2 * Copyright (c) 1990 The Regents of the University of California.
5 * This code is derived from software contributed to Berkeley by
8 * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu)
9 * aided by the Linux floppy driver modifications from David Bateman
10 * (dbateman@eng.uts.edu.au).
12 * Copyright (c) 1993, 1994 by
13 * jc@irbs.UUCP (John Capo)
14 * vak@zebub.msk.su (Serge Vakulenko)
15 * ache@astral.msk.su (Andrew A. Chernov)
17 * Copyright (c) 1993, 1994, 1995 by
18 * joerg_wunsch@uriah.sax.de (Joerg Wunsch)
19 * dufault@hda.com (Peter Dufault)
21 * Copyright (c) 2001 Joerg Wunsch,
22 * joerg_wunsch@uriah.sax.de (Joerg Wunsch)
24 * Redistribution and use in source and binary forms, with or without
25 * modification, are permitted provided that the following conditions
27 * 1. Redistributions of source code must retain the above copyright
28 * notice, this list of conditions and the following disclaimer.
29 * 2. Redistributions in binary form must reproduce the above copyright
30 * notice, this list of conditions and the following disclaimer in the
31 * documentation and/or other materials provided with the distribution.
32 * 3. All advertising materials mentioning features or use of this software
33 * must display the following acknowledgement:
34 * This product includes software developed by the University of
35 * California, Berkeley and its contributors.
36 * 4. Neither the name of the University nor the names of its contributors
37 * may be used to endorse or promote products derived from this software
38 * without specific prior written permission.
40 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * from: @(#)fd.c 7.4 (Berkeley) 5/25/91
53 * $FreeBSD: src/sys/isa/fd.c,v 1.176.2.8 2002/05/15 21:56:14 joerg Exp $
54 * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.26 2006/03/24 18:35:32 dillon Exp $
59 #include "use_pccard.h"
61 #include <sys/param.h>
62 #include <sys/systm.h>
63 #include <sys/bootmaj.h>
64 #include <sys/kernel.h>
68 #include <sys/disklabel.h>
69 #include <sys/devicestat.h>
70 #include <sys/fcntl.h>
71 #include <sys/malloc.h>
72 #include <sys/module.h>
74 #include <sys/syslog.h>
75 #include <sys/device.h>
78 #include <machine/bus.h>
82 #include <sys/thread2.h>
84 #include <machine/clock.h>
85 #include <machine/ioctl_fd.h>
86 #include <machine/resource.h>
87 #include <machine/stdarg.h>
89 #include <bus/isa/isavar.h>
90 #include <bus/isa/isareg.h>
93 #include <bus/isa/rtc.h>
95 /* misuse a flag to identify format operation */
96 #define B_FORMAT B_XXX
98 /* configuration flags */
99 #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
100 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
102 /* internally used only, not really from CMOS: */
103 #define RTCFDT_144M_PRETENDED 0x1000
105 /* error returns for fd_cmd() */
107 #define FD_NOT_VALID -2
108 #define FDC_ERRMAX 100 /* do not log more */
110 * Stop retrying after this many DMA overruns. Since each retry takes
111 * one revolution, with 300 rpm., 25 retries take approximately 10
112 * seconds which the read attempt will block in case the DMA overrun
115 #define FDC_DMAOV_MAX 25
118 * Timeout value for the PIO loops to wait until the FDC main status
119 * register matches our expectations (request for master, direction
120 * bit). This is supposed to be a number of microseconds, although
121 * timing might actually not be very accurate.
123 * Timeouts of 100 msec are believed to be required for some broken
126 #define FDSTS_TIMEOUT 100000
129 #define NUMDENS (NUMTYPES - 7)
131 /* These defines (-1) must match index for fd_types */
132 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
133 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */
145 #define FD_1480in5_25 11
146 #define FD_1440in5_25 12
147 #define FD_820in5_25 13
148 #define FD_800in5_25 14
149 #define FD_720in5_25 15
150 #define FD_360in5_25 16
151 #define FD_640in5_25 17
154 static struct fd_type fd_types[NUMTYPES] =
156 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
157 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
158 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
159 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
160 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
161 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
162 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
163 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
164 { 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
165 { 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
167 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
168 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
169 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
170 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
171 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
172 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
173 { 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
176 #define DRVS_PER_CTLR 2 /* 2 floppies */
178 /***********************************************************************\
179 * Per controller structure. *
180 \***********************************************************************/
181 devclass_t fdc_devclass;
183 /***********************************************************************\
184 * Per drive structure. *
185 * N per controller (DRVS_PER_CTLR) *
186 \***********************************************************************/
188 struct fdc_data *fdc; /* pointer to controller structure */
189 int fdsu; /* this units number on this controller */
190 int type; /* Drive type (FD_1440...) */
191 struct fd_type *ft; /* pointer to the type descriptor */
193 #define FD_OPEN 0x01 /* it's open */
194 #define FD_ACTIVE 0x02 /* it's active */
195 #define FD_MOTOR 0x04 /* motor should be on */
196 #define FD_MOTOR_WAIT 0x08 /* motor coming up */
199 #define FD_NO_TRACK -2
200 int track; /* where we think the head is */
201 int options; /* user configurable options, see ioctl_fd.h */
202 struct callout toffhandle;
203 struct callout tohandle;
204 struct callout motor;
205 struct devstat device_stats;
213 static devclass_t fd_devclass;
215 /***********************************************************************\
216 * Throughout this file the following conventions will be used: *
217 * fd is a pointer to the fd_data struct for the drive in question *
218 * fdc is a pointer to the fdc_data struct for the controller *
219 * fdu is the floppy drive unit number *
220 * fdcu is the floppy controller unit number *
221 * fdsu is the floppy drive unit number on that controller. (sub-unit) *
222 \***********************************************************************/
224 /* internal functions */
225 static void fdc_intr(void *);
226 static void set_motor(struct fdc_data *, int, int);
229 static timeout_t fd_turnoff;
230 static timeout_t fd_motor_on;
231 static void fd_turnon(struct fd_data *);
232 static void fdc_reset(fdc_p);
233 static int fd_in(struct fdc_data *, int *);
234 static int out_fdc(struct fdc_data *, int);
235 static void fdstart(struct fdc_data *);
236 static timeout_t fd_iotimeout;
237 static timeout_t fd_pseudointr;
238 static int fdstate(struct fdc_data *);
239 static int retrier(struct fdc_data *);
240 static int fdformat(dev_t, struct fd_formb *, struct thread *);
242 static int enable_fifo(fdc_p fdc);
244 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
250 #define SEEKCOMPLETE 3
252 #define RECALCOMPLETE 5
258 #define IOTIMEDOUT 11
259 #define RESETCOMPLETE 12
263 static char const * const fdstates[] =
281 /* CAUTION: fd_debug causes huge amounts of logging output */
282 static int volatile fd_debug = 0;
283 #define TRACE0(arg) if(fd_debug) printf(arg)
284 #define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2)
285 #else /* FDC_DEBUG */
287 #define TRACE1(arg1, arg2)
288 #endif /* FDC_DEBUG */
291 fdout_wr(fdc_p fdc, u_int8_t v)
293 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
299 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
303 fddata_wr(fdc_p fdc, u_int8_t v)
305 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
311 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
315 fdctl_wr_isa(fdc_p fdc, u_int8_t v)
317 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
325 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
330 static d_open_t Fdopen; /* NOTE, not fdopen */
331 static d_close_t fdclose;
332 static d_ioctl_t fdioctl;
333 static d_strategy_t fdstrategy;
335 static struct cdevsw fd_cdevsw = {
337 /* maj */ FD_CDEV_MAJOR,
345 /* write */ physwrite,
349 /* strategy */ fdstrategy,
355 fdc_err(struct fdc_data *fdc, const char *s)
359 if (fdc->fdc_errs < FDC_ERRMAX)
360 device_printf(fdc->fdc_dev, "%s", s);
361 else if (fdc->fdc_errs == FDC_ERRMAX)
362 device_printf(fdc->fdc_dev, "too many errors, not "
363 "logging any more\n");
370 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
372 * # of output bytes, output bytes as ints ...,
373 * # of input bytes, input bytes as ints ...
376 fd_cmd(struct fdc_data *fdc, int n_out, ...)
383 __va_start(ap, n_out);
384 cmd = (u_char)(__va_arg(ap, int));
386 __va_start(ap, n_out);
387 for (n = 0; n < n_out; n++)
389 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
392 snprintf(msg, sizeof(msg),
393 "cmd %x failed at out byte %d of %d\n",
395 return fdc_err(fdc, msg);
398 n_in = __va_arg(ap, int);
399 for (n = 0; n < n_in; n++)
401 int *ptr = __va_arg(ap, int *);
402 if (fd_in(fdc, ptr) < 0)
405 snprintf(msg, sizeof(msg),
406 "cmd %02x failed at in byte %d of %d\n",
408 return fdc_err(fdc, msg);
416 enable_fifo(fdc_p fdc)
420 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
424 * Cannot use fd_cmd the normal way here, since
425 * this might be an invalid command. Thus we send the
426 * first byte, and check for an early turn of data directon.
429 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
430 return fdc_err(fdc, "Enable FIFO failed\n");
432 /* If command is invalid, return */
434 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
435 != NE7_RQM && j-- > 0) {
436 if (i == (NE7_DIO | NE7_RQM)) {
444 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
446 return fdc_err(fdc, "Enable FIFO failed\n");
448 fdc->flags |= FDC_HAS_FIFO;
452 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
453 return fdc_err(fdc, "Re-enable FIFO failed\n");
458 fd_sense_drive_status(fdc_p fdc, int *st3p)
462 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
464 return fdc_err(fdc, "Sense Drive Status failed\n");
473 fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
477 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
480 "sense intr err reading stat reg 0\n");
487 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
489 * There doesn't seem to have been an interrupt.
494 if (fd_in(fdc, &cyl) < 0) {
495 return fdc_err(fdc, "can't get cyl num\n");
506 fd_read_status(fdc_p fdc, int fdsu)
510 for (i = 0; i < 7; i++) {
512 * XXX types are poorly chosen. Only bytes can by read
513 * from the hardware, but fdc->status[] wants u_ints and
514 * fd_in() gives ints.
518 ret = fd_in(fdc, &status);
519 fdc->status[i] = status;
525 fdc->flags |= FDC_STAT_VALID;
527 fdc->flags &= ~FDC_STAT_VALID;
532 /****************************************************************************/
533 /* autoconfiguration stuff */
534 /****************************************************************************/
537 fdc_alloc_resources(struct fdc_data *fdc)
543 ispnp = (fdc->flags & FDC_ISPNP) != 0;
544 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
545 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
546 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
549 * On standard ISA, we don't just use an 8 port range
550 * (e.g. 0x3f0-0x3f7) since that covers an IDE control
553 * Isn't PC hardware wonderful.
555 * The Y-E Data PCMCIA FDC doesn't have this problem, it
556 * uses the register with offset 6 for pseudo-DMA, and the
557 * one with offset 7 as control register.
559 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
560 &fdc->rid_ioport, 0ul, ~0ul,
561 ispcmcia ? 8 : (ispnp ? 1 : 6),
563 if (fdc->res_ioport == 0) {
564 device_printf(dev, "cannot reserve I/O port range\n");
567 fdc->portt = rman_get_bustag(fdc->res_ioport);
568 fdc->porth = rman_get_bushandle(fdc->res_ioport);
572 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
573 * and some at 0x3f0-0x3f5,0x3f7. We detect the former
574 * by checking the size and adjust the port address
577 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
581 * Register the control port range as rid 1 if it
582 * isn't there already. Most PnP BIOSen will have
583 * already done this but non-PnP configurations don't.
585 * And some (!!) report 0x3f2-0x3f5 and completely
586 * leave out the control register! It seems that some
587 * non-antique controller chips have a different
588 * method of programming the transfer speed which
589 * doesn't require the control register, but it's
590 * mighty bogus as the chip still responds to the
591 * address for the control register.
593 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
596 /* Find the control port, usually 0x3f7 */
597 ctlstart = rman_get_start(fdc->res_ioport) +
600 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
604 * Now (finally!) allocate the control port.
607 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
609 0ul, ~0ul, 1, RF_ACTIVE);
610 if (fdc->res_ctl == 0) {
612 "cannot reserve control I/O port range\n");
615 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
616 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
619 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
620 &fdc->rid_irq, 0ul, ~0ul, 1,
622 if (fdc->res_irq == 0) {
623 device_printf(dev, "cannot reserve interrupt line\n");
627 if ((fdc->flags & FDC_NODMA) == 0) {
628 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
629 &fdc->rid_drq, 0ul, ~0ul, 1,
631 if (fdc->res_drq == 0) {
632 device_printf(dev, "cannot reserve DMA request line\n");
635 fdc->dmachan = fdc->res_drq->r_start;
642 fdc_release_resources(struct fdc_data *fdc)
647 if (fdc->res_irq != 0) {
648 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
650 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
653 if (fdc->res_ctl != 0) {
654 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
656 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
659 if (fdc->res_ioport != 0) {
660 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
662 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
665 if (fdc->res_drq != 0) {
666 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
668 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
673 /****************************************************************************/
674 /* autoconfiguration stuff */
675 /****************************************************************************/
677 static struct isa_pnp_id fdc_ids[] = {
678 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
679 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
684 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
686 struct fdc_ivars *ivars = device_get_ivars(child);
689 case FDC_IVAR_FDUNIT:
690 *result = ivars->fdunit;
699 * fdc controller section.
702 fdc_probe(device_t dev)
705 struct fdc_data *fdc;
707 fdc = device_get_softc(dev);
708 bzero(fdc, sizeof *fdc);
710 fdc->fdctl_wr = fdctl_wr_isa;
713 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
717 fdc->flags |= FDC_ISPNP;
719 /* Attempt to allocate our resources for the duration of the probe */
720 error = fdc_alloc_resources(fdc);
724 /* First - lets reset the floppy controller */
727 fdout_wr(fdc, FDO_FRST);
729 /* see if it can handle a command */
730 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
731 NE7_SPEC_2(2, 0), 0)) {
736 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
737 ic_type = (u_char)ic_type;
740 device_set_desc(dev, "NEC 765 or clone");
741 fdc->fdct = FDC_NE765;
744 device_set_desc(dev, "Intel 82077 or clone");
745 fdc->fdct = FDC_I82077;
748 device_set_desc(dev, "NEC 72065B or clone");
749 fdc->fdct = FDC_NE72065;
752 device_set_desc(dev, "generic floppy controller");
753 fdc->fdct = FDC_UNKNOWN;
759 fdc_release_resources(fdc);
764 * Add a child device to the fdc controller. It will then be probed etc.
767 fdc_add_child(device_t dev, const char *name, int unit)
770 struct fdc_ivars *ivar;
773 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
774 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
776 child = device_add_child(dev, name, unit);
779 device_set_ivars(child, ivar);
780 if (resource_int_value(name, unit, "disabled", &disabled) == 0
782 device_disable(child);
786 fdc_attach(device_t dev)
788 struct fdc_data *fdc;
791 fdc = device_get_softc(dev);
793 callout_init(&fdc->pseudointr_ch);
795 error = fdc_alloc_resources(fdc);
797 device_printf(dev, "cannot re-aquire resources\n");
800 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
802 &fdc->fdc_intr, NULL);
804 device_printf(dev, "cannot setup interrupt\n");
807 fdc->fdcu = device_get_unit(dev);
808 fdc->flags |= FDC_ATTACHED;
810 if ((fdc->flags & FDC_NODMA) == 0) {
811 /* Acquire the DMA channel forever, The driver will do the rest */
812 /* XXX should integrate with rman */
813 isa_dma_acquire(fdc->dmachan);
814 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
816 fdc->state = DEVIDLE;
818 /* reset controller, turn motor off, clear fdout mirror reg */
819 fdout_wr(fdc, ((fdc->fdout = 0)));
820 bioq_init(&fdc->bio_queue);
823 * Probe and attach any children. We should probably detect
824 * devices from the BIOS unless overridden.
826 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
828 i = resource_query_string(i, "at", device_get_nameunit(dev)))
829 fdc_add_child(dev, resource_query_name(i),
830 resource_query_unit(i));
832 return (bus_generic_attach(dev));
836 fdc_print_child(device_t me, device_t child)
840 retval += bus_print_child_header(me, child);
841 retval += printf(" on %s drive %d\n", device_get_nameunit(me),
842 fdc_get_fdunit(child));
847 static device_method_t fdc_methods[] = {
848 /* Device interface */
849 DEVMETHOD(device_probe, fdc_probe),
850 DEVMETHOD(device_attach, fdc_attach),
851 DEVMETHOD(device_detach, bus_generic_detach),
852 DEVMETHOD(device_shutdown, bus_generic_shutdown),
853 DEVMETHOD(device_suspend, bus_generic_suspend),
854 DEVMETHOD(device_resume, bus_generic_resume),
857 DEVMETHOD(bus_print_child, fdc_print_child),
858 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
859 /* Our children never use any other bus interface methods. */
864 static driver_t fdc_driver = {
867 sizeof(struct fdc_data)
870 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
872 /******************************************************************/
874 * devices attached to the controller section.
877 fd_probe(device_t dev)
882 struct fdc_data *fdc;
884 static int fd_fifo = 0;
886 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
887 fd = device_get_softc(dev);
888 fdc = device_get_softc(device_get_parent(dev));
890 bzero(fd, sizeof *fd);
894 fd->fdu = device_get_unit(dev);
897 /* look up what bios thinks we have */
900 if ((fdc->flags & FDC_ISPCMCIA))
902 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
903 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
905 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
908 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
915 fdt = RTCFDT_144M; /* XXX probably */
918 /* is there a unit? */
919 if (fdt == RTCFDT_NONE)
923 set_motor(fdc, fdsu, TURNON);
924 DELAY(1000000); /* 1 sec */
926 /* XXX This doesn't work before the first set_motor() */
927 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
928 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
929 && enable_fifo(fdc) == 0) {
930 device_printf(device_get_parent(dev),
931 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
935 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
936 && (st3 & NE7_ST3_T0)) {
937 /* if at track 0, first seek inwards */
938 /* seek some steps: */
939 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
940 DELAY(300000); /* ...wait a moment... */
941 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
944 /* If we're at track 0 first seek inwards. */
945 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
946 /* Seek some steps... */
947 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
948 /* ...wait a moment... */
950 /* make ctrlr happy: */
951 fd_sense_int(fdc, 0, 0);
955 for (i = 0; i < 2; i++) {
957 * we must recalibrate twice, just in case the
958 * heads have been beyond cylinder 76, since most
959 * FDCs still barf when attempting to recalibrate
963 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
964 /* a second being enough for full stroke seek*/
965 DELAY(i == 0 ? 1000000 : 300000);
967 /* anything responding? */
968 if (fd_sense_int(fdc, &st0, 0) == 0 &&
969 (st0 & NE7_ST0_EC) == 0)
970 break; /* already probed succesfully */
974 set_motor(fdc, fdsu, TURNOFF);
976 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
979 fd->track = FD_NO_TRACK;
983 callout_init(&fd->toffhandle);
984 callout_init(&fd->tohandle);
985 callout_init(&fd->motor);
989 device_set_desc(dev, "1200-KB 5.25\" drive");
992 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
993 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
997 device_set_desc(dev, "1440-KB 3.5\" drive");
1002 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
1006 device_set_desc(dev, "360-KB 5.25\" drive");
1010 printf("720-KB 3.5\" drive");
1020 fd_attach(device_t dev)
1030 fd = device_get_softc(dev);
1032 cdevsw_add(&fd_cdevsw, -1 << 6, fd->fdu << 6);
1033 make_dev(&fd_cdevsw, (fd->fdu << 6),
1034 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu);
1037 /* Other make_dev() go here. */
1041 * Export the drive to the devstat interface.
1043 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1044 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1045 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1046 DEVSTAT_PRIORITY_FD);
1051 fd_detach(device_t dev)
1055 fd = device_get_softc(dev);
1056 callout_stop(&fd->toffhandle);
1057 callout_stop(&fd->motor);
1062 static device_method_t fd_methods[] = {
1063 /* Device interface */
1064 DEVMETHOD(device_probe, fd_probe),
1065 DEVMETHOD(device_attach, fd_attach),
1066 DEVMETHOD(device_detach, fd_detach),
1067 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1068 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1069 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1074 static driver_t fd_driver = {
1077 sizeof(struct fd_data)
1080 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1082 /****************************************************************************/
1083 /* motor control stuff */
1084 /* remember to not deselect the drive we're working on */
1085 /****************************************************************************/
1087 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1089 int fdout = fdc->fdout;
1090 int needspecify = 0;
1093 fdout &= ~FDO_FDSEL;
1094 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1096 fdout &= ~(FDO_MOEN0 << fdsu);
1099 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1100 /* gonna turn off the last drive, put FDC to bed */
1101 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1103 /* make sure controller is selected and specified */
1104 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1106 fdout |= (FDO_FRST|FDO_FDMAEN);
1109 fdout_wr(fdc, fdout);
1111 TRACE1("[0x%x->FDOUT]", fdout);
1116 * special case: since we have just woken up the FDC
1117 * from its sleep, we silently assume the command will
1118 * be accepted, and do not test for a timeout
1120 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1121 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1123 if (fdc->flags & FDC_HAS_FIFO)
1124 (void) enable_fifo(fdc);
1129 fd_turnoff(void *xfd)
1133 TRACE1("[fd%d: turnoff]", fd->fdu);
1137 * Don't turn off the motor yet if the drive is active.
1139 * If we got here, this could only mean we missed an interrupt.
1140 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1141 * after a controller reset. Just schedule a pseudo-interrupt
1142 * so the state machine gets re-entered.
1144 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1150 fd->flags &= ~FD_MOTOR;
1151 set_motor(fd->fdc, fd->fdsu, TURNOFF);
1156 fd_motor_on(void *xfd)
1161 fd->flags &= ~FD_MOTOR_WAIT;
1162 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1172 if(!(fd->flags & FD_MOTOR))
1174 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1175 set_motor(fd->fdc, fd->fdsu, TURNON);
1176 callout_reset(&fd->motor, hz, fd_motor_on, fd);
1181 fdc_reset(fdc_p fdc)
1183 /* Try a reset, keep motor on */
1184 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1185 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1187 /* enable FDC, but defer interrupts a moment */
1188 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1189 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1191 fdout_wr(fdc, fdc->fdout);
1192 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1194 /* XXX after a reset, silently believe the FDC will accept commands */
1195 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1196 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1198 if (fdc->flags & FDC_HAS_FIFO)
1199 (void) enable_fifo(fdc);
1202 /****************************************************************************/
1204 /****************************************************************************/
1206 * FDC IO functions, take care of the main status register, timeout
1207 * in case the desired status bits are never set.
1209 * These PIO loops initially start out with short delays between
1210 * each iteration in the expectation that the required condition
1211 * is usually met quickly, so it can be handled immediately. After
1212 * about 1 ms, stepping is increased to achieve a better timing
1213 * accuracy in the calls to DELAY().
1216 fd_in(struct fdc_data *fdc, int *ptr)
1220 for (j = 0, step = 1;
1221 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1225 return (fdc_err(fdc, "ready for output in input\n"));
1230 if (j >= FDSTS_TIMEOUT)
1231 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1234 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1237 #else /* !FDC_DEBUG */
1242 #endif /* FDC_DEBUG */
1246 out_fdc(struct fdc_data *fdc, int x)
1250 for (j = 0, step = 1;
1251 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1254 if (i == (NE7_DIO|NE7_RQM))
1255 return (fdc_err(fdc, "ready for input in output\n"));
1260 if (j >= FDSTS_TIMEOUT)
1261 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1263 /* Send the command and return */
1265 TRACE1("[0x%x->FDDATA]", x);
1269 /****************************************************************************/
1270 /* fdopen/fdclose */
1271 /****************************************************************************/
1273 Fdopen(dev_t dev, int flags, int mode, struct thread *td)
1275 fdu_t fdu = FDUNIT(minor(dev));
1276 int type = FDTYPE(minor(dev));
1281 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1284 if ((fdc == NULL) || (fd->type == NO_TYPE))
1292 * For each type of basic drive, make sure we are trying
1293 * to open a type it can do,
1295 if (type != fd->type) {
1309 type = FD_1480in5_25;
1312 type = FD_1440in5_25;
1317 type = FD_820in5_25;
1320 type = FD_800in5_25;
1323 type = FD_720in5_25;
1326 type = FD_640in5_25;
1329 type = FD_360in5_25;
1336 if ( type != FD_1720
1349 fd->ft = fd_types + type - 1;
1350 fd->flags |= FD_OPEN;
1352 * Clearing the DMA overrun counter at open time is a bit messy.
1353 * Since we're only managing one counter per controller, opening
1354 * the second drive could mess it up. Anyway, if the DMA overrun
1355 * condition is really persistent, it will eventually time out
1356 * still. OTOH, clearing it here will ensure we'll at least start
1357 * trying again after a previous (maybe even long ago) failure.
1358 * Also, this is merely a stop-gap measure only that should not
1359 * happen during normal operation, so we can tolerate it to be a
1360 * bit sloppy about this.
1362 fdc->dma_overruns = 0;
1368 fdclose(dev_t dev, int flags, int mode, struct thread *td)
1370 fdu_t fdu = FDUNIT(minor(dev));
1373 fd = devclass_get_softc(fd_devclass, fdu);
1374 fd->flags &= ~FD_OPEN;
1375 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1380 /****************************************************************************/
1382 /****************************************************************************/
1384 fdstrategy(dev_t dev, struct bio *bio)
1386 struct buf *bp = bio->bio_buf;
1387 unsigned nblocks, blknum, cando;
1393 fdu = FDUNIT(minor(dev));
1394 fd = devclass_get_softc(fd_devclass, fdu);
1396 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1397 (u_long)major(dev), (u_long)minor(dev));
1399 if (fd->type == NO_TYPE) {
1400 bp->b_error = ENXIO;
1401 bp->b_flags |= B_ERROR;
1405 fdblk = 128 << (fd->ft->secsize);
1406 if (!(bp->b_flags & B_FORMAT)) {
1407 if (bio->bio_offset < 0) {
1409 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n",
1410 fdu, bio->bio_offset, bp->b_bcount);
1411 bp->b_error = EINVAL;
1412 bp->b_flags |= B_ERROR;
1415 if ((bp->b_bcount % fdblk) != 0) {
1416 bp->b_error = EINVAL;
1417 bp->b_flags |= B_ERROR;
1423 * Set up block calculations.
1425 if (bio->bio_offset > 20000000LL * fdblk) {
1427 * Reject unreasonably high block number, prevent the
1428 * multiplication below from overflowing.
1430 bp->b_error = EINVAL;
1431 bp->b_flags |= B_ERROR;
1434 blknum = (unsigned)(bio->bio_offset / fdblk);
1435 nblocks = fd->ft->size;
1437 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1438 if (blknum <= nblocks) {
1439 cando = (nblocks - blknum) * fdblk;
1440 bp->b_resid = bp->b_bcount - cando;
1442 goto bad; /* not actually bad but EOF */
1444 bp->b_error = EINVAL;
1445 bp->b_flags |= B_ERROR;
1450 bio->bio_driver_info = dev;
1451 bioqdisksort(&fdc->bio_queue, bio);
1452 callout_stop(&fd->toffhandle);
1454 /* Tell devstat we are starting on the transaction */
1455 devstat_start_transaction(&fd->device_stats);
1456 device_busy(fd->dev);
1466 /***************************************************************\
1468 * We have just queued something.. if the controller is not busy *
1469 * then simulate the case where it has just finished a command *
1470 * So that it (the interrupt routine) looks on the queue for more*
1471 * work to do and picks up what we just added. *
1472 * If the controller is already busy, we need do nothing, as it *
1473 * will pick up our work when the present work completes *
1474 \***************************************************************/
1476 fdstart(struct fdc_data *fdc)
1479 if(fdc->state == DEVIDLE)
1487 fd_iotimeout(void *xfdc)
1492 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1495 * Due to IBM's brain-dead design, the FDC has a faked ready
1496 * signal, hardwired to ready == true. Thus, any command
1497 * issued if there's no diskette in the drive will _never_
1498 * complete, and must be aborted by resetting the FDC.
1499 * Many thanks, Big Blue!
1500 * The FDC must not be reset directly, since that would
1501 * interfere with the state machine. Instead, pretend that
1502 * the command completed but was invalid. The state machine
1503 * will reset the FDC and retry once.
1506 fdc->status[0] = NE7_ST0_IC_IV;
1507 fdc->flags &= ~FDC_STAT_VALID;
1508 fdc->state = IOTIMEDOUT;
1513 /* just ensure it is running in a critical section */
1515 fd_pseudointr(void *xfdc)
1522 /***********************************************************************\
1524 * keep calling the state machine until it returns a 0 *
1525 * ALWAYS called at SPLBIO *
1526 \***********************************************************************/
1528 fdc_intr(void *xfdc)
1536 * magic pseudo-DMA initialization for YE FDC. Sets count and
1539 #define SET_BCDR(fdc,wr,cnt,port) \
1540 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1541 ((cnt)-1) & 0xff); \
1542 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1543 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1546 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1548 static int fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count)
1550 u_char *cptr = (u_char *)addr;
1552 if (flags & B_READ) {
1553 if (fdc->state != PIOREAD) {
1554 fdc->state = PIOREAD;
1557 SET_BCDR(fdc, 0, count, 0);
1558 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1559 FDC_YE_DATAPORT, cptr, count);
1561 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1562 FDC_YE_DATAPORT, cptr, count);
1563 SET_BCDR(fdc, 0, count, 0);
1568 /***********************************************************************\
1569 * The controller state machine. *
1570 * if it returns a non zero value, it should be called again immediatly *
1571 \***********************************************************************/
1575 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1576 unsigned blknum = 0, b_cylinder = 0;
1577 fdu_t fdu = fdc->fdu;
1581 struct fd_formb *finfo = NULL;
1587 bio = bioq_first(&fdc->bio_queue);
1589 bioq_remove(&fdc->bio_queue, bio);
1594 /***********************************************\
1595 * nothing left for this controller to do *
1596 * Force into the IDLE state, *
1597 \***********************************************/
1598 fdc->state = DEVIDLE;
1600 device_printf(fdc->fdc_dev,
1601 "unexpected valid fd pointer\n");
1605 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1609 dev = bio->bio_driver_info;
1611 fdu = FDUNIT(minor(dev));
1612 fd = devclass_get_softc(fd_devclass, fdu);
1613 fdblk = 128 << fd->ft->secsize;
1614 if (fdc->fd && (fd != fdc->fd))
1615 device_printf(fd->dev, "confused fd pointers\n");
1616 read = bp->b_flags & B_READ;
1617 format = bp->b_flags & B_FORMAT;
1619 finfo = (struct fd_formb *)bp->b_data;
1620 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1623 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1624 blknum = (unsigned)(bio->bio_offset / fdblk) +
1626 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1628 TRACE1("fd%d", fdu);
1629 TRACE1("[%s]", fdstates[fdc->state]);
1630 TRACE1("(0x%x)", fd->flags);
1631 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
1635 case FINDWORK: /* we have found new work */
1640 fdc->fdctl_wr(fdc, fd->ft->trans);
1641 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1642 /*******************************************************\
1643 * If the next drive has a motor startup pending, then *
1644 * it will start up in its own good time *
1645 \*******************************************************/
1646 if(fd->flags & FD_MOTOR_WAIT) {
1647 fdc->state = MOTORWAIT;
1648 return (0); /* come back later */
1650 /*******************************************************\
1651 * Maybe if it's not starting, it SHOULD be starting *
1652 \*******************************************************/
1653 if (!(fd->flags & FD_MOTOR))
1655 fdc->state = MOTORWAIT;
1659 else /* at least make sure we are selected */
1661 set_motor(fdc, fd->fdsu, TURNON);
1663 if (fdc->flags & FDC_NEEDS_RESET) {
1664 fdc->state = RESETCTLR;
1665 fdc->flags &= ~FDC_NEEDS_RESET;
1667 fdc->state = DOSEEK;
1670 if (b_cylinder == (unsigned)fd->track)
1672 fdc->state = SEEKCOMPLETE;
1675 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1676 fd->fdsu, b_cylinder * fd->ft->steptrac,
1680 * seek command not accepted, looks like
1681 * the FDC went off to the Saints...
1683 fdc->retry = 6; /* try a reset */
1684 return(retrier(fdc));
1686 fd->track = FD_NO_TRACK;
1687 fdc->state = SEEKWAIT;
1688 return(0); /* will return later */
1690 /* allow heads to settle */
1691 callout_reset(&fdc->pseudointr_ch, hz / 16,
1692 fd_pseudointr, fdc);
1693 fdc->state = SEEKCOMPLETE;
1694 return(0); /* will return later */
1695 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1696 /* Make sure seek really happened*/
1697 if(fd->track == FD_NO_TRACK) {
1698 int descyl = b_cylinder * fd->ft->steptrac;
1701 * This might be a "ready changed" interrupt,
1702 * which cannot really happen since the
1703 * RDY pin is hardwired to + 5 volts. This
1704 * generally indicates a "bouncing" intr
1705 * line, so do one of the following:
1707 * When running on an enhanced FDC that is
1708 * known to not go stuck after responding
1709 * with INVALID, fetch all interrupt states
1710 * until seeing either an INVALID or a
1711 * real interrupt condition.
1713 * When running on a dumb old NE765, give
1714 * up immediately. The controller will
1715 * provide up to four dummy RC interrupt
1716 * conditions right after reset (for the
1717 * corresponding four drives), so this is
1718 * our only chance to get notice that it
1719 * was not the FDC that caused the interrupt.
1721 if (fd_sense_int(fdc, &st0, &cyl)
1724 if(fdc->fdct == FDC_NE765
1725 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1726 return 0; /* hope for a real intr */
1727 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1732 * seek to cyl 0 requested; make sure we are
1735 if (fd_sense_drive_status(fdc, &st3))
1737 if ((st3 & NE7_ST3_T0) == 0) {
1739 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1740 fdu, st3, NE7_ST3BITS);
1747 return (retrier(fdc));
1751 if (cyl != descyl) {
1753 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1754 fdu, descyl, cyl, st0);
1757 return (retrier(fdc));
1761 fd->track = b_cylinder;
1762 if (!(fdc->flags & FDC_NODMA))
1763 isa_dmastart(bp->b_flags, bp->b_data+fd->skip,
1764 format ? bp->b_bcount : fdblk, fdc->dmachan);
1765 sectrac = fd->ft->sectrac;
1766 sec = blknum % (sectrac * fd->ft->heads);
1767 head = sec / sectrac;
1768 sec = sec % sectrac + 1;
1769 fd->hddrv = ((head&1)<<2)+fdu;
1773 /* make sure the drive is writable */
1774 if(fd_sense_drive_status(fdc, &st3) != 0)
1776 /* stuck controller? */
1777 if (!(fdc->flags & FDC_NODMA))
1778 isa_dmadone(bp->b_flags,
1779 bp->b_data + fd->skip,
1780 format ? bp->b_bcount : fdblk,
1782 fdc->retry = 6; /* reset the beast */
1783 return (retrier(fdc));
1785 if(st3 & NE7_ST3_WP)
1788 * XXX YES! this is ugly.
1789 * in order to force the current operation
1790 * to fail, we will have to fake an FDC
1791 * error - all error handling is done
1794 fdc->status[0] = NE7_ST0_IC_AT;
1795 fdc->status[1] = NE7_ST1_NW;
1797 fdc->status[3] = fd->track;
1798 fdc->status[4] = head;
1799 fdc->status[5] = sec;
1800 fdc->retry = 8; /* break out immediately */
1801 fdc->state = IOTIMEDOUT; /* not really... */
1807 if (fdc->flags & FDC_NODMA) {
1809 * This seems to be necessary for
1810 * whatever obscure reason; if we omit
1811 * it, we end up filling the sector ID
1812 * fields of the newly formatted track
1813 * entirely with garbage, causing
1814 * `wrong cylinder' errors all over
1815 * the place when trying to read them
1820 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1822 (void)fdcpio(fdc,bp->b_flags,
1823 bp->b_data+fd->skip,
1828 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1829 finfo->fd_formb_secshift,
1830 finfo->fd_formb_nsecs,
1831 finfo->fd_formb_gaplen,
1832 finfo->fd_formb_fillbyte, 0)) {
1833 /* controller fell over */
1834 if (!(fdc->flags & FDC_NODMA))
1835 isa_dmadone(bp->b_flags,
1836 bp->b_data + fd->skip,
1837 format ? bp->b_bcount : fdblk,
1840 return (retrier(fdc));
1843 if (fdc->flags & FDC_NODMA) {
1845 * this seems to be necessary even when
1848 SET_BCDR(fdc, 1, fdblk, 0);
1851 * perform the write pseudo-DMA before
1852 * the WRITE command is sent
1855 (void)fdcpio(fdc,bp->b_flags,
1856 bp->b_data+fd->skip,
1860 (read ? NE7CMD_READ : NE7CMD_WRITE),
1861 head << 2 | fdu, /* head & unit */
1862 fd->track, /* track */
1864 sec, /* sector + 1 */
1865 fd->ft->secsize, /* sector size */
1866 sectrac, /* sectors/track */
1867 fd->ft->gap, /* gap size */
1868 fd->ft->datalen, /* data length */
1870 /* the beast is sleeping again */
1871 if (!(fdc->flags & FDC_NODMA))
1872 isa_dmadone(bp->b_flags,
1873 bp->b_data + fd->skip,
1874 format ? bp->b_bcount : fdblk,
1877 return (retrier(fdc));
1880 if (fdc->flags & FDC_NODMA)
1882 * if this is a read, then simply await interrupt
1883 * before performing PIO
1885 if (read && !fdcpio(fdc,bp->b_flags,
1886 bp->b_data+fd->skip,fdblk)) {
1887 callout_reset(&fd->tohandle, hz,
1889 return(0); /* will return later */
1893 * write (or format) operation will fall through and
1894 * await completion interrupt
1896 fdc->state = IOCOMPLETE;
1897 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
1898 return (0); /* will return later */
1901 * actually perform the PIO read. The IOCOMPLETE case
1902 * removes the timeout for us.
1904 (void)fdcpio(fdc,bp->b_flags,bp->b_data+fd->skip,fdblk);
1905 fdc->state = IOCOMPLETE;
1907 case IOCOMPLETE: /* IO DONE, post-analyze */
1908 callout_stop(&fd->tohandle);
1910 if (fd_read_status(fdc, fd->fdsu)) {
1911 if (!(fdc->flags & FDC_NODMA))
1912 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1913 format ? bp->b_bcount : fdblk,
1916 fdc->retry = 6; /* force a reset */
1917 return (retrier(fdc));
1920 fdc->state = IOTIMEDOUT;
1925 if (!(fdc->flags & FDC_NODMA))
1926 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1927 format ? bp->b_bcount : fdblk, fdc->dmachan);
1928 if (fdc->status[0] & NE7_ST0_IC) {
1929 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1930 && fdc->status[1] & NE7_ST1_OR) {
1932 * DMA overrun. Someone hogged the bus and
1933 * didn't release it in time for the next
1936 * We normally restart this without bumping
1937 * the retry counter. However, in case
1938 * something is seriously messed up (like
1939 * broken hardware), we rather limit the
1940 * number of retries so the IO operation
1941 * doesn't block indefinately.
1943 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
1944 fdc->state = SEEKCOMPLETE;
1946 } /* else fall through */
1948 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
1950 fdc->retry = 6; /* force a reset */
1951 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1952 && fdc->status[2] & NE7_ST2_WC
1954 fdc->retry = 3; /* force recalibrate */
1955 return (retrier(fdc));
1958 /* Operation successful, retry DMA overruns again next time. */
1959 fdc->dma_overruns = 0;
1961 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
1962 /* set up next transfer */
1963 fdc->state = DOSEEK;
1968 device_unbusy(fd->dev);
1969 devstat_end_transaction_buf(&fd->device_stats, bp);
1973 fdc->state = FINDWORK;
1979 fdc->state = RESETCOMPLETE;
1983 * Discard all the results from the reset so that they
1984 * can't cause an unexpected interrupt later.
1986 for (i = 0; i < 4; i++)
1987 (void)fd_sense_int(fdc, &st0, &cyl);
1988 fdc->state = STARTRECAL;
1991 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
1994 return (retrier(fdc));
1996 fdc->state = RECALWAIT;
1997 return (0); /* will return later */
1999 /* allow heads to settle */
2000 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
2001 fdc->state = RECALCOMPLETE;
2002 return (0); /* will return later */
2006 * See SEEKCOMPLETE for a comment on this:
2008 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2010 if(fdc->fdct == FDC_NE765
2011 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2012 return 0; /* hope for a real intr */
2013 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2014 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2018 * a recalibrate from beyond cylinder 77
2019 * will "fail" due to the FDC limitations;
2020 * since people used to complain much about
2021 * the failure message, try not logging
2022 * this one if it seems to be the first
2025 printf("fd%d: recal failed ST0 %b cyl %d\n",
2026 fdu, st0, NE7_ST0BITS, cyl);
2027 if(fdc->retry < 3) fdc->retry = 3;
2028 return (retrier(fdc));
2031 /* Seek (probably) necessary */
2032 fdc->state = DOSEEK;
2033 return (1); /* will return immediatly */
2035 if(fd->flags & FD_MOTOR_WAIT)
2037 return (0); /* time's not up yet */
2039 if (fdc->flags & FDC_NEEDS_RESET) {
2040 fdc->state = RESETCTLR;
2041 fdc->flags &= ~FDC_NEEDS_RESET;
2044 * If all motors were off, then the controller was
2045 * reset, so it has lost track of the current
2046 * cylinder. Recalibrate to handle this case.
2047 * But first, discard the results of the reset.
2049 fdc->state = RESETCOMPLETE;
2051 return (1); /* will return immediatly */
2053 device_printf(fdc->fdc_dev, "unexpected FD int->");
2054 if (fd_read_status(fdc, fd->fdsu) == 0)
2055 printf("FDC status :%x %x %x %x %x %x %x ",
2064 printf("No status available ");
2065 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2067 printf("[controller is dead now]\n");
2070 printf("ST0 = %x, PCN = %x\n", st0, cyl);
2073 /*XXX confusing: some branches return immediately, others end up here*/
2074 return (1); /* Come back immediatly to new state */
2078 retrier(struct fdc_data *fdc)
2088 dev = bio->bio_driver_info;
2090 /* XXX shouldn't this be cached somewhere? */
2091 fdu = FDUNIT(minor(dev));
2092 fd = devclass_get_softc(fd_devclass, fdu);
2093 if (fd->options & FDOPT_NORETRY)
2096 switch (fdc->retry) {
2097 case 0: case 1: case 2:
2098 fdc->state = SEEKCOMPLETE;
2100 case 3: case 4: case 5:
2101 fdc->state = STARTRECAL;
2104 fdc->state = RESETCTLR;
2111 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2115 * note: use the correct device for more
2116 * verbose error reporting.
2120 subdev = make_sub_dev(dev,
2121 (FDUNIT(minor(dev))<<3)|RAW_PART);
2122 diskerr(bio, subdev,
2123 "hard error", LOG_PRINTF,
2124 fdc->fd->skip, NULL);
2127 if (fdc->flags & FDC_STAT_VALID)
2129 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2130 fdc->status[0], NE7_ST0BITS,
2131 fdc->status[1], NE7_ST1BITS,
2132 fdc->status[2], NE7_ST2BITS,
2133 fdc->status[3], fdc->status[4],
2136 printf(" (No status)\n");
2139 bp->b_flags |= B_ERROR;
2141 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2144 device_unbusy(fd->dev);
2145 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2147 fdc->state = FINDWORK;
2148 fdc->flags |= FDC_NEEDS_RESET;
2158 fdformat(dev_t dev, struct fd_formb *finfo, struct thread *td)
2167 fdu = FDUNIT(minor(dev));
2168 fd = devclass_get_softc(fd_devclass, fdu);
2169 fdblk = 128 << fd->ft->secsize;
2171 /* set up a buffer header for fdstrategy() */
2172 bp = malloc(sizeof(struct buf), M_TEMP, M_WAITOK | M_ZERO);
2175 BUF_LOCK(bp, LK_EXCLUSIVE);
2177 bp->b_flags = B_PHYS | B_FORMAT;
2180 * calculate a fake blkno, so fdstrategy() would initiate a
2181 * seek to the requested cylinder
2183 bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
2184 (fd->ft->sectrac * fd->ft->heads)
2185 + finfo->head * fd->ft->sectrac) * fdblk;
2186 bp->b_bio1.bio_driver_info = dev;
2188 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2189 bp->b_data = (caddr_t)finfo;
2191 /* now do the format */
2192 dev_dstrategy(dev, &bp->b_bio1);
2194 /* ...and wait for it to complete */
2196 while(!(bp->b_flags & B_DONE)) {
2197 rv = tsleep((caddr_t)bp, 0, "fdform", 20 * hz);
2198 if (rv == EWOULDBLOCK)
2203 if (rv == EWOULDBLOCK) {
2206 device_unbusy(fd->dev);
2207 biodone(&bp->b_bio1);
2209 if (bp->b_flags & B_ERROR)
2212 * allow the process to be swapped
2221 * TODO: don't allocate buffer on stack.
2225 fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
2227 fdu_t fdu = FDUNIT(minor(dev));
2228 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2231 struct fd_type *fdt;
2232 struct disklabel *dl;
2233 struct fdc_status *fsp;
2234 char buffer[DEV_BSIZE];
2237 fdblk = 128 << fd->ft->secsize;
2241 bzero(buffer, sizeof (buffer));
2242 dl = (struct disklabel *)buffer;
2243 dl->d_secsize = fdblk;
2245 dl->d_secpercyl = fdt->size / fdt->tracks;
2246 dl->d_type = DTYPE_FLOPPY;
2248 if (readdisklabel(dev, dl)
2254 *(struct disklabel *)addr = *dl;
2258 if ((flag & FWRITE) == 0)
2263 if ((flag & FWRITE) == 0)
2268 if ((flag & FWRITE) == 0) {
2273 dl = (struct disklabel *)addr;
2275 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2279 error = writedisklabel(dev, (struct disklabel *)buffer);
2282 if ((flag & FWRITE) == 0)
2283 error = EBADF; /* must be opened for writing */
2284 else if (((struct fd_formb *)addr)->format_version !=
2286 error = EINVAL; /* wrong version of formatting prog */
2288 error = fdformat(dev, (struct fd_formb *)addr, td);
2291 case FD_GTYPE: /* get drive type */
2292 *(struct fd_type *)addr = *fd->ft;
2295 case FD_STYPE: /* set drive type */
2296 /* this is considered harmful; only allow for superuser */
2299 *fd->ft = *(struct fd_type *)addr;
2302 case FD_GOPTS: /* get drive options */
2303 *(int *)addr = fd->options;
2306 case FD_SOPTS: /* set drive options */
2307 fd->options = *(int *)addr;
2311 fsp = (struct fdc_status *)addr;
2312 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2314 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2325 * Hello emacs, these are the
2328 * c-continued-statement-offset: 8
2329 * c-continued-brace-offset: 0
2330 * c-brace-offset: -8
2331 * c-brace-imaginary-offset: 0
2332 * c-argdecl-indent: 8
2333 * c-label-offset: -8
2334 * c++-hanging-braces: 1
2335 * c++-access-specifier-offset: -8
2336 * c++-empty-arglist-indent: 8
2337 * c++-friend-offset: 0