472e47bcd575ff53d5437fc02e3f464319f8a940
[dragonfly.git] / sys / dev / disk / fd / fd.c
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 1.8 2003/07/22 17:03:32 dillon Exp $
55  *
56  */
57
58 #include "opt_fdc.h"
59 #include "card.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/disklabel.h>
69 #include <sys/devicestat.h>
70 #include <sys/fcntl.h>
71 #include <sys/malloc.h>
72 #include <sys/module.h>
73 #include <sys/proc.h>
74 #include <sys/syslog.h>
75 #include <sys/device.h>
76
77 #include <sys/bus.h>
78 #include <machine/bus.h>
79 #include <sys/rman.h>
80
81 #include <sys/buf2.h>
82
83 #include <machine/clock.h>
84 #include <machine/ioctl_fd.h>
85 #include <machine/resource.h>
86 #include <machine/stdarg.h>
87
88 #include <isa/isavar.h>
89 #include <isa/isareg.h>
90 #include <isa/fdreg.h>
91 #include <isa/fdc.h>
92 #include <isa/rtc.h>
93
94 /* misuse a flag to identify format operation */
95 #define B_FORMAT B_XXX
96
97 /* configuration flags */
98 #define FDC_PRETEND_D0  (1 << 0)        /* pretend drive 0 to be there */
99 #define FDC_NO_FIFO     (1 << 2)        /* do not enable FIFO  */
100
101 /* internally used only, not really from CMOS: */
102 #define RTCFDT_144M_PRETENDED   0x1000
103
104 /* error returns for fd_cmd() */
105 #define FD_FAILED -1
106 #define FD_NOT_VALID -2
107 #define FDC_ERRMAX      100     /* do not log more */
108 /*
109  * Stop retrying after this many DMA overruns.  Since each retry takes
110  * one revolution, with 300 rpm., 25 retries take approximately 10
111  * seconds which the read attempt will block in case the DMA overrun
112  * is persistent.
113  */
114 #define FDC_DMAOV_MAX   25
115
116 /*
117  * Timeout value for the PIO loops to wait until the FDC main status
118  * register matches our expectations (request for master, direction
119  * bit).  This is supposed to be a number of microseconds, although
120  * timing might actually not be very accurate.
121  *
122  * Timeouts of 100 msec are believed to be required for some broken
123  * (old) hardware.
124  */
125 #define FDSTS_TIMEOUT   100000
126
127 #define NUMTYPES 17
128 #define NUMDENS  (NUMTYPES - 7)
129
130 /* These defines (-1) must match index for fd_types */
131 #define F_TAPE_TYPE     0x020   /* bit for fd_types to indicate tape */
132 #define NO_TYPE         0       /* must match NO_TYPE in ft.c */
133 #define FD_1720         1
134 #define FD_1480         2
135 #define FD_1440         3
136 #define FD_1200         4
137 #define FD_820          5
138 #define FD_800          6
139 #define FD_720          7
140 #define FD_360          8
141 #define FD_640          9
142 #define FD_1232         10
143
144 #define FD_1480in5_25   11
145 #define FD_1440in5_25   12
146 #define FD_820in5_25    13
147 #define FD_800in5_25    14
148 #define FD_720in5_25    15
149 #define FD_360in5_25    16
150 #define FD_640in5_25    17
151
152
153 static struct fd_type fd_types[NUMTYPES] =
154 {
155 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
156 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
157 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
158 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /*  1.2M in HD 5.25/3.5 */
159 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /*  820K in HD 3.5in */
160 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /*  800K in HD 3.5in */
161 {  9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /*  720K in HD 3.5in */
162 {  9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /*  360K in DD 5.25in */
163 {  8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /*  640K in DD 5.25in */
164 {  8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
165
166 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
167 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
168 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /*  820K in HD 5.25in */
169 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /*  800K in HD 5.25in */
170 {  9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /*  720K in HD 5.25in */
171 {  9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /*  360K in HD 5.25in */
172 {  8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /*  640K in HD 5.25in */
173 };
174
175 #define DRVS_PER_CTLR 2         /* 2 floppies */
176
177 /***********************************************************************\
178 * Per controller structure.                                             *
179 \***********************************************************************/
180 static devclass_t fdc_devclass;
181
182 /***********************************************************************\
183 * Per drive structure.                                                  *
184 * N per controller  (DRVS_PER_CTLR)                                     *
185 \***********************************************************************/
186 struct fd_data {
187         struct  fdc_data *fdc;  /* pointer to controller structure */
188         int     fdsu;           /* this units number on this controller */
189         int     type;           /* Drive type (FD_1440...) */
190         struct  fd_type *ft;    /* pointer to the type descriptor */
191         int     flags;
192 #define FD_OPEN         0x01    /* it's open            */
193 #define FD_ACTIVE       0x02    /* it's active          */
194 #define FD_MOTOR        0x04    /* motor should be on   */
195 #define FD_MOTOR_WAIT   0x08    /* motor coming up      */
196         int     skip;
197         int     hddrv;
198 #define FD_NO_TRACK -2
199         int     track;          /* where we think the head is */
200         int     options;        /* user configurable options, see ioctl_fd.h */
201         struct  callout_handle toffhandle;
202         struct  callout_handle tohandle;
203         struct  devstat device_stats;
204         device_t dev;
205         fdu_t   fdu;
206 };
207
208 struct fdc_ivars {
209         int     fdunit;
210 };
211 static devclass_t fd_devclass;
212
213 /***********************************************************************\
214 * Throughout this file the following conventions will be used:          *
215 * fd is a pointer to the fd_data struct for the drive in question       *
216 * fdc is a pointer to the fdc_data struct for the controller            *
217 * fdu is the floppy drive unit number                                   *
218 * fdcu is the floppy controller unit number                             *
219 * fdsu is the floppy drive unit number on that controller. (sub-unit)   *
220 \***********************************************************************/
221
222 /* internal functions */
223 static  void fdc_intr(void *);
224 static void set_motor(struct fdc_data *, int, int);
225 #  define TURNON 1
226 #  define TURNOFF 0
227 static timeout_t fd_turnoff;
228 static timeout_t fd_motor_on;
229 static void fd_turnon(struct fd_data *);
230 static void fdc_reset(fdc_p);
231 static int fd_in(struct fdc_data *, int *);
232 static int out_fdc(struct fdc_data *, int);
233 static void fdstart(struct fdc_data *);
234 static timeout_t fd_iotimeout;
235 static timeout_t fd_pseudointr;
236 static int fdstate(struct fdc_data *);
237 static int retrier(struct fdc_data *);
238 static int fdformat(dev_t, struct fd_formb *, struct thread *);
239
240 static int enable_fifo(fdc_p fdc);
241
242 static int fifo_threshold = 8;  /* XXX: should be accessible via sysctl */
243
244
245 #define DEVIDLE         0
246 #define FINDWORK        1
247 #define DOSEEK          2
248 #define SEEKCOMPLETE    3
249 #define IOCOMPLETE      4
250 #define RECALCOMPLETE   5
251 #define STARTRECAL      6
252 #define RESETCTLR       7
253 #define SEEKWAIT        8
254 #define RECALWAIT       9
255 #define MOTORWAIT       10
256 #define IOTIMEDOUT      11
257 #define RESETCOMPLETE   12
258 #define PIOREAD         13
259
260 #ifdef  FDC_DEBUG
261 static char const * const fdstates[] =
262 {
263 "DEVIDLE",
264 "FINDWORK",
265 "DOSEEK",
266 "SEEKCOMPLETE",
267 "IOCOMPLETE",
268 "RECALCOMPLETE",
269 "STARTRECAL",
270 "RESETCTLR",
271 "SEEKWAIT",
272 "RECALWAIT",
273 "MOTORWAIT",
274 "IOTIMEDOUT",
275 "RESETCOMPLETE",
276 "PIOREAD",
277 };
278
279 /* CAUTION: fd_debug causes huge amounts of logging output */
280 static int volatile fd_debug = 0;
281 #define TRACE0(arg) if(fd_debug) printf(arg)
282 #define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2)
283 #else /* FDC_DEBUG */
284 #define TRACE0(arg)
285 #define TRACE1(arg1, arg2)
286 #endif /* FDC_DEBUG */
287
288 static void
289 fdout_wr(fdc_p fdc, u_int8_t v)
290 {
291         bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
292 }
293
294 static u_int8_t
295 fdsts_rd(fdc_p fdc)
296 {
297         return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
298 }
299
300 static void
301 fddata_wr(fdc_p fdc, u_int8_t v)
302 {
303         bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
304 }
305
306 static u_int8_t
307 fddata_rd(fdc_p fdc)
308 {
309         return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
310 }
311
312 static void
313 fdctl_wr_isa(fdc_p fdc, u_int8_t v)
314 {
315         bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
316 }
317
318 #if NCARD > 0
319 static void
320 fdctl_wr_pcmcia(fdc_p fdc, u_int8_t v)
321 {
322         bus_space_write_1(fdc->portt, fdc->porth, FDCTL+fdc->port_off, v);
323 }
324 #endif
325
326 #if 0
327
328 static u_int8_t
329 fdin_rd(fdc_p fdc)
330 {
331         return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
332 }
333
334 #endif
335
336 static  d_open_t        Fdopen; /* NOTE, not fdopen */
337 static  d_close_t       fdclose;
338 static  d_ioctl_t       fdioctl;
339 static  d_strategy_t    fdstrategy;
340
341 static struct cdevsw fd_cdevsw = {
342         /* name */      "fd",
343         /* maj */       FD_CDEV_MAJOR,
344         /* flags */     D_DISK,
345         /* port */      NULL,
346         /* autoq */     0,
347
348         /* open */      Fdopen,
349         /* close */     fdclose,
350         /* read */      physread,
351         /* write */     physwrite,
352         /* ioctl */     fdioctl,
353         /* poll */      nopoll,
354         /* mmap */      nommap,
355         /* strategy */  fdstrategy,
356         /* dump */      nodump,
357         /* psize */     nopsize
358 };
359
360 static int
361 fdc_err(struct fdc_data *fdc, const char *s)
362 {
363         fdc->fdc_errs++;
364         if (s) {
365                 if (fdc->fdc_errs < FDC_ERRMAX)
366                         device_printf(fdc->fdc_dev, "%s", s);
367                 else if (fdc->fdc_errs == FDC_ERRMAX)
368                         device_printf(fdc->fdc_dev, "too many errors, not "
369                                                     "logging any more\n");
370         }
371
372         return FD_FAILED;
373 }
374
375 /*
376  * fd_cmd: Send a command to the chip.  Takes a varargs with this structure:
377  * Unit number,
378  * # of output bytes, output bytes as ints ...,
379  * # of input bytes, input bytes as ints ...
380  */
381 static int
382 fd_cmd(struct fdc_data *fdc, int n_out, ...)
383 {
384         u_char cmd;
385         int n_in;
386         int n;
387         va_list ap;
388
389         va_start(ap, n_out);
390         cmd = (u_char)(va_arg(ap, int));
391         va_end(ap);
392         va_start(ap, n_out);
393         for (n = 0; n < n_out; n++)
394         {
395                 if (out_fdc(fdc, va_arg(ap, int)) < 0)
396                 {
397                         char msg[50];
398                         snprintf(msg, sizeof(msg),
399                                 "cmd %x failed at out byte %d of %d\n",
400                                 cmd, n + 1, n_out);
401                         return fdc_err(fdc, msg);
402                 }
403         }
404         n_in = va_arg(ap, int);
405         for (n = 0; n < n_in; n++)
406         {
407                 int *ptr = va_arg(ap, int *);
408                 if (fd_in(fdc, ptr) < 0)
409                 {
410                         char msg[50];
411                         snprintf(msg, sizeof(msg),
412                                 "cmd %02x failed at in byte %d of %d\n",
413                                 cmd, n + 1, n_in);
414                         return fdc_err(fdc, msg);
415                 }
416         }
417
418         return 0;
419 }
420
421 static int 
422 enable_fifo(fdc_p fdc)
423 {
424         int i, j;
425
426         if ((fdc->flags & FDC_HAS_FIFO) == 0) {
427                 
428                 /*
429                  * XXX: 
430                  * Cannot use fd_cmd the normal way here, since
431                  * this might be an invalid command. Thus we send the
432                  * first byte, and check for an early turn of data directon.
433                  */
434                 
435                 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
436                         return fdc_err(fdc, "Enable FIFO failed\n");
437                 
438                 /* If command is invalid, return */
439                 j = FDSTS_TIMEOUT;
440                 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
441                        != NE7_RQM && j-- > 0) {
442                         if (i == (NE7_DIO | NE7_RQM)) {
443                                 fdc_reset(fdc);
444                                 return FD_FAILED;
445                         }
446                         DELAY(1);
447                 }
448                 if (j<0 || 
449                     fd_cmd(fdc, 3,
450                            0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
451                         fdc_reset(fdc);
452                         return fdc_err(fdc, "Enable FIFO failed\n");
453                 }
454                 fdc->flags |= FDC_HAS_FIFO;
455                 return 0;
456         }
457         if (fd_cmd(fdc, 4,
458                    I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
459                 return fdc_err(fdc, "Re-enable FIFO failed\n");
460         return 0;
461 }
462
463 static int
464 fd_sense_drive_status(fdc_p fdc, int *st3p)
465 {
466         int st3;
467
468         if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
469         {
470                 return fdc_err(fdc, "Sense Drive Status failed\n");
471         }
472         if (st3p)
473                 *st3p = st3;
474
475         return 0;
476 }
477
478 static int
479 fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
480 {
481         int cyl, st0, ret;
482
483         ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
484         if (ret) {
485                 (void)fdc_err(fdc,
486                               "sense intr err reading stat reg 0\n");
487                 return ret;
488         }
489
490         if (st0p)
491                 *st0p = st0;
492
493         if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
494                 /*
495                  * There doesn't seem to have been an interrupt.
496                  */
497                 return FD_NOT_VALID;
498         }
499
500         if (fd_in(fdc, &cyl) < 0) {
501                 return fdc_err(fdc, "can't get cyl num\n");
502         }
503
504         if (cylp)
505                 *cylp = cyl;
506
507         return 0;
508 }
509
510
511 static int
512 fd_read_status(fdc_p fdc, int fdsu)
513 {
514         int i, ret;
515
516         for (i = 0; i < 7; i++) {
517                 /*
518                  * XXX types are poorly chosen.  Only bytes can by read
519                  * from the hardware, but fdc->status[] wants u_ints and
520                  * fd_in() gives ints.
521                  */
522                 int status;
523
524                 ret = fd_in(fdc, &status);
525                 fdc->status[i] = status;
526                 if (ret != 0)
527                         break;
528         }
529
530         if (ret == 0)
531                 fdc->flags |= FDC_STAT_VALID;
532         else
533                 fdc->flags &= ~FDC_STAT_VALID;
534
535         return ret;
536 }
537
538 /****************************************************************************/
539 /*                      autoconfiguration stuff                             */
540 /****************************************************************************/
541
542 static int
543 fdc_alloc_resources(struct fdc_data *fdc)
544 {
545         device_t dev;
546         int ispnp, ispcmcia;
547
548         dev = fdc->fdc_dev;
549         ispnp = (fdc->flags & FDC_ISPNP) != 0;
550         ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
551         fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
552         fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
553
554         /*
555          * On standard ISA, we don't just use an 8 port range
556          * (e.g. 0x3f0-0x3f7) since that covers an IDE control
557          * register at 0x3f6.
558          *
559          * Isn't PC hardware wonderful.
560          *
561          * The Y-E Data PCMCIA FDC doesn't have this problem, it
562          * uses the register with offset 6 for pseudo-DMA, and the
563          * one with offset 7 as control register.
564          */
565         fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
566                                              &fdc->rid_ioport, 0ul, ~0ul, 
567                                              ispcmcia ? 8 : (ispnp ? 1 : 6),
568                                              RF_ACTIVE);
569         if (fdc->res_ioport == 0) {
570                 device_printf(dev, "cannot reserve I/O port range\n");
571                 return ENXIO;
572         }
573         fdc->portt = rman_get_bustag(fdc->res_ioport);
574         fdc->porth = rman_get_bushandle(fdc->res_ioport);
575
576         if (!ispcmcia) {
577                 /*
578                  * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
579                  * and some at 0x3f0-0x3f5,0x3f7. We detect the former
580                  * by checking the size and adjust the port address
581                  * accordingly.
582                  */
583                 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
584                         fdc->port_off = -2;
585
586                 /*
587                  * Register the control port range as rid 1 if it
588                  * isn't there already. Most PnP BIOSen will have
589                  * already done this but non-PnP configurations don't.
590                  *
591                  * And some (!!) report 0x3f2-0x3f5 and completely
592                  * leave out the control register!  It seems that some
593                  * non-antique controller chips have a different
594                  * method of programming the transfer speed which
595                  * doesn't require the control register, but it's
596                  * mighty bogus as the chip still responds to the
597                  * address for the control register.
598                  */
599                 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
600                         u_long ctlstart;
601
602                         /* Find the control port, usually 0x3f7 */
603                         ctlstart = rman_get_start(fdc->res_ioport) +
604                                 fdc->port_off + 7;
605
606                         bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
607                 }
608
609                 /*
610                  * Now (finally!) allocate the control port.
611                  */
612                 fdc->rid_ctl = 1;
613                 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
614                                                   &fdc->rid_ctl,
615                                                   0ul, ~0ul, 1, RF_ACTIVE);
616                 if (fdc->res_ctl == 0) {
617                         device_printf(dev,
618                                       "cannot reserve control I/O port range\n");
619                         return ENXIO;
620                 }
621                 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
622                 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
623         }
624
625         fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
626                                           &fdc->rid_irq, 0ul, ~0ul, 1, 
627                                           RF_ACTIVE);
628         if (fdc->res_irq == 0) {
629                 device_printf(dev, "cannot reserve interrupt line\n");
630                 return ENXIO;
631         }
632
633         if ((fdc->flags & FDC_NODMA) == 0) {
634                 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
635                                                   &fdc->rid_drq, 0ul, ~0ul, 1, 
636                                                   RF_ACTIVE);
637                 if (fdc->res_drq == 0) {
638                         device_printf(dev, "cannot reserve DMA request line\n");
639                         return ENXIO;
640                 }
641                 fdc->dmachan = fdc->res_drq->r_start;
642         }
643
644         return 0;
645 }
646
647 static void
648 fdc_release_resources(struct fdc_data *fdc)
649 {
650         device_t dev;
651
652         dev = fdc->fdc_dev;
653         if (fdc->res_irq != 0) {
654                 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
655                                         fdc->res_irq);
656                 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
657                                      fdc->res_irq);
658         }
659         if (fdc->res_ctl != 0) {
660                 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
661                                         fdc->res_ctl);
662                 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
663                                      fdc->res_ctl);
664         }
665         if (fdc->res_ioport != 0) {
666                 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
667                                         fdc->res_ioport);
668                 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
669                                      fdc->res_ioport);
670         }
671         if (fdc->res_drq != 0) {
672                 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
673                                         fdc->res_drq);
674                 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
675                                      fdc->res_drq);
676         }
677 }
678
679 /****************************************************************************/
680 /*                      autoconfiguration stuff                             */
681 /****************************************************************************/
682
683 static struct isa_pnp_id fdc_ids[] = {
684         {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
685         {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
686         {0}
687 };
688
689 static int
690 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
691 {
692         struct fdc_ivars *ivars = device_get_ivars(child);
693
694         switch (which) {
695         case FDC_IVAR_FDUNIT:
696                 *result = ivars->fdunit;
697                 break;
698         default:
699                 return ENOENT;
700         }
701         return 0;
702 }
703
704 /*
705  * fdc controller section.
706  */
707 static int
708 fdc_probe(device_t dev)
709 {
710         int     error, ic_type;
711         struct  fdc_data *fdc;
712
713         fdc = device_get_softc(dev);
714         bzero(fdc, sizeof *fdc);
715         fdc->fdc_dev = dev;
716         fdc->fdctl_wr = fdctl_wr_isa;
717
718         /* Check pnp ids */
719         error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
720         if (error == ENXIO)
721                 return ENXIO;
722         if (error == 0)
723                 fdc->flags |= FDC_ISPNP;
724
725         /* Attempt to allocate our resources for the duration of the probe */
726         error = fdc_alloc_resources(fdc);
727         if (error)
728                 goto out;
729
730         /* First - lets reset the floppy controller */
731         fdout_wr(fdc, 0);
732         DELAY(100);
733         fdout_wr(fdc, FDO_FRST);
734
735         /* see if it can handle a command */
736         if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 
737                    NE7_SPEC_2(2, 0), 0)) {
738                 error = ENXIO;
739                 goto out;
740         }
741
742         if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
743                 ic_type = (u_char)ic_type;
744                 switch (ic_type) {
745                 case 0x80:
746                         device_set_desc(dev, "NEC 765 or clone");
747                         fdc->fdct = FDC_NE765;
748                         break;
749                 case 0x81:
750                         device_set_desc(dev, "Intel 82077 or clone");
751                         fdc->fdct = FDC_I82077;
752                         break;
753                 case 0x90:
754                         device_set_desc(dev, "NEC 72065B or clone");
755                         fdc->fdct = FDC_NE72065;
756                         break;
757                 default:
758                         device_set_desc(dev, "generic floppy controller");
759                         fdc->fdct = FDC_UNKNOWN;
760                         break;
761                 }
762         }
763
764 out:
765         fdc_release_resources(fdc);
766         return (error);
767 }
768
769 #if NCARD > 0
770
771 static int
772 fdc_pccard_probe(device_t dev)
773 {
774         int     error;
775         struct  fdc_data *fdc;
776
777         fdc = device_get_softc(dev);
778         bzero(fdc, sizeof *fdc);
779         fdc->fdc_dev = dev;
780         fdc->fdctl_wr = fdctl_wr_pcmcia;
781
782         fdc->flags |= FDC_ISPCMCIA | FDC_NODMA;
783
784         /* Attempt to allocate our resources for the duration of the probe */
785         error = fdc_alloc_resources(fdc);
786         if (error)
787                 goto out;
788
789         /* First - lets reset the floppy controller */
790         fdout_wr(fdc, 0);
791         DELAY(100);
792         fdout_wr(fdc, FDO_FRST);
793
794         /* see if it can handle a command */
795         if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 
796                    NE7_SPEC_2(2, 0), 0)) {
797                 error = ENXIO;
798                 goto out;
799         }
800
801         device_set_desc(dev, "Y-E Data PCMCIA floppy");
802         fdc->fdct = FDC_NE765;
803
804 out:
805         fdc_release_resources(fdc);
806         return (error);
807 }
808
809 static int
810 fdc_pccard_detach(device_t dev)
811 {
812         struct  fdc_data *fdc;
813         int     error;
814
815         fdc = device_get_softc(dev);
816
817         /* have our children detached first */
818         if ((error = bus_generic_detach(dev)))
819                 return (error);
820
821         if ((fdc->flags & FDC_ATTACHED) == 0) {
822                 device_printf(dev, "already unloaded\n");
823                 return (0);
824         }
825         fdc->flags &= ~FDC_ATTACHED;
826
827         BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq,
828                           fdc->fdc_intr);
829         fdc_release_resources(fdc);
830         device_printf(dev, "unload\n");
831         return (0);
832 }
833
834 #endif /* NCARD > 0 */
835
836 /*
837  * Add a child device to the fdc controller.  It will then be probed etc.
838  */
839 static void
840 fdc_add_child(device_t dev, const char *name, int unit)
841 {
842         int     disabled;
843         struct fdc_ivars *ivar;
844         device_t child;
845
846         ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT);
847         if (ivar == NULL)
848                 return;
849         bzero(ivar, sizeof *ivar);
850         if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
851                 ivar->fdunit = 0;
852         child = device_add_child(dev, name, unit);
853         if (child == NULL)
854                 return;
855         device_set_ivars(child, ivar);
856         if (resource_int_value(name, unit, "disabled", &disabled) == 0
857             && disabled != 0)
858                 device_disable(child);
859 }
860
861 static int
862 fdc_attach(device_t dev)
863 {
864         struct  fdc_data *fdc;
865         int     i, error;
866
867         fdc = device_get_softc(dev);
868         error = fdc_alloc_resources(fdc);
869         if (error) {
870                 device_printf(dev, "cannot re-aquire resources\n");
871                 return error;
872         }
873         error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
874                                INTR_TYPE_BIO, fdc_intr, fdc, &fdc->fdc_intr);
875         if (error) {
876                 device_printf(dev, "cannot setup interrupt\n");
877                 return error;
878         }
879         fdc->fdcu = device_get_unit(dev);
880         fdc->flags |= FDC_ATTACHED;
881
882         if ((fdc->flags & FDC_NODMA) == 0) {
883                 /* Acquire the DMA channel forever, The driver will do the rest */
884                                 /* XXX should integrate with rman */
885                 isa_dma_acquire(fdc->dmachan);
886                 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
887         }
888         fdc->state = DEVIDLE;
889
890         /* reset controller, turn motor off, clear fdout mirror reg */
891         fdout_wr(fdc, ((fdc->fdout = 0)));
892         bufq_init(&fdc->head);
893
894         /*
895          * Probe and attach any children.  We should probably detect
896          * devices from the BIOS unless overridden.
897          */
898         for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
899              i != -1;
900              i = resource_query_string(i, "at", device_get_nameunit(dev)))
901                 fdc_add_child(dev, resource_query_name(i),
902                                resource_query_unit(i));
903
904         return (bus_generic_attach(dev));
905 }
906
907 static int
908 fdc_print_child(device_t me, device_t child)
909 {
910         int retval = 0;
911
912         retval += bus_print_child_header(me, child);
913         retval += printf(" on %s drive %d\n", device_get_nameunit(me),
914                fdc_get_fdunit(child));
915         
916         return (retval);
917 }
918
919 static device_method_t fdc_methods[] = {
920         /* Device interface */
921         DEVMETHOD(device_probe,         fdc_probe),
922         DEVMETHOD(device_attach,        fdc_attach),
923         DEVMETHOD(device_detach,        bus_generic_detach),
924         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
925         DEVMETHOD(device_suspend,       bus_generic_suspend),
926         DEVMETHOD(device_resume,        bus_generic_resume),
927
928         /* Bus interface */
929         DEVMETHOD(bus_print_child,      fdc_print_child),
930         DEVMETHOD(bus_read_ivar,        fdc_read_ivar),
931         /* Our children never use any other bus interface methods. */
932
933         { 0, 0 }
934 };
935
936 static driver_t fdc_driver = {
937         "fdc",
938         fdc_methods,
939         sizeof(struct fdc_data)
940 };
941
942 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
943
944 #if NCARD > 0
945
946 static device_method_t fdc_pccard_methods[] = {
947         /* Device interface */
948         DEVMETHOD(device_probe,         fdc_pccard_probe),
949         DEVMETHOD(device_attach,        fdc_attach),
950         DEVMETHOD(device_detach,        fdc_pccard_detach),
951         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
952         DEVMETHOD(device_suspend,       bus_generic_suspend),
953         DEVMETHOD(device_resume,        bus_generic_resume),
954
955         /* Bus interface */
956         DEVMETHOD(bus_print_child,      fdc_print_child),
957         DEVMETHOD(bus_read_ivar,        fdc_read_ivar),
958         /* Our children never use any other bus interface methods. */
959
960         { 0, 0 }
961 };
962
963 static driver_t fdc_pccard_driver = {
964         "fdc",
965         fdc_pccard_methods,
966         sizeof(struct fdc_data)
967 };
968
969 DRIVER_MODULE(fdc, pccard, fdc_pccard_driver, fdc_devclass, 0, 0);
970
971 #endif /* NCARD > 0 */
972
973 /******************************************************************/
974 /*
975  * devices attached to the controller section.  
976  */
977 static int
978 fd_probe(device_t dev)
979 {
980         int     i;
981         u_int   fdt, st0, st3;
982         struct  fd_data *fd;
983         struct  fdc_data *fdc;
984         fdsu_t  fdsu;
985         static int fd_fifo = 0;
986
987         fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
988         fd = device_get_softc(dev);
989         fdc = device_get_softc(device_get_parent(dev));
990
991         bzero(fd, sizeof *fd);
992         fd->dev = dev;
993         fd->fdc = fdc;
994         fd->fdsu = fdsu;
995         fd->fdu = device_get_unit(dev);
996
997 #ifdef __i386__
998         /* look up what bios thinks we have */
999         switch (fd->fdu) {
1000         case 0:
1001                 if ((fdc->flags & FDC_ISPCMCIA))
1002                         fdt = RTCFDT_144M;
1003                 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
1004                         fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
1005                 else
1006                         fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
1007                 break;
1008         case 1:
1009                 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
1010                 break;
1011         default:
1012                 fdt = RTCFDT_NONE;
1013                 break;
1014         }
1015 #else
1016         fdt = RTCFDT_144M;      /* XXX probably */
1017 #endif
1018
1019         /* is there a unit? */
1020         if (fdt == RTCFDT_NONE)
1021                 return (ENXIO);
1022
1023         /* select it */
1024         set_motor(fdc, fdsu, TURNON);
1025         DELAY(1000000); /* 1 sec */
1026
1027         /* XXX This doesn't work before the first set_motor() */
1028         if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
1029             && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
1030             && enable_fifo(fdc) == 0) {
1031                 device_printf(device_get_parent(dev),
1032                     "FIFO enabled, %d bytes threshold\n", fifo_threshold);
1033         }
1034         fd_fifo = 1;
1035
1036         if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
1037             && (st3 & NE7_ST3_T0)) {
1038                 /* if at track 0, first seek inwards */
1039                 /* seek some steps: */
1040                 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
1041                 DELAY(300000); /* ...wait a moment... */
1042                 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
1043         }
1044
1045         /* If we're at track 0 first seek inwards. */
1046         if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
1047                 /* Seek some steps... */
1048                 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
1049                         /* ...wait a moment... */
1050                         DELAY(300000);
1051                         /* make ctrlr happy: */
1052                         fd_sense_int(fdc, 0, 0);
1053                 }
1054         }
1055
1056         for (i = 0; i < 2; i++) {
1057                 /*
1058                  * we must recalibrate twice, just in case the
1059                  * heads have been beyond cylinder 76, since most
1060                  * FDCs still barf when attempting to recalibrate
1061                  * more than 77 steps
1062                  */
1063                 /* go back to 0: */
1064                 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
1065                         /* a second being enough for full stroke seek*/
1066                         DELAY(i == 0 ? 1000000 : 300000);
1067
1068                         /* anything responding? */
1069                         if (fd_sense_int(fdc, &st0, 0) == 0 &&
1070                             (st0 & NE7_ST0_EC) == 0)
1071                                 break; /* already probed succesfully */
1072                 }
1073         }
1074
1075         set_motor(fdc, fdsu, TURNOFF);
1076
1077         if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
1078                 return (ENXIO);
1079
1080         fd->track = FD_NO_TRACK;
1081         fd->fdc = fdc;
1082         fd->fdsu = fdsu;
1083         fd->options = 0;
1084         callout_handle_init(&fd->toffhandle);
1085         callout_handle_init(&fd->tohandle);
1086
1087         switch (fdt) {
1088         case RTCFDT_12M:
1089                 device_set_desc(dev, "1200-KB 5.25\" drive");
1090                 fd->type = FD_1200;
1091                 break;
1092         case RTCFDT_144M | RTCFDT_144M_PRETENDED:
1093                 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
1094                 fdt = RTCFDT_144M;
1095                 fd->type = FD_1440;
1096         case RTCFDT_144M:
1097                 device_set_desc(dev, "1440-KB 3.5\" drive");
1098                 fd->type = FD_1440;
1099                 break;
1100         case RTCFDT_288M:
1101         case RTCFDT_288M_1:
1102                 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
1103                 fd->type = FD_1440;
1104                 break;
1105         case RTCFDT_360K:
1106                 device_set_desc(dev, "360-KB 5.25\" drive");
1107                 fd->type = FD_360;
1108                 break;
1109         case RTCFDT_720K:
1110                 printf("720-KB 3.5\" drive");
1111                 fd->type = FD_720;
1112                 break;
1113         default:
1114                 return (ENXIO);
1115         }
1116         return (0);
1117 }
1118
1119 static int
1120 fd_attach(device_t dev)
1121 {
1122         struct  fd_data *fd;
1123 #if 0
1124         int     i;
1125         int     mynor;
1126         int     typemynor;
1127         int     typesize;
1128 #endif
1129         static int cdevsw_add_done = 0;
1130
1131         fd = device_get_softc(dev);
1132
1133         if (!cdevsw_add_done) {
1134                 cdevsw_add(&fd_cdevsw); /* XXX */
1135                 cdevsw_add_done++;
1136         }
1137         make_dev(&fd_cdevsw, (fd->fdu << 6),
1138                 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu);
1139
1140 #if 0
1141         /* Other make_dev() go here. */
1142 #endif
1143
1144         /*
1145          * Export the drive to the devstat interface.
1146          */
1147         devstat_add_entry(&fd->device_stats, device_get_name(dev), 
1148                           device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1149                           DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1150                           DEVSTAT_PRIORITY_FD);
1151         return (0);
1152 }
1153
1154 static int
1155 fd_detach(device_t dev)
1156 {
1157         struct  fd_data *fd;
1158
1159         fd = device_get_softc(dev);
1160         untimeout(fd_turnoff, fd, fd->toffhandle);
1161
1162         return (0);
1163 }
1164
1165 static device_method_t fd_methods[] = {
1166         /* Device interface */
1167         DEVMETHOD(device_probe,         fd_probe),
1168         DEVMETHOD(device_attach,        fd_attach),
1169         DEVMETHOD(device_detach,        fd_detach),
1170         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
1171         DEVMETHOD(device_suspend,       bus_generic_suspend), /* XXX */
1172         DEVMETHOD(device_resume,        bus_generic_resume), /* XXX */
1173
1174         { 0, 0 }
1175 };
1176
1177 static driver_t fd_driver = {
1178         "fd",
1179         fd_methods,
1180         sizeof(struct fd_data)
1181 };
1182
1183 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1184
1185 /****************************************************************************/
1186 /*                            motor control stuff                           */
1187 /*              remember to not deselect the drive we're working on         */
1188 /****************************************************************************/
1189 static void
1190 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1191 {
1192         int fdout = fdc->fdout;
1193         int needspecify = 0;
1194
1195         if(turnon) {
1196                 fdout &= ~FDO_FDSEL;
1197                 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1198         } else
1199                 fdout &= ~(FDO_MOEN0 << fdsu);
1200
1201         if(!turnon
1202            && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1203                 /* gonna turn off the last drive, put FDC to bed */
1204                 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1205         else {
1206                 /* make sure controller is selected and specified */
1207                 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1208                         needspecify = 1;
1209                 fdout |= (FDO_FRST|FDO_FDMAEN);
1210         }
1211
1212         fdout_wr(fdc, fdout);
1213         fdc->fdout = fdout;
1214         TRACE1("[0x%x->FDOUT]", fdout);
1215
1216         if (needspecify) {
1217                 /*
1218                  * XXX
1219                  * special case: since we have just woken up the FDC
1220                  * from its sleep, we silently assume the command will
1221                  * be accepted, and do not test for a timeout
1222                  */
1223                 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1224                              NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1225                              0);
1226                 if (fdc->flags & FDC_HAS_FIFO)
1227                         (void) enable_fifo(fdc);
1228         }
1229 }
1230
1231 static void
1232 fd_turnoff(void *xfd)
1233 {
1234         int     s;
1235         fd_p fd = xfd;
1236
1237         TRACE1("[fd%d: turnoff]", fd->fdu);
1238
1239         s = splbio();
1240         /*
1241          * Don't turn off the motor yet if the drive is active.
1242          *
1243          * If we got here, this could only mean we missed an interrupt.
1244          * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1245          * after a controller reset.  Just schedule a pseudo-interrupt
1246          * so the state machine gets re-entered.
1247          */
1248         if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1249                 fdc_intr(fd->fdc);
1250                 splx(s);
1251                 return;
1252         }
1253
1254         fd->flags &= ~FD_MOTOR;
1255         set_motor(fd->fdc, fd->fdsu, TURNOFF);
1256         splx(s);
1257 }
1258
1259 static void
1260 fd_motor_on(void *xfd)
1261 {
1262         int     s;
1263         fd_p fd = xfd;
1264
1265         s = splbio();
1266         fd->flags &= ~FD_MOTOR_WAIT;
1267         if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1268         {
1269                 fdc_intr(fd->fdc);
1270         }
1271         splx(s);
1272 }
1273
1274 static void
1275 fd_turnon(fd_p fd)
1276 {
1277         if(!(fd->flags & FD_MOTOR))
1278         {
1279                 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1280                 set_motor(fd->fdc, fd->fdsu, TURNON);
1281                 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */
1282         }
1283 }
1284
1285 static void
1286 fdc_reset(fdc_p fdc)
1287 {
1288         /* Try a reset, keep motor on */
1289         fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1290         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1291         DELAY(100);
1292         /* enable FDC, but defer interrupts a moment */
1293         fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1294         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1295         DELAY(100);
1296         fdout_wr(fdc, fdc->fdout);
1297         TRACE1("[0x%x->FDOUT]", fdc->fdout);
1298
1299         /* XXX after a reset, silently believe the FDC will accept commands */
1300         (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1301                      NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1302                      0);
1303         if (fdc->flags & FDC_HAS_FIFO)
1304                 (void) enable_fifo(fdc);
1305 }
1306
1307 /****************************************************************************/
1308 /*                             fdc in/out                                   */
1309 /****************************************************************************/
1310 /*
1311  * FDC IO functions, take care of the main status register, timeout
1312  * in case the desired status bits are never set.
1313  *
1314  * These PIO loops initially start out with short delays between
1315  * each iteration in the expectation that the required condition
1316  * is usually met quickly, so it can be handled immediately.  After
1317  * about 1 ms, stepping is increased to achieve a better timing
1318  * accuracy in the calls to DELAY().
1319  */
1320 static int
1321 fd_in(struct fdc_data *fdc, int *ptr)
1322 {
1323         int i, j, step;
1324
1325         for (j = 0, step = 1;
1326             (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1327             j < FDSTS_TIMEOUT;
1328             j += step) {
1329                 if (i == NE7_RQM)
1330                         return (fdc_err(fdc, "ready for output in input\n"));
1331                 if (j == 1000)
1332                         step = 1000;
1333                 DELAY(step);
1334         }
1335         if (j >= FDSTS_TIMEOUT)
1336                 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1337 #ifdef  FDC_DEBUG
1338         i = fddata_rd(fdc);
1339         TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1340         *ptr = i;
1341         return (0);
1342 #else   /* !FDC_DEBUG */
1343         i = fddata_rd(fdc);
1344         if (ptr)
1345                 *ptr = i;
1346         return (0);
1347 #endif  /* FDC_DEBUG */
1348 }
1349
1350 static int
1351 out_fdc(struct fdc_data *fdc, int x)
1352 {
1353         int i, j, step;
1354
1355         for (j = 0, step = 1;
1356             (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1357             j < FDSTS_TIMEOUT;
1358             j += step) {
1359                 if (i == (NE7_DIO|NE7_RQM))
1360                         return (fdc_err(fdc, "ready for input in output\n"));
1361                 if (j == 1000)
1362                         step = 1000;
1363                 DELAY(step);
1364         }
1365         if (j >= FDSTS_TIMEOUT)
1366                 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1367
1368         /* Send the command and return */
1369         fddata_wr(fdc, x);
1370         TRACE1("[0x%x->FDDATA]", x);
1371         return (0);
1372 }
1373
1374 /****************************************************************************/
1375 /*                           fdopen/fdclose                                 */
1376 /****************************************************************************/
1377 int
1378 Fdopen(dev_t dev, int flags, int mode, struct thread *td)
1379 {
1380         fdu_t fdu = FDUNIT(minor(dev));
1381         int type = FDTYPE(minor(dev));
1382         fd_p    fd;
1383         fdc_p   fdc;
1384
1385         /* check bounds */
1386         if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1387                 return (ENXIO);
1388         fdc = fd->fdc;
1389         if ((fdc == NULL) || (fd->type == NO_TYPE))
1390                 return (ENXIO);
1391         if (type > NUMDENS)
1392                 return (ENXIO);
1393         if (type == 0)
1394                 type = fd->type;
1395         else {
1396                 /*
1397                  * For each type of basic drive, make sure we are trying
1398                  * to open a type it can do,
1399                  */
1400                 if (type != fd->type) {
1401                         switch (fd->type) {
1402                         case FD_360:
1403                                 return (ENXIO);
1404                         case FD_720:
1405                                 if (   type != FD_820
1406                                     && type != FD_800
1407                                     && type != FD_640
1408                                    )
1409                                         return (ENXIO);
1410                                 break;
1411                         case FD_1200:
1412                                 switch (type) {
1413                                 case FD_1480:
1414                                         type = FD_1480in5_25;
1415                                         break;
1416                                 case FD_1440:
1417                                         type = FD_1440in5_25;
1418                                         break;
1419                                 case FD_1232:
1420                                         break;
1421                                 case FD_820:
1422                                         type = FD_820in5_25;
1423                                         break;
1424                                 case FD_800:
1425                                         type = FD_800in5_25;
1426                                         break;
1427                                 case FD_720:
1428                                         type = FD_720in5_25;
1429                                         break;
1430                                 case FD_640:
1431                                         type = FD_640in5_25;
1432                                         break;
1433                                 case FD_360:
1434                                         type = FD_360in5_25;
1435                                         break;
1436                                 default:
1437                                         return(ENXIO);
1438                                 }
1439                                 break;
1440                         case FD_1440:
1441                                 if (   type != FD_1720
1442                                     && type != FD_1480
1443                                     && type != FD_1200
1444                                     && type != FD_820
1445                                     && type != FD_800
1446                                     && type != FD_720
1447                                     && type != FD_640
1448                                     )
1449                                         return(ENXIO);
1450                                 break;
1451                         }
1452                 }
1453         }
1454         fd->ft = fd_types + type - 1;
1455         fd->flags |= FD_OPEN;
1456         /*
1457          * Clearing the DMA overrun counter at open time is a bit messy.
1458          * Since we're only managing one counter per controller, opening
1459          * the second drive could mess it up.  Anyway, if the DMA overrun
1460          * condition is really persistent, it will eventually time out
1461          * still.  OTOH, clearing it here will ensure we'll at least start
1462          * trying again after a previous (maybe even long ago) failure.
1463          * Also, this is merely a stop-gap measure only that should not
1464          * happen during normal operation, so we can tolerate it to be a
1465          * bit sloppy about this.
1466          */
1467         fdc->dma_overruns = 0;
1468
1469         return 0;
1470 }
1471
1472 int
1473 fdclose(dev_t dev, int flags, int mode, struct thread *td)
1474 {
1475         fdu_t fdu = FDUNIT(minor(dev));
1476         struct fd_data *fd;
1477
1478         fd = devclass_get_softc(fd_devclass, fdu);
1479         fd->flags &= ~FD_OPEN;
1480         fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1481
1482         return (0);
1483 }
1484
1485 /****************************************************************************/
1486 /*                               fdstrategy                                 */
1487 /****************************************************************************/
1488 void
1489 fdstrategy(struct buf *bp)
1490 {
1491         unsigned nblocks, blknum, cando;
1492         int     s;
1493         fdu_t   fdu;
1494         fdc_p   fdc;
1495         fd_p    fd;
1496         size_t  fdblk;
1497
1498         fdu = FDUNIT(minor(bp->b_dev));
1499         fd = devclass_get_softc(fd_devclass, fdu);
1500         if (fd == 0)
1501                 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1502                       (u_long)major(bp->b_dev), (u_long)minor(bp->b_dev));
1503         fdc = fd->fdc;
1504         if (fd->type == NO_TYPE) {
1505                 bp->b_error = ENXIO;
1506                 bp->b_flags |= B_ERROR;
1507                 goto bad;
1508         };
1509
1510         fdblk = 128 << (fd->ft->secsize);
1511         if (!(bp->b_flags & B_FORMAT)) {
1512                 if (bp->b_blkno < 0) {
1513                         printf(
1514                 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
1515                                fdu, (u_long)bp->b_blkno, bp->b_bcount);
1516                         bp->b_error = EINVAL;
1517                         bp->b_flags |= B_ERROR;
1518                         goto bad;
1519                 }
1520                 if ((bp->b_bcount % fdblk) != 0) {
1521                         bp->b_error = EINVAL;
1522                         bp->b_flags |= B_ERROR;
1523                         goto bad;
1524                 }
1525         }
1526
1527         /*
1528          * Set up block calculations.
1529          */
1530         if (bp->b_blkno > 20000000) {
1531                 /*
1532                  * Reject unreasonably high block number, prevent the
1533                  * multiplication below from overflowing.
1534                  */
1535                 bp->b_error = EINVAL;
1536                 bp->b_flags |= B_ERROR;
1537                 goto bad;
1538         }
1539         blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk;
1540         nblocks = fd->ft->size;
1541         bp->b_resid = 0;
1542         if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1543                 if (blknum <= nblocks) {
1544                         cando = (nblocks - blknum) * fdblk;
1545                         bp->b_resid = bp->b_bcount - cando;
1546                         if (cando == 0)
1547                                 goto bad;       /* not actually bad but EOF */
1548                 } else {
1549                         bp->b_error = EINVAL;
1550                         bp->b_flags |= B_ERROR;
1551                         goto bad;
1552                 }
1553         }
1554         bp->b_pblkno = bp->b_blkno;
1555         s = splbio();
1556         bufqdisksort(&fdc->head, bp);
1557         untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */
1558
1559         /* Tell devstat we are starting on the transaction */
1560         devstat_start_transaction(&fd->device_stats);
1561         device_busy(fd->dev);
1562
1563         fdstart(fdc);
1564         splx(s);
1565         return;
1566
1567 bad:
1568         biodone(bp);
1569 }
1570
1571 /***************************************************************\
1572 *                               fdstart                         *
1573 * We have just queued something.. if the controller is not busy *
1574 * then simulate the case where it has just finished a command   *
1575 * So that it (the interrupt routine) looks on the queue for more*
1576 * work to do and picks up what we just added.                   *
1577 * If the controller is already busy, we need do nothing, as it  *
1578 * will pick up our work when the present work completes         *
1579 \***************************************************************/
1580 static void
1581 fdstart(struct fdc_data *fdc)
1582 {
1583         int s;
1584
1585         s = splbio();
1586         if(fdc->state == DEVIDLE)
1587         {
1588                 fdc_intr(fdc);
1589         }
1590         splx(s);
1591 }
1592
1593 static void
1594 fd_iotimeout(void *xfdc)
1595 {
1596         fdc_p fdc;
1597         int s;
1598
1599         fdc = xfdc;
1600         TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1601
1602         /*
1603          * Due to IBM's brain-dead design, the FDC has a faked ready
1604          * signal, hardwired to ready == true. Thus, any command
1605          * issued if there's no diskette in the drive will _never_
1606          * complete, and must be aborted by resetting the FDC.
1607          * Many thanks, Big Blue!
1608          * The FDC must not be reset directly, since that would
1609          * interfere with the state machine.  Instead, pretend that
1610          * the command completed but was invalid.  The state machine
1611          * will reset the FDC and retry once.
1612          */
1613         s = splbio();
1614         fdc->status[0] = NE7_ST0_IC_IV;
1615         fdc->flags &= ~FDC_STAT_VALID;
1616         fdc->state = IOTIMEDOUT;
1617         fdc_intr(fdc);
1618         splx(s);
1619 }
1620
1621 /* just ensure it has the right spl */
1622 static void
1623 fd_pseudointr(void *xfdc)
1624 {
1625         int     s;
1626
1627         s = splbio();
1628         fdc_intr(xfdc);
1629         splx(s);
1630 }
1631
1632 /***********************************************************************\
1633 *                                 fdintr                                *
1634 * keep calling the state machine until it returns a 0                   *
1635 * ALWAYS called at SPLBIO                                               *
1636 \***********************************************************************/
1637 static void
1638 fdc_intr(void *xfdc)
1639 {
1640         fdc_p fdc = xfdc;
1641         while(fdstate(fdc))
1642                 ;
1643 }
1644
1645 /*
1646  * magic pseudo-DMA initialization for YE FDC. Sets count and
1647  * direction
1648  */
1649 #define SET_BCDR(fdc,wr,cnt,port) \
1650         bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port,  \
1651             ((cnt)-1) & 0xff);                                           \
1652         bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1653             ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1654
1655 /*
1656  * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1657  */
1658 static int fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count)
1659 {
1660         u_char *cptr = (u_char *)addr;
1661
1662         if (flags & B_READ) {
1663                 if (fdc->state != PIOREAD) {
1664                         fdc->state = PIOREAD;
1665                         return(0);
1666                 };
1667                 SET_BCDR(fdc, 0, count, 0);
1668                 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1669                     FDC_YE_DATAPORT, cptr, count);
1670         } else {
1671                 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1672                     FDC_YE_DATAPORT, cptr, count);
1673                 SET_BCDR(fdc, 0, count, 0);
1674         };
1675         return(1);
1676 }
1677
1678 /***********************************************************************\
1679 * The controller state machine.                                         *
1680 * if it returns a non zero value, it should be called again immediatly  *
1681 \***********************************************************************/
1682 static int
1683 fdstate(fdc_p fdc)
1684 {
1685         int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1686         unsigned blknum = 0, b_cylinder = 0;
1687         fdu_t fdu = fdc->fdu;
1688         fd_p fd;
1689         register struct buf *bp;
1690         struct fd_formb *finfo = NULL;
1691         size_t fdblk;
1692
1693         bp = fdc->bp;
1694         if (bp == NULL) {
1695                 bp = bufq_first(&fdc->head);
1696                 if (bp != NULL) {
1697                         bufq_remove(&fdc->head, bp);
1698                         fdc->bp = bp;
1699                 }
1700         }
1701         if (bp == NULL) {
1702                 /***********************************************\
1703                 * nothing left for this controller to do        *
1704                 * Force into the IDLE state,                    *
1705                 \***********************************************/
1706                 fdc->state = DEVIDLE;
1707                 if (fdc->fd) {
1708                         device_printf(fdc->fdc_dev,
1709                             "unexpected valid fd pointer\n");
1710                         fdc->fd = (fd_p) 0;
1711                         fdc->fdu = -1;
1712                 }
1713                 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1714                 return (0);
1715         }
1716         fdu = FDUNIT(minor(bp->b_dev));
1717         fd = devclass_get_softc(fd_devclass, fdu);
1718         fdblk = 128 << fd->ft->secsize;
1719         if (fdc->fd && (fd != fdc->fd))
1720                 device_printf(fd->dev, "confused fd pointers\n");
1721         read = bp->b_flags & B_READ;
1722         format = bp->b_flags & B_FORMAT;
1723         if (format) {
1724                 finfo = (struct fd_formb *)bp->b_data;
1725                 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1726                         - (char *)finfo;
1727         }
1728         if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1729                 blknum = (unsigned) bp->b_pblkno * DEV_BSIZE/fdblk +
1730                         fd->skip/fdblk;
1731                 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1732         }
1733         TRACE1("fd%d", fdu);
1734         TRACE1("[%s]", fdstates[fdc->state]);
1735         TRACE1("(0x%x)", fd->flags);
1736         untimeout(fd_turnoff, fd, fd->toffhandle);
1737         fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz);
1738         switch (fdc->state)
1739         {
1740         case DEVIDLE:
1741         case FINDWORK:  /* we have found new work */
1742                 fdc->retry = 0;
1743                 fd->skip = 0;
1744                 fdc->fd = fd;
1745                 fdc->fdu = fdu;
1746                 fdc->fdctl_wr(fdc, fd->ft->trans);
1747                 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1748                 /*******************************************************\
1749                 * If the next drive has a motor startup pending, then   *
1750                 * it will start up in its own good time         *
1751                 \*******************************************************/
1752                 if(fd->flags & FD_MOTOR_WAIT) {
1753                         fdc->state = MOTORWAIT;
1754                         return (0); /* come back later */
1755                 }
1756                 /*******************************************************\
1757                 * Maybe if it's not starting, it SHOULD be starting     *
1758                 \*******************************************************/
1759                 if (!(fd->flags & FD_MOTOR))
1760                 {
1761                         fdc->state = MOTORWAIT;
1762                         fd_turnon(fd);
1763                         return (0);
1764                 }
1765                 else    /* at least make sure we are selected */
1766                 {
1767                         set_motor(fdc, fd->fdsu, TURNON);
1768                 }
1769                 if (fdc->flags & FDC_NEEDS_RESET) {
1770                         fdc->state = RESETCTLR;
1771                         fdc->flags &= ~FDC_NEEDS_RESET;
1772                 } else
1773                         fdc->state = DOSEEK;
1774                 break;
1775         case DOSEEK:
1776                 if (b_cylinder == (unsigned)fd->track)
1777                 {
1778                         fdc->state = SEEKCOMPLETE;
1779                         break;
1780                 }
1781                 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1782                            fd->fdsu, b_cylinder * fd->ft->steptrac,
1783                            0))
1784                 {
1785                         /*
1786                          * seek command not accepted, looks like
1787                          * the FDC went off to the Saints...
1788                          */
1789                         fdc->retry = 6; /* try a reset */
1790                         return(retrier(fdc));
1791                 }
1792                 fd->track = FD_NO_TRACK;
1793                 fdc->state = SEEKWAIT;
1794                 return(0);      /* will return later */
1795         case SEEKWAIT:
1796                 /* allow heads to settle */
1797                 timeout(fd_pseudointr, fdc, hz / 16);
1798                 fdc->state = SEEKCOMPLETE;
1799                 return(0);      /* will return later */
1800         case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1801                 /* Make sure seek really happened*/
1802                 if(fd->track == FD_NO_TRACK) {
1803                         int descyl = b_cylinder * fd->ft->steptrac;
1804                         do {
1805                                 /*
1806                                  * This might be a "ready changed" interrupt,
1807                                  * which cannot really happen since the
1808                                  * RDY pin is hardwired to + 5 volts.  This
1809                                  * generally indicates a "bouncing" intr
1810                                  * line, so do one of the following:
1811                                  *
1812                                  * When running on an enhanced FDC that is
1813                                  * known to not go stuck after responding
1814                                  * with INVALID, fetch all interrupt states
1815                                  * until seeing either an INVALID or a
1816                                  * real interrupt condition.
1817                                  *
1818                                  * When running on a dumb old NE765, give
1819                                  * up immediately.  The controller will
1820                                  * provide up to four dummy RC interrupt
1821                                  * conditions right after reset (for the
1822                                  * corresponding four drives), so this is
1823                                  * our only chance to get notice that it
1824                                  * was not the FDC that caused the interrupt.
1825                                  */
1826                                 if (fd_sense_int(fdc, &st0, &cyl)
1827                                     == FD_NOT_VALID)
1828                                         return 0;
1829                                 if(fdc->fdct == FDC_NE765
1830                                    && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1831                                         return 0; /* hope for a real intr */
1832                         } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1833
1834                         if (0 == descyl) {
1835                                 int failed = 0;
1836                                 /*
1837                                  * seek to cyl 0 requested; make sure we are
1838                                  * really there
1839                                  */
1840                                 if (fd_sense_drive_status(fdc, &st3))
1841                                         failed = 1;
1842                                 if ((st3 & NE7_ST3_T0) == 0) {
1843                                         printf(
1844                 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1845                                                fdu, st3, NE7_ST3BITS);
1846                                         failed = 1;
1847                                 }
1848
1849                                 if (failed) {
1850                                         if(fdc->retry < 3)
1851                                                 fdc->retry = 3;
1852                                         return (retrier(fdc));
1853                                 }
1854                         }
1855
1856                         if (cyl != descyl) {
1857                                 printf(
1858                 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1859                                        fdu, descyl, cyl, st0);
1860                                 if (fdc->retry < 3)
1861                                         fdc->retry = 3;
1862                                 return (retrier(fdc));
1863                         }
1864                 }
1865
1866                 fd->track = b_cylinder;
1867                 if (!(fdc->flags & FDC_NODMA))
1868                         isa_dmastart(bp->b_flags, bp->b_data+fd->skip,
1869                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
1870                 sectrac = fd->ft->sectrac;
1871                 sec = blknum %  (sectrac * fd->ft->heads);
1872                 head = sec / sectrac;
1873                 sec = sec % sectrac + 1;
1874                 fd->hddrv = ((head&1)<<2)+fdu;
1875
1876                 if(format || !read)
1877                 {
1878                         /* make sure the drive is writable */
1879                         if(fd_sense_drive_status(fdc, &st3) != 0)
1880                         {
1881                                 /* stuck controller? */
1882                                 if (!(fdc->flags & FDC_NODMA))
1883                                         isa_dmadone(bp->b_flags,
1884                                                     bp->b_data + fd->skip,
1885                                                     format ? bp->b_bcount : fdblk,
1886                                                     fdc->dmachan);
1887                                 fdc->retry = 6; /* reset the beast */
1888                                 return (retrier(fdc));
1889                         }
1890                         if(st3 & NE7_ST3_WP)
1891                         {
1892                                 /*
1893                                  * XXX YES! this is ugly.
1894                                  * in order to force the current operation
1895                                  * to fail, we will have to fake an FDC
1896                                  * error - all error handling is done
1897                                  * by the retrier()
1898                                  */
1899                                 fdc->status[0] = NE7_ST0_IC_AT;
1900                                 fdc->status[1] = NE7_ST1_NW;
1901                                 fdc->status[2] = 0;
1902                                 fdc->status[3] = fd->track;
1903                                 fdc->status[4] = head;
1904                                 fdc->status[5] = sec;
1905                                 fdc->retry = 8; /* break out immediately */
1906                                 fdc->state = IOTIMEDOUT; /* not really... */
1907                                 return (1);
1908                         }
1909                 }
1910
1911                 if (format) {
1912                         if (fdc->flags & FDC_NODMA) {
1913                                 /*
1914                                  * This seems to be necessary for
1915                                  * whatever obscure reason; if we omit
1916                                  * it, we end up filling the sector ID
1917                                  * fields of the newly formatted track
1918                                  * entirely with garbage, causing
1919                                  * `wrong cylinder' errors all over
1920                                  * the place when trying to read them
1921                                  * back.
1922                                  *
1923                                  * Umpf.
1924                                  */
1925                                 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1926
1927                                 (void)fdcpio(fdc,bp->b_flags,
1928                                         bp->b_data+fd->skip,
1929                                         bp->b_bcount);
1930
1931                         }
1932                         /* formatting */
1933                         if(fd_cmd(fdc, 6,  NE7CMD_FORMAT, head << 2 | fdu,
1934                                   finfo->fd_formb_secshift,
1935                                   finfo->fd_formb_nsecs,
1936                                   finfo->fd_formb_gaplen,
1937                                   finfo->fd_formb_fillbyte, 0)) {
1938                                 /* controller fell over */
1939                                 if (!(fdc->flags & FDC_NODMA))
1940                                         isa_dmadone(bp->b_flags,
1941                                                     bp->b_data + fd->skip,
1942                                                     format ? bp->b_bcount : fdblk,
1943                                                     fdc->dmachan);
1944                                 fdc->retry = 6;
1945                                 return (retrier(fdc));
1946                         }
1947                 } else {
1948                         if (fdc->flags & FDC_NODMA) {
1949                                 /*
1950                                  * this seems to be necessary even when
1951                                  * reading data
1952                                  */
1953                                 SET_BCDR(fdc, 1, fdblk, 0);
1954
1955                                 /*
1956                                  * perform the write pseudo-DMA before
1957                                  * the WRITE command is sent
1958                                  */
1959                                 if (!read)
1960                                         (void)fdcpio(fdc,bp->b_flags,
1961                                             bp->b_data+fd->skip,
1962                                             fdblk);
1963                         }
1964                         if (fd_cmd(fdc, 9,
1965                                    (read ? NE7CMD_READ : NE7CMD_WRITE),
1966                                    head << 2 | fdu,  /* head & unit */
1967                                    fd->track,        /* track */
1968                                    head,
1969                                    sec,              /* sector + 1 */
1970                                    fd->ft->secsize,  /* sector size */
1971                                    sectrac,          /* sectors/track */
1972                                    fd->ft->gap,      /* gap size */
1973                                    fd->ft->datalen,  /* data length */
1974                                    0)) {
1975                                 /* the beast is sleeping again */
1976                                 if (!(fdc->flags & FDC_NODMA))
1977                                         isa_dmadone(bp->b_flags,
1978                                                     bp->b_data + fd->skip,
1979                                                     format ? bp->b_bcount : fdblk,
1980                                                     fdc->dmachan);
1981                                 fdc->retry = 6;
1982                                 return (retrier(fdc));
1983                         }
1984                 }
1985                 if (fdc->flags & FDC_NODMA)
1986                         /*
1987                          * if this is a read, then simply await interrupt
1988                          * before performing PIO
1989                          */
1990                         if (read && !fdcpio(fdc,bp->b_flags,
1991                             bp->b_data+fd->skip,fdblk)) {
1992                                 fd->tohandle = timeout(fd_iotimeout, fdc, hz);
1993                                 return(0);      /* will return later */
1994                         };
1995
1996                 /*
1997                  * write (or format) operation will fall through and
1998                  * await completion interrupt
1999                  */
2000                 fdc->state = IOCOMPLETE;
2001                 fd->tohandle = timeout(fd_iotimeout, fdc, hz);
2002                 return (0);     /* will return later */
2003         case PIOREAD:
2004                 /* 
2005                  * actually perform the PIO read.  The IOCOMPLETE case
2006                  * removes the timeout for us.  
2007                  */
2008                 (void)fdcpio(fdc,bp->b_flags,bp->b_data+fd->skip,fdblk);
2009                 fdc->state = IOCOMPLETE;
2010                 /* FALLTHROUGH */
2011         case IOCOMPLETE: /* IO DONE, post-analyze */
2012                 untimeout(fd_iotimeout, fdc, fd->tohandle);
2013
2014                 if (fd_read_status(fdc, fd->fdsu)) {
2015                         if (!(fdc->flags & FDC_NODMA))
2016                                 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
2017                                             format ? bp->b_bcount : fdblk,
2018                                             fdc->dmachan);
2019                         if (fdc->retry < 6)
2020                                 fdc->retry = 6; /* force a reset */
2021                         return (retrier(fdc));
2022                 }
2023
2024                 fdc->state = IOTIMEDOUT;
2025
2026                 /* FALLTHROUGH */
2027
2028         case IOTIMEDOUT:
2029                 if (!(fdc->flags & FDC_NODMA))
2030                         isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
2031                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
2032                 if (fdc->status[0] & NE7_ST0_IC) {
2033                         if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2034                             && fdc->status[1] & NE7_ST1_OR) {
2035                                 /*
2036                                  * DMA overrun. Someone hogged the bus and
2037                                  * didn't release it in time for the next
2038                                  * FDC transfer.
2039                                  *
2040                                  * We normally restart this without bumping
2041                                  * the retry counter.  However, in case
2042                                  * something is seriously messed up (like
2043                                  * broken hardware), we rather limit the
2044                                  * number of retries so the IO operation
2045                                  * doesn't block indefinately.
2046                                  */
2047                                 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
2048                                         fdc->state = SEEKCOMPLETE;
2049                                         return (1);
2050                                 } /* else fall through */
2051                         }
2052                         if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
2053                                 && fdc->retry < 6)
2054                                 fdc->retry = 6; /* force a reset */
2055                         else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2056                                 && fdc->status[2] & NE7_ST2_WC
2057                                 && fdc->retry < 3)
2058                                 fdc->retry = 3; /* force recalibrate */
2059                         return (retrier(fdc));
2060                 }
2061                 /* All OK */
2062                 /* Operation successful, retry DMA overruns again next time. */
2063                 fdc->dma_overruns = 0;
2064                 fd->skip += fdblk;
2065                 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
2066                         /* set up next transfer */
2067                         fdc->state = DOSEEK;
2068                 } else {
2069                         /* ALL DONE */
2070                         fd->skip = 0;
2071                         fdc->bp = NULL;
2072                         device_unbusy(fd->dev);
2073                         devstat_end_transaction_buf(&fd->device_stats, bp);
2074                         biodone(bp);
2075                         fdc->fd = (fd_p) 0;
2076                         fdc->fdu = -1;
2077                         fdc->state = FINDWORK;
2078                 }
2079                 return (1);
2080         case RESETCTLR:
2081                 fdc_reset(fdc);
2082                 fdc->retry++;
2083                 fdc->state = RESETCOMPLETE;
2084                 return (0);
2085         case RESETCOMPLETE:
2086                 /*
2087                  * Discard all the results from the reset so that they
2088                  * can't cause an unexpected interrupt later.
2089                  */
2090                 for (i = 0; i < 4; i++)
2091                         (void)fd_sense_int(fdc, &st0, &cyl);
2092                 fdc->state = STARTRECAL;
2093                 /* Fall through. */
2094         case STARTRECAL:
2095                 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
2096                         /* arrgl */
2097                         fdc->retry = 6;
2098                         return (retrier(fdc));
2099                 }
2100                 fdc->state = RECALWAIT;
2101                 return (0);     /* will return later */
2102         case RECALWAIT:
2103                 /* allow heads to settle */
2104                 timeout(fd_pseudointr, fdc, hz / 8);
2105                 fdc->state = RECALCOMPLETE;
2106                 return (0);     /* will return later */
2107         case RECALCOMPLETE:
2108                 do {
2109                         /*
2110                          * See SEEKCOMPLETE for a comment on this:
2111                          */
2112                         if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2113                                 return 0;
2114                         if(fdc->fdct == FDC_NE765
2115                            && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2116                                 return 0; /* hope for a real intr */
2117                 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2118                 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2119                 {
2120                         if(fdc->retry > 3)
2121                                 /*
2122                                  * a recalibrate from beyond cylinder 77
2123                                  * will "fail" due to the FDC limitations;
2124                                  * since people used to complain much about
2125                                  * the failure message, try not logging
2126                                  * this one if it seems to be the first
2127                                  * time in a line
2128                                  */
2129                                 printf("fd%d: recal failed ST0 %b cyl %d\n",
2130                                        fdu, st0, NE7_ST0BITS, cyl);
2131                         if(fdc->retry < 3) fdc->retry = 3;
2132                         return (retrier(fdc));
2133                 }
2134                 fd->track = 0;
2135                 /* Seek (probably) necessary */
2136                 fdc->state = DOSEEK;
2137                 return (1);     /* will return immediatly */
2138         case MOTORWAIT:
2139                 if(fd->flags & FD_MOTOR_WAIT)
2140                 {
2141                         return (0); /* time's not up yet */
2142                 }
2143                 if (fdc->flags & FDC_NEEDS_RESET) {
2144                         fdc->state = RESETCTLR;
2145                         fdc->flags &= ~FDC_NEEDS_RESET;
2146                 } else {
2147                         /*
2148                          * If all motors were off, then the controller was
2149                          * reset, so it has lost track of the current
2150                          * cylinder.  Recalibrate to handle this case.
2151                          * But first, discard the results of the reset.
2152                          */
2153                         fdc->state = RESETCOMPLETE;
2154                 }
2155                 return (1);     /* will return immediatly */
2156         default:
2157                 device_printf(fdc->fdc_dev, "unexpected FD int->");
2158                 if (fd_read_status(fdc, fd->fdsu) == 0)
2159                         printf("FDC status :%x %x %x %x %x %x %x   ",
2160                                fdc->status[0],
2161                                fdc->status[1],
2162                                fdc->status[2],
2163                                fdc->status[3],
2164                                fdc->status[4],
2165                                fdc->status[5],
2166                                fdc->status[6] );
2167                 else
2168                         printf("No status available   ");
2169                 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2170                 {
2171                         printf("[controller is dead now]\n");
2172                         return (0);
2173                 }
2174                 printf("ST0 = %x, PCN = %x\n", st0, cyl);
2175                 return (0);
2176         }
2177         /*XXX confusing: some branches return immediately, others end up here*/
2178         return (1); /* Come back immediatly to new state */
2179 }
2180
2181 static int
2182 retrier(struct fdc_data *fdc)
2183 {
2184         register struct buf *bp;
2185         struct fd_data *fd;
2186         int fdu;
2187
2188         bp = fdc->bp;
2189
2190         /* XXX shouldn't this be cached somewhere?  */
2191         fdu = FDUNIT(minor(bp->b_dev));
2192         fd = devclass_get_softc(fd_devclass, fdu);
2193         if (fd->options & FDOPT_NORETRY)
2194                 goto fail;
2195
2196         switch (fdc->retry) {
2197         case 0: case 1: case 2:
2198                 fdc->state = SEEKCOMPLETE;
2199                 break;
2200         case 3: case 4: case 5:
2201                 fdc->state = STARTRECAL;
2202                 break;
2203         case 6:
2204                 fdc->state = RESETCTLR;
2205                 break;
2206         case 7:
2207                 break;
2208         default:
2209         fail:
2210                 {
2211                         int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2212                         dev_t sav_b_dev = bp->b_dev;
2213
2214                         /* Trick diskerr */
2215                         bp->b_dev = makedev(major(bp->b_dev),
2216                                     (FDUNIT(minor(bp->b_dev))<<3)|RAW_PART);
2217                         if (printerror)
2218                                 diskerr(bp, "hard error", LOG_PRINTF,
2219                                         fdc->fd->skip / DEV_BSIZE,
2220                                         (struct disklabel *)NULL);
2221                         bp->b_dev = sav_b_dev;
2222                         if (printerror) {
2223                                 if (fdc->flags & FDC_STAT_VALID)
2224                                         printf(
2225                         " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2226                                                fdc->status[0], NE7_ST0BITS,
2227                                                fdc->status[1], NE7_ST1BITS,
2228                                                fdc->status[2], NE7_ST2BITS,
2229                                                fdc->status[3], fdc->status[4],
2230                                                fdc->status[5]);
2231                                 else
2232                                         printf(" (No status)\n");
2233                         }
2234                 }
2235                 bp->b_flags |= B_ERROR;
2236                 bp->b_error = EIO;
2237                 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2238                 fdc->bp = NULL;
2239                 fdc->fd->skip = 0;
2240                 device_unbusy(fd->dev);
2241                 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2242                 biodone(bp);
2243                 fdc->state = FINDWORK;
2244                 fdc->flags |= FDC_NEEDS_RESET;
2245                 fdc->fd = (fd_p) 0;
2246                 fdc->fdu = -1;
2247                 return (1);
2248         }
2249         fdc->retry++;
2250         return (1);
2251 }
2252
2253 static int
2254 fdformat(dev_t dev, struct fd_formb *finfo, struct thread *td)
2255 {
2256         struct proc *p = td->td_proc;
2257         fdu_t   fdu;
2258         fd_p    fd;
2259
2260         struct buf *bp;
2261         int rv = 0, s;
2262         size_t fdblk;
2263
2264         fdu     = FDUNIT(minor(dev));
2265         fd      = devclass_get_softc(fd_devclass, fdu);
2266         fdblk = 128 << fd->ft->secsize;
2267
2268         /* set up a buffer header for fdstrategy() */
2269         bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT);
2270         if(bp == 0)
2271                 return ENOBUFS;
2272         /*
2273          * keep the process from being swapped
2274          */
2275         PHOLD(p);
2276         bzero((void *)bp, sizeof(struct buf));
2277         BUF_LOCKINIT(bp);
2278         BUF_LOCK(bp, LK_EXCLUSIVE);
2279         bp->b_flags = B_PHYS | B_FORMAT;
2280
2281         /*
2282          * calculate a fake blkno, so fdstrategy() would initiate a
2283          * seek to the requested cylinder
2284          */
2285         bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
2286                 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
2287
2288         bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2289         bp->b_data = (caddr_t)finfo;
2290
2291         /* now do the format */
2292         bp->b_dev = dev;
2293         BUF_STRATEGY(bp, 0);
2294
2295         /* ...and wait for it to complete */
2296         s = splbio();
2297         while(!(bp->b_flags & B_DONE)) {
2298                 rv = tsleep((caddr_t)bp, 0, "fdform", 20 * hz);
2299                 if (rv == EWOULDBLOCK)
2300                         break;
2301         }
2302         splx(s);
2303
2304         if (rv == EWOULDBLOCK) {
2305                 /* timed out */
2306                 rv = EIO;
2307                 device_unbusy(fd->dev);
2308                 biodone(bp);
2309         }
2310         if (bp->b_flags & B_ERROR)
2311                 rv = bp->b_error;
2312         /*
2313          * allow the process to be swapped
2314          */
2315         PRELE(p);
2316         BUF_UNLOCK(bp);
2317         BUF_LOCKFREE(bp);
2318         free(bp, M_TEMP);
2319         return rv;
2320 }
2321
2322 /*
2323  * TODO: don't allocate buffer on stack.
2324  */
2325
2326 static int
2327 fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
2328 {
2329         fdu_t   fdu = FDUNIT(minor(dev));
2330         fd_p    fd = devclass_get_softc(fd_devclass, fdu);
2331         size_t fdblk;
2332
2333         struct fd_type *fdt;
2334         struct disklabel *dl;
2335         struct fdc_status *fsp;
2336         char buffer[DEV_BSIZE];
2337         int error = 0;
2338
2339         fdblk = 128 << fd->ft->secsize;
2340
2341         switch (cmd) {
2342         case DIOCGDINFO:
2343                 bzero(buffer, sizeof (buffer));
2344                 dl = (struct disklabel *)buffer;
2345                 dl->d_secsize = fdblk;
2346                 fdt = fd->ft;
2347                 dl->d_secpercyl = fdt->size / fdt->tracks;
2348                 dl->d_type = DTYPE_FLOPPY;
2349
2350                 if (readdisklabel(dev, dl)
2351                     == NULL)
2352                         error = 0;
2353                 else
2354                         error = EINVAL;
2355
2356                 *(struct disklabel *)addr = *dl;
2357                 break;
2358
2359         case DIOCSDINFO:
2360                 if ((flag & FWRITE) == 0)
2361                         error = EBADF;
2362                 break;
2363
2364         case DIOCWLABEL:
2365                 if ((flag & FWRITE) == 0)
2366                         error = EBADF;
2367                 break;
2368
2369         case DIOCWDINFO:
2370                 if ((flag & FWRITE) == 0) {
2371                         error = EBADF;
2372                         break;
2373                 }
2374
2375                 dl = (struct disklabel *)addr;
2376
2377                 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2378                                           (u_long)0)) != 0)
2379                         break;
2380
2381                 error = writedisklabel(dev, (struct disklabel *)buffer);
2382                 break;
2383         case FD_FORM:
2384                 if ((flag & FWRITE) == 0)
2385                         error = EBADF;  /* must be opened for writing */
2386                 else if (((struct fd_formb *)addr)->format_version !=
2387                         FD_FORMAT_VERSION)
2388                         error = EINVAL; /* wrong version of formatting prog */
2389                 else
2390                         error = fdformat(dev, (struct fd_formb *)addr, td);
2391                 break;
2392
2393         case FD_GTYPE:                  /* get drive type */
2394                 *(struct fd_type *)addr = *fd->ft;
2395                 break;
2396
2397         case FD_STYPE:                  /* set drive type */
2398                 /* this is considered harmful; only allow for superuser */
2399                 if (suser(td) != 0)
2400                         return EPERM;
2401                 *fd->ft = *(struct fd_type *)addr;
2402                 break;
2403
2404         case FD_GOPTS:                  /* get drive options */
2405                 *(int *)addr = fd->options;
2406                 break;
2407
2408         case FD_SOPTS:                  /* set drive options */
2409                 fd->options = *(int *)addr;
2410                 break;
2411
2412         case FD_GSTAT:
2413                 fsp = (struct fdc_status *)addr;
2414                 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2415                         return EINVAL;
2416                 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2417                 break;
2418
2419         default:
2420                 error = ENOTTY;
2421                 break;
2422         }
2423         return (error);
2424 }
2425
2426 /*
2427  * Hello emacs, these are the
2428  * Local Variables:
2429  *  c-indent-level:               8
2430  *  c-continued-statement-offset: 8
2431  *  c-continued-brace-offset:     0
2432  *  c-brace-offset:              -8
2433  *  c-brace-imaginary-offset:     0
2434  *  c-argdecl-indent:             8
2435  *  c-label-offset:              -8
2436  *  c++-hanging-braces:           1
2437  *  c++-access-specifier-offset: -8
2438  *  c++-empty-arglist-indent:     8
2439  *  c++-friend-offset:            0
2440  * End:
2441  */