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 1.40 2007/06/17 23:50:15 dillon Exp $
  55  *
  56  */
  57
  58 #include "opt_fdc.h"
  59 #include "use_pccard.h"
  60
  61 #include <sys/param.h>
  62 #include <sys/systm.h>
  63 #include <sys/bootmaj.h>
  64 #include <sys/kernel.h>
  65 #include <sys/buf.h>
  66 #include <sys/bus.h>
  67 #include <sys/conf.h>
  68 #include <sys/diskslice.h>
  69 #include <sys/disk.h>
  70 #include <sys/devicestat.h>
  71 #include <sys/fcntl.h>
  72 #include <sys/malloc.h>
  73 #include <sys/module.h>
  74 #include <sys/proc.h>
  75 #include <sys/syslog.h>
  76 #include <sys/device.h>
  77 #include <sys/bus.h>
  78 #include <sys/rman.h>
  79 #include <sys/buf2.h>
  80 #include <sys/thread2.h>
  81
  82 #include <machine/clock.h>
  83 #include <machine/ioctl_fd.h>
  84 #include <machine/stdarg.h>
  85
  86 #include <bus/isa/isavar.h>
  87 #include <bus/isa/isareg.h>
  88 #include "fdreg.h"
  89 #include "fdc.h"
  90 #include <bus/isa/rtc.h>
  91
  92 /* configuration flags */
  93 #define FDC_PRETEND_D0  (1 << 0)        /* pretend drive 0 to be there */
  94 #define FDC_NO_FIFO     (1 << 2)        /* do not enable FIFO  */
  95
  96 /* internally used only, not really from CMOS: */
  97 #define RTCFDT_144M_PRETENDED   0x1000
  98
  99 /* error returns for fd_cmd() */
 100 #define FD_FAILED -1
 101 #define FD_NOT_VALID -2
 102 #define FDC_ERRMAX      100     /* do not log more */
 103 /*
 104  * Stop retrying after this many DMA overruns.  Since each retry takes
 105  * one revolution, with 300 rpm., 25 retries take approximately 10
 106  * seconds which the read attempt will block in case the DMA overrun
 107  * is persistent.
 108  */
 109 #define FDC_DMAOV_MAX   25
 110
 111 /*
 112  * Timeout value for the PIO loops to wait until the FDC main status
 113  * register matches our expectations (request for master, direction
 114  * bit).  This is supposed to be a number of microseconds, although
 115  * timing might actually not be very accurate.
 116  *
 117  * Timeouts of 100 msec are believed to be required for some broken
 118  * (old) hardware.
 119  */
 120 #define FDSTS_TIMEOUT   100000
 121
 122 #define NUMTYPES 17
 123 #define NUMDENS  (NUMTYPES - 7)
 124
 125 /* These defines (-1) must match index for fd_types */
 126 #define F_TAPE_TYPE     0x020   /* bit for fd_types to indicate tape */
 127 #define NO_TYPE         0       /* must match NO_TYPE in ft.c */
 128 #define FD_1720         1
 129 #define FD_1480         2
 130 #define FD_1440         3
 131 #define FD_1200         4
 132 #define FD_820          5
 133 #define FD_800          6
 134 #define FD_720          7
 135 #define FD_360          8
 136 #define FD_640          9
 137 #define FD_1232         10
 138
 139 #define FD_1480in5_25   11
 140 #define FD_1440in5_25   12
 141 #define FD_820in5_25    13
 142 #define FD_800in5_25    14
 143 #define FD_720in5_25    15
 144 #define FD_360in5_25    16
 145 #define FD_640in5_25    17
 146
 147
 148 static struct fd_type fd_types[NUMTYPES] =
 149 {
 150 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
 151 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
 152 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
 153 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /*  1.2M in HD 5.25/3.5 */
 154 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /*  820K in HD 3.5in */
 155 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /*  800K in HD 3.5in */
 156 {  9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /*  720K in HD 3.5in */
 157 {  9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /*  360K in DD 5.25in */
 158 {  8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /*  640K in DD 5.25in */
 159 {  8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
 160
 161 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
 162 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
 163 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /*  820K in HD 5.25in */
 164 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /*  800K in HD 5.25in */
 165 {  9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /*  720K in HD 5.25in */
 166 {  9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /*  360K in HD 5.25in */
 167 {  8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /*  640K in HD 5.25in */
 168 };
 169
 170 #define DRVS_PER_CTLR 2         /* 2 floppies */
 171
 172 /***********************************************************************\
 173 * Per controller structure.                                             *
 174 \***********************************************************************/
 175 devclass_t fdc_devclass;
 176
 177 /***********************************************************************\
 178 * Per drive structure.                                                  *
 179 * N per controller  (DRVS_PER_CTLR)                                     *
 180 \***********************************************************************/
 181 struct fd_data {
 182         struct  fdc_data *fdc;  /* pointer to controller structure */
 183         int     fdsu;           /* this units number on this controller */
 184         int     type;           /* Drive type (FD_1440...) */
 185         struct  fd_type ft;     /* the type descriptor */
 186         int     flags;
 187 #define FD_OPEN         0x01    /* it's open            */
 188 #define FD_ACTIVE       0x02    /* it's active          */
 189 #define FD_MOTOR        0x04    /* motor should be on   */
 190 #define FD_MOTOR_WAIT   0x08    /* motor coming up      */
 191         int     skip;
 192         int     hddrv;
 193 #define FD_NO_TRACK -2
 194         int     track;          /* where we think the head is */
 195         int     options;        /* user configurable options, see ioctl_fd.h */
 196         struct  callout toffhandle;
 197         struct  callout tohandle;
 198         struct  callout motor;
 199         struct  disk disk;
 200         struct  devstat device_stats;
 201         device_t dev;
 202         fdu_t   fdu;
 203 };
 204
 205 struct fdc_ivars {
 206         int     fdunit;
 207 };
 208 static devclass_t fd_devclass;
 209
 210 /***********************************************************************\
 211 * Throughout this file the following conventions will be used:          *
 212 * fd is a pointer to the fd_data struct for the drive in question       *
 213 * fdc is a pointer to the fdc_data struct for the controller            *
 214 * fdu is the floppy drive unit number                                   *
 215 * fdcu is the floppy controller unit number                             *
 216 * fdsu is the floppy drive unit number on that controller. (sub-unit)   *
 217 \***********************************************************************/
 218
 219 /* internal functions */
 220 static  void fdc_intr(void *);
 221 static void set_motor(struct fdc_data *, int, int);
 222 #  define TURNON 1
 223 #  define TURNOFF 0
 224 static timeout_t fd_turnoff;
 225 static timeout_t fd_motor_on;
 226 static void fd_turnon(struct fd_data *);
 227 static void fdc_reset(fdc_p);
 228 static int fd_in(struct fdc_data *, int *);
 229 static int out_fdc(struct fdc_data *, int);
 230 static void fdstart(struct fdc_data *);
 231 static timeout_t fd_iotimeout;
 232 static timeout_t fd_pseudointr;
 233 static int fdstate(struct fdc_data *);
 234 static int retrier(struct fdc_data *);
 235 static int fdformat(cdev_t, struct fd_formb *, struct ucred *);
 236
 237 static int enable_fifo(fdc_p fdc);
 238
 239 static int fifo_threshold = 8;  /* XXX: should be accessible via sysctl */
 240
 241
 242 #define DEVIDLE         0
 243 #define FINDWORK        1
 244 #define DOSEEK          2
 245 #define SEEKCOMPLETE    3
 246 #define IOCOMPLETE      4
 247 #define RECALCOMPLETE   5
 248 #define STARTRECAL      6
 249 #define RESETCTLR       7
 250 #define SEEKWAIT        8
 251 #define RECALWAIT       9
 252 #define MOTORWAIT       10
 253 #define IOTIMEDOUT      11
 254 #define RESETCOMPLETE   12
 255 #define PIOREAD         13
 256
 257 #ifdef  FDC_DEBUG
 258 static char const * const fdstates[] =
 259 {
 260 "DEVIDLE",
 261 "FINDWORK",
 262 "DOSEEK",
 263 "SEEKCOMPLETE",
 264 "IOCOMPLETE",
 265 "RECALCOMPLETE",
 266 "STARTRECAL",
 267 "RESETCTLR",
 268 "SEEKWAIT",
 269 "RECALWAIT",
 270 "MOTORWAIT",
 271 "IOTIMEDOUT",
 272 "RESETCOMPLETE",
 273 "PIOREAD",
 274 };
 275
 276 /* CAUTION: fd_debug causes huge amounts of logging output */
 277 static int volatile fd_debug = 0;
 278 #define TRACE0(arg) if(fd_debug) kprintf(arg)
 279 #define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2)
 280 #else /* FDC_DEBUG */
 281 #define TRACE0(arg)
 282 #define TRACE1(arg1, arg2)
 283 #endif /* FDC_DEBUG */
 284
 285 void
 286 fdout_wr(fdc_p fdc, u_int8_t v)
 287 {
 288         bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
 289 }
 290
 291 static u_int8_t
 292 fdsts_rd(fdc_p fdc)
 293 {
 294         return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
 295 }
 296
 297 static void
 298 fddata_wr(fdc_p fdc, u_int8_t v)
 299 {
 300         bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
 301 }
 302
 303 static u_int8_t
 304 fddata_rd(fdc_p fdc)
 305 {
 306         return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
 307 }
 308
 309 static void
 310 fdctl_wr_isa(fdc_p fdc, u_int8_t v)
 311 {
 312         bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
 313 }
 314
 315 #if 0
 316
 317 static u_int8_t
 318 fdin_rd(fdc_p fdc)
 319 {
 320         return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
 321 }
 322
 323 #endif
 324
 325 static  d_open_t        Fdopen; /* NOTE, not fdopen */
 326 static  d_close_t       fdclose;
 327 static  d_ioctl_t       fdioctl;
 328 static  d_strategy_t    fdstrategy;
 329
 330 static struct dev_ops fd_ops = {
 331         { "fd", FD_CDEV_MAJOR, D_DISK },
 332         .d_open =       Fdopen,
 333         .d_close =      fdclose,
 334         .d_read =       physread,
 335         .d_write =      physwrite,
 336         .d_ioctl =      fdioctl,
 337         .d_strategy =   fdstrategy,
 338 };
 339
 340 static int
 341 fdc_err(struct fdc_data *fdc, const char *s)
 342 {
 343         fdc->fdc_errs++;
 344         if (s) {
 345                 if (fdc->fdc_errs < FDC_ERRMAX)
 346                         device_printf(fdc->fdc_dev, "%s", s);
 347                 else if (fdc->fdc_errs == FDC_ERRMAX)
 348                         device_printf(fdc->fdc_dev, "too many errors, not "
 349                                                     "logging any more\n");
 350         }
 351
 352         return FD_FAILED;
 353 }
 354
 355 /*
 356  * fd_cmd: Send a command to the chip.  Takes a varargs with this structure:
 357  * Unit number,
 358  * # of output bytes, output bytes as ints ...,
 359  * # of input bytes, input bytes as ints ...
 360  */
 361 int
 362 fd_cmd(struct fdc_data *fdc, int n_out, ...)
 363 {
 364         u_char cmd;
 365         int n_in;
 366         int n;
 367         __va_list ap;
 368
 369         __va_start(ap, n_out);
 370         cmd = (u_char)(__va_arg(ap, int));
 371         __va_end(ap);
 372         __va_start(ap, n_out);
 373         for (n = 0; n < n_out; n++)
 374         {
 375                 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
 376                 {
 377                         char msg[50];
 378                         ksnprintf(msg, sizeof(msg),
 379                                 "cmd %x failed at out byte %d of %d\n",
 380                                 cmd, n + 1, n_out);
 381                         return fdc_err(fdc, msg);
 382                 }
 383         }
 384         n_in = __va_arg(ap, int);
 385         for (n = 0; n < n_in; n++)
 386         {
 387                 int *ptr = __va_arg(ap, int *);
 388                 if (fd_in(fdc, ptr) < 0)
 389                 {
 390                         char msg[50];
 391                         ksnprintf(msg, sizeof(msg),
 392                                 "cmd %02x failed at in byte %d of %d\n",
 393                                 cmd, n + 1, n_in);
 394                         return fdc_err(fdc, msg);
 395                 }
 396         }
 397
 398         return 0;
 399 }
 400
 401 static int
 402 enable_fifo(fdc_p fdc)
 403 {
 404         int i, j;
 405
 406         if ((fdc->flags & FDC_HAS_FIFO) == 0) {
 407
 408                 /*
 409                  * XXX:
 410                  * Cannot use fd_cmd the normal way here, since
 411                  * this might be an invalid command. Thus we send the
 412                  * first byte, and check for an early turn of data directon.
 413                  */
 414
 415                 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
 416                         return fdc_err(fdc, "Enable FIFO failed\n");
 417
 418                 /* If command is invalid, return */
 419                 j = FDSTS_TIMEOUT;
 420                 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
 421                        != NE7_RQM && j-- > 0) {
 422                         if (i == (NE7_DIO | NE7_RQM)) {
 423                                 fdc_reset(fdc);
 424                                 return FD_FAILED;
 425                         }
 426                         DELAY(1);
 427                 }
 428                 if (j<0 ||
 429                     fd_cmd(fdc, 3,
 430                            0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
 431                         fdc_reset(fdc);
 432                         return fdc_err(fdc, "Enable FIFO failed\n");
 433                 }
 434                 fdc->flags |= FDC_HAS_FIFO;
 435                 return 0;
 436         }
 437         if (fd_cmd(fdc, 4,
 438                    I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
 439                 return fdc_err(fdc, "Re-enable FIFO failed\n");
 440         return 0;
 441 }
 442
 443 static int
 444 fd_sense_drive_status(fdc_p fdc, int *st3p)
 445 {
 446         int st3;
 447
 448         if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
 449         {
 450                 return fdc_err(fdc, "Sense Drive Status failed\n");
 451         }
 452         if (st3p)
 453                 *st3p = st3;
 454
 455         return 0;
 456 }
 457
 458 static int
 459 fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
 460 {
 461         int cyl, st0, ret;
 462
 463         ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
 464         if (ret) {
 465                 (void)fdc_err(fdc,
 466                               "sense intr err reading stat reg 0\n");
 467                 return ret;
 468         }
 469
 470         if (st0p)
 471                 *st0p = st0;
 472
 473         if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
 474                 /*
 475                  * There doesn't seem to have been an interrupt.
 476                  */
 477                 return FD_NOT_VALID;
 478         }
 479
 480         if (fd_in(fdc, &cyl) < 0) {
 481                 return fdc_err(fdc, "can't get cyl num\n");
 482         }
 483
 484         if (cylp)
 485                 *cylp = cyl;
 486
 487         return 0;
 488 }
 489
 490
 491 static int
 492 fd_read_status(fdc_p fdc, int fdsu)
 493 {
 494         int i, ret;
 495
 496         for (i = 0; i < 7; i++) {
 497                 /*
 498                  * XXX types are poorly chosen.  Only bytes can by read
 499                  * from the hardware, but fdc->status[] wants u_ints and
 500                  * fd_in() gives ints.
 501                  */
 502                 int status;
 503
 504                 ret = fd_in(fdc, &status);
 505                 fdc->status[i] = status;
 506                 if (ret != 0)
 507                         break;
 508         }
 509
 510         if (ret == 0)
 511                 fdc->flags |= FDC_STAT_VALID;
 512         else
 513                 fdc->flags &= ~FDC_STAT_VALID;
 514
 515         return ret;
 516 }
 517
 518 /****************************************************************************/
 519 /*                      autoconfiguration stuff                             */
 520 /****************************************************************************/
 521
 522 int
 523 fdc_alloc_resources(struct fdc_data *fdc)
 524 {
 525         device_t dev;
 526         int ispnp, ispcmcia;
 527
 528         dev = fdc->fdc_dev;
 529         ispnp = (fdc->flags & FDC_ISPNP) != 0;
 530         ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
 531         fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
 532         fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
 533
 534         /*
 535          * On standard ISA, we don't just use an 8 port range
 536          * (e.g. 0x3f0-0x3f7) since that covers an IDE control
 537          * register at 0x3f6.
 538          *
 539          * Isn't PC hardware wonderful.
 540          *
 541          * The Y-E Data PCMCIA FDC doesn't have this problem, it
 542          * uses the register with offset 6 for pseudo-DMA, and the
 543          * one with offset 7 as control register.
 544          */
 545         fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
 546                                              &fdc->rid_ioport, 0ul, ~0ul,
 547                                              ispcmcia ? 8 : (ispnp ? 1 : 6),
 548                                              RF_ACTIVE);
 549         if (fdc->res_ioport == 0) {
 550                 device_printf(dev, "cannot reserve I/O port range\n");
 551                 return ENXIO;
 552         }
 553         fdc->portt = rman_get_bustag(fdc->res_ioport);
 554         fdc->porth = rman_get_bushandle(fdc->res_ioport);
 555
 556         if (!ispcmcia) {
 557                 /*
 558                  * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
 559                  * and some at 0x3f0-0x3f5,0x3f7. We detect the former
 560                  * by checking the size and adjust the port address
 561                  * accordingly.
 562                  */
 563                 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
 564                         fdc->port_off = -2;
 565
 566                 /*
 567                  * Register the control port range as rid 1 if it
 568                  * isn't there already. Most PnP BIOSen will have
 569                  * already done this but non-PnP configurations don't.
 570                  *
 571                  * And some (!!) report 0x3f2-0x3f5 and completely
 572                  * leave out the control register!  It seems that some
 573                  * non-antique controller chips have a different
 574                  * method of programming the transfer speed which
 575                  * doesn't require the control register, but it's
 576                  * mighty bogus as the chip still responds to the
 577                  * address for the control register.
 578                  */
 579                 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
 580                         u_long ctlstart;
 581
 582                         /* Find the control port, usually 0x3f7 */
 583                         ctlstart = rman_get_start(fdc->res_ioport) +
 584                                 fdc->port_off + 7;
 585
 586                         bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
 587                 }
 588
 589                 /*
 590                  * Now (finally!) allocate the control port.
 591                  */
 592                 fdc->rid_ctl = 1;
 593                 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
 594                                                   &fdc->rid_ctl,
 595                                                   0ul, ~0ul, 1, RF_ACTIVE);
 596                 if (fdc->res_ctl == 0) {
 597                         device_printf(dev,
 598                                       "cannot reserve control I/O port range\n");
 599                         return ENXIO;
 600                 }
 601                 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
 602                 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
 603         }
 604
 605         fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
 606                                           &fdc->rid_irq, 0ul, ~0ul, 1,
 607                                           RF_ACTIVE);
 608         if (fdc->res_irq == 0) {
 609                 device_printf(dev, "cannot reserve interrupt line\n");
 610                 return ENXIO;
 611         }
 612
 613         if ((fdc->flags & FDC_NODMA) == 0) {
 614                 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
 615                                                   &fdc->rid_drq, 0ul, ~0ul, 1,
 616                                                   RF_ACTIVE);
 617                 if (fdc->res_drq == 0) {
 618                         device_printf(dev, "cannot reserve DMA request line\n");
 619                         return ENXIO;
 620                 }
 621                 fdc->dmachan = fdc->res_drq->r_start;
 622         }
 623
 624         return 0;
 625 }
 626
 627 void
 628 fdc_release_resources(struct fdc_data *fdc)
 629 {
 630         device_t dev;
 631
 632         dev = fdc->fdc_dev;
 633         if (fdc->res_irq != 0) {
 634                 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
 635                                         fdc->res_irq);
 636                 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
 637                                      fdc->res_irq);
 638         }
 639         if (fdc->res_ctl != 0) {
 640                 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
 641                                         fdc->res_ctl);
 642                 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
 643                                      fdc->res_ctl);
 644         }
 645         if (fdc->res_ioport != 0) {
 646                 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
 647                                         fdc->res_ioport);
 648                 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
 649                                      fdc->res_ioport);
 650         }
 651         if (fdc->res_drq != 0) {
 652                 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
 653                                         fdc->res_drq);
 654                 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
 655                                      fdc->res_drq);
 656         }
 657 }
 658
 659 /****************************************************************************/
 660 /*                      autoconfiguration stuff                             */
 661 /****************************************************************************/
 662
 663 static struct isa_pnp_id fdc_ids[] = {
 664         {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
 665         {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
 666         {0}
 667 };
 668
 669 int
 670 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
 671 {
 672         struct fdc_ivars *ivars = device_get_ivars(child);
 673
 674         switch (which) {
 675         case FDC_IVAR_FDUNIT:
 676                 *result = ivars->fdunit;
 677                 break;
 678         default:
 679                 return ENOENT;
 680         }
 681         return 0;
 682 }
 683
 684 /*
 685  * fdc controller section.
 686  */
 687 static int
 688 fdc_probe(device_t dev)
 689 {
 690         int     error, ic_type;
 691         struct  fdc_data *fdc;
 692
 693         fdc = device_get_softc(dev);
 694         bzero(fdc, sizeof *fdc);
 695         fdc->fdc_dev = dev;
 696         fdc->fdctl_wr = fdctl_wr_isa;
 697
 698         /* Check pnp ids */
 699         error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
 700         if (error == ENXIO)
 701                 return ENXIO;
 702         if (error == 0)
 703                 fdc->flags |= FDC_ISPNP;
 704
 705         /* Attempt to allocate our resources for the duration of the probe */
 706         error = fdc_alloc_resources(fdc);
 707         if (error)
 708                 goto out;
 709
 710         /* First - lets reset the floppy controller */
 711         fdout_wr(fdc, 0);
 712         DELAY(100);
 713         fdout_wr(fdc, FDO_FRST);
 714
 715         /* see if it can handle a command */
 716         if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
 717                    NE7_SPEC_2(2, 0), 0)) {
 718                 error = ENXIO;
 719                 goto out;
 720         }
 721
 722         if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
 723                 ic_type = (u_char)ic_type;
 724                 switch (ic_type) {
 725                 case 0x80:
 726                         device_set_desc(dev, "NEC 765 or clone");
 727                         fdc->fdct = FDC_NE765;
 728                         break;
 729                 case 0x81:
 730                         device_set_desc(dev, "Intel 82077 or clone");
 731                         fdc->fdct = FDC_I82077;
 732                         break;
 733                 case 0x90:
 734                         device_set_desc(dev, "NEC 72065B or clone");
 735                         fdc->fdct = FDC_NE72065;
 736                         break;
 737                 default:
 738                         device_set_desc(dev, "generic floppy controller");
 739                         fdc->fdct = FDC_UNKNOWN;
 740                         break;
 741                 }
 742         }
 743
 744 out:
 745         fdc_release_resources(fdc);
 746         return (error);
 747 }
 748
 749 /*
 750  * Add a child device to the fdc controller.  It will then be probed etc.
 751  */
 752 static void
 753 fdc_add_child(device_t dev, const char *name, int unit)
 754 {
 755         int     disabled;
 756         struct fdc_ivars *ivar;
 757         device_t child;
 758
 759         ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
 760         if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
 761                 ivar->fdunit = 0;
 762         child = device_add_child(dev, name, unit);
 763         if (child == NULL)
 764                 return;
 765         device_set_ivars(child, ivar);
 766         if (resource_int_value(name, unit, "disabled", &disabled) == 0
 767             && disabled != 0)
 768                 device_disable(child);
 769 }
 770
 771 int
 772 fdc_attach(device_t dev)
 773 {
 774         struct  fdc_data *fdc;
 775         int     i, error;
 776
 777         fdc = device_get_softc(dev);
 778
 779         callout_init(&fdc->pseudointr_ch);
 780
 781         error = fdc_alloc_resources(fdc);
 782         if (error) {
 783                 device_printf(dev, "cannot re-aquire resources\n");
 784                 return error;
 785         }
 786         error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
 787                                0, fdc_intr, fdc,
 788                                &fdc->fdc_intr, NULL);
 789         if (error) {
 790                 device_printf(dev, "cannot setup interrupt\n");
 791                 return error;
 792         }
 793         fdc->fdcu = device_get_unit(dev);
 794         fdc->flags |= FDC_ATTACHED;
 795
 796         if ((fdc->flags & FDC_NODMA) == 0) {
 797                 /* Acquire the DMA channel forever, The driver will do the rest */
 798                                 /* XXX should integrate with rman */
 799                 isa_dma_acquire(fdc->dmachan);
 800                 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
 801         }
 802         fdc->state = DEVIDLE;
 803
 804         /* reset controller, turn motor off, clear fdout mirror reg */
 805         fdout_wr(fdc, ((fdc->fdout = 0)));
 806         bioq_init(&fdc->bio_queue);
 807
 808         /*
 809          * Probe and attach any children.  We should probably detect
 810          * devices from the BIOS unless overridden.
 811          */
 812         for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
 813              i != -1;
 814              i = resource_query_string(i, "at", device_get_nameunit(dev)))
 815                 fdc_add_child(dev, resource_query_name(i),
 816                                resource_query_unit(i));
 817
 818         return (bus_generic_attach(dev));
 819 }
 820
 821 int
 822 fdc_print_child(device_t me, device_t child)
 823 {
 824         int retval = 0;
 825
 826         retval += bus_print_child_header(me, child);
 827         retval += kprintf(" on %s drive %d\n", device_get_nameunit(me),
 828                fdc_get_fdunit(child));
 829
 830         return (retval);
 831 }
 832
 833 static device_method_t fdc_methods[] = {
 834         /* Device interface */
 835         DEVMETHOD(device_probe,         fdc_probe),
 836         DEVMETHOD(device_attach,        fdc_attach),
 837         DEVMETHOD(device_detach,        bus_generic_detach),
 838         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
 839         DEVMETHOD(device_suspend,       bus_generic_suspend),
 840         DEVMETHOD(device_resume,        bus_generic_resume),
 841
 842         /* Bus interface */
 843         DEVMETHOD(bus_print_child,      fdc_print_child),
 844         DEVMETHOD(bus_read_ivar,        fdc_read_ivar),
 845         /* Our children never use any other bus interface methods. */
 846
 847         { 0, 0 }
 848 };
 849
 850 static driver_t fdc_driver = {
 851         "fdc",
 852         fdc_methods,
 853         sizeof(struct fdc_data)
 854 };
 855
 856 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
 857
 858 /******************************************************************/
 859 /*
 860  * devices attached to the controller section.
 861  */
 862 static int
 863 fd_probe(device_t dev)
 864 {
 865         int     i;
 866         u_int   fdt, st0, st3;
 867         struct  fd_data *fd;
 868         struct  fdc_data *fdc;
 869         fdsu_t  fdsu;
 870         static int fd_fifo = 0;
 871
 872         fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
 873         fd = device_get_softc(dev);
 874         fdc = device_get_softc(device_get_parent(dev));
 875
 876         bzero(fd, sizeof *fd);
 877         fd->dev = dev;
 878         fd->fdc = fdc;
 879         fd->fdsu = fdsu;
 880         fd->fdu = device_get_unit(dev);
 881
 882 #ifdef __i386__
 883         /* look up what bios thinks we have */
 884         switch (fd->fdu) {
 885         case 0:
 886                 if ((fdc->flags & FDC_ISPCMCIA))
 887                         fdt = RTCFDT_144M;
 888                 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
 889                         fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
 890                 else
 891                         fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
 892                 break;
 893         case 1:
 894                 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
 895                 break;
 896         default:
 897                 fdt = RTCFDT_NONE;
 898                 break;
 899         }
 900 #else
 901         fdt = RTCFDT_144M;      /* XXX probably */
 902 #endif
 903
 904         /* is there a unit? */
 905         if (fdt == RTCFDT_NONE)
 906                 return (ENXIO);
 907
 908         /* select it */
 909         set_motor(fdc, fdsu, TURNON);
 910         DELAY(1000000); /* 1 sec */
 911
 912         /* XXX This doesn't work before the first set_motor() */
 913         if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
 914             && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
 915             && enable_fifo(fdc) == 0) {
 916                 device_printf(device_get_parent(dev),
 917                     "FIFO enabled, %d bytes threshold\n", fifo_threshold);
 918         }
 919         fd_fifo = 1;
 920
 921         if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
 922             && (st3 & NE7_ST3_T0)) {
 923                 /* if at track 0, first seek inwards */
 924                 /* seek some steps: */
 925                 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
 926                 DELAY(300000); /* ...wait a moment... */
 927                 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
 928         }
 929
 930         /* If we're at track 0 first seek inwards. */
 931         if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
 932                 /* Seek some steps... */
 933                 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
 934                         /* ...wait a moment... */
 935                         DELAY(300000);
 936                         /* make ctrlr happy: */
 937                         fd_sense_int(fdc, 0, 0);
 938                 }
 939         }
 940
 941         for (i = 0; i < 2; i++) {
 942                 /*
 943                  * we must recalibrate twice, just in case the
 944                  * heads have been beyond cylinder 76, since most
 945                  * FDCs still barf when attempting to recalibrate
 946                  * more than 77 steps
 947                  */
 948                 /* go back to 0: */
 949                 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
 950                         /* a second being enough for full stroke seek*/
 951                         DELAY(i == 0 ? 1000000 : 300000);
 952
 953                         /* anything responding? */
 954                         if (fd_sense_int(fdc, &st0, 0) == 0 &&
 955                             (st0 & NE7_ST0_EC) == 0)
 956                                 break; /* already probed succesfully */
 957                 }
 958         }
 959
 960         set_motor(fdc, fdsu, TURNOFF);
 961
 962         if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
 963                 return (ENXIO);
 964
 965         fd->track = FD_NO_TRACK;
 966         fd->fdc = fdc;
 967         fd->fdsu = fdsu;
 968         fd->options = 0;
 969         callout_init(&fd->toffhandle);
 970         callout_init(&fd->tohandle);
 971         callout_init(&fd->motor);
 972
 973         switch (fdt) {
 974         case RTCFDT_12M:
 975                 device_set_desc(dev, "1200-KB 5.25\" drive");
 976                 fd->type = FD_1200;
 977                 break;
 978         case RTCFDT_144M | RTCFDT_144M_PRETENDED:
 979                 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
 980                 fdt = RTCFDT_144M;
 981                 fd->type = FD_1440;
 982         case RTCFDT_144M:
 983                 device_set_desc(dev, "1440-KB 3.5\" drive");
 984                 fd->type = FD_1440;
 985                 break;
 986         case RTCFDT_288M:
 987         case RTCFDT_288M_1:
 988                 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
 989                 fd->type = FD_1440;
 990                 break;
 991         case RTCFDT_360K:
 992                 device_set_desc(dev, "360-KB 5.25\" drive");
 993                 fd->type = FD_360;
 994                 break;
 995         case RTCFDT_720K:
 996                 kprintf("720-KB 3.5\" drive");
 997                 fd->type = FD_720;
 998                 break;
 999         default:
1000                 return (ENXIO);
1001         }
1002         fd->ft = fd_types[fd->type - 1];
1003         return (0);
1004 }
1005
1006 static int
1007 fd_attach(device_t dev)
1008 {
1009         struct  fd_data *fd;
1010
1011         fd = device_get_softc(dev);
1012
1013         disk_create(fd->fdu, &fd->disk, &fd_ops);
1014
1015         /*
1016          * Make special raw floppy devices with preset types to
1017          * make formatting easier.  These override the disk management
1018          * layer for the whole-slice-disk for partitions 128-191.  Note
1019          * that we do not override partition 255, which is the
1020          * whole-slice-part.  If we did we would have to provide our
1021          * own DIOCGPART ioctl.
1022          */
1023         dev_ops_add(&fd_ops,
1024                     dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),
1025                     dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128));
1026         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 1),
1027                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1720", fd->fdu);
1028         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 2),
1029                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1480", fd->fdu);
1030         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 3),
1031                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1440", fd->fdu);
1032         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 4),
1033                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1200", fd->fdu);
1034         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 5),
1035                  UID_ROOT, GID_WHEEL, 0600, "fd%d.820", fd->fdu);
1036         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 6),
1037                  UID_ROOT, GID_WHEEL, 0600, "fd%d.800", fd->fdu);
1038         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 7),
1039                  UID_ROOT, GID_WHEEL, 0600, "fd%d.720", fd->fdu);
1040         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 8),
1041                  UID_ROOT, GID_WHEEL, 0600, "fd%d.360", fd->fdu);
1042         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 9),
1043                  UID_ROOT, GID_WHEEL, 0600, "fd%d.640", fd->fdu);
1044         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 10),
1045                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1232", fd->fdu);
1046
1047         devstat_add_entry(&fd->device_stats, device_get_name(dev),
1048                           device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1049                           DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1050                           DEVSTAT_PRIORITY_FD);
1051         return (0);
1052 }
1053
1054 static int
1055 fd_detach(device_t dev)
1056 {
1057         struct  fd_data *fd;
1058
1059         fd = device_get_softc(dev);
1060         dev_ops_remove(&fd_ops,
1061                          dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),
1062                          dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128));
1063         disk_invalidate(&fd->disk);
1064         disk_destroy(&fd->disk);
1065         devstat_remove_entry(&fd->device_stats);
1066         callout_stop(&fd->toffhandle);
1067         callout_stop(&fd->motor);
1068
1069         return (0);
1070 }
1071
1072 static device_method_t fd_methods[] = {
1073         /* Device interface */
1074         DEVMETHOD(device_probe,         fd_probe),
1075         DEVMETHOD(device_attach,        fd_attach),
1076         DEVMETHOD(device_detach,        fd_detach),
1077         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
1078         DEVMETHOD(device_suspend,       bus_generic_suspend), /* XXX */
1079         DEVMETHOD(device_resume,        bus_generic_resume), /* XXX */
1080
1081         { 0, 0 }
1082 };
1083
1084 static driver_t fd_driver = {
1085         "fd",
1086         fd_methods,
1087         sizeof(struct fd_data)
1088 };
1089
1090 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1091
1092 /****************************************************************************/
1093 /*                            motor control stuff                           */
1094 /*              remember to not deselect the drive we're working on         */
1095 /****************************************************************************/
1096 static void
1097 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1098 {
1099         int fdout = fdc->fdout;
1100         int needspecify = 0;
1101
1102         if(turnon) {
1103                 fdout &= ~FDO_FDSEL;
1104                 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1105         } else
1106                 fdout &= ~(FDO_MOEN0 << fdsu);
1107
1108         if(!turnon
1109            && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1110                 /* gonna turn off the last drive, put FDC to bed */
1111                 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1112         else {
1113                 /* make sure controller is selected and specified */
1114                 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1115                         needspecify = 1;
1116                 fdout |= (FDO_FRST|FDO_FDMAEN);
1117         }
1118
1119         fdout_wr(fdc, fdout);
1120         fdc->fdout = fdout;
1121         TRACE1("[0x%x->FDOUT]", fdout);
1122
1123         if (needspecify) {
1124                 /*
1125                  * XXX
1126                  * special case: since we have just woken up the FDC
1127                  * from its sleep, we silently assume the command will
1128                  * be accepted, and do not test for a timeout
1129                  */
1130                 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1131                              NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1132                              0);
1133                 if (fdc->flags & FDC_HAS_FIFO)
1134                         (void) enable_fifo(fdc);
1135         }
1136 }
1137
1138 static void
1139 fd_turnoff(void *xfd)
1140 {
1141         fd_p fd = xfd;
1142
1143         TRACE1("[fd%d: turnoff]", fd->fdu);
1144
1145         crit_enter();
1146         /*
1147          * Don't turn off the motor yet if the drive is active.
1148          *
1149          * If we got here, this could only mean we missed an interrupt.
1150          * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1151          * after a controller reset.  Just schedule a pseudo-interrupt
1152          * so the state machine gets re-entered.
1153          */
1154         if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1155                 fdc_intr(fd->fdc);
1156                 crit_exit();
1157                 return;
1158         }
1159
1160         fd->flags &= ~FD_MOTOR;
1161         set_motor(fd->fdc, fd->fdsu, TURNOFF);
1162         crit_exit();
1163 }
1164
1165 static void
1166 fd_motor_on(void *xfd)
1167 {
1168         fd_p fd = xfd;
1169
1170         crit_enter();
1171         fd->flags &= ~FD_MOTOR_WAIT;
1172         if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1173         {
1174                 fdc_intr(fd->fdc);
1175         }
1176         crit_exit();
1177 }
1178
1179 static void
1180 fd_turnon(fd_p fd)
1181 {
1182         if(!(fd->flags & FD_MOTOR))
1183         {
1184                 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1185                 set_motor(fd->fdc, fd->fdsu, TURNON);
1186                 callout_reset(&fd->motor, hz, fd_motor_on, fd);
1187         }
1188 }
1189
1190 static void
1191 fdc_reset(fdc_p fdc)
1192 {
1193         /* Try a reset, keep motor on */
1194         fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1195         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1196         DELAY(100);
1197         /* enable FDC, but defer interrupts a moment */
1198         fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1199         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1200         DELAY(100);
1201         fdout_wr(fdc, fdc->fdout);
1202         TRACE1("[0x%x->FDOUT]", fdc->fdout);
1203
1204         /* XXX after a reset, silently believe the FDC will accept commands */
1205         (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1206                      NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1207                      0);
1208         if (fdc->flags & FDC_HAS_FIFO)
1209                 (void) enable_fifo(fdc);
1210 }
1211
1212 /****************************************************************************/
1213 /*                             fdc in/out                                   */
1214 /****************************************************************************/
1215 /*
1216  * FDC IO functions, take care of the main status register, timeout
1217  * in case the desired status bits are never set.
1218  *
1219  * These PIO loops initially start out with short delays between
1220  * each iteration in the expectation that the required condition
1221  * is usually met quickly, so it can be handled immediately.  After
1222  * about 1 ms, stepping is increased to achieve a better timing
1223  * accuracy in the calls to DELAY().
1224  */
1225 static int
1226 fd_in(struct fdc_data *fdc, int *ptr)
1227 {
1228         int i, j, step;
1229
1230         for (j = 0, step = 1;
1231             (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1232             j < FDSTS_TIMEOUT;
1233             j += step) {
1234                 if (i == NE7_RQM)
1235                         return (fdc_err(fdc, "ready for output in input\n"));
1236                 if (j == 1000)
1237                         step = 1000;
1238                 DELAY(step);
1239         }
1240         if (j >= FDSTS_TIMEOUT)
1241                 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1242 #ifdef  FDC_DEBUG
1243         i = fddata_rd(fdc);
1244         TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1245         *ptr = i;
1246         return (0);
1247 #else   /* !FDC_DEBUG */
1248         i = fddata_rd(fdc);
1249         if (ptr)
1250                 *ptr = i;
1251         return (0);
1252 #endif  /* FDC_DEBUG */
1253 }
1254
1255 static int
1256 out_fdc(struct fdc_data *fdc, int x)
1257 {
1258         int i, j, step;
1259
1260         for (j = 0, step = 1;
1261             (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1262             j < FDSTS_TIMEOUT;
1263             j += step) {
1264                 if (i == (NE7_DIO|NE7_RQM))
1265                         return (fdc_err(fdc, "ready for input in output\n"));
1266                 if (j == 1000)
1267                         step = 1000;
1268                 DELAY(step);
1269         }
1270         if (j >= FDSTS_TIMEOUT)
1271                 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1272
1273         /* Send the command and return */
1274         fddata_wr(fdc, x);
1275         TRACE1("[0x%x->FDDATA]", x);
1276         return (0);
1277 }
1278
1279 /****************************************************************************/
1280 /*                           fdopen/fdclose                                 */
1281 /****************************************************************************/
1282 int
1283 Fdopen(struct dev_open_args *ap)
1284 {
1285         cdev_t dev = ap->a_head.a_dev;
1286         fdu_t fdu = dkunit(dev);
1287         struct disk_info info;
1288         struct fd_type *ft;
1289         int     type;
1290         int     changetype;
1291         fd_p    fd;
1292         fdc_p   fdc;
1293
1294         /* check bounds */
1295         if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1296                 return (ENXIO);
1297         fdc = fd->fdc;
1298         if ((fdc == NULL) || (fd->type == NO_TYPE))
1299                 return (ENXIO);
1300
1301         /*
1302          * Figure out the type of floppy.  There are special whole-disk-device
1303          * overrides that will override the current type.
1304          */
1305         type = dkpart(dev);
1306         if (type == WHOLE_SLICE_PART) {
1307                 type = fd->type;        /* do not change selected type data */
1308                 changetype = 0;
1309         } else if (type > 128) {
1310                 type -= 128;            /* set to specific format */
1311                 changetype = 1;
1312         } else {
1313                 type = fd->type;        /* reset to default */
1314                 changetype = 1;
1315         }
1316         if (type > NUMDENS)
1317                 return (ENXIO);
1318         if (type != fd->type) {
1319                 /*
1320                  * For each type of basic drive, make sure we are trying
1321                  * to open a type it can do,
1322                  */
1323                 switch (fd->type) {
1324                 case FD_360:
1325                         return (ENXIO);
1326                 case FD_720:
1327                         if (   type != FD_820
1328                             && type != FD_800
1329                             && type != FD_640
1330                            )
1331                                 return (ENXIO);
1332                         break;
1333                 case FD_1200:
1334                         switch (type) {
1335                         case FD_1480:
1336                                 type = FD_1480in5_25;
1337                                 break;
1338                         case FD_1440:
1339                                 type = FD_1440in5_25;
1340                                 break;
1341                         case FD_1232:
1342                                 break;
1343                         case FD_820:
1344                                 type = FD_820in5_25;
1345                                 break;
1346                         case FD_800:
1347                                 type = FD_800in5_25;
1348                                 break;
1349                         case FD_720:
1350                                 type = FD_720in5_25;
1351                                 break;
1352                         case FD_640:
1353                                 type = FD_640in5_25;
1354                                 break;
1355                         case FD_360:
1356                                 type = FD_360in5_25;
1357                                 break;
1358                         default:
1359                                 return(ENXIO);
1360                         }
1361                         break;
1362                 case FD_1440:
1363                         if (   type != FD_1720
1364                             && type != FD_1480
1365                             && type != FD_1200
1366                             && type != FD_820
1367                             && type != FD_800
1368                             && type != FD_720
1369                             && type != FD_640
1370                             )
1371                                 return(ENXIO);
1372                         break;
1373                 }
1374         }
1375
1376         /*
1377          * fd->type is the basic drive type, not the current format
1378          * we are reading.  We only change the type when opening the
1379          * whole-slice-partition
1380          */
1381         if (changetype)
1382                 fd->ft = fd_types[type - 1];
1383         fd->flags |= FD_OPEN;
1384
1385         /*
1386          * Clearing the DMA overrun counter at open time is a bit messy.
1387          * Since we're only managing one counter per controller, opening
1388          * the second drive could mess it up.  Anyway, if the DMA overrun
1389          * condition is really persistent, it will eventually time out
1390          * still.  OTOH, clearing it here will ensure we'll at least start
1391          * trying again after a previous (maybe even long ago) failure.
1392          * Also, this is merely a stop-gap measure only that should not
1393          * happen during normal operation, so we can tolerate it to be a
1394          * bit sloppy about this.
1395          */
1396         fdc->dma_overruns = 0;
1397
1398         /*
1399          * Set disk parameters for the disk management layer.
1400          *
1401          * Note that we do not set RAWEXTENSIONS here.  We override
1402          * the minor numbers in the raw-extension range and handle them
1403          * directly.
1404          */
1405         bzero(&info, sizeof(info));
1406         ft = &fd->ft;
1407         info.d_media_blksize = 128 << ft->secsize;
1408         info.d_media_blocks = ft->size;
1409         info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1410         info.d_nheads = ft->heads;
1411         info.d_secpertrack = ft->sectrac;
1412         info.d_secpercyl = ft->sectrac * ft->heads;
1413         info.d_ncylinders = ft->size / info.d_secpercyl;
1414         disk_setdiskinfo(&fd->disk, &info);
1415
1416         return 0;
1417 }
1418
1419 int
1420 fdclose(struct dev_close_args *ap)
1421 {
1422         cdev_t dev = ap->a_head.a_dev;
1423         fdu_t fdu = dkunit(dev);
1424         struct fd_data *fd;
1425
1426         fd = devclass_get_softc(fd_devclass, fdu);
1427         fd->flags &= ~FD_OPEN;
1428         fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1429
1430         return (0);
1431 }
1432
1433 /****************************************************************************/
1434 /*                               fdstrategy                                 */
1435 /****************************************************************************/
1436 int
1437 fdstrategy(struct dev_strategy_args *ap)
1438 {
1439         cdev_t dev = ap->a_head.a_dev;
1440         struct bio *bio = ap->a_bio;
1441         struct buf *bp = bio->bio_buf;
1442         unsigned nblocks, blknum, cando;
1443         fdu_t   fdu;
1444         fdc_p   fdc;
1445         fd_p    fd;
1446         size_t  fdblk;
1447
1448         fdu = dkunit(dev);
1449         fd = devclass_get_softc(fd_devclass, fdu);
1450         if (fd == 0)
1451                 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1452                       (u_long)major(dev), (u_long)minor(dev));
1453         fdc = fd->fdc;
1454         if (fd->type == NO_TYPE) {
1455                 bp->b_error = ENXIO;
1456                 bp->b_flags |= B_ERROR;
1457                 goto bad;
1458         };
1459
1460         fdblk = 128 << (fd->ft.secsize);
1461         if (bp->b_cmd != BUF_CMD_FORMAT) {
1462                 if (bio->bio_offset < 0) {
1463                         kprintf(
1464                 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n",
1465                                fdu, bio->bio_offset, bp->b_bcount);
1466                         bp->b_error = EINVAL;
1467                         bp->b_flags |= B_ERROR;
1468                         goto bad;
1469                 }
1470                 if ((bp->b_bcount % fdblk) != 0) {
1471                         bp->b_error = EINVAL;
1472                         bp->b_flags |= B_ERROR;
1473                         goto bad;
1474                 }
1475         }
1476
1477         /*
1478          * Set up block calculations.
1479          */
1480         if (bio->bio_offset > 20000000LL * fdblk) {
1481                 /*
1482                  * Reject unreasonably high block number, prevent the
1483                  * multiplication below from overflowing.
1484                  */
1485                 bp->b_error = EINVAL;
1486                 bp->b_flags |= B_ERROR;
1487                 goto bad;
1488         }
1489         blknum = (unsigned)(bio->bio_offset / fdblk);
1490         nblocks = fd->ft.size;
1491         bp->b_resid = 0;
1492         if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1493                 if (blknum <= nblocks) {
1494                         cando = (nblocks - blknum) * fdblk;
1495                         bp->b_resid = bp->b_bcount - cando;
1496                         if (cando == 0)
1497                                 goto bad;       /* not actually bad but EOF */
1498                 } else {
1499                         bp->b_error = EINVAL;
1500                         bp->b_flags |= B_ERROR;
1501                         goto bad;
1502                 }
1503         }
1504         crit_enter();
1505         bio->bio_driver_info = dev;
1506         bioqdisksort(&fdc->bio_queue, bio);
1507         callout_stop(&fd->toffhandle);
1508
1509         /* Tell devstat we are starting on the transaction */
1510         devstat_start_transaction(&fd->device_stats);
1511         device_busy(fd->dev);
1512
1513         fdstart(fdc);
1514         crit_exit();
1515         return(0);
1516
1517 bad:
1518         biodone(bio);
1519         return(0);
1520 }
1521
1522 /***************************************************************\
1523 *                               fdstart                         *
1524 * We have just queued something.. if the controller is not busy *
1525 * then simulate the case where it has just finished a command   *
1526 * So that it (the interrupt routine) looks on the queue for more*
1527 * work to do and picks up what we just added.                   *
1528 * If the controller is already busy, we need do nothing, as it  *
1529 * will pick up our work when the present work completes         *
1530 \***************************************************************/
1531 static void
1532 fdstart(struct fdc_data *fdc)
1533 {
1534         crit_enter();
1535         if(fdc->state == DEVIDLE)
1536         {
1537                 fdc_intr(fdc);
1538         }
1539         crit_exit();
1540 }
1541
1542 static void
1543 fd_iotimeout(void *xfdc)
1544 {
1545         fdc_p fdc;
1546
1547         fdc = xfdc;
1548         TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1549
1550         /*
1551          * Due to IBM's brain-dead design, the FDC has a faked ready
1552          * signal, hardwired to ready == true. Thus, any command
1553          * issued if there's no diskette in the drive will _never_
1554          * complete, and must be aborted by resetting the FDC.
1555          * Many thanks, Big Blue!
1556          * The FDC must not be reset directly, since that would
1557          * interfere with the state machine.  Instead, pretend that
1558          * the command completed but was invalid.  The state machine
1559          * will reset the FDC and retry once.
1560          */
1561         crit_enter();
1562         fdc->status[0] = NE7_ST0_IC_IV;
1563         fdc->flags &= ~FDC_STAT_VALID;
1564         fdc->state = IOTIMEDOUT;
1565         fdc_intr(fdc);
1566         crit_exit();
1567 }
1568
1569 /* just ensure it is running in a critical section */
1570 static void
1571 fd_pseudointr(void *xfdc)
1572 {
1573         crit_enter();
1574         fdc_intr(xfdc);
1575         crit_exit();
1576 }
1577
1578 /***********************************************************************\
1579 *                                 fdintr                                *
1580 * keep calling the state machine until it returns a 0                   *
1581 * ALWAYS called at SPLBIO                                               *
1582 \***********************************************************************/
1583 static void
1584 fdc_intr(void *xfdc)
1585 {
1586         fdc_p fdc = xfdc;
1587         while(fdstate(fdc))
1588                 ;
1589 }
1590
1591 /*
1592  * magic pseudo-DMA initialization for YE FDC. Sets count and
1593  * direction
1594  */
1595 #define SET_BCDR(fdc,wr,cnt,port) \
1596         bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port,  \
1597             ((cnt)-1) & 0xff);                                           \
1598         bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1599             ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1600
1601 /*
1602  * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1603  */
1604 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
1605 {
1606         u_char *cptr = (u_char *)addr;
1607
1608         if (cmd == BUF_CMD_READ) {
1609                 if (fdc->state != PIOREAD) {
1610                         fdc->state = PIOREAD;
1611                         return(0);
1612                 };
1613                 SET_BCDR(fdc, 0, count, 0);
1614                 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1615                     FDC_YE_DATAPORT, cptr, count);
1616         } else {
1617                 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1618                     FDC_YE_DATAPORT, cptr, count);
1619                 SET_BCDR(fdc, 0, count, 0);
1620         };
1621         return(1);
1622 }
1623
1624 /***********************************************************************\
1625 * The controller state machine.                                         *
1626 * if it returns a non zero value, it should be called again immediatly  *
1627 \***********************************************************************/
1628 static int
1629 fdstate(fdc_p fdc)
1630 {
1631         int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1632         unsigned blknum = 0, b_cylinder = 0;
1633         fdu_t fdu = fdc->fdu;
1634         fd_p fd;
1635         struct bio *bio;
1636         struct buf *bp;
1637         struct fd_formb *finfo = NULL;
1638         size_t fdblk;
1639         cdev_t dev;
1640
1641         bio = fdc->bio;
1642         if (bio == NULL) {
1643                 bio = bioq_first(&fdc->bio_queue);
1644                 if (bio != NULL) {
1645                         bioq_remove(&fdc->bio_queue, bio);
1646                         fdc->bio = bio;
1647                 }
1648         }
1649         if (bio == NULL) {
1650                 /***********************************************\
1651                 * nothing left for this controller to do        *
1652                 * Force into the IDLE state,                    *
1653                 \***********************************************/
1654                 fdc->state = DEVIDLE;
1655                 if (fdc->fd) {
1656                         device_printf(fdc->fdc_dev,
1657                             "unexpected valid fd pointer\n");
1658                         fdc->fd = (fd_p) 0;
1659                         fdc->fdu = -1;
1660                 }
1661                 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1662                 return (0);
1663         }
1664         bp = bio->bio_buf;
1665         dev = bio->bio_driver_info;
1666
1667         fdu = dkunit(dev);
1668         fd = devclass_get_softc(fd_devclass, fdu);
1669         fdblk = 128 << fd->ft.secsize;
1670         if (fdc->fd && (fd != fdc->fd))
1671                 device_printf(fd->dev, "confused fd pointers\n");
1672         read = (bp->b_cmd == BUF_CMD_READ);
1673         format = (bp->b_cmd == BUF_CMD_FORMAT);
1674         if (format) {
1675                 finfo = (struct fd_formb *)bp->b_data;
1676                 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1677                         - (char *)finfo;
1678         }
1679         if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1680                 blknum = (unsigned)(bio->bio_offset / fdblk) +
1681                          fd->skip  /fdblk;
1682                 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads);
1683         }
1684         TRACE1("fd%d", fdu);
1685         TRACE1("[%s]", fdstates[fdc->state]);
1686         TRACE1("(0x%x)", fd->flags);
1687         callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
1688         switch (fdc->state)
1689         {
1690         case DEVIDLE:
1691         case FINDWORK:  /* we have found new work */
1692                 fdc->retry = 0;
1693                 fd->skip = 0;
1694                 fdc->fd = fd;
1695                 fdc->fdu = fdu;
1696                 fdc->fdctl_wr(fdc, fd->ft.trans);
1697                 TRACE1("[0x%x->FDCTL]", fd->ft.trans);
1698                 /*******************************************************\
1699                 * If the next drive has a motor startup pending, then   *
1700                 * it will start up in its own good time         *
1701                 \*******************************************************/
1702                 if(fd->flags & FD_MOTOR_WAIT) {
1703                         fdc->state = MOTORWAIT;
1704                         return (0); /* come back later */
1705                 }
1706                 /*******************************************************\
1707                 * Maybe if it's not starting, it SHOULD be starting     *
1708                 \*******************************************************/
1709                 if (!(fd->flags & FD_MOTOR))
1710                 {
1711                         fdc->state = MOTORWAIT;
1712                         fd_turnon(fd);
1713                         return (0);
1714                 }
1715                 else    /* at least make sure we are selected */
1716                 {
1717                         set_motor(fdc, fd->fdsu, TURNON);
1718                 }
1719                 if (fdc->flags & FDC_NEEDS_RESET) {
1720                         fdc->state = RESETCTLR;
1721                         fdc->flags &= ~FDC_NEEDS_RESET;
1722                 } else
1723                         fdc->state = DOSEEK;
1724                 break;
1725         case DOSEEK:
1726                 if (b_cylinder == (unsigned)fd->track)
1727                 {
1728                         fdc->state = SEEKCOMPLETE;
1729                         break;
1730                 }
1731                 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1732                            fd->fdsu, b_cylinder * fd->ft.steptrac,
1733                            0))
1734                 {
1735                         /*
1736                          * seek command not accepted, looks like
1737                          * the FDC went off to the Saints...
1738                          */
1739                         fdc->retry = 6; /* try a reset */
1740                         return(retrier(fdc));
1741                 }
1742                 fd->track = FD_NO_TRACK;
1743                 fdc->state = SEEKWAIT;
1744                 return(0);      /* will return later */
1745         case SEEKWAIT:
1746                 /* allow heads to settle */
1747                 callout_reset(&fdc->pseudointr_ch, hz / 16,
1748                                fd_pseudointr, fdc);
1749                 fdc->state = SEEKCOMPLETE;
1750                 return(0);      /* will return later */
1751         case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1752                 /* Make sure seek really happened*/
1753                 if(fd->track == FD_NO_TRACK) {
1754                         int descyl = b_cylinder * fd->ft.steptrac;
1755                         do {
1756                                 /*
1757                                  * This might be a "ready changed" interrupt,
1758                                  * which cannot really happen since the
1759                                  * RDY pin is hardwired to + 5 volts.  This
1760                                  * generally indicates a "bouncing" intr
1761                                  * line, so do one of the following:
1762                                  *
1763                                  * When running on an enhanced FDC that is
1764                                  * known to not go stuck after responding
1765                                  * with INVALID, fetch all interrupt states
1766                                  * until seeing either an INVALID or a
1767                                  * real interrupt condition.
1768                                  *
1769                                  * When running on a dumb old NE765, give
1770                                  * up immediately.  The controller will
1771                                  * provide up to four dummy RC interrupt
1772                                  * conditions right after reset (for the
1773                                  * corresponding four drives), so this is
1774                                  * our only chance to get notice that it
1775                                  * was not the FDC that caused the interrupt.
1776                                  */
1777                                 if (fd_sense_int(fdc, &st0, &cyl)
1778                                     == FD_NOT_VALID)
1779                                         return 0;
1780                                 if(fdc->fdct == FDC_NE765
1781                                    && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1782                                         return 0; /* hope for a real intr */
1783                         } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1784
1785                         if (0 == descyl) {
1786                                 int failed = 0;
1787                                 /*
1788                                  * seek to cyl 0 requested; make sure we are
1789                                  * really there
1790                                  */
1791                                 if (fd_sense_drive_status(fdc, &st3))
1792                                         failed = 1;
1793                                 if ((st3 & NE7_ST3_T0) == 0) {
1794                                         kprintf(
1795                 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1796                                                fdu, st3, NE7_ST3BITS);
1797                                         failed = 1;
1798                                 }
1799
1800                                 if (failed) {
1801                                         if(fdc->retry < 3)
1802                                                 fdc->retry = 3;
1803                                         return (retrier(fdc));
1804                                 }
1805                         }
1806
1807                         if (cyl != descyl) {
1808                                 kprintf(
1809                 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1810                                        fdu, descyl, cyl, st0);
1811                                 if (fdc->retry < 3)
1812                                         fdc->retry = 3;
1813                                 return (retrier(fdc));
1814                         }
1815                 }
1816
1817                 fd->track = b_cylinder;
1818                 if (!(fdc->flags & FDC_NODMA)) {
1819                         isa_dmastart(isa_dmabp(bp),
1820                                      bp->b_data+fd->skip,
1821                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
1822                 }
1823                 sectrac = fd->ft.sectrac;
1824                 sec = blknum %  (sectrac * fd->ft.heads);
1825                 head = sec / sectrac;
1826                 sec = sec % sectrac + 1;
1827                 fd->hddrv = ((head&1)<<2)+fdu;
1828
1829                 if(format || !read)
1830                 {
1831                         /* make sure the drive is writable */
1832                         if(fd_sense_drive_status(fdc, &st3) != 0)
1833                         {
1834                                 /* stuck controller? */
1835                                 if (!(fdc->flags & FDC_NODMA))
1836                                         isa_dmadone(isa_dmabp(bp),
1837                                                     bp->b_data + fd->skip,
1838                                                     format ? bp->b_bcount : fdblk,
1839                                                     fdc->dmachan);
1840                                 fdc->retry = 6; /* reset the beast */
1841                                 return (retrier(fdc));
1842                         }
1843                         if(st3 & NE7_ST3_WP)
1844                         {
1845                                 /*
1846                                  * XXX YES! this is ugly.
1847                                  * in order to force the current operation
1848                                  * to fail, we will have to fake an FDC
1849                                  * error - all error handling is done
1850                                  * by the retrier()
1851                                  */
1852                                 fdc->status[0] = NE7_ST0_IC_AT;
1853                                 fdc->status[1] = NE7_ST1_NW;
1854                                 fdc->status[2] = 0;
1855                                 fdc->status[3] = fd->track;
1856                                 fdc->status[4] = head;
1857                                 fdc->status[5] = sec;
1858                                 fdc->retry = 8; /* break out immediately */
1859                                 fdc->state = IOTIMEDOUT; /* not really... */
1860                                 return (1);
1861                         }
1862                 }
1863
1864                 if (format) {
1865                         if (fdc->flags & FDC_NODMA) {
1866                                 /*
1867                                  * This seems to be necessary for
1868                                  * whatever obscure reason; if we omit
1869                                  * it, we end up filling the sector ID
1870                                  * fields of the newly formatted track
1871                                  * entirely with garbage, causing
1872                                  * `wrong cylinder' errors all over
1873                                  * the place when trying to read them
1874                                  * back.
1875                                  *
1876                                  * Umpf.
1877                                  */
1878                                 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1879
1880                                 (void)fdcpio(fdc,bp->b_cmd,
1881                                         bp->b_data+fd->skip,
1882                                         bp->b_bcount);
1883
1884                         }
1885                         /* formatting */
1886                         if(fd_cmd(fdc, 6,  NE7CMD_FORMAT, head << 2 | fdu,
1887                                   finfo->fd_formb_secshift,
1888                                   finfo->fd_formb_nsecs,
1889                                   finfo->fd_formb_gaplen,
1890                                   finfo->fd_formb_fillbyte, 0)) {
1891                                 /* controller fell over */
1892                                 if (!(fdc->flags & FDC_NODMA))
1893                                         isa_dmadone(isa_dmabp(bp),
1894                                                     bp->b_data + fd->skip,
1895                                                     format ? bp->b_bcount : fdblk,
1896                                                     fdc->dmachan);
1897                                 fdc->retry = 6;
1898                                 return (retrier(fdc));
1899                         }
1900                 } else {
1901                         if (fdc->flags & FDC_NODMA) {
1902                                 /*
1903                                  * this seems to be necessary even when
1904                                  * reading data
1905                                  */
1906                                 SET_BCDR(fdc, 1, fdblk, 0);
1907
1908                                 /*
1909                                  * perform the write pseudo-DMA before
1910                                  * the WRITE command is sent
1911                                  */
1912                                 if (!read)
1913                                         (void)fdcpio(fdc,bp->b_cmd,
1914                                             bp->b_data+fd->skip,
1915                                             fdblk);
1916                         }
1917                         if (fd_cmd(fdc, 9,
1918                                    (read ? NE7CMD_READ : NE7CMD_WRITE),
1919                                    head << 2 | fdu,  /* head & unit */
1920                                    fd->track,        /* track */
1921                                    head,
1922                                    sec,              /* sector + 1 */
1923                                    fd->ft.secsize,   /* sector size */
1924                                    sectrac,          /* sectors/track */
1925                                    fd->ft.gap,       /* gap size */
1926                                    fd->ft.datalen,   /* data length */
1927                                    0)) {
1928                                 /* the beast is sleeping again */
1929                                 if (!(fdc->flags & FDC_NODMA))
1930                                         isa_dmadone(isa_dmabp(bp),
1931                                                     bp->b_data + fd->skip,
1932                                                     format ? bp->b_bcount : fdblk,
1933                                                     fdc->dmachan);
1934                                 fdc->retry = 6;
1935                                 return (retrier(fdc));
1936                         }
1937                 }
1938                 if (fdc->flags & FDC_NODMA)
1939                         /*
1940                          * if this is a read, then simply await interrupt
1941                          * before performing PIO
1942                          */
1943                         if (read && !fdcpio(fdc,bp->b_cmd,
1944                             bp->b_data+fd->skip,fdblk)) {
1945                                 callout_reset(&fd->tohandle, hz,
1946                                                 fd_iotimeout, fdc);
1947                                 return(0);      /* will return later */
1948                         };
1949
1950                 /*
1951                  * write (or format) operation will fall through and
1952                  * await completion interrupt
1953                  */
1954                 fdc->state = IOCOMPLETE;
1955                 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
1956                 return (0);     /* will return later */
1957         case PIOREAD:
1958                 /*
1959                  * actually perform the PIO read.  The IOCOMPLETE case
1960                  * removes the timeout for us.
1961                  */
1962                 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
1963                 fdc->state = IOCOMPLETE;
1964                 /* FALLTHROUGH */
1965         case IOCOMPLETE: /* IO DONE, post-analyze */
1966                 callout_stop(&fd->tohandle);
1967
1968                 if (fd_read_status(fdc, fd->fdsu)) {
1969                         if (!(fdc->flags & FDC_NODMA)) {
1970                                 isa_dmadone(isa_dmabp(bp),
1971                                             bp->b_data + fd->skip,
1972                                             format ? bp->b_bcount : fdblk,
1973                                             fdc->dmachan);
1974                         }
1975                         if (fdc->retry < 6)
1976                                 fdc->retry = 6; /* force a reset */
1977                         return (retrier(fdc));
1978                 }
1979
1980                 fdc->state = IOTIMEDOUT;
1981
1982                 /* FALLTHROUGH */
1983
1984         case IOTIMEDOUT:
1985                 if (!(fdc->flags & FDC_NODMA)) {
1986                         isa_dmadone(isa_dmabp(bp),
1987                                     bp->b_data + fd->skip,
1988                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
1989                 }
1990                 if (fdc->status[0] & NE7_ST0_IC) {
1991                         if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1992                             && fdc->status[1] & NE7_ST1_OR) {
1993                                 /*
1994                                  * DMA overrun. Someone hogged the bus and
1995                                  * didn't release it in time for the next
1996                                  * FDC transfer.
1997                                  *
1998                                  * We normally restart this without bumping
1999                                  * the retry counter.  However, in case
2000                                  * something is seriously messed up (like
2001                                  * broken hardware), we rather limit the
2002                                  * number of retries so the IO operation
2003                                  * doesn't block indefinately.
2004                                  */
2005                                 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
2006                                         fdc->state = SEEKCOMPLETE;
2007                                         return (1);
2008                                 } /* else fall through */
2009                         }
2010                         if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
2011                                 && fdc->retry < 6)
2012                                 fdc->retry = 6; /* force a reset */
2013                         else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2014                                 && fdc->status[2] & NE7_ST2_WC
2015                                 && fdc->retry < 3)
2016                                 fdc->retry = 3; /* force recalibrate */
2017                         return (retrier(fdc));
2018                 }
2019                 /* All OK */
2020                 /* Operation successful, retry DMA overruns again next time. */
2021                 fdc->dma_overruns = 0;
2022                 fd->skip += fdblk;
2023                 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
2024                         /* set up next transfer */
2025                         fdc->state = DOSEEK;
2026                 } else {
2027                         /* ALL DONE */
2028                         fd->skip = 0;
2029                         fdc->bio = NULL;
2030                         device_unbusy(fd->dev);
2031                         devstat_end_transaction_buf(&fd->device_stats, bp);
2032                         biodone(bio);
2033                         fdc->fd = (fd_p) 0;
2034                         fdc->fdu = -1;
2035                         fdc->state = FINDWORK;
2036                 }
2037                 return (1);
2038         case RESETCTLR:
2039                 fdc_reset(fdc);
2040                 fdc->retry++;
2041                 fdc->state = RESETCOMPLETE;
2042                 return (0);
2043         case RESETCOMPLETE:
2044                 /*
2045                  * Discard all the results from the reset so that they
2046                  * can't cause an unexpected interrupt later.
2047                  */
2048                 for (i = 0; i < 4; i++)
2049                         (void)fd_sense_int(fdc, &st0, &cyl);
2050                 fdc->state = STARTRECAL;
2051                 /* Fall through. */
2052         case STARTRECAL:
2053                 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
2054                         /* arrgl */
2055                         fdc->retry = 6;
2056                         return (retrier(fdc));
2057                 }
2058                 fdc->state = RECALWAIT;
2059                 return (0);     /* will return later */
2060         case RECALWAIT:
2061                 /* allow heads to settle */
2062                 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
2063                 fdc->state = RECALCOMPLETE;
2064                 return (0);     /* will return later */
2065         case RECALCOMPLETE:
2066                 do {
2067                         /*
2068                          * See SEEKCOMPLETE for a comment on this:
2069                          */
2070                         if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2071                                 return 0;
2072                         if(fdc->fdct == FDC_NE765
2073                            && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2074                                 return 0; /* hope for a real intr */
2075                 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2076                 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2077                 {
2078                         if(fdc->retry > 3)
2079                                 /*
2080                                  * a recalibrate from beyond cylinder 77
2081                                  * will "fail" due to the FDC limitations;
2082                                  * since people used to complain much about
2083                                  * the failure message, try not logging
2084                                  * this one if it seems to be the first
2085                                  * time in a line
2086                                  */
2087                                 kprintf("fd%d: recal failed ST0 %b cyl %d\n",
2088                                        fdu, st0, NE7_ST0BITS, cyl);
2089                         if(fdc->retry < 3) fdc->retry = 3;
2090                         return (retrier(fdc));
2091                 }
2092                 fd->track = 0;
2093                 /* Seek (probably) necessary */
2094                 fdc->state = DOSEEK;
2095                 return (1);     /* will return immediatly */
2096         case MOTORWAIT:
2097                 if(fd->flags & FD_MOTOR_WAIT)
2098                 {
2099                         return (0); /* time's not up yet */
2100                 }
2101                 if (fdc->flags & FDC_NEEDS_RESET) {
2102                         fdc->state = RESETCTLR;
2103                         fdc->flags &= ~FDC_NEEDS_RESET;
2104                 } else {
2105                         /*
2106                          * If all motors were off, then the controller was
2107                          * reset, so it has lost track of the current
2108                          * cylinder.  Recalibrate to handle this case.
2109                          * But first, discard the results of the reset.
2110                          */
2111                         fdc->state = RESETCOMPLETE;
2112                 }
2113                 return (1);     /* will return immediatly */
2114         default:
2115                 device_printf(fdc->fdc_dev, "unexpected FD int->");
2116                 if (fd_read_status(fdc, fd->fdsu) == 0)
2117                         kprintf("FDC status :%x %x %x %x %x %x %x   ",
2118                                fdc->status[0],
2119                                fdc->status[1],
2120                                fdc->status[2],
2121                                fdc->status[3],
2122                                fdc->status[4],
2123                                fdc->status[5],
2124                                fdc->status[6] );
2125                 else
2126                         kprintf("No status available   ");
2127                 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2128                 {
2129                         kprintf("[controller is dead now]\n");
2130                         return (0);
2131                 }
2132                 kprintf("ST0 = %x, PCN = %x\n", st0, cyl);
2133                 return (0);
2134         }
2135         /*XXX confusing: some branches return immediately, others end up here*/
2136         return (1); /* Come back immediatly to new state */
2137 }
2138
2139 static int
2140 retrier(struct fdc_data *fdc)
2141 {
2142         struct bio *bio;
2143         struct buf *bp;
2144         struct fd_data *fd;
2145         cdev_t dev;
2146         int fdu;
2147
2148         bio = fdc->bio;
2149         bp = bio->bio_buf;
2150         dev = bio->bio_driver_info;
2151
2152         /* XXX shouldn't this be cached somewhere?  */
2153         fdu = dkunit(dev);
2154         fd = devclass_get_softc(fd_devclass, fdu);
2155         if (fd->options & FDOPT_NORETRY)
2156                 goto fail;
2157
2158         switch (fdc->retry) {
2159         case 0: case 1: case 2:
2160                 fdc->state = SEEKCOMPLETE;
2161                 break;
2162         case 3: case 4: case 5:
2163                 fdc->state = STARTRECAL;
2164                 break;
2165         case 6:
2166                 fdc->state = RESETCTLR;
2167                 break;
2168         case 7:
2169                 break;
2170         default:
2171         fail:
2172                 {
2173                         int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2174
2175                         if (printerror) {
2176                                 /*
2177                                  * note: use the correct device for more
2178                                  * verbose error reporting.
2179                                  */
2180                                 diskerr(bio, dev,
2181                                         "hard error", LOG_PRINTF,
2182                                         fdc->fd->skip);
2183                         }
2184                         if (printerror) {
2185                                 if (fdc->flags & FDC_STAT_VALID)
2186                                         kprintf(
2187                         " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2188                                                fdc->status[0], NE7_ST0BITS,
2189                                                fdc->status[1], NE7_ST1BITS,
2190                                                fdc->status[2], NE7_ST2BITS,
2191                                                fdc->status[3], fdc->status[4],
2192                                                fdc->status[5]);
2193                                 else
2194                                         kprintf(" (No status)\n");
2195                         }
2196                 }
2197                 bp->b_flags |= B_ERROR;
2198                 bp->b_error = EIO;
2199                 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2200                 fdc->bio = NULL;
2201                 fdc->fd->skip = 0;
2202                 device_unbusy(fd->dev);
2203                 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2204                 biodone(bio);
2205                 fdc->state = FINDWORK;
2206                 fdc->flags |= FDC_NEEDS_RESET;
2207                 fdc->fd = (fd_p) 0;
2208                 fdc->fdu = -1;
2209                 return (1);
2210         }
2211         fdc->retry++;
2212         return (1);
2213 }
2214
2215 static void
2216 fdformat_wakeup(struct bio *bio)
2217 {
2218         bio->bio_buf->b_cmd = BUF_CMD_DONE;
2219         wakeup(bio);
2220 }
2221
2222 static int
2223 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred)
2224 {
2225         fdu_t   fdu;
2226         fd_p    fd;
2227         struct buf *bp;
2228         int rv = 0;
2229         size_t fdblk;
2230
2231         fdu     = dkunit(dev);
2232         fd      = devclass_get_softc(fd_devclass, fdu);
2233         fdblk = 128 << fd->ft.secsize;
2234
2235         /* set up a buffer header for fdstrategy() */
2236         bp = getpbuf(NULL);
2237         bp->b_cmd = BUF_CMD_FORMAT;
2238
2239         /*
2240          * calculate a fake blkno, so fdstrategy() would initiate a
2241          * seek to the requested cylinder
2242          */
2243         bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
2244                 (fd->ft.sectrac * fd->ft.heads)
2245                 + finfo->head * fd->ft.sectrac) * fdblk;
2246         bp->b_bio1.bio_driver_info = dev;
2247         bp->b_bio1.bio_done = fdformat_wakeup;
2248
2249         bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2250         bp->b_data = (caddr_t)finfo;
2251
2252         /* now do the format */
2253         dev_dstrategy(dev, &bp->b_bio1);
2254
2255         /* ...and wait for it to complete */
2256         crit_enter();
2257         while (bp->b_cmd != BUF_CMD_DONE) {
2258                 rv = tsleep(&bp->b_bio1, 0, "fdform", 20 * hz);
2259                 if (rv == EWOULDBLOCK)
2260                         break;
2261         }
2262         crit_exit();
2263
2264         if (rv == EWOULDBLOCK) {
2265                 /* timed out */
2266                 rv = EIO;
2267                 device_unbusy(fd->dev);
2268                 biodone(&bp->b_bio1);
2269         }
2270         if (bp->b_flags & B_ERROR)
2271                 rv = bp->b_error;
2272         /*
2273          * allow the process to be swapped
2274          */
2275         relpbuf(bp, NULL);
2276         return rv;
2277 }
2278
2279 /*
2280  * TODO: don't allocate buffer on stack.
2281  */
2282
2283 static int
2284 fdioctl(struct dev_ioctl_args *ap)
2285 {
2286         cdev_t dev = ap->a_head.a_dev;
2287         fdu_t   fdu = dkunit(dev);
2288         fd_p    fd = devclass_get_softc(fd_devclass, fdu);
2289         size_t fdblk;
2290         struct fdc_status *fsp;
2291         int error = 0;
2292
2293         fdblk = 128 << fd->ft.secsize;
2294
2295         switch (ap->a_cmd) {
2296         case FD_FORM:
2297                 if ((ap->a_fflag & FWRITE) == 0)
2298                         error = EBADF;  /* must be opened for writing */
2299                 else if (((struct fd_formb *)ap->a_data)->format_version !=
2300                         FD_FORMAT_VERSION)
2301                         error = EINVAL; /* wrong version of formatting prog */
2302                 else
2303                         error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred);
2304                 break;
2305
2306         case FD_GTYPE:                  /* get drive type */
2307                 *(struct fd_type *)ap->a_data = fd->ft;
2308                 break;
2309
2310         case FD_STYPE:                  /* set drive type */
2311                 /* this is considered harmful; only allow for superuser */
2312                 if (suser_cred(ap->a_cred, 0) != 0)
2313                         return EPERM;
2314                 fd->ft = *(struct fd_type *)ap->a_data;
2315                 break;
2316
2317         case FD_GOPTS:                  /* get drive options */
2318                 *(int *)ap->a_data = fd->options;
2319                 break;
2320
2321         case FD_SOPTS:                  /* set drive options */
2322                 fd->options = *(int *)ap->a_data;
2323                 break;
2324
2325         case FD_GSTAT:
2326                 fsp = (struct fdc_status *)ap->a_data;
2327                 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2328                         return EINVAL;
2329                 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2330                 break;
2331
2332         default:
2333                 error = ENOTTY;
2334                 break;
2335         }
2336         return (error);
2337 }
2338
2339 /*
2340  * Hello emacs, these are the
2341  * Local Variables:
2342  *  c-indent-level:               8
2343  *  c-continued-statement-offset: 8
2344  *  c-continued-brace-offset:     0
2345  *  c-brace-offset:              -8
2346  *  c-brace-imaginary-offset:     0
2347  *  c-argdecl-indent:             8
2348  *  c-label-offset:              -8
2349  *  c++-hanging-braces:           1
2350  *  c++-access-specifier-offset: -8
2351  *  c++-empty-arglist-indent:     8
2352  *  c++-friend-offset:            0
2353  * End:
2354  */