timeout/untimeout ==> callout_*
[dragonfly.git] / sys / dev / disk / fd / fd.c
CommitLineData
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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.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: src/sys/isa/fd.c,v 1.176.2.8 2002/05/15 21:56:14 joerg Exp $
e8b273ff 54 * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.18 2004/09/18 18:44:41 dillon Exp $
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55 *
56 */
57
58#include "opt_fdc.h"
666d2603 59#include "use_pccard.h"
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60
61#include <sys/param.h>
62#include <sys/systm.h>
fabb8ceb 63#include <sys/bootmaj.h>
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64#include <sys/kernel.h>
65#include <sys/buf.h>
66#include <sys/bus.h>
67#include <sys/conf.h>
68#include <sys/disklabel.h>
69#include <sys/devicestat.h>
70#include <sys/fcntl.h>
71#include <sys/malloc.h>
72#include <sys/module.h>
73#include <sys/proc.h>
74#include <sys/syslog.h>
335dda38 75#include <sys/device.h>
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76
77#include <sys/bus.h>
78#include <machine/bus.h>
79#include <sys/rman.h>
80
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81#include <sys/buf2.h>
82
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83#include <machine/clock.h>
84#include <machine/ioctl_fd.h>
85#include <machine/resource.h>
86#include <machine/stdarg.h>
87
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88#include <bus/isa/isavar.h>
89#include <bus/isa/isareg.h>
90#include "fdreg.h"
91#include "fdc.h"
92#include <bus/isa/rtc.h>
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93
94/* misuse a flag to identify format operation */
95#define B_FORMAT B_XXX
96
97/* configuration flags */
98#define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
99#define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
100
101/* internally used only, not really from CMOS: */
102#define RTCFDT_144M_PRETENDED 0x1000
103
104/* error returns for fd_cmd() */
105#define FD_FAILED -1
106#define FD_NOT_VALID -2
107#define FDC_ERRMAX 100 /* do not log more */
108/*
109 * Stop retrying after this many DMA overruns. Since each retry takes
110 * one revolution, with 300 rpm., 25 retries take approximately 10
111 * seconds which the read attempt will block in case the DMA overrun
112 * is persistent.
113 */
114#define FDC_DMAOV_MAX 25
115
116/*
117 * Timeout value for the PIO loops to wait until the FDC main status
118 * register matches our expectations (request for master, direction
119 * bit). This is supposed to be a number of microseconds, although
120 * timing might actually not be very accurate.
121 *
122 * Timeouts of 100 msec are believed to be required for some broken
123 * (old) hardware.
124 */
125#define FDSTS_TIMEOUT 100000
126
127#define NUMTYPES 17
128#define NUMDENS (NUMTYPES - 7)
129
130/* These defines (-1) must match index for fd_types */
131#define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
132#define NO_TYPE 0 /* must match NO_TYPE in ft.c */
133#define FD_1720 1
134#define FD_1480 2
135#define FD_1440 3
136#define FD_1200 4
137#define FD_820 5
138#define FD_800 6
139#define FD_720 7
140#define FD_360 8
141#define FD_640 9
142#define FD_1232 10
143
144#define FD_1480in5_25 11
145#define FD_1440in5_25 12
146#define FD_820in5_25 13
147#define FD_800in5_25 14
148#define FD_720in5_25 15
149#define FD_360in5_25 16
150#define FD_640in5_25 17
151
152
153static struct fd_type fd_types[NUMTYPES] =
154{
155{ 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
156{ 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
157{ 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
158{ 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
159{ 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
160{ 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
161{ 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
162{ 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
163{ 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
164{ 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
165
166{ 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
167{ 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
168{ 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
169{ 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
170{ 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
171{ 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
172{ 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
173};
174
175#define DRVS_PER_CTLR 2 /* 2 floppies */
176
177/***********************************************************************\
178* Per controller structure. *
179\***********************************************************************/
8c5c0470 180devclass_t fdc_devclass;
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181
182/***********************************************************************\
183* Per drive structure. *
184* N per controller (DRVS_PER_CTLR) *
185\***********************************************************************/
186struct fd_data {
187 struct fdc_data *fdc; /* pointer to controller structure */
188 int fdsu; /* this units number on this controller */
189 int type; /* Drive type (FD_1440...) */
190 struct fd_type *ft; /* pointer to the type descriptor */
191 int flags;
192#define FD_OPEN 0x01 /* it's open */
193#define FD_ACTIVE 0x02 /* it's active */
194#define FD_MOTOR 0x04 /* motor should be on */
195#define FD_MOTOR_WAIT 0x08 /* motor coming up */
196 int skip;
197 int hddrv;
198#define FD_NO_TRACK -2
199 int track; /* where we think the head is */
200 int options; /* user configurable options, see ioctl_fd.h */
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201 struct callout toffhandle;
202 struct callout tohandle;
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203 struct devstat device_stats;
204 device_t dev;
205 fdu_t fdu;
206};
207
208struct fdc_ivars {
209 int fdunit;
210};
211static devclass_t fd_devclass;
212
213/***********************************************************************\
214* Throughout this file the following conventions will be used: *
215* fd is a pointer to the fd_data struct for the drive in question *
216* fdc is a pointer to the fdc_data struct for the controller *
217* fdu is the floppy drive unit number *
218* fdcu is the floppy controller unit number *
219* fdsu is the floppy drive unit number on that controller. (sub-unit) *
220\***********************************************************************/
221
222/* internal functions */
223static void fdc_intr(void *);
224static void set_motor(struct fdc_data *, int, int);
225# define TURNON 1
226# define TURNOFF 0
227static timeout_t fd_turnoff;
228static timeout_t fd_motor_on;
229static void fd_turnon(struct fd_data *);
230static void fdc_reset(fdc_p);
231static int fd_in(struct fdc_data *, int *);
232static int out_fdc(struct fdc_data *, int);
233static void fdstart(struct fdc_data *);
234static timeout_t fd_iotimeout;
235static timeout_t fd_pseudointr;
236static int fdstate(struct fdc_data *);
237static int retrier(struct fdc_data *);
41c20dac 238static int fdformat(dev_t, struct fd_formb *, struct thread *);
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239
240static int enable_fifo(fdc_p fdc);
241
242static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
243
244
245#define DEVIDLE 0
246#define FINDWORK 1
247#define DOSEEK 2
248#define SEEKCOMPLETE 3
249#define IOCOMPLETE 4
250#define RECALCOMPLETE 5
251#define STARTRECAL 6
252#define RESETCTLR 7
253#define SEEKWAIT 8
254#define RECALWAIT 9
255#define MOTORWAIT 10
256#define IOTIMEDOUT 11
257#define RESETCOMPLETE 12
258#define PIOREAD 13
259
260#ifdef FDC_DEBUG
261static char const * const fdstates[] =
262{
263"DEVIDLE",
264"FINDWORK",
265"DOSEEK",
266"SEEKCOMPLETE",
267"IOCOMPLETE",
268"RECALCOMPLETE",
269"STARTRECAL",
270"RESETCTLR",
271"SEEKWAIT",
272"RECALWAIT",
273"MOTORWAIT",
274"IOTIMEDOUT",
275"RESETCOMPLETE",
276"PIOREAD",
277};
278
279/* CAUTION: fd_debug causes huge amounts of logging output */
280static int volatile fd_debug = 0;
281#define TRACE0(arg) if(fd_debug) printf(arg)
282#define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2)
283#else /* FDC_DEBUG */
284#define TRACE0(arg)
285#define TRACE1(arg1, arg2)
286#endif /* FDC_DEBUG */
287
8c5c0470 288void
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289fdout_wr(fdc_p fdc, u_int8_t v)
290{
291 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
292}
293
294static u_int8_t
295fdsts_rd(fdc_p fdc)
296{
297 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
298}
299
300static void
301fddata_wr(fdc_p fdc, u_int8_t v)
302{
303 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
304}
305
306static u_int8_t
307fddata_rd(fdc_p fdc)
308{
309 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
310}
311
312static void
313fdctl_wr_isa(fdc_p fdc, u_int8_t v)
314{
315 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
316}
317
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318#if 0
319
320static u_int8_t
321fdin_rd(fdc_p fdc)
322{
323 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
324}
325
326#endif
327
328static d_open_t Fdopen; /* NOTE, not fdopen */
329static d_close_t fdclose;
330static d_ioctl_t fdioctl;
331static d_strategy_t fdstrategy;
332
984263bc 333static struct cdevsw fd_cdevsw = {
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334 /* name */ "fd",
335 /* maj */ FD_CDEV_MAJOR,
336 /* flags */ D_DISK,
337 /* port */ NULL,
455fcd7e 338 /* clone */ NULL,
fabb8ceb 339
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340 /* open */ Fdopen,
341 /* close */ fdclose,
342 /* read */ physread,
343 /* write */ physwrite,
344 /* ioctl */ fdioctl,
345 /* poll */ nopoll,
346 /* mmap */ nommap,
347 /* strategy */ fdstrategy,
984263bc 348 /* dump */ nodump,
fabb8ceb 349 /* psize */ nopsize
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350};
351
352static int
353fdc_err(struct fdc_data *fdc, const char *s)
354{
355 fdc->fdc_errs++;
356 if (s) {
357 if (fdc->fdc_errs < FDC_ERRMAX)
358 device_printf(fdc->fdc_dev, "%s", s);
359 else if (fdc->fdc_errs == FDC_ERRMAX)
360 device_printf(fdc->fdc_dev, "too many errors, not "
361 "logging any more\n");
362 }
363
364 return FD_FAILED;
365}
366
367/*
368 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
369 * Unit number,
370 * # of output bytes, output bytes as ints ...,
371 * # of input bytes, input bytes as ints ...
372 */
8c5c0470 373int
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374fd_cmd(struct fdc_data *fdc, int n_out, ...)
375{
376 u_char cmd;
377 int n_in;
378 int n;
e2565a42 379 __va_list ap;
984263bc 380
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381 __va_start(ap, n_out);
382 cmd = (u_char)(__va_arg(ap, int));
383 __va_end(ap);
384 __va_start(ap, n_out);
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385 for (n = 0; n < n_out; n++)
386 {
e2565a42 387 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
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388 {
389 char msg[50];
390 snprintf(msg, sizeof(msg),
391 "cmd %x failed at out byte %d of %d\n",
392 cmd, n + 1, n_out);
393 return fdc_err(fdc, msg);
394 }
395 }
e2565a42 396 n_in = __va_arg(ap, int);
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397 for (n = 0; n < n_in; n++)
398 {
e2565a42 399 int *ptr = __va_arg(ap, int *);
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400 if (fd_in(fdc, ptr) < 0)
401 {
402 char msg[50];
403 snprintf(msg, sizeof(msg),
404 "cmd %02x failed at in byte %d of %d\n",
405 cmd, n + 1, n_in);
406 return fdc_err(fdc, msg);
407 }
408 }
409
410 return 0;
411}
412
413static int
414enable_fifo(fdc_p fdc)
415{
416 int i, j;
417
418 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
419
420 /*
421 * XXX:
422 * Cannot use fd_cmd the normal way here, since
423 * this might be an invalid command. Thus we send the
424 * first byte, and check for an early turn of data directon.
425 */
426
427 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
428 return fdc_err(fdc, "Enable FIFO failed\n");
429
430 /* If command is invalid, return */
431 j = FDSTS_TIMEOUT;
432 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
433 != NE7_RQM && j-- > 0) {
434 if (i == (NE7_DIO | NE7_RQM)) {
435 fdc_reset(fdc);
436 return FD_FAILED;
437 }
438 DELAY(1);
439 }
440 if (j<0 ||
441 fd_cmd(fdc, 3,
442 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
443 fdc_reset(fdc);
444 return fdc_err(fdc, "Enable FIFO failed\n");
445 }
446 fdc->flags |= FDC_HAS_FIFO;
447 return 0;
448 }
449 if (fd_cmd(fdc, 4,
450 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
451 return fdc_err(fdc, "Re-enable FIFO failed\n");
452 return 0;
453}
454
455static int
456fd_sense_drive_status(fdc_p fdc, int *st3p)
457{
458 int st3;
459
460 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
461 {
462 return fdc_err(fdc, "Sense Drive Status failed\n");
463 }
464 if (st3p)
465 *st3p = st3;
466
467 return 0;
468}
469
470static int
471fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
472{
473 int cyl, st0, ret;
474
475 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
476 if (ret) {
477 (void)fdc_err(fdc,
478 "sense intr err reading stat reg 0\n");
479 return ret;
480 }
481
482 if (st0p)
483 *st0p = st0;
484
485 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
486 /*
487 * There doesn't seem to have been an interrupt.
488 */
489 return FD_NOT_VALID;
490 }
491
492 if (fd_in(fdc, &cyl) < 0) {
493 return fdc_err(fdc, "can't get cyl num\n");
494 }
495
496 if (cylp)
497 *cylp = cyl;
498
499 return 0;
500}
501
502
503static int
504fd_read_status(fdc_p fdc, int fdsu)
505{
506 int i, ret;
507
508 for (i = 0; i < 7; i++) {
509 /*
510 * XXX types are poorly chosen. Only bytes can by read
511 * from the hardware, but fdc->status[] wants u_ints and
512 * fd_in() gives ints.
513 */
514 int status;
515
516 ret = fd_in(fdc, &status);
517 fdc->status[i] = status;
518 if (ret != 0)
519 break;
520 }
521
522 if (ret == 0)
523 fdc->flags |= FDC_STAT_VALID;
524 else
525 fdc->flags &= ~FDC_STAT_VALID;
526
527 return ret;
528}
529
530/****************************************************************************/
531/* autoconfiguration stuff */
532/****************************************************************************/
533
8c5c0470 534int
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535fdc_alloc_resources(struct fdc_data *fdc)
536{
537 device_t dev;
538 int ispnp, ispcmcia;
539
540 dev = fdc->fdc_dev;
541 ispnp = (fdc->flags & FDC_ISPNP) != 0;
542 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
543 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
544 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
545
546 /*
547 * On standard ISA, we don't just use an 8 port range
548 * (e.g. 0x3f0-0x3f7) since that covers an IDE control
549 * register at 0x3f6.
550 *
551 * Isn't PC hardware wonderful.
552 *
553 * The Y-E Data PCMCIA FDC doesn't have this problem, it
554 * uses the register with offset 6 for pseudo-DMA, and the
555 * one with offset 7 as control register.
556 */
557 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
558 &fdc->rid_ioport, 0ul, ~0ul,
559 ispcmcia ? 8 : (ispnp ? 1 : 6),
560 RF_ACTIVE);
561 if (fdc->res_ioport == 0) {
562 device_printf(dev, "cannot reserve I/O port range\n");
563 return ENXIO;
564 }
565 fdc->portt = rman_get_bustag(fdc->res_ioport);
566 fdc->porth = rman_get_bushandle(fdc->res_ioport);
567
568 if (!ispcmcia) {
569 /*
570 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
571 * and some at 0x3f0-0x3f5,0x3f7. We detect the former
572 * by checking the size and adjust the port address
573 * accordingly.
574 */
575 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
576 fdc->port_off = -2;
577
578 /*
579 * Register the control port range as rid 1 if it
580 * isn't there already. Most PnP BIOSen will have
581 * already done this but non-PnP configurations don't.
582 *
583 * And some (!!) report 0x3f2-0x3f5 and completely
584 * leave out the control register! It seems that some
585 * non-antique controller chips have a different
586 * method of programming the transfer speed which
587 * doesn't require the control register, but it's
588 * mighty bogus as the chip still responds to the
589 * address for the control register.
590 */
591 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
592 u_long ctlstart;
593
594 /* Find the control port, usually 0x3f7 */
595 ctlstart = rman_get_start(fdc->res_ioport) +
596 fdc->port_off + 7;
597
598 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
599 }
600
601 /*
602 * Now (finally!) allocate the control port.
603 */
604 fdc->rid_ctl = 1;
605 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
606 &fdc->rid_ctl,
607 0ul, ~0ul, 1, RF_ACTIVE);
608 if (fdc->res_ctl == 0) {
609 device_printf(dev,
610 "cannot reserve control I/O port range\n");
611 return ENXIO;
612 }
613 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
614 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
615 }
616
617 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
618 &fdc->rid_irq, 0ul, ~0ul, 1,
619 RF_ACTIVE);
620 if (fdc->res_irq == 0) {
621 device_printf(dev, "cannot reserve interrupt line\n");
622 return ENXIO;
623 }
624
625 if ((fdc->flags & FDC_NODMA) == 0) {
626 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
627 &fdc->rid_drq, 0ul, ~0ul, 1,
628 RF_ACTIVE);
629 if (fdc->res_drq == 0) {
630 device_printf(dev, "cannot reserve DMA request line\n");
631 return ENXIO;
632 }
633 fdc->dmachan = fdc->res_drq->r_start;
634 }
635
636 return 0;
637}
638
8c5c0470 639void
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640fdc_release_resources(struct fdc_data *fdc)
641{
642 device_t dev;
643
644 dev = fdc->fdc_dev;
645 if (fdc->res_irq != 0) {
646 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
647 fdc->res_irq);
648 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
649 fdc->res_irq);
650 }
651 if (fdc->res_ctl != 0) {
652 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
653 fdc->res_ctl);
654 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
655 fdc->res_ctl);
656 }
657 if (fdc->res_ioport != 0) {
658 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
659 fdc->res_ioport);
660 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
661 fdc->res_ioport);
662 }
663 if (fdc->res_drq != 0) {
664 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
665 fdc->res_drq);
666 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
667 fdc->res_drq);
668 }
669}
670
671/****************************************************************************/
672/* autoconfiguration stuff */
673/****************************************************************************/
674
675static struct isa_pnp_id fdc_ids[] = {
676 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
677 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
678 {0}
679};
680
8c5c0470 681int
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682fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
683{
684 struct fdc_ivars *ivars = device_get_ivars(child);
685
686 switch (which) {
687 case FDC_IVAR_FDUNIT:
688 *result = ivars->fdunit;
689 break;
690 default:
691 return ENOENT;
692 }
693 return 0;
694}
695
696/*
697 * fdc controller section.
698 */
699static int
700fdc_probe(device_t dev)
701{
702 int error, ic_type;
703 struct fdc_data *fdc;
704
705 fdc = device_get_softc(dev);
706 bzero(fdc, sizeof *fdc);
707 fdc->fdc_dev = dev;
708 fdc->fdctl_wr = fdctl_wr_isa;
709
710 /* Check pnp ids */
711 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
712 if (error == ENXIO)
713 return ENXIO;
714 if (error == 0)
715 fdc->flags |= FDC_ISPNP;
716
717 /* Attempt to allocate our resources for the duration of the probe */
718 error = fdc_alloc_resources(fdc);
719 if (error)
720 goto out;
721
722 /* First - lets reset the floppy controller */
723 fdout_wr(fdc, 0);
724 DELAY(100);
725 fdout_wr(fdc, FDO_FRST);
726
727 /* see if it can handle a command */
728 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
729 NE7_SPEC_2(2, 0), 0)) {
730 error = ENXIO;
731 goto out;
732 }
733
734 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
735 ic_type = (u_char)ic_type;
736 switch (ic_type) {
737 case 0x80:
738 device_set_desc(dev, "NEC 765 or clone");
739 fdc->fdct = FDC_NE765;
740 break;
741 case 0x81:
742 device_set_desc(dev, "Intel 82077 or clone");
743 fdc->fdct = FDC_I82077;
744 break;
745 case 0x90:
746 device_set_desc(dev, "NEC 72065B or clone");
747 fdc->fdct = FDC_NE72065;
748 break;
749 default:
750 device_set_desc(dev, "generic floppy controller");
751 fdc->fdct = FDC_UNKNOWN;
752 break;
753 }
754 }
755
756out:
757 fdc_release_resources(fdc);
758 return (error);
759}
760
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761/*
762 * Add a child device to the fdc controller. It will then be probed etc.
763 */
764static void
765fdc_add_child(device_t dev, const char *name, int unit)
766{
767 int disabled;
768 struct fdc_ivars *ivar;
769 device_t child;
770
3aed1355 771 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
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772 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
773 ivar->fdunit = 0;
774 child = device_add_child(dev, name, unit);
775 if (child == NULL)
776 return;
777 device_set_ivars(child, ivar);
778 if (resource_int_value(name, unit, "disabled", &disabled) == 0
779 && disabled != 0)
780 device_disable(child);
781}
782
8c5c0470 783int
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784fdc_attach(device_t dev)
785{
786 struct fdc_data *fdc;
787 int i, error;
788
789 fdc = device_get_softc(dev);
790 error = fdc_alloc_resources(fdc);
791 if (error) {
792 device_printf(dev, "cannot re-aquire resources\n");
793 return error;
794 }
795 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
796 INTR_TYPE_BIO, fdc_intr, fdc, &fdc->fdc_intr);
797 if (error) {
798 device_printf(dev, "cannot setup interrupt\n");
799 return error;
800 }
801 fdc->fdcu = device_get_unit(dev);
802 fdc->flags |= FDC_ATTACHED;
803
804 if ((fdc->flags & FDC_NODMA) == 0) {
805 /* Acquire the DMA channel forever, The driver will do the rest */
806 /* XXX should integrate with rman */
807 isa_dma_acquire(fdc->dmachan);
808 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
809 }
810 fdc->state = DEVIDLE;
811
812 /* reset controller, turn motor off, clear fdout mirror reg */
813 fdout_wr(fdc, ((fdc->fdout = 0)));
814 bufq_init(&fdc->head);
815
816 /*
817 * Probe and attach any children. We should probably detect
818 * devices from the BIOS unless overridden.
819 */
820 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
821 i != -1;
822 i = resource_query_string(i, "at", device_get_nameunit(dev)))
823 fdc_add_child(dev, resource_query_name(i),
824 resource_query_unit(i));
825
826 return (bus_generic_attach(dev));
827}
828
8c5c0470 829int
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830fdc_print_child(device_t me, device_t child)
831{
832 int retval = 0;
833
834 retval += bus_print_child_header(me, child);
835 retval += printf(" on %s drive %d\n", device_get_nameunit(me),
836 fdc_get_fdunit(child));
837
838 return (retval);
839}
840
841static device_method_t fdc_methods[] = {
842 /* Device interface */
843 DEVMETHOD(device_probe, fdc_probe),
844 DEVMETHOD(device_attach, fdc_attach),
845 DEVMETHOD(device_detach, bus_generic_detach),
846 DEVMETHOD(device_shutdown, bus_generic_shutdown),
847 DEVMETHOD(device_suspend, bus_generic_suspend),
848 DEVMETHOD(device_resume, bus_generic_resume),
849
850 /* Bus interface */
851 DEVMETHOD(bus_print_child, fdc_print_child),
852 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
853 /* Our children never use any other bus interface methods. */
854
855 { 0, 0 }
856};
857
858static driver_t fdc_driver = {
859 "fdc",
860 fdc_methods,
861 sizeof(struct fdc_data)
862};
863
864DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
865
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866/******************************************************************/
867/*
868 * devices attached to the controller section.
869 */
870static int
871fd_probe(device_t dev)
872{
873 int i;
874 u_int fdt, st0, st3;
875 struct fd_data *fd;
876 struct fdc_data *fdc;
877 fdsu_t fdsu;
878 static int fd_fifo = 0;
879
880 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
881 fd = device_get_softc(dev);
882 fdc = device_get_softc(device_get_parent(dev));
883
884 bzero(fd, sizeof *fd);
885 fd->dev = dev;
886 fd->fdc = fdc;
887 fd->fdsu = fdsu;
888 fd->fdu = device_get_unit(dev);
889
890#ifdef __i386__
891 /* look up what bios thinks we have */
892 switch (fd->fdu) {
893 case 0:
894 if ((fdc->flags & FDC_ISPCMCIA))
895 fdt = RTCFDT_144M;
896 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
897 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
898 else
899 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
900 break;
901 case 1:
902 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
903 break;
904 default:
905 fdt = RTCFDT_NONE;
906 break;
907 }
908#else
909 fdt = RTCFDT_144M; /* XXX probably */
910#endif
911
912 /* is there a unit? */
913 if (fdt == RTCFDT_NONE)
914 return (ENXIO);
915
916 /* select it */
917 set_motor(fdc, fdsu, TURNON);
918 DELAY(1000000); /* 1 sec */
919
920 /* XXX This doesn't work before the first set_motor() */
921 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
922 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
923 && enable_fifo(fdc) == 0) {
924 device_printf(device_get_parent(dev),
925 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
926 }
927 fd_fifo = 1;
928
929 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
930 && (st3 & NE7_ST3_T0)) {
931 /* if at track 0, first seek inwards */
932 /* seek some steps: */
933 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
934 DELAY(300000); /* ...wait a moment... */
935 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
936 }
937
938 /* If we're at track 0 first seek inwards. */
939 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
940 /* Seek some steps... */
941 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
942 /* ...wait a moment... */
943 DELAY(300000);
944 /* make ctrlr happy: */
945 fd_sense_int(fdc, 0, 0);
946 }
947 }
948
949 for (i = 0; i < 2; i++) {
950 /*
951 * we must recalibrate twice, just in case the
952 * heads have been beyond cylinder 76, since most
953 * FDCs still barf when attempting to recalibrate
954 * more than 77 steps
955 */
956 /* go back to 0: */
957 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
958 /* a second being enough for full stroke seek*/
959 DELAY(i == 0 ? 1000000 : 300000);
960
961 /* anything responding? */
962 if (fd_sense_int(fdc, &st0, 0) == 0 &&
963 (st0 & NE7_ST0_EC) == 0)
964 break; /* already probed succesfully */
965 }
966 }
967
968 set_motor(fdc, fdsu, TURNOFF);
969
970 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
971 return (ENXIO);
972
973 fd->track = FD_NO_TRACK;
974 fd->fdc = fdc;
975 fd->fdsu = fdsu;
976 fd->options = 0;
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MD
977 callout_init(&fd->toffhandle);
978 callout_init(&fd->tohandle);
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979
980 switch (fdt) {
981 case RTCFDT_12M:
982 device_set_desc(dev, "1200-KB 5.25\" drive");
983 fd->type = FD_1200;
984 break;
985 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
986 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
987 fdt = RTCFDT_144M;
988 fd->type = FD_1440;
989 case RTCFDT_144M:
990 device_set_desc(dev, "1440-KB 3.5\" drive");
991 fd->type = FD_1440;
992 break;
993 case RTCFDT_288M:
994 case RTCFDT_288M_1:
995 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
996 fd->type = FD_1440;
997 break;
998 case RTCFDT_360K:
999 device_set_desc(dev, "360-KB 5.25\" drive");
1000 fd->type = FD_360;
1001 break;
1002 case RTCFDT_720K:
1003 printf("720-KB 3.5\" drive");
1004 fd->type = FD_720;
1005 break;
1006 default:
1007 return (ENXIO);
1008 }
1009 return (0);
1010}
1011
1012static int
1013fd_attach(device_t dev)
1014{
1015 struct fd_data *fd;
1016#if 0
1017 int i;
1018 int mynor;
1019 int typemynor;
1020 int typesize;
1021#endif
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1022
1023 fd = device_get_softc(dev);
1024
e4c9c0c8 1025 cdevsw_add(&fd_cdevsw, -1 << 6, fd->fdu << 6);
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MD
1026 make_dev(&fd_cdevsw, (fd->fdu << 6),
1027 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu);
1028
1029#if 0
1030 /* Other make_dev() go here. */
1031#endif
1032
1033 /*
1034 * Export the drive to the devstat interface.
1035 */
1036 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1037 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1038 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1039 DEVSTAT_PRIORITY_FD);
1040 return (0);
1041}
1042
1043static int
1044fd_detach(device_t dev)
1045{
1046 struct fd_data *fd;
1047
1048 fd = device_get_softc(dev);
e8b273ff 1049 callout_stop(&fd->toffhandle);
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MD
1050
1051 return (0);
1052}
1053
1054static device_method_t fd_methods[] = {
1055 /* Device interface */
1056 DEVMETHOD(device_probe, fd_probe),
1057 DEVMETHOD(device_attach, fd_attach),
1058 DEVMETHOD(device_detach, fd_detach),
1059 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1060 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1061 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1062
1063 { 0, 0 }
1064};
1065
1066static driver_t fd_driver = {
1067 "fd",
1068 fd_methods,
1069 sizeof(struct fd_data)
1070};
1071
1072DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1073
1074/****************************************************************************/
1075/* motor control stuff */
1076/* remember to not deselect the drive we're working on */
1077/****************************************************************************/
1078static void
1079set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1080{
1081 int fdout = fdc->fdout;
1082 int needspecify = 0;
1083
1084 if(turnon) {
1085 fdout &= ~FDO_FDSEL;
1086 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1087 } else
1088 fdout &= ~(FDO_MOEN0 << fdsu);
1089
1090 if(!turnon
1091 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1092 /* gonna turn off the last drive, put FDC to bed */
1093 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1094 else {
1095 /* make sure controller is selected and specified */
1096 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1097 needspecify = 1;
1098 fdout |= (FDO_FRST|FDO_FDMAEN);
1099 }
1100
1101 fdout_wr(fdc, fdout);
1102 fdc->fdout = fdout;
1103 TRACE1("[0x%x->FDOUT]", fdout);
1104
1105 if (needspecify) {
1106 /*
1107 * XXX
1108 * special case: since we have just woken up the FDC
1109 * from its sleep, we silently assume the command will
1110 * be accepted, and do not test for a timeout
1111 */
1112 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1113 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1114 0);
1115 if (fdc->flags & FDC_HAS_FIFO)
1116 (void) enable_fifo(fdc);
1117 }
1118}
1119
1120static void
1121fd_turnoff(void *xfd)
1122{
1123 int s;
1124 fd_p fd = xfd;
1125
1126 TRACE1("[fd%d: turnoff]", fd->fdu);
1127
1128 s = splbio();
1129 /*
1130 * Don't turn off the motor yet if the drive is active.
1131 *
1132 * If we got here, this could only mean we missed an interrupt.
1133 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1134 * after a controller reset. Just schedule a pseudo-interrupt
1135 * so the state machine gets re-entered.
1136 */
1137 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1138 fdc_intr(fd->fdc);
1139 splx(s);
1140 return;
1141 }
1142
1143 fd->flags &= ~FD_MOTOR;
1144 set_motor(fd->fdc, fd->fdsu, TURNOFF);
1145 splx(s);
1146}
1147
1148static void
1149fd_motor_on(void *xfd)
1150{
1151 int s;
1152 fd_p fd = xfd;
1153
1154 s = splbio();
1155 fd->flags &= ~FD_MOTOR_WAIT;
1156 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1157 {
1158 fdc_intr(fd->fdc);
1159 }
1160 splx(s);
1161}
1162
1163static void
1164fd_turnon(fd_p fd)
1165{
1166 if(!(fd->flags & FD_MOTOR))
1167 {
1168 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1169 set_motor(fd->fdc, fd->fdsu, TURNON);
1170 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */
1171 }
1172}
1173
1174static void
1175fdc_reset(fdc_p fdc)
1176{
1177 /* Try a reset, keep motor on */
1178 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1179 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1180 DELAY(100);
1181 /* enable FDC, but defer interrupts a moment */
1182 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1183 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1184 DELAY(100);
1185 fdout_wr(fdc, fdc->fdout);
1186 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1187
1188 /* XXX after a reset, silently believe the FDC will accept commands */
1189 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1190 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1191 0);
1192 if (fdc->flags & FDC_HAS_FIFO)
1193 (void) enable_fifo(fdc);
1194}
1195
1196/****************************************************************************/
1197/* fdc in/out */
1198/****************************************************************************/
1199/*
1200 * FDC IO functions, take care of the main status register, timeout
1201 * in case the desired status bits are never set.
1202 *
1203 * These PIO loops initially start out with short delays between
1204 * each iteration in the expectation that the required condition
1205 * is usually met quickly, so it can be handled immediately. After
1206 * about 1 ms, stepping is increased to achieve a better timing
1207 * accuracy in the calls to DELAY().
1208 */
1209static int
1210fd_in(struct fdc_data *fdc, int *ptr)
1211{
1212 int i, j, step;
1213
1214 for (j = 0, step = 1;
1215 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1216 j < FDSTS_TIMEOUT;
1217 j += step) {
1218 if (i == NE7_RQM)
1219 return (fdc_err(fdc, "ready for output in input\n"));
1220 if (j == 1000)
1221 step = 1000;
1222 DELAY(step);
1223 }
1224 if (j >= FDSTS_TIMEOUT)
1225 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1226#ifdef FDC_DEBUG
1227 i = fddata_rd(fdc);
1228 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1229 *ptr = i;
1230 return (0);
1231#else /* !FDC_DEBUG */
1232 i = fddata_rd(fdc);
1233 if (ptr)
1234 *ptr = i;
1235 return (0);
1236#endif /* FDC_DEBUG */
1237}
1238
1239static int
1240out_fdc(struct fdc_data *fdc, int x)
1241{
1242 int i, j, step;
1243
1244 for (j = 0, step = 1;
1245 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1246 j < FDSTS_TIMEOUT;
1247 j += step) {
1248 if (i == (NE7_DIO|NE7_RQM))
1249 return (fdc_err(fdc, "ready for input in output\n"));
1250 if (j == 1000)
1251 step = 1000;
1252 DELAY(step);
1253 }
1254 if (j >= FDSTS_TIMEOUT)
1255 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1256
1257 /* Send the command and return */
1258 fddata_wr(fdc, x);
1259 TRACE1("[0x%x->FDDATA]", x);
1260 return (0);
1261}
1262
1263/****************************************************************************/
1264/* fdopen/fdclose */
1265/****************************************************************************/
1266int
41c20dac 1267Fdopen(dev_t dev, int flags, int mode, struct thread *td)
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MD
1268{
1269 fdu_t fdu = FDUNIT(minor(dev));
1270 int type = FDTYPE(minor(dev));
1271 fd_p fd;
1272 fdc_p fdc;
1273
1274 /* check bounds */
1275 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1276 return (ENXIO);
1277 fdc = fd->fdc;
1278 if ((fdc == NULL) || (fd->type == NO_TYPE))
1279 return (ENXIO);
1280 if (type > NUMDENS)
1281 return (ENXIO);
1282 if (type == 0)
1283 type = fd->type;
1284 else {
1285 /*
1286 * For each type of basic drive, make sure we are trying
1287 * to open a type it can do,
1288 */
1289 if (type != fd->type) {
1290 switch (fd->type) {
1291 case FD_360:
1292 return (ENXIO);
1293 case FD_720:
1294 if ( type != FD_820
1295 && type != FD_800
1296 && type != FD_640
1297 )
1298 return (ENXIO);
1299 break;
1300 case FD_1200:
1301 switch (type) {
1302 case FD_1480:
1303 type = FD_1480in5_25;
1304 break;
1305 case FD_1440:
1306 type = FD_1440in5_25;
1307 break;
1308 case FD_1232:
1309 break;
1310 case FD_820:
1311 type = FD_820in5_25;
1312 break;
1313 case FD_800:
1314 type = FD_800in5_25;
1315 break;
1316 case FD_720:
1317 type = FD_720in5_25;
1318 break;
1319 case FD_640:
1320 type = FD_640in5_25;
1321 break;
1322 case FD_360:
1323 type = FD_360in5_25;
1324 break;
1325 default:
1326 return(ENXIO);
1327 }
1328 break;
1329 case FD_1440:
1330 if ( type != FD_1720
1331 && type != FD_1480
1332 && type != FD_1200
1333 && type != FD_820
1334 && type != FD_800
1335 && type != FD_720
1336 && type != FD_640
1337 )
1338 return(ENXIO);
1339 break;
1340 }
1341 }
1342 }
1343 fd->ft = fd_types + type - 1;
1344 fd->flags |= FD_OPEN;
1345 /*
1346 * Clearing the DMA overrun counter at open time is a bit messy.
1347 * Since we're only managing one counter per controller, opening
1348 * the second drive could mess it up. Anyway, if the DMA overrun
1349 * condition is really persistent, it will eventually time out
1350 * still. OTOH, clearing it here will ensure we'll at least start
1351 * trying again after a previous (maybe even long ago) failure.
1352 * Also, this is merely a stop-gap measure only that should not
1353 * happen during normal operation, so we can tolerate it to be a
1354 * bit sloppy about this.
1355 */
1356 fdc->dma_overruns = 0;
1357
1358 return 0;
1359}
1360
1361int
41c20dac 1362fdclose(dev_t dev, int flags, int mode, struct thread *td)
984263bc
MD
1363{
1364 fdu_t fdu = FDUNIT(minor(dev));
1365 struct fd_data *fd;
1366
1367 fd = devclass_get_softc(fd_devclass, fdu);
1368 fd->flags &= ~FD_OPEN;
1369 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1370
1371 return (0);
1372}
1373
1374/****************************************************************************/
1375/* fdstrategy */
1376/****************************************************************************/
1377void
1378fdstrategy(struct buf *bp)
1379{
1380 unsigned nblocks, blknum, cando;
1381 int s;
1382 fdu_t fdu;
1383 fdc_p fdc;
1384 fd_p fd;
1385 size_t fdblk;
1386
1387 fdu = FDUNIT(minor(bp->b_dev));
1388 fd = devclass_get_softc(fd_devclass, fdu);
1389 if (fd == 0)
1390 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1391 (u_long)major(bp->b_dev), (u_long)minor(bp->b_dev));
1392 fdc = fd->fdc;
1393 if (fd->type == NO_TYPE) {
1394 bp->b_error = ENXIO;
1395 bp->b_flags |= B_ERROR;
1396 goto bad;
1397 };
1398
1399 fdblk = 128 << (fd->ft->secsize);
1400 if (!(bp->b_flags & B_FORMAT)) {
1401 if (bp->b_blkno < 0) {
1402 printf(
1403 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
1404 fdu, (u_long)bp->b_blkno, bp->b_bcount);
1405 bp->b_error = EINVAL;
1406 bp->b_flags |= B_ERROR;
1407 goto bad;
1408 }
1409 if ((bp->b_bcount % fdblk) != 0) {
1410 bp->b_error = EINVAL;
1411 bp->b_flags |= B_ERROR;
1412 goto bad;
1413 }
1414 }
1415
1416 /*
1417 * Set up block calculations.
1418 */
1419 if (bp->b_blkno > 20000000) {
1420 /*
1421 * Reject unreasonably high block number, prevent the
1422 * multiplication below from overflowing.
1423 */
1424 bp->b_error = EINVAL;
1425 bp->b_flags |= B_ERROR;
1426 goto bad;
1427 }
1428 blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk;
1429 nblocks = fd->ft->size;
1430 bp->b_resid = 0;
1431 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1432 if (blknum <= nblocks) {
1433 cando = (nblocks - blknum) * fdblk;
1434 bp->b_resid = bp->b_bcount - cando;
1435 if (cando == 0)
1436 goto bad; /* not actually bad but EOF */
1437 } else {
1438 bp->b_error = EINVAL;
1439 bp->b_flags |= B_ERROR;
1440 goto bad;
1441 }
1442 }
1443 bp->b_pblkno = bp->b_blkno;
1444 s = splbio();
1445 bufqdisksort(&fdc->head, bp);
e8b273ff 1446 callout_stop(&fd->toffhandle);
984263bc
MD
1447
1448 /* Tell devstat we are starting on the transaction */
1449 devstat_start_transaction(&fd->device_stats);
1450 device_busy(fd->dev);
1451
1452 fdstart(fdc);
1453 splx(s);
1454 return;
1455
1456bad:
1457 biodone(bp);
1458}
1459
1460/***************************************************************\
1461* fdstart *
1462* We have just queued something.. if the controller is not busy *
1463* then simulate the case where it has just finished a command *
1464* So that it (the interrupt routine) looks on the queue for more*
1465* work to do and picks up what we just added. *
1466* If the controller is already busy, we need do nothing, as it *
1467* will pick up our work when the present work completes *
1468\***************************************************************/
1469static void
1470fdstart(struct fdc_data *fdc)
1471{
1472 int s;
1473
1474 s = splbio();
1475 if(fdc->state == DEVIDLE)
1476 {
1477 fdc_intr(fdc);
1478 }
1479 splx(s);
1480}
1481
1482static void
1483fd_iotimeout(void *xfdc)
1484{
1485 fdc_p fdc;
1486 int s;
1487
1488 fdc = xfdc;
1489 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1490
1491 /*
1492 * Due to IBM's brain-dead design, the FDC has a faked ready
1493 * signal, hardwired to ready == true. Thus, any command
1494 * issued if there's no diskette in the drive will _never_
1495 * complete, and must be aborted by resetting the FDC.
1496 * Many thanks, Big Blue!
1497 * The FDC must not be reset directly, since that would
1498 * interfere with the state machine. Instead, pretend that
1499 * the command completed but was invalid. The state machine
1500 * will reset the FDC and retry once.
1501 */
1502 s = splbio();
1503 fdc->status[0] = NE7_ST0_IC_IV;
1504 fdc->flags &= ~FDC_STAT_VALID;
1505 fdc->state = IOTIMEDOUT;
1506 fdc_intr(fdc);
1507 splx(s);
1508}
1509
1510/* just ensure it has the right spl */
1511static void
1512fd_pseudointr(void *xfdc)
1513{
1514 int s;
1515
1516 s = splbio();
1517 fdc_intr(xfdc);
1518 splx(s);
1519}
1520
1521/***********************************************************************\
1522* fdintr *
1523* keep calling the state machine until it returns a 0 *
1524* ALWAYS called at SPLBIO *
1525\***********************************************************************/
1526static void
1527fdc_intr(void *xfdc)
1528{
1529 fdc_p fdc = xfdc;
1530 while(fdstate(fdc))
1531 ;
1532}
1533
1534/*
1535 * magic pseudo-DMA initialization for YE FDC. Sets count and
1536 * direction
1537 */
1538#define SET_BCDR(fdc,wr,cnt,port) \
1539 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1540 ((cnt)-1) & 0xff); \
1541 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1542 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1543
1544/*
1545 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1546 */
1547static int fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count)
1548{
1549 u_char *cptr = (u_char *)addr;
1550
1551 if (flags & B_READ) {
1552 if (fdc->state != PIOREAD) {
1553 fdc->state = PIOREAD;
1554 return(0);
1555 };
1556 SET_BCDR(fdc, 0, count, 0);
1557 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1558 FDC_YE_DATAPORT, cptr, count);
1559 } else {
1560 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1561 FDC_YE_DATAPORT, cptr, count);
1562 SET_BCDR(fdc, 0, count, 0);
1563 };
1564 return(1);
1565}
1566
1567/***********************************************************************\
1568* The controller state machine. *
1569* if it returns a non zero value, it should be called again immediatly *
1570\***********************************************************************/
1571static int
1572fdstate(fdc_p fdc)
1573{
1574 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1575 unsigned blknum = 0, b_cylinder = 0;
1576 fdu_t fdu = fdc->fdu;
1577 fd_p fd;
3a1b0fdc 1578 struct buf *bp;
984263bc
MD
1579 struct fd_formb *finfo = NULL;
1580 size_t fdblk;
1581
1582 bp = fdc->bp;
1583 if (bp == NULL) {
1584 bp = bufq_first(&fdc->head);
1585 if (bp != NULL) {
1586 bufq_remove(&fdc->head, bp);
1587 fdc->bp = bp;
1588 }
1589 }
1590 if (bp == NULL) {
1591 /***********************************************\
1592 * nothing left for this controller to do *
1593 * Force into the IDLE state, *
1594 \***********************************************/
1595 fdc->state = DEVIDLE;
1596 if (fdc->fd) {
1597 device_printf(fdc->fdc_dev,
1598 "unexpected valid fd pointer\n");
1599 fdc->fd = (fd_p) 0;
1600 fdc->fdu = -1;
1601 }
1602 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1603 return (0);
1604 }
1605 fdu = FDUNIT(minor(bp->b_dev));
1606 fd = devclass_get_softc(fd_devclass, fdu);
1607 fdblk = 128 << fd->ft->secsize;
1608 if (fdc->fd && (fd != fdc->fd))
1609 device_printf(fd->dev, "confused fd pointers\n");
1610 read = bp->b_flags & B_READ;
1611 format = bp->b_flags & B_FORMAT;
1612 if (format) {
1613 finfo = (struct fd_formb *)bp->b_data;
1614 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1615 - (char *)finfo;
1616 }
1617 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1618 blknum = (unsigned) bp->b_pblkno * DEV_BSIZE/fdblk +
1619 fd->skip/fdblk;
1620 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1621 }
1622 TRACE1("fd%d", fdu);
1623 TRACE1("[%s]", fdstates[fdc->state]);
1624 TRACE1("(0x%x)", fd->flags);
e8b273ff 1625 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
984263bc
MD
1626 switch (fdc->state)
1627 {
1628 case DEVIDLE:
1629 case FINDWORK: /* we have found new work */
1630 fdc->retry = 0;
1631 fd->skip = 0;
1632 fdc->fd = fd;
1633 fdc->fdu = fdu;
1634 fdc->fdctl_wr(fdc, fd->ft->trans);
1635 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1636 /*******************************************************\
1637 * If the next drive has a motor startup pending, then *
1638 * it will start up in its own good time *
1639 \*******************************************************/
1640 if(fd->flags & FD_MOTOR_WAIT) {
1641 fdc->state = MOTORWAIT;
1642 return (0); /* come back later */
1643 }
1644 /*******************************************************\
1645 * Maybe if it's not starting, it SHOULD be starting *
1646 \*******************************************************/
1647 if (!(fd->flags & FD_MOTOR))
1648 {
1649 fdc->state = MOTORWAIT;
1650 fd_turnon(fd);
1651 return (0);
1652 }
1653 else /* at least make sure we are selected */
1654 {
1655 set_motor(fdc, fd->fdsu, TURNON);
1656 }
1657 if (fdc->flags & FDC_NEEDS_RESET) {
1658 fdc->state = RESETCTLR;
1659 fdc->flags &= ~FDC_NEEDS_RESET;
1660 } else
1661 fdc->state = DOSEEK;
1662 break;
1663 case DOSEEK:
1664 if (b_cylinder == (unsigned)fd->track)
1665 {
1666 fdc->state = SEEKCOMPLETE;
1667 break;
1668 }
1669 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1670 fd->fdsu, b_cylinder * fd->ft->steptrac,
1671 0))
1672 {
1673 /*
1674 * seek command not accepted, looks like
1675 * the FDC went off to the Saints...
1676 */
1677 fdc->retry = 6; /* try a reset */
1678 return(retrier(fdc));
1679 }
1680 fd->track = FD_NO_TRACK;
1681 fdc->state = SEEKWAIT;
1682 return(0); /* will return later */
1683 case SEEKWAIT:
1684 /* allow heads to settle */
1685 timeout(fd_pseudointr, fdc, hz / 16);
1686 fdc->state = SEEKCOMPLETE;
1687 return(0); /* will return later */
1688 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1689 /* Make sure seek really happened*/
1690 if(fd->track == FD_NO_TRACK) {
1691 int descyl = b_cylinder * fd->ft->steptrac;
1692 do {
1693 /*
1694 * This might be a "ready changed" interrupt,
1695 * which cannot really happen since the
1696 * RDY pin is hardwired to + 5 volts. This
1697 * generally indicates a "bouncing" intr
1698 * line, so do one of the following:
1699 *
1700 * When running on an enhanced FDC that is
1701 * known to not go stuck after responding
1702 * with INVALID, fetch all interrupt states
1703 * until seeing either an INVALID or a
1704 * real interrupt condition.
1705 *
1706 * When running on a dumb old NE765, give
1707 * up immediately. The controller will
1708 * provide up to four dummy RC interrupt
1709 * conditions right after reset (for the
1710 * corresponding four drives), so this is
1711 * our only chance to get notice that it
1712 * was not the FDC that caused the interrupt.
1713 */
1714 if (fd_sense_int(fdc, &st0, &cyl)
1715 == FD_NOT_VALID)
1716 return 0;
1717 if(fdc->fdct == FDC_NE765
1718 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1719 return 0; /* hope for a real intr */
1720 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1721
1722 if (0 == descyl) {
1723 int failed = 0;
1724 /*
1725 * seek to cyl 0 requested; make sure we are
1726 * really there
1727 */
1728 if (fd_sense_drive_status(fdc, &st3))
1729 failed = 1;
1730 if ((st3 & NE7_ST3_T0) == 0) {
1731 printf(
1732 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1733 fdu, st3, NE7_ST3BITS);
1734 failed = 1;
1735 }
1736
1737 if (failed) {
1738 if(fdc->retry < 3)
1739 fdc->retry = 3;
1740 return (retrier(fdc));
1741 }
1742 }
1743
1744 if (cyl != descyl) {
1745 printf(
1746 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1747 fdu, descyl, cyl, st0);
1748 if (fdc->retry < 3)
1749 fdc->retry = 3;
1750 return (retrier(fdc));
1751 }
1752 }
1753
1754 fd->track = b_cylinder;
1755 if (!(fdc->flags & FDC_NODMA))
1756 isa_dmastart(bp->b_flags, bp->b_data+fd->skip,
1757 format ? bp->b_bcount : fdblk, fdc->dmachan);
1758 sectrac = fd->ft->sectrac;
1759 sec = blknum % (sectrac * fd->ft->heads);
1760 head = sec / sectrac;
1761 sec = sec % sectrac + 1;
1762 fd->hddrv = ((head&1)<<2)+fdu;
1763
1764 if(format || !read)
1765 {
1766 /* make sure the drive is writable */
1767 if(fd_sense_drive_status(fdc, &st3) != 0)
1768 {
1769 /* stuck controller? */
1770 if (!(fdc->flags & FDC_NODMA))
1771 isa_dmadone(bp->b_flags,
1772 bp->b_data + fd->skip,
1773 format ? bp->b_bcount : fdblk,
1774 fdc->dmachan);
1775 fdc->retry = 6; /* reset the beast */
1776 return (retrier(fdc));
1777 }
1778 if(st3 & NE7_ST3_WP)
1779 {
1780 /*
1781 * XXX YES! this is ugly.
1782 * in order to force the current operation
1783 * to fail, we will have to fake an FDC
1784 * error - all error handling is done
1785 * by the retrier()
1786 */
1787 fdc->status[0] = NE7_ST0_IC_AT;
1788 fdc->status[1] = NE7_ST1_NW;
1789 fdc->status[2] = 0;
1790 fdc->status[3] = fd->track;
1791 fdc->status[4] = head;
1792 fdc->status[5] = sec;
1793 fdc->retry = 8; /* break out immediately */
1794 fdc->state = IOTIMEDOUT; /* not really... */
1795 return (1);
1796 }
1797 }
1798
1799 if (format) {
1800 if (fdc->flags & FDC_NODMA) {
1801 /*
1802 * This seems to be necessary for
1803 * whatever obscure reason; if we omit
1804 * it, we end up filling the sector ID
1805 * fields of the newly formatted track
1806 * entirely with garbage, causing
1807 * `wrong cylinder' errors all over
1808 * the place when trying to read them
1809 * back.
1810 *
1811 * Umpf.
1812 */
1813 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1814
1815 (void)fdcpio(fdc,bp->b_flags,
1816 bp->b_data+fd->skip,
1817 bp->b_bcount);
1818
1819 }
1820 /* formatting */
1821 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1822 finfo->fd_formb_secshift,
1823 finfo->fd_formb_nsecs,
1824 finfo->fd_formb_gaplen,
1825 finfo->fd_formb_fillbyte, 0)) {
1826 /* controller fell over */
1827 if (!(fdc->flags & FDC_NODMA))
1828 isa_dmadone(bp->b_flags,
1829 bp->b_data + fd->skip,
1830 format ? bp->b_bcount : fdblk,
1831 fdc->dmachan);
1832 fdc->retry = 6;
1833 return (retrier(fdc));
1834 }
1835 } else {
1836 if (fdc->flags & FDC_NODMA) {
1837 /*
1838 * this seems to be necessary even when
1839 * reading data
1840 */
1841 SET_BCDR(fdc, 1, fdblk, 0);
1842
1843 /*
1844 * perform the write pseudo-DMA before
1845 * the WRITE command is sent
1846 */
1847 if (!read)
1848 (void)fdcpio(fdc,bp->b_flags,
1849 bp->b_data+fd->skip,
1850 fdblk);
1851 }
1852 if (fd_cmd(fdc, 9,
1853 (read ? NE7CMD_READ : NE7CMD_WRITE),
1854 head << 2 | fdu, /* head & unit */
1855 fd->track, /* track */
1856 head,
1857 sec, /* sector + 1 */
1858 fd->ft->secsize, /* sector size */
1859 sectrac, /* sectors/track */
1860 fd->ft->gap, /* gap size */
1861 fd->ft->datalen, /* data length */
1862 0)) {
1863 /* the beast is sleeping again */
1864 if (!(fdc->flags & FDC_NODMA))
1865 isa_dmadone(bp->b_flags,
1866 bp->b_data + fd->skip,
1867 format ? bp->b_bcount : fdblk,
1868 fdc->dmachan);
1869 fdc->retry = 6;
1870 return (retrier(fdc));
1871 }
1872 }
1873 if (fdc->flags & FDC_NODMA)
1874 /*
1875 * if this is a read, then simply await interrupt
1876 * before performing PIO
1877 */
1878 if (read && !fdcpio(fdc,bp->b_flags,
1879 bp->b_data+fd->skip,fdblk)) {
e8b273ff
MD
1880 callout_reset(&fd->tohandle, hz,
1881 fd_iotimeout, fdc);
984263bc
MD
1882 return(0); /* will return later */
1883 };
1884
1885 /*
1886 * write (or format) operation will fall through and
1887 * await completion interrupt
1888 */
1889 fdc->state = IOCOMPLETE;
e8b273ff 1890 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
984263bc
MD
1891 return (0); /* will return later */
1892 case PIOREAD:
1893 /*
1894 * actually perform the PIO read. The IOCOMPLETE case
1895 * removes the timeout for us.
1896 */
1897 (void)fdcpio(fdc,bp->b_flags,bp->b_data+fd->skip,fdblk);
1898 fdc->state = IOCOMPLETE;
1899 /* FALLTHROUGH */
1900 case IOCOMPLETE: /* IO DONE, post-analyze */
e8b273ff 1901 callout_stop(&fd->tohandle);
984263bc
MD
1902
1903 if (fd_read_status(fdc, fd->fdsu)) {
1904 if (!(fdc->flags & FDC_NODMA))
1905 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1906 format ? bp->b_bcount : fdblk,
1907 fdc->dmachan);
1908 if (fdc->retry < 6)
1909 fdc->retry = 6; /* force a reset */
1910 return (retrier(fdc));
1911 }
1912
1913 fdc->state = IOTIMEDOUT;
1914
1915 /* FALLTHROUGH */
1916
1917 case IOTIMEDOUT:
1918 if (!(fdc->flags & FDC_NODMA))
1919 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1920 format ? bp->b_bcount : fdblk, fdc->dmachan);
1921 if (fdc->status[0] & NE7_ST0_IC) {
1922 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1923 && fdc->status[1] & NE7_ST1_OR) {
1924 /*
1925 * DMA overrun. Someone hogged the bus and
1926 * didn't release it in time for the next
1927 * FDC transfer.
1928 *
1929 * We normally restart this without bumping
1930 * the retry counter. However, in case
1931 * something is seriously messed up (like
1932 * broken hardware), we rather limit the
1933 * number of retries so the IO operation
1934 * doesn't block indefinately.
1935 */
1936 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
1937 fdc->state = SEEKCOMPLETE;
1938 return (1);
1939 } /* else fall through */
1940 }
1941 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
1942 && fdc->retry < 6)
1943 fdc->retry = 6; /* force a reset */
1944 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1945 && fdc->status[2] & NE7_ST2_WC
1946 && fdc->retry < 3)
1947 fdc->retry = 3; /* force recalibrate */
1948 return (retrier(fdc));
1949 }
1950 /* All OK */
1951 /* Operation successful, retry DMA overruns again next time. */
1952 fdc->dma_overruns = 0;
1953 fd->skip += fdblk;
1954 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
1955 /* set up next transfer */
1956 fdc->state = DOSEEK;
1957 } else {
1958 /* ALL DONE */
1959 fd->skip = 0;
1960 fdc->bp = NULL;
1961 device_unbusy(fd->dev);
1962 devstat_end_transaction_buf(&fd->device_stats, bp);
1963 biodone(bp);
1964 fdc->fd = (fd_p) 0;
1965 fdc->fdu = -1;
1966 fdc->state = FINDWORK;
1967 }
1968 return (1);
1969 case RESETCTLR:
1970 fdc_reset(fdc);
1971 fdc->retry++;
1972 fdc->state = RESETCOMPLETE;
1973 return (0);
1974 case RESETCOMPLETE:
1975 /*
1976 * Discard all the results from the reset so that they
1977 * can't cause an unexpected interrupt later.
1978 */
1979 for (i = 0; i < 4; i++)
1980 (void)fd_sense_int(fdc, &st0, &cyl);
1981 fdc->state = STARTRECAL;
1982 /* Fall through. */
1983 case STARTRECAL:
1984 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
1985 /* arrgl */
1986 fdc->retry = 6;
1987 return (retrier(fdc));
1988 }
1989 fdc->state = RECALWAIT;
1990 return (0); /* will return later */
1991 case RECALWAIT:
1992 /* allow heads to settle */
1993 timeout(fd_pseudointr, fdc, hz / 8);
1994 fdc->state = RECALCOMPLETE;
1995 return (0); /* will return later */
1996 case RECALCOMPLETE:
1997 do {
1998 /*
1999 * See SEEKCOMPLETE for a comment on this:
2000 */
2001 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2002 return 0;
2003 if(fdc->fdct == FDC_NE765
2004 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2005 return 0; /* hope for a real intr */
2006 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2007 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2008 {
2009 if(fdc->retry > 3)
2010 /*
2011 * a recalibrate from beyond cylinder 77
2012 * will "fail" due to the FDC limitations;
2013 * since people used to complain much about
2014 * the failure message, try not logging
2015 * this one if it seems to be the first
2016 * time in a line
2017 */
2018 printf("fd%d: recal failed ST0 %b cyl %d\n",
2019 fdu, st0, NE7_ST0BITS, cyl);
2020 if(fdc->retry < 3) fdc->retry = 3;
2021 return (retrier(fdc));
2022 }
2023 fd->track = 0;
2024 /* Seek (probably) necessary */
2025 fdc->state = DOSEEK;
2026 return (1); /* will return immediatly */
2027 case MOTORWAIT:
2028 if(fd->flags & FD_MOTOR_WAIT)
2029 {
2030 return (0); /* time's not up yet */
2031 }
2032 if (fdc->flags & FDC_NEEDS_RESET) {
2033 fdc->state = RESETCTLR;
2034 fdc->flags &= ~FDC_NEEDS_RESET;
2035 } else {
2036 /*
2037 * If all motors were off, then the controller was
2038 * reset, so it has lost track of the current
2039 * cylinder. Recalibrate to handle this case.
2040 * But first, discard the results of the reset.
2041 */
2042 fdc->state = RESETCOMPLETE;
2043 }
2044 return (1); /* will return immediatly */
2045 default:
2046 device_printf(fdc->fdc_dev, "unexpected FD int->");
2047 if (fd_read_status(fdc, fd->fdsu) == 0)
2048 printf("FDC status :%x %x %x %x %x %x %x ",
2049 fdc->status[0],
2050 fdc->status[1],
2051 fdc->status[2],
2052 fdc->status[3],
2053 fdc->status[4],
2054 fdc->status[5],
2055 fdc->status[6] );
2056 else
2057 printf("No status available ");
2058 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2059 {
2060 printf("[controller is dead now]\n");
2061 return (0);
2062 }
2063 printf("ST0 = %x, PCN = %x\n", st0, cyl);
2064 return (0);
2065 }
2066 /*XXX confusing: some branches return immediately, others end up here*/
2067 return (1); /* Come back immediatly to new state */
2068}
2069
2070static int
2071retrier(struct fdc_data *fdc)
2072{
3a1b0fdc 2073 struct buf *bp;
984263bc
MD
2074 struct fd_data *fd;
2075 int fdu;
2076
2077 bp = fdc->bp;
2078
2079 /* XXX shouldn't this be cached somewhere? */
2080 fdu = FDUNIT(minor(bp->b_dev));
2081 fd = devclass_get_softc(fd_devclass, fdu);
2082 if (fd->options & FDOPT_NORETRY)
2083 goto fail;
2084
2085 switch (fdc->retry) {
2086 case 0: case 1: case 2:
2087 fdc->state = SEEKCOMPLETE;
2088 break;
2089 case 3: case 4: case 5:
2090 fdc->state = STARTRECAL;
2091 break;
2092 case 6:
2093 fdc->state = RESETCTLR;
2094 break;
2095 case 7:
2096 break;
2097 default:
2098 fail:
2099 {
2100 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
984263bc 2101
e4c9c0c8 2102 if (printerror) {
ee3ad2c9
MD
2103 /*
2104 * note: use the correct device for more
2105 * verbose error reporting.
2106 */
2107 dev_t subdev;
2108
2109 subdev = make_sub_dev(bp->b_dev,
984263bc 2110 (FDUNIT(minor(bp->b_dev))<<3)|RAW_PART);
ee3ad2c9
MD
2111 diskerr(bp, subdev,
2112 "hard error", LOG_PRINTF,
984263bc
MD
2113 fdc->fd->skip / DEV_BSIZE,
2114 (struct disklabel *)NULL);
e4c9c0c8 2115 }
984263bc
MD
2116 if (printerror) {
2117 if (fdc->flags & FDC_STAT_VALID)
2118 printf(
2119 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2120 fdc->status[0], NE7_ST0BITS,
2121 fdc->status[1], NE7_ST1BITS,
2122 fdc->status[2], NE7_ST2BITS,
2123 fdc->status[3], fdc->status[4],
2124 fdc->status[5]);
2125 else
2126 printf(" (No status)\n");
2127 }
2128 }
2129 bp->b_flags |= B_ERROR;
2130 bp->b_error = EIO;
2131 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2132 fdc->bp = NULL;
2133 fdc->fd->skip = 0;
2134 device_unbusy(fd->dev);
2135 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2136 biodone(bp);
2137 fdc->state = FINDWORK;
2138 fdc->flags |= FDC_NEEDS_RESET;
2139 fdc->fd = (fd_p) 0;
2140 fdc->fdu = -1;
2141 return (1);
2142 }
2143 fdc->retry++;
2144 return (1);
2145}
2146
2147static int
41c20dac 2148fdformat(dev_t dev, struct fd_formb *finfo, struct thread *td)
984263bc 2149{
41c20dac 2150 struct proc *p = td->td_proc;
984263bc
MD
2151 fdu_t fdu;
2152 fd_p fd;
2153
2154 struct buf *bp;
2155 int rv = 0, s;
2156 size_t fdblk;
2157
2158 fdu = FDUNIT(minor(dev));
2159 fd = devclass_get_softc(fd_devclass, fdu);
2160 fdblk = 128 << fd->ft->secsize;
2161
2162 /* set up a buffer header for fdstrategy() */
3aed1355
MD
2163 bp = malloc(sizeof(struct buf), M_TEMP, M_WAITOK | M_ZERO);
2164
984263bc
MD
2165 /*
2166 * keep the process from being swapped
2167 */
2168 PHOLD(p);
984263bc
MD
2169 BUF_LOCKINIT(bp);
2170 BUF_LOCK(bp, LK_EXCLUSIVE);
2171 bp->b_flags = B_PHYS | B_FORMAT;
2172
2173 /*
2174 * calculate a fake blkno, so fdstrategy() would initiate a
2175 * seek to the requested cylinder
2176 */
2177 bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
2178 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
2179
2180 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2181 bp->b_data = (caddr_t)finfo;
2182
2183 /* now do the format */
2184 bp->b_dev = dev;
2185 BUF_STRATEGY(bp, 0);
2186
2187 /* ...and wait for it to complete */
2188 s = splbio();
2189 while(!(bp->b_flags & B_DONE)) {
377d4740 2190 rv = tsleep((caddr_t)bp, 0, "fdform", 20 * hz);
984263bc
MD
2191 if (rv == EWOULDBLOCK)
2192 break;
2193 }
2194 splx(s);
2195
2196 if (rv == EWOULDBLOCK) {
2197 /* timed out */
2198 rv = EIO;
2199 device_unbusy(fd->dev);
2200 biodone(bp);
2201 }
2202 if (bp->b_flags & B_ERROR)
2203 rv = bp->b_error;
2204 /*
2205 * allow the process to be swapped
2206 */
2207 PRELE(p);
2208 BUF_UNLOCK(bp);
2209 BUF_LOCKFREE(bp);
2210 free(bp, M_TEMP);
2211 return rv;
2212}
2213
2214/*
2215 * TODO: don't allocate buffer on stack.
2216 */
2217
2218static int
41c20dac 2219fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
984263bc
MD
2220{
2221 fdu_t fdu = FDUNIT(minor(dev));
2222 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2223 size_t fdblk;
2224
2225 struct fd_type *fdt;
2226 struct disklabel *dl;
2227 struct fdc_status *fsp;
2228 char buffer[DEV_BSIZE];
2229 int error = 0;
2230
2231 fdblk = 128 << fd->ft->secsize;
2232
2233 switch (cmd) {
2234 case DIOCGDINFO:
2235 bzero(buffer, sizeof (buffer));
2236 dl = (struct disklabel *)buffer;
2237 dl->d_secsize = fdblk;
2238 fdt = fd->ft;
2239 dl->d_secpercyl = fdt->size / fdt->tracks;
2240 dl->d_type = DTYPE_FLOPPY;
2241
2242 if (readdisklabel(dev, dl)
2243 == NULL)
2244 error = 0;
2245 else
2246 error = EINVAL;
2247
2248 *(struct disklabel *)addr = *dl;
2249 break;
2250
2251 case DIOCSDINFO:
2252 if ((flag & FWRITE) == 0)
2253 error = EBADF;
2254 break;
2255
2256 case DIOCWLABEL:
2257 if ((flag & FWRITE) == 0)
2258 error = EBADF;
2259 break;
2260
2261 case DIOCWDINFO:
2262 if ((flag & FWRITE) == 0) {
2263 error = EBADF;
2264 break;
2265 }
2266
2267 dl = (struct disklabel *)addr;
2268
2269 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2270 (u_long)0)) != 0)
2271 break;
2272
2273 error = writedisklabel(dev, (struct disklabel *)buffer);
2274 break;
2275 case FD_FORM:
2276 if ((flag & FWRITE) == 0)
2277 error = EBADF; /* must be opened for writing */
2278 else if (((struct fd_formb *)addr)->format_version !=
2279 FD_FORMAT_VERSION)
2280 error = EINVAL; /* wrong version of formatting prog */
2281 else
41c20dac 2282 error = fdformat(dev, (struct fd_formb *)addr, td);
984263bc
MD
2283 break;
2284
2285 case FD_GTYPE: /* get drive type */
2286 *(struct fd_type *)addr = *fd->ft;
2287 break;
2288
2289 case FD_STYPE: /* set drive type */
2290 /* this is considered harmful; only allow for superuser */
dadab5e9 2291 if (suser(td) != 0)
984263bc
MD
2292 return EPERM;
2293 *fd->ft = *(struct fd_type *)addr;
2294 break;
2295
2296 case FD_GOPTS: /* get drive options */
2297 *(int *)addr = fd->options;
2298 break;
2299
2300 case FD_SOPTS: /* set drive options */
2301 fd->options = *(int *)addr;
2302 break;
2303
2304 case FD_GSTAT:
2305 fsp = (struct fdc_status *)addr;
2306 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2307 return EINVAL;
2308 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2309 break;
2310
2311 default:
2312 error = ENOTTY;
2313 break;
2314 }
2315 return (error);
2316}
2317
2318/*
2319 * Hello emacs, these are the
2320 * Local Variables:
2321 * c-indent-level: 8
2322 * c-continued-statement-offset: 8
2323 * c-continued-brace-offset: 0
2324 * c-brace-offset: -8
2325 * c-brace-imaginary-offset: 0
2326 * c-argdecl-indent: 8
2327 * c-label-offset: -8
2328 * c++-hanging-braces: 1
2329 * c++-access-specifier-offset: -8
2330 * c++-empty-arglist-indent: 8
2331 * c++-friend-offset: 0
2332 * End:
2333 */