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 $
59 #include <sys/param.h>
60 #include <sys/systm.h>
61 #include <sys/kernel.h>
65 #include <sys/diskslice.h>
67 #include <sys/devicestat.h>
68 #include <sys/fcntl.h>
69 #include <sys/malloc.h>
70 #include <sys/module.h>
73 #include <sys/syslog.h>
74 #include <sys/device.h>
77 #include <sys/thread2.h>
79 #include <machine/clock.h>
80 #include <machine/inttypes.h>
81 #include <machine/ioctl_fd.h>
82 #include <machine/stdarg.h>
84 #include <bus/isa/isavar.h>
85 #include <bus/isa/isareg.h>
88 #include <bus/isa/rtc.h>
90 /* configuration flags */
91 #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
92 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
94 /* internally used only, not really from CMOS: */
95 #define RTCFDT_144M_PRETENDED 0x1000
97 /* error returns for fd_cmd() */
99 #define FD_NOT_VALID -2
100 #define FDC_ERRMAX 100 /* do not log more */
102 * Stop retrying after this many DMA overruns. Since each retry takes
103 * one revolution, with 300 rpm., 25 retries take approximately 10
104 * seconds which the read attempt will block in case the DMA overrun
107 #define FDC_DMAOV_MAX 25
110 * Timeout value for the PIO loops to wait until the FDC main status
111 * register matches our expectations (request for master, direction
112 * bit). This is supposed to be a number of microseconds, although
113 * timing might actually not be very accurate.
115 * Timeouts of 100 msec are believed to be required for some broken
118 #define FDSTS_TIMEOUT 100000
121 #define NUMDENS (NUMTYPES - 7)
123 /* These defines (-1) must match index for fd_types */
124 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
125 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */
137 #define FD_1480in5_25 11
138 #define FD_1440in5_25 12
139 #define FD_820in5_25 13
140 #define FD_800in5_25 14
141 #define FD_720in5_25 15
142 #define FD_360in5_25 16
143 #define FD_640in5_25 17
146 static struct fd_type fd_types[NUMTYPES] =
148 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
149 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
150 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
151 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
152 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
153 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
154 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
155 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
156 { 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
157 { 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
159 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
160 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
161 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
162 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
163 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
164 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
165 { 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
168 #define DRVS_PER_CTLR 2 /* 2 floppies */
170 /***********************************************************************\
171 * Per controller structure. *
172 \***********************************************************************/
173 devclass_t fdc_devclass;
175 /***********************************************************************\
176 * Per drive structure. *
177 * N per controller (DRVS_PER_CTLR) *
178 \***********************************************************************/
180 struct fdc_data *fdc; /* pointer to controller structure */
181 int fdsu; /* this units number on this controller */
182 int type; /* Drive type (FD_1440...) */
183 struct fd_type ft; /* the type descriptor */
185 #define FD_OPEN 0x01 /* it's open */
186 #define FD_ACTIVE 0x02 /* it's active */
187 #define FD_MOTOR 0x04 /* motor should be on */
188 #define FD_MOTOR_WAIT 0x08 /* motor coming up */
191 #define FD_NO_TRACK -2
192 int track; /* where we think the head is */
193 int options; /* user configurable options, see ioctl_fd.h */
194 struct callout toffhandle;
195 struct callout tohandle;
196 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) kprintf(arg)
277 #define TRACE1(arg1, arg2) if(fd_debug) kprintf(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 = {
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 ksnprintf(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 ksnprintf(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,
589 * Now (finally!) allocate the control port.
592 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
594 0ul, ~0ul, 1, RF_ACTIVE);
595 if (fdc->res_ctl == 0) {
597 "cannot reserve control I/O port range\n");
600 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
601 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
604 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
605 &fdc->rid_irq, 0ul, ~0ul, 1,
607 if (fdc->res_irq == 0) {
608 device_printf(dev, "cannot reserve interrupt line\n");
612 if ((fdc->flags & FDC_NODMA) == 0) {
613 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
614 &fdc->rid_drq, 0ul, ~0ul, 1,
616 if (fdc->res_drq == 0) {
617 device_printf(dev, "cannot reserve DMA request line\n");
620 fdc->dmachan = fdc->res_drq->r_start;
627 fdc_release_resources(struct fdc_data *fdc)
632 if (fdc->res_irq != 0) {
633 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
635 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
638 if (fdc->res_ctl != 0) {
639 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
641 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
644 if (fdc->res_ioport != 0) {
645 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
647 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
650 if (fdc->res_drq != 0) {
651 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
653 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
658 /****************************************************************************/
659 /* autoconfiguration stuff */
660 /****************************************************************************/
662 static struct isa_pnp_id fdc_ids[] = {
663 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
664 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
669 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
671 struct fdc_ivars *ivars = device_get_ivars(child);
674 case FDC_IVAR_FDUNIT:
675 *result = ivars->fdunit;
684 * fdc controller section.
687 fdc_probe(device_t dev)
690 struct fdc_data *fdc;
692 fdc = device_get_softc(dev);
693 bzero(fdc, sizeof *fdc);
695 fdc->fdctl_wr = fdctl_wr_isa;
698 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
702 fdc->flags |= FDC_ISPNP;
704 /* Attempt to allocate our resources for the duration of the probe */
705 error = fdc_alloc_resources(fdc);
709 /* First - lets reset the floppy controller */
712 fdout_wr(fdc, FDO_FRST);
714 /* see if it can handle a command */
715 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
716 NE7_SPEC_2(2, 0), 0)) {
721 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
722 ic_type = (u_char)ic_type;
725 device_set_desc(dev, "NEC 765 or clone");
726 fdc->fdct = FDC_NE765;
729 device_set_desc(dev, "Intel 82077 or clone");
730 fdc->fdct = FDC_I82077;
733 device_set_desc(dev, "NEC 72065B or clone");
734 fdc->fdct = FDC_NE72065;
737 device_set_desc(dev, "generic floppy controller");
738 fdc->fdct = FDC_UNKNOWN;
744 fdc_release_resources(fdc);
749 * Add a child device to the fdc controller. It will then be probed etc.
752 fdc_add_child(device_t dev, const char *name, int unit)
755 struct fdc_ivars *ivar;
758 ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
759 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
761 child = device_add_child(dev, name, unit);
764 device_set_ivars(child, ivar);
765 if (resource_int_value(name, unit, "disabled", &disabled) == 0
767 device_disable(child);
771 fdc_attach(device_t dev)
773 struct fdc_data *fdc;
776 fdc = device_get_softc(dev);
778 callout_init(&fdc->pseudointr_ch);
780 error = fdc_alloc_resources(fdc);
782 device_printf(dev, "cannot reacquire resources\n");
785 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
787 &fdc->fdc_intr, NULL, NULL);
789 device_printf(dev, "cannot setup interrupt\n");
792 fdc->fdcu = device_get_unit(dev);
793 fdc->flags |= FDC_ATTACHED;
795 if ((fdc->flags & FDC_NODMA) == 0) {
796 /* Acquire the DMA channel forever, The driver will do the rest */
797 /* XXX should integrate with rman */
798 isa_dma_acquire(fdc->dmachan);
799 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
801 fdc->state = DEVIDLE;
803 /* reset controller, turn motor off, clear fdout mirror reg */
804 fdout_wr(fdc, ((fdc->fdout = 0)));
805 bioq_init(&fdc->bio_queue);
808 * Probe and attach any children. We should probably detect
809 * devices from the BIOS unless overridden.
811 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
813 i = resource_query_string(i, "at", device_get_nameunit(dev)))
814 fdc_add_child(dev, resource_query_name(i),
815 resource_query_unit(i));
817 return (bus_generic_attach(dev));
821 fdc_print_child(device_t me, device_t child)
825 retval += bus_print_child_header(me, child);
826 retval += kprintf(" on %s drive %d\n", device_get_nameunit(me),
827 fdc_get_fdunit(child));
832 static device_method_t fdc_methods[] = {
833 /* Device interface */
834 DEVMETHOD(device_probe, fdc_probe),
835 DEVMETHOD(device_attach, fdc_attach),
836 DEVMETHOD(device_detach, bus_generic_detach),
837 DEVMETHOD(device_shutdown, bus_generic_shutdown),
838 DEVMETHOD(device_suspend, bus_generic_suspend),
839 DEVMETHOD(device_resume, bus_generic_resume),
842 DEVMETHOD(bus_print_child, fdc_print_child),
843 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
844 /* Our children never use any other bus interface methods. */
849 static driver_t fdc_driver = {
852 sizeof(struct fdc_data)
855 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, NULL, NULL);
856 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, NULL, NULL);
858 /******************************************************************/
860 * devices attached to the controller section.
863 fd_probe(device_t dev)
868 struct fdc_data *fdc;
870 static int fd_fifo = 0;
872 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
873 fd = device_get_softc(dev);
874 fdc = device_get_softc(device_get_parent(dev));
876 bzero(fd, sizeof *fd);
880 fd->fdu = device_get_unit(dev);
883 /* look up what bios thinks we have */
886 if ((fdc->flags & FDC_ISPCMCIA))
888 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
889 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
891 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
894 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
901 fdt = RTCFDT_144M; /* XXX probably */
904 /* is there a unit? */
905 if (fdt == RTCFDT_NONE)
909 set_motor(fdc, fdsu, TURNON);
910 DELAY(1000000); /* 1 sec */
912 /* XXX This doesn't work before the first set_motor() */
913 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
914 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
915 && enable_fifo(fdc) == 0) {
916 device_printf(device_get_parent(dev),
917 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
921 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
922 && (st3 & NE7_ST3_T0)) {
923 /* if at track 0, first seek inwards */
924 /* seek some steps: */
925 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
926 DELAY(300000); /* ...wait a moment... */
927 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
930 /* If we're at track 0 first seek inwards. */
931 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
932 /* Seek some steps... */
933 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
934 /* ...wait a moment... */
936 /* make ctrlr happy: */
937 fd_sense_int(fdc, 0, 0);
941 for (i = 0; i < 2; i++) {
943 * we must recalibrate twice, just in case the
944 * heads have been beyond cylinder 76, since most
945 * FDCs still barf when attempting to recalibrate
949 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
950 /* a second being enough for full stroke seek*/
951 DELAY(i == 0 ? 1000000 : 300000);
953 /* anything responding? */
954 if (fd_sense_int(fdc, &st0, 0) == 0 &&
955 (st0 & NE7_ST0_EC) == 0)
956 break; /* already probed succesfully */
960 set_motor(fdc, fdsu, TURNOFF);
962 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
965 fd->track = FD_NO_TRACK;
969 callout_init(&fd->toffhandle);
970 callout_init(&fd->tohandle);
971 callout_init(&fd->motor);
975 device_set_desc(dev, "1200-KB 5.25\" drive");
978 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
979 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
983 device_set_desc(dev, "1440-KB 3.5\" drive");
988 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
992 device_set_desc(dev, "360-KB 5.25\" drive");
996 kprintf("720-KB 3.5\" drive");
1002 fd->ft = fd_types[fd->type - 1];
1007 fd_attach(device_t dev)
1009 struct disk_info info;
1013 fd = device_get_softc(dev);
1015 disk_create(fd->fdu, &fd->disk, &fd_ops);
1016 disk_setdisktype(&fd->disk, "floppy");
1019 * Make special raw floppy devices with preset types to
1020 * make formatting easier. These override the disk management
1021 * layer for the whole-slice-disk for partitions 128-191. Note
1022 * that we do not override partition 255, which is the
1023 * whole-slice-part. If we did we would have to provide our
1024 * own DIOCGPART ioctl.
1026 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 1),
1027 UID_ROOT, GID_WHEEL, 0600, "fd%d.1720", fd->fdu);
1028 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 2),
1029 UID_ROOT, GID_WHEEL, 0600, "fd%d.1480", fd->fdu);
1030 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 3),
1031 UID_ROOT, GID_WHEEL, 0600, "fd%d.1440", fd->fdu);
1032 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 4),
1033 UID_ROOT, GID_WHEEL, 0600, "fd%d.1200", fd->fdu);
1034 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 5),
1035 UID_ROOT, GID_WHEEL, 0600, "fd%d.820", fd->fdu);
1036 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 6),
1037 UID_ROOT, GID_WHEEL, 0600, "fd%d.800", fd->fdu);
1038 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 7),
1039 UID_ROOT, GID_WHEEL, 0600, "fd%d.720", fd->fdu);
1040 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 8),
1041 UID_ROOT, GID_WHEEL, 0600, "fd%d.360", fd->fdu);
1042 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 9),
1043 UID_ROOT, GID_WHEEL, 0600, "fd%d.640", fd->fdu);
1044 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 10),
1045 UID_ROOT, GID_WHEEL, 0600, "fd%d.1232", fd->fdu);
1047 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1048 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1049 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1050 DEVSTAT_PRIORITY_FD);
1052 if (fd->type != NO_TYPE) {
1053 bzero(&info, sizeof(info));
1054 ft = &fd_types[fd->type - 1];
1055 info.d_media_blksize = 128 << ft->secsize;
1056 info.d_media_blocks = ft->size;
1057 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1058 info.d_nheads = ft->heads;
1059 info.d_secpertrack = ft->sectrac;
1060 info.d_secpercyl = ft->sectrac * ft->heads;
1061 info.d_ncylinders = ft->size / info.d_secpercyl;
1062 disk_setdiskinfo(&fd->disk, &info);
1068 fd_detach(device_t dev)
1072 fd = device_get_softc(dev);
1073 kprintf("devfs: Please make sure that only the right fd device was removed!!!\n");
1074 dev_ops_remove_minor(&fd_ops,
1075 /*dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),*/
1076 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128));
1077 disk_invalidate(&fd->disk);
1078 disk_destroy(&fd->disk);
1079 devstat_remove_entry(&fd->device_stats);
1080 callout_stop(&fd->toffhandle);
1081 callout_stop(&fd->motor);
1086 static device_method_t fd_methods[] = {
1087 /* Device interface */
1088 DEVMETHOD(device_probe, fd_probe),
1089 DEVMETHOD(device_attach, fd_attach),
1090 DEVMETHOD(device_detach, fd_detach),
1091 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1092 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1093 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1098 static driver_t fd_driver = {
1101 sizeof(struct fd_data)
1104 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, NULL, NULL);
1106 /****************************************************************************/
1107 /* motor control stuff */
1108 /* remember to not deselect the drive we're working on */
1109 /****************************************************************************/
1111 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1113 int fdout = fdc->fdout;
1114 int needspecify = 0;
1117 fdout &= ~FDO_FDSEL;
1118 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1120 fdout &= ~(FDO_MOEN0 << fdsu);
1123 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1124 /* gonna turn off the last drive, put FDC to bed */
1125 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1127 /* make sure controller is selected and specified */
1128 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1130 fdout |= (FDO_FRST|FDO_FDMAEN);
1133 fdout_wr(fdc, fdout);
1135 TRACE1("[0x%x->FDOUT]", fdout);
1140 * special case: since we have just woken up the FDC
1141 * from its sleep, we silently assume the command will
1142 * be accepted, and do not test for a timeout
1144 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1145 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1147 if (fdc->flags & FDC_HAS_FIFO)
1148 (void) enable_fifo(fdc);
1153 fd_turnoff(void *xfd)
1157 TRACE1("[fd%d: turnoff]", fd->fdu);
1161 * Don't turn off the motor yet if the drive is active.
1163 * If we got here, this could only mean we missed an interrupt.
1164 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1165 * after a controller reset. Just schedule a pseudo-interrupt
1166 * so the state machine gets re-entered.
1168 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1174 fd->flags &= ~FD_MOTOR;
1175 set_motor(fd->fdc, fd->fdsu, TURNOFF);
1180 fd_motor_on(void *xfd)
1185 fd->flags &= ~FD_MOTOR_WAIT;
1186 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1196 if(!(fd->flags & FD_MOTOR))
1198 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1199 set_motor(fd->fdc, fd->fdsu, TURNON);
1200 callout_reset(&fd->motor, hz, fd_motor_on, fd);
1205 fdc_reset(fdc_p fdc)
1207 /* Try a reset, keep motor on */
1208 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1209 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1211 /* enable FDC, but defer interrupts a moment */
1212 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1213 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1215 fdout_wr(fdc, fdc->fdout);
1216 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1218 /* XXX after a reset, silently believe the FDC will accept commands */
1219 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1220 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1222 if (fdc->flags & FDC_HAS_FIFO)
1223 (void) enable_fifo(fdc);
1226 /****************************************************************************/
1228 /****************************************************************************/
1230 * FDC IO functions, take care of the main status register, timeout
1231 * in case the desired status bits are never set.
1233 * These PIO loops initially start out with short delays between
1234 * each iteration in the expectation that the required condition
1235 * is usually met quickly, so it can be handled immediately. After
1236 * about 1 ms, stepping is increased to achieve a better timing
1237 * accuracy in the calls to DELAY().
1240 fd_in(struct fdc_data *fdc, int *ptr)
1244 for (j = 0, step = 1;
1245 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1249 return (fdc_err(fdc, "ready for output in input\n"));
1254 if (j >= FDSTS_TIMEOUT)
1255 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1258 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1261 #else /* !FDC_DEBUG */
1266 #endif /* FDC_DEBUG */
1270 out_fdc(struct fdc_data *fdc, int x)
1274 for (j = 0, step = 1;
1275 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1278 if (i == (NE7_DIO|NE7_RQM))
1279 return (fdc_err(fdc, "ready for input in output\n"));
1284 if (j >= FDSTS_TIMEOUT)
1285 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1287 /* Send the command and return */
1289 TRACE1("[0x%x->FDDATA]", x);
1293 /****************************************************************************/
1294 /* fdopen/fdclose */
1295 /****************************************************************************/
1297 Fdopen(struct dev_open_args *ap)
1299 cdev_t dev = ap->a_head.a_dev;
1300 fdu_t fdu = dkunit(dev);
1301 struct disk_info info;
1309 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1312 if ((fdc == NULL) || (fd->type == NO_TYPE))
1316 * Figure out the type of floppy. There are special whole-disk-device
1317 * overrides that will override the current type.
1320 if (type == WHOLE_SLICE_PART) {
1321 type = fd->type; /* do not change selected type data */
1323 } else if (type > 128) {
1324 type -= 128; /* set to specific format */
1327 type = fd->type; /* reset to default */
1332 if (type != fd->type) {
1334 * For each type of basic drive, make sure we are trying
1335 * to open a type it can do,
1350 type = FD_1480in5_25;
1353 type = FD_1440in5_25;
1358 type = FD_820in5_25;
1361 type = FD_800in5_25;
1364 type = FD_720in5_25;
1367 type = FD_640in5_25;
1370 type = FD_360in5_25;
1377 if ( type != FD_1720
1391 * fd->type is the basic drive type, not the current format
1392 * we are reading. We only change the type when opening the
1393 * whole-slice-partition
1396 fd->ft = fd_types[type - 1];
1397 fd->flags |= FD_OPEN;
1400 * Clearing the DMA overrun counter at open time is a bit messy.
1401 * Since we're only managing one counter per controller, opening
1402 * the second drive could mess it up. Anyway, if the DMA overrun
1403 * condition is really persistent, it will eventually time out
1404 * still. OTOH, clearing it here will ensure we'll at least start
1405 * trying again after a previous (maybe even long ago) failure.
1406 * Also, this is merely a stop-gap measure only that should not
1407 * happen during normal operation, so we can tolerate it to be a
1408 * bit sloppy about this.
1410 fdc->dma_overruns = 0;
1413 * Set disk parameters for the disk management layer.
1415 * Note that we do not set RAWEXTENSIONS here. We override
1416 * the minor numbers in the raw-extension range and handle them
1419 bzero(&info, sizeof(info));
1421 info.d_media_blksize = 128 << ft->secsize;
1422 info.d_media_blocks = ft->size;
1423 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1424 info.d_nheads = ft->heads;
1425 info.d_secpertrack = ft->sectrac;
1426 info.d_secpercyl = ft->sectrac * ft->heads;
1427 info.d_ncylinders = ft->size / info.d_secpercyl;
1428 disk_setdiskinfo(&fd->disk, &info);
1434 fdclose(struct dev_close_args *ap)
1436 cdev_t dev = ap->a_head.a_dev;
1437 fdu_t fdu = dkunit(dev);
1440 fd = devclass_get_softc(fd_devclass, fdu);
1441 fd->flags &= ~FD_OPEN;
1442 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1447 /****************************************************************************/
1449 /****************************************************************************/
1451 fdstrategy(struct dev_strategy_args *ap)
1453 cdev_t dev = ap->a_head.a_dev;
1454 struct bio *bio = ap->a_bio;
1455 struct buf *bp = bio->bio_buf;
1456 unsigned nblocks, blknum, cando;
1463 fd = devclass_get_softc(fd_devclass, fdu);
1465 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1466 (u_long)major(dev), (u_long)minor(dev));
1468 if (fd->type == NO_TYPE) {
1469 bp->b_error = ENXIO;
1470 bp->b_flags |= B_ERROR;
1474 fdblk = 128 << (fd->ft.secsize);
1475 if (bp->b_cmd != BUF_CMD_FORMAT) {
1476 if (bio->bio_offset < 0) {
1478 "fd%d: fdstrat: bad request offset = %"PRId64", bcount = %d\n",
1479 fdu, bio->bio_offset, bp->b_bcount);
1480 bp->b_error = EINVAL;
1481 bp->b_flags |= B_ERROR;
1484 if ((bp->b_bcount % fdblk) != 0) {
1485 bp->b_error = EINVAL;
1486 bp->b_flags |= B_ERROR;
1492 * Set up block calculations.
1494 if (bio->bio_offset > 20000000LL * fdblk) {
1496 * Reject unreasonably high block number, prevent the
1497 * multiplication below from overflowing.
1499 bp->b_error = EINVAL;
1500 bp->b_flags |= B_ERROR;
1503 blknum = (unsigned)(bio->bio_offset / fdblk);
1504 nblocks = fd->ft.size;
1506 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1507 if (blknum <= nblocks) {
1508 cando = (nblocks - blknum) * fdblk;
1509 bp->b_resid = bp->b_bcount - cando;
1511 goto bad; /* not actually bad but EOF */
1513 bp->b_error = EINVAL;
1514 bp->b_flags |= B_ERROR;
1519 bio->bio_driver_info = dev;
1520 bioqdisksort(&fdc->bio_queue, bio);
1521 callout_stop(&fd->toffhandle);
1523 /* Tell devstat we are starting on the transaction */
1524 devstat_start_transaction(&fd->device_stats);
1526 device_busy(fd->dev);
1537 /***************************************************************\
1539 * We have just queued something.. if the controller is not busy *
1540 * then simulate the case where it has just finished a command *
1541 * So that it (the interrupt routine) looks on the queue for more*
1542 * work to do and picks up what we just added. *
1543 * If the controller is already busy, we need do nothing, as it *
1544 * will pick up our work when the present work completes *
1545 \***************************************************************/
1547 fdstart(struct fdc_data *fdc)
1550 if(fdc->state == DEVIDLE)
1558 fd_iotimeout(void *xfdc)
1563 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1566 * Due to IBM's brain-dead design, the FDC has a faked ready
1567 * signal, hardwired to ready == true. Thus, any command
1568 * issued if there's no diskette in the drive will _never_
1569 * complete, and must be aborted by resetting the FDC.
1570 * Many thanks, Big Blue!
1571 * The FDC must not be reset directly, since that would
1572 * interfere with the state machine. Instead, pretend that
1573 * the command completed but was invalid. The state machine
1574 * will reset the FDC and retry once.
1577 fdc->status[0] = NE7_ST0_IC_IV;
1578 fdc->flags &= ~FDC_STAT_VALID;
1579 fdc->state = IOTIMEDOUT;
1584 /* just ensure it is running in a critical section */
1586 fd_pseudointr(void *xfdc)
1593 /***********************************************************************\
1595 * keep calling the state machine until it returns a 0 *
1596 * ALWAYS called at SPLBIO *
1597 \***********************************************************************/
1599 fdc_intr(void *xfdc)
1607 * magic pseudo-DMA initialization for YE FDC. Sets count and
1610 #define SET_BCDR(fdc,wr,cnt,port) \
1611 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1612 ((cnt)-1) & 0xff); \
1613 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1614 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1617 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1619 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
1621 u_char *cptr = (u_char *)addr;
1623 if (cmd == BUF_CMD_READ) {
1624 if (fdc->state != PIOREAD) {
1625 fdc->state = PIOREAD;
1628 SET_BCDR(fdc, 0, count, 0);
1629 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1630 FDC_YE_DATAPORT, cptr, count);
1632 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1633 FDC_YE_DATAPORT, cptr, count);
1634 SET_BCDR(fdc, 0, count, 0);
1639 /***********************************************************************\
1640 * The controller state machine. *
1641 * if it returns a non zero value, it should be called again immediatly *
1642 \***********************************************************************/
1646 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1647 unsigned blknum = 0, b_cylinder = 0;
1652 struct fd_formb *finfo = NULL;
1658 bio = bioq_first(&fdc->bio_queue);
1660 bioq_remove(&fdc->bio_queue, bio);
1665 /***********************************************\
1666 * nothing left for this controller to do *
1667 * Force into the IDLE state, *
1668 \***********************************************/
1669 fdc->state = DEVIDLE;
1671 device_printf(fdc->fdc_dev,
1672 "unexpected valid fd pointer\n");
1676 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1680 dev = bio->bio_driver_info;
1683 fd = devclass_get_softc(fd_devclass, fdu);
1684 fdblk = 128 << fd->ft.secsize;
1685 if (fdc->fd && (fd != fdc->fd))
1686 device_printf(fd->dev, "confused fd pointers\n");
1687 read = (bp->b_cmd == BUF_CMD_READ);
1688 format = (bp->b_cmd == BUF_CMD_FORMAT);
1690 finfo = (struct fd_formb *)bp->b_data;
1691 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1694 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1695 blknum = (unsigned)(bio->bio_offset / fdblk) +
1697 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads);
1699 TRACE1("fd%d", fdu);
1700 TRACE1("[%s]", fdstates[fdc->state]);
1701 TRACE1("(0x%x)", fd->flags);
1702 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
1706 case FINDWORK: /* we have found new work */
1711 fdc->fdctl_wr(fdc, fd->ft.trans);
1712 TRACE1("[0x%x->FDCTL]", fd->ft.trans);
1713 /*******************************************************\
1714 * If the next drive has a motor startup pending, then *
1715 * it will start up in its own good time *
1716 \*******************************************************/
1717 if(fd->flags & FD_MOTOR_WAIT) {
1718 fdc->state = MOTORWAIT;
1719 return (0); /* come back later */
1721 /*******************************************************\
1722 * Maybe if it's not starting, it SHOULD be starting *
1723 \*******************************************************/
1724 if (!(fd->flags & FD_MOTOR))
1726 fdc->state = MOTORWAIT;
1730 else /* at least make sure we are selected */
1732 set_motor(fdc, fd->fdsu, TURNON);
1734 if (fdc->flags & FDC_NEEDS_RESET) {
1735 fdc->state = RESETCTLR;
1736 fdc->flags &= ~FDC_NEEDS_RESET;
1738 fdc->state = DOSEEK;
1741 if (b_cylinder == (unsigned)fd->track)
1743 fdc->state = SEEKCOMPLETE;
1746 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1747 fd->fdsu, b_cylinder * fd->ft.steptrac,
1751 * seek command not accepted, looks like
1752 * the FDC went off to the Saints...
1754 fdc->retry = 6; /* try a reset */
1755 return(retrier(fdc));
1757 fd->track = FD_NO_TRACK;
1758 fdc->state = SEEKWAIT;
1759 return(0); /* will return later */
1761 /* allow heads to settle */
1762 callout_reset(&fdc->pseudointr_ch, hz / 16,
1763 fd_pseudointr, fdc);
1764 fdc->state = SEEKCOMPLETE;
1765 return(0); /* will return later */
1766 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1767 /* Make sure seek really happened*/
1768 if(fd->track == FD_NO_TRACK) {
1769 int descyl = b_cylinder * fd->ft.steptrac;
1772 * This might be a "ready changed" interrupt,
1773 * which cannot really happen since the
1774 * RDY pin is hardwired to + 5 volts. This
1775 * generally indicates a "bouncing" intr
1776 * line, so do one of the following:
1778 * When running on an enhanced FDC that is
1779 * known to not go stuck after responding
1780 * with INVALID, fetch all interrupt states
1781 * until seeing either an INVALID or a
1782 * real interrupt condition.
1784 * When running on a dumb old NE765, give
1785 * up immediately. The controller will
1786 * provide up to four dummy RC interrupt
1787 * conditions right after reset (for the
1788 * corresponding four drives), so this is
1789 * our only chance to get notice that it
1790 * was not the FDC that caused the interrupt.
1792 if (fd_sense_int(fdc, &st0, &cyl)
1795 if(fdc->fdct == FDC_NE765
1796 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1797 return 0; /* hope for a real intr */
1798 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1803 * seek to cyl 0 requested; make sure we are
1806 if (fd_sense_drive_status(fdc, &st3))
1808 if ((st3 & NE7_ST3_T0) == 0) {
1810 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1811 fdu, st3, NE7_ST3BITS);
1818 return (retrier(fdc));
1822 if (cyl != descyl) {
1824 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1825 fdu, descyl, cyl, st0);
1828 return (retrier(fdc));
1832 fd->track = b_cylinder;
1833 if (!(fdc->flags & FDC_NODMA)) {
1834 isa_dmastart(isa_dmabp(bp),
1835 bp->b_data+fd->skip,
1836 format ? bp->b_bcount : fdblk, fdc->dmachan);
1838 sectrac = fd->ft.sectrac;
1839 sec = blknum % (sectrac * fd->ft.heads);
1840 head = sec / sectrac;
1841 sec = sec % sectrac + 1;
1842 fd->hddrv = ((head&1)<<2)+fdu;
1846 /* make sure the drive is writable */
1847 if(fd_sense_drive_status(fdc, &st3) != 0)
1849 /* stuck controller? */
1850 if (!(fdc->flags & FDC_NODMA))
1851 isa_dmadone(isa_dmabp(bp),
1852 bp->b_data + fd->skip,
1853 format ? bp->b_bcount : fdblk,
1855 fdc->retry = 6; /* reset the beast */
1856 return (retrier(fdc));
1858 if(st3 & NE7_ST3_WP)
1861 * XXX YES! this is ugly.
1862 * in order to force the current operation
1863 * to fail, we will have to fake an FDC
1864 * error - all error handling is done
1867 fdc->status[0] = NE7_ST0_IC_AT;
1868 fdc->status[1] = NE7_ST1_NW;
1870 fdc->status[3] = fd->track;
1871 fdc->status[4] = head;
1872 fdc->status[5] = sec;
1873 fdc->retry = 8; /* break out immediately */
1874 fdc->state = IOTIMEDOUT; /* not really... */
1880 if (fdc->flags & FDC_NODMA) {
1882 * This seems to be necessary for
1883 * whatever obscure reason; if we omit
1884 * it, we end up filling the sector ID
1885 * fields of the newly formatted track
1886 * entirely with garbage, causing
1887 * `wrong cylinder' errors all over
1888 * the place when trying to read them
1893 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1895 (void)fdcpio(fdc,bp->b_cmd,
1896 bp->b_data+fd->skip,
1901 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1902 finfo->fd_formb_secshift,
1903 finfo->fd_formb_nsecs,
1904 finfo->fd_formb_gaplen,
1905 finfo->fd_formb_fillbyte, 0)) {
1906 /* controller fell over */
1907 if (!(fdc->flags & FDC_NODMA))
1908 isa_dmadone(isa_dmabp(bp),
1909 bp->b_data + fd->skip,
1910 format ? bp->b_bcount : fdblk,
1913 return (retrier(fdc));
1916 if (fdc->flags & FDC_NODMA) {
1918 * this seems to be necessary even when
1921 SET_BCDR(fdc, 1, fdblk, 0);
1924 * perform the write pseudo-DMA before
1925 * the WRITE command is sent
1928 (void)fdcpio(fdc,bp->b_cmd,
1929 bp->b_data+fd->skip,
1933 (read ? NE7CMD_READ : NE7CMD_WRITE),
1934 head << 2 | fdu, /* head & unit */
1935 fd->track, /* track */
1937 sec, /* sector + 1 */
1938 fd->ft.secsize, /* sector size */
1939 sectrac, /* sectors/track */
1940 fd->ft.gap, /* gap size */
1941 fd->ft.datalen, /* data length */
1943 /* the beast is sleeping again */
1944 if (!(fdc->flags & FDC_NODMA))
1945 isa_dmadone(isa_dmabp(bp),
1946 bp->b_data + fd->skip,
1947 format ? bp->b_bcount : fdblk,
1950 return (retrier(fdc));
1953 if (fdc->flags & FDC_NODMA)
1955 * if this is a read, then simply await interrupt
1956 * before performing PIO
1958 if (read && !fdcpio(fdc,bp->b_cmd,
1959 bp->b_data+fd->skip,fdblk)) {
1960 callout_reset(&fd->tohandle, hz,
1962 return(0); /* will return later */
1966 * write (or format) operation will fall through and
1967 * await completion interrupt
1969 fdc->state = IOCOMPLETE;
1970 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
1971 return (0); /* will return later */
1974 * actually perform the PIO read. The IOCOMPLETE case
1975 * removes the timeout for us.
1977 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
1978 fdc->state = IOCOMPLETE;
1980 case IOCOMPLETE: /* IO DONE, post-analyze */
1981 callout_stop(&fd->tohandle);
1983 if (fd_read_status(fdc, fd->fdsu)) {
1984 if (!(fdc->flags & FDC_NODMA)) {
1985 isa_dmadone(isa_dmabp(bp),
1986 bp->b_data + fd->skip,
1987 format ? bp->b_bcount : fdblk,
1991 fdc->retry = 6; /* force a reset */
1992 return (retrier(fdc));
1995 fdc->state = IOTIMEDOUT;
2000 if (!(fdc->flags & FDC_NODMA)) {
2001 isa_dmadone(isa_dmabp(bp),
2002 bp->b_data + fd->skip,
2003 format ? bp->b_bcount : fdblk, fdc->dmachan);
2005 if (fdc->status[0] & NE7_ST0_IC) {
2006 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2007 && fdc->status[1] & NE7_ST1_OR) {
2009 * DMA overrun. Someone hogged the bus and
2010 * didn't release it in time for the next
2013 * We normally restart this without bumping
2014 * the retry counter. However, in case
2015 * something is seriously messed up (like
2016 * broken hardware), we rather limit the
2017 * number of retries so the IO operation
2018 * doesn't block indefinately.
2020 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
2021 fdc->state = SEEKCOMPLETE;
2023 } /* else fall through */
2025 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
2027 fdc->retry = 6; /* force a reset */
2028 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2029 && fdc->status[2] & NE7_ST2_WC
2031 fdc->retry = 3; /* force recalibrate */
2032 return (retrier(fdc));
2035 /* Operation successful, retry DMA overruns again next time. */
2036 fdc->dma_overruns = 0;
2038 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
2039 /* set up next transfer */
2040 fdc->state = DOSEEK;
2046 device_unbusy(fd->dev);
2048 devstat_end_transaction_buf(&fd->device_stats, bp);
2052 fdc->state = FINDWORK;
2058 fdc->state = RESETCOMPLETE;
2062 * Discard all the results from the reset so that they
2063 * can't cause an unexpected interrupt later.
2065 for (i = 0; i < 4; i++)
2066 (void)fd_sense_int(fdc, &st0, &cyl);
2067 fdc->state = STARTRECAL;
2070 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
2073 return (retrier(fdc));
2075 fdc->state = RECALWAIT;
2076 return (0); /* will return later */
2078 /* allow heads to settle */
2079 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
2080 fdc->state = RECALCOMPLETE;
2081 return (0); /* will return later */
2085 * See SEEKCOMPLETE for a comment on this:
2087 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2089 if(fdc->fdct == FDC_NE765
2090 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2091 return 0; /* hope for a real intr */
2092 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2093 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2097 * a recalibrate from beyond cylinder 77
2098 * will "fail" due to the FDC limitations;
2099 * since people used to complain much about
2100 * the failure message, try not logging
2101 * this one if it seems to be the first
2104 kprintf("fd%d: recal failed ST0 %b cyl %d\n",
2105 fdu, st0, NE7_ST0BITS, cyl);
2106 if(fdc->retry < 3) fdc->retry = 3;
2107 return (retrier(fdc));
2110 /* Seek (probably) necessary */
2111 fdc->state = DOSEEK;
2112 return (1); /* will return immediatly */
2114 if(fd->flags & FD_MOTOR_WAIT)
2116 return (0); /* time's not up yet */
2118 if (fdc->flags & FDC_NEEDS_RESET) {
2119 fdc->state = RESETCTLR;
2120 fdc->flags &= ~FDC_NEEDS_RESET;
2123 * If all motors were off, then the controller was
2124 * reset, so it has lost track of the current
2125 * cylinder. Recalibrate to handle this case.
2126 * But first, discard the results of the reset.
2128 fdc->state = RESETCOMPLETE;
2130 return (1); /* will return immediatly */
2132 device_printf(fdc->fdc_dev, "unexpected FD int->");
2133 if (fd_read_status(fdc, fd->fdsu) == 0)
2134 kprintf("FDC status :%x %x %x %x %x %x %x ",
2143 kprintf("No status available ");
2144 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2146 kprintf("[controller is dead now]\n");
2149 kprintf("ST0 = %x, PCN = %x\n", st0, cyl);
2152 /*XXX confusing: some branches return immediately, others end up here*/
2153 return (1); /* Come back immediatly to new state */
2157 retrier(struct fdc_data *fdc)
2167 dev = bio->bio_driver_info;
2169 /* XXX shouldn't this be cached somewhere? */
2171 fd = devclass_get_softc(fd_devclass, fdu);
2172 if (fd->options & FDOPT_NORETRY)
2175 switch (fdc->retry) {
2176 case 0: case 1: case 2:
2177 fdc->state = SEEKCOMPLETE;
2179 case 3: case 4: case 5:
2180 fdc->state = STARTRECAL;
2183 fdc->state = RESETCTLR;
2190 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2194 * note: use the correct device for more
2195 * verbose error reporting.
2198 "hard error", LOG_PRINTF,
2202 if (fdc->flags & FDC_STAT_VALID)
2204 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2205 fdc->status[0], NE7_ST0BITS,
2206 fdc->status[1], NE7_ST1BITS,
2207 fdc->status[2], NE7_ST2BITS,
2208 fdc->status[3], fdc->status[4],
2211 kprintf(" (No status)\n");
2214 bp->b_flags |= B_ERROR;
2216 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2220 device_unbusy(fd->dev);
2222 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2224 fdc->state = FINDWORK;
2225 fdc->flags |= FDC_NEEDS_RESET;
2235 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred)
2244 fd = devclass_get_softc(fd_devclass, fdu);
2245 fdblk = 128 << fd->ft.secsize;
2247 /* set up a buffer header for fdstrategy() */
2249 bp->b_cmd = BUF_CMD_FORMAT;
2252 * calculate a fake blkno, so fdstrategy() would initiate a
2253 * seek to the requested cylinder
2255 bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
2256 (fd->ft.sectrac * fd->ft.heads)
2257 + finfo->head * fd->ft.sectrac) * fdblk;
2258 bp->b_bio1.bio_driver_info = dev;
2259 bp->b_bio1.bio_flags |= BIO_SYNC;
2260 bp->b_bio1.bio_done = biodone_sync;
2262 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2263 bp->b_data = (caddr_t)finfo;
2265 /* now do the format */
2266 dev_dstrategy(dev, &bp->b_bio1);
2268 /* ...and wait for it to complete */
2269 rv = biowait_timeout(&bp->b_bio1, "fdform", 20 * hz);
2270 if (rv == EWOULDBLOCK) {
2274 device_unbusy(fd->dev);
2276 biodone(&bp->b_bio1);
2278 if (bp->b_flags & B_ERROR)
2281 * allow the process to be swapped
2288 * TODO: don't allocate buffer on stack.
2292 fdioctl(struct dev_ioctl_args *ap)
2294 cdev_t dev = ap->a_head.a_dev;
2295 fdu_t fdu = dkunit(dev);
2296 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2297 struct fdc_status *fsp;
2300 switch (ap->a_cmd) {
2302 if ((ap->a_fflag & FWRITE) == 0)
2303 error = EBADF; /* must be opened for writing */
2304 else if (((struct fd_formb *)ap->a_data)->format_version !=
2306 error = EINVAL; /* wrong version of formatting prog */
2308 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred);
2311 case FD_GTYPE: /* get drive type */
2312 *(struct fd_type *)ap->a_data = fd->ft;
2315 case FD_STYPE: /* set drive type */
2316 /* this is considered harmful; only allow for superuser */
2317 if (priv_check_cred(ap->a_cred, PRIV_ROOT, 0) != 0)
2319 fd->ft = *(struct fd_type *)ap->a_data;
2322 case FD_GOPTS: /* get drive options */
2323 *(int *)ap->a_data = fd->options;
2326 case FD_SOPTS: /* set drive options */
2327 fd->options = *(int *)ap->a_data;
2331 fsp = (struct fdc_status *)ap->a_data;
2332 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2334 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));