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("$FreeBSD$");
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 * breaks 2step! */
533 0x10 | /* Polling disabled */
534 (fifo_threshold - 1), /* Fifo threshold */
535 0x00, /* Precomp track */
536 0))
537 device_printf(fdc->fdc_dev,
538 " CONFIGURE failed in reset\n");
539 if (debugflags & 1) {
540 if (fdc_cmd(fdc, 1,
541 I8207X_DUMPREG,
542 10, &r[0], &r[1], &r[2], &r[3], &r[4],
543 &r[5], &r[6], &r[7], &r[8], &r[9]))
544 device_printf(fdc->fdc_dev,
545 " DUMPREG failed in reset\n");
546 for (i = 0; i < 10; i++)
547 printf(" %02x", r[i]);
548 printf("\n");
549 }
550 }
551 }
552
553 static int
554 fdc_sense_drive(struct fdc_data *fdc, int *st3p)
555 {
556 int st3;
557
558 if (fdc_cmd(fdc, 2, NE7CMD_SENSED, fdc->fd->fdsu, 1, &st3))
559 return (fdc_err(fdc, "Sense Drive Status failed\n"));
560 if (st3p)
561 *st3p = st3;
562 return (0);
563 }
564
565 static int
566 fdc_sense_int(struct fdc_data *fdc, int *st0p, int *cylp)
567 {
568 int cyl, st0, ret;
569
570 ret = fdc_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
571 if (ret) {
572 (void)fdc_err(fdc, "sense intr err reading stat reg 0\n");
573 return (ret);
574 }
575
576 if (st0p)
577 *st0p = st0;
578
579 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
580 /*
581 * There doesn't seem to have been an interrupt.
582 */
583 return (FD_NOT_VALID);
584 }
585
586 if (fdc_in(fdc, &cyl) < 0)
587 return fdc_err(fdc, "can't get cyl num\n");
588
589 if (cylp)
590 *cylp = cyl;
591
592 return (0);
593 }
594
595 static int
596 fdc_read_status(struct fdc_data *fdc)
597 {
598 int i, ret, status;
599
600 for (i = ret = 0; i < 7; i++) {
601 ret = fdc_in(fdc, &status);
602 fdc->status[i] = status;
603 if (ret != 0)
604 break;
605 }
606
607 if (ret == 0)
608 fdc->flags |= FDC_STAT_VALID;
609 else
610 fdc->flags &= ~FDC_STAT_VALID;
611
612 return ret;
613 }
614
615 /*
616 * Select this drive
617 */
618 static void
619 fd_select(struct fd_data *fd)
620 {
621 struct fdc_data *fdc;
622
623 /* XXX: lock controller */
624 fdc = fd->fdc;
625 fdc->fdout &= ~FDO_FDSEL;
626 fdc->fdout |= FDO_FDMAEN | FDO_FRST | fd->fdsu;
627 fdout_wr(fdc, fdc->fdout);
628 }
629
630 static void
631 fd_turnon(void *arg)
632 {
633 struct fd_data *fd;
634 struct bio *bp;
635 int once;
636
637 fd = arg;
638 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
639 fd->flags &= ~FD_MOTORWAIT;
640 fd->flags |= FD_MOTOR;
641 once = 0;
642 for (;;) {
643 bp = bioq_takefirst(&fd->fd_bq);
644 if (bp == NULL)
645 break;
646 bioq_disksort(&fd->fdc->head, bp);
647 once = 1;
648 }
649 if (once)
650 wakeup(&fd->fdc->head);
651 }
652
653 static void
654 fd_motor(struct fd_data *fd, int turnon)
655 {
656 struct fdc_data *fdc;
657
658 fdc = fd->fdc;
659 /*
660 mtx_assert(&fdc->fdc_mtx, MA_OWNED);
661 */
662 if (turnon) {
663 fd->flags |= FD_MOTORWAIT;
664 fdc->fdout |= (FDO_MOEN0 << fd->fdsu);
665 callout_reset(&fd->toffhandle, hz, fd_turnon, fd);
666 } else {
667 callout_stop(&fd->toffhandle);
668 fd->flags &= ~(FD_MOTOR|FD_MOTORWAIT);
669 fdc->fdout &= ~(FDO_MOEN0 << fd->fdsu);
670 }
671 fdout_wr(fdc, fdc->fdout);
672 }
673
674 static void
675 fd_turnoff(void *xfd)
676 {
677 struct fd_data *fd = xfd;
678
679 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
680 fd_motor(fd, 0);
681 }
682
683 /*
684 * fdc_intr - wake up the worker thread.
685 */
686
687 static void
688 fdc_intr(void *arg)
689 {
690
691 wakeup(arg);
692 }
693
694 static int
695 fdc_intr_fast(void *arg)
696 {
697
698 wakeup(arg);
699 return(FILTER_HANDLED);
700 }
701
702 /*
703 * fdc_pio(): perform programmed IO read/write for YE PCMCIA floppy.
704 */
705 static void
706 fdc_pio(struct fdc_data *fdc)
707 {
708 u_char *cptr;
709 struct bio *bp;
710 u_int count;
711
712 bp = fdc->bp;
713 cptr = fdc->fd->fd_ioptr;
714 count = fdc->fd->fd_iosize;
715
716 if (bp->bio_cmd == BIO_READ) {
717 fdbcdr_wr(fdc, 0, count);
718 bus_space_read_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
719 fdc->ioff[FD_YE_DATAPORT], cptr, count);
720 } else {
721 bus_space_write_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
722 fdc->ioff[FD_YE_DATAPORT], cptr, count);
723 fdbcdr_wr(fdc, 0, count); /* needed? */
724 }
725 }
726
727 static int
728 fdc_biodone(struct fdc_data *fdc, int error)
729 {
730 struct fd_data *fd;
731 struct bio *bp;
732
733 fd = fdc->fd;
734 bp = fdc->bp;
735
736 mtx_lock(&fdc->fdc_mtx);
737 if (--fd->fd_iocount == 0)
738 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
739 fdc->bp = NULL;
740 fdc->fd = NULL;
741 mtx_unlock(&fdc->fdc_mtx);
742 if (bp->bio_to != NULL) {
743 if ((debugflags & 2) && fd->fdc->retry > 0)
744 printf("retries: %d\n", fd->fdc->retry);
745 g_io_deliver(bp, error);
746 return (0);
747 }
748 bp->bio_error = error;
749 bp->bio_flags |= BIO_DONE;
750 wakeup(bp);
751 return (0);
752 }
753
754 static int retry_line;
755
756 static int
757 fdc_worker(struct fdc_data *fdc)
758 {
759 struct fd_data *fd;
760 struct bio *bp;
761 int i, nsect;
762 int st0, st3, cyl, mfm, steptrac, cylinder, descyl, sec;
763 int head;
764 int override_error;
765 static int need_recal;
766 struct fdc_readid *idp;
767 struct fd_formb *finfo;
768
769 override_error = 0;
770
771 /* Have we exhausted our retries ? */
772 bp = fdc->bp;
773 fd = fdc->fd;
774 if (bp != NULL &&
775 (fdc->retry >= retries || (fd->options & FDOPT_NORETRY))) {
776 if ((debugflags & 4))
777 printf("Too many retries (EIO)\n");
778 if (fdc->flags & FDC_NEEDS_RESET) {
779 mtx_lock(&fdc->fdc_mtx);
780 fd->flags |= FD_EMPTY;
781 mtx_unlock(&fdc->fdc_mtx);
782 }
783 return (fdc_biodone(fdc, EIO));
784 }
785
786 /* Disable ISADMA if we bailed while it was active */
787 if (fd != NULL && (fd->flags & FD_ISADMA)) {
788 mtx_lock(&Giant);
789 isa_dmadone(
790 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE,
791 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
792 mtx_unlock(&Giant);
793 mtx_lock(&fdc->fdc_mtx);
794 fd->flags &= ~FD_ISADMA;
795 mtx_unlock(&fdc->fdc_mtx);
796 }
797
798 /* Unwedge the controller ? */
799 if (fdc->flags & FDC_NEEDS_RESET) {
800 fdc->flags &= ~FDC_NEEDS_RESET;
801 fdc_reset(fdc);
802 tsleep(fdc, PRIBIO, "fdcrst", hz);
803 /* Discard results */
804 for (i = 0; i < 4; i++)
805 fdc_sense_int(fdc, &st0, &cyl);
806 /* All drives must recal */
807 need_recal = 0xf;
808 }
809
810 /* Pick up a request, if need be wait for it */
811 if (fdc->bp == NULL) {
812 mtx_lock(&fdc->fdc_mtx);
813 do {
814 fdc->bp = bioq_takefirst(&fdc->head);
815 if (fdc->bp == NULL)
816 msleep(&fdc->head, &fdc->fdc_mtx,
817 PRIBIO, "-", hz);
818 } while (fdc->bp == NULL &&
819 (fdc->flags & FDC_KTHREAD_EXIT) == 0);
820 mtx_unlock(&fdc->fdc_mtx);
821
822 if (fdc->bp == NULL)
823 /*
824 * Nothing to do, worker thread has been
825 * requested to stop.
826 */
827 return (0);
828
829 bp = fdc->bp;
830 fd = fdc->fd = bp->bio_driver1;
831 fdc->retry = 0;
832 fd->fd_ioptr = bp->bio_data;
833 if (bp->bio_cmd & BIO_FMT) {
834 i = offsetof(struct fd_formb, fd_formb_cylno(0));
835 fd->fd_ioptr += i;
836 fd->fd_iosize = bp->bio_length - i;
837 }
838 }
839
840 /* Select drive, setup params */
841 fd_select(fd);
842 if (fdc->fdct == FDC_ENHANCED)
843 fddsr_wr(fdc, fd->ft->trans);
844 else
845 fdctl_wr(fdc, fd->ft->trans);
846
847 if (bp->bio_cmd & BIO_PROBE) {
848 if ((!(device_get_flags(fd->dev) & FD_NO_CHLINE) &&
849 !(fdin_rd(fdc) & FDI_DCHG) &&
850 !(fd->flags & FD_EMPTY)) ||
851 fd_probe_disk(fd, &need_recal) == 0)
852 return (fdc_biodone(fdc, 0));
853 return (1);
854 }
855
856 /*
857 * If we are dead just flush the requests
858 */
859 if (fd->flags & FD_EMPTY)
860 return (fdc_biodone(fdc, ENXIO));
861
862 /* Check if we lost our media */
863 if (fdin_rd(fdc) & FDI_DCHG) {
864 if (debugflags & 0x40)
865 printf("Lost disk\n");
866 mtx_lock(&fdc->fdc_mtx);
867 fd->flags |= FD_EMPTY;
868 fd->flags |= FD_NEWDISK;
869 mtx_unlock(&fdc->fdc_mtx);
870 g_topology_lock();
871 g_orphan_provider(fd->fd_provider, ENXIO);
872 fd->fd_provider->flags |= G_PF_WITHER;
873 fd->fd_provider =
874 g_new_providerf(fd->fd_geom, fd->fd_geom->name);
875 g_error_provider(fd->fd_provider, 0);
876 g_topology_unlock();
877 return (fdc_biodone(fdc, ENXIO));
878 }
879
880 /* Check if the floppy is write-protected */
881 if(bp->bio_cmd & (BIO_FMT | BIO_WRITE)) {
882 retry_line = __LINE__;
883 if(fdc_sense_drive(fdc, &st3) != 0)
884 return (1);
885 if(st3 & NE7_ST3_WP)
886 return (fdc_biodone(fdc, EROFS));
887 }
888
889 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0;
890 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1;
891 i = fd->ft->sectrac * fd->ft->heads;
892 cylinder = bp->bio_pblkno / i;
893 descyl = cylinder * steptrac;
894 sec = bp->bio_pblkno % i;
895 nsect = i - sec;
896 head = sec / fd->ft->sectrac;
897 sec = sec % fd->ft->sectrac + 1;
898
899 /* If everything is going swimmingly, use multisector xfer */
900 if (fdc->retry == 0 && bp->bio_cmd & (BIO_READ|BIO_WRITE)) {
901 fd->fd_iosize = imin(nsect * fd->sectorsize, bp->bio_resid);
902 nsect = fd->fd_iosize / fd->sectorsize;
903 } else if (bp->bio_cmd & (BIO_READ|BIO_WRITE)) {
904 fd->fd_iosize = fd->sectorsize;
905 nsect = 1;
906 }
907
908 /* Do RECAL if we need to or are going to track zero anyway */
909 if ((need_recal & (1 << fd->fdsu)) ||
910 (cylinder == 0 && fd->track != 0) ||
911 fdc->retry > 2) {
912 retry_line = __LINE__;
913 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
914 return (1);
915 tsleep(fdc, PRIBIO, "fdrecal", hz);
916 retry_line = __LINE__;
917 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
918 return (1); /* XXX */
919 retry_line = __LINE__;
920 if ((st0 & 0xc0) || cyl != 0)
921 return (1);
922 need_recal &= ~(1 << fd->fdsu);
923 fd->track = 0;
924 /* let the heads settle */
925 if (settle)
926 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
927 }
928
929 /*
930 * SEEK to where we want to be
931 */
932 if (cylinder != fd->track) {
933 retry_line = __LINE__;
934 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, descyl, 0))
935 return (1);
936 tsleep(fdc, PRIBIO, "fdseek", hz);
937 retry_line = __LINE__;
938 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
939 return (1); /* XXX */
940 retry_line = __LINE__;
941 if ((st0 & 0xc0) || cyl != descyl) {
942 need_recal |= (1 << fd->fdsu);
943 return (1);
944 }
945 /* let the heads settle */
946 if (settle)
947 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
948 }
949 fd->track = cylinder;
950
951 if (debugflags & 8)
952 printf("op %x bn %ju siz %u ptr %p retry %d\n",
953 bp->bio_cmd, bp->bio_pblkno, fd->fd_iosize,
954 fd->fd_ioptr, fdc->retry);
955
956 /* Setup ISADMA if we need it and have it */
957 if ((bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_FMT))
958 && !(fdc->flags & FDC_NODMA)) {
959 mtx_lock(&Giant);
960 isa_dmastart(
961 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE,
962 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
963 mtx_unlock(&Giant);
964 mtx_lock(&fdc->fdc_mtx);
965 fd->flags |= FD_ISADMA;
966 mtx_unlock(&fdc->fdc_mtx);
967 }
968
969 /* Do PIO if we have to */
970 if (fdc->flags & FDC_NODMA) {
971 if (bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_FMT))
972 fdbcdr_wr(fdc, 1, fd->fd_iosize);
973 if (bp->bio_cmd & (BIO_WRITE|BIO_FMT))
974 fdc_pio(fdc);
975 }
976
977 switch(bp->bio_cmd) {
978 case BIO_FMT:
979 /* formatting */
980 finfo = (struct fd_formb *)bp->bio_data;
981 retry_line = __LINE__;
982 if (fdc_cmd(fdc, 6,
983 NE7CMD_FORMAT | mfm,
984 head << 2 | fd->fdsu,
985 finfo->fd_formb_secshift,
986 finfo->fd_formb_nsecs,
987 finfo->fd_formb_gaplen,
988 finfo->fd_formb_fillbyte, 0))
989 return (1);
990 break;
991 case BIO_RDID:
992 retry_line = __LINE__;
993 if (fdc_cmd(fdc, 2,
994 NE7CMD_READID | mfm,
995 head << 2 | fd->fdsu, 0))
996 return (1);
997 break;
998 case BIO_READ:
999 retry_line = __LINE__;
1000 if (fdc_cmd(fdc, 9,
1001 NE7CMD_READ | NE7CMD_SK | mfm | NE7CMD_MT,
1002 head << 2 | fd->fdsu, /* head & unit */
1003 fd->track, /* track */
1004 head, /* head */
1005 sec, /* sector + 1 */
1006 fd->ft->secsize, /* sector size */
1007 fd->ft->sectrac, /* sectors/track */
1008 fd->ft->gap, /* gap size */
1009 fd->ft->datalen, /* data length */
1010 0))
1011 return (1);
1012 break;
1013 case BIO_WRITE:
1014 retry_line = __LINE__;
1015 if (fdc_cmd(fdc, 9,
1016 NE7CMD_WRITE | mfm | NE7CMD_MT,
1017 head << 2 | fd->fdsu, /* head & unit */
1018 fd->track, /* track */
1019 head, /* head */
1020 sec, /* sector + 1 */
1021 fd->ft->secsize, /* sector size */
1022 fd->ft->sectrac, /* sectors/track */
1023 fd->ft->gap, /* gap size */
1024 fd->ft->datalen, /* data length */
1025 0))
1026 return (1);
1027 break;
1028 default:
1029 KASSERT(0 == 1, ("Wrong bio_cmd %x\n", bp->bio_cmd));
1030 }
1031
1032 /* Wait for interrupt */
1033 i = tsleep(fdc, PRIBIO, "fddata", hz);
1034
1035 /* PIO if the read looks good */
1036 if (i == 0 && (fdc->flags & FDC_NODMA) && (bp->bio_cmd & BIO_READ))
1037 fdc_pio(fdc);
1038
1039 /* Finish DMA */
1040 if (fd->flags & FD_ISADMA) {
1041 mtx_lock(&Giant);
1042 isa_dmadone(
1043 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE,
1044 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
1045 mtx_unlock(&Giant);
1046 mtx_lock(&fdc->fdc_mtx);
1047 fd->flags &= ~FD_ISADMA;
1048 mtx_unlock(&fdc->fdc_mtx);
1049 }
1050
1051 if (i != 0) {
1052 /*
1053 * Timeout.
1054 *
1055 * Due to IBM's brain-dead design, the FDC has a faked ready
1056 * signal, hardwired to ready == true. Thus, any command
1057 * issued if there's no diskette in the drive will _never_
1058 * complete, and must be aborted by resetting the FDC.
1059 * Many thanks, Big Blue!
1060 */
1061 retry_line = __LINE__;
1062 fdc->flags |= FDC_NEEDS_RESET;
1063 return (1);
1064 }
1065
1066 retry_line = __LINE__;
1067 if (fdc_read_status(fdc))
1068 return (1);
1069
1070 if (debugflags & 0x10)
1071 printf(" -> %x %x %x %x\n",
1072 fdc->status[0], fdc->status[1],
1073 fdc->status[2], fdc->status[3]);
1074
1075 st0 = fdc->status[0] & NE7_ST0_IC;
1076 if (st0 != 0) {
1077 retry_line = __LINE__;
1078 if (st0 == NE7_ST0_IC_AT && fdc->status[1] & NE7_ST1_OR) {
1079 /*
1080 * DMA overrun. Someone hogged the bus and
1081 * didn't release it in time for the next
1082 * FDC transfer.
1083 */
1084 return (1);
1085 }
1086 retry_line = __LINE__;
1087 if(st0 == NE7_ST0_IC_IV) {
1088 fdc->flags |= FDC_NEEDS_RESET;
1089 return (1);
1090 }
1091 retry_line = __LINE__;
1092 if(st0 == NE7_ST0_IC_AT && fdc->status[2] & NE7_ST2_WC) {
1093 need_recal |= (1 << fd->fdsu);
1094 return (1);
1095 }
1096 if (debugflags & 0x20) {
1097 printf("status %02x %02x %02x %02x %02x %02x\n",
1098 fdc->status[0], fdc->status[1], fdc->status[2],
1099 fdc->status[3], fdc->status[4], fdc->status[5]);
1100 }
1101 retry_line = __LINE__;
1102 if (fd->options & FDOPT_NOERROR)
1103 override_error = 1;
1104 else
1105 return (1);
1106 }
1107 /* All OK */
1108 switch(bp->bio_cmd) {
1109 case BIO_RDID:
1110 /* copy out ID field contents */
1111 idp = (struct fdc_readid *)bp->bio_data;
1112 idp->cyl = fdc->status[3];
1113 idp->head = fdc->status[4];
1114 idp->sec = fdc->status[5];
1115 idp->secshift = fdc->status[6];
1116 if (debugflags & 0x40)
1117 printf("c %d h %d s %d z %d\n",
1118 idp->cyl, idp->head, idp->sec, idp->secshift);
1119 break;
1120 case BIO_READ:
1121 case BIO_WRITE:
1122 bp->bio_pblkno += nsect;
1123 bp->bio_resid -= fd->fd_iosize;
1124 bp->bio_completed += fd->fd_iosize;
1125 fd->fd_ioptr += fd->fd_iosize;
1126 if (override_error) {
1127 if ((debugflags & 4))
1128 printf("FDOPT_NOERROR: returning bad data\n");
1129 } else {
1130 /* Since we managed to get something done,
1131 * reset the retry */
1132 fdc->retry = 0;
1133 if (bp->bio_resid > 0)
1134 return (0);
1135 }
1136 break;
1137 case BIO_FMT:
1138 break;
1139 }
1140 return (fdc_biodone(fdc, 0));
1141 }
1142
1143 static void
1144 fdc_thread(void *arg)
1145 {
1146 struct fdc_data *fdc;
1147
1148 fdc = arg;
1149 int i;
1150
1151 mtx_lock(&fdc->fdc_mtx);
1152 fdc->flags |= FDC_KTHREAD_ALIVE;
1153 while ((fdc->flags & FDC_KTHREAD_EXIT) == 0) {
1154 mtx_unlock(&fdc->fdc_mtx);
1155 i = fdc_worker(fdc);
1156 if (i && debugflags & 0x20) {
1157 if (fdc->bp != NULL) {
1158 g_print_bio(fdc->bp);
1159 printf("\n");
1160 }
1161 printf("Retry line %d\n", retry_line);
1162 }
1163 fdc->retry += i;
1164 mtx_lock(&fdc->fdc_mtx);
1165 }
1166 fdc->flags &= ~(FDC_KTHREAD_EXIT | FDC_KTHREAD_ALIVE);
1167 mtx_unlock(&fdc->fdc_mtx);
1168
1169 kproc_exit(0);
1170 }
1171
1172 /*
1173 * Enqueue a request.
1174 */
1175 static void
1176 fd_enqueue(struct fd_data *fd, struct bio *bp)
1177 {
1178 struct fdc_data *fdc;
1179 int call;
1180
1181 call = 0;
1182 fdc = fd->fdc;
1183 mtx_lock(&fdc->fdc_mtx);
1184 /* If we go from idle, cancel motor turnoff */
1185 if (fd->fd_iocount++ == 0)
1186 callout_stop(&fd->toffhandle);
1187 if (fd->flags & FD_MOTOR) {
1188 /* The motor is on, send it directly to the controller */
1189 bioq_disksort(&fdc->head, bp);
1190 wakeup(&fdc->head);
1191 } else {
1192 /* Queue it on the drive until the motor has started */
1193 bioq_insert_tail(&fd->fd_bq, bp);
1194 if (!(fd->flags & FD_MOTORWAIT))
1195 fd_motor(fd, 1);
1196 }
1197 mtx_unlock(&fdc->fdc_mtx);
1198 }
1199
1200 /*
1201 * Try to find out if we have a disk in the drive.
1202 */
1203 static int
1204 fd_probe_disk(struct fd_data *fd, int *recal)
1205 {
1206 struct fdc_data *fdc;
1207 int st0, st3, cyl;
1208 int oopts, ret;
1209
1210 fdc = fd->fdc;
1211 oopts = fd->options;
1212 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1213 ret = 1;
1214
1215 /*
1216 * First recal, then seek to cyl#1, this clears the old condition on
1217 * the disk change line so we can examine it for current status.
1218 */
1219 if (debugflags & 0x40)
1220 printf("New disk in probe\n");
1221 mtx_lock(&fdc->fdc_mtx);
1222 fd->flags |= FD_NEWDISK;
1223 mtx_unlock(&fdc->fdc_mtx);
1224 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
1225 goto done;
1226 tsleep(fdc, PRIBIO, "fdrecal", hz);
1227 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1228 goto done; /* XXX */
1229 if ((st0 & 0xc0) || cyl != 0)
1230 goto done;
1231
1232 /* Seek to track 1 */
1233 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, 1, 0))
1234 goto done;
1235 tsleep(fdc, PRIBIO, "fdseek", hz);
1236 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1237 goto done; /* XXX */
1238 *recal |= (1 << fd->fdsu);
1239 if (fdin_rd(fdc) & FDI_DCHG) {
1240 if (debugflags & 0x40)
1241 printf("Empty in probe\n");
1242 mtx_lock(&fdc->fdc_mtx);
1243 fd->flags |= FD_EMPTY;
1244 mtx_unlock(&fdc->fdc_mtx);
1245 } else {
1246 if (fdc_sense_drive(fdc, &st3) != 0)
1247 goto done;
1248 if (debugflags & 0x40)
1249 printf("Got disk in probe\n");
1250 mtx_lock(&fdc->fdc_mtx);
1251 fd->flags &= ~FD_EMPTY;
1252 if (st3 & NE7_ST3_WP)
1253 fd->flags |= FD_WP;
1254 else
1255 fd->flags &= ~FD_WP;
1256 mtx_unlock(&fdc->fdc_mtx);
1257 }
1258 ret = 0;
1259
1260 done:
1261 fd->options = oopts;
1262 return (ret);
1263 }
1264
1265 static int
1266 fdmisccmd(struct fd_data *fd, u_int cmd, void *data)
1267 {
1268 struct bio *bp;
1269 struct fd_formb *finfo;
1270 struct fdc_readid *idfield;
1271 int error;
1272
1273 bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO);
1274
1275 /*
1276 * Set up a bio request for fdstrategy(). bio_offset is faked
1277 * so that fdstrategy() will seek to the requested
1278 * cylinder, and use the desired head.
1279 */
1280 bp->bio_cmd = cmd;
1281 if (cmd == BIO_FMT) {
1282 finfo = (struct fd_formb *)data;
1283 bp->bio_pblkno =
1284 (finfo->cyl * fd->ft->heads + finfo->head) *
1285 fd->ft->sectrac;
1286 bp->bio_length = sizeof *finfo;
1287 } else if (cmd == BIO_RDID) {
1288 idfield = (struct fdc_readid *)data;
1289 bp->bio_pblkno =
1290 (idfield->cyl * fd->ft->heads + idfield->head) *
1291 fd->ft->sectrac;
1292 bp->bio_length = sizeof(struct fdc_readid);
1293 } else if (cmd == BIO_PROBE) {
1294 /* nothing */
1295 } else
1296 panic("wrong cmd in fdmisccmd()");
1297 bp->bio_offset = bp->bio_pblkno * fd->sectorsize;
1298 bp->bio_data = data;
1299 bp->bio_driver1 = fd;
1300 bp->bio_flags = 0;
1301
1302 fd_enqueue(fd, bp);
1303
1304 do {
1305 tsleep(bp, PRIBIO, "fdwait", hz);
1306 } while (!(bp->bio_flags & BIO_DONE));
1307 error = bp->bio_error;
1308
1309 free(bp, M_TEMP);
1310 return (error);
1311 }
1312
1313 /*
1314 * Try figuring out the density of the media present in our device.
1315 */
1316 static int
1317 fdautoselect(struct fd_data *fd)
1318 {
1319 struct fd_type *fdtp;
1320 struct fdc_readid id;
1321 int oopts, rv;
1322
1323 if (!(fd->ft->flags & FL_AUTO))
1324 return (0);
1325
1326 fdtp = fd_native_types[fd->type];
1327 fdsettype(fd, fdtp);
1328 if (!(fd->ft->flags & FL_AUTO))
1329 return (0);
1330
1331 /*
1332 * Try reading sector ID fields, first at cylinder 0, head 0,
1333 * then at cylinder 2, head N. We don't probe cylinder 1,
1334 * since for 5.25in DD media in a HD drive, there are no data
1335 * to read (2 step pulses per media cylinder required). For
1336 * two-sided media, the second probe always goes to head 1, so
1337 * we can tell them apart from single-sided media. As a
1338 * side-effect this means that single-sided media should be
1339 * mentioned in the search list after two-sided media of an
1340 * otherwise identical density. Media with a different number
1341 * of sectors per track but otherwise identical parameters
1342 * cannot be distinguished at all.
1343 *
1344 * If we successfully read an ID field on both cylinders where
1345 * the recorded values match our expectation, we are done.
1346 * Otherwise, we try the next density entry from the table.
1347 *
1348 * Stepping to cylinder 2 has the side-effect of clearing the
1349 * unit attention bit.
1350 */
1351 oopts = fd->options;
1352 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1353 for (; fdtp->heads; fdtp++) {
1354 fdsettype(fd, fdtp);
1355
1356 id.cyl = id.head = 0;
1357 rv = fdmisccmd(fd, BIO_RDID, &id);
1358 if (rv != 0)
1359 continue;
1360 if (id.cyl != 0 || id.head != 0 || id.secshift != fdtp->secsize)
1361 continue;
1362 id.cyl = 2;
1363 id.head = fd->ft->heads - 1;
1364 rv = fdmisccmd(fd, BIO_RDID, &id);
1365 if (id.cyl != 2 || id.head != fdtp->heads - 1 ||
1366 id.secshift != fdtp->secsize)
1367 continue;
1368 if (rv == 0)
1369 break;
1370 }
1371
1372 fd->options = oopts;
1373 if (fdtp->heads == 0) {
1374 if (debugflags & 0x40)
1375 device_printf(fd->dev, "autoselection failed\n");
1376 fdsettype(fd, fd_native_types[fd->type]);
1377 return (-1);
1378 } else {
1379 if (debugflags & 0x40) {
1380 device_printf(fd->dev,
1381 "autoselected %d KB medium\n", fd->ft->size / 2);
1382 fdprinttype(fd->ft);
1383 }
1384 return (0);
1385 }
1386 }
1387
1388 /*
1389 * GEOM class implementation
1390 */
1391
1392 static g_access_t fd_access;
1393 static g_start_t fd_start;
1394 static g_ioctl_t fd_ioctl;
1395
1396 struct g_class g_fd_class = {
1397 .name = "FD",
1398 .version = G_VERSION,
1399 .start = fd_start,
1400 .access = fd_access,
1401 .ioctl = fd_ioctl,
1402 };
1403
1404 static int
1405 fd_access(struct g_provider *pp, int r, int w, int e)
1406 {
1407 struct fd_data *fd;
1408 struct fdc_data *fdc;
1409 int ar, aw, ae;
1410 int busy;
1411
1412 fd = pp->geom->softc;
1413 fdc = fd->fdc;
1414
1415 /*
1416 * If our provider is withering, we can only get negative requests
1417 * and we don't want to even see them
1418 */
1419 if (pp->flags & G_PF_WITHER)
1420 return (0);
1421
1422 ar = r + pp->acr;
1423 aw = w + pp->acw;
1424 ae = e + pp->ace;
1425
1426 if (ar == 0 && aw == 0 && ae == 0) {
1427 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR);
1428 device_unbusy(fd->dev);
1429 return (0);
1430 }
1431
1432 busy = 0;
1433 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) {
1434 if (fdmisccmd(fd, BIO_PROBE, NULL))
1435 return (ENXIO);
1436 if (fd->flags & FD_EMPTY)
1437 return (ENXIO);
1438 if (fd->flags & FD_NEWDISK) {
1439 if (fdautoselect(fd) != 0 &&
1440 (device_get_flags(fd->dev) & FD_NO_CHLINE)) {
1441 mtx_lock(&fdc->fdc_mtx);
1442 fd->flags |= FD_EMPTY;
1443 mtx_unlock(&fdc->fdc_mtx);
1444 return (ENXIO);
1445 }
1446 mtx_lock(&fdc->fdc_mtx);
1447 fd->flags &= ~FD_NEWDISK;
1448 mtx_unlock(&fdc->fdc_mtx);
1449 }
1450 device_busy(fd->dev);
1451 busy = 1;
1452 }
1453
1454 if (w > 0 && (fd->flags & FD_WP)) {
1455 if (busy)
1456 device_unbusy(fd->dev);
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 fdc_data * fdc;
1470 struct fd_data * fd;
1471
1472 fd = bp->bio_to->geom->softc;
1473 fdc = fd->fdc;
1474 bp->bio_driver1 = fd;
1475 if (bp->bio_cmd & BIO_GETATTR) {
1476 if (g_handleattr_int(bp, "GEOM::fwsectors", fd->ft->sectrac))
1477 return;
1478 if (g_handleattr_int(bp, "GEOM::fwheads", fd->ft->heads))
1479 return;
1480 g_io_deliver(bp, ENOIOCTL);
1481 return;
1482 }
1483 if (!(bp->bio_cmd & (BIO_READ|BIO_WRITE))) {
1484 g_io_deliver(bp, EOPNOTSUPP);
1485 return;
1486 }
1487 bp->bio_pblkno = bp->bio_offset / fd->sectorsize;
1488 bp->bio_resid = bp->bio_length;
1489 fd_enqueue(fd, bp);
1490 return;
1491 }
1492
1493 static int
1494 fd_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td)
1495 {
1496 struct fd_data *fd;
1497 struct fdc_status *fsp;
1498 struct fdc_readid *rid;
1499 int error;
1500
1501 fd = pp->geom->softc;
1502
1503 switch (cmd) {
1504 case FD_GTYPE: /* get drive type */
1505 *(struct fd_type *)data = *fd->ft;
1506 return (0);
1507
1508 case FD_STYPE: /* set drive type */
1509 /*
1510 * Allow setting drive type temporarily iff
1511 * currently unset. Used for fdformat so any
1512 * user can set it, and then start formatting.
1513 */
1514 fd->fts = *(struct fd_type *)data;
1515 if (fd->fts.sectrac) {
1516 /* XXX: check for rubbish */
1517 fdsettype(fd, &fd->fts);
1518 } else {
1519 fdsettype(fd, fd_native_types[fd->type]);
1520 }
1521 if (debugflags & 0x40)
1522 fdprinttype(fd->ft);
1523 return (0);
1524
1525 case FD_GOPTS: /* get drive options */
1526 *(int *)data = fd->options;
1527 return (0);
1528
1529 case FD_SOPTS: /* set drive options */
1530 fd->options = *(int *)data;
1531 return (0);
1532
1533 case FD_CLRERR:
1534 error = priv_check(td, PRIV_DRIVER);
1535 if (error)
1536 return (error);
1537 fd->fdc->fdc_errs = 0;
1538 return (0);
1539
1540 case FD_GSTAT:
1541 fsp = (struct fdc_status *)data;
1542 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
1543 return (EINVAL);
1544 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
1545 return (0);
1546
1547 case FD_GDTYPE:
1548 *(enum fd_drivetype *)data = fd->type;
1549 return (0);
1550
1551 case FD_FORM:
1552 if (!(fflag & FWRITE))
1553 return (EPERM);
1554 if (((struct fd_formb *)data)->format_version !=
1555 FD_FORMAT_VERSION)
1556 return (EINVAL); /* wrong version of formatting prog */
1557 error = fdmisccmd(fd, BIO_FMT, data);
1558 mtx_lock(&fd->fdc->fdc_mtx);
1559 fd->flags |= FD_NEWDISK;
1560 mtx_unlock(&fd->fdc->fdc_mtx);
1561 break;
1562
1563 case FD_READID:
1564 rid = (struct fdc_readid *)data;
1565 if (rid->cyl > 85 || rid->head > 1)
1566 return (EINVAL);
1567 error = fdmisccmd(fd, BIO_RDID, data);
1568 break;
1569
1570 case FIONBIO:
1571 case FIOASYNC:
1572 /* For backwards compat with old fd*(8) tools */
1573 error = 0;
1574 break;
1575
1576 default:
1577 if (debugflags & 0x80)
1578 printf("Unknown ioctl %lx\n", cmd);
1579 error = ENOIOCTL;
1580 break;
1581 }
1582 return (error);
1583 };
1584
1585
1586
1587 /*
1588 * Configuration/initialization stuff, per controller.
1589 */
1590
1591 devclass_t fdc_devclass;
1592 static devclass_t fd_devclass;
1593
1594 struct fdc_ivars {
1595 int fdunit;
1596 int fdtype;
1597 };
1598
1599 void
1600 fdc_release_resources(struct fdc_data *fdc)
1601 {
1602 device_t dev;
1603 struct resource *last;
1604 int i;
1605
1606 dev = fdc->fdc_dev;
1607 if (fdc->fdc_intr)
1608 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1609 fdc->fdc_intr = NULL;
1610 if (fdc->res_irq != NULL)
1611 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
1612 fdc->res_irq);
1613 fdc->res_irq = NULL;
1614 last = NULL;
1615 for (i = 0; i < FDC_MAXREG; i++) {
1616 if (fdc->resio[i] != NULL && fdc->resio[i] != last) {
1617 bus_release_resource(dev, SYS_RES_IOPORT,
1618 fdc->ridio[i], fdc->resio[i]);
1619 last = fdc->resio[i];
1620 fdc->resio[i] = NULL;
1621 }
1622 }
1623 if (fdc->res_drq != NULL)
1624 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
1625 fdc->res_drq);
1626 fdc->res_drq = NULL;
1627 }
1628
1629 int
1630 fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
1631 {
1632 struct fdc_ivars *ivars = device_get_ivars(child);
1633
1634 switch (which) {
1635 case FDC_IVAR_FDUNIT:
1636 *result = ivars->fdunit;
1637 break;
1638 case FDC_IVAR_FDTYPE:
1639 *result = ivars->fdtype;
1640 break;
1641 default:
1642 return (ENOENT);
1643 }
1644 return (0);
1645 }
1646
1647 int
1648 fdc_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
1649 {
1650 struct fdc_ivars *ivars = device_get_ivars(child);
1651
1652 switch (which) {
1653 case FDC_IVAR_FDUNIT:
1654 ivars->fdunit = value;
1655 break;
1656 case FDC_IVAR_FDTYPE:
1657 ivars->fdtype = value;
1658 break;
1659 default:
1660 return (ENOENT);
1661 }
1662 return (0);
1663 }
1664
1665 int
1666 fdc_initial_reset(device_t dev, struct fdc_data *fdc)
1667 {
1668 int ic_type, part_id;
1669
1670 /*
1671 * A status value of 0xff is very unlikely, but not theoretically
1672 * impossible, but it is far more likely to indicate an empty bus.
1673 */
1674 if (fdsts_rd(fdc) == 0xff)
1675 return (ENXIO);
1676
1677 /*
1678 * Assert a reset to the floppy controller and check that the status
1679 * register goes to zero.
1680 */
1681 fdout_wr(fdc, 0);
1682 fdout_wr(fdc, 0);
1683 if (fdsts_rd(fdc) != 0)
1684 return (ENXIO);
1685
1686 /*
1687 * Clear the reset and see it come ready.
1688 */
1689 fdout_wr(fdc, FDO_FRST);
1690 DELAY(100);
1691 if (fdsts_rd(fdc) != 0x80)
1692 return (ENXIO);
1693
1694 /* Then, see if it can handle a command. */
1695 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, 0xaf, 0x1e, 0))
1696 return (ENXIO);
1697
1698 /*
1699 * Try to identify the chip.
1700 *
1701 * The i8272 datasheet documents that unknown commands
1702 * will return ST0 as 0x80. The i8272 is supposedly identical
1703 * to the NEC765.
1704 * The i82077SL datasheet says 0x90 for the VERSION command,
1705 * and several "superio" chips emulate this.
1706 */
1707 if (fdc_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type))
1708 return (ENXIO);
1709 if (fdc_cmd(fdc, 1, 0x18, 1, &part_id))
1710 return (ENXIO);
1711 if (bootverbose)
1712 device_printf(dev,
1713 "ic_type %02x part_id %02x\n", ic_type, part_id);
1714 switch (ic_type & 0xff) {
1715 case 0x80:
1716 device_set_desc(dev, "NEC 765 or clone");
1717 fdc->fdct = FDC_NE765;
1718 break;
1719 case 0x81:
1720 case 0x90:
1721 device_set_desc(dev,
1722 "Enhanced floppy controller");
1723 fdc->fdct = FDC_ENHANCED;
1724 break;
1725 default:
1726 device_set_desc(dev, "Generic floppy controller");
1727 fdc->fdct = FDC_UNKNOWN;
1728 break;
1729 }
1730 return (0);
1731 }
1732
1733 int
1734 fdc_detach(device_t dev)
1735 {
1736 struct fdc_data *fdc;
1737 int error;
1738
1739 fdc = device_get_softc(dev);
1740
1741 /* have our children detached first */
1742 if ((error = bus_generic_detach(dev)))
1743 return (error);
1744
1745 if (fdc->fdc_intr)
1746 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1747 fdc->fdc_intr = NULL;
1748
1749 /* kill worker thread */
1750 mtx_lock(&fdc->fdc_mtx);
1751 fdc->flags |= FDC_KTHREAD_EXIT;
1752 wakeup(&fdc->head);
1753 while ((fdc->flags & FDC_KTHREAD_ALIVE) != 0)
1754 msleep(fdc->fdc_thread, &fdc->fdc_mtx, PRIBIO, "fdcdet", 0);
1755 mtx_unlock(&fdc->fdc_mtx);
1756
1757 /* reset controller, turn motor off */
1758 fdout_wr(fdc, 0);
1759
1760 if (!(fdc->flags & FDC_NODMA))
1761 isa_dma_release(fdc->dmachan);
1762 fdc_release_resources(fdc);
1763 mtx_destroy(&fdc->fdc_mtx);
1764 return (0);
1765 }
1766
1767 /*
1768 * Add a child device to the fdc controller. It will then be probed etc.
1769 */
1770 device_t
1771 fdc_add_child(device_t dev, const char *name, int unit)
1772 {
1773 struct fdc_ivars *ivar;
1774 device_t child;
1775
1776 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO);
1777 if (ivar == NULL)
1778 return (NULL);
1779 child = device_add_child(dev, name, unit);
1780 if (child == NULL) {
1781 free(ivar, M_DEVBUF);
1782 return (NULL);
1783 }
1784 device_set_ivars(child, ivar);
1785 ivar->fdunit = unit;
1786 ivar->fdtype = FDT_NONE;
1787 if (resource_disabled(name, unit))
1788 device_disable(child);
1789 return (child);
1790 }
1791
1792 int
1793 fdc_attach(device_t dev)
1794 {
1795 struct fdc_data *fdc;
1796 int error;
1797
1798 fdc = device_get_softc(dev);
1799 fdc->fdc_dev = dev;
1800 error = fdc_initial_reset(dev, fdc);
1801 if (error) {
1802 device_printf(dev, "does not respond\n");
1803 return (error);
1804 }
1805 error = bus_setup_intr(dev, fdc->res_irq,
1806 INTR_TYPE_BIO | INTR_ENTROPY |
1807 ((fdc->flags & FDC_NOFAST) ? INTR_MPSAFE : 0),
1808 ((fdc->flags & FDC_NOFAST) ? NULL : fdc_intr_fast),
1809 ((fdc->flags & FDC_NOFAST) ? fdc_intr : NULL),
1810 fdc, &fdc->fdc_intr);
1811 if (error) {
1812 device_printf(dev, "cannot setup interrupt\n");
1813 return (error);
1814 }
1815 if (!(fdc->flags & FDC_NODMA)) {
1816 error = isa_dma_acquire(fdc->dmachan);
1817 if (!error) {
1818 error = isa_dma_init(fdc->dmachan,
1819 MAX_BYTES_PER_CYL, M_WAITOK);
1820 if (error)
1821 isa_dma_release(fdc->dmachan);
1822 }
1823 if (error)
1824 return (error);
1825 }
1826 fdc->fdcu = device_get_unit(dev);
1827 fdc->flags |= FDC_NEEDS_RESET;
1828
1829 mtx_init(&fdc->fdc_mtx, "fdc lock", NULL, MTX_DEF);
1830
1831 /* reset controller, turn motor off, clear fdout mirror reg */
1832 fdout_wr(fdc, fdc->fdout = 0);
1833 bioq_init(&fdc->head);
1834
1835 kproc_create(fdc_thread, fdc, &fdc->fdc_thread, 0, 0,
1836 "fdc%d", device_get_unit(dev));
1837
1838 settle = hz / 8;
1839
1840 return (0);
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 int i, unit;
1887 u_int st0, st3;
1888 struct fd_data *fd;
1889 struct fdc_data *fdc;
1890 int fdsu;
1891 int flags, type;
1892
1893 fdsu = fdc_get_fdunit(dev);
1894 fd = device_get_softc(dev);
1895 fdc = device_get_softc(device_get_parent(dev));
1896 flags = device_get_flags(dev);
1897
1898 fd->dev = dev;
1899 fd->fdc = fdc;
1900 fd->fdsu = fdsu;
1901 unit = device_get_unit(dev);
1902
1903 /* Auto-probe if fdinfo is present, but always allow override. */
1904 type = flags & FD_TYPEMASK;
1905 if (type == FDT_NONE && (type = fdc_get_fdtype(dev)) != FDT_NONE) {
1906 fd->type = type;
1907 goto done;
1908 } else {
1909 /* make sure fdautoselect() will be called */
1910 fd->flags = FD_EMPTY;
1911 fd->type = type;
1912 }
1913
1914 #if (defined(__i386__) && !defined(PC98)) || defined(__amd64__)
1915 if (fd->type == FDT_NONE && (unit == 0 || unit == 1)) {
1916 /* Look up what the BIOS thinks we have. */
1917 if (unit == 0)
1918 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4;
1919 else
1920 fd->type = rtcin(RTC_FDISKETTE) & 0x0f;
1921 if (fd->type == FDT_288M_1)
1922 fd->type = FDT_288M;
1923 }
1924 #endif /* __i386__ || __amd64__ */
1925 /* is there a unit? */
1926 if (fd->type == FDT_NONE)
1927 return (ENXIO);
1928
1929 /*
1930 mtx_lock(&fdc->fdc_mtx);
1931 */
1932 /* select it */
1933 fd_select(fd);
1934 fd_motor(fd, 1);
1935 fdc->fd = fd;
1936 fdc_reset(fdc); /* XXX reset, then unreset, etc. */
1937 DELAY(1000000); /* 1 sec */
1938
1939 if ((flags & FD_NO_PROBE) == 0) {
1940 /* If we're at track 0 first seek inwards. */
1941 if ((fdc_sense_drive(fdc, &st3) == 0) &&
1942 (st3 & NE7_ST3_T0)) {
1943 /* Seek some steps... */
1944 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
1945 /* ...wait a moment... */
1946 DELAY(300000);
1947 /* make ctrlr happy: */
1948 fdc_sense_int(fdc, NULL, NULL);
1949 }
1950 }
1951
1952 for (i = 0; i < 2; i++) {
1953 /*
1954 * we must recalibrate twice, just in case the
1955 * heads have been beyond cylinder 76, since
1956 * most FDCs still barf when attempting to
1957 * recalibrate more than 77 steps
1958 */
1959 /* go back to 0: */
1960 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
1961 /* a second being enough for full stroke seek*/
1962 DELAY(i == 0 ? 1000000 : 300000);
1963
1964 /* anything responding? */
1965 if (fdc_sense_int(fdc, &st0, NULL) == 0 &&
1966 (st0 & NE7_ST0_EC) == 0)
1967 break; /* already probed succesfully */
1968 }
1969 }
1970 }
1971
1972 fd_motor(fd, 0);
1973 fdc->fd = NULL;
1974 /*
1975 mtx_unlock(&fdc->fdc_mtx);
1976 */
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, 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_detach_geom(void *arg, int flag)
2048 {
2049 struct fd_data *fd = arg;
2050
2051 g_topology_assert();
2052 g_wither_geom(fd->fd_geom, ENXIO);
2053 }
2054
2055 static int
2056 fd_detach(device_t dev)
2057 {
2058 struct fd_data *fd;
2059
2060 fd = device_get_softc(dev);
2061 g_waitfor_event(fd_detach_geom, fd, M_WAITOK, NULL);
2062 while (device_get_state(dev) == DS_BUSY)
2063 tsleep(fd, PZERO, "fdd", hz/10);
2064 callout_drain(&fd->toffhandle);
2065
2066 return (0);
2067 }
2068
2069 static device_method_t fd_methods[] = {
2070 /* Device interface */
2071 DEVMETHOD(device_probe, fd_probe),
2072 DEVMETHOD(device_attach, fd_attach),
2073 DEVMETHOD(device_detach, fd_detach),
2074 DEVMETHOD(device_shutdown, bus_generic_shutdown),
2075 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
2076 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
2077 { 0, 0 }
2078 };
2079
2080 static driver_t fd_driver = {
2081 "fd",
2082 fd_methods,
2083 sizeof(struct fd_data)
2084 };
2085
2086 static int
2087 fdc_modevent(module_t mod, int type, void *data)
2088 {
2089
2090 return (g_modevent(NULL, type, &g_fd_class));
2091 }
2092
2093 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, fdc_modevent, 0);
Cache object: 34076c6cd025a4d3dac4be0c5d76cf44
|