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/9.0/sys/dev/fdc/fdc.c 218909 2011-02-21 09:01:34Z brucec $");
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/priv.h>
73 #include <sys/proc.h>
74 #include <sys/rman.h>
75 #include <sys/sysctl.h>
76 #include <sys/systm.h>
77
78 #include <geom/geom.h>
79
80 #include <machine/bus.h>
81 #include <machine/clock.h>
82 #include <machine/stdarg.h>
83
84 #include <isa/isavar.h>
85 #include <isa/isareg.h>
86 #include <dev/fdc/fdcvar.h>
87 #include <isa/rtc.h>
88
89 #include <dev/ic/nec765.h>
90
91 /*
92 * Runtime configuration hints/flags
93 */
94
95 /* configuration flags for fd */
96 #define FD_TYPEMASK 0x0f /* drive type, matches enum
97 * fd_drivetype; on i386 machines, if
98 * given as 0, use RTC type for fd0
99 * and fd1 */
100 #define FD_NO_CHLINE 0x10 /* drive does not support changeline
101 * aka. unit attention */
102 #define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just
103 * assume it is there */
104
105 /*
106 * Things that could conceiveably considered parameters or tweakables
107 */
108
109 /*
110 * Maximal number of bytes in a cylinder.
111 * This is used for ISADMA bouncebuffer allocation and sets the max
112 * xfersize we support.
113 *
114 * 2.88M format has 2 x 36 x 512, allow for hacked up density.
115 */
116 #define MAX_BYTES_PER_CYL (2 * 40 * 512)
117
118 /*
119 * Timeout value for the PIO loops to wait until the FDC main status
120 * register matches our expectations (request for master, direction
121 * bit). This is supposed to be a number of microseconds, although
122 * timing might actually not be very accurate.
123 *
124 * Timeouts of 100 msec are believed to be required for some broken
125 * (old) hardware.
126 */
127 #define FDSTS_TIMEOUT 100000
128
129 /*
130 * After this many errors, stop whining. Close will reset this count.
131 */
132 #define FDC_ERRMAX 100
133
134 /*
135 * AutoDensity search lists for each drive type.
136 */
137
138 static struct fd_type fd_searchlist_360k[] = {
139 { FDF_5_360 },
140 { 0 }
141 };
142
143 static struct fd_type fd_searchlist_12m[] = {
144 { FDF_5_1200 | FL_AUTO },
145 { FDF_5_360 | FL_2STEP | FL_AUTO},
146 { 0 }
147 };
148
149 static struct fd_type fd_searchlist_720k[] = {
150 { FDF_3_720 },
151 { 0 }
152 };
153
154 static struct fd_type fd_searchlist_144m[] = {
155 { FDF_3_1440 | FL_AUTO},
156 { FDF_3_720 | FL_AUTO},
157 { 0 }
158 };
159
160 static struct fd_type fd_searchlist_288m[] = {
161 { FDF_3_1440 | FL_AUTO },
162 #if 0
163 { FDF_3_2880 | FL_AUTO }, /* XXX: probably doesn't work */
164 #endif
165 { FDF_3_720 | FL_AUTO},
166 { 0 }
167 };
168
169 /*
170 * Order must match enum fd_drivetype in <sys/fdcio.h>.
171 */
172 static struct fd_type *fd_native_types[] = {
173 NULL, /* FDT_NONE */
174 fd_searchlist_360k, /* FDT_360K */
175 fd_searchlist_12m, /* FDT_12M */
176 fd_searchlist_720k, /* FDT_720K */
177 fd_searchlist_144m, /* FDT_144M */
178 fd_searchlist_288m, /* FDT_288M_1 (mapped to FDT_288M) */
179 fd_searchlist_288m, /* FDT_288M */
180 };
181
182 /*
183 * Internals start here
184 */
185
186 /* registers */
187 #define FDOUT 2 /* Digital Output Register (W) */
188 #define FDO_FDSEL 0x03 /* floppy device select */
189 #define FDO_FRST 0x04 /* floppy controller reset */
190 #define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */
191 #define FDO_MOEN0 0x10 /* motor enable drive 0 */
192 #define FDO_MOEN1 0x20 /* motor enable drive 1 */
193 #define FDO_MOEN2 0x40 /* motor enable drive 2 */
194 #define FDO_MOEN3 0x80 /* motor enable drive 3 */
195
196 #define FDSTS 4 /* NEC 765 Main Status Register (R) */
197 #define FDDSR 4 /* Data Rate Select Register (W) */
198 #define FDDATA 5 /* NEC 765 Data Register (R/W) */
199 #define FDCTL 7 /* Control Register (W) */
200
201 /*
202 * The YE-DATA PC Card floppies use PIO to read in the data rather
203 * than DMA due to the wild variability of DMA for the PC Card
204 * devices. DMA was deleted from the PC Card specification in version
205 * 7.2 of the standard, but that post-dates the YE-DATA devices by many
206 * years.
207 *
208 * In addition, if we cannot setup the DMA resources for the ISA
209 * attachment, we'll use this same offset for data transfer. However,
210 * that almost certainly won't work.
211 *
212 * For this mode, offset 0 and 1 must be used to setup the transfer
213 * for this floppy. This is OK for PC Card YE Data devices, but for
214 * ISA this is likely wrong. These registers are only available on
215 * those systems that map them to the floppy drive. Newer systems do
216 * not do this, and we should likely prohibit access to them (or
217 * disallow NODMA to be set).
218 */
219 #define FDBCDR 0 /* And 1 */
220 #define FD_YE_DATAPORT 6 /* Drive Data port */
221
222 #define FDI_DCHG 0x80 /* diskette has been changed */
223 /* requires drive and motor being selected */
224 /* is cleared by any step pulse to drive */
225
226 /*
227 * We have three private BIO commands.
228 */
229 #define BIO_PROBE BIO_CMD0
230 #define BIO_RDID BIO_CMD1
231 #define BIO_FMT BIO_CMD2
232
233 /*
234 * Per drive structure (softc).
235 */
236 struct fd_data {
237 u_char *fd_ioptr; /* IO pointer */
238 u_int fd_iosize; /* Size of IO chunks */
239 u_int fd_iocount; /* Outstanding requests */
240 struct fdc_data *fdc; /* pointer to controller structure */
241 int fdsu; /* this units number on this controller */
242 enum fd_drivetype type; /* drive type */
243 struct fd_type *ft; /* pointer to current type descriptor */
244 struct fd_type fts; /* type descriptors */
245 int sectorsize;
246 int flags;
247 #define FD_WP (1<<0) /* Write protected */
248 #define FD_MOTOR (1<<1) /* motor should be on */
249 #define FD_MOTORWAIT (1<<2) /* motor should be on */
250 #define FD_EMPTY (1<<3) /* no media */
251 #define FD_NEWDISK (1<<4) /* media changed */
252 #define FD_ISADMA (1<<5) /* isa dma started */
253 int track; /* where we think the head is */
254 #define FD_NO_TRACK -2
255 int options; /* FDOPT_* */
256 struct callout toffhandle;
257 struct g_geom *fd_geom;
258 struct g_provider *fd_provider;
259 device_t dev;
260 struct bio_queue_head fd_bq;
261 };
262
263 #define FD_NOT_VALID -2
264
265 static driver_intr_t fdc_intr;
266 static driver_filter_t fdc_intr_fast;
267 static void fdc_reset(struct fdc_data *);
268 static int fd_probe_disk(struct fd_data *, int *);
269
270 SYSCTL_NODE(_debug, OID_AUTO, fdc, CTLFLAG_RW, 0, "fdc driver");
271
272 static int fifo_threshold = 8;
273 SYSCTL_INT(_debug_fdc, OID_AUTO, fifo, CTLFLAG_RW, &fifo_threshold, 0,
274 "FIFO threshold setting");
275
276 static int debugflags = 0;
277 SYSCTL_INT(_debug_fdc, OID_AUTO, debugflags, CTLFLAG_RW, &debugflags, 0,
278 "Debug flags");
279
280 static int retries = 10;
281 SYSCTL_INT(_debug_fdc, OID_AUTO, retries, CTLFLAG_RW, &retries, 0,
282 "Number of retries to attempt");
283
284 static int spec1 = 0xaf;
285 SYSCTL_INT(_debug_fdc, OID_AUTO, spec1, CTLFLAG_RW, &spec1, 0,
286 "Specification byte one (step-rate + head unload)");
287
288 static int spec2 = 0x10;
289 SYSCTL_INT(_debug_fdc, OID_AUTO, spec2, CTLFLAG_RW, &spec2, 0,
290 "Specification byte two (head load time + no-dma)");
291
292 static int settle;
293 SYSCTL_INT(_debug_fdc, OID_AUTO, settle, CTLFLAG_RW, &settle, 0,
294 "Head settling time in sec/hz");
295
296 static void
297 fdprinttype(struct fd_type *ft)
298 {
299
300 printf("(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,0x%x)",
301 ft->sectrac, ft->secsize, ft->datalen, ft->gap, ft->tracks,
302 ft->size, ft->trans, ft->heads, ft->f_gap, ft->f_inter,
303 ft->offset_side2, ft->flags);
304 }
305
306 static void
307 fdsettype(struct fd_data *fd, struct fd_type *ft)
308 {
309 fd->ft = ft;
310 ft->size = ft->sectrac * ft->heads * ft->tracks;
311 fd->sectorsize = 128 << fd->ft->secsize;
312 }
313
314 /*
315 * Bus space handling (access to low-level IO).
316 */
317 __inline static void
318 fdregwr(struct fdc_data *fdc, int reg, uint8_t v)
319 {
320
321 bus_space_write_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg], v);
322 }
323
324 __inline static uint8_t
325 fdregrd(struct fdc_data *fdc, int reg)
326 {
327
328 return bus_space_read_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg]);
329 }
330
331 static void
332 fdctl_wr(struct fdc_data *fdc, u_int8_t v)
333 {
334
335 fdregwr(fdc, FDCTL, v);
336 }
337
338 static void
339 fdout_wr(struct fdc_data *fdc, u_int8_t v)
340 {
341
342 fdregwr(fdc, FDOUT, v);
343 }
344
345 static u_int8_t
346 fdsts_rd(struct fdc_data *fdc)
347 {
348
349 return fdregrd(fdc, FDSTS);
350 }
351
352 static void
353 fddsr_wr(struct fdc_data *fdc, u_int8_t v)
354 {
355
356 fdregwr(fdc, FDDSR, v);
357 }
358
359 static void
360 fddata_wr(struct fdc_data *fdc, u_int8_t v)
361 {
362
363 fdregwr(fdc, FDDATA, v);
364 }
365
366 static u_int8_t
367 fddata_rd(struct fdc_data *fdc)
368 {
369
370 return fdregrd(fdc, FDDATA);
371 }
372
373 static u_int8_t
374 fdin_rd(struct fdc_data *fdc)
375 {
376
377 return fdregrd(fdc, FDCTL);
378 }
379
380 /*
381 * Magic pseudo-DMA initialization for YE FDC. Sets count and
382 * direction.
383 */
384 static void
385 fdbcdr_wr(struct fdc_data *fdc, int iswrite, uint16_t count)
386 {
387 fdregwr(fdc, FDBCDR, (count - 1) & 0xff);
388 fdregwr(fdc, FDBCDR + 1,
389 (iswrite ? 0x80 : 0) | (((count - 1) >> 8) & 0x7f));
390 }
391
392 static int
393 fdc_err(struct fdc_data *fdc, const char *s)
394 {
395 fdc->fdc_errs++;
396 if (s) {
397 if (fdc->fdc_errs < FDC_ERRMAX)
398 device_printf(fdc->fdc_dev, "%s", s);
399 else if (fdc->fdc_errs == FDC_ERRMAX)
400 device_printf(fdc->fdc_dev, "too many errors, not "
401 "logging any more\n");
402 }
403
404 return (1);
405 }
406
407 /*
408 * FDC IO functions, take care of the main status register, timeout
409 * in case the desired status bits are never set.
410 *
411 * These PIO loops initially start out with short delays between
412 * each iteration in the expectation that the required condition
413 * is usually met quickly, so it can be handled immediately.
414 */
415 static int
416 fdc_in(struct fdc_data *fdc, int *ptr)
417 {
418 int i, j, step;
419
420 step = 1;
421 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
422 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
423 if (i == (NE7_DIO|NE7_RQM)) {
424 i = fddata_rd(fdc);
425 if (ptr)
426 *ptr = i;
427 return (0);
428 }
429 if (i == NE7_RQM)
430 return (fdc_err(fdc, "ready for output in input\n"));
431 step += step;
432 DELAY(step);
433 }
434 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
435 }
436
437 static int
438 fdc_out(struct fdc_data *fdc, int x)
439 {
440 int i, j, step;
441
442 step = 1;
443 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
444 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
445 if (i == NE7_RQM) {
446 fddata_wr(fdc, x);
447 return (0);
448 }
449 if (i == (NE7_DIO|NE7_RQM))
450 return (fdc_err(fdc, "ready for input in output\n"));
451 step += step;
452 DELAY(step);
453 }
454 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
455 }
456
457 /*
458 * fdc_cmd: Send a command to the chip.
459 * Takes a varargs with this structure:
460 * # of output bytes
461 * output bytes as int [...]
462 * # of input bytes
463 * input bytes as int* [...]
464 */
465 static int
466 fdc_cmd(struct fdc_data *fdc, int n_out, ...)
467 {
468 u_char cmd = 0;
469 int n_in;
470 int n, i;
471 va_list ap;
472
473 va_start(ap, n_out);
474 for (n = 0; n < n_out; n++) {
475 i = va_arg(ap, int);
476 if (n == 0)
477 cmd = i;
478 if (fdc_out(fdc, i) < 0) {
479 char msg[50];
480 snprintf(msg, sizeof(msg),
481 "cmd %x failed at out byte %d of %d\n",
482 cmd, n + 1, n_out);
483 fdc->flags |= FDC_NEEDS_RESET;
484 va_end(ap);
485 return fdc_err(fdc, msg);
486 }
487 }
488 n_in = va_arg(ap, int);
489 for (n = 0; n < n_in; n++) {
490 int *ptr = va_arg(ap, int *);
491 if (fdc_in(fdc, ptr) < 0) {
492 char msg[50];
493 snprintf(msg, sizeof(msg),
494 "cmd %02x failed at in byte %d of %d\n",
495 cmd, n + 1, n_in);
496 fdc->flags |= FDC_NEEDS_RESET;
497 va_end(ap);
498 return fdc_err(fdc, msg);
499 }
500 }
501 va_end(ap);
502 return (0);
503 }
504
505 static void
506 fdc_reset(struct fdc_data *fdc)
507 {
508 int i, r[10];
509
510 if (fdc->fdct == FDC_ENHANCED) {
511 /* Try a software reset, default precomp, and 500 kb/s */
512 fddsr_wr(fdc, I8207X_DSR_SR);
513 } else {
514 /* Try a hardware reset, keep motor on */
515 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
516 DELAY(100);
517 /* enable FDC, but defer interrupts a moment */
518 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
519 }
520 DELAY(100);
521 fdout_wr(fdc, fdc->fdout);
522
523 /* XXX after a reset, silently believe the FDC will accept commands */
524 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, spec1, spec2, 0))
525 device_printf(fdc->fdc_dev, " SPECIFY failed in reset\n");
526
527 if (fdc->fdct == FDC_ENHANCED) {
528 if (fdc_cmd(fdc, 4,
529 I8207X_CONFIG,
530 0,
531 0x40 | /* Enable Implied Seek */
532 0x10 | /* Polling disabled */
533 (fifo_threshold - 1), /* Fifo threshold */
534 0x00, /* Precomp track */
535 0))
536 device_printf(fdc->fdc_dev,
537 " CONFIGURE failed in reset\n");
538 if (debugflags & 1) {
539 if (fdc_cmd(fdc, 1,
540 I8207X_DUMPREG,
541 10, &r[0], &r[1], &r[2], &r[3], &r[4],
542 &r[5], &r[6], &r[7], &r[8], &r[9]))
543 device_printf(fdc->fdc_dev,
544 " DUMPREG failed in reset\n");
545 for (i = 0; i < 10; i++)
546 printf(" %02x", r[i]);
547 printf("\n");
548 }
549 }
550 }
551
552 static int
553 fdc_sense_drive(struct fdc_data *fdc, int *st3p)
554 {
555 int st3;
556
557 if (fdc_cmd(fdc, 2, NE7CMD_SENSED, fdc->fd->fdsu, 1, &st3))
558 return (fdc_err(fdc, "Sense Drive Status failed\n"));
559 if (st3p)
560 *st3p = st3;
561 return (0);
562 }
563
564 static int
565 fdc_sense_int(struct fdc_data *fdc, int *st0p, int *cylp)
566 {
567 int cyl, st0, ret;
568
569 ret = fdc_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
570 if (ret) {
571 (void)fdc_err(fdc, "sense intr err reading stat reg 0\n");
572 return (ret);
573 }
574
575 if (st0p)
576 *st0p = st0;
577
578 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
579 /*
580 * There doesn't seem to have been an interrupt.
581 */
582 return (FD_NOT_VALID);
583 }
584
585 if (fdc_in(fdc, &cyl) < 0)
586 return fdc_err(fdc, "can't get cyl num\n");
587
588 if (cylp)
589 *cylp = cyl;
590
591 return (0);
592 }
593
594 static int
595 fdc_read_status(struct fdc_data *fdc)
596 {
597 int i, ret, status;
598
599 for (i = ret = 0; i < 7; i++) {
600 ret = fdc_in(fdc, &status);
601 fdc->status[i] = status;
602 if (ret != 0)
603 break;
604 }
605
606 if (ret == 0)
607 fdc->flags |= FDC_STAT_VALID;
608 else
609 fdc->flags &= ~FDC_STAT_VALID;
610
611 return ret;
612 }
613
614 /*
615 * Select this drive
616 */
617 static void
618 fd_select(struct fd_data *fd)
619 {
620 struct fdc_data *fdc;
621
622 /* XXX: lock controller */
623 fdc = fd->fdc;
624 fdc->fdout &= ~FDO_FDSEL;
625 fdc->fdout |= FDO_FDMAEN | FDO_FRST | fd->fdsu;
626 fdout_wr(fdc, fdc->fdout);
627 }
628
629 static void
630 fd_turnon(void *arg)
631 {
632 struct fd_data *fd;
633 struct bio *bp;
634 int once;
635
636 fd = arg;
637 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
638 fd->flags &= ~FD_MOTORWAIT;
639 fd->flags |= FD_MOTOR;
640 once = 0;
641 for (;;) {
642 bp = bioq_takefirst(&fd->fd_bq);
643 if (bp == NULL)
644 break;
645 bioq_disksort(&fd->fdc->head, bp);
646 once = 1;
647 }
648 if (once)
649 wakeup(&fd->fdc->head);
650 }
651
652 static void
653 fd_motor(struct fd_data *fd, int turnon)
654 {
655 struct fdc_data *fdc;
656
657 fdc = fd->fdc;
658 /*
659 mtx_assert(&fdc->fdc_mtx, MA_OWNED);
660 */
661 if (turnon) {
662 fd->flags |= FD_MOTORWAIT;
663 fdc->fdout |= (FDO_MOEN0 << fd->fdsu);
664 callout_reset(&fd->toffhandle, hz, fd_turnon, fd);
665 } else {
666 callout_stop(&fd->toffhandle);
667 fd->flags &= ~(FD_MOTOR|FD_MOTORWAIT);
668 fdc->fdout &= ~(FDO_MOEN0 << fd->fdsu);
669 }
670 fdout_wr(fdc, fdc->fdout);
671 }
672
673 static void
674 fd_turnoff(void *xfd)
675 {
676 struct fd_data *fd = xfd;
677
678 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
679 fd_motor(fd, 0);
680 }
681
682 /*
683 * fdc_intr - wake up the worker thread.
684 */
685
686 static void
687 fdc_intr(void *arg)
688 {
689
690 wakeup(arg);
691 }
692
693 static int
694 fdc_intr_fast(void *arg)
695 {
696
697 wakeup(arg);
698 return(FILTER_HANDLED);
699 }
700
701 /*
702 * fdc_pio(): perform programmed IO read/write for YE PCMCIA floppy.
703 */
704 static void
705 fdc_pio(struct fdc_data *fdc)
706 {
707 u_char *cptr;
708 struct bio *bp;
709 u_int count;
710
711 bp = fdc->bp;
712 cptr = fdc->fd->fd_ioptr;
713 count = fdc->fd->fd_iosize;
714
715 if (bp->bio_cmd == BIO_READ) {
716 fdbcdr_wr(fdc, 0, count);
717 bus_space_read_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
718 fdc->ioff[FD_YE_DATAPORT], cptr, count);
719 } else {
720 bus_space_write_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
721 fdc->ioff[FD_YE_DATAPORT], cptr, count);
722 fdbcdr_wr(fdc, 0, count); /* needed? */
723 }
724 }
725
726 static int
727 fdc_biodone(struct fdc_data *fdc, int error)
728 {
729 struct fd_data *fd;
730 struct bio *bp;
731
732 fd = fdc->fd;
733 bp = fdc->bp;
734
735 mtx_lock(&fdc->fdc_mtx);
736 if (--fd->fd_iocount == 0)
737 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
738 fdc->bp = NULL;
739 fdc->fd = NULL;
740 mtx_unlock(&fdc->fdc_mtx);
741 if (bp->bio_to != NULL) {
742 if ((debugflags & 2) && fd->fdc->retry > 0)
743 printf("retries: %d\n", fd->fdc->retry);
744 g_io_deliver(bp, error);
745 return (0);
746 }
747 bp->bio_error = error;
748 bp->bio_flags |= BIO_DONE;
749 wakeup(bp);
750 return (0);
751 }
752
753 static int retry_line;
754
755 static int
756 fdc_worker(struct fdc_data *fdc)
757 {
758 struct fd_data *fd;
759 struct bio *bp;
760 int i, nsect;
761 int st0, st3, cyl, mfm, steptrac, cylinder, descyl, sec;
762 int head;
763 static int need_recal;
764 struct fdc_readid *idp;
765 struct fd_formb *finfo;
766
767 /* Have we exhausted our retries ? */
768 bp = fdc->bp;
769 fd = fdc->fd;
770 if (bp != NULL &&
771 (fdc->retry >= retries || (fd->options & FDOPT_NORETRY))) {
772 if ((debugflags & 4))
773 printf("Too many retries (EIO)\n");
774 if (fdc->flags & FDC_NEEDS_RESET) {
775 mtx_lock(&fdc->fdc_mtx);
776 fd->flags |= FD_EMPTY;
777 mtx_unlock(&fdc->fdc_mtx);
778 }
779 return (fdc_biodone(fdc, EIO));
780 }
781
782 /* Disable ISADMA if we bailed while it was active */
783 if (fd != NULL && (fd->flags & FD_ISADMA)) {
784 isa_dmadone(
785 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE,
786 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
787 mtx_lock(&fdc->fdc_mtx);
788 fd->flags &= ~FD_ISADMA;
789 mtx_unlock(&fdc->fdc_mtx);
790 }
791
792 /* Unwedge the controller ? */
793 if (fdc->flags & FDC_NEEDS_RESET) {
794 fdc->flags &= ~FDC_NEEDS_RESET;
795 fdc_reset(fdc);
796 tsleep(fdc, PRIBIO, "fdcrst", hz);
797 /* Discard results */
798 for (i = 0; i < 4; i++)
799 fdc_sense_int(fdc, &st0, &cyl);
800 /* All drives must recal */
801 need_recal = 0xf;
802 }
803
804 /* Pick up a request, if need be wait for it */
805 if (fdc->bp == NULL) {
806 mtx_lock(&fdc->fdc_mtx);
807 do {
808 fdc->bp = bioq_takefirst(&fdc->head);
809 if (fdc->bp == NULL)
810 msleep(&fdc->head, &fdc->fdc_mtx,
811 PRIBIO, "-", hz);
812 } while (fdc->bp == NULL &&
813 (fdc->flags & FDC_KTHREAD_EXIT) == 0);
814 mtx_unlock(&fdc->fdc_mtx);
815
816 if (fdc->bp == NULL)
817 /*
818 * Nothing to do, worker thread has been
819 * requested to stop.
820 */
821 return (0);
822
823 bp = fdc->bp;
824 fd = fdc->fd = bp->bio_driver1;
825 fdc->retry = 0;
826 fd->fd_ioptr = bp->bio_data;
827 if (bp->bio_cmd & BIO_FMT) {
828 i = offsetof(struct fd_formb, fd_formb_cylno(0));
829 fd->fd_ioptr += i;
830 fd->fd_iosize = bp->bio_length - i;
831 }
832 }
833
834 /* Select drive, setup params */
835 fd_select(fd);
836 if (fdc->fdct == FDC_ENHANCED)
837 fddsr_wr(fdc, fd->ft->trans);
838 else
839 fdctl_wr(fdc, fd->ft->trans);
840
841 if (bp->bio_cmd & BIO_PROBE) {
842 if ((!(device_get_flags(fd->dev) & FD_NO_CHLINE) &&
843 !(fdin_rd(fdc) & FDI_DCHG) &&
844 !(fd->flags & FD_EMPTY)) ||
845 fd_probe_disk(fd, &need_recal) == 0)
846 return (fdc_biodone(fdc, 0));
847 return (1);
848 }
849
850 /*
851 * If we are dead just flush the requests
852 */
853 if (fd->flags & FD_EMPTY)
854 return (fdc_biodone(fdc, ENXIO));
855
856 /* Check if we lost our media */
857 if (fdin_rd(fdc) & FDI_DCHG) {
858 if (debugflags & 0x40)
859 printf("Lost disk\n");
860 mtx_lock(&fdc->fdc_mtx);
861 fd->flags |= FD_EMPTY;
862 fd->flags |= FD_NEWDISK;
863 mtx_unlock(&fdc->fdc_mtx);
864 g_topology_lock();
865 g_orphan_provider(fd->fd_provider, ENXIO);
866 fd->fd_provider->flags |= G_PF_WITHER;
867 fd->fd_provider =
868 g_new_providerf(fd->fd_geom, fd->fd_geom->name);
869 g_error_provider(fd->fd_provider, 0);
870 g_topology_unlock();
871 return (fdc_biodone(fdc, ENXIO));
872 }
873
874 /* Check if the floppy is write-protected */
875 if(bp->bio_cmd & (BIO_FMT | BIO_WRITE)) {
876 retry_line = __LINE__;
877 if(fdc_sense_drive(fdc, &st3) != 0)
878 return (1);
879 if(st3 & NE7_ST3_WP)
880 return (fdc_biodone(fdc, EROFS));
881 }
882
883 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0;
884 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1;
885 i = fd->ft->sectrac * fd->ft->heads;
886 cylinder = bp->bio_pblkno / i;
887 descyl = cylinder * steptrac;
888 sec = bp->bio_pblkno % i;
889 nsect = i - sec;
890 head = sec / fd->ft->sectrac;
891 sec = sec % fd->ft->sectrac + 1;
892
893 /* If everything is going swimmingly, use multisector xfer */
894 if (fdc->retry == 0 && bp->bio_cmd & (BIO_READ|BIO_WRITE)) {
895 fd->fd_iosize = imin(nsect * fd->sectorsize, bp->bio_resid);
896 nsect = fd->fd_iosize / fd->sectorsize;
897 } else if (bp->bio_cmd & (BIO_READ|BIO_WRITE)) {
898 fd->fd_iosize = fd->sectorsize;
899 nsect = 1;
900 }
901
902 /* Do RECAL if we need to or are going to track zero anyway */
903 if ((need_recal & (1 << fd->fdsu)) ||
904 (cylinder == 0 && fd->track != 0) ||
905 fdc->retry > 2) {
906 retry_line = __LINE__;
907 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
908 return (1);
909 tsleep(fdc, PRIBIO, "fdrecal", hz);
910 retry_line = __LINE__;
911 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
912 return (1); /* XXX */
913 retry_line = __LINE__;
914 if ((st0 & 0xc0) || cyl != 0)
915 return (1);
916 need_recal &= ~(1 << fd->fdsu);
917 fd->track = 0;
918 /* let the heads settle */
919 if (settle)
920 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
921 }
922
923 /*
924 * SEEK to where we want to be
925 *
926 * Enhanced controllers do implied seeks for read&write as long as
927 * we do not need multiple steps per track.
928 */
929 if (cylinder != fd->track && (
930 fdc->fdct != FDC_ENHANCED ||
931 descyl != cylinder ||
932 (bp->bio_cmd & (BIO_RDID|BIO_FMT)))) {
933 retry_line = __LINE__;
934 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, descyl, 0))
935 return (1);
936 tsleep(fdc, PRIBIO, "fdseek", hz);
937 retry_line = __LINE__;
938 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
939 return (1); /* XXX */
940 retry_line = __LINE__;
941 if ((st0 & 0xc0) || cyl != descyl) {
942 need_recal |= (1 << fd->fdsu);
943 return (1);
944 }
945 /* let the heads settle */
946 if (settle)
947 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
948 }
949 fd->track = cylinder;
950
951 if (debugflags & 8)
952 printf("op %x bn %ju siz %u ptr %p retry %d\n",
953 bp->bio_cmd, bp->bio_pblkno, fd->fd_iosize,
954 fd->fd_ioptr, fdc->retry);
955
956 /* Setup ISADMA if we need it and have it */
957 if ((bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_FMT))
958 && !(fdc->flags & FDC_NODMA)) {
959 isa_dmastart(
960 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE,
961 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
962 mtx_lock(&fdc->fdc_mtx);
963 fd->flags |= FD_ISADMA;
964 mtx_unlock(&fdc->fdc_mtx);
965 }
966
967 /* Do PIO if we have to */
968 if (fdc->flags & FDC_NODMA) {
969 if (bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_FMT))
970 fdbcdr_wr(fdc, 1, fd->fd_iosize);
971 if (bp->bio_cmd & (BIO_WRITE|BIO_FMT))
972 fdc_pio(fdc);
973 }
974
975 switch(bp->bio_cmd) {
976 case BIO_FMT:
977 /* formatting */
978 finfo = (struct fd_formb *)bp->bio_data;
979 retry_line = __LINE__;
980 if (fdc_cmd(fdc, 6,
981 NE7CMD_FORMAT | mfm,
982 head << 2 | fd->fdsu,
983 finfo->fd_formb_secshift,
984 finfo->fd_formb_nsecs,
985 finfo->fd_formb_gaplen,
986 finfo->fd_formb_fillbyte, 0))
987 return (1);
988 break;
989 case BIO_RDID:
990 retry_line = __LINE__;
991 if (fdc_cmd(fdc, 2,
992 NE7CMD_READID | mfm,
993 head << 2 | fd->fdsu, 0))
994 return (1);
995 break;
996 case BIO_READ:
997 retry_line = __LINE__;
998 if (fdc_cmd(fdc, 9,
999 NE7CMD_READ | NE7CMD_SK | mfm | NE7CMD_MT,
1000 head << 2 | fd->fdsu, /* head & unit */
1001 fd->track, /* track */
1002 head, /* head */
1003 sec, /* sector + 1 */
1004 fd->ft->secsize, /* sector size */
1005 fd->ft->sectrac, /* sectors/track */
1006 fd->ft->gap, /* gap size */
1007 fd->ft->datalen, /* data length */
1008 0))
1009 return (1);
1010 break;
1011 case BIO_WRITE:
1012 retry_line = __LINE__;
1013 if (fdc_cmd(fdc, 9,
1014 NE7CMD_WRITE | mfm | NE7CMD_MT,
1015 head << 2 | fd->fdsu, /* head & unit */
1016 fd->track, /* track */
1017 head, /* head */
1018 sec, /* sector + 1 */
1019 fd->ft->secsize, /* sector size */
1020 fd->ft->sectrac, /* sectors/track */
1021 fd->ft->gap, /* gap size */
1022 fd->ft->datalen, /* data length */
1023 0))
1024 return (1);
1025 break;
1026 default:
1027 KASSERT(0 == 1, ("Wrong bio_cmd %x\n", bp->bio_cmd));
1028 }
1029
1030 /* Wait for interrupt */
1031 i = tsleep(fdc, PRIBIO, "fddata", hz);
1032
1033 /* PIO if the read looks good */
1034 if (i == 0 && (fdc->flags & FDC_NODMA) && (bp->bio_cmd & BIO_READ))
1035 fdc_pio(fdc);
1036
1037 /* Finish DMA */
1038 if (fd->flags & FD_ISADMA) {
1039 isa_dmadone(
1040 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE,
1041 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
1042 mtx_lock(&fdc->fdc_mtx);
1043 fd->flags &= ~FD_ISADMA;
1044 mtx_unlock(&fdc->fdc_mtx);
1045 }
1046
1047 if (i != 0) {
1048 /*
1049 * Timeout.
1050 *
1051 * Due to IBM's brain-dead design, the FDC has a faked ready
1052 * signal, hardwired to ready == true. Thus, any command
1053 * issued if there's no diskette in the drive will _never_
1054 * complete, and must be aborted by resetting the FDC.
1055 * Many thanks, Big Blue!
1056 */
1057 retry_line = __LINE__;
1058 fdc->flags |= FDC_NEEDS_RESET;
1059 return (1);
1060 }
1061
1062 retry_line = __LINE__;
1063 if (fdc_read_status(fdc))
1064 return (1);
1065
1066 if (debugflags & 0x10)
1067 printf(" -> %x %x %x %x\n",
1068 fdc->status[0], fdc->status[1],
1069 fdc->status[2], fdc->status[3]);
1070
1071 st0 = fdc->status[0] & NE7_ST0_IC;
1072 if (st0 != 0) {
1073 retry_line = __LINE__;
1074 if (st0 == NE7_ST0_IC_AT && fdc->status[1] & NE7_ST1_OR) {
1075 /*
1076 * DMA overrun. Someone hogged the bus and
1077 * didn't release it in time for the next
1078 * FDC transfer.
1079 */
1080 return (1);
1081 }
1082 retry_line = __LINE__;
1083 if(st0 == NE7_ST0_IC_IV) {
1084 fdc->flags |= FDC_NEEDS_RESET;
1085 return (1);
1086 }
1087 retry_line = __LINE__;
1088 if(st0 == NE7_ST0_IC_AT && fdc->status[2] & NE7_ST2_WC) {
1089 need_recal |= (1 << fd->fdsu);
1090 return (1);
1091 }
1092 if (debugflags & 0x20) {
1093 printf("status %02x %02x %02x %02x %02x %02x\n",
1094 fdc->status[0], fdc->status[1], fdc->status[2],
1095 fdc->status[3], fdc->status[4], fdc->status[5]);
1096 }
1097 retry_line = __LINE__;
1098 return (1);
1099 }
1100 /* All OK */
1101 switch(bp->bio_cmd) {
1102 case BIO_RDID:
1103 /* copy out ID field contents */
1104 idp = (struct fdc_readid *)bp->bio_data;
1105 idp->cyl = fdc->status[3];
1106 idp->head = fdc->status[4];
1107 idp->sec = fdc->status[5];
1108 idp->secshift = fdc->status[6];
1109 if (debugflags & 0x40)
1110 printf("c %d h %d s %d z %d\n",
1111 idp->cyl, idp->head, idp->sec, idp->secshift);
1112 break;
1113 case BIO_READ:
1114 case BIO_WRITE:
1115 bp->bio_pblkno += nsect;
1116 bp->bio_resid -= fd->fd_iosize;
1117 bp->bio_completed += fd->fd_iosize;
1118 fd->fd_ioptr += fd->fd_iosize;
1119 /* Since we managed to get something done, reset the retry */
1120 fdc->retry = 0;
1121 if (bp->bio_resid > 0)
1122 return (0);
1123 break;
1124 case BIO_FMT:
1125 break;
1126 }
1127 return (fdc_biodone(fdc, 0));
1128 }
1129
1130 static void
1131 fdc_thread(void *arg)
1132 {
1133 struct fdc_data *fdc;
1134
1135 fdc = arg;
1136 int i;
1137
1138 mtx_lock(&fdc->fdc_mtx);
1139 fdc->flags |= FDC_KTHREAD_ALIVE;
1140 while ((fdc->flags & FDC_KTHREAD_EXIT) == 0) {
1141 mtx_unlock(&fdc->fdc_mtx);
1142 i = fdc_worker(fdc);
1143 if (i && debugflags & 0x20) {
1144 if (fdc->bp != NULL) {
1145 g_print_bio(fdc->bp);
1146 printf("\n");
1147 }
1148 printf("Retry line %d\n", retry_line);
1149 }
1150 fdc->retry += i;
1151 mtx_lock(&fdc->fdc_mtx);
1152 }
1153 fdc->flags &= ~(FDC_KTHREAD_EXIT | FDC_KTHREAD_ALIVE);
1154 mtx_unlock(&fdc->fdc_mtx);
1155
1156 kproc_exit(0);
1157 }
1158
1159 /*
1160 * Enqueue a request.
1161 */
1162 static void
1163 fd_enqueue(struct fd_data *fd, struct bio *bp)
1164 {
1165 struct fdc_data *fdc;
1166 int call;
1167
1168 call = 0;
1169 fdc = fd->fdc;
1170 mtx_lock(&fdc->fdc_mtx);
1171 /* If we go from idle, cancel motor turnoff */
1172 if (fd->fd_iocount++ == 0)
1173 callout_stop(&fd->toffhandle);
1174 if (fd->flags & FD_MOTOR) {
1175 /* The motor is on, send it directly to the controller */
1176 bioq_disksort(&fdc->head, bp);
1177 wakeup(&fdc->head);
1178 } else {
1179 /* Queue it on the drive until the motor has started */
1180 bioq_insert_tail(&fd->fd_bq, bp);
1181 if (!(fd->flags & FD_MOTORWAIT))
1182 fd_motor(fd, 1);
1183 }
1184 mtx_unlock(&fdc->fdc_mtx);
1185 }
1186
1187 /*
1188 * Try to find out if we have a disk in the drive.
1189 */
1190 static int
1191 fd_probe_disk(struct fd_data *fd, int *recal)
1192 {
1193 struct fdc_data *fdc;
1194 int st0, st3, cyl;
1195 int oopts, ret;
1196
1197 fdc = fd->fdc;
1198 oopts = fd->options;
1199 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1200 ret = 1;
1201
1202 /*
1203 * First recal, then seek to cyl#1, this clears the old condition on
1204 * the disk change line so we can examine it for current status.
1205 */
1206 if (debugflags & 0x40)
1207 printf("New disk in probe\n");
1208 mtx_lock(&fdc->fdc_mtx);
1209 fd->flags |= FD_NEWDISK;
1210 mtx_unlock(&fdc->fdc_mtx);
1211 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
1212 goto done;
1213 tsleep(fdc, PRIBIO, "fdrecal", hz);
1214 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1215 goto done; /* XXX */
1216 if ((st0 & 0xc0) || cyl != 0)
1217 goto done;
1218
1219 /* Seek to track 1 */
1220 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, 1, 0))
1221 goto done;
1222 tsleep(fdc, PRIBIO, "fdseek", hz);
1223 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1224 goto done; /* XXX */
1225 *recal |= (1 << fd->fdsu);
1226 if (fdin_rd(fdc) & FDI_DCHG) {
1227 if (debugflags & 0x40)
1228 printf("Empty in probe\n");
1229 mtx_lock(&fdc->fdc_mtx);
1230 fd->flags |= FD_EMPTY;
1231 mtx_unlock(&fdc->fdc_mtx);
1232 } else {
1233 if (fdc_sense_drive(fdc, &st3) != 0)
1234 goto done;
1235 if (debugflags & 0x40)
1236 printf("Got disk in probe\n");
1237 mtx_lock(&fdc->fdc_mtx);
1238 fd->flags &= ~FD_EMPTY;
1239 if (st3 & NE7_ST3_WP)
1240 fd->flags |= FD_WP;
1241 else
1242 fd->flags &= ~FD_WP;
1243 mtx_unlock(&fdc->fdc_mtx);
1244 }
1245 ret = 0;
1246
1247 done:
1248 fd->options = oopts;
1249 return (ret);
1250 }
1251
1252 static int
1253 fdmisccmd(struct fd_data *fd, u_int cmd, void *data)
1254 {
1255 struct bio *bp;
1256 struct fd_formb *finfo;
1257 struct fdc_readid *idfield;
1258 int error;
1259
1260 bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO);
1261
1262 /*
1263 * Set up a bio request for fdstrategy(). bio_offset is faked
1264 * so that fdstrategy() will seek to the requested
1265 * cylinder, and use the desired head.
1266 */
1267 bp->bio_cmd = cmd;
1268 if (cmd == BIO_FMT) {
1269 finfo = (struct fd_formb *)data;
1270 bp->bio_pblkno =
1271 (finfo->cyl * fd->ft->heads + finfo->head) *
1272 fd->ft->sectrac;
1273 bp->bio_length = sizeof *finfo;
1274 } else if (cmd == BIO_RDID) {
1275 idfield = (struct fdc_readid *)data;
1276 bp->bio_pblkno =
1277 (idfield->cyl * fd->ft->heads + idfield->head) *
1278 fd->ft->sectrac;
1279 bp->bio_length = sizeof(struct fdc_readid);
1280 } else if (cmd == BIO_PROBE) {
1281 /* nothing */
1282 } else
1283 panic("wrong cmd in fdmisccmd()");
1284 bp->bio_offset = bp->bio_pblkno * fd->sectorsize;
1285 bp->bio_data = data;
1286 bp->bio_driver1 = fd;
1287 bp->bio_flags = 0;
1288
1289 fd_enqueue(fd, bp);
1290
1291 do {
1292 tsleep(bp, PRIBIO, "fdwait", hz);
1293 } while (!(bp->bio_flags & BIO_DONE));
1294 error = bp->bio_error;
1295
1296 free(bp, M_TEMP);
1297 return (error);
1298 }
1299
1300 /*
1301 * Try figuring out the density of the media present in our device.
1302 */
1303 static int
1304 fdautoselect(struct fd_data *fd)
1305 {
1306 struct fd_type *fdtp;
1307 struct fdc_readid id;
1308 int oopts, rv;
1309
1310 if (!(fd->ft->flags & FL_AUTO))
1311 return (0);
1312
1313 fdtp = fd_native_types[fd->type];
1314 fdsettype(fd, fdtp);
1315 if (!(fd->ft->flags & FL_AUTO))
1316 return (0);
1317
1318 /*
1319 * Try reading sector ID fields, first at cylinder 0, head 0,
1320 * then at cylinder 2, head N. We don't probe cylinder 1,
1321 * since for 5.25in DD media in a HD drive, there are no data
1322 * to read (2 step pulses per media cylinder required). For
1323 * two-sided media, the second probe always goes to head 1, so
1324 * we can tell them apart from single-sided media. As a
1325 * side-effect this means that single-sided media should be
1326 * mentioned in the search list after two-sided media of an
1327 * otherwise identical density. Media with a different number
1328 * of sectors per track but otherwise identical parameters
1329 * cannot be distinguished at all.
1330 *
1331 * If we successfully read an ID field on both cylinders where
1332 * the recorded values match our expectation, we are done.
1333 * Otherwise, we try the next density entry from the table.
1334 *
1335 * Stepping to cylinder 2 has the side-effect of clearing the
1336 * unit attention bit.
1337 */
1338 oopts = fd->options;
1339 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1340 for (; fdtp->heads; fdtp++) {
1341 fdsettype(fd, fdtp);
1342
1343 id.cyl = id.head = 0;
1344 rv = fdmisccmd(fd, BIO_RDID, &id);
1345 if (rv != 0)
1346 continue;
1347 if (id.cyl != 0 || id.head != 0 || id.secshift != fdtp->secsize)
1348 continue;
1349 id.cyl = 2;
1350 id.head = fd->ft->heads - 1;
1351 rv = fdmisccmd(fd, BIO_RDID, &id);
1352 if (id.cyl != 2 || id.head != fdtp->heads - 1 ||
1353 id.secshift != fdtp->secsize)
1354 continue;
1355 if (rv == 0)
1356 break;
1357 }
1358
1359 fd->options = oopts;
1360 if (fdtp->heads == 0) {
1361 if (debugflags & 0x40)
1362 device_printf(fd->dev, "autoselection failed\n");
1363 fdsettype(fd, fd_native_types[fd->type]);
1364 return (-1);
1365 } else {
1366 if (debugflags & 0x40) {
1367 device_printf(fd->dev,
1368 "autoselected %d KB medium\n", fd->ft->size / 2);
1369 fdprinttype(fd->ft);
1370 }
1371 return (0);
1372 }
1373 }
1374
1375 /*
1376 * GEOM class implementation
1377 */
1378
1379 static g_access_t fd_access;
1380 static g_start_t fd_start;
1381 static g_ioctl_t fd_ioctl;
1382
1383 struct g_class g_fd_class = {
1384 .name = "FD",
1385 .version = G_VERSION,
1386 .start = fd_start,
1387 .access = fd_access,
1388 .ioctl = fd_ioctl,
1389 };
1390
1391 static int
1392 fd_access(struct g_provider *pp, int r, int w, int e)
1393 {
1394 struct fd_data *fd;
1395 struct fdc_data *fdc;
1396 int ar, aw, ae;
1397 int busy;
1398
1399 fd = pp->geom->softc;
1400 fdc = fd->fdc;
1401
1402 /*
1403 * If our provider is withering, we can only get negative requests
1404 * and we don't want to even see them
1405 */
1406 if (pp->flags & G_PF_WITHER)
1407 return (0);
1408
1409 ar = r + pp->acr;
1410 aw = w + pp->acw;
1411 ae = e + pp->ace;
1412
1413 if (ar == 0 && aw == 0 && ae == 0) {
1414 device_unbusy(fd->dev);
1415 return (0);
1416 }
1417
1418 busy = 0;
1419 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) {
1420 if (fdmisccmd(fd, BIO_PROBE, NULL))
1421 return (ENXIO);
1422 if (fd->flags & FD_EMPTY)
1423 return (ENXIO);
1424 if (fd->flags & FD_NEWDISK) {
1425 if (fdautoselect(fd) != 0 &&
1426 (device_get_flags(fd->dev) & FD_NO_CHLINE)) {
1427 mtx_lock(&fdc->fdc_mtx);
1428 fd->flags |= FD_EMPTY;
1429 mtx_unlock(&fdc->fdc_mtx);
1430 return (ENXIO);
1431 }
1432 mtx_lock(&fdc->fdc_mtx);
1433 fd->flags &= ~FD_NEWDISK;
1434 mtx_unlock(&fdc->fdc_mtx);
1435 }
1436 device_busy(fd->dev);
1437 busy = 1;
1438 }
1439
1440 if (w > 0 && (fd->flags & FD_WP)) {
1441 if (busy)
1442 device_unbusy(fd->dev);
1443 return (EROFS);
1444 }
1445
1446 pp->sectorsize = fd->sectorsize;
1447 pp->stripesize = fd->ft->heads * fd->ft->sectrac * fd->sectorsize;
1448 pp->mediasize = pp->stripesize * fd->ft->tracks;
1449 return (0);
1450 }
1451
1452 static void
1453 fd_start(struct bio *bp)
1454 {
1455 struct fdc_data * fdc;
1456 struct fd_data * fd;
1457
1458 fd = bp->bio_to->geom->softc;
1459 fdc = fd->fdc;
1460 bp->bio_driver1 = fd;
1461 if (bp->bio_cmd & BIO_GETATTR) {
1462 if (g_handleattr_int(bp, "GEOM::fwsectors", fd->ft->sectrac))
1463 return;
1464 if (g_handleattr_int(bp, "GEOM::fwheads", fd->ft->heads))
1465 return;
1466 g_io_deliver(bp, ENOIOCTL);
1467 return;
1468 }
1469 if (!(bp->bio_cmd & (BIO_READ|BIO_WRITE))) {
1470 g_io_deliver(bp, EOPNOTSUPP);
1471 return;
1472 }
1473 bp->bio_pblkno = bp->bio_offset / fd->sectorsize;
1474 bp->bio_resid = bp->bio_length;
1475 fd_enqueue(fd, bp);
1476 return;
1477 }
1478
1479 static int
1480 fd_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td)
1481 {
1482 struct fd_data *fd;
1483 struct fdc_status *fsp;
1484 struct fdc_readid *rid;
1485 int error;
1486
1487 fd = pp->geom->softc;
1488
1489 switch (cmd) {
1490 case FD_GTYPE: /* get drive type */
1491 *(struct fd_type *)data = *fd->ft;
1492 return (0);
1493
1494 case FD_STYPE: /* set drive type */
1495 /*
1496 * Allow setting drive type temporarily iff
1497 * currently unset. Used for fdformat so any
1498 * user can set it, and then start formatting.
1499 */
1500 fd->fts = *(struct fd_type *)data;
1501 if (fd->fts.sectrac) {
1502 /* XXX: check for rubbish */
1503 fdsettype(fd, &fd->fts);
1504 } else {
1505 fdsettype(fd, fd_native_types[fd->type]);
1506 }
1507 if (debugflags & 0x40)
1508 fdprinttype(fd->ft);
1509 return (0);
1510
1511 case FD_GOPTS: /* get drive options */
1512 *(int *)data = fd->options;
1513 return (0);
1514
1515 case FD_SOPTS: /* set drive options */
1516 fd->options = *(int *)data;
1517 return (0);
1518
1519 case FD_CLRERR:
1520 error = priv_check(td, PRIV_DRIVER);
1521 if (error)
1522 return (error);
1523 fd->fdc->fdc_errs = 0;
1524 return (0);
1525
1526 case FD_GSTAT:
1527 fsp = (struct fdc_status *)data;
1528 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
1529 return (EINVAL);
1530 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
1531 return (0);
1532
1533 case FD_GDTYPE:
1534 *(enum fd_drivetype *)data = fd->type;
1535 return (0);
1536
1537 case FD_FORM:
1538 if (!(fflag & FWRITE))
1539 return (EPERM);
1540 if (((struct fd_formb *)data)->format_version !=
1541 FD_FORMAT_VERSION)
1542 return (EINVAL); /* wrong version of formatting prog */
1543 error = fdmisccmd(fd, BIO_FMT, data);
1544 mtx_lock(&fd->fdc->fdc_mtx);
1545 fd->flags |= FD_NEWDISK;
1546 mtx_unlock(&fd->fdc->fdc_mtx);
1547 break;
1548
1549 case FD_READID:
1550 rid = (struct fdc_readid *)data;
1551 if (rid->cyl > 85 || rid->head > 1)
1552 return (EINVAL);
1553 error = fdmisccmd(fd, BIO_RDID, data);
1554 break;
1555
1556 case FIONBIO:
1557 case FIOASYNC:
1558 /* For backwards compat with old fd*(8) tools */
1559 error = 0;
1560 break;
1561
1562 default:
1563 if (debugflags & 0x80)
1564 printf("Unknown ioctl %lx\n", cmd);
1565 error = ENOIOCTL;
1566 break;
1567 }
1568 return (error);
1569 };
1570
1571
1572
1573 /*
1574 * Configuration/initialization stuff, per controller.
1575 */
1576
1577 devclass_t fdc_devclass;
1578 static devclass_t fd_devclass;
1579
1580 struct fdc_ivars {
1581 int fdunit;
1582 int fdtype;
1583 };
1584
1585 void
1586 fdc_release_resources(struct fdc_data *fdc)
1587 {
1588 device_t dev;
1589 struct resource *last;
1590 int i;
1591
1592 dev = fdc->fdc_dev;
1593 if (fdc->fdc_intr)
1594 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1595 fdc->fdc_intr = NULL;
1596 if (fdc->res_irq != NULL)
1597 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
1598 fdc->res_irq);
1599 fdc->res_irq = NULL;
1600 last = NULL;
1601 for (i = 0; i < FDC_MAXREG; i++) {
1602 if (fdc->resio[i] != NULL && fdc->resio[i] != last) {
1603 bus_release_resource(dev, SYS_RES_IOPORT,
1604 fdc->ridio[i], fdc->resio[i]);
1605 last = fdc->resio[i];
1606 fdc->resio[i] = NULL;
1607 }
1608 }
1609 if (fdc->res_drq != NULL)
1610 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
1611 fdc->res_drq);
1612 fdc->res_drq = NULL;
1613 }
1614
1615 int
1616 fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
1617 {
1618 struct fdc_ivars *ivars = device_get_ivars(child);
1619
1620 switch (which) {
1621 case FDC_IVAR_FDUNIT:
1622 *result = ivars->fdunit;
1623 break;
1624 case FDC_IVAR_FDTYPE:
1625 *result = ivars->fdtype;
1626 break;
1627 default:
1628 return (ENOENT);
1629 }
1630 return (0);
1631 }
1632
1633 int
1634 fdc_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
1635 {
1636 struct fdc_ivars *ivars = device_get_ivars(child);
1637
1638 switch (which) {
1639 case FDC_IVAR_FDUNIT:
1640 ivars->fdunit = value;
1641 break;
1642 case FDC_IVAR_FDTYPE:
1643 ivars->fdtype = value;
1644 break;
1645 default:
1646 return (ENOENT);
1647 }
1648 return (0);
1649 }
1650
1651 int
1652 fdc_initial_reset(device_t dev, struct fdc_data *fdc)
1653 {
1654 int ic_type, part_id;
1655
1656 /*
1657 * A status value of 0xff is very unlikely, but not theoretically
1658 * impossible, but it is far more likely to indicate an empty bus.
1659 */
1660 if (fdsts_rd(fdc) == 0xff)
1661 return (ENXIO);
1662
1663 /*
1664 * Assert a reset to the floppy controller and check that the status
1665 * register goes to zero.
1666 */
1667 fdout_wr(fdc, 0);
1668 fdout_wr(fdc, 0);
1669 if (fdsts_rd(fdc) != 0)
1670 return (ENXIO);
1671
1672 /*
1673 * Clear the reset and see it come ready.
1674 */
1675 fdout_wr(fdc, FDO_FRST);
1676 DELAY(100);
1677 if (fdsts_rd(fdc) != 0x80)
1678 return (ENXIO);
1679
1680 /* Then, see if it can handle a command. */
1681 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, 0xaf, 0x1e, 0))
1682 return (ENXIO);
1683
1684 /*
1685 * Try to identify the chip.
1686 *
1687 * The i8272 datasheet documents that unknown commands
1688 * will return ST0 as 0x80. The i8272 is supposedly identical
1689 * to the NEC765.
1690 * The i82077SL datasheet says 0x90 for the VERSION command,
1691 * and several "superio" chips emulate this.
1692 */
1693 if (fdc_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type))
1694 return (ENXIO);
1695 if (fdc_cmd(fdc, 1, 0x18, 1, &part_id))
1696 return (ENXIO);
1697 if (bootverbose)
1698 device_printf(dev,
1699 "ic_type %02x part_id %02x\n", ic_type, part_id);
1700 switch (ic_type & 0xff) {
1701 case 0x80:
1702 device_set_desc(dev, "NEC 765 or clone");
1703 fdc->fdct = FDC_NE765;
1704 break;
1705 case 0x81:
1706 case 0x90:
1707 device_set_desc(dev,
1708 "Enhanced floppy controller");
1709 fdc->fdct = FDC_ENHANCED;
1710 break;
1711 default:
1712 device_set_desc(dev, "Generic floppy controller");
1713 fdc->fdct = FDC_UNKNOWN;
1714 break;
1715 }
1716 return (0);
1717 }
1718
1719 int
1720 fdc_detach(device_t dev)
1721 {
1722 struct fdc_data *fdc;
1723 int error;
1724
1725 fdc = device_get_softc(dev);
1726
1727 /* have our children detached first */
1728 if ((error = bus_generic_detach(dev)))
1729 return (error);
1730
1731 if (fdc->fdc_intr)
1732 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1733 fdc->fdc_intr = NULL;
1734
1735 /* kill worker thread */
1736 mtx_lock(&fdc->fdc_mtx);
1737 fdc->flags |= FDC_KTHREAD_EXIT;
1738 wakeup(&fdc->head);
1739 while ((fdc->flags & FDC_KTHREAD_ALIVE) != 0)
1740 msleep(fdc->fdc_thread, &fdc->fdc_mtx, PRIBIO, "fdcdet", 0);
1741 mtx_unlock(&fdc->fdc_mtx);
1742
1743 /* reset controller, turn motor off */
1744 fdout_wr(fdc, 0);
1745
1746 if (!(fdc->flags & FDC_NODMA))
1747 isa_dma_release(fdc->dmachan);
1748 fdc_release_resources(fdc);
1749 mtx_destroy(&fdc->fdc_mtx);
1750 return (0);
1751 }
1752
1753 /*
1754 * Add a child device to the fdc controller. It will then be probed etc.
1755 */
1756 device_t
1757 fdc_add_child(device_t dev, const char *name, int unit)
1758 {
1759 struct fdc_ivars *ivar;
1760 device_t child;
1761
1762 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO);
1763 if (ivar == NULL)
1764 return (NULL);
1765 child = device_add_child(dev, name, unit);
1766 if (child == NULL) {
1767 free(ivar, M_DEVBUF);
1768 return (NULL);
1769 }
1770 device_set_ivars(child, ivar);
1771 ivar->fdunit = unit;
1772 ivar->fdtype = FDT_NONE;
1773 if (resource_disabled(name, unit))
1774 device_disable(child);
1775 return (child);
1776 }
1777
1778 int
1779 fdc_attach(device_t dev)
1780 {
1781 struct fdc_data *fdc;
1782 int error;
1783
1784 fdc = device_get_softc(dev);
1785 fdc->fdc_dev = dev;
1786 error = fdc_initial_reset(dev, fdc);
1787 if (error) {
1788 device_printf(dev, "does not respond\n");
1789 return (error);
1790 }
1791 error = bus_setup_intr(dev, fdc->res_irq,
1792 INTR_TYPE_BIO | INTR_ENTROPY |
1793 ((fdc->flags & FDC_NOFAST) ? INTR_MPSAFE : 0),
1794 ((fdc->flags & FDC_NOFAST) ? NULL : fdc_intr_fast),
1795 ((fdc->flags & FDC_NOFAST) ? fdc_intr : NULL),
1796 fdc, &fdc->fdc_intr);
1797 if (error) {
1798 device_printf(dev, "cannot setup interrupt\n");
1799 return (error);
1800 }
1801 if (!(fdc->flags & FDC_NODMA)) {
1802 error = isa_dma_acquire(fdc->dmachan);
1803 if (!error) {
1804 error = isa_dma_init(fdc->dmachan,
1805 MAX_BYTES_PER_CYL, M_WAITOK);
1806 if (error)
1807 isa_dma_release(fdc->dmachan);
1808 }
1809 if (error)
1810 return (error);
1811 }
1812 fdc->fdcu = device_get_unit(dev);
1813 fdc->flags |= FDC_NEEDS_RESET;
1814
1815 mtx_init(&fdc->fdc_mtx, "fdc lock", NULL, MTX_DEF);
1816
1817 /* reset controller, turn motor off, clear fdout mirror reg */
1818 fdout_wr(fdc, fdc->fdout = 0);
1819 bioq_init(&fdc->head);
1820
1821 kproc_create(fdc_thread, fdc, &fdc->fdc_thread, 0, 0,
1822 "fdc%d", device_get_unit(dev));
1823
1824 settle = hz / 8;
1825
1826 return (0);
1827 }
1828
1829 int
1830 fdc_hints_probe(device_t dev)
1831 {
1832 const char *name, *dname;
1833 int i, error, dunit;
1834
1835 /*
1836 * Probe and attach any children. We should probably detect
1837 * devices from the BIOS unless overridden.
1838 */
1839 name = device_get_nameunit(dev);
1840 i = 0;
1841 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) {
1842 resource_int_value(dname, dunit, "drive", &dunit);
1843 fdc_add_child(dev, dname, dunit);
1844 }
1845
1846 if ((error = bus_generic_attach(dev)) != 0)
1847 return (error);
1848 return (0);
1849 }
1850
1851 int
1852 fdc_print_child(device_t me, device_t child)
1853 {
1854 int retval = 0, flags;
1855
1856 retval += bus_print_child_header(me, child);
1857 retval += printf(" on %s drive %d", device_get_nameunit(me),
1858 fdc_get_fdunit(child));
1859 if ((flags = device_get_flags(me)) != 0)
1860 retval += printf(" flags %#x", flags);
1861 retval += printf("\n");
1862
1863 return (retval);
1864 }
1865
1866 /*
1867 * Configuration/initialization, per drive.
1868 */
1869 static int
1870 fd_probe(device_t dev)
1871 {
1872 int i, unit;
1873 u_int st0, st3;
1874 struct fd_data *fd;
1875 struct fdc_data *fdc;
1876 int fdsu;
1877 int flags, type;
1878
1879 fdsu = fdc_get_fdunit(dev);
1880 fd = device_get_softc(dev);
1881 fdc = device_get_softc(device_get_parent(dev));
1882 flags = device_get_flags(dev);
1883
1884 fd->dev = dev;
1885 fd->fdc = fdc;
1886 fd->fdsu = fdsu;
1887 unit = device_get_unit(dev);
1888
1889 /* Auto-probe if fdinfo is present, but always allow override. */
1890 type = flags & FD_TYPEMASK;
1891 if (type == FDT_NONE && (type = fdc_get_fdtype(dev)) != FDT_NONE) {
1892 fd->type = type;
1893 goto done;
1894 } else {
1895 /* make sure fdautoselect() will be called */
1896 fd->flags = FD_EMPTY;
1897 fd->type = type;
1898 }
1899
1900 #if (defined(__i386__) && !defined(PC98)) || defined(__amd64__)
1901 if (fd->type == FDT_NONE && (unit == 0 || unit == 1)) {
1902 /* Look up what the BIOS thinks we have. */
1903 if (unit == 0)
1904 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4;
1905 else
1906 fd->type = rtcin(RTC_FDISKETTE) & 0x0f;
1907 if (fd->type == FDT_288M_1)
1908 fd->type = FDT_288M;
1909 }
1910 #endif /* __i386__ || __amd64__ */
1911 /* is there a unit? */
1912 if (fd->type == FDT_NONE)
1913 return (ENXIO);
1914
1915 /*
1916 mtx_lock(&fdc->fdc_mtx);
1917 */
1918 /* select it */
1919 fd_select(fd);
1920 fd_motor(fd, 1);
1921 fdc->fd = fd;
1922 fdc_reset(fdc); /* XXX reset, then unreset, etc. */
1923 DELAY(1000000); /* 1 sec */
1924
1925 if ((flags & FD_NO_PROBE) == 0) {
1926 /* If we're at track 0 first seek inwards. */
1927 if ((fdc_sense_drive(fdc, &st3) == 0) &&
1928 (st3 & NE7_ST3_T0)) {
1929 /* Seek some steps... */
1930 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
1931 /* ...wait a moment... */
1932 DELAY(300000);
1933 /* make ctrlr happy: */
1934 fdc_sense_int(fdc, NULL, NULL);
1935 }
1936 }
1937
1938 for (i = 0; i < 2; i++) {
1939 /*
1940 * we must recalibrate twice, just in case the
1941 * heads have been beyond cylinder 76, since
1942 * most FDCs still barf when attempting to
1943 * recalibrate more than 77 steps
1944 */
1945 /* go back to 0: */
1946 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
1947 /* a second being enough for full stroke seek*/
1948 DELAY(i == 0 ? 1000000 : 300000);
1949
1950 /* anything responding? */
1951 if (fdc_sense_int(fdc, &st0, NULL) == 0 &&
1952 (st0 & NE7_ST0_EC) == 0)
1953 break; /* already probed succesfully */
1954 }
1955 }
1956 }
1957
1958 fd_motor(fd, 0);
1959 fdc->fd = NULL;
1960 /*
1961 mtx_unlock(&fdc->fdc_mtx);
1962 */
1963
1964 if ((flags & FD_NO_PROBE) == 0 &&
1965 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */
1966 return (ENXIO);
1967
1968 done:
1969
1970 switch (fd->type) {
1971 case FDT_12M:
1972 device_set_desc(dev, "1200-KB 5.25\" drive");
1973 break;
1974 case FDT_144M:
1975 device_set_desc(dev, "1440-KB 3.5\" drive");
1976 break;
1977 case FDT_288M:
1978 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
1979 break;
1980 case FDT_360K:
1981 device_set_desc(dev, "360-KB 5.25\" drive");
1982 break;
1983 case FDT_720K:
1984 device_set_desc(dev, "720-KB 3.5\" drive");
1985 break;
1986 default:
1987 return (ENXIO);
1988 }
1989 fd->track = FD_NO_TRACK;
1990 fd->fdc = fdc;
1991 fd->fdsu = fdsu;
1992 fd->options = 0;
1993 callout_init_mtx(&fd->toffhandle, &fd->fdc->fdc_mtx, 0);
1994
1995 /* initialize densities for subdevices */
1996 fdsettype(fd, fd_native_types[fd->type]);
1997 return (0);
1998 }
1999
2000 /*
2001 * We have to do this in a geom event because GEOM is not running
2002 * when fd_attach() is.
2003 * XXX: move fd_attach after geom like ata/scsi disks
2004 */
2005 static void
2006 fd_attach2(void *arg, int flag)
2007 {
2008 struct fd_data *fd;
2009
2010 fd = arg;
2011
2012 fd->fd_geom = g_new_geomf(&g_fd_class,
2013 "fd%d", device_get_unit(fd->dev));
2014 fd->fd_provider = g_new_providerf(fd->fd_geom, fd->fd_geom->name);
2015 fd->fd_geom->softc = fd;
2016 g_error_provider(fd->fd_provider, 0);
2017 }
2018
2019 static int
2020 fd_attach(device_t dev)
2021 {
2022 struct fd_data *fd;
2023
2024 fd = device_get_softc(dev);
2025 g_post_event(fd_attach2, fd, M_WAITOK, NULL);
2026 fd->flags |= FD_EMPTY;
2027 bioq_init(&fd->fd_bq);
2028
2029 return (0);
2030 }
2031
2032 static void
2033 fd_detach_geom(void *arg, int flag)
2034 {
2035 struct fd_data *fd = arg;
2036
2037 g_topology_assert();
2038 g_wither_geom(fd->fd_geom, ENXIO);
2039 }
2040
2041 static int
2042 fd_detach(device_t dev)
2043 {
2044 struct fd_data *fd;
2045
2046 fd = device_get_softc(dev);
2047 g_waitfor_event(fd_detach_geom, fd, M_WAITOK, NULL);
2048 while (device_get_state(dev) == DS_BUSY)
2049 tsleep(fd, PZERO, "fdd", hz/10);
2050 callout_drain(&fd->toffhandle);
2051
2052 return (0);
2053 }
2054
2055 static device_method_t fd_methods[] = {
2056 /* Device interface */
2057 DEVMETHOD(device_probe, fd_probe),
2058 DEVMETHOD(device_attach, fd_attach),
2059 DEVMETHOD(device_detach, fd_detach),
2060 DEVMETHOD(device_shutdown, bus_generic_shutdown),
2061 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
2062 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
2063 { 0, 0 }
2064 };
2065
2066 static driver_t fd_driver = {
2067 "fd",
2068 fd_methods,
2069 sizeof(struct fd_data)
2070 };
2071
2072 static int
2073 fdc_modevent(module_t mod, int type, void *data)
2074 {
2075
2076 return (g_modevent(NULL, type, &g_fd_class));
2077 }
2078
2079 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, fdc_modevent, 0);
Cache object: 8edd65535e26dd4e5f6eb32bf114374b
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