1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2004 Poul-Henning Kamp
5 * Copyright (c) 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Don Ahn.
10 *
11 * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu)
12 * aided by the Linux floppy driver modifications from David Bateman
13 * (dbateman@eng.uts.edu.au).
14 *
15 * Copyright (c) 1993, 1994 by
16 * jc@irbs.UUCP (John Capo)
17 * vak@zebub.msk.su (Serge Vakulenko)
18 * ache@astral.msk.su (Andrew A. Chernov)
19 *
20 * Copyright (c) 1993, 1994, 1995 by
21 * joerg_wunsch@uriah.sax.de (Joerg Wunsch)
22 * dufault@hda.com (Peter Dufault)
23 *
24 * Copyright (c) 2001 Joerg Wunsch,
25 * joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
26 *
27 * Redistribution and use in source and binary forms, with or without
28 * modification, are permitted provided that the following conditions
29 * are met:
30 * 1. Redistributions of source code must retain the above copyright
31 * notice, this list of conditions and the following disclaimer.
32 * 2. Redistributions in binary form must reproduce the above copyright
33 * notice, this list of conditions and the following disclaimer in the
34 * documentation and/or other materials provided with the distribution.
35 * 3. Neither the name of the University nor the names of its contributors
36 * may be used to endorse or promote products derived from this software
37 * without specific prior written permission.
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
40 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
42 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
43 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
44 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
45 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
47 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
48 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
49 * SUCH DAMAGE.
50 *
51 * from: @(#)fd.c 7.4 (Berkeley) 5/25/91
52 *
53 */
54
55 #include <sys/cdefs.h>
56 #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 };
263
264 #define FD_NOT_VALID -2
265
266 static driver_intr_t fdc_intr;
267 static driver_filter_t fdc_intr_fast;
268 static void fdc_reset(struct fdc_data *);
269 static int fd_probe_disk(struct fd_data *, int *);
270
271 static SYSCTL_NODE(_debug, OID_AUTO, fdc, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
272 "fdc driver");
273
274 static int fifo_threshold = 8;
275 SYSCTL_INT(_debug_fdc, OID_AUTO, fifo, CTLFLAG_RW, &fifo_threshold, 0,
276 "FIFO threshold setting");
277
278 static int debugflags = 0;
279 SYSCTL_INT(_debug_fdc, OID_AUTO, debugflags, CTLFLAG_RW, &debugflags, 0,
280 "Debug flags");
281
282 static int retries = 10;
283 SYSCTL_INT(_debug_fdc, OID_AUTO, retries, CTLFLAG_RW, &retries, 0,
284 "Number of retries to attempt");
285
286 static int spec1 = NE7_SPEC_1(6, 240);
287 SYSCTL_INT(_debug_fdc, OID_AUTO, spec1, CTLFLAG_RW, &spec1, 0,
288 "Specification byte one (step-rate + head unload)");
289
290 static int spec2 = NE7_SPEC_2(16, 0);
291 SYSCTL_INT(_debug_fdc, OID_AUTO, spec2, CTLFLAG_RW, &spec2, 0,
292 "Specification byte two (head load time + no-dma)");
293
294 static int settle;
295 SYSCTL_INT(_debug_fdc, OID_AUTO, settle, CTLFLAG_RW, &settle, 0,
296 "Head settling time in sec/hz");
297
298 static void
fdprinttype(struct fd_type * ft)299 fdprinttype(struct fd_type *ft)
300 {
301
302 printf("(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,0x%x)",
303 ft->sectrac, ft->secsize, ft->datalen, ft->gap, ft->tracks,
304 ft->size, ft->trans, ft->heads, ft->f_gap, ft->f_inter,
305 ft->offset_side2, ft->flags);
306 }
307
308 static void
fdsettype(struct fd_data * fd,struct fd_type * ft)309 fdsettype(struct fd_data *fd, struct fd_type *ft)
310 {
311 fd->ft = ft;
312 ft->size = ft->sectrac * ft->heads * ft->tracks;
313 fd->sectorsize = 128 << fd->ft->secsize;
314 }
315
316 /*
317 * Bus space handling (access to low-level IO).
318 */
319 static inline void
fdregwr(struct fdc_data * fdc,int reg,uint8_t v)320 fdregwr(struct fdc_data *fdc, int reg, uint8_t v)
321 {
322
323 bus_space_write_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg], v);
324 }
325
326 static inline uint8_t
fdregrd(struct fdc_data * fdc,int reg)327 fdregrd(struct fdc_data *fdc, int reg)
328 {
329
330 return bus_space_read_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg]);
331 }
332
333 static void
fdctl_wr(struct fdc_data * fdc,u_int8_t v)334 fdctl_wr(struct fdc_data *fdc, u_int8_t v)
335 {
336
337 fdregwr(fdc, FDCTL, v);
338 }
339
340 static void
fdout_wr(struct fdc_data * fdc,u_int8_t v)341 fdout_wr(struct fdc_data *fdc, u_int8_t v)
342 {
343
344 fdregwr(fdc, FDOUT, v);
345 }
346
347 static u_int8_t
fdsts_rd(struct fdc_data * fdc)348 fdsts_rd(struct fdc_data *fdc)
349 {
350
351 return fdregrd(fdc, FDSTS);
352 }
353
354 static void
fddsr_wr(struct fdc_data * fdc,u_int8_t v)355 fddsr_wr(struct fdc_data *fdc, u_int8_t v)
356 {
357
358 fdregwr(fdc, FDDSR, v);
359 }
360
361 static void
fddata_wr(struct fdc_data * fdc,u_int8_t v)362 fddata_wr(struct fdc_data *fdc, u_int8_t v)
363 {
364
365 fdregwr(fdc, FDDATA, v);
366 }
367
368 static u_int8_t
fddata_rd(struct fdc_data * fdc)369 fddata_rd(struct fdc_data *fdc)
370 {
371
372 return fdregrd(fdc, FDDATA);
373 }
374
375 static u_int8_t
fdin_rd(struct fdc_data * fdc)376 fdin_rd(struct fdc_data *fdc)
377 {
378
379 return fdregrd(fdc, FDCTL);
380 }
381
382 /*
383 * Magic pseudo-DMA initialization for YE FDC. Sets count and
384 * direction.
385 */
386 static void
fdbcdr_wr(struct fdc_data * fdc,int iswrite,uint16_t count)387 fdbcdr_wr(struct fdc_data *fdc, int iswrite, uint16_t count)
388 {
389 fdregwr(fdc, FDBCDR, (count - 1) & 0xff);
390 fdregwr(fdc, FDBCDR + 1,
391 (iswrite ? 0x80 : 0) | (((count - 1) >> 8) & 0x7f));
392 }
393
394 static int
fdc_err(struct fdc_data * fdc,const char * s)395 fdc_err(struct fdc_data *fdc, const char *s)
396 {
397 fdc->fdc_errs++;
398 if (s) {
399 if (fdc->fdc_errs < FDC_ERRMAX)
400 device_printf(fdc->fdc_dev, "%s", s);
401 else if (fdc->fdc_errs == FDC_ERRMAX)
402 device_printf(fdc->fdc_dev, "too many errors, not "
403 "logging any more\n");
404 }
405
406 return (1);
407 }
408
409 /*
410 * FDC IO functions, take care of the main status register, timeout
411 * in case the desired status bits are never set.
412 *
413 * These PIO loops initially start out with short delays between
414 * each iteration in the expectation that the required condition
415 * is usually met quickly, so it can be handled immediately.
416 */
417 static int
fdc_in(struct fdc_data * fdc,int * ptr)418 fdc_in(struct fdc_data *fdc, int *ptr)
419 {
420 int i, j, step;
421
422 step = 1;
423 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
424 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
425 if (i == (NE7_DIO|NE7_RQM)) {
426 i = fddata_rd(fdc);
427 if (ptr)
428 *ptr = i;
429 return (0);
430 }
431 if (i == NE7_RQM)
432 return (fdc_err(fdc, "ready for output in input\n"));
433 step += step;
434 DELAY(step);
435 }
436 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
437 }
438
439 static int
fdc_out(struct fdc_data * fdc,int x)440 fdc_out(struct fdc_data *fdc, int x)
441 {
442 int i, j, step;
443
444 step = 1;
445 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
446 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
447 if (i == NE7_RQM) {
448 fddata_wr(fdc, x);
449 return (0);
450 }
451 if (i == (NE7_DIO|NE7_RQM))
452 return (fdc_err(fdc, "ready for input in output\n"));
453 step += step;
454 DELAY(step);
455 }
456 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
457 }
458
459 /*
460 * fdc_cmd: Send a command to the chip.
461 * Takes a varargs with this structure:
462 * # of output bytes
463 * output bytes as int [...]
464 * # of input bytes
465 * input bytes as int* [...]
466 */
467 static int
fdc_cmd(struct fdc_data * fdc,int n_out,...)468 fdc_cmd(struct fdc_data *fdc, int n_out, ...)
469 {
470 u_char cmd = 0;
471 int n_in;
472 int n, i;
473 va_list ap;
474
475 va_start(ap, n_out);
476 for (n = 0; n < n_out; n++) {
477 i = va_arg(ap, int);
478 if (n == 0)
479 cmd = i;
480 if (fdc_out(fdc, i) < 0) {
481 char msg[50];
482 snprintf(msg, sizeof(msg),
483 "cmd %x failed at out byte %d of %d\n",
484 cmd, n + 1, n_out);
485 fdc->flags |= FDC_NEEDS_RESET;
486 va_end(ap);
487 return fdc_err(fdc, msg);
488 }
489 }
490 n_in = va_arg(ap, int);
491 for (n = 0; n < n_in; n++) {
492 int *ptr = va_arg(ap, int *);
493 if (fdc_in(fdc, ptr) != 0) {
494 char msg[50];
495 snprintf(msg, sizeof(msg),
496 "cmd %02x failed at in byte %d of %d\n",
497 cmd, n + 1, n_in);
498 fdc->flags |= FDC_NEEDS_RESET;
499 va_end(ap);
500 return fdc_err(fdc, msg);
501 }
502 }
503 va_end(ap);
504 return (0);
505 }
506
507 static void
fdc_reset(struct fdc_data * fdc)508 fdc_reset(struct fdc_data *fdc)
509 {
510 int i, r[10];
511
512 if (fdc->fdct == FDC_ENHANCED) {
513 /* Try a software reset, default precomp, and 500 kb/s */
514 fddsr_wr(fdc, I8207X_DSR_SR);
515 } else {
516 /* Try a hardware reset, keep motor on */
517 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
518 DELAY(100);
519 /* enable FDC, but defer interrupts a moment */
520 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
521 }
522 DELAY(100);
523 fdout_wr(fdc, fdc->fdout);
524
525 /* XXX after a reset, silently believe the FDC will accept commands */
526 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, spec1, spec2, 0))
527 device_printf(fdc->fdc_dev, " SPECIFY failed in reset\n");
528
529 if (fdc->fdct == FDC_ENHANCED) {
530 if (fdc_cmd(fdc, 4,
531 I8207X_CONFIG,
532 0,
533 /* 0x40 | */ /* Enable Implied Seek -
534 * breaks 2step! */
535 0x10 | /* Polling disabled */
536 (fifo_threshold - 1), /* Fifo threshold */
537 0x00, /* Precomp track */
538 0))
539 device_printf(fdc->fdc_dev,
540 " CONFIGURE failed in reset\n");
541 if (debugflags & 1) {
542 if (fdc_cmd(fdc, 1,
543 I8207X_DUMPREG,
544 10, &r[0], &r[1], &r[2], &r[3], &r[4],
545 &r[5], &r[6], &r[7], &r[8], &r[9]))
546 device_printf(fdc->fdc_dev,
547 " DUMPREG failed in reset\n");
548 for (i = 0; i < 10; i++)
549 printf(" %02x", r[i]);
550 printf("\n");
551 }
552 }
553 }
554
555 static int
fdc_sense_drive(struct fdc_data * fdc,int * st3p)556 fdc_sense_drive(struct fdc_data *fdc, int *st3p)
557 {
558 int st3;
559
560 if (fdc_cmd(fdc, 2, NE7CMD_SENSED, fdc->fd->fdsu, 1, &st3))
561 return (fdc_err(fdc, "Sense Drive Status failed\n"));
562 if (st3p)
563 *st3p = st3;
564 return (0);
565 }
566
567 static int
fdc_sense_int(struct fdc_data * fdc,int * st0p,int * cylp)568 fdc_sense_int(struct fdc_data *fdc, int *st0p, int *cylp)
569 {
570 int cyl, st0, ret;
571
572 ret = fdc_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
573 if (ret) {
574 (void)fdc_err(fdc, "sense intr err reading stat reg 0\n");
575 return (ret);
576 }
577
578 if (st0p)
579 *st0p = st0;
580
581 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
582 /*
583 * There doesn't seem to have been an interrupt.
584 */
585 return (FD_NOT_VALID);
586 }
587
588 if (fdc_in(fdc, &cyl) != 0)
589 return fdc_err(fdc, "can't get cyl num\n");
590
591 if (cylp)
592 *cylp = cyl;
593
594 return (0);
595 }
596
597 static int
fdc_read_status(struct fdc_data * fdc)598 fdc_read_status(struct fdc_data *fdc)
599 {
600 int i, ret, status;
601
602 for (i = ret = 0; i < 7; i++) {
603 ret = fdc_in(fdc, &status);
604 fdc->status[i] = status;
605 if (ret != 0)
606 break;
607 }
608
609 if (ret == 0)
610 fdc->flags |= FDC_STAT_VALID;
611 else
612 fdc->flags &= ~FDC_STAT_VALID;
613
614 return ret;
615 }
616
617 /*
618 * Select this drive
619 */
620 static void
fd_select(struct fd_data * fd)621 fd_select(struct fd_data *fd)
622 {
623 struct fdc_data *fdc;
624
625 /* XXX: lock controller */
626 fdc = fd->fdc;
627 fdc->fdout &= ~FDO_FDSEL;
628 fdc->fdout |= FDO_FDMAEN | FDO_FRST | fd->fdsu;
629 fdout_wr(fdc, fdc->fdout);
630 }
631
632 static void
fd_turnon(void * arg)633 fd_turnon(void *arg)
634 {
635 struct fd_data *fd;
636 struct bio *bp;
637 int once;
638
639 fd = arg;
640 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
641 fd->flags &= ~FD_MOTORWAIT;
642 fd->flags |= FD_MOTOR;
643 once = 0;
644 for (;;) {
645 bp = bioq_takefirst(&fd->fd_bq);
646 if (bp == NULL)
647 break;
648 bioq_disksort(&fd->fdc->head, bp);
649 once = 1;
650 }
651 if (once)
652 wakeup(&fd->fdc->head);
653 }
654
655 static void
fd_motor(struct fd_data * fd,int turnon)656 fd_motor(struct fd_data *fd, int turnon)
657 {
658 struct fdc_data *fdc;
659
660 fdc = fd->fdc;
661 /*
662 mtx_assert(&fdc->fdc_mtx, MA_OWNED);
663 */
664 if (turnon) {
665 fd->flags |= FD_MOTORWAIT;
666 fdc->fdout |= (FDO_MOEN0 << fd->fdsu);
667 callout_reset(&fd->toffhandle, hz, fd_turnon, fd);
668 } else {
669 callout_stop(&fd->toffhandle);
670 fd->flags &= ~(FD_MOTOR|FD_MOTORWAIT);
671 fdc->fdout &= ~(FDO_MOEN0 << fd->fdsu);
672 }
673 fdout_wr(fdc, fdc->fdout);
674 }
675
676 static void
fd_turnoff(void * xfd)677 fd_turnoff(void *xfd)
678 {
679 struct fd_data *fd = xfd;
680
681 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
682 fd_motor(fd, 0);
683 }
684
685 /*
686 * fdc_intr - wake up the worker thread.
687 */
688
689 static void
fdc_intr(void * arg)690 fdc_intr(void *arg)
691 {
692
693 wakeup(arg);
694 }
695
696 static int
fdc_intr_fast(void * arg)697 fdc_intr_fast(void *arg)
698 {
699
700 wakeup(arg);
701 return(FILTER_HANDLED);
702 }
703
704 /*
705 * fdc_pio(): perform programmed IO read/write for YE PCMCIA floppy.
706 */
707 static void
fdc_pio(struct fdc_data * fdc)708 fdc_pio(struct fdc_data *fdc)
709 {
710 u_char *cptr;
711 struct bio *bp;
712 u_int count;
713
714 bp = fdc->bp;
715 cptr = fdc->fd->fd_ioptr;
716 count = fdc->fd->fd_iosize;
717
718 if (bp->bio_cmd == BIO_READ) {
719 fdbcdr_wr(fdc, 0, count);
720 bus_space_read_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
721 fdc->ioff[FD_YE_DATAPORT], cptr, count);
722 } else {
723 bus_space_write_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
724 fdc->ioff[FD_YE_DATAPORT], cptr, count);
725 fdbcdr_wr(fdc, 0, count); /* needed? */
726 }
727 }
728
729 static int
fdc_biodone(struct fdc_data * fdc,int error)730 fdc_biodone(struct fdc_data *fdc, int error)
731 {
732 struct fd_data *fd;
733 struct bio *bp;
734
735 fd = fdc->fd;
736 bp = fdc->bp;
737
738 mtx_lock(&fdc->fdc_mtx);
739 if (--fd->fd_iocount == 0)
740 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
741 fdc->bp = NULL;
742 fdc->fd = NULL;
743 mtx_unlock(&fdc->fdc_mtx);
744 if (bp->bio_to != NULL) {
745 if ((debugflags & 2) && fd->fdc->retry > 0)
746 printf("retries: %d\n", fd->fdc->retry);
747 g_io_deliver(bp, error);
748 return (0);
749 }
750 bp->bio_error = error;
751 bp->bio_flags |= BIO_DONE;
752 wakeup(bp);
753 return (0);
754 }
755
756 static int retry_line;
757
758 static int
fdc_worker(struct fdc_data * fdc)759 fdc_worker(struct fdc_data *fdc)
760 {
761 struct fd_data *fd;
762 struct bio *bp;
763 int i, nsect;
764 int st0, st3, cyl, mfm, steptrac, cylinder, descyl, sec;
765 int head;
766 int override_error;
767 static int need_recal;
768 struct fdc_readid *idp;
769 struct fd_formb *finfo;
770
771 override_error = 0;
772
773 /* Have we exhausted our retries ? */
774 bp = fdc->bp;
775 fd = fdc->fd;
776 if (bp != NULL &&
777 (fdc->retry >= retries || (fd->options & FDOPT_NORETRY))) {
778 if ((debugflags & 4))
779 printf("Too many retries (EIO)\n");
780 if (fdc->flags & FDC_NEEDS_RESET) {
781 mtx_lock(&fdc->fdc_mtx);
782 fd->flags |= FD_EMPTY;
783 mtx_unlock(&fdc->fdc_mtx);
784 }
785 return (fdc_biodone(fdc, EIO));
786 }
787
788 /* Disable ISADMA if we bailed while it was active */
789 if (fd != NULL && (fd->flags & FD_ISADMA)) {
790 isa_dmadone(
791 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
792 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
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 if (cold)
803 DELAY(1000000);
804 else
805 tsleep(fdc, PRIBIO, "fdcrst", hz);
806 /* Discard results */
807 for (i = 0; i < 4; i++)
808 fdc_sense_int(fdc, &st0, &cyl);
809 /* All drives must recal */
810 need_recal = 0xf;
811 }
812
813 /* Pick up a request, if need be wait for it */
814 if (fdc->bp == NULL) {
815 mtx_lock(&fdc->fdc_mtx);
816 do {
817 fdc->bp = bioq_takefirst(&fdc->head);
818 if (fdc->bp == NULL)
819 msleep(&fdc->head, &fdc->fdc_mtx,
820 PRIBIO, "-", 0);
821 } while (fdc->bp == NULL &&
822 (fdc->flags & FDC_KTHREAD_EXIT) == 0);
823 mtx_unlock(&fdc->fdc_mtx);
824
825 if (fdc->bp == NULL)
826 /*
827 * Nothing to do, worker thread has been
828 * requested to stop.
829 */
830 return (0);
831
832 bp = fdc->bp;
833 fd = fdc->fd = bp->bio_driver1;
834 fdc->retry = 0;
835 fd->fd_ioptr = bp->bio_data;
836 if (bp->bio_cmd == BIO_FMT) {
837 i = offsetof(struct fd_formb, fd_formb_cylno(0));
838 fd->fd_ioptr += i;
839 fd->fd_iosize = bp->bio_length - i;
840 }
841 }
842
843 /* Select drive, setup params */
844 fd_select(fd);
845 if (fdc->fdct == FDC_ENHANCED)
846 fddsr_wr(fdc, fd->ft->trans);
847 else
848 fdctl_wr(fdc, fd->ft->trans);
849
850 if (bp->bio_cmd == BIO_PROBE) {
851 if ((!(device_get_flags(fd->dev) & FD_NO_CHLINE) &&
852 !(fdin_rd(fdc) & FDI_DCHG) &&
853 !(fd->flags & FD_EMPTY)) ||
854 fd_probe_disk(fd, &need_recal) == 0)
855 return (fdc_biodone(fdc, 0));
856 return (1);
857 }
858
859 /*
860 * If we are dead just flush the requests
861 */
862 if (fd->flags & FD_EMPTY)
863 return (fdc_biodone(fdc, ENXIO));
864
865 /* Check if we lost our media */
866 if (fdin_rd(fdc) & FDI_DCHG) {
867 if (debugflags & 0x40)
868 printf("Lost disk\n");
869 mtx_lock(&fdc->fdc_mtx);
870 fd->flags |= FD_EMPTY;
871 fd->flags |= FD_NEWDISK;
872 mtx_unlock(&fdc->fdc_mtx);
873 g_topology_lock();
874 g_orphan_provider(fd->fd_provider, ENXIO);
875 fd->fd_provider->flags |= G_PF_WITHER;
876 fd->fd_provider =
877 g_new_providerf(fd->fd_geom, "%s", fd->fd_geom->name);
878 g_error_provider(fd->fd_provider, 0);
879 g_topology_unlock();
880 return (fdc_biodone(fdc, ENXIO));
881 }
882
883 /* Check if the floppy is write-protected */
884 if (bp->bio_cmd == BIO_FMT || bp->bio_cmd == BIO_WRITE) {
885 retry_line = __LINE__;
886 if(fdc_sense_drive(fdc, &st3) != 0)
887 return (1);
888 if(st3 & NE7_ST3_WP)
889 return (fdc_biodone(fdc, EROFS));
890 }
891
892 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0;
893 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1;
894 i = fd->ft->sectrac * fd->ft->heads;
895 cylinder = bp->bio_pblkno / i;
896 descyl = cylinder * steptrac;
897 sec = bp->bio_pblkno % i;
898 nsect = i - sec;
899 head = sec / fd->ft->sectrac;
900 sec = sec % fd->ft->sectrac + 1;
901
902 /* If everything is going swimmingly, use multisector xfer */
903 if (fdc->retry == 0 &&
904 (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE)) {
905 fd->fd_iosize = imin(nsect * fd->sectorsize, bp->bio_resid);
906 nsect = fd->fd_iosize / fd->sectorsize;
907 } else if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) {
908 fd->fd_iosize = fd->sectorsize;
909 nsect = 1;
910 }
911
912 /* Do RECAL if we need to or are going to track zero anyway */
913 if ((need_recal & (1 << fd->fdsu)) ||
914 (cylinder == 0 && fd->track != 0) ||
915 fdc->retry > 2) {
916 retry_line = __LINE__;
917 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
918 return (1);
919 tsleep(fdc, PRIBIO, "fdrecal", hz);
920 retry_line = __LINE__;
921 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
922 return (1); /* XXX */
923 retry_line = __LINE__;
924 if ((st0 & 0xc0) || cyl != 0)
925 return (1);
926 need_recal &= ~(1 << fd->fdsu);
927 fd->track = 0;
928 /* let the heads settle */
929 if (settle)
930 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
931 }
932
933 /*
934 * SEEK to where we want to be
935 */
936 if (cylinder != fd->track) {
937 retry_line = __LINE__;
938 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, descyl, 0))
939 return (1);
940 tsleep(fdc, PRIBIO, "fdseek", hz);
941 retry_line = __LINE__;
942 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
943 return (1); /* XXX */
944 retry_line = __LINE__;
945 if ((st0 & 0xc0) || cyl != descyl) {
946 need_recal |= (1 << fd->fdsu);
947 return (1);
948 }
949 /* let the heads settle */
950 if (settle)
951 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
952 }
953 fd->track = cylinder;
954
955 if (debugflags & 8)
956 printf("op %x bn %ju siz %u ptr %p retry %d\n",
957 bp->bio_cmd, bp->bio_pblkno, fd->fd_iosize,
958 fd->fd_ioptr, fdc->retry);
959
960 /* Setup ISADMA if we need it and have it */
961 if ((bp->bio_cmd == BIO_READ ||
962 bp->bio_cmd == BIO_WRITE ||
963 bp->bio_cmd == BIO_FMT)
964 && !(fdc->flags & FDC_NODMA)) {
965 isa_dmastart(
966 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
967 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
968 mtx_lock(&fdc->fdc_mtx);
969 fd->flags |= FD_ISADMA;
970 mtx_unlock(&fdc->fdc_mtx);
971 }
972
973 /* Do PIO if we have to */
974 if (fdc->flags & FDC_NODMA) {
975 if (bp->bio_cmd == BIO_READ ||
976 bp->bio_cmd == BIO_WRITE ||
977 bp->bio_cmd == BIO_FMT)
978 fdbcdr_wr(fdc, 1, fd->fd_iosize);
979 if (bp->bio_cmd == BIO_WRITE ||
980 bp->bio_cmd == BIO_FMT)
981 fdc_pio(fdc);
982 }
983
984 switch(bp->bio_cmd) {
985 case BIO_FMT:
986 /* formatting */
987 finfo = (struct fd_formb *)bp->bio_data;
988 retry_line = __LINE__;
989 if (fdc_cmd(fdc, 6,
990 NE7CMD_FORMAT | mfm,
991 head << 2 | fd->fdsu,
992 finfo->fd_formb_secshift,
993 finfo->fd_formb_nsecs,
994 finfo->fd_formb_gaplen,
995 finfo->fd_formb_fillbyte, 0))
996 return (1);
997 break;
998 case BIO_RDID:
999 retry_line = __LINE__;
1000 if (fdc_cmd(fdc, 2,
1001 NE7CMD_READID | mfm,
1002 head << 2 | fd->fdsu, 0))
1003 return (1);
1004 break;
1005 case BIO_READ:
1006 retry_line = __LINE__;
1007 if (fdc_cmd(fdc, 9,
1008 NE7CMD_READ | NE7CMD_SK | mfm | NE7CMD_MT,
1009 head << 2 | fd->fdsu, /* head & unit */
1010 fd->track, /* track */
1011 head, /* head */
1012 sec, /* sector + 1 */
1013 fd->ft->secsize, /* sector size */
1014 fd->ft->sectrac, /* sectors/track */
1015 fd->ft->gap, /* gap size */
1016 fd->ft->datalen, /* data length */
1017 0))
1018 return (1);
1019 break;
1020 case BIO_WRITE:
1021 retry_line = __LINE__;
1022 if (fdc_cmd(fdc, 9,
1023 NE7CMD_WRITE | mfm | NE7CMD_MT,
1024 head << 2 | fd->fdsu, /* head & unit */
1025 fd->track, /* track */
1026 head, /* head */
1027 sec, /* sector + 1 */
1028 fd->ft->secsize, /* sector size */
1029 fd->ft->sectrac, /* sectors/track */
1030 fd->ft->gap, /* gap size */
1031 fd->ft->datalen, /* data length */
1032 0))
1033 return (1);
1034 break;
1035 default:
1036 KASSERT(0 == 1, ("Wrong bio_cmd %x\n", bp->bio_cmd));
1037 }
1038
1039 /* Wait for interrupt */
1040 i = tsleep(fdc, PRIBIO, "fddata", hz);
1041
1042 /* PIO if the read looks good */
1043 if (i == 0 && (fdc->flags & FDC_NODMA) && (bp->bio_cmd == BIO_READ))
1044 fdc_pio(fdc);
1045
1046 /* Finish DMA */
1047 if (fd->flags & FD_ISADMA) {
1048 isa_dmadone(
1049 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
1050 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
1051 mtx_lock(&fdc->fdc_mtx);
1052 fd->flags &= ~FD_ISADMA;
1053 mtx_unlock(&fdc->fdc_mtx);
1054 }
1055
1056 if (i != 0) {
1057 /*
1058 * Timeout.
1059 *
1060 * Due to IBM's brain-dead design, the FDC has a faked ready
1061 * signal, hardwired to ready == true. Thus, any command
1062 * issued if there's no diskette in the drive will _never_
1063 * complete, and must be aborted by resetting the FDC.
1064 * Many thanks, Big Blue!
1065 */
1066 retry_line = __LINE__;
1067 fdc->flags |= FDC_NEEDS_RESET;
1068 return (1);
1069 }
1070
1071 retry_line = __LINE__;
1072 if (fdc_read_status(fdc))
1073 return (1);
1074
1075 if (debugflags & 0x10)
1076 printf(" -> %x %x %x %x\n",
1077 fdc->status[0], fdc->status[1],
1078 fdc->status[2], fdc->status[3]);
1079
1080 st0 = fdc->status[0] & NE7_ST0_IC;
1081 if (st0 != 0) {
1082 retry_line = __LINE__;
1083 if (st0 == NE7_ST0_IC_AT && fdc->status[1] & NE7_ST1_OR) {
1084 /*
1085 * DMA overrun. Someone hogged the bus and
1086 * didn't release it in time for the next
1087 * FDC transfer.
1088 */
1089 return (1);
1090 }
1091 retry_line = __LINE__;
1092 if(st0 == NE7_ST0_IC_IV) {
1093 fdc->flags |= FDC_NEEDS_RESET;
1094 return (1);
1095 }
1096 retry_line = __LINE__;
1097 if(st0 == NE7_ST0_IC_AT && fdc->status[2] & NE7_ST2_WC) {
1098 need_recal |= (1 << fd->fdsu);
1099 return (1);
1100 }
1101 if (debugflags & 0x20) {
1102 printf("status %02x %02x %02x %02x %02x %02x\n",
1103 fdc->status[0], fdc->status[1], fdc->status[2],
1104 fdc->status[3], fdc->status[4], fdc->status[5]);
1105 }
1106 retry_line = __LINE__;
1107 if (fd->options & FDOPT_NOERROR)
1108 override_error = 1;
1109 else
1110 return (1);
1111 }
1112 /* All OK */
1113 switch(bp->bio_cmd) {
1114 case BIO_RDID:
1115 /* copy out ID field contents */
1116 idp = (struct fdc_readid *)bp->bio_data;
1117 idp->cyl = fdc->status[3];
1118 idp->head = fdc->status[4];
1119 idp->sec = fdc->status[5];
1120 idp->secshift = fdc->status[6];
1121 if (debugflags & 0x40)
1122 printf("c %d h %d s %d z %d\n",
1123 idp->cyl, idp->head, idp->sec, idp->secshift);
1124 break;
1125 case BIO_READ:
1126 case BIO_WRITE:
1127 bp->bio_pblkno += nsect;
1128 bp->bio_resid -= fd->fd_iosize;
1129 bp->bio_completed += fd->fd_iosize;
1130 fd->fd_ioptr += fd->fd_iosize;
1131 if (override_error) {
1132 if ((debugflags & 4))
1133 printf("FDOPT_NOERROR: returning bad data\n");
1134 } else {
1135 /* Since we managed to get something done,
1136 * reset the retry */
1137 fdc->retry = 0;
1138 if (bp->bio_resid > 0)
1139 return (0);
1140 }
1141 break;
1142 case BIO_FMT:
1143 break;
1144 }
1145 return (fdc_biodone(fdc, 0));
1146 }
1147
1148 static void
fdc_thread(void * arg)1149 fdc_thread(void *arg)
1150 {
1151 struct fdc_data *fdc;
1152
1153 fdc = arg;
1154 int i;
1155
1156 mtx_lock(&fdc->fdc_mtx);
1157 fdc->flags |= FDC_KTHREAD_ALIVE;
1158 while ((fdc->flags & FDC_KTHREAD_EXIT) == 0) {
1159 mtx_unlock(&fdc->fdc_mtx);
1160 i = fdc_worker(fdc);
1161 if (i && debugflags & 0x20) {
1162 if (fdc->bp != NULL)
1163 g_print_bio("", fdc->bp, "");
1164 printf("Retry line %d\n", retry_line);
1165 }
1166 fdc->retry += i;
1167 mtx_lock(&fdc->fdc_mtx);
1168 }
1169 fdc->flags &= ~(FDC_KTHREAD_EXIT | FDC_KTHREAD_ALIVE);
1170 mtx_unlock(&fdc->fdc_mtx);
1171
1172 kproc_exit(0);
1173 }
1174
1175 /*
1176 * Enqueue a request.
1177 */
1178 static void
fd_enqueue(struct fd_data * fd,struct bio * bp)1179 fd_enqueue(struct fd_data *fd, struct bio *bp)
1180 {
1181 struct fdc_data *fdc;
1182 int call;
1183
1184 call = 0;
1185 fdc = fd->fdc;
1186 mtx_lock(&fdc->fdc_mtx);
1187 /* If we go from idle, cancel motor turnoff */
1188 if (fd->fd_iocount++ == 0)
1189 callout_stop(&fd->toffhandle);
1190 if (fd->flags & FD_MOTOR) {
1191 /* The motor is on, send it directly to the controller */
1192 bioq_disksort(&fdc->head, bp);
1193 wakeup(&fdc->head);
1194 } else {
1195 /* Queue it on the drive until the motor has started */
1196 bioq_insert_tail(&fd->fd_bq, bp);
1197 if (!(fd->flags & FD_MOTORWAIT))
1198 fd_motor(fd, 1);
1199 }
1200 mtx_unlock(&fdc->fdc_mtx);
1201 }
1202
1203 /*
1204 * Try to find out if we have a disk in the drive.
1205 */
1206 static int
fd_probe_disk(struct fd_data * fd,int * recal)1207 fd_probe_disk(struct fd_data *fd, int *recal)
1208 {
1209 struct fdc_data *fdc;
1210 int st0, st3, cyl;
1211 int oopts, ret;
1212
1213 fdc = fd->fdc;
1214 oopts = fd->options;
1215 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1216 ret = 1;
1217
1218 /*
1219 * First recal, then seek to cyl#1, this clears the old condition on
1220 * the disk change line so we can examine it for current status.
1221 */
1222 if (debugflags & 0x40)
1223 printf("New disk in probe\n");
1224 mtx_lock(&fdc->fdc_mtx);
1225 fd->flags |= FD_NEWDISK;
1226 mtx_unlock(&fdc->fdc_mtx);
1227 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
1228 goto done;
1229 tsleep(fdc, PRIBIO, "fdrecal", hz);
1230 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1231 goto done; /* XXX */
1232 if ((st0 & 0xc0) || cyl != 0)
1233 goto done;
1234
1235 /* Seek to track 1 */
1236 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, 1, 0))
1237 goto done;
1238 tsleep(fdc, PRIBIO, "fdseek", hz);
1239 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1240 goto done; /* XXX */
1241 *recal |= (1 << fd->fdsu);
1242 if (fdin_rd(fdc) & FDI_DCHG) {
1243 if (debugflags & 0x40)
1244 printf("Empty in probe\n");
1245 mtx_lock(&fdc->fdc_mtx);
1246 fd->flags |= FD_EMPTY;
1247 mtx_unlock(&fdc->fdc_mtx);
1248 } else {
1249 if (fdc_sense_drive(fdc, &st3) != 0)
1250 goto done;
1251 if (debugflags & 0x40)
1252 printf("Got disk in probe\n");
1253 mtx_lock(&fdc->fdc_mtx);
1254 fd->flags &= ~FD_EMPTY;
1255 if (st3 & NE7_ST3_WP)
1256 fd->flags |= FD_WP;
1257 else
1258 fd->flags &= ~FD_WP;
1259 mtx_unlock(&fdc->fdc_mtx);
1260 }
1261 ret = 0;
1262
1263 done:
1264 fd->options = oopts;
1265 return (ret);
1266 }
1267
1268 static int
fdmisccmd(struct fd_data * fd,u_int cmd,void * data)1269 fdmisccmd(struct fd_data *fd, u_int cmd, void *data)
1270 {
1271 struct bio *bp;
1272 struct fd_formb *finfo;
1273 struct fdc_readid *idfield;
1274 int error;
1275
1276 bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO);
1277
1278 /*
1279 * Set up a bio request for fdstrategy(). bio_offset is faked
1280 * so that fdstrategy() will seek to the requested
1281 * cylinder, and use the desired head.
1282 */
1283 bp->bio_cmd = cmd;
1284 if (cmd == BIO_FMT) {
1285 finfo = (struct fd_formb *)data;
1286 bp->bio_pblkno =
1287 (finfo->cyl * fd->ft->heads + finfo->head) *
1288 fd->ft->sectrac;
1289 bp->bio_length = sizeof *finfo;
1290 } else if (cmd == BIO_RDID) {
1291 idfield = (struct fdc_readid *)data;
1292 bp->bio_pblkno =
1293 (idfield->cyl * fd->ft->heads + idfield->head) *
1294 fd->ft->sectrac;
1295 bp->bio_length = sizeof(struct fdc_readid);
1296 } else if (cmd == BIO_PROBE) {
1297 /* nothing */
1298 } else
1299 panic("wrong cmd in fdmisccmd()");
1300 bp->bio_offset = bp->bio_pblkno * fd->sectorsize;
1301 bp->bio_data = data;
1302 bp->bio_driver1 = fd;
1303 bp->bio_flags = 0;
1304
1305 fd_enqueue(fd, bp);
1306
1307 do {
1308 tsleep(bp, PRIBIO, "fdwait", hz);
1309 } while (!(bp->bio_flags & BIO_DONE));
1310 error = bp->bio_error;
1311
1312 free(bp, M_TEMP);
1313 return (error);
1314 }
1315
1316 /*
1317 * Try figuring out the density of the media present in our device.
1318 */
1319 static int
fdautoselect(struct fd_data * fd)1320 fdautoselect(struct fd_data *fd)
1321 {
1322 struct fd_type *fdtp;
1323 struct fdc_readid id;
1324 int oopts, rv;
1325
1326 if (!(fd->ft->flags & FL_AUTO))
1327 return (0);
1328
1329 fdtp = fd_native_types[fd->type];
1330 fdsettype(fd, fdtp);
1331 if (!(fd->ft->flags & FL_AUTO))
1332 return (0);
1333
1334 /*
1335 * Try reading sector ID fields, first at cylinder 0, head 0,
1336 * then at cylinder 2, head N. We don't probe cylinder 1,
1337 * since for 5.25in DD media in a HD drive, there are no data
1338 * to read (2 step pulses per media cylinder required). For
1339 * two-sided media, the second probe always goes to head 1, so
1340 * we can tell them apart from single-sided media. As a
1341 * side-effect this means that single-sided media should be
1342 * mentioned in the search list after two-sided media of an
1343 * otherwise identical density. Media with a different number
1344 * of sectors per track but otherwise identical parameters
1345 * cannot be distinguished at all.
1346 *
1347 * If we successfully read an ID field on both cylinders where
1348 * the recorded values match our expectation, we are done.
1349 * Otherwise, we try the next density entry from the table.
1350 *
1351 * Stepping to cylinder 2 has the side-effect of clearing the
1352 * unit attention bit.
1353 */
1354 oopts = fd->options;
1355 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1356 for (; fdtp->heads; fdtp++) {
1357 fdsettype(fd, fdtp);
1358
1359 id.cyl = id.head = 0;
1360 rv = fdmisccmd(fd, BIO_RDID, &id);
1361 if (rv != 0)
1362 continue;
1363 if (id.cyl != 0 || id.head != 0 || id.secshift != fdtp->secsize)
1364 continue;
1365 id.cyl = 2;
1366 id.head = fd->ft->heads - 1;
1367 rv = fdmisccmd(fd, BIO_RDID, &id);
1368 if (id.cyl != 2 || id.head != fdtp->heads - 1 ||
1369 id.secshift != fdtp->secsize)
1370 continue;
1371 if (rv == 0)
1372 break;
1373 }
1374
1375 fd->options = oopts;
1376 if (fdtp->heads == 0) {
1377 if (debugflags & 0x40)
1378 device_printf(fd->dev, "autoselection failed\n");
1379 fdsettype(fd, fd_native_types[fd->type]);
1380 return (-1);
1381 } else {
1382 if (debugflags & 0x40) {
1383 device_printf(fd->dev,
1384 "autoselected %d KB medium\n",
1385 fd->ft->size / 2);
1386 fdprinttype(fd->ft);
1387 }
1388 return (0);
1389 }
1390 }
1391
1392 /*
1393 * GEOM class implementation
1394 */
1395
1396 static g_access_t fd_access;
1397 static g_start_t fd_start;
1398 static g_ioctl_t fd_ioctl;
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 };
1407
1408 static int
fd_access(struct g_provider * pp,int r,int w,int e)1409 fd_access(struct g_provider *pp, int r, int w, int e)
1410 {
1411 struct fd_data *fd;
1412 struct fdc_data *fdc;
1413 int ar, aw, ae;
1414 int busy;
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 device_unbusy(fd->dev);
1433 return (0);
1434 }
1435
1436 busy = 0;
1437 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) {
1438 if (fdmisccmd(fd, BIO_PROBE, NULL))
1439 return (ENXIO);
1440 if (fd->flags & FD_EMPTY)
1441 return (ENXIO);
1442 if (fd->flags & FD_NEWDISK) {
1443 if (fdautoselect(fd) != 0 &&
1444 (device_get_flags(fd->dev) & FD_NO_CHLINE)) {
1445 mtx_lock(&fdc->fdc_mtx);
1446 fd->flags |= FD_EMPTY;
1447 mtx_unlock(&fdc->fdc_mtx);
1448 return (ENXIO);
1449 }
1450 mtx_lock(&fdc->fdc_mtx);
1451 fd->flags &= ~FD_NEWDISK;
1452 mtx_unlock(&fdc->fdc_mtx);
1453 }
1454 device_busy(fd->dev);
1455 busy = 1;
1456 }
1457
1458 if (w > 0 && (fd->flags & FD_WP)) {
1459 if (busy)
1460 device_unbusy(fd->dev);
1461 return (EROFS);
1462 }
1463
1464 pp->sectorsize = fd->sectorsize;
1465 pp->stripesize = fd->ft->heads * fd->ft->sectrac * fd->sectorsize;
1466 pp->mediasize = pp->stripesize * fd->ft->tracks;
1467 return (0);
1468 }
1469
1470 static void
fd_start(struct bio * bp)1471 fd_start(struct bio *bp)
1472 {
1473 struct fdc_data * fdc;
1474 struct fd_data * fd;
1475
1476 fd = bp->bio_to->geom->softc;
1477 fdc = fd->fdc;
1478 bp->bio_driver1 = fd;
1479 if (bp->bio_cmd == BIO_GETATTR) {
1480 if (g_handleattr_int(bp, "GEOM::fwsectors", fd->ft->sectrac))
1481 return;
1482 if (g_handleattr_int(bp, "GEOM::fwheads", fd->ft->heads))
1483 return;
1484 g_io_deliver(bp, ENOIOCTL);
1485 return;
1486 }
1487 if (!(bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE)) {
1488 g_io_deliver(bp, EOPNOTSUPP);
1489 return;
1490 }
1491 bp->bio_pblkno = bp->bio_offset / fd->sectorsize;
1492 bp->bio_resid = bp->bio_length;
1493 fd_enqueue(fd, bp);
1494 return;
1495 }
1496
1497 static int
fd_ioctl(struct g_provider * pp,u_long cmd,void * data,int fflag,struct thread * td)1498 fd_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td)
1499 {
1500 struct fd_data *fd;
1501 struct fdc_status *fsp;
1502 struct fdc_readid *rid;
1503 int error;
1504
1505 fd = pp->geom->softc;
1506
1507 switch (cmd) {
1508 case FD_GTYPE: /* get drive type */
1509 *(struct fd_type *)data = *fd->ft;
1510 return (0);
1511
1512 case FD_STYPE: /* set drive type */
1513 /*
1514 * Allow setting drive type temporarily iff
1515 * currently unset. Used for fdformat so any
1516 * user can set it, and then start formatting.
1517 */
1518 fd->fts = *(struct fd_type *)data;
1519 if (fd->fts.sectrac) {
1520 /* XXX: check for rubbish */
1521 fdsettype(fd, &fd->fts);
1522 } else {
1523 fdsettype(fd, fd_native_types[fd->type]);
1524 }
1525 if (debugflags & 0x40)
1526 fdprinttype(fd->ft);
1527 return (0);
1528
1529 case FD_GOPTS: /* get drive options */
1530 *(int *)data = fd->options;
1531 return (0);
1532
1533 case FD_SOPTS: /* set drive options */
1534 fd->options = *(int *)data;
1535 return (0);
1536
1537 case FD_CLRERR:
1538 error = priv_check(td, PRIV_DRIVER);
1539 if (error)
1540 return (error);
1541 fd->fdc->fdc_errs = 0;
1542 return (0);
1543
1544 case FD_GSTAT:
1545 fsp = (struct fdc_status *)data;
1546 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
1547 return (EINVAL);
1548 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
1549 return (0);
1550
1551 case FD_GDTYPE:
1552 *(enum fd_drivetype *)data = fd->type;
1553 return (0);
1554
1555 case FD_FORM:
1556 if (!(fflag & FWRITE))
1557 return (EPERM);
1558 if (((struct fd_formb *)data)->format_version !=
1559 FD_FORMAT_VERSION)
1560 return (EINVAL); /* wrong version of formatting prog */
1561 error = fdmisccmd(fd, BIO_FMT, data);
1562 mtx_lock(&fd->fdc->fdc_mtx);
1563 fd->flags |= FD_NEWDISK;
1564 mtx_unlock(&fd->fdc->fdc_mtx);
1565 break;
1566
1567 case FD_READID:
1568 rid = (struct fdc_readid *)data;
1569 if (rid->cyl > 85 || rid->head > 1)
1570 return (EINVAL);
1571 error = fdmisccmd(fd, BIO_RDID, data);
1572 break;
1573
1574 case FIONBIO:
1575 case FIOASYNC:
1576 /* For backwards compat with old fd*(8) tools */
1577 error = 0;
1578 break;
1579
1580 default:
1581 if (debugflags & 0x80)
1582 printf("Unknown ioctl %lx\n", cmd);
1583 error = ENOIOCTL;
1584 break;
1585 }
1586 return (error);
1587 };
1588
1589
1590
1591 /*
1592 * Configuration/initialization stuff, per controller.
1593 */
1594
1595 devclass_t fdc_devclass;
1596 static devclass_t fd_devclass;
1597
1598 struct fdc_ivars {
1599 int fdunit;
1600 int fdtype;
1601 };
1602
1603 void
fdc_release_resources(struct fdc_data * fdc)1604 fdc_release_resources(struct fdc_data *fdc)
1605 {
1606 device_t dev;
1607 struct resource *last;
1608 int i;
1609
1610 dev = fdc->fdc_dev;
1611 if (fdc->fdc_intr)
1612 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1613 fdc->fdc_intr = NULL;
1614 if (fdc->res_irq != NULL)
1615 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
1616 fdc->res_irq);
1617 fdc->res_irq = NULL;
1618 last = NULL;
1619 for (i = 0; i < FDC_MAXREG; i++) {
1620 if (fdc->resio[i] != NULL && fdc->resio[i] != last) {
1621 bus_release_resource(dev, SYS_RES_IOPORT,
1622 fdc->ridio[i], fdc->resio[i]);
1623 last = fdc->resio[i];
1624 fdc->resio[i] = NULL;
1625 }
1626 }
1627 if (fdc->res_drq != NULL)
1628 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
1629 fdc->res_drq);
1630 fdc->res_drq = NULL;
1631 }
1632
1633 int
fdc_read_ivar(device_t dev,device_t child,int which,uintptr_t * result)1634 fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
1635 {
1636 struct fdc_ivars *ivars = device_get_ivars(child);
1637
1638 switch (which) {
1639 case FDC_IVAR_FDUNIT:
1640 *result = ivars->fdunit;
1641 break;
1642 case FDC_IVAR_FDTYPE:
1643 *result = ivars->fdtype;
1644 break;
1645 default:
1646 return (ENOENT);
1647 }
1648 return (0);
1649 }
1650
1651 int
fdc_write_ivar(device_t dev,device_t child,int which,uintptr_t value)1652 fdc_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
1653 {
1654 struct fdc_ivars *ivars = device_get_ivars(child);
1655
1656 switch (which) {
1657 case FDC_IVAR_FDUNIT:
1658 ivars->fdunit = value;
1659 break;
1660 case FDC_IVAR_FDTYPE:
1661 ivars->fdtype = value;
1662 break;
1663 default:
1664 return (ENOENT);
1665 }
1666 return (0);
1667 }
1668
1669 int
fdc_initial_reset(device_t dev,struct fdc_data * fdc)1670 fdc_initial_reset(device_t dev, struct fdc_data *fdc)
1671 {
1672 int ic_type, part_id;
1673
1674 /*
1675 * A status value of 0xff is very unlikely, but not theoretically
1676 * impossible, but it is far more likely to indicate an empty bus.
1677 */
1678 if (fdsts_rd(fdc) == 0xff)
1679 return (ENXIO);
1680
1681 /*
1682 * Assert a reset to the floppy controller and check that the status
1683 * register goes to zero.
1684 */
1685 fdout_wr(fdc, 0);
1686 fdout_wr(fdc, 0);
1687 if (fdsts_rd(fdc) != 0)
1688 return (ENXIO);
1689
1690 /*
1691 * Clear the reset and see it come ready.
1692 */
1693 fdout_wr(fdc, FDO_FRST);
1694 DELAY(100);
1695 if (fdsts_rd(fdc) != 0x80)
1696 return (ENXIO);
1697
1698 /* Then, see if it can handle a command. */
1699 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(6, 240),
1700 NE7_SPEC_2(31, 0), 0))
1701 return (ENXIO);
1702
1703 /*
1704 * Try to identify the chip.
1705 *
1706 * The i8272 datasheet documents that unknown commands
1707 * will return ST0 as 0x80. The i8272 is supposedly identical
1708 * to the NEC765.
1709 * The i82077SL datasheet says 0x90 for the VERSION command,
1710 * and several "superio" chips emulate this.
1711 */
1712 if (fdc_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type))
1713 return (ENXIO);
1714 if (fdc_cmd(fdc, 1, 0x18, 1, &part_id))
1715 return (ENXIO);
1716 if (bootverbose)
1717 device_printf(dev,
1718 "ic_type %02x part_id %02x\n", ic_type, part_id);
1719 switch (ic_type & 0xff) {
1720 case 0x80:
1721 device_set_desc(dev, "NEC 765 or clone");
1722 fdc->fdct = FDC_NE765;
1723 break;
1724 case 0x81:
1725 case 0x90:
1726 device_set_desc(dev,
1727 "Enhanced floppy controller");
1728 fdc->fdct = FDC_ENHANCED;
1729 break;
1730 default:
1731 device_set_desc(dev, "Generic floppy controller");
1732 fdc->fdct = FDC_UNKNOWN;
1733 break;
1734 }
1735 return (0);
1736 }
1737
1738 int
fdc_detach(device_t dev)1739 fdc_detach(device_t dev)
1740 {
1741 struct fdc_data *fdc;
1742 int error;
1743
1744 fdc = device_get_softc(dev);
1745
1746 /* have our children detached first */
1747 if ((error = bus_generic_detach(dev)))
1748 return (error);
1749
1750 if (fdc->fdc_intr)
1751 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1752 fdc->fdc_intr = NULL;
1753
1754 /* kill worker thread */
1755 mtx_lock(&fdc->fdc_mtx);
1756 fdc->flags |= FDC_KTHREAD_EXIT;
1757 wakeup(&fdc->head);
1758 while ((fdc->flags & FDC_KTHREAD_ALIVE) != 0)
1759 msleep(fdc->fdc_thread, &fdc->fdc_mtx, PRIBIO, "fdcdet", 0);
1760 mtx_unlock(&fdc->fdc_mtx);
1761
1762 /* reset controller, turn motor off */
1763 fdout_wr(fdc, 0);
1764
1765 if (!(fdc->flags & FDC_NODMA))
1766 isa_dma_release(fdc->dmachan);
1767 fdc_release_resources(fdc);
1768 mtx_destroy(&fdc->fdc_mtx);
1769 return (0);
1770 }
1771
1772 /*
1773 * Add a child device to the fdc controller. It will then be probed etc.
1774 */
1775 device_t
fdc_add_child(device_t dev,const char * name,int unit)1776 fdc_add_child(device_t dev, const char *name, int unit)
1777 {
1778 struct fdc_ivars *ivar;
1779 device_t child;
1780
1781 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO);
1782 if (ivar == NULL)
1783 return (NULL);
1784 child = device_add_child(dev, name, unit);
1785 if (child == NULL) {
1786 free(ivar, M_DEVBUF);
1787 return (NULL);
1788 }
1789 device_set_ivars(child, ivar);
1790 ivar->fdunit = unit;
1791 ivar->fdtype = FDT_NONE;
1792 if (resource_disabled(name, unit))
1793 device_disable(child);
1794 return (child);
1795 }
1796
1797 int
fdc_attach(device_t dev)1798 fdc_attach(device_t dev)
1799 {
1800 struct fdc_data *fdc;
1801 int error;
1802
1803 fdc = device_get_softc(dev);
1804 fdc->fdc_dev = dev;
1805 error = fdc_initial_reset(dev, fdc);
1806 if (error) {
1807 device_printf(dev, "does not respond\n");
1808 return (error);
1809 }
1810 error = bus_setup_intr(dev, fdc->res_irq,
1811 INTR_TYPE_BIO | INTR_ENTROPY |
1812 ((fdc->flags & FDC_NOFAST) ? INTR_MPSAFE : 0),
1813 ((fdc->flags & FDC_NOFAST) ? NULL : fdc_intr_fast),
1814 ((fdc->flags & FDC_NOFAST) ? fdc_intr : NULL),
1815 fdc, &fdc->fdc_intr);
1816 if (error) {
1817 device_printf(dev, "cannot setup interrupt\n");
1818 return (error);
1819 }
1820 if (!(fdc->flags & FDC_NODMA)) {
1821 error = isa_dma_acquire(fdc->dmachan);
1822 if (!error) {
1823 error = isa_dma_init(fdc->dmachan,
1824 MAX_BYTES_PER_CYL, M_WAITOK);
1825 if (error)
1826 isa_dma_release(fdc->dmachan);
1827 }
1828 if (error)
1829 return (error);
1830 }
1831 fdc->fdcu = device_get_unit(dev);
1832 fdc->flags |= FDC_NEEDS_RESET;
1833
1834 mtx_init(&fdc->fdc_mtx, "fdc lock", NULL, MTX_DEF);
1835
1836 /* reset controller, turn motor off, clear fdout mirror reg */
1837 fdout_wr(fdc, fdc->fdout = 0);
1838 bioq_init(&fdc->head);
1839
1840 settle = hz / 8;
1841
1842 return (0);
1843 }
1844
1845 void
fdc_start_worker(device_t dev)1846 fdc_start_worker(device_t dev)
1847 {
1848 struct fdc_data *fdc;
1849
1850 fdc = device_get_softc(dev);
1851 kproc_create(fdc_thread, fdc, &fdc->fdc_thread, 0, 0,
1852 "fdc%d", device_get_unit(dev));
1853 }
1854
1855 int
fdc_hints_probe(device_t dev)1856 fdc_hints_probe(device_t dev)
1857 {
1858 const char *name, *dname;
1859 int i, error, dunit;
1860
1861 /*
1862 * Probe and attach any children. We should probably detect
1863 * devices from the BIOS unless overridden.
1864 */
1865 name = device_get_nameunit(dev);
1866 i = 0;
1867 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) {
1868 resource_int_value(dname, dunit, "drive", &dunit);
1869 fdc_add_child(dev, dname, dunit);
1870 }
1871
1872 if ((error = bus_generic_attach(dev)) != 0)
1873 return (error);
1874 return (0);
1875 }
1876
1877 int
fdc_print_child(device_t me,device_t child)1878 fdc_print_child(device_t me, device_t child)
1879 {
1880 int retval = 0, flags;
1881
1882 retval += bus_print_child_header(me, child);
1883 retval += printf(" on %s drive %d", device_get_nameunit(me),
1884 fdc_get_fdunit(child));
1885 if ((flags = device_get_flags(me)) != 0)
1886 retval += printf(" flags %#x", flags);
1887 retval += printf("\n");
1888
1889 return (retval);
1890 }
1891
1892 /*
1893 * Configuration/initialization, per drive.
1894 */
1895 static int
fd_probe(device_t dev)1896 fd_probe(device_t dev)
1897 {
1898 #if defined(__i386__) || defined(__amd64__)
1899 int unit;
1900 #endif
1901 int i;
1902 u_int st0, st3;
1903 struct fd_data *fd;
1904 struct fdc_data *fdc;
1905 int fdsu;
1906 int flags, type;
1907
1908 fdsu = fdc_get_fdunit(dev);
1909 fd = device_get_softc(dev);
1910 fdc = device_get_softc(device_get_parent(dev));
1911 flags = device_get_flags(dev);
1912
1913 fd->dev = dev;
1914 fd->fdc = fdc;
1915 fd->fdsu = fdsu;
1916
1917 /* Auto-probe if fdinfo is present, but always allow override. */
1918 type = flags & FD_TYPEMASK;
1919 if (type == FDT_NONE && (type = fdc_get_fdtype(dev)) != FDT_NONE) {
1920 fd->type = type;
1921 goto done;
1922 } else {
1923 /* make sure fdautoselect() will be called */
1924 fd->flags = FD_EMPTY;
1925 fd->type = type;
1926 }
1927
1928 #if defined(__i386__) || defined(__amd64__)
1929 unit = device_get_unit(dev);
1930 if (fd->type == FDT_NONE && (unit == 0 || unit == 1)) {
1931 /* Look up what the BIOS thinks we have. */
1932 if (unit == 0)
1933 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4;
1934 else
1935 fd->type = rtcin(RTC_FDISKETTE) & 0x0f;
1936 if (fd->type == FDT_288M_1)
1937 fd->type = FDT_288M;
1938 }
1939 #endif /* __i386__ || __amd64__ */
1940 /* is there a unit? */
1941 if (fd->type == FDT_NONE)
1942 return (ENXIO);
1943
1944 mtx_lock(&fdc->fdc_mtx);
1945
1946 /* select it */
1947 fd_select(fd);
1948 fd_motor(fd, 1);
1949 fdc->fd = fd;
1950 fdc_reset(fdc); /* XXX reset, then unreset, etc. */
1951 DELAY(1000000); /* 1 sec */
1952
1953 if ((flags & FD_NO_PROBE) == 0) {
1954 /* If we're at track 0 first seek inwards. */
1955 if ((fdc_sense_drive(fdc, &st3) == 0) &&
1956 (st3 & NE7_ST3_T0)) {
1957 /* Seek some steps... */
1958 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
1959 /* ...wait a moment... */
1960 DELAY(300000);
1961 /* make ctrlr happy: */
1962 fdc_sense_int(fdc, NULL, NULL);
1963 }
1964 }
1965
1966 for (i = 0; i < 2; i++) {
1967 /*
1968 * we must recalibrate twice, just in case the
1969 * heads have been beyond cylinder 76, since
1970 * most FDCs still barf when attempting to
1971 * recalibrate more than 77 steps
1972 */
1973 /* go back to 0: */
1974 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
1975 /* a second being enough for full stroke seek*/
1976 DELAY(i == 0 ? 1000000 : 300000);
1977
1978 /* anything responding? */
1979 if (fdc_sense_int(fdc, &st0, NULL) == 0 &&
1980 (st0 & NE7_ST0_EC) == 0)
1981 break; /* already probed successfully */
1982 }
1983 }
1984 }
1985
1986 fd_motor(fd, 0);
1987 fdc->fd = NULL;
1988 mtx_unlock(&fdc->fdc_mtx);
1989
1990 if ((flags & FD_NO_PROBE) == 0 &&
1991 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */
1992 return (ENXIO);
1993
1994 done:
1995
1996 switch (fd->type) {
1997 case FDT_12M:
1998 device_set_desc(dev, "1200-KB 5.25\" drive");
1999 break;
2000 case FDT_144M:
2001 device_set_desc(dev, "1440-KB 3.5\" drive");
2002 break;
2003 case FDT_288M:
2004 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
2005 break;
2006 case FDT_360K:
2007 device_set_desc(dev, "360-KB 5.25\" drive");
2008 break;
2009 case FDT_720K:
2010 device_set_desc(dev, "720-KB 3.5\" drive");
2011 break;
2012 default:
2013 return (ENXIO);
2014 }
2015 fd->track = FD_NO_TRACK;
2016 fd->fdc = fdc;
2017 fd->fdsu = fdsu;
2018 fd->options = 0;
2019 callout_init_mtx(&fd->toffhandle, &fd->fdc->fdc_mtx, 0);
2020
2021 /* initialize densities for subdevices */
2022 fdsettype(fd, fd_native_types[fd->type]);
2023 return (0);
2024 }
2025
2026 /*
2027 * We have to do this in a geom event because GEOM is not running
2028 * when fd_attach() is.
2029 * XXX: move fd_attach after geom like ata/scsi disks
2030 */
2031 static void
fd_attach2(void * arg,int flag)2032 fd_attach2(void *arg, int flag)
2033 {
2034 struct fd_data *fd;
2035
2036 fd = arg;
2037
2038 fd->fd_geom = g_new_geomf(&g_fd_class,
2039 "fd%d", device_get_unit(fd->dev));
2040 fd->fd_provider = g_new_providerf(fd->fd_geom, "%s", fd->fd_geom->name);
2041 fd->fd_geom->softc = fd;
2042 g_error_provider(fd->fd_provider, 0);
2043 }
2044
2045 static int
fd_attach(device_t dev)2046 fd_attach(device_t dev)
2047 {
2048 struct fd_data *fd;
2049
2050 fd = device_get_softc(dev);
2051 g_post_event(fd_attach2, fd, M_WAITOK, NULL);
2052 fd->flags |= FD_EMPTY;
2053 bioq_init(&fd->fd_bq);
2054
2055 return (0);
2056 }
2057
2058 static void
fd_detach_geom(void * arg,int flag)2059 fd_detach_geom(void *arg, int flag)
2060 {
2061 struct fd_data *fd = arg;
2062
2063 g_topology_assert();
2064 g_wither_geom(fd->fd_geom, ENXIO);
2065 }
2066
2067 static int
fd_detach(device_t dev)2068 fd_detach(device_t dev)
2069 {
2070 struct fd_data *fd;
2071
2072 fd = device_get_softc(dev);
2073 g_waitfor_event(fd_detach_geom, fd, M_WAITOK, NULL);
2074 while (device_get_state(dev) == DS_BUSY)
2075 tsleep(fd, PZERO, "fdd", hz/10);
2076 callout_drain(&fd->toffhandle);
2077
2078 return (0);
2079 }
2080
2081 static device_method_t fd_methods[] = {
2082 /* Device interface */
2083 DEVMETHOD(device_probe, fd_probe),
2084 DEVMETHOD(device_attach, fd_attach),
2085 DEVMETHOD(device_detach, fd_detach),
2086 DEVMETHOD(device_shutdown, bus_generic_shutdown),
2087 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
2088 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
2089 { 0, 0 }
2090 };
2091
2092 static driver_t fd_driver = {
2093 "fd",
2094 fd_methods,
2095 sizeof(struct fd_data)
2096 };
2097
2098 static int
fdc_modevent(module_t mod,int type,void * data)2099 fdc_modevent(module_t mod, int type, void *data)
2100 {
2101
2102 return (g_modevent(NULL, type, &g_fd_class));
2103 }
2104
2105 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, fdc_modevent, 0);
2106