/*- * 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. * * Portions Copyright (c) 1993, 1994 by * jc@irbs.UUCP (John Capo) * vak@zebub.msk.su (Serge Vakulenko) * ache@astral.msk.su (Andrew A. Chernov) * joerg_wunsch@uriah.sax.de (Joerg Wunsch) * * 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. * * from: @(#)fd.c 7.4 (Berkeley) 5/25/91 * $Id: fd.c,v 1.31 1994/09/17 18:08:36 joerg Exp $ * */ #include "ft.h" #if NFT < 1 #undef NFDC #endif #include "fd.h" #if NFDC > 0 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if NFT > 0 #include #include #endif #define RAW_PART 2 #define b_cylin b_resid /* misuse a flag to identify format operation */ #define B_FORMAT B_XXX /* * this biotab field doubles as a field for the physical unit number * on the controller */ #define id_physid id_scsiid #define NUMTYPES 14 #define NUMDENS (NUMTYPES - 6) /* These defines (-1) must match index for fd_types */ #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */ #define NO_TYPE 0 /* must match NO_TYPE in ft.c */ #define FD_1720 1 #define FD_1480 2 #define FD_1440 3 #define FD_1200 4 #define FD_820 5 #define FD_800 6 #define FD_720 7 #define FD_360 8 #define FD_1480in5_25 9 #define FD_1440in5_25 10 #define FD_820in5_25 11 #define FD_800in5_25 12 #define FD_720in5_25 13 #define FD_360in5_25 14 struct fd_type fd_types[NUMTYPES] = { { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */ { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */ { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */ { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */ { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */ { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */ { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */ { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */ { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */ { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */ { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */ { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */ { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */ { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */ }; #define DRVS_PER_CTLR 2 /* 2 floppies */ /***********************************************************************\ * Per controller structure. * \***********************************************************************/ struct fdc_data fdc_data[NFDC]; /***********************************************************************\ * Per drive structure. * * N per controller (DRVS_PER_CTLR) * \***********************************************************************/ struct fd_data { struct fdc_data *fdc; /* pointer to controller structure */ int fdsu; /* this units number on this controller */ int type; /* Drive type (FD_1440...) */ 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 */ int options; /* user configurable options, see ioctl_fd.h */ } 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) * \***********************************************************************/ #if NFT > 0 int ftopen(dev_t, int); int ftintr(ftu_t ftu); int ftclose(dev_t, int); void ftstrategy(struct buf *); int ftioctl(dev_t, int, caddr_t, int, struct proc *); int ftdump(dev_t); int ftsize(dev_t); int ftattach(struct isa_device *, struct isa_device *); #endif /* autoconfig functions */ static int fdprobe(struct isa_device *); static int fdattach(struct isa_device *); /* exported functions */ int fdsize (dev_t); void fdintr(fdcu_t); int Fdopen(dev_t, int); int fdclose(dev_t, int); void fdstrategy(struct buf *); int fdioctl(dev_t, int, caddr_t, int, struct proc *); /* needed for ft driver, thus exported */ int in_fdc(fdcu_t); int out_fdc(fdcu_t, int); /* internal functions */ static void set_motor(fdcu_t, int, int); # define TURNON 1 # define TURNOFF 0 static timeout_t fd_turnoff; static timeout_t fd_motor_on; static void fd_turnon(fdu_t); static void fdc_reset(fdc_p); static void fdstart(fdcu_t); static timeout_t fd_timeout; static timeout_t fd_pseudointr; static int fdstate(fdcu_t, fdc_p); static int retrier(fdcu_t); static int fdformat(dev_t, struct fd_formb *, struct proc *); #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" }; /* CAUTION: fd_debug causes huge amounts of logging output */ int fd_debug = 0; #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 */ /****************************************************************************/ /* autoconfiguration stuff */ /****************************************************************************/ struct isa_driver fdcdriver = { fdprobe, fdattach, "fdc", }; /* * probe for existance of controller */ static int 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; /* First - lets reset the floppy controller */ outb(dev->id_iobase+FDOUT, 0); DELAY(100); outb(dev->id_iobase+FDOUT, FDO_FRST); /* see if it can handle a command */ if (out_fdc(fdcu, NE7CMD_SPECIFY) < 0) { return(0); } out_fdc(fdcu, NE7_SPEC_1(3, 240)); out_fdc(fdcu, NE7_SPEC_2(2, 0)); return (IO_FDCSIZE); } /* * wire controller into system, look for floppy units */ static int fdattach(dev) struct isa_device *dev; { unsigned fdt; fdu_t fdu; fdcu_t fdcu = dev->id_unit; fdc_p fdc = fdc_data + fdcu; fd_p fd; int fdsu, st0, i; struct isa_device *fdup; fdc->fdcu = fdcu; fdc->flags |= FDC_ATTACHED; fdc->dmachan = dev->id_drq; fdc->state = DEVIDLE; /* reset controller, turn motor off, clear fdout mirror reg */ outb(fdc->baseport + FDOUT, ((fdc->fdout = 0))); printf("fdc%d:", fdcu); /* check for each floppy drive */ for (fdup = isa_biotab_fdc; fdup->id_driver != 0; fdup++) { if (fdup->id_iobase != dev->id_iobase) continue; fdu = fdup->id_unit; fd = &fd_data[fdu]; if (fdu >= (NFD+NFT)) continue; fdsu = fdup->id_physid; /* look up what bios thinks we have */ switch (fdu) { case 0: fdt = (rtcin(RTC_FDISKETTE) & 0xf0); break; case 1: fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0); break; default: fdt = RTCFDT_NONE; break; } /* is there a unit? */ if ((fdt == RTCFDT_NONE) #if NFT > 0 || (fdsu >= DRVS_PER_CTLR)) { #else ) { fd->type = NO_TYPE; #endif #if NFT > 0 /* If BIOS says no floppy, or > 2nd device */ /* Probe for and attach a floppy tape. */ if (ftattach(dev, fdup)) continue; if (fdsu < DRVS_PER_CTLR) fd->type = NO_TYPE; #endif continue; } /* select it */ set_motor(fdcu, fdsu, TURNON); DELAY(1000000); /* 1 sec */ out_fdc(fdcu, NE7CMD_SENSED); out_fdc(fdcu, fdsu); if(in_fdc(fdcu) & NE7_ST3_T0) { /* if at track 0, first seek inwards */ out_fdc(fdcu, NE7CMD_SEEK); /* seek some steps... */ out_fdc(fdcu, fdsu); out_fdc(fdcu, 10); DELAY(300000); /* ...wait a moment... */ out_fdc(fdcu, NE7CMD_SENSEI); /* make ctrlr happy */ (void)in_fdc(fdcu); (void)in_fdc(fdcu); } for(i = 0; i < 2; i++) { /* * we must recalibrate twice, just in case the * heads have been beyond cylinder 76, since most * FDCs still barf when attempting to recalibrate * more than 77 steps */ out_fdc(fdcu, NE7CMD_RECAL); /* go back to 0 */ out_fdc(fdcu, fdsu); /* a second being enough for full stroke seek */ DELAY(i == 0? 1000000: 300000); /* anything responding? */ out_fdc(fdcu, NE7CMD_SENSEI); st0 = in_fdc(fdcu); (void)in_fdc(fdcu); if ((st0 & NE7_ST0_EC) == 0) break; /* already probed succesfully */ } set_motor(fdcu, fdsu, TURNOFF); if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */ continue; fd->track = -2; fd->fdc = fdc; fd->fdsu = fdsu; fd->options = 0; printf(" [%d: fd%d: ", fdsu, fdu); switch (fdt) { case RTCFDT_12M: printf("1.2MB 5.25in]"); fd->type = FD_1200; break; case RTCFDT_144M: printf("1.44MB 3.5in]"); fd->type = FD_1440; break; case RTCFDT_360K: printf("360KB 5.25in]"); fd->type = FD_360; break; case RTCFDT_720K: printf("720KB 3.5in]"); fd->type = FD_720; break; default: printf("unknown]"); fd->type = NO_TYPE; break; } } printf("\n"); return (1); } int fdsize(dev) dev_t dev; { return(0); } /****************************************************************************/ /* motor control stuff */ /* remember to not deselect the drive we're working on */ /****************************************************************************/ static void set_motor(fdcu, fdsu, turnon) fdcu_t fdcu; int fdsu; int turnon; { int fdout = fdc_data[fdcu].fdout; int needspecify = 0; if(turnon) { fdout &= ~FDO_FDSEL; fdout |= (FDO_MOEN0 << fdsu) + fdsu; } else fdout &= ~(FDO_MOEN0 << fdsu); if(!turnon && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0) /* gonna turn off the last drive, put FDC to bed */ fdout &= ~ (FDO_FRST|FDO_FDMAEN); else { /* make sure controller is selected and specified */ if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0) needspecify = 1; fdout |= (FDO_FRST|FDO_FDMAEN); } outb(fdc_data[fdcu].baseport+FDOUT, fdout); fdc_data[fdcu].fdout = fdout; TRACE1("[0x%x->FDOUT]", fdout); if(needspecify) { out_fdc(fdcu, NE7CMD_SPECIFY); out_fdc(fdcu, NE7_SPEC_1(3, 240)); out_fdc(fdcu, NE7_SPEC_2(2, 0)); } } /* ARGSUSED */ static void fd_turnoff(void *arg1) { fdu_t fdu = (fdu_t)arg1; int s; fd_p fd = fd_data + fdu; s = splbio(); fd->flags &= ~FD_MOTOR; set_motor(fd->fdc->fdcu, fd->fdsu, TURNOFF); splx(s); } /* ARGSUSED */ static void fd_motor_on(void *arg1) { fdu_t fdu = (fdu_t)arg1; int s; fd_p fd = fd_data + fdu; s = splbio(); fd->flags &= ~FD_MOTOR_WAIT; if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) { fdintr(fd->fdc->fdcu); } splx(s); } static void fd_turnon(fdu) fdu_t fdu; { fd_p fd = fd_data + fdu; if(!(fd->flags & FD_MOTOR)) { fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); set_motor(fd->fdc->fdcu, fd->fdsu, TURNON); timeout(fd_motor_on, (caddr_t)fdu, hz); /* in 1 sec its ok */ } } static void fdc_reset(fdc) fdc_p fdc; { fdcu_t fdcu = fdc->fdcu; /* Try a reset, keep motor on */ outb(fdc->baseport + FDOUT, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); DELAY(100); /* enable FDC, but defer interrupts a moment */ outb(fdc->baseport + FDOUT, fdc->fdout & ~FDO_FDMAEN); TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); DELAY(100); outb(fdc->baseport + FDOUT, fdc->fdout); TRACE1("[0x%x->FDOUT]", fdc->fdout); out_fdc(fdcu, NE7CMD_SPECIFY); out_fdc(fdcu, NE7_SPEC_1(3, 240)); out_fdc(fdcu, NE7_SPEC_2(2, 0)); } /****************************************************************************/ /* fdc in/out */ /****************************************************************************/ int in_fdc(fdcu) 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 } int out_fdc(fdcu, x) fdcu_t fdcu; int x; { int baseport = fdc_data[fdcu].baseport; int i; /* Check that the direction bit is set */ i = 100000; while ((inb(baseport+FDSTS) & NE7_DIO) && i-- > 0); if (i <= 0) return (-1); /* Floppy timed out */ /* Check that the floppy controller is ready for a command */ i = 100000; while ((inb(baseport+FDSTS) & NE7_RQM) == 0 && i-- > 0); if (i <= 0) return (-1); /* Floppy timed out */ /* Send the command and return */ outb(baseport+FDDATA, x); TRACE1("[0x%x->FDDATA]", x); return (0); } /****************************************************************************/ /* fdopen/fdclose */ /****************************************************************************/ int Fdopen(dev, flags) dev_t dev; int flags; { fdu_t fdu = FDUNIT(minor(dev)); int type = FDTYPE(minor(dev)); fdc_p fdc; #if NFT > 0 /* check for a tape open */ if (type & F_TAPE_TYPE) return(ftopen(dev, flags)); #endif /* check bounds */ if (fdu >= NFD) return(ENXIO); fdc = fd_data[fdu].fdc; if ((fdc == NULL) || (fd_data[fdu].type == NO_TYPE)) return(ENXIO); if (type > NUMDENS) return(ENXIO); if (type == 0) type = fd_data[fdu].type; else { if (type != fd_data[fdu].type) { switch (fd_data[fdu].type) { case FD_360: return(ENXIO); case FD_720: if ( type != FD_820 && type != FD_800 ) return(ENXIO); break; case FD_1200: switch (type) { case FD_1480: type = FD_1480in5_25; break; case FD_1440: type = FD_1440in5_25; break; case FD_820: type = FD_820in5_25; break; case FD_800: type = FD_800in5_25; break; case FD_720: type = FD_720in5_25; break; case FD_360: type = FD_360in5_25; break; default: return(ENXIO); } break; case FD_1440: if ( type != FD_1720 && type != FD_1480 && type != FD_1200 && type != FD_820 && type != FD_800 && type != FD_720 ) return(ENXIO); break; } } } fd_data[fdu].ft = fd_types + type - 1; fd_data[fdu].flags |= FD_OPEN; return 0; } int fdclose(dev, flags) dev_t dev; int flags; { fdu_t fdu = FDUNIT(minor(dev)); #if NFT > 0 int type = FDTYPE(minor(dev)); if (type & F_TAPE_TYPE) return ftclose(dev, flags); #endif fd_data[fdu].flags &= ~FD_OPEN; fd_data[fdu].options &= ~FDOPT_NORETRY; return(0); } /****************************************************************************/ /* fdstrategy */ /****************************************************************************/ void fdstrategy(struct buf *bp) { register struct buf *dp; long nblocks, blknum; int s; fdcu_t fdcu; fdu_t fdu; fdc_p fdc; fd_p fd; size_t fdblk; fdu = FDUNIT(minor(bp->b_dev)); fd = &fd_data[fdu]; fdc = fd->fdc; fdcu = fdc->fdcu; fdblk = 128 << (fd->ft->secsize); #if NFT > 0 if (FDTYPE(minor(bp->b_dev)) & F_TAPE_TYPE) { /* ft tapes do not (yet) support strategy i/o */ bp->b_error = ENXIO; bp->b_flags |= B_ERROR; goto bad; } /* check for controller already busy with tape */ if (fdc->flags & FDC_TAPE_BUSY) { bp->b_error = EBUSY; bp->b_flags |= B_ERROR; goto bad; } #endif if (!(bp->b_flags & B_FORMAT)) { if ((fdu >= NFD) || (bp->b_blkno < 0)) { printf("fdstrat: fdu = %d, blkno = %d, bcount = %d\n", fdu, bp->b_blkno, bp->b_bcount); bp->b_error = EINVAL; bp->b_flags |= B_ERROR; goto bad; } if ((bp->b_bcount % fdblk) != 0) { 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, (caddr_t)fdu); /* a good idea */ fdstart(fdcu); splx(s); return; bad: biodone(bp); } /***************************************************************\ * 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 * \***************************************************************/ static void fdstart(fdcu) fdcu_t fdcu; { int s; s = splbio(); if(fdc_data[fdcu].state == DEVIDLE) { fdintr(fdcu); } splx(s); } /* ARGSUSED */ static void fd_timeout(void *arg1) { fdcu_t fdcu = (fdcu_t)arg1; fdu_t fdu = fdc_data[fdcu].fdu; int baseport = fdc_data[fdcu].baseport; struct buf *dp, *bp; int s; dp = &fdc_data[fdcu].head; bp = dp->b_actf; /* * Due to IBM's brain-dead design, the FDC has a faked ready * signal, hardwired to ready == true. Thus, any command * issued if there's no diskette in the drive will _never_ * complete, and must be aborted by resetting the FDC. * Many thanks, Big Blue! */ s = splbio(); TRACE1("fd%d[fd_timeout()]", fdu); /* See if the controller is still busy (patiently awaiting data) */ if(((inb(baseport + FDSTS)) & (NE7_CB|NE7_RQM)) == NE7_CB) { TRACE1("[FDSTS->0x%x]", inb(baseport + FDSTS)); /* yup, it is; kill it now */ fdc_reset(&fdc_data[fdcu]); printf("fd%d: Operation timeout\n", fdu); } if (bp) { retrier(fdcu); fdc_data[fdcu].status[0] = NE7_ST0_IC_RC; 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; } fdintr(fdcu); splx(s); } /* just ensure it has the right spl */ /* ARGSUSED */ static void fd_pseudointr(void *arg1) { fdcu_t fdcu = (fdcu_t)arg1; int s; s = splbio(); fdintr(fdcu); splx(s); } /***********************************************************************\ * fdintr * * keep calling the state machine until it returns a 0 * * ALWAYS called at SPLBIO * \***********************************************************************/ void fdintr(fdcu_t fdcu) { fdc_p fdc = fdc_data + fdcu; #if NFT > 0 fdu_t fdu = fdc->fdu; if (fdc->flags & FDC_TAPE_BUSY) (ftintr(fdu)); else #endif while(fdstate(fdcu, fdc)) ; } /***********************************************************************\ * The controller state machine. * * if it returns a non zero value, it should be called again immediatly * \***********************************************************************/ static int fdstate(fdcu, fdc) fdcu_t fdcu; fdc_p fdc; { int read, format, head, sec = 0, i = 0, sectrac, st0, cyl, st3; unsigned long blknum; fdu_t fdu = fdc->fdu; fd_p fd; register struct buf *dp, *bp; struct fd_formb *finfo = NULL; size_t fdblk; 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; fdblk = 128 << fd->ft->secsize; if (fdc->fd && (fd != fdc->fd)) { printf("confused fd pointers\n"); } read = bp->b_flags & B_READ; format = bp->b_flags & B_FORMAT; if(format) finfo = (struct fd_formb *)bp->b_un.b_addr; TRACE1("fd%d", fdu); TRACE1("[%s]", fdstates[fdc->state]); TRACE1("(0x%x)", fd->flags); untimeout(fd_turnoff, (caddr_t)fdu); timeout(fd_turnoff, (caddr_t)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; outb(fdc->baseport+FDCTL, fd->ft->trans); TRACE1("[0x%x->FDCTL]", fd->ft->trans); /*******************************************************\ * 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, TURNON); } 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, (caddr_t)fdcu, hz / 32); fdc->state = SEEKCOMPLETE; return(0); /* will return later */ case SEEKCOMPLETE : /* SEEK DONE, START DMA */ /* Make sure seek really happened*/ if(fd->track == -2) { int descyl = bp->b_cylin * fd->ft->steptrac; do { out_fdc(fdcu, NE7CMD_SENSEI); st0 = in_fdc(fdcu); cyl = in_fdc(fdcu); /* * if this was a "ready changed" interrupt, * fetch status again (can happen after * enabling controller from reset state) */ } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); if (0 == descyl) { /* * seek to cyl 0 requested; make sure we are * really there */ out_fdc(fdcu, NE7CMD_SENSED); out_fdc(fdcu, fdu); st3 = in_fdc(fdcu); if ((st3 & NE7_ST3_T0) == 0) { printf( "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", fdu, st3, NE7_ST3BITS); if(fdc->retry < 3) fdc->retry = 3; return(retrier(fdcu)); } } if (cyl != descyl) { printf( "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", fdu, descyl, cyl, st0, NE7_ST0BITS); return(retrier(fdcu)); } } fd->track = bp->b_cylin; if(format) fd->skip = (char *)&(finfo->fd_formb_cylno(0)) - (char *)finfo; isa_dmastart(bp->b_flags, bp->b_un.b_addr+fd->skip, format ? bp->b_bcount : 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; fd->hddrv = ((head&1)<<2)+fdu; if(format || !read) { /* make sure the drive is writable */ out_fdc(fdcu, NE7CMD_SENSED); out_fdc(fdcu, fdu); st3 = in_fdc(fdcu); if(st3 & NE7_ST3_WP) { /* * XXX YES! this is ugly. * in order to force the current operation * to fail, we will have to fake an FDC * error - all error handling is done * by the retrier() */ fdc->status[0] = NE7_ST0_IC_AT; fdc->status[1] = NE7_ST1_NW; fdc->status[2] = 0; fdc->status[3] = fd->track; fdc->status[4] = head; fdc->status[5] = sec; fdc->retry = 8; /* break out immediately */ fdc->state = IOTIMEDOUT; /* not really... */ return (1); } } if(format) { /* formatting */ out_fdc(fdcu, NE7CMD_FORMAT); out_fdc(fdcu, head << 2 | fdu); out_fdc(fdcu, finfo->fd_formb_secshift); out_fdc(fdcu, finfo->fd_formb_nsecs); out_fdc(fdcu, finfo->fd_formb_gaplen); out_fdc(fdcu, finfo->fd_formb_fillbyte); } else { 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, (caddr_t)fdcu, hz); return(0); /* will return later */ case IOCOMPLETE: /* IO DONE, post-analyze */ untimeout(fd_timeout, (caddr_t)fdcu); for(i=0;i<7;i++) { fdc->status[i] = in_fdc(fdcu); } fdc->state = IOTIMEDOUT; /* FALLTHROUGH */ case IOTIMEDOUT: isa_dmadone(bp->b_flags, bp->b_un.b_addr+fd->skip, format ? bp->b_bcount : fdblk, fdc->dmachan); if (fdc->status[0] & NE7_ST0_IC) { if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT && fdc->status[1] & NE7_ST1_OR) { /* * DMA overrun. Someone hogged the bus * and didn't release it in time for the * next FDC transfer. * Just restart it, don't increment retry * count. (vak) */ fdc->state = SEEKCOMPLETE; return (1); } else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV && fdc->retry < 6) fdc->retry = 6; /* force a reset */ else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT && fdc->status[2] & NE7_ST2_WC && fdc->retry < 3) fdc->retry = 3; /* force recalibrate */ return(retrier(fdcu)); } /* All OK */ fd->skip += fdblk; if (!format && 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->b_actf; biodone(bp); fdc->fd = (fd_p) 0; fdc->fdu = -1; fdc->state = FINDWORK; } return(1); case RESETCTLR: fdc_reset(fdc); fdc->retry++; fdc->state = STARTRECAL; break; case STARTRECAL: 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, (caddr_t)fdcu, hz / 32); fdc->state = RECALCOMPLETE; return(0); /* will return later */ case RECALCOMPLETE: do { out_fdc(fdcu, NE7CMD_SENSEI); st0 = in_fdc(fdcu); cyl = in_fdc(fdcu); /* * if this was a "ready changed" interrupt, * fetch status again (can happen after * enabling controller from reset state) */ } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) { printf("fd%d: recal failed ST0 %b cyl %d\n", fdu, st0, NE7_ST0BITS, cyl); if(fdc->retry < 3) fdc->retry = 3; 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 */ } /* * since the controller was off, it has lost its * idea about the current track it were; thus, * recalibrate the bastard */ fdc->state = STARTRECAL; 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 = %x, PCN = %x\n", st0, cyl); out_fdc(fdcu, NE7CMD_READID); out_fdc(fdcu, fd->fdsu); for(i=0;i<7;i++) { fdc->status[i] = in_fdc(fdcu); } if(fdc->status[0] != -1) printf("intr status :%lx %lx %lx %lx %lx %lx %lx\n", fdc->status[0], fdc->status[1], fdc->status[2], fdc->status[3], fdc->status[4], fdc->status[5], fdc->status[6] ); else printf("FDC timed out\n"); return(0); } return(1); /* Come back immediatly to new state */ } static int retrier(fdcu) fdcu_t fdcu; { fdc_p fdc = fdc_data + fdcu; register struct buf *dp, *bp; dp = &(fdc->head); bp = dp->b_actf; if(fd_data[FDUNIT(minor(bp->b_dev))].options & FDOPT_NORETRY) goto fail; 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: fail: { dev_t sav_b_dev = bp->b_dev; /* Trick diskerr */ bp->b_dev = makedev(major(bp->b_dev), (FDUNIT(minor(bp->b_dev))<<3)|RAW_PART); diskerr(bp, "fd", "hard error", LOG_PRINTF, fdc->fd->skip / DEV_BSIZE, (struct disklabel *)NULL); bp->b_dev = sav_b_dev; printf(" (ST0 %b ", fdc->status[0], NE7_ST0BITS); printf(" ST1 %b ", fdc->status[1], NE7_ST1BITS); printf(" ST2 %b ", fdc->status[2], NE7_ST2BITS); printf("cyl %d hd %d sec %d)\n", fdc->status[3], fdc->status[4], fdc->status[5]); } bp->b_flags |= B_ERROR; bp->b_error = EIO; bp->b_resid = bp->b_bcount - fdc->fd->skip; dp->b_actf = bp->b_actf; fdc->fd->skip = 0; biodone(bp); fdc->state = FINDWORK; fdc->fd = (fd_p) 0; fdc->fdu = -1; /* XXX abort current command, if any. */ return(1); } fdc->retry++; return(1); } static int fdformat(dev, finfo, p) dev_t dev; struct fd_formb *finfo; struct proc *p; { fdu_t fdu; fd_p fd; struct buf *bp; int rv = 0, s; size_t fdblk; fdu = FDUNIT(minor(dev)); fd = &fd_data[fdu]; fdblk = 128 << fd->ft->secsize; /* set up a buffer header for fdstrategy() */ bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT); if(bp == 0) return ENOBUFS; bzero((void *)bp, sizeof(struct buf)); bp->b_flags = B_BUSY | B_PHYS | B_FORMAT; bp->b_proc = p; bp->b_dev = dev; /* * calculate a fake blkno, so fdstrategy() would initiate a * seek to the requested cylinder */ bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads) + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE; bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; bp->b_un.b_addr = (caddr_t)finfo; /* now do the format */ fdstrategy(bp); /* ...and wait for it to complete */ s = splbio(); while(!(bp->b_flags & B_DONE)) { rv = tsleep((caddr_t)bp, PRIBIO, "fdform", 20 * hz); if(rv == EWOULDBLOCK) break; } splx(s); if(rv == EWOULDBLOCK) /* timed out */ rv = EIO; if(bp->b_flags & B_ERROR) rv = bp->b_error; biodone(bp); free(bp, M_TEMP); return rv; } /* * * TODO: Think about allocating buffer off stack. * Don't pass uncast 0's and NULL's to read/write/setdisklabel(). * Watch out for NetBSD's different *disklabel() interface. * */ int fdioctl(dev, cmd, addr, flag, p) dev_t dev; int cmd; caddr_t addr; int flag; struct proc *p; { fdu_t fdu = FDUNIT(minor(dev)); fd_p fd = &fd_data[fdu]; size_t fdblk; struct fd_type *fdt; struct disklabel *dl; char buffer[DEV_BSIZE]; int error = 0; #if NFT > 0 int type = FDTYPE(minor(dev)); /* check for a tape ioctl */ if (type & F_TAPE_TYPE) return ftioctl(dev, cmd, addr, flag, p); #endif fdblk = 128 << fd->ft->secsize; switch (cmd) { case DIOCGDINFO: bzero(buffer, sizeof (buffer)); dl = (struct disklabel *)buffer; dl->d_secsize = fdblk; fdt = fd_data[FDUNIT(minor(dev))].ft; dl->d_secpercyl = fdt->size / fdt->tracks; dl->d_type = DTYPE_FLOPPY; if (readdisklabel(dev, fdstrategy, dl, NULL, 0, 0) == NULL) error = 0; else error = EINVAL; *(struct disklabel *)addr = *dl; break; case DIOCSDINFO: if ((flag & FWRITE) == 0) error = EBADF; break; case DIOCWLABEL: if ((flag & FWRITE) == 0) error = EBADF; break; case DIOCWDINFO: if ((flag & FWRITE) == 0) { error = EBADF; break; } dl = (struct disklabel *)addr; if ((error = setdisklabel ((struct disklabel *)buffer, dl, 0, NULL))) break; error = writedisklabel(dev, fdstrategy, (struct disklabel *)buffer, NULL); break; case FD_FORM: if((flag & FWRITE) == 0) error = EBADF; /* must be opened for writing */ else if(((struct fd_formb *)addr)->format_version != FD_FORMAT_VERSION) error = EINVAL; /* wrong version of formatting prog */ else error = fdformat(dev, (struct fd_formb *)addr, p); break; case FD_GTYPE: /* get drive type */ *(struct fd_type *)addr = *fd_data[FDUNIT(minor(dev))].ft; break; case FD_STYPE: /* set drive type */ /* this is considered harmful; only allow for superuser */ if(suser(p->p_ucred, &p->p_acflag) != 0) return EPERM; *fd_data[FDUNIT(minor(dev))].ft = *(struct fd_type *)addr; break; case FD_GOPTS: /* get drive options */ *(int *)addr = fd_data[FDUNIT(minor(dev))].options; break; case FD_SOPTS: /* set drive options */ fd_data[FDUNIT(minor(dev))].options = *(int *)addr; break; default: error = ENOTTY; break; } return (error); } #endif /* * Hello emacs, these are the * Local Variables: * c-indent-level: 8 * c-continued-statement-offset: 8 * c-continued-brace-offset: 0 * c-brace-offset: -8 * c-brace-imaginary-offset: 0 * c-argdecl-indent: 8 * c-label-offset: -8 * c++-hanging-braces: 1 * c++-access-specifier-offset: -8 * c++-empty-arglist-indent: 8 * c++-friend-offset: 0 * End: */