/* * 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. * * Copyright (c) 1993, 1994 by * jc@irbs.UUCP (John Capo) * vak@zebub.msk.su (Serge Vakulenko) * ache@astral.msk.su (Andrew A. Chernov) * * Copyright (c) 1993, 1994, 1995 by * joerg_wunsch@uriah.sax.de (Joerg Wunsch) * dufault@hda.com (Peter Dufault) * * 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 1.121 1998/09/14 19:56:39 sos Exp $ * */ #include "ft.h" #if NFT < 1 #undef NFDC #endif #include "fd.h" #include "opt_devfs.h" #include "opt_fdc.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 #ifdef DEVFS #include #endif /* DEVFS */ /* misuse a flag to identify format operation */ #define B_FORMAT B_XXX /* configuration flags */ #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */ /* internally used only, not really from CMOS: */ #define RTCFDT_144M_PRETENDED 0x1000 /* * this biotab field doubles as a field for the physical unit number * on the controller */ #define id_physid id_scsiid /* error returns for fd_cmd() */ #define FD_FAILED -1 #define FD_NOT_VALID -2 #define FDC_ERRMAX 100 /* do not log more */ #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 static 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) * \***********************************************************************/ static 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; #define FD_NO_TRACK -2 int track; /* where we think the head is */ int options; /* user configurable options, see ioctl_fd.h */ struct callout_handle toffhandle; struct callout_handle tohandle; struct devstat device_stats; #ifdef DEVFS void *bdevs[1 + NUMDENS + MAXPARTITIONS]; void *cdevs[1 + NUMDENS + MAXPARTITIONS]; #endif } 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, unsigned long, caddr_t, int, struct proc *); int ftdump(dev_t); int ftsize(dev_t); int ftattach(struct isa_device *, struct isa_device *, int); #endif /* autoconfig functions */ static int fdprobe(struct isa_device *); static int fdattach(struct isa_device *); /* 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 int fd_in(fdcu_t, int *); static void fdstart(fdcu_t); static timeout_t fd_iotimeout; 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 *); static int enable_fifo(fdc_p fdc); static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ #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 #define RESETCOMPLETE 12 #ifdef FDC_DEBUG static char const * const fdstates[] = { "DEVIDLE", "FINDWORK", "DOSEEK", "SEEKCOMPLETE", "IOCOMPLETE", "RECALCOMPLETE", "STARTRECAL", "RESETCTLR", "SEEKWAIT", "RECALWAIT", "MOTORWAIT", "IOTIMEDOUT", "RESETCOMPLETE", }; /* CAUTION: fd_debug causes huge amounts of logging output */ static int volatile fd_debug = 0; #define TRACE0(arg) if(fd_debug) printf(arg) #define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2) #else /* FDC_DEBUG */ #define TRACE0(arg) #define TRACE1(arg1, arg2) #endif /* FDC_DEBUG */ /* autoconfig structure */ struct isa_driver fdcdriver = { fdprobe, fdattach, "fdc", }; static d_open_t Fdopen; /* NOTE, not fdopen */ static d_read_t fdread; static d_write_t fdwrite; static d_close_t fdclose; static d_ioctl_t fdioctl; static d_strategy_t fdstrategy; /* even if SLICE defined, these are needed for the ft support. */ #define CDEV_MAJOR 9 #define BDEV_MAJOR 2 static struct cdevsw fd_cdevsw = { Fdopen, fdclose, fdread, fdwrite, fdioctl, nostop, nullreset, nodevtotty, seltrue, nommap, fdstrategy, "fd", NULL, -1, nodump, nopsize, D_DISK, 0, -1 }; static struct isa_device *fdcdevs[NFDC]; static int fdc_err(fdcu_t fdcu, const char *s) { fdc_data[fdcu].fdc_errs++; if(s) { if(fdc_data[fdcu].fdc_errs < FDC_ERRMAX) printf("fdc%d: %s", fdcu, s); else if(fdc_data[fdcu].fdc_errs == FDC_ERRMAX) printf("fdc%d: too many errors, not logging any more\n", fdcu); } return FD_FAILED; } /* * fd_cmd: Send a command to the chip. Takes a varargs with this structure: * Unit number, * # of output bytes, output bytes as ints ..., * # of input bytes, input bytes as ints ... */ static int fd_cmd(fdcu_t fdcu, int n_out, ...) { u_char cmd; int n_in; int n; va_list ap; va_start(ap, n_out); cmd = (u_char)(va_arg(ap, int)); va_end(ap); va_start(ap, n_out); for (n = 0; n < n_out; n++) { if (out_fdc(fdcu, va_arg(ap, int)) < 0) { char msg[50]; sprintf(msg, "cmd %x failed at out byte %d of %d\n", cmd, n + 1, n_out); return fdc_err(fdcu, msg); } } n_in = va_arg(ap, int); for (n = 0; n < n_in; n++) { int *ptr = va_arg(ap, int *); if (fd_in(fdcu, ptr) < 0) { char msg[50]; sprintf(msg, "cmd %02x failed at in byte %d of %d\n", cmd, n + 1, n_in); return fdc_err(fdcu, msg); } } return 0; } static int enable_fifo(fdc_p fdc) { int i, j; if ((fdc->flags & FDC_HAS_FIFO) == 0) { /* * XXX: * Cannot use fd_cmd the normal way here, since * this might be an invalid command. Thus we send the * first byte, and check for an early turn of data directon. */ if (out_fdc(fdc->fdcu, I8207X_CONFIGURE) < 0) return fdc_err(fdc->fdcu, "Enable FIFO failed\n"); /* If command is invalid, return */ j = 100000; while ((i = inb(fdc->baseport + FDSTS) & (NE7_DIO | NE7_RQM)) != NE7_RQM && j-- > 0) if (i == (NE7_DIO | NE7_RQM)) { fdc_reset(fdc); return FD_FAILED; } if (j<0 || fd_cmd(fdc->fdcu, 3, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { fdc_reset(fdc); return fdc_err(fdc->fdcu, "Enable FIFO failed\n"); } fdc->flags |= FDC_HAS_FIFO; return 0; } if (fd_cmd(fdc->fdcu, 4, I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) return fdc_err(fdc->fdcu, "Re-enable FIFO failed\n"); return 0; } static int fd_sense_drive_status(fdc_p fdc, int *st3p) { int st3; if (fd_cmd(fdc->fdcu, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) { return fdc_err(fdc->fdcu, "Sense Drive Status failed\n"); } if (st3p) *st3p = st3; return 0; } static int fd_sense_int(fdc_p fdc, int *st0p, int *cylp) { int st0, cyl; int ret = fd_cmd(fdc->fdcu, 1, NE7CMD_SENSEI, 1, &st0); if (ret) { (void)fdc_err(fdc->fdcu, "sense intr err reading stat reg 0\n"); return ret; } if (st0p) *st0p = st0; if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { /* * There doesn't seem to have been an interrupt. */ return FD_NOT_VALID; } if (fd_in(fdc->fdcu, &cyl) < 0) { return fdc_err(fdc->fdcu, "can't get cyl num\n"); } if (cylp) *cylp = cyl; return 0; } static int fd_read_status(fdc_p fdc, int fdsu) { int i, ret; for (i = 0; i < 7; i++) { /* * XXX types are poorly chosen. Only bytes can by read * from the hardware, but fdc->status[] wants u_ints and * fd_in() gives ints. */ int status; ret = fd_in(fdc->fdcu, &status); fdc->status[i] = status; if (ret != 0) break; } if (ret == 0) fdc->flags |= FDC_STAT_VALID; else fdc->flags &= ~FDC_STAT_VALID; return ret; } /****************************************************************************/ /* autoconfiguration stuff */ /****************************************************************************/ /* * probe for existance of controller */ static int fdprobe(struct isa_device *dev) { fdcu_t fdcu = dev->id_unit; if(fdc_data[fdcu].flags & FDC_ATTACHED) { printf("fdc%d: unit used multiple times\n", fdcu); return 0; } fdcdevs[fdcu] = dev; 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 (fd_cmd(fdcu, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 0)) { return(0); } return (IO_FDCSIZE); } /* * wire controller into system, look for floppy units */ static int fdattach(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, st3, i; #if NFT > 0 int unithasfd; #endif struct isa_device *fdup; int ic_type = 0; #ifdef DEVFS int mynor; int typemynor; int typesize; #endif fdc->fdcu = fdcu; fdc->flags |= FDC_ATTACHED; fdc->dmachan = dev->id_drq; /* Acquire the DMA channel forever, The driver will do the rest */ isa_dma_acquire(fdc->dmachan); isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */); fdc->state = DEVIDLE; /* reset controller, turn motor off, clear fdout mirror reg */ outb(fdc->baseport + FDOUT, ((fdc->fdout = 0))); bufq_init(&fdc->head); /* 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: if (dev->id_flags & FDC_PRETEND_D0) fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED; else 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. */ /* Tell FT if there was already a disk */ /* with this unit number found. */ unithasfd = 0; if (fdu < NFD && fd->type != NO_TYPE) unithasfd = 1; if (ftattach(dev, fdup, unithasfd)) continue; if (fdsu < DRVS_PER_CTLR) fd->type = NO_TYPE; #endif continue; } /* select it */ set_motor(fdcu, fdsu, TURNON); DELAY(1000000); /* 1 sec */ if (ic_type == 0 && fd_cmd(fdcu, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { #ifdef FDC_PRINT_BOGUS_CHIPTYPE printf("fdc%d: ", fdcu); #endif ic_type = (u_char)ic_type; switch( ic_type ) { case 0x80: #ifdef FDC_PRINT_BOGUS_CHIPTYPE printf("NEC 765\n"); #endif fdc->fdct = FDC_NE765; break; case 0x81: #ifdef FDC_PRINT_BOGUS_CHIPTYPE printf("Intel 82077\n"); #endif fdc->fdct = FDC_I82077; break; case 0x90: #ifdef FDC_PRINT_BOGUS_CHIPTYPE printf("NEC 72065B\n"); #endif fdc->fdct = FDC_NE72065; break; default: #ifdef FDC_PRINT_BOGUS_CHIPTYPE printf("unknown IC type %02x\n", ic_type); #endif fdc->fdct = FDC_UNKNOWN; break; } if (fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN && enable_fifo(fdc) == 0) { printf("fdc%d: FIFO enabled", fdcu); printf(", %d bytes threshold\n", fifo_threshold); } } if ((fd_cmd(fdcu, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) && (st3 & NE7_ST3_T0)) { /* if at track 0, first seek inwards */ /* seek some steps: */ (void)fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0); DELAY(300000); /* ...wait a moment... */ (void)fd_sense_int(fdc, 0, 0); /* make ctrlr happy */ } /* If we're at track 0 first seek inwards. */ if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) { /* Seek some steps... */ if (fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { /* ...wait a moment... */ DELAY(300000); /* make ctrlr happy: */ (void)fd_sense_int(fdc, 0, 0); } } 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 */ /* go back to 0: */ if (fd_cmd(fdcu, 2, NE7CMD_RECAL, fdsu, 0) == 0) { /* a second being enough for full stroke seek*/ DELAY(i == 0? 1000000: 300000); /* anything responding? */ if (fd_sense_int(fdc, &st0, 0) == 0 && (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 = FD_NO_TRACK; fd->fdc = fdc; fd->fdsu = fdsu; fd->options = 0; callout_handle_init(&fd->toffhandle); callout_handle_init(&fd->tohandle); printf("fd%d: ", fdu); switch (fdt) { case RTCFDT_12M: printf("1.2MB 5.25in\n"); fd->type = FD_1200; break; case RTCFDT_144M | RTCFDT_144M_PRETENDED: printf("config-pretended "); fdt = RTCFDT_144M; /* fallthrough */ case RTCFDT_144M: printf("1.44MB 3.5in\n"); fd->type = FD_1440; break; case RTCFDT_288M: case RTCFDT_288M_1: printf("2.88MB 3.5in - 1.44MB mode\n"); fd->type = FD_1440; break; case RTCFDT_360K: printf("360KB 5.25in\n"); fd->type = FD_360; break; case RTCFDT_720K: printf("720KB 3.5in\n"); fd->type = FD_720; break; default: printf("unknown\n"); fd->type = NO_TYPE; continue; } #ifdef DEVFS mynor = fdu << 6; fd->bdevs[0] = devfs_add_devswf(&fd_cdevsw, mynor, DV_BLK, UID_ROOT, GID_OPERATOR, 0640, "fd%d", fdu); fd->cdevs[0] = devfs_add_devswf(&fd_cdevsw, mynor, DV_CHR, UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fdu); for (i = 1; i < 1 + NUMDENS; i++) { /* * XXX this and the lookup in Fdopen() should be * data driven. */ switch (fd->type) { case FD_360: if (i != FD_360) continue; break; case FD_720: if (i != FD_720 && i != FD_800 && i != FD_820) continue; break; case FD_1200: if (i != FD_360 && i != FD_720 && i != FD_800 && i != FD_820 && i != FD_1200 && i != FD_1440 && i != FD_1480) continue; break; case FD_1440: if (i != FD_720 && i != FD_800 && i != FD_820 && i != FD_1200 && i != FD_1440 && i != FD_1480 && i != FD_1720) continue; break; } typesize = fd_types[i - 1].size / 2; /* * XXX all these conversions give bloated code and * confusing names. */ if (typesize == 1476) typesize = 1480; if (typesize == 1722) typesize = 1720; typemynor = mynor | i; fd->bdevs[i] = devfs_add_devswf(&fd_cdevsw, typemynor, DV_BLK, UID_ROOT, GID_OPERATOR, 0640, "fd%d.%d", fdu, typesize); fd->cdevs[i] = devfs_add_devswf(&fd_cdevsw, typemynor, DV_CHR, UID_ROOT, GID_OPERATOR, 0640, "rfd%d.%d", fdu, typesize); } for (i = 0; i < MAXPARTITIONS; i++) { fd->bdevs[1 + NUMDENS + i] = devfs_link(fd->bdevs[0], "fd%d%c", fdu, 'a' + i); fd->cdevs[1 + NUMDENS + i] = devfs_link(fd->cdevs[0], "rfd%d%c", fdu, 'a' + i); } #endif /* DEVFS */ /* * Export the drive to the devstat interface. */ devstat_add_entry(&fd->device_stats, "fd", fdu, 512, DEVSTAT_NO_ORDERED_TAGS, DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER); } return (1); } /****************************************************************************/ /* motor control stuff */ /* remember to not deselect the drive we're working on */ /****************************************************************************/ static void set_motor(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) { /* * XXX * special case: since we have just woken up the FDC * from its sleep, we silently assume the command will * be accepted, and do not test for a timeout */ (void)fd_cmd(fdcu, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 0); if (fdc_data[fdcu].flags & FDC_HAS_FIFO) (void) enable_fifo(&fdc_data[fdcu]); } } static void fd_turnoff(void *arg1) { fdu_t fdu = (fdu_t)arg1; int s; fd_p fd = fd_data + fdu; TRACE1("[fd%d: turnoff]", fdu); /* * Don't turn off the motor yet if the drive is active. * XXX shouldn't even schedule turnoff until drive is inactive * and nothing is queued on it. */ if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fdu) { fd->toffhandle = timeout(fd_turnoff, arg1, 4 * hz); return; } s = splbio(); fd->flags &= ~FD_MOTOR; set_motor(fd->fdc->fdcu, fd->fdsu, TURNOFF); splx(s); } 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_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_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); /* XXX after a reset, silently believe the FDC will accept commands */ (void)fd_cmd(fdcu, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 0); if (fdc->flags & FDC_HAS_FIFO) (void) enable_fifo(fdc); } /****************************************************************************/ /* 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 fdc_err(fdcu, "ready for output in input\n"); if (j <= 0) return fdc_err(fdcu, bootverbose? "input ready timeout\n": 0); #ifdef FDC_DEBUG i = inb(baseport+FDDATA); TRACE1("[FDDATA->0x%x]", (unsigned char)i); return(i); #else /* !FDC_DEBUG */ return inb(baseport+FDDATA); #endif /* FDC_DEBUG */ } /* * fd_in: Like in_fdc, but allows you to see if it worked. */ static int fd_in(fdcu_t fdcu, int *ptr) { 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 fdc_err(fdcu, "ready for output in input\n"); if (j <= 0) return fdc_err(fdcu, bootverbose? "input ready timeout\n": 0); #ifdef FDC_DEBUG i = inb(baseport+FDDATA); TRACE1("[FDDATA->0x%x]", (unsigned char)i); *ptr = i; return 0; #else /* !FDC_DEBUG */ i = inb(baseport+FDDATA); if (ptr) *ptr = i; return 0; #endif /* FDC_DEBUG */ } int out_fdc(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 fdc_err(fdcu, "direction bit not set\n"); /* 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 fdc_err(fdcu, bootverbose? "output ready timeout\n": 0); /* Send the command and return */ outb(baseport+FDDATA, x); TRACE1("[0x%x->FDDATA]", x); return (0); } /****************************************************************************/ /* fdopen/fdclose */ /****************************************************************************/ int Fdopen(dev_t dev, int flags, int mode, struct proc *p) { 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 { /* * For each type of basic drive, make sure we are trying * to open a type it can do, */ 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_t dev, int flags, int mode, struct proc *p) { 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); } static int fdread(dev_t dev, struct uio *uio, int ioflag) { return (physio(fdstrategy, NULL, dev, 1, minphys, uio)); } static int fdwrite(dev_t dev, struct uio *uio, int ioflag) { return (physio(fdstrategy, NULL, dev, 0, minphys, uio)); } /****************************************************************************/ /* fdstrategy */ /****************************************************************************/ void fdstrategy(struct buf *bp) { unsigned nblocks, blknum, cando; 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; #if NFT > 0 if (FDTYPE(minor(bp->b_dev)) & F_TAPE_TYPE) { /* ft tapes do not (yet) support strategy i/o */ bp->b_error = ENODEV; 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 fdblk = 128 << (fd->ft->secsize); if (!(bp->b_flags & B_FORMAT)) { if ((fdu >= NFD) || (bp->b_blkno < 0)) { printf( "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n", fdu, (u_long)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. */ if (bp->b_blkno > 20000000) { /* * Reject unreasonably high block number, prevent the * multiplication below from overflowing. */ bp->b_error = EINVAL; bp->b_flags |= B_ERROR; goto bad; } blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk; nblocks = fd->ft->size; bp->b_resid = 0; if (blknum + (bp->b_bcount / fdblk) > nblocks) { if (blknum <= nblocks) { cando = (nblocks - blknum) * fdblk; bp->b_resid = bp->b_bcount - cando; if (cando == 0) goto bad; /* not actually bad but EOF */ } else { bp->b_error = EINVAL; bp->b_flags |= B_ERROR; goto bad; } } bp->b_pblkno = bp->b_blkno; s = splbio(); bufqdisksort(&fdc->head, bp); untimeout(fd_turnoff, (caddr_t)fdu, fd->toffhandle); /* a good idea */ /* Tell devstat we are starting on the transaction */ devstat_start_transaction(&fd->device_stats); 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_t fdcu) { int s; s = splbio(); if(fdc_data[fdcu].state == DEVIDLE) { fdintr(fdcu); } splx(s); } static void fd_iotimeout(void *arg1) { fdc_p fdc; fdcu_t fdcu; int s; fdcu = (fdcu_t)arg1; fdc = fdc_data + fdcu; TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); /* * 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! * The FDC must not be reset directly, since that would * interfere with the state machine. Instead, pretend that * the command completed but was invalid. The state machine * will reset the FDC and retry once. */ s = splbio(); fdc->status[0] = NE7_ST0_IC_IV; fdc->flags &= ~FDC_STAT_VALID; fdc->state = IOTIMEDOUT; fdintr(fdcu); splx(s); } /* just ensure it has the right spl */ 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_t fdcu, fdc_p fdc) { struct subdev *sd; int read, format, head, i, sec = 0, sectrac, st0, cyl, st3; unsigned blknum = 0, b_cylinder = 0; fdu_t fdu = fdc->fdu; fd_p fd; register struct buf *bp; struct fd_formb *finfo = NULL; size_t fdblk; bp = bufq_first(&fdc->head); if(!bp) { /***********************************************\ * nothing left for this controller to do * * Force into the IDLE state, * \***********************************************/ fdc->state = DEVIDLE; if(fdc->fd) { printf("fd%d: unexpected valid fd pointer\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("fd%d: confused fd pointers\n", fdu); } read = bp->b_flags & B_READ; format = bp->b_flags & B_FORMAT; if(format) { finfo = (struct fd_formb *)bp->b_data; fd->skip = (char *)&(finfo->fd_formb_cylno(0)) - (char *)finfo; } if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) { blknum = (unsigned) bp->b_pblkno * DEV_BSIZE/fdblk + fd->skip/fdblk; b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); } TRACE1("fd%d", fdu); TRACE1("[%s]", fdstates[fdc->state]); TRACE1("(0x%x)", fd->flags); untimeout(fd_turnoff, (caddr_t)fdu, fd->toffhandle); fd->toffhandle = 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 its 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); } if (fdc->flags & FDC_NEEDS_RESET) { fdc->state = RESETCTLR; fdc->flags &= ~FDC_NEEDS_RESET; } else fdc->state = DOSEEK; break; case DOSEEK: if (b_cylinder == (unsigned)fd->track) { fdc->state = SEEKCOMPLETE; break; } if (fd_cmd(fdcu, 3, NE7CMD_SEEK, fd->fdsu, b_cylinder * fd->ft->steptrac, 0)) { /* * seek command not accepted, looks like * the FDC went off to the Saints... */ fdc->retry = 6; /* try a reset */ return(retrier(fdcu)); } fd->track = FD_NO_TRACK; fdc->state = SEEKWAIT; return(0); /* will return later */ case SEEKWAIT: /* allow heads to settle */ timeout(fd_pseudointr, (caddr_t)fdcu, hz / 16); fdc->state = SEEKCOMPLETE; return(0); /* will return later */ case SEEKCOMPLETE : /* SEEK DONE, START DMA */ /* Make sure seek really happened*/ if(fd->track == FD_NO_TRACK) { int descyl = b_cylinder * fd->ft->steptrac; do { /* * This might be a "ready changed" interrupt, * which cannot really happen since the * RDY pin is hardwired to + 5 volts. This * generally indicates a "bouncing" intr * line, so do one of the following: * * When running on an enhanced FDC that is * known to not go stuck after responding * with INVALID, fetch all interrupt states * until seeing either an INVALID or a * real interrupt condition. * * When running on a dumb old NE765, give * up immediately. The controller will * provide up to four dummy RC interrupt * conditions right after reset (for the * corresponding four drives), so this is * our only chance to get notice that it * was not the FDC that caused the interrupt. */ if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) return 0; if(fdc->fdct == FDC_NE765 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) return 0; /* hope for a real intr */ } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); if (0 == descyl) { int failed = 0; /* * seek to cyl 0 requested; make sure we are * really there */ if (fd_sense_drive_status(fdc, &st3)) failed = 1; if ((st3 & NE7_ST3_T0) == 0) { printf( "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", fdu, st3, NE7_ST3BITS); failed = 1; } if (failed) { 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); if (fdc->retry < 3) fdc->retry = 3; return(retrier(fdcu)); } } fd->track = b_cylinder; isa_dmastart(bp->b_flags, bp->b_data+fd->skip, format ? bp->b_bcount : fdblk, fdc->dmachan); 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 */ if(fd_sense_drive_status(fdc, &st3) != 0) { /* stuck controller? */ isa_dmadone(bp->b_flags, bp->b_data + fd->skip, format ? bp->b_bcount : fdblk, fdc->dmachan); fdc->retry = 6; /* reset the beast */ return(retrier(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 */ if(fd_cmd(fdcu, 6, NE7CMD_FORMAT, head << 2 | fdu, finfo->fd_formb_secshift, finfo->fd_formb_nsecs, finfo->fd_formb_gaplen, finfo->fd_formb_fillbyte, 0)) { /* controller fell over */ isa_dmadone(bp->b_flags, bp->b_data + fd->skip, format ? bp->b_bcount : fdblk, fdc->dmachan); fdc->retry = 6; return(retrier(fdcu)); } } else { if (fd_cmd(fdcu, 9, (read ? NE7CMD_READ : NE7CMD_WRITE), head << 2 | fdu, /* head & unit */ fd->track, /* track */ head, sec, /* sector + 1 */ fd->ft->secsize, /* sector size */ sectrac, /* sectors/track */ fd->ft->gap, /* gap size */ fd->ft->datalen, /* data length */ 0)) { /* the beast is sleeping again */ isa_dmadone(bp->b_flags, bp->b_data + fd->skip, format ? bp->b_bcount : fdblk, fdc->dmachan); fdc->retry = 6; return(retrier(fdcu)); } } fdc->state = IOCOMPLETE; fd->tohandle = timeout(fd_iotimeout, (caddr_t)fdcu, hz); return(0); /* will return later */ case IOCOMPLETE: /* IO DONE, post-analyze */ untimeout(fd_iotimeout, (caddr_t)fdcu, fd->tohandle); if (fd_read_status(fdc, fd->fdsu)) { isa_dmadone(bp->b_flags, bp->b_data + fd->skip, format ? bp->b_bcount : fdblk, fdc->dmachan); if (fdc->retry < 6) fdc->retry = 6; /* force a reset */ return retrier(fdcu); } fdc->state = IOTIMEDOUT; /* FALLTHROUGH */ case IOTIMEDOUT: isa_dmadone(bp->b_flags, bp->b_data + 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 - bp->b_resid) { /* set up next transfer */ fdc->state = DOSEEK; } else { /* ALL DONE */ fd->skip = 0; bufq_remove(&fdc->head, bp); /* Tell devstat we have finished with the transaction */ devstat_end_transaction(&fd->device_stats, bp->b_bcount - bp->b_resid, DEVSTAT_TAG_NONE, (bp->b_flags & B_READ) ? DEVSTAT_READ : DEVSTAT_WRITE); biodone(bp); fdc->fd = (fd_p) 0; fdc->fdu = -1; fdc->state = FINDWORK; } return(1); case RESETCTLR: fdc_reset(fdc); fdc->retry++; fdc->state = RESETCOMPLETE; return (0); case RESETCOMPLETE: /* * Discard all the results from the reset so that they * can't cause an unexpected interrupt later. */ for (i = 0; i < 4; i++) (void)fd_sense_int(fdc, &st0, &cyl); fdc->state = STARTRECAL; /* Fall through. */ case STARTRECAL: if(fd_cmd(fdcu, 2, NE7CMD_RECAL, fdu, 0)) /* Recalibrate Function */ { /* arrgl */ fdc->retry = 6; return(retrier(fdcu)); } fdc->state = RECALWAIT; return(0); /* will return later */ case RECALWAIT: /* allow heads to settle */ timeout(fd_pseudointr, (caddr_t)fdcu, hz / 8); fdc->state = RECALCOMPLETE; return(0); /* will return later */ case RECALCOMPLETE: do { /* * See SEEKCOMPLETE for a comment on this: */ if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) return 0; if(fdc->fdct == FDC_NE765 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) return 0; /* hope for a real intr */ } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) { if(fdc->retry > 3) /* * a recalibrate from beyond cylinder 77 * will "fail" due to the FDC limitations; * since people used to complain much about * the failure message, try not logging * this one if it seems to be the first * time in a line */ 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 */ } if (fdc->flags & FDC_NEEDS_RESET) { fdc->state = RESETCTLR; fdc->flags &= ~FDC_NEEDS_RESET; } else { /* * If all motors were off, then the controller was * reset, so it has lost track of the current * cylinder. Recalibrate to handle this case. */ fdc->state = STARTRECAL; } return(1); /* will return immediatly */ default: printf("fdc%d: Unexpected FD int->", fdcu); if (fd_read_status(fdc, fd->fdsu) == 0) printf("FDC status :%x %x %x %x %x %x %x ", fdc->status[0], fdc->status[1], fdc->status[2], fdc->status[3], fdc->status[4], fdc->status[5], fdc->status[6] ); else printf("No status available "); if (fd_sense_int(fdc, &st0, &cyl) != 0) { printf("[controller is dead now]\n"); return(0); } printf("ST0 = %x, PCN = %x\n", st0, cyl); return(0); } /*XXX confusing: some branches return immediately, others end up here*/ return(1); /* Come back immediatly to new state */ } static int retrier(fdcu) fdcu_t fdcu; { struct subdev *sd; fdc_p fdc = fdc_data + fdcu; register struct buf *bp; struct fd_data *fd; int fdu; bp = bufq_first(&fdc->head); 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; if (fdc->flags & FDC_STAT_VALID) { printf( " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", fdc->status[0], NE7_ST0BITS, fdc->status[1], NE7_ST1BITS, fdc->status[2], NE7_ST2BITS, fdc->status[3], fdc->status[4], fdc->status[5]); } else printf(" (No status)\n"); } bp->b_flags |= B_ERROR; bp->b_error = EIO; bp->b_resid += bp->b_bcount - fdc->fd->skip; bufq_remove(&fdc->head, bp); /* Tell devstat we have finished with the transaction */ devstat_end_transaction(&fd->device_stats, bp->b_bcount - bp->b_resid, DEVSTAT_TAG_NONE, (bp->b_flags & B_READ) ? DEVSTAT_READ : DEVSTAT_WRITE); fdc->fd->skip = 0; biodone(bp); fdc->state = FINDWORK; fdc->flags |= FDC_NEEDS_RESET; fdc->fd = (fd_p) 0; fdc->fdu = -1; 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; /* * keep the process from being swapped */ p->p_flag |= P_PHYSIO; bzero((void *)bp, sizeof(struct buf)); bp->b_flags = B_BUSY | B_PHYS | B_FORMAT; bp->b_proc = p; /* * 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_data = (caddr_t)finfo; /* now do the format */ bp->b_dev = dev; 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; biodone(bp); } if(bp->b_flags & B_ERROR) rv = bp->b_error; /* * allow the process to be swapped */ p->p_flag &= ~P_PHYSIO; free(bp, M_TEMP); return rv; } /* * TODO: don't allocate buffer on stack. */ static int fdioctl(dev, cmd, addr, flag, p) dev_t dev; u_long 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(dkmodpart(dev, RAW_PART), fdstrategy, dl) == 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, (u_long)0)) != 0) break; error = writedisklabel(dev, fdstrategy, (struct disklabel *)buffer); 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->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->ft = *(struct fd_type *)addr; break; case FD_GOPTS: /* get drive options */ *(int *)addr = fd->options; break; case FD_SOPTS: /* set drive options */ fd->options = *(int *)addr; break; default: error = ENOTTY; break; } return (error); } static fd_devsw_installed = 0; static void fd_drvinit(void *notused ) { if( ! fd_devsw_installed ) { cdevsw_add_generic(BDEV_MAJOR,CDEV_MAJOR, &fd_cdevsw); fd_devsw_installed = 1; } } SYSINIT(fddev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,fd_drvinit,NULL) #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: */