Split off the PCCARD specific driver parts of fd and sio and remove last
[dragonfly.git] / sys / dev / disk / fd / fd.c
1 /*
2  * Copyright (c) 1990 The Regents of the University of California.
3  * All rights reserved.
4  *
5  * This code is derived from software contributed to Berkeley by
6  * Don Ahn.
7  *
8  * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu)
9  * aided by the Linux floppy driver modifications from David Bateman
10  * (dbateman@eng.uts.edu.au).
11  *
12  * Copyright (c) 1993, 1994 by
13  *  jc@irbs.UUCP (John Capo)
14  *  vak@zebub.msk.su (Serge Vakulenko)
15  *  ache@astral.msk.su (Andrew A. Chernov)
16  *
17  * Copyright (c) 1993, 1994, 1995 by
18  *  joerg_wunsch@uriah.sax.de (Joerg Wunsch)
19  *  dufault@hda.com (Peter Dufault)
20  *
21  * Copyright (c) 2001 Joerg Wunsch,
22  *  joerg_wunsch@uriah.sax.de (Joerg Wunsch)
23  *
24  * Redistribution and use in source and binary forms, with or without
25  * modification, are permitted provided that the following conditions
26  * are met:
27  * 1. Redistributions of source code must retain the above copyright
28  *    notice, this list of conditions and the following disclaimer.
29  * 2. Redistributions in binary form must reproduce the above copyright
30  *    notice, this list of conditions and the following disclaimer in the
31  *    documentation and/or other materials provided with the distribution.
32  * 3. All advertising materials mentioning features or use of this software
33  *    must display the following acknowledgement:
34  *      This product includes software developed by the University of
35  *      California, Berkeley and its contributors.
36  * 4. Neither the name of the University nor the names of its contributors
37  *    may be used to endorse or promote products derived from this software
38  *    without specific prior written permission.
39  *
40  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50  * SUCH DAMAGE.
51  *
52  *      from:   @(#)fd.c        7.4 (Berkeley) 5/25/91
53  * $FreeBSD: src/sys/isa/fd.c,v 1.176.2.8 2002/05/15 21:56:14 joerg Exp $
54  * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.12 2004/01/11 16:45:16 joerg Exp $
55  *
56  */
57
58 #include "opt_fdc.h"
59 #include "use_card.h"
60
61 #include <sys/param.h>
62 #include <sys/systm.h>
63 #include <sys/bootmaj.h>
64 #include <sys/kernel.h>
65 #include <sys/buf.h>
66 #include <sys/bus.h>
67 #include <sys/conf.h>
68 #include <sys/disklabel.h>
69 #include <sys/devicestat.h>
70 #include <sys/fcntl.h>
71 #include <sys/malloc.h>
72 #include <sys/module.h>
73 #include <sys/proc.h>
74 #include <sys/syslog.h>
75 #include <sys/device.h>
76
77 #include <sys/bus.h>
78 #include <machine/bus.h>
79 #include <sys/rman.h>
80
81 #include <sys/buf2.h>
82
83 #include <machine/clock.h>
84 #include <machine/ioctl_fd.h>
85 #include <machine/resource.h>
86 #include <machine/stdarg.h>
87
88 #include <bus/isa/isavar.h>
89 #include <bus/isa/isareg.h>
90 #include "fdreg.h"
91 #include "fdc.h"
92 #include <bus/isa/rtc.h>
93
94 /* misuse a flag to identify format operation */
95 #define B_FORMAT B_XXX
96
97 /* configuration flags */
98 #define FDC_PRETEND_D0  (1 << 0)        /* pretend drive 0 to be there */
99 #define FDC_NO_FIFO     (1 << 2)        /* do not enable FIFO  */
100
101 /* internally used only, not really from CMOS: */
102 #define RTCFDT_144M_PRETENDED   0x1000
103
104 /* error returns for fd_cmd() */
105 #define FD_FAILED -1
106 #define FD_NOT_VALID -2
107 #define FDC_ERRMAX      100     /* do not log more */
108 /*
109  * Stop retrying after this many DMA overruns.  Since each retry takes
110  * one revolution, with 300 rpm., 25 retries take approximately 10
111  * seconds which the read attempt will block in case the DMA overrun
112  * is persistent.
113  */
114 #define FDC_DMAOV_MAX   25
115
116 /*
117  * Timeout value for the PIO loops to wait until the FDC main status
118  * register matches our expectations (request for master, direction
119  * bit).  This is supposed to be a number of microseconds, although
120  * timing might actually not be very accurate.
121  *
122  * Timeouts of 100 msec are believed to be required for some broken
123  * (old) hardware.
124  */
125 #define FDSTS_TIMEOUT   100000
126
127 #define NUMTYPES 17
128 #define NUMDENS  (NUMTYPES - 7)
129
130 /* These defines (-1) must match index for fd_types */
131 #define F_TAPE_TYPE     0x020   /* bit for fd_types to indicate tape */
132 #define NO_TYPE         0       /* must match NO_TYPE in ft.c */
133 #define FD_1720         1
134 #define FD_1480         2
135 #define FD_1440         3
136 #define FD_1200         4
137 #define FD_820          5
138 #define FD_800          6
139 #define FD_720          7
140 #define FD_360          8
141 #define FD_640          9
142 #define FD_1232         10
143
144 #define FD_1480in5_25   11
145 #define FD_1440in5_25   12
146 #define FD_820in5_25    13
147 #define FD_800in5_25    14
148 #define FD_720in5_25    15
149 #define FD_360in5_25    16
150 #define FD_640in5_25    17
151
152
153 static struct fd_type fd_types[NUMTYPES] =
154 {
155 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
156 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
157 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
158 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /*  1.2M in HD 5.25/3.5 */
159 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /*  820K in HD 3.5in */
160 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /*  800K in HD 3.5in */
161 {  9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /*  720K in HD 3.5in */
162 {  9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /*  360K in DD 5.25in */
163 {  8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /*  640K in DD 5.25in */
164 {  8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
165
166 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
167 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
168 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /*  820K in HD 5.25in */
169 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /*  800K in HD 5.25in */
170 {  9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /*  720K in HD 5.25in */
171 {  9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /*  360K in HD 5.25in */
172 {  8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /*  640K in HD 5.25in */
173 };
174
175 #define DRVS_PER_CTLR 2         /* 2 floppies */
176
177 /***********************************************************************\
178 * Per controller structure.                                             *
179 \***********************************************************************/
180 devclass_t fdc_devclass;
181
182 /***********************************************************************\
183 * Per drive structure.                                                  *
184 * N per controller  (DRVS_PER_CTLR)                                     *
185 \***********************************************************************/
186 struct fd_data {
187         struct  fdc_data *fdc;  /* pointer to controller structure */
188         int     fdsu;           /* this units number on this controller */
189         int     type;           /* Drive type (FD_1440...) */
190         struct  fd_type *ft;    /* pointer to the type descriptor */
191         int     flags;
192 #define FD_OPEN         0x01    /* it's open            */
193 #define FD_ACTIVE       0x02    /* it's active          */
194 #define FD_MOTOR        0x04    /* motor should be on   */
195 #define FD_MOTOR_WAIT   0x08    /* motor coming up      */
196         int     skip;
197         int     hddrv;
198 #define FD_NO_TRACK -2
199         int     track;          /* where we think the head is */
200         int     options;        /* user configurable options, see ioctl_fd.h */
201         struct  callout_handle toffhandle;
202         struct  callout_handle tohandle;
203         struct  devstat device_stats;
204         device_t dev;
205         fdu_t   fdu;
206 };
207
208 struct fdc_ivars {
209         int     fdunit;
210 };
211 static devclass_t fd_devclass;
212
213 /***********************************************************************\
214 * Throughout this file the following conventions will be used:          *
215 * fd is a pointer to the fd_data struct for the drive in question       *
216 * fdc is a pointer to the fdc_data struct for the controller            *
217 * fdu is the floppy drive unit number                                   *
218 * fdcu is the floppy controller unit number                             *
219 * fdsu is the floppy drive unit number on that controller. (sub-unit)   *
220 \***********************************************************************/
221
222 /* internal functions */
223 static  void fdc_intr(void *);
224 static void set_motor(struct fdc_data *, int, int);
225 #  define TURNON 1
226 #  define TURNOFF 0
227 static timeout_t fd_turnoff;
228 static timeout_t fd_motor_on;
229 static void fd_turnon(struct fd_data *);
230 static void fdc_reset(fdc_p);
231 static int fd_in(struct fdc_data *, int *);
232 static int out_fdc(struct fdc_data *, int);
233 static void fdstart(struct fdc_data *);
234 static timeout_t fd_iotimeout;
235 static timeout_t fd_pseudointr;
236 static int fdstate(struct fdc_data *);
237 static int retrier(struct fdc_data *);
238 static int fdformat(dev_t, struct fd_formb *, struct thread *);
239
240 static int enable_fifo(fdc_p fdc);
241
242 static int fifo_threshold = 8;  /* XXX: should be accessible via sysctl */
243
244
245 #define DEVIDLE         0
246 #define FINDWORK        1
247 #define DOSEEK          2
248 #define SEEKCOMPLETE    3
249 #define IOCOMPLETE      4
250 #define RECALCOMPLETE   5
251 #define STARTRECAL      6
252 #define RESETCTLR       7
253 #define SEEKWAIT        8
254 #define RECALWAIT       9
255 #define MOTORWAIT       10
256 #define IOTIMEDOUT      11
257 #define RESETCOMPLETE   12
258 #define PIOREAD         13
259
260 #ifdef  FDC_DEBUG
261 static char const * const fdstates[] =
262 {
263 "DEVIDLE",
264 "FINDWORK",
265 "DOSEEK",
266 "SEEKCOMPLETE",
267 "IOCOMPLETE",
268 "RECALCOMPLETE",
269 "STARTRECAL",
270 "RESETCTLR",
271 "SEEKWAIT",
272 "RECALWAIT",
273 "MOTORWAIT",
274 "IOTIMEDOUT",
275 "RESETCOMPLETE",
276 "PIOREAD",
277 };
278
279 /* CAUTION: fd_debug causes huge amounts of logging output */
280 static int volatile fd_debug = 0;
281 #define TRACE0(arg) if(fd_debug) printf(arg)
282 #define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2)
283 #else /* FDC_DEBUG */
284 #define TRACE0(arg)
285 #define TRACE1(arg1, arg2)
286 #endif /* FDC_DEBUG */
287
288 void
289 fdout_wr(fdc_p fdc, u_int8_t v)
290 {
291         bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
292 }
293
294 static u_int8_t
295 fdsts_rd(fdc_p fdc)
296 {
297         return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
298 }
299
300 static void
301 fddata_wr(fdc_p fdc, u_int8_t v)
302 {
303         bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
304 }
305
306 static u_int8_t
307 fddata_rd(fdc_p fdc)
308 {
309         return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
310 }
311
312 static void
313 fdctl_wr_isa(fdc_p fdc, u_int8_t v)
314 {
315         bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
316 }
317
318 #if 0
319
320 static u_int8_t
321 fdin_rd(fdc_p fdc)
322 {
323         return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
324 }
325
326 #endif
327
328 static  d_open_t        Fdopen; /* NOTE, not fdopen */
329 static  d_close_t       fdclose;
330 static  d_ioctl_t       fdioctl;
331 static  d_strategy_t    fdstrategy;
332
333 static struct cdevsw fd_cdevsw = {
334         /* name */      "fd",
335         /* maj */       FD_CDEV_MAJOR,
336         /* flags */     D_DISK,
337         /* port */      NULL,
338         /* autoq */     0,
339
340         /* open */      Fdopen,
341         /* close */     fdclose,
342         /* read */      physread,
343         /* write */     physwrite,
344         /* ioctl */     fdioctl,
345         /* poll */      nopoll,
346         /* mmap */      nommap,
347         /* strategy */  fdstrategy,
348         /* dump */      nodump,
349         /* psize */     nopsize
350 };
351
352 static int
353 fdc_err(struct fdc_data *fdc, const char *s)
354 {
355         fdc->fdc_errs++;
356         if (s) {
357                 if (fdc->fdc_errs < FDC_ERRMAX)
358                         device_printf(fdc->fdc_dev, "%s", s);
359                 else if (fdc->fdc_errs == FDC_ERRMAX)
360                         device_printf(fdc->fdc_dev, "too many errors, not "
361                                                     "logging any more\n");
362         }
363
364         return FD_FAILED;
365 }
366
367 /*
368  * fd_cmd: Send a command to the chip.  Takes a varargs with this structure:
369  * Unit number,
370  * # of output bytes, output bytes as ints ...,
371  * # of input bytes, input bytes as ints ...
372  */
373 int
374 fd_cmd(struct fdc_data *fdc, int n_out, ...)
375 {
376         u_char cmd;
377         int n_in;
378         int n;
379         __va_list ap;
380
381         __va_start(ap, n_out);
382         cmd = (u_char)(__va_arg(ap, int));
383         __va_end(ap);
384         __va_start(ap, n_out);
385         for (n = 0; n < n_out; n++)
386         {
387                 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
388                 {
389                         char msg[50];
390                         snprintf(msg, sizeof(msg),
391                                 "cmd %x failed at out byte %d of %d\n",
392                                 cmd, n + 1, n_out);
393                         return fdc_err(fdc, msg);
394                 }
395         }
396         n_in = __va_arg(ap, int);
397         for (n = 0; n < n_in; n++)
398         {
399                 int *ptr = __va_arg(ap, int *);
400                 if (fd_in(fdc, ptr) < 0)
401                 {
402                         char msg[50];
403                         snprintf(msg, sizeof(msg),
404                                 "cmd %02x failed at in byte %d of %d\n",
405                                 cmd, n + 1, n_in);
406                         return fdc_err(fdc, msg);
407                 }
408         }
409
410         return 0;
411 }
412
413 static int 
414 enable_fifo(fdc_p fdc)
415 {
416         int i, j;
417
418         if ((fdc->flags & FDC_HAS_FIFO) == 0) {
419                 
420                 /*
421                  * XXX: 
422                  * Cannot use fd_cmd the normal way here, since
423                  * this might be an invalid command. Thus we send the
424                  * first byte, and check for an early turn of data directon.
425                  */
426                 
427                 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
428                         return fdc_err(fdc, "Enable FIFO failed\n");
429                 
430                 /* If command is invalid, return */
431                 j = FDSTS_TIMEOUT;
432                 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
433                        != NE7_RQM && j-- > 0) {
434                         if (i == (NE7_DIO | NE7_RQM)) {
435                                 fdc_reset(fdc);
436                                 return FD_FAILED;
437                         }
438                         DELAY(1);
439                 }
440                 if (j<0 || 
441                     fd_cmd(fdc, 3,
442                            0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
443                         fdc_reset(fdc);
444                         return fdc_err(fdc, "Enable FIFO failed\n");
445                 }
446                 fdc->flags |= FDC_HAS_FIFO;
447                 return 0;
448         }
449         if (fd_cmd(fdc, 4,
450                    I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
451                 return fdc_err(fdc, "Re-enable FIFO failed\n");
452         return 0;
453 }
454
455 static int
456 fd_sense_drive_status(fdc_p fdc, int *st3p)
457 {
458         int st3;
459
460         if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
461         {
462                 return fdc_err(fdc, "Sense Drive Status failed\n");
463         }
464         if (st3p)
465                 *st3p = st3;
466
467         return 0;
468 }
469
470 static int
471 fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
472 {
473         int cyl, st0, ret;
474
475         ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
476         if (ret) {
477                 (void)fdc_err(fdc,
478                               "sense intr err reading stat reg 0\n");
479                 return ret;
480         }
481
482         if (st0p)
483                 *st0p = st0;
484
485         if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
486                 /*
487                  * There doesn't seem to have been an interrupt.
488                  */
489                 return FD_NOT_VALID;
490         }
491
492         if (fd_in(fdc, &cyl) < 0) {
493                 return fdc_err(fdc, "can't get cyl num\n");
494         }
495
496         if (cylp)
497                 *cylp = cyl;
498
499         return 0;
500 }
501
502
503 static int
504 fd_read_status(fdc_p fdc, int fdsu)
505 {
506         int i, ret;
507
508         for (i = 0; i < 7; i++) {
509                 /*
510                  * XXX types are poorly chosen.  Only bytes can by read
511                  * from the hardware, but fdc->status[] wants u_ints and
512                  * fd_in() gives ints.
513                  */
514                 int status;
515
516                 ret = fd_in(fdc, &status);
517                 fdc->status[i] = status;
518                 if (ret != 0)
519                         break;
520         }
521
522         if (ret == 0)
523                 fdc->flags |= FDC_STAT_VALID;
524         else
525                 fdc->flags &= ~FDC_STAT_VALID;
526
527         return ret;
528 }
529
530 /****************************************************************************/
531 /*                      autoconfiguration stuff                             */
532 /****************************************************************************/
533
534 int
535 fdc_alloc_resources(struct fdc_data *fdc)
536 {
537         device_t dev;
538         int ispnp, ispcmcia;
539
540         dev = fdc->fdc_dev;
541         ispnp = (fdc->flags & FDC_ISPNP) != 0;
542         ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
543         fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
544         fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
545
546         /*
547          * On standard ISA, we don't just use an 8 port range
548          * (e.g. 0x3f0-0x3f7) since that covers an IDE control
549          * register at 0x3f6.
550          *
551          * Isn't PC hardware wonderful.
552          *
553          * The Y-E Data PCMCIA FDC doesn't have this problem, it
554          * uses the register with offset 6 for pseudo-DMA, and the
555          * one with offset 7 as control register.
556          */
557         fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
558                                              &fdc->rid_ioport, 0ul, ~0ul, 
559                                              ispcmcia ? 8 : (ispnp ? 1 : 6),
560                                              RF_ACTIVE);
561         if (fdc->res_ioport == 0) {
562                 device_printf(dev, "cannot reserve I/O port range\n");
563                 return ENXIO;
564         }
565         fdc->portt = rman_get_bustag(fdc->res_ioport);
566         fdc->porth = rman_get_bushandle(fdc->res_ioport);
567
568         if (!ispcmcia) {
569                 /*
570                  * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
571                  * and some at 0x3f0-0x3f5,0x3f7. We detect the former
572                  * by checking the size and adjust the port address
573                  * accordingly.
574                  */
575                 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
576                         fdc->port_off = -2;
577
578                 /*
579                  * Register the control port range as rid 1 if it
580                  * isn't there already. Most PnP BIOSen will have
581                  * already done this but non-PnP configurations don't.
582                  *
583                  * And some (!!) report 0x3f2-0x3f5 and completely
584                  * leave out the control register!  It seems that some
585                  * non-antique controller chips have a different
586                  * method of programming the transfer speed which
587                  * doesn't require the control register, but it's
588                  * mighty bogus as the chip still responds to the
589                  * address for the control register.
590                  */
591                 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
592                         u_long ctlstart;
593
594                         /* Find the control port, usually 0x3f7 */
595                         ctlstart = rman_get_start(fdc->res_ioport) +
596                                 fdc->port_off + 7;
597
598                         bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
599                 }
600
601                 /*
602                  * Now (finally!) allocate the control port.
603                  */
604                 fdc->rid_ctl = 1;
605                 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
606                                                   &fdc->rid_ctl,
607                                                   0ul, ~0ul, 1, RF_ACTIVE);
608                 if (fdc->res_ctl == 0) {
609                         device_printf(dev,
610                                       "cannot reserve control I/O port range\n");
611                         return ENXIO;
612                 }
613                 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
614                 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
615         }
616
617         fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
618                                           &fdc->rid_irq, 0ul, ~0ul, 1, 
619                                           RF_ACTIVE);
620         if (fdc->res_irq == 0) {
621                 device_printf(dev, "cannot reserve interrupt line\n");
622                 return ENXIO;
623         }
624
625         if ((fdc->flags & FDC_NODMA) == 0) {
626                 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
627                                                   &fdc->rid_drq, 0ul, ~0ul, 1, 
628                                                   RF_ACTIVE);
629                 if (fdc->res_drq == 0) {
630                         device_printf(dev, "cannot reserve DMA request line\n");
631                         return ENXIO;
632                 }
633                 fdc->dmachan = fdc->res_drq->r_start;
634         }
635
636         return 0;
637 }
638
639 void
640 fdc_release_resources(struct fdc_data *fdc)
641 {
642         device_t dev;
643
644         dev = fdc->fdc_dev;
645         if (fdc->res_irq != 0) {
646                 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
647                                         fdc->res_irq);
648                 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
649                                      fdc->res_irq);
650         }
651         if (fdc->res_ctl != 0) {
652                 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
653                                         fdc->res_ctl);
654                 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
655                                      fdc->res_ctl);
656         }
657         if (fdc->res_ioport != 0) {
658                 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
659                                         fdc->res_ioport);
660                 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
661                                      fdc->res_ioport);
662         }
663         if (fdc->res_drq != 0) {
664                 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
665                                         fdc->res_drq);
666                 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
667                                      fdc->res_drq);
668         }
669 }
670
671 /****************************************************************************/
672 /*                      autoconfiguration stuff                             */
673 /****************************************************************************/
674
675 static struct isa_pnp_id fdc_ids[] = {
676         {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
677         {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
678         {0}
679 };
680
681 int
682 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
683 {
684         struct fdc_ivars *ivars = device_get_ivars(child);
685
686         switch (which) {
687         case FDC_IVAR_FDUNIT:
688                 *result = ivars->fdunit;
689                 break;
690         default:
691                 return ENOENT;
692         }
693         return 0;
694 }
695
696 /*
697  * fdc controller section.
698  */
699 static int
700 fdc_probe(device_t dev)
701 {
702         int     error, ic_type;
703         struct  fdc_data *fdc;
704
705         fdc = device_get_softc(dev);
706         bzero(fdc, sizeof *fdc);
707         fdc->fdc_dev = dev;
708         fdc->fdctl_wr = fdctl_wr_isa;
709
710         /* Check pnp ids */
711         error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
712         if (error == ENXIO)
713                 return ENXIO;
714         if (error == 0)
715                 fdc->flags |= FDC_ISPNP;
716
717         /* Attempt to allocate our resources for the duration of the probe */
718         error = fdc_alloc_resources(fdc);
719         if (error)
720                 goto out;
721
722         /* First - lets reset the floppy controller */
723         fdout_wr(fdc, 0);
724         DELAY(100);
725         fdout_wr(fdc, FDO_FRST);
726
727         /* see if it can handle a command */
728         if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 
729                    NE7_SPEC_2(2, 0), 0)) {
730                 error = ENXIO;
731                 goto out;
732         }
733
734         if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
735                 ic_type = (u_char)ic_type;
736                 switch (ic_type) {
737                 case 0x80:
738                         device_set_desc(dev, "NEC 765 or clone");
739                         fdc->fdct = FDC_NE765;
740                         break;
741                 case 0x81:
742                         device_set_desc(dev, "Intel 82077 or clone");
743                         fdc->fdct = FDC_I82077;
744                         break;
745                 case 0x90:
746                         device_set_desc(dev, "NEC 72065B or clone");
747                         fdc->fdct = FDC_NE72065;
748                         break;
749                 default:
750                         device_set_desc(dev, "generic floppy controller");
751                         fdc->fdct = FDC_UNKNOWN;
752                         break;
753                 }
754         }
755
756 out:
757         fdc_release_resources(fdc);
758         return (error);
759 }
760
761 /*
762  * Add a child device to the fdc controller.  It will then be probed etc.
763  */
764 static void
765 fdc_add_child(device_t dev, const char *name, int unit)
766 {
767         int     disabled;
768         struct fdc_ivars *ivar;
769         device_t child;
770
771         ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT);
772         if (ivar == NULL)
773                 return;
774         bzero(ivar, sizeof *ivar);
775         if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
776                 ivar->fdunit = 0;
777         child = device_add_child(dev, name, unit);
778         if (child == NULL)
779                 return;
780         device_set_ivars(child, ivar);
781         if (resource_int_value(name, unit, "disabled", &disabled) == 0
782             && disabled != 0)
783                 device_disable(child);
784 }
785
786 int
787 fdc_attach(device_t dev)
788 {
789         struct  fdc_data *fdc;
790         int     i, error;
791
792         fdc = device_get_softc(dev);
793         error = fdc_alloc_resources(fdc);
794         if (error) {
795                 device_printf(dev, "cannot re-aquire resources\n");
796                 return error;
797         }
798         error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
799                                INTR_TYPE_BIO, fdc_intr, fdc, &fdc->fdc_intr);
800         if (error) {
801                 device_printf(dev, "cannot setup interrupt\n");
802                 return error;
803         }
804         fdc->fdcu = device_get_unit(dev);
805         fdc->flags |= FDC_ATTACHED;
806
807         if ((fdc->flags & FDC_NODMA) == 0) {
808                 /* Acquire the DMA channel forever, The driver will do the rest */
809                                 /* XXX should integrate with rman */
810                 isa_dma_acquire(fdc->dmachan);
811                 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
812         }
813         fdc->state = DEVIDLE;
814
815         /* reset controller, turn motor off, clear fdout mirror reg */
816         fdout_wr(fdc, ((fdc->fdout = 0)));
817         bufq_init(&fdc->head);
818
819         /*
820          * Probe and attach any children.  We should probably detect
821          * devices from the BIOS unless overridden.
822          */
823         for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
824              i != -1;
825              i = resource_query_string(i, "at", device_get_nameunit(dev)))
826                 fdc_add_child(dev, resource_query_name(i),
827                                resource_query_unit(i));
828
829         return (bus_generic_attach(dev));
830 }
831
832 int
833 fdc_print_child(device_t me, device_t child)
834 {
835         int retval = 0;
836
837         retval += bus_print_child_header(me, child);
838         retval += printf(" on %s drive %d\n", device_get_nameunit(me),
839                fdc_get_fdunit(child));
840         
841         return (retval);
842 }
843
844 static device_method_t fdc_methods[] = {
845         /* Device interface */
846         DEVMETHOD(device_probe,         fdc_probe),
847         DEVMETHOD(device_attach,        fdc_attach),
848         DEVMETHOD(device_detach,        bus_generic_detach),
849         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
850         DEVMETHOD(device_suspend,       bus_generic_suspend),
851         DEVMETHOD(device_resume,        bus_generic_resume),
852
853         /* Bus interface */
854         DEVMETHOD(bus_print_child,      fdc_print_child),
855         DEVMETHOD(bus_read_ivar,        fdc_read_ivar),
856         /* Our children never use any other bus interface methods. */
857
858         { 0, 0 }
859 };
860
861 static driver_t fdc_driver = {
862         "fdc",
863         fdc_methods,
864         sizeof(struct fdc_data)
865 };
866
867 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
868
869 /******************************************************************/
870 /*
871  * devices attached to the controller section.  
872  */
873 static int
874 fd_probe(device_t dev)
875 {
876         int     i;
877         u_int   fdt, st0, st3;
878         struct  fd_data *fd;
879         struct  fdc_data *fdc;
880         fdsu_t  fdsu;
881         static int fd_fifo = 0;
882
883         fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
884         fd = device_get_softc(dev);
885         fdc = device_get_softc(device_get_parent(dev));
886
887         bzero(fd, sizeof *fd);
888         fd->dev = dev;
889         fd->fdc = fdc;
890         fd->fdsu = fdsu;
891         fd->fdu = device_get_unit(dev);
892
893 #ifdef __i386__
894         /* look up what bios thinks we have */
895         switch (fd->fdu) {
896         case 0:
897                 if ((fdc->flags & FDC_ISPCMCIA))
898                         fdt = RTCFDT_144M;
899                 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
900                         fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
901                 else
902                         fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
903                 break;
904         case 1:
905                 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
906                 break;
907         default:
908                 fdt = RTCFDT_NONE;
909                 break;
910         }
911 #else
912         fdt = RTCFDT_144M;      /* XXX probably */
913 #endif
914
915         /* is there a unit? */
916         if (fdt == RTCFDT_NONE)
917                 return (ENXIO);
918
919         /* select it */
920         set_motor(fdc, fdsu, TURNON);
921         DELAY(1000000); /* 1 sec */
922
923         /* XXX This doesn't work before the first set_motor() */
924         if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
925             && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
926             && enable_fifo(fdc) == 0) {
927                 device_printf(device_get_parent(dev),
928                     "FIFO enabled, %d bytes threshold\n", fifo_threshold);
929         }
930         fd_fifo = 1;
931
932         if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
933             && (st3 & NE7_ST3_T0)) {
934                 /* if at track 0, first seek inwards */
935                 /* seek some steps: */
936                 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
937                 DELAY(300000); /* ...wait a moment... */
938                 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
939         }
940
941         /* If we're at track 0 first seek inwards. */
942         if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
943                 /* Seek some steps... */
944                 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
945                         /* ...wait a moment... */
946                         DELAY(300000);
947                         /* make ctrlr happy: */
948                         fd_sense_int(fdc, 0, 0);
949                 }
950         }
951
952         for (i = 0; i < 2; i++) {
953                 /*
954                  * we must recalibrate twice, just in case the
955                  * heads have been beyond cylinder 76, since most
956                  * FDCs still barf when attempting to recalibrate
957                  * more than 77 steps
958                  */
959                 /* go back to 0: */
960                 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
961                         /* a second being enough for full stroke seek*/
962                         DELAY(i == 0 ? 1000000 : 300000);
963
964                         /* anything responding? */
965                         if (fd_sense_int(fdc, &st0, 0) == 0 &&
966                             (st0 & NE7_ST0_EC) == 0)
967                                 break; /* already probed succesfully */
968                 }
969         }
970
971         set_motor(fdc, fdsu, TURNOFF);
972
973         if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
974                 return (ENXIO);
975
976         fd->track = FD_NO_TRACK;
977         fd->fdc = fdc;
978         fd->fdsu = fdsu;
979         fd->options = 0;
980         callout_handle_init(&fd->toffhandle);
981         callout_handle_init(&fd->tohandle);
982
983         switch (fdt) {
984         case RTCFDT_12M:
985                 device_set_desc(dev, "1200-KB 5.25\" drive");
986                 fd->type = FD_1200;
987                 break;
988         case RTCFDT_144M | RTCFDT_144M_PRETENDED:
989                 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
990                 fdt = RTCFDT_144M;
991                 fd->type = FD_1440;
992         case RTCFDT_144M:
993                 device_set_desc(dev, "1440-KB 3.5\" drive");
994                 fd->type = FD_1440;
995                 break;
996         case RTCFDT_288M:
997         case RTCFDT_288M_1:
998                 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
999                 fd->type = FD_1440;
1000                 break;
1001         case RTCFDT_360K:
1002                 device_set_desc(dev, "360-KB 5.25\" drive");
1003                 fd->type = FD_360;
1004                 break;
1005         case RTCFDT_720K:
1006                 printf("720-KB 3.5\" drive");
1007                 fd->type = FD_720;
1008                 break;
1009         default:
1010                 return (ENXIO);
1011         }
1012         return (0);
1013 }
1014
1015 static int
1016 fd_attach(device_t dev)
1017 {
1018         struct  fd_data *fd;
1019 #if 0
1020         int     i;
1021         int     mynor;
1022         int     typemynor;
1023         int     typesize;
1024 #endif
1025         static int cdevsw_add_done = 0;
1026
1027         fd = device_get_softc(dev);
1028
1029         if (!cdevsw_add_done) {
1030                 cdevsw_add(&fd_cdevsw); /* XXX */
1031                 cdevsw_add_done++;
1032         }
1033         make_dev(&fd_cdevsw, (fd->fdu << 6),
1034                 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu);
1035
1036 #if 0
1037         /* Other make_dev() go here. */
1038 #endif
1039
1040         /*
1041          * Export the drive to the devstat interface.
1042          */
1043         devstat_add_entry(&fd->device_stats, device_get_name(dev), 
1044                           device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1045                           DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1046                           DEVSTAT_PRIORITY_FD);
1047         return (0);
1048 }
1049
1050 static int
1051 fd_detach(device_t dev)
1052 {
1053         struct  fd_data *fd;
1054
1055         fd = device_get_softc(dev);
1056         untimeout(fd_turnoff, fd, fd->toffhandle);
1057
1058         return (0);
1059 }
1060
1061 static device_method_t fd_methods[] = {
1062         /* Device interface */
1063         DEVMETHOD(device_probe,         fd_probe),
1064         DEVMETHOD(device_attach,        fd_attach),
1065         DEVMETHOD(device_detach,        fd_detach),
1066         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
1067         DEVMETHOD(device_suspend,       bus_generic_suspend), /* XXX */
1068         DEVMETHOD(device_resume,        bus_generic_resume), /* XXX */
1069
1070         { 0, 0 }
1071 };
1072
1073 static driver_t fd_driver = {
1074         "fd",
1075         fd_methods,
1076         sizeof(struct fd_data)
1077 };
1078
1079 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1080
1081 /****************************************************************************/
1082 /*                            motor control stuff                           */
1083 /*              remember to not deselect the drive we're working on         */
1084 /****************************************************************************/
1085 static void
1086 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1087 {
1088         int fdout = fdc->fdout;
1089         int needspecify = 0;
1090
1091         if(turnon) {
1092                 fdout &= ~FDO_FDSEL;
1093                 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1094         } else
1095                 fdout &= ~(FDO_MOEN0 << fdsu);
1096
1097         if(!turnon
1098            && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1099                 /* gonna turn off the last drive, put FDC to bed */
1100                 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1101         else {
1102                 /* make sure controller is selected and specified */
1103                 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1104                         needspecify = 1;
1105                 fdout |= (FDO_FRST|FDO_FDMAEN);
1106         }
1107
1108         fdout_wr(fdc, fdout);
1109         fdc->fdout = fdout;
1110         TRACE1("[0x%x->FDOUT]", fdout);
1111
1112         if (needspecify) {
1113                 /*
1114                  * XXX
1115                  * special case: since we have just woken up the FDC
1116                  * from its sleep, we silently assume the command will
1117                  * be accepted, and do not test for a timeout
1118                  */
1119                 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1120                              NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1121                              0);
1122                 if (fdc->flags & FDC_HAS_FIFO)
1123                         (void) enable_fifo(fdc);
1124         }
1125 }
1126
1127 static void
1128 fd_turnoff(void *xfd)
1129 {
1130         int     s;
1131         fd_p fd = xfd;
1132
1133         TRACE1("[fd%d: turnoff]", fd->fdu);
1134
1135         s = splbio();
1136         /*
1137          * Don't turn off the motor yet if the drive is active.
1138          *
1139          * If we got here, this could only mean we missed an interrupt.
1140          * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1141          * after a controller reset.  Just schedule a pseudo-interrupt
1142          * so the state machine gets re-entered.
1143          */
1144         if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1145                 fdc_intr(fd->fdc);
1146                 splx(s);
1147                 return;
1148         }
1149
1150         fd->flags &= ~FD_MOTOR;
1151         set_motor(fd->fdc, fd->fdsu, TURNOFF);
1152         splx(s);
1153 }
1154
1155 static void
1156 fd_motor_on(void *xfd)
1157 {
1158         int     s;
1159         fd_p fd = xfd;
1160
1161         s = splbio();
1162         fd->flags &= ~FD_MOTOR_WAIT;
1163         if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1164         {
1165                 fdc_intr(fd->fdc);
1166         }
1167         splx(s);
1168 }
1169
1170 static void
1171 fd_turnon(fd_p fd)
1172 {
1173         if(!(fd->flags & FD_MOTOR))
1174         {
1175                 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1176                 set_motor(fd->fdc, fd->fdsu, TURNON);
1177                 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */
1178         }
1179 }
1180
1181 static void
1182 fdc_reset(fdc_p fdc)
1183 {
1184         /* Try a reset, keep motor on */
1185         fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1186         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1187         DELAY(100);
1188         /* enable FDC, but defer interrupts a moment */
1189         fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1190         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1191         DELAY(100);
1192         fdout_wr(fdc, fdc->fdout);
1193         TRACE1("[0x%x->FDOUT]", fdc->fdout);
1194
1195         /* XXX after a reset, silently believe the FDC will accept commands */
1196         (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1197                      NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1198                      0);
1199         if (fdc->flags & FDC_HAS_FIFO)
1200                 (void) enable_fifo(fdc);
1201 }
1202
1203 /****************************************************************************/
1204 /*                             fdc in/out                                   */
1205 /****************************************************************************/
1206 /*
1207  * FDC IO functions, take care of the main status register, timeout
1208  * in case the desired status bits are never set.
1209  *
1210  * These PIO loops initially start out with short delays between
1211  * each iteration in the expectation that the required condition
1212  * is usually met quickly, so it can be handled immediately.  After
1213  * about 1 ms, stepping is increased to achieve a better timing
1214  * accuracy in the calls to DELAY().
1215  */
1216 static int
1217 fd_in(struct fdc_data *fdc, int *ptr)
1218 {
1219         int i, j, step;
1220
1221         for (j = 0, step = 1;
1222             (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1223             j < FDSTS_TIMEOUT;
1224             j += step) {
1225                 if (i == NE7_RQM)
1226                         return (fdc_err(fdc, "ready for output in input\n"));
1227                 if (j == 1000)
1228                         step = 1000;
1229                 DELAY(step);
1230         }
1231         if (j >= FDSTS_TIMEOUT)
1232                 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1233 #ifdef  FDC_DEBUG
1234         i = fddata_rd(fdc);
1235         TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1236         *ptr = i;
1237         return (0);
1238 #else   /* !FDC_DEBUG */
1239         i = fddata_rd(fdc);
1240         if (ptr)
1241                 *ptr = i;
1242         return (0);
1243 #endif  /* FDC_DEBUG */
1244 }
1245
1246 static int
1247 out_fdc(struct fdc_data *fdc, int x)
1248 {
1249         int i, j, step;
1250
1251         for (j = 0, step = 1;
1252             (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1253             j < FDSTS_TIMEOUT;
1254             j += step) {
1255                 if (i == (NE7_DIO|NE7_RQM))
1256                         return (fdc_err(fdc, "ready for input in output\n"));
1257                 if (j == 1000)
1258                         step = 1000;
1259                 DELAY(step);
1260         }
1261         if (j >= FDSTS_TIMEOUT)
1262                 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1263
1264         /* Send the command and return */
1265         fddata_wr(fdc, x);
1266         TRACE1("[0x%x->FDDATA]", x);
1267         return (0);
1268 }
1269
1270 /****************************************************************************/
1271 /*                           fdopen/fdclose                                 */
1272 /****************************************************************************/
1273 int
1274 Fdopen(dev_t dev, int flags, int mode, struct thread *td)
1275 {
1276         fdu_t fdu = FDUNIT(minor(dev));
1277         int type = FDTYPE(minor(dev));
1278         fd_p    fd;
1279         fdc_p   fdc;
1280
1281         /* check bounds */
1282         if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1283                 return (ENXIO);
1284         fdc = fd->fdc;
1285         if ((fdc == NULL) || (fd->type == NO_TYPE))
1286                 return (ENXIO);
1287         if (type > NUMDENS)
1288                 return (ENXIO);
1289         if (type == 0)
1290                 type = fd->type;
1291         else {
1292                 /*
1293                  * For each type of basic drive, make sure we are trying
1294                  * to open a type it can do,
1295                  */
1296                 if (type != fd->type) {
1297                         switch (fd->type) {
1298                         case FD_360:
1299                                 return (ENXIO);
1300                         case FD_720:
1301                                 if (   type != FD_820
1302                                     && type != FD_800
1303                                     && type != FD_640
1304                                    )
1305                                         return (ENXIO);
1306                                 break;
1307                         case FD_1200:
1308                                 switch (type) {
1309                                 case FD_1480:
1310                                         type = FD_1480in5_25;
1311                                         break;
1312                                 case FD_1440:
1313                                         type = FD_1440in5_25;
1314                                         break;
1315                                 case FD_1232:
1316                                         break;
1317                                 case FD_820:
1318                                         type = FD_820in5_25;
1319                                         break;
1320                                 case FD_800:
1321                                         type = FD_800in5_25;
1322                                         break;
1323                                 case FD_720:
1324                                         type = FD_720in5_25;
1325                                         break;
1326                                 case FD_640:
1327                                         type = FD_640in5_25;
1328                                         break;
1329                                 case FD_360:
1330                                         type = FD_360in5_25;
1331                                         break;
1332                                 default:
1333                                         return(ENXIO);
1334                                 }
1335                                 break;
1336                         case FD_1440:
1337                                 if (   type != FD_1720
1338                                     && type != FD_1480
1339                                     && type != FD_1200
1340                                     && type != FD_820
1341                                     && type != FD_800
1342                                     && type != FD_720
1343                                     && type != FD_640
1344                                     )
1345                                         return(ENXIO);
1346                                 break;
1347                         }
1348                 }
1349         }
1350         fd->ft = fd_types + type - 1;
1351         fd->flags |= FD_OPEN;
1352         /*
1353          * Clearing the DMA overrun counter at open time is a bit messy.
1354          * Since we're only managing one counter per controller, opening
1355          * the second drive could mess it up.  Anyway, if the DMA overrun
1356          * condition is really persistent, it will eventually time out
1357          * still.  OTOH, clearing it here will ensure we'll at least start
1358          * trying again after a previous (maybe even long ago) failure.
1359          * Also, this is merely a stop-gap measure only that should not
1360          * happen during normal operation, so we can tolerate it to be a
1361          * bit sloppy about this.
1362          */
1363         fdc->dma_overruns = 0;
1364
1365         return 0;
1366 }
1367
1368 int
1369 fdclose(dev_t dev, int flags, int mode, struct thread *td)
1370 {
1371         fdu_t fdu = FDUNIT(minor(dev));
1372         struct fd_data *fd;
1373
1374         fd = devclass_get_softc(fd_devclass, fdu);
1375         fd->flags &= ~FD_OPEN;
1376         fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1377
1378         return (0);
1379 }
1380
1381 /****************************************************************************/
1382 /*                               fdstrategy                                 */
1383 /****************************************************************************/
1384 void
1385 fdstrategy(struct buf *bp)
1386 {
1387         unsigned nblocks, blknum, cando;
1388         int     s;
1389         fdu_t   fdu;
1390         fdc_p   fdc;
1391         fd_p    fd;
1392         size_t  fdblk;
1393
1394         fdu = FDUNIT(minor(bp->b_dev));
1395         fd = devclass_get_softc(fd_devclass, fdu);
1396         if (fd == 0)
1397                 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1398                       (u_long)major(bp->b_dev), (u_long)minor(bp->b_dev));
1399         fdc = fd->fdc;
1400         if (fd->type == NO_TYPE) {
1401                 bp->b_error = ENXIO;
1402                 bp->b_flags |= B_ERROR;
1403                 goto bad;
1404         };
1405
1406         fdblk = 128 << (fd->ft->secsize);
1407         if (!(bp->b_flags & B_FORMAT)) {
1408                 if (bp->b_blkno < 0) {
1409                         printf(
1410                 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
1411                                fdu, (u_long)bp->b_blkno, bp->b_bcount);
1412                         bp->b_error = EINVAL;
1413                         bp->b_flags |= B_ERROR;
1414                         goto bad;
1415                 }
1416                 if ((bp->b_bcount % fdblk) != 0) {
1417                         bp->b_error = EINVAL;
1418                         bp->b_flags |= B_ERROR;
1419                         goto bad;
1420                 }
1421         }
1422
1423         /*
1424          * Set up block calculations.
1425          */
1426         if (bp->b_blkno > 20000000) {
1427                 /*
1428                  * Reject unreasonably high block number, prevent the
1429                  * multiplication below from overflowing.
1430                  */
1431                 bp->b_error = EINVAL;
1432                 bp->b_flags |= B_ERROR;
1433                 goto bad;
1434         }
1435         blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk;
1436         nblocks = fd->ft->size;
1437         bp->b_resid = 0;
1438         if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1439                 if (blknum <= nblocks) {
1440                         cando = (nblocks - blknum) * fdblk;
1441                         bp->b_resid = bp->b_bcount - cando;
1442                         if (cando == 0)
1443                                 goto bad;       /* not actually bad but EOF */
1444                 } else {
1445                         bp->b_error = EINVAL;
1446                         bp->b_flags |= B_ERROR;
1447                         goto bad;
1448                 }
1449         }
1450         bp->b_pblkno = bp->b_blkno;
1451         s = splbio();
1452         bufqdisksort(&fdc->head, bp);
1453         untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */
1454
1455         /* Tell devstat we are starting on the transaction */
1456         devstat_start_transaction(&fd->device_stats);
1457         device_busy(fd->dev);
1458
1459         fdstart(fdc);
1460         splx(s);
1461         return;
1462
1463 bad:
1464         biodone(bp);
1465 }
1466
1467 /***************************************************************\
1468 *                               fdstart                         *
1469 * We have just queued something.. if the controller is not busy *
1470 * then simulate the case where it has just finished a command   *
1471 * So that it (the interrupt routine) looks on the queue for more*
1472 * work to do and picks up what we just added.                   *
1473 * If the controller is already busy, we need do nothing, as it  *
1474 * will pick up our work when the present work completes         *
1475 \***************************************************************/
1476 static void
1477 fdstart(struct fdc_data *fdc)
1478 {
1479         int s;
1480
1481         s = splbio();
1482         if(fdc->state == DEVIDLE)
1483         {
1484                 fdc_intr(fdc);
1485         }
1486         splx(s);
1487 }
1488
1489 static void
1490 fd_iotimeout(void *xfdc)
1491 {
1492         fdc_p fdc;
1493         int s;
1494
1495         fdc = xfdc;
1496         TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1497
1498         /*
1499          * Due to IBM's brain-dead design, the FDC has a faked ready
1500          * signal, hardwired to ready == true. Thus, any command
1501          * issued if there's no diskette in the drive will _never_
1502          * complete, and must be aborted by resetting the FDC.
1503          * Many thanks, Big Blue!
1504          * The FDC must not be reset directly, since that would
1505          * interfere with the state machine.  Instead, pretend that
1506          * the command completed but was invalid.  The state machine
1507          * will reset the FDC and retry once.
1508          */
1509         s = splbio();
1510         fdc->status[0] = NE7_ST0_IC_IV;
1511         fdc->flags &= ~FDC_STAT_VALID;
1512         fdc->state = IOTIMEDOUT;
1513         fdc_intr(fdc);
1514         splx(s);
1515 }
1516
1517 /* just ensure it has the right spl */
1518 static void
1519 fd_pseudointr(void *xfdc)
1520 {
1521         int     s;
1522
1523         s = splbio();
1524         fdc_intr(xfdc);
1525         splx(s);
1526 }
1527
1528 /***********************************************************************\
1529 *                                 fdintr                                *
1530 * keep calling the state machine until it returns a 0                   *
1531 * ALWAYS called at SPLBIO                                               *
1532 \***********************************************************************/
1533 static void
1534 fdc_intr(void *xfdc)
1535 {
1536         fdc_p fdc = xfdc;
1537         while(fdstate(fdc))
1538                 ;
1539 }
1540
1541 /*
1542  * magic pseudo-DMA initialization for YE FDC. Sets count and
1543  * direction
1544  */
1545 #define SET_BCDR(fdc,wr,cnt,port) \
1546         bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port,  \
1547             ((cnt)-1) & 0xff);                                           \
1548         bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1549             ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1550
1551 /*
1552  * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1553  */
1554 static int fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count)
1555 {
1556         u_char *cptr = (u_char *)addr;
1557
1558         if (flags & B_READ) {
1559                 if (fdc->state != PIOREAD) {
1560                         fdc->state = PIOREAD;
1561                         return(0);
1562                 };
1563                 SET_BCDR(fdc, 0, count, 0);
1564                 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1565                     FDC_YE_DATAPORT, cptr, count);
1566         } else {
1567                 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1568                     FDC_YE_DATAPORT, cptr, count);
1569                 SET_BCDR(fdc, 0, count, 0);
1570         };
1571         return(1);
1572 }
1573
1574 /***********************************************************************\
1575 * The controller state machine.                                         *
1576 * if it returns a non zero value, it should be called again immediatly  *
1577 \***********************************************************************/
1578 static int
1579 fdstate(fdc_p fdc)
1580 {
1581         int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1582         unsigned blknum = 0, b_cylinder = 0;
1583         fdu_t fdu = fdc->fdu;
1584         fd_p fd;
1585         struct buf *bp;
1586         struct fd_formb *finfo = NULL;
1587         size_t fdblk;
1588
1589         bp = fdc->bp;
1590         if (bp == NULL) {
1591                 bp = bufq_first(&fdc->head);
1592                 if (bp != NULL) {
1593                         bufq_remove(&fdc->head, bp);
1594                         fdc->bp = bp;
1595                 }
1596         }
1597         if (bp == NULL) {
1598                 /***********************************************\
1599                 * nothing left for this controller to do        *
1600                 * Force into the IDLE state,                    *
1601                 \***********************************************/
1602                 fdc->state = DEVIDLE;
1603                 if (fdc->fd) {
1604                         device_printf(fdc->fdc_dev,
1605                             "unexpected valid fd pointer\n");
1606                         fdc->fd = (fd_p) 0;
1607                         fdc->fdu = -1;
1608                 }
1609                 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1610                 return (0);
1611         }
1612         fdu = FDUNIT(minor(bp->b_dev));
1613         fd = devclass_get_softc(fd_devclass, fdu);
1614         fdblk = 128 << fd->ft->secsize;
1615         if (fdc->fd && (fd != fdc->fd))
1616                 device_printf(fd->dev, "confused fd pointers\n");
1617         read = bp->b_flags & B_READ;
1618         format = bp->b_flags & B_FORMAT;
1619         if (format) {
1620                 finfo = (struct fd_formb *)bp->b_data;
1621                 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1622                         - (char *)finfo;
1623         }
1624         if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1625                 blknum = (unsigned) bp->b_pblkno * DEV_BSIZE/fdblk +
1626                         fd->skip/fdblk;
1627                 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1628         }
1629         TRACE1("fd%d", fdu);
1630         TRACE1("[%s]", fdstates[fdc->state]);
1631         TRACE1("(0x%x)", fd->flags);
1632         untimeout(fd_turnoff, fd, fd->toffhandle);
1633         fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz);
1634         switch (fdc->state)
1635         {
1636         case DEVIDLE:
1637         case FINDWORK:  /* we have found new work */
1638                 fdc->retry = 0;
1639                 fd->skip = 0;
1640                 fdc->fd = fd;
1641                 fdc->fdu = fdu;
1642                 fdc->fdctl_wr(fdc, fd->ft->trans);
1643                 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1644                 /*******************************************************\
1645                 * If the next drive has a motor startup pending, then   *
1646                 * it will start up in its own good time         *
1647                 \*******************************************************/
1648                 if(fd->flags & FD_MOTOR_WAIT) {
1649                         fdc->state = MOTORWAIT;
1650                         return (0); /* come back later */
1651                 }
1652                 /*******************************************************\
1653                 * Maybe if it's not starting, it SHOULD be starting     *
1654                 \*******************************************************/
1655                 if (!(fd->flags & FD_MOTOR))
1656                 {
1657                         fdc->state = MOTORWAIT;
1658                         fd_turnon(fd);
1659                         return (0);
1660                 }
1661                 else    /* at least make sure we are selected */
1662                 {
1663                         set_motor(fdc, fd->fdsu, TURNON);
1664                 }
1665                 if (fdc->flags & FDC_NEEDS_RESET) {
1666                         fdc->state = RESETCTLR;
1667                         fdc->flags &= ~FDC_NEEDS_RESET;
1668                 } else
1669                         fdc->state = DOSEEK;
1670                 break;
1671         case DOSEEK:
1672                 if (b_cylinder == (unsigned)fd->track)
1673                 {
1674                         fdc->state = SEEKCOMPLETE;
1675                         break;
1676                 }
1677                 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1678                            fd->fdsu, b_cylinder * fd->ft->steptrac,
1679                            0))
1680                 {
1681                         /*
1682                          * seek command not accepted, looks like
1683                          * the FDC went off to the Saints...
1684                          */
1685                         fdc->retry = 6; /* try a reset */
1686                         return(retrier(fdc));
1687                 }
1688                 fd->track = FD_NO_TRACK;
1689                 fdc->state = SEEKWAIT;
1690                 return(0);      /* will return later */
1691         case SEEKWAIT:
1692                 /* allow heads to settle */
1693                 timeout(fd_pseudointr, fdc, hz / 16);
1694                 fdc->state = SEEKCOMPLETE;
1695                 return(0);      /* will return later */
1696         case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1697                 /* Make sure seek really happened*/
1698                 if(fd->track == FD_NO_TRACK) {
1699                         int descyl = b_cylinder * fd->ft->steptrac;
1700                         do {
1701                                 /*
1702                                  * This might be a "ready changed" interrupt,
1703                                  * which cannot really happen since the
1704                                  * RDY pin is hardwired to + 5 volts.  This
1705                                  * generally indicates a "bouncing" intr
1706                                  * line, so do one of the following:
1707                                  *
1708                                  * When running on an enhanced FDC that is
1709                                  * known to not go stuck after responding
1710                                  * with INVALID, fetch all interrupt states
1711                                  * until seeing either an INVALID or a
1712                                  * real interrupt condition.
1713                                  *
1714                                  * When running on a dumb old NE765, give
1715                                  * up immediately.  The controller will
1716                                  * provide up to four dummy RC interrupt
1717                                  * conditions right after reset (for the
1718                                  * corresponding four drives), so this is
1719                                  * our only chance to get notice that it
1720                                  * was not the FDC that caused the interrupt.
1721                                  */
1722                                 if (fd_sense_int(fdc, &st0, &cyl)
1723                                     == FD_NOT_VALID)
1724                                         return 0;
1725                                 if(fdc->fdct == FDC_NE765
1726                                    && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1727                                         return 0; /* hope for a real intr */
1728                         } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1729
1730                         if (0 == descyl) {
1731                                 int failed = 0;
1732                                 /*
1733                                  * seek to cyl 0 requested; make sure we are
1734                                  * really there
1735                                  */
1736                                 if (fd_sense_drive_status(fdc, &st3))
1737                                         failed = 1;
1738                                 if ((st3 & NE7_ST3_T0) == 0) {
1739                                         printf(
1740                 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1741                                                fdu, st3, NE7_ST3BITS);
1742                                         failed = 1;
1743                                 }
1744
1745                                 if (failed) {
1746                                         if(fdc->retry < 3)
1747                                                 fdc->retry = 3;
1748                                         return (retrier(fdc));
1749                                 }
1750                         }
1751
1752                         if (cyl != descyl) {
1753                                 printf(
1754                 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1755                                        fdu, descyl, cyl, st0);
1756                                 if (fdc->retry < 3)
1757                                         fdc->retry = 3;
1758                                 return (retrier(fdc));
1759                         }
1760                 }
1761
1762                 fd->track = b_cylinder;
1763                 if (!(fdc->flags & FDC_NODMA))
1764                         isa_dmastart(bp->b_flags, bp->b_data+fd->skip,
1765                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
1766                 sectrac = fd->ft->sectrac;
1767                 sec = blknum %  (sectrac * fd->ft->heads);
1768                 head = sec / sectrac;
1769                 sec = sec % sectrac + 1;
1770                 fd->hddrv = ((head&1)<<2)+fdu;
1771
1772                 if(format || !read)
1773                 {
1774                         /* make sure the drive is writable */
1775                         if(fd_sense_drive_status(fdc, &st3) != 0)
1776                         {
1777                                 /* stuck controller? */
1778                                 if (!(fdc->flags & FDC_NODMA))
1779                                         isa_dmadone(bp->b_flags,
1780                                                     bp->b_data + fd->skip,
1781                                                     format ? bp->b_bcount : fdblk,
1782                                                     fdc->dmachan);
1783                                 fdc->retry = 6; /* reset the beast */
1784                                 return (retrier(fdc));
1785                         }
1786                         if(st3 & NE7_ST3_WP)
1787                         {
1788                                 /*
1789                                  * XXX YES! this is ugly.
1790                                  * in order to force the current operation
1791                                  * to fail, we will have to fake an FDC
1792                                  * error - all error handling is done
1793                                  * by the retrier()
1794                                  */
1795                                 fdc->status[0] = NE7_ST0_IC_AT;
1796                                 fdc->status[1] = NE7_ST1_NW;
1797                                 fdc->status[2] = 0;
1798                                 fdc->status[3] = fd->track;
1799                                 fdc->status[4] = head;
1800                                 fdc->status[5] = sec;
1801                                 fdc->retry = 8; /* break out immediately */
1802                                 fdc->state = IOTIMEDOUT; /* not really... */
1803                                 return (1);
1804                         }
1805                 }
1806
1807                 if (format) {
1808                         if (fdc->flags & FDC_NODMA) {
1809                                 /*
1810                                  * This seems to be necessary for
1811                                  * whatever obscure reason; if we omit
1812                                  * it, we end up filling the sector ID
1813                                  * fields of the newly formatted track
1814                                  * entirely with garbage, causing
1815                                  * `wrong cylinder' errors all over
1816                                  * the place when trying to read them
1817                                  * back.
1818                                  *
1819                                  * Umpf.
1820                                  */
1821                                 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1822
1823                                 (void)fdcpio(fdc,bp->b_flags,
1824                                         bp->b_data+fd->skip,
1825                                         bp->b_bcount);
1826
1827                         }
1828                         /* formatting */
1829                         if(fd_cmd(fdc, 6,  NE7CMD_FORMAT, head << 2 | fdu,
1830                                   finfo->fd_formb_secshift,
1831                                   finfo->fd_formb_nsecs,
1832                                   finfo->fd_formb_gaplen,
1833                                   finfo->fd_formb_fillbyte, 0)) {
1834                                 /* controller fell over */
1835                                 if (!(fdc->flags & FDC_NODMA))
1836                                         isa_dmadone(bp->b_flags,
1837                                                     bp->b_data + fd->skip,
1838                                                     format ? bp->b_bcount : fdblk,
1839                                                     fdc->dmachan);
1840                                 fdc->retry = 6;
1841                                 return (retrier(fdc));
1842                         }
1843                 } else {
1844                         if (fdc->flags & FDC_NODMA) {
1845                                 /*
1846                                  * this seems to be necessary even when
1847                                  * reading data
1848                                  */
1849                                 SET_BCDR(fdc, 1, fdblk, 0);
1850
1851                                 /*
1852                                  * perform the write pseudo-DMA before
1853                                  * the WRITE command is sent
1854                                  */
1855                                 if (!read)
1856                                         (void)fdcpio(fdc,bp->b_flags,
1857                                             bp->b_data+fd->skip,
1858                                             fdblk);
1859                         }
1860                         if (fd_cmd(fdc, 9,
1861                                    (read ? NE7CMD_READ : NE7CMD_WRITE),
1862                                    head << 2 | fdu,  /* head & unit */
1863                                    fd->track,        /* track */
1864                                    head,
1865                                    sec,              /* sector + 1 */
1866                                    fd->ft->secsize,  /* sector size */
1867                                    sectrac,          /* sectors/track */
1868                                    fd->ft->gap,      /* gap size */
1869                                    fd->ft->datalen,  /* data length */
1870                                    0)) {
1871                                 /* the beast is sleeping again */
1872                                 if (!(fdc->flags & FDC_NODMA))
1873                                         isa_dmadone(bp->b_flags,
1874                                                     bp->b_data + fd->skip,
1875                                                     format ? bp->b_bcount : fdblk,
1876                                                     fdc->dmachan);
1877                                 fdc->retry = 6;
1878                                 return (retrier(fdc));
1879                         }
1880                 }
1881                 if (fdc->flags & FDC_NODMA)
1882                         /*
1883                          * if this is a read, then simply await interrupt
1884                          * before performing PIO
1885                          */
1886                         if (read && !fdcpio(fdc,bp->b_flags,
1887                             bp->b_data+fd->skip,fdblk)) {
1888                                 fd->tohandle = timeout(fd_iotimeout, fdc, hz);
1889                                 return(0);      /* will return later */
1890                         };
1891
1892                 /*
1893                  * write (or format) operation will fall through and
1894                  * await completion interrupt
1895                  */
1896                 fdc->state = IOCOMPLETE;
1897                 fd->tohandle = timeout(fd_iotimeout, fdc, hz);
1898                 return (0);     /* will return later */
1899         case PIOREAD:
1900                 /* 
1901                  * actually perform the PIO read.  The IOCOMPLETE case
1902                  * removes the timeout for us.  
1903                  */
1904                 (void)fdcpio(fdc,bp->b_flags,bp->b_data+fd->skip,fdblk);
1905                 fdc->state = IOCOMPLETE;
1906                 /* FALLTHROUGH */
1907         case IOCOMPLETE: /* IO DONE, post-analyze */
1908                 untimeout(fd_iotimeout, fdc, fd->tohandle);
1909
1910                 if (fd_read_status(fdc, fd->fdsu)) {
1911                         if (!(fdc->flags & FDC_NODMA))
1912                                 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1913                                             format ? bp->b_bcount : fdblk,
1914                                             fdc->dmachan);
1915                         if (fdc->retry < 6)
1916                                 fdc->retry = 6; /* force a reset */
1917                         return (retrier(fdc));
1918                 }
1919
1920                 fdc->state = IOTIMEDOUT;
1921
1922                 /* FALLTHROUGH */
1923
1924         case IOTIMEDOUT:
1925                 if (!(fdc->flags & FDC_NODMA))
1926                         isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1927                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
1928                 if (fdc->status[0] & NE7_ST0_IC) {
1929                         if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1930                             && fdc->status[1] & NE7_ST1_OR) {
1931                                 /*
1932                                  * DMA overrun. Someone hogged the bus and
1933                                  * didn't release it in time for the next
1934                                  * FDC transfer.
1935                                  *
1936                                  * We normally restart this without bumping
1937                                  * the retry counter.  However, in case
1938                                  * something is seriously messed up (like
1939                                  * broken hardware), we rather limit the
1940                                  * number of retries so the IO operation
1941                                  * doesn't block indefinately.
1942                                  */
1943                                 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
1944                                         fdc->state = SEEKCOMPLETE;
1945                                         return (1);
1946                                 } /* else fall through */
1947                         }
1948                         if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
1949                                 && fdc->retry < 6)
1950                                 fdc->retry = 6; /* force a reset */
1951                         else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1952                                 && fdc->status[2] & NE7_ST2_WC
1953                                 && fdc->retry < 3)
1954                                 fdc->retry = 3; /* force recalibrate */
1955                         return (retrier(fdc));
1956                 }
1957                 /* All OK */
1958                 /* Operation successful, retry DMA overruns again next time. */
1959                 fdc->dma_overruns = 0;
1960                 fd->skip += fdblk;
1961                 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
1962                         /* set up next transfer */
1963                         fdc->state = DOSEEK;
1964                 } else {
1965                         /* ALL DONE */
1966                         fd->skip = 0;
1967                         fdc->bp = NULL;
1968                         device_unbusy(fd->dev);
1969                         devstat_end_transaction_buf(&fd->device_stats, bp);
1970                         biodone(bp);
1971                         fdc->fd = (fd_p) 0;
1972                         fdc->fdu = -1;
1973                         fdc->state = FINDWORK;
1974                 }
1975                 return (1);
1976         case RESETCTLR:
1977                 fdc_reset(fdc);
1978                 fdc->retry++;
1979                 fdc->state = RESETCOMPLETE;
1980                 return (0);
1981         case RESETCOMPLETE:
1982                 /*
1983                  * Discard all the results from the reset so that they
1984                  * can't cause an unexpected interrupt later.
1985                  */
1986                 for (i = 0; i < 4; i++)
1987                         (void)fd_sense_int(fdc, &st0, &cyl);
1988                 fdc->state = STARTRECAL;
1989                 /* Fall through. */
1990         case STARTRECAL:
1991                 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
1992                         /* arrgl */
1993                         fdc->retry = 6;
1994                         return (retrier(fdc));
1995                 }
1996                 fdc->state = RECALWAIT;
1997                 return (0);     /* will return later */
1998         case RECALWAIT:
1999                 /* allow heads to settle */
2000                 timeout(fd_pseudointr, fdc, hz / 8);
2001                 fdc->state = RECALCOMPLETE;
2002                 return (0);     /* will return later */
2003         case RECALCOMPLETE:
2004                 do {
2005                         /*
2006                          * See SEEKCOMPLETE for a comment on this:
2007                          */
2008                         if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2009                                 return 0;
2010                         if(fdc->fdct == FDC_NE765
2011                            && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2012                                 return 0; /* hope for a real intr */
2013                 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2014                 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2015                 {
2016                         if(fdc->retry > 3)
2017                                 /*
2018                                  * a recalibrate from beyond cylinder 77
2019                                  * will "fail" due to the FDC limitations;
2020                                  * since people used to complain much about
2021                                  * the failure message, try not logging
2022                                  * this one if it seems to be the first
2023                                  * time in a line
2024                                  */
2025                                 printf("fd%d: recal failed ST0 %b cyl %d\n",
2026                                        fdu, st0, NE7_ST0BITS, cyl);
2027                         if(fdc->retry < 3) fdc->retry = 3;
2028                         return (retrier(fdc));
2029                 }
2030                 fd->track = 0;
2031                 /* Seek (probably) necessary */
2032                 fdc->state = DOSEEK;
2033                 return (1);     /* will return immediatly */
2034         case MOTORWAIT:
2035                 if(fd->flags & FD_MOTOR_WAIT)
2036                 {
2037                         return (0); /* time's not up yet */
2038                 }
2039                 if (fdc->flags & FDC_NEEDS_RESET) {
2040                         fdc->state = RESETCTLR;
2041                         fdc->flags &= ~FDC_NEEDS_RESET;
2042                 } else {
2043                         /*
2044                          * If all motors were off, then the controller was
2045                          * reset, so it has lost track of the current
2046                          * cylinder.  Recalibrate to handle this case.
2047                          * But first, discard the results of the reset.
2048                          */
2049                         fdc->state = RESETCOMPLETE;
2050                 }
2051                 return (1);     /* will return immediatly */
2052         default:
2053                 device_printf(fdc->fdc_dev, "unexpected FD int->");
2054                 if (fd_read_status(fdc, fd->fdsu) == 0)
2055                         printf("FDC status :%x %x %x %x %x %x %x   ",
2056                                fdc->status[0],
2057                                fdc->status[1],
2058                                fdc->status[2],
2059                                fdc->status[3],
2060                                fdc->status[4],
2061                                fdc->status[5],
2062                                fdc->status[6] );
2063                 else
2064                         printf("No status available   ");
2065                 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2066                 {
2067                         printf("[controller is dead now]\n");
2068                         return (0);
2069                 }
2070                 printf("ST0 = %x, PCN = %x\n", st0, cyl);
2071                 return (0);
2072         }
2073         /*XXX confusing: some branches return immediately, others end up here*/
2074         return (1); /* Come back immediatly to new state */
2075 }
2076
2077 static int
2078 retrier(struct fdc_data *fdc)
2079 {
2080         struct buf *bp;
2081         struct fd_data *fd;
2082         int fdu;
2083
2084         bp = fdc->bp;
2085
2086         /* XXX shouldn't this be cached somewhere?  */
2087         fdu = FDUNIT(minor(bp->b_dev));
2088         fd = devclass_get_softc(fd_devclass, fdu);
2089         if (fd->options & FDOPT_NORETRY)
2090                 goto fail;
2091
2092         switch (fdc->retry) {
2093         case 0: case 1: case 2:
2094                 fdc->state = SEEKCOMPLETE;
2095                 break;
2096         case 3: case 4: case 5:
2097                 fdc->state = STARTRECAL;
2098                 break;
2099         case 6:
2100                 fdc->state = RESETCTLR;
2101                 break;
2102         case 7:
2103                 break;
2104         default:
2105         fail:
2106                 {
2107                         int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2108                         dev_t sav_b_dev = bp->b_dev;
2109
2110                         /* Trick diskerr */
2111                         bp->b_dev = makedev(major(bp->b_dev),
2112                                     (FDUNIT(minor(bp->b_dev))<<3)|RAW_PART);
2113                         if (printerror)
2114                                 diskerr(bp, "hard error", LOG_PRINTF,
2115                                         fdc->fd->skip / DEV_BSIZE,
2116                                         (struct disklabel *)NULL);
2117                         bp->b_dev = sav_b_dev;
2118                         if (printerror) {
2119                                 if (fdc->flags & FDC_STAT_VALID)
2120                                         printf(
2121                         " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2122                                                fdc->status[0], NE7_ST0BITS,
2123                                                fdc->status[1], NE7_ST1BITS,
2124                                                fdc->status[2], NE7_ST2BITS,
2125                                                fdc->status[3], fdc->status[4],
2126                                                fdc->status[5]);
2127                                 else
2128                                         printf(" (No status)\n");
2129                         }
2130                 }
2131                 bp->b_flags |= B_ERROR;
2132                 bp->b_error = EIO;
2133                 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2134                 fdc->bp = NULL;
2135                 fdc->fd->skip = 0;
2136                 device_unbusy(fd->dev);
2137                 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2138                 biodone(bp);
2139                 fdc->state = FINDWORK;
2140                 fdc->flags |= FDC_NEEDS_RESET;
2141                 fdc->fd = (fd_p) 0;
2142                 fdc->fdu = -1;
2143                 return (1);
2144         }
2145         fdc->retry++;
2146         return (1);
2147 }
2148
2149 static int
2150 fdformat(dev_t dev, struct fd_formb *finfo, struct thread *td)
2151 {
2152         struct proc *p = td->td_proc;
2153         fdu_t   fdu;
2154         fd_p    fd;
2155
2156         struct buf *bp;
2157         int rv = 0, s;
2158         size_t fdblk;
2159
2160         fdu     = FDUNIT(minor(dev));
2161         fd      = devclass_get_softc(fd_devclass, fdu);
2162         fdblk = 128 << fd->ft->secsize;
2163
2164         /* set up a buffer header for fdstrategy() */
2165         bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT);
2166         if(bp == 0)
2167                 return ENOBUFS;
2168         /*
2169          * keep the process from being swapped
2170          */
2171         PHOLD(p);
2172         bzero((void *)bp, sizeof(struct buf));
2173         BUF_LOCKINIT(bp);
2174         BUF_LOCK(bp, LK_EXCLUSIVE);
2175         bp->b_flags = B_PHYS | B_FORMAT;
2176
2177         /*
2178          * calculate a fake blkno, so fdstrategy() would initiate a
2179          * seek to the requested cylinder
2180          */
2181         bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
2182                 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
2183
2184         bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2185         bp->b_data = (caddr_t)finfo;
2186
2187         /* now do the format */
2188         bp->b_dev = dev;
2189         BUF_STRATEGY(bp, 0);
2190
2191         /* ...and wait for it to complete */
2192         s = splbio();
2193         while(!(bp->b_flags & B_DONE)) {
2194                 rv = tsleep((caddr_t)bp, 0, "fdform", 20 * hz);
2195                 if (rv == EWOULDBLOCK)
2196                         break;
2197         }
2198         splx(s);
2199
2200         if (rv == EWOULDBLOCK) {
2201                 /* timed out */
2202                 rv = EIO;
2203                 device_unbusy(fd->dev);
2204                 biodone(bp);
2205         }
2206         if (bp->b_flags & B_ERROR)
2207                 rv = bp->b_error;
2208         /*
2209          * allow the process to be swapped
2210          */
2211         PRELE(p);
2212         BUF_UNLOCK(bp);
2213         BUF_LOCKFREE(bp);
2214         free(bp, M_TEMP);
2215         return rv;
2216 }
2217
2218 /*
2219  * TODO: don't allocate buffer on stack.
2220  */
2221
2222 static int
2223 fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
2224 {
2225         fdu_t   fdu = FDUNIT(minor(dev));
2226         fd_p    fd = devclass_get_softc(fd_devclass, fdu);
2227         size_t fdblk;
2228
2229         struct fd_type *fdt;
2230         struct disklabel *dl;
2231         struct fdc_status *fsp;
2232         char buffer[DEV_BSIZE];
2233         int error = 0;
2234
2235         fdblk = 128 << fd->ft->secsize;
2236
2237         switch (cmd) {
2238         case DIOCGDINFO:
2239                 bzero(buffer, sizeof (buffer));
2240                 dl = (struct disklabel *)buffer;
2241                 dl->d_secsize = fdblk;
2242                 fdt = fd->ft;
2243                 dl->d_secpercyl = fdt->size / fdt->tracks;
2244                 dl->d_type = DTYPE_FLOPPY;
2245
2246                 if (readdisklabel(dev, dl)
2247                     == NULL)
2248                         error = 0;
2249                 else
2250                         error = EINVAL;
2251
2252                 *(struct disklabel *)addr = *dl;
2253                 break;
2254
2255         case DIOCSDINFO:
2256                 if ((flag & FWRITE) == 0)
2257                         error = EBADF;
2258                 break;
2259
2260         case DIOCWLABEL:
2261                 if ((flag & FWRITE) == 0)
2262                         error = EBADF;
2263                 break;
2264
2265         case DIOCWDINFO:
2266                 if ((flag & FWRITE) == 0) {
2267                         error = EBADF;
2268                         break;
2269                 }
2270
2271                 dl = (struct disklabel *)addr;
2272
2273                 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2274                                           (u_long)0)) != 0)
2275                         break;
2276
2277                 error = writedisklabel(dev, (struct disklabel *)buffer);
2278                 break;
2279         case FD_FORM:
2280                 if ((flag & FWRITE) == 0)
2281                         error = EBADF;  /* must be opened for writing */
2282                 else if (((struct fd_formb *)addr)->format_version !=
2283                         FD_FORMAT_VERSION)
2284                         error = EINVAL; /* wrong version of formatting prog */
2285                 else
2286                         error = fdformat(dev, (struct fd_formb *)addr, td);
2287                 break;
2288
2289         case FD_GTYPE:                  /* get drive type */
2290                 *(struct fd_type *)addr = *fd->ft;
2291                 break;
2292
2293         case FD_STYPE:                  /* set drive type */
2294                 /* this is considered harmful; only allow for superuser */
2295                 if (suser(td) != 0)
2296                         return EPERM;
2297                 *fd->ft = *(struct fd_type *)addr;
2298                 break;
2299
2300         case FD_GOPTS:                  /* get drive options */
2301                 *(int *)addr = fd->options;
2302                 break;
2303
2304         case FD_SOPTS:                  /* set drive options */
2305                 fd->options = *(int *)addr;
2306                 break;
2307
2308         case FD_GSTAT:
2309                 fsp = (struct fdc_status *)addr;
2310                 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2311                         return EINVAL;
2312                 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2313                 break;
2314
2315         default:
2316                 error = ENOTTY;
2317                 break;
2318         }
2319         return (error);
2320 }
2321
2322 /*
2323  * Hello emacs, these are the
2324  * Local Variables:
2325  *  c-indent-level:               8
2326  *  c-continued-statement-offset: 8
2327  *  c-continued-brace-offset:     0
2328  *  c-brace-offset:              -8
2329  *  c-brace-imaginary-offset:     0
2330  *  c-argdecl-indent:             8
2331  *  c-label-offset:              -8
2332  *  c++-hanging-braces:           1
2333  *  c++-access-specifier-offset: -8
2334  *  c++-empty-arglist-indent:     8
2335  *  c++-friend-offset:            0
2336  * End:
2337  */