FreeBSD/Linux Kernel Cross Reference
sys/dev/fdc/fdc.c
1 /*-
2 * Copyright (c) 2004 Poul-Henning Kamp
3 * Copyright (c) 1990 The Regents of the University of California.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Don Ahn.
8 *
9 * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu)
10 * aided by the Linux floppy driver modifications from David Bateman
11 * (dbateman@eng.uts.edu.au).
12 *
13 * Copyright (c) 1993, 1994 by
14 * jc@irbs.UUCP (John Capo)
15 * vak@zebub.msk.su (Serge Vakulenko)
16 * ache@astral.msk.su (Andrew A. Chernov)
17 *
18 * Copyright (c) 1993, 1994, 1995 by
19 * joerg_wunsch@uriah.sax.de (Joerg Wunsch)
20 * dufault@hda.com (Peter Dufault)
21 *
22 * Copyright (c) 2001 Joerg Wunsch,
23 * joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
24 *
25 * Redistribution and use in source and binary forms, with or without
26 * modification, are permitted provided that the following conditions
27 * are met:
28 * 1. Redistributions of source code must retain the above copyright
29 * notice, this list of conditions and the following disclaimer.
30 * 2. Redistributions in binary form must reproduce the above copyright
31 * notice, this list of conditions and the following disclaimer in the
32 * documentation and/or other materials provided with the distribution.
33 * 4. Neither the name of the University nor the names of its contributors
34 * may be used to endorse or promote products derived from this software
35 * without specific prior written permission.
36 *
37 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
38 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
40 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
41 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
42 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
43 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
45 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
46 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47 * SUCH DAMAGE.
48 *
49 * from: @(#)fd.c 7.4 (Berkeley) 5/25/91
50 *
51 */
52
53 #include <sys/cdefs.h>
54 __FBSDID("$FreeBSD: releng/11.1/sys/dev/fdc/fdc.c 298955 2016-05-03 03:41:25Z pfg $");
55
56 #include "opt_fdc.h"
57
58 #include <sys/param.h>
59 #include <sys/bio.h>
60 #include <sys/bus.h>
61 #include <sys/devicestat.h>
62 #include <sys/disk.h>
63 #include <sys/fcntl.h>
64 #include <sys/fdcio.h>
65 #include <sys/filio.h>
66 #include <sys/kernel.h>
67 #include <sys/kthread.h>
68 #include <sys/lock.h>
69 #include <sys/malloc.h>
70 #include <sys/module.h>
71 #include <sys/mutex.h>
72 #include <sys/priv.h>
73 #include <sys/proc.h>
74 #include <sys/rman.h>
75 #include <sys/sysctl.h>
76 #include <sys/systm.h>
77
78 #include <geom/geom.h>
79
80 #include <machine/bus.h>
81 #include <machine/clock.h>
82 #include <machine/stdarg.h>
83
84 #include <isa/isavar.h>
85 #ifdef PC98
86 #include <pc98/pc98/pc98_machdep.h>
87 #else
88 #include <isa/isareg.h>
89 #include <isa/rtc.h>
90 #endif
91 #include <dev/fdc/fdcvar.h>
92
93 #include <dev/ic/nec765.h>
94
95 /*
96 * Runtime configuration hints/flags
97 */
98
99 /* configuration flags for fd */
100 #define FD_TYPEMASK 0x0f /* drive type, matches enum
101 * fd_drivetype; on i386 machines, if
102 * given as 0, use RTC type for fd0
103 * and fd1 */
104 #define FD_NO_CHLINE 0x10 /* drive does not support changeline
105 * aka. unit attention */
106 #define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just
107 * assume it is there */
108
109 /*
110 * Things that could conceiveably considered parameters or tweakables
111 */
112
113 /*
114 * Maximal number of bytes in a cylinder.
115 * This is used for ISADMA bouncebuffer allocation and sets the max
116 * xfersize we support.
117 *
118 * 2.88M format has 2 x 36 x 512, allow for hacked up density.
119 */
120 #define MAX_BYTES_PER_CYL (2 * 40 * 512)
121
122 /*
123 * Timeout value for the PIO loops to wait until the FDC main status
124 * register matches our expectations (request for master, direction
125 * bit). This is supposed to be a number of microseconds, although
126 * timing might actually not be very accurate.
127 *
128 * Timeouts of 100 msec are believed to be required for some broken
129 * (old) hardware.
130 */
131 #define FDSTS_TIMEOUT 100000
132
133 /*
134 * After this many errors, stop whining. Close will reset this count.
135 */
136 #define FDC_ERRMAX 100
137
138 /*
139 * AutoDensity search lists for each drive type.
140 */
141
142 static struct fd_type fd_searchlist_360k[] = {
143 #ifndef PC98
144 { FDF_5_360 },
145 #endif
146 { 0 }
147 };
148
149 static struct fd_type fd_searchlist_12m[] = {
150 #ifdef PC98
151 { FDF_5_1200 | FL_AUTO },
152 { FDF_5_720 | FL_AUTO },
153 { FDF_5_360 | FL_AUTO },
154 { FDF_5_640 | FL_AUTO },
155 { FDF_5_1230 | FL_AUTO },
156 #else
157 { FDF_5_1200 | FL_AUTO },
158 { FDF_5_400 | FL_AUTO },
159 { FDF_5_360 | FL_2STEP | FL_AUTO},
160 #endif
161 { 0 }
162 };
163
164 static struct fd_type fd_searchlist_720k[] = {
165 #ifndef PC98
166 { FDF_3_720 },
167 #endif
168 { 0 }
169 };
170
171 static struct fd_type fd_searchlist_144m[] = {
172 #ifdef PC98
173 { FDF_3_1440 | FL_AUTO},
174 { FDF_3_1200 | FL_AUTO},
175 { FDF_3_720 | FL_AUTO},
176 { FDF_3_360 | FL_AUTO},
177 { FDF_3_640 | FL_AUTO},
178 { FDF_3_1230 | FL_AUTO},
179 #else
180 { FDF_3_1440 | FL_AUTO},
181 { FDF_3_720 | FL_AUTO},
182 #endif
183 { 0 }
184 };
185
186 static struct fd_type fd_searchlist_288m[] = {
187 #ifndef PC98
188 { FDF_3_1440 | FL_AUTO },
189 #if 0
190 { FDF_3_2880 | FL_AUTO }, /* XXX: probably doesn't work */
191 #endif
192 { FDF_3_720 | FL_AUTO},
193 #endif
194 { 0 }
195 };
196
197 /*
198 * Order must match enum fd_drivetype in <sys/fdcio.h>.
199 */
200 static struct fd_type *fd_native_types[] = {
201 NULL, /* FDT_NONE */
202 fd_searchlist_360k, /* FDT_360K */
203 fd_searchlist_12m, /* FDT_12M */
204 fd_searchlist_720k, /* FDT_720K */
205 fd_searchlist_144m, /* FDT_144M */
206 fd_searchlist_288m, /* FDT_288M_1 (mapped to FDT_288M) */
207 fd_searchlist_288m, /* FDT_288M */
208 };
209
210 /*
211 * Internals start here
212 */
213
214 #ifdef PC98
215 /* registers */
216 #define FDSTS 0 /* NEC 765 Main Status Register (R) */
217 #define FDDATA 1 /* NEC 765 Data Register (R/W) */
218 #define FDCTL 2 /* FD Control Register */
219 #define FDC_RST 0x80 /* FDC RESET */
220 #define FDC_RDY 0x40 /* force READY */
221 #define FDC_DD 0x20 /* FDD Mode Exchange 0:1M 1:640K */
222 #define FDC_DMAE 0x10 /* enable floppy DMA */
223 #define FDC_MTON 0x08 /* MOTOR ON (when EMTON=1)*/
224 #define FDC_TMSK 0x04 /* TIMER MASK */
225 #define FDC_TTRG 0x01 /* TIMER TRIGER */
226
227 #define FDP 3
228 #define FDP_EMTON 0x04 /* enable MTON */
229 #define FDP_FDDEXC 0x02 /* FDD Mode Exchange 1:1M 0:640K */
230 #define FDP_PORTEXC 0x01 /* PORT Exchane 1:1M 0:640K */
231
232 #define FDEM 4
233 #else
234 /* registers */
235 #define FDOUT 2 /* Digital Output Register (W) */
236 #define FDO_FDSEL 0x03 /* floppy device select */
237 #define FDO_FRST 0x04 /* floppy controller reset */
238 #define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */
239 #define FDO_MOEN0 0x10 /* motor enable drive 0 */
240 #define FDO_MOEN1 0x20 /* motor enable drive 1 */
241 #define FDO_MOEN2 0x40 /* motor enable drive 2 */
242 #define FDO_MOEN3 0x80 /* motor enable drive 3 */
243
244 #define FDSTS 4 /* NEC 765 Main Status Register (R) */
245 #define FDDSR 4 /* Data Rate Select Register (W) */
246 #define FDDATA 5 /* NEC 765 Data Register (R/W) */
247 #define FDCTL 7 /* Control Register (W) */
248 #endif /* PC98 */
249
250 /*
251 * The YE-DATA PC Card floppies use PIO to read in the data rather
252 * than DMA due to the wild variability of DMA for the PC Card
253 * devices. DMA was deleted from the PC Card specification in version
254 * 7.2 of the standard, but that post-dates the YE-DATA devices by many
255 * years.
256 *
257 * In addition, if we cannot setup the DMA resources for the ISA
258 * attachment, we'll use this same offset for data transfer. However,
259 * that almost certainly won't work.
260 *
261 * For this mode, offset 0 and 1 must be used to setup the transfer
262 * for this floppy. This is OK for PC Card YE Data devices, but for
263 * ISA this is likely wrong. These registers are only available on
264 * those systems that map them to the floppy drive. Newer systems do
265 * not do this, and we should likely prohibit access to them (or
266 * disallow NODMA to be set).
267 */
268 #define FDBCDR 0 /* And 1 */
269 #define FD_YE_DATAPORT 6 /* Drive Data port */
270
271 #ifndef PC98
272 #define FDI_DCHG 0x80 /* diskette has been changed */
273 /* requires drive and motor being selected */
274 /* is cleared by any step pulse to drive */
275 #endif
276
277 /*
278 * We have three private BIO commands.
279 */
280 #define BIO_PROBE BIO_CMD0
281 #define BIO_RDID BIO_CMD1
282 #define BIO_FMT BIO_CMD2
283
284 /*
285 * Per drive structure (softc).
286 */
287 struct fd_data {
288 u_char *fd_ioptr; /* IO pointer */
289 u_int fd_iosize; /* Size of IO chunks */
290 u_int fd_iocount; /* Outstanding requests */
291 struct fdc_data *fdc; /* pointer to controller structure */
292 int fdsu; /* this units number on this controller */
293 enum fd_drivetype type; /* drive type */
294 struct fd_type *ft; /* pointer to current type descriptor */
295 struct fd_type fts; /* type descriptors */
296 int sectorsize;
297 int flags;
298 #define FD_WP (1<<0) /* Write protected */
299 #define FD_MOTOR (1<<1) /* motor should be on */
300 #define FD_MOTORWAIT (1<<2) /* motor should be on */
301 #define FD_EMPTY (1<<3) /* no media */
302 #define FD_NEWDISK (1<<4) /* media changed */
303 #define FD_ISADMA (1<<5) /* isa dma started */
304 int track; /* where we think the head is */
305 #define FD_NO_TRACK -2
306 int options; /* FDOPT_* */
307 struct callout toffhandle;
308 struct g_geom *fd_geom;
309 struct g_provider *fd_provider;
310 device_t dev;
311 struct bio_queue_head fd_bq;
312 #ifdef PC98
313 int pc98_trans;
314 #endif
315 };
316
317 #define FD_NOT_VALID -2
318
319 static driver_intr_t fdc_intr;
320 static driver_filter_t fdc_intr_fast;
321 static void fdc_reset(struct fdc_data *);
322 static int fd_probe_disk(struct fd_data *, int *);
323
324 static SYSCTL_NODE(_debug, OID_AUTO, fdc, CTLFLAG_RW, 0, "fdc driver");
325
326 static int fifo_threshold = 8;
327 SYSCTL_INT(_debug_fdc, OID_AUTO, fifo, CTLFLAG_RW, &fifo_threshold, 0,
328 "FIFO threshold setting");
329
330 static int debugflags = 0;
331 SYSCTL_INT(_debug_fdc, OID_AUTO, debugflags, CTLFLAG_RW, &debugflags, 0,
332 "Debug flags");
333
334 static int retries = 10;
335 SYSCTL_INT(_debug_fdc, OID_AUTO, retries, CTLFLAG_RW, &retries, 0,
336 "Number of retries to attempt");
337
338 #ifdef PC98
339 static int spec1 = NE7_SPEC_1(4, 240);
340 #else
341 static int spec1 = NE7_SPEC_1(6, 240);
342 #endif
343 SYSCTL_INT(_debug_fdc, OID_AUTO, spec1, CTLFLAG_RW, &spec1, 0,
344 "Specification byte one (step-rate + head unload)");
345
346 #ifdef PC98
347 static int spec2 = NE7_SPEC_2(2, 0);
348 #else
349 static int spec2 = NE7_SPEC_2(16, 0);
350 #endif
351 SYSCTL_INT(_debug_fdc, OID_AUTO, spec2, CTLFLAG_RW, &spec2, 0,
352 "Specification byte two (head load time + no-dma)");
353
354 static int settle;
355 SYSCTL_INT(_debug_fdc, OID_AUTO, settle, CTLFLAG_RW, &settle, 0,
356 "Head settling time in sec/hz");
357
358 static void
359 fdprinttype(struct fd_type *ft)
360 {
361
362 printf("(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,0x%x)",
363 ft->sectrac, ft->secsize, ft->datalen, ft->gap, ft->tracks,
364 ft->size, ft->trans, ft->heads, ft->f_gap, ft->f_inter,
365 ft->offset_side2, ft->flags);
366 }
367
368 static void
369 fdsettype(struct fd_data *fd, struct fd_type *ft)
370 {
371 fd->ft = ft;
372 ft->size = ft->sectrac * ft->heads * ft->tracks;
373 fd->sectorsize = 128 << fd->ft->secsize;
374 }
375
376 /*
377 * Bus space handling (access to low-level IO).
378 */
379 static inline void
380 fdregwr(struct fdc_data *fdc, int reg, uint8_t v)
381 {
382
383 bus_space_write_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg], v);
384 }
385
386 static inline uint8_t
387 fdregrd(struct fdc_data *fdc, int reg)
388 {
389
390 return bus_space_read_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg]);
391 }
392
393 static void
394 fdctl_wr(struct fdc_data *fdc, u_int8_t v)
395 {
396
397 fdregwr(fdc, FDCTL, v);
398 }
399
400 #ifndef PC98
401 static void
402 fdout_wr(struct fdc_data *fdc, u_int8_t v)
403 {
404
405 fdregwr(fdc, FDOUT, v);
406 }
407 #endif
408
409 static u_int8_t
410 fdsts_rd(struct fdc_data *fdc)
411 {
412
413 return fdregrd(fdc, FDSTS);
414 }
415
416 #ifndef PC98
417 static void
418 fddsr_wr(struct fdc_data *fdc, u_int8_t v)
419 {
420
421 fdregwr(fdc, FDDSR, v);
422 }
423 #endif
424
425 static void
426 fddata_wr(struct fdc_data *fdc, u_int8_t v)
427 {
428
429 fdregwr(fdc, FDDATA, v);
430 }
431
432 static u_int8_t
433 fddata_rd(struct fdc_data *fdc)
434 {
435
436 return fdregrd(fdc, FDDATA);
437 }
438
439 #ifndef PC98
440 static u_int8_t
441 fdin_rd(struct fdc_data *fdc)
442 {
443
444 return fdregrd(fdc, FDCTL);
445 }
446 #endif
447
448 /*
449 * Magic pseudo-DMA initialization for YE FDC. Sets count and
450 * direction.
451 */
452 static void
453 fdbcdr_wr(struct fdc_data *fdc, int iswrite, uint16_t count)
454 {
455 fdregwr(fdc, FDBCDR, (count - 1) & 0xff);
456 fdregwr(fdc, FDBCDR + 1,
457 (iswrite ? 0x80 : 0) | (((count - 1) >> 8) & 0x7f));
458 }
459
460 static int
461 fdc_err(struct fdc_data *fdc, const char *s)
462 {
463 fdc->fdc_errs++;
464 if (s) {
465 if (fdc->fdc_errs < FDC_ERRMAX)
466 device_printf(fdc->fdc_dev, "%s", s);
467 else if (fdc->fdc_errs == FDC_ERRMAX)
468 device_printf(fdc->fdc_dev, "too many errors, not "
469 "logging any more\n");
470 }
471
472 return (1);
473 }
474
475 /*
476 * FDC IO functions, take care of the main status register, timeout
477 * in case the desired status bits are never set.
478 *
479 * These PIO loops initially start out with short delays between
480 * each iteration in the expectation that the required condition
481 * is usually met quickly, so it can be handled immediately.
482 */
483 static int
484 fdc_in(struct fdc_data *fdc, int *ptr)
485 {
486 int i, j, step;
487
488 step = 1;
489 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
490 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
491 if (i == (NE7_DIO|NE7_RQM)) {
492 i = fddata_rd(fdc);
493 if (ptr)
494 *ptr = i;
495 return (0);
496 }
497 if (i == NE7_RQM)
498 return (fdc_err(fdc, "ready for output in input\n"));
499 step += step;
500 DELAY(step);
501 }
502 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
503 }
504
505 static int
506 fdc_out(struct fdc_data *fdc, int x)
507 {
508 int i, j, step;
509
510 step = 1;
511 for (j = 0; j < FDSTS_TIMEOUT; j += step) {
512 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
513 if (i == NE7_RQM) {
514 fddata_wr(fdc, x);
515 return (0);
516 }
517 if (i == (NE7_DIO|NE7_RQM))
518 return (fdc_err(fdc, "ready for input in output\n"));
519 step += step;
520 DELAY(step);
521 }
522 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
523 }
524
525 /*
526 * fdc_cmd: Send a command to the chip.
527 * Takes a varargs with this structure:
528 * # of output bytes
529 * output bytes as int [...]
530 * # of input bytes
531 * input bytes as int* [...]
532 */
533 static int
534 fdc_cmd(struct fdc_data *fdc, int n_out, ...)
535 {
536 u_char cmd = 0;
537 int n_in;
538 int n, i;
539 va_list ap;
540
541 va_start(ap, n_out);
542 for (n = 0; n < n_out; n++) {
543 i = va_arg(ap, int);
544 if (n == 0)
545 cmd = i;
546 if (fdc_out(fdc, i) < 0) {
547 char msg[50];
548 snprintf(msg, sizeof(msg),
549 "cmd %x failed at out byte %d of %d\n",
550 cmd, n + 1, n_out);
551 fdc->flags |= FDC_NEEDS_RESET;
552 va_end(ap);
553 return fdc_err(fdc, msg);
554 }
555 }
556 n_in = va_arg(ap, int);
557 for (n = 0; n < n_in; n++) {
558 int *ptr = va_arg(ap, int *);
559 if (fdc_in(fdc, ptr) < 0) {
560 char msg[50];
561 snprintf(msg, sizeof(msg),
562 "cmd %02x failed at in byte %d of %d\n",
563 cmd, n + 1, n_in);
564 fdc->flags |= FDC_NEEDS_RESET;
565 va_end(ap);
566 return fdc_err(fdc, msg);
567 }
568 }
569 va_end(ap);
570 return (0);
571 }
572
573 #ifdef PC98
574 static void fd_motor(struct fd_data *fd, int turnon);
575
576 static int pc98_trans = 0; /* 0 : HD , 1 : DD , 2 : 1.44 */
577 static int pc98_trans_prev = -1;
578
579 static void
580 set_density(struct fdc_data *fdc)
581 {
582 /* always motor on */
583 fdregwr(fdc, FDP, (pc98_trans != 1 ? FDP_FDDEXC : 0) | FDP_PORTEXC);
584 DELAY(100);
585 fdctl_wr(fdc, FDC_RST | FDC_DMAE);
586 /* in the case of note W, always inhibit 100ms timer */
587 }
588
589 static int
590 pc98_fd_check_ready(struct fd_data *fd)
591 {
592 struct fdc_data *fdc = fd->fdc;
593 int retry = 0, status;
594 int fdu = device_get_unit(fd->dev);
595
596 while (retry++ < 30000) {
597 fd_motor(fd, 1);
598 fdc_out(fdc, NE7CMD_SENSED); /* Sense Drive Status */
599 DELAY(100);
600 fdc_out(fdc, fdu); /* Drive number */
601 DELAY(100);
602 if ((fdc_in(fdc, &status) == 0) && (status & NE7_ST3_RD)) {
603 fdctl_wr(fdc, FDC_DMAE | FDC_MTON);
604 DELAY(10);
605 return (0);
606 }
607 }
608 return (-1);
609 }
610
611 static void
612 pc98_fd_check_type(struct fd_data *fd, int unit)
613 {
614 struct fdc_data *fdc;
615
616 if (fd->type != FDT_NONE || unit < 0 || unit > 3)
617 return;
618
619 fdc = fd->fdc;
620
621 /* Look up what the BIOS thinks we have. */
622 if (!((PC98_SYSTEM_PARAMETER(0x55c) >> unit) & 0x01)) {
623 fd->type = FDT_NONE;
624 return;
625 }
626 if ((PC98_SYSTEM_PARAMETER(0x5ae) >> unit) & 0x01) {
627 /* Check 3mode I/F */
628 fd->pc98_trans = 0;
629 fdregwr(fdc, FDEM, (unit << 5) | 0x10);
630 if (!(fdregrd(fdc, FDEM) & 0x01)) {
631 fd->type = FDT_144M;
632 return;
633 }
634 device_printf(fd->dev,
635 "Warning: can't control 3mode I/F, fallback to 2mode.\n");
636 }
637
638 fd->type = FDT_12M;
639 }
640 #endif /* PC98 */
641
642 static void
643 fdc_reset(struct fdc_data *fdc)
644 {
645 int i, r[10];
646
647 #ifdef PC98
648 set_density(fdc);
649 if (pc98_machine_type & M_EPSON_PC98)
650 fdctl_wr(fdc, FDC_RST | FDC_RDY | FDC_DD | FDC_MTON);
651 else
652 fdctl_wr(fdc, FDC_RST | FDC_RDY | FDC_DMAE | FDC_MTON);
653 DELAY(200);
654 fdctl_wr(fdc, FDC_DMAE | FDC_MTON);
655 DELAY(10);
656 #else
657 if (fdc->fdct == FDC_ENHANCED) {
658 /* Try a software reset, default precomp, and 500 kb/s */
659 fddsr_wr(fdc, I8207X_DSR_SR);
660 } else {
661 /* Try a hardware reset, keep motor on */
662 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
663 DELAY(100);
664 /* enable FDC, but defer interrupts a moment */
665 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
666 }
667 DELAY(100);
668 fdout_wr(fdc, fdc->fdout);
669 #endif
670
671 /* XXX after a reset, silently believe the FDC will accept commands */
672 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, spec1, spec2, 0))
673 device_printf(fdc->fdc_dev, " SPECIFY failed in reset\n");
674
675 if (fdc->fdct == FDC_ENHANCED) {
676 if (fdc_cmd(fdc, 4,
677 I8207X_CONFIG,
678 0,
679 /* 0x40 | */ /* Enable Implied Seek -
680 * breaks 2step! */
681 0x10 | /* Polling disabled */
682 (fifo_threshold - 1), /* Fifo threshold */
683 0x00, /* Precomp track */
684 0))
685 device_printf(fdc->fdc_dev,
686 " CONFIGURE failed in reset\n");
687 if (debugflags & 1) {
688 if (fdc_cmd(fdc, 1,
689 I8207X_DUMPREG,
690 10, &r[0], &r[1], &r[2], &r[3], &r[4],
691 &r[5], &r[6], &r[7], &r[8], &r[9]))
692 device_printf(fdc->fdc_dev,
693 " DUMPREG failed in reset\n");
694 for (i = 0; i < 10; i++)
695 printf(" %02x", r[i]);
696 printf("\n");
697 }
698 }
699 }
700
701 static int
702 fdc_sense_drive(struct fdc_data *fdc, int *st3p)
703 {
704 int st3;
705
706 if (fdc_cmd(fdc, 2, NE7CMD_SENSED, fdc->fd->fdsu, 1, &st3))
707 return (fdc_err(fdc, "Sense Drive Status failed\n"));
708 if (st3p)
709 *st3p = st3;
710 return (0);
711 }
712
713 static int
714 fdc_sense_int(struct fdc_data *fdc, int *st0p, int *cylp)
715 {
716 int cyl, st0, ret;
717
718 ret = fdc_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
719 if (ret) {
720 (void)fdc_err(fdc, "sense intr err reading stat reg 0\n");
721 return (ret);
722 }
723
724 if (st0p)
725 *st0p = st0;
726
727 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
728 /*
729 * There doesn't seem to have been an interrupt.
730 */
731 return (FD_NOT_VALID);
732 }
733
734 if (fdc_in(fdc, &cyl) < 0)
735 return fdc_err(fdc, "can't get cyl num\n");
736
737 if (cylp)
738 *cylp = cyl;
739
740 return (0);
741 }
742
743 static int
744 fdc_read_status(struct fdc_data *fdc)
745 {
746 int i, ret, status;
747
748 for (i = ret = 0; i < 7; i++) {
749 ret = fdc_in(fdc, &status);
750 fdc->status[i] = status;
751 if (ret != 0)
752 break;
753 }
754
755 if (ret == 0)
756 fdc->flags |= FDC_STAT_VALID;
757 else
758 fdc->flags &= ~FDC_STAT_VALID;
759
760 return ret;
761 }
762
763 #ifndef PC98
764 /*
765 * Select this drive
766 */
767 static void
768 fd_select(struct fd_data *fd)
769 {
770 struct fdc_data *fdc;
771
772 /* XXX: lock controller */
773 fdc = fd->fdc;
774 fdc->fdout &= ~FDO_FDSEL;
775 fdc->fdout |= FDO_FDMAEN | FDO_FRST | fd->fdsu;
776 fdout_wr(fdc, fdc->fdout);
777 }
778
779 static void
780 fd_turnon(void *arg)
781 {
782 struct fd_data *fd;
783 struct bio *bp;
784 int once;
785
786 fd = arg;
787 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
788 fd->flags &= ~FD_MOTORWAIT;
789 fd->flags |= FD_MOTOR;
790 once = 0;
791 for (;;) {
792 bp = bioq_takefirst(&fd->fd_bq);
793 if (bp == NULL)
794 break;
795 bioq_disksort(&fd->fdc->head, bp);
796 once = 1;
797 }
798 if (once)
799 wakeup(&fd->fdc->head);
800 }
801 #endif
802
803 static void
804 fd_motor(struct fd_data *fd, int turnon)
805 {
806 struct fdc_data *fdc;
807
808 fdc = fd->fdc;
809 /*
810 mtx_assert(&fdc->fdc_mtx, MA_OWNED);
811 */
812 #ifdef PC98
813 fdregwr(fdc, FDP, (pc98_trans != 1 ? FDP_FDDEXC : 0) | FDP_PORTEXC);
814 DELAY(10);
815 fdctl_wr(fdc, FDC_DMAE | FDC_MTON);
816 #else
817 if (turnon) {
818 fd->flags |= FD_MOTORWAIT;
819 fdc->fdout |= (FDO_MOEN0 << fd->fdsu);
820 callout_reset(&fd->toffhandle, hz, fd_turnon, fd);
821 } else {
822 callout_stop(&fd->toffhandle);
823 fd->flags &= ~(FD_MOTOR|FD_MOTORWAIT);
824 fdc->fdout &= ~(FDO_MOEN0 << fd->fdsu);
825 }
826 fdout_wr(fdc, fdc->fdout);
827 #endif
828 }
829
830 static void
831 fd_turnoff(void *xfd)
832 {
833 struct fd_data *fd = xfd;
834
835 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
836 fd_motor(fd, 0);
837 }
838
839 /*
840 * fdc_intr - wake up the worker thread.
841 */
842
843 static void
844 fdc_intr(void *arg)
845 {
846
847 wakeup(arg);
848 }
849
850 static int
851 fdc_intr_fast(void *arg)
852 {
853
854 wakeup(arg);
855 return(FILTER_HANDLED);
856 }
857
858 /*
859 * fdc_pio(): perform programmed IO read/write for YE PCMCIA floppy.
860 */
861 static void
862 fdc_pio(struct fdc_data *fdc)
863 {
864 u_char *cptr;
865 struct bio *bp;
866 u_int count;
867
868 bp = fdc->bp;
869 cptr = fdc->fd->fd_ioptr;
870 count = fdc->fd->fd_iosize;
871
872 if (bp->bio_cmd == BIO_READ) {
873 fdbcdr_wr(fdc, 0, count);
874 bus_space_read_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
875 fdc->ioff[FD_YE_DATAPORT], cptr, count);
876 } else {
877 bus_space_write_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
878 fdc->ioff[FD_YE_DATAPORT], cptr, count);
879 fdbcdr_wr(fdc, 0, count); /* needed? */
880 }
881 }
882
883 static int
884 fdc_biodone(struct fdc_data *fdc, int error)
885 {
886 struct fd_data *fd;
887 struct bio *bp;
888
889 fd = fdc->fd;
890 bp = fdc->bp;
891
892 mtx_lock(&fdc->fdc_mtx);
893 if (--fd->fd_iocount == 0)
894 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
895 fdc->bp = NULL;
896 fdc->fd = NULL;
897 mtx_unlock(&fdc->fdc_mtx);
898 if (bp->bio_to != NULL) {
899 if ((debugflags & 2) && fd->fdc->retry > 0)
900 printf("retries: %d\n", fd->fdc->retry);
901 g_io_deliver(bp, error);
902 return (0);
903 }
904 bp->bio_error = error;
905 bp->bio_flags |= BIO_DONE;
906 wakeup(bp);
907 return (0);
908 }
909
910 static int retry_line;
911
912 static int
913 fdc_worker(struct fdc_data *fdc)
914 {
915 struct fd_data *fd;
916 struct bio *bp;
917 int i, nsect;
918 int st0, st3, cyl, mfm, steptrac, cylinder, descyl, sec;
919 int head;
920 int override_error;
921 static int need_recal;
922 struct fdc_readid *idp;
923 struct fd_formb *finfo;
924
925 override_error = 0;
926
927 /* Have we exhausted our retries ? */
928 bp = fdc->bp;
929 fd = fdc->fd;
930 if (bp != NULL &&
931 (fdc->retry >= retries || (fd->options & FDOPT_NORETRY))) {
932 if ((debugflags & 4))
933 printf("Too many retries (EIO)\n");
934 if (fdc->flags & FDC_NEEDS_RESET) {
935 mtx_lock(&fdc->fdc_mtx);
936 fd->flags |= FD_EMPTY;
937 mtx_unlock(&fdc->fdc_mtx);
938 }
939 return (fdc_biodone(fdc, EIO));
940 }
941
942 /* Disable ISADMA if we bailed while it was active */
943 if (fd != NULL && (fd->flags & FD_ISADMA)) {
944 isa_dmadone(
945 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
946 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
947 mtx_lock(&fdc->fdc_mtx);
948 fd->flags &= ~FD_ISADMA;
949 mtx_unlock(&fdc->fdc_mtx);
950 }
951
952 /* Unwedge the controller ? */
953 if (fdc->flags & FDC_NEEDS_RESET) {
954 fdc->flags &= ~FDC_NEEDS_RESET;
955 fdc_reset(fdc);
956 if (cold)
957 DELAY(1000000);
958 else
959 tsleep(fdc, PRIBIO, "fdcrst", hz);
960 /* Discard results */
961 for (i = 0; i < 4; i++)
962 fdc_sense_int(fdc, &st0, &cyl);
963 /* All drives must recal */
964 need_recal = 0xf;
965 }
966
967 /* Pick up a request, if need be wait for it */
968 if (fdc->bp == NULL) {
969 mtx_lock(&fdc->fdc_mtx);
970 do {
971 fdc->bp = bioq_takefirst(&fdc->head);
972 if (fdc->bp == NULL)
973 msleep(&fdc->head, &fdc->fdc_mtx,
974 PRIBIO, "-", 0);
975 } while (fdc->bp == NULL &&
976 (fdc->flags & FDC_KTHREAD_EXIT) == 0);
977 mtx_unlock(&fdc->fdc_mtx);
978
979 if (fdc->bp == NULL)
980 /*
981 * Nothing to do, worker thread has been
982 * requested to stop.
983 */
984 return (0);
985
986 bp = fdc->bp;
987 fd = fdc->fd = bp->bio_driver1;
988 fdc->retry = 0;
989 fd->fd_ioptr = bp->bio_data;
990 if (bp->bio_cmd == BIO_FMT) {
991 i = offsetof(struct fd_formb, fd_formb_cylno(0));
992 fd->fd_ioptr += i;
993 fd->fd_iosize = bp->bio_length - i;
994 }
995 }
996
997 /* Select drive, setup params */
998 #ifdef PC98
999 pc98_trans = fd->ft->trans;
1000 if (pc98_trans_prev != pc98_trans) {
1001 int i;
1002
1003 set_density(fdc);
1004 for (i = 0; i < 10; i++) {
1005 outb(0x5f, 0);
1006 outb(0x5f, 0);
1007 }
1008 pc98_trans_prev = pc98_trans;
1009 }
1010 if (pc98_trans != fd->pc98_trans) {
1011 if (fd->type == FDT_144M) {
1012 fdregwr(fdc, FDEM,
1013 (device_get_unit(fd->dev) << 5) | 0x10 |
1014 (pc98_trans >> 1));
1015 outb(0x5f, 0);
1016 outb(0x5f, 0);
1017 }
1018 fd->pc98_trans = pc98_trans;
1019 }
1020 #else
1021 fd_select(fd);
1022 if (fdc->fdct == FDC_ENHANCED)
1023 fddsr_wr(fdc, fd->ft->trans);
1024 else
1025 fdctl_wr(fdc, fd->ft->trans);
1026 #endif
1027
1028 if (bp->bio_cmd == BIO_PROBE) {
1029 if ((!(device_get_flags(fd->dev) & FD_NO_CHLINE) &&
1030 #ifndef PC98
1031 !(fdin_rd(fdc) & FDI_DCHG) &&
1032 #endif
1033 !(fd->flags & FD_EMPTY)) ||
1034 fd_probe_disk(fd, &need_recal) == 0)
1035 return (fdc_biodone(fdc, 0));
1036 return (1);
1037 }
1038
1039 /*
1040 * If we are dead just flush the requests
1041 */
1042 if (fd->flags & FD_EMPTY)
1043 return (fdc_biodone(fdc, ENXIO));
1044
1045 #ifndef PC98
1046 /* Check if we lost our media */
1047 if (fdin_rd(fdc) & FDI_DCHG) {
1048 if (debugflags & 0x40)
1049 printf("Lost disk\n");
1050 mtx_lock(&fdc->fdc_mtx);
1051 fd->flags |= FD_EMPTY;
1052 fd->flags |= FD_NEWDISK;
1053 mtx_unlock(&fdc->fdc_mtx);
1054 g_topology_lock();
1055 g_orphan_provider(fd->fd_provider, ENXIO);
1056 fd->fd_provider->flags |= G_PF_WITHER;
1057 fd->fd_provider =
1058 g_new_providerf(fd->fd_geom, "%s", fd->fd_geom->name);
1059 g_error_provider(fd->fd_provider, 0);
1060 g_topology_unlock();
1061 return (fdc_biodone(fdc, ENXIO));
1062 }
1063 #endif
1064
1065 /* Check if the floppy is write-protected */
1066 if (bp->bio_cmd == BIO_FMT || bp->bio_cmd == BIO_WRITE) {
1067 retry_line = __LINE__;
1068 if(fdc_sense_drive(fdc, &st3) != 0)
1069 return (1);
1070 if(st3 & NE7_ST3_WP)
1071 return (fdc_biodone(fdc, EROFS));
1072 }
1073
1074 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0;
1075 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1;
1076 i = fd->ft->sectrac * fd->ft->heads;
1077 cylinder = bp->bio_pblkno / i;
1078 descyl = cylinder * steptrac;
1079 sec = bp->bio_pblkno % i;
1080 nsect = i - sec;
1081 head = sec / fd->ft->sectrac;
1082 sec = sec % fd->ft->sectrac + 1;
1083
1084 /* If everything is going swimmingly, use multisector xfer */
1085 if (fdc->retry == 0 &&
1086 (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE)) {
1087 fd->fd_iosize = imin(nsect * fd->sectorsize, bp->bio_resid);
1088 nsect = fd->fd_iosize / fd->sectorsize;
1089 } else if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) {
1090 fd->fd_iosize = fd->sectorsize;
1091 nsect = 1;
1092 }
1093
1094 /* Do RECAL if we need to or are going to track zero anyway */
1095 if ((need_recal & (1 << fd->fdsu)) ||
1096 (cylinder == 0 && fd->track != 0) ||
1097 fdc->retry > 2) {
1098 #ifdef PC98
1099 pc98_fd_check_ready(fd);
1100 #endif
1101 retry_line = __LINE__;
1102 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
1103 return (1);
1104 tsleep(fdc, PRIBIO, "fdrecal", hz);
1105 retry_line = __LINE__;
1106 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1107 return (1); /* XXX */
1108 retry_line = __LINE__;
1109 if ((st0 & 0xc0) || cyl != 0)
1110 return (1);
1111 need_recal &= ~(1 << fd->fdsu);
1112 fd->track = 0;
1113 /* let the heads settle */
1114 if (settle)
1115 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
1116 }
1117
1118 /*
1119 * SEEK to where we want to be
1120 */
1121 if (cylinder != fd->track) {
1122 #ifdef PC98
1123 pc98_fd_check_ready(fd);
1124 #endif
1125 retry_line = __LINE__;
1126 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, descyl, 0))
1127 return (1);
1128 tsleep(fdc, PRIBIO, "fdseek", hz);
1129 retry_line = __LINE__;
1130 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1131 return (1); /* XXX */
1132 retry_line = __LINE__;
1133 if ((st0 & 0xc0) || cyl != descyl) {
1134 need_recal |= (1 << fd->fdsu);
1135 return (1);
1136 }
1137 /* let the heads settle */
1138 if (settle)
1139 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
1140 }
1141 fd->track = cylinder;
1142
1143 if (debugflags & 8)
1144 printf("op %x bn %ju siz %u ptr %p retry %d\n",
1145 bp->bio_cmd, bp->bio_pblkno, fd->fd_iosize,
1146 fd->fd_ioptr, fdc->retry);
1147
1148 /* Setup ISADMA if we need it and have it */
1149 if ((bp->bio_cmd == BIO_READ ||
1150 bp->bio_cmd == BIO_WRITE ||
1151 bp->bio_cmd == BIO_FMT)
1152 && !(fdc->flags & FDC_NODMA)) {
1153 isa_dmastart(
1154 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
1155 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
1156 mtx_lock(&fdc->fdc_mtx);
1157 fd->flags |= FD_ISADMA;
1158 mtx_unlock(&fdc->fdc_mtx);
1159 }
1160
1161 /* Do PIO if we have to */
1162 if (fdc->flags & FDC_NODMA) {
1163 if (bp->bio_cmd == BIO_READ ||
1164 bp->bio_cmd == BIO_WRITE ||
1165 bp->bio_cmd == BIO_FMT)
1166 fdbcdr_wr(fdc, 1, fd->fd_iosize);
1167 if (bp->bio_cmd == BIO_WRITE ||
1168 bp->bio_cmd == BIO_FMT)
1169 fdc_pio(fdc);
1170 }
1171
1172 switch(bp->bio_cmd) {
1173 case BIO_FMT:
1174 /* formatting */
1175 finfo = (struct fd_formb *)bp->bio_data;
1176 retry_line = __LINE__;
1177 if (fdc_cmd(fdc, 6,
1178 NE7CMD_FORMAT | mfm,
1179 head << 2 | fd->fdsu,
1180 finfo->fd_formb_secshift,
1181 finfo->fd_formb_nsecs,
1182 finfo->fd_formb_gaplen,
1183 finfo->fd_formb_fillbyte, 0))
1184 return (1);
1185 break;
1186 case BIO_RDID:
1187 retry_line = __LINE__;
1188 if (fdc_cmd(fdc, 2,
1189 NE7CMD_READID | mfm,
1190 head << 2 | fd->fdsu, 0))
1191 return (1);
1192 break;
1193 case BIO_READ:
1194 retry_line = __LINE__;
1195 if (fdc_cmd(fdc, 9,
1196 NE7CMD_READ | NE7CMD_SK | mfm | NE7CMD_MT,
1197 head << 2 | fd->fdsu, /* head & unit */
1198 fd->track, /* track */
1199 head, /* head */
1200 sec, /* sector + 1 */
1201 fd->ft->secsize, /* sector size */
1202 fd->ft->sectrac, /* sectors/track */
1203 fd->ft->gap, /* gap size */
1204 fd->ft->datalen, /* data length */
1205 0))
1206 return (1);
1207 break;
1208 case BIO_WRITE:
1209 retry_line = __LINE__;
1210 if (fdc_cmd(fdc, 9,
1211 NE7CMD_WRITE | mfm | NE7CMD_MT,
1212 head << 2 | fd->fdsu, /* head & unit */
1213 fd->track, /* track */
1214 head, /* head */
1215 sec, /* sector + 1 */
1216 fd->ft->secsize, /* sector size */
1217 fd->ft->sectrac, /* sectors/track */
1218 fd->ft->gap, /* gap size */
1219 fd->ft->datalen, /* data length */
1220 0))
1221 return (1);
1222 break;
1223 default:
1224 KASSERT(0 == 1, ("Wrong bio_cmd %x\n", bp->bio_cmd));
1225 }
1226
1227 /* Wait for interrupt */
1228 i = tsleep(fdc, PRIBIO, "fddata", hz);
1229
1230 /* PIO if the read looks good */
1231 if (i == 0 && (fdc->flags & FDC_NODMA) && (bp->bio_cmd == BIO_READ))
1232 fdc_pio(fdc);
1233
1234 /* Finish DMA */
1235 if (fd->flags & FD_ISADMA) {
1236 isa_dmadone(
1237 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
1238 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
1239 mtx_lock(&fdc->fdc_mtx);
1240 fd->flags &= ~FD_ISADMA;
1241 mtx_unlock(&fdc->fdc_mtx);
1242 }
1243
1244 if (i != 0) {
1245 /*
1246 * Timeout.
1247 *
1248 * Due to IBM's brain-dead design, the FDC has a faked ready
1249 * signal, hardwired to ready == true. Thus, any command
1250 * issued if there's no diskette in the drive will _never_
1251 * complete, and must be aborted by resetting the FDC.
1252 * Many thanks, Big Blue!
1253 */
1254 retry_line = __LINE__;
1255 fdc->flags |= FDC_NEEDS_RESET;
1256 return (1);
1257 }
1258
1259 retry_line = __LINE__;
1260 if (fdc_read_status(fdc))
1261 return (1);
1262
1263 if (debugflags & 0x10)
1264 printf(" -> %x %x %x %x\n",
1265 fdc->status[0], fdc->status[1],
1266 fdc->status[2], fdc->status[3]);
1267
1268 st0 = fdc->status[0] & NE7_ST0_IC;
1269 if (st0 != 0) {
1270 retry_line = __LINE__;
1271 if (st0 == NE7_ST0_IC_AT && fdc->status[1] & NE7_ST1_OR) {
1272 /*
1273 * DMA overrun. Someone hogged the bus and
1274 * didn't release it in time for the next
1275 * FDC transfer.
1276 */
1277 return (1);
1278 }
1279 retry_line = __LINE__;
1280 if(st0 == NE7_ST0_IC_IV) {
1281 fdc->flags |= FDC_NEEDS_RESET;
1282 return (1);
1283 }
1284 retry_line = __LINE__;
1285 if(st0 == NE7_ST0_IC_AT && fdc->status[2] & NE7_ST2_WC) {
1286 need_recal |= (1 << fd->fdsu);
1287 return (1);
1288 }
1289 if (debugflags & 0x20) {
1290 printf("status %02x %02x %02x %02x %02x %02x\n",
1291 fdc->status[0], fdc->status[1], fdc->status[2],
1292 fdc->status[3], fdc->status[4], fdc->status[5]);
1293 }
1294 retry_line = __LINE__;
1295 if (fd->options & FDOPT_NOERROR)
1296 override_error = 1;
1297 else
1298 return (1);
1299 }
1300 /* All OK */
1301 switch(bp->bio_cmd) {
1302 case BIO_RDID:
1303 /* copy out ID field contents */
1304 idp = (struct fdc_readid *)bp->bio_data;
1305 idp->cyl = fdc->status[3];
1306 idp->head = fdc->status[4];
1307 idp->sec = fdc->status[5];
1308 idp->secshift = fdc->status[6];
1309 if (debugflags & 0x40)
1310 printf("c %d h %d s %d z %d\n",
1311 idp->cyl, idp->head, idp->sec, idp->secshift);
1312 break;
1313 case BIO_READ:
1314 case BIO_WRITE:
1315 bp->bio_pblkno += nsect;
1316 bp->bio_resid -= fd->fd_iosize;
1317 bp->bio_completed += fd->fd_iosize;
1318 fd->fd_ioptr += fd->fd_iosize;
1319 if (override_error) {
1320 if ((debugflags & 4))
1321 printf("FDOPT_NOERROR: returning bad data\n");
1322 } else {
1323 /* Since we managed to get something done,
1324 * reset the retry */
1325 fdc->retry = 0;
1326 if (bp->bio_resid > 0)
1327 return (0);
1328 }
1329 break;
1330 case BIO_FMT:
1331 break;
1332 }
1333 return (fdc_biodone(fdc, 0));
1334 }
1335
1336 static void
1337 fdc_thread(void *arg)
1338 {
1339 struct fdc_data *fdc;
1340
1341 fdc = arg;
1342 int i;
1343
1344 mtx_lock(&fdc->fdc_mtx);
1345 fdc->flags |= FDC_KTHREAD_ALIVE;
1346 while ((fdc->flags & FDC_KTHREAD_EXIT) == 0) {
1347 mtx_unlock(&fdc->fdc_mtx);
1348 i = fdc_worker(fdc);
1349 if (i && debugflags & 0x20) {
1350 if (fdc->bp != NULL) {
1351 g_print_bio(fdc->bp);
1352 printf("\n");
1353 }
1354 printf("Retry line %d\n", retry_line);
1355 }
1356 fdc->retry += i;
1357 mtx_lock(&fdc->fdc_mtx);
1358 }
1359 fdc->flags &= ~(FDC_KTHREAD_EXIT | FDC_KTHREAD_ALIVE);
1360 mtx_unlock(&fdc->fdc_mtx);
1361
1362 kproc_exit(0);
1363 }
1364
1365 /*
1366 * Enqueue a request.
1367 */
1368 static void
1369 fd_enqueue(struct fd_data *fd, struct bio *bp)
1370 {
1371 struct fdc_data *fdc;
1372 int call;
1373
1374 call = 0;
1375 fdc = fd->fdc;
1376 mtx_lock(&fdc->fdc_mtx);
1377 /* If we go from idle, cancel motor turnoff */
1378 if (fd->fd_iocount++ == 0)
1379 callout_stop(&fd->toffhandle);
1380 if (fd->flags & FD_MOTOR) {
1381 /* The motor is on, send it directly to the controller */
1382 bioq_disksort(&fdc->head, bp);
1383 wakeup(&fdc->head);
1384 } else {
1385 /* Queue it on the drive until the motor has started */
1386 bioq_insert_tail(&fd->fd_bq, bp);
1387 if (!(fd->flags & FD_MOTORWAIT))
1388 fd_motor(fd, 1);
1389 }
1390 mtx_unlock(&fdc->fdc_mtx);
1391 }
1392
1393 /*
1394 * Try to find out if we have a disk in the drive.
1395 */
1396 static int
1397 fd_probe_disk(struct fd_data *fd, int *recal)
1398 {
1399 struct fdc_data *fdc;
1400 int st0, st3, cyl;
1401 int oopts, ret;
1402
1403 fdc = fd->fdc;
1404 oopts = fd->options;
1405 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1406 ret = 1;
1407
1408 /*
1409 * First recal, then seek to cyl#1, this clears the old condition on
1410 * the disk change line so we can examine it for current status.
1411 */
1412 if (debugflags & 0x40)
1413 printf("New disk in probe\n");
1414 mtx_lock(&fdc->fdc_mtx);
1415 fd->flags |= FD_NEWDISK;
1416 mtx_unlock(&fdc->fdc_mtx);
1417 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
1418 goto done;
1419 tsleep(fdc, PRIBIO, "fdrecal", hz);
1420 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1421 goto done; /* XXX */
1422 if ((st0 & 0xc0) || cyl != 0)
1423 goto done;
1424
1425 /* Seek to track 1 */
1426 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, 1, 0))
1427 goto done;
1428 tsleep(fdc, PRIBIO, "fdseek", hz);
1429 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1430 goto done; /* XXX */
1431 *recal |= (1 << fd->fdsu);
1432 #ifndef PC98
1433 if (fdin_rd(fdc) & FDI_DCHG) {
1434 if (debugflags & 0x40)
1435 printf("Empty in probe\n");
1436 mtx_lock(&fdc->fdc_mtx);
1437 fd->flags |= FD_EMPTY;
1438 mtx_unlock(&fdc->fdc_mtx);
1439 } else {
1440 #else
1441 {
1442 #endif
1443 if (fdc_sense_drive(fdc, &st3) != 0)
1444 goto done;
1445 if (debugflags & 0x40)
1446 printf("Got disk in probe\n");
1447 mtx_lock(&fdc->fdc_mtx);
1448 fd->flags &= ~FD_EMPTY;
1449 if (st3 & NE7_ST3_WP)
1450 fd->flags |= FD_WP;
1451 else
1452 fd->flags &= ~FD_WP;
1453 mtx_unlock(&fdc->fdc_mtx);
1454 }
1455 ret = 0;
1456
1457 done:
1458 fd->options = oopts;
1459 return (ret);
1460 }
1461
1462 static int
1463 fdmisccmd(struct fd_data *fd, u_int cmd, void *data)
1464 {
1465 struct bio *bp;
1466 struct fd_formb *finfo;
1467 struct fdc_readid *idfield;
1468 int error;
1469
1470 bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO);
1471
1472 /*
1473 * Set up a bio request for fdstrategy(). bio_offset is faked
1474 * so that fdstrategy() will seek to the requested
1475 * cylinder, and use the desired head.
1476 */
1477 bp->bio_cmd = cmd;
1478 if (cmd == BIO_FMT) {
1479 finfo = (struct fd_formb *)data;
1480 bp->bio_pblkno =
1481 (finfo->cyl * fd->ft->heads + finfo->head) *
1482 fd->ft->sectrac;
1483 bp->bio_length = sizeof *finfo;
1484 } else if (cmd == BIO_RDID) {
1485 idfield = (struct fdc_readid *)data;
1486 bp->bio_pblkno =
1487 (idfield->cyl * fd->ft->heads + idfield->head) *
1488 fd->ft->sectrac;
1489 bp->bio_length = sizeof(struct fdc_readid);
1490 } else if (cmd == BIO_PROBE) {
1491 /* nothing */
1492 } else
1493 panic("wrong cmd in fdmisccmd()");
1494 bp->bio_offset = bp->bio_pblkno * fd->sectorsize;
1495 bp->bio_data = data;
1496 bp->bio_driver1 = fd;
1497 bp->bio_flags = 0;
1498
1499 fd_enqueue(fd, bp);
1500
1501 do {
1502 tsleep(bp, PRIBIO, "fdwait", hz);
1503 } while (!(bp->bio_flags & BIO_DONE));
1504 error = bp->bio_error;
1505
1506 free(bp, M_TEMP);
1507 return (error);
1508 }
1509
1510 /*
1511 * Try figuring out the density of the media present in our device.
1512 */
1513 static int
1514 fdautoselect(struct fd_data *fd)
1515 {
1516 struct fd_type *fdtp;
1517 struct fdc_readid id;
1518 int oopts, rv;
1519
1520 if (!(fd->ft->flags & FL_AUTO))
1521 return (0);
1522
1523 fdtp = fd_native_types[fd->type];
1524 fdsettype(fd, fdtp);
1525 if (!(fd->ft->flags & FL_AUTO))
1526 return (0);
1527
1528 /*
1529 * Try reading sector ID fields, first at cylinder 0, head 0,
1530 * then at cylinder 2, head N. We don't probe cylinder 1,
1531 * since for 5.25in DD media in a HD drive, there are no data
1532 * to read (2 step pulses per media cylinder required). For
1533 * two-sided media, the second probe always goes to head 1, so
1534 * we can tell them apart from single-sided media. As a
1535 * side-effect this means that single-sided media should be
1536 * mentioned in the search list after two-sided media of an
1537 * otherwise identical density. Media with a different number
1538 * of sectors per track but otherwise identical parameters
1539 * cannot be distinguished at all.
1540 *
1541 * If we successfully read an ID field on both cylinders where
1542 * the recorded values match our expectation, we are done.
1543 * Otherwise, we try the next density entry from the table.
1544 *
1545 * Stepping to cylinder 2 has the side-effect of clearing the
1546 * unit attention bit.
1547 */
1548 oopts = fd->options;
1549 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1550 for (; fdtp->heads; fdtp++) {
1551 fdsettype(fd, fdtp);
1552
1553 id.cyl = id.head = 0;
1554 rv = fdmisccmd(fd, BIO_RDID, &id);
1555 if (rv != 0)
1556 continue;
1557 if (id.cyl != 0 || id.head != 0 || id.secshift != fdtp->secsize)
1558 continue;
1559 id.cyl = 2;
1560 id.head = fd->ft->heads - 1;
1561 rv = fdmisccmd(fd, BIO_RDID, &id);
1562 if (id.cyl != 2 || id.head != fdtp->heads - 1 ||
1563 id.secshift != fdtp->secsize)
1564 continue;
1565 if (rv == 0)
1566 break;
1567 }
1568
1569 fd->options = oopts;
1570 if (fdtp->heads == 0) {
1571 if (debugflags & 0x40)
1572 device_printf(fd->dev, "autoselection failed\n");
1573 fdsettype(fd, fd_native_types[fd->type]);
1574 return (-1);
1575 } else {
1576 if (debugflags & 0x40) {
1577 device_printf(fd->dev,
1578 "autoselected %d KB medium\n",
1579 #ifdef PC98
1580 (128 << (fd->ft->secsize)) * fd->ft->size / 1024);
1581 #else
1582 fd->ft->size / 2);
1583 #endif
1584 fdprinttype(fd->ft);
1585 }
1586 return (0);
1587 }
1588 }
1589
1590 /*
1591 * GEOM class implementation
1592 */
1593
1594 static g_access_t fd_access;
1595 static g_start_t fd_start;
1596 static g_ioctl_t fd_ioctl;
1597
1598 struct g_class g_fd_class = {
1599 .name = "FD",
1600 .version = G_VERSION,
1601 .start = fd_start,
1602 .access = fd_access,
1603 .ioctl = fd_ioctl,
1604 };
1605
1606 static int
1607 fd_access(struct g_provider *pp, int r, int w, int e)
1608 {
1609 struct fd_data *fd;
1610 struct fdc_data *fdc;
1611 int ar, aw, ae;
1612 int busy;
1613
1614 fd = pp->geom->softc;
1615 fdc = fd->fdc;
1616
1617 /*
1618 * If our provider is withering, we can only get negative requests
1619 * and we don't want to even see them
1620 */
1621 if (pp->flags & G_PF_WITHER)
1622 return (0);
1623
1624 ar = r + pp->acr;
1625 aw = w + pp->acw;
1626 ae = e + pp->ace;
1627
1628 if (ar == 0 && aw == 0 && ae == 0) {
1629 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR);
1630 device_unbusy(fd->dev);
1631 return (0);
1632 }
1633
1634 busy = 0;
1635 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) {
1636 #ifdef PC98
1637 if (pc98_fd_check_ready(fd) == -1)
1638 return (ENXIO);
1639 #endif
1640 if (fdmisccmd(fd, BIO_PROBE, NULL))
1641 return (ENXIO);
1642 if (fd->flags & FD_EMPTY)
1643 return (ENXIO);
1644 if (fd->flags & FD_NEWDISK) {
1645 if (fdautoselect(fd) != 0 &&
1646 (device_get_flags(fd->dev) & FD_NO_CHLINE)) {
1647 mtx_lock(&fdc->fdc_mtx);
1648 fd->flags |= FD_EMPTY;
1649 mtx_unlock(&fdc->fdc_mtx);
1650 return (ENXIO);
1651 }
1652 mtx_lock(&fdc->fdc_mtx);
1653 fd->flags &= ~FD_NEWDISK;
1654 mtx_unlock(&fdc->fdc_mtx);
1655 }
1656 device_busy(fd->dev);
1657 busy = 1;
1658 }
1659
1660 if (w > 0 && (fd->flags & FD_WP)) {
1661 if (busy)
1662 device_unbusy(fd->dev);
1663 return (EROFS);
1664 }
1665
1666 pp->sectorsize = fd->sectorsize;
1667 pp->stripesize = fd->ft->heads * fd->ft->sectrac * fd->sectorsize;
1668 pp->mediasize = pp->stripesize * fd->ft->tracks;
1669 return (0);
1670 }
1671
1672 static void
1673 fd_start(struct bio *bp)
1674 {
1675 struct fdc_data * fdc;
1676 struct fd_data * fd;
1677
1678 fd = bp->bio_to->geom->softc;
1679 fdc = fd->fdc;
1680 bp->bio_driver1 = fd;
1681 if (bp->bio_cmd == BIO_GETATTR) {
1682 if (g_handleattr_int(bp, "GEOM::fwsectors", fd->ft->sectrac))
1683 return;
1684 if (g_handleattr_int(bp, "GEOM::fwheads", fd->ft->heads))
1685 return;
1686 g_io_deliver(bp, ENOIOCTL);
1687 return;
1688 }
1689 if (!(bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE)) {
1690 g_io_deliver(bp, EOPNOTSUPP);
1691 return;
1692 }
1693 bp->bio_pblkno = bp->bio_offset / fd->sectorsize;
1694 bp->bio_resid = bp->bio_length;
1695 fd_enqueue(fd, bp);
1696 return;
1697 }
1698
1699 static int
1700 fd_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td)
1701 {
1702 struct fd_data *fd;
1703 struct fdc_status *fsp;
1704 struct fdc_readid *rid;
1705 int error;
1706
1707 fd = pp->geom->softc;
1708
1709 #ifdef PC98
1710 pc98_fd_check_ready(fd);
1711 #endif
1712
1713 switch (cmd) {
1714 case FD_GTYPE: /* get drive type */
1715 *(struct fd_type *)data = *fd->ft;
1716 return (0);
1717
1718 case FD_STYPE: /* set drive type */
1719 /*
1720 * Allow setting drive type temporarily iff
1721 * currently unset. Used for fdformat so any
1722 * user can set it, and then start formatting.
1723 */
1724 fd->fts = *(struct fd_type *)data;
1725 if (fd->fts.sectrac) {
1726 /* XXX: check for rubbish */
1727 fdsettype(fd, &fd->fts);
1728 } else {
1729 fdsettype(fd, fd_native_types[fd->type]);
1730 }
1731 if (debugflags & 0x40)
1732 fdprinttype(fd->ft);
1733 return (0);
1734
1735 case FD_GOPTS: /* get drive options */
1736 *(int *)data = fd->options;
1737 return (0);
1738
1739 case FD_SOPTS: /* set drive options */
1740 fd->options = *(int *)data;
1741 return (0);
1742
1743 case FD_CLRERR:
1744 error = priv_check(td, PRIV_DRIVER);
1745 if (error)
1746 return (error);
1747 fd->fdc->fdc_errs = 0;
1748 return (0);
1749
1750 case FD_GSTAT:
1751 fsp = (struct fdc_status *)data;
1752 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
1753 return (EINVAL);
1754 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
1755 return (0);
1756
1757 case FD_GDTYPE:
1758 *(enum fd_drivetype *)data = fd->type;
1759 return (0);
1760
1761 case FD_FORM:
1762 if (!(fflag & FWRITE))
1763 return (EPERM);
1764 if (((struct fd_formb *)data)->format_version !=
1765 FD_FORMAT_VERSION)
1766 return (EINVAL); /* wrong version of formatting prog */
1767 error = fdmisccmd(fd, BIO_FMT, data);
1768 mtx_lock(&fd->fdc->fdc_mtx);
1769 fd->flags |= FD_NEWDISK;
1770 mtx_unlock(&fd->fdc->fdc_mtx);
1771 break;
1772
1773 case FD_READID:
1774 rid = (struct fdc_readid *)data;
1775 if (rid->cyl > 85 || rid->head > 1)
1776 return (EINVAL);
1777 error = fdmisccmd(fd, BIO_RDID, data);
1778 break;
1779
1780 case FIONBIO:
1781 case FIOASYNC:
1782 /* For backwards compat with old fd*(8) tools */
1783 error = 0;
1784 break;
1785
1786 default:
1787 if (debugflags & 0x80)
1788 printf("Unknown ioctl %lx\n", cmd);
1789 error = ENOIOCTL;
1790 break;
1791 }
1792 return (error);
1793 };
1794
1795
1796
1797 /*
1798 * Configuration/initialization stuff, per controller.
1799 */
1800
1801 devclass_t fdc_devclass;
1802 static devclass_t fd_devclass;
1803
1804 struct fdc_ivars {
1805 int fdunit;
1806 int fdtype;
1807 };
1808
1809 void
1810 fdc_release_resources(struct fdc_data *fdc)
1811 {
1812 device_t dev;
1813 struct resource *last;
1814 int i;
1815
1816 dev = fdc->fdc_dev;
1817 if (fdc->fdc_intr)
1818 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1819 fdc->fdc_intr = NULL;
1820 if (fdc->res_irq != NULL)
1821 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
1822 fdc->res_irq);
1823 fdc->res_irq = NULL;
1824 last = NULL;
1825 for (i = 0; i < FDC_MAXREG; i++) {
1826 if (fdc->resio[i] != NULL && fdc->resio[i] != last) {
1827 bus_release_resource(dev, SYS_RES_IOPORT,
1828 fdc->ridio[i], fdc->resio[i]);
1829 last = fdc->resio[i];
1830 fdc->resio[i] = NULL;
1831 }
1832 }
1833 if (fdc->res_drq != NULL)
1834 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
1835 fdc->res_drq);
1836 fdc->res_drq = NULL;
1837 }
1838
1839 int
1840 fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
1841 {
1842 struct fdc_ivars *ivars = device_get_ivars(child);
1843
1844 switch (which) {
1845 case FDC_IVAR_FDUNIT:
1846 *result = ivars->fdunit;
1847 break;
1848 case FDC_IVAR_FDTYPE:
1849 *result = ivars->fdtype;
1850 break;
1851 default:
1852 return (ENOENT);
1853 }
1854 return (0);
1855 }
1856
1857 int
1858 fdc_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
1859 {
1860 struct fdc_ivars *ivars = device_get_ivars(child);
1861
1862 switch (which) {
1863 case FDC_IVAR_FDUNIT:
1864 ivars->fdunit = value;
1865 break;
1866 case FDC_IVAR_FDTYPE:
1867 ivars->fdtype = value;
1868 break;
1869 default:
1870 return (ENOENT);
1871 }
1872 return (0);
1873 }
1874
1875 int
1876 fdc_initial_reset(device_t dev, struct fdc_data *fdc)
1877 {
1878 int ic_type, part_id;
1879
1880 #ifdef PC98
1881 /* See if it can handle a command. */
1882 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(4, 240),
1883 NE7_SPEC_2(2, 0), 0))
1884 return (ENXIO);
1885 #else
1886 /*
1887 * A status value of 0xff is very unlikely, but not theoretically
1888 * impossible, but it is far more likely to indicate an empty bus.
1889 */
1890 if (fdsts_rd(fdc) == 0xff)
1891 return (ENXIO);
1892
1893 /*
1894 * Assert a reset to the floppy controller and check that the status
1895 * register goes to zero.
1896 */
1897 fdout_wr(fdc, 0);
1898 fdout_wr(fdc, 0);
1899 if (fdsts_rd(fdc) != 0)
1900 return (ENXIO);
1901
1902 /*
1903 * Clear the reset and see it come ready.
1904 */
1905 fdout_wr(fdc, FDO_FRST);
1906 DELAY(100);
1907 if (fdsts_rd(fdc) != 0x80)
1908 return (ENXIO);
1909
1910 /* Then, see if it can handle a command. */
1911 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(6, 240),
1912 NE7_SPEC_2(31, 0), 0))
1913 return (ENXIO);
1914 #endif
1915
1916 /*
1917 * Try to identify the chip.
1918 *
1919 * The i8272 datasheet documents that unknown commands
1920 * will return ST0 as 0x80. The i8272 is supposedly identical
1921 * to the NEC765.
1922 * The i82077SL datasheet says 0x90 for the VERSION command,
1923 * and several "superio" chips emulate this.
1924 */
1925 if (fdc_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type))
1926 return (ENXIO);
1927 if (fdc_cmd(fdc, 1, 0x18, 1, &part_id))
1928 return (ENXIO);
1929 if (bootverbose)
1930 device_printf(dev,
1931 "ic_type %02x part_id %02x\n", ic_type, part_id);
1932 switch (ic_type & 0xff) {
1933 case 0x80:
1934 device_set_desc(dev, "NEC 765 or clone");
1935 fdc->fdct = FDC_NE765;
1936 break;
1937 case 0x81:
1938 case 0x90:
1939 device_set_desc(dev,
1940 "Enhanced floppy controller");
1941 fdc->fdct = FDC_ENHANCED;
1942 break;
1943 default:
1944 device_set_desc(dev, "Generic floppy controller");
1945 fdc->fdct = FDC_UNKNOWN;
1946 break;
1947 }
1948 return (0);
1949 }
1950
1951 int
1952 fdc_detach(device_t dev)
1953 {
1954 struct fdc_data *fdc;
1955 int error;
1956
1957 fdc = device_get_softc(dev);
1958
1959 /* have our children detached first */
1960 if ((error = bus_generic_detach(dev)))
1961 return (error);
1962
1963 if (fdc->fdc_intr)
1964 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
1965 fdc->fdc_intr = NULL;
1966
1967 /* kill worker thread */
1968 mtx_lock(&fdc->fdc_mtx);
1969 fdc->flags |= FDC_KTHREAD_EXIT;
1970 wakeup(&fdc->head);
1971 while ((fdc->flags & FDC_KTHREAD_ALIVE) != 0)
1972 msleep(fdc->fdc_thread, &fdc->fdc_mtx, PRIBIO, "fdcdet", 0);
1973 mtx_unlock(&fdc->fdc_mtx);
1974
1975 /* reset controller, turn motor off */
1976 #ifdef PC98
1977 fdc_reset(fdc);
1978 #else
1979 fdout_wr(fdc, 0);
1980 #endif
1981
1982 if (!(fdc->flags & FDC_NODMA))
1983 isa_dma_release(fdc->dmachan);
1984 fdc_release_resources(fdc);
1985 mtx_destroy(&fdc->fdc_mtx);
1986 return (0);
1987 }
1988
1989 /*
1990 * Add a child device to the fdc controller. It will then be probed etc.
1991 */
1992 device_t
1993 fdc_add_child(device_t dev, const char *name, int unit)
1994 {
1995 struct fdc_ivars *ivar;
1996 device_t child;
1997
1998 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO);
1999 if (ivar == NULL)
2000 return (NULL);
2001 child = device_add_child(dev, name, unit);
2002 if (child == NULL) {
2003 free(ivar, M_DEVBUF);
2004 return (NULL);
2005 }
2006 device_set_ivars(child, ivar);
2007 ivar->fdunit = unit;
2008 ivar->fdtype = FDT_NONE;
2009 if (resource_disabled(name, unit))
2010 device_disable(child);
2011 return (child);
2012 }
2013
2014 int
2015 fdc_attach(device_t dev)
2016 {
2017 struct fdc_data *fdc;
2018 int error;
2019
2020 fdc = device_get_softc(dev);
2021 fdc->fdc_dev = dev;
2022 error = fdc_initial_reset(dev, fdc);
2023 if (error) {
2024 device_printf(dev, "does not respond\n");
2025 return (error);
2026 }
2027 error = bus_setup_intr(dev, fdc->res_irq,
2028 INTR_TYPE_BIO | INTR_ENTROPY |
2029 ((fdc->flags & FDC_NOFAST) ? INTR_MPSAFE : 0),
2030 ((fdc->flags & FDC_NOFAST) ? NULL : fdc_intr_fast),
2031 ((fdc->flags & FDC_NOFAST) ? fdc_intr : NULL),
2032 fdc, &fdc->fdc_intr);
2033 if (error) {
2034 device_printf(dev, "cannot setup interrupt\n");
2035 return (error);
2036 }
2037 if (!(fdc->flags & FDC_NODMA)) {
2038 error = isa_dma_acquire(fdc->dmachan);
2039 if (!error) {
2040 error = isa_dma_init(fdc->dmachan,
2041 MAX_BYTES_PER_CYL, M_WAITOK);
2042 if (error)
2043 isa_dma_release(fdc->dmachan);
2044 }
2045 if (error)
2046 return (error);
2047 }
2048 fdc->fdcu = device_get_unit(dev);
2049 fdc->flags |= FDC_NEEDS_RESET;
2050
2051 mtx_init(&fdc->fdc_mtx, "fdc lock", NULL, MTX_DEF);
2052
2053 /* reset controller, turn motor off, clear fdout mirror reg */
2054 #ifdef PC98
2055 fdc_reset(fdc);
2056 #else
2057 fdout_wr(fdc, fdc->fdout = 0);
2058 #endif
2059 bioq_init(&fdc->head);
2060
2061 settle = hz / 8;
2062
2063 return (0);
2064 }
2065
2066 void
2067 fdc_start_worker(device_t dev)
2068 {
2069 struct fdc_data *fdc;
2070
2071 fdc = device_get_softc(dev);
2072 kproc_create(fdc_thread, fdc, &fdc->fdc_thread, 0, 0,
2073 "fdc%d", device_get_unit(dev));
2074 }
2075
2076 int
2077 fdc_hints_probe(device_t dev)
2078 {
2079 const char *name, *dname;
2080 int i, error, dunit;
2081
2082 /*
2083 * Probe and attach any children. We should probably detect
2084 * devices from the BIOS unless overridden.
2085 */
2086 name = device_get_nameunit(dev);
2087 i = 0;
2088 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) {
2089 resource_int_value(dname, dunit, "drive", &dunit);
2090 fdc_add_child(dev, dname, dunit);
2091 }
2092
2093 if ((error = bus_generic_attach(dev)) != 0)
2094 return (error);
2095 return (0);
2096 }
2097
2098 int
2099 fdc_print_child(device_t me, device_t child)
2100 {
2101 int retval = 0, flags;
2102
2103 retval += bus_print_child_header(me, child);
2104 retval += printf(" on %s drive %d", device_get_nameunit(me),
2105 fdc_get_fdunit(child));
2106 if ((flags = device_get_flags(me)) != 0)
2107 retval += printf(" flags %#x", flags);
2108 retval += printf("\n");
2109
2110 return (retval);
2111 }
2112
2113 /*
2114 * Configuration/initialization, per drive.
2115 */
2116 static int
2117 fd_probe(device_t dev)
2118 {
2119 int unit;
2120 #ifndef PC98
2121 int i;
2122 u_int st0, st3;
2123 #endif
2124 struct fd_data *fd;
2125 struct fdc_data *fdc;
2126 int fdsu;
2127 int flags, type;
2128
2129 fdsu = fdc_get_fdunit(dev);
2130 fd = device_get_softc(dev);
2131 fdc = device_get_softc(device_get_parent(dev));
2132 flags = device_get_flags(dev);
2133
2134 fd->dev = dev;
2135 fd->fdc = fdc;
2136 fd->fdsu = fdsu;
2137 unit = device_get_unit(dev);
2138
2139 /* Auto-probe if fdinfo is present, but always allow override. */
2140 type = flags & FD_TYPEMASK;
2141 if (type == FDT_NONE && (type = fdc_get_fdtype(dev)) != FDT_NONE) {
2142 fd->type = type;
2143 goto done;
2144 } else {
2145 /* make sure fdautoselect() will be called */
2146 fd->flags = FD_EMPTY;
2147 fd->type = type;
2148 }
2149
2150 #ifdef PC98
2151 pc98_fd_check_type(fd, unit);
2152 #elif defined(__i386__) || defined(__amd64__)
2153 if (fd->type == FDT_NONE && (unit == 0 || unit == 1)) {
2154 /* Look up what the BIOS thinks we have. */
2155 if (unit == 0)
2156 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4;
2157 else
2158 fd->type = rtcin(RTC_FDISKETTE) & 0x0f;
2159 if (fd->type == FDT_288M_1)
2160 fd->type = FDT_288M;
2161 }
2162 #endif /* __i386__ || __amd64__ */
2163 /* is there a unit? */
2164 if (fd->type == FDT_NONE)
2165 return (ENXIO);
2166
2167 #ifndef PC98
2168 mtx_lock(&fdc->fdc_mtx);
2169
2170 /* select it */
2171 fd_select(fd);
2172 fd_motor(fd, 1);
2173 fdc->fd = fd;
2174 fdc_reset(fdc); /* XXX reset, then unreset, etc. */
2175 DELAY(1000000); /* 1 sec */
2176
2177 if ((flags & FD_NO_PROBE) == 0) {
2178 /* If we're at track 0 first seek inwards. */
2179 if ((fdc_sense_drive(fdc, &st3) == 0) &&
2180 (st3 & NE7_ST3_T0)) {
2181 /* Seek some steps... */
2182 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
2183 /* ...wait a moment... */
2184 DELAY(300000);
2185 /* make ctrlr happy: */
2186 fdc_sense_int(fdc, NULL, NULL);
2187 }
2188 }
2189
2190 for (i = 0; i < 2; i++) {
2191 /*
2192 * we must recalibrate twice, just in case the
2193 * heads have been beyond cylinder 76, since
2194 * most FDCs still barf when attempting to
2195 * recalibrate more than 77 steps
2196 */
2197 /* go back to 0: */
2198 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
2199 /* a second being enough for full stroke seek*/
2200 DELAY(i == 0 ? 1000000 : 300000);
2201
2202 /* anything responding? */
2203 if (fdc_sense_int(fdc, &st0, NULL) == 0 &&
2204 (st0 & NE7_ST0_EC) == 0)
2205 break; /* already probed successfully */
2206 }
2207 }
2208 }
2209
2210 fd_motor(fd, 0);
2211 fdc->fd = NULL;
2212 mtx_unlock(&fdc->fdc_mtx);
2213
2214 if ((flags & FD_NO_PROBE) == 0 &&
2215 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */
2216 return (ENXIO);
2217 #endif /* PC98 */
2218
2219 done:
2220
2221 switch (fd->type) {
2222 #ifdef PC98
2223 case FDT_144M:
2224 device_set_desc(dev, "1.44M FDD");
2225 break;
2226 case FDT_12M:
2227 device_set_desc(dev, "1M/640K FDD");
2228 break;
2229 #else
2230 case FDT_12M:
2231 device_set_desc(dev, "1200-KB 5.25\" drive");
2232 break;
2233 case FDT_144M:
2234 device_set_desc(dev, "1440-KB 3.5\" drive");
2235 break;
2236 case FDT_288M:
2237 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
2238 break;
2239 case FDT_360K:
2240 device_set_desc(dev, "360-KB 5.25\" drive");
2241 break;
2242 case FDT_720K:
2243 device_set_desc(dev, "720-KB 3.5\" drive");
2244 break;
2245 #endif
2246 default:
2247 return (ENXIO);
2248 }
2249 fd->track = FD_NO_TRACK;
2250 fd->fdc = fdc;
2251 fd->fdsu = fdsu;
2252 fd->options = 0;
2253 #ifdef PC98
2254 fd->pc98_trans = 0;
2255 #endif
2256 callout_init_mtx(&fd->toffhandle, &fd->fdc->fdc_mtx, 0);
2257
2258 /* initialize densities for subdevices */
2259 fdsettype(fd, fd_native_types[fd->type]);
2260 return (0);
2261 }
2262
2263 /*
2264 * We have to do this in a geom event because GEOM is not running
2265 * when fd_attach() is.
2266 * XXX: move fd_attach after geom like ata/scsi disks
2267 */
2268 static void
2269 fd_attach2(void *arg, int flag)
2270 {
2271 struct fd_data *fd;
2272
2273 fd = arg;
2274
2275 fd->fd_geom = g_new_geomf(&g_fd_class,
2276 "fd%d", device_get_unit(fd->dev));
2277 fd->fd_provider = g_new_providerf(fd->fd_geom, "%s", fd->fd_geom->name);
2278 fd->fd_geom->softc = fd;
2279 g_error_provider(fd->fd_provider, 0);
2280 }
2281
2282 static int
2283 fd_attach(device_t dev)
2284 {
2285 struct fd_data *fd;
2286
2287 fd = device_get_softc(dev);
2288 g_post_event(fd_attach2, fd, M_WAITOK, NULL);
2289 fd->flags |= FD_EMPTY;
2290 bioq_init(&fd->fd_bq);
2291
2292 return (0);
2293 }
2294
2295 static void
2296 fd_detach_geom(void *arg, int flag)
2297 {
2298 struct fd_data *fd = arg;
2299
2300 g_topology_assert();
2301 g_wither_geom(fd->fd_geom, ENXIO);
2302 }
2303
2304 static int
2305 fd_detach(device_t dev)
2306 {
2307 struct fd_data *fd;
2308
2309 fd = device_get_softc(dev);
2310 g_waitfor_event(fd_detach_geom, fd, M_WAITOK, NULL);
2311 while (device_get_state(dev) == DS_BUSY)
2312 tsleep(fd, PZERO, "fdd", hz/10);
2313 callout_drain(&fd->toffhandle);
2314
2315 return (0);
2316 }
2317
2318 static device_method_t fd_methods[] = {
2319 /* Device interface */
2320 DEVMETHOD(device_probe, fd_probe),
2321 DEVMETHOD(device_attach, fd_attach),
2322 DEVMETHOD(device_detach, fd_detach),
2323 DEVMETHOD(device_shutdown, bus_generic_shutdown),
2324 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
2325 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
2326 { 0, 0 }
2327 };
2328
2329 static driver_t fd_driver = {
2330 "fd",
2331 fd_methods,
2332 sizeof(struct fd_data)
2333 };
2334
2335 static int
2336 fdc_modevent(module_t mod, int type, void *data)
2337 {
2338
2339 return (g_modevent(NULL, type, &g_fd_class));
2340 }
2341
2342 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, fdc_modevent, 0);
Cache object: 57d658b00d14e63adb3422262d3232c3
|