Fix a bug in recent commits. When creating a virgin disk label for devices
[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 $
5350e1e9 54 * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.38 2007/05/19 00:52:00 dillon Exp $
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55 *
56 */
57
58#include "opt_fdc.h"
666d2603 59#include "use_pccard.h"
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60
61#include <sys/param.h>
62#include <sys/systm.h>
fabb8ceb 63#include <sys/bootmaj.h>
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64#include <sys/kernel.h>
65#include <sys/buf.h>
66#include <sys/bus.h>
67#include <sys/conf.h>
5350e1e9 68#include <sys/diskslice.h>
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69#include <sys/disklabel.h>
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>
75#include <sys/syslog.h>
335dda38 76#include <sys/device.h>
984263bc 77#include <sys/bus.h>
984263bc 78#include <sys/rman.h>
3020e3be 79#include <sys/buf2.h>
fbe276c7 80#include <sys/thread2.h>
3020e3be 81
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82#include <machine/clock.h>
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...) */
185 struct fd_type *ft; /* pointer to the type descriptor */
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;
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199 struct devstat device_stats;
200 device_t dev;
201 fdu_t fdu;
202};
203
204struct fdc_ivars {
205 int fdunit;
206};
207static devclass_t fd_devclass;
208
209/***********************************************************************\
210* Throughout this file the following conventions will be used: *
211* fd is a pointer to the fd_data struct for the drive in question *
212* fdc is a pointer to the fdc_data struct for the controller *
213* fdu is the floppy drive unit number *
214* fdcu is the floppy controller unit number *
215* fdsu is the floppy drive unit number on that controller. (sub-unit) *
216\***********************************************************************/
217
218/* internal functions */
219static void fdc_intr(void *);
220static void set_motor(struct fdc_data *, int, int);
221# define TURNON 1
222# define TURNOFF 0
223static timeout_t fd_turnoff;
224static timeout_t fd_motor_on;
225static void fd_turnon(struct fd_data *);
226static void fdc_reset(fdc_p);
227static int fd_in(struct fdc_data *, int *);
228static int out_fdc(struct fdc_data *, int);
229static void fdstart(struct fdc_data *);
230static timeout_t fd_iotimeout;
231static timeout_t fd_pseudointr;
232static int fdstate(struct fdc_data *);
233static int retrier(struct fdc_data *);
b13267a5 234static int fdformat(cdev_t, struct fd_formb *, struct ucred *);
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235
236static int enable_fifo(fdc_p fdc);
237
238static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
239
240
241#define DEVIDLE 0
242#define FINDWORK 1
243#define DOSEEK 2
244#define SEEKCOMPLETE 3
245#define IOCOMPLETE 4
246#define RECALCOMPLETE 5
247#define STARTRECAL 6
248#define RESETCTLR 7
249#define SEEKWAIT 8
250#define RECALWAIT 9
251#define MOTORWAIT 10
252#define IOTIMEDOUT 11
253#define RESETCOMPLETE 12
254#define PIOREAD 13
255
256#ifdef FDC_DEBUG
257static char const * const fdstates[] =
258{
259"DEVIDLE",
260"FINDWORK",
261"DOSEEK",
262"SEEKCOMPLETE",
263"IOCOMPLETE",
264"RECALCOMPLETE",
265"STARTRECAL",
266"RESETCTLR",
267"SEEKWAIT",
268"RECALWAIT",
269"MOTORWAIT",
270"IOTIMEDOUT",
271"RESETCOMPLETE",
272"PIOREAD",
273};
274
275/* CAUTION: fd_debug causes huge amounts of logging output */
276static int volatile fd_debug = 0;
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277#define TRACE0(arg) if(fd_debug) kprintf(arg)
278#define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2)
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279#else /* FDC_DEBUG */
280#define TRACE0(arg)
281#define TRACE1(arg1, arg2)
282#endif /* FDC_DEBUG */
283
8c5c0470 284void
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285fdout_wr(fdc_p fdc, u_int8_t v)
286{
287 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
288}
289
290static u_int8_t
291fdsts_rd(fdc_p fdc)
292{
293 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
294}
295
296static void
297fddata_wr(fdc_p fdc, u_int8_t v)
298{
299 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
300}
301
302static u_int8_t
303fddata_rd(fdc_p fdc)
304{
305 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
306}
307
308static void
309fdctl_wr_isa(fdc_p fdc, u_int8_t v)
310{
311 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
312}
313
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314#if 0
315
316static u_int8_t
317fdin_rd(fdc_p fdc)
318{
319 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
320}
321
322#endif
323
324static d_open_t Fdopen; /* NOTE, not fdopen */
325static d_close_t fdclose;
326static d_ioctl_t fdioctl;
327static d_strategy_t fdstrategy;
328
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329static struct dev_ops fd_ops = {
330 { "fd", FD_CDEV_MAJOR, D_DISK },
331 .d_open = Fdopen,
332 .d_close = fdclose,
333 .d_read = physread,
334 .d_write = physwrite,
335 .d_ioctl = fdioctl,
336 .d_strategy = fdstrategy,
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337};
338
339static int
340fdc_err(struct fdc_data *fdc, const char *s)
341{
342 fdc->fdc_errs++;
343 if (s) {
344 if (fdc->fdc_errs < FDC_ERRMAX)
345 device_printf(fdc->fdc_dev, "%s", s);
346 else if (fdc->fdc_errs == FDC_ERRMAX)
347 device_printf(fdc->fdc_dev, "too many errors, not "
348 "logging any more\n");
349 }
350
351 return FD_FAILED;
352}
353
354/*
355 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
356 * Unit number,
357 * # of output bytes, output bytes as ints ...,
358 * # of input bytes, input bytes as ints ...
359 */
8c5c0470 360int
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361fd_cmd(struct fdc_data *fdc, int n_out, ...)
362{
363 u_char cmd;
364 int n_in;
365 int n;
e2565a42 366 __va_list ap;
984263bc 367
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368 __va_start(ap, n_out);
369 cmd = (u_char)(__va_arg(ap, int));
370 __va_end(ap);
371 __va_start(ap, n_out);
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372 for (n = 0; n < n_out; n++)
373 {
e2565a42 374 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
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375 {
376 char msg[50];
f8c7a42d 377 ksnprintf(msg, sizeof(msg),
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378 "cmd %x failed at out byte %d of %d\n",
379 cmd, n + 1, n_out);
380 return fdc_err(fdc, msg);
381 }
382 }
e2565a42 383 n_in = __va_arg(ap, int);
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384 for (n = 0; n < n_in; n++)
385 {
e2565a42 386 int *ptr = __va_arg(ap, int *);
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387 if (fd_in(fdc, ptr) < 0)
388 {
389 char msg[50];
f8c7a42d 390 ksnprintf(msg, sizeof(msg),
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391 "cmd %02x failed at in byte %d of %d\n",
392 cmd, n + 1, n_in);
393 return fdc_err(fdc, msg);
394 }
395 }
396
397 return 0;
398}
399
400static int
401enable_fifo(fdc_p fdc)
402{
403 int i, j;
404
405 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
406
407 /*
408 * XXX:
409 * Cannot use fd_cmd the normal way here, since
410 * this might be an invalid command. Thus we send the
411 * first byte, and check for an early turn of data directon.
412 */
413
414 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
415 return fdc_err(fdc, "Enable FIFO failed\n");
416
417 /* If command is invalid, return */
418 j = FDSTS_TIMEOUT;
419 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
420 != NE7_RQM && j-- > 0) {
421 if (i == (NE7_DIO | NE7_RQM)) {
422 fdc_reset(fdc);
423 return FD_FAILED;
424 }
425 DELAY(1);
426 }
427 if (j<0 ||
428 fd_cmd(fdc, 3,
429 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
430 fdc_reset(fdc);
431 return fdc_err(fdc, "Enable FIFO failed\n");
432 }
433 fdc->flags |= FDC_HAS_FIFO;
434 return 0;
435 }
436 if (fd_cmd(fdc, 4,
437 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
438 return fdc_err(fdc, "Re-enable FIFO failed\n");
439 return 0;
440}
441
442static int
443fd_sense_drive_status(fdc_p fdc, int *st3p)
444{
445 int st3;
446
447 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
448 {
449 return fdc_err(fdc, "Sense Drive Status failed\n");
450 }
451 if (st3p)
452 *st3p = st3;
453
454 return 0;
455}
456
457static int
458fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
459{
460 int cyl, st0, ret;
461
462 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
463 if (ret) {
464 (void)fdc_err(fdc,
465 "sense intr err reading stat reg 0\n");
466 return ret;
467 }
468
469 if (st0p)
470 *st0p = st0;
471
472 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
473 /*
474 * There doesn't seem to have been an interrupt.
475 */
476 return FD_NOT_VALID;
477 }
478
479 if (fd_in(fdc, &cyl) < 0) {
480 return fdc_err(fdc, "can't get cyl num\n");
481 }
482
483 if (cylp)
484 *cylp = cyl;
485
486 return 0;
487}
488
489
490static int
491fd_read_status(fdc_p fdc, int fdsu)
492{
493 int i, ret;
494
495 for (i = 0; i < 7; i++) {
496 /*
497 * XXX types are poorly chosen. Only bytes can by read
498 * from the hardware, but fdc->status[] wants u_ints and
499 * fd_in() gives ints.
500 */
501 int status;
502
503 ret = fd_in(fdc, &status);
504 fdc->status[i] = status;
505 if (ret != 0)
506 break;
507 }
508
509 if (ret == 0)
510 fdc->flags |= FDC_STAT_VALID;
511 else
512 fdc->flags &= ~FDC_STAT_VALID;
513
514 return ret;
515}
516
517/****************************************************************************/
518/* autoconfiguration stuff */
519/****************************************************************************/
520
8c5c0470 521int
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522fdc_alloc_resources(struct fdc_data *fdc)
523{
524 device_t dev;
525 int ispnp, ispcmcia;
526
527 dev = fdc->fdc_dev;
528 ispnp = (fdc->flags & FDC_ISPNP) != 0;
529 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
530 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
531 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
532
533 /*
534 * On standard ISA, we don't just use an 8 port range
535 * (e.g. 0x3f0-0x3f7) since that covers an IDE control
536 * register at 0x3f6.
537 *
538 * Isn't PC hardware wonderful.
539 *
540 * The Y-E Data PCMCIA FDC doesn't have this problem, it
541 * uses the register with offset 6 for pseudo-DMA, and the
542 * one with offset 7 as control register.
543 */
544 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
545 &fdc->rid_ioport, 0ul, ~0ul,
546 ispcmcia ? 8 : (ispnp ? 1 : 6),
547 RF_ACTIVE);
548 if (fdc->res_ioport == 0) {
549 device_printf(dev, "cannot reserve I/O port range\n");
550 return ENXIO;
551 }
552 fdc->portt = rman_get_bustag(fdc->res_ioport);
553 fdc->porth = rman_get_bushandle(fdc->res_ioport);
554
555 if (!ispcmcia) {
556 /*
557 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
558 * and some at 0x3f0-0x3f5,0x3f7. We detect the former
559 * by checking the size and adjust the port address
560 * accordingly.
561 */
562 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
563 fdc->port_off = -2;
564
565 /*
566 * Register the control port range as rid 1 if it
567 * isn't there already. Most PnP BIOSen will have
568 * already done this but non-PnP configurations don't.
569 *
570 * And some (!!) report 0x3f2-0x3f5 and completely
571 * leave out the control register! It seems that some
572 * non-antique controller chips have a different
573 * method of programming the transfer speed which
574 * doesn't require the control register, but it's
575 * mighty bogus as the chip still responds to the
576 * address for the control register.
577 */
578 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
579 u_long ctlstart;
580
581 /* Find the control port, usually 0x3f7 */
582 ctlstart = rman_get_start(fdc->res_ioport) +
583 fdc->port_off + 7;
584
585 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
586 }
587
588 /*
589 * Now (finally!) allocate the control port.
590 */
591 fdc->rid_ctl = 1;
592 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
593 &fdc->rid_ctl,
594 0ul, ~0ul, 1, RF_ACTIVE);
595 if (fdc->res_ctl == 0) {
596 device_printf(dev,
597 "cannot reserve control I/O port range\n");
598 return ENXIO;
599 }
600 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
601 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
602 }
603
604 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
605 &fdc->rid_irq, 0ul, ~0ul, 1,
606 RF_ACTIVE);
607 if (fdc->res_irq == 0) {
608 device_printf(dev, "cannot reserve interrupt line\n");
609 return ENXIO;
610 }
611
612 if ((fdc->flags & FDC_NODMA) == 0) {
613 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
614 &fdc->rid_drq, 0ul, ~0ul, 1,
615 RF_ACTIVE);
616 if (fdc->res_drq == 0) {
617 device_printf(dev, "cannot reserve DMA request line\n");
618 return ENXIO;
619 }
620 fdc->dmachan = fdc->res_drq->r_start;
621 }
622
623 return 0;
624}
625
8c5c0470 626void
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627fdc_release_resources(struct fdc_data *fdc)
628{
629 device_t dev;
630
631 dev = fdc->fdc_dev;
632 if (fdc->res_irq != 0) {
633 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
634 fdc->res_irq);
635 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
636 fdc->res_irq);
637 }
638 if (fdc->res_ctl != 0) {
639 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
640 fdc->res_ctl);
641 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
642 fdc->res_ctl);
643 }
644 if (fdc->res_ioport != 0) {
645 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
646 fdc->res_ioport);
647 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
648 fdc->res_ioport);
649 }
650 if (fdc->res_drq != 0) {
651 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
652 fdc->res_drq);
653 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
654 fdc->res_drq);
655 }
656}
657
658/****************************************************************************/
659/* autoconfiguration stuff */
660/****************************************************************************/
661
662static struct isa_pnp_id fdc_ids[] = {
663 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
664 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
665 {0}
666};
667
8c5c0470 668int
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669fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
670{
671 struct fdc_ivars *ivars = device_get_ivars(child);
672
673 switch (which) {
674 case FDC_IVAR_FDUNIT:
675 *result = ivars->fdunit;
676 break;
677 default:
678 return ENOENT;
679 }
680 return 0;
681}
682
683/*
684 * fdc controller section.
685 */
686static int
687fdc_probe(device_t dev)
688{
689 int error, ic_type;
690 struct fdc_data *fdc;
691
692 fdc = device_get_softc(dev);
693 bzero(fdc, sizeof *fdc);
694 fdc->fdc_dev = dev;
695 fdc->fdctl_wr = fdctl_wr_isa;
696
697 /* Check pnp ids */
698 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
699 if (error == ENXIO)
700 return ENXIO;
701 if (error == 0)
702 fdc->flags |= FDC_ISPNP;
703
704 /* Attempt to allocate our resources for the duration of the probe */
705 error = fdc_alloc_resources(fdc);
706 if (error)
707 goto out;
708
709 /* First - lets reset the floppy controller */
710 fdout_wr(fdc, 0);
711 DELAY(100);
712 fdout_wr(fdc, FDO_FRST);
713
714 /* see if it can handle a command */
715 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
716 NE7_SPEC_2(2, 0), 0)) {
717 error = ENXIO;
718 goto out;
719 }
720
721 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
722 ic_type = (u_char)ic_type;
723 switch (ic_type) {
724 case 0x80:
725 device_set_desc(dev, "NEC 765 or clone");
726 fdc->fdct = FDC_NE765;
727 break;
728 case 0x81:
729 device_set_desc(dev, "Intel 82077 or clone");
730 fdc->fdct = FDC_I82077;
731 break;
732 case 0x90:
733 device_set_desc(dev, "NEC 72065B or clone");
734 fdc->fdct = FDC_NE72065;
735 break;
736 default:
737 device_set_desc(dev, "generic floppy controller");
738 fdc->fdct = FDC_UNKNOWN;
739 break;
740 }
741 }
742
743out:
744 fdc_release_resources(fdc);
745 return (error);
746}
747
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748/*
749 * Add a child device to the fdc controller. It will then be probed etc.
750 */
751static void
752fdc_add_child(device_t dev, const char *name, int unit)
753{
754 int disabled;
755 struct fdc_ivars *ivar;
756 device_t child;
757
efda3bd0 758 ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
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759 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
760 ivar->fdunit = 0;
761 child = device_add_child(dev, name, unit);
762 if (child == NULL)
763 return;
764 device_set_ivars(child, ivar);
765 if (resource_int_value(name, unit, "disabled", &disabled) == 0
766 && disabled != 0)
767 device_disable(child);
768}
769
8c5c0470 770int
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771fdc_attach(device_t dev)
772{
773 struct fdc_data *fdc;
774 int i, error;
775
776 fdc = device_get_softc(dev);
8b97cf2a
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777
778 callout_init(&fdc->pseudointr_ch);
779
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780 error = fdc_alloc_resources(fdc);
781 if (error) {
782 device_printf(dev, "cannot re-aquire resources\n");
783 return error;
784 }
785 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
ee61f228 786 0, fdc_intr, fdc,
e9cb6d99 787 &fdc->fdc_intr, NULL);
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788 if (error) {
789 device_printf(dev, "cannot setup interrupt\n");
790 return error;
791 }
792 fdc->fdcu = device_get_unit(dev);
793 fdc->flags |= FDC_ATTACHED;
794
795 if ((fdc->flags & FDC_NODMA) == 0) {
796 /* Acquire the DMA channel forever, The driver will do the rest */
797 /* XXX should integrate with rman */
798 isa_dma_acquire(fdc->dmachan);
799 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
800 }
801 fdc->state = DEVIDLE;
802
803 /* reset controller, turn motor off, clear fdout mirror reg */
804 fdout_wr(fdc, ((fdc->fdout = 0)));
81b5c339 805 bioq_init(&fdc->bio_queue);
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806
807 /*
808 * Probe and attach any children. We should probably detect
809 * devices from the BIOS unless overridden.
810 */
811 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
812 i != -1;
813 i = resource_query_string(i, "at", device_get_nameunit(dev)))
814 fdc_add_child(dev, resource_query_name(i),
815 resource_query_unit(i));
816
817 return (bus_generic_attach(dev));
818}
819
8c5c0470 820int
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821fdc_print_child(device_t me, device_t child)
822{
823 int retval = 0;
824
825 retval += bus_print_child_header(me, child);
e3869ec7 826 retval += kprintf(" on %s drive %d\n", device_get_nameunit(me),
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827 fdc_get_fdunit(child));
828
829 return (retval);
830}
831
832static device_method_t fdc_methods[] = {
833 /* Device interface */
834 DEVMETHOD(device_probe, fdc_probe),
835 DEVMETHOD(device_attach, fdc_attach),
836 DEVMETHOD(device_detach, bus_generic_detach),
837 DEVMETHOD(device_shutdown, bus_generic_shutdown),
838 DEVMETHOD(device_suspend, bus_generic_suspend),
839 DEVMETHOD(device_resume, bus_generic_resume),
840
841 /* Bus interface */
842 DEVMETHOD(bus_print_child, fdc_print_child),
843 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
844 /* Our children never use any other bus interface methods. */
845
846 { 0, 0 }
847};
848
849static driver_t fdc_driver = {
850 "fdc",
851 fdc_methods,
852 sizeof(struct fdc_data)
853};
854
855DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
856
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857/******************************************************************/
858/*
859 * devices attached to the controller section.
860 */
861static int
862fd_probe(device_t dev)
863{
864 int i;
865 u_int fdt, st0, st3;
866 struct fd_data *fd;
867 struct fdc_data *fdc;
868 fdsu_t fdsu;
869 static int fd_fifo = 0;
870
871 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
872 fd = device_get_softc(dev);
873 fdc = device_get_softc(device_get_parent(dev));
874
875 bzero(fd, sizeof *fd);
876 fd->dev = dev;
877 fd->fdc = fdc;
878 fd->fdsu = fdsu;
879 fd->fdu = device_get_unit(dev);
880
881#ifdef __i386__
882 /* look up what bios thinks we have */
883 switch (fd->fdu) {
884 case 0:
885 if ((fdc->flags & FDC_ISPCMCIA))
886 fdt = RTCFDT_144M;
887 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
888 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
889 else
890 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
891 break;
892 case 1:
893 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
894 break;
895 default:
896 fdt = RTCFDT_NONE;
897 break;
898 }
899#else
900 fdt = RTCFDT_144M; /* XXX probably */
901#endif
902
903 /* is there a unit? */
904 if (fdt == RTCFDT_NONE)
905 return (ENXIO);
906
907 /* select it */
908 set_motor(fdc, fdsu, TURNON);
909 DELAY(1000000); /* 1 sec */
910
911 /* XXX This doesn't work before the first set_motor() */
912 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
913 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
914 && enable_fifo(fdc) == 0) {
915 device_printf(device_get_parent(dev),
916 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
917 }
918 fd_fifo = 1;
919
920 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
921 && (st3 & NE7_ST3_T0)) {
922 /* if at track 0, first seek inwards */
923 /* seek some steps: */
924 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
925 DELAY(300000); /* ...wait a moment... */
926 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
927 }
928
929 /* If we're at track 0 first seek inwards. */
930 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
931 /* Seek some steps... */
932 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
933 /* ...wait a moment... */
934 DELAY(300000);
935 /* make ctrlr happy: */
936 fd_sense_int(fdc, 0, 0);
937 }
938 }
939
940 for (i = 0; i < 2; i++) {
941 /*
942 * we must recalibrate twice, just in case the
943 * heads have been beyond cylinder 76, since most
944 * FDCs still barf when attempting to recalibrate
945 * more than 77 steps
946 */
947 /* go back to 0: */
948 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
949 /* a second being enough for full stroke seek*/
950 DELAY(i == 0 ? 1000000 : 300000);
951
952 /* anything responding? */
953 if (fd_sense_int(fdc, &st0, 0) == 0 &&
954 (st0 & NE7_ST0_EC) == 0)
955 break; /* already probed succesfully */
956 }
957 }
958
959 set_motor(fdc, fdsu, TURNOFF);
960
961 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
962 return (ENXIO);
963
964 fd->track = FD_NO_TRACK;
965 fd->fdc = fdc;
966 fd->fdsu = fdsu;
967 fd->options = 0;
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968 callout_init(&fd->toffhandle);
969 callout_init(&fd->tohandle);
4fc46503 970 callout_init(&fd->motor);
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971
972 switch (fdt) {
973 case RTCFDT_12M:
974 device_set_desc(dev, "1200-KB 5.25\" drive");
975 fd->type = FD_1200;
976 break;
977 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
978 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
979 fdt = RTCFDT_144M;
980 fd->type = FD_1440;
981 case RTCFDT_144M:
982 device_set_desc(dev, "1440-KB 3.5\" drive");
983 fd->type = FD_1440;
984 break;
985 case RTCFDT_288M:
986 case RTCFDT_288M_1:
987 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
988 fd->type = FD_1440;
989 break;
990 case RTCFDT_360K:
991 device_set_desc(dev, "360-KB 5.25\" drive");
992 fd->type = FD_360;
993 break;
994 case RTCFDT_720K:
e3869ec7 995 kprintf("720-KB 3.5\" drive");
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996 fd->type = FD_720;
997 break;
998 default:
999 return (ENXIO);
1000 }
1001 return (0);
1002}
1003
1004static int
1005fd_attach(device_t dev)
1006{
1007 struct fd_data *fd;
1008#if 0
1009 int i;
1010 int mynor;
1011 int typemynor;
1012 int typesize;
1013#endif
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1014
1015 fd = device_get_softc(dev);
1016
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MD
1017 dev_ops_add(&fd_ops, -1 << 6, fd->fdu << 6);
1018 make_dev(&fd_ops, (fd->fdu << 6),
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MD
1019 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu);
1020
1021#if 0
1022 /* Other make_dev() go here. */
1023#endif
1024
1025 /*
1026 * Export the drive to the devstat interface.
1027 */
1028 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1029 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1030 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1031 DEVSTAT_PRIORITY_FD);
1032 return (0);
1033}
1034
1035static int
1036fd_detach(device_t dev)
1037{
1038 struct fd_data *fd;
1039
1040 fd = device_get_softc(dev);
e8b273ff 1041 callout_stop(&fd->toffhandle);
4fc46503 1042 callout_stop(&fd->motor);
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1043
1044 return (0);
1045}
1046
1047static device_method_t fd_methods[] = {
1048 /* Device interface */
1049 DEVMETHOD(device_probe, fd_probe),
1050 DEVMETHOD(device_attach, fd_attach),
1051 DEVMETHOD(device_detach, fd_detach),
1052 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1053 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1054 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1055
1056 { 0, 0 }
1057};
1058
1059static driver_t fd_driver = {
1060 "fd",
1061 fd_methods,
1062 sizeof(struct fd_data)
1063};
1064
1065DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1066
1067/****************************************************************************/
1068/* motor control stuff */
1069/* remember to not deselect the drive we're working on */
1070/****************************************************************************/
1071static void
1072set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1073{
1074 int fdout = fdc->fdout;
1075 int needspecify = 0;
1076
1077 if(turnon) {
1078 fdout &= ~FDO_FDSEL;
1079 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1080 } else
1081 fdout &= ~(FDO_MOEN0 << fdsu);
1082
1083 if(!turnon
1084 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1085 /* gonna turn off the last drive, put FDC to bed */
1086 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1087 else {
1088 /* make sure controller is selected and specified */
1089 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1090 needspecify = 1;
1091 fdout |= (FDO_FRST|FDO_FDMAEN);
1092 }
1093
1094 fdout_wr(fdc, fdout);
1095 fdc->fdout = fdout;
1096 TRACE1("[0x%x->FDOUT]", fdout);
1097
1098 if (needspecify) {
1099 /*
1100 * XXX
1101 * special case: since we have just woken up the FDC
1102 * from its sleep, we silently assume the command will
1103 * be accepted, and do not test for a timeout
1104 */
1105 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1106 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1107 0);
1108 if (fdc->flags & FDC_HAS_FIFO)
1109 (void) enable_fifo(fdc);
1110 }
1111}
1112
1113static void
1114fd_turnoff(void *xfd)
1115{
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1116 fd_p fd = xfd;
1117
1118 TRACE1("[fd%d: turnoff]", fd->fdu);
1119
fbe276c7 1120 crit_enter();
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MD
1121 /*
1122 * Don't turn off the motor yet if the drive is active.
1123 *
1124 * If we got here, this could only mean we missed an interrupt.
1125 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1126 * after a controller reset. Just schedule a pseudo-interrupt
1127 * so the state machine gets re-entered.
1128 */
1129 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1130 fdc_intr(fd->fdc);
fbe276c7 1131 crit_exit();
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1132 return;
1133 }
1134
1135 fd->flags &= ~FD_MOTOR;
1136 set_motor(fd->fdc, fd->fdsu, TURNOFF);
fbe276c7 1137 crit_exit();
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1138}
1139
1140static void
1141fd_motor_on(void *xfd)
1142{
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1143 fd_p fd = xfd;
1144
fbe276c7 1145 crit_enter();
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1146 fd->flags &= ~FD_MOTOR_WAIT;
1147 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1148 {
1149 fdc_intr(fd->fdc);
1150 }
fbe276c7 1151 crit_exit();
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1152}
1153
1154static void
1155fd_turnon(fd_p fd)
1156{
1157 if(!(fd->flags & FD_MOTOR))
1158 {
1159 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1160 set_motor(fd->fdc, fd->fdsu, TURNON);
4fc46503 1161 callout_reset(&fd->motor, hz, fd_motor_on, fd);
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1162 }
1163}
1164
1165static void
1166fdc_reset(fdc_p fdc)
1167{
1168 /* Try a reset, keep motor on */
1169 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1170 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1171 DELAY(100);
1172 /* enable FDC, but defer interrupts a moment */
1173 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1174 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1175 DELAY(100);
1176 fdout_wr(fdc, fdc->fdout);
1177 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1178
1179 /* XXX after a reset, silently believe the FDC will accept commands */
1180 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1181 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1182 0);
1183 if (fdc->flags & FDC_HAS_FIFO)
1184 (void) enable_fifo(fdc);
1185}
1186
1187/****************************************************************************/
1188/* fdc in/out */
1189/****************************************************************************/
1190/*
1191 * FDC IO functions, take care of the main status register, timeout
1192 * in case the desired status bits are never set.
1193 *
1194 * These PIO loops initially start out with short delays between
1195 * each iteration in the expectation that the required condition
1196 * is usually met quickly, so it can be handled immediately. After
1197 * about 1 ms, stepping is increased to achieve a better timing
1198 * accuracy in the calls to DELAY().
1199 */
1200static int
1201fd_in(struct fdc_data *fdc, int *ptr)
1202{
1203 int i, j, step;
1204
1205 for (j = 0, step = 1;
1206 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1207 j < FDSTS_TIMEOUT;
1208 j += step) {
1209 if (i == NE7_RQM)
1210 return (fdc_err(fdc, "ready for output in input\n"));
1211 if (j == 1000)
1212 step = 1000;
1213 DELAY(step);
1214 }
1215 if (j >= FDSTS_TIMEOUT)
1216 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1217#ifdef FDC_DEBUG
1218 i = fddata_rd(fdc);
1219 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1220 *ptr = i;
1221 return (0);
1222#else /* !FDC_DEBUG */
1223 i = fddata_rd(fdc);
1224 if (ptr)
1225 *ptr = i;
1226 return (0);
1227#endif /* FDC_DEBUG */
1228}
1229
1230static int
1231out_fdc(struct fdc_data *fdc, int x)
1232{
1233 int i, j, step;
1234
1235 for (j = 0, step = 1;
1236 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1237 j < FDSTS_TIMEOUT;
1238 j += step) {
1239 if (i == (NE7_DIO|NE7_RQM))
1240 return (fdc_err(fdc, "ready for input in output\n"));
1241 if (j == 1000)
1242 step = 1000;
1243 DELAY(step);
1244 }
1245 if (j >= FDSTS_TIMEOUT)
1246 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1247
1248 /* Send the command and return */
1249 fddata_wr(fdc, x);
1250 TRACE1("[0x%x->FDDATA]", x);
1251 return (0);
1252}
1253
1254/****************************************************************************/
1255/* fdopen/fdclose */
1256/****************************************************************************/
1257int
fef8985e 1258Fdopen(struct dev_open_args *ap)
984263bc 1259{
b13267a5 1260 cdev_t dev = ap->a_head.a_dev;
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1261 fdu_t fdu = FDUNIT(minor(dev));
1262 int type = FDTYPE(minor(dev));
1263 fd_p fd;
1264 fdc_p fdc;
1265
1266 /* check bounds */
1267 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1268 return (ENXIO);
1269 fdc = fd->fdc;
1270 if ((fdc == NULL) || (fd->type == NO_TYPE))
1271 return (ENXIO);
1272 if (type > NUMDENS)
1273 return (ENXIO);
1274 if (type == 0)
1275 type = fd->type;
1276 else {
1277 /*
1278 * For each type of basic drive, make sure we are trying
1279 * to open a type it can do,
1280 */
1281 if (type != fd->type) {
1282 switch (fd->type) {
1283 case FD_360:
1284 return (ENXIO);
1285 case FD_720:
1286 if ( type != FD_820
1287 && type != FD_800
1288 && type != FD_640
1289 )
1290 return (ENXIO);
1291 break;
1292 case FD_1200:
1293 switch (type) {
1294 case FD_1480:
1295 type = FD_1480in5_25;
1296 break;
1297 case FD_1440:
1298 type = FD_1440in5_25;
1299 break;
1300 case FD_1232:
1301 break;
1302 case FD_820:
1303 type = FD_820in5_25;
1304 break;
1305 case FD_800:
1306 type = FD_800in5_25;
1307 break;
1308 case FD_720:
1309 type = FD_720in5_25;
1310 break;
1311 case FD_640:
1312 type = FD_640in5_25;
1313 break;
1314 case FD_360:
1315 type = FD_360in5_25;
1316 break;
1317 default:
1318 return(ENXIO);
1319 }
1320 break;
1321 case FD_1440:
1322 if ( type != FD_1720
1323 && type != FD_1480
1324 && type != FD_1200
1325 && type != FD_820
1326 && type != FD_800
1327 && type != FD_720
1328 && type != FD_640
1329 )
1330 return(ENXIO);
1331 break;
1332 }
1333 }
1334 }
1335 fd->ft = fd_types + type - 1;
1336 fd->flags |= FD_OPEN;
1337 /*
1338 * Clearing the DMA overrun counter at open time is a bit messy.
1339 * Since we're only managing one counter per controller, opening
1340 * the second drive could mess it up. Anyway, if the DMA overrun
1341 * condition is really persistent, it will eventually time out
1342 * still. OTOH, clearing it here will ensure we'll at least start
1343 * trying again after a previous (maybe even long ago) failure.
1344 * Also, this is merely a stop-gap measure only that should not
1345 * happen during normal operation, so we can tolerate it to be a
1346 * bit sloppy about this.
1347 */
1348 fdc->dma_overruns = 0;
1349
1350 return 0;
1351}
1352
1353int
fef8985e 1354fdclose(struct dev_close_args *ap)
984263bc 1355{
b13267a5 1356 cdev_t dev = ap->a_head.a_dev;
984263bc
MD
1357 fdu_t fdu = FDUNIT(minor(dev));
1358 struct fd_data *fd;
1359
1360 fd = devclass_get_softc(fd_devclass, fdu);
1361 fd->flags &= ~FD_OPEN;
1362 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1363
1364 return (0);
1365}
1366
1367/****************************************************************************/
1368/* fdstrategy */
1369/****************************************************************************/
fef8985e
MD
1370int
1371fdstrategy(struct dev_strategy_args *ap)
984263bc 1372{
b13267a5 1373 cdev_t dev = ap->a_head.a_dev;
fef8985e 1374 struct bio *bio = ap->a_bio;
81b5c339 1375 struct buf *bp = bio->bio_buf;
984263bc 1376 unsigned nblocks, blknum, cando;
984263bc
MD
1377 fdu_t fdu;
1378 fdc_p fdc;
1379 fd_p fd;
1380 size_t fdblk;
1381
81b5c339 1382 fdu = FDUNIT(minor(dev));
984263bc
MD
1383 fd = devclass_get_softc(fd_devclass, fdu);
1384 if (fd == 0)
1385 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
81b5c339 1386 (u_long)major(dev), (u_long)minor(dev));
984263bc
MD
1387 fdc = fd->fdc;
1388 if (fd->type == NO_TYPE) {
1389 bp->b_error = ENXIO;
1390 bp->b_flags |= B_ERROR;
1391 goto bad;
1392 };
1393
1394 fdblk = 128 << (fd->ft->secsize);
10f3fee5 1395 if (bp->b_cmd != BUF_CMD_FORMAT) {
54078292 1396 if (bio->bio_offset < 0) {
e3869ec7 1397 kprintf(
54078292
MD
1398 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n",
1399 fdu, bio->bio_offset, bp->b_bcount);
984263bc
MD
1400 bp->b_error = EINVAL;
1401 bp->b_flags |= B_ERROR;
1402 goto bad;
1403 }
1404 if ((bp->b_bcount % fdblk) != 0) {
1405 bp->b_error = EINVAL;
1406 bp->b_flags |= B_ERROR;
1407 goto bad;
1408 }
1409 }
1410
1411 /*
1412 * Set up block calculations.
1413 */
54078292 1414 if (bio->bio_offset > 20000000LL * fdblk) {
984263bc
MD
1415 /*
1416 * Reject unreasonably high block number, prevent the
1417 * multiplication below from overflowing.
1418 */
1419 bp->b_error = EINVAL;
1420 bp->b_flags |= B_ERROR;
1421 goto bad;
1422 }
54078292 1423 blknum = (unsigned)(bio->bio_offset / fdblk);
984263bc
MD
1424 nblocks = fd->ft->size;
1425 bp->b_resid = 0;
1426 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1427 if (blknum <= nblocks) {
1428 cando = (nblocks - blknum) * fdblk;
1429 bp->b_resid = bp->b_bcount - cando;
1430 if (cando == 0)
1431 goto bad; /* not actually bad but EOF */
1432 } else {
1433 bp->b_error = EINVAL;
1434 bp->b_flags |= B_ERROR;
1435 goto bad;
1436 }
1437 }
fbe276c7 1438 crit_enter();
81b5c339
MD
1439 bio->bio_driver_info = dev;
1440 bioqdisksort(&fdc->bio_queue, bio);
e8b273ff 1441 callout_stop(&fd->toffhandle);
984263bc
MD
1442
1443 /* Tell devstat we are starting on the transaction */
1444 devstat_start_transaction(&fd->device_stats);
1445 device_busy(fd->dev);
1446
1447 fdstart(fdc);
fbe276c7 1448 crit_exit();
fef8985e 1449 return(0);
984263bc
MD
1450
1451bad:
81b5c339 1452 biodone(bio);
fef8985e 1453 return(0);
984263bc
MD
1454}
1455
1456/***************************************************************\
1457* fdstart *
1458* We have just queued something.. if the controller is not busy *
1459* then simulate the case where it has just finished a command *
1460* So that it (the interrupt routine) looks on the queue for more*
1461* work to do and picks up what we just added. *
1462* If the controller is already busy, we need do nothing, as it *
1463* will pick up our work when the present work completes *
1464\***************************************************************/
1465static void
1466fdstart(struct fdc_data *fdc)
1467{
fbe276c7 1468 crit_enter();
984263bc
MD
1469 if(fdc->state == DEVIDLE)
1470 {
1471 fdc_intr(fdc);
1472 }
fbe276c7 1473 crit_exit();
984263bc
MD
1474}
1475
1476static void
1477fd_iotimeout(void *xfdc)
1478{
1479 fdc_p fdc;
984263bc
MD
1480
1481 fdc = xfdc;
1482 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1483
1484 /*
1485 * Due to IBM's brain-dead design, the FDC has a faked ready
1486 * signal, hardwired to ready == true. Thus, any command
1487 * issued if there's no diskette in the drive will _never_
1488 * complete, and must be aborted by resetting the FDC.
1489 * Many thanks, Big Blue!
1490 * The FDC must not be reset directly, since that would
1491 * interfere with the state machine. Instead, pretend that
1492 * the command completed but was invalid. The state machine
1493 * will reset the FDC and retry once.
1494 */
fbe276c7 1495 crit_enter();
984263bc
MD
1496 fdc->status[0] = NE7_ST0_IC_IV;
1497 fdc->flags &= ~FDC_STAT_VALID;
1498 fdc->state = IOTIMEDOUT;
1499 fdc_intr(fdc);
fbe276c7 1500 crit_exit();
984263bc
MD
1501}
1502
fbe276c7 1503/* just ensure it is running in a critical section */
984263bc
MD
1504static void
1505fd_pseudointr(void *xfdc)
1506{
fbe276c7 1507 crit_enter();
984263bc 1508 fdc_intr(xfdc);
fbe276c7 1509 crit_exit();
984263bc
MD
1510}
1511
1512/***********************************************************************\
1513* fdintr *
1514* keep calling the state machine until it returns a 0 *
1515* ALWAYS called at SPLBIO *
1516\***********************************************************************/
1517static void
1518fdc_intr(void *xfdc)
1519{
1520 fdc_p fdc = xfdc;
1521 while(fdstate(fdc))
1522 ;
1523}
1524
1525/*
1526 * magic pseudo-DMA initialization for YE FDC. Sets count and
1527 * direction
1528 */
1529#define SET_BCDR(fdc,wr,cnt,port) \
1530 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1531 ((cnt)-1) & 0xff); \
1532 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1533 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1534
1535/*
1536 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1537 */
10f3fee5 1538static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
984263bc
MD
1539{
1540 u_char *cptr = (u_char *)addr;
1541
10f3fee5 1542 if (cmd == BUF_CMD_READ) {
984263bc
MD
1543 if (fdc->state != PIOREAD) {
1544 fdc->state = PIOREAD;
1545 return(0);
1546 };
1547 SET_BCDR(fdc, 0, count, 0);
1548 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1549 FDC_YE_DATAPORT, cptr, count);
1550 } else {
1551 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1552 FDC_YE_DATAPORT, cptr, count);
1553 SET_BCDR(fdc, 0, count, 0);
1554 };
1555 return(1);
1556}
1557
1558/***********************************************************************\
1559* The controller state machine. *
1560* if it returns a non zero value, it should be called again immediatly *
1561\***********************************************************************/
1562static int
1563fdstate(fdc_p fdc)
1564{
1565 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1566 unsigned blknum = 0, b_cylinder = 0;
1567 fdu_t fdu = fdc->fdu;
1568 fd_p fd;
81b5c339 1569 struct bio *bio;
3a1b0fdc 1570 struct buf *bp;
984263bc
MD
1571 struct fd_formb *finfo = NULL;
1572 size_t fdblk;
b13267a5 1573 cdev_t dev;
81b5c339
MD
1574
1575 bio = fdc->bio;
1576 if (bio == NULL) {
1577 bio = bioq_first(&fdc->bio_queue);
1578 if (bio != NULL) {
1579 bioq_remove(&fdc->bio_queue, bio);
1580 fdc->bio = bio;
984263bc
MD
1581 }
1582 }
81b5c339 1583 if (bio == NULL) {
984263bc
MD
1584 /***********************************************\
1585 * nothing left for this controller to do *
1586 * Force into the IDLE state, *
1587 \***********************************************/
1588 fdc->state = DEVIDLE;
1589 if (fdc->fd) {
1590 device_printf(fdc->fdc_dev,
1591 "unexpected valid fd pointer\n");
1592 fdc->fd = (fd_p) 0;
1593 fdc->fdu = -1;
1594 }
1595 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1596 return (0);
1597 }
81b5c339
MD
1598 bp = bio->bio_buf;
1599 dev = bio->bio_driver_info;
1600
1601 fdu = FDUNIT(minor(dev));
984263bc
MD
1602 fd = devclass_get_softc(fd_devclass, fdu);
1603 fdblk = 128 << fd->ft->secsize;
1604 if (fdc->fd && (fd != fdc->fd))
1605 device_printf(fd->dev, "confused fd pointers\n");
10f3fee5
MD
1606 read = (bp->b_cmd == BUF_CMD_READ);
1607 format = (bp->b_cmd == BUF_CMD_FORMAT);
984263bc
MD
1608 if (format) {
1609 finfo = (struct fd_formb *)bp->b_data;
1610 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1611 - (char *)finfo;
1612 }
1613 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
54078292
MD
1614 blknum = (unsigned)(bio->bio_offset / fdblk) +
1615 fd->skip /fdblk;
984263bc
MD
1616 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1617 }
1618 TRACE1("fd%d", fdu);
1619 TRACE1("[%s]", fdstates[fdc->state]);
1620 TRACE1("(0x%x)", fd->flags);
e8b273ff 1621 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
984263bc
MD
1622 switch (fdc->state)
1623 {
1624 case DEVIDLE:
1625 case FINDWORK: /* we have found new work */
1626 fdc->retry = 0;
1627 fd->skip = 0;
1628 fdc->fd = fd;
1629 fdc->fdu = fdu;
1630 fdc->fdctl_wr(fdc, fd->ft->trans);
1631 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1632 /*******************************************************\
1633 * If the next drive has a motor startup pending, then *
1634 * it will start up in its own good time *
1635 \*******************************************************/
1636 if(fd->flags & FD_MOTOR_WAIT) {
1637 fdc->state = MOTORWAIT;
1638 return (0); /* come back later */
1639 }
1640 /*******************************************************\
1641 * Maybe if it's not starting, it SHOULD be starting *
1642 \*******************************************************/
1643 if (!(fd->flags & FD_MOTOR))
1644 {
1645 fdc->state = MOTORWAIT;
1646 fd_turnon(fd);
1647 return (0);
1648 }
1649 else /* at least make sure we are selected */
1650 {
1651 set_motor(fdc, fd->fdsu, TURNON);
1652 }
1653 if (fdc->flags & FDC_NEEDS_RESET) {
1654 fdc->state = RESETCTLR;
1655 fdc->flags &= ~FDC_NEEDS_RESET;
1656 } else
1657 fdc->state = DOSEEK;
1658 break;
1659 case DOSEEK:
1660 if (b_cylinder == (unsigned)fd->track)
1661 {
1662 fdc->state = SEEKCOMPLETE;
1663 break;
1664 }
1665 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1666 fd->fdsu, b_cylinder * fd->ft->steptrac,
1667 0))
1668 {
1669 /*
1670 * seek command not accepted, looks like
1671 * the FDC went off to the Saints...
1672 */
1673 fdc->retry = 6; /* try a reset */
1674 return(retrier(fdc));
1675 }
1676 fd->track = FD_NO_TRACK;
1677 fdc->state = SEEKWAIT;
1678 return(0); /* will return later */
1679 case SEEKWAIT:
1680 /* allow heads to settle */
4fc46503
JS
1681 callout_reset(&fdc->pseudointr_ch, hz / 16,
1682 fd_pseudointr, fdc);
984263bc
MD
1683 fdc->state = SEEKCOMPLETE;
1684 return(0); /* will return later */
1685 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1686 /* Make sure seek really happened*/
1687 if(fd->track == FD_NO_TRACK) {
1688 int descyl = b_cylinder * fd->ft->steptrac;
1689 do {
1690 /*
1691 * This might be a "ready changed" interrupt,
1692 * which cannot really happen since the
1693 * RDY pin is hardwired to + 5 volts. This
1694 * generally indicates a "bouncing" intr
1695 * line, so do one of the following:
1696 *
1697 * When running on an enhanced FDC that is
1698 * known to not go stuck after responding
1699 * with INVALID, fetch all interrupt states
1700 * until seeing either an INVALID or a
1701 * real interrupt condition.
1702 *
1703 * When running on a dumb old NE765, give
1704 * up immediately. The controller will
1705 * provide up to four dummy RC interrupt
1706 * conditions right after reset (for the
1707 * corresponding four drives), so this is
1708 * our only chance to get notice that it
1709 * was not the FDC that caused the interrupt.
1710 */
1711 if (fd_sense_int(fdc, &st0, &cyl)
1712 == FD_NOT_VALID)
1713 return 0;
1714 if(fdc->fdct == FDC_NE765
1715 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1716 return 0; /* hope for a real intr */
1717 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1718
1719 if (0 == descyl) {
1720 int failed = 0;
1721 /*
1722 * seek to cyl 0 requested; make sure we are
1723 * really there
1724 */
1725 if (fd_sense_drive_status(fdc, &st3))
1726 failed = 1;
1727 if ((st3 & NE7_ST3_T0) == 0) {
e3869ec7 1728 kprintf(
984263bc
MD
1729 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1730 fdu, st3, NE7_ST3BITS);
1731 failed = 1;
1732 }
1733
1734 if (failed) {
1735 if(fdc->retry < 3)
1736 fdc->retry = 3;
1737 return (retrier(fdc));
1738 }
1739 }
1740
1741 if (cyl != descyl) {
e3869ec7 1742 kprintf(
984263bc
MD
1743 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1744 fdu, descyl, cyl, st0);
1745 if (fdc->retry < 3)
1746 fdc->retry = 3;
1747 return (retrier(fdc));
1748 }
1749 }
1750
1751 fd->track = b_cylinder;
10f3fee5
MD
1752 if (!(fdc->flags & FDC_NODMA)) {
1753 isa_dmastart(isa_dmabp(bp),
1754 bp->b_data+fd->skip,
984263bc 1755 format ? bp->b_bcount : fdblk, fdc->dmachan);
10f3fee5 1756 }
984263bc
MD
1757 sectrac = fd->ft->sectrac;
1758 sec = blknum % (sectrac * fd->ft->heads);
1759 head = sec / sectrac;
1760 sec = sec % sectrac + 1;
1761 fd->hddrv = ((head&1)<<2)+fdu;
1762
1763 if(format || !read)
1764 {
1765 /* make sure the drive is writable */
1766 if(fd_sense_drive_status(fdc, &st3) != 0)
1767 {
1768 /* stuck controller? */
1769 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1770 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1771 bp->b_data + fd->skip,
1772 format ? bp->b_bcount : fdblk,
1773 fdc->dmachan);
1774 fdc->retry = 6; /* reset the beast */
1775 return (retrier(fdc));
1776 }
1777 if(st3 & NE7_ST3_WP)
1778 {
1779 /*
1780 * XXX YES! this is ugly.
1781 * in order to force the current operation
1782 * to fail, we will have to fake an FDC
1783 * error - all error handling is done
1784 * by the retrier()
1785 */
1786 fdc->status[0] = NE7_ST0_IC_AT;
1787 fdc->status[1] = NE7_ST1_NW;
1788 fdc->status[2] = 0;
1789 fdc->status[3] = fd->track;
1790 fdc->status[4] = head;
1791 fdc->status[5] = sec;
1792 fdc->retry = 8; /* break out immediately */
1793 fdc->state = IOTIMEDOUT; /* not really... */
1794 return (1);
1795 }
1796 }
1797
1798 if (format) {
1799 if (fdc->flags & FDC_NODMA) {
1800 /*
1801 * This seems to be necessary for
1802 * whatever obscure reason; if we omit
1803 * it, we end up filling the sector ID
1804 * fields of the newly formatted track
1805 * entirely with garbage, causing
1806 * `wrong cylinder' errors all over
1807 * the place when trying to read them
1808 * back.
1809 *
1810 * Umpf.
1811 */
1812 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1813
10f3fee5 1814 (void)fdcpio(fdc,bp->b_cmd,
984263bc
MD
1815 bp->b_data+fd->skip,
1816 bp->b_bcount);
1817
1818 }
1819 /* formatting */
1820 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1821 finfo->fd_formb_secshift,
1822 finfo->fd_formb_nsecs,
1823 finfo->fd_formb_gaplen,
1824 finfo->fd_formb_fillbyte, 0)) {
1825 /* controller fell over */
1826 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1827 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1828 bp->b_data + fd->skip,
1829 format ? bp->b_bcount : fdblk,
1830 fdc->dmachan);
1831 fdc->retry = 6;
1832 return (retrier(fdc));
1833 }
1834 } else {
1835 if (fdc->flags & FDC_NODMA) {
1836 /*
1837 * this seems to be necessary even when
1838 * reading data
1839 */
1840 SET_BCDR(fdc, 1, fdblk, 0);
1841
1842 /*
1843 * perform the write pseudo-DMA before
1844 * the WRITE command is sent
1845 */
1846 if (!read)
10f3fee5 1847 (void)fdcpio(fdc,bp->b_cmd,
984263bc
MD
1848 bp->b_data+fd->skip,
1849 fdblk);
1850 }
1851 if (fd_cmd(fdc, 9,
1852 (read ? NE7CMD_READ : NE7CMD_WRITE),
1853 head << 2 | fdu, /* head & unit */
1854 fd->track, /* track */
1855 head,
1856 sec, /* sector + 1 */
1857 fd->ft->secsize, /* sector size */
1858 sectrac, /* sectors/track */
1859 fd->ft->gap, /* gap size */
1860 fd->ft->datalen, /* data length */
1861 0)) {
1862 /* the beast is sleeping again */
1863 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1864 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1865 bp->b_data + fd->skip,
1866 format ? bp->b_bcount : fdblk,
1867 fdc->dmachan);
1868 fdc->retry = 6;
1869 return (retrier(fdc));
1870 }
1871 }
1872 if (fdc->flags & FDC_NODMA)
1873 /*
1874 * if this is a read, then simply await interrupt
1875 * before performing PIO
1876 */
10f3fee5 1877 if (read && !fdcpio(fdc,bp->b_cmd,
984263bc 1878 bp->b_data+fd->skip,fdblk)) {
e8b273ff
MD
1879 callout_reset(&fd->tohandle, hz,
1880 fd_iotimeout, fdc);
984263bc
MD
1881 return(0); /* will return later */
1882 };
1883
1884 /*
1885 * write (or format) operation will fall through and
1886 * await completion interrupt
1887 */
1888 fdc->state = IOCOMPLETE;
e8b273ff 1889 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
984263bc
MD
1890 return (0); /* will return later */
1891 case PIOREAD:
1892 /*
1893 * actually perform the PIO read. The IOCOMPLETE case
1894 * removes the timeout for us.
1895 */
10f3fee5 1896 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
984263bc
MD
1897 fdc->state = IOCOMPLETE;
1898 /* FALLTHROUGH */
1899 case IOCOMPLETE: /* IO DONE, post-analyze */
e8b273ff 1900 callout_stop(&fd->tohandle);
984263bc
MD
1901
1902 if (fd_read_status(fdc, fd->fdsu)) {
10f3fee5
MD
1903 if (!(fdc->flags & FDC_NODMA)) {
1904 isa_dmadone(isa_dmabp(bp),
1905 bp->b_data + fd->skip,
984263bc
MD
1906 format ? bp->b_bcount : fdblk,
1907 fdc->dmachan);
10f3fee5 1908 }
984263bc
MD
1909 if (fdc->retry < 6)
1910 fdc->retry = 6; /* force a reset */
1911 return (retrier(fdc));
1912 }
1913
1914 fdc->state = IOTIMEDOUT;
1915
1916 /* FALLTHROUGH */
1917
1918 case IOTIMEDOUT:
10f3fee5
MD
1919 if (!(fdc->flags & FDC_NODMA)) {
1920 isa_dmadone(isa_dmabp(bp),
1921 bp->b_data + fd->skip,
984263bc 1922 format ? bp->b_bcount : fdblk, fdc->dmachan);
10f3fee5 1923 }
984263bc
MD
1924 if (fdc->status[0] & NE7_ST0_IC) {
1925 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1926 && fdc->status[1] & NE7_ST1_OR) {
1927 /*
1928 * DMA overrun. Someone hogged the bus and
1929 * didn't release it in time for the next
1930 * FDC transfer.
1931 *
1932 * We normally restart this without bumping
1933 * the retry counter. However, in case
1934 * something is seriously messed up (like
1935 * broken hardware), we rather limit the
1936 * number of retries so the IO operation
1937 * doesn't block indefinately.
1938 */
1939 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
1940 fdc->state = SEEKCOMPLETE;
1941 return (1);
1942 } /* else fall through */
1943 }
1944 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
1945 && fdc->retry < 6)
1946 fdc->retry = 6; /* force a reset */
1947 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1948 && fdc->status[2] & NE7_ST2_WC
1949 && fdc->retry < 3)
1950 fdc->retry = 3; /* force recalibrate */
1951 return (retrier(fdc));
1952 }
1953 /* All OK */
1954 /* Operation successful, retry DMA overruns again next time. */
1955 fdc->dma_overruns = 0;
1956 fd->skip += fdblk;
1957 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
1958 /* set up next transfer */
1959 fdc->state = DOSEEK;
1960 } else {
1961 /* ALL DONE */
1962 fd->skip = 0;
81b5c339 1963 fdc->bio = NULL;
984263bc
MD
1964 device_unbusy(fd->dev);
1965 devstat_end_transaction_buf(&fd->device_stats, bp);
81b5c339 1966 biodone(bio);
984263bc
MD
1967 fdc->fd = (fd_p) 0;
1968 fdc->fdu = -1;
1969 fdc->state = FINDWORK;
1970 }
1971 return (1);
1972 case RESETCTLR:
1973 fdc_reset(fdc);
1974 fdc->retry++;
1975 fdc->state = RESETCOMPLETE;
1976 return (0);
1977 case RESETCOMPLETE:
1978 /*
1979 * Discard all the results from the reset so that they
1980 * can't cause an unexpected interrupt later.
1981 */
1982 for (i = 0; i < 4; i++)
1983 (void)fd_sense_int(fdc, &st0, &cyl);
1984 fdc->state = STARTRECAL;
1985 /* Fall through. */
1986 case STARTRECAL:
1987 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
1988 /* arrgl */
1989 fdc->retry = 6;
1990 return (retrier(fdc));
1991 }
1992 fdc->state = RECALWAIT;
1993 return (0); /* will return later */
1994 case RECALWAIT:
1995 /* allow heads to settle */
4fc46503 1996 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
984263bc
MD
1997 fdc->state = RECALCOMPLETE;
1998 return (0); /* will return later */
1999 case RECALCOMPLETE:
2000 do {
2001 /*
2002 * See SEEKCOMPLETE for a comment on this:
2003 */
2004 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2005 return 0;
2006 if(fdc->fdct == FDC_NE765
2007 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2008 return 0; /* hope for a real intr */
2009 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2010 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2011 {
2012 if(fdc->retry > 3)
2013 /*
2014 * a recalibrate from beyond cylinder 77
2015 * will "fail" due to the FDC limitations;
2016 * since people used to complain much about
2017 * the failure message, try not logging
2018 * this one if it seems to be the first
2019 * time in a line
2020 */
e3869ec7 2021 kprintf("fd%d: recal failed ST0 %b cyl %d\n",
984263bc
MD
2022 fdu, st0, NE7_ST0BITS, cyl);
2023 if(fdc->retry < 3) fdc->retry = 3;
2024 return (retrier(fdc));
2025 }
2026 fd->track = 0;
2027 /* Seek (probably) necessary */
2028 fdc->state = DOSEEK;
2029 return (1); /* will return immediatly */
2030 case MOTORWAIT:
2031 if(fd->flags & FD_MOTOR_WAIT)
2032 {
2033 return (0); /* time's not up yet */
2034 }
2035 if (fdc->flags & FDC_NEEDS_RESET) {
2036 fdc->state = RESETCTLR;
2037 fdc->flags &= ~FDC_NEEDS_RESET;
2038 } else {
2039 /*
2040 * If all motors were off, then the controller was
2041 * reset, so it has lost track of the current
2042 * cylinder. Recalibrate to handle this case.
2043 * But first, discard the results of the reset.
2044 */
2045 fdc->state = RESETCOMPLETE;
2046 }
2047 return (1); /* will return immediatly */
2048 default:
2049 device_printf(fdc->fdc_dev, "unexpected FD int->");
2050 if (fd_read_status(fdc, fd->fdsu) == 0)
e3869ec7 2051 kprintf("FDC status :%x %x %x %x %x %x %x ",
984263bc
MD
2052 fdc->status[0],
2053 fdc->status[1],
2054 fdc->status[2],
2055 fdc->status[3],
2056 fdc->status[4],
2057 fdc->status[5],
2058 fdc->status[6] );
2059 else
e3869ec7 2060 kprintf("No status available ");
984263bc
MD
2061 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2062 {
e3869ec7 2063 kprintf("[controller is dead now]\n");
984263bc
MD
2064 return (0);
2065 }
e3869ec7 2066 kprintf("ST0 = %x, PCN = %x\n", st0, cyl);
984263bc
MD
2067 return (0);
2068 }
2069 /*XXX confusing: some branches return immediately, others end up here*/
2070 return (1); /* Come back immediatly to new state */
2071}
2072
2073static int
2074retrier(struct fdc_data *fdc)
2075{
81b5c339 2076 struct bio *bio;
3a1b0fdc 2077 struct buf *bp;
984263bc 2078 struct fd_data *fd;
b13267a5 2079 cdev_t dev;
984263bc
MD
2080 int fdu;
2081
81b5c339
MD
2082 bio = fdc->bio;
2083 bp = bio->bio_buf;
2084 dev = bio->bio_driver_info;
984263bc
MD
2085
2086 /* XXX shouldn't this be cached somewhere? */
81b5c339 2087 fdu = FDUNIT(minor(dev));
984263bc
MD
2088 fd = devclass_get_softc(fd_devclass, fdu);
2089 if (fd->options & FDOPT_NORETRY)
2090 goto fail;
2091
2092 switch (fdc->retry) {
2093 case 0: case 1: case 2:
2094 fdc->state = SEEKCOMPLETE;
2095 break;
2096 case 3: case 4: case 5:
2097 fdc->state = STARTRECAL;
2098 break;
2099 case 6:
2100 fdc->state = RESETCTLR;
2101 break;
2102 case 7:
2103 break;
2104 default:
2105 fail:
2106 {
2107 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
984263bc 2108
e4c9c0c8 2109 if (printerror) {
ee3ad2c9
MD
2110 /*
2111 * note: use the correct device for more
2112 * verbose error reporting.
2113 */
b13267a5 2114 cdev_t subdev;
ee3ad2c9 2115
81b5c339
MD
2116 subdev = make_sub_dev(dev,
2117 (FDUNIT(minor(dev))<<3)|RAW_PART);
2118 diskerr(bio, subdev,
ee3ad2c9 2119 "hard error", LOG_PRINTF,
a688b15c 2120 fdc->fd->skip);
e4c9c0c8 2121 }
984263bc
MD
2122 if (printerror) {
2123 if (fdc->flags & FDC_STAT_VALID)
e3869ec7 2124 kprintf(
984263bc
MD
2125 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2126 fdc->status[0], NE7_ST0BITS,
2127 fdc->status[1], NE7_ST1BITS,
2128 fdc->status[2], NE7_ST2BITS,
2129 fdc->status[3], fdc->status[4],
2130 fdc->status[5]);
2131 else
e3869ec7 2132 kprintf(" (No status)\n");
984263bc
MD
2133 }
2134 }
2135 bp->b_flags |= B_ERROR;
2136 bp->b_error = EIO;
2137 bp->b_resid += bp->b_bcount - fdc->fd->skip;
81b5c339 2138 fdc->bio = NULL;
984263bc
MD
2139 fdc->fd->skip = 0;
2140 device_unbusy(fd->dev);
2141 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
81b5c339 2142 biodone(bio);
984263bc
MD
2143 fdc->state = FINDWORK;
2144 fdc->flags |= FDC_NEEDS_RESET;
2145 fdc->fd = (fd_p) 0;
2146 fdc->fdu = -1;
2147 return (1);
2148 }
2149 fdc->retry++;
2150 return (1);
2151}
2152
014958fd
MD
2153static void
2154fdformat_wakeup(struct bio *bio)
2155{
2156 bio->bio_buf->b_cmd = BUF_CMD_DONE;
2157 wakeup(bio);
2158}
2159
984263bc 2160static int
b13267a5 2161fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred)
984263bc
MD
2162{
2163 fdu_t fdu;
2164 fd_p fd;
984263bc 2165 struct buf *bp;
fbe276c7 2166 int rv = 0;
984263bc
MD
2167 size_t fdblk;
2168
2169 fdu = FDUNIT(minor(dev));
2170 fd = devclass_get_softc(fd_devclass, fdu);
2171 fdblk = 128 << fd->ft->secsize;
2172
2173 /* set up a buffer header for fdstrategy() */
014958fd 2174 bp = getpbuf(NULL);
10f3fee5 2175 bp->b_cmd = BUF_CMD_FORMAT;
984263bc
MD
2176
2177 /*
2178 * calculate a fake blkno, so fdstrategy() would initiate a
2179 * seek to the requested cylinder
2180 */
54078292
MD
2181 bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
2182 (fd->ft->sectrac * fd->ft->heads)
2183 + finfo->head * fd->ft->sectrac) * fdblk;
81b5c339 2184 bp->b_bio1.bio_driver_info = dev;
014958fd 2185 bp->b_bio1.bio_done = fdformat_wakeup;
984263bc
MD
2186
2187 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2188 bp->b_data = (caddr_t)finfo;
2189
2190 /* now do the format */
81b5c339 2191 dev_dstrategy(dev, &bp->b_bio1);
984263bc
MD
2192
2193 /* ...and wait for it to complete */
fbe276c7 2194 crit_enter();
10f3fee5 2195 while (bp->b_cmd != BUF_CMD_DONE) {
014958fd 2196 rv = tsleep(&bp->b_bio1, 0, "fdform", 20 * hz);
984263bc
MD
2197 if (rv == EWOULDBLOCK)
2198 break;
2199 }
fbe276c7 2200 crit_exit();
984263bc
MD
2201
2202 if (rv == EWOULDBLOCK) {
2203 /* timed out */
2204 rv = EIO;
2205 device_unbusy(fd->dev);
81b5c339 2206 biodone(&bp->b_bio1);
984263bc
MD
2207 }
2208 if (bp->b_flags & B_ERROR)
2209 rv = bp->b_error;
2210 /*
2211 * allow the process to be swapped
2212 */
014958fd 2213 relpbuf(bp, NULL);
984263bc
MD
2214 return rv;
2215}
2216
2217/*
2218 * TODO: don't allocate buffer on stack.
2219 */
2220
2221static int
fef8985e 2222fdioctl(struct dev_ioctl_args *ap)
984263bc 2223{
b13267a5 2224 cdev_t dev = ap->a_head.a_dev;
984263bc
MD
2225 fdu_t fdu = FDUNIT(minor(dev));
2226 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2227 size_t fdblk;
2228
2229 struct fd_type *fdt;
2230 struct disklabel *dl;
2231 struct fdc_status *fsp;
2232 char buffer[DEV_BSIZE];
2233 int error = 0;
2234
2235 fdblk = 128 << fd->ft->secsize;
2236
fef8985e 2237 switch (ap->a_cmd) {
984263bc
MD
2238 case DIOCGDINFO:
2239 bzero(buffer, sizeof (buffer));
2240 dl = (struct disklabel *)buffer;
2241 dl->d_secsize = fdblk;
2242 fdt = fd->ft;
2243 dl->d_secpercyl = fdt->size / fdt->tracks;
2244 dl->d_type = DTYPE_FLOPPY;
2245
2246 if (readdisklabel(dev, dl)
2247 == NULL)
2248 error = 0;
2249 else
2250 error = EINVAL;
2251
fef8985e 2252 *(struct disklabel *)ap->a_data = *dl;
984263bc
MD
2253 break;
2254
2255 case DIOCSDINFO:
fef8985e 2256 if ((ap->a_fflag & FWRITE) == 0)
984263bc
MD
2257 error = EBADF;
2258 break;
2259
2260 case DIOCWLABEL:
fef8985e 2261 if ((ap->a_fflag & FWRITE) == 0)
984263bc
MD
2262 error = EBADF;
2263 break;
2264
2265 case DIOCWDINFO:
fef8985e 2266 if ((ap->a_fflag & FWRITE) == 0) {
984263bc
MD
2267 error = EBADF;
2268 break;
2269 }
2270
fef8985e 2271 dl = (struct disklabel *)ap->a_data;
984263bc
MD
2272
2273 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2274 (u_long)0)) != 0)
2275 break;
2276
2277 error = writedisklabel(dev, (struct disklabel *)buffer);
2278 break;
2279 case FD_FORM:
fef8985e 2280 if ((ap->a_fflag & FWRITE) == 0)
984263bc 2281 error = EBADF; /* must be opened for writing */
fef8985e 2282 else if (((struct fd_formb *)ap->a_data)->format_version !=
984263bc
MD
2283 FD_FORMAT_VERSION)
2284 error = EINVAL; /* wrong version of formatting prog */
2285 else
fef8985e 2286 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred);
984263bc
MD
2287 break;
2288
2289 case FD_GTYPE: /* get drive type */
fef8985e 2290 *(struct fd_type *)ap->a_data = *fd->ft;
984263bc
MD
2291 break;
2292
2293 case FD_STYPE: /* set drive type */
2294 /* this is considered harmful; only allow for superuser */
fef8985e 2295 if (suser_cred(ap->a_cred, 0) != 0)
984263bc 2296 return EPERM;
fef8985e 2297 *fd->ft = *(struct fd_type *)ap->a_data;
984263bc
MD
2298 break;
2299
2300 case FD_GOPTS: /* get drive options */
fef8985e 2301 *(int *)ap->a_data = fd->options;
984263bc
MD
2302 break;
2303
2304 case FD_SOPTS: /* set drive options */
fef8985e 2305 fd->options = *(int *)ap->a_data;
984263bc
MD
2306 break;
2307
2308 case FD_GSTAT:
fef8985e 2309 fsp = (struct fdc_status *)ap->a_data;
984263bc
MD
2310 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2311 return EINVAL;
2312 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2313 break;
2314
2315 default:
2316 error = ENOTTY;
2317 break;
2318 }
2319 return (error);
2320}
2321
2322/*
2323 * Hello emacs, these are the
2324 * Local Variables:
2325 * c-indent-level: 8
2326 * c-continued-statement-offset: 8
2327 * c-continued-brace-offset: 0
2328 * c-brace-offset: -8
2329 * c-brace-imaginary-offset: 0
2330 * c-argdecl-indent: 8
2331 * c-label-offset: -8
2332 * c++-hanging-braces: 1
2333 * c++-access-specifier-offset: -8
2334 * c++-empty-arglist-indent: 8
2335 * c++-friend-offset: 0
2336 * End:
2337 */