (type >= 0 && fa.fa_drive < 2) {
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fa.fa_deftype = fd_nvtotype(fdc->sc_dev.dv_xname,
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type, fa.fa_drive);
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} else {
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fa.fa_deftype = NULL; /* unknown */
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}
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(void)config_found(self, (void *)&fa, fdprint);
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}
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}
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int
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fdprobe(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct fdc_softc *fdc = (void *)parent;
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struct cfdata *cf = self->dv_cfdata;
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struct fdc_attach_args *fa = aux;
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u_short iobase = fdc->sc_iobase;
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int n;
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int drive = fa->fa_drive;
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#ifdef NEWCONFIG
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#define cf_drive cf_loc[0]
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if (cf->cf_drive != -1 && cf->cf_drive != drive)
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return 0;
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#undef cf_drive
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#else
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struct isa_device *id = (void *)cf->cf_loc;
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if (id->id_physid != -1 && id->id_physid != drive)
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return 0;
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#endif
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/* select drive and turn on motor */
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outb(iobase + fdout, drive | FDO_FRST | FDO_MOEN(drive));
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/* wait for motor to spin up */
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delay(250000);
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out_fdc(iobase, NE7CMD_RECAL);
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out_fdc(iobase, drive);
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/* wait for recalibrate */
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delay(2000000);
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out_fdc(iobase, NE7CMD_SENSEI);
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n = fdcresult(fdc);
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#ifdef DEBUG
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{
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int i;
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printf("fdprobe: status");
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for (i = 0; i < n; i++)
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printf(" %x", fdc->sc_status[i]);
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printf("\n");
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}
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#endif
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if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20)
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return 0;
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/* turn off motor */
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outb(iobase + fdout, FDO_FRST);
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return 1;
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}
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/*
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* Controller is working, and drive responded. Attach it.
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*/
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void
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fdattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct fdc_softc *fdc = (void *)parent;
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struct fd_softc *fd = (void *)self;
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struct fdc_attach_args *fa = aux;
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struct fd_type *type = fa->fa_deftype;
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int drive = fa->fa_drive;
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/* XXXX should allow `flags' to override device type */
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if (type)
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printf(": %s %d cyl, %d head, %d sec\n", type->name,
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type->tracks, type->heads, type->sectrac);
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else
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printf(": density unknown\n");
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fd->sc_track = -1;
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fd->sc_drive = drive;
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fd->sc_deftype = type;
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fdc->sc_fd[drive] = fd;
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#ifdef NEWCONFIG
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fd->sc_dk.dk_driver = &fddkdriver;
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/* XXX need to do some more fiddling with sc_dk */
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dk_establish(&fd->sc_dk, &fd->sc_dev);
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#endif
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}
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/*
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* Translate nvram type into internal data structure. Return NULL for
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* none/unknown/unusable.
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*/
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struct fd_type *
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fd_nvtotype(fdc, nvraminfo, drive)
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char *fdc;
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int nvraminfo, drive;
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{
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int type;
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type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0;
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switch (type) {
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#ifdef NEWCONFIG
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case NVRAM_DISKETTE_NONE:
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return NULL;
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case NVRAM_DISKETTE_12M:
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return &fd_types[1];
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case NVRAM_DISKETTE_144M:
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return &fd_types[0];
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case NVRAM_DISKETTE_360K:
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return &fd_types[3];
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case NVRAM_DISKETTE_720K:
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return &fd_types[4];
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#else
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case RTCFDT_NONE:
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return NULL;
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case RTCFDT_12M:
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return &fd_types[1];
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case RTCFDT_TYPE5:
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case RTCFDT_TYPE6:
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/* XXX We really ought to handle 2.88MB format. */
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case RTCFDT_144M:
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return &fd_types[0];
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case RTCFDT_360K:
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return &fd_types[3];
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case RTCFDT_720K:
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return &fd_types[4];
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#endif
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default:
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printf("%s: drive %d: unknown device type 0x%x\n",
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fdc, drive, type);
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return NULL;
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}
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}
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|
|
inline struct fd_type *
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fd_dev_to_type(fd, dev)
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struct fd_softc *fd;
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dev_t dev;
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{
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int type = FDTYPE(dev);
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return type ? &fd_types[type - 1] : fd->sc_deftype;
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}
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void
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fdstrategy(bp)
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register struct buf *bp; /* IO operation to perform */
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|
{
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|
int fdu = FDUNIT(bp->b_dev);
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|
struct fd_softc *fd = fdcd.cd_devs[fdu];
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|
struct fdc_softc *fdc = (struct fdc_softc *)fd->sc_dev.dv_parent;
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struct fd_type *type = fd_dev_to_type(fd, bp->b_dev);
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|
struct buf *dp;
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|
int nblks;
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daddr_t blkno;
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int s;
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|
|
|
#ifdef DIAGNOSTIC
|
|
if (bp->b_blkno < 0 || fdu < 0 || fdu >= fdcd.cd_ndevs) {
|
|
printf("fdstrategy: fdu=%d, blkno=%d, bcount=%d\n", fdu,
|
|
bp->b_blkno, bp->b_bcount);
|
|
bp->b_flags |= B_ERROR;
|
|
goto bad;
|
|
}
|
|
#endif
|
|
|
|
blkno = bp->b_blkno * DEV_BSIZE / FDC_BSIZE;
|
|
nblks = type->size;
|
|
if (blkno + (bp->b_bcount / FDC_BSIZE) > nblks) {
|
|
if (blkno == nblks) {
|
|
/* if we try to read past end of disk, return count of 0 */
|
|
bp->b_resid = bp->b_bcount;
|
|
} else {
|
|
bp->b_error = ENOSPC;
|
|
bp->b_flags |= B_ERROR;
|
|
}
|
|
goto bad;
|
|
}
|
|
bp->b_cylin = (blkno / (type->sectrac * type->heads)) * type->step;
|
|
#ifdef notyet
|
|
bp->b_type = type;
|
|
#endif
|
|
#ifdef DEBUG
|
|
printf("fdstrategy: b_blkno %d b_bcount %d blkno %d cylin %d nblks %d\n",
|
|
bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin, nblks);
|
|
#endif
|
|
s = splbio();
|
|
disksort(&fd->sc_q, bp);
|
|
untimeout(fd_motor_off, fd); /* a good idea */
|
|
if (!fd->sc_q.b_active)
|
|
fdstart(fd);
|
|
#ifdef DIAGNOSTIC
|
|
else if (fdc->sc_state == DEVIDLE) {
|
|
printf("fdstrategy: controller inactive\n");
|
|
fdcstart(fdc);
|
|
}
|
|
#endif
|
|
splx(s);
|
|
return;
|
|
|
|
bad:
|
|
biodone(bp);
|
|
}
|
|
|
|
void
|
|
fdstart(fd)
|
|
struct fd_softc *fd;
|
|
{
|
|
struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
|
|
int active = fdc->sc_drives.tqh_first != 0;
|
|
|
|
/* Link into controller queue. */
|
|
fd->sc_q.b_active = 1;
|
|
TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain);
|
|
|
|
/* If controller not already active, start it. */
|
|
if (!active)
|
|
fdcstart(fdc);
|
|
}
|
|
|
|
void
|
|
fd_set_motor(fdc, reset)
|
|
struct fdc_softc *fdc;
|
|
int reset;
|
|
{
|
|
struct fd_softc *fd;
|
|
u_char status;
|
|
int n;
|
|
|
|
if (fd = fdc->sc_drives.tqh_first)
|
|
status = fd->sc_drive;
|
|
else
|
|
status = 0;
|
|
if (!reset)
|
|
status |= FDO_FRST | FDO_FDMAEN;
|
|
for (n = 0; n < 4; n++)
|
|
if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR))
|
|
status |= FDO_MOEN(n);
|
|
outb(fdc->sc_iobase + fdout, status);
|
|
}
|
|
|
|
void
|
|
fd_motor_off(arg)
|
|
void *arg;
|
|
{
|
|
int s;
|
|
struct fd_softc *fd;
|
|
|
|
fd = (struct fd_softc *)arg;
|
|
|
|
s = splbio();
|
|
fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT);
|
|
fd_set_motor((struct fdc_softc *)fd->sc_dev.dv_parent, 0);
|
|
splx(s);
|
|
}
|
|
|
|
void
|
|
fd_motor_on(arg)
|
|
void *arg;
|
|
{
|
|
struct fd_softc *fd;
|
|
struct fdc_softc *fdc;
|
|
int s;
|
|
|
|
fd = (struct fd_softc *)arg;
|
|
fdc = (struct fdc_softc *)fd->sc_dev.dv_parent;
|
|
|
|
s = splbio();
|
|
fd->sc_flags &= ~FD_MOTOR_WAIT;
|
|
if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT))
|
|
(void) fdcintr(fdc);
|
|
splx(s);
|
|
}
|
|
|
|
int
|
|
fdcresult(fdc)
|
|
struct fdc_softc *fdc;
|
|
{
|
|
u_short iobase = fdc->sc_iobase;
|
|
u_char i;
|
|
int j = 100000,
|
|
n = 0;
|
|
|
|
for (; j; j--) {
|
|
i = inb(iobase + fdsts) & (NE7_DIO | NE7_RQM | NE7_CB);
|
|
if (i == NE7_RQM)
|
|
return n;
|
|
if (i == (NE7_DIO | NE7_RQM | NE7_CB)) {
|
|
if (n >= sizeof(fdc->sc_status)) {
|
|
log(LOG_ERR, "fdcresult: overrun\n");
|
|
return -1;
|
|
}
|
|
fdc->sc_status[n++] = inb(iobase + fddata);
|
|
}
|
|
}
|
|
log(LOG_ERR, "fdcresult: timeout\n");
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
out_fdc(iobase, x)
|
|
u_short iobase;
|
|
u_char x;
|
|
{
|
|
int i = 100000;
|
|
|
|
while ((inb(iobase + fdsts) & NE7_DIO) && i-- > 0);
|
|
if (i <= 0)
|
|
return -1;
|
|
while ((inb(iobase + fdsts) & NE7_RQM) == 0 && i-- > 0);
|
|
if (i <= 0)
|
|
return -1;
|
|
outb(iobase + fddata, x);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
Fdopen(dev, flags)
|
|
dev_t dev;
|
|
int flags;
|
|
{
|
|
int fdu = FDUNIT(dev);
|
|
int type = FDTYPE(dev);
|
|
struct fd_softc *fd;
|
|
|
|
if (fdu >= fdcd.cd_ndevs)
|
|
return ENXIO;
|
|
fd = fdcd.cd_devs[fdu];
|
|
if (!fd)
|
|
return ENXIO;
|
|
|
|
if (type > (sizeof(fd_types) / sizeof(fd_types[0])))
|
|
return EINVAL;
|
|
|
|
fd->sc_track = -1;
|
|
/* XXX disallow multiple opens? */
|
|
fd->sc_flags |= FD_OPEN;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
fdclose(dev, flags)
|
|
dev_t dev;
|
|
int flags;
|
|
{
|
|
int fdu = FDUNIT(dev);
|
|
struct fd_softc *fd = fdcd.cd_devs[fdu];
|
|
|
|
fd->sc_flags &= ~FD_OPEN;
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
fdcstart(fdc)
|
|
struct fdc_softc *fdc;
|
|
{
|
|
|
|
#ifdef DIAGNOSTIC
|
|
/* only got here if controller's drive queue was inactive; should
|
|
be in idle state */
|
|
if (fdc->sc_state != DEVIDLE) {
|
|
printf("fdcstart: not idle\n");
|
|
return;
|
|
}
|
|
#endif
|
|
(void) fdcintr(fdc);
|
|
}
|
|
|
|
void
|
|
fdcstatus(dv, n, s)
|
|
struct device *dv;
|
|
int n;
|
|
char *s;
|
|
{
|
|
struct fdc_softc *fdc = (void *)dv->dv_parent;
|
|
u_short iobase = fdc->sc_iobase;
|
|
|
|
if (n == 0) {
|
|
out_fdc(fdc->sc_iobase, NE7CMD_SENSEI);
|
|
(void) fdcresult(fdc);
|
|
n = 2;
|
|
}
|
|
|
|
printf("%s: %s st0 %b ", dv->dv_xname, s, fdc->sc_status[0],
|
|
NE7_ST0BITS);
|
|
if (n == 2)
|
|
printf("cyl %d\n", fdc->sc_status[1]);
|
|
else if (n == 7)
|
|
printf("st1 %b st2 %b cyl %d head %d sec %d\n",
|
|
fdc->sc_status[1], NE7_ST1BITS, fdc->sc_status[2],
|
|
NE7_ST2BITS, fdc->sc_status[3], fdc->sc_status[4],
|
|
fdc->sc_status[5]);
|
|
#ifdef DIAGNOSTIC
|
|
else
|
|
printf("\nfdcstatus: weird size");
|
|
#endif
|
|
}
|
|
|
|
void
|
|
fdctimeout(arg)
|
|
void *arg;
|
|
{
|
|
struct fdc_softc *fdc;
|
|
struct fd_softc *fd;
|
|
int s;
|
|
|
|
fdc = (struct fdc_softc *)arg;
|
|
fd = fdc->sc_drives.tqh_first;
|
|
|
|
s = splbio();
|
|
fdcstatus(&fd->sc_dev, 0, "timeout");
|
|
|
|
if (fd->sc_q.b_actf)
|
|
fdc->sc_state++;
|
|
else
|
|
fdc->sc_state = DEVIDLE;
|
|
|
|
(void) fdcintr(fdc);
|
|
splx(s);
|
|
}
|
|
|
|
void
|
|
fdcpseudointr(arg)
|
|
void *arg;
|
|
{
|
|
struct fdc_softc *fdc;
|
|
int s;
|
|
|
|
fdc = (struct fdc_softc *)arg;
|
|
|
|
/* just ensure it has the right spl */
|
|
s = splbio();
|
|
(void) fdcintr(fdc);
|
|
splx(s);
|
|
}
|
|
|
|
int
|
|
fdcintr(fdc)
|
|
struct fdc_softc *fdc;
|
|
{
|
|
#define st0 fdc->sc_status[0]
|
|
#define cyl fdc->sc_status[1]
|
|
struct fd_softc *fd;
|
|
struct buf *bp;
|
|
u_short iobase = fdc->sc_iobase;
|
|
int read, head, trac, sec, i, s, sectrac, blkno, nblks;
|
|
struct fd_type *type;
|
|
|
|
again:
|
|
fd = fdc->sc_drives.tqh_first;
|
|
if (!fd) {
|
|
/* no drives waiting; end */
|
|
fdc->sc_state = DEVIDLE;
|
|
return 1;
|
|
}
|
|
bp = fd->sc_q.b_actf;
|
|
if (!bp) {
|
|
/* nothing queued on this drive; try next */
|
|
fd->sc_ops = 0;
|
|
TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain);
|
|
fd->sc_q.b_active = 0;
|
|
goto again;
|
|
}
|
|
|
|
switch (fdc->sc_state) {
|
|
case DEVIDLE:
|
|
fdc->sc_retry = 0;
|
|
fd->sc_skip = 0;
|
|
fd->sc_blkno = bp->b_blkno * DEV_BSIZE / FDC_BSIZE;
|
|
untimeout(fd_motor_off, fd);
|
|
if (fd->sc_flags & FD_MOTOR_WAIT) {
|
|
fdc->sc_state = MOTORWAIT;
|
|
return 1;
|
|
}
|
|
if (!(fd->sc_flags & FD_MOTOR)) {
|
|
/* lame controller */
|
|
struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1];
|
|
if (ofd && ofd->sc_flags & FD_MOTOR) {
|
|
untimeout(fd_motor_off, ofd);
|
|
ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT);
|
|
}
|
|
fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT;
|
|
fd_set_motor(fdc, 0);
|
|
fdc->sc_state = MOTORWAIT;
|
|
/* allow .25s for motor to stabilize */
|
|
timeout(fd_motor_on, fd, hz / 4);
|
|
return 1;
|
|
}
|
|
/* at least make sure we are selected */
|
|
fd_set_motor(fdc, 0);
|
|
|
|
/* fall through */
|
|
case DOSEEK:
|
|
doseek:
|
|
if (fd->sc_track == bp->b_cylin)
|
|
goto doio;
|
|
|
|
#ifdef notyet
|
|
type = bp->b_type;
|
|
#else
|
|
type = fd_dev_to_type(fd, bp->b_dev);
|
|
#endif
|
|
out_fdc(iobase, NE7CMD_SPECIFY);/* specify command */
|
|
out_fdc(iobase, type->steprate);
|
|
out_fdc(iobase, 6); /* XXX head load time == 6ms */
|
|
|
|
out_fdc(iobase, NE7CMD_SEEK); /* seek function */
|
|
out_fdc(iobase, fd->sc_drive); /* drive number */
|
|
out_fdc(iobase, bp->b_cylin);
|
|
fd->sc_track = -1;
|
|
fdc->sc_state = SEEKWAIT;
|
|
timeout(fdctimeout, fdc, 4 * hz);
|
|
return 1;
|
|
|
|
case DOIO:
|
|
doio:
|
|
#ifdef notyet
|
|
type = bp->b_type;
|
|
#else
|
|
type = fd_dev_to_type(fd, bp->b_dev);
|
|
#endif
|
|
sectrac = type->sectrac;
|
|
sec = fd->sc_blkno % (sectrac * type->heads);
|
|
nblks = (sectrac * type->heads) - sec;
|
|
nblks = min(nblks, (bp->b_bcount - fd->sc_skip) / FDC_BSIZE);
|
|
nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE);
|
|
fd->sc_nblks = nblks;
|
|
head = sec / sectrac;
|
|
sec %= sectrac;
|
|
#ifdef DIAGNOSTIC
|
|
{int block;
|
|
block = (fd->sc_track * type->heads / type->step + head) * sectrac + sec;
|
|
if (block != fd->sc_blkno) {
|
|
printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno);
|
|
#ifdef DDB
|
|
Debugger();
|
|
#endif
|
|
}}
|
|
#endif
|
|
read = bp->b_flags & B_READ;
|
|
#ifdef NEWCONFIG
|
|
at_dma(read, bp->b_data + fd->sc_skip, nblks * FDC_BSIZE,
|
|
fdc->sc_drq);
|
|
#else
|
|
isa_dmastart(read, bp->b_data + fd->sc_skip, nblks * FDC_BSIZE,
|
|
fdc->sc_drq);
|
|
#endif
|
|
outb(iobase + fdctl, type->rate);
|
|
#ifdef DEBUG
|
|
printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n",
|
|
read ? "read" : "write", fd->sc_drive, fd->sc_track, head,
|
|
sec, nblks);
|
|
#endif
|
|
if (read)
|
|
out_fdc(iobase, NE7CMD_READ); /* READ */
|
|
else
|
|
out_fdc(iobase, NE7CMD_WRITE); /* WRITE */
|
|
out_fdc(iobase, (head << 2) | fd->sc_drive);
|
|
out_fdc(iobase, fd->sc_track); /* track */
|
|
out_fdc(iobase, head);
|
|
out_fdc(iobase, sec + 1); /* sector +1 */
|
|
out_fdc(iobase, type->secsize); /* sector size */
|
|
out_fdc(iobase, sectrac); /* sectors/track */
|
|
out_fdc(iobase, type->gap1); /* gap1 size */
|
|
out_fdc(iobase, type->datalen); /* data length */
|
|
fdc->sc_state = IOCOMPLETE;
|
|
/* allow 2 seconds for operation */
|
|
timeout(fdctimeout, fdc, 2 * hz);
|
|
return 1; /* will return later */
|
|
|
|
case SEEKWAIT:
|
|
untimeout(fdctimeout, fdc);
|
|
fdc->sc_state = SEEKCOMPLETE;
|
|
/* allow 1/50 second for heads to settle */
|
|
timeout(fdcpseudointr, fdc, hz / 50);
|
|
return 1;
|
|
|
|
case SEEKCOMPLETE:
|
|
/* make sure seek really happened */
|
|
out_fdc(iobase, NE7CMD_SENSEI);
|
|
if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || cyl != bp->b_cylin) {
|
|
fdcstatus(&fd->sc_dev, 2, "seek failed");
|
|
fdcretry(fdc);
|
|
goto again;
|
|
}
|
|
fd->sc_track = bp->b_cylin;
|
|
goto doio;
|
|
|
|
case IOTIMEDOUT:
|
|
#ifdef NEWCONFIG
|
|
at_dma_abort(fdc->sc_drq);
|
|
#else
|
|
isa_dmaabort(fdc->sc_drq);
|
|
#endif
|
|
case SEEKTIMEDOUT:
|
|
case RECALTIMEDOUT:
|
|
case RESETTIMEDOUT:
|
|
fdcretry(fdc);
|
|
goto again;
|
|
|
|
case IOCOMPLETE: /* IO DONE, post-analyze */
|
|
untimeout(fdctimeout, fdc);
|
|
if (fdcresult(fdc) != 7 || (st0 & 0xf8) != 0) {
|
|
#ifdef NEWCONFIG
|
|
at_dma_abort(fdc->sc_drq);
|
|
#else
|
|
isa_dmaabort(fdc->sc_drq);
|
|
#endif
|
|
fdcstatus(&fd->sc_dev, 7, bp->b_flags & B_READ ?
|
|
"read failed" : "write failed");
|
|
printf("blkno %d skip %d cylin %d status %x\n", bp->b_blkno,
|
|
fd->sc_skip, bp->b_cylin, fdc->sc_status[0]);
|
|
fdcretry(fdc);
|
|
goto again;
|
|
}
|
|
nblks = fd->sc_nblks;
|
|
#ifdef NEWCONFIG
|
|
at_dma_terminate(fdc->sc_drq);
|
|
#else
|
|
isa_dmadone(bp->b_flags & B_READ, bp->b_data + fd->sc_skip,
|
|
nblks * FDC_BSIZE, fdc->sc_drq);
|
|
#endif
|
|
fd->sc_skip += nblks * FDC_BSIZE;
|
|
if (fd->sc_skip < bp->b_bcount) {
|
|
/* set up next transfer */
|
|
blkno = fd->sc_blkno += nblks;
|
|
#ifdef notyet
|
|
type = bp->b_type;
|
|
#else
|
|
type = fd_dev_to_type(fd, bp->b_dev);
|
|
#endif
|
|
bp->b_cylin = (blkno / (type->sectrac * type->heads)) * type->step;
|
|
goto doseek;
|
|
} else {
|
|
fdfinish(fd, bp);
|
|
goto again;
|
|
}
|
|
|
|
case DORESET:
|
|
/* try a reset, keep motor on */
|
|
fd_set_motor(fdc, 1);
|
|
delay(100);
|
|
fd_set_motor(fdc, 0);
|
|
fdc->sc_state = RESETCOMPLETE;
|
|
timeout(fdctimeout, fdc, hz / 2);
|
|
return 1; /* will return later */
|
|
|
|
case RESETCOMPLETE:
|
|
untimeout(fdctimeout, fdc);
|
|
/* clear the controller output buffer */
|
|
for (i = 0; i < 4; i++) {
|
|
out_fdc(iobase, NE7CMD_SENSEI);
|
|
(void) fdcresult(fdc);
|
|
}
|
|
|
|
/* fall through */
|
|
case DORECAL:
|
|
out_fdc(iobase, NE7CMD_RECAL); /* recalibrate function */
|
|
out_fdc(iobase, fd->sc_drive);
|
|
fdc->sc_state = RECALWAIT;
|
|
timeout(fdctimeout, fdc, 5 * hz);
|
|
return 1; /* will return later */
|
|
|
|
case RECALWAIT:
|
|
untimeout(fdctimeout, fdc);
|
|
fdc->sc_state = RECALCOMPLETE;
|
|
/* allow 1/30 second for heads to settle */
|
|
timeout(fdcpseudointr, fdc, hz / 30);
|
|
return 1; /* will return later */
|
|
|
|
case RECALCOMPLETE:
|
|
out_fdc(iobase, NE7CMD_SENSEI);
|
|
if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) {
|
|
fdcstatus(&fd->sc_dev, 2, "recalibrate failed");
|
|
fdcretry(fdc);
|
|
goto again;
|
|
}
|
|
fd->sc_track = 0;
|
|
goto doseek;
|
|
|
|
case MOTORWAIT:
|
|
if (fd->sc_flags & FD_MOTOR_WAIT)
|
|
return 1; /* time's not up yet */
|
|
goto doseek;
|
|
|
|
default:
|
|
fdcstatus(&fd->sc_dev, 0, "stray interrupt");
|
|
return 1;
|
|
}
|
|
#ifdef DIAGNOSTIC
|
|
panic("fdcintr: impossible");
|
|
#endif
|
|
#undef st0
|
|
#undef cyl
|
|
}
|
|
|
|
void
|
|
fdcretry(fdc)
|
|
struct fdc_softc *fdc;
|
|
{
|
|
struct fd_softc *fd;
|
|
struct buf *bp;
|
|
|
|
fd = fdc->sc_drives.tqh_first;
|
|
bp = fd->sc_q.b_actf;
|
|
|
|
switch (fdc->sc_retry) {
|
|
case 0:
|
|
/* try again */
|
|
fdc->sc_state = SEEKCOMPLETE;
|
|
break;
|
|
|
|
case 1: case 2: case 3:
|
|
/* didn't work; try recalibrating */
|
|
fdc->sc_state = DORECAL;
|
|
break;
|
|
|
|
case 4:
|
|
/* still no go; reset the bastard */
|
|
fdc->sc_state = DORESET;
|
|
break;
|
|
|
|
default:
|
|
diskerr(bp, "fd", "hard error", LOG_PRINTF,
|
|
fd->sc_skip, (struct disklabel *)NULL);
|
|
printf(" (st0 %b ", fdc->sc_status[0], NE7_ST0BITS);
|
|
printf("st1 %b ", fdc->sc_status[1], NE7_ST1BITS);
|
|
printf("st2 %b ", fdc->sc_status[2], NE7_ST2BITS);
|
|
printf("cyl %d hd %d sec %d)\n", fdc->sc_status[3],
|
|
fdc->sc_status[4], fdc->sc_status[5]);
|
|
|
|
bp->b_flags |= B_ERROR;
|
|
bp->b_error = EIO;
|
|
fdfinish(fd, bp);
|
|
}
|
|
fdc->sc_retry++;
|
|
}
|
|
|
|
void
|
|
fdfinish(fd, bp)
|
|
struct fd_softc *fd;
|
|
struct buf *bp;
|
|
{
|
|
struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
|
|
|
|
/*
|
|
* Move this drive to the end of the queue to give others a `fair'
|
|
* chance. We only force a switch if N operations are completed while
|
|
* another drive is waiting to be serviced, since there is a long motor
|
|
* startup delay whenever we switch.
|
|
*/
|
|
if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) {
|
|
fd->sc_ops = 0;
|
|
TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain);
|
|
if (bp->b_actf) {
|
|
TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain);
|
|
} else
|
|
fd->sc_q.b_active = 0;
|
|
}
|
|
bp->b_resid = bp->b_bcount - fd->sc_skip;
|
|
fd->sc_skip = 0;
|
|
fd->sc_q.b_actf = bp->b_actf;
|
|
biodone(bp);
|
|
/* turn off motor 5s from now */
|
|
timeout(fd_motor_off, fd, 5 * hz);
|
|
fdc->sc_state = DEVIDLE;
|
|
}
|
|
|
|
int
|
|
fdsize(dev)
|
|
dev_t dev;
|
|
{
|
|
|
|
/* Swapping to floppies would not make sense. */
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fddump()
|
|
{
|
|
|
|
/* Not implemented. */
|
|
return EINVAL;
|
|
}
|
|
|
|
int
|
|
fdioctl(dev, cmd, addr, flag)
|
|
dev_t dev;
|
|
int cmd;
|
|
caddr_t addr;
|
|
int flag;
|
|
{
|
|
struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)];
|
|
struct fd_type *type;
|
|
struct disklabel buffer;
|
|
int error;
|
|
|
|
switch (cmd) {
|
|
case DIOCGDINFO:
|
|
bzero(&buffer, sizeof(buffer));
|
|
|
|
type = fd_dev_to_type(fd, dev);
|
|
buffer.d_secpercyl = type->size / type->tracks;
|
|
buffer.d_type = DTYPE_FLOPPY;
|
|
buffer.d_secsize = FDC_BSIZE;
|
|
|
|
if (readdisklabel(dev, fdstrategy, &buffer, NULL) != NULL)
|
|
return EINVAL;
|
|
|
|
*(struct disklabel *)addr = buffer;
|
|
return 0;
|
|
|
|
case DIOCWLABEL:
|
|
if ((flag & FWRITE) == 0)
|
|
return EBADF;
|
|
/* XXX do something */
|
|
return 0;
|
|
|
|
case DIOCSDINFO:
|
|
case DIOCWDINFO:
|
|
if ((flag & FWRITE) == 0)
|
|
return EBADF;
|
|
|
|
error = setdisklabel(&buffer, (struct disklabel *)addr, 0, NULL);
|
|
if (error)
|
|
return error;
|
|
|
|
error = writedisklabel(dev, fdstrategy, &buffer, NULL);
|
|
return error;
|
|
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
#ifdef DIAGNOSTIC
|
|
panic("fdioctl: impossible");
|
|
#endif
|
|
}
|