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