2 * Copyright (c) 2004 Poul-Henning Kamp
3 * Copyright (c) 1990 The Regents of the University of California.
6 * This code is derived from software contributed to Berkeley by
9 * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu)
10 * aided by the Linux floppy driver modifications from David Bateman
11 * (dbateman@eng.uts.edu.au).
13 * Copyright (c) 1993, 1994 by
14 * jc@irbs.UUCP (John Capo)
15 * vak@zebub.msk.su (Serge Vakulenko)
16 * ache@astral.msk.su (Andrew A. Chernov)
18 * Copyright (c) 1993, 1994, 1995 by
19 * joerg_wunsch@uriah.sax.de (Joerg Wunsch)
20 * dufault@hda.com (Peter Dufault)
22 * Copyright (c) 2001 Joerg Wunsch,
23 * joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
25 * Redistribution and use in source and binary forms, with or without
26 * modification, are permitted provided that the following conditions
28 * 1. Redistributions of source code must retain the above copyright
29 * notice, this list of conditions and the following disclaimer.
30 * 2. Redistributions in binary form must reproduce the above copyright
31 * notice, this list of conditions and the following disclaimer in the
32 * documentation and/or other materials provided with the distribution.
33 * 4. Neither the name of the University nor the names of its contributors
34 * may be used to endorse or promote products derived from this software
35 * without specific prior written permission.
37 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
38 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
40 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
41 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
42 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
43 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
45 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
46 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
49 * from: @(#)fd.c 7.4 (Berkeley) 5/25/91
53 #include <sys/cdefs.h>
54 __FBSDID("$FreeBSD$");
58 #include <sys/param.h>
61 #include <sys/devicestat.h>
63 #include <sys/fcntl.h>
64 #include <sys/fdcio.h>
65 #include <sys/filio.h>
66 #include <sys/kernel.h>
67 #include <sys/kthread.h>
69 #include <sys/malloc.h>
70 #include <sys/module.h>
71 #include <sys/mutex.h>
75 #include <sys/sysctl.h>
76 #include <sys/systm.h>
78 #include <geom/geom.h>
80 #include <machine/bus.h>
81 #include <machine/clock.h>
82 #include <machine/stdarg.h>
84 #include <isa/isavar.h>
85 #include <isa/isareg.h>
86 #include <dev/fdc/fdcvar.h>
89 #include <dev/ic/nec765.h>
92 * Runtime configuration hints/flags
95 /* configuration flags for fd */
96 #define FD_TYPEMASK 0x0f /* drive type, matches enum
97 * fd_drivetype; on i386 machines, if
98 * given as 0, use RTC type for fd0
100 #define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just
101 * assume it is there */
104 * Things that could conceiveably considered parameters or tweakables
108 * Maximal number of bytes in a cylinder.
109 * This is used for ISADMA bouncebuffer allocation and sets the max
110 * xfersize we support.
112 * 2.88M format has 2 x 36 x 512, allow for hacked up density.
114 #define MAX_BYTES_PER_CYL (2 * 40 * 512)
117 * Timeout value for the PIO loops to wait until the FDC main status
118 * register matches our expectations (request for master, direction
119 * bit). This is supposed to be a number of microseconds, although
120 * timing might actually not be very accurate.
122 * Timeouts of 100 msec are believed to be required for some broken
125 #define FDSTS_TIMEOUT 100000
128 * After this many errors, stop whining. Close will reset this count.
130 #define FDC_ERRMAX 100
133 * AutoDensity search lists for each drive type.
136 static struct fd_type fd_searchlist_360k[] = {
141 static struct fd_type fd_searchlist_12m[] = {
142 { FDF_5_1200 | FL_AUTO },
143 { FDF_5_360 | FL_2STEP | FL_AUTO},
147 static struct fd_type fd_searchlist_720k[] = {
152 static struct fd_type fd_searchlist_144m[] = {
153 { FDF_3_1440 | FL_AUTO},
154 { FDF_3_720 | FL_AUTO},
158 static struct fd_type fd_searchlist_288m[] = {
159 { FDF_3_1440 | FL_AUTO },
161 { FDF_3_2880 | FL_AUTO }, /* XXX: probably doesn't work */
163 { FDF_3_720 | FL_AUTO},
168 * Order must match enum fd_drivetype in <sys/fdcio.h>.
170 static struct fd_type *fd_native_types[] = {
172 fd_searchlist_360k, /* FDT_360K */
173 fd_searchlist_12m, /* FDT_12M */
174 fd_searchlist_720k, /* FDT_720K */
175 fd_searchlist_144m, /* FDT_144M */
176 fd_searchlist_288m, /* FDT_288M_1 (mapped to FDT_288M) */
177 fd_searchlist_288m, /* FDT_288M */
181 * Internals start here
185 #define FDOUT 2 /* Digital Output Register (W) */
186 #define FDO_FDSEL 0x03 /* floppy device select */
187 #define FDO_FRST 0x04 /* floppy controller reset */
188 #define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */
189 #define FDO_MOEN0 0x10 /* motor enable drive 0 */
190 #define FDO_MOEN1 0x20 /* motor enable drive 1 */
191 #define FDO_MOEN2 0x40 /* motor enable drive 2 */
192 #define FDO_MOEN3 0x80 /* motor enable drive 3 */
194 #define FDSTS 4 /* NEC 765 Main Status Register (R) */
195 #define FDDSR 4 /* Data Rate Select Register (W) */
196 #define FDDATA 5 /* NEC 765 Data Register (R/W) */
197 #define FDCTL 7 /* Control Register (W) */
200 * The YE-DATA PC Card floppies use PIO to read in the data rather
201 * than DMA due to the wild variability of DMA for the PC Card
202 * devices. DMA was deleted from the PC Card specification in version
203 * 7.2 of the standard, but that post-dates the YE-DATA devices by many
206 * In addition, if we cannot setup the DMA resources for the ISA
207 * attachment, we'll use this same offset for data transfer. However,
208 * that almost certainly won't work.
210 * For this mode, offset 0 and 1 must be used to setup the transfer
211 * for this floppy. This is OK for PC Card YE Data devices, but for
212 * ISA this is likely wrong. These registers are only available on
213 * those systems that map them to the floppy drive. Newer systems do
214 * not do this, and we should likely prohibit access to them (or
215 * disallow NODMA to be set).
217 #define FDBCDR 0 /* And 1 */
218 #define FD_YE_DATAPORT 6 /* Drive Data port */
220 #define FDI_DCHG 0x80 /* diskette has been changed */
221 /* requires drive and motor being selected */
222 /* is cleared by any step pulse to drive */
225 * We have three private BIO commands.
227 #define BIO_PROBE BIO_CMD0
228 #define BIO_RDID BIO_CMD1
229 #define BIO_FMT BIO_CMD2
232 * Per drive structure (softc).
235 u_char *fd_ioptr; /* IO pointer */
236 u_int fd_iosize; /* Size of IO chunks */
237 u_int fd_iocount; /* Outstanding requests */
238 struct fdc_data *fdc; /* pointer to controller structure */
239 int fdsu; /* this units number on this controller */
240 enum fd_drivetype type; /* drive type */
241 struct fd_type *ft; /* pointer to current type descriptor */
242 struct fd_type fts; /* type descriptors */
245 #define FD_WP (1<<0) /* Write protected */
246 #define FD_MOTOR (1<<1) /* motor should be on */
247 #define FD_MOTORWAIT (1<<2) /* motor should be on */
248 #define FD_EMPTY (1<<3) /* no media */
249 #define FD_NEWDISK (1<<4) /* media changed */
250 #define FD_ISADMA (1<<5) /* isa dma started */
251 int track; /* where we think the head is */
252 #define FD_NO_TRACK -2
253 int options; /* FDOPT_* */
254 struct callout toffhandle;
255 struct g_geom *fd_geom;
256 struct g_provider *fd_provider;
258 struct bio_queue_head fd_bq;
261 #define FD_NOT_VALID -2
263 static driver_intr_t fdc_intr;
264 static driver_filter_t fdc_intr_fast;
265 static void fdc_reset(struct fdc_data *);
267 SYSCTL_NODE(_debug, OID_AUTO, fdc, CTLFLAG_RW, 0, "fdc driver");
269 static int fifo_threshold = 8;
270 SYSCTL_INT(_debug_fdc, OID_AUTO, fifo, CTLFLAG_RW, &fifo_threshold, 0,
271 "FIFO threshold setting");
273 static int debugflags = 0;
274 SYSCTL_INT(_debug_fdc, OID_AUTO, debugflags, CTLFLAG_RW, &debugflags, 0,
277 static int retries = 10;
278 SYSCTL_INT(_debug_fdc, OID_AUTO, retries, CTLFLAG_RW, &retries, 0,
279 "Number of retries to attempt");
281 static int spec1 = 0xaf;
282 SYSCTL_INT(_debug_fdc, OID_AUTO, spec1, CTLFLAG_RW, &spec1, 0,
283 "Specification byte one (step-rate + head unload)");
285 static int spec2 = 0x10;
286 SYSCTL_INT(_debug_fdc, OID_AUTO, spec2, CTLFLAG_RW, &spec2, 0,
287 "Specification byte two (head load time + no-dma)");
290 SYSCTL_INT(_debug_fdc, OID_AUTO, settle, CTLFLAG_RW, &settle, 0,
291 "Head settling time in sec/hz");
294 fdprinttype(struct fd_type *ft)
297 printf("(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,0x%x)",
298 ft->sectrac, ft->secsize, ft->datalen, ft->gap, ft->tracks,
299 ft->size, ft->trans, ft->heads, ft->f_gap, ft->f_inter,
300 ft->offset_side2, ft->flags);
304 fdsettype(struct fd_data *fd, struct fd_type *ft)
307 ft->size = ft->sectrac * ft->heads * ft->tracks;
308 fd->sectorsize = 128 << fd->ft->secsize;
312 * Bus space handling (access to low-level IO).
315 fdregwr(struct fdc_data *fdc, int reg, uint8_t v)
318 bus_space_write_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg], v);
321 __inline static uint8_t
322 fdregrd(struct fdc_data *fdc, int reg)
325 return bus_space_read_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg]);
329 fdctl_wr(struct fdc_data *fdc, u_int8_t v)
332 fdregwr(fdc, FDCTL, v);
336 fdout_wr(struct fdc_data *fdc, u_int8_t v)
339 fdregwr(fdc, FDOUT, v);
343 fdsts_rd(struct fdc_data *fdc)
346 return fdregrd(fdc, FDSTS);
350 fddsr_wr(struct fdc_data *fdc, u_int8_t v)
353 fdregwr(fdc, FDDSR, v);
357 fddata_wr(struct fdc_data *fdc, u_int8_t v)
360 fdregwr(fdc, FDDATA, v);
364 fddata_rd(struct fdc_data *fdc)
367 return fdregrd(fdc, FDDATA);
371 fdin_rd(struct fdc_data *fdc)
374 return fdregrd(fdc, FDCTL);
378 * Magic pseudo-DMA initialization for YE FDC. Sets count and
382 fdbcdr_wr(struct fdc_data *fdc, int iswrite, uint16_t count)
384 fdregwr(fdc, FDBCDR, (count - 1) & 0xff);
385 fdregwr(fdc, FDBCDR + 1,
386 (iswrite ? 0x80 : 0) | (((count - 1) >> 8) & 0x7f));
390 fdc_err(struct fdc_data *fdc, const char *s)
394 if (fdc->fdc_errs < FDC_ERRMAX)
395 device_printf(fdc->fdc_dev, "%s", s);
396 else if (fdc->fdc_errs == FDC_ERRMAX)
397 device_printf(fdc->fdc_dev, "too many errors, not "
398 "logging any more\n");
405 * FDC IO functions, take care of the main status register, timeout
406 * in case the desired status bits are never set.
408 * These PIO loops initially start out with short delays between
409 * each iteration in the expectation that the required condition
410 * is usually met quickly, so it can be handled immediately.
413 fdc_in(struct fdc_data *fdc, int *ptr)
418 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
419 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
420 if (i == (NE7_DIO|NE7_RQM)) {
427 return (fdc_err(fdc, "ready for output in input\n"));
431 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
435 fdc_out(struct fdc_data *fdc, int x)
440 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
441 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
446 if (i == (NE7_DIO|NE7_RQM))
447 return (fdc_err(fdc, "ready for input in output\n"));
451 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
455 * fdc_cmd: Send a command to the chip.
456 * Takes a varargs with this structure:
458 * output bytes as int [...]
460 * input bytes as int* [...]
463 fdc_cmd(struct fdc_data *fdc, int n_out, ...)
471 for (n = 0; n < n_out; n++) {
475 if (fdc_out(fdc, i) < 0) {
477 snprintf(msg, sizeof(msg),
478 "cmd %x failed at out byte %d of %d\n",
480 fdc->flags |= FDC_NEEDS_RESET;
482 return fdc_err(fdc, msg);
485 n_in = va_arg(ap, int);
486 for (n = 0; n < n_in; n++) {
487 int *ptr = va_arg(ap, int *);
488 if (fdc_in(fdc, ptr) < 0) {
490 snprintf(msg, sizeof(msg),
491 "cmd %02x failed at in byte %d of %d\n",
493 fdc->flags |= FDC_NEEDS_RESET;
495 return fdc_err(fdc, msg);
503 fdc_reset(struct fdc_data *fdc)
507 if (fdc->fdct == FDC_ENHANCED) {
508 /* Try a software reset, default precomp, and 500 kb/s */
509 fddsr_wr(fdc, I8207X_DSR_SR);
511 /* Try a hardware reset, keep motor on */
512 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
514 /* enable FDC, but defer interrupts a moment */
515 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
518 fdout_wr(fdc, fdc->fdout);
520 /* XXX after a reset, silently believe the FDC will accept commands */
521 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, spec1, spec2, 0))
522 device_printf(fdc->fdc_dev, " SPECIFY failed in reset\n");
524 if (fdc->fdct == FDC_ENHANCED) {
528 0x40 | /* Enable Implied Seek */
529 0x10 | /* Polling disabled */
530 (fifo_threshold - 1), /* Fifo threshold */
531 0x00, /* Precomp track */
533 device_printf(fdc->fdc_dev,
534 " CONFIGURE failed in reset\n");
535 if (debugflags & 1) {
538 10, &r[0], &r[1], &r[2], &r[3], &r[4],
539 &r[5], &r[6], &r[7], &r[8], &r[9]))
540 device_printf(fdc->fdc_dev,
541 " DUMPREG failed in reset\n");
542 for (i = 0; i < 10; i++)
543 printf(" %02x", r[i]);
550 fdc_sense_drive(struct fdc_data *fdc, int *st3p)
554 if (fdc_cmd(fdc, 2, NE7CMD_SENSED, fdc->fd->fdsu, 1, &st3))
555 return (fdc_err(fdc, "Sense Drive Status failed\n"));
562 fdc_sense_int(struct fdc_data *fdc, int *st0p, int *cylp)
566 ret = fdc_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
568 (void)fdc_err(fdc, "sense intr err reading stat reg 0\n");
575 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
577 * There doesn't seem to have been an interrupt.
579 return (FD_NOT_VALID);
582 if (fdc_in(fdc, &cyl) < 0)
583 return fdc_err(fdc, "can't get cyl num\n");
592 fdc_read_status(struct fdc_data *fdc)
596 for (i = ret = 0; i < 7; i++) {
597 ret = fdc_in(fdc, &status);
598 fdc->status[i] = status;
604 fdc->flags |= FDC_STAT_VALID;
606 fdc->flags &= ~FDC_STAT_VALID;
615 fd_select(struct fd_data *fd)
617 struct fdc_data *fdc;
619 /* XXX: lock controller */
621 fdc->fdout &= ~FDO_FDSEL;
622 fdc->fdout |= FDO_FDMAEN | FDO_FRST | fd->fdsu;
623 fdout_wr(fdc, fdc->fdout);
634 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
635 fd->flags &= ~FD_MOTORWAIT;
636 fd->flags |= FD_MOTOR;
639 bp = bioq_takefirst(&fd->fd_bq);
642 bioq_disksort(&fd->fdc->head, bp);
646 wakeup(&fd->fdc->head);
650 fd_motor(struct fd_data *fd, int turnon)
652 struct fdc_data *fdc;
656 mtx_assert(&fdc->fdc_mtx, MA_OWNED);
659 fd->flags |= FD_MOTORWAIT;
660 fdc->fdout |= (FDO_MOEN0 << fd->fdsu);
661 callout_reset(&fd->toffhandle, hz, fd_turnon, fd);
663 callout_stop(&fd->toffhandle);
664 fd->flags &= ~(FD_MOTOR|FD_MOTORWAIT);
665 fdc->fdout &= ~(FDO_MOEN0 << fd->fdsu);
667 fdout_wr(fdc, fdc->fdout);
671 fd_turnoff(void *xfd)
673 struct fd_data *fd = xfd;
675 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
680 * fdc_intr - wake up the worker thread.
691 fdc_intr_fast(void *arg)
695 return(FILTER_HANDLED);
699 * fdc_pio(): perform programmed IO read/write for YE PCMCIA floppy.
702 fdc_pio(struct fdc_data *fdc)
709 cptr = fdc->fd->fd_ioptr;
710 count = fdc->fd->fd_iosize;
712 if (bp->bio_cmd == BIO_READ) {
713 fdbcdr_wr(fdc, 0, count);
714 bus_space_read_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
715 fdc->ioff[FD_YE_DATAPORT], cptr, count);
717 bus_space_write_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
718 fdc->ioff[FD_YE_DATAPORT], cptr, count);
719 fdbcdr_wr(fdc, 0, count); /* needed? */
724 fdc_biodone(struct fdc_data *fdc, int error)
732 mtx_lock(&fdc->fdc_mtx);
733 if (--fd->fd_iocount == 0)
734 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
737 mtx_unlock(&fdc->fdc_mtx);
738 if (bp->bio_to != NULL) {
739 if ((debugflags & 2) && fd->fdc->retry > 0)
740 printf("retries: %d\n", fd->fdc->retry);
741 g_io_deliver(bp, error);
744 bp->bio_error = error;
745 bp->bio_flags |= BIO_DONE;
750 static int retry_line;
753 fdc_worker(struct fdc_data *fdc)
758 int st0, st3, cyl, mfm, steptrac, cylinder, descyl, sec;
760 static int need_recal;
761 struct fdc_readid *idp;
762 struct fd_formb *finfo;
764 /* Have we exhausted our retries ? */
768 (fdc->retry >= retries || (fd->options & FDOPT_NORETRY))) {
769 if ((debugflags & 4))
770 printf("Too many retries (EIO)\n");
771 mtx_lock(&fdc->fdc_mtx);
772 fd->flags |= FD_EMPTY;
773 mtx_unlock(&fdc->fdc_mtx);
774 return (fdc_biodone(fdc, EIO));
777 /* Disable ISADMA if we bailed while it was active */
778 if (fd != NULL && (fd->flags & FD_ISADMA)) {
781 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE,
782 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
784 mtx_lock(&fdc->fdc_mtx);
785 fd->flags &= ~FD_ISADMA;
786 mtx_unlock(&fdc->fdc_mtx);
789 /* Unwedge the controller ? */
790 if (fdc->flags & FDC_NEEDS_RESET) {
791 fdc->flags &= ~FDC_NEEDS_RESET;
793 tsleep(fdc, PRIBIO, "fdcrst", hz);
794 /* Discard results */
795 for (i = 0; i < 4; i++)
796 fdc_sense_int(fdc, &st0, &cyl);
797 /* All drives must recal */
801 /* Pick up a request, if need be wait for it */
802 if (fdc->bp == NULL) {
803 mtx_lock(&fdc->fdc_mtx);
805 fdc->bp = bioq_takefirst(&fdc->head);
807 msleep(&fdc->head, &fdc->fdc_mtx,
809 } while (fdc->bp == NULL &&
810 (fdc->flags & FDC_KTHREAD_EXIT) == 0);
811 mtx_unlock(&fdc->fdc_mtx);
815 * Nothing to do, worker thread has been
821 fd = fdc->fd = bp->bio_driver1;
823 fd->fd_ioptr = bp->bio_data;
824 if (bp->bio_cmd & BIO_FMT) {
825 i = offsetof(struct fd_formb, fd_formb_cylno(0));
827 fd->fd_iosize = bp->bio_length - i;
831 /* Select drive, setup params */
833 if (fdc->fdct == FDC_ENHANCED)
834 fddsr_wr(fdc, fd->ft->trans);
836 fdctl_wr(fdc, fd->ft->trans);
838 if (bp->bio_cmd & BIO_PROBE) {
840 if (!(fdin_rd(fdc) & FDI_DCHG) && !(fd->flags & FD_EMPTY))
841 return (fdc_biodone(fdc, 0));
844 * Try to find out if we have a disk in the drive
846 * First recal, then seek to cyl#1, this clears the
847 * old condition on the disk change line so we can
848 * examine it for current status
850 if (debugflags & 0x40)
851 printf("New disk in probe\n");
852 mtx_lock(&fdc->fdc_mtx);
853 fd->flags |= FD_NEWDISK;
854 mtx_unlock(&fdc->fdc_mtx);
855 retry_line = __LINE__;
856 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
858 tsleep(fdc, PRIBIO, "fdrecal", hz);
859 retry_line = __LINE__;
860 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
861 return (1); /* XXX */
862 retry_line = __LINE__;
863 if ((st0 & 0xc0) || cyl != 0)
866 /* Seek to track 1 */
867 retry_line = __LINE__;
868 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, 1, 0))
870 tsleep(fdc, PRIBIO, "fdseek", hz);
871 retry_line = __LINE__;
872 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
873 return (1); /* XXX */
874 need_recal |= (1 << fd->fdsu);
875 if (fdin_rd(fdc) & FDI_DCHG) {
876 if (debugflags & 0x40)
877 printf("Empty in probe\n");
878 mtx_lock(&fdc->fdc_mtx);
879 fd->flags |= FD_EMPTY;
880 mtx_unlock(&fdc->fdc_mtx);
882 if (debugflags & 0x40)
883 printf("Got disk in probe\n");
884 mtx_lock(&fdc->fdc_mtx);
885 fd->flags &= ~FD_EMPTY;
886 mtx_unlock(&fdc->fdc_mtx);
887 retry_line = __LINE__;
888 if(fdc_sense_drive(fdc, &st3) != 0)
890 mtx_lock(&fdc->fdc_mtx);
895 mtx_unlock(&fdc->fdc_mtx);
897 return (fdc_biodone(fdc, 0));
901 * If we are dead just flush the requests
903 if (fd->flags & FD_EMPTY)
904 return (fdc_biodone(fdc, ENXIO));
906 /* Check if we lost our media */
907 if (fdin_rd(fdc) & FDI_DCHG) {
908 if (debugflags & 0x40)
909 printf("Lost disk\n");
910 mtx_lock(&fdc->fdc_mtx);
911 fd->flags |= FD_EMPTY;
912 fd->flags |= FD_NEWDISK;
913 mtx_unlock(&fdc->fdc_mtx);
915 g_orphan_provider(fd->fd_provider, EXDEV);
916 fd->fd_provider->flags |= G_PF_WITHER;
918 g_new_providerf(fd->fd_geom, fd->fd_geom->name);
919 g_error_provider(fd->fd_provider, 0);
921 return (fdc_biodone(fdc, ENXIO));
924 /* Check if the floppy is write-protected */
925 if(bp->bio_cmd & (BIO_FMT | BIO_WRITE)) {
926 retry_line = __LINE__;
927 if(fdc_sense_drive(fdc, &st3) != 0)
930 return (fdc_biodone(fdc, EROFS));
933 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0;
934 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1;
935 i = fd->ft->sectrac * fd->ft->heads;
936 cylinder = bp->bio_pblkno / i;
937 descyl = cylinder * steptrac;
938 sec = bp->bio_pblkno % i;
940 head = sec / fd->ft->sectrac;
941 sec = sec % fd->ft->sectrac + 1;
943 /* If everything is going swimmingly, use multisector xfer */
944 if (fdc->retry == 0 && bp->bio_cmd & (BIO_READ|BIO_WRITE)) {
945 fd->fd_iosize = imin(nsect * fd->sectorsize, bp->bio_resid);
946 nsect = fd->fd_iosize / fd->sectorsize;
947 } else if (bp->bio_cmd & (BIO_READ|BIO_WRITE)) {
948 fd->fd_iosize = fd->sectorsize;
952 /* Do RECAL if we need to or are going to track zero anyway */
953 if ((need_recal & (1 << fd->fdsu)) ||
954 (cylinder == 0 && fd->track != 0) ||
956 retry_line = __LINE__;
957 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
959 tsleep(fdc, PRIBIO, "fdrecal", hz);
960 retry_line = __LINE__;
961 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
962 return (1); /* XXX */
963 retry_line = __LINE__;
964 if ((st0 & 0xc0) || cyl != 0)
966 need_recal &= ~(1 << fd->fdsu);
968 /* let the heads settle */
970 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
974 * SEEK to where we want to be
976 * Enhanced controllers do implied seeks for read&write as long as
977 * we do not need multiple steps per track.
979 if (cylinder != fd->track && (
980 fdc->fdct != FDC_ENHANCED ||
981 descyl != cylinder ||
982 (bp->bio_cmd & (BIO_RDID|BIO_FMT)))) {
983 retry_line = __LINE__;
984 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, descyl, 0))
986 tsleep(fdc, PRIBIO, "fdseek", hz);
987 retry_line = __LINE__;
988 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
989 return (1); /* XXX */
990 retry_line = __LINE__;
991 if ((st0 & 0xc0) || cyl != descyl) {
992 need_recal |= (1 << fd->fdsu);
995 /* let the heads settle */
997 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
999 fd->track = cylinder;
1002 printf("op %x bn %ju siz %u ptr %p retry %d\n",
1003 bp->bio_cmd, bp->bio_pblkno, fd->fd_iosize,
1004 fd->fd_ioptr, fdc->retry);
1006 /* Setup ISADMA if we need it and have it */
1007 if ((bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_FMT))
1008 && !(fdc->flags & FDC_NODMA)) {
1011 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE,
1012 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
1014 mtx_lock(&fdc->fdc_mtx);
1015 fd->flags |= FD_ISADMA;
1016 mtx_unlock(&fdc->fdc_mtx);
1019 /* Do PIO if we have to */
1020 if (fdc->flags & FDC_NODMA) {
1021 if (bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_FMT))
1022 fdbcdr_wr(fdc, 1, fd->fd_iosize);
1023 if (bp->bio_cmd & (BIO_WRITE|BIO_FMT))
1027 switch(bp->bio_cmd) {
1030 finfo = (struct fd_formb *)bp->bio_data;
1031 retry_line = __LINE__;
1033 NE7CMD_FORMAT | mfm,
1034 head << 2 | fd->fdsu,
1035 finfo->fd_formb_secshift,
1036 finfo->fd_formb_nsecs,
1037 finfo->fd_formb_gaplen,
1038 finfo->fd_formb_fillbyte, 0))
1042 retry_line = __LINE__;
1044 NE7CMD_READID | mfm,
1045 head << 2 | fd->fdsu, 0))
1049 retry_line = __LINE__;
1051 NE7CMD_READ | NE7CMD_SK | mfm | NE7CMD_MT,
1052 head << 2 | fd->fdsu, /* head & unit */
1053 fd->track, /* track */
1055 sec, /* sector + 1 */
1056 fd->ft->secsize, /* sector size */
1057 fd->ft->sectrac, /* sectors/track */
1058 fd->ft->gap, /* gap size */
1059 fd->ft->datalen, /* data length */
1064 retry_line = __LINE__;
1066 NE7CMD_WRITE | mfm | NE7CMD_MT,
1067 head << 2 | fd->fdsu, /* head & unit */
1068 fd->track, /* track */
1070 sec, /* sector + 1 */
1071 fd->ft->secsize, /* sector size */
1072 fd->ft->sectrac, /* sectors/track */
1073 fd->ft->gap, /* gap size */
1074 fd->ft->datalen, /* data length */
1079 KASSERT(0 == 1, ("Wrong bio_cmd %x\n", bp->bio_cmd));
1082 /* Wait for interrupt */
1083 i = tsleep(fdc, PRIBIO, "fddata", hz);
1085 /* PIO if the read looks good */
1086 if (i == 0 && (fdc->flags & FDC_NODMA) && (bp->bio_cmd & BIO_READ))
1090 if (fd->flags & FD_ISADMA) {
1093 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE,
1094 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
1096 mtx_lock(&fdc->fdc_mtx);
1097 fd->flags &= ~FD_ISADMA;
1098 mtx_unlock(&fdc->fdc_mtx);
1105 * Due to IBM's brain-dead design, the FDC has a faked ready
1106 * signal, hardwired to ready == true. Thus, any command
1107 * issued if there's no diskette in the drive will _never_
1108 * complete, and must be aborted by resetting the FDC.
1109 * Many thanks, Big Blue!
1111 retry_line = __LINE__;
1112 fdc->flags |= FDC_NEEDS_RESET;
1116 retry_line = __LINE__;
1117 if (fdc_read_status(fdc))
1120 if (debugflags & 0x10)
1121 printf(" -> %x %x %x %x\n",
1122 fdc->status[0], fdc->status[1],
1123 fdc->status[2], fdc->status[3]);
1125 st0 = fdc->status[0] & NE7_ST0_IC;
1127 retry_line = __LINE__;
1128 if (st0 == NE7_ST0_IC_AT && fdc->status[1] & NE7_ST1_OR) {
1130 * DMA overrun. Someone hogged the bus and
1131 * didn't release it in time for the next
1136 retry_line = __LINE__;
1137 if(st0 == NE7_ST0_IC_IV) {
1138 fdc->flags |= FDC_NEEDS_RESET;
1141 retry_line = __LINE__;
1142 if(st0 == NE7_ST0_IC_AT && fdc->status[2] & NE7_ST2_WC) {
1143 need_recal |= (1 << fd->fdsu);
1146 if (debugflags & 0x20) {
1147 printf("status %02x %02x %02x %02x %02x %02x\n",
1148 fdc->status[0], fdc->status[1], fdc->status[2],
1149 fdc->status[3], fdc->status[4], fdc->status[5]);
1151 retry_line = __LINE__;
1155 switch(bp->bio_cmd) {
1157 /* copy out ID field contents */
1158 idp = (struct fdc_readid *)bp->bio_data;
1159 idp->cyl = fdc->status[3];
1160 idp->head = fdc->status[4];
1161 idp->sec = fdc->status[5];
1162 idp->secshift = fdc->status[6];
1163 if (debugflags & 0x40)
1164 printf("c %d h %d s %d z %d\n",
1165 idp->cyl, idp->head, idp->sec, idp->secshift);
1169 bp->bio_pblkno += nsect;
1170 bp->bio_resid -= fd->fd_iosize;
1171 bp->bio_completed += fd->fd_iosize;
1172 fd->fd_ioptr += fd->fd_iosize;
1173 /* Since we managed to get something done, reset the retry */
1175 if (bp->bio_resid > 0)
1181 return (fdc_biodone(fdc, 0));
1185 fdc_thread(void *arg)
1187 struct fdc_data *fdc;
1192 mtx_lock(&fdc->fdc_mtx);
1193 fdc->flags |= FDC_KTHREAD_ALIVE;
1194 while ((fdc->flags & FDC_KTHREAD_EXIT) == 0) {
1195 mtx_unlock(&fdc->fdc_mtx);
1196 i = fdc_worker(fdc);
1197 if (i && debugflags & 0x20) {
1198 if (fdc->bp != NULL) {
1199 g_print_bio(fdc->bp);
1202 printf("Retry line %d\n", retry_line);
1205 mtx_lock(&fdc->fdc_mtx);
1207 fdc->flags &= ~(FDC_KTHREAD_EXIT | FDC_KTHREAD_ALIVE);
1208 mtx_unlock(&fdc->fdc_mtx);
1214 * Enqueue a request.
1217 fd_enqueue(struct fd_data *fd, struct bio *bp)
1219 struct fdc_data *fdc;
1224 mtx_lock(&fdc->fdc_mtx);
1225 /* If we go from idle, cancel motor turnoff */
1226 if (fd->fd_iocount++ == 0)
1227 callout_stop(&fd->toffhandle);
1228 if (fd->flags & FD_MOTOR) {
1229 /* The motor is on, send it directly to the controller */
1230 bioq_disksort(&fdc->head, bp);
1233 /* Queue it on the drive until the motor has started */
1234 bioq_insert_tail(&fd->fd_bq, bp);
1235 if (!(fd->flags & FD_MOTORWAIT))
1238 mtx_unlock(&fdc->fdc_mtx);
1242 fdmisccmd(struct fd_data *fd, u_int cmd, void *data)
1245 struct fd_formb *finfo;
1246 struct fdc_readid *idfield;
1249 bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO);
1252 * Set up a bio request for fdstrategy(). bio_offset is faked
1253 * so that fdstrategy() will seek to the the requested
1254 * cylinder, and use the desired head.
1257 if (cmd == BIO_FMT) {
1258 finfo = (struct fd_formb *)data;
1260 (finfo->cyl * fd->ft->heads + finfo->head) *
1262 bp->bio_length = sizeof *finfo;
1263 } else if (cmd == BIO_RDID) {
1264 idfield = (struct fdc_readid *)data;
1266 (idfield->cyl * fd->ft->heads + idfield->head) *
1268 bp->bio_length = sizeof(struct fdc_readid);
1269 } else if (cmd == BIO_PROBE) {
1272 panic("wrong cmd in fdmisccmd()");
1273 bp->bio_offset = bp->bio_pblkno * fd->sectorsize;
1274 bp->bio_data = data;
1275 bp->bio_driver1 = fd;
1281 tsleep(bp, PRIBIO, "fdwait", hz);
1282 } while (!(bp->bio_flags & BIO_DONE));
1283 error = bp->bio_error;
1290 * Try figuring out the density of the media present in our device.
1293 fdautoselect(struct fd_data *fd)
1295 struct fd_type *fdtp;
1296 struct fdc_readid id;
1299 if (!(fd->ft->flags & FL_AUTO))
1302 fdtp = fd_native_types[fd->type];
1303 fdsettype(fd, fdtp);
1304 if (!(fd->ft->flags & FL_AUTO))
1308 * Try reading sector ID fields, first at cylinder 0, head 0,
1309 * then at cylinder 2, head N. We don't probe cylinder 1,
1310 * since for 5.25in DD media in a HD drive, there are no data
1311 * to read (2 step pulses per media cylinder required). For
1312 * two-sided media, the second probe always goes to head 1, so
1313 * we can tell them apart from single-sided media. As a
1314 * side-effect this means that single-sided media should be
1315 * mentioned in the search list after two-sided media of an
1316 * otherwise identical density. Media with a different number
1317 * of sectors per track but otherwise identical parameters
1318 * cannot be distinguished at all.
1320 * If we successfully read an ID field on both cylinders where
1321 * the recorded values match our expectation, we are done.
1322 * Otherwise, we try the next density entry from the table.
1324 * Stepping to cylinder 2 has the side-effect of clearing the
1325 * unit attention bit.
1327 oopts = fd->options;
1328 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1329 for (; fdtp->heads; fdtp++) {
1330 fdsettype(fd, fdtp);
1332 id.cyl = id.head = 0;
1333 rv = fdmisccmd(fd, BIO_RDID, &id);
1336 if (id.cyl != 0 || id.head != 0 || id.secshift != fdtp->secsize)
1339 id.head = fd->ft->heads - 1;
1340 rv = fdmisccmd(fd, BIO_RDID, &id);
1341 if (id.cyl != 2 || id.head != fdtp->heads - 1 ||
1342 id.secshift != fdtp->secsize)
1348 fd->options = oopts;
1349 if (fdtp->heads == 0) {
1350 if (debugflags & 0x40)
1351 device_printf(fd->dev, "autoselection failed\n");
1352 fdsettype(fd, fd_native_types[fd->type]);
1355 if (debugflags & 0x40) {
1356 device_printf(fd->dev,
1357 "autoselected %d KB medium\n", fd->ft->size / 2);
1358 fdprinttype(fd->ft);
1365 * GEOM class implementation
1368 static g_access_t fd_access;
1369 static g_start_t fd_start;
1370 static g_ioctl_t fd_ioctl;
1372 struct g_class g_fd_class = {
1374 .version = G_VERSION,
1376 .access = fd_access,
1381 fd_access(struct g_provider *pp, int r, int w, int e)
1384 struct fdc_data *fdc;
1388 fd = pp->geom->softc;
1392 * If our provider is withering, we can only get negative requests
1393 * and we don't want to even see them
1395 if (pp->flags & G_PF_WITHER)
1402 if (ar == 0 && aw == 0 && ae == 0) {
1403 device_unbusy(fd->dev);
1408 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) {
1409 if (fdmisccmd(fd, BIO_PROBE, NULL))
1411 if (fd->flags & FD_EMPTY)
1413 if (fd->flags & FD_NEWDISK) {
1415 mtx_lock(&fdc->fdc_mtx);
1416 fd->flags &= ~FD_NEWDISK;
1417 mtx_unlock(&fdc->fdc_mtx);
1419 device_busy(fd->dev);
1423 if (w > 0 && (fd->flags & FD_WP)) {
1425 device_unbusy(fd->dev);
1429 pp->sectorsize = fd->sectorsize;
1430 pp->stripesize = fd->ft->heads * fd->ft->sectrac * fd->sectorsize;
1431 pp->mediasize = pp->stripesize * fd->ft->tracks;
1436 fd_start(struct bio *bp)
1438 struct fdc_data * fdc;
1439 struct fd_data * fd;
1441 fd = bp->bio_to->geom->softc;
1443 bp->bio_driver1 = fd;
1444 if (bp->bio_cmd & BIO_GETATTR) {
1445 if (g_handleattr_int(bp, "GEOM::fwsectors", fd->ft->sectrac))
1447 if (g_handleattr_int(bp, "GEOM::fwheads", fd->ft->heads))
1449 g_io_deliver(bp, ENOIOCTL);
1452 if (!(bp->bio_cmd & (BIO_READ|BIO_WRITE))) {
1453 g_io_deliver(bp, EOPNOTSUPP);
1456 bp->bio_pblkno = bp->bio_offset / fd->sectorsize;
1457 bp->bio_resid = bp->bio_length;
1463 fd_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td)
1466 struct fdc_status *fsp;
1467 struct fdc_readid *rid;
1470 fd = pp->geom->softc;
1473 case FD_GTYPE: /* get drive type */
1474 *(struct fd_type *)data = *fd->ft;
1477 case FD_STYPE: /* set drive type */
1478 if (!(fflag & FWRITE))
1481 * Allow setting drive type temporarily iff
1482 * currently unset. Used for fdformat so any
1483 * user can set it, and then start formatting.
1485 fd->fts = *(struct fd_type *)data;
1486 if (fd->fts.sectrac) {
1487 /* XXX: check for rubbish */
1488 fdsettype(fd, &fd->fts);
1490 fdsettype(fd, fd_native_types[fd->type]);
1492 if (debugflags & 0x40)
1493 fdprinttype(fd->ft);
1496 case FD_GOPTS: /* get drive options */
1497 *(int *)data = fd->options;
1500 case FD_SOPTS: /* set drive options */
1501 if (!(fflag & FWRITE))
1503 fd->options = *(int *)data;
1507 error = priv_check(td, PRIV_DRIVER);
1510 fd->fdc->fdc_errs = 0;
1514 fsp = (struct fdc_status *)data;
1515 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
1517 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
1521 *(enum fd_drivetype *)data = fd->type;
1525 if (!(fflag & FWRITE))
1527 if (((struct fd_formb *)data)->format_version !=
1529 return (EINVAL); /* wrong version of formatting prog */
1530 error = fdmisccmd(fd, BIO_FMT, data);
1531 mtx_lock(&fd->fdc->fdc_mtx);
1532 fd->flags |= FD_NEWDISK;
1533 mtx_unlock(&fd->fdc->fdc_mtx);
1537 rid = (struct fdc_readid *)data;
1538 if (rid->cyl > 85 || rid->head > 1)
1540 error = fdmisccmd(fd, BIO_RDID, data);
1545 /* For backwards compat with old fd*(8) tools */
1550 if (debugflags & 0x80)
1551 printf("Unknown ioctl %lx\n", cmd);
1561 * Configuration/initialization stuff, per controller.
1564 devclass_t fdc_devclass;
1565 static devclass_t fd_devclass;
1573 fdc_release_resources(struct fdc_data *fdc)
1576 struct resource *last;
1581 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1582 fdc->fdc_intr = NULL;
1583 if (fdc->res_irq != NULL)
1584 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
1586 fdc->res_irq = NULL;
1588 for (i = 0; i < FDC_MAXREG; i++) {
1589 if (fdc->resio[i] != NULL && fdc->resio[i] != last) {
1590 bus_release_resource(dev, SYS_RES_IOPORT,
1591 fdc->ridio[i], fdc->resio[i]);
1592 last = fdc->resio[i];
1593 fdc->resio[i] = NULL;
1596 if (fdc->res_drq != NULL)
1597 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
1599 fdc->res_drq = NULL;
1603 fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
1605 struct fdc_ivars *ivars = device_get_ivars(child);
1608 case FDC_IVAR_FDUNIT:
1609 *result = ivars->fdunit;
1611 case FDC_IVAR_FDTYPE:
1612 *result = ivars->fdtype;
1621 fdc_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
1623 struct fdc_ivars *ivars = device_get_ivars(child);
1626 case FDC_IVAR_FDUNIT:
1627 ivars->fdunit = value;
1629 case FDC_IVAR_FDTYPE:
1630 ivars->fdtype = value;
1639 fdc_initial_reset(device_t dev, struct fdc_data *fdc)
1641 int ic_type, part_id;
1644 * A status value of 0xff is very unlikely, but not theoretically
1645 * impossible, but it is far more likely to indicate an empty bus.
1647 if (fdsts_rd(fdc) == 0xff)
1651 * Assert a reset to the floppy controller and check that the status
1652 * register goes to zero.
1656 if (fdsts_rd(fdc) != 0)
1660 * Clear the reset and see it come ready.
1662 fdout_wr(fdc, FDO_FRST);
1664 if (fdsts_rd(fdc) != 0x80)
1667 /* Then, see if it can handle a command. */
1668 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, 0xaf, 0x1e, 0))
1672 * Try to identify the chip.
1674 * The i8272 datasheet documents that unknown commands
1675 * will return ST0 as 0x80. The i8272 is supposedly identical
1677 * The i82077SL datasheet says 0x90 for the VERSION command,
1678 * and several "superio" chips emulate this.
1680 if (fdc_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type))
1682 if (fdc_cmd(fdc, 1, 0x18, 1, &part_id))
1686 "ic_type %02x part_id %02x\n", ic_type, part_id);
1687 switch (ic_type & 0xff) {
1689 device_set_desc(dev, "NEC 765 or clone");
1690 fdc->fdct = FDC_NE765;
1694 device_set_desc(dev,
1695 "Enhanced floppy controller");
1696 fdc->fdct = FDC_ENHANCED;
1699 device_set_desc(dev, "Generic floppy controller");
1700 fdc->fdct = FDC_UNKNOWN;
1707 fdc_detach(device_t dev)
1709 struct fdc_data *fdc;
1712 fdc = device_get_softc(dev);
1714 /* have our children detached first */
1715 if ((error = bus_generic_detach(dev)))
1718 /* kill worker thread */
1719 mtx_lock(&fdc->fdc_mtx);
1720 fdc->flags |= FDC_KTHREAD_EXIT;
1722 while ((fdc->flags & FDC_KTHREAD_ALIVE) != 0)
1723 msleep(fdc->fdc_thread, &fdc->fdc_mtx, PRIBIO, "fdcdet", 0);
1724 mtx_unlock(&fdc->fdc_mtx);
1726 /* reset controller, turn motor off */
1729 if (!(fdc->flags & FDC_NODMA))
1730 isa_dma_release(fdc->dmachan);
1731 fdc_release_resources(fdc);
1732 mtx_destroy(&fdc->fdc_mtx);
1737 * Add a child device to the fdc controller. It will then be probed etc.
1740 fdc_add_child(device_t dev, const char *name, int unit)
1742 struct fdc_ivars *ivar;
1745 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO);
1748 child = device_add_child(dev, name, unit);
1749 if (child == NULL) {
1750 free(ivar, M_DEVBUF);
1753 device_set_ivars(child, ivar);
1754 ivar->fdunit = unit;
1755 ivar->fdtype = FDT_NONE;
1756 if (resource_disabled(name, unit))
1757 device_disable(child);
1762 fdc_attach(device_t dev)
1764 struct fdc_data *fdc;
1767 fdc = device_get_softc(dev);
1769 error = fdc_initial_reset(dev, fdc);
1771 device_printf(dev, "does not respond\n");
1774 error = bus_setup_intr(dev, fdc->res_irq,
1775 INTR_TYPE_BIO | INTR_ENTROPY |
1776 ((fdc->flags & FDC_NOFAST) ? INTR_MPSAFE : 0),
1777 ((fdc->flags & FDC_NOFAST) ? NULL : fdc_intr_fast),
1778 ((fdc->flags & FDC_NOFAST) ? fdc_intr : NULL),
1779 fdc, &fdc->fdc_intr);
1781 device_printf(dev, "cannot setup interrupt\n");
1784 if (!(fdc->flags & FDC_NODMA)) {
1785 error = isa_dma_acquire(fdc->dmachan);
1787 error = isa_dma_init(fdc->dmachan,
1788 MAX_BYTES_PER_CYL, M_WAITOK);
1790 isa_dma_release(fdc->dmachan);
1795 fdc->fdcu = device_get_unit(dev);
1796 fdc->flags |= FDC_NEEDS_RESET;
1798 mtx_init(&fdc->fdc_mtx, "fdc lock", NULL, MTX_DEF);
1800 /* reset controller, turn motor off, clear fdout mirror reg */
1801 fdout_wr(fdc, fdc->fdout = 0);
1802 bioq_init(&fdc->head);
1804 kproc_create(fdc_thread, fdc, &fdc->fdc_thread, 0, 0,
1805 "fdc%d", device_get_unit(dev));
1813 fdc_hints_probe(device_t dev)
1815 const char *name, *dname;
1816 int i, error, dunit;
1819 * Probe and attach any children. We should probably detect
1820 * devices from the BIOS unless overridden.
1822 name = device_get_nameunit(dev);
1824 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) {
1825 resource_int_value(dname, dunit, "drive", &dunit);
1826 fdc_add_child(dev, dname, dunit);
1829 if ((error = bus_generic_attach(dev)) != 0)
1835 fdc_print_child(device_t me, device_t child)
1837 int retval = 0, flags;
1839 retval += bus_print_child_header(me, child);
1840 retval += printf(" on %s drive %d", device_get_nameunit(me),
1841 fdc_get_fdunit(child));
1842 if ((flags = device_get_flags(me)) != 0)
1843 retval += printf(" flags %#x", flags);
1844 retval += printf("\n");
1850 * Configuration/initialization, per drive.
1853 fd_probe(device_t dev)
1858 struct fdc_data *fdc;
1862 fdsu = fdc_get_fdunit(dev);
1863 fd = device_get_softc(dev);
1864 fdc = device_get_softc(device_get_parent(dev));
1865 flags = device_get_flags(dev);
1870 unit = device_get_unit(dev);
1872 /* Auto-probe if fdinfo is present, but always allow override. */
1873 type = flags & FD_TYPEMASK;
1874 if (type == FDT_NONE && (type = fdc_get_fdtype(dev)) != FDT_NONE) {
1878 /* make sure fdautoselect() will be called */
1879 fd->flags = FD_EMPTY;
1883 #if (defined(__i386__) && !defined(PC98)) || defined(__amd64__)
1884 if (fd->type == FDT_NONE && (unit == 0 || unit == 1)) {
1885 /* Look up what the BIOS thinks we have. */
1887 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4;
1889 fd->type = rtcin(RTC_FDISKETTE) & 0x0f;
1890 if (fd->type == FDT_288M_1)
1891 fd->type = FDT_288M;
1893 #endif /* __i386__ || __amd64__ */
1894 /* is there a unit? */
1895 if (fd->type == FDT_NONE)
1899 mtx_lock(&fdc->fdc_mtx);
1905 fdc_reset(fdc); /* XXX reset, then unreset, etc. */
1906 DELAY(1000000); /* 1 sec */
1908 if ((flags & FD_NO_PROBE) == 0) {
1909 /* If we're at track 0 first seek inwards. */
1910 if ((fdc_sense_drive(fdc, &st3) == 0) &&
1911 (st3 & NE7_ST3_T0)) {
1912 /* Seek some steps... */
1913 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
1914 /* ...wait a moment... */
1916 /* make ctrlr happy: */
1917 fdc_sense_int(fdc, NULL, NULL);
1921 for (i = 0; i < 2; i++) {
1923 * we must recalibrate twice, just in case the
1924 * heads have been beyond cylinder 76, since
1925 * most FDCs still barf when attempting to
1926 * recalibrate more than 77 steps
1929 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
1930 /* a second being enough for full stroke seek*/
1931 DELAY(i == 0 ? 1000000 : 300000);
1933 /* anything responding? */
1934 if (fdc_sense_int(fdc, &st0, NULL) == 0 &&
1935 (st0 & NE7_ST0_EC) == 0)
1936 break; /* already probed succesfully */
1944 mtx_unlock(&fdc->fdc_mtx);
1947 if ((flags & FD_NO_PROBE) == 0 &&
1948 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */
1955 device_set_desc(dev, "1200-KB 5.25\" drive");
1958 device_set_desc(dev, "1440-KB 3.5\" drive");
1961 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
1964 device_set_desc(dev, "360-KB 5.25\" drive");
1967 device_set_desc(dev, "720-KB 3.5\" drive");
1972 fd->track = FD_NO_TRACK;
1976 callout_init_mtx(&fd->toffhandle, &fd->fdc->fdc_mtx, 0);
1978 /* initialize densities for subdevices */
1979 fdsettype(fd, fd_native_types[fd->type]);
1984 * We have to do this in a geom event because GEOM is not running
1985 * when fd_attach() is.
1986 * XXX: move fd_attach after geom like ata/scsi disks
1989 fd_attach2(void *arg, int flag)
1995 fd->fd_geom = g_new_geomf(&g_fd_class,
1996 "fd%d", device_get_unit(fd->dev));
1997 fd->fd_provider = g_new_providerf(fd->fd_geom, fd->fd_geom->name);
1998 fd->fd_geom->softc = fd;
1999 g_error_provider(fd->fd_provider, 0);
2003 fd_attach(device_t dev)
2007 fd = device_get_softc(dev);
2008 g_post_event(fd_attach2, fd, M_WAITOK, NULL);
2009 fd->flags |= FD_EMPTY;
2010 bioq_init(&fd->fd_bq);
2016 fd_detach(device_t dev)
2020 fd = device_get_softc(dev);
2022 g_wither_geom(fd->fd_geom, ENXIO);
2023 g_topology_unlock();
2024 while (device_get_state(dev) == DS_BUSY)
2025 tsleep(fd, PZERO, "fdd", hz/10);
2026 callout_drain(&fd->toffhandle);
2031 static device_method_t fd_methods[] = {
2032 /* Device interface */
2033 DEVMETHOD(device_probe, fd_probe),
2034 DEVMETHOD(device_attach, fd_attach),
2035 DEVMETHOD(device_detach, fd_detach),
2036 DEVMETHOD(device_shutdown, bus_generic_shutdown),
2037 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
2038 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
2042 static driver_t fd_driver = {
2045 sizeof(struct fd_data)
2049 fdc_modevent(module_t mod, int type, void *data)
2052 g_modevent(NULL, type, &g_fd_class);
2056 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, fdc_modevent, 0);