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  *      $Id: fd.c,v 1.132 1999/01/19 00:21:36 peter Exp $
  51  *
  52  */
  53
  54 #include "fd.h"
  55 #include "opt_devfs.h"
  56 #include "opt_fdc.h"
  57
  58 #if NFDC > 0
  59
  60 #include <sys/param.h>
  61 #include <sys/systm.h>
  62 #include <sys/kernel.h>
  63 #include <sys/conf.h>
  64 #include <sys/fcntl.h>
  65 #include <machine/clock.h>
  66 #include <machine/ioctl_fd.h>
  67 #include <sys/disklabel.h>
  68 #include <sys/buf.h>
  69 #include <sys/devicestat.h>
  70 #include <sys/malloc.h>
  71 #include <sys/proc.h>
  72 #include <sys/syslog.h>
  73 #include <i386/isa/isa.h>
  74 #include <i386/isa/isa_device.h>
  75 #include <i386/isa/fdreg.h>
  76 #include <i386/isa/fdc.h>
  77 #include <i386/isa/rtc.h>
  78 #include <machine/stdarg.h>
  79 #ifdef  DEVFS
  80 #include <sys/devfsext.h>
  81 #endif  /* DEVFS */
  82
  83 /* misuse a flag to identify format operation */
  84 #define B_FORMAT B_XXX
  85
  86 /* configuration flags */
  87 #define FDC_PRETEND_D0  (1 << 0)        /* pretend drive 0 to be there */
  88 #ifdef FDC_YE
  89 #define FDC_IS_PCMCIA  (1 << 1)         /* if successful probe, then it's
  90                                            a PCMCIA device */
  91 #endif
  92
  93 /* internally used only, not really from CMOS: */
  94 #define RTCFDT_144M_PRETENDED   0x1000
  95
  96 /*
  97  * this biotab field doubles as a field for the physical unit number
  98  * on the controller
  99  */
 100 #define id_physid id_scsiid
 101
 102 /* error returns for fd_cmd() */
 103 #define FD_FAILED -1
 104 #define FD_NOT_VALID -2
 105 #define FDC_ERRMAX      100     /* do not log more */
 106
 107 #define NUMTYPES 14
 108 #define NUMDENS  (NUMTYPES - 6)
 109
 110 /* These defines (-1) must match index for fd_types */
 111 #define F_TAPE_TYPE     0x020   /* bit for fd_types to indicate tape */
 112 #define NO_TYPE         0       /* must match NO_TYPE in ft.c */
 113 #define FD_1720         1
 114 #define FD_1480         2
 115 #define FD_1440         3
 116 #define FD_1200         4
 117 #define FD_820          5
 118 #define FD_800          6
 119 #define FD_720          7
 120 #define FD_360          8
 121
 122 #define FD_1480in5_25   9
 123 #define FD_1440in5_25   10
 124 #define FD_820in5_25    11
 125 #define FD_800in5_25    12
 126 #define FD_720in5_25    13
 127 #define FD_360in5_25    14
 128
 129
 130 static struct fd_type fd_types[NUMTYPES] =
 131 {
 132 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
 133 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
 134 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
 135 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /*  1.2M in HD 5.25/3.5 */
 136 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /*  820K in HD 3.5in */
 137 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /*  800K in HD 3.5in */
 138 {  9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /*  720K in HD 3.5in */
 139 {  9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /*  360K in DD 5.25in */
 140
 141 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
 142 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
 143 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /*  820K in HD 5.25in */
 144 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /*  800K in HD 5.25in */
 145 {  9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /*  720K in HD 5.25in */
 146 {  9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /*  360K in HD 5.25in */
 147 };
 148
 149 #define DRVS_PER_CTLR 2         /* 2 floppies */
 150
 151 /***********************************************************************\
 152 * Per controller structure.                                             *
 153 \***********************************************************************/
 154 struct fdc_data fdc_data[NFDC];
 155
 156 /***********************************************************************\
 157 * Per drive structure.                                                  *
 158 * N per controller  (DRVS_PER_CTLR)                                     *
 159 \***********************************************************************/
 160 static struct fd_data {
 161         struct  fdc_data *fdc;  /* pointer to controller structure */
 162         int     fdsu;           /* this units number on this controller */
 163         int     type;           /* Drive type (FD_1440...) */
 164         struct  fd_type *ft;    /* pointer to the type descriptor */
 165         int     flags;
 166 #define FD_OPEN         0x01    /* it's open            */
 167 #define FD_ACTIVE       0x02    /* it's active          */
 168 #define FD_MOTOR        0x04    /* motor should be on   */
 169 #define FD_MOTOR_WAIT   0x08    /* motor coming up      */
 170         int     skip;
 171         int     hddrv;
 172 #define FD_NO_TRACK -2
 173         int     track;          /* where we think the head is */
 174         int     options;        /* user configurable options, see ioctl_fd.h */
 175         struct  callout_handle toffhandle;
 176         struct  callout_handle tohandle;
 177         struct  devstat device_stats;
 178 #ifdef DEVFS
 179         void    *bdevs[1 + NUMDENS + MAXPARTITIONS];
 180         void    *cdevs[1 + NUMDENS + MAXPARTITIONS];
 181 #endif
 182 } fd_data[NFD];
 183
 184 /***********************************************************************\
 185 * Throughout this file the following conventions will be used:          *
 186 * fd is a pointer to the fd_data struct for the drive in question       *
 187 * fdc is a pointer to the fdc_data struct for the controller            *
 188 * fdu is the floppy drive unit number                                   *
 189 * fdcu is the floppy controller unit number                             *
 190 * fdsu is the floppy drive unit number on that controller. (sub-unit)   *
 191 \***********************************************************************/
 192
 193 #ifdef FDC_YE
 194 #include "card.h"
 195 static int yeattach(struct isa_device *);
 196 #endif
 197
 198 /* autoconfig functions */
 199 static int fdprobe(struct isa_device *);
 200 static int fdattach(struct isa_device *);
 201
 202 /* needed for ft driver, thus exported */
 203 int in_fdc(fdcu_t);
 204 int out_fdc(fdcu_t, int);
 205
 206 /* internal functions */
 207 static void set_motor(fdcu_t, int, int);
 208 #  define TURNON 1
 209 #  define TURNOFF 0
 210 static timeout_t fd_turnoff;
 211 static timeout_t fd_motor_on;
 212 static void fd_turnon(fdu_t);
 213 static void fdc_reset(fdc_p);
 214 static int fd_in(fdcu_t, int *);
 215 static void fdstart(fdcu_t);
 216 static timeout_t fd_iotimeout;
 217 static timeout_t fd_pseudointr;
 218 static ointhand2_t fdintr;
 219 static int fdstate(fdcu_t, fdc_p);
 220 static int retrier(fdcu_t);
 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
 360 /* autoconfig structure */
 361
 362 struct  isa_driver fdcdriver = {
 363         fdprobe, fdattach, "fdc",
 364 };
 365
 366 static  d_open_t        Fdopen; /* NOTE, not fdopen */
 367 static  d_read_t        fdread;
 368 static  d_write_t       fdwrite;
 369 static  d_close_t       fdclose;
 370 static  d_ioctl_t       fdioctl;
 371 static  d_strategy_t    fdstrategy;
 372
 373 /* even if SLICE defined, these are needed for the ft support. */
 374 #define CDEV_MAJOR 9
 375 #define BDEV_MAJOR 2
 376
 377
 378 static struct cdevsw fd_cdevsw = {
 379           Fdopen,       fdclose,        fdread, fdwrite,
 380           fdioctl,      nostop,         nullreset,      nodevtotty,
 381           seltrue,      nommap,         fdstrategy,     "fd",
 382           NULL,         -1,             nodump,         nopsize,
 383           D_DISK,       0,              -1 };
 384
 385
 386 static struct isa_device *fdcdevs[NFDC];
 387
 388
 389 static int
 390 fdc_err(fdcu_t fdcu, const char *s)
 391 {
 392         fdc_data[fdcu].fdc_errs++;
 393         if(s) {
 394                 if(fdc_data[fdcu].fdc_errs < FDC_ERRMAX)
 395                         printf("fdc%d: %s", fdcu, s);
 396                 else if(fdc_data[fdcu].fdc_errs == FDC_ERRMAX)
 397                         printf("fdc%d: too many errors, not logging any more\n",
 398                             fdcu);
 399         }
 400
 401         return FD_FAILED;
 402 }
 403
 404 /*
 405  * fd_cmd: Send a command to the chip.  Takes a varargs with this structure:
 406  * Unit number,
 407  * # of output bytes, output bytes as ints ...,
 408  * # of input bytes, input bytes as ints ...
 409  */
 410
 411 static int
 412 fd_cmd(fdcu_t fdcu, int n_out, ...)
 413 {
 414         u_char cmd;
 415         int n_in;
 416         int n;
 417         va_list ap;
 418
 419         va_start(ap, n_out);
 420         cmd = (u_char)(va_arg(ap, int));
 421         va_end(ap);
 422         va_start(ap, n_out);
 423         for (n = 0; n < n_out; n++)
 424         {
 425                 if (out_fdc(fdcu, va_arg(ap, int)) < 0)
 426                 {
 427                         char msg[50];
 428                         snprintf(msg, sizeof(msg),
 429                                 "cmd %x failed at out byte %d of %d\n",
 430                                 cmd, n + 1, n_out);
 431                         return fdc_err(fdcu, msg);
 432                 }
 433         }
 434         n_in = va_arg(ap, int);
 435         for (n = 0; n < n_in; n++)
 436         {
 437                 int *ptr = va_arg(ap, int *);
 438                 if (fd_in(fdcu, ptr) < 0)
 439                 {
 440                         char msg[50];
 441                         snprintf(msg, sizeof(msg),
 442                                 "cmd %02x failed at in byte %d of %d\n",
 443                                 cmd, n + 1, n_in);
 444                         return fdc_err(fdcu, msg);
 445                 }
 446         }
 447
 448         return 0;
 449 }
 450
 451 static int
 452 enable_fifo(fdc_p fdc)
 453 {
 454         int i, j;
 455
 456         if ((fdc->flags & FDC_HAS_FIFO) == 0) {
 457
 458                 /*
 459                  * XXX:
 460                  * Cannot use fd_cmd the normal way here, since
 461                  * this might be an invalid command. Thus we send the
 462                  * first byte, and check for an early turn of data directon.
 463                  */
 464
 465                 if (out_fdc(fdc->fdcu, I8207X_CONFIGURE) < 0)
 466                         return fdc_err(fdc->fdcu, "Enable FIFO failed\n");
 467
 468                 /* If command is invalid, return */
 469                 j = 100000;
 470                 while ((i = inb(fdc->baseport + FDSTS) & (NE7_DIO | NE7_RQM))
 471                        != NE7_RQM && j-- > 0)
 472                         if (i == (NE7_DIO | NE7_RQM)) {
 473                                 fdc_reset(fdc);
 474                                 return FD_FAILED;
 475                         }
 476                 if (j<0 ||
 477                     fd_cmd(fdc->fdcu, 3,
 478                            0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
 479                         fdc_reset(fdc);
 480                         return fdc_err(fdc->fdcu, "Enable FIFO failed\n");
 481                 }
 482                 fdc->flags |= FDC_HAS_FIFO;
 483                 return 0;
 484         }
 485         if (fd_cmd(fdc->fdcu, 4,
 486                    I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
 487                 return fdc_err(fdc->fdcu, "Re-enable FIFO failed\n");
 488         return 0;
 489 }
 490
 491 static int
 492 fd_sense_drive_status(fdc_p fdc, int *st3p)
 493 {
 494         int st3;
 495
 496         if (fd_cmd(fdc->fdcu, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
 497         {
 498                 return fdc_err(fdc->fdcu, "Sense Drive Status failed\n");
 499         }
 500         if (st3p)
 501                 *st3p = st3;
 502
 503         return 0;
 504 }
 505
 506 static int
 507 fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
 508 {
 509         int st0, cyl;
 510
 511         int ret = fd_cmd(fdc->fdcu, 1, NE7CMD_SENSEI, 1, &st0);
 512
 513         if (ret)
 514         {
 515                 (void)fdc_err(fdc->fdcu,
 516                               "sense intr err reading stat reg 0\n");
 517                 return ret;
 518         }
 519
 520         if (st0p)
 521                 *st0p = st0;
 522
 523         if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV)
 524         {
 525                 /*
 526                  * There doesn't seem to have been an interrupt.
 527                  */
 528                 return FD_NOT_VALID;
 529         }
 530
 531         if (fd_in(fdc->fdcu, &cyl) < 0)
 532         {
 533                 return fdc_err(fdc->fdcu, "can't get cyl num\n");
 534         }
 535
 536         if (cylp)
 537                 *cylp = cyl;
 538
 539         return 0;
 540 }
 541
 542
 543 static int
 544 fd_read_status(fdc_p fdc, int fdsu)
 545 {
 546         int i, ret;
 547
 548         for (i = 0; i < 7; i++)
 549         {
 550                 /*
 551                  * XXX types are poorly chosen.  Only bytes can by read
 552                  * from the hardware, but fdc->status[] wants u_ints and
 553                  * fd_in() gives ints.
 554                  */
 555                 int status;
 556
 557                 ret = fd_in(fdc->fdcu, &status);
 558                 fdc->status[i] = status;
 559                 if (ret != 0)
 560                         break;
 561         }
 562
 563         if (ret == 0)
 564                 fdc->flags |= FDC_STAT_VALID;
 565         else
 566                 fdc->flags &= ~FDC_STAT_VALID;
 567
 568         return ret;
 569 }
 570
 571 /****************************************************************************/
 572 /*                      autoconfiguration stuff                             */
 573 /****************************************************************************/
 574
 575 /*
 576  * probe for existance of controller
 577  */
 578 static int
 579 fdprobe(struct isa_device *dev)
 580 {
 581         fdcu_t  fdcu = dev->id_unit;
 582         if(fdc_data[fdcu].flags & FDC_ATTACHED)
 583         {
 584                 printf("fdc%d: unit used multiple times\n", fdcu);
 585                 return 0;
 586         }
 587
 588         fdcdevs[fdcu] = dev;
 589         fdc_data[fdcu].baseport = dev->id_iobase;
 590
 591         /* First - lets reset the floppy controller */
 592         outb(dev->id_iobase+FDOUT, 0);
 593         DELAY(100);
 594         outb(dev->id_iobase+FDOUT, FDO_FRST);
 595
 596         /* see if it can handle a command */
 597         if (fd_cmd(fdcu,
 598                    3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
 599                    0))
 600         {
 601                 return(0);
 602         }
 603 #ifdef FDC_YE
 604         /*
 605          * don't succeed on probe; wait
 606          * for PCCARD subsystem to do it
 607          */
 608         if (dev->id_flags & FDC_IS_PCMCIA)
 609                 return(0);
 610 #endif
 611         return (IO_FDCSIZE);
 612 }
 613
 614 /*
 615  * wire controller into system, look for floppy units
 616  */
 617 static int
 618 fdattach(struct isa_device *dev)
 619 {
 620         unsigned fdt;
 621         fdu_t   fdu;
 622         fdcu_t  fdcu = dev->id_unit;
 623         fdc_p   fdc = fdc_data + fdcu;
 624         fd_p    fd;
 625         int     fdsu, st0, st3, i;
 626         struct isa_device *fdup;
 627         int ic_type = 0;
 628 #ifdef DEVFS
 629         int     mynor;
 630         int     typemynor;
 631         int     typesize;
 632 #endif
 633
 634         dev->id_ointr = fdintr;
 635         fdc->fdcu = fdcu;
 636         fdc->flags |= FDC_ATTACHED;
 637         fdc->dmachan = dev->id_drq;
 638         /* Acquire the DMA channel forever, The driver will do the rest */
 639         isa_dma_acquire(fdc->dmachan);
 640         isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
 641         fdc->state = DEVIDLE;
 642         /* reset controller, turn motor off, clear fdout mirror reg */
 643         outb(fdc->baseport + FDOUT, ((fdc->fdout = 0)));
 644         bufq_init(&fdc->head);
 645
 646         /* check for each floppy drive */
 647         for (fdup = isa_biotab_fdc; fdup->id_driver != 0; fdup++) {
 648                 if (fdup->id_iobase != dev->id_iobase)
 649                         continue;
 650                 fdu = fdup->id_unit;
 651                 fd = &fd_data[fdu];
 652                 if (fdu >= (NFD))
 653                         continue;
 654                 fdsu = fdup->id_physid;
 655                 /* look up what bios thinks we have */
 656                 switch (fdu) {
 657                         case 0: if (dev->id_flags & FDC_PRETEND_D0)
 658                                         fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
 659                                 else
 660                                         fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
 661                                 break;
 662                         case 1: fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
 663                                 break;
 664                         default: fdt = RTCFDT_NONE;
 665                                 break;
 666                 }
 667                 /* is there a unit? */
 668                 if ((fdt == RTCFDT_NONE)
 669                 ) {
 670                         fd->type = NO_TYPE;
 671                         continue;
 672                 }
 673
 674                 /* select it */
 675                 set_motor(fdcu, fdsu, TURNON);
 676                 DELAY(1000000); /* 1 sec */
 677
 678                 if (ic_type == 0 &&
 679                     fd_cmd(fdcu, 1, NE7CMD_VERSION, 1, &ic_type) == 0)
 680                 {
 681 #ifdef FDC_PRINT_BOGUS_CHIPTYPE
 682                         printf("fdc%d: ", fdcu);
 683 #endif
 684                         ic_type = (u_char)ic_type;
 685                         switch( ic_type ) {
 686                         case 0x80:
 687 #ifdef FDC_PRINT_BOGUS_CHIPTYPE
 688                                 printf("NEC 765\n");
 689 #endif
 690                                 fdc->fdct = FDC_NE765;
 691                                 break;
 692                         case 0x81:
 693 #ifdef FDC_PRINT_BOGUS_CHIPTYPE
 694                                 printf("Intel 82077\n");
 695 #endif
 696                                 fdc->fdct = FDC_I82077;
 697                                 break;
 698                         case 0x90:
 699 #ifdef FDC_PRINT_BOGUS_CHIPTYPE
 700                                 printf("NEC 72065B\n");
 701 #endif
 702                                 fdc->fdct = FDC_NE72065;
 703                                 break;
 704                         default:
 705 #ifdef FDC_PRINT_BOGUS_CHIPTYPE
 706                                 printf("unknown IC type %02x\n", ic_type);
 707 #endif
 708                                 fdc->fdct = FDC_UNKNOWN;
 709                                 break;
 710                         }
 711                         if (fdc->fdct != FDC_NE765 &&
 712                             fdc->fdct != FDC_UNKNOWN &&
 713                             enable_fifo(fdc) == 0) {
 714                                 printf("fdc%d: FIFO enabled", fdcu);
 715                                 printf(", %d bytes threshold\n",
 716                                     fifo_threshold);
 717                         }
 718                 }
 719                 if ((fd_cmd(fdcu, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) &&
 720                     (st3 & NE7_ST3_T0)) {
 721                         /* if at track 0, first seek inwards */
 722                         /* seek some steps: */
 723                         (void)fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0);
 724                         DELAY(300000); /* ...wait a moment... */
 725                         (void)fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
 726                 }
 727
 728                 /* If we're at track 0 first seek inwards. */
 729                 if ((fd_sense_drive_status(fdc, &st3) == 0) &&
 730                     (st3 & NE7_ST3_T0)) {
 731                         /* Seek some steps... */
 732                         if (fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
 733                                 /* ...wait a moment... */
 734                                 DELAY(300000);
 735                                 /* make ctrlr happy: */
 736                                 (void)fd_sense_int(fdc, 0, 0);
 737                         }
 738                 }
 739
 740                 for(i = 0; i < 2; i++) {
 741                         /*
 742                          * we must recalibrate twice, just in case the
 743                          * heads have been beyond cylinder 76, since most
 744                          * FDCs still barf when attempting to recalibrate
 745                          * more than 77 steps
 746                          */
 747                         /* go back to 0: */
 748                         if (fd_cmd(fdcu, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
 749                                 /* a second being enough for full stroke seek*/
 750                                 DELAY(i == 0? 1000000: 300000);
 751
 752                                 /* anything responding? */
 753                                 if (fd_sense_int(fdc, &st0, 0) == 0 &&
 754                                 (st0 & NE7_ST0_EC) == 0)
 755                                         break; /* already probed succesfully */
 756                         }
 757                 }
 758
 759                 set_motor(fdcu, fdsu, TURNOFF);
 760
 761                 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
 762                         continue;
 763
 764                 fd->track = FD_NO_TRACK;
 765                 fd->fdc = fdc;
 766                 fd->fdsu = fdsu;
 767                 fd->options = 0;
 768                 callout_handle_init(&fd->toffhandle);
 769                 callout_handle_init(&fd->tohandle);
 770                 printf("fd%d: ", fdu);
 771
 772                 switch (fdt) {
 773                 case RTCFDT_12M:
 774                         printf("1.2MB 5.25in\n");
 775                         fd->type = FD_1200;
 776                         break;
 777                 case RTCFDT_144M | RTCFDT_144M_PRETENDED:
 778                         printf("config-pretended ");
 779                         fdt = RTCFDT_144M;
 780                         /* fallthrough */
 781                 case RTCFDT_144M:
 782                         printf("1.44MB 3.5in\n");
 783                         fd->type = FD_1440;
 784                         break;
 785                 case RTCFDT_288M:
 786                 case RTCFDT_288M_1:
 787                         printf("2.88MB 3.5in - 1.44MB mode\n");
 788                         fd->type = FD_1440;
 789                         break;
 790                 case RTCFDT_360K:
 791                         printf("360KB 5.25in\n");
 792                         fd->type = FD_360;
 793                         break;
 794                 case RTCFDT_720K:
 795                         printf("720KB 3.5in\n");
 796                         fd->type = FD_720;
 797                         break;
 798                 default:
 799                         printf("unknown\n");
 800                         fd->type = NO_TYPE;
 801                         continue;
 802                 }
 803 #ifdef DEVFS
 804                 mynor = fdu << 6;
 805                 fd->bdevs[0] = devfs_add_devswf(&fd_cdevsw, mynor, DV_BLK,
 806                                                 UID_ROOT, GID_OPERATOR, 0640,
 807                                                 "fd%d", fdu);
 808                 fd->cdevs[0] = devfs_add_devswf(&fd_cdevsw, mynor, DV_CHR,
 809                                                 UID_ROOT, GID_OPERATOR, 0640,
 810                                                 "rfd%d", fdu);
 811                 for (i = 1; i < 1 + NUMDENS; i++) {
 812                         /*
 813                          * XXX this and the lookup in Fdopen() should be
 814                          * data driven.
 815                          */
 816                         switch (fd->type) {
 817                         case FD_360:
 818                                 if (i != FD_360)
 819                                         continue;
 820                                 break;
 821                         case FD_720:
 822                                 if (i != FD_720 && i != FD_800 && i != FD_820)
 823                                         continue;
 824                                 break;
 825                         case FD_1200:
 826                                 if (i != FD_360 && i != FD_720 && i != FD_800
 827                                     && i != FD_820 && i != FD_1200
 828                                     && i != FD_1440 && i != FD_1480)
 829                                         continue;
 830                                 break;
 831                         case FD_1440:
 832                                 if (i != FD_720 && i != FD_800 && i != FD_820
 833                                     && i != FD_1200 && i != FD_1440
 834                                     && i != FD_1480 && i != FD_1720)
 835                                         continue;
 836                                 break;
 837                         }
 838                         typesize = fd_types[i - 1].size / 2;
 839                         /*
 840                          * XXX all these conversions give bloated code and
 841                          * confusing names.
 842                          */
 843                         if (typesize == 1476)
 844                                 typesize = 1480;
 845                         if (typesize == 1722)
 846                                 typesize = 1720;
 847                         typemynor = mynor | i;
 848                         fd->bdevs[i] =
 849                                 devfs_add_devswf(&fd_cdevsw, typemynor, DV_BLK,
 850                                                  UID_ROOT, GID_OPERATOR, 0640,
 851                                                  "fd%d.%d", fdu, typesize);
 852                         fd->cdevs[i] =
 853                                 devfs_add_devswf(&fd_cdevsw, typemynor, DV_CHR,
 854                                                  UID_ROOT, GID_OPERATOR, 0640,
 855                                                  "rfd%d.%d", fdu, typesize);
 856                 }
 857
 858                 for (i = 0; i < MAXPARTITIONS; i++) {
 859                         fd->bdevs[1 + NUMDENS + i] = devfs_makelink(fd->bdevs[0],
 860                                            "fd%d%c", fdu, 'a' + i);
 861                         fd->cdevs[1 + NUMDENS + i] =
 862                                 devfs_makelink(fd->cdevs[0],
 863                                            "rfd%d%c", fdu, 'a' + i);
 864                 }
 865 #endif /* DEVFS */
 866                 /*
 867                  * Export the drive to the devstat interface.
 868                  */
 869                 devstat_add_entry(&fd->device_stats, "fd",
 870                                   fdu, 512,
 871                                   DEVSTAT_NO_ORDERED_TAGS,
 872                                   DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
 873                                   DEVSTAT_PRIORITY_FD);
 874
 875         }
 876
 877         return (1);
 878 }
 879
 880
 881
 882 #ifdef FDC_YE
 883 /*
 884  * this is a subset of fdattach() optimized for the Y-E Data
 885  * PCMCIA floppy drive.
 886  */
 887 static int yeattach(struct isa_device *dev)
 888 {
 889         fdcu_t  fdcu = dev->id_unit;
 890         fdc_p   fdc = fdc_data + fdcu;
 891         fdsu_t  fdsu = 0;               /* assume 1 drive per YE controller */
 892         fdu_t   fdu;
 893         fd_p    fd;
 894         int     st0, st3, i;
 895 #ifdef DEVFS
 896         int     mynor;
 897         int     typemynor;
 898         int     typesize;
 899 #endif
 900         fdc->fdcu = fdcu;
 901         /*
 902          * the FDC_PCMCIA flag is used to to indicate special PIO is used
 903          * instead of DMA
 904          */
 905         fdc->flags = FDC_ATTACHED|FDC_PCMCIA;
 906         fdc->state = DEVIDLE;
 907         /* reset controller, turn motor off, clear fdout mirror reg */
 908         outb(fdc->baseport + FDOUT, ((fdc->fdout = 0)));
 909         bufq_init(&fdc->head);
 910         /*
 911          * assume 2 drives/ "normal" controller
 912          */
 913         fdu = fdcu * 2;
 914         if (fdu >= NFD) {
 915                 printf("fdu %d >= NFD\n",fdu);
 916                 return(0);
 917         };
 918         fd = &fd_data[fdu];
 919
 920         set_motor(fdcu, fdsu, TURNON);
 921         DELAY(1000000); /* 1 sec */
 922         fdc->fdct = FDC_NE765;
 923
 924         if ((fd_cmd(fdcu, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) &&
 925                 (st3 & NE7_ST3_T0)) {
 926                 /* if at track 0, first seek inwards */
 927                 /* seek some steps: */
 928                 (void)fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0);
 929                 DELAY(300000); /* ...wait a moment... */
 930                 (void)fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
 931         }
 932
 933         /* If we're at track 0 first seek inwards. */
 934         if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
 935                 /* Seek some steps... */
 936                 if (fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
 937                         /* ...wait a moment... */
 938                         DELAY(300000);
 939                         /* make ctrlr happy: */
 940                         (void)fd_sense_int(fdc, 0, 0);
 941                 }
 942         }
 943
 944         for(i = 0; i < 2; i++) {
 945                 /*
 946                  * we must recalibrate twice, just in case the
 947                  * heads have been beyond cylinder 76, since most
 948                  * FDCs still barf when attempting to recalibrate
 949                  * more than 77 steps
 950                  */
 951                 /* go back to 0: */
 952                 if (fd_cmd(fdcu, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
 953                         /* a second being enough for full stroke seek*/
 954                         DELAY(i == 0? 1000000: 300000);
 955
 956                         /* anything responding? */
 957                         if (fd_sense_int(fdc, &st0, 0) == 0 &&
 958                                 (st0 & NE7_ST0_EC) == 0)
 959                                 break; /* already probed succesfully */
 960                 }
 961         }
 962
 963         set_motor(fdcu, fdsu, TURNOFF);
 964
 965         if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
 966                 return(0);
 967
 968         fd->track = FD_NO_TRACK;
 969         fd->fdc = fdc;
 970         fd->fdsu = fdsu;
 971         fd->options = 0;
 972         printf("fdc%d: 1.44MB 3.5in PCMCIA\n", fdcu);
 973         fd->type = FD_1440;
 974
 975 #ifdef DEVFS
 976         mynor = fdcu << 6;
 977         fd->bdevs[0] = devfs_add_devswf(&fd_cdevsw, mynor, DV_BLK,
 978                 UID_ROOT, GID_OPERATOR, 0640,
 979                 "fd%d", fdu);
 980         fd->cdevs[0] = devfs_add_devswf(&fd_cdevsw, mynor, DV_CHR,
 981                 UID_ROOT, GID_OPERATOR, 0640,
 982                 "rfd%d", fdu);
 983         /*
 984          * XXX this and the lookup in Fdopen() should be
 985          * data driven.
 986          */
 987         typemynor = mynor | FD_1440;
 988         typesize = fd_types[FD_1440 - 1].size / 2;
 989         /*
 990          * XXX all these conversions give bloated code and
 991          * confusing names.
 992          */
 993         if (typesize == 1476)
 994                 typesize = 1480;
 995         if (typesize == 1722)
 996                 typesize = 1720;
 997         fd->bdevs[FD_1440] = devfs_add_devswf(&fd_cdevsw, typemynor,
 998                 DV_BLK, UID_ROOT, GID_OPERATOR,
 999                 0640, "fd%d.%d", fdu, typesize);
1000         fd->cdevs[FD_1440] = devfs_add_devswf(&fd_cdevsw, typemynor,
1001                 DV_CHR, UID_ROOT, GID_OPERATOR,
1002                 0640,"rfd%d.%d", fdu, typesize);
1003         for (i = 0; i < MAXPARTITIONS; i++) {
1004                 fd->bdevs[1 + NUMDENS + i] = devfs_makelink(fd->bdevs[0],
1005                         "fd%d%c", fdu, 'a' + i);
1006                 fd->cdevs[1 + NUMDENS + i] = devfs_makelink(fd->cdevs[0],
1007                         "rfd%d%c", fdu, 'a' + i);
1008         }
1009 #endif /* DEVFS */
1010         return (1);
1011 }
1012 #endif
1013
1014 /****************************************************************************/
1015 /*                            motor control stuff                           */
1016 /*              remember to not deselect the drive we're working on         */
1017 /****************************************************************************/
1018 static void
1019 set_motor(fdcu_t fdcu, int fdsu, int turnon)
1020 {
1021         int fdout = fdc_data[fdcu].fdout;
1022         int needspecify = 0;
1023
1024         if(turnon) {
1025                 fdout &= ~FDO_FDSEL;
1026                 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1027         } else
1028                 fdout &= ~(FDO_MOEN0 << fdsu);
1029
1030         if(!turnon
1031            && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1032                 /* gonna turn off the last drive, put FDC to bed */
1033                 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1034         else {
1035                 /* make sure controller is selected and specified */
1036                 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1037                         needspecify = 1;
1038                 fdout |= (FDO_FRST|FDO_FDMAEN);
1039         }
1040
1041         outb(fdc_data[fdcu].baseport+FDOUT, fdout);
1042         fdc_data[fdcu].fdout = fdout;
1043         TRACE1("[0x%x->FDOUT]", fdout);
1044
1045         if(needspecify) {
1046                 /*
1047                  * XXX
1048                  * special case: since we have just woken up the FDC
1049                  * from its sleep, we silently assume the command will
1050                  * be accepted, and do not test for a timeout
1051                  */
1052                 (void)fd_cmd(fdcu, 3, NE7CMD_SPECIFY,
1053                              NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1054                              0);
1055                 if (fdc_data[fdcu].flags & FDC_HAS_FIFO)
1056                         (void) enable_fifo(&fdc_data[fdcu]);
1057         }
1058 }
1059
1060 static void
1061 fd_turnoff(void *arg1)
1062 {
1063         fdu_t fdu = (fdu_t)arg1;
1064         int     s;
1065         fd_p fd = fd_data + fdu;
1066
1067         TRACE1("[fd%d: turnoff]", fdu);
1068
1069         /*
1070          * Don't turn off the motor yet if the drive is active.
1071          * XXX shouldn't even schedule turnoff until drive is inactive
1072          * and nothing is queued on it.
1073          */
1074         if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fdu) {
1075                 fd->toffhandle = timeout(fd_turnoff, arg1, 4 * hz);
1076                 return;
1077         }
1078
1079         s = splbio();
1080         fd->flags &= ~FD_MOTOR;
1081         set_motor(fd->fdc->fdcu, fd->fdsu, TURNOFF);
1082         splx(s);
1083 }
1084
1085 static void
1086 fd_motor_on(void *arg1)
1087 {
1088         fdu_t fdu = (fdu_t)arg1;
1089         int     s;
1090
1091         fd_p fd = fd_data + fdu;
1092         s = splbio();
1093         fd->flags &= ~FD_MOTOR_WAIT;
1094         if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1095         {
1096                 fdintr(fd->fdc->fdcu);
1097         }
1098         splx(s);
1099 }
1100
1101 static void
1102 fd_turnon(fdu_t fdu)
1103 {
1104         fd_p fd = fd_data + fdu;
1105         if(!(fd->flags & FD_MOTOR))
1106         {
1107                 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1108                 set_motor(fd->fdc->fdcu, fd->fdsu, TURNON);
1109                 timeout(fd_motor_on, (caddr_t)fdu, hz); /* in 1 sec its ok */
1110         }
1111 }
1112
1113 static void
1114 fdc_reset(fdc_p fdc)
1115 {
1116         fdcu_t fdcu = fdc->fdcu;
1117
1118         /* Try a reset, keep motor on */
1119         outb(fdc->baseport + FDOUT, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1120         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1121         DELAY(100);
1122         /* enable FDC, but defer interrupts a moment */
1123         outb(fdc->baseport + FDOUT, fdc->fdout & ~FDO_FDMAEN);
1124         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1125         DELAY(100);
1126         outb(fdc->baseport + FDOUT, fdc->fdout);
1127         TRACE1("[0x%x->FDOUT]", fdc->fdout);
1128
1129         /* XXX after a reset, silently believe the FDC will accept commands */
1130         (void)fd_cmd(fdcu, 3, NE7CMD_SPECIFY,
1131                      NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1132                      0);
1133         if (fdc->flags & FDC_HAS_FIFO)
1134                 (void) enable_fifo(fdc);
1135 }
1136
1137 /****************************************************************************/
1138 /*                             fdc in/out                                   */
1139 /****************************************************************************/
1140 int
1141 in_fdc(fdcu_t fdcu)
1142 {
1143         int baseport = fdc_data[fdcu].baseport;
1144         int i, j = 100000;
1145         while ((i = inb(baseport+FDSTS) & (NE7_DIO|NE7_RQM))
1146                 != (NE7_DIO|NE7_RQM) && j-- > 0)
1147                 if (i == NE7_RQM)
1148                         return fdc_err(fdcu, "ready for output in input\n");
1149         if (j <= 0)
1150                 return fdc_err(fdcu, bootverbose? "input ready timeout\n": 0);
1151 #ifdef  FDC_DEBUG
1152         i = inb(baseport+FDDATA);
1153         TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1154         return(i);
1155 #else   /* !FDC_DEBUG */
1156         return inb(baseport+FDDATA);
1157 #endif  /* FDC_DEBUG */
1158 }
1159
1160 /*
1161  * fd_in: Like in_fdc, but allows you to see if it worked.
1162  */
1163 static int
1164 fd_in(fdcu_t fdcu, int *ptr)
1165 {
1166         int baseport = fdc_data[fdcu].baseport;
1167         int i, j = 100000;
1168         while ((i = inb(baseport+FDSTS) & (NE7_DIO|NE7_RQM))
1169                 != (NE7_DIO|NE7_RQM) && j-- > 0)
1170                 if (i == NE7_RQM)
1171                         return fdc_err(fdcu, "ready for output in input\n");
1172         if (j <= 0)
1173                 return fdc_err(fdcu, bootverbose? "input ready timeout\n": 0);
1174 #ifdef  FDC_DEBUG
1175         i = inb(baseport+FDDATA);
1176         TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1177         *ptr = i;
1178         return 0;
1179 #else   /* !FDC_DEBUG */
1180         i = inb(baseport+FDDATA);
1181         if (ptr)
1182                 *ptr = i;
1183         return 0;
1184 #endif  /* FDC_DEBUG */
1185 }
1186
1187 int
1188 out_fdc(fdcu_t fdcu, int x)
1189 {
1190         int baseport = fdc_data[fdcu].baseport;
1191         int i;
1192
1193         /* Check that the direction bit is set */
1194         i = 100000;
1195         while ((inb(baseport+FDSTS) & NE7_DIO) && i-- > 0);
1196         if (i <= 0) return fdc_err(fdcu, "direction bit not set\n");
1197
1198         /* Check that the floppy controller is ready for a command */
1199         i = 100000;
1200         while ((inb(baseport+FDSTS) & NE7_RQM) == 0 && i-- > 0);
1201         if (i <= 0)
1202                 return fdc_err(fdcu, bootverbose? "output ready timeout\n": 0);
1203
1204         /* Send the command and return */
1205         outb(baseport+FDDATA, x);
1206         TRACE1("[0x%x->FDDATA]", x);
1207         return (0);
1208 }
1209
1210 /****************************************************************************/
1211 /*                           fdopen/fdclose                                 */
1212 /****************************************************************************/
1213 int
1214 Fdopen(dev_t dev, int flags, int mode, struct proc *p)
1215 {
1216         fdu_t fdu = FDUNIT(minor(dev));
1217         int type = FDTYPE(minor(dev));
1218         fdc_p   fdc;
1219
1220         /* check bounds */
1221         if (fdu >= NFD)
1222                 return(ENXIO);
1223         fdc = fd_data[fdu].fdc;
1224         if ((fdc == NULL) || (fd_data[fdu].type == NO_TYPE))
1225                 return(ENXIO);
1226         if (type > NUMDENS)
1227                 return(ENXIO);
1228         if (type == 0)
1229                 type = fd_data[fdu].type;
1230         else {
1231                 /*
1232                  * For each type of basic drive, make sure we are trying
1233                  * to open a type it can do,
1234                  */
1235                 if (type != fd_data[fdu].type) {
1236                         switch (fd_data[fdu].type) {
1237                         case FD_360:
1238                                 return(ENXIO);
1239                         case FD_720:
1240                                 if (   type != FD_820
1241                                     && type != FD_800
1242                                    )
1243                                         return(ENXIO);
1244                                 break;
1245                         case FD_1200:
1246                                 switch (type) {
1247                                 case FD_1480:
1248                                         type = FD_1480in5_25;
1249                                         break;
1250                                 case FD_1440:
1251                                         type = FD_1440in5_25;
1252                                         break;
1253                                 case FD_820:
1254                                         type = FD_820in5_25;
1255                                         break;
1256                                 case FD_800:
1257                                         type = FD_800in5_25;
1258                                         break;
1259                                 case FD_720:
1260                                         type = FD_720in5_25;
1261                                         break;
1262                                 case FD_360:
1263                                         type = FD_360in5_25;
1264                                         break;
1265                                 default:
1266                                         return(ENXIO);
1267                                 }
1268                                 break;
1269                         case FD_1440:
1270                                 if (   type != FD_1720
1271                                     && type != FD_1480
1272                                     && type != FD_1200
1273                                     && type != FD_820
1274                                     && type != FD_800
1275                                     && type != FD_720
1276                                     )
1277                                         return(ENXIO);
1278                                 break;
1279                         }
1280                 }
1281         }
1282         fd_data[fdu].ft = fd_types + type - 1;
1283         fd_data[fdu].flags |= FD_OPEN;
1284
1285         return 0;
1286 }
1287
1288 int
1289 fdclose(dev_t dev, int flags, int mode, struct proc *p)
1290 {
1291         fdu_t fdu = FDUNIT(minor(dev));
1292
1293         fd_data[fdu].flags &= ~FD_OPEN;
1294         fd_data[fdu].options &= ~FDOPT_NORETRY;
1295
1296         return(0);
1297 }
1298
1299 static int
1300 fdread(dev_t dev, struct uio *uio, int ioflag)
1301 {
1302         return (physio(fdstrategy, NULL, dev, 1, minphys, uio));
1303 }
1304
1305 static int
1306 fdwrite(dev_t dev, struct uio *uio, int ioflag)
1307 {
1308         return (physio(fdstrategy, NULL, dev, 0, minphys, uio));
1309 }
1310
1311
1312 /****************************************************************************/
1313 /*                               fdstrategy                                 */
1314 /****************************************************************************/
1315 void
1316 fdstrategy(struct buf *bp)
1317 {
1318         unsigned nblocks, blknum, cando;
1319         int     s;
1320         fdcu_t  fdcu;
1321         fdu_t   fdu;
1322         fdc_p   fdc;
1323         fd_p    fd;
1324         size_t  fdblk;
1325
1326         fdu = FDUNIT(minor(bp->b_dev));
1327         fd = &fd_data[fdu];
1328         fdc = fd->fdc;
1329         fdcu = fdc->fdcu;
1330 #ifdef FDC_YE
1331         if (fd->type == NO_TYPE) {
1332                 bp->b_error = ENXIO;
1333                 bp->b_flags |= B_ERROR;
1334                 /*
1335                  * I _refuse_ to use a goto
1336                  */
1337                 biodone(bp);
1338                 return;
1339         };
1340 #endif
1341
1342         fdblk = 128 << (fd->ft->secsize);
1343         if (!(bp->b_flags & B_FORMAT)) {
1344                 if ((fdu >= NFD) || (bp->b_blkno < 0)) {
1345                         printf(
1346                 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
1347                                fdu, (u_long)bp->b_blkno, bp->b_bcount);
1348                         bp->b_error = EINVAL;
1349                         bp->b_flags |= B_ERROR;
1350                         goto bad;
1351                 }
1352                 if ((bp->b_bcount % fdblk) != 0) {
1353                         bp->b_error = EINVAL;
1354                         bp->b_flags |= B_ERROR;
1355                         goto bad;
1356                 }
1357         }
1358
1359         /*
1360          * Set up block calculations.
1361          */
1362         if (bp->b_blkno > 20000000) {
1363                 /*
1364                  * Reject unreasonably high block number, prevent the
1365                  * multiplication below from overflowing.
1366                  */
1367                 bp->b_error = EINVAL;
1368                 bp->b_flags |= B_ERROR;
1369                 goto bad;
1370         }
1371         blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk;
1372         nblocks = fd->ft->size;
1373         bp->b_resid = 0;
1374         if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1375                 if (blknum <= nblocks) {
1376                         cando = (nblocks - blknum) * fdblk;
1377                         bp->b_resid = bp->b_bcount - cando;
1378                         if (cando == 0)
1379                                 goto bad;       /* not actually bad but EOF */
1380                 } else {
1381                         bp->b_error = EINVAL;
1382                         bp->b_flags |= B_ERROR;
1383                         goto bad;
1384                 }
1385         }
1386         bp->b_pblkno = bp->b_blkno;
1387         s = splbio();
1388         bufqdisksort(&fdc->head, bp);
1389         untimeout(fd_turnoff, (caddr_t)fdu, fd->toffhandle); /* a good idea */
1390
1391         /* Tell devstat we are starting on the transaction */
1392         devstat_start_transaction(&fd->device_stats);
1393
1394         fdstart(fdcu);
1395         splx(s);
1396         return;
1397
1398 bad:
1399         biodone(bp);
1400 }
1401
1402 /***************************************************************\
1403 *                               fdstart                         *
1404 * We have just queued something.. if the controller is not busy *
1405 * then simulate the case where it has just finished a command   *
1406 * So that it (the interrupt routine) looks on the queue for more*
1407 * work to do and picks up what we just added.                   *
1408 * If the controller is already busy, we need do nothing, as it  *
1409 * will pick up our work when the present work completes         *
1410 \***************************************************************/
1411 static void
1412 fdstart(fdcu_t fdcu)
1413 {
1414         int s;
1415
1416         s = splbio();
1417         if(fdc_data[fdcu].state == DEVIDLE)
1418         {
1419                 fdintr(fdcu);
1420         }
1421         splx(s);
1422 }
1423
1424 static void
1425 fd_iotimeout(void *arg1)
1426 {
1427         fdc_p fdc;
1428         fdcu_t fdcu;
1429         int s;
1430
1431         fdcu = (fdcu_t)arg1;
1432         fdc = fdc_data + fdcu;
1433         TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1434
1435         /*
1436          * Due to IBM's brain-dead design, the FDC has a faked ready
1437          * signal, hardwired to ready == true. Thus, any command
1438          * issued if there's no diskette in the drive will _never_
1439          * complete, and must be aborted by resetting the FDC.
1440          * Many thanks, Big Blue!
1441          * The FDC must not be reset directly, since that would
1442          * interfere with the state machine.  Instead, pretend that
1443          * the command completed but was invalid.  The state machine
1444          * will reset the FDC and retry once.
1445          */
1446         s = splbio();
1447         fdc->status[0] = NE7_ST0_IC_IV;
1448         fdc->flags &= ~FDC_STAT_VALID;
1449         fdc->state = IOTIMEDOUT;
1450         fdintr(fdcu);
1451         splx(s);
1452 }
1453
1454 /* just ensure it has the right spl */
1455 static void
1456 fd_pseudointr(void *arg1)
1457 {
1458         fdcu_t fdcu = (fdcu_t)arg1;
1459         int     s;
1460
1461         s = splbio();
1462         fdintr(fdcu);
1463         splx(s);
1464 }
1465
1466 /***********************************************************************\
1467 *                                 fdintr                                *
1468 * keep calling the state machine until it returns a 0                   *
1469 * ALWAYS called at SPLBIO                                               *
1470 \***********************************************************************/
1471 static void
1472 fdintr(fdcu_t fdcu)
1473 {
1474         fdc_p fdc = fdc_data + fdcu;
1475                 while(fdstate(fdcu, fdc))
1476                         ;
1477 }
1478
1479 #ifdef FDC_YE
1480 /*
1481  * magic pseudo-DMA initialization for YE FDC. Sets count and
1482  * direction
1483  */
1484 #define SET_BCDR(wr,cnt,port) outb(port,(((cnt)-1) & 0xff)); \
1485         outb(port+1,((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)))
1486
1487 /*
1488  * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1489  */
1490 static int fdcpio(fdcu_t fdcu, long flags, caddr_t addr, u_int count)
1491 {
1492         u_char *cptr = (u_char *)addr;
1493         fdc_p fdc = &fdc_data[fdcu];
1494         int io = fdc->baseport;
1495
1496         if (flags & B_READ) {
1497                 if (fdc->state != PIOREAD) {
1498                         fdc->state = PIOREAD;
1499                         return(0);
1500                 };
1501                 SET_BCDR(0,count,io);
1502                 insb(io+FDC_YE_DATAPORT,cptr,count);
1503         } else {
1504                 outsb(io+FDC_YE_DATAPORT,cptr,count);
1505                 SET_BCDR(0,count,io);
1506         };
1507         return(1);
1508 }
1509 #endif /* FDC_YE */
1510
1511 /***********************************************************************\
1512 * The controller state machine.                                         *
1513 * if it returns a non zero value, it should be called again immediatly  *
1514 \***********************************************************************/
1515 static int
1516 fdstate(fdcu_t fdcu, fdc_p fdc)
1517 {
1518         int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1519         unsigned blknum = 0, b_cylinder = 0;
1520         fdu_t fdu = fdc->fdu;
1521         fd_p fd;
1522         register struct buf *bp;
1523         struct fd_formb *finfo = NULL;
1524         size_t fdblk;
1525
1526         bp = fdc->bp;
1527         if (bp == NULL) {
1528                 bp = bufq_first(&fdc->head);
1529                 if (bp != NULL) {
1530                         bufq_remove(&fdc->head, bp);
1531                         fdc->bp = bp;
1532                 }
1533         }
1534         if (bp == NULL) {
1535                 /***********************************************\
1536                 * nothing left for this controller to do        *
1537                 * Force into the IDLE state,                    *
1538                 \***********************************************/
1539                 fdc->state = DEVIDLE;
1540                 if(fdc->fd)
1541                 {
1542                         printf("fd%d: unexpected valid fd pointer\n",
1543                                fdc->fdu);
1544                         fdc->fd = (fd_p) 0;
1545                         fdc->fdu = -1;
1546                 }
1547                 TRACE1("[fdc%d IDLE]", fdcu);
1548                 return(0);
1549         }
1550         fdu = FDUNIT(minor(bp->b_dev));
1551         fd = fd_data + fdu;
1552         fdblk = 128 << fd->ft->secsize;
1553         if (fdc->fd && (fd != fdc->fd))
1554         {
1555                 printf("fd%d: confused fd pointers\n", fdu);
1556         }
1557         read = bp->b_flags & B_READ;
1558         format = bp->b_flags & B_FORMAT;
1559         if(format) {
1560                 finfo = (struct fd_formb *)bp->b_data;
1561                 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1562                         - (char *)finfo;
1563         }
1564         if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1565                 blknum = (unsigned) bp->b_pblkno * DEV_BSIZE/fdblk +
1566                         fd->skip/fdblk;
1567                 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1568         }
1569         TRACE1("fd%d", fdu);
1570         TRACE1("[%s]", fdstates[fdc->state]);
1571         TRACE1("(0x%x)", fd->flags);
1572         untimeout(fd_turnoff, (caddr_t)fdu, fd->toffhandle);
1573         fd->toffhandle = timeout(fd_turnoff, (caddr_t)fdu, 4 * hz);
1574         switch (fdc->state)
1575         {
1576         case DEVIDLE:
1577         case FINDWORK:  /* we have found new work */
1578                 fdc->retry = 0;
1579                 fd->skip = 0;
1580                 fdc->fd = fd;
1581                 fdc->fdu = fdu;
1582                 outb(fdc->baseport+FDCTL, fd->ft->trans);
1583                 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1584                 /*******************************************************\
1585                 * If the next drive has a motor startup pending, then   *
1586                 * it will start up in its own good time         *
1587                 \*******************************************************/
1588                 if(fd->flags & FD_MOTOR_WAIT)
1589                 {
1590                         fdc->state = MOTORWAIT;
1591                         return(0); /* come back later */
1592                 }
1593                 /*******************************************************\
1594                 * Maybe if it's not starting, it SHOULD be starting     *
1595                 \*******************************************************/
1596                 if (!(fd->flags & FD_MOTOR))
1597                 {
1598                         fdc->state = MOTORWAIT;
1599                         fd_turnon(fdu);
1600                         return(0);
1601                 }
1602                 else    /* at least make sure we are selected */
1603                 {
1604                         set_motor(fdcu, fd->fdsu, TURNON);
1605                 }
1606                 if (fdc->flags & FDC_NEEDS_RESET) {
1607                         fdc->state = RESETCTLR;
1608                         fdc->flags &= ~FDC_NEEDS_RESET;
1609                 } else
1610                         fdc->state = DOSEEK;
1611                 break;
1612         case DOSEEK:
1613                 if (b_cylinder == (unsigned)fd->track)
1614                 {
1615                         fdc->state = SEEKCOMPLETE;
1616                         break;
1617                 }
1618                 if (fd_cmd(fdcu, 3, NE7CMD_SEEK,
1619                            fd->fdsu, b_cylinder * fd->ft->steptrac,
1620                            0))
1621                 {
1622                         /*
1623                          * seek command not accepted, looks like
1624                          * the FDC went off to the Saints...
1625                          */
1626                         fdc->retry = 6; /* try a reset */
1627                         return(retrier(fdcu));
1628                 }
1629                 fd->track = FD_NO_TRACK;
1630                 fdc->state = SEEKWAIT;
1631                 return(0);      /* will return later */
1632         case SEEKWAIT:
1633                 /* allow heads to settle */
1634                 timeout(fd_pseudointr, (caddr_t)fdcu, hz / 16);
1635                 fdc->state = SEEKCOMPLETE;
1636                 return(0);      /* will return later */
1637         case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1638                 /* Make sure seek really happened*/
1639                 if(fd->track == FD_NO_TRACK)
1640                 {
1641                         int descyl = b_cylinder * fd->ft->steptrac;
1642                         do {
1643                                 /*
1644                                  * This might be a "ready changed" interrupt,
1645                                  * which cannot really happen since the
1646                                  * RDY pin is hardwired to + 5 volts.  This
1647                                  * generally indicates a "bouncing" intr
1648                                  * line, so do one of the following:
1649                                  *
1650                                  * When running on an enhanced FDC that is
1651                                  * known to not go stuck after responding
1652                                  * with INVALID, fetch all interrupt states
1653                                  * until seeing either an INVALID or a
1654                                  * real interrupt condition.
1655                                  *
1656                                  * When running on a dumb old NE765, give
1657                                  * up immediately.  The controller will
1658                                  * provide up to four dummy RC interrupt
1659                                  * conditions right after reset (for the
1660                                  * corresponding four drives), so this is
1661                                  * our only chance to get notice that it
1662                                  * was not the FDC that caused the interrupt.
1663                                  */
1664                                 if (fd_sense_int(fdc, &st0, &cyl)
1665                                     == FD_NOT_VALID)
1666                                         return 0;
1667                                 if(fdc->fdct == FDC_NE765
1668                                    && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1669                                         return 0; /* hope for a real intr */
1670                         } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1671
1672                         if (0 == descyl)
1673                         {
1674                                 int failed = 0;
1675                                 /*
1676                                  * seek to cyl 0 requested; make sure we are
1677                                  * really there
1678                                  */
1679                                 if (fd_sense_drive_status(fdc, &st3))
1680                                         failed = 1;
1681                                 if ((st3 & NE7_ST3_T0) == 0) {
1682                                         printf(
1683                 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1684                                                fdu, st3, NE7_ST3BITS);
1685                                         failed = 1;
1686                                 }
1687
1688                                 if (failed)
1689                                 {
1690                                         if(fdc->retry < 3)
1691                                                 fdc->retry = 3;
1692                                         return(retrier(fdcu));
1693                                 }
1694                         }
1695
1696                         if (cyl != descyl)
1697                         {
1698                                 printf(
1699                 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1700                                        fdu, descyl, cyl, st0);
1701                                 if (fdc->retry < 3)
1702                                         fdc->retry = 3;
1703                                 return(retrier(fdcu));
1704                         }
1705                 }
1706
1707                 fd->track = b_cylinder;
1708 #ifdef FDC_YE
1709                 if (!(fdc->flags & FDC_PCMCIA))
1710 #endif
1711                         isa_dmastart(bp->b_flags, bp->b_data+fd->skip,
1712                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
1713                 sectrac = fd->ft->sectrac;
1714                 sec = blknum %  (sectrac * fd->ft->heads);
1715                 head = sec / sectrac;
1716                 sec = sec % sectrac + 1;
1717                 fd->hddrv = ((head&1)<<2)+fdu;
1718
1719                 if(format || !read)
1720                 {
1721                         /* make sure the drive is writable */
1722                         if(fd_sense_drive_status(fdc, &st3) != 0)
1723                         {
1724                                 /* stuck controller? */
1725                                 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1726                                             format ? bp->b_bcount : fdblk,
1727                                             fdc->dmachan);
1728                                 fdc->retry = 6; /* reset the beast */
1729                                 return(retrier(fdcu));
1730                         }
1731                         if(st3 & NE7_ST3_WP)
1732                         {
1733                                 /*
1734                                  * XXX YES! this is ugly.
1735                                  * in order to force the current operation
1736                                  * to fail, we will have to fake an FDC
1737                                  * error - all error handling is done
1738                                  * by the retrier()
1739                                  */
1740                                 fdc->status[0] = NE7_ST0_IC_AT;
1741                                 fdc->status[1] = NE7_ST1_NW;
1742                                 fdc->status[2] = 0;
1743                                 fdc->status[3] = fd->track;
1744                                 fdc->status[4] = head;
1745                                 fdc->status[5] = sec;
1746                                 fdc->retry = 8; /* break out immediately */
1747                                 fdc->state = IOTIMEDOUT; /* not really... */
1748                                 return (1);
1749                         }
1750                 }
1751
1752                 if(format)
1753                 {
1754 #ifdef FDC_YE
1755                         if (fdc->flags & FDC_PCMCIA)
1756                                 (void)fdcpio(fdcu,bp->b_flags,
1757                                         bp->b_data+fd->skip,
1758                                         bp->b_bcount);
1759 #endif
1760                         /* formatting */
1761                         if(fd_cmd(fdcu, 6,
1762                                   NE7CMD_FORMAT,
1763                                   head << 2 | fdu,
1764                                   finfo->fd_formb_secshift,
1765                                   finfo->fd_formb_nsecs,
1766                                   finfo->fd_formb_gaplen,
1767                                   finfo->fd_formb_fillbyte,
1768                                   0))
1769                         {
1770                                 /* controller fell over */
1771                                 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1772                                             format ? bp->b_bcount : fdblk,
1773                                             fdc->dmachan);
1774                                 fdc->retry = 6;
1775                                 return(retrier(fdcu));
1776                         }
1777                 }
1778                 else
1779                 {
1780 #ifdef FDC_YE
1781                         if (fdc->flags & FDC_PCMCIA) {
1782                                 /*
1783                                  * this seems to be necessary even when
1784                                  * reading data
1785                                  */
1786                                 SET_BCDR(1,fdblk,fdc->baseport);
1787
1788                                 /*
1789                                  * perform the write pseudo-DMA before
1790                                  * the WRITE command is sent
1791                                  */
1792                                 if (!read)
1793                                         (void)fdcpio(fdcu,bp->b_flags,
1794                                             bp->b_data+fd->skip,
1795                                             fdblk);
1796                         }
1797 #endif
1798                         if (fd_cmd(fdcu, 9,
1799                                    (read ? NE7CMD_READ : NE7CMD_WRITE),
1800                                    head << 2 | fdu,  /* head & unit */
1801                                    fd->track,        /* track */
1802                                    head,
1803                                    sec,              /* sector + 1 */
1804                                    fd->ft->secsize,  /* sector size */
1805                                    sectrac,          /* sectors/track */
1806                                    fd->ft->gap,      /* gap size */
1807                                    fd->ft->datalen,  /* data length */
1808                                    0))
1809                         {
1810                                 /* the beast is sleeping again */
1811                                 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1812                                             format ? bp->b_bcount : fdblk,
1813                                             fdc->dmachan);
1814                                 fdc->retry = 6;
1815                                 return(retrier(fdcu));
1816                         }
1817                 }
1818 #ifdef FDC_YE
1819                 if (fdc->flags & FDC_PCMCIA)
1820                         /*
1821                          * if this is a read, then simply await interrupt
1822                          * before performing PIO
1823                          */
1824                         if (read && !fdcpio(fdcu,bp->b_flags,
1825                             bp->b_data+fd->skip,fdblk)) {
1826                                 fd->tohandle = timeout(fd_iotimeout,
1827                                         (caddr_t)fdcu, hz);
1828                                 return(0);      /* will return later */
1829                         };
1830
1831                 /*
1832                  * write (or format) operation will fall through and
1833                  * await completion interrupt
1834                  */
1835 #endif
1836                 fdc->state = IOCOMPLETE;
1837                 fd->tohandle = timeout(fd_iotimeout, (caddr_t)fdcu, hz);
1838                 return(0);      /* will return later */
1839 #ifdef FDC_YE
1840         case PIOREAD:
1841                 /*
1842                  * actually perform the PIO read.  The IOCOMPLETE case
1843                  * removes the timeout for us.
1844                  */
1845                 (void)fdcpio(fdcu,bp->b_flags,bp->b_data+fd->skip,fdblk);
1846                 fdc->state = IOCOMPLETE;
1847                 /* FALLTHROUGH */
1848 #endif
1849         case IOCOMPLETE: /* IO DONE, post-analyze */
1850                 untimeout(fd_iotimeout, (caddr_t)fdcu, fd->tohandle);
1851
1852                 if (fd_read_status(fdc, fd->fdsu))
1853                 {
1854                         isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1855                                     format ? bp->b_bcount : fdblk,
1856                                     fdc->dmachan);
1857                         if (fdc->retry < 6)
1858                                 fdc->retry = 6; /* force a reset */
1859                         return retrier(fdcu);
1860                 }
1861
1862                 fdc->state = IOTIMEDOUT;
1863
1864                 /* FALLTHROUGH */
1865
1866         case IOTIMEDOUT:
1867 #ifdef FDC_YE
1868                 if (!(fdc->flags & FDC_PCMCIA))
1869 #endif
1870                         isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1871                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
1872                 if (fdc->status[0] & NE7_ST0_IC)
1873                 {
1874                         if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1875                             && fdc->status[1] & NE7_ST1_OR) {
1876                                 /*
1877                                  * DMA overrun. Someone hogged the bus
1878                                  * and didn't release it in time for the
1879                                  * next FDC transfer.
1880                                  * Just restart it, don't increment retry
1881                                  * count. (vak)
1882                                  */
1883                                 fdc->state = SEEKCOMPLETE;
1884                                 return (1);
1885                         }
1886                         else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
1887                                 && fdc->retry < 6)
1888                                 fdc->retry = 6; /* force a reset */
1889                         else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1890                                 && fdc->status[2] & NE7_ST2_WC
1891                                 && fdc->retry < 3)
1892                                 fdc->retry = 3; /* force recalibrate */
1893                         return(retrier(fdcu));
1894                 }
1895                 /* All OK */
1896                 fd->skip += fdblk;
1897                 if (!format && fd->skip < bp->b_bcount - bp->b_resid)
1898                 {
1899                         /* set up next transfer */
1900                         fdc->state = DOSEEK;
1901                 }
1902                 else
1903                 {
1904                         /* ALL DONE */
1905                         fd->skip = 0;
1906                         fdc->bp = NULL;
1907                         /* Tell devstat we have finished with the transaction */
1908                         devstat_end_transaction(&fd->device_stats,
1909                                                 bp->b_bcount - bp->b_resid,
1910                                                 DEVSTAT_TAG_NONE,
1911                                                 (bp->b_flags & B_READ) ?
1912                                                 DEVSTAT_READ : DEVSTAT_WRITE);
1913                         biodone(bp);
1914                         fdc->fd = (fd_p) 0;
1915                         fdc->fdu = -1;
1916                         fdc->state = FINDWORK;
1917                 }
1918                 return(1);
1919         case RESETCTLR:
1920                 fdc_reset(fdc);
1921                 fdc->retry++;
1922                 fdc->state = RESETCOMPLETE;
1923                 return (0);
1924         case RESETCOMPLETE:
1925                 /*
1926                  * Discard all the results from the reset so that they
1927                  * can't cause an unexpected interrupt later.
1928                  */
1929                 for (i = 0; i < 4; i++)
1930                         (void)fd_sense_int(fdc, &st0, &cyl);
1931                 fdc->state = STARTRECAL;
1932                 /* Fall through. */
1933         case STARTRECAL:
1934                 if(fd_cmd(fdcu,
1935                           2, NE7CMD_RECAL, fdu,
1936                           0)) /* Recalibrate Function */
1937                 {
1938                         /* arrgl */
1939                         fdc->retry = 6;
1940                         return(retrier(fdcu));
1941                 }
1942                 fdc->state = RECALWAIT;
1943                 return(0);      /* will return later */
1944         case RECALWAIT:
1945                 /* allow heads to settle */
1946                 timeout(fd_pseudointr, (caddr_t)fdcu, hz / 8);
1947                 fdc->state = RECALCOMPLETE;
1948                 return(0);      /* will return later */
1949         case RECALCOMPLETE:
1950                 do {
1951                         /*
1952                          * See SEEKCOMPLETE for a comment on this:
1953                          */
1954                         if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
1955                                 return 0;
1956                         if(fdc->fdct == FDC_NE765
1957                            && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1958                                 return 0; /* hope for a real intr */
1959                 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1960                 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
1961                 {
1962                         if(fdc->retry > 3)
1963                                 /*
1964                                  * a recalibrate from beyond cylinder 77
1965                                  * will "fail" due to the FDC limitations;
1966                                  * since people used to complain much about
1967                                  * the failure message, try not logging
1968                                  * this one if it seems to be the first
1969                                  * time in a line
1970                                  */
1971                                 printf("fd%d: recal failed ST0 %b cyl %d\n",
1972                                        fdu, st0, NE7_ST0BITS, cyl);
1973                         if(fdc->retry < 3) fdc->retry = 3;
1974                         return(retrier(fdcu));
1975                 }
1976                 fd->track = 0;
1977                 /* Seek (probably) necessary */
1978                 fdc->state = DOSEEK;
1979                 return(1);      /* will return immediatly */
1980         case MOTORWAIT:
1981                 if(fd->flags & FD_MOTOR_WAIT)
1982                 {
1983                         return(0); /* time's not up yet */
1984                 }
1985                 if (fdc->flags & FDC_NEEDS_RESET) {
1986                         fdc->state = RESETCTLR;
1987                         fdc->flags &= ~FDC_NEEDS_RESET;
1988                 } else {
1989                         /*
1990                          * If all motors were off, then the controller was
1991                          * reset, so it has lost track of the current
1992                          * cylinder.  Recalibrate to handle this case.
1993                          */
1994                         fdc->state = STARTRECAL;
1995                 }
1996                 return(1);      /* will return immediatly */
1997         default:
1998                 printf("fdc%d: Unexpected FD int->", fdcu);
1999                 if (fd_read_status(fdc, fd->fdsu) == 0)
2000                         printf("FDC status :%x %x %x %x %x %x %x   ",
2001                                fdc->status[0],
2002                                fdc->status[1],
2003                                fdc->status[2],
2004                                fdc->status[3],
2005                                fdc->status[4],
2006                                fdc->status[5],
2007                                fdc->status[6] );
2008                 else
2009                         printf("No status available   ");
2010                 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2011                 {
2012                         printf("[controller is dead now]\n");
2013                         return(0);
2014                 }
2015                 printf("ST0 = %x, PCN = %x\n", st0, cyl);
2016                 return(0);
2017         }
2018         /*XXX confusing: some branches return immediately, others end up here*/
2019         return(1); /* Come back immediatly to new state */
2020 }
2021
2022 static int
2023 retrier(fdcu)
2024         fdcu_t fdcu;
2025 {
2026         fdc_p fdc = fdc_data + fdcu;
2027         register struct buf *bp;
2028
2029         bp = fdc->bp;
2030
2031         if(fd_data[FDUNIT(minor(bp->b_dev))].options & FDOPT_NORETRY)
2032                 goto fail;
2033         switch(fdc->retry)
2034         {
2035         case 0: case 1: case 2:
2036                 fdc->state = SEEKCOMPLETE;
2037                 break;
2038         case 3: case 4: case 5:
2039                 fdc->state = STARTRECAL;
2040                 break;
2041         case 6:
2042                 fdc->state = RESETCTLR;
2043                 break;
2044         case 7:
2045                 break;
2046         default:
2047         fail:
2048                 {
2049                         dev_t sav_b_dev = bp->b_dev;
2050                         /* Trick diskerr */
2051                         bp->b_dev = makedev(major(bp->b_dev),
2052                                     (FDUNIT(minor(bp->b_dev))<<3)|RAW_PART);
2053                         diskerr(bp, "fd", "hard error", LOG_PRINTF,
2054                                 fdc->fd->skip / DEV_BSIZE,
2055                                 (struct disklabel *)NULL);
2056                         bp->b_dev = sav_b_dev;
2057                         if (fdc->flags & FDC_STAT_VALID)
2058                         {
2059                                 printf(
2060                         " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2061                                        fdc->status[0], NE7_ST0BITS,
2062                                        fdc->status[1], NE7_ST1BITS,
2063                                        fdc->status[2], NE7_ST2BITS,
2064                                        fdc->status[3], fdc->status[4],
2065                                        fdc->status[5]);
2066                         }
2067                         else
2068                                 printf(" (No status)\n");
2069                 }
2070                 bp->b_flags |= B_ERROR;
2071                 bp->b_error = EIO;
2072                 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2073                 fdc->bp = NULL;
2074
2075                 /* Tell devstat we have finished with the transaction */
2076                 devstat_end_transaction(&fdc->fd->device_stats,
2077                                         bp->b_bcount - bp->b_resid,
2078                                         DEVSTAT_TAG_NONE,
2079                                         (bp->b_flags & B_READ) ? DEVSTAT_READ :
2080                                                                  DEVSTAT_WRITE);
2081                 fdc->fd->skip = 0;
2082                 biodone(bp);
2083                 fdc->state = FINDWORK;
2084                 fdc->flags |= FDC_NEEDS_RESET;
2085                 fdc->fd = (fd_p) 0;
2086                 fdc->fdu = -1;
2087                 return(1);
2088         }
2089         fdc->retry++;
2090         return(1);
2091 }
2092
2093 static int
2094 fdformat(dev, finfo, p)
2095         dev_t dev;
2096         struct fd_formb *finfo;
2097         struct proc *p;
2098 {
2099         fdu_t   fdu;
2100         fd_p    fd;
2101
2102         struct buf *bp;
2103         int rv = 0, s;
2104         size_t fdblk;
2105
2106         fdu     = FDUNIT(minor(dev));
2107         fd      = &fd_data[fdu];
2108         fdblk = 128 << fd->ft->secsize;
2109
2110         /* set up a buffer header for fdstrategy() */
2111         bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT);
2112         if(bp == 0)
2113                 return ENOBUFS;
2114         /*
2115          * keep the process from being swapped
2116          */
2117         p->p_flag |= P_PHYSIO;
2118         bzero((void *)bp, sizeof(struct buf));
2119         bp->b_flags = B_BUSY | B_PHYS | B_FORMAT;
2120         bp->b_proc = p;
2121
2122         /*
2123          * calculate a fake blkno, so fdstrategy() would initiate a
2124          * seek to the requested cylinder
2125          */
2126         bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
2127                 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
2128
2129         bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2130         bp->b_data = (caddr_t)finfo;
2131
2132         /* now do the format */
2133         bp->b_dev = dev;
2134         fdstrategy(bp);
2135
2136         /* ...and wait for it to complete */
2137         s = splbio();
2138         while(!(bp->b_flags & B_DONE))
2139         {
2140                 rv = tsleep((caddr_t)bp, PRIBIO, "fdform", 20 * hz);
2141                 if(rv == EWOULDBLOCK)
2142                         break;
2143         }
2144         splx(s);
2145
2146         if(rv == EWOULDBLOCK) {
2147                 /* timed out */
2148                 rv = EIO;
2149                 biodone(bp);
2150         }
2151         if(bp->b_flags & B_ERROR)
2152                 rv = bp->b_error;
2153         /*
2154          * allow the process to be swapped
2155          */
2156         p->p_flag &= ~P_PHYSIO;
2157         free(bp, M_TEMP);
2158         return rv;
2159 }
2160
2161 /*
2162  * TODO: don't allocate buffer on stack.
2163  */
2164
2165 static int
2166 fdioctl(dev, cmd, addr, flag, p)
2167         dev_t dev;
2168         u_long cmd;
2169         caddr_t addr;
2170         int flag;
2171         struct proc *p;
2172 {
2173         fdu_t   fdu = FDUNIT(minor(dev));
2174         fd_p    fd = &fd_data[fdu];
2175         size_t fdblk;
2176
2177         struct fd_type *fdt;
2178         struct disklabel *dl;
2179         char buffer[DEV_BSIZE];
2180         int error = 0;
2181
2182         fdblk = 128 << fd->ft->secsize;
2183
2184         switch (cmd)
2185         {
2186         case DIOCGDINFO:
2187                 bzero(buffer, sizeof (buffer));
2188                 dl = (struct disklabel *)buffer;
2189                 dl->d_secsize = fdblk;
2190                 fdt = fd_data[FDUNIT(minor(dev))].ft;
2191                 dl->d_secpercyl = fdt->size / fdt->tracks;
2192                 dl->d_type = DTYPE_FLOPPY;
2193
2194                 if (readdisklabel(dkmodpart(dev, RAW_PART), fdstrategy, dl)
2195                     == NULL)
2196                         error = 0;
2197                 else
2198                         error = EINVAL;
2199
2200                 *(struct disklabel *)addr = *dl;
2201                 break;
2202
2203         case DIOCSDINFO:
2204                 if ((flag & FWRITE) == 0)
2205                         error = EBADF;
2206                 break;
2207
2208         case DIOCWLABEL:
2209                 if ((flag & FWRITE) == 0)
2210                         error = EBADF;
2211                 break;
2212
2213         case DIOCWDINFO:
2214                 if ((flag & FWRITE) == 0)
2215                 {
2216                         error = EBADF;
2217                         break;
2218                 }
2219
2220                 dl = (struct disklabel *)addr;
2221
2222                 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2223                                           (u_long)0)) != 0)
2224                         break;
2225
2226                 error = writedisklabel(dev, fdstrategy,
2227                                        (struct disklabel *)buffer);
2228                 break;
2229         case FD_FORM:
2230                 if((flag & FWRITE) == 0)
2231                         error = EBADF;  /* must be opened for writing */
2232                 else if(((struct fd_formb *)addr)->format_version !=
2233                         FD_FORMAT_VERSION)
2234                         error = EINVAL; /* wrong version of formatting prog */
2235                 else
2236                         error = fdformat(dev, (struct fd_formb *)addr, p);
2237                 break;
2238
2239         case FD_GTYPE:                  /* get drive type */
2240                 *(struct fd_type *)addr = *fd->ft;
2241                 break;
2242
2243         case FD_STYPE:                  /* set drive type */
2244                 /* this is considered harmful; only allow for superuser */
2245                 if(suser(p->p_ucred, &p->p_acflag) != 0)
2246                         return EPERM;
2247                 *fd->ft = *(struct fd_type *)addr;
2248                 break;
2249
2250         case FD_GOPTS:                  /* get drive options */
2251                 *(int *)addr = fd->options;
2252                 break;
2253
2254         case FD_SOPTS:                  /* set drive options */
2255                 fd->options = *(int *)addr;
2256                 break;
2257
2258         default:
2259                 error = ENOTTY;
2260                 break;
2261         }
2262         return (error);
2263 }
2264
2265
2266 static fd_devsw_installed = 0;
2267
2268 static void     fd_drvinit(void *notused )
2269 {
2270
2271         if( ! fd_devsw_installed ) {
2272                 cdevsw_add_generic(BDEV_MAJOR,CDEV_MAJOR, &fd_cdevsw);
2273                 fd_devsw_installed = 1;
2274         }
2275 }
2276
2277 SYSINIT(fddev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,fd_drvinit,NULL)
2278
2279
2280 #endif
2281
2282 /*
2283  * Hello emacs, these are the
2284  * Local Variables:
2285  *  c-indent-level:               8
2286  *  c-continued-statement-offset: 8
2287  *  c-continued-brace-offset:     0
2288  *  c-brace-offset:              -8
2289  *  c-brace-imaginary-offset:     0
2290  *  c-argdecl-indent:             8
2291  *  c-label-offset:              -8
2292  *  c++-hanging-braces:           1
2293  *  c++-access-specifier-offset: -8
2294  *  c++-empty-arglist-indent:     8
2295  *  c++-friend-offset:            0
2296  * End:
2297  */