Remove diskpart(8) manual page.
[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 $
e3869ec7 54 * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.36 2006/12/22 23:26:16 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>
68#include <sys/disklabel.h>
69#include <sys/devicestat.h>
70#include <sys/fcntl.h>
71#include <sys/malloc.h>
72#include <sys/module.h>
73#include <sys/proc.h>
74#include <sys/syslog.h>
335dda38 75#include <sys/device.h>
984263bc 76#include <sys/bus.h>
984263bc 77#include <sys/rman.h>
3020e3be 78#include <sys/buf2.h>
fbe276c7 79#include <sys/thread2.h>
3020e3be 80
984263bc
MD
81#include <machine/clock.h>
82#include <machine/ioctl_fd.h>
984263bc
MD
83#include <machine/stdarg.h>
84
1f2de5d4
MD
85#include <bus/isa/isavar.h>
86#include <bus/isa/isareg.h>
87#include "fdreg.h"
88#include "fdc.h"
89#include <bus/isa/rtc.h>
984263bc 90
984263bc
MD
91/* configuration flags */
92#define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
93#define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
94
95/* internally used only, not really from CMOS: */
96#define RTCFDT_144M_PRETENDED 0x1000
97
98/* error returns for fd_cmd() */
99#define FD_FAILED -1
100#define FD_NOT_VALID -2
101#define FDC_ERRMAX 100 /* do not log more */
102/*
103 * Stop retrying after this many DMA overruns. Since each retry takes
104 * one revolution, with 300 rpm., 25 retries take approximately 10
105 * seconds which the read attempt will block in case the DMA overrun
106 * is persistent.
107 */
108#define FDC_DMAOV_MAX 25
109
110/*
111 * Timeout value for the PIO loops to wait until the FDC main status
112 * register matches our expectations (request for master, direction
113 * bit). This is supposed to be a number of microseconds, although
114 * timing might actually not be very accurate.
115 *
116 * Timeouts of 100 msec are believed to be required for some broken
117 * (old) hardware.
118 */
119#define FDSTS_TIMEOUT 100000
120
121#define NUMTYPES 17
122#define NUMDENS (NUMTYPES - 7)
123
124/* These defines (-1) must match index for fd_types */
125#define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
126#define NO_TYPE 0 /* must match NO_TYPE in ft.c */
127#define FD_1720 1
128#define FD_1480 2
129#define FD_1440 3
130#define FD_1200 4
131#define FD_820 5
132#define FD_800 6
133#define FD_720 7
134#define FD_360 8
135#define FD_640 9
136#define FD_1232 10
137
138#define FD_1480in5_25 11
139#define FD_1440in5_25 12
140#define FD_820in5_25 13
141#define FD_800in5_25 14
142#define FD_720in5_25 15
143#define FD_360in5_25 16
144#define FD_640in5_25 17
145
146
147static struct fd_type fd_types[NUMTYPES] =
148{
149{ 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
150{ 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
151{ 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
152{ 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
153{ 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
154{ 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
155{ 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
156{ 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
157{ 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
158{ 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
159
160{ 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
161{ 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
162{ 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
163{ 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
164{ 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
165{ 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
166{ 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
167};
168
169#define DRVS_PER_CTLR 2 /* 2 floppies */
170
171/***********************************************************************\
172* Per controller structure. *
173\***********************************************************************/
8c5c0470 174devclass_t fdc_devclass;
984263bc
MD
175
176/***********************************************************************\
177* Per drive structure. *
178* N per controller (DRVS_PER_CTLR) *
179\***********************************************************************/
180struct fd_data {
181 struct fdc_data *fdc; /* pointer to controller structure */
182 int fdsu; /* this units number on this controller */
183 int type; /* Drive type (FD_1440...) */
184 struct fd_type *ft; /* pointer to the type descriptor */
185 int flags;
186#define FD_OPEN 0x01 /* it's open */
187#define FD_ACTIVE 0x02 /* it's active */
188#define FD_MOTOR 0x04 /* motor should be on */
189#define FD_MOTOR_WAIT 0x08 /* motor coming up */
190 int skip;
191 int hddrv;
192#define FD_NO_TRACK -2
193 int track; /* where we think the head is */
194 int options; /* user configurable options, see ioctl_fd.h */
e8b273ff
MD
195 struct callout toffhandle;
196 struct callout tohandle;
4fc46503 197 struct callout motor;
984263bc
MD
198 struct devstat device_stats;
199 device_t dev;
200 fdu_t fdu;
201};
202
203struct fdc_ivars {
204 int fdunit;
205};
206static devclass_t fd_devclass;
207
208/***********************************************************************\
209* Throughout this file the following conventions will be used: *
210* fd is a pointer to the fd_data struct for the drive in question *
211* fdc is a pointer to the fdc_data struct for the controller *
212* fdu is the floppy drive unit number *
213* fdcu is the floppy controller unit number *
214* fdsu is the floppy drive unit number on that controller. (sub-unit) *
215\***********************************************************************/
216
217/* internal functions */
218static void fdc_intr(void *);
219static void set_motor(struct fdc_data *, int, int);
220# define TURNON 1
221# define TURNOFF 0
222static timeout_t fd_turnoff;
223static timeout_t fd_motor_on;
224static void fd_turnon(struct fd_data *);
225static void fdc_reset(fdc_p);
226static int fd_in(struct fdc_data *, int *);
227static int out_fdc(struct fdc_data *, int);
228static void fdstart(struct fdc_data *);
229static timeout_t fd_iotimeout;
230static timeout_t fd_pseudointr;
231static int fdstate(struct fdc_data *);
232static int retrier(struct fdc_data *);
b13267a5 233static int fdformat(cdev_t, struct fd_formb *, struct ucred *);
984263bc
MD
234
235static int enable_fifo(fdc_p fdc);
236
237static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
238
239
240#define DEVIDLE 0
241#define FINDWORK 1
242#define DOSEEK 2
243#define SEEKCOMPLETE 3
244#define IOCOMPLETE 4
245#define RECALCOMPLETE 5
246#define STARTRECAL 6
247#define RESETCTLR 7
248#define SEEKWAIT 8
249#define RECALWAIT 9
250#define MOTORWAIT 10
251#define IOTIMEDOUT 11
252#define RESETCOMPLETE 12
253#define PIOREAD 13
254
255#ifdef FDC_DEBUG
256static char const * const fdstates[] =
257{
258"DEVIDLE",
259"FINDWORK",
260"DOSEEK",
261"SEEKCOMPLETE",
262"IOCOMPLETE",
263"RECALCOMPLETE",
264"STARTRECAL",
265"RESETCTLR",
266"SEEKWAIT",
267"RECALWAIT",
268"MOTORWAIT",
269"IOTIMEDOUT",
270"RESETCOMPLETE",
271"PIOREAD",
272};
273
274/* CAUTION: fd_debug causes huge amounts of logging output */
275static int volatile fd_debug = 0;
e3869ec7
SW
276#define TRACE0(arg) if(fd_debug) kprintf(arg)
277#define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2)
984263bc
MD
278#else /* FDC_DEBUG */
279#define TRACE0(arg)
280#define TRACE1(arg1, arg2)
281#endif /* FDC_DEBUG */
282
8c5c0470 283void
984263bc
MD
284fdout_wr(fdc_p fdc, u_int8_t v)
285{
286 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
287}
288
289static u_int8_t
290fdsts_rd(fdc_p fdc)
291{
292 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
293}
294
295static void
296fddata_wr(fdc_p fdc, u_int8_t v)
297{
298 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
299}
300
301static u_int8_t
302fddata_rd(fdc_p fdc)
303{
304 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
305}
306
307static void
308fdctl_wr_isa(fdc_p fdc, u_int8_t v)
309{
310 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
311}
312
984263bc
MD
313#if 0
314
315static u_int8_t
316fdin_rd(fdc_p fdc)
317{
318 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
319}
320
321#endif
322
323static d_open_t Fdopen; /* NOTE, not fdopen */
324static d_close_t fdclose;
325static d_ioctl_t fdioctl;
326static d_strategy_t fdstrategy;
327
fef8985e
MD
328static struct dev_ops fd_ops = {
329 { "fd", FD_CDEV_MAJOR, D_DISK },
330 .d_open = Fdopen,
331 .d_close = fdclose,
332 .d_read = physread,
333 .d_write = physwrite,
334 .d_ioctl = fdioctl,
335 .d_strategy = fdstrategy,
984263bc
MD
336};
337
338static int
339fdc_err(struct fdc_data *fdc, const char *s)
340{
341 fdc->fdc_errs++;
342 if (s) {
343 if (fdc->fdc_errs < FDC_ERRMAX)
344 device_printf(fdc->fdc_dev, "%s", s);
345 else if (fdc->fdc_errs == FDC_ERRMAX)
346 device_printf(fdc->fdc_dev, "too many errors, not "
347 "logging any more\n");
348 }
349
350 return FD_FAILED;
351}
352
353/*
354 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
355 * Unit number,
356 * # of output bytes, output bytes as ints ...,
357 * # of input bytes, input bytes as ints ...
358 */
8c5c0470 359int
984263bc
MD
360fd_cmd(struct fdc_data *fdc, int n_out, ...)
361{
362 u_char cmd;
363 int n_in;
364 int n;
e2565a42 365 __va_list ap;
984263bc 366
e2565a42
MD
367 __va_start(ap, n_out);
368 cmd = (u_char)(__va_arg(ap, int));
369 __va_end(ap);
370 __va_start(ap, n_out);
984263bc
MD
371 for (n = 0; n < n_out; n++)
372 {
e2565a42 373 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
984263bc
MD
374 {
375 char msg[50];
f8c7a42d 376 ksnprintf(msg, sizeof(msg),
984263bc
MD
377 "cmd %x failed at out byte %d of %d\n",
378 cmd, n + 1, n_out);
379 return fdc_err(fdc, msg);
380 }
381 }
e2565a42 382 n_in = __va_arg(ap, int);
984263bc
MD
383 for (n = 0; n < n_in; n++)
384 {
e2565a42 385 int *ptr = __va_arg(ap, int *);
984263bc
MD
386 if (fd_in(fdc, ptr) < 0)
387 {
388 char msg[50];
f8c7a42d 389 ksnprintf(msg, sizeof(msg),
984263bc
MD
390 "cmd %02x failed at in byte %d of %d\n",
391 cmd, n + 1, n_in);
392 return fdc_err(fdc, msg);
393 }
394 }
395
396 return 0;
397}
398
399static int
400enable_fifo(fdc_p fdc)
401{
402 int i, j;
403
404 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
405
406 /*
407 * XXX:
408 * Cannot use fd_cmd the normal way here, since
409 * this might be an invalid command. Thus we send the
410 * first byte, and check for an early turn of data directon.
411 */
412
413 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
414 return fdc_err(fdc, "Enable FIFO failed\n");
415
416 /* If command is invalid, return */
417 j = FDSTS_TIMEOUT;
418 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
419 != NE7_RQM && j-- > 0) {
420 if (i == (NE7_DIO | NE7_RQM)) {
421 fdc_reset(fdc);
422 return FD_FAILED;
423 }
424 DELAY(1);
425 }
426 if (j<0 ||
427 fd_cmd(fdc, 3,
428 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
429 fdc_reset(fdc);
430 return fdc_err(fdc, "Enable FIFO failed\n");
431 }
432 fdc->flags |= FDC_HAS_FIFO;
433 return 0;
434 }
435 if (fd_cmd(fdc, 4,
436 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
437 return fdc_err(fdc, "Re-enable FIFO failed\n");
438 return 0;
439}
440
441static int
442fd_sense_drive_status(fdc_p fdc, int *st3p)
443{
444 int st3;
445
446 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
447 {
448 return fdc_err(fdc, "Sense Drive Status failed\n");
449 }
450 if (st3p)
451 *st3p = st3;
452
453 return 0;
454}
455
456static int
457fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
458{
459 int cyl, st0, ret;
460
461 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
462 if (ret) {
463 (void)fdc_err(fdc,
464 "sense intr err reading stat reg 0\n");
465 return ret;
466 }
467
468 if (st0p)
469 *st0p = st0;
470
471 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
472 /*
473 * There doesn't seem to have been an interrupt.
474 */
475 return FD_NOT_VALID;
476 }
477
478 if (fd_in(fdc, &cyl) < 0) {
479 return fdc_err(fdc, "can't get cyl num\n");
480 }
481
482 if (cylp)
483 *cylp = cyl;
484
485 return 0;
486}
487
488
489static int
490fd_read_status(fdc_p fdc, int fdsu)
491{
492 int i, ret;
493
494 for (i = 0; i < 7; i++) {
495 /*
496 * XXX types are poorly chosen. Only bytes can by read
497 * from the hardware, but fdc->status[] wants u_ints and
498 * fd_in() gives ints.
499 */
500 int status;
501
502 ret = fd_in(fdc, &status);
503 fdc->status[i] = status;
504 if (ret != 0)
505 break;
506 }
507
508 if (ret == 0)
509 fdc->flags |= FDC_STAT_VALID;
510 else
511 fdc->flags &= ~FDC_STAT_VALID;
512
513 return ret;
514}
515
516/****************************************************************************/
517/* autoconfiguration stuff */
518/****************************************************************************/
519
8c5c0470 520int
984263bc
MD
521fdc_alloc_resources(struct fdc_data *fdc)
522{
523 device_t dev;
524 int ispnp, ispcmcia;
525
526 dev = fdc->fdc_dev;
527 ispnp = (fdc->flags & FDC_ISPNP) != 0;
528 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
529 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
530 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
531
532 /*
533 * On standard ISA, we don't just use an 8 port range
534 * (e.g. 0x3f0-0x3f7) since that covers an IDE control
535 * register at 0x3f6.
536 *
537 * Isn't PC hardware wonderful.
538 *
539 * The Y-E Data PCMCIA FDC doesn't have this problem, it
540 * uses the register with offset 6 for pseudo-DMA, and the
541 * one with offset 7 as control register.
542 */
543 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
544 &fdc->rid_ioport, 0ul, ~0ul,
545 ispcmcia ? 8 : (ispnp ? 1 : 6),
546 RF_ACTIVE);
547 if (fdc->res_ioport == 0) {
548 device_printf(dev, "cannot reserve I/O port range\n");
549 return ENXIO;
550 }
551 fdc->portt = rman_get_bustag(fdc->res_ioport);
552 fdc->porth = rman_get_bushandle(fdc->res_ioport);
553
554 if (!ispcmcia) {
555 /*
556 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
557 * and some at 0x3f0-0x3f5,0x3f7. We detect the former
558 * by checking the size and adjust the port address
559 * accordingly.
560 */
561 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
562 fdc->port_off = -2;
563
564 /*
565 * Register the control port range as rid 1 if it
566 * isn't there already. Most PnP BIOSen will have
567 * already done this but non-PnP configurations don't.
568 *
569 * And some (!!) report 0x3f2-0x3f5 and completely
570 * leave out the control register! It seems that some
571 * non-antique controller chips have a different
572 * method of programming the transfer speed which
573 * doesn't require the control register, but it's
574 * mighty bogus as the chip still responds to the
575 * address for the control register.
576 */
577 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
578 u_long ctlstart;
579
580 /* Find the control port, usually 0x3f7 */
581 ctlstart = rman_get_start(fdc->res_ioport) +
582 fdc->port_off + 7;
583
584 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
585 }
586
587 /*
588 * Now (finally!) allocate the control port.
589 */
590 fdc->rid_ctl = 1;
591 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
592 &fdc->rid_ctl,
593 0ul, ~0ul, 1, RF_ACTIVE);
594 if (fdc->res_ctl == 0) {
595 device_printf(dev,
596 "cannot reserve control I/O port range\n");
597 return ENXIO;
598 }
599 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
600 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
601 }
602
603 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
604 &fdc->rid_irq, 0ul, ~0ul, 1,
605 RF_ACTIVE);
606 if (fdc->res_irq == 0) {
607 device_printf(dev, "cannot reserve interrupt line\n");
608 return ENXIO;
609 }
610
611 if ((fdc->flags & FDC_NODMA) == 0) {
612 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
613 &fdc->rid_drq, 0ul, ~0ul, 1,
614 RF_ACTIVE);
615 if (fdc->res_drq == 0) {
616 device_printf(dev, "cannot reserve DMA request line\n");
617 return ENXIO;
618 }
619 fdc->dmachan = fdc->res_drq->r_start;
620 }
621
622 return 0;
623}
624
8c5c0470 625void
984263bc
MD
626fdc_release_resources(struct fdc_data *fdc)
627{
628 device_t dev;
629
630 dev = fdc->fdc_dev;
631 if (fdc->res_irq != 0) {
632 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
633 fdc->res_irq);
634 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
635 fdc->res_irq);
636 }
637 if (fdc->res_ctl != 0) {
638 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
639 fdc->res_ctl);
640 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
641 fdc->res_ctl);
642 }
643 if (fdc->res_ioport != 0) {
644 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
645 fdc->res_ioport);
646 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
647 fdc->res_ioport);
648 }
649 if (fdc->res_drq != 0) {
650 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
651 fdc->res_drq);
652 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
653 fdc->res_drq);
654 }
655}
656
657/****************************************************************************/
658/* autoconfiguration stuff */
659/****************************************************************************/
660
661static struct isa_pnp_id fdc_ids[] = {
662 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
663 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
664 {0}
665};
666
8c5c0470 667int
984263bc
MD
668fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
669{
670 struct fdc_ivars *ivars = device_get_ivars(child);
671
672 switch (which) {
673 case FDC_IVAR_FDUNIT:
674 *result = ivars->fdunit;
675 break;
676 default:
677 return ENOENT;
678 }
679 return 0;
680}
681
682/*
683 * fdc controller section.
684 */
685static int
686fdc_probe(device_t dev)
687{
688 int error, ic_type;
689 struct fdc_data *fdc;
690
691 fdc = device_get_softc(dev);
692 bzero(fdc, sizeof *fdc);
693 fdc->fdc_dev = dev;
694 fdc->fdctl_wr = fdctl_wr_isa;
695
696 /* Check pnp ids */
697 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
698 if (error == ENXIO)
699 return ENXIO;
700 if (error == 0)
701 fdc->flags |= FDC_ISPNP;
702
703 /* Attempt to allocate our resources for the duration of the probe */
704 error = fdc_alloc_resources(fdc);
705 if (error)
706 goto out;
707
708 /* First - lets reset the floppy controller */
709 fdout_wr(fdc, 0);
710 DELAY(100);
711 fdout_wr(fdc, FDO_FRST);
712
713 /* see if it can handle a command */
714 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
715 NE7_SPEC_2(2, 0), 0)) {
716 error = ENXIO;
717 goto out;
718 }
719
720 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
721 ic_type = (u_char)ic_type;
722 switch (ic_type) {
723 case 0x80:
724 device_set_desc(dev, "NEC 765 or clone");
725 fdc->fdct = FDC_NE765;
726 break;
727 case 0x81:
728 device_set_desc(dev, "Intel 82077 or clone");
729 fdc->fdct = FDC_I82077;
730 break;
731 case 0x90:
732 device_set_desc(dev, "NEC 72065B or clone");
733 fdc->fdct = FDC_NE72065;
734 break;
735 default:
736 device_set_desc(dev, "generic floppy controller");
737 fdc->fdct = FDC_UNKNOWN;
738 break;
739 }
740 }
741
742out:
743 fdc_release_resources(fdc);
744 return (error);
745}
746
984263bc
MD
747/*
748 * Add a child device to the fdc controller. It will then be probed etc.
749 */
750static void
751fdc_add_child(device_t dev, const char *name, int unit)
752{
753 int disabled;
754 struct fdc_ivars *ivar;
755 device_t child;
756
efda3bd0 757 ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
984263bc
MD
758 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
759 ivar->fdunit = 0;
760 child = device_add_child(dev, name, unit);
761 if (child == NULL)
762 return;
763 device_set_ivars(child, ivar);
764 if (resource_int_value(name, unit, "disabled", &disabled) == 0
765 && disabled != 0)
766 device_disable(child);
767}
768
8c5c0470 769int
984263bc
MD
770fdc_attach(device_t dev)
771{
772 struct fdc_data *fdc;
773 int i, error;
774
775 fdc = device_get_softc(dev);
8b97cf2a
JS
776
777 callout_init(&fdc->pseudointr_ch);
778
984263bc
MD
779 error = fdc_alloc_resources(fdc);
780 if (error) {
781 device_printf(dev, "cannot re-aquire resources\n");
782 return error;
783 }
784 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
ee61f228 785 0, fdc_intr, fdc,
e9cb6d99 786 &fdc->fdc_intr, NULL);
984263bc
MD
787 if (error) {
788 device_printf(dev, "cannot setup interrupt\n");
789 return error;
790 }
791 fdc->fdcu = device_get_unit(dev);
792 fdc->flags |= FDC_ATTACHED;
793
794 if ((fdc->flags & FDC_NODMA) == 0) {
795 /* Acquire the DMA channel forever, The driver will do the rest */
796 /* XXX should integrate with rman */
797 isa_dma_acquire(fdc->dmachan);
798 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
799 }
800 fdc->state = DEVIDLE;
801
802 /* reset controller, turn motor off, clear fdout mirror reg */
803 fdout_wr(fdc, ((fdc->fdout = 0)));
81b5c339 804 bioq_init(&fdc->bio_queue);
984263bc
MD
805
806 /*
807 * Probe and attach any children. We should probably detect
808 * devices from the BIOS unless overridden.
809 */
810 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
811 i != -1;
812 i = resource_query_string(i, "at", device_get_nameunit(dev)))
813 fdc_add_child(dev, resource_query_name(i),
814 resource_query_unit(i));
815
816 return (bus_generic_attach(dev));
817}
818
8c5c0470 819int
984263bc
MD
820fdc_print_child(device_t me, device_t child)
821{
822 int retval = 0;
823
824 retval += bus_print_child_header(me, child);
e3869ec7 825 retval += kprintf(" on %s drive %d\n", device_get_nameunit(me),
984263bc
MD
826 fdc_get_fdunit(child));
827
828 return (retval);
829}
830
831static device_method_t fdc_methods[] = {
832 /* Device interface */
833 DEVMETHOD(device_probe, fdc_probe),
834 DEVMETHOD(device_attach, fdc_attach),
835 DEVMETHOD(device_detach, bus_generic_detach),
836 DEVMETHOD(device_shutdown, bus_generic_shutdown),
837 DEVMETHOD(device_suspend, bus_generic_suspend),
838 DEVMETHOD(device_resume, bus_generic_resume),
839
840 /* Bus interface */
841 DEVMETHOD(bus_print_child, fdc_print_child),
842 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
843 /* Our children never use any other bus interface methods. */
844
845 { 0, 0 }
846};
847
848static driver_t fdc_driver = {
849 "fdc",
850 fdc_methods,
851 sizeof(struct fdc_data)
852};
853
854DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
855
984263bc
MD
856/******************************************************************/
857/*
858 * devices attached to the controller section.
859 */
860static int
861fd_probe(device_t dev)
862{
863 int i;
864 u_int fdt, st0, st3;
865 struct fd_data *fd;
866 struct fdc_data *fdc;
867 fdsu_t fdsu;
868 static int fd_fifo = 0;
869
870 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
871 fd = device_get_softc(dev);
872 fdc = device_get_softc(device_get_parent(dev));
873
874 bzero(fd, sizeof *fd);
875 fd->dev = dev;
876 fd->fdc = fdc;
877 fd->fdsu = fdsu;
878 fd->fdu = device_get_unit(dev);
879
880#ifdef __i386__
881 /* look up what bios thinks we have */
882 switch (fd->fdu) {
883 case 0:
884 if ((fdc->flags & FDC_ISPCMCIA))
885 fdt = RTCFDT_144M;
886 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
887 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
888 else
889 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
890 break;
891 case 1:
892 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
893 break;
894 default:
895 fdt = RTCFDT_NONE;
896 break;
897 }
898#else
899 fdt = RTCFDT_144M; /* XXX probably */
900#endif
901
902 /* is there a unit? */
903 if (fdt == RTCFDT_NONE)
904 return (ENXIO);
905
906 /* select it */
907 set_motor(fdc, fdsu, TURNON);
908 DELAY(1000000); /* 1 sec */
909
910 /* XXX This doesn't work before the first set_motor() */
911 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
912 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
913 && enable_fifo(fdc) == 0) {
914 device_printf(device_get_parent(dev),
915 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
916 }
917 fd_fifo = 1;
918
919 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
920 && (st3 & NE7_ST3_T0)) {
921 /* if at track 0, first seek inwards */
922 /* seek some steps: */
923 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
924 DELAY(300000); /* ...wait a moment... */
925 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
926 }
927
928 /* If we're at track 0 first seek inwards. */
929 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
930 /* Seek some steps... */
931 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
932 /* ...wait a moment... */
933 DELAY(300000);
934 /* make ctrlr happy: */
935 fd_sense_int(fdc, 0, 0);
936 }
937 }
938
939 for (i = 0; i < 2; i++) {
940 /*
941 * we must recalibrate twice, just in case the
942 * heads have been beyond cylinder 76, since most
943 * FDCs still barf when attempting to recalibrate
944 * more than 77 steps
945 */
946 /* go back to 0: */
947 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
948 /* a second being enough for full stroke seek*/
949 DELAY(i == 0 ? 1000000 : 300000);
950
951 /* anything responding? */
952 if (fd_sense_int(fdc, &st0, 0) == 0 &&
953 (st0 & NE7_ST0_EC) == 0)
954 break; /* already probed succesfully */
955 }
956 }
957
958 set_motor(fdc, fdsu, TURNOFF);
959
960 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
961 return (ENXIO);
962
963 fd->track = FD_NO_TRACK;
964 fd->fdc = fdc;
965 fd->fdsu = fdsu;
966 fd->options = 0;
e8b273ff
MD
967 callout_init(&fd->toffhandle);
968 callout_init(&fd->tohandle);
4fc46503 969 callout_init(&fd->motor);
984263bc
MD
970
971 switch (fdt) {
972 case RTCFDT_12M:
973 device_set_desc(dev, "1200-KB 5.25\" drive");
974 fd->type = FD_1200;
975 break;
976 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
977 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
978 fdt = RTCFDT_144M;
979 fd->type = FD_1440;
980 case RTCFDT_144M:
981 device_set_desc(dev, "1440-KB 3.5\" drive");
982 fd->type = FD_1440;
983 break;
984 case RTCFDT_288M:
985 case RTCFDT_288M_1:
986 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
987 fd->type = FD_1440;
988 break;
989 case RTCFDT_360K:
990 device_set_desc(dev, "360-KB 5.25\" drive");
991 fd->type = FD_360;
992 break;
993 case RTCFDT_720K:
e3869ec7 994 kprintf("720-KB 3.5\" drive");
984263bc
MD
995 fd->type = FD_720;
996 break;
997 default:
998 return (ENXIO);
999 }
1000 return (0);
1001}
1002
1003static int
1004fd_attach(device_t dev)
1005{
1006 struct fd_data *fd;
1007#if 0
1008 int i;
1009 int mynor;
1010 int typemynor;
1011 int typesize;
1012#endif
984263bc
MD
1013
1014 fd = device_get_softc(dev);
1015
fef8985e
MD
1016 dev_ops_add(&fd_ops, -1 << 6, fd->fdu << 6);
1017 make_dev(&fd_ops, (fd->fdu << 6),
984263bc
MD
1018 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu);
1019
1020#if 0
1021 /* Other make_dev() go here. */
1022#endif
1023
1024 /*
1025 * Export the drive to the devstat interface.
1026 */
1027 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1028 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1029 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1030 DEVSTAT_PRIORITY_FD);
1031 return (0);
1032}
1033
1034static int
1035fd_detach(device_t dev)
1036{
1037 struct fd_data *fd;
1038
1039 fd = device_get_softc(dev);
e8b273ff 1040 callout_stop(&fd->toffhandle);
4fc46503 1041 callout_stop(&fd->motor);
984263bc
MD
1042
1043 return (0);
1044}
1045
1046static device_method_t fd_methods[] = {
1047 /* Device interface */
1048 DEVMETHOD(device_probe, fd_probe),
1049 DEVMETHOD(device_attach, fd_attach),
1050 DEVMETHOD(device_detach, fd_detach),
1051 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1052 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1053 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1054
1055 { 0, 0 }
1056};
1057
1058static driver_t fd_driver = {
1059 "fd",
1060 fd_methods,
1061 sizeof(struct fd_data)
1062};
1063
1064DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1065
1066/****************************************************************************/
1067/* motor control stuff */
1068/* remember to not deselect the drive we're working on */
1069/****************************************************************************/
1070static void
1071set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1072{
1073 int fdout = fdc->fdout;
1074 int needspecify = 0;
1075
1076 if(turnon) {
1077 fdout &= ~FDO_FDSEL;
1078 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1079 } else
1080 fdout &= ~(FDO_MOEN0 << fdsu);
1081
1082 if(!turnon
1083 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1084 /* gonna turn off the last drive, put FDC to bed */
1085 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1086 else {
1087 /* make sure controller is selected and specified */
1088 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1089 needspecify = 1;
1090 fdout |= (FDO_FRST|FDO_FDMAEN);
1091 }
1092
1093 fdout_wr(fdc, fdout);
1094 fdc->fdout = fdout;
1095 TRACE1("[0x%x->FDOUT]", fdout);
1096
1097 if (needspecify) {
1098 /*
1099 * XXX
1100 * special case: since we have just woken up the FDC
1101 * from its sleep, we silently assume the command will
1102 * be accepted, and do not test for a timeout
1103 */
1104 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1105 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1106 0);
1107 if (fdc->flags & FDC_HAS_FIFO)
1108 (void) enable_fifo(fdc);
1109 }
1110}
1111
1112static void
1113fd_turnoff(void *xfd)
1114{
984263bc
MD
1115 fd_p fd = xfd;
1116
1117 TRACE1("[fd%d: turnoff]", fd->fdu);
1118
fbe276c7 1119 crit_enter();
984263bc
MD
1120 /*
1121 * Don't turn off the motor yet if the drive is active.
1122 *
1123 * If we got here, this could only mean we missed an interrupt.
1124 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1125 * after a controller reset. Just schedule a pseudo-interrupt
1126 * so the state machine gets re-entered.
1127 */
1128 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1129 fdc_intr(fd->fdc);
fbe276c7 1130 crit_exit();
984263bc
MD
1131 return;
1132 }
1133
1134 fd->flags &= ~FD_MOTOR;
1135 set_motor(fd->fdc, fd->fdsu, TURNOFF);
fbe276c7 1136 crit_exit();
984263bc
MD
1137}
1138
1139static void
1140fd_motor_on(void *xfd)
1141{
984263bc
MD
1142 fd_p fd = xfd;
1143
fbe276c7 1144 crit_enter();
984263bc
MD
1145 fd->flags &= ~FD_MOTOR_WAIT;
1146 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1147 {
1148 fdc_intr(fd->fdc);
1149 }
fbe276c7 1150 crit_exit();
984263bc
MD
1151}
1152
1153static void
1154fd_turnon(fd_p fd)
1155{
1156 if(!(fd->flags & FD_MOTOR))
1157 {
1158 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1159 set_motor(fd->fdc, fd->fdsu, TURNON);
4fc46503 1160 callout_reset(&fd->motor, hz, fd_motor_on, fd);
984263bc
MD
1161 }
1162}
1163
1164static void
1165fdc_reset(fdc_p fdc)
1166{
1167 /* Try a reset, keep motor on */
1168 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1169 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1170 DELAY(100);
1171 /* enable FDC, but defer interrupts a moment */
1172 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1173 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1174 DELAY(100);
1175 fdout_wr(fdc, fdc->fdout);
1176 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1177
1178 /* XXX after a reset, silently believe the FDC will accept commands */
1179 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1180 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1181 0);
1182 if (fdc->flags & FDC_HAS_FIFO)
1183 (void) enable_fifo(fdc);
1184}
1185
1186/****************************************************************************/
1187/* fdc in/out */
1188/****************************************************************************/
1189/*
1190 * FDC IO functions, take care of the main status register, timeout
1191 * in case the desired status bits are never set.
1192 *
1193 * These PIO loops initially start out with short delays between
1194 * each iteration in the expectation that the required condition
1195 * is usually met quickly, so it can be handled immediately. After
1196 * about 1 ms, stepping is increased to achieve a better timing
1197 * accuracy in the calls to DELAY().
1198 */
1199static int
1200fd_in(struct fdc_data *fdc, int *ptr)
1201{
1202 int i, j, step;
1203
1204 for (j = 0, step = 1;
1205 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1206 j < FDSTS_TIMEOUT;
1207 j += step) {
1208 if (i == NE7_RQM)
1209 return (fdc_err(fdc, "ready for output in input\n"));
1210 if (j == 1000)
1211 step = 1000;
1212 DELAY(step);
1213 }
1214 if (j >= FDSTS_TIMEOUT)
1215 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1216#ifdef FDC_DEBUG
1217 i = fddata_rd(fdc);
1218 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1219 *ptr = i;
1220 return (0);
1221#else /* !FDC_DEBUG */
1222 i = fddata_rd(fdc);
1223 if (ptr)
1224 *ptr = i;
1225 return (0);
1226#endif /* FDC_DEBUG */
1227}
1228
1229static int
1230out_fdc(struct fdc_data *fdc, int x)
1231{
1232 int i, j, step;
1233
1234 for (j = 0, step = 1;
1235 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1236 j < FDSTS_TIMEOUT;
1237 j += step) {
1238 if (i == (NE7_DIO|NE7_RQM))
1239 return (fdc_err(fdc, "ready for input in output\n"));
1240 if (j == 1000)
1241 step = 1000;
1242 DELAY(step);
1243 }
1244 if (j >= FDSTS_TIMEOUT)
1245 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1246
1247 /* Send the command and return */
1248 fddata_wr(fdc, x);
1249 TRACE1("[0x%x->FDDATA]", x);
1250 return (0);
1251}
1252
1253/****************************************************************************/
1254/* fdopen/fdclose */
1255/****************************************************************************/
1256int
fef8985e 1257Fdopen(struct dev_open_args *ap)
984263bc 1258{
b13267a5 1259 cdev_t dev = ap->a_head.a_dev;
984263bc
MD
1260 fdu_t fdu = FDUNIT(minor(dev));
1261 int type = FDTYPE(minor(dev));
1262 fd_p fd;
1263 fdc_p fdc;
1264
1265 /* check bounds */
1266 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1267 return (ENXIO);
1268 fdc = fd->fdc;
1269 if ((fdc == NULL) || (fd->type == NO_TYPE))
1270 return (ENXIO);
1271 if (type > NUMDENS)
1272 return (ENXIO);
1273 if (type == 0)
1274 type = fd->type;
1275 else {
1276 /*
1277 * For each type of basic drive, make sure we are trying
1278 * to open a type it can do,
1279 */
1280 if (type != fd->type) {
1281 switch (fd->type) {
1282 case FD_360:
1283 return (ENXIO);
1284 case FD_720:
1285 if ( type != FD_820
1286 && type != FD_800
1287 && type != FD_640
1288 )
1289 return (ENXIO);
1290 break;
1291 case FD_1200:
1292 switch (type) {
1293 case FD_1480:
1294 type = FD_1480in5_25;
1295 break;
1296 case FD_1440:
1297 type = FD_1440in5_25;
1298 break;
1299 case FD_1232:
1300 break;
1301 case FD_820:
1302 type = FD_820in5_25;
1303 break;
1304 case FD_800:
1305 type = FD_800in5_25;
1306 break;
1307 case FD_720:
1308 type = FD_720in5_25;
1309 break;
1310 case FD_640:
1311 type = FD_640in5_25;
1312 break;
1313 case FD_360:
1314 type = FD_360in5_25;
1315 break;
1316 default:
1317 return(ENXIO);
1318 }
1319 break;
1320 case FD_1440:
1321 if ( type != FD_1720
1322 && type != FD_1480
1323 && type != FD_1200
1324 && type != FD_820
1325 && type != FD_800
1326 && type != FD_720
1327 && type != FD_640
1328 )
1329 return(ENXIO);
1330 break;
1331 }
1332 }
1333 }
1334 fd->ft = fd_types + type - 1;
1335 fd->flags |= FD_OPEN;
1336 /*
1337 * Clearing the DMA overrun counter at open time is a bit messy.
1338 * Since we're only managing one counter per controller, opening
1339 * the second drive could mess it up. Anyway, if the DMA overrun
1340 * condition is really persistent, it will eventually time out
1341 * still. OTOH, clearing it here will ensure we'll at least start
1342 * trying again after a previous (maybe even long ago) failure.
1343 * Also, this is merely a stop-gap measure only that should not
1344 * happen during normal operation, so we can tolerate it to be a
1345 * bit sloppy about this.
1346 */
1347 fdc->dma_overruns = 0;
1348
1349 return 0;
1350}
1351
1352int
fef8985e 1353fdclose(struct dev_close_args *ap)
984263bc 1354{
b13267a5 1355 cdev_t dev = ap->a_head.a_dev;
984263bc
MD
1356 fdu_t fdu = FDUNIT(minor(dev));
1357 struct fd_data *fd;
1358
1359 fd = devclass_get_softc(fd_devclass, fdu);
1360 fd->flags &= ~FD_OPEN;
1361 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1362
1363 return (0);
1364}
1365
1366/****************************************************************************/
1367/* fdstrategy */
1368/****************************************************************************/
fef8985e
MD
1369int
1370fdstrategy(struct dev_strategy_args *ap)
984263bc 1371{
b13267a5 1372 cdev_t dev = ap->a_head.a_dev;
fef8985e 1373 struct bio *bio = ap->a_bio;
81b5c339 1374 struct buf *bp = bio->bio_buf;
984263bc 1375 unsigned nblocks, blknum, cando;
984263bc
MD
1376 fdu_t fdu;
1377 fdc_p fdc;
1378 fd_p fd;
1379 size_t fdblk;
1380
81b5c339 1381 fdu = FDUNIT(minor(dev));
984263bc
MD
1382 fd = devclass_get_softc(fd_devclass, fdu);
1383 if (fd == 0)
1384 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
81b5c339 1385 (u_long)major(dev), (u_long)minor(dev));
984263bc
MD
1386 fdc = fd->fdc;
1387 if (fd->type == NO_TYPE) {
1388 bp->b_error = ENXIO;
1389 bp->b_flags |= B_ERROR;
1390 goto bad;
1391 };
1392
1393 fdblk = 128 << (fd->ft->secsize);
10f3fee5 1394 if (bp->b_cmd != BUF_CMD_FORMAT) {
54078292 1395 if (bio->bio_offset < 0) {
e3869ec7 1396 kprintf(
54078292
MD
1397 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n",
1398 fdu, bio->bio_offset, bp->b_bcount);
984263bc
MD
1399 bp->b_error = EINVAL;
1400 bp->b_flags |= B_ERROR;
1401 goto bad;
1402 }
1403 if ((bp->b_bcount % fdblk) != 0) {
1404 bp->b_error = EINVAL;
1405 bp->b_flags |= B_ERROR;
1406 goto bad;
1407 }
1408 }
1409
1410 /*
1411 * Set up block calculations.
1412 */
54078292 1413 if (bio->bio_offset > 20000000LL * fdblk) {
984263bc
MD
1414 /*
1415 * Reject unreasonably high block number, prevent the
1416 * multiplication below from overflowing.
1417 */
1418 bp->b_error = EINVAL;
1419 bp->b_flags |= B_ERROR;
1420 goto bad;
1421 }
54078292 1422 blknum = (unsigned)(bio->bio_offset / fdblk);
984263bc
MD
1423 nblocks = fd->ft->size;
1424 bp->b_resid = 0;
1425 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1426 if (blknum <= nblocks) {
1427 cando = (nblocks - blknum) * fdblk;
1428 bp->b_resid = bp->b_bcount - cando;
1429 if (cando == 0)
1430 goto bad; /* not actually bad but EOF */
1431 } else {
1432 bp->b_error = EINVAL;
1433 bp->b_flags |= B_ERROR;
1434 goto bad;
1435 }
1436 }
fbe276c7 1437 crit_enter();
81b5c339
MD
1438 bio->bio_driver_info = dev;
1439 bioqdisksort(&fdc->bio_queue, bio);
e8b273ff 1440 callout_stop(&fd->toffhandle);
984263bc
MD
1441
1442 /* Tell devstat we are starting on the transaction */
1443 devstat_start_transaction(&fd->device_stats);
1444 device_busy(fd->dev);
1445
1446 fdstart(fdc);
fbe276c7 1447 crit_exit();
fef8985e 1448 return(0);
984263bc
MD
1449
1450bad:
81b5c339 1451 biodone(bio);
fef8985e 1452 return(0);
984263bc
MD
1453}
1454
1455/***************************************************************\
1456* fdstart *
1457* We have just queued something.. if the controller is not busy *
1458* then simulate the case where it has just finished a command *
1459* So that it (the interrupt routine) looks on the queue for more*
1460* work to do and picks up what we just added. *
1461* If the controller is already busy, we need do nothing, as it *
1462* will pick up our work when the present work completes *
1463\***************************************************************/
1464static void
1465fdstart(struct fdc_data *fdc)
1466{
fbe276c7 1467 crit_enter();
984263bc
MD
1468 if(fdc->state == DEVIDLE)
1469 {
1470 fdc_intr(fdc);
1471 }
fbe276c7 1472 crit_exit();
984263bc
MD
1473}
1474
1475static void
1476fd_iotimeout(void *xfdc)
1477{
1478 fdc_p fdc;
984263bc
MD
1479
1480 fdc = xfdc;
1481 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1482
1483 /*
1484 * Due to IBM's brain-dead design, the FDC has a faked ready
1485 * signal, hardwired to ready == true. Thus, any command
1486 * issued if there's no diskette in the drive will _never_
1487 * complete, and must be aborted by resetting the FDC.
1488 * Many thanks, Big Blue!
1489 * The FDC must not be reset directly, since that would
1490 * interfere with the state machine. Instead, pretend that
1491 * the command completed but was invalid. The state machine
1492 * will reset the FDC and retry once.
1493 */
fbe276c7 1494 crit_enter();
984263bc
MD
1495 fdc->status[0] = NE7_ST0_IC_IV;
1496 fdc->flags &= ~FDC_STAT_VALID;
1497 fdc->state = IOTIMEDOUT;
1498 fdc_intr(fdc);
fbe276c7 1499 crit_exit();
984263bc
MD
1500}
1501
fbe276c7 1502/* just ensure it is running in a critical section */
984263bc
MD
1503static void
1504fd_pseudointr(void *xfdc)
1505{
fbe276c7 1506 crit_enter();
984263bc 1507 fdc_intr(xfdc);
fbe276c7 1508 crit_exit();
984263bc
MD
1509}
1510
1511/***********************************************************************\
1512* fdintr *
1513* keep calling the state machine until it returns a 0 *
1514* ALWAYS called at SPLBIO *
1515\***********************************************************************/
1516static void
1517fdc_intr(void *xfdc)
1518{
1519 fdc_p fdc = xfdc;
1520 while(fdstate(fdc))
1521 ;
1522}
1523
1524/*
1525 * magic pseudo-DMA initialization for YE FDC. Sets count and
1526 * direction
1527 */
1528#define SET_BCDR(fdc,wr,cnt,port) \
1529 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1530 ((cnt)-1) & 0xff); \
1531 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1532 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1533
1534/*
1535 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1536 */
10f3fee5 1537static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
984263bc
MD
1538{
1539 u_char *cptr = (u_char *)addr;
1540
10f3fee5 1541 if (cmd == BUF_CMD_READ) {
984263bc
MD
1542 if (fdc->state != PIOREAD) {
1543 fdc->state = PIOREAD;
1544 return(0);
1545 };
1546 SET_BCDR(fdc, 0, count, 0);
1547 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1548 FDC_YE_DATAPORT, cptr, count);
1549 } else {
1550 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1551 FDC_YE_DATAPORT, cptr, count);
1552 SET_BCDR(fdc, 0, count, 0);
1553 };
1554 return(1);
1555}
1556
1557/***********************************************************************\
1558* The controller state machine. *
1559* if it returns a non zero value, it should be called again immediatly *
1560\***********************************************************************/
1561static int
1562fdstate(fdc_p fdc)
1563{
1564 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1565 unsigned blknum = 0, b_cylinder = 0;
1566 fdu_t fdu = fdc->fdu;
1567 fd_p fd;
81b5c339 1568 struct bio *bio;
3a1b0fdc 1569 struct buf *bp;
984263bc
MD
1570 struct fd_formb *finfo = NULL;
1571 size_t fdblk;
b13267a5 1572 cdev_t dev;
81b5c339
MD
1573
1574 bio = fdc->bio;
1575 if (bio == NULL) {
1576 bio = bioq_first(&fdc->bio_queue);
1577 if (bio != NULL) {
1578 bioq_remove(&fdc->bio_queue, bio);
1579 fdc->bio = bio;
984263bc
MD
1580 }
1581 }
81b5c339 1582 if (bio == NULL) {
984263bc
MD
1583 /***********************************************\
1584 * nothing left for this controller to do *
1585 * Force into the IDLE state, *
1586 \***********************************************/
1587 fdc->state = DEVIDLE;
1588 if (fdc->fd) {
1589 device_printf(fdc->fdc_dev,
1590 "unexpected valid fd pointer\n");
1591 fdc->fd = (fd_p) 0;
1592 fdc->fdu = -1;
1593 }
1594 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1595 return (0);
1596 }
81b5c339
MD
1597 bp = bio->bio_buf;
1598 dev = bio->bio_driver_info;
1599
1600 fdu = FDUNIT(minor(dev));
984263bc
MD
1601 fd = devclass_get_softc(fd_devclass, fdu);
1602 fdblk = 128 << fd->ft->secsize;
1603 if (fdc->fd && (fd != fdc->fd))
1604 device_printf(fd->dev, "confused fd pointers\n");
10f3fee5
MD
1605 read = (bp->b_cmd == BUF_CMD_READ);
1606 format = (bp->b_cmd == BUF_CMD_FORMAT);
984263bc
MD
1607 if (format) {
1608 finfo = (struct fd_formb *)bp->b_data;
1609 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1610 - (char *)finfo;
1611 }
1612 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
54078292
MD
1613 blknum = (unsigned)(bio->bio_offset / fdblk) +
1614 fd->skip /fdblk;
984263bc
MD
1615 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1616 }
1617 TRACE1("fd%d", fdu);
1618 TRACE1("[%s]", fdstates[fdc->state]);
1619 TRACE1("(0x%x)", fd->flags);
e8b273ff 1620 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
984263bc
MD
1621 switch (fdc->state)
1622 {
1623 case DEVIDLE:
1624 case FINDWORK: /* we have found new work */
1625 fdc->retry = 0;
1626 fd->skip = 0;
1627 fdc->fd = fd;
1628 fdc->fdu = fdu;
1629 fdc->fdctl_wr(fdc, fd->ft->trans);
1630 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1631 /*******************************************************\
1632 * If the next drive has a motor startup pending, then *
1633 * it will start up in its own good time *
1634 \*******************************************************/
1635 if(fd->flags & FD_MOTOR_WAIT) {
1636 fdc->state = MOTORWAIT;
1637 return (0); /* come back later */
1638 }
1639 /*******************************************************\
1640 * Maybe if it's not starting, it SHOULD be starting *
1641 \*******************************************************/
1642 if (!(fd->flags & FD_MOTOR))
1643 {
1644 fdc->state = MOTORWAIT;
1645 fd_turnon(fd);
1646 return (0);
1647 }
1648 else /* at least make sure we are selected */
1649 {
1650 set_motor(fdc, fd->fdsu, TURNON);
1651 }
1652 if (fdc->flags & FDC_NEEDS_RESET) {
1653 fdc->state = RESETCTLR;
1654 fdc->flags &= ~FDC_NEEDS_RESET;
1655 } else
1656 fdc->state = DOSEEK;
1657 break;
1658 case DOSEEK:
1659 if (b_cylinder == (unsigned)fd->track)
1660 {
1661 fdc->state = SEEKCOMPLETE;
1662 break;
1663 }
1664 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1665 fd->fdsu, b_cylinder * fd->ft->steptrac,
1666 0))
1667 {
1668 /*
1669 * seek command not accepted, looks like
1670 * the FDC went off to the Saints...
1671 */
1672 fdc->retry = 6; /* try a reset */
1673 return(retrier(fdc));
1674 }
1675 fd->track = FD_NO_TRACK;
1676 fdc->state = SEEKWAIT;
1677 return(0); /* will return later */
1678 case SEEKWAIT:
1679 /* allow heads to settle */
4fc46503
JS
1680 callout_reset(&fdc->pseudointr_ch, hz / 16,
1681 fd_pseudointr, fdc);
984263bc
MD
1682 fdc->state = SEEKCOMPLETE;
1683 return(0); /* will return later */
1684 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1685 /* Make sure seek really happened*/
1686 if(fd->track == FD_NO_TRACK) {
1687 int descyl = b_cylinder * fd->ft->steptrac;
1688 do {
1689 /*
1690 * This might be a "ready changed" interrupt,
1691 * which cannot really happen since the
1692 * RDY pin is hardwired to + 5 volts. This
1693 * generally indicates a "bouncing" intr
1694 * line, so do one of the following:
1695 *
1696 * When running on an enhanced FDC that is
1697 * known to not go stuck after responding
1698 * with INVALID, fetch all interrupt states
1699 * until seeing either an INVALID or a
1700 * real interrupt condition.
1701 *
1702 * When running on a dumb old NE765, give
1703 * up immediately. The controller will
1704 * provide up to four dummy RC interrupt
1705 * conditions right after reset (for the
1706 * corresponding four drives), so this is
1707 * our only chance to get notice that it
1708 * was not the FDC that caused the interrupt.
1709 */
1710 if (fd_sense_int(fdc, &st0, &cyl)
1711 == FD_NOT_VALID)
1712 return 0;
1713 if(fdc->fdct == FDC_NE765
1714 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1715 return 0; /* hope for a real intr */
1716 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1717
1718 if (0 == descyl) {
1719 int failed = 0;
1720 /*
1721 * seek to cyl 0 requested; make sure we are
1722 * really there
1723 */
1724 if (fd_sense_drive_status(fdc, &st3))
1725 failed = 1;
1726 if ((st3 & NE7_ST3_T0) == 0) {
e3869ec7 1727 kprintf(
984263bc
MD
1728 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1729 fdu, st3, NE7_ST3BITS);
1730 failed = 1;
1731 }
1732
1733 if (failed) {
1734 if(fdc->retry < 3)
1735 fdc->retry = 3;
1736 return (retrier(fdc));
1737 }
1738 }
1739
1740 if (cyl != descyl) {
e3869ec7 1741 kprintf(
984263bc
MD
1742 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1743 fdu, descyl, cyl, st0);
1744 if (fdc->retry < 3)
1745 fdc->retry = 3;
1746 return (retrier(fdc));
1747 }
1748 }
1749
1750 fd->track = b_cylinder;
10f3fee5
MD
1751 if (!(fdc->flags & FDC_NODMA)) {
1752 isa_dmastart(isa_dmabp(bp),
1753 bp->b_data+fd->skip,
984263bc 1754 format ? bp->b_bcount : fdblk, fdc->dmachan);
10f3fee5 1755 }
984263bc
MD
1756 sectrac = fd->ft->sectrac;
1757 sec = blknum % (sectrac * fd->ft->heads);
1758 head = sec / sectrac;
1759 sec = sec % sectrac + 1;
1760 fd->hddrv = ((head&1)<<2)+fdu;
1761
1762 if(format || !read)
1763 {
1764 /* make sure the drive is writable */
1765 if(fd_sense_drive_status(fdc, &st3) != 0)
1766 {
1767 /* stuck controller? */
1768 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1769 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1770 bp->b_data + fd->skip,
1771 format ? bp->b_bcount : fdblk,
1772 fdc->dmachan);
1773 fdc->retry = 6; /* reset the beast */
1774 return (retrier(fdc));
1775 }
1776 if(st3 & NE7_ST3_WP)
1777 {
1778 /*
1779 * XXX YES! this is ugly.
1780 * in order to force the current operation
1781 * to fail, we will have to fake an FDC
1782 * error - all error handling is done
1783 * by the retrier()
1784 */
1785 fdc->status[0] = NE7_ST0_IC_AT;
1786 fdc->status[1] = NE7_ST1_NW;
1787 fdc->status[2] = 0;
1788 fdc->status[3] = fd->track;
1789 fdc->status[4] = head;
1790 fdc->status[5] = sec;
1791 fdc->retry = 8; /* break out immediately */
1792 fdc->state = IOTIMEDOUT; /* not really... */
1793 return (1);
1794 }
1795 }
1796
1797 if (format) {
1798 if (fdc->flags & FDC_NODMA) {
1799 /*
1800 * This seems to be necessary for
1801 * whatever obscure reason; if we omit
1802 * it, we end up filling the sector ID
1803 * fields of the newly formatted track
1804 * entirely with garbage, causing
1805 * `wrong cylinder' errors all over
1806 * the place when trying to read them
1807 * back.
1808 *
1809 * Umpf.
1810 */
1811 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1812
10f3fee5 1813 (void)fdcpio(fdc,bp->b_cmd,
984263bc
MD
1814 bp->b_data+fd->skip,
1815 bp->b_bcount);
1816
1817 }
1818 /* formatting */
1819 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1820 finfo->fd_formb_secshift,
1821 finfo->fd_formb_nsecs,
1822 finfo->fd_formb_gaplen,
1823 finfo->fd_formb_fillbyte, 0)) {
1824 /* controller fell over */
1825 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1826 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1827 bp->b_data + fd->skip,
1828 format ? bp->b_bcount : fdblk,
1829 fdc->dmachan);
1830 fdc->retry = 6;
1831 return (retrier(fdc));
1832 }
1833 } else {
1834 if (fdc->flags & FDC_NODMA) {
1835 /*
1836 * this seems to be necessary even when
1837 * reading data
1838 */
1839 SET_BCDR(fdc, 1, fdblk, 0);
1840
1841 /*
1842 * perform the write pseudo-DMA before
1843 * the WRITE command is sent
1844 */
1845 if (!read)
10f3fee5 1846 (void)fdcpio(fdc,bp->b_cmd,
984263bc
MD
1847 bp->b_data+fd->skip,
1848 fdblk);
1849 }
1850 if (fd_cmd(fdc, 9,
1851 (read ? NE7CMD_READ : NE7CMD_WRITE),
1852 head << 2 | fdu, /* head & unit */
1853 fd->track, /* track */
1854 head,
1855 sec, /* sector + 1 */
1856 fd->ft->secsize, /* sector size */
1857 sectrac, /* sectors/track */
1858 fd->ft->gap, /* gap size */
1859 fd->ft->datalen, /* data length */
1860 0)) {
1861 /* the beast is sleeping again */
1862 if (!(fdc->flags & FDC_NODMA))
10f3fee5 1863 isa_dmadone(isa_dmabp(bp),
984263bc
MD
1864 bp->b_data + fd->skip,
1865 format ? bp->b_bcount : fdblk,
1866 fdc->dmachan);
1867 fdc->retry = 6;
1868 return (retrier(fdc));
1869 }
1870 }
1871 if (fdc->flags & FDC_NODMA)
1872 /*
1873 * if this is a read, then simply await interrupt
1874 * before performing PIO
1875 */
10f3fee5 1876 if (read && !fdcpio(fdc,bp->b_cmd,
984263bc 1877 bp->b_data+fd->skip,fdblk)) {
e8b273ff
MD
1878 callout_reset(&fd->tohandle, hz,
1879 fd_iotimeout, fdc);
984263bc
MD
1880 return(0); /* will return later */
1881 };
1882
1883 /*
1884 * write (or format) operation will fall through and
1885 * await completion interrupt
1886 */
1887 fdc->state = IOCOMPLETE;
e8b273ff 1888 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
984263bc
MD
1889 return (0); /* will return later */
1890 case PIOREAD:
1891 /*
1892 * actually perform the PIO read. The IOCOMPLETE case
1893 * removes the timeout for us.
1894 */
10f3fee5 1895 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
984263bc
MD
1896 fdc->state = IOCOMPLETE;
1897 /* FALLTHROUGH */
1898 case IOCOMPLETE: /* IO DONE, post-analyze */
e8b273ff 1899 callout_stop(&fd->tohandle);
984263bc
MD
1900
1901 if (fd_read_status(fdc, fd->fdsu)) {
10f3fee5
MD
1902 if (!(fdc->flags & FDC_NODMA)) {
1903 isa_dmadone(isa_dmabp(bp),
1904 bp->b_data + fd->skip,
984263bc
MD
1905 format ? bp->b_bcount : fdblk,
1906 fdc->dmachan);
10f3fee5 1907 }
984263bc
MD
1908 if (fdc->retry < 6)
1909 fdc->retry = 6; /* force a reset */
1910 return (retrier(fdc));
1911 }
1912
1913 fdc->state = IOTIMEDOUT;
1914
1915 /* FALLTHROUGH */
1916
1917 case IOTIMEDOUT:
10f3fee5
MD
1918 if (!(fdc->flags & FDC_NODMA)) {
1919 isa_dmadone(isa_dmabp(bp),
1920 bp->b_data + fd->skip,
984263bc 1921 format ? bp->b_bcount : fdblk, fdc->dmachan);
10f3fee5 1922 }
984263bc
MD
1923 if (fdc->status[0] & NE7_ST0_IC) {
1924 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1925 && fdc->status[1] & NE7_ST1_OR) {
1926 /*
1927 * DMA overrun. Someone hogged the bus and
1928 * didn't release it in time for the next
1929 * FDC transfer.
1930 *
1931 * We normally restart this without bumping
1932 * the retry counter. However, in case
1933 * something is seriously messed up (like
1934 * broken hardware), we rather limit the
1935 * number of retries so the IO operation
1936 * doesn't block indefinately.
1937 */
1938 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
1939 fdc->state = SEEKCOMPLETE;
1940 return (1);
1941 } /* else fall through */
1942 }
1943 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
1944 && fdc->retry < 6)
1945 fdc->retry = 6; /* force a reset */
1946 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1947 && fdc->status[2] & NE7_ST2_WC
1948 && fdc->retry < 3)
1949 fdc->retry = 3; /* force recalibrate */
1950 return (retrier(fdc));
1951 }
1952 /* All OK */
1953 /* Operation successful, retry DMA overruns again next time. */
1954 fdc->dma_overruns = 0;
1955 fd->skip += fdblk;
1956 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
1957 /* set up next transfer */
1958 fdc->state = DOSEEK;
1959 } else {
1960 /* ALL DONE */
1961 fd->skip = 0;
81b5c339 1962 fdc->bio = NULL;
984263bc
MD
1963 device_unbusy(fd->dev);
1964 devstat_end_transaction_buf(&fd->device_stats, bp);
81b5c339 1965 biodone(bio);
984263bc
MD
1966 fdc->fd = (fd_p) 0;
1967 fdc->fdu = -1;
1968 fdc->state = FINDWORK;
1969 }
1970 return (1);
1971 case RESETCTLR:
1972 fdc_reset(fdc);
1973 fdc->retry++;
1974 fdc->state = RESETCOMPLETE;
1975 return (0);
1976 case RESETCOMPLETE:
1977 /*
1978 * Discard all the results from the reset so that they
1979 * can't cause an unexpected interrupt later.
1980 */
1981 for (i = 0; i < 4; i++)
1982 (void)fd_sense_int(fdc, &st0, &cyl);
1983 fdc->state = STARTRECAL;
1984 /* Fall through. */
1985 case STARTRECAL:
1986 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
1987 /* arrgl */
1988 fdc->retry = 6;
1989 return (retrier(fdc));
1990 }
1991 fdc->state = RECALWAIT;
1992 return (0); /* will return later */
1993 case RECALWAIT:
1994 /* allow heads to settle */
4fc46503 1995 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
984263bc
MD
1996 fdc->state = RECALCOMPLETE;
1997 return (0); /* will return later */
1998 case RECALCOMPLETE:
1999 do {
2000 /*
2001 * See SEEKCOMPLETE for a comment on this:
2002 */
2003 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2004 return 0;
2005 if(fdc->fdct == FDC_NE765
2006 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2007 return 0; /* hope for a real intr */
2008 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2009 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2010 {
2011 if(fdc->retry > 3)
2012 /*
2013 * a recalibrate from beyond cylinder 77
2014 * will "fail" due to the FDC limitations;
2015 * since people used to complain much about
2016 * the failure message, try not logging
2017 * this one if it seems to be the first
2018 * time in a line
2019 */
e3869ec7 2020 kprintf("fd%d: recal failed ST0 %b cyl %d\n",
984263bc
MD
2021 fdu, st0, NE7_ST0BITS, cyl);
2022 if(fdc->retry < 3) fdc->retry = 3;
2023 return (retrier(fdc));
2024 }
2025 fd->track = 0;
2026 /* Seek (probably) necessary */
2027 fdc->state = DOSEEK;
2028 return (1); /* will return immediatly */
2029 case MOTORWAIT:
2030 if(fd->flags & FD_MOTOR_WAIT)
2031 {
2032 return (0); /* time's not up yet */
2033 }
2034 if (fdc->flags & FDC_NEEDS_RESET) {
2035 fdc->state = RESETCTLR;
2036 fdc->flags &= ~FDC_NEEDS_RESET;
2037 } else {
2038 /*
2039 * If all motors were off, then the controller was
2040 * reset, so it has lost track of the current
2041 * cylinder. Recalibrate to handle this case.
2042 * But first, discard the results of the reset.
2043 */
2044 fdc->state = RESETCOMPLETE;
2045 }
2046 return (1); /* will return immediatly */
2047 default:
2048 device_printf(fdc->fdc_dev, "unexpected FD int->");
2049 if (fd_read_status(fdc, fd->fdsu) == 0)
e3869ec7 2050 kprintf("FDC status :%x %x %x %x %x %x %x ",
984263bc
MD
2051 fdc->status[0],
2052 fdc->status[1],
2053 fdc->status[2],
2054 fdc->status[3],
2055 fdc->status[4],
2056 fdc->status[5],
2057 fdc->status[6] );
2058 else
e3869ec7 2059 kprintf("No status available ");
984263bc
MD
2060 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2061 {
e3869ec7 2062 kprintf("[controller is dead now]\n");
984263bc
MD
2063 return (0);
2064 }
e3869ec7 2065 kprintf("ST0 = %x, PCN = %x\n", st0, cyl);
984263bc
MD
2066 return (0);
2067 }
2068 /*XXX confusing: some branches return immediately, others end up here*/
2069 return (1); /* Come back immediatly to new state */
2070}
2071
2072static int
2073retrier(struct fdc_data *fdc)
2074{
81b5c339 2075 struct bio *bio;
3a1b0fdc 2076 struct buf *bp;
984263bc 2077 struct fd_data *fd;
b13267a5 2078 cdev_t dev;
984263bc
MD
2079 int fdu;
2080
81b5c339
MD
2081 bio = fdc->bio;
2082 bp = bio->bio_buf;
2083 dev = bio->bio_driver_info;
984263bc
MD
2084
2085 /* XXX shouldn't this be cached somewhere? */
81b5c339 2086 fdu = FDUNIT(minor(dev));
984263bc
MD
2087 fd = devclass_get_softc(fd_devclass, fdu);
2088 if (fd->options & FDOPT_NORETRY)
2089 goto fail;
2090
2091 switch (fdc->retry) {
2092 case 0: case 1: case 2:
2093 fdc->state = SEEKCOMPLETE;
2094 break;
2095 case 3: case 4: case 5:
2096 fdc->state = STARTRECAL;
2097 break;
2098 case 6:
2099 fdc->state = RESETCTLR;
2100 break;
2101 case 7:
2102 break;
2103 default:
2104 fail:
2105 {
2106 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
984263bc 2107
e4c9c0c8 2108 if (printerror) {
ee3ad2c9
MD
2109 /*
2110 * note: use the correct device for more
2111 * verbose error reporting.
2112 */
b13267a5 2113 cdev_t subdev;
ee3ad2c9 2114
81b5c339
MD
2115 subdev = make_sub_dev(dev,
2116 (FDUNIT(minor(dev))<<3)|RAW_PART);
2117 diskerr(bio, subdev,
ee3ad2c9 2118 "hard error", LOG_PRINTF,
54078292 2119 fdc->fd->skip, NULL);
e4c9c0c8 2120 }
984263bc
MD
2121 if (printerror) {
2122 if (fdc->flags & FDC_STAT_VALID)
e3869ec7 2123 kprintf(
984263bc
MD
2124 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2125 fdc->status[0], NE7_ST0BITS,
2126 fdc->status[1], NE7_ST1BITS,
2127 fdc->status[2], NE7_ST2BITS,
2128 fdc->status[3], fdc->status[4],
2129 fdc->status[5]);
2130 else
e3869ec7 2131 kprintf(" (No status)\n");
984263bc
MD
2132 }
2133 }
2134 bp->b_flags |= B_ERROR;
2135 bp->b_error = EIO;
2136 bp->b_resid += bp->b_bcount - fdc->fd->skip;
81b5c339 2137 fdc->bio = NULL;
984263bc
MD
2138 fdc->fd->skip = 0;
2139 device_unbusy(fd->dev);
2140 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
81b5c339 2141 biodone(bio);
984263bc
MD
2142 fdc->state = FINDWORK;
2143 fdc->flags |= FDC_NEEDS_RESET;
2144 fdc->fd = (fd_p) 0;
2145 fdc->fdu = -1;
2146 return (1);
2147 }
2148 fdc->retry++;
2149 return (1);
2150}
2151
014958fd
MD
2152static void
2153fdformat_wakeup(struct bio *bio)
2154{
2155 bio->bio_buf->b_cmd = BUF_CMD_DONE;
2156 wakeup(bio);
2157}
2158
984263bc 2159static int
b13267a5 2160fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred)
984263bc
MD
2161{
2162 fdu_t fdu;
2163 fd_p fd;
984263bc 2164 struct buf *bp;
fbe276c7 2165 int rv = 0;
984263bc
MD
2166 size_t fdblk;
2167
2168 fdu = FDUNIT(minor(dev));
2169 fd = devclass_get_softc(fd_devclass, fdu);
2170 fdblk = 128 << fd->ft->secsize;
2171
2172 /* set up a buffer header for fdstrategy() */
014958fd 2173 bp = getpbuf(NULL);
10f3fee5 2174 bp->b_cmd = BUF_CMD_FORMAT;
984263bc
MD
2175
2176 /*
2177 * calculate a fake blkno, so fdstrategy() would initiate a
2178 * seek to the requested cylinder
2179 */
54078292
MD
2180 bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
2181 (fd->ft->sectrac * fd->ft->heads)
2182 + finfo->head * fd->ft->sectrac) * fdblk;
81b5c339 2183 bp->b_bio1.bio_driver_info = dev;
014958fd 2184 bp->b_bio1.bio_done = fdformat_wakeup;
984263bc
MD
2185
2186 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2187 bp->b_data = (caddr_t)finfo;
2188
2189 /* now do the format */
81b5c339 2190 dev_dstrategy(dev, &bp->b_bio1);
984263bc
MD
2191
2192 /* ...and wait for it to complete */
fbe276c7 2193 crit_enter();
10f3fee5 2194 while (bp->b_cmd != BUF_CMD_DONE) {
014958fd 2195 rv = tsleep(&bp->b_bio1, 0, "fdform", 20 * hz);
984263bc
MD
2196 if (rv == EWOULDBLOCK)
2197 break;
2198 }
fbe276c7 2199 crit_exit();
984263bc
MD
2200
2201 if (rv == EWOULDBLOCK) {
2202 /* timed out */
2203 rv = EIO;
2204 device_unbusy(fd->dev);
81b5c339 2205 biodone(&bp->b_bio1);
984263bc
MD
2206 }
2207 if (bp->b_flags & B_ERROR)
2208 rv = bp->b_error;
2209 /*
2210 * allow the process to be swapped
2211 */
014958fd 2212 relpbuf(bp, NULL);
984263bc
MD
2213 return rv;
2214}
2215
2216/*
2217 * TODO: don't allocate buffer on stack.
2218 */
2219
2220static int
fef8985e 2221fdioctl(struct dev_ioctl_args *ap)
984263bc 2222{
b13267a5 2223 cdev_t dev = ap->a_head.a_dev;
984263bc
MD
2224 fdu_t fdu = FDUNIT(minor(dev));
2225 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2226 size_t fdblk;
2227
2228 struct fd_type *fdt;
2229 struct disklabel *dl;
2230 struct fdc_status *fsp;
2231 char buffer[DEV_BSIZE];
2232 int error = 0;
2233
2234 fdblk = 128 << fd->ft->secsize;
2235
fef8985e 2236 switch (ap->a_cmd) {
984263bc
MD
2237 case DIOCGDINFO:
2238 bzero(buffer, sizeof (buffer));
2239 dl = (struct disklabel *)buffer;
2240 dl->d_secsize = fdblk;
2241 fdt = fd->ft;
2242 dl->d_secpercyl = fdt->size / fdt->tracks;
2243 dl->d_type = DTYPE_FLOPPY;
2244
2245 if (readdisklabel(dev, dl)
2246 == NULL)
2247 error = 0;
2248 else
2249 error = EINVAL;
2250
fef8985e 2251 *(struct disklabel *)ap->a_data = *dl;
984263bc
MD
2252 break;
2253
2254 case DIOCSDINFO:
fef8985e 2255 if ((ap->a_fflag & FWRITE) == 0)
984263bc
MD
2256 error = EBADF;
2257 break;
2258
2259 case DIOCWLABEL:
fef8985e 2260 if ((ap->a_fflag & FWRITE) == 0)
984263bc
MD
2261 error = EBADF;
2262 break;
2263
2264 case DIOCWDINFO:
fef8985e 2265 if ((ap->a_fflag & FWRITE) == 0) {
984263bc
MD
2266 error = EBADF;
2267 break;
2268 }
2269
fef8985e 2270 dl = (struct disklabel *)ap->a_data;
984263bc
MD
2271
2272 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2273 (u_long)0)) != 0)
2274 break;
2275
2276 error = writedisklabel(dev, (struct disklabel *)buffer);
2277 break;
2278 case FD_FORM:
fef8985e 2279 if ((ap->a_fflag & FWRITE) == 0)
984263bc 2280 error = EBADF; /* must be opened for writing */
fef8985e 2281 else if (((struct fd_formb *)ap->a_data)->format_version !=
984263bc
MD
2282 FD_FORMAT_VERSION)
2283 error = EINVAL; /* wrong version of formatting prog */
2284 else
fef8985e 2285 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred);
984263bc
MD
2286 break;
2287
2288 case FD_GTYPE: /* get drive type */
fef8985e 2289 *(struct fd_type *)ap->a_data = *fd->ft;
984263bc
MD
2290 break;
2291
2292 case FD_STYPE: /* set drive type */
2293 /* this is considered harmful; only allow for superuser */
fef8985e 2294 if (suser_cred(ap->a_cred, 0) != 0)
984263bc 2295 return EPERM;
fef8985e 2296 *fd->ft = *(struct fd_type *)ap->a_data;
984263bc
MD
2297 break;
2298
2299 case FD_GOPTS: /* get drive options */
fef8985e 2300 *(int *)ap->a_data = fd->options;
984263bc
MD
2301 break;
2302
2303 case FD_SOPTS: /* set drive options */
fef8985e 2304 fd->options = *(int *)ap->a_data;
984263bc
MD
2305 break;
2306
2307 case FD_GSTAT:
fef8985e 2308 fsp = (struct fdc_status *)ap->a_data;
984263bc
MD
2309 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2310 return EINVAL;
2311 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2312 break;
2313
2314 default:
2315 error = ENOTTY;
2316 break;
2317 }
2318 return (error);
2319}
2320
2321/*
2322 * Hello emacs, these are the
2323 * Local Variables:
2324 * c-indent-level: 8
2325 * c-continued-statement-offset: 8
2326 * c-continued-brace-offset: 0
2327 * c-brace-offset: -8
2328 * c-brace-imaginary-offset: 0
2329 * c-argdecl-indent: 8
2330 * c-label-offset: -8
2331 * c++-hanging-braces: 1
2332 * c++-access-specifier-offset: -8
2333 * c++-empty-arglist-indent: 8
2334 * c++-friend-offset: 0
2335 * End:
2336 */