Fix a minor bug that prevented compilation.
[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 $
014958fd 54 * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.30 2006/05/24 21:50:11 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>
984263bc 94
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95/* configuration flags */
96#define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
97#define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
98
99/* internally used only, not really from CMOS: */
100#define RTCFDT_144M_PRETENDED 0x1000
101
102/* error returns for fd_cmd() */
103#define FD_FAILED -1
104#define FD_NOT_VALID -2
105#define FDC_ERRMAX 100 /* do not log more */
106/*
107 * Stop retrying after this many DMA overruns. Since each retry takes
108 * one revolution, with 300 rpm., 25 retries take approximately 10
109 * seconds which the read attempt will block in case the DMA overrun
110 * is persistent.
111 */
112#define FDC_DMAOV_MAX 25
113
114/*
115 * Timeout value for the PIO loops to wait until the FDC main status
116 * register matches our expectations (request for master, direction
117 * bit). This is supposed to be a number of microseconds, although
118 * timing might actually not be very accurate.
119 *
120 * Timeouts of 100 msec are believed to be required for some broken
121 * (old) hardware.
122 */
123#define FDSTS_TIMEOUT 100000
124
125#define NUMTYPES 17
126#define NUMDENS (NUMTYPES - 7)
127
128/* These defines (-1) must match index for fd_types */
129#define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
130#define NO_TYPE 0 /* must match NO_TYPE in ft.c */
131#define FD_1720 1
132#define FD_1480 2
133#define FD_1440 3
134#define FD_1200 4
135#define FD_820 5
136#define FD_800 6
137#define FD_720 7
138#define FD_360 8
139#define FD_640 9
140#define FD_1232 10
141
142#define FD_1480in5_25 11
143#define FD_1440in5_25 12
144#define FD_820in5_25 13
145#define FD_800in5_25 14
146#define FD_720in5_25 15
147#define FD_360in5_25 16
148#define FD_640in5_25 17
149
150
151static struct fd_type fd_types[NUMTYPES] =
152{
153{ 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
154{ 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
155{ 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
156{ 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
157{ 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
158{ 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
159{ 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
160{ 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
161{ 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
162{ 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
163
164{ 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
165{ 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
166{ 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
167{ 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
168{ 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
169{ 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
170{ 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
171};
172
173#define DRVS_PER_CTLR 2 /* 2 floppies */
174
175/***********************************************************************\
176* Per controller structure. *
177\***********************************************************************/
8c5c0470 178devclass_t fdc_devclass;
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179
180/***********************************************************************\
181* Per drive structure. *
182* N per controller (DRVS_PER_CTLR) *
183\***********************************************************************/
184struct fd_data {
185 struct fdc_data *fdc; /* pointer to controller structure */
186 int fdsu; /* this units number on this controller */
187 int type; /* Drive type (FD_1440...) */
188 struct fd_type *ft; /* pointer to the type descriptor */
189 int flags;
190#define FD_OPEN 0x01 /* it's open */
191#define FD_ACTIVE 0x02 /* it's active */
192#define FD_MOTOR 0x04 /* motor should be on */
193#define FD_MOTOR_WAIT 0x08 /* motor coming up */
194 int skip;
195 int hddrv;
196#define FD_NO_TRACK -2
197 int track; /* where we think the head is */
198 int options; /* user configurable options, see ioctl_fd.h */
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199 struct callout toffhandle;
200 struct callout tohandle;
4fc46503 201 struct callout motor;
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202 struct devstat device_stats;
203 device_t dev;
204 fdu_t fdu;
205};
206
207struct fdc_ivars {
208 int fdunit;
209};
210static devclass_t fd_devclass;
211
212/***********************************************************************\
213* Throughout this file the following conventions will be used: *
214* fd is a pointer to the fd_data struct for the drive in question *
215* fdc is a pointer to the fdc_data struct for the controller *
216* fdu is the floppy drive unit number *
217* fdcu is the floppy controller unit number *
218* fdsu is the floppy drive unit number on that controller. (sub-unit) *
219\***********************************************************************/
220
221/* internal functions */
222static void fdc_intr(void *);
223static void set_motor(struct fdc_data *, int, int);
224# define TURNON 1
225# define TURNOFF 0
226static timeout_t fd_turnoff;
227static timeout_t fd_motor_on;
228static void fd_turnon(struct fd_data *);
229static void fdc_reset(fdc_p);
230static int fd_in(struct fdc_data *, int *);
231static int out_fdc(struct fdc_data *, int);
232static void fdstart(struct fdc_data *);
233static timeout_t fd_iotimeout;
234static timeout_t fd_pseudointr;
235static int fdstate(struct fdc_data *);
236static int retrier(struct fdc_data *);
41c20dac 237static int fdformat(dev_t, struct fd_formb *, struct thread *);
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238
239static int enable_fifo(fdc_p fdc);
240
241static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
242
243
244#define DEVIDLE 0
245#define FINDWORK 1
246#define DOSEEK 2
247#define SEEKCOMPLETE 3
248#define IOCOMPLETE 4
249#define RECALCOMPLETE 5
250#define STARTRECAL 6
251#define RESETCTLR 7
252#define SEEKWAIT 8
253#define RECALWAIT 9
254#define MOTORWAIT 10
255#define IOTIMEDOUT 11
256#define RESETCOMPLETE 12
257#define PIOREAD 13
258
259#ifdef FDC_DEBUG
260static char const * const fdstates[] =
261{
262"DEVIDLE",
263"FINDWORK",
264"DOSEEK",
265"SEEKCOMPLETE",
266"IOCOMPLETE",
267"RECALCOMPLETE",
268"STARTRECAL",
269"RESETCTLR",
270"SEEKWAIT",
271"RECALWAIT",
272"MOTORWAIT",
273"IOTIMEDOUT",
274"RESETCOMPLETE",
275"PIOREAD",
276};
277
278/* CAUTION: fd_debug causes huge amounts of logging output */
279static int volatile fd_debug = 0;
280#define TRACE0(arg) if(fd_debug) printf(arg)
281#define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2)
282#else /* FDC_DEBUG */
283#define TRACE0(arg)
284#define TRACE1(arg1, arg2)
285#endif /* FDC_DEBUG */
286
8c5c0470 287void
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288fdout_wr(fdc_p fdc, u_int8_t v)
289{
290 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
291}
292
293static u_int8_t
294fdsts_rd(fdc_p fdc)
295{
296 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
297}
298
299static void
300fddata_wr(fdc_p fdc, u_int8_t v)
301{
302 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
303}
304
305static u_int8_t
306fddata_rd(fdc_p fdc)
307{
308 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
309}
310
311static void
312fdctl_wr_isa(fdc_p fdc, u_int8_t v)
313{
314 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
315}
316
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317#if 0
318
319static u_int8_t
320fdin_rd(fdc_p fdc)
321{
322 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
323}
324
325#endif
326
327static d_open_t Fdopen; /* NOTE, not fdopen */
328static d_close_t fdclose;
329static d_ioctl_t fdioctl;
330static d_strategy_t fdstrategy;
331
984263bc 332static struct cdevsw fd_cdevsw = {
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333 /* name */ "fd",
334 /* maj */ FD_CDEV_MAJOR,
335 /* flags */ D_DISK,
336 /* port */ NULL,
455fcd7e 337 /* clone */ NULL,
fabb8ceb 338
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339 /* open */ Fdopen,
340 /* close */ fdclose,
341 /* read */ physread,
342 /* write */ physwrite,
343 /* ioctl */ fdioctl,
344 /* poll */ nopoll,
345 /* mmap */ nommap,
346 /* strategy */ fdstrategy,
984263bc 347 /* dump */ nodump,
fabb8ceb 348 /* psize */ nopsize
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349};
350
351static int
352fdc_err(struct fdc_data *fdc, const char *s)
353{
354 fdc->fdc_errs++;
355 if (s) {
356 if (fdc->fdc_errs < FDC_ERRMAX)
357 device_printf(fdc->fdc_dev, "%s", s);
358 else if (fdc->fdc_errs == FDC_ERRMAX)
359 device_printf(fdc->fdc_dev, "too many errors, not "
360 "logging any more\n");
361 }
362
363 return FD_FAILED;
364}
365
366/*
367 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
368 * Unit number,
369 * # of output bytes, output bytes as ints ...,
370 * # of input bytes, input bytes as ints ...
371 */
8c5c0470 372int
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373fd_cmd(struct fdc_data *fdc, int n_out, ...)
374{
375 u_char cmd;
376 int n_in;
377 int n;
e2565a42 378 __va_list ap;
984263bc 379
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380 __va_start(ap, n_out);
381 cmd = (u_char)(__va_arg(ap, int));
382 __va_end(ap);
383 __va_start(ap, n_out);
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384 for (n = 0; n < n_out; n++)
385 {
e2565a42 386 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
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387 {
388 char msg[50];
389 snprintf(msg, sizeof(msg),
390 "cmd %x failed at out byte %d of %d\n",
391 cmd, n + 1, n_out);
392 return fdc_err(fdc, msg);
393 }
394 }
e2565a42 395 n_in = __va_arg(ap, int);
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396 for (n = 0; n < n_in; n++)
397 {
e2565a42 398 int *ptr = __va_arg(ap, int *);
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399 if (fd_in(fdc, ptr) < 0)
400 {
401 char msg[50];
402 snprintf(msg, sizeof(msg),
403 "cmd %02x failed at in byte %d of %d\n",
404 cmd, n + 1, n_in);
405 return fdc_err(fdc, msg);
406 }
407 }
408
409 return 0;
410}
411
412static int
413enable_fifo(fdc_p fdc)
414{
415 int i, j;
416
417 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
418
419 /*
420 * XXX:
421 * Cannot use fd_cmd the normal way here, since
422 * this might be an invalid command. Thus we send the
423 * first byte, and check for an early turn of data directon.
424 */
425
426 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
427 return fdc_err(fdc, "Enable FIFO failed\n");
428
429 /* If command is invalid, return */
430 j = FDSTS_TIMEOUT;
431 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
432 != NE7_RQM && j-- > 0) {
433 if (i == (NE7_DIO | NE7_RQM)) {
434 fdc_reset(fdc);
435 return FD_FAILED;
436 }
437 DELAY(1);
438 }
439 if (j<0 ||
440 fd_cmd(fdc, 3,
441 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
442 fdc_reset(fdc);
443 return fdc_err(fdc, "Enable FIFO failed\n");
444 }
445 fdc->flags |= FDC_HAS_FIFO;
446 return 0;
447 }
448 if (fd_cmd(fdc, 4,
449 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
450 return fdc_err(fdc, "Re-enable FIFO failed\n");
451 return 0;
452}
453
454static int
455fd_sense_drive_status(fdc_p fdc, int *st3p)
456{
457 int st3;
458
459 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
460 {
461 return fdc_err(fdc, "Sense Drive Status failed\n");
462 }
463 if (st3p)
464 *st3p = st3;
465
466 return 0;
467}
468
469static int
470fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
471{
472 int cyl, st0, ret;
473
474 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
475 if (ret) {
476 (void)fdc_err(fdc,
477 "sense intr err reading stat reg 0\n");
478 return ret;
479 }
480
481 if (st0p)
482 *st0p = st0;
483
484 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
485 /*
486 * There doesn't seem to have been an interrupt.
487 */
488 return FD_NOT_VALID;
489 }
490
491 if (fd_in(fdc, &cyl) < 0) {
492 return fdc_err(fdc, "can't get cyl num\n");
493 }
494
495 if (cylp)
496 *cylp = cyl;
497
498 return 0;
499}
500
501
502static int
503fd_read_status(fdc_p fdc, int fdsu)
504{
505 int i, ret;
506
507 for (i = 0; i < 7; i++) {
508 /*
509 * XXX types are poorly chosen. Only bytes can by read
510 * from the hardware, but fdc->status[] wants u_ints and
511 * fd_in() gives ints.
512 */
513 int status;
514
515 ret = fd_in(fdc, &status);
516 fdc->status[i] = status;
517 if (ret != 0)
518 break;
519 }
520
521 if (ret == 0)
522 fdc->flags |= FDC_STAT_VALID;
523 else
524 fdc->flags &= ~FDC_STAT_VALID;
525
526 return ret;
527}
528
529/****************************************************************************/
530/* autoconfiguration stuff */
531/****************************************************************************/
532
8c5c0470 533int
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534fdc_alloc_resources(struct fdc_data *fdc)
535{
536 device_t dev;
537 int ispnp, ispcmcia;
538
539 dev = fdc->fdc_dev;
540 ispnp = (fdc->flags & FDC_ISPNP) != 0;
541 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
542 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
543 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
544
545 /*
546 * On standard ISA, we don't just use an 8 port range
547 * (e.g. 0x3f0-0x3f7) since that covers an IDE control
548 * register at 0x3f6.
549 *
550 * Isn't PC hardware wonderful.
551 *
552 * The Y-E Data PCMCIA FDC doesn't have this problem, it
553 * uses the register with offset 6 for pseudo-DMA, and the
554 * one with offset 7 as control register.
555 */
556 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
557 &fdc->rid_ioport, 0ul, ~0ul,
558 ispcmcia ? 8 : (ispnp ? 1 : 6),
559 RF_ACTIVE);
560 if (fdc->res_ioport == 0) {
561 device_printf(dev, "cannot reserve I/O port range\n");
562 return ENXIO;
563 }
564 fdc->portt = rman_get_bustag(fdc->res_ioport);
565 fdc->porth = rman_get_bushandle(fdc->res_ioport);
566
567 if (!ispcmcia) {
568 /*
569 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
570 * and some at 0x3f0-0x3f5,0x3f7. We detect the former
571 * by checking the size and adjust the port address
572 * accordingly.
573 */
574 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
575 fdc->port_off = -2;
576
577 /*
578 * Register the control port range as rid 1 if it
579 * isn't there already. Most PnP BIOSen will have
580 * already done this but non-PnP configurations don't.
581 *
582 * And some (!!) report 0x3f2-0x3f5 and completely
583 * leave out the control register! It seems that some
584 * non-antique controller chips have a different
585 * method of programming the transfer speed which
586 * doesn't require the control register, but it's
587 * mighty bogus as the chip still responds to the
588 * address for the control register.
589 */
590 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
591 u_long ctlstart;
592
593 /* Find the control port, usually 0x3f7 */
594 ctlstart = rman_get_start(fdc->res_ioport) +
595 fdc->port_off + 7;
596
597 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
598 }
599
600 /*
601 * Now (finally!) allocate the control port.
602 */
603 fdc->rid_ctl = 1;
604 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
605 &fdc->rid_ctl,
606 0ul, ~0ul, 1, RF_ACTIVE);
607 if (fdc->res_ctl == 0) {
608 device_printf(dev,
609 "cannot reserve control I/O port range\n");
610 return ENXIO;
611 }
612 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
613 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
614 }
615
616 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
617 &fdc->rid_irq, 0ul, ~0ul, 1,
618 RF_ACTIVE);
619 if (fdc->res_irq == 0) {
620 device_printf(dev, "cannot reserve interrupt line\n");
621 return ENXIO;
622 }
623
624 if ((fdc->flags & FDC_NODMA) == 0) {
625 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
626 &fdc->rid_drq, 0ul, ~0ul, 1,
627 RF_ACTIVE);
628 if (fdc->res_drq == 0) {
629 device_printf(dev, "cannot reserve DMA request line\n");
630 return ENXIO;
631 }
632 fdc->dmachan = fdc->res_drq->r_start;
633 }
634
635 return 0;
636}
637
8c5c0470 638void
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639fdc_release_resources(struct fdc_data *fdc)
640{
641 device_t dev;
642
643 dev = fdc->fdc_dev;
644 if (fdc->res_irq != 0) {
645 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
646 fdc->res_irq);
647 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
648 fdc->res_irq);
649 }
650 if (fdc->res_ctl != 0) {
651 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
652 fdc->res_ctl);
653 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
654 fdc->res_ctl);
655 }
656 if (fdc->res_ioport != 0) {
657 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
658 fdc->res_ioport);
659 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
660 fdc->res_ioport);
661 }
662 if (fdc->res_drq != 0) {
663 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
664 fdc->res_drq);
665 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
666 fdc->res_drq);
667 }
668}
669
670/****************************************************************************/
671/* autoconfiguration stuff */
672/****************************************************************************/
673
674static struct isa_pnp_id fdc_ids[] = {
675 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
676 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
677 {0}
678};
679
8c5c0470 680int
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681fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
682{
683 struct fdc_ivars *ivars = device_get_ivars(child);
684
685 switch (which) {
686 case FDC_IVAR_FDUNIT:
687 *result = ivars->fdunit;
688 break;
689 default:
690 return ENOENT;
691 }
692 return 0;
693}
694
695/*
696 * fdc controller section.
697 */
698static int
699fdc_probe(device_t dev)
700{
701 int error, ic_type;
702 struct fdc_data *fdc;
703
704 fdc = device_get_softc(dev);
705 bzero(fdc, sizeof *fdc);
706 fdc->fdc_dev = dev;
707 fdc->fdctl_wr = fdctl_wr_isa;
708
709 /* Check pnp ids */
710 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
711 if (error == ENXIO)
712 return ENXIO;
713 if (error == 0)
714 fdc->flags |= FDC_ISPNP;
715
716 /* Attempt to allocate our resources for the duration of the probe */
717 error = fdc_alloc_resources(fdc);
718 if (error)
719 goto out;
720
721 /* First - lets reset the floppy controller */
722 fdout_wr(fdc, 0);
723 DELAY(100);
724 fdout_wr(fdc, FDO_FRST);
725
726 /* see if it can handle a command */
727 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
728 NE7_SPEC_2(2, 0), 0)) {
729 error = ENXIO;
730 goto out;
731 }
732
733 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
734 ic_type = (u_char)ic_type;
735 switch (ic_type) {
736 case 0x80:
737 device_set_desc(dev, "NEC 765 or clone");
738 fdc->fdct = FDC_NE765;
739 break;
740 case 0x81:
741 device_set_desc(dev, "Intel 82077 or clone");
742 fdc->fdct = FDC_I82077;
743 break;
744 case 0x90:
745 device_set_desc(dev, "NEC 72065B or clone");
746 fdc->fdct = FDC_NE72065;
747 break;
748 default:
749 device_set_desc(dev, "generic floppy controller");
750 fdc->fdct = FDC_UNKNOWN;
751 break;
752 }
753 }
754
755out:
756 fdc_release_resources(fdc);
757 return (error);
758}
759
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760/*
761 * Add a child device to the fdc controller. It will then be probed etc.
762 */
763static void
764fdc_add_child(device_t dev, const char *name, int unit)
765{
766 int disabled;
767 struct fdc_ivars *ivar;
768 device_t child;
769
3aed1355 770 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
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771 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
772 ivar->fdunit = 0;
773 child = device_add_child(dev, name, unit);
774 if (child == NULL)
775 return;
776 device_set_ivars(child, ivar);
777 if (resource_int_value(name, unit, "disabled", &disabled) == 0
778 && disabled != 0)
779 device_disable(child);
780}
781
8c5c0470 782int
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783fdc_attach(device_t dev)
784{
785 struct fdc_data *fdc;
786 int i, error;
787
788 fdc = device_get_softc(dev);
8b97cf2a
JS
789
790 callout_init(&fdc->pseudointr_ch);
791
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792 error = fdc_alloc_resources(fdc);
793 if (error) {
794 device_printf(dev, "cannot re-aquire resources\n");
795 return error;
796 }
797 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
ee61f228 798 0, fdc_intr, fdc,
e9cb6d99 799 &fdc->fdc_intr, NULL);
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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)));
81b5c339 817 bioq_init(&fdc->bio_queue);
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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
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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
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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;
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MD
980 callout_init(&fd->toffhandle);
981 callout_init(&fd->tohandle);
4fc46503 982 callout_init(&fd->motor);
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983
984 switch (fdt) {
985 case RTCFDT_12M:
986 device_set_desc(dev, "1200-KB 5.25\" drive");
987 fd->type = FD_1200;
988 break;
989 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
990 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
991 fdt = RTCFDT_144M;
992 fd->type = FD_1440;
993 case RTCFDT_144M:
994 device_set_desc(dev, "1440-KB 3.5\" drive");
995 fd->type = FD_1440;
996 break;
997 case RTCFDT_288M:
998 case RTCFDT_288M_1:
999 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
1000 fd->type = FD_1440;
1001 break;
1002 case RTCFDT_360K:
1003 device_set_desc(dev, "360-KB 5.25\" drive");
1004 fd->type = FD_360;
1005 break;
1006 case RTCFDT_720K:
1007 printf("720-KB 3.5\" drive");
1008 fd->type = FD_720;
1009 break;
1010 default:
1011 return (ENXIO);
1012 }
1013 return (0);
1014}
1015
1016static int
1017fd_attach(device_t dev)
1018{
1019 struct fd_data *fd;
1020#if 0
1021 int i;
1022 int mynor;
1023 int typemynor;
1024 int typesize;
1025#endif
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1026
1027 fd = device_get_softc(dev);
1028
e4c9c0c8 1029 cdevsw_add(&fd_cdevsw, -1 << 6, fd->fdu << 6);
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1030 make_dev(&fd_cdevsw, (fd->fdu << 6),
1031 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu);
1032
1033#if 0
1034 /* Other make_dev() go here. */
1035#endif
1036
1037 /*
1038 * Export the drive to the devstat interface.
1039 */
1040 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1041 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1042 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1043 DEVSTAT_PRIORITY_FD);
1044 return (0);
1045}
1046
1047static int
1048fd_detach(device_t dev)
1049{
1050 struct fd_data *fd;
1051
1052 fd = device_get_softc(dev);
e8b273ff 1053 callout_stop(&fd->toffhandle);
4fc46503 1054 callout_stop(&fd->motor);
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MD
1055
1056 return (0);
1057}
1058
1059static device_method_t fd_methods[] = {
1060 /* Device interface */
1061 DEVMETHOD(device_probe, fd_probe),
1062 DEVMETHOD(device_attach, fd_attach),
1063 DEVMETHOD(device_detach, fd_detach),
1064 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1065 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1066 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1067
1068 { 0, 0 }
1069};
1070
1071static driver_t fd_driver = {
1072 "fd",
1073 fd_methods,
1074 sizeof(struct fd_data)
1075};
1076
1077DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1078
1079/****************************************************************************/
1080/* motor control stuff */
1081/* remember to not deselect the drive we're working on */
1082/****************************************************************************/
1083static void
1084set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1085{
1086 int fdout = fdc->fdout;
1087 int needspecify = 0;
1088
1089 if(turnon) {
1090 fdout &= ~FDO_FDSEL;
1091 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1092 } else
1093 fdout &= ~(FDO_MOEN0 << fdsu);
1094
1095 if(!turnon
1096 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1097 /* gonna turn off the last drive, put FDC to bed */
1098 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1099 else {
1100 /* make sure controller is selected and specified */
1101 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1102 needspecify = 1;
1103 fdout |= (FDO_FRST|FDO_FDMAEN);
1104 }
1105
1106 fdout_wr(fdc, fdout);
1107 fdc->fdout = fdout;
1108 TRACE1("[0x%x->FDOUT]", fdout);
1109
1110 if (needspecify) {
1111 /*
1112 * XXX
1113 * special case: since we have just woken up the FDC
1114 * from its sleep, we silently assume the command will
1115 * be accepted, and do not test for a timeout
1116 */
1117 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1118 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1119 0);
1120 if (fdc->flags & FDC_HAS_FIFO)
1121 (void) enable_fifo(fdc);
1122 }
1123}
1124
1125static void
1126fd_turnoff(void *xfd)
1127{
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MD
1128 fd_p fd = xfd;
1129
1130 TRACE1("[fd%d: turnoff]", fd->fdu);
1131
fbe276c7 1132 crit_enter();
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MD
1133 /*
1134 * Don't turn off the motor yet if the drive is active.
1135 *
1136 * If we got here, this could only mean we missed an interrupt.
1137 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1138 * after a controller reset. Just schedule a pseudo-interrupt
1139 * so the state machine gets re-entered.
1140 */
1141 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1142 fdc_intr(fd->fdc);
fbe276c7 1143 crit_exit();
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1144 return;
1145 }
1146
1147 fd->flags &= ~FD_MOTOR;
1148 set_motor(fd->fdc, fd->fdsu, TURNOFF);
fbe276c7 1149 crit_exit();
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MD
1150}
1151
1152static void
1153fd_motor_on(void *xfd)
1154{
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MD
1155 fd_p fd = xfd;
1156
fbe276c7 1157 crit_enter();
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1158 fd->flags &= ~FD_MOTOR_WAIT;
1159 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1160 {
1161 fdc_intr(fd->fdc);
1162 }
fbe276c7 1163 crit_exit();
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1164}
1165
1166static void
1167fd_turnon(fd_p fd)
1168{
1169 if(!(fd->flags & FD_MOTOR))
1170 {
1171 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1172 set_motor(fd->fdc, fd->fdsu, TURNON);
4fc46503 1173 callout_reset(&fd->motor, hz, fd_motor_on, fd);
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1174 }
1175}
1176
1177static void
1178fdc_reset(fdc_p fdc)
1179{
1180 /* Try a reset, keep motor on */
1181 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1182 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1183 DELAY(100);
1184 /* enable FDC, but defer interrupts a moment */
1185 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1186 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1187 DELAY(100);
1188 fdout_wr(fdc, fdc->fdout);
1189 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1190
1191 /* XXX after a reset, silently believe the FDC will accept commands */
1192 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1193 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1194 0);
1195 if (fdc->flags & FDC_HAS_FIFO)
1196 (void) enable_fifo(fdc);
1197}
1198
1199/****************************************************************************/
1200/* fdc in/out */
1201/****************************************************************************/
1202/*
1203 * FDC IO functions, take care of the main status register, timeout
1204 * in case the desired status bits are never set.
1205 *
1206 * These PIO loops initially start out with short delays between
1207 * each iteration in the expectation that the required condition
1208 * is usually met quickly, so it can be handled immediately. After
1209 * about 1 ms, stepping is increased to achieve a better timing
1210 * accuracy in the calls to DELAY().
1211 */
1212static int
1213fd_in(struct fdc_data *fdc, int *ptr)
1214{
1215 int i, j, step;
1216
1217 for (j = 0, step = 1;
1218 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1219 j < FDSTS_TIMEOUT;
1220 j += step) {
1221 if (i == NE7_RQM)
1222 return (fdc_err(fdc, "ready for output in input\n"));
1223 if (j == 1000)
1224 step = 1000;
1225 DELAY(step);
1226 }
1227 if (j >= FDSTS_TIMEOUT)
1228 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1229#ifdef FDC_DEBUG
1230 i = fddata_rd(fdc);
1231 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1232 *ptr = i;
1233 return (0);
1234#else /* !FDC_DEBUG */
1235 i = fddata_rd(fdc);
1236 if (ptr)
1237 *ptr = i;
1238 return (0);
1239#endif /* FDC_DEBUG */
1240}
1241
1242static int
1243out_fdc(struct fdc_data *fdc, int x)
1244{
1245 int i, j, step;
1246
1247 for (j = 0, step = 1;
1248 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1249 j < FDSTS_TIMEOUT;
1250 j += step) {
1251 if (i == (NE7_DIO|NE7_RQM))
1252 return (fdc_err(fdc, "ready for input in output\n"));
1253 if (j == 1000)
1254 step = 1000;
1255 DELAY(step);
1256 }
1257 if (j >= FDSTS_TIMEOUT)
1258 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1259
1260 /* Send the command and return */
1261 fddata_wr(fdc, x);
1262 TRACE1("[0x%x->FDDATA]", x);
1263 return (0);
1264}
1265
1266/****************************************************************************/
1267/* fdopen/fdclose */
1268/****************************************************************************/
1269int
41c20dac 1270Fdopen(dev_t dev, int flags, int mode, struct thread *td)
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1271{
1272 fdu_t fdu = FDUNIT(minor(dev));
1273 int type = FDTYPE(minor(dev));
1274 fd_p fd;
1275 fdc_p fdc;
1276
1277 /* check bounds */
1278 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1279 return (ENXIO);
1280 fdc = fd->fdc;
1281 if ((fdc == NULL) || (fd->type == NO_TYPE))
1282 return (ENXIO);
1283 if (type > NUMDENS)
1284 return (ENXIO);
1285 if (type == 0)
1286 type = fd->type;
1287 else {
1288 /*
1289 * For each type of basic drive, make sure we are trying
1290 * to open a type it can do,
1291 */
1292 if (type != fd->type) {
1293 switch (fd->type) {
1294 case FD_360:
1295 return (ENXIO);
1296 case FD_720:
1297 if ( type != FD_820
1298 && type != FD_800
1299 && type != FD_640
1300 )
1301 return (ENXIO);
1302 break;
1303 case FD_1200:
1304 switch (type) {
1305 case FD_1480:
1306 type = FD_1480in5_25;
1307 break;
1308 case FD_1440:
1309 type = FD_1440in5_25;
1310 break;
1311 case FD_1232:
1312 break;
1313 case FD_820:
1314 type = FD_820in5_25;
1315 break;
1316 case FD_800:
1317 type = FD_800in5_25;
1318 break;
1319 case FD_720:
1320 type = FD_720in5_25;
1321 break;
1322 case FD_640:
1323 type = FD_640in5_25;
1324 break;
1325 case FD_360:
1326 type = FD_360in5_25;
1327 break;
1328 default:
1329 return(ENXIO);
1330 }
1331 break;
1332 case FD_1440:
1333 if ( type != FD_1720
1334 && type != FD_1480
1335 && type != FD_1200
1336 && type != FD_820
1337 && type != FD_800
1338 && type != FD_720
1339 && type != FD_640
1340 )
1341 return(ENXIO);
1342 break;
1343 }
1344 }
1345 }
1346 fd->ft = fd_types + type - 1;
1347 fd->flags |= FD_OPEN;
1348 /*
1349 * Clearing the DMA overrun counter at open time is a bit messy.
1350 * Since we're only managing one counter per controller, opening
1351 * the second drive could mess it up. Anyway, if the DMA overrun
1352 * condition is really persistent, it will eventually time out
1353 * still. OTOH, clearing it here will ensure we'll at least start
1354 * trying again after a previous (maybe even long ago) failure.
1355 * Also, this is merely a stop-gap measure only that should not
1356 * happen during normal operation, so we can tolerate it to be a
1357 * bit sloppy about this.
1358 */
1359 fdc->dma_overruns = 0;
1360
1361 return 0;
1362}
1363
1364int
41c20dac 1365fdclose(dev_t dev, int flags, int mode, struct thread *td)
984263bc
MD
1366{
1367 fdu_t fdu = FDUNIT(minor(dev));
1368 struct fd_data *fd;
1369
1370 fd = devclass_get_softc(fd_devclass, fdu);
1371 fd->flags &= ~FD_OPEN;
1372 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1373
1374 return (0);
1375}
1376
1377/****************************************************************************/
1378/* fdstrategy */
1379/****************************************************************************/
1380void
81b5c339 1381fdstrategy(dev_t dev, struct bio *bio)
984263bc 1382{
81b5c339 1383 struct buf *bp = bio->bio_buf;
984263bc 1384 unsigned nblocks, blknum, cando;
984263bc
MD
1385 fdu_t fdu;
1386 fdc_p fdc;
1387 fd_p fd;
1388 size_t fdblk;
1389
81b5c339 1390 fdu = FDUNIT(minor(dev));
984263bc
MD
1391 fd = devclass_get_softc(fd_devclass, fdu);
1392 if (fd == 0)
1393 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
81b5c339 1394 (u_long)major(dev), (u_long)minor(dev));
984263bc
MD
1395 fdc = fd->fdc;
1396 if (fd->type == NO_TYPE) {
1397 bp->b_error = ENXIO;
1398 bp->b_flags |= B_ERROR;
1399 goto bad;
1400 };
1401
1402 fdblk = 128 << (fd->ft->secsize);
10f3fee5 1403 if (bp->b_cmd != BUF_CMD_FORMAT) {
54078292 1404 if (bio->bio_offset < 0) {
984263bc 1405 printf(
54078292
MD
1406 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n",
1407 fdu, bio->bio_offset, bp->b_bcount);
984263bc
MD
1408 bp->b_error = EINVAL;
1409 bp->b_flags |= B_ERROR;
1410 goto bad;
1411 }
1412 if ((bp->b_bcount % fdblk) != 0) {
1413 bp->b_error = EINVAL;
1414 bp->b_flags |= B_ERROR;
1415 goto bad;
1416 }
1417 }
1418
1419 /*
1420 * Set up block calculations.
1421 */
54078292 1422 if (bio->bio_offset > 20000000LL * fdblk) {
984263bc
MD
1423 /*
1424 * Reject unreasonably high block number, prevent the
1425 * multiplication below from overflowing.
1426 */
1427 bp->b_error = EINVAL;
1428 bp->b_flags |= B_ERROR;
1429 goto bad;
1430 }
54078292 1431 blknum = (unsigned)(bio->bio_offset / fdblk);
984263bc
MD
1432 nblocks = fd->ft->size;
1433 bp->b_resid = 0;
1434 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1435 if (blknum <= nblocks) {
1436 cando = (nblocks - blknum) * fdblk;
1437 bp->b_resid = bp->b_bcount - cando;
1438 if (cando == 0)
1439 goto bad; /* not actually bad but EOF */
1440 } else {
1441 bp->b_error = EINVAL;
1442 bp->b_flags |= B_ERROR;
1443 goto bad;
1444 }
1445 }
fbe276c7 1446 crit_enter();
81b5c339
MD
1447 bio->bio_driver_info = dev;
1448 bioqdisksort(&fdc->bio_queue, bio);
e8b273ff 1449 callout_stop(&fd->toffhandle);
984263bc
MD
1450
1451 /* Tell devstat we are starting on the transaction */
1452 devstat_start_transaction(&fd->device_stats);
1453 device_busy(fd->dev);
1454
1455 fdstart(fdc);
fbe276c7 1456 crit_exit();
984263bc
MD
1457 return;
1458
1459bad:
81b5c339 1460 biodone(bio);
984263bc
MD
1461}
1462
1463/***************************************************************\
1464* fdstart *
1465* We have just queued something.. if the controller is not busy *
1466* then simulate the case where it has just finished a command *
1467* So that it (the interrupt routine) looks on the queue for more*
1468* work to do and picks up what we just added. *
1469* If the controller is already busy, we need do nothing, as it *
1470* will pick up our work when the present work completes *
1471\***************************************************************/
1472static void
1473fdstart(struct fdc_data *fdc)
1474{
fbe276c7 1475 crit_enter();
984263bc
MD
1476 if(fdc->state == DEVIDLE)
1477 {
1478 fdc_intr(fdc);
1479 }
fbe276c7 1480 crit_exit();
984263bc
MD
1481}
1482
1483static void
1484fd_iotimeout(void *xfdc)
1485{
1486 fdc_p fdc;
984263bc
MD
1487
1488 fdc = xfdc;
1489 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1490
1491 /*
1492 * Due to IBM's brain-dead design, the FDC has a faked ready
1493 * signal, hardwired to ready == true. Thus, any command
1494 * issued if there's no diskette in the drive will _never_
1495 * complete, and must be aborted by resetting the FDC.
1496 * Many thanks, Big Blue!
1497 * The FDC must not be reset directly, since that would
1498 * interfere with the state machine. Instead, pretend that
1499 * the command completed but was invalid. The state machine
1500 * will reset the FDC and retry once.
1501 */
fbe276c7 1502 crit_enter();
984263bc
MD
1503 fdc->status[0] = NE7_ST0_IC_IV;
1504 fdc->flags &= ~FDC_STAT_VALID;
1505 fdc->state = IOTIMEDOUT;
1506 fdc_intr(fdc);
fbe276c7 1507 crit_exit();
984263bc
MD
1508}
1509
fbe276c7 1510/* just ensure it is running in a critical section */
984263bc
MD
1511static void
1512fd_pseudointr(void *xfdc)
1513{
fbe276c7 1514 crit_enter();
984263bc 1515 fdc_intr(xfdc);
fbe276c7 1516 crit_exit();
984263bc
MD
1517}
1518
1519/***********************************************************************\
1520* fdintr *
1521* keep calling the state machine until it returns a 0 *
1522* ALWAYS called at SPLBIO *
1523\***********************************************************************/
1524static void
1525fdc_intr(void *xfdc)
1526{
1527 fdc_p fdc = xfdc;
1528 while(fdstate(fdc))
1529 ;
1530}
1531
1532/*
1533 * magic pseudo-DMA initialization for YE FDC. Sets count and
1534 * direction
1535 */
1536#define SET_BCDR(fdc,wr,cnt,port) \
1537 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1538 ((cnt)-1) & 0xff); \
1539 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1540 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1541
1542/*
1543 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1544 */
10f3fee5 1545static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
984263bc
MD
1546{
1547 u_char *cptr = (u_char *)addr;
1548
10f3fee5 1549 if (cmd == BUF_CMD_READ) {
984263bc
MD
1550 if (fdc->state != PIOREAD) {
1551 fdc->state = PIOREAD;
1552 return(0);
1553 };
1554 SET_BCDR(fdc, 0, count, 0);
1555 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1556 FDC_YE_DATAPORT, cptr, count);
1557 } else {
1558 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1559 FDC_YE_DATAPORT, cptr, count);
1560 SET_BCDR(fdc, 0, count, 0);
1561 };
1562 return(1);
1563}
1564
1565/***********************************************************************\
1566* The controller state machine. *
1567* if it returns a non zero value, it should be called again immediatly *
1568\***********************************************************************/
1569static int
1570fdstate(fdc_p fdc)
1571{
1572 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1573 unsigned blknum = 0, b_cylinder = 0;
1574 fdu_t fdu = fdc->fdu;
1575 fd_p fd;
81b5c339 1576 struct bio *bio;
3a1b0fdc 1577 struct buf *bp;
984263bc
MD
1578 struct fd_formb *finfo = NULL;
1579 size_t fdblk;
81b5c339
MD
1580 dev_t dev;
1581
1582 bio = fdc->bio;
1583 if (bio == NULL) {
1584 bio = bioq_first(&fdc->bio_queue);
1585 if (bio != NULL) {
1586 bioq_remove(&fdc->bio_queue, bio);
1587 fdc->bio = bio;
984263bc
MD
1588 }
1589 }
81b5c339 1590 if (bio == NULL) {
984263bc
MD
1591 /***********************************************\
1592 * nothing left for this controller to do *
1593 * Force into the IDLE state, *
1594 \***********************************************/
1595 fdc->state = DEVIDLE;
1596 if (fdc->fd) {
1597 device_printf(fdc->fdc_dev,
1598 "unexpected valid fd pointer\n");
1599 fdc->fd = (fd_p) 0;
1600 fdc->fdu = -1;
1601 }
1602 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1603 return (0);
1604 }
81b5c339
MD
1605 bp = bio->bio_buf;
1606 dev = bio->bio_driver_info;
1607
1608 fdu = FDUNIT(minor(dev));
984263bc
MD
1609 fd = devclass_get_softc(fd_devclass, fdu);
1610 fdblk = 128 << fd->ft->secsize;
1611 if (fdc->fd && (fd != fdc->fd))
1612 device_printf(fd->dev, "confused fd pointers\n");
10f3fee5
MD
1613 read = (bp->b_cmd == BUF_CMD_READ);
1614 format = (bp->b_cmd == BUF_CMD_FORMAT);
984263bc
MD
1615 if (format) {
1616 finfo = (struct fd_formb *)bp->b_data;
1617 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1618 - (char *)finfo;
1619 }
1620 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
54078292
MD
1621 blknum = (unsigned)(bio->bio_offset / fdblk) +
1622 fd->skip /fdblk;
984263bc
MD
1623 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1624 }
1625 TRACE1("fd%d", fdu);
1626 TRACE1("[%s]", fdstates[fdc->state]);
1627 TRACE1("(0x%x)", fd->flags);
e8b273ff 1628 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
984263bc
MD
1629 switch (fdc->state)
1630 {
1631 case DEVIDLE:
1632 case FINDWORK: /* we have found new work */
1633 fdc->retry = 0;
1634 fd->skip = 0;
1635 fdc->fd = fd;
1636 fdc->fdu = fdu;
1637 fdc->fdctl_wr(fdc, fd->ft->trans);
1638 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1639 /*******************************************************\
1640 * If the next drive has a motor startup pending, then *
1641 * it will start up in its own good time *
1642 \*******************************************************/
1643 if(fd->flags & FD_MOTOR_WAIT) {
1644 fdc->state = MOTORWAIT;
1645 return (0); /* come back later */
1646 }
1647 /*******************************************************\
1648 * Maybe if it's not starting, it SHOULD be starting *
1649 \*******************************************************/
1650 if (!(fd->flags & FD_MOTOR))
1651 {
1652 fdc->state = MOTORWAIT;
1653 fd_turnon(fd);
1654 return (0);
1655 }
1656 else /* at least make sure we are selected */
1657 {
1658 set_motor(fdc, fd->fdsu, TURNON);
1659 }
1660 if (fdc->flags & FDC_NEEDS_RESET) {
1661 fdc->state = RESETCTLR;
1662 fdc->flags &= ~FDC_NEEDS_RESET;
1663 } else
1664 fdc->state = DOSEEK;
1665 break;
1666 case DOSEEK:
1667 if (b_cylinder == (unsigned)fd->track)
1668 {
1669 fdc->state = SEEKCOMPLETE;
1670 break;
1671 }
1672 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1673 fd->fdsu, b_cylinder * fd->ft->steptrac,
1674 0))
1675 {
1676 /*
1677 * seek command not accepted, looks like
1678 * the FDC went off to the Saints...
1679 */
1680 fdc->retry = 6; /* try a reset */
1681 return(retrier(fdc));
1682 }
1683 fd->track = FD_NO_TRACK;
1684 fdc->state = SEEKWAIT;
1685 return(0); /* will return later */
1686 case SEEKWAIT:
1687 /* allow heads to settle */
4fc46503
JS
1688 callout_reset(&fdc->pseudointr_ch, hz / 16,
1689 fd_pseudointr, fdc);
984263bc
MD
1690 fdc->state = SEEKCOMPLETE;
1691 return(0); /* will return later */
1692 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1693 /* Make sure seek really happened*/
1694 if(fd->track == FD_NO_TRACK) {
1695 int descyl = b_cylinder * fd->ft->steptrac;
1696 do {
1697 /*
1698 * This might be a "ready changed" interrupt,
1699 * which cannot really happen since the
1700 * RDY pin is hardwired to + 5 volts. This
1701 * generally indicates a "bouncing" intr
1702 * line, so do one of the following:
1703 *
1704 * When running on an enhanced FDC that is
1705 * known to not go stuck after responding
1706 * with INVALID, fetch all interrupt states
1707 * until seeing either an INVALID or a
1708 * real interrupt condition.
1709 *
1710 * When running on a dumb old NE765, give
1711 * up immediately. The controller will
1712 * provide up to four dummy RC interrupt
1713 * conditions right after reset (for the
1714 * corresponding four drives), so this is
1715 * our only chance to get notice that it
1716 * was not the FDC that caused the interrupt.
1717 */
1718 if (fd_sense_int(fdc, &st0, &cyl)
1719 == FD_NOT_VALID)
1720 return 0;
1721 if(fdc->fdct == FDC_NE765
1722 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1723 return 0; /* hope for a real intr */
1724 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1725
1726 if (0 == descyl) {
1727 int failed = 0;
1728 /*
1729 * seek to cyl 0 requested; make sure we are
1730 * really there
1731 */
1732 if (fd_sense_drive_status(fdc, &st3))
1733 failed = 1;
1734 if ((st3 & NE7_ST3_T0) == 0) {
1735 printf(
1736 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1737 fdu, st3, NE7_ST3BITS);
1738 failed = 1;
1739 }
1740
1741 if (failed) {
1742 if(fdc->retry < 3)
1743 fdc->retry = 3;
1744 return (retrier(fdc));
1745 }
1746 }
1747
1748 if (cyl != descyl) {
1749 printf(
1750 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1751 fdu, descyl, cyl, st0);
1752 if (fdc->retry < 3)
1753 fdc->retry = 3;
1754 return (retrier(fdc));
1755 }
1756 }
1757
1758 fd->track = b_cylinder;
10f3fee5
MD
1759 if (!(fdc->flags & FDC_NODMA)) {
1760 isa_dmastart(isa_dmabp(bp),
1761 bp->b_data+fd->skip,
984263bc 1762 format ? bp->b_bcount : fdblk, fdc->dmachan);
10f3fee5 1763 }
984263bc
MD
1764 sectrac = fd->ft->sectrac;
1765 sec = blknum % (sectrac * fd->ft->heads);
1766 head = sec / sectrac;
1767 sec = sec % sectrac + 1;
1768 fd->hddrv = ((head&1)<<2)+fdu;
1769
1770 if(format || !read)
1771 {
1772 /* make sure the drive is writable */
1773 if(fd_sense_drive_status(fdc, &st3) != 0)
1774 {
1775 /* stuck controller? */
1776 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1777 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1778 bp->b_data + fd->skip,
1779 format ? bp->b_bcount : fdblk,
1780 fdc->dmachan);
1781 fdc->retry = 6; /* reset the beast */
1782 return (retrier(fdc));
1783 }
1784 if(st3 & NE7_ST3_WP)
1785 {
1786 /*
1787 * XXX YES! this is ugly.
1788 * in order to force the current operation
1789 * to fail, we will have to fake an FDC
1790 * error - all error handling is done
1791 * by the retrier()
1792 */
1793 fdc->status[0] = NE7_ST0_IC_AT;
1794 fdc->status[1] = NE7_ST1_NW;
1795 fdc->status[2] = 0;
1796 fdc->status[3] = fd->track;
1797 fdc->status[4] = head;
1798 fdc->status[5] = sec;
1799 fdc->retry = 8; /* break out immediately */
1800 fdc->state = IOTIMEDOUT; /* not really... */
1801 return (1);
1802 }
1803 }
1804
1805 if (format) {
1806 if (fdc->flags & FDC_NODMA) {
1807 /*
1808 * This seems to be necessary for
1809 * whatever obscure reason; if we omit
1810 * it, we end up filling the sector ID
1811 * fields of the newly formatted track
1812 * entirely with garbage, causing
1813 * `wrong cylinder' errors all over
1814 * the place when trying to read them
1815 * back.
1816 *
1817 * Umpf.
1818 */
1819 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1820
10f3fee5 1821 (void)fdcpio(fdc,bp->b_cmd,
984263bc
MD
1822 bp->b_data+fd->skip,
1823 bp->b_bcount);
1824
1825 }
1826 /* formatting */
1827 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1828 finfo->fd_formb_secshift,
1829 finfo->fd_formb_nsecs,
1830 finfo->fd_formb_gaplen,
1831 finfo->fd_formb_fillbyte, 0)) {
1832 /* controller fell over */
1833 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1834 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1835 bp->b_data + fd->skip,
1836 format ? bp->b_bcount : fdblk,
1837 fdc->dmachan);
1838 fdc->retry = 6;
1839 return (retrier(fdc));
1840 }
1841 } else {
1842 if (fdc->flags & FDC_NODMA) {
1843 /*
1844 * this seems to be necessary even when
1845 * reading data
1846 */
1847 SET_BCDR(fdc, 1, fdblk, 0);
1848
1849 /*
1850 * perform the write pseudo-DMA before
1851 * the WRITE command is sent
1852 */
1853 if (!read)
10f3fee5 1854 (void)fdcpio(fdc,bp->b_cmd,
984263bc
MD
1855 bp->b_data+fd->skip,
1856 fdblk);
1857 }
1858 if (fd_cmd(fdc, 9,
1859 (read ? NE7CMD_READ : NE7CMD_WRITE),
1860 head << 2 | fdu, /* head & unit */
1861 fd->track, /* track */
1862 head,
1863 sec, /* sector + 1 */
1864 fd->ft->secsize, /* sector size */
1865 sectrac, /* sectors/track */
1866 fd->ft->gap, /* gap size */
1867 fd->ft->datalen, /* data length */
1868 0)) {
1869 /* the beast is sleeping again */
1870 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1871 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1872 bp->b_data + fd->skip,
1873 format ? bp->b_bcount : fdblk,
1874 fdc->dmachan);
1875 fdc->retry = 6;
1876 return (retrier(fdc));
1877 }
1878 }
1879 if (fdc->flags & FDC_NODMA)
1880 /*
1881 * if this is a read, then simply await interrupt
1882 * before performing PIO
1883 */
10f3fee5 1884 if (read && !fdcpio(fdc,bp->b_cmd,
984263bc 1885 bp->b_data+fd->skip,fdblk)) {
e8b273ff
MD
1886 callout_reset(&fd->tohandle, hz,
1887 fd_iotimeout, fdc);
984263bc
MD
1888 return(0); /* will return later */
1889 };
1890
1891 /*
1892 * write (or format) operation will fall through and
1893 * await completion interrupt
1894 */
1895 fdc->state = IOCOMPLETE;
e8b273ff 1896 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
984263bc
MD
1897 return (0); /* will return later */
1898 case PIOREAD:
1899 /*
1900 * actually perform the PIO read. The IOCOMPLETE case
1901 * removes the timeout for us.
1902 */
10f3fee5 1903 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
984263bc
MD
1904 fdc->state = IOCOMPLETE;
1905 /* FALLTHROUGH */
1906 case IOCOMPLETE: /* IO DONE, post-analyze */
e8b273ff 1907 callout_stop(&fd->tohandle);
984263bc
MD
1908
1909 if (fd_read_status(fdc, fd->fdsu)) {
10f3fee5
MD
1910 if (!(fdc->flags & FDC_NODMA)) {
1911 isa_dmadone(isa_dmabp(bp),
1912 bp->b_data + fd->skip,
984263bc
MD
1913 format ? bp->b_bcount : fdblk,
1914 fdc->dmachan);
10f3fee5 1915 }
984263bc
MD
1916 if (fdc->retry < 6)
1917 fdc->retry = 6; /* force a reset */
1918 return (retrier(fdc));
1919 }
1920
1921 fdc->state = IOTIMEDOUT;
1922
1923 /* FALLTHROUGH */
1924
1925 case IOTIMEDOUT:
10f3fee5
MD
1926 if (!(fdc->flags & FDC_NODMA)) {
1927 isa_dmadone(isa_dmabp(bp),
1928 bp->b_data + fd->skip,
984263bc 1929 format ? bp->b_bcount : fdblk, fdc->dmachan);
10f3fee5 1930 }
984263bc
MD
1931 if (fdc->status[0] & NE7_ST0_IC) {
1932 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1933 && fdc->status[1] & NE7_ST1_OR) {
1934 /*
1935 * DMA overrun. Someone hogged the bus and
1936 * didn't release it in time for the next
1937 * FDC transfer.
1938 *
1939 * We normally restart this without bumping
1940 * the retry counter. However, in case
1941 * something is seriously messed up (like
1942 * broken hardware), we rather limit the
1943 * number of retries so the IO operation
1944 * doesn't block indefinately.
1945 */
1946 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
1947 fdc->state = SEEKCOMPLETE;
1948 return (1);
1949 } /* else fall through */
1950 }
1951 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
1952 && fdc->retry < 6)
1953 fdc->retry = 6; /* force a reset */
1954 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1955 && fdc->status[2] & NE7_ST2_WC
1956 && fdc->retry < 3)
1957 fdc->retry = 3; /* force recalibrate */
1958 return (retrier(fdc));
1959 }
1960 /* All OK */
1961 /* Operation successful, retry DMA overruns again next time. */
1962 fdc->dma_overruns = 0;
1963 fd->skip += fdblk;
1964 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
1965 /* set up next transfer */
1966 fdc->state = DOSEEK;
1967 } else {
1968 /* ALL DONE */
1969 fd->skip = 0;
81b5c339 1970 fdc->bio = NULL;
984263bc
MD
1971 device_unbusy(fd->dev);
1972 devstat_end_transaction_buf(&fd->device_stats, bp);
81b5c339 1973 biodone(bio);
984263bc
MD
1974 fdc->fd = (fd_p) 0;
1975 fdc->fdu = -1;
1976 fdc->state = FINDWORK;
1977 }
1978 return (1);
1979 case RESETCTLR:
1980 fdc_reset(fdc);
1981 fdc->retry++;
1982 fdc->state = RESETCOMPLETE;
1983 return (0);
1984 case RESETCOMPLETE:
1985 /*
1986 * Discard all the results from the reset so that they
1987 * can't cause an unexpected interrupt later.
1988 */
1989 for (i = 0; i < 4; i++)
1990 (void)fd_sense_int(fdc, &st0, &cyl);
1991 fdc->state = STARTRECAL;
1992 /* Fall through. */
1993 case STARTRECAL:
1994 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
1995 /* arrgl */
1996 fdc->retry = 6;
1997 return (retrier(fdc));
1998 }
1999 fdc->state = RECALWAIT;
2000 return (0); /* will return later */
2001 case RECALWAIT:
2002 /* allow heads to settle */
4fc46503 2003 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
984263bc
MD
2004 fdc->state = RECALCOMPLETE;
2005 return (0); /* will return later */
2006 case RECALCOMPLETE:
2007 do {
2008 /*
2009 * See SEEKCOMPLETE for a comment on this:
2010 */
2011 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2012 return 0;
2013 if(fdc->fdct == FDC_NE765
2014 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2015 return 0; /* hope for a real intr */
2016 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2017 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2018 {
2019 if(fdc->retry > 3)
2020 /*
2021 * a recalibrate from beyond cylinder 77
2022 * will "fail" due to the FDC limitations;
2023 * since people used to complain much about
2024 * the failure message, try not logging
2025 * this one if it seems to be the first
2026 * time in a line
2027 */
2028 printf("fd%d: recal failed ST0 %b cyl %d\n",
2029 fdu, st0, NE7_ST0BITS, cyl);
2030 if(fdc->retry < 3) fdc->retry = 3;
2031 return (retrier(fdc));
2032 }
2033 fd->track = 0;
2034 /* Seek (probably) necessary */
2035 fdc->state = DOSEEK;
2036 return (1); /* will return immediatly */
2037 case MOTORWAIT:
2038 if(fd->flags & FD_MOTOR_WAIT)
2039 {
2040 return (0); /* time's not up yet */
2041 }
2042 if (fdc->flags & FDC_NEEDS_RESET) {
2043 fdc->state = RESETCTLR;
2044 fdc->flags &= ~FDC_NEEDS_RESET;
2045 } else {
2046 /*
2047 * If all motors were off, then the controller was
2048 * reset, so it has lost track of the current
2049 * cylinder. Recalibrate to handle this case.
2050 * But first, discard the results of the reset.
2051 */
2052 fdc->state = RESETCOMPLETE;
2053 }
2054 return (1); /* will return immediatly */
2055 default:
2056 device_printf(fdc->fdc_dev, "unexpected FD int->");
2057 if (fd_read_status(fdc, fd->fdsu) == 0)
2058 printf("FDC status :%x %x %x %x %x %x %x ",
2059 fdc->status[0],
2060 fdc->status[1],
2061 fdc->status[2],
2062 fdc->status[3],
2063 fdc->status[4],
2064 fdc->status[5],
2065 fdc->status[6] );
2066 else
2067 printf("No status available ");
2068 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2069 {
2070 printf("[controller is dead now]\n");
2071 return (0);
2072 }
2073 printf("ST0 = %x, PCN = %x\n", st0, cyl);
2074 return (0);
2075 }
2076 /*XXX confusing: some branches return immediately, others end up here*/
2077 return (1); /* Come back immediatly to new state */
2078}
2079
2080static int
2081retrier(struct fdc_data *fdc)
2082{
81b5c339 2083 struct bio *bio;
3a1b0fdc 2084 struct buf *bp;
984263bc 2085 struct fd_data *fd;
81b5c339 2086 dev_t dev;
984263bc
MD
2087 int fdu;
2088
81b5c339
MD
2089 bio = fdc->bio;
2090 bp = bio->bio_buf;
2091 dev = bio->bio_driver_info;
984263bc
MD
2092
2093 /* XXX shouldn't this be cached somewhere? */
81b5c339 2094 fdu = FDUNIT(minor(dev));
984263bc
MD
2095 fd = devclass_get_softc(fd_devclass, fdu);
2096 if (fd->options & FDOPT_NORETRY)
2097 goto fail;
2098
2099 switch (fdc->retry) {
2100 case 0: case 1: case 2:
2101 fdc->state = SEEKCOMPLETE;
2102 break;
2103 case 3: case 4: case 5:
2104 fdc->state = STARTRECAL;
2105 break;
2106 case 6:
2107 fdc->state = RESETCTLR;
2108 break;
2109 case 7:
2110 break;
2111 default:
2112 fail:
2113 {
2114 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
984263bc 2115
e4c9c0c8 2116 if (printerror) {
ee3ad2c9
MD
2117 /*
2118 * note: use the correct device for more
2119 * verbose error reporting.
2120 */
2121 dev_t subdev;
2122
81b5c339
MD
2123 subdev = make_sub_dev(dev,
2124 (FDUNIT(minor(dev))<<3)|RAW_PART);
2125 diskerr(bio, subdev,
ee3ad2c9 2126 "hard error", LOG_PRINTF,
54078292 2127 fdc->fd->skip, NULL);
e4c9c0c8 2128 }
984263bc
MD
2129 if (printerror) {
2130 if (fdc->flags & FDC_STAT_VALID)
2131 printf(
2132 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2133 fdc->status[0], NE7_ST0BITS,
2134 fdc->status[1], NE7_ST1BITS,
2135 fdc->status[2], NE7_ST2BITS,
2136 fdc->status[3], fdc->status[4],
2137 fdc->status[5]);
2138 else
2139 printf(" (No status)\n");
2140 }
2141 }
2142 bp->b_flags |= B_ERROR;
2143 bp->b_error = EIO;
2144 bp->b_resid += bp->b_bcount - fdc->fd->skip;
81b5c339 2145 fdc->bio = NULL;
984263bc
MD
2146 fdc->fd->skip = 0;
2147 device_unbusy(fd->dev);
2148 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
81b5c339 2149 biodone(bio);
984263bc
MD
2150 fdc->state = FINDWORK;
2151 fdc->flags |= FDC_NEEDS_RESET;
2152 fdc->fd = (fd_p) 0;
2153 fdc->fdu = -1;
2154 return (1);
2155 }
2156 fdc->retry++;
2157 return (1);
2158}
2159
014958fd
MD
2160static void
2161fdformat_wakeup(struct bio *bio)
2162{
2163 bio->bio_buf->b_cmd = BUF_CMD_DONE;
2164 wakeup(bio);
2165}
2166
984263bc 2167static int
41c20dac 2168fdformat(dev_t dev, struct fd_formb *finfo, struct thread *td)
984263bc
MD
2169{
2170 fdu_t fdu;
2171 fd_p fd;
984263bc 2172 struct buf *bp;
fbe276c7 2173 int rv = 0;
984263bc
MD
2174 size_t fdblk;
2175
2176 fdu = FDUNIT(minor(dev));
2177 fd = devclass_get_softc(fd_devclass, fdu);
2178 fdblk = 128 << fd->ft->secsize;
2179
2180 /* set up a buffer header for fdstrategy() */
014958fd 2181 bp = getpbuf(NULL);
10f3fee5 2182 bp->b_cmd = BUF_CMD_FORMAT;
984263bc
MD
2183
2184 /*
2185 * calculate a fake blkno, so fdstrategy() would initiate a
2186 * seek to the requested cylinder
2187 */
54078292
MD
2188 bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
2189 (fd->ft->sectrac * fd->ft->heads)
2190 + finfo->head * fd->ft->sectrac) * fdblk;
81b5c339 2191 bp->b_bio1.bio_driver_info = dev;
014958fd 2192 bp->b_bio1.bio_done = fdformat_wakeup;
984263bc
MD
2193
2194 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2195 bp->b_data = (caddr_t)finfo;
2196
2197 /* now do the format */
81b5c339 2198 dev_dstrategy(dev, &bp->b_bio1);
984263bc
MD
2199
2200 /* ...and wait for it to complete */
fbe276c7 2201 crit_enter();
10f3fee5 2202 while (bp->b_cmd != BUF_CMD_DONE) {
014958fd 2203 rv = tsleep(&bp->b_bio1, 0, "fdform", 20 * hz);
984263bc
MD
2204 if (rv == EWOULDBLOCK)
2205 break;
2206 }
fbe276c7 2207 crit_exit();
984263bc
MD
2208
2209 if (rv == EWOULDBLOCK) {
2210 /* timed out */
2211 rv = EIO;
2212 device_unbusy(fd->dev);
81b5c339 2213 biodone(&bp->b_bio1);
984263bc
MD
2214 }
2215 if (bp->b_flags & B_ERROR)
2216 rv = bp->b_error;
2217 /*
2218 * allow the process to be swapped
2219 */
014958fd 2220 relpbuf(bp, NULL);
984263bc
MD
2221 return rv;
2222}
2223
2224/*
2225 * TODO: don't allocate buffer on stack.
2226 */
2227
2228static int
41c20dac 2229fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
984263bc
MD
2230{
2231 fdu_t fdu = FDUNIT(minor(dev));
2232 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2233 size_t fdblk;
2234
2235 struct fd_type *fdt;
2236 struct disklabel *dl;
2237 struct fdc_status *fsp;
2238 char buffer[DEV_BSIZE];
2239 int error = 0;
2240
2241 fdblk = 128 << fd->ft->secsize;
2242
2243 switch (cmd) {
2244 case DIOCGDINFO:
2245 bzero(buffer, sizeof (buffer));
2246 dl = (struct disklabel *)buffer;
2247 dl->d_secsize = fdblk;
2248 fdt = fd->ft;
2249 dl->d_secpercyl = fdt->size / fdt->tracks;
2250 dl->d_type = DTYPE_FLOPPY;
2251
2252 if (readdisklabel(dev, dl)
2253 == NULL)
2254 error = 0;
2255 else
2256 error = EINVAL;
2257
2258 *(struct disklabel *)addr = *dl;
2259 break;
2260
2261 case DIOCSDINFO:
2262 if ((flag & FWRITE) == 0)
2263 error = EBADF;
2264 break;
2265
2266 case DIOCWLABEL:
2267 if ((flag & FWRITE) == 0)
2268 error = EBADF;
2269 break;
2270
2271 case DIOCWDINFO:
2272 if ((flag & FWRITE) == 0) {
2273 error = EBADF;
2274 break;
2275 }
2276
2277 dl = (struct disklabel *)addr;
2278
2279 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2280 (u_long)0)) != 0)
2281 break;
2282
2283 error = writedisklabel(dev, (struct disklabel *)buffer);
2284 break;
2285 case FD_FORM:
2286 if ((flag & FWRITE) == 0)
2287 error = EBADF; /* must be opened for writing */
2288 else if (((struct fd_formb *)addr)->format_version !=
2289 FD_FORMAT_VERSION)
2290 error = EINVAL; /* wrong version of formatting prog */
2291 else
41c20dac 2292 error = fdformat(dev, (struct fd_formb *)addr, td);
984263bc
MD
2293 break;
2294
2295 case FD_GTYPE: /* get drive type */
2296 *(struct fd_type *)addr = *fd->ft;
2297 break;
2298
2299 case FD_STYPE: /* set drive type */
2300 /* this is considered harmful; only allow for superuser */
dadab5e9 2301 if (suser(td) != 0)
984263bc
MD
2302 return EPERM;
2303 *fd->ft = *(struct fd_type *)addr;
2304 break;
2305
2306 case FD_GOPTS: /* get drive options */
2307 *(int *)addr = fd->options;
2308 break;
2309
2310 case FD_SOPTS: /* set drive options */
2311 fd->options = *(int *)addr;
2312 break;
2313
2314 case FD_GSTAT:
2315 fsp = (struct fdc_status *)addr;
2316 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2317 return EINVAL;
2318 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2319 break;
2320
2321 default:
2322 error = ENOTTY;
2323 break;
2324 }
2325 return (error);
2326}
2327
2328/*
2329 * Hello emacs, these are the
2330 * Local Variables:
2331 * c-indent-level: 8
2332 * c-continued-statement-offset: 8
2333 * c-continued-brace-offset: 0
2334 * c-brace-offset: -8
2335 * c-brace-imaginary-offset: 0
2336 * c-argdecl-indent: 8
2337 * c-label-offset: -8
2338 * c++-hanging-braces: 1
2339 * c++-access-specifier-offset: -8
2340 * c++-empty-arglist-indent: 8
2341 * c++-friend-offset: 0
2342 * End:
2343 */