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 1.29 2006/04/30 17:22:16 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 /* configuration flags */
96 #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
97 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
99 /* internally used only, not really from CMOS: */
100 #define RTCFDT_144M_PRETENDED 0x1000
102 /* error returns for fd_cmd() */
104 #define FD_NOT_VALID -2
105 #define FDC_ERRMAX 100 /* do not log more */
107 * Stop retrying after this many DMA overruns. Since each retry takes
108 * one revolution, with 300 rpm., 25 retries take approximately 10
109 * seconds which the read attempt will block in case the DMA overrun
112 #define FDC_DMAOV_MAX 25
115 * Timeout value for the PIO loops to wait until the FDC main status
116 * register matches our expectations (request for master, direction
117 * bit). This is supposed to be a number of microseconds, although
118 * timing might actually not be very accurate.
120 * Timeouts of 100 msec are believed to be required for some broken
123 #define FDSTS_TIMEOUT 100000
126 #define NUMDENS (NUMTYPES - 7)
128 /* These defines (-1) must match index for fd_types */
129 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
130 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */
142 #define FD_1480in5_25 11
143 #define FD_1440in5_25 12
144 #define FD_820in5_25 13
145 #define FD_800in5_25 14
146 #define FD_720in5_25 15
147 #define FD_360in5_25 16
148 #define FD_640in5_25 17
151 static struct fd_type fd_types[NUMTYPES] =
153 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
154 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
155 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
156 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
157 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
158 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
159 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
160 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
161 { 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
162 { 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
164 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
165 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
166 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
167 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
168 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
169 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
170 { 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
173 #define DRVS_PER_CTLR 2 /* 2 floppies */
175 /***********************************************************************\
176 * Per controller structure. *
177 \***********************************************************************/
178 devclass_t fdc_devclass;
180 /***********************************************************************\
181 * Per drive structure. *
182 * N per controller (DRVS_PER_CTLR) *
183 \***********************************************************************/
185 struct fdc_data *fdc; /* pointer to controller structure */
186 int fdsu; /* this units number on this controller */
187 int type; /* Drive type (FD_1440...) */
188 struct fd_type *ft; /* pointer to the type descriptor */
190 #define FD_OPEN 0x01 /* it's open */
191 #define FD_ACTIVE 0x02 /* it's active */
192 #define FD_MOTOR 0x04 /* motor should be on */
193 #define FD_MOTOR_WAIT 0x08 /* motor coming up */
196 #define FD_NO_TRACK -2
197 int track; /* where we think the head is */
198 int options; /* user configurable options, see ioctl_fd.h */
199 struct callout toffhandle;
200 struct callout tohandle;
201 struct callout motor;
202 struct devstat device_stats;
210 static devclass_t fd_devclass;
212 /***********************************************************************\
213 * Throughout this file the following conventions will be used: *
214 * fd is a pointer to the fd_data struct for the drive in question *
215 * fdc is a pointer to the fdc_data struct for the controller *
216 * fdu is the floppy drive unit number *
217 * fdcu is the floppy controller unit number *
218 * fdsu is the floppy drive unit number on that controller. (sub-unit) *
219 \***********************************************************************/
221 /* internal functions */
222 static void fdc_intr(void *);
223 static void set_motor(struct fdc_data *, int, int);
226 static timeout_t fd_turnoff;
227 static timeout_t fd_motor_on;
228 static void fd_turnon(struct fd_data *);
229 static void fdc_reset(fdc_p);
230 static int fd_in(struct fdc_data *, int *);
231 static int out_fdc(struct fdc_data *, int);
232 static void fdstart(struct fdc_data *);
233 static timeout_t fd_iotimeout;
234 static timeout_t fd_pseudointr;
235 static int fdstate(struct fdc_data *);
236 static int retrier(struct fdc_data *);
237 static int fdformat(dev_t, struct fd_formb *, struct thread *);
239 static int enable_fifo(fdc_p fdc);
241 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
247 #define SEEKCOMPLETE 3
249 #define RECALCOMPLETE 5
255 #define IOTIMEDOUT 11
256 #define RESETCOMPLETE 12
260 static char const * const fdstates[] =
278 /* CAUTION: fd_debug causes huge amounts of logging output */
279 static int volatile fd_debug = 0;
280 #define TRACE0(arg) if(fd_debug) printf(arg)
281 #define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2)
282 #else /* FDC_DEBUG */
284 #define TRACE1(arg1, arg2)
285 #endif /* FDC_DEBUG */
288 fdout_wr(fdc_p fdc, u_int8_t v)
290 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
296 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
300 fddata_wr(fdc_p fdc, u_int8_t v)
302 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
308 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
312 fdctl_wr_isa(fdc_p fdc, u_int8_t v)
314 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
322 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
327 static d_open_t Fdopen; /* NOTE, not fdopen */
328 static d_close_t fdclose;
329 static d_ioctl_t fdioctl;
330 static d_strategy_t fdstrategy;
332 static struct cdevsw fd_cdevsw = {
334 /* maj */ FD_CDEV_MAJOR,
342 /* write */ physwrite,
346 /* strategy */ fdstrategy,
352 fdc_err(struct fdc_data *fdc, const char *s)
356 if (fdc->fdc_errs < FDC_ERRMAX)
357 device_printf(fdc->fdc_dev, "%s", s);
358 else if (fdc->fdc_errs == FDC_ERRMAX)
359 device_printf(fdc->fdc_dev, "too many errors, not "
360 "logging any more\n");
367 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
369 * # of output bytes, output bytes as ints ...,
370 * # of input bytes, input bytes as ints ...
373 fd_cmd(struct fdc_data *fdc, int n_out, ...)
380 __va_start(ap, n_out);
381 cmd = (u_char)(__va_arg(ap, int));
383 __va_start(ap, n_out);
384 for (n = 0; n < n_out; n++)
386 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
389 snprintf(msg, sizeof(msg),
390 "cmd %x failed at out byte %d of %d\n",
392 return fdc_err(fdc, msg);
395 n_in = __va_arg(ap, int);
396 for (n = 0; n < n_in; n++)
398 int *ptr = __va_arg(ap, int *);
399 if (fd_in(fdc, ptr) < 0)
402 snprintf(msg, sizeof(msg),
403 "cmd %02x failed at in byte %d of %d\n",
405 return fdc_err(fdc, msg);
413 enable_fifo(fdc_p fdc)
417 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
421 * Cannot use fd_cmd the normal way here, since
422 * this might be an invalid command. Thus we send the
423 * first byte, and check for an early turn of data directon.
426 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
427 return fdc_err(fdc, "Enable FIFO failed\n");
429 /* If command is invalid, return */
431 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
432 != NE7_RQM && j-- > 0) {
433 if (i == (NE7_DIO | NE7_RQM)) {
441 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
443 return fdc_err(fdc, "Enable FIFO failed\n");
445 fdc->flags |= FDC_HAS_FIFO;
449 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
450 return fdc_err(fdc, "Re-enable FIFO failed\n");
455 fd_sense_drive_status(fdc_p fdc, int *st3p)
459 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
461 return fdc_err(fdc, "Sense Drive Status failed\n");
470 fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
474 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
477 "sense intr err reading stat reg 0\n");
484 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
486 * There doesn't seem to have been an interrupt.
491 if (fd_in(fdc, &cyl) < 0) {
492 return fdc_err(fdc, "can't get cyl num\n");
503 fd_read_status(fdc_p fdc, int fdsu)
507 for (i = 0; i < 7; i++) {
509 * XXX types are poorly chosen. Only bytes can by read
510 * from the hardware, but fdc->status[] wants u_ints and
511 * fd_in() gives ints.
515 ret = fd_in(fdc, &status);
516 fdc->status[i] = status;
522 fdc->flags |= FDC_STAT_VALID;
524 fdc->flags &= ~FDC_STAT_VALID;
529 /****************************************************************************/
530 /* autoconfiguration stuff */
531 /****************************************************************************/
534 fdc_alloc_resources(struct fdc_data *fdc)
540 ispnp = (fdc->flags & FDC_ISPNP) != 0;
541 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
542 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
543 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
546 * On standard ISA, we don't just use an 8 port range
547 * (e.g. 0x3f0-0x3f7) since that covers an IDE control
550 * Isn't PC hardware wonderful.
552 * The Y-E Data PCMCIA FDC doesn't have this problem, it
553 * uses the register with offset 6 for pseudo-DMA, and the
554 * one with offset 7 as control register.
556 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
557 &fdc->rid_ioport, 0ul, ~0ul,
558 ispcmcia ? 8 : (ispnp ? 1 : 6),
560 if (fdc->res_ioport == 0) {
561 device_printf(dev, "cannot reserve I/O port range\n");
564 fdc->portt = rman_get_bustag(fdc->res_ioport);
565 fdc->porth = rman_get_bushandle(fdc->res_ioport);
569 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
570 * and some at 0x3f0-0x3f5,0x3f7. We detect the former
571 * by checking the size and adjust the port address
574 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
578 * Register the control port range as rid 1 if it
579 * isn't there already. Most PnP BIOSen will have
580 * already done this but non-PnP configurations don't.
582 * And some (!!) report 0x3f2-0x3f5 and completely
583 * leave out the control register! It seems that some
584 * non-antique controller chips have a different
585 * method of programming the transfer speed which
586 * doesn't require the control register, but it's
587 * mighty bogus as the chip still responds to the
588 * address for the control register.
590 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
593 /* Find the control port, usually 0x3f7 */
594 ctlstart = rman_get_start(fdc->res_ioport) +
597 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
601 * Now (finally!) allocate the control port.
604 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
606 0ul, ~0ul, 1, RF_ACTIVE);
607 if (fdc->res_ctl == 0) {
609 "cannot reserve control I/O port range\n");
612 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
613 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
616 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
617 &fdc->rid_irq, 0ul, ~0ul, 1,
619 if (fdc->res_irq == 0) {
620 device_printf(dev, "cannot reserve interrupt line\n");
624 if ((fdc->flags & FDC_NODMA) == 0) {
625 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
626 &fdc->rid_drq, 0ul, ~0ul, 1,
628 if (fdc->res_drq == 0) {
629 device_printf(dev, "cannot reserve DMA request line\n");
632 fdc->dmachan = fdc->res_drq->r_start;
639 fdc_release_resources(struct fdc_data *fdc)
644 if (fdc->res_irq != 0) {
645 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
647 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
650 if (fdc->res_ctl != 0) {
651 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
653 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
656 if (fdc->res_ioport != 0) {
657 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
659 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
662 if (fdc->res_drq != 0) {
663 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
665 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
670 /****************************************************************************/
671 /* autoconfiguration stuff */
672 /****************************************************************************/
674 static struct isa_pnp_id fdc_ids[] = {
675 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
676 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
681 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
683 struct fdc_ivars *ivars = device_get_ivars(child);
686 case FDC_IVAR_FDUNIT:
687 *result = ivars->fdunit;
696 * fdc controller section.
699 fdc_probe(device_t dev)
702 struct fdc_data *fdc;
704 fdc = device_get_softc(dev);
705 bzero(fdc, sizeof *fdc);
707 fdc->fdctl_wr = fdctl_wr_isa;
710 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
714 fdc->flags |= FDC_ISPNP;
716 /* Attempt to allocate our resources for the duration of the probe */
717 error = fdc_alloc_resources(fdc);
721 /* First - lets reset the floppy controller */
724 fdout_wr(fdc, FDO_FRST);
726 /* see if it can handle a command */
727 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
728 NE7_SPEC_2(2, 0), 0)) {
733 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
734 ic_type = (u_char)ic_type;
737 device_set_desc(dev, "NEC 765 or clone");
738 fdc->fdct = FDC_NE765;
741 device_set_desc(dev, "Intel 82077 or clone");
742 fdc->fdct = FDC_I82077;
745 device_set_desc(dev, "NEC 72065B or clone");
746 fdc->fdct = FDC_NE72065;
749 device_set_desc(dev, "generic floppy controller");
750 fdc->fdct = FDC_UNKNOWN;
756 fdc_release_resources(fdc);
761 * Add a child device to the fdc controller. It will then be probed etc.
764 fdc_add_child(device_t dev, const char *name, int unit)
767 struct fdc_ivars *ivar;
770 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
771 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
773 child = device_add_child(dev, name, unit);
776 device_set_ivars(child, ivar);
777 if (resource_int_value(name, unit, "disabled", &disabled) == 0
779 device_disable(child);
783 fdc_attach(device_t dev)
785 struct fdc_data *fdc;
788 fdc = device_get_softc(dev);
790 callout_init(&fdc->pseudointr_ch);
792 error = fdc_alloc_resources(fdc);
794 device_printf(dev, "cannot re-aquire resources\n");
797 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
799 &fdc->fdc_intr, NULL);
801 device_printf(dev, "cannot setup interrupt\n");
804 fdc->fdcu = device_get_unit(dev);
805 fdc->flags |= FDC_ATTACHED;
807 if ((fdc->flags & FDC_NODMA) == 0) {
808 /* Acquire the DMA channel forever, The driver will do the rest */
809 /* XXX should integrate with rman */
810 isa_dma_acquire(fdc->dmachan);
811 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
813 fdc->state = DEVIDLE;
815 /* reset controller, turn motor off, clear fdout mirror reg */
816 fdout_wr(fdc, ((fdc->fdout = 0)));
817 bioq_init(&fdc->bio_queue);
820 * Probe and attach any children. We should probably detect
821 * devices from the BIOS unless overridden.
823 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
825 i = resource_query_string(i, "at", device_get_nameunit(dev)))
826 fdc_add_child(dev, resource_query_name(i),
827 resource_query_unit(i));
829 return (bus_generic_attach(dev));
833 fdc_print_child(device_t me, device_t child)
837 retval += bus_print_child_header(me, child);
838 retval += printf(" on %s drive %d\n", device_get_nameunit(me),
839 fdc_get_fdunit(child));
844 static device_method_t fdc_methods[] = {
845 /* Device interface */
846 DEVMETHOD(device_probe, fdc_probe),
847 DEVMETHOD(device_attach, fdc_attach),
848 DEVMETHOD(device_detach, bus_generic_detach),
849 DEVMETHOD(device_shutdown, bus_generic_shutdown),
850 DEVMETHOD(device_suspend, bus_generic_suspend),
851 DEVMETHOD(device_resume, bus_generic_resume),
854 DEVMETHOD(bus_print_child, fdc_print_child),
855 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
856 /* Our children never use any other bus interface methods. */
861 static driver_t fdc_driver = {
864 sizeof(struct fdc_data)
867 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
869 /******************************************************************/
871 * devices attached to the controller section.
874 fd_probe(device_t dev)
879 struct fdc_data *fdc;
881 static int fd_fifo = 0;
883 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
884 fd = device_get_softc(dev);
885 fdc = device_get_softc(device_get_parent(dev));
887 bzero(fd, sizeof *fd);
891 fd->fdu = device_get_unit(dev);
894 /* look up what bios thinks we have */
897 if ((fdc->flags & FDC_ISPCMCIA))
899 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
900 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
902 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
905 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
912 fdt = RTCFDT_144M; /* XXX probably */
915 /* is there a unit? */
916 if (fdt == RTCFDT_NONE)
920 set_motor(fdc, fdsu, TURNON);
921 DELAY(1000000); /* 1 sec */
923 /* XXX This doesn't work before the first set_motor() */
924 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
925 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
926 && enable_fifo(fdc) == 0) {
927 device_printf(device_get_parent(dev),
928 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
932 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
933 && (st3 & NE7_ST3_T0)) {
934 /* if at track 0, first seek inwards */
935 /* seek some steps: */
936 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
937 DELAY(300000); /* ...wait a moment... */
938 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
941 /* If we're at track 0 first seek inwards. */
942 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
943 /* Seek some steps... */
944 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
945 /* ...wait a moment... */
947 /* make ctrlr happy: */
948 fd_sense_int(fdc, 0, 0);
952 for (i = 0; i < 2; i++) {
954 * we must recalibrate twice, just in case the
955 * heads have been beyond cylinder 76, since most
956 * FDCs still barf when attempting to recalibrate
960 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
961 /* a second being enough for full stroke seek*/
962 DELAY(i == 0 ? 1000000 : 300000);
964 /* anything responding? */
965 if (fd_sense_int(fdc, &st0, 0) == 0 &&
966 (st0 & NE7_ST0_EC) == 0)
967 break; /* already probed succesfully */
971 set_motor(fdc, fdsu, TURNOFF);
973 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
976 fd->track = FD_NO_TRACK;
980 callout_init(&fd->toffhandle);
981 callout_init(&fd->tohandle);
982 callout_init(&fd->motor);
986 device_set_desc(dev, "1200-KB 5.25\" drive");
989 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
990 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
994 device_set_desc(dev, "1440-KB 3.5\" drive");
999 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
1003 device_set_desc(dev, "360-KB 5.25\" drive");
1007 printf("720-KB 3.5\" drive");
1017 fd_attach(device_t dev)
1027 fd = device_get_softc(dev);
1029 cdevsw_add(&fd_cdevsw, -1 << 6, fd->fdu << 6);
1030 make_dev(&fd_cdevsw, (fd->fdu << 6),
1031 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu);
1034 /* Other make_dev() go here. */
1038 * Export the drive to the devstat interface.
1040 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1041 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1042 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1043 DEVSTAT_PRIORITY_FD);
1048 fd_detach(device_t dev)
1052 fd = device_get_softc(dev);
1053 callout_stop(&fd->toffhandle);
1054 callout_stop(&fd->motor);
1059 static device_method_t fd_methods[] = {
1060 /* Device interface */
1061 DEVMETHOD(device_probe, fd_probe),
1062 DEVMETHOD(device_attach, fd_attach),
1063 DEVMETHOD(device_detach, fd_detach),
1064 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1065 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1066 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1071 static driver_t fd_driver = {
1074 sizeof(struct fd_data)
1077 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1079 /****************************************************************************/
1080 /* motor control stuff */
1081 /* remember to not deselect the drive we're working on */
1082 /****************************************************************************/
1084 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1086 int fdout = fdc->fdout;
1087 int needspecify = 0;
1090 fdout &= ~FDO_FDSEL;
1091 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1093 fdout &= ~(FDO_MOEN0 << fdsu);
1096 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1097 /* gonna turn off the last drive, put FDC to bed */
1098 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1100 /* make sure controller is selected and specified */
1101 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1103 fdout |= (FDO_FRST|FDO_FDMAEN);
1106 fdout_wr(fdc, fdout);
1108 TRACE1("[0x%x->FDOUT]", fdout);
1113 * special case: since we have just woken up the FDC
1114 * from its sleep, we silently assume the command will
1115 * be accepted, and do not test for a timeout
1117 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1118 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1120 if (fdc->flags & FDC_HAS_FIFO)
1121 (void) enable_fifo(fdc);
1126 fd_turnoff(void *xfd)
1130 TRACE1("[fd%d: turnoff]", fd->fdu);
1134 * Don't turn off the motor yet if the drive is active.
1136 * If we got here, this could only mean we missed an interrupt.
1137 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1138 * after a controller reset. Just schedule a pseudo-interrupt
1139 * so the state machine gets re-entered.
1141 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1147 fd->flags &= ~FD_MOTOR;
1148 set_motor(fd->fdc, fd->fdsu, TURNOFF);
1153 fd_motor_on(void *xfd)
1158 fd->flags &= ~FD_MOTOR_WAIT;
1159 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1169 if(!(fd->flags & FD_MOTOR))
1171 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1172 set_motor(fd->fdc, fd->fdsu, TURNON);
1173 callout_reset(&fd->motor, hz, fd_motor_on, fd);
1178 fdc_reset(fdc_p fdc)
1180 /* Try a reset, keep motor on */
1181 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1182 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1184 /* enable FDC, but defer interrupts a moment */
1185 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1186 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1188 fdout_wr(fdc, fdc->fdout);
1189 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1191 /* XXX after a reset, silently believe the FDC will accept commands */
1192 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1193 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1195 if (fdc->flags & FDC_HAS_FIFO)
1196 (void) enable_fifo(fdc);
1199 /****************************************************************************/
1201 /****************************************************************************/
1203 * FDC IO functions, take care of the main status register, timeout
1204 * in case the desired status bits are never set.
1206 * These PIO loops initially start out with short delays between
1207 * each iteration in the expectation that the required condition
1208 * is usually met quickly, so it can be handled immediately. After
1209 * about 1 ms, stepping is increased to achieve a better timing
1210 * accuracy in the calls to DELAY().
1213 fd_in(struct fdc_data *fdc, int *ptr)
1217 for (j = 0, step = 1;
1218 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1222 return (fdc_err(fdc, "ready for output in input\n"));
1227 if (j >= FDSTS_TIMEOUT)
1228 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1231 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1234 #else /* !FDC_DEBUG */
1239 #endif /* FDC_DEBUG */
1243 out_fdc(struct fdc_data *fdc, int x)
1247 for (j = 0, step = 1;
1248 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1251 if (i == (NE7_DIO|NE7_RQM))
1252 return (fdc_err(fdc, "ready for input in output\n"));
1257 if (j >= FDSTS_TIMEOUT)
1258 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1260 /* Send the command and return */
1262 TRACE1("[0x%x->FDDATA]", x);
1266 /****************************************************************************/
1267 /* fdopen/fdclose */
1268 /****************************************************************************/
1270 Fdopen(dev_t dev, int flags, int mode, struct thread *td)
1272 fdu_t fdu = FDUNIT(minor(dev));
1273 int type = FDTYPE(minor(dev));
1278 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1281 if ((fdc == NULL) || (fd->type == NO_TYPE))
1289 * For each type of basic drive, make sure we are trying
1290 * to open a type it can do,
1292 if (type != fd->type) {
1306 type = FD_1480in5_25;
1309 type = FD_1440in5_25;
1314 type = FD_820in5_25;
1317 type = FD_800in5_25;
1320 type = FD_720in5_25;
1323 type = FD_640in5_25;
1326 type = FD_360in5_25;
1333 if ( type != FD_1720
1346 fd->ft = fd_types + type - 1;
1347 fd->flags |= FD_OPEN;
1349 * Clearing the DMA overrun counter at open time is a bit messy.
1350 * Since we're only managing one counter per controller, opening
1351 * the second drive could mess it up. Anyway, if the DMA overrun
1352 * condition is really persistent, it will eventually time out
1353 * still. OTOH, clearing it here will ensure we'll at least start
1354 * trying again after a previous (maybe even long ago) failure.
1355 * Also, this is merely a stop-gap measure only that should not
1356 * happen during normal operation, so we can tolerate it to be a
1357 * bit sloppy about this.
1359 fdc->dma_overruns = 0;
1365 fdclose(dev_t dev, int flags, int mode, struct thread *td)
1367 fdu_t fdu = FDUNIT(minor(dev));
1370 fd = devclass_get_softc(fd_devclass, fdu);
1371 fd->flags &= ~FD_OPEN;
1372 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1377 /****************************************************************************/
1379 /****************************************************************************/
1381 fdstrategy(dev_t dev, struct bio *bio)
1383 struct buf *bp = bio->bio_buf;
1384 unsigned nblocks, blknum, cando;
1390 fdu = FDUNIT(minor(dev));
1391 fd = devclass_get_softc(fd_devclass, fdu);
1393 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1394 (u_long)major(dev), (u_long)minor(dev));
1396 if (fd->type == NO_TYPE) {
1397 bp->b_error = ENXIO;
1398 bp->b_flags |= B_ERROR;
1402 fdblk = 128 << (fd->ft->secsize);
1403 if (bp->b_cmd != BUF_CMD_FORMAT) {
1404 if (bio->bio_offset < 0) {
1406 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n",
1407 fdu, bio->bio_offset, bp->b_bcount);
1408 bp->b_error = EINVAL;
1409 bp->b_flags |= B_ERROR;
1412 if ((bp->b_bcount % fdblk) != 0) {
1413 bp->b_error = EINVAL;
1414 bp->b_flags |= B_ERROR;
1420 * Set up block calculations.
1422 if (bio->bio_offset > 20000000LL * fdblk) {
1424 * Reject unreasonably high block number, prevent the
1425 * multiplication below from overflowing.
1427 bp->b_error = EINVAL;
1428 bp->b_flags |= B_ERROR;
1431 blknum = (unsigned)(bio->bio_offset / fdblk);
1432 nblocks = fd->ft->size;
1434 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1435 if (blknum <= nblocks) {
1436 cando = (nblocks - blknum) * fdblk;
1437 bp->b_resid = bp->b_bcount - cando;
1439 goto bad; /* not actually bad but EOF */
1441 bp->b_error = EINVAL;
1442 bp->b_flags |= B_ERROR;
1447 bio->bio_driver_info = dev;
1448 bioqdisksort(&fdc->bio_queue, bio);
1449 callout_stop(&fd->toffhandle);
1451 /* Tell devstat we are starting on the transaction */
1452 devstat_start_transaction(&fd->device_stats);
1453 device_busy(fd->dev);
1463 /***************************************************************\
1465 * We have just queued something.. if the controller is not busy *
1466 * then simulate the case where it has just finished a command *
1467 * So that it (the interrupt routine) looks on the queue for more*
1468 * work to do and picks up what we just added. *
1469 * If the controller is already busy, we need do nothing, as it *
1470 * will pick up our work when the present work completes *
1471 \***************************************************************/
1473 fdstart(struct fdc_data *fdc)
1476 if(fdc->state == DEVIDLE)
1484 fd_iotimeout(void *xfdc)
1489 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1492 * Due to IBM's brain-dead design, the FDC has a faked ready
1493 * signal, hardwired to ready == true. Thus, any command
1494 * issued if there's no diskette in the drive will _never_
1495 * complete, and must be aborted by resetting the FDC.
1496 * Many thanks, Big Blue!
1497 * The FDC must not be reset directly, since that would
1498 * interfere with the state machine. Instead, pretend that
1499 * the command completed but was invalid. The state machine
1500 * will reset the FDC and retry once.
1503 fdc->status[0] = NE7_ST0_IC_IV;
1504 fdc->flags &= ~FDC_STAT_VALID;
1505 fdc->state = IOTIMEDOUT;
1510 /* just ensure it is running in a critical section */
1512 fd_pseudointr(void *xfdc)
1519 /***********************************************************************\
1521 * keep calling the state machine until it returns a 0 *
1522 * ALWAYS called at SPLBIO *
1523 \***********************************************************************/
1525 fdc_intr(void *xfdc)
1533 * magic pseudo-DMA initialization for YE FDC. Sets count and
1536 #define SET_BCDR(fdc,wr,cnt,port) \
1537 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1538 ((cnt)-1) & 0xff); \
1539 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1540 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1543 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1545 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
1547 u_char *cptr = (u_char *)addr;
1549 if (cmd == BUF_CMD_READ) {
1550 if (fdc->state != PIOREAD) {
1551 fdc->state = PIOREAD;
1554 SET_BCDR(fdc, 0, count, 0);
1555 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1556 FDC_YE_DATAPORT, cptr, count);
1558 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1559 FDC_YE_DATAPORT, cptr, count);
1560 SET_BCDR(fdc, 0, count, 0);
1565 /***********************************************************************\
1566 * The controller state machine. *
1567 * if it returns a non zero value, it should be called again immediatly *
1568 \***********************************************************************/
1572 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1573 unsigned blknum = 0, b_cylinder = 0;
1574 fdu_t fdu = fdc->fdu;
1578 struct fd_formb *finfo = NULL;
1584 bio = bioq_first(&fdc->bio_queue);
1586 bioq_remove(&fdc->bio_queue, bio);
1591 /***********************************************\
1592 * nothing left for this controller to do *
1593 * Force into the IDLE state, *
1594 \***********************************************/
1595 fdc->state = DEVIDLE;
1597 device_printf(fdc->fdc_dev,
1598 "unexpected valid fd pointer\n");
1602 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1606 dev = bio->bio_driver_info;
1608 fdu = FDUNIT(minor(dev));
1609 fd = devclass_get_softc(fd_devclass, fdu);
1610 fdblk = 128 << fd->ft->secsize;
1611 if (fdc->fd && (fd != fdc->fd))
1612 device_printf(fd->dev, "confused fd pointers\n");
1613 read = (bp->b_cmd == BUF_CMD_READ);
1614 format = (bp->b_cmd == BUF_CMD_FORMAT);
1616 finfo = (struct fd_formb *)bp->b_data;
1617 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1620 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1621 blknum = (unsigned)(bio->bio_offset / fdblk) +
1623 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1625 TRACE1("fd%d", fdu);
1626 TRACE1("[%s]", fdstates[fdc->state]);
1627 TRACE1("(0x%x)", fd->flags);
1628 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
1632 case FINDWORK: /* we have found new work */
1637 fdc->fdctl_wr(fdc, fd->ft->trans);
1638 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1639 /*******************************************************\
1640 * If the next drive has a motor startup pending, then *
1641 * it will start up in its own good time *
1642 \*******************************************************/
1643 if(fd->flags & FD_MOTOR_WAIT) {
1644 fdc->state = MOTORWAIT;
1645 return (0); /* come back later */
1647 /*******************************************************\
1648 * Maybe if it's not starting, it SHOULD be starting *
1649 \*******************************************************/
1650 if (!(fd->flags & FD_MOTOR))
1652 fdc->state = MOTORWAIT;
1656 else /* at least make sure we are selected */
1658 set_motor(fdc, fd->fdsu, TURNON);
1660 if (fdc->flags & FDC_NEEDS_RESET) {
1661 fdc->state = RESETCTLR;
1662 fdc->flags &= ~FDC_NEEDS_RESET;
1664 fdc->state = DOSEEK;
1667 if (b_cylinder == (unsigned)fd->track)
1669 fdc->state = SEEKCOMPLETE;
1672 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1673 fd->fdsu, b_cylinder * fd->ft->steptrac,
1677 * seek command not accepted, looks like
1678 * the FDC went off to the Saints...
1680 fdc->retry = 6; /* try a reset */
1681 return(retrier(fdc));
1683 fd->track = FD_NO_TRACK;
1684 fdc->state = SEEKWAIT;
1685 return(0); /* will return later */
1687 /* allow heads to settle */
1688 callout_reset(&fdc->pseudointr_ch, hz / 16,
1689 fd_pseudointr, fdc);
1690 fdc->state = SEEKCOMPLETE;
1691 return(0); /* will return later */
1692 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1693 /* Make sure seek really happened*/
1694 if(fd->track == FD_NO_TRACK) {
1695 int descyl = b_cylinder * fd->ft->steptrac;
1698 * This might be a "ready changed" interrupt,
1699 * which cannot really happen since the
1700 * RDY pin is hardwired to + 5 volts. This
1701 * generally indicates a "bouncing" intr
1702 * line, so do one of the following:
1704 * When running on an enhanced FDC that is
1705 * known to not go stuck after responding
1706 * with INVALID, fetch all interrupt states
1707 * until seeing either an INVALID or a
1708 * real interrupt condition.
1710 * When running on a dumb old NE765, give
1711 * up immediately. The controller will
1712 * provide up to four dummy RC interrupt
1713 * conditions right after reset (for the
1714 * corresponding four drives), so this is
1715 * our only chance to get notice that it
1716 * was not the FDC that caused the interrupt.
1718 if (fd_sense_int(fdc, &st0, &cyl)
1721 if(fdc->fdct == FDC_NE765
1722 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1723 return 0; /* hope for a real intr */
1724 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1729 * seek to cyl 0 requested; make sure we are
1732 if (fd_sense_drive_status(fdc, &st3))
1734 if ((st3 & NE7_ST3_T0) == 0) {
1736 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1737 fdu, st3, NE7_ST3BITS);
1744 return (retrier(fdc));
1748 if (cyl != descyl) {
1750 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1751 fdu, descyl, cyl, st0);
1754 return (retrier(fdc));
1758 fd->track = b_cylinder;
1759 if (!(fdc->flags & FDC_NODMA)) {
1760 isa_dmastart(isa_dmabp(bp),
1761 bp->b_data+fd->skip,
1762 format ? bp->b_bcount : fdblk, fdc->dmachan);
1764 sectrac = fd->ft->sectrac;
1765 sec = blknum % (sectrac * fd->ft->heads);
1766 head = sec / sectrac;
1767 sec = sec % sectrac + 1;
1768 fd->hddrv = ((head&1)<<2)+fdu;
1772 /* make sure the drive is writable */
1773 if(fd_sense_drive_status(fdc, &st3) != 0)
1775 /* stuck controller? */
1776 if (!(fdc->flags & FDC_NODMA))
1777 isa_dmadone(isa_dmabp(bp),
1778 bp->b_data + fd->skip,
1779 format ? bp->b_bcount : fdblk,
1781 fdc->retry = 6; /* reset the beast */
1782 return (retrier(fdc));
1784 if(st3 & NE7_ST3_WP)
1787 * XXX YES! this is ugly.
1788 * in order to force the current operation
1789 * to fail, we will have to fake an FDC
1790 * error - all error handling is done
1793 fdc->status[0] = NE7_ST0_IC_AT;
1794 fdc->status[1] = NE7_ST1_NW;
1796 fdc->status[3] = fd->track;
1797 fdc->status[4] = head;
1798 fdc->status[5] = sec;
1799 fdc->retry = 8; /* break out immediately */
1800 fdc->state = IOTIMEDOUT; /* not really... */
1806 if (fdc->flags & FDC_NODMA) {
1808 * This seems to be necessary for
1809 * whatever obscure reason; if we omit
1810 * it, we end up filling the sector ID
1811 * fields of the newly formatted track
1812 * entirely with garbage, causing
1813 * `wrong cylinder' errors all over
1814 * the place when trying to read them
1819 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1821 (void)fdcpio(fdc,bp->b_cmd,
1822 bp->b_data+fd->skip,
1827 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1828 finfo->fd_formb_secshift,
1829 finfo->fd_formb_nsecs,
1830 finfo->fd_formb_gaplen,
1831 finfo->fd_formb_fillbyte, 0)) {
1832 /* controller fell over */
1833 if (!(fdc->flags & FDC_NODMA))
1834 isa_dmadone(isa_dmabp(bp),
1835 bp->b_data + fd->skip,
1836 format ? bp->b_bcount : fdblk,
1839 return (retrier(fdc));
1842 if (fdc->flags & FDC_NODMA) {
1844 * this seems to be necessary even when
1847 SET_BCDR(fdc, 1, fdblk, 0);
1850 * perform the write pseudo-DMA before
1851 * the WRITE command is sent
1854 (void)fdcpio(fdc,bp->b_cmd,
1855 bp->b_data+fd->skip,
1859 (read ? NE7CMD_READ : NE7CMD_WRITE),
1860 head << 2 | fdu, /* head & unit */
1861 fd->track, /* track */
1863 sec, /* sector + 1 */
1864 fd->ft->secsize, /* sector size */
1865 sectrac, /* sectors/track */
1866 fd->ft->gap, /* gap size */
1867 fd->ft->datalen, /* data length */
1869 /* the beast is sleeping again */
1870 if (!(fdc->flags & FDC_NODMA))
1871 isa_dmadone(isa_dmabp(bp),
1872 bp->b_data + fd->skip,
1873 format ? bp->b_bcount : fdblk,
1876 return (retrier(fdc));
1879 if (fdc->flags & FDC_NODMA)
1881 * if this is a read, then simply await interrupt
1882 * before performing PIO
1884 if (read && !fdcpio(fdc,bp->b_cmd,
1885 bp->b_data+fd->skip,fdblk)) {
1886 callout_reset(&fd->tohandle, hz,
1888 return(0); /* will return later */
1892 * write (or format) operation will fall through and
1893 * await completion interrupt
1895 fdc->state = IOCOMPLETE;
1896 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
1897 return (0); /* will return later */
1900 * actually perform the PIO read. The IOCOMPLETE case
1901 * removes the timeout for us.
1903 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
1904 fdc->state = IOCOMPLETE;
1906 case IOCOMPLETE: /* IO DONE, post-analyze */
1907 callout_stop(&fd->tohandle);
1909 if (fd_read_status(fdc, fd->fdsu)) {
1910 if (!(fdc->flags & FDC_NODMA)) {
1911 isa_dmadone(isa_dmabp(bp),
1912 bp->b_data + fd->skip,
1913 format ? bp->b_bcount : fdblk,
1917 fdc->retry = 6; /* force a reset */
1918 return (retrier(fdc));
1921 fdc->state = IOTIMEDOUT;
1926 if (!(fdc->flags & FDC_NODMA)) {
1927 isa_dmadone(isa_dmabp(bp),
1928 bp->b_data + fd->skip,
1929 format ? bp->b_bcount : fdblk, fdc->dmachan);
1931 if (fdc->status[0] & NE7_ST0_IC) {
1932 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1933 && fdc->status[1] & NE7_ST1_OR) {
1935 * DMA overrun. Someone hogged the bus and
1936 * didn't release it in time for the next
1939 * We normally restart this without bumping
1940 * the retry counter. However, in case
1941 * something is seriously messed up (like
1942 * broken hardware), we rather limit the
1943 * number of retries so the IO operation
1944 * doesn't block indefinately.
1946 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
1947 fdc->state = SEEKCOMPLETE;
1949 } /* else fall through */
1951 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
1953 fdc->retry = 6; /* force a reset */
1954 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1955 && fdc->status[2] & NE7_ST2_WC
1957 fdc->retry = 3; /* force recalibrate */
1958 return (retrier(fdc));
1961 /* Operation successful, retry DMA overruns again next time. */
1962 fdc->dma_overruns = 0;
1964 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
1965 /* set up next transfer */
1966 fdc->state = DOSEEK;
1971 device_unbusy(fd->dev);
1972 devstat_end_transaction_buf(&fd->device_stats, bp);
1976 fdc->state = FINDWORK;
1982 fdc->state = RESETCOMPLETE;
1986 * Discard all the results from the reset so that they
1987 * can't cause an unexpected interrupt later.
1989 for (i = 0; i < 4; i++)
1990 (void)fd_sense_int(fdc, &st0, &cyl);
1991 fdc->state = STARTRECAL;
1994 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
1997 return (retrier(fdc));
1999 fdc->state = RECALWAIT;
2000 return (0); /* will return later */
2002 /* allow heads to settle */
2003 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
2004 fdc->state = RECALCOMPLETE;
2005 return (0); /* will return later */
2009 * See SEEKCOMPLETE for a comment on this:
2011 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2013 if(fdc->fdct == FDC_NE765
2014 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2015 return 0; /* hope for a real intr */
2016 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2017 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2021 * a recalibrate from beyond cylinder 77
2022 * will "fail" due to the FDC limitations;
2023 * since people used to complain much about
2024 * the failure message, try not logging
2025 * this one if it seems to be the first
2028 printf("fd%d: recal failed ST0 %b cyl %d\n",
2029 fdu, st0, NE7_ST0BITS, cyl);
2030 if(fdc->retry < 3) fdc->retry = 3;
2031 return (retrier(fdc));
2034 /* Seek (probably) necessary */
2035 fdc->state = DOSEEK;
2036 return (1); /* will return immediatly */
2038 if(fd->flags & FD_MOTOR_WAIT)
2040 return (0); /* time's not up yet */
2042 if (fdc->flags & FDC_NEEDS_RESET) {
2043 fdc->state = RESETCTLR;
2044 fdc->flags &= ~FDC_NEEDS_RESET;
2047 * If all motors were off, then the controller was
2048 * reset, so it has lost track of the current
2049 * cylinder. Recalibrate to handle this case.
2050 * But first, discard the results of the reset.
2052 fdc->state = RESETCOMPLETE;
2054 return (1); /* will return immediatly */
2056 device_printf(fdc->fdc_dev, "unexpected FD int->");
2057 if (fd_read_status(fdc, fd->fdsu) == 0)
2058 printf("FDC status :%x %x %x %x %x %x %x ",
2067 printf("No status available ");
2068 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2070 printf("[controller is dead now]\n");
2073 printf("ST0 = %x, PCN = %x\n", st0, cyl);
2076 /*XXX confusing: some branches return immediately, others end up here*/
2077 return (1); /* Come back immediatly to new state */
2081 retrier(struct fdc_data *fdc)
2091 dev = bio->bio_driver_info;
2093 /* XXX shouldn't this be cached somewhere? */
2094 fdu = FDUNIT(minor(dev));
2095 fd = devclass_get_softc(fd_devclass, fdu);
2096 if (fd->options & FDOPT_NORETRY)
2099 switch (fdc->retry) {
2100 case 0: case 1: case 2:
2101 fdc->state = SEEKCOMPLETE;
2103 case 3: case 4: case 5:
2104 fdc->state = STARTRECAL;
2107 fdc->state = RESETCTLR;
2114 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2118 * note: use the correct device for more
2119 * verbose error reporting.
2123 subdev = make_sub_dev(dev,
2124 (FDUNIT(minor(dev))<<3)|RAW_PART);
2125 diskerr(bio, subdev,
2126 "hard error", LOG_PRINTF,
2127 fdc->fd->skip, NULL);
2130 if (fdc->flags & FDC_STAT_VALID)
2132 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2133 fdc->status[0], NE7_ST0BITS,
2134 fdc->status[1], NE7_ST1BITS,
2135 fdc->status[2], NE7_ST2BITS,
2136 fdc->status[3], fdc->status[4],
2139 printf(" (No status)\n");
2142 bp->b_flags |= B_ERROR;
2144 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2147 device_unbusy(fd->dev);
2148 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2150 fdc->state = FINDWORK;
2151 fdc->flags |= FDC_NEEDS_RESET;
2161 fdformat(dev_t dev, struct fd_formb *finfo, struct thread *td)
2170 fdu = FDUNIT(minor(dev));
2171 fd = devclass_get_softc(fd_devclass, fdu);
2172 fdblk = 128 << fd->ft->secsize;
2174 /* set up a buffer header for fdstrategy() */
2175 bp = malloc(sizeof(struct buf), M_TEMP, M_WAITOK | M_ZERO);
2178 BUF_LOCK(bp, LK_EXCLUSIVE);
2180 bp->b_flags = B_PAGING;
2181 bp->b_cmd = BUF_CMD_FORMAT;
2184 * calculate a fake blkno, so fdstrategy() would initiate a
2185 * seek to the requested cylinder
2187 bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
2188 (fd->ft->sectrac * fd->ft->heads)
2189 + finfo->head * fd->ft->sectrac) * fdblk;
2190 bp->b_bio1.bio_driver_info = dev;
2192 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2193 bp->b_data = (caddr_t)finfo;
2195 /* now do the format */
2196 dev_dstrategy(dev, &bp->b_bio1);
2198 /* ...and wait for it to complete */
2200 while (bp->b_cmd != BUF_CMD_DONE) {
2201 rv = tsleep((caddr_t)bp, 0, "fdform", 20 * hz);
2202 if (rv == EWOULDBLOCK)
2207 if (rv == EWOULDBLOCK) {
2210 device_unbusy(fd->dev);
2211 biodone(&bp->b_bio1);
2213 if (bp->b_flags & B_ERROR)
2216 * allow the process to be swapped
2225 * TODO: don't allocate buffer on stack.
2229 fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
2231 fdu_t fdu = FDUNIT(minor(dev));
2232 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2235 struct fd_type *fdt;
2236 struct disklabel *dl;
2237 struct fdc_status *fsp;
2238 char buffer[DEV_BSIZE];
2241 fdblk = 128 << fd->ft->secsize;
2245 bzero(buffer, sizeof (buffer));
2246 dl = (struct disklabel *)buffer;
2247 dl->d_secsize = fdblk;
2249 dl->d_secpercyl = fdt->size / fdt->tracks;
2250 dl->d_type = DTYPE_FLOPPY;
2252 if (readdisklabel(dev, dl)
2258 *(struct disklabel *)addr = *dl;
2262 if ((flag & FWRITE) == 0)
2267 if ((flag & FWRITE) == 0)
2272 if ((flag & FWRITE) == 0) {
2277 dl = (struct disklabel *)addr;
2279 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2283 error = writedisklabel(dev, (struct disklabel *)buffer);
2286 if ((flag & FWRITE) == 0)
2287 error = EBADF; /* must be opened for writing */
2288 else if (((struct fd_formb *)addr)->format_version !=
2290 error = EINVAL; /* wrong version of formatting prog */
2292 error = fdformat(dev, (struct fd_formb *)addr, td);
2295 case FD_GTYPE: /* get drive type */
2296 *(struct fd_type *)addr = *fd->ft;
2299 case FD_STYPE: /* set drive type */
2300 /* this is considered harmful; only allow for superuser */
2303 *fd->ft = *(struct fd_type *)addr;
2306 case FD_GOPTS: /* get drive options */
2307 *(int *)addr = fd->options;
2310 case FD_SOPTS: /* set drive options */
2311 fd->options = *(int *)addr;
2315 fsp = (struct fdc_status *)addr;
2316 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2318 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2329 * Hello emacs, these are the
2332 * c-continued-statement-offset: 8
2333 * c-continued-brace-offset: 0
2334 * c-brace-offset: -8
2335 * c-brace-imaginary-offset: 0
2336 * c-argdecl-indent: 8
2337 * c-label-offset: -8
2338 * c++-hanging-braces: 1
2339 * c++-access-specifier-offset: -8
2340 * c++-empty-arglist-indent: 8
2341 * c++-friend-offset: 0