Throw better sanity checks into vfs_hang_addrlist() for argp->ex_addrlen
[dragonfly.git] / sys / dev / disk / fd / fd.c
CommitLineData
984263bc
MD
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 $
fabb8ceb 54 * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.7 2003/07/21 05:50:42 dillon Exp $
984263bc
MD
55 *
56 */
57
58#include "opt_fdc.h"
59#include "card.h"
60
61#include <sys/param.h>
62#include <sys/systm.h>
fabb8ceb 63#include <sys/bootmaj.h>
984263bc
MD
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>
75
76#include <sys/bus.h>
77#include <machine/bus.h>
78#include <sys/rman.h>
79
3020e3be
MD
80#include <sys/buf2.h>
81
984263bc
MD
82#include <machine/clock.h>
83#include <machine/ioctl_fd.h>
84#include <machine/resource.h>
85#include <machine/stdarg.h>
86
87#include <isa/isavar.h>
88#include <isa/isareg.h>
89#include <isa/fdreg.h>
90#include <isa/fdc.h>
91#include <isa/rtc.h>
92
93/* misuse a flag to identify format operation */
94#define B_FORMAT B_XXX
95
96/* configuration flags */
97#define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
98#define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
99
100/* internally used only, not really from CMOS: */
101#define RTCFDT_144M_PRETENDED 0x1000
102
103/* error returns for fd_cmd() */
104#define FD_FAILED -1
105#define FD_NOT_VALID -2
106#define FDC_ERRMAX 100 /* do not log more */
107/*
108 * Stop retrying after this many DMA overruns. Since each retry takes
109 * one revolution, with 300 rpm., 25 retries take approximately 10
110 * seconds which the read attempt will block in case the DMA overrun
111 * is persistent.
112 */
113#define FDC_DMAOV_MAX 25
114
115/*
116 * Timeout value for the PIO loops to wait until the FDC main status
117 * register matches our expectations (request for master, direction
118 * bit). This is supposed to be a number of microseconds, although
119 * timing might actually not be very accurate.
120 *
121 * Timeouts of 100 msec are believed to be required for some broken
122 * (old) hardware.
123 */
124#define FDSTS_TIMEOUT 100000
125
126#define NUMTYPES 17
127#define NUMDENS (NUMTYPES - 7)
128
129/* These defines (-1) must match index for fd_types */
130#define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
131#define NO_TYPE 0 /* must match NO_TYPE in ft.c */
132#define FD_1720 1
133#define FD_1480 2
134#define FD_1440 3
135#define FD_1200 4
136#define FD_820 5
137#define FD_800 6
138#define FD_720 7
139#define FD_360 8
140#define FD_640 9
141#define FD_1232 10
142
143#define FD_1480in5_25 11
144#define FD_1440in5_25 12
145#define FD_820in5_25 13
146#define FD_800in5_25 14
147#define FD_720in5_25 15
148#define FD_360in5_25 16
149#define FD_640in5_25 17
150
151
152static struct fd_type fd_types[NUMTYPES] =
153{
154{ 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
155{ 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
156{ 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
157{ 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
158{ 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
159{ 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
160{ 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
161{ 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
162{ 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
163{ 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
164
165{ 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
166{ 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
167{ 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
168{ 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
169{ 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
170{ 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
171{ 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
172};
173
174#define DRVS_PER_CTLR 2 /* 2 floppies */
175
176/***********************************************************************\
177* Per controller structure. *
178\***********************************************************************/
179static devclass_t fdc_devclass;
180
181/***********************************************************************\
182* Per drive structure. *
183* N per controller (DRVS_PER_CTLR) *
184\***********************************************************************/
185struct fd_data {
186 struct fdc_data *fdc; /* pointer to controller structure */
187 int fdsu; /* this units number on this controller */
188 int type; /* Drive type (FD_1440...) */
189 struct fd_type *ft; /* pointer to the type descriptor */
190 int flags;
191#define FD_OPEN 0x01 /* it's open */
192#define FD_ACTIVE 0x02 /* it's active */
193#define FD_MOTOR 0x04 /* motor should be on */
194#define FD_MOTOR_WAIT 0x08 /* motor coming up */
195 int skip;
196 int hddrv;
197#define FD_NO_TRACK -2
198 int track; /* where we think the head is */
199 int options; /* user configurable options, see ioctl_fd.h */
200 struct callout_handle toffhandle;
201 struct callout_handle tohandle;
202 struct devstat device_stats;
203 device_t dev;
204 fdu_t fdu;
205};
206
207struct fdc_ivars {
208 int fdunit;
209};
210static devclass_t fd_devclass;
211
212/***********************************************************************\
213* Throughout this file the following conventions will be used: *
214* fd is a pointer to the fd_data struct for the drive in question *
215* fdc is a pointer to the fdc_data struct for the controller *
216* fdu is the floppy drive unit number *
217* fdcu is the floppy controller unit number *
218* fdsu is the floppy drive unit number on that controller. (sub-unit) *
219\***********************************************************************/
220
221/* internal functions */
222static void fdc_intr(void *);
223static void set_motor(struct fdc_data *, int, int);
224# define TURNON 1
225# define TURNOFF 0
226static timeout_t fd_turnoff;
227static timeout_t fd_motor_on;
228static void fd_turnon(struct fd_data *);
229static void fdc_reset(fdc_p);
230static int fd_in(struct fdc_data *, int *);
231static int out_fdc(struct fdc_data *, int);
232static void fdstart(struct fdc_data *);
233static timeout_t fd_iotimeout;
234static timeout_t fd_pseudointr;
235static int fdstate(struct fdc_data *);
236static int retrier(struct fdc_data *);
41c20dac 237static int fdformat(dev_t, struct fd_formb *, struct thread *);
984263bc
MD
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
287static void
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
317#if NCARD > 0
318static void
319fdctl_wr_pcmcia(fdc_p fdc, u_int8_t v)
320{
321 bus_space_write_1(fdc->portt, fdc->porth, FDCTL+fdc->port_off, v);
322}
323#endif
324
325#if 0
326
327static u_int8_t
328fdin_rd(fdc_p fdc)
329{
330 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
331}
332
333#endif
334
335static d_open_t Fdopen; /* NOTE, not fdopen */
336static d_close_t fdclose;
337static d_ioctl_t fdioctl;
338static d_strategy_t fdstrategy;
339
984263bc 340static struct cdevsw fd_cdevsw = {
fabb8ceb
MD
341 /* name */ "fd",
342 /* maj */ FD_CDEV_MAJOR,
343 /* flags */ D_DISK,
344 /* port */ NULL,
345 /* autoq */ 0,
346
984263bc
MD
347 /* open */ Fdopen,
348 /* close */ fdclose,
349 /* read */ physread,
350 /* write */ physwrite,
351 /* ioctl */ fdioctl,
352 /* poll */ nopoll,
353 /* mmap */ nommap,
354 /* strategy */ fdstrategy,
984263bc 355 /* dump */ nodump,
fabb8ceb 356 /* psize */ nopsize
984263bc
MD
357};
358
359static int
360fdc_err(struct fdc_data *fdc, const char *s)
361{
362 fdc->fdc_errs++;
363 if (s) {
364 if (fdc->fdc_errs < FDC_ERRMAX)
365 device_printf(fdc->fdc_dev, "%s", s);
366 else if (fdc->fdc_errs == FDC_ERRMAX)
367 device_printf(fdc->fdc_dev, "too many errors, not "
368 "logging any more\n");
369 }
370
371 return FD_FAILED;
372}
373
374/*
375 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
376 * Unit number,
377 * # of output bytes, output bytes as ints ...,
378 * # of input bytes, input bytes as ints ...
379 */
380static int
381fd_cmd(struct fdc_data *fdc, int n_out, ...)
382{
383 u_char cmd;
384 int n_in;
385 int n;
386 va_list ap;
387
388 va_start(ap, n_out);
389 cmd = (u_char)(va_arg(ap, int));
390 va_end(ap);
391 va_start(ap, n_out);
392 for (n = 0; n < n_out; n++)
393 {
394 if (out_fdc(fdc, va_arg(ap, int)) < 0)
395 {
396 char msg[50];
397 snprintf(msg, sizeof(msg),
398 "cmd %x failed at out byte %d of %d\n",
399 cmd, n + 1, n_out);
400 return fdc_err(fdc, msg);
401 }
402 }
403 n_in = va_arg(ap, int);
404 for (n = 0; n < n_in; n++)
405 {
406 int *ptr = va_arg(ap, int *);
407 if (fd_in(fdc, ptr) < 0)
408 {
409 char msg[50];
410 snprintf(msg, sizeof(msg),
411 "cmd %02x failed at in byte %d of %d\n",
412 cmd, n + 1, n_in);
413 return fdc_err(fdc, msg);
414 }
415 }
416
417 return 0;
418}
419
420static int
421enable_fifo(fdc_p fdc)
422{
423 int i, j;
424
425 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
426
427 /*
428 * XXX:
429 * Cannot use fd_cmd the normal way here, since
430 * this might be an invalid command. Thus we send the
431 * first byte, and check for an early turn of data directon.
432 */
433
434 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
435 return fdc_err(fdc, "Enable FIFO failed\n");
436
437 /* If command is invalid, return */
438 j = FDSTS_TIMEOUT;
439 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
440 != NE7_RQM && j-- > 0) {
441 if (i == (NE7_DIO | NE7_RQM)) {
442 fdc_reset(fdc);
443 return FD_FAILED;
444 }
445 DELAY(1);
446 }
447 if (j<0 ||
448 fd_cmd(fdc, 3,
449 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
450 fdc_reset(fdc);
451 return fdc_err(fdc, "Enable FIFO failed\n");
452 }
453 fdc->flags |= FDC_HAS_FIFO;
454 return 0;
455 }
456 if (fd_cmd(fdc, 4,
457 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
458 return fdc_err(fdc, "Re-enable FIFO failed\n");
459 return 0;
460}
461
462static int
463fd_sense_drive_status(fdc_p fdc, int *st3p)
464{
465 int st3;
466
467 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
468 {
469 return fdc_err(fdc, "Sense Drive Status failed\n");
470 }
471 if (st3p)
472 *st3p = st3;
473
474 return 0;
475}
476
477static int
478fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
479{
480 int cyl, st0, ret;
481
482 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
483 if (ret) {
484 (void)fdc_err(fdc,
485 "sense intr err reading stat reg 0\n");
486 return ret;
487 }
488
489 if (st0p)
490 *st0p = st0;
491
492 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
493 /*
494 * There doesn't seem to have been an interrupt.
495 */
496 return FD_NOT_VALID;
497 }
498
499 if (fd_in(fdc, &cyl) < 0) {
500 return fdc_err(fdc, "can't get cyl num\n");
501 }
502
503 if (cylp)
504 *cylp = cyl;
505
506 return 0;
507}
508
509
510static int
511fd_read_status(fdc_p fdc, int fdsu)
512{
513 int i, ret;
514
515 for (i = 0; i < 7; i++) {
516 /*
517 * XXX types are poorly chosen. Only bytes can by read
518 * from the hardware, but fdc->status[] wants u_ints and
519 * fd_in() gives ints.
520 */
521 int status;
522
523 ret = fd_in(fdc, &status);
524 fdc->status[i] = status;
525 if (ret != 0)
526 break;
527 }
528
529 if (ret == 0)
530 fdc->flags |= FDC_STAT_VALID;
531 else
532 fdc->flags &= ~FDC_STAT_VALID;
533
534 return ret;
535}
536
537/****************************************************************************/
538/* autoconfiguration stuff */
539/****************************************************************************/
540
541static int
542fdc_alloc_resources(struct fdc_data *fdc)
543{
544 device_t dev;
545 int ispnp, ispcmcia;
546
547 dev = fdc->fdc_dev;
548 ispnp = (fdc->flags & FDC_ISPNP) != 0;
549 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
550 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
551 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
552
553 /*
554 * On standard ISA, we don't just use an 8 port range
555 * (e.g. 0x3f0-0x3f7) since that covers an IDE control
556 * register at 0x3f6.
557 *
558 * Isn't PC hardware wonderful.
559 *
560 * The Y-E Data PCMCIA FDC doesn't have this problem, it
561 * uses the register with offset 6 for pseudo-DMA, and the
562 * one with offset 7 as control register.
563 */
564 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
565 &fdc->rid_ioport, 0ul, ~0ul,
566 ispcmcia ? 8 : (ispnp ? 1 : 6),
567 RF_ACTIVE);
568 if (fdc->res_ioport == 0) {
569 device_printf(dev, "cannot reserve I/O port range\n");
570 return ENXIO;
571 }
572 fdc->portt = rman_get_bustag(fdc->res_ioport);
573 fdc->porth = rman_get_bushandle(fdc->res_ioport);
574
575 if (!ispcmcia) {
576 /*
577 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
578 * and some at 0x3f0-0x3f5,0x3f7. We detect the former
579 * by checking the size and adjust the port address
580 * accordingly.
581 */
582 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
583 fdc->port_off = -2;
584
585 /*
586 * Register the control port range as rid 1 if it
587 * isn't there already. Most PnP BIOSen will have
588 * already done this but non-PnP configurations don't.
589 *
590 * And some (!!) report 0x3f2-0x3f5 and completely
591 * leave out the control register! It seems that some
592 * non-antique controller chips have a different
593 * method of programming the transfer speed which
594 * doesn't require the control register, but it's
595 * mighty bogus as the chip still responds to the
596 * address for the control register.
597 */
598 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
599 u_long ctlstart;
600
601 /* Find the control port, usually 0x3f7 */
602 ctlstart = rman_get_start(fdc->res_ioport) +
603 fdc->port_off + 7;
604
605 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
606 }
607
608 /*
609 * Now (finally!) allocate the control port.
610 */
611 fdc->rid_ctl = 1;
612 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
613 &fdc->rid_ctl,
614 0ul, ~0ul, 1, RF_ACTIVE);
615 if (fdc->res_ctl == 0) {
616 device_printf(dev,
617 "cannot reserve control I/O port range\n");
618 return ENXIO;
619 }
620 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
621 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
622 }
623
624 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
625 &fdc->rid_irq, 0ul, ~0ul, 1,
626 RF_ACTIVE);
627 if (fdc->res_irq == 0) {
628 device_printf(dev, "cannot reserve interrupt line\n");
629 return ENXIO;
630 }
631
632 if ((fdc->flags & FDC_NODMA) == 0) {
633 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
634 &fdc->rid_drq, 0ul, ~0ul, 1,
635 RF_ACTIVE);
636 if (fdc->res_drq == 0) {
637 device_printf(dev, "cannot reserve DMA request line\n");
638 return ENXIO;
639 }
640 fdc->dmachan = fdc->res_drq->r_start;
641 }
642
643 return 0;
644}
645
646static void
647fdc_release_resources(struct fdc_data *fdc)
648{
649 device_t dev;
650
651 dev = fdc->fdc_dev;
652 if (fdc->res_irq != 0) {
653 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
654 fdc->res_irq);
655 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
656 fdc->res_irq);
657 }
658 if (fdc->res_ctl != 0) {
659 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
660 fdc->res_ctl);
661 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
662 fdc->res_ctl);
663 }
664 if (fdc->res_ioport != 0) {
665 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
666 fdc->res_ioport);
667 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
668 fdc->res_ioport);
669 }
670 if (fdc->res_drq != 0) {
671 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
672 fdc->res_drq);
673 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
674 fdc->res_drq);
675 }
676}
677
678/****************************************************************************/
679/* autoconfiguration stuff */
680/****************************************************************************/
681
682static struct isa_pnp_id fdc_ids[] = {
683 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
684 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
685 {0}
686};
687
688static int
689fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
690{
691 struct fdc_ivars *ivars = device_get_ivars(child);
692
693 switch (which) {
694 case FDC_IVAR_FDUNIT:
695 *result = ivars->fdunit;
696 break;
697 default:
698 return ENOENT;
699 }
700 return 0;
701}
702
703/*
704 * fdc controller section.
705 */
706static int
707fdc_probe(device_t dev)
708{
709 int error, ic_type;
710 struct fdc_data *fdc;
711
712 fdc = device_get_softc(dev);
713 bzero(fdc, sizeof *fdc);
714 fdc->fdc_dev = dev;
715 fdc->fdctl_wr = fdctl_wr_isa;
716
717 /* Check pnp ids */
718 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
719 if (error == ENXIO)
720 return ENXIO;
721 if (error == 0)
722 fdc->flags |= FDC_ISPNP;
723
724 /* Attempt to allocate our resources for the duration of the probe */
725 error = fdc_alloc_resources(fdc);
726 if (error)
727 goto out;
728
729 /* First - lets reset the floppy controller */
730 fdout_wr(fdc, 0);
731 DELAY(100);
732 fdout_wr(fdc, FDO_FRST);
733
734 /* see if it can handle a command */
735 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
736 NE7_SPEC_2(2, 0), 0)) {
737 error = ENXIO;
738 goto out;
739 }
740
741 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
742 ic_type = (u_char)ic_type;
743 switch (ic_type) {
744 case 0x80:
745 device_set_desc(dev, "NEC 765 or clone");
746 fdc->fdct = FDC_NE765;
747 break;
748 case 0x81:
749 device_set_desc(dev, "Intel 82077 or clone");
750 fdc->fdct = FDC_I82077;
751 break;
752 case 0x90:
753 device_set_desc(dev, "NEC 72065B or clone");
754 fdc->fdct = FDC_NE72065;
755 break;
756 default:
757 device_set_desc(dev, "generic floppy controller");
758 fdc->fdct = FDC_UNKNOWN;
759 break;
760 }
761 }
762
763out:
764 fdc_release_resources(fdc);
765 return (error);
766}
767
768#if NCARD > 0
769
770static int
771fdc_pccard_probe(device_t dev)
772{
773 int error;
774 struct fdc_data *fdc;
775
776 fdc = device_get_softc(dev);
777 bzero(fdc, sizeof *fdc);
778 fdc->fdc_dev = dev;
779 fdc->fdctl_wr = fdctl_wr_pcmcia;
780
781 fdc->flags |= FDC_ISPCMCIA | FDC_NODMA;
782
783 /* Attempt to allocate our resources for the duration of the probe */
784 error = fdc_alloc_resources(fdc);
785 if (error)
786 goto out;
787
788 /* First - lets reset the floppy controller */
789 fdout_wr(fdc, 0);
790 DELAY(100);
791 fdout_wr(fdc, FDO_FRST);
792
793 /* see if it can handle a command */
794 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
795 NE7_SPEC_2(2, 0), 0)) {
796 error = ENXIO;
797 goto out;
798 }
799
800 device_set_desc(dev, "Y-E Data PCMCIA floppy");
801 fdc->fdct = FDC_NE765;
802
803out:
804 fdc_release_resources(fdc);
805 return (error);
806}
807
808static int
809fdc_pccard_detach(device_t dev)
810{
811 struct fdc_data *fdc;
812 int error;
813
814 fdc = device_get_softc(dev);
815
816 /* have our children detached first */
817 if ((error = bus_generic_detach(dev)))
818 return (error);
819
820 if ((fdc->flags & FDC_ATTACHED) == 0) {
821 device_printf(dev, "already unloaded\n");
822 return (0);
823 }
824 fdc->flags &= ~FDC_ATTACHED;
825
826 BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq,
827 fdc->fdc_intr);
828 fdc_release_resources(fdc);
829 device_printf(dev, "unload\n");
830 return (0);
831}
832
833#endif /* NCARD > 0 */
834
835/*
836 * Add a child device to the fdc controller. It will then be probed etc.
837 */
838static void
839fdc_add_child(device_t dev, const char *name, int unit)
840{
841 int disabled;
842 struct fdc_ivars *ivar;
843 device_t child;
844
845 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT);
846 if (ivar == NULL)
847 return;
848 bzero(ivar, sizeof *ivar);
849 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
850 ivar->fdunit = 0;
851 child = device_add_child(dev, name, unit);
852 if (child == NULL)
853 return;
854 device_set_ivars(child, ivar);
855 if (resource_int_value(name, unit, "disabled", &disabled) == 0
856 && disabled != 0)
857 device_disable(child);
858}
859
860static int
861fdc_attach(device_t dev)
862{
863 struct fdc_data *fdc;
864 int i, error;
865
866 fdc = device_get_softc(dev);
867 error = fdc_alloc_resources(fdc);
868 if (error) {
869 device_printf(dev, "cannot re-aquire resources\n");
870 return error;
871 }
872 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
873 INTR_TYPE_BIO, fdc_intr, fdc, &fdc->fdc_intr);
874 if (error) {
875 device_printf(dev, "cannot setup interrupt\n");
876 return error;
877 }
878 fdc->fdcu = device_get_unit(dev);
879 fdc->flags |= FDC_ATTACHED;
880
881 if ((fdc->flags & FDC_NODMA) == 0) {
882 /* Acquire the DMA channel forever, The driver will do the rest */
883 /* XXX should integrate with rman */
884 isa_dma_acquire(fdc->dmachan);
885 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
886 }
887 fdc->state = DEVIDLE;
888
889 /* reset controller, turn motor off, clear fdout mirror reg */
890 fdout_wr(fdc, ((fdc->fdout = 0)));
891 bufq_init(&fdc->head);
892
893 /*
894 * Probe and attach any children. We should probably detect
895 * devices from the BIOS unless overridden.
896 */
897 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
898 i != -1;
899 i = resource_query_string(i, "at", device_get_nameunit(dev)))
900 fdc_add_child(dev, resource_query_name(i),
901 resource_query_unit(i));
902
903 return (bus_generic_attach(dev));
904}
905
906static int
907fdc_print_child(device_t me, device_t child)
908{
909 int retval = 0;
910
911 retval += bus_print_child_header(me, child);
912 retval += printf(" on %s drive %d\n", device_get_nameunit(me),
913 fdc_get_fdunit(child));
914
915 return (retval);
916}
917
918static device_method_t fdc_methods[] = {
919 /* Device interface */
920 DEVMETHOD(device_probe, fdc_probe),
921 DEVMETHOD(device_attach, fdc_attach),
922 DEVMETHOD(device_detach, bus_generic_detach),
923 DEVMETHOD(device_shutdown, bus_generic_shutdown),
924 DEVMETHOD(device_suspend, bus_generic_suspend),
925 DEVMETHOD(device_resume, bus_generic_resume),
926
927 /* Bus interface */
928 DEVMETHOD(bus_print_child, fdc_print_child),
929 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
930 /* Our children never use any other bus interface methods. */
931
932 { 0, 0 }
933};
934
935static driver_t fdc_driver = {
936 "fdc",
937 fdc_methods,
938 sizeof(struct fdc_data)
939};
940
941DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
942
943#if NCARD > 0
944
945static device_method_t fdc_pccard_methods[] = {
946 /* Device interface */
947 DEVMETHOD(device_probe, fdc_pccard_probe),
948 DEVMETHOD(device_attach, fdc_attach),
949 DEVMETHOD(device_detach, fdc_pccard_detach),
950 DEVMETHOD(device_shutdown, bus_generic_shutdown),
951 DEVMETHOD(device_suspend, bus_generic_suspend),
952 DEVMETHOD(device_resume, bus_generic_resume),
953
954 /* Bus interface */
955 DEVMETHOD(bus_print_child, fdc_print_child),
956 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
957 /* Our children never use any other bus interface methods. */
958
959 { 0, 0 }
960};
961
962static driver_t fdc_pccard_driver = {
963 "fdc",
964 fdc_pccard_methods,
965 sizeof(struct fdc_data)
966};
967
968DRIVER_MODULE(fdc, pccard, fdc_pccard_driver, fdc_devclass, 0, 0);
969
970#endif /* NCARD > 0 */
971
972/******************************************************************/
973/*
974 * devices attached to the controller section.
975 */
976static int
977fd_probe(device_t dev)
978{
979 int i;
980 u_int fdt, st0, st3;
981 struct fd_data *fd;
982 struct fdc_data *fdc;
983 fdsu_t fdsu;
984 static int fd_fifo = 0;
985
986 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
987 fd = device_get_softc(dev);
988 fdc = device_get_softc(device_get_parent(dev));
989
990 bzero(fd, sizeof *fd);
991 fd->dev = dev;
992 fd->fdc = fdc;
993 fd->fdsu = fdsu;
994 fd->fdu = device_get_unit(dev);
995
996#ifdef __i386__
997 /* look up what bios thinks we have */
998 switch (fd->fdu) {
999 case 0:
1000 if ((fdc->flags & FDC_ISPCMCIA))
1001 fdt = RTCFDT_144M;
1002 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
1003 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
1004 else
1005 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
1006 break;
1007 case 1:
1008 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
1009 break;
1010 default:
1011 fdt = RTCFDT_NONE;
1012 break;
1013 }
1014#else
1015 fdt = RTCFDT_144M; /* XXX probably */
1016#endif
1017
1018 /* is there a unit? */
1019 if (fdt == RTCFDT_NONE)
1020 return (ENXIO);
1021
1022 /* select it */
1023 set_motor(fdc, fdsu, TURNON);
1024 DELAY(1000000); /* 1 sec */
1025
1026 /* XXX This doesn't work before the first set_motor() */
1027 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
1028 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
1029 && enable_fifo(fdc) == 0) {
1030 device_printf(device_get_parent(dev),
1031 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
1032 }
1033 fd_fifo = 1;
1034
1035 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
1036 && (st3 & NE7_ST3_T0)) {
1037 /* if at track 0, first seek inwards */
1038 /* seek some steps: */
1039 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
1040 DELAY(300000); /* ...wait a moment... */
1041 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
1042 }
1043
1044 /* If we're at track 0 first seek inwards. */
1045 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
1046 /* Seek some steps... */
1047 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
1048 /* ...wait a moment... */
1049 DELAY(300000);
1050 /* make ctrlr happy: */
1051 fd_sense_int(fdc, 0, 0);
1052 }
1053 }
1054
1055 for (i = 0; i < 2; i++) {
1056 /*
1057 * we must recalibrate twice, just in case the
1058 * heads have been beyond cylinder 76, since most
1059 * FDCs still barf when attempting to recalibrate
1060 * more than 77 steps
1061 */
1062 /* go back to 0: */
1063 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
1064 /* a second being enough for full stroke seek*/
1065 DELAY(i == 0 ? 1000000 : 300000);
1066
1067 /* anything responding? */
1068 if (fd_sense_int(fdc, &st0, 0) == 0 &&
1069 (st0 & NE7_ST0_EC) == 0)
1070 break; /* already probed succesfully */
1071 }
1072 }
1073
1074 set_motor(fdc, fdsu, TURNOFF);
1075
1076 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
1077 return (ENXIO);
1078
1079 fd->track = FD_NO_TRACK;
1080 fd->fdc = fdc;
1081 fd->fdsu = fdsu;
1082 fd->options = 0;
1083 callout_handle_init(&fd->toffhandle);
1084 callout_handle_init(&fd->tohandle);
1085
1086 switch (fdt) {
1087 case RTCFDT_12M:
1088 device_set_desc(dev, "1200-KB 5.25\" drive");
1089 fd->type = FD_1200;
1090 break;
1091 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
1092 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
1093 fdt = RTCFDT_144M;
1094 fd->type = FD_1440;
1095 case RTCFDT_144M:
1096 device_set_desc(dev, "1440-KB 3.5\" drive");
1097 fd->type = FD_1440;
1098 break;
1099 case RTCFDT_288M:
1100 case RTCFDT_288M_1:
1101 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
1102 fd->type = FD_1440;
1103 break;
1104 case RTCFDT_360K:
1105 device_set_desc(dev, "360-KB 5.25\" drive");
1106 fd->type = FD_360;
1107 break;
1108 case RTCFDT_720K:
1109 printf("720-KB 3.5\" drive");
1110 fd->type = FD_720;
1111 break;
1112 default:
1113 return (ENXIO);
1114 }
1115 return (0);
1116}
1117
1118static int
1119fd_attach(device_t dev)
1120{
1121 struct fd_data *fd;
1122#if 0
1123 int i;
1124 int mynor;
1125 int typemynor;
1126 int typesize;
1127#endif
1128 static int cdevsw_add_done = 0;
1129
1130 fd = device_get_softc(dev);
1131
1132 if (!cdevsw_add_done) {
1133 cdevsw_add(&fd_cdevsw); /* XXX */
1134 cdevsw_add_done++;
1135 }
1136 make_dev(&fd_cdevsw, (fd->fdu << 6),
1137 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu);
1138
1139#if 0
1140 /* Other make_dev() go here. */
1141#endif
1142
1143 /*
1144 * Export the drive to the devstat interface.
1145 */
1146 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1147 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1148 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1149 DEVSTAT_PRIORITY_FD);
1150 return (0);
1151}
1152
1153static int
1154fd_detach(device_t dev)
1155{
1156 struct fd_data *fd;
1157
1158 fd = device_get_softc(dev);
1159 untimeout(fd_turnoff, fd, fd->toffhandle);
1160
1161 return (0);
1162}
1163
1164static device_method_t fd_methods[] = {
1165 /* Device interface */
1166 DEVMETHOD(device_probe, fd_probe),
1167 DEVMETHOD(device_attach, fd_attach),
1168 DEVMETHOD(device_detach, fd_detach),
1169 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1170 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1171 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1172
1173 { 0, 0 }
1174};
1175
1176static driver_t fd_driver = {
1177 "fd",
1178 fd_methods,
1179 sizeof(struct fd_data)
1180};
1181
1182DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1183
1184/****************************************************************************/
1185/* motor control stuff */
1186/* remember to not deselect the drive we're working on */
1187/****************************************************************************/
1188static void
1189set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1190{
1191 int fdout = fdc->fdout;
1192 int needspecify = 0;
1193
1194 if(turnon) {
1195 fdout &= ~FDO_FDSEL;
1196 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1197 } else
1198 fdout &= ~(FDO_MOEN0 << fdsu);
1199
1200 if(!turnon
1201 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1202 /* gonna turn off the last drive, put FDC to bed */
1203 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1204 else {
1205 /* make sure controller is selected and specified */
1206 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1207 needspecify = 1;
1208 fdout |= (FDO_FRST|FDO_FDMAEN);
1209 }
1210
1211 fdout_wr(fdc, fdout);
1212 fdc->fdout = fdout;
1213 TRACE1("[0x%x->FDOUT]", fdout);
1214
1215 if (needspecify) {
1216 /*
1217 * XXX
1218 * special case: since we have just woken up the FDC
1219 * from its sleep, we silently assume the command will
1220 * be accepted, and do not test for a timeout
1221 */
1222 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1223 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1224 0);
1225 if (fdc->flags & FDC_HAS_FIFO)
1226 (void) enable_fifo(fdc);
1227 }
1228}
1229
1230static void
1231fd_turnoff(void *xfd)
1232{
1233 int s;
1234 fd_p fd = xfd;
1235
1236 TRACE1("[fd%d: turnoff]", fd->fdu);
1237
1238 s = splbio();
1239 /*
1240 * Don't turn off the motor yet if the drive is active.
1241 *
1242 * If we got here, this could only mean we missed an interrupt.
1243 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1244 * after a controller reset. Just schedule a pseudo-interrupt
1245 * so the state machine gets re-entered.
1246 */
1247 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1248 fdc_intr(fd->fdc);
1249 splx(s);
1250 return;
1251 }
1252
1253 fd->flags &= ~FD_MOTOR;
1254 set_motor(fd->fdc, fd->fdsu, TURNOFF);
1255 splx(s);
1256}
1257
1258static void
1259fd_motor_on(void *xfd)
1260{
1261 int s;
1262 fd_p fd = xfd;
1263
1264 s = splbio();
1265 fd->flags &= ~FD_MOTOR_WAIT;
1266 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1267 {
1268 fdc_intr(fd->fdc);
1269 }
1270 splx(s);
1271}
1272
1273static void
1274fd_turnon(fd_p fd)
1275{
1276 if(!(fd->flags & FD_MOTOR))
1277 {
1278 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1279 set_motor(fd->fdc, fd->fdsu, TURNON);
1280 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */
1281 }
1282}
1283
1284static void
1285fdc_reset(fdc_p fdc)
1286{
1287 /* Try a reset, keep motor on */
1288 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1289 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1290 DELAY(100);
1291 /* enable FDC, but defer interrupts a moment */
1292 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1293 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1294 DELAY(100);
1295 fdout_wr(fdc, fdc->fdout);
1296 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1297
1298 /* XXX after a reset, silently believe the FDC will accept commands */
1299 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1300 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1301 0);
1302 if (fdc->flags & FDC_HAS_FIFO)
1303 (void) enable_fifo(fdc);
1304}
1305
1306/****************************************************************************/
1307/* fdc in/out */
1308/****************************************************************************/
1309/*
1310 * FDC IO functions, take care of the main status register, timeout
1311 * in case the desired status bits are never set.
1312 *
1313 * These PIO loops initially start out with short delays between
1314 * each iteration in the expectation that the required condition
1315 * is usually met quickly, so it can be handled immediately. After
1316 * about 1 ms, stepping is increased to achieve a better timing
1317 * accuracy in the calls to DELAY().
1318 */
1319static int
1320fd_in(struct fdc_data *fdc, int *ptr)
1321{
1322 int i, j, step;
1323
1324 for (j = 0, step = 1;
1325 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1326 j < FDSTS_TIMEOUT;
1327 j += step) {
1328 if (i == NE7_RQM)
1329 return (fdc_err(fdc, "ready for output in input\n"));
1330 if (j == 1000)
1331 step = 1000;
1332 DELAY(step);
1333 }
1334 if (j >= FDSTS_TIMEOUT)
1335 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1336#ifdef FDC_DEBUG
1337 i = fddata_rd(fdc);
1338 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1339 *ptr = i;
1340 return (0);
1341#else /* !FDC_DEBUG */
1342 i = fddata_rd(fdc);
1343 if (ptr)
1344 *ptr = i;
1345 return (0);
1346#endif /* FDC_DEBUG */
1347}
1348
1349static int
1350out_fdc(struct fdc_data *fdc, int x)
1351{
1352 int i, j, step;
1353
1354 for (j = 0, step = 1;
1355 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1356 j < FDSTS_TIMEOUT;
1357 j += step) {
1358 if (i == (NE7_DIO|NE7_RQM))
1359 return (fdc_err(fdc, "ready for input in output\n"));
1360 if (j == 1000)
1361 step = 1000;
1362 DELAY(step);
1363 }
1364 if (j >= FDSTS_TIMEOUT)
1365 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1366
1367 /* Send the command and return */
1368 fddata_wr(fdc, x);
1369 TRACE1("[0x%x->FDDATA]", x);
1370 return (0);
1371}
1372
1373/****************************************************************************/
1374/* fdopen/fdclose */
1375/****************************************************************************/
1376int
41c20dac 1377Fdopen(dev_t dev, int flags, int mode, struct thread *td)
984263bc
MD
1378{
1379 fdu_t fdu = FDUNIT(minor(dev));
1380 int type = FDTYPE(minor(dev));
1381 fd_p fd;
1382 fdc_p fdc;
1383
1384 /* check bounds */
1385 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1386 return (ENXIO);
1387 fdc = fd->fdc;
1388 if ((fdc == NULL) || (fd->type == NO_TYPE))
1389 return (ENXIO);
1390 if (type > NUMDENS)
1391 return (ENXIO);
1392 if (type == 0)
1393 type = fd->type;
1394 else {
1395 /*
1396 * For each type of basic drive, make sure we are trying
1397 * to open a type it can do,
1398 */
1399 if (type != fd->type) {
1400 switch (fd->type) {
1401 case FD_360:
1402 return (ENXIO);
1403 case FD_720:
1404 if ( type != FD_820
1405 && type != FD_800
1406 && type != FD_640
1407 )
1408 return (ENXIO);
1409 break;
1410 case FD_1200:
1411 switch (type) {
1412 case FD_1480:
1413 type = FD_1480in5_25;
1414 break;
1415 case FD_1440:
1416 type = FD_1440in5_25;
1417 break;
1418 case FD_1232:
1419 break;
1420 case FD_820:
1421 type = FD_820in5_25;
1422 break;
1423 case FD_800:
1424 type = FD_800in5_25;
1425 break;
1426 case FD_720:
1427 type = FD_720in5_25;
1428 break;
1429 case FD_640:
1430 type = FD_640in5_25;
1431 break;
1432 case FD_360:
1433 type = FD_360in5_25;
1434 break;
1435 default:
1436 return(ENXIO);
1437 }
1438 break;
1439 case FD_1440:
1440 if ( type != FD_1720
1441 && type != FD_1480
1442 && type != FD_1200
1443 && type != FD_820
1444 && type != FD_800
1445 && type != FD_720
1446 && type != FD_640
1447 )
1448 return(ENXIO);
1449 break;
1450 }
1451 }
1452 }
1453 fd->ft = fd_types + type - 1;
1454 fd->flags |= FD_OPEN;
1455 /*
1456 * Clearing the DMA overrun counter at open time is a bit messy.
1457 * Since we're only managing one counter per controller, opening
1458 * the second drive could mess it up. Anyway, if the DMA overrun
1459 * condition is really persistent, it will eventually time out
1460 * still. OTOH, clearing it here will ensure we'll at least start
1461 * trying again after a previous (maybe even long ago) failure.
1462 * Also, this is merely a stop-gap measure only that should not
1463 * happen during normal operation, so we can tolerate it to be a
1464 * bit sloppy about this.
1465 */
1466 fdc->dma_overruns = 0;
1467
1468 return 0;
1469}
1470
1471int
41c20dac 1472fdclose(dev_t dev, int flags, int mode, struct thread *td)
984263bc
MD
1473{
1474 fdu_t fdu = FDUNIT(minor(dev));
1475 struct fd_data *fd;
1476
1477 fd = devclass_get_softc(fd_devclass, fdu);
1478 fd->flags &= ~FD_OPEN;
1479 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1480
1481 return (0);
1482}
1483
1484/****************************************************************************/
1485/* fdstrategy */
1486/****************************************************************************/
1487void
1488fdstrategy(struct buf *bp)
1489{
1490 unsigned nblocks, blknum, cando;
1491 int s;
1492 fdu_t fdu;
1493 fdc_p fdc;
1494 fd_p fd;
1495 size_t fdblk;
1496
1497 fdu = FDUNIT(minor(bp->b_dev));
1498 fd = devclass_get_softc(fd_devclass, fdu);
1499 if (fd == 0)
1500 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1501 (u_long)major(bp->b_dev), (u_long)minor(bp->b_dev));
1502 fdc = fd->fdc;
1503 if (fd->type == NO_TYPE) {
1504 bp->b_error = ENXIO;
1505 bp->b_flags |= B_ERROR;
1506 goto bad;
1507 };
1508
1509 fdblk = 128 << (fd->ft->secsize);
1510 if (!(bp->b_flags & B_FORMAT)) {
1511 if (bp->b_blkno < 0) {
1512 printf(
1513 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
1514 fdu, (u_long)bp->b_blkno, bp->b_bcount);
1515 bp->b_error = EINVAL;
1516 bp->b_flags |= B_ERROR;
1517 goto bad;
1518 }
1519 if ((bp->b_bcount % fdblk) != 0) {
1520 bp->b_error = EINVAL;
1521 bp->b_flags |= B_ERROR;
1522 goto bad;
1523 }
1524 }
1525
1526 /*
1527 * Set up block calculations.
1528 */
1529 if (bp->b_blkno > 20000000) {
1530 /*
1531 * Reject unreasonably high block number, prevent the
1532 * multiplication below from overflowing.
1533 */
1534 bp->b_error = EINVAL;
1535 bp->b_flags |= B_ERROR;
1536 goto bad;
1537 }
1538 blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk;
1539 nblocks = fd->ft->size;
1540 bp->b_resid = 0;
1541 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1542 if (blknum <= nblocks) {
1543 cando = (nblocks - blknum) * fdblk;
1544 bp->b_resid = bp->b_bcount - cando;
1545 if (cando == 0)
1546 goto bad; /* not actually bad but EOF */
1547 } else {
1548 bp->b_error = EINVAL;
1549 bp->b_flags |= B_ERROR;
1550 goto bad;
1551 }
1552 }
1553 bp->b_pblkno = bp->b_blkno;
1554 s = splbio();
1555 bufqdisksort(&fdc->head, bp);
1556 untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */
1557
1558 /* Tell devstat we are starting on the transaction */
1559 devstat_start_transaction(&fd->device_stats);
1560 device_busy(fd->dev);
1561
1562 fdstart(fdc);
1563 splx(s);
1564 return;
1565
1566bad:
1567 biodone(bp);
1568}
1569
1570/***************************************************************\
1571* fdstart *
1572* We have just queued something.. if the controller is not busy *
1573* then simulate the case where it has just finished a command *
1574* So that it (the interrupt routine) looks on the queue for more*
1575* work to do and picks up what we just added. *
1576* If the controller is already busy, we need do nothing, as it *
1577* will pick up our work when the present work completes *
1578\***************************************************************/
1579static void
1580fdstart(struct fdc_data *fdc)
1581{
1582 int s;
1583
1584 s = splbio();
1585 if(fdc->state == DEVIDLE)
1586 {
1587 fdc_intr(fdc);
1588 }
1589 splx(s);
1590}
1591
1592static void
1593fd_iotimeout(void *xfdc)
1594{
1595 fdc_p fdc;
1596 int s;
1597
1598 fdc = xfdc;
1599 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1600
1601 /*
1602 * Due to IBM's brain-dead design, the FDC has a faked ready
1603 * signal, hardwired to ready == true. Thus, any command
1604 * issued if there's no diskette in the drive will _never_
1605 * complete, and must be aborted by resetting the FDC.
1606 * Many thanks, Big Blue!
1607 * The FDC must not be reset directly, since that would
1608 * interfere with the state machine. Instead, pretend that
1609 * the command completed but was invalid. The state machine
1610 * will reset the FDC and retry once.
1611 */
1612 s = splbio();
1613 fdc->status[0] = NE7_ST0_IC_IV;
1614 fdc->flags &= ~FDC_STAT_VALID;
1615 fdc->state = IOTIMEDOUT;
1616 fdc_intr(fdc);
1617 splx(s);
1618}
1619
1620/* just ensure it has the right spl */
1621static void
1622fd_pseudointr(void *xfdc)
1623{
1624 int s;
1625
1626 s = splbio();
1627 fdc_intr(xfdc);
1628 splx(s);
1629}
1630
1631/***********************************************************************\
1632* fdintr *
1633* keep calling the state machine until it returns a 0 *
1634* ALWAYS called at SPLBIO *
1635\***********************************************************************/
1636static void
1637fdc_intr(void *xfdc)
1638{
1639 fdc_p fdc = xfdc;
1640 while(fdstate(fdc))
1641 ;
1642}
1643
1644/*
1645 * magic pseudo-DMA initialization for YE FDC. Sets count and
1646 * direction
1647 */
1648#define SET_BCDR(fdc,wr,cnt,port) \
1649 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1650 ((cnt)-1) & 0xff); \
1651 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1652 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1653
1654/*
1655 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1656 */
1657static int fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count)
1658{
1659 u_char *cptr = (u_char *)addr;
1660
1661 if (flags & B_READ) {
1662 if (fdc->state != PIOREAD) {
1663 fdc->state = PIOREAD;
1664 return(0);
1665 };
1666 SET_BCDR(fdc, 0, count, 0);
1667 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1668 FDC_YE_DATAPORT, cptr, count);
1669 } else {
1670 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1671 FDC_YE_DATAPORT, cptr, count);
1672 SET_BCDR(fdc, 0, count, 0);
1673 };
1674 return(1);
1675}
1676
1677/***********************************************************************\
1678* The controller state machine. *
1679* if it returns a non zero value, it should be called again immediatly *
1680\***********************************************************************/
1681static int
1682fdstate(fdc_p fdc)
1683{
1684 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1685 unsigned blknum = 0, b_cylinder = 0;
1686 fdu_t fdu = fdc->fdu;
1687 fd_p fd;
1688 register struct buf *bp;
1689 struct fd_formb *finfo = NULL;
1690 size_t fdblk;
1691
1692 bp = fdc->bp;
1693 if (bp == NULL) {
1694 bp = bufq_first(&fdc->head);
1695 if (bp != NULL) {
1696 bufq_remove(&fdc->head, bp);
1697 fdc->bp = bp;
1698 }
1699 }
1700 if (bp == NULL) {
1701 /***********************************************\
1702 * nothing left for this controller to do *
1703 * Force into the IDLE state, *
1704 \***********************************************/
1705 fdc->state = DEVIDLE;
1706 if (fdc->fd) {
1707 device_printf(fdc->fdc_dev,
1708 "unexpected valid fd pointer\n");
1709 fdc->fd = (fd_p) 0;
1710 fdc->fdu = -1;
1711 }
1712 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1713 return (0);
1714 }
1715 fdu = FDUNIT(minor(bp->b_dev));
1716 fd = devclass_get_softc(fd_devclass, fdu);
1717 fdblk = 128 << fd->ft->secsize;
1718 if (fdc->fd && (fd != fdc->fd))
1719 device_printf(fd->dev, "confused fd pointers\n");
1720 read = bp->b_flags & B_READ;
1721 format = bp->b_flags & B_FORMAT;
1722 if (format) {
1723 finfo = (struct fd_formb *)bp->b_data;
1724 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1725 - (char *)finfo;
1726 }
1727 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1728 blknum = (unsigned) bp->b_pblkno * DEV_BSIZE/fdblk +
1729 fd->skip/fdblk;
1730 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1731 }
1732 TRACE1("fd%d", fdu);
1733 TRACE1("[%s]", fdstates[fdc->state]);
1734 TRACE1("(0x%x)", fd->flags);
1735 untimeout(fd_turnoff, fd, fd->toffhandle);
1736 fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz);
1737 switch (fdc->state)
1738 {
1739 case DEVIDLE:
1740 case FINDWORK: /* we have found new work */
1741 fdc->retry = 0;
1742 fd->skip = 0;
1743 fdc->fd = fd;
1744 fdc->fdu = fdu;
1745 fdc->fdctl_wr(fdc, fd->ft->trans);
1746 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1747 /*******************************************************\
1748 * If the next drive has a motor startup pending, then *
1749 * it will start up in its own good time *
1750 \*******************************************************/
1751 if(fd->flags & FD_MOTOR_WAIT) {
1752 fdc->state = MOTORWAIT;
1753 return (0); /* come back later */
1754 }
1755 /*******************************************************\
1756 * Maybe if it's not starting, it SHOULD be starting *
1757 \*******************************************************/
1758 if (!(fd->flags & FD_MOTOR))
1759 {
1760 fdc->state = MOTORWAIT;
1761 fd_turnon(fd);
1762 return (0);
1763 }
1764 else /* at least make sure we are selected */
1765 {
1766 set_motor(fdc, fd->fdsu, TURNON);
1767 }
1768 if (fdc->flags & FDC_NEEDS_RESET) {
1769 fdc->state = RESETCTLR;
1770 fdc->flags &= ~FDC_NEEDS_RESET;
1771 } else
1772 fdc->state = DOSEEK;
1773 break;
1774 case DOSEEK:
1775 if (b_cylinder == (unsigned)fd->track)
1776 {
1777 fdc->state = SEEKCOMPLETE;
1778 break;
1779 }
1780 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1781 fd->fdsu, b_cylinder * fd->ft->steptrac,
1782 0))
1783 {
1784 /*
1785 * seek command not accepted, looks like
1786 * the FDC went off to the Saints...
1787 */
1788 fdc->retry = 6; /* try a reset */
1789 return(retrier(fdc));
1790 }
1791 fd->track = FD_NO_TRACK;
1792 fdc->state = SEEKWAIT;
1793 return(0); /* will return later */
1794 case SEEKWAIT:
1795 /* allow heads to settle */
1796 timeout(fd_pseudointr, fdc, hz / 16);
1797 fdc->state = SEEKCOMPLETE;
1798 return(0); /* will return later */
1799 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1800 /* Make sure seek really happened*/
1801 if(fd->track == FD_NO_TRACK) {
1802 int descyl = b_cylinder * fd->ft->steptrac;
1803 do {
1804 /*
1805 * This might be a "ready changed" interrupt,
1806 * which cannot really happen since the
1807 * RDY pin is hardwired to + 5 volts. This
1808 * generally indicates a "bouncing" intr
1809 * line, so do one of the following:
1810 *
1811 * When running on an enhanced FDC that is
1812 * known to not go stuck after responding
1813 * with INVALID, fetch all interrupt states
1814 * until seeing either an INVALID or a
1815 * real interrupt condition.
1816 *
1817 * When running on a dumb old NE765, give
1818 * up immediately. The controller will
1819 * provide up to four dummy RC interrupt
1820 * conditions right after reset (for the
1821 * corresponding four drives), so this is
1822 * our only chance to get notice that it
1823 * was not the FDC that caused the interrupt.
1824 */
1825 if (fd_sense_int(fdc, &st0, &cyl)
1826 == FD_NOT_VALID)
1827 return 0;
1828 if(fdc->fdct == FDC_NE765
1829 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1830 return 0; /* hope for a real intr */
1831 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1832
1833 if (0 == descyl) {
1834 int failed = 0;
1835 /*
1836 * seek to cyl 0 requested; make sure we are
1837 * really there
1838 */
1839 if (fd_sense_drive_status(fdc, &st3))
1840 failed = 1;
1841 if ((st3 & NE7_ST3_T0) == 0) {
1842 printf(
1843 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1844 fdu, st3, NE7_ST3BITS);
1845 failed = 1;
1846 }
1847
1848 if (failed) {
1849 if(fdc->retry < 3)
1850 fdc->retry = 3;
1851 return (retrier(fdc));
1852 }
1853 }
1854
1855 if (cyl != descyl) {
1856 printf(
1857 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1858 fdu, descyl, cyl, st0);
1859 if (fdc->retry < 3)
1860 fdc->retry = 3;
1861 return (retrier(fdc));
1862 }
1863 }
1864
1865 fd->track = b_cylinder;
1866 if (!(fdc->flags & FDC_NODMA))
1867 isa_dmastart(bp->b_flags, bp->b_data+fd->skip,
1868 format ? bp->b_bcount : fdblk, fdc->dmachan);
1869 sectrac = fd->ft->sectrac;
1870 sec = blknum % (sectrac * fd->ft->heads);
1871 head = sec / sectrac;
1872 sec = sec % sectrac + 1;
1873 fd->hddrv = ((head&1)<<2)+fdu;
1874
1875 if(format || !read)
1876 {
1877 /* make sure the drive is writable */
1878 if(fd_sense_drive_status(fdc, &st3) != 0)
1879 {
1880 /* stuck controller? */
1881 if (!(fdc->flags & FDC_NODMA))
1882 isa_dmadone(bp->b_flags,
1883 bp->b_data + fd->skip,
1884 format ? bp->b_bcount : fdblk,
1885 fdc->dmachan);
1886 fdc->retry = 6; /* reset the beast */
1887 return (retrier(fdc));
1888 }
1889 if(st3 & NE7_ST3_WP)
1890 {
1891 /*
1892 * XXX YES! this is ugly.
1893 * in order to force the current operation
1894 * to fail, we will have to fake an FDC
1895 * error - all error handling is done
1896 * by the retrier()
1897 */
1898 fdc->status[0] = NE7_ST0_IC_AT;
1899 fdc->status[1] = NE7_ST1_NW;
1900 fdc->status[2] = 0;
1901 fdc->status[3] = fd->track;
1902 fdc->status[4] = head;
1903 fdc->status[5] = sec;
1904 fdc->retry = 8; /* break out immediately */
1905 fdc->state = IOTIMEDOUT; /* not really... */
1906 return (1);
1907 }
1908 }
1909
1910 if (format) {
1911 if (fdc->flags & FDC_NODMA) {
1912 /*
1913 * This seems to be necessary for
1914 * whatever obscure reason; if we omit
1915 * it, we end up filling the sector ID
1916 * fields of the newly formatted track
1917 * entirely with garbage, causing
1918 * `wrong cylinder' errors all over
1919 * the place when trying to read them
1920 * back.
1921 *
1922 * Umpf.
1923 */
1924 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1925
1926 (void)fdcpio(fdc,bp->b_flags,
1927 bp->b_data+fd->skip,
1928 bp->b_bcount);
1929
1930 }
1931 /* formatting */
1932 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1933 finfo->fd_formb_secshift,
1934 finfo->fd_formb_nsecs,
1935 finfo->fd_formb_gaplen,
1936 finfo->fd_formb_fillbyte, 0)) {
1937 /* controller fell over */
1938 if (!(fdc->flags & FDC_NODMA))
1939 isa_dmadone(bp->b_flags,
1940 bp->b_data + fd->skip,
1941 format ? bp->b_bcount : fdblk,
1942 fdc->dmachan);
1943 fdc->retry = 6;
1944 return (retrier(fdc));
1945 }
1946 } else {
1947 if (fdc->flags & FDC_NODMA) {
1948 /*
1949 * this seems to be necessary even when
1950 * reading data
1951 */
1952 SET_BCDR(fdc, 1, fdblk, 0);
1953
1954 /*
1955 * perform the write pseudo-DMA before
1956 * the WRITE command is sent
1957 */
1958 if (!read)
1959 (void)fdcpio(fdc,bp->b_flags,
1960 bp->b_data+fd->skip,
1961 fdblk);
1962 }
1963 if (fd_cmd(fdc, 9,
1964 (read ? NE7CMD_READ : NE7CMD_WRITE),
1965 head << 2 | fdu, /* head & unit */
1966 fd->track, /* track */
1967 head,
1968 sec, /* sector + 1 */
1969 fd->ft->secsize, /* sector size */
1970 sectrac, /* sectors/track */
1971 fd->ft->gap, /* gap size */
1972 fd->ft->datalen, /* data length */
1973 0)) {
1974 /* the beast is sleeping again */
1975 if (!(fdc->flags & FDC_NODMA))
1976 isa_dmadone(bp->b_flags,
1977 bp->b_data + fd->skip,
1978 format ? bp->b_bcount : fdblk,
1979 fdc->dmachan);
1980 fdc->retry = 6;
1981 return (retrier(fdc));
1982 }
1983 }
1984 if (fdc->flags & FDC_NODMA)
1985 /*
1986 * if this is a read, then simply await interrupt
1987 * before performing PIO
1988 */
1989 if (read && !fdcpio(fdc,bp->b_flags,
1990 bp->b_data+fd->skip,fdblk)) {
1991 fd->tohandle = timeout(fd_iotimeout, fdc, hz);
1992 return(0); /* will return later */
1993 };
1994
1995 /*
1996 * write (or format) operation will fall through and
1997 * await completion interrupt
1998 */
1999 fdc->state = IOCOMPLETE;
2000 fd->tohandle = timeout(fd_iotimeout, fdc, hz);
2001 return (0); /* will return later */
2002 case PIOREAD:
2003 /*
2004 * actually perform the PIO read. The IOCOMPLETE case
2005 * removes the timeout for us.
2006 */
2007 (void)fdcpio(fdc,bp->b_flags,bp->b_data+fd->skip,fdblk);
2008 fdc->state = IOCOMPLETE;
2009 /* FALLTHROUGH */
2010 case IOCOMPLETE: /* IO DONE, post-analyze */
2011 untimeout(fd_iotimeout, fdc, fd->tohandle);
2012
2013 if (fd_read_status(fdc, fd->fdsu)) {
2014 if (!(fdc->flags & FDC_NODMA))
2015 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
2016 format ? bp->b_bcount : fdblk,
2017 fdc->dmachan);
2018 if (fdc->retry < 6)
2019 fdc->retry = 6; /* force a reset */
2020 return (retrier(fdc));
2021 }
2022
2023 fdc->state = IOTIMEDOUT;
2024
2025 /* FALLTHROUGH */
2026
2027 case IOTIMEDOUT:
2028 if (!(fdc->flags & FDC_NODMA))
2029 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
2030 format ? bp->b_bcount : fdblk, fdc->dmachan);
2031 if (fdc->status[0] & NE7_ST0_IC) {
2032 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2033 && fdc->status[1] & NE7_ST1_OR) {
2034 /*
2035 * DMA overrun. Someone hogged the bus and
2036 * didn't release it in time for the next
2037 * FDC transfer.
2038 *
2039 * We normally restart this without bumping
2040 * the retry counter. However, in case
2041 * something is seriously messed up (like
2042 * broken hardware), we rather limit the
2043 * number of retries so the IO operation
2044 * doesn't block indefinately.
2045 */
2046 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
2047 fdc->state = SEEKCOMPLETE;
2048 return (1);
2049 } /* else fall through */
2050 }
2051 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
2052 && fdc->retry < 6)
2053 fdc->retry = 6; /* force a reset */
2054 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2055 && fdc->status[2] & NE7_ST2_WC
2056 && fdc->retry < 3)
2057 fdc->retry = 3; /* force recalibrate */
2058 return (retrier(fdc));
2059 }
2060 /* All OK */
2061 /* Operation successful, retry DMA overruns again next time. */
2062 fdc->dma_overruns = 0;
2063 fd->skip += fdblk;
2064 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
2065 /* set up next transfer */
2066 fdc->state = DOSEEK;
2067 } else {
2068 /* ALL DONE */
2069 fd->skip = 0;
2070 fdc->bp = NULL;
2071 device_unbusy(fd->dev);
2072 devstat_end_transaction_buf(&fd->device_stats, bp);
2073 biodone(bp);
2074 fdc->fd = (fd_p) 0;
2075 fdc->fdu = -1;
2076 fdc->state = FINDWORK;
2077 }
2078 return (1);
2079 case RESETCTLR:
2080 fdc_reset(fdc);
2081 fdc->retry++;
2082 fdc->state = RESETCOMPLETE;
2083 return (0);
2084 case RESETCOMPLETE:
2085 /*
2086 * Discard all the results from the reset so that they
2087 * can't cause an unexpected interrupt later.
2088 */
2089 for (i = 0; i < 4; i++)
2090 (void)fd_sense_int(fdc, &st0, &cyl);
2091 fdc->state = STARTRECAL;
2092 /* Fall through. */
2093 case STARTRECAL:
2094 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
2095 /* arrgl */
2096 fdc->retry = 6;
2097 return (retrier(fdc));
2098 }
2099 fdc->state = RECALWAIT;
2100 return (0); /* will return later */
2101 case RECALWAIT:
2102 /* allow heads to settle */
2103 timeout(fd_pseudointr, fdc, hz / 8);
2104 fdc->state = RECALCOMPLETE;
2105 return (0); /* will return later */
2106 case RECALCOMPLETE:
2107 do {
2108 /*
2109 * See SEEKCOMPLETE for a comment on this:
2110 */
2111 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2112 return 0;
2113 if(fdc->fdct == FDC_NE765
2114 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2115 return 0; /* hope for a real intr */
2116 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2117 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2118 {
2119 if(fdc->retry > 3)
2120 /*
2121 * a recalibrate from beyond cylinder 77
2122 * will "fail" due to the FDC limitations;
2123 * since people used to complain much about
2124 * the failure message, try not logging
2125 * this one if it seems to be the first
2126 * time in a line
2127 */
2128 printf("fd%d: recal failed ST0 %b cyl %d\n",
2129 fdu, st0, NE7_ST0BITS, cyl);
2130 if(fdc->retry < 3) fdc->retry = 3;
2131 return (retrier(fdc));
2132 }
2133 fd->track = 0;
2134 /* Seek (probably) necessary */
2135 fdc->state = DOSEEK;
2136 return (1); /* will return immediatly */
2137 case MOTORWAIT:
2138 if(fd->flags & FD_MOTOR_WAIT)
2139 {
2140 return (0); /* time's not up yet */
2141 }
2142 if (fdc->flags & FDC_NEEDS_RESET) {
2143 fdc->state = RESETCTLR;
2144 fdc->flags &= ~FDC_NEEDS_RESET;
2145 } else {
2146 /*
2147 * If all motors were off, then the controller was
2148 * reset, so it has lost track of the current
2149 * cylinder. Recalibrate to handle this case.
2150 * But first, discard the results of the reset.
2151 */
2152 fdc->state = RESETCOMPLETE;
2153 }
2154 return (1); /* will return immediatly */
2155 default:
2156 device_printf(fdc->fdc_dev, "unexpected FD int->");
2157 if (fd_read_status(fdc, fd->fdsu) == 0)
2158 printf("FDC status :%x %x %x %x %x %x %x ",
2159 fdc->status[0],
2160 fdc->status[1],
2161 fdc->status[2],
2162 fdc->status[3],
2163 fdc->status[4],
2164 fdc->status[5],
2165 fdc->status[6] );
2166 else
2167 printf("No status available ");
2168 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2169 {
2170 printf("[controller is dead now]\n");
2171 return (0);
2172 }
2173 printf("ST0 = %x, PCN = %x\n", st0, cyl);
2174 return (0);
2175 }
2176 /*XXX confusing: some branches return immediately, others end up here*/
2177 return (1); /* Come back immediatly to new state */
2178}
2179
2180static int
2181retrier(struct fdc_data *fdc)
2182{
2183 register struct buf *bp;
2184 struct fd_data *fd;
2185 int fdu;
2186
2187 bp = fdc->bp;
2188
2189 /* XXX shouldn't this be cached somewhere? */
2190 fdu = FDUNIT(minor(bp->b_dev));
2191 fd = devclass_get_softc(fd_devclass, fdu);
2192 if (fd->options & FDOPT_NORETRY)
2193 goto fail;
2194
2195 switch (fdc->retry) {
2196 case 0: case 1: case 2:
2197 fdc->state = SEEKCOMPLETE;
2198 break;
2199 case 3: case 4: case 5:
2200 fdc->state = STARTRECAL;
2201 break;
2202 case 6:
2203 fdc->state = RESETCTLR;
2204 break;
2205 case 7:
2206 break;
2207 default:
2208 fail:
2209 {
2210 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2211 dev_t sav_b_dev = bp->b_dev;
2212
2213 /* Trick diskerr */
2214 bp->b_dev = makedev(major(bp->b_dev),
2215 (FDUNIT(minor(bp->b_dev))<<3)|RAW_PART);
2216 if (printerror)
2217 diskerr(bp, "hard error", LOG_PRINTF,
2218 fdc->fd->skip / DEV_BSIZE,
2219 (struct disklabel *)NULL);
2220 bp->b_dev = sav_b_dev;
2221 if (printerror) {
2222 if (fdc->flags & FDC_STAT_VALID)
2223 printf(
2224 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2225 fdc->status[0], NE7_ST0BITS,
2226 fdc->status[1], NE7_ST1BITS,
2227 fdc->status[2], NE7_ST2BITS,
2228 fdc->status[3], fdc->status[4],
2229 fdc->status[5]);
2230 else
2231 printf(" (No status)\n");
2232 }
2233 }
2234 bp->b_flags |= B_ERROR;
2235 bp->b_error = EIO;
2236 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2237 fdc->bp = NULL;
2238 fdc->fd->skip = 0;
2239 device_unbusy(fd->dev);
2240 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2241 biodone(bp);
2242 fdc->state = FINDWORK;
2243 fdc->flags |= FDC_NEEDS_RESET;
2244 fdc->fd = (fd_p) 0;
2245 fdc->fdu = -1;
2246 return (1);
2247 }
2248 fdc->retry++;
2249 return (1);
2250}
2251
2252static int
41c20dac 2253fdformat(dev_t dev, struct fd_formb *finfo, struct thread *td)
984263bc 2254{
41c20dac 2255 struct proc *p = td->td_proc;
984263bc
MD
2256 fdu_t fdu;
2257 fd_p fd;
2258
2259 struct buf *bp;
2260 int rv = 0, s;
2261 size_t fdblk;
2262
2263 fdu = FDUNIT(minor(dev));
2264 fd = devclass_get_softc(fd_devclass, fdu);
2265 fdblk = 128 << fd->ft->secsize;
2266
2267 /* set up a buffer header for fdstrategy() */
2268 bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT);
2269 if(bp == 0)
2270 return ENOBUFS;
2271 /*
2272 * keep the process from being swapped
2273 */
2274 PHOLD(p);
2275 bzero((void *)bp, sizeof(struct buf));
2276 BUF_LOCKINIT(bp);
2277 BUF_LOCK(bp, LK_EXCLUSIVE);
2278 bp->b_flags = B_PHYS | B_FORMAT;
2279
2280 /*
2281 * calculate a fake blkno, so fdstrategy() would initiate a
2282 * seek to the requested cylinder
2283 */
2284 bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
2285 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
2286
2287 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2288 bp->b_data = (caddr_t)finfo;
2289
2290 /* now do the format */
2291 bp->b_dev = dev;
2292 BUF_STRATEGY(bp, 0);
2293
2294 /* ...and wait for it to complete */
2295 s = splbio();
2296 while(!(bp->b_flags & B_DONE)) {
377d4740 2297 rv = tsleep((caddr_t)bp, 0, "fdform", 20 * hz);
984263bc
MD
2298 if (rv == EWOULDBLOCK)
2299 break;
2300 }
2301 splx(s);
2302
2303 if (rv == EWOULDBLOCK) {
2304 /* timed out */
2305 rv = EIO;
2306 device_unbusy(fd->dev);
2307 biodone(bp);
2308 }
2309 if (bp->b_flags & B_ERROR)
2310 rv = bp->b_error;
2311 /*
2312 * allow the process to be swapped
2313 */
2314 PRELE(p);
2315 BUF_UNLOCK(bp);
2316 BUF_LOCKFREE(bp);
2317 free(bp, M_TEMP);
2318 return rv;
2319}
2320
2321/*
2322 * TODO: don't allocate buffer on stack.
2323 */
2324
2325static int
41c20dac 2326fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
984263bc
MD
2327{
2328 fdu_t fdu = FDUNIT(minor(dev));
2329 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2330 size_t fdblk;
2331
2332 struct fd_type *fdt;
2333 struct disklabel *dl;
2334 struct fdc_status *fsp;
2335 char buffer[DEV_BSIZE];
2336 int error = 0;
2337
2338 fdblk = 128 << fd->ft->secsize;
2339
2340 switch (cmd) {
2341 case DIOCGDINFO:
2342 bzero(buffer, sizeof (buffer));
2343 dl = (struct disklabel *)buffer;
2344 dl->d_secsize = fdblk;
2345 fdt = fd->ft;
2346 dl->d_secpercyl = fdt->size / fdt->tracks;
2347 dl->d_type = DTYPE_FLOPPY;
2348
2349 if (readdisklabel(dev, dl)
2350 == NULL)
2351 error = 0;
2352 else
2353 error = EINVAL;
2354
2355 *(struct disklabel *)addr = *dl;
2356 break;
2357
2358 case DIOCSDINFO:
2359 if ((flag & FWRITE) == 0)
2360 error = EBADF;
2361 break;
2362
2363 case DIOCWLABEL:
2364 if ((flag & FWRITE) == 0)
2365 error = EBADF;
2366 break;
2367
2368 case DIOCWDINFO:
2369 if ((flag & FWRITE) == 0) {
2370 error = EBADF;
2371 break;
2372 }
2373
2374 dl = (struct disklabel *)addr;
2375
2376 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2377 (u_long)0)) != 0)
2378 break;
2379
2380 error = writedisklabel(dev, (struct disklabel *)buffer);
2381 break;
2382 case FD_FORM:
2383 if ((flag & FWRITE) == 0)
2384 error = EBADF; /* must be opened for writing */
2385 else if (((struct fd_formb *)addr)->format_version !=
2386 FD_FORMAT_VERSION)
2387 error = EINVAL; /* wrong version of formatting prog */
2388 else
41c20dac 2389 error = fdformat(dev, (struct fd_formb *)addr, td);
984263bc
MD
2390 break;
2391
2392 case FD_GTYPE: /* get drive type */
2393 *(struct fd_type *)addr = *fd->ft;
2394 break;
2395
2396 case FD_STYPE: /* set drive type */
2397 /* this is considered harmful; only allow for superuser */
dadab5e9 2398 if (suser(td) != 0)
984263bc
MD
2399 return EPERM;
2400 *fd->ft = *(struct fd_type *)addr;
2401 break;
2402
2403 case FD_GOPTS: /* get drive options */
2404 *(int *)addr = fd->options;
2405 break;
2406
2407 case FD_SOPTS: /* set drive options */
2408 fd->options = *(int *)addr;
2409 break;
2410
2411 case FD_GSTAT:
2412 fsp = (struct fdc_status *)addr;
2413 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2414 return EINVAL;
2415 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2416 break;
2417
2418 default:
2419 error = ENOTTY;
2420 break;
2421 }
2422 return (error);
2423}
2424
2425/*
2426 * Hello emacs, these are the
2427 * Local Variables:
2428 * c-indent-level: 8
2429 * c-continued-statement-offset: 8
2430 * c-continued-brace-offset: 0
2431 * c-brace-offset: -8
2432 * c-brace-imaginary-offset: 0
2433 * c-argdecl-indent: 8
2434 * c-label-offset: -8
2435 * c++-hanging-braces: 1
2436 * c++-access-specifier-offset: -8
2437 * c++-empty-arglist-indent: 8
2438 * c++-friend-offset: 0
2439 * End:
2440 */