FreeBSD/Linux Kernel Cross Reference
sys/dev/fdc/fdc.c
1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2004 Poul-Henning Kamp
5 * Copyright (c) 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Don Ahn.
10 *
11 * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu)
12 * aided by the Linux floppy driver modifications from David Bateman
13 * (dbateman@eng.uts.edu.au).
14 *
15 * Copyright (c) 1993, 1994 by
16 * jc@irbs.UUCP (John Capo)
17 * vak@zebub.msk.su (Serge Vakulenko)
18 * ache@astral.msk.su (Andrew A. Chernov)
19 *
20 * Copyright (c) 1993, 1994, 1995 by
21 * joerg_wunsch@uriah.sax.de (Joerg Wunsch)
22 * dufault@hda.com (Peter Dufault)
23 *
24 * Copyright (c) 2001 Joerg Wunsch,
25 * joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
26 *
27 * Redistribution and use in source and binary forms, with or without
28 * modification, are permitted provided that the following conditions
29 * are met:
30 * 1. Redistributions of source code must retain the above copyright
31 * notice, this list of conditions and the following disclaimer.
32 * 2. Redistributions in binary form must reproduce the above copyright
33 * notice, this list of conditions and the following disclaimer in the
34 * documentation and/or other materials provided with the distribution.
35 * 3. Neither the name of the University nor the names of its contributors
36 * may be used to endorse or promote products derived from this software
37 * without specific prior written permission.
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
40 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
42 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
43 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
44 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
45 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
47 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
48 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
49 * SUCH DAMAGE.
50 *
51 * from: @(#)fd.c 7.4 (Berkeley) 5/25/91
52 *
53 */
54
55 #include <sys/cdefs.h>
56 __FBSDID("$FreeBSD$");
57
58 #include "opt_fdc.h"
59
60 #include <sys/param.h>
61 #include <sys/bio.h>
62 #include <sys/bus.h>
63 #include <sys/devicestat.h>
64 #include <sys/disk.h>
65 #include <sys/fcntl.h>
66 #include <sys/fdcio.h>
67 #include <sys/filio.h>
68 #include <sys/kernel.h>
69 #include <sys/kthread.h>
70 #include <sys/lock.h>
71 #include <sys/malloc.h>
72 #include <sys/module.h>
73 #include <sys/mutex.h>
74 #include <sys/priv.h>
75 #include <sys/proc.h>
76 #include <sys/rman.h>
77 #include <sys/sysctl.h>
78 #include <sys/systm.h>
79
80 #include <geom/geom.h>
81
82 #include <machine/bus.h>
83 #include <machine/clock.h>
84 #include <machine/stdarg.h>
85
86 #include <isa/isavar.h>
87 #include <isa/isareg.h>
88 #include <isa/rtc.h>
89 #include <dev/fdc/fdcvar.h>
90
91 #include <dev/ic/nec765.h>
92
93 /*
94 * Runtime configuration hints/flags
95 */
96
97 /* configuration flags for fd */
98 #define FD_TYPEMASK 0x0f /* drive type, matches enum
99 * fd_drivetype; on i386 machines, if
100 * given as 0, use RTC type for fd0
101 * and fd1 */
102 #define FD_NO_CHLINE 0x10 /* drive does not support changeline
103 * aka. unit attention */
104 #define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just
105 * assume it is there */
106
107 /*
108 * Things that could conceiveably considered parameters or tweakables
109 */
110
111 /*
112 * Maximal number of bytes in a cylinder.
113 * This is used for ISADMA bouncebuffer allocation and sets the max
114 * xfersize we support.
115 *
116 * 2.88M format has 2 x 36 x 512, allow for hacked up density.
117 */
118 #define MAX_BYTES_PER_CYL (2 * 40 * 512)
119
120 /*
121 * Timeout value for the PIO loops to wait until the FDC main status
122 * register matches our expectations (request for master, direction
123 * bit). This is supposed to be a number of microseconds, although
124 * timing might actually not be very accurate.
125 *
126 * Timeouts of 100 msec are believed to be required for some broken
127 * (old) hardware.
128 */
129 #define FDSTS_TIMEOUT 100000
130
131 /*
132 * After this many errors, stop whining. Close will reset this count.
133 */
134 #define FDC_ERRMAX 100
135
136 /*
137 * AutoDensity search lists for each drive type.
138 */
139
140 static struct fd_type fd_searchlist_360k[] = {
141 { FDF_5_360 },
142 { 0 }
143 };
144
145 static struct fd_type fd_searchlist_12m[] = {
146 { FDF_5_1200 | FL_AUTO },
147 { FDF_5_400 | FL_AUTO },
148 { FDF_5_360 | FL_2STEP | FL_AUTO},
149 { 0 }
150 };
151
152 static struct fd_type fd_searchlist_720k[] = {
153 { FDF_3_720 },
154 { 0 }
155 };
156
157 static struct fd_type fd_searchlist_144m[] = {
158 { FDF_3_1440 | FL_AUTO},
159 { FDF_3_720 | FL_AUTO},
160 { 0 }
161 };
162
163 static struct fd_type fd_searchlist_288m[] = {
164 { FDF_3_1440 | FL_AUTO },
165 #if 0
166 { FDF_3_2880 | FL_AUTO }, /* XXX: probably doesn't work */
167 #endif
168 { FDF_3_720 | FL_AUTO},
169 { 0 }
170 };
171
172 /*
173 * Order must match enum fd_drivetype in <sys/fdcio.h>.
174 */
175 static struct fd_type *fd_native_types[] = {
176 NULL, /* FDT_NONE */
177 fd_searchlist_360k, /* FDT_360K */
178 fd_searchlist_12m, /* FDT_12M */
179 fd_searchlist_720k, /* FDT_720K */
180 fd_searchlist_144m, /* FDT_144M */
181 fd_searchlist_288m, /* FDT_288M_1 (mapped to FDT_288M) */
182 fd_searchlist_288m, /* FDT_288M */
183 };
184
185 /*
186 * Internals start here
187 */
188
189 /* registers */
190 #define FDOUT 2 /* Digital Output Register (W) */
191 #define FDO_FDSEL 0x03 /* floppy device select */
192 #define FDO_FRST 0x04 /* floppy controller reset */
193 #define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */
194 #define FDO_MOEN0 0x10 /* motor enable drive 0 */
195 #define FDO_MOEN1 0x20 /* motor enable drive 1 */
196 #define FDO_MOEN2 0x40 /* motor enable drive 2 */
197 #define FDO_MOEN3 0x80 /* motor enable drive 3 */
198
199 #define FDSTS 4 /* NEC 765 Main Status Register (R) */
200 #define FDDSR 4 /* Data Rate Select Register (W) */
201 #define FDDATA 5 /* NEC 765 Data Register (R/W) */
202 #define FDCTL 7 /* Control Register (W) */
203
204 /*
205 * The YE-DATA PC Card floppies use PIO to read in the data rather
206 * than DMA due to the wild variability of DMA for the PC Card
207 * devices. DMA was deleted from the PC Card specification in version
208 * 7.2 of the standard, but that post-dates the YE-DATA devices by many
209 * years.
210 *
211 * In addition, if we cannot setup the DMA resources for the ISA
212 * attachment, we'll use this same offset for data transfer. However,
213 * that almost certainly won't work.
214 *
215 * For this mode, offset 0 and 1 must be used to setup the transfer
216 * for this floppy. This is OK for PC Card YE Data devices, but for
217 * ISA this is likely wrong. These registers are only available on
218 * those systems that map them to the floppy drive. Newer systems do
219 * not do this, and we should likely prohibit access to them (or
220 * disallow NODMA to be set).
221 */
222 #define FDBCDR 0 /* And 1 */
223 #define FD_YE_DATAPORT 6 /* Drive Data port */
224
225 #define FDI_DCHG 0x80 /* diskette has been changed */
226 /* requires drive and motor being selected */
227 /* is cleared by any step pulse to drive */
228
229 /*
230 * We have three private BIO commands.
231 */
232 #define BIO_PROBE BIO_CMD0
233 #define BIO_RDID BIO_CMD1
234 #define BIO_FMT BIO_CMD2
235
236 /*
237 * Per drive structure (softc).
238 */
239 struct fd_data {
240 u_char *fd_ioptr; /* IO pointer */
241 u_int fd_iosize; /* Size of IO chunks */
242 u_int fd_iocount; /* Outstanding requests */
243 struct fdc_data *fdc; /* pointer to controller structure */
244 int fdsu; /* this units number on this controller */
245 enum fd_drivetype type; /* drive type */
246 struct fd_type *ft; /* pointer to current type descriptor */
247 struct fd_type fts; /* type descriptors */
248 int sectorsize;
249 int flags;
250 #define FD_WP (1<<0) /* Write protected */
251 #define FD_MOTOR (1<<1) /* motor should be on */
252 #define FD_MOTORWAIT (1<<2) /* motor should be on */
253 #define FD_EMPTY (1<<3) /* no media */
254 #define FD_NEWDISK (1<<4) /* media changed */
255 #define FD_ISADMA (1<<5) /* isa dma started */
256 int track; /* where we think the head is */
257 #define FD_NO_TRACK -2
258 int options; /* FDOPT_* */
259 struct callout toffhandle;
260 struct g_geom *fd_geom;
261 struct g_provider *fd_provider;
262 device_t dev;
263 struct bio_queue_head fd_bq;
264 bool gone;
265 };
266
267 #define FD_NOT_VALID -2
268
269 static driver_intr_t fdc_intr;
270 static driver_filter_t fdc_intr_fast;
271 static void fdc_reset(struct fdc_data *);
272 static int fd_probe_disk(struct fd_data *, int *);
273
274 static SYSCTL_NODE(_debug, OID_AUTO, fdc, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
275 "fdc driver");
276
277 static int fifo_threshold = 8;
278 SYSCTL_INT(_debug_fdc, OID_AUTO, fifo, CTLFLAG_RW, &fifo_threshold, 0,
279 "FIFO threshold setting");
280
281 static int debugflags = 0;
282 SYSCTL_INT(_debug_fdc, OID_AUTO, debugflags, CTLFLAG_RW, &debugflags, 0,
283 "Debug flags");
284
285 static int retries = 10;
286 SYSCTL_INT(_debug_fdc, OID_AUTO, retries, CTLFLAG_RW, &retries, 0,
287 "Number of retries to attempt");
288
289 static int spec1 = NE7_SPEC_1(6, 240);
290 SYSCTL_INT(_debug_fdc, OID_AUTO, spec1, CTLFLAG_RW, &spec1, 0,
291 "Specification byte one (step-rate + head unload)");
292
293 static int spec2 = NE7_SPEC_2(16, 0);
294 SYSCTL_INT(_debug_fdc, OID_AUTO, spec2, CTLFLAG_RW, &spec2, 0,
295 "Specification byte two (head load time + no-dma)");
296
297 static int settle;
298 SYSCTL_INT(_debug_fdc, OID_AUTO, settle, CTLFLAG_RW, &settle, 0,
299 "Head settling time in sec/hz");
300
301 static void
302 fdprinttype(struct fd_type *ft)
303 {
304
305 printf("(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,0x%x)",
306 ft->sectrac, ft->secsize, ft->datalen, ft->gap, ft->tracks,
307 ft->size, ft->trans, ft->heads, ft->f_gap, ft->f_inter,
308 ft->offset_side2, ft->flags);
309 }
310
311 static void
312 fdsettype(struct fd_data *fd, struct fd_type *ft)
313 {
314 fd->ft = ft;
315 ft->size = ft->sectrac * ft->heads * ft->tracks;
316 fd->sectorsize = 128 << fd->ft->secsize;
317 }
318
319 /*
320 * Bus space handling (access to low-level IO).
321 */
322 static inline void
323 fdregwr(struct fdc_data *fdc, int reg, uint8_t v)
324 {
325
326 bus_space_write_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg], v);
327 }
328
329 static inline uint8_t
330 fdregrd(struct fdc_data *fdc, int reg)
331 {
332
333 return bus_space_read_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg]);
334 }
335
336 static void
337 fdctl_wr(struct fdc_data *fdc, u_int8_t v)
338 {
339
340 fdregwr(fdc, FDCTL, v);
341 }
342
343 static void
344 fdout_wr(struct fdc_data *fdc, u_int8_t v)
345 {
346
347 fdregwr(fdc, FDOUT, v);
348 }
349
350 static u_int8_t
351 fdsts_rd(struct fdc_data *fdc)
352 {
353
354 return fdregrd(fdc, FDSTS);
355 }
356
357 static void
358 fddsr_wr(struct fdc_data *fdc, u_int8_t v)
359 {
360
361 fdregwr(fdc, FDDSR, v);
362 }
363
364 static void
365 fddata_wr(struct fdc_data *fdc, u_int8_t v)
366 {
367
368 fdregwr(fdc, FDDATA, v);
369 }
370
371 static u_int8_t
372 fddata_rd(struct fdc_data *fdc)
373 {
374
375 return fdregrd(fdc, FDDATA);
376 }
377
378 static u_int8_t
379 fdin_rd(struct fdc_data *fdc)
380 {
381
382 return fdregrd(fdc, FDCTL);
383 }
384
385 /*
386 * Magic pseudo-DMA initialization for YE FDC. Sets count and
387 * direction.
388 */
389 static void
390 fdbcdr_wr(struct fdc_data *fdc, int iswrite, uint16_t count)
391 {
392 fdregwr(fdc, FDBCDR, (count - 1) & 0xff);
393 fdregwr(fdc, FDBCDR + 1,
394 (iswrite ? 0x80 : 0) | (((count - 1) >> 8) & 0x7f));
395 }
396
397 static int
398 fdc_err(struct fdc_data *fdc, const char *s)
399 {
400 fdc->fdc_errs++;
401 if (s) {
402 if (fdc->fdc_errs < FDC_ERRMAX)
403 device_printf(fdc->fdc_dev, "%s", s);
404 else if (fdc->fdc_errs == FDC_ERRMAX)
405 device_printf(fdc->fdc_dev, "too many errors, not "
406 "logging any more\n");
407 }
408
409 return (1);
410 }
411
412 /*
413 * FDC IO functions, take care of the main status register, timeout
414 * in case the desired status bits are never set.
415 *
416 * These PIO loops initially start out with short delays between
417 * each iteration in the expectation that the required condition
418 * is usually met quickly, so it can be handled immediately.
419 */
420 static int
421 fdc_in(struct fdc_data *fdc, int *ptr)
422 {
423 int i, j, step;
424
425 step = 1;
426 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
427 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
428 if (i == (NE7_DIO|NE7_RQM)) {
429 i = fddata_rd(fdc);
430 if (ptr)
431 *ptr = i;
432 return (0);
433 }
434 if (i == NE7_RQM)
435 return (fdc_err(fdc, "ready for output in input\n"));
436 step += step;
437 DELAY(step);
438 }
439 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
440 }
441
442 static int
443 fdc_out(struct fdc_data *fdc, int x)
444 {
445 int i, j, step;
446
447 step = 1;
448 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
449 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
450 if (i == NE7_RQM) {
451 fddata_wr(fdc, x);
452 return (0);
453 }
454 if (i == (NE7_DIO|NE7_RQM))
455 return (fdc_err(fdc, "ready for input in output\n"));
456 step += step;
457 DELAY(step);
458 }
459 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
460 }
461
462 /*
463 * fdc_cmd: Send a command to the chip.
464 * Takes a varargs with this structure:
465 * # of output bytes
466 * output bytes as int [...]
467 * # of input bytes
468 * input bytes as int* [...]
469 */
470 static int
471 fdc_cmd(struct fdc_data *fdc, int n_out, ...)
472 {
473 u_char cmd = 0;
474 int n_in;
475 int n, i;
476 va_list ap;
477
478 va_start(ap, n_out);
479 for (n = 0; n < n_out; n++) {
480 i = va_arg(ap, int);
481 if (n == 0)
482 cmd = i;
483 if (fdc_out(fdc, i) < 0) {
484 char msg[50];
485 snprintf(msg, sizeof(msg),
486 "cmd %x failed at out byte %d of %d\n",
487 cmd, n + 1, n_out);
488 fdc->flags |= FDC_NEEDS_RESET;
489 va_end(ap);
490 return fdc_err(fdc, msg);
491 }
492 }
493 n_in = va_arg(ap, int);
494 for (n = 0; n < n_in; n++) {
495 int *ptr = va_arg(ap, int *);
496 if (fdc_in(fdc, ptr) != 0) {
497 char msg[50];
498 snprintf(msg, sizeof(msg),
499 "cmd %02x failed at in byte %d of %d\n",
500 cmd, n + 1, n_in);
501 fdc->flags |= FDC_NEEDS_RESET;
502 va_end(ap);
503 return fdc_err(fdc, msg);
504 }
505 }
506 va_end(ap);
507 return (0);
508 }
509
510 static void
511 fdc_reset(struct fdc_data *fdc)
512 {
513 int i, r[10];
514
515 if (fdc->fdct == FDC_ENHANCED) {
516 /* Try a software reset, default precomp, and 500 kb/s */
517 fddsr_wr(fdc, I8207X_DSR_SR);
518 } else {
519 /* Try a hardware reset, keep motor on */
520 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
521 DELAY(100);
522 /* enable FDC, but defer interrupts a moment */
523 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
524 }
525 DELAY(100);
526 fdout_wr(fdc, fdc->fdout);
527
528 /* XXX after a reset, silently believe the FDC will accept commands */
529 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, spec1, spec2, 0))
530 device_printf(fdc->fdc_dev, " SPECIFY failed in reset\n");
531
532 if (fdc->fdct == FDC_ENHANCED) {
533 if (fdc_cmd(fdc, 4,
534 I8207X_CONFIG,
535 0,
536 /* 0x40 | */ /* Enable Implied Seek -
537 * breaks 2step! */
538 0x10 | /* Polling disabled */
539 (fifo_threshold - 1), /* Fifo threshold */
540 0x00, /* Precomp track */
541 0))
542 device_printf(fdc->fdc_dev,
543 " CONFIGURE failed in reset\n");
544 if (debugflags & 1) {
545 if (fdc_cmd(fdc, 1,
546 I8207X_DUMPREG,
547 10, &r[0], &r[1], &r[2], &r[3], &r[4],
548 &r[5], &r[6], &r[7], &r[8], &r[9]))
549 device_printf(fdc->fdc_dev,
550 " DUMPREG failed in reset\n");
551 for (i = 0; i < 10; i++)
552 printf(" %02x", r[i]);
553 printf("\n");
554 }
555 }
556 }
557
558 static int
559 fdc_sense_drive(struct fdc_data *fdc, int *st3p)
560 {
561 int st3;
562
563 if (fdc_cmd(fdc, 2, NE7CMD_SENSED, fdc->fd->fdsu, 1, &st3))
564 return (fdc_err(fdc, "Sense Drive Status failed\n"));
565 if (st3p)
566 *st3p = st3;
567 return (0);
568 }
569
570 static int
571 fdc_sense_int(struct fdc_data *fdc, int *st0p, int *cylp)
572 {
573 int cyl, st0, ret;
574
575 ret = fdc_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
576 if (ret) {
577 (void)fdc_err(fdc, "sense intr err reading stat reg 0\n");
578 return (ret);
579 }
580
581 if (st0p)
582 *st0p = st0;
583
584 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
585 /*
586 * There doesn't seem to have been an interrupt.
587 */
588 return (FD_NOT_VALID);
589 }
590
591 if (fdc_in(fdc, &cyl) != 0)
592 return fdc_err(fdc, "can't get cyl num\n");
593
594 if (cylp)
595 *cylp = cyl;
596
597 return (0);
598 }
599
600 static int
601 fdc_read_status(struct fdc_data *fdc)
602 {
603 int i, ret, status;
604
605 for (i = ret = 0; i < 7; i++) {
606 ret = fdc_in(fdc, &status);
607 fdc->status[i] = status;
608 if (ret != 0)
609 break;
610 }
611
612 if (ret == 0)
613 fdc->flags |= FDC_STAT_VALID;
614 else
615 fdc->flags &= ~FDC_STAT_VALID;
616
617 return ret;
618 }
619
620 /*
621 * Select this drive
622 */
623 static void
624 fd_select(struct fd_data *fd)
625 {
626 struct fdc_data *fdc;
627
628 /* XXX: lock controller */
629 fdc = fd->fdc;
630 fdc->fdout &= ~FDO_FDSEL;
631 fdc->fdout |= FDO_FDMAEN | FDO_FRST | fd->fdsu;
632 fdout_wr(fdc, fdc->fdout);
633 }
634
635 static void
636 fd_turnon(void *arg)
637 {
638 struct fd_data *fd;
639 struct bio *bp;
640 int once;
641
642 fd = arg;
643 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
644 fd->flags &= ~FD_MOTORWAIT;
645 fd->flags |= FD_MOTOR;
646 once = 0;
647 for (;;) {
648 bp = bioq_takefirst(&fd->fd_bq);
649 if (bp == NULL)
650 break;
651 bioq_disksort(&fd->fdc->head, bp);
652 once = 1;
653 }
654 if (once)
655 wakeup(&fd->fdc->head);
656 }
657
658 static void
659 fd_motor(struct fd_data *fd, int turnon)
660 {
661 struct fdc_data *fdc;
662
663 fdc = fd->fdc;
664 /*
665 mtx_assert(&fdc->fdc_mtx, MA_OWNED);
666 */
667 if (turnon) {
668 fd->flags |= FD_MOTORWAIT;
669 fdc->fdout |= (FDO_MOEN0 << fd->fdsu);
670 callout_reset(&fd->toffhandle, hz, fd_turnon, fd);
671 } else {
672 callout_stop(&fd->toffhandle);
673 fd->flags &= ~(FD_MOTOR|FD_MOTORWAIT);
674 fdc->fdout &= ~(FDO_MOEN0 << fd->fdsu);
675 }
676 fdout_wr(fdc, fdc->fdout);
677 }
678
679 static void
680 fd_turnoff(void *xfd)
681 {
682 struct fd_data *fd = xfd;
683
684 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
685 fd_motor(fd, 0);
686 }
687
688 /*
689 * fdc_intr - wake up the worker thread.
690 */
691
692 static void
693 fdc_intr(void *arg)
694 {
695
696 wakeup(arg);
697 }
698
699 static int
700 fdc_intr_fast(void *arg)
701 {
702
703 wakeup(arg);
704 return(FILTER_HANDLED);
705 }
706
707 /*
708 * fdc_pio(): perform programmed IO read/write for YE PCMCIA floppy.
709 */
710 static void
711 fdc_pio(struct fdc_data *fdc)
712 {
713 u_char *cptr;
714 struct bio *bp;
715 u_int count;
716
717 bp = fdc->bp;
718 cptr = fdc->fd->fd_ioptr;
719 count = fdc->fd->fd_iosize;
720
721 if (bp->bio_cmd == BIO_READ) {
722 fdbcdr_wr(fdc, 0, count);
723 bus_space_read_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
724 fdc->ioff[FD_YE_DATAPORT], cptr, count);
725 } else {
726 bus_space_write_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
727 fdc->ioff[FD_YE_DATAPORT], cptr, count);
728 fdbcdr_wr(fdc, 0, count); /* needed? */
729 }
730 }
731
732 static int
733 fdc_biodone(struct fdc_data *fdc, int error)
734 {
735 struct fd_data *fd;
736 struct bio *bp;
737
738 fd = fdc->fd;
739 bp = fdc->bp;
740
741 mtx_lock(&fdc->fdc_mtx);
742 if (--fd->fd_iocount == 0)
743 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
744 fdc->bp = NULL;
745 fdc->fd = NULL;
746 mtx_unlock(&fdc->fdc_mtx);
747 if (bp->bio_to != NULL) {
748 if ((debugflags & 2) && fd->fdc->retry > 0)
749 printf("retries: %d\n", fd->fdc->retry);
750 g_io_deliver(bp, error);
751 return (0);
752 }
753 bp->bio_error = error;
754 bp->bio_flags |= BIO_DONE;
755 wakeup(bp);
756 return (0);
757 }
758
759 static int retry_line;
760
761 static int
762 fdc_worker(struct fdc_data *fdc)
763 {
764 struct fd_data *fd;
765 struct bio *bp;
766 int i, nsect;
767 int st0, st3, cyl, mfm, steptrac, cylinder, descyl, sec;
768 int head;
769 int override_error;
770 static int need_recal;
771 struct fdc_readid *idp;
772 struct fd_formb *finfo;
773
774 override_error = 0;
775
776 /* Have we exhausted our retries ? */
777 bp = fdc->bp;
778 fd = fdc->fd;
779 if (bp != NULL &&
780 (fdc->retry >= retries || (fd->options & FDOPT_NORETRY))) {
781 if ((debugflags & 4))
782 printf("Too many retries (EIO)\n");
783 if (fdc->flags & FDC_NEEDS_RESET) {
784 mtx_lock(&fdc->fdc_mtx);
785 fd->flags |= FD_EMPTY;
786 mtx_unlock(&fdc->fdc_mtx);
787 }
788 return (fdc_biodone(fdc, EIO));
789 }
790
791 /* Disable ISADMA if we bailed while it was active */
792 if (fd != NULL && (fd->flags & FD_ISADMA)) {
793 isa_dmadone(
794 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
795 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
796 mtx_lock(&fdc->fdc_mtx);
797 fd->flags &= ~FD_ISADMA;
798 mtx_unlock(&fdc->fdc_mtx);
799 }
800
801 /* Unwedge the controller ? */
802 if (fdc->flags & FDC_NEEDS_RESET) {
803 fdc->flags &= ~FDC_NEEDS_RESET;
804 fdc_reset(fdc);
805 if (cold)
806 DELAY(1000000);
807 else
808 tsleep(fdc, PRIBIO, "fdcrst", hz);
809 /* Discard results */
810 for (i = 0; i < 4; i++)
811 fdc_sense_int(fdc, &st0, &cyl);
812 /* All drives must recal */
813 need_recal = 0xf;
814 }
815
816 /* Pick up a request, if need be wait for it */
817 if (fdc->bp == NULL) {
818 mtx_lock(&fdc->fdc_mtx);
819 do {
820 fdc->bp = bioq_takefirst(&fdc->head);
821 if (fdc->bp == NULL)
822 msleep(&fdc->head, &fdc->fdc_mtx,
823 PRIBIO, "-", 0);
824 } while (fdc->bp == NULL &&
825 (fdc->flags & FDC_KTHREAD_EXIT) == 0);
826 mtx_unlock(&fdc->fdc_mtx);
827
828 if (fdc->bp == NULL)
829 /*
830 * Nothing to do, worker thread has been
831 * requested to stop.
832 */
833 return (0);
834
835 bp = fdc->bp;
836 fd = fdc->fd = bp->bio_driver1;
837 fdc->retry = 0;
838 fd->fd_ioptr = bp->bio_data;
839 if (bp->bio_cmd == BIO_FMT) {
840 i = offsetof(struct fd_formb, fd_formb_cylno(0));
841 fd->fd_ioptr += i;
842 fd->fd_iosize = bp->bio_length - i;
843 }
844 }
845
846 /* Select drive, setup params */
847 fd_select(fd);
848 if (fdc->fdct == FDC_ENHANCED)
849 fddsr_wr(fdc, fd->ft->trans);
850 else
851 fdctl_wr(fdc, fd->ft->trans);
852
853 if (bp->bio_cmd == BIO_PROBE) {
854 if ((!(device_get_flags(fd->dev) & FD_NO_CHLINE) &&
855 !(fdin_rd(fdc) & FDI_DCHG) &&
856 !(fd->flags & FD_EMPTY)) ||
857 fd_probe_disk(fd, &need_recal) == 0)
858 return (fdc_biodone(fdc, 0));
859 return (1);
860 }
861
862 /*
863 * If we are dead just flush the requests
864 */
865 if (fd->flags & FD_EMPTY)
866 return (fdc_biodone(fdc, ENXIO));
867
868 /* Check if we lost our media */
869 if (fdin_rd(fdc) & FDI_DCHG) {
870 if (debugflags & 0x40)
871 printf("Lost disk\n");
872 mtx_lock(&fdc->fdc_mtx);
873 fd->flags |= FD_EMPTY;
874 fd->flags |= FD_NEWDISK;
875 mtx_unlock(&fdc->fdc_mtx);
876 g_topology_lock();
877 g_orphan_provider(fd->fd_provider, ENXIO);
878 fd->fd_provider->flags |= G_PF_WITHER;
879 fd->fd_provider =
880 g_new_providerf(fd->fd_geom, "%s", fd->fd_geom->name);
881 g_error_provider(fd->fd_provider, 0);
882 g_topology_unlock();
883 return (fdc_biodone(fdc, ENXIO));
884 }
885
886 /* Check if the floppy is write-protected */
887 if (bp->bio_cmd == BIO_FMT || bp->bio_cmd == BIO_WRITE) {
888 retry_line = __LINE__;
889 if(fdc_sense_drive(fdc, &st3) != 0)
890 return (1);
891 if(st3 & NE7_ST3_WP)
892 return (fdc_biodone(fdc, EROFS));
893 }
894
895 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0;
896 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1;
897 i = fd->ft->sectrac * fd->ft->heads;
898 cylinder = bp->bio_pblkno / i;
899 descyl = cylinder * steptrac;
900 sec = bp->bio_pblkno % i;
901 nsect = i - sec;
902 head = sec / fd->ft->sectrac;
903 sec = sec % fd->ft->sectrac + 1;
904
905 /* If everything is going swimmingly, use multisector xfer */
906 if (fdc->retry == 0 &&
907 (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE)) {
908 fd->fd_iosize = imin(nsect * fd->sectorsize, bp->bio_resid);
909 nsect = fd->fd_iosize / fd->sectorsize;
910 } else if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) {
911 fd->fd_iosize = fd->sectorsize;
912 nsect = 1;
913 }
914
915 /* Do RECAL if we need to or are going to track zero anyway */
916 if ((need_recal & (1 << fd->fdsu)) ||
917 (cylinder == 0 && fd->track != 0) ||
918 fdc->retry > 2) {
919 retry_line = __LINE__;
920 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
921 return (1);
922 tsleep(fdc, PRIBIO, "fdrecal", hz);
923 retry_line = __LINE__;
924 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
925 return (1); /* XXX */
926 retry_line = __LINE__;
927 if ((st0 & 0xc0) || cyl != 0)
928 return (1);
929 need_recal &= ~(1 << fd->fdsu);
930 fd->track = 0;
931 /* let the heads settle */
932 if (settle)
933 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
934 }
935
936 /*
937 * SEEK to where we want to be
938 */
939 if (cylinder != fd->track) {
940 retry_line = __LINE__;
941 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, descyl, 0))
942 return (1);
943 tsleep(fdc, PRIBIO, "fdseek", hz);
944 retry_line = __LINE__;
945 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
946 return (1); /* XXX */
947 retry_line = __LINE__;
948 if ((st0 & 0xc0) || cyl != descyl) {
949 need_recal |= (1 << fd->fdsu);
950 return (1);
951 }
952 /* let the heads settle */
953 if (settle)
954 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
955 }
956 fd->track = cylinder;
957
958 if (debugflags & 8)
959 printf("op %x bn %ju siz %u ptr %p retry %d\n",
960 bp->bio_cmd, bp->bio_pblkno, fd->fd_iosize,
961 fd->fd_ioptr, fdc->retry);
962
963 /* Setup ISADMA if we need it and have it */
964 if ((bp->bio_cmd == BIO_READ ||
965 bp->bio_cmd == BIO_WRITE ||
966 bp->bio_cmd == BIO_FMT)
967 && !(fdc->flags & FDC_NODMA)) {
968 isa_dmastart(
969 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
970 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
971 mtx_lock(&fdc->fdc_mtx);
972 fd->flags |= FD_ISADMA;
973 mtx_unlock(&fdc->fdc_mtx);
974 }
975
976 /* Do PIO if we have to */
977 if (fdc->flags & FDC_NODMA) {
978 if (bp->bio_cmd == BIO_READ ||
979 bp->bio_cmd == BIO_WRITE ||
980 bp->bio_cmd == BIO_FMT)
981 fdbcdr_wr(fdc, 1, fd->fd_iosize);
982 if (bp->bio_cmd == BIO_WRITE ||
983 bp->bio_cmd == BIO_FMT)
984 fdc_pio(fdc);
985 }
986
987 switch(bp->bio_cmd) {
988 case BIO_FMT:
989 /* formatting */
990 finfo = (struct fd_formb *)bp->bio_data;
991 retry_line = __LINE__;
992 if (fdc_cmd(fdc, 6,
993 NE7CMD_FORMAT | mfm,
994 head << 2 | fd->fdsu,
995 finfo->fd_formb_secshift,
996 finfo->fd_formb_nsecs,
997 finfo->fd_formb_gaplen,
998 finfo->fd_formb_fillbyte, 0))
999 return (1);
1000 break;
1001 case BIO_RDID:
1002 retry_line = __LINE__;
1003 if (fdc_cmd(fdc, 2,
1004 NE7CMD_READID | mfm,
1005 head << 2 | fd->fdsu, 0))
1006 return (1);
1007 break;
1008 case BIO_READ:
1009 retry_line = __LINE__;
1010 if (fdc_cmd(fdc, 9,
1011 NE7CMD_READ | NE7CMD_SK | mfm | NE7CMD_MT,
1012 head << 2 | fd->fdsu, /* head & unit */
1013 fd->track, /* track */
1014 head, /* head */
1015 sec, /* sector + 1 */
1016 fd->ft->secsize, /* sector size */
1017 fd->ft->sectrac, /* sectors/track */
1018 fd->ft->gap, /* gap size */
1019 fd->ft->datalen, /* data length */
1020 0))
1021 return (1);
1022 break;
1023 case BIO_WRITE:
1024 retry_line = __LINE__;
1025 if (fdc_cmd(fdc, 9,
1026 NE7CMD_WRITE | mfm | NE7CMD_MT,
1027 head << 2 | fd->fdsu, /* head & unit */
1028 fd->track, /* track */
1029 head, /* head */
1030 sec, /* sector + 1 */
1031 fd->ft->secsize, /* sector size */
1032 fd->ft->sectrac, /* sectors/track */
1033 fd->ft->gap, /* gap size */
1034 fd->ft->datalen, /* data length */
1035 0))
1036 return (1);
1037 break;
1038 default:
1039 KASSERT(0 == 1, ("Wrong bio_cmd %x\n", bp->bio_cmd));
1040 }
1041
1042 /* Wait for interrupt */
1043 i = tsleep(fdc, PRIBIO, "fddata", hz);
1044
1045 /* PIO if the read looks good */
1046 if (i == 0 && (fdc->flags & FDC_NODMA) && (bp->bio_cmd == BIO_READ))
1047 fdc_pio(fdc);
1048
1049 /* Finish DMA */
1050 if (fd->flags & FD_ISADMA) {
1051 isa_dmadone(
1052 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
1053 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
1054 mtx_lock(&fdc->fdc_mtx);
1055 fd->flags &= ~FD_ISADMA;
1056 mtx_unlock(&fdc->fdc_mtx);
1057 }
1058
1059 if (i != 0) {
1060 /*
1061 * Timeout.
1062 *
1063 * Due to IBM's brain-dead design, the FDC has a faked ready
1064 * signal, hardwired to ready == true. Thus, any command
1065 * issued if there's no diskette in the drive will _never_
1066 * complete, and must be aborted by resetting the FDC.
1067 * Many thanks, Big Blue!
1068 */
1069 retry_line = __LINE__;
1070 fdc->flags |= FDC_NEEDS_RESET;
1071 return (1);
1072 }
1073
1074 retry_line = __LINE__;
1075 if (fdc_read_status(fdc))
1076 return (1);
1077
1078 if (debugflags & 0x10)
1079 printf(" -> %x %x %x %x\n",
1080 fdc->status[0], fdc->status[1],
1081 fdc->status[2], fdc->status[3]);
1082
1083 st0 = fdc->status[0] & NE7_ST0_IC;
1084 if (st0 != 0) {
1085 retry_line = __LINE__;
1086 if (st0 == NE7_ST0_IC_AT && fdc->status[1] & NE7_ST1_OR) {
1087 /*
1088 * DMA overrun. Someone hogged the bus and
1089 * didn't release it in time for the next
1090 * FDC transfer.
1091 */
1092 return (1);
1093 }
1094 retry_line = __LINE__;
1095 if(st0 == NE7_ST0_IC_IV) {
1096 fdc->flags |= FDC_NEEDS_RESET;
1097 return (1);
1098 }
1099 retry_line = __LINE__;
1100 if(st0 == NE7_ST0_IC_AT && fdc->status[2] & NE7_ST2_WC) {
1101 need_recal |= (1 << fd->fdsu);
1102 return (1);
1103 }
1104 if (debugflags & 0x20) {
1105 printf("status %02x %02x %02x %02x %02x %02x\n",
1106 fdc->status[0], fdc->status[1], fdc->status[2],
1107 fdc->status[3], fdc->status[4], fdc->status[5]);
1108 }
1109 retry_line = __LINE__;
1110 if (fd->options & FDOPT_NOERROR)
1111 override_error = 1;
1112 else
1113 return (1);
1114 }
1115 /* All OK */
1116 switch(bp->bio_cmd) {
1117 case BIO_RDID:
1118 /* copy out ID field contents */
1119 idp = (struct fdc_readid *)bp->bio_data;
1120 idp->cyl = fdc->status[3];
1121 idp->head = fdc->status[4];
1122 idp->sec = fdc->status[5];
1123 idp->secshift = fdc->status[6];
1124 if (debugflags & 0x40)
1125 printf("c %d h %d s %d z %d\n",
1126 idp->cyl, idp->head, idp->sec, idp->secshift);
1127 break;
1128 case BIO_READ:
1129 case BIO_WRITE:
1130 bp->bio_pblkno += nsect;
1131 bp->bio_resid -= fd->fd_iosize;
1132 bp->bio_completed += fd->fd_iosize;
1133 fd->fd_ioptr += fd->fd_iosize;
1134 if (override_error) {
1135 if ((debugflags & 4))
1136 printf("FDOPT_NOERROR: returning bad data\n");
1137 } else {
1138 /* Since we managed to get something done,
1139 * reset the retry */
1140 fdc->retry = 0;
1141 if (bp->bio_resid > 0)
1142 return (0);
1143 }
1144 break;
1145 case BIO_FMT:
1146 break;
1147 }
1148 return (fdc_biodone(fdc, 0));
1149 }
1150
1151 static void
1152 fdc_thread(void *arg)
1153 {
1154 struct fdc_data *fdc;
1155
1156 fdc = arg;
1157 int i;
1158
1159 mtx_lock(&fdc->fdc_mtx);
1160 fdc->flags |= FDC_KTHREAD_ALIVE;
1161 while ((fdc->flags & FDC_KTHREAD_EXIT) == 0) {
1162 mtx_unlock(&fdc->fdc_mtx);
1163 i = fdc_worker(fdc);
1164 if (i && debugflags & 0x20) {
1165 if (fdc->bp != NULL)
1166 g_print_bio("", fdc->bp, "");
1167 printf("Retry line %d\n", retry_line);
1168 }
1169 fdc->retry += i;
1170 mtx_lock(&fdc->fdc_mtx);
1171 }
1172 fdc->flags &= ~(FDC_KTHREAD_EXIT | FDC_KTHREAD_ALIVE);
1173 mtx_unlock(&fdc->fdc_mtx);
1174
1175 kproc_exit(0);
1176 }
1177
1178 /*
1179 * Enqueue a request.
1180 */
1181 static void
1182 fd_enqueue(struct fd_data *fd, struct bio *bp)
1183 {
1184 struct fdc_data *fdc;
1185
1186 fdc = fd->fdc;
1187 mtx_lock(&fdc->fdc_mtx);
1188 /* If we go from idle, cancel motor turnoff */
1189 if (fd->fd_iocount++ == 0)
1190 callout_stop(&fd->toffhandle);
1191 if (fd->flags & FD_MOTOR) {
1192 /* The motor is on, send it directly to the controller */
1193 bioq_disksort(&fdc->head, bp);
1194 wakeup(&fdc->head);
1195 } else {
1196 /* Queue it on the drive until the motor has started */
1197 bioq_insert_tail(&fd->fd_bq, bp);
1198 if (!(fd->flags & FD_MOTORWAIT))
1199 fd_motor(fd, 1);
1200 }
1201 mtx_unlock(&fdc->fdc_mtx);
1202 }
1203
1204 /*
1205 * Try to find out if we have a disk in the drive.
1206 */
1207 static int
1208 fd_probe_disk(struct fd_data *fd, int *recal)
1209 {
1210 struct fdc_data *fdc;
1211 int st0, st3, cyl;
1212 int oopts, ret;
1213
1214 fdc = fd->fdc;
1215 oopts = fd->options;
1216 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1217 ret = 1;
1218
1219 /*
1220 * First recal, then seek to cyl#1, this clears the old condition on
1221 * the disk change line so we can examine it for current status.
1222 */
1223 if (debugflags & 0x40)
1224 printf("New disk in probe\n");
1225 mtx_lock(&fdc->fdc_mtx);
1226 fd->flags |= FD_NEWDISK;
1227 mtx_unlock(&fdc->fdc_mtx);
1228 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
1229 goto done;
1230 tsleep(fdc, PRIBIO, "fdrecal", hz);
1231 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1232 goto done; /* XXX */
1233 if ((st0 & 0xc0) || cyl != 0)
1234 goto done;
1235
1236 /* Seek to track 1 */
1237 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, 1, 0))
1238 goto done;
1239 tsleep(fdc, PRIBIO, "fdseek", hz);
1240 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1241 goto done; /* XXX */
1242 *recal |= (1 << fd->fdsu);
1243 if (fdin_rd(fdc) & FDI_DCHG) {
1244 if (debugflags & 0x40)
1245 printf("Empty in probe\n");
1246 mtx_lock(&fdc->fdc_mtx);
1247 fd->flags |= FD_EMPTY;
1248 mtx_unlock(&fdc->fdc_mtx);
1249 } else {
1250 if (fdc_sense_drive(fdc, &st3) != 0)
1251 goto done;
1252 if (debugflags & 0x40)
1253 printf("Got disk in probe\n");
1254 mtx_lock(&fdc->fdc_mtx);
1255 fd->flags &= ~FD_EMPTY;
1256 if (st3 & NE7_ST3_WP)
1257 fd->flags |= FD_WP;
1258 else
1259 fd->flags &= ~FD_WP;
1260 mtx_unlock(&fdc->fdc_mtx);
1261 }
1262 ret = 0;
1263
1264 done:
1265 fd->options = oopts;
1266 return (ret);
1267 }
1268
1269 static int
1270 fdmisccmd(struct fd_data *fd, u_int cmd, void *data)
1271 {
1272 struct bio *bp;
1273 struct fd_formb *finfo;
1274 struct fdc_readid *idfield;
1275 int error;
1276
1277 bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO);
1278
1279 /*
1280 * Set up a bio request for fdstrategy(). bio_offset is faked
1281 * so that fdstrategy() will seek to the requested
1282 * cylinder, and use the desired head.
1283 */
1284 bp->bio_cmd = cmd;
1285 if (cmd == BIO_FMT) {
1286 finfo = (struct fd_formb *)data;
1287 bp->bio_pblkno =
1288 (finfo->cyl * fd->ft->heads + finfo->head) *
1289 fd->ft->sectrac;
1290 bp->bio_length = sizeof *finfo;
1291 } else if (cmd == BIO_RDID) {
1292 idfield = (struct fdc_readid *)data;
1293 bp->bio_pblkno =
1294 (idfield->cyl * fd->ft->heads + idfield->head) *
1295 fd->ft->sectrac;
1296 bp->bio_length = sizeof(struct fdc_readid);
1297 } else if (cmd == BIO_PROBE) {
1298 /* nothing */
1299 } else
1300 panic("wrong cmd in fdmisccmd()");
1301 bp->bio_offset = bp->bio_pblkno * fd->sectorsize;
1302 bp->bio_data = data;
1303 bp->bio_driver1 = fd;
1304 bp->bio_flags = 0;
1305
1306 fd_enqueue(fd, bp);
1307
1308 do {
1309 tsleep(bp, PRIBIO, "fdwait", hz);
1310 } while (!(bp->bio_flags & BIO_DONE));
1311 error = bp->bio_error;
1312
1313 free(bp, M_TEMP);
1314 return (error);
1315 }
1316
1317 /*
1318 * Try figuring out the density of the media present in our device.
1319 */
1320 static int
1321 fdautoselect(struct fd_data *fd)
1322 {
1323 struct fd_type *fdtp;
1324 struct fdc_readid id;
1325 int oopts, rv;
1326
1327 if (!(fd->ft->flags & FL_AUTO))
1328 return (0);
1329
1330 fdtp = fd_native_types[fd->type];
1331 fdsettype(fd, fdtp);
1332 if (!(fd->ft->flags & FL_AUTO))
1333 return (0);
1334
1335 /*
1336 * Try reading sector ID fields, first at cylinder 0, head 0,
1337 * then at cylinder 2, head N. We don't probe cylinder 1,
1338 * since for 5.25in DD media in a HD drive, there are no data
1339 * to read (2 step pulses per media cylinder required). For
1340 * two-sided media, the second probe always goes to head 1, so
1341 * we can tell them apart from single-sided media. As a
1342 * side-effect this means that single-sided media should be
1343 * mentioned in the search list after two-sided media of an
1344 * otherwise identical density. Media with a different number
1345 * of sectors per track but otherwise identical parameters
1346 * cannot be distinguished at all.
1347 *
1348 * If we successfully read an ID field on both cylinders where
1349 * the recorded values match our expectation, we are done.
1350 * Otherwise, we try the next density entry from the table.
1351 *
1352 * Stepping to cylinder 2 has the side-effect of clearing the
1353 * unit attention bit.
1354 */
1355 oopts = fd->options;
1356 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1357 for (; fdtp->heads; fdtp++) {
1358 fdsettype(fd, fdtp);
1359
1360 id.cyl = id.head = 0;
1361 rv = fdmisccmd(fd, BIO_RDID, &id);
1362 if (rv != 0)
1363 continue;
1364 if (id.cyl != 0 || id.head != 0 || id.secshift != fdtp->secsize)
1365 continue;
1366 id.cyl = 2;
1367 id.head = fd->ft->heads - 1;
1368 rv = fdmisccmd(fd, BIO_RDID, &id);
1369 if (id.cyl != 2 || id.head != fdtp->heads - 1 ||
1370 id.secshift != fdtp->secsize)
1371 continue;
1372 if (rv == 0)
1373 break;
1374 }
1375
1376 fd->options = oopts;
1377 if (fdtp->heads == 0) {
1378 if (debugflags & 0x40)
1379 device_printf(fd->dev, "autoselection failed\n");
1380 fdsettype(fd, fd_native_types[fd->type]);
1381 return (-1);
1382 } else {
1383 if (debugflags & 0x40) {
1384 device_printf(fd->dev,
1385 "autoselected %d KB medium\n",
1386 fd->ft->size / 2);
1387 fdprinttype(fd->ft);
1388 }
1389 return (0);
1390 }
1391 }
1392
1393 /*
1394 * GEOM class implementation
1395 */
1396
1397 static g_access_t fd_access;
1398 static g_start_t fd_start;
1399 static g_ioctl_t fd_ioctl;
1400 static g_provgone_t fd_providergone;
1401
1402 struct g_class g_fd_class = {
1403 .name = "FD",
1404 .version = G_VERSION,
1405 .start = fd_start,
1406 .access = fd_access,
1407 .ioctl = fd_ioctl,
1408 .providergone = fd_providergone,
1409 };
1410
1411 static int
1412 fd_access(struct g_provider *pp, int r, int w, int e)
1413 {
1414 struct fd_data *fd;
1415 struct fdc_data *fdc;
1416 int ar, aw, ae;
1417
1418 fd = pp->geom->softc;
1419 fdc = fd->fdc;
1420
1421 /*
1422 * If our provider is withering, we can only get negative requests
1423 * and we don't want to even see them
1424 */
1425 if (pp->flags & G_PF_WITHER)
1426 return (0);
1427
1428 ar = r + pp->acr;
1429 aw = w + pp->acw;
1430 ae = e + pp->ace;
1431
1432 if (ar == 0 && aw == 0 && ae == 0) {
1433 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR);
1434 return (0);
1435 }
1436
1437 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) {
1438 if (fdmisccmd(fd, BIO_PROBE, NULL))
1439 return (ENXIO);
1440 if (fd->flags & FD_EMPTY)
1441 return (ENXIO);
1442 if (fd->flags & FD_NEWDISK) {
1443 if (fdautoselect(fd) != 0 &&
1444 (device_get_flags(fd->dev) & FD_NO_CHLINE)) {
1445 mtx_lock(&fdc->fdc_mtx);
1446 fd->flags |= FD_EMPTY;
1447 mtx_unlock(&fdc->fdc_mtx);
1448 return (ENXIO);
1449 }
1450 mtx_lock(&fdc->fdc_mtx);
1451 fd->flags &= ~FD_NEWDISK;
1452 mtx_unlock(&fdc->fdc_mtx);
1453 }
1454 }
1455
1456 if (w > 0 && (fd->flags & FD_WP)) {
1457 return (EROFS);
1458 }
1459
1460 pp->sectorsize = fd->sectorsize;
1461 pp->stripesize = fd->ft->heads * fd->ft->sectrac * fd->sectorsize;
1462 pp->mediasize = pp->stripesize * fd->ft->tracks;
1463 return (0);
1464 }
1465
1466 static void
1467 fd_start(struct bio *bp)
1468 {
1469 struct fd_data * fd;
1470
1471 fd = bp->bio_to->geom->softc;
1472 bp->bio_driver1 = fd;
1473 if (bp->bio_cmd == BIO_GETATTR) {
1474 if (g_handleattr_int(bp, "GEOM::fwsectors", fd->ft->sectrac))
1475 return;
1476 if (g_handleattr_int(bp, "GEOM::fwheads", fd->ft->heads))
1477 return;
1478 g_io_deliver(bp, ENOIOCTL);
1479 return;
1480 }
1481 if (!(bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE)) {
1482 g_io_deliver(bp, EOPNOTSUPP);
1483 return;
1484 }
1485 bp->bio_pblkno = bp->bio_offset / fd->sectorsize;
1486 bp->bio_resid = bp->bio_length;
1487 fd_enqueue(fd, bp);
1488 return;
1489 }
1490
1491 static int
1492 fd_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td)
1493 {
1494 struct fd_data *fd;
1495 struct fdc_status *fsp;
1496 struct fdc_readid *rid;
1497 int error;
1498
1499 fd = pp->geom->softc;
1500
1501 switch (cmd) {
1502 case FD_GTYPE: /* get drive type */
1503 *(struct fd_type *)data = *fd->ft;
1504 return (0);
1505
1506 case FD_STYPE: /* set drive type */
1507 /*
1508 * Allow setting drive type temporarily iff
1509 * currently unset. Used for fdformat so any
1510 * user can set it, and then start formatting.
1511 */
1512 fd->fts = *(struct fd_type *)data;
1513 if (fd->fts.sectrac) {
1514 /* XXX: check for rubbish */
1515 fdsettype(fd, &fd->fts);
1516 } else {
1517 fdsettype(fd, fd_native_types[fd->type]);
1518 }
1519 if (debugflags & 0x40)
1520 fdprinttype(fd->ft);
1521 return (0);
1522
1523 case FD_GOPTS: /* get drive options */
1524 *(int *)data = fd->options;
1525 return (0);
1526
1527 case FD_SOPTS: /* set drive options */
1528 fd->options = *(int *)data;
1529 return (0);
1530
1531 case FD_CLRERR:
1532 error = priv_check(td, PRIV_DRIVER);
1533 if (error)
1534 return (error);
1535 fd->fdc->fdc_errs = 0;
1536 return (0);
1537
1538 case FD_GSTAT:
1539 fsp = (struct fdc_status *)data;
1540 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
1541 return (EINVAL);
1542 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
1543 return (0);
1544
1545 case FD_GDTYPE:
1546 *(enum fd_drivetype *)data = fd->type;
1547 return (0);
1548
1549 case FD_FORM:
1550 if (!(fflag & FWRITE))
1551 return (EPERM);
1552 if (((struct fd_formb *)data)->format_version !=
1553 FD_FORMAT_VERSION)
1554 return (EINVAL); /* wrong version of formatting prog */
1555 error = fdmisccmd(fd, BIO_FMT, data);
1556 mtx_lock(&fd->fdc->fdc_mtx);
1557 fd->flags |= FD_NEWDISK;
1558 mtx_unlock(&fd->fdc->fdc_mtx);
1559 break;
1560
1561 case FD_READID:
1562 rid = (struct fdc_readid *)data;
1563 if (rid->cyl > 85 || rid->head > 1)
1564 return (EINVAL);
1565 error = fdmisccmd(fd, BIO_RDID, data);
1566 break;
1567
1568 case FIONBIO:
1569 case FIOASYNC:
1570 /* For backwards compat with old fd*(8) tools */
1571 error = 0;
1572 break;
1573
1574 default:
1575 if (debugflags & 0x80)
1576 printf("Unknown ioctl %lx\n", cmd);
1577 error = ENOIOCTL;
1578 break;
1579 }
1580 return (error);
1581 };
1582
1583 /*
1584 * Configuration/initialization stuff, per controller.
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, NE7_SPEC_1(6, 240),
1688 NE7_SPEC_2(31, 0), 0))
1689 return (ENXIO);
1690
1691 /*
1692 * Try to identify the chip.
1693 *
1694 * The i8272 datasheet documents that unknown commands
1695 * will return ST0 as 0x80. The i8272 is supposedly identical
1696 * to the NEC765.
1697 * The i82077SL datasheet says 0x90 for the VERSION command,
1698 * and several "superio" chips emulate this.
1699 */
1700 if (fdc_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type))
1701 return (ENXIO);
1702 if (fdc_cmd(fdc, 1, 0x18, 1, &part_id))
1703 return (ENXIO);
1704 if (bootverbose)
1705 device_printf(dev,
1706 "ic_type %02x part_id %02x\n", ic_type, part_id);
1707 switch (ic_type & 0xff) {
1708 case 0x80:
1709 device_set_desc(dev, "NEC 765 or clone");
1710 fdc->fdct = FDC_NE765;
1711 break;
1712 case 0x81:
1713 case 0x90:
1714 device_set_desc(dev,
1715 "Enhanced floppy controller");
1716 fdc->fdct = FDC_ENHANCED;
1717 break;
1718 default:
1719 device_set_desc(dev, "Generic floppy controller");
1720 fdc->fdct = FDC_UNKNOWN;
1721 break;
1722 }
1723 return (0);
1724 }
1725
1726 int
1727 fdc_detach(device_t dev)
1728 {
1729 struct fdc_data *fdc;
1730 int error;
1731
1732 fdc = device_get_softc(dev);
1733
1734 /* have our children detached first */
1735 if ((error = bus_generic_detach(dev)))
1736 return (error);
1737
1738 if (fdc->fdc_intr)
1739 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1740 fdc->fdc_intr = NULL;
1741
1742 /* kill worker thread */
1743 mtx_lock(&fdc->fdc_mtx);
1744 fdc->flags |= FDC_KTHREAD_EXIT;
1745 wakeup(&fdc->head);
1746 while ((fdc->flags & FDC_KTHREAD_ALIVE) != 0)
1747 msleep(fdc->fdc_thread, &fdc->fdc_mtx, PRIBIO, "fdcdet", 0);
1748 mtx_unlock(&fdc->fdc_mtx);
1749
1750 /* reset controller, turn motor off */
1751 fdout_wr(fdc, 0);
1752
1753 if (!(fdc->flags & FDC_NODMA))
1754 isa_dma_release(fdc->dmachan);
1755 fdc_release_resources(fdc);
1756 mtx_destroy(&fdc->fdc_mtx);
1757 return (0);
1758 }
1759
1760 /*
1761 * Add a child device to the fdc controller. It will then be probed etc.
1762 */
1763 device_t
1764 fdc_add_child(device_t dev, const char *name, int unit)
1765 {
1766 struct fdc_ivars *ivar;
1767 device_t child;
1768
1769 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO);
1770 if (ivar == NULL)
1771 return (NULL);
1772 child = device_add_child(dev, name, unit);
1773 if (child == NULL) {
1774 free(ivar, M_DEVBUF);
1775 return (NULL);
1776 }
1777 device_set_ivars(child, ivar);
1778 ivar->fdunit = unit;
1779 ivar->fdtype = FDT_NONE;
1780 if (resource_disabled(name, unit))
1781 device_disable(child);
1782 return (child);
1783 }
1784
1785 int
1786 fdc_attach(device_t dev)
1787 {
1788 struct fdc_data *fdc;
1789 int error;
1790
1791 fdc = device_get_softc(dev);
1792 fdc->fdc_dev = dev;
1793 error = fdc_initial_reset(dev, fdc);
1794 if (error) {
1795 device_printf(dev, "does not respond\n");
1796 return (error);
1797 }
1798 error = bus_setup_intr(dev, fdc->res_irq,
1799 INTR_TYPE_BIO | INTR_ENTROPY |
1800 ((fdc->flags & FDC_NOFAST) ? INTR_MPSAFE : 0),
1801 ((fdc->flags & FDC_NOFAST) ? NULL : fdc_intr_fast),
1802 ((fdc->flags & FDC_NOFAST) ? fdc_intr : NULL),
1803 fdc, &fdc->fdc_intr);
1804 if (error) {
1805 device_printf(dev, "cannot setup interrupt\n");
1806 return (error);
1807 }
1808 if (!(fdc->flags & FDC_NODMA)) {
1809 error = isa_dma_acquire(fdc->dmachan);
1810 if (!error) {
1811 error = isa_dma_init(fdc->dmachan,
1812 MAX_BYTES_PER_CYL, M_WAITOK);
1813 if (error)
1814 isa_dma_release(fdc->dmachan);
1815 }
1816 if (error)
1817 return (error);
1818 }
1819 fdc->fdcu = device_get_unit(dev);
1820 fdc->flags |= FDC_NEEDS_RESET;
1821
1822 mtx_init(&fdc->fdc_mtx, "fdc lock", NULL, MTX_DEF);
1823
1824 /* reset controller, turn motor off, clear fdout mirror reg */
1825 fdout_wr(fdc, fdc->fdout = 0);
1826 bioq_init(&fdc->head);
1827
1828 settle = hz / 8;
1829
1830 return (0);
1831 }
1832
1833 void
1834 fdc_start_worker(device_t dev)
1835 {
1836 struct fdc_data *fdc;
1837
1838 fdc = device_get_softc(dev);
1839 kproc_create(fdc_thread, fdc, &fdc->fdc_thread, 0, 0,
1840 "fdc%d", device_get_unit(dev));
1841 }
1842
1843 int
1844 fdc_hints_probe(device_t dev)
1845 {
1846 const char *name, *dname;
1847 int i, error, dunit;
1848
1849 /*
1850 * Probe and attach any children. We should probably detect
1851 * devices from the BIOS unless overridden.
1852 */
1853 name = device_get_nameunit(dev);
1854 i = 0;
1855 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) {
1856 resource_int_value(dname, dunit, "drive", &dunit);
1857 fdc_add_child(dev, dname, dunit);
1858 }
1859
1860 if ((error = bus_generic_attach(dev)) != 0)
1861 return (error);
1862 return (0);
1863 }
1864
1865 int
1866 fdc_print_child(device_t me, device_t child)
1867 {
1868 int retval = 0, flags;
1869
1870 retval += bus_print_child_header(me, child);
1871 retval += printf(" on %s drive %d", device_get_nameunit(me),
1872 fdc_get_fdunit(child));
1873 if ((flags = device_get_flags(me)) != 0)
1874 retval += printf(" flags %#x", flags);
1875 retval += printf("\n");
1876
1877 return (retval);
1878 }
1879
1880 /*
1881 * Configuration/initialization, per drive.
1882 */
1883 static int
1884 fd_probe(device_t dev)
1885 {
1886 #if defined(__i386__) || defined(__amd64__)
1887 int unit;
1888 #endif
1889 int i;
1890 u_int st0, st3;
1891 struct fd_data *fd;
1892 struct fdc_data *fdc;
1893 int fdsu;
1894 int flags, type;
1895
1896 fdsu = fdc_get_fdunit(dev);
1897 fd = device_get_softc(dev);
1898 fdc = device_get_softc(device_get_parent(dev));
1899 flags = device_get_flags(dev);
1900
1901 fd->dev = dev;
1902 fd->fdc = fdc;
1903 fd->fdsu = fdsu;
1904
1905 /* Auto-probe if fdinfo is present, but always allow override. */
1906 type = flags & FD_TYPEMASK;
1907 if (type == FDT_NONE && (type = fdc_get_fdtype(dev)) != FDT_NONE) {
1908 fd->type = type;
1909 goto done;
1910 } else {
1911 /* make sure fdautoselect() will be called */
1912 fd->flags = FD_EMPTY;
1913 fd->type = type;
1914 }
1915
1916 #if defined(__i386__) || defined(__amd64__)
1917 unit = device_get_unit(dev);
1918 if (fd->type == FDT_NONE && (unit == 0 || unit == 1)) {
1919 /* Look up what the BIOS thinks we have. */
1920 if (unit == 0)
1921 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4;
1922 else
1923 fd->type = rtcin(RTC_FDISKETTE) & 0x0f;
1924 if (fd->type == FDT_288M_1)
1925 fd->type = FDT_288M;
1926 }
1927 #endif /* __i386__ || __amd64__ */
1928 /* is there a unit? */
1929 if (fd->type == FDT_NONE)
1930 return (ENXIO);
1931
1932 mtx_lock(&fdc->fdc_mtx);
1933
1934 /* select it */
1935 fd_select(fd);
1936 fd_motor(fd, 1);
1937 fdc->fd = fd;
1938 fdc_reset(fdc); /* XXX reset, then unreset, etc. */
1939 DELAY(1000000); /* 1 sec */
1940
1941 if ((flags & FD_NO_PROBE) == 0) {
1942 /* If we're at track 0 first seek inwards. */
1943 if ((fdc_sense_drive(fdc, &st3) == 0) &&
1944 (st3 & NE7_ST3_T0)) {
1945 /* Seek some steps... */
1946 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
1947 /* ...wait a moment... */
1948 DELAY(300000);
1949 /* make ctrlr happy: */
1950 fdc_sense_int(fdc, NULL, NULL);
1951 }
1952 }
1953
1954 for (i = 0; i < 2; i++) {
1955 /*
1956 * we must recalibrate twice, just in case the
1957 * heads have been beyond cylinder 76, since
1958 * most FDCs still barf when attempting to
1959 * recalibrate more than 77 steps
1960 */
1961 /* go back to 0: */
1962 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
1963 /* a second being enough for full stroke seek*/
1964 DELAY(i == 0 ? 1000000 : 300000);
1965
1966 /* anything responding? */
1967 if (fdc_sense_int(fdc, &st0, NULL) == 0 &&
1968 (st0 & NE7_ST0_EC) == 0)
1969 break; /* already probed successfully */
1970 }
1971 }
1972 }
1973
1974 fd_motor(fd, 0);
1975 fdc->fd = NULL;
1976 mtx_unlock(&fdc->fdc_mtx);
1977
1978 if ((flags & FD_NO_PROBE) == 0 &&
1979 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */
1980 return (ENXIO);
1981
1982 done:
1983
1984 switch (fd->type) {
1985 case FDT_12M:
1986 device_set_desc(dev, "1200-KB 5.25\" drive");
1987 break;
1988 case FDT_144M:
1989 device_set_desc(dev, "1440-KB 3.5\" drive");
1990 break;
1991 case FDT_288M:
1992 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
1993 break;
1994 case FDT_360K:
1995 device_set_desc(dev, "360-KB 5.25\" drive");
1996 break;
1997 case FDT_720K:
1998 device_set_desc(dev, "720-KB 3.5\" drive");
1999 break;
2000 default:
2001 return (ENXIO);
2002 }
2003 fd->track = FD_NO_TRACK;
2004 fd->fdc = fdc;
2005 fd->fdsu = fdsu;
2006 fd->options = 0;
2007 callout_init_mtx(&fd->toffhandle, &fd->fdc->fdc_mtx, 0);
2008
2009 /* initialize densities for subdevices */
2010 fdsettype(fd, fd_native_types[fd->type]);
2011 return (0);
2012 }
2013
2014 /*
2015 * We have to do this in a geom event because GEOM is not running
2016 * when fd_attach() is.
2017 * XXX: move fd_attach after geom like ata/scsi disks
2018 */
2019 static void
2020 fd_attach2(void *arg, int flag)
2021 {
2022 struct fd_data *fd;
2023
2024 fd = arg;
2025
2026 fd->fd_geom = g_new_geomf(&g_fd_class,
2027 "fd%d", device_get_unit(fd->dev));
2028 fd->fd_provider = g_new_providerf(fd->fd_geom, "%s", fd->fd_geom->name);
2029 fd->fd_geom->softc = fd;
2030 g_error_provider(fd->fd_provider, 0);
2031 }
2032
2033 static int
2034 fd_attach(device_t dev)
2035 {
2036 struct fd_data *fd;
2037
2038 fd = device_get_softc(dev);
2039 g_post_event(fd_attach2, fd, M_WAITOK, NULL);
2040 fd->flags |= FD_EMPTY;
2041 bioq_init(&fd->fd_bq);
2042
2043 return (0);
2044 }
2045
2046 static void
2047 fd_providergone(struct g_provider *pp)
2048 {
2049 struct fd_data *fd;
2050
2051 fd = pp->geom->softc;
2052 fd->gone = true;
2053 wakeup(fd);
2054 }
2055
2056 static void
2057 fd_detach_geom(void *arg, int flag)
2058 {
2059 struct fd_data *fd = arg;
2060
2061 g_topology_assert();
2062 g_wither_geom(fd->fd_geom, ENXIO);
2063 }
2064
2065 static int
2066 fd_detach(device_t dev)
2067 {
2068 struct fd_data *fd;
2069
2070 fd = device_get_softc(dev);
2071
2072 g_waitfor_event(fd_detach_geom, fd, M_WAITOK, NULL);
2073 while (!fd->gone) {
2074 tsleep(fd, PZERO, "fdgone", hz/10);
2075 }
2076
2077 /*
2078 * There may be accesses to the floppy while we're waitng, so drain the
2079 * motor callback here. fdc_detach turns off motor if it's still on when
2080 * we get to this point.
2081 */
2082 callout_drain(&fd->toffhandle);
2083
2084 return (0);
2085 }
2086
2087 static device_method_t fd_methods[] = {
2088 /* Device interface */
2089 DEVMETHOD(device_probe, fd_probe),
2090 DEVMETHOD(device_attach, fd_attach),
2091 DEVMETHOD(device_detach, fd_detach),
2092 DEVMETHOD(device_shutdown, bus_generic_shutdown),
2093 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
2094 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
2095 { 0, 0 }
2096 };
2097
2098 static driver_t fd_driver = {
2099 "fd",
2100 fd_methods,
2101 sizeof(struct fd_data)
2102 };
2103
2104 static int
2105 fdc_modevent(module_t mod, int type, void *data)
2106 {
2107
2108 return (g_modevent(NULL, type, &g_fd_class));
2109 }
2110
2111 DRIVER_MODULE(fd, fdc, fd_driver, fdc_modevent, 0);
Cache object: 8d7a8bb17ce2e1571635bf0f54e7d4cc
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