Add missing commit for the VM load heuristic and page allocation rate
[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 $
81b5c339 54 * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.25 2006/02/17 19:17:57 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
3020e3be 81#include <sys/buf2.h>
fbe276c7 82#include <sys/thread2.h>
3020e3be 83
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84#include <machine/clock.h>
85#include <machine/ioctl_fd.h>
86#include <machine/resource.h>
87#include <machine/stdarg.h>
88
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89#include <bus/isa/isavar.h>
90#include <bus/isa/isareg.h>
91#include "fdreg.h"
92#include "fdc.h"
93#include <bus/isa/rtc.h>
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94
95/* misuse a flag to identify format operation */
96#define B_FORMAT B_XXX
97
98/* configuration flags */
99#define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
100#define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
101
102/* internally used only, not really from CMOS: */
103#define RTCFDT_144M_PRETENDED 0x1000
104
105/* error returns for fd_cmd() */
106#define FD_FAILED -1
107#define FD_NOT_VALID -2
108#define FDC_ERRMAX 100 /* do not log more */
109/*
110 * Stop retrying after this many DMA overruns. Since each retry takes
111 * one revolution, with 300 rpm., 25 retries take approximately 10
112 * seconds which the read attempt will block in case the DMA overrun
113 * is persistent.
114 */
115#define FDC_DMAOV_MAX 25
116
117/*
118 * Timeout value for the PIO loops to wait until the FDC main status
119 * register matches our expectations (request for master, direction
120 * bit). This is supposed to be a number of microseconds, although
121 * timing might actually not be very accurate.
122 *
123 * Timeouts of 100 msec are believed to be required for some broken
124 * (old) hardware.
125 */
126#define FDSTS_TIMEOUT 100000
127
128#define NUMTYPES 17
129#define NUMDENS (NUMTYPES - 7)
130
131/* These defines (-1) must match index for fd_types */
132#define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
133#define NO_TYPE 0 /* must match NO_TYPE in ft.c */
134#define FD_1720 1
135#define FD_1480 2
136#define FD_1440 3
137#define FD_1200 4
138#define FD_820 5
139#define FD_800 6
140#define FD_720 7
141#define FD_360 8
142#define FD_640 9
143#define FD_1232 10
144
145#define FD_1480in5_25 11
146#define FD_1440in5_25 12
147#define FD_820in5_25 13
148#define FD_800in5_25 14
149#define FD_720in5_25 15
150#define FD_360in5_25 16
151#define FD_640in5_25 17
152
153
154static struct fd_type fd_types[NUMTYPES] =
155{
156{ 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
157{ 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
158{ 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
159{ 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
160{ 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
161{ 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
162{ 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
163{ 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
164{ 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
165{ 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
166
167{ 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
168{ 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
169{ 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
170{ 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
171{ 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
172{ 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
173{ 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
174};
175
176#define DRVS_PER_CTLR 2 /* 2 floppies */
177
178/***********************************************************************\
179* Per controller structure. *
180\***********************************************************************/
8c5c0470 181devclass_t fdc_devclass;
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182
183/***********************************************************************\
184* Per drive structure. *
185* N per controller (DRVS_PER_CTLR) *
186\***********************************************************************/
187struct fd_data {
188 struct fdc_data *fdc; /* pointer to controller structure */
189 int fdsu; /* this units number on this controller */
190 int type; /* Drive type (FD_1440...) */
191 struct fd_type *ft; /* pointer to the type descriptor */
192 int flags;
193#define FD_OPEN 0x01 /* it's open */
194#define FD_ACTIVE 0x02 /* it's active */
195#define FD_MOTOR 0x04 /* motor should be on */
196#define FD_MOTOR_WAIT 0x08 /* motor coming up */
197 int skip;
198 int hddrv;
199#define FD_NO_TRACK -2
200 int track; /* where we think the head is */
201 int options; /* user configurable options, see ioctl_fd.h */
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202 struct callout toffhandle;
203 struct callout tohandle;
4fc46503 204 struct callout motor;
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205 struct devstat device_stats;
206 device_t dev;
207 fdu_t fdu;
208};
209
210struct fdc_ivars {
211 int fdunit;
212};
213static devclass_t fd_devclass;
214
215/***********************************************************************\
216* Throughout this file the following conventions will be used: *
217* fd is a pointer to the fd_data struct for the drive in question *
218* fdc is a pointer to the fdc_data struct for the controller *
219* fdu is the floppy drive unit number *
220* fdcu is the floppy controller unit number *
221* fdsu is the floppy drive unit number on that controller. (sub-unit) *
222\***********************************************************************/
223
224/* internal functions */
225static void fdc_intr(void *);
226static void set_motor(struct fdc_data *, int, int);
227# define TURNON 1
228# define TURNOFF 0
229static timeout_t fd_turnoff;
230static timeout_t fd_motor_on;
231static void fd_turnon(struct fd_data *);
232static void fdc_reset(fdc_p);
233static int fd_in(struct fdc_data *, int *);
234static int out_fdc(struct fdc_data *, int);
235static void fdstart(struct fdc_data *);
236static timeout_t fd_iotimeout;
237static timeout_t fd_pseudointr;
238static int fdstate(struct fdc_data *);
239static int retrier(struct fdc_data *);
41c20dac 240static int fdformat(dev_t, struct fd_formb *, struct thread *);
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241
242static int enable_fifo(fdc_p fdc);
243
244static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
245
246
247#define DEVIDLE 0
248#define FINDWORK 1
249#define DOSEEK 2
250#define SEEKCOMPLETE 3
251#define IOCOMPLETE 4
252#define RECALCOMPLETE 5
253#define STARTRECAL 6
254#define RESETCTLR 7
255#define SEEKWAIT 8
256#define RECALWAIT 9
257#define MOTORWAIT 10
258#define IOTIMEDOUT 11
259#define RESETCOMPLETE 12
260#define PIOREAD 13
261
262#ifdef FDC_DEBUG
263static char const * const fdstates[] =
264{
265"DEVIDLE",
266"FINDWORK",
267"DOSEEK",
268"SEEKCOMPLETE",
269"IOCOMPLETE",
270"RECALCOMPLETE",
271"STARTRECAL",
272"RESETCTLR",
273"SEEKWAIT",
274"RECALWAIT",
275"MOTORWAIT",
276"IOTIMEDOUT",
277"RESETCOMPLETE",
278"PIOREAD",
279};
280
281/* CAUTION: fd_debug causes huge amounts of logging output */
282static int volatile fd_debug = 0;
283#define TRACE0(arg) if(fd_debug) printf(arg)
284#define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2)
285#else /* FDC_DEBUG */
286#define TRACE0(arg)
287#define TRACE1(arg1, arg2)
288#endif /* FDC_DEBUG */
289
8c5c0470 290void
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291fdout_wr(fdc_p fdc, u_int8_t v)
292{
293 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
294}
295
296static u_int8_t
297fdsts_rd(fdc_p fdc)
298{
299 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
300}
301
302static void
303fddata_wr(fdc_p fdc, u_int8_t v)
304{
305 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
306}
307
308static u_int8_t
309fddata_rd(fdc_p fdc)
310{
311 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
312}
313
314static void
315fdctl_wr_isa(fdc_p fdc, u_int8_t v)
316{
317 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
318}
319
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320#if 0
321
322static u_int8_t
323fdin_rd(fdc_p fdc)
324{
325 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
326}
327
328#endif
329
330static d_open_t Fdopen; /* NOTE, not fdopen */
331static d_close_t fdclose;
332static d_ioctl_t fdioctl;
333static d_strategy_t fdstrategy;
334
984263bc 335static struct cdevsw fd_cdevsw = {
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336 /* name */ "fd",
337 /* maj */ FD_CDEV_MAJOR,
338 /* flags */ D_DISK,
339 /* port */ NULL,
455fcd7e 340 /* clone */ NULL,
fabb8ceb 341
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342 /* open */ Fdopen,
343 /* close */ fdclose,
344 /* read */ physread,
345 /* write */ physwrite,
346 /* ioctl */ fdioctl,
347 /* poll */ nopoll,
348 /* mmap */ nommap,
349 /* strategy */ fdstrategy,
984263bc 350 /* dump */ nodump,
fabb8ceb 351 /* psize */ nopsize
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352};
353
354static int
355fdc_err(struct fdc_data *fdc, const char *s)
356{
357 fdc->fdc_errs++;
358 if (s) {
359 if (fdc->fdc_errs < FDC_ERRMAX)
360 device_printf(fdc->fdc_dev, "%s", s);
361 else if (fdc->fdc_errs == FDC_ERRMAX)
362 device_printf(fdc->fdc_dev, "too many errors, not "
363 "logging any more\n");
364 }
365
366 return FD_FAILED;
367}
368
369/*
370 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
371 * Unit number,
372 * # of output bytes, output bytes as ints ...,
373 * # of input bytes, input bytes as ints ...
374 */
8c5c0470 375int
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376fd_cmd(struct fdc_data *fdc, int n_out, ...)
377{
378 u_char cmd;
379 int n_in;
380 int n;
e2565a42 381 __va_list ap;
984263bc 382
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383 __va_start(ap, n_out);
384 cmd = (u_char)(__va_arg(ap, int));
385 __va_end(ap);
386 __va_start(ap, n_out);
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387 for (n = 0; n < n_out; n++)
388 {
e2565a42 389 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
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390 {
391 char msg[50];
392 snprintf(msg, sizeof(msg),
393 "cmd %x failed at out byte %d of %d\n",
394 cmd, n + 1, n_out);
395 return fdc_err(fdc, msg);
396 }
397 }
e2565a42 398 n_in = __va_arg(ap, int);
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399 for (n = 0; n < n_in; n++)
400 {
e2565a42 401 int *ptr = __va_arg(ap, int *);
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402 if (fd_in(fdc, ptr) < 0)
403 {
404 char msg[50];
405 snprintf(msg, sizeof(msg),
406 "cmd %02x failed at in byte %d of %d\n",
407 cmd, n + 1, n_in);
408 return fdc_err(fdc, msg);
409 }
410 }
411
412 return 0;
413}
414
415static int
416enable_fifo(fdc_p fdc)
417{
418 int i, j;
419
420 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
421
422 /*
423 * XXX:
424 * Cannot use fd_cmd the normal way here, since
425 * this might be an invalid command. Thus we send the
426 * first byte, and check for an early turn of data directon.
427 */
428
429 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
430 return fdc_err(fdc, "Enable FIFO failed\n");
431
432 /* If command is invalid, return */
433 j = FDSTS_TIMEOUT;
434 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
435 != NE7_RQM && j-- > 0) {
436 if (i == (NE7_DIO | NE7_RQM)) {
437 fdc_reset(fdc);
438 return FD_FAILED;
439 }
440 DELAY(1);
441 }
442 if (j<0 ||
443 fd_cmd(fdc, 3,
444 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
445 fdc_reset(fdc);
446 return fdc_err(fdc, "Enable FIFO failed\n");
447 }
448 fdc->flags |= FDC_HAS_FIFO;
449 return 0;
450 }
451 if (fd_cmd(fdc, 4,
452 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
453 return fdc_err(fdc, "Re-enable FIFO failed\n");
454 return 0;
455}
456
457static int
458fd_sense_drive_status(fdc_p fdc, int *st3p)
459{
460 int st3;
461
462 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
463 {
464 return fdc_err(fdc, "Sense Drive Status failed\n");
465 }
466 if (st3p)
467 *st3p = st3;
468
469 return 0;
470}
471
472static int
473fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
474{
475 int cyl, st0, ret;
476
477 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
478 if (ret) {
479 (void)fdc_err(fdc,
480 "sense intr err reading stat reg 0\n");
481 return ret;
482 }
483
484 if (st0p)
485 *st0p = st0;
486
487 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
488 /*
489 * There doesn't seem to have been an interrupt.
490 */
491 return FD_NOT_VALID;
492 }
493
494 if (fd_in(fdc, &cyl) < 0) {
495 return fdc_err(fdc, "can't get cyl num\n");
496 }
497
498 if (cylp)
499 *cylp = cyl;
500
501 return 0;
502}
503
504
505static int
506fd_read_status(fdc_p fdc, int fdsu)
507{
508 int i, ret;
509
510 for (i = 0; i < 7; i++) {
511 /*
512 * XXX types are poorly chosen. Only bytes can by read
513 * from the hardware, but fdc->status[] wants u_ints and
514 * fd_in() gives ints.
515 */
516 int status;
517
518 ret = fd_in(fdc, &status);
519 fdc->status[i] = status;
520 if (ret != 0)
521 break;
522 }
523
524 if (ret == 0)
525 fdc->flags |= FDC_STAT_VALID;
526 else
527 fdc->flags &= ~FDC_STAT_VALID;
528
529 return ret;
530}
531
532/****************************************************************************/
533/* autoconfiguration stuff */
534/****************************************************************************/
535
8c5c0470 536int
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537fdc_alloc_resources(struct fdc_data *fdc)
538{
539 device_t dev;
540 int ispnp, ispcmcia;
541
542 dev = fdc->fdc_dev;
543 ispnp = (fdc->flags & FDC_ISPNP) != 0;
544 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
545 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
546 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
547
548 /*
549 * On standard ISA, we don't just use an 8 port range
550 * (e.g. 0x3f0-0x3f7) since that covers an IDE control
551 * register at 0x3f6.
552 *
553 * Isn't PC hardware wonderful.
554 *
555 * The Y-E Data PCMCIA FDC doesn't have this problem, it
556 * uses the register with offset 6 for pseudo-DMA, and the
557 * one with offset 7 as control register.
558 */
559 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
560 &fdc->rid_ioport, 0ul, ~0ul,
561 ispcmcia ? 8 : (ispnp ? 1 : 6),
562 RF_ACTIVE);
563 if (fdc->res_ioport == 0) {
564 device_printf(dev, "cannot reserve I/O port range\n");
565 return ENXIO;
566 }
567 fdc->portt = rman_get_bustag(fdc->res_ioport);
568 fdc->porth = rman_get_bushandle(fdc->res_ioport);
569
570 if (!ispcmcia) {
571 /*
572 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
573 * and some at 0x3f0-0x3f5,0x3f7. We detect the former
574 * by checking the size and adjust the port address
575 * accordingly.
576 */
577 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
578 fdc->port_off = -2;
579
580 /*
581 * Register the control port range as rid 1 if it
582 * isn't there already. Most PnP BIOSen will have
583 * already done this but non-PnP configurations don't.
584 *
585 * And some (!!) report 0x3f2-0x3f5 and completely
586 * leave out the control register! It seems that some
587 * non-antique controller chips have a different
588 * method of programming the transfer speed which
589 * doesn't require the control register, but it's
590 * mighty bogus as the chip still responds to the
591 * address for the control register.
592 */
593 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
594 u_long ctlstart;
595
596 /* Find the control port, usually 0x3f7 */
597 ctlstart = rman_get_start(fdc->res_ioport) +
598 fdc->port_off + 7;
599
600 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
601 }
602
603 /*
604 * Now (finally!) allocate the control port.
605 */
606 fdc->rid_ctl = 1;
607 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
608 &fdc->rid_ctl,
609 0ul, ~0ul, 1, RF_ACTIVE);
610 if (fdc->res_ctl == 0) {
611 device_printf(dev,
612 "cannot reserve control I/O port range\n");
613 return ENXIO;
614 }
615 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
616 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
617 }
618
619 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
620 &fdc->rid_irq, 0ul, ~0ul, 1,
621 RF_ACTIVE);
622 if (fdc->res_irq == 0) {
623 device_printf(dev, "cannot reserve interrupt line\n");
624 return ENXIO;
625 }
626
627 if ((fdc->flags & FDC_NODMA) == 0) {
628 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
629 &fdc->rid_drq, 0ul, ~0ul, 1,
630 RF_ACTIVE);
631 if (fdc->res_drq == 0) {
632 device_printf(dev, "cannot reserve DMA request line\n");
633 return ENXIO;
634 }
635 fdc->dmachan = fdc->res_drq->r_start;
636 }
637
638 return 0;
639}
640
8c5c0470 641void
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642fdc_release_resources(struct fdc_data *fdc)
643{
644 device_t dev;
645
646 dev = fdc->fdc_dev;
647 if (fdc->res_irq != 0) {
648 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
649 fdc->res_irq);
650 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
651 fdc->res_irq);
652 }
653 if (fdc->res_ctl != 0) {
654 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
655 fdc->res_ctl);
656 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
657 fdc->res_ctl);
658 }
659 if (fdc->res_ioport != 0) {
660 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
661 fdc->res_ioport);
662 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
663 fdc->res_ioport);
664 }
665 if (fdc->res_drq != 0) {
666 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
667 fdc->res_drq);
668 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
669 fdc->res_drq);
670 }
671}
672
673/****************************************************************************/
674/* autoconfiguration stuff */
675/****************************************************************************/
676
677static struct isa_pnp_id fdc_ids[] = {
678 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
679 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
680 {0}
681};
682
8c5c0470 683int
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684fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
685{
686 struct fdc_ivars *ivars = device_get_ivars(child);
687
688 switch (which) {
689 case FDC_IVAR_FDUNIT:
690 *result = ivars->fdunit;
691 break;
692 default:
693 return ENOENT;
694 }
695 return 0;
696}
697
698/*
699 * fdc controller section.
700 */
701static int
702fdc_probe(device_t dev)
703{
704 int error, ic_type;
705 struct fdc_data *fdc;
706
707 fdc = device_get_softc(dev);
708 bzero(fdc, sizeof *fdc);
709 fdc->fdc_dev = dev;
710 fdc->fdctl_wr = fdctl_wr_isa;
711
712 /* Check pnp ids */
713 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
714 if (error == ENXIO)
715 return ENXIO;
716 if (error == 0)
717 fdc->flags |= FDC_ISPNP;
718
719 /* Attempt to allocate our resources for the duration of the probe */
720 error = fdc_alloc_resources(fdc);
721 if (error)
722 goto out;
723
724 /* First - lets reset the floppy controller */
725 fdout_wr(fdc, 0);
726 DELAY(100);
727 fdout_wr(fdc, FDO_FRST);
728
729 /* see if it can handle a command */
730 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
731 NE7_SPEC_2(2, 0), 0)) {
732 error = ENXIO;
733 goto out;
734 }
735
736 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
737 ic_type = (u_char)ic_type;
738 switch (ic_type) {
739 case 0x80:
740 device_set_desc(dev, "NEC 765 or clone");
741 fdc->fdct = FDC_NE765;
742 break;
743 case 0x81:
744 device_set_desc(dev, "Intel 82077 or clone");
745 fdc->fdct = FDC_I82077;
746 break;
747 case 0x90:
748 device_set_desc(dev, "NEC 72065B or clone");
749 fdc->fdct = FDC_NE72065;
750 break;
751 default:
752 device_set_desc(dev, "generic floppy controller");
753 fdc->fdct = FDC_UNKNOWN;
754 break;
755 }
756 }
757
758out:
759 fdc_release_resources(fdc);
760 return (error);
761}
762
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763/*
764 * Add a child device to the fdc controller. It will then be probed etc.
765 */
766static void
767fdc_add_child(device_t dev, const char *name, int unit)
768{
769 int disabled;
770 struct fdc_ivars *ivar;
771 device_t child;
772
3aed1355 773 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
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774 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
775 ivar->fdunit = 0;
776 child = device_add_child(dev, name, unit);
777 if (child == NULL)
778 return;
779 device_set_ivars(child, ivar);
780 if (resource_int_value(name, unit, "disabled", &disabled) == 0
781 && disabled != 0)
782 device_disable(child);
783}
784
8c5c0470 785int
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786fdc_attach(device_t dev)
787{
788 struct fdc_data *fdc;
789 int i, error;
790
791 fdc = device_get_softc(dev);
8b97cf2a
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792
793 callout_init(&fdc->pseudointr_ch);
794
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795 error = fdc_alloc_resources(fdc);
796 if (error) {
797 device_printf(dev, "cannot re-aquire resources\n");
798 return error;
799 }
800 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
ee61f228 801 0, fdc_intr, fdc,
e9cb6d99 802 &fdc->fdc_intr, NULL);
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803 if (error) {
804 device_printf(dev, "cannot setup interrupt\n");
805 return error;
806 }
807 fdc->fdcu = device_get_unit(dev);
808 fdc->flags |= FDC_ATTACHED;
809
810 if ((fdc->flags & FDC_NODMA) == 0) {
811 /* Acquire the DMA channel forever, The driver will do the rest */
812 /* XXX should integrate with rman */
813 isa_dma_acquire(fdc->dmachan);
814 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
815 }
816 fdc->state = DEVIDLE;
817
818 /* reset controller, turn motor off, clear fdout mirror reg */
819 fdout_wr(fdc, ((fdc->fdout = 0)));
81b5c339 820 bioq_init(&fdc->bio_queue);
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821
822 /*
823 * Probe and attach any children. We should probably detect
824 * devices from the BIOS unless overridden.
825 */
826 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
827 i != -1;
828 i = resource_query_string(i, "at", device_get_nameunit(dev)))
829 fdc_add_child(dev, resource_query_name(i),
830 resource_query_unit(i));
831
832 return (bus_generic_attach(dev));
833}
834
8c5c0470 835int
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836fdc_print_child(device_t me, device_t child)
837{
838 int retval = 0;
839
840 retval += bus_print_child_header(me, child);
841 retval += printf(" on %s drive %d\n", device_get_nameunit(me),
842 fdc_get_fdunit(child));
843
844 return (retval);
845}
846
847static device_method_t fdc_methods[] = {
848 /* Device interface */
849 DEVMETHOD(device_probe, fdc_probe),
850 DEVMETHOD(device_attach, fdc_attach),
851 DEVMETHOD(device_detach, bus_generic_detach),
852 DEVMETHOD(device_shutdown, bus_generic_shutdown),
853 DEVMETHOD(device_suspend, bus_generic_suspend),
854 DEVMETHOD(device_resume, bus_generic_resume),
855
856 /* Bus interface */
857 DEVMETHOD(bus_print_child, fdc_print_child),
858 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
859 /* Our children never use any other bus interface methods. */
860
861 { 0, 0 }
862};
863
864static driver_t fdc_driver = {
865 "fdc",
866 fdc_methods,
867 sizeof(struct fdc_data)
868};
869
870DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
871
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872/******************************************************************/
873/*
874 * devices attached to the controller section.
875 */
876static int
877fd_probe(device_t dev)
878{
879 int i;
880 u_int fdt, st0, st3;
881 struct fd_data *fd;
882 struct fdc_data *fdc;
883 fdsu_t fdsu;
884 static int fd_fifo = 0;
885
886 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
887 fd = device_get_softc(dev);
888 fdc = device_get_softc(device_get_parent(dev));
889
890 bzero(fd, sizeof *fd);
891 fd->dev = dev;
892 fd->fdc = fdc;
893 fd->fdsu = fdsu;
894 fd->fdu = device_get_unit(dev);
895
896#ifdef __i386__
897 /* look up what bios thinks we have */
898 switch (fd->fdu) {
899 case 0:
900 if ((fdc->flags & FDC_ISPCMCIA))
901 fdt = RTCFDT_144M;
902 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
903 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
904 else
905 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
906 break;
907 case 1:
908 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
909 break;
910 default:
911 fdt = RTCFDT_NONE;
912 break;
913 }
914#else
915 fdt = RTCFDT_144M; /* XXX probably */
916#endif
917
918 /* is there a unit? */
919 if (fdt == RTCFDT_NONE)
920 return (ENXIO);
921
922 /* select it */
923 set_motor(fdc, fdsu, TURNON);
924 DELAY(1000000); /* 1 sec */
925
926 /* XXX This doesn't work before the first set_motor() */
927 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
928 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
929 && enable_fifo(fdc) == 0) {
930 device_printf(device_get_parent(dev),
931 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
932 }
933 fd_fifo = 1;
934
935 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
936 && (st3 & NE7_ST3_T0)) {
937 /* if at track 0, first seek inwards */
938 /* seek some steps: */
939 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
940 DELAY(300000); /* ...wait a moment... */
941 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
942 }
943
944 /* If we're at track 0 first seek inwards. */
945 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
946 /* Seek some steps... */
947 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
948 /* ...wait a moment... */
949 DELAY(300000);
950 /* make ctrlr happy: */
951 fd_sense_int(fdc, 0, 0);
952 }
953 }
954
955 for (i = 0; i < 2; i++) {
956 /*
957 * we must recalibrate twice, just in case the
958 * heads have been beyond cylinder 76, since most
959 * FDCs still barf when attempting to recalibrate
960 * more than 77 steps
961 */
962 /* go back to 0: */
963 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
964 /* a second being enough for full stroke seek*/
965 DELAY(i == 0 ? 1000000 : 300000);
966
967 /* anything responding? */
968 if (fd_sense_int(fdc, &st0, 0) == 0 &&
969 (st0 & NE7_ST0_EC) == 0)
970 break; /* already probed succesfully */
971 }
972 }
973
974 set_motor(fdc, fdsu, TURNOFF);
975
976 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
977 return (ENXIO);
978
979 fd->track = FD_NO_TRACK;
980 fd->fdc = fdc;
981 fd->fdsu = fdsu;
982 fd->options = 0;
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983 callout_init(&fd->toffhandle);
984 callout_init(&fd->tohandle);
4fc46503 985 callout_init(&fd->motor);
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986
987 switch (fdt) {
988 case RTCFDT_12M:
989 device_set_desc(dev, "1200-KB 5.25\" drive");
990 fd->type = FD_1200;
991 break;
992 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
993 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
994 fdt = RTCFDT_144M;
995 fd->type = FD_1440;
996 case RTCFDT_144M:
997 device_set_desc(dev, "1440-KB 3.5\" drive");
998 fd->type = FD_1440;
999 break;
1000 case RTCFDT_288M:
1001 case RTCFDT_288M_1:
1002 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
1003 fd->type = FD_1440;
1004 break;
1005 case RTCFDT_360K:
1006 device_set_desc(dev, "360-KB 5.25\" drive");
1007 fd->type = FD_360;
1008 break;
1009 case RTCFDT_720K:
1010 printf("720-KB 3.5\" drive");
1011 fd->type = FD_720;
1012 break;
1013 default:
1014 return (ENXIO);
1015 }
1016 return (0);
1017}
1018
1019static int
1020fd_attach(device_t dev)
1021{
1022 struct fd_data *fd;
1023#if 0
1024 int i;
1025 int mynor;
1026 int typemynor;
1027 int typesize;
1028#endif
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1029
1030 fd = device_get_softc(dev);
1031
e4c9c0c8 1032 cdevsw_add(&fd_cdevsw, -1 << 6, fd->fdu << 6);
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1033 make_dev(&fd_cdevsw, (fd->fdu << 6),
1034 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu);
1035
1036#if 0
1037 /* Other make_dev() go here. */
1038#endif
1039
1040 /*
1041 * Export the drive to the devstat interface.
1042 */
1043 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1044 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1045 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1046 DEVSTAT_PRIORITY_FD);
1047 return (0);
1048}
1049
1050static int
1051fd_detach(device_t dev)
1052{
1053 struct fd_data *fd;
1054
1055 fd = device_get_softc(dev);
e8b273ff 1056 callout_stop(&fd->toffhandle);
4fc46503 1057 callout_stop(&fd->motor);
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1058
1059 return (0);
1060}
1061
1062static device_method_t fd_methods[] = {
1063 /* Device interface */
1064 DEVMETHOD(device_probe, fd_probe),
1065 DEVMETHOD(device_attach, fd_attach),
1066 DEVMETHOD(device_detach, fd_detach),
1067 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1068 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1069 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1070
1071 { 0, 0 }
1072};
1073
1074static driver_t fd_driver = {
1075 "fd",
1076 fd_methods,
1077 sizeof(struct fd_data)
1078};
1079
1080DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1081
1082/****************************************************************************/
1083/* motor control stuff */
1084/* remember to not deselect the drive we're working on */
1085/****************************************************************************/
1086static void
1087set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1088{
1089 int fdout = fdc->fdout;
1090 int needspecify = 0;
1091
1092 if(turnon) {
1093 fdout &= ~FDO_FDSEL;
1094 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1095 } else
1096 fdout &= ~(FDO_MOEN0 << fdsu);
1097
1098 if(!turnon
1099 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1100 /* gonna turn off the last drive, put FDC to bed */
1101 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1102 else {
1103 /* make sure controller is selected and specified */
1104 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1105 needspecify = 1;
1106 fdout |= (FDO_FRST|FDO_FDMAEN);
1107 }
1108
1109 fdout_wr(fdc, fdout);
1110 fdc->fdout = fdout;
1111 TRACE1("[0x%x->FDOUT]", fdout);
1112
1113 if (needspecify) {
1114 /*
1115 * XXX
1116 * special case: since we have just woken up the FDC
1117 * from its sleep, we silently assume the command will
1118 * be accepted, and do not test for a timeout
1119 */
1120 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1121 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1122 0);
1123 if (fdc->flags & FDC_HAS_FIFO)
1124 (void) enable_fifo(fdc);
1125 }
1126}
1127
1128static void
1129fd_turnoff(void *xfd)
1130{
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1131 fd_p fd = xfd;
1132
1133 TRACE1("[fd%d: turnoff]", fd->fdu);
1134
fbe276c7 1135 crit_enter();
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1136 /*
1137 * Don't turn off the motor yet if the drive is active.
1138 *
1139 * If we got here, this could only mean we missed an interrupt.
1140 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1141 * after a controller reset. Just schedule a pseudo-interrupt
1142 * so the state machine gets re-entered.
1143 */
1144 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1145 fdc_intr(fd->fdc);
fbe276c7 1146 crit_exit();
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1147 return;
1148 }
1149
1150 fd->flags &= ~FD_MOTOR;
1151 set_motor(fd->fdc, fd->fdsu, TURNOFF);
fbe276c7 1152 crit_exit();
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1153}
1154
1155static void
1156fd_motor_on(void *xfd)
1157{
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1158 fd_p fd = xfd;
1159
fbe276c7 1160 crit_enter();
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1161 fd->flags &= ~FD_MOTOR_WAIT;
1162 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1163 {
1164 fdc_intr(fd->fdc);
1165 }
fbe276c7 1166 crit_exit();
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1167}
1168
1169static void
1170fd_turnon(fd_p fd)
1171{
1172 if(!(fd->flags & FD_MOTOR))
1173 {
1174 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1175 set_motor(fd->fdc, fd->fdsu, TURNON);
4fc46503 1176 callout_reset(&fd->motor, hz, fd_motor_on, fd);
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1177 }
1178}
1179
1180static void
1181fdc_reset(fdc_p fdc)
1182{
1183 /* Try a reset, keep motor on */
1184 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1185 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1186 DELAY(100);
1187 /* enable FDC, but defer interrupts a moment */
1188 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1189 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1190 DELAY(100);
1191 fdout_wr(fdc, fdc->fdout);
1192 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1193
1194 /* XXX after a reset, silently believe the FDC will accept commands */
1195 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1196 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1197 0);
1198 if (fdc->flags & FDC_HAS_FIFO)
1199 (void) enable_fifo(fdc);
1200}
1201
1202/****************************************************************************/
1203/* fdc in/out */
1204/****************************************************************************/
1205/*
1206 * FDC IO functions, take care of the main status register, timeout
1207 * in case the desired status bits are never set.
1208 *
1209 * These PIO loops initially start out with short delays between
1210 * each iteration in the expectation that the required condition
1211 * is usually met quickly, so it can be handled immediately. After
1212 * about 1 ms, stepping is increased to achieve a better timing
1213 * accuracy in the calls to DELAY().
1214 */
1215static int
1216fd_in(struct fdc_data *fdc, int *ptr)
1217{
1218 int i, j, step;
1219
1220 for (j = 0, step = 1;
1221 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1222 j < FDSTS_TIMEOUT;
1223 j += step) {
1224 if (i == NE7_RQM)
1225 return (fdc_err(fdc, "ready for output in input\n"));
1226 if (j == 1000)
1227 step = 1000;
1228 DELAY(step);
1229 }
1230 if (j >= FDSTS_TIMEOUT)
1231 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1232#ifdef FDC_DEBUG
1233 i = fddata_rd(fdc);
1234 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1235 *ptr = i;
1236 return (0);
1237#else /* !FDC_DEBUG */
1238 i = fddata_rd(fdc);
1239 if (ptr)
1240 *ptr = i;
1241 return (0);
1242#endif /* FDC_DEBUG */
1243}
1244
1245static int
1246out_fdc(struct fdc_data *fdc, int x)
1247{
1248 int i, j, step;
1249
1250 for (j = 0, step = 1;
1251 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1252 j < FDSTS_TIMEOUT;
1253 j += step) {
1254 if (i == (NE7_DIO|NE7_RQM))
1255 return (fdc_err(fdc, "ready for input in output\n"));
1256 if (j == 1000)
1257 step = 1000;
1258 DELAY(step);
1259 }
1260 if (j >= FDSTS_TIMEOUT)
1261 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1262
1263 /* Send the command and return */
1264 fddata_wr(fdc, x);
1265 TRACE1("[0x%x->FDDATA]", x);
1266 return (0);
1267}
1268
1269/****************************************************************************/
1270/* fdopen/fdclose */
1271/****************************************************************************/
1272int
41c20dac 1273Fdopen(dev_t dev, int flags, int mode, struct thread *td)
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1274{
1275 fdu_t fdu = FDUNIT(minor(dev));
1276 int type = FDTYPE(minor(dev));
1277 fd_p fd;
1278 fdc_p fdc;
1279
1280 /* check bounds */
1281 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1282 return (ENXIO);
1283 fdc = fd->fdc;
1284 if ((fdc == NULL) || (fd->type == NO_TYPE))
1285 return (ENXIO);
1286 if (type > NUMDENS)
1287 return (ENXIO);
1288 if (type == 0)
1289 type = fd->type;
1290 else {
1291 /*
1292 * For each type of basic drive, make sure we are trying
1293 * to open a type it can do,
1294 */
1295 if (type != fd->type) {
1296 switch (fd->type) {
1297 case FD_360:
1298 return (ENXIO);
1299 case FD_720:
1300 if ( type != FD_820
1301 && type != FD_800
1302 && type != FD_640
1303 )
1304 return (ENXIO);
1305 break;
1306 case FD_1200:
1307 switch (type) {
1308 case FD_1480:
1309 type = FD_1480in5_25;
1310 break;
1311 case FD_1440:
1312 type = FD_1440in5_25;
1313 break;
1314 case FD_1232:
1315 break;
1316 case FD_820:
1317 type = FD_820in5_25;
1318 break;
1319 case FD_800:
1320 type = FD_800in5_25;
1321 break;
1322 case FD_720:
1323 type = FD_720in5_25;
1324 break;
1325 case FD_640:
1326 type = FD_640in5_25;
1327 break;
1328 case FD_360:
1329 type = FD_360in5_25;
1330 break;
1331 default:
1332 return(ENXIO);
1333 }
1334 break;
1335 case FD_1440:
1336 if ( type != FD_1720
1337 && type != FD_1480
1338 && type != FD_1200
1339 && type != FD_820
1340 && type != FD_800
1341 && type != FD_720
1342 && type != FD_640
1343 )
1344 return(ENXIO);
1345 break;
1346 }
1347 }
1348 }
1349 fd->ft = fd_types + type - 1;
1350 fd->flags |= FD_OPEN;
1351 /*
1352 * Clearing the DMA overrun counter at open time is a bit messy.
1353 * Since we're only managing one counter per controller, opening
1354 * the second drive could mess it up. Anyway, if the DMA overrun
1355 * condition is really persistent, it will eventually time out
1356 * still. OTOH, clearing it here will ensure we'll at least start
1357 * trying again after a previous (maybe even long ago) failure.
1358 * Also, this is merely a stop-gap measure only that should not
1359 * happen during normal operation, so we can tolerate it to be a
1360 * bit sloppy about this.
1361 */
1362 fdc->dma_overruns = 0;
1363
1364 return 0;
1365}
1366
1367int
41c20dac 1368fdclose(dev_t dev, int flags, int mode, struct thread *td)
984263bc
MD
1369{
1370 fdu_t fdu = FDUNIT(minor(dev));
1371 struct fd_data *fd;
1372
1373 fd = devclass_get_softc(fd_devclass, fdu);
1374 fd->flags &= ~FD_OPEN;
1375 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1376
1377 return (0);
1378}
1379
1380/****************************************************************************/
1381/* fdstrategy */
1382/****************************************************************************/
1383void
81b5c339 1384fdstrategy(dev_t dev, struct bio *bio)
984263bc 1385{
81b5c339 1386 struct buf *bp = bio->bio_buf;
984263bc 1387 unsigned nblocks, blknum, cando;
984263bc
MD
1388 fdu_t fdu;
1389 fdc_p fdc;
1390 fd_p fd;
1391 size_t fdblk;
1392
81b5c339 1393 fdu = FDUNIT(minor(dev));
984263bc
MD
1394 fd = devclass_get_softc(fd_devclass, fdu);
1395 if (fd == 0)
1396 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
81b5c339 1397 (u_long)major(dev), (u_long)minor(dev));
984263bc
MD
1398 fdc = fd->fdc;
1399 if (fd->type == NO_TYPE) {
1400 bp->b_error = ENXIO;
1401 bp->b_flags |= B_ERROR;
1402 goto bad;
1403 };
1404
1405 fdblk = 128 << (fd->ft->secsize);
1406 if (!(bp->b_flags & B_FORMAT)) {
81b5c339 1407 if (bio->bio_blkno < 0) {
984263bc
MD
1408 printf(
1409 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
81b5c339 1410 fdu, (u_long)bio->bio_blkno, bp->b_bcount);
984263bc
MD
1411 bp->b_error = EINVAL;
1412 bp->b_flags |= B_ERROR;
1413 goto bad;
1414 }
1415 if ((bp->b_bcount % fdblk) != 0) {
1416 bp->b_error = EINVAL;
1417 bp->b_flags |= B_ERROR;
1418 goto bad;
1419 }
1420 }
1421
1422 /*
1423 * Set up block calculations.
1424 */
81b5c339 1425 if (bio->bio_blkno > 20000000) {
984263bc
MD
1426 /*
1427 * Reject unreasonably high block number, prevent the
1428 * multiplication below from overflowing.
1429 */
1430 bp->b_error = EINVAL;
1431 bp->b_flags |= B_ERROR;
1432 goto bad;
1433 }
81b5c339 1434 blknum = (unsigned) bio->bio_blkno * DEV_BSIZE/fdblk;
984263bc
MD
1435 nblocks = fd->ft->size;
1436 bp->b_resid = 0;
1437 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1438 if (blknum <= nblocks) {
1439 cando = (nblocks - blknum) * fdblk;
1440 bp->b_resid = bp->b_bcount - cando;
1441 if (cando == 0)
1442 goto bad; /* not actually bad but EOF */
1443 } else {
1444 bp->b_error = EINVAL;
1445 bp->b_flags |= B_ERROR;
1446 goto bad;
1447 }
1448 }
fbe276c7 1449 crit_enter();
81b5c339
MD
1450 bio->bio_driver_info = dev;
1451 bioqdisksort(&fdc->bio_queue, bio);
e8b273ff 1452 callout_stop(&fd->toffhandle);
984263bc
MD
1453
1454 /* Tell devstat we are starting on the transaction */
1455 devstat_start_transaction(&fd->device_stats);
1456 device_busy(fd->dev);
1457
1458 fdstart(fdc);
fbe276c7 1459 crit_exit();
984263bc
MD
1460 return;
1461
1462bad:
81b5c339 1463 biodone(bio);
984263bc
MD
1464}
1465
1466/***************************************************************\
1467* fdstart *
1468* We have just queued something.. if the controller is not busy *
1469* then simulate the case where it has just finished a command *
1470* So that it (the interrupt routine) looks on the queue for more*
1471* work to do and picks up what we just added. *
1472* If the controller is already busy, we need do nothing, as it *
1473* will pick up our work when the present work completes *
1474\***************************************************************/
1475static void
1476fdstart(struct fdc_data *fdc)
1477{
fbe276c7 1478 crit_enter();
984263bc
MD
1479 if(fdc->state == DEVIDLE)
1480 {
1481 fdc_intr(fdc);
1482 }
fbe276c7 1483 crit_exit();
984263bc
MD
1484}
1485
1486static void
1487fd_iotimeout(void *xfdc)
1488{
1489 fdc_p fdc;
984263bc
MD
1490
1491 fdc = xfdc;
1492 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1493
1494 /*
1495 * Due to IBM's brain-dead design, the FDC has a faked ready
1496 * signal, hardwired to ready == true. Thus, any command
1497 * issued if there's no diskette in the drive will _never_
1498 * complete, and must be aborted by resetting the FDC.
1499 * Many thanks, Big Blue!
1500 * The FDC must not be reset directly, since that would
1501 * interfere with the state machine. Instead, pretend that
1502 * the command completed but was invalid. The state machine
1503 * will reset the FDC and retry once.
1504 */
fbe276c7 1505 crit_enter();
984263bc
MD
1506 fdc->status[0] = NE7_ST0_IC_IV;
1507 fdc->flags &= ~FDC_STAT_VALID;
1508 fdc->state = IOTIMEDOUT;
1509 fdc_intr(fdc);
fbe276c7 1510 crit_exit();
984263bc
MD
1511}
1512
fbe276c7 1513/* just ensure it is running in a critical section */
984263bc
MD
1514static void
1515fd_pseudointr(void *xfdc)
1516{
fbe276c7 1517 crit_enter();
984263bc 1518 fdc_intr(xfdc);
fbe276c7 1519 crit_exit();
984263bc
MD
1520}
1521
1522/***********************************************************************\
1523* fdintr *
1524* keep calling the state machine until it returns a 0 *
1525* ALWAYS called at SPLBIO *
1526\***********************************************************************/
1527static void
1528fdc_intr(void *xfdc)
1529{
1530 fdc_p fdc = xfdc;
1531 while(fdstate(fdc))
1532 ;
1533}
1534
1535/*
1536 * magic pseudo-DMA initialization for YE FDC. Sets count and
1537 * direction
1538 */
1539#define SET_BCDR(fdc,wr,cnt,port) \
1540 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1541 ((cnt)-1) & 0xff); \
1542 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1543 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1544
1545/*
1546 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1547 */
1548static int fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count)
1549{
1550 u_char *cptr = (u_char *)addr;
1551
1552 if (flags & B_READ) {
1553 if (fdc->state != PIOREAD) {
1554 fdc->state = PIOREAD;
1555 return(0);
1556 };
1557 SET_BCDR(fdc, 0, count, 0);
1558 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1559 FDC_YE_DATAPORT, cptr, count);
1560 } else {
1561 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1562 FDC_YE_DATAPORT, cptr, count);
1563 SET_BCDR(fdc, 0, count, 0);
1564 };
1565 return(1);
1566}
1567
1568/***********************************************************************\
1569* The controller state machine. *
1570* if it returns a non zero value, it should be called again immediatly *
1571\***********************************************************************/
1572static int
1573fdstate(fdc_p fdc)
1574{
1575 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1576 unsigned blknum = 0, b_cylinder = 0;
1577 fdu_t fdu = fdc->fdu;
1578 fd_p fd;
81b5c339 1579 struct bio *bio;
3a1b0fdc 1580 struct buf *bp;
984263bc
MD
1581 struct fd_formb *finfo = NULL;
1582 size_t fdblk;
81b5c339
MD
1583 dev_t dev;
1584
1585 bio = fdc->bio;
1586 if (bio == NULL) {
1587 bio = bioq_first(&fdc->bio_queue);
1588 if (bio != NULL) {
1589 bioq_remove(&fdc->bio_queue, bio);
1590 fdc->bio = bio;
984263bc
MD
1591 }
1592 }
81b5c339 1593 if (bio == NULL) {
984263bc
MD
1594 /***********************************************\
1595 * nothing left for this controller to do *
1596 * Force into the IDLE state, *
1597 \***********************************************/
1598 fdc->state = DEVIDLE;
1599 if (fdc->fd) {
1600 device_printf(fdc->fdc_dev,
1601 "unexpected valid fd pointer\n");
1602 fdc->fd = (fd_p) 0;
1603 fdc->fdu = -1;
1604 }
1605 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1606 return (0);
1607 }
81b5c339
MD
1608 bp = bio->bio_buf;
1609 dev = bio->bio_driver_info;
1610
1611 fdu = FDUNIT(minor(dev));
984263bc
MD
1612 fd = devclass_get_softc(fd_devclass, fdu);
1613 fdblk = 128 << fd->ft->secsize;
1614 if (fdc->fd && (fd != fdc->fd))
1615 device_printf(fd->dev, "confused fd pointers\n");
1616 read = bp->b_flags & B_READ;
1617 format = bp->b_flags & B_FORMAT;
1618 if (format) {
1619 finfo = (struct fd_formb *)bp->b_data;
1620 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1621 - (char *)finfo;
1622 }
1623 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
81b5c339 1624 blknum = (unsigned) bio->bio_blkno * DEV_BSIZE/fdblk +
984263bc
MD
1625 fd->skip/fdblk;
1626 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1627 }
1628 TRACE1("fd%d", fdu);
1629 TRACE1("[%s]", fdstates[fdc->state]);
1630 TRACE1("(0x%x)", fd->flags);
e8b273ff 1631 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
984263bc
MD
1632 switch (fdc->state)
1633 {
1634 case DEVIDLE:
1635 case FINDWORK: /* we have found new work */
1636 fdc->retry = 0;
1637 fd->skip = 0;
1638 fdc->fd = fd;
1639 fdc->fdu = fdu;
1640 fdc->fdctl_wr(fdc, fd->ft->trans);
1641 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1642 /*******************************************************\
1643 * If the next drive has a motor startup pending, then *
1644 * it will start up in its own good time *
1645 \*******************************************************/
1646 if(fd->flags & FD_MOTOR_WAIT) {
1647 fdc->state = MOTORWAIT;
1648 return (0); /* come back later */
1649 }
1650 /*******************************************************\
1651 * Maybe if it's not starting, it SHOULD be starting *
1652 \*******************************************************/
1653 if (!(fd->flags & FD_MOTOR))
1654 {
1655 fdc->state = MOTORWAIT;
1656 fd_turnon(fd);
1657 return (0);
1658 }
1659 else /* at least make sure we are selected */
1660 {
1661 set_motor(fdc, fd->fdsu, TURNON);
1662 }
1663 if (fdc->flags & FDC_NEEDS_RESET) {
1664 fdc->state = RESETCTLR;
1665 fdc->flags &= ~FDC_NEEDS_RESET;
1666 } else
1667 fdc->state = DOSEEK;
1668 break;
1669 case DOSEEK:
1670 if (b_cylinder == (unsigned)fd->track)
1671 {
1672 fdc->state = SEEKCOMPLETE;
1673 break;
1674 }
1675 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1676 fd->fdsu, b_cylinder * fd->ft->steptrac,
1677 0))
1678 {
1679 /*
1680 * seek command not accepted, looks like
1681 * the FDC went off to the Saints...
1682 */
1683 fdc->retry = 6; /* try a reset */
1684 return(retrier(fdc));
1685 }
1686 fd->track = FD_NO_TRACK;
1687 fdc->state = SEEKWAIT;
1688 return(0); /* will return later */
1689 case SEEKWAIT:
1690 /* allow heads to settle */
4fc46503
JS
1691 callout_reset(&fdc->pseudointr_ch, hz / 16,
1692 fd_pseudointr, fdc);
984263bc
MD
1693 fdc->state = SEEKCOMPLETE;
1694 return(0); /* will return later */
1695 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1696 /* Make sure seek really happened*/
1697 if(fd->track == FD_NO_TRACK) {
1698 int descyl = b_cylinder * fd->ft->steptrac;
1699 do {
1700 /*
1701 * This might be a "ready changed" interrupt,
1702 * which cannot really happen since the
1703 * RDY pin is hardwired to + 5 volts. This
1704 * generally indicates a "bouncing" intr
1705 * line, so do one of the following:
1706 *
1707 * When running on an enhanced FDC that is
1708 * known to not go stuck after responding
1709 * with INVALID, fetch all interrupt states
1710 * until seeing either an INVALID or a
1711 * real interrupt condition.
1712 *
1713 * When running on a dumb old NE765, give
1714 * up immediately. The controller will
1715 * provide up to four dummy RC interrupt
1716 * conditions right after reset (for the
1717 * corresponding four drives), so this is
1718 * our only chance to get notice that it
1719 * was not the FDC that caused the interrupt.
1720 */
1721 if (fd_sense_int(fdc, &st0, &cyl)
1722 == FD_NOT_VALID)
1723 return 0;
1724 if(fdc->fdct == FDC_NE765
1725 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1726 return 0; /* hope for a real intr */
1727 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1728
1729 if (0 == descyl) {
1730 int failed = 0;
1731 /*
1732 * seek to cyl 0 requested; make sure we are
1733 * really there
1734 */
1735 if (fd_sense_drive_status(fdc, &st3))
1736 failed = 1;
1737 if ((st3 & NE7_ST3_T0) == 0) {
1738 printf(
1739 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1740 fdu, st3, NE7_ST3BITS);
1741 failed = 1;
1742 }
1743
1744 if (failed) {
1745 if(fdc->retry < 3)
1746 fdc->retry = 3;
1747 return (retrier(fdc));
1748 }
1749 }
1750
1751 if (cyl != descyl) {
1752 printf(
1753 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1754 fdu, descyl, cyl, st0);
1755 if (fdc->retry < 3)
1756 fdc->retry = 3;
1757 return (retrier(fdc));
1758 }
1759 }
1760
1761 fd->track = b_cylinder;
1762 if (!(fdc->flags & FDC_NODMA))
1763 isa_dmastart(bp->b_flags, bp->b_data+fd->skip,
1764 format ? bp->b_bcount : fdblk, fdc->dmachan);
1765 sectrac = fd->ft->sectrac;
1766 sec = blknum % (sectrac * fd->ft->heads);
1767 head = sec / sectrac;
1768 sec = sec % sectrac + 1;
1769 fd->hddrv = ((head&1)<<2)+fdu;
1770
1771 if(format || !read)
1772 {
1773 /* make sure the drive is writable */
1774 if(fd_sense_drive_status(fdc, &st3) != 0)
1775 {
1776 /* stuck controller? */
1777 if (!(fdc->flags & FDC_NODMA))
1778 isa_dmadone(bp->b_flags,
1779 bp->b_data + fd->skip,
1780 format ? bp->b_bcount : fdblk,
1781 fdc->dmachan);
1782 fdc->retry = 6; /* reset the beast */
1783 return (retrier(fdc));
1784 }
1785 if(st3 & NE7_ST3_WP)
1786 {
1787 /*
1788 * XXX YES! this is ugly.
1789 * in order to force the current operation
1790 * to fail, we will have to fake an FDC
1791 * error - all error handling is done
1792 * by the retrier()
1793 */
1794 fdc->status[0] = NE7_ST0_IC_AT;
1795 fdc->status[1] = NE7_ST1_NW;
1796 fdc->status[2] = 0;
1797 fdc->status[3] = fd->track;
1798 fdc->status[4] = head;
1799 fdc->status[5] = sec;
1800 fdc->retry = 8; /* break out immediately */
1801 fdc->state = IOTIMEDOUT; /* not really... */
1802 return (1);
1803 }
1804 }
1805
1806 if (format) {
1807 if (fdc->flags & FDC_NODMA) {
1808 /*
1809 * This seems to be necessary for
1810 * whatever obscure reason; if we omit
1811 * it, we end up filling the sector ID
1812 * fields of the newly formatted track
1813 * entirely with garbage, causing
1814 * `wrong cylinder' errors all over
1815 * the place when trying to read them
1816 * back.
1817 *
1818 * Umpf.
1819 */
1820 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1821
1822 (void)fdcpio(fdc,bp->b_flags,
1823 bp->b_data+fd->skip,
1824 bp->b_bcount);
1825
1826 }
1827 /* formatting */
1828 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1829 finfo->fd_formb_secshift,
1830 finfo->fd_formb_nsecs,
1831 finfo->fd_formb_gaplen,
1832 finfo->fd_formb_fillbyte, 0)) {
1833 /* controller fell over */
1834 if (!(fdc->flags & FDC_NODMA))
1835 isa_dmadone(bp->b_flags,
1836 bp->b_data + fd->skip,
1837 format ? bp->b_bcount : fdblk,
1838 fdc->dmachan);
1839 fdc->retry = 6;
1840 return (retrier(fdc));
1841 }
1842 } else {
1843 if (fdc->flags & FDC_NODMA) {
1844 /*
1845 * this seems to be necessary even when
1846 * reading data
1847 */
1848 SET_BCDR(fdc, 1, fdblk, 0);
1849
1850 /*
1851 * perform the write pseudo-DMA before
1852 * the WRITE command is sent
1853 */
1854 if (!read)
1855 (void)fdcpio(fdc,bp->b_flags,
1856 bp->b_data+fd->skip,
1857 fdblk);
1858 }
1859 if (fd_cmd(fdc, 9,
1860 (read ? NE7CMD_READ : NE7CMD_WRITE),
1861 head << 2 | fdu, /* head & unit */
1862 fd->track, /* track */
1863 head,
1864 sec, /* sector + 1 */
1865 fd->ft->secsize, /* sector size */
1866 sectrac, /* sectors/track */
1867 fd->ft->gap, /* gap size */
1868 fd->ft->datalen, /* data length */
1869 0)) {
1870 /* the beast is sleeping again */
1871 if (!(fdc->flags & FDC_NODMA))
1872 isa_dmadone(bp->b_flags,
1873 bp->b_data + fd->skip,
1874 format ? bp->b_bcount : fdblk,
1875 fdc->dmachan);
1876 fdc->retry = 6;
1877 return (retrier(fdc));
1878 }
1879 }
1880 if (fdc->flags & FDC_NODMA)
1881 /*
1882 * if this is a read, then simply await interrupt
1883 * before performing PIO
1884 */
1885 if (read && !fdcpio(fdc,bp->b_flags,
1886 bp->b_data+fd->skip,fdblk)) {
e8b273ff
MD
1887 callout_reset(&fd->tohandle, hz,
1888 fd_iotimeout, fdc);
984263bc
MD
1889 return(0); /* will return later */
1890 };
1891
1892 /*
1893 * write (or format) operation will fall through and
1894 * await completion interrupt
1895 */
1896 fdc->state = IOCOMPLETE;
e8b273ff 1897 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
984263bc
MD
1898 return (0); /* will return later */
1899 case PIOREAD:
1900 /*
1901 * actually perform the PIO read. The IOCOMPLETE case
1902 * removes the timeout for us.
1903 */
1904 (void)fdcpio(fdc,bp->b_flags,bp->b_data+fd->skip,fdblk);
1905 fdc->state = IOCOMPLETE;
1906 /* FALLTHROUGH */
1907 case IOCOMPLETE: /* IO DONE, post-analyze */
e8b273ff 1908 callout_stop(&fd->tohandle);
984263bc
MD
1909
1910 if (fd_read_status(fdc, fd->fdsu)) {
1911 if (!(fdc->flags & FDC_NODMA))
1912 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1913 format ? bp->b_bcount : fdblk,
1914 fdc->dmachan);
1915 if (fdc->retry < 6)
1916 fdc->retry = 6; /* force a reset */
1917 return (retrier(fdc));
1918 }
1919
1920 fdc->state = IOTIMEDOUT;
1921
1922 /* FALLTHROUGH */
1923
1924 case IOTIMEDOUT:
1925 if (!(fdc->flags & FDC_NODMA))
1926 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1927 format ? bp->b_bcount : fdblk, fdc->dmachan);
1928 if (fdc->status[0] & NE7_ST0_IC) {
1929 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1930 && fdc->status[1] & NE7_ST1_OR) {
1931 /*
1932 * DMA overrun. Someone hogged the bus and
1933 * didn't release it in time for the next
1934 * FDC transfer.
1935 *
1936 * We normally restart this without bumping
1937 * the retry counter. However, in case
1938 * something is seriously messed up (like
1939 * broken hardware), we rather limit the
1940 * number of retries so the IO operation
1941 * doesn't block indefinately.
1942 */
1943 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
1944 fdc->state = SEEKCOMPLETE;
1945 return (1);
1946 } /* else fall through */
1947 }
1948 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
1949 && fdc->retry < 6)
1950 fdc->retry = 6; /* force a reset */
1951 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1952 && fdc->status[2] & NE7_ST2_WC
1953 && fdc->retry < 3)
1954 fdc->retry = 3; /* force recalibrate */
1955 return (retrier(fdc));
1956 }
1957 /* All OK */
1958 /* Operation successful, retry DMA overruns again next time. */
1959 fdc->dma_overruns = 0;
1960 fd->skip += fdblk;
1961 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
1962 /* set up next transfer */
1963 fdc->state = DOSEEK;
1964 } else {
1965 /* ALL DONE */
1966 fd->skip = 0;
81b5c339 1967 fdc->bio = NULL;
984263bc
MD
1968 device_unbusy(fd->dev);
1969 devstat_end_transaction_buf(&fd->device_stats, bp);
81b5c339 1970 biodone(bio);
984263bc
MD
1971 fdc->fd = (fd_p) 0;
1972 fdc->fdu = -1;
1973 fdc->state = FINDWORK;
1974 }
1975 return (1);
1976 case RESETCTLR:
1977 fdc_reset(fdc);
1978 fdc->retry++;
1979 fdc->state = RESETCOMPLETE;
1980 return (0);
1981 case RESETCOMPLETE:
1982 /*
1983 * Discard all the results from the reset so that they
1984 * can't cause an unexpected interrupt later.
1985 */
1986 for (i = 0; i < 4; i++)
1987 (void)fd_sense_int(fdc, &st0, &cyl);
1988 fdc->state = STARTRECAL;
1989 /* Fall through. */
1990 case STARTRECAL:
1991 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
1992 /* arrgl */
1993 fdc->retry = 6;
1994 return (retrier(fdc));
1995 }
1996 fdc->state = RECALWAIT;
1997 return (0); /* will return later */
1998 case RECALWAIT:
1999 /* allow heads to settle */
4fc46503 2000 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
984263bc
MD
2001 fdc->state = RECALCOMPLETE;
2002 return (0); /* will return later */
2003 case RECALCOMPLETE:
2004 do {
2005 /*
2006 * See SEEKCOMPLETE for a comment on this:
2007 */
2008 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2009 return 0;
2010 if(fdc->fdct == FDC_NE765
2011 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2012 return 0; /* hope for a real intr */
2013 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2014 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2015 {
2016 if(fdc->retry > 3)
2017 /*
2018 * a recalibrate from beyond cylinder 77
2019 * will "fail" due to the FDC limitations;
2020 * since people used to complain much about
2021 * the failure message, try not logging
2022 * this one if it seems to be the first
2023 * time in a line
2024 */
2025 printf("fd%d: recal failed ST0 %b cyl %d\n",
2026 fdu, st0, NE7_ST0BITS, cyl);
2027 if(fdc->retry < 3) fdc->retry = 3;
2028 return (retrier(fdc));
2029 }
2030 fd->track = 0;
2031 /* Seek (probably) necessary */
2032 fdc->state = DOSEEK;
2033 return (1); /* will return immediatly */
2034 case MOTORWAIT:
2035 if(fd->flags & FD_MOTOR_WAIT)
2036 {
2037 return (0); /* time's not up yet */
2038 }
2039 if (fdc->flags & FDC_NEEDS_RESET) {
2040 fdc->state = RESETCTLR;
2041 fdc->flags &= ~FDC_NEEDS_RESET;
2042 } else {
2043 /*
2044 * If all motors were off, then the controller was
2045 * reset, so it has lost track of the current
2046 * cylinder. Recalibrate to handle this case.
2047 * But first, discard the results of the reset.
2048 */
2049 fdc->state = RESETCOMPLETE;
2050 }
2051 return (1); /* will return immediatly */
2052 default:
2053 device_printf(fdc->fdc_dev, "unexpected FD int->");
2054 if (fd_read_status(fdc, fd->fdsu) == 0)
2055 printf("FDC status :%x %x %x %x %x %x %x ",
2056 fdc->status[0],
2057 fdc->status[1],
2058 fdc->status[2],
2059 fdc->status[3],
2060 fdc->status[4],
2061 fdc->status[5],
2062 fdc->status[6] );
2063 else
2064 printf("No status available ");
2065 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2066 {
2067 printf("[controller is dead now]\n");
2068 return (0);
2069 }
2070 printf("ST0 = %x, PCN = %x\n", st0, cyl);
2071 return (0);
2072 }
2073 /*XXX confusing: some branches return immediately, others end up here*/
2074 return (1); /* Come back immediatly to new state */
2075}
2076
2077static int
2078retrier(struct fdc_data *fdc)
2079{
81b5c339 2080 struct bio *bio;
3a1b0fdc 2081 struct buf *bp;
984263bc 2082 struct fd_data *fd;
81b5c339 2083 dev_t dev;
984263bc
MD
2084 int fdu;
2085
81b5c339
MD
2086 bio = fdc->bio;
2087 bp = bio->bio_buf;
2088 dev = bio->bio_driver_info;
984263bc
MD
2089
2090 /* XXX shouldn't this be cached somewhere? */
81b5c339 2091 fdu = FDUNIT(minor(dev));
984263bc
MD
2092 fd = devclass_get_softc(fd_devclass, fdu);
2093 if (fd->options & FDOPT_NORETRY)
2094 goto fail;
2095
2096 switch (fdc->retry) {
2097 case 0: case 1: case 2:
2098 fdc->state = SEEKCOMPLETE;
2099 break;
2100 case 3: case 4: case 5:
2101 fdc->state = STARTRECAL;
2102 break;
2103 case 6:
2104 fdc->state = RESETCTLR;
2105 break;
2106 case 7:
2107 break;
2108 default:
2109 fail:
2110 {
2111 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
984263bc 2112
e4c9c0c8 2113 if (printerror) {
ee3ad2c9
MD
2114 /*
2115 * note: use the correct device for more
2116 * verbose error reporting.
2117 */
2118 dev_t subdev;
2119
81b5c339
MD
2120 subdev = make_sub_dev(dev,
2121 (FDUNIT(minor(dev))<<3)|RAW_PART);
2122 diskerr(bio, subdev,
ee3ad2c9 2123 "hard error", LOG_PRINTF,
984263bc
MD
2124 fdc->fd->skip / DEV_BSIZE,
2125 (struct disklabel *)NULL);
e4c9c0c8 2126 }
984263bc
MD
2127 if (printerror) {
2128 if (fdc->flags & FDC_STAT_VALID)
2129 printf(
2130 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2131 fdc->status[0], NE7_ST0BITS,
2132 fdc->status[1], NE7_ST1BITS,
2133 fdc->status[2], NE7_ST2BITS,
2134 fdc->status[3], fdc->status[4],
2135 fdc->status[5]);
2136 else
2137 printf(" (No status)\n");
2138 }
2139 }
2140 bp->b_flags |= B_ERROR;
2141 bp->b_error = EIO;
2142 bp->b_resid += bp->b_bcount - fdc->fd->skip;
81b5c339 2143 fdc->bio = NULL;
984263bc
MD
2144 fdc->fd->skip = 0;
2145 device_unbusy(fd->dev);
2146 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
81b5c339 2147 biodone(bio);
984263bc
MD
2148 fdc->state = FINDWORK;
2149 fdc->flags |= FDC_NEEDS_RESET;
2150 fdc->fd = (fd_p) 0;
2151 fdc->fdu = -1;
2152 return (1);
2153 }
2154 fdc->retry++;
2155 return (1);
2156}
2157
2158static int
41c20dac 2159fdformat(dev_t dev, struct fd_formb *finfo, struct thread *td)
984263bc
MD
2160{
2161 fdu_t fdu;
2162 fd_p fd;
2163
2164 struct buf *bp;
fbe276c7 2165 int rv = 0;
984263bc
MD
2166 size_t fdblk;
2167
2168 fdu = FDUNIT(minor(dev));
2169 fd = devclass_get_softc(fd_devclass, fdu);
2170 fdblk = 128 << fd->ft->secsize;
2171
2172 /* set up a buffer header for fdstrategy() */
3aed1355
MD
2173 bp = malloc(sizeof(struct buf), M_TEMP, M_WAITOK | M_ZERO);
2174
984263bc
MD
2175 BUF_LOCKINIT(bp);
2176 BUF_LOCK(bp, LK_EXCLUSIVE);
81b5c339 2177 initbufbio(bp);
984263bc
MD
2178 bp->b_flags = B_PHYS | B_FORMAT;
2179
2180 /*
2181 * calculate a fake blkno, so fdstrategy() would initiate a
2182 * seek to the requested cylinder
2183 */
81b5c339 2184 bp->b_bio1.bio_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
984263bc 2185 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
81b5c339 2186 bp->b_bio1.bio_driver_info = dev;
984263bc
MD
2187
2188 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2189 bp->b_data = (caddr_t)finfo;
2190
2191 /* now do the format */
81b5c339 2192 dev_dstrategy(dev, &bp->b_bio1);
984263bc
MD
2193
2194 /* ...and wait for it to complete */
fbe276c7 2195 crit_enter();
984263bc 2196 while(!(bp->b_flags & B_DONE)) {
377d4740 2197 rv = tsleep((caddr_t)bp, 0, "fdform", 20 * hz);
984263bc
MD
2198 if (rv == EWOULDBLOCK)
2199 break;
2200 }
fbe276c7 2201 crit_exit();
984263bc
MD
2202
2203 if (rv == EWOULDBLOCK) {
2204 /* timed out */
2205 rv = EIO;
2206 device_unbusy(fd->dev);
81b5c339 2207 biodone(&bp->b_bio1);
984263bc
MD
2208 }
2209 if (bp->b_flags & B_ERROR)
2210 rv = bp->b_error;
2211 /*
2212 * allow the process to be swapped
2213 */
984263bc
MD
2214 BUF_UNLOCK(bp);
2215 BUF_LOCKFREE(bp);
2216 free(bp, M_TEMP);
2217 return rv;
2218}
2219
2220/*
2221 * TODO: don't allocate buffer on stack.
2222 */
2223
2224static int
41c20dac 2225fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
984263bc
MD
2226{
2227 fdu_t fdu = FDUNIT(minor(dev));
2228 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2229 size_t fdblk;
2230
2231 struct fd_type *fdt;
2232 struct disklabel *dl;
2233 struct fdc_status *fsp;
2234 char buffer[DEV_BSIZE];
2235 int error = 0;
2236
2237 fdblk = 128 << fd->ft->secsize;
2238
2239 switch (cmd) {
2240 case DIOCGDINFO:
2241 bzero(buffer, sizeof (buffer));
2242 dl = (struct disklabel *)buffer;
2243 dl->d_secsize = fdblk;
2244 fdt = fd->ft;
2245 dl->d_secpercyl = fdt->size / fdt->tracks;
2246 dl->d_type = DTYPE_FLOPPY;
2247
2248 if (readdisklabel(dev, dl)
2249 == NULL)
2250 error = 0;
2251 else
2252 error = EINVAL;
2253
2254 *(struct disklabel *)addr = *dl;
2255 break;
2256
2257 case DIOCSDINFO:
2258 if ((flag & FWRITE) == 0)
2259 error = EBADF;
2260 break;
2261
2262 case DIOCWLABEL:
2263 if ((flag & FWRITE) == 0)
2264 error = EBADF;
2265 break;
2266
2267 case DIOCWDINFO:
2268 if ((flag & FWRITE) == 0) {
2269 error = EBADF;
2270 break;
2271 }
2272
2273 dl = (struct disklabel *)addr;
2274
2275 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2276 (u_long)0)) != 0)
2277 break;
2278
2279 error = writedisklabel(dev, (struct disklabel *)buffer);
2280 break;
2281 case FD_FORM:
2282 if ((flag & FWRITE) == 0)
2283 error = EBADF; /* must be opened for writing */
2284 else if (((struct fd_formb *)addr)->format_version !=
2285 FD_FORMAT_VERSION)
2286 error = EINVAL; /* wrong version of formatting prog */
2287 else
41c20dac 2288 error = fdformat(dev, (struct fd_formb *)addr, td);
984263bc
MD
2289 break;
2290
2291 case FD_GTYPE: /* get drive type */
2292 *(struct fd_type *)addr = *fd->ft;
2293 break;
2294
2295 case FD_STYPE: /* set drive type */
2296 /* this is considered harmful; only allow for superuser */
dadab5e9 2297 if (suser(td) != 0)
984263bc
MD
2298 return EPERM;
2299 *fd->ft = *(struct fd_type *)addr;
2300 break;
2301
2302 case FD_GOPTS: /* get drive options */
2303 *(int *)addr = fd->options;
2304 break;
2305
2306 case FD_SOPTS: /* set drive options */
2307 fd->options = *(int *)addr;
2308 break;
2309
2310 case FD_GSTAT:
2311 fsp = (struct fdc_status *)addr;
2312 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2313 return EINVAL;
2314 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2315 break;
2316
2317 default:
2318 error = ENOTTY;
2319 break;
2320 }
2321 return (error);
2322}
2323
2324/*
2325 * Hello emacs, these are the
2326 * Local Variables:
2327 * c-indent-level: 8
2328 * c-continued-statement-offset: 8
2329 * c-continued-brace-offset: 0
2330 * c-brace-offset: -8
2331 * c-brace-imaginary-offset: 0
2332 * c-argdecl-indent: 8
2333 * c-label-offset: -8
2334 * c++-hanging-braces: 1
2335 * c++-access-specifier-offset: -8
2336 * c++-empty-arglist-indent: 8
2337 * c++-friend-offset: 0
2338 * End:
2339 */