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/8.4/sys/dev/fdc/fdc.c 218992 2011-02-24 10:23:22Z 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 mtx_lock(&Giant);
785 isa_dmadone(
786 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE,
787 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
788 mtx_unlock(&Giant);
789 mtx_lock(&fdc->fdc_mtx);
790 fd->flags &= ~FD_ISADMA;
791 mtx_unlock(&fdc->fdc_mtx);
792 }
793
794 /* Unwedge the controller ? */
795 if (fdc->flags & FDC_NEEDS_RESET) {
796 fdc->flags &= ~FDC_NEEDS_RESET;
797 fdc_reset(fdc);
798 tsleep(fdc, PRIBIO, "fdcrst", hz);
799 /* Discard results */
800 for (i = 0; i < 4; i++)
801 fdc_sense_int(fdc, &st0, &cyl);
802 /* All drives must recal */
803 need_recal = 0xf;
804 }
805
806 /* Pick up a request, if need be wait for it */
807 if (fdc->bp == NULL) {
808 mtx_lock(&fdc->fdc_mtx);
809 do {
810 fdc->bp = bioq_takefirst(&fdc->head);
811 if (fdc->bp == NULL)
812 msleep(&fdc->head, &fdc->fdc_mtx,
813 PRIBIO, "-", hz);
814 } while (fdc->bp == NULL &&
815 (fdc->flags & FDC_KTHREAD_EXIT) == 0);
816 mtx_unlock(&fdc->fdc_mtx);
817
818 if (fdc->bp == NULL)
819 /*
820 * Nothing to do, worker thread has been
821 * requested to stop.
822 */
823 return (0);
824
825 bp = fdc->bp;
826 fd = fdc->fd = bp->bio_driver1;
827 fdc->retry = 0;
828 fd->fd_ioptr = bp->bio_data;
829 if (bp->bio_cmd & BIO_FMT) {
830 i = offsetof(struct fd_formb, fd_formb_cylno(0));
831 fd->fd_ioptr += i;
832 fd->fd_iosize = bp->bio_length - i;
833 }
834 }
835
836 /* Select drive, setup params */
837 fd_select(fd);
838 if (fdc->fdct == FDC_ENHANCED)
839 fddsr_wr(fdc, fd->ft->trans);
840 else
841 fdctl_wr(fdc, fd->ft->trans);
842
843 if (bp->bio_cmd & BIO_PROBE) {
844 if ((!(device_get_flags(fd->dev) & FD_NO_CHLINE) &&
845 !(fdin_rd(fdc) & FDI_DCHG) &&
846 !(fd->flags & FD_EMPTY)) ||
847 fd_probe_disk(fd, &need_recal) == 0)
848 return (fdc_biodone(fdc, 0));
849 return (1);
850 }
851
852 /*
853 * If we are dead just flush the requests
854 */
855 if (fd->flags & FD_EMPTY)
856 return (fdc_biodone(fdc, ENXIO));
857
858 /* Check if we lost our media */
859 if (fdin_rd(fdc) & FDI_DCHG) {
860 if (debugflags & 0x40)
861 printf("Lost disk\n");
862 mtx_lock(&fdc->fdc_mtx);
863 fd->flags |= FD_EMPTY;
864 fd->flags |= FD_NEWDISK;
865 mtx_unlock(&fdc->fdc_mtx);
866 g_topology_lock();
867 g_orphan_provider(fd->fd_provider, ENXIO);
868 fd->fd_provider->flags |= G_PF_WITHER;
869 fd->fd_provider =
870 g_new_providerf(fd->fd_geom, fd->fd_geom->name);
871 g_error_provider(fd->fd_provider, 0);
872 g_topology_unlock();
873 return (fdc_biodone(fdc, ENXIO));
874 }
875
876 /* Check if the floppy is write-protected */
877 if(bp->bio_cmd & (BIO_FMT | BIO_WRITE)) {
878 retry_line = __LINE__;
879 if(fdc_sense_drive(fdc, &st3) != 0)
880 return (1);
881 if(st3 & NE7_ST3_WP)
882 return (fdc_biodone(fdc, EROFS));
883 }
884
885 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0;
886 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1;
887 i = fd->ft->sectrac * fd->ft->heads;
888 cylinder = bp->bio_pblkno / i;
889 descyl = cylinder * steptrac;
890 sec = bp->bio_pblkno % i;
891 nsect = i - sec;
892 head = sec / fd->ft->sectrac;
893 sec = sec % fd->ft->sectrac + 1;
894
895 /* If everything is going swimmingly, use multisector xfer */
896 if (fdc->retry == 0 && bp->bio_cmd & (BIO_READ|BIO_WRITE)) {
897 fd->fd_iosize = imin(nsect * fd->sectorsize, bp->bio_resid);
898 nsect = fd->fd_iosize / fd->sectorsize;
899 } else if (bp->bio_cmd & (BIO_READ|BIO_WRITE)) {
900 fd->fd_iosize = fd->sectorsize;
901 nsect = 1;
902 }
903
904 /* Do RECAL if we need to or are going to track zero anyway */
905 if ((need_recal & (1 << fd->fdsu)) ||
906 (cylinder == 0 && fd->track != 0) ||
907 fdc->retry > 2) {
908 retry_line = __LINE__;
909 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
910 return (1);
911 tsleep(fdc, PRIBIO, "fdrecal", hz);
912 retry_line = __LINE__;
913 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
914 return (1); /* XXX */
915 retry_line = __LINE__;
916 if ((st0 & 0xc0) || cyl != 0)
917 return (1);
918 need_recal &= ~(1 << fd->fdsu);
919 fd->track = 0;
920 /* let the heads settle */
921 if (settle)
922 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
923 }
924
925 /*
926 * SEEK to where we want to be
927 *
928 * Enhanced controllers do implied seeks for read&write as long as
929 * we do not need multiple steps per track.
930 */
931 if (cylinder != fd->track && (
932 fdc->fdct != FDC_ENHANCED ||
933 descyl != cylinder ||
934 (bp->bio_cmd & (BIO_RDID|BIO_FMT)))) {
935 retry_line = __LINE__;
936 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, descyl, 0))
937 return (1);
938 tsleep(fdc, PRIBIO, "fdseek", hz);
939 retry_line = __LINE__;
940 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
941 return (1); /* XXX */
942 retry_line = __LINE__;
943 if ((st0 & 0xc0) || cyl != descyl) {
944 need_recal |= (1 << fd->fdsu);
945 return (1);
946 }
947 /* let the heads settle */
948 if (settle)
949 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
950 }
951 fd->track = cylinder;
952
953 if (debugflags & 8)
954 printf("op %x bn %ju siz %u ptr %p retry %d\n",
955 bp->bio_cmd, bp->bio_pblkno, fd->fd_iosize,
956 fd->fd_ioptr, fdc->retry);
957
958 /* Setup ISADMA if we need it and have it */
959 if ((bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_FMT))
960 && !(fdc->flags & FDC_NODMA)) {
961 mtx_lock(&Giant);
962 isa_dmastart(
963 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE,
964 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
965 mtx_unlock(&Giant);
966 mtx_lock(&fdc->fdc_mtx);
967 fd->flags |= FD_ISADMA;
968 mtx_unlock(&fdc->fdc_mtx);
969 }
970
971 /* Do PIO if we have to */
972 if (fdc->flags & FDC_NODMA) {
973 if (bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_FMT))
974 fdbcdr_wr(fdc, 1, fd->fd_iosize);
975 if (bp->bio_cmd & (BIO_WRITE|BIO_FMT))
976 fdc_pio(fdc);
977 }
978
979 switch(bp->bio_cmd) {
980 case BIO_FMT:
981 /* formatting */
982 finfo = (struct fd_formb *)bp->bio_data;
983 retry_line = __LINE__;
984 if (fdc_cmd(fdc, 6,
985 NE7CMD_FORMAT | mfm,
986 head << 2 | fd->fdsu,
987 finfo->fd_formb_secshift,
988 finfo->fd_formb_nsecs,
989 finfo->fd_formb_gaplen,
990 finfo->fd_formb_fillbyte, 0))
991 return (1);
992 break;
993 case BIO_RDID:
994 retry_line = __LINE__;
995 if (fdc_cmd(fdc, 2,
996 NE7CMD_READID | mfm,
997 head << 2 | fd->fdsu, 0))
998 return (1);
999 break;
1000 case BIO_READ:
1001 retry_line = __LINE__;
1002 if (fdc_cmd(fdc, 9,
1003 NE7CMD_READ | NE7CMD_SK | mfm | NE7CMD_MT,
1004 head << 2 | fd->fdsu, /* head & unit */
1005 fd->track, /* track */
1006 head, /* head */
1007 sec, /* sector + 1 */
1008 fd->ft->secsize, /* sector size */
1009 fd->ft->sectrac, /* sectors/track */
1010 fd->ft->gap, /* gap size */
1011 fd->ft->datalen, /* data length */
1012 0))
1013 return (1);
1014 break;
1015 case BIO_WRITE:
1016 retry_line = __LINE__;
1017 if (fdc_cmd(fdc, 9,
1018 NE7CMD_WRITE | mfm | NE7CMD_MT,
1019 head << 2 | fd->fdsu, /* head & unit */
1020 fd->track, /* track */
1021 head, /* head */
1022 sec, /* sector + 1 */
1023 fd->ft->secsize, /* sector size */
1024 fd->ft->sectrac, /* sectors/track */
1025 fd->ft->gap, /* gap size */
1026 fd->ft->datalen, /* data length */
1027 0))
1028 return (1);
1029 break;
1030 default:
1031 KASSERT(0 == 1, ("Wrong bio_cmd %x\n", bp->bio_cmd));
1032 }
1033
1034 /* Wait for interrupt */
1035 i = tsleep(fdc, PRIBIO, "fddata", hz);
1036
1037 /* PIO if the read looks good */
1038 if (i == 0 && (fdc->flags & FDC_NODMA) && (bp->bio_cmd & BIO_READ))
1039 fdc_pio(fdc);
1040
1041 /* Finish DMA */
1042 if (fd->flags & FD_ISADMA) {
1043 mtx_lock(&Giant);
1044 isa_dmadone(
1045 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE,
1046 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
1047 mtx_unlock(&Giant);
1048 mtx_lock(&fdc->fdc_mtx);
1049 fd->flags &= ~FD_ISADMA;
1050 mtx_unlock(&fdc->fdc_mtx);
1051 }
1052
1053 if (i != 0) {
1054 /*
1055 * Timeout.
1056 *
1057 * Due to IBM's brain-dead design, the FDC has a faked ready
1058 * signal, hardwired to ready == true. Thus, any command
1059 * issued if there's no diskette in the drive will _never_
1060 * complete, and must be aborted by resetting the FDC.
1061 * Many thanks, Big Blue!
1062 */
1063 retry_line = __LINE__;
1064 fdc->flags |= FDC_NEEDS_RESET;
1065 return (1);
1066 }
1067
1068 retry_line = __LINE__;
1069 if (fdc_read_status(fdc))
1070 return (1);
1071
1072 if (debugflags & 0x10)
1073 printf(" -> %x %x %x %x\n",
1074 fdc->status[0], fdc->status[1],
1075 fdc->status[2], fdc->status[3]);
1076
1077 st0 = fdc->status[0] & NE7_ST0_IC;
1078 if (st0 != 0) {
1079 retry_line = __LINE__;
1080 if (st0 == NE7_ST0_IC_AT && fdc->status[1] & NE7_ST1_OR) {
1081 /*
1082 * DMA overrun. Someone hogged the bus and
1083 * didn't release it in time for the next
1084 * FDC transfer.
1085 */
1086 return (1);
1087 }
1088 retry_line = __LINE__;
1089 if(st0 == NE7_ST0_IC_IV) {
1090 fdc->flags |= FDC_NEEDS_RESET;
1091 return (1);
1092 }
1093 retry_line = __LINE__;
1094 if(st0 == NE7_ST0_IC_AT && fdc->status[2] & NE7_ST2_WC) {
1095 need_recal |= (1 << fd->fdsu);
1096 return (1);
1097 }
1098 if (debugflags & 0x20) {
1099 printf("status %02x %02x %02x %02x %02x %02x\n",
1100 fdc->status[0], fdc->status[1], fdc->status[2],
1101 fdc->status[3], fdc->status[4], fdc->status[5]);
1102 }
1103 retry_line = __LINE__;
1104 return (1);
1105 }
1106 /* All OK */
1107 switch(bp->bio_cmd) {
1108 case BIO_RDID:
1109 /* copy out ID field contents */
1110 idp = (struct fdc_readid *)bp->bio_data;
1111 idp->cyl = fdc->status[3];
1112 idp->head = fdc->status[4];
1113 idp->sec = fdc->status[5];
1114 idp->secshift = fdc->status[6];
1115 if (debugflags & 0x40)
1116 printf("c %d h %d s %d z %d\n",
1117 idp->cyl, idp->head, idp->sec, idp->secshift);
1118 break;
1119 case BIO_READ:
1120 case BIO_WRITE:
1121 bp->bio_pblkno += nsect;
1122 bp->bio_resid -= fd->fd_iosize;
1123 bp->bio_completed += fd->fd_iosize;
1124 fd->fd_ioptr += fd->fd_iosize;
1125 /* Since we managed to get something done, reset the retry */
1126 fdc->retry = 0;
1127 if (bp->bio_resid > 0)
1128 return (0);
1129 break;
1130 case BIO_FMT:
1131 break;
1132 }
1133 return (fdc_biodone(fdc, 0));
1134 }
1135
1136 static void
1137 fdc_thread(void *arg)
1138 {
1139 struct fdc_data *fdc;
1140
1141 fdc = arg;
1142 int i;
1143
1144 mtx_lock(&fdc->fdc_mtx);
1145 fdc->flags |= FDC_KTHREAD_ALIVE;
1146 while ((fdc->flags & FDC_KTHREAD_EXIT) == 0) {
1147 mtx_unlock(&fdc->fdc_mtx);
1148 i = fdc_worker(fdc);
1149 if (i && debugflags & 0x20) {
1150 if (fdc->bp != NULL) {
1151 g_print_bio(fdc->bp);
1152 printf("\n");
1153 }
1154 printf("Retry line %d\n", retry_line);
1155 }
1156 fdc->retry += i;
1157 mtx_lock(&fdc->fdc_mtx);
1158 }
1159 fdc->flags &= ~(FDC_KTHREAD_EXIT | FDC_KTHREAD_ALIVE);
1160 mtx_unlock(&fdc->fdc_mtx);
1161
1162 kproc_exit(0);
1163 }
1164
1165 /*
1166 * Enqueue a request.
1167 */
1168 static void
1169 fd_enqueue(struct fd_data *fd, struct bio *bp)
1170 {
1171 struct fdc_data *fdc;
1172 int call;
1173
1174 call = 0;
1175 fdc = fd->fdc;
1176 mtx_lock(&fdc->fdc_mtx);
1177 /* If we go from idle, cancel motor turnoff */
1178 if (fd->fd_iocount++ == 0)
1179 callout_stop(&fd->toffhandle);
1180 if (fd->flags & FD_MOTOR) {
1181 /* The motor is on, send it directly to the controller */
1182 bioq_disksort(&fdc->head, bp);
1183 wakeup(&fdc->head);
1184 } else {
1185 /* Queue it on the drive until the motor has started */
1186 bioq_insert_tail(&fd->fd_bq, bp);
1187 if (!(fd->flags & FD_MOTORWAIT))
1188 fd_motor(fd, 1);
1189 }
1190 mtx_unlock(&fdc->fdc_mtx);
1191 }
1192
1193 /*
1194 * Try to find out if we have a disk in the drive.
1195 */
1196 static int
1197 fd_probe_disk(struct fd_data *fd, int *recal)
1198 {
1199 struct fdc_data *fdc;
1200 int st0, st3, cyl;
1201 int oopts, ret;
1202
1203 fdc = fd->fdc;
1204 oopts = fd->options;
1205 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1206 ret = 1;
1207
1208 /*
1209 * First recal, then seek to cyl#1, this clears the old condition on
1210 * the disk change line so we can examine it for current status.
1211 */
1212 if (debugflags & 0x40)
1213 printf("New disk in probe\n");
1214 mtx_lock(&fdc->fdc_mtx);
1215 fd->flags |= FD_NEWDISK;
1216 mtx_unlock(&fdc->fdc_mtx);
1217 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
1218 goto done;
1219 tsleep(fdc, PRIBIO, "fdrecal", hz);
1220 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1221 goto done; /* XXX */
1222 if ((st0 & 0xc0) || cyl != 0)
1223 goto done;
1224
1225 /* Seek to track 1 */
1226 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, 1, 0))
1227 goto done;
1228 tsleep(fdc, PRIBIO, "fdseek", hz);
1229 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1230 goto done; /* XXX */
1231 *recal |= (1 << fd->fdsu);
1232 if (fdin_rd(fdc) & FDI_DCHG) {
1233 if (debugflags & 0x40)
1234 printf("Empty in probe\n");
1235 mtx_lock(&fdc->fdc_mtx);
1236 fd->flags |= FD_EMPTY;
1237 mtx_unlock(&fdc->fdc_mtx);
1238 } else {
1239 if (fdc_sense_drive(fdc, &st3) != 0)
1240 goto done;
1241 if (debugflags & 0x40)
1242 printf("Got disk in probe\n");
1243 mtx_lock(&fdc->fdc_mtx);
1244 fd->flags &= ~FD_EMPTY;
1245 if (st3 & NE7_ST3_WP)
1246 fd->flags |= FD_WP;
1247 else
1248 fd->flags &= ~FD_WP;
1249 mtx_unlock(&fdc->fdc_mtx);
1250 }
1251 ret = 0;
1252
1253 done:
1254 fd->options = oopts;
1255 return (ret);
1256 }
1257
1258 static int
1259 fdmisccmd(struct fd_data *fd, u_int cmd, void *data)
1260 {
1261 struct bio *bp;
1262 struct fd_formb *finfo;
1263 struct fdc_readid *idfield;
1264 int error;
1265
1266 bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO);
1267
1268 /*
1269 * Set up a bio request for fdstrategy(). bio_offset is faked
1270 * so that fdstrategy() will seek to the requested
1271 * cylinder, and use the desired head.
1272 */
1273 bp->bio_cmd = cmd;
1274 if (cmd == BIO_FMT) {
1275 finfo = (struct fd_formb *)data;
1276 bp->bio_pblkno =
1277 (finfo->cyl * fd->ft->heads + finfo->head) *
1278 fd->ft->sectrac;
1279 bp->bio_length = sizeof *finfo;
1280 } else if (cmd == BIO_RDID) {
1281 idfield = (struct fdc_readid *)data;
1282 bp->bio_pblkno =
1283 (idfield->cyl * fd->ft->heads + idfield->head) *
1284 fd->ft->sectrac;
1285 bp->bio_length = sizeof(struct fdc_readid);
1286 } else if (cmd == BIO_PROBE) {
1287 /* nothing */
1288 } else
1289 panic("wrong cmd in fdmisccmd()");
1290 bp->bio_offset = bp->bio_pblkno * fd->sectorsize;
1291 bp->bio_data = data;
1292 bp->bio_driver1 = fd;
1293 bp->bio_flags = 0;
1294
1295 fd_enqueue(fd, bp);
1296
1297 do {
1298 tsleep(bp, PRIBIO, "fdwait", hz);
1299 } while (!(bp->bio_flags & BIO_DONE));
1300 error = bp->bio_error;
1301
1302 free(bp, M_TEMP);
1303 return (error);
1304 }
1305
1306 /*
1307 * Try figuring out the density of the media present in our device.
1308 */
1309 static int
1310 fdautoselect(struct fd_data *fd)
1311 {
1312 struct fd_type *fdtp;
1313 struct fdc_readid id;
1314 int oopts, rv;
1315
1316 if (!(fd->ft->flags & FL_AUTO))
1317 return (0);
1318
1319 fdtp = fd_native_types[fd->type];
1320 fdsettype(fd, fdtp);
1321 if (!(fd->ft->flags & FL_AUTO))
1322 return (0);
1323
1324 /*
1325 * Try reading sector ID fields, first at cylinder 0, head 0,
1326 * then at cylinder 2, head N. We don't probe cylinder 1,
1327 * since for 5.25in DD media in a HD drive, there are no data
1328 * to read (2 step pulses per media cylinder required). For
1329 * two-sided media, the second probe always goes to head 1, so
1330 * we can tell them apart from single-sided media. As a
1331 * side-effect this means that single-sided media should be
1332 * mentioned in the search list after two-sided media of an
1333 * otherwise identical density. Media with a different number
1334 * of sectors per track but otherwise identical parameters
1335 * cannot be distinguished at all.
1336 *
1337 * If we successfully read an ID field on both cylinders where
1338 * the recorded values match our expectation, we are done.
1339 * Otherwise, we try the next density entry from the table.
1340 *
1341 * Stepping to cylinder 2 has the side-effect of clearing the
1342 * unit attention bit.
1343 */
1344 oopts = fd->options;
1345 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1346 for (; fdtp->heads; fdtp++) {
1347 fdsettype(fd, fdtp);
1348
1349 id.cyl = id.head = 0;
1350 rv = fdmisccmd(fd, BIO_RDID, &id);
1351 if (rv != 0)
1352 continue;
1353 if (id.cyl != 0 || id.head != 0 || id.secshift != fdtp->secsize)
1354 continue;
1355 id.cyl = 2;
1356 id.head = fd->ft->heads - 1;
1357 rv = fdmisccmd(fd, BIO_RDID, &id);
1358 if (id.cyl != 2 || id.head != fdtp->heads - 1 ||
1359 id.secshift != fdtp->secsize)
1360 continue;
1361 if (rv == 0)
1362 break;
1363 }
1364
1365 fd->options = oopts;
1366 if (fdtp->heads == 0) {
1367 if (debugflags & 0x40)
1368 device_printf(fd->dev, "autoselection failed\n");
1369 fdsettype(fd, fd_native_types[fd->type]);
1370 return (-1);
1371 } else {
1372 if (debugflags & 0x40) {
1373 device_printf(fd->dev,
1374 "autoselected %d KB medium\n", fd->ft->size / 2);
1375 fdprinttype(fd->ft);
1376 }
1377 return (0);
1378 }
1379 }
1380
1381 /*
1382 * GEOM class implementation
1383 */
1384
1385 static g_access_t fd_access;
1386 static g_start_t fd_start;
1387 static g_ioctl_t fd_ioctl;
1388
1389 struct g_class g_fd_class = {
1390 .name = "FD",
1391 .version = G_VERSION,
1392 .start = fd_start,
1393 .access = fd_access,
1394 .ioctl = fd_ioctl,
1395 };
1396
1397 static int
1398 fd_access(struct g_provider *pp, int r, int w, int e)
1399 {
1400 struct fd_data *fd;
1401 struct fdc_data *fdc;
1402 int ar, aw, ae;
1403 int busy;
1404
1405 fd = pp->geom->softc;
1406 fdc = fd->fdc;
1407
1408 /*
1409 * If our provider is withering, we can only get negative requests
1410 * and we don't want to even see them
1411 */
1412 if (pp->flags & G_PF_WITHER)
1413 return (0);
1414
1415 ar = r + pp->acr;
1416 aw = w + pp->acw;
1417 ae = e + pp->ace;
1418
1419 if (ar == 0 && aw == 0 && ae == 0) {
1420 device_unbusy(fd->dev);
1421 return (0);
1422 }
1423
1424 busy = 0;
1425 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) {
1426 if (fdmisccmd(fd, BIO_PROBE, NULL))
1427 return (ENXIO);
1428 if (fd->flags & FD_EMPTY)
1429 return (ENXIO);
1430 if (fd->flags & FD_NEWDISK) {
1431 if (fdautoselect(fd) != 0 &&
1432 (device_get_flags(fd->dev) & FD_NO_CHLINE)) {
1433 mtx_lock(&fdc->fdc_mtx);
1434 fd->flags |= FD_EMPTY;
1435 mtx_unlock(&fdc->fdc_mtx);
1436 return (ENXIO);
1437 }
1438 mtx_lock(&fdc->fdc_mtx);
1439 fd->flags &= ~FD_NEWDISK;
1440 mtx_unlock(&fdc->fdc_mtx);
1441 }
1442 device_busy(fd->dev);
1443 busy = 1;
1444 }
1445
1446 if (w > 0 && (fd->flags & FD_WP)) {
1447 if (busy)
1448 device_unbusy(fd->dev);
1449 return (EROFS);
1450 }
1451
1452 pp->sectorsize = fd->sectorsize;
1453 pp->stripesize = fd->ft->heads * fd->ft->sectrac * fd->sectorsize;
1454 pp->mediasize = pp->stripesize * fd->ft->tracks;
1455 return (0);
1456 }
1457
1458 static void
1459 fd_start(struct bio *bp)
1460 {
1461 struct fdc_data * fdc;
1462 struct fd_data * fd;
1463
1464 fd = bp->bio_to->geom->softc;
1465 fdc = fd->fdc;
1466 bp->bio_driver1 = fd;
1467 if (bp->bio_cmd & BIO_GETATTR) {
1468 if (g_handleattr_int(bp, "GEOM::fwsectors", fd->ft->sectrac))
1469 return;
1470 if (g_handleattr_int(bp, "GEOM::fwheads", fd->ft->heads))
1471 return;
1472 g_io_deliver(bp, ENOIOCTL);
1473 return;
1474 }
1475 if (!(bp->bio_cmd & (BIO_READ|BIO_WRITE))) {
1476 g_io_deliver(bp, EOPNOTSUPP);
1477 return;
1478 }
1479 bp->bio_pblkno = bp->bio_offset / fd->sectorsize;
1480 bp->bio_resid = bp->bio_length;
1481 fd_enqueue(fd, bp);
1482 return;
1483 }
1484
1485 static int
1486 fd_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td)
1487 {
1488 struct fd_data *fd;
1489 struct fdc_status *fsp;
1490 struct fdc_readid *rid;
1491 int error;
1492
1493 fd = pp->geom->softc;
1494
1495 switch (cmd) {
1496 case FD_GTYPE: /* get drive type */
1497 *(struct fd_type *)data = *fd->ft;
1498 return (0);
1499
1500 case FD_STYPE: /* set drive type */
1501 /*
1502 * Allow setting drive type temporarily iff
1503 * currently unset. Used for fdformat so any
1504 * user can set it, and then start formatting.
1505 */
1506 fd->fts = *(struct fd_type *)data;
1507 if (fd->fts.sectrac) {
1508 /* XXX: check for rubbish */
1509 fdsettype(fd, &fd->fts);
1510 } else {
1511 fdsettype(fd, fd_native_types[fd->type]);
1512 }
1513 if (debugflags & 0x40)
1514 fdprinttype(fd->ft);
1515 return (0);
1516
1517 case FD_GOPTS: /* get drive options */
1518 *(int *)data = fd->options;
1519 return (0);
1520
1521 case FD_SOPTS: /* set drive options */
1522 fd->options = *(int *)data;
1523 return (0);
1524
1525 case FD_CLRERR:
1526 error = priv_check(td, PRIV_DRIVER);
1527 if (error)
1528 return (error);
1529 fd->fdc->fdc_errs = 0;
1530 return (0);
1531
1532 case FD_GSTAT:
1533 fsp = (struct fdc_status *)data;
1534 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
1535 return (EINVAL);
1536 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
1537 return (0);
1538
1539 case FD_GDTYPE:
1540 *(enum fd_drivetype *)data = fd->type;
1541 return (0);
1542
1543 case FD_FORM:
1544 if (!(fflag & FWRITE))
1545 return (EPERM);
1546 if (((struct fd_formb *)data)->format_version !=
1547 FD_FORMAT_VERSION)
1548 return (EINVAL); /* wrong version of formatting prog */
1549 error = fdmisccmd(fd, BIO_FMT, data);
1550 mtx_lock(&fd->fdc->fdc_mtx);
1551 fd->flags |= FD_NEWDISK;
1552 mtx_unlock(&fd->fdc->fdc_mtx);
1553 break;
1554
1555 case FD_READID:
1556 rid = (struct fdc_readid *)data;
1557 if (rid->cyl > 85 || rid->head > 1)
1558 return (EINVAL);
1559 error = fdmisccmd(fd, BIO_RDID, data);
1560 break;
1561
1562 case FIONBIO:
1563 case FIOASYNC:
1564 /* For backwards compat with old fd*(8) tools */
1565 error = 0;
1566 break;
1567
1568 default:
1569 if (debugflags & 0x80)
1570 printf("Unknown ioctl %lx\n", cmd);
1571 error = ENOIOCTL;
1572 break;
1573 }
1574 return (error);
1575 };
1576
1577
1578
1579 /*
1580 * Configuration/initialization stuff, per controller.
1581 */
1582
1583 devclass_t fdc_devclass;
1584 static devclass_t fd_devclass;
1585
1586 struct fdc_ivars {
1587 int fdunit;
1588 int fdtype;
1589 };
1590
1591 void
1592 fdc_release_resources(struct fdc_data *fdc)
1593 {
1594 device_t dev;
1595 struct resource *last;
1596 int i;
1597
1598 dev = fdc->fdc_dev;
1599 if (fdc->fdc_intr)
1600 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1601 fdc->fdc_intr = NULL;
1602 if (fdc->res_irq != NULL)
1603 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
1604 fdc->res_irq);
1605 fdc->res_irq = NULL;
1606 last = NULL;
1607 for (i = 0; i < FDC_MAXREG; i++) {
1608 if (fdc->resio[i] != NULL && fdc->resio[i] != last) {
1609 bus_release_resource(dev, SYS_RES_IOPORT,
1610 fdc->ridio[i], fdc->resio[i]);
1611 last = fdc->resio[i];
1612 fdc->resio[i] = NULL;
1613 }
1614 }
1615 if (fdc->res_drq != NULL)
1616 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
1617 fdc->res_drq);
1618 fdc->res_drq = NULL;
1619 }
1620
1621 int
1622 fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
1623 {
1624 struct fdc_ivars *ivars = device_get_ivars(child);
1625
1626 switch (which) {
1627 case FDC_IVAR_FDUNIT:
1628 *result = ivars->fdunit;
1629 break;
1630 case FDC_IVAR_FDTYPE:
1631 *result = ivars->fdtype;
1632 break;
1633 default:
1634 return (ENOENT);
1635 }
1636 return (0);
1637 }
1638
1639 int
1640 fdc_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
1641 {
1642 struct fdc_ivars *ivars = device_get_ivars(child);
1643
1644 switch (which) {
1645 case FDC_IVAR_FDUNIT:
1646 ivars->fdunit = value;
1647 break;
1648 case FDC_IVAR_FDTYPE:
1649 ivars->fdtype = value;
1650 break;
1651 default:
1652 return (ENOENT);
1653 }
1654 return (0);
1655 }
1656
1657 int
1658 fdc_initial_reset(device_t dev, struct fdc_data *fdc)
1659 {
1660 int ic_type, part_id;
1661
1662 /*
1663 * A status value of 0xff is very unlikely, but not theoretically
1664 * impossible, but it is far more likely to indicate an empty bus.
1665 */
1666 if (fdsts_rd(fdc) == 0xff)
1667 return (ENXIO);
1668
1669 /*
1670 * Assert a reset to the floppy controller and check that the status
1671 * register goes to zero.
1672 */
1673 fdout_wr(fdc, 0);
1674 fdout_wr(fdc, 0);
1675 if (fdsts_rd(fdc) != 0)
1676 return (ENXIO);
1677
1678 /*
1679 * Clear the reset and see it come ready.
1680 */
1681 fdout_wr(fdc, FDO_FRST);
1682 DELAY(100);
1683 if (fdsts_rd(fdc) != 0x80)
1684 return (ENXIO);
1685
1686 /* Then, see if it can handle a command. */
1687 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, 0xaf, 0x1e, 0))
1688 return (ENXIO);
1689
1690 /*
1691 * Try to identify the chip.
1692 *
1693 * The i8272 datasheet documents that unknown commands
1694 * will return ST0 as 0x80. The i8272 is supposedly identical
1695 * to the NEC765.
1696 * The i82077SL datasheet says 0x90 for the VERSION command,
1697 * and several "superio" chips emulate this.
1698 */
1699 if (fdc_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type))
1700 return (ENXIO);
1701 if (fdc_cmd(fdc, 1, 0x18, 1, &part_id))
1702 return (ENXIO);
1703 if (bootverbose)
1704 device_printf(dev,
1705 "ic_type %02x part_id %02x\n", ic_type, part_id);
1706 switch (ic_type & 0xff) {
1707 case 0x80:
1708 device_set_desc(dev, "NEC 765 or clone");
1709 fdc->fdct = FDC_NE765;
1710 break;
1711 case 0x81:
1712 case 0x90:
1713 device_set_desc(dev,
1714 "Enhanced floppy controller");
1715 fdc->fdct = FDC_ENHANCED;
1716 break;
1717 default:
1718 device_set_desc(dev, "Generic floppy controller");
1719 fdc->fdct = FDC_UNKNOWN;
1720 break;
1721 }
1722 return (0);
1723 }
1724
1725 int
1726 fdc_detach(device_t dev)
1727 {
1728 struct fdc_data *fdc;
1729 int error;
1730
1731 fdc = device_get_softc(dev);
1732
1733 /* have our children detached first */
1734 if ((error = bus_generic_detach(dev)))
1735 return (error);
1736
1737 if (fdc->fdc_intr)
1738 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1739 fdc->fdc_intr = NULL;
1740
1741 /* kill worker thread */
1742 mtx_lock(&fdc->fdc_mtx);
1743 fdc->flags |= FDC_KTHREAD_EXIT;
1744 wakeup(&fdc->head);
1745 while ((fdc->flags & FDC_KTHREAD_ALIVE) != 0)
1746 msleep(fdc->fdc_thread, &fdc->fdc_mtx, PRIBIO, "fdcdet", 0);
1747 mtx_unlock(&fdc->fdc_mtx);
1748
1749 /* reset controller, turn motor off */
1750 fdout_wr(fdc, 0);
1751
1752 if (!(fdc->flags & FDC_NODMA))
1753 isa_dma_release(fdc->dmachan);
1754 fdc_release_resources(fdc);
1755 mtx_destroy(&fdc->fdc_mtx);
1756 return (0);
1757 }
1758
1759 /*
1760 * Add a child device to the fdc controller. It will then be probed etc.
1761 */
1762 device_t
1763 fdc_add_child(device_t dev, const char *name, int unit)
1764 {
1765 struct fdc_ivars *ivar;
1766 device_t child;
1767
1768 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO);
1769 if (ivar == NULL)
1770 return (NULL);
1771 child = device_add_child(dev, name, unit);
1772 if (child == NULL) {
1773 free(ivar, M_DEVBUF);
1774 return (NULL);
1775 }
1776 device_set_ivars(child, ivar);
1777 ivar->fdunit = unit;
1778 ivar->fdtype = FDT_NONE;
1779 if (resource_disabled(name, unit))
1780 device_disable(child);
1781 return (child);
1782 }
1783
1784 int
1785 fdc_attach(device_t dev)
1786 {
1787 struct fdc_data *fdc;
1788 int error;
1789
1790 fdc = device_get_softc(dev);
1791 fdc->fdc_dev = dev;
1792 error = fdc_initial_reset(dev, fdc);
1793 if (error) {
1794 device_printf(dev, "does not respond\n");
1795 return (error);
1796 }
1797 error = bus_setup_intr(dev, fdc->res_irq,
1798 INTR_TYPE_BIO | INTR_ENTROPY |
1799 ((fdc->flags & FDC_NOFAST) ? INTR_MPSAFE : 0),
1800 ((fdc->flags & FDC_NOFAST) ? NULL : fdc_intr_fast),
1801 ((fdc->flags & FDC_NOFAST) ? fdc_intr : NULL),
1802 fdc, &fdc->fdc_intr);
1803 if (error) {
1804 device_printf(dev, "cannot setup interrupt\n");
1805 return (error);
1806 }
1807 if (!(fdc->flags & FDC_NODMA)) {
1808 error = isa_dma_acquire(fdc->dmachan);
1809 if (!error) {
1810 error = isa_dma_init(fdc->dmachan,
1811 MAX_BYTES_PER_CYL, M_WAITOK);
1812 if (error)
1813 isa_dma_release(fdc->dmachan);
1814 }
1815 if (error)
1816 return (error);
1817 }
1818 fdc->fdcu = device_get_unit(dev);
1819 fdc->flags |= FDC_NEEDS_RESET;
1820
1821 mtx_init(&fdc->fdc_mtx, "fdc lock", NULL, MTX_DEF);
1822
1823 /* reset controller, turn motor off, clear fdout mirror reg */
1824 fdout_wr(fdc, fdc->fdout = 0);
1825 bioq_init(&fdc->head);
1826
1827 kproc_create(fdc_thread, fdc, &fdc->fdc_thread, 0, 0,
1828 "fdc%d", device_get_unit(dev));
1829
1830 settle = hz / 8;
1831
1832 return (0);
1833 }
1834
1835 int
1836 fdc_hints_probe(device_t dev)
1837 {
1838 const char *name, *dname;
1839 int i, error, dunit;
1840
1841 /*
1842 * Probe and attach any children. We should probably detect
1843 * devices from the BIOS unless overridden.
1844 */
1845 name = device_get_nameunit(dev);
1846 i = 0;
1847 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) {
1848 resource_int_value(dname, dunit, "drive", &dunit);
1849 fdc_add_child(dev, dname, dunit);
1850 }
1851
1852 if ((error = bus_generic_attach(dev)) != 0)
1853 return (error);
1854 return (0);
1855 }
1856
1857 int
1858 fdc_print_child(device_t me, device_t child)
1859 {
1860 int retval = 0, flags;
1861
1862 retval += bus_print_child_header(me, child);
1863 retval += printf(" on %s drive %d", device_get_nameunit(me),
1864 fdc_get_fdunit(child));
1865 if ((flags = device_get_flags(me)) != 0)
1866 retval += printf(" flags %#x", flags);
1867 retval += printf("\n");
1868
1869 return (retval);
1870 }
1871
1872 /*
1873 * Configuration/initialization, per drive.
1874 */
1875 static int
1876 fd_probe(device_t dev)
1877 {
1878 int i, unit;
1879 u_int st0, st3;
1880 struct fd_data *fd;
1881 struct fdc_data *fdc;
1882 int fdsu;
1883 int flags, type;
1884
1885 fdsu = fdc_get_fdunit(dev);
1886 fd = device_get_softc(dev);
1887 fdc = device_get_softc(device_get_parent(dev));
1888 flags = device_get_flags(dev);
1889
1890 fd->dev = dev;
1891 fd->fdc = fdc;
1892 fd->fdsu = fdsu;
1893 unit = device_get_unit(dev);
1894
1895 /* Auto-probe if fdinfo is present, but always allow override. */
1896 type = flags & FD_TYPEMASK;
1897 if (type == FDT_NONE && (type = fdc_get_fdtype(dev)) != FDT_NONE) {
1898 fd->type = type;
1899 goto done;
1900 } else {
1901 /* make sure fdautoselect() will be called */
1902 fd->flags = FD_EMPTY;
1903 fd->type = type;
1904 }
1905
1906 #if (defined(__i386__) && !defined(PC98)) || defined(__amd64__)
1907 if (fd->type == FDT_NONE && (unit == 0 || unit == 1)) {
1908 /* Look up what the BIOS thinks we have. */
1909 if (unit == 0)
1910 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4;
1911 else
1912 fd->type = rtcin(RTC_FDISKETTE) & 0x0f;
1913 if (fd->type == FDT_288M_1)
1914 fd->type = FDT_288M;
1915 }
1916 #endif /* __i386__ || __amd64__ */
1917 /* is there a unit? */
1918 if (fd->type == FDT_NONE)
1919 return (ENXIO);
1920
1921 /*
1922 mtx_lock(&fdc->fdc_mtx);
1923 */
1924 /* select it */
1925 fd_select(fd);
1926 fd_motor(fd, 1);
1927 fdc->fd = fd;
1928 fdc_reset(fdc); /* XXX reset, then unreset, etc. */
1929 DELAY(1000000); /* 1 sec */
1930
1931 if ((flags & FD_NO_PROBE) == 0) {
1932 /* If we're at track 0 first seek inwards. */
1933 if ((fdc_sense_drive(fdc, &st3) == 0) &&
1934 (st3 & NE7_ST3_T0)) {
1935 /* Seek some steps... */
1936 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
1937 /* ...wait a moment... */
1938 DELAY(300000);
1939 /* make ctrlr happy: */
1940 fdc_sense_int(fdc, NULL, NULL);
1941 }
1942 }
1943
1944 for (i = 0; i < 2; i++) {
1945 /*
1946 * we must recalibrate twice, just in case the
1947 * heads have been beyond cylinder 76, since
1948 * most FDCs still barf when attempting to
1949 * recalibrate more than 77 steps
1950 */
1951 /* go back to 0: */
1952 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
1953 /* a second being enough for full stroke seek*/
1954 DELAY(i == 0 ? 1000000 : 300000);
1955
1956 /* anything responding? */
1957 if (fdc_sense_int(fdc, &st0, NULL) == 0 &&
1958 (st0 & NE7_ST0_EC) == 0)
1959 break; /* already probed succesfully */
1960 }
1961 }
1962 }
1963
1964 fd_motor(fd, 0);
1965 fdc->fd = NULL;
1966 /*
1967 mtx_unlock(&fdc->fdc_mtx);
1968 */
1969
1970 if ((flags & FD_NO_PROBE) == 0 &&
1971 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */
1972 return (ENXIO);
1973
1974 done:
1975
1976 switch (fd->type) {
1977 case FDT_12M:
1978 device_set_desc(dev, "1200-KB 5.25\" drive");
1979 break;
1980 case FDT_144M:
1981 device_set_desc(dev, "1440-KB 3.5\" drive");
1982 break;
1983 case FDT_288M:
1984 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
1985 break;
1986 case FDT_360K:
1987 device_set_desc(dev, "360-KB 5.25\" drive");
1988 break;
1989 case FDT_720K:
1990 device_set_desc(dev, "720-KB 3.5\" drive");
1991 break;
1992 default:
1993 return (ENXIO);
1994 }
1995 fd->track = FD_NO_TRACK;
1996 fd->fdc = fdc;
1997 fd->fdsu = fdsu;
1998 fd->options = 0;
1999 callout_init_mtx(&fd->toffhandle, &fd->fdc->fdc_mtx, 0);
2000
2001 /* initialize densities for subdevices */
2002 fdsettype(fd, fd_native_types[fd->type]);
2003 return (0);
2004 }
2005
2006 /*
2007 * We have to do this in a geom event because GEOM is not running
2008 * when fd_attach() is.
2009 * XXX: move fd_attach after geom like ata/scsi disks
2010 */
2011 static void
2012 fd_attach2(void *arg, int flag)
2013 {
2014 struct fd_data *fd;
2015
2016 fd = arg;
2017
2018 fd->fd_geom = g_new_geomf(&g_fd_class,
2019 "fd%d", device_get_unit(fd->dev));
2020 fd->fd_provider = g_new_providerf(fd->fd_geom, fd->fd_geom->name);
2021 fd->fd_geom->softc = fd;
2022 g_error_provider(fd->fd_provider, 0);
2023 }
2024
2025 static int
2026 fd_attach(device_t dev)
2027 {
2028 struct fd_data *fd;
2029
2030 fd = device_get_softc(dev);
2031 g_post_event(fd_attach2, fd, M_WAITOK, NULL);
2032 fd->flags |= FD_EMPTY;
2033 bioq_init(&fd->fd_bq);
2034
2035 return (0);
2036 }
2037
2038 static void
2039 fd_detach_geom(void *arg, int flag)
2040 {
2041 struct fd_data *fd = arg;
2042
2043 g_topology_assert();
2044 g_wither_geom(fd->fd_geom, ENXIO);
2045 }
2046
2047 static int
2048 fd_detach(device_t dev)
2049 {
2050 struct fd_data *fd;
2051
2052 fd = device_get_softc(dev);
2053 g_waitfor_event(fd_detach_geom, fd, M_WAITOK, NULL);
2054 while (device_get_state(dev) == DS_BUSY)
2055 tsleep(fd, PZERO, "fdd", hz/10);
2056 callout_drain(&fd->toffhandle);
2057
2058 return (0);
2059 }
2060
2061 static device_method_t fd_methods[] = {
2062 /* Device interface */
2063 DEVMETHOD(device_probe, fd_probe),
2064 DEVMETHOD(device_attach, fd_attach),
2065 DEVMETHOD(device_detach, fd_detach),
2066 DEVMETHOD(device_shutdown, bus_generic_shutdown),
2067 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
2068 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
2069 { 0, 0 }
2070 };
2071
2072 static driver_t fd_driver = {
2073 "fd",
2074 fd_methods,
2075 sizeof(struct fd_data)
2076 };
2077
2078 static int
2079 fdc_modevent(module_t mod, int type, void *data)
2080 {
2081
2082 return (g_modevent(NULL, type, &g_fd_class));
2083 }
2084
2085 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, fdc_modevent, 0);
Cache object: e69b17a719583e82126ea2f6a9fdd8c1
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