/* $NetBSD: fd.c,v 1.2 1995/02/22 21:37:15 pk Exp $ */ /*- * Copyright (c) 1993, 1994, 1995 Charles Hannum. * Copyright (c) 1995 Paul Kranenburg. * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define FDUNIT(dev) (minor(dev) / 8) #define FDTYPE(dev) (minor(dev) % 8) #define b_cylin b_resid #define FD_DEBUG #ifdef FD_DEBUG int fdc_debug = 0; #endif 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 dkdevice sc_dk; /* boilerplate */ struct intrhand sc_sih; struct intrhand sc_hih; caddr_t sc_reg; struct fd_softc *sc_fd[4]; /* pointers to children */ TAILQ_HEAD(drivehead, fd_softc) sc_drives; enum fdc_state sc_state; int sc_flags; #define FDC_82077 0x01 #define FDC_NEEDHEADSETTLE 0x02 #define FDC_EIS 0x04 int sc_errors; /* number of retries so far */ int sc_cfg; /* current configuration */ struct fdcio sc_io; #define sc_reg_msr sc_io.fdcio_reg_msr #define sc_reg_fifo sc_io.fdcio_reg_fifo #define sc_reg_dor sc_io.fdcio_reg_dor #define sc_reg_drs sc_io.fdcio_reg_msr #define sc_istate sc_io.fdcio_istate #define sc_data sc_io.fdcio_data #define sc_tc sc_io.fdcio_tc #define sc_nstat sc_io.fdcio_nstat #define sc_status sc_io.fdcio_status }; #ifndef FDC_C_HANDLER extern struct fdcio *fdciop; #endif /* controller driver configuration */ int fdcmatch __P((struct device *, void *, void *)); void fdcattach __P((struct device *, struct device *, void *)); struct cfdriver fdccd = { NULL, "fdc", fdcmatch, 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 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 fdmatch __P((struct device *, void *, void *)); void fdattach __P((struct device *, struct device *, void *)); struct cfdriver fdcd = { NULL, "fd", fdmatch, 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((struct fdc_softc *fdc, 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)); #ifdef FDC_C_HANDLER int fdchwintr __P((struct fdc_softc *)); #else void fdchwintr __P((void)); #endif int fdcswintr __P((struct fdc_softc *)); void fdcretry __P((struct fdc_softc *fdc)); void fdfinish __P((struct fd_softc *fd, struct buf *bp)); #if PIL_FDSOFT == 4 #define IE_FDSOFT IE_L4 #else #error 4 #endif int fdcmatch(parent, match, aux) struct device *parent; void *match, *aux; { struct cfdata *cf = match; register struct confargs *ca = aux; register struct romaux *ra = &ca->ca_ra; /* Sun PROMs call the controller an "fd" */ if (strcmp("fd", ra->ra_name)) return (0); if (ca->ca_bustype == BUS_MAIN) return (1); return (0); } /* * 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; } static void fdconf(fdc) struct fdc_softc *fdc; { int vroom; if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10) return; /* * dumpreg[7] seems to be a motor-off timeout; set it to whatever * the PROM thinks is appropriate. */ if ((vroom = fdc->sc_status[7]) == 0) vroom = 0x64; /* Configure controller to use FIFO and Implied Seek */ out_fdc(fdc, NE7CMD_CFG); out_fdc(fdc, vroom); out_fdc(fdc, fdc->sc_cfg); out_fdc(fdc, 0); /* PRETRK */ /* No result phase */ } void fdcattach(parent, self, aux) struct device *parent, *self; void *aux; { register struct confargs *ca = aux; struct fdc_softc *fdc = (void *)self; struct fdc_attach_args fa; int n, pri; if (ca->ca_ra.ra_vaddr) fdc->sc_reg = (caddr_t)ca->ca_ra.ra_vaddr; else fdc->sc_reg = (caddr_t)mapiodev(ca->ca_ra.ra_paddr, ca->ca_ra.ra_len, ca->ca_bustype); if (cputyp == CPU_SUN4M) { fdc->sc_reg_msr = &((struct fdreg_sun4m *)fdc->sc_reg)->fd_msr; fdc->sc_reg_fifo = &((struct fdreg_sun4m *)fdc->sc_reg)->fd_fifo; fdc->sc_reg_dor = &((struct fdreg_sun4m *)fdc->sc_reg)->fd_dor; } else { fdc->sc_reg_msr = &((struct fdreg_sun4c *)fdc->sc_reg)->fd_msr; fdc->sc_reg_fifo = &((struct fdreg_sun4c *)fdc->sc_reg)->fd_fifo; } fdc->sc_state = DEVIDLE; fdc->sc_istate = ISTATE_IDLE; fdc->sc_flags |= FDC_EIS; TAILQ_INIT(&fdc->sc_drives); pri = ca->ca_ra.ra_intr[0].int_pri; #ifdef FDC_C_HANDLER fdc->sc_hih.ih_fun = (void *)fdchwintr; fdc->sc_hih.ih_arg = fdc; intr_establish(pri, &fdc->sc_hih); #else fdciop = &fdc->sc_io; intr_fasttrap(pri, fdchwintr); #endif fdc->sc_sih.ih_fun = (void *)fdcswintr; fdc->sc_sih.ih_arg = fdc; intr_establish(PIL_FDSOFT, &fdc->sc_sih); if (out_fdc(fdc, NE7CMD_VERSION)) return; n = fdcresult(fdc); if (n == 1 && fdc->sc_status[0] == 0x90) { fdc->sc_flags |= FDC_82077; if (cputyp != CPU_SUN4M) printf(" Hmmm.. "); } else { /* Not a 82077 */ if (cputyp != CPU_SUN4C) printf(" Hmmm.. "); } /* * Configure controller; enable FIFO, Implied seek, no POLL mode?. * Note: CFG_EFIFO is active-low, initial threshold value: 0 */ fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(0 & CFG_THRHLD_MASK); fdconf(fdc); if (fdc->sc_flags & FDC_82077) { /* Lock configuration across soft resets. */ out_fdc(fdc, NE7CMD_LOCK | CFG_LOCK); if (fdcresult(fdc) != 1) printf(" CFGLOCK: unexpected response"); } printf(" pri %d, softpri %d: chip %s\n", pri, PIL_FDSOFT, (fdc->sc_flags & FDC_82077)?"82077":"82072"); /* 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); } } int fdmatch(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 n; 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 { if (drive > 0) /* XXX - drive 0 always answers */ return 0; 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; fdcresult(fdc); if (n == 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; fd->sc_dk.dk_driver = &fddkdriver; #if 0 /* XXX Need to do some more fiddling with sc_dk. */ /* XXX sparc's dk_establish is bogus */ dk_establish(&fd->sc_dk, &fd->sc_dk.dk_dev); #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 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_dk.dk_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_dk.dk_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_dk.dk_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, 5 * hz); fdc->sc_state = DEVIDLE; } void fd_set_motor(fdc, reset) struct fdc_softc *fdc; int reset; { struct fd_softc *fd; u_char status; int n; if (fdc->sc_flags & FDC_82077) { 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); *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); } delay(10); if (reset) { *fdc->sc_reg_drs = DRS_RESET; delay(10); *fdc->sc_reg_drs = 0; #ifdef FD_DEBUG if (fdc_debug) printf("fdc reset\n"); #endif fdconf(fdc); } } } 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_dk.dk_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_dk.dk_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) 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) 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) 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 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(" (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(" 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_dk.dk_dev, 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, trac, sec, i, s, nblks; struct fd_type *type; loop: if (fdc->sc_istate != ISTATE_IDLE) { /* Trouble... */ printf("fdc: spurious interrupt: istate=%d\n", fdc->sc_istate); fdc->sc_istate = ISTATE_IDLE; goto doreset; } /* 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, 0); 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, 0); /* 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; 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 */ /* 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: /* 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_dk.dk_dev, 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); if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) { #ifdef FD_DEBUG if (fdc_debug) { fdcstatus(&fd->sc_dk.dk_dev, 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 (st1 & ST1_OVERRUN) { /* Try a higher threshold */ int thr = fdc->sc_cfg & CFG_THRHLD_MASK; fdc->sc_cfg &= ~CFG_THRHLD_MASK; if (thr < 15) thr++; fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); #ifdef FD_DEBUG if (fdc_debug) printf("fdc: %d -> threshold\n", thr); #endif fdconf(fdc); } 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; } 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, 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(fdc, NE7CMD_SENSEI); (void) fdcresult(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_dk.dk_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_dk.dk_dev, 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; switch (fdc->sc_errors) { case 0: /* try again */ fdc->sc_state = (fdc->sc_flags & FDC_EIS) ? DOIO : 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() { /* Not implemented. */ return EINVAL; } 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; case FDIOCEJECT: auxregbisc(AUXIO_FDS, AUXIO_FEJ); delay(10); auxregbisc(AUXIO_FEJ, AUXIO_FDS); return 0; #ifdef DEBUG case _IO('f', 100): { int i; struct fdc_softc *fdc = (struct fdc_softc *) fd->sc_dk.dk_dev.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_dk.dk_dev.dv_parent)->sc_cfg &= ~CFG_THRHLD_MASK; ((struct fdc_softc *)fd->sc_dk.dk_dev.dv_parent)->sc_cfg |= (*(int *)addr & CFG_THRHLD_MASK); fdconf(fd->sc_dk.dk_dev.dv_parent); return 0; case _IO('f', 102): { int i; struct fdc_softc *fdc = (struct fdc_softc *) fd->sc_dk.dk_dev.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 }