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Remove useless variable/assignments and add a missing 'break'.
[dragonfly/netmp.git] / sys / dev / disk / fd / fd.c
blob5d454e6074933a414ef404e1cf5d287763b01f37
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 * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.43 2008/08/13 08:18:09 swildner Exp $
55 *
56 */
57
58 #include "opt_fdc.h"
59 #include "use_pccard.h"
60
61 #include <sys/param.h>
62 #include <sys/systm.h>
63 #include <sys/bootmaj.h>
64 #include <sys/kernel.h>
65 #include <sys/buf.h>
66 #include <sys/bus.h>
67 #include <sys/conf.h>
68 #include <sys/diskslice.h>
69 #include <sys/disk.h>
70 #include <sys/devicestat.h>
71 #include <sys/fcntl.h>
72 #include <sys/malloc.h>
73 #include <sys/module.h>
74 #include <sys/proc.h>
75 #include <sys/syslog.h>
76 #include <sys/device.h>
77 #include <sys/bus.h>
78 #include <sys/rman.h>
79 #include <sys/buf2.h>
80 #include <sys/thread2.h>
81
82 #include <machine/clock.h>
83 #include <machine/ioctl_fd.h>
84 #include <machine/stdarg.h>
85
86 #include <bus/isa/isavar.h>
87 #include <bus/isa/isareg.h>
88 #include "fdreg.h"
89 #include "fdc.h"
90 #include <bus/isa/rtc.h>
91
92 /* configuration flags */
93 #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
94 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
95
96 /* internally used only, not really from CMOS: */
97 #define RTCFDT_144M_PRETENDED 0x1000
98
99 /* error returns for fd_cmd() */
100 #define FD_FAILED -1
101 #define FD_NOT_VALID -2
102 #define FDC_ERRMAX 100 /* do not log more */
103 /*
104 * Stop retrying after this many DMA overruns. Since each retry takes
105 * one revolution, with 300 rpm., 25 retries take approximately 10
106 * seconds which the read attempt will block in case the DMA overrun
107 * is persistent.
108 */
109 #define FDC_DMAOV_MAX 25
110
111 /*
112 * Timeout value for the PIO loops to wait until the FDC main status
113 * register matches our expectations (request for master, direction
114 * bit). This is supposed to be a number of microseconds, although
115 * timing might actually not be very accurate.
116 *
117 * Timeouts of 100 msec are believed to be required for some broken
118 * (old) hardware.
119 */
120 #define FDSTS_TIMEOUT 100000
121
122 #define NUMTYPES 17
123 #define NUMDENS (NUMTYPES - 7)
124
125 /* These defines (-1) must match index for fd_types */
126 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
127 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */
128 #define FD_1720 1
129 #define FD_1480 2
130 #define FD_1440 3
131 #define FD_1200 4
132 #define FD_820 5
133 #define FD_800 6
134 #define FD_720 7
135 #define FD_360 8
136 #define FD_640 9
137 #define FD_1232 10
138
139 #define FD_1480in5_25 11
140 #define FD_1440in5_25 12
141 #define FD_820in5_25 13
142 #define FD_800in5_25 14
143 #define FD_720in5_25 15
144 #define FD_360in5_25 16
145 #define FD_640in5_25 17
146
147
148 static struct fd_type fd_types[NUMTYPES] =
149 {
150 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
151 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
152 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
153 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
154 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
155 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
156 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
157 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
158 { 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
159 { 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
160
161 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
162 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
163 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
164 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
165 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
166 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
167 { 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
168 };
169
170 #define DRVS_PER_CTLR 2 /* 2 floppies */
171
172 /***********************************************************************\
173 * Per controller structure. *
174 \***********************************************************************/
175 devclass_t fdc_devclass;
176
177 /***********************************************************************\
178 * Per drive structure. *
179 * N per controller (DRVS_PER_CTLR) *
180 \***********************************************************************/
181 struct fd_data {
182 struct fdc_data *fdc; /* pointer to controller structure */
183 int fdsu; /* this units number on this controller */
184 int type; /* Drive type (FD_1440...) */
185 struct fd_type ft; /* the type descriptor */
186 int flags;
187 #define FD_OPEN 0x01 /* it's open */
188 #define FD_ACTIVE 0x02 /* it's active */
189 #define FD_MOTOR 0x04 /* motor should be on */
190 #define FD_MOTOR_WAIT 0x08 /* motor coming up */
191 int skip;
192 int hddrv;
193 #define FD_NO_TRACK -2
194 int track; /* where we think the head is */
195 int options; /* user configurable options, see ioctl_fd.h */
196 struct callout toffhandle;
197 struct callout tohandle;
198 struct callout motor;
199 struct disk disk;
200 struct devstat device_stats;
201 device_t dev;
202 fdu_t fdu;
203 };
204
205 struct fdc_ivars {
206 int fdunit;
207 };
208 static devclass_t fd_devclass;
209
210 /***********************************************************************\
211 * Throughout this file the following conventions will be used: *
212 * fd is a pointer to the fd_data struct for the drive in question *
213 * fdc is a pointer to the fdc_data struct for the controller *
214 * fdu is the floppy drive unit number *
215 * fdcu is the floppy controller unit number *
216 * fdsu is the floppy drive unit number on that controller. (sub-unit) *
217 \***********************************************************************/
218
219 /* internal functions */
220 static void fdc_intr(void *);
221 static void set_motor(struct fdc_data *, int, int);
222 # define TURNON 1
223 # define TURNOFF 0
224 static timeout_t fd_turnoff;
225 static timeout_t fd_motor_on;
226 static void fd_turnon(struct fd_data *);
227 static void fdc_reset(fdc_p);
228 static int fd_in(struct fdc_data *, int *);
229 static int out_fdc(struct fdc_data *, int);
230 static void fdstart(struct fdc_data *);
231 static timeout_t fd_iotimeout;
232 static timeout_t fd_pseudointr;
233 static int fdstate(struct fdc_data *);
234 static int retrier(struct fdc_data *);
235 static int fdformat(cdev_t, struct fd_formb *, struct ucred *);
236
237 static int enable_fifo(fdc_p fdc);
238
239 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
240
241
242 #define DEVIDLE 0
243 #define FINDWORK 1
244 #define DOSEEK 2
245 #define SEEKCOMPLETE 3
246 #define IOCOMPLETE 4
247 #define RECALCOMPLETE 5
248 #define STARTRECAL 6
249 #define RESETCTLR 7
250 #define SEEKWAIT 8
251 #define RECALWAIT 9
252 #define MOTORWAIT 10
253 #define IOTIMEDOUT 11
254 #define RESETCOMPLETE 12
255 #define PIOREAD 13
256
257 #ifdef FDC_DEBUG
258 static char const * const fdstates[] =
259 {
260 "DEVIDLE",
261 "FINDWORK",
262 "DOSEEK",
263 "SEEKCOMPLETE",
264 "IOCOMPLETE",
265 "RECALCOMPLETE",
266 "STARTRECAL",
267 "RESETCTLR",
268 "SEEKWAIT",
269 "RECALWAIT",
270 "MOTORWAIT",
271 "IOTIMEDOUT",
272 "RESETCOMPLETE",
273 "PIOREAD",
274 };
275
276 /* CAUTION: fd_debug causes huge amounts of logging output */
277 static int volatile fd_debug = 0;
278 #define TRACE0(arg) if(fd_debug) kprintf(arg)
279 #define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2)
280 #else /* FDC_DEBUG */
281 #define TRACE0(arg)
282 #define TRACE1(arg1, arg2)
283 #endif /* FDC_DEBUG */
284
285 void
286 fdout_wr(fdc_p fdc, u_int8_t v)
287 {
288 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
289 }
290
291 static u_int8_t
292 fdsts_rd(fdc_p fdc)
293 {
294 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
295 }
296
297 static void
298 fddata_wr(fdc_p fdc, u_int8_t v)
299 {
300 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
301 }
302
303 static u_int8_t
304 fddata_rd(fdc_p fdc)
305 {
306 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
307 }
308
309 static void
310 fdctl_wr_isa(fdc_p fdc, u_int8_t v)
311 {
312 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
313 }
314
315 #if 0
316
317 static u_int8_t
318 fdin_rd(fdc_p fdc)
319 {
320 return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
321 }
322
323 #endif
324
325 static d_open_t Fdopen; /* NOTE, not fdopen */
326 static d_close_t fdclose;
327 static d_ioctl_t fdioctl;
328 static d_strategy_t fdstrategy;
329
330 static struct dev_ops fd_ops = {
331 { "fd", FD_CDEV_MAJOR, D_DISK },
332 .d_open = Fdopen,
333 .d_close = fdclose,
334 .d_read = physread,
335 .d_write = physwrite,
336 .d_ioctl = fdioctl,
337 .d_strategy = fdstrategy,
338 };
339
340 static int
341 fdc_err(struct fdc_data *fdc, const char *s)
342 {
343 fdc->fdc_errs++;
344 if (s) {
345 if (fdc->fdc_errs < FDC_ERRMAX)
346 device_printf(fdc->fdc_dev, "%s", s);
347 else if (fdc->fdc_errs == FDC_ERRMAX)
348 device_printf(fdc->fdc_dev, "too many errors, not "
349 "logging any more\n");
350 }
351
352 return FD_FAILED;
353 }
354
355 /*
356 * fd_cmd: Send a command to the chip. Takes a varargs with this structure:
357 * Unit number,
358 * # of output bytes, output bytes as ints ...,
359 * # of input bytes, input bytes as ints ...
360 */
361 int
362 fd_cmd(struct fdc_data *fdc, int n_out, ...)
363 {
364 u_char cmd;
365 int n_in;
366 int n;
367 __va_list ap;
368
369 __va_start(ap, n_out);
370 cmd = (u_char)(__va_arg(ap, int));
371 __va_end(ap);
372 __va_start(ap, n_out);
373 for (n = 0; n < n_out; n++)
374 {
375 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
376 {
377 char msg[50];
378 ksnprintf(msg, sizeof(msg),
379 "cmd %x failed at out byte %d of %d\n",
380 cmd, n + 1, n_out);
381 return fdc_err(fdc, msg);
382 }
383 }
384 n_in = __va_arg(ap, int);
385 for (n = 0; n < n_in; n++)
386 {
387 int *ptr = __va_arg(ap, int *);
388 if (fd_in(fdc, ptr) < 0)
389 {
390 char msg[50];
391 ksnprintf(msg, sizeof(msg),
392 "cmd %02x failed at in byte %d of %d\n",
393 cmd, n + 1, n_in);
394 return fdc_err(fdc, msg);
395 }
396 }
397
398 return 0;
399 }
400
401 static int
402 enable_fifo(fdc_p fdc)
403 {
404 int i, j;
405
406 if ((fdc->flags & FDC_HAS_FIFO) == 0) {
407
408 /*
409 * XXX:
410 * Cannot use fd_cmd the normal way here, since
411 * this might be an invalid command. Thus we send the
412 * first byte, and check for an early turn of data directon.
413 */
414
415 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
416 return fdc_err(fdc, "Enable FIFO failed\n");
417
418 /* If command is invalid, return */
419 j = FDSTS_TIMEOUT;
420 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
421 != NE7_RQM && j-- > 0) {
422 if (i == (NE7_DIO | NE7_RQM)) {
423 fdc_reset(fdc);
424 return FD_FAILED;
425 }
426 DELAY(1);
427 }
428 if (j<0 ||
429 fd_cmd(fdc, 3,
430 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
431 fdc_reset(fdc);
432 return fdc_err(fdc, "Enable FIFO failed\n");
433 }
434 fdc->flags |= FDC_HAS_FIFO;
435 return 0;
436 }
437 if (fd_cmd(fdc, 4,
438 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
439 return fdc_err(fdc, "Re-enable FIFO failed\n");
440 return 0;
441 }
442
443 static int
444 fd_sense_drive_status(fdc_p fdc, int *st3p)
445 {
446 int st3;
447
448 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
449 {
450 return fdc_err(fdc, "Sense Drive Status failed\n");
451 }
452 if (st3p)
453 *st3p = st3;
454
455 return 0;
456 }
457
458 static int
459 fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
460 {
461 int cyl, st0, ret;
462
463 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
464 if (ret) {
465 (void)fdc_err(fdc,
466 "sense intr err reading stat reg 0\n");
467 return ret;
468 }
469
470 if (st0p)
471 *st0p = st0;
472
473 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
474 /*
475 * There doesn't seem to have been an interrupt.
476 */
477 return FD_NOT_VALID;
478 }
479
480 if (fd_in(fdc, &cyl) < 0) {
481 return fdc_err(fdc, "can't get cyl num\n");
482 }
483
484 if (cylp)
485 *cylp = cyl;
486
487 return 0;
488 }
489
490
491 static int
492 fd_read_status(fdc_p fdc, int fdsu)
493 {
494 int i, ret;
495
496 for (i = 0; i < 7; i++) {
497 /*
498 * XXX types are poorly chosen. Only bytes can by read
499 * from the hardware, but fdc->status[] wants u_ints and
500 * fd_in() gives ints.
501 */
502 int status;
503
504 ret = fd_in(fdc, &status);
505 fdc->status[i] = status;
506 if (ret != 0)
507 break;
508 }
509
510 if (ret == 0)
511 fdc->flags |= FDC_STAT_VALID;
512 else
513 fdc->flags &= ~FDC_STAT_VALID;
514
515 return ret;
516 }
517
518 /****************************************************************************/
519 /* autoconfiguration stuff */
520 /****************************************************************************/
521
522 int
523 fdc_alloc_resources(struct fdc_data *fdc)
524 {
525 device_t dev;
526 int ispnp, ispcmcia;
527
528 dev = fdc->fdc_dev;
529 ispnp = (fdc->flags & FDC_ISPNP) != 0;
530 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
531 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
532 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
533
534 /*
535 * On standard ISA, we don't just use an 8 port range
536 * (e.g. 0x3f0-0x3f7) since that covers an IDE control
537 * register at 0x3f6.
538 *
539 * Isn't PC hardware wonderful.
540 *
541 * The Y-E Data PCMCIA FDC doesn't have this problem, it
542 * uses the register with offset 6 for pseudo-DMA, and the
543 * one with offset 7 as control register.
544 */
545 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
546 &fdc->rid_ioport, 0ul, ~0ul,
547 ispcmcia ? 8 : (ispnp ? 1 : 6),
548 RF_ACTIVE);
549 if (fdc->res_ioport == 0) {
550 device_printf(dev, "cannot reserve I/O port range\n");
551 return ENXIO;
552 }
553 fdc->portt = rman_get_bustag(fdc->res_ioport);
554 fdc->porth = rman_get_bushandle(fdc->res_ioport);
555
556 if (!ispcmcia) {
557 /*
558 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
559 * and some at 0x3f0-0x3f5,0x3f7. We detect the former
560 * by checking the size and adjust the port address
561 * accordingly.
562 */
563 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
564 fdc->port_off = -2;
565
566 /*
567 * Register the control port range as rid 1 if it
568 * isn't there already. Most PnP BIOSen will have
569 * already done this but non-PnP configurations don't.
570 *
571 * And some (!!) report 0x3f2-0x3f5 and completely
572 * leave out the control register! It seems that some
573 * non-antique controller chips have a different
574 * method of programming the transfer speed which
575 * doesn't require the control register, but it's
576 * mighty bogus as the chip still responds to the
577 * address for the control register.
578 */
579 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
580 u_long ctlstart;
581
582 /* Find the control port, usually 0x3f7 */
583 ctlstart = rman_get_start(fdc->res_ioport) +
584 fdc->port_off + 7;
585
586 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
587 }
588
589 /*
590 * Now (finally!) allocate the control port.
591 */
592 fdc->rid_ctl = 1;
593 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
594 &fdc->rid_ctl,
595 0ul, ~0ul, 1, RF_ACTIVE);
596 if (fdc->res_ctl == 0) {
597 device_printf(dev,
598 "cannot reserve control I/O port range\n");
599 return ENXIO;
600 }
601 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
602 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
603 }
604
605 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
606 &fdc->rid_irq, 0ul, ~0ul, 1,
607 RF_ACTIVE);
608 if (fdc->res_irq == 0) {
609 device_printf(dev, "cannot reserve interrupt line\n");
610 return ENXIO;
611 }
612
613 if ((fdc->flags & FDC_NODMA) == 0) {
614 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
615 &fdc->rid_drq, 0ul, ~0ul, 1,
616 RF_ACTIVE);
617 if (fdc->res_drq == 0) {
618 device_printf(dev, "cannot reserve DMA request line\n");
619 return ENXIO;
620 }
621 fdc->dmachan = fdc->res_drq->r_start;
622 }
623
624 return 0;
625 }
626
627 void
628 fdc_release_resources(struct fdc_data *fdc)
629 {
630 device_t dev;
631
632 dev = fdc->fdc_dev;
633 if (fdc->res_irq != 0) {
634 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
635 fdc->res_irq);
636 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
637 fdc->res_irq);
638 }
639 if (fdc->res_ctl != 0) {
640 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
641 fdc->res_ctl);
642 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
643 fdc->res_ctl);
644 }
645 if (fdc->res_ioport != 0) {
646 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
647 fdc->res_ioport);
648 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
649 fdc->res_ioport);
650 }
651 if (fdc->res_drq != 0) {
652 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
653 fdc->res_drq);
654 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
655 fdc->res_drq);
656 }
657 }
658
659 /****************************************************************************/
660 /* autoconfiguration stuff */
661 /****************************************************************************/
662
663 static struct isa_pnp_id fdc_ids[] = {
664 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
665 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
666 {0}
667 };
668
669 int
670 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
671 {
672 struct fdc_ivars *ivars = device_get_ivars(child);
673
674 switch (which) {
675 case FDC_IVAR_FDUNIT:
676 *result = ivars->fdunit;
677 break;
678 default:
679 return ENOENT;
680 }
681 return 0;
682 }
683
684 /*
685 * fdc controller section.
686 */
687 static int
688 fdc_probe(device_t dev)
689 {
690 int error, ic_type;
691 struct fdc_data *fdc;
692
693 fdc = device_get_softc(dev);
694 bzero(fdc, sizeof *fdc);
695 fdc->fdc_dev = dev;
696 fdc->fdctl_wr = fdctl_wr_isa;
697
698 /* Check pnp ids */
699 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
700 if (error == ENXIO)
701 return ENXIO;
702 if (error == 0)
703 fdc->flags |= FDC_ISPNP;
704
705 /* Attempt to allocate our resources for the duration of the probe */
706 error = fdc_alloc_resources(fdc);
707 if (error)
708 goto out;
709
710 /* First - lets reset the floppy controller */
711 fdout_wr(fdc, 0);
712 DELAY(100);
713 fdout_wr(fdc, FDO_FRST);
714
715 /* see if it can handle a command */
716 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
717 NE7_SPEC_2(2, 0), 0)) {
718 error = ENXIO;
719 goto out;
720 }
721
722 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
723 ic_type = (u_char)ic_type;
724 switch (ic_type) {
725 case 0x80:
726 device_set_desc(dev, "NEC 765 or clone");
727 fdc->fdct = FDC_NE765;
728 break;
729 case 0x81:
730 device_set_desc(dev, "Intel 82077 or clone");
731 fdc->fdct = FDC_I82077;
732 break;
733 case 0x90:
734 device_set_desc(dev, "NEC 72065B or clone");
735 fdc->fdct = FDC_NE72065;
736 break;
737 default:
738 device_set_desc(dev, "generic floppy controller");
739 fdc->fdct = FDC_UNKNOWN;
740 break;
741 }
742 }
743
744 out:
745 fdc_release_resources(fdc);
746 return (error);
747 }
748
749 /*
750 * Add a child device to the fdc controller. It will then be probed etc.
751 */
752 static void
753 fdc_add_child(device_t dev, const char *name, int unit)
754 {
755 int disabled;
756 struct fdc_ivars *ivar;
757 device_t child;
758
759 ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
760 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
761 ivar->fdunit = 0;
762 child = device_add_child(dev, name, unit);
763 if (child == NULL)
764 return;
765 device_set_ivars(child, ivar);
766 if (resource_int_value(name, unit, "disabled", &disabled) == 0
767 && disabled != 0)
768 device_disable(child);
769 }
770
771 int
772 fdc_attach(device_t dev)
773 {
774 struct fdc_data *fdc;
775 int i, error;
776
777 fdc = device_get_softc(dev);
778
779 callout_init(&fdc->pseudointr_ch);
780
781 error = fdc_alloc_resources(fdc);
782 if (error) {
783 device_printf(dev, "cannot reacquire resources\n");
784 return error;
785 }
786 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
787 0, fdc_intr, fdc,
788 &fdc->fdc_intr, NULL);
789 if (error) {
790 device_printf(dev, "cannot setup interrupt\n");
791 return error;
792 }
793 fdc->fdcu = device_get_unit(dev);
794 fdc->flags |= FDC_ATTACHED;
795
796 if ((fdc->flags & FDC_NODMA) == 0) {
797 /* Acquire the DMA channel forever, The driver will do the rest */
798 /* XXX should integrate with rman */
799 isa_dma_acquire(fdc->dmachan);
800 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
801 }
802 fdc->state = DEVIDLE;
803
804 /* reset controller, turn motor off, clear fdout mirror reg */
805 fdout_wr(fdc, ((fdc->fdout = 0)));
806 bioq_init(&fdc->bio_queue);
807
808 /*
809 * Probe and attach any children. We should probably detect
810 * devices from the BIOS unless overridden.
811 */
812 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
813 i != -1;
814 i = resource_query_string(i, "at", device_get_nameunit(dev)))
815 fdc_add_child(dev, resource_query_name(i),
816 resource_query_unit(i));
817
818 return (bus_generic_attach(dev));
819 }
820
821 int
822 fdc_print_child(device_t me, device_t child)
823 {
824 int retval = 0;
825
826 retval += bus_print_child_header(me, child);
827 retval += kprintf(" on %s drive %d\n", device_get_nameunit(me),
828 fdc_get_fdunit(child));
829
830 return (retval);
831 }
832
833 static device_method_t fdc_methods[] = {
834 /* Device interface */
835 DEVMETHOD(device_probe, fdc_probe),
836 DEVMETHOD(device_attach, fdc_attach),
837 DEVMETHOD(device_detach, bus_generic_detach),
838 DEVMETHOD(device_shutdown, bus_generic_shutdown),
839 DEVMETHOD(device_suspend, bus_generic_suspend),
840 DEVMETHOD(device_resume, bus_generic_resume),
841
842 /* Bus interface */
843 DEVMETHOD(bus_print_child, fdc_print_child),
844 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
845 /* Our children never use any other bus interface methods. */
846
847 { 0, 0 }
848 };
849
850 static driver_t fdc_driver = {
851 "fdc",
852 fdc_methods,
853 sizeof(struct fdc_data)
854 };
855
856 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
857 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, 0, 0);
858
859 /******************************************************************/
860 /*
861 * devices attached to the controller section.
862 */
863 static int
864 fd_probe(device_t dev)
865 {
866 int i;
867 u_int fdt, st0, st3;
868 struct fd_data *fd;
869 struct fdc_data *fdc;
870 fdsu_t fdsu;
871 static int fd_fifo = 0;
872
873 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
874 fd = device_get_softc(dev);
875 fdc = device_get_softc(device_get_parent(dev));
876
877 bzero(fd, sizeof *fd);
878 fd->dev = dev;
879 fd->fdc = fdc;
880 fd->fdsu = fdsu;
881 fd->fdu = device_get_unit(dev);
882
883 #ifdef __i386__
884 /* look up what bios thinks we have */
885 switch (fd->fdu) {
886 case 0:
887 if ((fdc->flags & FDC_ISPCMCIA))
888 fdt = RTCFDT_144M;
889 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
890 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
891 else
892 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
893 break;
894 case 1:
895 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
896 break;
897 default:
898 fdt = RTCFDT_NONE;
899 break;
900 }
901 #else
902 fdt = RTCFDT_144M; /* XXX probably */
903 #endif
904
905 /* is there a unit? */
906 if (fdt == RTCFDT_NONE)
907 return (ENXIO);
908
909 /* select it */
910 set_motor(fdc, fdsu, TURNON);
911 DELAY(1000000); /* 1 sec */
912
913 /* XXX This doesn't work before the first set_motor() */
914 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
915 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
916 && enable_fifo(fdc) == 0) {
917 device_printf(device_get_parent(dev),
918 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
919 }
920 fd_fifo = 1;
921
922 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
923 && (st3 & NE7_ST3_T0)) {
924 /* if at track 0, first seek inwards */
925 /* seek some steps: */
926 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
927 DELAY(300000); /* ...wait a moment... */
928 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
929 }
930
931 /* If we're at track 0 first seek inwards. */
932 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
933 /* Seek some steps... */
934 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
935 /* ...wait a moment... */
936 DELAY(300000);
937 /* make ctrlr happy: */
938 fd_sense_int(fdc, 0, 0);
939 }
940 }
941
942 for (i = 0; i < 2; i++) {
943 /*
944 * we must recalibrate twice, just in case the
945 * heads have been beyond cylinder 76, since most
946 * FDCs still barf when attempting to recalibrate
947 * more than 77 steps
948 */
949 /* go back to 0: */
950 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
951 /* a second being enough for full stroke seek*/
952 DELAY(i == 0 ? 1000000 : 300000);
953
954 /* anything responding? */
955 if (fd_sense_int(fdc, &st0, 0) == 0 &&
956 (st0 & NE7_ST0_EC) == 0)
957 break; /* already probed succesfully */
958 }
959 }
960
961 set_motor(fdc, fdsu, TURNOFF);
962
963 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
964 return (ENXIO);
965
966 fd->track = FD_NO_TRACK;
967 fd->fdc = fdc;
968 fd->fdsu = fdsu;
969 fd->options = 0;
970 callout_init(&fd->toffhandle);
971 callout_init(&fd->tohandle);
972 callout_init(&fd->motor);
973
974 switch (fdt) {
975 case RTCFDT_12M:
976 device_set_desc(dev, "1200-KB 5.25\" drive");
977 fd->type = FD_1200;
978 break;
979 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
980 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
981 fd->type = FD_1440;
982 break;
983 case RTCFDT_144M:
984 device_set_desc(dev, "1440-KB 3.5\" drive");
985 fd->type = FD_1440;
986 break;
987 case RTCFDT_288M:
988 case RTCFDT_288M_1:
989 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
990 fd->type = FD_1440;
991 break;
992 case RTCFDT_360K:
993 device_set_desc(dev, "360-KB 5.25\" drive");
994 fd->type = FD_360;
995 break;
996 case RTCFDT_720K:
997 kprintf("720-KB 3.5\" drive");
998 fd->type = FD_720;
999 break;
1000 default:
1001 return (ENXIO);
1002 }
1003 fd->ft = fd_types[fd->type - 1];
1004 return (0);
1005 }
1006
1007 static int
1008 fd_attach(device_t dev)
1009 {
1010 struct fd_data *fd;
1011
1012 fd = device_get_softc(dev);
1013
1014 disk_create(fd->fdu, &fd->disk, &fd_ops);
1015
1016 /*
1017 * Make special raw floppy devices with preset types to
1018 * make formatting easier. These override the disk management
1019 * layer for the whole-slice-disk for partitions 128-191. Note
1020 * that we do not override partition 255, which is the
1021 * whole-slice-part. If we did we would have to provide our
1022 * own DIOCGPART ioctl.
1023 */
1024 dev_ops_add(&fd_ops,
1025 dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),
1026 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128));
1027 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 1),
1028 UID_ROOT, GID_WHEEL, 0600, "fd%d.1720", fd->fdu);
1029 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 2),
1030 UID_ROOT, GID_WHEEL, 0600, "fd%d.1480", fd->fdu);
1031 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 3),
1032 UID_ROOT, GID_WHEEL, 0600, "fd%d.1440", fd->fdu);
1033 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 4),
1034 UID_ROOT, GID_WHEEL, 0600, "fd%d.1200", fd->fdu);
1035 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 5),
1036 UID_ROOT, GID_WHEEL, 0600, "fd%d.820", fd->fdu);
1037 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 6),
1038 UID_ROOT, GID_WHEEL, 0600, "fd%d.800", fd->fdu);
1039 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 7),
1040 UID_ROOT, GID_WHEEL, 0600, "fd%d.720", fd->fdu);
1041 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 8),
1042 UID_ROOT, GID_WHEEL, 0600, "fd%d.360", fd->fdu);
1043 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 9),
1044 UID_ROOT, GID_WHEEL, 0600, "fd%d.640", fd->fdu);
1045 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 10),
1046 UID_ROOT, GID_WHEEL, 0600, "fd%d.1232", fd->fdu);
1047
1048 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1049 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1050 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1051 DEVSTAT_PRIORITY_FD);
1052 return (0);
1053 }
1054
1055 static int
1056 fd_detach(device_t dev)
1057 {
1058 struct fd_data *fd;
1059
1060 fd = device_get_softc(dev);
1061 dev_ops_remove(&fd_ops,
1062 dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),
1063 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128));
1064 disk_invalidate(&fd->disk);
1065 disk_destroy(&fd->disk);
1066 devstat_remove_entry(&fd->device_stats);
1067 callout_stop(&fd->toffhandle);
1068 callout_stop(&fd->motor);
1069
1070 return (0);
1071 }
1072
1073 static device_method_t fd_methods[] = {
1074 /* Device interface */
1075 DEVMETHOD(device_probe, fd_probe),
1076 DEVMETHOD(device_attach, fd_attach),
1077 DEVMETHOD(device_detach, fd_detach),
1078 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1079 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1080 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1081
1082 { 0, 0 }
1083 };
1084
1085 static driver_t fd_driver = {
1086 "fd",
1087 fd_methods,
1088 sizeof(struct fd_data)
1089 };
1090
1091 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1092
1093 /****************************************************************************/
1094 /* motor control stuff */
1095 /* remember to not deselect the drive we're working on */
1096 /****************************************************************************/
1097 static void
1098 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1099 {
1100 int fdout = fdc->fdout;
1101 int needspecify = 0;
1102
1103 if(turnon) {
1104 fdout &= ~FDO_FDSEL;
1105 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1106 } else
1107 fdout &= ~(FDO_MOEN0 << fdsu);
1108
1109 if(!turnon
1110 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1111 /* gonna turn off the last drive, put FDC to bed */
1112 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1113 else {
1114 /* make sure controller is selected and specified */
1115 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1116 needspecify = 1;
1117 fdout |= (FDO_FRST|FDO_FDMAEN);
1118 }
1119
1120 fdout_wr(fdc, fdout);
1121 fdc->fdout = fdout;
1122 TRACE1("[0x%x->FDOUT]", fdout);
1123
1124 if (needspecify) {
1125 /*
1126 * XXX
1127 * special case: since we have just woken up the FDC
1128 * from its sleep, we silently assume the command will
1129 * be accepted, and do not test for a timeout
1130 */
1131 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1132 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1133 0);
1134 if (fdc->flags & FDC_HAS_FIFO)
1135 (void) enable_fifo(fdc);
1136 }
1137 }
1138
1139 static void
1140 fd_turnoff(void *xfd)
1141 {
1142 fd_p fd = xfd;
1143
1144 TRACE1("[fd%d: turnoff]", fd->fdu);
1145
1146 crit_enter();
1147 /*
1148 * Don't turn off the motor yet if the drive is active.
1149 *
1150 * If we got here, this could only mean we missed an interrupt.
1151 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1152 * after a controller reset. Just schedule a pseudo-interrupt
1153 * so the state machine gets re-entered.
1154 */
1155 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1156 fdc_intr(fd->fdc);
1157 crit_exit();
1158 return;
1159 }
1160
1161 fd->flags &= ~FD_MOTOR;
1162 set_motor(fd->fdc, fd->fdsu, TURNOFF);
1163 crit_exit();
1164 }
1165
1166 static void
1167 fd_motor_on(void *xfd)
1168 {
1169 fd_p fd = xfd;
1170
1171 crit_enter();
1172 fd->flags &= ~FD_MOTOR_WAIT;
1173 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1174 {
1175 fdc_intr(fd->fdc);
1176 }
1177 crit_exit();
1178 }
1179
1180 static void
1181 fd_turnon(fd_p fd)
1182 {
1183 if(!(fd->flags & FD_MOTOR))
1184 {
1185 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1186 set_motor(fd->fdc, fd->fdsu, TURNON);
1187 callout_reset(&fd->motor, hz, fd_motor_on, fd);
1188 }
1189 }
1190
1191 static void
1192 fdc_reset(fdc_p fdc)
1193 {
1194 /* Try a reset, keep motor on */
1195 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1196 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1197 DELAY(100);
1198 /* enable FDC, but defer interrupts a moment */
1199 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1200 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1201 DELAY(100);
1202 fdout_wr(fdc, fdc->fdout);
1203 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1204
1205 /* XXX after a reset, silently believe the FDC will accept commands */
1206 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1207 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1208 0);
1209 if (fdc->flags & FDC_HAS_FIFO)
1210 (void) enable_fifo(fdc);
1211 }
1212
1213 /****************************************************************************/
1214 /* fdc in/out */
1215 /****************************************************************************/
1216 /*
1217 * FDC IO functions, take care of the main status register, timeout
1218 * in case the desired status bits are never set.
1219 *
1220 * These PIO loops initially start out with short delays between
1221 * each iteration in the expectation that the required condition
1222 * is usually met quickly, so it can be handled immediately. After
1223 * about 1 ms, stepping is increased to achieve a better timing
1224 * accuracy in the calls to DELAY().
1225 */
1226 static int
1227 fd_in(struct fdc_data *fdc, int *ptr)
1228 {
1229 int i, j, step;
1230
1231 for (j = 0, step = 1;
1232 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1233 j < FDSTS_TIMEOUT;
1234 j += step) {
1235 if (i == NE7_RQM)
1236 return (fdc_err(fdc, "ready for output in input\n"));
1237 if (j == 1000)
1238 step = 1000;
1239 DELAY(step);
1240 }
1241 if (j >= FDSTS_TIMEOUT)
1242 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1243 #ifdef FDC_DEBUG
1244 i = fddata_rd(fdc);
1245 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1246 *ptr = i;
1247 return (0);
1248 #else /* !FDC_DEBUG */
1249 i = fddata_rd(fdc);
1250 if (ptr)
1251 *ptr = i;
1252 return (0);
1253 #endif /* FDC_DEBUG */
1254 }
1255
1256 static int
1257 out_fdc(struct fdc_data *fdc, int x)
1258 {
1259 int i, j, step;
1260
1261 for (j = 0, step = 1;
1262 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1263 j < FDSTS_TIMEOUT;
1264 j += step) {
1265 if (i == (NE7_DIO|NE7_RQM))
1266 return (fdc_err(fdc, "ready for input in output\n"));
1267 if (j == 1000)
1268 step = 1000;
1269 DELAY(step);
1270 }
1271 if (j >= FDSTS_TIMEOUT)
1272 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1273
1274 /* Send the command and return */
1275 fddata_wr(fdc, x);
1276 TRACE1("[0x%x->FDDATA]", x);
1277 return (0);
1278 }
1279
1280 /****************************************************************************/
1281 /* fdopen/fdclose */
1282 /****************************************************************************/
1283 int
1284 Fdopen(struct dev_open_args *ap)
1285 {
1286 cdev_t dev = ap->a_head.a_dev;
1287 fdu_t fdu = dkunit(dev);
1288 struct disk_info info;
1289 struct fd_type *ft;
1290 int type;
1291 int changetype;
1292 fd_p fd;
1293 fdc_p fdc;
1294
1295 /* check bounds */
1296 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1297 return (ENXIO);
1298 fdc = fd->fdc;
1299 if ((fdc == NULL) || (fd->type == NO_TYPE))
1300 return (ENXIO);
1301
1302 /*
1303 * Figure out the type of floppy. There are special whole-disk-device
1304 * overrides that will override the current type.
1305 */
1306 type = dkpart(dev);
1307 if (type == WHOLE_SLICE_PART) {
1308 type = fd->type; /* do not change selected type data */
1309 changetype = 0;
1310 } else if (type > 128) {
1311 type -= 128; /* set to specific format */
1312 changetype = 1;
1313 } else {
1314 type = fd->type; /* reset to default */
1315 changetype = 1;
1316 }
1317 if (type > NUMDENS)
1318 return (ENXIO);
1319 if (type != fd->type) {
1320 /*
1321 * For each type of basic drive, make sure we are trying
1322 * to open a type it can do,
1323 */
1324 switch (fd->type) {
1325 case FD_360:
1326 return (ENXIO);
1327 case FD_720:
1328 if ( type != FD_820
1329 && type != FD_800
1330 && type != FD_640
1331 )
1332 return (ENXIO);
1333 break;
1334 case FD_1200:
1335 switch (type) {
1336 case FD_1480:
1337 type = FD_1480in5_25;
1338 break;
1339 case FD_1440:
1340 type = FD_1440in5_25;
1341 break;
1342 case FD_1232:
1343 break;
1344 case FD_820:
1345 type = FD_820in5_25;
1346 break;
1347 case FD_800:
1348 type = FD_800in5_25;
1349 break;
1350 case FD_720:
1351 type = FD_720in5_25;
1352 break;
1353 case FD_640:
1354 type = FD_640in5_25;
1355 break;
1356 case FD_360:
1357 type = FD_360in5_25;
1358 break;
1359 default:
1360 return(ENXIO);
1361 }
1362 break;
1363 case FD_1440:
1364 if ( type != FD_1720
1365 && type != FD_1480
1366 && type != FD_1200
1367 && type != FD_820
1368 && type != FD_800
1369 && type != FD_720
1370 && type != FD_640
1371 )
1372 return(ENXIO);
1373 break;
1374 }
1375 }
1376
1377 /*
1378 * fd->type is the basic drive type, not the current format
1379 * we are reading. We only change the type when opening the
1380 * whole-slice-partition
1381 */
1382 if (changetype)
1383 fd->ft = fd_types[type - 1];
1384 fd->flags |= FD_OPEN;
1385
1386 /*
1387 * Clearing the DMA overrun counter at open time is a bit messy.
1388 * Since we're only managing one counter per controller, opening
1389 * the second drive could mess it up. Anyway, if the DMA overrun
1390 * condition is really persistent, it will eventually time out
1391 * still. OTOH, clearing it here will ensure we'll at least start
1392 * trying again after a previous (maybe even long ago) failure.
1393 * Also, this is merely a stop-gap measure only that should not
1394 * happen during normal operation, so we can tolerate it to be a
1395 * bit sloppy about this.
1396 */
1397 fdc->dma_overruns = 0;
1398
1399 /*
1400 * Set disk parameters for the disk management layer.
1401 *
1402 * Note that we do not set RAWEXTENSIONS here. We override
1403 * the minor numbers in the raw-extension range and handle them
1404 * directly.
1405 */
1406 bzero(&info, sizeof(info));
1407 ft = &fd->ft;
1408 info.d_media_blksize = 128 << ft->secsize;
1409 info.d_media_blocks = ft->size;
1410 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1411 info.d_nheads = ft->heads;
1412 info.d_secpertrack = ft->sectrac;
1413 info.d_secpercyl = ft->sectrac * ft->heads;
1414 info.d_ncylinders = ft->size / info.d_secpercyl;
1415 disk_setdiskinfo(&fd->disk, &info);
1416
1417 return 0;
1418 }
1419
1420 int
1421 fdclose(struct dev_close_args *ap)
1422 {
1423 cdev_t dev = ap->a_head.a_dev;
1424 fdu_t fdu = dkunit(dev);
1425 struct fd_data *fd;
1426
1427 fd = devclass_get_softc(fd_devclass, fdu);
1428 fd->flags &= ~FD_OPEN;
1429 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1430
1431 return (0);
1432 }
1433
1434 /****************************************************************************/
1435 /* fdstrategy */
1436 /****************************************************************************/
1437 int
1438 fdstrategy(struct dev_strategy_args *ap)
1439 {
1440 cdev_t dev = ap->a_head.a_dev;
1441 struct bio *bio = ap->a_bio;
1442 struct buf *bp = bio->bio_buf;
1443 unsigned nblocks, blknum, cando;
1444 fdu_t fdu;
1445 fdc_p fdc;
1446 fd_p fd;
1447 size_t fdblk;
1448
1449 fdu = dkunit(dev);
1450 fd = devclass_get_softc(fd_devclass, fdu);
1451 if (fd == 0)
1452 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1453 (u_long)major(dev), (u_long)minor(dev));
1454 fdc = fd->fdc;
1455 if (fd->type == NO_TYPE) {
1456 bp->b_error = ENXIO;
1457 bp->b_flags |= B_ERROR;
1458 goto bad;
1459 };
1460
1461 fdblk = 128 << (fd->ft.secsize);
1462 if (bp->b_cmd != BUF_CMD_FORMAT) {
1463 if (bio->bio_offset < 0) {
1464 kprintf(
1465 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n",
1466 fdu, bio->bio_offset, bp->b_bcount);
1467 bp->b_error = EINVAL;
1468 bp->b_flags |= B_ERROR;
1469 goto bad;
1470 }
1471 if ((bp->b_bcount % fdblk) != 0) {
1472 bp->b_error = EINVAL;
1473 bp->b_flags |= B_ERROR;
1474 goto bad;
1475 }
1476 }
1477
1478 /*
1479 * Set up block calculations.
1480 */
1481 if (bio->bio_offset > 20000000LL * fdblk) {
1482 /*
1483 * Reject unreasonably high block number, prevent the
1484 * multiplication below from overflowing.
1485 */
1486 bp->b_error = EINVAL;
1487 bp->b_flags |= B_ERROR;
1488 goto bad;
1489 }
1490 blknum = (unsigned)(bio->bio_offset / fdblk);
1491 nblocks = fd->ft.size;
1492 bp->b_resid = 0;
1493 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1494 if (blknum <= nblocks) {
1495 cando = (nblocks - blknum) * fdblk;
1496 bp->b_resid = bp->b_bcount - cando;
1497 if (cando == 0)
1498 goto bad; /* not actually bad but EOF */
1499 } else {
1500 bp->b_error = EINVAL;
1501 bp->b_flags |= B_ERROR;
1502 goto bad;
1503 }
1504 }
1505 crit_enter();
1506 bio->bio_driver_info = dev;
1507 bioqdisksort(&fdc->bio_queue, bio);
1508 callout_stop(&fd->toffhandle);
1509
1510 /* Tell devstat we are starting on the transaction */
1511 devstat_start_transaction(&fd->device_stats);
1512 device_busy(fd->dev);
1513
1514 fdstart(fdc);
1515 crit_exit();
1516 return(0);
1517
1518 bad:
1519 biodone(bio);
1520 return(0);
1521 }
1522
1523 /***************************************************************\
1524 * fdstart *
1525 * We have just queued something.. if the controller is not busy *
1526 * then simulate the case where it has just finished a command *
1527 * So that it (the interrupt routine) looks on the queue for more*
1528 * work to do and picks up what we just added. *
1529 * If the controller is already busy, we need do nothing, as it *
1530 * will pick up our work when the present work completes *
1531 \***************************************************************/
1532 static void
1533 fdstart(struct fdc_data *fdc)
1534 {
1535 crit_enter();
1536 if(fdc->state == DEVIDLE)
1537 {
1538 fdc_intr(fdc);
1539 }
1540 crit_exit();
1541 }
1542
1543 static void
1544 fd_iotimeout(void *xfdc)
1545 {
1546 fdc_p fdc;
1547
1548 fdc = xfdc;
1549 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1550
1551 /*
1552 * Due to IBM's brain-dead design, the FDC has a faked ready
1553 * signal, hardwired to ready == true. Thus, any command
1554 * issued if there's no diskette in the drive will _never_
1555 * complete, and must be aborted by resetting the FDC.
1556 * Many thanks, Big Blue!
1557 * The FDC must not be reset directly, since that would
1558 * interfere with the state machine. Instead, pretend that
1559 * the command completed but was invalid. The state machine
1560 * will reset the FDC and retry once.
1561 */
1562 crit_enter();
1563 fdc->status[0] = NE7_ST0_IC_IV;
1564 fdc->flags &= ~FDC_STAT_VALID;
1565 fdc->state = IOTIMEDOUT;
1566 fdc_intr(fdc);
1567 crit_exit();
1568 }
1569
1570 /* just ensure it is running in a critical section */
1571 static void
1572 fd_pseudointr(void *xfdc)
1573 {
1574 crit_enter();
1575 fdc_intr(xfdc);
1576 crit_exit();
1577 }
1578
1579 /***********************************************************************\
1580 * fdintr *
1581 * keep calling the state machine until it returns a 0 *
1582 * ALWAYS called at SPLBIO *
1583 \***********************************************************************/
1584 static void
1585 fdc_intr(void *xfdc)
1586 {
1587 fdc_p fdc = xfdc;
1588 while(fdstate(fdc))
1589 ;
1590 }
1591
1592 /*
1593 * magic pseudo-DMA initialization for YE FDC. Sets count and
1594 * direction
1595 */
1596 #define SET_BCDR(fdc,wr,cnt,port) \
1597 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1598 ((cnt)-1) & 0xff); \
1599 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1600 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1601
1602 /*
1603 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1604 */
1605 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
1606 {
1607 u_char *cptr = (u_char *)addr;
1608
1609 if (cmd == BUF_CMD_READ) {
1610 if (fdc->state != PIOREAD) {
1611 fdc->state = PIOREAD;
1612 return(0);
1613 };
1614 SET_BCDR(fdc, 0, count, 0);
1615 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1616 FDC_YE_DATAPORT, cptr, count);
1617 } else {
1618 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1619 FDC_YE_DATAPORT, cptr, count);
1620 SET_BCDR(fdc, 0, count, 0);
1621 };
1622 return(1);
1623 }
1624
1625 /***********************************************************************\
1626 * The controller state machine. *
1627 * if it returns a non zero value, it should be called again immediatly *
1628 \***********************************************************************/
1629 static int
1630 fdstate(fdc_p fdc)
1631 {
1632 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1633 unsigned blknum = 0, b_cylinder = 0;
1634 fdu_t fdu;
1635 fd_p fd;
1636 struct bio *bio;
1637 struct buf *bp;
1638 struct fd_formb *finfo = NULL;
1639 size_t fdblk;
1640 cdev_t dev;
1641
1642 bio = fdc->bio;
1643 if (bio == NULL) {
1644 bio = bioq_first(&fdc->bio_queue);
1645 if (bio != NULL) {
1646 bioq_remove(&fdc->bio_queue, bio);
1647 fdc->bio = bio;
1648 }
1649 }
1650 if (bio == NULL) {
1651 /***********************************************\
1652 * nothing left for this controller to do *
1653 * Force into the IDLE state, *
1654 \***********************************************/
1655 fdc->state = DEVIDLE;
1656 if (fdc->fd) {
1657 device_printf(fdc->fdc_dev,
1658 "unexpected valid fd pointer\n");
1659 fdc->fd = (fd_p) 0;
1660 fdc->fdu = -1;
1661 }
1662 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1663 return (0);
1664 }
1665 bp = bio->bio_buf;
1666 dev = bio->bio_driver_info;
1667
1668 fdu = dkunit(dev);
1669 fd = devclass_get_softc(fd_devclass, fdu);
1670 fdblk = 128 << fd->ft.secsize;
1671 if (fdc->fd && (fd != fdc->fd))
1672 device_printf(fd->dev, "confused fd pointers\n");
1673 read = (bp->b_cmd == BUF_CMD_READ);
1674 format = (bp->b_cmd == BUF_CMD_FORMAT);
1675 if (format) {
1676 finfo = (struct fd_formb *)bp->b_data;
1677 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1678 - (char *)finfo;
1679 }
1680 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1681 blknum = (unsigned)(bio->bio_offset / fdblk) +
1682 fd->skip /fdblk;
1683 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads);
1684 }
1685 TRACE1("fd%d", fdu);
1686 TRACE1("[%s]", fdstates[fdc->state]);
1687 TRACE1("(0x%x)", fd->flags);
1688 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
1689 switch (fdc->state)
1690 {
1691 case DEVIDLE:
1692 case FINDWORK: /* we have found new work */
1693 fdc->retry = 0;
1694 fd->skip = 0;
1695 fdc->fd = fd;
1696 fdc->fdu = fdu;
1697 fdc->fdctl_wr(fdc, fd->ft.trans);
1698 TRACE1("[0x%x->FDCTL]", fd->ft.trans);
1699 /*******************************************************\
1700 * If the next drive has a motor startup pending, then *
1701 * it will start up in its own good time *
1702 \*******************************************************/
1703 if(fd->flags & FD_MOTOR_WAIT) {
1704 fdc->state = MOTORWAIT;
1705 return (0); /* come back later */
1706 }
1707 /*******************************************************\
1708 * Maybe if it's not starting, it SHOULD be starting *
1709 \*******************************************************/
1710 if (!(fd->flags & FD_MOTOR))
1711 {
1712 fdc->state = MOTORWAIT;
1713 fd_turnon(fd);
1714 return (0);
1715 }
1716 else /* at least make sure we are selected */
1717 {
1718 set_motor(fdc, fd->fdsu, TURNON);
1719 }
1720 if (fdc->flags & FDC_NEEDS_RESET) {
1721 fdc->state = RESETCTLR;
1722 fdc->flags &= ~FDC_NEEDS_RESET;
1723 } else
1724 fdc->state = DOSEEK;
1725 break;
1726 case DOSEEK:
1727 if (b_cylinder == (unsigned)fd->track)
1728 {
1729 fdc->state = SEEKCOMPLETE;
1730 break;
1731 }
1732 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1733 fd->fdsu, b_cylinder * fd->ft.steptrac,
1734 0))
1735 {
1736 /*
1737 * seek command not accepted, looks like
1738 * the FDC went off to the Saints...
1739 */
1740 fdc->retry = 6; /* try a reset */
1741 return(retrier(fdc));
1742 }
1743 fd->track = FD_NO_TRACK;
1744 fdc->state = SEEKWAIT;
1745 return(0); /* will return later */
1746 case SEEKWAIT:
1747 /* allow heads to settle */
1748 callout_reset(&fdc->pseudointr_ch, hz / 16,
1749 fd_pseudointr, fdc);
1750 fdc->state = SEEKCOMPLETE;
1751 return(0); /* will return later */
1752 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1753 /* Make sure seek really happened*/
1754 if(fd->track == FD_NO_TRACK) {
1755 int descyl = b_cylinder * fd->ft.steptrac;
1756 do {
1757 /*
1758 * This might be a "ready changed" interrupt,
1759 * which cannot really happen since the
1760 * RDY pin is hardwired to + 5 volts. This
1761 * generally indicates a "bouncing" intr
1762 * line, so do one of the following:
1763 *
1764 * When running on an enhanced FDC that is
1765 * known to not go stuck after responding
1766 * with INVALID, fetch all interrupt states
1767 * until seeing either an INVALID or a
1768 * real interrupt condition.
1769 *
1770 * When running on a dumb old NE765, give
1771 * up immediately. The controller will
1772 * provide up to four dummy RC interrupt
1773 * conditions right after reset (for the
1774 * corresponding four drives), so this is
1775 * our only chance to get notice that it
1776 * was not the FDC that caused the interrupt.
1777 */
1778 if (fd_sense_int(fdc, &st0, &cyl)
1779 == FD_NOT_VALID)
1780 return 0;
1781 if(fdc->fdct == FDC_NE765
1782 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1783 return 0; /* hope for a real intr */
1784 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1785
1786 if (0 == descyl) {
1787 int failed = 0;
1788 /*
1789 * seek to cyl 0 requested; make sure we are
1790 * really there
1791 */
1792 if (fd_sense_drive_status(fdc, &st3))
1793 failed = 1;
1794 if ((st3 & NE7_ST3_T0) == 0) {
1795 kprintf(
1796 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1797 fdu, st3, NE7_ST3BITS);
1798 failed = 1;
1799 }
1800
1801 if (failed) {
1802 if(fdc->retry < 3)
1803 fdc->retry = 3;
1804 return (retrier(fdc));
1805 }
1806 }
1807
1808 if (cyl != descyl) {
1809 kprintf(
1810 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1811 fdu, descyl, cyl, st0);
1812 if (fdc->retry < 3)
1813 fdc->retry = 3;
1814 return (retrier(fdc));
1815 }
1816 }
1817
1818 fd->track = b_cylinder;
1819 if (!(fdc->flags & FDC_NODMA)) {
1820 isa_dmastart(isa_dmabp(bp),
1821 bp->b_data+fd->skip,
1822 format ? bp->b_bcount : fdblk, fdc->dmachan);
1823 }
1824 sectrac = fd->ft.sectrac;
1825 sec = blknum % (sectrac * fd->ft.heads);
1826 head = sec / sectrac;
1827 sec = sec % sectrac + 1;
1828 fd->hddrv = ((head&1)<<2)+fdu;
1829
1830 if(format || !read)
1831 {
1832 /* make sure the drive is writable */
1833 if(fd_sense_drive_status(fdc, &st3) != 0)
1834 {
1835 /* stuck controller? */
1836 if (!(fdc->flags & FDC_NODMA))
1837 isa_dmadone(isa_dmabp(bp),
1838 bp->b_data + fd->skip,
1839 format ? bp->b_bcount : fdblk,
1840 fdc->dmachan);
1841 fdc->retry = 6; /* reset the beast */
1842 return (retrier(fdc));
1843 }
1844 if(st3 & NE7_ST3_WP)
1845 {
1846 /*
1847 * XXX YES! this is ugly.
1848 * in order to force the current operation
1849 * to fail, we will have to fake an FDC
1850 * error - all error handling is done
1851 * by the retrier()
1852 */
1853 fdc->status[0] = NE7_ST0_IC_AT;
1854 fdc->status[1] = NE7_ST1_NW;
1855 fdc->status[2] = 0;
1856 fdc->status[3] = fd->track;
1857 fdc->status[4] = head;
1858 fdc->status[5] = sec;
1859 fdc->retry = 8; /* break out immediately */
1860 fdc->state = IOTIMEDOUT; /* not really... */
1861 return (1);
1862 }
1863 }
1864
1865 if (format) {
1866 if (fdc->flags & FDC_NODMA) {
1867 /*
1868 * This seems to be necessary for
1869 * whatever obscure reason; if we omit
1870 * it, we end up filling the sector ID
1871 * fields of the newly formatted track
1872 * entirely with garbage, causing
1873 * `wrong cylinder' errors all over
1874 * the place when trying to read them
1875 * back.
1876 *
1877 * Umpf.
1878 */
1879 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1880
1881 (void)fdcpio(fdc,bp->b_cmd,
1882 bp->b_data+fd->skip,
1883 bp->b_bcount);
1884
1885 }
1886 /* formatting */
1887 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1888 finfo->fd_formb_secshift,
1889 finfo->fd_formb_nsecs,
1890 finfo->fd_formb_gaplen,
1891 finfo->fd_formb_fillbyte, 0)) {
1892 /* controller fell over */
1893 if (!(fdc->flags & FDC_NODMA))
1894 isa_dmadone(isa_dmabp(bp),
1895 bp->b_data + fd->skip,
1896 format ? bp->b_bcount : fdblk,
1897 fdc->dmachan);
1898 fdc->retry = 6;
1899 return (retrier(fdc));
1900 }
1901 } else {
1902 if (fdc->flags & FDC_NODMA) {
1903 /*
1904 * this seems to be necessary even when
1905 * reading data
1906 */
1907 SET_BCDR(fdc, 1, fdblk, 0);
1908
1909 /*
1910 * perform the write pseudo-DMA before
1911 * the WRITE command is sent
1912 */
1913 if (!read)
1914 (void)fdcpio(fdc,bp->b_cmd,
1915 bp->b_data+fd->skip,
1916 fdblk);
1917 }
1918 if (fd_cmd(fdc, 9,
1919 (read ? NE7CMD_READ : NE7CMD_WRITE),
1920 head << 2 | fdu, /* head & unit */
1921 fd->track, /* track */
1922 head,
1923 sec, /* sector + 1 */
1924 fd->ft.secsize, /* sector size */
1925 sectrac, /* sectors/track */
1926 fd->ft.gap, /* gap size */
1927 fd->ft.datalen, /* data length */
1928 0)) {
1929 /* the beast is sleeping again */
1930 if (!(fdc->flags & FDC_NODMA))
1931 isa_dmadone(isa_dmabp(bp),
1932 bp->b_data + fd->skip,
1933 format ? bp->b_bcount : fdblk,
1934 fdc->dmachan);
1935 fdc->retry = 6;
1936 return (retrier(fdc));
1937 }
1938 }
1939 if (fdc->flags & FDC_NODMA)
1940 /*
1941 * if this is a read, then simply await interrupt
1942 * before performing PIO
1943 */
1944 if (read && !fdcpio(fdc,bp->b_cmd,
1945 bp->b_data+fd->skip,fdblk)) {
1946 callout_reset(&fd->tohandle, hz,
1947 fd_iotimeout, fdc);
1948 return(0); /* will return later */
1949 };
1950
1951 /*
1952 * write (or format) operation will fall through and
1953 * await completion interrupt
1954 */
1955 fdc->state = IOCOMPLETE;
1956 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
1957 return (0); /* will return later */
1958 case PIOREAD:
1959 /*
1960 * actually perform the PIO read. The IOCOMPLETE case
1961 * removes the timeout for us.
1962 */
1963 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
1964 fdc->state = IOCOMPLETE;
1965 /* FALLTHROUGH */
1966 case IOCOMPLETE: /* IO DONE, post-analyze */
1967 callout_stop(&fd->tohandle);
1968
1969 if (fd_read_status(fdc, fd->fdsu)) {
1970 if (!(fdc->flags & FDC_NODMA)) {
1971 isa_dmadone(isa_dmabp(bp),
1972 bp->b_data + fd->skip,
1973 format ? bp->b_bcount : fdblk,
1974 fdc->dmachan);
1975 }
1976 if (fdc->retry < 6)
1977 fdc->retry = 6; /* force a reset */
1978 return (retrier(fdc));
1979 }
1980
1981 fdc->state = IOTIMEDOUT;
1982
1983 /* FALLTHROUGH */
1984
1985 case IOTIMEDOUT:
1986 if (!(fdc->flags & FDC_NODMA)) {
1987 isa_dmadone(isa_dmabp(bp),
1988 bp->b_data + fd->skip,
1989 format ? bp->b_bcount : fdblk, fdc->dmachan);
1990 }
1991 if (fdc->status[0] & NE7_ST0_IC) {
1992 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1993 && fdc->status[1] & NE7_ST1_OR) {
1994 /*
1995 * DMA overrun. Someone hogged the bus and
1996 * didn't release it in time for the next
1997 * FDC transfer.
1998 *
1999 * We normally restart this without bumping
2000 * the retry counter. However, in case
2001 * something is seriously messed up (like
2002 * broken hardware), we rather limit the
2003 * number of retries so the IO operation
2004 * doesn't block indefinately.
2005 */
2006 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
2007 fdc->state = SEEKCOMPLETE;
2008 return (1);
2009 } /* else fall through */
2010 }
2011 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
2012 && fdc->retry < 6)
2013 fdc->retry = 6; /* force a reset */
2014 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2015 && fdc->status[2] & NE7_ST2_WC
2016 && fdc->retry < 3)
2017 fdc->retry = 3; /* force recalibrate */
2018 return (retrier(fdc));
2019 }
2020 /* All OK */
2021 /* Operation successful, retry DMA overruns again next time. */
2022 fdc->dma_overruns = 0;
2023 fd->skip += fdblk;
2024 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
2025 /* set up next transfer */
2026 fdc->state = DOSEEK;
2027 } else {
2028 /* ALL DONE */
2029 fd->skip = 0;
2030 fdc->bio = NULL;
2031 device_unbusy(fd->dev);
2032 devstat_end_transaction_buf(&fd->device_stats, bp);
2033 biodone(bio);
2034 fdc->fd = (fd_p) 0;
2035 fdc->fdu = -1;
2036 fdc->state = FINDWORK;
2037 }
2038 return (1);
2039 case RESETCTLR:
2040 fdc_reset(fdc);
2041 fdc->retry++;
2042 fdc->state = RESETCOMPLETE;
2043 return (0);
2044 case RESETCOMPLETE:
2045 /*
2046 * Discard all the results from the reset so that they
2047 * can't cause an unexpected interrupt later.
2048 */
2049 for (i = 0; i < 4; i++)
2050 (void)fd_sense_int(fdc, &st0, &cyl);
2051 fdc->state = STARTRECAL;
2052 /* Fall through. */
2053 case STARTRECAL:
2054 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
2055 /* arrgl */
2056 fdc->retry = 6;
2057 return (retrier(fdc));
2058 }
2059 fdc->state = RECALWAIT;
2060 return (0); /* will return later */
2061 case RECALWAIT:
2062 /* allow heads to settle */
2063 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
2064 fdc->state = RECALCOMPLETE;
2065 return (0); /* will return later */
2066 case RECALCOMPLETE:
2067 do {
2068 /*
2069 * See SEEKCOMPLETE for a comment on this:
2070 */
2071 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2072 return 0;
2073 if(fdc->fdct == FDC_NE765
2074 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2075 return 0; /* hope for a real intr */
2076 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2077 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2078 {
2079 if(fdc->retry > 3)
2080 /*
2081 * a recalibrate from beyond cylinder 77
2082 * will "fail" due to the FDC limitations;
2083 * since people used to complain much about
2084 * the failure message, try not logging
2085 * this one if it seems to be the first
2086 * time in a line
2087 */
2088 kprintf("fd%d: recal failed ST0 %b cyl %d\n",
2089 fdu, st0, NE7_ST0BITS, cyl);
2090 if(fdc->retry < 3) fdc->retry = 3;
2091 return (retrier(fdc));
2092 }
2093 fd->track = 0;
2094 /* Seek (probably) necessary */
2095 fdc->state = DOSEEK;
2096 return (1); /* will return immediatly */
2097 case MOTORWAIT:
2098 if(fd->flags & FD_MOTOR_WAIT)
2099 {
2100 return (0); /* time's not up yet */
2101 }
2102 if (fdc->flags & FDC_NEEDS_RESET) {
2103 fdc->state = RESETCTLR;
2104 fdc->flags &= ~FDC_NEEDS_RESET;
2105 } else {
2106 /*
2107 * If all motors were off, then the controller was
2108 * reset, so it has lost track of the current
2109 * cylinder. Recalibrate to handle this case.
2110 * But first, discard the results of the reset.
2111 */
2112 fdc->state = RESETCOMPLETE;
2113 }
2114 return (1); /* will return immediatly */
2115 default:
2116 device_printf(fdc->fdc_dev, "unexpected FD int->");
2117 if (fd_read_status(fdc, fd->fdsu) == 0)
2118 kprintf("FDC status :%x %x %x %x %x %x %x ",
2119 fdc->status[0],
2120 fdc->status[1],
2121 fdc->status[2],
2122 fdc->status[3],
2123 fdc->status[4],
2124 fdc->status[5],
2125 fdc->status[6] );
2126 else
2127 kprintf("No status available ");
2128 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2129 {
2130 kprintf("[controller is dead now]\n");
2131 return (0);
2132 }
2133 kprintf("ST0 = %x, PCN = %x\n", st0, cyl);
2134 return (0);
2135 }
2136 /*XXX confusing: some branches return immediately, others end up here*/
2137 return (1); /* Come back immediatly to new state */
2138 }
2139
2140 static int
2141 retrier(struct fdc_data *fdc)
2142 {
2143 struct bio *bio;
2144 struct buf *bp;
2145 struct fd_data *fd;
2146 cdev_t dev;
2147 int fdu;
2148
2149 bio = fdc->bio;
2150 bp = bio->bio_buf;
2151 dev = bio->bio_driver_info;
2152
2153 /* XXX shouldn't this be cached somewhere? */
2154 fdu = dkunit(dev);
2155 fd = devclass_get_softc(fd_devclass, fdu);
2156 if (fd->options & FDOPT_NORETRY)
2157 goto fail;
2158
2159 switch (fdc->retry) {
2160 case 0: case 1: case 2:
2161 fdc->state = SEEKCOMPLETE;
2162 break;
2163 case 3: case 4: case 5:
2164 fdc->state = STARTRECAL;
2165 break;
2166 case 6:
2167 fdc->state = RESETCTLR;
2168 break;
2169 case 7:
2170 break;
2171 default:
2172 fail:
2173 {
2174 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2175
2176 if (printerror) {
2177 /*
2178 * note: use the correct device for more
2179 * verbose error reporting.
2180 */
2181 diskerr(bio, dev,
2182 "hard error", LOG_PRINTF,
2183 fdc->fd->skip);
2184 }
2185 if (printerror) {
2186 if (fdc->flags & FDC_STAT_VALID)
2187 kprintf(
2188 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2189 fdc->status[0], NE7_ST0BITS,
2190 fdc->status[1], NE7_ST1BITS,
2191 fdc->status[2], NE7_ST2BITS,
2192 fdc->status[3], fdc->status[4],
2193 fdc->status[5]);
2194 else
2195 kprintf(" (No status)\n");
2196 }
2197 }
2198 bp->b_flags |= B_ERROR;
2199 bp->b_error = EIO;
2200 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2201 fdc->bio = NULL;
2202 fdc->fd->skip = 0;
2203 device_unbusy(fd->dev);
2204 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2205 biodone(bio);
2206 fdc->state = FINDWORK;
2207 fdc->flags |= FDC_NEEDS_RESET;
2208 fdc->fd = (fd_p) 0;
2209 fdc->fdu = -1;
2210 return (1);
2211 }
2212 fdc->retry++;
2213 return (1);
2214 }
2215
2216 static void
2217 fdformat_wakeup(struct bio *bio)
2218 {
2219 bio->bio_buf->b_cmd = BUF_CMD_DONE;
2220 wakeup(bio);
2221 }
2222
2223 static int
2224 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred)
2225 {
2226 fdu_t fdu;
2227 fd_p fd;
2228 struct buf *bp;
2229 int rv = 0;
2230 size_t fdblk;
2231
2232 fdu = dkunit(dev);
2233 fd = devclass_get_softc(fd_devclass, fdu);
2234 fdblk = 128 << fd->ft.secsize;
2235
2236 /* set up a buffer header for fdstrategy() */
2237 bp = getpbuf(NULL);
2238 bp->b_cmd = BUF_CMD_FORMAT;
2239
2240 /*
2241 * calculate a fake blkno, so fdstrategy() would initiate a
2242 * seek to the requested cylinder
2243 */
2244 bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
2245 (fd->ft.sectrac * fd->ft.heads)
2246 + finfo->head * fd->ft.sectrac) * fdblk;
2247 bp->b_bio1.bio_driver_info = dev;
2248 bp->b_bio1.bio_done = fdformat_wakeup;
2249
2250 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2251 bp->b_data = (caddr_t)finfo;
2252
2253 /* now do the format */
2254 dev_dstrategy(dev, &bp->b_bio1);
2255
2256 /* ...and wait for it to complete */
2257 crit_enter();
2258 while (bp->b_cmd != BUF_CMD_DONE) {
2259 rv = tsleep(&bp->b_bio1, 0, "fdform", 20 * hz);
2260 if (rv == EWOULDBLOCK)
2261 break;
2262 }
2263 crit_exit();
2264
2265 if (rv == EWOULDBLOCK) {
2266 /* timed out */
2267 rv = EIO;
2268 device_unbusy(fd->dev);
2269 biodone(&bp->b_bio1);
2270 }
2271 if (bp->b_flags & B_ERROR)
2272 rv = bp->b_error;
2273 /*
2274 * allow the process to be swapped
2275 */
2276 relpbuf(bp, NULL);
2277 return rv;
2278 }
2279
2280 /*
2281 * TODO: don't allocate buffer on stack.
2282 */
2283
2284 static int
2285 fdioctl(struct dev_ioctl_args *ap)
2286 {
2287 cdev_t dev = ap->a_head.a_dev;
2288 fdu_t fdu = dkunit(dev);
2289 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2290 struct fdc_status *fsp;
2291 int error = 0;
2292
2293 switch (ap->a_cmd) {
2294 case FD_FORM:
2295 if ((ap->a_fflag & FWRITE) == 0)
2296 error = EBADF; /* must be opened for writing */
2297 else if (((struct fd_formb *)ap->a_data)->format_version !=
2298 FD_FORMAT_VERSION)
2299 error = EINVAL; /* wrong version of formatting prog */
2300 else
2301 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred);
2302 break;
2303
2304 case FD_GTYPE: /* get drive type */
2305 *(struct fd_type *)ap->a_data = fd->ft;
2306 break;
2307
2308 case FD_STYPE: /* set drive type */
2309 /* this is considered harmful; only allow for superuser */
2310 if (suser_cred(ap->a_cred, 0) != 0)
2311 return EPERM;
2312 fd->ft = *(struct fd_type *)ap->a_data;
2313 break;
2314
2315 case FD_GOPTS: /* get drive options */
2316 *(int *)ap->a_data = fd->options;
2317 break;
2318
2319 case FD_SOPTS: /* set drive options */
2320 fd->options = *(int *)ap->a_data;
2321 break;
2322
2323 case FD_GSTAT:
2324 fsp = (struct fdc_status *)ap->a_data;
2325 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2326 return EINVAL;
2327 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2328 break;
2329
2330 default:
2331 error = ENOTTY;
2332 break;
2333 }
2334 return (error);
2335 }
2336
2337 /*
2338 * Hello emacs, these are the
2339 * Local Variables:
2340 * c-indent-level: 8
2341 * c-continued-statement-offset: 8
2342 * c-continued-brace-offset: 0
2343 * c-brace-offset: -8
2344 * c-brace-imaginary-offset: 0
2345 * c-argdecl-indent: 8
2346 * c-label-offset: -8
2347 * c++-hanging-braces: 1
2348 * c++-access-specifier-offset: -8
2349 * c++-empty-arglist-indent: 8
2350 * c++-friend-offset: 0
2351 * End:
2352 */
MP support for (parts of) the network stack