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/bootmaj.h>
62 #include <sys/kernel.h>
66 #include <sys/diskslice.h>
68 #include <sys/devicestat.h>
69 #include <sys/fcntl.h>
70 #include <sys/malloc.h>
71 #include <sys/module.h>
74 #include <sys/syslog.h>
75 #include <sys/device.h>
79 #include <sys/thread2.h>
81 #include <machine/clock.h>
82 #include <machine/inttypes.h>
83 #include <machine/ioctl_fd.h>
84 #include <machine/stdarg.h>
86 #include <bus/isa/isavar.h>
87 #include <bus/isa/isareg.h>
90 #include <bus/isa/rtc.h>
92 /* configuration flags */
93 #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
94 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
96 /* internally used only, not really from CMOS: */
97 #define RTCFDT_144M_PRETENDED 0x1000
99 /* error returns for fd_cmd() */
101 #define FD_NOT_VALID -2
102 #define FDC_ERRMAX 100 /* do not log more */
104 * Stop retrying after this many DMA overruns. Since each retry takes
105 * one revolution, with 300 rpm., 25 retries take approximately 10
106 * seconds which the read attempt will block in case the DMA overrun
109 #define FDC_DMAOV_MAX 25
112 * Timeout value for the PIO loops to wait until the FDC main status
113 * register matches our expectations (request for master, direction
114 * bit). This is supposed to be a number of microseconds, although
115 * timing might actually not be very accurate.
117 * Timeouts of 100 msec are believed to be required for some broken
120 #define FDSTS_TIMEOUT 100000
123 #define NUMDENS (NUMTYPES - 7)
125 /* These defines (-1) must match index for fd_types */
126 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
127 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */
139 #define FD_1480in5_25 11
140 #define FD_1440in5_25 12
141 #define FD_820in5_25 13
142 #define FD_800in5_25 14
143 #define FD_720in5_25 15
144 #define FD_360in5_25 16
145 #define FD_640in5_25 17
148 static struct fd_type fd_types[NUMTYPES] =
150 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
151 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
152 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
153 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
154 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
155 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
156 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
157 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
158 { 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
159 { 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
161 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
162 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
163 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
164 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
165 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
166 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
167 { 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
170 #define DRVS_PER_CTLR 2 /* 2 floppies */
172 /***********************************************************************\
173 * Per controller structure. *
174 \***********************************************************************/
175 devclass_t fdc_devclass;
177 /***********************************************************************\
178 * Per drive structure. *
179 * N per controller (DRVS_PER_CTLR) *
180 \***********************************************************************/
182 struct fdc_data *fdc; /* pointer to controller structure */
183 int fdsu; /* this units number on this controller */
184 int type; /* Drive type (FD_1440...) */
185 struct fd_type ft; /* the type descriptor */
187 #define FD_OPEN 0x01 /* it's open */
188 #define FD_ACTIVE 0x02 /* it's active */
189 #define FD_MOTOR 0x04 /* motor should be on */
190 #define FD_MOTOR_WAIT 0x08 /* motor coming up */
193 #define FD_NO_TRACK -2
194 int track; /* where we think the head is */
195 int options; /* user configurable options, see ioctl_fd.h */
196 struct callout toffhandle;
197 struct callout tohandle;
198 struct callout motor;
200 struct devstat device_stats;
208 static devclass_t fd_devclass;
210 /***********************************************************************\
211 * Throughout this file the following conventions will be used: *
212 * fd is a pointer to the fd_data struct for the drive in question *
213 * fdc is a pointer to the fdc_data struct for the controller *
214 * fdu is the floppy drive unit number *
215 * fdcu is the floppy controller unit number *
216 * fdsu is the floppy drive unit number on that controller. (sub-unit) *
217 \***********************************************************************/
219 /* internal functions */
220 static void fdc_intr(void *);
221 static void set_motor(struct fdc_data *, int, int);
224 static timeout_t fd_turnoff;
225 static timeout_t fd_motor_on;
226 static void fd_turnon(struct fd_data *);
227 static void fdc_reset(fdc_p);
228 static int fd_in(struct fdc_data *, int *);
229 static int out_fdc(struct fdc_data *, int);
230 static void fdstart(struct fdc_data *);
231 static timeout_t fd_iotimeout;
232 static timeout_t fd_pseudointr;
233 static int fdstate(struct fdc_data *);
234 static int retrier(struct fdc_data *);
235 static int fdformat(cdev_t, struct fd_formb *, struct ucred *);
237 static int enable_fifo(fdc_p fdc);
239 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
245 #define SEEKCOMPLETE 3
247 #define RECALCOMPLETE 5
253 #define IOTIMEDOUT 11
254 #define RESETCOMPLETE 12
258 static char const * const fdstates[] =
276 /* CAUTION: fd_debug causes huge amounts of logging output */
277 static int volatile fd_debug = 0;
278 #define TRACE0(arg) if(fd_debug) kprintf(arg)
279 #define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2)
280 #else /* FDC_DEBUG */
282 #define TRACE1(arg1, arg2)
283 #endif /* FDC_DEBUG */
286 fdout_wr(fdc_p fdc, u_int8_t v)
288 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
294 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
298 fddata_wr(fdc_p fdc, u_int8_t v)
300 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
306 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
310 fdctl_wr_isa(fdc_p fdc, u_int8_t v)
312 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
320 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
325 static d_open_t Fdopen; /* NOTE, not fdopen */
326 static d_close_t fdclose;
327 static d_ioctl_t fdioctl;
328 static d_strategy_t fdstrategy;
330 static struct dev_ops fd_ops = {
331 { "fd", FD_CDEV_MAJOR, D_DISK },
335 .d_write = physwrite,
337 .d_strategy = fdstrategy,
341 fdc_err(struct fdc_data *fdc, const char *s)
345 if (fdc->fdc_errs < FDC_ERRMAX)
346 device_printf(fdc->fdc_dev, "%s", s);
347 else if (fdc->fdc_errs == FDC_ERRMAX)
348 device_printf(fdc->fdc_dev, "too many errors, not "
349 "logging any more\n");
356 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
358 * # of output bytes, output bytes as ints ...,
359 * # of input bytes, input bytes as ints ...
362 fd_cmd(struct fdc_data *fdc, int n_out, ...)
369 __va_start(ap, n_out);
370 cmd = (u_char)(__va_arg(ap, int));
372 __va_start(ap, n_out);
373 for (n = 0; n < n_out; n++)
375 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
378 ksnprintf(msg, sizeof(msg),
379 "cmd %x failed at out byte %d of %d\n",
381 return fdc_err(fdc, msg);
384 n_in = __va_arg(ap, int);
385 for (n = 0; n < n_in; n++)
387 int *ptr = __va_arg(ap, int *);
388 if (fd_in(fdc, ptr) < 0)
391 ksnprintf(msg, sizeof(msg),
392 "cmd %02x failed at in byte %d of %d\n",
394 return fdc_err(fdc, msg);
402 enable_fifo(fdc_p fdc)
406 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
410 * Cannot use fd_cmd the normal way here, since
411 * this might be an invalid command. Thus we send the
412 * first byte, and check for an early turn of data directon.
415 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
416 return fdc_err(fdc, "Enable FIFO failed\n");
418 /* If command is invalid, return */
420 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
421 != NE7_RQM && j-- > 0) {
422 if (i == (NE7_DIO | NE7_RQM)) {
430 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
432 return fdc_err(fdc, "Enable FIFO failed\n");
434 fdc->flags |= FDC_HAS_FIFO;
438 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
439 return fdc_err(fdc, "Re-enable FIFO failed\n");
444 fd_sense_drive_status(fdc_p fdc, int *st3p)
448 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
450 return fdc_err(fdc, "Sense Drive Status failed\n");
459 fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
463 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
466 "sense intr err reading stat reg 0\n");
473 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
475 * There doesn't seem to have been an interrupt.
480 if (fd_in(fdc, &cyl) < 0) {
481 return fdc_err(fdc, "can't get cyl num\n");
492 fd_read_status(fdc_p fdc, int fdsu)
496 for (i = 0; i < 7; i++) {
498 * XXX types are poorly chosen. Only bytes can by read
499 * from the hardware, but fdc->status[] wants u_ints and
500 * fd_in() gives ints.
504 ret = fd_in(fdc, &status);
505 fdc->status[i] = status;
511 fdc->flags |= FDC_STAT_VALID;
513 fdc->flags &= ~FDC_STAT_VALID;
518 /****************************************************************************/
519 /* autoconfiguration stuff */
520 /****************************************************************************/
523 fdc_alloc_resources(struct fdc_data *fdc)
529 ispnp = (fdc->flags & FDC_ISPNP) != 0;
530 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
531 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
532 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
535 * On standard ISA, we don't just use an 8 port range
536 * (e.g. 0x3f0-0x3f7) since that covers an IDE control
539 * Isn't PC hardware wonderful.
541 * The Y-E Data PCMCIA FDC doesn't have this problem, it
542 * uses the register with offset 6 for pseudo-DMA, and the
543 * one with offset 7 as control register.
545 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
546 &fdc->rid_ioport, 0ul, ~0ul,
547 ispcmcia ? 8 : (ispnp ? 1 : 6),
549 if (fdc->res_ioport == 0) {
550 device_printf(dev, "cannot reserve I/O port range\n");
553 fdc->portt = rman_get_bustag(fdc->res_ioport);
554 fdc->porth = rman_get_bushandle(fdc->res_ioport);
558 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
559 * and some at 0x3f0-0x3f5,0x3f7. We detect the former
560 * by checking the size and adjust the port address
563 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
567 * Register the control port range as rid 1 if it
568 * isn't there already. Most PnP BIOSen will have
569 * already done this but non-PnP configurations don't.
571 * And some (!!) report 0x3f2-0x3f5 and completely
572 * leave out the control register! It seems that some
573 * non-antique controller chips have a different
574 * method of programming the transfer speed which
575 * doesn't require the control register, but it's
576 * mighty bogus as the chip still responds to the
577 * address for the control register.
579 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
582 /* Find the control port, usually 0x3f7 */
583 ctlstart = rman_get_start(fdc->res_ioport) +
586 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1,
591 * Now (finally!) allocate the control port.
594 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
596 0ul, ~0ul, 1, RF_ACTIVE);
597 if (fdc->res_ctl == 0) {
599 "cannot reserve control I/O port range\n");
602 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
603 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
606 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
607 &fdc->rid_irq, 0ul, ~0ul, 1,
609 if (fdc->res_irq == 0) {
610 device_printf(dev, "cannot reserve interrupt line\n");
614 if ((fdc->flags & FDC_NODMA) == 0) {
615 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
616 &fdc->rid_drq, 0ul, ~0ul, 1,
618 if (fdc->res_drq == 0) {
619 device_printf(dev, "cannot reserve DMA request line\n");
622 fdc->dmachan = fdc->res_drq->r_start;
629 fdc_release_resources(struct fdc_data *fdc)
634 if (fdc->res_irq != 0) {
635 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
637 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
640 if (fdc->res_ctl != 0) {
641 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
643 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
646 if (fdc->res_ioport != 0) {
647 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
649 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
652 if (fdc->res_drq != 0) {
653 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
655 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
660 /****************************************************************************/
661 /* autoconfiguration stuff */
662 /****************************************************************************/
664 static struct isa_pnp_id fdc_ids[] = {
665 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
666 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
671 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
673 struct fdc_ivars *ivars = device_get_ivars(child);
676 case FDC_IVAR_FDUNIT:
677 *result = ivars->fdunit;
686 * fdc controller section.
689 fdc_probe(device_t dev)
692 struct fdc_data *fdc;
694 fdc = device_get_softc(dev);
695 bzero(fdc, sizeof *fdc);
697 fdc->fdctl_wr = fdctl_wr_isa;
700 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
704 fdc->flags |= FDC_ISPNP;
706 /* Attempt to allocate our resources for the duration of the probe */
707 error = fdc_alloc_resources(fdc);
711 /* First - lets reset the floppy controller */
714 fdout_wr(fdc, FDO_FRST);
716 /* see if it can handle a command */
717 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
718 NE7_SPEC_2(2, 0), 0)) {
723 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
724 ic_type = (u_char)ic_type;
727 device_set_desc(dev, "NEC 765 or clone");
728 fdc->fdct = FDC_NE765;
731 device_set_desc(dev, "Intel 82077 or clone");
732 fdc->fdct = FDC_I82077;
735 device_set_desc(dev, "NEC 72065B or clone");
736 fdc->fdct = FDC_NE72065;
739 device_set_desc(dev, "generic floppy controller");
740 fdc->fdct = FDC_UNKNOWN;
746 fdc_release_resources(fdc);
751 * Add a child device to the fdc controller. It will then be probed etc.
754 fdc_add_child(device_t dev, const char *name, int unit)
757 struct fdc_ivars *ivar;
760 ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
761 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
763 child = device_add_child(dev, name, unit);
766 device_set_ivars(child, ivar);
767 if (resource_int_value(name, unit, "disabled", &disabled) == 0
769 device_disable(child);
773 fdc_attach(device_t dev)
775 struct fdc_data *fdc;
778 fdc = device_get_softc(dev);
780 callout_init(&fdc->pseudointr_ch);
782 error = fdc_alloc_resources(fdc);
784 device_printf(dev, "cannot reacquire resources\n");
787 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
789 &fdc->fdc_intr, NULL);
791 device_printf(dev, "cannot setup interrupt\n");
794 fdc->fdcu = device_get_unit(dev);
795 fdc->flags |= FDC_ATTACHED;
797 if ((fdc->flags & FDC_NODMA) == 0) {
798 /* Acquire the DMA channel forever, The driver will do the rest */
799 /* XXX should integrate with rman */
800 isa_dma_acquire(fdc->dmachan);
801 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
803 fdc->state = DEVIDLE;
805 /* reset controller, turn motor off, clear fdout mirror reg */
806 fdout_wr(fdc, ((fdc->fdout = 0)));
807 bioq_init(&fdc->bio_queue);
810 * Probe and attach any children. We should probably detect
811 * devices from the BIOS unless overridden.
813 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
815 i = resource_query_string(i, "at", device_get_nameunit(dev)))
816 fdc_add_child(dev, resource_query_name(i),
817 resource_query_unit(i));
819 return (bus_generic_attach(dev));
823 fdc_print_child(device_t me, device_t child)
827 retval += bus_print_child_header(me, child);
828 retval += kprintf(" on %s drive %d\n", device_get_nameunit(me),
829 fdc_get_fdunit(child));
834 static device_method_t fdc_methods[] = {
835 /* Device interface */
836 DEVMETHOD(device_probe, fdc_probe),
837 DEVMETHOD(device_attach, fdc_attach),
838 DEVMETHOD(device_detach, bus_generic_detach),
839 DEVMETHOD(device_shutdown, bus_generic_shutdown),
840 DEVMETHOD(device_suspend, bus_generic_suspend),
841 DEVMETHOD(device_resume, bus_generic_resume),
844 DEVMETHOD(bus_print_child, fdc_print_child),
845 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
846 /* Our children never use any other bus interface methods. */
851 static driver_t fdc_driver = {
854 sizeof(struct fdc_data)
857 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, NULL, NULL);
858 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, NULL, NULL);
860 /******************************************************************/
862 * devices attached to the controller section.
865 fd_probe(device_t dev)
870 struct fdc_data *fdc;
872 static int fd_fifo = 0;
874 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
875 fd = device_get_softc(dev);
876 fdc = device_get_softc(device_get_parent(dev));
878 bzero(fd, sizeof *fd);
882 fd->fdu = device_get_unit(dev);
885 /* look up what bios thinks we have */
888 if ((fdc->flags & FDC_ISPCMCIA))
890 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
891 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
893 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
896 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
903 fdt = RTCFDT_144M; /* XXX probably */
906 /* is there a unit? */
907 if (fdt == RTCFDT_NONE)
911 set_motor(fdc, fdsu, TURNON);
912 DELAY(1000000); /* 1 sec */
914 /* XXX This doesn't work before the first set_motor() */
915 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
916 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
917 && enable_fifo(fdc) == 0) {
918 device_printf(device_get_parent(dev),
919 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
923 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
924 && (st3 & NE7_ST3_T0)) {
925 /* if at track 0, first seek inwards */
926 /* seek some steps: */
927 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
928 DELAY(300000); /* ...wait a moment... */
929 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
932 /* If we're at track 0 first seek inwards. */
933 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
934 /* Seek some steps... */
935 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
936 /* ...wait a moment... */
938 /* make ctrlr happy: */
939 fd_sense_int(fdc, 0, 0);
943 for (i = 0; i < 2; i++) {
945 * we must recalibrate twice, just in case the
946 * heads have been beyond cylinder 76, since most
947 * FDCs still barf when attempting to recalibrate
951 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
952 /* a second being enough for full stroke seek*/
953 DELAY(i == 0 ? 1000000 : 300000);
955 /* anything responding? */
956 if (fd_sense_int(fdc, &st0, 0) == 0 &&
957 (st0 & NE7_ST0_EC) == 0)
958 break; /* already probed succesfully */
962 set_motor(fdc, fdsu, TURNOFF);
964 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
967 fd->track = FD_NO_TRACK;
971 callout_init(&fd->toffhandle);
972 callout_init(&fd->tohandle);
973 callout_init(&fd->motor);
977 device_set_desc(dev, "1200-KB 5.25\" drive");
980 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
981 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
985 device_set_desc(dev, "1440-KB 3.5\" drive");
990 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
994 device_set_desc(dev, "360-KB 5.25\" drive");
998 kprintf("720-KB 3.5\" drive");
1004 fd->ft = fd_types[fd->type - 1];
1009 fd_attach(device_t dev)
1011 struct disk_info info;
1015 fd = device_get_softc(dev);
1017 disk_create(fd->fdu, &fd->disk, &fd_ops);
1018 disk_setdisktype(&fd->disk, "floppy");
1021 * Make special raw floppy devices with preset types to
1022 * make formatting easier. These override the disk management
1023 * layer for the whole-slice-disk for partitions 128-191. Note
1024 * that we do not override partition 255, which is the
1025 * whole-slice-part. If we did we would have to provide our
1026 * own DIOCGPART ioctl.
1028 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 1),
1029 UID_ROOT, GID_WHEEL, 0600, "fd%d.1720", fd->fdu);
1030 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 2),
1031 UID_ROOT, GID_WHEEL, 0600, "fd%d.1480", fd->fdu);
1032 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 3),
1033 UID_ROOT, GID_WHEEL, 0600, "fd%d.1440", fd->fdu);
1034 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 4),
1035 UID_ROOT, GID_WHEEL, 0600, "fd%d.1200", fd->fdu);
1036 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 5),
1037 UID_ROOT, GID_WHEEL, 0600, "fd%d.820", fd->fdu);
1038 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 6),
1039 UID_ROOT, GID_WHEEL, 0600, "fd%d.800", fd->fdu);
1040 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 7),
1041 UID_ROOT, GID_WHEEL, 0600, "fd%d.720", fd->fdu);
1042 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 8),
1043 UID_ROOT, GID_WHEEL, 0600, "fd%d.360", fd->fdu);
1044 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 9),
1045 UID_ROOT, GID_WHEEL, 0600, "fd%d.640", fd->fdu);
1046 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 10),
1047 UID_ROOT, GID_WHEEL, 0600, "fd%d.1232", fd->fdu);
1049 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1050 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1051 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1052 DEVSTAT_PRIORITY_FD);
1054 if (fd->type != NO_TYPE) {
1055 bzero(&info, sizeof(info));
1056 ft = &fd_types[fd->type - 1];
1057 info.d_media_blksize = 128 << ft->secsize;
1058 info.d_media_blocks = ft->size;
1059 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1060 info.d_nheads = ft->heads;
1061 info.d_secpertrack = ft->sectrac;
1062 info.d_secpercyl = ft->sectrac * ft->heads;
1063 info.d_ncylinders = ft->size / info.d_secpercyl;
1064 disk_setdiskinfo(&fd->disk, &info);
1070 fd_detach(device_t dev)
1074 fd = device_get_softc(dev);
1075 kprintf("devfs: Please make sure that only the right fd device was removed!!!\n");
1076 dev_ops_remove_minor(&fd_ops,
1077 /*dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),*/
1078 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128));
1079 disk_invalidate(&fd->disk);
1080 disk_destroy(&fd->disk);
1081 devstat_remove_entry(&fd->device_stats);
1082 callout_stop(&fd->toffhandle);
1083 callout_stop(&fd->motor);
1088 static device_method_t fd_methods[] = {
1089 /* Device interface */
1090 DEVMETHOD(device_probe, fd_probe),
1091 DEVMETHOD(device_attach, fd_attach),
1092 DEVMETHOD(device_detach, fd_detach),
1093 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1094 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1095 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1100 static driver_t fd_driver = {
1103 sizeof(struct fd_data)
1106 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, NULL, NULL);
1108 /****************************************************************************/
1109 /* motor control stuff */
1110 /* remember to not deselect the drive we're working on */
1111 /****************************************************************************/
1113 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1115 int fdout = fdc->fdout;
1116 int needspecify = 0;
1119 fdout &= ~FDO_FDSEL;
1120 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1122 fdout &= ~(FDO_MOEN0 << fdsu);
1125 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1126 /* gonna turn off the last drive, put FDC to bed */
1127 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1129 /* make sure controller is selected and specified */
1130 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1132 fdout |= (FDO_FRST|FDO_FDMAEN);
1135 fdout_wr(fdc, fdout);
1137 TRACE1("[0x%x->FDOUT]", fdout);
1142 * special case: since we have just woken up the FDC
1143 * from its sleep, we silently assume the command will
1144 * be accepted, and do not test for a timeout
1146 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1147 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1149 if (fdc->flags & FDC_HAS_FIFO)
1150 (void) enable_fifo(fdc);
1155 fd_turnoff(void *xfd)
1159 TRACE1("[fd%d: turnoff]", fd->fdu);
1163 * Don't turn off the motor yet if the drive is active.
1165 * If we got here, this could only mean we missed an interrupt.
1166 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1167 * after a controller reset. Just schedule a pseudo-interrupt
1168 * so the state machine gets re-entered.
1170 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1176 fd->flags &= ~FD_MOTOR;
1177 set_motor(fd->fdc, fd->fdsu, TURNOFF);
1182 fd_motor_on(void *xfd)
1187 fd->flags &= ~FD_MOTOR_WAIT;
1188 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1198 if(!(fd->flags & FD_MOTOR))
1200 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1201 set_motor(fd->fdc, fd->fdsu, TURNON);
1202 callout_reset(&fd->motor, hz, fd_motor_on, fd);
1207 fdc_reset(fdc_p fdc)
1209 /* Try a reset, keep motor on */
1210 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1211 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1213 /* enable FDC, but defer interrupts a moment */
1214 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1215 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1217 fdout_wr(fdc, fdc->fdout);
1218 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1220 /* XXX after a reset, silently believe the FDC will accept commands */
1221 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1222 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1224 if (fdc->flags & FDC_HAS_FIFO)
1225 (void) enable_fifo(fdc);
1228 /****************************************************************************/
1230 /****************************************************************************/
1232 * FDC IO functions, take care of the main status register, timeout
1233 * in case the desired status bits are never set.
1235 * These PIO loops initially start out with short delays between
1236 * each iteration in the expectation that the required condition
1237 * is usually met quickly, so it can be handled immediately. After
1238 * about 1 ms, stepping is increased to achieve a better timing
1239 * accuracy in the calls to DELAY().
1242 fd_in(struct fdc_data *fdc, int *ptr)
1246 for (j = 0, step = 1;
1247 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1251 return (fdc_err(fdc, "ready for output in input\n"));
1256 if (j >= FDSTS_TIMEOUT)
1257 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1260 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1263 #else /* !FDC_DEBUG */
1268 #endif /* FDC_DEBUG */
1272 out_fdc(struct fdc_data *fdc, int x)
1276 for (j = 0, step = 1;
1277 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1280 if (i == (NE7_DIO|NE7_RQM))
1281 return (fdc_err(fdc, "ready for input in output\n"));
1286 if (j >= FDSTS_TIMEOUT)
1287 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1289 /* Send the command and return */
1291 TRACE1("[0x%x->FDDATA]", x);
1295 /****************************************************************************/
1296 /* fdopen/fdclose */
1297 /****************************************************************************/
1299 Fdopen(struct dev_open_args *ap)
1301 cdev_t dev = ap->a_head.a_dev;
1302 fdu_t fdu = dkunit(dev);
1303 struct disk_info info;
1311 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1314 if ((fdc == NULL) || (fd->type == NO_TYPE))
1318 * Figure out the type of floppy. There are special whole-disk-device
1319 * overrides that will override the current type.
1322 if (type == WHOLE_SLICE_PART) {
1323 type = fd->type; /* do not change selected type data */
1325 } else if (type > 128) {
1326 type -= 128; /* set to specific format */
1329 type = fd->type; /* reset to default */
1334 if (type != fd->type) {
1336 * For each type of basic drive, make sure we are trying
1337 * to open a type it can do,
1352 type = FD_1480in5_25;
1355 type = FD_1440in5_25;
1360 type = FD_820in5_25;
1363 type = FD_800in5_25;
1366 type = FD_720in5_25;
1369 type = FD_640in5_25;
1372 type = FD_360in5_25;
1379 if ( type != FD_1720
1393 * fd->type is the basic drive type, not the current format
1394 * we are reading. We only change the type when opening the
1395 * whole-slice-partition
1398 fd->ft = fd_types[type - 1];
1399 fd->flags |= FD_OPEN;
1402 * Clearing the DMA overrun counter at open time is a bit messy.
1403 * Since we're only managing one counter per controller, opening
1404 * the second drive could mess it up. Anyway, if the DMA overrun
1405 * condition is really persistent, it will eventually time out
1406 * still. OTOH, clearing it here will ensure we'll at least start
1407 * trying again after a previous (maybe even long ago) failure.
1408 * Also, this is merely a stop-gap measure only that should not
1409 * happen during normal operation, so we can tolerate it to be a
1410 * bit sloppy about this.
1412 fdc->dma_overruns = 0;
1415 * Set disk parameters for the disk management layer.
1417 * Note that we do not set RAWEXTENSIONS here. We override
1418 * the minor numbers in the raw-extension range and handle them
1421 bzero(&info, sizeof(info));
1423 info.d_media_blksize = 128 << ft->secsize;
1424 info.d_media_blocks = ft->size;
1425 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1426 info.d_nheads = ft->heads;
1427 info.d_secpertrack = ft->sectrac;
1428 info.d_secpercyl = ft->sectrac * ft->heads;
1429 info.d_ncylinders = ft->size / info.d_secpercyl;
1430 disk_setdiskinfo(&fd->disk, &info);
1436 fdclose(struct dev_close_args *ap)
1438 cdev_t dev = ap->a_head.a_dev;
1439 fdu_t fdu = dkunit(dev);
1442 fd = devclass_get_softc(fd_devclass, fdu);
1443 fd->flags &= ~FD_OPEN;
1444 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1449 /****************************************************************************/
1451 /****************************************************************************/
1453 fdstrategy(struct dev_strategy_args *ap)
1455 cdev_t dev = ap->a_head.a_dev;
1456 struct bio *bio = ap->a_bio;
1457 struct buf *bp = bio->bio_buf;
1458 unsigned nblocks, blknum, cando;
1465 fd = devclass_get_softc(fd_devclass, fdu);
1467 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1468 (u_long)major(dev), (u_long)minor(dev));
1470 if (fd->type == NO_TYPE) {
1471 bp->b_error = ENXIO;
1472 bp->b_flags |= B_ERROR;
1476 fdblk = 128 << (fd->ft.secsize);
1477 if (bp->b_cmd != BUF_CMD_FORMAT) {
1478 if (bio->bio_offset < 0) {
1480 "fd%d: fdstrat: bad request offset = %"PRId64", bcount = %d\n",
1481 fdu, bio->bio_offset, bp->b_bcount);
1482 bp->b_error = EINVAL;
1483 bp->b_flags |= B_ERROR;
1486 if ((bp->b_bcount % fdblk) != 0) {
1487 bp->b_error = EINVAL;
1488 bp->b_flags |= B_ERROR;
1494 * Set up block calculations.
1496 if (bio->bio_offset > 20000000LL * fdblk) {
1498 * Reject unreasonably high block number, prevent the
1499 * multiplication below from overflowing.
1501 bp->b_error = EINVAL;
1502 bp->b_flags |= B_ERROR;
1505 blknum = (unsigned)(bio->bio_offset / fdblk);
1506 nblocks = fd->ft.size;
1508 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1509 if (blknum <= nblocks) {
1510 cando = (nblocks - blknum) * fdblk;
1511 bp->b_resid = bp->b_bcount - cando;
1513 goto bad; /* not actually bad but EOF */
1515 bp->b_error = EINVAL;
1516 bp->b_flags |= B_ERROR;
1521 bio->bio_driver_info = dev;
1522 bioqdisksort(&fdc->bio_queue, bio);
1523 callout_stop(&fd->toffhandle);
1525 /* Tell devstat we are starting on the transaction */
1526 devstat_start_transaction(&fd->device_stats);
1528 device_busy(fd->dev);
1539 /***************************************************************\
1541 * We have just queued something.. if the controller is not busy *
1542 * then simulate the case where it has just finished a command *
1543 * So that it (the interrupt routine) looks on the queue for more*
1544 * work to do and picks up what we just added. *
1545 * If the controller is already busy, we need do nothing, as it *
1546 * will pick up our work when the present work completes *
1547 \***************************************************************/
1549 fdstart(struct fdc_data *fdc)
1552 if(fdc->state == DEVIDLE)
1560 fd_iotimeout(void *xfdc)
1565 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1568 * Due to IBM's brain-dead design, the FDC has a faked ready
1569 * signal, hardwired to ready == true. Thus, any command
1570 * issued if there's no diskette in the drive will _never_
1571 * complete, and must be aborted by resetting the FDC.
1572 * Many thanks, Big Blue!
1573 * The FDC must not be reset directly, since that would
1574 * interfere with the state machine. Instead, pretend that
1575 * the command completed but was invalid. The state machine
1576 * will reset the FDC and retry once.
1579 fdc->status[0] = NE7_ST0_IC_IV;
1580 fdc->flags &= ~FDC_STAT_VALID;
1581 fdc->state = IOTIMEDOUT;
1586 /* just ensure it is running in a critical section */
1588 fd_pseudointr(void *xfdc)
1595 /***********************************************************************\
1597 * keep calling the state machine until it returns a 0 *
1598 * ALWAYS called at SPLBIO *
1599 \***********************************************************************/
1601 fdc_intr(void *xfdc)
1609 * magic pseudo-DMA initialization for YE FDC. Sets count and
1612 #define SET_BCDR(fdc,wr,cnt,port) \
1613 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1614 ((cnt)-1) & 0xff); \
1615 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1616 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1619 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1621 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
1623 u_char *cptr = (u_char *)addr;
1625 if (cmd == BUF_CMD_READ) {
1626 if (fdc->state != PIOREAD) {
1627 fdc->state = PIOREAD;
1630 SET_BCDR(fdc, 0, count, 0);
1631 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1632 FDC_YE_DATAPORT, cptr, count);
1634 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1635 FDC_YE_DATAPORT, cptr, count);
1636 SET_BCDR(fdc, 0, count, 0);
1641 /***********************************************************************\
1642 * The controller state machine. *
1643 * if it returns a non zero value, it should be called again immediatly *
1644 \***********************************************************************/
1648 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1649 unsigned blknum = 0, b_cylinder = 0;
1654 struct fd_formb *finfo = NULL;
1660 bio = bioq_first(&fdc->bio_queue);
1662 bioq_remove(&fdc->bio_queue, bio);
1667 /***********************************************\
1668 * nothing left for this controller to do *
1669 * Force into the IDLE state, *
1670 \***********************************************/
1671 fdc->state = DEVIDLE;
1673 device_printf(fdc->fdc_dev,
1674 "unexpected valid fd pointer\n");
1678 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1682 dev = bio->bio_driver_info;
1685 fd = devclass_get_softc(fd_devclass, fdu);
1686 fdblk = 128 << fd->ft.secsize;
1687 if (fdc->fd && (fd != fdc->fd))
1688 device_printf(fd->dev, "confused fd pointers\n");
1689 read = (bp->b_cmd == BUF_CMD_READ);
1690 format = (bp->b_cmd == BUF_CMD_FORMAT);
1692 finfo = (struct fd_formb *)bp->b_data;
1693 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1696 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1697 blknum = (unsigned)(bio->bio_offset / fdblk) +
1699 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads);
1701 TRACE1("fd%d", fdu);
1702 TRACE1("[%s]", fdstates[fdc->state]);
1703 TRACE1("(0x%x)", fd->flags);
1704 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
1708 case FINDWORK: /* we have found new work */
1713 fdc->fdctl_wr(fdc, fd->ft.trans);
1714 TRACE1("[0x%x->FDCTL]", fd->ft.trans);
1715 /*******************************************************\
1716 * If the next drive has a motor startup pending, then *
1717 * it will start up in its own good time *
1718 \*******************************************************/
1719 if(fd->flags & FD_MOTOR_WAIT) {
1720 fdc->state = MOTORWAIT;
1721 return (0); /* come back later */
1723 /*******************************************************\
1724 * Maybe if it's not starting, it SHOULD be starting *
1725 \*******************************************************/
1726 if (!(fd->flags & FD_MOTOR))
1728 fdc->state = MOTORWAIT;
1732 else /* at least make sure we are selected */
1734 set_motor(fdc, fd->fdsu, TURNON);
1736 if (fdc->flags & FDC_NEEDS_RESET) {
1737 fdc->state = RESETCTLR;
1738 fdc->flags &= ~FDC_NEEDS_RESET;
1740 fdc->state = DOSEEK;
1743 if (b_cylinder == (unsigned)fd->track)
1745 fdc->state = SEEKCOMPLETE;
1748 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1749 fd->fdsu, b_cylinder * fd->ft.steptrac,
1753 * seek command not accepted, looks like
1754 * the FDC went off to the Saints...
1756 fdc->retry = 6; /* try a reset */
1757 return(retrier(fdc));
1759 fd->track = FD_NO_TRACK;
1760 fdc->state = SEEKWAIT;
1761 return(0); /* will return later */
1763 /* allow heads to settle */
1764 callout_reset(&fdc->pseudointr_ch, hz / 16,
1765 fd_pseudointr, fdc);
1766 fdc->state = SEEKCOMPLETE;
1767 return(0); /* will return later */
1768 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1769 /* Make sure seek really happened*/
1770 if(fd->track == FD_NO_TRACK) {
1771 int descyl = b_cylinder * fd->ft.steptrac;
1774 * This might be a "ready changed" interrupt,
1775 * which cannot really happen since the
1776 * RDY pin is hardwired to + 5 volts. This
1777 * generally indicates a "bouncing" intr
1778 * line, so do one of the following:
1780 * When running on an enhanced FDC that is
1781 * known to not go stuck after responding
1782 * with INVALID, fetch all interrupt states
1783 * until seeing either an INVALID or a
1784 * real interrupt condition.
1786 * When running on a dumb old NE765, give
1787 * up immediately. The controller will
1788 * provide up to four dummy RC interrupt
1789 * conditions right after reset (for the
1790 * corresponding four drives), so this is
1791 * our only chance to get notice that it
1792 * was not the FDC that caused the interrupt.
1794 if (fd_sense_int(fdc, &st0, &cyl)
1797 if(fdc->fdct == FDC_NE765
1798 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1799 return 0; /* hope for a real intr */
1800 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1805 * seek to cyl 0 requested; make sure we are
1808 if (fd_sense_drive_status(fdc, &st3))
1810 if ((st3 & NE7_ST3_T0) == 0) {
1812 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1813 fdu, st3, NE7_ST3BITS);
1820 return (retrier(fdc));
1824 if (cyl != descyl) {
1826 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1827 fdu, descyl, cyl, st0);
1830 return (retrier(fdc));
1834 fd->track = b_cylinder;
1835 if (!(fdc->flags & FDC_NODMA)) {
1836 isa_dmastart(isa_dmabp(bp),
1837 bp->b_data+fd->skip,
1838 format ? bp->b_bcount : fdblk, fdc->dmachan);
1840 sectrac = fd->ft.sectrac;
1841 sec = blknum % (sectrac * fd->ft.heads);
1842 head = sec / sectrac;
1843 sec = sec % sectrac + 1;
1844 fd->hddrv = ((head&1)<<2)+fdu;
1848 /* make sure the drive is writable */
1849 if(fd_sense_drive_status(fdc, &st3) != 0)
1851 /* stuck controller? */
1852 if (!(fdc->flags & FDC_NODMA))
1853 isa_dmadone(isa_dmabp(bp),
1854 bp->b_data + fd->skip,
1855 format ? bp->b_bcount : fdblk,
1857 fdc->retry = 6; /* reset the beast */
1858 return (retrier(fdc));
1860 if(st3 & NE7_ST3_WP)
1863 * XXX YES! this is ugly.
1864 * in order to force the current operation
1865 * to fail, we will have to fake an FDC
1866 * error - all error handling is done
1869 fdc->status[0] = NE7_ST0_IC_AT;
1870 fdc->status[1] = NE7_ST1_NW;
1872 fdc->status[3] = fd->track;
1873 fdc->status[4] = head;
1874 fdc->status[5] = sec;
1875 fdc->retry = 8; /* break out immediately */
1876 fdc->state = IOTIMEDOUT; /* not really... */
1882 if (fdc->flags & FDC_NODMA) {
1884 * This seems to be necessary for
1885 * whatever obscure reason; if we omit
1886 * it, we end up filling the sector ID
1887 * fields of the newly formatted track
1888 * entirely with garbage, causing
1889 * `wrong cylinder' errors all over
1890 * the place when trying to read them
1895 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1897 (void)fdcpio(fdc,bp->b_cmd,
1898 bp->b_data+fd->skip,
1903 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1904 finfo->fd_formb_secshift,
1905 finfo->fd_formb_nsecs,
1906 finfo->fd_formb_gaplen,
1907 finfo->fd_formb_fillbyte, 0)) {
1908 /* controller fell over */
1909 if (!(fdc->flags & FDC_NODMA))
1910 isa_dmadone(isa_dmabp(bp),
1911 bp->b_data + fd->skip,
1912 format ? bp->b_bcount : fdblk,
1915 return (retrier(fdc));
1918 if (fdc->flags & FDC_NODMA) {
1920 * this seems to be necessary even when
1923 SET_BCDR(fdc, 1, fdblk, 0);
1926 * perform the write pseudo-DMA before
1927 * the WRITE command is sent
1930 (void)fdcpio(fdc,bp->b_cmd,
1931 bp->b_data+fd->skip,
1935 (read ? NE7CMD_READ : NE7CMD_WRITE),
1936 head << 2 | fdu, /* head & unit */
1937 fd->track, /* track */
1939 sec, /* sector + 1 */
1940 fd->ft.secsize, /* sector size */
1941 sectrac, /* sectors/track */
1942 fd->ft.gap, /* gap size */
1943 fd->ft.datalen, /* data length */
1945 /* the beast is sleeping again */
1946 if (!(fdc->flags & FDC_NODMA))
1947 isa_dmadone(isa_dmabp(bp),
1948 bp->b_data + fd->skip,
1949 format ? bp->b_bcount : fdblk,
1952 return (retrier(fdc));
1955 if (fdc->flags & FDC_NODMA)
1957 * if this is a read, then simply await interrupt
1958 * before performing PIO
1960 if (read && !fdcpio(fdc,bp->b_cmd,
1961 bp->b_data+fd->skip,fdblk)) {
1962 callout_reset(&fd->tohandle, hz,
1964 return(0); /* will return later */
1968 * write (or format) operation will fall through and
1969 * await completion interrupt
1971 fdc->state = IOCOMPLETE;
1972 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
1973 return (0); /* will return later */
1976 * actually perform the PIO read. The IOCOMPLETE case
1977 * removes the timeout for us.
1979 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
1980 fdc->state = IOCOMPLETE;
1982 case IOCOMPLETE: /* IO DONE, post-analyze */
1983 callout_stop(&fd->tohandle);
1985 if (fd_read_status(fdc, fd->fdsu)) {
1986 if (!(fdc->flags & FDC_NODMA)) {
1987 isa_dmadone(isa_dmabp(bp),
1988 bp->b_data + fd->skip,
1989 format ? bp->b_bcount : fdblk,
1993 fdc->retry = 6; /* force a reset */
1994 return (retrier(fdc));
1997 fdc->state = IOTIMEDOUT;
2002 if (!(fdc->flags & FDC_NODMA)) {
2003 isa_dmadone(isa_dmabp(bp),
2004 bp->b_data + fd->skip,
2005 format ? bp->b_bcount : fdblk, fdc->dmachan);
2007 if (fdc->status[0] & NE7_ST0_IC) {
2008 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2009 && fdc->status[1] & NE7_ST1_OR) {
2011 * DMA overrun. Someone hogged the bus and
2012 * didn't release it in time for the next
2015 * We normally restart this without bumping
2016 * the retry counter. However, in case
2017 * something is seriously messed up (like
2018 * broken hardware), we rather limit the
2019 * number of retries so the IO operation
2020 * doesn't block indefinately.
2022 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
2023 fdc->state = SEEKCOMPLETE;
2025 } /* else fall through */
2027 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
2029 fdc->retry = 6; /* force a reset */
2030 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2031 && fdc->status[2] & NE7_ST2_WC
2033 fdc->retry = 3; /* force recalibrate */
2034 return (retrier(fdc));
2037 /* Operation successful, retry DMA overruns again next time. */
2038 fdc->dma_overruns = 0;
2040 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
2041 /* set up next transfer */
2042 fdc->state = DOSEEK;
2048 device_unbusy(fd->dev);
2050 devstat_end_transaction_buf(&fd->device_stats, bp);
2054 fdc->state = FINDWORK;
2060 fdc->state = RESETCOMPLETE;
2064 * Discard all the results from the reset so that they
2065 * can't cause an unexpected interrupt later.
2067 for (i = 0; i < 4; i++)
2068 (void)fd_sense_int(fdc, &st0, &cyl);
2069 fdc->state = STARTRECAL;
2072 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
2075 return (retrier(fdc));
2077 fdc->state = RECALWAIT;
2078 return (0); /* will return later */
2080 /* allow heads to settle */
2081 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
2082 fdc->state = RECALCOMPLETE;
2083 return (0); /* will return later */
2087 * See SEEKCOMPLETE for a comment on this:
2089 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2091 if(fdc->fdct == FDC_NE765
2092 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2093 return 0; /* hope for a real intr */
2094 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2095 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2099 * a recalibrate from beyond cylinder 77
2100 * will "fail" due to the FDC limitations;
2101 * since people used to complain much about
2102 * the failure message, try not logging
2103 * this one if it seems to be the first
2106 kprintf("fd%d: recal failed ST0 %b cyl %d\n",
2107 fdu, st0, NE7_ST0BITS, cyl);
2108 if(fdc->retry < 3) fdc->retry = 3;
2109 return (retrier(fdc));
2112 /* Seek (probably) necessary */
2113 fdc->state = DOSEEK;
2114 return (1); /* will return immediatly */
2116 if(fd->flags & FD_MOTOR_WAIT)
2118 return (0); /* time's not up yet */
2120 if (fdc->flags & FDC_NEEDS_RESET) {
2121 fdc->state = RESETCTLR;
2122 fdc->flags &= ~FDC_NEEDS_RESET;
2125 * If all motors were off, then the controller was
2126 * reset, so it has lost track of the current
2127 * cylinder. Recalibrate to handle this case.
2128 * But first, discard the results of the reset.
2130 fdc->state = RESETCOMPLETE;
2132 return (1); /* will return immediatly */
2134 device_printf(fdc->fdc_dev, "unexpected FD int->");
2135 if (fd_read_status(fdc, fd->fdsu) == 0)
2136 kprintf("FDC status :%x %x %x %x %x %x %x ",
2145 kprintf("No status available ");
2146 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2148 kprintf("[controller is dead now]\n");
2151 kprintf("ST0 = %x, PCN = %x\n", st0, cyl);
2154 /*XXX confusing: some branches return immediately, others end up here*/
2155 return (1); /* Come back immediatly to new state */
2159 retrier(struct fdc_data *fdc)
2169 dev = bio->bio_driver_info;
2171 /* XXX shouldn't this be cached somewhere? */
2173 fd = devclass_get_softc(fd_devclass, fdu);
2174 if (fd->options & FDOPT_NORETRY)
2177 switch (fdc->retry) {
2178 case 0: case 1: case 2:
2179 fdc->state = SEEKCOMPLETE;
2181 case 3: case 4: case 5:
2182 fdc->state = STARTRECAL;
2185 fdc->state = RESETCTLR;
2192 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2196 * note: use the correct device for more
2197 * verbose error reporting.
2200 "hard error", LOG_PRINTF,
2204 if (fdc->flags & FDC_STAT_VALID)
2206 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2207 fdc->status[0], NE7_ST0BITS,
2208 fdc->status[1], NE7_ST1BITS,
2209 fdc->status[2], NE7_ST2BITS,
2210 fdc->status[3], fdc->status[4],
2213 kprintf(" (No status)\n");
2216 bp->b_flags |= B_ERROR;
2218 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2222 device_unbusy(fd->dev);
2224 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2226 fdc->state = FINDWORK;
2227 fdc->flags |= FDC_NEEDS_RESET;
2237 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred)
2246 fd = devclass_get_softc(fd_devclass, fdu);
2247 fdblk = 128 << fd->ft.secsize;
2249 /* set up a buffer header for fdstrategy() */
2251 bp->b_cmd = BUF_CMD_FORMAT;
2254 * calculate a fake blkno, so fdstrategy() would initiate a
2255 * seek to the requested cylinder
2257 bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
2258 (fd->ft.sectrac * fd->ft.heads)
2259 + finfo->head * fd->ft.sectrac) * fdblk;
2260 bp->b_bio1.bio_driver_info = dev;
2261 bp->b_bio1.bio_flags |= BIO_SYNC;
2262 bp->b_bio1.bio_done = biodone_sync;
2264 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2265 bp->b_data = (caddr_t)finfo;
2267 /* now do the format */
2268 dev_dstrategy(dev, &bp->b_bio1);
2270 /* ...and wait for it to complete */
2271 rv = biowait_timeout(&bp->b_bio1, "fdform", 20 * hz);
2272 if (rv == EWOULDBLOCK) {
2276 device_unbusy(fd->dev);
2278 biodone(&bp->b_bio1);
2280 if (bp->b_flags & B_ERROR)
2283 * allow the process to be swapped
2290 * TODO: don't allocate buffer on stack.
2294 fdioctl(struct dev_ioctl_args *ap)
2296 cdev_t dev = ap->a_head.a_dev;
2297 fdu_t fdu = dkunit(dev);
2298 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2299 struct fdc_status *fsp;
2302 switch (ap->a_cmd) {
2304 if ((ap->a_fflag & FWRITE) == 0)
2305 error = EBADF; /* must be opened for writing */
2306 else if (((struct fd_formb *)ap->a_data)->format_version !=
2308 error = EINVAL; /* wrong version of formatting prog */
2310 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred);
2313 case FD_GTYPE: /* get drive type */
2314 *(struct fd_type *)ap->a_data = fd->ft;
2317 case FD_STYPE: /* set drive type */
2318 /* this is considered harmful; only allow for superuser */
2319 if (priv_check_cred(ap->a_cred, PRIV_ROOT, 0) != 0)
2321 fd->ft = *(struct fd_type *)ap->a_data;
2324 case FD_GOPTS: /* get drive options */
2325 *(int *)ap->a_data = fd->options;
2328 case FD_SOPTS: /* set drive options */
2329 fd->options = *(int *)ap->a_data;
2333 fsp = (struct fdc_status *)ap->a_data;
2334 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2336 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2347 * Hello emacs, these are the
2350 * c-continued-statement-offset: 8
2351 * c-continued-brace-offset: 0
2352 * c-brace-offset: -8
2353 * c-brace-imaginary-offset: 0
2354 * c-argdecl-indent: 8
2355 * c-label-offset: -8
2356 * c++-hanging-braces: 1
2357 * c++-access-specifier-offset: -8
2358 * c++-empty-arglist-indent: 8
2359 * c++-friend-offset: 0