1 /* $NetBSD: fd.c,v 1.52 2023/08/29 21:55:11 andvar Exp $ */
2 /* $OpenBSD: fd.c,v 1.6 1998/10/03 21:18:57 millert Exp $ */
3 /* NetBSD: fd.c,v 1.78 1995/07/04 07:23:09 mycroft Exp */
4
5 /*-
6 * Copyright (c) 1998 The NetBSD Foundation, Inc.
7 * All rights reserved.
8 *
9 * This code is derived from software contributed to The NetBSD Foundation
10 * by Charles M. Hannum.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 /*-
35 * Copyright (c) 1990 The Regents of the University of California.
36 * All rights reserved.
37 *
38 * This code is derived from software contributed to Berkeley by
39 * Don Ahn.
40 *
41 * Redistribution and use in source and binary forms, with or without
42 * modification, are permitted provided that the following conditions
43 * are met:
44 * 1. Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * 2. Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in the
48 * documentation and/or other materials provided with the distribution.
49 * 3. Neither the name of the University nor the names of its contributors
50 * may be used to endorse or promote products derived from this software
51 * without specific prior written permission.
52 *
53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
63 * SUCH DAMAGE.
64 *
65 * @(#)fd.c 7.4 (Berkeley) 5/25/91
66 */
67
68 #include <sys/cdefs.h>
69 __KERNEL_RCSID(0, "$NetBSD: fd.c,v 1.52 2023/08/29 21:55:11 andvar Exp $");
70
71 #include <sys/param.h>
72 #include <sys/systm.h>
73 #include <sys/callout.h>
74 #include <sys/kernel.h>
75 #include <sys/conf.h>
76 #include <sys/file.h>
77 #include <sys/ioctl.h>
78 #include <sys/device.h>
79 #include <sys/disklabel.h>
80 #include <sys/disk.h>
81 #include <sys/buf.h>
82 #include <sys/bufq.h>
83 #include <sys/uio.h>
84 #include <sys/syslog.h>
85 #include <sys/queue.h>
86
87 #include <uvm/uvm_extern.h>
88
89 #include <dev/cons.h>
90
91 #include <sys/bus.h>
92 #include <machine/cpu.h>
93
94 #include <arc/jazz/fdreg.h>
95 #include <arc/jazz/fdcvar.h>
96
97 #include "ioconf.h"
98 #include "locators.h"
99
100 #define FDUNIT(dev) DISKUNIT(dev)
101 #define FDTYPE(dev) DISKPART(dev)
102
103 /* controller driver configuration */
104 static int fdprint(void *, const char *);
105
106 /*
107 * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how
108 * we tell them apart.
109 */
110 struct fd_type {
111 int sectrac; /* sectors per track */
112 int heads; /* number of heads */
113 int seccyl; /* sectors per cylinder */
114 int secsize; /* size code for sectors */
115 int datalen; /* data len when secsize = 0 */
116 int steprate; /* step rate and head unload time */
117 int gap1; /* gap len between sectors */
118 int gap2; /* formatting gap */
119 int cyls; /* total num of cylinders */
120 int size; /* size of disk in sectors */
121 int step; /* steps per cylinder */
122 int rate; /* transfer speed code */
123 const char *name;
124 };
125
126 /* The order of entries in the following table is important -- BEWARE! */
127 const static struct fd_type fd_types[] = {
128 /* 1.44MB diskette */
129 { 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,"1.44MB" },
130 /* 1.2 MB AT-diskettes */
131 { 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS, "1.2MB" },
132 /* 360kB in 1.2MB drive */
133 { 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS, "360KB/AT" },
134 /* 360kB PC diskettes */
135 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS, "360KB/PC" },
136 /* 3.5" 720kB diskette */
137 { 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS, "720KB" },
138 /* 720kB in 1.2MB drive */
139 { 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS, "720KB/x" },
140 /* 360kB in 720kB drive */
141 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS, "360KB/x" },
142 };
143
144 /* software state, per disk (with up to 4 disks per ctlr) */
145 struct fd_softc {
146 device_t sc_dev;
147 struct disk sc_dk;
148
149 const struct fd_type *sc_deftype; /* default type descriptor */
150 struct fd_type *sc_type; /* current type descriptor */
151 struct fd_type sc_type_copy; /* copy for fiddling when formatting */
152
153 struct callout sc_motoron_ch;
154 struct callout sc_motoroff_ch;
155
156 daddr_t sc_blkno; /* starting block number */
157 int sc_bcount; /* byte count left */
158 int sc_opts; /* user-set options */
159 int sc_skip; /* bytes already transferred */
160 int sc_nblks; /* number of blocks currently transferring */
161 int sc_nbytes; /* number of bytes currently transferring */
162
163 int sc_drive; /* physical unit number */
164 int sc_flags;
165 #define FD_OPEN 0x01 /* it's open */
166 #define FD_MOTOR 0x02 /* motor should be on */
167 #define FD_MOTOR_WAIT 0x04 /* motor coming up */
168 int sc_cylin; /* where we think the head is */
169
170 TAILQ_ENTRY(fd_softc) sc_drivechain;
171 int sc_ops; /* I/O ops since last switch */
172 struct bufq_state *sc_q;/* pending I/O requests */
173 int sc_active; /* number of active I/O operations */
174 };
175
176 /* floppy driver configuration */
177 static int fdprobe(device_t, cfdata_t, void *);
178 static void fdattach(device_t, device_t, void *);
179
180 CFATTACH_DECL_NEW(fd, sizeof(struct fd_softc), fdprobe, fdattach, NULL, NULL);
181
182 dev_type_open(fdopen);
183 dev_type_close(fdclose);
184 dev_type_read(fdread);
185 dev_type_write(fdwrite);
186 dev_type_ioctl(fdioctl);
187 dev_type_strategy(fdstrategy);
188
189 const struct bdevsw fd_bdevsw = {
190 .d_open = fdopen,
191 .d_close = fdclose,
192 .d_strategy = fdstrategy,
193 .d_ioctl = fdioctl,
194 .d_dump = nodump,
195 .d_psize = nosize,
196 .d_discard = nodiscard,
197 .d_flag = D_DISK
198 };
199
200 const struct cdevsw fd_cdevsw = {
201 .d_open = fdopen,
202 .d_close = fdclose,
203 .d_read = fdread,
204 .d_write = fdwrite,
205 .d_ioctl = fdioctl,
206 .d_stop = nostop,
207 .d_tty = notty,
208 .d_poll = nopoll,
209 .d_mmap = nommap,
210 .d_kqfilter = nokqfilter,
211 .d_discard = nodiscard,
212 .d_flag = D_DISK
213 };
214
215 static void fdstart(struct fd_softc *);
216
217 struct dkdriver fddkdriver = {
218 .d_strategy = fdstrategy
219 };
220
221 static bool fd_shutdown(device_t, int);
222 #if 0
223 static const struct fd_type *fd_nvtotype(char *, int, int);
224 #endif
225 static void fd_set_motor(struct fdc_softc *, int);
226 static void fd_motor_off(void *);
227 static void fd_motor_on(void *);
228 static int fdcresult(struct fdc_softc *);
229 static void fdcstart(struct fdc_softc *);
230 static void fdcstatus(device_t, int, const char *);
231 static void fdctimeout(void *);
232 static void fdcpseudointr(void *);
233 static void fdcretry(struct fdc_softc *);
234 static void fdfinish(struct fd_softc *, struct buf *);
235 static const struct fd_type *fd_dev_to_type(struct fd_softc *, dev_t);
236 static void fd_mountroot_hook(device_t);
237
238 /*
239 * Arguments passed between fdcattach and fdprobe.
240 */
241 struct fdc_attach_args {
242 int fa_drive;
243 const struct fd_type *fa_deftype;
244 };
245
246 /*
247 * Print the location of a disk drive (called just before attaching the
248 * the drive). If `fdc' is not NULL, the drive was found but was not
249 * in the system config file; print the drive name as well.
250 * Return QUIET (config_find ignores this if the device was configured) to
251 * avoid printing `fdN not configured' messages.
252 */
253 static int
fdprint(void * aux,const char * fdc)254 fdprint(void *aux, const char *fdc)
255 {
256 struct fdc_attach_args *fa = aux;
257
258 if (fdc == NULL)
259 aprint_normal(" drive %d", fa->fa_drive);
260 return QUIET;
261 }
262
263 void
fdcattach(struct fdc_softc * fdc)264 fdcattach(struct fdc_softc *fdc)
265 {
266 struct fdc_attach_args fa;
267 int type;
268
269 callout_init(&fdc->sc_timo_ch, 0);
270 callout_init(&fdc->sc_intr_ch, 0);
271
272 fdc->sc_state = DEVIDLE;
273 TAILQ_INIT(&fdc->sc_drives);
274
275 /*
276 * No way yet to determine default disk types.
277 * we assume 1.44 3.5" type for the moment.
278 */
279 type = 0;
280
281 /* physical limit: two drives per controller. */
282 for (fa.fa_drive = 0; fa.fa_drive < 2; fa.fa_drive++) {
283 fa.fa_deftype = &fd_types[type];
284 (void)config_found(fdc->sc_dev, (void *)&fa, fdprint,
285 CFARGS_NONE);
286 }
287 }
288
289 static int
fdprobe(device_t parent,cfdata_t cf,void * aux)290 fdprobe(device_t parent, cfdata_t cf , void *aux)
291 {
292 struct fdc_softc *fdc = device_private(parent);
293 struct fdc_attach_args *fa = aux;
294 int drive = fa->fa_drive;
295 bus_space_tag_t iot = fdc->sc_iot;
296 bus_space_handle_t ioh = fdc->sc_ioh;
297 int n;
298
299 if (cf->cf_loc[FDCCF_DRIVE] != FDCCF_DRIVE_DEFAULT &&
300 cf->cf_loc[FDCCF_DRIVE] != drive)
301 return 0;
302
303 /* select drive and turn on motor */
304 bus_space_write_1(iot, ioh, FDOUT, drive | FDO_FRST | FDO_MOEN(drive));
305 /* wait for motor to spin up */
306 delay(250000);
307 out_fdc(iot, ioh, NE7CMD_RECAL);
308 out_fdc(iot, ioh, drive);
309 /* wait for recalibrate */
310 delay(2000000);
311 out_fdc(iot, ioh, NE7CMD_SENSEI);
312 n = fdcresult(fdc);
313 #ifdef FD_DEBUG
314 {
315 int i;
316 aprint_debug("%s: status", __func__);
317 for (i = 0; i < n; i++)
318 aprint_debug(" %x", fdc->sc_status[i]);
319 aprint_debug("\n");
320 }
321 #endif
322 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20)
323 return 0;
324 /* turn off motor */
325 bus_space_write_1(iot, ioh, FDOUT, FDO_FRST);
326
327 return 1;
328 }
329
330 /*
331 * Controller is working, and drive responded. Attach it.
332 */
333 void
fdattach(device_t parent,device_t self,void * aux)334 fdattach(device_t parent, device_t self, void *aux)
335 {
336 struct fdc_softc *fdc = device_private(parent);
337 struct fd_softc *fd = device_private(self);
338 struct fdc_attach_args *fa = aux;
339 const struct fd_type *type = fa->fa_deftype;
340 int drive = fa->fa_drive;
341
342 fd->sc_dev = self;
343
344 callout_init(&fd->sc_motoron_ch, 0);
345 callout_init(&fd->sc_motoroff_ch, 0);
346
347 /* XXX Allow `flags' to override device type? */
348
349 if (type)
350 printf(": %s, %d cyl, %d head, %d sec\n", type->name,
351 type->cyls, type->heads, type->sectrac);
352 else
353 printf(": density unknown\n");
354
355 bufq_alloc(&fd->sc_q, "disksort", BUFQ_SORT_CYLINDER);
356 fd->sc_cylin = -1;
357 fd->sc_drive = drive;
358 fd->sc_deftype = type;
359 fdc->sc_fd[drive] = fd;
360
361 /*
362 * Initialize and attach the disk structure.
363 */
364 disk_init(&fd->sc_dk, device_xname(fd->sc_dev), &fddkdriver);
365 disk_attach(&fd->sc_dk);
366
367 /* Establish a mountroot hook. */
368 mountroothook_establish(fd_mountroot_hook, fd->sc_dev);
369
370 /* Needed to power off if the motor is on when we halt. */
371 if (!pmf_device_register1(self, NULL, NULL, fd_shutdown))
372 aprint_error_dev(self, "couldn't establish power handler\n");
373 }
374
375 bool
fd_shutdown(device_t self,int howto)376 fd_shutdown(device_t self, int howto)
377 {
378 struct fd_softc *fd;
379
380 fd = device_private(self);
381 fd_motor_off(fd);
382
383 return true;
384 }
385
386 #if 0
387 /*
388 * Translate nvram type into internal data structure. Return NULL for
389 * none/unknown/unusable.
390 */
391 static const struct fd_type *
392 fd_nvtotype(char *fdc, int nvraminfo, int drive)
393 {
394 int type;
395
396 type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0;
397 #if 0
398 switch (type) {
399 case NVRAM_DISKETTE_NONE:
400 return NULL;
401 case NVRAM_DISKETTE_12M:
402 return &fd_types[1];
403 case NVRAM_DISKETTE_TYPE5:
404 case NVRAM_DISKETTE_TYPE6:
405 /* XXX We really ought to handle 2.88MB format. */
406 case NVRAM_DISKETTE_144M:
407 return &fd_types[0];
408 case NVRAM_DISKETTE_360K:
409 return &fd_types[3];
410 case NVRAM_DISKETTE_720K:
411 return &fd_types[4];
412 default:
413 printf("%s: drive %d: unknown device type 0x%x\n",
414 fdc, drive, type);
415 return NULL;
416 }
417 #else
418 return &fd_types[0]; /* Use only 1.44 for now */
419 #endif
420 }
421 #endif
422
423 static const struct fd_type *
fd_dev_to_type(struct fd_softc * fd,dev_t dev)424 fd_dev_to_type(struct fd_softc *fd, dev_t dev)
425 {
426 int type = FDTYPE(dev);
427
428 if (type > __arraycount(fd_types))
429 return NULL;
430 return type ? &fd_types[type - 1] : fd->sc_deftype;
431 }
432
433 void
fdstrategy(struct buf * bp)434 fdstrategy(struct buf *bp)
435 {
436 struct fd_softc *fd = device_lookup_private(&fd_cd, FDUNIT(bp->b_dev));
437 int sz;
438 int s;
439
440 /* Valid unit, controller, and request? */
441 if (bp->b_blkno < 0 ||
442 (bp->b_bcount % FDC_BSIZE) != 0) {
443 bp->b_error = EINVAL;
444 goto done;
445 }
446
447 /* If it's a null transfer, return immediately. */
448 if (bp->b_bcount == 0)
449 goto done;
450
451 sz = howmany(bp->b_bcount, FDC_BSIZE);
452
453 if (bp->b_blkno + sz > fd->sc_type->size) {
454 sz = fd->sc_type->size - bp->b_blkno;
455 if (sz == 0) {
456 /* If exactly at end of disk, return EOF. */
457 goto done;
458 }
459 if (sz < 0) {
460 /* If past end of disk, return EINVAL. */
461 bp->b_error = EINVAL;
462 goto done;
463 }
464 /* Otherwise, truncate request. */
465 bp->b_bcount = sz << DEV_BSHIFT;
466 }
467
468 bp->b_rawblkno = bp->b_blkno;
469 bp->b_cylinder =
470 bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl;
471
472 #ifdef FD_DEBUG
473 printf("%s: b_blkno %" PRId64 " b_bcount %d blkno %" PRId64
474 " cylin %d sz %d\n", __func__,
475 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylinder, sz);
476 #endif
477
478 /* Queue transfer on drive, activate drive and controller if idle. */
479 s = splbio();
480 bufq_put(fd->sc_q, bp);
481 callout_stop(&fd->sc_motoroff_ch); /* a good idea */
482 if (fd->sc_active == 0)
483 fdstart(fd);
484 #ifdef DIAGNOSTIC
485 else {
486 struct fdc_softc *fdc =
487 device_private(device_parent(fd->sc_dev));
488 if (fdc->sc_state == DEVIDLE) {
489 printf("%s: controller inactive\n", __func__);
490 fdcstart(fdc);
491 }
492 }
493 #endif
494 splx(s);
495 return;
496
497 done:
498 /* Toss transfer; we're done early. */
499 bp->b_resid = bp->b_bcount;
500 biodone(bp);
501 }
502
503 void
fdstart(struct fd_softc * fd)504 fdstart(struct fd_softc *fd)
505 {
506 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev));
507 int active = TAILQ_FIRST(&fdc->sc_drives) != 0;
508
509 /* Link into controller queue. */
510 fd->sc_active = 1;
511 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain);
512
513 /* If controller not already active, start it. */
514 if (!active)
515 fdcstart(fdc);
516 }
517
518 void
fdfinish(struct fd_softc * fd,struct buf * bp)519 fdfinish(struct fd_softc *fd, struct buf *bp)
520 {
521 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev));
522
523 /*
524 * Move this drive to the end of the queue to give others a `fair'
525 * chance. We only force a switch if N operations are completed while
526 * another drive is waiting to be serviced, since there is a long motor
527 * startup delay whenever we switch.
528 */
529 (void)bufq_get(fd->sc_q);
530 if (TAILQ_NEXT(fd, sc_drivechain) && ++fd->sc_ops >= 8) {
531 fd->sc_ops = 0;
532 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain);
533 if (bufq_peek(fd->sc_q) != NULL)
534 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain);
535 else
536 fd->sc_active = 0;
537 }
538 bp->b_resid = fd->sc_bcount;
539 fd->sc_skip = 0;
540 biodone(bp);
541 /* turn off motor 5s from now */
542 callout_reset(&fd->sc_motoroff_ch, 5 * hz, fd_motor_off, fd);
543 fdc->sc_state = DEVIDLE;
544 }
545
546 int
fdread(dev_t dev,struct uio * uio,int flags)547 fdread(dev_t dev, struct uio *uio, int flags)
548 {
549
550 return physio(fdstrategy, NULL, dev, B_READ, minphys, uio);
551 }
552
553 int
fdwrite(dev_t dev,struct uio * uio,int flags)554 fdwrite(dev_t dev, struct uio *uio, int flags)
555 {
556
557 return physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio);
558 }
559
560 void
fd_set_motor(struct fdc_softc * fdc,int reset)561 fd_set_motor(struct fdc_softc *fdc, int reset)
562 {
563 struct fd_softc *fd;
564 u_char status;
565 int n;
566
567 if ((fd = TAILQ_FIRST(&fdc->sc_drives)) != NULL)
568 status = fd->sc_drive;
569 else
570 status = 0;
571 if (!reset)
572 status |= FDO_FRST | FDO_FDMAEN;
573 for (n = 0; n < 4; n++)
574 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR))
575 status |= FDO_MOEN(n);
576 bus_space_write_1(fdc->sc_iot, fdc->sc_ioh, FDOUT, status);
577 }
578
579 void
fd_motor_off(void * arg)580 fd_motor_off(void *arg)
581 {
582 struct fd_softc *fd = arg;
583 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev));
584 int s;
585
586 s = splbio();
587 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT);
588 fd_set_motor(fdc, 0);
589 splx(s);
590 }
591
592 void
fd_motor_on(void * arg)593 fd_motor_on(void *arg)
594 {
595 struct fd_softc *fd = arg;
596 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev));
597 int s;
598
599 s = splbio();
600 fd->sc_flags &= ~FD_MOTOR_WAIT;
601 if ((TAILQ_FIRST(&fdc->sc_drives) == fd) &&
602 (fdc->sc_state == MOTORWAIT))
603 (void)fdcintr(fdc);
604 splx(s);
605 }
606
607 int
fdcresult(struct fdc_softc * fdc)608 fdcresult(struct fdc_softc *fdc)
609 {
610 bus_space_tag_t iot = fdc->sc_iot;
611 bus_space_handle_t ioh = fdc->sc_ioh;
612 u_char i;
613 int j, n = 0;
614
615 for (j = 100000; j; j--) {
616 i = bus_space_read_1(iot, ioh, FDSTS) &
617 (NE7_DIO | NE7_RQM | NE7_CB);
618 if (i == NE7_RQM)
619 return n;
620 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) {
621 if (n >= sizeof(fdc->sc_status)) {
622 log(LOG_ERR, "%s: overrun\n", __func__);
623 return -1;
624 }
625 fdc->sc_status[n++] =
626 bus_space_read_1(iot, ioh, FDDATA);
627 }
628 delay(10);
629 }
630 log(LOG_ERR, "%s: timeout\n", __func__);
631 return -1;
632 }
633
634 int
out_fdc(bus_space_tag_t iot,bus_space_handle_t ioh,uint8_t x)635 out_fdc(bus_space_tag_t iot, bus_space_handle_t ioh, uint8_t x)
636 {
637 int i = 100000;
638
639 while ((bus_space_read_1(iot, ioh, FDSTS) & NE7_DIO) && i-- > 0);
640 if (i <= 0)
641 return -1;
642 while ((bus_space_read_1(iot, ioh, FDSTS) & NE7_RQM) == 0 && i-- > 0);
643 if (i <= 0)
644 return -1;
645 bus_space_write_1(iot, ioh, FDDATA, x);
646 return 0;
647 }
648
649 int
fdopen(dev_t dev,int flags,int mode,struct lwp * l)650 fdopen(dev_t dev, int flags, int mode, struct lwp *l)
651 {
652 struct fd_softc *fd;
653 const struct fd_type *type;
654
655 fd = device_lookup_private(&fd_cd, FDUNIT(dev));
656 if (fd == NULL)
657 return ENXIO;
658
659 type = fd_dev_to_type(fd, dev);
660 if (type == NULL)
661 return ENXIO;
662
663 if ((fd->sc_flags & FD_OPEN) != 0 &&
664 memcmp(fd->sc_type, type, sizeof(*type)))
665 return EBUSY;
666
667 fd->sc_type_copy = *type;
668 fd->sc_type = &fd->sc_type_copy;
669 fd->sc_cylin = -1;
670 fd->sc_flags |= FD_OPEN;
671
672 return 0;
673 }
674
675 int
fdclose(dev_t dev,int flags,int mode,struct lwp * l)676 fdclose(dev_t dev, int flags, int mode, struct lwp *l)
677 {
678 struct fd_softc *fd = device_lookup_private(&fd_cd, FDUNIT(dev));
679
680 fd->sc_flags &= ~FD_OPEN;
681 return 0;
682 }
683
684 void
fdcstart(struct fdc_softc * fdc)685 fdcstart(struct fdc_softc *fdc)
686 {
687
688 #ifdef DIAGNOSTIC
689 /* only got here if controller's drive queue was inactive; should
690 be in idle state */
691 if (fdc->sc_state != DEVIDLE) {
692 printf("%s: not idle\n", __func__);
693 return;
694 }
695 #endif
696 (void)fdcintr(fdc);
697 }
698
699 static void
fdcpstatus(int n,struct fdc_softc * fdc)700 fdcpstatus(int n, struct fdc_softc *fdc)
701 {
702 char bits[64];
703
704 switch (n) {
705 case 0:
706 printf("\n");
707 break;
708 case 2:
709 snprintb(bits, sizeof(bits), NE7_ST0BITS, fdc->sc_status[0]);
710 printf(" (st0 %s cyl %d)\n", bits, fdc->sc_status[1]);
711 break;
712 case 7:
713 snprintb(bits, sizeof(bits), NE7_ST0BITS, fdc->sc_status[0]);
714 printf(" (st0 %s", bits);
715 snprintb(bits, sizeof(bits), NE7_ST1BITS, fdc->sc_status[1]);
716 printf(" st1 %s", bits);
717 snprintb(bits, sizeof(bits), NE7_ST2BITS, fdc->sc_status[2]);
718 printf(" st2 %s", bits);
719 printf(" cyl %d head %d sec %d)\n",
720 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]);
721 break;
722 #ifdef DIAGNOSTIC
723 default:
724 printf("\nfdcstatus: weird size");
725 break;
726 #endif
727 }
728 }
729
730 void
fdcstatus(device_t dev,int n,const char * s)731 fdcstatus(device_t dev, int n, const char *s)
732 {
733 struct fdc_softc *fdc = device_private(device_parent(dev));
734
735 if (n == 0) {
736 out_fdc(fdc->sc_iot, fdc->sc_ioh, NE7CMD_SENSEI);
737 (void)fdcresult(fdc);
738 n = 2;
739 }
740
741 printf("%s: %s", device_xname(dev), s);
742 fdcpstatus(n, fdc);
743 }
744
745 void
fdctimeout(void * arg)746 fdctimeout(void *arg)
747 {
748 struct fdc_softc *fdc = arg;
749 struct fd_softc *fd = TAILQ_FIRST(&fdc->sc_drives);
750 int s;
751
752 s = splbio();
753 #ifdef DEBUG
754 log(LOG_ERR, "%s: state %d\n", __func__, fdc->sc_state);
755 #endif
756 fdcstatus(fd->sc_dev, 0, "timeout");
757
758 if (bufq_peek(fd->sc_q) != NULL)
759 fdc->sc_state++;
760 else
761 fdc->sc_state = DEVIDLE;
762
763 (void)fdcintr(fdc);
764 splx(s);
765 }
766
767 void
fdcpseudointr(void * arg)768 fdcpseudointr(void *arg)
769 {
770 int s;
771
772 /* Just ensure it has the right spl. */
773 s = splbio();
774 (void)fdcintr(arg);
775 splx(s);
776 }
777
778 int
fdcintr(void * arg)779 fdcintr(void *arg)
780 {
781 struct fdc_softc *fdc = arg;
782 #define st0 fdc->sc_status[0]
783 #define cyl fdc->sc_status[1]
784 struct fd_softc *fd;
785 struct buf *bp;
786 bus_space_tag_t iot = fdc->sc_iot;
787 bus_space_handle_t ioh = fdc->sc_ioh;
788 int read, head, sec, i, nblks;
789 struct fd_type *type;
790
791 loop:
792 /* Is there a drive for the controller to do a transfer with? */
793 fd = TAILQ_FIRST(&fdc->sc_drives);
794 if (fd == NULL) {
795 fdc->sc_state = DEVIDLE;
796 return 1;
797 }
798
799 /* Is there a transfer to this drive? If not, deactivate drive. */
800 bp = bufq_peek(fd->sc_q);
801 if (bp == NULL) {
802 fd->sc_ops = 0;
803 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain);
804 fd->sc_active = 0;
805 goto loop;
806 }
807
808 switch (fdc->sc_state) {
809 case DEVIDLE:
810 fdc->sc_errors = 0;
811 fd->sc_skip = 0;
812 fd->sc_bcount = bp->b_bcount;
813 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE);
814 callout_stop(&fd->sc_motoroff_ch);
815 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) {
816 fdc->sc_state = MOTORWAIT;
817 return 1;
818 }
819 if ((fd->sc_flags & FD_MOTOR) == 0) {
820 /* Turn on the motor, being careful about pairing. */
821 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1];
822 if (ofd && ofd->sc_flags & FD_MOTOR) {
823 callout_stop(&ofd->sc_motoroff_ch);
824 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT);
825 }
826 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT;
827 fd_set_motor(fdc, 0);
828 fdc->sc_state = MOTORWAIT;
829 /* Allow .25s for motor to stabilize. */
830 callout_reset(&fd->sc_motoron_ch, hz / 4,
831 fd_motor_on, fd);
832 return 1;
833 }
834 /* Make sure the right drive is selected. */
835 fd_set_motor(fdc, 0);
836
837 /* fall through */
838 case DOSEEK:
839 doseek:
840 if (fd->sc_cylin == bp->b_cylinder)
841 goto doio;
842
843 out_fdc(iot, ioh, NE7CMD_SPECIFY);/* specify command */
844 out_fdc(iot, ioh, fd->sc_type->steprate);
845 out_fdc(iot, ioh, 6); /* XXX head load time == 6ms */
846
847 out_fdc(iot, ioh, NE7CMD_SEEK); /* seek function */
848 out_fdc(iot, ioh, fd->sc_drive); /* drive number */
849 out_fdc(iot, ioh, bp->b_cylinder * fd->sc_type->step);
850
851 fd->sc_cylin = -1;
852 fdc->sc_state = SEEKWAIT;
853
854 iostat_seek(fd->sc_dk.dk_stats);
855 disk_busy(&fd->sc_dk);
856
857 callout_reset(&fdc->sc_timo_ch, 4 * hz, fdctimeout, fdc);
858 return 1;
859
860 case DOIO:
861 doio:
862 type = fd->sc_type;
863 sec = fd->sc_blkno % type->seccyl;
864 nblks = type->seccyl - sec;
865 nblks = uimin(nblks, fd->sc_bcount / FDC_BSIZE);
866 nblks = uimin(nblks, fdc->sc_maxiosize / FDC_BSIZE);
867 fd->sc_nblks = nblks;
868 fd->sc_nbytes = nblks * FDC_BSIZE;
869 head = sec / type->sectrac;
870 sec -= head * type->sectrac;
871 #ifdef DIAGNOSTIC
872 {
873 int block;
874 block = (fd->sc_cylin * type->heads + head) *
875 type->sectrac + sec;
876 if (block != fd->sc_blkno) {
877 printf("%s: block %d != blkno %" PRId64
878 "\n", __func__, block, fd->sc_blkno);
879 #ifdef DDB
880 Debugger();
881 #endif
882 }
883 }
884 #endif
885 read = (bp->b_flags & B_READ) != 0;
886 FDCDMA_START(fdc, (uint8_t *)bp->b_data + fd->sc_skip,
887 fd->sc_nbytes, read);
888 bus_space_write_1(iot, ioh, FDCTL, type->rate);
889 #ifdef FD_DEBUG
890 printf("%s: %s drive %d track %d head %d sec %d nblks %d\n",
891 __func__, read ? "read" : "write", fd->sc_drive,
892 fd->sc_cylin, head, sec, nblks);
893 #endif
894 if (read)
895 out_fdc(iot, ioh, NE7CMD_READ); /* READ */
896 else
897 out_fdc(iot, ioh, NE7CMD_WRITE);/* WRITE */
898 out_fdc(iot, ioh, (head << 2) | fd->sc_drive);
899 out_fdc(iot, ioh, fd->sc_cylin); /* track */
900 out_fdc(iot, ioh, head);
901 out_fdc(iot, ioh, sec + 1); /* sector + 1 */
902 out_fdc(iot, ioh, type->secsize); /* sector size */
903 out_fdc(iot, ioh, type->sectrac); /* sectors/track */
904 out_fdc(iot, ioh, type->gap1); /* gap1 size */
905 out_fdc(iot, ioh, type->datalen); /* data length */
906 fdc->sc_state = IOCOMPLETE;
907
908 disk_busy(&fd->sc_dk);
909
910 /* allow 2 seconds for operation */
911 callout_reset(&fdc->sc_timo_ch, 2 * hz, fdctimeout, fdc);
912 return 1; /* will return later */
913
914 case SEEKWAIT:
915 callout_stop(&fdc->sc_timo_ch);
916 fdc->sc_state = SEEKCOMPLETE;
917 /* allow 1/50 second for heads to settle */
918 callout_reset(&fdc->sc_intr_ch, hz / 50, fdcpseudointr, fdc);
919 return 1;
920
921 case SEEKCOMPLETE:
922 disk_unbusy(&fd->sc_dk, 0, 0);
923
924 /* Make sure seek really happened. */
925 out_fdc(iot, ioh, NE7CMD_SENSEI);
926 if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 ||
927 cyl != bp->b_cylinder * fd->sc_type->step) {
928 #ifdef FD_DEBUG
929 fdcstatus(fd->sc_dev, 2, "seek failed");
930 #endif
931 fdcretry(fdc);
932 goto loop;
933 }
934 fd->sc_cylin = bp->b_cylinder;
935 goto doio;
936
937 case IOTIMEDOUT:
938 FDCDMA_ABORT(fdc);
939
940 case SEEKTIMEDOUT:
941 case RECALTIMEDOUT:
942 case RESETTIMEDOUT:
943 fdcretry(fdc);
944 goto loop;
945
946 case IOCOMPLETE: /* IO DONE, post-analyze */
947 callout_stop(&fdc->sc_timo_ch);
948
949 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid),
950 (bp->b_flags & B_READ));
951
952 i = fdcresult(fdc);
953 if (i != 7 || (st0 & 0xf8) != 0) {
954 FDCDMA_ABORT(fdc);
955 #ifdef FD_DEBUG
956 fdcstatus(fd->sc_dev, 7, bp->b_flags & B_READ ?
957 "read failed" : "write failed");
958 printf("blkno %" PRId64 " nblks %d\n",
959 fd->sc_blkno, fd->sc_nblks);
960 #endif
961 fdcretry(fdc);
962 goto loop;
963 }
964 FDCDMA_DONE(fdc);
965 if (fdc->sc_errors) {
966 diskerr(bp, "fd", "soft error (corrected)", LOG_PRINTF,
967 fd->sc_skip / FDC_BSIZE, NULL);
968 printf("\n");
969 fdc->sc_errors = 0;
970 }
971 fd->sc_blkno += fd->sc_nblks;
972 fd->sc_skip += fd->sc_nbytes;
973 fd->sc_bcount -= fd->sc_nbytes;
974 if (fd->sc_bcount > 0) {
975 bp->b_cylinder = fd->sc_blkno / fd->sc_type->seccyl;
976 goto doseek;
977 }
978 fdfinish(fd, bp);
979 goto loop;
980
981 case DORESET:
982 /* try a reset, keep motor on */
983 fd_set_motor(fdc, 1);
984 delay(100);
985 fd_set_motor(fdc, 0);
986 fdc->sc_state = RESETCOMPLETE;
987 callout_reset(&fdc->sc_timo_ch, hz / 2, fdctimeout, fdc);
988 return 1; /* will return later */
989
990 case RESETCOMPLETE:
991 callout_stop(&fdc->sc_timo_ch);
992 /* clear the controller output buffer */
993 for (i = 0; i < 4; i++) {
994 out_fdc(iot, ioh, NE7CMD_SENSEI);
995 (void)fdcresult(fdc);
996 }
997
998 /* fall through */
999 case DORECAL:
1000 out_fdc(iot, ioh, NE7CMD_RECAL); /* recalibrate function */
1001 out_fdc(iot, ioh, fd->sc_drive);
1002 fdc->sc_state = RECALWAIT;
1003 callout_reset(&fdc->sc_timo_ch, 5 * hz, fdctimeout, fdc);
1004 return 1; /* will return later */
1005
1006 case RECALWAIT:
1007 callout_stop(&fdc->sc_timo_ch);
1008 fdc->sc_state = RECALCOMPLETE;
1009 /* allow 1/30 second for heads to settle */
1010 callout_reset(&fdc->sc_intr_ch, hz / 30, fdcpseudointr, fdc);
1011 return 1; /* will return later */
1012
1013 case RECALCOMPLETE:
1014 out_fdc(iot, ioh, NE7CMD_SENSEI);
1015 if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) {
1016 #ifdef FD_DEBUG
1017 fdcstatus(fd->sc_dev, 2, "recalibrate failed");
1018 #endif
1019 fdcretry(fdc);
1020 goto loop;
1021 }
1022 fd->sc_cylin = 0;
1023 goto doseek;
1024
1025 case MOTORWAIT:
1026 if (fd->sc_flags & FD_MOTOR_WAIT)
1027 return 1; /* time's not up yet */
1028 goto doseek;
1029
1030 default:
1031 fdcstatus(fd->sc_dev, 0, "stray interrupt");
1032 return 1;
1033 }
1034 #ifdef DIAGNOSTIC
1035 panic("%s: impossible", __func__);
1036 #endif
1037 #undef st0
1038 #undef cyl
1039 }
1040
1041 void
fdcretry(struct fdc_softc * fdc)1042 fdcretry(struct fdc_softc *fdc)
1043 {
1044 struct fd_softc *fd;
1045 struct buf *bp;
1046
1047 fd = TAILQ_FIRST(&fdc->sc_drives);
1048 bp = bufq_peek(fd->sc_q);
1049
1050 switch (fdc->sc_errors) {
1051 case 0:
1052 /* try again */
1053 fdc->sc_state = DOSEEK;
1054 break;
1055
1056 case 1:
1057 case 2:
1058 case 3:
1059 /* didn't work; try recalibrating */
1060 fdc->sc_state = DORECAL;
1061 break;
1062
1063 case 4:
1064 /* still no go; reset the bastard */
1065 fdc->sc_state = DORESET;
1066 break;
1067
1068 default:
1069 diskerr(bp, "fd", "hard error", LOG_PRINTF,
1070 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL);
1071
1072 fdcpstatus(7, fdc);
1073 bp->b_error = EIO;
1074 fdfinish(fd, bp);
1075 }
1076 fdc->sc_errors++;
1077 }
1078
1079 int
fdioctl(dev_t dev,u_long cmd,void * addr,int flag,struct lwp * l)1080 fdioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l)
1081 {
1082 struct fd_softc *fd = device_lookup_private(&fd_cd, FDUNIT(dev));
1083 struct disklabel buffer;
1084 int error;
1085
1086 switch (cmd) {
1087 case DIOCGDINFO:
1088 memset(&buffer, 0, sizeof(buffer));
1089
1090 buffer.d_secpercyl = fd->sc_type->seccyl;
1091 buffer.d_type = DKTYPE_FLOPPY;
1092 buffer.d_secsize = FDC_BSIZE;
1093
1094 if (readdisklabel(dev, fdstrategy, &buffer, NULL) != NULL)
1095 return EINVAL;
1096
1097 *(struct disklabel *)addr = buffer;
1098 return 0;
1099
1100 case DIOCWLABEL:
1101 if ((flag & FWRITE) == 0)
1102 return EBADF;
1103 /* XXX do something */
1104 return 0;
1105
1106 case DIOCWDINFO:
1107 if ((flag & FWRITE) == 0)
1108 return EBADF;
1109
1110 error = setdisklabel(&buffer, (struct disklabel *)addr,
1111 0, NULL);
1112 if (error)
1113 return error;
1114
1115 error = writedisklabel(dev, fdstrategy, &buffer, NULL);
1116 return error;
1117
1118 default:
1119 return ENOTTY;
1120 }
1121
1122 #ifdef DIAGNOSTIC
1123 panic("%s: impossible", __func__);
1124 #endif
1125 }
1126
1127 /*
1128 * Mountroot hook: prompt the user to enter the root file system floppy.
1129 */
1130 void
fd_mountroot_hook(device_t dev)1131 fd_mountroot_hook(device_t dev)
1132 {
1133 int c;
1134
1135 printf("Insert filesystem floppy and press return.");
1136 cnpollc(1);
1137 for (;;) {
1138 c = cngetc();
1139 if ((c == '\r') || (c == '\n')) {
1140 printf("\n");
1141 break;
1142 }
1143 }
1144 cnpollc(0);
1145 }
1146