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 1.34 2006/10/25 20:55:53 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>
79 #include <sys/thread2.h>
81 #include <machine/clock.h>
82 #include <machine/ioctl_fd.h>
83 #include <machine/stdarg.h>
85 #include <bus/isa/isavar.h>
86 #include <bus/isa/isareg.h>
89 #include <bus/isa/rtc.h>
91 /* configuration flags */
92 #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
93 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
95 /* internally used only, not really from CMOS: */
96 #define RTCFDT_144M_PRETENDED 0x1000
98 /* error returns for fd_cmd() */
100 #define FD_NOT_VALID -2
101 #define FDC_ERRMAX 100 /* do not log more */
103 * Stop retrying after this many DMA overruns. Since each retry takes
104 * one revolution, with 300 rpm., 25 retries take approximately 10
105 * seconds which the read attempt will block in case the DMA overrun
108 #define FDC_DMAOV_MAX 25
111 * Timeout value for the PIO loops to wait until the FDC main status
112 * register matches our expectations (request for master, direction
113 * bit). This is supposed to be a number of microseconds, although
114 * timing might actually not be very accurate.
116 * Timeouts of 100 msec are believed to be required for some broken
119 #define FDSTS_TIMEOUT 100000
122 #define NUMDENS (NUMTYPES - 7)
124 /* These defines (-1) must match index for fd_types */
125 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
126 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */
138 #define FD_1480in5_25 11
139 #define FD_1440in5_25 12
140 #define FD_820in5_25 13
141 #define FD_800in5_25 14
142 #define FD_720in5_25 15
143 #define FD_360in5_25 16
144 #define FD_640in5_25 17
147 static struct fd_type fd_types[NUMTYPES] =
149 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
150 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
151 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
152 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
153 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
154 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
155 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
156 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
157 { 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
158 { 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
160 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
161 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
162 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
163 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
164 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
165 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
166 { 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
169 #define DRVS_PER_CTLR 2 /* 2 floppies */
171 /***********************************************************************\
172 * Per controller structure. *
173 \***********************************************************************/
174 devclass_t fdc_devclass;
176 /***********************************************************************\
177 * Per drive structure. *
178 * N per controller (DRVS_PER_CTLR) *
179 \***********************************************************************/
181 struct fdc_data *fdc; /* pointer to controller structure */
182 int fdsu; /* this units number on this controller */
183 int type; /* Drive type (FD_1440...) */
184 struct fd_type *ft; /* pointer to the type descriptor */
186 #define FD_OPEN 0x01 /* it's open */
187 #define FD_ACTIVE 0x02 /* it's active */
188 #define FD_MOTOR 0x04 /* motor should be on */
189 #define FD_MOTOR_WAIT 0x08 /* motor coming up */
192 #define FD_NO_TRACK -2
193 int track; /* where we think the head is */
194 int options; /* user configurable options, see ioctl_fd.h */
195 struct callout toffhandle;
196 struct callout tohandle;
197 struct callout motor;
198 struct devstat device_stats;
206 static devclass_t fd_devclass;
208 /***********************************************************************\
209 * Throughout this file the following conventions will be used: *
210 * fd is a pointer to the fd_data struct for the drive in question *
211 * fdc is a pointer to the fdc_data struct for the controller *
212 * fdu is the floppy drive unit number *
213 * fdcu is the floppy controller unit number *
214 * fdsu is the floppy drive unit number on that controller. (sub-unit) *
215 \***********************************************************************/
217 /* internal functions */
218 static void fdc_intr(void *);
219 static void set_motor(struct fdc_data *, int, int);
222 static timeout_t fd_turnoff;
223 static timeout_t fd_motor_on;
224 static void fd_turnon(struct fd_data *);
225 static void fdc_reset(fdc_p);
226 static int fd_in(struct fdc_data *, int *);
227 static int out_fdc(struct fdc_data *, int);
228 static void fdstart(struct fdc_data *);
229 static timeout_t fd_iotimeout;
230 static timeout_t fd_pseudointr;
231 static int fdstate(struct fdc_data *);
232 static int retrier(struct fdc_data *);
233 static int fdformat(cdev_t, struct fd_formb *, struct ucred *);
235 static int enable_fifo(fdc_p fdc);
237 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
243 #define SEEKCOMPLETE 3
245 #define RECALCOMPLETE 5
251 #define IOTIMEDOUT 11
252 #define RESETCOMPLETE 12
256 static char const * const fdstates[] =
274 /* CAUTION: fd_debug causes huge amounts of logging output */
275 static int volatile fd_debug = 0;
276 #define TRACE0(arg) if(fd_debug) printf(arg)
277 #define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2)
278 #else /* FDC_DEBUG */
280 #define TRACE1(arg1, arg2)
281 #endif /* FDC_DEBUG */
284 fdout_wr(fdc_p fdc, u_int8_t v)
286 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
292 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
296 fddata_wr(fdc_p fdc, u_int8_t v)
298 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
304 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
308 fdctl_wr_isa(fdc_p fdc, u_int8_t v)
310 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
318 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
323 static d_open_t Fdopen; /* NOTE, not fdopen */
324 static d_close_t fdclose;
325 static d_ioctl_t fdioctl;
326 static d_strategy_t fdstrategy;
328 static struct dev_ops fd_ops = {
329 { "fd", FD_CDEV_MAJOR, D_DISK },
333 .d_write = physwrite,
335 .d_strategy = fdstrategy,
339 fdc_err(struct fdc_data *fdc, const char *s)
343 if (fdc->fdc_errs < FDC_ERRMAX)
344 device_printf(fdc->fdc_dev, "%s", s);
345 else if (fdc->fdc_errs == FDC_ERRMAX)
346 device_printf(fdc->fdc_dev, "too many errors, not "
347 "logging any more\n");
354 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
356 * # of output bytes, output bytes as ints ...,
357 * # of input bytes, input bytes as ints ...
360 fd_cmd(struct fdc_data *fdc, int n_out, ...)
367 __va_start(ap, n_out);
368 cmd = (u_char)(__va_arg(ap, int));
370 __va_start(ap, n_out);
371 for (n = 0; n < n_out; n++)
373 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
376 snprintf(msg, sizeof(msg),
377 "cmd %x failed at out byte %d of %d\n",
379 return fdc_err(fdc, msg);
382 n_in = __va_arg(ap, int);
383 for (n = 0; n < n_in; n++)
385 int *ptr = __va_arg(ap, int *);
386 if (fd_in(fdc, ptr) < 0)
389 snprintf(msg, sizeof(msg),
390 "cmd %02x failed at in byte %d of %d\n",
392 return fdc_err(fdc, msg);
400 enable_fifo(fdc_p fdc)
404 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
408 * Cannot use fd_cmd the normal way here, since
409 * this might be an invalid command. Thus we send the
410 * first byte, and check for an early turn of data directon.
413 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
414 return fdc_err(fdc, "Enable FIFO failed\n");
416 /* If command is invalid, return */
418 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
419 != NE7_RQM && j-- > 0) {
420 if (i == (NE7_DIO | NE7_RQM)) {
428 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
430 return fdc_err(fdc, "Enable FIFO failed\n");
432 fdc->flags |= FDC_HAS_FIFO;
436 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
437 return fdc_err(fdc, "Re-enable FIFO failed\n");
442 fd_sense_drive_status(fdc_p fdc, int *st3p)
446 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
448 return fdc_err(fdc, "Sense Drive Status failed\n");
457 fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
461 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
464 "sense intr err reading stat reg 0\n");
471 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
473 * There doesn't seem to have been an interrupt.
478 if (fd_in(fdc, &cyl) < 0) {
479 return fdc_err(fdc, "can't get cyl num\n");
490 fd_read_status(fdc_p fdc, int fdsu)
494 for (i = 0; i < 7; i++) {
496 * XXX types are poorly chosen. Only bytes can by read
497 * from the hardware, but fdc->status[] wants u_ints and
498 * fd_in() gives ints.
502 ret = fd_in(fdc, &status);
503 fdc->status[i] = status;
509 fdc->flags |= FDC_STAT_VALID;
511 fdc->flags &= ~FDC_STAT_VALID;
516 /****************************************************************************/
517 /* autoconfiguration stuff */
518 /****************************************************************************/
521 fdc_alloc_resources(struct fdc_data *fdc)
527 ispnp = (fdc->flags & FDC_ISPNP) != 0;
528 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
529 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
530 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
533 * On standard ISA, we don't just use an 8 port range
534 * (e.g. 0x3f0-0x3f7) since that covers an IDE control
537 * Isn't PC hardware wonderful.
539 * The Y-E Data PCMCIA FDC doesn't have this problem, it
540 * uses the register with offset 6 for pseudo-DMA, and the
541 * one with offset 7 as control register.
543 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
544 &fdc->rid_ioport, 0ul, ~0ul,
545 ispcmcia ? 8 : (ispnp ? 1 : 6),
547 if (fdc->res_ioport == 0) {
548 device_printf(dev, "cannot reserve I/O port range\n");
551 fdc->portt = rman_get_bustag(fdc->res_ioport);
552 fdc->porth = rman_get_bushandle(fdc->res_ioport);
556 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
557 * and some at 0x3f0-0x3f5,0x3f7. We detect the former
558 * by checking the size and adjust the port address
561 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
565 * Register the control port range as rid 1 if it
566 * isn't there already. Most PnP BIOSen will have
567 * already done this but non-PnP configurations don't.
569 * And some (!!) report 0x3f2-0x3f5 and completely
570 * leave out the control register! It seems that some
571 * non-antique controller chips have a different
572 * method of programming the transfer speed which
573 * doesn't require the control register, but it's
574 * mighty bogus as the chip still responds to the
575 * address for the control register.
577 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
580 /* Find the control port, usually 0x3f7 */
581 ctlstart = rman_get_start(fdc->res_ioport) +
584 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
588 * Now (finally!) allocate the control port.
591 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
593 0ul, ~0ul, 1, RF_ACTIVE);
594 if (fdc->res_ctl == 0) {
596 "cannot reserve control I/O port range\n");
599 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
600 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
603 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
604 &fdc->rid_irq, 0ul, ~0ul, 1,
606 if (fdc->res_irq == 0) {
607 device_printf(dev, "cannot reserve interrupt line\n");
611 if ((fdc->flags & FDC_NODMA) == 0) {
612 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
613 &fdc->rid_drq, 0ul, ~0ul, 1,
615 if (fdc->res_drq == 0) {
616 device_printf(dev, "cannot reserve DMA request line\n");
619 fdc->dmachan = fdc->res_drq->r_start;
626 fdc_release_resources(struct fdc_data *fdc)
631 if (fdc->res_irq != 0) {
632 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
634 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
637 if (fdc->res_ctl != 0) {
638 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
640 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
643 if (fdc->res_ioport != 0) {
644 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
646 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
649 if (fdc->res_drq != 0) {
650 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
652 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
657 /****************************************************************************/
658 /* autoconfiguration stuff */
659 /****************************************************************************/
661 static struct isa_pnp_id fdc_ids[] = {
662 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
663 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
668 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
670 struct fdc_ivars *ivars = device_get_ivars(child);
673 case FDC_IVAR_FDUNIT:
674 *result = ivars->fdunit;
683 * fdc controller section.
686 fdc_probe(device_t dev)
689 struct fdc_data *fdc;
691 fdc = device_get_softc(dev);
692 bzero(fdc, sizeof *fdc);
694 fdc->fdctl_wr = fdctl_wr_isa;
697 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
701 fdc->flags |= FDC_ISPNP;
703 /* Attempt to allocate our resources for the duration of the probe */
704 error = fdc_alloc_resources(fdc);
708 /* First - lets reset the floppy controller */
711 fdout_wr(fdc, FDO_FRST);
713 /* see if it can handle a command */
714 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
715 NE7_SPEC_2(2, 0), 0)) {
720 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
721 ic_type = (u_char)ic_type;
724 device_set_desc(dev, "NEC 765 or clone");
725 fdc->fdct = FDC_NE765;
728 device_set_desc(dev, "Intel 82077 or clone");
729 fdc->fdct = FDC_I82077;
732 device_set_desc(dev, "NEC 72065B or clone");
733 fdc->fdct = FDC_NE72065;
736 device_set_desc(dev, "generic floppy controller");
737 fdc->fdct = FDC_UNKNOWN;
743 fdc_release_resources(fdc);
748 * Add a child device to the fdc controller. It will then be probed etc.
751 fdc_add_child(device_t dev, const char *name, int unit)
754 struct fdc_ivars *ivar;
757 ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
758 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
760 child = device_add_child(dev, name, unit);
763 device_set_ivars(child, ivar);
764 if (resource_int_value(name, unit, "disabled", &disabled) == 0
766 device_disable(child);
770 fdc_attach(device_t dev)
772 struct fdc_data *fdc;
775 fdc = device_get_softc(dev);
777 callout_init(&fdc->pseudointr_ch);
779 error = fdc_alloc_resources(fdc);
781 device_printf(dev, "cannot re-aquire resources\n");
784 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
786 &fdc->fdc_intr, NULL);
788 device_printf(dev, "cannot setup interrupt\n");
791 fdc->fdcu = device_get_unit(dev);
792 fdc->flags |= FDC_ATTACHED;
794 if ((fdc->flags & FDC_NODMA) == 0) {
795 /* Acquire the DMA channel forever, The driver will do the rest */
796 /* XXX should integrate with rman */
797 isa_dma_acquire(fdc->dmachan);
798 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
800 fdc->state = DEVIDLE;
802 /* reset controller, turn motor off, clear fdout mirror reg */
803 fdout_wr(fdc, ((fdc->fdout = 0)));
804 bioq_init(&fdc->bio_queue);
807 * Probe and attach any children. We should probably detect
808 * devices from the BIOS unless overridden.
810 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
812 i = resource_query_string(i, "at", device_get_nameunit(dev)))
813 fdc_add_child(dev, resource_query_name(i),
814 resource_query_unit(i));
816 return (bus_generic_attach(dev));
820 fdc_print_child(device_t me, device_t child)
824 retval += bus_print_child_header(me, child);
825 retval += printf(" on %s drive %d\n", device_get_nameunit(me),
826 fdc_get_fdunit(child));
831 static device_method_t fdc_methods[] = {
832 /* Device interface */
833 DEVMETHOD(device_probe, fdc_probe),
834 DEVMETHOD(device_attach, fdc_attach),
835 DEVMETHOD(device_detach, bus_generic_detach),
836 DEVMETHOD(device_shutdown, bus_generic_shutdown),
837 DEVMETHOD(device_suspend, bus_generic_suspend),
838 DEVMETHOD(device_resume, bus_generic_resume),
841 DEVMETHOD(bus_print_child, fdc_print_child),
842 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
843 /* Our children never use any other bus interface methods. */
848 static driver_t fdc_driver = {
851 sizeof(struct fdc_data)
854 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
856 /******************************************************************/
858 * devices attached to the controller section.
861 fd_probe(device_t dev)
866 struct fdc_data *fdc;
868 static int fd_fifo = 0;
870 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
871 fd = device_get_softc(dev);
872 fdc = device_get_softc(device_get_parent(dev));
874 bzero(fd, sizeof *fd);
878 fd->fdu = device_get_unit(dev);
881 /* look up what bios thinks we have */
884 if ((fdc->flags & FDC_ISPCMCIA))
886 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
887 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
889 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
892 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
899 fdt = RTCFDT_144M; /* XXX probably */
902 /* is there a unit? */
903 if (fdt == RTCFDT_NONE)
907 set_motor(fdc, fdsu, TURNON);
908 DELAY(1000000); /* 1 sec */
910 /* XXX This doesn't work before the first set_motor() */
911 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
912 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
913 && enable_fifo(fdc) == 0) {
914 device_printf(device_get_parent(dev),
915 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
919 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
920 && (st3 & NE7_ST3_T0)) {
921 /* if at track 0, first seek inwards */
922 /* seek some steps: */
923 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
924 DELAY(300000); /* ...wait a moment... */
925 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
928 /* If we're at track 0 first seek inwards. */
929 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
930 /* Seek some steps... */
931 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
932 /* ...wait a moment... */
934 /* make ctrlr happy: */
935 fd_sense_int(fdc, 0, 0);
939 for (i = 0; i < 2; i++) {
941 * we must recalibrate twice, just in case the
942 * heads have been beyond cylinder 76, since most
943 * FDCs still barf when attempting to recalibrate
947 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
948 /* a second being enough for full stroke seek*/
949 DELAY(i == 0 ? 1000000 : 300000);
951 /* anything responding? */
952 if (fd_sense_int(fdc, &st0, 0) == 0 &&
953 (st0 & NE7_ST0_EC) == 0)
954 break; /* already probed succesfully */
958 set_motor(fdc, fdsu, TURNOFF);
960 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
963 fd->track = FD_NO_TRACK;
967 callout_init(&fd->toffhandle);
968 callout_init(&fd->tohandle);
969 callout_init(&fd->motor);
973 device_set_desc(dev, "1200-KB 5.25\" drive");
976 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
977 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
981 device_set_desc(dev, "1440-KB 3.5\" drive");
986 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
990 device_set_desc(dev, "360-KB 5.25\" drive");
994 printf("720-KB 3.5\" drive");
1004 fd_attach(device_t dev)
1014 fd = device_get_softc(dev);
1016 dev_ops_add(&fd_ops, -1 << 6, fd->fdu << 6);
1017 make_dev(&fd_ops, (fd->fdu << 6),
1018 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu);
1021 /* Other make_dev() go here. */
1025 * Export the drive to the devstat interface.
1027 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1028 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1029 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1030 DEVSTAT_PRIORITY_FD);
1035 fd_detach(device_t dev)
1039 fd = device_get_softc(dev);
1040 callout_stop(&fd->toffhandle);
1041 callout_stop(&fd->motor);
1046 static device_method_t fd_methods[] = {
1047 /* Device interface */
1048 DEVMETHOD(device_probe, fd_probe),
1049 DEVMETHOD(device_attach, fd_attach),
1050 DEVMETHOD(device_detach, fd_detach),
1051 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1052 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1053 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1058 static driver_t fd_driver = {
1061 sizeof(struct fd_data)
1064 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1066 /****************************************************************************/
1067 /* motor control stuff */
1068 /* remember to not deselect the drive we're working on */
1069 /****************************************************************************/
1071 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1073 int fdout = fdc->fdout;
1074 int needspecify = 0;
1077 fdout &= ~FDO_FDSEL;
1078 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1080 fdout &= ~(FDO_MOEN0 << fdsu);
1083 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1084 /* gonna turn off the last drive, put FDC to bed */
1085 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1087 /* make sure controller is selected and specified */
1088 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1090 fdout |= (FDO_FRST|FDO_FDMAEN);
1093 fdout_wr(fdc, fdout);
1095 TRACE1("[0x%x->FDOUT]", fdout);
1100 * special case: since we have just woken up the FDC
1101 * from its sleep, we silently assume the command will
1102 * be accepted, and do not test for a timeout
1104 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1105 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1107 if (fdc->flags & FDC_HAS_FIFO)
1108 (void) enable_fifo(fdc);
1113 fd_turnoff(void *xfd)
1117 TRACE1("[fd%d: turnoff]", fd->fdu);
1121 * Don't turn off the motor yet if the drive is active.
1123 * If we got here, this could only mean we missed an interrupt.
1124 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1125 * after a controller reset. Just schedule a pseudo-interrupt
1126 * so the state machine gets re-entered.
1128 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1134 fd->flags &= ~FD_MOTOR;
1135 set_motor(fd->fdc, fd->fdsu, TURNOFF);
1140 fd_motor_on(void *xfd)
1145 fd->flags &= ~FD_MOTOR_WAIT;
1146 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1156 if(!(fd->flags & FD_MOTOR))
1158 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1159 set_motor(fd->fdc, fd->fdsu, TURNON);
1160 callout_reset(&fd->motor, hz, fd_motor_on, fd);
1165 fdc_reset(fdc_p fdc)
1167 /* Try a reset, keep motor on */
1168 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1169 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1171 /* enable FDC, but defer interrupts a moment */
1172 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1173 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1175 fdout_wr(fdc, fdc->fdout);
1176 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1178 /* XXX after a reset, silently believe the FDC will accept commands */
1179 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1180 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1182 if (fdc->flags & FDC_HAS_FIFO)
1183 (void) enable_fifo(fdc);
1186 /****************************************************************************/
1188 /****************************************************************************/
1190 * FDC IO functions, take care of the main status register, timeout
1191 * in case the desired status bits are never set.
1193 * These PIO loops initially start out with short delays between
1194 * each iteration in the expectation that the required condition
1195 * is usually met quickly, so it can be handled immediately. After
1196 * about 1 ms, stepping is increased to achieve a better timing
1197 * accuracy in the calls to DELAY().
1200 fd_in(struct fdc_data *fdc, int *ptr)
1204 for (j = 0, step = 1;
1205 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1209 return (fdc_err(fdc, "ready for output in input\n"));
1214 if (j >= FDSTS_TIMEOUT)
1215 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1218 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1221 #else /* !FDC_DEBUG */
1226 #endif /* FDC_DEBUG */
1230 out_fdc(struct fdc_data *fdc, int x)
1234 for (j = 0, step = 1;
1235 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1238 if (i == (NE7_DIO|NE7_RQM))
1239 return (fdc_err(fdc, "ready for input in output\n"));
1244 if (j >= FDSTS_TIMEOUT)
1245 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1247 /* Send the command and return */
1249 TRACE1("[0x%x->FDDATA]", x);
1253 /****************************************************************************/
1254 /* fdopen/fdclose */
1255 /****************************************************************************/
1257 Fdopen(struct dev_open_args *ap)
1259 cdev_t dev = ap->a_head.a_dev;
1260 fdu_t fdu = FDUNIT(minor(dev));
1261 int type = FDTYPE(minor(dev));
1266 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1269 if ((fdc == NULL) || (fd->type == NO_TYPE))
1277 * For each type of basic drive, make sure we are trying
1278 * to open a type it can do,
1280 if (type != fd->type) {
1294 type = FD_1480in5_25;
1297 type = FD_1440in5_25;
1302 type = FD_820in5_25;
1305 type = FD_800in5_25;
1308 type = FD_720in5_25;
1311 type = FD_640in5_25;
1314 type = FD_360in5_25;
1321 if ( type != FD_1720
1334 fd->ft = fd_types + type - 1;
1335 fd->flags |= FD_OPEN;
1337 * Clearing the DMA overrun counter at open time is a bit messy.
1338 * Since we're only managing one counter per controller, opening
1339 * the second drive could mess it up. Anyway, if the DMA overrun
1340 * condition is really persistent, it will eventually time out
1341 * still. OTOH, clearing it here will ensure we'll at least start
1342 * trying again after a previous (maybe even long ago) failure.
1343 * Also, this is merely a stop-gap measure only that should not
1344 * happen during normal operation, so we can tolerate it to be a
1345 * bit sloppy about this.
1347 fdc->dma_overruns = 0;
1353 fdclose(struct dev_close_args *ap)
1355 cdev_t dev = ap->a_head.a_dev;
1356 fdu_t fdu = FDUNIT(minor(dev));
1359 fd = devclass_get_softc(fd_devclass, fdu);
1360 fd->flags &= ~FD_OPEN;
1361 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1366 /****************************************************************************/
1368 /****************************************************************************/
1370 fdstrategy(struct dev_strategy_args *ap)
1372 cdev_t dev = ap->a_head.a_dev;
1373 struct bio *bio = ap->a_bio;
1374 struct buf *bp = bio->bio_buf;
1375 unsigned nblocks, blknum, cando;
1381 fdu = FDUNIT(minor(dev));
1382 fd = devclass_get_softc(fd_devclass, fdu);
1384 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1385 (u_long)major(dev), (u_long)minor(dev));
1387 if (fd->type == NO_TYPE) {
1388 bp->b_error = ENXIO;
1389 bp->b_flags |= B_ERROR;
1393 fdblk = 128 << (fd->ft->secsize);
1394 if (bp->b_cmd != BUF_CMD_FORMAT) {
1395 if (bio->bio_offset < 0) {
1397 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n",
1398 fdu, bio->bio_offset, bp->b_bcount);
1399 bp->b_error = EINVAL;
1400 bp->b_flags |= B_ERROR;
1403 if ((bp->b_bcount % fdblk) != 0) {
1404 bp->b_error = EINVAL;
1405 bp->b_flags |= B_ERROR;
1411 * Set up block calculations.
1413 if (bio->bio_offset > 20000000LL * fdblk) {
1415 * Reject unreasonably high block number, prevent the
1416 * multiplication below from overflowing.
1418 bp->b_error = EINVAL;
1419 bp->b_flags |= B_ERROR;
1422 blknum = (unsigned)(bio->bio_offset / fdblk);
1423 nblocks = fd->ft->size;
1425 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1426 if (blknum <= nblocks) {
1427 cando = (nblocks - blknum) * fdblk;
1428 bp->b_resid = bp->b_bcount - cando;
1430 goto bad; /* not actually bad but EOF */
1432 bp->b_error = EINVAL;
1433 bp->b_flags |= B_ERROR;
1438 bio->bio_driver_info = dev;
1439 bioqdisksort(&fdc->bio_queue, bio);
1440 callout_stop(&fd->toffhandle);
1442 /* Tell devstat we are starting on the transaction */
1443 devstat_start_transaction(&fd->device_stats);
1444 device_busy(fd->dev);
1455 /***************************************************************\
1457 * We have just queued something.. if the controller is not busy *
1458 * then simulate the case where it has just finished a command *
1459 * So that it (the interrupt routine) looks on the queue for more*
1460 * work to do and picks up what we just added. *
1461 * If the controller is already busy, we need do nothing, as it *
1462 * will pick up our work when the present work completes *
1463 \***************************************************************/
1465 fdstart(struct fdc_data *fdc)
1468 if(fdc->state == DEVIDLE)
1476 fd_iotimeout(void *xfdc)
1481 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1484 * Due to IBM's brain-dead design, the FDC has a faked ready
1485 * signal, hardwired to ready == true. Thus, any command
1486 * issued if there's no diskette in the drive will _never_
1487 * complete, and must be aborted by resetting the FDC.
1488 * Many thanks, Big Blue!
1489 * The FDC must not be reset directly, since that would
1490 * interfere with the state machine. Instead, pretend that
1491 * the command completed but was invalid. The state machine
1492 * will reset the FDC and retry once.
1495 fdc->status[0] = NE7_ST0_IC_IV;
1496 fdc->flags &= ~FDC_STAT_VALID;
1497 fdc->state = IOTIMEDOUT;
1502 /* just ensure it is running in a critical section */
1504 fd_pseudointr(void *xfdc)
1511 /***********************************************************************\
1513 * keep calling the state machine until it returns a 0 *
1514 * ALWAYS called at SPLBIO *
1515 \***********************************************************************/
1517 fdc_intr(void *xfdc)
1525 * magic pseudo-DMA initialization for YE FDC. Sets count and
1528 #define SET_BCDR(fdc,wr,cnt,port) \
1529 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1530 ((cnt)-1) & 0xff); \
1531 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1532 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1535 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1537 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
1539 u_char *cptr = (u_char *)addr;
1541 if (cmd == BUF_CMD_READ) {
1542 if (fdc->state != PIOREAD) {
1543 fdc->state = PIOREAD;
1546 SET_BCDR(fdc, 0, count, 0);
1547 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1548 FDC_YE_DATAPORT, cptr, count);
1550 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1551 FDC_YE_DATAPORT, cptr, count);
1552 SET_BCDR(fdc, 0, count, 0);
1557 /***********************************************************************\
1558 * The controller state machine. *
1559 * if it returns a non zero value, it should be called again immediatly *
1560 \***********************************************************************/
1564 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1565 unsigned blknum = 0, b_cylinder = 0;
1566 fdu_t fdu = fdc->fdu;
1570 struct fd_formb *finfo = NULL;
1576 bio = bioq_first(&fdc->bio_queue);
1578 bioq_remove(&fdc->bio_queue, bio);
1583 /***********************************************\
1584 * nothing left for this controller to do *
1585 * Force into the IDLE state, *
1586 \***********************************************/
1587 fdc->state = DEVIDLE;
1589 device_printf(fdc->fdc_dev,
1590 "unexpected valid fd pointer\n");
1594 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1598 dev = bio->bio_driver_info;
1600 fdu = FDUNIT(minor(dev));
1601 fd = devclass_get_softc(fd_devclass, fdu);
1602 fdblk = 128 << fd->ft->secsize;
1603 if (fdc->fd && (fd != fdc->fd))
1604 device_printf(fd->dev, "confused fd pointers\n");
1605 read = (bp->b_cmd == BUF_CMD_READ);
1606 format = (bp->b_cmd == BUF_CMD_FORMAT);
1608 finfo = (struct fd_formb *)bp->b_data;
1609 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1612 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1613 blknum = (unsigned)(bio->bio_offset / fdblk) +
1615 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1617 TRACE1("fd%d", fdu);
1618 TRACE1("[%s]", fdstates[fdc->state]);
1619 TRACE1("(0x%x)", fd->flags);
1620 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
1624 case FINDWORK: /* we have found new work */
1629 fdc->fdctl_wr(fdc, fd->ft->trans);
1630 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1631 /*******************************************************\
1632 * If the next drive has a motor startup pending, then *
1633 * it will start up in its own good time *
1634 \*******************************************************/
1635 if(fd->flags & FD_MOTOR_WAIT) {
1636 fdc->state = MOTORWAIT;
1637 return (0); /* come back later */
1639 /*******************************************************\
1640 * Maybe if it's not starting, it SHOULD be starting *
1641 \*******************************************************/
1642 if (!(fd->flags & FD_MOTOR))
1644 fdc->state = MOTORWAIT;
1648 else /* at least make sure we are selected */
1650 set_motor(fdc, fd->fdsu, TURNON);
1652 if (fdc->flags & FDC_NEEDS_RESET) {
1653 fdc->state = RESETCTLR;
1654 fdc->flags &= ~FDC_NEEDS_RESET;
1656 fdc->state = DOSEEK;
1659 if (b_cylinder == (unsigned)fd->track)
1661 fdc->state = SEEKCOMPLETE;
1664 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1665 fd->fdsu, b_cylinder * fd->ft->steptrac,
1669 * seek command not accepted, looks like
1670 * the FDC went off to the Saints...
1672 fdc->retry = 6; /* try a reset */
1673 return(retrier(fdc));
1675 fd->track = FD_NO_TRACK;
1676 fdc->state = SEEKWAIT;
1677 return(0); /* will return later */
1679 /* allow heads to settle */
1680 callout_reset(&fdc->pseudointr_ch, hz / 16,
1681 fd_pseudointr, fdc);
1682 fdc->state = SEEKCOMPLETE;
1683 return(0); /* will return later */
1684 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1685 /* Make sure seek really happened*/
1686 if(fd->track == FD_NO_TRACK) {
1687 int descyl = b_cylinder * fd->ft->steptrac;
1690 * This might be a "ready changed" interrupt,
1691 * which cannot really happen since the
1692 * RDY pin is hardwired to + 5 volts. This
1693 * generally indicates a "bouncing" intr
1694 * line, so do one of the following:
1696 * When running on an enhanced FDC that is
1697 * known to not go stuck after responding
1698 * with INVALID, fetch all interrupt states
1699 * until seeing either an INVALID or a
1700 * real interrupt condition.
1702 * When running on a dumb old NE765, give
1703 * up immediately. The controller will
1704 * provide up to four dummy RC interrupt
1705 * conditions right after reset (for the
1706 * corresponding four drives), so this is
1707 * our only chance to get notice that it
1708 * was not the FDC that caused the interrupt.
1710 if (fd_sense_int(fdc, &st0, &cyl)
1713 if(fdc->fdct == FDC_NE765
1714 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1715 return 0; /* hope for a real intr */
1716 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1721 * seek to cyl 0 requested; make sure we are
1724 if (fd_sense_drive_status(fdc, &st3))
1726 if ((st3 & NE7_ST3_T0) == 0) {
1728 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1729 fdu, st3, NE7_ST3BITS);
1736 return (retrier(fdc));
1740 if (cyl != descyl) {
1742 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1743 fdu, descyl, cyl, st0);
1746 return (retrier(fdc));
1750 fd->track = b_cylinder;
1751 if (!(fdc->flags & FDC_NODMA)) {
1752 isa_dmastart(isa_dmabp(bp),
1753 bp->b_data+fd->skip,
1754 format ? bp->b_bcount : fdblk, fdc->dmachan);
1756 sectrac = fd->ft->sectrac;
1757 sec = blknum % (sectrac * fd->ft->heads);
1758 head = sec / sectrac;
1759 sec = sec % sectrac + 1;
1760 fd->hddrv = ((head&1)<<2)+fdu;
1764 /* make sure the drive is writable */
1765 if(fd_sense_drive_status(fdc, &st3) != 0)
1767 /* stuck controller? */
1768 if (!(fdc->flags & FDC_NODMA))
1769 isa_dmadone(isa_dmabp(bp),
1770 bp->b_data + fd->skip,
1771 format ? bp->b_bcount : fdblk,
1773 fdc->retry = 6; /* reset the beast */
1774 return (retrier(fdc));
1776 if(st3 & NE7_ST3_WP)
1779 * XXX YES! this is ugly.
1780 * in order to force the current operation
1781 * to fail, we will have to fake an FDC
1782 * error - all error handling is done
1785 fdc->status[0] = NE7_ST0_IC_AT;
1786 fdc->status[1] = NE7_ST1_NW;
1788 fdc->status[3] = fd->track;
1789 fdc->status[4] = head;
1790 fdc->status[5] = sec;
1791 fdc->retry = 8; /* break out immediately */
1792 fdc->state = IOTIMEDOUT; /* not really... */
1798 if (fdc->flags & FDC_NODMA) {
1800 * This seems to be necessary for
1801 * whatever obscure reason; if we omit
1802 * it, we end up filling the sector ID
1803 * fields of the newly formatted track
1804 * entirely with garbage, causing
1805 * `wrong cylinder' errors all over
1806 * the place when trying to read them
1811 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1813 (void)fdcpio(fdc,bp->b_cmd,
1814 bp->b_data+fd->skip,
1819 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1820 finfo->fd_formb_secshift,
1821 finfo->fd_formb_nsecs,
1822 finfo->fd_formb_gaplen,
1823 finfo->fd_formb_fillbyte, 0)) {
1824 /* controller fell over */
1825 if (!(fdc->flags & FDC_NODMA))
1826 isa_dmadone(isa_dmabp(bp),
1827 bp->b_data + fd->skip,
1828 format ? bp->b_bcount : fdblk,
1831 return (retrier(fdc));
1834 if (fdc->flags & FDC_NODMA) {
1836 * this seems to be necessary even when
1839 SET_BCDR(fdc, 1, fdblk, 0);
1842 * perform the write pseudo-DMA before
1843 * the WRITE command is sent
1846 (void)fdcpio(fdc,bp->b_cmd,
1847 bp->b_data+fd->skip,
1851 (read ? NE7CMD_READ : NE7CMD_WRITE),
1852 head << 2 | fdu, /* head & unit */
1853 fd->track, /* track */
1855 sec, /* sector + 1 */
1856 fd->ft->secsize, /* sector size */
1857 sectrac, /* sectors/track */
1858 fd->ft->gap, /* gap size */
1859 fd->ft->datalen, /* data length */
1861 /* the beast is sleeping again */
1862 if (!(fdc->flags & FDC_NODMA))
1863 isa_dmadone(isa_dmabp(bp),
1864 bp->b_data + fd->skip,
1865 format ? bp->b_bcount : fdblk,
1868 return (retrier(fdc));
1871 if (fdc->flags & FDC_NODMA)
1873 * if this is a read, then simply await interrupt
1874 * before performing PIO
1876 if (read && !fdcpio(fdc,bp->b_cmd,
1877 bp->b_data+fd->skip,fdblk)) {
1878 callout_reset(&fd->tohandle, hz,
1880 return(0); /* will return later */
1884 * write (or format) operation will fall through and
1885 * await completion interrupt
1887 fdc->state = IOCOMPLETE;
1888 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
1889 return (0); /* will return later */
1892 * actually perform the PIO read. The IOCOMPLETE case
1893 * removes the timeout for us.
1895 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
1896 fdc->state = IOCOMPLETE;
1898 case IOCOMPLETE: /* IO DONE, post-analyze */
1899 callout_stop(&fd->tohandle);
1901 if (fd_read_status(fdc, fd->fdsu)) {
1902 if (!(fdc->flags & FDC_NODMA)) {
1903 isa_dmadone(isa_dmabp(bp),
1904 bp->b_data + fd->skip,
1905 format ? bp->b_bcount : fdblk,
1909 fdc->retry = 6; /* force a reset */
1910 return (retrier(fdc));
1913 fdc->state = IOTIMEDOUT;
1918 if (!(fdc->flags & FDC_NODMA)) {
1919 isa_dmadone(isa_dmabp(bp),
1920 bp->b_data + fd->skip,
1921 format ? bp->b_bcount : fdblk, fdc->dmachan);
1923 if (fdc->status[0] & NE7_ST0_IC) {
1924 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1925 && fdc->status[1] & NE7_ST1_OR) {
1927 * DMA overrun. Someone hogged the bus and
1928 * didn't release it in time for the next
1931 * We normally restart this without bumping
1932 * the retry counter. However, in case
1933 * something is seriously messed up (like
1934 * broken hardware), we rather limit the
1935 * number of retries so the IO operation
1936 * doesn't block indefinately.
1938 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
1939 fdc->state = SEEKCOMPLETE;
1941 } /* else fall through */
1943 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
1945 fdc->retry = 6; /* force a reset */
1946 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1947 && fdc->status[2] & NE7_ST2_WC
1949 fdc->retry = 3; /* force recalibrate */
1950 return (retrier(fdc));
1953 /* Operation successful, retry DMA overruns again next time. */
1954 fdc->dma_overruns = 0;
1956 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
1957 /* set up next transfer */
1958 fdc->state = DOSEEK;
1963 device_unbusy(fd->dev);
1964 devstat_end_transaction_buf(&fd->device_stats, bp);
1968 fdc->state = FINDWORK;
1974 fdc->state = RESETCOMPLETE;
1978 * Discard all the results from the reset so that they
1979 * can't cause an unexpected interrupt later.
1981 for (i = 0; i < 4; i++)
1982 (void)fd_sense_int(fdc, &st0, &cyl);
1983 fdc->state = STARTRECAL;
1986 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
1989 return (retrier(fdc));
1991 fdc->state = RECALWAIT;
1992 return (0); /* will return later */
1994 /* allow heads to settle */
1995 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
1996 fdc->state = RECALCOMPLETE;
1997 return (0); /* will return later */
2001 * See SEEKCOMPLETE for a comment on this:
2003 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2005 if(fdc->fdct == FDC_NE765
2006 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2007 return 0; /* hope for a real intr */
2008 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2009 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2013 * a recalibrate from beyond cylinder 77
2014 * will "fail" due to the FDC limitations;
2015 * since people used to complain much about
2016 * the failure message, try not logging
2017 * this one if it seems to be the first
2020 printf("fd%d: recal failed ST0 %b cyl %d\n",
2021 fdu, st0, NE7_ST0BITS, cyl);
2022 if(fdc->retry < 3) fdc->retry = 3;
2023 return (retrier(fdc));
2026 /* Seek (probably) necessary */
2027 fdc->state = DOSEEK;
2028 return (1); /* will return immediatly */
2030 if(fd->flags & FD_MOTOR_WAIT)
2032 return (0); /* time's not up yet */
2034 if (fdc->flags & FDC_NEEDS_RESET) {
2035 fdc->state = RESETCTLR;
2036 fdc->flags &= ~FDC_NEEDS_RESET;
2039 * If all motors were off, then the controller was
2040 * reset, so it has lost track of the current
2041 * cylinder. Recalibrate to handle this case.
2042 * But first, discard the results of the reset.
2044 fdc->state = RESETCOMPLETE;
2046 return (1); /* will return immediatly */
2048 device_printf(fdc->fdc_dev, "unexpected FD int->");
2049 if (fd_read_status(fdc, fd->fdsu) == 0)
2050 printf("FDC status :%x %x %x %x %x %x %x ",
2059 printf("No status available ");
2060 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2062 printf("[controller is dead now]\n");
2065 printf("ST0 = %x, PCN = %x\n", st0, cyl);
2068 /*XXX confusing: some branches return immediately, others end up here*/
2069 return (1); /* Come back immediatly to new state */
2073 retrier(struct fdc_data *fdc)
2083 dev = bio->bio_driver_info;
2085 /* XXX shouldn't this be cached somewhere? */
2086 fdu = FDUNIT(minor(dev));
2087 fd = devclass_get_softc(fd_devclass, fdu);
2088 if (fd->options & FDOPT_NORETRY)
2091 switch (fdc->retry) {
2092 case 0: case 1: case 2:
2093 fdc->state = SEEKCOMPLETE;
2095 case 3: case 4: case 5:
2096 fdc->state = STARTRECAL;
2099 fdc->state = RESETCTLR;
2106 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2110 * note: use the correct device for more
2111 * verbose error reporting.
2115 subdev = make_sub_dev(dev,
2116 (FDUNIT(minor(dev))<<3)|RAW_PART);
2117 diskerr(bio, subdev,
2118 "hard error", LOG_PRINTF,
2119 fdc->fd->skip, NULL);
2122 if (fdc->flags & FDC_STAT_VALID)
2124 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2125 fdc->status[0], NE7_ST0BITS,
2126 fdc->status[1], NE7_ST1BITS,
2127 fdc->status[2], NE7_ST2BITS,
2128 fdc->status[3], fdc->status[4],
2131 printf(" (No status)\n");
2134 bp->b_flags |= B_ERROR;
2136 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2139 device_unbusy(fd->dev);
2140 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2142 fdc->state = FINDWORK;
2143 fdc->flags |= FDC_NEEDS_RESET;
2153 fdformat_wakeup(struct bio *bio)
2155 bio->bio_buf->b_cmd = BUF_CMD_DONE;
2160 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred)
2168 fdu = FDUNIT(minor(dev));
2169 fd = devclass_get_softc(fd_devclass, fdu);
2170 fdblk = 128 << fd->ft->secsize;
2172 /* set up a buffer header for fdstrategy() */
2174 bp->b_cmd = BUF_CMD_FORMAT;
2177 * calculate a fake blkno, so fdstrategy() would initiate a
2178 * seek to the requested cylinder
2180 bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
2181 (fd->ft->sectrac * fd->ft->heads)
2182 + finfo->head * fd->ft->sectrac) * fdblk;
2183 bp->b_bio1.bio_driver_info = dev;
2184 bp->b_bio1.bio_done = fdformat_wakeup;
2186 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2187 bp->b_data = (caddr_t)finfo;
2189 /* now do the format */
2190 dev_dstrategy(dev, &bp->b_bio1);
2192 /* ...and wait for it to complete */
2194 while (bp->b_cmd != BUF_CMD_DONE) {
2195 rv = tsleep(&bp->b_bio1, 0, "fdform", 20 * hz);
2196 if (rv == EWOULDBLOCK)
2201 if (rv == EWOULDBLOCK) {
2204 device_unbusy(fd->dev);
2205 biodone(&bp->b_bio1);
2207 if (bp->b_flags & B_ERROR)
2210 * allow the process to be swapped
2217 * TODO: don't allocate buffer on stack.
2221 fdioctl(struct dev_ioctl_args *ap)
2223 cdev_t dev = ap->a_head.a_dev;
2224 fdu_t fdu = FDUNIT(minor(dev));
2225 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2228 struct fd_type *fdt;
2229 struct disklabel *dl;
2230 struct fdc_status *fsp;
2231 char buffer[DEV_BSIZE];
2234 fdblk = 128 << fd->ft->secsize;
2236 switch (ap->a_cmd) {
2238 bzero(buffer, sizeof (buffer));
2239 dl = (struct disklabel *)buffer;
2240 dl->d_secsize = fdblk;
2242 dl->d_secpercyl = fdt->size / fdt->tracks;
2243 dl->d_type = DTYPE_FLOPPY;
2245 if (readdisklabel(dev, dl)
2251 *(struct disklabel *)ap->a_data = *dl;
2255 if ((ap->a_fflag & FWRITE) == 0)
2260 if ((ap->a_fflag & FWRITE) == 0)
2265 if ((ap->a_fflag & FWRITE) == 0) {
2270 dl = (struct disklabel *)ap->a_data;
2272 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2276 error = writedisklabel(dev, (struct disklabel *)buffer);
2279 if ((ap->a_fflag & FWRITE) == 0)
2280 error = EBADF; /* must be opened for writing */
2281 else if (((struct fd_formb *)ap->a_data)->format_version !=
2283 error = EINVAL; /* wrong version of formatting prog */
2285 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred);
2288 case FD_GTYPE: /* get drive type */
2289 *(struct fd_type *)ap->a_data = *fd->ft;
2292 case FD_STYPE: /* set drive type */
2293 /* this is considered harmful; only allow for superuser */
2294 if (suser_cred(ap->a_cred, 0) != 0)
2296 *fd->ft = *(struct fd_type *)ap->a_data;
2299 case FD_GOPTS: /* get drive options */
2300 *(int *)ap->a_data = fd->options;
2303 case FD_SOPTS: /* set drive options */
2304 fd->options = *(int *)ap->a_data;
2308 fsp = (struct fdc_status *)ap->a_data;
2309 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2311 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2322 * Hello emacs, these are the
2325 * c-continued-statement-offset: 8
2326 * c-continued-brace-offset: 0
2327 * c-brace-offset: -8
2328 * c-brace-imaginary-offset: 0
2329 * c-argdecl-indent: 8
2330 * c-label-offset: -8
2331 * c++-hanging-braces: 1
2332 * c++-access-specifier-offset: -8
2333 * c++-empty-arglist-indent: 8
2334 * c++-friend-offset: 0