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/caps.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
fdout_wr(fdc_p fdc,u_int8_t v)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
fdsts_rd(fdc_p fdc)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
fddata_wr(fdc_p fdc,u_int8_t v)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
fddata_rd(fdc_p fdc)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
fdctl_wr_isa(fdc_p fdc,u_int8_t v)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
fdc_err(struct fdc_data * fdc,const char * s)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
fd_cmd(struct fdc_data * fdc,int n_out,...)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
enable_fifo(fdc_p fdc)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
fd_sense_drive_status(fdc_p fdc,int * st3p)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
fd_sense_int(fdc_p fdc,int * st0p,int * cylp)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
fd_read_status(fdc_p fdc,int fdsu)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
fdc_alloc_resources(struct fdc_data * fdc)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 == NULL) {
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 == NULL) {
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 == NULL) {
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 == NULL) {
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
fdc_release_resources(struct fdc_data * fdc)627 fdc_release_resources(struct fdc_data *fdc)
628 {
629 device_t dev;
630
631 dev = fdc->fdc_dev;
632 if (fdc->res_irq != NULL) {
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 != NULL) {
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 != NULL) {
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 != NULL) {
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
fdc_read_ivar(device_t dev,device_t child,int which,u_long * result)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
fdc_probe(device_t dev)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
fdc_add_child(device_t dev,const char * name,int unit)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
fdc_attach(device_t dev)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 error = isa_dma_acquire(fdc->dmachan);
799 if (!error) {
800 error = isa_dma_init(fdc->dmachan, 128 << 3 /* XXX max secsize */,
801 M_WAITOK);
802 if (error) {
803 isa_dma_release(fdc->dmachan);
804 device_printf(dev, "disabling dma\n");
805 fdc->flags |= FDC_NODMA;
806 }
807 }
808 }
809 fdc->state = DEVIDLE;
810
811 /* reset controller, turn motor off, clear fdout mirror reg */
812 fdout_wr(fdc, ((fdc->fdout = 0)));
813 bioq_init(&fdc->bio_queue);
814
815 /*
816 * Probe and attach any children. We should probably detect
817 * devices from the BIOS unless overridden.
818 */
819 for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
820 i != -1;
821 i = resource_query_string(i, "at", device_get_nameunit(dev)))
822 fdc_add_child(dev, resource_query_name(i),
823 resource_query_unit(i));
824
825 return (bus_generic_attach(dev));
826 }
827
828 int
fdc_print_child(device_t me,device_t child)829 fdc_print_child(device_t me, device_t child)
830 {
831 int retval = 0;
832
833 retval += bus_print_child_header(me, child);
834 retval += kprintf(" on %s drive %d\n", device_get_nameunit(me),
835 fdc_get_fdunit(child));
836
837 return (retval);
838 }
839
840 static device_method_t fdc_methods[] = {
841 /* Device interface */
842 DEVMETHOD(device_probe, fdc_probe),
843 DEVMETHOD(device_attach, fdc_attach),
844 DEVMETHOD(device_detach, bus_generic_detach),
845 DEVMETHOD(device_shutdown, bus_generic_shutdown),
846 DEVMETHOD(device_suspend, bus_generic_suspend),
847 DEVMETHOD(device_resume, bus_generic_resume),
848
849 /* Bus interface */
850 DEVMETHOD(bus_print_child, fdc_print_child),
851 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
852 /* Our children never use any other bus interface methods. */
853
854 DEVMETHOD_END
855 };
856
857 static driver_t fdc_driver = {
858 "fdc",
859 fdc_methods,
860 sizeof(struct fdc_data)
861 };
862
863 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, NULL, NULL);
864 #if 0
865 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, NULL, NULL);
866 #endif
867
868 /******************************************************************/
869 /*
870 * devices attached to the controller section.
871 */
872 static int
fd_probe(device_t dev)873 fd_probe(device_t dev)
874 {
875 int i;
876 u_int fdt, st0, st3;
877 struct fd_data *fd;
878 struct fdc_data *fdc;
879 fdsu_t fdsu;
880 static int fd_fifo = 0;
881
882 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
883 fd = device_get_softc(dev);
884 fdc = device_get_softc(device_get_parent(dev));
885
886 bzero(fd, sizeof *fd);
887 fd->dev = dev;
888 fd->fdc = fdc;
889 fd->fdsu = fdsu;
890 fd->fdu = device_get_unit(dev);
891
892 #ifdef __x86_64__
893 /* look up what bios thinks we have */
894 switch (fd->fdu) {
895 case 0:
896 if ((fdc->flags & FDC_ISPCMCIA))
897 fdt = RTCFDT_144M;
898 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
899 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
900 else
901 fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
902 break;
903 case 1:
904 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
905 break;
906 default:
907 fdt = RTCFDT_NONE;
908 break;
909 }
910 #else
911 fdt = RTCFDT_144M; /* XXX probably */
912 #endif
913
914 /* is there a unit? */
915 if (fdt == RTCFDT_NONE)
916 return (ENXIO);
917
918 /* select it */
919 set_motor(fdc, fdsu, TURNON);
920 DELAY(1000000); /* 1 sec */
921
922 /* XXX This doesn't work before the first set_motor() */
923 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
924 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
925 && enable_fifo(fdc) == 0) {
926 device_printf(device_get_parent(dev),
927 "FIFO enabled, %d bytes threshold\n", fifo_threshold);
928 }
929 fd_fifo = 1;
930
931 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
932 && (st3 & NE7_ST3_T0)) {
933 /* if at track 0, first seek inwards */
934 /* seek some steps: */
935 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
936 DELAY(300000); /* ...wait a moment... */
937 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
938 }
939
940 /* If we're at track 0 first seek inwards. */
941 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
942 /* Seek some steps... */
943 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
944 /* ...wait a moment... */
945 DELAY(300000);
946 /* make ctrlr happy: */
947 fd_sense_int(fdc, 0, 0);
948 }
949 }
950
951 for (i = 0; i < 2; i++) {
952 /*
953 * we must recalibrate twice, just in case the
954 * heads have been beyond cylinder 76, since most
955 * FDCs still barf when attempting to recalibrate
956 * more than 77 steps
957 */
958 /* go back to 0: */
959 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
960 /* a second being enough for full stroke seek*/
961 DELAY(i == 0 ? 1000000 : 300000);
962
963 /* anything responding? */
964 if (fd_sense_int(fdc, &st0, 0) == 0 &&
965 (st0 & NE7_ST0_EC) == 0)
966 break; /* already probed succesfully */
967 }
968 }
969
970 set_motor(fdc, fdsu, TURNOFF);
971
972 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
973 return (ENXIO);
974
975 fd->track = FD_NO_TRACK;
976 fd->fdc = fdc;
977 fd->fdsu = fdsu;
978 fd->options = 0;
979 callout_init(&fd->toffhandle);
980 callout_init(&fd->tohandle);
981 callout_init(&fd->motor);
982
983 switch (fdt) {
984 case RTCFDT_12M:
985 device_set_desc(dev, "1200-KB 5.25\" drive");
986 fd->type = FD_1200;
987 break;
988 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
989 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
990 fd->type = FD_1440;
991 break;
992 case RTCFDT_144M:
993 device_set_desc(dev, "1440-KB 3.5\" drive");
994 fd->type = FD_1440;
995 break;
996 case RTCFDT_288M:
997 case RTCFDT_288M_1:
998 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
999 fd->type = FD_1440;
1000 break;
1001 case RTCFDT_360K:
1002 device_set_desc(dev, "360-KB 5.25\" drive");
1003 fd->type = FD_360;
1004 break;
1005 case RTCFDT_720K:
1006 kprintf("720-KB 3.5\" drive");
1007 fd->type = FD_720;
1008 break;
1009 default:
1010 return (ENXIO);
1011 }
1012 fd->ft = fd_types[fd->type - 1];
1013 return (0);
1014 }
1015
1016 static int
fd_attach(device_t dev)1017 fd_attach(device_t dev)
1018 {
1019 struct disk_info info;
1020 struct fd_data *fd;
1021 struct fd_type *ft;
1022
1023 fd = device_get_softc(dev);
1024
1025 disk_create(fd->fdu, &fd->disk, &fd_ops);
1026 disk_setdisktype(&fd->disk, "floppy");
1027
1028 /*
1029 * Make special raw floppy devices with preset types to
1030 * make formatting easier. These override the disk management
1031 * layer for the whole-slice-disk for partitions 128-191. Note
1032 * that we do not override partition 255, which is the
1033 * whole-slice-part. If we did we would have to provide our
1034 * own DIOCGPART ioctl.
1035 */
1036 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 1),
1037 UID_ROOT, GID_WHEEL, 0600, "fd%d.1720", fd->fdu);
1038 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 2),
1039 UID_ROOT, GID_WHEEL, 0600, "fd%d.1480", fd->fdu);
1040 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 3),
1041 UID_ROOT, GID_WHEEL, 0600, "fd%d.1440", fd->fdu);
1042 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 4),
1043 UID_ROOT, GID_WHEEL, 0600, "fd%d.1200", fd->fdu);
1044 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 5),
1045 UID_ROOT, GID_WHEEL, 0600, "fd%d.820", fd->fdu);
1046 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 6),
1047 UID_ROOT, GID_WHEEL, 0600, "fd%d.800", fd->fdu);
1048 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 7),
1049 UID_ROOT, GID_WHEEL, 0600, "fd%d.720", fd->fdu);
1050 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 8),
1051 UID_ROOT, GID_WHEEL, 0600, "fd%d.360", fd->fdu);
1052 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 9),
1053 UID_ROOT, GID_WHEEL, 0600, "fd%d.640", fd->fdu);
1054 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 10),
1055 UID_ROOT, GID_WHEEL, 0600, "fd%d.1232", fd->fdu);
1056
1057 devstat_add_entry(&fd->device_stats, device_get_name(dev),
1058 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1059 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1060 DEVSTAT_PRIORITY_FD);
1061
1062 if (fd->type != NO_TYPE) {
1063 bzero(&info, sizeof(info));
1064 ft = &fd_types[fd->type - 1];
1065 info.d_media_blksize = 128 << ft->secsize;
1066 info.d_media_blocks = ft->size;
1067 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1068 info.d_nheads = ft->heads;
1069 info.d_secpertrack = ft->sectrac;
1070 info.d_secpercyl = ft->sectrac * ft->heads;
1071 info.d_ncylinders = ft->size / info.d_secpercyl;
1072 disk_setdiskinfo(&fd->disk, &info);
1073 }
1074 return (0);
1075 }
1076
1077 static int
fd_detach(device_t dev)1078 fd_detach(device_t dev)
1079 {
1080 struct fd_data *fd;
1081
1082 fd = device_get_softc(dev);
1083 kprintf("devfs: Please make sure that only the right fd device was removed!!!\n");
1084 dev_ops_remove_minor(&fd_ops,
1085 /*dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),*/
1086 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128));
1087 disk_invalidate(&fd->disk);
1088 disk_destroy(&fd->disk);
1089 devstat_remove_entry(&fd->device_stats);
1090 callout_stop(&fd->toffhandle);
1091 callout_stop(&fd->motor);
1092
1093 return (0);
1094 }
1095
1096 static device_method_t fd_methods[] = {
1097 /* Device interface */
1098 DEVMETHOD(device_probe, fd_probe),
1099 DEVMETHOD(device_attach, fd_attach),
1100 DEVMETHOD(device_detach, fd_detach),
1101 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1102 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
1103 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
1104
1105 DEVMETHOD_END
1106 };
1107
1108 static driver_t fd_driver = {
1109 "fd",
1110 fd_methods,
1111 sizeof(struct fd_data)
1112 };
1113
1114 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, NULL, NULL);
1115
1116 /****************************************************************************/
1117 /* motor control stuff */
1118 /* remember to not deselect the drive we're working on */
1119 /****************************************************************************/
1120 static void
set_motor(struct fdc_data * fdc,int fdsu,int turnon)1121 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1122 {
1123 int fdout = fdc->fdout;
1124 int needspecify = 0;
1125
1126 if(turnon) {
1127 fdout &= ~FDO_FDSEL;
1128 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1129 } else
1130 fdout &= ~(FDO_MOEN0 << fdsu);
1131
1132 if(!turnon
1133 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1134 /* gonna turn off the last drive, put FDC to bed */
1135 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1136 else {
1137 /* make sure controller is selected and specified */
1138 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1139 needspecify = 1;
1140 fdout |= (FDO_FRST|FDO_FDMAEN);
1141 }
1142
1143 fdout_wr(fdc, fdout);
1144 fdc->fdout = fdout;
1145 TRACE1("[0x%x->FDOUT]", fdout);
1146
1147 if (needspecify) {
1148 /*
1149 * XXX
1150 * special case: since we have just woken up the FDC
1151 * from its sleep, we silently assume the command will
1152 * be accepted, and do not test for a timeout
1153 */
1154 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1155 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1156 0);
1157 if (fdc->flags & FDC_HAS_FIFO)
1158 (void) enable_fifo(fdc);
1159 }
1160 }
1161
1162 static void
fd_turnoff(void * xfd)1163 fd_turnoff(void *xfd)
1164 {
1165 fd_p fd = xfd;
1166
1167 TRACE1("[fd%d: turnoff]", fd->fdu);
1168
1169 crit_enter();
1170 /*
1171 * Don't turn off the motor yet if the drive is active.
1172 *
1173 * If we got here, this could only mean we missed an interrupt.
1174 * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1175 * after a controller reset. Just schedule a pseudo-interrupt
1176 * so the state machine gets re-entered.
1177 */
1178 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1179 fdc_intr(fd->fdc);
1180 crit_exit();
1181 return;
1182 }
1183
1184 fd->flags &= ~FD_MOTOR;
1185 set_motor(fd->fdc, fd->fdsu, TURNOFF);
1186 crit_exit();
1187 }
1188
1189 static void
fd_motor_on(void * xfd)1190 fd_motor_on(void *xfd)
1191 {
1192 fd_p fd = xfd;
1193
1194 crit_enter();
1195 fd->flags &= ~FD_MOTOR_WAIT;
1196 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1197 {
1198 fdc_intr(fd->fdc);
1199 }
1200 crit_exit();
1201 }
1202
1203 static void
fd_turnon(fd_p fd)1204 fd_turnon(fd_p fd)
1205 {
1206 if(!(fd->flags & FD_MOTOR))
1207 {
1208 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1209 set_motor(fd->fdc, fd->fdsu, TURNON);
1210 callout_reset(&fd->motor, hz, fd_motor_on, fd);
1211 }
1212 }
1213
1214 static void
fdc_reset(fdc_p fdc)1215 fdc_reset(fdc_p fdc)
1216 {
1217 /* Try a reset, keep motor on */
1218 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1219 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1220 DELAY(100);
1221 /* enable FDC, but defer interrupts a moment */
1222 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1223 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1224 DELAY(100);
1225 fdout_wr(fdc, fdc->fdout);
1226 TRACE1("[0x%x->FDOUT]", fdc->fdout);
1227
1228 /* XXX after a reset, silently believe the FDC will accept commands */
1229 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1230 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1231 0);
1232 if (fdc->flags & FDC_HAS_FIFO)
1233 (void) enable_fifo(fdc);
1234 }
1235
1236 /****************************************************************************/
1237 /* fdc in/out */
1238 /****************************************************************************/
1239 /*
1240 * FDC IO functions, take care of the main status register, timeout
1241 * in case the desired status bits are never set.
1242 *
1243 * These PIO loops initially start out with short delays between
1244 * each iteration in the expectation that the required condition
1245 * is usually met quickly, so it can be handled immediately. After
1246 * about 1 ms, stepping is increased to achieve a better timing
1247 * accuracy in the calls to DELAY().
1248 */
1249 static int
fd_in(struct fdc_data * fdc,int * ptr)1250 fd_in(struct fdc_data *fdc, int *ptr)
1251 {
1252 int i, j, step;
1253
1254 for (j = 0, step = 1;
1255 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1256 j < FDSTS_TIMEOUT;
1257 j += step) {
1258 if (i == NE7_RQM)
1259 return (fdc_err(fdc, "ready for output in input\n"));
1260 if (j == 1000)
1261 step = 1000;
1262 DELAY(step);
1263 }
1264 if (j >= FDSTS_TIMEOUT)
1265 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1266 #ifdef FDC_DEBUG
1267 i = fddata_rd(fdc);
1268 TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1269 *ptr = i;
1270 return (0);
1271 #else /* !FDC_DEBUG */
1272 i = fddata_rd(fdc);
1273 if (ptr)
1274 *ptr = i;
1275 return (0);
1276 #endif /* FDC_DEBUG */
1277 }
1278
1279 static int
out_fdc(struct fdc_data * fdc,int x)1280 out_fdc(struct fdc_data *fdc, int x)
1281 {
1282 int i, j, step;
1283
1284 for (j = 0, step = 1;
1285 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1286 j < FDSTS_TIMEOUT;
1287 j += step) {
1288 if (i == (NE7_DIO|NE7_RQM))
1289 return (fdc_err(fdc, "ready for input in output\n"));
1290 if (j == 1000)
1291 step = 1000;
1292 DELAY(step);
1293 }
1294 if (j >= FDSTS_TIMEOUT)
1295 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1296
1297 /* Send the command and return */
1298 fddata_wr(fdc, x);
1299 TRACE1("[0x%x->FDDATA]", x);
1300 return (0);
1301 }
1302
1303 /****************************************************************************/
1304 /* fdopen/fdclose */
1305 /****************************************************************************/
1306 int
Fdopen(struct dev_open_args * ap)1307 Fdopen(struct dev_open_args *ap)
1308 {
1309 cdev_t dev = ap->a_head.a_dev;
1310 fdu_t fdu = dkunit(dev);
1311 struct disk_info info;
1312 struct fd_type *ft;
1313 int type;
1314 int changetype;
1315 fd_p fd;
1316 fdc_p fdc;
1317
1318 /* check bounds */
1319 if ((fd = devclass_get_softc(fd_devclass, fdu)) == NULL)
1320 return (ENXIO);
1321 fdc = fd->fdc;
1322 if ((fdc == NULL) || (fd->type == NO_TYPE))
1323 return (ENXIO);
1324
1325 /*
1326 * Figure out the type of floppy. There are special whole-disk-device
1327 * overrides that will override the current type.
1328 */
1329 type = dkpart(dev);
1330 if (type == WHOLE_SLICE_PART) {
1331 type = fd->type; /* do not change selected type data */
1332 changetype = 0;
1333 } else if (type > 128) {
1334 type -= 128; /* set to specific format */
1335 changetype = 1;
1336 } else {
1337 type = fd->type; /* reset to default */
1338 changetype = 1;
1339 }
1340 if (type > NUMDENS)
1341 return (ENXIO);
1342 if (type != fd->type) {
1343 /*
1344 * For each type of basic drive, make sure we are trying
1345 * to open a type it can do,
1346 */
1347 switch (fd->type) {
1348 case FD_360:
1349 return (ENXIO);
1350 case FD_720:
1351 if ( type != FD_820
1352 && type != FD_800
1353 && type != FD_640
1354 )
1355 return (ENXIO);
1356 break;
1357 case FD_1200:
1358 switch (type) {
1359 case FD_1480:
1360 type = FD_1480in5_25;
1361 break;
1362 case FD_1440:
1363 type = FD_1440in5_25;
1364 break;
1365 case FD_1232:
1366 break;
1367 case FD_820:
1368 type = FD_820in5_25;
1369 break;
1370 case FD_800:
1371 type = FD_800in5_25;
1372 break;
1373 case FD_720:
1374 type = FD_720in5_25;
1375 break;
1376 case FD_640:
1377 type = FD_640in5_25;
1378 break;
1379 case FD_360:
1380 type = FD_360in5_25;
1381 break;
1382 default:
1383 return(ENXIO);
1384 }
1385 break;
1386 case FD_1440:
1387 if ( type != FD_1720
1388 && type != FD_1480
1389 && type != FD_1200
1390 && type != FD_820
1391 && type != FD_800
1392 && type != FD_720
1393 && type != FD_640
1394 )
1395 return(ENXIO);
1396 break;
1397 }
1398 }
1399
1400 /*
1401 * fd->type is the basic drive type, not the current format
1402 * we are reading. We only change the type when opening the
1403 * whole-slice-partition
1404 */
1405 if (changetype)
1406 fd->ft = fd_types[type - 1];
1407 fd->flags |= FD_OPEN;
1408
1409 /*
1410 * Clearing the DMA overrun counter at open time is a bit messy.
1411 * Since we're only managing one counter per controller, opening
1412 * the second drive could mess it up. Anyway, if the DMA overrun
1413 * condition is really persistent, it will eventually time out
1414 * still. OTOH, clearing it here will ensure we'll at least start
1415 * trying again after a previous (maybe even long ago) failure.
1416 * Also, this is merely a stop-gap measure only that should not
1417 * happen during normal operation, so we can tolerate it to be a
1418 * bit sloppy about this.
1419 */
1420 fdc->dma_overruns = 0;
1421
1422 /*
1423 * Set disk parameters for the disk management layer.
1424 *
1425 * Note that we do not set RAWEXTENSIONS here. We override
1426 * the minor numbers in the raw-extension range and handle them
1427 * directly.
1428 */
1429 bzero(&info, sizeof(info));
1430 ft = &fd->ft;
1431 info.d_media_blksize = 128 << ft->secsize;
1432 info.d_media_blocks = ft->size;
1433 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1434 info.d_nheads = ft->heads;
1435 info.d_secpertrack = ft->sectrac;
1436 info.d_secpercyl = ft->sectrac * ft->heads;
1437 info.d_ncylinders = ft->size / info.d_secpercyl;
1438 disk_setdiskinfo(&fd->disk, &info);
1439
1440 return 0;
1441 }
1442
1443 int
fdclose(struct dev_close_args * ap)1444 fdclose(struct dev_close_args *ap)
1445 {
1446 cdev_t dev = ap->a_head.a_dev;
1447 fdu_t fdu = dkunit(dev);
1448 struct fd_data *fd;
1449
1450 fd = devclass_get_softc(fd_devclass, fdu);
1451 fd->flags &= ~FD_OPEN;
1452 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1453
1454 return (0);
1455 }
1456
1457 /****************************************************************************/
1458 /* fdstrategy */
1459 /****************************************************************************/
1460 int
fdstrategy(struct dev_strategy_args * ap)1461 fdstrategy(struct dev_strategy_args *ap)
1462 {
1463 cdev_t dev = ap->a_head.a_dev;
1464 struct bio *bio = ap->a_bio;
1465 struct buf *bp = bio->bio_buf;
1466 unsigned nblocks, blknum, cando;
1467 fdu_t fdu;
1468 fdc_p fdc;
1469 fd_p fd;
1470 size_t fdblk;
1471
1472 fdu = dkunit(dev);
1473 fd = devclass_get_softc(fd_devclass, fdu);
1474 if (fd == NULL)
1475 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1476 (u_long)major(dev), (u_long)minor(dev));
1477 fdc = fd->fdc;
1478 if (fd->type == NO_TYPE) {
1479 bp->b_error = ENXIO;
1480 bp->b_flags |= B_ERROR;
1481 goto bad;
1482 }
1483
1484 fdblk = 128 << (fd->ft.secsize);
1485 if (bp->b_cmd != BUF_CMD_FORMAT) {
1486 if (bio->bio_offset < 0) {
1487 kprintf(
1488 "fd%d: fdstrat: bad request offset = %"PRId64", bcount = %d\n",
1489 fdu, bio->bio_offset, bp->b_bcount);
1490 bp->b_error = EINVAL;
1491 bp->b_flags |= B_ERROR;
1492 goto bad;
1493 }
1494 if ((bp->b_bcount % fdblk) != 0) {
1495 bp->b_error = EINVAL;
1496 bp->b_flags |= B_ERROR;
1497 goto bad;
1498 }
1499 }
1500
1501 /*
1502 * Set up block calculations.
1503 */
1504 if (bio->bio_offset > 20000000LL * fdblk) {
1505 /*
1506 * Reject unreasonably high block number, prevent the
1507 * multiplication below from overflowing.
1508 */
1509 bp->b_error = EINVAL;
1510 bp->b_flags |= B_ERROR;
1511 goto bad;
1512 }
1513 blknum = (unsigned)(bio->bio_offset / fdblk);
1514 nblocks = fd->ft.size;
1515 bp->b_resid = 0;
1516 if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1517 if (blknum <= nblocks) {
1518 cando = (nblocks - blknum) * fdblk;
1519 bp->b_resid = bp->b_bcount - cando;
1520 if (cando == 0)
1521 goto bad; /* not actually bad but EOF */
1522 } else {
1523 bp->b_error = EINVAL;
1524 bp->b_flags |= B_ERROR;
1525 goto bad;
1526 }
1527 }
1528 crit_enter();
1529 bio->bio_driver_info = dev;
1530 bioqdisksort(&fdc->bio_queue, bio);
1531 callout_stop(&fd->toffhandle);
1532
1533 /* Tell devstat we are starting on the transaction */
1534 devstat_start_transaction(&fd->device_stats);
1535 #if 0
1536 device_busy(fd->dev);
1537 #endif
1538 fdstart(fdc);
1539 crit_exit();
1540 return(0);
1541
1542 bad:
1543 biodone(bio);
1544 return(0);
1545 }
1546
1547 /***************************************************************\
1548 * fdstart *
1549 * We have just queued something.. if the controller is not busy *
1550 * then simulate the case where it has just finished a command *
1551 * So that it (the interrupt routine) looks on the queue for more*
1552 * work to do and picks up what we just added. *
1553 * If the controller is already busy, we need do nothing, as it *
1554 * will pick up our work when the present work completes *
1555 \***************************************************************/
1556 static void
fdstart(struct fdc_data * fdc)1557 fdstart(struct fdc_data *fdc)
1558 {
1559 crit_enter();
1560 if(fdc->state == DEVIDLE)
1561 {
1562 fdc_intr(fdc);
1563 }
1564 crit_exit();
1565 }
1566
1567 static void
fd_iotimeout(void * xfdc)1568 fd_iotimeout(void *xfdc)
1569 {
1570 fdc_p fdc;
1571
1572 fdc = xfdc;
1573 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1574
1575 /*
1576 * Due to IBM's brain-dead design, the FDC has a faked ready
1577 * signal, hardwired to ready == true. Thus, any command
1578 * issued if there's no diskette in the drive will _never_
1579 * complete, and must be aborted by resetting the FDC.
1580 * Many thanks, Big Blue!
1581 * The FDC must not be reset directly, since that would
1582 * interfere with the state machine. Instead, pretend that
1583 * the command completed but was invalid. The state machine
1584 * will reset the FDC and retry once.
1585 */
1586 crit_enter();
1587 fdc->status[0] = NE7_ST0_IC_IV;
1588 fdc->flags &= ~FDC_STAT_VALID;
1589 fdc->state = IOTIMEDOUT;
1590 fdc_intr(fdc);
1591 crit_exit();
1592 }
1593
1594 /* just ensure it is running in a critical section */
1595 static void
fd_pseudointr(void * xfdc)1596 fd_pseudointr(void *xfdc)
1597 {
1598 crit_enter();
1599 fdc_intr(xfdc);
1600 crit_exit();
1601 }
1602
1603 /***********************************************************************\
1604 * fdintr *
1605 * keep calling the state machine until it returns a 0 *
1606 * ALWAYS called at SPLBIO *
1607 \***********************************************************************/
1608 static void
fdc_intr(void * xfdc)1609 fdc_intr(void *xfdc)
1610 {
1611 fdc_p fdc = xfdc;
1612 while(fdstate(fdc))
1613 ;
1614 }
1615
1616 /*
1617 * magic pseudo-DMA initialization for YE FDC. Sets count and
1618 * direction
1619 */
1620 #define SET_BCDR(fdc,wr,cnt,port) \
1621 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
1622 ((cnt)-1) & 0xff); \
1623 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1624 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1625
1626 /*
1627 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1628 */
fdcpio(fdc_p fdc,buf_cmd_t cmd,caddr_t addr,u_int count)1629 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
1630 {
1631 u_char *cptr = (u_char *)addr;
1632
1633 if (cmd == BUF_CMD_READ) {
1634 if (fdc->state != PIOREAD) {
1635 fdc->state = PIOREAD;
1636 return(0);
1637 }
1638 SET_BCDR(fdc, 0, count, 0);
1639 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1640 FDC_YE_DATAPORT, cptr, count);
1641 } else {
1642 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1643 FDC_YE_DATAPORT, cptr, count);
1644 SET_BCDR(fdc, 0, count, 0);
1645 }
1646 return(1);
1647 }
1648
1649 /***********************************************************************\
1650 * The controller state machine. *
1651 * if it returns a non zero value, it should be called again immediatly *
1652 \***********************************************************************/
1653 static int
fdstate(fdc_p fdc)1654 fdstate(fdc_p fdc)
1655 {
1656 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1657 unsigned blknum = 0, b_cylinder = 0;
1658 fdu_t fdu;
1659 fd_p fd;
1660 struct bio *bio;
1661 struct buf *bp;
1662 struct fd_formb *finfo = NULL;
1663 size_t fdblk;
1664 cdev_t dev;
1665
1666 bio = fdc->bio;
1667 if (bio == NULL) {
1668 bio = bioq_first(&fdc->bio_queue);
1669 if (bio != NULL) {
1670 bioq_remove(&fdc->bio_queue, bio);
1671 fdc->bio = bio;
1672 }
1673 }
1674 if (bio == NULL) {
1675 /***********************************************\
1676 * nothing left for this controller to do *
1677 * Force into the IDLE state, *
1678 \***********************************************/
1679 fdc->state = DEVIDLE;
1680 if (fdc->fd) {
1681 device_printf(fdc->fdc_dev,
1682 "unexpected valid fd pointer\n");
1683 fdc->fd = (fd_p) 0;
1684 fdc->fdu = -1;
1685 }
1686 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1687 return (0);
1688 }
1689 bp = bio->bio_buf;
1690 dev = bio->bio_driver_info;
1691
1692 fdu = dkunit(dev);
1693 fd = devclass_get_softc(fd_devclass, fdu);
1694 fdblk = 128 << fd->ft.secsize;
1695 if (fdc->fd && (fd != fdc->fd))
1696 device_printf(fd->dev, "confused fd pointers\n");
1697 read = (bp->b_cmd == BUF_CMD_READ);
1698 format = (bp->b_cmd == BUF_CMD_FORMAT);
1699 if (format) {
1700 finfo = (struct fd_formb *)bp->b_data;
1701 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1702 - (char *)finfo;
1703 }
1704 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1705 blknum = (unsigned)(bio->bio_offset / fdblk) +
1706 fd->skip /fdblk;
1707 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads);
1708 }
1709 TRACE1("fd%d", fdu);
1710 TRACE1("[%s]", fdstates[fdc->state]);
1711 TRACE1("(0x%x)", fd->flags);
1712 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
1713 switch (fdc->state)
1714 {
1715 case DEVIDLE:
1716 case FINDWORK: /* we have found new work */
1717 fdc->retry = 0;
1718 fd->skip = 0;
1719 fdc->fd = fd;
1720 fdc->fdu = fdu;
1721 fdc->fdctl_wr(fdc, fd->ft.trans);
1722 TRACE1("[0x%x->FDCTL]", fd->ft.trans);
1723 /*******************************************************\
1724 * If the next drive has a motor startup pending, then *
1725 * it will start up in its own good time *
1726 \*******************************************************/
1727 if(fd->flags & FD_MOTOR_WAIT) {
1728 fdc->state = MOTORWAIT;
1729 return (0); /* come back later */
1730 }
1731 /*******************************************************\
1732 * Maybe if it's not starting, it SHOULD be starting *
1733 \*******************************************************/
1734 if (!(fd->flags & FD_MOTOR))
1735 {
1736 fdc->state = MOTORWAIT;
1737 fd_turnon(fd);
1738 return (0);
1739 }
1740 else /* at least make sure we are selected */
1741 {
1742 set_motor(fdc, fd->fdsu, TURNON);
1743 }
1744 if (fdc->flags & FDC_NEEDS_RESET) {
1745 fdc->state = RESETCTLR;
1746 fdc->flags &= ~FDC_NEEDS_RESET;
1747 } else
1748 fdc->state = DOSEEK;
1749 break;
1750 case DOSEEK:
1751 if (b_cylinder == (unsigned)fd->track)
1752 {
1753 fdc->state = SEEKCOMPLETE;
1754 break;
1755 }
1756 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1757 fd->fdsu, b_cylinder * fd->ft.steptrac,
1758 0))
1759 {
1760 /*
1761 * seek command not accepted, looks like
1762 * the FDC went off to the Saints...
1763 */
1764 fdc->retry = 6; /* try a reset */
1765 return(retrier(fdc));
1766 }
1767 fd->track = FD_NO_TRACK;
1768 fdc->state = SEEKWAIT;
1769 return(0); /* will return later */
1770 case SEEKWAIT:
1771 /* allow heads to settle */
1772 callout_reset(&fdc->pseudointr_ch, hz / 16,
1773 fd_pseudointr, fdc);
1774 fdc->state = SEEKCOMPLETE;
1775 return(0); /* will return later */
1776 case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1777 /* Make sure seek really happened*/
1778 if(fd->track == FD_NO_TRACK) {
1779 int descyl = b_cylinder * fd->ft.steptrac;
1780 do {
1781 /*
1782 * This might be a "ready changed" interrupt,
1783 * which cannot really happen since the
1784 * RDY pin is hardwired to + 5 volts. This
1785 * generally indicates a "bouncing" intr
1786 * line, so do one of the following:
1787 *
1788 * When running on an enhanced FDC that is
1789 * known to not go stuck after responding
1790 * with INVALID, fetch all interrupt states
1791 * until seeing either an INVALID or a
1792 * real interrupt condition.
1793 *
1794 * When running on a dumb old NE765, give
1795 * up immediately. The controller will
1796 * provide up to four dummy RC interrupt
1797 * conditions right after reset (for the
1798 * corresponding four drives), so this is
1799 * our only chance to get notice that it
1800 * was not the FDC that caused the interrupt.
1801 */
1802 if (fd_sense_int(fdc, &st0, &cyl)
1803 == FD_NOT_VALID)
1804 return 0;
1805 if(fdc->fdct == FDC_NE765
1806 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1807 return 0; /* hope for a real intr */
1808 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1809
1810 if (0 == descyl) {
1811 int failed = 0;
1812 /*
1813 * seek to cyl 0 requested; make sure we are
1814 * really there
1815 */
1816 if (fd_sense_drive_status(fdc, &st3))
1817 failed = 1;
1818 if ((st3 & NE7_ST3_T0) == 0) {
1819 kprintf(
1820 "fd%d: Seek to cyl 0, but not really there (ST3 = %pb%i)\n",
1821 fdu, NE7_ST3BITS, st3);
1822 failed = 1;
1823 }
1824
1825 if (failed) {
1826 if(fdc->retry < 3)
1827 fdc->retry = 3;
1828 return (retrier(fdc));
1829 }
1830 }
1831
1832 if (cyl != descyl) {
1833 kprintf(
1834 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1835 fdu, descyl, cyl, st0);
1836 if (fdc->retry < 3)
1837 fdc->retry = 3;
1838 return (retrier(fdc));
1839 }
1840 }
1841
1842 fd->track = b_cylinder;
1843 if (!(fdc->flags & FDC_NODMA)) {
1844 isa_dmastart(isa_dmabp(bp),
1845 bp->b_data+fd->skip,
1846 format ? bp->b_bcount : fdblk, fdc->dmachan);
1847 }
1848 sectrac = fd->ft.sectrac;
1849 sec = blknum % (sectrac * fd->ft.heads);
1850 head = sec / sectrac;
1851 sec = sec % sectrac + 1;
1852 fd->hddrv = ((head&1)<<2)+fdu;
1853
1854 if(format || !read)
1855 {
1856 /* make sure the drive is writable */
1857 if(fd_sense_drive_status(fdc, &st3) != 0)
1858 {
1859 /* stuck controller? */
1860 if (!(fdc->flags & FDC_NODMA))
1861 isa_dmadone(isa_dmabp(bp),
1862 bp->b_data + fd->skip,
1863 format ? bp->b_bcount : fdblk,
1864 fdc->dmachan);
1865 fdc->retry = 6; /* reset the beast */
1866 return (retrier(fdc));
1867 }
1868 if(st3 & NE7_ST3_WP)
1869 {
1870 /*
1871 * XXX YES! this is ugly.
1872 * in order to force the current operation
1873 * to fail, we will have to fake an FDC
1874 * error - all error handling is done
1875 * by the retrier()
1876 */
1877 fdc->status[0] = NE7_ST0_IC_AT;
1878 fdc->status[1] = NE7_ST1_NW;
1879 fdc->status[2] = 0;
1880 fdc->status[3] = fd->track;
1881 fdc->status[4] = head;
1882 fdc->status[5] = sec;
1883 fdc->retry = 8; /* break out immediately */
1884 fdc->state = IOTIMEDOUT; /* not really... */
1885 return (1);
1886 }
1887 }
1888
1889 if (format) {
1890 if (fdc->flags & FDC_NODMA) {
1891 /*
1892 * This seems to be necessary for
1893 * whatever obscure reason; if we omit
1894 * it, we end up filling the sector ID
1895 * fields of the newly formatted track
1896 * entirely with garbage, causing
1897 * `wrong cylinder' errors all over
1898 * the place when trying to read them
1899 * back.
1900 *
1901 * Umpf.
1902 */
1903 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1904
1905 (void)fdcpio(fdc,bp->b_cmd,
1906 bp->b_data+fd->skip,
1907 bp->b_bcount);
1908
1909 }
1910 /* formatting */
1911 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
1912 finfo->fd_formb_secshift,
1913 finfo->fd_formb_nsecs,
1914 finfo->fd_formb_gaplen,
1915 finfo->fd_formb_fillbyte, 0)) {
1916 /* controller fell over */
1917 if (!(fdc->flags & FDC_NODMA))
1918 isa_dmadone(isa_dmabp(bp),
1919 bp->b_data + fd->skip,
1920 format ? bp->b_bcount : fdblk,
1921 fdc->dmachan);
1922 fdc->retry = 6;
1923 return (retrier(fdc));
1924 }
1925 } else {
1926 if (fdc->flags & FDC_NODMA) {
1927 /*
1928 * this seems to be necessary even when
1929 * reading data
1930 */
1931 SET_BCDR(fdc, 1, fdblk, 0);
1932
1933 /*
1934 * perform the write pseudo-DMA before
1935 * the WRITE command is sent
1936 */
1937 if (!read)
1938 (void)fdcpio(fdc,bp->b_cmd,
1939 bp->b_data+fd->skip,
1940 fdblk);
1941 }
1942 if (fd_cmd(fdc, 9,
1943 (read ? NE7CMD_READ : NE7CMD_WRITE),
1944 head << 2 | fdu, /* head & unit */
1945 fd->track, /* track */
1946 head,
1947 sec, /* sector + 1 */
1948 fd->ft.secsize, /* sector size */
1949 sectrac, /* sectors/track */
1950 fd->ft.gap, /* gap size */
1951 fd->ft.datalen, /* data length */
1952 0)) {
1953 /* the beast is sleeping again */
1954 if (!(fdc->flags & FDC_NODMA))
1955 isa_dmadone(isa_dmabp(bp),
1956 bp->b_data + fd->skip,
1957 format ? bp->b_bcount : fdblk,
1958 fdc->dmachan);
1959 fdc->retry = 6;
1960 return (retrier(fdc));
1961 }
1962 }
1963 if (fdc->flags & FDC_NODMA)
1964 /*
1965 * if this is a read, then simply await interrupt
1966 * before performing PIO
1967 */
1968 if (read && !fdcpio(fdc,bp->b_cmd,
1969 bp->b_data+fd->skip,fdblk)) {
1970 callout_reset(&fd->tohandle, hz,
1971 fd_iotimeout, fdc);
1972 return(0); /* will return later */
1973 }
1974
1975 /*
1976 * write (or format) operation will fall through and
1977 * await completion interrupt
1978 */
1979 fdc->state = IOCOMPLETE;
1980 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
1981 return (0); /* will return later */
1982 case PIOREAD:
1983 /*
1984 * actually perform the PIO read. The IOCOMPLETE case
1985 * removes the timeout for us.
1986 */
1987 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
1988 fdc->state = IOCOMPLETE;
1989 /* FALLTHROUGH */
1990 case IOCOMPLETE: /* IO DONE, post-analyze */
1991 callout_stop(&fd->tohandle);
1992
1993 if (fd_read_status(fdc, fd->fdsu)) {
1994 if (!(fdc->flags & FDC_NODMA)) {
1995 isa_dmadone(isa_dmabp(bp),
1996 bp->b_data + fd->skip,
1997 format ? bp->b_bcount : fdblk,
1998 fdc->dmachan);
1999 }
2000 if (fdc->retry < 6)
2001 fdc->retry = 6; /* force a reset */
2002 return (retrier(fdc));
2003 }
2004
2005 fdc->state = IOTIMEDOUT;
2006
2007 /* FALLTHROUGH */
2008
2009 case IOTIMEDOUT:
2010 if (!(fdc->flags & FDC_NODMA)) {
2011 isa_dmadone(isa_dmabp(bp),
2012 bp->b_data + fd->skip,
2013 format ? bp->b_bcount : fdblk, fdc->dmachan);
2014 }
2015 if (fdc->status[0] & NE7_ST0_IC) {
2016 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2017 && fdc->status[1] & NE7_ST1_OR) {
2018 /*
2019 * DMA overrun. Someone hogged the bus and
2020 * didn't release it in time for the next
2021 * FDC transfer.
2022 *
2023 * We normally restart this without bumping
2024 * the retry counter. However, in case
2025 * something is seriously messed up (like
2026 * broken hardware), we rather limit the
2027 * number of retries so the IO operation
2028 * doesn't block indefinately.
2029 */
2030 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
2031 fdc->state = SEEKCOMPLETE;
2032 return (1);
2033 } /* else fall through */
2034 }
2035 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
2036 && fdc->retry < 6)
2037 fdc->retry = 6; /* force a reset */
2038 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2039 && fdc->status[2] & NE7_ST2_WC
2040 && fdc->retry < 3)
2041 fdc->retry = 3; /* force recalibrate */
2042 return (retrier(fdc));
2043 }
2044 /* All OK */
2045 /* Operation successful, retry DMA overruns again next time. */
2046 fdc->dma_overruns = 0;
2047 fd->skip += fdblk;
2048 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
2049 /* set up next transfer */
2050 fdc->state = DOSEEK;
2051 } else {
2052 /* ALL DONE */
2053 fd->skip = 0;
2054 fdc->bio = NULL;
2055 #if 0
2056 device_unbusy(fd->dev);
2057 #endif
2058 devstat_end_transaction_buf(&fd->device_stats, bp);
2059 biodone(bio);
2060 fdc->fd = (fd_p) 0;
2061 fdc->fdu = -1;
2062 fdc->state = FINDWORK;
2063 }
2064 return (1);
2065 case RESETCTLR:
2066 fdc_reset(fdc);
2067 fdc->retry++;
2068 fdc->state = RESETCOMPLETE;
2069 return (0);
2070 case RESETCOMPLETE:
2071 /*
2072 * Discard all the results from the reset so that they
2073 * can't cause an unexpected interrupt later.
2074 */
2075 for (i = 0; i < 4; i++)
2076 (void)fd_sense_int(fdc, &st0, &cyl);
2077 fdc->state = STARTRECAL;
2078 /* Fall through. */
2079 case STARTRECAL:
2080 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
2081 /* arrgl */
2082 fdc->retry = 6;
2083 return (retrier(fdc));
2084 }
2085 fdc->state = RECALWAIT;
2086 return (0); /* will return later */
2087 case RECALWAIT:
2088 /* allow heads to settle */
2089 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
2090 fdc->state = RECALCOMPLETE;
2091 return (0); /* will return later */
2092 case RECALCOMPLETE:
2093 do {
2094 /*
2095 * See SEEKCOMPLETE for a comment on this:
2096 */
2097 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2098 return 0;
2099 if(fdc->fdct == FDC_NE765
2100 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2101 return 0; /* hope for a real intr */
2102 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2103 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2104 {
2105 if(fdc->retry > 3)
2106 /*
2107 * a recalibrate from beyond cylinder 77
2108 * will "fail" due to the FDC limitations;
2109 * since people used to complain much about
2110 * the failure message, try not logging
2111 * this one if it seems to be the first
2112 * time in a line
2113 */
2114 kprintf("fd%d: recal failed ST0 %pb%i cyl %d\n",
2115 fdu, NE7_ST0BITS, st0, cyl);
2116 if(fdc->retry < 3) fdc->retry = 3;
2117 return (retrier(fdc));
2118 }
2119 fd->track = 0;
2120 /* Seek (probably) necessary */
2121 fdc->state = DOSEEK;
2122 return (1); /* will return immediatly */
2123 case MOTORWAIT:
2124 if(fd->flags & FD_MOTOR_WAIT)
2125 {
2126 return (0); /* time's not up yet */
2127 }
2128 if (fdc->flags & FDC_NEEDS_RESET) {
2129 fdc->state = RESETCTLR;
2130 fdc->flags &= ~FDC_NEEDS_RESET;
2131 } else {
2132 /*
2133 * If all motors were off, then the controller was
2134 * reset, so it has lost track of the current
2135 * cylinder. Recalibrate to handle this case.
2136 * But first, discard the results of the reset.
2137 */
2138 fdc->state = RESETCOMPLETE;
2139 }
2140 return (1); /* will return immediatly */
2141 default:
2142 device_printf(fdc->fdc_dev, "unexpected FD int->");
2143 if (fd_read_status(fdc, fd->fdsu) == 0)
2144 kprintf("FDC status :%x %x %x %x %x %x %x ",
2145 fdc->status[0],
2146 fdc->status[1],
2147 fdc->status[2],
2148 fdc->status[3],
2149 fdc->status[4],
2150 fdc->status[5],
2151 fdc->status[6] );
2152 else
2153 kprintf("No status available ");
2154 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2155 {
2156 kprintf("[controller is dead now]\n");
2157 return (0);
2158 }
2159 kprintf("ST0 = %x, PCN = %x\n", st0, cyl);
2160 return (0);
2161 }
2162 /*XXX confusing: some branches return immediately, others end up here*/
2163 return (1); /* Come back immediatly to new state */
2164 }
2165
2166 static int
retrier(struct fdc_data * fdc)2167 retrier(struct fdc_data *fdc)
2168 {
2169 struct bio *bio;
2170 struct buf *bp;
2171 struct fd_data *fd;
2172 cdev_t dev;
2173 int fdu;
2174
2175 bio = fdc->bio;
2176 bp = bio->bio_buf;
2177 dev = bio->bio_driver_info;
2178
2179 /* XXX shouldn't this be cached somewhere? */
2180 fdu = dkunit(dev);
2181 fd = devclass_get_softc(fd_devclass, fdu);
2182 if (fd->options & FDOPT_NORETRY)
2183 goto fail;
2184
2185 switch (fdc->retry) {
2186 case 0: case 1: case 2:
2187 fdc->state = SEEKCOMPLETE;
2188 break;
2189 case 3: case 4: case 5:
2190 fdc->state = STARTRECAL;
2191 break;
2192 case 6:
2193 fdc->state = RESETCTLR;
2194 break;
2195 case 7:
2196 break;
2197 default:
2198 fail:
2199 {
2200 int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2201
2202 if (printerror) {
2203 /*
2204 * note: use the correct device for more
2205 * verbose error reporting.
2206 */
2207 diskerr(bio, dev,
2208 "hard error", LOG_PRINTF,
2209 fdc->fd->skip);
2210 }
2211 if (printerror) {
2212 if (fdc->flags & FDC_STAT_VALID)
2213 kprintf(
2214 " (ST0 %pb%i ST1 %pb%i ST2 %pb%i cyl %u hd %u sec %u)\n",
2215 NE7_ST0BITS, fdc->status[0],
2216 NE7_ST1BITS, fdc->status[1],
2217 NE7_ST2BITS, fdc->status[2],
2218 fdc->status[3], fdc->status[4],
2219 fdc->status[5]);
2220 else
2221 kprintf(" (No status)\n");
2222 }
2223 }
2224 bp->b_flags |= B_ERROR;
2225 bp->b_error = EIO;
2226 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2227 fdc->bio = NULL;
2228 fdc->fd->skip = 0;
2229 #if 0
2230 device_unbusy(fd->dev);
2231 #endif
2232 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2233 biodone(bio);
2234 fdc->state = FINDWORK;
2235 fdc->flags |= FDC_NEEDS_RESET;
2236 fdc->fd = (fd_p) 0;
2237 fdc->fdu = -1;
2238 return (1);
2239 }
2240 fdc->retry++;
2241 return (1);
2242 }
2243
2244 static int
fdformat(cdev_t dev,struct fd_formb * finfo,struct ucred * cred)2245 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred)
2246 {
2247 fdu_t fdu;
2248 fd_p fd;
2249 struct buf *bp;
2250 int rv = 0;
2251 size_t fdblk;
2252
2253 fdu = dkunit(dev);
2254 fd = devclass_get_softc(fd_devclass, fdu);
2255 fdblk = 128 << fd->ft.secsize;
2256
2257 /* set up a buffer header for fdstrategy() */
2258 bp = getpbuf(NULL);
2259 bp->b_cmd = BUF_CMD_FORMAT;
2260
2261 /*
2262 * calculate a fake blkno, so fdstrategy() would initiate a
2263 * seek to the requested cylinder
2264 */
2265 bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
2266 (fd->ft.sectrac * fd->ft.heads)
2267 + finfo->head * fd->ft.sectrac) * fdblk;
2268 bp->b_bio1.bio_driver_info = dev;
2269 bp->b_bio1.bio_flags |= BIO_SYNC;
2270 bp->b_bio1.bio_done = biodone_sync;
2271
2272 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2273 bp->b_data = (caddr_t)finfo;
2274
2275 /* now do the format */
2276 dev_dstrategy(dev, &bp->b_bio1);
2277
2278 /* ...and wait for it to complete */
2279 rv = biowait_timeout(&bp->b_bio1, "fdform", 20 * hz);
2280 if (rv == EWOULDBLOCK) {
2281 /* timed out */
2282 rv = EIO;
2283 #if 0
2284 device_unbusy(fd->dev);
2285 #endif
2286 biodone(&bp->b_bio1);
2287 }
2288 if (bp->b_flags & B_ERROR)
2289 rv = bp->b_error;
2290 /*
2291 * allow the process to be swapped
2292 */
2293 relpbuf(bp, NULL);
2294 return rv;
2295 }
2296
2297 /*
2298 * TODO: don't allocate buffer on stack.
2299 */
2300
2301 static int
fdioctl(struct dev_ioctl_args * ap)2302 fdioctl(struct dev_ioctl_args *ap)
2303 {
2304 cdev_t dev = ap->a_head.a_dev;
2305 fdu_t fdu = dkunit(dev);
2306 fd_p fd = devclass_get_softc(fd_devclass, fdu);
2307 struct fdc_status *fsp;
2308 int error = 0;
2309
2310 switch (ap->a_cmd) {
2311 case FD_FORM:
2312 if ((ap->a_fflag & FWRITE) == 0)
2313 error = EBADF; /* must be opened for writing */
2314 else if (((struct fd_formb *)ap->a_data)->format_version !=
2315 FD_FORMAT_VERSION)
2316 error = EINVAL; /* wrong version of formatting prog */
2317 else
2318 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred);
2319 break;
2320
2321 case FD_GTYPE: /* get drive type */
2322 *(struct fd_type *)ap->a_data = fd->ft;
2323 break;
2324
2325 case FD_STYPE: /* set drive type */
2326 /* this is considered harmful; only allow for superuser */
2327 if (caps_priv_check(ap->a_cred, SYSCAP_RESTRICTEDROOT))
2328 return EPERM;
2329 fd->ft = *(struct fd_type *)ap->a_data;
2330 break;
2331
2332 case FD_GOPTS: /* get drive options */
2333 *(int *)ap->a_data = fd->options;
2334 break;
2335
2336 case FD_SOPTS: /* set drive options */
2337 fd->options = *(int *)ap->a_data;
2338 break;
2339
2340 case FD_GSTAT:
2341 fsp = (struct fdc_status *)ap->a_data;
2342 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2343 return EINVAL;
2344 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2345 break;
2346
2347 default:
2348 error = ENOTTY;
2349 break;
2350 }
2351 return (error);
2352 }
2353