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-rw-r--r--sys/i386/isa/fd.c903
1 files changed, 903 insertions, 0 deletions
diff --git a/sys/i386/isa/fd.c b/sys/i386/isa/fd.c
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+++ b/sys/i386/isa/fd.c
@@ -0,0 +1,903 @@
+/*#define DEBUG 1*/
+/*-
+ * 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
+ *
+ * PATCHES MAGIC LEVEL PATCH THAT GOT US HERE
+ * -------------------- ----- ----------------------
+ * CURRENT PATCH LEVEL: 1 00153
+ * -------------------- ----- ----------------------
+ *
+ * 20 Apr 93 Julian Elischer Heavily re worked, see notes below
+ *
+ * Largely rewritten to handle multiple controllers and drives
+ * By Julian Elischer, Sun Apr 4 16:34:33 WST 1993
+ */
+char rev[] = "$Revision: 1.10 $";
+/*
+ * $Header: /usr/src/sys.386bsd/i386/isa/RCS/fd.c,v 1.10 93/04/13 16:53:29 root Exp $
+ */
+/*
+ * $Log: fd.c,v $
+ * Revision 1.10 93/04/13 16:53:29 root
+ * make sure turning off a drive motor doesn't deselect another
+ * drive active at the time.
+ * Also added a pointer from the fd_data to it's fd_type.
+ *
+ * Revision 1.9 93/04/13 15:31:02 root
+ * make all seeks go through DOSEEK state so are sure of being done right.
+ *
+ * Revision 1.8 93/04/12 21:20:13 root
+ * only check if old fd is the one we are working on if there IS
+ * an old fd pointer. (in fdstate())
+ *
+ * Revision 1.7 93/04/11 17:05:35 root
+ * cleanup timeouts etc.
+ * also fix bug to select teh correct drive when running > 1 drive
+ * at a time.
+ *
+ * Revision 1.6 93/04/05 00:48:45 root
+ * change a timeout and add version to banner message
+ *
+ * Revision 1.5 93/04/04 16:39:08 root
+ * first working version.. some floppy controllers don't seem to
+ * like 2 int. status inquiries in a row.
+ *
+ */
+
+#include "fd.h"
+#if NFD > 0
+
+#include "param.h"
+#include "dkbad.h"
+#include "systm.h"
+#include "conf.h"
+#include "file.h"
+#include "ioctl.h"
+#include "buf.h"
+#include "uio.h"
+#include "i386/isa/isa.h"
+#include "i386/isa/isa_device.h"
+#include "i386/isa/fdreg.h"
+#include "i386/isa/icu.h"
+#include "i386/isa/rtc.h"
+#undef NFD
+#define NFD 2
+
+#define FDUNIT(s) ((s>>3)&1)
+#define FDTYPE(s) ((s)&7)
+
+#define b_cylin b_resid
+#define FDBLK 512
+#define NUMTYPES 4
+
+struct fd_type {
+ int sectrac; /* sectors per track */
+ int secsize; /* size code for sectors */
+ int datalen; /* data len when secsize = 0 */
+ int gap; /* gap len between sectors */
+ int tracks; /* total num of tracks */
+ int size; /* size of disk in sectors */
+ int steptrac; /* steps per cylinder */
+ int trans; /* transfer speed code */
+ int heads; /* number of heads */
+};
+
+struct fd_type fd_types[NUMTYPES] =
+{
+ { 18,2,0xFF,0x1B,80,2880,1,0,2 }, /* 1.44 meg HD 3.5in floppy */
+ { 15,2,0xFF,0x1B,80,2400,1,0,2 }, /* 1.2 meg HD floppy */
+ { 9,2,0xFF,0x23,40,720,2,1,2 }, /* 360k floppy in 1.2meg drive */
+ { 9,2,0xFF,0x2A,40,720,1,1,2 }, /* 360k floppy in DD drive */
+};
+
+#define DRVS_PER_CTLR 2
+/***********************************************************************\
+* Per controller structure. *
+\***********************************************************************/
+struct fdc_data
+{
+ int fdcu; /* our unit number */
+ int baseport;
+ int dmachan;
+ int flags;
+#define FDC_ATTACHED 0x01
+ struct fd_data *fd;
+ int fdu; /* the active drive */
+ struct buf head; /* Head of buf chain */
+ struct buf rhead; /* Raw head of buf chain */
+ int state;
+ int retry;
+ int status[7]; /* copy of the registers */
+}fdc_data[(NFD+1)/DRVS_PER_CTLR];
+
+/***********************************************************************\
+* Per drive structure. *
+* N per controller (presently 2) (DRVS_PER_CTLR) *
+\***********************************************************************/
+struct fd_data {
+ struct fdc_data *fdc;
+ int fdu; /* this unit number */
+ int fdsu; /* this units number on this controller */
+ int type; /* Drive type (HD, DD */
+ struct fd_type *ft; /* pointer to the type descriptor */
+ int flags;
+#define FD_OPEN 0x01 /* it's open */
+#define FD_ACTIVE 0x02 /* it's active */
+#define FD_MOTOR 0x04 /* motor should be on */
+#define FD_MOTOR_WAIT 0x08 /* motor coming up */
+ int skip;
+ int hddrv;
+ int track; /* where we think the head is */
+} fd_data[NFD];
+
+/***********************************************************************\
+* Throughout this file the following conventions will be used: *
+* fd is a pointer to the fd_data struct for the drive in question *
+* fdc is a pointer to the fdc_data struct for the controller *
+* fdu is the floppy drive unit number *
+* fdcu is the floppy controller unit number *
+* fdsu is the floppy drive unit number on that controller. (sub-unit) *
+\***********************************************************************/
+typedef int fdu_t;
+typedef int fdcu_t;
+typedef int fdsu_t;
+typedef struct fd_data *fd_p;
+typedef struct fdc_data *fdc_p;
+
+#define DEVIDLE 0
+#define FINDWORK 1
+#define DOSEEK 2
+#define SEEKCOMPLETE 3
+#define IOCOMPLETE 4
+#define RECALCOMPLETE 5
+#define STARTRECAL 6
+#define RESETCTLR 7
+#define SEEKWAIT 8
+#define RECALWAIT 9
+#define MOTORWAIT 10
+#define IOTIMEDOUT 11
+
+#ifdef DEBUG
+char *fdstates[] =
+{
+"DEVIDLE",
+"FINDWORK",
+"DOSEEK",
+"SEEKCOMPLETE",
+"IOCOMPLETE",
+"RECALCOMPLETE",
+"STARTRECAL",
+"RESETCTLR",
+"SEEKWAIT",
+"RECALWAIT",
+"MOTORWAIT",
+"IOTIMEDOUT"
+};
+
+
+int fd_debug = 1;
+#define TRACE0(arg) if(fd_debug) printf(arg)
+#define TRACE1(arg1,arg2) if(fd_debug) printf(arg1,arg2)
+#else DEBUG
+#define TRACE0(arg)
+#define TRACE1(arg1,arg2)
+#endif DEBUG
+
+extern int hz;
+/* state needed for current transfer */
+
+/****************************************************************************/
+/* autoconfiguration stuff */
+/****************************************************************************/
+int fdprobe(), fdattach(), fd_turnoff();
+
+struct isa_driver fddriver = {
+ fdprobe, fdattach, "fd",
+};
+
+/*
+ * probe for existance of controller
+ */
+fdprobe(dev)
+struct isa_device *dev;
+{
+ fdcu_t fdcu = dev->id_unit;
+ if(fdc_data[fdcu].flags & FDC_ATTACHED)
+ {
+ printf("fdc: same unit (%d) used multiple times\n",fdcu);
+ return 0;
+ }
+
+ fdc_data[fdcu].baseport = dev->id_iobase;
+
+ /* see if it can handle a command */
+ if (out_fdc(fdcu,NE7CMD_SPECIFY) < 0)
+ {
+ return(0);
+ }
+ out_fdc(fdcu,0xDF);
+ out_fdc(fdcu,2);
+ return (IO_FDCSIZE);
+}
+
+/*
+ * wire controller into system, look for floppy units
+ */
+fdattach(dev)
+struct isa_device *dev;
+{
+ unsigned fdt,st0, cyl;
+ int hdr;
+ fdu_t fdu;
+ fdcu_t fdcu = dev->id_unit;
+ fdc_p fdc = fdc_data + fdcu;
+ fd_p fd;
+ int fdsu;
+
+ fdc->fdcu = fdcu;
+ fdc->flags |= FDC_ATTACHED;
+ fdc->dmachan = dev->id_drq;
+ fdc->state = DEVIDLE;
+
+ fdt = rtcin(RTC_FDISKETTE);
+ hdr = 0;
+
+ /* check for each floppy drive */
+ for (fdu = (fdcu * DRVS_PER_CTLR),fdsu = 0;
+ ((fdu < NFD) && (fdsu < DRVS_PER_CTLR));
+ fdu++,fdsu++)
+ {
+ /* is there a unit? */
+ if ((fdt & 0xf0) == RTCFDT_NONE)
+ continue;
+
+#ifdef notyet
+ /* select it */
+ fd_turnon1(fdu);
+ spinwait(1000); /* 1 sec */
+ out_fdc(fdcu,NE7CMD_RECAL); /* Recalibrate Function */
+ out_fdc(fdcu,fdsu);
+ spinwait(1000); /* 1 sec */
+
+ /* anything responding */
+ out_fdc(fdcu,NE7CMD_SENSEI);
+ st0 = in_fdc(fdcu);
+ cyl = in_fdc(fdcu);
+ if (st0 & 0xd0)
+ continue;
+
+#endif
+ fd_data[fdu].track = -2;
+ fd_data[fdu].fdc = fdc;
+ fd_data[fdu].fdsu = fdsu;
+ /* yes, announce it */
+ if (!hdr)
+ printf(" drives ");
+ else
+ printf(", ");
+ printf("%d: ", fdu);
+
+
+ if ((fdt & 0xf0) == RTCFDT_12M) {
+ printf("1.2M");
+ fd_data[fdu].type = 1;
+ fd_data[fdu].ft = fd_types + 1;
+
+ }
+ if ((fdt & 0xf0) == RTCFDT_144M) {
+ printf("1.44M");
+ fd_data[fdu].type = 0;
+ fd_data[fdu].ft = fd_types + 0;
+ }
+
+ fdt <<= 4;
+ fd_turnoff(fdu);
+ hdr = 1;
+ }
+
+ printf(" %s ",rev);
+ /* Set transfer to 500kbps */
+ outb(fdc->baseport+fdctl,0); /*XXX*/
+}
+
+int
+fdsize(dev)
+dev_t dev;
+{
+ return(0);
+}
+
+/****************************************************************************/
+/* fdstrategy */
+/****************************************************************************/
+fdstrategy(bp)
+ register struct buf *bp; /* IO operation to perform */
+{
+ register struct buf *dp,*dp0,*dp1;
+ long nblocks,blknum;
+ int s;
+ fdcu_t fdcu;
+ fdu_t fdu;
+ fdc_p fdc;
+ fd_p fd;
+
+ fdu = FDUNIT(minor(bp->b_dev));
+ fd = &fd_data[fdu];
+ fdc = fd->fdc;
+ fdcu = fdc->fdcu;
+ /*type = FDTYPE(minor(bp->b_dev));*/
+
+ if ((fdu >= NFD) || (bp->b_blkno < 0)) {
+ printf("fdstrat: fdu = %d, blkno = %d, bcount = %d\n",
+ fdu, bp->b_blkno, bp->b_bcount);
+ pg("fd:error in fdstrategy");
+ bp->b_error = EINVAL;
+ bp->b_flags |= B_ERROR;
+ goto bad;
+ }
+ /*
+ * Set up block calculations.
+ */
+ blknum = (unsigned long) bp->b_blkno * DEV_BSIZE/FDBLK;
+ nblocks = fd->ft->size;
+ if (blknum + (bp->b_bcount / FDBLK) > nblocks) {
+ if (blknum == nblocks) {
+ bp->b_resid = bp->b_bcount;
+ } else {
+ bp->b_error = ENOSPC;
+ bp->b_flags |= B_ERROR;
+ }
+ goto bad;
+ }
+ bp->b_cylin = blknum / (fd->ft->sectrac * fd->ft->heads);
+ dp = &(fdc->head);
+ s = splbio();
+ disksort(dp, bp);
+ untimeout(fd_turnoff,fdu); /* a good idea */
+ fdstart(fdcu);
+ splx(s);
+ return;
+
+bad:
+ biodone(bp);
+}
+
+/****************************************************************************/
+/* motor control stuff */
+/* remember to not deselect the drive we're working on */
+/****************************************************************************/
+set_motor(fdcu_t fdcu, fdu_t fdu, int reset)
+{
+ int m0,m1;
+ int selunit;
+ fd_p fd;
+ if(fd = fdc_data[fdcu].fd)/* yes an assign! */
+ {
+ selunit = fd->fdsu;
+ }
+ else
+ {
+ selunit = 0;
+ }
+ m0 = fd_data[fdcu * DRVS_PER_CTLR + 0].flags & FD_MOTOR;
+ m1 = fd_data[fdcu * DRVS_PER_CTLR + 1].flags & FD_MOTOR;
+ outb(fdc_data[fdcu].baseport+fdout,
+ selunit
+ | (reset ? 0 : (FDO_FRST|FDO_FDMAEN))
+ | (m0 ? FDO_MOEN0 : 0)
+ | (m1 ? FDO_MOEN1 : 0));
+ TRACE1("[0x%x->fdout]",(
+ selunit
+ | (reset ? 0 : (FDO_FRST|FDO_FDMAEN))
+ | (m0 ? FDO_MOEN0 : 0)
+ | (m1 ? FDO_MOEN1 : 0)));
+}
+
+fd_turnoff(fdu_t fdu)
+{
+ fd_p fd = fd_data + fdu;
+ fd->flags &= ~FD_MOTOR;
+ set_motor(fd->fdc->fdcu,fd->fdsu,0);
+}
+
+fd_motor_on(fdu_t fdu)
+{
+ fd_p fd = fd_data + fdu;
+ fd->flags &= ~FD_MOTOR_WAIT;
+ if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
+ {
+ fd_pseudointr(fd->fdc->fdcu);
+ }
+}
+
+fd_turnon(fdu_t fdu)
+{
+ fd_p fd = fd_data + fdu;
+ if(!(fd->flags & FD_MOTOR))
+ {
+ fd_turnon1(fdu);
+ fd->flags |= FD_MOTOR_WAIT;
+ timeout(fd_motor_on,fdu,hz); /* in 1 sec its ok */
+ }
+}
+
+fd_turnon1(fdu_t fdu)
+{
+ fd_p fd = fd_data + fdu;
+ fd->flags |= FD_MOTOR;
+ set_motor(fd->fdc->fdcu,fd->fdsu,0);
+}
+
+/****************************************************************************/
+/* fdc in/out */
+/****************************************************************************/
+int
+in_fdc(fdcu_t fdcu)
+{
+ int baseport = fdc_data[fdcu].baseport;
+ int i, j = 100000;
+ while ((i = inb(baseport+fdsts) & (NE7_DIO|NE7_RQM))
+ != (NE7_DIO|NE7_RQM) && j-- > 0)
+ if (i == NE7_RQM) return -1;
+ if (j <= 0)
+ return(-1);
+#ifdef DEBUG
+ i = inb(baseport+fddata);
+ TRACE1("[fddata->0x%x]",(unsigned char)i);
+ return(i);
+#else
+ return inb(baseport+fddata);
+#endif
+}
+
+out_fdc(fdcu_t fdcu,int x)
+{
+ int baseport = fdc_data[fdcu].baseport;
+ int i = 100000;
+
+ while ((inb(baseport+fdsts) & NE7_DIO) && i-- > 0);
+ while ((inb(baseport+fdsts) & NE7_RQM) == 0 && i-- > 0);
+ if (i <= 0) return (-1);
+ outb(baseport+fddata,x);
+ TRACE1("[0x%x->fddata]",x);
+ return (0);
+}
+
+static fdopenf;
+/****************************************************************************/
+/* fdopen/fdclose */
+/****************************************************************************/
+Fdopen(dev, flags)
+ dev_t dev;
+ int flags;
+{
+ fdu_t fdu = FDUNIT(minor(dev));
+ /*int type = FDTYPE(minor(dev));*/
+ int s;
+
+ /* check bounds */
+ if (fdu >= NFD) return(ENXIO);
+ /*if (type >= NUMTYPES) return(ENXIO);*/
+ fd_data[fdu].flags |= FD_OPEN;
+
+ return 0;
+}
+
+fdclose(dev, flags)
+ dev_t dev;
+{
+ fdu_t fdu = FDUNIT(minor(dev));
+ fd_data[fdu].flags &= ~FD_OPEN;
+ return(0);
+}
+
+
+/***************************************************************\
+* fdstart *
+* We have just queued something.. if the controller is not busy *
+* then simulate the case where it has just finished a command *
+* So that it (the interrupt routine) looks on the queue for more*
+* work to do and picks up what we just added. *
+* If the controller is already busy, we need do nothing, as it *
+* will pick up our work when the present work completes *
+\***************************************************************/
+fdstart(fdcu_t fdcu)
+{
+ register struct buf *dp,*bp;
+ int s;
+ fdu_t fdu;
+
+ s = splbio();
+ if(fdc_data[fdcu].state == DEVIDLE)
+ {
+ fdintr(fdcu);
+ }
+ splx(s);
+}
+
+fd_timeout(fdcu_t fdcu)
+{
+ fdu_t fdu = fdc_data[fdcu].fdu;
+ int st0, st3, cyl;
+ struct buf *dp,*bp;
+
+ dp = &fdc_data[fdcu].head;
+ bp = dp->b_actf;
+
+ out_fdc(fdcu,NE7CMD_SENSED);
+ out_fdc(fdcu,fd_data[fdu].hddrv);
+ st3 = in_fdc(fdcu);
+
+ out_fdc(fdcu,NE7CMD_SENSEI);
+ st0 = in_fdc(fdcu);
+ cyl = in_fdc(fdcu);
+ printf("fd%d: Operation timeout ST0 %b cyl %d ST3 %b\n",
+ fdu,
+ st0,
+ NE7_ST0BITS,
+ cyl,
+ st3,
+ NE7_ST3BITS);
+
+ if (bp)
+ {
+ retrier(fdcu);
+ fdc_data[fdcu].status[0] = 0xc0;
+ fdc_data[fdcu].state = IOTIMEDOUT;
+ if( fdc_data[fdcu].retry < 6)
+ fdc_data[fdcu].retry = 6;
+ }
+ else
+ {
+ fdc_data[fdcu].fd = (fd_p) 0;
+ fdc_data[fdcu].fdu = -1;
+ fdc_data[fdcu].state = DEVIDLE;
+ }
+ fd_pseudointr(fdcu);
+}
+
+/* just ensure it has the right spl */
+fd_pseudointr(fdcu_t fdcu)
+{
+ int s;
+ s = splbio();
+ fdintr(fdcu);
+ splx(s);
+}
+
+/***********************************************************************\
+* fdintr *
+* keep calling the state machine until it returns a 0 *
+* ALWAYS called at SPLBIO *
+\***********************************************************************/
+fdintr(fdcu_t fdcu)
+{
+ fdc_p fdc = fdc_data + fdcu;
+ while(fdstate(fdcu, fdc));
+}
+
+/***********************************************************************\
+* The controller state machine. *
+* if it returns a non zero value, it should be called again immediatly *
+\***********************************************************************/
+int fdstate(fdcu_t fdcu, fdc_p fdc)
+{
+ int read,head,trac,sec,i,s,sectrac,cyl,st0;
+ unsigned long blknum;
+ fdu_t fdu = fdc->fdu;
+ fd_p fd;
+ register struct buf *dp,*bp;
+
+ dp = &(fdc->head);
+ bp = dp->b_actf;
+ if(!bp)
+ {
+ /***********************************************\
+ * nothing left for this controller to do *
+ * Force into the IDLE state, *
+ \***********************************************/
+ fdc->state = DEVIDLE;
+ if(fdc->fd)
+ {
+ printf("unexpected valid fd pointer (fdu = %d)\n"
+ ,fdc->fdu);
+ fdc->fd = (fd_p) 0;
+ fdc->fdu = -1;
+ }
+ TRACE1("[fdc%d IDLE]",fdcu);
+ return(0);
+ }
+ fdu = FDUNIT(minor(bp->b_dev));
+ fd = fd_data + fdu;
+ if (fdc->fd && (fd != fdc->fd))
+ {
+ printf("confused fd pointers\n");
+ }
+ read = bp->b_flags & B_READ;
+ TRACE1("fd%d",fdu);
+ TRACE1("[%s]",fdstates[fdc->state]);
+ TRACE1("(0x%x)",fd->flags);
+ untimeout(fd_turnoff, fdu);
+ timeout(fd_turnoff,fdu,4 * hz);
+ switch (fdc->state)
+ {
+ case DEVIDLE:
+ case FINDWORK: /* we have found new work */
+ fdc->retry = 0;
+ fd->skip = 0;
+ fdc->fd = fd;
+ fdc->fdu = fdu;
+ /*******************************************************\
+ * If the next drive has a motor startup pending, then *
+ * it will start up in it's own good time *
+ \*******************************************************/
+ if(fd->flags & FD_MOTOR_WAIT)
+ {
+ fdc->state = MOTORWAIT;
+ return(0); /* come back later */
+ }
+ /*******************************************************\
+ * Maybe if it's not starting, it SHOULD be starting *
+ \*******************************************************/
+ if (!(fd->flags & FD_MOTOR))
+ {
+ fdc->state = MOTORWAIT;
+ fd_turnon(fdu);
+ return(0);
+ }
+ else /* at least make sure we are selected */
+ {
+ set_motor(fdcu,fd->fdsu,0);
+ }
+ fdc->state = DOSEEK;
+ break;
+ case DOSEEK:
+ if (bp->b_cylin == fd->track)
+ {
+ fdc->state = SEEKCOMPLETE;
+ break;
+ }
+ out_fdc(fdcu,NE7CMD_SEEK); /* Seek function */
+ out_fdc(fdcu,fd->fdsu); /* Drive number */
+ out_fdc(fdcu,bp->b_cylin * fd->ft->steptrac);
+ fd->track = -2;
+ fdc->state = SEEKWAIT;
+ return(0); /* will return later */
+ case SEEKWAIT:
+ /* allow heads to settle */
+ timeout(fd_pseudointr,fdcu,hz/50);
+ fdc->state = SEEKCOMPLETE;
+ return(0); /* will return later */
+ break;
+
+ case SEEKCOMPLETE : /* SEEK DONE, START DMA */
+ /* Make sure seek really happened*/
+ if(fd->track == -2)
+ {
+ int descyl = bp->b_cylin * fd->ft->steptrac;
+ out_fdc(fdcu,NE7CMD_SENSEI);
+ i = in_fdc(fdcu);
+ cyl = in_fdc(fdcu);
+ if (cyl != descyl)
+ {
+ printf("fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", fdu,
+ descyl, cyl, i, NE7_ST0BITS);
+ return(retrier(fdcu));
+ }
+ }
+
+ fd->track = bp->b_cylin;
+ isa_dmastart(bp->b_flags, bp->b_un.b_addr+fd->skip,
+ FDBLK, fdc->dmachan);
+ blknum = (unsigned long)bp->b_blkno*DEV_BSIZE/FDBLK
+ + fd->skip/FDBLK;
+ sectrac = fd->ft->sectrac;
+ sec = blknum % (sectrac * fd->ft->heads);
+ head = sec / sectrac;
+ sec = sec % sectrac + 1;
+/*XXX*/ fd->hddrv = ((head&1)<<2)+fdu;
+
+ if (read)
+ {
+ out_fdc(fdcu,NE7CMD_READ); /* READ */
+ }
+ else
+ {
+ out_fdc(fdcu,NE7CMD_WRITE); /* WRITE */
+ }
+ out_fdc(fdcu,head << 2 | fdu); /* head & unit */
+ out_fdc(fdcu,fd->track); /* track */
+ out_fdc(fdcu,head);
+ out_fdc(fdcu,sec); /* sector XXX +1? */
+ out_fdc(fdcu,fd->ft->secsize); /* sector size */
+ out_fdc(fdcu,sectrac); /* sectors/track */
+ out_fdc(fdcu,fd->ft->gap); /* gap size */
+ out_fdc(fdcu,fd->ft->datalen); /* data length */
+ fdc->state = IOCOMPLETE;
+ timeout(fd_timeout,fdcu,2 * hz);
+ return(0); /* will return later */
+ case IOCOMPLETE: /* IO DONE, post-analyze */
+ untimeout(fd_timeout,fdcu);
+ for(i=0;i<7;i++)
+ {
+ fdc->status[i] = in_fdc(fdcu);
+ }
+ case IOTIMEDOUT: /*XXX*/
+ isa_dmadone(bp->b_flags, bp->b_un.b_addr+fd->skip,
+ FDBLK, fdc->dmachan);
+ if (fdc->status[0]&0xF8)
+ {
+ return(retrier(fdcu));
+ }
+ /* All OK */
+ fd->skip += FDBLK;
+ if (fd->skip < bp->b_bcount)
+ {
+ /* set up next transfer */
+ blknum = (unsigned long)bp->b_blkno*DEV_BSIZE/FDBLK
+ + fd->skip/FDBLK;
+ bp->b_cylin = (blknum / (fd->ft->sectrac * fd->ft->heads));
+ fdc->state = DOSEEK;
+ }
+ else
+ {
+ /* ALL DONE */
+ fd->skip = 0;
+ bp->b_resid = 0;
+ dp->b_actf = bp->av_forw;
+ biodone(bp);
+ fdc->fd = (fd_p) 0;
+ fdc->fdu = -1;
+ fdc->state = FINDWORK;
+ }
+ return(1);
+ case RESETCTLR:
+ /* Try a reset, keep motor on */
+ set_motor(fdcu,fd->fdsu,1);
+ DELAY(100);
+ set_motor(fdcu,fd->fdsu,0);
+ outb(fdc->baseport+fdctl,fd->ft->trans);
+ TRACE1("[0x%x->fdctl]",fd->ft->trans);
+ fdc->retry++;
+ fdc->state = STARTRECAL;
+ break;
+ case STARTRECAL:
+ out_fdc(fdcu,NE7CMD_SPECIFY); /* specify command */
+ out_fdc(fdcu,0xDF);
+ out_fdc(fdcu,2);
+ out_fdc(fdcu,NE7CMD_RECAL); /* Recalibrate Function */
+ out_fdc(fdcu,fdu);
+ fdc->state = RECALWAIT;
+ return(0); /* will return later */
+ case RECALWAIT:
+ /* allow heads to settle */
+ timeout(fd_pseudointr,fdcu,hz/30);
+ fdc->state = RECALCOMPLETE;
+ return(0); /* will return later */
+ case RECALCOMPLETE:
+ out_fdc(fdcu,NE7CMD_SENSEI);
+ st0 = in_fdc(fdcu);
+ cyl = in_fdc(fdcu);
+ if (cyl != 0)
+ {
+ printf("fd%d: recal failed ST0 %b cyl %d\n", fdu,
+ st0, NE7_ST0BITS, cyl);
+ return(retrier(fdcu));
+ }
+ fd->track = 0;
+ /* Seek (probably) necessary */
+ fdc->state = DOSEEK;
+ return(1); /* will return immediatly */
+ case MOTORWAIT:
+ if(fd->flags & FD_MOTOR_WAIT)
+ {
+ return(0); /* time's not up yet */
+ }
+ fdc->state = DOSEEK;
+ return(1); /* will return immediatly */
+ default:
+ printf("Unexpected FD int->");
+ out_fdc(fdcu,NE7CMD_SENSEI);
+ st0 = in_fdc(fdcu);
+ cyl = in_fdc(fdcu);
+ printf("ST0 = %lx, PCN = %lx\n",i,sec);
+ out_fdc(fdcu,0x4A);
+ out_fdc(fdcu,fd->fdsu);
+ for(i=0;i<7;i++) {
+ fdc->status[i] = in_fdc(fdcu);
+ }
+ printf("intr status :%lx %lx %lx %lx %lx %lx %lx ",
+ fdc->status[0],
+ fdc->status[1],
+ fdc->status[2],
+ fdc->status[3],
+ fdc->status[4],
+ fdc->status[5],
+ fdc->status[6] );
+ return(0);
+ }
+ return(1); /* Come back immediatly to new state */
+}
+
+retrier(fdcu_t fdcu)
+{
+ fdc_p fdc = fdc_data + fdcu;
+ register struct buf *dp,*bp;
+
+ dp = &(fdc->head);
+ bp = dp->b_actf;
+
+ switch(fdc->retry)
+ {
+ case 0: case 1: case 2:
+ fdc->state = SEEKCOMPLETE;
+ break;
+ case 3: case 4: case 5:
+ fdc->state = STARTRECAL;
+ break;
+ case 6:
+ fdc->state = RESETCTLR;
+ break;
+ case 7:
+ break;
+ default:
+ {
+ printf("fd%d: hard error (ST0 %b ",
+ fdc->fdu, fdc->status[0], NE7_ST0BITS);
+ printf(" ST1 %b ", fdc->status[1], NE7_ST1BITS);
+ printf(" ST2 %b ", fdc->status[2], NE7_ST2BITS);
+ printf(" ST3 %b ", fdc->status[3], NE7_ST3BITS);
+ printf("cyl %d hd %d sec %d)\n",
+ fdc->status[4], fdc->status[5], fdc->status[6]);
+ }
+ bp->b_flags |= B_ERROR;
+ bp->b_error = EIO;
+ bp->b_resid = bp->b_bcount - fdc->fd->skip;
+ dp->b_actf = bp->av_forw;
+ fdc->fd->skip = 0;
+ biodone(bp);
+ fdc->state = FINDWORK;
+ fdc->fd = (fd_p) 0;
+ fdc->fdu = -1;
+ return(1);
+ }
+ fdc->retry++;
+ return(1);
+}
+
+#endif
+
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