Merge branch 'master' of ssh://crater.dragonflybsd.org/repository/git/dragonfly
[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 $
c755a6ff 54 * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.43 2008/08/13 08:18:09 swildner 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>
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68#include <sys/diskslice.h>
69#include <sys/disk.h>
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70#include <sys/devicestat.h>
71#include <sys/fcntl.h>
72#include <sys/malloc.h>
73#include <sys/module.h>
74#include <sys/proc.h>
895c1f85 75#include <sys/priv.h>
984263bc 76#include <sys/syslog.h>
335dda38 77#include <sys/device.h>
984263bc 78#include <sys/bus.h>
984263bc 79#include <sys/rman.h>
3020e3be 80#include <sys/buf2.h>
fbe276c7 81#include <sys/thread2.h>
3020e3be 82
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83#include <machine/clock.h>
84#include <machine/ioctl_fd.h>
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85#include <machine/stdarg.h>
86
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87#include <bus/isa/isavar.h>
88#include <bus/isa/isareg.h>
89#include "fdreg.h"
90#include "fdc.h"
91#include <bus/isa/rtc.h>
984263bc 92
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93/* configuration flags */
94#define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
95#define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
96
97/* internally used only, not really from CMOS: */
98#define RTCFDT_144M_PRETENDED 0x1000
99
100/* error returns for fd_cmd() */
101#define FD_FAILED -1
102#define FD_NOT_VALID -2
103#define FDC_ERRMAX 100 /* do not log more */
104/*
105 * Stop retrying after this many DMA overruns. Since each retry takes
106 * one revolution, with 300 rpm., 25 retries take approximately 10
107 * seconds which the read attempt will block in case the DMA overrun
108 * is persistent.
109 */
110#define FDC_DMAOV_MAX 25
111
112/*
113 * Timeout value for the PIO loops to wait until the FDC main status
114 * register matches our expectations (request for master, direction
115 * bit). This is supposed to be a number of microseconds, although
116 * timing might actually not be very accurate.
117 *
118 * Timeouts of 100 msec are believed to be required for some broken
119 * (old) hardware.
120 */
121#define FDSTS_TIMEOUT 100000
122
123#define NUMTYPES 17
124#define NUMDENS (NUMTYPES - 7)
125
126/* These defines (-1) must match index for fd_types */
127#define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
128#define NO_TYPE 0 /* must match NO_TYPE in ft.c */
129#define FD_1720 1
130#define FD_1480 2
131#define FD_1440 3
132#define FD_1200 4
133#define FD_820 5
134#define FD_800 6
135#define FD_720 7
136#define FD_360 8
137#define FD_640 9
138#define FD_1232 10
139
140#define FD_1480in5_25 11
141#define FD_1440in5_25 12
142#define FD_820in5_25 13
143#define FD_800in5_25 14
144#define FD_720in5_25 15
145#define FD_360in5_25 16
146#define FD_640in5_25 17
147
148
149static struct fd_type fd_types[NUMTYPES] =
150{
151{ 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
152{ 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
153{ 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
154{ 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
155{ 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
156{ 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
157{ 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
158{ 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
159{ 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
160{ 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
161
162{ 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
163{ 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
164{ 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
165{ 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
166{ 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
167{ 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
168{ 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
169};
170
171#define DRVS_PER_CTLR 2 /* 2 floppies */
172
173/***********************************************************************\
174* Per controller structure. *
175\***********************************************************************/
8c5c0470 176devclass_t fdc_devclass;
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177
178/***********************************************************************\
179* Per drive structure. *
180* N per controller (DRVS_PER_CTLR) *
181\***********************************************************************/
182struct fd_data {
183 struct fdc_data *fdc; /* pointer to controller structure */
184 int fdsu; /* this units number on this controller */
185 int type; /* Drive type (FD_1440...) */
983105c1 186 struct fd_type ft; /* the type descriptor */
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187 int flags;
188#define FD_OPEN 0x01 /* it's open */
189#define FD_ACTIVE 0x02 /* it's active */
190#define FD_MOTOR 0x04 /* motor should be on */
191#define FD_MOTOR_WAIT 0x08 /* motor coming up */
192 int skip;
193 int hddrv;
194#define FD_NO_TRACK -2
195 int track; /* where we think the head is */
196 int options; /* user configurable options, see ioctl_fd.h */
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197 struct callout toffhandle;
198 struct callout tohandle;
4fc46503 199 struct callout motor;
983105c1 200 struct disk disk;
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201 struct devstat device_stats;
202 device_t dev;
203 fdu_t fdu;
204};
205
206struct fdc_ivars {
207 int fdunit;
208};
209static devclass_t fd_devclass;
210
211/***********************************************************************\
212* Throughout this file the following conventions will be used: *
213* fd is a pointer to the fd_data struct for the drive in question *
214* fdc is a pointer to the fdc_data struct for the controller *
215* fdu is the floppy drive unit number *
216* fdcu is the floppy controller unit number *
217* fdsu is the floppy drive unit number on that controller. (sub-unit) *
218\***********************************************************************/
219
220/* internal functions */
221static void fdc_intr(void *);
222static void set_motor(struct fdc_data *, int, int);
223# define TURNON 1
224# define TURNOFF 0
225static timeout_t fd_turnoff;
226static timeout_t fd_motor_on;
227static void fd_turnon(struct fd_data *);
228static void fdc_reset(fdc_p);
229static int fd_in(struct fdc_data *, int *);
230static int out_fdc(struct fdc_data *, int);
231static void fdstart(struct fdc_data *);
232static timeout_t fd_iotimeout;
233static timeout_t fd_pseudointr;
234static int fdstate(struct fdc_data *);
235static int retrier(struct fdc_data *);
b13267a5 236static int fdformat(cdev_t, struct fd_formb *, struct ucred *);
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237
238static int enable_fifo(fdc_p fdc);
239
240static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
241
242
243#define DEVIDLE 0
244#define FINDWORK 1
245#define DOSEEK 2
246#define SEEKCOMPLETE 3
247#define IOCOMPLETE 4
248#define RECALCOMPLETE 5
249#define STARTRECAL 6
250#define RESETCTLR 7
251#define SEEKWAIT 8
252#define RECALWAIT 9
253#define MOTORWAIT 10
254#define IOTIMEDOUT 11
255#define RESETCOMPLETE 12
256#define PIOREAD 13
257
258#ifdef FDC_DEBUG
259static char const * const fdstates[] =
260{
261"DEVIDLE",
262"FINDWORK",
263"DOSEEK",
264"SEEKCOMPLETE",
265"IOCOMPLETE",
266"RECALCOMPLETE",
267"STARTRECAL",
268"RESETCTLR",
269"SEEKWAIT",
270"RECALWAIT",
271"MOTORWAIT",
272"IOTIMEDOUT",
273"RESETCOMPLETE",
274"PIOREAD",
275};
276
277/* CAUTION: fd_debug causes huge amounts of logging output */
278static int volatile fd_debug = 0;
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279#define TRACE0(arg) if(fd_debug) kprintf(arg)
280#define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2)
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281#else /* FDC_DEBUG */
282#define TRACE0(arg)
283#define TRACE1(arg1, arg2)
284#endif /* FDC_DEBUG */
285
8c5c0470 286void
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287fdout_wr(fdc_p fdc, u_int8_t v)
288{
289 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
290}
291
292static u_int8_t
293fdsts_rd(fdc_p fdc)
294{
295 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
296}
297
298static void
299fddata_wr(fdc_p fdc, u_int8_t v)
300{
301 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
302}
303
304static u_int8_t
305fddata_rd(fdc_p fdc)
306{
307 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
308}
309
310static void
311fdctl_wr_isa(fdc_p fdc, u_int8_t v)
312{
313 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
314}
315
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316#if 0
317
318static u_int8_t
319fdin_rd(fdc_p fdc)
320{
321 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
322}
323
324#endif
325
326static d_open_t Fdopen; /* NOTE, not fdopen */
327static d_close_t fdclose;
328static d_ioctl_t fdioctl;
329static d_strategy_t fdstrategy;
330
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331static struct dev_ops fd_ops = {
332 { "fd", FD_CDEV_MAJOR, D_DISK },
333 .d_open = Fdopen,
334 .d_close = fdclose,
335 .d_read = physread,
336 .d_write = physwrite,
337 .d_ioctl = fdioctl,
338 .d_strategy = fdstrategy,
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339};
340
341static int
342fdc_err(struct fdc_data *fdc, const char *s)
343{
344 fdc->fdc_errs++;
345 if (s) {
346 if (fdc->fdc_errs < FDC_ERRMAX)
347 device_printf(fdc->fdc_dev, "%s", s);
348 else if (fdc->fdc_errs == FDC_ERRMAX)
349 device_printf(fdc->fdc_dev, "too many errors, not "
350 "logging any more\n");
351 }
352
353 return FD_FAILED;
354}
355
356/*
357 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
358 * Unit number,
359 * # of output bytes, output bytes as ints ...,
360 * # of input bytes, input bytes as ints ...
361 */
8c5c0470 362int
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363fd_cmd(struct fdc_data *fdc, int n_out, ...)
364{
365 u_char cmd;
366 int n_in;
367 int n;
e2565a42 368 __va_list ap;
984263bc 369
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370 __va_start(ap, n_out);
371 cmd = (u_char)(__va_arg(ap, int));
372 __va_end(ap);
373 __va_start(ap, n_out);
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374 for (n = 0; n < n_out; n++)
375 {
e2565a42 376 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
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377 {
378 char msg[50];
f8c7a42d 379 ksnprintf(msg, sizeof(msg),
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380 "cmd %x failed at out byte %d of %d\n",
381 cmd, n + 1, n_out);
382 return fdc_err(fdc, msg);
383 }
384 }
e2565a42 385 n_in = __va_arg(ap, int);
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386 for (n = 0; n < n_in; n++)
387 {
e2565a42 388 int *ptr = __va_arg(ap, int *);
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389 if (fd_in(fdc, ptr) < 0)
390 {
391 char msg[50];
f8c7a42d 392 ksnprintf(msg, sizeof(msg),
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393 "cmd %02x failed at in byte %d of %d\n",
394 cmd, n + 1, n_in);
395 return fdc_err(fdc, msg);
396 }
397 }
398
399 return 0;
400}
401
402static int
403enable_fifo(fdc_p fdc)
404{
405 int i, j;
406
407 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
408
409 /*
410 * XXX:
411 * Cannot use fd_cmd the normal way here, since
412 * this might be an invalid command. Thus we send the
413 * first byte, and check for an early turn of data directon.
414 */
415
416 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
417 return fdc_err(fdc, "Enable FIFO failed\n");
418
419 /* If command is invalid, return */
420 j = FDSTS_TIMEOUT;
421 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
422 != NE7_RQM && j-- > 0) {
423 if (i == (NE7_DIO | NE7_RQM)) {
424 fdc_reset(fdc);
425 return FD_FAILED;
426 }
427 DELAY(1);
428 }
429 if (j<0 ||
430 fd_cmd(fdc, 3,
431 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
432 fdc_reset(fdc);
433 return fdc_err(fdc, "Enable FIFO failed\n");
434 }
435 fdc->flags |= FDC_HAS_FIFO;
436 return 0;
437 }
438 if (fd_cmd(fdc, 4,
439 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
440 return fdc_err(fdc, "Re-enable FIFO failed\n");
441 return 0;
442}
443
444static int
445fd_sense_drive_status(fdc_p fdc, int *st3p)
446{
447 int st3;
448
449 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
450 {
451 return fdc_err(fdc, "Sense Drive Status failed\n");
452 }
453 if (st3p)
454 *st3p = st3;
455
456 return 0;
457}
458
459static int
460fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
461{
462 int cyl, st0, ret;
463
464 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
465 if (ret) {
466 (void)fdc_err(fdc,
467 "sense intr err reading stat reg 0\n");
468 return ret;
469 }
470
471 if (st0p)
472 *st0p = st0;
473
474 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
475 /*
476 * There doesn't seem to have been an interrupt.
477 */
478 return FD_NOT_VALID;
479 }
480
481 if (fd_in(fdc, &cyl) < 0) {
482 return fdc_err(fdc, "can't get cyl num\n");
483 }
484
485 if (cylp)
486 *cylp = cyl;
487
488 return 0;
489}
490
491
492static int
493fd_read_status(fdc_p fdc, int fdsu)
494{
495 int i, ret;
496
497 for (i = 0; i < 7; i++) {
498 /*
499 * XXX types are poorly chosen. Only bytes can by read
500 * from the hardware, but fdc->status[] wants u_ints and
501 * fd_in() gives ints.
502 */
503 int status;
504
505 ret = fd_in(fdc, &status);
506 fdc->status[i] = status;
507 if (ret != 0)
508 break;
509 }
510
511 if (ret == 0)
512 fdc->flags |= FDC_STAT_VALID;
513 else
514 fdc->flags &= ~FDC_STAT_VALID;
515
516 return ret;
517}
518
519/****************************************************************************/
520/* autoconfiguration stuff */
521/****************************************************************************/
522
8c5c0470 523int
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524fdc_alloc_resources(struct fdc_data *fdc)
525{
526 device_t dev;
527 int ispnp, ispcmcia;
528
529 dev = fdc->fdc_dev;
530 ispnp = (fdc->flags & FDC_ISPNP) != 0;
531 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
532 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
533 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
534
535 /*
536 * On standard ISA, we don't just use an 8 port range
537 * (e.g. 0x3f0-0x3f7) since that covers an IDE control
538 * register at 0x3f6.
539 *
540 * Isn't PC hardware wonderful.
541 *
542 * The Y-E Data PCMCIA FDC doesn't have this problem, it
543 * uses the register with offset 6 for pseudo-DMA, and the
544 * one with offset 7 as control register.
545 */
546 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
547 &fdc->rid_ioport, 0ul, ~0ul,
548 ispcmcia ? 8 : (ispnp ? 1 : 6),
549 RF_ACTIVE);
550 if (fdc->res_ioport == 0) {
551 device_printf(dev, "cannot reserve I/O port range\n");
552 return ENXIO;
553 }
554 fdc->portt = rman_get_bustag(fdc->res_ioport);
555 fdc->porth = rman_get_bushandle(fdc->res_ioport);
556
557 if (!ispcmcia) {
558 /*
559 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
560 * and some at 0x3f0-0x3f5,0x3f7. We detect the former
561 * by checking the size and adjust the port address
562 * accordingly.
563 */
564 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
565 fdc->port_off = -2;
566
567 /*
568 * Register the control port range as rid 1 if it
569 * isn't there already. Most PnP BIOSen will have
570 * already done this but non-PnP configurations don't.
571 *
572 * And some (!!) report 0x3f2-0x3f5 and completely
573 * leave out the control register! It seems that some
574 * non-antique controller chips have a different
575 * method of programming the transfer speed which
576 * doesn't require the control register, but it's
577 * mighty bogus as the chip still responds to the
578 * address for the control register.
579 */
580 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
581 u_long ctlstart;
582
583 /* Find the control port, usually 0x3f7 */
584 ctlstart = rman_get_start(fdc->res_ioport) +
585 fdc->port_off + 7;
586
587 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
588 }
589
590 /*
591 * Now (finally!) allocate the control port.
592 */
593 fdc->rid_ctl = 1;
594 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
595 &fdc->rid_ctl,
596 0ul, ~0ul, 1, RF_ACTIVE);
597 if (fdc->res_ctl == 0) {
598 device_printf(dev,
599 "cannot reserve control I/O port range\n");
600 return ENXIO;
601 }
602 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
603 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
604 }
605
606 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
607 &fdc->rid_irq, 0ul, ~0ul, 1,
608 RF_ACTIVE);
609 if (fdc->res_irq == 0) {
610 device_printf(dev, "cannot reserve interrupt line\n");
611 return ENXIO;
612 }
613
614 if ((fdc->flags & FDC_NODMA) == 0) {
615 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
616 &fdc->rid_drq, 0ul, ~0ul, 1,
617 RF_ACTIVE);
618 if (fdc->res_drq == 0) {
619 device_printf(dev, "cannot reserve DMA request line\n");
620 return ENXIO;
621 }
622 fdc->dmachan = fdc->res_drq->r_start;
623 }
624
625 return 0;
626}
627
8c5c0470 628void
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629fdc_release_resources(struct fdc_data *fdc)
630{
631 device_t dev;
632
633 dev = fdc->fdc_dev;
634 if (fdc->res_irq != 0) {
635 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
636 fdc->res_irq);
637 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
638 fdc->res_irq);
639 }
640 if (fdc->res_ctl != 0) {
641 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
642 fdc->res_ctl);
643 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
644 fdc->res_ctl);
645 }
646 if (fdc->res_ioport != 0) {
647 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
648 fdc->res_ioport);
649 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
650 fdc->res_ioport);
651 }
652 if (fdc->res_drq != 0) {
653 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
654 fdc->res_drq);
655 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
656 fdc->res_drq);
657 }
658}
659
660/****************************************************************************/
661/* autoconfiguration stuff */
662/****************************************************************************/
663
664static struct isa_pnp_id fdc_ids[] = {
665 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
666 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
667 {0}
668};
669
8c5c0470 670int
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671fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
672{
673 struct fdc_ivars *ivars = device_get_ivars(child);
674
675 switch (which) {
676 case FDC_IVAR_FDUNIT:
677 *result = ivars->fdunit;
678 break;
679 default:
680 return ENOENT;
681 }
682 return 0;
683}
684
685/*
686 * fdc controller section.
687 */
688static int
689fdc_probe(device_t dev)
690{
691 int error, ic_type;
692 struct fdc_data *fdc;
693
694 fdc = device_get_softc(dev);
695 bzero(fdc, sizeof *fdc);
696 fdc->fdc_dev = dev;
697 fdc->fdctl_wr = fdctl_wr_isa;
698
699 /* Check pnp ids */
700 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
701 if (error == ENXIO)
702 return ENXIO;
703 if (error == 0)
704 fdc->flags |= FDC_ISPNP;
705
706 /* Attempt to allocate our resources for the duration of the probe */
707 error = fdc_alloc_resources(fdc);
708 if (error)
709 goto out;
710
711 /* First - lets reset the floppy controller */
712 fdout_wr(fdc, 0);
713 DELAY(100);
714 fdout_wr(fdc, FDO_FRST);
715
716 /* see if it can handle a command */
717 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
718 NE7_SPEC_2(2, 0), 0)) {
719 error = ENXIO;
720 goto out;
721 }
722
723 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
724 ic_type = (u_char)ic_type;
725 switch (ic_type) {
726 case 0x80:
727 device_set_desc(dev, "NEC 765 or clone");
728 fdc->fdct = FDC_NE765;
729 break;
730 case 0x81:
731 device_set_desc(dev, "Intel 82077 or clone");
732 fdc->fdct = FDC_I82077;
733 break;
734 case 0x90:
735 device_set_desc(dev, "NEC 72065B or clone");
736 fdc->fdct = FDC_NE72065;
737 break;
738 default:
739 device_set_desc(dev, "generic floppy controller");
740 fdc->fdct = FDC_UNKNOWN;
741 break;
742 }
743 }
744
745out:
746 fdc_release_resources(fdc);
747 return (error);
748}
749
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750/*
751 * Add a child device to the fdc controller. It will then be probed etc.
752 */
753static void
754fdc_add_child(device_t dev, const char *name, int unit)
755{
756 int disabled;
757 struct fdc_ivars *ivar;
758 device_t child;
759
efda3bd0 760 ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
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761 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
762 ivar->fdunit = 0;
763 child = device_add_child(dev, name, unit);
764 if (child == NULL)
765 return;
766 device_set_ivars(child, ivar);
767 if (resource_int_value(name, unit, "disabled", &disabled) == 0
768 && disabled != 0)
769 device_disable(child);
770}
771
8c5c0470 772int
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773fdc_attach(device_t dev)
774{
775 struct fdc_data *fdc;
776 int i, error;
777
778 fdc = device_get_softc(dev);
8b97cf2a
JS
779
780 callout_init(&fdc->pseudointr_ch);
781
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782 error = fdc_alloc_resources(fdc);
783 if (error) {
0ca0cd25 784 device_printf(dev, "cannot reacquire resources\n");
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785 return error;
786 }
787 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
ee61f228 788 0, fdc_intr, fdc,
e9cb6d99 789 &fdc->fdc_intr, NULL);
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790 if (error) {
791 device_printf(dev, "cannot setup interrupt\n");
792 return error;
793 }
794 fdc->fdcu = device_get_unit(dev);
795 fdc->flags |= FDC_ATTACHED;
796
797 if ((fdc->flags & FDC_NODMA) == 0) {
798 /* Acquire the DMA channel forever, The driver will do the rest */
799 /* XXX should integrate with rman */
800 isa_dma_acquire(fdc->dmachan);
801 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
802 }
803 fdc->state = DEVIDLE;
804
805 /* reset controller, turn motor off, clear fdout mirror reg */
806 fdout_wr(fdc, ((fdc->fdout = 0)));
81b5c339 807 bioq_init(&fdc->bio_queue);
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808
809 /*
810 * Probe and attach any children. We should probably detect
811 * devices from the BIOS unless overridden.
812 */
813 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
814 i != -1;
815 i = resource_query_string(i, "at", device_get_nameunit(dev)))
816 fdc_add_child(dev, resource_query_name(i),
817 resource_query_unit(i));
818
819 return (bus_generic_attach(dev));
820}
821
8c5c0470 822int
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823fdc_print_child(device_t me, device_t child)
824{
825 int retval = 0;
826
827 retval += bus_print_child_header(me, child);
e3869ec7 828 retval += kprintf(" on %s drive %d\n", device_get_nameunit(me),
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829 fdc_get_fdunit(child));
830
831 return (retval);
832}
833
834static device_method_t fdc_methods[] = {
835 /* Device interface */
836 DEVMETHOD(device_probe, fdc_probe),
837 DEVMETHOD(device_attach, fdc_attach),
838 DEVMETHOD(device_detach, bus_generic_detach),
839 DEVMETHOD(device_shutdown, bus_generic_shutdown),
840 DEVMETHOD(device_suspend, bus_generic_suspend),
841 DEVMETHOD(device_resume, bus_generic_resume),
842
843 /* Bus interface */
844 DEVMETHOD(bus_print_child, fdc_print_child),
845 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
846 /* Our children never use any other bus interface methods. */
847
848 { 0, 0 }
849};
850
851static driver_t fdc_driver = {
852 "fdc",
853 fdc_methods,
854 sizeof(struct fdc_data)
855};
856
857DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
c8b4f0e6 858DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, 0, 0);
984263bc 859
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860/******************************************************************/
861/*
862 * devices attached to the controller section.
863 */
864static int
865fd_probe(device_t dev)
866{
867 int i;
868 u_int fdt, st0, st3;
869 struct fd_data *fd;
870 struct fdc_data *fdc;
871 fdsu_t fdsu;
872 static int fd_fifo = 0;
873
874 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
875 fd = device_get_softc(dev);
876 fdc = device_get_softc(device_get_parent(dev));
877
878 bzero(fd, sizeof *fd);
879 fd->dev = dev;
880 fd->fdc = fdc;
881 fd->fdsu = fdsu;
882 fd->fdu = device_get_unit(dev);
883
884#ifdef __i386__
885 /* look up what bios thinks we have */
886 switch (fd->fdu) {
887 case 0:
888 if ((fdc->flags & FDC_ISPCMCIA))
889 fdt = RTCFDT_144M;
890 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
891 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
892 else
893 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
894 break;
895 case 1:
896 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
897 break;
898 default:
899 fdt = RTCFDT_NONE;
900 break;
901 }
902#else
903 fdt = RTCFDT_144M; /* XXX probably */
904#endif
905
906 /* is there a unit? */
907 if (fdt == RTCFDT_NONE)
908 return (ENXIO);
909
910 /* select it */
911 set_motor(fdc, fdsu, TURNON);
912 DELAY(1000000); /* 1 sec */
913
914 /* XXX This doesn't work before the first set_motor() */
915 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
916 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
917 && enable_fifo(fdc) == 0) {
918 device_printf(device_get_parent(dev),
919 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
920 }
921 fd_fifo = 1;
922
923 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
924 && (st3 & NE7_ST3_T0)) {
925 /* if at track 0, first seek inwards */
926 /* seek some steps: */
927 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
928 DELAY(300000); /* ...wait a moment... */
929 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
930 }
931
932 /* If we're at track 0 first seek inwards. */
933 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
934 /* Seek some steps... */
935 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
936 /* ...wait a moment... */
937 DELAY(300000);
938 /* make ctrlr happy: */
939 fd_sense_int(fdc, 0, 0);
940 }
941 }
942
943 for (i = 0; i < 2; i++) {
944 /*
945 * we must recalibrate twice, just in case the
946 * heads have been beyond cylinder 76, since most
947 * FDCs still barf when attempting to recalibrate
948 * more than 77 steps
949 */
950 /* go back to 0: */
951 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
952 /* a second being enough for full stroke seek*/
953 DELAY(i == 0 ? 1000000 : 300000);
954
955 /* anything responding? */
956 if (fd_sense_int(fdc, &st0, 0) == 0 &&
957 (st0 & NE7_ST0_EC) == 0)
958 break; /* already probed succesfully */
959 }
960 }
961
962 set_motor(fdc, fdsu, TURNOFF);
963
964 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
965 return (ENXIO);
966
967 fd->track = FD_NO_TRACK;
968 fd->fdc = fdc;
969 fd->fdsu = fdsu;
970 fd->options = 0;
e8b273ff
MD
971 callout_init(&fd->toffhandle);
972 callout_init(&fd->tohandle);
4fc46503 973 callout_init(&fd->motor);
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974
975 switch (fdt) {
976 case RTCFDT_12M:
977 device_set_desc(dev, "1200-KB 5.25\" drive");
978 fd->type = FD_1200;
979 break;
980 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
981 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
984263bc 982 fd->type = FD_1440;
c755a6ff 983 break;
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MD
984 case RTCFDT_144M:
985 device_set_desc(dev, "1440-KB 3.5\" drive");
986 fd->type = FD_1440;
987 break;
988 case RTCFDT_288M:
989 case RTCFDT_288M_1:
990 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
991 fd->type = FD_1440;
992 break;
993 case RTCFDT_360K:
994 device_set_desc(dev, "360-KB 5.25\" drive");
995 fd->type = FD_360;
996 break;
997 case RTCFDT_720K:
e3869ec7 998 kprintf("720-KB 3.5\" drive");
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999 fd->type = FD_720;
1000 break;
1001 default:
1002 return (ENXIO);
1003 }
983105c1 1004 fd->ft = fd_types[fd->type - 1];
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MD
1005 return (0);
1006}
1007
1008static int
1009fd_attach(device_t dev)
1010{
1011 struct fd_data *fd;
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MD
1012
1013 fd = device_get_softc(dev);
1014
983105c1 1015 disk_create(fd->fdu, &fd->disk, &fd_ops);
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MD
1016
1017 /*
983105c1
MD
1018 * Make special raw floppy devices with preset types to
1019 * make formatting easier. These override the disk management
1020 * layer for the whole-slice-disk for partitions 128-191. Note
1021 * that we do not override partition 255, which is the
1022 * whole-slice-part. If we did we would have to provide our
1023 * own DIOCGPART ioctl.
984263bc 1024 */
983105c1
MD
1025 dev_ops_add(&fd_ops,
1026 dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),
1027 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128));
1028 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 1),
1029 UID_ROOT, GID_WHEEL, 0600, "fd%d.1720", fd->fdu);
1030 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 2),
1031 UID_ROOT, GID_WHEEL, 0600, "fd%d.1480", fd->fdu);
1032 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 3),
1033 UID_ROOT, GID_WHEEL, 0600, "fd%d.1440", fd->fdu);
1034 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 4),
1035 UID_ROOT, GID_WHEEL, 0600, "fd%d.1200", fd->fdu);
1036 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 5),
1037 UID_ROOT, GID_WHEEL, 0600, "fd%d.820", fd->fdu);
1038 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 6),
1039 UID_ROOT, GID_WHEEL, 0600, "fd%d.800", fd->fdu);
1040 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 7),
1041 UID_ROOT, GID_WHEEL, 0600, "fd%d.720", fd->fdu);
1042 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 8),
1043 UID_ROOT, GID_WHEEL, 0600, "fd%d.360", fd->fdu);
1044 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 9),
1045 UID_ROOT, GID_WHEEL, 0600, "fd%d.640", fd->fdu);
1046 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 10),
1047 UID_ROOT, GID_WHEEL, 0600, "fd%d.1232", fd->fdu);
1048
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MD
1049 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1050 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1051 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1052 DEVSTAT_PRIORITY_FD);
1053 return (0);
1054}
1055
1056static int
1057fd_detach(device_t dev)
1058{
1059 struct fd_data *fd;
1060
1061 fd = device_get_softc(dev);
983105c1
MD
1062 dev_ops_remove(&fd_ops,
1063 dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),
1064 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128));
1065 disk_invalidate(&fd->disk);
1066 disk_destroy(&fd->disk);
1067 devstat_remove_entry(&fd->device_stats);
e8b273ff 1068 callout_stop(&fd->toffhandle);
4fc46503 1069 callout_stop(&fd->motor);
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MD
1070
1071 return (0);
1072}
1073
1074static device_method_t fd_methods[] = {
1075 /* Device interface */
1076 DEVMETHOD(device_probe, fd_probe),
1077 DEVMETHOD(device_attach, fd_attach),
1078 DEVMETHOD(device_detach, fd_detach),
1079 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1080 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1081 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1082
1083 { 0, 0 }
1084};
1085
1086static driver_t fd_driver = {
1087 "fd",
1088 fd_methods,
1089 sizeof(struct fd_data)
1090};
1091
1092DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1093
1094/****************************************************************************/
1095/* motor control stuff */
1096/* remember to not deselect the drive we're working on */
1097/****************************************************************************/
1098static void
1099set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1100{
1101 int fdout = fdc->fdout;
1102 int needspecify = 0;
1103
1104 if(turnon) {
1105 fdout &= ~FDO_FDSEL;
1106 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1107 } else
1108 fdout &= ~(FDO_MOEN0 << fdsu);
1109
1110 if(!turnon
1111 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1112 /* gonna turn off the last drive, put FDC to bed */
1113 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1114 else {
1115 /* make sure controller is selected and specified */
1116 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1117 needspecify = 1;
1118 fdout |= (FDO_FRST|FDO_FDMAEN);
1119 }
1120
1121 fdout_wr(fdc, fdout);
1122 fdc->fdout = fdout;
1123 TRACE1("[0x%x->FDOUT]", fdout);
1124
1125 if (needspecify) {
1126 /*
1127 * XXX
1128 * special case: since we have just woken up the FDC
1129 * from its sleep, we silently assume the command will
1130 * be accepted, and do not test for a timeout
1131 */
1132 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1133 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1134 0);
1135 if (fdc->flags & FDC_HAS_FIFO)
1136 (void) enable_fifo(fdc);
1137 }
1138}
1139
1140static void
1141fd_turnoff(void *xfd)
1142{
984263bc
MD
1143 fd_p fd = xfd;
1144
1145 TRACE1("[fd%d: turnoff]", fd->fdu);
1146
fbe276c7 1147 crit_enter();
984263bc
MD
1148 /*
1149 * Don't turn off the motor yet if the drive is active.
1150 *
1151 * If we got here, this could only mean we missed an interrupt.
1152 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1153 * after a controller reset. Just schedule a pseudo-interrupt
1154 * so the state machine gets re-entered.
1155 */
1156 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1157 fdc_intr(fd->fdc);
fbe276c7 1158 crit_exit();
984263bc
MD
1159 return;
1160 }
1161
1162 fd->flags &= ~FD_MOTOR;
1163 set_motor(fd->fdc, fd->fdsu, TURNOFF);
fbe276c7 1164 crit_exit();
984263bc
MD
1165}
1166
1167static void
1168fd_motor_on(void *xfd)
1169{
984263bc
MD
1170 fd_p fd = xfd;
1171
fbe276c7 1172 crit_enter();
984263bc
MD
1173 fd->flags &= ~FD_MOTOR_WAIT;
1174 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1175 {
1176 fdc_intr(fd->fdc);
1177 }
fbe276c7 1178 crit_exit();
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MD
1179}
1180
1181static void
1182fd_turnon(fd_p fd)
1183{
1184 if(!(fd->flags & FD_MOTOR))
1185 {
1186 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1187 set_motor(fd->fdc, fd->fdsu, TURNON);
4fc46503 1188 callout_reset(&fd->motor, hz, fd_motor_on, fd);
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MD
1189 }
1190}
1191
1192static void
1193fdc_reset(fdc_p fdc)
1194{
1195 /* Try a reset, keep motor on */
1196 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1197 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1198 DELAY(100);
1199 /* enable FDC, but defer interrupts a moment */
1200 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1201 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1202 DELAY(100);
1203 fdout_wr(fdc, fdc->fdout);
1204 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1205
1206 /* XXX after a reset, silently believe the FDC will accept commands */
1207 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1208 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1209 0);
1210 if (fdc->flags & FDC_HAS_FIFO)
1211 (void) enable_fifo(fdc);
1212}
1213
1214/****************************************************************************/
1215/* fdc in/out */
1216/****************************************************************************/
1217/*
1218 * FDC IO functions, take care of the main status register, timeout
1219 * in case the desired status bits are never set.
1220 *
1221 * These PIO loops initially start out with short delays between
1222 * each iteration in the expectation that the required condition
1223 * is usually met quickly, so it can be handled immediately. After
1224 * about 1 ms, stepping is increased to achieve a better timing
1225 * accuracy in the calls to DELAY().
1226 */
1227static int
1228fd_in(struct fdc_data *fdc, int *ptr)
1229{
1230 int i, j, step;
1231
1232 for (j = 0, step = 1;
1233 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1234 j < FDSTS_TIMEOUT;
1235 j += step) {
1236 if (i == NE7_RQM)
1237 return (fdc_err(fdc, "ready for output in input\n"));
1238 if (j == 1000)
1239 step = 1000;
1240 DELAY(step);
1241 }
1242 if (j >= FDSTS_TIMEOUT)
1243 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1244#ifdef FDC_DEBUG
1245 i = fddata_rd(fdc);
1246 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1247 *ptr = i;
1248 return (0);
1249#else /* !FDC_DEBUG */
1250 i = fddata_rd(fdc);
1251 if (ptr)
1252 *ptr = i;
1253 return (0);
1254#endif /* FDC_DEBUG */
1255}
1256
1257static int
1258out_fdc(struct fdc_data *fdc, int x)
1259{
1260 int i, j, step;
1261
1262 for (j = 0, step = 1;
1263 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1264 j < FDSTS_TIMEOUT;
1265 j += step) {
1266 if (i == (NE7_DIO|NE7_RQM))
1267 return (fdc_err(fdc, "ready for input in output\n"));
1268 if (j == 1000)
1269 step = 1000;
1270 DELAY(step);
1271 }
1272 if (j >= FDSTS_TIMEOUT)
1273 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1274
1275 /* Send the command and return */
1276 fddata_wr(fdc, x);
1277 TRACE1("[0x%x->FDDATA]", x);
1278 return (0);
1279}
1280
1281/****************************************************************************/
1282/* fdopen/fdclose */
1283/****************************************************************************/
1284int
fef8985e 1285Fdopen(struct dev_open_args *ap)
984263bc 1286{
b13267a5 1287 cdev_t dev = ap->a_head.a_dev;
983105c1
MD
1288 fdu_t fdu = dkunit(dev);
1289 struct disk_info info;
1290 struct fd_type *ft;
1291 int type;
1292 int changetype;
984263bc
MD
1293 fd_p fd;
1294 fdc_p fdc;
1295
1296 /* check bounds */
1297 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1298 return (ENXIO);
1299 fdc = fd->fdc;
1300 if ((fdc == NULL) || (fd->type == NO_TYPE))
1301 return (ENXIO);
983105c1
MD
1302
1303 /*
1304 * Figure out the type of floppy. There are special whole-disk-device
1305 * overrides that will override the current type.
1306 */
1307 type = dkpart(dev);
1308 if (type == WHOLE_SLICE_PART) {
1309 type = fd->type; /* do not change selected type data */
1310 changetype = 0;
1311 } else if (type > 128) {
1312 type -= 128; /* set to specific format */
1313 changetype = 1;
1314 } else {
1315 type = fd->type; /* reset to default */
1316 changetype = 1;
1317 }
984263bc
MD
1318 if (type > NUMDENS)
1319 return (ENXIO);
983105c1 1320 if (type != fd->type) {
984263bc
MD
1321 /*
1322 * For each type of basic drive, make sure we are trying
1323 * to open a type it can do,
1324 */
983105c1
MD
1325 switch (fd->type) {
1326 case FD_360:
1327 return (ENXIO);
1328 case FD_720:
1329 if ( type != FD_820
1330 && type != FD_800
1331 && type != FD_640
1332 )
984263bc 1333 return (ENXIO);
983105c1
MD
1334 break;
1335 case FD_1200:
1336 switch (type) {
1337 case FD_1480:
1338 type = FD_1480in5_25;
1339 break;
1340 case FD_1440:
1341 type = FD_1440in5_25;
1342 break;
1343 case FD_1232:
1344 break;
1345 case FD_820:
1346 type = FD_820in5_25;
1347 break;
1348 case FD_800:
1349 type = FD_800in5_25;
1350 break;
984263bc 1351 case FD_720:
983105c1 1352 type = FD_720in5_25;
984263bc 1353 break;
983105c1
MD
1354 case FD_640:
1355 type = FD_640in5_25;
984263bc 1356 break;
983105c1
MD
1357 case FD_360:
1358 type = FD_360in5_25;
984263bc 1359 break;
983105c1
MD
1360 default:
1361 return(ENXIO);
984263bc 1362 }
983105c1
MD
1363 break;
1364 case FD_1440:
1365 if ( type != FD_1720
1366 && type != FD_1480
1367 && type != FD_1200
1368 && type != FD_820
1369 && type != FD_800
1370 && type != FD_720
1371 && type != FD_640
1372 )
1373 return(ENXIO);
1374 break;
984263bc
MD
1375 }
1376 }
983105c1
MD
1377
1378 /*
1379 * fd->type is the basic drive type, not the current format
1380 * we are reading. We only change the type when opening the
1381 * whole-slice-partition
1382 */
1383 if (changetype)
1384 fd->ft = fd_types[type - 1];
984263bc 1385 fd->flags |= FD_OPEN;
983105c1 1386
984263bc
MD
1387 /*
1388 * Clearing the DMA overrun counter at open time is a bit messy.
1389 * Since we're only managing one counter per controller, opening
1390 * the second drive could mess it up. Anyway, if the DMA overrun
1391 * condition is really persistent, it will eventually time out
1392 * still. OTOH, clearing it here will ensure we'll at least start
1393 * trying again after a previous (maybe even long ago) failure.
1394 * Also, this is merely a stop-gap measure only that should not
1395 * happen during normal operation, so we can tolerate it to be a
1396 * bit sloppy about this.
1397 */
1398 fdc->dma_overruns = 0;
1399
983105c1
MD
1400 /*
1401 * Set disk parameters for the disk management layer.
1402 *
1403 * Note that we do not set RAWEXTENSIONS here. We override
1404 * the minor numbers in the raw-extension range and handle them
1405 * directly.
1406 */
1407 bzero(&info, sizeof(info));
1408 ft = &fd->ft;
1409 info.d_media_blksize = 128 << ft->secsize;
1410 info.d_media_blocks = ft->size;
1411 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1412 info.d_nheads = ft->heads;
1413 info.d_secpertrack = ft->sectrac;
1414 info.d_secpercyl = ft->sectrac * ft->heads;
1415 info.d_ncylinders = ft->size / info.d_secpercyl;
1416 disk_setdiskinfo(&fd->disk, &info);
1417
984263bc
MD
1418 return 0;
1419}
1420
1421int
fef8985e 1422fdclose(struct dev_close_args *ap)
984263bc 1423{
b13267a5 1424 cdev_t dev = ap->a_head.a_dev;
983105c1 1425 fdu_t fdu = dkunit(dev);
984263bc
MD
1426 struct fd_data *fd;
1427
1428 fd = devclass_get_softc(fd_devclass, fdu);
1429 fd->flags &= ~FD_OPEN;
1430 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1431
1432 return (0);
1433}
1434
1435/****************************************************************************/
1436/* fdstrategy */
1437/****************************************************************************/
fef8985e
MD
1438int
1439fdstrategy(struct dev_strategy_args *ap)
984263bc 1440{
b13267a5 1441 cdev_t dev = ap->a_head.a_dev;
fef8985e 1442 struct bio *bio = ap->a_bio;
81b5c339 1443 struct buf *bp = bio->bio_buf;
984263bc 1444 unsigned nblocks, blknum, cando;
984263bc
MD
1445 fdu_t fdu;
1446 fdc_p fdc;
1447 fd_p fd;
1448 size_t fdblk;
1449
983105c1 1450 fdu = dkunit(dev);
984263bc
MD
1451 fd = devclass_get_softc(fd_devclass, fdu);
1452 if (fd == 0)
1453 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
81b5c339 1454 (u_long)major(dev), (u_long)minor(dev));
984263bc
MD
1455 fdc = fd->fdc;
1456 if (fd->type == NO_TYPE) {
1457 bp->b_error = ENXIO;
1458 bp->b_flags |= B_ERROR;
1459 goto bad;
1460 };
1461
983105c1 1462 fdblk = 128 << (fd->ft.secsize);
10f3fee5 1463 if (bp->b_cmd != BUF_CMD_FORMAT) {
54078292 1464 if (bio->bio_offset < 0) {
e3869ec7 1465 kprintf(
54078292
MD
1466 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n",
1467 fdu, bio->bio_offset, bp->b_bcount);
984263bc
MD
1468 bp->b_error = EINVAL;
1469 bp->b_flags |= B_ERROR;
1470 goto bad;
1471 }
1472 if ((bp->b_bcount % fdblk) != 0) {
1473 bp->b_error = EINVAL;
1474 bp->b_flags |= B_ERROR;
1475 goto bad;
1476 }
1477 }
1478
1479 /*
1480 * Set up block calculations.
1481 */
54078292 1482 if (bio->bio_offset > 20000000LL * fdblk) {
984263bc
MD
1483 /*
1484 * Reject unreasonably high block number, prevent the
1485 * multiplication below from overflowing.
1486 */
1487 bp->b_error = EINVAL;
1488 bp->b_flags |= B_ERROR;
1489 goto bad;
1490 }
54078292 1491 blknum = (unsigned)(bio->bio_offset / fdblk);
983105c1 1492 nblocks = fd->ft.size;
984263bc
MD
1493 bp->b_resid = 0;
1494 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1495 if (blknum <= nblocks) {
1496 cando = (nblocks - blknum) * fdblk;
1497 bp->b_resid = bp->b_bcount - cando;
1498 if (cando == 0)
1499 goto bad; /* not actually bad but EOF */
1500 } else {
1501 bp->b_error = EINVAL;
1502 bp->b_flags |= B_ERROR;
1503 goto bad;
1504 }
1505 }
fbe276c7 1506 crit_enter();
81b5c339
MD
1507 bio->bio_driver_info = dev;
1508 bioqdisksort(&fdc->bio_queue, bio);
e8b273ff 1509 callout_stop(&fd->toffhandle);
984263bc
MD
1510
1511 /* Tell devstat we are starting on the transaction */
1512 devstat_start_transaction(&fd->device_stats);
1513 device_busy(fd->dev);
1514
1515 fdstart(fdc);
fbe276c7 1516 crit_exit();
fef8985e 1517 return(0);
984263bc
MD
1518
1519bad:
81b5c339 1520 biodone(bio);
fef8985e 1521 return(0);
984263bc
MD
1522}
1523
1524/***************************************************************\
1525* fdstart *
1526* We have just queued something.. if the controller is not busy *
1527* then simulate the case where it has just finished a command *
1528* So that it (the interrupt routine) looks on the queue for more*
1529* work to do and picks up what we just added. *
1530* If the controller is already busy, we need do nothing, as it *
1531* will pick up our work when the present work completes *
1532\***************************************************************/
1533static void
1534fdstart(struct fdc_data *fdc)
1535{
fbe276c7 1536 crit_enter();
984263bc
MD
1537 if(fdc->state == DEVIDLE)
1538 {
1539 fdc_intr(fdc);
1540 }
fbe276c7 1541 crit_exit();
984263bc
MD
1542}
1543
1544static void
1545fd_iotimeout(void *xfdc)
1546{
1547 fdc_p fdc;
984263bc
MD
1548
1549 fdc = xfdc;
1550 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1551
1552 /*
1553 * Due to IBM's brain-dead design, the FDC has a faked ready
1554 * signal, hardwired to ready == true. Thus, any command
1555 * issued if there's no diskette in the drive will _never_
1556 * complete, and must be aborted by resetting the FDC.
1557 * Many thanks, Big Blue!
1558 * The FDC must not be reset directly, since that would
1559 * interfere with the state machine. Instead, pretend that
1560 * the command completed but was invalid. The state machine
1561 * will reset the FDC and retry once.
1562 */
fbe276c7 1563 crit_enter();
984263bc
MD
1564 fdc->status[0] = NE7_ST0_IC_IV;
1565 fdc->flags &= ~FDC_STAT_VALID;
1566 fdc->state = IOTIMEDOUT;
1567 fdc_intr(fdc);
fbe276c7 1568 crit_exit();
984263bc
MD
1569}
1570
fbe276c7 1571/* just ensure it is running in a critical section */
984263bc
MD
1572static void
1573fd_pseudointr(void *xfdc)
1574{
fbe276c7 1575 crit_enter();
984263bc 1576 fdc_intr(xfdc);
fbe276c7 1577 crit_exit();
984263bc
MD
1578}
1579
1580/***********************************************************************\
1581* fdintr *
1582* keep calling the state machine until it returns a 0 *
1583* ALWAYS called at SPLBIO *
1584\***********************************************************************/
1585static void
1586fdc_intr(void *xfdc)
1587{
1588 fdc_p fdc = xfdc;
1589 while(fdstate(fdc))
1590 ;
1591}
1592
1593/*
1594 * magic pseudo-DMA initialization for YE FDC. Sets count and
1595 * direction
1596 */
1597#define SET_BCDR(fdc,wr,cnt,port) \
1598 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1599 ((cnt)-1) & 0xff); \
1600 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1601 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1602
1603/*
1604 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1605 */
10f3fee5 1606static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
984263bc
MD
1607{
1608 u_char *cptr = (u_char *)addr;
1609
10f3fee5 1610 if (cmd == BUF_CMD_READ) {
984263bc
MD
1611 if (fdc->state != PIOREAD) {
1612 fdc->state = PIOREAD;
1613 return(0);
1614 };
1615 SET_BCDR(fdc, 0, count, 0);
1616 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1617 FDC_YE_DATAPORT, cptr, count);
1618 } else {
1619 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1620 FDC_YE_DATAPORT, cptr, count);
1621 SET_BCDR(fdc, 0, count, 0);
1622 };
1623 return(1);
1624}
1625
1626/***********************************************************************\
1627* The controller state machine. *
1628* if it returns a non zero value, it should be called again immediatly *
1629\***********************************************************************/
1630static int
1631fdstate(fdc_p fdc)
1632{
1633 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1634 unsigned blknum = 0, b_cylinder = 0;
c755a6ff 1635 fdu_t fdu;
984263bc 1636 fd_p fd;
81b5c339 1637 struct bio *bio;
3a1b0fdc 1638 struct buf *bp;
984263bc
MD
1639 struct fd_formb *finfo = NULL;
1640 size_t fdblk;
b13267a5 1641 cdev_t dev;
81b5c339
MD
1642
1643 bio = fdc->bio;
1644 if (bio == NULL) {
1645 bio = bioq_first(&fdc->bio_queue);
1646 if (bio != NULL) {
1647 bioq_remove(&fdc->bio_queue, bio);
1648 fdc->bio = bio;
984263bc
MD
1649 }
1650 }
81b5c339 1651 if (bio == NULL) {
984263bc
MD
1652 /***********************************************\
1653 * nothing left for this controller to do *
1654 * Force into the IDLE state, *
1655 \***********************************************/
1656 fdc->state = DEVIDLE;
1657 if (fdc->fd) {
1658 device_printf(fdc->fdc_dev,
1659 "unexpected valid fd pointer\n");
1660 fdc->fd = (fd_p) 0;
1661 fdc->fdu = -1;
1662 }
1663 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1664 return (0);
1665 }
81b5c339
MD
1666 bp = bio->bio_buf;
1667 dev = bio->bio_driver_info;
1668
983105c1 1669 fdu = dkunit(dev);
984263bc 1670 fd = devclass_get_softc(fd_devclass, fdu);
983105c1 1671 fdblk = 128 << fd->ft.secsize;
984263bc
MD
1672 if (fdc->fd && (fd != fdc->fd))
1673 device_printf(fd->dev, "confused fd pointers\n");
10f3fee5
MD
1674 read = (bp->b_cmd == BUF_CMD_READ);
1675 format = (bp->b_cmd == BUF_CMD_FORMAT);
984263bc
MD
1676 if (format) {
1677 finfo = (struct fd_formb *)bp->b_data;
1678 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1679 - (char *)finfo;
1680 }
1681 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
54078292
MD
1682 blknum = (unsigned)(bio->bio_offset / fdblk) +
1683 fd->skip /fdblk;
983105c1 1684 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads);
984263bc
MD
1685 }
1686 TRACE1("fd%d", fdu);
1687 TRACE1("[%s]", fdstates[fdc->state]);
1688 TRACE1("(0x%x)", fd->flags);
e8b273ff 1689 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
984263bc
MD
1690 switch (fdc->state)
1691 {
1692 case DEVIDLE:
1693 case FINDWORK: /* we have found new work */
1694 fdc->retry = 0;
1695 fd->skip = 0;
1696 fdc->fd = fd;
1697 fdc->fdu = fdu;
983105c1
MD
1698 fdc->fdctl_wr(fdc, fd->ft.trans);
1699 TRACE1("[0x%x->FDCTL]", fd->ft.trans);
984263bc
MD
1700 /*******************************************************\
1701 * If the next drive has a motor startup pending, then *
1702 * it will start up in its own good time *
1703 \*******************************************************/
1704 if(fd->flags & FD_MOTOR_WAIT) {
1705 fdc->state = MOTORWAIT;
1706 return (0); /* come back later */
1707 }
1708 /*******************************************************\
1709 * Maybe if it's not starting, it SHOULD be starting *
1710 \*******************************************************/
1711 if (!(fd->flags & FD_MOTOR))
1712 {
1713 fdc->state = MOTORWAIT;
1714 fd_turnon(fd);
1715 return (0);
1716 }
1717 else /* at least make sure we are selected */
1718 {
1719 set_motor(fdc, fd->fdsu, TURNON);
1720 }
1721 if (fdc->flags & FDC_NEEDS_RESET) {
1722 fdc->state = RESETCTLR;
1723 fdc->flags &= ~FDC_NEEDS_RESET;
1724 } else
1725 fdc->state = DOSEEK;
1726 break;
1727 case DOSEEK:
1728 if (b_cylinder == (unsigned)fd->track)
1729 {
1730 fdc->state = SEEKCOMPLETE;
1731 break;
1732 }
1733 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
983105c1 1734 fd->fdsu, b_cylinder * fd->ft.steptrac,
984263bc
MD
1735 0))
1736 {
1737 /*
1738 * seek command not accepted, looks like
1739 * the FDC went off to the Saints...
1740 */
1741 fdc->retry = 6; /* try a reset */
1742 return(retrier(fdc));
1743 }
1744 fd->track = FD_NO_TRACK;
1745 fdc->state = SEEKWAIT;
1746 return(0); /* will return later */
1747 case SEEKWAIT:
1748 /* allow heads to settle */
4fc46503
JS
1749 callout_reset(&fdc->pseudointr_ch, hz / 16,
1750 fd_pseudointr, fdc);
984263bc
MD
1751 fdc->state = SEEKCOMPLETE;
1752 return(0); /* will return later */
1753 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1754 /* Make sure seek really happened*/
1755 if(fd->track == FD_NO_TRACK) {
983105c1 1756 int descyl = b_cylinder * fd->ft.steptrac;
984263bc
MD
1757 do {
1758 /*
1759 * This might be a "ready changed" interrupt,
1760 * which cannot really happen since the
1761 * RDY pin is hardwired to + 5 volts. This
1762 * generally indicates a "bouncing" intr
1763 * line, so do one of the following:
1764 *
1765 * When running on an enhanced FDC that is
1766 * known to not go stuck after responding
1767 * with INVALID, fetch all interrupt states
1768 * until seeing either an INVALID or a
1769 * real interrupt condition.
1770 *
1771 * When running on a dumb old NE765, give
1772 * up immediately. The controller will
1773 * provide up to four dummy RC interrupt
1774 * conditions right after reset (for the
1775 * corresponding four drives), so this is
1776 * our only chance to get notice that it
1777 * was not the FDC that caused the interrupt.
1778 */
1779 if (fd_sense_int(fdc, &st0, &cyl)
1780 == FD_NOT_VALID)
1781 return 0;
1782 if(fdc->fdct == FDC_NE765
1783 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1784 return 0; /* hope for a real intr */
1785 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1786
1787 if (0 == descyl) {
1788 int failed = 0;
1789 /*
1790 * seek to cyl 0 requested; make sure we are
1791 * really there
1792 */
1793 if (fd_sense_drive_status(fdc, &st3))
1794 failed = 1;
1795 if ((st3 & NE7_ST3_T0) == 0) {
e3869ec7 1796 kprintf(
984263bc
MD
1797 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1798 fdu, st3, NE7_ST3BITS);
1799 failed = 1;
1800 }
1801
1802 if (failed) {
1803 if(fdc->retry < 3)
1804 fdc->retry = 3;
1805 return (retrier(fdc));
1806 }
1807 }
1808
1809 if (cyl != descyl) {
e3869ec7 1810 kprintf(
984263bc
MD
1811 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1812 fdu, descyl, cyl, st0);
1813 if (fdc->retry < 3)
1814 fdc->retry = 3;
1815 return (retrier(fdc));
1816 }
1817 }
1818
1819 fd->track = b_cylinder;
10f3fee5
MD
1820 if (!(fdc->flags & FDC_NODMA)) {
1821 isa_dmastart(isa_dmabp(bp),
1822 bp->b_data+fd->skip,
984263bc 1823 format ? bp->b_bcount : fdblk, fdc->dmachan);
10f3fee5 1824 }
983105c1
MD
1825 sectrac = fd->ft.sectrac;
1826 sec = blknum % (sectrac * fd->ft.heads);
984263bc
MD
1827 head = sec / sectrac;
1828 sec = sec % sectrac + 1;
1829 fd->hddrv = ((head&1)<<2)+fdu;
1830
1831 if(format || !read)
1832 {
1833 /* make sure the drive is writable */
1834 if(fd_sense_drive_status(fdc, &st3) != 0)
1835 {
1836 /* stuck controller? */
1837 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1838 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1839 bp->b_data + fd->skip,
1840 format ? bp->b_bcount : fdblk,
1841 fdc->dmachan);
1842 fdc->retry = 6; /* reset the beast */
1843 return (retrier(fdc));
1844 }
1845 if(st3 & NE7_ST3_WP)
1846 {
1847 /*
1848 * XXX YES! this is ugly.
1849 * in order to force the current operation
1850 * to fail, we will have to fake an FDC
1851 * error - all error handling is done
1852 * by the retrier()
1853 */
1854 fdc->status[0] = NE7_ST0_IC_AT;
1855 fdc->status[1] = NE7_ST1_NW;
1856 fdc->status[2] = 0;
1857 fdc->status[3] = fd->track;
1858 fdc->status[4] = head;
1859 fdc->status[5] = sec;
1860 fdc->retry = 8; /* break out immediately */
1861 fdc->state = IOTIMEDOUT; /* not really... */
1862 return (1);
1863 }
1864 }
1865
1866 if (format) {
1867 if (fdc->flags & FDC_NODMA) {
1868 /*
1869 * This seems to be necessary for
1870 * whatever obscure reason; if we omit
1871 * it, we end up filling the sector ID
1872 * fields of the newly formatted track
1873 * entirely with garbage, causing
1874 * `wrong cylinder' errors all over
1875 * the place when trying to read them
1876 * back.
1877 *
1878 * Umpf.
1879 */
1880 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1881
10f3fee5 1882 (void)fdcpio(fdc,bp->b_cmd,
984263bc
MD
1883 bp->b_data+fd->skip,
1884 bp->b_bcount);
1885
1886 }
1887 /* formatting */
1888 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1889 finfo->fd_formb_secshift,
1890 finfo->fd_formb_nsecs,
1891 finfo->fd_formb_gaplen,
1892 finfo->fd_formb_fillbyte, 0)) {
1893 /* controller fell over */
1894 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1895 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1896 bp->b_data + fd->skip,
1897 format ? bp->b_bcount : fdblk,
1898 fdc->dmachan);
1899 fdc->retry = 6;
1900 return (retrier(fdc));
1901 }
1902 } else {
1903 if (fdc->flags & FDC_NODMA) {
1904 /*
1905 * this seems to be necessary even when
1906 * reading data
1907 */
1908 SET_BCDR(fdc, 1, fdblk, 0);
1909
1910 /*
1911 * perform the write pseudo-DMA before
1912 * the WRITE command is sent
1913 */
1914 if (!read)
10f3fee5 1915 (void)fdcpio(fdc,bp->b_cmd,
984263bc
MD
1916 bp->b_data+fd->skip,
1917 fdblk);
1918 }
1919 if (fd_cmd(fdc, 9,
1920 (read ? NE7CMD_READ : NE7CMD_WRITE),
1921 head << 2 | fdu, /* head & unit */
1922 fd->track, /* track */
1923 head,
1924 sec, /* sector + 1 */
983105c1 1925 fd->ft.secsize, /* sector size */
984263bc 1926 sectrac, /* sectors/track */
983105c1
MD
1927 fd->ft.gap, /* gap size */
1928 fd->ft.datalen, /* data length */
984263bc
MD
1929 0)) {
1930 /* the beast is sleeping again */
1931 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1932 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1933 bp->b_data + fd->skip,
1934 format ? bp->b_bcount : fdblk,
1935 fdc->dmachan);
1936 fdc->retry = 6;
1937 return (retrier(fdc));
1938 }
1939 }
1940 if (fdc->flags & FDC_NODMA)
1941 /*
1942 * if this is a read, then simply await interrupt
1943 * before performing PIO
1944 */
10f3fee5 1945 if (read && !fdcpio(fdc,bp->b_cmd,
984263bc 1946 bp->b_data+fd->skip,fdblk)) {
e8b273ff
MD
1947 callout_reset(&fd->tohandle, hz,
1948 fd_iotimeout, fdc);
984263bc
MD
1949 return(0); /* will return later */
1950 };
1951
1952 /*
1953 * write (or format) operation will fall through and
1954 * await completion interrupt
1955 */
1956 fdc->state = IOCOMPLETE;
e8b273ff 1957 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
984263bc
MD
1958 return (0); /* will return later */
1959 case PIOREAD:
1960 /*
1961 * actually perform the PIO read. The IOCOMPLETE case
1962 * removes the timeout for us.
1963 */
10f3fee5 1964 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
984263bc
MD
1965 fdc->state = IOCOMPLETE;
1966 /* FALLTHROUGH */
1967 case IOCOMPLETE: /* IO DONE, post-analyze */
e8b273ff 1968 callout_stop(&fd->tohandle);
984263bc
MD
1969
1970 if (fd_read_status(fdc, fd->fdsu)) {
10f3fee5
MD
1971 if (!(fdc->flags & FDC_NODMA)) {
1972 isa_dmadone(isa_dmabp(bp),
1973 bp->b_data + fd->skip,
984263bc
MD
1974 format ? bp->b_bcount : fdblk,
1975 fdc->dmachan);
10f3fee5 1976 }
984263bc
MD
1977 if (fdc->retry < 6)
1978 fdc->retry = 6; /* force a reset */
1979 return (retrier(fdc));
1980 }
1981
1982 fdc->state = IOTIMEDOUT;
1983
1984 /* FALLTHROUGH */
1985
1986 case IOTIMEDOUT:
10f3fee5
MD
1987 if (!(fdc->flags & FDC_NODMA)) {
1988 isa_dmadone(isa_dmabp(bp),
1989 bp->b_data + fd->skip,
984263bc 1990 format ? bp->b_bcount : fdblk, fdc->dmachan);
10f3fee5 1991 }
984263bc
MD
1992 if (fdc->status[0] & NE7_ST0_IC) {
1993 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1994 && fdc->status[1] & NE7_ST1_OR) {
1995 /*
1996 * DMA overrun. Someone hogged the bus and
1997 * didn't release it in time for the next
1998 * FDC transfer.
1999 *
2000 * We normally restart this without bumping
2001 * the retry counter. However, in case
2002 * something is seriously messed up (like
2003 * broken hardware), we rather limit the
2004 * number of retries so the IO operation
2005 * doesn't block indefinately.
2006 */
2007 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
2008 fdc->state = SEEKCOMPLETE;
2009 return (1);
2010 } /* else fall through */
2011 }
2012 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
2013 && fdc->retry < 6)
2014 fdc->retry = 6; /* force a reset */
2015 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2016 && fdc->status[2] & NE7_ST2_WC
2017 && fdc->retry < 3)
2018 fdc->retry = 3; /* force recalibrate */
2019 return (retrier(fdc));
2020 }
2021 /* All OK */
2022 /* Operation successful, retry DMA overruns again next time. */
2023 fdc->dma_overruns = 0;
2024 fd->skip += fdblk;
2025 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
2026 /* set up next transfer */
2027 fdc->state = DOSEEK;
2028 } else {
2029 /* ALL DONE */
2030 fd->skip = 0;
81b5c339 2031 fdc->bio = NULL;
984263bc
MD
2032 device_unbusy(fd->dev);
2033 devstat_end_transaction_buf(&fd->device_stats, bp);
81b5c339 2034 biodone(bio);
984263bc
MD
2035 fdc->fd = (fd_p) 0;
2036 fdc->fdu = -1;
2037 fdc->state = FINDWORK;
2038 }
2039 return (1);
2040 case RESETCTLR:
2041 fdc_reset(fdc);
2042 fdc->retry++;
2043 fdc->state = RESETCOMPLETE;
2044 return (0);
2045 case RESETCOMPLETE:
2046 /*
2047 * Discard all the results from the reset so that they
2048 * can't cause an unexpected interrupt later.
2049 */
2050 for (i = 0; i < 4; i++)
2051 (void)fd_sense_int(fdc, &st0, &cyl);
2052 fdc->state = STARTRECAL;
2053 /* Fall through. */
2054 case STARTRECAL:
2055 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
2056 /* arrgl */
2057 fdc->retry = 6;
2058 return (retrier(fdc));
2059 }
2060 fdc->state = RECALWAIT;
2061 return (0); /* will return later */
2062 case RECALWAIT:
2063 /* allow heads to settle */
4fc46503 2064 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
984263bc
MD
2065 fdc->state = RECALCOMPLETE;
2066 return (0); /* will return later */
2067 case RECALCOMPLETE:
2068 do {
2069 /*
2070 * See SEEKCOMPLETE for a comment on this:
2071 */
2072 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2073 return 0;
2074 if(fdc->fdct == FDC_NE765
2075 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2076 return 0; /* hope for a real intr */
2077 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2078 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2079 {
2080 if(fdc->retry > 3)
2081 /*
2082 * a recalibrate from beyond cylinder 77
2083 * will "fail" due to the FDC limitations;
2084 * since people used to complain much about
2085 * the failure message, try not logging
2086 * this one if it seems to be the first
2087 * time in a line
2088 */
e3869ec7 2089 kprintf("fd%d: recal failed ST0 %b cyl %d\n",
984263bc
MD
2090 fdu, st0, NE7_ST0BITS, cyl);
2091 if(fdc->retry < 3) fdc->retry = 3;
2092 return (retrier(fdc));
2093 }
2094 fd->track = 0;
2095 /* Seek (probably) necessary */
2096 fdc->state = DOSEEK;
2097 return (1); /* will return immediatly */
2098 case MOTORWAIT:
2099 if(fd->flags & FD_MOTOR_WAIT)
2100 {
2101 return (0); /* time's not up yet */
2102 }
2103 if (fdc->flags & FDC_NEEDS_RESET) {
2104 fdc->state = RESETCTLR;
2105 fdc->flags &= ~FDC_NEEDS_RESET;
2106 } else {
2107 /*
2108 * If all motors were off, then the controller was
2109 * reset, so it has lost track of the current
2110 * cylinder. Recalibrate to handle this case.
2111 * But first, discard the results of the reset.
2112 */
2113 fdc->state = RESETCOMPLETE;
2114 }
2115 return (1); /* will return immediatly */
2116 default:
2117 device_printf(fdc->fdc_dev, "unexpected FD int->");
2118 if (fd_read_status(fdc, fd->fdsu) == 0)
e3869ec7 2119 kprintf("FDC status :%x %x %x %x %x %x %x ",
984263bc
MD
2120 fdc->status[0],
2121 fdc->status[1],
2122 fdc->status[2],
2123 fdc->status[3],
2124 fdc->status[4],
2125 fdc->status[5],
2126 fdc->status[6] );
2127 else
e3869ec7 2128 kprintf("No status available ");
984263bc
MD
2129 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2130 {
e3869ec7 2131 kprintf("[controller is dead now]\n");
984263bc
MD
2132 return (0);
2133 }
e3869ec7 2134 kprintf("ST0 = %x, PCN = %x\n", st0, cyl);
984263bc
MD
2135 return (0);
2136 }
2137 /*XXX confusing: some branches return immediately, others end up here*/
2138 return (1); /* Come back immediatly to new state */
2139}
2140
2141static int
2142retrier(struct fdc_data *fdc)
2143{
81b5c339 2144 struct bio *bio;
3a1b0fdc 2145 struct buf *bp;
984263bc 2146 struct fd_data *fd;
b13267a5 2147 cdev_t dev;
984263bc
MD
2148 int fdu;
2149
81b5c339
MD
2150 bio = fdc->bio;
2151 bp = bio->bio_buf;
2152 dev = bio->bio_driver_info;
984263bc
MD
2153
2154 /* XXX shouldn't this be cached somewhere? */
983105c1 2155 fdu = dkunit(dev);
984263bc
MD
2156 fd = devclass_get_softc(fd_devclass, fdu);
2157 if (fd->options & FDOPT_NORETRY)
2158 goto fail;
2159
2160 switch (fdc->retry) {
2161 case 0: case 1: case 2:
2162 fdc->state = SEEKCOMPLETE;
2163 break;
2164 case 3: case 4: case 5:
2165 fdc->state = STARTRECAL;
2166 break;
2167 case 6:
2168 fdc->state = RESETCTLR;
2169 break;
2170 case 7:
2171 break;
2172 default:
2173 fail:
2174 {
2175 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
984263bc 2176
e4c9c0c8 2177 if (printerror) {
ee3ad2c9
MD
2178 /*
2179 * note: use the correct device for more
2180 * verbose error reporting.
2181 */
983105c1 2182 diskerr(bio, dev,
ee3ad2c9 2183 "hard error", LOG_PRINTF,
a688b15c 2184 fdc->fd->skip);
e4c9c0c8 2185 }
984263bc
MD
2186 if (printerror) {
2187 if (fdc->flags & FDC_STAT_VALID)
e3869ec7 2188 kprintf(
984263bc
MD
2189 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2190 fdc->status[0], NE7_ST0BITS,
2191 fdc->status[1], NE7_ST1BITS,
2192 fdc->status[2], NE7_ST2BITS,
2193 fdc->status[3], fdc->status[4],
2194 fdc->status[5]);
2195 else
e3869ec7 2196 kprintf(" (No status)\n");
984263bc
MD
2197 }
2198 }
2199 bp->b_flags |= B_ERROR;
2200 bp->b_error = EIO;
2201 bp->b_resid += bp->b_bcount - fdc->fd->skip;
81b5c339 2202 fdc->bio = NULL;
984263bc
MD
2203 fdc->fd->skip = 0;
2204 device_unbusy(fd->dev);
2205 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
81b5c339 2206 biodone(bio);
984263bc
MD
2207 fdc->state = FINDWORK;
2208 fdc->flags |= FDC_NEEDS_RESET;
2209 fdc->fd = (fd_p) 0;
2210 fdc->fdu = -1;
2211 return (1);
2212 }
2213 fdc->retry++;
2214 return (1);
2215}
2216
014958fd
MD
2217static void
2218fdformat_wakeup(struct bio *bio)
2219{
2220 bio->bio_buf->b_cmd = BUF_CMD_DONE;
2221 wakeup(bio);
2222}
2223
984263bc 2224static int
b13267a5 2225fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred)
984263bc
MD
2226{
2227 fdu_t fdu;
2228 fd_p fd;
984263bc 2229 struct buf *bp;
fbe276c7 2230 int rv = 0;
984263bc
MD
2231 size_t fdblk;
2232
983105c1 2233 fdu = dkunit(dev);
984263bc 2234 fd = devclass_get_softc(fd_devclass, fdu);
983105c1 2235 fdblk = 128 << fd->ft.secsize;
984263bc
MD
2236
2237 /* set up a buffer header for fdstrategy() */
014958fd 2238 bp = getpbuf(NULL);
10f3fee5 2239 bp->b_cmd = BUF_CMD_FORMAT;
984263bc
MD
2240
2241 /*
2242 * calculate a fake blkno, so fdstrategy() would initiate a
2243 * seek to the requested cylinder
2244 */
54078292 2245 bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
983105c1
MD
2246 (fd->ft.sectrac * fd->ft.heads)
2247 + finfo->head * fd->ft.sectrac) * fdblk;
81b5c339 2248 bp->b_bio1.bio_driver_info = dev;
014958fd 2249 bp->b_bio1.bio_done = fdformat_wakeup;
984263bc
MD
2250
2251 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2252 bp->b_data = (caddr_t)finfo;
2253
2254 /* now do the format */
81b5c339 2255 dev_dstrategy(dev, &bp->b_bio1);
984263bc
MD
2256
2257 /* ...and wait for it to complete */
fbe276c7 2258 crit_enter();
10f3fee5 2259 while (bp->b_cmd != BUF_CMD_DONE) {
014958fd 2260 rv = tsleep(&bp->b_bio1, 0, "fdform", 20 * hz);
984263bc
MD
2261 if (rv == EWOULDBLOCK)
2262 break;
2263 }
fbe276c7 2264 crit_exit();
984263bc
MD
2265
2266 if (rv == EWOULDBLOCK) {
2267 /* timed out */
2268 rv = EIO;
2269 device_unbusy(fd->dev);
81b5c339 2270 biodone(&bp->b_bio1);
984263bc
MD
2271 }
2272 if (bp->b_flags & B_ERROR)
2273 rv = bp->b_error;
2274 /*
2275 * allow the process to be swapped
2276 */
014958fd 2277 relpbuf(bp, NULL);
984263bc
MD
2278 return rv;
2279}
2280
2281/*
2282 * TODO: don't allocate buffer on stack.
2283 */
2284
2285static int
fef8985e 2286fdioctl(struct dev_ioctl_args *ap)
984263bc 2287{
b13267a5 2288 cdev_t dev = ap->a_head.a_dev;
983105c1 2289 fdu_t fdu = dkunit(dev);
984263bc 2290 fd_p fd = devclass_get_softc(fd_devclass, fdu);
984263bc 2291 struct fdc_status *fsp;
984263bc
MD
2292 int error = 0;
2293
fef8985e 2294 switch (ap->a_cmd) {
984263bc 2295 case FD_FORM:
fef8985e 2296 if ((ap->a_fflag & FWRITE) == 0)
984263bc 2297 error = EBADF; /* must be opened for writing */
fef8985e 2298 else if (((struct fd_formb *)ap->a_data)->format_version !=
984263bc
MD
2299 FD_FORMAT_VERSION)
2300 error = EINVAL; /* wrong version of formatting prog */
2301 else
fef8985e 2302 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred);
984263bc
MD
2303 break;
2304
2305 case FD_GTYPE: /* get drive type */
983105c1 2306 *(struct fd_type *)ap->a_data = fd->ft;
984263bc
MD
2307 break;
2308
2309 case FD_STYPE: /* set drive type */
2310 /* this is considered harmful; only allow for superuser */
895c1f85 2311 if (priv_check_cred(ap->a_cred, PRIV_ROOT, 0) != 0)
984263bc 2312 return EPERM;
983105c1 2313 fd->ft = *(struct fd_type *)ap->a_data;
984263bc
MD
2314 break;
2315
2316 case FD_GOPTS: /* get drive options */
fef8985e 2317 *(int *)ap->a_data = fd->options;
984263bc
MD
2318 break;
2319
2320 case FD_SOPTS: /* set drive options */
fef8985e 2321 fd->options = *(int *)ap->a_data;
984263bc
MD
2322 break;
2323
2324 case FD_GSTAT:
fef8985e 2325 fsp = (struct fdc_status *)ap->a_data;
984263bc
MD
2326 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2327 return EINVAL;
2328 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2329 break;
2330
2331 default:
2332 error = ENOTTY;
2333 break;
2334 }
2335 return (error);
2336}
2337
2338/*
2339 * Hello emacs, these are the
2340 * Local Variables:
2341 * c-indent-level: 8
2342 * c-continued-statement-offset: 8
2343 * c-continued-brace-offset: 0
2344 * c-brace-offset: -8
2345 * c-brace-imaginary-offset: 0
2346 * c-argdecl-indent: 8
2347 * c-label-offset: -8
2348 * c++-hanging-braces: 1
2349 * c++-access-specifier-offset: -8
2350 * c++-empty-arglist-indent: 8
2351 * c++-friend-offset: 0
2352 * End:
2353 */