FreeBSD/Linux Kernel Cross Reference
sys/i386/isa/fd.c
1 /*
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Don Ahn.
7 *
8 * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu)
9 * aided by the Linux floppy driver modifications from David Bateman
10 * (dbateman@eng.uts.edu.au).
11 *
12 * Copyright (c) 1993, 1994 by
13 * jc@irbs.UUCP (John Capo)
14 * vak@zebub.msk.su (Serge Vakulenko)
15 * ache@astral.msk.su (Andrew A. Chernov)
16 *
17 * Copyright (c) 1993, 1994, 1995 by
18 * joerg_wunsch@uriah.sax.de (Joerg Wunsch)
19 * dufault@hda.com (Peter Dufault)
20 *
21 * Redistribution and use in source and binary forms, with or without
22 * modification, are permitted provided that the following conditions
23 * are met:
24 * 1. Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * 2. Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in the
28 * documentation and/or other materials provided with the distribution.
29 * 3. All advertising materials mentioning features or use of this software
30 * must display the following acknowledgement:
31 * This product includes software developed by the University of
32 * California, Berkeley and its contributors.
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 * $FreeBSD$
51 *
52 */
53
54 #include "fd.h"
55 #include "opt_devfs.h"
56 #include "opt_fdc.h"
57
58 #if NFDC > 0
59
60 #include <sys/param.h>
61 #include <sys/systm.h>
62 #include <sys/kernel.h>
63 #include <sys/conf.h>
64 #include <sys/fcntl.h>
65 #include <machine/clock.h>
66 #include <machine/ioctl_fd.h>
67 #include <sys/disklabel.h>
68 #include <sys/buf.h>
69 #include <sys/devicestat.h>
70 #include <sys/malloc.h>
71 #include <sys/proc.h>
72 #include <sys/syslog.h>
73 #include <i386/isa/isa.h>
74 #include <i386/isa/isa_device.h>
75 #include <i386/isa/fdreg.h>
76 #include <i386/isa/fdc.h>
77 #include <i386/isa/rtc.h>
78 #include <machine/stdarg.h>
79 #ifdef DEVFS
80 #include <sys/devfsext.h>
81 #endif /* DEVFS */
82
83 /* misuse a flag to identify format operation */
84 #define B_FORMAT B_XXX
85
86 /* configuration flags */
87 #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
88 #ifdef FDC_YE
89 #define FDC_IS_PCMCIA (1 << 1) /* if successful probe, then it's
90 a PCMCIA device */
91 #endif
92
93 /* internally used only, not really from CMOS: */
94 #define RTCFDT_144M_PRETENDED 0x1000
95
96 /*
97 * this biotab field doubles as a field for the physical unit number
98 * on the controller
99 */
100 #define id_physid id_scsiid
101
102 /* error returns for fd_cmd() */
103 #define FD_FAILED -1
104 #define FD_NOT_VALID -2
105 #define FDC_ERRMAX 100 /* do not log more */
106
107 #define NUMTYPES 14
108 #define NUMDENS (NUMTYPES - 6)
109
110 /* These defines (-1) must match index for fd_types */
111 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
112 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */
113 #define FD_1720 1
114 #define FD_1480 2
115 #define FD_1440 3
116 #define FD_1200 4
117 #define FD_820 5
118 #define FD_800 6
119 #define FD_720 7
120 #define FD_360 8
121
122 #define FD_1480in5_25 9
123 #define FD_1440in5_25 10
124 #define FD_820in5_25 11
125 #define FD_800in5_25 12
126 #define FD_720in5_25 13
127 #define FD_360in5_25 14
128
129
130 static struct fd_type fd_types[NUMTYPES] =
131 {
132 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
133 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
134 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
135 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
136 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
137 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
138 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
139 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
140
141 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
142 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
143 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
144 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
145 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
146 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
147 };
148
149 #define DRVS_PER_CTLR 2 /* 2 floppies */
150
151 /***********************************************************************\
152 * Per controller structure. *
153 \***********************************************************************/
154 struct fdc_data fdc_data[NFDC];
155
156 /***********************************************************************\
157 * Per drive structure. *
158 * N per controller (DRVS_PER_CTLR) *
159 \***********************************************************************/
160 static struct fd_data {
161 struct fdc_data *fdc; /* pointer to controller structure */
162 int fdsu; /* this units number on this controller */
163 int type; /* Drive type (FD_1440...) */
164 struct fd_type *ft; /* pointer to the type descriptor */
165 int flags;
166 #define FD_OPEN 0x01 /* it's open */
167 #define FD_ACTIVE 0x02 /* it's active */
168 #define FD_MOTOR 0x04 /* motor should be on */
169 #define FD_MOTOR_WAIT 0x08 /* motor coming up */
170 int skip;
171 int hddrv;
172 #define FD_NO_TRACK -2
173 int track; /* where we think the head is */
174 int options; /* user configurable options, see ioctl_fd.h */
175 struct callout_handle toffhandle;
176 struct callout_handle tohandle;
177 struct devstat device_stats;
178 #ifdef DEVFS
179 void *bdevs[1 + NUMDENS + MAXPARTITIONS];
180 void *cdevs[1 + NUMDENS + MAXPARTITIONS];
181 #endif
182 } fd_data[NFD];
183
184 /***********************************************************************\
185 * Throughout this file the following conventions will be used: *
186 * fd is a pointer to the fd_data struct for the drive in question *
187 * fdc is a pointer to the fdc_data struct for the controller *
188 * fdu is the floppy drive unit number *
189 * fdcu is the floppy controller unit number *
190 * fdsu is the floppy drive unit number on that controller. (sub-unit) *
191 \***********************************************************************/
192
193 #ifdef FDC_YE
194 #include "card.h"
195 static int yeattach(struct isa_device *);
196 #endif
197
198 /* autoconfig functions */
199 static int fdprobe(struct isa_device *);
200 static int fdattach(struct isa_device *);
201
202 /* needed for ft driver, thus exported */
203 int in_fdc(fdcu_t);
204 int out_fdc(fdcu_t, int);
205
206 /* internal functions */
207 static void set_motor(fdcu_t, int, int);
208 # define TURNON 1
209 # define TURNOFF 0
210 static timeout_t fd_turnoff;
211 static timeout_t fd_motor_on;
212 static void fd_turnon(fdu_t);
213 static void fdc_reset(fdc_p);
214 static int fd_in(fdcu_t, int *);
215 static void fdstart(fdcu_t);
216 static timeout_t fd_iotimeout;
217 static timeout_t fd_pseudointr;
218 static ointhand2_t fdintr;
219 static int fdstate(fdcu_t, fdc_p);
220 static int retrier(fdcu_t);
221 static int fdformat(dev_t, struct fd_formb *, struct proc *);
222
223 static int enable_fifo(fdc_p fdc);
224
225 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
226
227
228 #define DEVIDLE 0
229 #define FINDWORK 1
230 #define DOSEEK 2
231 #define SEEKCOMPLETE 3
232 #define IOCOMPLETE 4
233 #define RECALCOMPLETE 5
234 #define STARTRECAL 6
235 #define RESETCTLR 7
236 #define SEEKWAIT 8
237 #define RECALWAIT 9
238 #define MOTORWAIT 10
239 #define IOTIMEDOUT 11
240 #define RESETCOMPLETE 12
241 #ifdef FDC_YE
242 #define PIOREAD 13
243 #endif
244
245 #ifdef FDC_DEBUG
246 static char const * const fdstates[] =
247 {
248 "DEVIDLE",
249 "FINDWORK",
250 "DOSEEK",
251 "SEEKCOMPLETE",
252 "IOCOMPLETE",
253 "RECALCOMPLETE",
254 "STARTRECAL",
255 "RESETCTLR",
256 "SEEKWAIT",
257 "RECALWAIT",
258 "MOTORWAIT",
259 "IOTIMEDOUT",
260 "RESETCOMPLETE",
261 #ifdef FDC_YE
262 "PIOREAD",
263 #endif
264 };
265
266 /* CAUTION: fd_debug causes huge amounts of logging output */
267 static int volatile fd_debug = 0;
268 #define TRACE0(arg) if(fd_debug) printf(arg)
269 #define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2)
270 #else /* FDC_DEBUG */
271 #define TRACE0(arg)
272 #define TRACE1(arg1, arg2)
273 #endif /* FDC_DEBUG */
274
275 #ifdef FDC_YE
276 #if NCARD > 0
277 #include <sys/select.h>
278 #include <sys/module.h>
279 #include <pccard/cardinfo.h>
280 #include <pccard/driver.h>
281 #include <pccard/slot.h>
282
283 /*
284 * PC-Card (PCMCIA) specific code.
285 */
286 static int yeinit(struct pccard_devinfo *); /* init device */
287 static void yeunload(struct pccard_devinfo *); /* Disable driver */
288 static int yeintr(struct pccard_devinfo *); /* Interrupt handler */
289
290 PCCARD_MODULE(fdc, yeinit, yeunload, yeintr, 0, bio_imask);
291
292 /*
293 * this is the secret PIO data port (offset from base)
294 */
295 #define FDC_YE_DATAPORT 6
296
297 /*
298 * Initialize the device - called from Slot manager.
299 */
300 static int yeinit(struct pccard_devinfo *devi)
301 {
302 fdc_p fdc = &fdc_data[devi->isahd.id_unit];
303
304 /* validate unit number. */
305 if (devi->isahd.id_unit >= NFDC)
306 return(ENODEV);
307 fdc->baseport = devi->isahd.id_iobase;
308 /*
309 * reset controller
310 */
311 outb(fdc->baseport+FDOUT, 0);
312 DELAY(100);
313 outb(fdc->baseport+FDOUT, FDO_FRST);
314
315 /*
316 * wire into system
317 */
318 if (yeattach(&devi->isahd) == 0)
319 return(ENXIO);
320
321 return(0);
322 }
323
324 /*
325 * yeunload - unload the driver and clear the table.
326 * XXX TODO:
327 * This is usually called when the card is ejected, but
328 * can be caused by a modunload of a controller driver.
329 * The idea is to reset the driver's view of the device
330 * and ensure that any driver entry points such as
331 * read and write do not hang.
332 */
333 static void yeunload(struct pccard_devinfo *devi)
334 {
335 if (fd_data[devi->isahd.id_unit].type == NO_TYPE)
336 return;
337
338 /*
339 * this prevents Fdopen() and fdstrategy() from attempting
340 * to access unloaded controller
341 */
342 fd_data[devi->isahd.id_unit].type = NO_TYPE;
343
344 printf("fdc%d: unload\n", devi->isahd.id_unit);
345 }
346
347 /*
348 * yeintr - Shared interrupt called from
349 * front end of PC-Card handler.
350 */
351 static int yeintr(struct pccard_devinfo *devi)
352 {
353 fdintr((fdcu_t)devi->isahd.id_unit);
354 return(1);
355 }
356 #endif /* NCARD > 0 */
357 #endif /* FDC_YE */
358
359
360 /* autoconfig structure */
361
362 struct isa_driver fdcdriver = {
363 fdprobe, fdattach, "fdc",
364 };
365
366 static d_open_t Fdopen; /* NOTE, not fdopen */
367 static d_read_t fdread;
368 static d_write_t fdwrite;
369 static d_close_t fdclose;
370 static d_ioctl_t fdioctl;
371 static d_strategy_t fdstrategy;
372
373 /* even if SLICE defined, these are needed for the ft support. */
374 #define CDEV_MAJOR 9
375 #define BDEV_MAJOR 2
376
377
378 static struct cdevsw fd_cdevsw = {
379 Fdopen, fdclose, fdread, fdwrite,
380 fdioctl, nostop, nullreset, nodevtotty,
381 seltrue, nommap, fdstrategy, "fd",
382 NULL, -1, nodump, nopsize,
383 D_DISK, 0, -1 };
384
385
386 static struct isa_device *fdcdevs[NFDC];
387
388
389 static int
390 fdc_err(fdcu_t fdcu, const char *s)
391 {
392 fdc_data[fdcu].fdc_errs++;
393 if(s) {
394 if(fdc_data[fdcu].fdc_errs < FDC_ERRMAX)
395 printf("fdc%d: %s", fdcu, s);
396 else if(fdc_data[fdcu].fdc_errs == FDC_ERRMAX)
397 printf("fdc%d: too many errors, not logging any more\n",
398 fdcu);
399 }
400
401 return FD_FAILED;
402 }
403
404 /*
405 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
406 * Unit number,
407 * # of output bytes, output bytes as ints ...,
408 * # of input bytes, input bytes as ints ...
409 */
410
411 static int
412 fd_cmd(fdcu_t fdcu, int n_out, ...)
413 {
414 u_char cmd;
415 int n_in;
416 int n;
417 va_list ap;
418
419 va_start(ap, n_out);
420 cmd = (u_char)(va_arg(ap, int));
421 va_end(ap);
422 va_start(ap, n_out);
423 for (n = 0; n < n_out; n++)
424 {
425 if (out_fdc(fdcu, va_arg(ap, int)) < 0)
426 {
427 char msg[50];
428 snprintf(msg, sizeof(msg),
429 "cmd %x failed at out byte %d of %d\n",
430 cmd, n + 1, n_out);
431 return fdc_err(fdcu, msg);
432 }
433 }
434 n_in = va_arg(ap, int);
435 for (n = 0; n < n_in; n++)
436 {
437 int *ptr = va_arg(ap, int *);
438 if (fd_in(fdcu, ptr) < 0)
439 {
440 char msg[50];
441 snprintf(msg, sizeof(msg),
442 "cmd %02x failed at in byte %d of %d\n",
443 cmd, n + 1, n_in);
444 return fdc_err(fdcu, msg);
445 }
446 }
447
448 return 0;
449 }
450
451 static int
452 enable_fifo(fdc_p fdc)
453 {
454 int i, j;
455
456 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
457
458 /*
459 * XXX:
460 * Cannot use fd_cmd the normal way here, since
461 * this might be an invalid command. Thus we send the
462 * first byte, and check for an early turn of data directon.
463 */
464
465 if (out_fdc(fdc->fdcu, I8207X_CONFIGURE) < 0)
466 return fdc_err(fdc->fdcu, "Enable FIFO failed\n");
467
468 /* If command is invalid, return */
469 j = 100000;
470 while ((i = inb(fdc->baseport + FDSTS) & (NE7_DIO | NE7_RQM))
471 != NE7_RQM && j-- > 0)
472 if (i == (NE7_DIO | NE7_RQM)) {
473 fdc_reset(fdc);
474 return FD_FAILED;
475 }
476 if (j<0 ||
477 fd_cmd(fdc->fdcu, 3,
478 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
479 fdc_reset(fdc);
480 return fdc_err(fdc->fdcu, "Enable FIFO failed\n");
481 }
482 fdc->flags |= FDC_HAS_FIFO;
483 return 0;
484 }
485 if (fd_cmd(fdc->fdcu, 4,
486 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
487 return fdc_err(fdc->fdcu, "Re-enable FIFO failed\n");
488 return 0;
489 }
490
491 static int
492 fd_sense_drive_status(fdc_p fdc, int *st3p)
493 {
494 int st3;
495
496 if (fd_cmd(fdc->fdcu, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
497 {
498 return fdc_err(fdc->fdcu, "Sense Drive Status failed\n");
499 }
500 if (st3p)
501 *st3p = st3;
502
503 return 0;
504 }
505
506 static int
507 fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
508 {
509 int st0, cyl;
510
511 int ret = fd_cmd(fdc->fdcu, 1, NE7CMD_SENSEI, 1, &st0);
512
513 if (ret)
514 {
515 (void)fdc_err(fdc->fdcu,
516 "sense intr err reading stat reg 0\n");
517 return ret;
518 }
519
520 if (st0p)
521 *st0p = st0;
522
523 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV)
524 {
525 /*
526 * There doesn't seem to have been an interrupt.
527 */
528 return FD_NOT_VALID;
529 }
530
531 if (fd_in(fdc->fdcu, &cyl) < 0)
532 {
533 return fdc_err(fdc->fdcu, "can't get cyl num\n");
534 }
535
536 if (cylp)
537 *cylp = cyl;
538
539 return 0;
540 }
541
542
543 static int
544 fd_read_status(fdc_p fdc, int fdsu)
545 {
546 int i, ret;
547
548 for (i = 0; i < 7; i++)
549 {
550 /*
551 * XXX types are poorly chosen. Only bytes can by read
552 * from the hardware, but fdc->status[] wants u_ints and
553 * fd_in() gives ints.
554 */
555 int status;
556
557 ret = fd_in(fdc->fdcu, &status);
558 fdc->status[i] = status;
559 if (ret != 0)
560 break;
561 }
562
563 if (ret == 0)
564 fdc->flags |= FDC_STAT_VALID;
565 else
566 fdc->flags &= ~FDC_STAT_VALID;
567
568 return ret;
569 }
570
571 /****************************************************************************/
572 /* autoconfiguration stuff */
573 /****************************************************************************/
574
575 /*
576 * probe for existance of controller
577 */
578 static int
579 fdprobe(struct isa_device *dev)
580 {
581 fdcu_t fdcu = dev->id_unit;
582 if(fdc_data[fdcu].flags & FDC_ATTACHED)
583 {
584 printf("fdc%d: unit used multiple times\n", fdcu);
585 return 0;
586 }
587
588 fdcdevs[fdcu] = dev;
589 fdc_data[fdcu].baseport = dev->id_iobase;
590
591 /* First - lets reset the floppy controller */
592 outb(dev->id_iobase+FDOUT, 0);
593 DELAY(100);
594 outb(dev->id_iobase+FDOUT, FDO_FRST);
595
596 /* see if it can handle a command */
597 if (fd_cmd(fdcu,
598 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
599 0))
600 {
601 return(0);
602 }
603 #ifdef FDC_YE
604 /*
605 * don't succeed on probe; wait
606 * for PCCARD subsystem to do it
607 */
608 if (dev->id_flags & FDC_IS_PCMCIA)
609 return(0);
610 #endif
611 return (IO_FDCSIZE);
612 }
613
614 /*
615 * wire controller into system, look for floppy units
616 */
617 static int
618 fdattach(struct isa_device *dev)
619 {
620 unsigned fdt;
621 fdu_t fdu;
622 fdcu_t fdcu = dev->id_unit;
623 fdc_p fdc = fdc_data + fdcu;
624 fd_p fd;
625 int fdsu, st0, st3, i;
626 struct isa_device *fdup;
627 int ic_type = 0;
628 #ifdef DEVFS
629 int mynor;
630 int typemynor;
631 int typesize;
632 #endif
633
634 dev->id_ointr = fdintr;
635 fdc->fdcu = fdcu;
636 fdc->flags |= FDC_ATTACHED;
637 fdc->dmachan = dev->id_drq;
638 /* Acquire the DMA channel forever, The driver will do the rest */
639 isa_dma_acquire(fdc->dmachan);
640 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
641 fdc->state = DEVIDLE;
642 /* reset controller, turn motor off, clear fdout mirror reg */
643 outb(fdc->baseport + FDOUT, ((fdc->fdout = 0)));
644 bufq_init(&fdc->head);
645
646 /* check for each floppy drive */
647 for (fdup = isa_biotab_fdc; fdup->id_driver != 0; fdup++) {
648 if (fdup->id_iobase != dev->id_iobase)
649 continue;
650 fdu = fdup->id_unit;
651 fd = &fd_data[fdu];
652 if (fdu >= (NFD))
653 continue;
654 fdsu = fdup->id_physid;
655 /* look up what bios thinks we have */
656 switch (fdu) {
657 case 0: if (dev->id_flags & FDC_PRETEND_D0)
658 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
659 else
660 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
661 break;
662 case 1: fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
663 break;
664 default: fdt = RTCFDT_NONE;
665 break;
666 }
667 /* is there a unit? */
668 if ((fdt == RTCFDT_NONE)
669 ) {
670 fd->type = NO_TYPE;
671 continue;
672 }
673
674 /* select it */
675 set_motor(fdcu, fdsu, TURNON);
676 DELAY(1000000); /* 1 sec */
677
678 if (ic_type == 0 &&
679 fd_cmd(fdcu, 1, NE7CMD_VERSION, 1, &ic_type) == 0)
680 {
681 #ifdef FDC_PRINT_BOGUS_CHIPTYPE
682 printf("fdc%d: ", fdcu);
683 #endif
684 ic_type = (u_char)ic_type;
685 switch( ic_type ) {
686 case 0x80:
687 #ifdef FDC_PRINT_BOGUS_CHIPTYPE
688 printf("NEC 765\n");
689 #endif
690 fdc->fdct = FDC_NE765;
691 break;
692 case 0x81:
693 #ifdef FDC_PRINT_BOGUS_CHIPTYPE
694 printf("Intel 82077\n");
695 #endif
696 fdc->fdct = FDC_I82077;
697 break;
698 case 0x90:
699 #ifdef FDC_PRINT_BOGUS_CHIPTYPE
700 printf("NEC 72065B\n");
701 #endif
702 fdc->fdct = FDC_NE72065;
703 break;
704 default:
705 #ifdef FDC_PRINT_BOGUS_CHIPTYPE
706 printf("unknown IC type %02x\n", ic_type);
707 #endif
708 fdc->fdct = FDC_UNKNOWN;
709 break;
710 }
711 if (fdc->fdct != FDC_NE765 &&
712 fdc->fdct != FDC_UNKNOWN &&
713 enable_fifo(fdc) == 0) {
714 printf("fdc%d: FIFO enabled", fdcu);
715 printf(", %d bytes threshold\n",
716 fifo_threshold);
717 }
718 }
719 if ((fd_cmd(fdcu, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) &&
720 (st3 & NE7_ST3_T0)) {
721 /* if at track 0, first seek inwards */
722 /* seek some steps: */
723 (void)fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0);
724 DELAY(300000); /* ...wait a moment... */
725 (void)fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
726 }
727
728 /* If we're at track 0 first seek inwards. */
729 if ((fd_sense_drive_status(fdc, &st3) == 0) &&
730 (st3 & NE7_ST3_T0)) {
731 /* Seek some steps... */
732 if (fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
733 /* ...wait a moment... */
734 DELAY(300000);
735 /* make ctrlr happy: */
736 (void)fd_sense_int(fdc, 0, 0);
737 }
738 }
739
740 for(i = 0; i < 2; i++) {
741 /*
742 * we must recalibrate twice, just in case the
743 * heads have been beyond cylinder 76, since most
744 * FDCs still barf when attempting to recalibrate
745 * more than 77 steps
746 */
747 /* go back to 0: */
748 if (fd_cmd(fdcu, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
749 /* a second being enough for full stroke seek*/
750 DELAY(i == 0? 1000000: 300000);
751
752 /* anything responding? */
753 if (fd_sense_int(fdc, &st0, 0) == 0 &&
754 (st0 & NE7_ST0_EC) == 0)
755 break; /* already probed succesfully */
756 }
757 }
758
759 set_motor(fdcu, fdsu, TURNOFF);
760
761 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
762 continue;
763
764 fd->track = FD_NO_TRACK;
765 fd->fdc = fdc;
766 fd->fdsu = fdsu;
767 fd->options = 0;
768 callout_handle_init(&fd->toffhandle);
769 callout_handle_init(&fd->tohandle);
770 printf("fd%d: ", fdu);
771
772 switch (fdt) {
773 case RTCFDT_12M:
774 printf("1.2MB 5.25in\n");
775 fd->type = FD_1200;
776 break;
777 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
778 printf("config-pretended ");
779 fdt = RTCFDT_144M;
780 /* fallthrough */
781 case RTCFDT_144M:
782 printf("1.44MB 3.5in\n");
783 fd->type = FD_1440;
784 break;
785 case RTCFDT_288M:
786 case RTCFDT_288M_1:
787 printf("2.88MB 3.5in - 1.44MB mode\n");
788 fd->type = FD_1440;
789 break;
790 case RTCFDT_360K:
791 printf("360KB 5.25in\n");
792 fd->type = FD_360;
793 break;
794 case RTCFDT_720K:
795 printf("720KB 3.5in\n");
796 fd->type = FD_720;
797 break;
798 default:
799 printf("unknown\n");
800 fd->type = NO_TYPE;
801 continue;
802 }
803 #ifdef DEVFS
804 mynor = fdu << 6;
805 fd->bdevs[0] = devfs_add_devswf(&fd_cdevsw, mynor, DV_BLK,
806 UID_ROOT, GID_OPERATOR, 0640,
807 "fd%d", fdu);
808 fd->cdevs[0] = devfs_add_devswf(&fd_cdevsw, mynor, DV_CHR,
809 UID_ROOT, GID_OPERATOR, 0640,
810 "rfd%d", fdu);
811 for (i = 1; i < 1 + NUMDENS; i++) {
812 /*
813 * XXX this and the lookup in Fdopen() should be
814 * data driven.
815 */
816 switch (fd->type) {
817 case FD_360:
818 if (i != FD_360)
819 continue;
820 break;
821 case FD_720:
822 if (i != FD_720 && i != FD_800 && i != FD_820)
823 continue;
824 break;
825 case FD_1200:
826 if (i != FD_360 && i != FD_720 && i != FD_800
827 && i != FD_820 && i != FD_1200
828 && i != FD_1440 && i != FD_1480)
829 continue;
830 break;
831 case FD_1440:
832 if (i != FD_720 && i != FD_800 && i != FD_820
833 && i != FD_1200 && i != FD_1440
834 && i != FD_1480 && i != FD_1720)
835 continue;
836 break;
837 }
838 typesize = fd_types[i - 1].size / 2;
839 /*
840 * XXX all these conversions give bloated code and
841 * confusing names.
842 */
843 if (typesize == 1476)
844 typesize = 1480;
845 if (typesize == 1722)
846 typesize = 1720;
847 typemynor = mynor | i;
848 fd->bdevs[i] =
849 devfs_add_devswf(&fd_cdevsw, typemynor, DV_BLK,
850 UID_ROOT, GID_OPERATOR, 0640,
851 "fd%d.%d", fdu, typesize);
852 fd->cdevs[i] =
853 devfs_add_devswf(&fd_cdevsw, typemynor, DV_CHR,
854 UID_ROOT, GID_OPERATOR, 0640,
855 "rfd%d.%d", fdu, typesize);
856 }
857
858 for (i = 0; i < MAXPARTITIONS; i++) {
859 fd->bdevs[1 + NUMDENS + i] = devfs_makelink(fd->bdevs[0],
860 "fd%d%c", fdu, 'a' + i);
861 fd->cdevs[1 + NUMDENS + i] =
862 devfs_makelink(fd->cdevs[0],
863 "rfd%d%c", fdu, 'a' + i);
864 }
865 #endif /* DEVFS */
866 /*
867 * Export the drive to the devstat interface.
868 */
869 devstat_add_entry(&fd->device_stats, "fd",
870 fdu, 512,
871 DEVSTAT_NO_ORDERED_TAGS,
872 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
873 DEVSTAT_PRIORITY_FD);
874
875 }
876
877 return (1);
878 }
879
880
881
882 #ifdef FDC_YE
883 /*
884 * this is a subset of fdattach() optimized for the Y-E Data
885 * PCMCIA floppy drive.
886 */
887 static int yeattach(struct isa_device *dev)
888 {
889 fdcu_t fdcu = dev->id_unit;
890 fdc_p fdc = fdc_data + fdcu;
891 fdsu_t fdsu = 0; /* assume 1 drive per YE controller */
892 fdu_t fdu;
893 fd_p fd;
894 int st0, st3, i;
895 #ifdef DEVFS
896 int mynor;
897 int typemynor;
898 int typesize;
899 #endif
900 fdc->fdcu = fdcu;
901 /*
902 * the FDC_PCMCIA flag is used to to indicate special PIO is used
903 * instead of DMA
904 */
905 fdc->flags = FDC_ATTACHED|FDC_PCMCIA;
906 fdc->state = DEVIDLE;
907 /* reset controller, turn motor off, clear fdout mirror reg */
908 outb(fdc->baseport + FDOUT, ((fdc->fdout = 0)));
909 bufq_init(&fdc->head);
910 /*
911 * assume 2 drives/ "normal" controller
912 */
913 fdu = fdcu * 2;
914 if (fdu >= NFD) {
915 printf("fdu %d >= NFD\n",fdu);
916 return(0);
917 };
918 fd = &fd_data[fdu];
919
920 set_motor(fdcu, fdsu, TURNON);
921 DELAY(1000000); /* 1 sec */
922 fdc->fdct = FDC_NE765;
923
924 if ((fd_cmd(fdcu, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) &&
925 (st3 & NE7_ST3_T0)) {
926 /* if at track 0, first seek inwards */
927 /* seek some steps: */
928 (void)fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0);
929 DELAY(300000); /* ...wait a moment... */
930 (void)fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
931 }
932
933 /* If we're at track 0 first seek inwards. */
934 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
935 /* Seek some steps... */
936 if (fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
937 /* ...wait a moment... */
938 DELAY(300000);
939 /* make ctrlr happy: */
940 (void)fd_sense_int(fdc, 0, 0);
941 }
942 }
943
944 for(i = 0; i < 2; i++) {
945 /*
946 * we must recalibrate twice, just in case the
947 * heads have been beyond cylinder 76, since most
948 * FDCs still barf when attempting to recalibrate
949 * more than 77 steps
950 */
951 /* go back to 0: */
952 if (fd_cmd(fdcu, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
953 /* a second being enough for full stroke seek*/
954 DELAY(i == 0? 1000000: 300000);
955
956 /* anything responding? */
957 if (fd_sense_int(fdc, &st0, 0) == 0 &&
958 (st0 & NE7_ST0_EC) == 0)
959 break; /* already probed succesfully */
960 }
961 }
962
963 set_motor(fdcu, fdsu, TURNOFF);
964
965 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
966 return(0);
967
968 fd->track = FD_NO_TRACK;
969 fd->fdc = fdc;
970 fd->fdsu = fdsu;
971 fd->options = 0;
972 printf("fdc%d: 1.44MB 3.5in PCMCIA\n", fdcu);
973 fd->type = FD_1440;
974
975 #ifdef DEVFS
976 mynor = fdcu << 6;
977 fd->bdevs[0] = devfs_add_devswf(&fd_cdevsw, mynor, DV_BLK,
978 UID_ROOT, GID_OPERATOR, 0640,
979 "fd%d", fdu);
980 fd->cdevs[0] = devfs_add_devswf(&fd_cdevsw, mynor, DV_CHR,
981 UID_ROOT, GID_OPERATOR, 0640,
982 "rfd%d", fdu);
983 /*
984 * XXX this and the lookup in Fdopen() should be
985 * data driven.
986 */
987 typemynor = mynor | FD_1440;
988 typesize = fd_types[FD_1440 - 1].size / 2;
989 /*
990 * XXX all these conversions give bloated code and
991 * confusing names.
992 */
993 if (typesize == 1476)
994 typesize = 1480;
995 if (typesize == 1722)
996 typesize = 1720;
997 fd->bdevs[FD_1440] = devfs_add_devswf(&fd_cdevsw, typemynor,
998 DV_BLK, UID_ROOT, GID_OPERATOR,
999 0640, "fd%d.%d", fdu, typesize);
1000 fd->cdevs[FD_1440] = devfs_add_devswf(&fd_cdevsw, typemynor,
1001 DV_CHR, UID_ROOT, GID_OPERATOR,
1002 0640,"rfd%d.%d", fdu, typesize);
1003 for (i = 0; i < MAXPARTITIONS; i++) {
1004 fd->bdevs[1 + NUMDENS + i] = devfs_makelink(fd->bdevs[0],
1005 "fd%d%c", fdu, 'a' + i);
1006 fd->cdevs[1 + NUMDENS + i] = devfs_makelink(fd->cdevs[0],
1007 "rfd%d%c", fdu, 'a' + i);
1008 }
1009 #endif /* DEVFS */
1010 return (1);
1011 }
1012 #endif
1013
1014 /****************************************************************************/
1015 /* motor control stuff */
1016 /* remember to not deselect the drive we're working on */
1017 /****************************************************************************/
1018 static void
1019 set_motor(fdcu_t fdcu, int fdsu, int turnon)
1020 {
1021 int fdout = fdc_data[fdcu].fdout;
1022 int needspecify = 0;
1023
1024 if(turnon) {
1025 fdout &= ~FDO_FDSEL;
1026 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1027 } else
1028 fdout &= ~(FDO_MOEN0 << fdsu);
1029
1030 if(!turnon
1031 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1032 /* gonna turn off the last drive, put FDC to bed */
1033 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1034 else {
1035 /* make sure controller is selected and specified */
1036 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1037 needspecify = 1;
1038 fdout |= (FDO_FRST|FDO_FDMAEN);
1039 }
1040
1041 outb(fdc_data[fdcu].baseport+FDOUT, fdout);
1042 fdc_data[fdcu].fdout = fdout;
1043 TRACE1("[0x%x->FDOUT]", fdout);
1044
1045 if(needspecify) {
1046 /*
1047 * XXX
1048 * special case: since we have just woken up the FDC
1049 * from its sleep, we silently assume the command will
1050 * be accepted, and do not test for a timeout
1051 */
1052 (void)fd_cmd(fdcu, 3, NE7CMD_SPECIFY,
1053 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1054 0);
1055 if (fdc_data[fdcu].flags & FDC_HAS_FIFO)
1056 (void) enable_fifo(&fdc_data[fdcu]);
1057 }
1058 }
1059
1060 static void
1061 fd_turnoff(void *arg1)
1062 {
1063 fdu_t fdu = (fdu_t)arg1;
1064 int s;
1065 fd_p fd = fd_data + fdu;
1066
1067 TRACE1("[fd%d: turnoff]", fdu);
1068
1069 /*
1070 * Don't turn off the motor yet if the drive is active.
1071 * XXX shouldn't even schedule turnoff until drive is inactive
1072 * and nothing is queued on it.
1073 */
1074 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fdu) {
1075 fd->toffhandle = timeout(fd_turnoff, arg1, 4 * hz);
1076 return;
1077 }
1078
1079 s = splbio();
1080 fd->flags &= ~FD_MOTOR;
1081 set_motor(fd->fdc->fdcu, fd->fdsu, TURNOFF);
1082 splx(s);
1083 }
1084
1085 static void
1086 fd_motor_on(void *arg1)
1087 {
1088 fdu_t fdu = (fdu_t)arg1;
1089 int s;
1090
1091 fd_p fd = fd_data + fdu;
1092 s = splbio();
1093 fd->flags &= ~FD_MOTOR_WAIT;
1094 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1095 {
1096 fdintr(fd->fdc->fdcu);
1097 }
1098 splx(s);
1099 }
1100
1101 static void
1102 fd_turnon(fdu_t fdu)
1103 {
1104 fd_p fd = fd_data + fdu;
1105 if(!(fd->flags & FD_MOTOR))
1106 {
1107 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1108 set_motor(fd->fdc->fdcu, fd->fdsu, TURNON);
1109 timeout(fd_motor_on, (caddr_t)fdu, hz); /* in 1 sec its ok */
1110 }
1111 }
1112
1113 static void
1114 fdc_reset(fdc_p fdc)
1115 {
1116 fdcu_t fdcu = fdc->fdcu;
1117
1118 /* Try a reset, keep motor on */
1119 outb(fdc->baseport + FDOUT, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1120 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1121 DELAY(100);
1122 /* enable FDC, but defer interrupts a moment */
1123 outb(fdc->baseport + FDOUT, fdc->fdout & ~FDO_FDMAEN);
1124 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1125 DELAY(100);
1126 outb(fdc->baseport + FDOUT, fdc->fdout);
1127 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1128
1129 /* XXX after a reset, silently believe the FDC will accept commands */
1130 (void)fd_cmd(fdcu, 3, NE7CMD_SPECIFY,
1131 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1132 0);
1133 if (fdc->flags & FDC_HAS_FIFO)
1134 (void) enable_fifo(fdc);
1135 }
1136
1137 /****************************************************************************/
1138 /* fdc in/out */
1139 /****************************************************************************/
1140 int
1141 in_fdc(fdcu_t fdcu)
1142 {
1143 int baseport = fdc_data[fdcu].baseport;
1144 int i, j = 100000;
1145 while ((i = inb(baseport+FDSTS) & (NE7_DIO|NE7_RQM))
1146 != (NE7_DIO|NE7_RQM) && j-- > 0)
1147 if (i == NE7_RQM)
1148 return fdc_err(fdcu, "ready for output in input\n");
1149 if (j <= 0)
1150 return fdc_err(fdcu, bootverbose? "input ready timeout\n": 0);
1151 #ifdef FDC_DEBUG
1152 i = inb(baseport+FDDATA);
1153 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1154 return(i);
1155 #else /* !FDC_DEBUG */
1156 return inb(baseport+FDDATA);
1157 #endif /* FDC_DEBUG */
1158 }
1159
1160 /*
1161 * fd_in: Like in_fdc, but allows you to see if it worked.
1162 */
1163 static int
1164 fd_in(fdcu_t fdcu, int *ptr)
1165 {
1166 int baseport = fdc_data[fdcu].baseport;
1167 int i, j = 100000;
1168 while ((i = inb(baseport+FDSTS) & (NE7_DIO|NE7_RQM))
1169 != (NE7_DIO|NE7_RQM) && j-- > 0)
1170 if (i == NE7_RQM)
1171 return fdc_err(fdcu, "ready for output in input\n");
1172 if (j <= 0)
1173 return fdc_err(fdcu, bootverbose? "input ready timeout\n": 0);
1174 #ifdef FDC_DEBUG
1175 i = inb(baseport+FDDATA);
1176 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1177 *ptr = i;
1178 return 0;
1179 #else /* !FDC_DEBUG */
1180 i = inb(baseport+FDDATA);
1181 if (ptr)
1182 *ptr = i;
1183 return 0;
1184 #endif /* FDC_DEBUG */
1185 }
1186
1187 int
1188 out_fdc(fdcu_t fdcu, int x)
1189 {
1190 int baseport = fdc_data[fdcu].baseport;
1191 int i;
1192
1193 /* Check that the direction bit is set */
1194 i = 100000;
1195 while ((inb(baseport+FDSTS) & NE7_DIO) && i-- > 0);
1196 if (i <= 0) return fdc_err(fdcu, "direction bit not set\n");
1197
1198 /* Check that the floppy controller is ready for a command */
1199 i = 100000;
1200 while ((inb(baseport+FDSTS) & NE7_RQM) == 0 && i-- > 0);
1201 if (i <= 0)
1202 return fdc_err(fdcu, bootverbose? "output ready timeout\n": 0);
1203
1204 /* Send the command and return */
1205 outb(baseport+FDDATA, x);
1206 TRACE1("[0x%x->FDDATA]", x);
1207 return (0);
1208 }
1209
1210 /****************************************************************************/
1211 /* fdopen/fdclose */
1212 /****************************************************************************/
1213 int
1214 Fdopen(dev_t dev, int flags, int mode, struct proc *p)
1215 {
1216 fdu_t fdu = FDUNIT(minor(dev));
1217 int type = FDTYPE(minor(dev));
1218 fdc_p fdc;
1219
1220 /* check bounds */
1221 if (fdu >= NFD)
1222 return(ENXIO);
1223 fdc = fd_data[fdu].fdc;
1224 if ((fdc == NULL) || (fd_data[fdu].type == NO_TYPE))
1225 return(ENXIO);
1226 if (type > NUMDENS)
1227 return(ENXIO);
1228 if (type == 0)
1229 type = fd_data[fdu].type;
1230 else {
1231 /*
1232 * For each type of basic drive, make sure we are trying
1233 * to open a type it can do,
1234 */
1235 if (type != fd_data[fdu].type) {
1236 switch (fd_data[fdu].type) {
1237 case FD_360:
1238 return(ENXIO);
1239 case FD_720:
1240 if ( type != FD_820
1241 && type != FD_800
1242 )
1243 return(ENXIO);
1244 break;
1245 case FD_1200:
1246 switch (type) {
1247 case FD_1480:
1248 type = FD_1480in5_25;
1249 break;
1250 case FD_1440:
1251 type = FD_1440in5_25;
1252 break;
1253 case FD_820:
1254 type = FD_820in5_25;
1255 break;
1256 case FD_800:
1257 type = FD_800in5_25;
1258 break;
1259 case FD_720:
1260 type = FD_720in5_25;
1261 break;
1262 case FD_360:
1263 type = FD_360in5_25;
1264 break;
1265 default:
1266 return(ENXIO);
1267 }
1268 break;
1269 case FD_1440:
1270 if ( type != FD_1720
1271 && type != FD_1480
1272 && type != FD_1200
1273 && type != FD_820
1274 && type != FD_800
1275 && type != FD_720
1276 )
1277 return(ENXIO);
1278 break;
1279 }
1280 }
1281 }
1282 fd_data[fdu].ft = fd_types + type - 1;
1283 fd_data[fdu].flags |= FD_OPEN;
1284
1285 return 0;
1286 }
1287
1288 int
1289 fdclose(dev_t dev, int flags, int mode, struct proc *p)
1290 {
1291 fdu_t fdu = FDUNIT(minor(dev));
1292
1293 fd_data[fdu].flags &= ~FD_OPEN;
1294 fd_data[fdu].options &= ~FDOPT_NORETRY;
1295
1296 return(0);
1297 }
1298
1299 static int
1300 fdread(dev_t dev, struct uio *uio, int ioflag)
1301 {
1302 return (physio(fdstrategy, NULL, dev, 1, minphys, uio));
1303 }
1304
1305 static int
1306 fdwrite(dev_t dev, struct uio *uio, int ioflag)
1307 {
1308 return (physio(fdstrategy, NULL, dev, 0, minphys, uio));
1309 }
1310
1311
1312 /****************************************************************************/
1313 /* fdstrategy */
1314 /****************************************************************************/
1315 void
1316 fdstrategy(struct buf *bp)
1317 {
1318 unsigned nblocks, blknum, cando;
1319 int s;
1320 fdcu_t fdcu;
1321 fdu_t fdu;
1322 fdc_p fdc;
1323 fd_p fd;
1324 size_t fdblk;
1325
1326 fdu = FDUNIT(minor(bp->b_dev));
1327 fd = &fd_data[fdu];
1328 fdc = fd->fdc;
1329 fdcu = fdc->fdcu;
1330 #ifdef FDC_YE
1331 if (fd->type == NO_TYPE) {
1332 bp->b_error = ENXIO;
1333 bp->b_flags |= B_ERROR;
1334 /*
1335 * I _refuse_ to use a goto
1336 */
1337 biodone(bp);
1338 return;
1339 };
1340 #endif
1341
1342 fdblk = 128 << (fd->ft->secsize);
1343 if (!(bp->b_flags & B_FORMAT)) {
1344 if ((fdu >= NFD) || (bp->b_blkno < 0)) {
1345 printf(
1346 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
1347 fdu, (u_long)bp->b_blkno, bp->b_bcount);
1348 bp->b_error = EINVAL;
1349 bp->b_flags |= B_ERROR;
1350 goto bad;
1351 }
1352 if ((bp->b_bcount % fdblk) != 0) {
1353 bp->b_error = EINVAL;
1354 bp->b_flags |= B_ERROR;
1355 goto bad;
1356 }
1357 }
1358
1359 /*
1360 * Set up block calculations.
1361 */
1362 if (bp->b_blkno > 20000000) {
1363 /*
1364 * Reject unreasonably high block number, prevent the
1365 * multiplication below from overflowing.
1366 */
1367 bp->b_error = EINVAL;
1368 bp->b_flags |= B_ERROR;
1369 goto bad;
1370 }
1371 blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk;
1372 nblocks = fd->ft->size;
1373 bp->b_resid = 0;
1374 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1375 if (blknum <= nblocks) {
1376 cando = (nblocks - blknum) * fdblk;
1377 bp->b_resid = bp->b_bcount - cando;
1378 if (cando == 0)
1379 goto bad; /* not actually bad but EOF */
1380 } else {
1381 bp->b_error = EINVAL;
1382 bp->b_flags |= B_ERROR;
1383 goto bad;
1384 }
1385 }
1386 bp->b_pblkno = bp->b_blkno;
1387 s = splbio();
1388 bufqdisksort(&fdc->head, bp);
1389 untimeout(fd_turnoff, (caddr_t)fdu, fd->toffhandle); /* a good idea */
1390
1391 /* Tell devstat we are starting on the transaction */
1392 devstat_start_transaction(&fd->device_stats);
1393
1394 fdstart(fdcu);
1395 splx(s);
1396 return;
1397
1398 bad:
1399 biodone(bp);
1400 }
1401
1402 /***************************************************************\
1403 * fdstart *
1404 * We have just queued something.. if the controller is not busy *
1405 * then simulate the case where it has just finished a command *
1406 * So that it (the interrupt routine) looks on the queue for more*
1407 * work to do and picks up what we just added. *
1408 * If the controller is already busy, we need do nothing, as it *
1409 * will pick up our work when the present work completes *
1410 \***************************************************************/
1411 static void
1412 fdstart(fdcu_t fdcu)
1413 {
1414 int s;
1415
1416 s = splbio();
1417 if(fdc_data[fdcu].state == DEVIDLE)
1418 {
1419 fdintr(fdcu);
1420 }
1421 splx(s);
1422 }
1423
1424 static void
1425 fd_iotimeout(void *arg1)
1426 {
1427 fdc_p fdc;
1428 fdcu_t fdcu;
1429 int s;
1430
1431 fdcu = (fdcu_t)arg1;
1432 fdc = fdc_data + fdcu;
1433 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1434
1435 /*
1436 * Due to IBM's brain-dead design, the FDC has a faked ready
1437 * signal, hardwired to ready == true. Thus, any command
1438 * issued if there's no diskette in the drive will _never_
1439 * complete, and must be aborted by resetting the FDC.
1440 * Many thanks, Big Blue!
1441 * The FDC must not be reset directly, since that would
1442 * interfere with the state machine. Instead, pretend that
1443 * the command completed but was invalid. The state machine
1444 * will reset the FDC and retry once.
1445 */
1446 s = splbio();
1447 fdc->status[0] = NE7_ST0_IC_IV;
1448 fdc->flags &= ~FDC_STAT_VALID;
1449 fdc->state = IOTIMEDOUT;
1450 fdintr(fdcu);
1451 splx(s);
1452 }
1453
1454 /* just ensure it has the right spl */
1455 static void
1456 fd_pseudointr(void *arg1)
1457 {
1458 fdcu_t fdcu = (fdcu_t)arg1;
1459 int s;
1460
1461 s = splbio();
1462 fdintr(fdcu);
1463 splx(s);
1464 }
1465
1466 /***********************************************************************\
1467 * fdintr *
1468 * keep calling the state machine until it returns a 0 *
1469 * ALWAYS called at SPLBIO *
1470 \***********************************************************************/
1471 static void
1472 fdintr(fdcu_t fdcu)
1473 {
1474 fdc_p fdc = fdc_data + fdcu;
1475 while(fdstate(fdcu, fdc))
1476 ;
1477 }
1478
1479 #ifdef FDC_YE
1480 /*
1481 * magic pseudo-DMA initialization for YE FDC. Sets count and
1482 * direction
1483 */
1484 #define SET_BCDR(wr,cnt,port) outb(port,(((cnt)-1) & 0xff)); \
1485 outb(port+1,((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)))
1486
1487 /*
1488 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1489 */
1490 static int fdcpio(fdcu_t fdcu, long flags, caddr_t addr, u_int count)
1491 {
1492 u_char *cptr = (u_char *)addr;
1493 fdc_p fdc = &fdc_data[fdcu];
1494 int io = fdc->baseport;
1495
1496 if (flags & B_READ) {
1497 if (fdc->state != PIOREAD) {
1498 fdc->state = PIOREAD;
1499 return(0);
1500 };
1501 SET_BCDR(0,count,io);
1502 insb(io+FDC_YE_DATAPORT,cptr,count);
1503 } else {
1504 outsb(io+FDC_YE_DATAPORT,cptr,count);
1505 SET_BCDR(0,count,io);
1506 };
1507 return(1);
1508 }
1509 #endif /* FDC_YE */
1510
1511 /***********************************************************************\
1512 * The controller state machine. *
1513 * if it returns a non zero value, it should be called again immediatly *
1514 \***********************************************************************/
1515 static int
1516 fdstate(fdcu_t fdcu, fdc_p fdc)
1517 {
1518 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1519 unsigned blknum = 0, b_cylinder = 0;
1520 fdu_t fdu = fdc->fdu;
1521 fd_p fd;
1522 register struct buf *bp;
1523 struct fd_formb *finfo = NULL;
1524 size_t fdblk;
1525
1526 bp = fdc->bp;
1527 if (bp == NULL) {
1528 bp = bufq_first(&fdc->head);
1529 if (bp != NULL) {
1530 bufq_remove(&fdc->head, bp);
1531 fdc->bp = bp;
1532 }
1533 }
1534 if (bp == NULL) {
1535 /***********************************************\
1536 * nothing left for this controller to do *
1537 * Force into the IDLE state, *
1538 \***********************************************/
1539 fdc->state = DEVIDLE;
1540 if(fdc->fd)
1541 {
1542 printf("fd%d: unexpected valid fd pointer\n",
1543 fdc->fdu);
1544 fdc->fd = (fd_p) 0;
1545 fdc->fdu = -1;
1546 }
1547 TRACE1("[fdc%d IDLE]", fdcu);
1548 return(0);
1549 }
1550 fdu = FDUNIT(minor(bp->b_dev));
1551 fd = fd_data + fdu;
1552 fdblk = 128 << fd->ft->secsize;
1553 if (fdc->fd && (fd != fdc->fd))
1554 {
1555 printf("fd%d: confused fd pointers\n", fdu);
1556 }
1557 read = bp->b_flags & B_READ;
1558 format = bp->b_flags & B_FORMAT;
1559 if(format) {
1560 finfo = (struct fd_formb *)bp->b_data;
1561 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1562 - (char *)finfo;
1563 }
1564 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1565 blknum = (unsigned) bp->b_pblkno * DEV_BSIZE/fdblk +
1566 fd->skip/fdblk;
1567 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1568 }
1569 TRACE1("fd%d", fdu);
1570 TRACE1("[%s]", fdstates[fdc->state]);
1571 TRACE1("(0x%x)", fd->flags);
1572 untimeout(fd_turnoff, (caddr_t)fdu, fd->toffhandle);
1573 fd->toffhandle = timeout(fd_turnoff, (caddr_t)fdu, 4 * hz);
1574 switch (fdc->state)
1575 {
1576 case DEVIDLE:
1577 case FINDWORK: /* we have found new work */
1578 fdc->retry = 0;
1579 fd->skip = 0;
1580 fdc->fd = fd;
1581 fdc->fdu = fdu;
1582 outb(fdc->baseport+FDCTL, fd->ft->trans);
1583 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1584 /*******************************************************\
1585 * If the next drive has a motor startup pending, then *
1586 * it will start up in its own good time *
1587 \*******************************************************/
1588 if(fd->flags & FD_MOTOR_WAIT)
1589 {
1590 fdc->state = MOTORWAIT;
1591 return(0); /* come back later */
1592 }
1593 /*******************************************************\
1594 * Maybe if it's not starting, it SHOULD be starting *
1595 \*******************************************************/
1596 if (!(fd->flags & FD_MOTOR))
1597 {
1598 fdc->state = MOTORWAIT;
1599 fd_turnon(fdu);
1600 return(0);
1601 }
1602 else /* at least make sure we are selected */
1603 {
1604 set_motor(fdcu, fd->fdsu, TURNON);
1605 }
1606 if (fdc->flags & FDC_NEEDS_RESET) {
1607 fdc->state = RESETCTLR;
1608 fdc->flags &= ~FDC_NEEDS_RESET;
1609 } else
1610 fdc->state = DOSEEK;
1611 break;
1612 case DOSEEK:
1613 if (b_cylinder == (unsigned)fd->track)
1614 {
1615 fdc->state = SEEKCOMPLETE;
1616 break;
1617 }
1618 if (fd_cmd(fdcu, 3, NE7CMD_SEEK,
1619 fd->fdsu, b_cylinder * fd->ft->steptrac,
1620 0))
1621 {
1622 /*
1623 * seek command not accepted, looks like
1624 * the FDC went off to the Saints...
1625 */
1626 fdc->retry = 6; /* try a reset */
1627 return(retrier(fdcu));
1628 }
1629 fd->track = FD_NO_TRACK;
1630 fdc->state = SEEKWAIT;
1631 return(0); /* will return later */
1632 case SEEKWAIT:
1633 /* allow heads to settle */
1634 timeout(fd_pseudointr, (caddr_t)fdcu, hz / 16);
1635 fdc->state = SEEKCOMPLETE;
1636 return(0); /* will return later */
1637 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1638 /* Make sure seek really happened*/
1639 if(fd->track == FD_NO_TRACK)
1640 {
1641 int descyl = b_cylinder * fd->ft->steptrac;
1642 do {
1643 /*
1644 * This might be a "ready changed" interrupt,
1645 * which cannot really happen since the
1646 * RDY pin is hardwired to + 5 volts. This
1647 * generally indicates a "bouncing" intr
1648 * line, so do one of the following:
1649 *
1650 * When running on an enhanced FDC that is
1651 * known to not go stuck after responding
1652 * with INVALID, fetch all interrupt states
1653 * until seeing either an INVALID or a
1654 * real interrupt condition.
1655 *
1656 * When running on a dumb old NE765, give
1657 * up immediately. The controller will
1658 * provide up to four dummy RC interrupt
1659 * conditions right after reset (for the
1660 * corresponding four drives), so this is
1661 * our only chance to get notice that it
1662 * was not the FDC that caused the interrupt.
1663 */
1664 if (fd_sense_int(fdc, &st0, &cyl)
1665 == FD_NOT_VALID)
1666 return 0;
1667 if(fdc->fdct == FDC_NE765
1668 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1669 return 0; /* hope for a real intr */
1670 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1671
1672 if (0 == descyl)
1673 {
1674 int failed = 0;
1675 /*
1676 * seek to cyl 0 requested; make sure we are
1677 * really there
1678 */
1679 if (fd_sense_drive_status(fdc, &st3))
1680 failed = 1;
1681 if ((st3 & NE7_ST3_T0) == 0) {
1682 printf(
1683 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1684 fdu, st3, NE7_ST3BITS);
1685 failed = 1;
1686 }
1687
1688 if (failed)
1689 {
1690 if(fdc->retry < 3)
1691 fdc->retry = 3;
1692 return(retrier(fdcu));
1693 }
1694 }
1695
1696 if (cyl != descyl)
1697 {
1698 printf(
1699 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1700 fdu, descyl, cyl, st0);
1701 if (fdc->retry < 3)
1702 fdc->retry = 3;
1703 return(retrier(fdcu));
1704 }
1705 }
1706
1707 fd->track = b_cylinder;
1708 #ifdef FDC_YE
1709 if (!(fdc->flags & FDC_PCMCIA))
1710 #endif
1711 isa_dmastart(bp->b_flags, bp->b_data+fd->skip,
1712 format ? bp->b_bcount : fdblk, fdc->dmachan);
1713 sectrac = fd->ft->sectrac;
1714 sec = blknum % (sectrac * fd->ft->heads);
1715 head = sec / sectrac;
1716 sec = sec % sectrac + 1;
1717 fd->hddrv = ((head&1)<<2)+fdu;
1718
1719 if(format || !read)
1720 {
1721 /* make sure the drive is writable */
1722 if(fd_sense_drive_status(fdc, &st3) != 0)
1723 {
1724 /* stuck controller? */
1725 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1726 format ? bp->b_bcount : fdblk,
1727 fdc->dmachan);
1728 fdc->retry = 6; /* reset the beast */
1729 return(retrier(fdcu));
1730 }
1731 if(st3 & NE7_ST3_WP)
1732 {
1733 /*
1734 * XXX YES! this is ugly.
1735 * in order to force the current operation
1736 * to fail, we will have to fake an FDC
1737 * error - all error handling is done
1738 * by the retrier()
1739 */
1740 fdc->status[0] = NE7_ST0_IC_AT;
1741 fdc->status[1] = NE7_ST1_NW;
1742 fdc->status[2] = 0;
1743 fdc->status[3] = fd->track;
1744 fdc->status[4] = head;
1745 fdc->status[5] = sec;
1746 fdc->retry = 8; /* break out immediately */
1747 fdc->state = IOTIMEDOUT; /* not really... */
1748 return (1);
1749 }
1750 }
1751
1752 if(format)
1753 {
1754 #ifdef FDC_YE
1755 if (fdc->flags & FDC_PCMCIA)
1756 (void)fdcpio(fdcu,bp->b_flags,
1757 bp->b_data+fd->skip,
1758 bp->b_bcount);
1759 #endif
1760 /* formatting */
1761 if(fd_cmd(fdcu, 6,
1762 NE7CMD_FORMAT,
1763 head << 2 | fdu,
1764 finfo->fd_formb_secshift,
1765 finfo->fd_formb_nsecs,
1766 finfo->fd_formb_gaplen,
1767 finfo->fd_formb_fillbyte,
1768 0))
1769 {
1770 /* controller fell over */
1771 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1772 format ? bp->b_bcount : fdblk,
1773 fdc->dmachan);
1774 fdc->retry = 6;
1775 return(retrier(fdcu));
1776 }
1777 }
1778 else
1779 {
1780 #ifdef FDC_YE
1781 if (fdc->flags & FDC_PCMCIA) {
1782 /*
1783 * this seems to be necessary even when
1784 * reading data
1785 */
1786 SET_BCDR(1,fdblk,fdc->baseport);
1787
1788 /*
1789 * perform the write pseudo-DMA before
1790 * the WRITE command is sent
1791 */
1792 if (!read)
1793 (void)fdcpio(fdcu,bp->b_flags,
1794 bp->b_data+fd->skip,
1795 fdblk);
1796 }
1797 #endif
1798 if (fd_cmd(fdcu, 9,
1799 (read ? NE7CMD_READ : NE7CMD_WRITE),
1800 head << 2 | fdu, /* head & unit */
1801 fd->track, /* track */
1802 head,
1803 sec, /* sector + 1 */
1804 fd->ft->secsize, /* sector size */
1805 sectrac, /* sectors/track */
1806 fd->ft->gap, /* gap size */
1807 fd->ft->datalen, /* data length */
1808 0))
1809 {
1810 /* the beast is sleeping again */
1811 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1812 format ? bp->b_bcount : fdblk,
1813 fdc->dmachan);
1814 fdc->retry = 6;
1815 return(retrier(fdcu));
1816 }
1817 }
1818 #ifdef FDC_YE
1819 if (fdc->flags & FDC_PCMCIA)
1820 /*
1821 * if this is a read, then simply await interrupt
1822 * before performing PIO
1823 */
1824 if (read && !fdcpio(fdcu,bp->b_flags,
1825 bp->b_data+fd->skip,fdblk)) {
1826 fd->tohandle = timeout(fd_iotimeout,
1827 (caddr_t)fdcu, hz);
1828 return(0); /* will return later */
1829 };
1830
1831 /*
1832 * write (or format) operation will fall through and
1833 * await completion interrupt
1834 */
1835 #endif
1836 fdc->state = IOCOMPLETE;
1837 fd->tohandle = timeout(fd_iotimeout, (caddr_t)fdcu, hz);
1838 return(0); /* will return later */
1839 #ifdef FDC_YE
1840 case PIOREAD:
1841 /*
1842 * actually perform the PIO read. The IOCOMPLETE case
1843 * removes the timeout for us.
1844 */
1845 (void)fdcpio(fdcu,bp->b_flags,bp->b_data+fd->skip,fdblk);
1846 fdc->state = IOCOMPLETE;
1847 /* FALLTHROUGH */
1848 #endif
1849 case IOCOMPLETE: /* IO DONE, post-analyze */
1850 untimeout(fd_iotimeout, (caddr_t)fdcu, fd->tohandle);
1851
1852 if (fd_read_status(fdc, fd->fdsu))
1853 {
1854 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1855 format ? bp->b_bcount : fdblk,
1856 fdc->dmachan);
1857 if (fdc->retry < 6)
1858 fdc->retry = 6; /* force a reset */
1859 return retrier(fdcu);
1860 }
1861
1862 fdc->state = IOTIMEDOUT;
1863
1864 /* FALLTHROUGH */
1865
1866 case IOTIMEDOUT:
1867 #ifdef FDC_YE
1868 if (!(fdc->flags & FDC_PCMCIA))
1869 #endif
1870 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1871 format ? bp->b_bcount : fdblk, fdc->dmachan);
1872 if (fdc->status[0] & NE7_ST0_IC)
1873 {
1874 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1875 && fdc->status[1] & NE7_ST1_OR) {
1876 /*
1877 * DMA overrun. Someone hogged the bus
1878 * and didn't release it in time for the
1879 * next FDC transfer.
1880 * Just restart it, don't increment retry
1881 * count. (vak)
1882 */
1883 fdc->state = SEEKCOMPLETE;
1884 return (1);
1885 }
1886 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
1887 && fdc->retry < 6)
1888 fdc->retry = 6; /* force a reset */
1889 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1890 && fdc->status[2] & NE7_ST2_WC
1891 && fdc->retry < 3)
1892 fdc->retry = 3; /* force recalibrate */
1893 return(retrier(fdcu));
1894 }
1895 /* All OK */
1896 fd->skip += fdblk;
1897 if (!format && fd->skip < bp->b_bcount - bp->b_resid)
1898 {
1899 /* set up next transfer */
1900 fdc->state = DOSEEK;
1901 }
1902 else
1903 {
1904 /* ALL DONE */
1905 fd->skip = 0;
1906 fdc->bp = NULL;
1907 /* Tell devstat we have finished with the transaction */
1908 devstat_end_transaction(&fd->device_stats,
1909 bp->b_bcount - bp->b_resid,
1910 DEVSTAT_TAG_NONE,
1911 (bp->b_flags & B_READ) ?
1912 DEVSTAT_READ : DEVSTAT_WRITE);
1913 biodone(bp);
1914 fdc->fd = (fd_p) 0;
1915 fdc->fdu = -1;
1916 fdc->state = FINDWORK;
1917 }
1918 return(1);
1919 case RESETCTLR:
1920 fdc_reset(fdc);
1921 fdc->retry++;
1922 fdc->state = RESETCOMPLETE;
1923 return (0);
1924 case RESETCOMPLETE:
1925 /*
1926 * Discard all the results from the reset so that they
1927 * can't cause an unexpected interrupt later.
1928 */
1929 for (i = 0; i < 4; i++)
1930 (void)fd_sense_int(fdc, &st0, &cyl);
1931 fdc->state = STARTRECAL;
1932 /* Fall through. */
1933 case STARTRECAL:
1934 if(fd_cmd(fdcu,
1935 2, NE7CMD_RECAL, fdu,
1936 0)) /* Recalibrate Function */
1937 {
1938 /* arrgl */
1939 fdc->retry = 6;
1940 return(retrier(fdcu));
1941 }
1942 fdc->state = RECALWAIT;
1943 return(0); /* will return later */
1944 case RECALWAIT:
1945 /* allow heads to settle */
1946 timeout(fd_pseudointr, (caddr_t)fdcu, hz / 8);
1947 fdc->state = RECALCOMPLETE;
1948 return(0); /* will return later */
1949 case RECALCOMPLETE:
1950 do {
1951 /*
1952 * See SEEKCOMPLETE for a comment on this:
1953 */
1954 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1955 return 0;
1956 if(fdc->fdct == FDC_NE765
1957 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1958 return 0; /* hope for a real intr */
1959 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1960 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
1961 {
1962 if(fdc->retry > 3)
1963 /*
1964 * a recalibrate from beyond cylinder 77
1965 * will "fail" due to the FDC limitations;
1966 * since people used to complain much about
1967 * the failure message, try not logging
1968 * this one if it seems to be the first
1969 * time in a line
1970 */
1971 printf("fd%d: recal failed ST0 %b cyl %d\n",
1972 fdu, st0, NE7_ST0BITS, cyl);
1973 if(fdc->retry < 3) fdc->retry = 3;
1974 return(retrier(fdcu));
1975 }
1976 fd->track = 0;
1977 /* Seek (probably) necessary */
1978 fdc->state = DOSEEK;
1979 return(1); /* will return immediatly */
1980 case MOTORWAIT:
1981 if(fd->flags & FD_MOTOR_WAIT)
1982 {
1983 return(0); /* time's not up yet */
1984 }
1985 if (fdc->flags & FDC_NEEDS_RESET) {
1986 fdc->state = RESETCTLR;
1987 fdc->flags &= ~FDC_NEEDS_RESET;
1988 } else {
1989 /*
1990 * If all motors were off, then the controller was
1991 * reset, so it has lost track of the current
1992 * cylinder. Recalibrate to handle this case.
1993 * But first, discard the results of the reset.
1994 */
1995 fdc->state = RESETCOMPLETE;
1996 }
1997 return(1); /* will return immediatly */
1998 default:
1999 printf("fdc%d: Unexpected FD int->", fdcu);
2000 if (fd_read_status(fdc, fd->fdsu) == 0)
2001 printf("FDC status :%x %x %x %x %x %x %x ",
2002 fdc->status[0],
2003 fdc->status[1],
2004 fdc->status[2],
2005 fdc->status[3],
2006 fdc->status[4],
2007 fdc->status[5],
2008 fdc->status[6] );
2009 else
2010 printf("No status available ");
2011 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2012 {
2013 printf("[controller is dead now]\n");
2014 return(0);
2015 }
2016 printf("ST0 = %x, PCN = %x\n", st0, cyl);
2017 return(0);
2018 }
2019 /*XXX confusing: some branches return immediately, others end up here*/
2020 return(1); /* Come back immediatly to new state */
2021 }
2022
2023 static int
2024 retrier(fdcu)
2025 fdcu_t fdcu;
2026 {
2027 fdc_p fdc = fdc_data + fdcu;
2028 register struct buf *bp;
2029
2030 bp = fdc->bp;
2031
2032 if(fd_data[FDUNIT(minor(bp->b_dev))].options & FDOPT_NORETRY)
2033 goto fail;
2034 switch(fdc->retry)
2035 {
2036 case 0: case 1: case 2:
2037 fdc->state = SEEKCOMPLETE;
2038 break;
2039 case 3: case 4: case 5:
2040 fdc->state = STARTRECAL;
2041 break;
2042 case 6:
2043 fdc->state = RESETCTLR;
2044 break;
2045 case 7:
2046 break;
2047 default:
2048 fail:
2049 {
2050 dev_t sav_b_dev = bp->b_dev;
2051 /* Trick diskerr */
2052 bp->b_dev = makedev(major(bp->b_dev),
2053 (FDUNIT(minor(bp->b_dev))<<3)|RAW_PART);
2054 diskerr(bp, "fd", "hard error", LOG_PRINTF,
2055 fdc->fd->skip / DEV_BSIZE,
2056 (struct disklabel *)NULL);
2057 bp->b_dev = sav_b_dev;
2058 if (fdc->flags & FDC_STAT_VALID)
2059 {
2060 printf(
2061 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2062 fdc->status[0], NE7_ST0BITS,
2063 fdc->status[1], NE7_ST1BITS,
2064 fdc->status[2], NE7_ST2BITS,
2065 fdc->status[3], fdc->status[4],
2066 fdc->status[5]);
2067 }
2068 else
2069 printf(" (No status)\n");
2070 }
2071 bp->b_flags |= B_ERROR;
2072 bp->b_error = EIO;
2073 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2074 fdc->bp = NULL;
2075
2076 /* Tell devstat we have finished with the transaction */
2077 devstat_end_transaction(&fdc->fd->device_stats,
2078 bp->b_bcount - bp->b_resid,
2079 DEVSTAT_TAG_NONE,
2080 (bp->b_flags & B_READ) ? DEVSTAT_READ :
2081 DEVSTAT_WRITE);
2082 fdc->fd->skip = 0;
2083 biodone(bp);
2084 fdc->state = FINDWORK;
2085 fdc->flags |= FDC_NEEDS_RESET;
2086 fdc->fd = (fd_p) 0;
2087 fdc->fdu = -1;
2088 return(1);
2089 }
2090 fdc->retry++;
2091 return(1);
2092 }
2093
2094 static int
2095 fdformat(dev, finfo, p)
2096 dev_t dev;
2097 struct fd_formb *finfo;
2098 struct proc *p;
2099 {
2100 fdu_t fdu;
2101 fd_p fd;
2102
2103 struct buf *bp;
2104 int rv = 0, s;
2105 size_t fdblk;
2106
2107 fdu = FDUNIT(minor(dev));
2108 fd = &fd_data[fdu];
2109 fdblk = 128 << fd->ft->secsize;
2110
2111 /* set up a buffer header for fdstrategy() */
2112 bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT);
2113 if(bp == 0)
2114 return ENOBUFS;
2115 /*
2116 * keep the process from being swapped
2117 */
2118 p->p_flag |= P_PHYSIO;
2119 bzero((void *)bp, sizeof(struct buf));
2120 bp->b_flags = B_BUSY | B_PHYS | B_FORMAT;
2121 bp->b_proc = p;
2122
2123 /*
2124 * calculate a fake blkno, so fdstrategy() would initiate a
2125 * seek to the requested cylinder
2126 */
2127 bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
2128 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
2129
2130 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2131 bp->b_data = (caddr_t)finfo;
2132
2133 /* now do the format */
2134 bp->b_dev = dev;
2135 fdstrategy(bp);
2136
2137 /* ...and wait for it to complete */
2138 s = splbio();
2139 while(!(bp->b_flags & B_DONE))
2140 {
2141 rv = tsleep((caddr_t)bp, PRIBIO, "fdform", 20 * hz);
2142 if(rv == EWOULDBLOCK)
2143 break;
2144 }
2145 splx(s);
2146
2147 if(rv == EWOULDBLOCK) {
2148 /* timed out */
2149 rv = EIO;
2150 biodone(bp);
2151 }
2152 if(bp->b_flags & B_ERROR)
2153 rv = bp->b_error;
2154 /*
2155 * allow the process to be swapped
2156 */
2157 p->p_flag &= ~P_PHYSIO;
2158 free(bp, M_TEMP);
2159 return rv;
2160 }
2161
2162 /*
2163 * TODO: don't allocate buffer on stack.
2164 */
2165
2166 static int
2167 fdioctl(dev, cmd, addr, flag, p)
2168 dev_t dev;
2169 u_long cmd;
2170 caddr_t addr;
2171 int flag;
2172 struct proc *p;
2173 {
2174 fdu_t fdu = FDUNIT(minor(dev));
2175 fd_p fd = &fd_data[fdu];
2176 size_t fdblk;
2177
2178 struct fd_type *fdt;
2179 struct disklabel *dl;
2180 char buffer[DEV_BSIZE];
2181 int error = 0;
2182
2183 fdblk = 128 << fd->ft->secsize;
2184
2185 switch (cmd)
2186 {
2187 case DIOCGDINFO:
2188 bzero(buffer, sizeof (buffer));
2189 dl = (struct disklabel *)buffer;
2190 dl->d_secsize = fdblk;
2191 fdt = fd_data[FDUNIT(minor(dev))].ft;
2192 dl->d_secpercyl = fdt->size / fdt->tracks;
2193 dl->d_type = DTYPE_FLOPPY;
2194
2195 if (readdisklabel(dkmodpart(dev, RAW_PART), fdstrategy, dl)
2196 == NULL)
2197 error = 0;
2198 else
2199 error = EINVAL;
2200
2201 *(struct disklabel *)addr = *dl;
2202 break;
2203
2204 case DIOCSDINFO:
2205 if ((flag & FWRITE) == 0)
2206 error = EBADF;
2207 break;
2208
2209 case DIOCWLABEL:
2210 if ((flag & FWRITE) == 0)
2211 error = EBADF;
2212 break;
2213
2214 case DIOCWDINFO:
2215 if ((flag & FWRITE) == 0)
2216 {
2217 error = EBADF;
2218 break;
2219 }
2220
2221 dl = (struct disklabel *)addr;
2222
2223 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2224 (u_long)0)) != 0)
2225 break;
2226
2227 error = writedisklabel(dev, fdstrategy,
2228 (struct disklabel *)buffer);
2229 break;
2230 case FD_FORM:
2231 if((flag & FWRITE) == 0)
2232 error = EBADF; /* must be opened for writing */
2233 else if(((struct fd_formb *)addr)->format_version !=
2234 FD_FORMAT_VERSION)
2235 error = EINVAL; /* wrong version of formatting prog */
2236 else
2237 error = fdformat(dev, (struct fd_formb *)addr, p);
2238 break;
2239
2240 case FD_GTYPE: /* get drive type */
2241 *(struct fd_type *)addr = *fd->ft;
2242 break;
2243
2244 case FD_STYPE: /* set drive type */
2245 /* this is considered harmful; only allow for superuser */
2246 if(suser(p->p_ucred, &p->p_acflag) != 0)
2247 return EPERM;
2248 *fd->ft = *(struct fd_type *)addr;
2249 break;
2250
2251 case FD_GOPTS: /* get drive options */
2252 *(int *)addr = fd->options;
2253 break;
2254
2255 case FD_SOPTS: /* set drive options */
2256 fd->options = *(int *)addr;
2257 break;
2258
2259 default:
2260 error = ENOTTY;
2261 break;
2262 }
2263 return (error);
2264 }
2265
2266
2267 static fd_devsw_installed = 0;
2268
2269 static void fd_drvinit(void *notused )
2270 {
2271
2272 if( ! fd_devsw_installed ) {
2273 cdevsw_add_generic(BDEV_MAJOR,CDEV_MAJOR, &fd_cdevsw);
2274 fd_devsw_installed = 1;
2275 }
2276 }
2277
2278 SYSINIT(fddev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,fd_drvinit,NULL)
2279
2280
2281 #endif
2282
2283 /*
2284 * Hello emacs, these are the
2285 * Local Variables:
2286 * c-indent-level: 8
2287 * c-continued-statement-offset: 8
2288 * c-continued-brace-offset: 0
2289 * c-brace-offset: -8
2290 * c-brace-imaginary-offset: 0
2291 * c-argdecl-indent: 8
2292 * c-label-offset: -8
2293 * c++-hanging-braces: 1
2294 * c++-access-specifier-offset: -8
2295 * c++-empty-arglist-indent: 8
2296 * c++-friend-offset: 0
2297 * End:
2298 */
Cache object: c06de0a05c1335572bcefe0571a205de
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