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[dragonfly.git] / sys / dev / disk / fd / fd.c
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1/*
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Don Ahn.
7 *
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).
11 *
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)
16 *
17 * Copyright (c) 1993, 1994, 1995 by
18 * joerg_wunsch@uriah.sax.de (Joerg Wunsch)
19 * dufault@hda.com (Peter Dufault)
20 *
21 * Copyright (c) 2001 Joerg Wunsch,
22 * joerg_wunsch@uriah.sax.de (Joerg Wunsch)
23 *
24 * Redistribution and use in source and binary forms, with or without
25 * modification, are permitted provided that the following conditions
26 * are met:
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.
39 *
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
50 * SUCH DAMAGE.
51 *
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 *
55 */
56
57#include "opt_fdc.h"
58#include "card.h"
59
60#include <sys/param.h>
61#include <sys/systm.h>
62#include <sys/kernel.h>
63#include <sys/buf.h>
64#include <sys/bus.h>
65#include <sys/conf.h>
66#include <sys/disklabel.h>
67#include <sys/devicestat.h>
68#include <sys/fcntl.h>
69#include <sys/malloc.h>
70#include <sys/module.h>
71#include <sys/proc.h>
72#include <sys/syslog.h>
73
74#include <sys/bus.h>
75#include <machine/bus.h>
76#include <sys/rman.h>
77
78#include <machine/clock.h>
79#include <machine/ioctl_fd.h>
80#include <machine/resource.h>
81#include <machine/stdarg.h>
82
83#include <isa/isavar.h>
84#include <isa/isareg.h>
85#include <isa/fdreg.h>
86#include <isa/fdc.h>
87#include <isa/rtc.h>
88
89/* misuse a flag to identify format operation */
90#define B_FORMAT B_XXX
91
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 */
95
96/* internally used only, not really from CMOS: */
97#define RTCFDT_144M_PRETENDED 0x1000
98
99/* error returns for fd_cmd() */
100#define FD_FAILED -1
101#define FD_NOT_VALID -2
102#define FDC_ERRMAX 100 /* do not log more */
103/*
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
107 * is persistent.
108 */
109#define FDC_DMAOV_MAX 25
110
111/*
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.
116 *
117 * Timeouts of 100 msec are believed to be required for some broken
118 * (old) hardware.
119 */
120#define FDSTS_TIMEOUT 100000
121
122#define NUMTYPES 17
123#define NUMDENS (NUMTYPES - 7)
124
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 */
128#define FD_1720 1
129#define FD_1480 2
130#define FD_1440 3
131#define FD_1200 4
132#define FD_820 5
133#define FD_800 6
134#define FD_720 7
135#define FD_360 8
136#define FD_640 9
137#define FD_1232 10
138
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
146
147
148static struct fd_type fd_types[NUMTYPES] =
149{
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 */
160
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 */
168};
169
170#define DRVS_PER_CTLR 2 /* 2 floppies */
171
172/***********************************************************************\
173* Per controller structure. *
174\***********************************************************************/
175static devclass_t fdc_devclass;
176
177/***********************************************************************\
178* Per drive structure. *
179* N per controller (DRVS_PER_CTLR) *
180\***********************************************************************/
181struct fd_data {
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; /* pointer to the type descriptor */
186 int flags;
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 */
191 int skip;
192 int hddrv;
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_handle toffhandle;
197 struct callout_handle tohandle;
198 struct devstat device_stats;
199 device_t dev;
200 fdu_t fdu;
201};
202
203struct fdc_ivars {
204 int fdunit;
205};
206static devclass_t fd_devclass;
207
208/***********************************************************************\
209* Throughout this file the following conventions will be used: *
210* fd is a pointer to the fd_data struct for the drive in question *
211* fdc is a pointer to the fdc_data struct for the controller *
212* fdu is the floppy drive unit number *
213* fdcu is the floppy controller unit number *
214* fdsu is the floppy drive unit number on that controller. (sub-unit) *
215\***********************************************************************/
216
217/* internal functions */
218static void fdc_intr(void *);
219static void set_motor(struct fdc_data *, int, int);
220# define TURNON 1
221# define TURNOFF 0
222static timeout_t fd_turnoff;
223static timeout_t fd_motor_on;
224static void fd_turnon(struct fd_data *);
225static void fdc_reset(fdc_p);
226static int fd_in(struct fdc_data *, int *);
227static int out_fdc(struct fdc_data *, int);
228static void fdstart(struct fdc_data *);
229static timeout_t fd_iotimeout;
230static timeout_t fd_pseudointr;
231static int fdstate(struct fdc_data *);
232static int retrier(struct fdc_data *);
233static int fdformat(dev_t, struct fd_formb *, struct proc *);
234
235static int enable_fifo(fdc_p fdc);
236
237static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
238
239
240#define DEVIDLE 0
241#define FINDWORK 1
242#define DOSEEK 2
243#define SEEKCOMPLETE 3
244#define IOCOMPLETE 4
245#define RECALCOMPLETE 5
246#define STARTRECAL 6
247#define RESETCTLR 7
248#define SEEKWAIT 8
249#define RECALWAIT 9
250#define MOTORWAIT 10
251#define IOTIMEDOUT 11
252#define RESETCOMPLETE 12
253#define PIOREAD 13
254
255#ifdef FDC_DEBUG
256static char const * const fdstates[] =
257{
258"DEVIDLE",
259"FINDWORK",
260"DOSEEK",
261"SEEKCOMPLETE",
262"IOCOMPLETE",
263"RECALCOMPLETE",
264"STARTRECAL",
265"RESETCTLR",
266"SEEKWAIT",
267"RECALWAIT",
268"MOTORWAIT",
269"IOTIMEDOUT",
270"RESETCOMPLETE",
271"PIOREAD",
272};
273
274/* CAUTION: fd_debug causes huge amounts of logging output */
275static int volatile fd_debug = 0;
276#define TRACE0(arg) if(fd_debug) printf(arg)
277#define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2)
278#else /* FDC_DEBUG */
279#define TRACE0(arg)
280#define TRACE1(arg1, arg2)
281#endif /* FDC_DEBUG */
282
283static void
284fdout_wr(fdc_p fdc, u_int8_t v)
285{
286 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
287}
288
289static u_int8_t
290fdsts_rd(fdc_p fdc)
291{
292 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
293}
294
295static void
296fddata_wr(fdc_p fdc, u_int8_t v)
297{
298 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
299}
300
301static u_int8_t
302fddata_rd(fdc_p fdc)
303{
304 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
305}
306
307static void
308fdctl_wr_isa(fdc_p fdc, u_int8_t v)
309{
310 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
311}
312
313#if NCARD > 0
314static void
315fdctl_wr_pcmcia(fdc_p fdc, u_int8_t v)
316{
317 bus_space_write_1(fdc->portt, fdc->porth, FDCTL+fdc->port_off, v);
318}
319#endif
320
321#if 0
322
323static u_int8_t
324fdin_rd(fdc_p fdc)
325{
326 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
327}
328
329#endif
330
331static d_open_t Fdopen; /* NOTE, not fdopen */
332static d_close_t fdclose;
333static d_ioctl_t fdioctl;
334static d_strategy_t fdstrategy;
335
336#define CDEV_MAJOR 9
337#define BDEV_MAJOR 2
338
339static struct cdevsw fd_cdevsw = {
340 /* open */ Fdopen,
341 /* close */ fdclose,
342 /* read */ physread,
343 /* write */ physwrite,
344 /* ioctl */ fdioctl,
345 /* poll */ nopoll,
346 /* mmap */ nommap,
347 /* strategy */ fdstrategy,
348 /* name */ "fd",
349 /* maj */ CDEV_MAJOR,
350 /* dump */ nodump,
351 /* psize */ nopsize,
352 /* flags */ D_DISK,
353 /* bmaj */ BDEV_MAJOR
354};
355
356static int
357fdc_err(struct fdc_data *fdc, const char *s)
358{
359 fdc->fdc_errs++;
360 if (s) {
361 if (fdc->fdc_errs < FDC_ERRMAX)
362 device_printf(fdc->fdc_dev, "%s", s);
363 else if (fdc->fdc_errs == FDC_ERRMAX)
364 device_printf(fdc->fdc_dev, "too many errors, not "
365 "logging any more\n");
366 }
367
368 return FD_FAILED;
369}
370
371/*
372 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
373 * Unit number,
374 * # of output bytes, output bytes as ints ...,
375 * # of input bytes, input bytes as ints ...
376 */
377static int
378fd_cmd(struct fdc_data *fdc, int n_out, ...)
379{
380 u_char cmd;
381 int n_in;
382 int n;
383 va_list ap;
384
385 va_start(ap, n_out);
386 cmd = (u_char)(va_arg(ap, int));
387 va_end(ap);
388 va_start(ap, n_out);
389 for (n = 0; n < n_out; n++)
390 {
391 if (out_fdc(fdc, va_arg(ap, int)) < 0)
392 {
393 char msg[50];
394 snprintf(msg, sizeof(msg),
395 "cmd %x failed at out byte %d of %d\n",
396 cmd, n + 1, n_out);
397 return fdc_err(fdc, msg);
398 }
399 }
400 n_in = va_arg(ap, int);
401 for (n = 0; n < n_in; n++)
402 {
403 int *ptr = va_arg(ap, int *);
404 if (fd_in(fdc, ptr) < 0)
405 {
406 char msg[50];
407 snprintf(msg, sizeof(msg),
408 "cmd %02x failed at in byte %d of %d\n",
409 cmd, n + 1, n_in);
410 return fdc_err(fdc, msg);
411 }
412 }
413
414 return 0;
415}
416
417static int
418enable_fifo(fdc_p fdc)
419{
420 int i, j;
421
422 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
423
424 /*
425 * XXX:
426 * Cannot use fd_cmd the normal way here, since
427 * this might be an invalid command. Thus we send the
428 * first byte, and check for an early turn of data directon.
429 */
430
431 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
432 return fdc_err(fdc, "Enable FIFO failed\n");
433
434 /* If command is invalid, return */
435 j = FDSTS_TIMEOUT;
436 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
437 != NE7_RQM && j-- > 0) {
438 if (i == (NE7_DIO | NE7_RQM)) {
439 fdc_reset(fdc);
440 return FD_FAILED;
441 }
442 DELAY(1);
443 }
444 if (j<0 ||
445 fd_cmd(fdc, 3,
446 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
447 fdc_reset(fdc);
448 return fdc_err(fdc, "Enable FIFO failed\n");
449 }
450 fdc->flags |= FDC_HAS_FIFO;
451 return 0;
452 }
453 if (fd_cmd(fdc, 4,
454 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
455 return fdc_err(fdc, "Re-enable FIFO failed\n");
456 return 0;
457}
458
459static int
460fd_sense_drive_status(fdc_p fdc, int *st3p)
461{
462 int st3;
463
464 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
465 {
466 return fdc_err(fdc, "Sense Drive Status failed\n");
467 }
468 if (st3p)
469 *st3p = st3;
470
471 return 0;
472}
473
474static int
475fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
476{
477 int cyl, st0, ret;
478
479 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
480 if (ret) {
481 (void)fdc_err(fdc,
482 "sense intr err reading stat reg 0\n");
483 return ret;
484 }
485
486 if (st0p)
487 *st0p = st0;
488
489 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
490 /*
491 * There doesn't seem to have been an interrupt.
492 */
493 return FD_NOT_VALID;
494 }
495
496 if (fd_in(fdc, &cyl) < 0) {
497 return fdc_err(fdc, "can't get cyl num\n");
498 }
499
500 if (cylp)
501 *cylp = cyl;
502
503 return 0;
504}
505
506
507static int
508fd_read_status(fdc_p fdc, int fdsu)
509{
510 int i, ret;
511
512 for (i = 0; i < 7; i++) {
513 /*
514 * XXX types are poorly chosen. Only bytes can by read
515 * from the hardware, but fdc->status[] wants u_ints and
516 * fd_in() gives ints.
517 */
518 int status;
519
520 ret = fd_in(fdc, &status);
521 fdc->status[i] = status;
522 if (ret != 0)
523 break;
524 }
525
526 if (ret == 0)
527 fdc->flags |= FDC_STAT_VALID;
528 else
529 fdc->flags &= ~FDC_STAT_VALID;
530
531 return ret;
532}
533
534/****************************************************************************/
535/* autoconfiguration stuff */
536/****************************************************************************/
537
538static int
539fdc_alloc_resources(struct fdc_data *fdc)
540{
541 device_t dev;
542 int ispnp, ispcmcia;
543
544 dev = fdc->fdc_dev;
545 ispnp = (fdc->flags & FDC_ISPNP) != 0;
546 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
547 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
548 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
549
550 /*
551 * On standard ISA, we don't just use an 8 port range
552 * (e.g. 0x3f0-0x3f7) since that covers an IDE control
553 * register at 0x3f6.
554 *
555 * Isn't PC hardware wonderful.
556 *
557 * The Y-E Data PCMCIA FDC doesn't have this problem, it
558 * uses the register with offset 6 for pseudo-DMA, and the
559 * one with offset 7 as control register.
560 */
561 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
562 &fdc->rid_ioport, 0ul, ~0ul,
563 ispcmcia ? 8 : (ispnp ? 1 : 6),
564 RF_ACTIVE);
565 if (fdc->res_ioport == 0) {
566 device_printf(dev, "cannot reserve I/O port range\n");
567 return ENXIO;
568 }
569 fdc->portt = rman_get_bustag(fdc->res_ioport);
570 fdc->porth = rman_get_bushandle(fdc->res_ioport);
571
572 if (!ispcmcia) {
573 /*
574 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
575 * and some at 0x3f0-0x3f5,0x3f7. We detect the former
576 * by checking the size and adjust the port address
577 * accordingly.
578 */
579 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
580 fdc->port_off = -2;
581
582 /*
583 * Register the control port range as rid 1 if it
584 * isn't there already. Most PnP BIOSen will have
585 * already done this but non-PnP configurations don't.
586 *
587 * And some (!!) report 0x3f2-0x3f5 and completely
588 * leave out the control register! It seems that some
589 * non-antique controller chips have a different
590 * method of programming the transfer speed which
591 * doesn't require the control register, but it's
592 * mighty bogus as the chip still responds to the
593 * address for the control register.
594 */
595 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
596 u_long ctlstart;
597
598 /* Find the control port, usually 0x3f7 */
599 ctlstart = rman_get_start(fdc->res_ioport) +
600 fdc->port_off + 7;
601
602 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
603 }
604
605 /*
606 * Now (finally!) allocate the control port.
607 */
608 fdc->rid_ctl = 1;
609 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
610 &fdc->rid_ctl,
611 0ul, ~0ul, 1, RF_ACTIVE);
612 if (fdc->res_ctl == 0) {
613 device_printf(dev,
614 "cannot reserve control I/O port range\n");
615 return ENXIO;
616 }
617 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
618 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
619 }
620
621 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
622 &fdc->rid_irq, 0ul, ~0ul, 1,
623 RF_ACTIVE);
624 if (fdc->res_irq == 0) {
625 device_printf(dev, "cannot reserve interrupt line\n");
626 return ENXIO;
627 }
628
629 if ((fdc->flags & FDC_NODMA) == 0) {
630 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
631 &fdc->rid_drq, 0ul, ~0ul, 1,
632 RF_ACTIVE);
633 if (fdc->res_drq == 0) {
634 device_printf(dev, "cannot reserve DMA request line\n");
635 return ENXIO;
636 }
637 fdc->dmachan = fdc->res_drq->r_start;
638 }
639
640 return 0;
641}
642
643static void
644fdc_release_resources(struct fdc_data *fdc)
645{
646 device_t dev;
647
648 dev = fdc->fdc_dev;
649 if (fdc->res_irq != 0) {
650 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
651 fdc->res_irq);
652 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
653 fdc->res_irq);
654 }
655 if (fdc->res_ctl != 0) {
656 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
657 fdc->res_ctl);
658 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
659 fdc->res_ctl);
660 }
661 if (fdc->res_ioport != 0) {
662 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
663 fdc->res_ioport);
664 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
665 fdc->res_ioport);
666 }
667 if (fdc->res_drq != 0) {
668 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
669 fdc->res_drq);
670 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
671 fdc->res_drq);
672 }
673}
674
675/****************************************************************************/
676/* autoconfiguration stuff */
677/****************************************************************************/
678
679static struct isa_pnp_id fdc_ids[] = {
680 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
681 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
682 {0}
683};
684
685static int
686fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
687{
688 struct fdc_ivars *ivars = device_get_ivars(child);
689
690 switch (which) {
691 case FDC_IVAR_FDUNIT:
692 *result = ivars->fdunit;
693 break;
694 default:
695 return ENOENT;
696 }
697 return 0;
698}
699
700/*
701 * fdc controller section.
702 */
703static int
704fdc_probe(device_t dev)
705{
706 int error, ic_type;
707 struct fdc_data *fdc;
708
709 fdc = device_get_softc(dev);
710 bzero(fdc, sizeof *fdc);
711 fdc->fdc_dev = dev;
712 fdc->fdctl_wr = fdctl_wr_isa;
713
714 /* Check pnp ids */
715 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
716 if (error == ENXIO)
717 return ENXIO;
718 if (error == 0)
719 fdc->flags |= FDC_ISPNP;
720
721 /* Attempt to allocate our resources for the duration of the probe */
722 error = fdc_alloc_resources(fdc);
723 if (error)
724 goto out;
725
726 /* First - lets reset the floppy controller */
727 fdout_wr(fdc, 0);
728 DELAY(100);
729 fdout_wr(fdc, FDO_FRST);
730
731 /* see if it can handle a command */
732 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
733 NE7_SPEC_2(2, 0), 0)) {
734 error = ENXIO;
735 goto out;
736 }
737
738 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
739 ic_type = (u_char)ic_type;
740 switch (ic_type) {
741 case 0x80:
742 device_set_desc(dev, "NEC 765 or clone");
743 fdc->fdct = FDC_NE765;
744 break;
745 case 0x81:
746 device_set_desc(dev, "Intel 82077 or clone");
747 fdc->fdct = FDC_I82077;
748 break;
749 case 0x90:
750 device_set_desc(dev, "NEC 72065B or clone");
751 fdc->fdct = FDC_NE72065;
752 break;
753 default:
754 device_set_desc(dev, "generic floppy controller");
755 fdc->fdct = FDC_UNKNOWN;
756 break;
757 }
758 }
759
760out:
761 fdc_release_resources(fdc);
762 return (error);
763}
764
765#if NCARD > 0
766
767static int
768fdc_pccard_probe(device_t dev)
769{
770 int error;
771 struct fdc_data *fdc;
772
773 fdc = device_get_softc(dev);
774 bzero(fdc, sizeof *fdc);
775 fdc->fdc_dev = dev;
776 fdc->fdctl_wr = fdctl_wr_pcmcia;
777
778 fdc->flags |= FDC_ISPCMCIA | FDC_NODMA;
779
780 /* Attempt to allocate our resources for the duration of the probe */
781 error = fdc_alloc_resources(fdc);
782 if (error)
783 goto out;
784
785 /* First - lets reset the floppy controller */
786 fdout_wr(fdc, 0);
787 DELAY(100);
788 fdout_wr(fdc, FDO_FRST);
789
790 /* see if it can handle a command */
791 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
792 NE7_SPEC_2(2, 0), 0)) {
793 error = ENXIO;
794 goto out;
795 }
796
797 device_set_desc(dev, "Y-E Data PCMCIA floppy");
798 fdc->fdct = FDC_NE765;
799
800out:
801 fdc_release_resources(fdc);
802 return (error);
803}
804
805static int
806fdc_pccard_detach(device_t dev)
807{
808 struct fdc_data *fdc;
809 int error;
810
811 fdc = device_get_softc(dev);
812
813 /* have our children detached first */
814 if ((error = bus_generic_detach(dev)))
815 return (error);
816
817 if ((fdc->flags & FDC_ATTACHED) == 0) {
818 device_printf(dev, "already unloaded\n");
819 return (0);
820 }
821 fdc->flags &= ~FDC_ATTACHED;
822
823 BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq,
824 fdc->fdc_intr);
825 fdc_release_resources(fdc);
826 device_printf(dev, "unload\n");
827 return (0);
828}
829
830#endif /* NCARD > 0 */
831
832/*
833 * Add a child device to the fdc controller. It will then be probed etc.
834 */
835static void
836fdc_add_child(device_t dev, const char *name, int unit)
837{
838 int disabled;
839 struct fdc_ivars *ivar;
840 device_t child;
841
842 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT);
843 if (ivar == NULL)
844 return;
845 bzero(ivar, sizeof *ivar);
846 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
847 ivar->fdunit = 0;
848 child = device_add_child(dev, name, unit);
849 if (child == NULL)
850 return;
851 device_set_ivars(child, ivar);
852 if (resource_int_value(name, unit, "disabled", &disabled) == 0
853 && disabled != 0)
854 device_disable(child);
855}
856
857static int
858fdc_attach(device_t dev)
859{
860 struct fdc_data *fdc;
861 int i, error;
862
863 fdc = device_get_softc(dev);
864 error = fdc_alloc_resources(fdc);
865 if (error) {
866 device_printf(dev, "cannot re-aquire resources\n");
867 return error;
868 }
869 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
870 INTR_TYPE_BIO, fdc_intr, fdc, &fdc->fdc_intr);
871 if (error) {
872 device_printf(dev, "cannot setup interrupt\n");
873 return error;
874 }
875 fdc->fdcu = device_get_unit(dev);
876 fdc->flags |= FDC_ATTACHED;
877
878 if ((fdc->flags & FDC_NODMA) == 0) {
879 /* Acquire the DMA channel forever, The driver will do the rest */
880 /* XXX should integrate with rman */
881 isa_dma_acquire(fdc->dmachan);
882 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
883 }
884 fdc->state = DEVIDLE;
885
886 /* reset controller, turn motor off, clear fdout mirror reg */
887 fdout_wr(fdc, ((fdc->fdout = 0)));
888 bufq_init(&fdc->head);
889
890 /*
891 * Probe and attach any children. We should probably detect
892 * devices from the BIOS unless overridden.
893 */
894 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
895 i != -1;
896 i = resource_query_string(i, "at", device_get_nameunit(dev)))
897 fdc_add_child(dev, resource_query_name(i),
898 resource_query_unit(i));
899
900 return (bus_generic_attach(dev));
901}
902
903static int
904fdc_print_child(device_t me, device_t child)
905{
906 int retval = 0;
907
908 retval += bus_print_child_header(me, child);
909 retval += printf(" on %s drive %d\n", device_get_nameunit(me),
910 fdc_get_fdunit(child));
911
912 return (retval);
913}
914
915static device_method_t fdc_methods[] = {
916 /* Device interface */
917 DEVMETHOD(device_probe, fdc_probe),
918 DEVMETHOD(device_attach, fdc_attach),
919 DEVMETHOD(device_detach, bus_generic_detach),
920 DEVMETHOD(device_shutdown, bus_generic_shutdown),
921 DEVMETHOD(device_suspend, bus_generic_suspend),
922 DEVMETHOD(device_resume, bus_generic_resume),
923
924 /* Bus interface */
925 DEVMETHOD(bus_print_child, fdc_print_child),
926 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
927 /* Our children never use any other bus interface methods. */
928
929 { 0, 0 }
930};
931
932static driver_t fdc_driver = {
933 "fdc",
934 fdc_methods,
935 sizeof(struct fdc_data)
936};
937
938DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
939
940#if NCARD > 0
941
942static device_method_t fdc_pccard_methods[] = {
943 /* Device interface */
944 DEVMETHOD(device_probe, fdc_pccard_probe),
945 DEVMETHOD(device_attach, fdc_attach),
946 DEVMETHOD(device_detach, fdc_pccard_detach),
947 DEVMETHOD(device_shutdown, bus_generic_shutdown),
948 DEVMETHOD(device_suspend, bus_generic_suspend),
949 DEVMETHOD(device_resume, bus_generic_resume),
950
951 /* Bus interface */
952 DEVMETHOD(bus_print_child, fdc_print_child),
953 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
954 /* Our children never use any other bus interface methods. */
955
956 { 0, 0 }
957};
958
959static driver_t fdc_pccard_driver = {
960 "fdc",
961 fdc_pccard_methods,
962 sizeof(struct fdc_data)
963};
964
965DRIVER_MODULE(fdc, pccard, fdc_pccard_driver, fdc_devclass, 0, 0);
966
967#endif /* NCARD > 0 */
968
969/******************************************************************/
970/*
971 * devices attached to the controller section.
972 */
973static int
974fd_probe(device_t dev)
975{
976 int i;
977 u_int fdt, st0, st3;
978 struct fd_data *fd;
979 struct fdc_data *fdc;
980 fdsu_t fdsu;
981 static int fd_fifo = 0;
982
983 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
984 fd = device_get_softc(dev);
985 fdc = device_get_softc(device_get_parent(dev));
986
987 bzero(fd, sizeof *fd);
988 fd->dev = dev;
989 fd->fdc = fdc;
990 fd->fdsu = fdsu;
991 fd->fdu = device_get_unit(dev);
992
993#ifdef __i386__
994 /* look up what bios thinks we have */
995 switch (fd->fdu) {
996 case 0:
997 if ((fdc->flags & FDC_ISPCMCIA))
998 fdt = RTCFDT_144M;
999 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
1000 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
1001 else
1002 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
1003 break;
1004 case 1:
1005 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
1006 break;
1007 default:
1008 fdt = RTCFDT_NONE;
1009 break;
1010 }
1011#else
1012 fdt = RTCFDT_144M; /* XXX probably */
1013#endif
1014
1015 /* is there a unit? */
1016 if (fdt == RTCFDT_NONE)
1017 return (ENXIO);
1018
1019 /* select it */
1020 set_motor(fdc, fdsu, TURNON);
1021 DELAY(1000000); /* 1 sec */
1022
1023 /* XXX This doesn't work before the first set_motor() */
1024 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
1025 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
1026 && enable_fifo(fdc) == 0) {
1027 device_printf(device_get_parent(dev),
1028 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
1029 }
1030 fd_fifo = 1;
1031
1032 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
1033 && (st3 & NE7_ST3_T0)) {
1034 /* if at track 0, first seek inwards */
1035 /* seek some steps: */
1036 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
1037 DELAY(300000); /* ...wait a moment... */
1038 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
1039 }
1040
1041 /* If we're at track 0 first seek inwards. */
1042 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
1043 /* Seek some steps... */
1044 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
1045 /* ...wait a moment... */
1046 DELAY(300000);
1047 /* make ctrlr happy: */
1048 fd_sense_int(fdc, 0, 0);
1049 }
1050 }
1051
1052 for (i = 0; i < 2; i++) {
1053 /*
1054 * we must recalibrate twice, just in case the
1055 * heads have been beyond cylinder 76, since most
1056 * FDCs still barf when attempting to recalibrate
1057 * more than 77 steps
1058 */
1059 /* go back to 0: */
1060 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
1061 /* a second being enough for full stroke seek*/
1062 DELAY(i == 0 ? 1000000 : 300000);
1063
1064 /* anything responding? */
1065 if (fd_sense_int(fdc, &st0, 0) == 0 &&
1066 (st0 & NE7_ST0_EC) == 0)
1067 break; /* already probed succesfully */
1068 }
1069 }
1070
1071 set_motor(fdc, fdsu, TURNOFF);
1072
1073 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
1074 return (ENXIO);
1075
1076 fd->track = FD_NO_TRACK;
1077 fd->fdc = fdc;
1078 fd->fdsu = fdsu;
1079 fd->options = 0;
1080 callout_handle_init(&fd->toffhandle);
1081 callout_handle_init(&fd->tohandle);
1082
1083 switch (fdt) {
1084 case RTCFDT_12M:
1085 device_set_desc(dev, "1200-KB 5.25\" drive");
1086 fd->type = FD_1200;
1087 break;
1088 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
1089 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
1090 fdt = RTCFDT_144M;
1091 fd->type = FD_1440;
1092 case RTCFDT_144M:
1093 device_set_desc(dev, "1440-KB 3.5\" drive");
1094 fd->type = FD_1440;
1095 break;
1096 case RTCFDT_288M:
1097 case RTCFDT_288M_1:
1098 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
1099 fd->type = FD_1440;
1100 break;
1101 case RTCFDT_360K:
1102 device_set_desc(dev, "360-KB 5.25\" drive");
1103 fd->type = FD_360;
1104 break;
1105 case RTCFDT_720K:
1106 printf("720-KB 3.5\" drive");
1107 fd->type = FD_720;
1108 break;
1109 default:
1110 return (ENXIO);
1111 }
1112 return (0);
1113}
1114
1115static int
1116fd_attach(device_t dev)
1117{
1118 struct fd_data *fd;
1119#if 0
1120 int i;
1121 int mynor;
1122 int typemynor;
1123 int typesize;
1124#endif
1125 static int cdevsw_add_done = 0;
1126
1127 fd = device_get_softc(dev);
1128
1129 if (!cdevsw_add_done) {
1130 cdevsw_add(&fd_cdevsw); /* XXX */
1131 cdevsw_add_done++;
1132 }
1133 make_dev(&fd_cdevsw, (fd->fdu << 6),
1134 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu);
1135
1136#if 0
1137 /* Other make_dev() go here. */
1138#endif
1139
1140 /*
1141 * Export the drive to the devstat interface.
1142 */
1143 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1144 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1145 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1146 DEVSTAT_PRIORITY_FD);
1147 return (0);
1148}
1149
1150static int
1151fd_detach(device_t dev)
1152{
1153 struct fd_data *fd;
1154
1155 fd = device_get_softc(dev);
1156 untimeout(fd_turnoff, fd, fd->toffhandle);
1157
1158 return (0);
1159}
1160
1161static device_method_t fd_methods[] = {
1162 /* Device interface */
1163 DEVMETHOD(device_probe, fd_probe),
1164 DEVMETHOD(device_attach, fd_attach),
1165 DEVMETHOD(device_detach, fd_detach),
1166 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1167 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1168 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1169
1170 { 0, 0 }
1171};
1172
1173static driver_t fd_driver = {
1174 "fd",
1175 fd_methods,
1176 sizeof(struct fd_data)
1177};
1178
1179DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1180
1181/****************************************************************************/
1182/* motor control stuff */
1183/* remember to not deselect the drive we're working on */
1184/****************************************************************************/
1185static void
1186set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1187{
1188 int fdout = fdc->fdout;
1189 int needspecify = 0;
1190
1191 if(turnon) {
1192 fdout &= ~FDO_FDSEL;
1193 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1194 } else
1195 fdout &= ~(FDO_MOEN0 << fdsu);
1196
1197 if(!turnon
1198 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1199 /* gonna turn off the last drive, put FDC to bed */
1200 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1201 else {
1202 /* make sure controller is selected and specified */
1203 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1204 needspecify = 1;
1205 fdout |= (FDO_FRST|FDO_FDMAEN);
1206 }
1207
1208 fdout_wr(fdc, fdout);
1209 fdc->fdout = fdout;
1210 TRACE1("[0x%x->FDOUT]", fdout);
1211
1212 if (needspecify) {
1213 /*
1214 * XXX
1215 * special case: since we have just woken up the FDC
1216 * from its sleep, we silently assume the command will
1217 * be accepted, and do not test for a timeout
1218 */
1219 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1220 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1221 0);
1222 if (fdc->flags & FDC_HAS_FIFO)
1223 (void) enable_fifo(fdc);
1224 }
1225}
1226
1227static void
1228fd_turnoff(void *xfd)
1229{
1230 int s;
1231 fd_p fd = xfd;
1232
1233 TRACE1("[fd%d: turnoff]", fd->fdu);
1234
1235 s = splbio();
1236 /*
1237 * Don't turn off the motor yet if the drive is active.
1238 *
1239 * If we got here, this could only mean we missed an interrupt.
1240 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1241 * after a controller reset. Just schedule a pseudo-interrupt
1242 * so the state machine gets re-entered.
1243 */
1244 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1245 fdc_intr(fd->fdc);
1246 splx(s);
1247 return;
1248 }
1249
1250 fd->flags &= ~FD_MOTOR;
1251 set_motor(fd->fdc, fd->fdsu, TURNOFF);
1252 splx(s);
1253}
1254
1255static void
1256fd_motor_on(void *xfd)
1257{
1258 int s;
1259 fd_p fd = xfd;
1260
1261 s = splbio();
1262 fd->flags &= ~FD_MOTOR_WAIT;
1263 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1264 {
1265 fdc_intr(fd->fdc);
1266 }
1267 splx(s);
1268}
1269
1270static void
1271fd_turnon(fd_p fd)
1272{
1273 if(!(fd->flags & FD_MOTOR))
1274 {
1275 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1276 set_motor(fd->fdc, fd->fdsu, TURNON);
1277 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */
1278 }
1279}
1280
1281static void
1282fdc_reset(fdc_p fdc)
1283{
1284 /* Try a reset, keep motor on */
1285 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1286 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1287 DELAY(100);
1288 /* enable FDC, but defer interrupts a moment */
1289 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1290 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1291 DELAY(100);
1292 fdout_wr(fdc, fdc->fdout);
1293 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1294
1295 /* XXX after a reset, silently believe the FDC will accept commands */
1296 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1297 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1298 0);
1299 if (fdc->flags & FDC_HAS_FIFO)
1300 (void) enable_fifo(fdc);
1301}
1302
1303/****************************************************************************/
1304/* fdc in/out */
1305/****************************************************************************/
1306/*
1307 * FDC IO functions, take care of the main status register, timeout
1308 * in case the desired status bits are never set.
1309 *
1310 * These PIO loops initially start out with short delays between
1311 * each iteration in the expectation that the required condition
1312 * is usually met quickly, so it can be handled immediately. After
1313 * about 1 ms, stepping is increased to achieve a better timing
1314 * accuracy in the calls to DELAY().
1315 */
1316static int
1317fd_in(struct fdc_data *fdc, int *ptr)
1318{
1319 int i, j, step;
1320
1321 for (j = 0, step = 1;
1322 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1323 j < FDSTS_TIMEOUT;
1324 j += step) {
1325 if (i == NE7_RQM)
1326 return (fdc_err(fdc, "ready for output in input\n"));
1327 if (j == 1000)
1328 step = 1000;
1329 DELAY(step);
1330 }
1331 if (j >= FDSTS_TIMEOUT)
1332 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1333#ifdef FDC_DEBUG
1334 i = fddata_rd(fdc);
1335 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1336 *ptr = i;
1337 return (0);
1338#else /* !FDC_DEBUG */
1339 i = fddata_rd(fdc);
1340 if (ptr)
1341 *ptr = i;
1342 return (0);
1343#endif /* FDC_DEBUG */
1344}
1345
1346static int
1347out_fdc(struct fdc_data *fdc, int x)
1348{
1349 int i, j, step;
1350
1351 for (j = 0, step = 1;
1352 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1353 j < FDSTS_TIMEOUT;
1354 j += step) {
1355 if (i == (NE7_DIO|NE7_RQM))
1356 return (fdc_err(fdc, "ready for input in output\n"));
1357 if (j == 1000)
1358 step = 1000;
1359 DELAY(step);
1360 }
1361 if (j >= FDSTS_TIMEOUT)
1362 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1363
1364 /* Send the command and return */
1365 fddata_wr(fdc, x);
1366 TRACE1("[0x%x->FDDATA]", x);
1367 return (0);
1368}
1369
1370/****************************************************************************/
1371/* fdopen/fdclose */
1372/****************************************************************************/
1373int
1374Fdopen(dev_t dev, int flags, int mode, struct proc *p)
1375{
1376 fdu_t fdu = FDUNIT(minor(dev));
1377 int type = FDTYPE(minor(dev));
1378 fd_p fd;
1379 fdc_p fdc;
1380
1381 /* check bounds */
1382 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1383 return (ENXIO);
1384 fdc = fd->fdc;
1385 if ((fdc == NULL) || (fd->type == NO_TYPE))
1386 return (ENXIO);
1387 if (type > NUMDENS)
1388 return (ENXIO);
1389 if (type == 0)
1390 type = fd->type;
1391 else {
1392 /*
1393 * For each type of basic drive, make sure we are trying
1394 * to open a type it can do,
1395 */
1396 if (type != fd->type) {
1397 switch (fd->type) {
1398 case FD_360:
1399 return (ENXIO);
1400 case FD_720:
1401 if ( type != FD_820
1402 && type != FD_800
1403 && type != FD_640
1404 )
1405 return (ENXIO);
1406 break;
1407 case FD_1200:
1408 switch (type) {
1409 case FD_1480:
1410 type = FD_1480in5_25;
1411 break;
1412 case FD_1440:
1413 type = FD_1440in5_25;
1414 break;
1415 case FD_1232:
1416 break;
1417 case FD_820:
1418 type = FD_820in5_25;
1419 break;
1420 case FD_800:
1421 type = FD_800in5_25;
1422 break;
1423 case FD_720:
1424 type = FD_720in5_25;
1425 break;
1426 case FD_640:
1427 type = FD_640in5_25;
1428 break;
1429 case FD_360:
1430 type = FD_360in5_25;
1431 break;
1432 default:
1433 return(ENXIO);
1434 }
1435 break;
1436 case FD_1440:
1437 if ( type != FD_1720
1438 && type != FD_1480
1439 && type != FD_1200
1440 && type != FD_820
1441 && type != FD_800
1442 && type != FD_720
1443 && type != FD_640
1444 )
1445 return(ENXIO);
1446 break;
1447 }
1448 }
1449 }
1450 fd->ft = fd_types + type - 1;
1451 fd->flags |= FD_OPEN;
1452 /*
1453 * Clearing the DMA overrun counter at open time is a bit messy.
1454 * Since we're only managing one counter per controller, opening
1455 * the second drive could mess it up. Anyway, if the DMA overrun
1456 * condition is really persistent, it will eventually time out
1457 * still. OTOH, clearing it here will ensure we'll at least start
1458 * trying again after a previous (maybe even long ago) failure.
1459 * Also, this is merely a stop-gap measure only that should not
1460 * happen during normal operation, so we can tolerate it to be a
1461 * bit sloppy about this.
1462 */
1463 fdc->dma_overruns = 0;
1464
1465 return 0;
1466}
1467
1468int
1469fdclose(dev_t dev, int flags, int mode, struct proc *p)
1470{
1471 fdu_t fdu = FDUNIT(minor(dev));
1472 struct fd_data *fd;
1473
1474 fd = devclass_get_softc(fd_devclass, fdu);
1475 fd->flags &= ~FD_OPEN;
1476 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1477
1478 return (0);
1479}
1480
1481/****************************************************************************/
1482/* fdstrategy */
1483/****************************************************************************/
1484void
1485fdstrategy(struct buf *bp)
1486{
1487 unsigned nblocks, blknum, cando;
1488 int s;
1489 fdu_t fdu;
1490 fdc_p fdc;
1491 fd_p fd;
1492 size_t fdblk;
1493
1494 fdu = FDUNIT(minor(bp->b_dev));
1495 fd = devclass_get_softc(fd_devclass, fdu);
1496 if (fd == 0)
1497 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1498 (u_long)major(bp->b_dev), (u_long)minor(bp->b_dev));
1499 fdc = fd->fdc;
1500 if (fd->type == NO_TYPE) {
1501 bp->b_error = ENXIO;
1502 bp->b_flags |= B_ERROR;
1503 goto bad;
1504 };
1505
1506 fdblk = 128 << (fd->ft->secsize);
1507 if (!(bp->b_flags & B_FORMAT)) {
1508 if (bp->b_blkno < 0) {
1509 printf(
1510 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
1511 fdu, (u_long)bp->b_blkno, bp->b_bcount);
1512 bp->b_error = EINVAL;
1513 bp->b_flags |= B_ERROR;
1514 goto bad;
1515 }
1516 if ((bp->b_bcount % fdblk) != 0) {
1517 bp->b_error = EINVAL;
1518 bp->b_flags |= B_ERROR;
1519 goto bad;
1520 }
1521 }
1522
1523 /*
1524 * Set up block calculations.
1525 */
1526 if (bp->b_blkno > 20000000) {
1527 /*
1528 * Reject unreasonably high block number, prevent the
1529 * multiplication below from overflowing.
1530 */
1531 bp->b_error = EINVAL;
1532 bp->b_flags |= B_ERROR;
1533 goto bad;
1534 }
1535 blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk;
1536 nblocks = fd->ft->size;
1537 bp->b_resid = 0;
1538 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1539 if (blknum <= nblocks) {
1540 cando = (nblocks - blknum) * fdblk;
1541 bp->b_resid = bp->b_bcount - cando;
1542 if (cando == 0)
1543 goto bad; /* not actually bad but EOF */
1544 } else {
1545 bp->b_error = EINVAL;
1546 bp->b_flags |= B_ERROR;
1547 goto bad;
1548 }
1549 }
1550 bp->b_pblkno = bp->b_blkno;
1551 s = splbio();
1552 bufqdisksort(&fdc->head, bp);
1553 untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */
1554
1555 /* Tell devstat we are starting on the transaction */
1556 devstat_start_transaction(&fd->device_stats);
1557 device_busy(fd->dev);
1558
1559 fdstart(fdc);
1560 splx(s);
1561 return;
1562
1563bad:
1564 biodone(bp);
1565}
1566
1567/***************************************************************\
1568* fdstart *
1569* We have just queued something.. if the controller is not busy *
1570* then simulate the case where it has just finished a command *
1571* So that it (the interrupt routine) looks on the queue for more*
1572* work to do and picks up what we just added. *
1573* If the controller is already busy, we need do nothing, as it *
1574* will pick up our work when the present work completes *
1575\***************************************************************/
1576static void
1577fdstart(struct fdc_data *fdc)
1578{
1579 int s;
1580
1581 s = splbio();
1582 if(fdc->state == DEVIDLE)
1583 {
1584 fdc_intr(fdc);
1585 }
1586 splx(s);
1587}
1588
1589static void
1590fd_iotimeout(void *xfdc)
1591{
1592 fdc_p fdc;
1593 int s;
1594
1595 fdc = xfdc;
1596 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1597
1598 /*
1599 * Due to IBM's brain-dead design, the FDC has a faked ready
1600 * signal, hardwired to ready == true. Thus, any command
1601 * issued if there's no diskette in the drive will _never_
1602 * complete, and must be aborted by resetting the FDC.
1603 * Many thanks, Big Blue!
1604 * The FDC must not be reset directly, since that would
1605 * interfere with the state machine. Instead, pretend that
1606 * the command completed but was invalid. The state machine
1607 * will reset the FDC and retry once.
1608 */
1609 s = splbio();
1610 fdc->status[0] = NE7_ST0_IC_IV;
1611 fdc->flags &= ~FDC_STAT_VALID;
1612 fdc->state = IOTIMEDOUT;
1613 fdc_intr(fdc);
1614 splx(s);
1615}
1616
1617/* just ensure it has the right spl */
1618static void
1619fd_pseudointr(void *xfdc)
1620{
1621 int s;
1622
1623 s = splbio();
1624 fdc_intr(xfdc);
1625 splx(s);
1626}
1627
1628/***********************************************************************\
1629* fdintr *
1630* keep calling the state machine until it returns a 0 *
1631* ALWAYS called at SPLBIO *
1632\***********************************************************************/
1633static void
1634fdc_intr(void *xfdc)
1635{
1636 fdc_p fdc = xfdc;
1637 while(fdstate(fdc))
1638 ;
1639}
1640
1641/*
1642 * magic pseudo-DMA initialization for YE FDC. Sets count and
1643 * direction
1644 */
1645#define SET_BCDR(fdc,wr,cnt,port) \
1646 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1647 ((cnt)-1) & 0xff); \
1648 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1649 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1650
1651/*
1652 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1653 */
1654static int fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count)
1655{
1656 u_char *cptr = (u_char *)addr;
1657
1658 if (flags & B_READ) {
1659 if (fdc->state != PIOREAD) {
1660 fdc->state = PIOREAD;
1661 return(0);
1662 };
1663 SET_BCDR(fdc, 0, count, 0);
1664 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1665 FDC_YE_DATAPORT, cptr, count);
1666 } else {
1667 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1668 FDC_YE_DATAPORT, cptr, count);
1669 SET_BCDR(fdc, 0, count, 0);
1670 };
1671 return(1);
1672}
1673
1674/***********************************************************************\
1675* The controller state machine. *
1676* if it returns a non zero value, it should be called again immediatly *
1677\***********************************************************************/
1678static int
1679fdstate(fdc_p fdc)
1680{
1681 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1682 unsigned blknum = 0, b_cylinder = 0;
1683 fdu_t fdu = fdc->fdu;
1684 fd_p fd;
1685 register struct buf *bp;
1686 struct fd_formb *finfo = NULL;
1687 size_t fdblk;
1688
1689 bp = fdc->bp;
1690 if (bp == NULL) {
1691 bp = bufq_first(&fdc->head);
1692 if (bp != NULL) {
1693 bufq_remove(&fdc->head, bp);
1694 fdc->bp = bp;
1695 }
1696 }
1697 if (bp == NULL) {
1698 /***********************************************\
1699 * nothing left for this controller to do *
1700 * Force into the IDLE state, *
1701 \***********************************************/
1702 fdc->state = DEVIDLE;
1703 if (fdc->fd) {
1704 device_printf(fdc->fdc_dev,
1705 "unexpected valid fd pointer\n");
1706 fdc->fd = (fd_p) 0;
1707 fdc->fdu = -1;
1708 }
1709 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1710 return (0);
1711 }
1712 fdu = FDUNIT(minor(bp->b_dev));
1713 fd = devclass_get_softc(fd_devclass, fdu);
1714 fdblk = 128 << fd->ft->secsize;
1715 if (fdc->fd && (fd != fdc->fd))
1716 device_printf(fd->dev, "confused fd pointers\n");
1717 read = bp->b_flags & B_READ;
1718 format = bp->b_flags & B_FORMAT;
1719 if (format) {
1720 finfo = (struct fd_formb *)bp->b_data;
1721 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1722 - (char *)finfo;
1723 }
1724 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1725 blknum = (unsigned) bp->b_pblkno * DEV_BSIZE/fdblk +
1726 fd->skip/fdblk;
1727 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1728 }
1729 TRACE1("fd%d", fdu);
1730 TRACE1("[%s]", fdstates[fdc->state]);
1731 TRACE1("(0x%x)", fd->flags);
1732 untimeout(fd_turnoff, fd, fd->toffhandle);
1733 fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz);
1734 switch (fdc->state)
1735 {
1736 case DEVIDLE:
1737 case FINDWORK: /* we have found new work */
1738 fdc->retry = 0;
1739 fd->skip = 0;
1740 fdc->fd = fd;
1741 fdc->fdu = fdu;
1742 fdc->fdctl_wr(fdc, fd->ft->trans);
1743 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1744 /*******************************************************\
1745 * If the next drive has a motor startup pending, then *
1746 * it will start up in its own good time *
1747 \*******************************************************/
1748 if(fd->flags & FD_MOTOR_WAIT) {
1749 fdc->state = MOTORWAIT;
1750 return (0); /* come back later */
1751 }
1752 /*******************************************************\
1753 * Maybe if it's not starting, it SHOULD be starting *
1754 \*******************************************************/
1755 if (!(fd->flags & FD_MOTOR))
1756 {
1757 fdc->state = MOTORWAIT;
1758 fd_turnon(fd);
1759 return (0);
1760 }
1761 else /* at least make sure we are selected */
1762 {
1763 set_motor(fdc, fd->fdsu, TURNON);
1764 }
1765 if (fdc->flags & FDC_NEEDS_RESET) {
1766 fdc->state = RESETCTLR;
1767 fdc->flags &= ~FDC_NEEDS_RESET;
1768 } else
1769 fdc->state = DOSEEK;
1770 break;
1771 case DOSEEK:
1772 if (b_cylinder == (unsigned)fd->track)
1773 {
1774 fdc->state = SEEKCOMPLETE;
1775 break;
1776 }
1777 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1778 fd->fdsu, b_cylinder * fd->ft->steptrac,
1779 0))
1780 {
1781 /*
1782 * seek command not accepted, looks like
1783 * the FDC went off to the Saints...
1784 */
1785 fdc->retry = 6; /* try a reset */
1786 return(retrier(fdc));
1787 }
1788 fd->track = FD_NO_TRACK;
1789 fdc->state = SEEKWAIT;
1790 return(0); /* will return later */
1791 case SEEKWAIT:
1792 /* allow heads to settle */
1793 timeout(fd_pseudointr, fdc, hz / 16);
1794 fdc->state = SEEKCOMPLETE;
1795 return(0); /* will return later */
1796 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1797 /* Make sure seek really happened*/
1798 if(fd->track == FD_NO_TRACK) {
1799 int descyl = b_cylinder * fd->ft->steptrac;
1800 do {
1801 /*
1802 * This might be a "ready changed" interrupt,
1803 * which cannot really happen since the
1804 * RDY pin is hardwired to + 5 volts. This
1805 * generally indicates a "bouncing" intr
1806 * line, so do one of the following:
1807 *
1808 * When running on an enhanced FDC that is
1809 * known to not go stuck after responding
1810 * with INVALID, fetch all interrupt states
1811 * until seeing either an INVALID or a
1812 * real interrupt condition.
1813 *
1814 * When running on a dumb old NE765, give
1815 * up immediately. The controller will
1816 * provide up to four dummy RC interrupt
1817 * conditions right after reset (for the
1818 * corresponding four drives), so this is
1819 * our only chance to get notice that it
1820 * was not the FDC that caused the interrupt.
1821 */
1822 if (fd_sense_int(fdc, &st0, &cyl)
1823 == FD_NOT_VALID)
1824 return 0;
1825 if(fdc->fdct == FDC_NE765
1826 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1827 return 0; /* hope for a real intr */
1828 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1829
1830 if (0 == descyl) {
1831 int failed = 0;
1832 /*
1833 * seek to cyl 0 requested; make sure we are
1834 * really there
1835 */
1836 if (fd_sense_drive_status(fdc, &st3))
1837 failed = 1;
1838 if ((st3 & NE7_ST3_T0) == 0) {
1839 printf(
1840 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1841 fdu, st3, NE7_ST3BITS);
1842 failed = 1;
1843 }
1844
1845 if (failed) {
1846 if(fdc->retry < 3)
1847 fdc->retry = 3;
1848 return (retrier(fdc));
1849 }
1850 }
1851
1852 if (cyl != descyl) {
1853 printf(
1854 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1855 fdu, descyl, cyl, st0);
1856 if (fdc->retry < 3)
1857 fdc->retry = 3;
1858 return (retrier(fdc));
1859 }
1860 }
1861
1862 fd->track = b_cylinder;
1863 if (!(fdc->flags & FDC_NODMA))
1864 isa_dmastart(bp->b_flags, bp->b_data+fd->skip,
1865 format ? bp->b_bcount : fdblk, fdc->dmachan);
1866 sectrac = fd->ft->sectrac;
1867 sec = blknum % (sectrac * fd->ft->heads);
1868 head = sec / sectrac;
1869 sec = sec % sectrac + 1;
1870 fd->hddrv = ((head&1)<<2)+fdu;
1871
1872 if(format || !read)
1873 {
1874 /* make sure the drive is writable */
1875 if(fd_sense_drive_status(fdc, &st3) != 0)
1876 {
1877 /* stuck controller? */
1878 if (!(fdc->flags & FDC_NODMA))
1879 isa_dmadone(bp->b_flags,
1880 bp->b_data + fd->skip,
1881 format ? bp->b_bcount : fdblk,
1882 fdc->dmachan);
1883 fdc->retry = 6; /* reset the beast */
1884 return (retrier(fdc));
1885 }
1886 if(st3 & NE7_ST3_WP)
1887 {
1888 /*
1889 * XXX YES! this is ugly.
1890 * in order to force the current operation
1891 * to fail, we will have to fake an FDC
1892 * error - all error handling is done
1893 * by the retrier()
1894 */
1895 fdc->status[0] = NE7_ST0_IC_AT;
1896 fdc->status[1] = NE7_ST1_NW;
1897 fdc->status[2] = 0;
1898 fdc->status[3] = fd->track;
1899 fdc->status[4] = head;
1900 fdc->status[5] = sec;
1901 fdc->retry = 8; /* break out immediately */
1902 fdc->state = IOTIMEDOUT; /* not really... */
1903 return (1);
1904 }
1905 }
1906
1907 if (format) {
1908 if (fdc->flags & FDC_NODMA) {
1909 /*
1910 * This seems to be necessary for
1911 * whatever obscure reason; if we omit
1912 * it, we end up filling the sector ID
1913 * fields of the newly formatted track
1914 * entirely with garbage, causing
1915 * `wrong cylinder' errors all over
1916 * the place when trying to read them
1917 * back.
1918 *
1919 * Umpf.
1920 */
1921 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1922
1923 (void)fdcpio(fdc,bp->b_flags,
1924 bp->b_data+fd->skip,
1925 bp->b_bcount);
1926
1927 }
1928 /* formatting */
1929 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1930 finfo->fd_formb_secshift,
1931 finfo->fd_formb_nsecs,
1932 finfo->fd_formb_gaplen,
1933 finfo->fd_formb_fillbyte, 0)) {
1934 /* controller fell over */
1935 if (!(fdc->flags & FDC_NODMA))
1936 isa_dmadone(bp->b_flags,
1937 bp->b_data + fd->skip,
1938 format ? bp->b_bcount : fdblk,
1939 fdc->dmachan);
1940 fdc->retry = 6;
1941 return (retrier(fdc));
1942 }
1943 } else {
1944 if (fdc->flags & FDC_NODMA) {
1945 /*
1946 * this seems to be necessary even when
1947 * reading data
1948 */
1949 SET_BCDR(fdc, 1, fdblk, 0);
1950
1951 /*
1952 * perform the write pseudo-DMA before
1953 * the WRITE command is sent
1954 */
1955 if (!read)
1956 (void)fdcpio(fdc,bp->b_flags,
1957 bp->b_data+fd->skip,
1958 fdblk);
1959 }
1960 if (fd_cmd(fdc, 9,
1961 (read ? NE7CMD_READ : NE7CMD_WRITE),
1962 head << 2 | fdu, /* head & unit */
1963 fd->track, /* track */
1964 head,
1965 sec, /* sector + 1 */
1966 fd->ft->secsize, /* sector size */
1967 sectrac, /* sectors/track */
1968 fd->ft->gap, /* gap size */
1969 fd->ft->datalen, /* data length */
1970 0)) {
1971 /* the beast is sleeping again */
1972 if (!(fdc->flags & FDC_NODMA))
1973 isa_dmadone(bp->b_flags,
1974 bp->b_data + fd->skip,
1975 format ? bp->b_bcount : fdblk,
1976 fdc->dmachan);
1977 fdc->retry = 6;
1978 return (retrier(fdc));
1979 }
1980 }
1981 if (fdc->flags & FDC_NODMA)
1982 /*
1983 * if this is a read, then simply await interrupt
1984 * before performing PIO
1985 */
1986 if (read && !fdcpio(fdc,bp->b_flags,
1987 bp->b_data+fd->skip,fdblk)) {
1988 fd->tohandle = timeout(fd_iotimeout, fdc, hz);
1989 return(0); /* will return later */
1990 };
1991
1992 /*
1993 * write (or format) operation will fall through and
1994 * await completion interrupt
1995 */
1996 fdc->state = IOCOMPLETE;
1997 fd->tohandle = timeout(fd_iotimeout, fdc, hz);
1998 return (0); /* will return later */
1999 case PIOREAD:
2000 /*
2001 * actually perform the PIO read. The IOCOMPLETE case
2002 * removes the timeout for us.
2003 */
2004 (void)fdcpio(fdc,bp->b_flags,bp->b_data+fd->skip,fdblk);
2005 fdc->state = IOCOMPLETE;
2006 /* FALLTHROUGH */
2007 case IOCOMPLETE: /* IO DONE, post-analyze */
2008 untimeout(fd_iotimeout, fdc, fd->tohandle);
2009
2010 if (fd_read_status(fdc, fd->fdsu)) {
2011 if (!(fdc->flags & FDC_NODMA))
2012 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
2013 format ? bp->b_bcount : fdblk,
2014 fdc->dmachan);
2015 if (fdc->retry < 6)
2016 fdc->retry = 6; /* force a reset */
2017 return (retrier(fdc));
2018 }
2019
2020 fdc->state = IOTIMEDOUT;
2021
2022 /* FALLTHROUGH */
2023
2024 case IOTIMEDOUT:
2025 if (!(fdc->flags & FDC_NODMA))
2026 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
2027 format ? bp->b_bcount : fdblk, fdc->dmachan);
2028 if (fdc->status[0] & NE7_ST0_IC) {
2029 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2030 && fdc->status[1] & NE7_ST1_OR) {
2031 /*
2032 * DMA overrun. Someone hogged the bus and
2033 * didn't release it in time for the next
2034 * FDC transfer.
2035 *
2036 * We normally restart this without bumping
2037 * the retry counter. However, in case
2038 * something is seriously messed up (like
2039 * broken hardware), we rather limit the
2040 * number of retries so the IO operation
2041 * doesn't block indefinately.
2042 */
2043 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
2044 fdc->state = SEEKCOMPLETE;
2045 return (1);
2046 } /* else fall through */
2047 }
2048 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
2049 && fdc->retry < 6)
2050 fdc->retry = 6; /* force a reset */
2051 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2052 && fdc->status[2] & NE7_ST2_WC
2053 && fdc->retry < 3)
2054 fdc->retry = 3; /* force recalibrate */
2055 return (retrier(fdc));
2056 }
2057 /* All OK */
2058 /* Operation successful, retry DMA overruns again next time. */
2059 fdc->dma_overruns = 0;
2060 fd->skip += fdblk;
2061 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
2062 /* set up next transfer */
2063 fdc->state = DOSEEK;
2064 } else {
2065 /* ALL DONE */
2066 fd->skip = 0;
2067 fdc->bp = NULL;
2068 device_unbusy(fd->dev);
2069 devstat_end_transaction_buf(&fd->device_stats, bp);
2070 biodone(bp);
2071 fdc->fd = (fd_p) 0;
2072 fdc->fdu = -1;
2073 fdc->state = FINDWORK;
2074 }
2075 return (1);
2076 case RESETCTLR:
2077 fdc_reset(fdc);
2078 fdc->retry++;
2079 fdc->state = RESETCOMPLETE;
2080 return (0);
2081 case RESETCOMPLETE:
2082 /*
2083 * Discard all the results from the reset so that they
2084 * can't cause an unexpected interrupt later.
2085 */
2086 for (i = 0; i < 4; i++)
2087 (void)fd_sense_int(fdc, &st0, &cyl);
2088 fdc->state = STARTRECAL;
2089 /* Fall through. */
2090 case STARTRECAL:
2091 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
2092 /* arrgl */
2093 fdc->retry = 6;
2094 return (retrier(fdc));
2095 }
2096 fdc->state = RECALWAIT;
2097 return (0); /* will return later */
2098 case RECALWAIT:
2099 /* allow heads to settle */
2100 timeout(fd_pseudointr, fdc, hz / 8);
2101 fdc->state = RECALCOMPLETE;
2102 return (0); /* will return later */
2103 case RECALCOMPLETE:
2104 do {
2105 /*
2106 * See SEEKCOMPLETE for a comment on this:
2107 */
2108 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2109 return 0;
2110 if(fdc->fdct == FDC_NE765
2111 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2112 return 0; /* hope for a real intr */
2113 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2114 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2115 {
2116 if(fdc->retry > 3)
2117 /*
2118 * a recalibrate from beyond cylinder 77
2119 * will "fail" due to the FDC limitations;
2120 * since people used to complain much about
2121 * the failure message, try not logging
2122 * this one if it seems to be the first
2123 * time in a line
2124 */
2125 printf("fd%d: recal failed ST0 %b cyl %d\n",
2126 fdu, st0, NE7_ST0BITS, cyl);
2127 if(fdc->retry < 3) fdc->retry = 3;
2128 return (retrier(fdc));
2129 }
2130 fd->track = 0;
2131 /* Seek (probably) necessary */
2132 fdc->state = DOSEEK;
2133 return (1); /* will return immediatly */
2134 case MOTORWAIT:
2135 if(fd->flags & FD_MOTOR_WAIT)
2136 {
2137 return (0); /* time's not up yet */
2138 }
2139 if (fdc->flags & FDC_NEEDS_RESET) {
2140 fdc->state = RESETCTLR;
2141 fdc->flags &= ~FDC_NEEDS_RESET;
2142 } else {
2143 /*
2144 * If all motors were off, then the controller was
2145 * reset, so it has lost track of the current
2146 * cylinder. Recalibrate to handle this case.
2147 * But first, discard the results of the reset.
2148 */
2149 fdc->state = RESETCOMPLETE;
2150 }
2151 return (1); /* will return immediatly */
2152 default:
2153 device_printf(fdc->fdc_dev, "unexpected FD int->");
2154 if (fd_read_status(fdc, fd->fdsu) == 0)
2155 printf("FDC status :%x %x %x %x %x %x %x ",
2156 fdc->status[0],
2157 fdc->status[1],
2158 fdc->status[2],
2159 fdc->status[3],
2160 fdc->status[4],
2161 fdc->status[5],
2162 fdc->status[6] );
2163 else
2164 printf("No status available ");
2165 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2166 {
2167 printf("[controller is dead now]\n");
2168 return (0);
2169 }
2170 printf("ST0 = %x, PCN = %x\n", st0, cyl);
2171 return (0);
2172 }
2173 /*XXX confusing: some branches return immediately, others end up here*/
2174 return (1); /* Come back immediatly to new state */
2175}
2176
2177static int
2178retrier(struct fdc_data *fdc)
2179{
2180 register struct buf *bp;
2181 struct fd_data *fd;
2182 int fdu;
2183
2184 bp = fdc->bp;
2185
2186 /* XXX shouldn't this be cached somewhere? */
2187 fdu = FDUNIT(minor(bp->b_dev));
2188 fd = devclass_get_softc(fd_devclass, fdu);
2189 if (fd->options & FDOPT_NORETRY)
2190 goto fail;
2191
2192 switch (fdc->retry) {
2193 case 0: case 1: case 2:
2194 fdc->state = SEEKCOMPLETE;
2195 break;
2196 case 3: case 4: case 5:
2197 fdc->state = STARTRECAL;
2198 break;
2199 case 6:
2200 fdc->state = RESETCTLR;
2201 break;
2202 case 7:
2203 break;
2204 default:
2205 fail:
2206 {
2207 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2208 dev_t sav_b_dev = bp->b_dev;
2209
2210 /* Trick diskerr */
2211 bp->b_dev = makedev(major(bp->b_dev),
2212 (FDUNIT(minor(bp->b_dev))<<3)|RAW_PART);
2213 if (printerror)
2214 diskerr(bp, "hard error", LOG_PRINTF,
2215 fdc->fd->skip / DEV_BSIZE,
2216 (struct disklabel *)NULL);
2217 bp->b_dev = sav_b_dev;
2218 if (printerror) {
2219 if (fdc->flags & FDC_STAT_VALID)
2220 printf(
2221 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2222 fdc->status[0], NE7_ST0BITS,
2223 fdc->status[1], NE7_ST1BITS,
2224 fdc->status[2], NE7_ST2BITS,
2225 fdc->status[3], fdc->status[4],
2226 fdc->status[5]);
2227 else
2228 printf(" (No status)\n");
2229 }
2230 }
2231 bp->b_flags |= B_ERROR;
2232 bp->b_error = EIO;
2233 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2234 fdc->bp = NULL;
2235 fdc->fd->skip = 0;
2236 device_unbusy(fd->dev);
2237 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2238 biodone(bp);
2239 fdc->state = FINDWORK;
2240 fdc->flags |= FDC_NEEDS_RESET;
2241 fdc->fd = (fd_p) 0;
2242 fdc->fdu = -1;
2243 return (1);
2244 }
2245 fdc->retry++;
2246 return (1);
2247}
2248
2249static int
2250fdformat(dev, finfo, p)
2251 dev_t dev;
2252 struct fd_formb *finfo;
2253 struct proc *p;
2254{
2255 fdu_t fdu;
2256 fd_p fd;
2257
2258 struct buf *bp;
2259 int rv = 0, s;
2260 size_t fdblk;
2261
2262 fdu = FDUNIT(minor(dev));
2263 fd = devclass_get_softc(fd_devclass, fdu);
2264 fdblk = 128 << fd->ft->secsize;
2265
2266 /* set up a buffer header for fdstrategy() */
2267 bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT);
2268 if(bp == 0)
2269 return ENOBUFS;
2270 /*
2271 * keep the process from being swapped
2272 */
2273 PHOLD(p);
2274 bzero((void *)bp, sizeof(struct buf));
2275 BUF_LOCKINIT(bp);
2276 BUF_LOCK(bp, LK_EXCLUSIVE);
2277 bp->b_flags = B_PHYS | B_FORMAT;
2278
2279 /*
2280 * calculate a fake blkno, so fdstrategy() would initiate a
2281 * seek to the requested cylinder
2282 */
2283 bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
2284 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
2285
2286 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2287 bp->b_data = (caddr_t)finfo;
2288
2289 /* now do the format */
2290 bp->b_dev = dev;
2291 BUF_STRATEGY(bp, 0);
2292
2293 /* ...and wait for it to complete */
2294 s = splbio();
2295 while(!(bp->b_flags & B_DONE)) {
2296 rv = tsleep((caddr_t)bp, PRIBIO, "fdform", 20 * hz);
2297 if (rv == EWOULDBLOCK)
2298 break;
2299 }
2300 splx(s);
2301
2302 if (rv == EWOULDBLOCK) {
2303 /* timed out */
2304 rv = EIO;
2305 device_unbusy(fd->dev);
2306 biodone(bp);
2307 }
2308 if (bp->b_flags & B_ERROR)
2309 rv = bp->b_error;
2310 /*
2311 * allow the process to be swapped
2312 */
2313 PRELE(p);
2314 BUF_UNLOCK(bp);
2315 BUF_LOCKFREE(bp);
2316 free(bp, M_TEMP);
2317 return rv;
2318}
2319
2320/*
2321 * TODO: don't allocate buffer on stack.
2322 */
2323
2324static int
2325fdioctl(dev, cmd, addr, flag, p)
2326 dev_t dev;
2327 u_long cmd;
2328 caddr_t addr;
2329 int flag;
2330 struct proc *p;
2331{
2332 fdu_t fdu = FDUNIT(minor(dev));
2333 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2334 size_t fdblk;
2335
2336 struct fd_type *fdt;
2337 struct disklabel *dl;
2338 struct fdc_status *fsp;
2339 char buffer[DEV_BSIZE];
2340 int error = 0;
2341
2342 fdblk = 128 << fd->ft->secsize;
2343
2344 switch (cmd) {
2345 case DIOCGDINFO:
2346 bzero(buffer, sizeof (buffer));
2347 dl = (struct disklabel *)buffer;
2348 dl->d_secsize = fdblk;
2349 fdt = fd->ft;
2350 dl->d_secpercyl = fdt->size / fdt->tracks;
2351 dl->d_type = DTYPE_FLOPPY;
2352
2353 if (readdisklabel(dev, dl)
2354 == NULL)
2355 error = 0;
2356 else
2357 error = EINVAL;
2358
2359 *(struct disklabel *)addr = *dl;
2360 break;
2361
2362 case DIOCSDINFO:
2363 if ((flag & FWRITE) == 0)
2364 error = EBADF;
2365 break;
2366
2367 case DIOCWLABEL:
2368 if ((flag & FWRITE) == 0)
2369 error = EBADF;
2370 break;
2371
2372 case DIOCWDINFO:
2373 if ((flag & FWRITE) == 0) {
2374 error = EBADF;
2375 break;
2376 }
2377
2378 dl = (struct disklabel *)addr;
2379
2380 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2381 (u_long)0)) != 0)
2382 break;
2383
2384 error = writedisklabel(dev, (struct disklabel *)buffer);
2385 break;
2386 case FD_FORM:
2387 if ((flag & FWRITE) == 0)
2388 error = EBADF; /* must be opened for writing */
2389 else if (((struct fd_formb *)addr)->format_version !=
2390 FD_FORMAT_VERSION)
2391 error = EINVAL; /* wrong version of formatting prog */
2392 else
2393 error = fdformat(dev, (struct fd_formb *)addr, p);
2394 break;
2395
2396 case FD_GTYPE: /* get drive type */
2397 *(struct fd_type *)addr = *fd->ft;
2398 break;
2399
2400 case FD_STYPE: /* set drive type */
2401 /* this is considered harmful; only allow for superuser */
2402 if (suser(p) != 0)
2403 return EPERM;
2404 *fd->ft = *(struct fd_type *)addr;
2405 break;
2406
2407 case FD_GOPTS: /* get drive options */
2408 *(int *)addr = fd->options;
2409 break;
2410
2411 case FD_SOPTS: /* set drive options */
2412 fd->options = *(int *)addr;
2413 break;
2414
2415 case FD_GSTAT:
2416 fsp = (struct fdc_status *)addr;
2417 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2418 return EINVAL;
2419 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2420 break;
2421
2422 default:
2423 error = ENOTTY;
2424 break;
2425 }
2426 return (error);
2427}
2428
2429/*
2430 * Hello emacs, these are the
2431 * Local Variables:
2432 * c-indent-level: 8
2433 * c-continued-statement-offset: 8
2434 * c-continued-brace-offset: 0
2435 * c-brace-offset: -8
2436 * c-brace-imaginary-offset: 0
2437 * c-argdecl-indent: 8
2438 * c-label-offset: -8
2439 * c++-hanging-braces: 1
2440 * c++-access-specifier-offset: -8
2441 * c++-empty-arglist-indent: 8
2442 * c++-friend-offset: 0
2443 * End:
2444 */