2 * Copyright (c) 1990 The Regents of the University of California.
5 * This code is derived from software contributed to Berkeley by
8 * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu)
9 * aided by the Linux floppy driver modifications from David Bateman
10 * (dbateman@eng.uts.edu.au).
12 * Copyright (c) 1993, 1994 by
13 * jc@irbs.UUCP (John Capo)
14 * vak@zebub.msk.su (Serge Vakulenko)
15 * ache@astral.msk.su (Andrew A. Chernov)
17 * Copyright (c) 1993, 1994, 1995 by
18 * joerg_wunsch@uriah.sax.de (Joerg Wunsch)
19 * dufault@hda.com (Peter Dufault)
21 * Copyright (c) 2001 Joerg Wunsch,
22 * joerg_wunsch@uriah.sax.de (Joerg Wunsch)
24 * Redistribution and use in source and binary forms, with or without
25 * modification, are permitted provided that the following conditions
27 * 1. Redistributions of source code must retain the above copyright
28 * notice, this list of conditions and the following disclaimer.
29 * 2. Redistributions in binary form must reproduce the above copyright
30 * notice, this list of conditions and the following disclaimer in the
31 * documentation and/or other materials provided with the distribution.
32 * 3. All advertising materials mentioning features or use of this software
33 * must display the following acknowledgement:
34 * This product includes software developed by the University of
35 * California, Berkeley and its contributors.
36 * 4. Neither the name of the University nor the names of its contributors
37 * may be used to endorse or promote products derived from this software
38 * without specific prior written permission.
40 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * from: @(#)fd.c 7.4 (Berkeley) 5/25/91
53 * $FreeBSD: src/sys/isa/fd.c,v 1.176.2.8 2002/05/15 21:56:14 joerg Exp $
54 * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.43 2008/08/13 08:18:09 swildner Exp $
59 #include "use_pccard.h"
61 #include <sys/param.h>
62 #include <sys/systm.h>
63 #include <sys/bootmaj.h>
64 #include <sys/kernel.h>
68 #include <sys/diskslice.h>
70 #include <sys/devicestat.h>
71 #include <sys/fcntl.h>
72 #include <sys/malloc.h>
73 #include <sys/module.h>
75 #include <sys/syslog.h>
76 #include <sys/device.h>
80 #include <sys/thread2.h>
82 #include <machine/clock.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);
590 * Now (finally!) allocate the control port.
593 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
595 0ul, ~0ul, 1, RF_ACTIVE);
596 if (fdc->res_ctl == 0) {
598 "cannot reserve control I/O port range\n");
601 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
602 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
605 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
606 &fdc->rid_irq, 0ul, ~0ul, 1,
608 if (fdc->res_irq == 0) {
609 device_printf(dev, "cannot reserve interrupt line\n");
613 if ((fdc->flags & FDC_NODMA) == 0) {
614 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
615 &fdc->rid_drq, 0ul, ~0ul, 1,
617 if (fdc->res_drq == 0) {
618 device_printf(dev, "cannot reserve DMA request line\n");
621 fdc->dmachan = fdc->res_drq->r_start;
628 fdc_release_resources(struct fdc_data *fdc)
633 if (fdc->res_irq != 0) {
634 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
636 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
639 if (fdc->res_ctl != 0) {
640 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
642 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
645 if (fdc->res_ioport != 0) {
646 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
648 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
651 if (fdc->res_drq != 0) {
652 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
654 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
659 /****************************************************************************/
660 /* autoconfiguration stuff */
661 /****************************************************************************/
663 static struct isa_pnp_id fdc_ids[] = {
664 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
665 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
670 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
672 struct fdc_ivars *ivars = device_get_ivars(child);
675 case FDC_IVAR_FDUNIT:
676 *result = ivars->fdunit;
685 * fdc controller section.
688 fdc_probe(device_t dev)
691 struct fdc_data *fdc;
693 fdc = device_get_softc(dev);
694 bzero(fdc, sizeof *fdc);
696 fdc->fdctl_wr = fdctl_wr_isa;
699 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
703 fdc->flags |= FDC_ISPNP;
705 /* Attempt to allocate our resources for the duration of the probe */
706 error = fdc_alloc_resources(fdc);
710 /* First - lets reset the floppy controller */
713 fdout_wr(fdc, FDO_FRST);
715 /* see if it can handle a command */
716 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
717 NE7_SPEC_2(2, 0), 0)) {
722 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
723 ic_type = (u_char)ic_type;
726 device_set_desc(dev, "NEC 765 or clone");
727 fdc->fdct = FDC_NE765;
730 device_set_desc(dev, "Intel 82077 or clone");
731 fdc->fdct = FDC_I82077;
734 device_set_desc(dev, "NEC 72065B or clone");
735 fdc->fdct = FDC_NE72065;
738 device_set_desc(dev, "generic floppy controller");
739 fdc->fdct = FDC_UNKNOWN;
745 fdc_release_resources(fdc);
750 * Add a child device to the fdc controller. It will then be probed etc.
753 fdc_add_child(device_t dev, const char *name, int unit)
756 struct fdc_ivars *ivar;
759 ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
760 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
762 child = device_add_child(dev, name, unit);
765 device_set_ivars(child, ivar);
766 if (resource_int_value(name, unit, "disabled", &disabled) == 0
768 device_disable(child);
772 fdc_attach(device_t dev)
774 struct fdc_data *fdc;
777 fdc = device_get_softc(dev);
779 callout_init(&fdc->pseudointr_ch);
781 error = fdc_alloc_resources(fdc);
783 device_printf(dev, "cannot reacquire resources\n");
786 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
788 &fdc->fdc_intr, NULL);
790 device_printf(dev, "cannot setup interrupt\n");
793 fdc->fdcu = device_get_unit(dev);
794 fdc->flags |= FDC_ATTACHED;
796 if ((fdc->flags & FDC_NODMA) == 0) {
797 /* Acquire the DMA channel forever, The driver will do the rest */
798 /* XXX should integrate with rman */
799 isa_dma_acquire(fdc->dmachan);
800 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
802 fdc->state = DEVIDLE;
804 /* reset controller, turn motor off, clear fdout mirror reg */
805 fdout_wr(fdc, ((fdc->fdout = 0)));
806 bioq_init(&fdc->bio_queue);
809 * Probe and attach any children. We should probably detect
810 * devices from the BIOS unless overridden.
812 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
814 i = resource_query_string(i, "at", device_get_nameunit(dev)))
815 fdc_add_child(dev, resource_query_name(i),
816 resource_query_unit(i));
818 return (bus_generic_attach(dev));
822 fdc_print_child(device_t me, device_t child)
826 retval += bus_print_child_header(me, child);
827 retval += kprintf(" on %s drive %d\n", device_get_nameunit(me),
828 fdc_get_fdunit(child));
833 static device_method_t fdc_methods[] = {
834 /* Device interface */
835 DEVMETHOD(device_probe, fdc_probe),
836 DEVMETHOD(device_attach, fdc_attach),
837 DEVMETHOD(device_detach, bus_generic_detach),
838 DEVMETHOD(device_shutdown, bus_generic_shutdown),
839 DEVMETHOD(device_suspend, bus_generic_suspend),
840 DEVMETHOD(device_resume, bus_generic_resume),
843 DEVMETHOD(bus_print_child, fdc_print_child),
844 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
845 /* Our children never use any other bus interface methods. */
850 static driver_t fdc_driver = {
853 sizeof(struct fdc_data)
856 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
857 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, 0, 0);
859 /******************************************************************/
861 * devices attached to the controller section.
864 fd_probe(device_t dev)
869 struct fdc_data *fdc;
871 static int fd_fifo = 0;
873 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
874 fd = device_get_softc(dev);
875 fdc = device_get_softc(device_get_parent(dev));
877 bzero(fd, sizeof *fd);
881 fd->fdu = device_get_unit(dev);
884 /* look up what bios thinks we have */
887 if ((fdc->flags & FDC_ISPCMCIA))
889 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
890 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
892 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
895 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
902 fdt = RTCFDT_144M; /* XXX probably */
905 /* is there a unit? */
906 if (fdt == RTCFDT_NONE)
910 set_motor(fdc, fdsu, TURNON);
911 DELAY(1000000); /* 1 sec */
913 /* XXX This doesn't work before the first set_motor() */
914 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
915 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
916 && enable_fifo(fdc) == 0) {
917 device_printf(device_get_parent(dev),
918 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
922 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
923 && (st3 & NE7_ST3_T0)) {
924 /* if at track 0, first seek inwards */
925 /* seek some steps: */
926 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
927 DELAY(300000); /* ...wait a moment... */
928 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
931 /* If we're at track 0 first seek inwards. */
932 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
933 /* Seek some steps... */
934 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
935 /* ...wait a moment... */
937 /* make ctrlr happy: */
938 fd_sense_int(fdc, 0, 0);
942 for (i = 0; i < 2; i++) {
944 * we must recalibrate twice, just in case the
945 * heads have been beyond cylinder 76, since most
946 * FDCs still barf when attempting to recalibrate
950 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
951 /* a second being enough for full stroke seek*/
952 DELAY(i == 0 ? 1000000 : 300000);
954 /* anything responding? */
955 if (fd_sense_int(fdc, &st0, 0) == 0 &&
956 (st0 & NE7_ST0_EC) == 0)
957 break; /* already probed succesfully */
961 set_motor(fdc, fdsu, TURNOFF);
963 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
966 fd->track = FD_NO_TRACK;
970 callout_init(&fd->toffhandle);
971 callout_init(&fd->tohandle);
972 callout_init(&fd->motor);
976 device_set_desc(dev, "1200-KB 5.25\" drive");
979 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
980 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
984 device_set_desc(dev, "1440-KB 3.5\" drive");
989 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
993 device_set_desc(dev, "360-KB 5.25\" drive");
997 kprintf("720-KB 3.5\" drive");
1003 fd->ft = fd_types[fd->type - 1];
1008 fd_attach(device_t dev)
1012 fd = device_get_softc(dev);
1014 disk_create(fd->fdu, &fd->disk, &fd_ops);
1017 * Make special raw floppy devices with preset types to
1018 * make formatting easier. These override the disk management
1019 * layer for the whole-slice-disk for partitions 128-191. Note
1020 * that we do not override partition 255, which is the
1021 * whole-slice-part. If we did we would have to provide our
1022 * own DIOCGPART ioctl.
1024 dev_ops_add(&fd_ops,
1025 dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),
1026 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128));
1027 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 1),
1028 UID_ROOT, GID_WHEEL, 0600, "fd%d.1720", fd->fdu);
1029 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 2),
1030 UID_ROOT, GID_WHEEL, 0600, "fd%d.1480", fd->fdu);
1031 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 3),
1032 UID_ROOT, GID_WHEEL, 0600, "fd%d.1440", fd->fdu);
1033 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 4),
1034 UID_ROOT, GID_WHEEL, 0600, "fd%d.1200", fd->fdu);
1035 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 5),
1036 UID_ROOT, GID_WHEEL, 0600, "fd%d.820", fd->fdu);
1037 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 6),
1038 UID_ROOT, GID_WHEEL, 0600, "fd%d.800", fd->fdu);
1039 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 7),
1040 UID_ROOT, GID_WHEEL, 0600, "fd%d.720", fd->fdu);
1041 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 8),
1042 UID_ROOT, GID_WHEEL, 0600, "fd%d.360", fd->fdu);
1043 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 9),
1044 UID_ROOT, GID_WHEEL, 0600, "fd%d.640", fd->fdu);
1045 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 10),
1046 UID_ROOT, GID_WHEEL, 0600, "fd%d.1232", fd->fdu);
1048 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1049 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1050 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1051 DEVSTAT_PRIORITY_FD);
1056 fd_detach(device_t dev)
1060 fd = device_get_softc(dev);
1061 dev_ops_remove(&fd_ops,
1062 dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),
1063 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128));
1064 disk_invalidate(&fd->disk);
1065 disk_destroy(&fd->disk);
1066 devstat_remove_entry(&fd->device_stats);
1067 callout_stop(&fd->toffhandle);
1068 callout_stop(&fd->motor);
1073 static device_method_t fd_methods[] = {
1074 /* Device interface */
1075 DEVMETHOD(device_probe, fd_probe),
1076 DEVMETHOD(device_attach, fd_attach),
1077 DEVMETHOD(device_detach, fd_detach),
1078 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1079 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1080 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1085 static driver_t fd_driver = {
1088 sizeof(struct fd_data)
1091 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1093 /****************************************************************************/
1094 /* motor control stuff */
1095 /* remember to not deselect the drive we're working on */
1096 /****************************************************************************/
1098 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1100 int fdout = fdc->fdout;
1101 int needspecify = 0;
1104 fdout &= ~FDO_FDSEL;
1105 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1107 fdout &= ~(FDO_MOEN0 << fdsu);
1110 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1111 /* gonna turn off the last drive, put FDC to bed */
1112 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1114 /* make sure controller is selected and specified */
1115 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1117 fdout |= (FDO_FRST|FDO_FDMAEN);
1120 fdout_wr(fdc, fdout);
1122 TRACE1("[0x%x->FDOUT]", fdout);
1127 * special case: since we have just woken up the FDC
1128 * from its sleep, we silently assume the command will
1129 * be accepted, and do not test for a timeout
1131 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1132 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1134 if (fdc->flags & FDC_HAS_FIFO)
1135 (void) enable_fifo(fdc);
1140 fd_turnoff(void *xfd)
1144 TRACE1("[fd%d: turnoff]", fd->fdu);
1148 * Don't turn off the motor yet if the drive is active.
1150 * If we got here, this could only mean we missed an interrupt.
1151 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1152 * after a controller reset. Just schedule a pseudo-interrupt
1153 * so the state machine gets re-entered.
1155 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1161 fd->flags &= ~FD_MOTOR;
1162 set_motor(fd->fdc, fd->fdsu, TURNOFF);
1167 fd_motor_on(void *xfd)
1172 fd->flags &= ~FD_MOTOR_WAIT;
1173 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1183 if(!(fd->flags & FD_MOTOR))
1185 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1186 set_motor(fd->fdc, fd->fdsu, TURNON);
1187 callout_reset(&fd->motor, hz, fd_motor_on, fd);
1192 fdc_reset(fdc_p fdc)
1194 /* Try a reset, keep motor on */
1195 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1196 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1198 /* enable FDC, but defer interrupts a moment */
1199 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1200 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1202 fdout_wr(fdc, fdc->fdout);
1203 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1205 /* XXX after a reset, silently believe the FDC will accept commands */
1206 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1207 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1209 if (fdc->flags & FDC_HAS_FIFO)
1210 (void) enable_fifo(fdc);
1213 /****************************************************************************/
1215 /****************************************************************************/
1217 * FDC IO functions, take care of the main status register, timeout
1218 * in case the desired status bits are never set.
1220 * These PIO loops initially start out with short delays between
1221 * each iteration in the expectation that the required condition
1222 * is usually met quickly, so it can be handled immediately. After
1223 * about 1 ms, stepping is increased to achieve a better timing
1224 * accuracy in the calls to DELAY().
1227 fd_in(struct fdc_data *fdc, int *ptr)
1231 for (j = 0, step = 1;
1232 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1236 return (fdc_err(fdc, "ready for output in input\n"));
1241 if (j >= FDSTS_TIMEOUT)
1242 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1245 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1248 #else /* !FDC_DEBUG */
1253 #endif /* FDC_DEBUG */
1257 out_fdc(struct fdc_data *fdc, int x)
1261 for (j = 0, step = 1;
1262 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1265 if (i == (NE7_DIO|NE7_RQM))
1266 return (fdc_err(fdc, "ready for input in output\n"));
1271 if (j >= FDSTS_TIMEOUT)
1272 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1274 /* Send the command and return */
1276 TRACE1("[0x%x->FDDATA]", x);
1280 /****************************************************************************/
1281 /* fdopen/fdclose */
1282 /****************************************************************************/
1284 Fdopen(struct dev_open_args *ap)
1286 cdev_t dev = ap->a_head.a_dev;
1287 fdu_t fdu = dkunit(dev);
1288 struct disk_info info;
1296 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1299 if ((fdc == NULL) || (fd->type == NO_TYPE))
1303 * Figure out the type of floppy. There are special whole-disk-device
1304 * overrides that will override the current type.
1307 if (type == WHOLE_SLICE_PART) {
1308 type = fd->type; /* do not change selected type data */
1310 } else if (type > 128) {
1311 type -= 128; /* set to specific format */
1314 type = fd->type; /* reset to default */
1319 if (type != fd->type) {
1321 * For each type of basic drive, make sure we are trying
1322 * to open a type it can do,
1337 type = FD_1480in5_25;
1340 type = FD_1440in5_25;
1345 type = FD_820in5_25;
1348 type = FD_800in5_25;
1351 type = FD_720in5_25;
1354 type = FD_640in5_25;
1357 type = FD_360in5_25;
1364 if ( type != FD_1720
1378 * fd->type is the basic drive type, not the current format
1379 * we are reading. We only change the type when opening the
1380 * whole-slice-partition
1383 fd->ft = fd_types[type - 1];
1384 fd->flags |= FD_OPEN;
1387 * Clearing the DMA overrun counter at open time is a bit messy.
1388 * Since we're only managing one counter per controller, opening
1389 * the second drive could mess it up. Anyway, if the DMA overrun
1390 * condition is really persistent, it will eventually time out
1391 * still. OTOH, clearing it here will ensure we'll at least start
1392 * trying again after a previous (maybe even long ago) failure.
1393 * Also, this is merely a stop-gap measure only that should not
1394 * happen during normal operation, so we can tolerate it to be a
1395 * bit sloppy about this.
1397 fdc->dma_overruns = 0;
1400 * Set disk parameters for the disk management layer.
1402 * Note that we do not set RAWEXTENSIONS here. We override
1403 * the minor numbers in the raw-extension range and handle them
1406 bzero(&info, sizeof(info));
1408 info.d_media_blksize = 128 << ft->secsize;
1409 info.d_media_blocks = ft->size;
1410 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1411 info.d_nheads = ft->heads;
1412 info.d_secpertrack = ft->sectrac;
1413 info.d_secpercyl = ft->sectrac * ft->heads;
1414 info.d_ncylinders = ft->size / info.d_secpercyl;
1415 disk_setdiskinfo(&fd->disk, &info);
1421 fdclose(struct dev_close_args *ap)
1423 cdev_t dev = ap->a_head.a_dev;
1424 fdu_t fdu = dkunit(dev);
1427 fd = devclass_get_softc(fd_devclass, fdu);
1428 fd->flags &= ~FD_OPEN;
1429 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1434 /****************************************************************************/
1436 /****************************************************************************/
1438 fdstrategy(struct dev_strategy_args *ap)
1440 cdev_t dev = ap->a_head.a_dev;
1441 struct bio *bio = ap->a_bio;
1442 struct buf *bp = bio->bio_buf;
1443 unsigned nblocks, blknum, cando;
1450 fd = devclass_get_softc(fd_devclass, fdu);
1452 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1453 (u_long)major(dev), (u_long)minor(dev));
1455 if (fd->type == NO_TYPE) {
1456 bp->b_error = ENXIO;
1457 bp->b_flags |= B_ERROR;
1461 fdblk = 128 << (fd->ft.secsize);
1462 if (bp->b_cmd != BUF_CMD_FORMAT) {
1463 if (bio->bio_offset < 0) {
1465 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n",
1466 fdu, bio->bio_offset, bp->b_bcount);
1467 bp->b_error = EINVAL;
1468 bp->b_flags |= B_ERROR;
1471 if ((bp->b_bcount % fdblk) != 0) {
1472 bp->b_error = EINVAL;
1473 bp->b_flags |= B_ERROR;
1479 * Set up block calculations.
1481 if (bio->bio_offset > 20000000LL * fdblk) {
1483 * Reject unreasonably high block number, prevent the
1484 * multiplication below from overflowing.
1486 bp->b_error = EINVAL;
1487 bp->b_flags |= B_ERROR;
1490 blknum = (unsigned)(bio->bio_offset / fdblk);
1491 nblocks = fd->ft.size;
1493 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1494 if (blknum <= nblocks) {
1495 cando = (nblocks - blknum) * fdblk;
1496 bp->b_resid = bp->b_bcount - cando;
1498 goto bad; /* not actually bad but EOF */
1500 bp->b_error = EINVAL;
1501 bp->b_flags |= B_ERROR;
1506 bio->bio_driver_info = dev;
1507 bioqdisksort(&fdc->bio_queue, bio);
1508 callout_stop(&fd->toffhandle);
1510 /* Tell devstat we are starting on the transaction */
1511 devstat_start_transaction(&fd->device_stats);
1512 device_busy(fd->dev);
1523 /***************************************************************\
1525 * We have just queued something.. if the controller is not busy *
1526 * then simulate the case where it has just finished a command *
1527 * So that it (the interrupt routine) looks on the queue for more*
1528 * work to do and picks up what we just added. *
1529 * If the controller is already busy, we need do nothing, as it *
1530 * will pick up our work when the present work completes *
1531 \***************************************************************/
1533 fdstart(struct fdc_data *fdc)
1536 if(fdc->state == DEVIDLE)
1544 fd_iotimeout(void *xfdc)
1549 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1552 * Due to IBM's brain-dead design, the FDC has a faked ready
1553 * signal, hardwired to ready == true. Thus, any command
1554 * issued if there's no diskette in the drive will _never_
1555 * complete, and must be aborted by resetting the FDC.
1556 * Many thanks, Big Blue!
1557 * The FDC must not be reset directly, since that would
1558 * interfere with the state machine. Instead, pretend that
1559 * the command completed but was invalid. The state machine
1560 * will reset the FDC and retry once.
1563 fdc->status[0] = NE7_ST0_IC_IV;
1564 fdc->flags &= ~FDC_STAT_VALID;
1565 fdc->state = IOTIMEDOUT;
1570 /* just ensure it is running in a critical section */
1572 fd_pseudointr(void *xfdc)
1579 /***********************************************************************\
1581 * keep calling the state machine until it returns a 0 *
1582 * ALWAYS called at SPLBIO *
1583 \***********************************************************************/
1585 fdc_intr(void *xfdc)
1593 * magic pseudo-DMA initialization for YE FDC. Sets count and
1596 #define SET_BCDR(fdc,wr,cnt,port) \
1597 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1598 ((cnt)-1) & 0xff); \
1599 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1600 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1603 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1605 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
1607 u_char *cptr = (u_char *)addr;
1609 if (cmd == BUF_CMD_READ) {
1610 if (fdc->state != PIOREAD) {
1611 fdc->state = PIOREAD;
1614 SET_BCDR(fdc, 0, count, 0);
1615 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1616 FDC_YE_DATAPORT, cptr, count);
1618 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1619 FDC_YE_DATAPORT, cptr, count);
1620 SET_BCDR(fdc, 0, count, 0);
1625 /***********************************************************************\
1626 * The controller state machine. *
1627 * if it returns a non zero value, it should be called again immediatly *
1628 \***********************************************************************/
1632 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1633 unsigned blknum = 0, b_cylinder = 0;
1638 struct fd_formb *finfo = NULL;
1644 bio = bioq_first(&fdc->bio_queue);
1646 bioq_remove(&fdc->bio_queue, bio);
1651 /***********************************************\
1652 * nothing left for this controller to do *
1653 * Force into the IDLE state, *
1654 \***********************************************/
1655 fdc->state = DEVIDLE;
1657 device_printf(fdc->fdc_dev,
1658 "unexpected valid fd pointer\n");
1662 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1666 dev = bio->bio_driver_info;
1669 fd = devclass_get_softc(fd_devclass, fdu);
1670 fdblk = 128 << fd->ft.secsize;
1671 if (fdc->fd && (fd != fdc->fd))
1672 device_printf(fd->dev, "confused fd pointers\n");
1673 read = (bp->b_cmd == BUF_CMD_READ);
1674 format = (bp->b_cmd == BUF_CMD_FORMAT);
1676 finfo = (struct fd_formb *)bp->b_data;
1677 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1680 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1681 blknum = (unsigned)(bio->bio_offset / fdblk) +
1683 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads);
1685 TRACE1("fd%d", fdu);
1686 TRACE1("[%s]", fdstates[fdc->state]);
1687 TRACE1("(0x%x)", fd->flags);
1688 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
1692 case FINDWORK: /* we have found new work */
1697 fdc->fdctl_wr(fdc, fd->ft.trans);
1698 TRACE1("[0x%x->FDCTL]", fd->ft.trans);
1699 /*******************************************************\
1700 * If the next drive has a motor startup pending, then *
1701 * it will start up in its own good time *
1702 \*******************************************************/
1703 if(fd->flags & FD_MOTOR_WAIT) {
1704 fdc->state = MOTORWAIT;
1705 return (0); /* come back later */
1707 /*******************************************************\
1708 * Maybe if it's not starting, it SHOULD be starting *
1709 \*******************************************************/
1710 if (!(fd->flags & FD_MOTOR))
1712 fdc->state = MOTORWAIT;
1716 else /* at least make sure we are selected */
1718 set_motor(fdc, fd->fdsu, TURNON);
1720 if (fdc->flags & FDC_NEEDS_RESET) {
1721 fdc->state = RESETCTLR;
1722 fdc->flags &= ~FDC_NEEDS_RESET;
1724 fdc->state = DOSEEK;
1727 if (b_cylinder == (unsigned)fd->track)
1729 fdc->state = SEEKCOMPLETE;
1732 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1733 fd->fdsu, b_cylinder * fd->ft.steptrac,
1737 * seek command not accepted, looks like
1738 * the FDC went off to the Saints...
1740 fdc->retry = 6; /* try a reset */
1741 return(retrier(fdc));
1743 fd->track = FD_NO_TRACK;
1744 fdc->state = SEEKWAIT;
1745 return(0); /* will return later */
1747 /* allow heads to settle */
1748 callout_reset(&fdc->pseudointr_ch, hz / 16,
1749 fd_pseudointr, fdc);
1750 fdc->state = SEEKCOMPLETE;
1751 return(0); /* will return later */
1752 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1753 /* Make sure seek really happened*/
1754 if(fd->track == FD_NO_TRACK) {
1755 int descyl = b_cylinder * fd->ft.steptrac;
1758 * This might be a "ready changed" interrupt,
1759 * which cannot really happen since the
1760 * RDY pin is hardwired to + 5 volts. This
1761 * generally indicates a "bouncing" intr
1762 * line, so do one of the following:
1764 * When running on an enhanced FDC that is
1765 * known to not go stuck after responding
1766 * with INVALID, fetch all interrupt states
1767 * until seeing either an INVALID or a
1768 * real interrupt condition.
1770 * When running on a dumb old NE765, give
1771 * up immediately. The controller will
1772 * provide up to four dummy RC interrupt
1773 * conditions right after reset (for the
1774 * corresponding four drives), so this is
1775 * our only chance to get notice that it
1776 * was not the FDC that caused the interrupt.
1778 if (fd_sense_int(fdc, &st0, &cyl)
1781 if(fdc->fdct == FDC_NE765
1782 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1783 return 0; /* hope for a real intr */
1784 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1789 * seek to cyl 0 requested; make sure we are
1792 if (fd_sense_drive_status(fdc, &st3))
1794 if ((st3 & NE7_ST3_T0) == 0) {
1796 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1797 fdu, st3, NE7_ST3BITS);
1804 return (retrier(fdc));
1808 if (cyl != descyl) {
1810 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1811 fdu, descyl, cyl, st0);
1814 return (retrier(fdc));
1818 fd->track = b_cylinder;
1819 if (!(fdc->flags & FDC_NODMA)) {
1820 isa_dmastart(isa_dmabp(bp),
1821 bp->b_data+fd->skip,
1822 format ? bp->b_bcount : fdblk, fdc->dmachan);
1824 sectrac = fd->ft.sectrac;
1825 sec = blknum % (sectrac * fd->ft.heads);
1826 head = sec / sectrac;
1827 sec = sec % sectrac + 1;
1828 fd->hddrv = ((head&1)<<2)+fdu;
1832 /* make sure the drive is writable */
1833 if(fd_sense_drive_status(fdc, &st3) != 0)
1835 /* stuck controller? */
1836 if (!(fdc->flags & FDC_NODMA))
1837 isa_dmadone(isa_dmabp(bp),
1838 bp->b_data + fd->skip,
1839 format ? bp->b_bcount : fdblk,
1841 fdc->retry = 6; /* reset the beast */
1842 return (retrier(fdc));
1844 if(st3 & NE7_ST3_WP)
1847 * XXX YES! this is ugly.
1848 * in order to force the current operation
1849 * to fail, we will have to fake an FDC
1850 * error - all error handling is done
1853 fdc->status[0] = NE7_ST0_IC_AT;
1854 fdc->status[1] = NE7_ST1_NW;
1856 fdc->status[3] = fd->track;
1857 fdc->status[4] = head;
1858 fdc->status[5] = sec;
1859 fdc->retry = 8; /* break out immediately */
1860 fdc->state = IOTIMEDOUT; /* not really... */
1866 if (fdc->flags & FDC_NODMA) {
1868 * This seems to be necessary for
1869 * whatever obscure reason; if we omit
1870 * it, we end up filling the sector ID
1871 * fields of the newly formatted track
1872 * entirely with garbage, causing
1873 * `wrong cylinder' errors all over
1874 * the place when trying to read them
1879 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1881 (void)fdcpio(fdc,bp->b_cmd,
1882 bp->b_data+fd->skip,
1887 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1888 finfo->fd_formb_secshift,
1889 finfo->fd_formb_nsecs,
1890 finfo->fd_formb_gaplen,
1891 finfo->fd_formb_fillbyte, 0)) {
1892 /* controller fell over */
1893 if (!(fdc->flags & FDC_NODMA))
1894 isa_dmadone(isa_dmabp(bp),
1895 bp->b_data + fd->skip,
1896 format ? bp->b_bcount : fdblk,
1899 return (retrier(fdc));
1902 if (fdc->flags & FDC_NODMA) {
1904 * this seems to be necessary even when
1907 SET_BCDR(fdc, 1, fdblk, 0);
1910 * perform the write pseudo-DMA before
1911 * the WRITE command is sent
1914 (void)fdcpio(fdc,bp->b_cmd,
1915 bp->b_data+fd->skip,
1919 (read ? NE7CMD_READ : NE7CMD_WRITE),
1920 head << 2 | fdu, /* head & unit */
1921 fd->track, /* track */
1923 sec, /* sector + 1 */
1924 fd->ft.secsize, /* sector size */
1925 sectrac, /* sectors/track */
1926 fd->ft.gap, /* gap size */
1927 fd->ft.datalen, /* data length */
1929 /* the beast is sleeping again */
1930 if (!(fdc->flags & FDC_NODMA))
1931 isa_dmadone(isa_dmabp(bp),
1932 bp->b_data + fd->skip,
1933 format ? bp->b_bcount : fdblk,
1936 return (retrier(fdc));
1939 if (fdc->flags & FDC_NODMA)
1941 * if this is a read, then simply await interrupt
1942 * before performing PIO
1944 if (read && !fdcpio(fdc,bp->b_cmd,
1945 bp->b_data+fd->skip,fdblk)) {
1946 callout_reset(&fd->tohandle, hz,
1948 return(0); /* will return later */
1952 * write (or format) operation will fall through and
1953 * await completion interrupt
1955 fdc->state = IOCOMPLETE;
1956 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
1957 return (0); /* will return later */
1960 * actually perform the PIO read. The IOCOMPLETE case
1961 * removes the timeout for us.
1963 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
1964 fdc->state = IOCOMPLETE;
1966 case IOCOMPLETE: /* IO DONE, post-analyze */
1967 callout_stop(&fd->tohandle);
1969 if (fd_read_status(fdc, fd->fdsu)) {
1970 if (!(fdc->flags & FDC_NODMA)) {
1971 isa_dmadone(isa_dmabp(bp),
1972 bp->b_data + fd->skip,
1973 format ? bp->b_bcount : fdblk,
1977 fdc->retry = 6; /* force a reset */
1978 return (retrier(fdc));
1981 fdc->state = IOTIMEDOUT;
1986 if (!(fdc->flags & FDC_NODMA)) {
1987 isa_dmadone(isa_dmabp(bp),
1988 bp->b_data + fd->skip,
1989 format ? bp->b_bcount : fdblk, fdc->dmachan);
1991 if (fdc->status[0] & NE7_ST0_IC) {
1992 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1993 && fdc->status[1] & NE7_ST1_OR) {
1995 * DMA overrun. Someone hogged the bus and
1996 * didn't release it in time for the next
1999 * We normally restart this without bumping
2000 * the retry counter. However, in case
2001 * something is seriously messed up (like
2002 * broken hardware), we rather limit the
2003 * number of retries so the IO operation
2004 * doesn't block indefinately.
2006 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
2007 fdc->state = SEEKCOMPLETE;
2009 } /* else fall through */
2011 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
2013 fdc->retry = 6; /* force a reset */
2014 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2015 && fdc->status[2] & NE7_ST2_WC
2017 fdc->retry = 3; /* force recalibrate */
2018 return (retrier(fdc));
2021 /* Operation successful, retry DMA overruns again next time. */
2022 fdc->dma_overruns = 0;
2024 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
2025 /* set up next transfer */
2026 fdc->state = DOSEEK;
2031 device_unbusy(fd->dev);
2032 devstat_end_transaction_buf(&fd->device_stats, bp);
2036 fdc->state = FINDWORK;
2042 fdc->state = RESETCOMPLETE;
2046 * Discard all the results from the reset so that they
2047 * can't cause an unexpected interrupt later.
2049 for (i = 0; i < 4; i++)
2050 (void)fd_sense_int(fdc, &st0, &cyl);
2051 fdc->state = STARTRECAL;
2054 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
2057 return (retrier(fdc));
2059 fdc->state = RECALWAIT;
2060 return (0); /* will return later */
2062 /* allow heads to settle */
2063 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
2064 fdc->state = RECALCOMPLETE;
2065 return (0); /* will return later */
2069 * See SEEKCOMPLETE for a comment on this:
2071 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2073 if(fdc->fdct == FDC_NE765
2074 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2075 return 0; /* hope for a real intr */
2076 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2077 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2081 * a recalibrate from beyond cylinder 77
2082 * will "fail" due to the FDC limitations;
2083 * since people used to complain much about
2084 * the failure message, try not logging
2085 * this one if it seems to be the first
2088 kprintf("fd%d: recal failed ST0 %b cyl %d\n",
2089 fdu, st0, NE7_ST0BITS, cyl);
2090 if(fdc->retry < 3) fdc->retry = 3;
2091 return (retrier(fdc));
2094 /* Seek (probably) necessary */
2095 fdc->state = DOSEEK;
2096 return (1); /* will return immediatly */
2098 if(fd->flags & FD_MOTOR_WAIT)
2100 return (0); /* time's not up yet */
2102 if (fdc->flags & FDC_NEEDS_RESET) {
2103 fdc->state = RESETCTLR;
2104 fdc->flags &= ~FDC_NEEDS_RESET;
2107 * If all motors were off, then the controller was
2108 * reset, so it has lost track of the current
2109 * cylinder. Recalibrate to handle this case.
2110 * But first, discard the results of the reset.
2112 fdc->state = RESETCOMPLETE;
2114 return (1); /* will return immediatly */
2116 device_printf(fdc->fdc_dev, "unexpected FD int->");
2117 if (fd_read_status(fdc, fd->fdsu) == 0)
2118 kprintf("FDC status :%x %x %x %x %x %x %x ",
2127 kprintf("No status available ");
2128 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2130 kprintf("[controller is dead now]\n");
2133 kprintf("ST0 = %x, PCN = %x\n", st0, cyl);
2136 /*XXX confusing: some branches return immediately, others end up here*/
2137 return (1); /* Come back immediatly to new state */
2141 retrier(struct fdc_data *fdc)
2151 dev = bio->bio_driver_info;
2153 /* XXX shouldn't this be cached somewhere? */
2155 fd = devclass_get_softc(fd_devclass, fdu);
2156 if (fd->options & FDOPT_NORETRY)
2159 switch (fdc->retry) {
2160 case 0: case 1: case 2:
2161 fdc->state = SEEKCOMPLETE;
2163 case 3: case 4: case 5:
2164 fdc->state = STARTRECAL;
2167 fdc->state = RESETCTLR;
2174 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2178 * note: use the correct device for more
2179 * verbose error reporting.
2182 "hard error", LOG_PRINTF,
2186 if (fdc->flags & FDC_STAT_VALID)
2188 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2189 fdc->status[0], NE7_ST0BITS,
2190 fdc->status[1], NE7_ST1BITS,
2191 fdc->status[2], NE7_ST2BITS,
2192 fdc->status[3], fdc->status[4],
2195 kprintf(" (No status)\n");
2198 bp->b_flags |= B_ERROR;
2200 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2203 device_unbusy(fd->dev);
2204 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2206 fdc->state = FINDWORK;
2207 fdc->flags |= FDC_NEEDS_RESET;
2217 fdformat_wakeup(struct bio *bio)
2219 bio->bio_buf->b_cmd = BUF_CMD_DONE;
2224 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred)
2233 fd = devclass_get_softc(fd_devclass, fdu);
2234 fdblk = 128 << fd->ft.secsize;
2236 /* set up a buffer header for fdstrategy() */
2238 bp->b_cmd = BUF_CMD_FORMAT;
2241 * calculate a fake blkno, so fdstrategy() would initiate a
2242 * seek to the requested cylinder
2244 bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
2245 (fd->ft.sectrac * fd->ft.heads)
2246 + finfo->head * fd->ft.sectrac) * fdblk;
2247 bp->b_bio1.bio_driver_info = dev;
2248 bp->b_bio1.bio_done = fdformat_wakeup;
2250 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2251 bp->b_data = (caddr_t)finfo;
2253 /* now do the format */
2254 dev_dstrategy(dev, &bp->b_bio1);
2256 /* ...and wait for it to complete */
2258 while (bp->b_cmd != BUF_CMD_DONE) {
2259 rv = tsleep(&bp->b_bio1, 0, "fdform", 20 * hz);
2260 if (rv == EWOULDBLOCK)
2265 if (rv == EWOULDBLOCK) {
2268 device_unbusy(fd->dev);
2269 biodone(&bp->b_bio1);
2271 if (bp->b_flags & B_ERROR)
2274 * allow the process to be swapped
2281 * TODO: don't allocate buffer on stack.
2285 fdioctl(struct dev_ioctl_args *ap)
2287 cdev_t dev = ap->a_head.a_dev;
2288 fdu_t fdu = dkunit(dev);
2289 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2290 struct fdc_status *fsp;
2293 switch (ap->a_cmd) {
2295 if ((ap->a_fflag & FWRITE) == 0)
2296 error = EBADF; /* must be opened for writing */
2297 else if (((struct fd_formb *)ap->a_data)->format_version !=
2299 error = EINVAL; /* wrong version of formatting prog */
2301 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred);
2304 case FD_GTYPE: /* get drive type */
2305 *(struct fd_type *)ap->a_data = fd->ft;
2308 case FD_STYPE: /* set drive type */
2309 /* this is considered harmful; only allow for superuser */
2310 if (suser_cred(ap->a_cred, 0) != 0)
2312 fd->ft = *(struct fd_type *)ap->a_data;
2315 case FD_GOPTS: /* get drive options */
2316 *(int *)ap->a_data = fd->options;
2319 case FD_SOPTS: /* set drive options */
2320 fd->options = *(int *)ap->a_data;
2324 fsp = (struct fdc_status *)ap->a_data;
2325 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2327 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2338 * Hello emacs, these are the
2341 * c-continued-statement-offset: 8
2342 * c-continued-brace-offset: 0
2343 * c-brace-offset: -8
2344 * c-brace-imaginary-offset: 0
2345 * c-argdecl-indent: 8
2346 * c-label-offset: -8
2347 * c++-hanging-braces: 1
2348 * c++-access-specifier-offset: -8
2349 * c++-empty-arglist-indent: 8
2350 * c++-friend-offset: 0