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kernel - Order ipfw3 module before other ipfw3_* modules
[dragonfly.git] / sys / dev / disk / fd / fd.c
blob69003dce49caef24a00f04d6708af5b807d1a9f0
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 $
54 *
55 */
56
57 #include "opt_fdc.h"
58
59 #include <sys/param.h>
60 #include <sys/systm.h>
61 #include <sys/kernel.h>
62 #include <sys/buf.h>
63 #include <sys/bus.h>
64 #include <sys/conf.h>
65 #include <sys/diskslice.h>
66 #include <sys/disk.h>
67 #include <sys/devicestat.h>
68 #include <sys/fcntl.h>
69 #include <sys/malloc.h>
70 #include <sys/module.h>
71 #include <sys/proc.h>
72 #include <sys/priv.h>
73 #include <sys/syslog.h>
74 #include <sys/device.h>
75 #include <sys/rman.h>
76 #include <sys/buf2.h>
77 #include <sys/thread2.h>
78
79 #include <machine/clock.h>
80 #include <machine/inttypes.h>
81 #include <machine/ioctl_fd.h>
82 #include <machine/stdarg.h>
83
84 #include <bus/isa/isavar.h>
85 #include <bus/isa/isareg.h>
86 #include "fdreg.h"
87 #include "fdc.h"
88 #include <bus/isa/rtc.h>
89
90 /* configuration flags */
91 #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
92 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
93
94 /* internally used only, not really from CMOS: */
95 #define RTCFDT_144M_PRETENDED 0x1000
96
97 /* error returns for fd_cmd() */
98 #define FD_FAILED -1
99 #define FD_NOT_VALID -2
100 #define FDC_ERRMAX 100 /* do not log more */
101 /*
102 * Stop retrying after this many DMA overruns. Since each retry takes
103 * one revolution, with 300 rpm., 25 retries take approximately 10
104 * seconds which the read attempt will block in case the DMA overrun
105 * is persistent.
106 */
107 #define FDC_DMAOV_MAX 25
108
109 /*
110 * Timeout value for the PIO loops to wait until the FDC main status
111 * register matches our expectations (request for master, direction
112 * bit). This is supposed to be a number of microseconds, although
113 * timing might actually not be very accurate.
114 *
115 * Timeouts of 100 msec are believed to be required for some broken
116 * (old) hardware.
117 */
118 #define FDSTS_TIMEOUT 100000
119
120 #define NUMTYPES 17
121 #define NUMDENS (NUMTYPES - 7)
122
123 /* These defines (-1) must match index for fd_types */
124 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
125 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */
126 #define FD_1720 1
127 #define FD_1480 2
128 #define FD_1440 3
129 #define FD_1200 4
130 #define FD_820 5
131 #define FD_800 6
132 #define FD_720 7
133 #define FD_360 8
134 #define FD_640 9
135 #define FD_1232 10
136
137 #define FD_1480in5_25 11
138 #define FD_1440in5_25 12
139 #define FD_820in5_25 13
140 #define FD_800in5_25 14
141 #define FD_720in5_25 15
142 #define FD_360in5_25 16
143 #define FD_640in5_25 17
144
145
146 static struct fd_type fd_types[NUMTYPES] =
147 {
148 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
149 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
150 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
151 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
152 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
153 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
154 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
155 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
156 { 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
157 { 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
158
159 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
160 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
161 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
162 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
163 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
164 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
165 { 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
166 };
167
168 #define DRVS_PER_CTLR 2 /* 2 floppies */
169
170 /***********************************************************************\
171 * Per controller structure. *
172 \***********************************************************************/
173 devclass_t fdc_devclass;
174
175 /***********************************************************************\
176 * Per drive structure. *
177 * N per controller (DRVS_PER_CTLR) *
178 \***********************************************************************/
179 struct fd_data {
180 struct fdc_data *fdc; /* pointer to controller structure */
181 int fdsu; /* this units number on this controller */
182 int type; /* Drive type (FD_1440...) */
183 struct fd_type ft; /* the type descriptor */
184 int flags;
185 #define FD_OPEN 0x01 /* it's open */
186 #define FD_ACTIVE 0x02 /* it's active */
187 #define FD_MOTOR 0x04 /* motor should be on */
188 #define FD_MOTOR_WAIT 0x08 /* motor coming up */
189 int skip;
190 int hddrv;
191 #define FD_NO_TRACK -2
192 int track; /* where we think the head is */
193 int options; /* user configurable options, see ioctl_fd.h */
194 struct callout toffhandle;
195 struct callout tohandle;
196 struct callout motor;
197 struct disk disk;
198 struct devstat device_stats;
199 device_t dev;
200 fdu_t fdu;
201 };
202
203 struct fdc_ivars {
204 int fdunit;
205 };
206 static 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 */
218 static void fdc_intr(void *);
219 static void set_motor(struct fdc_data *, int, int);
220 # define TURNON 1
221 # define TURNOFF 0
222 static timeout_t fd_turnoff;
223 static timeout_t fd_motor_on;
224 static void fd_turnon(struct fd_data *);
225 static void fdc_reset(fdc_p);
226 static int fd_in(struct fdc_data *, int *);
227 static int out_fdc(struct fdc_data *, int);
228 static void fdstart(struct fdc_data *);
229 static timeout_t fd_iotimeout;
230 static timeout_t fd_pseudointr;
231 static int fdstate(struct fdc_data *);
232 static int retrier(struct fdc_data *);
233 static int fdformat(cdev_t, struct fd_formb *, struct ucred *);
234
235 static int enable_fifo(fdc_p fdc);
236
237 static 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
256 static 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 */
275 static int volatile fd_debug = 0;
276 #define TRACE0(arg) if(fd_debug) kprintf(arg)
277 #define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2)
278 #else /* FDC_DEBUG */
279 #define TRACE0(arg)
280 #define TRACE1(arg1, arg2)
281 #endif /* FDC_DEBUG */
282
283 void
284 fdout_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
289 static u_int8_t
290 fdsts_rd(fdc_p fdc)
291 {
292 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
293 }
294
295 static void
296 fddata_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
301 static u_int8_t
302 fddata_rd(fdc_p fdc)
303 {
304 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
305 }
306
307 static void
308 fdctl_wr_isa(fdc_p fdc, u_int8_t v)
309 {
310 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
311 }
312
313 #if 0
314
315 static u_int8_t
316 fdin_rd(fdc_p fdc)
317 {
318 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
319 }
320
321 #endif
322
323 static d_open_t Fdopen; /* NOTE, not fdopen */
324 static d_close_t fdclose;
325 static d_ioctl_t fdioctl;
326 static d_strategy_t fdstrategy;
327
328 static struct dev_ops fd_ops = {
329 { "fd", 0, 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,
336 };
337
338 static int
339 fdc_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 */
359 int
360 fd_cmd(struct fdc_data *fdc, int n_out, ...)
361 {
362 u_char cmd;
363 int n_in;
364 int n;
365 __va_list ap;
366
367 __va_start(ap, n_out);
368 cmd = (u_char)(__va_arg(ap, int));
369 __va_end(ap);
370 __va_start(ap, n_out);
371 for (n = 0; n < n_out; n++)
372 {
373 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
374 {
375 char msg[50];
376 ksnprintf(msg, sizeof(msg),
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 }
382 n_in = __va_arg(ap, int);
383 for (n = 0; n < n_in; n++)
384 {
385 int *ptr = __va_arg(ap, int *);
386 if (fd_in(fdc, ptr) < 0)
387 {
388 char msg[50];
389 ksnprintf(msg, sizeof(msg),
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
399 static int
400 enable_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
441 static int
442 fd_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
456 static int
457 fd_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
489 static int
490 fd_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
520 int
521 fdc_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 -1);
586 }
587
588 /*
589 * Now (finally!) allocate the control port.
590 */
591 fdc->rid_ctl = 1;
592 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
593 &fdc->rid_ctl,
594 0ul, ~0ul, 1, RF_ACTIVE);
595 if (fdc->res_ctl == 0) {
596 device_printf(dev,
597 "cannot reserve control I/O port range\n");
598 return ENXIO;
599 }
600 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
601 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
602 }
603
604 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
605 &fdc->rid_irq, 0ul, ~0ul, 1,
606 RF_ACTIVE);
607 if (fdc->res_irq == 0) {
608 device_printf(dev, "cannot reserve interrupt line\n");
609 return ENXIO;
610 }
611
612 if ((fdc->flags & FDC_NODMA) == 0) {
613 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
614 &fdc->rid_drq, 0ul, ~0ul, 1,
615 RF_ACTIVE);
616 if (fdc->res_drq == 0) {
617 device_printf(dev, "cannot reserve DMA request line\n");
618 return ENXIO;
619 }
620 fdc->dmachan = fdc->res_drq->r_start;
621 }
622
623 return 0;
624 }
625
626 void
627 fdc_release_resources(struct fdc_data *fdc)
628 {
629 device_t dev;
630
631 dev = fdc->fdc_dev;
632 if (fdc->res_irq != 0) {
633 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
634 fdc->res_irq);
635 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
636 fdc->res_irq);
637 }
638 if (fdc->res_ctl != 0) {
639 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
640 fdc->res_ctl);
641 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
642 fdc->res_ctl);
643 }
644 if (fdc->res_ioport != 0) {
645 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
646 fdc->res_ioport);
647 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
648 fdc->res_ioport);
649 }
650 if (fdc->res_drq != 0) {
651 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
652 fdc->res_drq);
653 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
654 fdc->res_drq);
655 }
656 }
657
658 /****************************************************************************/
659 /* autoconfiguration stuff */
660 /****************************************************************************/
661
662 static struct isa_pnp_id fdc_ids[] = {
663 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
664 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
665 {0}
666 };
667
668 int
669 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
670 {
671 struct fdc_ivars *ivars = device_get_ivars(child);
672
673 switch (which) {
674 case FDC_IVAR_FDUNIT:
675 *result = ivars->fdunit;
676 break;
677 default:
678 return ENOENT;
679 }
680 return 0;
681 }
682
683 /*
684 * fdc controller section.
685 */
686 static int
687 fdc_probe(device_t dev)
688 {
689 int error, ic_type;
690 struct fdc_data *fdc;
691
692 fdc = device_get_softc(dev);
693 bzero(fdc, sizeof *fdc);
694 fdc->fdc_dev = dev;
695 fdc->fdctl_wr = fdctl_wr_isa;
696
697 /* Check pnp ids */
698 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
699 if (error == ENXIO)
700 return ENXIO;
701 if (error == 0)
702 fdc->flags |= FDC_ISPNP;
703
704 /* Attempt to allocate our resources for the duration of the probe */
705 error = fdc_alloc_resources(fdc);
706 if (error)
707 goto out;
708
709 /* First - lets reset the floppy controller */
710 fdout_wr(fdc, 0);
711 DELAY(100);
712 fdout_wr(fdc, FDO_FRST);
713
714 /* see if it can handle a command */
715 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
716 NE7_SPEC_2(2, 0), 0)) {
717 error = ENXIO;
718 goto out;
719 }
720
721 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
722 ic_type = (u_char)ic_type;
723 switch (ic_type) {
724 case 0x80:
725 device_set_desc(dev, "NEC 765 or clone");
726 fdc->fdct = FDC_NE765;
727 break;
728 case 0x81:
729 device_set_desc(dev, "Intel 82077 or clone");
730 fdc->fdct = FDC_I82077;
731 break;
732 case 0x90:
733 device_set_desc(dev, "NEC 72065B or clone");
734 fdc->fdct = FDC_NE72065;
735 break;
736 default:
737 device_set_desc(dev, "generic floppy controller");
738 fdc->fdct = FDC_UNKNOWN;
739 break;
740 }
741 }
742
743 out:
744 fdc_release_resources(fdc);
745 return (error);
746 }
747
748 /*
749 * Add a child device to the fdc controller. It will then be probed etc.
750 */
751 static void
752 fdc_add_child(device_t dev, const char *name, int unit)
753 {
754 int disabled;
755 struct fdc_ivars *ivar;
756 device_t child;
757
758 ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
759 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
760 ivar->fdunit = 0;
761 child = device_add_child(dev, name, unit);
762 if (child == NULL)
763 return;
764 device_set_ivars(child, ivar);
765 if (resource_int_value(name, unit, "disabled", &disabled) == 0
766 && disabled != 0)
767 device_disable(child);
768 }
769
770 int
771 fdc_attach(device_t dev)
772 {
773 struct fdc_data *fdc;
774 int i, error;
775
776 fdc = device_get_softc(dev);
777
778 callout_init(&fdc->pseudointr_ch);
779
780 error = fdc_alloc_resources(fdc);
781 if (error) {
782 device_printf(dev, "cannot reacquire resources\n");
783 return error;
784 }
785 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
786 0, fdc_intr, fdc,
787 &fdc->fdc_intr, NULL, NULL);
788 if (error) {
789 device_printf(dev, "cannot setup interrupt\n");
790 return error;
791 }
792 fdc->fdcu = device_get_unit(dev);
793 fdc->flags |= FDC_ATTACHED;
794
795 if ((fdc->flags & FDC_NODMA) == 0) {
796 /* Acquire the DMA channel forever, The driver will do the rest */
797 /* XXX should integrate with rman */
798 isa_dma_acquire(fdc->dmachan);
799 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
800 }
801 fdc->state = DEVIDLE;
802
803 /* reset controller, turn motor off, clear fdout mirror reg */
804 fdout_wr(fdc, ((fdc->fdout = 0)));
805 bioq_init(&fdc->bio_queue);
806
807 /*
808 * Probe and attach any children. We should probably detect
809 * devices from the BIOS unless overridden.
810 */
811 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
812 i != -1;
813 i = resource_query_string(i, "at", device_get_nameunit(dev)))
814 fdc_add_child(dev, resource_query_name(i),
815 resource_query_unit(i));
816
817 return (bus_generic_attach(dev));
818 }
819
820 int
821 fdc_print_child(device_t me, device_t child)
822 {
823 int retval = 0;
824
825 retval += bus_print_child_header(me, child);
826 retval += kprintf(" on %s drive %d\n", device_get_nameunit(me),
827 fdc_get_fdunit(child));
828
829 return (retval);
830 }
831
832 static device_method_t fdc_methods[] = {
833 /* Device interface */
834 DEVMETHOD(device_probe, fdc_probe),
835 DEVMETHOD(device_attach, fdc_attach),
836 DEVMETHOD(device_detach, bus_generic_detach),
837 DEVMETHOD(device_shutdown, bus_generic_shutdown),
838 DEVMETHOD(device_suspend, bus_generic_suspend),
839 DEVMETHOD(device_resume, bus_generic_resume),
840
841 /* Bus interface */
842 DEVMETHOD(bus_print_child, fdc_print_child),
843 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
844 /* Our children never use any other bus interface methods. */
845
846 DEVMETHOD_END
847 };
848
849 static driver_t fdc_driver = {
850 "fdc",
851 fdc_methods,
852 sizeof(struct fdc_data)
853 };
854
855 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, NULL, NULL);
856 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, NULL, NULL);
857
858 /******************************************************************/
859 /*
860 * devices attached to the controller section.
861 */
862 static int
863 fd_probe(device_t dev)
864 {
865 int i;
866 u_int fdt, st0, st3;
867 struct fd_data *fd;
868 struct fdc_data *fdc;
869 fdsu_t fdsu;
870 static int fd_fifo = 0;
871
872 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
873 fd = device_get_softc(dev);
874 fdc = device_get_softc(device_get_parent(dev));
875
876 bzero(fd, sizeof *fd);
877 fd->dev = dev;
878 fd->fdc = fdc;
879 fd->fdsu = fdsu;
880 fd->fdu = device_get_unit(dev);
881
882 #ifdef __i386__
883 /* look up what bios thinks we have */
884 switch (fd->fdu) {
885 case 0:
886 if ((fdc->flags & FDC_ISPCMCIA))
887 fdt = RTCFDT_144M;
888 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
889 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
890 else
891 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
892 break;
893 case 1:
894 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
895 break;
896 default:
897 fdt = RTCFDT_NONE;
898 break;
899 }
900 #else
901 fdt = RTCFDT_144M; /* XXX probably */
902 #endif
903
904 /* is there a unit? */
905 if (fdt == RTCFDT_NONE)
906 return (ENXIO);
907
908 /* select it */
909 set_motor(fdc, fdsu, TURNON);
910 DELAY(1000000); /* 1 sec */
911
912 /* XXX This doesn't work before the first set_motor() */
913 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
914 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
915 && enable_fifo(fdc) == 0) {
916 device_printf(device_get_parent(dev),
917 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
918 }
919 fd_fifo = 1;
920
921 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
922 && (st3 & NE7_ST3_T0)) {
923 /* if at track 0, first seek inwards */
924 /* seek some steps: */
925 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
926 DELAY(300000); /* ...wait a moment... */
927 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
928 }
929
930 /* If we're at track 0 first seek inwards. */
931 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
932 /* Seek some steps... */
933 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
934 /* ...wait a moment... */
935 DELAY(300000);
936 /* make ctrlr happy: */
937 fd_sense_int(fdc, 0, 0);
938 }
939 }
940
941 for (i = 0; i < 2; i++) {
942 /*
943 * we must recalibrate twice, just in case the
944 * heads have been beyond cylinder 76, since most
945 * FDCs still barf when attempting to recalibrate
946 * more than 77 steps
947 */
948 /* go back to 0: */
949 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
950 /* a second being enough for full stroke seek*/
951 DELAY(i == 0 ? 1000000 : 300000);
952
953 /* anything responding? */
954 if (fd_sense_int(fdc, &st0, 0) == 0 &&
955 (st0 & NE7_ST0_EC) == 0)
956 break; /* already probed succesfully */
957 }
958 }
959
960 set_motor(fdc, fdsu, TURNOFF);
961
962 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
963 return (ENXIO);
964
965 fd->track = FD_NO_TRACK;
966 fd->fdc = fdc;
967 fd->fdsu = fdsu;
968 fd->options = 0;
969 callout_init(&fd->toffhandle);
970 callout_init(&fd->tohandle);
971 callout_init(&fd->motor);
972
973 switch (fdt) {
974 case RTCFDT_12M:
975 device_set_desc(dev, "1200-KB 5.25\" drive");
976 fd->type = FD_1200;
977 break;
978 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
979 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
980 fd->type = FD_1440;
981 break;
982 case RTCFDT_144M:
983 device_set_desc(dev, "1440-KB 3.5\" drive");
984 fd->type = FD_1440;
985 break;
986 case RTCFDT_288M:
987 case RTCFDT_288M_1:
988 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
989 fd->type = FD_1440;
990 break;
991 case RTCFDT_360K:
992 device_set_desc(dev, "360-KB 5.25\" drive");
993 fd->type = FD_360;
994 break;
995 case RTCFDT_720K:
996 kprintf("720-KB 3.5\" drive");
997 fd->type = FD_720;
998 break;
999 default:
1000 return (ENXIO);
1001 }
1002 fd->ft = fd_types[fd->type - 1];
1003 return (0);
1004 }
1005
1006 static int
1007 fd_attach(device_t dev)
1008 {
1009 struct disk_info info;
1010 struct fd_data *fd;
1011 struct fd_type *ft;
1012
1013 fd = device_get_softc(dev);
1014
1015 disk_create(fd->fdu, &fd->disk, &fd_ops);
1016 disk_setdisktype(&fd->disk, "floppy");
1017
1018 /*
1019 * Make special raw floppy devices with preset types to
1020 * make formatting easier. These override the disk management
1021 * layer for the whole-slice-disk for partitions 128-191. Note
1022 * that we do not override partition 255, which is the
1023 * whole-slice-part. If we did we would have to provide our
1024 * own DIOCGPART ioctl.
1025 */
1026 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 1),
1027 UID_ROOT, GID_WHEEL, 0600, "fd%d.1720", fd->fdu);
1028 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 2),
1029 UID_ROOT, GID_WHEEL, 0600, "fd%d.1480", fd->fdu);
1030 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 3),
1031 UID_ROOT, GID_WHEEL, 0600, "fd%d.1440", fd->fdu);
1032 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 4),
1033 UID_ROOT, GID_WHEEL, 0600, "fd%d.1200", fd->fdu);
1034 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 5),
1035 UID_ROOT, GID_WHEEL, 0600, "fd%d.820", fd->fdu);
1036 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 6),
1037 UID_ROOT, GID_WHEEL, 0600, "fd%d.800", fd->fdu);
1038 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 7),
1039 UID_ROOT, GID_WHEEL, 0600, "fd%d.720", fd->fdu);
1040 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 8),
1041 UID_ROOT, GID_WHEEL, 0600, "fd%d.360", fd->fdu);
1042 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 9),
1043 UID_ROOT, GID_WHEEL, 0600, "fd%d.640", fd->fdu);
1044 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 10),
1045 UID_ROOT, GID_WHEEL, 0600, "fd%d.1232", fd->fdu);
1046
1047 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1048 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1049 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1050 DEVSTAT_PRIORITY_FD);
1051
1052 if (fd->type != NO_TYPE) {
1053 bzero(&info, sizeof(info));
1054 ft = &fd_types[fd->type - 1];
1055 info.d_media_blksize = 128 << ft->secsize;
1056 info.d_media_blocks = ft->size;
1057 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1058 info.d_nheads = ft->heads;
1059 info.d_secpertrack = ft->sectrac;
1060 info.d_secpercyl = ft->sectrac * ft->heads;
1061 info.d_ncylinders = ft->size / info.d_secpercyl;
1062 disk_setdiskinfo(&fd->disk, &info);
1063 }
1064 return (0);
1065 }
1066
1067 static int
1068 fd_detach(device_t dev)
1069 {
1070 struct fd_data *fd;
1071
1072 fd = device_get_softc(dev);
1073 kprintf("devfs: Please make sure that only the right fd device was removed!!!\n");
1074 dev_ops_remove_minor(&fd_ops,
1075 /*dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),*/
1076 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128));
1077 disk_invalidate(&fd->disk);
1078 disk_destroy(&fd->disk);
1079 devstat_remove_entry(&fd->device_stats);
1080 callout_stop(&fd->toffhandle);
1081 callout_stop(&fd->motor);
1082
1083 return (0);
1084 }
1085
1086 static device_method_t fd_methods[] = {
1087 /* Device interface */
1088 DEVMETHOD(device_probe, fd_probe),
1089 DEVMETHOD(device_attach, fd_attach),
1090 DEVMETHOD(device_detach, fd_detach),
1091 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1092 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1093 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1094
1095 DEVMETHOD_END
1096 };
1097
1098 static driver_t fd_driver = {
1099 "fd",
1100 fd_methods,
1101 sizeof(struct fd_data)
1102 };
1103
1104 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, NULL, NULL);
1105
1106 /****************************************************************************/
1107 /* motor control stuff */
1108 /* remember to not deselect the drive we're working on */
1109 /****************************************************************************/
1110 static void
1111 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1112 {
1113 int fdout = fdc->fdout;
1114 int needspecify = 0;
1115
1116 if(turnon) {
1117 fdout &= ~FDO_FDSEL;
1118 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1119 } else
1120 fdout &= ~(FDO_MOEN0 << fdsu);
1121
1122 if(!turnon
1123 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1124 /* gonna turn off the last drive, put FDC to bed */
1125 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1126 else {
1127 /* make sure controller is selected and specified */
1128 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1129 needspecify = 1;
1130 fdout |= (FDO_FRST|FDO_FDMAEN);
1131 }
1132
1133 fdout_wr(fdc, fdout);
1134 fdc->fdout = fdout;
1135 TRACE1("[0x%x->FDOUT]", fdout);
1136
1137 if (needspecify) {
1138 /*
1139 * XXX
1140 * special case: since we have just woken up the FDC
1141 * from its sleep, we silently assume the command will
1142 * be accepted, and do not test for a timeout
1143 */
1144 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1145 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1146 0);
1147 if (fdc->flags & FDC_HAS_FIFO)
1148 (void) enable_fifo(fdc);
1149 }
1150 }
1151
1152 static void
1153 fd_turnoff(void *xfd)
1154 {
1155 fd_p fd = xfd;
1156
1157 TRACE1("[fd%d: turnoff]", fd->fdu);
1158
1159 crit_enter();
1160 /*
1161 * Don't turn off the motor yet if the drive is active.
1162 *
1163 * If we got here, this could only mean we missed an interrupt.
1164 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1165 * after a controller reset. Just schedule a pseudo-interrupt
1166 * so the state machine gets re-entered.
1167 */
1168 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1169 fdc_intr(fd->fdc);
1170 crit_exit();
1171 return;
1172 }
1173
1174 fd->flags &= ~FD_MOTOR;
1175 set_motor(fd->fdc, fd->fdsu, TURNOFF);
1176 crit_exit();
1177 }
1178
1179 static void
1180 fd_motor_on(void *xfd)
1181 {
1182 fd_p fd = xfd;
1183
1184 crit_enter();
1185 fd->flags &= ~FD_MOTOR_WAIT;
1186 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1187 {
1188 fdc_intr(fd->fdc);
1189 }
1190 crit_exit();
1191 }
1192
1193 static void
1194 fd_turnon(fd_p fd)
1195 {
1196 if(!(fd->flags & FD_MOTOR))
1197 {
1198 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1199 set_motor(fd->fdc, fd->fdsu, TURNON);
1200 callout_reset(&fd->motor, hz, fd_motor_on, fd);
1201 }
1202 }
1203
1204 static void
1205 fdc_reset(fdc_p fdc)
1206 {
1207 /* Try a reset, keep motor on */
1208 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1209 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1210 DELAY(100);
1211 /* enable FDC, but defer interrupts a moment */
1212 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1213 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1214 DELAY(100);
1215 fdout_wr(fdc, fdc->fdout);
1216 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1217
1218 /* XXX after a reset, silently believe the FDC will accept commands */
1219 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1220 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1221 0);
1222 if (fdc->flags & FDC_HAS_FIFO)
1223 (void) enable_fifo(fdc);
1224 }
1225
1226 /****************************************************************************/
1227 /* fdc in/out */
1228 /****************************************************************************/
1229 /*
1230 * FDC IO functions, take care of the main status register, timeout
1231 * in case the desired status bits are never set.
1232 *
1233 * These PIO loops initially start out with short delays between
1234 * each iteration in the expectation that the required condition
1235 * is usually met quickly, so it can be handled immediately. After
1236 * about 1 ms, stepping is increased to achieve a better timing
1237 * accuracy in the calls to DELAY().
1238 */
1239 static int
1240 fd_in(struct fdc_data *fdc, int *ptr)
1241 {
1242 int i, j, step;
1243
1244 for (j = 0, step = 1;
1245 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1246 j < FDSTS_TIMEOUT;
1247 j += step) {
1248 if (i == NE7_RQM)
1249 return (fdc_err(fdc, "ready for output in input\n"));
1250 if (j == 1000)
1251 step = 1000;
1252 DELAY(step);
1253 }
1254 if (j >= FDSTS_TIMEOUT)
1255 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1256 #ifdef FDC_DEBUG
1257 i = fddata_rd(fdc);
1258 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1259 *ptr = i;
1260 return (0);
1261 #else /* !FDC_DEBUG */
1262 i = fddata_rd(fdc);
1263 if (ptr)
1264 *ptr = i;
1265 return (0);
1266 #endif /* FDC_DEBUG */
1267 }
1268
1269 static int
1270 out_fdc(struct fdc_data *fdc, int x)
1271 {
1272 int i, j, step;
1273
1274 for (j = 0, step = 1;
1275 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1276 j < FDSTS_TIMEOUT;
1277 j += step) {
1278 if (i == (NE7_DIO|NE7_RQM))
1279 return (fdc_err(fdc, "ready for input in output\n"));
1280 if (j == 1000)
1281 step = 1000;
1282 DELAY(step);
1283 }
1284 if (j >= FDSTS_TIMEOUT)
1285 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1286
1287 /* Send the command and return */
1288 fddata_wr(fdc, x);
1289 TRACE1("[0x%x->FDDATA]", x);
1290 return (0);
1291 }
1292
1293 /****************************************************************************/
1294 /* fdopen/fdclose */
1295 /****************************************************************************/
1296 int
1297 Fdopen(struct dev_open_args *ap)
1298 {
1299 cdev_t dev = ap->a_head.a_dev;
1300 fdu_t fdu = dkunit(dev);
1301 struct disk_info info;
1302 struct fd_type *ft;
1303 int type;
1304 int changetype;
1305 fd_p fd;
1306 fdc_p fdc;
1307
1308 /* check bounds */
1309 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1310 return (ENXIO);
1311 fdc = fd->fdc;
1312 if ((fdc == NULL) || (fd->type == NO_TYPE))
1313 return (ENXIO);
1314
1315 /*
1316 * Figure out the type of floppy. There are special whole-disk-device
1317 * overrides that will override the current type.
1318 */
1319 type = dkpart(dev);
1320 if (type == WHOLE_SLICE_PART) {
1321 type = fd->type; /* do not change selected type data */
1322 changetype = 0;
1323 } else if (type > 128) {
1324 type -= 128; /* set to specific format */
1325 changetype = 1;
1326 } else {
1327 type = fd->type; /* reset to default */
1328 changetype = 1;
1329 }
1330 if (type > NUMDENS)
1331 return (ENXIO);
1332 if (type != fd->type) {
1333 /*
1334 * For each type of basic drive, make sure we are trying
1335 * to open a type it can do,
1336 */
1337 switch (fd->type) {
1338 case FD_360:
1339 return (ENXIO);
1340 case FD_720:
1341 if ( type != FD_820
1342 && type != FD_800
1343 && type != FD_640
1344 )
1345 return (ENXIO);
1346 break;
1347 case FD_1200:
1348 switch (type) {
1349 case FD_1480:
1350 type = FD_1480in5_25;
1351 break;
1352 case FD_1440:
1353 type = FD_1440in5_25;
1354 break;
1355 case FD_1232:
1356 break;
1357 case FD_820:
1358 type = FD_820in5_25;
1359 break;
1360 case FD_800:
1361 type = FD_800in5_25;
1362 break;
1363 case FD_720:
1364 type = FD_720in5_25;
1365 break;
1366 case FD_640:
1367 type = FD_640in5_25;
1368 break;
1369 case FD_360:
1370 type = FD_360in5_25;
1371 break;
1372 default:
1373 return(ENXIO);
1374 }
1375 break;
1376 case FD_1440:
1377 if ( type != FD_1720
1378 && type != FD_1480
1379 && type != FD_1200
1380 && type != FD_820
1381 && type != FD_800
1382 && type != FD_720
1383 && type != FD_640
1384 )
1385 return(ENXIO);
1386 break;
1387 }
1388 }
1389
1390 /*
1391 * fd->type is the basic drive type, not the current format
1392 * we are reading. We only change the type when opening the
1393 * whole-slice-partition
1394 */
1395 if (changetype)
1396 fd->ft = fd_types[type - 1];
1397 fd->flags |= FD_OPEN;
1398
1399 /*
1400 * Clearing the DMA overrun counter at open time is a bit messy.
1401 * Since we're only managing one counter per controller, opening
1402 * the second drive could mess it up. Anyway, if the DMA overrun
1403 * condition is really persistent, it will eventually time out
1404 * still. OTOH, clearing it here will ensure we'll at least start
1405 * trying again after a previous (maybe even long ago) failure.
1406 * Also, this is merely a stop-gap measure only that should not
1407 * happen during normal operation, so we can tolerate it to be a
1408 * bit sloppy about this.
1409 */
1410 fdc->dma_overruns = 0;
1411
1412 /*
1413 * Set disk parameters for the disk management layer.
1414 *
1415 * Note that we do not set RAWEXTENSIONS here. We override
1416 * the minor numbers in the raw-extension range and handle them
1417 * directly.
1418 */
1419 bzero(&info, sizeof(info));
1420 ft = &fd->ft;
1421 info.d_media_blksize = 128 << ft->secsize;
1422 info.d_media_blocks = ft->size;
1423 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1424 info.d_nheads = ft->heads;
1425 info.d_secpertrack = ft->sectrac;
1426 info.d_secpercyl = ft->sectrac * ft->heads;
1427 info.d_ncylinders = ft->size / info.d_secpercyl;
1428 disk_setdiskinfo(&fd->disk, &info);
1429
1430 return 0;
1431 }
1432
1433 int
1434 fdclose(struct dev_close_args *ap)
1435 {
1436 cdev_t dev = ap->a_head.a_dev;
1437 fdu_t fdu = dkunit(dev);
1438 struct fd_data *fd;
1439
1440 fd = devclass_get_softc(fd_devclass, fdu);
1441 fd->flags &= ~FD_OPEN;
1442 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1443
1444 return (0);
1445 }
1446
1447 /****************************************************************************/
1448 /* fdstrategy */
1449 /****************************************************************************/
1450 int
1451 fdstrategy(struct dev_strategy_args *ap)
1452 {
1453 cdev_t dev = ap->a_head.a_dev;
1454 struct bio *bio = ap->a_bio;
1455 struct buf *bp = bio->bio_buf;
1456 unsigned nblocks, blknum, cando;
1457 fdu_t fdu;
1458 fdc_p fdc;
1459 fd_p fd;
1460 size_t fdblk;
1461
1462 fdu = dkunit(dev);
1463 fd = devclass_get_softc(fd_devclass, fdu);
1464 if (fd == 0)
1465 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1466 (u_long)major(dev), (u_long)minor(dev));
1467 fdc = fd->fdc;
1468 if (fd->type == NO_TYPE) {
1469 bp->b_error = ENXIO;
1470 bp->b_flags |= B_ERROR;
1471 goto bad;
1472 }
1473
1474 fdblk = 128 << (fd->ft.secsize);
1475 if (bp->b_cmd != BUF_CMD_FORMAT) {
1476 if (bio->bio_offset < 0) {
1477 kprintf(
1478 "fd%d: fdstrat: bad request offset = %"PRId64", bcount = %d\n",
1479 fdu, bio->bio_offset, bp->b_bcount);
1480 bp->b_error = EINVAL;
1481 bp->b_flags |= B_ERROR;
1482 goto bad;
1483 }
1484 if ((bp->b_bcount % fdblk) != 0) {
1485 bp->b_error = EINVAL;
1486 bp->b_flags |= B_ERROR;
1487 goto bad;
1488 }
1489 }
1490
1491 /*
1492 * Set up block calculations.
1493 */
1494 if (bio->bio_offset > 20000000LL * fdblk) {
1495 /*
1496 * Reject unreasonably high block number, prevent the
1497 * multiplication below from overflowing.
1498 */
1499 bp->b_error = EINVAL;
1500 bp->b_flags |= B_ERROR;
1501 goto bad;
1502 }
1503 blknum = (unsigned)(bio->bio_offset / fdblk);
1504 nblocks = fd->ft.size;
1505 bp->b_resid = 0;
1506 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1507 if (blknum <= nblocks) {
1508 cando = (nblocks - blknum) * fdblk;
1509 bp->b_resid = bp->b_bcount - cando;
1510 if (cando == 0)
1511 goto bad; /* not actually bad but EOF */
1512 } else {
1513 bp->b_error = EINVAL;
1514 bp->b_flags |= B_ERROR;
1515 goto bad;
1516 }
1517 }
1518 crit_enter();
1519 bio->bio_driver_info = dev;
1520 bioqdisksort(&fdc->bio_queue, bio);
1521 callout_stop(&fd->toffhandle);
1522
1523 /* Tell devstat we are starting on the transaction */
1524 devstat_start_transaction(&fd->device_stats);
1525 #if 0
1526 device_busy(fd->dev);
1527 #endif
1528 fdstart(fdc);
1529 crit_exit();
1530 return(0);
1531
1532 bad:
1533 biodone(bio);
1534 return(0);
1535 }
1536
1537 /***************************************************************\
1538 * fdstart *
1539 * We have just queued something.. if the controller is not busy *
1540 * then simulate the case where it has just finished a command *
1541 * So that it (the interrupt routine) looks on the queue for more*
1542 * work to do and picks up what we just added. *
1543 * If the controller is already busy, we need do nothing, as it *
1544 * will pick up our work when the present work completes *
1545 \***************************************************************/
1546 static void
1547 fdstart(struct fdc_data *fdc)
1548 {
1549 crit_enter();
1550 if(fdc->state == DEVIDLE)
1551 {
1552 fdc_intr(fdc);
1553 }
1554 crit_exit();
1555 }
1556
1557 static void
1558 fd_iotimeout(void *xfdc)
1559 {
1560 fdc_p fdc;
1561
1562 fdc = xfdc;
1563 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1564
1565 /*
1566 * Due to IBM's brain-dead design, the FDC has a faked ready
1567 * signal, hardwired to ready == true. Thus, any command
1568 * issued if there's no diskette in the drive will _never_
1569 * complete, and must be aborted by resetting the FDC.
1570 * Many thanks, Big Blue!
1571 * The FDC must not be reset directly, since that would
1572 * interfere with the state machine. Instead, pretend that
1573 * the command completed but was invalid. The state machine
1574 * will reset the FDC and retry once.
1575 */
1576 crit_enter();
1577 fdc->status[0] = NE7_ST0_IC_IV;
1578 fdc->flags &= ~FDC_STAT_VALID;
1579 fdc->state = IOTIMEDOUT;
1580 fdc_intr(fdc);
1581 crit_exit();
1582 }
1583
1584 /* just ensure it is running in a critical section */
1585 static void
1586 fd_pseudointr(void *xfdc)
1587 {
1588 crit_enter();
1589 fdc_intr(xfdc);
1590 crit_exit();
1591 }
1592
1593 /***********************************************************************\
1594 * fdintr *
1595 * keep calling the state machine until it returns a 0 *
1596 * ALWAYS called at SPLBIO *
1597 \***********************************************************************/
1598 static void
1599 fdc_intr(void *xfdc)
1600 {
1601 fdc_p fdc = xfdc;
1602 while(fdstate(fdc))
1603 ;
1604 }
1605
1606 /*
1607 * magic pseudo-DMA initialization for YE FDC. Sets count and
1608 * direction
1609 */
1610 #define SET_BCDR(fdc,wr,cnt,port) \
1611 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1612 ((cnt)-1) & 0xff); \
1613 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1614 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1615
1616 /*
1617 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1618 */
1619 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
1620 {
1621 u_char *cptr = (u_char *)addr;
1622
1623 if (cmd == BUF_CMD_READ) {
1624 if (fdc->state != PIOREAD) {
1625 fdc->state = PIOREAD;
1626 return(0);
1627 }
1628 SET_BCDR(fdc, 0, count, 0);
1629 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1630 FDC_YE_DATAPORT, cptr, count);
1631 } else {
1632 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1633 FDC_YE_DATAPORT, cptr, count);
1634 SET_BCDR(fdc, 0, count, 0);
1635 }
1636 return(1);
1637 }
1638
1639 /***********************************************************************\
1640 * The controller state machine. *
1641 * if it returns a non zero value, it should be called again immediatly *
1642 \***********************************************************************/
1643 static int
1644 fdstate(fdc_p fdc)
1645 {
1646 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1647 unsigned blknum = 0, b_cylinder = 0;
1648 fdu_t fdu;
1649 fd_p fd;
1650 struct bio *bio;
1651 struct buf *bp;
1652 struct fd_formb *finfo = NULL;
1653 size_t fdblk;
1654 cdev_t dev;
1655
1656 bio = fdc->bio;
1657 if (bio == NULL) {
1658 bio = bioq_first(&fdc->bio_queue);
1659 if (bio != NULL) {
1660 bioq_remove(&fdc->bio_queue, bio);
1661 fdc->bio = bio;
1662 }
1663 }
1664 if (bio == NULL) {
1665 /***********************************************\
1666 * nothing left for this controller to do *
1667 * Force into the IDLE state, *
1668 \***********************************************/
1669 fdc->state = DEVIDLE;
1670 if (fdc->fd) {
1671 device_printf(fdc->fdc_dev,
1672 "unexpected valid fd pointer\n");
1673 fdc->fd = (fd_p) 0;
1674 fdc->fdu = -1;
1675 }
1676 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1677 return (0);
1678 }
1679 bp = bio->bio_buf;
1680 dev = bio->bio_driver_info;
1681
1682 fdu = dkunit(dev);
1683 fd = devclass_get_softc(fd_devclass, fdu);
1684 fdblk = 128 << fd->ft.secsize;
1685 if (fdc->fd && (fd != fdc->fd))
1686 device_printf(fd->dev, "confused fd pointers\n");
1687 read = (bp->b_cmd == BUF_CMD_READ);
1688 format = (bp->b_cmd == BUF_CMD_FORMAT);
1689 if (format) {
1690 finfo = (struct fd_formb *)bp->b_data;
1691 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1692 - (char *)finfo;
1693 }
1694 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1695 blknum = (unsigned)(bio->bio_offset / fdblk) +
1696 fd->skip /fdblk;
1697 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads);
1698 }
1699 TRACE1("fd%d", fdu);
1700 TRACE1("[%s]", fdstates[fdc->state]);
1701 TRACE1("(0x%x)", fd->flags);
1702 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
1703 switch (fdc->state)
1704 {
1705 case DEVIDLE:
1706 case FINDWORK: /* we have found new work */
1707 fdc->retry = 0;
1708 fd->skip = 0;
1709 fdc->fd = fd;
1710 fdc->fdu = fdu;
1711 fdc->fdctl_wr(fdc, fd->ft.trans);
1712 TRACE1("[0x%x->FDCTL]", fd->ft.trans);
1713 /*******************************************************\
1714 * If the next drive has a motor startup pending, then *
1715 * it will start up in its own good time *
1716 \*******************************************************/
1717 if(fd->flags & FD_MOTOR_WAIT) {
1718 fdc->state = MOTORWAIT;
1719 return (0); /* come back later */
1720 }
1721 /*******************************************************\
1722 * Maybe if it's not starting, it SHOULD be starting *
1723 \*******************************************************/
1724 if (!(fd->flags & FD_MOTOR))
1725 {
1726 fdc->state = MOTORWAIT;
1727 fd_turnon(fd);
1728 return (0);
1729 }
1730 else /* at least make sure we are selected */
1731 {
1732 set_motor(fdc, fd->fdsu, TURNON);
1733 }
1734 if (fdc->flags & FDC_NEEDS_RESET) {
1735 fdc->state = RESETCTLR;
1736 fdc->flags &= ~FDC_NEEDS_RESET;
1737 } else
1738 fdc->state = DOSEEK;
1739 break;
1740 case DOSEEK:
1741 if (b_cylinder == (unsigned)fd->track)
1742 {
1743 fdc->state = SEEKCOMPLETE;
1744 break;
1745 }
1746 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1747 fd->fdsu, b_cylinder * fd->ft.steptrac,
1748 0))
1749 {
1750 /*
1751 * seek command not accepted, looks like
1752 * the FDC went off to the Saints...
1753 */
1754 fdc->retry = 6; /* try a reset */
1755 return(retrier(fdc));
1756 }
1757 fd->track = FD_NO_TRACK;
1758 fdc->state = SEEKWAIT;
1759 return(0); /* will return later */
1760 case SEEKWAIT:
1761 /* allow heads to settle */
1762 callout_reset(&fdc->pseudointr_ch, hz / 16,
1763 fd_pseudointr, fdc);
1764 fdc->state = SEEKCOMPLETE;
1765 return(0); /* will return later */
1766 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1767 /* Make sure seek really happened*/
1768 if(fd->track == FD_NO_TRACK) {
1769 int descyl = b_cylinder * fd->ft.steptrac;
1770 do {
1771 /*
1772 * This might be a "ready changed" interrupt,
1773 * which cannot really happen since the
1774 * RDY pin is hardwired to + 5 volts. This
1775 * generally indicates a "bouncing" intr
1776 * line, so do one of the following:
1777 *
1778 * When running on an enhanced FDC that is
1779 * known to not go stuck after responding
1780 * with INVALID, fetch all interrupt states
1781 * until seeing either an INVALID or a
1782 * real interrupt condition.
1783 *
1784 * When running on a dumb old NE765, give
1785 * up immediately. The controller will
1786 * provide up to four dummy RC interrupt
1787 * conditions right after reset (for the
1788 * corresponding four drives), so this is
1789 * our only chance to get notice that it
1790 * was not the FDC that caused the interrupt.
1791 */
1792 if (fd_sense_int(fdc, &st0, &cyl)
1793 == FD_NOT_VALID)
1794 return 0;
1795 if(fdc->fdct == FDC_NE765
1796 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1797 return 0; /* hope for a real intr */
1798 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1799
1800 if (0 == descyl) {
1801 int failed = 0;
1802 /*
1803 * seek to cyl 0 requested; make sure we are
1804 * really there
1805 */
1806 if (fd_sense_drive_status(fdc, &st3))
1807 failed = 1;
1808 if ((st3 & NE7_ST3_T0) == 0) {
1809 kprintf(
1810 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1811 fdu, st3, NE7_ST3BITS);
1812 failed = 1;
1813 }
1814
1815 if (failed) {
1816 if(fdc->retry < 3)
1817 fdc->retry = 3;
1818 return (retrier(fdc));
1819 }
1820 }
1821
1822 if (cyl != descyl) {
1823 kprintf(
1824 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1825 fdu, descyl, cyl, st0);
1826 if (fdc->retry < 3)
1827 fdc->retry = 3;
1828 return (retrier(fdc));
1829 }
1830 }
1831
1832 fd->track = b_cylinder;
1833 if (!(fdc->flags & FDC_NODMA)) {
1834 isa_dmastart(isa_dmabp(bp),
1835 bp->b_data+fd->skip,
1836 format ? bp->b_bcount : fdblk, fdc->dmachan);
1837 }
1838 sectrac = fd->ft.sectrac;
1839 sec = blknum % (sectrac * fd->ft.heads);
1840 head = sec / sectrac;
1841 sec = sec % sectrac + 1;
1842 fd->hddrv = ((head&1)<<2)+fdu;
1843
1844 if(format || !read)
1845 {
1846 /* make sure the drive is writable */
1847 if(fd_sense_drive_status(fdc, &st3) != 0)
1848 {
1849 /* stuck controller? */
1850 if (!(fdc->flags & FDC_NODMA))
1851 isa_dmadone(isa_dmabp(bp),
1852 bp->b_data + fd->skip,
1853 format ? bp->b_bcount : fdblk,
1854 fdc->dmachan);
1855 fdc->retry = 6; /* reset the beast */
1856 return (retrier(fdc));
1857 }
1858 if(st3 & NE7_ST3_WP)
1859 {
1860 /*
1861 * XXX YES! this is ugly.
1862 * in order to force the current operation
1863 * to fail, we will have to fake an FDC
1864 * error - all error handling is done
1865 * by the retrier()
1866 */
1867 fdc->status[0] = NE7_ST0_IC_AT;
1868 fdc->status[1] = NE7_ST1_NW;
1869 fdc->status[2] = 0;
1870 fdc->status[3] = fd->track;
1871 fdc->status[4] = head;
1872 fdc->status[5] = sec;
1873 fdc->retry = 8; /* break out immediately */
1874 fdc->state = IOTIMEDOUT; /* not really... */
1875 return (1);
1876 }
1877 }
1878
1879 if (format) {
1880 if (fdc->flags & FDC_NODMA) {
1881 /*
1882 * This seems to be necessary for
1883 * whatever obscure reason; if we omit
1884 * it, we end up filling the sector ID
1885 * fields of the newly formatted track
1886 * entirely with garbage, causing
1887 * `wrong cylinder' errors all over
1888 * the place when trying to read them
1889 * back.
1890 *
1891 * Umpf.
1892 */
1893 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1894
1895 (void)fdcpio(fdc,bp->b_cmd,
1896 bp->b_data+fd->skip,
1897 bp->b_bcount);
1898
1899 }
1900 /* formatting */
1901 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1902 finfo->fd_formb_secshift,
1903 finfo->fd_formb_nsecs,
1904 finfo->fd_formb_gaplen,
1905 finfo->fd_formb_fillbyte, 0)) {
1906 /* controller fell over */
1907 if (!(fdc->flags & FDC_NODMA))
1908 isa_dmadone(isa_dmabp(bp),
1909 bp->b_data + fd->skip,
1910 format ? bp->b_bcount : fdblk,
1911 fdc->dmachan);
1912 fdc->retry = 6;
1913 return (retrier(fdc));
1914 }
1915 } else {
1916 if (fdc->flags & FDC_NODMA) {
1917 /*
1918 * this seems to be necessary even when
1919 * reading data
1920 */
1921 SET_BCDR(fdc, 1, fdblk, 0);
1922
1923 /*
1924 * perform the write pseudo-DMA before
1925 * the WRITE command is sent
1926 */
1927 if (!read)
1928 (void)fdcpio(fdc,bp->b_cmd,
1929 bp->b_data+fd->skip,
1930 fdblk);
1931 }
1932 if (fd_cmd(fdc, 9,
1933 (read ? NE7CMD_READ : NE7CMD_WRITE),
1934 head << 2 | fdu, /* head & unit */
1935 fd->track, /* track */
1936 head,
1937 sec, /* sector + 1 */
1938 fd->ft.secsize, /* sector size */
1939 sectrac, /* sectors/track */
1940 fd->ft.gap, /* gap size */
1941 fd->ft.datalen, /* data length */
1942 0)) {
1943 /* the beast is sleeping again */
1944 if (!(fdc->flags & FDC_NODMA))
1945 isa_dmadone(isa_dmabp(bp),
1946 bp->b_data + fd->skip,
1947 format ? bp->b_bcount : fdblk,
1948 fdc->dmachan);
1949 fdc->retry = 6;
1950 return (retrier(fdc));
1951 }
1952 }
1953 if (fdc->flags & FDC_NODMA)
1954 /*
1955 * if this is a read, then simply await interrupt
1956 * before performing PIO
1957 */
1958 if (read && !fdcpio(fdc,bp->b_cmd,
1959 bp->b_data+fd->skip,fdblk)) {
1960 callout_reset(&fd->tohandle, hz,
1961 fd_iotimeout, fdc);
1962 return(0); /* will return later */
1963 }
1964
1965 /*
1966 * write (or format) operation will fall through and
1967 * await completion interrupt
1968 */
1969 fdc->state = IOCOMPLETE;
1970 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
1971 return (0); /* will return later */
1972 case PIOREAD:
1973 /*
1974 * actually perform the PIO read. The IOCOMPLETE case
1975 * removes the timeout for us.
1976 */
1977 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
1978 fdc->state = IOCOMPLETE;
1979 /* FALLTHROUGH */
1980 case IOCOMPLETE: /* IO DONE, post-analyze */
1981 callout_stop(&fd->tohandle);
1982
1983 if (fd_read_status(fdc, fd->fdsu)) {
1984 if (!(fdc->flags & FDC_NODMA)) {
1985 isa_dmadone(isa_dmabp(bp),
1986 bp->b_data + fd->skip,
1987 format ? bp->b_bcount : fdblk,
1988 fdc->dmachan);
1989 }
1990 if (fdc->retry < 6)
1991 fdc->retry = 6; /* force a reset */
1992 return (retrier(fdc));
1993 }
1994
1995 fdc->state = IOTIMEDOUT;
1996
1997 /* FALLTHROUGH */
1998
1999 case IOTIMEDOUT:
2000 if (!(fdc->flags & FDC_NODMA)) {
2001 isa_dmadone(isa_dmabp(bp),
2002 bp->b_data + fd->skip,
2003 format ? bp->b_bcount : fdblk, fdc->dmachan);
2004 }
2005 if (fdc->status[0] & NE7_ST0_IC) {
2006 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2007 && fdc->status[1] & NE7_ST1_OR) {
2008 /*
2009 * DMA overrun. Someone hogged the bus and
2010 * didn't release it in time for the next
2011 * FDC transfer.
2012 *
2013 * We normally restart this without bumping
2014 * the retry counter. However, in case
2015 * something is seriously messed up (like
2016 * broken hardware), we rather limit the
2017 * number of retries so the IO operation
2018 * doesn't block indefinately.
2019 */
2020 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
2021 fdc->state = SEEKCOMPLETE;
2022 return (1);
2023 } /* else fall through */
2024 }
2025 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
2026 && fdc->retry < 6)
2027 fdc->retry = 6; /* force a reset */
2028 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2029 && fdc->status[2] & NE7_ST2_WC
2030 && fdc->retry < 3)
2031 fdc->retry = 3; /* force recalibrate */
2032 return (retrier(fdc));
2033 }
2034 /* All OK */
2035 /* Operation successful, retry DMA overruns again next time. */
2036 fdc->dma_overruns = 0;
2037 fd->skip += fdblk;
2038 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
2039 /* set up next transfer */
2040 fdc->state = DOSEEK;
2041 } else {
2042 /* ALL DONE */
2043 fd->skip = 0;
2044 fdc->bio = NULL;
2045 #if 0
2046 device_unbusy(fd->dev);
2047 #endif
2048 devstat_end_transaction_buf(&fd->device_stats, bp);
2049 biodone(bio);
2050 fdc->fd = (fd_p) 0;
2051 fdc->fdu = -1;
2052 fdc->state = FINDWORK;
2053 }
2054 return (1);
2055 case RESETCTLR:
2056 fdc_reset(fdc);
2057 fdc->retry++;
2058 fdc->state = RESETCOMPLETE;
2059 return (0);
2060 case RESETCOMPLETE:
2061 /*
2062 * Discard all the results from the reset so that they
2063 * can't cause an unexpected interrupt later.
2064 */
2065 for (i = 0; i < 4; i++)
2066 (void)fd_sense_int(fdc, &st0, &cyl);
2067 fdc->state = STARTRECAL;
2068 /* Fall through. */
2069 case STARTRECAL:
2070 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
2071 /* arrgl */
2072 fdc->retry = 6;
2073 return (retrier(fdc));
2074 }
2075 fdc->state = RECALWAIT;
2076 return (0); /* will return later */
2077 case RECALWAIT:
2078 /* allow heads to settle */
2079 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
2080 fdc->state = RECALCOMPLETE;
2081 return (0); /* will return later */
2082 case RECALCOMPLETE:
2083 do {
2084 /*
2085 * See SEEKCOMPLETE for a comment on this:
2086 */
2087 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2088 return 0;
2089 if(fdc->fdct == FDC_NE765
2090 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2091 return 0; /* hope for a real intr */
2092 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2093 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2094 {
2095 if(fdc->retry > 3)
2096 /*
2097 * a recalibrate from beyond cylinder 77
2098 * will "fail" due to the FDC limitations;
2099 * since people used to complain much about
2100 * the failure message, try not logging
2101 * this one if it seems to be the first
2102 * time in a line
2103 */
2104 kprintf("fd%d: recal failed ST0 %b cyl %d\n",
2105 fdu, st0, NE7_ST0BITS, cyl);
2106 if(fdc->retry < 3) fdc->retry = 3;
2107 return (retrier(fdc));
2108 }
2109 fd->track = 0;
2110 /* Seek (probably) necessary */
2111 fdc->state = DOSEEK;
2112 return (1); /* will return immediatly */
2113 case MOTORWAIT:
2114 if(fd->flags & FD_MOTOR_WAIT)
2115 {
2116 return (0); /* time's not up yet */
2117 }
2118 if (fdc->flags & FDC_NEEDS_RESET) {
2119 fdc->state = RESETCTLR;
2120 fdc->flags &= ~FDC_NEEDS_RESET;
2121 } else {
2122 /*
2123 * If all motors were off, then the controller was
2124 * reset, so it has lost track of the current
2125 * cylinder. Recalibrate to handle this case.
2126 * But first, discard the results of the reset.
2127 */
2128 fdc->state = RESETCOMPLETE;
2129 }
2130 return (1); /* will return immediatly */
2131 default:
2132 device_printf(fdc->fdc_dev, "unexpected FD int->");
2133 if (fd_read_status(fdc, fd->fdsu) == 0)
2134 kprintf("FDC status :%x %x %x %x %x %x %x ",
2135 fdc->status[0],
2136 fdc->status[1],
2137 fdc->status[2],
2138 fdc->status[3],
2139 fdc->status[4],
2140 fdc->status[5],
2141 fdc->status[6] );
2142 else
2143 kprintf("No status available ");
2144 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2145 {
2146 kprintf("[controller is dead now]\n");
2147 return (0);
2148 }
2149 kprintf("ST0 = %x, PCN = %x\n", st0, cyl);
2150 return (0);
2151 }
2152 /*XXX confusing: some branches return immediately, others end up here*/
2153 return (1); /* Come back immediatly to new state */
2154 }
2155
2156 static int
2157 retrier(struct fdc_data *fdc)
2158 {
2159 struct bio *bio;
2160 struct buf *bp;
2161 struct fd_data *fd;
2162 cdev_t dev;
2163 int fdu;
2164
2165 bio = fdc->bio;
2166 bp = bio->bio_buf;
2167 dev = bio->bio_driver_info;
2168
2169 /* XXX shouldn't this be cached somewhere? */
2170 fdu = dkunit(dev);
2171 fd = devclass_get_softc(fd_devclass, fdu);
2172 if (fd->options & FDOPT_NORETRY)
2173 goto fail;
2174
2175 switch (fdc->retry) {
2176 case 0: case 1: case 2:
2177 fdc->state = SEEKCOMPLETE;
2178 break;
2179 case 3: case 4: case 5:
2180 fdc->state = STARTRECAL;
2181 break;
2182 case 6:
2183 fdc->state = RESETCTLR;
2184 break;
2185 case 7:
2186 break;
2187 default:
2188 fail:
2189 {
2190 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2191
2192 if (printerror) {
2193 /*
2194 * note: use the correct device for more
2195 * verbose error reporting.
2196 */
2197 diskerr(bio, dev,
2198 "hard error", LOG_PRINTF,
2199 fdc->fd->skip);
2200 }
2201 if (printerror) {
2202 if (fdc->flags & FDC_STAT_VALID)
2203 kprintf(
2204 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2205 fdc->status[0], NE7_ST0BITS,
2206 fdc->status[1], NE7_ST1BITS,
2207 fdc->status[2], NE7_ST2BITS,
2208 fdc->status[3], fdc->status[4],
2209 fdc->status[5]);
2210 else
2211 kprintf(" (No status)\n");
2212 }
2213 }
2214 bp->b_flags |= B_ERROR;
2215 bp->b_error = EIO;
2216 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2217 fdc->bio = NULL;
2218 fdc->fd->skip = 0;
2219 #if 0
2220 device_unbusy(fd->dev);
2221 #endif
2222 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2223 biodone(bio);
2224 fdc->state = FINDWORK;
2225 fdc->flags |= FDC_NEEDS_RESET;
2226 fdc->fd = (fd_p) 0;
2227 fdc->fdu = -1;
2228 return (1);
2229 }
2230 fdc->retry++;
2231 return (1);
2232 }
2233
2234 static int
2235 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred)
2236 {
2237 fdu_t fdu;
2238 fd_p fd;
2239 struct buf *bp;
2240 int rv = 0;
2241 size_t fdblk;
2242
2243 fdu = dkunit(dev);
2244 fd = devclass_get_softc(fd_devclass, fdu);
2245 fdblk = 128 << fd->ft.secsize;
2246
2247 /* set up a buffer header for fdstrategy() */
2248 bp = getpbuf(NULL);
2249 bp->b_cmd = BUF_CMD_FORMAT;
2250
2251 /*
2252 * calculate a fake blkno, so fdstrategy() would initiate a
2253 * seek to the requested cylinder
2254 */
2255 bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
2256 (fd->ft.sectrac * fd->ft.heads)
2257 + finfo->head * fd->ft.sectrac) * fdblk;
2258 bp->b_bio1.bio_driver_info = dev;
2259 bp->b_bio1.bio_flags |= BIO_SYNC;
2260 bp->b_bio1.bio_done = biodone_sync;
2261
2262 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2263 bp->b_data = (caddr_t)finfo;
2264
2265 /* now do the format */
2266 dev_dstrategy(dev, &bp->b_bio1);
2267
2268 /* ...and wait for it to complete */
2269 rv = biowait_timeout(&bp->b_bio1, "fdform", 20 * hz);
2270 if (rv == EWOULDBLOCK) {
2271 /* timed out */
2272 rv = EIO;
2273 #if 0
2274 device_unbusy(fd->dev);
2275 #endif
2276 biodone(&bp->b_bio1);
2277 }
2278 if (bp->b_flags & B_ERROR)
2279 rv = bp->b_error;
2280 /*
2281 * allow the process to be swapped
2282 */
2283 relpbuf(bp, NULL);
2284 return rv;
2285 }
2286
2287 /*
2288 * TODO: don't allocate buffer on stack.
2289 */
2290
2291 static int
2292 fdioctl(struct dev_ioctl_args *ap)
2293 {
2294 cdev_t dev = ap->a_head.a_dev;
2295 fdu_t fdu = dkunit(dev);
2296 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2297 struct fdc_status *fsp;
2298 int error = 0;
2299
2300 switch (ap->a_cmd) {
2301 case FD_FORM:
2302 if ((ap->a_fflag & FWRITE) == 0)
2303 error = EBADF; /* must be opened for writing */
2304 else if (((struct fd_formb *)ap->a_data)->format_version !=
2305 FD_FORMAT_VERSION)
2306 error = EINVAL; /* wrong version of formatting prog */
2307 else
2308 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred);
2309 break;
2310
2311 case FD_GTYPE: /* get drive type */
2312 *(struct fd_type *)ap->a_data = fd->ft;
2313 break;
2314
2315 case FD_STYPE: /* set drive type */
2316 /* this is considered harmful; only allow for superuser */
2317 if (priv_check_cred(ap->a_cred, PRIV_ROOT, 0) != 0)
2318 return EPERM;
2319 fd->ft = *(struct fd_type *)ap->a_data;
2320 break;
2321
2322 case FD_GOPTS: /* get drive options */
2323 *(int *)ap->a_data = fd->options;
2324 break;
2325
2326 case FD_SOPTS: /* set drive options */
2327 fd->options = *(int *)ap->a_data;
2328 break;
2329
2330 case FD_GSTAT:
2331 fsp = (struct fdc_status *)ap->a_data;
2332 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2333 return EINVAL;
2334 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2335 break;
2336
2337 default:
2338 error = ENOTTY;
2339 break;
2340 }
2341 return (error);
2342 }
DragonFly BSD