Initial backport of NEWCARD from FreeBSD 5.
[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 $
666d2603 54 * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.13 2004/02/10 07:55:46 joerg 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 */
201 struct callout_handle toffhandle;
202 struct callout_handle tohandle;
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,
338 /* autoq */ 0,
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;
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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
984263bc
MD
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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MD
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
984263bc
MD
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
771 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT);
772 if (ivar == NULL)
773 return;
774 bzero(ivar, sizeof *ivar);
775 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
776 ivar->fdunit = 0;
777 child = device_add_child(dev, name, unit);
778 if (child == NULL)
779 return;
780 device_set_ivars(child, ivar);
781 if (resource_int_value(name, unit, "disabled", &disabled) == 0
782 && disabled != 0)
783 device_disable(child);
784}
785
8c5c0470 786int
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MD
787fdc_attach(device_t dev)
788{
789 struct fdc_data *fdc;
790 int i, error;
791
792 fdc = device_get_softc(dev);
793 error = fdc_alloc_resources(fdc);
794 if (error) {
795 device_printf(dev, "cannot re-aquire resources\n");
796 return error;
797 }
798 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
799 INTR_TYPE_BIO, fdc_intr, fdc, &fdc->fdc_intr);
800 if (error) {
801 device_printf(dev, "cannot setup interrupt\n");
802 return error;
803 }
804 fdc->fdcu = device_get_unit(dev);
805 fdc->flags |= FDC_ATTACHED;
806
807 if ((fdc->flags & FDC_NODMA) == 0) {
808 /* Acquire the DMA channel forever, The driver will do the rest */
809 /* XXX should integrate with rman */
810 isa_dma_acquire(fdc->dmachan);
811 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
812 }
813 fdc->state = DEVIDLE;
814
815 /* reset controller, turn motor off, clear fdout mirror reg */
816 fdout_wr(fdc, ((fdc->fdout = 0)));
817 bufq_init(&fdc->head);
818
819 /*
820 * Probe and attach any children. We should probably detect
821 * devices from the BIOS unless overridden.
822 */
823 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
824 i != -1;
825 i = resource_query_string(i, "at", device_get_nameunit(dev)))
826 fdc_add_child(dev, resource_query_name(i),
827 resource_query_unit(i));
828
829 return (bus_generic_attach(dev));
830}
831
8c5c0470 832int
984263bc
MD
833fdc_print_child(device_t me, device_t child)
834{
835 int retval = 0;
836
837 retval += bus_print_child_header(me, child);
838 retval += printf(" on %s drive %d\n", device_get_nameunit(me),
839 fdc_get_fdunit(child));
840
841 return (retval);
842}
843
844static device_method_t fdc_methods[] = {
845 /* Device interface */
846 DEVMETHOD(device_probe, fdc_probe),
847 DEVMETHOD(device_attach, fdc_attach),
848 DEVMETHOD(device_detach, bus_generic_detach),
849 DEVMETHOD(device_shutdown, bus_generic_shutdown),
850 DEVMETHOD(device_suspend, bus_generic_suspend),
851 DEVMETHOD(device_resume, bus_generic_resume),
852
853 /* Bus interface */
854 DEVMETHOD(bus_print_child, fdc_print_child),
855 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
856 /* Our children never use any other bus interface methods. */
857
858 { 0, 0 }
859};
860
861static driver_t fdc_driver = {
862 "fdc",
863 fdc_methods,
864 sizeof(struct fdc_data)
865};
866
867DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
868
984263bc
MD
869/******************************************************************/
870/*
871 * devices attached to the controller section.
872 */
873static int
874fd_probe(device_t dev)
875{
876 int i;
877 u_int fdt, st0, st3;
878 struct fd_data *fd;
879 struct fdc_data *fdc;
880 fdsu_t fdsu;
881 static int fd_fifo = 0;
882
883 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
884 fd = device_get_softc(dev);
885 fdc = device_get_softc(device_get_parent(dev));
886
887 bzero(fd, sizeof *fd);
888 fd->dev = dev;
889 fd->fdc = fdc;
890 fd->fdsu = fdsu;
891 fd->fdu = device_get_unit(dev);
892
893#ifdef __i386__
894 /* look up what bios thinks we have */
895 switch (fd->fdu) {
896 case 0:
897 if ((fdc->flags & FDC_ISPCMCIA))
898 fdt = RTCFDT_144M;
899 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
900 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
901 else
902 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
903 break;
904 case 1:
905 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
906 break;
907 default:
908 fdt = RTCFDT_NONE;
909 break;
910 }
911#else
912 fdt = RTCFDT_144M; /* XXX probably */
913#endif
914
915 /* is there a unit? */
916 if (fdt == RTCFDT_NONE)
917 return (ENXIO);
918
919 /* select it */
920 set_motor(fdc, fdsu, TURNON);
921 DELAY(1000000); /* 1 sec */
922
923 /* XXX This doesn't work before the first set_motor() */
924 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
925 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
926 && enable_fifo(fdc) == 0) {
927 device_printf(device_get_parent(dev),
928 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
929 }
930 fd_fifo = 1;
931
932 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
933 && (st3 & NE7_ST3_T0)) {
934 /* if at track 0, first seek inwards */
935 /* seek some steps: */
936 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
937 DELAY(300000); /* ...wait a moment... */
938 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
939 }
940
941 /* If we're at track 0 first seek inwards. */
942 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
943 /* Seek some steps... */
944 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
945 /* ...wait a moment... */
946 DELAY(300000);
947 /* make ctrlr happy: */
948 fd_sense_int(fdc, 0, 0);
949 }
950 }
951
952 for (i = 0; i < 2; i++) {
953 /*
954 * we must recalibrate twice, just in case the
955 * heads have been beyond cylinder 76, since most
956 * FDCs still barf when attempting to recalibrate
957 * more than 77 steps
958 */
959 /* go back to 0: */
960 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
961 /* a second being enough for full stroke seek*/
962 DELAY(i == 0 ? 1000000 : 300000);
963
964 /* anything responding? */
965 if (fd_sense_int(fdc, &st0, 0) == 0 &&
966 (st0 & NE7_ST0_EC) == 0)
967 break; /* already probed succesfully */
968 }
969 }
970
971 set_motor(fdc, fdsu, TURNOFF);
972
973 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
974 return (ENXIO);
975
976 fd->track = FD_NO_TRACK;
977 fd->fdc = fdc;
978 fd->fdsu = fdsu;
979 fd->options = 0;
980 callout_handle_init(&fd->toffhandle);
981 callout_handle_init(&fd->tohandle);
982
983 switch (fdt) {
984 case RTCFDT_12M:
985 device_set_desc(dev, "1200-KB 5.25\" drive");
986 fd->type = FD_1200;
987 break;
988 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
989 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
990 fdt = RTCFDT_144M;
991 fd->type = FD_1440;
992 case RTCFDT_144M:
993 device_set_desc(dev, "1440-KB 3.5\" drive");
994 fd->type = FD_1440;
995 break;
996 case RTCFDT_288M:
997 case RTCFDT_288M_1:
998 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
999 fd->type = FD_1440;
1000 break;
1001 case RTCFDT_360K:
1002 device_set_desc(dev, "360-KB 5.25\" drive");
1003 fd->type = FD_360;
1004 break;
1005 case RTCFDT_720K:
1006 printf("720-KB 3.5\" drive");
1007 fd->type = FD_720;
1008 break;
1009 default:
1010 return (ENXIO);
1011 }
1012 return (0);
1013}
1014
1015static int
1016fd_attach(device_t dev)
1017{
1018 struct fd_data *fd;
1019#if 0
1020 int i;
1021 int mynor;
1022 int typemynor;
1023 int typesize;
1024#endif
1025 static int cdevsw_add_done = 0;
1026
1027 fd = device_get_softc(dev);
1028
1029 if (!cdevsw_add_done) {
1030 cdevsw_add(&fd_cdevsw); /* XXX */
1031 cdevsw_add_done++;
1032 }
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);
1056 untimeout(fd_turnoff, fd, fd->toffhandle);
1057
1058 return (0);
1059}
1060
1061static device_method_t fd_methods[] = {
1062 /* Device interface */
1063 DEVMETHOD(device_probe, fd_probe),
1064 DEVMETHOD(device_attach, fd_attach),
1065 DEVMETHOD(device_detach, fd_detach),
1066 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1067 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1068 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1069
1070 { 0, 0 }
1071};
1072
1073static driver_t fd_driver = {
1074 "fd",
1075 fd_methods,
1076 sizeof(struct fd_data)
1077};
1078
1079DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1080
1081/****************************************************************************/
1082/* motor control stuff */
1083/* remember to not deselect the drive we're working on */
1084/****************************************************************************/
1085static void
1086set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1087{
1088 int fdout = fdc->fdout;
1089 int needspecify = 0;
1090
1091 if(turnon) {
1092 fdout &= ~FDO_FDSEL;
1093 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1094 } else
1095 fdout &= ~(FDO_MOEN0 << fdsu);
1096
1097 if(!turnon
1098 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1099 /* gonna turn off the last drive, put FDC to bed */
1100 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1101 else {
1102 /* make sure controller is selected and specified */
1103 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1104 needspecify = 1;
1105 fdout |= (FDO_FRST|FDO_FDMAEN);
1106 }
1107
1108 fdout_wr(fdc, fdout);
1109 fdc->fdout = fdout;
1110 TRACE1("[0x%x->FDOUT]", fdout);
1111
1112 if (needspecify) {
1113 /*
1114 * XXX
1115 * special case: since we have just woken up the FDC
1116 * from its sleep, we silently assume the command will
1117 * be accepted, and do not test for a timeout
1118 */
1119 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1120 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1121 0);
1122 if (fdc->flags & FDC_HAS_FIFO)
1123 (void) enable_fifo(fdc);
1124 }
1125}
1126
1127static void
1128fd_turnoff(void *xfd)
1129{
1130 int s;
1131 fd_p fd = xfd;
1132
1133 TRACE1("[fd%d: turnoff]", fd->fdu);
1134
1135 s = splbio();
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);
1146 splx(s);
1147 return;
1148 }
1149
1150 fd->flags &= ~FD_MOTOR;
1151 set_motor(fd->fdc, fd->fdsu, TURNOFF);
1152 splx(s);
1153}
1154
1155static void
1156fd_motor_on(void *xfd)
1157{
1158 int s;
1159 fd_p fd = xfd;
1160
1161 s = splbio();
1162 fd->flags &= ~FD_MOTOR_WAIT;
1163 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1164 {
1165 fdc_intr(fd->fdc);
1166 }
1167 splx(s);
1168}
1169
1170static void
1171fd_turnon(fd_p fd)
1172{
1173 if(!(fd->flags & FD_MOTOR))
1174 {
1175 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1176 set_motor(fd->fdc, fd->fdsu, TURNON);
1177 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */
1178 }
1179}
1180
1181static void
1182fdc_reset(fdc_p fdc)
1183{
1184 /* Try a reset, keep motor on */
1185 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1186 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1187 DELAY(100);
1188 /* enable FDC, but defer interrupts a moment */
1189 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1190 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1191 DELAY(100);
1192 fdout_wr(fdc, fdc->fdout);
1193 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1194
1195 /* XXX after a reset, silently believe the FDC will accept commands */
1196 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1197 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1198 0);
1199 if (fdc->flags & FDC_HAS_FIFO)
1200 (void) enable_fifo(fdc);
1201}
1202
1203/****************************************************************************/
1204/* fdc in/out */
1205/****************************************************************************/
1206/*
1207 * FDC IO functions, take care of the main status register, timeout
1208 * in case the desired status bits are never set.
1209 *
1210 * These PIO loops initially start out with short delays between
1211 * each iteration in the expectation that the required condition
1212 * is usually met quickly, so it can be handled immediately. After
1213 * about 1 ms, stepping is increased to achieve a better timing
1214 * accuracy in the calls to DELAY().
1215 */
1216static int
1217fd_in(struct fdc_data *fdc, int *ptr)
1218{
1219 int i, j, step;
1220
1221 for (j = 0, step = 1;
1222 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1223 j < FDSTS_TIMEOUT;
1224 j += step) {
1225 if (i == NE7_RQM)
1226 return (fdc_err(fdc, "ready for output in input\n"));
1227 if (j == 1000)
1228 step = 1000;
1229 DELAY(step);
1230 }
1231 if (j >= FDSTS_TIMEOUT)
1232 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1233#ifdef FDC_DEBUG
1234 i = fddata_rd(fdc);
1235 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1236 *ptr = i;
1237 return (0);
1238#else /* !FDC_DEBUG */
1239 i = fddata_rd(fdc);
1240 if (ptr)
1241 *ptr = i;
1242 return (0);
1243#endif /* FDC_DEBUG */
1244}
1245
1246static int
1247out_fdc(struct fdc_data *fdc, int x)
1248{
1249 int i, j, step;
1250
1251 for (j = 0, step = 1;
1252 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1253 j < FDSTS_TIMEOUT;
1254 j += step) {
1255 if (i == (NE7_DIO|NE7_RQM))
1256 return (fdc_err(fdc, "ready for input in output\n"));
1257 if (j == 1000)
1258 step = 1000;
1259 DELAY(step);
1260 }
1261 if (j >= FDSTS_TIMEOUT)
1262 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1263
1264 /* Send the command and return */
1265 fddata_wr(fdc, x);
1266 TRACE1("[0x%x->FDDATA]", x);
1267 return (0);
1268}
1269
1270/****************************************************************************/
1271/* fdopen/fdclose */
1272/****************************************************************************/
1273int
41c20dac 1274Fdopen(dev_t dev, int flags, int mode, struct thread *td)
984263bc
MD
1275{
1276 fdu_t fdu = FDUNIT(minor(dev));
1277 int type = FDTYPE(minor(dev));
1278 fd_p fd;
1279 fdc_p fdc;
1280
1281 /* check bounds */
1282 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1283 return (ENXIO);
1284 fdc = fd->fdc;
1285 if ((fdc == NULL) || (fd->type == NO_TYPE))
1286 return (ENXIO);
1287 if (type > NUMDENS)
1288 return (ENXIO);
1289 if (type == 0)
1290 type = fd->type;
1291 else {
1292 /*
1293 * For each type of basic drive, make sure we are trying
1294 * to open a type it can do,
1295 */
1296 if (type != fd->type) {
1297 switch (fd->type) {
1298 case FD_360:
1299 return (ENXIO);
1300 case FD_720:
1301 if ( type != FD_820
1302 && type != FD_800
1303 && type != FD_640
1304 )
1305 return (ENXIO);
1306 break;
1307 case FD_1200:
1308 switch (type) {
1309 case FD_1480:
1310 type = FD_1480in5_25;
1311 break;
1312 case FD_1440:
1313 type = FD_1440in5_25;
1314 break;
1315 case FD_1232:
1316 break;
1317 case FD_820:
1318 type = FD_820in5_25;
1319 break;
1320 case FD_800:
1321 type = FD_800in5_25;
1322 break;
1323 case FD_720:
1324 type = FD_720in5_25;
1325 break;
1326 case FD_640:
1327 type = FD_640in5_25;
1328 break;
1329 case FD_360:
1330 type = FD_360in5_25;
1331 break;
1332 default:
1333 return(ENXIO);
1334 }
1335 break;
1336 case FD_1440:
1337 if ( type != FD_1720
1338 && type != FD_1480
1339 && type != FD_1200
1340 && type != FD_820
1341 && type != FD_800
1342 && type != FD_720
1343 && type != FD_640
1344 )
1345 return(ENXIO);
1346 break;
1347 }
1348 }
1349 }
1350 fd->ft = fd_types + type - 1;
1351 fd->flags |= FD_OPEN;
1352 /*
1353 * Clearing the DMA overrun counter at open time is a bit messy.
1354 * Since we're only managing one counter per controller, opening
1355 * the second drive could mess it up. Anyway, if the DMA overrun
1356 * condition is really persistent, it will eventually time out
1357 * still. OTOH, clearing it here will ensure we'll at least start
1358 * trying again after a previous (maybe even long ago) failure.
1359 * Also, this is merely a stop-gap measure only that should not
1360 * happen during normal operation, so we can tolerate it to be a
1361 * bit sloppy about this.
1362 */
1363 fdc->dma_overruns = 0;
1364
1365 return 0;
1366}
1367
1368int
41c20dac 1369fdclose(dev_t dev, int flags, int mode, struct thread *td)
984263bc
MD
1370{
1371 fdu_t fdu = FDUNIT(minor(dev));
1372 struct fd_data *fd;
1373
1374 fd = devclass_get_softc(fd_devclass, fdu);
1375 fd->flags &= ~FD_OPEN;
1376 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1377
1378 return (0);
1379}
1380
1381/****************************************************************************/
1382/* fdstrategy */
1383/****************************************************************************/
1384void
1385fdstrategy(struct buf *bp)
1386{
1387 unsigned nblocks, blknum, cando;
1388 int s;
1389 fdu_t fdu;
1390 fdc_p fdc;
1391 fd_p fd;
1392 size_t fdblk;
1393
1394 fdu = FDUNIT(minor(bp->b_dev));
1395 fd = devclass_get_softc(fd_devclass, fdu);
1396 if (fd == 0)
1397 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1398 (u_long)major(bp->b_dev), (u_long)minor(bp->b_dev));
1399 fdc = fd->fdc;
1400 if (fd->type == NO_TYPE) {
1401 bp->b_error = ENXIO;
1402 bp->b_flags |= B_ERROR;
1403 goto bad;
1404 };
1405
1406 fdblk = 128 << (fd->ft->secsize);
1407 if (!(bp->b_flags & B_FORMAT)) {
1408 if (bp->b_blkno < 0) {
1409 printf(
1410 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
1411 fdu, (u_long)bp->b_blkno, bp->b_bcount);
1412 bp->b_error = EINVAL;
1413 bp->b_flags |= B_ERROR;
1414 goto bad;
1415 }
1416 if ((bp->b_bcount % fdblk) != 0) {
1417 bp->b_error = EINVAL;
1418 bp->b_flags |= B_ERROR;
1419 goto bad;
1420 }
1421 }
1422
1423 /*
1424 * Set up block calculations.
1425 */
1426 if (bp->b_blkno > 20000000) {
1427 /*
1428 * Reject unreasonably high block number, prevent the
1429 * multiplication below from overflowing.
1430 */
1431 bp->b_error = EINVAL;
1432 bp->b_flags |= B_ERROR;
1433 goto bad;
1434 }
1435 blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk;
1436 nblocks = fd->ft->size;
1437 bp->b_resid = 0;
1438 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1439 if (blknum <= nblocks) {
1440 cando = (nblocks - blknum) * fdblk;
1441 bp->b_resid = bp->b_bcount - cando;
1442 if (cando == 0)
1443 goto bad; /* not actually bad but EOF */
1444 } else {
1445 bp->b_error = EINVAL;
1446 bp->b_flags |= B_ERROR;
1447 goto bad;
1448 }
1449 }
1450 bp->b_pblkno = bp->b_blkno;
1451 s = splbio();
1452 bufqdisksort(&fdc->head, bp);
1453 untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */
1454
1455 /* Tell devstat we are starting on the transaction */
1456 devstat_start_transaction(&fd->device_stats);
1457 device_busy(fd->dev);
1458
1459 fdstart(fdc);
1460 splx(s);
1461 return;
1462
1463bad:
1464 biodone(bp);
1465}
1466
1467/***************************************************************\
1468* fdstart *
1469* We have just queued something.. if the controller is not busy *
1470* then simulate the case where it has just finished a command *
1471* So that it (the interrupt routine) looks on the queue for more*
1472* work to do and picks up what we just added. *
1473* If the controller is already busy, we need do nothing, as it *
1474* will pick up our work when the present work completes *
1475\***************************************************************/
1476static void
1477fdstart(struct fdc_data *fdc)
1478{
1479 int s;
1480
1481 s = splbio();
1482 if(fdc->state == DEVIDLE)
1483 {
1484 fdc_intr(fdc);
1485 }
1486 splx(s);
1487}
1488
1489static void
1490fd_iotimeout(void *xfdc)
1491{
1492 fdc_p fdc;
1493 int s;
1494
1495 fdc = xfdc;
1496 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1497
1498 /*
1499 * Due to IBM's brain-dead design, the FDC has a faked ready
1500 * signal, hardwired to ready == true. Thus, any command
1501 * issued if there's no diskette in the drive will _never_
1502 * complete, and must be aborted by resetting the FDC.
1503 * Many thanks, Big Blue!
1504 * The FDC must not be reset directly, since that would
1505 * interfere with the state machine. Instead, pretend that
1506 * the command completed but was invalid. The state machine
1507 * will reset the FDC and retry once.
1508 */
1509 s = splbio();
1510 fdc->status[0] = NE7_ST0_IC_IV;
1511 fdc->flags &= ~FDC_STAT_VALID;
1512 fdc->state = IOTIMEDOUT;
1513 fdc_intr(fdc);
1514 splx(s);
1515}
1516
1517/* just ensure it has the right spl */
1518static void
1519fd_pseudointr(void *xfdc)
1520{
1521 int s;
1522
1523 s = splbio();
1524 fdc_intr(xfdc);
1525 splx(s);
1526}
1527
1528/***********************************************************************\
1529* fdintr *
1530* keep calling the state machine until it returns a 0 *
1531* ALWAYS called at SPLBIO *
1532\***********************************************************************/
1533static void
1534fdc_intr(void *xfdc)
1535{
1536 fdc_p fdc = xfdc;
1537 while(fdstate(fdc))
1538 ;
1539}
1540
1541/*
1542 * magic pseudo-DMA initialization for YE FDC. Sets count and
1543 * direction
1544 */
1545#define SET_BCDR(fdc,wr,cnt,port) \
1546 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1547 ((cnt)-1) & 0xff); \
1548 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1549 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1550
1551/*
1552 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1553 */
1554static int fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count)
1555{
1556 u_char *cptr = (u_char *)addr;
1557
1558 if (flags & B_READ) {
1559 if (fdc->state != PIOREAD) {
1560 fdc->state = PIOREAD;
1561 return(0);
1562 };
1563 SET_BCDR(fdc, 0, count, 0);
1564 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1565 FDC_YE_DATAPORT, cptr, count);
1566 } else {
1567 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1568 FDC_YE_DATAPORT, cptr, count);
1569 SET_BCDR(fdc, 0, count, 0);
1570 };
1571 return(1);
1572}
1573
1574/***********************************************************************\
1575* The controller state machine. *
1576* if it returns a non zero value, it should be called again immediatly *
1577\***********************************************************************/
1578static int
1579fdstate(fdc_p fdc)
1580{
1581 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1582 unsigned blknum = 0, b_cylinder = 0;
1583 fdu_t fdu = fdc->fdu;
1584 fd_p fd;
3a1b0fdc 1585 struct buf *bp;
984263bc
MD
1586 struct fd_formb *finfo = NULL;
1587 size_t fdblk;
1588
1589 bp = fdc->bp;
1590 if (bp == NULL) {
1591 bp = bufq_first(&fdc->head);
1592 if (bp != NULL) {
1593 bufq_remove(&fdc->head, bp);
1594 fdc->bp = bp;
1595 }
1596 }
1597 if (bp == NULL) {
1598 /***********************************************\
1599 * nothing left for this controller to do *
1600 * Force into the IDLE state, *
1601 \***********************************************/
1602 fdc->state = DEVIDLE;
1603 if (fdc->fd) {
1604 device_printf(fdc->fdc_dev,
1605 "unexpected valid fd pointer\n");
1606 fdc->fd = (fd_p) 0;
1607 fdc->fdu = -1;
1608 }
1609 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1610 return (0);
1611 }
1612 fdu = FDUNIT(minor(bp->b_dev));
1613 fd = devclass_get_softc(fd_devclass, fdu);
1614 fdblk = 128 << fd->ft->secsize;
1615 if (fdc->fd && (fd != fdc->fd))
1616 device_printf(fd->dev, "confused fd pointers\n");
1617 read = bp->b_flags & B_READ;
1618 format = bp->b_flags & B_FORMAT;
1619 if (format) {
1620 finfo = (struct fd_formb *)bp->b_data;
1621 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1622 - (char *)finfo;
1623 }
1624 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1625 blknum = (unsigned) bp->b_pblkno * DEV_BSIZE/fdblk +
1626 fd->skip/fdblk;
1627 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1628 }
1629 TRACE1("fd%d", fdu);
1630 TRACE1("[%s]", fdstates[fdc->state]);
1631 TRACE1("(0x%x)", fd->flags);
1632 untimeout(fd_turnoff, fd, fd->toffhandle);
1633 fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz);
1634 switch (fdc->state)
1635 {
1636 case DEVIDLE:
1637 case FINDWORK: /* we have found new work */
1638 fdc->retry = 0;
1639 fd->skip = 0;
1640 fdc->fd = fd;
1641 fdc->fdu = fdu;
1642 fdc->fdctl_wr(fdc, fd->ft->trans);
1643 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1644 /*******************************************************\
1645 * If the next drive has a motor startup pending, then *
1646 * it will start up in its own good time *
1647 \*******************************************************/
1648 if(fd->flags & FD_MOTOR_WAIT) {
1649 fdc->state = MOTORWAIT;
1650 return (0); /* come back later */
1651 }
1652 /*******************************************************\
1653 * Maybe if it's not starting, it SHOULD be starting *
1654 \*******************************************************/
1655 if (!(fd->flags & FD_MOTOR))
1656 {
1657 fdc->state = MOTORWAIT;
1658 fd_turnon(fd);
1659 return (0);
1660 }
1661 else /* at least make sure we are selected */
1662 {
1663 set_motor(fdc, fd->fdsu, TURNON);
1664 }
1665 if (fdc->flags & FDC_NEEDS_RESET) {
1666 fdc->state = RESETCTLR;
1667 fdc->flags &= ~FDC_NEEDS_RESET;
1668 } else
1669 fdc->state = DOSEEK;
1670 break;
1671 case DOSEEK:
1672 if (b_cylinder == (unsigned)fd->track)
1673 {
1674 fdc->state = SEEKCOMPLETE;
1675 break;
1676 }
1677 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1678 fd->fdsu, b_cylinder * fd->ft->steptrac,
1679 0))
1680 {
1681 /*
1682 * seek command not accepted, looks like
1683 * the FDC went off to the Saints...
1684 */
1685 fdc->retry = 6; /* try a reset */
1686 return(retrier(fdc));
1687 }
1688 fd->track = FD_NO_TRACK;
1689 fdc->state = SEEKWAIT;
1690 return(0); /* will return later */
1691 case SEEKWAIT:
1692 /* allow heads to settle */
1693 timeout(fd_pseudointr, fdc, hz / 16);
1694 fdc->state = SEEKCOMPLETE;
1695 return(0); /* will return later */
1696 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1697 /* Make sure seek really happened*/
1698 if(fd->track == FD_NO_TRACK) {
1699 int descyl = b_cylinder * fd->ft->steptrac;
1700 do {
1701 /*
1702 * This might be a "ready changed" interrupt,
1703 * which cannot really happen since the
1704 * RDY pin is hardwired to + 5 volts. This
1705 * generally indicates a "bouncing" intr
1706 * line, so do one of the following:
1707 *
1708 * When running on an enhanced FDC that is
1709 * known to not go stuck after responding
1710 * with INVALID, fetch all interrupt states
1711 * until seeing either an INVALID or a
1712 * real interrupt condition.
1713 *
1714 * When running on a dumb old NE765, give
1715 * up immediately. The controller will
1716 * provide up to four dummy RC interrupt
1717 * conditions right after reset (for the
1718 * corresponding four drives), so this is
1719 * our only chance to get notice that it
1720 * was not the FDC that caused the interrupt.
1721 */
1722 if (fd_sense_int(fdc, &st0, &cyl)
1723 == FD_NOT_VALID)
1724 return 0;
1725 if(fdc->fdct == FDC_NE765
1726 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1727 return 0; /* hope for a real intr */
1728 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1729
1730 if (0 == descyl) {
1731 int failed = 0;
1732 /*
1733 * seek to cyl 0 requested; make sure we are
1734 * really there
1735 */
1736 if (fd_sense_drive_status(fdc, &st3))
1737 failed = 1;
1738 if ((st3 & NE7_ST3_T0) == 0) {
1739 printf(
1740 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1741 fdu, st3, NE7_ST3BITS);
1742 failed = 1;
1743 }
1744
1745 if (failed) {
1746 if(fdc->retry < 3)
1747 fdc->retry = 3;
1748 return (retrier(fdc));
1749 }
1750 }
1751
1752 if (cyl != descyl) {
1753 printf(
1754 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1755 fdu, descyl, cyl, st0);
1756 if (fdc->retry < 3)
1757 fdc->retry = 3;
1758 return (retrier(fdc));
1759 }
1760 }
1761
1762 fd->track = b_cylinder;
1763 if (!(fdc->flags & FDC_NODMA))
1764 isa_dmastart(bp->b_flags, bp->b_data+fd->skip,
1765 format ? bp->b_bcount : fdblk, fdc->dmachan);
1766 sectrac = fd->ft->sectrac;
1767 sec = blknum % (sectrac * fd->ft->heads);
1768 head = sec / sectrac;
1769 sec = sec % sectrac + 1;
1770 fd->hddrv = ((head&1)<<2)+fdu;
1771
1772 if(format || !read)
1773 {
1774 /* make sure the drive is writable */
1775 if(fd_sense_drive_status(fdc, &st3) != 0)
1776 {
1777 /* stuck controller? */
1778 if (!(fdc->flags & FDC_NODMA))
1779 isa_dmadone(bp->b_flags,
1780 bp->b_data + fd->skip,
1781 format ? bp->b_bcount : fdblk,
1782 fdc->dmachan);
1783 fdc->retry = 6; /* reset the beast */
1784 return (retrier(fdc));
1785 }
1786 if(st3 & NE7_ST3_WP)
1787 {
1788 /*
1789 * XXX YES! this is ugly.
1790 * in order to force the current operation
1791 * to fail, we will have to fake an FDC
1792 * error - all error handling is done
1793 * by the retrier()
1794 */
1795 fdc->status[0] = NE7_ST0_IC_AT;
1796 fdc->status[1] = NE7_ST1_NW;
1797 fdc->status[2] = 0;
1798 fdc->status[3] = fd->track;
1799 fdc->status[4] = head;
1800 fdc->status[5] = sec;
1801 fdc->retry = 8; /* break out immediately */
1802 fdc->state = IOTIMEDOUT; /* not really... */
1803 return (1);
1804 }
1805 }
1806
1807 if (format) {
1808 if (fdc->flags & FDC_NODMA) {
1809 /*
1810 * This seems to be necessary for
1811 * whatever obscure reason; if we omit
1812 * it, we end up filling the sector ID
1813 * fields of the newly formatted track
1814 * entirely with garbage, causing
1815 * `wrong cylinder' errors all over
1816 * the place when trying to read them
1817 * back.
1818 *
1819 * Umpf.
1820 */
1821 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1822
1823 (void)fdcpio(fdc,bp->b_flags,
1824 bp->b_data+fd->skip,
1825 bp->b_bcount);
1826
1827 }
1828 /* formatting */
1829 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1830 finfo->fd_formb_secshift,
1831 finfo->fd_formb_nsecs,
1832 finfo->fd_formb_gaplen,
1833 finfo->fd_formb_fillbyte, 0)) {
1834 /* controller fell over */
1835 if (!(fdc->flags & FDC_NODMA))
1836 isa_dmadone(bp->b_flags,
1837 bp->b_data + fd->skip,
1838 format ? bp->b_bcount : fdblk,
1839 fdc->dmachan);
1840 fdc->retry = 6;
1841 return (retrier(fdc));
1842 }
1843 } else {
1844 if (fdc->flags & FDC_NODMA) {
1845 /*
1846 * this seems to be necessary even when
1847 * reading data
1848 */
1849 SET_BCDR(fdc, 1, fdblk, 0);
1850
1851 /*
1852 * perform the write pseudo-DMA before
1853 * the WRITE command is sent
1854 */
1855 if (!read)
1856 (void)fdcpio(fdc,bp->b_flags,
1857 bp->b_data+fd->skip,
1858 fdblk);
1859 }
1860 if (fd_cmd(fdc, 9,
1861 (read ? NE7CMD_READ : NE7CMD_WRITE),
1862 head << 2 | fdu, /* head & unit */
1863 fd->track, /* track */
1864 head,
1865 sec, /* sector + 1 */
1866 fd->ft->secsize, /* sector size */
1867 sectrac, /* sectors/track */
1868 fd->ft->gap, /* gap size */
1869 fd->ft->datalen, /* data length */
1870 0)) {
1871 /* the beast is sleeping again */
1872 if (!(fdc->flags & FDC_NODMA))
1873 isa_dmadone(bp->b_flags,
1874 bp->b_data + fd->skip,
1875 format ? bp->b_bcount : fdblk,
1876 fdc->dmachan);
1877 fdc->retry = 6;
1878 return (retrier(fdc));
1879 }
1880 }
1881 if (fdc->flags & FDC_NODMA)
1882 /*
1883 * if this is a read, then simply await interrupt
1884 * before performing PIO
1885 */
1886 if (read && !fdcpio(fdc,bp->b_flags,
1887 bp->b_data+fd->skip,fdblk)) {
1888 fd->tohandle = timeout(fd_iotimeout, fdc, hz);
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;
1897 fd->tohandle = timeout(fd_iotimeout, fdc, hz);
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 */
1908 untimeout(fd_iotimeout, fdc, fd->tohandle);
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;
1967 fdc->bp = NULL;
1968 device_unbusy(fd->dev);
1969 devstat_end_transaction_buf(&fd->device_stats, bp);
1970 biodone(bp);
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 */
2000 timeout(fd_pseudointr, fdc, hz / 8);
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{
3a1b0fdc 2080 struct buf *bp;
984263bc
MD
2081 struct fd_data *fd;
2082 int fdu;
2083
2084 bp = fdc->bp;
2085
2086 /* XXX shouldn't this be cached somewhere? */
2087 fdu = FDUNIT(minor(bp->b_dev));
2088 fd = devclass_get_softc(fd_devclass, fdu);
2089 if (fd->options & FDOPT_NORETRY)
2090 goto fail;
2091
2092 switch (fdc->retry) {
2093 case 0: case 1: case 2:
2094 fdc->state = SEEKCOMPLETE;
2095 break;
2096 case 3: case 4: case 5:
2097 fdc->state = STARTRECAL;
2098 break;
2099 case 6:
2100 fdc->state = RESETCTLR;
2101 break;
2102 case 7:
2103 break;
2104 default:
2105 fail:
2106 {
2107 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2108 dev_t sav_b_dev = bp->b_dev;
2109
2110 /* Trick diskerr */
2111 bp->b_dev = makedev(major(bp->b_dev),
2112 (FDUNIT(minor(bp->b_dev))<<3)|RAW_PART);
2113 if (printerror)
2114 diskerr(bp, "hard error", LOG_PRINTF,
2115 fdc->fd->skip / DEV_BSIZE,
2116 (struct disklabel *)NULL);
2117 bp->b_dev = sav_b_dev;
2118 if (printerror) {
2119 if (fdc->flags & FDC_STAT_VALID)
2120 printf(
2121 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2122 fdc->status[0], NE7_ST0BITS,
2123 fdc->status[1], NE7_ST1BITS,
2124 fdc->status[2], NE7_ST2BITS,
2125 fdc->status[3], fdc->status[4],
2126 fdc->status[5]);
2127 else
2128 printf(" (No status)\n");
2129 }
2130 }
2131 bp->b_flags |= B_ERROR;
2132 bp->b_error = EIO;
2133 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2134 fdc->bp = NULL;
2135 fdc->fd->skip = 0;
2136 device_unbusy(fd->dev);
2137 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2138 biodone(bp);
2139 fdc->state = FINDWORK;
2140 fdc->flags |= FDC_NEEDS_RESET;
2141 fdc->fd = (fd_p) 0;
2142 fdc->fdu = -1;
2143 return (1);
2144 }
2145 fdc->retry++;
2146 return (1);
2147}
2148
2149static int
41c20dac 2150fdformat(dev_t dev, struct fd_formb *finfo, struct thread *td)
984263bc 2151{
41c20dac 2152 struct proc *p = td->td_proc;
984263bc
MD
2153 fdu_t fdu;
2154 fd_p fd;
2155
2156 struct buf *bp;
2157 int rv = 0, s;
2158 size_t fdblk;
2159
2160 fdu = FDUNIT(minor(dev));
2161 fd = devclass_get_softc(fd_devclass, fdu);
2162 fdblk = 128 << fd->ft->secsize;
2163
2164 /* set up a buffer header for fdstrategy() */
2165 bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT);
2166 if(bp == 0)
2167 return ENOBUFS;
2168 /*
2169 * keep the process from being swapped
2170 */
2171 PHOLD(p);
2172 bzero((void *)bp, sizeof(struct buf));
2173 BUF_LOCKINIT(bp);
2174 BUF_LOCK(bp, LK_EXCLUSIVE);
2175 bp->b_flags = B_PHYS | B_FORMAT;
2176
2177 /*
2178 * calculate a fake blkno, so fdstrategy() would initiate a
2179 * seek to the requested cylinder
2180 */
2181 bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
2182 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
2183
2184 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2185 bp->b_data = (caddr_t)finfo;
2186
2187 /* now do the format */
2188 bp->b_dev = dev;
2189 BUF_STRATEGY(bp, 0);
2190
2191 /* ...and wait for it to complete */
2192 s = splbio();
2193 while(!(bp->b_flags & B_DONE)) {
377d4740 2194 rv = tsleep((caddr_t)bp, 0, "fdform", 20 * hz);
984263bc
MD
2195 if (rv == EWOULDBLOCK)
2196 break;
2197 }
2198 splx(s);
2199
2200 if (rv == EWOULDBLOCK) {
2201 /* timed out */
2202 rv = EIO;
2203 device_unbusy(fd->dev);
2204 biodone(bp);
2205 }
2206 if (bp->b_flags & B_ERROR)
2207 rv = bp->b_error;
2208 /*
2209 * allow the process to be swapped
2210 */
2211 PRELE(p);
2212 BUF_UNLOCK(bp);
2213 BUF_LOCKFREE(bp);
2214 free(bp, M_TEMP);
2215 return rv;
2216}
2217
2218/*
2219 * TODO: don't allocate buffer on stack.
2220 */
2221
2222static int
41c20dac 2223fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
984263bc
MD
2224{
2225 fdu_t fdu = FDUNIT(minor(dev));
2226 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2227 size_t fdblk;
2228
2229 struct fd_type *fdt;
2230 struct disklabel *dl;
2231 struct fdc_status *fsp;
2232 char buffer[DEV_BSIZE];
2233 int error = 0;
2234
2235 fdblk = 128 << fd->ft->secsize;
2236
2237 switch (cmd) {
2238 case DIOCGDINFO:
2239 bzero(buffer, sizeof (buffer));
2240 dl = (struct disklabel *)buffer;
2241 dl->d_secsize = fdblk;
2242 fdt = fd->ft;
2243 dl->d_secpercyl = fdt->size / fdt->tracks;
2244 dl->d_type = DTYPE_FLOPPY;
2245
2246 if (readdisklabel(dev, dl)
2247 == NULL)
2248 error = 0;
2249 else
2250 error = EINVAL;
2251
2252 *(struct disklabel *)addr = *dl;
2253 break;
2254
2255 case DIOCSDINFO:
2256 if ((flag & FWRITE) == 0)
2257 error = EBADF;
2258 break;
2259
2260 case DIOCWLABEL:
2261 if ((flag & FWRITE) == 0)
2262 error = EBADF;
2263 break;
2264
2265 case DIOCWDINFO:
2266 if ((flag & FWRITE) == 0) {
2267 error = EBADF;
2268 break;
2269 }
2270
2271 dl = (struct disklabel *)addr;
2272
2273 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2274 (u_long)0)) != 0)
2275 break;
2276
2277 error = writedisklabel(dev, (struct disklabel *)buffer);
2278 break;
2279 case FD_FORM:
2280 if ((flag & FWRITE) == 0)
2281 error = EBADF; /* must be opened for writing */
2282 else if (((struct fd_formb *)addr)->format_version !=
2283 FD_FORMAT_VERSION)
2284 error = EINVAL; /* wrong version of formatting prog */
2285 else
41c20dac 2286 error = fdformat(dev, (struct fd_formb *)addr, td);
984263bc
MD
2287 break;
2288
2289 case FD_GTYPE: /* get drive type */
2290 *(struct fd_type *)addr = *fd->ft;
2291 break;
2292
2293 case FD_STYPE: /* set drive type */
2294 /* this is considered harmful; only allow for superuser */
dadab5e9 2295 if (suser(td) != 0)
984263bc
MD
2296 return EPERM;
2297 *fd->ft = *(struct fd_type *)addr;
2298 break;
2299
2300 case FD_GOPTS: /* get drive options */
2301 *(int *)addr = fd->options;
2302 break;
2303
2304 case FD_SOPTS: /* set drive options */
2305 fd->options = *(int *)addr;
2306 break;
2307
2308 case FD_GSTAT:
2309 fsp = (struct fdc_status *)addr;
2310 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2311 return EINVAL;
2312 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2313 break;
2314
2315 default:
2316 error = ENOTTY;
2317 break;
2318 }
2319 return (error);
2320}
2321
2322/*
2323 * Hello emacs, these are the
2324 * Local Variables:
2325 * c-indent-level: 8
2326 * c-continued-statement-offset: 8
2327 * c-continued-brace-offset: 0
2328 * c-brace-offset: -8
2329 * c-brace-imaginary-offset: 0
2330 * c-argdecl-indent: 8
2331 * c-label-offset: -8
2332 * c++-hanging-braces: 1
2333 * c++-access-specifier-offset: -8
2334 * c++-empty-arglist-indent: 8
2335 * c++-friend-offset: 0
2336 * End:
2337 */