FreeBSD/Linux Kernel Cross Reference
sys/dev/fdc/fdc.c
1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2004 Poul-Henning Kamp
5 * Copyright (c) 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Don Ahn.
10 *
11 * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu)
12 * aided by the Linux floppy driver modifications from David Bateman
13 * (dbateman@eng.uts.edu.au).
14 *
15 * Copyright (c) 1993, 1994 by
16 * jc@irbs.UUCP (John Capo)
17 * vak@zebub.msk.su (Serge Vakulenko)
18 * ache@astral.msk.su (Andrew A. Chernov)
19 *
20 * Copyright (c) 1993, 1994, 1995 by
21 * joerg_wunsch@uriah.sax.de (Joerg Wunsch)
22 * dufault@hda.com (Peter Dufault)
23 *
24 * Copyright (c) 2001 Joerg Wunsch,
25 * joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
26 *
27 * Redistribution and use in source and binary forms, with or without
28 * modification, are permitted provided that the following conditions
29 * are met:
30 * 1. Redistributions of source code must retain the above copyright
31 * notice, this list of conditions and the following disclaimer.
32 * 2. Redistributions in binary form must reproduce the above copyright
33 * notice, this list of conditions and the following disclaimer in the
34 * documentation and/or other materials provided with the distribution.
35 * 3. Neither the name of the University nor the names of its contributors
36 * may be used to endorse or promote products derived from this software
37 * without specific prior written permission.
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
40 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
42 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
43 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
44 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
45 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
47 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
48 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
49 * SUCH DAMAGE.
50 *
51 * from: @(#)fd.c 7.4 (Berkeley) 5/25/91
52 *
53 */
54
55 #include <sys/cdefs.h>
56 __FBSDID("$FreeBSD: releng/12.0/sys/dev/fdc/fdc.c 326022 2017-11-20 19:36:21Z pfg $");
57
58 #include "opt_fdc.h"
59
60 #include <sys/param.h>
61 #include <sys/bio.h>
62 #include <sys/bus.h>
63 #include <sys/devicestat.h>
64 #include <sys/disk.h>
65 #include <sys/fcntl.h>
66 #include <sys/fdcio.h>
67 #include <sys/filio.h>
68 #include <sys/kernel.h>
69 #include <sys/kthread.h>
70 #include <sys/lock.h>
71 #include <sys/malloc.h>
72 #include <sys/module.h>
73 #include <sys/mutex.h>
74 #include <sys/priv.h>
75 #include <sys/proc.h>
76 #include <sys/rman.h>
77 #include <sys/sysctl.h>
78 #include <sys/systm.h>
79
80 #include <geom/geom.h>
81
82 #include <machine/bus.h>
83 #include <machine/clock.h>
84 #include <machine/stdarg.h>
85
86 #include <isa/isavar.h>
87 #include <isa/isareg.h>
88 #include <isa/rtc.h>
89 #include <dev/fdc/fdcvar.h>
90
91 #include <dev/ic/nec765.h>
92
93 /*
94 * Runtime configuration hints/flags
95 */
96
97 /* configuration flags for fd */
98 #define FD_TYPEMASK 0x0f /* drive type, matches enum
99 * fd_drivetype; on i386 machines, if
100 * given as 0, use RTC type for fd0
101 * and fd1 */
102 #define FD_NO_CHLINE 0x10 /* drive does not support changeline
103 * aka. unit attention */
104 #define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just
105 * assume it is there */
106
107 /*
108 * Things that could conceiveably considered parameters or tweakables
109 */
110
111 /*
112 * Maximal number of bytes in a cylinder.
113 * This is used for ISADMA bouncebuffer allocation and sets the max
114 * xfersize we support.
115 *
116 * 2.88M format has 2 x 36 x 512, allow for hacked up density.
117 */
118 #define MAX_BYTES_PER_CYL (2 * 40 * 512)
119
120 /*
121 * Timeout value for the PIO loops to wait until the FDC main status
122 * register matches our expectations (request for master, direction
123 * bit). This is supposed to be a number of microseconds, although
124 * timing might actually not be very accurate.
125 *
126 * Timeouts of 100 msec are believed to be required for some broken
127 * (old) hardware.
128 */
129 #define FDSTS_TIMEOUT 100000
130
131 /*
132 * After this many errors, stop whining. Close will reset this count.
133 */
134 #define FDC_ERRMAX 100
135
136 /*
137 * AutoDensity search lists for each drive type.
138 */
139
140 static struct fd_type fd_searchlist_360k[] = {
141 { FDF_5_360 },
142 { 0 }
143 };
144
145 static struct fd_type fd_searchlist_12m[] = {
146 { FDF_5_1200 | FL_AUTO },
147 { FDF_5_400 | FL_AUTO },
148 { FDF_5_360 | FL_2STEP | FL_AUTO},
149 { 0 }
150 };
151
152 static struct fd_type fd_searchlist_720k[] = {
153 { FDF_3_720 },
154 { 0 }
155 };
156
157 static struct fd_type fd_searchlist_144m[] = {
158 { FDF_3_1440 | FL_AUTO},
159 { FDF_3_720 | FL_AUTO},
160 { 0 }
161 };
162
163 static struct fd_type fd_searchlist_288m[] = {
164 { FDF_3_1440 | FL_AUTO },
165 #if 0
166 { FDF_3_2880 | FL_AUTO }, /* XXX: probably doesn't work */
167 #endif
168 { FDF_3_720 | FL_AUTO},
169 { 0 }
170 };
171
172 /*
173 * Order must match enum fd_drivetype in <sys/fdcio.h>.
174 */
175 static struct fd_type *fd_native_types[] = {
176 NULL, /* FDT_NONE */
177 fd_searchlist_360k, /* FDT_360K */
178 fd_searchlist_12m, /* FDT_12M */
179 fd_searchlist_720k, /* FDT_720K */
180 fd_searchlist_144m, /* FDT_144M */
181 fd_searchlist_288m, /* FDT_288M_1 (mapped to FDT_288M) */
182 fd_searchlist_288m, /* FDT_288M */
183 };
184
185 /*
186 * Internals start here
187 */
188
189 /* registers */
190 #define FDOUT 2 /* Digital Output Register (W) */
191 #define FDO_FDSEL 0x03 /* floppy device select */
192 #define FDO_FRST 0x04 /* floppy controller reset */
193 #define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */
194 #define FDO_MOEN0 0x10 /* motor enable drive 0 */
195 #define FDO_MOEN1 0x20 /* motor enable drive 1 */
196 #define FDO_MOEN2 0x40 /* motor enable drive 2 */
197 #define FDO_MOEN3 0x80 /* motor enable drive 3 */
198
199 #define FDSTS 4 /* NEC 765 Main Status Register (R) */
200 #define FDDSR 4 /* Data Rate Select Register (W) */
201 #define FDDATA 5 /* NEC 765 Data Register (R/W) */
202 #define FDCTL 7 /* Control Register (W) */
203
204 /*
205 * The YE-DATA PC Card floppies use PIO to read in the data rather
206 * than DMA due to the wild variability of DMA for the PC Card
207 * devices. DMA was deleted from the PC Card specification in version
208 * 7.2 of the standard, but that post-dates the YE-DATA devices by many
209 * years.
210 *
211 * In addition, if we cannot setup the DMA resources for the ISA
212 * attachment, we'll use this same offset for data transfer. However,
213 * that almost certainly won't work.
214 *
215 * For this mode, offset 0 and 1 must be used to setup the transfer
216 * for this floppy. This is OK for PC Card YE Data devices, but for
217 * ISA this is likely wrong. These registers are only available on
218 * those systems that map them to the floppy drive. Newer systems do
219 * not do this, and we should likely prohibit access to them (or
220 * disallow NODMA to be set).
221 */
222 #define FDBCDR 0 /* And 1 */
223 #define FD_YE_DATAPORT 6 /* Drive Data port */
224
225 #define FDI_DCHG 0x80 /* diskette has been changed */
226 /* requires drive and motor being selected */
227 /* is cleared by any step pulse to drive */
228
229 /*
230 * We have three private BIO commands.
231 */
232 #define BIO_PROBE BIO_CMD0
233 #define BIO_RDID BIO_CMD1
234 #define BIO_FMT BIO_CMD2
235
236 /*
237 * Per drive structure (softc).
238 */
239 struct fd_data {
240 u_char *fd_ioptr; /* IO pointer */
241 u_int fd_iosize; /* Size of IO chunks */
242 u_int fd_iocount; /* Outstanding requests */
243 struct fdc_data *fdc; /* pointer to controller structure */
244 int fdsu; /* this units number on this controller */
245 enum fd_drivetype type; /* drive type */
246 struct fd_type *ft; /* pointer to current type descriptor */
247 struct fd_type fts; /* type descriptors */
248 int sectorsize;
249 int flags;
250 #define FD_WP (1<<0) /* Write protected */
251 #define FD_MOTOR (1<<1) /* motor should be on */
252 #define FD_MOTORWAIT (1<<2) /* motor should be on */
253 #define FD_EMPTY (1<<3) /* no media */
254 #define FD_NEWDISK (1<<4) /* media changed */
255 #define FD_ISADMA (1<<5) /* isa dma started */
256 int track; /* where we think the head is */
257 #define FD_NO_TRACK -2
258 int options; /* FDOPT_* */
259 struct callout toffhandle;
260 struct g_geom *fd_geom;
261 struct g_provider *fd_provider;
262 device_t dev;
263 struct bio_queue_head fd_bq;
264 };
265
266 #define FD_NOT_VALID -2
267
268 static driver_intr_t fdc_intr;
269 static driver_filter_t fdc_intr_fast;
270 static void fdc_reset(struct fdc_data *);
271 static int fd_probe_disk(struct fd_data *, int *);
272
273 static SYSCTL_NODE(_debug, OID_AUTO, fdc, CTLFLAG_RW, 0, "fdc driver");
274
275 static int fifo_threshold = 8;
276 SYSCTL_INT(_debug_fdc, OID_AUTO, fifo, CTLFLAG_RW, &fifo_threshold, 0,
277 "FIFO threshold setting");
278
279 static int debugflags = 0;
280 SYSCTL_INT(_debug_fdc, OID_AUTO, debugflags, CTLFLAG_RW, &debugflags, 0,
281 "Debug flags");
282
283 static int retries = 10;
284 SYSCTL_INT(_debug_fdc, OID_AUTO, retries, CTLFLAG_RW, &retries, 0,
285 "Number of retries to attempt");
286
287 static int spec1 = NE7_SPEC_1(6, 240);
288 SYSCTL_INT(_debug_fdc, OID_AUTO, spec1, CTLFLAG_RW, &spec1, 0,
289 "Specification byte one (step-rate + head unload)");
290
291 static int spec2 = NE7_SPEC_2(16, 0);
292 SYSCTL_INT(_debug_fdc, OID_AUTO, spec2, CTLFLAG_RW, &spec2, 0,
293 "Specification byte two (head load time + no-dma)");
294
295 static int settle;
296 SYSCTL_INT(_debug_fdc, OID_AUTO, settle, CTLFLAG_RW, &settle, 0,
297 "Head settling time in sec/hz");
298
299 static void
300 fdprinttype(struct fd_type *ft)
301 {
302
303 printf("(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,0x%x)",
304 ft->sectrac, ft->secsize, ft->datalen, ft->gap, ft->tracks,
305 ft->size, ft->trans, ft->heads, ft->f_gap, ft->f_inter,
306 ft->offset_side2, ft->flags);
307 }
308
309 static void
310 fdsettype(struct fd_data *fd, struct fd_type *ft)
311 {
312 fd->ft = ft;
313 ft->size = ft->sectrac * ft->heads * ft->tracks;
314 fd->sectorsize = 128 << fd->ft->secsize;
315 }
316
317 /*
318 * Bus space handling (access to low-level IO).
319 */
320 static inline void
321 fdregwr(struct fdc_data *fdc, int reg, uint8_t v)
322 {
323
324 bus_space_write_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg], v);
325 }
326
327 static inline uint8_t
328 fdregrd(struct fdc_data *fdc, int reg)
329 {
330
331 return bus_space_read_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg]);
332 }
333
334 static void
335 fdctl_wr(struct fdc_data *fdc, u_int8_t v)
336 {
337
338 fdregwr(fdc, FDCTL, v);
339 }
340
341 static void
342 fdout_wr(struct fdc_data *fdc, u_int8_t v)
343 {
344
345 fdregwr(fdc, FDOUT, v);
346 }
347
348 static u_int8_t
349 fdsts_rd(struct fdc_data *fdc)
350 {
351
352 return fdregrd(fdc, FDSTS);
353 }
354
355 static void
356 fddsr_wr(struct fdc_data *fdc, u_int8_t v)
357 {
358
359 fdregwr(fdc, FDDSR, v);
360 }
361
362 static void
363 fddata_wr(struct fdc_data *fdc, u_int8_t v)
364 {
365
366 fdregwr(fdc, FDDATA, v);
367 }
368
369 static u_int8_t
370 fddata_rd(struct fdc_data *fdc)
371 {
372
373 return fdregrd(fdc, FDDATA);
374 }
375
376 static u_int8_t
377 fdin_rd(struct fdc_data *fdc)
378 {
379
380 return fdregrd(fdc, FDCTL);
381 }
382
383 /*
384 * Magic pseudo-DMA initialization for YE FDC. Sets count and
385 * direction.
386 */
387 static void
388 fdbcdr_wr(struct fdc_data *fdc, int iswrite, uint16_t count)
389 {
390 fdregwr(fdc, FDBCDR, (count - 1) & 0xff);
391 fdregwr(fdc, FDBCDR + 1,
392 (iswrite ? 0x80 : 0) | (((count - 1) >> 8) & 0x7f));
393 }
394
395 static int
396 fdc_err(struct fdc_data *fdc, const char *s)
397 {
398 fdc->fdc_errs++;
399 if (s) {
400 if (fdc->fdc_errs < FDC_ERRMAX)
401 device_printf(fdc->fdc_dev, "%s", s);
402 else if (fdc->fdc_errs == FDC_ERRMAX)
403 device_printf(fdc->fdc_dev, "too many errors, not "
404 "logging any more\n");
405 }
406
407 return (1);
408 }
409
410 /*
411 * FDC IO functions, take care of the main status register, timeout
412 * in case the desired status bits are never set.
413 *
414 * These PIO loops initially start out with short delays between
415 * each iteration in the expectation that the required condition
416 * is usually met quickly, so it can be handled immediately.
417 */
418 static int
419 fdc_in(struct fdc_data *fdc, int *ptr)
420 {
421 int i, j, step;
422
423 step = 1;
424 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
425 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
426 if (i == (NE7_DIO|NE7_RQM)) {
427 i = fddata_rd(fdc);
428 if (ptr)
429 *ptr = i;
430 return (0);
431 }
432 if (i == NE7_RQM)
433 return (fdc_err(fdc, "ready for output in input\n"));
434 step += step;
435 DELAY(step);
436 }
437 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
438 }
439
440 static int
441 fdc_out(struct fdc_data *fdc, int x)
442 {
443 int i, j, step;
444
445 step = 1;
446 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
447 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
448 if (i == NE7_RQM) {
449 fddata_wr(fdc, x);
450 return (0);
451 }
452 if (i == (NE7_DIO|NE7_RQM))
453 return (fdc_err(fdc, "ready for input in output\n"));
454 step += step;
455 DELAY(step);
456 }
457 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
458 }
459
460 /*
461 * fdc_cmd: Send a command to the chip.
462 * Takes a varargs with this structure:
463 * # of output bytes
464 * output bytes as int [...]
465 * # of input bytes
466 * input bytes as int* [...]
467 */
468 static int
469 fdc_cmd(struct fdc_data *fdc, int n_out, ...)
470 {
471 u_char cmd = 0;
472 int n_in;
473 int n, i;
474 va_list ap;
475
476 va_start(ap, n_out);
477 for (n = 0; n < n_out; n++) {
478 i = va_arg(ap, int);
479 if (n == 0)
480 cmd = i;
481 if (fdc_out(fdc, i) < 0) {
482 char msg[50];
483 snprintf(msg, sizeof(msg),
484 "cmd %x failed at out byte %d of %d\n",
485 cmd, n + 1, n_out);
486 fdc->flags |= FDC_NEEDS_RESET;
487 va_end(ap);
488 return fdc_err(fdc, msg);
489 }
490 }
491 n_in = va_arg(ap, int);
492 for (n = 0; n < n_in; n++) {
493 int *ptr = va_arg(ap, int *);
494 if (fdc_in(fdc, ptr) < 0) {
495 char msg[50];
496 snprintf(msg, sizeof(msg),
497 "cmd %02x failed at in byte %d of %d\n",
498 cmd, n + 1, n_in);
499 fdc->flags |= FDC_NEEDS_RESET;
500 va_end(ap);
501 return fdc_err(fdc, msg);
502 }
503 }
504 va_end(ap);
505 return (0);
506 }
507
508 static void
509 fdc_reset(struct fdc_data *fdc)
510 {
511 int i, r[10];
512
513 if (fdc->fdct == FDC_ENHANCED) {
514 /* Try a software reset, default precomp, and 500 kb/s */
515 fddsr_wr(fdc, I8207X_DSR_SR);
516 } else {
517 /* Try a hardware reset, keep motor on */
518 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
519 DELAY(100);
520 /* enable FDC, but defer interrupts a moment */
521 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
522 }
523 DELAY(100);
524 fdout_wr(fdc, fdc->fdout);
525
526 /* XXX after a reset, silently believe the FDC will accept commands */
527 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, spec1, spec2, 0))
528 device_printf(fdc->fdc_dev, " SPECIFY failed in reset\n");
529
530 if (fdc->fdct == FDC_ENHANCED) {
531 if (fdc_cmd(fdc, 4,
532 I8207X_CONFIG,
533 0,
534 /* 0x40 | */ /* Enable Implied Seek -
535 * breaks 2step! */
536 0x10 | /* Polling disabled */
537 (fifo_threshold - 1), /* Fifo threshold */
538 0x00, /* Precomp track */
539 0))
540 device_printf(fdc->fdc_dev,
541 " CONFIGURE failed in reset\n");
542 if (debugflags & 1) {
543 if (fdc_cmd(fdc, 1,
544 I8207X_DUMPREG,
545 10, &r[0], &r[1], &r[2], &r[3], &r[4],
546 &r[5], &r[6], &r[7], &r[8], &r[9]))
547 device_printf(fdc->fdc_dev,
548 " DUMPREG failed in reset\n");
549 for (i = 0; i < 10; i++)
550 printf(" %02x", r[i]);
551 printf("\n");
552 }
553 }
554 }
555
556 static int
557 fdc_sense_drive(struct fdc_data *fdc, int *st3p)
558 {
559 int st3;
560
561 if (fdc_cmd(fdc, 2, NE7CMD_SENSED, fdc->fd->fdsu, 1, &st3))
562 return (fdc_err(fdc, "Sense Drive Status failed\n"));
563 if (st3p)
564 *st3p = st3;
565 return (0);
566 }
567
568 static int
569 fdc_sense_int(struct fdc_data *fdc, int *st0p, int *cylp)
570 {
571 int cyl, st0, ret;
572
573 ret = fdc_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
574 if (ret) {
575 (void)fdc_err(fdc, "sense intr err reading stat reg 0\n");
576 return (ret);
577 }
578
579 if (st0p)
580 *st0p = st0;
581
582 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
583 /*
584 * There doesn't seem to have been an interrupt.
585 */
586 return (FD_NOT_VALID);
587 }
588
589 if (fdc_in(fdc, &cyl) < 0)
590 return fdc_err(fdc, "can't get cyl num\n");
591
592 if (cylp)
593 *cylp = cyl;
594
595 return (0);
596 }
597
598 static int
599 fdc_read_status(struct fdc_data *fdc)
600 {
601 int i, ret, status;
602
603 for (i = ret = 0; i < 7; i++) {
604 ret = fdc_in(fdc, &status);
605 fdc->status[i] = status;
606 if (ret != 0)
607 break;
608 }
609
610 if (ret == 0)
611 fdc->flags |= FDC_STAT_VALID;
612 else
613 fdc->flags &= ~FDC_STAT_VALID;
614
615 return ret;
616 }
617
618 /*
619 * Select this drive
620 */
621 static void
622 fd_select(struct fd_data *fd)
623 {
624 struct fdc_data *fdc;
625
626 /* XXX: lock controller */
627 fdc = fd->fdc;
628 fdc->fdout &= ~FDO_FDSEL;
629 fdc->fdout |= FDO_FDMAEN | FDO_FRST | fd->fdsu;
630 fdout_wr(fdc, fdc->fdout);
631 }
632
633 static void
634 fd_turnon(void *arg)
635 {
636 struct fd_data *fd;
637 struct bio *bp;
638 int once;
639
640 fd = arg;
641 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
642 fd->flags &= ~FD_MOTORWAIT;
643 fd->flags |= FD_MOTOR;
644 once = 0;
645 for (;;) {
646 bp = bioq_takefirst(&fd->fd_bq);
647 if (bp == NULL)
648 break;
649 bioq_disksort(&fd->fdc->head, bp);
650 once = 1;
651 }
652 if (once)
653 wakeup(&fd->fdc->head);
654 }
655
656 static void
657 fd_motor(struct fd_data *fd, int turnon)
658 {
659 struct fdc_data *fdc;
660
661 fdc = fd->fdc;
662 /*
663 mtx_assert(&fdc->fdc_mtx, MA_OWNED);
664 */
665 if (turnon) {
666 fd->flags |= FD_MOTORWAIT;
667 fdc->fdout |= (FDO_MOEN0 << fd->fdsu);
668 callout_reset(&fd->toffhandle, hz, fd_turnon, fd);
669 } else {
670 callout_stop(&fd->toffhandle);
671 fd->flags &= ~(FD_MOTOR|FD_MOTORWAIT);
672 fdc->fdout &= ~(FDO_MOEN0 << fd->fdsu);
673 }
674 fdout_wr(fdc, fdc->fdout);
675 }
676
677 static void
678 fd_turnoff(void *xfd)
679 {
680 struct fd_data *fd = xfd;
681
682 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
683 fd_motor(fd, 0);
684 }
685
686 /*
687 * fdc_intr - wake up the worker thread.
688 */
689
690 static void
691 fdc_intr(void *arg)
692 {
693
694 wakeup(arg);
695 }
696
697 static int
698 fdc_intr_fast(void *arg)
699 {
700
701 wakeup(arg);
702 return(FILTER_HANDLED);
703 }
704
705 /*
706 * fdc_pio(): perform programmed IO read/write for YE PCMCIA floppy.
707 */
708 static void
709 fdc_pio(struct fdc_data *fdc)
710 {
711 u_char *cptr;
712 struct bio *bp;
713 u_int count;
714
715 bp = fdc->bp;
716 cptr = fdc->fd->fd_ioptr;
717 count = fdc->fd->fd_iosize;
718
719 if (bp->bio_cmd == BIO_READ) {
720 fdbcdr_wr(fdc, 0, count);
721 bus_space_read_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
722 fdc->ioff[FD_YE_DATAPORT], cptr, count);
723 } else {
724 bus_space_write_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
725 fdc->ioff[FD_YE_DATAPORT], cptr, count);
726 fdbcdr_wr(fdc, 0, count); /* needed? */
727 }
728 }
729
730 static int
731 fdc_biodone(struct fdc_data *fdc, int error)
732 {
733 struct fd_data *fd;
734 struct bio *bp;
735
736 fd = fdc->fd;
737 bp = fdc->bp;
738
739 mtx_lock(&fdc->fdc_mtx);
740 if (--fd->fd_iocount == 0)
741 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
742 fdc->bp = NULL;
743 fdc->fd = NULL;
744 mtx_unlock(&fdc->fdc_mtx);
745 if (bp->bio_to != NULL) {
746 if ((debugflags & 2) && fd->fdc->retry > 0)
747 printf("retries: %d\n", fd->fdc->retry);
748 g_io_deliver(bp, error);
749 return (0);
750 }
751 bp->bio_error = error;
752 bp->bio_flags |= BIO_DONE;
753 wakeup(bp);
754 return (0);
755 }
756
757 static int retry_line;
758
759 static int
760 fdc_worker(struct fdc_data *fdc)
761 {
762 struct fd_data *fd;
763 struct bio *bp;
764 int i, nsect;
765 int st0, st3, cyl, mfm, steptrac, cylinder, descyl, sec;
766 int head;
767 int override_error;
768 static int need_recal;
769 struct fdc_readid *idp;
770 struct fd_formb *finfo;
771
772 override_error = 0;
773
774 /* Have we exhausted our retries ? */
775 bp = fdc->bp;
776 fd = fdc->fd;
777 if (bp != NULL &&
778 (fdc->retry >= retries || (fd->options & FDOPT_NORETRY))) {
779 if ((debugflags & 4))
780 printf("Too many retries (EIO)\n");
781 if (fdc->flags & FDC_NEEDS_RESET) {
782 mtx_lock(&fdc->fdc_mtx);
783 fd->flags |= FD_EMPTY;
784 mtx_unlock(&fdc->fdc_mtx);
785 }
786 return (fdc_biodone(fdc, EIO));
787 }
788
789 /* Disable ISADMA if we bailed while it was active */
790 if (fd != NULL && (fd->flags & FD_ISADMA)) {
791 isa_dmadone(
792 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
793 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
794 mtx_lock(&fdc->fdc_mtx);
795 fd->flags &= ~FD_ISADMA;
796 mtx_unlock(&fdc->fdc_mtx);
797 }
798
799 /* Unwedge the controller ? */
800 if (fdc->flags & FDC_NEEDS_RESET) {
801 fdc->flags &= ~FDC_NEEDS_RESET;
802 fdc_reset(fdc);
803 if (cold)
804 DELAY(1000000);
805 else
806 tsleep(fdc, PRIBIO, "fdcrst", hz);
807 /* Discard results */
808 for (i = 0; i < 4; i++)
809 fdc_sense_int(fdc, &st0, &cyl);
810 /* All drives must recal */
811 need_recal = 0xf;
812 }
813
814 /* Pick up a request, if need be wait for it */
815 if (fdc->bp == NULL) {
816 mtx_lock(&fdc->fdc_mtx);
817 do {
818 fdc->bp = bioq_takefirst(&fdc->head);
819 if (fdc->bp == NULL)
820 msleep(&fdc->head, &fdc->fdc_mtx,
821 PRIBIO, "-", 0);
822 } while (fdc->bp == NULL &&
823 (fdc->flags & FDC_KTHREAD_EXIT) == 0);
824 mtx_unlock(&fdc->fdc_mtx);
825
826 if (fdc->bp == NULL)
827 /*
828 * Nothing to do, worker thread has been
829 * requested to stop.
830 */
831 return (0);
832
833 bp = fdc->bp;
834 fd = fdc->fd = bp->bio_driver1;
835 fdc->retry = 0;
836 fd->fd_ioptr = bp->bio_data;
837 if (bp->bio_cmd == BIO_FMT) {
838 i = offsetof(struct fd_formb, fd_formb_cylno(0));
839 fd->fd_ioptr += i;
840 fd->fd_iosize = bp->bio_length - i;
841 }
842 }
843
844 /* Select drive, setup params */
845 fd_select(fd);
846 if (fdc->fdct == FDC_ENHANCED)
847 fddsr_wr(fdc, fd->ft->trans);
848 else
849 fdctl_wr(fdc, fd->ft->trans);
850
851 if (bp->bio_cmd == BIO_PROBE) {
852 if ((!(device_get_flags(fd->dev) & FD_NO_CHLINE) &&
853 !(fdin_rd(fdc) & FDI_DCHG) &&
854 !(fd->flags & FD_EMPTY)) ||
855 fd_probe_disk(fd, &need_recal) == 0)
856 return (fdc_biodone(fdc, 0));
857 return (1);
858 }
859
860 /*
861 * If we are dead just flush the requests
862 */
863 if (fd->flags & FD_EMPTY)
864 return (fdc_biodone(fdc, ENXIO));
865
866 /* Check if we lost our media */
867 if (fdin_rd(fdc) & FDI_DCHG) {
868 if (debugflags & 0x40)
869 printf("Lost disk\n");
870 mtx_lock(&fdc->fdc_mtx);
871 fd->flags |= FD_EMPTY;
872 fd->flags |= FD_NEWDISK;
873 mtx_unlock(&fdc->fdc_mtx);
874 g_topology_lock();
875 g_orphan_provider(fd->fd_provider, ENXIO);
876 fd->fd_provider->flags |= G_PF_WITHER;
877 fd->fd_provider =
878 g_new_providerf(fd->fd_geom, "%s", fd->fd_geom->name);
879 g_error_provider(fd->fd_provider, 0);
880 g_topology_unlock();
881 return (fdc_biodone(fdc, ENXIO));
882 }
883
884 /* Check if the floppy is write-protected */
885 if (bp->bio_cmd == BIO_FMT || bp->bio_cmd == BIO_WRITE) {
886 retry_line = __LINE__;
887 if(fdc_sense_drive(fdc, &st3) != 0)
888 return (1);
889 if(st3 & NE7_ST3_WP)
890 return (fdc_biodone(fdc, EROFS));
891 }
892
893 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0;
894 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1;
895 i = fd->ft->sectrac * fd->ft->heads;
896 cylinder = bp->bio_pblkno / i;
897 descyl = cylinder * steptrac;
898 sec = bp->bio_pblkno % i;
899 nsect = i - sec;
900 head = sec / fd->ft->sectrac;
901 sec = sec % fd->ft->sectrac + 1;
902
903 /* If everything is going swimmingly, use multisector xfer */
904 if (fdc->retry == 0 &&
905 (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE)) {
906 fd->fd_iosize = imin(nsect * fd->sectorsize, bp->bio_resid);
907 nsect = fd->fd_iosize / fd->sectorsize;
908 } else if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) {
909 fd->fd_iosize = fd->sectorsize;
910 nsect = 1;
911 }
912
913 /* Do RECAL if we need to or are going to track zero anyway */
914 if ((need_recal & (1 << fd->fdsu)) ||
915 (cylinder == 0 && fd->track != 0) ||
916 fdc->retry > 2) {
917 retry_line = __LINE__;
918 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
919 return (1);
920 tsleep(fdc, PRIBIO, "fdrecal", hz);
921 retry_line = __LINE__;
922 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
923 return (1); /* XXX */
924 retry_line = __LINE__;
925 if ((st0 & 0xc0) || cyl != 0)
926 return (1);
927 need_recal &= ~(1 << fd->fdsu);
928 fd->track = 0;
929 /* let the heads settle */
930 if (settle)
931 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
932 }
933
934 /*
935 * SEEK to where we want to be
936 */
937 if (cylinder != fd->track) {
938 retry_line = __LINE__;
939 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, descyl, 0))
940 return (1);
941 tsleep(fdc, PRIBIO, "fdseek", hz);
942 retry_line = __LINE__;
943 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
944 return (1); /* XXX */
945 retry_line = __LINE__;
946 if ((st0 & 0xc0) || cyl != descyl) {
947 need_recal |= (1 << fd->fdsu);
948 return (1);
949 }
950 /* let the heads settle */
951 if (settle)
952 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
953 }
954 fd->track = cylinder;
955
956 if (debugflags & 8)
957 printf("op %x bn %ju siz %u ptr %p retry %d\n",
958 bp->bio_cmd, bp->bio_pblkno, fd->fd_iosize,
959 fd->fd_ioptr, fdc->retry);
960
961 /* Setup ISADMA if we need it and have it */
962 if ((bp->bio_cmd == BIO_READ ||
963 bp->bio_cmd == BIO_WRITE ||
964 bp->bio_cmd == BIO_FMT)
965 && !(fdc->flags & FDC_NODMA)) {
966 isa_dmastart(
967 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
968 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
969 mtx_lock(&fdc->fdc_mtx);
970 fd->flags |= FD_ISADMA;
971 mtx_unlock(&fdc->fdc_mtx);
972 }
973
974 /* Do PIO if we have to */
975 if (fdc->flags & FDC_NODMA) {
976 if (bp->bio_cmd == BIO_READ ||
977 bp->bio_cmd == BIO_WRITE ||
978 bp->bio_cmd == BIO_FMT)
979 fdbcdr_wr(fdc, 1, fd->fd_iosize);
980 if (bp->bio_cmd == BIO_WRITE ||
981 bp->bio_cmd == BIO_FMT)
982 fdc_pio(fdc);
983 }
984
985 switch(bp->bio_cmd) {
986 case BIO_FMT:
987 /* formatting */
988 finfo = (struct fd_formb *)bp->bio_data;
989 retry_line = __LINE__;
990 if (fdc_cmd(fdc, 6,
991 NE7CMD_FORMAT | mfm,
992 head << 2 | fd->fdsu,
993 finfo->fd_formb_secshift,
994 finfo->fd_formb_nsecs,
995 finfo->fd_formb_gaplen,
996 finfo->fd_formb_fillbyte, 0))
997 return (1);
998 break;
999 case BIO_RDID:
1000 retry_line = __LINE__;
1001 if (fdc_cmd(fdc, 2,
1002 NE7CMD_READID | mfm,
1003 head << 2 | fd->fdsu, 0))
1004 return (1);
1005 break;
1006 case BIO_READ:
1007 retry_line = __LINE__;
1008 if (fdc_cmd(fdc, 9,
1009 NE7CMD_READ | NE7CMD_SK | mfm | NE7CMD_MT,
1010 head << 2 | fd->fdsu, /* head & unit */
1011 fd->track, /* track */
1012 head, /* head */
1013 sec, /* sector + 1 */
1014 fd->ft->secsize, /* sector size */
1015 fd->ft->sectrac, /* sectors/track */
1016 fd->ft->gap, /* gap size */
1017 fd->ft->datalen, /* data length */
1018 0))
1019 return (1);
1020 break;
1021 case BIO_WRITE:
1022 retry_line = __LINE__;
1023 if (fdc_cmd(fdc, 9,
1024 NE7CMD_WRITE | mfm | NE7CMD_MT,
1025 head << 2 | fd->fdsu, /* head & unit */
1026 fd->track, /* track */
1027 head, /* head */
1028 sec, /* sector + 1 */
1029 fd->ft->secsize, /* sector size */
1030 fd->ft->sectrac, /* sectors/track */
1031 fd->ft->gap, /* gap size */
1032 fd->ft->datalen, /* data length */
1033 0))
1034 return (1);
1035 break;
1036 default:
1037 KASSERT(0 == 1, ("Wrong bio_cmd %x\n", bp->bio_cmd));
1038 }
1039
1040 /* Wait for interrupt */
1041 i = tsleep(fdc, PRIBIO, "fddata", hz);
1042
1043 /* PIO if the read looks good */
1044 if (i == 0 && (fdc->flags & FDC_NODMA) && (bp->bio_cmd == BIO_READ))
1045 fdc_pio(fdc);
1046
1047 /* Finish DMA */
1048 if (fd->flags & FD_ISADMA) {
1049 isa_dmadone(
1050 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
1051 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
1052 mtx_lock(&fdc->fdc_mtx);
1053 fd->flags &= ~FD_ISADMA;
1054 mtx_unlock(&fdc->fdc_mtx);
1055 }
1056
1057 if (i != 0) {
1058 /*
1059 * Timeout.
1060 *
1061 * Due to IBM's brain-dead design, the FDC has a faked ready
1062 * signal, hardwired to ready == true. Thus, any command
1063 * issued if there's no diskette in the drive will _never_
1064 * complete, and must be aborted by resetting the FDC.
1065 * Many thanks, Big Blue!
1066 */
1067 retry_line = __LINE__;
1068 fdc->flags |= FDC_NEEDS_RESET;
1069 return (1);
1070 }
1071
1072 retry_line = __LINE__;
1073 if (fdc_read_status(fdc))
1074 return (1);
1075
1076 if (debugflags & 0x10)
1077 printf(" -> %x %x %x %x\n",
1078 fdc->status[0], fdc->status[1],
1079 fdc->status[2], fdc->status[3]);
1080
1081 st0 = fdc->status[0] & NE7_ST0_IC;
1082 if (st0 != 0) {
1083 retry_line = __LINE__;
1084 if (st0 == NE7_ST0_IC_AT && fdc->status[1] & NE7_ST1_OR) {
1085 /*
1086 * DMA overrun. Someone hogged the bus and
1087 * didn't release it in time for the next
1088 * FDC transfer.
1089 */
1090 return (1);
1091 }
1092 retry_line = __LINE__;
1093 if(st0 == NE7_ST0_IC_IV) {
1094 fdc->flags |= FDC_NEEDS_RESET;
1095 return (1);
1096 }
1097 retry_line = __LINE__;
1098 if(st0 == NE7_ST0_IC_AT && fdc->status[2] & NE7_ST2_WC) {
1099 need_recal |= (1 << fd->fdsu);
1100 return (1);
1101 }
1102 if (debugflags & 0x20) {
1103 printf("status %02x %02x %02x %02x %02x %02x\n",
1104 fdc->status[0], fdc->status[1], fdc->status[2],
1105 fdc->status[3], fdc->status[4], fdc->status[5]);
1106 }
1107 retry_line = __LINE__;
1108 if (fd->options & FDOPT_NOERROR)
1109 override_error = 1;
1110 else
1111 return (1);
1112 }
1113 /* All OK */
1114 switch(bp->bio_cmd) {
1115 case BIO_RDID:
1116 /* copy out ID field contents */
1117 idp = (struct fdc_readid *)bp->bio_data;
1118 idp->cyl = fdc->status[3];
1119 idp->head = fdc->status[4];
1120 idp->sec = fdc->status[5];
1121 idp->secshift = fdc->status[6];
1122 if (debugflags & 0x40)
1123 printf("c %d h %d s %d z %d\n",
1124 idp->cyl, idp->head, idp->sec, idp->secshift);
1125 break;
1126 case BIO_READ:
1127 case BIO_WRITE:
1128 bp->bio_pblkno += nsect;
1129 bp->bio_resid -= fd->fd_iosize;
1130 bp->bio_completed += fd->fd_iosize;
1131 fd->fd_ioptr += fd->fd_iosize;
1132 if (override_error) {
1133 if ((debugflags & 4))
1134 printf("FDOPT_NOERROR: returning bad data\n");
1135 } else {
1136 /* Since we managed to get something done,
1137 * reset the retry */
1138 fdc->retry = 0;
1139 if (bp->bio_resid > 0)
1140 return (0);
1141 }
1142 break;
1143 case BIO_FMT:
1144 break;
1145 }
1146 return (fdc_biodone(fdc, 0));
1147 }
1148
1149 static void
1150 fdc_thread(void *arg)
1151 {
1152 struct fdc_data *fdc;
1153
1154 fdc = arg;
1155 int i;
1156
1157 mtx_lock(&fdc->fdc_mtx);
1158 fdc->flags |= FDC_KTHREAD_ALIVE;
1159 while ((fdc->flags & FDC_KTHREAD_EXIT) == 0) {
1160 mtx_unlock(&fdc->fdc_mtx);
1161 i = fdc_worker(fdc);
1162 if (i && debugflags & 0x20) {
1163 if (fdc->bp != NULL) {
1164 g_print_bio(fdc->bp);
1165 printf("\n");
1166 }
1167 printf("Retry line %d\n", retry_line);
1168 }
1169 fdc->retry += i;
1170 mtx_lock(&fdc->fdc_mtx);
1171 }
1172 fdc->flags &= ~(FDC_KTHREAD_EXIT | FDC_KTHREAD_ALIVE);
1173 mtx_unlock(&fdc->fdc_mtx);
1174
1175 kproc_exit(0);
1176 }
1177
1178 /*
1179 * Enqueue a request.
1180 */
1181 static void
1182 fd_enqueue(struct fd_data *fd, struct bio *bp)
1183 {
1184 struct fdc_data *fdc;
1185 int call;
1186
1187 call = 0;
1188 fdc = fd->fdc;
1189 mtx_lock(&fdc->fdc_mtx);
1190 /* If we go from idle, cancel motor turnoff */
1191 if (fd->fd_iocount++ == 0)
1192 callout_stop(&fd->toffhandle);
1193 if (fd->flags & FD_MOTOR) {
1194 /* The motor is on, send it directly to the controller */
1195 bioq_disksort(&fdc->head, bp);
1196 wakeup(&fdc->head);
1197 } else {
1198 /* Queue it on the drive until the motor has started */
1199 bioq_insert_tail(&fd->fd_bq, bp);
1200 if (!(fd->flags & FD_MOTORWAIT))
1201 fd_motor(fd, 1);
1202 }
1203 mtx_unlock(&fdc->fdc_mtx);
1204 }
1205
1206 /*
1207 * Try to find out if we have a disk in the drive.
1208 */
1209 static int
1210 fd_probe_disk(struct fd_data *fd, int *recal)
1211 {
1212 struct fdc_data *fdc;
1213 int st0, st3, cyl;
1214 int oopts, ret;
1215
1216 fdc = fd->fdc;
1217 oopts = fd->options;
1218 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1219 ret = 1;
1220
1221 /*
1222 * First recal, then seek to cyl#1, this clears the old condition on
1223 * the disk change line so we can examine it for current status.
1224 */
1225 if (debugflags & 0x40)
1226 printf("New disk in probe\n");
1227 mtx_lock(&fdc->fdc_mtx);
1228 fd->flags |= FD_NEWDISK;
1229 mtx_unlock(&fdc->fdc_mtx);
1230 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
1231 goto done;
1232 tsleep(fdc, PRIBIO, "fdrecal", hz);
1233 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1234 goto done; /* XXX */
1235 if ((st0 & 0xc0) || cyl != 0)
1236 goto done;
1237
1238 /* Seek to track 1 */
1239 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, 1, 0))
1240 goto done;
1241 tsleep(fdc, PRIBIO, "fdseek", hz);
1242 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1243 goto done; /* XXX */
1244 *recal |= (1 << fd->fdsu);
1245 if (fdin_rd(fdc) & FDI_DCHG) {
1246 if (debugflags & 0x40)
1247 printf("Empty in probe\n");
1248 mtx_lock(&fdc->fdc_mtx);
1249 fd->flags |= FD_EMPTY;
1250 mtx_unlock(&fdc->fdc_mtx);
1251 } else {
1252 if (fdc_sense_drive(fdc, &st3) != 0)
1253 goto done;
1254 if (debugflags & 0x40)
1255 printf("Got disk in probe\n");
1256 mtx_lock(&fdc->fdc_mtx);
1257 fd->flags &= ~FD_EMPTY;
1258 if (st3 & NE7_ST3_WP)
1259 fd->flags |= FD_WP;
1260 else
1261 fd->flags &= ~FD_WP;
1262 mtx_unlock(&fdc->fdc_mtx);
1263 }
1264 ret = 0;
1265
1266 done:
1267 fd->options = oopts;
1268 return (ret);
1269 }
1270
1271 static int
1272 fdmisccmd(struct fd_data *fd, u_int cmd, void *data)
1273 {
1274 struct bio *bp;
1275 struct fd_formb *finfo;
1276 struct fdc_readid *idfield;
1277 int error;
1278
1279 bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO);
1280
1281 /*
1282 * Set up a bio request for fdstrategy(). bio_offset is faked
1283 * so that fdstrategy() will seek to the requested
1284 * cylinder, and use the desired head.
1285 */
1286 bp->bio_cmd = cmd;
1287 if (cmd == BIO_FMT) {
1288 finfo = (struct fd_formb *)data;
1289 bp->bio_pblkno =
1290 (finfo->cyl * fd->ft->heads + finfo->head) *
1291 fd->ft->sectrac;
1292 bp->bio_length = sizeof *finfo;
1293 } else if (cmd == BIO_RDID) {
1294 idfield = (struct fdc_readid *)data;
1295 bp->bio_pblkno =
1296 (idfield->cyl * fd->ft->heads + idfield->head) *
1297 fd->ft->sectrac;
1298 bp->bio_length = sizeof(struct fdc_readid);
1299 } else if (cmd == BIO_PROBE) {
1300 /* nothing */
1301 } else
1302 panic("wrong cmd in fdmisccmd()");
1303 bp->bio_offset = bp->bio_pblkno * fd->sectorsize;
1304 bp->bio_data = data;
1305 bp->bio_driver1 = fd;
1306 bp->bio_flags = 0;
1307
1308 fd_enqueue(fd, bp);
1309
1310 do {
1311 tsleep(bp, PRIBIO, "fdwait", hz);
1312 } while (!(bp->bio_flags & BIO_DONE));
1313 error = bp->bio_error;
1314
1315 free(bp, M_TEMP);
1316 return (error);
1317 }
1318
1319 /*
1320 * Try figuring out the density of the media present in our device.
1321 */
1322 static int
1323 fdautoselect(struct fd_data *fd)
1324 {
1325 struct fd_type *fdtp;
1326 struct fdc_readid id;
1327 int oopts, rv;
1328
1329 if (!(fd->ft->flags & FL_AUTO))
1330 return (0);
1331
1332 fdtp = fd_native_types[fd->type];
1333 fdsettype(fd, fdtp);
1334 if (!(fd->ft->flags & FL_AUTO))
1335 return (0);
1336
1337 /*
1338 * Try reading sector ID fields, first at cylinder 0, head 0,
1339 * then at cylinder 2, head N. We don't probe cylinder 1,
1340 * since for 5.25in DD media in a HD drive, there are no data
1341 * to read (2 step pulses per media cylinder required). For
1342 * two-sided media, the second probe always goes to head 1, so
1343 * we can tell them apart from single-sided media. As a
1344 * side-effect this means that single-sided media should be
1345 * mentioned in the search list after two-sided media of an
1346 * otherwise identical density. Media with a different number
1347 * of sectors per track but otherwise identical parameters
1348 * cannot be distinguished at all.
1349 *
1350 * If we successfully read an ID field on both cylinders where
1351 * the recorded values match our expectation, we are done.
1352 * Otherwise, we try the next density entry from the table.
1353 *
1354 * Stepping to cylinder 2 has the side-effect of clearing the
1355 * unit attention bit.
1356 */
1357 oopts = fd->options;
1358 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1359 for (; fdtp->heads; fdtp++) {
1360 fdsettype(fd, fdtp);
1361
1362 id.cyl = id.head = 0;
1363 rv = fdmisccmd(fd, BIO_RDID, &id);
1364 if (rv != 0)
1365 continue;
1366 if (id.cyl != 0 || id.head != 0 || id.secshift != fdtp->secsize)
1367 continue;
1368 id.cyl = 2;
1369 id.head = fd->ft->heads - 1;
1370 rv = fdmisccmd(fd, BIO_RDID, &id);
1371 if (id.cyl != 2 || id.head != fdtp->heads - 1 ||
1372 id.secshift != fdtp->secsize)
1373 continue;
1374 if (rv == 0)
1375 break;
1376 }
1377
1378 fd->options = oopts;
1379 if (fdtp->heads == 0) {
1380 if (debugflags & 0x40)
1381 device_printf(fd->dev, "autoselection failed\n");
1382 fdsettype(fd, fd_native_types[fd->type]);
1383 return (-1);
1384 } else {
1385 if (debugflags & 0x40) {
1386 device_printf(fd->dev,
1387 "autoselected %d KB medium\n",
1388 fd->ft->size / 2);
1389 fdprinttype(fd->ft);
1390 }
1391 return (0);
1392 }
1393 }
1394
1395 /*
1396 * GEOM class implementation
1397 */
1398
1399 static g_access_t fd_access;
1400 static g_start_t fd_start;
1401 static g_ioctl_t fd_ioctl;
1402
1403 struct g_class g_fd_class = {
1404 .name = "FD",
1405 .version = G_VERSION,
1406 .start = fd_start,
1407 .access = fd_access,
1408 .ioctl = fd_ioctl,
1409 };
1410
1411 static int
1412 fd_access(struct g_provider *pp, int r, int w, int e)
1413 {
1414 struct fd_data *fd;
1415 struct fdc_data *fdc;
1416 int ar, aw, ae;
1417 int busy;
1418
1419 fd = pp->geom->softc;
1420 fdc = fd->fdc;
1421
1422 /*
1423 * If our provider is withering, we can only get negative requests
1424 * and we don't want to even see them
1425 */
1426 if (pp->flags & G_PF_WITHER)
1427 return (0);
1428
1429 ar = r + pp->acr;
1430 aw = w + pp->acw;
1431 ae = e + pp->ace;
1432
1433 if (ar == 0 && aw == 0 && ae == 0) {
1434 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR);
1435 device_unbusy(fd->dev);
1436 return (0);
1437 }
1438
1439 busy = 0;
1440 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) {
1441 if (fdmisccmd(fd, BIO_PROBE, NULL))
1442 return (ENXIO);
1443 if (fd->flags & FD_EMPTY)
1444 return (ENXIO);
1445 if (fd->flags & FD_NEWDISK) {
1446 if (fdautoselect(fd) != 0 &&
1447 (device_get_flags(fd->dev) & FD_NO_CHLINE)) {
1448 mtx_lock(&fdc->fdc_mtx);
1449 fd->flags |= FD_EMPTY;
1450 mtx_unlock(&fdc->fdc_mtx);
1451 return (ENXIO);
1452 }
1453 mtx_lock(&fdc->fdc_mtx);
1454 fd->flags &= ~FD_NEWDISK;
1455 mtx_unlock(&fdc->fdc_mtx);
1456 }
1457 device_busy(fd->dev);
1458 busy = 1;
1459 }
1460
1461 if (w > 0 && (fd->flags & FD_WP)) {
1462 if (busy)
1463 device_unbusy(fd->dev);
1464 return (EROFS);
1465 }
1466
1467 pp->sectorsize = fd->sectorsize;
1468 pp->stripesize = fd->ft->heads * fd->ft->sectrac * fd->sectorsize;
1469 pp->mediasize = pp->stripesize * fd->ft->tracks;
1470 return (0);
1471 }
1472
1473 static void
1474 fd_start(struct bio *bp)
1475 {
1476 struct fdc_data * fdc;
1477 struct fd_data * fd;
1478
1479 fd = bp->bio_to->geom->softc;
1480 fdc = fd->fdc;
1481 bp->bio_driver1 = fd;
1482 if (bp->bio_cmd == BIO_GETATTR) {
1483 if (g_handleattr_int(bp, "GEOM::fwsectors", fd->ft->sectrac))
1484 return;
1485 if (g_handleattr_int(bp, "GEOM::fwheads", fd->ft->heads))
1486 return;
1487 g_io_deliver(bp, ENOIOCTL);
1488 return;
1489 }
1490 if (!(bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE)) {
1491 g_io_deliver(bp, EOPNOTSUPP);
1492 return;
1493 }
1494 bp->bio_pblkno = bp->bio_offset / fd->sectorsize;
1495 bp->bio_resid = bp->bio_length;
1496 fd_enqueue(fd, bp);
1497 return;
1498 }
1499
1500 static int
1501 fd_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td)
1502 {
1503 struct fd_data *fd;
1504 struct fdc_status *fsp;
1505 struct fdc_readid *rid;
1506 int error;
1507
1508 fd = pp->geom->softc;
1509
1510 switch (cmd) {
1511 case FD_GTYPE: /* get drive type */
1512 *(struct fd_type *)data = *fd->ft;
1513 return (0);
1514
1515 case FD_STYPE: /* set drive type */
1516 /*
1517 * Allow setting drive type temporarily iff
1518 * currently unset. Used for fdformat so any
1519 * user can set it, and then start formatting.
1520 */
1521 fd->fts = *(struct fd_type *)data;
1522 if (fd->fts.sectrac) {
1523 /* XXX: check for rubbish */
1524 fdsettype(fd, &fd->fts);
1525 } else {
1526 fdsettype(fd, fd_native_types[fd->type]);
1527 }
1528 if (debugflags & 0x40)
1529 fdprinttype(fd->ft);
1530 return (0);
1531
1532 case FD_GOPTS: /* get drive options */
1533 *(int *)data = fd->options;
1534 return (0);
1535
1536 case FD_SOPTS: /* set drive options */
1537 fd->options = *(int *)data;
1538 return (0);
1539
1540 case FD_CLRERR:
1541 error = priv_check(td, PRIV_DRIVER);
1542 if (error)
1543 return (error);
1544 fd->fdc->fdc_errs = 0;
1545 return (0);
1546
1547 case FD_GSTAT:
1548 fsp = (struct fdc_status *)data;
1549 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
1550 return (EINVAL);
1551 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
1552 return (0);
1553
1554 case FD_GDTYPE:
1555 *(enum fd_drivetype *)data = fd->type;
1556 return (0);
1557
1558 case FD_FORM:
1559 if (!(fflag & FWRITE))
1560 return (EPERM);
1561 if (((struct fd_formb *)data)->format_version !=
1562 FD_FORMAT_VERSION)
1563 return (EINVAL); /* wrong version of formatting prog */
1564 error = fdmisccmd(fd, BIO_FMT, data);
1565 mtx_lock(&fd->fdc->fdc_mtx);
1566 fd->flags |= FD_NEWDISK;
1567 mtx_unlock(&fd->fdc->fdc_mtx);
1568 break;
1569
1570 case FD_READID:
1571 rid = (struct fdc_readid *)data;
1572 if (rid->cyl > 85 || rid->head > 1)
1573 return (EINVAL);
1574 error = fdmisccmd(fd, BIO_RDID, data);
1575 break;
1576
1577 case FIONBIO:
1578 case FIOASYNC:
1579 /* For backwards compat with old fd*(8) tools */
1580 error = 0;
1581 break;
1582
1583 default:
1584 if (debugflags & 0x80)
1585 printf("Unknown ioctl %lx\n", cmd);
1586 error = ENOIOCTL;
1587 break;
1588 }
1589 return (error);
1590 };
1591
1592
1593
1594 /*
1595 * Configuration/initialization stuff, per controller.
1596 */
1597
1598 devclass_t fdc_devclass;
1599 static devclass_t fd_devclass;
1600
1601 struct fdc_ivars {
1602 int fdunit;
1603 int fdtype;
1604 };
1605
1606 void
1607 fdc_release_resources(struct fdc_data *fdc)
1608 {
1609 device_t dev;
1610 struct resource *last;
1611 int i;
1612
1613 dev = fdc->fdc_dev;
1614 if (fdc->fdc_intr)
1615 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1616 fdc->fdc_intr = NULL;
1617 if (fdc->res_irq != NULL)
1618 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
1619 fdc->res_irq);
1620 fdc->res_irq = NULL;
1621 last = NULL;
1622 for (i = 0; i < FDC_MAXREG; i++) {
1623 if (fdc->resio[i] != NULL && fdc->resio[i] != last) {
1624 bus_release_resource(dev, SYS_RES_IOPORT,
1625 fdc->ridio[i], fdc->resio[i]);
1626 last = fdc->resio[i];
1627 fdc->resio[i] = NULL;
1628 }
1629 }
1630 if (fdc->res_drq != NULL)
1631 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
1632 fdc->res_drq);
1633 fdc->res_drq = NULL;
1634 }
1635
1636 int
1637 fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
1638 {
1639 struct fdc_ivars *ivars = device_get_ivars(child);
1640
1641 switch (which) {
1642 case FDC_IVAR_FDUNIT:
1643 *result = ivars->fdunit;
1644 break;
1645 case FDC_IVAR_FDTYPE:
1646 *result = ivars->fdtype;
1647 break;
1648 default:
1649 return (ENOENT);
1650 }
1651 return (0);
1652 }
1653
1654 int
1655 fdc_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
1656 {
1657 struct fdc_ivars *ivars = device_get_ivars(child);
1658
1659 switch (which) {
1660 case FDC_IVAR_FDUNIT:
1661 ivars->fdunit = value;
1662 break;
1663 case FDC_IVAR_FDTYPE:
1664 ivars->fdtype = value;
1665 break;
1666 default:
1667 return (ENOENT);
1668 }
1669 return (0);
1670 }
1671
1672 int
1673 fdc_initial_reset(device_t dev, struct fdc_data *fdc)
1674 {
1675 int ic_type, part_id;
1676
1677 /*
1678 * A status value of 0xff is very unlikely, but not theoretically
1679 * impossible, but it is far more likely to indicate an empty bus.
1680 */
1681 if (fdsts_rd(fdc) == 0xff)
1682 return (ENXIO);
1683
1684 /*
1685 * Assert a reset to the floppy controller and check that the status
1686 * register goes to zero.
1687 */
1688 fdout_wr(fdc, 0);
1689 fdout_wr(fdc, 0);
1690 if (fdsts_rd(fdc) != 0)
1691 return (ENXIO);
1692
1693 /*
1694 * Clear the reset and see it come ready.
1695 */
1696 fdout_wr(fdc, FDO_FRST);
1697 DELAY(100);
1698 if (fdsts_rd(fdc) != 0x80)
1699 return (ENXIO);
1700
1701 /* Then, see if it can handle a command. */
1702 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(6, 240),
1703 NE7_SPEC_2(31, 0), 0))
1704 return (ENXIO);
1705
1706 /*
1707 * Try to identify the chip.
1708 *
1709 * The i8272 datasheet documents that unknown commands
1710 * will return ST0 as 0x80. The i8272 is supposedly identical
1711 * to the NEC765.
1712 * The i82077SL datasheet says 0x90 for the VERSION command,
1713 * and several "superio" chips emulate this.
1714 */
1715 if (fdc_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type))
1716 return (ENXIO);
1717 if (fdc_cmd(fdc, 1, 0x18, 1, &part_id))
1718 return (ENXIO);
1719 if (bootverbose)
1720 device_printf(dev,
1721 "ic_type %02x part_id %02x\n", ic_type, part_id);
1722 switch (ic_type & 0xff) {
1723 case 0x80:
1724 device_set_desc(dev, "NEC 765 or clone");
1725 fdc->fdct = FDC_NE765;
1726 break;
1727 case 0x81:
1728 case 0x90:
1729 device_set_desc(dev,
1730 "Enhanced floppy controller");
1731 fdc->fdct = FDC_ENHANCED;
1732 break;
1733 default:
1734 device_set_desc(dev, "Generic floppy controller");
1735 fdc->fdct = FDC_UNKNOWN;
1736 break;
1737 }
1738 return (0);
1739 }
1740
1741 int
1742 fdc_detach(device_t dev)
1743 {
1744 struct fdc_data *fdc;
1745 int error;
1746
1747 fdc = device_get_softc(dev);
1748
1749 /* have our children detached first */
1750 if ((error = bus_generic_detach(dev)))
1751 return (error);
1752
1753 if (fdc->fdc_intr)
1754 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1755 fdc->fdc_intr = NULL;
1756
1757 /* kill worker thread */
1758 mtx_lock(&fdc->fdc_mtx);
1759 fdc->flags |= FDC_KTHREAD_EXIT;
1760 wakeup(&fdc->head);
1761 while ((fdc->flags & FDC_KTHREAD_ALIVE) != 0)
1762 msleep(fdc->fdc_thread, &fdc->fdc_mtx, PRIBIO, "fdcdet", 0);
1763 mtx_unlock(&fdc->fdc_mtx);
1764
1765 /* reset controller, turn motor off */
1766 fdout_wr(fdc, 0);
1767
1768 if (!(fdc->flags & FDC_NODMA))
1769 isa_dma_release(fdc->dmachan);
1770 fdc_release_resources(fdc);
1771 mtx_destroy(&fdc->fdc_mtx);
1772 return (0);
1773 }
1774
1775 /*
1776 * Add a child device to the fdc controller. It will then be probed etc.
1777 */
1778 device_t
1779 fdc_add_child(device_t dev, const char *name, int unit)
1780 {
1781 struct fdc_ivars *ivar;
1782 device_t child;
1783
1784 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO);
1785 if (ivar == NULL)
1786 return (NULL);
1787 child = device_add_child(dev, name, unit);
1788 if (child == NULL) {
1789 free(ivar, M_DEVBUF);
1790 return (NULL);
1791 }
1792 device_set_ivars(child, ivar);
1793 ivar->fdunit = unit;
1794 ivar->fdtype = FDT_NONE;
1795 if (resource_disabled(name, unit))
1796 device_disable(child);
1797 return (child);
1798 }
1799
1800 int
1801 fdc_attach(device_t dev)
1802 {
1803 struct fdc_data *fdc;
1804 int error;
1805
1806 fdc = device_get_softc(dev);
1807 fdc->fdc_dev = dev;
1808 error = fdc_initial_reset(dev, fdc);
1809 if (error) {
1810 device_printf(dev, "does not respond\n");
1811 return (error);
1812 }
1813 error = bus_setup_intr(dev, fdc->res_irq,
1814 INTR_TYPE_BIO | INTR_ENTROPY |
1815 ((fdc->flags & FDC_NOFAST) ? INTR_MPSAFE : 0),
1816 ((fdc->flags & FDC_NOFAST) ? NULL : fdc_intr_fast),
1817 ((fdc->flags & FDC_NOFAST) ? fdc_intr : NULL),
1818 fdc, &fdc->fdc_intr);
1819 if (error) {
1820 device_printf(dev, "cannot setup interrupt\n");
1821 return (error);
1822 }
1823 if (!(fdc->flags & FDC_NODMA)) {
1824 error = isa_dma_acquire(fdc->dmachan);
1825 if (!error) {
1826 error = isa_dma_init(fdc->dmachan,
1827 MAX_BYTES_PER_CYL, M_WAITOK);
1828 if (error)
1829 isa_dma_release(fdc->dmachan);
1830 }
1831 if (error)
1832 return (error);
1833 }
1834 fdc->fdcu = device_get_unit(dev);
1835 fdc->flags |= FDC_NEEDS_RESET;
1836
1837 mtx_init(&fdc->fdc_mtx, "fdc lock", NULL, MTX_DEF);
1838
1839 /* reset controller, turn motor off, clear fdout mirror reg */
1840 fdout_wr(fdc, fdc->fdout = 0);
1841 bioq_init(&fdc->head);
1842
1843 settle = hz / 8;
1844
1845 return (0);
1846 }
1847
1848 void
1849 fdc_start_worker(device_t dev)
1850 {
1851 struct fdc_data *fdc;
1852
1853 fdc = device_get_softc(dev);
1854 kproc_create(fdc_thread, fdc, &fdc->fdc_thread, 0, 0,
1855 "fdc%d", device_get_unit(dev));
1856 }
1857
1858 int
1859 fdc_hints_probe(device_t dev)
1860 {
1861 const char *name, *dname;
1862 int i, error, dunit;
1863
1864 /*
1865 * Probe and attach any children. We should probably detect
1866 * devices from the BIOS unless overridden.
1867 */
1868 name = device_get_nameunit(dev);
1869 i = 0;
1870 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) {
1871 resource_int_value(dname, dunit, "drive", &dunit);
1872 fdc_add_child(dev, dname, dunit);
1873 }
1874
1875 if ((error = bus_generic_attach(dev)) != 0)
1876 return (error);
1877 return (0);
1878 }
1879
1880 int
1881 fdc_print_child(device_t me, device_t child)
1882 {
1883 int retval = 0, flags;
1884
1885 retval += bus_print_child_header(me, child);
1886 retval += printf(" on %s drive %d", device_get_nameunit(me),
1887 fdc_get_fdunit(child));
1888 if ((flags = device_get_flags(me)) != 0)
1889 retval += printf(" flags %#x", flags);
1890 retval += printf("\n");
1891
1892 return (retval);
1893 }
1894
1895 /*
1896 * Configuration/initialization, per drive.
1897 */
1898 static int
1899 fd_probe(device_t dev)
1900 {
1901 int unit;
1902 int i;
1903 u_int st0, st3;
1904 struct fd_data *fd;
1905 struct fdc_data *fdc;
1906 int fdsu;
1907 int flags, type;
1908
1909 fdsu = fdc_get_fdunit(dev);
1910 fd = device_get_softc(dev);
1911 fdc = device_get_softc(device_get_parent(dev));
1912 flags = device_get_flags(dev);
1913
1914 fd->dev = dev;
1915 fd->fdc = fdc;
1916 fd->fdsu = fdsu;
1917 unit = device_get_unit(dev);
1918
1919 /* Auto-probe if fdinfo is present, but always allow override. */
1920 type = flags & FD_TYPEMASK;
1921 if (type == FDT_NONE && (type = fdc_get_fdtype(dev)) != FDT_NONE) {
1922 fd->type = type;
1923 goto done;
1924 } else {
1925 /* make sure fdautoselect() will be called */
1926 fd->flags = FD_EMPTY;
1927 fd->type = type;
1928 }
1929
1930 #if defined(__i386__) || defined(__amd64__)
1931 if (fd->type == FDT_NONE && (unit == 0 || unit == 1)) {
1932 /* Look up what the BIOS thinks we have. */
1933 if (unit == 0)
1934 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4;
1935 else
1936 fd->type = rtcin(RTC_FDISKETTE) & 0x0f;
1937 if (fd->type == FDT_288M_1)
1938 fd->type = FDT_288M;
1939 }
1940 #endif /* __i386__ || __amd64__ */
1941 /* is there a unit? */
1942 if (fd->type == FDT_NONE)
1943 return (ENXIO);
1944
1945 mtx_lock(&fdc->fdc_mtx);
1946
1947 /* select it */
1948 fd_select(fd);
1949 fd_motor(fd, 1);
1950 fdc->fd = fd;
1951 fdc_reset(fdc); /* XXX reset, then unreset, etc. */
1952 DELAY(1000000); /* 1 sec */
1953
1954 if ((flags & FD_NO_PROBE) == 0) {
1955 /* If we're at track 0 first seek inwards. */
1956 if ((fdc_sense_drive(fdc, &st3) == 0) &&
1957 (st3 & NE7_ST3_T0)) {
1958 /* Seek some steps... */
1959 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
1960 /* ...wait a moment... */
1961 DELAY(300000);
1962 /* make ctrlr happy: */
1963 fdc_sense_int(fdc, NULL, NULL);
1964 }
1965 }
1966
1967 for (i = 0; i < 2; i++) {
1968 /*
1969 * we must recalibrate twice, just in case the
1970 * heads have been beyond cylinder 76, since
1971 * most FDCs still barf when attempting to
1972 * recalibrate more than 77 steps
1973 */
1974 /* go back to 0: */
1975 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
1976 /* a second being enough for full stroke seek*/
1977 DELAY(i == 0 ? 1000000 : 300000);
1978
1979 /* anything responding? */
1980 if (fdc_sense_int(fdc, &st0, NULL) == 0 &&
1981 (st0 & NE7_ST0_EC) == 0)
1982 break; /* already probed successfully */
1983 }
1984 }
1985 }
1986
1987 fd_motor(fd, 0);
1988 fdc->fd = NULL;
1989 mtx_unlock(&fdc->fdc_mtx);
1990
1991 if ((flags & FD_NO_PROBE) == 0 &&
1992 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */
1993 return (ENXIO);
1994
1995 done:
1996
1997 switch (fd->type) {
1998 case FDT_12M:
1999 device_set_desc(dev, "1200-KB 5.25\" drive");
2000 break;
2001 case FDT_144M:
2002 device_set_desc(dev, "1440-KB 3.5\" drive");
2003 break;
2004 case FDT_288M:
2005 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
2006 break;
2007 case FDT_360K:
2008 device_set_desc(dev, "360-KB 5.25\" drive");
2009 break;
2010 case FDT_720K:
2011 device_set_desc(dev, "720-KB 3.5\" drive");
2012 break;
2013 default:
2014 return (ENXIO);
2015 }
2016 fd->track = FD_NO_TRACK;
2017 fd->fdc = fdc;
2018 fd->fdsu = fdsu;
2019 fd->options = 0;
2020 callout_init_mtx(&fd->toffhandle, &fd->fdc->fdc_mtx, 0);
2021
2022 /* initialize densities for subdevices */
2023 fdsettype(fd, fd_native_types[fd->type]);
2024 return (0);
2025 }
2026
2027 /*
2028 * We have to do this in a geom event because GEOM is not running
2029 * when fd_attach() is.
2030 * XXX: move fd_attach after geom like ata/scsi disks
2031 */
2032 static void
2033 fd_attach2(void *arg, int flag)
2034 {
2035 struct fd_data *fd;
2036
2037 fd = arg;
2038
2039 fd->fd_geom = g_new_geomf(&g_fd_class,
2040 "fd%d", device_get_unit(fd->dev));
2041 fd->fd_provider = g_new_providerf(fd->fd_geom, "%s", fd->fd_geom->name);
2042 fd->fd_geom->softc = fd;
2043 g_error_provider(fd->fd_provider, 0);
2044 }
2045
2046 static int
2047 fd_attach(device_t dev)
2048 {
2049 struct fd_data *fd;
2050
2051 fd = device_get_softc(dev);
2052 g_post_event(fd_attach2, fd, M_WAITOK, NULL);
2053 fd->flags |= FD_EMPTY;
2054 bioq_init(&fd->fd_bq);
2055
2056 return (0);
2057 }
2058
2059 static void
2060 fd_detach_geom(void *arg, int flag)
2061 {
2062 struct fd_data *fd = arg;
2063
2064 g_topology_assert();
2065 g_wither_geom(fd->fd_geom, ENXIO);
2066 }
2067
2068 static int
2069 fd_detach(device_t dev)
2070 {
2071 struct fd_data *fd;
2072
2073 fd = device_get_softc(dev);
2074 g_waitfor_event(fd_detach_geom, fd, M_WAITOK, NULL);
2075 while (device_get_state(dev) == DS_BUSY)
2076 tsleep(fd, PZERO, "fdd", hz/10);
2077 callout_drain(&fd->toffhandle);
2078
2079 return (0);
2080 }
2081
2082 static device_method_t fd_methods[] = {
2083 /* Device interface */
2084 DEVMETHOD(device_probe, fd_probe),
2085 DEVMETHOD(device_attach, fd_attach),
2086 DEVMETHOD(device_detach, fd_detach),
2087 DEVMETHOD(device_shutdown, bus_generic_shutdown),
2088 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
2089 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
2090 { 0, 0 }
2091 };
2092
2093 static driver_t fd_driver = {
2094 "fd",
2095 fd_methods,
2096 sizeof(struct fd_data)
2097 };
2098
2099 static int
2100 fdc_modevent(module_t mod, int type, void *data)
2101 {
2102
2103 return (g_modevent(NULL, type, &g_fd_class));
2104 }
2105
2106 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, fdc_modevent, 0);
Cache object: 1251726cdbc0417242c0ee23d82eab9b
|