FreeBSD/Linux Kernel Cross Reference
sys/dev/fdc/fdc.c
1 /*-
2 * Copyright (c) 2004 Poul-Henning Kamp
3 * Copyright (c) 1990 The Regents of the University of California.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Don Ahn.
8 *
9 * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu)
10 * aided by the Linux floppy driver modifications from David Bateman
11 * (dbateman@eng.uts.edu.au).
12 *
13 * Copyright (c) 1993, 1994 by
14 * jc@irbs.UUCP (John Capo)
15 * vak@zebub.msk.su (Serge Vakulenko)
16 * ache@astral.msk.su (Andrew A. Chernov)
17 *
18 * Copyright (c) 1993, 1994, 1995 by
19 * joerg_wunsch@uriah.sax.de (Joerg Wunsch)
20 * dufault@hda.com (Peter Dufault)
21 *
22 * Copyright (c) 2001 Joerg Wunsch,
23 * joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
24 *
25 * Redistribution and use in source and binary forms, with or without
26 * modification, are permitted provided that the following conditions
27 * are met:
28 * 1. Redistributions of source code must retain the above copyright
29 * notice, this list of conditions and the following disclaimer.
30 * 2. Redistributions in binary form must reproduce the above copyright
31 * notice, this list of conditions and the following disclaimer in the
32 * documentation and/or other materials provided with the distribution.
33 * 4. Neither the name of the University nor the names of its contributors
34 * may be used to endorse or promote products derived from this software
35 * without specific prior written permission.
36 *
37 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
38 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
40 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
41 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
42 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
43 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
45 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
46 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47 * SUCH DAMAGE.
48 *
49 * from: @(#)fd.c 7.4 (Berkeley) 5/25/91
50 *
51 */
52
53 #include <sys/cdefs.h>
54 __FBSDID("$FreeBSD: releng/6.1/sys/dev/fdc/fdc.c 156394 2006-03-07 15:50:25Z jhb $");
55
56 #include "opt_fdc.h"
57
58 #include <sys/param.h>
59 #include <sys/bio.h>
60 #include <sys/bus.h>
61 #include <sys/devicestat.h>
62 #include <sys/disk.h>
63 #include <sys/fcntl.h>
64 #include <sys/fdcio.h>
65 #include <sys/filio.h>
66 #include <sys/kernel.h>
67 #include <sys/kthread.h>
68 #include <sys/lock.h>
69 #include <sys/malloc.h>
70 #include <sys/module.h>
71 #include <sys/mutex.h>
72 #include <sys/proc.h>
73 #include <sys/rman.h>
74 #include <sys/sysctl.h>
75 #include <sys/systm.h>
76
77 #include <geom/geom.h>
78
79 #include <machine/bus.h>
80 #include <machine/clock.h>
81 #include <machine/stdarg.h>
82
83 #include <isa/isavar.h>
84 #include <isa/isareg.h>
85 #include <dev/fdc/fdcvar.h>
86 #include <isa/rtc.h>
87
88 #include <dev/ic/nec765.h>
89
90 /*
91 * Runtime configuration hints/flags
92 */
93
94 /* configuration flags for fd */
95 #define FD_TYPEMASK 0x0f /* drive type, matches enum
96 * fd_drivetype; on i386 machines, if
97 * given as 0, use RTC type for fd0
98 * and fd1 */
99 #define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just
100 * assume it is there */
101
102 /*
103 * Things that could conceiveably considered parameters or tweakables
104 */
105
106 /*
107 * Maximal number of bytes in a cylinder.
108 * This is used for ISADMA bouncebuffer allocation and sets the max
109 * xfersize we support.
110 *
111 * 2.88M format has 2 x 36 x 512, allow for hacked up density.
112 */
113 #define MAX_BYTES_PER_CYL (2 * 40 * 512)
114
115 /*
116 * Timeout value for the PIO loops to wait until the FDC main status
117 * register matches our expectations (request for master, direction
118 * bit). This is supposed to be a number of microseconds, although
119 * timing might actually not be very accurate.
120 *
121 * Timeouts of 100 msec are believed to be required for some broken
122 * (old) hardware.
123 */
124 #define FDSTS_TIMEOUT 100000
125
126 /*
127 * After this many errors, stop whining. Close will reset this count.
128 */
129 #define FDC_ERRMAX 100
130
131 /*
132 * AutoDensity search lists for each drive type.
133 */
134
135 static struct fd_type fd_searchlist_360k[] = {
136 { FDF_5_360 },
137 { 0 }
138 };
139
140 static struct fd_type fd_searchlist_12m[] = {
141 { FDF_5_1200 | FL_AUTO },
142 { FDF_5_360 | FL_2STEP | FL_AUTO},
143 { 0 }
144 };
145
146 static struct fd_type fd_searchlist_720k[] = {
147 { FDF_3_720 },
148 { 0 }
149 };
150
151 static struct fd_type fd_searchlist_144m[] = {
152 { FDF_3_1440 | FL_AUTO},
153 { FDF_3_720 | FL_AUTO},
154 { 0 }
155 };
156
157 static struct fd_type fd_searchlist_288m[] = {
158 { FDF_3_1440 | FL_AUTO },
159 #if 0
160 { FDF_3_2880 | FL_AUTO }, /* XXX: probably doesn't work */
161 #endif
162 { FDF_3_720 | FL_AUTO},
163 { 0 }
164 };
165
166 /*
167 * Order must match enum fd_drivetype in <sys/fdcio.h>.
168 */
169 static struct fd_type *fd_native_types[] = {
170 NULL, /* FDT_NONE */
171 fd_searchlist_360k, /* FDT_360K */
172 fd_searchlist_12m, /* FDT_12M */
173 fd_searchlist_720k, /* FDT_720K */
174 fd_searchlist_144m, /* FDT_144M */
175 fd_searchlist_288m, /* FDT_288M_1 (mapped to FDT_288M) */
176 fd_searchlist_288m, /* FDT_288M */
177 };
178
179 /*
180 * Internals start here
181 */
182
183 /* registers */
184 #define FDOUT 2 /* Digital Output Register (W) */
185 #define FDO_FDSEL 0x03 /* floppy device select */
186 #define FDO_FRST 0x04 /* floppy controller reset */
187 #define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */
188 #define FDO_MOEN0 0x10 /* motor enable drive 0 */
189 #define FDO_MOEN1 0x20 /* motor enable drive 1 */
190 #define FDO_MOEN2 0x40 /* motor enable drive 2 */
191 #define FDO_MOEN3 0x80 /* motor enable drive 3 */
192
193 #define FDSTS 4 /* NEC 765 Main Status Register (R) */
194 #define FDDATA 5 /* NEC 765 Data Register (R/W) */
195 #define FDCTL 7 /* Control Register (W) */
196
197 /*
198 * The YE-DATA PC Card floppies use PIO to read in the data rather
199 * than DMA due to the wild variability of DMA for the PC Card
200 * devices. DMA was deleted from the PC Card specification in version
201 * 7.2 of the standard, but that post-dates the YE-DATA devices by many
202 * years.
203 *
204 * In addition, if we cannot setup the DMA resources for the ISA
205 * attachment, we'll use this same offset for data transfer. However,
206 * that almost certainly won't work.
207 *
208 * For this mode, offset 0 and 1 must be used to setup the transfer
209 * for this floppy. This is OK for PC Card YE Data devices, but for
210 * ISA this is likely wrong. These registers are only available on
211 * those systems that map them to the floppy drive. Newer systems do
212 * not do this, and we should likely prohibit access to them (or
213 * disallow NODMA to be set).
214 */
215 #define FDBCDR 0 /* And 1 */
216 #define FD_YE_DATAPORT 6 /* Drive Data port */
217
218 #define FDI_DCHG 0x80 /* diskette has been changed */
219 /* requires drive and motor being selected */
220 /* is cleared by any step pulse to drive */
221
222 /*
223 * We have three private BIO commands.
224 */
225 #define BIO_PROBE BIO_CMD0
226 #define BIO_RDID BIO_CMD1
227 #define BIO_FMT BIO_CMD2
228
229 /*
230 * Per drive structure (softc).
231 */
232 struct fd_data {
233 u_char *fd_ioptr; /* IO pointer */
234 u_int fd_iosize; /* Size of IO chunks */
235 u_int fd_iocount; /* Outstanding requests */
236 struct fdc_data *fdc; /* pointer to controller structure */
237 int fdsu; /* this units number on this controller */
238 enum fd_drivetype type; /* drive type */
239 struct fd_type *ft; /* pointer to current type descriptor */
240 struct fd_type fts; /* type descriptors */
241 int sectorsize;
242 int flags;
243 #define FD_WP (1<<0) /* Write protected */
244 #define FD_MOTOR (1<<1) /* motor should be on */
245 #define FD_MOTORWAIT (1<<2) /* motor should be on */
246 #define FD_EMPTY (1<<3) /* no media */
247 #define FD_NEWDISK (1<<4) /* media changed */
248 #define FD_ISADMA (1<<5) /* isa dma started */
249 int track; /* where we think the head is */
250 #define FD_NO_TRACK -2
251 int options; /* FDOPT_* */
252 struct callout toffhandle;
253 struct g_geom *fd_geom;
254 struct g_provider *fd_provider;
255 device_t dev;
256 struct bio_queue_head fd_bq;
257 };
258
259 #define FD_NOT_VALID -2
260
261 static driver_intr_t fdc_intr;
262 static void fdc_reset(struct fdc_data *);
263
264 SYSCTL_NODE(_debug, OID_AUTO, fdc, CTLFLAG_RW, 0, "fdc driver");
265
266 static int fifo_threshold = 8;
267 SYSCTL_INT(_debug_fdc, OID_AUTO, fifo, CTLFLAG_RW, &fifo_threshold, 0,
268 "FIFO threshold setting");
269
270 static int debugflags = 0;
271 SYSCTL_INT(_debug_fdc, OID_AUTO, debugflags, CTLFLAG_RW, &debugflags, 0,
272 "Debug flags");
273
274 static int retries = 10;
275 SYSCTL_INT(_debug_fdc, OID_AUTO, retries, CTLFLAG_RW, &retries, 0,
276 "Number of retries to attempt");
277
278 static int spec1 = 0xaf;
279 SYSCTL_INT(_debug_fdc, OID_AUTO, spec1, CTLFLAG_RW, &spec1, 0,
280 "Specification byte one (step-rate + head unload)");
281
282 static int spec2 = 0x10;
283 SYSCTL_INT(_debug_fdc, OID_AUTO, spec2, CTLFLAG_RW, &spec2, 0,
284 "Specification byte two (head load time + no-dma)");
285
286 static int settle;
287 SYSCTL_INT(_debug_fdc, OID_AUTO, settle, CTLFLAG_RW, &settle, 0,
288 "Head settling time in sec/hz");
289
290 static void
291 fdprinttype(struct fd_type *ft)
292 {
293
294 printf("(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,0x%x)",
295 ft->sectrac, ft->secsize, ft->datalen, ft->gap, ft->tracks,
296 ft->size, ft->trans, ft->heads, ft->f_gap, ft->f_inter,
297 ft->offset_side2, ft->flags);
298 }
299
300 static void
301 fdsettype(struct fd_data *fd, struct fd_type *ft)
302 {
303 fd->ft = ft;
304 ft->size = ft->sectrac * ft->heads * ft->tracks;
305 fd->sectorsize = 128 << fd->ft->secsize;
306 }
307
308 /*
309 * Bus space handling (access to low-level IO).
310 */
311 __inline static void
312 fdregwr(struct fdc_data *fdc, int reg, uint8_t v)
313 {
314
315 bus_space_write_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg], v);
316 }
317
318 __inline static uint8_t
319 fdregrd(struct fdc_data *fdc, int reg)
320 {
321
322 return bus_space_read_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg]);
323 }
324
325 static void
326 fdctl_wr(struct fdc_data *fdc, u_int8_t v)
327 {
328
329 fdregwr(fdc, FDCTL, v);
330 }
331
332 static void
333 fdout_wr(struct fdc_data *fdc, u_int8_t v)
334 {
335
336 fdregwr(fdc, FDOUT, v);
337 }
338
339 static u_int8_t
340 fdsts_rd(struct fdc_data *fdc)
341 {
342
343 return fdregrd(fdc, FDSTS);
344 }
345
346 static void
347 fddata_wr(struct fdc_data *fdc, u_int8_t v)
348 {
349
350 fdregwr(fdc, FDDATA, v);
351 }
352
353 static u_int8_t
354 fddata_rd(struct fdc_data *fdc)
355 {
356
357 return fdregrd(fdc, FDDATA);
358 }
359
360 static u_int8_t
361 fdin_rd(struct fdc_data *fdc)
362 {
363
364 return fdregrd(fdc, FDCTL);
365 }
366
367 /*
368 * Magic pseudo-DMA initialization for YE FDC. Sets count and
369 * direction.
370 */
371 static void
372 fdbcdr_wr(struct fdc_data *fdc, int iswrite, uint16_t count)
373 {
374 fdregwr(fdc, FDBCDR, (count - 1) & 0xff);
375 fdregwr(fdc, FDBCDR + 1,
376 (iswrite ? 0x80 : 0) | (((count - 1) >> 8) & 0x7f));
377 }
378
379 static int
380 fdc_err(struct fdc_data *fdc, const char *s)
381 {
382 fdc->fdc_errs++;
383 if (s) {
384 if (fdc->fdc_errs < FDC_ERRMAX)
385 device_printf(fdc->fdc_dev, "%s", s);
386 else if (fdc->fdc_errs == FDC_ERRMAX)
387 device_printf(fdc->fdc_dev, "too many errors, not "
388 "logging any more\n");
389 }
390
391 return (1);
392 }
393
394 /*
395 * FDC IO functions, take care of the main status register, timeout
396 * in case the desired status bits are never set.
397 *
398 * These PIO loops initially start out with short delays between
399 * each iteration in the expectation that the required condition
400 * is usually met quickly, so it can be handled immediately.
401 */
402 static int
403 fdc_in(struct fdc_data *fdc, int *ptr)
404 {
405 int i, j, step;
406
407 step = 1;
408 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
409 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
410 if (i == (NE7_DIO|NE7_RQM)) {
411 i = fddata_rd(fdc);
412 if (ptr)
413 *ptr = i;
414 return (0);
415 }
416 if (i == NE7_RQM)
417 return (fdc_err(fdc, "ready for output in input\n"));
418 step += step;
419 DELAY(step);
420 }
421 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
422 }
423
424 static int
425 fdc_out(struct fdc_data *fdc, int x)
426 {
427 int i, j, step;
428
429 step = 1;
430 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
431 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
432 if (i == NE7_RQM) {
433 fddata_wr(fdc, x);
434 return (0);
435 }
436 if (i == (NE7_DIO|NE7_RQM))
437 return (fdc_err(fdc, "ready for input in output\n"));
438 step += step;
439 DELAY(step);
440 }
441 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
442 }
443
444 /*
445 * fdc_cmd: Send a command to the chip.
446 * Takes a varargs with this structure:
447 * # of output bytes
448 * output bytes as int [...]
449 * # of input bytes
450 * input bytes as int* [...]
451 */
452 static int
453 fdc_cmd(struct fdc_data *fdc, int n_out, ...)
454 {
455 u_char cmd = 0;
456 int n_in;
457 int n, i;
458 va_list ap;
459
460 va_start(ap, n_out);
461 for (n = 0; n < n_out; n++) {
462 i = va_arg(ap, int);
463 if (n == 0)
464 cmd = i;
465 if (fdc_out(fdc, i) < 0) {
466 char msg[50];
467 snprintf(msg, sizeof(msg),
468 "cmd %x failed at out byte %d of %d\n",
469 cmd, n + 1, n_out);
470 fdc->flags |= FDC_NEEDS_RESET;
471 va_end(ap);
472 return fdc_err(fdc, msg);
473 }
474 }
475 n_in = va_arg(ap, int);
476 for (n = 0; n < n_in; n++) {
477 int *ptr = va_arg(ap, int *);
478 if (fdc_in(fdc, ptr) < 0) {
479 char msg[50];
480 snprintf(msg, sizeof(msg),
481 "cmd %02x failed at in byte %d of %d\n",
482 cmd, n + 1, n_in);
483 fdc->flags |= FDC_NEEDS_RESET;
484 va_end(ap);
485 return fdc_err(fdc, msg);
486 }
487 }
488 va_end(ap);
489 return (0);
490 }
491
492 static void
493 fdc_reset(struct fdc_data *fdc)
494 {
495 int i, r[10];
496
497 /* Try a reset, keep motor on */
498 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
499 DELAY(100);
500 /* enable FDC, but defer interrupts a moment */
501 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
502 DELAY(100);
503 fdout_wr(fdc, fdc->fdout);
504
505 /* XXX after a reset, silently believe the FDC will accept commands */
506 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, spec1, spec2, 0))
507 device_printf(fdc->fdc_dev, " SPECIFY failed in reset\n");
508
509 if (fdc->fdct == FDC_ENHANCED) {
510 if (fdc_cmd(fdc, 4,
511 I8207X_CONFIGURE,
512 0,
513 0x40 | /* Enable Implied Seek */
514 0x10 | /* Polling disabled */
515 (fifo_threshold - 1), /* Fifo threshold */
516 0x00, /* Precomp track */
517 0))
518 device_printf(fdc->fdc_dev,
519 " CONFIGURE failed in reset\n");
520 if (debugflags & 1) {
521 if (fdc_cmd(fdc, 1,
522 0x0e, /* DUMPREG */
523 10, &r[0], &r[1], &r[2], &r[3], &r[4],
524 &r[5], &r[6], &r[7], &r[8], &r[9]))
525 device_printf(fdc->fdc_dev,
526 " DUMPREG failed in reset\n");
527 for (i = 0; i < 10; i++)
528 printf(" %02x", r[i]);
529 printf("\n");
530 }
531 }
532 }
533
534 static int
535 fdc_sense_drive(struct fdc_data *fdc, int *st3p)
536 {
537 int st3;
538
539 if (fdc_cmd(fdc, 2, NE7CMD_SENSED, fdc->fd->fdsu, 1, &st3))
540 return (fdc_err(fdc, "Sense Drive Status failed\n"));
541 if (st3p)
542 *st3p = st3;
543 return (0);
544 }
545
546 static int
547 fdc_sense_int(struct fdc_data *fdc, int *st0p, int *cylp)
548 {
549 int cyl, st0, ret;
550
551 ret = fdc_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
552 if (ret) {
553 (void)fdc_err(fdc, "sense intr err reading stat reg 0\n");
554 return (ret);
555 }
556
557 if (st0p)
558 *st0p = st0;
559
560 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
561 /*
562 * There doesn't seem to have been an interrupt.
563 */
564 return (FD_NOT_VALID);
565 }
566
567 if (fdc_in(fdc, &cyl) < 0)
568 return fdc_err(fdc, "can't get cyl num\n");
569
570 if (cylp)
571 *cylp = cyl;
572
573 return (0);
574 }
575
576 static int
577 fdc_read_status(struct fdc_data *fdc)
578 {
579 int i, ret, status;
580
581 for (i = ret = 0; i < 7; i++) {
582 ret = fdc_in(fdc, &status);
583 fdc->status[i] = status;
584 if (ret != 0)
585 break;
586 }
587
588 if (ret == 0)
589 fdc->flags |= FDC_STAT_VALID;
590 else
591 fdc->flags &= ~FDC_STAT_VALID;
592
593 return ret;
594 }
595
596 /*
597 * Select this drive
598 */
599 static void
600 fd_select(struct fd_data *fd)
601 {
602 struct fdc_data *fdc;
603
604 /* XXX: lock controller */
605 fdc = fd->fdc;
606 fdc->fdout &= ~FDO_FDSEL;
607 fdc->fdout |= FDO_FDMAEN | FDO_FRST | fd->fdsu;
608 fdout_wr(fdc, fdc->fdout);
609 }
610
611 static void
612 fd_turnon(void *arg)
613 {
614 struct fd_data *fd;
615 struct bio *bp;
616 int once;
617
618 fd = arg;
619 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
620 fd->flags &= ~FD_MOTORWAIT;
621 fd->flags |= FD_MOTOR;
622 once = 0;
623 for (;;) {
624 bp = bioq_takefirst(&fd->fd_bq);
625 if (bp == NULL)
626 break;
627 bioq_disksort(&fd->fdc->head, bp);
628 once = 1;
629 }
630 if (once)
631 wakeup(&fd->fdc->head);
632 }
633
634 static void
635 fd_motor(struct fd_data *fd, int turnon)
636 {
637 struct fdc_data *fdc;
638
639 fdc = fd->fdc;
640 /*
641 mtx_assert(&fdc->fdc_mtx, MA_OWNED);
642 */
643 if (turnon) {
644 fd->flags |= FD_MOTORWAIT;
645 fdc->fdout |= (FDO_MOEN0 << fd->fdsu);
646 callout_reset(&fd->toffhandle, hz, fd_turnon, fd);
647 } else {
648 callout_stop(&fd->toffhandle);
649 fd->flags &= ~(FD_MOTOR|FD_MOTORWAIT);
650 fdc->fdout &= ~(FDO_MOEN0 << fd->fdsu);
651 }
652 fdout_wr(fdc, fdc->fdout);
653 }
654
655 static void
656 fd_turnoff(void *xfd)
657 {
658 struct fd_data *fd = xfd;
659
660 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
661 fd_motor(fd, 0);
662 }
663
664 /*
665 * fdc_intr - wake up the worker thread.
666 */
667
668 static void
669 fdc_intr(void *arg)
670 {
671
672 wakeup(arg);
673 }
674
675 /*
676 * fdc_pio(): perform programmed IO read/write for YE PCMCIA floppy.
677 */
678 static void
679 fdc_pio(struct fdc_data *fdc)
680 {
681 u_char *cptr;
682 struct bio *bp;
683 u_int count;
684
685 bp = fdc->bp;
686 cptr = fdc->fd->fd_ioptr;
687 count = fdc->fd->fd_iosize;
688
689 if (bp->bio_cmd == BIO_READ) {
690 fdbcdr_wr(fdc, 0, count);
691 bus_space_read_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
692 fdc->ioff[FD_YE_DATAPORT], cptr, count);
693 } else {
694 bus_space_write_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
695 fdc->ioff[FD_YE_DATAPORT], cptr, count);
696 fdbcdr_wr(fdc, 0, count); /* needed? */
697 }
698 }
699
700 static int
701 fdc_biodone(struct fdc_data *fdc, int error)
702 {
703 struct fd_data *fd;
704 struct bio *bp;
705
706 fd = fdc->fd;
707 bp = fdc->bp;
708
709 mtx_lock(&fdc->fdc_mtx);
710 if (--fd->fd_iocount == 0)
711 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
712 fdc->bp = NULL;
713 fdc->fd = NULL;
714 mtx_unlock(&fdc->fdc_mtx);
715 if (bp->bio_to != NULL) {
716 if ((debugflags & 2) && fd->fdc->retry > 0)
717 printf("retries: %d\n", fd->fdc->retry);
718 g_io_deliver(bp, error);
719 return (0);
720 }
721 bp->bio_error = error;
722 bp->bio_flags |= BIO_DONE;
723 wakeup(bp);
724 return (0);
725 }
726
727 static int retry_line;
728
729 static int
730 fdc_worker(struct fdc_data *fdc)
731 {
732 struct fd_data *fd;
733 struct bio *bp;
734 int i, nsect;
735 int st0, st3, cyl, mfm, steptrac, cylinder, descyl, sec;
736 int head;
737 static int need_recal;
738 struct fdc_readid *idp;
739 struct fd_formb *finfo;
740
741 /* Have we exhausted our retries ? */
742 bp = fdc->bp;
743 fd = fdc->fd;
744 if (bp != NULL &&
745 (fdc->retry >= retries || (fd->options & FDOPT_NORETRY))) {
746 if ((debugflags & 4))
747 printf("Too many retries (EIO)\n");
748 return (fdc_biodone(fdc, EIO));
749 }
750
751 /* Disable ISADMA if we bailed while it was active */
752 if (fd != NULL && (fd->flags & FD_ISADMA)) {
753 mtx_lock(&Giant);
754 isa_dmadone(
755 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE,
756 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
757 mtx_unlock(&Giant);
758 mtx_lock(&fdc->fdc_mtx);
759 fd->flags &= ~FD_ISADMA;
760 mtx_unlock(&fdc->fdc_mtx);
761 }
762
763 /* Unwedge the controller ? */
764 if (fdc->flags & FDC_NEEDS_RESET) {
765 fdc->flags &= ~FDC_NEEDS_RESET;
766 fdc_reset(fdc);
767 msleep(fdc, NULL, PRIBIO, "fdcrst", hz);
768 /* Discard results */
769 for (i = 0; i < 4; i++)
770 fdc_sense_int(fdc, &st0, &cyl);
771 /* All drives must recal */
772 need_recal = 0xf;
773 }
774
775 /* Pick up a request, if need be wait for it */
776 if (fdc->bp == NULL) {
777 mtx_lock(&fdc->fdc_mtx);
778 do {
779 fdc->bp = bioq_takefirst(&fdc->head);
780 if (fdc->bp == NULL)
781 msleep(&fdc->head, &fdc->fdc_mtx,
782 PRIBIO, "-", hz);
783 } while (fdc->bp == NULL &&
784 (fdc->flags & FDC_KTHREAD_EXIT) == 0);
785 mtx_unlock(&fdc->fdc_mtx);
786
787 if (fdc->bp == NULL)
788 /*
789 * Nothing to do, worker thread has been
790 * requested to stop.
791 */
792 return (0);
793
794 bp = fdc->bp;
795 fd = fdc->fd = bp->bio_driver1;
796 fdc->retry = 0;
797 fd->fd_ioptr = bp->bio_data;
798 if (bp->bio_cmd & BIO_FMT) {
799 i = offsetof(struct fd_formb, fd_formb_cylno(0));
800 fd->fd_ioptr += i;
801 fd->fd_iosize = bp->bio_length - i;
802 }
803 }
804
805 /* Select drive, setup params */
806 fd_select(fd);
807 fdctl_wr(fdc, fd->ft->trans);
808
809 if (bp->bio_cmd & BIO_PROBE) {
810
811 if (!(fdin_rd(fdc) & FDI_DCHG) && !(fd->flags & FD_EMPTY))
812 return (fdc_biodone(fdc, 0));
813
814 /*
815 * Try to find out if we have a disk in the drive
816 *
817 * First recal, then seek to cyl#1, this clears the
818 * old condition on the disk change line so we can
819 * examine it for current status
820 */
821 if (debugflags & 0x40)
822 printf("New disk in probe\n");
823 mtx_lock(&fdc->fdc_mtx);
824 fd->flags |= FD_NEWDISK;
825 mtx_unlock(&fdc->fdc_mtx);
826 retry_line = __LINE__;
827 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
828 return (1);
829 msleep(fdc, NULL, PRIBIO, "fdrecal", hz);
830 retry_line = __LINE__;
831 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
832 return (1); /* XXX */
833 retry_line = __LINE__;
834 if ((st0 & 0xc0) || cyl != 0)
835 return (1);
836
837 /* Seek to track 1 */
838 retry_line = __LINE__;
839 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, 1, 0))
840 return (1);
841 msleep(fdc, NULL, PRIBIO, "fdseek", hz);
842 retry_line = __LINE__;
843 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
844 return (1); /* XXX */
845 need_recal |= (1 << fd->fdsu);
846 if (fdin_rd(fdc) & FDI_DCHG) {
847 if (debugflags & 0x40)
848 printf("Empty in probe\n");
849 mtx_lock(&fdc->fdc_mtx);
850 fd->flags |= FD_EMPTY;
851 mtx_unlock(&fdc->fdc_mtx);
852 } else {
853 if (debugflags & 0x40)
854 printf("Got disk in probe\n");
855 mtx_lock(&fdc->fdc_mtx);
856 fd->flags &= ~FD_EMPTY;
857 mtx_unlock(&fdc->fdc_mtx);
858 retry_line = __LINE__;
859 if(fdc_sense_drive(fdc, &st3) != 0)
860 return (1);
861 mtx_lock(&fdc->fdc_mtx);
862 if(st3 & NE7_ST3_WP)
863 fd->flags |= FD_WP;
864 else
865 fd->flags &= ~FD_WP;
866 mtx_unlock(&fdc->fdc_mtx);
867 }
868 return (fdc_biodone(fdc, 0));
869 }
870
871 /*
872 * If we are dead just flush the requests
873 */
874 if (fd->flags & FD_EMPTY)
875 return (fdc_biodone(fdc, ENXIO));
876
877 /* Check if we lost our media */
878 if (fdin_rd(fdc) & FDI_DCHG) {
879 if (debugflags & 0x40)
880 printf("Lost disk\n");
881 mtx_lock(&fdc->fdc_mtx);
882 fd->flags |= FD_EMPTY;
883 fd->flags |= FD_NEWDISK;
884 mtx_unlock(&fdc->fdc_mtx);
885 g_topology_lock();
886 g_orphan_provider(fd->fd_provider, EXDEV);
887 fd->fd_provider->flags |= G_PF_WITHER;
888 fd->fd_provider =
889 g_new_providerf(fd->fd_geom, fd->fd_geom->name);
890 g_error_provider(fd->fd_provider, 0);
891 g_topology_unlock();
892 return (fdc_biodone(fdc, ENXIO));
893 }
894
895 /* Check if the floppy is write-protected */
896 if(bp->bio_cmd & (BIO_FMT | BIO_WRITE)) {
897 retry_line = __LINE__;
898 if(fdc_sense_drive(fdc, &st3) != 0)
899 return (1);
900 if(st3 & NE7_ST3_WP)
901 return (fdc_biodone(fdc, EROFS));
902 }
903
904 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0;
905 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1;
906 i = fd->ft->sectrac * fd->ft->heads;
907 cylinder = bp->bio_pblkno / i;
908 descyl = cylinder * steptrac;
909 sec = bp->bio_pblkno % i;
910 nsect = i - sec;
911 head = sec / fd->ft->sectrac;
912 sec = sec % fd->ft->sectrac + 1;
913
914 /* If everything is going swimmingly, use multisector xfer */
915 if (fdc->retry == 0 && bp->bio_cmd & (BIO_READ|BIO_WRITE)) {
916 fd->fd_iosize = imin(nsect * fd->sectorsize, bp->bio_resid);
917 nsect = fd->fd_iosize / fd->sectorsize;
918 } else if (bp->bio_cmd & (BIO_READ|BIO_WRITE)) {
919 fd->fd_iosize = fd->sectorsize;
920 nsect = 1;
921 }
922
923 /* Do RECAL if we need to or are going to track zero anyway */
924 if ((need_recal & (1 << fd->fdsu)) ||
925 (cylinder == 0 && fd->track != 0) ||
926 fdc->retry > 2) {
927 retry_line = __LINE__;
928 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
929 return (1);
930 msleep(fdc, NULL, PRIBIO, "fdrecal", hz);
931 retry_line = __LINE__;
932 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
933 return (1); /* XXX */
934 retry_line = __LINE__;
935 if ((st0 & 0xc0) || cyl != 0)
936 return (1);
937 need_recal &= ~(1 << fd->fdsu);
938 fd->track = 0;
939 /* let the heads settle */
940 if (settle)
941 msleep(fdc->fd, NULL, PRIBIO, "fdhdstl", settle);
942 }
943
944 /*
945 * SEEK to where we want to be
946 *
947 * Enhanced controllers do implied seeks for read&write as long as
948 * we do not need multiple steps per track.
949 */
950 if (cylinder != fd->track && (
951 fdc->fdct != FDC_ENHANCED ||
952 descyl != cylinder ||
953 (bp->bio_cmd & (BIO_RDID|BIO_FMT)))) {
954 retry_line = __LINE__;
955 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, descyl, 0))
956 return (1);
957 msleep(fdc, NULL, PRIBIO, "fdseek", hz);
958 retry_line = __LINE__;
959 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
960 return (1); /* XXX */
961 retry_line = __LINE__;
962 if ((st0 & 0xc0) || cyl != descyl) {
963 need_recal |= (1 << fd->fdsu);
964 return (1);
965 }
966 /* let the heads settle */
967 if (settle)
968 msleep(fdc->fd, NULL, PRIBIO, "fdhdstl", settle);
969 }
970 fd->track = cylinder;
971
972 if (debugflags & 8)
973 printf("op %x bn %ju siz %u ptr %p retry %d\n",
974 bp->bio_cmd, bp->bio_pblkno, fd->fd_iosize,
975 fd->fd_ioptr, fdc->retry);
976
977 /* Setup ISADMA if we need it and have it */
978 if ((bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_FMT))
979 && !(fdc->flags & FDC_NODMA)) {
980 mtx_lock(&Giant);
981 isa_dmastart(
982 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE,
983 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
984 mtx_unlock(&Giant);
985 mtx_lock(&fdc->fdc_mtx);
986 fd->flags |= FD_ISADMA;
987 mtx_unlock(&fdc->fdc_mtx);
988 }
989
990 /* Do PIO if we have to */
991 if (fdc->flags & FDC_NODMA) {
992 if (bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_FMT))
993 fdbcdr_wr(fdc, 1, fd->fd_iosize);
994 if (bp->bio_cmd & (BIO_WRITE|BIO_FMT))
995 fdc_pio(fdc);
996 }
997
998 switch(bp->bio_cmd) {
999 case BIO_FMT:
1000 /* formatting */
1001 finfo = (struct fd_formb *)bp->bio_data;
1002 retry_line = __LINE__;
1003 if (fdc_cmd(fdc, 6,
1004 NE7CMD_FORMAT | mfm,
1005 head << 2 | fd->fdsu,
1006 finfo->fd_formb_secshift,
1007 finfo->fd_formb_nsecs,
1008 finfo->fd_formb_gaplen,
1009 finfo->fd_formb_fillbyte, 0))
1010 return (1);
1011 break;
1012 case BIO_RDID:
1013 retry_line = __LINE__;
1014 if (fdc_cmd(fdc, 2,
1015 NE7CMD_READID | mfm,
1016 head << 2 | fd->fdsu, 0))
1017 return (1);
1018 break;
1019 case BIO_READ:
1020 retry_line = __LINE__;
1021 if (fdc_cmd(fdc, 9,
1022 NE7CMD_READ | NE7CMD_SK | mfm | NE7CMD_MT,
1023 head << 2 | fd->fdsu, /* head & unit */
1024 fd->track, /* track */
1025 head, /* head */
1026 sec, /* sector + 1 */
1027 fd->ft->secsize, /* sector size */
1028 fd->ft->sectrac, /* sectors/track */
1029 fd->ft->gap, /* gap size */
1030 fd->ft->datalen, /* data length */
1031 0))
1032 return (1);
1033 break;
1034 case BIO_WRITE:
1035 retry_line = __LINE__;
1036 if (fdc_cmd(fdc, 9,
1037 NE7CMD_WRITE | mfm | NE7CMD_MT,
1038 head << 2 | fd->fdsu, /* head & unit */
1039 fd->track, /* track */
1040 head, /* head */
1041 sec, /* sector + 1 */
1042 fd->ft->secsize, /* sector size */
1043 fd->ft->sectrac, /* sectors/track */
1044 fd->ft->gap, /* gap size */
1045 fd->ft->datalen, /* data length */
1046 0))
1047 return (1);
1048 break;
1049 default:
1050 KASSERT(0 == 1, ("Wrong bio_cmd %x\n", bp->bio_cmd));
1051 }
1052
1053 /* Wait for interrupt */
1054 i = msleep(fdc, NULL, PRIBIO, "fddata", hz);
1055
1056 /* PIO if the read looks good */
1057 if (i == 0 && (fdc->flags & FDC_NODMA) && (bp->bio_cmd & BIO_READ))
1058 fdc_pio(fdc);
1059
1060 /* Finish DMA */
1061 if (fd->flags & FD_ISADMA) {
1062 mtx_lock(&Giant);
1063 isa_dmadone(
1064 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE,
1065 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
1066 mtx_unlock(&Giant);
1067 mtx_lock(&fdc->fdc_mtx);
1068 fd->flags &= ~FD_ISADMA;
1069 mtx_unlock(&fdc->fdc_mtx);
1070 }
1071
1072 if (i != 0) {
1073 /*
1074 * Timeout.
1075 *
1076 * Due to IBM's brain-dead design, the FDC has a faked ready
1077 * signal, hardwired to ready == true. Thus, any command
1078 * issued if there's no diskette in the drive will _never_
1079 * complete, and must be aborted by resetting the FDC.
1080 * Many thanks, Big Blue!
1081 */
1082 retry_line = __LINE__;
1083 fdc->flags |= FDC_NEEDS_RESET;
1084 return (1);
1085 }
1086
1087 retry_line = __LINE__;
1088 if (fdc_read_status(fdc))
1089 return (1);
1090
1091 if (debugflags & 0x10)
1092 printf(" -> %x %x %x %x\n",
1093 fdc->status[0], fdc->status[1],
1094 fdc->status[2], fdc->status[3]);
1095
1096 st0 = fdc->status[0] & NE7_ST0_IC;
1097 if (st0 != 0) {
1098 retry_line = __LINE__;
1099 if (st0 == NE7_ST0_IC_AT && fdc->status[1] & NE7_ST1_OR) {
1100 /*
1101 * DMA overrun. Someone hogged the bus and
1102 * didn't release it in time for the next
1103 * FDC transfer.
1104 */
1105 return (1);
1106 }
1107 retry_line = __LINE__;
1108 if(st0 == NE7_ST0_IC_IV) {
1109 fdc->flags |= FDC_NEEDS_RESET;
1110 return (1);
1111 }
1112 retry_line = __LINE__;
1113 if(st0 == NE7_ST0_IC_AT && fdc->status[2] & NE7_ST2_WC) {
1114 need_recal |= (1 << fd->fdsu);
1115 return (1);
1116 }
1117 if (debugflags & 0x20) {
1118 printf("status %02x %02x %02x %02x %02x %02x\n",
1119 fdc->status[0], fdc->status[1], fdc->status[2],
1120 fdc->status[3], fdc->status[4], fdc->status[5]);
1121 }
1122 retry_line = __LINE__;
1123 return (1);
1124 }
1125 /* All OK */
1126 switch(bp->bio_cmd) {
1127 case BIO_RDID:
1128 /* copy out ID field contents */
1129 idp = (struct fdc_readid *)bp->bio_data;
1130 idp->cyl = fdc->status[3];
1131 idp->head = fdc->status[4];
1132 idp->sec = fdc->status[5];
1133 idp->secshift = fdc->status[6];
1134 if (debugflags & 0x40)
1135 printf("c %d h %d s %d z %d\n",
1136 idp->cyl, idp->head, idp->sec, idp->secshift);
1137 break;
1138 case BIO_READ:
1139 case BIO_WRITE:
1140 bp->bio_pblkno += nsect;
1141 bp->bio_resid -= fd->fd_iosize;
1142 bp->bio_completed += fd->fd_iosize;
1143 fd->fd_ioptr += fd->fd_iosize;
1144 /* Since we managed to get something done, reset the retry */
1145 fdc->retry = 0;
1146 if (bp->bio_resid > 0)
1147 return (0);
1148 break;
1149 case BIO_FMT:
1150 break;
1151 }
1152 return (fdc_biodone(fdc, 0));
1153 }
1154
1155 static void
1156 fdc_thread(void *arg)
1157 {
1158 struct fdc_data *fdc;
1159
1160 fdc = arg;
1161 int i;
1162
1163 mtx_lock(&fdc->fdc_mtx);
1164 fdc->flags |= FDC_KTHREAD_ALIVE;
1165 while ((fdc->flags & FDC_KTHREAD_EXIT) == 0) {
1166 mtx_unlock(&fdc->fdc_mtx);
1167 i = fdc_worker(fdc);
1168 if (i && debugflags & 0x20) {
1169 if (fdc->bp != NULL) {
1170 g_print_bio(fdc->bp);
1171 printf("\n");
1172 }
1173 printf("Retry line %d\n", retry_line);
1174 }
1175 fdc->retry += i;
1176 mtx_lock(&fdc->fdc_mtx);
1177 }
1178 fdc->flags &= ~(FDC_KTHREAD_EXIT | FDC_KTHREAD_ALIVE);
1179 wakeup(&fdc->fdc_thread);
1180 mtx_unlock(&fdc->fdc_mtx);
1181
1182 kthread_exit(0);
1183 }
1184
1185 /*
1186 * Enqueue a request.
1187 */
1188 static void
1189 fd_enqueue(struct fd_data *fd, struct bio *bp)
1190 {
1191 struct fdc_data *fdc;
1192 int call;
1193
1194 call = 0;
1195 fdc = fd->fdc;
1196 mtx_lock(&fdc->fdc_mtx);
1197 /* If we go from idle, cancel motor turnoff */
1198 if (fd->fd_iocount++ == 0)
1199 callout_stop(&fd->toffhandle);
1200 if (fd->flags & FD_MOTOR) {
1201 /* The motor is on, send it directly to the controller */
1202 bioq_disksort(&fdc->head, bp);
1203 wakeup(&fdc->head);
1204 } else {
1205 /* Queue it on the drive until the motor has started */
1206 bioq_insert_tail(&fd->fd_bq, bp);
1207 if (!(fd->flags & FD_MOTORWAIT))
1208 fd_motor(fd, 1);
1209 }
1210 mtx_unlock(&fdc->fdc_mtx);
1211 }
1212
1213 static int
1214 fdmisccmd(struct fd_data *fd, u_int cmd, void *data)
1215 {
1216 struct bio *bp;
1217 struct fd_formb *finfo;
1218 struct fdc_readid *idfield;
1219 int error;
1220
1221 bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO);
1222
1223 /*
1224 * Set up a bio request for fdstrategy(). bio_offset is faked
1225 * so that fdstrategy() will seek to the the requested
1226 * cylinder, and use the desired head.
1227 */
1228 bp->bio_cmd = cmd;
1229 if (cmd == BIO_FMT) {
1230 finfo = (struct fd_formb *)data;
1231 bp->bio_pblkno =
1232 (finfo->cyl * fd->ft->heads + finfo->head) *
1233 fd->ft->sectrac;
1234 bp->bio_length = sizeof *finfo;
1235 } else if (cmd == BIO_RDID) {
1236 idfield = (struct fdc_readid *)data;
1237 bp->bio_pblkno =
1238 (idfield->cyl * fd->ft->heads + idfield->head) *
1239 fd->ft->sectrac;
1240 bp->bio_length = sizeof(struct fdc_readid);
1241 } else if (cmd == BIO_PROBE) {
1242 /* nothing */
1243 } else
1244 panic("wrong cmd in fdmisccmd()");
1245 bp->bio_offset = bp->bio_pblkno * fd->sectorsize;
1246 bp->bio_data = data;
1247 bp->bio_driver1 = fd;
1248 bp->bio_flags = 0;
1249
1250 fd_enqueue(fd, bp);
1251
1252 do {
1253 msleep(bp, NULL, PRIBIO, "fdwait", hz);
1254 } while (!(bp->bio_flags & BIO_DONE));
1255 error = bp->bio_error;
1256
1257 free(bp, M_TEMP);
1258 return (error);
1259 }
1260
1261 /*
1262 * Try figuring out the density of the media present in our device.
1263 */
1264 static int
1265 fdautoselect(struct fd_data *fd)
1266 {
1267 struct fd_type *fdtp;
1268 struct fdc_readid id;
1269 int oopts, rv;
1270
1271 if (!(fd->ft->flags & FL_AUTO))
1272 return (0);
1273
1274 fdtp = fd_native_types[fd->type];
1275 fdsettype(fd, fdtp);
1276 if (!(fd->ft->flags & FL_AUTO))
1277 return (0);
1278
1279 /*
1280 * Try reading sector ID fields, first at cylinder 0, head 0,
1281 * then at cylinder 2, head N. We don't probe cylinder 1,
1282 * since for 5.25in DD media in a HD drive, there are no data
1283 * to read (2 step pulses per media cylinder required). For
1284 * two-sided media, the second probe always goes to head 1, so
1285 * we can tell them apart from single-sided media. As a
1286 * side-effect this means that single-sided media should be
1287 * mentioned in the search list after two-sided media of an
1288 * otherwise identical density. Media with a different number
1289 * of sectors per track but otherwise identical parameters
1290 * cannot be distinguished at all.
1291 *
1292 * If we successfully read an ID field on both cylinders where
1293 * the recorded values match our expectation, we are done.
1294 * Otherwise, we try the next density entry from the table.
1295 *
1296 * Stepping to cylinder 2 has the side-effect of clearing the
1297 * unit attention bit.
1298 */
1299 oopts = fd->options;
1300 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1301 for (; fdtp->heads; fdtp++) {
1302 fdsettype(fd, fdtp);
1303
1304 id.cyl = id.head = 0;
1305 rv = fdmisccmd(fd, BIO_RDID, &id);
1306 if (rv != 0)
1307 continue;
1308 if (id.cyl != 0 || id.head != 0 || id.secshift != fdtp->secsize)
1309 continue;
1310 id.cyl = 2;
1311 id.head = fd->ft->heads - 1;
1312 rv = fdmisccmd(fd, BIO_RDID, &id);
1313 if (id.cyl != 2 || id.head != fdtp->heads - 1 ||
1314 id.secshift != fdtp->secsize)
1315 continue;
1316 if (rv == 0)
1317 break;
1318 }
1319
1320 fd->options = oopts;
1321 if (fdtp->heads == 0) {
1322 if (debugflags & 0x40)
1323 device_printf(fd->dev, "autoselection failed\n");
1324 fdsettype(fd, fd_native_types[fd->type]);
1325 return (0);
1326 } else {
1327 if (debugflags & 0x40) {
1328 device_printf(fd->dev,
1329 "autoselected %d KB medium\n", fd->ft->size / 2);
1330 fdprinttype(fd->ft);
1331 }
1332 return (0);
1333 }
1334 }
1335
1336 /*
1337 * GEOM class implementation
1338 */
1339
1340 static g_access_t fd_access;
1341 static g_start_t fd_start;
1342 static g_ioctl_t fd_ioctl;
1343
1344 struct g_class g_fd_class = {
1345 .name = "FD",
1346 .version = G_VERSION,
1347 .start = fd_start,
1348 .access = fd_access,
1349 .ioctl = fd_ioctl,
1350 };
1351
1352 static int
1353 fd_access(struct g_provider *pp, int r, int w, int e)
1354 {
1355 struct fd_data *fd;
1356 struct fdc_data *fdc;
1357 int ar, aw, ae;
1358
1359 fd = pp->geom->softc;
1360 fdc = fd->fdc;
1361
1362 /*
1363 * If our provider is withering, we can only get negative requests
1364 * and we don't want to even see them
1365 */
1366 if (pp->flags & G_PF_WITHER)
1367 return (0);
1368
1369 ar = r + pp->acr;
1370 aw = w + pp->acw;
1371 ae = e + pp->ace;
1372
1373 if (ar == 0 && aw == 0 && ae == 0) {
1374 device_unbusy(fd->dev);
1375 return (0);
1376 }
1377
1378 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) {
1379 if (fdmisccmd(fd, BIO_PROBE, NULL))
1380 return (ENXIO);
1381 if (fd->flags & FD_EMPTY)
1382 return (ENXIO);
1383 if (fd->flags & FD_NEWDISK) {
1384 fdautoselect(fd);
1385 mtx_lock(&fdc->fdc_mtx);
1386 fd->flags &= ~FD_NEWDISK;
1387 mtx_unlock(&fdc->fdc_mtx);
1388 }
1389 device_busy(fd->dev);
1390 }
1391
1392 if (w > 0 && (fd->flags & FD_WP))
1393 return (EROFS);
1394
1395 pp->sectorsize = fd->sectorsize;
1396 pp->stripesize = fd->ft->heads * fd->ft->sectrac * fd->sectorsize;
1397 pp->mediasize = pp->stripesize * fd->ft->tracks;
1398 return (0);
1399 }
1400
1401 static void
1402 fd_start(struct bio *bp)
1403 {
1404 struct fdc_data * fdc;
1405 struct fd_data * fd;
1406
1407 fd = bp->bio_to->geom->softc;
1408 fdc = fd->fdc;
1409 bp->bio_driver1 = fd;
1410 if (bp->bio_cmd & BIO_GETATTR) {
1411 if (g_handleattr_int(bp, "GEOM::fwsectors", fd->ft->sectrac))
1412 return;
1413 if (g_handleattr_int(bp, "GEOM::fwheads", fd->ft->heads))
1414 return;
1415 g_io_deliver(bp, ENOIOCTL);
1416 return;
1417 }
1418 if (!(bp->bio_cmd & (BIO_READ|BIO_WRITE))) {
1419 g_io_deliver(bp, EOPNOTSUPP);
1420 return;
1421 }
1422 bp->bio_pblkno = bp->bio_offset / fd->sectorsize;
1423 bp->bio_resid = bp->bio_length;
1424 fd_enqueue(fd, bp);
1425 return;
1426 }
1427
1428 static int
1429 fd_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td)
1430 {
1431 struct fd_data *fd;
1432 struct fdc_status *fsp;
1433 struct fdc_readid *rid;
1434 int error;
1435
1436 fd = pp->geom->softc;
1437
1438 switch (cmd) {
1439 case FD_GTYPE: /* get drive type */
1440 *(struct fd_type *)data = *fd->ft;
1441 return (0);
1442
1443 case FD_STYPE: /* set drive type */
1444 if (!(fflag & FWRITE))
1445 return (EPERM);
1446 /*
1447 * Allow setting drive type temporarily iff
1448 * currently unset. Used for fdformat so any
1449 * user can set it, and then start formatting.
1450 */
1451 fd->fts = *(struct fd_type *)data;
1452 if (fd->fts.sectrac) {
1453 /* XXX: check for rubbish */
1454 fdsettype(fd, &fd->fts);
1455 } else {
1456 fdsettype(fd, fd_native_types[fd->type]);
1457 }
1458 if (debugflags & 0x40)
1459 fdprinttype(fd->ft);
1460 return (0);
1461
1462 case FD_GOPTS: /* get drive options */
1463 *(int *)data = fd->options;
1464 return (0);
1465
1466 case FD_SOPTS: /* set drive options */
1467 if (!(fflag & FWRITE))
1468 return (EPERM);
1469 fd->options = *(int *)data;
1470 return (0);
1471
1472 case FD_CLRERR:
1473 if (suser(td) != 0)
1474 return (EPERM);
1475 fd->fdc->fdc_errs = 0;
1476 return (0);
1477
1478 case FD_GSTAT:
1479 fsp = (struct fdc_status *)data;
1480 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
1481 return (EINVAL);
1482 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
1483 return (0);
1484
1485 case FD_GDTYPE:
1486 *(enum fd_drivetype *)data = fd->type;
1487 return (0);
1488
1489 case FD_FORM:
1490 if (!(fflag & FWRITE))
1491 return (EPERM);
1492 if (((struct fd_formb *)data)->format_version !=
1493 FD_FORMAT_VERSION)
1494 return (EINVAL); /* wrong version of formatting prog */
1495 error = fdmisccmd(fd, BIO_FMT, data);
1496 mtx_lock(&fd->fdc->fdc_mtx);
1497 fd->flags |= FD_NEWDISK;
1498 mtx_unlock(&fd->fdc->fdc_mtx);
1499 break;
1500
1501 case FD_READID:
1502 rid = (struct fdc_readid *)data;
1503 if (rid->cyl > 85 || rid->head > 1)
1504 return (EINVAL);
1505 error = fdmisccmd(fd, BIO_RDID, data);
1506 break;
1507
1508 case FIONBIO:
1509 case FIOASYNC:
1510 /* For backwards compat with old fd*(8) tools */
1511 error = 0;
1512 break;
1513
1514 default:
1515 if (debugflags & 0x80)
1516 printf("Unknown ioctl %lx\n", cmd);
1517 error = ENOIOCTL;
1518 break;
1519 }
1520 return (error);
1521 };
1522
1523
1524
1525 /*
1526 * Configuration/initialization stuff, per controller.
1527 */
1528
1529 devclass_t fdc_devclass;
1530 static devclass_t fd_devclass;
1531
1532 struct fdc_ivars {
1533 int fdunit;
1534 int fdtype;
1535 };
1536
1537 void
1538 fdc_release_resources(struct fdc_data *fdc)
1539 {
1540 device_t dev;
1541 struct resource *last;
1542 int i;
1543
1544 dev = fdc->fdc_dev;
1545 if (fdc->fdc_intr)
1546 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1547 fdc->fdc_intr = NULL;
1548 if (fdc->res_irq != NULL)
1549 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
1550 fdc->res_irq);
1551 fdc->res_irq = NULL;
1552 last = NULL;
1553 for (i = 0; i < FDC_MAXREG; i++) {
1554 if (fdc->resio[i] != NULL && fdc->resio[i] != last) {
1555 bus_release_resource(dev, SYS_RES_IOPORT,
1556 fdc->ridio[i], fdc->resio[i]);
1557 last = fdc->resio[i];
1558 fdc->resio[i] = NULL;
1559 }
1560 }
1561 if (fdc->res_drq != NULL)
1562 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
1563 fdc->res_drq);
1564 fdc->res_drq = NULL;
1565 }
1566
1567 int
1568 fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
1569 {
1570 struct fdc_ivars *ivars = device_get_ivars(child);
1571
1572 switch (which) {
1573 case FDC_IVAR_FDUNIT:
1574 *result = ivars->fdunit;
1575 break;
1576 case FDC_IVAR_FDTYPE:
1577 *result = ivars->fdtype;
1578 break;
1579 default:
1580 return (ENOENT);
1581 }
1582 return (0);
1583 }
1584
1585 int
1586 fdc_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
1587 {
1588 struct fdc_ivars *ivars = device_get_ivars(child);
1589
1590 switch (which) {
1591 case FDC_IVAR_FDUNIT:
1592 ivars->fdunit = value;
1593 break;
1594 case FDC_IVAR_FDTYPE:
1595 ivars->fdtype = value;
1596 break;
1597 default:
1598 return (ENOENT);
1599 }
1600 return (0);
1601 }
1602
1603 int
1604 fdc_initial_reset(device_t dev, struct fdc_data *fdc)
1605 {
1606 int ic_type, part_id;
1607
1608 /*
1609 * A status value of 0xff is very unlikely, but not theoretically
1610 * impossible, but it is far more likely to indicate an empty bus.
1611 */
1612 if (fdsts_rd(fdc) == 0xff)
1613 return (ENXIO);
1614
1615 /*
1616 * Assert a reset to the floppy controller and check that the status
1617 * register goes to zero.
1618 */
1619 fdout_wr(fdc, 0);
1620 fdout_wr(fdc, 0);
1621 if (fdsts_rd(fdc) != 0)
1622 return (ENXIO);
1623
1624 /*
1625 * Clear the reset and see it come ready.
1626 */
1627 fdout_wr(fdc, FDO_FRST);
1628 DELAY(100);
1629 if (fdsts_rd(fdc) != 0x80)
1630 return (ENXIO);
1631
1632 /* Then, see if it can handle a command. */
1633 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, 0xaf, 0x1e, 0))
1634 return (ENXIO);
1635
1636 /*
1637 * Try to identify the chip.
1638 *
1639 * The i8272 datasheet documents that unknown commands
1640 * will return ST0 as 0x80. The i8272 is supposedly identical
1641 * to the NEC765.
1642 * The i82077SL datasheet says 0x90 for the VERSION command,
1643 * and several "superio" chips emulate this.
1644 */
1645 if (fdc_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type))
1646 return (ENXIO);
1647 if (fdc_cmd(fdc, 1, 0x18, 1, &part_id))
1648 return (ENXIO);
1649 if (bootverbose)
1650 device_printf(dev,
1651 "ic_type %02x part_id %02x\n", ic_type, part_id);
1652 switch (ic_type & 0xff) {
1653 case 0x80:
1654 device_set_desc(dev, "NEC 765 or clone");
1655 fdc->fdct = FDC_NE765;
1656 break;
1657 case 0x81:
1658 case 0x90:
1659 device_set_desc(dev,
1660 "Enhanced floppy controller");
1661 fdc->fdct = FDC_ENHANCED;
1662 break;
1663 default:
1664 device_set_desc(dev, "Generic floppy controller");
1665 fdc->fdct = FDC_UNKNOWN;
1666 break;
1667 }
1668 return (0);
1669 }
1670
1671 int
1672 fdc_detach(device_t dev)
1673 {
1674 struct fdc_data *fdc;
1675 int error;
1676
1677 fdc = device_get_softc(dev);
1678
1679 /* have our children detached first */
1680 if ((error = bus_generic_detach(dev)))
1681 return (error);
1682
1683 /* kill worker thread */
1684 fdc->flags |= FDC_KTHREAD_EXIT;
1685 mtx_lock(&fdc->fdc_mtx);
1686 wakeup(&fdc->head);
1687 while ((fdc->flags & FDC_KTHREAD_ALIVE) != 0)
1688 msleep(&fdc->fdc_thread, &fdc->fdc_mtx, PRIBIO, "fdcdet", 0);
1689 mtx_unlock(&fdc->fdc_mtx);
1690
1691 /* reset controller, turn motor off */
1692 fdout_wr(fdc, 0);
1693
1694 if (!(fdc->flags & FDC_NODMA))
1695 isa_dma_release(fdc->dmachan);
1696 fdc_release_resources(fdc);
1697 mtx_destroy(&fdc->fdc_mtx);
1698 return (0);
1699 }
1700
1701 /*
1702 * Add a child device to the fdc controller. It will then be probed etc.
1703 */
1704 device_t
1705 fdc_add_child(device_t dev, const char *name, int unit)
1706 {
1707 struct fdc_ivars *ivar;
1708 device_t child;
1709
1710 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO);
1711 if (ivar == NULL)
1712 return (NULL);
1713 child = device_add_child(dev, name, unit);
1714 if (child == NULL) {
1715 free(ivar, M_DEVBUF);
1716 return (NULL);
1717 }
1718 device_set_ivars(child, ivar);
1719 ivar->fdunit = unit;
1720 ivar->fdtype = FDT_NONE;
1721 if (resource_disabled(name, unit))
1722 device_disable(child);
1723 return (child);
1724 }
1725
1726 int
1727 fdc_attach(device_t dev)
1728 {
1729 struct fdc_data *fdc;
1730 int error;
1731
1732 fdc = device_get_softc(dev);
1733 fdc->fdc_dev = dev;
1734 error = fdc_initial_reset(dev, fdc);
1735 if (error) {
1736 device_printf(dev, "does not respond\n");
1737 return (error);
1738 }
1739 error = bus_setup_intr(dev, fdc->res_irq,
1740 INTR_TYPE_BIO | INTR_ENTROPY | INTR_MPSAFE |
1741 ((fdc->flags & FDC_NOFAST) ? 0 : INTR_FAST),
1742 fdc_intr, fdc, &fdc->fdc_intr);
1743 if (error) {
1744 device_printf(dev, "cannot setup interrupt\n");
1745 return (error);
1746 }
1747 if (!(fdc->flags & FDC_NODMA)) {
1748 error = isa_dma_acquire(fdc->dmachan);
1749 if (!error) {
1750 error = isa_dma_init(fdc->dmachan,
1751 MAX_BYTES_PER_CYL, M_WAITOK);
1752 if (error)
1753 isa_dma_release(fdc->dmachan);
1754 }
1755 if (error)
1756 return (error);
1757 }
1758 fdc->fdcu = device_get_unit(dev);
1759 fdc->flags |= FDC_NEEDS_RESET;
1760
1761 mtx_init(&fdc->fdc_mtx, "fdc lock", NULL, MTX_DEF);
1762
1763 /* reset controller, turn motor off, clear fdout mirror reg */
1764 fdout_wr(fdc, fdc->fdout = 0);
1765 bioq_init(&fdc->head);
1766
1767 kthread_create(fdc_thread, fdc, &fdc->fdc_thread, 0, 0,
1768 "fdc%d", device_get_unit(dev));
1769
1770 settle = hz / 8;
1771
1772 return (0);
1773 }
1774
1775 int
1776 fdc_hints_probe(device_t dev)
1777 {
1778 const char *name, *dname;
1779 int i, error, dunit;
1780
1781 /*
1782 * Probe and attach any children. We should probably detect
1783 * devices from the BIOS unless overridden.
1784 */
1785 name = device_get_nameunit(dev);
1786 i = 0;
1787 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) {
1788 resource_int_value(dname, dunit, "drive", &dunit);
1789 fdc_add_child(dev, dname, dunit);
1790 }
1791
1792 if ((error = bus_generic_attach(dev)) != 0)
1793 return (error);
1794 return (0);
1795 }
1796
1797 int
1798 fdc_print_child(device_t me, device_t child)
1799 {
1800 int retval = 0, flags;
1801
1802 retval += bus_print_child_header(me, child);
1803 retval += printf(" on %s drive %d", device_get_nameunit(me),
1804 fdc_get_fdunit(child));
1805 if ((flags = device_get_flags(me)) != 0)
1806 retval += printf(" flags %#x", flags);
1807 retval += printf("\n");
1808
1809 return (retval);
1810 }
1811
1812 /*
1813 * Configuration/initialization, per drive.
1814 */
1815 static int
1816 fd_probe(device_t dev)
1817 {
1818 int i, unit;
1819 u_int st0, st3;
1820 struct fd_data *fd;
1821 struct fdc_data *fdc;
1822 int fdsu;
1823 int flags, type;
1824
1825 fdsu = fdc_get_fdunit(dev);
1826 fd = device_get_softc(dev);
1827 fdc = device_get_softc(device_get_parent(dev));
1828 flags = device_get_flags(dev);
1829
1830 fd->dev = dev;
1831 fd->fdc = fdc;
1832 fd->fdsu = fdsu;
1833 unit = device_get_unit(dev);
1834
1835 /* Auto-probe if fdinfo is present, but always allow override. */
1836 type = flags & FD_TYPEMASK;
1837 if (type == FDT_NONE && (type = fdc_get_fdtype(dev)) != FDT_NONE) {
1838 fd->type = type;
1839 goto done;
1840 } else {
1841 /* make sure fdautoselect() will be called */
1842 fd->flags = FD_EMPTY;
1843 fd->type = type;
1844 }
1845
1846 #if (defined(__i386__) && !defined(PC98)) || defined(__amd64__)
1847 if (fd->type == FDT_NONE && (unit == 0 || unit == 1)) {
1848 /* Look up what the BIOS thinks we have. */
1849 if (unit == 0)
1850 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4;
1851 else
1852 fd->type = rtcin(RTC_FDISKETTE) & 0x0f;
1853 if (fd->type == FDT_288M_1)
1854 fd->type = FDT_288M;
1855 }
1856 #endif /* __i386__ || __amd64__ */
1857 /* is there a unit? */
1858 if (fd->type == FDT_NONE)
1859 return (ENXIO);
1860
1861 /*
1862 mtx_lock(&fdc->fdc_mtx);
1863 */
1864 /* select it */
1865 fd_select(fd);
1866 fd_motor(fd, 1);
1867 fdc->fd = fd;
1868 fdc_reset(fdc); /* XXX reset, then unreset, etc. */
1869 DELAY(1000000); /* 1 sec */
1870
1871 if ((flags & FD_NO_PROBE) == 0) {
1872 /* If we're at track 0 first seek inwards. */
1873 if ((fdc_sense_drive(fdc, &st3) == 0) &&
1874 (st3 & NE7_ST3_T0)) {
1875 /* Seek some steps... */
1876 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
1877 /* ...wait a moment... */
1878 DELAY(300000);
1879 /* make ctrlr happy: */
1880 fdc_sense_int(fdc, NULL, NULL);
1881 }
1882 }
1883
1884 for (i = 0; i < 2; i++) {
1885 /*
1886 * we must recalibrate twice, just in case the
1887 * heads have been beyond cylinder 76, since
1888 * most FDCs still barf when attempting to
1889 * recalibrate more than 77 steps
1890 */
1891 /* go back to 0: */
1892 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
1893 /* a second being enough for full stroke seek*/
1894 DELAY(i == 0 ? 1000000 : 300000);
1895
1896 /* anything responding? */
1897 if (fdc_sense_int(fdc, &st0, NULL) == 0 &&
1898 (st0 & NE7_ST0_EC) == 0)
1899 break; /* already probed succesfully */
1900 }
1901 }
1902 }
1903
1904 fd_motor(fd, 0);
1905 fdc->fd = NULL;
1906 /*
1907 mtx_unlock(&fdc->fdc_mtx);
1908 */
1909
1910 if ((flags & FD_NO_PROBE) == 0 &&
1911 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */
1912 return (ENXIO);
1913
1914 done:
1915
1916 switch (fd->type) {
1917 case FDT_12M:
1918 device_set_desc(dev, "1200-KB 5.25\" drive");
1919 break;
1920 case FDT_144M:
1921 device_set_desc(dev, "1440-KB 3.5\" drive");
1922 break;
1923 case FDT_288M:
1924 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
1925 break;
1926 case FDT_360K:
1927 device_set_desc(dev, "360-KB 5.25\" drive");
1928 break;
1929 case FDT_720K:
1930 device_set_desc(dev, "720-KB 3.5\" drive");
1931 break;
1932 default:
1933 return (ENXIO);
1934 }
1935 fd->track = FD_NO_TRACK;
1936 fd->fdc = fdc;
1937 fd->fdsu = fdsu;
1938 fd->options = 0;
1939 callout_init_mtx(&fd->toffhandle, &fd->fdc->fdc_mtx, 0);
1940
1941 /* initialize densities for subdevices */
1942 fdsettype(fd, fd_native_types[fd->type]);
1943 return (0);
1944 }
1945
1946 /*
1947 * We have to do this in a geom event because GEOM is not running
1948 * when fd_attach() is.
1949 * XXX: move fd_attach after geom like ata/scsi disks
1950 */
1951 static void
1952 fd_attach2(void *arg, int flag)
1953 {
1954 struct fd_data *fd;
1955
1956 fd = arg;
1957
1958 fd->fd_geom = g_new_geomf(&g_fd_class,
1959 "fd%d", device_get_unit(fd->dev));
1960 fd->fd_provider = g_new_providerf(fd->fd_geom, fd->fd_geom->name);
1961 fd->fd_geom->softc = fd;
1962 g_error_provider(fd->fd_provider, 0);
1963 }
1964
1965 static int
1966 fd_attach(device_t dev)
1967 {
1968 struct fd_data *fd;
1969
1970 fd = device_get_softc(dev);
1971 g_post_event(fd_attach2, fd, M_WAITOK, NULL);
1972 fd->flags |= FD_EMPTY;
1973 bioq_init(&fd->fd_bq);
1974
1975 return (0);
1976 }
1977
1978 static int
1979 fd_detach(device_t dev)
1980 {
1981 struct fd_data *fd;
1982
1983 fd = device_get_softc(dev);
1984 g_topology_lock();
1985 g_wither_geom(fd->fd_geom, ENXIO);
1986 g_topology_unlock();
1987 while (device_get_state(dev) == DS_BUSY)
1988 tsleep(fd, PZERO, "fdd", hz/10);
1989 callout_drain(&fd->toffhandle);
1990
1991 return (0);
1992 }
1993
1994 static device_method_t fd_methods[] = {
1995 /* Device interface */
1996 DEVMETHOD(device_probe, fd_probe),
1997 DEVMETHOD(device_attach, fd_attach),
1998 DEVMETHOD(device_detach, fd_detach),
1999 DEVMETHOD(device_shutdown, bus_generic_shutdown),
2000 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
2001 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
2002 { 0, 0 }
2003 };
2004
2005 static driver_t fd_driver = {
2006 "fd",
2007 fd_methods,
2008 sizeof(struct fd_data)
2009 };
2010
2011 static int
2012 fdc_modevent(module_t mod, int type, void *data)
2013 {
2014
2015 g_modevent(NULL, type, &g_fd_class);
2016 return (0);
2017 }
2018
2019 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, fdc_modevent, 0);
Cache object: d41f5e74cc63d26351fc1add3c454d3a
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