/* * 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. * * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu) * aided by the Linux floppy driver modifications from David Bateman * (dbateman@eng.uts.edu.au). * * 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) * * Copyright (c) 2001 Joerg Wunsch, * 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 * $FreeBSD: src/sys/isa/fd.c,v 1.176.2.8 2002/05/15 21:56:14 joerg Exp $ * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.33 2006/09/10 01:26:33 dillon Exp $ * */ #include "opt_fdc.h" #include "use_pccard.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "fdreg.h" #include "fdc.h" #include /* configuration flags */ #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */ #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ /* internally used only, not really from CMOS: */ #define RTCFDT_144M_PRETENDED 0x1000 /* error returns for fd_cmd() */ #define FD_FAILED -1 #define FD_NOT_VALID -2 #define FDC_ERRMAX 100 /* do not log more */ /* * Stop retrying after this many DMA overruns. Since each retry takes * one revolution, with 300 rpm., 25 retries take approximately 10 * seconds which the read attempt will block in case the DMA overrun * is persistent. */ #define FDC_DMAOV_MAX 25 /* * Timeout value for the PIO loops to wait until the FDC main status * register matches our expectations (request for master, direction * bit). This is supposed to be a number of microseconds, although * timing might actually not be very accurate. * * Timeouts of 100 msec are believed to be required for some broken * (old) hardware. */ #define FDSTS_TIMEOUT 100000 #define NUMTYPES 17 #define NUMDENS (NUMTYPES - 7) /* 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_640 9 #define FD_1232 10 #define FD_1480in5_25 11 #define FD_1440in5_25 12 #define FD_820in5_25 13 #define FD_800in5_25 14 #define FD_720in5_25 15 #define FD_360in5_25 16 #define FD_640in5_25 17 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 */ { 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */ { 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 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 */ { 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */ }; #define DRVS_PER_CTLR 2 /* 2 floppies */ /***********************************************************************\ * Per controller structure. * \***********************************************************************/ devclass_t fdc_devclass; /***********************************************************************\ * 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; #define FD_NO_TRACK -2 int track; /* where we think the head is */ int options; /* user configurable options, see ioctl_fd.h */ struct callout toffhandle; struct callout tohandle; struct callout motor; struct devstat device_stats; device_t dev; fdu_t fdu; }; struct fdc_ivars { int fdunit; }; static devclass_t fd_devclass; /***********************************************************************\ * 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) * \***********************************************************************/ /* internal functions */ static void fdc_intr(void *); static void set_motor(struct fdc_data *, int, int); # define TURNON 1 # define TURNOFF 0 static timeout_t fd_turnoff; static timeout_t fd_motor_on; static void fd_turnon(struct fd_data *); static void fdc_reset(fdc_p); static int fd_in(struct fdc_data *, int *); static int out_fdc(struct fdc_data *, int); static void fdstart(struct fdc_data *); static timeout_t fd_iotimeout; static timeout_t fd_pseudointr; static int fdstate(struct fdc_data *); static int retrier(struct fdc_data *); static int fdformat(cdev_t, struct fd_formb *, struct ucred *); 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 #define PIOREAD 13 #ifdef FDC_DEBUG static char const * const fdstates[] = { "DEVIDLE", "FINDWORK", "DOSEEK", "SEEKCOMPLETE", "IOCOMPLETE", "RECALCOMPLETE", "STARTRECAL", "RESETCTLR", "SEEKWAIT", "RECALWAIT", "MOTORWAIT", "IOTIMEDOUT", "RESETCOMPLETE", "PIOREAD", }; /* 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 */ void fdout_wr(fdc_p fdc, u_int8_t v) { bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); } static u_int8_t fdsts_rd(fdc_p fdc) { return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); } static void fddata_wr(fdc_p fdc, u_int8_t v) { bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); } static u_int8_t fddata_rd(fdc_p fdc) { return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); } static void fdctl_wr_isa(fdc_p fdc, u_int8_t v) { bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); } #if 0 static u_int8_t fdin_rd(fdc_p fdc) { return bus_space_read_1(fdc->portt, fdc->porth, FDIN); } #endif static d_open_t Fdopen; /* NOTE, not fdopen */ static d_close_t fdclose; static d_ioctl_t fdioctl; static d_strategy_t fdstrategy; static struct dev_ops fd_ops = { { "fd", FD_CDEV_MAJOR, D_DISK }, .d_open = Fdopen, .d_close = fdclose, .d_read = physread, .d_write = physwrite, .d_ioctl = fdioctl, .d_strategy = fdstrategy, }; static int fdc_err(struct fdc_data *fdc, const char *s) { fdc->fdc_errs++; if (s) { if (fdc->fdc_errs < FDC_ERRMAX) device_printf(fdc->fdc_dev, "%s", s); else if (fdc->fdc_errs == FDC_ERRMAX) device_printf(fdc->fdc_dev, "too many errors, not " "logging any more\n"); } 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 ... */ int fd_cmd(struct fdc_data *fdc, 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(fdc, __va_arg(ap, int)) < 0) { char msg[50]; snprintf(msg, sizeof(msg), "cmd %x failed at out byte %d of %d\n", cmd, n + 1, n_out); return fdc_err(fdc, msg); } } n_in = __va_arg(ap, int); for (n = 0; n < n_in; n++) { int *ptr = __va_arg(ap, int *); if (fd_in(fdc, ptr) < 0) { char msg[50]; snprintf(msg, sizeof(msg), "cmd %02x failed at in byte %d of %d\n", cmd, n + 1, n_in); return fdc_err(fdc, 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, I8207X_CONFIGURE) < 0) return fdc_err(fdc, "Enable FIFO failed\n"); /* If command is invalid, return */ j = FDSTS_TIMEOUT; while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) != NE7_RQM && j-- > 0) { if (i == (NE7_DIO | NE7_RQM)) { fdc_reset(fdc); return FD_FAILED; } DELAY(1); } if (j<0 || fd_cmd(fdc, 3, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { fdc_reset(fdc); return fdc_err(fdc, "Enable FIFO failed\n"); } fdc->flags |= FDC_HAS_FIFO; return 0; } if (fd_cmd(fdc, 4, I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) return fdc_err(fdc, "Re-enable FIFO failed\n"); return 0; } static int fd_sense_drive_status(fdc_p fdc, int *st3p) { int st3; if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) { return fdc_err(fdc, "Sense Drive Status failed\n"); } if (st3p) *st3p = st3; return 0; } static int fd_sense_int(fdc_p fdc, int *st0p, int *cylp) { int cyl, st0, ret; ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); if (ret) { (void)fdc_err(fdc, "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, &cyl) < 0) { return fdc_err(fdc, "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, &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 */ /****************************************************************************/ int fdc_alloc_resources(struct fdc_data *fdc) { device_t dev; int ispnp, ispcmcia; dev = fdc->fdc_dev; ispnp = (fdc->flags & FDC_ISPNP) != 0; ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; /* * On standard ISA, we don't just use an 8 port range * (e.g. 0x3f0-0x3f7) since that covers an IDE control * register at 0x3f6. * * Isn't PC hardware wonderful. * * The Y-E Data PCMCIA FDC doesn't have this problem, it * uses the register with offset 6 for pseudo-DMA, and the * one with offset 7 as control register. */ fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, &fdc->rid_ioport, 0ul, ~0ul, ispcmcia ? 8 : (ispnp ? 1 : 6), RF_ACTIVE); if (fdc->res_ioport == 0) { device_printf(dev, "cannot reserve I/O port range\n"); return ENXIO; } fdc->portt = rman_get_bustag(fdc->res_ioport); fdc->porth = rman_get_bushandle(fdc->res_ioport); if (!ispcmcia) { /* * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 * and some at 0x3f0-0x3f5,0x3f7. We detect the former * by checking the size and adjust the port address * accordingly. */ if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) fdc->port_off = -2; /* * Register the control port range as rid 1 if it * isn't there already. Most PnP BIOSen will have * already done this but non-PnP configurations don't. * * And some (!!) report 0x3f2-0x3f5 and completely * leave out the control register! It seems that some * non-antique controller chips have a different * method of programming the transfer speed which * doesn't require the control register, but it's * mighty bogus as the chip still responds to the * address for the control register. */ if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { u_long ctlstart; /* Find the control port, usually 0x3f7 */ ctlstart = rman_get_start(fdc->res_ioport) + fdc->port_off + 7; bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); } /* * Now (finally!) allocate the control port. */ fdc->rid_ctl = 1; fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, &fdc->rid_ctl, 0ul, ~0ul, 1, RF_ACTIVE); if (fdc->res_ctl == 0) { device_printf(dev, "cannot reserve control I/O port range\n"); return ENXIO; } fdc->ctlt = rman_get_bustag(fdc->res_ctl); fdc->ctlh = rman_get_bushandle(fdc->res_ctl); } fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &fdc->rid_irq, 0ul, ~0ul, 1, RF_ACTIVE); if (fdc->res_irq == 0) { device_printf(dev, "cannot reserve interrupt line\n"); return ENXIO; } if ((fdc->flags & FDC_NODMA) == 0) { fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, &fdc->rid_drq, 0ul, ~0ul, 1, RF_ACTIVE); if (fdc->res_drq == 0) { device_printf(dev, "cannot reserve DMA request line\n"); return ENXIO; } fdc->dmachan = fdc->res_drq->r_start; } return 0; } void fdc_release_resources(struct fdc_data *fdc) { device_t dev; dev = fdc->fdc_dev; if (fdc->res_irq != 0) { bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, fdc->res_irq); bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, fdc->res_irq); } if (fdc->res_ctl != 0) { bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, fdc->res_ctl); bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, fdc->res_ctl); } if (fdc->res_ioport != 0) { bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, fdc->res_ioport); bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, fdc->res_ioport); } if (fdc->res_drq != 0) { bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, fdc->res_drq); bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, fdc->res_drq); } } /****************************************************************************/ /* autoconfiguration stuff */ /****************************************************************************/ static struct isa_pnp_id fdc_ids[] = { {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ {0} }; int fdc_read_ivar(device_t dev, device_t child, int which, u_long *result) { struct fdc_ivars *ivars = device_get_ivars(child); switch (which) { case FDC_IVAR_FDUNIT: *result = ivars->fdunit; break; default: return ENOENT; } return 0; } /* * fdc controller section. */ static int fdc_probe(device_t dev) { int error, ic_type; struct fdc_data *fdc; fdc = device_get_softc(dev); bzero(fdc, sizeof *fdc); fdc->fdc_dev = dev; fdc->fdctl_wr = fdctl_wr_isa; /* Check pnp ids */ error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); if (error == ENXIO) return ENXIO; if (error == 0) fdc->flags |= FDC_ISPNP; /* Attempt to allocate our resources for the duration of the probe */ error = fdc_alloc_resources(fdc); if (error) goto out; /* First - lets reset the floppy controller */ fdout_wr(fdc, 0); DELAY(100); fdout_wr(fdc, FDO_FRST); /* see if it can handle a command */ if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 0)) { error = ENXIO; goto out; } if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { ic_type = (u_char)ic_type; switch (ic_type) { case 0x80: device_set_desc(dev, "NEC 765 or clone"); fdc->fdct = FDC_NE765; break; case 0x81: device_set_desc(dev, "Intel 82077 or clone"); fdc->fdct = FDC_I82077; break; case 0x90: device_set_desc(dev, "NEC 72065B or clone"); fdc->fdct = FDC_NE72065; break; default: device_set_desc(dev, "generic floppy controller"); fdc->fdct = FDC_UNKNOWN; break; } } out: fdc_release_resources(fdc); return (error); } /* * Add a child device to the fdc controller. It will then be probed etc. */ static void fdc_add_child(device_t dev, const char *name, int unit) { int disabled; struct fdc_ivars *ivar; device_t child; ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO); if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) ivar->fdunit = 0; child = device_add_child(dev, name, unit); if (child == NULL) return; device_set_ivars(child, ivar); if (resource_int_value(name, unit, "disabled", &disabled) == 0 && disabled != 0) device_disable(child); } int fdc_attach(device_t dev) { struct fdc_data *fdc; int i, error; fdc = device_get_softc(dev); callout_init(&fdc->pseudointr_ch); error = fdc_alloc_resources(fdc); if (error) { device_printf(dev, "cannot re-aquire resources\n"); return error; } error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 0, fdc_intr, fdc, &fdc->fdc_intr, NULL); if (error) { device_printf(dev, "cannot setup interrupt\n"); return error; } fdc->fdcu = device_get_unit(dev); fdc->flags |= FDC_ATTACHED; if ((fdc->flags & FDC_NODMA) == 0) { /* Acquire the DMA channel forever, The driver will do the rest */ /* XXX should integrate with rman */ 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 */ fdout_wr(fdc, ((fdc->fdout = 0))); bioq_init(&fdc->bio_queue); /* * Probe and attach any children. We should probably detect * devices from the BIOS unless overridden. */ for (i = resource_query_string(-1, "at", device_get_nameunit(dev)); i != -1; i = resource_query_string(i, "at", device_get_nameunit(dev))) fdc_add_child(dev, resource_query_name(i), resource_query_unit(i)); return (bus_generic_attach(dev)); } int fdc_print_child(device_t me, device_t child) { int retval = 0; retval += bus_print_child_header(me, child); retval += printf(" on %s drive %d\n", device_get_nameunit(me), fdc_get_fdunit(child)); return (retval); } static device_method_t fdc_methods[] = { /* Device interface */ DEVMETHOD(device_probe, fdc_probe), DEVMETHOD(device_attach, fdc_attach), DEVMETHOD(device_detach, bus_generic_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, bus_generic_suspend), DEVMETHOD(device_resume, bus_generic_resume), /* Bus interface */ DEVMETHOD(bus_print_child, fdc_print_child), DEVMETHOD(bus_read_ivar, fdc_read_ivar), /* Our children never use any other bus interface methods. */ { 0, 0 } }; static driver_t fdc_driver = { "fdc", fdc_methods, sizeof(struct fdc_data) }; DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); /******************************************************************/ /* * devices attached to the controller section. */ static int fd_probe(device_t dev) { int i; u_int fdt, st0, st3; struct fd_data *fd; struct fdc_data *fdc; fdsu_t fdsu; static int fd_fifo = 0; fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ fd = device_get_softc(dev); fdc = device_get_softc(device_get_parent(dev)); bzero(fd, sizeof *fd); fd->dev = dev; fd->fdc = fdc; fd->fdsu = fdsu; fd->fdu = device_get_unit(dev); #ifdef __i386__ /* look up what bios thinks we have */ switch (fd->fdu) { case 0: if ((fdc->flags & FDC_ISPCMCIA)) fdt = RTCFDT_144M; else if (device_get_flags(fdc->fdc_dev) & 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; } #else fdt = RTCFDT_144M; /* XXX probably */ #endif /* is there a unit? */ if (fdt == RTCFDT_NONE) return (ENXIO); /* select it */ set_motor(fdc, fdsu, TURNON); DELAY(1000000); /* 1 sec */ /* XXX This doesn't work before the first set_motor() */ if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 && enable_fifo(fdc) == 0) { device_printf(device_get_parent(dev), "FIFO enabled, %d bytes threshold\n", fifo_threshold); } fd_fifo = 1; if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) && (st3 & NE7_ST3_T0)) { /* if at track 0, first seek inwards */ /* seek some steps: */ fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0); DELAY(300000); /* ...wait a moment... */ 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(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { /* ...wait a moment... */ DELAY(300000); /* make ctrlr happy: */ 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(fdc, 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(fdc, fdsu, TURNOFF); if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */ return (ENXIO); fd->track = FD_NO_TRACK; fd->fdc = fdc; fd->fdsu = fdsu; fd->options = 0; callout_init(&fd->toffhandle); callout_init(&fd->tohandle); callout_init(&fd->motor); switch (fdt) { case RTCFDT_12M: device_set_desc(dev, "1200-KB 5.25\" drive"); fd->type = FD_1200; break; case RTCFDT_144M | RTCFDT_144M_PRETENDED: device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive"); fdt = RTCFDT_144M; fd->type = FD_1440; case RTCFDT_144M: device_set_desc(dev, "1440-KB 3.5\" drive"); fd->type = FD_1440; break; case RTCFDT_288M: case RTCFDT_288M_1: device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); fd->type = FD_1440; break; case RTCFDT_360K: device_set_desc(dev, "360-KB 5.25\" drive"); fd->type = FD_360; break; case RTCFDT_720K: printf("720-KB 3.5\" drive"); fd->type = FD_720; break; default: return (ENXIO); } return (0); } static int fd_attach(device_t dev) { struct fd_data *fd; #if 0 int i; int mynor; int typemynor; int typesize; #endif fd = device_get_softc(dev); dev_ops_add(&fd_ops, -1 << 6, fd->fdu << 6); make_dev(&fd_ops, (fd->fdu << 6), UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu); #if 0 /* Other make_dev() go here. */ #endif /* * Export the drive to the devstat interface. */ devstat_add_entry(&fd->device_stats, device_get_name(dev), device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS, DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, DEVSTAT_PRIORITY_FD); return (0); } static int fd_detach(device_t dev) { struct fd_data *fd; fd = device_get_softc(dev); callout_stop(&fd->toffhandle); callout_stop(&fd->motor); return (0); } static device_method_t fd_methods[] = { /* Device interface */ DEVMETHOD(device_probe, fd_probe), DEVMETHOD(device_attach, fd_attach), DEVMETHOD(device_detach, fd_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ { 0, 0 } }; static driver_t fd_driver = { "fd", fd_methods, sizeof(struct fd_data) }; DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); /****************************************************************************/ /* motor control stuff */ /* remember to not deselect the drive we're working on */ /****************************************************************************/ static void set_motor(struct fdc_data *fdc, int fdsu, int turnon) { int fdout = fdc->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); } fdout_wr(fdc, fdout); fdc->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(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 0); if (fdc->flags & FDC_HAS_FIFO) (void) enable_fifo(fdc); } } static void fd_turnoff(void *xfd) { fd_p fd = xfd; TRACE1("[fd%d: turnoff]", fd->fdu); crit_enter(); /* * Don't turn off the motor yet if the drive is active. * * If we got here, this could only mean we missed an interrupt. * This can e. g. happen on the Y-E Date PCMCIA floppy controller * after a controller reset. Just schedule a pseudo-interrupt * so the state machine gets re-entered. */ if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { fdc_intr(fd->fdc); crit_exit(); return; } fd->flags &= ~FD_MOTOR; set_motor(fd->fdc, fd->fdsu, TURNOFF); crit_exit(); } static void fd_motor_on(void *xfd) { fd_p fd = xfd; crit_enter(); fd->flags &= ~FD_MOTOR_WAIT; if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) { fdc_intr(fd->fdc); } crit_exit(); } static void fd_turnon(fd_p fd) { if(!(fd->flags & FD_MOTOR)) { fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); set_motor(fd->fdc, fd->fdsu, TURNON); callout_reset(&fd->motor, hz, fd_motor_on, fd); } } static void fdc_reset(fdc_p fdc) { /* Try a reset, keep motor on */ fdout_wr(fdc, 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 */ fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); DELAY(100); fdout_wr(fdc, fdc->fdout); TRACE1("[0x%x->FDOUT]", fdc->fdout); /* XXX after a reset, silently believe the FDC will accept commands */ (void)fd_cmd(fdc, 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 */ /****************************************************************************/ /* * FDC IO functions, take care of the main status register, timeout * in case the desired status bits are never set. * * These PIO loops initially start out with short delays between * each iteration in the expectation that the required condition * is usually met quickly, so it can be handled immediately. After * about 1 ms, stepping is increased to achieve a better timing * accuracy in the calls to DELAY(). */ static int fd_in(struct fdc_data *fdc, int *ptr) { int i, j, step; for (j = 0, step = 1; (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) && j < FDSTS_TIMEOUT; j += step) { if (i == NE7_RQM) return (fdc_err(fdc, "ready for output in input\n")); if (j == 1000) step = 1000; DELAY(step); } if (j >= FDSTS_TIMEOUT) return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); #ifdef FDC_DEBUG i = fddata_rd(fdc); TRACE1("[FDDATA->0x%x]", (unsigned char)i); *ptr = i; return (0); #else /* !FDC_DEBUG */ i = fddata_rd(fdc); if (ptr) *ptr = i; return (0); #endif /* FDC_DEBUG */ } static int out_fdc(struct fdc_data *fdc, int x) { int i, j, step; for (j = 0, step = 1; (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM && j < FDSTS_TIMEOUT; j += step) { if (i == (NE7_DIO|NE7_RQM)) return (fdc_err(fdc, "ready for input in output\n")); if (j == 1000) step = 1000; DELAY(step); } if (j >= FDSTS_TIMEOUT) return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); /* Send the command and return */ fddata_wr(fdc, x); TRACE1("[0x%x->FDDATA]", x); return (0); } /****************************************************************************/ /* fdopen/fdclose */ /****************************************************************************/ int Fdopen(struct dev_open_args *ap) { cdev_t dev = ap->a_head.a_dev; fdu_t fdu = FDUNIT(minor(dev)); int type = FDTYPE(minor(dev)); fd_p fd; fdc_p fdc; /* check bounds */ if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) return (ENXIO); fdc = fd->fdc; if ((fdc == NULL) || (fd->type == NO_TYPE)) return (ENXIO); if (type > NUMDENS) return (ENXIO); if (type == 0) type = fd->type; else { /* * For each type of basic drive, make sure we are trying * to open a type it can do, */ if (type != fd->type) { switch (fd->type) { case FD_360: return (ENXIO); case FD_720: if ( type != FD_820 && type != FD_800 && type != FD_640 ) 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_1232: 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_640: type = FD_640in5_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 && type != FD_640 ) return(ENXIO); break; } } } fd->ft = fd_types + type - 1; fd->flags |= FD_OPEN; /* * Clearing the DMA overrun counter at open time is a bit messy. * Since we're only managing one counter per controller, opening * the second drive could mess it up. Anyway, if the DMA overrun * condition is really persistent, it will eventually time out * still. OTOH, clearing it here will ensure we'll at least start * trying again after a previous (maybe even long ago) failure. * Also, this is merely a stop-gap measure only that should not * happen during normal operation, so we can tolerate it to be a * bit sloppy about this. */ fdc->dma_overruns = 0; return 0; } int fdclose(struct dev_close_args *ap) { cdev_t dev = ap->a_head.a_dev; fdu_t fdu = FDUNIT(minor(dev)); struct fd_data *fd; fd = devclass_get_softc(fd_devclass, fdu); fd->flags &= ~FD_OPEN; fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG); return (0); } /****************************************************************************/ /* fdstrategy */ /****************************************************************************/ int fdstrategy(struct dev_strategy_args *ap) { cdev_t dev = ap->a_head.a_dev; struct bio *bio = ap->a_bio; struct buf *bp = bio->bio_buf; unsigned nblocks, blknum, cando; fdu_t fdu; fdc_p fdc; fd_p fd; size_t fdblk; fdu = FDUNIT(minor(dev)); fd = devclass_get_softc(fd_devclass, fdu); if (fd == 0) panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", (u_long)major(dev), (u_long)minor(dev)); fdc = fd->fdc; if (fd->type == NO_TYPE) { bp->b_error = ENXIO; bp->b_flags |= B_ERROR; goto bad; }; fdblk = 128 << (fd->ft->secsize); if (bp->b_cmd != BUF_CMD_FORMAT) { if (bio->bio_offset < 0) { printf( "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n", fdu, bio->bio_offset, 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 (bio->bio_offset > 20000000LL * fdblk) { /* * Reject unreasonably high block number, prevent the * multiplication below from overflowing. */ bp->b_error = EINVAL; bp->b_flags |= B_ERROR; goto bad; } blknum = (unsigned)(bio->bio_offset / 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; } } crit_enter(); bio->bio_driver_info = dev; bioqdisksort(&fdc->bio_queue, bio); callout_stop(&fd->toffhandle); /* Tell devstat we are starting on the transaction */ devstat_start_transaction(&fd->device_stats); device_busy(fd->dev); fdstart(fdc); crit_exit(); return(0); bad: biodone(bio); 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 * \***************************************************************/ static void fdstart(struct fdc_data *fdc) { crit_enter(); if(fdc->state == DEVIDLE) { fdc_intr(fdc); } crit_exit(); } static void fd_iotimeout(void *xfdc) { fdc_p fdc; fdc = xfdc; 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. */ crit_enter(); fdc->status[0] = NE7_ST0_IC_IV; fdc->flags &= ~FDC_STAT_VALID; fdc->state = IOTIMEDOUT; fdc_intr(fdc); crit_exit(); } /* just ensure it is running in a critical section */ static void fd_pseudointr(void *xfdc) { crit_enter(); fdc_intr(xfdc); crit_exit(); } /***********************************************************************\ * fdintr * * keep calling the state machine until it returns a 0 * * ALWAYS called at SPLBIO * \***********************************************************************/ static void fdc_intr(void *xfdc) { fdc_p fdc = xfdc; while(fdstate(fdc)) ; } /* * magic pseudo-DMA initialization for YE FDC. Sets count and * direction */ #define SET_BCDR(fdc,wr,cnt,port) \ bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ ((cnt)-1) & 0xff); \ bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); /* * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy */ static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count) { u_char *cptr = (u_char *)addr; if (cmd == BUF_CMD_READ) { if (fdc->state != PIOREAD) { fdc->state = PIOREAD; return(0); }; SET_BCDR(fdc, 0, count, 0); bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + FDC_YE_DATAPORT, cptr, count); } else { bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + FDC_YE_DATAPORT, cptr, count); SET_BCDR(fdc, 0, count, 0); }; return(1); } /***********************************************************************\ * The controller state machine. * * if it returns a non zero value, it should be called again immediatly * \***********************************************************************/ static int fdstate(fdc_p fdc) { 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; struct bio *bio; struct buf *bp; struct fd_formb *finfo = NULL; size_t fdblk; cdev_t dev; bio = fdc->bio; if (bio == NULL) { bio = bioq_first(&fdc->bio_queue); if (bio != NULL) { bioq_remove(&fdc->bio_queue, bio); fdc->bio = bio; } } if (bio == NULL) { /***********************************************\ * nothing left for this controller to do * * Force into the IDLE state, * \***********************************************/ fdc->state = DEVIDLE; if (fdc->fd) { device_printf(fdc->fdc_dev, "unexpected valid fd pointer\n"); fdc->fd = (fd_p) 0; fdc->fdu = -1; } TRACE1("[fdc%d IDLE]", fdc->fdcu); return (0); } bp = bio->bio_buf; dev = bio->bio_driver_info; fdu = FDUNIT(minor(dev)); fd = devclass_get_softc(fd_devclass, fdu); fdblk = 128 << fd->ft->secsize; if (fdc->fd && (fd != fdc->fd)) device_printf(fd->dev, "confused fd pointers\n"); read = (bp->b_cmd == BUF_CMD_READ); format = (bp->b_cmd == BUF_CMD_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)(bio->bio_offset / 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); callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd); switch (fdc->state) { case DEVIDLE: case FINDWORK: /* we have found new work */ fdc->retry = 0; fd->skip = 0; fdc->fd = fd; fdc->fdu = fdu; fdc->fdctl_wr(fdc, 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(fd); return (0); } else /* at least make sure we are selected */ { set_motor(fdc, 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(fdc, 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(fdc)); } fd->track = FD_NO_TRACK; fdc->state = SEEKWAIT; return(0); /* will return later */ case SEEKWAIT: /* allow heads to settle */ callout_reset(&fdc->pseudointr_ch, hz / 16, fd_pseudointr, fdc); 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(fdc)); } } 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(fdc)); } } fd->track = b_cylinder; if (!(fdc->flags & FDC_NODMA)) { isa_dmastart(isa_dmabp(bp), 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? */ if (!(fdc->flags & FDC_NODMA)) isa_dmadone(isa_dmabp(bp), bp->b_data + fd->skip, format ? bp->b_bcount : fdblk, fdc->dmachan); fdc->retry = 6; /* reset the beast */ return (retrier(fdc)); } 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) { if (fdc->flags & FDC_NODMA) { /* * This seems to be necessary for * whatever obscure reason; if we omit * it, we end up filling the sector ID * fields of the newly formatted track * entirely with garbage, causing * `wrong cylinder' errors all over * the place when trying to read them * back. * * Umpf. */ SET_BCDR(fdc, 1, bp->b_bcount, 0); (void)fdcpio(fdc,bp->b_cmd, bp->b_data+fd->skip, bp->b_bcount); } /* formatting */ if(fd_cmd(fdc, 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 */ if (!(fdc->flags & FDC_NODMA)) isa_dmadone(isa_dmabp(bp), bp->b_data + fd->skip, format ? bp->b_bcount : fdblk, fdc->dmachan); fdc->retry = 6; return (retrier(fdc)); } } else { if (fdc->flags & FDC_NODMA) { /* * this seems to be necessary even when * reading data */ SET_BCDR(fdc, 1, fdblk, 0); /* * perform the write pseudo-DMA before * the WRITE command is sent */ if (!read) (void)fdcpio(fdc,bp->b_cmd, bp->b_data+fd->skip, fdblk); } if (fd_cmd(fdc, 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 */ if (!(fdc->flags & FDC_NODMA)) isa_dmadone(isa_dmabp(bp), bp->b_data + fd->skip, format ? bp->b_bcount : fdblk, fdc->dmachan); fdc->retry = 6; return (retrier(fdc)); } } if (fdc->flags & FDC_NODMA) /* * if this is a read, then simply await interrupt * before performing PIO */ if (read && !fdcpio(fdc,bp->b_cmd, bp->b_data+fd->skip,fdblk)) { callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc); return(0); /* will return later */ }; /* * write (or format) operation will fall through and * await completion interrupt */ fdc->state = IOCOMPLETE; callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc); return (0); /* will return later */ case PIOREAD: /* * actually perform the PIO read. The IOCOMPLETE case * removes the timeout for us. */ (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk); fdc->state = IOCOMPLETE; /* FALLTHROUGH */ case IOCOMPLETE: /* IO DONE, post-analyze */ callout_stop(&fd->tohandle); if (fd_read_status(fdc, fd->fdsu)) { if (!(fdc->flags & FDC_NODMA)) { isa_dmadone(isa_dmabp(bp), bp->b_data + fd->skip, format ? bp->b_bcount : fdblk, fdc->dmachan); } if (fdc->retry < 6) fdc->retry = 6; /* force a reset */ return (retrier(fdc)); } fdc->state = IOTIMEDOUT; /* FALLTHROUGH */ case IOTIMEDOUT: if (!(fdc->flags & FDC_NODMA)) { isa_dmadone(isa_dmabp(bp), 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. * * We normally restart this without bumping * the retry counter. However, in case * something is seriously messed up (like * broken hardware), we rather limit the * number of retries so the IO operation * doesn't block indefinately. */ if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { fdc->state = SEEKCOMPLETE; return (1); } /* else fall through */ } 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(fdc)); } /* All OK */ /* Operation successful, retry DMA overruns again next time. */ fdc->dma_overruns = 0; 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; fdc->bio = NULL; device_unbusy(fd->dev); devstat_end_transaction_buf(&fd->device_stats, bp); biodone(bio); 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(fdc, 2, NE7CMD_RECAL, fdu, 0)) { /* arrgl */ fdc->retry = 6; return (retrier(fdc)); } fdc->state = RECALWAIT; return (0); /* will return later */ case RECALWAIT: /* allow heads to settle */ callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc); 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(fdc)); } 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. * But first, discard the results of the reset. */ fdc->state = RESETCOMPLETE; } return (1); /* will return immediatly */ default: device_printf(fdc->fdc_dev, "unexpected FD int->"); 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(struct fdc_data *fdc) { struct bio *bio; struct buf *bp; struct fd_data *fd; cdev_t dev; int fdu; bio = fdc->bio; bp = bio->bio_buf; dev = bio->bio_driver_info; /* XXX shouldn't this be cached somewhere? */ fdu = FDUNIT(minor(dev)); fd = devclass_get_softc(fd_devclass, fdu); if (fd->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: { int printerror = (fd->options & FDOPT_NOERRLOG) == 0; if (printerror) { /* * note: use the correct device for more * verbose error reporting. */ cdev_t subdev; subdev = make_sub_dev(dev, (FDUNIT(minor(dev))<<3)|RAW_PART); diskerr(bio, subdev, "hard error", LOG_PRINTF, fdc->fd->skip, NULL); } if (printerror) { 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; fdc->bio = NULL; fdc->fd->skip = 0; device_unbusy(fd->dev); devstat_end_transaction_buf(&fdc->fd->device_stats, bp); biodone(bio); fdc->state = FINDWORK; fdc->flags |= FDC_NEEDS_RESET; fdc->fd = (fd_p) 0; fdc->fdu = -1; return (1); } fdc->retry++; return (1); } static void fdformat_wakeup(struct bio *bio) { bio->bio_buf->b_cmd = BUF_CMD_DONE; wakeup(bio); } static int fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred) { fdu_t fdu; fd_p fd; struct buf *bp; int rv = 0; size_t fdblk; fdu = FDUNIT(minor(dev)); fd = devclass_get_softc(fd_devclass, fdu); fdblk = 128 << fd->ft->secsize; /* set up a buffer header for fdstrategy() */ bp = getpbuf(NULL); bp->b_cmd = BUF_CMD_FORMAT; /* * calculate a fake blkno, so fdstrategy() would initiate a * seek to the requested cylinder */ bp->b_bio1.bio_offset = (off_t)(finfo->cyl * (fd->ft->sectrac * fd->ft->heads) + finfo->head * fd->ft->sectrac) * fdblk; bp->b_bio1.bio_driver_info = dev; bp->b_bio1.bio_done = fdformat_wakeup; bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; bp->b_data = (caddr_t)finfo; /* now do the format */ dev_dstrategy(dev, &bp->b_bio1); /* ...and wait for it to complete */ crit_enter(); while (bp->b_cmd != BUF_CMD_DONE) { rv = tsleep(&bp->b_bio1, 0, "fdform", 20 * hz); if (rv == EWOULDBLOCK) break; } crit_exit(); if (rv == EWOULDBLOCK) { /* timed out */ rv = EIO; device_unbusy(fd->dev); biodone(&bp->b_bio1); } if (bp->b_flags & B_ERROR) rv = bp->b_error; /* * allow the process to be swapped */ relpbuf(bp, NULL); return rv; } /* * TODO: don't allocate buffer on stack. */ static int fdioctl(struct dev_ioctl_args *ap) { cdev_t dev = ap->a_head.a_dev; fdu_t fdu = FDUNIT(minor(dev)); fd_p fd = devclass_get_softc(fd_devclass, fdu); size_t fdblk; struct fd_type *fdt; struct disklabel *dl; struct fdc_status *fsp; char buffer[DEV_BSIZE]; int error = 0; fdblk = 128 << fd->ft->secsize; switch (ap->a_cmd) { case DIOCGDINFO: bzero(buffer, sizeof (buffer)); dl = (struct disklabel *)buffer; dl->d_secsize = fdblk; fdt = fd->ft; dl->d_secpercyl = fdt->size / fdt->tracks; dl->d_type = DTYPE_FLOPPY; if (readdisklabel(dev, dl) == NULL) error = 0; else error = EINVAL; *(struct disklabel *)ap->a_data = *dl; break; case DIOCSDINFO: if ((ap->a_fflag & FWRITE) == 0) error = EBADF; break; case DIOCWLABEL: if ((ap->a_fflag & FWRITE) == 0) error = EBADF; break; case DIOCWDINFO: if ((ap->a_fflag & FWRITE) == 0) { error = EBADF; break; } dl = (struct disklabel *)ap->a_data; if ((error = setdisklabel((struct disklabel *)buffer, dl, (u_long)0)) != 0) break; error = writedisklabel(dev, (struct disklabel *)buffer); break; case FD_FORM: if ((ap->a_fflag & FWRITE) == 0) error = EBADF; /* must be opened for writing */ else if (((struct fd_formb *)ap->a_data)->format_version != FD_FORMAT_VERSION) error = EINVAL; /* wrong version of formatting prog */ else error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred); break; case FD_GTYPE: /* get drive type */ *(struct fd_type *)ap->a_data = *fd->ft; break; case FD_STYPE: /* set drive type */ /* this is considered harmful; only allow for superuser */ if (suser_cred(ap->a_cred, 0) != 0) return EPERM; *fd->ft = *(struct fd_type *)ap->a_data; break; case FD_GOPTS: /* get drive options */ *(int *)ap->a_data = fd->options; break; case FD_SOPTS: /* set drive options */ fd->options = *(int *)ap->a_data; break; case FD_GSTAT: fsp = (struct fdc_status *)ap->a_data; if ((fd->fdc->flags & FDC_STAT_VALID) == 0) return EINVAL; memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); break; default: error = ENOTTY; break; } return (error); } /* * 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: */