FreeBSD/Linux Kernel Cross Reference
sys/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 * Copyright (c) 2001 Joerg Wunsch,
22 * joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
23 *
24 * Redistribution and use in source and binary forms, with or without
25 * modification, are permitted provided that the following conditions
26 * are met:
27 * 1. Redistributions of source code must retain the above copyright
28 * notice, this list of conditions and the following disclaimer.
29 * 2. Redistributions in binary form must reproduce the above copyright
30 * notice, this list of conditions and the following disclaimer in the
31 * documentation and/or other materials provided with the distribution.
32 * 3. All advertising materials mentioning features or use of this software
33 * must display the following acknowledgement:
34 * This product includes software developed by the University of
35 * California, Berkeley and its contributors.
36 * 4. Neither the name of the University nor the names of its contributors
37 * may be used to endorse or promote products derived from this software
38 * without specific prior written permission.
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * from: @(#)fd.c 7.4 (Berkeley) 5/25/91
53 * $FreeBSD: releng/5.0/sys/isa/fd.c 109130 2003-01-12 07:32:29Z joerg $
54 */
55
56 #include "opt_fdc.h"
57 #include "card.h"
58
59 #include <sys/param.h>
60 #include <sys/systm.h>
61 #include <sys/bio.h>
62 #include <sys/bus.h>
63 #include <sys/conf.h>
64 #include <sys/devicestat.h>
65 #include <sys/disk.h>
66 #include <sys/fcntl.h>
67 #include <sys/fdcio.h>
68 #include <sys/filio.h>
69 #include <sys/kernel.h>
70 #include <sys/lock.h>
71 #include <sys/malloc.h>
72 #include <sys/module.h>
73 #include <sys/mutex.h>
74 #include <sys/proc.h>
75 #include <sys/syslog.h>
76
77 #include <machine/bus.h>
78 #include <sys/rman.h>
79
80 #include <machine/clock.h>
81 #include <machine/resource.h>
82 #include <machine/stdarg.h>
83
84 #include <isa/isavar.h>
85 #include <isa/isareg.h>
86 #include <isa/fdreg.h>
87 #include <isa/rtc.h>
88
89 enum fdc_type
90 {
91 FDC_NE765, FDC_ENHANCED, FDC_UNKNOWN = -1
92 };
93
94 enum fdc_states {
95 DEVIDLE,
96 FINDWORK,
97 DOSEEK,
98 SEEKCOMPLETE ,
99 IOCOMPLETE,
100 RECALCOMPLETE,
101 STARTRECAL,
102 RESETCTLR,
103 SEEKWAIT,
104 RECALWAIT,
105 MOTORWAIT,
106 IOTIMEDOUT,
107 RESETCOMPLETE,
108 PIOREAD
109 };
110
111 #ifdef FDC_DEBUG
112 static char const * const fdstates[] = {
113 "DEVIDLE",
114 "FINDWORK",
115 "DOSEEK",
116 "SEEKCOMPLETE",
117 "IOCOMPLETE",
118 "RECALCOMPLETE",
119 "STARTRECAL",
120 "RESETCTLR",
121 "SEEKWAIT",
122 "RECALWAIT",
123 "MOTORWAIT",
124 "IOTIMEDOUT",
125 "RESETCOMPLETE",
126 "PIOREAD"
127 };
128 #endif
129
130 /*
131 * Per controller structure (softc).
132 */
133 struct fdc_data
134 {
135 int fdcu; /* our unit number */
136 int dmachan;
137 int flags;
138 #define FDC_ATTACHED 0x01
139 #define FDC_STAT_VALID 0x08
140 #define FDC_HAS_FIFO 0x10
141 #define FDC_NEEDS_RESET 0x20
142 #define FDC_NODMA 0x40
143 #define FDC_ISPNP 0x80
144 #define FDC_ISPCMCIA 0x100
145 struct fd_data *fd;
146 int fdu; /* the active drive */
147 enum fdc_states state;
148 int retry;
149 int fdout; /* mirror of the w/o digital output reg */
150 u_int status[7]; /* copy of the registers */
151 enum fdc_type fdct; /* chip version of FDC */
152 int fdc_errs; /* number of logged errors */
153 int dma_overruns; /* number of DMA overruns */
154 struct bio_queue_head head;
155 struct bio *bp; /* active buffer */
156 struct resource *res_ioport, *res_ctl, *res_irq, *res_drq;
157 int rid_ioport, rid_ctl, rid_irq, rid_drq;
158 int port_off;
159 bus_space_tag_t portt;
160 bus_space_handle_t porth;
161 bus_space_tag_t ctlt;
162 bus_space_handle_t ctlh;
163 void *fdc_intr;
164 struct device *fdc_dev;
165 void (*fdctl_wr)(struct fdc_data *fdc, u_int8_t v);
166 };
167
168 #define FDBIO_FORMAT BIO_CMD2
169
170 typedef int fdu_t;
171 typedef int fdcu_t;
172 typedef int fdsu_t;
173 typedef struct fd_data *fd_p;
174 typedef struct fdc_data *fdc_p;
175 typedef enum fdc_type fdc_t;
176
177 #define FDUNIT(s) (((s) >> 6) & 3)
178 #define FDNUMTOUNIT(n) (((n) & 3) << 6)
179 #define FDTYPE(s) ((s) & 0x3f)
180
181 /*
182 * fdc maintains a set (1!) of ivars per child of each controller.
183 */
184 enum fdc_device_ivars {
185 FDC_IVAR_FDUNIT,
186 };
187
188 /*
189 * Simple access macros for the ivars.
190 */
191 #define FDC_ACCESSOR(A, B, T) \
192 static __inline T fdc_get_ ## A(device_t dev) \
193 { \
194 uintptr_t v; \
195 BUS_READ_IVAR(device_get_parent(dev), dev, FDC_IVAR_ ## B, &v); \
196 return (T) v; \
197 }
198 FDC_ACCESSOR(fdunit, FDUNIT, int)
199
200 /* configuration flags for fdc */
201 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
202
203 /* error returns for fd_cmd() */
204 #define FD_FAILED -1
205 #define FD_NOT_VALID -2
206 #define FDC_ERRMAX 100 /* do not log more */
207 /*
208 * Stop retrying after this many DMA overruns. Since each retry takes
209 * one revolution, with 300 rpm., 25 retries take approximately 5
210 * seconds which the read attempt will block in case the DMA overrun
211 * is persistent.
212 */
213 #define FDC_DMAOV_MAX 25
214
215 /*
216 * Timeout value for the PIO loops to wait until the FDC main status
217 * register matches our expectations (request for master, direction
218 * bit). This is supposed to be a number of microseconds, although
219 * timing might actually not be very accurate.
220 *
221 * Timeouts of 100 msec are believed to be required for some broken
222 * (old) hardware.
223 */
224 #define FDSTS_TIMEOUT 100000
225
226 /*
227 * Number of subdevices that can be used for different density types.
228 * By now, the lower 6 bit of the minor number are reserved for this,
229 * allowing for up to 64 subdevices, but we only use 16 out of this.
230 * Density #0 is used for automatic format detection, the other
231 * densities are available as programmable densities (for assignment
232 * by fdcontrol(8)).
233 * The upper 2 bits of the minor number are reserved for the subunit
234 * (drive #) per controller.
235 */
236 #define NUMDENS 16
237
238 #define FDBIO_RDSECTID BIO_CMD1
239
240 /*
241 * List of native drive densities. Order must match enum fd_drivetype
242 * in <sys/fdcio.h>. Upon attaching the drive, each of the
243 * programmable subdevices is initialized with the native density
244 * definition.
245 */
246 static struct fd_type fd_native_types[] =
247 {
248 { 0 }, /* FDT_NONE */
249 { 9,2,0xFF,0x2A,40, 720,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_360K */
250 { 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* FDT_12M */
251 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_720K */
252 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */
253 #if 0 /* we currently don't handle 2.88 MB */
254 { 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /*FDT_288M*/
255 #else
256 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */
257 #endif
258 };
259
260 /*
261 * 360 KB 5.25" and 720 KB 3.5" drives don't have automatic density
262 * selection, they just start out with their native density (or lose).
263 * So 1.2 MB 5.25", 1.44 MB 3.5", and 2.88 MB 3.5" drives have their
264 * respective lists of densities to search for.
265 */
266 static struct fd_type fd_searchlist_12m[] = {
267 { 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* 1.2M */
268 { 9,2,0xFF,0x23,40, 720,FDC_300KBPS,2,0x50,1,0,FL_MFM|FL_2STEP }, /* 360K */
269 { 9,2,0xFF,0x20,80,1440,FDC_300KBPS,2,0x50,1,0,FL_MFM }, /* 720K */
270 };
271
272 static struct fd_type fd_searchlist_144m[] = {
273 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */
274 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */
275 };
276
277 /* We search for 1.44M first since this is the most common case. */
278 static struct fd_type fd_searchlist_288m[] = {
279 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */
280 #if 0
281 { 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /* 2.88M */
282 #endif
283 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */
284 };
285
286 #define MAX_SEC_SIZE (128 << 3)
287 #define MAX_CYLINDER 85 /* some people really stress their drives
288 * up to cyl 82 */
289 #define MAX_HEAD 1
290
291 static devclass_t fdc_devclass;
292
293 /*
294 * Per drive structure (softc).
295 */
296 struct fd_data {
297 struct fdc_data *fdc; /* pointer to controller structure */
298 int fdsu; /* this units number on this controller */
299 enum fd_drivetype type; /* drive type */
300 struct fd_type *ft; /* pointer to current type descriptor */
301 struct fd_type fts[NUMDENS]; /* type descriptors */
302 int flags;
303 #define FD_OPEN 0x01 /* it's open */
304 #define FD_NONBLOCK 0x02 /* O_NONBLOCK set */
305 #define FD_ACTIVE 0x04 /* it's active */
306 #define FD_MOTOR 0x08 /* motor should be on */
307 #define FD_MOTOR_WAIT 0x10 /* motor coming up */
308 #define FD_UA 0x20 /* force unit attention */
309 int skip;
310 int hddrv;
311 #define FD_NO_TRACK -2
312 int track; /* where we think the head is */
313 int options; /* user configurable options, see fdcio.h */
314 struct callout_handle toffhandle;
315 struct callout_handle tohandle;
316 struct devstat device_stats;
317 eventhandler_tag clonetag;
318 dev_t masterdev;
319 dev_t clonedevs[NUMDENS - 1];
320 device_t dev;
321 fdu_t fdu;
322 };
323
324 struct fdc_ivars {
325 int fdunit;
326 };
327 static devclass_t fd_devclass;
328
329 /* configuration flags for fd */
330 #define FD_TYPEMASK 0x0f /* drive type, matches enum
331 * fd_drivetype; on i386 machines, if
332 * given as 0, use RTC type for fd0
333 * and fd1 */
334 #define FD_DTYPE(flags) ((flags) & FD_TYPEMASK)
335 #define FD_NO_CHLINE 0x10 /* drive does not support changeline
336 * aka. unit attention */
337 #define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just
338 * assume it is there */
339
340 /*
341 * Throughout this file the following conventions will be used:
342 *
343 * fd is a pointer to the fd_data struct for the drive in question
344 * fdc is a pointer to the fdc_data struct for the controller
345 * fdu is the floppy drive unit number
346 * fdcu is the floppy controller unit number
347 * fdsu is the floppy drive unit number on that controller. (sub-unit)
348 */
349
350 /*
351 * Function declarations, same (chaotic) order as they appear in the
352 * file. Re-ordering is too late now, it would only obfuscate the
353 * diffs against old and offspring versions (like the PC98 one).
354 *
355 * Anyone adding functions here, please keep this sequence the same
356 * as below -- makes locating a particular function in the body much
357 * easier.
358 */
359 static void fdout_wr(fdc_p, u_int8_t);
360 static u_int8_t fdsts_rd(fdc_p);
361 static void fddata_wr(fdc_p, u_int8_t);
362 static u_int8_t fddata_rd(fdc_p);
363 static void fdctl_wr_isa(fdc_p, u_int8_t);
364 #if NCARD > 0
365 static void fdctl_wr_pcmcia(fdc_p, u_int8_t);
366 #endif
367 #if 0
368 static u_int8_t fdin_rd(fdc_p);
369 #endif
370 static int fdc_err(struct fdc_data *, const char *);
371 static int fd_cmd(struct fdc_data *, int, ...);
372 static int enable_fifo(fdc_p fdc);
373 static int fd_sense_drive_status(fdc_p, int *);
374 static int fd_sense_int(fdc_p, int *, int *);
375 static int fd_read_status(fdc_p);
376 static int fdc_alloc_resources(struct fdc_data *);
377 static void fdc_release_resources(struct fdc_data *);
378 static int fdc_read_ivar(device_t, device_t, int, uintptr_t *);
379 static int fdc_probe(device_t);
380 #if NCARD > 0
381 static int fdc_pccard_probe(device_t);
382 #endif
383 static int fdc_detach(device_t dev);
384 static void fdc_add_child(device_t, const char *, int);
385 static int fdc_attach(device_t);
386 static int fdc_print_child(device_t, device_t);
387 static void fd_clone (void *, char *, int, dev_t *);
388 static int fd_probe(device_t);
389 static int fd_attach(device_t);
390 static int fd_detach(device_t);
391 static void set_motor(struct fdc_data *, int, int);
392 # define TURNON 1
393 # define TURNOFF 0
394 static timeout_t fd_turnoff;
395 static timeout_t fd_motor_on;
396 static void fd_turnon(struct fd_data *);
397 static void fdc_reset(fdc_p);
398 static int fd_in(struct fdc_data *, int *);
399 static int out_fdc(struct fdc_data *, int);
400 /*
401 * The open function is named Fdopen() to avoid confusion with fdopen()
402 * in fd(4). The difference is now only meaningful for debuggers.
403 */
404 static d_open_t Fdopen;
405 static d_close_t fdclose;
406 static d_strategy_t fdstrategy;
407 static void fdstart(struct fdc_data *);
408 static timeout_t fd_iotimeout;
409 static timeout_t fd_pseudointr;
410 static driver_intr_t fdc_intr;
411 static int fdcpio(fdc_p, long, caddr_t, u_int);
412 static int fdautoselect(dev_t);
413 static int fdstate(struct fdc_data *);
414 static int retrier(struct fdc_data *);
415 static void fdbiodone(struct bio *);
416 static int fdmisccmd(dev_t, u_int, void *);
417 static d_ioctl_t fdioctl;
418
419 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
420
421 #ifdef FDC_DEBUG
422 /* CAUTION: fd_debug causes huge amounts of logging output */
423 static int volatile fd_debug = 0;
424 #define TRACE0(arg) do { if (fd_debug) printf(arg); } while (0)
425 #define TRACE1(arg1, arg2) do { if (fd_debug) printf(arg1, arg2); } while (0)
426 #else /* FDC_DEBUG */
427 #define TRACE0(arg) do { } while (0)
428 #define TRACE1(arg1, arg2) do { } while (0)
429 #endif /* FDC_DEBUG */
430
431 /*
432 * Bus space handling (access to low-level IO).
433 */
434 static void
435 fdout_wr(fdc_p fdc, u_int8_t v)
436 {
437 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
438 }
439
440 static u_int8_t
441 fdsts_rd(fdc_p fdc)
442 {
443 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
444 }
445
446 static void
447 fddata_wr(fdc_p fdc, u_int8_t v)
448 {
449 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
450 }
451
452 static u_int8_t
453 fddata_rd(fdc_p fdc)
454 {
455 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
456 }
457
458 static void
459 fdctl_wr_isa(fdc_p fdc, u_int8_t v)
460 {
461 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
462 }
463
464 #if NCARD > 0
465 static void
466 fdctl_wr_pcmcia(fdc_p fdc, u_int8_t v)
467 {
468 bus_space_write_1(fdc->portt, fdc->porth, FDCTL+fdc->port_off, v);
469 }
470 #endif
471
472 static u_int8_t
473 fdin_rd(fdc_p fdc)
474 {
475 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
476 }
477
478 #define CDEV_MAJOR 9
479 static struct cdevsw fd_cdevsw = {
480 /* open */ Fdopen,
481 /* close */ fdclose,
482 /* read */ physread,
483 /* write */ physwrite,
484 /* ioctl */ fdioctl,
485 /* poll */ nopoll,
486 /* mmap */ nommap,
487 /* strategy */ fdstrategy,
488 /* name */ "fd",
489 /* maj */ CDEV_MAJOR,
490 /* dump */ nodump,
491 /* psize */ nopsize,
492 /* flags */ D_DISK,
493 };
494
495 /*
496 * Auxiliary functions. Well, some only. Others are scattered
497 * throughout the entire file.
498 */
499 static int
500 fdc_err(struct fdc_data *fdc, const char *s)
501 {
502 fdc->fdc_errs++;
503 if (s) {
504 if (fdc->fdc_errs < FDC_ERRMAX)
505 device_printf(fdc->fdc_dev, "%s", s);
506 else if (fdc->fdc_errs == FDC_ERRMAX)
507 device_printf(fdc->fdc_dev, "too many errors, not "
508 "logging any more\n");
509 }
510
511 return FD_FAILED;
512 }
513
514 /*
515 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
516 * Unit number,
517 * # of output bytes, output bytes as ints ...,
518 * # of input bytes, input bytes as ints ...
519 */
520 static int
521 fd_cmd(struct fdc_data *fdc, int n_out, ...)
522 {
523 u_char cmd;
524 int n_in;
525 int n;
526 va_list ap;
527
528 va_start(ap, n_out);
529 cmd = (u_char)(va_arg(ap, int));
530 va_end(ap);
531 va_start(ap, n_out);
532 for (n = 0; n < n_out; n++)
533 {
534 if (out_fdc(fdc, va_arg(ap, int)) < 0)
535 {
536 char msg[50];
537 snprintf(msg, sizeof(msg),
538 "cmd %x failed at out byte %d of %d\n",
539 cmd, n + 1, n_out);
540 return fdc_err(fdc, msg);
541 }
542 }
543 n_in = va_arg(ap, int);
544 for (n = 0; n < n_in; n++)
545 {
546 int *ptr = va_arg(ap, int *);
547 if (fd_in(fdc, ptr) < 0)
548 {
549 char msg[50];
550 snprintf(msg, sizeof(msg),
551 "cmd %02x failed at in byte %d of %d\n",
552 cmd, n + 1, n_in);
553 return fdc_err(fdc, msg);
554 }
555 }
556
557 return 0;
558 }
559
560 static int
561 enable_fifo(fdc_p fdc)
562 {
563 int i, j;
564
565 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
566
567 /*
568 * Cannot use fd_cmd the normal way here, since
569 * this might be an invalid command. Thus we send the
570 * first byte, and check for an early turn of data directon.
571 */
572
573 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
574 return fdc_err(fdc, "Enable FIFO failed\n");
575
576 /* If command is invalid, return */
577 j = FDSTS_TIMEOUT;
578 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
579 != NE7_RQM && j-- > 0) {
580 if (i == (NE7_DIO | NE7_RQM)) {
581 fdc_reset(fdc);
582 return FD_FAILED;
583 }
584 DELAY(1);
585 }
586 if (j<0 ||
587 fd_cmd(fdc, 3,
588 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
589 fdc_reset(fdc);
590 return fdc_err(fdc, "Enable FIFO failed\n");
591 }
592 fdc->flags |= FDC_HAS_FIFO;
593 return 0;
594 }
595 if (fd_cmd(fdc, 4,
596 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
597 return fdc_err(fdc, "Re-enable FIFO failed\n");
598 return 0;
599 }
600
601 static int
602 fd_sense_drive_status(fdc_p fdc, int *st3p)
603 {
604 int st3;
605
606 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
607 {
608 return fdc_err(fdc, "Sense Drive Status failed\n");
609 }
610 if (st3p)
611 *st3p = st3;
612
613 return 0;
614 }
615
616 static int
617 fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
618 {
619 int cyl, st0, ret;
620
621 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
622 if (ret) {
623 (void)fdc_err(fdc,
624 "sense intr err reading stat reg 0\n");
625 return ret;
626 }
627
628 if (st0p)
629 *st0p = st0;
630
631 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
632 /*
633 * There doesn't seem to have been an interrupt.
634 */
635 return FD_NOT_VALID;
636 }
637
638 if (fd_in(fdc, &cyl) < 0) {
639 return fdc_err(fdc, "can't get cyl num\n");
640 }
641
642 if (cylp)
643 *cylp = cyl;
644
645 return 0;
646 }
647
648
649 static int
650 fd_read_status(fdc_p fdc)
651 {
652 int i, ret;
653
654 for (i = ret = 0; i < 7; i++) {
655 /*
656 * XXX types are poorly chosen. Only bytes can be read
657 * from the hardware, but fdc->status[] wants u_ints and
658 * fd_in() gives ints.
659 */
660 int status;
661
662 ret = fd_in(fdc, &status);
663 fdc->status[i] = status;
664 if (ret != 0)
665 break;
666 }
667
668 if (ret == 0)
669 fdc->flags |= FDC_STAT_VALID;
670 else
671 fdc->flags &= ~FDC_STAT_VALID;
672
673 return ret;
674 }
675
676 static int
677 fdc_alloc_resources(struct fdc_data *fdc)
678 {
679 device_t dev;
680 int ispnp, ispcmcia, nports;
681
682 dev = fdc->fdc_dev;
683 ispnp = (fdc->flags & FDC_ISPNP) != 0;
684 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
685 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
686 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
687
688 /*
689 * On standard ISA, we don't just use an 8 port range
690 * (e.g. 0x3f0-0x3f7) since that covers an IDE control
691 * register at 0x3f6.
692 *
693 * Isn't PC hardware wonderful.
694 *
695 * The Y-E Data PCMCIA FDC doesn't have this problem, it
696 * uses the register with offset 6 for pseudo-DMA, and the
697 * one with offset 7 as control register.
698 */
699 nports = ispcmcia ? 8 : (ispnp ? 1 : 6);
700 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
701 &fdc->rid_ioport, 0ul, ~0ul,
702 nports, RF_ACTIVE);
703 if (fdc->res_ioport == 0) {
704 device_printf(dev, "cannot reserve I/O port range (%d ports)\n",
705 nports);
706 return ENXIO;
707 }
708 fdc->portt = rman_get_bustag(fdc->res_ioport);
709 fdc->porth = rman_get_bushandle(fdc->res_ioport);
710
711 if (!ispcmcia) {
712 /*
713 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
714 * and some at 0x3f0-0x3f5,0x3f7. We detect the former
715 * by checking the size and adjust the port address
716 * accordingly.
717 */
718 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
719 fdc->port_off = -2;
720
721 /*
722 * Register the control port range as rid 1 if it
723 * isn't there already. Most PnP BIOSen will have
724 * already done this but non-PnP configurations don't.
725 *
726 * And some (!!) report 0x3f2-0x3f5 and completely
727 * leave out the control register! It seems that some
728 * non-antique controller chips have a different
729 * method of programming the transfer speed which
730 * doesn't require the control register, but it's
731 * mighty bogus as the chip still responds to the
732 * address for the control register.
733 */
734 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
735 u_long ctlstart;
736
737 /* Find the control port, usually 0x3f7 */
738 ctlstart = rman_get_start(fdc->res_ioport) +
739 fdc->port_off + 7;
740
741 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
742 }
743
744 /*
745 * Now (finally!) allocate the control port.
746 */
747 fdc->rid_ctl = 1;
748 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
749 &fdc->rid_ctl,
750 0ul, ~0ul, 1, RF_ACTIVE);
751 if (fdc->res_ctl == 0) {
752 device_printf(dev,
753 "cannot reserve control I/O port range (control port)\n");
754 return ENXIO;
755 }
756 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
757 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
758 }
759
760 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
761 &fdc->rid_irq, 0ul, ~0ul, 1,
762 RF_ACTIVE);
763 if (fdc->res_irq == 0) {
764 device_printf(dev, "cannot reserve interrupt line\n");
765 return ENXIO;
766 }
767
768 if ((fdc->flags & FDC_NODMA) == 0) {
769 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
770 &fdc->rid_drq, 0ul, ~0ul, 1,
771 RF_ACTIVE);
772 if (fdc->res_drq == 0) {
773 device_printf(dev, "cannot reserve DMA request line\n");
774 return ENXIO;
775 }
776 fdc->dmachan = fdc->res_drq->r_start;
777 }
778
779 return 0;
780 }
781
782 static void
783 fdc_release_resources(struct fdc_data *fdc)
784 {
785 device_t dev;
786
787 dev = fdc->fdc_dev;
788 if (fdc->res_irq != 0) {
789 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
790 fdc->res_irq);
791 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
792 fdc->res_irq);
793 }
794 if (fdc->res_ctl != 0) {
795 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
796 fdc->res_ctl);
797 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
798 fdc->res_ctl);
799 }
800 if (fdc->res_ioport != 0) {
801 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
802 fdc->res_ioport);
803 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
804 fdc->res_ioport);
805 }
806 if (fdc->res_drq != 0) {
807 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
808 fdc->res_drq);
809 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
810 fdc->res_drq);
811 }
812 }
813
814 /*
815 * Configuration/initialization stuff, per controller.
816 */
817
818 static struct isa_pnp_id fdc_ids[] = {
819 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
820 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
821 {0}
822 };
823
824 static int
825 fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
826 {
827 struct fdc_ivars *ivars = device_get_ivars(child);
828
829 switch (which) {
830 case FDC_IVAR_FDUNIT:
831 *result = ivars->fdunit;
832 break;
833 default:
834 return ENOENT;
835 }
836 return 0;
837 }
838
839 static int
840 fdc_probe(device_t dev)
841 {
842 int error, ic_type;
843 struct fdc_data *fdc;
844
845 fdc = device_get_softc(dev);
846 bzero(fdc, sizeof *fdc);
847 fdc->fdc_dev = dev;
848 fdc->fdctl_wr = fdctl_wr_isa;
849
850 /* Check pnp ids */
851 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
852 if (error == ENXIO)
853 return ENXIO;
854 if (error == 0)
855 fdc->flags |= FDC_ISPNP;
856
857 /* Attempt to allocate our resources for the duration of the probe */
858 error = fdc_alloc_resources(fdc);
859 if (error)
860 goto out;
861
862 /* First - lets reset the floppy controller */
863 fdout_wr(fdc, 0);
864 DELAY(100);
865 fdout_wr(fdc, FDO_FRST);
866
867 /* see if it can handle a command */
868 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
869 NE7_SPEC_2(2, 0), 0)) {
870 error = ENXIO;
871 goto out;
872 }
873
874 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
875 ic_type = (u_char)ic_type;
876 switch (ic_type) {
877 case 0x80:
878 device_set_desc(dev, "NEC 765 or clone");
879 fdc->fdct = FDC_NE765;
880 break;
881 case 0x81: /* not mentioned in any hardware doc */
882 case 0x90:
883 device_set_desc(dev,
884 "Enhanced floppy controller (i82077, NE72065 or clone)");
885 fdc->fdct = FDC_ENHANCED;
886 break;
887 default:
888 device_set_desc(dev, "Generic floppy controller");
889 fdc->fdct = FDC_UNKNOWN;
890 break;
891 }
892 }
893
894 out:
895 fdc_release_resources(fdc);
896 return (error);
897 }
898
899 #if NCARD > 0
900
901 static int
902 fdc_pccard_probe(device_t dev)
903 {
904 int error;
905 struct fdc_data *fdc;
906
907 fdc = device_get_softc(dev);
908 bzero(fdc, sizeof *fdc);
909 fdc->fdc_dev = dev;
910 fdc->fdctl_wr = fdctl_wr_pcmcia;
911
912 fdc->flags |= FDC_ISPCMCIA | FDC_NODMA;
913
914 /* Attempt to allocate our resources for the duration of the probe */
915 error = fdc_alloc_resources(fdc);
916 if (error)
917 goto out;
918
919 /* First - lets reset the floppy controller */
920 fdout_wr(fdc, 0);
921 DELAY(100);
922 fdout_wr(fdc, FDO_FRST);
923
924 /* see if it can handle a command */
925 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
926 NE7_SPEC_2(2, 0), 0)) {
927 error = ENXIO;
928 goto out;
929 }
930
931 device_set_desc(dev, "Y-E Data PCMCIA floppy");
932 fdc->fdct = FDC_NE765;
933
934 out:
935 fdc_release_resources(fdc);
936 return (error);
937 }
938
939 #endif /* NCARD > 0 */
940
941 static int
942 fdc_detach(device_t dev)
943 {
944 struct fdc_data *fdc;
945 int error;
946
947 fdc = device_get_softc(dev);
948
949 /* have our children detached first */
950 if ((error = bus_generic_detach(dev)))
951 return (error);
952
953 /* reset controller, turn motor off */
954 fdout_wr(fdc, 0);
955
956 if ((fdc->flags & FDC_NODMA) == 0)
957 isa_dma_release(fdc->dmachan);
958
959 if ((fdc->flags & FDC_ATTACHED) == 0) {
960 device_printf(dev, "already unloaded\n");
961 return (0);
962 }
963 fdc->flags &= ~FDC_ATTACHED;
964
965 BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq,
966 fdc->fdc_intr);
967 fdc_release_resources(fdc);
968 device_printf(dev, "unload\n");
969 return (0);
970 }
971
972 /*
973 * Add a child device to the fdc controller. It will then be probed etc.
974 */
975 static void
976 fdc_add_child(device_t dev, const char *name, int unit)
977 {
978 int disabled, flags;
979 struct fdc_ivars *ivar;
980 device_t child;
981
982 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO);
983 if (ivar == NULL)
984 return;
985 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
986 ivar->fdunit = 0;
987 child = device_add_child(dev, name, unit);
988 if (child == NULL) {
989 free(ivar, M_DEVBUF);
990 return;
991 }
992 device_set_ivars(child, ivar);
993 if (resource_int_value(name, unit, "flags", &flags) == 0)
994 device_set_flags(child, flags);
995 if (resource_int_value(name, unit, "disabled", &disabled) == 0
996 && disabled != 0)
997 device_disable(child);
998 }
999
1000 static int
1001 fdc_attach(device_t dev)
1002 {
1003 struct fdc_data *fdc;
1004 const char *name, *dname;
1005 int i, error, dunit;
1006
1007 fdc = device_get_softc(dev);
1008 error = fdc_alloc_resources(fdc);
1009 if (error) {
1010 device_printf(dev, "cannot re-acquire resources\n");
1011 return error;
1012 }
1013 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
1014 INTR_TYPE_BIO | INTR_ENTROPY, fdc_intr, fdc,
1015 &fdc->fdc_intr);
1016 if (error) {
1017 device_printf(dev, "cannot setup interrupt\n");
1018 return error;
1019 }
1020 fdc->fdcu = device_get_unit(dev);
1021 fdc->flags |= FDC_ATTACHED | FDC_NEEDS_RESET;
1022
1023 if ((fdc->flags & FDC_NODMA) == 0) {
1024 /*
1025 * Acquire the DMA channel forever, the driver will do
1026 * the rest
1027 * XXX should integrate with rman
1028 */
1029 isa_dma_acquire(fdc->dmachan);
1030 isa_dmainit(fdc->dmachan, MAX_SEC_SIZE);
1031 }
1032 fdc->state = DEVIDLE;
1033
1034 /* reset controller, turn motor off, clear fdout mirror reg */
1035 fdout_wr(fdc, fdc->fdout = 0);
1036 bioq_init(&fdc->head);
1037
1038 /*
1039 * Probe and attach any children. We should probably detect
1040 * devices from the BIOS unless overridden.
1041 */
1042 name = device_get_nameunit(dev);
1043 i = 0;
1044 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0)
1045 fdc_add_child(dev, dname, dunit);
1046
1047 if ((error = bus_generic_attach(dev)) != 0)
1048 return (error);
1049
1050 return (0);
1051 }
1052
1053 static int
1054 fdc_print_child(device_t me, device_t child)
1055 {
1056 int retval = 0, flags;
1057
1058 retval += bus_print_child_header(me, child);
1059 retval += printf(" on %s drive %d", device_get_nameunit(me),
1060 fdc_get_fdunit(child));
1061 if ((flags = device_get_flags(me)) != 0)
1062 retval += printf(" flags %#x", flags);
1063 retval += printf("\n");
1064
1065 return (retval);
1066 }
1067
1068 static device_method_t fdc_methods[] = {
1069 /* Device interface */
1070 DEVMETHOD(device_probe, fdc_probe),
1071 DEVMETHOD(device_attach, fdc_attach),
1072 DEVMETHOD(device_detach, fdc_detach),
1073 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1074 DEVMETHOD(device_suspend, bus_generic_suspend),
1075 DEVMETHOD(device_resume, bus_generic_resume),
1076
1077 /* Bus interface */
1078 DEVMETHOD(bus_print_child, fdc_print_child),
1079 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
1080 /* Our children never use any other bus interface methods. */
1081
1082 { 0, 0 }
1083 };
1084
1085 static driver_t fdc_driver = {
1086 "fdc",
1087 fdc_methods,
1088 sizeof(struct fdc_data)
1089 };
1090
1091 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
1092 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, 0, 0);
1093
1094 #if NCARD > 0
1095
1096 static device_method_t fdc_pccard_methods[] = {
1097 /* Device interface */
1098 DEVMETHOD(device_probe, fdc_pccard_probe),
1099 DEVMETHOD(device_attach, fdc_attach),
1100 DEVMETHOD(device_detach, fdc_detach),
1101 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1102 DEVMETHOD(device_suspend, bus_generic_suspend),
1103 DEVMETHOD(device_resume, bus_generic_resume),
1104
1105 /* Bus interface */
1106 DEVMETHOD(bus_print_child, fdc_print_child),
1107 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
1108 /* Our children never use any other bus interface methods. */
1109
1110 { 0, 0 }
1111 };
1112
1113 static driver_t fdc_pccard_driver = {
1114 "fdc",
1115 fdc_pccard_methods,
1116 sizeof(struct fdc_data)
1117 };
1118
1119 DRIVER_MODULE(fdc, pccard, fdc_pccard_driver, fdc_devclass, 0, 0);
1120
1121 #endif /* NCARD > 0 */
1122
1123 /*
1124 * Create a clone device upon request by devfs.
1125 */
1126 static void
1127 fd_clone(void *arg, char *name, int namelen, dev_t *dev)
1128 {
1129 struct fd_data *fd;
1130 int i, u;
1131 char *n;
1132 size_t l;
1133
1134 fd = (struct fd_data *)arg;
1135 if (*dev != NODEV)
1136 return;
1137 if (dev_stdclone(name, &n, "fd", &u) != 2)
1138 return;
1139 if (u != fd->fdu)
1140 /* unit # mismatch */
1141 return;
1142 l = strlen(n);
1143 if (l == 1 && *n >= 'a' && *n <= 'h') {
1144 /*
1145 * Trailing letters a through h denote
1146 * pseudo-partitions. We don't support true
1147 * (UFS-style) partitions, so we just implement them
1148 * as symlinks if someone asks us nicely.
1149 */
1150 *dev = make_dev_alias(fd->masterdev, name);
1151 return;
1152 }
1153 if (l >= 2 && l <= 5 && *n == '.') {
1154 /*
1155 * Trailing numbers, preceded by a dot, denote
1156 * subdevices for different densities. Historically,
1157 * they have been named by density (like fd0.1440),
1158 * but we allow arbitrary numbers between 1 and 4
1159 * digits, so fd0.1 through fd0.15 are possible as
1160 * well.
1161 */
1162 for (i = 1; i < l; i++)
1163 if (n[i] < '' || n[i] > '9')
1164 return;
1165 for (i = 0; i < NUMDENS - 1; i++)
1166 if (fd->clonedevs[i] == NODEV) {
1167 *dev = make_dev(&fd_cdevsw,
1168 FDNUMTOUNIT(u) + i + 1,
1169 UID_ROOT, GID_OPERATOR, 0640,
1170 name);
1171 fd->clonedevs[i] = *dev;
1172 return;
1173 }
1174 }
1175 }
1176
1177 /*
1178 * Configuration/initialization, per drive.
1179 */
1180 static int
1181 fd_probe(device_t dev)
1182 {
1183 int i;
1184 u_int st0, st3;
1185 struct fd_data *fd;
1186 struct fdc_data *fdc;
1187 fdsu_t fdsu;
1188 int flags;
1189
1190 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
1191 fd = device_get_softc(dev);
1192 fdc = device_get_softc(device_get_parent(dev));
1193 flags = device_get_flags(dev);
1194
1195 bzero(fd, sizeof *fd);
1196 fd->dev = dev;
1197 fd->fdc = fdc;
1198 fd->fdsu = fdsu;
1199 fd->fdu = device_get_unit(dev);
1200 fd->flags = FD_UA; /* make sure fdautoselect() will be called */
1201
1202 fd->type = FD_DTYPE(flags);
1203 /*
1204 * XXX I think using __i386__ is wrong here since we actually want to probe
1205 * for the machine type, not the CPU type (so non-PC arch's like the PC98 will
1206 * fail the probe). However, for whatever reason, testing for _MACHINE_ARCH
1207 * == i386 breaks the test on FreeBSD/Alpha.
1208 */
1209 #ifdef __i386__
1210 if (fd->type == FDT_NONE && (fd->fdu == 0 || fd->fdu == 1)) {
1211 /* Look up what the BIOS thinks we have. */
1212 if (fd->fdu == 0) {
1213 if ((fdc->flags & FDC_ISPCMCIA))
1214 /*
1215 * Somewhat special. No need to force the
1216 * user to set device flags, since the Y-E
1217 * Data PCMCIA floppy is always a 1.44 MB
1218 * device.
1219 */
1220 fd->type = FDT_144M;
1221 else
1222 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4;
1223 } else {
1224 fd->type = rtcin(RTC_FDISKETTE) & 0x0f;
1225 }
1226 if (fd->type == FDT_288M_1)
1227 fd->type = FDT_288M;
1228 }
1229 #endif /* __i386__ */
1230 /* is there a unit? */
1231 if (fd->type == FDT_NONE)
1232 return (ENXIO);
1233
1234 /* select it */
1235 set_motor(fdc, fdsu, TURNON);
1236 fdc_reset(fdc); /* XXX reset, then unreset, etc. */
1237 DELAY(1000000); /* 1 sec */
1238
1239 /* XXX This doesn't work before the first set_motor() */
1240 if ((fdc->flags & FDC_HAS_FIFO) == 0 &&
1241 fdc->fdct == FDC_ENHANCED &&
1242 (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 &&
1243 enable_fifo(fdc) == 0) {
1244 device_printf(device_get_parent(dev),
1245 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
1246 }
1247
1248 if ((flags & FD_NO_PROBE) == 0) {
1249 /* If we're at track 0 first seek inwards. */
1250 if ((fd_sense_drive_status(fdc, &st3) == 0) &&
1251 (st3 & NE7_ST3_T0)) {
1252 /* Seek some steps... */
1253 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
1254 /* ...wait a moment... */
1255 DELAY(300000);
1256 /* make ctrlr happy: */
1257 fd_sense_int(fdc, 0, 0);
1258 }
1259 }
1260
1261 for (i = 0; i < 2; i++) {
1262 /*
1263 * we must recalibrate twice, just in case the
1264 * heads have been beyond cylinder 76, since
1265 * most FDCs still barf when attempting to
1266 * recalibrate more than 77 steps
1267 */
1268 /* go back to 0: */
1269 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
1270 /* a second being enough for full stroke seek*/
1271 DELAY(i == 0 ? 1000000 : 300000);
1272
1273 /* anything responding? */
1274 if (fd_sense_int(fdc, &st0, 0) == 0 &&
1275 (st0 & NE7_ST0_EC) == 0)
1276 break; /* already probed succesfully */
1277 }
1278 }
1279 }
1280
1281 set_motor(fdc, fdsu, TURNOFF);
1282
1283 if ((flags & FD_NO_PROBE) == 0 &&
1284 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */
1285 return (ENXIO);
1286
1287 switch (fd->type) {
1288 case FDT_12M:
1289 device_set_desc(dev, "1200-KB 5.25\" drive");
1290 fd->type = FDT_12M;
1291 break;
1292 case FDT_144M:
1293 device_set_desc(dev, "1440-KB 3.5\" drive");
1294 fd->type = FDT_144M;
1295 break;
1296 case FDT_288M:
1297 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
1298 fd->type = FDT_288M;
1299 break;
1300 case FDT_360K:
1301 device_set_desc(dev, "360-KB 5.25\" drive");
1302 fd->type = FDT_360K;
1303 break;
1304 case FDT_720K:
1305 device_set_desc(dev, "720-KB 3.5\" drive");
1306 fd->type = FDT_720K;
1307 break;
1308 default:
1309 return (ENXIO);
1310 }
1311 fd->track = FD_NO_TRACK;
1312 fd->fdc = fdc;
1313 fd->fdsu = fdsu;
1314 fd->options = 0;
1315 callout_handle_init(&fd->toffhandle);
1316 callout_handle_init(&fd->tohandle);
1317
1318 /* initialize densities for subdevices */
1319 for (i = 0; i < NUMDENS; i++)
1320 memcpy(fd->fts + i, fd_native_types + fd->type,
1321 sizeof(struct fd_type));
1322 return (0);
1323 }
1324
1325 static int
1326 fd_attach(device_t dev)
1327 {
1328 struct fd_data *fd;
1329 static int cdevsw_add_done;
1330 int i;
1331
1332 if (!cdevsw_add_done) {
1333 cdevsw_add(&fd_cdevsw); /* XXX */
1334 cdevsw_add_done = 1;
1335 }
1336 fd = device_get_softc(dev);
1337 fd->clonetag = EVENTHANDLER_REGISTER(dev_clone, fd_clone, fd, 1000);
1338 fd->masterdev = make_dev(&fd_cdevsw, fd->fdu << 6,
1339 UID_ROOT, GID_OPERATOR, 0640, "fd%d", fd->fdu);
1340 for (i = 0; i < NUMDENS - 1; i++)
1341 fd->clonedevs[i] = NODEV;
1342 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1343 device_get_unit(dev), 0, DEVSTAT_NO_ORDERED_TAGS,
1344 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1345 DEVSTAT_PRIORITY_FD);
1346 return (0);
1347 }
1348
1349 static int
1350 fd_detach(device_t dev)
1351 {
1352 struct fd_data *fd;
1353 int i;
1354
1355 fd = device_get_softc(dev);
1356 untimeout(fd_turnoff, fd, fd->toffhandle);
1357 devstat_remove_entry(&fd->device_stats);
1358 destroy_dev(fd->masterdev);
1359 for (i = 0; i < NUMDENS - 1; i++)
1360 if (fd->clonedevs[i] != NODEV)
1361 destroy_dev(fd->clonedevs[i]);
1362 cdevsw_remove(&fd_cdevsw);
1363 EVENTHANDLER_DEREGISTER(dev_clone, fd->clonetag);
1364
1365 return (0);
1366 }
1367
1368 static device_method_t fd_methods[] = {
1369 /* Device interface */
1370 DEVMETHOD(device_probe, fd_probe),
1371 DEVMETHOD(device_attach, fd_attach),
1372 DEVMETHOD(device_detach, fd_detach),
1373 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1374 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1375 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1376
1377 { 0, 0 }
1378 };
1379
1380 static driver_t fd_driver = {
1381 "fd",
1382 fd_methods,
1383 sizeof(struct fd_data)
1384 };
1385
1386 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1387
1388 /*
1389 * More auxiliary functions.
1390 */
1391 /*
1392 * Motor control stuff.
1393 * Remember to not deselect the drive we're working on.
1394 */
1395 static void
1396 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1397 {
1398 int fdout;
1399
1400 fdout = fdc->fdout;
1401 if (turnon) {
1402 fdout &= ~FDO_FDSEL;
1403 fdout |= (FDO_MOEN0 << fdsu) | FDO_FDMAEN | FDO_FRST | fdsu;
1404 } else
1405 fdout &= ~(FDO_MOEN0 << fdsu);
1406 fdc->fdout = fdout;
1407 fdout_wr(fdc, fdout);
1408 TRACE1("[0x%x->FDOUT]", fdout);
1409 }
1410
1411 static void
1412 fd_turnoff(void *xfd)
1413 {
1414 int s;
1415 fd_p fd = xfd;
1416
1417 TRACE1("[fd%d: turnoff]", fd->fdu);
1418
1419 s = splbio();
1420 /*
1421 * Don't turn off the motor yet if the drive is active.
1422 *
1423 * If we got here, this could only mean we missed an interrupt.
1424 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1425 * after a controller reset. Just schedule a pseudo-interrupt
1426 * so the state machine gets re-entered.
1427 */
1428 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1429 fdc_intr(fd->fdc);
1430 splx(s);
1431 return;
1432 }
1433
1434 fd->flags &= ~FD_MOTOR;
1435 set_motor(fd->fdc, fd->fdsu, TURNOFF);
1436 splx(s);
1437 }
1438
1439 static void
1440 fd_motor_on(void *xfd)
1441 {
1442 int s;
1443 fd_p fd = xfd;
1444
1445 s = splbio();
1446 fd->flags &= ~FD_MOTOR_WAIT;
1447 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1448 {
1449 fdc_intr(fd->fdc);
1450 }
1451 splx(s);
1452 }
1453
1454 static void
1455 fd_turnon(fd_p fd)
1456 {
1457 if(!(fd->flags & FD_MOTOR))
1458 {
1459 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1460 set_motor(fd->fdc, fd->fdsu, TURNON);
1461 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */
1462 }
1463 }
1464
1465 static void
1466 fdc_reset(fdc_p fdc)
1467 {
1468 /* Try a reset, keep motor on */
1469 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1470 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1471 DELAY(100);
1472 /* enable FDC, but defer interrupts a moment */
1473 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1474 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1475 DELAY(100);
1476 fdout_wr(fdc, fdc->fdout);
1477 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1478
1479 /* XXX after a reset, silently believe the FDC will accept commands */
1480 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1481 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1482 0);
1483 if (fdc->flags & FDC_HAS_FIFO)
1484 (void) enable_fifo(fdc);
1485 }
1486
1487 /*
1488 * FDC IO functions, take care of the main status register, timeout
1489 * in case the desired status bits are never set.
1490 *
1491 * These PIO loops initially start out with short delays between
1492 * each iteration in the expectation that the required condition
1493 * is usually met quickly, so it can be handled immediately. After
1494 * about 1 ms, stepping is increased to achieve a better timing
1495 * accuracy in the calls to DELAY().
1496 */
1497 static int
1498 fd_in(struct fdc_data *fdc, int *ptr)
1499 {
1500 int i, j, step;
1501
1502 for (j = 0, step = 1;
1503 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1504 j < FDSTS_TIMEOUT;
1505 j += step) {
1506 if (i == NE7_RQM)
1507 return (fdc_err(fdc, "ready for output in input\n"));
1508 if (j == 1000)
1509 step = 1000;
1510 DELAY(step);
1511 }
1512 if (j >= FDSTS_TIMEOUT)
1513 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1514 #ifdef FDC_DEBUG
1515 i = fddata_rd(fdc);
1516 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1517 *ptr = i;
1518 return (0);
1519 #else /* !FDC_DEBUG */
1520 i = fddata_rd(fdc);
1521 if (ptr)
1522 *ptr = i;
1523 return (0);
1524 #endif /* FDC_DEBUG */
1525 }
1526
1527 static int
1528 out_fdc(struct fdc_data *fdc, int x)
1529 {
1530 int i, j, step;
1531
1532 for (j = 0, step = 1;
1533 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1534 j < FDSTS_TIMEOUT;
1535 j += step) {
1536 if (i == (NE7_DIO|NE7_RQM))
1537 return (fdc_err(fdc, "ready for input in output\n"));
1538 if (j == 1000)
1539 step = 1000;
1540 DELAY(step);
1541 }
1542 if (j >= FDSTS_TIMEOUT)
1543 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1544
1545 /* Send the command and return */
1546 fddata_wr(fdc, x);
1547 TRACE1("[0x%x->FDDATA]", x);
1548 return (0);
1549 }
1550
1551 /*
1552 * Block device driver interface functions (interspersed with even more
1553 * auxiliary functions).
1554 */
1555 static int
1556 Fdopen(dev_t dev, int flags, int mode, struct thread *td)
1557 {
1558 fdu_t fdu = FDUNIT(minor(dev));
1559 int type = FDTYPE(minor(dev));
1560 fd_p fd;
1561 fdc_p fdc;
1562 int rv, unitattn, dflags;
1563
1564 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1565 return (ENXIO);
1566 fdc = fd->fdc;
1567 if ((fdc == NULL) || (fd->type == FDT_NONE))
1568 return (ENXIO);
1569 if (type > NUMDENS)
1570 return (ENXIO);
1571 dflags = device_get_flags(fd->dev);
1572 /*
1573 * This is a bit bogus. It's still possible that e. g. a
1574 * descriptor gets inherited to a child, but then it's at
1575 * least for the same subdevice. By checking FD_OPEN here, we
1576 * can ensure that a device isn't attempted to be opened with
1577 * different densities at the same time where the second open
1578 * could clobber the settings from the first one.
1579 */
1580 if (fd->flags & FD_OPEN)
1581 return (EBUSY);
1582
1583 if (type == 0) {
1584 if (flags & FNONBLOCK) {
1585 /*
1586 * Unfortunately, physio(9) discards its ioflag
1587 * argument, thus preventing us from seeing the
1588 * IO_NDELAY bit. So we need to keep track
1589 * ourselves.
1590 */
1591 fd->flags |= FD_NONBLOCK;
1592 fd->ft = 0;
1593 } else {
1594 /*
1595 * Figure out a unit attention condition.
1596 *
1597 * If UA has been forced, proceed.
1598 *
1599 * If motor is off, turn it on for a moment
1600 * and select our drive, in order to read the
1601 * UA hardware signal.
1602 *
1603 * If motor is on, and our drive is currently
1604 * selected, just read the hardware bit.
1605 *
1606 * If motor is on, but active for another
1607 * drive on that controller, we are lost. We
1608 * cannot risk to deselect the other drive, so
1609 * we just assume a forced UA condition to be
1610 * on the safe side.
1611 */
1612 unitattn = 0;
1613 if ((dflags & FD_NO_CHLINE) != 0 ||
1614 (fd->flags & FD_UA) != 0) {
1615 unitattn = 1;
1616 fd->flags &= ~FD_UA;
1617 } else if (fdc->fdout & (FDO_MOEN0 | FDO_MOEN1 |
1618 FDO_MOEN2 | FDO_MOEN3)) {
1619 if ((fdc->fdout & FDO_FDSEL) == fd->fdsu)
1620 unitattn = fdin_rd(fdc) & FDI_DCHG;
1621 else
1622 unitattn = 1;
1623 } else {
1624 set_motor(fdc, fd->fdsu, TURNON);
1625 unitattn = fdin_rd(fdc) & FDI_DCHG;
1626 set_motor(fdc, fd->fdsu, TURNOFF);
1627 }
1628 if (unitattn && (rv = fdautoselect(dev)) != 0)
1629 return (rv);
1630 }
1631 } else {
1632 fd->ft = fd->fts + type;
1633 }
1634 fd->flags |= FD_OPEN;
1635 /*
1636 * Clearing the DMA overrun counter at open time is a bit messy.
1637 * Since we're only managing one counter per controller, opening
1638 * the second drive could mess it up. Anyway, if the DMA overrun
1639 * condition is really persistent, it will eventually time out
1640 * still. OTOH, clearing it here will ensure we'll at least start
1641 * trying again after a previous (maybe even long ago) failure.
1642 * Also, this is merely a stop-gap measure only that should not
1643 * happen during normal operation, so we can tolerate it to be a
1644 * bit sloppy about this.
1645 */
1646 fdc->dma_overruns = 0;
1647
1648 return 0;
1649 }
1650
1651 static int
1652 fdclose(dev_t dev, int flags, int mode, struct thread *td)
1653 {
1654 fdu_t fdu = FDUNIT(minor(dev));
1655 struct fd_data *fd;
1656
1657 fd = devclass_get_softc(fd_devclass, fdu);
1658 fd->flags &= ~(FD_OPEN | FD_NONBLOCK);
1659 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR);
1660
1661 return (0);
1662 }
1663
1664 static void
1665 fdstrategy(struct bio *bp)
1666 {
1667 long blknum, nblocks;
1668 int s;
1669 fdu_t fdu;
1670 fdc_p fdc;
1671 fd_p fd;
1672 size_t fdblk;
1673
1674 fdu = FDUNIT(minor(bp->bio_dev));
1675 fd = devclass_get_softc(fd_devclass, fdu);
1676 if (fd == 0)
1677 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1678 (u_long)major(bp->bio_dev), (u_long)minor(bp->bio_dev));
1679 fdc = fd->fdc;
1680 if (fd->type == FDT_NONE || fd->ft == 0) {
1681 bp->bio_error = ENXIO;
1682 bp->bio_flags |= BIO_ERROR;
1683 goto bad;
1684 }
1685 fdblk = 128 << (fd->ft->secsize);
1686 if (bp->bio_cmd != FDBIO_FORMAT && bp->bio_cmd != FDBIO_RDSECTID) {
1687 if (fd->flags & FD_NONBLOCK) {
1688 bp->bio_error = EAGAIN;
1689 bp->bio_flags |= BIO_ERROR;
1690 goto bad;
1691 }
1692 if (bp->bio_blkno < 0) {
1693 printf(
1694 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
1695 fdu, (u_long)bp->bio_blkno, bp->bio_bcount);
1696 bp->bio_error = EINVAL;
1697 bp->bio_flags |= BIO_ERROR;
1698 goto bad;
1699 }
1700 if ((bp->bio_bcount % fdblk) != 0) {
1701 bp->bio_error = EINVAL;
1702 bp->bio_flags |= BIO_ERROR;
1703 goto bad;
1704 }
1705 }
1706
1707 /*
1708 * Set up block calculations.
1709 */
1710 if (bp->bio_blkno > 20000000) {
1711 /*
1712 * Reject unreasonably high block number, prevent the
1713 * multiplication below from overflowing.
1714 */
1715 bp->bio_error = EINVAL;
1716 bp->bio_flags |= BIO_ERROR;
1717 goto bad;
1718 }
1719 blknum = bp->bio_blkno * DEV_BSIZE / fdblk;
1720 nblocks = fd->ft->size;
1721 if (blknum + bp->bio_bcount / fdblk > nblocks) {
1722 if (blknum >= nblocks) {
1723 if (bp->bio_cmd == BIO_READ)
1724 bp->bio_resid = bp->bio_bcount;
1725 else {
1726 bp->bio_error = ENOSPC;
1727 bp->bio_flags |= BIO_ERROR;
1728 }
1729 goto bad; /* not always bad, but EOF */
1730 }
1731 bp->bio_bcount = (nblocks - blknum) * fdblk;
1732 }
1733 bp->bio_pblkno = blknum;
1734 s = splbio();
1735 bioqdisksort(&fdc->head, bp);
1736 untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */
1737 devstat_start_transaction(&fd->device_stats);
1738 device_busy(fd->dev);
1739 fdstart(fdc);
1740 splx(s);
1741 return;
1742
1743 bad:
1744 biodone(bp);
1745 }
1746
1747 /*
1748 * fdstart
1749 *
1750 * We have just queued something. If the controller is not busy
1751 * then simulate the case where it has just finished a command
1752 * So that it (the interrupt routine) looks on the queue for more
1753 * work to do and picks up what we just added.
1754 *
1755 * If the controller is already busy, we need do nothing, as it
1756 * will pick up our work when the present work completes.
1757 */
1758 static void
1759 fdstart(struct fdc_data *fdc)
1760 {
1761 int s;
1762
1763 s = splbio();
1764 if(fdc->state == DEVIDLE)
1765 {
1766 fdc_intr(fdc);
1767 }
1768 splx(s);
1769 }
1770
1771 static void
1772 fd_iotimeout(void *xfdc)
1773 {
1774 fdc_p fdc;
1775 int s;
1776
1777 fdc = xfdc;
1778 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1779
1780 /*
1781 * Due to IBM's brain-dead design, the FDC has a faked ready
1782 * signal, hardwired to ready == true. Thus, any command
1783 * issued if there's no diskette in the drive will _never_
1784 * complete, and must be aborted by resetting the FDC.
1785 * Many thanks, Big Blue!
1786 * The FDC must not be reset directly, since that would
1787 * interfere with the state machine. Instead, pretend that
1788 * the command completed but was invalid. The state machine
1789 * will reset the FDC and retry once.
1790 */
1791 s = splbio();
1792 fdc->status[0] = NE7_ST0_IC_IV;
1793 fdc->flags &= ~FDC_STAT_VALID;
1794 fdc->state = IOTIMEDOUT;
1795 fdc_intr(fdc);
1796 splx(s);
1797 }
1798
1799 /* Just ensure it has the right spl. */
1800 static void
1801 fd_pseudointr(void *xfdc)
1802 {
1803 int s;
1804
1805 s = splbio();
1806 fdc_intr(xfdc);
1807 splx(s);
1808 }
1809
1810 /*
1811 * fdc_intr
1812 *
1813 * Keep calling the state machine until it returns a 0.
1814 * Always called at splbio.
1815 */
1816 static void
1817 fdc_intr(void *xfdc)
1818 {
1819 fdc_p fdc = xfdc;
1820 while(fdstate(fdc))
1821 ;
1822 }
1823
1824 /*
1825 * Magic pseudo-DMA initialization for YE FDC. Sets count and
1826 * direction.
1827 */
1828 #define SET_BCDR(fdc,wr,cnt,port) \
1829 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1830 ((cnt)-1) & 0xff); \
1831 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1832 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1833
1834 /*
1835 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy.
1836 */
1837 static int
1838 fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count)
1839 {
1840 u_char *cptr = (u_char *)addr;
1841
1842 if (flags == BIO_READ) {
1843 if (fdc->state != PIOREAD) {
1844 fdc->state = PIOREAD;
1845 return(0);
1846 }
1847 SET_BCDR(fdc, 0, count, 0);
1848 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1849 FDC_YE_DATAPORT, cptr, count);
1850 } else {
1851 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1852 FDC_YE_DATAPORT, cptr, count);
1853 SET_BCDR(fdc, 0, count, 0);
1854 }
1855 return(1);
1856 }
1857
1858 /*
1859 * Try figuring out the density of the media present in our device.
1860 */
1861 static int
1862 fdautoselect(dev_t dev)
1863 {
1864 fdu_t fdu;
1865 fd_p fd;
1866 struct fd_type *fdtp;
1867 struct fdc_readid id;
1868 int i, n, oopts, rv;
1869
1870 fdu = FDUNIT(minor(dev));
1871 fd = devclass_get_softc(fd_devclass, fdu);
1872
1873 switch (fd->type) {
1874 default:
1875 return (ENXIO);
1876
1877 case FDT_360K:
1878 case FDT_720K:
1879 /* no autoselection on those drives */
1880 fd->ft = fd_native_types + fd->type;
1881 return (0);
1882
1883 case FDT_12M:
1884 fdtp = fd_searchlist_12m;
1885 n = sizeof fd_searchlist_12m / sizeof(struct fd_type);
1886 break;
1887
1888 case FDT_144M:
1889 fdtp = fd_searchlist_144m;
1890 n = sizeof fd_searchlist_144m / sizeof(struct fd_type);
1891 break;
1892
1893 case FDT_288M:
1894 fdtp = fd_searchlist_288m;
1895 n = sizeof fd_searchlist_288m / sizeof(struct fd_type);
1896 break;
1897 }
1898
1899 /*
1900 * Try reading sector ID fields, first at cylinder 0, head 0,
1901 * then at cylinder 2, head N. We don't probe cylinder 1,
1902 * since for 5.25in DD media in a HD drive, there are no data
1903 * to read (2 step pulses per media cylinder required). For
1904 * two-sided media, the second probe always goes to head 1, so
1905 * we can tell them apart from single-sided media. As a
1906 * side-effect this means that single-sided media should be
1907 * mentioned in the search list after two-sided media of an
1908 * otherwise identical density. Media with a different number
1909 * of sectors per track but otherwise identical parameters
1910 * cannot be distinguished at all.
1911 *
1912 * If we successfully read an ID field on both cylinders where
1913 * the recorded values match our expectation, we are done.
1914 * Otherwise, we try the next density entry from the table.
1915 *
1916 * Stepping to cylinder 2 has the side-effect of clearing the
1917 * unit attention bit.
1918 */
1919 oopts = fd->options;
1920 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
1921 for (i = 0; i < n; i++, fdtp++) {
1922 fd->ft = fdtp;
1923
1924 id.cyl = id.head = 0;
1925 rv = fdmisccmd(dev, FDBIO_RDSECTID, &id);
1926 if (rv != 0)
1927 continue;
1928 if (id.cyl != 0 || id.head != 0 ||
1929 id.secshift != fdtp->secsize)
1930 continue;
1931 id.cyl = 2;
1932 id.head = fd->ft->heads - 1;
1933 rv = fdmisccmd(dev, FDBIO_RDSECTID, &id);
1934 if (id.cyl != 2 || id.head != fdtp->heads - 1 ||
1935 id.secshift != fdtp->secsize)
1936 continue;
1937 if (rv == 0)
1938 break;
1939 }
1940
1941 fd->options = oopts;
1942 if (i == n) {
1943 if (bootverbose)
1944 device_printf(fd->dev, "autoselection failed\n");
1945 fd->ft = 0;
1946 return (EIO);
1947 } else {
1948 if (bootverbose)
1949 device_printf(fd->dev, "autoselected %d KB medium\n",
1950 fd->ft->size / 2);
1951 return (0);
1952 }
1953 }
1954
1955
1956 /*
1957 * The controller state machine.
1958 *
1959 * If it returns a non zero value, it should be called again immediately.
1960 */
1961 static int
1962 fdstate(fdc_p fdc)
1963 {
1964 struct fdc_readid *idp;
1965 int read, format, rdsectid, cylinder, head, i, sec = 0, sectrac;
1966 int st0, cyl, st3, idf, ne7cmd, mfm, steptrac;
1967 unsigned long blknum;
1968 fdu_t fdu = fdc->fdu;
1969 fd_p fd;
1970 register struct bio *bp;
1971 struct fd_formb *finfo = NULL;
1972 size_t fdblk;
1973
1974 bp = fdc->bp;
1975 if (bp == NULL) {
1976 bp = bioq_first(&fdc->head);
1977 if (bp != NULL) {
1978 bioq_remove(&fdc->head, bp);
1979 fdc->bp = bp;
1980 }
1981 }
1982 if (bp == NULL) {
1983 /*
1984 * Nothing left for this controller to do,
1985 * force into the IDLE state.
1986 */
1987 fdc->state = DEVIDLE;
1988 if (fdc->fd) {
1989 device_printf(fdc->fdc_dev,
1990 "unexpected valid fd pointer\n");
1991 fdc->fd = (fd_p) 0;
1992 fdc->fdu = -1;
1993 }
1994 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1995 return (0);
1996 }
1997 fdu = FDUNIT(minor(bp->bio_dev));
1998 fd = devclass_get_softc(fd_devclass, fdu);
1999 fdblk = 128 << fd->ft->secsize;
2000 if (fdc->fd && (fd != fdc->fd))
2001 device_printf(fd->dev, "confused fd pointers\n");
2002 read = bp->bio_cmd == BIO_READ;
2003 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0;
2004 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1;
2005 if (read)
2006 idf = ISADMA_READ;
2007 else
2008 idf = ISADMA_WRITE;
2009 format = bp->bio_cmd == FDBIO_FORMAT;
2010 rdsectid = bp->bio_cmd == FDBIO_RDSECTID;
2011 if (format)
2012 finfo = (struct fd_formb *)bp->bio_data;
2013 TRACE1("fd%d", fdu);
2014 TRACE1("[%s]", fdstates[fdc->state]);
2015 TRACE1("(0x%x)", fd->flags);
2016 untimeout(fd_turnoff, fd, fd->toffhandle);
2017 fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz);
2018 switch (fdc->state)
2019 {
2020 case DEVIDLE:
2021 case FINDWORK: /* we have found new work */
2022 fdc->retry = 0;
2023 fd->skip = 0;
2024 fdc->fd = fd;
2025 fdc->fdu = fdu;
2026 fdc->fdctl_wr(fdc, fd->ft->trans);
2027 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
2028 /*
2029 * If the next drive has a motor startup pending, then
2030 * it will start up in its own good time.
2031 */
2032 if(fd->flags & FD_MOTOR_WAIT) {
2033 fdc->state = MOTORWAIT;
2034 return (0); /* will return later */
2035 }
2036 /*
2037 * Maybe if it's not starting, it SHOULD be starting.
2038 */
2039 if (!(fd->flags & FD_MOTOR))
2040 {
2041 fdc->state = MOTORWAIT;
2042 fd_turnon(fd);
2043 return (0); /* will return later */
2044 }
2045 else /* at least make sure we are selected */
2046 {
2047 set_motor(fdc, fd->fdsu, TURNON);
2048 }
2049 if (fdc->flags & FDC_NEEDS_RESET) {
2050 fdc->state = RESETCTLR;
2051 fdc->flags &= ~FDC_NEEDS_RESET;
2052 } else
2053 fdc->state = DOSEEK;
2054 return (1); /* will return immediately */
2055
2056 case DOSEEK:
2057 blknum = bp->bio_pblkno + fd->skip / fdblk;
2058 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
2059 if (cylinder == fd->track)
2060 {
2061 fdc->state = SEEKCOMPLETE;
2062 return (1); /* will return immediately */
2063 }
2064 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
2065 fd->fdsu, cylinder * steptrac, 0))
2066 {
2067 /*
2068 * Seek command not accepted, looks like
2069 * the FDC went off to the Saints...
2070 */
2071 fdc->retry = 6; /* try a reset */
2072 return(retrier(fdc));
2073 }
2074 fd->track = FD_NO_TRACK;
2075 fdc->state = SEEKWAIT;
2076 return(0); /* will return later */
2077
2078 case SEEKWAIT:
2079 /* allow heads to settle */
2080 timeout(fd_pseudointr, fdc, hz / 16);
2081 fdc->state = SEEKCOMPLETE;
2082 return(0); /* will return later */
2083
2084 case SEEKCOMPLETE : /* seek done, start DMA */
2085 blknum = bp->bio_pblkno + fd->skip / fdblk;
2086 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
2087
2088 /* Make sure seek really happened. */
2089 if(fd->track == FD_NO_TRACK) {
2090 int descyl = cylinder * steptrac;
2091 do {
2092 /*
2093 * This might be a "ready changed" interrupt,
2094 * which cannot really happen since the
2095 * RDY pin is hardwired to + 5 volts. This
2096 * generally indicates a "bouncing" intr
2097 * line, so do one of the following:
2098 *
2099 * When running on an enhanced FDC that is
2100 * known to not go stuck after responding
2101 * with INVALID, fetch all interrupt states
2102 * until seeing either an INVALID or a
2103 * real interrupt condition.
2104 *
2105 * When running on a dumb old NE765, give
2106 * up immediately. The controller will
2107 * provide up to four dummy RC interrupt
2108 * conditions right after reset (for the
2109 * corresponding four drives), so this is
2110 * our only chance to get notice that it
2111 * was not the FDC that caused the interrupt.
2112 */
2113 if (fd_sense_int(fdc, &st0, &cyl)
2114 == FD_NOT_VALID)
2115 return (0); /* will return later */
2116 if(fdc->fdct == FDC_NE765
2117 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2118 return (0); /* hope for a real intr */
2119 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2120
2121 if (0 == descyl) {
2122 int failed = 0;
2123 /*
2124 * seek to cyl 0 requested; make sure we are
2125 * really there
2126 */
2127 if (fd_sense_drive_status(fdc, &st3))
2128 failed = 1;
2129 if ((st3 & NE7_ST3_T0) == 0) {
2130 printf(
2131 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
2132 fdu, st3, NE7_ST3BITS);
2133 failed = 1;
2134 }
2135
2136 if (failed) {
2137 if(fdc->retry < 3)
2138 fdc->retry = 3;
2139 return (retrier(fdc));
2140 }
2141 }
2142
2143 if (cyl != descyl) {
2144 printf(
2145 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
2146 fdu, descyl, cyl, st0);
2147 if (fdc->retry < 3)
2148 fdc->retry = 3;
2149 return (retrier(fdc));
2150 }
2151 }
2152
2153 fd->track = cylinder;
2154 if (format)
2155 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
2156 - (char *)finfo;
2157 if (!rdsectid && !(fdc->flags & FDC_NODMA))
2158 isa_dmastart(idf, bp->bio_data+fd->skip,
2159 format ? bp->bio_bcount : fdblk, fdc->dmachan);
2160 blknum = bp->bio_pblkno + fd->skip / fdblk;
2161 sectrac = fd->ft->sectrac;
2162 sec = blknum % (sectrac * fd->ft->heads);
2163 head = sec / sectrac;
2164 sec = sec % sectrac + 1;
2165 if (head != 0 && fd->ft->offset_side2 != 0)
2166 sec += fd->ft->offset_side2;
2167 fd->hddrv = ((head&1)<<2)+fdu;
2168
2169 if(format || !(read || rdsectid))
2170 {
2171 /* make sure the drive is writable */
2172 if(fd_sense_drive_status(fdc, &st3) != 0)
2173 {
2174 /* stuck controller? */
2175 if (!(fdc->flags & FDC_NODMA))
2176 isa_dmadone(idf,
2177 bp->bio_data + fd->skip,
2178 format ? bp->bio_bcount : fdblk,
2179 fdc->dmachan);
2180 fdc->retry = 6; /* reset the beast */
2181 return (retrier(fdc));
2182 }
2183 if(st3 & NE7_ST3_WP)
2184 {
2185 /*
2186 * XXX YES! this is ugly.
2187 * in order to force the current operation
2188 * to fail, we will have to fake an FDC
2189 * error - all error handling is done
2190 * by the retrier()
2191 */
2192 fdc->status[0] = NE7_ST0_IC_AT;
2193 fdc->status[1] = NE7_ST1_NW;
2194 fdc->status[2] = 0;
2195 fdc->status[3] = fd->track;
2196 fdc->status[4] = head;
2197 fdc->status[5] = sec;
2198 fdc->retry = 8; /* break out immediately */
2199 fdc->state = IOTIMEDOUT; /* not really... */
2200 return (1); /* will return immediately */
2201 }
2202 }
2203
2204 if (format) {
2205 ne7cmd = NE7CMD_FORMAT | mfm;
2206 if (fdc->flags & FDC_NODMA) {
2207 /*
2208 * This seems to be necessary for
2209 * whatever obscure reason; if we omit
2210 * it, we end up filling the sector ID
2211 * fields of the newly formatted track
2212 * entirely with garbage, causing
2213 * `wrong cylinder' errors all over
2214 * the place when trying to read them
2215 * back.
2216 *
2217 * Umpf.
2218 */
2219 SET_BCDR(fdc, 1, bp->bio_bcount, 0);
2220
2221 (void)fdcpio(fdc,bp->bio_cmd,
2222 bp->bio_data+fd->skip,
2223 bp->bio_bcount);
2224
2225 }
2226 /* formatting */
2227 if(fd_cmd(fdc, 6, ne7cmd, head << 2 | fdu,
2228 finfo->fd_formb_secshift,
2229 finfo->fd_formb_nsecs,
2230 finfo->fd_formb_gaplen,
2231 finfo->fd_formb_fillbyte, 0)) {
2232 /* controller fell over */
2233 if (!(fdc->flags & FDC_NODMA))
2234 isa_dmadone(idf,
2235 bp->bio_data + fd->skip,
2236 format ? bp->bio_bcount : fdblk,
2237 fdc->dmachan);
2238 fdc->retry = 6;
2239 return (retrier(fdc));
2240 }
2241 } else if (rdsectid) {
2242 ne7cmd = NE7CMD_READID | mfm;
2243 if (fd_cmd(fdc, 2, ne7cmd, head << 2 | fdu, 0)) {
2244 /* controller jamming */
2245 fdc->retry = 6;
2246 return (retrier(fdc));
2247 }
2248 } else {
2249 /* read or write operation */
2250 ne7cmd = (read ? NE7CMD_READ | NE7CMD_SK : NE7CMD_WRITE) | mfm;
2251 if (fdc->flags & FDC_NODMA) {
2252 /*
2253 * This seems to be necessary even when
2254 * reading data.
2255 */
2256 SET_BCDR(fdc, 1, fdblk, 0);
2257
2258 /*
2259 * Perform the write pseudo-DMA before
2260 * the WRITE command is sent.
2261 */
2262 if (!read)
2263 (void)fdcpio(fdc,bp->bio_cmd,
2264 bp->bio_data+fd->skip,
2265 fdblk);
2266 }
2267 if (fd_cmd(fdc, 9,
2268 ne7cmd,
2269 head << 2 | fdu, /* head & unit */
2270 fd->track, /* track */
2271 head,
2272 sec, /* sector + 1 */
2273 fd->ft->secsize, /* sector size */
2274 sectrac, /* sectors/track */
2275 fd->ft->gap, /* gap size */
2276 fd->ft->datalen, /* data length */
2277 0)) {
2278 /* the beast is sleeping again */
2279 if (!(fdc->flags & FDC_NODMA))
2280 isa_dmadone(idf,
2281 bp->bio_data + fd->skip,
2282 format ? bp->bio_bcount : fdblk,
2283 fdc->dmachan);
2284 fdc->retry = 6;
2285 return (retrier(fdc));
2286 }
2287 }
2288 if (!rdsectid && (fdc->flags & FDC_NODMA))
2289 /*
2290 * If this is a read, then simply await interrupt
2291 * before performing PIO.
2292 */
2293 if (read && !fdcpio(fdc,bp->bio_cmd,
2294 bp->bio_data+fd->skip,fdblk)) {
2295 fd->tohandle = timeout(fd_iotimeout, fdc, hz);
2296 return(0); /* will return later */
2297 }
2298
2299 /*
2300 * Write (or format) operation will fall through and
2301 * await completion interrupt.
2302 */
2303 fdc->state = IOCOMPLETE;
2304 fd->tohandle = timeout(fd_iotimeout, fdc, hz);
2305 return (0); /* will return later */
2306
2307 case PIOREAD:
2308 /*
2309 * Actually perform the PIO read. The IOCOMPLETE case
2310 * removes the timeout for us.
2311 */
2312 (void)fdcpio(fdc,bp->bio_cmd,bp->bio_data+fd->skip,fdblk);
2313 fdc->state = IOCOMPLETE;
2314 /* FALLTHROUGH */
2315 case IOCOMPLETE: /* IO done, post-analyze */
2316 untimeout(fd_iotimeout, fdc, fd->tohandle);
2317
2318 if (fd_read_status(fdc)) {
2319 if (!rdsectid && !(fdc->flags & FDC_NODMA))
2320 isa_dmadone(idf, bp->bio_data + fd->skip,
2321 format ? bp->bio_bcount : fdblk,
2322 fdc->dmachan);
2323 if (fdc->retry < 6)
2324 fdc->retry = 6; /* force a reset */
2325 return (retrier(fdc));
2326 }
2327
2328 fdc->state = IOTIMEDOUT;
2329
2330 /* FALLTHROUGH */
2331 case IOTIMEDOUT:
2332 if (!rdsectid && !(fdc->flags & FDC_NODMA))
2333 isa_dmadone(idf, bp->bio_data + fd->skip,
2334 format ? bp->bio_bcount : fdblk, fdc->dmachan);
2335 if (fdc->status[0] & NE7_ST0_IC) {
2336 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2337 && fdc->status[1] & NE7_ST1_OR) {
2338 /*
2339 * DMA overrun. Someone hogged the bus and
2340 * didn't release it in time for the next
2341 * FDC transfer.
2342 *
2343 * We normally restart this without bumping
2344 * the retry counter. However, in case
2345 * something is seriously messed up (like
2346 * broken hardware), we rather limit the
2347 * number of retries so the IO operation
2348 * doesn't block indefinately.
2349 */
2350 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
2351 fdc->state = SEEKCOMPLETE;
2352 return (1);/* will return immediately */
2353 } /* else fall through */
2354 }
2355 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
2356 && fdc->retry < 6)
2357 fdc->retry = 6; /* force a reset */
2358 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2359 && fdc->status[2] & NE7_ST2_WC
2360 && fdc->retry < 3)
2361 fdc->retry = 3; /* force recalibrate */
2362 return (retrier(fdc));
2363 }
2364 /* All OK */
2365 if (rdsectid) {
2366 /* copy out ID field contents */
2367 idp = (struct fdc_readid *)bp->bio_data;
2368 idp->cyl = fdc->status[3];
2369 idp->head = fdc->status[4];
2370 idp->sec = fdc->status[5];
2371 idp->secshift = fdc->status[6];
2372 }
2373 /* Operation successful, retry DMA overruns again next time. */
2374 fdc->dma_overruns = 0;
2375 fd->skip += fdblk;
2376 if (!rdsectid && !format && fd->skip < bp->bio_bcount) {
2377 /* set up next transfer */
2378 fdc->state = DOSEEK;
2379 } else {
2380 /* ALL DONE */
2381 fd->skip = 0;
2382 bp->bio_resid = 0;
2383 fdc->bp = NULL;
2384 device_unbusy(fd->dev);
2385 biofinish(bp, &fd->device_stats, 0);
2386 fdc->fd = (fd_p) 0;
2387 fdc->fdu = -1;
2388 fdc->state = FINDWORK;
2389 }
2390 return (1); /* will return immediately */
2391
2392 case RESETCTLR:
2393 fdc_reset(fdc);
2394 fdc->retry++;
2395 fdc->state = RESETCOMPLETE;
2396 return (0); /* will return later */
2397
2398 case RESETCOMPLETE:
2399 /*
2400 * Discard all the results from the reset so that they
2401 * can't cause an unexpected interrupt later.
2402 */
2403 for (i = 0; i < 4; i++)
2404 (void)fd_sense_int(fdc, &st0, &cyl);
2405 fdc->state = STARTRECAL;
2406 /* FALLTHROUGH */
2407 case STARTRECAL:
2408 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
2409 /* arrgl */
2410 fdc->retry = 6;
2411 return (retrier(fdc));
2412 }
2413 fdc->state = RECALWAIT;
2414 return (0); /* will return later */
2415
2416 case RECALWAIT:
2417 /* allow heads to settle */
2418 timeout(fd_pseudointr, fdc, hz / 8);
2419 fdc->state = RECALCOMPLETE;
2420 return (0); /* will return later */
2421
2422 case RECALCOMPLETE:
2423 do {
2424 /*
2425 * See SEEKCOMPLETE for a comment on this:
2426 */
2427 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2428 return (0); /* will return later */
2429 if(fdc->fdct == FDC_NE765
2430 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2431 return (0); /* hope for a real intr */
2432 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2433 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2434 {
2435 if(fdc->retry > 3)
2436 /*
2437 * A recalibrate from beyond cylinder 77
2438 * will "fail" due to the FDC limitations;
2439 * since people used to complain much about
2440 * the failure message, try not logging
2441 * this one if it seems to be the first
2442 * time in a line.
2443 */
2444 printf("fd%d: recal failed ST0 %b cyl %d\n",
2445 fdu, st0, NE7_ST0BITS, cyl);
2446 if(fdc->retry < 3) fdc->retry = 3;
2447 return (retrier(fdc));
2448 }
2449 fd->track = 0;
2450 /* Seek (probably) necessary */
2451 fdc->state = DOSEEK;
2452 return (1); /* will return immediately */
2453
2454 case MOTORWAIT:
2455 if(fd->flags & FD_MOTOR_WAIT)
2456 {
2457 return (0); /* time's not up yet */
2458 }
2459 if (fdc->flags & FDC_NEEDS_RESET) {
2460 fdc->state = RESETCTLR;
2461 fdc->flags &= ~FDC_NEEDS_RESET;
2462 } else
2463 fdc->state = DOSEEK;
2464 return (1); /* will return immediately */
2465
2466 default:
2467 device_printf(fdc->fdc_dev, "unexpected FD int->");
2468 if (fd_read_status(fdc) == 0)
2469 printf("FDC status :%x %x %x %x %x %x %x ",
2470 fdc->status[0],
2471 fdc->status[1],
2472 fdc->status[2],
2473 fdc->status[3],
2474 fdc->status[4],
2475 fdc->status[5],
2476 fdc->status[6] );
2477 else
2478 printf("No status available ");
2479 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2480 {
2481 printf("[controller is dead now]\n");
2482 return (0); /* will return later */
2483 }
2484 printf("ST0 = %x, PCN = %x\n", st0, cyl);
2485 return (0); /* will return later */
2486 }
2487 /* noone should ever get here */
2488 }
2489
2490 static int
2491 retrier(struct fdc_data *fdc)
2492 {
2493 struct bio *bp;
2494 struct fd_data *fd;
2495 int fdu;
2496
2497 bp = fdc->bp;
2498
2499 /* XXX shouldn't this be cached somewhere? */
2500 fdu = FDUNIT(minor(bp->bio_dev));
2501 fd = devclass_get_softc(fd_devclass, fdu);
2502 if (fd->options & FDOPT_NORETRY)
2503 goto fail;
2504
2505 switch (fdc->retry) {
2506 case 0: case 1: case 2:
2507 fdc->state = SEEKCOMPLETE;
2508 break;
2509 case 3: case 4: case 5:
2510 fdc->state = STARTRECAL;
2511 break;
2512 case 6:
2513 fdc->state = RESETCTLR;
2514 break;
2515 case 7:
2516 break;
2517 default:
2518 fail:
2519 if ((fd->options & FDOPT_NOERRLOG) == 0) {
2520 disk_err(bp, "hard error",
2521 fdc->fd->skip / DEV_BSIZE, 0);
2522 if (fdc->flags & FDC_STAT_VALID) {
2523 printf(
2524 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2525 fdc->status[0], NE7_ST0BITS,
2526 fdc->status[1], NE7_ST1BITS,
2527 fdc->status[2], NE7_ST2BITS,
2528 fdc->status[3], fdc->status[4],
2529 fdc->status[5]);
2530 }
2531 else
2532 printf(" (No status)\n");
2533 }
2534 if ((fd->options & FDOPT_NOERROR) == 0) {
2535 bp->bio_flags |= BIO_ERROR;
2536 bp->bio_error = EIO;
2537 bp->bio_resid = bp->bio_bcount - fdc->fd->skip;
2538 } else
2539 bp->bio_resid = 0;
2540 fdc->bp = NULL;
2541 fdc->fd->skip = 0;
2542 device_unbusy(fd->dev);
2543 biofinish(bp, &fdc->fd->device_stats, 0);
2544 fdc->state = FINDWORK;
2545 fdc->flags |= FDC_NEEDS_RESET;
2546 fdc->fd = (fd_p) 0;
2547 fdc->fdu = -1;
2548 return (1);
2549 }
2550 fdc->retry++;
2551 return (1);
2552 }
2553
2554 static void
2555 fdbiodone(struct bio *bp)
2556 {
2557 wakeup(bp);
2558 }
2559
2560 static int
2561 fdmisccmd(dev_t dev, u_int cmd, void *data)
2562 {
2563 fdu_t fdu;
2564 fd_p fd;
2565 struct bio *bp;
2566 struct fd_formb *finfo;
2567 struct fdc_readid *idfield;
2568 size_t fdblk;
2569 int error;
2570
2571 fdu = FDUNIT(minor(dev));
2572 fd = devclass_get_softc(fd_devclass, fdu);
2573 fdblk = 128 << fd->ft->secsize;
2574 finfo = (struct fd_formb *)data;
2575 idfield = (struct fdc_readid *)data;
2576
2577 bp = malloc(sizeof(struct bio), M_TEMP, M_ZERO);
2578
2579 /*
2580 * Set up a bio request for fdstrategy(). bio_blkno is faked
2581 * so that fdstrategy() will seek to the the requested
2582 * cylinder, and use the desired head.
2583 */
2584 bp->bio_cmd = cmd;
2585 if (cmd == FDBIO_FORMAT) {
2586 bp->bio_blkno =
2587 (finfo->cyl * (fd->ft->sectrac * fd->ft->heads) +
2588 finfo->head * fd->ft->sectrac) *
2589 fdblk / DEV_BSIZE;
2590 bp->bio_bcount = sizeof(struct fd_idfield_data) *
2591 finfo->fd_formb_nsecs;
2592 } else if (cmd == FDBIO_RDSECTID) {
2593 bp->bio_blkno =
2594 (idfield->cyl * (fd->ft->sectrac * fd->ft->heads) +
2595 idfield->head * fd->ft->sectrac) *
2596 fdblk / DEV_BSIZE;
2597 bp->bio_bcount = sizeof(struct fdc_readid);
2598 } else
2599 panic("wrong cmd in fdmisccmd()");
2600 bp->bio_data = data;
2601 bp->bio_dev = dev;
2602 bp->bio_done = fdbiodone;
2603 bp->bio_flags = 0;
2604
2605 /* Now run the command. */
2606 fdstrategy(bp);
2607 error = biowait(bp, "fdcmd");
2608
2609 free(bp, M_TEMP);
2610 return (error);
2611 }
2612
2613 static int
2614 fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
2615 {
2616 fdu_t fdu;
2617 fd_p fd;
2618 struct fdc_status *fsp;
2619 struct fdc_readid *rid;
2620 size_t fdblk;
2621 int error, type;
2622
2623 fdu = FDUNIT(minor(dev));
2624 type = FDTYPE(minor(dev));
2625 fd = devclass_get_softc(fd_devclass, fdu);
2626
2627 /*
2628 * First, handle everything that could be done with
2629 * FD_NONBLOCK still being set.
2630 */
2631 switch (cmd) {
2632
2633 case DIOCGMEDIASIZE:
2634 *(off_t *)addr = (128 << (fd->ft->secsize)) * fd->ft->size;
2635 return (0);
2636
2637 case DIOCGSECTORSIZE:
2638 *(u_int *)addr = 128 << (fd->ft->secsize);
2639 return (0);
2640
2641 case FIONBIO:
2642 if (*(int *)addr != 0)
2643 fd->flags |= FD_NONBLOCK;
2644 else {
2645 if (fd->ft == 0) {
2646 /*
2647 * No drive type has been selected yet,
2648 * cannot turn FNONBLOCK off.
2649 */
2650 return (EINVAL);
2651 }
2652 fd->flags &= ~FD_NONBLOCK;
2653 }
2654 return (0);
2655
2656 case FIOASYNC:
2657 /* keep the generic fcntl() code happy */
2658 return (0);
2659
2660 case FD_GTYPE: /* get drive type */
2661 if (fd->ft == 0)
2662 /* no type known yet, return the native type */
2663 *(struct fd_type *)addr = fd_native_types[fd->type];
2664 else
2665 *(struct fd_type *)addr = *fd->ft;
2666 return (0);
2667
2668 case FD_STYPE: /* set drive type */
2669 if (type == 0) {
2670 /*
2671 * Allow setting drive type temporarily iff
2672 * currently unset. Used for fdformat so any
2673 * user can set it, and then start formatting.
2674 */
2675 if (fd->ft)
2676 return (EINVAL); /* already set */
2677 fd->ft = fd->fts;
2678 *fd->ft = *(struct fd_type *)addr;
2679 fd->flags |= FD_UA;
2680 } else {
2681 /*
2682 * Set density definition permanently. Only
2683 * allow for superuser.
2684 */
2685 if (suser(td) != 0)
2686 return (EPERM);
2687 fd->fts[type] = *(struct fd_type *)addr;
2688 }
2689 return (0);
2690
2691 case FD_GOPTS: /* get drive options */
2692 *(int *)addr = fd->options + (type == 0? FDOPT_AUTOSEL: 0);
2693 return (0);
2694
2695 case FD_SOPTS: /* set drive options */
2696 fd->options = *(int *)addr & ~FDOPT_AUTOSEL;
2697 return (0);
2698
2699 #ifdef FDC_DEBUG
2700 case FD_DEBUG:
2701 if ((fd_debug != 0) != (*(int *)addr != 0)) {
2702 fd_debug = (*(int *)addr != 0);
2703 printf("fd%d: debugging turned %s\n",
2704 fd->fdu, fd_debug ? "on" : "off");
2705 }
2706 return (0);
2707 #endif
2708
2709 case FD_CLRERR:
2710 if (suser(td) != 0)
2711 return (EPERM);
2712 fd->fdc->fdc_errs = 0;
2713 return (0);
2714
2715 case FD_GSTAT:
2716 fsp = (struct fdc_status *)addr;
2717 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2718 return (EINVAL);
2719 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2720 return (0);
2721
2722 case FD_GDTYPE:
2723 *(enum fd_drivetype *)addr = fd->type;
2724 return (0);
2725 }
2726
2727 /*
2728 * Now handle everything else. Make sure we have a valid
2729 * drive type.
2730 */
2731 if (fd->flags & FD_NONBLOCK)
2732 return (EAGAIN);
2733 if (fd->ft == 0)
2734 return (ENXIO);
2735 fdblk = 128 << fd->ft->secsize;
2736 error = 0;
2737
2738 switch (cmd) {
2739
2740 case FD_FORM:
2741 if ((flag & FWRITE) == 0)
2742 return (EBADF); /* must be opened for writing */
2743 if (((struct fd_formb *)addr)->format_version !=
2744 FD_FORMAT_VERSION)
2745 return (EINVAL); /* wrong version of formatting prog */
2746 error = fdmisccmd(dev, FDBIO_FORMAT, addr);
2747 break;
2748
2749 case FD_GTYPE: /* get drive type */
2750 *(struct fd_type *)addr = *fd->ft;
2751 break;
2752
2753 case FD_STYPE: /* set drive type */
2754 /* this is considered harmful; only allow for superuser */
2755 if (suser(td) != 0)
2756 return (EPERM);
2757 *fd->ft = *(struct fd_type *)addr;
2758 break;
2759
2760 case FD_GOPTS: /* get drive options */
2761 *(int *)addr = fd->options;
2762 break;
2763
2764 case FD_SOPTS: /* set drive options */
2765 fd->options = *(int *)addr;
2766 break;
2767
2768 #ifdef FDC_DEBUG
2769 case FD_DEBUG:
2770 if ((fd_debug != 0) != (*(int *)addr != 0)) {
2771 fd_debug = (*(int *)addr != 0);
2772 printf("fd%d: debugging turned %s\n",
2773 fd->fdu, fd_debug ? "on" : "off");
2774 }
2775 break;
2776 #endif
2777
2778 case FD_CLRERR:
2779 if (suser(td) != 0)
2780 return (EPERM);
2781 fd->fdc->fdc_errs = 0;
2782 break;
2783
2784 case FD_GSTAT:
2785 fsp = (struct fdc_status *)addr;
2786 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2787 return (EINVAL);
2788 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2789 break;
2790
2791 case FD_READID:
2792 rid = (struct fdc_readid *)addr;
2793 if (rid->cyl > MAX_CYLINDER || rid->head > MAX_HEAD)
2794 return (EINVAL);
2795 error = fdmisccmd(dev, FDBIO_RDSECTID, addr);
2796 break;
2797
2798 default:
2799 error = ENOTTY;
2800 break;
2801 }
2802 return (error);
2803 }
Cache object: cf37fbdb13f82cc1eadee5dd58fd4354
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