kernel: Remove two more major numbers.
[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  *
55  */
56
57 #include "opt_fdc.h"
58
59 #include <sys/param.h>
60 #include <sys/systm.h>
61 #include <sys/bootmaj.h>
62 #include <sys/kernel.h>
63 #include <sys/buf.h>
64 #include <sys/bus.h>
65 #include <sys/conf.h>
66 #include <sys/diskslice.h>
67 #include <sys/disk.h>
68 #include <sys/devicestat.h>
69 #include <sys/fcntl.h>
70 #include <sys/malloc.h>
71 #include <sys/module.h>
72 #include <sys/proc.h>
73 #include <sys/priv.h>
74 #include <sys/syslog.h>
75 #include <sys/device.h>
76 #include <sys/bus.h>
77 #include <sys/rman.h>
78 #include <sys/buf2.h>
79 #include <sys/thread2.h>
80
81 #include <machine/clock.h>
82 #include <machine/inttypes.h>
83 #include <machine/ioctl_fd.h>
84 #include <machine/stdarg.h>
85
86 #include <bus/isa/isavar.h>
87 #include <bus/isa/isareg.h>
88 #include "fdreg.h"
89 #include "fdc.h"
90 #include <bus/isa/rtc.h>
91
92 /* configuration flags */
93 #define FDC_PRETEND_D0  (1 << 0)        /* pretend drive 0 to be there */
94 #define FDC_NO_FIFO     (1 << 2)        /* do not enable FIFO  */
95
96 /* internally used only, not really from CMOS: */
97 #define RTCFDT_144M_PRETENDED   0x1000
98
99 /* error returns for fd_cmd() */
100 #define FD_FAILED -1
101 #define FD_NOT_VALID -2
102 #define FDC_ERRMAX      100     /* do not log more */
103 /*
104  * Stop retrying after this many DMA overruns.  Since each retry takes
105  * one revolution, with 300 rpm., 25 retries take approximately 10
106  * seconds which the read attempt will block in case the DMA overrun
107  * is persistent.
108  */
109 #define FDC_DMAOV_MAX   25
110
111 /*
112  * Timeout value for the PIO loops to wait until the FDC main status
113  * register matches our expectations (request for master, direction
114  * bit).  This is supposed to be a number of microseconds, although
115  * timing might actually not be very accurate.
116  *
117  * Timeouts of 100 msec are believed to be required for some broken
118  * (old) hardware.
119  */
120 #define FDSTS_TIMEOUT   100000
121
122 #define NUMTYPES 17
123 #define NUMDENS  (NUMTYPES - 7)
124
125 /* These defines (-1) must match index for fd_types */
126 #define F_TAPE_TYPE     0x020   /* bit for fd_types to indicate tape */
127 #define NO_TYPE         0       /* must match NO_TYPE in ft.c */
128 #define FD_1720         1
129 #define FD_1480         2
130 #define FD_1440         3
131 #define FD_1200         4
132 #define FD_820          5
133 #define FD_800          6
134 #define FD_720          7
135 #define FD_360          8
136 #define FD_640          9
137 #define FD_1232         10
138
139 #define FD_1480in5_25   11
140 #define FD_1440in5_25   12
141 #define FD_820in5_25    13
142 #define FD_800in5_25    14
143 #define FD_720in5_25    15
144 #define FD_360in5_25    16
145 #define FD_640in5_25    17
146
147
148 static struct fd_type fd_types[NUMTYPES] =
149 {
150 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
151 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
152 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
153 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /*  1.2M in HD 5.25/3.5 */
154 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /*  820K in HD 3.5in */
155 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /*  800K in HD 3.5in */
156 {  9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /*  720K in HD 3.5in */
157 {  9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /*  360K in DD 5.25in */
158 {  8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /*  640K in DD 5.25in */
159 {  8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
160
161 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
162 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
163 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /*  820K in HD 5.25in */
164 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /*  800K in HD 5.25in */
165 {  9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /*  720K in HD 5.25in */
166 {  9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /*  360K in HD 5.25in */
167 {  8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /*  640K in HD 5.25in */
168 };
169
170 #define DRVS_PER_CTLR 2         /* 2 floppies */
171
172 /***********************************************************************\
173 * Per controller structure.                                             *
174 \***********************************************************************/
175 devclass_t fdc_devclass;
176
177 /***********************************************************************\
178 * Per drive structure.                                                  *
179 * N per controller  (DRVS_PER_CTLR)                                     *
180 \***********************************************************************/
181 struct fd_data {
182         struct  fdc_data *fdc;  /* pointer to controller structure */
183         int     fdsu;           /* this units number on this controller */
184         int     type;           /* Drive type (FD_1440...) */
185         struct  fd_type ft;     /* the type descriptor */
186         int     flags;
187 #define FD_OPEN         0x01    /* it's open            */
188 #define FD_ACTIVE       0x02    /* it's active          */
189 #define FD_MOTOR        0x04    /* motor should be on   */
190 #define FD_MOTOR_WAIT   0x08    /* motor coming up      */
191         int     skip;
192         int     hddrv;
193 #define FD_NO_TRACK -2
194         int     track;          /* where we think the head is */
195         int     options;        /* user configurable options, see ioctl_fd.h */
196         struct  callout toffhandle;
197         struct  callout tohandle;
198         struct  callout motor;
199         struct  disk disk;
200         struct  devstat device_stats;
201         device_t dev;
202         fdu_t   fdu;
203 };
204
205 struct fdc_ivars {
206         int     fdunit;
207 };
208 static devclass_t fd_devclass;
209
210 /***********************************************************************\
211 * Throughout this file the following conventions will be used:          *
212 * fd is a pointer to the fd_data struct for the drive in question       *
213 * fdc is a pointer to the fdc_data struct for the controller            *
214 * fdu is the floppy drive unit number                                   *
215 * fdcu is the floppy controller unit number                             *
216 * fdsu is the floppy drive unit number on that controller. (sub-unit)   *
217 \***********************************************************************/
218
219 /* internal functions */
220 static  void fdc_intr(void *);
221 static void set_motor(struct fdc_data *, int, int);
222 #  define TURNON 1
223 #  define TURNOFF 0
224 static timeout_t fd_turnoff;
225 static timeout_t fd_motor_on;
226 static void fd_turnon(struct fd_data *);
227 static void fdc_reset(fdc_p);
228 static int fd_in(struct fdc_data *, int *);
229 static int out_fdc(struct fdc_data *, int);
230 static void fdstart(struct fdc_data *);
231 static timeout_t fd_iotimeout;
232 static timeout_t fd_pseudointr;
233 static int fdstate(struct fdc_data *);
234 static int retrier(struct fdc_data *);
235 static int fdformat(cdev_t, struct fd_formb *, struct ucred *);
236
237 static int enable_fifo(fdc_p fdc);
238
239 static int fifo_threshold = 8;  /* XXX: should be accessible via sysctl */
240
241
242 #define DEVIDLE         0
243 #define FINDWORK        1
244 #define DOSEEK          2
245 #define SEEKCOMPLETE    3
246 #define IOCOMPLETE      4
247 #define RECALCOMPLETE   5
248 #define STARTRECAL      6
249 #define RESETCTLR       7
250 #define SEEKWAIT        8
251 #define RECALWAIT       9
252 #define MOTORWAIT       10
253 #define IOTIMEDOUT      11
254 #define RESETCOMPLETE   12
255 #define PIOREAD         13
256
257 #ifdef  FDC_DEBUG
258 static char const * const fdstates[] =
259 {
260 "DEVIDLE",
261 "FINDWORK",
262 "DOSEEK",
263 "SEEKCOMPLETE",
264 "IOCOMPLETE",
265 "RECALCOMPLETE",
266 "STARTRECAL",
267 "RESETCTLR",
268 "SEEKWAIT",
269 "RECALWAIT",
270 "MOTORWAIT",
271 "IOTIMEDOUT",
272 "RESETCOMPLETE",
273 "PIOREAD",
274 };
275
276 /* CAUTION: fd_debug causes huge amounts of logging output */
277 static int volatile fd_debug = 0;
278 #define TRACE0(arg) if(fd_debug) kprintf(arg)
279 #define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2)
280 #else /* FDC_DEBUG */
281 #define TRACE0(arg)
282 #define TRACE1(arg1, arg2)
283 #endif /* FDC_DEBUG */
284
285 void
286 fdout_wr(fdc_p fdc, u_int8_t v)
287 {
288         bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
289 }
290
291 static u_int8_t
292 fdsts_rd(fdc_p fdc)
293 {
294         return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
295 }
296
297 static void
298 fddata_wr(fdc_p fdc, u_int8_t v)
299 {
300         bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
301 }
302
303 static u_int8_t
304 fddata_rd(fdc_p fdc)
305 {
306         return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
307 }
308
309 static void
310 fdctl_wr_isa(fdc_p fdc, u_int8_t v)
311 {
312         bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
313 }
314
315 #if 0
316
317 static u_int8_t
318 fdin_rd(fdc_p fdc)
319 {
320         return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
321 }
322
323 #endif
324
325 static  d_open_t        Fdopen; /* NOTE, not fdopen */
326 static  d_close_t       fdclose;
327 static  d_ioctl_t       fdioctl;
328 static  d_strategy_t    fdstrategy;
329
330 static struct dev_ops fd_ops = {
331         { "fd", 0, D_DISK },
332         .d_open =       Fdopen,
333         .d_close =      fdclose,
334         .d_read =       physread,
335         .d_write =      physwrite,
336         .d_ioctl =      fdioctl,
337         .d_strategy =   fdstrategy,
338 };
339
340 static int
341 fdc_err(struct fdc_data *fdc, const char *s)
342 {
343         fdc->fdc_errs++;
344         if (s) {
345                 if (fdc->fdc_errs < FDC_ERRMAX)
346                         device_printf(fdc->fdc_dev, "%s", s);
347                 else if (fdc->fdc_errs == FDC_ERRMAX)
348                         device_printf(fdc->fdc_dev, "too many errors, not "
349                                                     "logging any more\n");
350         }
351
352         return FD_FAILED;
353 }
354
355 /*
356  * fd_cmd: Send a command to the chip.  Takes a varargs with this structure:
357  * Unit number,
358  * # of output bytes, output bytes as ints ...,
359  * # of input bytes, input bytes as ints ...
360  */
361 int
362 fd_cmd(struct fdc_data *fdc, int n_out, ...)
363 {
364         u_char cmd;
365         int n_in;
366         int n;
367         __va_list ap;
368
369         __va_start(ap, n_out);
370         cmd = (u_char)(__va_arg(ap, int));
371         __va_end(ap);
372         __va_start(ap, n_out);
373         for (n = 0; n < n_out; n++)
374         {
375                 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
376                 {
377                         char msg[50];
378                         ksnprintf(msg, sizeof(msg),
379                                 "cmd %x failed at out byte %d of %d\n",
380                                 cmd, n + 1, n_out);
381                         return fdc_err(fdc, msg);
382                 }
383         }
384         n_in = __va_arg(ap, int);
385         for (n = 0; n < n_in; n++)
386         {
387                 int *ptr = __va_arg(ap, int *);
388                 if (fd_in(fdc, ptr) < 0)
389                 {
390                         char msg[50];
391                         ksnprintf(msg, sizeof(msg),
392                                 "cmd %02x failed at in byte %d of %d\n",
393                                 cmd, n + 1, n_in);
394                         return fdc_err(fdc, msg);
395                 }
396         }
397
398         return 0;
399 }
400
401 static int 
402 enable_fifo(fdc_p fdc)
403 {
404         int i, j;
405
406         if ((fdc->flags & FDC_HAS_FIFO) == 0) {
407                 
408                 /*
409                  * XXX: 
410                  * Cannot use fd_cmd the normal way here, since
411                  * this might be an invalid command. Thus we send the
412                  * first byte, and check for an early turn of data directon.
413                  */
414                 
415                 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
416                         return fdc_err(fdc, "Enable FIFO failed\n");
417                 
418                 /* If command is invalid, return */
419                 j = FDSTS_TIMEOUT;
420                 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
421                        != NE7_RQM && j-- > 0) {
422                         if (i == (NE7_DIO | NE7_RQM)) {
423                                 fdc_reset(fdc);
424                                 return FD_FAILED;
425                         }
426                         DELAY(1);
427                 }
428                 if (j<0 || 
429                     fd_cmd(fdc, 3,
430                            0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
431                         fdc_reset(fdc);
432                         return fdc_err(fdc, "Enable FIFO failed\n");
433                 }
434                 fdc->flags |= FDC_HAS_FIFO;
435                 return 0;
436         }
437         if (fd_cmd(fdc, 4,
438                    I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
439                 return fdc_err(fdc, "Re-enable FIFO failed\n");
440         return 0;
441 }
442
443 static int
444 fd_sense_drive_status(fdc_p fdc, int *st3p)
445 {
446         int st3;
447
448         if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
449         {
450                 return fdc_err(fdc, "Sense Drive Status failed\n");
451         }
452         if (st3p)
453                 *st3p = st3;
454
455         return 0;
456 }
457
458 static int
459 fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
460 {
461         int cyl, st0, ret;
462
463         ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
464         if (ret) {
465                 (void)fdc_err(fdc,
466                               "sense intr err reading stat reg 0\n");
467                 return ret;
468         }
469
470         if (st0p)
471                 *st0p = st0;
472
473         if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
474                 /*
475                  * There doesn't seem to have been an interrupt.
476                  */
477                 return FD_NOT_VALID;
478         }
479
480         if (fd_in(fdc, &cyl) < 0) {
481                 return fdc_err(fdc, "can't get cyl num\n");
482         }
483
484         if (cylp)
485                 *cylp = cyl;
486
487         return 0;
488 }
489
490
491 static int
492 fd_read_status(fdc_p fdc, int fdsu)
493 {
494         int i, ret;
495
496         for (i = 0; i < 7; i++) {
497                 /*
498                  * XXX types are poorly chosen.  Only bytes can by read
499                  * from the hardware, but fdc->status[] wants u_ints and
500                  * fd_in() gives ints.
501                  */
502                 int status;
503
504                 ret = fd_in(fdc, &status);
505                 fdc->status[i] = status;
506                 if (ret != 0)
507                         break;
508         }
509
510         if (ret == 0)
511                 fdc->flags |= FDC_STAT_VALID;
512         else
513                 fdc->flags &= ~FDC_STAT_VALID;
514
515         return ret;
516 }
517
518 /****************************************************************************/
519 /*                      autoconfiguration stuff                             */
520 /****************************************************************************/
521
522 int
523 fdc_alloc_resources(struct fdc_data *fdc)
524 {
525         device_t dev;
526         int ispnp, ispcmcia;
527
528         dev = fdc->fdc_dev;
529         ispnp = (fdc->flags & FDC_ISPNP) != 0;
530         ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
531         fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
532         fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
533
534         /*
535          * On standard ISA, we don't just use an 8 port range
536          * (e.g. 0x3f0-0x3f7) since that covers an IDE control
537          * register at 0x3f6.
538          *
539          * Isn't PC hardware wonderful.
540          *
541          * The Y-E Data PCMCIA FDC doesn't have this problem, it
542          * uses the register with offset 6 for pseudo-DMA, and the
543          * one with offset 7 as control register.
544          */
545         fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
546                                              &fdc->rid_ioport, 0ul, ~0ul, 
547                                              ispcmcia ? 8 : (ispnp ? 1 : 6),
548                                              RF_ACTIVE);
549         if (fdc->res_ioport == 0) {
550                 device_printf(dev, "cannot reserve I/O port range\n");
551                 return ENXIO;
552         }
553         fdc->portt = rman_get_bustag(fdc->res_ioport);
554         fdc->porth = rman_get_bushandle(fdc->res_ioport);
555
556         if (!ispcmcia) {
557                 /*
558                  * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
559                  * and some at 0x3f0-0x3f5,0x3f7. We detect the former
560                  * by checking the size and adjust the port address
561                  * accordingly.
562                  */
563                 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
564                         fdc->port_off = -2;
565
566                 /*
567                  * Register the control port range as rid 1 if it
568                  * isn't there already. Most PnP BIOSen will have
569                  * already done this but non-PnP configurations don't.
570                  *
571                  * And some (!!) report 0x3f2-0x3f5 and completely
572                  * leave out the control register!  It seems that some
573                  * non-antique controller chips have a different
574                  * method of programming the transfer speed which
575                  * doesn't require the control register, but it's
576                  * mighty bogus as the chip still responds to the
577                  * address for the control register.
578                  */
579                 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
580                         u_long ctlstart;
581
582                         /* Find the control port, usually 0x3f7 */
583                         ctlstart = rman_get_start(fdc->res_ioport) +
584                                 fdc->port_off + 7;
585
586                         bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1,
587                             -1);
588                 }
589
590                 /*
591                  * Now (finally!) allocate the control port.
592                  */
593                 fdc->rid_ctl = 1;
594                 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
595                                                   &fdc->rid_ctl,
596                                                   0ul, ~0ul, 1, RF_ACTIVE);
597                 if (fdc->res_ctl == 0) {
598                         device_printf(dev,
599                                       "cannot reserve control I/O port range\n");
600                         return ENXIO;
601                 }
602                 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
603                 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
604         }
605
606         fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
607                                           &fdc->rid_irq, 0ul, ~0ul, 1, 
608                                           RF_ACTIVE);
609         if (fdc->res_irq == 0) {
610                 device_printf(dev, "cannot reserve interrupt line\n");
611                 return ENXIO;
612         }
613
614         if ((fdc->flags & FDC_NODMA) == 0) {
615                 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
616                                                   &fdc->rid_drq, 0ul, ~0ul, 1, 
617                                                   RF_ACTIVE);
618                 if (fdc->res_drq == 0) {
619                         device_printf(dev, "cannot reserve DMA request line\n");
620                         return ENXIO;
621                 }
622                 fdc->dmachan = fdc->res_drq->r_start;
623         }
624
625         return 0;
626 }
627
628 void
629 fdc_release_resources(struct fdc_data *fdc)
630 {
631         device_t dev;
632
633         dev = fdc->fdc_dev;
634         if (fdc->res_irq != 0) {
635                 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
636                                         fdc->res_irq);
637                 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
638                                      fdc->res_irq);
639         }
640         if (fdc->res_ctl != 0) {
641                 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
642                                         fdc->res_ctl);
643                 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
644                                      fdc->res_ctl);
645         }
646         if (fdc->res_ioport != 0) {
647                 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
648                                         fdc->res_ioport);
649                 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
650                                      fdc->res_ioport);
651         }
652         if (fdc->res_drq != 0) {
653                 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
654                                         fdc->res_drq);
655                 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
656                                      fdc->res_drq);
657         }
658 }
659
660 /****************************************************************************/
661 /*                      autoconfiguration stuff                             */
662 /****************************************************************************/
663
664 static struct isa_pnp_id fdc_ids[] = {
665         {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
666         {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
667         {0}
668 };
669
670 int
671 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
672 {
673         struct fdc_ivars *ivars = device_get_ivars(child);
674
675         switch (which) {
676         case FDC_IVAR_FDUNIT:
677                 *result = ivars->fdunit;
678                 break;
679         default:
680                 return ENOENT;
681         }
682         return 0;
683 }
684
685 /*
686  * fdc controller section.
687  */
688 static int
689 fdc_probe(device_t dev)
690 {
691         int     error, ic_type;
692         struct  fdc_data *fdc;
693
694         fdc = device_get_softc(dev);
695         bzero(fdc, sizeof *fdc);
696         fdc->fdc_dev = dev;
697         fdc->fdctl_wr = fdctl_wr_isa;
698
699         /* Check pnp ids */
700         error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
701         if (error == ENXIO)
702                 return ENXIO;
703         if (error == 0)
704                 fdc->flags |= FDC_ISPNP;
705
706         /* Attempt to allocate our resources for the duration of the probe */
707         error = fdc_alloc_resources(fdc);
708         if (error)
709                 goto out;
710
711         /* First - lets reset the floppy controller */
712         fdout_wr(fdc, 0);
713         DELAY(100);
714         fdout_wr(fdc, FDO_FRST);
715
716         /* see if it can handle a command */
717         if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 
718                    NE7_SPEC_2(2, 0), 0)) {
719                 error = ENXIO;
720                 goto out;
721         }
722
723         if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
724                 ic_type = (u_char)ic_type;
725                 switch (ic_type) {
726                 case 0x80:
727                         device_set_desc(dev, "NEC 765 or clone");
728                         fdc->fdct = FDC_NE765;
729                         break;
730                 case 0x81:
731                         device_set_desc(dev, "Intel 82077 or clone");
732                         fdc->fdct = FDC_I82077;
733                         break;
734                 case 0x90:
735                         device_set_desc(dev, "NEC 72065B or clone");
736                         fdc->fdct = FDC_NE72065;
737                         break;
738                 default:
739                         device_set_desc(dev, "generic floppy controller");
740                         fdc->fdct = FDC_UNKNOWN;
741                         break;
742                 }
743         }
744
745 out:
746         fdc_release_resources(fdc);
747         return (error);
748 }
749
750 /*
751  * Add a child device to the fdc controller.  It will then be probed etc.
752  */
753 static void
754 fdc_add_child(device_t dev, const char *name, int unit)
755 {
756         int     disabled;
757         struct fdc_ivars *ivar;
758         device_t child;
759
760         ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
761         if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
762                 ivar->fdunit = 0;
763         child = device_add_child(dev, name, unit);
764         if (child == NULL)
765                 return;
766         device_set_ivars(child, ivar);
767         if (resource_int_value(name, unit, "disabled", &disabled) == 0
768             && disabled != 0)
769                 device_disable(child);
770 }
771
772 int
773 fdc_attach(device_t dev)
774 {
775         struct  fdc_data *fdc;
776         int     i, error;
777
778         fdc = device_get_softc(dev);
779
780         callout_init(&fdc->pseudointr_ch);
781
782         error = fdc_alloc_resources(fdc);
783         if (error) {
784                 device_printf(dev, "cannot reacquire resources\n");
785                 return error;
786         }
787         error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
788                                0, fdc_intr, fdc,
789                                &fdc->fdc_intr, NULL, NULL);
790         if (error) {
791                 device_printf(dev, "cannot setup interrupt\n");
792                 return error;
793         }
794         fdc->fdcu = device_get_unit(dev);
795         fdc->flags |= FDC_ATTACHED;
796
797         if ((fdc->flags & FDC_NODMA) == 0) {
798                 /* Acquire the DMA channel forever, The driver will do the rest */
799                                 /* XXX should integrate with rman */
800                 isa_dma_acquire(fdc->dmachan);
801                 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
802         }
803         fdc->state = DEVIDLE;
804
805         /* reset controller, turn motor off, clear fdout mirror reg */
806         fdout_wr(fdc, ((fdc->fdout = 0)));
807         bioq_init(&fdc->bio_queue);
808
809         /*
810          * Probe and attach any children.  We should probably detect
811          * devices from the BIOS unless overridden.
812          */
813         for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
814              i != -1;
815              i = resource_query_string(i, "at", device_get_nameunit(dev)))
816                 fdc_add_child(dev, resource_query_name(i),
817                                resource_query_unit(i));
818
819         return (bus_generic_attach(dev));
820 }
821
822 int
823 fdc_print_child(device_t me, device_t child)
824 {
825         int retval = 0;
826
827         retval += bus_print_child_header(me, child);
828         retval += kprintf(" on %s drive %d\n", device_get_nameunit(me),
829                fdc_get_fdunit(child));
830         
831         return (retval);
832 }
833
834 static device_method_t fdc_methods[] = {
835         /* Device interface */
836         DEVMETHOD(device_probe,         fdc_probe),
837         DEVMETHOD(device_attach,        fdc_attach),
838         DEVMETHOD(device_detach,        bus_generic_detach),
839         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
840         DEVMETHOD(device_suspend,       bus_generic_suspend),
841         DEVMETHOD(device_resume,        bus_generic_resume),
842
843         /* Bus interface */
844         DEVMETHOD(bus_print_child,      fdc_print_child),
845         DEVMETHOD(bus_read_ivar,        fdc_read_ivar),
846         /* Our children never use any other bus interface methods. */
847
848         { 0, 0 }
849 };
850
851 static driver_t fdc_driver = {
852         "fdc",
853         fdc_methods,
854         sizeof(struct fdc_data)
855 };
856
857 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, NULL, NULL);
858 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, NULL, NULL);
859
860 /******************************************************************/
861 /*
862  * devices attached to the controller section.  
863  */
864 static int
865 fd_probe(device_t dev)
866 {
867         int     i;
868         u_int   fdt, st0, st3;
869         struct  fd_data *fd;
870         struct  fdc_data *fdc;
871         fdsu_t  fdsu;
872         static int fd_fifo = 0;
873
874         fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
875         fd = device_get_softc(dev);
876         fdc = device_get_softc(device_get_parent(dev));
877
878         bzero(fd, sizeof *fd);
879         fd->dev = dev;
880         fd->fdc = fdc;
881         fd->fdsu = fdsu;
882         fd->fdu = device_get_unit(dev);
883
884 #ifdef __i386__
885         /* look up what bios thinks we have */
886         switch (fd->fdu) {
887         case 0:
888                 if ((fdc->flags & FDC_ISPCMCIA))
889                         fdt = RTCFDT_144M;
890                 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
891                         fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
892                 else
893                         fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
894                 break;
895         case 1:
896                 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
897                 break;
898         default:
899                 fdt = RTCFDT_NONE;
900                 break;
901         }
902 #else
903         fdt = RTCFDT_144M;      /* XXX probably */
904 #endif
905
906         /* is there a unit? */
907         if (fdt == RTCFDT_NONE)
908                 return (ENXIO);
909
910         /* select it */
911         set_motor(fdc, fdsu, TURNON);
912         DELAY(1000000); /* 1 sec */
913
914         /* XXX This doesn't work before the first set_motor() */
915         if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
916             && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
917             && enable_fifo(fdc) == 0) {
918                 device_printf(device_get_parent(dev),
919                     "FIFO enabled, %d bytes threshold\n", fifo_threshold);
920         }
921         fd_fifo = 1;
922
923         if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
924             && (st3 & NE7_ST3_T0)) {
925                 /* if at track 0, first seek inwards */
926                 /* seek some steps: */
927                 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
928                 DELAY(300000); /* ...wait a moment... */
929                 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
930         }
931
932         /* If we're at track 0 first seek inwards. */
933         if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
934                 /* Seek some steps... */
935                 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
936                         /* ...wait a moment... */
937                         DELAY(300000);
938                         /* make ctrlr happy: */
939                         fd_sense_int(fdc, 0, 0);
940                 }
941         }
942
943         for (i = 0; i < 2; i++) {
944                 /*
945                  * we must recalibrate twice, just in case the
946                  * heads have been beyond cylinder 76, since most
947                  * FDCs still barf when attempting to recalibrate
948                  * more than 77 steps
949                  */
950                 /* go back to 0: */
951                 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
952                         /* a second being enough for full stroke seek*/
953                         DELAY(i == 0 ? 1000000 : 300000);
954
955                         /* anything responding? */
956                         if (fd_sense_int(fdc, &st0, 0) == 0 &&
957                             (st0 & NE7_ST0_EC) == 0)
958                                 break; /* already probed succesfully */
959                 }
960         }
961
962         set_motor(fdc, fdsu, TURNOFF);
963
964         if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
965                 return (ENXIO);
966
967         fd->track = FD_NO_TRACK;
968         fd->fdc = fdc;
969         fd->fdsu = fdsu;
970         fd->options = 0;
971         callout_init(&fd->toffhandle);
972         callout_init(&fd->tohandle);
973         callout_init(&fd->motor);
974
975         switch (fdt) {
976         case RTCFDT_12M:
977                 device_set_desc(dev, "1200-KB 5.25\" drive");
978                 fd->type = FD_1200;
979                 break;
980         case RTCFDT_144M | RTCFDT_144M_PRETENDED:
981                 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
982                 fd->type = FD_1440;
983                 break;
984         case RTCFDT_144M:
985                 device_set_desc(dev, "1440-KB 3.5\" drive");
986                 fd->type = FD_1440;
987                 break;
988         case RTCFDT_288M:
989         case RTCFDT_288M_1:
990                 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
991                 fd->type = FD_1440;
992                 break;
993         case RTCFDT_360K:
994                 device_set_desc(dev, "360-KB 5.25\" drive");
995                 fd->type = FD_360;
996                 break;
997         case RTCFDT_720K:
998                 kprintf("720-KB 3.5\" drive");
999                 fd->type = FD_720;
1000                 break;
1001         default:
1002                 return (ENXIO);
1003         }
1004         fd->ft = fd_types[fd->type - 1];
1005         return (0);
1006 }
1007
1008 static int
1009 fd_attach(device_t dev)
1010 {
1011         struct disk_info info;
1012         struct fd_data *fd;
1013         struct fd_type *ft;
1014
1015         fd = device_get_softc(dev);
1016
1017         disk_create(fd->fdu, &fd->disk, &fd_ops);
1018         disk_setdisktype(&fd->disk, "floppy");
1019
1020         /*
1021          * Make special raw floppy devices with preset types to
1022          * make formatting easier.  These override the disk management
1023          * layer for the whole-slice-disk for partitions 128-191.  Note
1024          * that we do not override partition 255, which is the
1025          * whole-slice-part.  If we did we would have to provide our
1026          * own DIOCGPART ioctl.
1027          */
1028         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 1),
1029                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1720", fd->fdu);
1030         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 2),
1031                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1480", fd->fdu);
1032         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 3),
1033                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1440", fd->fdu);
1034         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 4),
1035                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1200", fd->fdu);
1036         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 5),
1037                  UID_ROOT, GID_WHEEL, 0600, "fd%d.820", fd->fdu);
1038         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 6),
1039                  UID_ROOT, GID_WHEEL, 0600, "fd%d.800", fd->fdu);
1040         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 7),
1041                  UID_ROOT, GID_WHEEL, 0600, "fd%d.720", fd->fdu);
1042         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 8),
1043                  UID_ROOT, GID_WHEEL, 0600, "fd%d.360", fd->fdu);
1044         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 9),
1045                  UID_ROOT, GID_WHEEL, 0600, "fd%d.640", fd->fdu);
1046         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 10),
1047                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1232", fd->fdu);
1048
1049         devstat_add_entry(&fd->device_stats, device_get_name(dev), 
1050                           device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1051                           DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1052                           DEVSTAT_PRIORITY_FD);
1053
1054         if (fd->type != NO_TYPE) {
1055                 bzero(&info, sizeof(info));
1056                 ft = &fd_types[fd->type - 1];
1057                 info.d_media_blksize = 128 << ft->secsize;
1058                 info.d_media_blocks = ft->size;
1059                 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1060                 info.d_nheads = ft->heads;
1061                 info.d_secpertrack = ft->sectrac;
1062                 info.d_secpercyl = ft->sectrac * ft->heads;
1063                 info.d_ncylinders = ft->size / info.d_secpercyl;
1064                 disk_setdiskinfo(&fd->disk, &info);
1065         }
1066         return (0);
1067 }
1068
1069 static int
1070 fd_detach(device_t dev)
1071 {
1072         struct  fd_data *fd;
1073
1074         fd = device_get_softc(dev);
1075         kprintf("devfs: Please make sure that only the right fd device was removed!!!\n");
1076         dev_ops_remove_minor(&fd_ops,
1077                          /*dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),*/
1078                          dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128));
1079         disk_invalidate(&fd->disk);
1080         disk_destroy(&fd->disk);
1081         devstat_remove_entry(&fd->device_stats);
1082         callout_stop(&fd->toffhandle);
1083         callout_stop(&fd->motor);
1084
1085         return (0);
1086 }
1087
1088 static device_method_t fd_methods[] = {
1089         /* Device interface */
1090         DEVMETHOD(device_probe,         fd_probe),
1091         DEVMETHOD(device_attach,        fd_attach),
1092         DEVMETHOD(device_detach,        fd_detach),
1093         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
1094         DEVMETHOD(device_suspend,       bus_generic_suspend), /* XXX */
1095         DEVMETHOD(device_resume,        bus_generic_resume), /* XXX */
1096
1097         { 0, 0 }
1098 };
1099
1100 static driver_t fd_driver = {
1101         "fd",
1102         fd_methods,
1103         sizeof(struct fd_data)
1104 };
1105
1106 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, NULL, NULL);
1107
1108 /****************************************************************************/
1109 /*                            motor control stuff                           */
1110 /*              remember to not deselect the drive we're working on         */
1111 /****************************************************************************/
1112 static void
1113 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1114 {
1115         int fdout = fdc->fdout;
1116         int needspecify = 0;
1117
1118         if(turnon) {
1119                 fdout &= ~FDO_FDSEL;
1120                 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1121         } else
1122                 fdout &= ~(FDO_MOEN0 << fdsu);
1123
1124         if(!turnon
1125            && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1126                 /* gonna turn off the last drive, put FDC to bed */
1127                 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1128         else {
1129                 /* make sure controller is selected and specified */
1130                 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1131                         needspecify = 1;
1132                 fdout |= (FDO_FRST|FDO_FDMAEN);
1133         }
1134
1135         fdout_wr(fdc, fdout);
1136         fdc->fdout = fdout;
1137         TRACE1("[0x%x->FDOUT]", fdout);
1138
1139         if (needspecify) {
1140                 /*
1141                  * XXX
1142                  * special case: since we have just woken up the FDC
1143                  * from its sleep, we silently assume the command will
1144                  * be accepted, and do not test for a timeout
1145                  */
1146                 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1147                              NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1148                              0);
1149                 if (fdc->flags & FDC_HAS_FIFO)
1150                         (void) enable_fifo(fdc);
1151         }
1152 }
1153
1154 static void
1155 fd_turnoff(void *xfd)
1156 {
1157         fd_p fd = xfd;
1158
1159         TRACE1("[fd%d: turnoff]", fd->fdu);
1160
1161         crit_enter();
1162         /*
1163          * Don't turn off the motor yet if the drive is active.
1164          *
1165          * If we got here, this could only mean we missed an interrupt.
1166          * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1167          * after a controller reset.  Just schedule a pseudo-interrupt
1168          * so the state machine gets re-entered.
1169          */
1170         if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1171                 fdc_intr(fd->fdc);
1172                 crit_exit();
1173                 return;
1174         }
1175
1176         fd->flags &= ~FD_MOTOR;
1177         set_motor(fd->fdc, fd->fdsu, TURNOFF);
1178         crit_exit();
1179 }
1180
1181 static void
1182 fd_motor_on(void *xfd)
1183 {
1184         fd_p fd = xfd;
1185
1186         crit_enter();
1187         fd->flags &= ~FD_MOTOR_WAIT;
1188         if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1189         {
1190                 fdc_intr(fd->fdc);
1191         }
1192         crit_exit();
1193 }
1194
1195 static void
1196 fd_turnon(fd_p fd)
1197 {
1198         if(!(fd->flags & FD_MOTOR))
1199         {
1200                 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1201                 set_motor(fd->fdc, fd->fdsu, TURNON);
1202                 callout_reset(&fd->motor, hz, fd_motor_on, fd);
1203         }
1204 }
1205
1206 static void
1207 fdc_reset(fdc_p fdc)
1208 {
1209         /* Try a reset, keep motor on */
1210         fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1211         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1212         DELAY(100);
1213         /* enable FDC, but defer interrupts a moment */
1214         fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1215         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1216         DELAY(100);
1217         fdout_wr(fdc, fdc->fdout);
1218         TRACE1("[0x%x->FDOUT]", fdc->fdout);
1219
1220         /* XXX after a reset, silently believe the FDC will accept commands */
1221         (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1222                      NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1223                      0);
1224         if (fdc->flags & FDC_HAS_FIFO)
1225                 (void) enable_fifo(fdc);
1226 }
1227
1228 /****************************************************************************/
1229 /*                             fdc in/out                                   */
1230 /****************************************************************************/
1231 /*
1232  * FDC IO functions, take care of the main status register, timeout
1233  * in case the desired status bits are never set.
1234  *
1235  * These PIO loops initially start out with short delays between
1236  * each iteration in the expectation that the required condition
1237  * is usually met quickly, so it can be handled immediately.  After
1238  * about 1 ms, stepping is increased to achieve a better timing
1239  * accuracy in the calls to DELAY().
1240  */
1241 static int
1242 fd_in(struct fdc_data *fdc, int *ptr)
1243 {
1244         int i, j, step;
1245
1246         for (j = 0, step = 1;
1247             (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1248             j < FDSTS_TIMEOUT;
1249             j += step) {
1250                 if (i == NE7_RQM)
1251                         return (fdc_err(fdc, "ready for output in input\n"));
1252                 if (j == 1000)
1253                         step = 1000;
1254                 DELAY(step);
1255         }
1256         if (j >= FDSTS_TIMEOUT)
1257                 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1258 #ifdef  FDC_DEBUG
1259         i = fddata_rd(fdc);
1260         TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1261         *ptr = i;
1262         return (0);
1263 #else   /* !FDC_DEBUG */
1264         i = fddata_rd(fdc);
1265         if (ptr)
1266                 *ptr = i;
1267         return (0);
1268 #endif  /* FDC_DEBUG */
1269 }
1270
1271 static int
1272 out_fdc(struct fdc_data *fdc, int x)
1273 {
1274         int i, j, step;
1275
1276         for (j = 0, step = 1;
1277             (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1278             j < FDSTS_TIMEOUT;
1279             j += step) {
1280                 if (i == (NE7_DIO|NE7_RQM))
1281                         return (fdc_err(fdc, "ready for input in output\n"));
1282                 if (j == 1000)
1283                         step = 1000;
1284                 DELAY(step);
1285         }
1286         if (j >= FDSTS_TIMEOUT)
1287                 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1288
1289         /* Send the command and return */
1290         fddata_wr(fdc, x);
1291         TRACE1("[0x%x->FDDATA]", x);
1292         return (0);
1293 }
1294
1295 /****************************************************************************/
1296 /*                           fdopen/fdclose                                 */
1297 /****************************************************************************/
1298 int
1299 Fdopen(struct dev_open_args *ap)
1300 {
1301         cdev_t dev = ap->a_head.a_dev;
1302         fdu_t fdu = dkunit(dev);
1303         struct disk_info info;
1304         struct fd_type *ft;
1305         int     type;
1306         int     changetype;
1307         fd_p    fd;
1308         fdc_p   fdc;
1309
1310         /* check bounds */
1311         if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1312                 return (ENXIO);
1313         fdc = fd->fdc;
1314         if ((fdc == NULL) || (fd->type == NO_TYPE))
1315                 return (ENXIO);
1316
1317         /*
1318          * Figure out the type of floppy.  There are special whole-disk-device
1319          * overrides that will override the current type.
1320          */
1321         type = dkpart(dev);
1322         if (type == WHOLE_SLICE_PART) {
1323                 type = fd->type;        /* do not change selected type data */
1324                 changetype = 0;
1325         } else if (type > 128) {
1326                 type -= 128;            /* set to specific format */
1327                 changetype = 1;
1328         } else {
1329                 type = fd->type;        /* reset to default */
1330                 changetype = 1;
1331         }
1332         if (type > NUMDENS)
1333                 return (ENXIO);
1334         if (type != fd->type) {
1335                 /*
1336                  * For each type of basic drive, make sure we are trying
1337                  * to open a type it can do,
1338                  */
1339                 switch (fd->type) {
1340                 case FD_360:
1341                         return (ENXIO);
1342                 case FD_720:
1343                         if (   type != FD_820
1344                             && type != FD_800
1345                             && type != FD_640
1346                            )
1347                                 return (ENXIO);
1348                         break;
1349                 case FD_1200:
1350                         switch (type) {
1351                         case FD_1480:
1352                                 type = FD_1480in5_25;
1353                                 break;
1354                         case FD_1440:
1355                                 type = FD_1440in5_25;
1356                                 break;
1357                         case FD_1232:
1358                                 break;
1359                         case FD_820:
1360                                 type = FD_820in5_25;
1361                                 break;
1362                         case FD_800:
1363                                 type = FD_800in5_25;
1364                                 break;
1365                         case FD_720:
1366                                 type = FD_720in5_25;
1367                                 break;
1368                         case FD_640:
1369                                 type = FD_640in5_25;
1370                                 break;
1371                         case FD_360:
1372                                 type = FD_360in5_25;
1373                                 break;
1374                         default:
1375                                 return(ENXIO);
1376                         }
1377                         break;
1378                 case FD_1440:
1379                         if (   type != FD_1720
1380                             && type != FD_1480
1381                             && type != FD_1200
1382                             && type != FD_820
1383                             && type != FD_800
1384                             && type != FD_720
1385                             && type != FD_640
1386                             )
1387                                 return(ENXIO);
1388                         break;
1389                 }
1390         }
1391
1392         /*
1393          * fd->type is the basic drive type, not the current format
1394          * we are reading.  We only change the type when opening the
1395          * whole-slice-partition
1396          */
1397         if (changetype)
1398                 fd->ft = fd_types[type - 1];
1399         fd->flags |= FD_OPEN;
1400
1401         /*
1402          * Clearing the DMA overrun counter at open time is a bit messy.
1403          * Since we're only managing one counter per controller, opening
1404          * the second drive could mess it up.  Anyway, if the DMA overrun
1405          * condition is really persistent, it will eventually time out
1406          * still.  OTOH, clearing it here will ensure we'll at least start
1407          * trying again after a previous (maybe even long ago) failure.
1408          * Also, this is merely a stop-gap measure only that should not
1409          * happen during normal operation, so we can tolerate it to be a
1410          * bit sloppy about this.
1411          */
1412         fdc->dma_overruns = 0;
1413
1414         /*
1415          * Set disk parameters for the disk management layer.
1416          *
1417          * Note that we do not set RAWEXTENSIONS here.  We override
1418          * the minor numbers in the raw-extension range and handle them
1419          * directly.
1420          */
1421         bzero(&info, sizeof(info));
1422         ft = &fd->ft;
1423         info.d_media_blksize = 128 << ft->secsize;
1424         info.d_media_blocks = ft->size;
1425         info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1426         info.d_nheads = ft->heads;
1427         info.d_secpertrack = ft->sectrac; 
1428         info.d_secpercyl = ft->sectrac * ft->heads;
1429         info.d_ncylinders = ft->size / info.d_secpercyl;
1430         disk_setdiskinfo(&fd->disk, &info);
1431
1432         return 0;
1433 }
1434
1435 int
1436 fdclose(struct dev_close_args *ap)
1437 {
1438         cdev_t dev = ap->a_head.a_dev;
1439         fdu_t fdu = dkunit(dev);
1440         struct fd_data *fd;
1441
1442         fd = devclass_get_softc(fd_devclass, fdu);
1443         fd->flags &= ~FD_OPEN;
1444         fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1445
1446         return (0);
1447 }
1448
1449 /****************************************************************************/
1450 /*                               fdstrategy                                 */
1451 /****************************************************************************/
1452 int
1453 fdstrategy(struct dev_strategy_args *ap)
1454 {
1455         cdev_t dev = ap->a_head.a_dev;
1456         struct bio *bio = ap->a_bio;
1457         struct buf *bp = bio->bio_buf;
1458         unsigned nblocks, blknum, cando;
1459         fdu_t   fdu;
1460         fdc_p   fdc;
1461         fd_p    fd;
1462         size_t  fdblk;
1463
1464         fdu = dkunit(dev);
1465         fd = devclass_get_softc(fd_devclass, fdu);
1466         if (fd == 0)
1467                 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1468                       (u_long)major(dev), (u_long)minor(dev));
1469         fdc = fd->fdc;
1470         if (fd->type == NO_TYPE) {
1471                 bp->b_error = ENXIO;
1472                 bp->b_flags |= B_ERROR;
1473                 goto bad;
1474         };
1475
1476         fdblk = 128 << (fd->ft.secsize);
1477         if (bp->b_cmd != BUF_CMD_FORMAT) {
1478                 if (bio->bio_offset < 0) {
1479                         kprintf(
1480                 "fd%d: fdstrat: bad request offset = %"PRId64", bcount = %d\n",
1481                                fdu, bio->bio_offset, bp->b_bcount);
1482                         bp->b_error = EINVAL;
1483                         bp->b_flags |= B_ERROR;
1484                         goto bad;
1485                 }
1486                 if ((bp->b_bcount % fdblk) != 0) {
1487                         bp->b_error = EINVAL;
1488                         bp->b_flags |= B_ERROR;
1489                         goto bad;
1490                 }
1491         }
1492
1493         /*
1494          * Set up block calculations.
1495          */
1496         if (bio->bio_offset > 20000000LL * fdblk) {
1497                 /*
1498                  * Reject unreasonably high block number, prevent the
1499                  * multiplication below from overflowing.
1500                  */
1501                 bp->b_error = EINVAL;
1502                 bp->b_flags |= B_ERROR;
1503                 goto bad;
1504         }
1505         blknum = (unsigned)(bio->bio_offset / fdblk);
1506         nblocks = fd->ft.size;
1507         bp->b_resid = 0;
1508         if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1509                 if (blknum <= nblocks) {
1510                         cando = (nblocks - blknum) * fdblk;
1511                         bp->b_resid = bp->b_bcount - cando;
1512                         if (cando == 0)
1513                                 goto bad;       /* not actually bad but EOF */
1514                 } else {
1515                         bp->b_error = EINVAL;
1516                         bp->b_flags |= B_ERROR;
1517                         goto bad;
1518                 }
1519         }
1520         crit_enter();
1521         bio->bio_driver_info = dev;
1522         bioqdisksort(&fdc->bio_queue, bio);
1523         callout_stop(&fd->toffhandle);
1524
1525         /* Tell devstat we are starting on the transaction */
1526         devstat_start_transaction(&fd->device_stats);
1527 #if 0
1528         device_busy(fd->dev);
1529 #endif
1530         fdstart(fdc);
1531         crit_exit();
1532         return(0);
1533
1534 bad:
1535         biodone(bio);
1536         return(0);
1537 }
1538
1539 /***************************************************************\
1540 *                               fdstart                         *
1541 * We have just queued something.. if the controller is not busy *
1542 * then simulate the case where it has just finished a command   *
1543 * So that it (the interrupt routine) looks on the queue for more*
1544 * work to do and picks up what we just added.                   *
1545 * If the controller is already busy, we need do nothing, as it  *
1546 * will pick up our work when the present work completes         *
1547 \***************************************************************/
1548 static void
1549 fdstart(struct fdc_data *fdc)
1550 {
1551         crit_enter();
1552         if(fdc->state == DEVIDLE)
1553         {
1554                 fdc_intr(fdc);
1555         }
1556         crit_exit();
1557 }
1558
1559 static void
1560 fd_iotimeout(void *xfdc)
1561 {
1562         fdc_p fdc;
1563
1564         fdc = xfdc;
1565         TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1566
1567         /*
1568          * Due to IBM's brain-dead design, the FDC has a faked ready
1569          * signal, hardwired to ready == true. Thus, any command
1570          * issued if there's no diskette in the drive will _never_
1571          * complete, and must be aborted by resetting the FDC.
1572          * Many thanks, Big Blue!
1573          * The FDC must not be reset directly, since that would
1574          * interfere with the state machine.  Instead, pretend that
1575          * the command completed but was invalid.  The state machine
1576          * will reset the FDC and retry once.
1577          */
1578         crit_enter();
1579         fdc->status[0] = NE7_ST0_IC_IV;
1580         fdc->flags &= ~FDC_STAT_VALID;
1581         fdc->state = IOTIMEDOUT;
1582         fdc_intr(fdc);
1583         crit_exit();
1584 }
1585
1586 /* just ensure it is running in a critical section */
1587 static void
1588 fd_pseudointr(void *xfdc)
1589 {
1590         crit_enter();
1591         fdc_intr(xfdc);
1592         crit_exit();
1593 }
1594
1595 /***********************************************************************\
1596 *                                 fdintr                                *
1597 * keep calling the state machine until it returns a 0                   *
1598 * ALWAYS called at SPLBIO                                               *
1599 \***********************************************************************/
1600 static void
1601 fdc_intr(void *xfdc)
1602 {
1603         fdc_p fdc = xfdc;
1604         while(fdstate(fdc))
1605                 ;
1606 }
1607
1608 /*
1609  * magic pseudo-DMA initialization for YE FDC. Sets count and
1610  * direction
1611  */
1612 #define SET_BCDR(fdc,wr,cnt,port) \
1613         bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port,  \
1614             ((cnt)-1) & 0xff);                                           \
1615         bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1616             ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1617
1618 /*
1619  * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1620  */
1621 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
1622 {
1623         u_char *cptr = (u_char *)addr;
1624
1625         if (cmd == BUF_CMD_READ) {
1626                 if (fdc->state != PIOREAD) {
1627                         fdc->state = PIOREAD;
1628                         return(0);
1629                 };
1630                 SET_BCDR(fdc, 0, count, 0);
1631                 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1632                     FDC_YE_DATAPORT, cptr, count);
1633         } else {
1634                 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1635                     FDC_YE_DATAPORT, cptr, count);
1636                 SET_BCDR(fdc, 0, count, 0);
1637         };
1638         return(1);
1639 }
1640
1641 /***********************************************************************\
1642 * The controller state machine.                                         *
1643 * if it returns a non zero value, it should be called again immediatly  *
1644 \***********************************************************************/
1645 static int
1646 fdstate(fdc_p fdc)
1647 {
1648         int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1649         unsigned blknum = 0, b_cylinder = 0;
1650         fdu_t fdu;
1651         fd_p fd;
1652         struct bio *bio;
1653         struct buf *bp;
1654         struct fd_formb *finfo = NULL;
1655         size_t fdblk;
1656         cdev_t dev;
1657
1658         bio = fdc->bio;
1659         if (bio == NULL) {
1660                 bio = bioq_first(&fdc->bio_queue);
1661                 if (bio != NULL) {
1662                         bioq_remove(&fdc->bio_queue, bio);
1663                         fdc->bio = bio;
1664                 }
1665         }
1666         if (bio == NULL) {
1667                 /***********************************************\
1668                 * nothing left for this controller to do        *
1669                 * Force into the IDLE state,                    *
1670                 \***********************************************/
1671                 fdc->state = DEVIDLE;
1672                 if (fdc->fd) {
1673                         device_printf(fdc->fdc_dev,
1674                             "unexpected valid fd pointer\n");
1675                         fdc->fd = (fd_p) 0;
1676                         fdc->fdu = -1;
1677                 }
1678                 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1679                 return (0);
1680         }
1681         bp = bio->bio_buf;
1682         dev = bio->bio_driver_info;
1683
1684         fdu = dkunit(dev);
1685         fd = devclass_get_softc(fd_devclass, fdu);
1686         fdblk = 128 << fd->ft.secsize;
1687         if (fdc->fd && (fd != fdc->fd))
1688                 device_printf(fd->dev, "confused fd pointers\n");
1689         read = (bp->b_cmd == BUF_CMD_READ);
1690         format = (bp->b_cmd == BUF_CMD_FORMAT);
1691         if (format) {
1692                 finfo = (struct fd_formb *)bp->b_data;
1693                 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1694                         - (char *)finfo;
1695         }
1696         if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1697                 blknum = (unsigned)(bio->bio_offset / fdblk) +
1698                          fd->skip  /fdblk;
1699                 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads);
1700         }
1701         TRACE1("fd%d", fdu);
1702         TRACE1("[%s]", fdstates[fdc->state]);
1703         TRACE1("(0x%x)", fd->flags);
1704         callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
1705         switch (fdc->state)
1706         {
1707         case DEVIDLE:
1708         case FINDWORK:  /* we have found new work */
1709                 fdc->retry = 0;
1710                 fd->skip = 0;
1711                 fdc->fd = fd;
1712                 fdc->fdu = fdu;
1713                 fdc->fdctl_wr(fdc, fd->ft.trans);
1714                 TRACE1("[0x%x->FDCTL]", fd->ft.trans);
1715                 /*******************************************************\
1716                 * If the next drive has a motor startup pending, then   *
1717                 * it will start up in its own good time         *
1718                 \*******************************************************/
1719                 if(fd->flags & FD_MOTOR_WAIT) {
1720                         fdc->state = MOTORWAIT;
1721                         return (0); /* come back later */
1722                 }
1723                 /*******************************************************\
1724                 * Maybe if it's not starting, it SHOULD be starting     *
1725                 \*******************************************************/
1726                 if (!(fd->flags & FD_MOTOR))
1727                 {
1728                         fdc->state = MOTORWAIT;
1729                         fd_turnon(fd);
1730                         return (0);
1731                 }
1732                 else    /* at least make sure we are selected */
1733                 {
1734                         set_motor(fdc, fd->fdsu, TURNON);
1735                 }
1736                 if (fdc->flags & FDC_NEEDS_RESET) {
1737                         fdc->state = RESETCTLR;
1738                         fdc->flags &= ~FDC_NEEDS_RESET;
1739                 } else
1740                         fdc->state = DOSEEK;
1741                 break;
1742         case DOSEEK:
1743                 if (b_cylinder == (unsigned)fd->track)
1744                 {
1745                         fdc->state = SEEKCOMPLETE;
1746                         break;
1747                 }
1748                 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1749                            fd->fdsu, b_cylinder * fd->ft.steptrac,
1750                            0))
1751                 {
1752                         /*
1753                          * seek command not accepted, looks like
1754                          * the FDC went off to the Saints...
1755                          */
1756                         fdc->retry = 6; /* try a reset */
1757                         return(retrier(fdc));
1758                 }
1759                 fd->track = FD_NO_TRACK;
1760                 fdc->state = SEEKWAIT;
1761                 return(0);      /* will return later */
1762         case SEEKWAIT:
1763                 /* allow heads to settle */
1764                 callout_reset(&fdc->pseudointr_ch, hz / 16,
1765                                fd_pseudointr, fdc);
1766                 fdc->state = SEEKCOMPLETE;
1767                 return(0);      /* will return later */
1768         case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1769                 /* Make sure seek really happened*/
1770                 if(fd->track == FD_NO_TRACK) {
1771                         int descyl = b_cylinder * fd->ft.steptrac;
1772                         do {
1773                                 /*
1774                                  * This might be a "ready changed" interrupt,
1775                                  * which cannot really happen since the
1776                                  * RDY pin is hardwired to + 5 volts.  This
1777                                  * generally indicates a "bouncing" intr
1778                                  * line, so do one of the following:
1779                                  *
1780                                  * When running on an enhanced FDC that is
1781                                  * known to not go stuck after responding
1782                                  * with INVALID, fetch all interrupt states
1783                                  * until seeing either an INVALID or a
1784                                  * real interrupt condition.
1785                                  *
1786                                  * When running on a dumb old NE765, give
1787                                  * up immediately.  The controller will
1788                                  * provide up to four dummy RC interrupt
1789                                  * conditions right after reset (for the
1790                                  * corresponding four drives), so this is
1791                                  * our only chance to get notice that it
1792                                  * was not the FDC that caused the interrupt.
1793                                  */
1794                                 if (fd_sense_int(fdc, &st0, &cyl)
1795                                     == FD_NOT_VALID)
1796                                         return 0;
1797                                 if(fdc->fdct == FDC_NE765
1798                                    && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1799                                         return 0; /* hope for a real intr */
1800                         } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1801
1802                         if (0 == descyl) {
1803                                 int failed = 0;
1804                                 /*
1805                                  * seek to cyl 0 requested; make sure we are
1806                                  * really there
1807                                  */
1808                                 if (fd_sense_drive_status(fdc, &st3))
1809                                         failed = 1;
1810                                 if ((st3 & NE7_ST3_T0) == 0) {
1811                                         kprintf(
1812                 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1813                                                fdu, st3, NE7_ST3BITS);
1814                                         failed = 1;
1815                                 }
1816
1817                                 if (failed) {
1818                                         if(fdc->retry < 3)
1819                                                 fdc->retry = 3;
1820                                         return (retrier(fdc));
1821                                 }
1822                         }
1823
1824                         if (cyl != descyl) {
1825                                 kprintf(
1826                 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1827                                        fdu, descyl, cyl, st0);
1828                                 if (fdc->retry < 3)
1829                                         fdc->retry = 3;
1830                                 return (retrier(fdc));
1831                         }
1832                 }
1833
1834                 fd->track = b_cylinder;
1835                 if (!(fdc->flags & FDC_NODMA)) {
1836                         isa_dmastart(isa_dmabp(bp),
1837                                      bp->b_data+fd->skip,
1838                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
1839                 }
1840                 sectrac = fd->ft.sectrac;
1841                 sec = blknum %  (sectrac * fd->ft.heads);
1842                 head = sec / sectrac;
1843                 sec = sec % sectrac + 1;
1844                 fd->hddrv = ((head&1)<<2)+fdu;
1845
1846                 if(format || !read)
1847                 {
1848                         /* make sure the drive is writable */
1849                         if(fd_sense_drive_status(fdc, &st3) != 0)
1850                         {
1851                                 /* stuck controller? */
1852                                 if (!(fdc->flags & FDC_NODMA))
1853                                         isa_dmadone(isa_dmabp(bp),
1854                                                     bp->b_data + fd->skip,
1855                                                     format ? bp->b_bcount : fdblk,
1856                                                     fdc->dmachan);
1857                                 fdc->retry = 6; /* reset the beast */
1858                                 return (retrier(fdc));
1859                         }
1860                         if(st3 & NE7_ST3_WP)
1861                         {
1862                                 /*
1863                                  * XXX YES! this is ugly.
1864                                  * in order to force the current operation
1865                                  * to fail, we will have to fake an FDC
1866                                  * error - all error handling is done
1867                                  * by the retrier()
1868                                  */
1869                                 fdc->status[0] = NE7_ST0_IC_AT;
1870                                 fdc->status[1] = NE7_ST1_NW;
1871                                 fdc->status[2] = 0;
1872                                 fdc->status[3] = fd->track;
1873                                 fdc->status[4] = head;
1874                                 fdc->status[5] = sec;
1875                                 fdc->retry = 8; /* break out immediately */
1876                                 fdc->state = IOTIMEDOUT; /* not really... */
1877                                 return (1);
1878                         }
1879                 }
1880
1881                 if (format) {
1882                         if (fdc->flags & FDC_NODMA) {
1883                                 /*
1884                                  * This seems to be necessary for
1885                                  * whatever obscure reason; if we omit
1886                                  * it, we end up filling the sector ID
1887                                  * fields of the newly formatted track
1888                                  * entirely with garbage, causing
1889                                  * `wrong cylinder' errors all over
1890                                  * the place when trying to read them
1891                                  * back.
1892                                  *
1893                                  * Umpf.
1894                                  */
1895                                 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1896
1897                                 (void)fdcpio(fdc,bp->b_cmd,
1898                                         bp->b_data+fd->skip,
1899                                         bp->b_bcount);
1900
1901                         }
1902                         /* formatting */
1903                         if(fd_cmd(fdc, 6,  NE7CMD_FORMAT, head << 2 | fdu,
1904                                   finfo->fd_formb_secshift,
1905                                   finfo->fd_formb_nsecs,
1906                                   finfo->fd_formb_gaplen,
1907                                   finfo->fd_formb_fillbyte, 0)) {
1908                                 /* controller fell over */
1909                                 if (!(fdc->flags & FDC_NODMA))
1910                                         isa_dmadone(isa_dmabp(bp),
1911                                                     bp->b_data + fd->skip,
1912                                                     format ? bp->b_bcount : fdblk,
1913                                                     fdc->dmachan);
1914                                 fdc->retry = 6;
1915                                 return (retrier(fdc));
1916                         }
1917                 } else {
1918                         if (fdc->flags & FDC_NODMA) {
1919                                 /*
1920                                  * this seems to be necessary even when
1921                                  * reading data
1922                                  */
1923                                 SET_BCDR(fdc, 1, fdblk, 0);
1924
1925                                 /*
1926                                  * perform the write pseudo-DMA before
1927                                  * the WRITE command is sent
1928                                  */
1929                                 if (!read)
1930                                         (void)fdcpio(fdc,bp->b_cmd,
1931                                             bp->b_data+fd->skip,
1932                                             fdblk);
1933                         }
1934                         if (fd_cmd(fdc, 9,
1935                                    (read ? NE7CMD_READ : NE7CMD_WRITE),
1936                                    head << 2 | fdu,  /* head & unit */
1937                                    fd->track,        /* track */
1938                                    head,
1939                                    sec,              /* sector + 1 */
1940                                    fd->ft.secsize,   /* sector size */
1941                                    sectrac,          /* sectors/track */
1942                                    fd->ft.gap,       /* gap size */
1943                                    fd->ft.datalen,   /* data length */
1944                                    0)) {
1945                                 /* the beast is sleeping again */
1946                                 if (!(fdc->flags & FDC_NODMA))
1947                                         isa_dmadone(isa_dmabp(bp),
1948                                                     bp->b_data + fd->skip,
1949                                                     format ? bp->b_bcount : fdblk,
1950                                                     fdc->dmachan);
1951                                 fdc->retry = 6;
1952                                 return (retrier(fdc));
1953                         }
1954                 }
1955                 if (fdc->flags & FDC_NODMA)
1956                         /*
1957                          * if this is a read, then simply await interrupt
1958                          * before performing PIO
1959                          */
1960                         if (read && !fdcpio(fdc,bp->b_cmd,
1961                             bp->b_data+fd->skip,fdblk)) {
1962                                 callout_reset(&fd->tohandle, hz,
1963                                                 fd_iotimeout, fdc);
1964                                 return(0);      /* will return later */
1965                         };
1966
1967                 /*
1968                  * write (or format) operation will fall through and
1969                  * await completion interrupt
1970                  */
1971                 fdc->state = IOCOMPLETE;
1972                 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
1973                 return (0);     /* will return later */
1974         case PIOREAD:
1975                 /* 
1976                  * actually perform the PIO read.  The IOCOMPLETE case
1977                  * removes the timeout for us.  
1978                  */
1979                 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
1980                 fdc->state = IOCOMPLETE;
1981                 /* FALLTHROUGH */
1982         case IOCOMPLETE: /* IO DONE, post-analyze */
1983                 callout_stop(&fd->tohandle);
1984
1985                 if (fd_read_status(fdc, fd->fdsu)) {
1986                         if (!(fdc->flags & FDC_NODMA)) {
1987                                 isa_dmadone(isa_dmabp(bp),
1988                                             bp->b_data + fd->skip,
1989                                             format ? bp->b_bcount : fdblk,
1990                                             fdc->dmachan);
1991                         }
1992                         if (fdc->retry < 6)
1993                                 fdc->retry = 6; /* force a reset */
1994                         return (retrier(fdc));
1995                 }
1996
1997                 fdc->state = IOTIMEDOUT;
1998
1999                 /* FALLTHROUGH */
2000
2001         case IOTIMEDOUT:
2002                 if (!(fdc->flags & FDC_NODMA)) {
2003                         isa_dmadone(isa_dmabp(bp),
2004                                     bp->b_data + fd->skip,
2005                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
2006                 }
2007                 if (fdc->status[0] & NE7_ST0_IC) {
2008                         if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2009                             && fdc->status[1] & NE7_ST1_OR) {
2010                                 /*
2011                                  * DMA overrun. Someone hogged the bus and
2012                                  * didn't release it in time for the next
2013                                  * FDC transfer.
2014                                  *
2015                                  * We normally restart this without bumping
2016                                  * the retry counter.  However, in case
2017                                  * something is seriously messed up (like
2018                                  * broken hardware), we rather limit the
2019                                  * number of retries so the IO operation
2020                                  * doesn't block indefinately.
2021                                  */
2022                                 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
2023                                         fdc->state = SEEKCOMPLETE;
2024                                         return (1);
2025                                 } /* else fall through */
2026                         }
2027                         if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
2028                                 && fdc->retry < 6)
2029                                 fdc->retry = 6; /* force a reset */
2030                         else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2031                                 && fdc->status[2] & NE7_ST2_WC
2032                                 && fdc->retry < 3)
2033                                 fdc->retry = 3; /* force recalibrate */
2034                         return (retrier(fdc));
2035                 }
2036                 /* All OK */
2037                 /* Operation successful, retry DMA overruns again next time. */
2038                 fdc->dma_overruns = 0;
2039                 fd->skip += fdblk;
2040                 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
2041                         /* set up next transfer */
2042                         fdc->state = DOSEEK;
2043                 } else {
2044                         /* ALL DONE */
2045                         fd->skip = 0;
2046                         fdc->bio = NULL;
2047 #if 0
2048                         device_unbusy(fd->dev);
2049 #endif
2050                         devstat_end_transaction_buf(&fd->device_stats, bp);
2051                         biodone(bio);
2052                         fdc->fd = (fd_p) 0;
2053                         fdc->fdu = -1;
2054                         fdc->state = FINDWORK;
2055                 }
2056                 return (1);
2057         case RESETCTLR:
2058                 fdc_reset(fdc);
2059                 fdc->retry++;
2060                 fdc->state = RESETCOMPLETE;
2061                 return (0);
2062         case RESETCOMPLETE:
2063                 /*
2064                  * Discard all the results from the reset so that they
2065                  * can't cause an unexpected interrupt later.
2066                  */
2067                 for (i = 0; i < 4; i++)
2068                         (void)fd_sense_int(fdc, &st0, &cyl);
2069                 fdc->state = STARTRECAL;
2070                 /* Fall through. */
2071         case STARTRECAL:
2072                 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
2073                         /* arrgl */
2074                         fdc->retry = 6;
2075                         return (retrier(fdc));
2076                 }
2077                 fdc->state = RECALWAIT;
2078                 return (0);     /* will return later */
2079         case RECALWAIT:
2080                 /* allow heads to settle */
2081                 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
2082                 fdc->state = RECALCOMPLETE;
2083                 return (0);     /* will return later */
2084         case RECALCOMPLETE:
2085                 do {
2086                         /*
2087                          * See SEEKCOMPLETE for a comment on this:
2088                          */
2089                         if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2090                                 return 0;
2091                         if(fdc->fdct == FDC_NE765
2092                            && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2093                                 return 0; /* hope for a real intr */
2094                 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2095                 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2096                 {
2097                         if(fdc->retry > 3)
2098                                 /*
2099                                  * a recalibrate from beyond cylinder 77
2100                                  * will "fail" due to the FDC limitations;
2101                                  * since people used to complain much about
2102                                  * the failure message, try not logging
2103                                  * this one if it seems to be the first
2104                                  * time in a line
2105                                  */
2106                                 kprintf("fd%d: recal failed ST0 %b cyl %d\n",
2107                                        fdu, st0, NE7_ST0BITS, cyl);
2108                         if(fdc->retry < 3) fdc->retry = 3;
2109                         return (retrier(fdc));
2110                 }
2111                 fd->track = 0;
2112                 /* Seek (probably) necessary */
2113                 fdc->state = DOSEEK;
2114                 return (1);     /* will return immediatly */
2115         case MOTORWAIT:
2116                 if(fd->flags & FD_MOTOR_WAIT)
2117                 {
2118                         return (0); /* time's not up yet */
2119                 }
2120                 if (fdc->flags & FDC_NEEDS_RESET) {
2121                         fdc->state = RESETCTLR;
2122                         fdc->flags &= ~FDC_NEEDS_RESET;
2123                 } else {
2124                         /*
2125                          * If all motors were off, then the controller was
2126                          * reset, so it has lost track of the current
2127                          * cylinder.  Recalibrate to handle this case.
2128                          * But first, discard the results of the reset.
2129                          */
2130                         fdc->state = RESETCOMPLETE;
2131                 }
2132                 return (1);     /* will return immediatly */
2133         default:
2134                 device_printf(fdc->fdc_dev, "unexpected FD int->");
2135                 if (fd_read_status(fdc, fd->fdsu) == 0)
2136                         kprintf("FDC status :%x %x %x %x %x %x %x   ",
2137                                fdc->status[0],
2138                                fdc->status[1],
2139                                fdc->status[2],
2140                                fdc->status[3],
2141                                fdc->status[4],
2142                                fdc->status[5],
2143                                fdc->status[6] );
2144                 else
2145                         kprintf("No status available   ");
2146                 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2147                 {
2148                         kprintf("[controller is dead now]\n");
2149                         return (0);
2150                 }
2151                 kprintf("ST0 = %x, PCN = %x\n", st0, cyl);
2152                 return (0);
2153         }
2154         /*XXX confusing: some branches return immediately, others end up here*/
2155         return (1); /* Come back immediatly to new state */
2156 }
2157
2158 static int
2159 retrier(struct fdc_data *fdc)
2160 {
2161         struct bio *bio;
2162         struct buf *bp;
2163         struct fd_data *fd;
2164         cdev_t dev;
2165         int fdu;
2166
2167         bio = fdc->bio;
2168         bp = bio->bio_buf;
2169         dev = bio->bio_driver_info;
2170
2171         /* XXX shouldn't this be cached somewhere?  */
2172         fdu = dkunit(dev);
2173         fd = devclass_get_softc(fd_devclass, fdu);
2174         if (fd->options & FDOPT_NORETRY)
2175                 goto fail;
2176
2177         switch (fdc->retry) {
2178         case 0: case 1: case 2:
2179                 fdc->state = SEEKCOMPLETE;
2180                 break;
2181         case 3: case 4: case 5:
2182                 fdc->state = STARTRECAL;
2183                 break;
2184         case 6:
2185                 fdc->state = RESETCTLR;
2186                 break;
2187         case 7:
2188                 break;
2189         default:
2190         fail:
2191                 {
2192                         int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2193
2194                         if (printerror) {
2195                                 /*
2196                                  * note: use the correct device for more
2197                                  * verbose error reporting.
2198                                  */
2199                                 diskerr(bio, dev,
2200                                         "hard error", LOG_PRINTF,
2201                                         fdc->fd->skip);
2202                         }
2203                         if (printerror) {
2204                                 if (fdc->flags & FDC_STAT_VALID)
2205                                         kprintf(
2206                         " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2207                                                fdc->status[0], NE7_ST0BITS,
2208                                                fdc->status[1], NE7_ST1BITS,
2209                                                fdc->status[2], NE7_ST2BITS,
2210                                                fdc->status[3], fdc->status[4],
2211                                                fdc->status[5]);
2212                                 else
2213                                         kprintf(" (No status)\n");
2214                         }
2215                 }
2216                 bp->b_flags |= B_ERROR;
2217                 bp->b_error = EIO;
2218                 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2219                 fdc->bio = NULL;
2220                 fdc->fd->skip = 0;
2221 #if 0
2222                 device_unbusy(fd->dev);
2223 #endif
2224                 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2225                 biodone(bio);
2226                 fdc->state = FINDWORK;
2227                 fdc->flags |= FDC_NEEDS_RESET;
2228                 fdc->fd = (fd_p) 0;
2229                 fdc->fdu = -1;
2230                 return (1);
2231         }
2232         fdc->retry++;
2233         return (1);
2234 }
2235
2236 static int
2237 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred)
2238 {
2239         fdu_t   fdu;
2240         fd_p    fd;
2241         struct buf *bp;
2242         int rv = 0;
2243         size_t fdblk;
2244
2245         fdu     = dkunit(dev);
2246         fd      = devclass_get_softc(fd_devclass, fdu);
2247         fdblk = 128 << fd->ft.secsize;
2248
2249         /* set up a buffer header for fdstrategy() */
2250         bp = getpbuf(NULL);
2251         bp->b_cmd = BUF_CMD_FORMAT;
2252
2253         /*
2254          * calculate a fake blkno, so fdstrategy() would initiate a
2255          * seek to the requested cylinder
2256          */
2257         bp->b_bio1.bio_offset = (off_t)(finfo->cyl * 
2258                 (fd->ft.sectrac * fd->ft.heads)
2259                 + finfo->head * fd->ft.sectrac) * fdblk;
2260         bp->b_bio1.bio_driver_info = dev;
2261         bp->b_bio1.bio_flags |= BIO_SYNC;
2262         bp->b_bio1.bio_done = biodone_sync;
2263
2264         bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2265         bp->b_data = (caddr_t)finfo;
2266
2267         /* now do the format */
2268         dev_dstrategy(dev, &bp->b_bio1);
2269
2270         /* ...and wait for it to complete */
2271         rv = biowait_timeout(&bp->b_bio1, "fdform", 20 * hz);
2272         if (rv == EWOULDBLOCK) {
2273                 /* timed out */
2274                 rv = EIO;
2275 #if 0
2276                 device_unbusy(fd->dev);
2277 #endif
2278                 biodone(&bp->b_bio1);
2279         }
2280         if (bp->b_flags & B_ERROR)
2281                 rv = bp->b_error;
2282         /*
2283          * allow the process to be swapped
2284          */
2285         relpbuf(bp, NULL);
2286         return rv;
2287 }
2288
2289 /*
2290  * TODO: don't allocate buffer on stack.
2291  */
2292
2293 static int
2294 fdioctl(struct dev_ioctl_args *ap)
2295 {
2296         cdev_t dev = ap->a_head.a_dev;
2297         fdu_t   fdu = dkunit(dev);
2298         fd_p    fd = devclass_get_softc(fd_devclass, fdu);
2299         struct fdc_status *fsp;
2300         int error = 0;
2301
2302         switch (ap->a_cmd) {
2303         case FD_FORM:
2304                 if ((ap->a_fflag & FWRITE) == 0)
2305                         error = EBADF;  /* must be opened for writing */
2306                 else if (((struct fd_formb *)ap->a_data)->format_version !=
2307                         FD_FORMAT_VERSION)
2308                         error = EINVAL; /* wrong version of formatting prog */
2309                 else
2310                         error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred);
2311                 break;
2312
2313         case FD_GTYPE:                  /* get drive type */
2314                 *(struct fd_type *)ap->a_data = fd->ft;
2315                 break;
2316
2317         case FD_STYPE:                  /* set drive type */
2318                 /* this is considered harmful; only allow for superuser */
2319                 if (priv_check_cred(ap->a_cred, PRIV_ROOT, 0) != 0)
2320                         return EPERM;
2321                 fd->ft = *(struct fd_type *)ap->a_data;
2322                 break;
2323
2324         case FD_GOPTS:                  /* get drive options */
2325                 *(int *)ap->a_data = fd->options;
2326                 break;
2327
2328         case FD_SOPTS:                  /* set drive options */
2329                 fd->options = *(int *)ap->a_data;
2330                 break;
2331
2332         case FD_GSTAT:
2333                 fsp = (struct fdc_status *)ap->a_data;
2334                 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2335                         return EINVAL;
2336                 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2337                 break;
2338
2339         default:
2340                 error = ENOTTY;
2341                 break;
2342         }
2343         return (error);
2344 }
2345
2346 /*
2347  * Hello emacs, these are the
2348  * Local Variables:
2349  *  c-indent-level:               8
2350  *  c-continued-statement-offset: 8
2351  *  c-continued-brace-offset:     0
2352  *  c-brace-offset:              -8
2353  *  c-brace-imaginary-offset:     0
2354  *  c-argdecl-indent:             8
2355  *  c-label-offset:              -8
2356  *  c++-hanging-braces:           1
2357  *  c++-access-specifier-offset: -8
2358  *  c++-empty-arglist-indent:     8
2359  *  c++-friend-offset:            0
2360  * End:
2361  */