Style(9) cleanup to src/sys/vfs, stage 20/21: umapfs.
[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 1.15 2004/05/13 23:49:15 dillon Exp $
55  *
56  */
57
58 #include "opt_fdc.h"
59 #include "use_pccard.h"
60
61 #include <sys/param.h>
62 #include <sys/systm.h>
63 #include <sys/bootmaj.h>
64 #include <sys/kernel.h>
65 #include <sys/buf.h>
66 #include <sys/bus.h>
67 #include <sys/conf.h>
68 #include <sys/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 <bus/isa/isavar.h>
89 #include <bus/isa/isareg.h>
90 #include "fdreg.h"
91 #include "fdc.h"
92 #include <bus/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 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 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 0
319
320 static u_int8_t
321 fdin_rd(fdc_p fdc)
322 {
323         return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
324 }
325
326 #endif
327
328 static  d_open_t        Fdopen; /* NOTE, not fdopen */
329 static  d_close_t       fdclose;
330 static  d_ioctl_t       fdioctl;
331 static  d_strategy_t    fdstrategy;
332
333 static struct cdevsw fd_cdevsw = {
334         /* name */      "fd",
335         /* maj */       FD_CDEV_MAJOR,
336         /* flags */     D_DISK,
337         /* port */      NULL,
338         /* clone */     NULL,
339
340         /* open */      Fdopen,
341         /* close */     fdclose,
342         /* read */      physread,
343         /* write */     physwrite,
344         /* ioctl */     fdioctl,
345         /* poll */      nopoll,
346         /* mmap */      nommap,
347         /* strategy */  fdstrategy,
348         /* dump */      nodump,
349         /* psize */     nopsize
350 };
351
352 static int
353 fdc_err(struct fdc_data *fdc, const char *s)
354 {
355         fdc->fdc_errs++;
356         if (s) {
357                 if (fdc->fdc_errs < FDC_ERRMAX)
358                         device_printf(fdc->fdc_dev, "%s", s);
359                 else if (fdc->fdc_errs == FDC_ERRMAX)
360                         device_printf(fdc->fdc_dev, "too many errors, not "
361                                                     "logging any more\n");
362         }
363
364         return FD_FAILED;
365 }
366
367 /*
368  * fd_cmd: Send a command to the chip.  Takes a varargs with this structure:
369  * Unit number,
370  * # of output bytes, output bytes as ints ...,
371  * # of input bytes, input bytes as ints ...
372  */
373 int
374 fd_cmd(struct fdc_data *fdc, int n_out, ...)
375 {
376         u_char cmd;
377         int n_in;
378         int n;
379         __va_list ap;
380
381         __va_start(ap, n_out);
382         cmd = (u_char)(__va_arg(ap, int));
383         __va_end(ap);
384         __va_start(ap, n_out);
385         for (n = 0; n < n_out; n++)
386         {
387                 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
388                 {
389                         char msg[50];
390                         snprintf(msg, sizeof(msg),
391                                 "cmd %x failed at out byte %d of %d\n",
392                                 cmd, n + 1, n_out);
393                         return fdc_err(fdc, msg);
394                 }
395         }
396         n_in = __va_arg(ap, int);
397         for (n = 0; n < n_in; n++)
398         {
399                 int *ptr = __va_arg(ap, int *);
400                 if (fd_in(fdc, ptr) < 0)
401                 {
402                         char msg[50];
403                         snprintf(msg, sizeof(msg),
404                                 "cmd %02x failed at in byte %d of %d\n",
405                                 cmd, n + 1, n_in);
406                         return fdc_err(fdc, msg);
407                 }
408         }
409
410         return 0;
411 }
412
413 static int 
414 enable_fifo(fdc_p fdc)
415 {
416         int i, j;
417
418         if ((fdc->flags & FDC_HAS_FIFO) == 0) {
419                 
420                 /*
421                  * XXX: 
422                  * Cannot use fd_cmd the normal way here, since
423                  * this might be an invalid command. Thus we send the
424                  * first byte, and check for an early turn of data directon.
425                  */
426                 
427                 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
428                         return fdc_err(fdc, "Enable FIFO failed\n");
429                 
430                 /* If command is invalid, return */
431                 j = FDSTS_TIMEOUT;
432                 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
433                        != NE7_RQM && j-- > 0) {
434                         if (i == (NE7_DIO | NE7_RQM)) {
435                                 fdc_reset(fdc);
436                                 return FD_FAILED;
437                         }
438                         DELAY(1);
439                 }
440                 if (j<0 || 
441                     fd_cmd(fdc, 3,
442                            0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
443                         fdc_reset(fdc);
444                         return fdc_err(fdc, "Enable FIFO failed\n");
445                 }
446                 fdc->flags |= FDC_HAS_FIFO;
447                 return 0;
448         }
449         if (fd_cmd(fdc, 4,
450                    I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
451                 return fdc_err(fdc, "Re-enable FIFO failed\n");
452         return 0;
453 }
454
455 static int
456 fd_sense_drive_status(fdc_p fdc, int *st3p)
457 {
458         int st3;
459
460         if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
461         {
462                 return fdc_err(fdc, "Sense Drive Status failed\n");
463         }
464         if (st3p)
465                 *st3p = st3;
466
467         return 0;
468 }
469
470 static int
471 fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
472 {
473         int cyl, st0, ret;
474
475         ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
476         if (ret) {
477                 (void)fdc_err(fdc,
478                               "sense intr err reading stat reg 0\n");
479                 return ret;
480         }
481
482         if (st0p)
483                 *st0p = st0;
484
485         if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
486                 /*
487                  * There doesn't seem to have been an interrupt.
488                  */
489                 return FD_NOT_VALID;
490         }
491
492         if (fd_in(fdc, &cyl) < 0) {
493                 return fdc_err(fdc, "can't get cyl num\n");
494         }
495
496         if (cylp)
497                 *cylp = cyl;
498
499         return 0;
500 }
501
502
503 static int
504 fd_read_status(fdc_p fdc, int fdsu)
505 {
506         int i, ret;
507
508         for (i = 0; i < 7; i++) {
509                 /*
510                  * XXX types are poorly chosen.  Only bytes can by read
511                  * from the hardware, but fdc->status[] wants u_ints and
512                  * fd_in() gives ints.
513                  */
514                 int status;
515
516                 ret = fd_in(fdc, &status);
517                 fdc->status[i] = status;
518                 if (ret != 0)
519                         break;
520         }
521
522         if (ret == 0)
523                 fdc->flags |= FDC_STAT_VALID;
524         else
525                 fdc->flags &= ~FDC_STAT_VALID;
526
527         return ret;
528 }
529
530 /****************************************************************************/
531 /*                      autoconfiguration stuff                             */
532 /****************************************************************************/
533
534 int
535 fdc_alloc_resources(struct fdc_data *fdc)
536 {
537         device_t dev;
538         int ispnp, ispcmcia;
539
540         dev = fdc->fdc_dev;
541         ispnp = (fdc->flags & FDC_ISPNP) != 0;
542         ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
543         fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
544         fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
545
546         /*
547          * On standard ISA, we don't just use an 8 port range
548          * (e.g. 0x3f0-0x3f7) since that covers an IDE control
549          * register at 0x3f6.
550          *
551          * Isn't PC hardware wonderful.
552          *
553          * The Y-E Data PCMCIA FDC doesn't have this problem, it
554          * uses the register with offset 6 for pseudo-DMA, and the
555          * one with offset 7 as control register.
556          */
557         fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
558                                              &fdc->rid_ioport, 0ul, ~0ul, 
559                                              ispcmcia ? 8 : (ispnp ? 1 : 6),
560                                              RF_ACTIVE);
561         if (fdc->res_ioport == 0) {
562                 device_printf(dev, "cannot reserve I/O port range\n");
563                 return ENXIO;
564         }
565         fdc->portt = rman_get_bustag(fdc->res_ioport);
566         fdc->porth = rman_get_bushandle(fdc->res_ioport);
567
568         if (!ispcmcia) {
569                 /*
570                  * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
571                  * and some at 0x3f0-0x3f5,0x3f7. We detect the former
572                  * by checking the size and adjust the port address
573                  * accordingly.
574                  */
575                 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
576                         fdc->port_off = -2;
577
578                 /*
579                  * Register the control port range as rid 1 if it
580                  * isn't there already. Most PnP BIOSen will have
581                  * already done this but non-PnP configurations don't.
582                  *
583                  * And some (!!) report 0x3f2-0x3f5 and completely
584                  * leave out the control register!  It seems that some
585                  * non-antique controller chips have a different
586                  * method of programming the transfer speed which
587                  * doesn't require the control register, but it's
588                  * mighty bogus as the chip still responds to the
589                  * address for the control register.
590                  */
591                 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
592                         u_long ctlstart;
593
594                         /* Find the control port, usually 0x3f7 */
595                         ctlstart = rman_get_start(fdc->res_ioport) +
596                                 fdc->port_off + 7;
597
598                         bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
599                 }
600
601                 /*
602                  * Now (finally!) allocate the control port.
603                  */
604                 fdc->rid_ctl = 1;
605                 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
606                                                   &fdc->rid_ctl,
607                                                   0ul, ~0ul, 1, RF_ACTIVE);
608                 if (fdc->res_ctl == 0) {
609                         device_printf(dev,
610                                       "cannot reserve control I/O port range\n");
611                         return ENXIO;
612                 }
613                 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
614                 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
615         }
616
617         fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
618                                           &fdc->rid_irq, 0ul, ~0ul, 1, 
619                                           RF_ACTIVE);
620         if (fdc->res_irq == 0) {
621                 device_printf(dev, "cannot reserve interrupt line\n");
622                 return ENXIO;
623         }
624
625         if ((fdc->flags & FDC_NODMA) == 0) {
626                 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
627                                                   &fdc->rid_drq, 0ul, ~0ul, 1, 
628                                                   RF_ACTIVE);
629                 if (fdc->res_drq == 0) {
630                         device_printf(dev, "cannot reserve DMA request line\n");
631                         return ENXIO;
632                 }
633                 fdc->dmachan = fdc->res_drq->r_start;
634         }
635
636         return 0;
637 }
638
639 void
640 fdc_release_resources(struct fdc_data *fdc)
641 {
642         device_t dev;
643
644         dev = fdc->fdc_dev;
645         if (fdc->res_irq != 0) {
646                 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
647                                         fdc->res_irq);
648                 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
649                                      fdc->res_irq);
650         }
651         if (fdc->res_ctl != 0) {
652                 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
653                                         fdc->res_ctl);
654                 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
655                                      fdc->res_ctl);
656         }
657         if (fdc->res_ioport != 0) {
658                 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
659                                         fdc->res_ioport);
660                 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
661                                      fdc->res_ioport);
662         }
663         if (fdc->res_drq != 0) {
664                 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
665                                         fdc->res_drq);
666                 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
667                                      fdc->res_drq);
668         }
669 }
670
671 /****************************************************************************/
672 /*                      autoconfiguration stuff                             */
673 /****************************************************************************/
674
675 static struct isa_pnp_id fdc_ids[] = {
676         {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
677         {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
678         {0}
679 };
680
681 int
682 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
683 {
684         struct fdc_ivars *ivars = device_get_ivars(child);
685
686         switch (which) {
687         case FDC_IVAR_FDUNIT:
688                 *result = ivars->fdunit;
689                 break;
690         default:
691                 return ENOENT;
692         }
693         return 0;
694 }
695
696 /*
697  * fdc controller section.
698  */
699 static int
700 fdc_probe(device_t dev)
701 {
702         int     error, ic_type;
703         struct  fdc_data *fdc;
704
705         fdc = device_get_softc(dev);
706         bzero(fdc, sizeof *fdc);
707         fdc->fdc_dev = dev;
708         fdc->fdctl_wr = fdctl_wr_isa;
709
710         /* Check pnp ids */
711         error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
712         if (error == ENXIO)
713                 return ENXIO;
714         if (error == 0)
715                 fdc->flags |= FDC_ISPNP;
716
717         /* Attempt to allocate our resources for the duration of the probe */
718         error = fdc_alloc_resources(fdc);
719         if (error)
720                 goto out;
721
722         /* First - lets reset the floppy controller */
723         fdout_wr(fdc, 0);
724         DELAY(100);
725         fdout_wr(fdc, FDO_FRST);
726
727         /* see if it can handle a command */
728         if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 
729                    NE7_SPEC_2(2, 0), 0)) {
730                 error = ENXIO;
731                 goto out;
732         }
733
734         if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
735                 ic_type = (u_char)ic_type;
736                 switch (ic_type) {
737                 case 0x80:
738                         device_set_desc(dev, "NEC 765 or clone");
739                         fdc->fdct = FDC_NE765;
740                         break;
741                 case 0x81:
742                         device_set_desc(dev, "Intel 82077 or clone");
743                         fdc->fdct = FDC_I82077;
744                         break;
745                 case 0x90:
746                         device_set_desc(dev, "NEC 72065B or clone");
747                         fdc->fdct = FDC_NE72065;
748                         break;
749                 default:
750                         device_set_desc(dev, "generic floppy controller");
751                         fdc->fdct = FDC_UNKNOWN;
752                         break;
753                 }
754         }
755
756 out:
757         fdc_release_resources(fdc);
758         return (error);
759 }
760
761 /*
762  * Add a child device to the fdc controller.  It will then be probed etc.
763  */
764 static void
765 fdc_add_child(device_t dev, const char *name, int unit)
766 {
767         int     disabled;
768         struct fdc_ivars *ivar;
769         device_t child;
770
771         ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
772         if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
773                 ivar->fdunit = 0;
774         child = device_add_child(dev, name, unit);
775         if (child == NULL)
776                 return;
777         device_set_ivars(child, ivar);
778         if (resource_int_value(name, unit, "disabled", &disabled) == 0
779             && disabled != 0)
780                 device_disable(child);
781 }
782
783 int
784 fdc_attach(device_t dev)
785 {
786         struct  fdc_data *fdc;
787         int     i, error;
788
789         fdc = device_get_softc(dev);
790         error = fdc_alloc_resources(fdc);
791         if (error) {
792                 device_printf(dev, "cannot re-aquire resources\n");
793                 return error;
794         }
795         error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
796                                INTR_TYPE_BIO, fdc_intr, fdc, &fdc->fdc_intr);
797         if (error) {
798                 device_printf(dev, "cannot setup interrupt\n");
799                 return error;
800         }
801         fdc->fdcu = device_get_unit(dev);
802         fdc->flags |= FDC_ATTACHED;
803
804         if ((fdc->flags & FDC_NODMA) == 0) {
805                 /* Acquire the DMA channel forever, The driver will do the rest */
806                                 /* XXX should integrate with rman */
807                 isa_dma_acquire(fdc->dmachan);
808                 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
809         }
810         fdc->state = DEVIDLE;
811
812         /* reset controller, turn motor off, clear fdout mirror reg */
813         fdout_wr(fdc, ((fdc->fdout = 0)));
814         bufq_init(&fdc->head);
815
816         /*
817          * Probe and attach any children.  We should probably detect
818          * devices from the BIOS unless overridden.
819          */
820         for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
821              i != -1;
822              i = resource_query_string(i, "at", device_get_nameunit(dev)))
823                 fdc_add_child(dev, resource_query_name(i),
824                                resource_query_unit(i));
825
826         return (bus_generic_attach(dev));
827 }
828
829 int
830 fdc_print_child(device_t me, device_t child)
831 {
832         int retval = 0;
833
834         retval += bus_print_child_header(me, child);
835         retval += printf(" on %s drive %d\n", device_get_nameunit(me),
836                fdc_get_fdunit(child));
837         
838         return (retval);
839 }
840
841 static device_method_t fdc_methods[] = {
842         /* Device interface */
843         DEVMETHOD(device_probe,         fdc_probe),
844         DEVMETHOD(device_attach,        fdc_attach),
845         DEVMETHOD(device_detach,        bus_generic_detach),
846         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
847         DEVMETHOD(device_suspend,       bus_generic_suspend),
848         DEVMETHOD(device_resume,        bus_generic_resume),
849
850         /* Bus interface */
851         DEVMETHOD(bus_print_child,      fdc_print_child),
852         DEVMETHOD(bus_read_ivar,        fdc_read_ivar),
853         /* Our children never use any other bus interface methods. */
854
855         { 0, 0 }
856 };
857
858 static driver_t fdc_driver = {
859         "fdc",
860         fdc_methods,
861         sizeof(struct fdc_data)
862 };
863
864 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
865
866 /******************************************************************/
867 /*
868  * devices attached to the controller section.  
869  */
870 static int
871 fd_probe(device_t dev)
872 {
873         int     i;
874         u_int   fdt, st0, st3;
875         struct  fd_data *fd;
876         struct  fdc_data *fdc;
877         fdsu_t  fdsu;
878         static int fd_fifo = 0;
879
880         fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
881         fd = device_get_softc(dev);
882         fdc = device_get_softc(device_get_parent(dev));
883
884         bzero(fd, sizeof *fd);
885         fd->dev = dev;
886         fd->fdc = fdc;
887         fd->fdsu = fdsu;
888         fd->fdu = device_get_unit(dev);
889
890 #ifdef __i386__
891         /* look up what bios thinks we have */
892         switch (fd->fdu) {
893         case 0:
894                 if ((fdc->flags & FDC_ISPCMCIA))
895                         fdt = RTCFDT_144M;
896                 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
897                         fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
898                 else
899                         fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
900                 break;
901         case 1:
902                 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
903                 break;
904         default:
905                 fdt = RTCFDT_NONE;
906                 break;
907         }
908 #else
909         fdt = RTCFDT_144M;      /* XXX probably */
910 #endif
911
912         /* is there a unit? */
913         if (fdt == RTCFDT_NONE)
914                 return (ENXIO);
915
916         /* select it */
917         set_motor(fdc, fdsu, TURNON);
918         DELAY(1000000); /* 1 sec */
919
920         /* XXX This doesn't work before the first set_motor() */
921         if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
922             && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
923             && enable_fifo(fdc) == 0) {
924                 device_printf(device_get_parent(dev),
925                     "FIFO enabled, %d bytes threshold\n", fifo_threshold);
926         }
927         fd_fifo = 1;
928
929         if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
930             && (st3 & NE7_ST3_T0)) {
931                 /* if at track 0, first seek inwards */
932                 /* seek some steps: */
933                 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
934                 DELAY(300000); /* ...wait a moment... */
935                 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
936         }
937
938         /* If we're at track 0 first seek inwards. */
939         if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
940                 /* Seek some steps... */
941                 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
942                         /* ...wait a moment... */
943                         DELAY(300000);
944                         /* make ctrlr happy: */
945                         fd_sense_int(fdc, 0, 0);
946                 }
947         }
948
949         for (i = 0; i < 2; i++) {
950                 /*
951                  * we must recalibrate twice, just in case the
952                  * heads have been beyond cylinder 76, since most
953                  * FDCs still barf when attempting to recalibrate
954                  * more than 77 steps
955                  */
956                 /* go back to 0: */
957                 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
958                         /* a second being enough for full stroke seek*/
959                         DELAY(i == 0 ? 1000000 : 300000);
960
961                         /* anything responding? */
962                         if (fd_sense_int(fdc, &st0, 0) == 0 &&
963                             (st0 & NE7_ST0_EC) == 0)
964                                 break; /* already probed succesfully */
965                 }
966         }
967
968         set_motor(fdc, fdsu, TURNOFF);
969
970         if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
971                 return (ENXIO);
972
973         fd->track = FD_NO_TRACK;
974         fd->fdc = fdc;
975         fd->fdsu = fdsu;
976         fd->options = 0;
977         callout_handle_init(&fd->toffhandle);
978         callout_handle_init(&fd->tohandle);
979
980         switch (fdt) {
981         case RTCFDT_12M:
982                 device_set_desc(dev, "1200-KB 5.25\" drive");
983                 fd->type = FD_1200;
984                 break;
985         case RTCFDT_144M | RTCFDT_144M_PRETENDED:
986                 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
987                 fdt = RTCFDT_144M;
988                 fd->type = FD_1440;
989         case RTCFDT_144M:
990                 device_set_desc(dev, "1440-KB 3.5\" drive");
991                 fd->type = FD_1440;
992                 break;
993         case RTCFDT_288M:
994         case RTCFDT_288M_1:
995                 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
996                 fd->type = FD_1440;
997                 break;
998         case RTCFDT_360K:
999                 device_set_desc(dev, "360-KB 5.25\" drive");
1000                 fd->type = FD_360;
1001                 break;
1002         case RTCFDT_720K:
1003                 printf("720-KB 3.5\" drive");
1004                 fd->type = FD_720;
1005                 break;
1006         default:
1007                 return (ENXIO);
1008         }
1009         return (0);
1010 }
1011
1012 static int
1013 fd_attach(device_t dev)
1014 {
1015         struct  fd_data *fd;
1016 #if 0
1017         int     i;
1018         int     mynor;
1019         int     typemynor;
1020         int     typesize;
1021 #endif
1022         static int cdevsw_add_done = 0;
1023
1024         fd = device_get_softc(dev);
1025
1026         if (!cdevsw_add_done) {
1027                 cdevsw_add(&fd_cdevsw); /* XXX */
1028                 cdevsw_add_done++;
1029         }
1030         make_dev(&fd_cdevsw, (fd->fdu << 6),
1031                 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu);
1032
1033 #if 0
1034         /* Other make_dev() go here. */
1035 #endif
1036
1037         /*
1038          * Export the drive to the devstat interface.
1039          */
1040         devstat_add_entry(&fd->device_stats, device_get_name(dev), 
1041                           device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1042                           DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1043                           DEVSTAT_PRIORITY_FD);
1044         return (0);
1045 }
1046
1047 static int
1048 fd_detach(device_t dev)
1049 {
1050         struct  fd_data *fd;
1051
1052         fd = device_get_softc(dev);
1053         untimeout(fd_turnoff, fd, fd->toffhandle);
1054
1055         return (0);
1056 }
1057
1058 static device_method_t fd_methods[] = {
1059         /* Device interface */
1060         DEVMETHOD(device_probe,         fd_probe),
1061         DEVMETHOD(device_attach,        fd_attach),
1062         DEVMETHOD(device_detach,        fd_detach),
1063         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
1064         DEVMETHOD(device_suspend,       bus_generic_suspend), /* XXX */
1065         DEVMETHOD(device_resume,        bus_generic_resume), /* XXX */
1066
1067         { 0, 0 }
1068 };
1069
1070 static driver_t fd_driver = {
1071         "fd",
1072         fd_methods,
1073         sizeof(struct fd_data)
1074 };
1075
1076 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1077
1078 /****************************************************************************/
1079 /*                            motor control stuff                           */
1080 /*              remember to not deselect the drive we're working on         */
1081 /****************************************************************************/
1082 static void
1083 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1084 {
1085         int fdout = fdc->fdout;
1086         int needspecify = 0;
1087
1088         if(turnon) {
1089                 fdout &= ~FDO_FDSEL;
1090                 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1091         } else
1092                 fdout &= ~(FDO_MOEN0 << fdsu);
1093
1094         if(!turnon
1095            && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1096                 /* gonna turn off the last drive, put FDC to bed */
1097                 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1098         else {
1099                 /* make sure controller is selected and specified */
1100                 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1101                         needspecify = 1;
1102                 fdout |= (FDO_FRST|FDO_FDMAEN);
1103         }
1104
1105         fdout_wr(fdc, fdout);
1106         fdc->fdout = fdout;
1107         TRACE1("[0x%x->FDOUT]", fdout);
1108
1109         if (needspecify) {
1110                 /*
1111                  * XXX
1112                  * special case: since we have just woken up the FDC
1113                  * from its sleep, we silently assume the command will
1114                  * be accepted, and do not test for a timeout
1115                  */
1116                 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1117                              NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1118                              0);
1119                 if (fdc->flags & FDC_HAS_FIFO)
1120                         (void) enable_fifo(fdc);
1121         }
1122 }
1123
1124 static void
1125 fd_turnoff(void *xfd)
1126 {
1127         int     s;
1128         fd_p fd = xfd;
1129
1130         TRACE1("[fd%d: turnoff]", fd->fdu);
1131
1132         s = splbio();
1133         /*
1134          * Don't turn off the motor yet if the drive is active.
1135          *
1136          * If we got here, this could only mean we missed an interrupt.
1137          * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1138          * after a controller reset.  Just schedule a pseudo-interrupt
1139          * so the state machine gets re-entered.
1140          */
1141         if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1142                 fdc_intr(fd->fdc);
1143                 splx(s);
1144                 return;
1145         }
1146
1147         fd->flags &= ~FD_MOTOR;
1148         set_motor(fd->fdc, fd->fdsu, TURNOFF);
1149         splx(s);
1150 }
1151
1152 static void
1153 fd_motor_on(void *xfd)
1154 {
1155         int     s;
1156         fd_p fd = xfd;
1157
1158         s = splbio();
1159         fd->flags &= ~FD_MOTOR_WAIT;
1160         if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1161         {
1162                 fdc_intr(fd->fdc);
1163         }
1164         splx(s);
1165 }
1166
1167 static void
1168 fd_turnon(fd_p fd)
1169 {
1170         if(!(fd->flags & FD_MOTOR))
1171         {
1172                 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1173                 set_motor(fd->fdc, fd->fdsu, TURNON);
1174                 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */
1175         }
1176 }
1177
1178 static void
1179 fdc_reset(fdc_p fdc)
1180 {
1181         /* Try a reset, keep motor on */
1182         fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1183         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1184         DELAY(100);
1185         /* enable FDC, but defer interrupts a moment */
1186         fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1187         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1188         DELAY(100);
1189         fdout_wr(fdc, fdc->fdout);
1190         TRACE1("[0x%x->FDOUT]", fdc->fdout);
1191
1192         /* XXX after a reset, silently believe the FDC will accept commands */
1193         (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1194                      NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1195                      0);
1196         if (fdc->flags & FDC_HAS_FIFO)
1197                 (void) enable_fifo(fdc);
1198 }
1199
1200 /****************************************************************************/
1201 /*                             fdc in/out                                   */
1202 /****************************************************************************/
1203 /*
1204  * FDC IO functions, take care of the main status register, timeout
1205  * in case the desired status bits are never set.
1206  *
1207  * These PIO loops initially start out with short delays between
1208  * each iteration in the expectation that the required condition
1209  * is usually met quickly, so it can be handled immediately.  After
1210  * about 1 ms, stepping is increased to achieve a better timing
1211  * accuracy in the calls to DELAY().
1212  */
1213 static int
1214 fd_in(struct fdc_data *fdc, int *ptr)
1215 {
1216         int i, j, step;
1217
1218         for (j = 0, step = 1;
1219             (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1220             j < FDSTS_TIMEOUT;
1221             j += step) {
1222                 if (i == NE7_RQM)
1223                         return (fdc_err(fdc, "ready for output in input\n"));
1224                 if (j == 1000)
1225                         step = 1000;
1226                 DELAY(step);
1227         }
1228         if (j >= FDSTS_TIMEOUT)
1229                 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1230 #ifdef  FDC_DEBUG
1231         i = fddata_rd(fdc);
1232         TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1233         *ptr = i;
1234         return (0);
1235 #else   /* !FDC_DEBUG */
1236         i = fddata_rd(fdc);
1237         if (ptr)
1238                 *ptr = i;
1239         return (0);
1240 #endif  /* FDC_DEBUG */
1241 }
1242
1243 static int
1244 out_fdc(struct fdc_data *fdc, int x)
1245 {
1246         int i, j, step;
1247
1248         for (j = 0, step = 1;
1249             (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1250             j < FDSTS_TIMEOUT;
1251             j += step) {
1252                 if (i == (NE7_DIO|NE7_RQM))
1253                         return (fdc_err(fdc, "ready for input in output\n"));
1254                 if (j == 1000)
1255                         step = 1000;
1256                 DELAY(step);
1257         }
1258         if (j >= FDSTS_TIMEOUT)
1259                 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1260
1261         /* Send the command and return */
1262         fddata_wr(fdc, x);
1263         TRACE1("[0x%x->FDDATA]", x);
1264         return (0);
1265 }
1266
1267 /****************************************************************************/
1268 /*                           fdopen/fdclose                                 */
1269 /****************************************************************************/
1270 int
1271 Fdopen(dev_t dev, int flags, int mode, struct thread *td)
1272 {
1273         fdu_t fdu = FDUNIT(minor(dev));
1274         int type = FDTYPE(minor(dev));
1275         fd_p    fd;
1276         fdc_p   fdc;
1277
1278         /* check bounds */
1279         if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1280                 return (ENXIO);
1281         fdc = fd->fdc;
1282         if ((fdc == NULL) || (fd->type == NO_TYPE))
1283                 return (ENXIO);
1284         if (type > NUMDENS)
1285                 return (ENXIO);
1286         if (type == 0)
1287                 type = fd->type;
1288         else {
1289                 /*
1290                  * For each type of basic drive, make sure we are trying
1291                  * to open a type it can do,
1292                  */
1293                 if (type != fd->type) {
1294                         switch (fd->type) {
1295                         case FD_360:
1296                                 return (ENXIO);
1297                         case FD_720:
1298                                 if (   type != FD_820
1299                                     && type != FD_800
1300                                     && type != FD_640
1301                                    )
1302                                         return (ENXIO);
1303                                 break;
1304                         case FD_1200:
1305                                 switch (type) {
1306                                 case FD_1480:
1307                                         type = FD_1480in5_25;
1308                                         break;
1309                                 case FD_1440:
1310                                         type = FD_1440in5_25;
1311                                         break;
1312                                 case FD_1232:
1313                                         break;
1314                                 case FD_820:
1315                                         type = FD_820in5_25;
1316                                         break;
1317                                 case FD_800:
1318                                         type = FD_800in5_25;
1319                                         break;
1320                                 case FD_720:
1321                                         type = FD_720in5_25;
1322                                         break;
1323                                 case FD_640:
1324                                         type = FD_640in5_25;
1325                                         break;
1326                                 case FD_360:
1327                                         type = FD_360in5_25;
1328                                         break;
1329                                 default:
1330                                         return(ENXIO);
1331                                 }
1332                                 break;
1333                         case FD_1440:
1334                                 if (   type != FD_1720
1335                                     && type != FD_1480
1336                                     && type != FD_1200
1337                                     && type != FD_820
1338                                     && type != FD_800
1339                                     && type != FD_720
1340                                     && type != FD_640
1341                                     )
1342                                         return(ENXIO);
1343                                 break;
1344                         }
1345                 }
1346         }
1347         fd->ft = fd_types + type - 1;
1348         fd->flags |= FD_OPEN;
1349         /*
1350          * Clearing the DMA overrun counter at open time is a bit messy.
1351          * Since we're only managing one counter per controller, opening
1352          * the second drive could mess it up.  Anyway, if the DMA overrun
1353          * condition is really persistent, it will eventually time out
1354          * still.  OTOH, clearing it here will ensure we'll at least start
1355          * trying again after a previous (maybe even long ago) failure.
1356          * Also, this is merely a stop-gap measure only that should not
1357          * happen during normal operation, so we can tolerate it to be a
1358          * bit sloppy about this.
1359          */
1360         fdc->dma_overruns = 0;
1361
1362         return 0;
1363 }
1364
1365 int
1366 fdclose(dev_t dev, int flags, int mode, struct thread *td)
1367 {
1368         fdu_t fdu = FDUNIT(minor(dev));
1369         struct fd_data *fd;
1370
1371         fd = devclass_get_softc(fd_devclass, fdu);
1372         fd->flags &= ~FD_OPEN;
1373         fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1374
1375         return (0);
1376 }
1377
1378 /****************************************************************************/
1379 /*                               fdstrategy                                 */
1380 /****************************************************************************/
1381 void
1382 fdstrategy(struct buf *bp)
1383 {
1384         unsigned nblocks, blknum, cando;
1385         int     s;
1386         fdu_t   fdu;
1387         fdc_p   fdc;
1388         fd_p    fd;
1389         size_t  fdblk;
1390
1391         fdu = FDUNIT(minor(bp->b_dev));
1392         fd = devclass_get_softc(fd_devclass, fdu);
1393         if (fd == 0)
1394                 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1395                       (u_long)major(bp->b_dev), (u_long)minor(bp->b_dev));
1396         fdc = fd->fdc;
1397         if (fd->type == NO_TYPE) {
1398                 bp->b_error = ENXIO;
1399                 bp->b_flags |= B_ERROR;
1400                 goto bad;
1401         };
1402
1403         fdblk = 128 << (fd->ft->secsize);
1404         if (!(bp->b_flags & B_FORMAT)) {
1405                 if (bp->b_blkno < 0) {
1406                         printf(
1407                 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
1408                                fdu, (u_long)bp->b_blkno, bp->b_bcount);
1409                         bp->b_error = EINVAL;
1410                         bp->b_flags |= B_ERROR;
1411                         goto bad;
1412                 }
1413                 if ((bp->b_bcount % fdblk) != 0) {
1414                         bp->b_error = EINVAL;
1415                         bp->b_flags |= B_ERROR;
1416                         goto bad;
1417                 }
1418         }
1419
1420         /*
1421          * Set up block calculations.
1422          */
1423         if (bp->b_blkno > 20000000) {
1424                 /*
1425                  * Reject unreasonably high block number, prevent the
1426                  * multiplication below from overflowing.
1427                  */
1428                 bp->b_error = EINVAL;
1429                 bp->b_flags |= B_ERROR;
1430                 goto bad;
1431         }
1432         blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk;
1433         nblocks = fd->ft->size;
1434         bp->b_resid = 0;
1435         if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1436                 if (blknum <= nblocks) {
1437                         cando = (nblocks - blknum) * fdblk;
1438                         bp->b_resid = bp->b_bcount - cando;
1439                         if (cando == 0)
1440                                 goto bad;       /* not actually bad but EOF */
1441                 } else {
1442                         bp->b_error = EINVAL;
1443                         bp->b_flags |= B_ERROR;
1444                         goto bad;
1445                 }
1446         }
1447         bp->b_pblkno = bp->b_blkno;
1448         s = splbio();
1449         bufqdisksort(&fdc->head, bp);
1450         untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */
1451
1452         /* Tell devstat we are starting on the transaction */
1453         devstat_start_transaction(&fd->device_stats);
1454         device_busy(fd->dev);
1455
1456         fdstart(fdc);
1457         splx(s);
1458         return;
1459
1460 bad:
1461         biodone(bp);
1462 }
1463
1464 /***************************************************************\
1465 *                               fdstart                         *
1466 * We have just queued something.. if the controller is not busy *
1467 * then simulate the case where it has just finished a command   *
1468 * So that it (the interrupt routine) looks on the queue for more*
1469 * work to do and picks up what we just added.                   *
1470 * If the controller is already busy, we need do nothing, as it  *
1471 * will pick up our work when the present work completes         *
1472 \***************************************************************/
1473 static void
1474 fdstart(struct fdc_data *fdc)
1475 {
1476         int s;
1477
1478         s = splbio();
1479         if(fdc->state == DEVIDLE)
1480         {
1481                 fdc_intr(fdc);
1482         }
1483         splx(s);
1484 }
1485
1486 static void
1487 fd_iotimeout(void *xfdc)
1488 {
1489         fdc_p fdc;
1490         int s;
1491
1492         fdc = xfdc;
1493         TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1494
1495         /*
1496          * Due to IBM's brain-dead design, the FDC has a faked ready
1497          * signal, hardwired to ready == true. Thus, any command
1498          * issued if there's no diskette in the drive will _never_
1499          * complete, and must be aborted by resetting the FDC.
1500          * Many thanks, Big Blue!
1501          * The FDC must not be reset directly, since that would
1502          * interfere with the state machine.  Instead, pretend that
1503          * the command completed but was invalid.  The state machine
1504          * will reset the FDC and retry once.
1505          */
1506         s = splbio();
1507         fdc->status[0] = NE7_ST0_IC_IV;
1508         fdc->flags &= ~FDC_STAT_VALID;
1509         fdc->state = IOTIMEDOUT;
1510         fdc_intr(fdc);
1511         splx(s);
1512 }
1513
1514 /* just ensure it has the right spl */
1515 static void
1516 fd_pseudointr(void *xfdc)
1517 {
1518         int     s;
1519
1520         s = splbio();
1521         fdc_intr(xfdc);
1522         splx(s);
1523 }
1524
1525 /***********************************************************************\
1526 *                                 fdintr                                *
1527 * keep calling the state machine until it returns a 0                   *
1528 * ALWAYS called at SPLBIO                                               *
1529 \***********************************************************************/
1530 static void
1531 fdc_intr(void *xfdc)
1532 {
1533         fdc_p fdc = xfdc;
1534         while(fdstate(fdc))
1535                 ;
1536 }
1537
1538 /*
1539  * magic pseudo-DMA initialization for YE FDC. Sets count and
1540  * direction
1541  */
1542 #define SET_BCDR(fdc,wr,cnt,port) \
1543         bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port,  \
1544             ((cnt)-1) & 0xff);                                           \
1545         bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1546             ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1547
1548 /*
1549  * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1550  */
1551 static int fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count)
1552 {
1553         u_char *cptr = (u_char *)addr;
1554
1555         if (flags & B_READ) {
1556                 if (fdc->state != PIOREAD) {
1557                         fdc->state = PIOREAD;
1558                         return(0);
1559                 };
1560                 SET_BCDR(fdc, 0, count, 0);
1561                 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1562                     FDC_YE_DATAPORT, cptr, count);
1563         } else {
1564                 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1565                     FDC_YE_DATAPORT, cptr, count);
1566                 SET_BCDR(fdc, 0, count, 0);
1567         };
1568         return(1);
1569 }
1570
1571 /***********************************************************************\
1572 * The controller state machine.                                         *
1573 * if it returns a non zero value, it should be called again immediatly  *
1574 \***********************************************************************/
1575 static int
1576 fdstate(fdc_p fdc)
1577 {
1578         int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1579         unsigned blknum = 0, b_cylinder = 0;
1580         fdu_t fdu = fdc->fdu;
1581         fd_p fd;
1582         struct buf *bp;
1583         struct fd_formb *finfo = NULL;
1584         size_t fdblk;
1585
1586         bp = fdc->bp;
1587         if (bp == NULL) {
1588                 bp = bufq_first(&fdc->head);
1589                 if (bp != NULL) {
1590                         bufq_remove(&fdc->head, bp);
1591                         fdc->bp = bp;
1592                 }
1593         }
1594         if (bp == NULL) {
1595                 /***********************************************\
1596                 * nothing left for this controller to do        *
1597                 * Force into the IDLE state,                    *
1598                 \***********************************************/
1599                 fdc->state = DEVIDLE;
1600                 if (fdc->fd) {
1601                         device_printf(fdc->fdc_dev,
1602                             "unexpected valid fd pointer\n");
1603                         fdc->fd = (fd_p) 0;
1604                         fdc->fdu = -1;
1605                 }
1606                 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1607                 return (0);
1608         }
1609         fdu = FDUNIT(minor(bp->b_dev));
1610         fd = devclass_get_softc(fd_devclass, fdu);
1611         fdblk = 128 << fd->ft->secsize;
1612         if (fdc->fd && (fd != fdc->fd))
1613                 device_printf(fd->dev, "confused fd pointers\n");
1614         read = bp->b_flags & B_READ;
1615         format = bp->b_flags & B_FORMAT;
1616         if (format) {
1617                 finfo = (struct fd_formb *)bp->b_data;
1618                 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1619                         - (char *)finfo;
1620         }
1621         if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1622                 blknum = (unsigned) bp->b_pblkno * DEV_BSIZE/fdblk +
1623                         fd->skip/fdblk;
1624                 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1625         }
1626         TRACE1("fd%d", fdu);
1627         TRACE1("[%s]", fdstates[fdc->state]);
1628         TRACE1("(0x%x)", fd->flags);
1629         untimeout(fd_turnoff, fd, fd->toffhandle);
1630         fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz);
1631         switch (fdc->state)
1632         {
1633         case DEVIDLE:
1634         case FINDWORK:  /* we have found new work */
1635                 fdc->retry = 0;
1636                 fd->skip = 0;
1637                 fdc->fd = fd;
1638                 fdc->fdu = fdu;
1639                 fdc->fdctl_wr(fdc, fd->ft->trans);
1640                 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1641                 /*******************************************************\
1642                 * If the next drive has a motor startup pending, then   *
1643                 * it will start up in its own good time         *
1644                 \*******************************************************/
1645                 if(fd->flags & FD_MOTOR_WAIT) {
1646                         fdc->state = MOTORWAIT;
1647                         return (0); /* come back later */
1648                 }
1649                 /*******************************************************\
1650                 * Maybe if it's not starting, it SHOULD be starting     *
1651                 \*******************************************************/
1652                 if (!(fd->flags & FD_MOTOR))
1653                 {
1654                         fdc->state = MOTORWAIT;
1655                         fd_turnon(fd);
1656                         return (0);
1657                 }
1658                 else    /* at least make sure we are selected */
1659                 {
1660                         set_motor(fdc, fd->fdsu, TURNON);
1661                 }
1662                 if (fdc->flags & FDC_NEEDS_RESET) {
1663                         fdc->state = RESETCTLR;
1664                         fdc->flags &= ~FDC_NEEDS_RESET;
1665                 } else
1666                         fdc->state = DOSEEK;
1667                 break;
1668         case DOSEEK:
1669                 if (b_cylinder == (unsigned)fd->track)
1670                 {
1671                         fdc->state = SEEKCOMPLETE;
1672                         break;
1673                 }
1674                 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1675                            fd->fdsu, b_cylinder * fd->ft->steptrac,
1676                            0))
1677                 {
1678                         /*
1679                          * seek command not accepted, looks like
1680                          * the FDC went off to the Saints...
1681                          */
1682                         fdc->retry = 6; /* try a reset */
1683                         return(retrier(fdc));
1684                 }
1685                 fd->track = FD_NO_TRACK;
1686                 fdc->state = SEEKWAIT;
1687                 return(0);      /* will return later */
1688         case SEEKWAIT:
1689                 /* allow heads to settle */
1690                 timeout(fd_pseudointr, fdc, hz / 16);
1691                 fdc->state = SEEKCOMPLETE;
1692                 return(0);      /* will return later */
1693         case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1694                 /* Make sure seek really happened*/
1695                 if(fd->track == FD_NO_TRACK) {
1696                         int descyl = b_cylinder * fd->ft->steptrac;
1697                         do {
1698                                 /*
1699                                  * This might be a "ready changed" interrupt,
1700                                  * which cannot really happen since the
1701                                  * RDY pin is hardwired to + 5 volts.  This
1702                                  * generally indicates a "bouncing" intr
1703                                  * line, so do one of the following:
1704                                  *
1705                                  * When running on an enhanced FDC that is
1706                                  * known to not go stuck after responding
1707                                  * with INVALID, fetch all interrupt states
1708                                  * until seeing either an INVALID or a
1709                                  * real interrupt condition.
1710                                  *
1711                                  * When running on a dumb old NE765, give
1712                                  * up immediately.  The controller will
1713                                  * provide up to four dummy RC interrupt
1714                                  * conditions right after reset (for the
1715                                  * corresponding four drives), so this is
1716                                  * our only chance to get notice that it
1717                                  * was not the FDC that caused the interrupt.
1718                                  */
1719                                 if (fd_sense_int(fdc, &st0, &cyl)
1720                                     == FD_NOT_VALID)
1721                                         return 0;
1722                                 if(fdc->fdct == FDC_NE765
1723                                    && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1724                                         return 0; /* hope for a real intr */
1725                         } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1726
1727                         if (0 == descyl) {
1728                                 int failed = 0;
1729                                 /*
1730                                  * seek to cyl 0 requested; make sure we are
1731                                  * really there
1732                                  */
1733                                 if (fd_sense_drive_status(fdc, &st3))
1734                                         failed = 1;
1735                                 if ((st3 & NE7_ST3_T0) == 0) {
1736                                         printf(
1737                 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1738                                                fdu, st3, NE7_ST3BITS);
1739                                         failed = 1;
1740                                 }
1741
1742                                 if (failed) {
1743                                         if(fdc->retry < 3)
1744                                                 fdc->retry = 3;
1745                                         return (retrier(fdc));
1746                                 }
1747                         }
1748
1749                         if (cyl != descyl) {
1750                                 printf(
1751                 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1752                                        fdu, descyl, cyl, st0);
1753                                 if (fdc->retry < 3)
1754                                         fdc->retry = 3;
1755                                 return (retrier(fdc));
1756                         }
1757                 }
1758
1759                 fd->track = b_cylinder;
1760                 if (!(fdc->flags & FDC_NODMA))
1761                         isa_dmastart(bp->b_flags, bp->b_data+fd->skip,
1762                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
1763                 sectrac = fd->ft->sectrac;
1764                 sec = blknum %  (sectrac * fd->ft->heads);
1765                 head = sec / sectrac;
1766                 sec = sec % sectrac + 1;
1767                 fd->hddrv = ((head&1)<<2)+fdu;
1768
1769                 if(format || !read)
1770                 {
1771                         /* make sure the drive is writable */
1772                         if(fd_sense_drive_status(fdc, &st3) != 0)
1773                         {
1774                                 /* stuck controller? */
1775                                 if (!(fdc->flags & FDC_NODMA))
1776                                         isa_dmadone(bp->b_flags,
1777                                                     bp->b_data + fd->skip,
1778                                                     format ? bp->b_bcount : fdblk,
1779                                                     fdc->dmachan);
1780                                 fdc->retry = 6; /* reset the beast */
1781                                 return (retrier(fdc));
1782                         }
1783                         if(st3 & NE7_ST3_WP)
1784                         {
1785                                 /*
1786                                  * XXX YES! this is ugly.
1787                                  * in order to force the current operation
1788                                  * to fail, we will have to fake an FDC
1789                                  * error - all error handling is done
1790                                  * by the retrier()
1791                                  */
1792                                 fdc->status[0] = NE7_ST0_IC_AT;
1793                                 fdc->status[1] = NE7_ST1_NW;
1794                                 fdc->status[2] = 0;
1795                                 fdc->status[3] = fd->track;
1796                                 fdc->status[4] = head;
1797                                 fdc->status[5] = sec;
1798                                 fdc->retry = 8; /* break out immediately */
1799                                 fdc->state = IOTIMEDOUT; /* not really... */
1800                                 return (1);
1801                         }
1802                 }
1803
1804                 if (format) {
1805                         if (fdc->flags & FDC_NODMA) {
1806                                 /*
1807                                  * This seems to be necessary for
1808                                  * whatever obscure reason; if we omit
1809                                  * it, we end up filling the sector ID
1810                                  * fields of the newly formatted track
1811                                  * entirely with garbage, causing
1812                                  * `wrong cylinder' errors all over
1813                                  * the place when trying to read them
1814                                  * back.
1815                                  *
1816                                  * Umpf.
1817                                  */
1818                                 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1819
1820                                 (void)fdcpio(fdc,bp->b_flags,
1821                                         bp->b_data+fd->skip,
1822                                         bp->b_bcount);
1823
1824                         }
1825                         /* formatting */
1826                         if(fd_cmd(fdc, 6,  NE7CMD_FORMAT, head << 2 | fdu,
1827                                   finfo->fd_formb_secshift,
1828                                   finfo->fd_formb_nsecs,
1829                                   finfo->fd_formb_gaplen,
1830                                   finfo->fd_formb_fillbyte, 0)) {
1831                                 /* controller fell over */
1832                                 if (!(fdc->flags & FDC_NODMA))
1833                                         isa_dmadone(bp->b_flags,
1834                                                     bp->b_data + fd->skip,
1835                                                     format ? bp->b_bcount : fdblk,
1836                                                     fdc->dmachan);
1837                                 fdc->retry = 6;
1838                                 return (retrier(fdc));
1839                         }
1840                 } else {
1841                         if (fdc->flags & FDC_NODMA) {
1842                                 /*
1843                                  * this seems to be necessary even when
1844                                  * reading data
1845                                  */
1846                                 SET_BCDR(fdc, 1, fdblk, 0);
1847
1848                                 /*
1849                                  * perform the write pseudo-DMA before
1850                                  * the WRITE command is sent
1851                                  */
1852                                 if (!read)
1853                                         (void)fdcpio(fdc,bp->b_flags,
1854                                             bp->b_data+fd->skip,
1855                                             fdblk);
1856                         }
1857                         if (fd_cmd(fdc, 9,
1858                                    (read ? NE7CMD_READ : NE7CMD_WRITE),
1859                                    head << 2 | fdu,  /* head & unit */
1860                                    fd->track,        /* track */
1861                                    head,
1862                                    sec,              /* sector + 1 */
1863                                    fd->ft->secsize,  /* sector size */
1864                                    sectrac,          /* sectors/track */
1865                                    fd->ft->gap,      /* gap size */
1866                                    fd->ft->datalen,  /* data length */
1867                                    0)) {
1868                                 /* the beast is sleeping again */
1869                                 if (!(fdc->flags & FDC_NODMA))
1870                                         isa_dmadone(bp->b_flags,
1871                                                     bp->b_data + fd->skip,
1872                                                     format ? bp->b_bcount : fdblk,
1873                                                     fdc->dmachan);
1874                                 fdc->retry = 6;
1875                                 return (retrier(fdc));
1876                         }
1877                 }
1878                 if (fdc->flags & FDC_NODMA)
1879                         /*
1880                          * if this is a read, then simply await interrupt
1881                          * before performing PIO
1882                          */
1883                         if (read && !fdcpio(fdc,bp->b_flags,
1884                             bp->b_data+fd->skip,fdblk)) {
1885                                 fd->tohandle = timeout(fd_iotimeout, fdc, hz);
1886                                 return(0);      /* will return later */
1887                         };
1888
1889                 /*
1890                  * write (or format) operation will fall through and
1891                  * await completion interrupt
1892                  */
1893                 fdc->state = IOCOMPLETE;
1894                 fd->tohandle = timeout(fd_iotimeout, fdc, hz);
1895                 return (0);     /* will return later */
1896         case PIOREAD:
1897                 /* 
1898                  * actually perform the PIO read.  The IOCOMPLETE case
1899                  * removes the timeout for us.  
1900                  */
1901                 (void)fdcpio(fdc,bp->b_flags,bp->b_data+fd->skip,fdblk);
1902                 fdc->state = IOCOMPLETE;
1903                 /* FALLTHROUGH */
1904         case IOCOMPLETE: /* IO DONE, post-analyze */
1905                 untimeout(fd_iotimeout, fdc, fd->tohandle);
1906
1907                 if (fd_read_status(fdc, fd->fdsu)) {
1908                         if (!(fdc->flags & FDC_NODMA))
1909                                 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1910                                             format ? bp->b_bcount : fdblk,
1911                                             fdc->dmachan);
1912                         if (fdc->retry < 6)
1913                                 fdc->retry = 6; /* force a reset */
1914                         return (retrier(fdc));
1915                 }
1916
1917                 fdc->state = IOTIMEDOUT;
1918
1919                 /* FALLTHROUGH */
1920
1921         case IOTIMEDOUT:
1922                 if (!(fdc->flags & FDC_NODMA))
1923                         isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1924                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
1925                 if (fdc->status[0] & NE7_ST0_IC) {
1926                         if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1927                             && fdc->status[1] & NE7_ST1_OR) {
1928                                 /*
1929                                  * DMA overrun. Someone hogged the bus and
1930                                  * didn't release it in time for the next
1931                                  * FDC transfer.
1932                                  *
1933                                  * We normally restart this without bumping
1934                                  * the retry counter.  However, in case
1935                                  * something is seriously messed up (like
1936                                  * broken hardware), we rather limit the
1937                                  * number of retries so the IO operation
1938                                  * doesn't block indefinately.
1939                                  */
1940                                 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
1941                                         fdc->state = SEEKCOMPLETE;
1942                                         return (1);
1943                                 } /* else fall through */
1944                         }
1945                         if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
1946                                 && fdc->retry < 6)
1947                                 fdc->retry = 6; /* force a reset */
1948                         else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1949                                 && fdc->status[2] & NE7_ST2_WC
1950                                 && fdc->retry < 3)
1951                                 fdc->retry = 3; /* force recalibrate */
1952                         return (retrier(fdc));
1953                 }
1954                 /* All OK */
1955                 /* Operation successful, retry DMA overruns again next time. */
1956                 fdc->dma_overruns = 0;
1957                 fd->skip += fdblk;
1958                 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
1959                         /* set up next transfer */
1960                         fdc->state = DOSEEK;
1961                 } else {
1962                         /* ALL DONE */
1963                         fd->skip = 0;
1964                         fdc->bp = NULL;
1965                         device_unbusy(fd->dev);
1966                         devstat_end_transaction_buf(&fd->device_stats, bp);
1967                         biodone(bp);
1968                         fdc->fd = (fd_p) 0;
1969                         fdc->fdu = -1;
1970                         fdc->state = FINDWORK;
1971                 }
1972                 return (1);
1973         case RESETCTLR:
1974                 fdc_reset(fdc);
1975                 fdc->retry++;
1976                 fdc->state = RESETCOMPLETE;
1977                 return (0);
1978         case RESETCOMPLETE:
1979                 /*
1980                  * Discard all the results from the reset so that they
1981                  * can't cause an unexpected interrupt later.
1982                  */
1983                 for (i = 0; i < 4; i++)
1984                         (void)fd_sense_int(fdc, &st0, &cyl);
1985                 fdc->state = STARTRECAL;
1986                 /* Fall through. */
1987         case STARTRECAL:
1988                 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
1989                         /* arrgl */
1990                         fdc->retry = 6;
1991                         return (retrier(fdc));
1992                 }
1993                 fdc->state = RECALWAIT;
1994                 return (0);     /* will return later */
1995         case RECALWAIT:
1996                 /* allow heads to settle */
1997                 timeout(fd_pseudointr, fdc, hz / 8);
1998                 fdc->state = RECALCOMPLETE;
1999                 return (0);     /* will return later */
2000         case RECALCOMPLETE:
2001                 do {
2002                         /*
2003                          * See SEEKCOMPLETE for a comment on this:
2004                          */
2005                         if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2006                                 return 0;
2007                         if(fdc->fdct == FDC_NE765
2008                            && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2009                                 return 0; /* hope for a real intr */
2010                 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2011                 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2012                 {
2013                         if(fdc->retry > 3)
2014                                 /*
2015                                  * a recalibrate from beyond cylinder 77
2016                                  * will "fail" due to the FDC limitations;
2017                                  * since people used to complain much about
2018                                  * the failure message, try not logging
2019                                  * this one if it seems to be the first
2020                                  * time in a line
2021                                  */
2022                                 printf("fd%d: recal failed ST0 %b cyl %d\n",
2023                                        fdu, st0, NE7_ST0BITS, cyl);
2024                         if(fdc->retry < 3) fdc->retry = 3;
2025                         return (retrier(fdc));
2026                 }
2027                 fd->track = 0;
2028                 /* Seek (probably) necessary */
2029                 fdc->state = DOSEEK;
2030                 return (1);     /* will return immediatly */
2031         case MOTORWAIT:
2032                 if(fd->flags & FD_MOTOR_WAIT)
2033                 {
2034                         return (0); /* time's not up yet */
2035                 }
2036                 if (fdc->flags & FDC_NEEDS_RESET) {
2037                         fdc->state = RESETCTLR;
2038                         fdc->flags &= ~FDC_NEEDS_RESET;
2039                 } else {
2040                         /*
2041                          * If all motors were off, then the controller was
2042                          * reset, so it has lost track of the current
2043                          * cylinder.  Recalibrate to handle this case.
2044                          * But first, discard the results of the reset.
2045                          */
2046                         fdc->state = RESETCOMPLETE;
2047                 }
2048                 return (1);     /* will return immediatly */
2049         default:
2050                 device_printf(fdc->fdc_dev, "unexpected FD int->");
2051                 if (fd_read_status(fdc, fd->fdsu) == 0)
2052                         printf("FDC status :%x %x %x %x %x %x %x   ",
2053                                fdc->status[0],
2054                                fdc->status[1],
2055                                fdc->status[2],
2056                                fdc->status[3],
2057                                fdc->status[4],
2058                                fdc->status[5],
2059                                fdc->status[6] );
2060                 else
2061                         printf("No status available   ");
2062                 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2063                 {
2064                         printf("[controller is dead now]\n");
2065                         return (0);
2066                 }
2067                 printf("ST0 = %x, PCN = %x\n", st0, cyl);
2068                 return (0);
2069         }
2070         /*XXX confusing: some branches return immediately, others end up here*/
2071         return (1); /* Come back immediatly to new state */
2072 }
2073
2074 static int
2075 retrier(struct fdc_data *fdc)
2076 {
2077         struct buf *bp;
2078         struct fd_data *fd;
2079         int fdu;
2080
2081         bp = fdc->bp;
2082
2083         /* XXX shouldn't this be cached somewhere?  */
2084         fdu = FDUNIT(minor(bp->b_dev));
2085         fd = devclass_get_softc(fd_devclass, fdu);
2086         if (fd->options & FDOPT_NORETRY)
2087                 goto fail;
2088
2089         switch (fdc->retry) {
2090         case 0: case 1: case 2:
2091                 fdc->state = SEEKCOMPLETE;
2092                 break;
2093         case 3: case 4: case 5:
2094                 fdc->state = STARTRECAL;
2095                 break;
2096         case 6:
2097                 fdc->state = RESETCTLR;
2098                 break;
2099         case 7:
2100                 break;
2101         default:
2102         fail:
2103                 {
2104                         int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2105                         dev_t sav_b_dev = bp->b_dev;
2106
2107                         /* Trick diskerr */
2108                         bp->b_dev = makedev(major(bp->b_dev),
2109                                     (FDUNIT(minor(bp->b_dev))<<3)|RAW_PART);
2110                         if (printerror)
2111                                 diskerr(bp, "hard error", LOG_PRINTF,
2112                                         fdc->fd->skip / DEV_BSIZE,
2113                                         (struct disklabel *)NULL);
2114                         bp->b_dev = sav_b_dev;
2115                         if (printerror) {
2116                                 if (fdc->flags & FDC_STAT_VALID)
2117                                         printf(
2118                         " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2119                                                fdc->status[0], NE7_ST0BITS,
2120                                                fdc->status[1], NE7_ST1BITS,
2121                                                fdc->status[2], NE7_ST2BITS,
2122                                                fdc->status[3], fdc->status[4],
2123                                                fdc->status[5]);
2124                                 else
2125                                         printf(" (No status)\n");
2126                         }
2127                 }
2128                 bp->b_flags |= B_ERROR;
2129                 bp->b_error = EIO;
2130                 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2131                 fdc->bp = NULL;
2132                 fdc->fd->skip = 0;
2133                 device_unbusy(fd->dev);
2134                 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2135                 biodone(bp);
2136                 fdc->state = FINDWORK;
2137                 fdc->flags |= FDC_NEEDS_RESET;
2138                 fdc->fd = (fd_p) 0;
2139                 fdc->fdu = -1;
2140                 return (1);
2141         }
2142         fdc->retry++;
2143         return (1);
2144 }
2145
2146 static int
2147 fdformat(dev_t dev, struct fd_formb *finfo, struct thread *td)
2148 {
2149         struct proc *p = td->td_proc;
2150         fdu_t   fdu;
2151         fd_p    fd;
2152
2153         struct buf *bp;
2154         int rv = 0, s;
2155         size_t fdblk;
2156
2157         fdu     = FDUNIT(minor(dev));
2158         fd      = devclass_get_softc(fd_devclass, fdu);
2159         fdblk = 128 << fd->ft->secsize;
2160
2161         /* set up a buffer header for fdstrategy() */
2162         bp = malloc(sizeof(struct buf), M_TEMP, M_WAITOK | M_ZERO);
2163
2164         /*
2165          * keep the process from being swapped
2166          */
2167         PHOLD(p);
2168         BUF_LOCKINIT(bp);
2169         BUF_LOCK(bp, LK_EXCLUSIVE);
2170         bp->b_flags = B_PHYS | B_FORMAT;
2171
2172         /*
2173          * calculate a fake blkno, so fdstrategy() would initiate a
2174          * seek to the requested cylinder
2175          */
2176         bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
2177                 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
2178
2179         bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2180         bp->b_data = (caddr_t)finfo;
2181
2182         /* now do the format */
2183         bp->b_dev = dev;
2184         BUF_STRATEGY(bp, 0);
2185
2186         /* ...and wait for it to complete */
2187         s = splbio();
2188         while(!(bp->b_flags & B_DONE)) {
2189                 rv = tsleep((caddr_t)bp, 0, "fdform", 20 * hz);
2190                 if (rv == EWOULDBLOCK)
2191                         break;
2192         }
2193         splx(s);
2194
2195         if (rv == EWOULDBLOCK) {
2196                 /* timed out */
2197                 rv = EIO;
2198                 device_unbusy(fd->dev);
2199                 biodone(bp);
2200         }
2201         if (bp->b_flags & B_ERROR)
2202                 rv = bp->b_error;
2203         /*
2204          * allow the process to be swapped
2205          */
2206         PRELE(p);
2207         BUF_UNLOCK(bp);
2208         BUF_LOCKFREE(bp);
2209         free(bp, M_TEMP);
2210         return rv;
2211 }
2212
2213 /*
2214  * TODO: don't allocate buffer on stack.
2215  */
2216
2217 static int
2218 fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
2219 {
2220         fdu_t   fdu = FDUNIT(minor(dev));
2221         fd_p    fd = devclass_get_softc(fd_devclass, fdu);
2222         size_t fdblk;
2223
2224         struct fd_type *fdt;
2225         struct disklabel *dl;
2226         struct fdc_status *fsp;
2227         char buffer[DEV_BSIZE];
2228         int error = 0;
2229
2230         fdblk = 128 << fd->ft->secsize;
2231
2232         switch (cmd) {
2233         case DIOCGDINFO:
2234                 bzero(buffer, sizeof (buffer));
2235                 dl = (struct disklabel *)buffer;
2236                 dl->d_secsize = fdblk;
2237                 fdt = fd->ft;
2238                 dl->d_secpercyl = fdt->size / fdt->tracks;
2239                 dl->d_type = DTYPE_FLOPPY;
2240
2241                 if (readdisklabel(dev, dl)
2242                     == NULL)
2243                         error = 0;
2244                 else
2245                         error = EINVAL;
2246
2247                 *(struct disklabel *)addr = *dl;
2248                 break;
2249
2250         case DIOCSDINFO:
2251                 if ((flag & FWRITE) == 0)
2252                         error = EBADF;
2253                 break;
2254
2255         case DIOCWLABEL:
2256                 if ((flag & FWRITE) == 0)
2257                         error = EBADF;
2258                 break;
2259
2260         case DIOCWDINFO:
2261                 if ((flag & FWRITE) == 0) {
2262                         error = EBADF;
2263                         break;
2264                 }
2265
2266                 dl = (struct disklabel *)addr;
2267
2268                 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2269                                           (u_long)0)) != 0)
2270                         break;
2271
2272                 error = writedisklabel(dev, (struct disklabel *)buffer);
2273                 break;
2274         case FD_FORM:
2275                 if ((flag & FWRITE) == 0)
2276                         error = EBADF;  /* must be opened for writing */
2277                 else if (((struct fd_formb *)addr)->format_version !=
2278                         FD_FORMAT_VERSION)
2279                         error = EINVAL; /* wrong version of formatting prog */
2280                 else
2281                         error = fdformat(dev, (struct fd_formb *)addr, td);
2282                 break;
2283
2284         case FD_GTYPE:                  /* get drive type */
2285                 *(struct fd_type *)addr = *fd->ft;
2286                 break;
2287
2288         case FD_STYPE:                  /* set drive type */
2289                 /* this is considered harmful; only allow for superuser */
2290                 if (suser(td) != 0)
2291                         return EPERM;
2292                 *fd->ft = *(struct fd_type *)addr;
2293                 break;
2294
2295         case FD_GOPTS:                  /* get drive options */
2296                 *(int *)addr = fd->options;
2297                 break;
2298
2299         case FD_SOPTS:                  /* set drive options */
2300                 fd->options = *(int *)addr;
2301                 break;
2302
2303         case FD_GSTAT:
2304                 fsp = (struct fdc_status *)addr;
2305                 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2306                         return EINVAL;
2307                 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2308                 break;
2309
2310         default:
2311                 error = ENOTTY;
2312                 break;
2313         }
2314         return (error);
2315 }
2316
2317 /*
2318  * Hello emacs, these are the
2319  * Local Variables:
2320  *  c-indent-level:               8
2321  *  c-continued-statement-offset: 8
2322  *  c-continued-brace-offset:     0
2323  *  c-brace-offset:              -8
2324  *  c-brace-imaginary-offset:     0
2325  *  c-argdecl-indent:             8
2326  *  c-label-offset:              -8
2327  *  c++-hanging-braces:           1
2328  *  c++-access-specifier-offset: -8
2329  *  c++-empty-arglist-indent:     8
2330  *  c++-friend-offset:            0
2331  * End:
2332  */