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-rw-r--r--sys/arch/pica/dev/fd.c1126
1 files changed, 1126 insertions, 0 deletions
diff --git a/sys/arch/pica/dev/fd.c b/sys/arch/pica/dev/fd.c
new file mode 100644
index 00000000000..caa9769a7ea
--- /dev/null
+++ b/sys/arch/pica/dev/fd.c
@@ -0,0 +1,1126 @@
+/* $NetBSD: fd.c,v 1.78 1995/07/04 07:23:09 mycroft Exp $ */
+
+/*-
+ * Copyright (c) 1993, 1994, 1995 Charles Hannum.
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Don Ahn.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)fd.c 7.4 (Berkeley) 5/25/91
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/conf.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#include <sys/device.h>
+#include <sys/disklabel.h>
+#include <sys/dkstat.h>
+#include <sys/disk.h>
+#include <sys/buf.h>
+#include <sys/uio.h>
+#include <sys/syslog.h>
+#include <sys/queue.h>
+
+#include <machine/cpu.h>
+#include <machine/pio.h>
+#include <machine/autoconf.h>
+
+#include <pica/dev/fdreg.h>
+#include <pica/dev/dma.h>
+
+
+#define FDUNIT(dev) (minor(dev) / 8)
+#define FDTYPE(dev) (minor(dev) % 8)
+
+#define b_cylin b_resid
+
+enum fdc_state {
+ DEVIDLE = 0,
+ MOTORWAIT,
+ DOSEEK,
+ SEEKWAIT,
+ SEEKTIMEDOUT,
+ SEEKCOMPLETE,
+ DOIO,
+ IOCOMPLETE,
+ IOTIMEDOUT,
+ DORESET,
+ RESETCOMPLETE,
+ RESETTIMEDOUT,
+ DORECAL,
+ RECALWAIT,
+ RECALTIMEDOUT,
+ RECALCOMPLETE,
+};
+
+/* software state, per controller */
+struct fdc_softc {
+ struct device sc_dev; /* boilerplate */
+
+ struct dma_softc __dma;
+ struct dma_softc *dma;
+
+ int sc_iobase;
+
+ struct fd_softc *sc_fd[4]; /* pointers to children */
+ TAILQ_HEAD(drivehead, fd_softc) sc_drives;
+ enum fdc_state sc_state;
+ int sc_errors; /* number of retries so far */
+ u_char sc_status[7]; /* copy of registers */
+};
+
+/* controller driver configuration */
+int fdcprobe __P((struct device *, void *, void *));
+void fdcattach __P((struct device *, struct device *, void *));
+
+struct cfdriver fdccd = {
+ NULL, "fdc", fdcprobe, fdcattach, DV_DULL, sizeof(struct fdc_softc)
+};
+
+/*
+ * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how
+ * we tell them apart.
+ */
+struct fd_type {
+ int sectrac; /* sectors per track */
+ int heads; /* number of heads */
+ int seccyl; /* sectors per cylinder */
+ int secsize; /* size code for sectors */
+ int datalen; /* data len when secsize = 0 */
+ int steprate; /* step rate and head unload time */
+ int gap1; /* gap len between sectors */
+ int gap2; /* formatting gap */
+ int tracks; /* total num of tracks */
+ int size; /* size of disk in sectors */
+ int step; /* steps per cylinder */
+ int rate; /* transfer speed code */
+ char *name;
+};
+
+/* The order of entries in the following table is important -- BEWARE! */
+struct fd_type fd_types[] = {
+ { 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,"1.44MB" }, /* 1.44MB diskette */
+ { 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS, "1.2MB" }, /* 1.2 MB AT-diskettes */
+ { 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS, "360KB/AT" }, /* 360kB in 1.2MB drive */
+ { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS, "360KB/PC" }, /* 360kB PC diskettes */
+ { 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS, "720KB" }, /* 3.5" 720kB diskette */
+ { 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS, "720KB/x" }, /* 720kB in 1.2MB drive */
+ { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS, "360KB/x" }, /* 360kB in 720kB drive */
+};
+
+/* software state, per disk (with up to 4 disks per ctlr) */
+struct fd_softc {
+ struct device sc_dev;
+ struct dkdevice sc_dk;
+
+ struct fd_type *sc_deftype; /* default type descriptor */
+ struct fd_type *sc_type; /* current type descriptor */
+
+ daddr_t sc_blkno; /* starting block number */
+ int sc_bcount; /* byte count left */
+ int sc_skip; /* bytes already transferred */
+ int sc_nblks; /* number of blocks currently tranferring */
+ int sc_nbytes; /* number of bytes currently tranferring */
+
+ int sc_drive; /* physical unit number */
+ int sc_flags;
+#define FD_OPEN 0x01 /* it's open */
+#define FD_MOTOR 0x02 /* motor should be on */
+#define FD_MOTOR_WAIT 0x04 /* motor coming up */
+ int sc_cylin; /* where we think the head is */
+
+ TAILQ_ENTRY(fd_softc) sc_drivechain;
+ int sc_ops; /* I/O ops since last switch */
+ struct buf sc_q; /* head of buf chain */
+};
+
+/* floppy driver configuration */
+int fdprobe __P((struct device *, void *, void *));
+void fdattach __P((struct device *, struct device *, void *));
+
+struct cfdriver fdcd = {
+ NULL, "fd", fdprobe, fdattach, DV_DISK, sizeof(struct fd_softc)
+};
+
+void fdgetdisklabel __P((struct fd_softc *));
+int fd_get_parms __P((struct fd_softc *));
+void fdstrategy __P((struct buf *));
+void fdstart __P((struct fd_softc *));
+
+struct dkdriver fddkdriver = { fdstrategy };
+
+struct fd_type *fd_nvtotype __P((char *, int, int));
+void fd_set_motor __P((struct fdc_softc *fdc, int reset));
+void fd_motor_off __P((void *arg));
+void fd_motor_on __P((void *arg));
+int fdcresult __P((struct fdc_softc *fdc));
+int out_fdc __P((int iobase, u_char x));
+void fdcstart __P((struct fdc_softc *fdc));
+void fdcstatus __P((struct device *dv, int n, char *s));
+void fdctimeout __P((void *arg));
+void fdcpseudointr __P((void *arg));
+int fdcintr __P((void *));
+void fdcretry __P((struct fdc_softc *fdc));
+void fdfinish __P((struct fd_softc *fd, struct buf *bp));
+
+int
+fdcprobe(parent, match, aux)
+ struct device *parent;
+ void *match, *aux;
+{
+ register struct confargs *ca = aux;
+ int iobase = (long)BUS_CVTADDR(ca);
+
+ if (!BUS_MATCHNAME(ca, "fdc"))
+ return (0);
+
+ /* reset */
+ outb(iobase + fdout, 0);
+ delay(100);
+ outb(iobase + fdout, FDO_FRST);
+
+ /* see if it can handle a command */
+ if (out_fdc(iobase, NE7CMD_SPECIFY) < 0)
+ return 0;
+ out_fdc(iobase, 0xdf);
+ out_fdc(iobase, 2);
+
+ return 1;
+}
+
+/*
+ * Arguments passed between fdcattach and fdprobe.
+ */
+struct fdc_attach_args {
+ int fa_drive;
+ struct fd_type *fa_deftype;
+};
+
+/*
+ * Print the location of a disk drive (called just before attaching the
+ * the drive). If `fdc' is not NULL, the drive was found but was not
+ * in the system config file; print the drive name as well.
+ * Return QUIET (config_find ignores this if the device was configured) to
+ * avoid printing `fdN not configured' messages.
+ */
+int
+fdprint(aux, fdc)
+ void *aux;
+ char *fdc;
+{
+ register struct fdc_attach_args *fa = aux;
+
+ if (!fdc)
+ printf(" drive %d", fa->fa_drive);
+ return QUIET;
+}
+
+void
+fdcattach(parent, self, aux)
+ struct device *parent, *self;
+ void *aux;
+{
+ struct fdc_softc *fdc = (void *)self;
+ struct confargs *ca = aux;
+ struct fdc_attach_args fa;
+ int type;
+
+ fdc->sc_iobase = (long)BUS_CVTADDR(ca);
+ fdc->sc_state = DEVIDLE;
+ TAILQ_INIT(&fdc->sc_drives);
+
+ fdc->dma = &fdc->__dma;
+ fdc_dma_init(fdc->dma);
+
+ printf("\n");
+
+ BUS_INTR_ESTABLISH(ca, fdcintr, fdc);
+
+ /*
+ * No way yet to determine default disk types.
+ * we assume 1.44 3.5" type for the moment.
+ */
+ type = 0;
+
+ /* physical limit: two drives per controller. */
+ for (fa.fa_drive = 0; fa.fa_drive < 2; fa.fa_drive++) {
+ if (type >= 0 && fa.fa_drive < 2)
+ fa.fa_deftype = fd_nvtotype(fdc->sc_dev.dv_xname,
+ type, fa.fa_drive);
+ else
+ fa.fa_deftype = NULL; /* unknown */
+ (void)config_found(self, (void *)&fa, fdprint);
+ }
+}
+
+int
+fdprobe(parent, match, aux)
+ struct device *parent;
+ void *match, *aux;
+{
+ struct fdc_softc *fdc = (void *)parent;
+ struct cfdata *cf = match;
+ struct fdc_attach_args *fa = aux;
+ int drive = fa->fa_drive;
+ int iobase = fdc->sc_iobase;
+ int n;
+
+ if (cf->cf_loc[0] != -1 && cf->cf_loc[0] != drive)
+ return 0;
+
+ /* select drive and turn on motor */
+ outb(iobase + fdout, drive | FDO_FRST | FDO_MOEN(drive));
+ /* wait for motor to spin up */
+ delay(500000);
+ out_fdc(iobase, NE7CMD_RECAL);
+ out_fdc(iobase, drive);
+ /* wait for recalibrate */
+ delay(2000000);
+ out_fdc(iobase, NE7CMD_SENSEI);
+ n = fdcresult(fdc);
+#ifdef FD_DEBUG
+ {
+ int i;
+ printf("fdprobe: status");
+ 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 */
+ outb(iobase + fdout, FDO_FRST);
+
+ 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;
+ fd->sc_dk.dk_driver = &fddkdriver;
+ /* XXX Need to do some more fiddling with sc_dk. */
+ dk_establish(&fd->sc_dk, &fd->sc_dev);
+}
+
+/*
+ * Translate nvram type into internal data structure. Return NULL for
+ * none/unknown/unusable.
+ */
+struct fd_type *
+fd_nvtotype(fdc, nvraminfo, drive)
+ char *fdc;
+ int nvraminfo, drive;
+{
+ int type;
+
+ type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0;
+#if 0
+ switch (type) {
+ case NVRAM_DISKETTE_NONE:
+ return NULL;
+ case NVRAM_DISKETTE_12M:
+ return &fd_types[1];
+ case NVRAM_DISKETTE_TYPE5:
+ case NVRAM_DISKETTE_TYPE6:
+ /* XXX We really ought to handle 2.88MB format. */
+ case NVRAM_DISKETTE_144M:
+ return &fd_types[0];
+ case NVRAM_DISKETTE_360K:
+ return &fd_types[3];
+ case NVRAM_DISKETTE_720K:
+ return &fd_types[4];
+ default:
+ printf("%s: drive %d: unknown device type 0x%x\n",
+ fdc, drive, type);
+ return NULL;
+ }
+#else
+ return &fd_types[0]; /* Use only 1.44 for now */
+#endif
+}
+
+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
+ printf("fdstrategy: b_blkno %d b_bcount %d blkno %d cylin %d sz %d\n",
+ bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin, sz);
+#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_dev.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_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
+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 = 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, 10 * hz);
+ fdc->sc_state = DEVIDLE;
+}
+
+int
+fdread(dev, uio)
+ dev_t dev;
+ struct uio *uio;
+{
+
+ return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio));
+}
+
+int
+fdwrite(dev, uio)
+ dev_t dev;
+ struct uio *uio;
+{
+
+ return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio));
+}
+
+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;
+{
+ 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_dev.dv_parent, 0);
+ splx(s);
+}
+
+void
+fd_motor_on(arg)
+ void *arg;
+{
+ struct fd_softc *fd = arg;
+ struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
+ int s;
+
+ 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;
+{
+ int iobase = fdc->sc_iobase;
+ u_char i;
+ int j = 400000, /* Empirical, should do at 150 Mhz to */
+ 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)
+ int 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 unit;
+ 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;
+
+ return 0;
+}
+
+int
+fdclose(dev, flags)
+ dev_t dev;
+ int flags;
+{
+ struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)];
+
+ 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;
+ int iobase = fdc->sc_iobase;
+
+ if (n == 0) {
+ out_fdc(fdc->sc_iobase, NE7CMD_SENSEI);
+ (void) fdcresult(fdc);
+ n = 2;
+ }
+
+ printf("%s: %s", dv->dv_xname, s);
+
+ switch (n) {
+ case 0:
+ printf("\n");
+ break;
+ case 2:
+ printf(" (st0 %b cyl %d)\n",
+ fdc->sc_status[0], NE7_ST0BITS,
+ fdc->sc_status[1]);
+ break;
+ case 7:
+ printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n",
+ 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("\nfdcstatus: weird size");
+ 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_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;
+{
+ int s;
+
+ /* Just ensure it has the right spl. */
+ s = splbio();
+ (void) fdcintr(arg);
+ splx(s);
+}
+
+int
+fdcintr(arg)
+ void *arg;
+{
+ struct fdc_softc *fdc = arg;
+#define st0 fdc->sc_status[0]
+#define cyl fdc->sc_status[1]
+ struct fd_softc *fd;
+ struct buf *bp;
+ int iobase = fdc->sc_iobase;
+ int read, head, trac, sec, i, s, nblks;
+ struct fd_type *type;
+
+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 1;
+ }
+
+ /* 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, 0);
+ fdc->sc_state = MOTORWAIT;
+ /* Allow .5s for motor to stabilize. */
+ timeout(fd_motor_on, fd, hz / 2);
+ return 1;
+ }
+ /* Make sure the right drive is selected. */
+ fd_set_motor(fdc, 0);
+
+ /* fall through */
+ case DOSEEK:
+ doseek:
+ if (fd->sc_cylin == bp->b_cylin)
+ goto doio;
+
+ out_fdc(iobase, NE7CMD_SPECIFY);/* specify command */
+ out_fdc(iobase, fd->sc_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_type->step);
+
+ fd->sc_cylin = -1;
+ fdc->sc_state = SEEKWAIT;
+ 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
+ MachFlushDCache(bp->b_data + fd->sc_skip, fd->sc_nbytes);
+ read = bp->b_flags & B_READ ? DMA_FROM_DEV : DMA_TO_DEV;
+ DMA_START(fdc->dma, bp->b_data + fd->sc_skip, fd->sc_nbytes, read);
+ outb(iobase + fdctl, type->rate);
+#ifdef FD_DEBUG
+ 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
+ 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_cylin); /* track */
+ out_fdc(iobase, head);
+ out_fdc(iobase, sec + 1); /* sector +1 */
+ out_fdc(iobase, type->secsize); /* sector size */
+ out_fdc(iobase, type->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 * fd->sc_type->step) {
+#ifdef FD_DEBUG
+ fdcstatus(&fd->sc_dev, 2, "seek failed");
+#endif
+ fdcretry(fdc);
+ goto loop;
+ }
+ fd->sc_cylin = bp->b_cylin;
+ goto doio;
+
+ case IOTIMEDOUT:
+ DMA_RESET(fdc->dma);
+
+ case SEEKTIMEDOUT:
+ case RECALTIMEDOUT:
+ case RESETTIMEDOUT:
+ fdcretry(fdc);
+ goto loop;
+
+ case IOCOMPLETE: /* IO DONE, post-analyze */
+ untimeout(fdctimeout, fdc);
+ if (fdcresult(fdc) != 7 || (st0 & 0xf8) != 0) {
+ DMA_RESET(fdc->dma);
+#ifdef FD_DEBUG
+ fdcstatus(&fd->sc_dev, 7, bp->b_flags & B_READ ?
+ "read failed" : "write failed");
+ printf("blkno %d nblks %d\n",
+ fd->sc_blkno, fd->sc_nblks);
+#endif
+ fdcretry(fdc);
+ goto loop;
+ }
+ DMA_END(fdc->dma);
+ read = bp->b_flags & B_READ;
+ 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;
+ }
+ 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:
+ /* 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) {
+#ifdef FD_DEBUG
+ fdcstatus(&fd->sc_dev, 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_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_errors) {
+ 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 / FDC_BSIZE, (struct disklabel *)NULL);
+ printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n",
+ 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 ENXIO;
+}
+
+int
+fdioctl(dev, cmd, addr, flag)
+ dev_t dev;
+ u_long cmd;
+ caddr_t addr;
+ int flag;
+{
+ struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)];
+ struct disklabel buffer;
+ int error;
+
+ switch (cmd) {
+ case DIOCGDINFO:
+ bzero(&buffer, sizeof(buffer));
+
+ buffer.d_secpercyl = fd->sc_type->seccyl;
+ 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 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 ENOTTY;
+ }
+
+#ifdef DIAGNOSTIC
+ panic("fdioctl: impossible");
+#endif
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-16 16:30:37 +0000