1700 lines
39 KiB
C
1700 lines
39 KiB
C
/* $NetBSD: fd.c,v 1.24 1996/03/14 19:45:01 christos Exp $ */
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/*-
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* Copyright (c) 1993, 1994, 1995 Charles Hannum.
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* Copyright (c) 1995 Paul Kranenburg.
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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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* @(#)fd.c 7.4 (Berkeley) 5/25/91
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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/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/disk.h>
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#include <sys/buf.h>
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#include <sys/uio.h>
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#include <sys/stat.h>
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#include <sys/syslog.h>
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#include <sys/queue.h>
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#include <sys/cpu.h>
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#include <dev/cons.h>
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#include <machine/cpu.h>
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#include <machine/autoconf.h>
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#include <sparc/sparc/auxreg.h>
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#include <sparc/dev/fdreg.h>
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#include <sparc/dev/fdvar.h>
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#include <sparc/dev/dev_conf.h>
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#define FDUNIT(dev) (minor(dev) / 8)
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#define FDTYPE(dev) (minor(dev) % 8)
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#define b_cylin b_resid
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#define FD_DEBUG
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#ifdef FD_DEBUG
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int fdc_debug = 0;
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#endif
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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 intrhand sc_sih;
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struct intrhand sc_hih;
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caddr_t sc_reg;
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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_flags;
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#define FDC_82077 0x01
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#define FDC_NEEDHEADSETTLE 0x02
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#define FDC_EIS 0x04
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int sc_errors; /* number of retries so far */
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int sc_overruns; /* number of DMA overruns */
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int sc_cfg; /* current configuration */
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struct fdcio sc_io;
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#define sc_reg_msr sc_io.fdcio_reg_msr
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#define sc_reg_fifo sc_io.fdcio_reg_fifo
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#define sc_reg_dor sc_io.fdcio_reg_dor
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#define sc_reg_drs sc_io.fdcio_reg_msr
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#define sc_istate sc_io.fdcio_istate
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#define sc_data sc_io.fdcio_data
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#define sc_tc sc_io.fdcio_tc
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#define sc_nstat sc_io.fdcio_nstat
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#define sc_status sc_io.fdcio_status
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#define sc_intrcnt sc_io.fdcio_intrcnt
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};
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#ifndef FDC_C_HANDLER
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extern struct fdcio *fdciop;
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#endif
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/* controller driver configuration */
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int fdcmatch __P((struct device *, void *, void *));
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void fdcattach __P((struct device *, struct device *, void *));
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struct cfdriver fdccd = {
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NULL, "fdc", fdcmatch, fdcattach, DV_DULL, sizeof(struct fdc_softc)
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};
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__inline struct fd_type *fd_dev_to_type __P((struct fd_softc *, dev_t));
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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 heads; /* number of heads */
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int seccyl; /* sectors per cylinder */
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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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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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{ 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,"1.44MB" }, /* 1.44MB diskette */
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{ 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS,"1.2MB" }, /* 1.2 MB AT-diskettes */
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{ 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS,"360KB/AT" }, /* 360kB in 1.2MB drive */
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{ 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS,"360KB/PC" }, /* 360kB PC diskettes */
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{ 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS,"720KB" }, /* 3.5" 720kB diskette */
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{ 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS,"720KB/x" }, /* 720kB in 1.2MB drive */
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{ 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS,"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_dv; /* generic device info */
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struct disk sc_dk; /* generic disk info */
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struct fd_type *sc_deftype; /* default type descriptor */
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struct fd_type *sc_type; /* current type descriptor */
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daddr_t sc_blkno; /* starting block number */
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int sc_bcount; /* byte count left */
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int sc_skip; /* bytes already transferred */
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int sc_nblks; /* number of blocks currently tranferring */
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int sc_nbytes; /* number of bytes currently tranferring */
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int sc_drive; /* physical unit number */
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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_cylin; /* where we think the head is */
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void *sc_sdhook; /* shutdownhook cookie */
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TAILQ_ENTRY(fd_softc) sc_drivechain;
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int sc_ops; /* I/O ops since last switch */
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struct buf sc_q; /* head of buf chain */
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};
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/* floppy driver configuration */
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int fdmatch __P((struct device *, void *, void *));
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void fdattach __P((struct device *, struct device *, void *));
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struct cfdriver fdcd = {
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NULL, "fd", fdmatch, fdattach, DV_DISK, sizeof(struct fd_softc)
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};
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void fdgetdisklabel __P((dev_t));
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int fd_get_parms __P((struct fd_softc *));
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void fdstrategy __P((struct buf *));
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void fdstart __P((struct fd_softc *));
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int fdprint __P((void *, char *));
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struct dkdriver fddkdriver = { fdstrategy };
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struct fd_type *fd_nvtotype __P((char *, int, int));
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void fd_set_motor __P((struct fdc_softc *fdc));
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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((struct fdc_softc *fdc, 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 fdc_reset __P((struct fdc_softc *fdc));
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void fdctimeout __P((void *arg));
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void fdcpseudointr __P((void *arg));
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#ifdef FDC_C_HANDLER
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int fdchwintr __P((struct fdc_softc *));
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#else
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void fdchwintr __P((void));
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#endif
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int fdcswintr __P((struct fdc_softc *));
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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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void fd_do_eject __P((void));
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void fd_mountroot_hook __P((struct device *));
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static void fdconf __P((struct fdc_softc *));
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#if PIL_FDSOFT == 4
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#define IE_FDSOFT IE_L4
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#else
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#error 4
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#endif
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#define OBP_FDNAME (CPU_ISSUN4M ? "SUNW,fdtwo" : "fd")
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static const char fmt1[] = " (st0 %b cyl %d)\n";
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static const char fmt2[] = " (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n";
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int
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fdcmatch(parent, match, aux)
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struct device *parent;
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void *match, *aux;
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{
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register struct confargs *ca = aux;
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register struct romaux *ra = &ca->ca_ra;
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/*
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* Floppy doesn't exist on sun4.
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*/
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if (CPU_ISSUN4)
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return (0);
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/*
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* Floppy controller is on mainbus on sun4c.
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*/
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if ((CPU_ISSUN4C) && (ca->ca_bustype != BUS_MAIN))
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return (0);
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/*
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* Floppy controller is on obio on sun4m.
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*/
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if ((CPU_ISSUN4M) && (ca->ca_bustype != BUS_OBIO))
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return (0);
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/* Sun PROMs call the controller an "fd" or "SUNW,fdtwo" */
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if (strcmp(OBP_FDNAME, ra->ra_name))
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return (0);
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if (ca->ca_ra.ra_vaddr &&
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probeget(ca->ca_ra.ra_vaddr, 1) == -1) {
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return (0);
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}
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return (1);
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}
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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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int fa_bootdev;
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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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static void
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fdconf(fdc)
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struct fdc_softc *fdc;
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{
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int vroom;
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if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10)
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return;
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/*
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* dumpreg[7] seems to be a motor-off timeout; set it to whatever
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* the PROM thinks is appropriate.
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*/
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if ((vroom = fdc->sc_status[7]) == 0)
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vroom = 0x64;
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/* Configure controller to use FIFO and Implied Seek */
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out_fdc(fdc, NE7CMD_CFG);
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out_fdc(fdc, vroom);
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out_fdc(fdc, fdc->sc_cfg);
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out_fdc(fdc, 0); /* PRETRK */
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/* No result phase */
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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 confargs *ca = aux;
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struct fdc_softc *fdc = (void *)self;
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struct fdc_attach_args fa;
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struct bootpath *bp;
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int pri;
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char code;
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if (ca->ca_ra.ra_vaddr)
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fdc->sc_reg = (caddr_t)ca->ca_ra.ra_vaddr;
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else
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fdc->sc_reg = (caddr_t)mapiodev(ca->ca_ra.ra_reg, 0,
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ca->ca_ra.ra_len,
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ca->ca_bustype);
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fdc->sc_state = DEVIDLE;
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fdc->sc_istate = ISTATE_IDLE;
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fdc->sc_flags |= FDC_EIS;
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TAILQ_INIT(&fdc->sc_drives);
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pri = ca->ca_ra.ra_intr[0].int_pri;
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#ifdef FDC_C_HANDLER
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fdc->sc_hih.ih_fun = (void *)fdchwintr;
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fdc->sc_hih.ih_arg = fdc;
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intr_establish(pri, &fdc->sc_hih);
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#else
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fdciop = &fdc->sc_io;
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intr_fasttrap(pri, fdchwintr);
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#endif
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fdc->sc_sih.ih_fun = (void *)fdcswintr;
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fdc->sc_sih.ih_arg = fdc;
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intr_establish(PIL_FDSOFT, &fdc->sc_sih);
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/* Assume a 82077 */
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fdc->sc_reg_msr = &((struct fdreg_77 *)fdc->sc_reg)->fd_msr;
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fdc->sc_reg_fifo = &((struct fdreg_77 *)fdc->sc_reg)->fd_fifo;
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fdc->sc_reg_dor = &((struct fdreg_77 *)fdc->sc_reg)->fd_dor;
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code = '7';
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if (*fdc->sc_reg_dor == NE7_RQM) {
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/*
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* This hack from Chris Torek: apparently DOR really
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* addresses MSR/DRS on a 82072.
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* We used to rely on the VERSION command to tell the
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* difference (which did not work).
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*/
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*fdc->sc_reg_dor = FDC_250KBPS;
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if (*fdc->sc_reg_dor == NE7_RQM)
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code = '2';
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}
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if (code == '7') {
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fdc->sc_flags |= FDC_82077;
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} else {
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fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr;
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fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo;
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fdc->sc_reg_dor = 0;
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}
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#ifdef FD_DEBUG
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if (out_fdc(fdc, NE7CMD_VERSION) == 0 &&
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fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) {
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if (fdc_debug)
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printf("[version cmd]");
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}
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#endif
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/*
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* Configure controller; enable FIFO, Implied seek, no POLL mode?.
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* Note: CFG_EFIFO is active-low, initial threshold value: 8
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*/
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fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK);
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fdconf(fdc);
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if (fdc->sc_flags & FDC_82077) {
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/* Lock configuration across soft resets. */
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out_fdc(fdc, NE7CMD_LOCK | CFG_LOCK);
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if (fdcresult(fdc) != 1)
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printf(" CFGLOCK: unexpected response");
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}
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evcnt_attach(&fdc->sc_dev, "intr", &fdc->sc_intrcnt);
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printf(" pri %d, softpri %d: chip 8207%c\n", pri, PIL_FDSOFT, code);
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/*
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* Controller and drives are represented by one and the same
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* Openprom node, so we can as well check for the floppy boots here.
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*/
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fa.fa_bootdev = 0;
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if ((bp = ca->ca_ra.ra_bp) && strcmp(bp->name, OBP_FDNAME) == 0) {
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/*
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* WOAH THERE! It looks like we can get the bootpath
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* in several different formats!! The faked
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* bootpath (and some v2?) looks like /fd@0,0
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* but the real bootpath on some v2 OpenPROM
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* systems looks like /fd0. In the case of
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* a floppy controller on obio (such as on the sun4m),
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* we use "slot, offset" to determine if this is the
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* right one. --thorpej
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*/
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switch (ca->ca_bustype) {
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case BUS_MAIN:
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if (((bp->val[0] == 0) && /* /fd@0,0 */
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(bp->val[1] == 0)) ||
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((bp->val[0] == -1) && /* /fd0 */
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(bp->val[1] == 0)))
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fa.fa_bootdev = 1;
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break;
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case BUS_OBIO:
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/* /obio0/SUNW,fdtwo@0,700000 */
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if ((bp->val[0] == ca->ca_slot) &&
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(bp->val[1] == ca->ca_offset))
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fa.fa_bootdev = 1;
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break;
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}
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}
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|
/* physical limit: four drives per controller. */
|
|
for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) {
|
|
fa.fa_deftype = NULL; /* unknown */
|
|
fa.fa_deftype = &fd_types[0]; /* XXX */
|
|
(void)config_found(self, (void *)&fa, fdprint);
|
|
}
|
|
|
|
bootpath_store(1, NULL);
|
|
}
|
|
|
|
int
|
|
fdmatch(parent, match, aux)
|
|
struct device *parent;
|
|
void *match, *aux;
|
|
{
|
|
struct fdc_softc *fdc = (void *)parent;
|
|
struct fdc_attach_args *fa = aux;
|
|
int drive = fa->fa_drive;
|
|
int n;
|
|
|
|
if (drive > 0)
|
|
/* XXX - for now, punt > 1 drives */
|
|
return 0;
|
|
|
|
if (fdc->sc_flags & FDC_82077) {
|
|
/* select drive and turn on motor */
|
|
*fdc->sc_reg_dor = drive | FDO_FRST | FDO_MOEN(drive);
|
|
/* wait for motor to spin up */
|
|
delay(250000);
|
|
} else {
|
|
auxregbisc(AUXIO_FDS, 0);
|
|
}
|
|
fdc->sc_nstat = 0;
|
|
out_fdc(fdc, NE7CMD_RECAL);
|
|
out_fdc(fdc, drive);
|
|
/* wait for recalibrate */
|
|
for (n = 0; n < 100000; n++) {
|
|
delay(10);
|
|
if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) {
|
|
/* wait a bit longer till device *really* is ready */
|
|
delay(100000);
|
|
if (out_fdc(fdc, NE7CMD_SENSEI))
|
|
break;
|
|
if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80)
|
|
/*
|
|
* Got `invalid command'; we interpret it
|
|
* to mean that the re-calibrate hasn't in
|
|
* fact finished yet
|
|
*/
|
|
continue;
|
|
break;
|
|
}
|
|
}
|
|
n = fdc->sc_nstat;
|
|
#ifdef FD_DEBUG
|
|
if (fdc_debug) {
|
|
int i;
|
|
printf("fdprobe: %d stati:", n);
|
|
for (i = 0; i < n; i++)
|
|
printf(" %x", fdc->sc_status[i]);
|
|
printf("\n");
|
|
}
|
|
#endif
|
|
if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20)
|
|
return 0;
|
|
/* turn off motor */
|
|
if (fdc->sc_flags & FDC_82077) {
|
|
/* select drive and turn on motor */
|
|
*fdc->sc_reg_dor = FDO_FRST;
|
|
} else {
|
|
auxregbisc(0, AUXIO_FDS);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Controller is working, and drive responded. Attach it.
|
|
*/
|
|
void
|
|
fdattach(parent, self, aux)
|
|
struct device *parent, *self;
|
|
void *aux;
|
|
{
|
|
struct fdc_softc *fdc = (void *)parent;
|
|
struct fd_softc *fd = (void *)self;
|
|
struct fdc_attach_args *fa = aux;
|
|
struct fd_type *type = fa->fa_deftype;
|
|
int drive = fa->fa_drive;
|
|
|
|
/* XXX Allow `flags' to override device type? */
|
|
|
|
if (type)
|
|
printf(": %s %d cyl, %d head, %d sec\n", type->name,
|
|
type->tracks, type->heads, type->sectrac);
|
|
else
|
|
printf(": density unknown\n");
|
|
|
|
fd->sc_cylin = -1;
|
|
fd->sc_drive = drive;
|
|
fd->sc_deftype = type;
|
|
fdc->sc_fd[drive] = fd;
|
|
|
|
/*
|
|
* Initialize and attach the disk structure.
|
|
*/
|
|
fd->sc_dk.dk_name = fd->sc_dv.dv_xname;
|
|
fd->sc_dk.dk_driver = &fddkdriver;
|
|
disk_attach(&fd->sc_dk);
|
|
|
|
/*
|
|
* We're told if we're the boot device in fdcattach().
|
|
*/
|
|
if (fa->fa_bootdev)
|
|
bootdv = &fd->sc_dv;
|
|
|
|
/*
|
|
* Establish a mountroot_hook anyway in case we booted
|
|
* with RB_ASKNAME and get selected as the boot device.
|
|
*/
|
|
mountroot_hook_establish(fd_mountroot_hook, &fd->sc_dv);
|
|
|
|
/* Make sure the drive motor gets turned off at shutdown time. */
|
|
fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd);
|
|
|
|
/* XXX Need to do some more fiddling with sc_dk. */
|
|
dk_establish(&fd->sc_dk, &fd->sc_dv);
|
|
}
|
|
|
|
__inline struct fd_type *
|
|
fd_dev_to_type(fd, dev)
|
|
struct fd_softc *fd;
|
|
dev_t dev;
|
|
{
|
|
int type = FDTYPE(dev);
|
|
|
|
if (type > (sizeof(fd_types) / sizeof(fd_types[0])))
|
|
return NULL;
|
|
return type ? &fd_types[type - 1] : fd->sc_deftype;
|
|
}
|
|
|
|
void
|
|
fdstrategy(bp)
|
|
register struct buf *bp; /* IO operation to perform */
|
|
{
|
|
struct fd_softc *fd;
|
|
int unit = FDUNIT(bp->b_dev);
|
|
int sz;
|
|
int s;
|
|
|
|
/* Valid unit, controller, and request? */
|
|
if (unit >= fdcd.cd_ndevs ||
|
|
(fd = fdcd.cd_devs[unit]) == 0 ||
|
|
bp->b_blkno < 0 ||
|
|
(bp->b_bcount % FDC_BSIZE) != 0) {
|
|
bp->b_error = EINVAL;
|
|
goto bad;
|
|
}
|
|
|
|
/* If it's a null transfer, return immediately. */
|
|
if (bp->b_bcount == 0)
|
|
goto done;
|
|
|
|
sz = howmany(bp->b_bcount, FDC_BSIZE);
|
|
|
|
if (bp->b_blkno + sz > fd->sc_type->size) {
|
|
sz = fd->sc_type->size - bp->b_blkno;
|
|
if (sz == 0) {
|
|
/* If exactly at end of disk, return EOF. */
|
|
bp->b_resid = bp->b_bcount;
|
|
goto done;
|
|
}
|
|
if (sz < 0) {
|
|
/* If past end of disk, return EINVAL. */
|
|
bp->b_error = EINVAL;
|
|
goto bad;
|
|
}
|
|
/* Otherwise, truncate request. */
|
|
bp->b_bcount = sz << DEV_BSHIFT;
|
|
}
|
|
|
|
bp->b_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl;
|
|
|
|
#ifdef FD_DEBUG
|
|
if (fdc_debug > 1)
|
|
printf("fdstrategy: b_blkno %d b_bcount %d blkno %d cylin %d\n",
|
|
bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin);
|
|
#endif
|
|
|
|
/* Queue transfer on drive, activate drive and controller if idle. */
|
|
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 {
|
|
struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent;
|
|
if (fdc->sc_state == DEVIDLE) {
|
|
printf("fdstrategy: controller inactive\n");
|
|
fdcstart(fdc);
|
|
}
|
|
}
|
|
#endif
|
|
splx(s);
|
|
return;
|
|
|
|
bad:
|
|
bp->b_flags |= B_ERROR;
|
|
done:
|
|
/* Toss transfer; we're done early. */
|
|
biodone(bp);
|
|
}
|
|
|
|
void
|
|
fdstart(fd)
|
|
struct fd_softc *fd;
|
|
{
|
|
struct fdc_softc *fdc = (void *)fd->sc_dv.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
|
|
fdfinish(fd, bp)
|
|
struct fd_softc *fd;
|
|
struct buf *bp;
|
|
{
|
|
struct fdc_softc *fdc = (void *)fd->sc_dv.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 = fd->sc_bcount;
|
|
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;
|
|
}
|
|
|
|
void
|
|
fdc_reset(fdc)
|
|
struct fdc_softc *fdc;
|
|
{
|
|
if (fdc->sc_flags & FDC_82077) {
|
|
*fdc->sc_reg_dor = FDO_MOEN(0);
|
|
}
|
|
|
|
*fdc->sc_reg_drs = DRS_RESET;
|
|
delay(10);
|
|
*fdc->sc_reg_drs = 0;
|
|
#ifdef FD_DEBUG
|
|
if (fdc_debug)
|
|
printf("fdc reset\n");
|
|
#endif
|
|
}
|
|
|
|
void
|
|
fd_set_motor(fdc)
|
|
struct fdc_softc *fdc;
|
|
{
|
|
struct fd_softc *fd;
|
|
u_char status;
|
|
int n;
|
|
|
|
if (fdc->sc_flags & FDC_82077) {
|
|
status = FDO_FRST | FDO_FDMAEN;
|
|
if ((fd = fdc->sc_drives.tqh_first) != NULL)
|
|
status |= fd->sc_drive;
|
|
|
|
for (n = 0; n < 4; n++)
|
|
if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR))
|
|
status |= FDO_MOEN(n);
|
|
*fdc->sc_reg_dor = status;
|
|
} else {
|
|
int on = 0;
|
|
|
|
for (n = 0; n < 4; n++)
|
|
if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR))
|
|
on = 1;
|
|
if (on) {
|
|
auxregbisc(AUXIO_FDS, 0);
|
|
} else {
|
|
auxregbisc(0, AUXIO_FDS);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
fd_motor_off(arg)
|
|
void *arg;
|
|
{
|
|
struct fd_softc *fd = arg;
|
|
int s;
|
|
|
|
s = splbio();
|
|
fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT);
|
|
fd_set_motor((struct fdc_softc *)fd->sc_dv.dv_parent);
|
|
splx(s);
|
|
}
|
|
|
|
void
|
|
fd_motor_on(arg)
|
|
void *arg;
|
|
{
|
|
struct fd_softc *fd = arg;
|
|
struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent;
|
|
int s;
|
|
|
|
s = splbio();
|
|
fd->sc_flags &= ~FD_MOTOR_WAIT;
|
|
if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT))
|
|
(void) fdcswintr(fdc);
|
|
splx(s);
|
|
}
|
|
|
|
int
|
|
fdcresult(fdc)
|
|
struct fdc_softc *fdc;
|
|
{
|
|
u_char i;
|
|
int j = 100000,
|
|
n = 0;
|
|
|
|
for (; j; j--) {
|
|
i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB);
|
|
if (i == NE7_RQM)
|
|
return (fdc->sc_nstat = 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++] = *fdc->sc_reg_fifo;
|
|
}
|
|
}
|
|
log(LOG_ERR, "fdcresult: timeout\n");
|
|
return (fdc->sc_nstat = -1);
|
|
}
|
|
|
|
int
|
|
out_fdc(fdc, x)
|
|
struct fdc_softc *fdc;
|
|
u_char x;
|
|
{
|
|
int i = 100000;
|
|
|
|
while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0);
|
|
if (i <= 0)
|
|
return -1;
|
|
|
|
*fdc->sc_reg_fifo = x;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
fdopen(dev, flags, fmt, p)
|
|
dev_t dev;
|
|
int flags, fmt;
|
|
struct proc *p;
|
|
{
|
|
int unit, pmask;
|
|
struct fd_softc *fd;
|
|
struct fd_type *type;
|
|
|
|
unit = FDUNIT(dev);
|
|
if (unit >= fdcd.cd_ndevs)
|
|
return ENXIO;
|
|
fd = fdcd.cd_devs[unit];
|
|
if (fd == 0)
|
|
return ENXIO;
|
|
type = fd_dev_to_type(fd, dev);
|
|
if (type == NULL)
|
|
return ENXIO;
|
|
|
|
if ((fd->sc_flags & FD_OPEN) != 0 &&
|
|
fd->sc_type != type)
|
|
return EBUSY;
|
|
|
|
fd->sc_type = type;
|
|
fd->sc_cylin = -1;
|
|
fd->sc_flags |= FD_OPEN;
|
|
|
|
/*
|
|
* Only update the disklabel if we're not open anywhere else.
|
|
*/
|
|
if (fd->sc_dk.dk_openmask == 0)
|
|
fdgetdisklabel(dev);
|
|
|
|
pmask = (1 << DISKPART(dev));
|
|
|
|
switch (fmt) {
|
|
case S_IFCHR:
|
|
fd->sc_dk.dk_copenmask |= pmask;
|
|
break;
|
|
|
|
case S_IFBLK:
|
|
fd->sc_dk.dk_bopenmask |= pmask;
|
|
break;
|
|
}
|
|
fd->sc_dk.dk_openmask =
|
|
fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
fdclose(dev, flags, fmt, p)
|
|
dev_t dev;
|
|
int flags, fmt;
|
|
struct proc *p;
|
|
{
|
|
struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)];
|
|
int pmask = (1 << DISKPART(dev));
|
|
|
|
fd->sc_flags &= ~FD_OPEN;
|
|
|
|
switch (fmt) {
|
|
case S_IFCHR:
|
|
fd->sc_dk.dk_copenmask &= ~pmask;
|
|
break;
|
|
|
|
case S_IFBLK:
|
|
fd->sc_dk.dk_bopenmask &= ~pmask;
|
|
break;
|
|
}
|
|
fd->sc_dk.dk_openmask =
|
|
fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
fdread(dev, uio, flag)
|
|
dev_t dev;
|
|
struct uio *uio;
|
|
int flag;
|
|
{
|
|
|
|
return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio));
|
|
}
|
|
|
|
int
|
|
fdwrite(dev, uio, flag)
|
|
dev_t dev;
|
|
struct uio *uio;
|
|
int flag;
|
|
{
|
|
|
|
return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio));
|
|
}
|
|
|
|
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) fdcswintr(fdc);
|
|
}
|
|
|
|
void
|
|
fdcstatus(dv, n, s)
|
|
struct device *dv;
|
|
int n;
|
|
char *s;
|
|
{
|
|
struct fdc_softc *fdc = (void *)dv->dv_parent;
|
|
#if 0
|
|
/*
|
|
* A 82072 seems to return <invalid command> on
|
|
* gratuitous Sense Interrupt commands.
|
|
*/
|
|
if (n == 0 && (fdc->sc_flags & FDC_82077)) {
|
|
out_fdc(fdc, NE7CMD_SENSEI);
|
|
(void) fdcresult(fdc);
|
|
n = 2;
|
|
}
|
|
#endif
|
|
|
|
/* Just print last status */
|
|
n = fdc->sc_nstat;
|
|
|
|
printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state);
|
|
|
|
switch (n) {
|
|
case 0:
|
|
printf("\n");
|
|
break;
|
|
case 2:
|
|
printf(fmt1,
|
|
fdc->sc_status[0], NE7_ST0BITS,
|
|
fdc->sc_status[1]);
|
|
break;
|
|
case 7:
|
|
printf(fmt2,
|
|
fdc->sc_status[0], NE7_ST0BITS,
|
|
fdc->sc_status[1], NE7_ST1BITS,
|
|
fdc->sc_status[2], NE7_ST2BITS,
|
|
fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]);
|
|
break;
|
|
#ifdef DIAGNOSTIC
|
|
default:
|
|
printf(" fdcstatus: weird size: %d\n", n);
|
|
break;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void
|
|
fdctimeout(arg)
|
|
void *arg;
|
|
{
|
|
struct fdc_softc *fdc = arg;
|
|
struct fd_softc *fd = fdc->sc_drives.tqh_first;
|
|
int s;
|
|
|
|
s = splbio();
|
|
fdcstatus(&fd->sc_dv, 0, "timeout");
|
|
|
|
if (fd->sc_q.b_actf)
|
|
fdc->sc_state++;
|
|
else
|
|
fdc->sc_state = DEVIDLE;
|
|
|
|
(void) fdcswintr(fdc);
|
|
splx(s);
|
|
}
|
|
|
|
void
|
|
fdcpseudointr(arg)
|
|
void *arg;
|
|
{
|
|
struct fdc_softc *fdc = arg;
|
|
int s;
|
|
|
|
/* Just ensure it has the right spl. */
|
|
s = splbio();
|
|
(void) fdcswintr(fdc);
|
|
splx(s);
|
|
}
|
|
|
|
|
|
#ifdef FDC_C_HANDLER
|
|
/*
|
|
* hardware interrupt entry point: must be converted to `fast'
|
|
* (in-window) handler.
|
|
*/
|
|
int
|
|
fdchwintr(fdc)
|
|
struct fdc_softc *fdc;
|
|
{
|
|
struct buf *bp;
|
|
int read;
|
|
|
|
switch (fdc->sc_istate) {
|
|
case ISTATE_SENSEI:
|
|
out_fdc(fdc, NE7CMD_SENSEI);
|
|
fdcresult(fdc);
|
|
fdc->sc_istate = ISTATE_IDLE;
|
|
ienab_bis(IE_FDSOFT);
|
|
return 1;
|
|
case ISTATE_IDLE:
|
|
case ISTATE_SPURIOUS:
|
|
auxregbisc(0, AUXIO_FDS); /* Does this help? */
|
|
fdcresult(fdc);
|
|
fdc->sc_istate = ISTATE_SPURIOUS;
|
|
printf("fdc: stray hard interrupt... ");
|
|
ienab_bis(IE_FDSOFT);
|
|
return 1;
|
|
case ISTATE_DMA:
|
|
break;
|
|
default:
|
|
printf("fdc: goofed ...\n");
|
|
return 1;
|
|
}
|
|
|
|
read = bp->b_flags & B_READ;
|
|
for (;;) {
|
|
register int msr;
|
|
|
|
msr = *fdc->sc_reg_msr;
|
|
|
|
if ((msr & NE7_RQM) == 0)
|
|
break;
|
|
|
|
if ((msr & NE7_NDM) == 0) {
|
|
fdcresult(fdc);
|
|
fdc->sc_istate = ISTATE_IDLE;
|
|
ienab_bis(IE_FDSOFT);
|
|
printf("fdc: overrun: tc = %d\n", fdc->sc_tc);
|
|
break;
|
|
}
|
|
|
|
if (msr & NE7_DIO) {
|
|
#ifdef DIAGNOSTIC
|
|
if (!read)
|
|
printf("fdxfer: false read\n");
|
|
#endif
|
|
*fdc->sc_data++ = *fdc->sc_reg_fifo;
|
|
} else {
|
|
#ifdef DIAGNOSTIC
|
|
if (read)
|
|
printf("fdxfer: false write\n");
|
|
#endif
|
|
*fdc->sc_reg_fifo = *fdc->sc_data++;
|
|
}
|
|
if (--fdc->sc_tc == 0) {
|
|
auxregbisc(AUXIO_FTC, 0);
|
|
fdc->sc_istate = ISTATE_IDLE;
|
|
delay(10);
|
|
auxregbisc(0, AUXIO_FTC);
|
|
fdcresult(fdc);
|
|
ienab_bis(IE_FDSOFT);
|
|
break;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
#endif
|
|
|
|
int
|
|
fdcswintr(fdc)
|
|
struct fdc_softc *fdc;
|
|
{
|
|
#define st0 fdc->sc_status[0]
|
|
#define st1 fdc->sc_status[1]
|
|
#define cyl fdc->sc_status[1]
|
|
#define OUT_FDC(fdc, c, s) \
|
|
do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0)
|
|
|
|
struct fd_softc *fd;
|
|
struct buf *bp;
|
|
int read, head, sec, nblks;
|
|
struct fd_type *type;
|
|
|
|
|
|
if (fdc->sc_istate != ISTATE_IDLE) {
|
|
/* Trouble... */
|
|
printf("fdc: spurious interrupt: state %d, istate=%d\n",
|
|
fdc->sc_state, fdc->sc_istate);
|
|
fdc->sc_istate = ISTATE_IDLE;
|
|
if (fdc->sc_state == RESETCOMPLETE ||
|
|
fdc->sc_state == RESETTIMEDOUT) {
|
|
panic("fdcintr: spurious interrupt can't be cleared");
|
|
}
|
|
goto doreset;
|
|
}
|
|
|
|
loop:
|
|
/* Is there a drive for the controller to do a transfer with? */
|
|
fd = fdc->sc_drives.tqh_first;
|
|
if (fd == NULL) {
|
|
fdc->sc_state = DEVIDLE;
|
|
return 0;
|
|
}
|
|
|
|
/* Is there a transfer to this drive? If not, deactivate drive. */
|
|
bp = fd->sc_q.b_actf;
|
|
if (bp == NULL) {
|
|
fd->sc_ops = 0;
|
|
TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain);
|
|
fd->sc_q.b_active = 0;
|
|
goto loop;
|
|
}
|
|
|
|
switch (fdc->sc_state) {
|
|
case DEVIDLE:
|
|
fdc->sc_errors = 0;
|
|
fd->sc_skip = 0;
|
|
fd->sc_bcount = bp->b_bcount;
|
|
fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE);
|
|
untimeout(fd_motor_off, fd);
|
|
if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) {
|
|
fdc->sc_state = MOTORWAIT;
|
|
return 1;
|
|
}
|
|
if ((fd->sc_flags & FD_MOTOR) == 0) {
|
|
/* Turn on the motor, being careful about pairing. */
|
|
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);
|
|
fdc->sc_state = MOTORWAIT;
|
|
if (fdc->sc_flags & FDC_82077) { /* XXX */
|
|
/* Allow .25s for motor to stabilize. */
|
|
timeout(fd_motor_on, fd, hz / 4);
|
|
} else {
|
|
fd->sc_flags &= ~FD_MOTOR_WAIT;
|
|
goto loop;
|
|
}
|
|
return 1;
|
|
}
|
|
/* Make sure the right drive is selected. */
|
|
fd_set_motor(fdc);
|
|
|
|
/* fall through */
|
|
case DOSEEK:
|
|
doseek:
|
|
if (fdc->sc_flags & FDC_EIS) {
|
|
fd->sc_cylin = bp->b_cylin;
|
|
/* We use implied seek */
|
|
goto doio;
|
|
}
|
|
|
|
if (fd->sc_cylin == bp->b_cylin)
|
|
goto doio;
|
|
|
|
/* specify command */
|
|
OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT);
|
|
OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT);
|
|
OUT_FDC(fdc, 6, SEEKTIMEDOUT); /* XXX head load time == 6ms */
|
|
|
|
fdc->sc_istate = ISTATE_SENSEI;
|
|
/* seek function */
|
|
OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT);
|
|
OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */
|
|
OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT);
|
|
|
|
fd->sc_cylin = -1;
|
|
fdc->sc_state = SEEKWAIT;
|
|
fdc->sc_nstat = 0;
|
|
|
|
fd->sc_dk.dk_seek++;
|
|
disk_busy(&fd->sc_dk);
|
|
|
|
timeout(fdctimeout, fdc, 4 * hz);
|
|
return 1;
|
|
|
|
case DOIO:
|
|
doio:
|
|
type = fd->sc_type;
|
|
sec = fd->sc_blkno % type->seccyl;
|
|
nblks = type->seccyl - sec;
|
|
nblks = min(nblks, fd->sc_bcount / FDC_BSIZE);
|
|
nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE);
|
|
fd->sc_nblks = nblks;
|
|
fd->sc_nbytes = nblks * FDC_BSIZE;
|
|
head = sec / type->sectrac;
|
|
sec -= head * type->sectrac;
|
|
#ifdef DIAGNOSTIC
|
|
{int block;
|
|
block = (fd->sc_cylin * type->heads + head) * type->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;
|
|
|
|
/* Setup for pseudo DMA */
|
|
fdc->sc_data = bp->b_data + fd->sc_skip;
|
|
fdc->sc_tc = fd->sc_nbytes;
|
|
|
|
*fdc->sc_reg_drs = type->rate;
|
|
#ifdef FD_DEBUG
|
|
if (fdc_debug > 1)
|
|
printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n",
|
|
read ? "read" : "write", fd->sc_drive,
|
|
fd->sc_cylin, head, sec, nblks);
|
|
#endif
|
|
fdc->sc_state = IOCOMPLETE;
|
|
fdc->sc_istate = ISTATE_DMA;
|
|
fdc->sc_nstat = 0;
|
|
if (read)
|
|
OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); /* READ */
|
|
else
|
|
OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); /* WRITE */
|
|
OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT);
|
|
OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /* track */
|
|
OUT_FDC(fdc, head, IOTIMEDOUT);
|
|
OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /* sector +1 */
|
|
OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/* sector size */
|
|
OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/* sectors/track */
|
|
OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /* gap1 size */
|
|
OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/* data length */
|
|
|
|
disk_busy(&fd->sc_dk);
|
|
|
|
/* allow 2 seconds for operation */
|
|
timeout(fdctimeout, fdc, 2 * hz);
|
|
return 1; /* will return later */
|
|
|
|
case SEEKWAIT:
|
|
untimeout(fdctimeout, fdc);
|
|
fdc->sc_state = SEEKCOMPLETE;
|
|
if (fdc->sc_flags & FDC_NEEDHEADSETTLE) {
|
|
/* allow 1/50 second for heads to settle */
|
|
timeout(fdcpseudointr, fdc, hz / 50);
|
|
return 1; /* will return later */
|
|
}
|
|
|
|
case SEEKCOMPLETE:
|
|
disk_unbusy(&fd->sc_dk, 0); /* no data on seek */
|
|
|
|
/* Make sure seek really happened. */
|
|
if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 ||
|
|
cyl != bp->b_cylin * fd->sc_type->step) {
|
|
#ifdef FD_DEBUG
|
|
if (fdc_debug)
|
|
fdcstatus(&fd->sc_dv, 2, "seek failed");
|
|
#endif
|
|
fdcretry(fdc);
|
|
goto loop;
|
|
}
|
|
fd->sc_cylin = bp->b_cylin;
|
|
goto doio;
|
|
|
|
case IOTIMEDOUT:
|
|
auxregbisc(AUXIO_FTC, 0);
|
|
delay(10);
|
|
auxregbisc(0, AUXIO_FTC);
|
|
(void)fdcresult(fdc);
|
|
case SEEKTIMEDOUT:
|
|
case RECALTIMEDOUT:
|
|
case RESETTIMEDOUT:
|
|
fdcretry(fdc);
|
|
goto loop;
|
|
|
|
case IOCOMPLETE: /* IO DONE, post-analyze */
|
|
untimeout(fdctimeout, fdc);
|
|
|
|
disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid));
|
|
|
|
if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) {
|
|
#ifdef FD_DEBUG
|
|
if (fdc_debug) {
|
|
fdcstatus(&fd->sc_dv, 7,
|
|
bp->b_flags & B_READ
|
|
? "read failed" : "write failed");
|
|
printf("blkno %d nblks %d tc %d\n",
|
|
fd->sc_blkno, fd->sc_nblks, fdc->sc_tc);
|
|
}
|
|
#endif
|
|
if (fdc->sc_nstat == 7 &&
|
|
(st1 & ST1_OVERRUN) == ST1_OVERRUN) {
|
|
|
|
/*
|
|
* Silently retry overruns if no other
|
|
* error bit is set. Adjust threshold.
|
|
*/
|
|
int thr = fdc->sc_cfg & CFG_THRHLD_MASK;
|
|
if (thr < 15) {
|
|
thr++;
|
|
fdc->sc_cfg &= ~CFG_THRHLD_MASK;
|
|
fdc->sc_cfg |= (thr & CFG_THRHLD_MASK);
|
|
#ifdef FD_DEBUG
|
|
if (fdc_debug)
|
|
printf("fdc: %d -> threshold\n", thr);
|
|
#endif
|
|
fdconf(fdc);
|
|
fdc->sc_state = DOIO;
|
|
fdc->sc_overruns = 0;
|
|
}
|
|
if (++fdc->sc_overruns < 3)
|
|
goto loop;
|
|
}
|
|
fdcretry(fdc);
|
|
goto loop;
|
|
}
|
|
if (fdc->sc_errors) {
|
|
diskerr(bp, "fd", "soft error", LOG_PRINTF,
|
|
fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL);
|
|
printf("\n");
|
|
fdc->sc_errors = 0;
|
|
} else {
|
|
if (--fdc->sc_overruns < -20) {
|
|
int thr = fdc->sc_cfg & CFG_THRHLD_MASK;
|
|
if (thr > 0) {
|
|
thr--;
|
|
fdc->sc_cfg &= ~CFG_THRHLD_MASK;
|
|
fdc->sc_cfg |= (thr & CFG_THRHLD_MASK);
|
|
#ifdef FD_DEBUG
|
|
if (fdc_debug)
|
|
printf("fdc: %d -> threshold\n", thr);
|
|
#endif
|
|
fdconf(fdc);
|
|
}
|
|
fdc->sc_overruns = 0;
|
|
}
|
|
}
|
|
fd->sc_blkno += fd->sc_nblks;
|
|
fd->sc_skip += fd->sc_nbytes;
|
|
fd->sc_bcount -= fd->sc_nbytes;
|
|
if (fd->sc_bcount > 0) {
|
|
bp->b_cylin = fd->sc_blkno / fd->sc_type->seccyl;
|
|
goto doseek;
|
|
}
|
|
fdfinish(fd, bp);
|
|
goto loop;
|
|
|
|
case DORESET:
|
|
doreset:
|
|
/* try a reset, keep motor on */
|
|
fd_set_motor(fdc);
|
|
delay(100);
|
|
fdc_reset(fdc);
|
|
fdc->sc_nstat = 0;
|
|
fdc->sc_istate = ISTATE_SENSEI;
|
|
fdc->sc_state = RESETCOMPLETE;
|
|
timeout(fdctimeout, fdc, hz / 2);
|
|
return 1; /* will return later */
|
|
|
|
case RESETCOMPLETE:
|
|
untimeout(fdctimeout, fdc);
|
|
fdconf(fdc);
|
|
|
|
/* fall through */
|
|
case DORECAL:
|
|
fdc->sc_state = RECALWAIT;
|
|
fdc->sc_istate = ISTATE_SENSEI;
|
|
fdc->sc_nstat = 0;
|
|
/* recalibrate function */
|
|
OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT);
|
|
OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT);
|
|
timeout(fdctimeout, fdc, 5 * hz);
|
|
return 1; /* will return later */
|
|
|
|
case RECALWAIT:
|
|
untimeout(fdctimeout, fdc);
|
|
fdc->sc_state = RECALCOMPLETE;
|
|
if (fdc->sc_flags & FDC_NEEDHEADSETTLE) {
|
|
/* allow 1/30 second for heads to settle */
|
|
timeout(fdcpseudointr, fdc, hz / 30);
|
|
return 1; /* will return later */
|
|
}
|
|
|
|
case RECALCOMPLETE:
|
|
if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) {
|
|
#ifdef FD_DEBUG
|
|
if (fdc_debug)
|
|
fdcstatus(&fd->sc_dv, 2, "recalibrate failed");
|
|
#endif
|
|
fdcretry(fdc);
|
|
goto loop;
|
|
}
|
|
fd->sc_cylin = 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_dv, 0, "stray interrupt");
|
|
return 1;
|
|
}
|
|
#ifdef DIAGNOSTIC
|
|
panic("fdcintr: impossible");
|
|
#endif
|
|
#undef st0
|
|
#undef st1
|
|
#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;
|
|
|
|
fdc->sc_overruns = 0;
|
|
|
|
switch (fdc->sc_errors) {
|
|
case 0:
|
|
/* try again */
|
|
fdc->sc_state =
|
|
(fdc->sc_flags & FDC_EIS) ? DOIO : DOSEEK;
|
|
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 / FDC_BSIZE, (struct disklabel *)NULL);
|
|
|
|
printf(fmt2,
|
|
fdc->sc_status[0], NE7_ST0BITS,
|
|
fdc->sc_status[1], NE7_ST1BITS,
|
|
fdc->sc_status[2], NE7_ST2BITS,
|
|
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_errors++;
|
|
}
|
|
|
|
int
|
|
fdsize(dev)
|
|
dev_t dev;
|
|
{
|
|
|
|
/* Swapping to floppies would not make sense. */
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fddump(dev, blkno, va, size)
|
|
dev_t dev;
|
|
daddr_t blkno;
|
|
caddr_t va;
|
|
size_t size;
|
|
{
|
|
|
|
/* Not implemented. */
|
|
return EINVAL;
|
|
}
|
|
|
|
int
|
|
fdioctl(dev, cmd, addr, flag, p)
|
|
dev_t dev;
|
|
u_long cmd;
|
|
caddr_t addr;
|
|
int flag;
|
|
struct proc *p;
|
|
{
|
|
struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)];
|
|
int error;
|
|
|
|
switch (cmd) {
|
|
case DIOCGDINFO:
|
|
*(struct disklabel *)addr = *(fd->sc_dk.dk_label);
|
|
return 0;
|
|
|
|
case DIOCWLABEL:
|
|
if ((flag & FWRITE) == 0)
|
|
return EBADF;
|
|
/* XXX do something */
|
|
return 0;
|
|
|
|
case DIOCWDINFO:
|
|
if ((flag & FWRITE) == 0)
|
|
return EBADF;
|
|
|
|
error = setdisklabel(fd->sc_dk.dk_label,
|
|
(struct disklabel *)addr, 0,
|
|
fd->sc_dk.dk_cpulabel);
|
|
if (error)
|
|
return error;
|
|
|
|
error = writedisklabel(dev, fdstrategy,
|
|
fd->sc_dk.dk_label,
|
|
fd->sc_dk.dk_cpulabel);
|
|
return error;
|
|
|
|
case DIOCLOCK:
|
|
/*
|
|
* Nothing to do here, really.
|
|
*/
|
|
return 0;
|
|
|
|
case DIOCEJECT:
|
|
fd_do_eject();
|
|
return 0;
|
|
|
|
#ifdef DEBUG
|
|
case _IO('f', 100):
|
|
{
|
|
int i;
|
|
struct fdc_softc *fdc = (struct fdc_softc *)
|
|
fd->sc_dv.dv_parent;
|
|
|
|
out_fdc(fdc, NE7CMD_DUMPREG);
|
|
fdcresult(fdc);
|
|
printf("dumpreg(%d regs): <", fdc->sc_nstat);
|
|
for (i = 0; i < fdc->sc_nstat; i++)
|
|
printf(" %x", fdc->sc_status[i]);
|
|
printf(">\n");
|
|
}
|
|
|
|
return 0;
|
|
case _IOW('f', 101, int):
|
|
((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg &=
|
|
~CFG_THRHLD_MASK;
|
|
((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg |=
|
|
(*(int *)addr & CFG_THRHLD_MASK);
|
|
fdconf((struct fdc_softc *) fd->sc_dv.dv_parent);
|
|
return 0;
|
|
case _IO('f', 102):
|
|
{
|
|
int i;
|
|
struct fdc_softc *fdc = (struct fdc_softc *)
|
|
fd->sc_dv.dv_parent;
|
|
out_fdc(fdc, NE7CMD_SENSEI);
|
|
fdcresult(fdc);
|
|
printf("sensei(%d regs): <", fdc->sc_nstat);
|
|
for (i=0; i< fdc->sc_nstat; i++)
|
|
printf(" 0x%x", fdc->sc_status[i]);
|
|
}
|
|
printf(">\n");
|
|
return 0;
|
|
#endif
|
|
default:
|
|
return ENOTTY;
|
|
}
|
|
|
|
#ifdef DIAGNOSTIC
|
|
panic("fdioctl: impossible");
|
|
#endif
|
|
}
|
|
|
|
void
|
|
fdgetdisklabel(dev)
|
|
dev_t dev;
|
|
{
|
|
int unit = FDUNIT(dev), i;
|
|
struct fd_softc *fd = fdcd.cd_devs[unit];
|
|
struct disklabel *lp = fd->sc_dk.dk_label;
|
|
struct cpu_disklabel *clp = fd->sc_dk.dk_cpulabel;
|
|
|
|
bzero(lp, sizeof(struct disklabel));
|
|
bzero(lp, sizeof(struct cpu_disklabel));
|
|
|
|
lp->d_type = DTYPE_FLOPPY;
|
|
lp->d_secsize = FDC_BSIZE;
|
|
lp->d_secpercyl = fd->sc_type->seccyl;
|
|
lp->d_nsectors = fd->sc_type->sectrac;
|
|
lp->d_ncylinders = fd->sc_type->tracks;
|
|
lp->d_ntracks = fd->sc_type->heads; /* Go figure... */
|
|
lp->d_rpm = 3600; /* XXX like it matters... */
|
|
|
|
strncpy(lp->d_typename, "floppy", sizeof(lp->d_typename));
|
|
strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname));
|
|
lp->d_interleave = 1;
|
|
|
|
lp->d_partitions[RAW_PART].p_offset = 0;
|
|
lp->d_partitions[RAW_PART].p_size = lp->d_secpercyl * lp->d_ncylinders;
|
|
lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED;
|
|
lp->d_npartitions = RAW_PART + 1;
|
|
|
|
lp->d_magic = DISKMAGIC;
|
|
lp->d_magic2 = DISKMAGIC;
|
|
lp->d_checksum = dkcksum(lp);
|
|
|
|
/*
|
|
* Call the generic disklabel extraction routine. If there's
|
|
* not a label there, fake it.
|
|
*/
|
|
if (readdisklabel(dev, fdstrategy, lp, clp) != NULL) {
|
|
strncpy(lp->d_packname, "default label",
|
|
sizeof(lp->d_packname));
|
|
/*
|
|
* Reset the partition info; it might have gotten
|
|
* trashed in readdisklabel().
|
|
*
|
|
* XXX Why do we have to do this? readdisklabel()
|
|
* should be safe...
|
|
*/
|
|
for (i = 0; i < MAXPARTITIONS; ++i) {
|
|
lp->d_partitions[i].p_offset = 0;
|
|
if (i == RAW_PART) {
|
|
lp->d_partitions[i].p_size =
|
|
lp->d_secpercyl * lp->d_ncylinders;
|
|
lp->d_partitions[i].p_fstype = FS_BSDFFS;
|
|
} else {
|
|
lp->d_partitions[i].p_size = 0;
|
|
lp->d_partitions[i].p_fstype = FS_UNUSED;
|
|
}
|
|
}
|
|
lp->d_npartitions = RAW_PART + 1;
|
|
}
|
|
}
|
|
|
|
void
|
|
fd_do_eject()
|
|
{
|
|
|
|
auxregbisc(AUXIO_FDS, AUXIO_FEJ);
|
|
delay(10);
|
|
auxregbisc(AUXIO_FEJ, AUXIO_FDS);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
void
|
|
fd_mountroot_hook(dev)
|
|
struct device *dev;
|
|
{
|
|
int c;
|
|
|
|
fd_do_eject();
|
|
printf("Insert filesystem floppy and press return.");
|
|
for (;;) {
|
|
c = cngetc();
|
|
if ((c == '\r') || (c == '\n')) {
|
|
printf("\n");
|
|
return;
|
|
}
|
|
}
|
|
}
|