diff options
Diffstat (limited to 'sys/isa/fd.c')
-rw-r--r-- | sys/isa/fd.c | 903 |
1 files changed, 903 insertions, 0 deletions
diff --git a/sys/isa/fd.c b/sys/isa/fd.c new file mode 100644 index 0000000..a461e81 --- /dev/null +++ b/sys/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 + |