sys/dev/disk/fd/fd.c

   1 /*
   2  * Copyright (c) 1990 The Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Don Ahn.
   7  *
   8  * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu)
   9  * aided by the Linux floppy driver modifications from David Bateman
  10  * (dbateman@eng.uts.edu.au).
  11  *
  12  * Copyright (c) 1993, 1994 by
  13  *  jc@irbs.UUCP (John Capo)
  14  *  vak@zebub.msk.su (Serge Vakulenko)
  15  *  ache@astral.msk.su (Andrew A. Chernov)
  16  *
  17  * Copyright (c) 1993, 1994, 1995 by
  18  *  joerg_wunsch@uriah.sax.de (Joerg Wunsch)
  19  *  dufault@hda.com (Peter Dufault)
  20  *
  21  * Copyright (c) 2001 Joerg Wunsch,
  22  *  joerg_wunsch@uriah.sax.de (Joerg Wunsch)
  23  *
  24  * Redistribution and use in source and binary forms, with or without
  25  * modification, are permitted provided that the following conditions
  26  * are met:
  27  * 1. Redistributions of source code must retain the above copyright
  28  *    notice, this list of conditions and the following disclaimer.
  29  * 2. Redistributions in binary form must reproduce the above copyright
  30  *    notice, this list of conditions and the following disclaimer in the
  31  *    documentation and/or other materials provided with the distribution.
  32  * 3. All advertising materials mentioning features or use of this software
  33  *    must display the following acknowledgement:
  34  *      This product includes software developed by the University of
  35  *      California, Berkeley and its contributors.
  36  * 4. Neither the name of the University nor the names of its contributors
  37  *    may be used to endorse or promote products derived from this software
  38  *    without specific prior written permission.
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  *      from:   @(#)fd.c        7.4 (Berkeley) 5/25/91
  53  * $FreeBSD: src/sys/isa/fd.c,v 1.176.2.8 2002/05/15 21:56:14 joerg Exp $
  54  *
  55  */
  56
  57 #include "opt_fdc.h"
  58
  59 #include <sys/param.h>
  60 #include <sys/systm.h>
  61 #include <sys/kernel.h>
  62 #include <sys/buf.h>
  63 #include <sys/bus.h>
  64 #include <sys/conf.h>
  65 #include <sys/diskslice.h>
  66 #include <sys/disk.h>
  67 #include <sys/devicestat.h>
  68 #include <sys/fcntl.h>
  69 #include <sys/malloc.h>
  70 #include <sys/module.h>
  71 #include <sys/proc.h>
  72 #include <sys/priv.h>
  73 #include <sys/syslog.h>
  74 #include <sys/device.h>
  75 #include <sys/rman.h>
  76 #include <sys/buf2.h>
  77 #include <sys/thread2.h>
  78
  79 #include <machine/clock.h>
  80 #include <machine/inttypes.h>
  81 #include <machine/ioctl_fd.h>
  82 #include <machine/stdarg.h>
  83
  84 #include <bus/isa/isavar.h>
  85 #include <bus/isa/isareg.h>
  86 #include "fdreg.h"
  87 #include "fdc.h"
  88 #include <bus/isa/rtc.h>
  89
  90 /* configuration flags */
  91 #define FDC_PRETEND_D0  (1 << 0)        /* pretend drive 0 to be there */
  92 #define FDC_NO_FIFO     (1 << 2)        /* do not enable FIFO  */
  93
  94 /* internally used only, not really from CMOS: */
  95 #define RTCFDT_144M_PRETENDED   0x1000
  96
  97 /* error returns for fd_cmd() */
  98 #define FD_FAILED -1
  99 #define FD_NOT_VALID -2
 100 #define FDC_ERRMAX      100     /* do not log more */
 101 /*
 102  * Stop retrying after this many DMA overruns.  Since each retry takes
 103  * one revolution, with 300 rpm., 25 retries take approximately 10
 104  * seconds which the read attempt will block in case the DMA overrun
 105  * is persistent.
 106  */
 107 #define FDC_DMAOV_MAX   25
 108
 109 /*
 110  * Timeout value for the PIO loops to wait until the FDC main status
 111  * register matches our expectations (request for master, direction
 112  * bit).  This is supposed to be a number of microseconds, although
 113  * timing might actually not be very accurate.
 114  *
 115  * Timeouts of 100 msec are believed to be required for some broken
 116  * (old) hardware.
 117  */
 118 #define FDSTS_TIMEOUT   100000
 119
 120 #define NUMTYPES 17
 121 #define NUMDENS  (NUMTYPES - 7)
 122
 123 /* These defines (-1) must match index for fd_types */
 124 #define F_TAPE_TYPE     0x020   /* bit for fd_types to indicate tape */
 125 #define NO_TYPE         0       /* must match NO_TYPE in ft.c */
 126 #define FD_1720         1
 127 #define FD_1480         2
 128 #define FD_1440         3
 129 #define FD_1200         4
 130 #define FD_820          5
 131 #define FD_800          6
 132 #define FD_720          7
 133 #define FD_360          8
 134 #define FD_640          9
 135 #define FD_1232         10
 136
 137 #define FD_1480in5_25   11
 138 #define FD_1440in5_25   12
 139 #define FD_820in5_25    13
 140 #define FD_800in5_25    14
 141 #define FD_720in5_25    15
 142 #define FD_360in5_25    16
 143 #define FD_640in5_25    17
 144
 145
 146 static struct fd_type fd_types[NUMTYPES] =
 147 {
 148 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
 149 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
 150 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
 151 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /*  1.2M in HD 5.25/3.5 */
 152 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /*  820K in HD 3.5in */
 153 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /*  800K in HD 3.5in */
 154 {  9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /*  720K in HD 3.5in */
 155 {  9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /*  360K in DD 5.25in */
 156 {  8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /*  640K in DD 5.25in */
 157 {  8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
 158
 159 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
 160 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
 161 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /*  820K in HD 5.25in */
 162 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /*  800K in HD 5.25in */
 163 {  9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /*  720K in HD 5.25in */
 164 {  9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /*  360K in HD 5.25in */
 165 {  8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /*  640K in HD 5.25in */
 166 };
 167
 168 #define DRVS_PER_CTLR 2         /* 2 floppies */
 169
 170 /***********************************************************************\
 171 * Per controller structure.                                             *
 172 \***********************************************************************/
 173 devclass_t fdc_devclass;
 174
 175 /***********************************************************************\
 176 * Per drive structure.                                                  *
 177 * N per controller  (DRVS_PER_CTLR)                                     *
 178 \***********************************************************************/
 179 struct fd_data {
 180         struct  fdc_data *fdc;  /* pointer to controller structure */
 181         int     fdsu;           /* this units number on this controller */
 182         int     type;           /* Drive type (FD_1440...) */
 183         struct  fd_type ft;     /* the type descriptor */
 184         int     flags;
 185 #define FD_OPEN         0x01    /* it's open            */
 186 #define FD_ACTIVE       0x02    /* it's active          */
 187 #define FD_MOTOR        0x04    /* motor should be on   */
 188 #define FD_MOTOR_WAIT   0x08    /* motor coming up      */
 189         int     skip;
 190         int     hddrv;
 191 #define FD_NO_TRACK -2
 192         int     track;          /* where we think the head is */
 193         int     options;        /* user configurable options, see ioctl_fd.h */
 194         struct  callout toffhandle;
 195         struct  callout tohandle;
 196         struct  callout motor;
 197         struct  disk disk;
 198         struct  devstat device_stats;
 199         device_t dev;
 200         fdu_t   fdu;
 201 };
 202
 203 struct fdc_ivars {
 204         int     fdunit;
 205 };
 206 static devclass_t fd_devclass;
 207
 208 /***********************************************************************\
 209 * Throughout this file the following conventions will be used:          *
 210 * fd is a pointer to the fd_data struct for the drive in question       *
 211 * fdc is a pointer to the fdc_data struct for the controller            *
 212 * fdu is the floppy drive unit number                                   *
 213 * fdcu is the floppy controller unit number                             *
 214 * fdsu is the floppy drive unit number on that controller. (sub-unit)   *
 215 \***********************************************************************/
 216
 217 /* internal functions */
 218 static  void fdc_intr(void *);
 219 static void set_motor(struct fdc_data *, int, int);
 220 #  define TURNON 1
 221 #  define TURNOFF 0
 222 static timeout_t fd_turnoff;
 223 static timeout_t fd_motor_on;
 224 static void fd_turnon(struct fd_data *);
 225 static void fdc_reset(fdc_p);
 226 static int fd_in(struct fdc_data *, int *);
 227 static int out_fdc(struct fdc_data *, int);
 228 static void fdstart(struct fdc_data *);
 229 static timeout_t fd_iotimeout;
 230 static timeout_t fd_pseudointr;
 231 static int fdstate(struct fdc_data *);
 232 static int retrier(struct fdc_data *);
 233 static int fdformat(cdev_t, struct fd_formb *, struct ucred *);
 234
 235 static int enable_fifo(fdc_p fdc);
 236
 237 static int fifo_threshold = 8;  /* XXX: should be accessible via sysctl */
 238
 239
 240 #define DEVIDLE         0
 241 #define FINDWORK        1
 242 #define DOSEEK          2
 243 #define SEEKCOMPLETE    3
 244 #define IOCOMPLETE      4
 245 #define RECALCOMPLETE   5
 246 #define STARTRECAL      6
 247 #define RESETCTLR       7
 248 #define SEEKWAIT        8
 249 #define RECALWAIT       9
 250 #define MOTORWAIT       10
 251 #define IOTIMEDOUT      11
 252 #define RESETCOMPLETE   12
 253 #define PIOREAD         13
 254
 255 #ifdef  FDC_DEBUG
 256 static char const * const fdstates[] =
 257 {
 258 "DEVIDLE",
 259 "FINDWORK",
 260 "DOSEEK",
 261 "SEEKCOMPLETE",
 262 "IOCOMPLETE",
 263 "RECALCOMPLETE",
 264 "STARTRECAL",
 265 "RESETCTLR",
 266 "SEEKWAIT",
 267 "RECALWAIT",
 268 "MOTORWAIT",
 269 "IOTIMEDOUT",
 270 "RESETCOMPLETE",
 271 "PIOREAD",
 272 };
 273
 274 /* CAUTION: fd_debug causes huge amounts of logging output */
 275 static int volatile fd_debug = 0;
 276 #define TRACE0(arg) if(fd_debug) kprintf(arg)
 277 #define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2)
 278 #else /* FDC_DEBUG */
 279 #define TRACE0(arg)
 280 #define TRACE1(arg1, arg2)
 281 #endif /* FDC_DEBUG */
 282
 283 void
 284 fdout_wr(fdc_p fdc, u_int8_t v)
 285 {
 286         bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
 287 }
 288
 289 static u_int8_t
 290 fdsts_rd(fdc_p fdc)
 291 {
 292         return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
 293 }
 294
 295 static void
 296 fddata_wr(fdc_p fdc, u_int8_t v)
 297 {
 298         bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
 299 }
 300
 301 static u_int8_t
 302 fddata_rd(fdc_p fdc)
 303 {
 304         return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
 305 }
 306
 307 static void
 308 fdctl_wr_isa(fdc_p fdc, u_int8_t v)
 309 {
 310         bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
 311 }
 312
 313 #if 0
 314
 315 static u_int8_t
 316 fdin_rd(fdc_p fdc)
 317 {
 318         return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
 319 }
 320
 321 #endif
 322
 323 static  d_open_t        Fdopen; /* NOTE, not fdopen */
 324 static  d_close_t       fdclose;
 325 static  d_ioctl_t       fdioctl;
 326 static  d_strategy_t    fdstrategy;
 327
 328 static struct dev_ops fd_ops = {
 329         { "fd", 0, D_DISK },
 330         .d_open =       Fdopen,
 331         .d_close =      fdclose,
 332         .d_read =       physread,
 333         .d_write =      physwrite,
 334         .d_ioctl =      fdioctl,
 335         .d_strategy =   fdstrategy,
 336 };
 337
 338 static int
 339 fdc_err(struct fdc_data *fdc, const char *s)
 340 {
 341         fdc->fdc_errs++;
 342         if (s) {
 343                 if (fdc->fdc_errs < FDC_ERRMAX)
 344                         device_printf(fdc->fdc_dev, "%s", s);
 345                 else if (fdc->fdc_errs == FDC_ERRMAX)
 346                         device_printf(fdc->fdc_dev, "too many errors, not "
 347                                                     "logging any more\n");
 348         }
 349
 350         return FD_FAILED;
 351 }
 352
 353 /*
 354  * fd_cmd: Send a command to the chip.  Takes a varargs with this structure:
 355  * Unit number,
 356  * # of output bytes, output bytes as ints ...,
 357  * # of input bytes, input bytes as ints ...
 358  */
 359 int
 360 fd_cmd(struct fdc_data *fdc, int n_out, ...)
 361 {
 362         u_char cmd;
 363         int n_in;
 364         int n;
 365         __va_list ap;
 366
 367         __va_start(ap, n_out);
 368         cmd = (u_char)(__va_arg(ap, int));
 369         __va_end(ap);
 370         __va_start(ap, n_out);
 371         for (n = 0; n < n_out; n++)
 372         {
 373                 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
 374                 {
 375                         char msg[50];
 376                         ksnprintf(msg, sizeof(msg),
 377                                 "cmd %x failed at out byte %d of %d\n",
 378                                 cmd, n + 1, n_out);
 379                         return fdc_err(fdc, msg);
 380                 }
 381         }
 382         n_in = __va_arg(ap, int);
 383         for (n = 0; n < n_in; n++)
 384         {
 385                 int *ptr = __va_arg(ap, int *);
 386                 if (fd_in(fdc, ptr) < 0)
 387                 {
 388                         char msg[50];
 389                         ksnprintf(msg, sizeof(msg),
 390                                 "cmd %02x failed at in byte %d of %d\n",
 391                                 cmd, n + 1, n_in);
 392                         return fdc_err(fdc, msg);
 393                 }
 394         }
 395
 396         return 0;
 397 }
 398
 399 static int
 400 enable_fifo(fdc_p fdc)
 401 {
 402         int i, j;
 403
 404         if ((fdc->flags & FDC_HAS_FIFO) == 0) {
 405
 406                 /*
 407                  * XXX:
 408                  * Cannot use fd_cmd the normal way here, since
 409                  * this might be an invalid command. Thus we send the
 410                  * first byte, and check for an early turn of data directon.
 411                  */
 412
 413                 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
 414                         return fdc_err(fdc, "Enable FIFO failed\n");
 415
 416                 /* If command is invalid, return */
 417                 j = FDSTS_TIMEOUT;
 418                 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
 419                        != NE7_RQM && j-- > 0) {
 420                         if (i == (NE7_DIO | NE7_RQM)) {
 421                                 fdc_reset(fdc);
 422                                 return FD_FAILED;
 423                         }
 424                         DELAY(1);
 425                 }
 426                 if (j<0 ||
 427                     fd_cmd(fdc, 3,
 428                            0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
 429                         fdc_reset(fdc);
 430                         return fdc_err(fdc, "Enable FIFO failed\n");
 431                 }
 432                 fdc->flags |= FDC_HAS_FIFO;
 433                 return 0;
 434         }
 435         if (fd_cmd(fdc, 4,
 436                    I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
 437                 return fdc_err(fdc, "Re-enable FIFO failed\n");
 438         return 0;
 439 }
 440
 441 static int
 442 fd_sense_drive_status(fdc_p fdc, int *st3p)
 443 {
 444         int st3;
 445
 446         if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
 447         {
 448                 return fdc_err(fdc, "Sense Drive Status failed\n");
 449         }
 450         if (st3p)
 451                 *st3p = st3;
 452
 453         return 0;
 454 }
 455
 456 static int
 457 fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
 458 {
 459         int cyl, st0, ret;
 460
 461         ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
 462         if (ret) {
 463                 (void)fdc_err(fdc,
 464                               "sense intr err reading stat reg 0\n");
 465                 return ret;
 466         }
 467
 468         if (st0p)
 469                 *st0p = st0;
 470
 471         if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
 472                 /*
 473                  * There doesn't seem to have been an interrupt.
 474                  */
 475                 return FD_NOT_VALID;
 476         }
 477
 478         if (fd_in(fdc, &cyl) < 0) {
 479                 return fdc_err(fdc, "can't get cyl num\n");
 480         }
 481
 482         if (cylp)
 483                 *cylp = cyl;
 484
 485         return 0;
 486 }
 487
 488
 489 static int
 490 fd_read_status(fdc_p fdc, int fdsu)
 491 {
 492         int i, ret;
 493
 494         for (i = 0; i < 7; i++) {
 495                 /*
 496                  * XXX types are poorly chosen.  Only bytes can by read
 497                  * from the hardware, but fdc->status[] wants u_ints and
 498                  * fd_in() gives ints.
 499                  */
 500                 int status;
 501
 502                 ret = fd_in(fdc, &status);
 503                 fdc->status[i] = status;
 504                 if (ret != 0)
 505                         break;
 506         }
 507
 508         if (ret == 0)
 509                 fdc->flags |= FDC_STAT_VALID;
 510         else
 511                 fdc->flags &= ~FDC_STAT_VALID;
 512
 513         return ret;
 514 }
 515
 516 /****************************************************************************/
 517 /*                      autoconfiguration stuff                             */
 518 /****************************************************************************/
 519
 520 int
 521 fdc_alloc_resources(struct fdc_data *fdc)
 522 {
 523         device_t dev;
 524         int ispnp, ispcmcia;
 525
 526         dev = fdc->fdc_dev;
 527         ispnp = (fdc->flags & FDC_ISPNP) != 0;
 528         ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
 529         fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
 530         fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
 531
 532         /*
 533          * On standard ISA, we don't just use an 8 port range
 534          * (e.g. 0x3f0-0x3f7) since that covers an IDE control
 535          * register at 0x3f6.
 536          *
 537          * Isn't PC hardware wonderful.
 538          *
 539          * The Y-E Data PCMCIA FDC doesn't have this problem, it
 540          * uses the register with offset 6 for pseudo-DMA, and the
 541          * one with offset 7 as control register.
 542          */
 543         fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
 544                                              &fdc->rid_ioport, 0ul, ~0ul,
 545                                              ispcmcia ? 8 : (ispnp ? 1 : 6),
 546                                              RF_ACTIVE);
 547         if (fdc->res_ioport == 0) {
 548                 device_printf(dev, "cannot reserve I/O port range\n");
 549                 return ENXIO;
 550         }
 551         fdc->portt = rman_get_bustag(fdc->res_ioport);
 552         fdc->porth = rman_get_bushandle(fdc->res_ioport);
 553
 554         if (!ispcmcia) {
 555                 /*
 556                  * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
 557                  * and some at 0x3f0-0x3f5,0x3f7. We detect the former
 558                  * by checking the size and adjust the port address
 559                  * accordingly.
 560                  */
 561                 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
 562                         fdc->port_off = -2;
 563
 564                 /*
 565                  * Register the control port range as rid 1 if it
 566                  * isn't there already. Most PnP BIOSen will have
 567                  * already done this but non-PnP configurations don't.
 568                  *
 569                  * And some (!!) report 0x3f2-0x3f5 and completely
 570                  * leave out the control register!  It seems that some
 571                  * non-antique controller chips have a different
 572                  * method of programming the transfer speed which
 573                  * doesn't require the control register, but it's
 574                  * mighty bogus as the chip still responds to the
 575                  * address for the control register.
 576                  */
 577                 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
 578                         u_long ctlstart;
 579
 580                         /* Find the control port, usually 0x3f7 */
 581                         ctlstart = rman_get_start(fdc->res_ioport) +
 582                                 fdc->port_off + 7;
 583
 584                         bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1,
 585                             -1);
 586                 }
 587
 588                 /*
 589                  * Now (finally!) allocate the control port.
 590                  */
 591                 fdc->rid_ctl = 1;
 592                 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
 593                                                   &fdc->rid_ctl,
 594                                                   0ul, ~0ul, 1, RF_ACTIVE);
 595                 if (fdc->res_ctl == 0) {
 596                         device_printf(dev,
 597                                       "cannot reserve control I/O port range\n");
 598                         return ENXIO;
 599                 }
 600                 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
 601                 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
 602         }
 603
 604         fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
 605                                           &fdc->rid_irq, 0ul, ~0ul, 1,
 606                                           RF_ACTIVE);
 607         if (fdc->res_irq == 0) {
 608                 device_printf(dev, "cannot reserve interrupt line\n");
 609                 return ENXIO;
 610         }
 611
 612         if ((fdc->flags & FDC_NODMA) == 0) {
 613                 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
 614                                                   &fdc->rid_drq, 0ul, ~0ul, 1,
 615                                                   RF_ACTIVE);
 616                 if (fdc->res_drq == 0) {
 617                         device_printf(dev, "cannot reserve DMA request line\n");
 618                         return ENXIO;
 619                 }
 620                 fdc->dmachan = fdc->res_drq->r_start;
 621         }
 622
 623         return 0;
 624 }
 625
 626 void
 627 fdc_release_resources(struct fdc_data *fdc)
 628 {
 629         device_t dev;
 630
 631         dev = fdc->fdc_dev;
 632         if (fdc->res_irq != 0) {
 633                 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
 634                                         fdc->res_irq);
 635                 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
 636                                      fdc->res_irq);
 637         }
 638         if (fdc->res_ctl != 0) {
 639                 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
 640                                         fdc->res_ctl);
 641                 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
 642                                      fdc->res_ctl);
 643         }
 644         if (fdc->res_ioport != 0) {
 645                 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
 646                                         fdc->res_ioport);
 647                 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
 648                                      fdc->res_ioport);
 649         }
 650         if (fdc->res_drq != 0) {
 651                 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
 652                                         fdc->res_drq);
 653                 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
 654                                      fdc->res_drq);
 655         }
 656 }
 657
 658 /****************************************************************************/
 659 /*                      autoconfiguration stuff                             */
 660 /****************************************************************************/
 661
 662 static struct isa_pnp_id fdc_ids[] = {
 663         {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
 664         {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
 665         {0}
 666 };
 667
 668 int
 669 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
 670 {
 671         struct fdc_ivars *ivars = device_get_ivars(child);
 672
 673         switch (which) {
 674         case FDC_IVAR_FDUNIT:
 675                 *result = ivars->fdunit;
 676                 break;
 677         default:
 678                 return ENOENT;
 679         }
 680         return 0;
 681 }
 682
 683 /*
 684  * fdc controller section.
 685  */
 686 static int
 687 fdc_probe(device_t dev)
 688 {
 689         int     error, ic_type;
 690         struct  fdc_data *fdc;
 691
 692         fdc = device_get_softc(dev);
 693         bzero(fdc, sizeof *fdc);
 694         fdc->fdc_dev = dev;
 695         fdc->fdctl_wr = fdctl_wr_isa;
 696
 697         /* Check pnp ids */
 698         error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
 699         if (error == ENXIO)
 700                 return ENXIO;
 701         if (error == 0)
 702                 fdc->flags |= FDC_ISPNP;
 703
 704         /* Attempt to allocate our resources for the duration of the probe */
 705         error = fdc_alloc_resources(fdc);
 706         if (error)
 707                 goto out;
 708
 709         /* First - lets reset the floppy controller */
 710         fdout_wr(fdc, 0);
 711         DELAY(100);
 712         fdout_wr(fdc, FDO_FRST);
 713
 714         /* see if it can handle a command */
 715         if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
 716                    NE7_SPEC_2(2, 0), 0)) {
 717                 error = ENXIO;
 718                 goto out;
 719         }
 720
 721         if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
 722                 ic_type = (u_char)ic_type;
 723                 switch (ic_type) {
 724                 case 0x80:
 725                         device_set_desc(dev, "NEC 765 or clone");
 726                         fdc->fdct = FDC_NE765;
 727                         break;
 728                 case 0x81:
 729                         device_set_desc(dev, "Intel 82077 or clone");
 730                         fdc->fdct = FDC_I82077;
 731                         break;
 732                 case 0x90:
 733                         device_set_desc(dev, "NEC 72065B or clone");
 734                         fdc->fdct = FDC_NE72065;
 735                         break;
 736                 default:
 737                         device_set_desc(dev, "generic floppy controller");
 738                         fdc->fdct = FDC_UNKNOWN;
 739                         break;
 740                 }
 741         }
 742
 743 out:
 744         fdc_release_resources(fdc);
 745         return (error);
 746 }
 747
 748 /*
 749  * Add a child device to the fdc controller.  It will then be probed etc.
 750  */
 751 static void
 752 fdc_add_child(device_t dev, const char *name, int unit)
 753 {
 754         int     disabled;
 755         struct fdc_ivars *ivar;
 756         device_t child;
 757
 758         ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
 759         if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
 760                 ivar->fdunit = 0;
 761         child = device_add_child(dev, name, unit);
 762         if (child == NULL)
 763                 return;
 764         device_set_ivars(child, ivar);
 765         if (resource_int_value(name, unit, "disabled", &disabled) == 0
 766             && disabled != 0)
 767                 device_disable(child);
 768 }
 769
 770 int
 771 fdc_attach(device_t dev)
 772 {
 773         struct  fdc_data *fdc;
 774         int     i, error;
 775
 776         fdc = device_get_softc(dev);
 777
 778         callout_init(&fdc->pseudointr_ch);
 779
 780         error = fdc_alloc_resources(fdc);
 781         if (error) {
 782                 device_printf(dev, "cannot reacquire resources\n");
 783                 return error;
 784         }
 785         error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
 786                                0, fdc_intr, fdc,
 787                                &fdc->fdc_intr, NULL, NULL);
 788         if (error) {
 789                 device_printf(dev, "cannot setup interrupt\n");
 790                 return error;
 791         }
 792         fdc->fdcu = device_get_unit(dev);
 793         fdc->flags |= FDC_ATTACHED;
 794
 795         if ((fdc->flags & FDC_NODMA) == 0) {
 796                 /* Acquire the DMA channel forever, The driver will do the rest */
 797                                 /* XXX should integrate with rman */
 798                 error = isa_dma_acquire(fdc->dmachan);
 799                 if (!error) {
 800                         error = isa_dma_init(fdc->dmachan, 128 << 3 /* XXX max secsize */,
 801                                              M_WAITOK);
 802                         if (error) {
 803                                 isa_dma_release(fdc->dmachan);
 804                                 device_printf(dev, "disabling dma\n");
 805                                 fdc->flags |= FDC_NODMA;
 806                         }
 807                 }
 808         }
 809         fdc->state = DEVIDLE;
 810
 811         /* reset controller, turn motor off, clear fdout mirror reg */
 812         fdout_wr(fdc, ((fdc->fdout = 0)));
 813         bioq_init(&fdc->bio_queue);
 814
 815         /*
 816          * Probe and attach any children.  We should probably detect
 817          * devices from the BIOS unless overridden.
 818          */
 819         for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
 820              i != -1;
 821              i = resource_query_string(i, "at", device_get_nameunit(dev)))
 822                 fdc_add_child(dev, resource_query_name(i),
 823                                resource_query_unit(i));
 824
 825         return (bus_generic_attach(dev));
 826 }
 827
 828 int
 829 fdc_print_child(device_t me, device_t child)
 830 {
 831         int retval = 0;
 832
 833         retval += bus_print_child_header(me, child);
 834         retval += kprintf(" on %s drive %d\n", device_get_nameunit(me),
 835                fdc_get_fdunit(child));
 836
 837         return (retval);
 838 }
 839
 840 static device_method_t fdc_methods[] = {
 841         /* Device interface */
 842         DEVMETHOD(device_probe,         fdc_probe),
 843         DEVMETHOD(device_attach,        fdc_attach),
 844         DEVMETHOD(device_detach,        bus_generic_detach),
 845         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
 846         DEVMETHOD(device_suspend,       bus_generic_suspend),
 847         DEVMETHOD(device_resume,        bus_generic_resume),
 848
 849         /* Bus interface */
 850         DEVMETHOD(bus_print_child,      fdc_print_child),
 851         DEVMETHOD(bus_read_ivar,        fdc_read_ivar),
 852         /* Our children never use any other bus interface methods. */
 853
 854         DEVMETHOD_END
 855 };
 856
 857 static driver_t fdc_driver = {
 858         "fdc",
 859         fdc_methods,
 860         sizeof(struct fdc_data)
 861 };
 862
 863 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, NULL, NULL);
 864 #if 0
 865 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, NULL, NULL);
 866 #endif
 867
 868 /******************************************************************/
 869 /*
 870  * devices attached to the controller section.
 871  */
 872 static int
 873 fd_probe(device_t dev)
 874 {
 875         int     i;
 876         u_int   fdt, st0, st3;
 877         struct  fd_data *fd;
 878         struct  fdc_data *fdc;
 879         fdsu_t  fdsu;
 880         static int fd_fifo = 0;
 881
 882         fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
 883         fd = device_get_softc(dev);
 884         fdc = device_get_softc(device_get_parent(dev));
 885
 886         bzero(fd, sizeof *fd);
 887         fd->dev = dev;
 888         fd->fdc = fdc;
 889         fd->fdsu = fdsu;
 890         fd->fdu = device_get_unit(dev);
 891
 892 #ifdef __x86_64__
 893         /* look up what bios thinks we have */
 894         switch (fd->fdu) {
 895         case 0:
 896                 if ((fdc->flags & FDC_ISPCMCIA))
 897                         fdt = RTCFDT_144M;
 898                 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
 899                         fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
 900                 else
 901                         fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
 902                 break;
 903         case 1:
 904                 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
 905                 break;
 906         default:
 907                 fdt = RTCFDT_NONE;
 908                 break;
 909         }
 910 #else
 911         fdt = RTCFDT_144M;      /* XXX probably */
 912 #endif
 913
 914         /* is there a unit? */
 915         if (fdt == RTCFDT_NONE)
 916                 return (ENXIO);
 917
 918         /* select it */
 919         set_motor(fdc, fdsu, TURNON);
 920         DELAY(1000000); /* 1 sec */
 921
 922         /* XXX This doesn't work before the first set_motor() */
 923         if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
 924             && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
 925             && enable_fifo(fdc) == 0) {
 926                 device_printf(device_get_parent(dev),
 927                     "FIFO enabled, %d bytes threshold\n", fifo_threshold);
 928         }
 929         fd_fifo = 1;
 930
 931         if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
 932             && (st3 & NE7_ST3_T0)) {
 933                 /* if at track 0, first seek inwards */
 934                 /* seek some steps: */
 935                 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
 936                 DELAY(300000); /* ...wait a moment... */
 937                 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
 938         }
 939
 940         /* If we're at track 0 first seek inwards. */
 941         if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
 942                 /* Seek some steps... */
 943                 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
 944                         /* ...wait a moment... */
 945                         DELAY(300000);
 946                         /* make ctrlr happy: */
 947                         fd_sense_int(fdc, 0, 0);
 948                 }
 949         }
 950
 951         for (i = 0; i < 2; i++) {
 952                 /*
 953                  * we must recalibrate twice, just in case the
 954                  * heads have been beyond cylinder 76, since most
 955                  * FDCs still barf when attempting to recalibrate
 956                  * more than 77 steps
 957                  */
 958                 /* go back to 0: */
 959                 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
 960                         /* a second being enough for full stroke seek*/
 961                         DELAY(i == 0 ? 1000000 : 300000);
 962
 963                         /* anything responding? */
 964                         if (fd_sense_int(fdc, &st0, 0) == 0 &&
 965                             (st0 & NE7_ST0_EC) == 0)
 966                                 break; /* already probed succesfully */
 967                 }
 968         }
 969
 970         set_motor(fdc, fdsu, TURNOFF);
 971
 972         if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
 973                 return (ENXIO);
 974
 975         fd->track = FD_NO_TRACK;
 976         fd->fdc = fdc;
 977         fd->fdsu = fdsu;
 978         fd->options = 0;
 979         callout_init(&fd->toffhandle);
 980         callout_init(&fd->tohandle);
 981         callout_init(&fd->motor);
 982
 983         switch (fdt) {
 984         case RTCFDT_12M:
 985                 device_set_desc(dev, "1200-KB 5.25\" drive");
 986                 fd->type = FD_1200;
 987                 break;
 988         case RTCFDT_144M | RTCFDT_144M_PRETENDED:
 989                 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
 990                 fd->type = FD_1440;
 991                 break;
 992         case RTCFDT_144M:
 993                 device_set_desc(dev, "1440-KB 3.5\" drive");
 994                 fd->type = FD_1440;
 995                 break;
 996         case RTCFDT_288M:
 997         case RTCFDT_288M_1:
 998                 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
 999                 fd->type = FD_1440;
1000                 break;
1001         case RTCFDT_360K:
1002                 device_set_desc(dev, "360-KB 5.25\" drive");
1003                 fd->type = FD_360;
1004                 break;
1005         case RTCFDT_720K:
1006                 kprintf("720-KB 3.5\" drive");
1007                 fd->type = FD_720;
1008                 break;
1009         default:
1010                 return (ENXIO);
1011         }
1012         fd->ft = fd_types[fd->type - 1];
1013         return (0);
1014 }
1015
1016 static int
1017 fd_attach(device_t dev)
1018 {
1019         struct disk_info info;
1020         struct fd_data *fd;
1021         struct fd_type *ft;
1022
1023         fd = device_get_softc(dev);
1024
1025         disk_create(fd->fdu, &fd->disk, &fd_ops);
1026         disk_setdisktype(&fd->disk, "floppy");
1027
1028         /*
1029          * Make special raw floppy devices with preset types to
1030          * make formatting easier.  These override the disk management
1031          * layer for the whole-slice-disk for partitions 128-191.  Note
1032          * that we do not override partition 255, which is the
1033          * whole-slice-part.  If we did we would have to provide our
1034          * own DIOCGPART ioctl.
1035          */
1036         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 1),
1037                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1720", fd->fdu);
1038         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 2),
1039                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1480", fd->fdu);
1040         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 3),
1041                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1440", fd->fdu);
1042         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 4),
1043                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1200", fd->fdu);
1044         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 5),
1045                  UID_ROOT, GID_WHEEL, 0600, "fd%d.820", fd->fdu);
1046         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 6),
1047                  UID_ROOT, GID_WHEEL, 0600, "fd%d.800", fd->fdu);
1048         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 7),
1049                  UID_ROOT, GID_WHEEL, 0600, "fd%d.720", fd->fdu);
1050         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 8),
1051                  UID_ROOT, GID_WHEEL, 0600, "fd%d.360", fd->fdu);
1052         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 9),
1053                  UID_ROOT, GID_WHEEL, 0600, "fd%d.640", fd->fdu);
1054         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 10),
1055                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1232", fd->fdu);
1056
1057         devstat_add_entry(&fd->device_stats, device_get_name(dev),
1058                           device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1059                           DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1060                           DEVSTAT_PRIORITY_FD);
1061
1062         if (fd->type != NO_TYPE) {
1063                 bzero(&info, sizeof(info));
1064                 ft = &fd_types[fd->type - 1];
1065                 info.d_media_blksize = 128 << ft->secsize;
1066                 info.d_media_blocks = ft->size;
1067                 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1068                 info.d_nheads = ft->heads;
1069                 info.d_secpertrack = ft->sectrac;
1070                 info.d_secpercyl = ft->sectrac * ft->heads;
1071                 info.d_ncylinders = ft->size / info.d_secpercyl;
1072                 disk_setdiskinfo(&fd->disk, &info);
1073         }
1074         return (0);
1075 }
1076
1077 static int
1078 fd_detach(device_t dev)
1079 {
1080         struct  fd_data *fd;
1081
1082         fd = device_get_softc(dev);
1083         kprintf("devfs: Please make sure that only the right fd device was removed!!!\n");
1084         dev_ops_remove_minor(&fd_ops,
1085                          /*dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),*/
1086                          dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128));
1087         disk_invalidate(&fd->disk);
1088         disk_destroy(&fd->disk);
1089         devstat_remove_entry(&fd->device_stats);
1090         callout_stop(&fd->toffhandle);
1091         callout_stop(&fd->motor);
1092
1093         return (0);
1094 }
1095
1096 static device_method_t fd_methods[] = {
1097         /* Device interface */
1098         DEVMETHOD(device_probe,         fd_probe),
1099         DEVMETHOD(device_attach,        fd_attach),
1100         DEVMETHOD(device_detach,        fd_detach),
1101         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
1102         DEVMETHOD(device_suspend,       bus_generic_suspend), /* XXX */
1103         DEVMETHOD(device_resume,        bus_generic_resume), /* XXX */
1104
1105         DEVMETHOD_END
1106 };
1107
1108 static driver_t fd_driver = {
1109         "fd",
1110         fd_methods,
1111         sizeof(struct fd_data)
1112 };
1113
1114 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, NULL, NULL);
1115
1116 /****************************************************************************/
1117 /*                            motor control stuff                           */
1118 /*              remember to not deselect the drive we're working on         */
1119 /****************************************************************************/
1120 static void
1121 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1122 {
1123         int fdout = fdc->fdout;
1124         int needspecify = 0;
1125
1126         if(turnon) {
1127                 fdout &= ~FDO_FDSEL;
1128                 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1129         } else
1130                 fdout &= ~(FDO_MOEN0 << fdsu);
1131
1132         if(!turnon
1133            && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1134                 /* gonna turn off the last drive, put FDC to bed */
1135                 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1136         else {
1137                 /* make sure controller is selected and specified */
1138                 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1139                         needspecify = 1;
1140                 fdout |= (FDO_FRST|FDO_FDMAEN);
1141         }
1142
1143         fdout_wr(fdc, fdout);
1144         fdc->fdout = fdout;
1145         TRACE1("[0x%x->FDOUT]", fdout);
1146
1147         if (needspecify) {
1148                 /*
1149                  * XXX
1150                  * special case: since we have just woken up the FDC
1151                  * from its sleep, we silently assume the command will
1152                  * be accepted, and do not test for a timeout
1153                  */
1154                 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1155                              NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1156                              0);
1157                 if (fdc->flags & FDC_HAS_FIFO)
1158                         (void) enable_fifo(fdc);
1159         }
1160 }
1161
1162 static void
1163 fd_turnoff(void *xfd)
1164 {
1165         fd_p fd = xfd;
1166
1167         TRACE1("[fd%d: turnoff]", fd->fdu);
1168
1169         crit_enter();
1170         /*
1171          * Don't turn off the motor yet if the drive is active.
1172          *
1173          * If we got here, this could only mean we missed an interrupt.
1174          * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1175          * after a controller reset.  Just schedule a pseudo-interrupt
1176          * so the state machine gets re-entered.
1177          */
1178         if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1179                 fdc_intr(fd->fdc);
1180                 crit_exit();
1181                 return;
1182         }
1183
1184         fd->flags &= ~FD_MOTOR;
1185         set_motor(fd->fdc, fd->fdsu, TURNOFF);
1186         crit_exit();
1187 }
1188
1189 static void
1190 fd_motor_on(void *xfd)
1191 {
1192         fd_p fd = xfd;
1193
1194         crit_enter();
1195         fd->flags &= ~FD_MOTOR_WAIT;
1196         if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1197         {
1198                 fdc_intr(fd->fdc);
1199         }
1200         crit_exit();
1201 }
1202
1203 static void
1204 fd_turnon(fd_p fd)
1205 {
1206         if(!(fd->flags & FD_MOTOR))
1207         {
1208                 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1209                 set_motor(fd->fdc, fd->fdsu, TURNON);
1210                 callout_reset(&fd->motor, hz, fd_motor_on, fd);
1211         }
1212 }
1213
1214 static void
1215 fdc_reset(fdc_p fdc)
1216 {
1217         /* Try a reset, keep motor on */
1218         fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1219         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1220         DELAY(100);
1221         /* enable FDC, but defer interrupts a moment */
1222         fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1223         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1224         DELAY(100);
1225         fdout_wr(fdc, fdc->fdout);
1226         TRACE1("[0x%x->FDOUT]", fdc->fdout);
1227
1228         /* XXX after a reset, silently believe the FDC will accept commands */
1229         (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1230                      NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1231                      0);
1232         if (fdc->flags & FDC_HAS_FIFO)
1233                 (void) enable_fifo(fdc);
1234 }
1235
1236 /****************************************************************************/
1237 /*                             fdc in/out                                   */
1238 /****************************************************************************/
1239 /*
1240  * FDC IO functions, take care of the main status register, timeout
1241  * in case the desired status bits are never set.
1242  *
1243  * These PIO loops initially start out with short delays between
1244  * each iteration in the expectation that the required condition
1245  * is usually met quickly, so it can be handled immediately.  After
1246  * about 1 ms, stepping is increased to achieve a better timing
1247  * accuracy in the calls to DELAY().
1248  */
1249 static int
1250 fd_in(struct fdc_data *fdc, int *ptr)
1251 {
1252         int i, j, step;
1253
1254         for (j = 0, step = 1;
1255             (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1256             j < FDSTS_TIMEOUT;
1257             j += step) {
1258                 if (i == NE7_RQM)
1259                         return (fdc_err(fdc, "ready for output in input\n"));
1260                 if (j == 1000)
1261                         step = 1000;
1262                 DELAY(step);
1263         }
1264         if (j >= FDSTS_TIMEOUT)
1265                 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1266 #ifdef  FDC_DEBUG
1267         i = fddata_rd(fdc);
1268         TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1269         *ptr = i;
1270         return (0);
1271 #else   /* !FDC_DEBUG */
1272         i = fddata_rd(fdc);
1273         if (ptr)
1274                 *ptr = i;
1275         return (0);
1276 #endif  /* FDC_DEBUG */
1277 }
1278
1279 static int
1280 out_fdc(struct fdc_data *fdc, int x)
1281 {
1282         int i, j, step;
1283
1284         for (j = 0, step = 1;
1285             (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1286             j < FDSTS_TIMEOUT;
1287             j += step) {
1288                 if (i == (NE7_DIO|NE7_RQM))
1289                         return (fdc_err(fdc, "ready for input in output\n"));
1290                 if (j == 1000)
1291                         step = 1000;
1292                 DELAY(step);
1293         }
1294         if (j >= FDSTS_TIMEOUT)
1295                 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1296
1297         /* Send the command and return */
1298         fddata_wr(fdc, x);
1299         TRACE1("[0x%x->FDDATA]", x);
1300         return (0);
1301 }
1302
1303 /****************************************************************************/
1304 /*                           fdopen/fdclose                                 */
1305 /****************************************************************************/
1306 int
1307 Fdopen(struct dev_open_args *ap)
1308 {
1309         cdev_t dev = ap->a_head.a_dev;
1310         fdu_t fdu = dkunit(dev);
1311         struct disk_info info;
1312         struct fd_type *ft;
1313         int     type;
1314         int     changetype;
1315         fd_p    fd;
1316         fdc_p   fdc;
1317
1318         /* check bounds */
1319         if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1320                 return (ENXIO);
1321         fdc = fd->fdc;
1322         if ((fdc == NULL) || (fd->type == NO_TYPE))
1323                 return (ENXIO);
1324
1325         /*
1326          * Figure out the type of floppy.  There are special whole-disk-device
1327          * overrides that will override the current type.
1328          */
1329         type = dkpart(dev);
1330         if (type == WHOLE_SLICE_PART) {
1331                 type = fd->type;        /* do not change selected type data */
1332                 changetype = 0;
1333         } else if (type > 128) {
1334                 type -= 128;            /* set to specific format */
1335                 changetype = 1;
1336         } else {
1337                 type = fd->type;        /* reset to default */
1338                 changetype = 1;
1339         }
1340         if (type > NUMDENS)
1341                 return (ENXIO);
1342         if (type != fd->type) {
1343                 /*
1344                  * For each type of basic drive, make sure we are trying
1345                  * to open a type it can do,
1346                  */
1347                 switch (fd->type) {
1348                 case FD_360:
1349                         return (ENXIO);
1350                 case FD_720:
1351                         if (   type != FD_820
1352                             && type != FD_800
1353                             && type != FD_640
1354                            )
1355                                 return (ENXIO);
1356                         break;
1357                 case FD_1200:
1358                         switch (type) {
1359                         case FD_1480:
1360                                 type = FD_1480in5_25;
1361                                 break;
1362                         case FD_1440:
1363                                 type = FD_1440in5_25;
1364                                 break;
1365                         case FD_1232:
1366                                 break;
1367                         case FD_820:
1368                                 type = FD_820in5_25;
1369                                 break;
1370                         case FD_800:
1371                                 type = FD_800in5_25;
1372                                 break;
1373                         case FD_720:
1374                                 type = FD_720in5_25;
1375                                 break;
1376                         case FD_640:
1377                                 type = FD_640in5_25;
1378                                 break;
1379                         case FD_360:
1380                                 type = FD_360in5_25;
1381                                 break;
1382                         default:
1383                                 return(ENXIO);
1384                         }
1385                         break;
1386                 case FD_1440:
1387                         if (   type != FD_1720
1388                             && type != FD_1480
1389                             && type != FD_1200
1390                             && type != FD_820
1391                             && type != FD_800
1392                             && type != FD_720
1393                             && type != FD_640
1394                             )
1395                                 return(ENXIO);
1396                         break;
1397                 }
1398         }
1399
1400         /*
1401          * fd->type is the basic drive type, not the current format
1402          * we are reading.  We only change the type when opening the
1403          * whole-slice-partition
1404          */
1405         if (changetype)
1406                 fd->ft = fd_types[type - 1];
1407         fd->flags |= FD_OPEN;
1408
1409         /*
1410          * Clearing the DMA overrun counter at open time is a bit messy.
1411          * Since we're only managing one counter per controller, opening
1412          * the second drive could mess it up.  Anyway, if the DMA overrun
1413          * condition is really persistent, it will eventually time out
1414          * still.  OTOH, clearing it here will ensure we'll at least start
1415          * trying again after a previous (maybe even long ago) failure.
1416          * Also, this is merely a stop-gap measure only that should not
1417          * happen during normal operation, so we can tolerate it to be a
1418          * bit sloppy about this.
1419          */
1420         fdc->dma_overruns = 0;
1421
1422         /*
1423          * Set disk parameters for the disk management layer.
1424          *
1425          * Note that we do not set RAWEXTENSIONS here.  We override
1426          * the minor numbers in the raw-extension range and handle them
1427          * directly.
1428          */
1429         bzero(&info, sizeof(info));
1430         ft = &fd->ft;
1431         info.d_media_blksize = 128 << ft->secsize;
1432         info.d_media_blocks = ft->size;
1433         info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1434         info.d_nheads = ft->heads;
1435         info.d_secpertrack = ft->sectrac;
1436         info.d_secpercyl = ft->sectrac * ft->heads;
1437         info.d_ncylinders = ft->size / info.d_secpercyl;
1438         disk_setdiskinfo(&fd->disk, &info);
1439
1440         return 0;
1441 }
1442
1443 int
1444 fdclose(struct dev_close_args *ap)
1445 {
1446         cdev_t dev = ap->a_head.a_dev;
1447         fdu_t fdu = dkunit(dev);
1448         struct fd_data *fd;
1449
1450         fd = devclass_get_softc(fd_devclass, fdu);
1451         fd->flags &= ~FD_OPEN;
1452         fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1453
1454         return (0);
1455 }
1456
1457 /****************************************************************************/
1458 /*                               fdstrategy                                 */
1459 /****************************************************************************/
1460 int
1461 fdstrategy(struct dev_strategy_args *ap)
1462 {
1463         cdev_t dev = ap->a_head.a_dev;
1464         struct bio *bio = ap->a_bio;
1465         struct buf *bp = bio->bio_buf;
1466         unsigned nblocks, blknum, cando;
1467         fdu_t   fdu;
1468         fdc_p   fdc;
1469         fd_p    fd;
1470         size_t  fdblk;
1471
1472         fdu = dkunit(dev);
1473         fd = devclass_get_softc(fd_devclass, fdu);
1474         if (fd == 0)
1475                 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1476                       (u_long)major(dev), (u_long)minor(dev));
1477         fdc = fd->fdc;
1478         if (fd->type == NO_TYPE) {
1479                 bp->b_error = ENXIO;
1480                 bp->b_flags |= B_ERROR;
1481                 goto bad;
1482         }
1483
1484         fdblk = 128 << (fd->ft.secsize);
1485         if (bp->b_cmd != BUF_CMD_FORMAT) {
1486                 if (bio->bio_offset < 0) {
1487                         kprintf(
1488                 "fd%d: fdstrat: bad request offset = %"PRId64", bcount = %d\n",
1489                                fdu, bio->bio_offset, bp->b_bcount);
1490                         bp->b_error = EINVAL;
1491                         bp->b_flags |= B_ERROR;
1492                         goto bad;
1493                 }
1494                 if ((bp->b_bcount % fdblk) != 0) {
1495                         bp->b_error = EINVAL;
1496                         bp->b_flags |= B_ERROR;
1497                         goto bad;
1498                 }
1499         }
1500
1501         /*
1502          * Set up block calculations.
1503          */
1504         if (bio->bio_offset > 20000000LL * fdblk) {
1505                 /*
1506                  * Reject unreasonably high block number, prevent the
1507                  * multiplication below from overflowing.
1508                  */
1509                 bp->b_error = EINVAL;
1510                 bp->b_flags |= B_ERROR;
1511                 goto bad;
1512         }
1513         blknum = (unsigned)(bio->bio_offset / fdblk);
1514         nblocks = fd->ft.size;
1515         bp->b_resid = 0;
1516         if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1517                 if (blknum <= nblocks) {
1518                         cando = (nblocks - blknum) * fdblk;
1519                         bp->b_resid = bp->b_bcount - cando;
1520                         if (cando == 0)
1521                                 goto bad;       /* not actually bad but EOF */
1522                 } else {
1523                         bp->b_error = EINVAL;
1524                         bp->b_flags |= B_ERROR;
1525                         goto bad;
1526                 }
1527         }
1528         crit_enter();
1529         bio->bio_driver_info = dev;
1530         bioqdisksort(&fdc->bio_queue, bio);
1531         callout_stop(&fd->toffhandle);
1532
1533         /* Tell devstat we are starting on the transaction */
1534         devstat_start_transaction(&fd->device_stats);
1535 #if 0
1536         device_busy(fd->dev);
1537 #endif
1538         fdstart(fdc);
1539         crit_exit();
1540         return(0);
1541
1542 bad:
1543         biodone(bio);
1544         return(0);
1545 }
1546
1547 /***************************************************************\
1548 *                               fdstart                         *
1549 * We have just queued something.. if the controller is not busy *
1550 * then simulate the case where it has just finished a command   *
1551 * So that it (the interrupt routine) looks on the queue for more*
1552 * work to do and picks up what we just added.                   *
1553 * If the controller is already busy, we need do nothing, as it  *
1554 * will pick up our work when the present work completes         *
1555 \***************************************************************/
1556 static void
1557 fdstart(struct fdc_data *fdc)
1558 {
1559         crit_enter();
1560         if(fdc->state == DEVIDLE)
1561         {
1562                 fdc_intr(fdc);
1563         }
1564         crit_exit();
1565 }
1566
1567 static void
1568 fd_iotimeout(void *xfdc)
1569 {
1570         fdc_p fdc;
1571
1572         fdc = xfdc;
1573         TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1574
1575         /*
1576          * Due to IBM's brain-dead design, the FDC has a faked ready
1577          * signal, hardwired to ready == true. Thus, any command
1578          * issued if there's no diskette in the drive will _never_
1579          * complete, and must be aborted by resetting the FDC.
1580          * Many thanks, Big Blue!
1581          * The FDC must not be reset directly, since that would
1582          * interfere with the state machine.  Instead, pretend that
1583          * the command completed but was invalid.  The state machine
1584          * will reset the FDC and retry once.
1585          */
1586         crit_enter();
1587         fdc->status[0] = NE7_ST0_IC_IV;
1588         fdc->flags &= ~FDC_STAT_VALID;
1589         fdc->state = IOTIMEDOUT;
1590         fdc_intr(fdc);
1591         crit_exit();
1592 }
1593
1594 /* just ensure it is running in a critical section */
1595 static void
1596 fd_pseudointr(void *xfdc)
1597 {
1598         crit_enter();
1599         fdc_intr(xfdc);
1600         crit_exit();
1601 }
1602
1603 /***********************************************************************\
1604 *                                 fdintr                                *
1605 * keep calling the state machine until it returns a 0                   *
1606 * ALWAYS called at SPLBIO                                               *
1607 \***********************************************************************/
1608 static void
1609 fdc_intr(void *xfdc)
1610 {
1611         fdc_p fdc = xfdc;
1612         while(fdstate(fdc))
1613                 ;
1614 }
1615
1616 /*
1617  * magic pseudo-DMA initialization for YE FDC. Sets count and
1618  * direction
1619  */
1620 #define SET_BCDR(fdc,wr,cnt,port) \
1621         bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port,  \
1622             ((cnt)-1) & 0xff);                                           \
1623         bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1624             ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1625
1626 /*
1627  * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1628  */
1629 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
1630 {
1631         u_char *cptr = (u_char *)addr;
1632
1633         if (cmd == BUF_CMD_READ) {
1634                 if (fdc->state != PIOREAD) {
1635                         fdc->state = PIOREAD;
1636                         return(0);
1637                 }
1638                 SET_BCDR(fdc, 0, count, 0);
1639                 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1640                     FDC_YE_DATAPORT, cptr, count);
1641         } else {
1642                 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1643                     FDC_YE_DATAPORT, cptr, count);
1644                 SET_BCDR(fdc, 0, count, 0);
1645         }
1646         return(1);
1647 }
1648
1649 /***********************************************************************\
1650 * The controller state machine.                                         *
1651 * if it returns a non zero value, it should be called again immediatly  *
1652 \***********************************************************************/
1653 static int
1654 fdstate(fdc_p fdc)
1655 {
1656         int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1657         unsigned blknum = 0, b_cylinder = 0;
1658         fdu_t fdu;
1659         fd_p fd;
1660         struct bio *bio;
1661         struct buf *bp;
1662         struct fd_formb *finfo = NULL;
1663         size_t fdblk;
1664         cdev_t dev;
1665
1666         bio = fdc->bio;
1667         if (bio == NULL) {
1668                 bio = bioq_first(&fdc->bio_queue);
1669                 if (bio != NULL) {
1670                         bioq_remove(&fdc->bio_queue, bio);
1671                         fdc->bio = bio;
1672                 }
1673         }
1674         if (bio == NULL) {
1675                 /***********************************************\
1676                 * nothing left for this controller to do        *
1677                 * Force into the IDLE state,                    *
1678                 \***********************************************/
1679                 fdc->state = DEVIDLE;
1680                 if (fdc->fd) {
1681                         device_printf(fdc->fdc_dev,
1682                             "unexpected valid fd pointer\n");
1683                         fdc->fd = (fd_p) 0;
1684                         fdc->fdu = -1;
1685                 }
1686                 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1687                 return (0);
1688         }
1689         bp = bio->bio_buf;
1690         dev = bio->bio_driver_info;
1691
1692         fdu = dkunit(dev);
1693         fd = devclass_get_softc(fd_devclass, fdu);
1694         fdblk = 128 << fd->ft.secsize;
1695         if (fdc->fd && (fd != fdc->fd))
1696                 device_printf(fd->dev, "confused fd pointers\n");
1697         read = (bp->b_cmd == BUF_CMD_READ);
1698         format = (bp->b_cmd == BUF_CMD_FORMAT);
1699         if (format) {
1700                 finfo = (struct fd_formb *)bp->b_data;
1701                 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1702                         - (char *)finfo;
1703         }
1704         if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1705                 blknum = (unsigned)(bio->bio_offset / fdblk) +
1706                          fd->skip  /fdblk;
1707                 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads);
1708         }
1709         TRACE1("fd%d", fdu);
1710         TRACE1("[%s]", fdstates[fdc->state]);
1711         TRACE1("(0x%x)", fd->flags);
1712         callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
1713         switch (fdc->state)
1714         {
1715         case DEVIDLE:
1716         case FINDWORK:  /* we have found new work */
1717                 fdc->retry = 0;
1718                 fd->skip = 0;
1719                 fdc->fd = fd;
1720                 fdc->fdu = fdu;
1721                 fdc->fdctl_wr(fdc, fd->ft.trans);
1722                 TRACE1("[0x%x->FDCTL]", fd->ft.trans);
1723                 /*******************************************************\
1724                 * If the next drive has a motor startup pending, then   *
1725                 * it will start up in its own good time         *
1726                 \*******************************************************/
1727                 if(fd->flags & FD_MOTOR_WAIT) {
1728                         fdc->state = MOTORWAIT;
1729                         return (0); /* come back later */
1730                 }
1731                 /*******************************************************\
1732                 * Maybe if it's not starting, it SHOULD be starting     *
1733                 \*******************************************************/
1734                 if (!(fd->flags & FD_MOTOR))
1735                 {
1736                         fdc->state = MOTORWAIT;
1737                         fd_turnon(fd);
1738                         return (0);
1739                 }
1740                 else    /* at least make sure we are selected */
1741                 {
1742                         set_motor(fdc, fd->fdsu, TURNON);
1743                 }
1744                 if (fdc->flags & FDC_NEEDS_RESET) {
1745                         fdc->state = RESETCTLR;
1746                         fdc->flags &= ~FDC_NEEDS_RESET;
1747                 } else
1748                         fdc->state = DOSEEK;
1749                 break;
1750         case DOSEEK:
1751                 if (b_cylinder == (unsigned)fd->track)
1752                 {
1753                         fdc->state = SEEKCOMPLETE;
1754                         break;
1755                 }
1756                 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1757                            fd->fdsu, b_cylinder * fd->ft.steptrac,
1758                            0))
1759                 {
1760                         /*
1761                          * seek command not accepted, looks like
1762                          * the FDC went off to the Saints...
1763                          */
1764                         fdc->retry = 6; /* try a reset */
1765                         return(retrier(fdc));
1766                 }
1767                 fd->track = FD_NO_TRACK;
1768                 fdc->state = SEEKWAIT;
1769                 return(0);      /* will return later */
1770         case SEEKWAIT:
1771                 /* allow heads to settle */
1772                 callout_reset(&fdc->pseudointr_ch, hz / 16,
1773                                fd_pseudointr, fdc);
1774                 fdc->state = SEEKCOMPLETE;
1775                 return(0);      /* will return later */
1776         case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1777                 /* Make sure seek really happened*/
1778                 if(fd->track == FD_NO_TRACK) {
1779                         int descyl = b_cylinder * fd->ft.steptrac;
1780                         do {
1781                                 /*
1782                                  * This might be a "ready changed" interrupt,
1783                                  * which cannot really happen since the
1784                                  * RDY pin is hardwired to + 5 volts.  This
1785                                  * generally indicates a "bouncing" intr
1786                                  * line, so do one of the following:
1787                                  *
1788                                  * When running on an enhanced FDC that is
1789                                  * known to not go stuck after responding
1790                                  * with INVALID, fetch all interrupt states
1791                                  * until seeing either an INVALID or a
1792                                  * real interrupt condition.
1793                                  *
1794                                  * When running on a dumb old NE765, give
1795                                  * up immediately.  The controller will
1796                                  * provide up to four dummy RC interrupt
1797                                  * conditions right after reset (for the
1798                                  * corresponding four drives), so this is
1799                                  * our only chance to get notice that it
1800                                  * was not the FDC that caused the interrupt.
1801                                  */
1802                                 if (fd_sense_int(fdc, &st0, &cyl)
1803                                     == FD_NOT_VALID)
1804                                         return 0;
1805                                 if(fdc->fdct == FDC_NE765
1806                                    && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1807                                         return 0; /* hope for a real intr */
1808                         } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1809
1810                         if (0 == descyl) {
1811                                 int failed = 0;
1812                                 /*
1813                                  * seek to cyl 0 requested; make sure we are
1814                                  * really there
1815                                  */
1816                                 if (fd_sense_drive_status(fdc, &st3))
1817                                         failed = 1;
1818                                 if ((st3 & NE7_ST3_T0) == 0) {
1819                                         kprintf(
1820                 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1821                                                fdu, st3, NE7_ST3BITS);
1822                                         failed = 1;
1823                                 }
1824
1825                                 if (failed) {
1826                                         if(fdc->retry < 3)
1827                                                 fdc->retry = 3;
1828                                         return (retrier(fdc));
1829                                 }
1830                         }
1831
1832                         if (cyl != descyl) {
1833                                 kprintf(
1834                 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1835                                        fdu, descyl, cyl, st0);
1836                                 if (fdc->retry < 3)
1837                                         fdc->retry = 3;
1838                                 return (retrier(fdc));
1839                         }
1840                 }
1841
1842                 fd->track = b_cylinder;
1843                 if (!(fdc->flags & FDC_NODMA)) {
1844                         isa_dmastart(isa_dmabp(bp),
1845                                      bp->b_data+fd->skip,
1846                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
1847                 }
1848                 sectrac = fd->ft.sectrac;
1849                 sec = blknum %  (sectrac * fd->ft.heads);
1850                 head = sec / sectrac;
1851                 sec = sec % sectrac + 1;
1852                 fd->hddrv = ((head&1)<<2)+fdu;
1853
1854                 if(format || !read)
1855                 {
1856                         /* make sure the drive is writable */
1857                         if(fd_sense_drive_status(fdc, &st3) != 0)
1858                         {
1859                                 /* stuck controller? */
1860                                 if (!(fdc->flags & FDC_NODMA))
1861                                         isa_dmadone(isa_dmabp(bp),
1862                                                     bp->b_data + fd->skip,
1863                                                     format ? bp->b_bcount : fdblk,
1864                                                     fdc->dmachan);
1865                                 fdc->retry = 6; /* reset the beast */
1866                                 return (retrier(fdc));
1867                         }
1868                         if(st3 & NE7_ST3_WP)
1869                         {
1870                                 /*
1871                                  * XXX YES! this is ugly.
1872                                  * in order to force the current operation
1873                                  * to fail, we will have to fake an FDC
1874                                  * error - all error handling is done
1875                                  * by the retrier()
1876                                  */
1877                                 fdc->status[0] = NE7_ST0_IC_AT;
1878                                 fdc->status[1] = NE7_ST1_NW;
1879                                 fdc->status[2] = 0;
1880                                 fdc->status[3] = fd->track;
1881                                 fdc->status[4] = head;
1882                                 fdc->status[5] = sec;
1883                                 fdc->retry = 8; /* break out immediately */
1884                                 fdc->state = IOTIMEDOUT; /* not really... */
1885                                 return (1);
1886                         }
1887                 }
1888
1889                 if (format) {
1890                         if (fdc->flags & FDC_NODMA) {
1891                                 /*
1892                                  * This seems to be necessary for
1893                                  * whatever obscure reason; if we omit
1894                                  * it, we end up filling the sector ID
1895                                  * fields of the newly formatted track
1896                                  * entirely with garbage, causing
1897                                  * `wrong cylinder' errors all over
1898                                  * the place when trying to read them
1899                                  * back.
1900                                  *
1901                                  * Umpf.
1902                                  */
1903                                 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1904
1905                                 (void)fdcpio(fdc,bp->b_cmd,
1906                                         bp->b_data+fd->skip,
1907                                         bp->b_bcount);
1908
1909                         }
1910                         /* formatting */
1911                         if(fd_cmd(fdc, 6,  NE7CMD_FORMAT, head << 2 | fdu,
1912                                   finfo->fd_formb_secshift,
1913                                   finfo->fd_formb_nsecs,
1914                                   finfo->fd_formb_gaplen,
1915                                   finfo->fd_formb_fillbyte, 0)) {
1916                                 /* controller fell over */
1917                                 if (!(fdc->flags & FDC_NODMA))
1918                                         isa_dmadone(isa_dmabp(bp),
1919                                                     bp->b_data + fd->skip,
1920                                                     format ? bp->b_bcount : fdblk,
1921                                                     fdc->dmachan);
1922                                 fdc->retry = 6;
1923                                 return (retrier(fdc));
1924                         }
1925                 } else {
1926                         if (fdc->flags & FDC_NODMA) {
1927                                 /*
1928                                  * this seems to be necessary even when
1929                                  * reading data
1930                                  */
1931                                 SET_BCDR(fdc, 1, fdblk, 0);
1932
1933                                 /*
1934                                  * perform the write pseudo-DMA before
1935                                  * the WRITE command is sent
1936                                  */
1937                                 if (!read)
1938                                         (void)fdcpio(fdc,bp->b_cmd,
1939                                             bp->b_data+fd->skip,
1940                                             fdblk);
1941                         }
1942                         if (fd_cmd(fdc, 9,
1943                                    (read ? NE7CMD_READ : NE7CMD_WRITE),
1944                                    head << 2 | fdu,  /* head & unit */
1945                                    fd->track,        /* track */
1946                                    head,
1947                                    sec,              /* sector + 1 */
1948                                    fd->ft.secsize,   /* sector size */
1949                                    sectrac,          /* sectors/track */
1950                                    fd->ft.gap,       /* gap size */
1951                                    fd->ft.datalen,   /* data length */
1952                                    0)) {
1953                                 /* the beast is sleeping again */
1954                                 if (!(fdc->flags & FDC_NODMA))
1955                                         isa_dmadone(isa_dmabp(bp),
1956                                                     bp->b_data + fd->skip,
1957                                                     format ? bp->b_bcount : fdblk,
1958                                                     fdc->dmachan);
1959                                 fdc->retry = 6;
1960                                 return (retrier(fdc));
1961                         }
1962                 }
1963                 if (fdc->flags & FDC_NODMA)
1964                         /*
1965                          * if this is a read, then simply await interrupt
1966                          * before performing PIO
1967                          */
1968                         if (read && !fdcpio(fdc,bp->b_cmd,
1969                             bp->b_data+fd->skip,fdblk)) {
1970                                 callout_reset(&fd->tohandle, hz,
1971                                                 fd_iotimeout, fdc);
1972                                 return(0);      /* will return later */
1973                         }
1974
1975                 /*
1976                  * write (or format) operation will fall through and
1977                  * await completion interrupt
1978                  */
1979                 fdc->state = IOCOMPLETE;
1980                 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
1981                 return (0);     /* will return later */
1982         case PIOREAD:
1983                 /*
1984                  * actually perform the PIO read.  The IOCOMPLETE case
1985                  * removes the timeout for us.
1986                  */
1987                 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
1988                 fdc->state = IOCOMPLETE;
1989                 /* FALLTHROUGH */
1990         case IOCOMPLETE: /* IO DONE, post-analyze */
1991                 callout_stop(&fd->tohandle);
1992
1993                 if (fd_read_status(fdc, fd->fdsu)) {
1994                         if (!(fdc->flags & FDC_NODMA)) {
1995                                 isa_dmadone(isa_dmabp(bp),
1996                                             bp->b_data + fd->skip,
1997                                             format ? bp->b_bcount : fdblk,
1998                                             fdc->dmachan);
1999                         }
2000                         if (fdc->retry < 6)
2001                                 fdc->retry = 6; /* force a reset */
2002                         return (retrier(fdc));
2003                 }
2004
2005                 fdc->state = IOTIMEDOUT;
2006
2007                 /* FALLTHROUGH */
2008
2009         case IOTIMEDOUT:
2010                 if (!(fdc->flags & FDC_NODMA)) {
2011                         isa_dmadone(isa_dmabp(bp),
2012                                     bp->b_data + fd->skip,
2013                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
2014                 }
2015                 if (fdc->status[0] & NE7_ST0_IC) {
2016                         if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2017                             && fdc->status[1] & NE7_ST1_OR) {
2018                                 /*
2019                                  * DMA overrun. Someone hogged the bus and
2020                                  * didn't release it in time for the next
2021                                  * FDC transfer.
2022                                  *
2023                                  * We normally restart this without bumping
2024                                  * the retry counter.  However, in case
2025                                  * something is seriously messed up (like
2026                                  * broken hardware), we rather limit the
2027                                  * number of retries so the IO operation
2028                                  * doesn't block indefinately.
2029                                  */
2030                                 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
2031                                         fdc->state = SEEKCOMPLETE;
2032                                         return (1);
2033                                 } /* else fall through */
2034                         }
2035                         if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
2036                                 && fdc->retry < 6)
2037                                 fdc->retry = 6; /* force a reset */
2038                         else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2039                                 && fdc->status[2] & NE7_ST2_WC
2040                                 && fdc->retry < 3)
2041                                 fdc->retry = 3; /* force recalibrate */
2042                         return (retrier(fdc));
2043                 }
2044                 /* All OK */
2045                 /* Operation successful, retry DMA overruns again next time. */
2046                 fdc->dma_overruns = 0;
2047                 fd->skip += fdblk;
2048                 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
2049                         /* set up next transfer */
2050                         fdc->state = DOSEEK;
2051                 } else {
2052                         /* ALL DONE */
2053                         fd->skip = 0;
2054                         fdc->bio = NULL;
2055 #if 0
2056                         device_unbusy(fd->dev);
2057 #endif
2058                         devstat_end_transaction_buf(&fd->device_stats, bp);
2059                         biodone(bio);
2060                         fdc->fd = (fd_p) 0;
2061                         fdc->fdu = -1;
2062                         fdc->state = FINDWORK;
2063                 }
2064                 return (1);
2065         case RESETCTLR:
2066                 fdc_reset(fdc);
2067                 fdc->retry++;
2068                 fdc->state = RESETCOMPLETE;
2069                 return (0);
2070         case RESETCOMPLETE:
2071                 /*
2072                  * Discard all the results from the reset so that they
2073                  * can't cause an unexpected interrupt later.
2074                  */
2075                 for (i = 0; i < 4; i++)
2076                         (void)fd_sense_int(fdc, &st0, &cyl);
2077                 fdc->state = STARTRECAL;
2078                 /* Fall through. */
2079         case STARTRECAL:
2080                 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
2081                         /* arrgl */
2082                         fdc->retry = 6;
2083                         return (retrier(fdc));
2084                 }
2085                 fdc->state = RECALWAIT;
2086                 return (0);     /* will return later */
2087         case RECALWAIT:
2088                 /* allow heads to settle */
2089                 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
2090                 fdc->state = RECALCOMPLETE;
2091                 return (0);     /* will return later */
2092         case RECALCOMPLETE:
2093                 do {
2094                         /*
2095                          * See SEEKCOMPLETE for a comment on this:
2096                          */
2097                         if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2098                                 return 0;
2099                         if(fdc->fdct == FDC_NE765
2100                            && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2101                                 return 0; /* hope for a real intr */
2102                 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2103                 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2104                 {
2105                         if(fdc->retry > 3)
2106                                 /*
2107                                  * a recalibrate from beyond cylinder 77
2108                                  * will "fail" due to the FDC limitations;
2109                                  * since people used to complain much about
2110                                  * the failure message, try not logging
2111                                  * this one if it seems to be the first
2112                                  * time in a line
2113                                  */
2114                                 kprintf("fd%d: recal failed ST0 %b cyl %d\n",
2115                                        fdu, st0, NE7_ST0BITS, cyl);
2116                         if(fdc->retry < 3) fdc->retry = 3;
2117                         return (retrier(fdc));
2118                 }
2119                 fd->track = 0;
2120                 /* Seek (probably) necessary */
2121                 fdc->state = DOSEEK;
2122                 return (1);     /* will return immediatly */
2123         case MOTORWAIT:
2124                 if(fd->flags & FD_MOTOR_WAIT)
2125                 {
2126                         return (0); /* time's not up yet */
2127                 }
2128                 if (fdc->flags & FDC_NEEDS_RESET) {
2129                         fdc->state = RESETCTLR;
2130                         fdc->flags &= ~FDC_NEEDS_RESET;
2131                 } else {
2132                         /*
2133                          * If all motors were off, then the controller was
2134                          * reset, so it has lost track of the current
2135                          * cylinder.  Recalibrate to handle this case.
2136                          * But first, discard the results of the reset.
2137                          */
2138                         fdc->state = RESETCOMPLETE;
2139                 }
2140                 return (1);     /* will return immediatly */
2141         default:
2142                 device_printf(fdc->fdc_dev, "unexpected FD int->");
2143                 if (fd_read_status(fdc, fd->fdsu) == 0)
2144                         kprintf("FDC status :%x %x %x %x %x %x %x   ",
2145                                fdc->status[0],
2146                                fdc->status[1],
2147                                fdc->status[2],
2148                                fdc->status[3],
2149                                fdc->status[4],
2150                                fdc->status[5],
2151                                fdc->status[6] );
2152                 else
2153                         kprintf("No status available   ");
2154                 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2155                 {
2156                         kprintf("[controller is dead now]\n");
2157                         return (0);
2158                 }
2159                 kprintf("ST0 = %x, PCN = %x\n", st0, cyl);
2160                 return (0);
2161         }
2162         /*XXX confusing: some branches return immediately, others end up here*/
2163         return (1); /* Come back immediatly to new state */
2164 }
2165
2166 static int
2167 retrier(struct fdc_data *fdc)
2168 {
2169         struct bio *bio;
2170         struct buf *bp;
2171         struct fd_data *fd;
2172         cdev_t dev;
2173         int fdu;
2174
2175         bio = fdc->bio;
2176         bp = bio->bio_buf;
2177         dev = bio->bio_driver_info;
2178
2179         /* XXX shouldn't this be cached somewhere?  */
2180         fdu = dkunit(dev);
2181         fd = devclass_get_softc(fd_devclass, fdu);
2182         if (fd->options & FDOPT_NORETRY)
2183                 goto fail;
2184
2185         switch (fdc->retry) {
2186         case 0: case 1: case 2:
2187                 fdc->state = SEEKCOMPLETE;
2188                 break;
2189         case 3: case 4: case 5:
2190                 fdc->state = STARTRECAL;
2191                 break;
2192         case 6:
2193                 fdc->state = RESETCTLR;
2194                 break;
2195         case 7:
2196                 break;
2197         default:
2198         fail:
2199                 {
2200                         int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2201
2202                         if (printerror) {
2203                                 /*
2204                                  * note: use the correct device for more
2205                                  * verbose error reporting.
2206                                  */
2207                                 diskerr(bio, dev,
2208                                         "hard error", LOG_PRINTF,
2209                                         fdc->fd->skip);
2210                         }
2211                         if (printerror) {
2212                                 if (fdc->flags & FDC_STAT_VALID)
2213                                         kprintf(
2214                         " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2215                                                fdc->status[0], NE7_ST0BITS,
2216                                                fdc->status[1], NE7_ST1BITS,
2217                                                fdc->status[2], NE7_ST2BITS,
2218                                                fdc->status[3], fdc->status[4],
2219                                                fdc->status[5]);
2220                                 else
2221                                         kprintf(" (No status)\n");
2222                         }
2223                 }
2224                 bp->b_flags |= B_ERROR;
2225                 bp->b_error = EIO;
2226                 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2227                 fdc->bio = NULL;
2228                 fdc->fd->skip = 0;
2229 #if 0
2230                 device_unbusy(fd->dev);
2231 #endif
2232                 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2233                 biodone(bio);
2234                 fdc->state = FINDWORK;
2235                 fdc->flags |= FDC_NEEDS_RESET;
2236                 fdc->fd = (fd_p) 0;
2237                 fdc->fdu = -1;
2238                 return (1);
2239         }
2240         fdc->retry++;
2241         return (1);
2242 }
2243
2244 static int
2245 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred)
2246 {
2247         fdu_t   fdu;
2248         fd_p    fd;
2249         struct buf *bp;
2250         int rv = 0;
2251         size_t fdblk;
2252
2253         fdu     = dkunit(dev);
2254         fd      = devclass_get_softc(fd_devclass, fdu);
2255         fdblk = 128 << fd->ft.secsize;
2256
2257         /* set up a buffer header for fdstrategy() */
2258         bp = getpbuf(NULL);
2259         bp->b_cmd = BUF_CMD_FORMAT;
2260
2261         /*
2262          * calculate a fake blkno, so fdstrategy() would initiate a
2263          * seek to the requested cylinder
2264          */
2265         bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
2266                 (fd->ft.sectrac * fd->ft.heads)
2267                 + finfo->head * fd->ft.sectrac) * fdblk;
2268         bp->b_bio1.bio_driver_info = dev;
2269         bp->b_bio1.bio_flags |= BIO_SYNC;
2270         bp->b_bio1.bio_done = biodone_sync;
2271
2272         bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2273         bp->b_data = (caddr_t)finfo;
2274
2275         /* now do the format */
2276         dev_dstrategy(dev, &bp->b_bio1);
2277
2278         /* ...and wait for it to complete */
2279         rv = biowait_timeout(&bp->b_bio1, "fdform", 20 * hz);
2280         if (rv == EWOULDBLOCK) {
2281                 /* timed out */
2282                 rv = EIO;
2283 #if 0
2284                 device_unbusy(fd->dev);
2285 #endif
2286                 biodone(&bp->b_bio1);
2287         }
2288         if (bp->b_flags & B_ERROR)
2289                 rv = bp->b_error;
2290         /*
2291          * allow the process to be swapped
2292          */
2293         relpbuf(bp, NULL);
2294         return rv;
2295 }
2296
2297 /*
2298  * TODO: don't allocate buffer on stack.
2299  */
2300
2301 static int
2302 fdioctl(struct dev_ioctl_args *ap)
2303 {
2304         cdev_t dev = ap->a_head.a_dev;
2305         fdu_t   fdu = dkunit(dev);
2306         fd_p    fd = devclass_get_softc(fd_devclass, fdu);
2307         struct fdc_status *fsp;
2308         int error = 0;
2309
2310         switch (ap->a_cmd) {
2311         case FD_FORM:
2312                 if ((ap->a_fflag & FWRITE) == 0)
2313                         error = EBADF;  /* must be opened for writing */
2314                 else if (((struct fd_formb *)ap->a_data)->format_version !=
2315                         FD_FORMAT_VERSION)
2316                         error = EINVAL; /* wrong version of formatting prog */
2317                 else
2318                         error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred);
2319                 break;
2320
2321         case FD_GTYPE:                  /* get drive type */
2322                 *(struct fd_type *)ap->a_data = fd->ft;
2323                 break;
2324
2325         case FD_STYPE:                  /* set drive type */
2326                 /* this is considered harmful; only allow for superuser */
2327                 if (priv_check_cred(ap->a_cred, PRIV_ROOT, 0) != 0)
2328                         return EPERM;
2329                 fd->ft = *(struct fd_type *)ap->a_data;
2330                 break;
2331
2332         case FD_GOPTS:                  /* get drive options */
2333                 *(int *)ap->a_data = fd->options;
2334                 break;
2335
2336         case FD_SOPTS:                  /* set drive options */
2337                 fd->options = *(int *)ap->a_data;
2338                 break;
2339
2340         case FD_GSTAT:
2341                 fsp = (struct fdc_status *)ap->a_data;
2342                 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2343                         return EINVAL;
2344                 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2345                 break;
2346
2347         default:
2348                 error = ENOTTY;
2349                 break;
2350         }
2351         return (error);
2352 }