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 */
52
53 #include <sys/cdefs.h>
54 #include "opt_fdc.h"
55
56 #include <sys/param.h>
57 #include <sys/bio.h>
58 #include <sys/bus.h>
59 #include <sys/devicestat.h>
60 #include <sys/disk.h>
61 #include <sys/fcntl.h>
62 #include <sys/fdcio.h>
63 #include <sys/filio.h>
64 #include <sys/kernel.h>
65 #include <sys/kthread.h>
66 #include <sys/lock.h>
67 #include <sys/malloc.h>
68 #include <sys/module.h>
69 #include <sys/mutex.h>
70 #include <sys/priv.h>
71 #include <sys/proc.h>
72 #include <sys/rman.h>
73 #include <sys/sysctl.h>
74 #include <sys/systm.h>
75
76 #include <geom/geom.h>
77
78 #include <machine/bus.h>
79 #include <machine/clock.h>
80 #include <machine/stdarg.h>
81
82 #include <isa/isavar.h>
83 #include <isa/isareg.h>
84 #include <isa/rtc.h>
85 #include <dev/fdc/fdcvar.h>
86
87 #include <dev/ic/nec765.h>
88
89 /*
90 * Runtime configuration hints/flags
91 */
92
93 /* configuration flags for fd */
94 #define FD_TYPEMASK 0x0f /* drive type, matches enum
95 * fd_drivetype; on i386 machines, if
96 * given as 0, use RTC type for fd0
97 * and fd1 */
98 #define FD_NO_CHLINE 0x10 /* drive does not support changeline
99 * aka. unit attention */
100 #define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just
101 * assume it is there */
102
103 /*
104 * Things that could conceiveably considered parameters or tweakables
105 */
106
107 /*
108 * Maximal number of bytes in a cylinder.
109 * This is used for ISADMA bouncebuffer allocation and sets the max
110 * xfersize we support.
111 *
112 * 2.88M format has 2 x 36 x 512, allow for hacked up density.
113 */
114 #define MAX_BYTES_PER_CYL (2 * 40 * 512)
115
116 /*
117 * Timeout value for the PIO loops to wait until the FDC main status
118 * register matches our expectations (request for master, direction
119 * bit). This is supposed to be a number of microseconds, although
120 * timing might actually not be very accurate.
121 *
122 * Timeouts of 100 msec are believed to be required for some broken
123 * (old) hardware.
124 */
125 #define FDSTS_TIMEOUT 100000
126
127 /*
128 * After this many errors, stop whining. Close will reset this count.
129 */
130 #define FDC_ERRMAX 100
131
132 /*
133 * AutoDensity search lists for each drive type.
134 */
135
136 static struct fd_type fd_searchlist_360k[] = {
137 { FDF_5_360 },
138 { 0 }
139 };
140
141 static struct fd_type fd_searchlist_12m[] = {
142 { FDF_5_1200 | FL_AUTO },
143 { FDF_5_400 | FL_AUTO },
144 { FDF_5_360 | FL_2STEP | FL_AUTO},
145 { 0 }
146 };
147
148 static struct fd_type fd_searchlist_720k[] = {
149 { FDF_3_720 },
150 { 0 }
151 };
152
153 static struct fd_type fd_searchlist_144m[] = {
154 { FDF_3_1440 | FL_AUTO},
155 { FDF_3_720 | FL_AUTO},
156 { 0 }
157 };
158
159 static struct fd_type fd_searchlist_288m[] = {
160 { FDF_3_1440 | FL_AUTO },
161 #if 0
162 { FDF_3_2880 | FL_AUTO }, /* XXX: probably doesn't work */
163 #endif
164 { FDF_3_720 | FL_AUTO},
165 { 0 }
166 };
167
168 /*
169 * Order must match enum fd_drivetype in <sys/fdcio.h>.
170 */
171 static struct fd_type *fd_native_types[] = {
172 NULL, /* FDT_NONE */
173 fd_searchlist_360k, /* FDT_360K */
174 fd_searchlist_12m, /* FDT_12M */
175 fd_searchlist_720k, /* FDT_720K */
176 fd_searchlist_144m, /* FDT_144M */
177 fd_searchlist_288m, /* FDT_288M_1 (mapped to FDT_288M) */
178 fd_searchlist_288m, /* FDT_288M */
179 };
180
181 /*
182 * Internals start here
183 */
184
185 /* registers */
186 #define FDOUT 2 /* Digital Output Register (W) */
187 #define FDO_FDSEL 0x03 /* floppy device select */
188 #define FDO_FRST 0x04 /* floppy controller reset */
189 #define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */
190 #define FDO_MOEN0 0x10 /* motor enable drive 0 */
191 #define FDO_MOEN1 0x20 /* motor enable drive 1 */
192 #define FDO_MOEN2 0x40 /* motor enable drive 2 */
193 #define FDO_MOEN3 0x80 /* motor enable drive 3 */
194
195 #define FDSTS 4 /* NEC 765 Main Status Register (R) */
196 #define FDDSR 4 /* Data Rate Select Register (W) */
197 #define FDDATA 5 /* NEC 765 Data Register (R/W) */
198 #define FDCTL 7 /* Control Register (W) */
199
200 /*
201 * The YE-DATA PC Card floppies use PIO to read in the data rather
202 * than DMA due to the wild variability of DMA for the PC Card
203 * devices. DMA was deleted from the PC Card specification in version
204 * 7.2 of the standard, but that post-dates the YE-DATA devices by many
205 * years.
206 *
207 * In addition, if we cannot setup the DMA resources for the ISA
208 * attachment, we'll use this same offset for data transfer. However,
209 * that almost certainly won't work.
210 *
211 * For this mode, offset 0 and 1 must be used to setup the transfer
212 * for this floppy. This is OK for PC Card YE Data devices, but for
213 * ISA this is likely wrong. These registers are only available on
214 * those systems that map them to the floppy drive. Newer systems do
215 * not do this, and we should likely prohibit access to them (or
216 * disallow NODMA to be set).
217 */
218 #define FDBCDR 0 /* And 1 */
219 #define FD_YE_DATAPORT 6 /* Drive Data port */
220
221 #define FDI_DCHG 0x80 /* diskette has been changed */
222 /* requires drive and motor being selected */
223 /* is cleared by any step pulse to drive */
224
225 /*
226 * We have three private BIO commands.
227 */
228 #define BIO_PROBE BIO_CMD0
229 #define BIO_RDID BIO_CMD1
230 #define BIO_FMT BIO_CMD2
231
232 /*
233 * Per drive structure (softc).
234 */
235 struct fd_data {
236 u_char *fd_ioptr; /* IO pointer */
237 u_int fd_iosize; /* Size of IO chunks */
238 u_int fd_iocount; /* Outstanding requests */
239 struct fdc_data *fdc; /* pointer to controller structure */
240 int fdsu; /* this units number on this controller */
241 enum fd_drivetype type; /* drive type */
242 struct fd_type *ft; /* pointer to current type descriptor */
243 struct fd_type fts; /* type descriptors */
244 int sectorsize;
245 int flags;
246 #define FD_WP (1<<0) /* Write protected */
247 #define FD_MOTOR (1<<1) /* motor should be on */
248 #define FD_MOTORWAIT (1<<2) /* motor should be on */
249 #define FD_EMPTY (1<<3) /* no media */
250 #define FD_NEWDISK (1<<4) /* media changed */
251 #define FD_ISADMA (1<<5) /* isa dma started */
252 int track; /* where we think the head is */
253 #define FD_NO_TRACK -2
254 int options; /* FDOPT_* */
255 struct callout toffhandle;
256 struct g_geom *fd_geom;
257 struct g_provider *fd_provider;
258 device_t dev;
259 struct bio_queue_head fd_bq;
260 bool gone;
261 };
262
263 #define FD_NOT_VALID -2
264
265 static driver_intr_t fdc_intr;
266 static driver_filter_t fdc_intr_fast;
267 static void fdc_reset(struct fdc_data *);
268 static int fd_probe_disk(struct fd_data *, int *);
269
270 static SYSCTL_NODE(_debug, OID_AUTO, fdc, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
271 "fdc driver");
272
273 static int fifo_threshold = 8;
274 SYSCTL_INT(_debug_fdc, OID_AUTO, fifo, CTLFLAG_RW, &fifo_threshold, 0,
275 "FIFO threshold setting");
276
277 static int debugflags = 0;
278 SYSCTL_INT(_debug_fdc, OID_AUTO, debugflags, CTLFLAG_RW, &debugflags, 0,
279 "Debug flags");
280
281 static int retries = 10;
282 SYSCTL_INT(_debug_fdc, OID_AUTO, retries, CTLFLAG_RW, &retries, 0,
283 "Number of retries to attempt");
284
285 static int spec1 = NE7_SPEC_1(6, 240);
286 SYSCTL_INT(_debug_fdc, OID_AUTO, spec1, CTLFLAG_RW, &spec1, 0,
287 "Specification byte one (step-rate + head unload)");
288
289 static int spec2 = NE7_SPEC_2(16, 0);
290 SYSCTL_INT(_debug_fdc, OID_AUTO, spec2, CTLFLAG_RW, &spec2, 0,
291 "Specification byte two (head load time + no-dma)");
292
293 static int settle;
294 SYSCTL_INT(_debug_fdc, OID_AUTO, settle, CTLFLAG_RW, &settle, 0,
295 "Head settling time in sec/hz");
296
297 static void
fdprinttype(struct fd_type * ft)298 fdprinttype(struct fd_type *ft)
299 {
300
301 printf("(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,0x%x)",
302 ft->sectrac, ft->secsize, ft->datalen, ft->gap, ft->tracks,
303 ft->size, ft->trans, ft->heads, ft->f_gap, ft->f_inter,
304 ft->offset_side2, ft->flags);
305 }
306
307 static void
fdsettype(struct fd_data * fd,struct fd_type * ft)308 fdsettype(struct fd_data *fd, struct fd_type *ft)
309 {
310 fd->ft = ft;
311 ft->size = ft->sectrac * ft->heads * ft->tracks;
312 fd->sectorsize = 128 << fd->ft->secsize;
313 }
314
315 /*
316 * Bus space handling (access to low-level IO).
317 */
318 static inline void
fdregwr(struct fdc_data * fdc,int reg,uint8_t v)319 fdregwr(struct fdc_data *fdc, int reg, uint8_t v)
320 {
321
322 bus_space_write_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg], v);
323 }
324
325 static inline uint8_t
fdregrd(struct fdc_data * fdc,int reg)326 fdregrd(struct fdc_data *fdc, int reg)
327 {
328
329 return bus_space_read_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg]);
330 }
331
332 static void
fdctl_wr(struct fdc_data * fdc,u_int8_t v)333 fdctl_wr(struct fdc_data *fdc, u_int8_t v)
334 {
335
336 fdregwr(fdc, FDCTL, v);
337 }
338
339 static void
fdout_wr(struct fdc_data * fdc,u_int8_t v)340 fdout_wr(struct fdc_data *fdc, u_int8_t v)
341 {
342
343 fdregwr(fdc, FDOUT, v);
344 }
345
346 static u_int8_t
fdsts_rd(struct fdc_data * fdc)347 fdsts_rd(struct fdc_data *fdc)
348 {
349
350 return fdregrd(fdc, FDSTS);
351 }
352
353 static void
fddsr_wr(struct fdc_data * fdc,u_int8_t v)354 fddsr_wr(struct fdc_data *fdc, u_int8_t v)
355 {
356
357 fdregwr(fdc, FDDSR, v);
358 }
359
360 static void
fddata_wr(struct fdc_data * fdc,u_int8_t v)361 fddata_wr(struct fdc_data *fdc, u_int8_t v)
362 {
363
364 fdregwr(fdc, FDDATA, v);
365 }
366
367 static u_int8_t
fddata_rd(struct fdc_data * fdc)368 fddata_rd(struct fdc_data *fdc)
369 {
370
371 return fdregrd(fdc, FDDATA);
372 }
373
374 static u_int8_t
fdin_rd(struct fdc_data * fdc)375 fdin_rd(struct fdc_data *fdc)
376 {
377
378 return fdregrd(fdc, FDCTL);
379 }
380
381 /*
382 * Magic pseudo-DMA initialization for YE FDC. Sets count and
383 * direction.
384 */
385 static void
fdbcdr_wr(struct fdc_data * fdc,int iswrite,uint16_t count)386 fdbcdr_wr(struct fdc_data *fdc, int iswrite, uint16_t count)
387 {
388 fdregwr(fdc, FDBCDR, (count - 1) & 0xff);
389 fdregwr(fdc, FDBCDR + 1,
390 (iswrite ? 0x80 : 0) | (((count - 1) >> 8) & 0x7f));
391 }
392
393 static int
fdc_err(struct fdc_data * fdc,const char * s)394 fdc_err(struct fdc_data *fdc, const char *s)
395 {
396 fdc->fdc_errs++;
397 if (s) {
398 if (fdc->fdc_errs < FDC_ERRMAX)
399 device_printf(fdc->fdc_dev, "%s", s);
400 else if (fdc->fdc_errs == FDC_ERRMAX)
401 device_printf(fdc->fdc_dev, "too many errors, not "
402 "logging any more\n");
403 }
404
405 return (1);
406 }
407
408 /*
409 * FDC IO functions, take care of the main status register, timeout
410 * in case the desired status bits are never set.
411 *
412 * These PIO loops initially start out with short delays between
413 * each iteration in the expectation that the required condition
414 * is usually met quickly, so it can be handled immediately.
415 */
416 static int
fdc_in(struct fdc_data * fdc,int * ptr)417 fdc_in(struct fdc_data *fdc, int *ptr)
418 {
419 int i, j, step;
420
421 step = 1;
422 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
423 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
424 if (i == (NE7_DIO|NE7_RQM)) {
425 i = fddata_rd(fdc);
426 if (ptr)
427 *ptr = i;
428 return (0);
429 }
430 if (i == NE7_RQM)
431 return (fdc_err(fdc, "ready for output in input\n"));
432 step += step;
433 DELAY(step);
434 }
435 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
436 }
437
438 static int
fdc_out(struct fdc_data * fdc,int x)439 fdc_out(struct fdc_data *fdc, int x)
440 {
441 int i, j, step;
442
443 step = 1;
444 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
445 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
446 if (i == NE7_RQM) {
447 fddata_wr(fdc, x);
448 return (0);
449 }
450 if (i == (NE7_DIO|NE7_RQM))
451 return (fdc_err(fdc, "ready for input in output\n"));
452 step += step;
453 DELAY(step);
454 }
455 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
456 }
457
458 /*
459 * fdc_cmd: Send a command to the chip.
460 * Takes a varargs with this structure:
461 * # of output bytes
462 * output bytes as int [...]
463 * # of input bytes
464 * input bytes as int* [...]
465 */
466 static int
fdc_cmd(struct fdc_data * fdc,int n_out,...)467 fdc_cmd(struct fdc_data *fdc, int n_out, ...)
468 {
469 u_char cmd = 0;
470 int n_in;
471 int n, i;
472 va_list ap;
473
474 va_start(ap, n_out);
475 for (n = 0; n < n_out; n++) {
476 i = va_arg(ap, int);
477 if (n == 0)
478 cmd = i;
479 if (fdc_out(fdc, i) < 0) {
480 char msg[50];
481 snprintf(msg, sizeof(msg),
482 "cmd %x failed at out byte %d of %d\n",
483 cmd, n + 1, n_out);
484 fdc->flags |= FDC_NEEDS_RESET;
485 va_end(ap);
486 return fdc_err(fdc, msg);
487 }
488 }
489 n_in = va_arg(ap, int);
490 for (n = 0; n < n_in; n++) {
491 int *ptr = va_arg(ap, int *);
492 if (fdc_in(fdc, ptr) != 0) {
493 char msg[50];
494 snprintf(msg, sizeof(msg),
495 "cmd %02x failed at in byte %d of %d\n",
496 cmd, n + 1, n_in);
497 fdc->flags |= FDC_NEEDS_RESET;
498 va_end(ap);
499 return fdc_err(fdc, msg);
500 }
501 }
502 va_end(ap);
503 return (0);
504 }
505
506 static void
fdc_reset(struct fdc_data * fdc)507 fdc_reset(struct fdc_data *fdc)
508 {
509 int i, r[10];
510
511 if (fdc->fdct == FDC_ENHANCED) {
512 /* Try a software reset, default precomp, and 500 kb/s */
513 fddsr_wr(fdc, I8207X_DSR_SR);
514 } else {
515 /* Try a hardware reset, keep motor on */
516 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
517 DELAY(100);
518 /* enable FDC, but defer interrupts a moment */
519 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
520 }
521 DELAY(100);
522 fdout_wr(fdc, fdc->fdout);
523
524 /* XXX after a reset, silently believe the FDC will accept commands */
525 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, spec1, spec2, 0))
526 device_printf(fdc->fdc_dev, " SPECIFY failed in reset\n");
527
528 if (fdc->fdct == FDC_ENHANCED) {
529 if (fdc_cmd(fdc, 4,
530 I8207X_CONFIG,
531 0,
532 /* 0x40 | */ /* Enable Implied Seek -
533 * breaks 2step! */
534 0x10 | /* Polling disabled */
535 (fifo_threshold - 1), /* Fifo threshold */
536 0x00, /* Precomp track */
537 0))
538 device_printf(fdc->fdc_dev,
539 " CONFIGURE failed in reset\n");
540 if (debugflags & 1) {
541 if (fdc_cmd(fdc, 1,
542 I8207X_DUMPREG,
543 10, &r[0], &r[1], &r[2], &r[3], &r[4],
544 &r[5], &r[6], &r[7], &r[8], &r[9]))
545 device_printf(fdc->fdc_dev,
546 " DUMPREG failed in reset\n");
547 for (i = 0; i < 10; i++)
548 printf(" %02x", r[i]);
549 printf("\n");
550 }
551 }
552 }
553
554 static int
fdc_sense_drive(struct fdc_data * fdc,int * st3p)555 fdc_sense_drive(struct fdc_data *fdc, int *st3p)
556 {
557 int st3;
558
559 if (fdc_cmd(fdc, 2, NE7CMD_SENSED, fdc->fd->fdsu, 1, &st3))
560 return (fdc_err(fdc, "Sense Drive Status failed\n"));
561 if (st3p)
562 *st3p = st3;
563 return (0);
564 }
565
566 static int
fdc_sense_int(struct fdc_data * fdc,int * st0p,int * cylp)567 fdc_sense_int(struct fdc_data *fdc, int *st0p, int *cylp)
568 {
569 int cyl, st0, ret;
570
571 ret = fdc_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
572 if (ret) {
573 (void)fdc_err(fdc, "sense intr err reading stat reg 0\n");
574 return (ret);
575 }
576
577 if (st0p)
578 *st0p = st0;
579
580 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
581 /*
582 * There doesn't seem to have been an interrupt.
583 */
584 return (FD_NOT_VALID);
585 }
586
587 if (fdc_in(fdc, &cyl) != 0)
588 return fdc_err(fdc, "can't get cyl num\n");
589
590 if (cylp)
591 *cylp = cyl;
592
593 return (0);
594 }
595
596 static int
fdc_read_status(struct fdc_data * fdc)597 fdc_read_status(struct fdc_data *fdc)
598 {
599 int i, ret, status;
600
601 for (i = ret = 0; i < 7; i++) {
602 ret = fdc_in(fdc, &status);
603 fdc->status[i] = status;
604 if (ret != 0)
605 break;
606 }
607
608 if (ret == 0)
609 fdc->flags |= FDC_STAT_VALID;
610 else
611 fdc->flags &= ~FDC_STAT_VALID;
612
613 return ret;
614 }
615
616 /*
617 * Select this drive
618 */
619 static void
fd_select(struct fd_data * fd)620 fd_select(struct fd_data *fd)
621 {
622 struct fdc_data *fdc;
623
624 /* XXX: lock controller */
625 fdc = fd->fdc;
626 fdc->fdout &= ~FDO_FDSEL;
627 fdc->fdout |= FDO_FDMAEN | FDO_FRST | fd->fdsu;
628 fdout_wr(fdc, fdc->fdout);
629 }
630
631 static void
fd_turnon(void * arg)632 fd_turnon(void *arg)
633 {
634 struct fd_data *fd;
635 struct bio *bp;
636 int once;
637
638 fd = arg;
639 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
640 fd->flags &= ~FD_MOTORWAIT;
641 fd->flags |= FD_MOTOR;
642 once = 0;
643 for (;;) {
644 bp = bioq_takefirst(&fd->fd_bq);
645 if (bp == NULL)
646 break;
647 bioq_disksort(&fd->fdc->head, bp);
648 once = 1;
649 }
650 if (once)
651 wakeup(&fd->fdc->head);
652 }
653
654 static void
fd_motor(struct fd_data * fd,int turnon)655 fd_motor(struct fd_data *fd, int turnon)
656 {
657 struct fdc_data *fdc;
658
659 fdc = fd->fdc;
660 /*
661 mtx_assert(&fdc->fdc_mtx, MA_OWNED);
662 */
663 if (turnon) {
664 fd->flags |= FD_MOTORWAIT;
665 fdc->fdout |= (FDO_MOEN0 << fd->fdsu);
666 callout_reset(&fd->toffhandle, hz, fd_turnon, fd);
667 } else {
668 callout_stop(&fd->toffhandle);
669 fd->flags &= ~(FD_MOTOR|FD_MOTORWAIT);
670 fdc->fdout &= ~(FDO_MOEN0 << fd->fdsu);
671 }
672 fdout_wr(fdc, fdc->fdout);
673 }
674
675 static void
fd_turnoff(void * xfd)676 fd_turnoff(void *xfd)
677 {
678 struct fd_data *fd = xfd;
679
680 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
681 fd_motor(fd, 0);
682 }
683
684 /*
685 * fdc_intr - wake up the worker thread.
686 */
687
688 static void
fdc_intr(void * arg)689 fdc_intr(void *arg)
690 {
691
692 wakeup(arg);
693 }
694
695 static int
fdc_intr_fast(void * arg)696 fdc_intr_fast(void *arg)
697 {
698
699 wakeup(arg);
700 return(FILTER_HANDLED);
701 }
702
703 /*
704 * fdc_pio(): perform programmed IO read/write for YE PCMCIA floppy.
705 */
706 static void
fdc_pio(struct fdc_data * fdc)707 fdc_pio(struct fdc_data *fdc)
708 {
709 u_char *cptr;
710 struct bio *bp;
711 u_int count;
712
713 bp = fdc->bp;
714 cptr = fdc->fd->fd_ioptr;
715 count = fdc->fd->fd_iosize;
716
717 if (bp->bio_cmd == BIO_READ) {
718 fdbcdr_wr(fdc, 0, count);
719 bus_space_read_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
720 fdc->ioff[FD_YE_DATAPORT], cptr, count);
721 } else {
722 bus_space_write_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
723 fdc->ioff[FD_YE_DATAPORT], cptr, count);
724 fdbcdr_wr(fdc, 0, count); /* needed? */
725 }
726 }
727
728 static int
fdc_biodone(struct fdc_data * fdc,int error)729 fdc_biodone(struct fdc_data *fdc, int error)
730 {
731 struct fd_data *fd;
732 struct bio *bp;
733
734 fd = fdc->fd;
735 bp = fdc->bp;
736
737 mtx_lock(&fdc->fdc_mtx);
738 if (--fd->fd_iocount == 0)
739 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
740 fdc->bp = NULL;
741 fdc->fd = NULL;
742 mtx_unlock(&fdc->fdc_mtx);
743 if (bp->bio_to != NULL) {
744 if ((debugflags & 2) && fd->fdc->retry > 0)
745 printf("retries: %d\n", fd->fdc->retry);
746 g_io_deliver(bp, error);
747 return (0);
748 }
749 bp->bio_error = error;
750 bp->bio_flags |= BIO_DONE;
751 wakeup(bp);
752 return (0);
753 }
754
755 static int retry_line;
756
757 static int
fdc_worker(struct fdc_data * fdc)758 fdc_worker(struct fdc_data *fdc)
759 {
760 struct fd_data *fd;
761 struct bio *bp;
762 int i, nsect;
763 int st0, st3, cyl, mfm, steptrac, cylinder, descyl, sec;
764 int head;
765 int override_error;
766 static int need_recal;
767 struct fdc_readid *idp;
768 struct fd_formb *finfo;
769
770 override_error = 0;
771
772 /* Have we exhausted our retries ? */
773 bp = fdc->bp;
774 fd = fdc->fd;
775 if (bp != NULL &&
776 (fdc->retry >= retries || (fd->options & FDOPT_NORETRY))) {
777 if ((debugflags & 4))
778 printf("Too many retries (EIO)\n");
779 if (fdc->flags & FDC_NEEDS_RESET) {
780 mtx_lock(&fdc->fdc_mtx);
781 fd->flags |= FD_EMPTY;
782 mtx_unlock(&fdc->fdc_mtx);
783 }
784 return (fdc_biodone(fdc, EIO));
785 }
786
787 /* Disable ISADMA if we bailed while it was active */
788 if (fd != NULL && (fd->flags & FD_ISADMA)) {
789 isa_dmadone(
790 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
791 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
792 mtx_lock(&fdc->fdc_mtx);
793 fd->flags &= ~FD_ISADMA;
794 mtx_unlock(&fdc->fdc_mtx);
795 }
796
797 /* Unwedge the controller ? */
798 if (fdc->flags & FDC_NEEDS_RESET) {
799 fdc->flags &= ~FDC_NEEDS_RESET;
800 fdc_reset(fdc);
801 if (cold)
802 DELAY(1000000);
803 else
804 tsleep(fdc, PRIBIO, "fdcrst", hz);
805 /* Discard results */
806 for (i = 0; i < 4; i++)
807 fdc_sense_int(fdc, &st0, &cyl);
808 /* All drives must recal */
809 need_recal = 0xf;
810 }
811
812 /* Pick up a request, if need be wait for it */
813 if (fdc->bp == NULL) {
814 mtx_lock(&fdc->fdc_mtx);
815 do {
816 fdc->bp = bioq_takefirst(&fdc->head);
817 if (fdc->bp == NULL)
818 msleep(&fdc->head, &fdc->fdc_mtx,
819 PRIBIO, "-", 0);
820 } while (fdc->bp == NULL &&
821 (fdc->flags & FDC_KTHREAD_EXIT) == 0);
822 mtx_unlock(&fdc->fdc_mtx);
823
824 if (fdc->bp == NULL)
825 /*
826 * Nothing to do, worker thread has been
827 * requested to stop.
828 */
829 return (0);
830
831 bp = fdc->bp;
832 fd = fdc->fd = bp->bio_driver1;
833 fdc->retry = 0;
834 fd->fd_ioptr = bp->bio_data;
835 if (bp->bio_cmd == BIO_FMT) {
836 i = offsetof(struct fd_formb, fd_formb_cylno(0));
837 fd->fd_ioptr += i;
838 fd->fd_iosize = bp->bio_length - i;
839 }
840 }
841
842 /* Select drive, setup params */
843 fd_select(fd);
844 if (fdc->fdct == FDC_ENHANCED)
845 fddsr_wr(fdc, fd->ft->trans);
846 else
847 fdctl_wr(fdc, fd->ft->trans);
848
849 if (bp->bio_cmd == BIO_PROBE) {
850 if ((!(device_get_flags(fd->dev) & FD_NO_CHLINE) &&
851 !(fdin_rd(fdc) & FDI_DCHG) &&
852 !(fd->flags & FD_EMPTY)) ||
853 fd_probe_disk(fd, &need_recal) == 0)
854 return (fdc_biodone(fdc, 0));
855 return (1);
856 }
857
858 /*
859 * If we are dead just flush the requests
860 */
861 if (fd->flags & FD_EMPTY)
862 return (fdc_biodone(fdc, ENXIO));
863
864 /* Check if we lost our media */
865 if (fdin_rd(fdc) & FDI_DCHG) {
866 if (debugflags & 0x40)
867 printf("Lost disk\n");
868 mtx_lock(&fdc->fdc_mtx);
869 fd->flags |= FD_EMPTY;
870 fd->flags |= FD_NEWDISK;
871 mtx_unlock(&fdc->fdc_mtx);
872 g_topology_lock();
873 g_orphan_provider(fd->fd_provider, ENXIO);
874 fd->fd_provider->flags |= G_PF_WITHER;
875 fd->fd_provider =
876 g_new_providerf(fd->fd_geom, "%s", fd->fd_geom->name);
877 g_error_provider(fd->fd_provider, 0);
878 g_topology_unlock();
879 return (fdc_biodone(fdc, ENXIO));
880 }
881
882 /* Check if the floppy is write-protected */
883 if (bp->bio_cmd == BIO_FMT || bp->bio_cmd == BIO_WRITE) {
884 retry_line = __LINE__;
885 if(fdc_sense_drive(fdc, &st3) != 0)
886 return (1);
887 if(st3 & NE7_ST3_WP)
888 return (fdc_biodone(fdc, EROFS));
889 }
890
891 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0;
892 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1;
893 i = fd->ft->sectrac * fd->ft->heads;
894 cylinder = bp->bio_pblkno / i;
895 descyl = cylinder * steptrac;
896 sec = bp->bio_pblkno % i;
897 nsect = i - sec;
898 head = sec / fd->ft->sectrac;
899 sec = sec % fd->ft->sectrac + 1;
900
901 /* If everything is going swimmingly, use multisector xfer */
902 if (fdc->retry == 0 &&
903 (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE)) {
904 fd->fd_iosize = imin(nsect * fd->sectorsize, bp->bio_resid);
905 nsect = fd->fd_iosize / fd->sectorsize;
906 } else if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) {
907 fd->fd_iosize = fd->sectorsize;
908 nsect = 1;
909 }
910
911 /* Do RECAL if we need to or are going to track zero anyway */
912 if ((need_recal & (1 << fd->fdsu)) ||
913 (cylinder == 0 && fd->track != 0) ||
914 fdc->retry > 2) {
915 retry_line = __LINE__;
916 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
917 return (1);
918 tsleep(fdc, PRIBIO, "fdrecal", hz);
919 retry_line = __LINE__;
920 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
921 return (1); /* XXX */
922 retry_line = __LINE__;
923 if ((st0 & 0xc0) || cyl != 0)
924 return (1);
925 need_recal &= ~(1 << fd->fdsu);
926 fd->track = 0;
927 /* let the heads settle */
928 if (settle)
929 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
930 }
931
932 /*
933 * SEEK to where we want to be
934 */
935 if (cylinder != fd->track) {
936 retry_line = __LINE__;
937 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, descyl, 0))
938 return (1);
939 tsleep(fdc, PRIBIO, "fdseek", hz);
940 retry_line = __LINE__;
941 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
942 return (1); /* XXX */
943 retry_line = __LINE__;
944 if ((st0 & 0xc0) || cyl != descyl) {
945 need_recal |= (1 << fd->fdsu);
946 return (1);
947 }
948 /* let the heads settle */
949 if (settle)
950 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
951 }
952 fd->track = cylinder;
953
954 if (debugflags & 8)
955 printf("op %x bn %ju siz %u ptr %p retry %d\n",
956 bp->bio_cmd, bp->bio_pblkno, fd->fd_iosize,
957 fd->fd_ioptr, fdc->retry);
958
959 /* Setup ISADMA if we need it and have it */
960 if ((bp->bio_cmd == BIO_READ ||
961 bp->bio_cmd == BIO_WRITE ||
962 bp->bio_cmd == BIO_FMT)
963 && !(fdc->flags & FDC_NODMA)) {
964 isa_dmastart(
965 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
966 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
967 mtx_lock(&fdc->fdc_mtx);
968 fd->flags |= FD_ISADMA;
969 mtx_unlock(&fdc->fdc_mtx);
970 }
971
972 /* Do PIO if we have to */
973 if (fdc->flags & FDC_NODMA) {
974 if (bp->bio_cmd == BIO_READ ||
975 bp->bio_cmd == BIO_WRITE ||
976 bp->bio_cmd == BIO_FMT)
977 fdbcdr_wr(fdc, 1, fd->fd_iosize);
978 if (bp->bio_cmd == BIO_WRITE ||
979 bp->bio_cmd == BIO_FMT)
980 fdc_pio(fdc);
981 }
982
983 switch(bp->bio_cmd) {
984 case BIO_FMT:
985 /* formatting */
986 finfo = (struct fd_formb *)bp->bio_data;
987 retry_line = __LINE__;
988 if (fdc_cmd(fdc, 6,
989 NE7CMD_FORMAT | mfm,
990 head << 2 | fd->fdsu,
991 finfo->fd_formb_secshift,
992 finfo->fd_formb_nsecs,
993 finfo->fd_formb_gaplen,
994 finfo->fd_formb_fillbyte, 0))
995 return (1);
996 break;
997 case BIO_RDID:
998 retry_line = __LINE__;
999 if (fdc_cmd(fdc, 2,
1000 NE7CMD_READID | mfm,
1001 head << 2 | fd->fdsu, 0))
1002 return (1);
1003 break;
1004 case BIO_READ:
1005 retry_line = __LINE__;
1006 if (fdc_cmd(fdc, 9,
1007 NE7CMD_READ | NE7CMD_SK | mfm | NE7CMD_MT,
1008 head << 2 | fd->fdsu, /* head & unit */
1009 fd->track, /* track */
1010 head, /* head */
1011 sec, /* sector + 1 */
1012 fd->ft->secsize, /* sector size */
1013 fd->ft->sectrac, /* sectors/track */
1014 fd->ft->gap, /* gap size */
1015 fd->ft->datalen, /* data length */
1016 0))
1017 return (1);
1018 break;
1019 case BIO_WRITE:
1020 retry_line = __LINE__;
1021 if (fdc_cmd(fdc, 9,
1022 NE7CMD_WRITE | mfm | NE7CMD_MT,
1023 head << 2 | fd->fdsu, /* head & unit */
1024 fd->track, /* track */
1025 head, /* head */
1026 sec, /* sector + 1 */
1027 fd->ft->secsize, /* sector size */
1028 fd->ft->sectrac, /* sectors/track */
1029 fd->ft->gap, /* gap size */
1030 fd->ft->datalen, /* data length */
1031 0))
1032 return (1);
1033 break;
1034 default:
1035 KASSERT(0 == 1, ("Wrong bio_cmd %x\n", bp->bio_cmd));
1036 }
1037
1038 /* Wait for interrupt */
1039 i = tsleep(fdc, PRIBIO, "fddata", hz);
1040
1041 /* PIO if the read looks good */
1042 if (i == 0 && (fdc->flags & FDC_NODMA) && (bp->bio_cmd == BIO_READ))
1043 fdc_pio(fdc);
1044
1045 /* Finish DMA */
1046 if (fd->flags & FD_ISADMA) {
1047 isa_dmadone(
1048 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
1049 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
1050 mtx_lock(&fdc->fdc_mtx);
1051 fd->flags &= ~FD_ISADMA;
1052 mtx_unlock(&fdc->fdc_mtx);
1053 }
1054
1055 if (i != 0) {
1056 /*
1057 * Timeout.
1058 *
1059 * Due to IBM's brain-dead design, the FDC has a faked ready
1060 * signal, hardwired to ready == true. Thus, any command
1061 * issued if there's no diskette in the drive will _never_
1062 * complete, and must be aborted by resetting the FDC.
1063 * Many thanks, Big Blue!
1064 */
1065 retry_line = __LINE__;
1066 fdc->flags |= FDC_NEEDS_RESET;
1067 return (1);
1068 }
1069
1070 retry_line = __LINE__;
1071 if (fdc_read_status(fdc))
1072 return (1);
1073
1074 if (debugflags & 0x10)
1075 printf(" -> %x %x %x %x\n",
1076 fdc->status[0], fdc->status[1],
1077 fdc->status[2], fdc->status[3]);
1078
1079 st0 = fdc->status[0] & NE7_ST0_IC;
1080 if (st0 != 0) {
1081 retry_line = __LINE__;
1082 if (st0 == NE7_ST0_IC_AT && fdc->status[1] & NE7_ST1_OR) {
1083 /*
1084 * DMA overrun. Someone hogged the bus and
1085 * didn't release it in time for the next
1086 * FDC transfer.
1087 */
1088 return (1);
1089 }
1090 retry_line = __LINE__;
1091 if(st0 == NE7_ST0_IC_IV) {
1092 fdc->flags |= FDC_NEEDS_RESET;
1093 return (1);
1094 }
1095 retry_line = __LINE__;
1096 if(st0 == NE7_ST0_IC_AT && fdc->status[2] & NE7_ST2_WC) {
1097 need_recal |= (1 << fd->fdsu);
1098 return (1);
1099 }
1100 if (debugflags & 0x20) {
1101 printf("status %02x %02x %02x %02x %02x %02x\n",
1102 fdc->status[0], fdc->status[1], fdc->status[2],
1103 fdc->status[3], fdc->status[4], fdc->status[5]);
1104 }
1105 retry_line = __LINE__;
1106 if (fd->options & FDOPT_NOERROR)
1107 override_error = 1;
1108 else
1109 return (1);
1110 }
1111 /* All OK */
1112 switch(bp->bio_cmd) {
1113 case BIO_RDID:
1114 /* copy out ID field contents */
1115 idp = (struct fdc_readid *)bp->bio_data;
1116 idp->cyl = fdc->status[3];
1117 idp->head = fdc->status[4];
1118 idp->sec = fdc->status[5];
1119 idp->secshift = fdc->status[6];
1120 if (debugflags & 0x40)
1121 printf("c %d h %d s %d z %d\n",
1122 idp->cyl, idp->head, idp->sec, idp->secshift);
1123 break;
1124 case BIO_READ:
1125 case BIO_WRITE:
1126 bp->bio_pblkno += nsect;
1127 bp->bio_resid -= fd->fd_iosize;
1128 bp->bio_completed += fd->fd_iosize;
1129 fd->fd_ioptr += fd->fd_iosize;
1130 if (override_error) {
1131 if ((debugflags & 4))
1132 printf("FDOPT_NOERROR: returning bad data\n");
1133 } else {
1134 /* Since we managed to get something done,
1135 * reset the retry */
1136 fdc->retry = 0;
1137 if (bp->bio_resid > 0)
1138 return (0);
1139 }
1140 break;
1141 case BIO_FMT:
1142 break;
1143 }
1144 return (fdc_biodone(fdc, 0));
1145 }
1146
1147 static void
fdc_thread(void * arg)1148 fdc_thread(void *arg)
1149 {
1150 struct fdc_data *fdc;
1151
1152 fdc = arg;
1153 int i;
1154
1155 mtx_lock(&fdc->fdc_mtx);
1156 fdc->flags |= FDC_KTHREAD_ALIVE;
1157 while ((fdc->flags & FDC_KTHREAD_EXIT) == 0) {
1158 mtx_unlock(&fdc->fdc_mtx);
1159 i = fdc_worker(fdc);
1160 if (i && debugflags & 0x20) {
1161 if (fdc->bp != NULL)
1162 g_print_bio("", fdc->bp, "");
1163 printf("Retry line %d\n", retry_line);
1164 }
1165 fdc->retry += i;
1166 mtx_lock(&fdc->fdc_mtx);
1167 }
1168 fdc->flags &= ~(FDC_KTHREAD_EXIT | FDC_KTHREAD_ALIVE);
1169 mtx_unlock(&fdc->fdc_mtx);
1170
1171 kproc_exit(0);
1172 }
1173
1174 /*
1175 * Enqueue a request.
1176 */
1177 static void
fd_enqueue(struct fd_data * fd,struct bio * bp)1178 fd_enqueue(struct fd_data *fd, struct bio *bp)
1179 {
1180 struct fdc_data *fdc;
1181
1182 fdc = fd->fdc;
1183 mtx_lock(&fdc->fdc_mtx);
1184 /* If we go from idle, cancel motor turnoff */
1185 if (fd->fd_iocount++ == 0)
1186 callout_stop(&fd->toffhandle);
1187 if (fd->flags & FD_MOTOR) {
1188 /* The motor is on, send it directly to the controller */
1189 bioq_disksort(&fdc->head, bp);
1190 wakeup(&fdc->head);
1191 } else {
1192 /* Queue it on the drive until the motor has started */
1193 bioq_insert_tail(&fd->fd_bq, bp);
1194 if (!(fd->flags & FD_MOTORWAIT))
1195 fd_motor(fd, 1);
1196 }
1197 mtx_unlock(&fdc->fdc_mtx);
1198 }
1199
1200 /*
1201 * Try to find out if we have a disk in the drive.
1202 */
1203 static int
fd_probe_disk(struct fd_data * fd,int * recal)1204 fd_probe_disk(struct fd_data *fd, int *recal)
1205 {
1206 struct fdc_data *fdc;
1207 int st0, st3, cyl;
1208 int oopts, ret;
1209
1210 fdc = fd->fdc;
1211 oopts = fd->options;
1212 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1213 ret = 1;
1214
1215 /*
1216 * First recal, then seek to cyl#1, this clears the old condition on
1217 * the disk change line so we can examine it for current status.
1218 */
1219 if (debugflags & 0x40)
1220 printf("New disk in probe\n");
1221 mtx_lock(&fdc->fdc_mtx);
1222 fd->flags |= FD_NEWDISK;
1223 mtx_unlock(&fdc->fdc_mtx);
1224 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
1225 goto done;
1226 tsleep(fdc, PRIBIO, "fdrecal", hz);
1227 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1228 goto done; /* XXX */
1229 if ((st0 & 0xc0) || cyl != 0)
1230 goto done;
1231
1232 /* Seek to track 1 */
1233 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, 1, 0))
1234 goto done;
1235 tsleep(fdc, PRIBIO, "fdseek", hz);
1236 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1237 goto done; /* XXX */
1238 *recal |= (1 << fd->fdsu);
1239 if (fdin_rd(fdc) & FDI_DCHG) {
1240 if (debugflags & 0x40)
1241 printf("Empty in probe\n");
1242 mtx_lock(&fdc->fdc_mtx);
1243 fd->flags |= FD_EMPTY;
1244 mtx_unlock(&fdc->fdc_mtx);
1245 } else {
1246 if (fdc_sense_drive(fdc, &st3) != 0)
1247 goto done;
1248 if (debugflags & 0x40)
1249 printf("Got disk in probe\n");
1250 mtx_lock(&fdc->fdc_mtx);
1251 fd->flags &= ~FD_EMPTY;
1252 if (st3 & NE7_ST3_WP)
1253 fd->flags |= FD_WP;
1254 else
1255 fd->flags &= ~FD_WP;
1256 mtx_unlock(&fdc->fdc_mtx);
1257 }
1258 ret = 0;
1259
1260 done:
1261 fd->options = oopts;
1262 return (ret);
1263 }
1264
1265 static int
fdmisccmd(struct fd_data * fd,u_int cmd,void * data)1266 fdmisccmd(struct fd_data *fd, u_int cmd, void *data)
1267 {
1268 struct bio *bp;
1269 struct fd_formb *finfo;
1270 struct fdc_readid *idfield;
1271 int error;
1272
1273 bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO);
1274
1275 /*
1276 * Set up a bio request for fdstrategy(). bio_offset is faked
1277 * so that fdstrategy() will seek to the requested
1278 * cylinder, and use the desired head.
1279 */
1280 bp->bio_cmd = cmd;
1281 if (cmd == BIO_FMT) {
1282 finfo = (struct fd_formb *)data;
1283 bp->bio_pblkno =
1284 (finfo->cyl * fd->ft->heads + finfo->head) *
1285 fd->ft->sectrac;
1286 bp->bio_length = sizeof *finfo;
1287 } else if (cmd == BIO_RDID) {
1288 idfield = (struct fdc_readid *)data;
1289 bp->bio_pblkno =
1290 (idfield->cyl * fd->ft->heads + idfield->head) *
1291 fd->ft->sectrac;
1292 bp->bio_length = sizeof(struct fdc_readid);
1293 } else if (cmd == BIO_PROBE) {
1294 /* nothing */
1295 } else
1296 panic("wrong cmd in fdmisccmd()");
1297 bp->bio_offset = bp->bio_pblkno * fd->sectorsize;
1298 bp->bio_data = data;
1299 bp->bio_driver1 = fd;
1300 bp->bio_flags = 0;
1301
1302 fd_enqueue(fd, bp);
1303
1304 do {
1305 tsleep(bp, PRIBIO, "fdwait", hz);
1306 } while (!(bp->bio_flags & BIO_DONE));
1307 error = bp->bio_error;
1308
1309 free(bp, M_TEMP);
1310 return (error);
1311 }
1312
1313 /*
1314 * Try figuring out the density of the media present in our device.
1315 */
1316 static int
fdautoselect(struct fd_data * fd)1317 fdautoselect(struct fd_data *fd)
1318 {
1319 struct fd_type *fdtp;
1320 struct fdc_readid id;
1321 int oopts, rv;
1322
1323 if (!(fd->ft->flags & FL_AUTO))
1324 return (0);
1325
1326 fdtp = fd_native_types[fd->type];
1327 fdsettype(fd, fdtp);
1328 if (!(fd->ft->flags & FL_AUTO))
1329 return (0);
1330
1331 /*
1332 * Try reading sector ID fields, first at cylinder 0, head 0,
1333 * then at cylinder 2, head N. We don't probe cylinder 1,
1334 * since for 5.25in DD media in a HD drive, there are no data
1335 * to read (2 step pulses per media cylinder required). For
1336 * two-sided media, the second probe always goes to head 1, so
1337 * we can tell them apart from single-sided media. As a
1338 * side-effect this means that single-sided media should be
1339 * mentioned in the search list after two-sided media of an
1340 * otherwise identical density. Media with a different number
1341 * of sectors per track but otherwise identical parameters
1342 * cannot be distinguished at all.
1343 *
1344 * If we successfully read an ID field on both cylinders where
1345 * the recorded values match our expectation, we are done.
1346 * Otherwise, we try the next density entry from the table.
1347 *
1348 * Stepping to cylinder 2 has the side-effect of clearing the
1349 * unit attention bit.
1350 */
1351 oopts = fd->options;
1352 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1353 for (; fdtp->heads; fdtp++) {
1354 fdsettype(fd, fdtp);
1355
1356 id.cyl = id.head = 0;
1357 rv = fdmisccmd(fd, BIO_RDID, &id);
1358 if (rv != 0)
1359 continue;
1360 if (id.cyl != 0 || id.head != 0 || id.secshift != fdtp->secsize)
1361 continue;
1362 id.cyl = 2;
1363 id.head = fd->ft->heads - 1;
1364 rv = fdmisccmd(fd, BIO_RDID, &id);
1365 if (id.cyl != 2 || id.head != fdtp->heads - 1 ||
1366 id.secshift != fdtp->secsize)
1367 continue;
1368 if (rv == 0)
1369 break;
1370 }
1371
1372 fd->options = oopts;
1373 if (fdtp->heads == 0) {
1374 if (debugflags & 0x40)
1375 device_printf(fd->dev, "autoselection failed\n");
1376 fdsettype(fd, fd_native_types[fd->type]);
1377 return (-1);
1378 } else {
1379 if (debugflags & 0x40) {
1380 device_printf(fd->dev,
1381 "autoselected %d KB medium\n",
1382 fd->ft->size / 2);
1383 fdprinttype(fd->ft);
1384 }
1385 return (0);
1386 }
1387 }
1388
1389 /*
1390 * GEOM class implementation
1391 */
1392
1393 static g_access_t fd_access;
1394 static g_start_t fd_start;
1395 static g_ioctl_t fd_ioctl;
1396 static g_provgone_t fd_providergone;
1397
1398 struct g_class g_fd_class = {
1399 .name = "FD",
1400 .version = G_VERSION,
1401 .start = fd_start,
1402 .access = fd_access,
1403 .ioctl = fd_ioctl,
1404 .providergone = fd_providergone,
1405 };
1406
1407 static int
fd_access(struct g_provider * pp,int r,int w,int e)1408 fd_access(struct g_provider *pp, int r, int w, int e)
1409 {
1410 struct fd_data *fd;
1411 struct fdc_data *fdc;
1412 int ar, aw, ae;
1413
1414 fd = pp->geom->softc;
1415 fdc = fd->fdc;
1416
1417 /*
1418 * If our provider is withering, we can only get negative requests
1419 * and we don't want to even see them
1420 */
1421 if (pp->flags & G_PF_WITHER)
1422 return (0);
1423
1424 ar = r + pp->acr;
1425 aw = w + pp->acw;
1426 ae = e + pp->ace;
1427
1428 if (ar == 0 && aw == 0 && ae == 0) {
1429 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR);
1430 return (0);
1431 }
1432
1433 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) {
1434 if (fdmisccmd(fd, BIO_PROBE, NULL))
1435 return (ENXIO);
1436 if (fd->flags & FD_EMPTY)
1437 return (ENXIO);
1438 if (fd->flags & FD_NEWDISK) {
1439 if (fdautoselect(fd) != 0 &&
1440 (device_get_flags(fd->dev) & FD_NO_CHLINE)) {
1441 mtx_lock(&fdc->fdc_mtx);
1442 fd->flags |= FD_EMPTY;
1443 mtx_unlock(&fdc->fdc_mtx);
1444 return (ENXIO);
1445 }
1446 mtx_lock(&fdc->fdc_mtx);
1447 fd->flags &= ~FD_NEWDISK;
1448 mtx_unlock(&fdc->fdc_mtx);
1449 }
1450 }
1451
1452 if (w > 0 && (fd->flags & FD_WP)) {
1453 return (EROFS);
1454 }
1455
1456 pp->sectorsize = fd->sectorsize;
1457 pp->stripesize = fd->ft->heads * fd->ft->sectrac * fd->sectorsize;
1458 pp->mediasize = pp->stripesize * fd->ft->tracks;
1459 return (0);
1460 }
1461
1462 static void
fd_start(struct bio * bp)1463 fd_start(struct bio *bp)
1464 {
1465 struct fd_data * fd;
1466
1467 fd = bp->bio_to->geom->softc;
1468 bp->bio_driver1 = fd;
1469 if (bp->bio_cmd == BIO_GETATTR) {
1470 if (g_handleattr_int(bp, "GEOM::fwsectors", fd->ft->sectrac))
1471 return;
1472 if (g_handleattr_int(bp, "GEOM::fwheads", fd->ft->heads))
1473 return;
1474 g_io_deliver(bp, ENOIOCTL);
1475 return;
1476 }
1477 if (!(bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE)) {
1478 g_io_deliver(bp, EOPNOTSUPP);
1479 return;
1480 }
1481 bp->bio_pblkno = bp->bio_offset / fd->sectorsize;
1482 bp->bio_resid = bp->bio_length;
1483 fd_enqueue(fd, bp);
1484 return;
1485 }
1486
1487 static int
fd_ioctl(struct g_provider * pp,u_long cmd,void * data,int fflag,struct thread * td)1488 fd_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td)
1489 {
1490 struct fd_data *fd;
1491 struct fdc_status *fsp;
1492 struct fdc_readid *rid;
1493 int error;
1494
1495 fd = pp->geom->softc;
1496
1497 switch (cmd) {
1498 case FD_GTYPE: /* get drive type */
1499 *(struct fd_type *)data = *fd->ft;
1500 return (0);
1501
1502 case FD_STYPE: /* set drive type */
1503 /*
1504 * Allow setting drive type temporarily iff
1505 * currently unset. Used for fdformat so any
1506 * user can set it, and then start formatting.
1507 */
1508 fd->fts = *(struct fd_type *)data;
1509 if (fd->fts.sectrac) {
1510 /* XXX: check for rubbish */
1511 fdsettype(fd, &fd->fts);
1512 } else {
1513 fdsettype(fd, fd_native_types[fd->type]);
1514 }
1515 if (debugflags & 0x40)
1516 fdprinttype(fd->ft);
1517 return (0);
1518
1519 case FD_GOPTS: /* get drive options */
1520 *(int *)data = fd->options;
1521 return (0);
1522
1523 case FD_SOPTS: /* set drive options */
1524 fd->options = *(int *)data;
1525 return (0);
1526
1527 case FD_CLRERR:
1528 error = priv_check(td, PRIV_DRIVER);
1529 if (error)
1530 return (error);
1531 fd->fdc->fdc_errs = 0;
1532 return (0);
1533
1534 case FD_GSTAT:
1535 fsp = (struct fdc_status *)data;
1536 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
1537 return (EINVAL);
1538 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
1539 return (0);
1540
1541 case FD_GDTYPE:
1542 *(enum fd_drivetype *)data = fd->type;
1543 return (0);
1544
1545 case FD_FORM:
1546 if (!(fflag & FWRITE))
1547 return (EPERM);
1548 if (((struct fd_formb *)data)->format_version !=
1549 FD_FORMAT_VERSION)
1550 return (EINVAL); /* wrong version of formatting prog */
1551 error = fdmisccmd(fd, BIO_FMT, data);
1552 mtx_lock(&fd->fdc->fdc_mtx);
1553 fd->flags |= FD_NEWDISK;
1554 mtx_unlock(&fd->fdc->fdc_mtx);
1555 break;
1556
1557 case FD_READID:
1558 rid = (struct fdc_readid *)data;
1559 if (rid->cyl > 85 || rid->head > 1)
1560 return (EINVAL);
1561 error = fdmisccmd(fd, BIO_RDID, data);
1562 break;
1563
1564 case FIONBIO:
1565 case FIOASYNC:
1566 /* For backwards compat with old fd*(8) tools */
1567 error = 0;
1568 break;
1569
1570 default:
1571 if (debugflags & 0x80)
1572 printf("Unknown ioctl %lx\n", cmd);
1573 error = ENOIOCTL;
1574 break;
1575 }
1576 return (error);
1577 };
1578
1579 /*
1580 * Configuration/initialization stuff, per controller.
1581 */
1582 struct fdc_ivars {
1583 int fdunit;
1584 int fdtype;
1585 };
1586
1587 void
fdc_release_resources(struct fdc_data * fdc)1588 fdc_release_resources(struct fdc_data *fdc)
1589 {
1590 device_t dev;
1591 struct resource *last;
1592 int i;
1593
1594 dev = fdc->fdc_dev;
1595 if (fdc->fdc_intr)
1596 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1597 fdc->fdc_intr = NULL;
1598 if (fdc->res_irq != NULL)
1599 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
1600 fdc->res_irq);
1601 fdc->res_irq = NULL;
1602 last = NULL;
1603 for (i = 0; i < FDC_MAXREG; i++) {
1604 if (fdc->resio[i] != NULL && fdc->resio[i] != last) {
1605 bus_release_resource(dev, SYS_RES_IOPORT,
1606 fdc->ridio[i], fdc->resio[i]);
1607 last = fdc->resio[i];
1608 fdc->resio[i] = NULL;
1609 }
1610 }
1611 if (fdc->res_drq != NULL)
1612 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
1613 fdc->res_drq);
1614 fdc->res_drq = NULL;
1615 }
1616
1617 int
fdc_read_ivar(device_t dev,device_t child,int which,uintptr_t * result)1618 fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
1619 {
1620 struct fdc_ivars *ivars = device_get_ivars(child);
1621
1622 switch (which) {
1623 case FDC_IVAR_FDUNIT:
1624 *result = ivars->fdunit;
1625 break;
1626 case FDC_IVAR_FDTYPE:
1627 *result = ivars->fdtype;
1628 break;
1629 default:
1630 return (ENOENT);
1631 }
1632 return (0);
1633 }
1634
1635 int
fdc_write_ivar(device_t dev,device_t child,int which,uintptr_t value)1636 fdc_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
1637 {
1638 struct fdc_ivars *ivars = device_get_ivars(child);
1639
1640 switch (which) {
1641 case FDC_IVAR_FDUNIT:
1642 ivars->fdunit = value;
1643 break;
1644 case FDC_IVAR_FDTYPE:
1645 ivars->fdtype = value;
1646 break;
1647 default:
1648 return (ENOENT);
1649 }
1650 return (0);
1651 }
1652
1653 int
fdc_initial_reset(device_t dev,struct fdc_data * fdc)1654 fdc_initial_reset(device_t dev, struct fdc_data *fdc)
1655 {
1656 int ic_type, part_id;
1657
1658 /*
1659 * A status value of 0xff is very unlikely, but not theoretically
1660 * impossible, but it is far more likely to indicate an empty bus.
1661 */
1662 if (fdsts_rd(fdc) == 0xff)
1663 return (ENXIO);
1664
1665 /*
1666 * Assert a reset to the floppy controller and check that the status
1667 * register goes to zero.
1668 */
1669 fdout_wr(fdc, 0);
1670 fdout_wr(fdc, 0);
1671 if (fdsts_rd(fdc) != 0)
1672 return (ENXIO);
1673
1674 /*
1675 * Clear the reset and see it come ready.
1676 */
1677 fdout_wr(fdc, FDO_FRST);
1678 DELAY(100);
1679 if (fdsts_rd(fdc) != 0x80)
1680 return (ENXIO);
1681
1682 /* Then, see if it can handle a command. */
1683 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(6, 240),
1684 NE7_SPEC_2(31, 0), 0))
1685 return (ENXIO);
1686
1687 /*
1688 * Try to identify the chip.
1689 *
1690 * The i8272 datasheet documents that unknown commands
1691 * will return ST0 as 0x80. The i8272 is supposedly identical
1692 * to the NEC765.
1693 * The i82077SL datasheet says 0x90 for the VERSION command,
1694 * and several "superio" chips emulate this.
1695 */
1696 if (fdc_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type))
1697 return (ENXIO);
1698 if (fdc_cmd(fdc, 1, 0x18, 1, &part_id))
1699 return (ENXIO);
1700 if (bootverbose)
1701 device_printf(dev,
1702 "ic_type %02x part_id %02x\n", ic_type, part_id);
1703 switch (ic_type & 0xff) {
1704 case 0x80:
1705 device_set_desc(dev, "NEC 765 or clone");
1706 fdc->fdct = FDC_NE765;
1707 break;
1708 case 0x81:
1709 case 0x90:
1710 device_set_desc(dev,
1711 "Enhanced floppy controller");
1712 fdc->fdct = FDC_ENHANCED;
1713 break;
1714 default:
1715 device_set_desc(dev, "Generic floppy controller");
1716 fdc->fdct = FDC_UNKNOWN;
1717 break;
1718 }
1719 return (0);
1720 }
1721
1722 int
fdc_detach(device_t dev)1723 fdc_detach(device_t dev)
1724 {
1725 struct fdc_data *fdc;
1726 int error;
1727
1728 fdc = device_get_softc(dev);
1729
1730 /* have our children detached first */
1731 if ((error = bus_generic_detach(dev)))
1732 return (error);
1733
1734 if (fdc->fdc_intr)
1735 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1736 fdc->fdc_intr = NULL;
1737
1738 /* kill worker thread */
1739 mtx_lock(&fdc->fdc_mtx);
1740 fdc->flags |= FDC_KTHREAD_EXIT;
1741 wakeup(&fdc->head);
1742 while ((fdc->flags & FDC_KTHREAD_ALIVE) != 0)
1743 msleep(fdc->fdc_thread, &fdc->fdc_mtx, PRIBIO, "fdcdet", 0);
1744 mtx_unlock(&fdc->fdc_mtx);
1745
1746 /* reset controller, turn motor off */
1747 fdout_wr(fdc, 0);
1748
1749 if (!(fdc->flags & FDC_NODMA))
1750 isa_dma_release(fdc->dmachan);
1751 fdc_release_resources(fdc);
1752 mtx_destroy(&fdc->fdc_mtx);
1753 return (0);
1754 }
1755
1756 /*
1757 * Add a child device to the fdc controller. It will then be probed etc.
1758 */
1759 device_t
fdc_add_child(device_t dev,const char * name,int unit)1760 fdc_add_child(device_t dev, const char *name, int unit)
1761 {
1762 struct fdc_ivars *ivar;
1763 device_t child;
1764
1765 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO);
1766 if (ivar == NULL)
1767 return (NULL);
1768 child = device_add_child(dev, name, unit);
1769 if (child == NULL) {
1770 free(ivar, M_DEVBUF);
1771 return (NULL);
1772 }
1773 device_set_ivars(child, ivar);
1774 ivar->fdunit = unit;
1775 ivar->fdtype = FDT_NONE;
1776 if (resource_disabled(name, unit))
1777 device_disable(child);
1778 return (child);
1779 }
1780
1781 int
fdc_attach(device_t dev)1782 fdc_attach(device_t dev)
1783 {
1784 struct fdc_data *fdc;
1785 int error;
1786
1787 fdc = device_get_softc(dev);
1788 fdc->fdc_dev = dev;
1789 error = fdc_initial_reset(dev, fdc);
1790 if (error) {
1791 device_printf(dev, "does not respond\n");
1792 return (error);
1793 }
1794 error = bus_setup_intr(dev, fdc->res_irq,
1795 INTR_TYPE_BIO | INTR_ENTROPY |
1796 ((fdc->flags & FDC_NOFAST) ? INTR_MPSAFE : 0),
1797 ((fdc->flags & FDC_NOFAST) ? NULL : fdc_intr_fast),
1798 ((fdc->flags & FDC_NOFAST) ? fdc_intr : NULL),
1799 fdc, &fdc->fdc_intr);
1800 if (error) {
1801 device_printf(dev, "cannot setup interrupt\n");
1802 return (error);
1803 }
1804 if (!(fdc->flags & FDC_NODMA)) {
1805 error = isa_dma_acquire(fdc->dmachan);
1806 if (!error) {
1807 error = isa_dma_init(fdc->dmachan,
1808 MAX_BYTES_PER_CYL, M_WAITOK);
1809 if (error)
1810 isa_dma_release(fdc->dmachan);
1811 }
1812 if (error)
1813 return (error);
1814 }
1815 fdc->fdcu = device_get_unit(dev);
1816 fdc->flags |= FDC_NEEDS_RESET;
1817
1818 mtx_init(&fdc->fdc_mtx, "fdc lock", NULL, MTX_DEF);
1819
1820 /* reset controller, turn motor off, clear fdout mirror reg */
1821 fdout_wr(fdc, fdc->fdout = 0);
1822 bioq_init(&fdc->head);
1823
1824 settle = hz / 8;
1825
1826 return (0);
1827 }
1828
1829 void
fdc_start_worker(device_t dev)1830 fdc_start_worker(device_t dev)
1831 {
1832 struct fdc_data *fdc;
1833
1834 fdc = device_get_softc(dev);
1835 kproc_create(fdc_thread, fdc, &fdc->fdc_thread, 0, 0,
1836 "fdc%d", device_get_unit(dev));
1837 }
1838
1839 int
fdc_hints_probe(device_t dev)1840 fdc_hints_probe(device_t dev)
1841 {
1842 const char *name, *dname;
1843 int i, error, dunit;
1844
1845 /*
1846 * Probe and attach any children. We should probably detect
1847 * devices from the BIOS unless overridden.
1848 */
1849 name = device_get_nameunit(dev);
1850 i = 0;
1851 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) {
1852 resource_int_value(dname, dunit, "drive", &dunit);
1853 fdc_add_child(dev, dname, dunit);
1854 }
1855
1856 if ((error = bus_generic_attach(dev)) != 0)
1857 return (error);
1858 return (0);
1859 }
1860
1861 int
fdc_print_child(device_t me,device_t child)1862 fdc_print_child(device_t me, device_t child)
1863 {
1864 int retval = 0, flags;
1865
1866 retval += bus_print_child_header(me, child);
1867 retval += printf(" on %s drive %d", device_get_nameunit(me),
1868 fdc_get_fdunit(child));
1869 if ((flags = device_get_flags(me)) != 0)
1870 retval += printf(" flags %#x", flags);
1871 retval += printf("\n");
1872
1873 return (retval);
1874 }
1875
1876 /*
1877 * Configuration/initialization, per drive.
1878 */
1879 static int
fd_probe(device_t dev)1880 fd_probe(device_t dev)
1881 {
1882 #if defined(__i386__) || defined(__amd64__)
1883 int unit;
1884 #endif
1885 int i;
1886 u_int st0, st3;
1887 struct fd_data *fd;
1888 struct fdc_data *fdc;
1889 int fdsu;
1890 int flags, type;
1891
1892 fdsu = fdc_get_fdunit(dev);
1893 fd = device_get_softc(dev);
1894 fdc = device_get_softc(device_get_parent(dev));
1895 flags = device_get_flags(dev);
1896
1897 fd->dev = dev;
1898 fd->fdc = fdc;
1899 fd->fdsu = fdsu;
1900
1901 /* Auto-probe if fdinfo is present, but always allow override. */
1902 type = flags & FD_TYPEMASK;
1903 if (type == FDT_NONE && (type = fdc_get_fdtype(dev)) != FDT_NONE) {
1904 fd->type = type;
1905 goto done;
1906 } else {
1907 /* make sure fdautoselect() will be called */
1908 fd->flags = FD_EMPTY;
1909 fd->type = type;
1910 }
1911
1912 #if defined(__i386__) || defined(__amd64__)
1913 unit = device_get_unit(dev);
1914 if (fd->type == FDT_NONE && (unit == 0 || unit == 1)) {
1915 /* Look up what the BIOS thinks we have. */
1916 if (unit == 0)
1917 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4;
1918 else
1919 fd->type = rtcin(RTC_FDISKETTE) & 0x0f;
1920 if (fd->type == FDT_288M_1)
1921 fd->type = FDT_288M;
1922 }
1923 #endif /* __i386__ || __amd64__ */
1924 /* is there a unit? */
1925 if (fd->type == FDT_NONE)
1926 return (ENXIO);
1927
1928 mtx_lock(&fdc->fdc_mtx);
1929
1930 /* select it */
1931 fd_select(fd);
1932 fd_motor(fd, 1);
1933 fdc->fd = fd;
1934 fdc_reset(fdc); /* XXX reset, then unreset, etc. */
1935 DELAY(1000000); /* 1 sec */
1936
1937 if ((flags & FD_NO_PROBE) == 0) {
1938 /* If we're at track 0 first seek inwards. */
1939 if ((fdc_sense_drive(fdc, &st3) == 0) &&
1940 (st3 & NE7_ST3_T0)) {
1941 /* Seek some steps... */
1942 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
1943 /* ...wait a moment... */
1944 DELAY(300000);
1945 /* make ctrlr happy: */
1946 fdc_sense_int(fdc, NULL, NULL);
1947 }
1948 }
1949
1950 for (i = 0; i < 2; i++) {
1951 /*
1952 * we must recalibrate twice, just in case the
1953 * heads have been beyond cylinder 76, since
1954 * most FDCs still barf when attempting to
1955 * recalibrate more than 77 steps
1956 */
1957 /* go back to 0: */
1958 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
1959 /* a second being enough for full stroke seek*/
1960 DELAY(i == 0 ? 1000000 : 300000);
1961
1962 /* anything responding? */
1963 if (fdc_sense_int(fdc, &st0, NULL) == 0 &&
1964 (st0 & NE7_ST0_EC) == 0)
1965 break; /* already probed successfully */
1966 }
1967 }
1968 }
1969
1970 fd_motor(fd, 0);
1971 fdc->fd = NULL;
1972 mtx_unlock(&fdc->fdc_mtx);
1973
1974 if ((flags & FD_NO_PROBE) == 0 &&
1975 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */
1976 return (ENXIO);
1977
1978 done:
1979
1980 switch (fd->type) {
1981 case FDT_12M:
1982 device_set_desc(dev, "1200-KB 5.25\" drive");
1983 break;
1984 case FDT_144M:
1985 device_set_desc(dev, "1440-KB 3.5\" drive");
1986 break;
1987 case FDT_288M:
1988 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
1989 break;
1990 case FDT_360K:
1991 device_set_desc(dev, "360-KB 5.25\" drive");
1992 break;
1993 case FDT_720K:
1994 device_set_desc(dev, "720-KB 3.5\" drive");
1995 break;
1996 default:
1997 return (ENXIO);
1998 }
1999 fd->track = FD_NO_TRACK;
2000 fd->fdc = fdc;
2001 fd->fdsu = fdsu;
2002 fd->options = 0;
2003 callout_init_mtx(&fd->toffhandle, &fd->fdc->fdc_mtx, 0);
2004
2005 /* initialize densities for subdevices */
2006 fdsettype(fd, fd_native_types[fd->type]);
2007 return (0);
2008 }
2009
2010 /*
2011 * We have to do this in a geom event because GEOM is not running
2012 * when fd_attach() is.
2013 * XXX: move fd_attach after geom like ata/scsi disks
2014 */
2015 static void
fd_attach2(void * arg,int flag)2016 fd_attach2(void *arg, int flag)
2017 {
2018 struct fd_data *fd;
2019
2020 fd = arg;
2021
2022 fd->fd_geom = g_new_geomf(&g_fd_class,
2023 "fd%d", device_get_unit(fd->dev));
2024 fd->fd_provider = g_new_providerf(fd->fd_geom, "%s", fd->fd_geom->name);
2025 fd->fd_geom->softc = fd;
2026 g_error_provider(fd->fd_provider, 0);
2027 }
2028
2029 static int
fd_attach(device_t dev)2030 fd_attach(device_t dev)
2031 {
2032 struct fd_data *fd;
2033
2034 fd = device_get_softc(dev);
2035 g_post_event(fd_attach2, fd, M_WAITOK, NULL);
2036 fd->flags |= FD_EMPTY;
2037 bioq_init(&fd->fd_bq);
2038
2039 return (0);
2040 }
2041
2042 static void
fd_providergone(struct g_provider * pp)2043 fd_providergone(struct g_provider *pp)
2044 {
2045 struct fd_data *fd;
2046
2047 fd = pp->geom->softc;
2048 fd->gone = true;
2049 wakeup(fd);
2050 }
2051
2052 static void
fd_detach_geom(void * arg,int flag)2053 fd_detach_geom(void *arg, int flag)
2054 {
2055 struct fd_data *fd = arg;
2056
2057 g_topology_assert();
2058 g_wither_geom(fd->fd_geom, ENXIO);
2059 }
2060
2061 static int
fd_detach(device_t dev)2062 fd_detach(device_t dev)
2063 {
2064 struct fd_data *fd;
2065
2066 fd = device_get_softc(dev);
2067
2068 g_waitfor_event(fd_detach_geom, fd, M_WAITOK, NULL);
2069 while (!fd->gone) {
2070 tsleep(fd, PZERO, "fdgone", hz/10);
2071 }
2072
2073 /*
2074 * There may be accesses to the floppy while we're waitng, so drain the
2075 * motor callback here. fdc_detach turns off motor if it's still on when
2076 * we get to this point.
2077 */
2078 callout_drain(&fd->toffhandle);
2079
2080 return (0);
2081 }
2082
2083 static device_method_t fd_methods[] = {
2084 /* Device interface */
2085 DEVMETHOD(device_probe, fd_probe),
2086 DEVMETHOD(device_attach, fd_attach),
2087 DEVMETHOD(device_detach, fd_detach),
2088 DEVMETHOD(device_shutdown, bus_generic_shutdown),
2089 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
2090 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
2091 { 0, 0 }
2092 };
2093
2094 static driver_t fd_driver = {
2095 "fd",
2096 fd_methods,
2097 sizeof(struct fd_data)
2098 };
2099
2100 static int
fdc_modevent(module_t mod,int type,void * data)2101 fdc_modevent(module_t mod, int type, void *data)
2102 {
2103
2104 return (g_modevent(NULL, type, &g_fd_class));
2105 }
2106
2107 DRIVER_MODULE(fd, fdc, fd_driver, fdc_modevent, 0);
2108