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 ([email protected])
12 * aided by the Linux floppy driver modifications from David Bateman
13 * ([email protected]).
14 *
15 * Copyright (c) 1993, 1994 by
16 * [email protected] (John Capo)
17 * [email protected] (Serge Vakulenko)
18 * [email protected] (Andrew A. Chernov)
19 *
20 * Copyright (c) 1993, 1994, 1995 by
21 * [email protected] (Joerg Wunsch)
22 * [email protected] (Peter Dufault)
23 *
24 * Copyright (c) 2001 Joerg Wunsch,
25 * [email protected] (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 #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 <isa/rtc.h>
87 #include <dev/fdc/fdcvar.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_400 | FL_AUTO },
146 { FDF_5_360 | FL_2STEP | FL_AUTO},
147 { 0 }
148 };
149
150 static struct fd_type fd_searchlist_720k[] = {
151 { FDF_3_720 },
152 { 0 }
153 };
154
155 static struct fd_type fd_searchlist_144m[] = {
156 { FDF_3_1440 | FL_AUTO},
157 { FDF_3_720 | FL_AUTO},
158 { 0 }
159 };
160
161 static struct fd_type fd_searchlist_288m[] = {
162 { FDF_3_1440 | FL_AUTO },
163 #if 0
164 { FDF_3_2880 | FL_AUTO }, /* XXX: probably doesn't work */
165 #endif
166 { FDF_3_720 | FL_AUTO},
167 { 0 }
168 };
169
170 /*
171 * Order must match enum fd_drivetype in <sys/fdcio.h>.
172 */
173 static struct fd_type *fd_native_types[] = {
174 NULL, /* FDT_NONE */
175 fd_searchlist_360k, /* FDT_360K */
176 fd_searchlist_12m, /* FDT_12M */
177 fd_searchlist_720k, /* FDT_720K */
178 fd_searchlist_144m, /* FDT_144M */
179 fd_searchlist_288m, /* FDT_288M_1 (mapped to FDT_288M) */
180 fd_searchlist_288m, /* FDT_288M */
181 };
182
183 /*
184 * Internals start here
185 */
186
187 /* registers */
188 #define FDOUT 2 /* Digital Output Register (W) */
189 #define FDO_FDSEL 0x03 /* floppy device select */
190 #define FDO_FRST 0x04 /* floppy controller reset */
191 #define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */
192 #define FDO_MOEN0 0x10 /* motor enable drive 0 */
193 #define FDO_MOEN1 0x20 /* motor enable drive 1 */
194 #define FDO_MOEN2 0x40 /* motor enable drive 2 */
195 #define FDO_MOEN3 0x80 /* motor enable drive 3 */
196
197 #define FDSTS 4 /* NEC 765 Main Status Register (R) */
198 #define FDDSR 4 /* Data Rate Select Register (W) */
199 #define FDDATA 5 /* NEC 765 Data Register (R/W) */
200 #define FDCTL 7 /* Control Register (W) */
201
202 /*
203 * The YE-DATA PC Card floppies use PIO to read in the data rather
204 * than DMA due to the wild variability of DMA for the PC Card
205 * devices. DMA was deleted from the PC Card specification in version
206 * 7.2 of the standard, but that post-dates the YE-DATA devices by many
207 * years.
208 *
209 * In addition, if we cannot setup the DMA resources for the ISA
210 * attachment, we'll use this same offset for data transfer. However,
211 * that almost certainly won't work.
212 *
213 * For this mode, offset 0 and 1 must be used to setup the transfer
214 * for this floppy. This is OK for PC Card YE Data devices, but for
215 * ISA this is likely wrong. These registers are only available on
216 * those systems that map them to the floppy drive. Newer systems do
217 * not do this, and we should likely prohibit access to them (or
218 * disallow NODMA to be set).
219 */
220 #define FDBCDR 0 /* And 1 */
221 #define FD_YE_DATAPORT 6 /* Drive Data port */
222
223 #define FDI_DCHG 0x80 /* diskette has been changed */
224 /* requires drive and motor being selected */
225 /* is cleared by any step pulse to drive */
226
227 /*
228 * We have three private BIO commands.
229 */
230 #define BIO_PROBE BIO_CMD0
231 #define BIO_RDID BIO_CMD1
232 #define BIO_FMT BIO_CMD2
233
234 /*
235 * Per drive structure (softc).
236 */
237 struct fd_data {
238 u_char *fd_ioptr; /* IO pointer */
239 u_int fd_iosize; /* Size of IO chunks */
240 u_int fd_iocount; /* Outstanding requests */
241 struct fdc_data *fdc; /* pointer to controller structure */
242 int fdsu; /* this units number on this controller */
243 enum fd_drivetype type; /* drive type */
244 struct fd_type *ft; /* pointer to current type descriptor */
245 struct fd_type fts; /* type descriptors */
246 int sectorsize;
247 int flags;
248 #define FD_WP (1<<0) /* Write protected */
249 #define FD_MOTOR (1<<1) /* motor should be on */
250 #define FD_MOTORWAIT (1<<2) /* motor should be on */
251 #define FD_EMPTY (1<<3) /* no media */
252 #define FD_NEWDISK (1<<4) /* media changed */
253 #define FD_ISADMA (1<<5) /* isa dma started */
254 int track; /* where we think the head is */
255 #define FD_NO_TRACK -2
256 int options; /* FDOPT_* */
257 struct callout toffhandle;
258 struct g_geom *fd_geom;
259 struct g_provider *fd_provider;
260 device_t dev;
261 struct bio_queue_head fd_bq;
262 bool gone;
263 };
264
265 #define FD_NOT_VALID -2
266
267 static driver_intr_t fdc_intr;
268 static driver_filter_t fdc_intr_fast;
269 static void fdc_reset(struct fdc_data *);
270 static int fd_probe_disk(struct fd_data *, int *);
271
272 static SYSCTL_NODE(_debug, OID_AUTO, fdc, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
273 "fdc driver");
274
275 static int fifo_threshold = 8;
276 SYSCTL_INT(_debug_fdc, OID_AUTO, fifo, CTLFLAG_RW, &fifo_threshold, 0,
277 "FIFO threshold setting");
278
279 static int debugflags = 0;
280 SYSCTL_INT(_debug_fdc, OID_AUTO, debugflags, CTLFLAG_RW, &debugflags, 0,
281 "Debug flags");
282
283 static int retries = 10;
284 SYSCTL_INT(_debug_fdc, OID_AUTO, retries, CTLFLAG_RW, &retries, 0,
285 "Number of retries to attempt");
286
287 static int spec1 = NE7_SPEC_1(6, 240);
288 SYSCTL_INT(_debug_fdc, OID_AUTO, spec1, CTLFLAG_RW, &spec1, 0,
289 "Specification byte one (step-rate + head unload)");
290
291 static int spec2 = NE7_SPEC_2(16, 0);
292 SYSCTL_INT(_debug_fdc, OID_AUTO, spec2, CTLFLAG_RW, &spec2, 0,
293 "Specification byte two (head load time + no-dma)");
294
295 static int settle;
296 SYSCTL_INT(_debug_fdc, OID_AUTO, settle, CTLFLAG_RW, &settle, 0,
297 "Head settling time in sec/hz");
298
299 static void
fdprinttype(struct fd_type * ft)300 fdprinttype(struct fd_type *ft)
301 {
302
303 printf("(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,0x%x)",
304 ft->sectrac, ft->secsize, ft->datalen, ft->gap, ft->tracks,
305 ft->size, ft->trans, ft->heads, ft->f_gap, ft->f_inter,
306 ft->offset_side2, ft->flags);
307 }
308
309 static void
fdsettype(struct fd_data * fd,struct fd_type * ft)310 fdsettype(struct fd_data *fd, struct fd_type *ft)
311 {
312 fd->ft = ft;
313 ft->size = ft->sectrac * ft->heads * ft->tracks;
314 fd->sectorsize = 128 << fd->ft->secsize;
315 }
316
317 /*
318 * Bus space handling (access to low-level IO).
319 */
320 static inline void
fdregwr(struct fdc_data * fdc,int reg,uint8_t v)321 fdregwr(struct fdc_data *fdc, int reg, uint8_t v)
322 {
323
324 bus_space_write_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg], v);
325 }
326
327 static inline uint8_t
fdregrd(struct fdc_data * fdc,int reg)328 fdregrd(struct fdc_data *fdc, int reg)
329 {
330
331 return bus_space_read_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg]);
332 }
333
334 static void
fdctl_wr(struct fdc_data * fdc,u_int8_t v)335 fdctl_wr(struct fdc_data *fdc, u_int8_t v)
336 {
337
338 fdregwr(fdc, FDCTL, v);
339 }
340
341 static void
fdout_wr(struct fdc_data * fdc,u_int8_t v)342 fdout_wr(struct fdc_data *fdc, u_int8_t v)
343 {
344
345 fdregwr(fdc, FDOUT, v);
346 }
347
348 static u_int8_t
fdsts_rd(struct fdc_data * fdc)349 fdsts_rd(struct fdc_data *fdc)
350 {
351
352 return fdregrd(fdc, FDSTS);
353 }
354
355 static void
fddsr_wr(struct fdc_data * fdc,u_int8_t v)356 fddsr_wr(struct fdc_data *fdc, u_int8_t v)
357 {
358
359 fdregwr(fdc, FDDSR, v);
360 }
361
362 static void
fddata_wr(struct fdc_data * fdc,u_int8_t v)363 fddata_wr(struct fdc_data *fdc, u_int8_t v)
364 {
365
366 fdregwr(fdc, FDDATA, v);
367 }
368
369 static u_int8_t
fddata_rd(struct fdc_data * fdc)370 fddata_rd(struct fdc_data *fdc)
371 {
372
373 return fdregrd(fdc, FDDATA);
374 }
375
376 static u_int8_t
fdin_rd(struct fdc_data * fdc)377 fdin_rd(struct fdc_data *fdc)
378 {
379
380 return fdregrd(fdc, FDCTL);
381 }
382
383 /*
384 * Magic pseudo-DMA initialization for YE FDC. Sets count and
385 * direction.
386 */
387 static void
fdbcdr_wr(struct fdc_data * fdc,int iswrite,uint16_t count)388 fdbcdr_wr(struct fdc_data *fdc, int iswrite, uint16_t count)
389 {
390 fdregwr(fdc, FDBCDR, (count - 1) & 0xff);
391 fdregwr(fdc, FDBCDR + 1,
392 (iswrite ? 0x80 : 0) | (((count - 1) >> 8) & 0x7f));
393 }
394
395 static int
fdc_err(struct fdc_data * fdc,const char * s)396 fdc_err(struct fdc_data *fdc, const char *s)
397 {
398 fdc->fdc_errs++;
399 if (s) {
400 if (fdc->fdc_errs < FDC_ERRMAX)
401 device_printf(fdc->fdc_dev, "%s", s);
402 else if (fdc->fdc_errs == FDC_ERRMAX)
403 device_printf(fdc->fdc_dev, "too many errors, not "
404 "logging any more\n");
405 }
406
407 return (1);
408 }
409
410 /*
411 * FDC IO functions, take care of the main status register, timeout
412 * in case the desired status bits are never set.
413 *
414 * These PIO loops initially start out with short delays between
415 * each iteration in the expectation that the required condition
416 * is usually met quickly, so it can be handled immediately.
417 */
418 static int
fdc_in(struct fdc_data * fdc,int * ptr)419 fdc_in(struct fdc_data *fdc, int *ptr)
420 {
421 int i, j, step;
422
423 step = 1;
424 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
425 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
426 if (i == (NE7_DIO|NE7_RQM)) {
427 i = fddata_rd(fdc);
428 if (ptr)
429 *ptr = i;
430 return (0);
431 }
432 if (i == NE7_RQM)
433 return (fdc_err(fdc, "ready for output in input\n"));
434 step += step;
435 DELAY(step);
436 }
437 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
438 }
439
440 static int
fdc_out(struct fdc_data * fdc,int x)441 fdc_out(struct fdc_data *fdc, int x)
442 {
443 int i, j, step;
444
445 step = 1;
446 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
447 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
448 if (i == NE7_RQM) {
449 fddata_wr(fdc, x);
450 return (0);
451 }
452 if (i == (NE7_DIO|NE7_RQM))
453 return (fdc_err(fdc, "ready for input in output\n"));
454 step += step;
455 DELAY(step);
456 }
457 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
458 }
459
460 /*
461 * fdc_cmd: Send a command to the chip.
462 * Takes a varargs with this structure:
463 * # of output bytes
464 * output bytes as int [...]
465 * # of input bytes
466 * input bytes as int* [...]
467 */
468 static int
fdc_cmd(struct fdc_data * fdc,int n_out,...)469 fdc_cmd(struct fdc_data *fdc, int n_out, ...)
470 {
471 u_char cmd = 0;
472 int n_in;
473 int n, i;
474 va_list ap;
475
476 va_start(ap, n_out);
477 for (n = 0; n < n_out; n++) {
478 i = va_arg(ap, int);
479 if (n == 0)
480 cmd = i;
481 if (fdc_out(fdc, i) < 0) {
482 char msg[50];
483 snprintf(msg, sizeof(msg),
484 "cmd %x failed at out byte %d of %d\n",
485 cmd, n + 1, n_out);
486 fdc->flags |= FDC_NEEDS_RESET;
487 va_end(ap);
488 return fdc_err(fdc, msg);
489 }
490 }
491 n_in = va_arg(ap, int);
492 for (n = 0; n < n_in; n++) {
493 int *ptr = va_arg(ap, int *);
494 if (fdc_in(fdc, ptr) != 0) {
495 char msg[50];
496 snprintf(msg, sizeof(msg),
497 "cmd %02x failed at in byte %d of %d\n",
498 cmd, n + 1, n_in);
499 fdc->flags |= FDC_NEEDS_RESET;
500 va_end(ap);
501 return fdc_err(fdc, msg);
502 }
503 }
504 va_end(ap);
505 return (0);
506 }
507
508 static void
fdc_reset(struct fdc_data * fdc)509 fdc_reset(struct fdc_data *fdc)
510 {
511 int i, r[10];
512
513 if (fdc->fdct == FDC_ENHANCED) {
514 /* Try a software reset, default precomp, and 500 kb/s */
515 fddsr_wr(fdc, I8207X_DSR_SR);
516 } else {
517 /* Try a hardware reset, keep motor on */
518 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
519 DELAY(100);
520 /* enable FDC, but defer interrupts a moment */
521 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
522 }
523 DELAY(100);
524 fdout_wr(fdc, fdc->fdout);
525
526 /* XXX after a reset, silently believe the FDC will accept commands */
527 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, spec1, spec2, 0))
528 device_printf(fdc->fdc_dev, " SPECIFY failed in reset\n");
529
530 if (fdc->fdct == FDC_ENHANCED) {
531 if (fdc_cmd(fdc, 4,
532 I8207X_CONFIG,
533 0,
534 /* 0x40 | */ /* Enable Implied Seek -
535 * breaks 2step! */
536 0x10 | /* Polling disabled */
537 (fifo_threshold - 1), /* Fifo threshold */
538 0x00, /* Precomp track */
539 0))
540 device_printf(fdc->fdc_dev,
541 " CONFIGURE failed in reset\n");
542 if (debugflags & 1) {
543 if (fdc_cmd(fdc, 1,
544 I8207X_DUMPREG,
545 10, &r[0], &r[1], &r[2], &r[3], &r[4],
546 &r[5], &r[6], &r[7], &r[8], &r[9]))
547 device_printf(fdc->fdc_dev,
548 " DUMPREG failed in reset\n");
549 for (i = 0; i < 10; i++)
550 printf(" %02x", r[i]);
551 printf("\n");
552 }
553 }
554 }
555
556 static int
fdc_sense_drive(struct fdc_data * fdc,int * st3p)557 fdc_sense_drive(struct fdc_data *fdc, int *st3p)
558 {
559 int st3;
560
561 if (fdc_cmd(fdc, 2, NE7CMD_SENSED, fdc->fd->fdsu, 1, &st3))
562 return (fdc_err(fdc, "Sense Drive Status failed\n"));
563 if (st3p)
564 *st3p = st3;
565 return (0);
566 }
567
568 static int
fdc_sense_int(struct fdc_data * fdc,int * st0p,int * cylp)569 fdc_sense_int(struct fdc_data *fdc, int *st0p, int *cylp)
570 {
571 int cyl, st0, ret;
572
573 ret = fdc_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
574 if (ret) {
575 (void)fdc_err(fdc, "sense intr err reading stat reg 0\n");
576 return (ret);
577 }
578
579 if (st0p)
580 *st0p = st0;
581
582 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
583 /*
584 * There doesn't seem to have been an interrupt.
585 */
586 return (FD_NOT_VALID);
587 }
588
589 if (fdc_in(fdc, &cyl) != 0)
590 return fdc_err(fdc, "can't get cyl num\n");
591
592 if (cylp)
593 *cylp = cyl;
594
595 return (0);
596 }
597
598 static int
fdc_read_status(struct fdc_data * fdc)599 fdc_read_status(struct fdc_data *fdc)
600 {
601 int i, ret, status;
602
603 for (i = ret = 0; i < 7; i++) {
604 ret = fdc_in(fdc, &status);
605 fdc->status[i] = status;
606 if (ret != 0)
607 break;
608 }
609
610 if (ret == 0)
611 fdc->flags |= FDC_STAT_VALID;
612 else
613 fdc->flags &= ~FDC_STAT_VALID;
614
615 return ret;
616 }
617
618 /*
619 * Select this drive
620 */
621 static void
fd_select(struct fd_data * fd)622 fd_select(struct fd_data *fd)
623 {
624 struct fdc_data *fdc;
625
626 /* XXX: lock controller */
627 fdc = fd->fdc;
628 fdc->fdout &= ~FDO_FDSEL;
629 fdc->fdout |= FDO_FDMAEN | FDO_FRST | fd->fdsu;
630 fdout_wr(fdc, fdc->fdout);
631 }
632
633 static void
fd_turnon(void * arg)634 fd_turnon(void *arg)
635 {
636 struct fd_data *fd;
637 struct bio *bp;
638 int once;
639
640 fd = arg;
641 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
642 fd->flags &= ~FD_MOTORWAIT;
643 fd->flags |= FD_MOTOR;
644 once = 0;
645 for (;;) {
646 bp = bioq_takefirst(&fd->fd_bq);
647 if (bp == NULL)
648 break;
649 bioq_disksort(&fd->fdc->head, bp);
650 once = 1;
651 }
652 if (once)
653 wakeup(&fd->fdc->head);
654 }
655
656 static void
fd_motor(struct fd_data * fd,int turnon)657 fd_motor(struct fd_data *fd, int turnon)
658 {
659 struct fdc_data *fdc;
660
661 fdc = fd->fdc;
662 /*
663 mtx_assert(&fdc->fdc_mtx, MA_OWNED);
664 */
665 if (turnon) {
666 fd->flags |= FD_MOTORWAIT;
667 fdc->fdout |= (FDO_MOEN0 << fd->fdsu);
668 callout_reset(&fd->toffhandle, hz, fd_turnon, fd);
669 } else {
670 callout_stop(&fd->toffhandle);
671 fd->flags &= ~(FD_MOTOR|FD_MOTORWAIT);
672 fdc->fdout &= ~(FDO_MOEN0 << fd->fdsu);
673 }
674 fdout_wr(fdc, fdc->fdout);
675 }
676
677 static void
fd_turnoff(void * xfd)678 fd_turnoff(void *xfd)
679 {
680 struct fd_data *fd = xfd;
681
682 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
683 fd_motor(fd, 0);
684 }
685
686 /*
687 * fdc_intr - wake up the worker thread.
688 */
689
690 static void
fdc_intr(void * arg)691 fdc_intr(void *arg)
692 {
693
694 wakeup(arg);
695 }
696
697 static int
fdc_intr_fast(void * arg)698 fdc_intr_fast(void *arg)
699 {
700
701 wakeup(arg);
702 return(FILTER_HANDLED);
703 }
704
705 /*
706 * fdc_pio(): perform programmed IO read/write for YE PCMCIA floppy.
707 */
708 static void
fdc_pio(struct fdc_data * fdc)709 fdc_pio(struct fdc_data *fdc)
710 {
711 u_char *cptr;
712 struct bio *bp;
713 u_int count;
714
715 bp = fdc->bp;
716 cptr = fdc->fd->fd_ioptr;
717 count = fdc->fd->fd_iosize;
718
719 if (bp->bio_cmd == BIO_READ) {
720 fdbcdr_wr(fdc, 0, count);
721 bus_space_read_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
722 fdc->ioff[FD_YE_DATAPORT], cptr, count);
723 } else {
724 bus_space_write_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
725 fdc->ioff[FD_YE_DATAPORT], cptr, count);
726 fdbcdr_wr(fdc, 0, count); /* needed? */
727 }
728 }
729
730 static int
fdc_biodone(struct fdc_data * fdc,int error)731 fdc_biodone(struct fdc_data *fdc, int error)
732 {
733 struct fd_data *fd;
734 struct bio *bp;
735
736 fd = fdc->fd;
737 bp = fdc->bp;
738
739 mtx_lock(&fdc->fdc_mtx);
740 if (--fd->fd_iocount == 0)
741 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
742 fdc->bp = NULL;
743 fdc->fd = NULL;
744 mtx_unlock(&fdc->fdc_mtx);
745 if (bp->bio_to != NULL) {
746 if ((debugflags & 2) && fd->fdc->retry > 0)
747 printf("retries: %d\n", fd->fdc->retry);
748 g_io_deliver(bp, error);
749 return (0);
750 }
751 bp->bio_error = error;
752 bp->bio_flags |= BIO_DONE;
753 wakeup(bp);
754 return (0);
755 }
756
757 static int retry_line;
758
759 static int
fdc_worker(struct fdc_data * fdc)760 fdc_worker(struct fdc_data *fdc)
761 {
762 struct fd_data *fd;
763 struct bio *bp;
764 int i, nsect;
765 int st0, st3, cyl, mfm, steptrac, cylinder, descyl, sec;
766 int head;
767 int override_error;
768 static int need_recal;
769 struct fdc_readid *idp;
770 struct fd_formb *finfo;
771
772 override_error = 0;
773
774 /* Have we exhausted our retries ? */
775 bp = fdc->bp;
776 fd = fdc->fd;
777 if (bp != NULL &&
778 (fdc->retry >= retries || (fd->options & FDOPT_NORETRY))) {
779 if ((debugflags & 4))
780 printf("Too many retries (EIO)\n");
781 if (fdc->flags & FDC_NEEDS_RESET) {
782 mtx_lock(&fdc->fdc_mtx);
783 fd->flags |= FD_EMPTY;
784 mtx_unlock(&fdc->fdc_mtx);
785 }
786 return (fdc_biodone(fdc, EIO));
787 }
788
789 /* Disable ISADMA if we bailed while it was active */
790 if (fd != NULL && (fd->flags & FD_ISADMA)) {
791 isa_dmadone(
792 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
793 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
794 mtx_lock(&fdc->fdc_mtx);
795 fd->flags &= ~FD_ISADMA;
796 mtx_unlock(&fdc->fdc_mtx);
797 }
798
799 /* Unwedge the controller ? */
800 if (fdc->flags & FDC_NEEDS_RESET) {
801 fdc->flags &= ~FDC_NEEDS_RESET;
802 fdc_reset(fdc);
803 if (cold)
804 DELAY(1000000);
805 else
806 tsleep(fdc, PRIBIO, "fdcrst", hz);
807 /* Discard results */
808 for (i = 0; i < 4; i++)
809 fdc_sense_int(fdc, &st0, &cyl);
810 /* All drives must recal */
811 need_recal = 0xf;
812 }
813
814 /* Pick up a request, if need be wait for it */
815 if (fdc->bp == NULL) {
816 mtx_lock(&fdc->fdc_mtx);
817 do {
818 fdc->bp = bioq_takefirst(&fdc->head);
819 if (fdc->bp == NULL)
820 msleep(&fdc->head, &fdc->fdc_mtx,
821 PRIBIO, "-", 0);
822 } while (fdc->bp == NULL &&
823 (fdc->flags & FDC_KTHREAD_EXIT) == 0);
824 mtx_unlock(&fdc->fdc_mtx);
825
826 if (fdc->bp == NULL)
827 /*
828 * Nothing to do, worker thread has been
829 * requested to stop.
830 */
831 return (0);
832
833 bp = fdc->bp;
834 fd = fdc->fd = bp->bio_driver1;
835 fdc->retry = 0;
836 fd->fd_ioptr = bp->bio_data;
837 if (bp->bio_cmd == BIO_FMT) {
838 i = offsetof(struct fd_formb, fd_formb_cylno(0));
839 fd->fd_ioptr += i;
840 fd->fd_iosize = bp->bio_length - i;
841 }
842 }
843
844 /* Select drive, setup params */
845 fd_select(fd);
846 if (fdc->fdct == FDC_ENHANCED)
847 fddsr_wr(fdc, fd->ft->trans);
848 else
849 fdctl_wr(fdc, fd->ft->trans);
850
851 if (bp->bio_cmd == BIO_PROBE) {
852 if ((!(device_get_flags(fd->dev) & FD_NO_CHLINE) &&
853 !(fdin_rd(fdc) & FDI_DCHG) &&
854 !(fd->flags & FD_EMPTY)) ||
855 fd_probe_disk(fd, &need_recal) == 0)
856 return (fdc_biodone(fdc, 0));
857 return (1);
858 }
859
860 /*
861 * If we are dead just flush the requests
862 */
863 if (fd->flags & FD_EMPTY)
864 return (fdc_biodone(fdc, ENXIO));
865
866 /* Check if we lost our media */
867 if (fdin_rd(fdc) & FDI_DCHG) {
868 if (debugflags & 0x40)
869 printf("Lost disk\n");
870 mtx_lock(&fdc->fdc_mtx);
871 fd->flags |= FD_EMPTY;
872 fd->flags |= FD_NEWDISK;
873 mtx_unlock(&fdc->fdc_mtx);
874 g_topology_lock();
875 g_orphan_provider(fd->fd_provider, ENXIO);
876 fd->fd_provider->flags |= G_PF_WITHER;
877 fd->fd_provider =
878 g_new_providerf(fd->fd_geom, "%s", fd->fd_geom->name);
879 g_error_provider(fd->fd_provider, 0);
880 g_topology_unlock();
881 return (fdc_biodone(fdc, ENXIO));
882 }
883
884 /* Check if the floppy is write-protected */
885 if (bp->bio_cmd == BIO_FMT || bp->bio_cmd == BIO_WRITE) {
886 retry_line = __LINE__;
887 if(fdc_sense_drive(fdc, &st3) != 0)
888 return (1);
889 if(st3 & NE7_ST3_WP)
890 return (fdc_biodone(fdc, EROFS));
891 }
892
893 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0;
894 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1;
895 i = fd->ft->sectrac * fd->ft->heads;
896 cylinder = bp->bio_pblkno / i;
897 descyl = cylinder * steptrac;
898 sec = bp->bio_pblkno % i;
899 nsect = i - sec;
900 head = sec / fd->ft->sectrac;
901 sec = sec % fd->ft->sectrac + 1;
902
903 /* If everything is going swimmingly, use multisector xfer */
904 if (fdc->retry == 0 &&
905 (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE)) {
906 fd->fd_iosize = imin(nsect * fd->sectorsize, bp->bio_resid);
907 nsect = fd->fd_iosize / fd->sectorsize;
908 } else if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) {
909 fd->fd_iosize = fd->sectorsize;
910 nsect = 1;
911 }
912
913 /* Do RECAL if we need to or are going to track zero anyway */
914 if ((need_recal & (1 << fd->fdsu)) ||
915 (cylinder == 0 && fd->track != 0) ||
916 fdc->retry > 2) {
917 retry_line = __LINE__;
918 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
919 return (1);
920 tsleep(fdc, PRIBIO, "fdrecal", hz);
921 retry_line = __LINE__;
922 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
923 return (1); /* XXX */
924 retry_line = __LINE__;
925 if ((st0 & 0xc0) || cyl != 0)
926 return (1);
927 need_recal &= ~(1 << fd->fdsu);
928 fd->track = 0;
929 /* let the heads settle */
930 if (settle)
931 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
932 }
933
934 /*
935 * SEEK to where we want to be
936 */
937 if (cylinder != fd->track) {
938 retry_line = __LINE__;
939 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, descyl, 0))
940 return (1);
941 tsleep(fdc, PRIBIO, "fdseek", hz);
942 retry_line = __LINE__;
943 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
944 return (1); /* XXX */
945 retry_line = __LINE__;
946 if ((st0 & 0xc0) || cyl != descyl) {
947 need_recal |= (1 << fd->fdsu);
948 return (1);
949 }
950 /* let the heads settle */
951 if (settle)
952 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
953 }
954 fd->track = cylinder;
955
956 if (debugflags & 8)
957 printf("op %x bn %ju siz %u ptr %p retry %d\n",
958 bp->bio_cmd, bp->bio_pblkno, fd->fd_iosize,
959 fd->fd_ioptr, fdc->retry);
960
961 /* Setup ISADMA if we need it and have it */
962 if ((bp->bio_cmd == BIO_READ ||
963 bp->bio_cmd == BIO_WRITE ||
964 bp->bio_cmd == BIO_FMT)
965 && !(fdc->flags & FDC_NODMA)) {
966 isa_dmastart(
967 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
968 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
969 mtx_lock(&fdc->fdc_mtx);
970 fd->flags |= FD_ISADMA;
971 mtx_unlock(&fdc->fdc_mtx);
972 }
973
974 /* Do PIO if we have to */
975 if (fdc->flags & FDC_NODMA) {
976 if (bp->bio_cmd == BIO_READ ||
977 bp->bio_cmd == BIO_WRITE ||
978 bp->bio_cmd == BIO_FMT)
979 fdbcdr_wr(fdc, 1, fd->fd_iosize);
980 if (bp->bio_cmd == BIO_WRITE ||
981 bp->bio_cmd == BIO_FMT)
982 fdc_pio(fdc);
983 }
984
985 switch(bp->bio_cmd) {
986 case BIO_FMT:
987 /* formatting */
988 finfo = (struct fd_formb *)bp->bio_data;
989 retry_line = __LINE__;
990 if (fdc_cmd(fdc, 6,
991 NE7CMD_FORMAT | mfm,
992 head << 2 | fd->fdsu,
993 finfo->fd_formb_secshift,
994 finfo->fd_formb_nsecs,
995 finfo->fd_formb_gaplen,
996 finfo->fd_formb_fillbyte, 0))
997 return (1);
998 break;
999 case BIO_RDID:
1000 retry_line = __LINE__;
1001 if (fdc_cmd(fdc, 2,
1002 NE7CMD_READID | mfm,
1003 head << 2 | fd->fdsu, 0))
1004 return (1);
1005 break;
1006 case BIO_READ:
1007 retry_line = __LINE__;
1008 if (fdc_cmd(fdc, 9,
1009 NE7CMD_READ | NE7CMD_SK | mfm | NE7CMD_MT,
1010 head << 2 | fd->fdsu, /* head & unit */
1011 fd->track, /* track */
1012 head, /* head */
1013 sec, /* sector + 1 */
1014 fd->ft->secsize, /* sector size */
1015 fd->ft->sectrac, /* sectors/track */
1016 fd->ft->gap, /* gap size */
1017 fd->ft->datalen, /* data length */
1018 0))
1019 return (1);
1020 break;
1021 case BIO_WRITE:
1022 retry_line = __LINE__;
1023 if (fdc_cmd(fdc, 9,
1024 NE7CMD_WRITE | mfm | NE7CMD_MT,
1025 head << 2 | fd->fdsu, /* head & unit */
1026 fd->track, /* track */
1027 head, /* head */
1028 sec, /* sector + 1 */
1029 fd->ft->secsize, /* sector size */
1030 fd->ft->sectrac, /* sectors/track */
1031 fd->ft->gap, /* gap size */
1032 fd->ft->datalen, /* data length */
1033 0))
1034 return (1);
1035 break;
1036 default:
1037 KASSERT(0 == 1, ("Wrong bio_cmd %x\n", bp->bio_cmd));
1038 }
1039
1040 /* Wait for interrupt */
1041 i = tsleep(fdc, PRIBIO, "fddata", hz);
1042
1043 /* PIO if the read looks good */
1044 if (i == 0 && (fdc->flags & FDC_NODMA) && (bp->bio_cmd == BIO_READ))
1045 fdc_pio(fdc);
1046
1047 /* Finish DMA */
1048 if (fd->flags & FD_ISADMA) {
1049 isa_dmadone(
1050 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
1051 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
1052 mtx_lock(&fdc->fdc_mtx);
1053 fd->flags &= ~FD_ISADMA;
1054 mtx_unlock(&fdc->fdc_mtx);
1055 }
1056
1057 if (i != 0) {
1058 /*
1059 * Timeout.
1060 *
1061 * Due to IBM's brain-dead design, the FDC has a faked ready
1062 * signal, hardwired to ready == true. Thus, any command
1063 * issued if there's no diskette in the drive will _never_
1064 * complete, and must be aborted by resetting the FDC.
1065 * Many thanks, Big Blue!
1066 */
1067 retry_line = __LINE__;
1068 fdc->flags |= FDC_NEEDS_RESET;
1069 return (1);
1070 }
1071
1072 retry_line = __LINE__;
1073 if (fdc_read_status(fdc))
1074 return (1);
1075
1076 if (debugflags & 0x10)
1077 printf(" -> %x %x %x %x\n",
1078 fdc->status[0], fdc->status[1],
1079 fdc->status[2], fdc->status[3]);
1080
1081 st0 = fdc->status[0] & NE7_ST0_IC;
1082 if (st0 != 0) {
1083 retry_line = __LINE__;
1084 if (st0 == NE7_ST0_IC_AT && fdc->status[1] & NE7_ST1_OR) {
1085 /*
1086 * DMA overrun. Someone hogged the bus and
1087 * didn't release it in time for the next
1088 * FDC transfer.
1089 */
1090 return (1);
1091 }
1092 retry_line = __LINE__;
1093 if(st0 == NE7_ST0_IC_IV) {
1094 fdc->flags |= FDC_NEEDS_RESET;
1095 return (1);
1096 }
1097 retry_line = __LINE__;
1098 if(st0 == NE7_ST0_IC_AT && fdc->status[2] & NE7_ST2_WC) {
1099 need_recal |= (1 << fd->fdsu);
1100 return (1);
1101 }
1102 if (debugflags & 0x20) {
1103 printf("status %02x %02x %02x %02x %02x %02x\n",
1104 fdc->status[0], fdc->status[1], fdc->status[2],
1105 fdc->status[3], fdc->status[4], fdc->status[5]);
1106 }
1107 retry_line = __LINE__;
1108 if (fd->options & FDOPT_NOERROR)
1109 override_error = 1;
1110 else
1111 return (1);
1112 }
1113 /* All OK */
1114 switch(bp->bio_cmd) {
1115 case BIO_RDID:
1116 /* copy out ID field contents */
1117 idp = (struct fdc_readid *)bp->bio_data;
1118 idp->cyl = fdc->status[3];
1119 idp->head = fdc->status[4];
1120 idp->sec = fdc->status[5];
1121 idp->secshift = fdc->status[6];
1122 if (debugflags & 0x40)
1123 printf("c %d h %d s %d z %d\n",
1124 idp->cyl, idp->head, idp->sec, idp->secshift);
1125 break;
1126 case BIO_READ:
1127 case BIO_WRITE:
1128 bp->bio_pblkno += nsect;
1129 bp->bio_resid -= fd->fd_iosize;
1130 bp->bio_completed += fd->fd_iosize;
1131 fd->fd_ioptr += fd->fd_iosize;
1132 if (override_error) {
1133 if ((debugflags & 4))
1134 printf("FDOPT_NOERROR: returning bad data\n");
1135 } else {
1136 /* Since we managed to get something done,
1137 * reset the retry */
1138 fdc->retry = 0;
1139 if (bp->bio_resid > 0)
1140 return (0);
1141 }
1142 break;
1143 case BIO_FMT:
1144 break;
1145 }
1146 return (fdc_biodone(fdc, 0));
1147 }
1148
1149 static void
fdc_thread(void * arg)1150 fdc_thread(void *arg)
1151 {
1152 struct fdc_data *fdc;
1153
1154 fdc = arg;
1155 int i;
1156
1157 mtx_lock(&fdc->fdc_mtx);
1158 fdc->flags |= FDC_KTHREAD_ALIVE;
1159 while ((fdc->flags & FDC_KTHREAD_EXIT) == 0) {
1160 mtx_unlock(&fdc->fdc_mtx);
1161 i = fdc_worker(fdc);
1162 if (i && debugflags & 0x20) {
1163 if (fdc->bp != NULL)
1164 g_print_bio("", fdc->bp, "");
1165 printf("Retry line %d\n", retry_line);
1166 }
1167 fdc->retry += i;
1168 mtx_lock(&fdc->fdc_mtx);
1169 }
1170 fdc->flags &= ~(FDC_KTHREAD_EXIT | FDC_KTHREAD_ALIVE);
1171 mtx_unlock(&fdc->fdc_mtx);
1172
1173 kproc_exit(0);
1174 }
1175
1176 /*
1177 * Enqueue a request.
1178 */
1179 static void
fd_enqueue(struct fd_data * fd,struct bio * bp)1180 fd_enqueue(struct fd_data *fd, struct bio *bp)
1181 {
1182 struct fdc_data *fdc;
1183
1184 fdc = fd->fdc;
1185 mtx_lock(&fdc->fdc_mtx);
1186 /* If we go from idle, cancel motor turnoff */
1187 if (fd->fd_iocount++ == 0)
1188 callout_stop(&fd->toffhandle);
1189 if (fd->flags & FD_MOTOR) {
1190 /* The motor is on, send it directly to the controller */
1191 bioq_disksort(&fdc->head, bp);
1192 wakeup(&fdc->head);
1193 } else {
1194 /* Queue it on the drive until the motor has started */
1195 bioq_insert_tail(&fd->fd_bq, bp);
1196 if (!(fd->flags & FD_MOTORWAIT))
1197 fd_motor(fd, 1);
1198 }
1199 mtx_unlock(&fdc->fdc_mtx);
1200 }
1201
1202 /*
1203 * Try to find out if we have a disk in the drive.
1204 */
1205 static int
fd_probe_disk(struct fd_data * fd,int * recal)1206 fd_probe_disk(struct fd_data *fd, int *recal)
1207 {
1208 struct fdc_data *fdc;
1209 int st0, st3, cyl;
1210 int oopts, ret;
1211
1212 fdc = fd->fdc;
1213 oopts = fd->options;
1214 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1215 ret = 1;
1216
1217 /*
1218 * First recal, then seek to cyl#1, this clears the old condition on
1219 * the disk change line so we can examine it for current status.
1220 */
1221 if (debugflags & 0x40)
1222 printf("New disk in probe\n");
1223 mtx_lock(&fdc->fdc_mtx);
1224 fd->flags |= FD_NEWDISK;
1225 mtx_unlock(&fdc->fdc_mtx);
1226 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
1227 goto done;
1228 tsleep(fdc, PRIBIO, "fdrecal", hz);
1229 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1230 goto done; /* XXX */
1231 if ((st0 & 0xc0) || cyl != 0)
1232 goto done;
1233
1234 /* Seek to track 1 */
1235 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, 1, 0))
1236 goto done;
1237 tsleep(fdc, PRIBIO, "fdseek", hz);
1238 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1239 goto done; /* XXX */
1240 *recal |= (1 << fd->fdsu);
1241 if (fdin_rd(fdc) & FDI_DCHG) {
1242 if (debugflags & 0x40)
1243 printf("Empty in probe\n");
1244 mtx_lock(&fdc->fdc_mtx);
1245 fd->flags |= FD_EMPTY;
1246 mtx_unlock(&fdc->fdc_mtx);
1247 } else {
1248 if (fdc_sense_drive(fdc, &st3) != 0)
1249 goto done;
1250 if (debugflags & 0x40)
1251 printf("Got disk in probe\n");
1252 mtx_lock(&fdc->fdc_mtx);
1253 fd->flags &= ~FD_EMPTY;
1254 if (st3 & NE7_ST3_WP)
1255 fd->flags |= FD_WP;
1256 else
1257 fd->flags &= ~FD_WP;
1258 mtx_unlock(&fdc->fdc_mtx);
1259 }
1260 ret = 0;
1261
1262 done:
1263 fd->options = oopts;
1264 return (ret);
1265 }
1266
1267 static int
fdmisccmd(struct fd_data * fd,u_int cmd,void * data)1268 fdmisccmd(struct fd_data *fd, u_int cmd, void *data)
1269 {
1270 struct bio *bp;
1271 struct fd_formb *finfo;
1272 struct fdc_readid *idfield;
1273 int error;
1274
1275 bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO);
1276
1277 /*
1278 * Set up a bio request for fdstrategy(). bio_offset is faked
1279 * so that fdstrategy() will seek to the requested
1280 * cylinder, and use the desired head.
1281 */
1282 bp->bio_cmd = cmd;
1283 if (cmd == BIO_FMT) {
1284 finfo = (struct fd_formb *)data;
1285 bp->bio_pblkno =
1286 (finfo->cyl * fd->ft->heads + finfo->head) *
1287 fd->ft->sectrac;
1288 bp->bio_length = sizeof *finfo;
1289 } else if (cmd == BIO_RDID) {
1290 idfield = (struct fdc_readid *)data;
1291 bp->bio_pblkno =
1292 (idfield->cyl * fd->ft->heads + idfield->head) *
1293 fd->ft->sectrac;
1294 bp->bio_length = sizeof(struct fdc_readid);
1295 } else if (cmd == BIO_PROBE) {
1296 /* nothing */
1297 } else
1298 panic("wrong cmd in fdmisccmd()");
1299 bp->bio_offset = bp->bio_pblkno * fd->sectorsize;
1300 bp->bio_data = data;
1301 bp->bio_driver1 = fd;
1302 bp->bio_flags = 0;
1303
1304 fd_enqueue(fd, bp);
1305
1306 do {
1307 tsleep(bp, PRIBIO, "fdwait", hz);
1308 } while (!(bp->bio_flags & BIO_DONE));
1309 error = bp->bio_error;
1310
1311 free(bp, M_TEMP);
1312 return (error);
1313 }
1314
1315 /*
1316 * Try figuring out the density of the media present in our device.
1317 */
1318 static int
fdautoselect(struct fd_data * fd)1319 fdautoselect(struct fd_data *fd)
1320 {
1321 struct fd_type *fdtp;
1322 struct fdc_readid id;
1323 int oopts, rv;
1324
1325 if (!(fd->ft->flags & FL_AUTO))
1326 return (0);
1327
1328 fdtp = fd_native_types[fd->type];
1329 fdsettype(fd, fdtp);
1330 if (!(fd->ft->flags & FL_AUTO))
1331 return (0);
1332
1333 /*
1334 * Try reading sector ID fields, first at cylinder 0, head 0,
1335 * then at cylinder 2, head N. We don't probe cylinder 1,
1336 * since for 5.25in DD media in a HD drive, there are no data
1337 * to read (2 step pulses per media cylinder required). For
1338 * two-sided media, the second probe always goes to head 1, so
1339 * we can tell them apart from single-sided media. As a
1340 * side-effect this means that single-sided media should be
1341 * mentioned in the search list after two-sided media of an
1342 * otherwise identical density. Media with a different number
1343 * of sectors per track but otherwise identical parameters
1344 * cannot be distinguished at all.
1345 *
1346 * If we successfully read an ID field on both cylinders where
1347 * the recorded values match our expectation, we are done.
1348 * Otherwise, we try the next density entry from the table.
1349 *
1350 * Stepping to cylinder 2 has the side-effect of clearing the
1351 * unit attention bit.
1352 */
1353 oopts = fd->options;
1354 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1355 for (; fdtp->heads; fdtp++) {
1356 fdsettype(fd, fdtp);
1357
1358 id.cyl = id.head = 0;
1359 rv = fdmisccmd(fd, BIO_RDID, &id);
1360 if (rv != 0)
1361 continue;
1362 if (id.cyl != 0 || id.head != 0 || id.secshift != fdtp->secsize)
1363 continue;
1364 id.cyl = 2;
1365 id.head = fd->ft->heads - 1;
1366 rv = fdmisccmd(fd, BIO_RDID, &id);
1367 if (id.cyl != 2 || id.head != fdtp->heads - 1 ||
1368 id.secshift != fdtp->secsize)
1369 continue;
1370 if (rv == 0)
1371 break;
1372 }
1373
1374 fd->options = oopts;
1375 if (fdtp->heads == 0) {
1376 if (debugflags & 0x40)
1377 device_printf(fd->dev, "autoselection failed\n");
1378 fdsettype(fd, fd_native_types[fd->type]);
1379 return (-1);
1380 } else {
1381 if (debugflags & 0x40) {
1382 device_printf(fd->dev,
1383 "autoselected %d KB medium\n",
1384 fd->ft->size / 2);
1385 fdprinttype(fd->ft);
1386 }
1387 return (0);
1388 }
1389 }
1390
1391 /*
1392 * GEOM class implementation
1393 */
1394
1395 static g_access_t fd_access;
1396 static g_start_t fd_start;
1397 static g_ioctl_t fd_ioctl;
1398 static g_provgone_t fd_providergone;
1399
1400 struct g_class g_fd_class = {
1401 .name = "FD",
1402 .version = G_VERSION,
1403 .start = fd_start,
1404 .access = fd_access,
1405 .ioctl = fd_ioctl,
1406 .providergone = fd_providergone,
1407 };
1408
1409 static int
fd_access(struct g_provider * pp,int r,int w,int e)1410 fd_access(struct g_provider *pp, int r, int w, int e)
1411 {
1412 struct fd_data *fd;
1413 struct fdc_data *fdc;
1414 int ar, aw, ae;
1415
1416 fd = pp->geom->softc;
1417 fdc = fd->fdc;
1418
1419 /*
1420 * If our provider is withering, we can only get negative requests
1421 * and we don't want to even see them
1422 */
1423 if (pp->flags & G_PF_WITHER)
1424 return (0);
1425
1426 ar = r + pp->acr;
1427 aw = w + pp->acw;
1428 ae = e + pp->ace;
1429
1430 if (ar == 0 && aw == 0 && ae == 0) {
1431 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR);
1432 return (0);
1433 }
1434
1435 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) {
1436 if (fdmisccmd(fd, BIO_PROBE, NULL))
1437 return (ENXIO);
1438 if (fd->flags & FD_EMPTY)
1439 return (ENXIO);
1440 if (fd->flags & FD_NEWDISK) {
1441 if (fdautoselect(fd) != 0 &&
1442 (device_get_flags(fd->dev) & FD_NO_CHLINE)) {
1443 mtx_lock(&fdc->fdc_mtx);
1444 fd->flags |= FD_EMPTY;
1445 mtx_unlock(&fdc->fdc_mtx);
1446 return (ENXIO);
1447 }
1448 mtx_lock(&fdc->fdc_mtx);
1449 fd->flags &= ~FD_NEWDISK;
1450 mtx_unlock(&fdc->fdc_mtx);
1451 }
1452 }
1453
1454 if (w > 0 && (fd->flags & FD_WP)) {
1455 return (EROFS);
1456 }
1457
1458 pp->sectorsize = fd->sectorsize;
1459 pp->stripesize = fd->ft->heads * fd->ft->sectrac * fd->sectorsize;
1460 pp->mediasize = pp->stripesize * fd->ft->tracks;
1461 return (0);
1462 }
1463
1464 static void
fd_start(struct bio * bp)1465 fd_start(struct bio *bp)
1466 {
1467 struct fd_data * fd;
1468
1469 fd = bp->bio_to->geom->softc;
1470 bp->bio_driver1 = fd;
1471 if (bp->bio_cmd == BIO_GETATTR) {
1472 if (g_handleattr_int(bp, "GEOM::fwsectors", fd->ft->sectrac))
1473 return;
1474 if (g_handleattr_int(bp, "GEOM::fwheads", fd->ft->heads))
1475 return;
1476 g_io_deliver(bp, ENOIOCTL);
1477 return;
1478 }
1479 if (!(bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE)) {
1480 g_io_deliver(bp, EOPNOTSUPP);
1481 return;
1482 }
1483 bp->bio_pblkno = bp->bio_offset / fd->sectorsize;
1484 bp->bio_resid = bp->bio_length;
1485 fd_enqueue(fd, bp);
1486 return;
1487 }
1488
1489 static int
fd_ioctl(struct g_provider * pp,u_long cmd,void * data,int fflag,struct thread * td)1490 fd_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td)
1491 {
1492 struct fd_data *fd;
1493 struct fdc_status *fsp;
1494 struct fdc_readid *rid;
1495 int error;
1496
1497 fd = pp->geom->softc;
1498
1499 switch (cmd) {
1500 case FD_GTYPE: /* get drive type */
1501 *(struct fd_type *)data = *fd->ft;
1502 return (0);
1503
1504 case FD_STYPE: /* set drive type */
1505 /*
1506 * Allow setting drive type temporarily iff
1507 * currently unset. Used for fdformat so any
1508 * user can set it, and then start formatting.
1509 */
1510 fd->fts = *(struct fd_type *)data;
1511 if (fd->fts.sectrac) {
1512 /* XXX: check for rubbish */
1513 fdsettype(fd, &fd->fts);
1514 } else {
1515 fdsettype(fd, fd_native_types[fd->type]);
1516 }
1517 if (debugflags & 0x40)
1518 fdprinttype(fd->ft);
1519 return (0);
1520
1521 case FD_GOPTS: /* get drive options */
1522 *(int *)data = fd->options;
1523 return (0);
1524
1525 case FD_SOPTS: /* set drive options */
1526 fd->options = *(int *)data;
1527 return (0);
1528
1529 case FD_CLRERR:
1530 error = priv_check(td, PRIV_DRIVER);
1531 if (error)
1532 return (error);
1533 fd->fdc->fdc_errs = 0;
1534 return (0);
1535
1536 case FD_GSTAT:
1537 fsp = (struct fdc_status *)data;
1538 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
1539 return (EINVAL);
1540 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
1541 return (0);
1542
1543 case FD_GDTYPE:
1544 *(enum fd_drivetype *)data = fd->type;
1545 return (0);
1546
1547 case FD_FORM:
1548 if (!(fflag & FWRITE))
1549 return (EPERM);
1550 if (((struct fd_formb *)data)->format_version !=
1551 FD_FORMAT_VERSION)
1552 return (EINVAL); /* wrong version of formatting prog */
1553 error = fdmisccmd(fd, BIO_FMT, data);
1554 mtx_lock(&fd->fdc->fdc_mtx);
1555 fd->flags |= FD_NEWDISK;
1556 mtx_unlock(&fd->fdc->fdc_mtx);
1557 break;
1558
1559 case FD_READID:
1560 rid = (struct fdc_readid *)data;
1561 if (rid->cyl > 85 || rid->head > 1)
1562 return (EINVAL);
1563 error = fdmisccmd(fd, BIO_RDID, data);
1564 break;
1565
1566 case FIONBIO:
1567 case FIOASYNC:
1568 /* For backwards compat with old fd*(8) tools */
1569 error = 0;
1570 break;
1571
1572 default:
1573 if (debugflags & 0x80)
1574 printf("Unknown ioctl %lx\n", cmd);
1575 error = ENOIOCTL;
1576 break;
1577 }
1578 return (error);
1579 };
1580
1581 /*
1582 * Configuration/initialization stuff, per controller.
1583 */
1584 struct fdc_ivars {
1585 int fdunit;
1586 int fdtype;
1587 };
1588
1589 void
fdc_release_resources(struct fdc_data * fdc)1590 fdc_release_resources(struct fdc_data *fdc)
1591 {
1592 device_t dev;
1593 struct resource *last;
1594 int i;
1595
1596 dev = fdc->fdc_dev;
1597 if (fdc->fdc_intr)
1598 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1599 fdc->fdc_intr = NULL;
1600 if (fdc->res_irq != NULL)
1601 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
1602 fdc->res_irq);
1603 fdc->res_irq = NULL;
1604 last = NULL;
1605 for (i = 0; i < FDC_MAXREG; i++) {
1606 if (fdc->resio[i] != NULL && fdc->resio[i] != last) {
1607 bus_release_resource(dev, SYS_RES_IOPORT,
1608 fdc->ridio[i], fdc->resio[i]);
1609 last = fdc->resio[i];
1610 fdc->resio[i] = NULL;
1611 }
1612 }
1613 if (fdc->res_drq != NULL)
1614 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
1615 fdc->res_drq);
1616 fdc->res_drq = NULL;
1617 }
1618
1619 int
fdc_read_ivar(device_t dev,device_t child,int which,uintptr_t * result)1620 fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
1621 {
1622 struct fdc_ivars *ivars = device_get_ivars(child);
1623
1624 switch (which) {
1625 case FDC_IVAR_FDUNIT:
1626 *result = ivars->fdunit;
1627 break;
1628 case FDC_IVAR_FDTYPE:
1629 *result = ivars->fdtype;
1630 break;
1631 default:
1632 return (ENOENT);
1633 }
1634 return (0);
1635 }
1636
1637 int
fdc_write_ivar(device_t dev,device_t child,int which,uintptr_t value)1638 fdc_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
1639 {
1640 struct fdc_ivars *ivars = device_get_ivars(child);
1641
1642 switch (which) {
1643 case FDC_IVAR_FDUNIT:
1644 ivars->fdunit = value;
1645 break;
1646 case FDC_IVAR_FDTYPE:
1647 ivars->fdtype = value;
1648 break;
1649 default:
1650 return (ENOENT);
1651 }
1652 return (0);
1653 }
1654
1655 int
fdc_initial_reset(device_t dev,struct fdc_data * fdc)1656 fdc_initial_reset(device_t dev, struct fdc_data *fdc)
1657 {
1658 int ic_type, part_id;
1659
1660 /*
1661 * A status value of 0xff is very unlikely, but not theoretically
1662 * impossible, but it is far more likely to indicate an empty bus.
1663 */
1664 if (fdsts_rd(fdc) == 0xff)
1665 return (ENXIO);
1666
1667 /*
1668 * Assert a reset to the floppy controller and check that the status
1669 * register goes to zero.
1670 */
1671 fdout_wr(fdc, 0);
1672 fdout_wr(fdc, 0);
1673 if (fdsts_rd(fdc) != 0)
1674 return (ENXIO);
1675
1676 /*
1677 * Clear the reset and see it come ready.
1678 */
1679 fdout_wr(fdc, FDO_FRST);
1680 DELAY(100);
1681 if (fdsts_rd(fdc) != 0x80)
1682 return (ENXIO);
1683
1684 /* Then, see if it can handle a command. */
1685 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(6, 240),
1686 NE7_SPEC_2(31, 0), 0))
1687 return (ENXIO);
1688
1689 /*
1690 * Try to identify the chip.
1691 *
1692 * The i8272 datasheet documents that unknown commands
1693 * will return ST0 as 0x80. The i8272 is supposedly identical
1694 * to the NEC765.
1695 * The i82077SL datasheet says 0x90 for the VERSION command,
1696 * and several "superio" chips emulate this.
1697 */
1698 if (fdc_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type))
1699 return (ENXIO);
1700 if (fdc_cmd(fdc, 1, 0x18, 1, &part_id))
1701 return (ENXIO);
1702 if (bootverbose)
1703 device_printf(dev,
1704 "ic_type %02x part_id %02x\n", ic_type, part_id);
1705 switch (ic_type & 0xff) {
1706 case 0x80:
1707 device_set_desc(dev, "NEC 765 or clone");
1708 fdc->fdct = FDC_NE765;
1709 break;
1710 case 0x81:
1711 case 0x90:
1712 device_set_desc(dev,
1713 "Enhanced floppy controller");
1714 fdc->fdct = FDC_ENHANCED;
1715 break;
1716 default:
1717 device_set_desc(dev, "Generic floppy controller");
1718 fdc->fdct = FDC_UNKNOWN;
1719 break;
1720 }
1721 return (0);
1722 }
1723
1724 int
fdc_detach(device_t dev)1725 fdc_detach(device_t dev)
1726 {
1727 struct fdc_data *fdc;
1728 int error;
1729
1730 fdc = device_get_softc(dev);
1731
1732 /* have our children detached first */
1733 if ((error = bus_generic_detach(dev)))
1734 return (error);
1735
1736 if (fdc->fdc_intr)
1737 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1738 fdc->fdc_intr = NULL;
1739
1740 /* kill worker thread */
1741 mtx_lock(&fdc->fdc_mtx);
1742 fdc->flags |= FDC_KTHREAD_EXIT;
1743 wakeup(&fdc->head);
1744 while ((fdc->flags & FDC_KTHREAD_ALIVE) != 0)
1745 msleep(fdc->fdc_thread, &fdc->fdc_mtx, PRIBIO, "fdcdet", 0);
1746 mtx_unlock(&fdc->fdc_mtx);
1747
1748 /* reset controller, turn motor off */
1749 fdout_wr(fdc, 0);
1750
1751 if (!(fdc->flags & FDC_NODMA))
1752 isa_dma_release(fdc->dmachan);
1753 fdc_release_resources(fdc);
1754 mtx_destroy(&fdc->fdc_mtx);
1755 return (0);
1756 }
1757
1758 /*
1759 * Add a child device to the fdc controller. It will then be probed etc.
1760 */
1761 device_t
fdc_add_child(device_t dev,const char * name,int unit)1762 fdc_add_child(device_t dev, const char *name, int unit)
1763 {
1764 struct fdc_ivars *ivar;
1765 device_t child;
1766
1767 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO);
1768 if (ivar == NULL)
1769 return (NULL);
1770 child = device_add_child(dev, name, unit);
1771 if (child == NULL) {
1772 free(ivar, M_DEVBUF);
1773 return (NULL);
1774 }
1775 device_set_ivars(child, ivar);
1776 ivar->fdunit = unit;
1777 ivar->fdtype = FDT_NONE;
1778 if (resource_disabled(name, unit))
1779 device_disable(child);
1780 return (child);
1781 }
1782
1783 int
fdc_attach(device_t dev)1784 fdc_attach(device_t dev)
1785 {
1786 struct fdc_data *fdc;
1787 int error;
1788
1789 fdc = device_get_softc(dev);
1790 fdc->fdc_dev = dev;
1791 error = fdc_initial_reset(dev, fdc);
1792 if (error) {
1793 device_printf(dev, "does not respond\n");
1794 return (error);
1795 }
1796 error = bus_setup_intr(dev, fdc->res_irq,
1797 INTR_TYPE_BIO | INTR_ENTROPY |
1798 ((fdc->flags & FDC_NOFAST) ? INTR_MPSAFE : 0),
1799 ((fdc->flags & FDC_NOFAST) ? NULL : fdc_intr_fast),
1800 ((fdc->flags & FDC_NOFAST) ? fdc_intr : NULL),
1801 fdc, &fdc->fdc_intr);
1802 if (error) {
1803 device_printf(dev, "cannot setup interrupt\n");
1804 return (error);
1805 }
1806 if (!(fdc->flags & FDC_NODMA)) {
1807 error = isa_dma_acquire(fdc->dmachan);
1808 if (!error) {
1809 error = isa_dma_init(fdc->dmachan,
1810 MAX_BYTES_PER_CYL, M_WAITOK);
1811 if (error)
1812 isa_dma_release(fdc->dmachan);
1813 }
1814 if (error)
1815 return (error);
1816 }
1817 fdc->fdcu = device_get_unit(dev);
1818 fdc->flags |= FDC_NEEDS_RESET;
1819
1820 mtx_init(&fdc->fdc_mtx, "fdc lock", NULL, MTX_DEF);
1821
1822 /* reset controller, turn motor off, clear fdout mirror reg */
1823 fdout_wr(fdc, fdc->fdout = 0);
1824 bioq_init(&fdc->head);
1825
1826 settle = hz / 8;
1827
1828 return (0);
1829 }
1830
1831 void
fdc_start_worker(device_t dev)1832 fdc_start_worker(device_t dev)
1833 {
1834 struct fdc_data *fdc;
1835
1836 fdc = device_get_softc(dev);
1837 kproc_create(fdc_thread, fdc, &fdc->fdc_thread, 0, 0,
1838 "fdc%d", device_get_unit(dev));
1839 }
1840
1841 int
fdc_hints_probe(device_t dev)1842 fdc_hints_probe(device_t dev)
1843 {
1844 const char *name, *dname;
1845 int i, error, dunit;
1846
1847 /*
1848 * Probe and attach any children. We should probably detect
1849 * devices from the BIOS unless overridden.
1850 */
1851 name = device_get_nameunit(dev);
1852 i = 0;
1853 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) {
1854 resource_int_value(dname, dunit, "drive", &dunit);
1855 fdc_add_child(dev, dname, dunit);
1856 }
1857
1858 if ((error = bus_generic_attach(dev)) != 0)
1859 return (error);
1860 return (0);
1861 }
1862
1863 int
fdc_print_child(device_t me,device_t child)1864 fdc_print_child(device_t me, device_t child)
1865 {
1866 int retval = 0, flags;
1867
1868 retval += bus_print_child_header(me, child);
1869 retval += printf(" on %s drive %d", device_get_nameunit(me),
1870 fdc_get_fdunit(child));
1871 if ((flags = device_get_flags(me)) != 0)
1872 retval += printf(" flags %#x", flags);
1873 retval += printf("\n");
1874
1875 return (retval);
1876 }
1877
1878 /*
1879 * Configuration/initialization, per drive.
1880 */
1881 static int
fd_probe(device_t dev)1882 fd_probe(device_t dev)
1883 {
1884 #if defined(__i386__) || defined(__amd64__)
1885 int unit;
1886 #endif
1887 int i;
1888 u_int st0, st3;
1889 struct fd_data *fd;
1890 struct fdc_data *fdc;
1891 int fdsu;
1892 int flags, type;
1893
1894 fdsu = fdc_get_fdunit(dev);
1895 fd = device_get_softc(dev);
1896 fdc = device_get_softc(device_get_parent(dev));
1897 flags = device_get_flags(dev);
1898
1899 fd->dev = dev;
1900 fd->fdc = fdc;
1901 fd->fdsu = fdsu;
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(__amd64__)
1915 unit = device_get_unit(dev);
1916 if (fd->type == FDT_NONE && (unit == 0 || unit == 1)) {
1917 /* Look up what the BIOS thinks we have. */
1918 if (unit == 0)
1919 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4;
1920 else
1921 fd->type = rtcin(RTC_FDISKETTE) & 0x0f;
1922 if (fd->type == FDT_288M_1)
1923 fd->type = FDT_288M;
1924 }
1925 #endif /* __i386__ || __amd64__ */
1926 /* is there a unit? */
1927 if (fd->type == FDT_NONE)
1928 return (ENXIO);
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 successfully */
1968 }
1969 }
1970 }
1971
1972 fd_motor(fd, 0);
1973 fdc->fd = NULL;
1974 mtx_unlock(&fdc->fdc_mtx);
1975
1976 if ((flags & FD_NO_PROBE) == 0 &&
1977 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */
1978 return (ENXIO);
1979
1980 done:
1981
1982 switch (fd->type) {
1983 case FDT_12M:
1984 device_set_desc(dev, "1200-KB 5.25\" drive");
1985 break;
1986 case FDT_144M:
1987 device_set_desc(dev, "1440-KB 3.5\" drive");
1988 break;
1989 case FDT_288M:
1990 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
1991 break;
1992 case FDT_360K:
1993 device_set_desc(dev, "360-KB 5.25\" drive");
1994 break;
1995 case FDT_720K:
1996 device_set_desc(dev, "720-KB 3.5\" drive");
1997 break;
1998 default:
1999 return (ENXIO);
2000 }
2001 fd->track = FD_NO_TRACK;
2002 fd->fdc = fdc;
2003 fd->fdsu = fdsu;
2004 fd->options = 0;
2005 callout_init_mtx(&fd->toffhandle, &fd->fdc->fdc_mtx, 0);
2006
2007 /* initialize densities for subdevices */
2008 fdsettype(fd, fd_native_types[fd->type]);
2009 return (0);
2010 }
2011
2012 /*
2013 * We have to do this in a geom event because GEOM is not running
2014 * when fd_attach() is.
2015 * XXX: move fd_attach after geom like ata/scsi disks
2016 */
2017 static void
fd_attach2(void * arg,int flag)2018 fd_attach2(void *arg, int flag)
2019 {
2020 struct fd_data *fd;
2021
2022 fd = arg;
2023
2024 fd->fd_geom = g_new_geomf(&g_fd_class,
2025 "fd%d", device_get_unit(fd->dev));
2026 fd->fd_provider = g_new_providerf(fd->fd_geom, "%s", fd->fd_geom->name);
2027 fd->fd_geom->softc = fd;
2028 g_error_provider(fd->fd_provider, 0);
2029 }
2030
2031 static int
fd_attach(device_t dev)2032 fd_attach(device_t dev)
2033 {
2034 struct fd_data *fd;
2035
2036 fd = device_get_softc(dev);
2037 g_post_event(fd_attach2, fd, M_WAITOK, NULL);
2038 fd->flags |= FD_EMPTY;
2039 bioq_init(&fd->fd_bq);
2040
2041 return (0);
2042 }
2043
2044 static void
fd_providergone(struct g_provider * pp)2045 fd_providergone(struct g_provider *pp)
2046 {
2047 struct fd_data *fd;
2048
2049 fd = pp->geom->softc;
2050 fd->gone = true;
2051 wakeup(fd);
2052 }
2053
2054 static void
fd_detach_geom(void * arg,int flag)2055 fd_detach_geom(void *arg, int flag)
2056 {
2057 struct fd_data *fd = arg;
2058
2059 g_topology_assert();
2060 g_wither_geom(fd->fd_geom, ENXIO);
2061 }
2062
2063 static int
fd_detach(device_t dev)2064 fd_detach(device_t dev)
2065 {
2066 struct fd_data *fd;
2067
2068 fd = device_get_softc(dev);
2069
2070 g_waitfor_event(fd_detach_geom, fd, M_WAITOK, NULL);
2071 while (!fd->gone) {
2072 tsleep(fd, PZERO, "fdgone", hz/10);
2073 }
2074
2075 /*
2076 * There may be accesses to the floppy while we're waitng, so drain the
2077 * motor callback here. fdc_detach turns off motor if it's still on when
2078 * we get to this point.
2079 */
2080 callout_drain(&fd->toffhandle);
2081
2082 return (0);
2083 }
2084
2085 static device_method_t fd_methods[] = {
2086 /* Device interface */
2087 DEVMETHOD(device_probe, fd_probe),
2088 DEVMETHOD(device_attach, fd_attach),
2089 DEVMETHOD(device_detach, fd_detach),
2090 DEVMETHOD(device_shutdown, bus_generic_shutdown),
2091 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
2092 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
2093 { 0, 0 }
2094 };
2095
2096 static driver_t fd_driver = {
2097 "fd",
2098 fd_methods,
2099 sizeof(struct fd_data)
2100 };
2101
2102 static int
fdc_modevent(module_t mod,int type,void * data)2103 fdc_modevent(module_t mod, int type, void *data)
2104 {
2105
2106 return (g_modevent(NULL, type, &g_fd_class));
2107 }
2108
2109 DRIVER_MODULE(fd, fdc, fd_driver, fdc_modevent, 0);
2110