Silence warnings regarding yyunput being defined and never used.
[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 $
efda3bd0 54 * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.32 2006/09/05 00:55:37 dillon Exp $
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55 *
56 */
57
58#include "opt_fdc.h"
666d2603 59#include "use_pccard.h"
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60
61#include <sys/param.h>
62#include <sys/systm.h>
fabb8ceb 63#include <sys/bootmaj.h>
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64#include <sys/kernel.h>
65#include <sys/buf.h>
66#include <sys/bus.h>
67#include <sys/conf.h>
68#include <sys/disklabel.h>
69#include <sys/devicestat.h>
70#include <sys/fcntl.h>
71#include <sys/malloc.h>
72#include <sys/module.h>
73#include <sys/proc.h>
74#include <sys/syslog.h>
335dda38 75#include <sys/device.h>
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76
77#include <sys/bus.h>
78#include <machine/bus.h>
79#include <sys/rman.h>
80
3020e3be 81#include <sys/buf2.h>
fbe276c7 82#include <sys/thread2.h>
3020e3be 83
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84#include <machine/clock.h>
85#include <machine/ioctl_fd.h>
86#include <machine/resource.h>
87#include <machine/stdarg.h>
88
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89#include <bus/isa/isavar.h>
90#include <bus/isa/isareg.h>
91#include "fdreg.h"
92#include "fdc.h"
93#include <bus/isa/rtc.h>
984263bc 94
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95/* configuration flags */
96#define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
97#define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
98
99/* internally used only, not really from CMOS: */
100#define RTCFDT_144M_PRETENDED 0x1000
101
102/* error returns for fd_cmd() */
103#define FD_FAILED -1
104#define FD_NOT_VALID -2
105#define FDC_ERRMAX 100 /* do not log more */
106/*
107 * Stop retrying after this many DMA overruns. Since each retry takes
108 * one revolution, with 300 rpm., 25 retries take approximately 10
109 * seconds which the read attempt will block in case the DMA overrun
110 * is persistent.
111 */
112#define FDC_DMAOV_MAX 25
113
114/*
115 * Timeout value for the PIO loops to wait until the FDC main status
116 * register matches our expectations (request for master, direction
117 * bit). This is supposed to be a number of microseconds, although
118 * timing might actually not be very accurate.
119 *
120 * Timeouts of 100 msec are believed to be required for some broken
121 * (old) hardware.
122 */
123#define FDSTS_TIMEOUT 100000
124
125#define NUMTYPES 17
126#define NUMDENS (NUMTYPES - 7)
127
128/* These defines (-1) must match index for fd_types */
129#define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
130#define NO_TYPE 0 /* must match NO_TYPE in ft.c */
131#define FD_1720 1
132#define FD_1480 2
133#define FD_1440 3
134#define FD_1200 4
135#define FD_820 5
136#define FD_800 6
137#define FD_720 7
138#define FD_360 8
139#define FD_640 9
140#define FD_1232 10
141
142#define FD_1480in5_25 11
143#define FD_1440in5_25 12
144#define FD_820in5_25 13
145#define FD_800in5_25 14
146#define FD_720in5_25 15
147#define FD_360in5_25 16
148#define FD_640in5_25 17
149
150
151static struct fd_type fd_types[NUMTYPES] =
152{
153{ 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
154{ 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
155{ 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
156{ 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
157{ 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
158{ 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
159{ 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
160{ 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
161{ 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
162{ 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
163
164{ 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
165{ 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
166{ 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
167{ 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
168{ 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
169{ 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
170{ 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
171};
172
173#define DRVS_PER_CTLR 2 /* 2 floppies */
174
175/***********************************************************************\
176* Per controller structure. *
177\***********************************************************************/
8c5c0470 178devclass_t fdc_devclass;
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179
180/***********************************************************************\
181* Per drive structure. *
182* N per controller (DRVS_PER_CTLR) *
183\***********************************************************************/
184struct fd_data {
185 struct fdc_data *fdc; /* pointer to controller structure */
186 int fdsu; /* this units number on this controller */
187 int type; /* Drive type (FD_1440...) */
188 struct fd_type *ft; /* pointer to the type descriptor */
189 int flags;
190#define FD_OPEN 0x01 /* it's open */
191#define FD_ACTIVE 0x02 /* it's active */
192#define FD_MOTOR 0x04 /* motor should be on */
193#define FD_MOTOR_WAIT 0x08 /* motor coming up */
194 int skip;
195 int hddrv;
196#define FD_NO_TRACK -2
197 int track; /* where we think the head is */
198 int options; /* user configurable options, see ioctl_fd.h */
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199 struct callout toffhandle;
200 struct callout tohandle;
4fc46503 201 struct callout motor;
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202 struct devstat device_stats;
203 device_t dev;
204 fdu_t fdu;
205};
206
207struct fdc_ivars {
208 int fdunit;
209};
210static devclass_t fd_devclass;
211
212/***********************************************************************\
213* Throughout this file the following conventions will be used: *
214* fd is a pointer to the fd_data struct for the drive in question *
215* fdc is a pointer to the fdc_data struct for the controller *
216* fdu is the floppy drive unit number *
217* fdcu is the floppy controller unit number *
218* fdsu is the floppy drive unit number on that controller. (sub-unit) *
219\***********************************************************************/
220
221/* internal functions */
222static void fdc_intr(void *);
223static void set_motor(struct fdc_data *, int, int);
224# define TURNON 1
225# define TURNOFF 0
226static timeout_t fd_turnoff;
227static timeout_t fd_motor_on;
228static void fd_turnon(struct fd_data *);
229static void fdc_reset(fdc_p);
230static int fd_in(struct fdc_data *, int *);
231static int out_fdc(struct fdc_data *, int);
232static void fdstart(struct fdc_data *);
233static timeout_t fd_iotimeout;
234static timeout_t fd_pseudointr;
235static int fdstate(struct fdc_data *);
236static int retrier(struct fdc_data *);
fef8985e 237static int fdformat(dev_t, struct fd_formb *, struct ucred *);
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238
239static int enable_fifo(fdc_p fdc);
240
241static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
242
243
244#define DEVIDLE 0
245#define FINDWORK 1
246#define DOSEEK 2
247#define SEEKCOMPLETE 3
248#define IOCOMPLETE 4
249#define RECALCOMPLETE 5
250#define STARTRECAL 6
251#define RESETCTLR 7
252#define SEEKWAIT 8
253#define RECALWAIT 9
254#define MOTORWAIT 10
255#define IOTIMEDOUT 11
256#define RESETCOMPLETE 12
257#define PIOREAD 13
258
259#ifdef FDC_DEBUG
260static char const * const fdstates[] =
261{
262"DEVIDLE",
263"FINDWORK",
264"DOSEEK",
265"SEEKCOMPLETE",
266"IOCOMPLETE",
267"RECALCOMPLETE",
268"STARTRECAL",
269"RESETCTLR",
270"SEEKWAIT",
271"RECALWAIT",
272"MOTORWAIT",
273"IOTIMEDOUT",
274"RESETCOMPLETE",
275"PIOREAD",
276};
277
278/* CAUTION: fd_debug causes huge amounts of logging output */
279static int volatile fd_debug = 0;
280#define TRACE0(arg) if(fd_debug) printf(arg)
281#define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2)
282#else /* FDC_DEBUG */
283#define TRACE0(arg)
284#define TRACE1(arg1, arg2)
285#endif /* FDC_DEBUG */
286
8c5c0470 287void
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288fdout_wr(fdc_p fdc, u_int8_t v)
289{
290 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
291}
292
293static u_int8_t
294fdsts_rd(fdc_p fdc)
295{
296 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
297}
298
299static void
300fddata_wr(fdc_p fdc, u_int8_t v)
301{
302 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
303}
304
305static u_int8_t
306fddata_rd(fdc_p fdc)
307{
308 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
309}
310
311static void
312fdctl_wr_isa(fdc_p fdc, u_int8_t v)
313{
314 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
315}
316
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317#if 0
318
319static u_int8_t
320fdin_rd(fdc_p fdc)
321{
322 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
323}
324
325#endif
326
327static d_open_t Fdopen; /* NOTE, not fdopen */
328static d_close_t fdclose;
329static d_ioctl_t fdioctl;
330static d_strategy_t fdstrategy;
331
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332static struct dev_ops fd_ops = {
333 { "fd", FD_CDEV_MAJOR, D_DISK },
334 .d_open = Fdopen,
335 .d_close = fdclose,
336 .d_read = physread,
337 .d_write = physwrite,
338 .d_ioctl = fdioctl,
339 .d_strategy = fdstrategy,
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340};
341
342static int
343fdc_err(struct fdc_data *fdc, const char *s)
344{
345 fdc->fdc_errs++;
346 if (s) {
347 if (fdc->fdc_errs < FDC_ERRMAX)
348 device_printf(fdc->fdc_dev, "%s", s);
349 else if (fdc->fdc_errs == FDC_ERRMAX)
350 device_printf(fdc->fdc_dev, "too many errors, not "
351 "logging any more\n");
352 }
353
354 return FD_FAILED;
355}
356
357/*
358 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
359 * Unit number,
360 * # of output bytes, output bytes as ints ...,
361 * # of input bytes, input bytes as ints ...
362 */
8c5c0470 363int
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364fd_cmd(struct fdc_data *fdc, int n_out, ...)
365{
366 u_char cmd;
367 int n_in;
368 int n;
e2565a42 369 __va_list ap;
984263bc 370
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371 __va_start(ap, n_out);
372 cmd = (u_char)(__va_arg(ap, int));
373 __va_end(ap);
374 __va_start(ap, n_out);
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375 for (n = 0; n < n_out; n++)
376 {
e2565a42 377 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
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378 {
379 char msg[50];
380 snprintf(msg, sizeof(msg),
381 "cmd %x failed at out byte %d of %d\n",
382 cmd, n + 1, n_out);
383 return fdc_err(fdc, msg);
384 }
385 }
e2565a42 386 n_in = __va_arg(ap, int);
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387 for (n = 0; n < n_in; n++)
388 {
e2565a42 389 int *ptr = __va_arg(ap, int *);
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390 if (fd_in(fdc, ptr) < 0)
391 {
392 char msg[50];
393 snprintf(msg, sizeof(msg),
394 "cmd %02x failed at in byte %d of %d\n",
395 cmd, n + 1, n_in);
396 return fdc_err(fdc, msg);
397 }
398 }
399
400 return 0;
401}
402
403static int
404enable_fifo(fdc_p fdc)
405{
406 int i, j;
407
408 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
409
410 /*
411 * XXX:
412 * Cannot use fd_cmd the normal way here, since
413 * this might be an invalid command. Thus we send the
414 * first byte, and check for an early turn of data directon.
415 */
416
417 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
418 return fdc_err(fdc, "Enable FIFO failed\n");
419
420 /* If command is invalid, return */
421 j = FDSTS_TIMEOUT;
422 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
423 != NE7_RQM && j-- > 0) {
424 if (i == (NE7_DIO | NE7_RQM)) {
425 fdc_reset(fdc);
426 return FD_FAILED;
427 }
428 DELAY(1);
429 }
430 if (j<0 ||
431 fd_cmd(fdc, 3,
432 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
433 fdc_reset(fdc);
434 return fdc_err(fdc, "Enable FIFO failed\n");
435 }
436 fdc->flags |= FDC_HAS_FIFO;
437 return 0;
438 }
439 if (fd_cmd(fdc, 4,
440 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
441 return fdc_err(fdc, "Re-enable FIFO failed\n");
442 return 0;
443}
444
445static int
446fd_sense_drive_status(fdc_p fdc, int *st3p)
447{
448 int st3;
449
450 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
451 {
452 return fdc_err(fdc, "Sense Drive Status failed\n");
453 }
454 if (st3p)
455 *st3p = st3;
456
457 return 0;
458}
459
460static int
461fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
462{
463 int cyl, st0, ret;
464
465 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
466 if (ret) {
467 (void)fdc_err(fdc,
468 "sense intr err reading stat reg 0\n");
469 return ret;
470 }
471
472 if (st0p)
473 *st0p = st0;
474
475 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
476 /*
477 * There doesn't seem to have been an interrupt.
478 */
479 return FD_NOT_VALID;
480 }
481
482 if (fd_in(fdc, &cyl) < 0) {
483 return fdc_err(fdc, "can't get cyl num\n");
484 }
485
486 if (cylp)
487 *cylp = cyl;
488
489 return 0;
490}
491
492
493static int
494fd_read_status(fdc_p fdc, int fdsu)
495{
496 int i, ret;
497
498 for (i = 0; i < 7; i++) {
499 /*
500 * XXX types are poorly chosen. Only bytes can by read
501 * from the hardware, but fdc->status[] wants u_ints and
502 * fd_in() gives ints.
503 */
504 int status;
505
506 ret = fd_in(fdc, &status);
507 fdc->status[i] = status;
508 if (ret != 0)
509 break;
510 }
511
512 if (ret == 0)
513 fdc->flags |= FDC_STAT_VALID;
514 else
515 fdc->flags &= ~FDC_STAT_VALID;
516
517 return ret;
518}
519
520/****************************************************************************/
521/* autoconfiguration stuff */
522/****************************************************************************/
523
8c5c0470 524int
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525fdc_alloc_resources(struct fdc_data *fdc)
526{
527 device_t dev;
528 int ispnp, ispcmcia;
529
530 dev = fdc->fdc_dev;
531 ispnp = (fdc->flags & FDC_ISPNP) != 0;
532 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
533 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
534 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
535
536 /*
537 * On standard ISA, we don't just use an 8 port range
538 * (e.g. 0x3f0-0x3f7) since that covers an IDE control
539 * register at 0x3f6.
540 *
541 * Isn't PC hardware wonderful.
542 *
543 * The Y-E Data PCMCIA FDC doesn't have this problem, it
544 * uses the register with offset 6 for pseudo-DMA, and the
545 * one with offset 7 as control register.
546 */
547 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
548 &fdc->rid_ioport, 0ul, ~0ul,
549 ispcmcia ? 8 : (ispnp ? 1 : 6),
550 RF_ACTIVE);
551 if (fdc->res_ioport == 0) {
552 device_printf(dev, "cannot reserve I/O port range\n");
553 return ENXIO;
554 }
555 fdc->portt = rman_get_bustag(fdc->res_ioport);
556 fdc->porth = rman_get_bushandle(fdc->res_ioport);
557
558 if (!ispcmcia) {
559 /*
560 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
561 * and some at 0x3f0-0x3f5,0x3f7. We detect the former
562 * by checking the size and adjust the port address
563 * accordingly.
564 */
565 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
566 fdc->port_off = -2;
567
568 /*
569 * Register the control port range as rid 1 if it
570 * isn't there already. Most PnP BIOSen will have
571 * already done this but non-PnP configurations don't.
572 *
573 * And some (!!) report 0x3f2-0x3f5 and completely
574 * leave out the control register! It seems that some
575 * non-antique controller chips have a different
576 * method of programming the transfer speed which
577 * doesn't require the control register, but it's
578 * mighty bogus as the chip still responds to the
579 * address for the control register.
580 */
581 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
582 u_long ctlstart;
583
584 /* Find the control port, usually 0x3f7 */
585 ctlstart = rman_get_start(fdc->res_ioport) +
586 fdc->port_off + 7;
587
588 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
589 }
590
591 /*
592 * Now (finally!) allocate the control port.
593 */
594 fdc->rid_ctl = 1;
595 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
596 &fdc->rid_ctl,
597 0ul, ~0ul, 1, RF_ACTIVE);
598 if (fdc->res_ctl == 0) {
599 device_printf(dev,
600 "cannot reserve control I/O port range\n");
601 return ENXIO;
602 }
603 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
604 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
605 }
606
607 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
608 &fdc->rid_irq, 0ul, ~0ul, 1,
609 RF_ACTIVE);
610 if (fdc->res_irq == 0) {
611 device_printf(dev, "cannot reserve interrupt line\n");
612 return ENXIO;
613 }
614
615 if ((fdc->flags & FDC_NODMA) == 0) {
616 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
617 &fdc->rid_drq, 0ul, ~0ul, 1,
618 RF_ACTIVE);
619 if (fdc->res_drq == 0) {
620 device_printf(dev, "cannot reserve DMA request line\n");
621 return ENXIO;
622 }
623 fdc->dmachan = fdc->res_drq->r_start;
624 }
625
626 return 0;
627}
628
8c5c0470 629void
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630fdc_release_resources(struct fdc_data *fdc)
631{
632 device_t dev;
633
634 dev = fdc->fdc_dev;
635 if (fdc->res_irq != 0) {
636 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
637 fdc->res_irq);
638 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
639 fdc->res_irq);
640 }
641 if (fdc->res_ctl != 0) {
642 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
643 fdc->res_ctl);
644 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
645 fdc->res_ctl);
646 }
647 if (fdc->res_ioport != 0) {
648 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
649 fdc->res_ioport);
650 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
651 fdc->res_ioport);
652 }
653 if (fdc->res_drq != 0) {
654 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
655 fdc->res_drq);
656 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
657 fdc->res_drq);
658 }
659}
660
661/****************************************************************************/
662/* autoconfiguration stuff */
663/****************************************************************************/
664
665static struct isa_pnp_id fdc_ids[] = {
666 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
667 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
668 {0}
669};
670
8c5c0470 671int
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672fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
673{
674 struct fdc_ivars *ivars = device_get_ivars(child);
675
676 switch (which) {
677 case FDC_IVAR_FDUNIT:
678 *result = ivars->fdunit;
679 break;
680 default:
681 return ENOENT;
682 }
683 return 0;
684}
685
686/*
687 * fdc controller section.
688 */
689static int
690fdc_probe(device_t dev)
691{
692 int error, ic_type;
693 struct fdc_data *fdc;
694
695 fdc = device_get_softc(dev);
696 bzero(fdc, sizeof *fdc);
697 fdc->fdc_dev = dev;
698 fdc->fdctl_wr = fdctl_wr_isa;
699
700 /* Check pnp ids */
701 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
702 if (error == ENXIO)
703 return ENXIO;
704 if (error == 0)
705 fdc->flags |= FDC_ISPNP;
706
707 /* Attempt to allocate our resources for the duration of the probe */
708 error = fdc_alloc_resources(fdc);
709 if (error)
710 goto out;
711
712 /* First - lets reset the floppy controller */
713 fdout_wr(fdc, 0);
714 DELAY(100);
715 fdout_wr(fdc, FDO_FRST);
716
717 /* see if it can handle a command */
718 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
719 NE7_SPEC_2(2, 0), 0)) {
720 error = ENXIO;
721 goto out;
722 }
723
724 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
725 ic_type = (u_char)ic_type;
726 switch (ic_type) {
727 case 0x80:
728 device_set_desc(dev, "NEC 765 or clone");
729 fdc->fdct = FDC_NE765;
730 break;
731 case 0x81:
732 device_set_desc(dev, "Intel 82077 or clone");
733 fdc->fdct = FDC_I82077;
734 break;
735 case 0x90:
736 device_set_desc(dev, "NEC 72065B or clone");
737 fdc->fdct = FDC_NE72065;
738 break;
739 default:
740 device_set_desc(dev, "generic floppy controller");
741 fdc->fdct = FDC_UNKNOWN;
742 break;
743 }
744 }
745
746out:
747 fdc_release_resources(fdc);
748 return (error);
749}
750
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751/*
752 * Add a child device to the fdc controller. It will then be probed etc.
753 */
754static void
755fdc_add_child(device_t dev, const char *name, int unit)
756{
757 int disabled;
758 struct fdc_ivars *ivar;
759 device_t child;
760
efda3bd0 761 ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
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762 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
763 ivar->fdunit = 0;
764 child = device_add_child(dev, name, unit);
765 if (child == NULL)
766 return;
767 device_set_ivars(child, ivar);
768 if (resource_int_value(name, unit, "disabled", &disabled) == 0
769 && disabled != 0)
770 device_disable(child);
771}
772
8c5c0470 773int
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774fdc_attach(device_t dev)
775{
776 struct fdc_data *fdc;
777 int i, error;
778
779 fdc = device_get_softc(dev);
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780
781 callout_init(&fdc->pseudointr_ch);
782
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783 error = fdc_alloc_resources(fdc);
784 if (error) {
785 device_printf(dev, "cannot re-aquire resources\n");
786 return error;
787 }
788 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
ee61f228 789 0, fdc_intr, fdc,
e9cb6d99 790 &fdc->fdc_intr, NULL);
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791 if (error) {
792 device_printf(dev, "cannot setup interrupt\n");
793 return error;
794 }
795 fdc->fdcu = device_get_unit(dev);
796 fdc->flags |= FDC_ATTACHED;
797
798 if ((fdc->flags & FDC_NODMA) == 0) {
799 /* Acquire the DMA channel forever, The driver will do the rest */
800 /* XXX should integrate with rman */
801 isa_dma_acquire(fdc->dmachan);
802 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
803 }
804 fdc->state = DEVIDLE;
805
806 /* reset controller, turn motor off, clear fdout mirror reg */
807 fdout_wr(fdc, ((fdc->fdout = 0)));
81b5c339 808 bioq_init(&fdc->bio_queue);
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809
810 /*
811 * Probe and attach any children. We should probably detect
812 * devices from the BIOS unless overridden.
813 */
814 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
815 i != -1;
816 i = resource_query_string(i, "at", device_get_nameunit(dev)))
817 fdc_add_child(dev, resource_query_name(i),
818 resource_query_unit(i));
819
820 return (bus_generic_attach(dev));
821}
822
8c5c0470 823int
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824fdc_print_child(device_t me, device_t child)
825{
826 int retval = 0;
827
828 retval += bus_print_child_header(me, child);
829 retval += printf(" on %s drive %d\n", device_get_nameunit(me),
830 fdc_get_fdunit(child));
831
832 return (retval);
833}
834
835static device_method_t fdc_methods[] = {
836 /* Device interface */
837 DEVMETHOD(device_probe, fdc_probe),
838 DEVMETHOD(device_attach, fdc_attach),
839 DEVMETHOD(device_detach, bus_generic_detach),
840 DEVMETHOD(device_shutdown, bus_generic_shutdown),
841 DEVMETHOD(device_suspend, bus_generic_suspend),
842 DEVMETHOD(device_resume, bus_generic_resume),
843
844 /* Bus interface */
845 DEVMETHOD(bus_print_child, fdc_print_child),
846 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
847 /* Our children never use any other bus interface methods. */
848
849 { 0, 0 }
850};
851
852static driver_t fdc_driver = {
853 "fdc",
854 fdc_methods,
855 sizeof(struct fdc_data)
856};
857
858DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
859
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860/******************************************************************/
861/*
862 * devices attached to the controller section.
863 */
864static int
865fd_probe(device_t dev)
866{
867 int i;
868 u_int fdt, st0, st3;
869 struct fd_data *fd;
870 struct fdc_data *fdc;
871 fdsu_t fdsu;
872 static int fd_fifo = 0;
873
874 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
875 fd = device_get_softc(dev);
876 fdc = device_get_softc(device_get_parent(dev));
877
878 bzero(fd, sizeof *fd);
879 fd->dev = dev;
880 fd->fdc = fdc;
881 fd->fdsu = fdsu;
882 fd->fdu = device_get_unit(dev);
883
884#ifdef __i386__
885 /* look up what bios thinks we have */
886 switch (fd->fdu) {
887 case 0:
888 if ((fdc->flags & FDC_ISPCMCIA))
889 fdt = RTCFDT_144M;
890 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
891 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
892 else
893 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
894 break;
895 case 1:
896 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
897 break;
898 default:
899 fdt = RTCFDT_NONE;
900 break;
901 }
902#else
903 fdt = RTCFDT_144M; /* XXX probably */
904#endif
905
906 /* is there a unit? */
907 if (fdt == RTCFDT_NONE)
908 return (ENXIO);
909
910 /* select it */
911 set_motor(fdc, fdsu, TURNON);
912 DELAY(1000000); /* 1 sec */
913
914 /* XXX This doesn't work before the first set_motor() */
915 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
916 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
917 && enable_fifo(fdc) == 0) {
918 device_printf(device_get_parent(dev),
919 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
920 }
921 fd_fifo = 1;
922
923 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
924 && (st3 & NE7_ST3_T0)) {
925 /* if at track 0, first seek inwards */
926 /* seek some steps: */
927 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
928 DELAY(300000); /* ...wait a moment... */
929 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
930 }
931
932 /* If we're at track 0 first seek inwards. */
933 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
934 /* Seek some steps... */
935 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
936 /* ...wait a moment... */
937 DELAY(300000);
938 /* make ctrlr happy: */
939 fd_sense_int(fdc, 0, 0);
940 }
941 }
942
943 for (i = 0; i < 2; i++) {
944 /*
945 * we must recalibrate twice, just in case the
946 * heads have been beyond cylinder 76, since most
947 * FDCs still barf when attempting to recalibrate
948 * more than 77 steps
949 */
950 /* go back to 0: */
951 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
952 /* a second being enough for full stroke seek*/
953 DELAY(i == 0 ? 1000000 : 300000);
954
955 /* anything responding? */
956 if (fd_sense_int(fdc, &st0, 0) == 0 &&
957 (st0 & NE7_ST0_EC) == 0)
958 break; /* already probed succesfully */
959 }
960 }
961
962 set_motor(fdc, fdsu, TURNOFF);
963
964 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
965 return (ENXIO);
966
967 fd->track = FD_NO_TRACK;
968 fd->fdc = fdc;
969 fd->fdsu = fdsu;
970 fd->options = 0;
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971 callout_init(&fd->toffhandle);
972 callout_init(&fd->tohandle);
4fc46503 973 callout_init(&fd->motor);
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974
975 switch (fdt) {
976 case RTCFDT_12M:
977 device_set_desc(dev, "1200-KB 5.25\" drive");
978 fd->type = FD_1200;
979 break;
980 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
981 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
982 fdt = RTCFDT_144M;
983 fd->type = FD_1440;
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:
998 printf("720-KB 3.5\" drive");
999 fd->type = FD_720;
1000 break;
1001 default:
1002 return (ENXIO);
1003 }
1004 return (0);
1005}
1006
1007static int
1008fd_attach(device_t dev)
1009{
1010 struct fd_data *fd;
1011#if 0
1012 int i;
1013 int mynor;
1014 int typemynor;
1015 int typesize;
1016#endif
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1017
1018 fd = device_get_softc(dev);
1019
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1020 dev_ops_add(&fd_ops, -1 << 6, fd->fdu << 6);
1021 make_dev(&fd_ops, (fd->fdu << 6),
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1022 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu);
1023
1024#if 0
1025 /* Other make_dev() go here. */
1026#endif
1027
1028 /*
1029 * Export the drive to the devstat interface.
1030 */
1031 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1032 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1033 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1034 DEVSTAT_PRIORITY_FD);
1035 return (0);
1036}
1037
1038static int
1039fd_detach(device_t dev)
1040{
1041 struct fd_data *fd;
1042
1043 fd = device_get_softc(dev);
e8b273ff 1044 callout_stop(&fd->toffhandle);
4fc46503 1045 callout_stop(&fd->motor);
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1046
1047 return (0);
1048}
1049
1050static device_method_t fd_methods[] = {
1051 /* Device interface */
1052 DEVMETHOD(device_probe, fd_probe),
1053 DEVMETHOD(device_attach, fd_attach),
1054 DEVMETHOD(device_detach, fd_detach),
1055 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1056 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1057 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1058
1059 { 0, 0 }
1060};
1061
1062static driver_t fd_driver = {
1063 "fd",
1064 fd_methods,
1065 sizeof(struct fd_data)
1066};
1067
1068DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1069
1070/****************************************************************************/
1071/* motor control stuff */
1072/* remember to not deselect the drive we're working on */
1073/****************************************************************************/
1074static void
1075set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1076{
1077 int fdout = fdc->fdout;
1078 int needspecify = 0;
1079
1080 if(turnon) {
1081 fdout &= ~FDO_FDSEL;
1082 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1083 } else
1084 fdout &= ~(FDO_MOEN0 << fdsu);
1085
1086 if(!turnon
1087 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1088 /* gonna turn off the last drive, put FDC to bed */
1089 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1090 else {
1091 /* make sure controller is selected and specified */
1092 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1093 needspecify = 1;
1094 fdout |= (FDO_FRST|FDO_FDMAEN);
1095 }
1096
1097 fdout_wr(fdc, fdout);
1098 fdc->fdout = fdout;
1099 TRACE1("[0x%x->FDOUT]", fdout);
1100
1101 if (needspecify) {
1102 /*
1103 * XXX
1104 * special case: since we have just woken up the FDC
1105 * from its sleep, we silently assume the command will
1106 * be accepted, and do not test for a timeout
1107 */
1108 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1109 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1110 0);
1111 if (fdc->flags & FDC_HAS_FIFO)
1112 (void) enable_fifo(fdc);
1113 }
1114}
1115
1116static void
1117fd_turnoff(void *xfd)
1118{
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1119 fd_p fd = xfd;
1120
1121 TRACE1("[fd%d: turnoff]", fd->fdu);
1122
fbe276c7 1123 crit_enter();
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MD
1124 /*
1125 * Don't turn off the motor yet if the drive is active.
1126 *
1127 * If we got here, this could only mean we missed an interrupt.
1128 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1129 * after a controller reset. Just schedule a pseudo-interrupt
1130 * so the state machine gets re-entered.
1131 */
1132 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1133 fdc_intr(fd->fdc);
fbe276c7 1134 crit_exit();
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1135 return;
1136 }
1137
1138 fd->flags &= ~FD_MOTOR;
1139 set_motor(fd->fdc, fd->fdsu, TURNOFF);
fbe276c7 1140 crit_exit();
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1141}
1142
1143static void
1144fd_motor_on(void *xfd)
1145{
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1146 fd_p fd = xfd;
1147
fbe276c7 1148 crit_enter();
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1149 fd->flags &= ~FD_MOTOR_WAIT;
1150 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1151 {
1152 fdc_intr(fd->fdc);
1153 }
fbe276c7 1154 crit_exit();
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1155}
1156
1157static void
1158fd_turnon(fd_p fd)
1159{
1160 if(!(fd->flags & FD_MOTOR))
1161 {
1162 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1163 set_motor(fd->fdc, fd->fdsu, TURNON);
4fc46503 1164 callout_reset(&fd->motor, hz, fd_motor_on, fd);
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1165 }
1166}
1167
1168static void
1169fdc_reset(fdc_p fdc)
1170{
1171 /* Try a reset, keep motor on */
1172 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1173 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1174 DELAY(100);
1175 /* enable FDC, but defer interrupts a moment */
1176 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1177 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1178 DELAY(100);
1179 fdout_wr(fdc, fdc->fdout);
1180 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1181
1182 /* XXX after a reset, silently believe the FDC will accept commands */
1183 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1184 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1185 0);
1186 if (fdc->flags & FDC_HAS_FIFO)
1187 (void) enable_fifo(fdc);
1188}
1189
1190/****************************************************************************/
1191/* fdc in/out */
1192/****************************************************************************/
1193/*
1194 * FDC IO functions, take care of the main status register, timeout
1195 * in case the desired status bits are never set.
1196 *
1197 * These PIO loops initially start out with short delays between
1198 * each iteration in the expectation that the required condition
1199 * is usually met quickly, so it can be handled immediately. After
1200 * about 1 ms, stepping is increased to achieve a better timing
1201 * accuracy in the calls to DELAY().
1202 */
1203static int
1204fd_in(struct fdc_data *fdc, int *ptr)
1205{
1206 int i, j, step;
1207
1208 for (j = 0, step = 1;
1209 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1210 j < FDSTS_TIMEOUT;
1211 j += step) {
1212 if (i == NE7_RQM)
1213 return (fdc_err(fdc, "ready for output in input\n"));
1214 if (j == 1000)
1215 step = 1000;
1216 DELAY(step);
1217 }
1218 if (j >= FDSTS_TIMEOUT)
1219 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1220#ifdef FDC_DEBUG
1221 i = fddata_rd(fdc);
1222 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1223 *ptr = i;
1224 return (0);
1225#else /* !FDC_DEBUG */
1226 i = fddata_rd(fdc);
1227 if (ptr)
1228 *ptr = i;
1229 return (0);
1230#endif /* FDC_DEBUG */
1231}
1232
1233static int
1234out_fdc(struct fdc_data *fdc, int x)
1235{
1236 int i, j, step;
1237
1238 for (j = 0, step = 1;
1239 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1240 j < FDSTS_TIMEOUT;
1241 j += step) {
1242 if (i == (NE7_DIO|NE7_RQM))
1243 return (fdc_err(fdc, "ready for input in output\n"));
1244 if (j == 1000)
1245 step = 1000;
1246 DELAY(step);
1247 }
1248 if (j >= FDSTS_TIMEOUT)
1249 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1250
1251 /* Send the command and return */
1252 fddata_wr(fdc, x);
1253 TRACE1("[0x%x->FDDATA]", x);
1254 return (0);
1255}
1256
1257/****************************************************************************/
1258/* fdopen/fdclose */
1259/****************************************************************************/
1260int
fef8985e 1261Fdopen(struct dev_open_args *ap)
984263bc 1262{
fef8985e 1263 dev_t dev = ap->a_head.a_dev;
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1264 fdu_t fdu = FDUNIT(minor(dev));
1265 int type = FDTYPE(minor(dev));
1266 fd_p fd;
1267 fdc_p fdc;
1268
1269 /* check bounds */
1270 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1271 return (ENXIO);
1272 fdc = fd->fdc;
1273 if ((fdc == NULL) || (fd->type == NO_TYPE))
1274 return (ENXIO);
1275 if (type > NUMDENS)
1276 return (ENXIO);
1277 if (type == 0)
1278 type = fd->type;
1279 else {
1280 /*
1281 * For each type of basic drive, make sure we are trying
1282 * to open a type it can do,
1283 */
1284 if (type != fd->type) {
1285 switch (fd->type) {
1286 case FD_360:
1287 return (ENXIO);
1288 case FD_720:
1289 if ( type != FD_820
1290 && type != FD_800
1291 && type != FD_640
1292 )
1293 return (ENXIO);
1294 break;
1295 case FD_1200:
1296 switch (type) {
1297 case FD_1480:
1298 type = FD_1480in5_25;
1299 break;
1300 case FD_1440:
1301 type = FD_1440in5_25;
1302 break;
1303 case FD_1232:
1304 break;
1305 case FD_820:
1306 type = FD_820in5_25;
1307 break;
1308 case FD_800:
1309 type = FD_800in5_25;
1310 break;
1311 case FD_720:
1312 type = FD_720in5_25;
1313 break;
1314 case FD_640:
1315 type = FD_640in5_25;
1316 break;
1317 case FD_360:
1318 type = FD_360in5_25;
1319 break;
1320 default:
1321 return(ENXIO);
1322 }
1323 break;
1324 case FD_1440:
1325 if ( type != FD_1720
1326 && type != FD_1480
1327 && type != FD_1200
1328 && type != FD_820
1329 && type != FD_800
1330 && type != FD_720
1331 && type != FD_640
1332 )
1333 return(ENXIO);
1334 break;
1335 }
1336 }
1337 }
1338 fd->ft = fd_types + type - 1;
1339 fd->flags |= FD_OPEN;
1340 /*
1341 * Clearing the DMA overrun counter at open time is a bit messy.
1342 * Since we're only managing one counter per controller, opening
1343 * the second drive could mess it up. Anyway, if the DMA overrun
1344 * condition is really persistent, it will eventually time out
1345 * still. OTOH, clearing it here will ensure we'll at least start
1346 * trying again after a previous (maybe even long ago) failure.
1347 * Also, this is merely a stop-gap measure only that should not
1348 * happen during normal operation, so we can tolerate it to be a
1349 * bit sloppy about this.
1350 */
1351 fdc->dma_overruns = 0;
1352
1353 return 0;
1354}
1355
1356int
fef8985e 1357fdclose(struct dev_close_args *ap)
984263bc 1358{
fef8985e 1359 dev_t dev = ap->a_head.a_dev;
984263bc
MD
1360 fdu_t fdu = FDUNIT(minor(dev));
1361 struct fd_data *fd;
1362
1363 fd = devclass_get_softc(fd_devclass, fdu);
1364 fd->flags &= ~FD_OPEN;
1365 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1366
1367 return (0);
1368}
1369
1370/****************************************************************************/
1371/* fdstrategy */
1372/****************************************************************************/
fef8985e
MD
1373int
1374fdstrategy(struct dev_strategy_args *ap)
984263bc 1375{
fef8985e
MD
1376 dev_t dev = ap->a_head.a_dev;
1377 struct bio *bio = ap->a_bio;
81b5c339 1378 struct buf *bp = bio->bio_buf;
984263bc 1379 unsigned nblocks, blknum, cando;
984263bc
MD
1380 fdu_t fdu;
1381 fdc_p fdc;
1382 fd_p fd;
1383 size_t fdblk;
1384
81b5c339 1385 fdu = FDUNIT(minor(dev));
984263bc
MD
1386 fd = devclass_get_softc(fd_devclass, fdu);
1387 if (fd == 0)
1388 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
81b5c339 1389 (u_long)major(dev), (u_long)minor(dev));
984263bc
MD
1390 fdc = fd->fdc;
1391 if (fd->type == NO_TYPE) {
1392 bp->b_error = ENXIO;
1393 bp->b_flags |= B_ERROR;
1394 goto bad;
1395 };
1396
1397 fdblk = 128 << (fd->ft->secsize);
10f3fee5 1398 if (bp->b_cmd != BUF_CMD_FORMAT) {
54078292 1399 if (bio->bio_offset < 0) {
984263bc 1400 printf(
54078292
MD
1401 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n",
1402 fdu, bio->bio_offset, bp->b_bcount);
984263bc
MD
1403 bp->b_error = EINVAL;
1404 bp->b_flags |= B_ERROR;
1405 goto bad;
1406 }
1407 if ((bp->b_bcount % fdblk) != 0) {
1408 bp->b_error = EINVAL;
1409 bp->b_flags |= B_ERROR;
1410 goto bad;
1411 }
1412 }
1413
1414 /*
1415 * Set up block calculations.
1416 */
54078292 1417 if (bio->bio_offset > 20000000LL * fdblk) {
984263bc
MD
1418 /*
1419 * Reject unreasonably high block number, prevent the
1420 * multiplication below from overflowing.
1421 */
1422 bp->b_error = EINVAL;
1423 bp->b_flags |= B_ERROR;
1424 goto bad;
1425 }
54078292 1426 blknum = (unsigned)(bio->bio_offset / fdblk);
984263bc
MD
1427 nblocks = fd->ft->size;
1428 bp->b_resid = 0;
1429 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1430 if (blknum <= nblocks) {
1431 cando = (nblocks - blknum) * fdblk;
1432 bp->b_resid = bp->b_bcount - cando;
1433 if (cando == 0)
1434 goto bad; /* not actually bad but EOF */
1435 } else {
1436 bp->b_error = EINVAL;
1437 bp->b_flags |= B_ERROR;
1438 goto bad;
1439 }
1440 }
fbe276c7 1441 crit_enter();
81b5c339
MD
1442 bio->bio_driver_info = dev;
1443 bioqdisksort(&fdc->bio_queue, bio);
e8b273ff 1444 callout_stop(&fd->toffhandle);
984263bc
MD
1445
1446 /* Tell devstat we are starting on the transaction */
1447 devstat_start_transaction(&fd->device_stats);
1448 device_busy(fd->dev);
1449
1450 fdstart(fdc);
fbe276c7 1451 crit_exit();
fef8985e 1452 return(0);
984263bc
MD
1453
1454bad:
81b5c339 1455 biodone(bio);
fef8985e 1456 return(0);
984263bc
MD
1457}
1458
1459/***************************************************************\
1460* fdstart *
1461* We have just queued something.. if the controller is not busy *
1462* then simulate the case where it has just finished a command *
1463* So that it (the interrupt routine) looks on the queue for more*
1464* work to do and picks up what we just added. *
1465* If the controller is already busy, we need do nothing, as it *
1466* will pick up our work when the present work completes *
1467\***************************************************************/
1468static void
1469fdstart(struct fdc_data *fdc)
1470{
fbe276c7 1471 crit_enter();
984263bc
MD
1472 if(fdc->state == DEVIDLE)
1473 {
1474 fdc_intr(fdc);
1475 }
fbe276c7 1476 crit_exit();
984263bc
MD
1477}
1478
1479static void
1480fd_iotimeout(void *xfdc)
1481{
1482 fdc_p fdc;
984263bc
MD
1483
1484 fdc = xfdc;
1485 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1486
1487 /*
1488 * Due to IBM's brain-dead design, the FDC has a faked ready
1489 * signal, hardwired to ready == true. Thus, any command
1490 * issued if there's no diskette in the drive will _never_
1491 * complete, and must be aborted by resetting the FDC.
1492 * Many thanks, Big Blue!
1493 * The FDC must not be reset directly, since that would
1494 * interfere with the state machine. Instead, pretend that
1495 * the command completed but was invalid. The state machine
1496 * will reset the FDC and retry once.
1497 */
fbe276c7 1498 crit_enter();
984263bc
MD
1499 fdc->status[0] = NE7_ST0_IC_IV;
1500 fdc->flags &= ~FDC_STAT_VALID;
1501 fdc->state = IOTIMEDOUT;
1502 fdc_intr(fdc);
fbe276c7 1503 crit_exit();
984263bc
MD
1504}
1505
fbe276c7 1506/* just ensure it is running in a critical section */
984263bc
MD
1507static void
1508fd_pseudointr(void *xfdc)
1509{
fbe276c7 1510 crit_enter();
984263bc 1511 fdc_intr(xfdc);
fbe276c7 1512 crit_exit();
984263bc
MD
1513}
1514
1515/***********************************************************************\
1516* fdintr *
1517* keep calling the state machine until it returns a 0 *
1518* ALWAYS called at SPLBIO *
1519\***********************************************************************/
1520static void
1521fdc_intr(void *xfdc)
1522{
1523 fdc_p fdc = xfdc;
1524 while(fdstate(fdc))
1525 ;
1526}
1527
1528/*
1529 * magic pseudo-DMA initialization for YE FDC. Sets count and
1530 * direction
1531 */
1532#define SET_BCDR(fdc,wr,cnt,port) \
1533 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1534 ((cnt)-1) & 0xff); \
1535 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1536 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1537
1538/*
1539 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1540 */
10f3fee5 1541static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
984263bc
MD
1542{
1543 u_char *cptr = (u_char *)addr;
1544
10f3fee5 1545 if (cmd == BUF_CMD_READ) {
984263bc
MD
1546 if (fdc->state != PIOREAD) {
1547 fdc->state = PIOREAD;
1548 return(0);
1549 };
1550 SET_BCDR(fdc, 0, count, 0);
1551 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1552 FDC_YE_DATAPORT, cptr, count);
1553 } else {
1554 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1555 FDC_YE_DATAPORT, cptr, count);
1556 SET_BCDR(fdc, 0, count, 0);
1557 };
1558 return(1);
1559}
1560
1561/***********************************************************************\
1562* The controller state machine. *
1563* if it returns a non zero value, it should be called again immediatly *
1564\***********************************************************************/
1565static int
1566fdstate(fdc_p fdc)
1567{
1568 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1569 unsigned blknum = 0, b_cylinder = 0;
1570 fdu_t fdu = fdc->fdu;
1571 fd_p fd;
81b5c339 1572 struct bio *bio;
3a1b0fdc 1573 struct buf *bp;
984263bc
MD
1574 struct fd_formb *finfo = NULL;
1575 size_t fdblk;
81b5c339
MD
1576 dev_t dev;
1577
1578 bio = fdc->bio;
1579 if (bio == NULL) {
1580 bio = bioq_first(&fdc->bio_queue);
1581 if (bio != NULL) {
1582 bioq_remove(&fdc->bio_queue, bio);
1583 fdc->bio = bio;
984263bc
MD
1584 }
1585 }
81b5c339 1586 if (bio == NULL) {
984263bc
MD
1587 /***********************************************\
1588 * nothing left for this controller to do *
1589 * Force into the IDLE state, *
1590 \***********************************************/
1591 fdc->state = DEVIDLE;
1592 if (fdc->fd) {
1593 device_printf(fdc->fdc_dev,
1594 "unexpected valid fd pointer\n");
1595 fdc->fd = (fd_p) 0;
1596 fdc->fdu = -1;
1597 }
1598 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1599 return (0);
1600 }
81b5c339
MD
1601 bp = bio->bio_buf;
1602 dev = bio->bio_driver_info;
1603
1604 fdu = FDUNIT(minor(dev));
984263bc
MD
1605 fd = devclass_get_softc(fd_devclass, fdu);
1606 fdblk = 128 << fd->ft->secsize;
1607 if (fdc->fd && (fd != fdc->fd))
1608 device_printf(fd->dev, "confused fd pointers\n");
10f3fee5
MD
1609 read = (bp->b_cmd == BUF_CMD_READ);
1610 format = (bp->b_cmd == BUF_CMD_FORMAT);
984263bc
MD
1611 if (format) {
1612 finfo = (struct fd_formb *)bp->b_data;
1613 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1614 - (char *)finfo;
1615 }
1616 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
54078292
MD
1617 blknum = (unsigned)(bio->bio_offset / fdblk) +
1618 fd->skip /fdblk;
984263bc
MD
1619 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1620 }
1621 TRACE1("fd%d", fdu);
1622 TRACE1("[%s]", fdstates[fdc->state]);
1623 TRACE1("(0x%x)", fd->flags);
e8b273ff 1624 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
984263bc
MD
1625 switch (fdc->state)
1626 {
1627 case DEVIDLE:
1628 case FINDWORK: /* we have found new work */
1629 fdc->retry = 0;
1630 fd->skip = 0;
1631 fdc->fd = fd;
1632 fdc->fdu = fdu;
1633 fdc->fdctl_wr(fdc, fd->ft->trans);
1634 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1635 /*******************************************************\
1636 * If the next drive has a motor startup pending, then *
1637 * it will start up in its own good time *
1638 \*******************************************************/
1639 if(fd->flags & FD_MOTOR_WAIT) {
1640 fdc->state = MOTORWAIT;
1641 return (0); /* come back later */
1642 }
1643 /*******************************************************\
1644 * Maybe if it's not starting, it SHOULD be starting *
1645 \*******************************************************/
1646 if (!(fd->flags & FD_MOTOR))
1647 {
1648 fdc->state = MOTORWAIT;
1649 fd_turnon(fd);
1650 return (0);
1651 }
1652 else /* at least make sure we are selected */
1653 {
1654 set_motor(fdc, fd->fdsu, TURNON);
1655 }
1656 if (fdc->flags & FDC_NEEDS_RESET) {
1657 fdc->state = RESETCTLR;
1658 fdc->flags &= ~FDC_NEEDS_RESET;
1659 } else
1660 fdc->state = DOSEEK;
1661 break;
1662 case DOSEEK:
1663 if (b_cylinder == (unsigned)fd->track)
1664 {
1665 fdc->state = SEEKCOMPLETE;
1666 break;
1667 }
1668 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1669 fd->fdsu, b_cylinder * fd->ft->steptrac,
1670 0))
1671 {
1672 /*
1673 * seek command not accepted, looks like
1674 * the FDC went off to the Saints...
1675 */
1676 fdc->retry = 6; /* try a reset */
1677 return(retrier(fdc));
1678 }
1679 fd->track = FD_NO_TRACK;
1680 fdc->state = SEEKWAIT;
1681 return(0); /* will return later */
1682 case SEEKWAIT:
1683 /* allow heads to settle */
4fc46503
JS
1684 callout_reset(&fdc->pseudointr_ch, hz / 16,
1685 fd_pseudointr, fdc);
984263bc
MD
1686 fdc->state = SEEKCOMPLETE;
1687 return(0); /* will return later */
1688 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1689 /* Make sure seek really happened*/
1690 if(fd->track == FD_NO_TRACK) {
1691 int descyl = b_cylinder * fd->ft->steptrac;
1692 do {
1693 /*
1694 * This might be a "ready changed" interrupt,
1695 * which cannot really happen since the
1696 * RDY pin is hardwired to + 5 volts. This
1697 * generally indicates a "bouncing" intr
1698 * line, so do one of the following:
1699 *
1700 * When running on an enhanced FDC that is
1701 * known to not go stuck after responding
1702 * with INVALID, fetch all interrupt states
1703 * until seeing either an INVALID or a
1704 * real interrupt condition.
1705 *
1706 * When running on a dumb old NE765, give
1707 * up immediately. The controller will
1708 * provide up to four dummy RC interrupt
1709 * conditions right after reset (for the
1710 * corresponding four drives), so this is
1711 * our only chance to get notice that it
1712 * was not the FDC that caused the interrupt.
1713 */
1714 if (fd_sense_int(fdc, &st0, &cyl)
1715 == FD_NOT_VALID)
1716 return 0;
1717 if(fdc->fdct == FDC_NE765
1718 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1719 return 0; /* hope for a real intr */
1720 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1721
1722 if (0 == descyl) {
1723 int failed = 0;
1724 /*
1725 * seek to cyl 0 requested; make sure we are
1726 * really there
1727 */
1728 if (fd_sense_drive_status(fdc, &st3))
1729 failed = 1;
1730 if ((st3 & NE7_ST3_T0) == 0) {
1731 printf(
1732 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1733 fdu, st3, NE7_ST3BITS);
1734 failed = 1;
1735 }
1736
1737 if (failed) {
1738 if(fdc->retry < 3)
1739 fdc->retry = 3;
1740 return (retrier(fdc));
1741 }
1742 }
1743
1744 if (cyl != descyl) {
1745 printf(
1746 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1747 fdu, descyl, cyl, st0);
1748 if (fdc->retry < 3)
1749 fdc->retry = 3;
1750 return (retrier(fdc));
1751 }
1752 }
1753
1754 fd->track = b_cylinder;
10f3fee5
MD
1755 if (!(fdc->flags & FDC_NODMA)) {
1756 isa_dmastart(isa_dmabp(bp),
1757 bp->b_data+fd->skip,
984263bc 1758 format ? bp->b_bcount : fdblk, fdc->dmachan);
10f3fee5 1759 }
984263bc
MD
1760 sectrac = fd->ft->sectrac;
1761 sec = blknum % (sectrac * fd->ft->heads);
1762 head = sec / sectrac;
1763 sec = sec % sectrac + 1;
1764 fd->hddrv = ((head&1)<<2)+fdu;
1765
1766 if(format || !read)
1767 {
1768 /* make sure the drive is writable */
1769 if(fd_sense_drive_status(fdc, &st3) != 0)
1770 {
1771 /* stuck controller? */
1772 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1773 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1774 bp->b_data + fd->skip,
1775 format ? bp->b_bcount : fdblk,
1776 fdc->dmachan);
1777 fdc->retry = 6; /* reset the beast */
1778 return (retrier(fdc));
1779 }
1780 if(st3 & NE7_ST3_WP)
1781 {
1782 /*
1783 * XXX YES! this is ugly.
1784 * in order to force the current operation
1785 * to fail, we will have to fake an FDC
1786 * error - all error handling is done
1787 * by the retrier()
1788 */
1789 fdc->status[0] = NE7_ST0_IC_AT;
1790 fdc->status[1] = NE7_ST1_NW;
1791 fdc->status[2] = 0;
1792 fdc->status[3] = fd->track;
1793 fdc->status[4] = head;
1794 fdc->status[5] = sec;
1795 fdc->retry = 8; /* break out immediately */
1796 fdc->state = IOTIMEDOUT; /* not really... */
1797 return (1);
1798 }
1799 }
1800
1801 if (format) {
1802 if (fdc->flags & FDC_NODMA) {
1803 /*
1804 * This seems to be necessary for
1805 * whatever obscure reason; if we omit
1806 * it, we end up filling the sector ID
1807 * fields of the newly formatted track
1808 * entirely with garbage, causing
1809 * `wrong cylinder' errors all over
1810 * the place when trying to read them
1811 * back.
1812 *
1813 * Umpf.
1814 */
1815 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1816
10f3fee5 1817 (void)fdcpio(fdc,bp->b_cmd,
984263bc
MD
1818 bp->b_data+fd->skip,
1819 bp->b_bcount);
1820
1821 }
1822 /* formatting */
1823 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1824 finfo->fd_formb_secshift,
1825 finfo->fd_formb_nsecs,
1826 finfo->fd_formb_gaplen,
1827 finfo->fd_formb_fillbyte, 0)) {
1828 /* controller fell over */
1829 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1830 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1831 bp->b_data + fd->skip,
1832 format ? bp->b_bcount : fdblk,
1833 fdc->dmachan);
1834 fdc->retry = 6;
1835 return (retrier(fdc));
1836 }
1837 } else {
1838 if (fdc->flags & FDC_NODMA) {
1839 /*
1840 * this seems to be necessary even when
1841 * reading data
1842 */
1843 SET_BCDR(fdc, 1, fdblk, 0);
1844
1845 /*
1846 * perform the write pseudo-DMA before
1847 * the WRITE command is sent
1848 */
1849 if (!read)
10f3fee5 1850 (void)fdcpio(fdc,bp->b_cmd,
984263bc
MD
1851 bp->b_data+fd->skip,
1852 fdblk);
1853 }
1854 if (fd_cmd(fdc, 9,
1855 (read ? NE7CMD_READ : NE7CMD_WRITE),
1856 head << 2 | fdu, /* head & unit */
1857 fd->track, /* track */
1858 head,
1859 sec, /* sector + 1 */
1860 fd->ft->secsize, /* sector size */
1861 sectrac, /* sectors/track */
1862 fd->ft->gap, /* gap size */
1863 fd->ft->datalen, /* data length */
1864 0)) {
1865 /* the beast is sleeping again */
1866 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1867 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1868 bp->b_data + fd->skip,
1869 format ? bp->b_bcount : fdblk,
1870 fdc->dmachan);
1871 fdc->retry = 6;
1872 return (retrier(fdc));
1873 }
1874 }
1875 if (fdc->flags & FDC_NODMA)
1876 /*
1877 * if this is a read, then simply await interrupt
1878 * before performing PIO
1879 */
10f3fee5 1880 if (read && !fdcpio(fdc,bp->b_cmd,
984263bc 1881 bp->b_data+fd->skip,fdblk)) {
e8b273ff
MD
1882 callout_reset(&fd->tohandle, hz,
1883 fd_iotimeout, fdc);
984263bc
MD
1884 return(0); /* will return later */
1885 };
1886
1887 /*
1888 * write (or format) operation will fall through and
1889 * await completion interrupt
1890 */
1891 fdc->state = IOCOMPLETE;
e8b273ff 1892 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
984263bc
MD
1893 return (0); /* will return later */
1894 case PIOREAD:
1895 /*
1896 * actually perform the PIO read. The IOCOMPLETE case
1897 * removes the timeout for us.
1898 */
10f3fee5 1899 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
984263bc
MD
1900 fdc->state = IOCOMPLETE;
1901 /* FALLTHROUGH */
1902 case IOCOMPLETE: /* IO DONE, post-analyze */
e8b273ff 1903 callout_stop(&fd->tohandle);
984263bc
MD
1904
1905 if (fd_read_status(fdc, fd->fdsu)) {
10f3fee5
MD
1906 if (!(fdc->flags & FDC_NODMA)) {
1907 isa_dmadone(isa_dmabp(bp),
1908 bp->b_data + fd->skip,
984263bc
MD
1909 format ? bp->b_bcount : fdblk,
1910 fdc->dmachan);
10f3fee5 1911 }
984263bc
MD
1912 if (fdc->retry < 6)
1913 fdc->retry = 6; /* force a reset */
1914 return (retrier(fdc));
1915 }
1916
1917 fdc->state = IOTIMEDOUT;
1918
1919 /* FALLTHROUGH */
1920
1921 case IOTIMEDOUT:
10f3fee5
MD
1922 if (!(fdc->flags & FDC_NODMA)) {
1923 isa_dmadone(isa_dmabp(bp),
1924 bp->b_data + fd->skip,
984263bc 1925 format ? bp->b_bcount : fdblk, fdc->dmachan);
10f3fee5 1926 }
984263bc
MD
1927 if (fdc->status[0] & NE7_ST0_IC) {
1928 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1929 && fdc->status[1] & NE7_ST1_OR) {
1930 /*
1931 * DMA overrun. Someone hogged the bus and
1932 * didn't release it in time for the next
1933 * FDC transfer.
1934 *
1935 * We normally restart this without bumping
1936 * the retry counter. However, in case
1937 * something is seriously messed up (like
1938 * broken hardware), we rather limit the
1939 * number of retries so the IO operation
1940 * doesn't block indefinately.
1941 */
1942 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
1943 fdc->state = SEEKCOMPLETE;
1944 return (1);
1945 } /* else fall through */
1946 }
1947 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
1948 && fdc->retry < 6)
1949 fdc->retry = 6; /* force a reset */
1950 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1951 && fdc->status[2] & NE7_ST2_WC
1952 && fdc->retry < 3)
1953 fdc->retry = 3; /* force recalibrate */
1954 return (retrier(fdc));
1955 }
1956 /* All OK */
1957 /* Operation successful, retry DMA overruns again next time. */
1958 fdc->dma_overruns = 0;
1959 fd->skip += fdblk;
1960 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
1961 /* set up next transfer */
1962 fdc->state = DOSEEK;
1963 } else {
1964 /* ALL DONE */
1965 fd->skip = 0;
81b5c339 1966 fdc->bio = NULL;
984263bc
MD
1967 device_unbusy(fd->dev);
1968 devstat_end_transaction_buf(&fd->device_stats, bp);
81b5c339 1969 biodone(bio);
984263bc
MD
1970 fdc->fd = (fd_p) 0;
1971 fdc->fdu = -1;
1972 fdc->state = FINDWORK;
1973 }
1974 return (1);
1975 case RESETCTLR:
1976 fdc_reset(fdc);
1977 fdc->retry++;
1978 fdc->state = RESETCOMPLETE;
1979 return (0);
1980 case RESETCOMPLETE:
1981 /*
1982 * Discard all the results from the reset so that they
1983 * can't cause an unexpected interrupt later.
1984 */
1985 for (i = 0; i < 4; i++)
1986 (void)fd_sense_int(fdc, &st0, &cyl);
1987 fdc->state = STARTRECAL;
1988 /* Fall through. */
1989 case STARTRECAL:
1990 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
1991 /* arrgl */
1992 fdc->retry = 6;
1993 return (retrier(fdc));
1994 }
1995 fdc->state = RECALWAIT;
1996 return (0); /* will return later */
1997 case RECALWAIT:
1998 /* allow heads to settle */
4fc46503 1999 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
984263bc
MD
2000 fdc->state = RECALCOMPLETE;
2001 return (0); /* will return later */
2002 case RECALCOMPLETE:
2003 do {
2004 /*
2005 * See SEEKCOMPLETE for a comment on this:
2006 */
2007 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2008 return 0;
2009 if(fdc->fdct == FDC_NE765
2010 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2011 return 0; /* hope for a real intr */
2012 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2013 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2014 {
2015 if(fdc->retry > 3)
2016 /*
2017 * a recalibrate from beyond cylinder 77
2018 * will "fail" due to the FDC limitations;
2019 * since people used to complain much about
2020 * the failure message, try not logging
2021 * this one if it seems to be the first
2022 * time in a line
2023 */
2024 printf("fd%d: recal failed ST0 %b cyl %d\n",
2025 fdu, st0, NE7_ST0BITS, cyl);
2026 if(fdc->retry < 3) fdc->retry = 3;
2027 return (retrier(fdc));
2028 }
2029 fd->track = 0;
2030 /* Seek (probably) necessary */
2031 fdc->state = DOSEEK;
2032 return (1); /* will return immediatly */
2033 case MOTORWAIT:
2034 if(fd->flags & FD_MOTOR_WAIT)
2035 {
2036 return (0); /* time's not up yet */
2037 }
2038 if (fdc->flags & FDC_NEEDS_RESET) {
2039 fdc->state = RESETCTLR;
2040 fdc->flags &= ~FDC_NEEDS_RESET;
2041 } else {
2042 /*
2043 * If all motors were off, then the controller was
2044 * reset, so it has lost track of the current
2045 * cylinder. Recalibrate to handle this case.
2046 * But first, discard the results of the reset.
2047 */
2048 fdc->state = RESETCOMPLETE;
2049 }
2050 return (1); /* will return immediatly */
2051 default:
2052 device_printf(fdc->fdc_dev, "unexpected FD int->");
2053 if (fd_read_status(fdc, fd->fdsu) == 0)
2054 printf("FDC status :%x %x %x %x %x %x %x ",
2055 fdc->status[0],
2056 fdc->status[1],
2057 fdc->status[2],
2058 fdc->status[3],
2059 fdc->status[4],
2060 fdc->status[5],
2061 fdc->status[6] );
2062 else
2063 printf("No status available ");
2064 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2065 {
2066 printf("[controller is dead now]\n");
2067 return (0);
2068 }
2069 printf("ST0 = %x, PCN = %x\n", st0, cyl);
2070 return (0);
2071 }
2072 /*XXX confusing: some branches return immediately, others end up here*/
2073 return (1); /* Come back immediatly to new state */
2074}
2075
2076static int
2077retrier(struct fdc_data *fdc)
2078{
81b5c339 2079 struct bio *bio;
3a1b0fdc 2080 struct buf *bp;
984263bc 2081 struct fd_data *fd;
81b5c339 2082 dev_t dev;
984263bc
MD
2083 int fdu;
2084
81b5c339
MD
2085 bio = fdc->bio;
2086 bp = bio->bio_buf;
2087 dev = bio->bio_driver_info;
984263bc
MD
2088
2089 /* XXX shouldn't this be cached somewhere? */
81b5c339 2090 fdu = FDUNIT(minor(dev));
984263bc
MD
2091 fd = devclass_get_softc(fd_devclass, fdu);
2092 if (fd->options & FDOPT_NORETRY)
2093 goto fail;
2094
2095 switch (fdc->retry) {
2096 case 0: case 1: case 2:
2097 fdc->state = SEEKCOMPLETE;
2098 break;
2099 case 3: case 4: case 5:
2100 fdc->state = STARTRECAL;
2101 break;
2102 case 6:
2103 fdc->state = RESETCTLR;
2104 break;
2105 case 7:
2106 break;
2107 default:
2108 fail:
2109 {
2110 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
984263bc 2111
e4c9c0c8 2112 if (printerror) {
ee3ad2c9
MD
2113 /*
2114 * note: use the correct device for more
2115 * verbose error reporting.
2116 */
2117 dev_t subdev;
2118
81b5c339
MD
2119 subdev = make_sub_dev(dev,
2120 (FDUNIT(minor(dev))<<3)|RAW_PART);
2121 diskerr(bio, subdev,
ee3ad2c9 2122 "hard error", LOG_PRINTF,
54078292 2123 fdc->fd->skip, NULL);
e4c9c0c8 2124 }
984263bc
MD
2125 if (printerror) {
2126 if (fdc->flags & FDC_STAT_VALID)
2127 printf(
2128 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2129 fdc->status[0], NE7_ST0BITS,
2130 fdc->status[1], NE7_ST1BITS,
2131 fdc->status[2], NE7_ST2BITS,
2132 fdc->status[3], fdc->status[4],
2133 fdc->status[5]);
2134 else
2135 printf(" (No status)\n");
2136 }
2137 }
2138 bp->b_flags |= B_ERROR;
2139 bp->b_error = EIO;
2140 bp->b_resid += bp->b_bcount - fdc->fd->skip;
81b5c339 2141 fdc->bio = NULL;
984263bc
MD
2142 fdc->fd->skip = 0;
2143 device_unbusy(fd->dev);
2144 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
81b5c339 2145 biodone(bio);
984263bc
MD
2146 fdc->state = FINDWORK;
2147 fdc->flags |= FDC_NEEDS_RESET;
2148 fdc->fd = (fd_p) 0;
2149 fdc->fdu = -1;
2150 return (1);
2151 }
2152 fdc->retry++;
2153 return (1);
2154}
2155
014958fd
MD
2156static void
2157fdformat_wakeup(struct bio *bio)
2158{
2159 bio->bio_buf->b_cmd = BUF_CMD_DONE;
2160 wakeup(bio);
2161}
2162
984263bc 2163static int
fef8985e 2164fdformat(dev_t dev, struct fd_formb *finfo, struct ucred *cred)
984263bc
MD
2165{
2166 fdu_t fdu;
2167 fd_p fd;
984263bc 2168 struct buf *bp;
fbe276c7 2169 int rv = 0;
984263bc
MD
2170 size_t fdblk;
2171
2172 fdu = FDUNIT(minor(dev));
2173 fd = devclass_get_softc(fd_devclass, fdu);
2174 fdblk = 128 << fd->ft->secsize;
2175
2176 /* set up a buffer header for fdstrategy() */
014958fd 2177 bp = getpbuf(NULL);
10f3fee5 2178 bp->b_cmd = BUF_CMD_FORMAT;
984263bc
MD
2179
2180 /*
2181 * calculate a fake blkno, so fdstrategy() would initiate a
2182 * seek to the requested cylinder
2183 */
54078292
MD
2184 bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
2185 (fd->ft->sectrac * fd->ft->heads)
2186 + finfo->head * fd->ft->sectrac) * fdblk;
81b5c339 2187 bp->b_bio1.bio_driver_info = dev;
014958fd 2188 bp->b_bio1.bio_done = fdformat_wakeup;
984263bc
MD
2189
2190 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2191 bp->b_data = (caddr_t)finfo;
2192
2193 /* now do the format */
81b5c339 2194 dev_dstrategy(dev, &bp->b_bio1);
984263bc
MD
2195
2196 /* ...and wait for it to complete */
fbe276c7 2197 crit_enter();
10f3fee5 2198 while (bp->b_cmd != BUF_CMD_DONE) {
014958fd 2199 rv = tsleep(&bp->b_bio1, 0, "fdform", 20 * hz);
984263bc
MD
2200 if (rv == EWOULDBLOCK)
2201 break;
2202 }
fbe276c7 2203 crit_exit();
984263bc
MD
2204
2205 if (rv == EWOULDBLOCK) {
2206 /* timed out */
2207 rv = EIO;
2208 device_unbusy(fd->dev);
81b5c339 2209 biodone(&bp->b_bio1);
984263bc
MD
2210 }
2211 if (bp->b_flags & B_ERROR)
2212 rv = bp->b_error;
2213 /*
2214 * allow the process to be swapped
2215 */
014958fd 2216 relpbuf(bp, NULL);
984263bc
MD
2217 return rv;
2218}
2219
2220/*
2221 * TODO: don't allocate buffer on stack.
2222 */
2223
2224static int
fef8985e 2225fdioctl(struct dev_ioctl_args *ap)
984263bc 2226{
fef8985e 2227 dev_t dev = ap->a_head.a_dev;
984263bc
MD
2228 fdu_t fdu = FDUNIT(minor(dev));
2229 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2230 size_t fdblk;
2231
2232 struct fd_type *fdt;
2233 struct disklabel *dl;
2234 struct fdc_status *fsp;
2235 char buffer[DEV_BSIZE];
2236 int error = 0;
2237
2238 fdblk = 128 << fd->ft->secsize;
2239
fef8985e 2240 switch (ap->a_cmd) {
984263bc
MD
2241 case DIOCGDINFO:
2242 bzero(buffer, sizeof (buffer));
2243 dl = (struct disklabel *)buffer;
2244 dl->d_secsize = fdblk;
2245 fdt = fd->ft;
2246 dl->d_secpercyl = fdt->size / fdt->tracks;
2247 dl->d_type = DTYPE_FLOPPY;
2248
2249 if (readdisklabel(dev, dl)
2250 == NULL)
2251 error = 0;
2252 else
2253 error = EINVAL;
2254
fef8985e 2255 *(struct disklabel *)ap->a_data = *dl;
984263bc
MD
2256 break;
2257
2258 case DIOCSDINFO:
fef8985e 2259 if ((ap->a_fflag & FWRITE) == 0)
984263bc
MD
2260 error = EBADF;
2261 break;
2262
2263 case DIOCWLABEL:
fef8985e 2264 if ((ap->a_fflag & FWRITE) == 0)
984263bc
MD
2265 error = EBADF;
2266 break;
2267
2268 case DIOCWDINFO:
fef8985e 2269 if ((ap->a_fflag & FWRITE) == 0) {
984263bc
MD
2270 error = EBADF;
2271 break;
2272 }
2273
fef8985e 2274 dl = (struct disklabel *)ap->a_data;
984263bc
MD
2275
2276 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2277 (u_long)0)) != 0)
2278 break;
2279
2280 error = writedisklabel(dev, (struct disklabel *)buffer);
2281 break;
2282 case FD_FORM:
fef8985e 2283 if ((ap->a_fflag & FWRITE) == 0)
984263bc 2284 error = EBADF; /* must be opened for writing */
fef8985e 2285 else if (((struct fd_formb *)ap->a_data)->format_version !=
984263bc
MD
2286 FD_FORMAT_VERSION)
2287 error = EINVAL; /* wrong version of formatting prog */
2288 else
fef8985e 2289 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred);
984263bc
MD
2290 break;
2291
2292 case FD_GTYPE: /* get drive type */
fef8985e 2293 *(struct fd_type *)ap->a_data = *fd->ft;
984263bc
MD
2294 break;
2295
2296 case FD_STYPE: /* set drive type */
2297 /* this is considered harmful; only allow for superuser */
fef8985e 2298 if (suser_cred(ap->a_cred, 0) != 0)
984263bc 2299 return EPERM;
fef8985e 2300 *fd->ft = *(struct fd_type *)ap->a_data;
984263bc
MD
2301 break;
2302
2303 case FD_GOPTS: /* get drive options */
fef8985e 2304 *(int *)ap->a_data = fd->options;
984263bc
MD
2305 break;
2306
2307 case FD_SOPTS: /* set drive options */
fef8985e 2308 fd->options = *(int *)ap->a_data;
984263bc
MD
2309 break;
2310
2311 case FD_GSTAT:
fef8985e 2312 fsp = (struct fdc_status *)ap->a_data;
984263bc
MD
2313 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2314 return EINVAL;
2315 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2316 break;
2317
2318 default:
2319 error = ENOTTY;
2320 break;
2321 }
2322 return (error);
2323}
2324
2325/*
2326 * Hello emacs, these are the
2327 * Local Variables:
2328 * c-indent-level: 8
2329 * c-continued-statement-offset: 8
2330 * c-continued-brace-offset: 0
2331 * c-brace-offset: -8
2332 * c-brace-imaginary-offset: 0
2333 * c-argdecl-indent: 8
2334 * c-label-offset: -8
2335 * c++-hanging-braces: 1
2336 * c++-access-specifier-offset: -8
2337 * c++-empty-arglist-indent: 8
2338 * c++-friend-offset: 0
2339 * End:
2340 */