kernel: Remove two more major numbers.
[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 $
54 *
55 */
56
57#include "opt_fdc.h"
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58
59#include <sys/param.h>
60#include <sys/systm.h>
fabb8ceb 61#include <sys/bootmaj.h>
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62#include <sys/kernel.h>
63#include <sys/buf.h>
64#include <sys/bus.h>
65#include <sys/conf.h>
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66#include <sys/diskslice.h>
67#include <sys/disk.h>
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68#include <sys/devicestat.h>
69#include <sys/fcntl.h>
70#include <sys/malloc.h>
71#include <sys/module.h>
72#include <sys/proc.h>
895c1f85 73#include <sys/priv.h>
984263bc 74#include <sys/syslog.h>
335dda38 75#include <sys/device.h>
984263bc 76#include <sys/bus.h>
984263bc 77#include <sys/rman.h>
3020e3be 78#include <sys/buf2.h>
fbe276c7 79#include <sys/thread2.h>
3020e3be 80
984263bc 81#include <machine/clock.h>
664f5072 82#include <machine/inttypes.h>
984263bc 83#include <machine/ioctl_fd.h>
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84#include <machine/stdarg.h>
85
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86#include <bus/isa/isavar.h>
87#include <bus/isa/isareg.h>
88#include "fdreg.h"
89#include "fdc.h"
90#include <bus/isa/rtc.h>
984263bc 91
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92/* configuration flags */
93#define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
94#define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
95
96/* internally used only, not really from CMOS: */
97#define RTCFDT_144M_PRETENDED 0x1000
98
99/* error returns for fd_cmd() */
100#define FD_FAILED -1
101#define FD_NOT_VALID -2
102#define FDC_ERRMAX 100 /* do not log more */
103/*
104 * Stop retrying after this many DMA overruns. Since each retry takes
105 * one revolution, with 300 rpm., 25 retries take approximately 10
106 * seconds which the read attempt will block in case the DMA overrun
107 * is persistent.
108 */
109#define FDC_DMAOV_MAX 25
110
111/*
112 * Timeout value for the PIO loops to wait until the FDC main status
113 * register matches our expectations (request for master, direction
114 * bit). This is supposed to be a number of microseconds, although
115 * timing might actually not be very accurate.
116 *
117 * Timeouts of 100 msec are believed to be required for some broken
118 * (old) hardware.
119 */
120#define FDSTS_TIMEOUT 100000
121
122#define NUMTYPES 17
123#define NUMDENS (NUMTYPES - 7)
124
125/* These defines (-1) must match index for fd_types */
126#define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
127#define NO_TYPE 0 /* must match NO_TYPE in ft.c */
128#define FD_1720 1
129#define FD_1480 2
130#define FD_1440 3
131#define FD_1200 4
132#define FD_820 5
133#define FD_800 6
134#define FD_720 7
135#define FD_360 8
136#define FD_640 9
137#define FD_1232 10
138
139#define FD_1480in5_25 11
140#define FD_1440in5_25 12
141#define FD_820in5_25 13
142#define FD_800in5_25 14
143#define FD_720in5_25 15
144#define FD_360in5_25 16
145#define FD_640in5_25 17
146
147
148static struct fd_type fd_types[NUMTYPES] =
149{
150{ 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
151{ 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
152{ 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
153{ 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
154{ 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
155{ 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
156{ 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
157{ 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
158{ 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
159{ 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
160
161{ 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
162{ 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
163{ 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
164{ 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
165{ 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
166{ 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
167{ 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
168};
169
170#define DRVS_PER_CTLR 2 /* 2 floppies */
171
172/***********************************************************************\
173* Per controller structure. *
174\***********************************************************************/
8c5c0470 175devclass_t fdc_devclass;
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176
177/***********************************************************************\
178* Per drive structure. *
179* N per controller (DRVS_PER_CTLR) *
180\***********************************************************************/
181struct fd_data {
182 struct fdc_data *fdc; /* pointer to controller structure */
183 int fdsu; /* this units number on this controller */
184 int type; /* Drive type (FD_1440...) */
983105c1 185 struct fd_type ft; /* the type descriptor */
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186 int flags;
187#define FD_OPEN 0x01 /* it's open */
188#define FD_ACTIVE 0x02 /* it's active */
189#define FD_MOTOR 0x04 /* motor should be on */
190#define FD_MOTOR_WAIT 0x08 /* motor coming up */
191 int skip;
192 int hddrv;
193#define FD_NO_TRACK -2
194 int track; /* where we think the head is */
195 int options; /* user configurable options, see ioctl_fd.h */
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196 struct callout toffhandle;
197 struct callout tohandle;
4fc46503 198 struct callout motor;
983105c1 199 struct disk disk;
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200 struct devstat device_stats;
201 device_t dev;
202 fdu_t fdu;
203};
204
205struct fdc_ivars {
206 int fdunit;
207};
208static devclass_t fd_devclass;
209
210/***********************************************************************\
211* Throughout this file the following conventions will be used: *
212* fd is a pointer to the fd_data struct for the drive in question *
213* fdc is a pointer to the fdc_data struct for the controller *
214* fdu is the floppy drive unit number *
215* fdcu is the floppy controller unit number *
216* fdsu is the floppy drive unit number on that controller. (sub-unit) *
217\***********************************************************************/
218
219/* internal functions */
220static void fdc_intr(void *);
221static void set_motor(struct fdc_data *, int, int);
222# define TURNON 1
223# define TURNOFF 0
224static timeout_t fd_turnoff;
225static timeout_t fd_motor_on;
226static void fd_turnon(struct fd_data *);
227static void fdc_reset(fdc_p);
228static int fd_in(struct fdc_data *, int *);
229static int out_fdc(struct fdc_data *, int);
230static void fdstart(struct fdc_data *);
231static timeout_t fd_iotimeout;
232static timeout_t fd_pseudointr;
233static int fdstate(struct fdc_data *);
234static int retrier(struct fdc_data *);
b13267a5 235static int fdformat(cdev_t, struct fd_formb *, struct ucred *);
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236
237static int enable_fifo(fdc_p fdc);
238
239static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
240
241
242#define DEVIDLE 0
243#define FINDWORK 1
244#define DOSEEK 2
245#define SEEKCOMPLETE 3
246#define IOCOMPLETE 4
247#define RECALCOMPLETE 5
248#define STARTRECAL 6
249#define RESETCTLR 7
250#define SEEKWAIT 8
251#define RECALWAIT 9
252#define MOTORWAIT 10
253#define IOTIMEDOUT 11
254#define RESETCOMPLETE 12
255#define PIOREAD 13
256
257#ifdef FDC_DEBUG
258static char const * const fdstates[] =
259{
260"DEVIDLE",
261"FINDWORK",
262"DOSEEK",
263"SEEKCOMPLETE",
264"IOCOMPLETE",
265"RECALCOMPLETE",
266"STARTRECAL",
267"RESETCTLR",
268"SEEKWAIT",
269"RECALWAIT",
270"MOTORWAIT",
271"IOTIMEDOUT",
272"RESETCOMPLETE",
273"PIOREAD",
274};
275
276/* CAUTION: fd_debug causes huge amounts of logging output */
277static int volatile fd_debug = 0;
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278#define TRACE0(arg) if(fd_debug) kprintf(arg)
279#define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2)
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280#else /* FDC_DEBUG */
281#define TRACE0(arg)
282#define TRACE1(arg1, arg2)
283#endif /* FDC_DEBUG */
284
8c5c0470 285void
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286fdout_wr(fdc_p fdc, u_int8_t v)
287{
288 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
289}
290
291static u_int8_t
292fdsts_rd(fdc_p fdc)
293{
294 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
295}
296
297static void
298fddata_wr(fdc_p fdc, u_int8_t v)
299{
300 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
301}
302
303static u_int8_t
304fddata_rd(fdc_p fdc)
305{
306 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
307}
308
309static void
310fdctl_wr_isa(fdc_p fdc, u_int8_t v)
311{
312 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
313}
314
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315#if 0
316
317static u_int8_t
318fdin_rd(fdc_p fdc)
319{
320 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
321}
322
323#endif
324
325static d_open_t Fdopen; /* NOTE, not fdopen */
326static d_close_t fdclose;
327static d_ioctl_t fdioctl;
328static d_strategy_t fdstrategy;
329
fef8985e 330static struct dev_ops fd_ops = {
311467df 331 { "fd", 0, D_DISK },
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332 .d_open = Fdopen,
333 .d_close = fdclose,
334 .d_read = physread,
335 .d_write = physwrite,
336 .d_ioctl = fdioctl,
337 .d_strategy = fdstrategy,
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338};
339
340static int
341fdc_err(struct fdc_data *fdc, const char *s)
342{
343 fdc->fdc_errs++;
344 if (s) {
345 if (fdc->fdc_errs < FDC_ERRMAX)
346 device_printf(fdc->fdc_dev, "%s", s);
347 else if (fdc->fdc_errs == FDC_ERRMAX)
348 device_printf(fdc->fdc_dev, "too many errors, not "
349 "logging any more\n");
350 }
351
352 return FD_FAILED;
353}
354
355/*
356 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
357 * Unit number,
358 * # of output bytes, output bytes as ints ...,
359 * # of input bytes, input bytes as ints ...
360 */
8c5c0470 361int
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362fd_cmd(struct fdc_data *fdc, int n_out, ...)
363{
364 u_char cmd;
365 int n_in;
366 int n;
e2565a42 367 __va_list ap;
984263bc 368
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369 __va_start(ap, n_out);
370 cmd = (u_char)(__va_arg(ap, int));
371 __va_end(ap);
372 __va_start(ap, n_out);
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373 for (n = 0; n < n_out; n++)
374 {
e2565a42 375 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
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376 {
377 char msg[50];
f8c7a42d 378 ksnprintf(msg, sizeof(msg),
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379 "cmd %x failed at out byte %d of %d\n",
380 cmd, n + 1, n_out);
381 return fdc_err(fdc, msg);
382 }
383 }
e2565a42 384 n_in = __va_arg(ap, int);
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385 for (n = 0; n < n_in; n++)
386 {
e2565a42 387 int *ptr = __va_arg(ap, int *);
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388 if (fd_in(fdc, ptr) < 0)
389 {
390 char msg[50];
f8c7a42d 391 ksnprintf(msg, sizeof(msg),
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392 "cmd %02x failed at in byte %d of %d\n",
393 cmd, n + 1, n_in);
394 return fdc_err(fdc, msg);
395 }
396 }
397
398 return 0;
399}
400
401static int
402enable_fifo(fdc_p fdc)
403{
404 int i, j;
405
406 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
407
408 /*
409 * XXX:
410 * Cannot use fd_cmd the normal way here, since
411 * this might be an invalid command. Thus we send the
412 * first byte, and check for an early turn of data directon.
413 */
414
415 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
416 return fdc_err(fdc, "Enable FIFO failed\n");
417
418 /* If command is invalid, return */
419 j = FDSTS_TIMEOUT;
420 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
421 != NE7_RQM && j-- > 0) {
422 if (i == (NE7_DIO | NE7_RQM)) {
423 fdc_reset(fdc);
424 return FD_FAILED;
425 }
426 DELAY(1);
427 }
428 if (j<0 ||
429 fd_cmd(fdc, 3,
430 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
431 fdc_reset(fdc);
432 return fdc_err(fdc, "Enable FIFO failed\n");
433 }
434 fdc->flags |= FDC_HAS_FIFO;
435 return 0;
436 }
437 if (fd_cmd(fdc, 4,
438 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
439 return fdc_err(fdc, "Re-enable FIFO failed\n");
440 return 0;
441}
442
443static int
444fd_sense_drive_status(fdc_p fdc, int *st3p)
445{
446 int st3;
447
448 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
449 {
450 return fdc_err(fdc, "Sense Drive Status failed\n");
451 }
452 if (st3p)
453 *st3p = st3;
454
455 return 0;
456}
457
458static int
459fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
460{
461 int cyl, st0, ret;
462
463 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
464 if (ret) {
465 (void)fdc_err(fdc,
466 "sense intr err reading stat reg 0\n");
467 return ret;
468 }
469
470 if (st0p)
471 *st0p = st0;
472
473 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
474 /*
475 * There doesn't seem to have been an interrupt.
476 */
477 return FD_NOT_VALID;
478 }
479
480 if (fd_in(fdc, &cyl) < 0) {
481 return fdc_err(fdc, "can't get cyl num\n");
482 }
483
484 if (cylp)
485 *cylp = cyl;
486
487 return 0;
488}
489
490
491static int
492fd_read_status(fdc_p fdc, int fdsu)
493{
494 int i, ret;
495
496 for (i = 0; i < 7; i++) {
497 /*
498 * XXX types are poorly chosen. Only bytes can by read
499 * from the hardware, but fdc->status[] wants u_ints and
500 * fd_in() gives ints.
501 */
502 int status;
503
504 ret = fd_in(fdc, &status);
505 fdc->status[i] = status;
506 if (ret != 0)
507 break;
508 }
509
510 if (ret == 0)
511 fdc->flags |= FDC_STAT_VALID;
512 else
513 fdc->flags &= ~FDC_STAT_VALID;
514
515 return ret;
516}
517
518/****************************************************************************/
519/* autoconfiguration stuff */
520/****************************************************************************/
521
8c5c0470 522int
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523fdc_alloc_resources(struct fdc_data *fdc)
524{
525 device_t dev;
526 int ispnp, ispcmcia;
527
528 dev = fdc->fdc_dev;
529 ispnp = (fdc->flags & FDC_ISPNP) != 0;
530 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
531 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
532 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
533
534 /*
535 * On standard ISA, we don't just use an 8 port range
536 * (e.g. 0x3f0-0x3f7) since that covers an IDE control
537 * register at 0x3f6.
538 *
539 * Isn't PC hardware wonderful.
540 *
541 * The Y-E Data PCMCIA FDC doesn't have this problem, it
542 * uses the register with offset 6 for pseudo-DMA, and the
543 * one with offset 7 as control register.
544 */
545 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
546 &fdc->rid_ioport, 0ul, ~0ul,
547 ispcmcia ? 8 : (ispnp ? 1 : 6),
548 RF_ACTIVE);
549 if (fdc->res_ioport == 0) {
550 device_printf(dev, "cannot reserve I/O port range\n");
551 return ENXIO;
552 }
553 fdc->portt = rman_get_bustag(fdc->res_ioport);
554 fdc->porth = rman_get_bushandle(fdc->res_ioport);
555
556 if (!ispcmcia) {
557 /*
558 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
559 * and some at 0x3f0-0x3f5,0x3f7. We detect the former
560 * by checking the size and adjust the port address
561 * accordingly.
562 */
563 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
564 fdc->port_off = -2;
565
566 /*
567 * Register the control port range as rid 1 if it
568 * isn't there already. Most PnP BIOSen will have
569 * already done this but non-PnP configurations don't.
570 *
571 * And some (!!) report 0x3f2-0x3f5 and completely
572 * leave out the control register! It seems that some
573 * non-antique controller chips have a different
574 * method of programming the transfer speed which
575 * doesn't require the control register, but it's
576 * mighty bogus as the chip still responds to the
577 * address for the control register.
578 */
579 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
580 u_long ctlstart;
581
582 /* Find the control port, usually 0x3f7 */
583 ctlstart = rman_get_start(fdc->res_ioport) +
584 fdc->port_off + 7;
585
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586 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1,
587 -1);
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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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MD
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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MD
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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MD
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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MD
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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MD
782 error = fdc_alloc_resources(fdc);
783 if (error) {
0ca0cd25 784 device_printf(dev, "cannot reacquire resources\n");
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MD
785 return error;
786 }
787 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
ee61f228 788 0, fdc_intr, fdc,
2c5c4bb9 789 &fdc->fdc_intr, NULL, NULL);
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MD
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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MD
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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MD
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),
984263bc
MD
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
aa2b9d05
SW
857DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, NULL, NULL);
858DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, NULL, NULL);
984263bc 859
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MD
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);
984263bc
MD
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;
984263bc
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");
984263bc
MD
999 fd->type = FD_720;
1000 break;
1001 default:
1002 return (ENXIO);
1003 }
983105c1 1004 fd->ft = fd_types[fd->type - 1];
984263bc
MD
1005 return (0);
1006}
1007
1008static int
1009fd_attach(device_t dev)
1010{
7ba1363d
MD
1011 struct disk_info info;
1012 struct fd_data *fd;
1013 struct fd_type *ft;
984263bc
MD
1014
1015 fd = device_get_softc(dev);
1016
983105c1 1017 disk_create(fd->fdu, &fd->disk, &fd_ops);
f5d8307c 1018 disk_setdisktype(&fd->disk, "floppy");
984263bc
MD
1019
1020 /*
983105c1
MD
1021 * Make special raw floppy devices with preset types to
1022 * make formatting easier. These override the disk management
1023 * layer for the whole-slice-disk for partitions 128-191. Note
1024 * that we do not override partition 255, which is the
1025 * whole-slice-part. If we did we would have to provide our
1026 * own DIOCGPART ioctl.
984263bc 1027 */
983105c1
MD
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
984263bc
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);
7ba1363d
MD
1053
1054 if (fd->type != NO_TYPE) {
1055 bzero(&info, sizeof(info));
1056 ft = &fd_types[fd->type - 1];
1057 info.d_media_blksize = 128 << ft->secsize;
1058 info.d_media_blocks = ft->size;
1059 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1060 info.d_nheads = ft->heads;
1061 info.d_secpertrack = ft->sectrac;
1062 info.d_secpercyl = ft->sectrac * ft->heads;
1063 info.d_ncylinders = ft->size / info.d_secpercyl;
1064 disk_setdiskinfo(&fd->disk, &info);
1065 }
984263bc
MD
1066 return (0);
1067}
1068
1069static int
1070fd_detach(device_t dev)
1071{
1072 struct fd_data *fd;
1073
1074 fd = device_get_softc(dev);
cd29885a
MD
1075 kprintf("devfs: Please make sure that only the right fd device was removed!!!\n");
1076 dev_ops_remove_minor(&fd_ops,
1077 /*dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),*/
983105c1
MD
1078 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128));
1079 disk_invalidate(&fd->disk);
1080 disk_destroy(&fd->disk);
1081 devstat_remove_entry(&fd->device_stats);
e8b273ff 1082 callout_stop(&fd->toffhandle);
4fc46503 1083 callout_stop(&fd->motor);
984263bc
MD
1084
1085 return (0);
1086}
1087
1088static device_method_t fd_methods[] = {
1089 /* Device interface */
1090 DEVMETHOD(device_probe, fd_probe),
1091 DEVMETHOD(device_attach, fd_attach),
1092 DEVMETHOD(device_detach, fd_detach),
1093 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1094 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1095 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1096
1097 { 0, 0 }
1098};
1099
1100static driver_t fd_driver = {
1101 "fd",
1102 fd_methods,
1103 sizeof(struct fd_data)
1104};
1105
aa2b9d05 1106DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, NULL, NULL);
984263bc
MD
1107
1108/****************************************************************************/
1109/* motor control stuff */
1110/* remember to not deselect the drive we're working on */
1111/****************************************************************************/
1112static void
1113set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1114{
1115 int fdout = fdc->fdout;
1116 int needspecify = 0;
1117
1118 if(turnon) {
1119 fdout &= ~FDO_FDSEL;
1120 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1121 } else
1122 fdout &= ~(FDO_MOEN0 << fdsu);
1123
1124 if(!turnon
1125 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1126 /* gonna turn off the last drive, put FDC to bed */
1127 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1128 else {
1129 /* make sure controller is selected and specified */
1130 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1131 needspecify = 1;
1132 fdout |= (FDO_FRST|FDO_FDMAEN);
1133 }
1134
1135 fdout_wr(fdc, fdout);
1136 fdc->fdout = fdout;
1137 TRACE1("[0x%x->FDOUT]", fdout);
1138
1139 if (needspecify) {
1140 /*
1141 * XXX
1142 * special case: since we have just woken up the FDC
1143 * from its sleep, we silently assume the command will
1144 * be accepted, and do not test for a timeout
1145 */
1146 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1147 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1148 0);
1149 if (fdc->flags & FDC_HAS_FIFO)
1150 (void) enable_fifo(fdc);
1151 }
1152}
1153
1154static void
1155fd_turnoff(void *xfd)
1156{
984263bc
MD
1157 fd_p fd = xfd;
1158
1159 TRACE1("[fd%d: turnoff]", fd->fdu);
1160
fbe276c7 1161 crit_enter();
984263bc
MD
1162 /*
1163 * Don't turn off the motor yet if the drive is active.
1164 *
1165 * If we got here, this could only mean we missed an interrupt.
1166 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1167 * after a controller reset. Just schedule a pseudo-interrupt
1168 * so the state machine gets re-entered.
1169 */
1170 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1171 fdc_intr(fd->fdc);
fbe276c7 1172 crit_exit();
984263bc
MD
1173 return;
1174 }
1175
1176 fd->flags &= ~FD_MOTOR;
1177 set_motor(fd->fdc, fd->fdsu, TURNOFF);
fbe276c7 1178 crit_exit();
984263bc
MD
1179}
1180
1181static void
1182fd_motor_on(void *xfd)
1183{
984263bc
MD
1184 fd_p fd = xfd;
1185
fbe276c7 1186 crit_enter();
984263bc
MD
1187 fd->flags &= ~FD_MOTOR_WAIT;
1188 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1189 {
1190 fdc_intr(fd->fdc);
1191 }
fbe276c7 1192 crit_exit();
984263bc
MD
1193}
1194
1195static void
1196fd_turnon(fd_p fd)
1197{
1198 if(!(fd->flags & FD_MOTOR))
1199 {
1200 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1201 set_motor(fd->fdc, fd->fdsu, TURNON);
4fc46503 1202 callout_reset(&fd->motor, hz, fd_motor_on, fd);
984263bc
MD
1203 }
1204}
1205
1206static void
1207fdc_reset(fdc_p fdc)
1208{
1209 /* Try a reset, keep motor on */
1210 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1211 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1212 DELAY(100);
1213 /* enable FDC, but defer interrupts a moment */
1214 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1215 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1216 DELAY(100);
1217 fdout_wr(fdc, fdc->fdout);
1218 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1219
1220 /* XXX after a reset, silently believe the FDC will accept commands */
1221 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1222 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1223 0);
1224 if (fdc->flags & FDC_HAS_FIFO)
1225 (void) enable_fifo(fdc);
1226}
1227
1228/****************************************************************************/
1229/* fdc in/out */
1230/****************************************************************************/
1231/*
1232 * FDC IO functions, take care of the main status register, timeout
1233 * in case the desired status bits are never set.
1234 *
1235 * These PIO loops initially start out with short delays between
1236 * each iteration in the expectation that the required condition
1237 * is usually met quickly, so it can be handled immediately. After
1238 * about 1 ms, stepping is increased to achieve a better timing
1239 * accuracy in the calls to DELAY().
1240 */
1241static int
1242fd_in(struct fdc_data *fdc, int *ptr)
1243{
1244 int i, j, step;
1245
1246 for (j = 0, step = 1;
1247 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1248 j < FDSTS_TIMEOUT;
1249 j += step) {
1250 if (i == NE7_RQM)
1251 return (fdc_err(fdc, "ready for output in input\n"));
1252 if (j == 1000)
1253 step = 1000;
1254 DELAY(step);
1255 }
1256 if (j >= FDSTS_TIMEOUT)
1257 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1258#ifdef FDC_DEBUG
1259 i = fddata_rd(fdc);
1260 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1261 *ptr = i;
1262 return (0);
1263#else /* !FDC_DEBUG */
1264 i = fddata_rd(fdc);
1265 if (ptr)
1266 *ptr = i;
1267 return (0);
1268#endif /* FDC_DEBUG */
1269}
1270
1271static int
1272out_fdc(struct fdc_data *fdc, int x)
1273{
1274 int i, j, step;
1275
1276 for (j = 0, step = 1;
1277 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1278 j < FDSTS_TIMEOUT;
1279 j += step) {
1280 if (i == (NE7_DIO|NE7_RQM))
1281 return (fdc_err(fdc, "ready for input in output\n"));
1282 if (j == 1000)
1283 step = 1000;
1284 DELAY(step);
1285 }
1286 if (j >= FDSTS_TIMEOUT)
1287 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1288
1289 /* Send the command and return */
1290 fddata_wr(fdc, x);
1291 TRACE1("[0x%x->FDDATA]", x);
1292 return (0);
1293}
1294
1295/****************************************************************************/
1296/* fdopen/fdclose */
1297/****************************************************************************/
1298int
fef8985e 1299Fdopen(struct dev_open_args *ap)
984263bc 1300{
b13267a5 1301 cdev_t dev = ap->a_head.a_dev;
983105c1
MD
1302 fdu_t fdu = dkunit(dev);
1303 struct disk_info info;
1304 struct fd_type *ft;
1305 int type;
1306 int changetype;
984263bc
MD
1307 fd_p fd;
1308 fdc_p fdc;
1309
1310 /* check bounds */
1311 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1312 return (ENXIO);
1313 fdc = fd->fdc;
1314 if ((fdc == NULL) || (fd->type == NO_TYPE))
1315 return (ENXIO);
983105c1
MD
1316
1317 /*
1318 * Figure out the type of floppy. There are special whole-disk-device
1319 * overrides that will override the current type.
1320 */
1321 type = dkpart(dev);
1322 if (type == WHOLE_SLICE_PART) {
1323 type = fd->type; /* do not change selected type data */
1324 changetype = 0;
1325 } else if (type > 128) {
1326 type -= 128; /* set to specific format */
1327 changetype = 1;
1328 } else {
1329 type = fd->type; /* reset to default */
1330 changetype = 1;
1331 }
984263bc
MD
1332 if (type > NUMDENS)
1333 return (ENXIO);
983105c1 1334 if (type != fd->type) {
984263bc
MD
1335 /*
1336 * For each type of basic drive, make sure we are trying
1337 * to open a type it can do,
1338 */
983105c1
MD
1339 switch (fd->type) {
1340 case FD_360:
1341 return (ENXIO);
1342 case FD_720:
1343 if ( type != FD_820
1344 && type != FD_800
1345 && type != FD_640
1346 )
984263bc 1347 return (ENXIO);
983105c1
MD
1348 break;
1349 case FD_1200:
1350 switch (type) {
1351 case FD_1480:
1352 type = FD_1480in5_25;
1353 break;
1354 case FD_1440:
1355 type = FD_1440in5_25;
1356 break;
1357 case FD_1232:
1358 break;
1359 case FD_820:
1360 type = FD_820in5_25;
1361 break;
1362 case FD_800:
1363 type = FD_800in5_25;
1364 break;
984263bc 1365 case FD_720:
983105c1 1366 type = FD_720in5_25;
984263bc 1367 break;
983105c1
MD
1368 case FD_640:
1369 type = FD_640in5_25;
984263bc 1370 break;
983105c1
MD
1371 case FD_360:
1372 type = FD_360in5_25;
984263bc 1373 break;
983105c1
MD
1374 default:
1375 return(ENXIO);
984263bc 1376 }
983105c1
MD
1377 break;
1378 case FD_1440:
1379 if ( type != FD_1720
1380 && type != FD_1480
1381 && type != FD_1200
1382 && type != FD_820
1383 && type != FD_800
1384 && type != FD_720
1385 && type != FD_640
1386 )
1387 return(ENXIO);
1388 break;
984263bc
MD
1389 }
1390 }
983105c1
MD
1391
1392 /*
1393 * fd->type is the basic drive type, not the current format
1394 * we are reading. We only change the type when opening the
1395 * whole-slice-partition
1396 */
1397 if (changetype)
1398 fd->ft = fd_types[type - 1];
984263bc 1399 fd->flags |= FD_OPEN;
983105c1 1400
984263bc
MD
1401 /*
1402 * Clearing the DMA overrun counter at open time is a bit messy.
1403 * Since we're only managing one counter per controller, opening
1404 * the second drive could mess it up. Anyway, if the DMA overrun
1405 * condition is really persistent, it will eventually time out
1406 * still. OTOH, clearing it here will ensure we'll at least start
1407 * trying again after a previous (maybe even long ago) failure.
1408 * Also, this is merely a stop-gap measure only that should not
1409 * happen during normal operation, so we can tolerate it to be a
1410 * bit sloppy about this.
1411 */
1412 fdc->dma_overruns = 0;
1413
983105c1
MD
1414 /*
1415 * Set disk parameters for the disk management layer.
1416 *
1417 * Note that we do not set RAWEXTENSIONS here. We override
1418 * the minor numbers in the raw-extension range and handle them
1419 * directly.
1420 */
1421 bzero(&info, sizeof(info));
1422 ft = &fd->ft;
1423 info.d_media_blksize = 128 << ft->secsize;
1424 info.d_media_blocks = ft->size;
1425 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1426 info.d_nheads = ft->heads;
1427 info.d_secpertrack = ft->sectrac;
1428 info.d_secpercyl = ft->sectrac * ft->heads;
1429 info.d_ncylinders = ft->size / info.d_secpercyl;
1430 disk_setdiskinfo(&fd->disk, &info);
1431
984263bc
MD
1432 return 0;
1433}
1434
1435int
fef8985e 1436fdclose(struct dev_close_args *ap)
984263bc 1437{
b13267a5 1438 cdev_t dev = ap->a_head.a_dev;
983105c1 1439 fdu_t fdu = dkunit(dev);
984263bc
MD
1440 struct fd_data *fd;
1441
1442 fd = devclass_get_softc(fd_devclass, fdu);
1443 fd->flags &= ~FD_OPEN;
1444 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1445
1446 return (0);
1447}
1448
1449/****************************************************************************/
1450/* fdstrategy */
1451/****************************************************************************/
fef8985e
MD
1452int
1453fdstrategy(struct dev_strategy_args *ap)
984263bc 1454{
b13267a5 1455 cdev_t dev = ap->a_head.a_dev;
fef8985e 1456 struct bio *bio = ap->a_bio;
81b5c339 1457 struct buf *bp = bio->bio_buf;
984263bc 1458 unsigned nblocks, blknum, cando;
984263bc
MD
1459 fdu_t fdu;
1460 fdc_p fdc;
1461 fd_p fd;
1462 size_t fdblk;
1463
983105c1 1464 fdu = dkunit(dev);
984263bc
MD
1465 fd = devclass_get_softc(fd_devclass, fdu);
1466 if (fd == 0)
1467 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
81b5c339 1468 (u_long)major(dev), (u_long)minor(dev));
984263bc
MD
1469 fdc = fd->fdc;
1470 if (fd->type == NO_TYPE) {
1471 bp->b_error = ENXIO;
1472 bp->b_flags |= B_ERROR;
1473 goto bad;
1474 };
1475
983105c1 1476 fdblk = 128 << (fd->ft.secsize);
10f3fee5 1477 if (bp->b_cmd != BUF_CMD_FORMAT) {
54078292 1478 if (bio->bio_offset < 0) {
e3869ec7 1479 kprintf(
664f5072 1480 "fd%d: fdstrat: bad request offset = %"PRId64", bcount = %d\n",
54078292 1481 fdu, bio->bio_offset, bp->b_bcount);
984263bc
MD
1482 bp->b_error = EINVAL;
1483 bp->b_flags |= B_ERROR;
1484 goto bad;
1485 }
1486 if ((bp->b_bcount % fdblk) != 0) {
1487 bp->b_error = EINVAL;
1488 bp->b_flags |= B_ERROR;
1489 goto bad;
1490 }
1491 }
1492
1493 /*
1494 * Set up block calculations.
1495 */
54078292 1496 if (bio->bio_offset > 20000000LL * fdblk) {
984263bc
MD
1497 /*
1498 * Reject unreasonably high block number, prevent the
1499 * multiplication below from overflowing.
1500 */
1501 bp->b_error = EINVAL;
1502 bp->b_flags |= B_ERROR;
1503 goto bad;
1504 }
54078292 1505 blknum = (unsigned)(bio->bio_offset / fdblk);
983105c1 1506 nblocks = fd->ft.size;
984263bc
MD
1507 bp->b_resid = 0;
1508 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1509 if (blknum <= nblocks) {
1510 cando = (nblocks - blknum) * fdblk;
1511 bp->b_resid = bp->b_bcount - cando;
1512 if (cando == 0)
1513 goto bad; /* not actually bad but EOF */
1514 } else {
1515 bp->b_error = EINVAL;
1516 bp->b_flags |= B_ERROR;
1517 goto bad;
1518 }
1519 }
fbe276c7 1520 crit_enter();
81b5c339
MD
1521 bio->bio_driver_info = dev;
1522 bioqdisksort(&fdc->bio_queue, bio);
e8b273ff 1523 callout_stop(&fd->toffhandle);
984263bc
MD
1524
1525 /* Tell devstat we are starting on the transaction */
1526 devstat_start_transaction(&fd->device_stats);
cfa47be2 1527#if 0
984263bc 1528 device_busy(fd->dev);
cfa47be2 1529#endif
984263bc 1530 fdstart(fdc);
fbe276c7 1531 crit_exit();
fef8985e 1532 return(0);
984263bc
MD
1533
1534bad:
81b5c339 1535 biodone(bio);
fef8985e 1536 return(0);
984263bc
MD
1537}
1538
1539/***************************************************************\
1540* fdstart *
1541* We have just queued something.. if the controller is not busy *
1542* then simulate the case where it has just finished a command *
1543* So that it (the interrupt routine) looks on the queue for more*
1544* work to do and picks up what we just added. *
1545* If the controller is already busy, we need do nothing, as it *
1546* will pick up our work when the present work completes *
1547\***************************************************************/
1548static void
1549fdstart(struct fdc_data *fdc)
1550{
fbe276c7 1551 crit_enter();
984263bc
MD
1552 if(fdc->state == DEVIDLE)
1553 {
1554 fdc_intr(fdc);
1555 }
fbe276c7 1556 crit_exit();
984263bc
MD
1557}
1558
1559static void
1560fd_iotimeout(void *xfdc)
1561{
1562 fdc_p fdc;
984263bc
MD
1563
1564 fdc = xfdc;
1565 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1566
1567 /*
1568 * Due to IBM's brain-dead design, the FDC has a faked ready
1569 * signal, hardwired to ready == true. Thus, any command
1570 * issued if there's no diskette in the drive will _never_
1571 * complete, and must be aborted by resetting the FDC.
1572 * Many thanks, Big Blue!
1573 * The FDC must not be reset directly, since that would
1574 * interfere with the state machine. Instead, pretend that
1575 * the command completed but was invalid. The state machine
1576 * will reset the FDC and retry once.
1577 */
fbe276c7 1578 crit_enter();
984263bc
MD
1579 fdc->status[0] = NE7_ST0_IC_IV;
1580 fdc->flags &= ~FDC_STAT_VALID;
1581 fdc->state = IOTIMEDOUT;
1582 fdc_intr(fdc);
fbe276c7 1583 crit_exit();
984263bc
MD
1584}
1585
fbe276c7 1586/* just ensure it is running in a critical section */
984263bc
MD
1587static void
1588fd_pseudointr(void *xfdc)
1589{
fbe276c7 1590 crit_enter();
984263bc 1591 fdc_intr(xfdc);
fbe276c7 1592 crit_exit();
984263bc
MD
1593}
1594
1595/***********************************************************************\
1596* fdintr *
1597* keep calling the state machine until it returns a 0 *
1598* ALWAYS called at SPLBIO *
1599\***********************************************************************/
1600static void
1601fdc_intr(void *xfdc)
1602{
1603 fdc_p fdc = xfdc;
1604 while(fdstate(fdc))
1605 ;
1606}
1607
1608/*
1609 * magic pseudo-DMA initialization for YE FDC. Sets count and
1610 * direction
1611 */
1612#define SET_BCDR(fdc,wr,cnt,port) \
1613 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1614 ((cnt)-1) & 0xff); \
1615 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1616 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1617
1618/*
1619 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1620 */
10f3fee5 1621static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
984263bc
MD
1622{
1623 u_char *cptr = (u_char *)addr;
1624
10f3fee5 1625 if (cmd == BUF_CMD_READ) {
984263bc
MD
1626 if (fdc->state != PIOREAD) {
1627 fdc->state = PIOREAD;
1628 return(0);
1629 };
1630 SET_BCDR(fdc, 0, count, 0);
1631 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1632 FDC_YE_DATAPORT, cptr, count);
1633 } else {
1634 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1635 FDC_YE_DATAPORT, cptr, count);
1636 SET_BCDR(fdc, 0, count, 0);
1637 };
1638 return(1);
1639}
1640
1641/***********************************************************************\
1642* The controller state machine. *
1643* if it returns a non zero value, it should be called again immediatly *
1644\***********************************************************************/
1645static int
1646fdstate(fdc_p fdc)
1647{
1648 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1649 unsigned blknum = 0, b_cylinder = 0;
c755a6ff 1650 fdu_t fdu;
984263bc 1651 fd_p fd;
81b5c339 1652 struct bio *bio;
3a1b0fdc 1653 struct buf *bp;
984263bc
MD
1654 struct fd_formb *finfo = NULL;
1655 size_t fdblk;
b13267a5 1656 cdev_t dev;
81b5c339
MD
1657
1658 bio = fdc->bio;
1659 if (bio == NULL) {
1660 bio = bioq_first(&fdc->bio_queue);
1661 if (bio != NULL) {
1662 bioq_remove(&fdc->bio_queue, bio);
1663 fdc->bio = bio;
984263bc
MD
1664 }
1665 }
81b5c339 1666 if (bio == NULL) {
984263bc
MD
1667 /***********************************************\
1668 * nothing left for this controller to do *
1669 * Force into the IDLE state, *
1670 \***********************************************/
1671 fdc->state = DEVIDLE;
1672 if (fdc->fd) {
1673 device_printf(fdc->fdc_dev,
1674 "unexpected valid fd pointer\n");
1675 fdc->fd = (fd_p) 0;
1676 fdc->fdu = -1;
1677 }
1678 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1679 return (0);
1680 }
81b5c339
MD
1681 bp = bio->bio_buf;
1682 dev = bio->bio_driver_info;
1683
983105c1 1684 fdu = dkunit(dev);
984263bc 1685 fd = devclass_get_softc(fd_devclass, fdu);
983105c1 1686 fdblk = 128 << fd->ft.secsize;
984263bc
MD
1687 if (fdc->fd && (fd != fdc->fd))
1688 device_printf(fd->dev, "confused fd pointers\n");
10f3fee5
MD
1689 read = (bp->b_cmd == BUF_CMD_READ);
1690 format = (bp->b_cmd == BUF_CMD_FORMAT);
984263bc
MD
1691 if (format) {
1692 finfo = (struct fd_formb *)bp->b_data;
1693 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1694 - (char *)finfo;
1695 }
1696 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
54078292
MD
1697 blknum = (unsigned)(bio->bio_offset / fdblk) +
1698 fd->skip /fdblk;
983105c1 1699 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads);
984263bc
MD
1700 }
1701 TRACE1("fd%d", fdu);
1702 TRACE1("[%s]", fdstates[fdc->state]);
1703 TRACE1("(0x%x)", fd->flags);
e8b273ff 1704 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
984263bc
MD
1705 switch (fdc->state)
1706 {
1707 case DEVIDLE:
1708 case FINDWORK: /* we have found new work */
1709 fdc->retry = 0;
1710 fd->skip = 0;
1711 fdc->fd = fd;
1712 fdc->fdu = fdu;
983105c1
MD
1713 fdc->fdctl_wr(fdc, fd->ft.trans);
1714 TRACE1("[0x%x->FDCTL]", fd->ft.trans);
984263bc
MD
1715 /*******************************************************\
1716 * If the next drive has a motor startup pending, then *
1717 * it will start up in its own good time *
1718 \*******************************************************/
1719 if(fd->flags & FD_MOTOR_WAIT) {
1720 fdc->state = MOTORWAIT;
1721 return (0); /* come back later */
1722 }
1723 /*******************************************************\
1724 * Maybe if it's not starting, it SHOULD be starting *
1725 \*******************************************************/
1726 if (!(fd->flags & FD_MOTOR))
1727 {
1728 fdc->state = MOTORWAIT;
1729 fd_turnon(fd);
1730 return (0);
1731 }
1732 else /* at least make sure we are selected */
1733 {
1734 set_motor(fdc, fd->fdsu, TURNON);
1735 }
1736 if (fdc->flags & FDC_NEEDS_RESET) {
1737 fdc->state = RESETCTLR;
1738 fdc->flags &= ~FDC_NEEDS_RESET;
1739 } else
1740 fdc->state = DOSEEK;
1741 break;
1742 case DOSEEK:
1743 if (b_cylinder == (unsigned)fd->track)
1744 {
1745 fdc->state = SEEKCOMPLETE;
1746 break;
1747 }
1748 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
983105c1 1749 fd->fdsu, b_cylinder * fd->ft.steptrac,
984263bc
MD
1750 0))
1751 {
1752 /*
1753 * seek command not accepted, looks like
1754 * the FDC went off to the Saints...
1755 */
1756 fdc->retry = 6; /* try a reset */
1757 return(retrier(fdc));
1758 }
1759 fd->track = FD_NO_TRACK;
1760 fdc->state = SEEKWAIT;
1761 return(0); /* will return later */
1762 case SEEKWAIT:
1763 /* allow heads to settle */
4fc46503
JS
1764 callout_reset(&fdc->pseudointr_ch, hz / 16,
1765 fd_pseudointr, fdc);
984263bc
MD
1766 fdc->state = SEEKCOMPLETE;
1767 return(0); /* will return later */
1768 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1769 /* Make sure seek really happened*/
1770 if(fd->track == FD_NO_TRACK) {
983105c1 1771 int descyl = b_cylinder * fd->ft.steptrac;
984263bc
MD
1772 do {
1773 /*
1774 * This might be a "ready changed" interrupt,
1775 * which cannot really happen since the
1776 * RDY pin is hardwired to + 5 volts. This
1777 * generally indicates a "bouncing" intr
1778 * line, so do one of the following:
1779 *
1780 * When running on an enhanced FDC that is
1781 * known to not go stuck after responding
1782 * with INVALID, fetch all interrupt states
1783 * until seeing either an INVALID or a
1784 * real interrupt condition.
1785 *
1786 * When running on a dumb old NE765, give
1787 * up immediately. The controller will
1788 * provide up to four dummy RC interrupt
1789 * conditions right after reset (for the
1790 * corresponding four drives), so this is
1791 * our only chance to get notice that it
1792 * was not the FDC that caused the interrupt.
1793 */
1794 if (fd_sense_int(fdc, &st0, &cyl)
1795 == FD_NOT_VALID)
1796 return 0;
1797 if(fdc->fdct == FDC_NE765
1798 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1799 return 0; /* hope for a real intr */
1800 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1801
1802 if (0 == descyl) {
1803 int failed = 0;
1804 /*
1805 * seek to cyl 0 requested; make sure we are
1806 * really there
1807 */
1808 if (fd_sense_drive_status(fdc, &st3))
1809 failed = 1;
1810 if ((st3 & NE7_ST3_T0) == 0) {
e3869ec7 1811 kprintf(
984263bc
MD
1812 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1813 fdu, st3, NE7_ST3BITS);
1814 failed = 1;
1815 }
1816
1817 if (failed) {
1818 if(fdc->retry < 3)
1819 fdc->retry = 3;
1820 return (retrier(fdc));
1821 }
1822 }
1823
1824 if (cyl != descyl) {
e3869ec7 1825 kprintf(
984263bc
MD
1826 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1827 fdu, descyl, cyl, st0);
1828 if (fdc->retry < 3)
1829 fdc->retry = 3;
1830 return (retrier(fdc));
1831 }
1832 }
1833
1834 fd->track = b_cylinder;
10f3fee5
MD
1835 if (!(fdc->flags & FDC_NODMA)) {
1836 isa_dmastart(isa_dmabp(bp),
1837 bp->b_data+fd->skip,
984263bc 1838 format ? bp->b_bcount : fdblk, fdc->dmachan);
10f3fee5 1839 }
983105c1
MD
1840 sectrac = fd->ft.sectrac;
1841 sec = blknum % (sectrac * fd->ft.heads);
984263bc
MD
1842 head = sec / sectrac;
1843 sec = sec % sectrac + 1;
1844 fd->hddrv = ((head&1)<<2)+fdu;
1845
1846 if(format || !read)
1847 {
1848 /* make sure the drive is writable */
1849 if(fd_sense_drive_status(fdc, &st3) != 0)
1850 {
1851 /* stuck controller? */
1852 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1853 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1854 bp->b_data + fd->skip,
1855 format ? bp->b_bcount : fdblk,
1856 fdc->dmachan);
1857 fdc->retry = 6; /* reset the beast */
1858 return (retrier(fdc));
1859 }
1860 if(st3 & NE7_ST3_WP)
1861 {
1862 /*
1863 * XXX YES! this is ugly.
1864 * in order to force the current operation
1865 * to fail, we will have to fake an FDC
1866 * error - all error handling is done
1867 * by the retrier()
1868 */
1869 fdc->status[0] = NE7_ST0_IC_AT;
1870 fdc->status[1] = NE7_ST1_NW;
1871 fdc->status[2] = 0;
1872 fdc->status[3] = fd->track;
1873 fdc->status[4] = head;
1874 fdc->status[5] = sec;
1875 fdc->retry = 8; /* break out immediately */
1876 fdc->state = IOTIMEDOUT; /* not really... */
1877 return (1);
1878 }
1879 }
1880
1881 if (format) {
1882 if (fdc->flags & FDC_NODMA) {
1883 /*
1884 * This seems to be necessary for
1885 * whatever obscure reason; if we omit
1886 * it, we end up filling the sector ID
1887 * fields of the newly formatted track
1888 * entirely with garbage, causing
1889 * `wrong cylinder' errors all over
1890 * the place when trying to read them
1891 * back.
1892 *
1893 * Umpf.
1894 */
1895 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1896
10f3fee5 1897 (void)fdcpio(fdc,bp->b_cmd,
984263bc
MD
1898 bp->b_data+fd->skip,
1899 bp->b_bcount);
1900
1901 }
1902 /* formatting */
1903 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1904 finfo->fd_formb_secshift,
1905 finfo->fd_formb_nsecs,
1906 finfo->fd_formb_gaplen,
1907 finfo->fd_formb_fillbyte, 0)) {
1908 /* controller fell over */
1909 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1910 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1911 bp->b_data + fd->skip,
1912 format ? bp->b_bcount : fdblk,
1913 fdc->dmachan);
1914 fdc->retry = 6;
1915 return (retrier(fdc));
1916 }
1917 } else {
1918 if (fdc->flags & FDC_NODMA) {
1919 /*
1920 * this seems to be necessary even when
1921 * reading data
1922 */
1923 SET_BCDR(fdc, 1, fdblk, 0);
1924
1925 /*
1926 * perform the write pseudo-DMA before
1927 * the WRITE command is sent
1928 */
1929 if (!read)
10f3fee5 1930 (void)fdcpio(fdc,bp->b_cmd,
984263bc
MD
1931 bp->b_data+fd->skip,
1932 fdblk);
1933 }
1934 if (fd_cmd(fdc, 9,
1935 (read ? NE7CMD_READ : NE7CMD_WRITE),
1936 head << 2 | fdu, /* head & unit */
1937 fd->track, /* track */
1938 head,
1939 sec, /* sector + 1 */
983105c1 1940 fd->ft.secsize, /* sector size */
984263bc 1941 sectrac, /* sectors/track */
983105c1
MD
1942 fd->ft.gap, /* gap size */
1943 fd->ft.datalen, /* data length */
984263bc
MD
1944 0)) {
1945 /* the beast is sleeping again */
1946 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1947 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1948 bp->b_data + fd->skip,
1949 format ? bp->b_bcount : fdblk,
1950 fdc->dmachan);
1951 fdc->retry = 6;
1952 return (retrier(fdc));
1953 }
1954 }
1955 if (fdc->flags & FDC_NODMA)
1956 /*
1957 * if this is a read, then simply await interrupt
1958 * before performing PIO
1959 */
10f3fee5 1960 if (read && !fdcpio(fdc,bp->b_cmd,
984263bc 1961 bp->b_data+fd->skip,fdblk)) {
e8b273ff
MD
1962 callout_reset(&fd->tohandle, hz,
1963 fd_iotimeout, fdc);
984263bc
MD
1964 return(0); /* will return later */
1965 };
1966
1967 /*
1968 * write (or format) operation will fall through and
1969 * await completion interrupt
1970 */
1971 fdc->state = IOCOMPLETE;
e8b273ff 1972 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
984263bc
MD
1973 return (0); /* will return later */
1974 case PIOREAD:
1975 /*
1976 * actually perform the PIO read. The IOCOMPLETE case
1977 * removes the timeout for us.
1978 */
10f3fee5 1979 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
984263bc
MD
1980 fdc->state = IOCOMPLETE;
1981 /* FALLTHROUGH */
1982 case IOCOMPLETE: /* IO DONE, post-analyze */
e8b273ff 1983 callout_stop(&fd->tohandle);
984263bc
MD
1984
1985 if (fd_read_status(fdc, fd->fdsu)) {
10f3fee5
MD
1986 if (!(fdc->flags & FDC_NODMA)) {
1987 isa_dmadone(isa_dmabp(bp),
1988 bp->b_data + fd->skip,
984263bc
MD
1989 format ? bp->b_bcount : fdblk,
1990 fdc->dmachan);
10f3fee5 1991 }
984263bc
MD
1992 if (fdc->retry < 6)
1993 fdc->retry = 6; /* force a reset */
1994 return (retrier(fdc));
1995 }
1996
1997 fdc->state = IOTIMEDOUT;
1998
1999 /* FALLTHROUGH */
2000
2001 case IOTIMEDOUT:
10f3fee5
MD
2002 if (!(fdc->flags & FDC_NODMA)) {
2003 isa_dmadone(isa_dmabp(bp),
2004 bp->b_data + fd->skip,
984263bc 2005 format ? bp->b_bcount : fdblk, fdc->dmachan);
10f3fee5 2006 }
984263bc
MD
2007 if (fdc->status[0] & NE7_ST0_IC) {
2008 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2009 && fdc->status[1] & NE7_ST1_OR) {
2010 /*
2011 * DMA overrun. Someone hogged the bus and
2012 * didn't release it in time for the next
2013 * FDC transfer.
2014 *
2015 * We normally restart this without bumping
2016 * the retry counter. However, in case
2017 * something is seriously messed up (like
2018 * broken hardware), we rather limit the
2019 * number of retries so the IO operation
2020 * doesn't block indefinately.
2021 */
2022 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
2023 fdc->state = SEEKCOMPLETE;
2024 return (1);
2025 } /* else fall through */
2026 }
2027 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
2028 && fdc->retry < 6)
2029 fdc->retry = 6; /* force a reset */
2030 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2031 && fdc->status[2] & NE7_ST2_WC
2032 && fdc->retry < 3)
2033 fdc->retry = 3; /* force recalibrate */
2034 return (retrier(fdc));
2035 }
2036 /* All OK */
2037 /* Operation successful, retry DMA overruns again next time. */
2038 fdc->dma_overruns = 0;
2039 fd->skip += fdblk;
2040 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
2041 /* set up next transfer */
2042 fdc->state = DOSEEK;
2043 } else {
2044 /* ALL DONE */
2045 fd->skip = 0;
81b5c339 2046 fdc->bio = NULL;
cfa47be2 2047#if 0
984263bc 2048 device_unbusy(fd->dev);
cfa47be2 2049#endif
984263bc 2050 devstat_end_transaction_buf(&fd->device_stats, bp);
81b5c339 2051 biodone(bio);
984263bc
MD
2052 fdc->fd = (fd_p) 0;
2053 fdc->fdu = -1;
2054 fdc->state = FINDWORK;
2055 }
2056 return (1);
2057 case RESETCTLR:
2058 fdc_reset(fdc);
2059 fdc->retry++;
2060 fdc->state = RESETCOMPLETE;
2061 return (0);
2062 case RESETCOMPLETE:
2063 /*
2064 * Discard all the results from the reset so that they
2065 * can't cause an unexpected interrupt later.
2066 */
2067 for (i = 0; i < 4; i++)
2068 (void)fd_sense_int(fdc, &st0, &cyl);
2069 fdc->state = STARTRECAL;
2070 /* Fall through. */
2071 case STARTRECAL:
2072 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
2073 /* arrgl */
2074 fdc->retry = 6;
2075 return (retrier(fdc));
2076 }
2077 fdc->state = RECALWAIT;
2078 return (0); /* will return later */
2079 case RECALWAIT:
2080 /* allow heads to settle */
4fc46503 2081 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
984263bc
MD
2082 fdc->state = RECALCOMPLETE;
2083 return (0); /* will return later */
2084 case RECALCOMPLETE:
2085 do {
2086 /*
2087 * See SEEKCOMPLETE for a comment on this:
2088 */
2089 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2090 return 0;
2091 if(fdc->fdct == FDC_NE765
2092 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2093 return 0; /* hope for a real intr */
2094 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2095 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2096 {
2097 if(fdc->retry > 3)
2098 /*
2099 * a recalibrate from beyond cylinder 77
2100 * will "fail" due to the FDC limitations;
2101 * since people used to complain much about
2102 * the failure message, try not logging
2103 * this one if it seems to be the first
2104 * time in a line
2105 */
e3869ec7 2106 kprintf("fd%d: recal failed ST0 %b cyl %d\n",
984263bc
MD
2107 fdu, st0, NE7_ST0BITS, cyl);
2108 if(fdc->retry < 3) fdc->retry = 3;
2109 return (retrier(fdc));
2110 }
2111 fd->track = 0;
2112 /* Seek (probably) necessary */
2113 fdc->state = DOSEEK;
2114 return (1); /* will return immediatly */
2115 case MOTORWAIT:
2116 if(fd->flags & FD_MOTOR_WAIT)
2117 {
2118 return (0); /* time's not up yet */
2119 }
2120 if (fdc->flags & FDC_NEEDS_RESET) {
2121 fdc->state = RESETCTLR;
2122 fdc->flags &= ~FDC_NEEDS_RESET;
2123 } else {
2124 /*
2125 * If all motors were off, then the controller was
2126 * reset, so it has lost track of the current
2127 * cylinder. Recalibrate to handle this case.
2128 * But first, discard the results of the reset.
2129 */
2130 fdc->state = RESETCOMPLETE;
2131 }
2132 return (1); /* will return immediatly */
2133 default:
2134 device_printf(fdc->fdc_dev, "unexpected FD int->");
2135 if (fd_read_status(fdc, fd->fdsu) == 0)
e3869ec7 2136 kprintf("FDC status :%x %x %x %x %x %x %x ",
984263bc
MD
2137 fdc->status[0],
2138 fdc->status[1],
2139 fdc->status[2],
2140 fdc->status[3],
2141 fdc->status[4],
2142 fdc->status[5],
2143 fdc->status[6] );
2144 else
e3869ec7 2145 kprintf("No status available ");
984263bc
MD
2146 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2147 {
e3869ec7 2148 kprintf("[controller is dead now]\n");
984263bc
MD
2149 return (0);
2150 }
e3869ec7 2151 kprintf("ST0 = %x, PCN = %x\n", st0, cyl);
984263bc
MD
2152 return (0);
2153 }
2154 /*XXX confusing: some branches return immediately, others end up here*/
2155 return (1); /* Come back immediatly to new state */
2156}
2157
2158static int
2159retrier(struct fdc_data *fdc)
2160{
81b5c339 2161 struct bio *bio;
3a1b0fdc 2162 struct buf *bp;
984263bc 2163 struct fd_data *fd;
b13267a5 2164 cdev_t dev;
984263bc
MD
2165 int fdu;
2166
81b5c339
MD
2167 bio = fdc->bio;
2168 bp = bio->bio_buf;
2169 dev = bio->bio_driver_info;
984263bc
MD
2170
2171 /* XXX shouldn't this be cached somewhere? */
983105c1 2172 fdu = dkunit(dev);
984263bc
MD
2173 fd = devclass_get_softc(fd_devclass, fdu);
2174 if (fd->options & FDOPT_NORETRY)
2175 goto fail;
2176
2177 switch (fdc->retry) {
2178 case 0: case 1: case 2:
2179 fdc->state = SEEKCOMPLETE;
2180 break;
2181 case 3: case 4: case 5:
2182 fdc->state = STARTRECAL;
2183 break;
2184 case 6:
2185 fdc->state = RESETCTLR;
2186 break;
2187 case 7:
2188 break;
2189 default:
2190 fail:
2191 {
2192 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
984263bc 2193
e4c9c0c8 2194 if (printerror) {
ee3ad2c9
MD
2195 /*
2196 * note: use the correct device for more
2197 * verbose error reporting.
2198 */
983105c1 2199 diskerr(bio, dev,
ee3ad2c9 2200 "hard error", LOG_PRINTF,
a688b15c 2201 fdc->fd->skip);
e4c9c0c8 2202 }
984263bc
MD
2203 if (printerror) {
2204 if (fdc->flags & FDC_STAT_VALID)
e3869ec7 2205 kprintf(
984263bc
MD
2206 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2207 fdc->status[0], NE7_ST0BITS,
2208 fdc->status[1], NE7_ST1BITS,
2209 fdc->status[2], NE7_ST2BITS,
2210 fdc->status[3], fdc->status[4],
2211 fdc->status[5]);
2212 else
e3869ec7 2213 kprintf(" (No status)\n");
984263bc
MD
2214 }
2215 }
2216 bp->b_flags |= B_ERROR;
2217 bp->b_error = EIO;
2218 bp->b_resid += bp->b_bcount - fdc->fd->skip;
81b5c339 2219 fdc->bio = NULL;
984263bc 2220 fdc->fd->skip = 0;
cfa47be2 2221#if 0
984263bc 2222 device_unbusy(fd->dev);
cfa47be2 2223#endif
984263bc 2224 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
81b5c339 2225 biodone(bio);
984263bc
MD
2226 fdc->state = FINDWORK;
2227 fdc->flags |= FDC_NEEDS_RESET;
2228 fdc->fd = (fd_p) 0;
2229 fdc->fdu = -1;
2230 return (1);
2231 }
2232 fdc->retry++;
2233 return (1);
2234}
2235
2236static int
b13267a5 2237fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred)
984263bc
MD
2238{
2239 fdu_t fdu;
2240 fd_p fd;
984263bc 2241 struct buf *bp;
fbe276c7 2242 int rv = 0;
984263bc
MD
2243 size_t fdblk;
2244
983105c1 2245 fdu = dkunit(dev);
984263bc 2246 fd = devclass_get_softc(fd_devclass, fdu);
983105c1 2247 fdblk = 128 << fd->ft.secsize;
984263bc
MD
2248
2249 /* set up a buffer header for fdstrategy() */
014958fd 2250 bp = getpbuf(NULL);
10f3fee5 2251 bp->b_cmd = BUF_CMD_FORMAT;
984263bc
MD
2252
2253 /*
2254 * calculate a fake blkno, so fdstrategy() would initiate a
2255 * seek to the requested cylinder
2256 */
54078292 2257 bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
983105c1
MD
2258 (fd->ft.sectrac * fd->ft.heads)
2259 + finfo->head * fd->ft.sectrac) * fdblk;
81b5c339 2260 bp->b_bio1.bio_driver_info = dev;
ae8e83e6
MD
2261 bp->b_bio1.bio_flags |= BIO_SYNC;
2262 bp->b_bio1.bio_done = biodone_sync;
984263bc
MD
2263
2264 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2265 bp->b_data = (caddr_t)finfo;
2266
2267 /* now do the format */
81b5c339 2268 dev_dstrategy(dev, &bp->b_bio1);
984263bc
MD
2269
2270 /* ...and wait for it to complete */
ae8e83e6 2271 rv = biowait_timeout(&bp->b_bio1, "fdform", 20 * hz);
984263bc
MD
2272 if (rv == EWOULDBLOCK) {
2273 /* timed out */
2274 rv = EIO;
cfa47be2 2275#if 0
984263bc 2276 device_unbusy(fd->dev);
cfa47be2 2277#endif
81b5c339 2278 biodone(&bp->b_bio1);
984263bc
MD
2279 }
2280 if (bp->b_flags & B_ERROR)
2281 rv = bp->b_error;
2282 /*
2283 * allow the process to be swapped
2284 */
014958fd 2285 relpbuf(bp, NULL);
984263bc
MD
2286 return rv;
2287}
2288
2289/*
2290 * TODO: don't allocate buffer on stack.
2291 */
2292
2293static int
fef8985e 2294fdioctl(struct dev_ioctl_args *ap)
984263bc 2295{
b13267a5 2296 cdev_t dev = ap->a_head.a_dev;
983105c1 2297 fdu_t fdu = dkunit(dev);
984263bc 2298 fd_p fd = devclass_get_softc(fd_devclass, fdu);
984263bc 2299 struct fdc_status *fsp;
984263bc
MD
2300 int error = 0;
2301
fef8985e 2302 switch (ap->a_cmd) {
984263bc 2303 case FD_FORM:
fef8985e 2304 if ((ap->a_fflag & FWRITE) == 0)
984263bc 2305 error = EBADF; /* must be opened for writing */
fef8985e 2306 else if (((struct fd_formb *)ap->a_data)->format_version !=
984263bc
MD
2307 FD_FORMAT_VERSION)
2308 error = EINVAL; /* wrong version of formatting prog */
2309 else
fef8985e 2310 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred);
984263bc
MD
2311 break;
2312
2313 case FD_GTYPE: /* get drive type */
983105c1 2314 *(struct fd_type *)ap->a_data = fd->ft;
984263bc
MD
2315 break;
2316
2317 case FD_STYPE: /* set drive type */
2318 /* this is considered harmful; only allow for superuser */
895c1f85 2319 if (priv_check_cred(ap->a_cred, PRIV_ROOT, 0) != 0)
984263bc 2320 return EPERM;
983105c1 2321 fd->ft = *(struct fd_type *)ap->a_data;
984263bc
MD
2322 break;
2323
2324 case FD_GOPTS: /* get drive options */
fef8985e 2325 *(int *)ap->a_data = fd->options;
984263bc
MD
2326 break;
2327
2328 case FD_SOPTS: /* set drive options */
fef8985e 2329 fd->options = *(int *)ap->a_data;
984263bc
MD
2330 break;
2331
2332 case FD_GSTAT:
fef8985e 2333 fsp = (struct fdc_status *)ap->a_data;
984263bc
MD
2334 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2335 return EINVAL;
2336 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2337 break;
2338
2339 default:
2340 error = ENOTTY;
2341 break;
2342 }
2343 return (error);
2344}
2345
2346/*
2347 * Hello emacs, these are the
2348 * Local Variables:
2349 * c-indent-level: 8
2350 * c-continued-statement-offset: 8
2351 * c-continued-brace-offset: 0
2352 * c-brace-offset: -8
2353 * c-brace-imaginary-offset: 0
2354 * c-argdecl-indent: 8
2355 * c-label-offset: -8
2356 * c++-hanging-braces: 1
2357 * c++-access-specifier-offset: -8
2358 * c++-empty-arglist-indent: 8
2359 * c++-friend-offset: 0
2360 * End:
2361 */