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DEVFS - remove dev_ops_add(), dev_ops_get(), and get_dev()
[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 $
c755a6ff 54 * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.43 2008/08/13 08:18:09 swildner Exp $
984263bc
MD		 55 *
56 */
57
58#include "opt_fdc.h"
666d2603 59#include "use_pccard.h"
984263bc
MD		 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>
983105c1
MD		 68#include <sys/diskslice.h>
69#include <sys/disk.h>
984263bc
MD		 70#include <sys/devicestat.h>
71#include <sys/fcntl.h>
72#include <sys/malloc.h>
73#include <sys/module.h>
74#include <sys/proc.h>
895c1f85 75#include <sys/priv.h>
984263bc 76#include <sys/syslog.h>
335dda38 77#include <sys/device.h>
984263bc 78#include <sys/bus.h>
984263bc 79#include <sys/rman.h>
3020e3be 80#include <sys/buf2.h>
fbe276c7 81#include <sys/thread2.h>
3020e3be 82
984263bc
MD		 83#include <machine/clock.h>
84#include <machine/ioctl_fd.h>
984263bc
MD		 85#include <machine/stdarg.h>
86
1f2de5d4
MD		 87#include <bus/isa/isavar.h>
88#include <bus/isa/isareg.h>
89#include "fdreg.h"
90#include "fdc.h"
91#include <bus/isa/rtc.h>
984263bc 92
984263bc
MD		 93/* configuration flags */
94#define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
95#define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
96
97/* internally used only, not really from CMOS: */
98#define RTCFDT_144M_PRETENDED 0x1000
99
100/* error returns for fd_cmd() */
101#define FD_FAILED -1
102#define FD_NOT_VALID -2
103#define FDC_ERRMAX 100 /* do not log more */
104/*
105 * Stop retrying after this many DMA overruns. Since each retry takes
106 * one revolution, with 300 rpm., 25 retries take approximately 10
107 * seconds which the read attempt will block in case the DMA overrun
108 * is persistent.
109 */
110#define FDC_DMAOV_MAX 25
111
112/*
113 * Timeout value for the PIO loops to wait until the FDC main status
114 * register matches our expectations (request for master, direction
115 * bit). This is supposed to be a number of microseconds, although
116 * timing might actually not be very accurate.
117 *
118 * Timeouts of 100 msec are believed to be required for some broken
119 * (old) hardware.
120 */
121#define FDSTS_TIMEOUT 100000
122
123#define NUMTYPES 17
124#define NUMDENS (NUMTYPES - 7)
125
126/* These defines (-1) must match index for fd_types */
127#define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
128#define NO_TYPE 0 /* must match NO_TYPE in ft.c */
129#define FD_1720 1
130#define FD_1480 2
131#define FD_1440 3
132#define FD_1200 4
133#define FD_820 5
134#define FD_800 6
135#define FD_720 7
136#define FD_360 8
137#define FD_640 9
138#define FD_1232 10
139
140#define FD_1480in5_25 11
141#define FD_1440in5_25 12
142#define FD_820in5_25 13
143#define FD_800in5_25 14
144#define FD_720in5_25 15
145#define FD_360in5_25 16
146#define FD_640in5_25 17
147
148
149static struct fd_type fd_types[NUMTYPES] =
150{
151{ 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
152{ 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
153{ 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
154{ 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
155{ 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
156{ 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
157{ 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
158{ 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
159{ 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
160{ 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
161
162{ 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
163{ 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
164{ 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
165{ 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
166{ 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
167{ 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
168{ 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
169};
170
171#define DRVS_PER_CTLR 2 /* 2 floppies */
172
173/***********************************************************************\
174* Per controller structure. *
175\***********************************************************************/
8c5c0470 176devclass_t fdc_devclass;
984263bc
MD		 177
178/***********************************************************************\
179* Per drive structure. *
180* N per controller (DRVS_PER_CTLR) *
181\***********************************************************************/
182struct fd_data {
183 struct fdc_data *fdc; /* pointer to controller structure */
184 int fdsu; /* this units number on this controller */
185 int type; /* Drive type (FD_1440...) */
983105c1 186 struct fd_type ft; /* the type descriptor */
984263bc
MD		 187 int flags;
188#define FD_OPEN 0x01 /* it's open */
189#define FD_ACTIVE 0x02 /* it's active */
190#define FD_MOTOR 0x04 /* motor should be on */
191#define FD_MOTOR_WAIT 0x08 /* motor coming up */
192 int skip;
193 int hddrv;
194#define FD_NO_TRACK -2
195 int track; /* where we think the head is */
196 int options; /* user configurable options, see ioctl_fd.h */
e8b273ff
MD		 197 struct callout toffhandle;
198 struct callout tohandle;
4fc46503 199 struct callout motor;
983105c1 200 struct disk disk;
984263bc
MD		 201 struct devstat device_stats;
202 device_t dev;
203 fdu_t fdu;
204};
205
206struct fdc_ivars {
207 int fdunit;
208};
209static devclass_t fd_devclass;
210
211/***********************************************************************\
212* Throughout this file the following conventions will be used: *
213* fd is a pointer to the fd_data struct for the drive in question *
214* fdc is a pointer to the fdc_data struct for the controller *
215* fdu is the floppy drive unit number *
216* fdcu is the floppy controller unit number *
217* fdsu is the floppy drive unit number on that controller. (sub-unit) *
218\***********************************************************************/
219
220/* internal functions */
221static void fdc_intr(void *);
222static void set_motor(struct fdc_data *, int, int);
223# define TURNON 1
224# define TURNOFF 0
225static timeout_t fd_turnoff;
226static timeout_t fd_motor_on;
227static void fd_turnon(struct fd_data *);
228static void fdc_reset(fdc_p);
229static int fd_in(struct fdc_data *, int *);
230static int out_fdc(struct fdc_data *, int);
231static void fdstart(struct fdc_data *);
232static timeout_t fd_iotimeout;
233static timeout_t fd_pseudointr;
234static int fdstate(struct fdc_data *);
235static int retrier(struct fdc_data *);
b13267a5 236static int fdformat(cdev_t, struct fd_formb *, struct ucred *);
984263bc
MD		 237
238static int enable_fifo(fdc_p fdc);
239
240static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
241
242
243#define DEVIDLE 0
244#define FINDWORK 1
245#define DOSEEK 2
246#define SEEKCOMPLETE 3
247#define IOCOMPLETE 4
248#define RECALCOMPLETE 5
249#define STARTRECAL 6
250#define RESETCTLR 7
251#define SEEKWAIT 8
252#define RECALWAIT 9
253#define MOTORWAIT 10
254#define IOTIMEDOUT 11
255#define RESETCOMPLETE 12
256#define PIOREAD 13
257
258#ifdef FDC_DEBUG
259static char const * const fdstates[] =
260{
261"DEVIDLE",
262"FINDWORK",
263"DOSEEK",
264"SEEKCOMPLETE",
265"IOCOMPLETE",
266"RECALCOMPLETE",
267"STARTRECAL",
268"RESETCTLR",
269"SEEKWAIT",
270"RECALWAIT",
271"MOTORWAIT",
272"IOTIMEDOUT",
273"RESETCOMPLETE",
274"PIOREAD",
275};
276
277/* CAUTION: fd_debug causes huge amounts of logging output */
278static int volatile fd_debug = 0;
e3869ec7
SW		 279#define TRACE0(arg) if(fd_debug) kprintf(arg)
280#define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2)
984263bc
MD		 281#else /* FDC_DEBUG */
282#define TRACE0(arg)
283#define TRACE1(arg1, arg2)
284#endif /* FDC_DEBUG */
285
8c5c0470 286void
984263bc
MD		 287fdout_wr(fdc_p fdc, u_int8_t v)
288{
289 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
290}
291
292static u_int8_t
293fdsts_rd(fdc_p fdc)
294{
295 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
296}
297
298static void
299fddata_wr(fdc_p fdc, u_int8_t v)
300{
301 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
302}
303
304static u_int8_t
305fddata_rd(fdc_p fdc)
306{
307 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
308}
309
310static void
311fdctl_wr_isa(fdc_p fdc, u_int8_t v)
312{
313 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
314}
315
984263bc
MD		 316#if 0
317
318static u_int8_t
319fdin_rd(fdc_p fdc)
320{
321 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
322}
323
324#endif
325
326static d_open_t Fdopen; /* NOTE, not fdopen */
327static d_close_t fdclose;
328static d_ioctl_t fdioctl;
329static d_strategy_t fdstrategy;
330
fef8985e
MD		 331static struct dev_ops fd_ops = {
332 { "fd", FD_CDEV_MAJOR, D_DISK },
333 .d_open = Fdopen,
334 .d_close = fdclose,
335 .d_read = physread,
336 .d_write = physwrite,
337 .d_ioctl = fdioctl,
338 .d_strategy = fdstrategy,
984263bc
MD		 339};
340
341static int
342fdc_err(struct fdc_data *fdc, const char *s)
343{
344 fdc->fdc_errs++;
345 if (s) {
346 if (fdc->fdc_errs < FDC_ERRMAX)
347 device_printf(fdc->fdc_dev, "%s", s);
348 else if (fdc->fdc_errs == FDC_ERRMAX)
349 device_printf(fdc->fdc_dev, "too many errors, not "
350 "logging any more\n");
351 }
352
353 return FD_FAILED;
354}
355
356/*
357 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
358 * Unit number,
359 * # of output bytes, output bytes as ints ...,
360 * # of input bytes, input bytes as ints ...
361 */
8c5c0470 362int
984263bc
MD		 363fd_cmd(struct fdc_data *fdc, int n_out, ...)
364{
365 u_char cmd;
366 int n_in;
367 int n;
e2565a42 368 __va_list ap;
984263bc 369
e2565a42
MD		 370 __va_start(ap, n_out);
371 cmd = (u_char)(__va_arg(ap, int));
372 __va_end(ap);
373 __va_start(ap, n_out);
984263bc
MD		 374 for (n = 0; n < n_out; n++)
375 {
e2565a42 376 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
984263bc
MD		 377 {
378 char msg[50];
f8c7a42d 379 ksnprintf(msg, sizeof(msg),
984263bc
MD		 380 "cmd %x failed at out byte %d of %d\n",
381 cmd, n + 1, n_out);
382 return fdc_err(fdc, msg);
383 }
384 }
e2565a42 385 n_in = __va_arg(ap, int);
984263bc
MD		 386 for (n = 0; n < n_in; n++)
387 {
e2565a42 388 int *ptr = __va_arg(ap, int *);
984263bc
MD		 389 if (fd_in(fdc, ptr) < 0)
390 {
391 char msg[50];
f8c7a42d 392 ksnprintf(msg, sizeof(msg),
984263bc
MD		 393 "cmd %02x failed at in byte %d of %d\n",
394 cmd, n + 1, n_in);
395 return fdc_err(fdc, msg);
396 }
397 }
398
399 return 0;
400}
401
402static int
403enable_fifo(fdc_p fdc)
404{
405 int i, j;
406
407 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
408
409 /*
410 * XXX:
411 * Cannot use fd_cmd the normal way here, since
412 * this might be an invalid command. Thus we send the
413 * first byte, and check for an early turn of data directon.
414 */
415
416 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
417 return fdc_err(fdc, "Enable FIFO failed\n");
418
419 /* If command is invalid, return */
420 j = FDSTS_TIMEOUT;
421 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
422 != NE7_RQM && j-- > 0) {
423 if (i == (NE7_DIO | NE7_RQM)) {
424 fdc_reset(fdc);
425 return FD_FAILED;
426 }
427 DELAY(1);
428 }
429 if (j<0 ||
430 fd_cmd(fdc, 3,
431 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
432 fdc_reset(fdc);
433 return fdc_err(fdc, "Enable FIFO failed\n");
434 }
435 fdc->flags |= FDC_HAS_FIFO;
436 return 0;
437 }
438 if (fd_cmd(fdc, 4,
439 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
440 return fdc_err(fdc, "Re-enable FIFO failed\n");
441 return 0;
442}
443
444static int
445fd_sense_drive_status(fdc_p fdc, int *st3p)
446{
447 int st3;
448
449 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
450 {
451 return fdc_err(fdc, "Sense Drive Status failed\n");
452 }
453 if (st3p)
454 *st3p = st3;
455
456 return 0;
457}
458
459static int
460fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
461{
462 int cyl, st0, ret;
463
464 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
465 if (ret) {
466 (void)fdc_err(fdc,
467 "sense intr err reading stat reg 0\n");
468 return ret;
469 }
470
471 if (st0p)
472 *st0p = st0;
473
474 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
475 /*
476 * There doesn't seem to have been an interrupt.
477 */
478 return FD_NOT_VALID;
479 }
480
481 if (fd_in(fdc, &cyl) < 0) {
482 return fdc_err(fdc, "can't get cyl num\n");
483 }
484
485 if (cylp)
486 *cylp = cyl;
487
488 return 0;
489}
490
491
492static int
493fd_read_status(fdc_p fdc, int fdsu)
494{
495 int i, ret;
496
497 for (i = 0; i < 7; i++) {
498 /*
499 * XXX types are poorly chosen. Only bytes can by read
500 * from the hardware, but fdc->status[] wants u_ints and
501 * fd_in() gives ints.
502 */
503 int status;
504
505 ret = fd_in(fdc, &status);
506 fdc->status[i] = status;
507 if (ret != 0)
508 break;
509 }
510
511 if (ret == 0)
512 fdc->flags |= FDC_STAT_VALID;
513 else
514 fdc->flags &= ~FDC_STAT_VALID;
515
516 return ret;
517}
518
519/****************************************************************************/
520/* autoconfiguration stuff */
521/****************************************************************************/
522
8c5c0470 523int
984263bc
MD		 524fdc_alloc_resources(struct fdc_data *fdc)
525{
526 device_t dev;
527 int ispnp, ispcmcia;
528
529 dev = fdc->fdc_dev;
530 ispnp = (fdc->flags & FDC_ISPNP) != 0;
531 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
532 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
533 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
534
535 /*
536 * On standard ISA, we don't just use an 8 port range
537 * (e.g. 0x3f0-0x3f7) since that covers an IDE control
538 * register at 0x3f6.
539 *
540 * Isn't PC hardware wonderful.
541 *
542 * The Y-E Data PCMCIA FDC doesn't have this problem, it
543 * uses the register with offset 6 for pseudo-DMA, and the
544 * one with offset 7 as control register.
545 */
546 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
547 &fdc->rid_ioport, 0ul, ~0ul,
548 ispcmcia ? 8 : (ispnp ? 1 : 6),
549 RF_ACTIVE);
550 if (fdc->res_ioport == 0) {
551 device_printf(dev, "cannot reserve I/O port range\n");
552 return ENXIO;
553 }
554 fdc->portt = rman_get_bustag(fdc->res_ioport);
555 fdc->porth = rman_get_bushandle(fdc->res_ioport);
556
557 if (!ispcmcia) {
558 /*
559 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
560 * and some at 0x3f0-0x3f5,0x3f7. We detect the former
561 * by checking the size and adjust the port address
562 * accordingly.
563 */
564 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
565 fdc->port_off = -2;
566
567 /*
568 * Register the control port range as rid 1 if it
569 * isn't there already. Most PnP BIOSen will have
570 * already done this but non-PnP configurations don't.
571 *
572 * And some (!!) report 0x3f2-0x3f5 and completely
573 * leave out the control register! It seems that some
574 * non-antique controller chips have a different
575 * method of programming the transfer speed which
576 * doesn't require the control register, but it's
577 * mighty bogus as the chip still responds to the
578 * address for the control register.
579 */
580 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
581 u_long ctlstart;
582
583 /* Find the control port, usually 0x3f7 */
584 ctlstart = rman_get_start(fdc->res_ioport) +
585 fdc->port_off + 7;
586
587 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
588 }
589
590 /*
591 * Now (finally!) allocate the control port.
592 */
593 fdc->rid_ctl = 1;
594 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
595 &fdc->rid_ctl,
596 0ul, ~0ul, 1, RF_ACTIVE);
597 if (fdc->res_ctl == 0) {
598 device_printf(dev,
599 "cannot reserve control I/O port range\n");
600 return ENXIO;
601 }
602 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
603 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
604 }
605
606 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
607 &fdc->rid_irq, 0ul, ~0ul, 1,
608 RF_ACTIVE);
609 if (fdc->res_irq == 0) {
610 device_printf(dev, "cannot reserve interrupt line\n");
611 return ENXIO;
612 }
613
614 if ((fdc->flags & FDC_NODMA) == 0) {
615 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
616 &fdc->rid_drq, 0ul, ~0ul, 1,
617 RF_ACTIVE);
618 if (fdc->res_drq == 0) {
619 device_printf(dev, "cannot reserve DMA request line\n");
620 return ENXIO;
621 }
622 fdc->dmachan = fdc->res_drq->r_start;
623 }
624
625 return 0;
626}
627
8c5c0470 628void
984263bc
MD		 629fdc_release_resources(struct fdc_data *fdc)
630{
631 device_t dev;
632
633 dev = fdc->fdc_dev;
634 if (fdc->res_irq != 0) {
635 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
636 fdc->res_irq);
637 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
638 fdc->res_irq);
639 }
640 if (fdc->res_ctl != 0) {
641 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
642 fdc->res_ctl);
643 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
644 fdc->res_ctl);
645 }
646 if (fdc->res_ioport != 0) {
647 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
648 fdc->res_ioport);
649 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
650 fdc->res_ioport);
651 }
652 if (fdc->res_drq != 0) {
653 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
654 fdc->res_drq);
655 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
656 fdc->res_drq);
657 }
658}
659
660/****************************************************************************/
661/* autoconfiguration stuff */
662/****************************************************************************/
663
664static struct isa_pnp_id fdc_ids[] = {
665 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
666 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
667 {0}
668};
669
8c5c0470 670int
984263bc
MD		 671fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
672{
673 struct fdc_ivars *ivars = device_get_ivars(child);
674
675 switch (which) {
676 case FDC_IVAR_FDUNIT:
677 *result = ivars->fdunit;
678 break;
679 default:
680 return ENOENT;
681 }
682 return 0;
683}
684
685/*
686 * fdc controller section.
687 */
688static int
689fdc_probe(device_t dev)
690{
691 int error, ic_type;
692 struct fdc_data *fdc;
693
694 fdc = device_get_softc(dev);
695 bzero(fdc, sizeof *fdc);
696 fdc->fdc_dev = dev;
697 fdc->fdctl_wr = fdctl_wr_isa;
698
699 /* Check pnp ids */
700 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
701 if (error == ENXIO)
702 return ENXIO;
703 if (error == 0)
704 fdc->flags |= FDC_ISPNP;
705
706 /* Attempt to allocate our resources for the duration of the probe */
707 error = fdc_alloc_resources(fdc);
708 if (error)
709 goto out;
710
711 /* First - lets reset the floppy controller */
712 fdout_wr(fdc, 0);
713 DELAY(100);
714 fdout_wr(fdc, FDO_FRST);
715
716 /* see if it can handle a command */
717 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
718 NE7_SPEC_2(2, 0), 0)) {
719 error = ENXIO;
720 goto out;
721 }
722
723 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
724 ic_type = (u_char)ic_type;
725 switch (ic_type) {
726 case 0x80:
727 device_set_desc(dev, "NEC 765 or clone");
728 fdc->fdct = FDC_NE765;
729 break;
730 case 0x81:
731 device_set_desc(dev, "Intel 82077 or clone");
732 fdc->fdct = FDC_I82077;
733 break;
734 case 0x90:
735 device_set_desc(dev, "NEC 72065B or clone");
736 fdc->fdct = FDC_NE72065;
737 break;
738 default:
739 device_set_desc(dev, "generic floppy controller");
740 fdc->fdct = FDC_UNKNOWN;
741 break;
742 }
743 }
744
745out:
746 fdc_release_resources(fdc);
747 return (error);
748}
749
984263bc
MD		 750/*
751 * Add a child device to the fdc controller. It will then be probed etc.
752 */
753static void
754fdc_add_child(device_t dev, const char *name, int unit)
755{
756 int disabled;
757 struct fdc_ivars *ivar;
758 device_t child;
759
efda3bd0 760 ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
984263bc
MD		 761 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
762 ivar->fdunit = 0;
763 child = device_add_child(dev, name, unit);
764 if (child == NULL)
765 return;
766 device_set_ivars(child, ivar);
767 if (resource_int_value(name, unit, "disabled", &disabled) == 0
768 && disabled != 0)
769 device_disable(child);
770}
771
8c5c0470 772int
984263bc
MD		 773fdc_attach(device_t dev)
774{
775 struct fdc_data *fdc;
776 int i, error;
777
778 fdc = device_get_softc(dev);
8b97cf2a
JS		 779
780 callout_init(&fdc->pseudointr_ch);
781
984263bc
MD		 782 error = fdc_alloc_resources(fdc);
783 if (error) {
0ca0cd25 784 device_printf(dev, "cannot reacquire resources\n");
984263bc
MD		 785 return error;
786 }
787 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
ee61f228 788 0, fdc_intr, fdc,
e9cb6d99 789 &fdc->fdc_intr, NULL);
984263bc
MD		 790 if (error) {
791 device_printf(dev, "cannot setup interrupt\n");
792 return error;
793 }
794 fdc->fdcu = device_get_unit(dev);
795 fdc->flags |= FDC_ATTACHED;
796
797 if ((fdc->flags & FDC_NODMA) == 0) {
798 /* Acquire the DMA channel forever, The driver will do the rest */
799 /* XXX should integrate with rman */
800 isa_dma_acquire(fdc->dmachan);
801 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
802 }
803 fdc->state = DEVIDLE;
804
805 /* reset controller, turn motor off, clear fdout mirror reg */
806 fdout_wr(fdc, ((fdc->fdout = 0)));
81b5c339 807 bioq_init(&fdc->bio_queue);
984263bc
MD		 808
809 /*
810 * Probe and attach any children. We should probably detect
811 * devices from the BIOS unless overridden.
812 */
813 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
814 i != -1;
815 i = resource_query_string(i, "at", device_get_nameunit(dev)))
816 fdc_add_child(dev, resource_query_name(i),
817 resource_query_unit(i));
818
819 return (bus_generic_attach(dev));
820}
821
8c5c0470 822int
984263bc
MD		 823fdc_print_child(device_t me, device_t child)
824{
825 int retval = 0;
826
827 retval += bus_print_child_header(me, child);
e3869ec7 828 retval += kprintf(" on %s drive %d\n", device_get_nameunit(me),
984263bc
MD		 829 fdc_get_fdunit(child));
830
831 return (retval);
832}
833
834static device_method_t fdc_methods[] = {
835 /* Device interface */
836 DEVMETHOD(device_probe, fdc_probe),
837 DEVMETHOD(device_attach, fdc_attach),
838 DEVMETHOD(device_detach, bus_generic_detach),
839 DEVMETHOD(device_shutdown, bus_generic_shutdown),
840 DEVMETHOD(device_suspend, bus_generic_suspend),
841 DEVMETHOD(device_resume, bus_generic_resume),
842
843 /* Bus interface */
844 DEVMETHOD(bus_print_child, fdc_print_child),
845 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
846 /* Our children never use any other bus interface methods. */
847
848 { 0, 0 }
849};
850
851static driver_t fdc_driver = {
852 "fdc",
853 fdc_methods,
854 sizeof(struct fdc_data)
855};
856
857DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
c8b4f0e6 858DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, 0, 0);
984263bc 859
984263bc
MD		 860/******************************************************************/
861/*
862 * devices attached to the controller section.
863 */
864static int
865fd_probe(device_t dev)
866{
867 int i;
868 u_int fdt, st0, st3;
869 struct fd_data *fd;
870 struct fdc_data *fdc;
871 fdsu_t fdsu;
872 static int fd_fifo = 0;
873
874 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
875 fd = device_get_softc(dev);
876 fdc = device_get_softc(device_get_parent(dev));
877
878 bzero(fd, sizeof *fd);
879 fd->dev = dev;
880 fd->fdc = fdc;
881 fd->fdsu = fdsu;
882 fd->fdu = device_get_unit(dev);
883
884#ifdef __i386__
885 /* look up what bios thinks we have */
886 switch (fd->fdu) {
887 case 0:
888 if ((fdc->flags & FDC_ISPCMCIA))
889 fdt = RTCFDT_144M;
890 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
891 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
892 else
893 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
894 break;
895 case 1:
896 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
897 break;
898 default:
899 fdt = RTCFDT_NONE;
900 break;
901 }
902#else
903 fdt = RTCFDT_144M; /* XXX probably */
904#endif
905
906 /* is there a unit? */
907 if (fdt == RTCFDT_NONE)
908 return (ENXIO);
909
910 /* select it */
911 set_motor(fdc, fdsu, TURNON);
912 DELAY(1000000); /* 1 sec */
913
914 /* XXX This doesn't work before the first set_motor() */
915 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
916 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
917 && enable_fifo(fdc) == 0) {
918 device_printf(device_get_parent(dev),
919 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
920 }
921 fd_fifo = 1;
922
923 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
924 && (st3 & NE7_ST3_T0)) {
925 /* if at track 0, first seek inwards */
926 /* seek some steps: */
927 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
928 DELAY(300000); /* ...wait a moment... */
929 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
930 }
931
932 /* If we're at track 0 first seek inwards. */
933 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
934 /* Seek some steps... */
935 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
936 /* ...wait a moment... */
937 DELAY(300000);
938 /* make ctrlr happy: */
939 fd_sense_int(fdc, 0, 0);
940 }
941 }
942
943 for (i = 0; i < 2; i++) {
944 /*
945 * we must recalibrate twice, just in case the
946 * heads have been beyond cylinder 76, since most
947 * FDCs still barf when attempting to recalibrate
948 * more than 77 steps
949 */
950 /* go back to 0: */
951 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
952 /* a second being enough for full stroke seek*/
953 DELAY(i == 0 ? 1000000 : 300000);
954
955 /* anything responding? */
956 if (fd_sense_int(fdc, &st0, 0) == 0 &&
957 (st0 & NE7_ST0_EC) == 0)
958 break; /* already probed succesfully */
959 }
960 }
961
962 set_motor(fdc, fdsu, TURNOFF);
963
964 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
965 return (ENXIO);
966
967 fd->track = FD_NO_TRACK;
968 fd->fdc = fdc;
969 fd->fdsu = fdsu;
970 fd->options = 0;
e8b273ff
MD		 971 callout_init(&fd->toffhandle);
972 callout_init(&fd->tohandle);
4fc46503 973 callout_init(&fd->motor);
984263bc
MD		 974
975 switch (fdt) {
976 case RTCFDT_12M:
977 device_set_desc(dev, "1200-KB 5.25\" drive");
978 fd->type = FD_1200;
979 break;
980 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
981 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
984263bc 982 fd->type = FD_1440;
c755a6ff 983 break;
984263bc
MD		 984 case RTCFDT_144M:
985 device_set_desc(dev, "1440-KB 3.5\" drive");
986 fd->type = FD_1440;
987 break;
988 case RTCFDT_288M:
989 case RTCFDT_288M_1:
990 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
991 fd->type = FD_1440;
992 break;
993 case RTCFDT_360K:
994 device_set_desc(dev, "360-KB 5.25\" drive");
995 fd->type = FD_360;
996 break;
997 case RTCFDT_720K:
e3869ec7 998 kprintf("720-KB 3.5\" drive");
984263bc
MD		 999 fd->type = FD_720;
1000 break;
1001 default:
1002 return (ENXIO);
1003 }
983105c1 1004 fd->ft = fd_types[fd->type - 1];
984263bc
MD		 1005 return (0);
1006}
1007
1008static int
1009fd_attach(device_t dev)
1010{
1011 struct fd_data *fd;
984263bc
MD		 1012
1013 fd = device_get_softc(dev);
1014
983105c1 1015 disk_create(fd->fdu, &fd->disk, &fd_ops);
984263bc
MD		 1016
1017 /*
983105c1
MD		 1018 * Make special raw floppy devices with preset types to
1019 * make formatting easier. These override the disk management
1020 * layer for the whole-slice-disk for partitions 128-191. Note
1021 * that we do not override partition 255, which is the
1022 * whole-slice-part. If we did we would have to provide our
1023 * own DIOCGPART ioctl.
984263bc 1024 */
983105c1
MD		 1025 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 1),
1026 UID_ROOT, GID_WHEEL, 0600, "fd%d.1720", fd->fdu);
1027 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 2),
1028 UID_ROOT, GID_WHEEL, 0600, "fd%d.1480", fd->fdu);
1029 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 3),
1030 UID_ROOT, GID_WHEEL, 0600, "fd%d.1440", fd->fdu);
1031 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 4),
1032 UID_ROOT, GID_WHEEL, 0600, "fd%d.1200", fd->fdu);
1033 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 5),
1034 UID_ROOT, GID_WHEEL, 0600, "fd%d.820", fd->fdu);
1035 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 6),
1036 UID_ROOT, GID_WHEEL, 0600, "fd%d.800", fd->fdu);
1037 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 7),
1038 UID_ROOT, GID_WHEEL, 0600, "fd%d.720", fd->fdu);
1039 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 8),
1040 UID_ROOT, GID_WHEEL, 0600, "fd%d.360", fd->fdu);
1041 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 9),
1042 UID_ROOT, GID_WHEEL, 0600, "fd%d.640", fd->fdu);
1043 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 10),
1044 UID_ROOT, GID_WHEEL, 0600, "fd%d.1232", fd->fdu);
1045
984263bc
MD		 1046 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1047 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1048 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1049 DEVSTAT_PRIORITY_FD);
1050 return (0);
1051}
1052
1053static int
1054fd_detach(device_t dev)
1055{
1056 struct fd_data *fd;
1057
1058 fd = device_get_softc(dev);
cd29885a
MD		 1059 kprintf("devfs: Please make sure that only the right fd device was removed!!!\n");
1060 dev_ops_remove_minor(&fd_ops,
1061 /*dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),*/
983105c1
MD		 1062 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128));
1063 disk_invalidate(&fd->disk);
1064 disk_destroy(&fd->disk);
1065 devstat_remove_entry(&fd->device_stats);
e8b273ff 1066 callout_stop(&fd->toffhandle);
4fc46503 1067 callout_stop(&fd->motor);
984263bc
MD		 1068
1069 return (0);
1070}
1071
1072static device_method_t fd_methods[] = {
1073 /* Device interface */
1074 DEVMETHOD(device_probe, fd_probe),
1075 DEVMETHOD(device_attach, fd_attach),
1076 DEVMETHOD(device_detach, fd_detach),
1077 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1078 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1079 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1080
1081 { 0, 0 }
1082};
1083
1084static driver_t fd_driver = {
1085 "fd",
1086 fd_methods,
1087 sizeof(struct fd_data)
1088};
1089
1090DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1091
1092/****************************************************************************/
1093/* motor control stuff */
1094/* remember to not deselect the drive we're working on */
1095/****************************************************************************/
1096static void
1097set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1098{
1099 int fdout = fdc->fdout;
1100 int needspecify = 0;
1101
1102 if(turnon) {
1103 fdout &= ~FDO_FDSEL;
1104 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1105 } else
1106 fdout &= ~(FDO_MOEN0 << fdsu);
1107
1108 if(!turnon
1109 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1110 /* gonna turn off the last drive, put FDC to bed */
1111 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1112 else {
1113 /* make sure controller is selected and specified */
1114 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1115 needspecify = 1;
1116 fdout |= (FDO_FRST|FDO_FDMAEN);
1117 }
1118
1119 fdout_wr(fdc, fdout);
1120 fdc->fdout = fdout;
1121 TRACE1("[0x%x->FDOUT]", fdout);
1122
1123 if (needspecify) {
1124 /*
1125 * XXX
1126 * special case: since we have just woken up the FDC
1127 * from its sleep, we silently assume the command will
1128 * be accepted, and do not test for a timeout
1129 */
1130 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1131 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1132 0);
1133 if (fdc->flags & FDC_HAS_FIFO)
1134 (void) enable_fifo(fdc);
1135 }
1136}
1137
1138static void
1139fd_turnoff(void *xfd)
1140{
984263bc
MD		 1141 fd_p fd = xfd;
1142
1143 TRACE1("[fd%d: turnoff]", fd->fdu);
1144
fbe276c7 1145 crit_enter();
984263bc
MD		 1146 /*
1147 * Don't turn off the motor yet if the drive is active.
1148 *
1149 * If we got here, this could only mean we missed an interrupt.
1150 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1151 * after a controller reset. Just schedule a pseudo-interrupt
1152 * so the state machine gets re-entered.
1153 */
1154 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1155 fdc_intr(fd->fdc);
fbe276c7 1156 crit_exit();
984263bc
MD		 1157 return;
1158 }
1159
1160 fd->flags &= ~FD_MOTOR;
1161 set_motor(fd->fdc, fd->fdsu, TURNOFF);
fbe276c7 1162 crit_exit();
984263bc
MD		 1163}
1164
1165static void
1166fd_motor_on(void *xfd)
1167{
984263bc
MD		 1168 fd_p fd = xfd;
1169
fbe276c7 1170 crit_enter();
984263bc
MD		 1171 fd->flags &= ~FD_MOTOR_WAIT;
1172 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1173 {
1174 fdc_intr(fd->fdc);
1175 }
fbe276c7 1176 crit_exit();
984263bc
MD		 1177}
1178
1179static void
1180fd_turnon(fd_p fd)
1181{
1182 if(!(fd->flags & FD_MOTOR))
1183 {
1184 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1185 set_motor(fd->fdc, fd->fdsu, TURNON);
4fc46503 1186 callout_reset(&fd->motor, hz, fd_motor_on, fd);
984263bc
MD		 1187 }
1188}
1189
1190static void
1191fdc_reset(fdc_p fdc)
1192{
1193 /* Try a reset, keep motor on */
1194 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1195 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1196 DELAY(100);
1197 /* enable FDC, but defer interrupts a moment */
1198 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1199 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1200 DELAY(100);
1201 fdout_wr(fdc, fdc->fdout);
1202 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1203
1204 /* XXX after a reset, silently believe the FDC will accept commands */
1205 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1206 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1207 0);
1208 if (fdc->flags & FDC_HAS_FIFO)
1209 (void) enable_fifo(fdc);
1210}
1211
1212/****************************************************************************/
1213/* fdc in/out */
1214/****************************************************************************/
1215/*
1216 * FDC IO functions, take care of the main status register, timeout
1217 * in case the desired status bits are never set.
1218 *
1219 * These PIO loops initially start out with short delays between
1220 * each iteration in the expectation that the required condition
1221 * is usually met quickly, so it can be handled immediately. After
1222 * about 1 ms, stepping is increased to achieve a better timing
1223 * accuracy in the calls to DELAY().
1224 */
1225static int
1226fd_in(struct fdc_data *fdc, int *ptr)
1227{
1228 int i, j, step;
1229
1230 for (j = 0, step = 1;
1231 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1232 j < FDSTS_TIMEOUT;
1233 j += step) {
1234 if (i == NE7_RQM)
1235 return (fdc_err(fdc, "ready for output in input\n"));
1236 if (j == 1000)
1237 step = 1000;
1238 DELAY(step);
1239 }
1240 if (j >= FDSTS_TIMEOUT)
1241 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1242#ifdef FDC_DEBUG
1243 i = fddata_rd(fdc);
1244 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1245 *ptr = i;
1246 return (0);
1247#else /* !FDC_DEBUG */
1248 i = fddata_rd(fdc);
1249 if (ptr)
1250 *ptr = i;
1251 return (0);
1252#endif /* FDC_DEBUG */
1253}
1254
1255static int
1256out_fdc(struct fdc_data *fdc, int x)
1257{
1258 int i, j, step;
1259
1260 for (j = 0, step = 1;
1261 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1262 j < FDSTS_TIMEOUT;
1263 j += step) {
1264 if (i == (NE7_DIO|NE7_RQM))
1265 return (fdc_err(fdc, "ready for input in output\n"));
1266 if (j == 1000)
1267 step = 1000;
1268 DELAY(step);
1269 }
1270 if (j >= FDSTS_TIMEOUT)
1271 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1272
1273 /* Send the command and return */
1274 fddata_wr(fdc, x);
1275 TRACE1("[0x%x->FDDATA]", x);
1276 return (0);
1277}
1278
1279/****************************************************************************/
1280/* fdopen/fdclose */
1281/****************************************************************************/
1282int
fef8985e 1283Fdopen(struct dev_open_args *ap)
984263bc 1284{
b13267a5 1285 cdev_t dev = ap->a_head.a_dev;
983105c1
MD		 1286 fdu_t fdu = dkunit(dev);
1287 struct disk_info info;
1288 struct fd_type *ft;
1289 int type;
1290 int changetype;
984263bc
MD		 1291 fd_p fd;
1292 fdc_p fdc;
1293
1294 /* check bounds */
1295 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1296 return (ENXIO);
1297 fdc = fd->fdc;
1298 if ((fdc == NULL) || (fd->type == NO_TYPE))
1299 return (ENXIO);
983105c1
MD		 1300
1301 /*
1302 * Figure out the type of floppy. There are special whole-disk-device
1303 * overrides that will override the current type.
1304 */
1305 type = dkpart(dev);
1306 if (type == WHOLE_SLICE_PART) {
1307 type = fd->type; /* do not change selected type data */
1308 changetype = 0;
1309 } else if (type > 128) {
1310 type -= 128; /* set to specific format */
1311 changetype = 1;
1312 } else {
1313 type = fd->type; /* reset to default */
1314 changetype = 1;
1315 }
984263bc
MD		 1316 if (type > NUMDENS)
1317 return (ENXIO);
983105c1 1318 if (type != fd->type) {
984263bc
MD		 1319 /*
1320 * For each type of basic drive, make sure we are trying
1321 * to open a type it can do,
1322 */
983105c1
MD		 1323 switch (fd->type) {
1324 case FD_360:
1325 return (ENXIO);
1326 case FD_720:
1327 if ( type != FD_820
1328 && type != FD_800
1329 && type != FD_640
1330 )
984263bc 1331 return (ENXIO);
983105c1
MD		 1332 break;
1333 case FD_1200:
1334 switch (type) {
1335 case FD_1480:
1336 type = FD_1480in5_25;
1337 break;
1338 case FD_1440:
1339 type = FD_1440in5_25;
1340 break;
1341 case FD_1232:
1342 break;
1343 case FD_820:
1344 type = FD_820in5_25;
1345 break;
1346 case FD_800:
1347 type = FD_800in5_25;
1348 break;
984263bc 1349 case FD_720:
983105c1 1350 type = FD_720in5_25;
984263bc 1351 break;
983105c1
MD		 1352 case FD_640:
1353 type = FD_640in5_25;
984263bc 1354 break;
983105c1
MD		 1355 case FD_360:
1356 type = FD_360in5_25;
984263bc 1357 break;
983105c1
MD		 1358 default:
1359 return(ENXIO);
984263bc 1360 }
983105c1
MD		 1361 break;
1362 case FD_1440:
1363 if ( type != FD_1720
1364 && type != FD_1480
1365 && type != FD_1200
1366 && type != FD_820
1367 && type != FD_800
1368 && type != FD_720
1369 && type != FD_640
1370 )
1371 return(ENXIO);
1372 break;
984263bc
MD		 1373 }
1374 }
983105c1
MD		 1375
1376 /*
1377 * fd->type is the basic drive type, not the current format
1378 * we are reading. We only change the type when opening the
1379 * whole-slice-partition
1380 */
1381 if (changetype)
1382 fd->ft = fd_types[type - 1];
984263bc 1383 fd->flags |= FD_OPEN;
983105c1 1384
984263bc
MD		 1385 /*
1386 * Clearing the DMA overrun counter at open time is a bit messy.
1387 * Since we're only managing one counter per controller, opening
1388 * the second drive could mess it up. Anyway, if the DMA overrun
1389 * condition is really persistent, it will eventually time out
1390 * still. OTOH, clearing it here will ensure we'll at least start
1391 * trying again after a previous (maybe even long ago) failure.
1392 * Also, this is merely a stop-gap measure only that should not
1393 * happen during normal operation, so we can tolerate it to be a
1394 * bit sloppy about this.
1395 */
1396 fdc->dma_overruns = 0;
1397
983105c1
MD		 1398 /*
1399 * Set disk parameters for the disk management layer.
1400 *
1401 * Note that we do not set RAWEXTENSIONS here. We override
1402 * the minor numbers in the raw-extension range and handle them
1403 * directly.
1404 */
1405 bzero(&info, sizeof(info));
1406 ft = &fd->ft;
1407 info.d_media_blksize = 128 << ft->secsize;
1408 info.d_media_blocks = ft->size;
1409 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1410 info.d_nheads = ft->heads;
1411 info.d_secpertrack = ft->sectrac;
1412 info.d_secpercyl = ft->sectrac * ft->heads;
1413 info.d_ncylinders = ft->size / info.d_secpercyl;
1414 disk_setdiskinfo(&fd->disk, &info);
1415
984263bc
MD		 1416 return 0;
1417}
1418
1419int
fef8985e 1420fdclose(struct dev_close_args *ap)
984263bc 1421{
b13267a5 1422 cdev_t dev = ap->a_head.a_dev;
983105c1 1423 fdu_t fdu = dkunit(dev);
984263bc
MD		 1424 struct fd_data *fd;
1425
1426 fd = devclass_get_softc(fd_devclass, fdu);
1427 fd->flags &= ~FD_OPEN;
1428 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1429
1430 return (0);
1431}
1432
1433/****************************************************************************/
1434/* fdstrategy */
1435/****************************************************************************/
fef8985e
MD		 1436int
1437fdstrategy(struct dev_strategy_args *ap)
984263bc 1438{
b13267a5 1439 cdev_t dev = ap->a_head.a_dev;
fef8985e 1440 struct bio *bio = ap->a_bio;
81b5c339 1441 struct buf *bp = bio->bio_buf;
984263bc 1442 unsigned nblocks, blknum, cando;
984263bc
MD		 1443 fdu_t fdu;
1444 fdc_p fdc;
1445 fd_p fd;
1446 size_t fdblk;
1447
983105c1 1448 fdu = dkunit(dev);
984263bc
MD		 1449 fd = devclass_get_softc(fd_devclass, fdu);
1450 if (fd == 0)
1451 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
81b5c339 1452 (u_long)major(dev), (u_long)minor(dev));
984263bc
MD		 1453 fdc = fd->fdc;
1454 if (fd->type == NO_TYPE) {
1455 bp->b_error = ENXIO;
1456 bp->b_flags |= B_ERROR;
1457 goto bad;
1458 };
1459
983105c1 1460 fdblk = 128 << (fd->ft.secsize);
10f3fee5 1461 if (bp->b_cmd != BUF_CMD_FORMAT) {
54078292 1462 if (bio->bio_offset < 0) {
e3869ec7 1463 kprintf(
54078292
MD		 1464 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n",
1465 fdu, bio->bio_offset, bp->b_bcount);
984263bc
MD		 1466 bp->b_error = EINVAL;
1467 bp->b_flags |= B_ERROR;
1468 goto bad;
1469 }
1470 if ((bp->b_bcount % fdblk) != 0) {
1471 bp->b_error = EINVAL;
1472 bp->b_flags |= B_ERROR;
1473 goto bad;
1474 }
1475 }
1476
1477 /*
1478 * Set up block calculations.
1479 */
54078292 1480 if (bio->bio_offset > 20000000LL * fdblk) {
984263bc
MD		 1481 /*
1482 * Reject unreasonably high block number, prevent the
1483 * multiplication below from overflowing.
1484 */
1485 bp->b_error = EINVAL;
1486 bp->b_flags |= B_ERROR;
1487 goto bad;
1488 }
54078292 1489 blknum = (unsigned)(bio->bio_offset / fdblk);
983105c1 1490 nblocks = fd->ft.size;
984263bc
MD		 1491 bp->b_resid = 0;
1492 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1493 if (blknum <= nblocks) {
1494 cando = (nblocks - blknum) * fdblk;
1495 bp->b_resid = bp->b_bcount - cando;
1496 if (cando == 0)
1497 goto bad; /* not actually bad but EOF */
1498 } else {
1499 bp->b_error = EINVAL;
1500 bp->b_flags |= B_ERROR;
1501 goto bad;
1502 }
1503 }
fbe276c7 1504 crit_enter();
81b5c339
MD		 1505 bio->bio_driver_info = dev;
1506 bioqdisksort(&fdc->bio_queue, bio);
e8b273ff 1507 callout_stop(&fd->toffhandle);
984263bc
MD		 1508
1509 /* Tell devstat we are starting on the transaction */
1510 devstat_start_transaction(&fd->device_stats);
1511 device_busy(fd->dev);
1512
1513 fdstart(fdc);
fbe276c7 1514 crit_exit();
fef8985e 1515 return(0);
984263bc
MD		 1516
1517bad:
81b5c339 1518 biodone(bio);
fef8985e 1519 return(0);
984263bc
MD		 1520}
1521
1522/***************************************************************\
1523* fdstart *
1524* We have just queued something.. if the controller is not busy *
1525* then simulate the case where it has just finished a command *
1526* So that it (the interrupt routine) looks on the queue for more*
1527* work to do and picks up what we just added. *
1528* If the controller is already busy, we need do nothing, as it *
1529* will pick up our work when the present work completes *
1530\***************************************************************/
1531static void
1532fdstart(struct fdc_data *fdc)
1533{
fbe276c7 1534 crit_enter();
984263bc
MD		 1535 if(fdc->state == DEVIDLE)
1536 {
1537 fdc_intr(fdc);
1538 }
fbe276c7 1539 crit_exit();
984263bc
MD		 1540}
1541
1542static void
1543fd_iotimeout(void *xfdc)
1544{
1545 fdc_p fdc;
984263bc
MD		 1546
1547 fdc = xfdc;
1548 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1549
1550 /*
1551 * Due to IBM's brain-dead design, the FDC has a faked ready
1552 * signal, hardwired to ready == true. Thus, any command
1553 * issued if there's no diskette in the drive will _never_
1554 * complete, and must be aborted by resetting the FDC.
1555 * Many thanks, Big Blue!
1556 * The FDC must not be reset directly, since that would
1557 * interfere with the state machine. Instead, pretend that
1558 * the command completed but was invalid. The state machine
1559 * will reset the FDC and retry once.
1560 */
fbe276c7 1561 crit_enter();
984263bc
MD		 1562 fdc->status[0] = NE7_ST0_IC_IV;
1563 fdc->flags &= ~FDC_STAT_VALID;
1564 fdc->state = IOTIMEDOUT;
1565 fdc_intr(fdc);
fbe276c7 1566 crit_exit();
984263bc
MD		 1567}
1568
fbe276c7 1569/* just ensure it is running in a critical section */
984263bc
MD		 1570static void
1571fd_pseudointr(void *xfdc)
1572{
fbe276c7 1573 crit_enter();
984263bc 1574 fdc_intr(xfdc);
fbe276c7 1575 crit_exit();
984263bc
MD		 1576}
1577
1578/***********************************************************************\
1579* fdintr *
1580* keep calling the state machine until it returns a 0 *
1581* ALWAYS called at SPLBIO *
1582\***********************************************************************/
1583static void
1584fdc_intr(void *xfdc)
1585{
1586 fdc_p fdc = xfdc;
1587 while(fdstate(fdc))
1588 ;
1589}
1590
1591/*
1592 * magic pseudo-DMA initialization for YE FDC. Sets count and
1593 * direction
1594 */
1595#define SET_BCDR(fdc,wr,cnt,port) \
1596 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1597 ((cnt)-1) & 0xff); \
1598 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1599 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1600
1601/*
1602 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1603 */
10f3fee5 1604static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
984263bc
MD		 1605{
1606 u_char *cptr = (u_char *)addr;
1607
10f3fee5 1608 if (cmd == BUF_CMD_READ) {
984263bc
MD		 1609 if (fdc->state != PIOREAD) {
1610 fdc->state = PIOREAD;
1611 return(0);
1612 };
1613 SET_BCDR(fdc, 0, count, 0);
1614 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1615 FDC_YE_DATAPORT, cptr, count);
1616 } else {
1617 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1618 FDC_YE_DATAPORT, cptr, count);
1619 SET_BCDR(fdc, 0, count, 0);
1620 };
1621 return(1);
1622}
1623
1624/***********************************************************************\
1625* The controller state machine. *
1626* if it returns a non zero value, it should be called again immediatly *
1627\***********************************************************************/
1628static int
1629fdstate(fdc_p fdc)
1630{
1631 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1632 unsigned blknum = 0, b_cylinder = 0;
c755a6ff 1633 fdu_t fdu;
984263bc 1634 fd_p fd;
81b5c339 1635 struct bio *bio;
3a1b0fdc 1636 struct buf *bp;
984263bc
MD		 1637 struct fd_formb *finfo = NULL;
1638 size_t fdblk;
b13267a5 1639 cdev_t dev;
81b5c339
MD		 1640
1641 bio = fdc->bio;
1642 if (bio == NULL) {
1643 bio = bioq_first(&fdc->bio_queue);
1644 if (bio != NULL) {
1645 bioq_remove(&fdc->bio_queue, bio);
1646 fdc->bio = bio;
984263bc
MD		 1647 }
1648 }
81b5c339 1649 if (bio == NULL) {
984263bc
MD		 1650 /***********************************************\
1651 * nothing left for this controller to do *
1652 * Force into the IDLE state, *
1653 \***********************************************/
1654 fdc->state = DEVIDLE;
1655 if (fdc->fd) {
1656 device_printf(fdc->fdc_dev,
1657 "unexpected valid fd pointer\n");
1658 fdc->fd = (fd_p) 0;
1659 fdc->fdu = -1;
1660 }
1661 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1662 return (0);
1663 }
81b5c339
MD		 1664 bp = bio->bio_buf;
1665 dev = bio->bio_driver_info;
1666
983105c1 1667 fdu = dkunit(dev);
984263bc 1668 fd = devclass_get_softc(fd_devclass, fdu);
983105c1 1669 fdblk = 128 << fd->ft.secsize;
984263bc
MD		 1670 if (fdc->fd && (fd != fdc->fd))
1671 device_printf(fd->dev, "confused fd pointers\n");
10f3fee5
MD		 1672 read = (bp->b_cmd == BUF_CMD_READ);
1673 format = (bp->b_cmd == BUF_CMD_FORMAT);
984263bc
MD		 1674 if (format) {
1675 finfo = (struct fd_formb *)bp->b_data;
1676 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1677 - (char *)finfo;
1678 }
1679 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
54078292
MD		 1680 blknum = (unsigned)(bio->bio_offset / fdblk) +
1681 fd->skip /fdblk;
983105c1 1682 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads);
984263bc
MD		 1683 }
1684 TRACE1("fd%d", fdu);
1685 TRACE1("[%s]", fdstates[fdc->state]);
1686 TRACE1("(0x%x)", fd->flags);
e8b273ff 1687 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
984263bc
MD		 1688 switch (fdc->state)
1689 {
1690 case DEVIDLE:
1691 case FINDWORK: /* we have found new work */
1692 fdc->retry = 0;
1693 fd->skip = 0;
1694 fdc->fd = fd;
1695 fdc->fdu = fdu;
983105c1
MD		 1696 fdc->fdctl_wr(fdc, fd->ft.trans);
1697 TRACE1("[0x%x->FDCTL]", fd->ft.trans);
984263bc
MD		 1698 /*******************************************************\
1699 * If the next drive has a motor startup pending, then *
1700 * it will start up in its own good time *
1701 \*******************************************************/
1702 if(fd->flags & FD_MOTOR_WAIT) {
1703 fdc->state = MOTORWAIT;
1704 return (0); /* come back later */
1705 }
1706 /*******************************************************\
1707 * Maybe if it's not starting, it SHOULD be starting *
1708 \*******************************************************/
1709 if (!(fd->flags & FD_MOTOR))
1710 {
1711 fdc->state = MOTORWAIT;
1712 fd_turnon(fd);
1713 return (0);
1714 }
1715 else /* at least make sure we are selected */
1716 {
1717 set_motor(fdc, fd->fdsu, TURNON);
1718 }
1719 if (fdc->flags & FDC_NEEDS_RESET) {
1720 fdc->state = RESETCTLR;
1721 fdc->flags &= ~FDC_NEEDS_RESET;
1722 } else
1723 fdc->state = DOSEEK;
1724 break;
1725 case DOSEEK:
1726 if (b_cylinder == (unsigned)fd->track)
1727 {
1728 fdc->state = SEEKCOMPLETE;
1729 break;
1730 }
1731 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
983105c1 1732 fd->fdsu, b_cylinder * fd->ft.steptrac,
984263bc
MD		 1733 0))
1734 {
1735 /*
1736 * seek command not accepted, looks like
1737 * the FDC went off to the Saints...
1738 */
1739 fdc->retry = 6; /* try a reset */
1740 return(retrier(fdc));
1741 }
1742 fd->track = FD_NO_TRACK;
1743 fdc->state = SEEKWAIT;
1744 return(0); /* will return later */
1745 case SEEKWAIT:
1746 /* allow heads to settle */
4fc46503
JS		 1747 callout_reset(&fdc->pseudointr_ch, hz / 16,
1748 fd_pseudointr, fdc);
984263bc
MD		 1749 fdc->state = SEEKCOMPLETE;
1750 return(0); /* will return later */
1751 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1752 /* Make sure seek really happened*/
1753 if(fd->track == FD_NO_TRACK) {
983105c1 1754 int descyl = b_cylinder * fd->ft.steptrac;
984263bc
MD		 1755 do {
1756 /*
1757 * This might be a "ready changed" interrupt,
1758 * which cannot really happen since the
1759 * RDY pin is hardwired to + 5 volts. This
1760 * generally indicates a "bouncing" intr
1761 * line, so do one of the following:
1762 *
1763 * When running on an enhanced FDC that is
1764 * known to not go stuck after responding
1765 * with INVALID, fetch all interrupt states
1766 * until seeing either an INVALID or a
1767 * real interrupt condition.
1768 *
1769 * When running on a dumb old NE765, give
1770 * up immediately. The controller will
1771 * provide up to four dummy RC interrupt
1772 * conditions right after reset (for the
1773 * corresponding four drives), so this is
1774 * our only chance to get notice that it
1775 * was not the FDC that caused the interrupt.
1776 */
1777 if (fd_sense_int(fdc, &st0, &cyl)
1778 == FD_NOT_VALID)
1779 return 0;
1780 if(fdc->fdct == FDC_NE765
1781 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1782 return 0; /* hope for a real intr */
1783 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1784
1785 if (0 == descyl) {
1786 int failed = 0;
1787 /*
1788 * seek to cyl 0 requested; make sure we are
1789 * really there
1790 */
1791 if (fd_sense_drive_status(fdc, &st3))
1792 failed = 1;
1793 if ((st3 & NE7_ST3_T0) == 0) {
e3869ec7 1794 kprintf(
984263bc
MD		 1795 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1796 fdu, st3, NE7_ST3BITS);
1797 failed = 1;
1798 }
1799
1800 if (failed) {
1801 if(fdc->retry < 3)
1802 fdc->retry = 3;
1803 return (retrier(fdc));
1804 }
1805 }
1806
1807 if (cyl != descyl) {
e3869ec7 1808 kprintf(
984263bc
MD		 1809 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1810 fdu, descyl, cyl, st0);
1811 if (fdc->retry < 3)
1812 fdc->retry = 3;
1813 return (retrier(fdc));
1814 }
1815 }
1816
1817 fd->track = b_cylinder;
10f3fee5
MD		 1818 if (!(fdc->flags & FDC_NODMA)) {
1819 isa_dmastart(isa_dmabp(bp),
1820 bp->b_data+fd->skip,
984263bc 1821 format ? bp->b_bcount : fdblk, fdc->dmachan);
10f3fee5 1822 }
983105c1
MD		 1823 sectrac = fd->ft.sectrac;
1824 sec = blknum % (sectrac * fd->ft.heads);
984263bc
MD		 1825 head = sec / sectrac;
1826 sec = sec % sectrac + 1;
1827 fd->hddrv = ((head&1)<<2)+fdu;
1828
1829 if(format || !read)
1830 {
1831 /* make sure the drive is writable */
1832 if(fd_sense_drive_status(fdc, &st3) != 0)
1833 {
1834 /* stuck controller? */
1835 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1836 isa_dmadone(isa_dmabp(bp),
984263bc
MD		 1837 bp->b_data + fd->skip,
1838 format ? bp->b_bcount : fdblk,
1839 fdc->dmachan);
1840 fdc->retry = 6; /* reset the beast */
1841 return (retrier(fdc));
1842 }
1843 if(st3 & NE7_ST3_WP)
1844 {
1845 /*
1846 * XXX YES! this is ugly.
1847 * in order to force the current operation
1848 * to fail, we will have to fake an FDC
1849 * error - all error handling is done
1850 * by the retrier()
1851 */
1852 fdc->status[0] = NE7_ST0_IC_AT;
1853 fdc->status[1] = NE7_ST1_NW;
1854 fdc->status[2] = 0;
1855 fdc->status[3] = fd->track;
1856 fdc->status[4] = head;
1857 fdc->status[5] = sec;
1858 fdc->retry = 8; /* break out immediately */
1859 fdc->state = IOTIMEDOUT; /* not really... */
1860 return (1);
1861 }
1862 }
1863
1864 if (format) {
1865 if (fdc->flags & FDC_NODMA) {
1866 /*
1867 * This seems to be necessary for
1868 * whatever obscure reason; if we omit
1869 * it, we end up filling the sector ID
1870 * fields of the newly formatted track
1871 * entirely with garbage, causing
1872 * `wrong cylinder' errors all over
1873 * the place when trying to read them
1874 * back.
1875 *
1876 * Umpf.
1877 */
1878 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1879
10f3fee5 1880 (void)fdcpio(fdc,bp->b_cmd,
984263bc
MD		 1881 bp->b_data+fd->skip,
1882 bp->b_bcount);
1883
1884 }
1885 /* formatting */
1886 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1887 finfo->fd_formb_secshift,
1888 finfo->fd_formb_nsecs,
1889 finfo->fd_formb_gaplen,
1890 finfo->fd_formb_fillbyte, 0)) {
1891 /* controller fell over */
1892 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1893 isa_dmadone(isa_dmabp(bp),
984263bc
MD		 1894 bp->b_data + fd->skip,
1895 format ? bp->b_bcount : fdblk,
1896 fdc->dmachan);
1897 fdc->retry = 6;
1898 return (retrier(fdc));
1899 }
1900 } else {
1901 if (fdc->flags & FDC_NODMA) {
1902 /*
1903 * this seems to be necessary even when
1904 * reading data
1905 */
1906 SET_BCDR(fdc, 1, fdblk, 0);
1907
1908 /*
1909 * perform the write pseudo-DMA before
1910 * the WRITE command is sent
1911 */
1912 if (!read)
10f3fee5 1913 (void)fdcpio(fdc,bp->b_cmd,
984263bc
MD		 1914 bp->b_data+fd->skip,
1915 fdblk);
1916 }
1917 if (fd_cmd(fdc, 9,
1918 (read ? NE7CMD_READ : NE7CMD_WRITE),
1919 head << 2 | fdu, /* head & unit */
1920 fd->track, /* track */
1921 head,
1922 sec, /* sector + 1 */
983105c1 1923 fd->ft.secsize, /* sector size */
984263bc 1924 sectrac, /* sectors/track */
983105c1
MD		 1925 fd->ft.gap, /* gap size */
1926 fd->ft.datalen, /* data length */
984263bc
MD		 1927 0)) {
1928 /* the beast is sleeping again */
1929 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1930 isa_dmadone(isa_dmabp(bp),
984263bc
MD		 1931 bp->b_data + fd->skip,
1932 format ? bp->b_bcount : fdblk,
1933 fdc->dmachan);
1934 fdc->retry = 6;
1935 return (retrier(fdc));
1936 }
1937 }
1938 if (fdc->flags & FDC_NODMA)
1939 /*
1940 * if this is a read, then simply await interrupt
1941 * before performing PIO
1942 */
10f3fee5 1943 if (read && !fdcpio(fdc,bp->b_cmd,
984263bc 1944 bp->b_data+fd->skip,fdblk)) {
e8b273ff
MD		 1945 callout_reset(&fd->tohandle, hz,
1946 fd_iotimeout, fdc);
984263bc
MD		 1947 return(0); /* will return later */
1948 };
1949
1950 /*
1951 * write (or format) operation will fall through and
1952 * await completion interrupt
1953 */
1954 fdc->state = IOCOMPLETE;
e8b273ff 1955 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
984263bc
MD		 1956 return (0); /* will return later */
1957 case PIOREAD:
1958 /*
1959 * actually perform the PIO read. The IOCOMPLETE case
1960 * removes the timeout for us.
1961 */
10f3fee5 1962 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
984263bc
MD		 1963 fdc->state = IOCOMPLETE;
1964 /* FALLTHROUGH */
1965 case IOCOMPLETE: /* IO DONE, post-analyze */
e8b273ff 1966 callout_stop(&fd->tohandle);
984263bc
MD		 1967
1968 if (fd_read_status(fdc, fd->fdsu)) {
10f3fee5
MD		 1969 if (!(fdc->flags & FDC_NODMA)) {
1970 isa_dmadone(isa_dmabp(bp),
1971 bp->b_data + fd->skip,
984263bc
MD		 1972 format ? bp->b_bcount : fdblk,
1973 fdc->dmachan);
10f3fee5 1974 }
984263bc
MD		 1975 if (fdc->retry < 6)
1976 fdc->retry = 6; /* force a reset */
1977 return (retrier(fdc));
1978 }
1979
1980 fdc->state = IOTIMEDOUT;
1981
1982 /* FALLTHROUGH */
1983
1984 case IOTIMEDOUT:
10f3fee5
MD		 1985 if (!(fdc->flags & FDC_NODMA)) {
1986 isa_dmadone(isa_dmabp(bp),
1987 bp->b_data + fd->skip,
984263bc 1988 format ? bp->b_bcount : fdblk, fdc->dmachan);
10f3fee5 1989 }
984263bc
MD		 1990 if (fdc->status[0] & NE7_ST0_IC) {
1991 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1992 && fdc->status[1] & NE7_ST1_OR) {
1993 /*
1994 * DMA overrun. Someone hogged the bus and
1995 * didn't release it in time for the next
1996 * FDC transfer.
1997 *
1998 * We normally restart this without bumping
1999 * the retry counter. However, in case
2000 * something is seriously messed up (like
2001 * broken hardware), we rather limit the
2002 * number of retries so the IO operation
2003 * doesn't block indefinately.
2004 */
2005 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
2006 fdc->state = SEEKCOMPLETE;
2007 return (1);
2008 } /* else fall through */
2009 }
2010 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
2011 && fdc->retry < 6)
2012 fdc->retry = 6; /* force a reset */
2013 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2014 && fdc->status[2] & NE7_ST2_WC
2015 && fdc->retry < 3)
2016 fdc->retry = 3; /* force recalibrate */
2017 return (retrier(fdc));
2018 }
2019 /* All OK */
2020 /* Operation successful, retry DMA overruns again next time. */
2021 fdc->dma_overruns = 0;
2022 fd->skip += fdblk;
2023 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
2024 /* set up next transfer */
2025 fdc->state = DOSEEK;
2026 } else {
2027 /* ALL DONE */
2028 fd->skip = 0;
81b5c339 2029 fdc->bio = NULL;
984263bc
MD		 2030 device_unbusy(fd->dev);
2031 devstat_end_transaction_buf(&fd->device_stats, bp);
81b5c339 2032 biodone(bio);
984263bc
MD		 2033 fdc->fd = (fd_p) 0;
2034 fdc->fdu = -1;
2035 fdc->state = FINDWORK;
2036 }
2037 return (1);
2038 case RESETCTLR:
2039 fdc_reset(fdc);
2040 fdc->retry++;
2041 fdc->state = RESETCOMPLETE;
2042 return (0);
2043 case RESETCOMPLETE:
2044 /*
2045 * Discard all the results from the reset so that they
2046 * can't cause an unexpected interrupt later.
2047 */
2048 for (i = 0; i < 4; i++)
2049 (void)fd_sense_int(fdc, &st0, &cyl);
2050 fdc->state = STARTRECAL;
2051 /* Fall through. */
2052 case STARTRECAL:
2053 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
2054 /* arrgl */
2055 fdc->retry = 6;
2056 return (retrier(fdc));
2057 }
2058 fdc->state = RECALWAIT;
2059 return (0); /* will return later */
2060 case RECALWAIT:
2061 /* allow heads to settle */
4fc46503 2062 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
984263bc
MD		 2063 fdc->state = RECALCOMPLETE;
2064 return (0); /* will return later */
2065 case RECALCOMPLETE:
2066 do {
2067 /*
2068 * See SEEKCOMPLETE for a comment on this:
2069 */
2070 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2071 return 0;
2072 if(fdc->fdct == FDC_NE765
2073 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2074 return 0; /* hope for a real intr */
2075 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2076 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2077 {
2078 if(fdc->retry > 3)
2079 /*
2080 * a recalibrate from beyond cylinder 77
2081 * will "fail" due to the FDC limitations;
2082 * since people used to complain much about
2083 * the failure message, try not logging
2084 * this one if it seems to be the first
2085 * time in a line
2086 */
e3869ec7 2087 kprintf("fd%d: recal failed ST0 %b cyl %d\n",
984263bc
MD		 2088 fdu, st0, NE7_ST0BITS, cyl);
2089 if(fdc->retry < 3) fdc->retry = 3;
2090 return (retrier(fdc));
2091 }
2092 fd->track = 0;
2093 /* Seek (probably) necessary */
2094 fdc->state = DOSEEK;
2095 return (1); /* will return immediatly */
2096 case MOTORWAIT:
2097 if(fd->flags & FD_MOTOR_WAIT)
2098 {
2099 return (0); /* time's not up yet */
2100 }
2101 if (fdc->flags & FDC_NEEDS_RESET) {
2102 fdc->state = RESETCTLR;
2103 fdc->flags &= ~FDC_NEEDS_RESET;
2104 } else {
2105 /*
2106 * If all motors were off, then the controller was
2107 * reset, so it has lost track of the current
2108 * cylinder. Recalibrate to handle this case.
2109 * But first, discard the results of the reset.
2110 */
2111 fdc->state = RESETCOMPLETE;
2112 }
2113 return (1); /* will return immediatly */
2114 default:
2115 device_printf(fdc->fdc_dev, "unexpected FD int->");
2116 if (fd_read_status(fdc, fd->fdsu) == 0)
e3869ec7 2117 kprintf("FDC status :%x %x %x %x %x %x %x ",
984263bc
MD		 2118 fdc->status[0],
2119 fdc->status[1],
2120 fdc->status[2],
2121 fdc->status[3],
2122 fdc->status[4],
2123 fdc->status[5],
2124 fdc->status[6] );
2125 else
e3869ec7 2126 kprintf("No status available ");
984263bc
MD		 2127 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2128 {
e3869ec7 2129 kprintf("[controller is dead now]\n");
984263bc
MD		 2130 return (0);
2131 }
e3869ec7 2132 kprintf("ST0 = %x, PCN = %x\n", st0, cyl);
984263bc
MD		 2133 return (0);
2134 }
2135 /*XXX confusing: some branches return immediately, others end up here*/
2136 return (1); /* Come back immediatly to new state */
2137}
2138
2139static int
2140retrier(struct fdc_data *fdc)
2141{
81b5c339 2142 struct bio *bio;
3a1b0fdc 2143 struct buf *bp;
984263bc 2144 struct fd_data *fd;
b13267a5 2145 cdev_t dev;
984263bc
MD		 2146 int fdu;
2147
81b5c339
MD		 2148 bio = fdc->bio;
2149 bp = bio->bio_buf;
2150 dev = bio->bio_driver_info;
984263bc
MD		 2151
2152 /* XXX shouldn't this be cached somewhere? */
983105c1 2153 fdu = dkunit(dev);
984263bc
MD		 2154 fd = devclass_get_softc(fd_devclass, fdu);
2155 if (fd->options & FDOPT_NORETRY)
2156 goto fail;
2157
2158 switch (fdc->retry) {
2159 case 0: case 1: case 2:
2160 fdc->state = SEEKCOMPLETE;
2161 break;
2162 case 3: case 4: case 5:
2163 fdc->state = STARTRECAL;
2164 break;
2165 case 6:
2166 fdc->state = RESETCTLR;
2167 break;
2168 case 7:
2169 break;
2170 default:
2171 fail:
2172 {
2173 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
984263bc 2174
e4c9c0c8 2175 if (printerror) {
ee3ad2c9
MD		 2176 /*
2177 * note: use the correct device for more
2178 * verbose error reporting.
2179 */
983105c1 2180 diskerr(bio, dev,
ee3ad2c9 2181 "hard error", LOG_PRINTF,
a688b15c 2182 fdc->fd->skip);
e4c9c0c8 2183 }
984263bc
MD		 2184 if (printerror) {
2185 if (fdc->flags & FDC_STAT_VALID)
e3869ec7 2186 kprintf(
984263bc
MD		 2187 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2188 fdc->status[0], NE7_ST0BITS,
2189 fdc->status[1], NE7_ST1BITS,
2190 fdc->status[2], NE7_ST2BITS,
2191 fdc->status[3], fdc->status[4],
2192 fdc->status[5]);
2193 else
e3869ec7 2194 kprintf(" (No status)\n");
984263bc
MD		 2195 }
2196 }
2197 bp->b_flags |= B_ERROR;
2198 bp->b_error = EIO;
2199 bp->b_resid += bp->b_bcount - fdc->fd->skip;
81b5c339 2200 fdc->bio = NULL;
984263bc
MD		 2201 fdc->fd->skip = 0;
2202 device_unbusy(fd->dev);
2203 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
81b5c339 2204 biodone(bio);
984263bc
MD		 2205 fdc->state = FINDWORK;
2206 fdc->flags |= FDC_NEEDS_RESET;
2207 fdc->fd = (fd_p) 0;
2208 fdc->fdu = -1;
2209 return (1);
2210 }
2211 fdc->retry++;
2212 return (1);
2213}
2214
2215static int
b13267a5 2216fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred)
984263bc
MD		 2217{
2218 fdu_t fdu;
2219 fd_p fd;
984263bc 2220 struct buf *bp;
fbe276c7 2221 int rv = 0;
984263bc
MD		 2222 size_t fdblk;
2223
983105c1 2224 fdu = dkunit(dev);
984263bc 2225 fd = devclass_get_softc(fd_devclass, fdu);
983105c1 2226 fdblk = 128 << fd->ft.secsize;
984263bc
MD		 2227
2228 /* set up a buffer header for fdstrategy() */
014958fd 2229 bp = getpbuf(NULL);
10f3fee5 2230 bp->b_cmd = BUF_CMD_FORMAT;
984263bc
MD		 2231
2232 /*
2233 * calculate a fake blkno, so fdstrategy() would initiate a
2234 * seek to the requested cylinder
2235 */
54078292 2236 bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
983105c1
MD		 2237 (fd->ft.sectrac * fd->ft.heads)
2238 + finfo->head * fd->ft.sectrac) * fdblk;
81b5c339 2239 bp->b_bio1.bio_driver_info = dev;
ae8e83e6
MD		 2240 bp->b_bio1.bio_flags |= BIO_SYNC;
2241 bp->b_bio1.bio_done = biodone_sync;
984263bc
MD		 2242
2243 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2244 bp->b_data = (caddr_t)finfo;
2245
2246 /* now do the format */
81b5c339 2247 dev_dstrategy(dev, &bp->b_bio1);
984263bc
MD		 2248
2249 /* ...and wait for it to complete */
ae8e83e6 2250 rv = biowait_timeout(&bp->b_bio1, "fdform", 20 * hz);
984263bc
MD		 2251 if (rv == EWOULDBLOCK) {
2252 /* timed out */
2253 rv = EIO;
2254 device_unbusy(fd->dev);
81b5c339 2255 biodone(&bp->b_bio1);
984263bc
MD		 2256 }
2257 if (bp->b_flags & B_ERROR)
2258 rv = bp->b_error;
2259 /*
2260 * allow the process to be swapped
2261 */
014958fd 2262 relpbuf(bp, NULL);
984263bc
MD		 2263 return rv;
2264}
2265
2266/*
2267 * TODO: don't allocate buffer on stack.
2268 */
2269
2270static int
fef8985e 2271fdioctl(struct dev_ioctl_args *ap)
984263bc 2272{
b13267a5 2273 cdev_t dev = ap->a_head.a_dev;
983105c1 2274 fdu_t fdu = dkunit(dev);
984263bc 2275 fd_p fd = devclass_get_softc(fd_devclass, fdu);
984263bc 2276 struct fdc_status *fsp;
984263bc
MD		 2277 int error = 0;
2278
fef8985e 2279 switch (ap->a_cmd) {
984263bc 2280 case FD_FORM:
fef8985e 2281 if ((ap->a_fflag & FWRITE) == 0)
984263bc 2282 error = EBADF; /* must be opened for writing */
fef8985e 2283 else if (((struct fd_formb *)ap->a_data)->format_version !=
984263bc
MD		 2284 FD_FORMAT_VERSION)
2285 error = EINVAL; /* wrong version of formatting prog */
2286 else
fef8985e 2287 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred);
984263bc
MD		 2288 break;
2289
2290 case FD_GTYPE: /* get drive type */
983105c1 2291 *(struct fd_type *)ap->a_data = fd->ft;
984263bc
MD		 2292 break;
2293
2294 case FD_STYPE: /* set drive type */
2295 /* this is considered harmful; only allow for superuser */
895c1f85 2296 if (priv_check_cred(ap->a_cred, PRIV_ROOT, 0) != 0)
984263bc 2297 return EPERM;
983105c1 2298 fd->ft = *(struct fd_type *)ap->a_data;
984263bc
MD		 2299 break;
2300
2301 case FD_GOPTS: /* get drive options */
fef8985e 2302 *(int *)ap->a_data = fd->options;
984263bc
MD		 2303 break;
2304
2305 case FD_SOPTS: /* set drive options */
fef8985e 2306 fd->options = *(int *)ap->a_data;
984263bc
MD		 2307 break;
2308
2309 case FD_GSTAT:
fef8985e 2310 fsp = (struct fdc_status *)ap->a_data;
984263bc
MD		 2311 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2312 return EINVAL;
2313 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2314 break;
2315
2316 default:
2317 error = ENOTTY;
2318 break;
2319 }
2320 return (error);
2321}
2322
2323/*
2324 * Hello emacs, these are the
2325 * Local Variables:
2326 * c-indent-level: 8
2327 * c-continued-statement-offset: 8
2328 * c-continued-brace-offset: 0
2329 * c-brace-offset: -8
2330 * c-brace-imaginary-offset: 0
2331 * c-argdecl-indent: 8
2332 * c-label-offset: -8
2333 * c++-hanging-braces: 1
2334 * c++-access-specifier-offset: -8
2335 * c++-empty-arglist-indent: 8
2336 * c++-friend-offset: 0
2337 * End:
2338 */
DragonFly Project GIT Source repo