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 1.142 1999/05/08 21:59:24 dfr 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/buf.h>
  64 #include <sys/bus.h>
  65 #include <sys/conf.h>
  66 #include <sys/disklabel.h>
  67 #include <sys/devicestat.h>
  68 #include <sys/fcntl.h>
  69 #include <sys/malloc.h>
  70 #include <sys/module.h>
  71 #include <sys/proc.h>
  72 #include <sys/syslog.h>
  73
  74 #include <sys/bus.h>
  75 #include <machine/bus.h>
  76 #include <sys/rman.h>
  77
  78 #include <machine/clock.h>
  79 #include <machine/ioctl_fd.h>
  80 #include <machine/resource.h>
  81 #include <machine/stdarg.h>
  82
  83 #ifdef  DEVFS
  84 #include <sys/devfsext.h>
  85 #endif  /* DEVFS */
  86
  87 #include <isa/isavar.h>
  88 #include <i386/isa/isa.h>
  89 #include <i386/isa/isa_dma.h>
  90 #include <i386/isa/fdreg.h>
  91 #include <i386/isa/fdc.h>
  92 #include <i386/isa/rtc.h>
  93
  94 #ifdef FDC_YE
  95 #undef FDC_YE
  96 #warning "fix FDC_YE! - newbus casualty"
  97 #endif
  98
  99 /* misuse a flag to identify format operation */
 100 #define B_FORMAT B_XXX
 101
 102 /* configuration flags */
 103 #define FDC_PRETEND_D0  (1 << 0)        /* pretend drive 0 to be there */
 104 #ifdef FDC_YE
 105 #define FDC_IS_PCMCIA  (1 << 1)         /* if successful probe, then it's
 106                                            a PCMCIA device */
 107 #endif
 108
 109 /* internally used only, not really from CMOS: */
 110 #define RTCFDT_144M_PRETENDED   0x1000
 111
 112 /* error returns for fd_cmd() */
 113 #define FD_FAILED -1
 114 #define FD_NOT_VALID -2
 115 #define FDC_ERRMAX      100     /* do not log more */
 116
 117 #define NUMTYPES 14
 118 #define NUMDENS  (NUMTYPES - 6)
 119
 120 /* These defines (-1) must match index for fd_types */
 121 #define F_TAPE_TYPE     0x020   /* bit for fd_types to indicate tape */
 122 #define NO_TYPE         0       /* must match NO_TYPE in ft.c */
 123 #define FD_1720         1
 124 #define FD_1480         2
 125 #define FD_1440         3
 126 #define FD_1200         4
 127 #define FD_820          5
 128 #define FD_800          6
 129 #define FD_720          7
 130 #define FD_360          8
 131
 132 #define FD_1480in5_25   9
 133 #define FD_1440in5_25   10
 134 #define FD_820in5_25    11
 135 #define FD_800in5_25    12
 136 #define FD_720in5_25    13
 137 #define FD_360in5_25    14
 138
 139
 140 static struct fd_type fd_types[NUMTYPES] =
 141 {
 142 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
 143 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
 144 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
 145 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /*  1.2M in HD 5.25/3.5 */
 146 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /*  820K in HD 3.5in */
 147 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /*  800K in HD 3.5in */
 148 {  9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /*  720K in HD 3.5in */
 149 {  9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /*  360K in DD 5.25in */
 150
 151 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
 152 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
 153 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /*  820K in HD 5.25in */
 154 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /*  800K in HD 5.25in */
 155 {  9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /*  720K in HD 5.25in */
 156 {  9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /*  360K in HD 5.25in */
 157 };
 158
 159 #define DRVS_PER_CTLR 2         /* 2 floppies */
 160
 161 /***********************************************************************\
 162 * Per controller structure.                                             *
 163 \***********************************************************************/
 164 static devclass_t fdc_devclass;
 165
 166 /***********************************************************************\
 167 * Per drive structure.                                                  *
 168 * N per controller  (DRVS_PER_CTLR)                                     *
 169 \***********************************************************************/
 170 struct fd_data {
 171         struct  fdc_data *fdc;  /* pointer to controller structure */
 172         int     fdsu;           /* this units number on this controller */
 173         int     type;           /* Drive type (FD_1440...) */
 174         struct  fd_type *ft;    /* pointer to the type descriptor */
 175         int     flags;
 176 #define FD_OPEN         0x01    /* it's open            */
 177 #define FD_ACTIVE       0x02    /* it's active          */
 178 #define FD_MOTOR        0x04    /* motor should be on   */
 179 #define FD_MOTOR_WAIT   0x08    /* motor coming up      */
 180         int     skip;
 181         int     hddrv;
 182 #define FD_NO_TRACK -2
 183         int     track;          /* where we think the head is */
 184         int     options;        /* user configurable options, see ioctl_fd.h */
 185         struct  callout_handle toffhandle;
 186         struct  callout_handle tohandle;
 187         struct  devstat device_stats;
 188 #ifdef DEVFS
 189         void    *bdevs[1 + NUMDENS + MAXPARTITIONS];
 190         void    *cdevs[1 + NUMDENS + MAXPARTITIONS];
 191 #endif
 192         device_t dev;
 193         fdu_t   fdu;
 194 };
 195 static devclass_t fd_devclass;
 196
 197 /***********************************************************************\
 198 * Throughout this file the following conventions will be used:          *
 199 * fd is a pointer to the fd_data struct for the drive in question       *
 200 * fdc is a pointer to the fdc_data struct for the controller            *
 201 * fdu is the floppy drive unit number                                   *
 202 * fdcu is the floppy controller unit number                             *
 203 * fdsu is the floppy drive unit number on that controller. (sub-unit)   *
 204 \***********************************************************************/
 205
 206 #ifdef FDC_YE
 207 #include "card.h"
 208 static int yeattach(struct isa_device *);
 209 #endif
 210
 211 /* needed for ft driver, thus exported */
 212 int in_fdc(struct fdc_data *);
 213 int out_fdc(struct fdc_data *, int);
 214
 215 /* internal functions */
 216 static  void fdc_add_device(device_t, const char *, int);
 217 static  void fdc_intr(void *);
 218 static void set_motor(struct fdc_data *, int, int);
 219 #  define TURNON 1
 220 #  define TURNOFF 0
 221 static timeout_t fd_turnoff;
 222 static timeout_t fd_motor_on;
 223 static void fd_turnon(struct fd_data *);
 224 static void fdc_reset(fdc_p);
 225 static int fd_in(struct fdc_data *, int *);
 226 static void fdstart(struct fdc_data *);
 227 static timeout_t fd_iotimeout;
 228 static timeout_t fd_pseudointr;
 229 static int fdstate(struct fdc_data *);
 230 static int retrier(struct fdc_data *);
 231 static int fdformat(dev_t, struct fd_formb *, struct proc *);
 232
 233 static int enable_fifo(fdc_p fdc);
 234
 235 static int fifo_threshold = 8;  /* XXX: should be accessible via sysctl */
 236
 237
 238 #define DEVIDLE         0
 239 #define FINDWORK        1
 240 #define DOSEEK          2
 241 #define SEEKCOMPLETE    3
 242 #define IOCOMPLETE      4
 243 #define RECALCOMPLETE   5
 244 #define STARTRECAL      6
 245 #define RESETCTLR       7
 246 #define SEEKWAIT        8
 247 #define RECALWAIT       9
 248 #define MOTORWAIT       10
 249 #define IOTIMEDOUT      11
 250 #define RESETCOMPLETE   12
 251 #ifdef FDC_YE
 252 #define PIOREAD         13
 253 #endif
 254
 255 #ifdef  FDC_DEBUG
 256 static char const * const fdstates[] =
 257 {
 258 "DEVIDLE",
 259 "FINDWORK",
 260 "DOSEEK",
 261 "SEEKCOMPLETE",
 262 "IOCOMPLETE",
 263 "RECALCOMPLETE",
 264 "STARTRECAL",
 265 "RESETCTLR",
 266 "SEEKWAIT",
 267 "RECALWAIT",
 268 "MOTORWAIT",
 269 "IOTIMEDOUT",
 270 "RESETCOMPLETE",
 271 #ifdef FDC_YE
 272 "PIOREAD",
 273 #endif
 274 };
 275
 276 /* CAUTION: fd_debug causes huge amounts of logging output */
 277 static int volatile fd_debug = 0;
 278 #define TRACE0(arg) if(fd_debug) printf(arg)
 279 #define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2)
 280 #else /* FDC_DEBUG */
 281 #define TRACE0(arg)
 282 #define TRACE1(arg1, arg2)
 283 #endif /* FDC_DEBUG */
 284
 285 #ifdef FDC_YE
 286 #if NCARD > 0
 287 #include <sys/select.h>
 288 #include <sys/module.h>
 289 #include <pccard/cardinfo.h>
 290 #include <pccard/driver.h>
 291 #include <pccard/slot.h>
 292
 293 /*
 294  *      PC-Card (PCMCIA) specific code.
 295  */
 296 static int yeinit(struct pccard_devinfo *);             /* init device */
 297 static void yeunload(struct pccard_devinfo *);          /* Disable driver */
 298 static int yeintr(struct pccard_devinfo *);             /* Interrupt handler */
 299
 300 PCCARD_MODULE(fdc, yeinit, yeunload, yeintr, 0, bio_imask);
 301
 302 /*
 303  * this is the secret PIO data port (offset from base)
 304  */
 305 #define FDC_YE_DATAPORT 6
 306
 307 /*
 308  *      Initialize the device - called from Slot manager.
 309  */
 310 static int yeinit(struct pccard_devinfo *devi)
 311 {
 312         fdc_p fdc = &fdc_data[devi->isahd.id_unit];
 313
 314         /* validate unit number. */
 315         if (devi->isahd.id_unit >= NFDC)
 316                 return(ENODEV);
 317         fdc->baseport = devi->isahd.id_iobase;
 318         /*
 319          * reset controller
 320          */
 321         outb(fdc->baseport+FDOUT, 0);
 322         DELAY(100);
 323         outb(fdc->baseport+FDOUT, FDO_FRST);
 324
 325         /*
 326          * wire into system
 327          */
 328         if (yeattach(&devi->isahd) == 0)
 329                 return(ENXIO);
 330
 331         return(0);
 332 }
 333
 334 /*
 335  *      yeunload - unload the driver and clear the table.
 336  *      XXX TODO:
 337  *      This is usually called when the card is ejected, but
 338  *      can be caused by a modunload of a controller driver.
 339  *      The idea is to reset the driver's view of the device
 340  *      and ensure that any driver entry points such as
 341  *      read and write do not hang.
 342  */
 343 static void yeunload(struct pccard_devinfo *devi)
 344 {
 345         if (fd_data[devi->isahd.id_unit].type == NO_TYPE)
 346                 return;
 347
 348         /*
 349          * this prevents Fdopen() and fdstrategy() from attempting
 350          * to access unloaded controller
 351          */
 352         fd_data[devi->isahd.id_unit].type = NO_TYPE;
 353
 354         printf("fdc%d: unload\n", devi->isahd.id_unit);
 355 }
 356
 357 /*
 358  *      yeintr - Shared interrupt called from
 359  *      front end of PC-Card handler.
 360  */
 361 static int yeintr(struct pccard_devinfo *devi)
 362 {
 363         fdintr((fdcu_t)devi->isahd.id_unit);
 364         return(1);
 365 }
 366 #endif /* NCARD > 0 */
 367 #endif /* FDC_YE */
 368
 369 static  d_open_t        Fdopen; /* NOTE, not fdopen */
 370 static  d_close_t       fdclose;
 371 static  d_ioctl_t       fdioctl;
 372 static  d_strategy_t    fdstrategy;
 373
 374 static struct cdevsw fd_cdevsw = {
 375           Fdopen,       fdclose,        physread,       physwrite,
 376           fdioctl,      nostop,         nullreset,      nodevtotty,
 377           seltrue,      nommap,         fdstrategy,     "fd",
 378           NULL,         -1,             nodump,         nopsize,
 379           D_DISK,       0,              -1
 380 };
 381 #define CDEV_MAJOR 9
 382 #define BDEV_MAJOR 2
 383
 384 static int
 385 fdc_err(struct fdc_data *fdc, const char *s)
 386 {
 387         fdc->fdc_errs++;
 388         if (s) {
 389                 if (fdc->fdc_errs < FDC_ERRMAX) {
 390                         device_print_prettyname(fdc->fdc_dev);
 391                         printf("%s", s);
 392                 } else if (fdc->fdc_errs == FDC_ERRMAX) {
 393                         device_print_prettyname(fdc->fdc_dev);
 394                         printf("too many errors, not logging any more\n");
 395                 }
 396         }
 397
 398         return FD_FAILED;
 399 }
 400
 401 /*
 402  * fd_cmd: Send a command to the chip.  Takes a varargs with this structure:
 403  * Unit number,
 404  * # of output bytes, output bytes as ints ...,
 405  * # of input bytes, input bytes as ints ...
 406  */
 407 static int
 408 fd_cmd(struct fdc_data *fdc, int n_out, ...)
 409 {
 410         u_char cmd;
 411         int n_in;
 412         int n;
 413         va_list ap;
 414
 415         va_start(ap, n_out);
 416         cmd = (u_char)(va_arg(ap, int));
 417         va_end(ap);
 418         va_start(ap, n_out);
 419         for (n = 0; n < n_out; n++)
 420         {
 421                 if (out_fdc(fdc, va_arg(ap, int)) < 0)
 422                 {
 423                         char msg[50];
 424                         snprintf(msg, sizeof(msg),
 425                                 "cmd %x failed at out byte %d of %d\n",
 426                                 cmd, n + 1, n_out);
 427                         return fdc_err(fdc, msg);
 428                 }
 429         }
 430         n_in = va_arg(ap, int);
 431         for (n = 0; n < n_in; n++)
 432         {
 433                 int *ptr = va_arg(ap, int *);
 434                 if (fd_in(fdc, ptr) < 0)
 435                 {
 436                         char msg[50];
 437                         snprintf(msg, sizeof(msg),
 438                                 "cmd %02x failed at in byte %d of %d\n",
 439                                 cmd, n + 1, n_in);
 440                         return fdc_err(fdc, msg);
 441                 }
 442         }
 443
 444         return 0;
 445 }
 446
 447 static int
 448 enable_fifo(fdc_p fdc)
 449 {
 450         int i, j;
 451
 452         if ((fdc->flags & FDC_HAS_FIFO) == 0) {
 453
 454                 /*
 455                  * XXX:
 456                  * Cannot use fd_cmd the normal way here, since
 457                  * this might be an invalid command. Thus we send the
 458                  * first byte, and check for an early turn of data directon.
 459                  */
 460
 461                 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
 462                         return fdc_err(fdc, "Enable FIFO failed\n");
 463
 464                 /* If command is invalid, return */
 465                 j = 100000;
 466                 while ((i = inb(fdc->baseport + FDSTS) & (NE7_DIO | NE7_RQM))
 467                        != NE7_RQM && j-- > 0)
 468                         if (i == (NE7_DIO | NE7_RQM)) {
 469                                 fdc_reset(fdc);
 470                                 return FD_FAILED;
 471                         }
 472                 if (j<0 ||
 473                     fd_cmd(fdc, 3,
 474                            0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
 475                         fdc_reset(fdc);
 476                         return fdc_err(fdc, "Enable FIFO failed\n");
 477                 }
 478                 fdc->flags |= FDC_HAS_FIFO;
 479                 return 0;
 480         }
 481         if (fd_cmd(fdc, 4,
 482                    I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
 483                 return fdc_err(fdc, "Re-enable FIFO failed\n");
 484         return 0;
 485 }
 486
 487 static int
 488 fd_sense_drive_status(fdc_p fdc, int *st3p)
 489 {
 490         int st3;
 491
 492         if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
 493         {
 494                 return fdc_err(fdc, "Sense Drive Status failed\n");
 495         }
 496         if (st3p)
 497                 *st3p = st3;
 498
 499         return 0;
 500 }
 501
 502 static int
 503 fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
 504 {
 505         int cyl, st0, ret;
 506
 507         ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
 508         if (ret) {
 509                 (void)fdc_err(fdc,
 510                               "sense intr err reading stat reg 0\n");
 511                 return ret;
 512         }
 513
 514         if (st0p)
 515                 *st0p = st0;
 516
 517         if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
 518                 /*
 519                  * There doesn't seem to have been an interrupt.
 520                  */
 521                 return FD_NOT_VALID;
 522         }
 523
 524         if (fd_in(fdc, &cyl) < 0) {
 525                 return fdc_err(fdc, "can't get cyl num\n");
 526         }
 527
 528         if (cylp)
 529                 *cylp = cyl;
 530
 531         return 0;
 532 }
 533
 534
 535 static int
 536 fd_read_status(fdc_p fdc, int fdsu)
 537 {
 538         int i, ret;
 539
 540         for (i = 0; i < 7; i++) {
 541                 /*
 542                  * XXX types are poorly chosen.  Only bytes can by read
 543                  * from the hardware, but fdc->status[] wants u_ints and
 544                  * fd_in() gives ints.
 545                  */
 546                 int status;
 547
 548                 ret = fd_in(fdc, &status);
 549                 fdc->status[i] = status;
 550                 if (ret != 0)
 551                         break;
 552         }
 553
 554         if (ret == 0)
 555                 fdc->flags |= FDC_STAT_VALID;
 556         else
 557                 fdc->flags &= ~FDC_STAT_VALID;
 558
 559         return ret;
 560 }
 561
 562 /****************************************************************************/
 563 /*                      autoconfiguration stuff                             */
 564 /****************************************************************************/
 565
 566 static int
 567 fdc_probe(device_t dev)
 568 {
 569         int     error, i, ic_type;
 570         struct  fdc_data *fdc;
 571         char    myname[8];      /* better be long enough */
 572
 573         fdc = device_get_softc(dev);
 574         bzero(fdc, sizeof *fdc);
 575         fdc->fdc_dev = dev;
 576         fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
 577         fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
 578
 579         fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
 580                                              &fdc->rid_ioport, 0ul, ~0ul,
 581                                              IO_FDCSIZE, RF_ACTIVE);
 582         if (fdc->res_ioport == 0) {
 583                 device_print_prettyname(dev);
 584                 printf("cannot reserve I/O port range\n");
 585                 error = ENXIO;
 586                 goto out;
 587         }
 588         fdc->baseport = fdc->res_ioport->r_start;
 589
 590         fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
 591                                           &fdc->rid_irq, 0ul, ~0ul, 1,
 592                                           RF_ACTIVE);
 593         if (fdc->res_irq == 0) {
 594                 device_print_prettyname(dev);
 595                 printf("cannot reserve interrupt line\n");
 596                 error = ENXIO;
 597                 goto out;
 598         }
 599         fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
 600                                           &fdc->rid_drq, 0ul, ~0ul, 1,
 601                                           RF_ACTIVE);
 602         if (fdc->res_drq == 0) {
 603                 device_print_prettyname(dev);
 604                 printf("cannot reserve DMA request line\n");
 605                 error = ENXIO;
 606                 goto out;
 607         }
 608         fdc->dmachan = fdc->res_drq->r_start;
 609         error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
 610                                INTR_TYPE_BIO, fdc_intr, fdc, &fdc->fdc_intr);
 611
 612         /* First - lets reset the floppy controller */
 613         outb(fdc->baseport + FDOUT, 0);
 614         DELAY(100);
 615         outb(fdc->baseport + FDOUT, FDO_FRST);
 616
 617         /* see if it can handle a command */
 618         if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
 619                    NE7_SPEC_2(2, 0), 0)) {
 620                 error = ENXIO;
 621                 goto out;
 622         }
 623
 624         if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
 625                 ic_type = (u_char)ic_type;
 626                 switch (ic_type) {
 627                 case 0x80:
 628                         device_set_desc(dev, "NEC 765 or clone");
 629                         fdc->fdct = FDC_NE765;
 630                         break;
 631                 case 0x81:
 632                         device_set_desc(dev, "Intel 82077 or clone");
 633                         fdc->fdct = FDC_I82077;
 634                         break;
 635                 case 0x90:
 636                         device_set_desc(dev, "NEC 72065B or clone");
 637                         fdc->fdct = FDC_NE72065;
 638                         break;
 639                 default:
 640                         device_set_desc(dev, "generic floppy controller");
 641                         fdc->fdct = FDC_UNKNOWN;
 642                         break;
 643                 }
 644         }
 645
 646         snprintf(myname, sizeof(myname), "%s%d", device_get_name(dev),
 647                  device_get_unit(dev));
 648         for (i = resource_query_string(-1, "at", myname); i != -1;
 649              i = resource_query_string(i, "at", myname))
 650                 fdc_add_device(dev, resource_query_name(i),
 651                                resource_query_unit(i));
 652 #ifdef FDC_YE
 653         /*
 654          * don't succeed on probe; wait
 655          * for PCCARD subsystem to do it
 656          */
 657         if (dev->id_flags & FDC_IS_PCMCIA)
 658                 return(0);
 659 #endif
 660         return (0);
 661
 662 out:
 663         if (fdc->fdc_intr)
 664                 BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq,
 665                                   fdc->fdc_intr);
 666         if (fdc->res_irq != 0) {
 667                 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
 668                                         fdc->res_irq);
 669                 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
 670                                      fdc->res_irq);
 671         }
 672         if (fdc->res_ioport != 0) {
 673                 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
 674                                         fdc->res_ioport);
 675                 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
 676                                      fdc->res_ioport);
 677         }
 678         if (fdc->res_drq != 0) {
 679                 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
 680                                         fdc->res_drq);
 681                 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
 682                                      fdc->res_drq);
 683         }
 684         return (error);
 685 }
 686
 687 /*
 688  * Aped dfr@freebsd.org's isa_add_device().
 689  */
 690 static void
 691 fdc_add_device(device_t dev, const char *name, int unit)
 692 {
 693         int     disabled, *ivar;
 694         device_t child;
 695
 696         ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT);
 697         if (ivar == 0)
 698                 return;
 699         if (resource_int_value(name, unit, "drive", ivar) == 0)
 700                 *ivar = 0;
 701         child = device_add_child(dev, name, unit, ivar);
 702         if (child == 0)
 703                 return;
 704         if (resource_int_value(name, unit, "disabled", &disabled) == 0)
 705                 device_disable(child);
 706 }
 707
 708 static int
 709 fdc_attach(device_t dev)
 710 {
 711         struct  fdc_data *fdc = device_get_softc(dev);
 712         fdcu_t  fdcu = device_get_unit(dev);
 713
 714         fdc->fdcu = fdcu;
 715         fdc->flags |= FDC_ATTACHED;
 716
 717         /* Acquire the DMA channel forever, The driver will do the rest */
 718                                 /* XXX should integrate with rman */
 719         isa_dma_acquire(fdc->dmachan);
 720         isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
 721         fdc->state = DEVIDLE;
 722
 723         /* reset controller, turn motor off, clear fdout mirror reg */
 724         outb(fdc->baseport + FDOUT, ((fdc->fdout = 0)));
 725         bufq_init(&fdc->head);
 726
 727 #ifdef FIFO_BEFORE_MOTORON
 728         /* Hmm, this doesn't work here - is set_motor() magic? -Peter */
 729         if (fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
 730             && enable_fifo(fdc) == 0) {
 731                 device_print_prettyname(dev);
 732                 printf("FIFO enabled, %d bytes threshold\n", fifo_threshold);
 733         }
 734 #endif
 735         /*
 736          * Probe and attach any children as were configured above.
 737          */
 738         return (bus_generic_attach(dev));
 739 }
 740
 741 static void
 742 fdc_print_child(device_t me, device_t child)
 743 {
 744         printf(" at %s%d drive %d", device_get_name(me), device_get_unit(me),
 745                *(int *)device_get_ivars(child));
 746 }
 747
 748 static int
 749 fd_probe(device_t dev)
 750 {
 751         int     i;
 752         u_int   fdt, st0, st3;
 753         struct  fd_data *fd;
 754         struct  fdc_data *fdc;
 755         fdsu_t  fdsu;
 756 #ifndef FIFO_BEFORE_MOTORON
 757         static int fd_fifo = 0;
 758 #endif
 759
 760         fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
 761         fd = device_get_softc(dev);
 762         fdc = device_get_softc(device_get_parent(dev));
 763
 764         bzero(fd, sizeof *fd);
 765         fd->dev = dev;
 766         fd->fdc = fdc;
 767         fd->fdsu = fdsu;
 768         fd->fdu = device_get_unit(dev);
 769
 770         /* look up what bios thinks we have */
 771         switch (fd->fdu) {
 772         case 0:
 773                 if (isa_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
 774                         fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
 775                 else
 776                         fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
 777                 break;
 778         case 1:
 779                 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
 780                 break;
 781         default:
 782                 fdt = RTCFDT_NONE;
 783                 break;
 784         }
 785
 786         /* is there a unit? */
 787         if (fdt == RTCFDT_NONE)
 788                 return (ENXIO);
 789
 790         /* select it */
 791         set_motor(fdc, fdsu, TURNON);
 792         DELAY(1000000); /* 1 sec */
 793
 794 #ifndef FIFO_BEFORE_MOTORON
 795         if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
 796             && enable_fifo(fdc) == 0) {
 797                 device_print_prettyname(device_get_parent(dev));
 798                 printf("FIFO enabled, %d bytes threshold\n", fifo_threshold);
 799         }
 800         fd_fifo = 1;
 801 #endif
 802
 803         if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
 804             && (st3 & NE7_ST3_T0)) {
 805                 /* if at track 0, first seek inwards */
 806                 /* seek some steps: */
 807                 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
 808                 DELAY(300000); /* ...wait a moment... */
 809                 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
 810         }
 811
 812         /* If we're at track 0 first seek inwards. */
 813         if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
 814                 /* Seek some steps... */
 815                 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
 816                         /* ...wait a moment... */
 817                         DELAY(300000);
 818                         /* make ctrlr happy: */
 819                         fd_sense_int(fdc, 0, 0);
 820                 }
 821         }
 822
 823         for (i = 0; i < 2; i++) {
 824                 /*
 825                  * we must recalibrate twice, just in case the
 826                  * heads have been beyond cylinder 76, since most
 827                  * FDCs still barf when attempting to recalibrate
 828                  * more than 77 steps
 829                  */
 830                 /* go back to 0: */
 831                 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
 832                         /* a second being enough for full stroke seek*/
 833                         DELAY(i == 0 ? 1000000 : 300000);
 834
 835                         /* anything responding? */
 836                         if (fd_sense_int(fdc, &st0, 0) == 0 &&
 837                             (st0 & NE7_ST0_EC) == 0)
 838                                 break; /* already probed succesfully */
 839                 }
 840         }
 841
 842         set_motor(fdc, fdsu, TURNOFF);
 843
 844         if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
 845                 return (ENXIO);
 846
 847         fd->track = FD_NO_TRACK;
 848         fd->fdc = fdc;
 849         fd->fdsu = fdsu;
 850         fd->options = 0;
 851         callout_handle_init(&fd->toffhandle);
 852         callout_handle_init(&fd->tohandle);
 853
 854         switch (fdt) {
 855         case RTCFDT_12M:
 856                 device_set_desc(dev, "1200-KB 5.25\" drive");
 857                 fd->type = FD_1200;
 858                 break;
 859         case RTCFDT_144M | RTCFDT_144M_PRETENDED:
 860                 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
 861                 fdt = RTCFDT_144M;
 862                 fd->type = FD_1440;
 863         case RTCFDT_144M:
 864                 device_set_desc(dev, "1440-KB 3.5\" drive");
 865                 fd->type = FD_1440;
 866                 break;
 867         case RTCFDT_288M:
 868         case RTCFDT_288M_1:
 869                 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
 870                 fd->type = FD_1440;
 871                 break;
 872         case RTCFDT_360K:
 873                 device_set_desc(dev, "360-KB 5.25\" drive");
 874                 fd->type = FD_360;
 875                 break;
 876         case RTCFDT_720K:
 877                 printf("720-KB 3.5\" drive");
 878                 fd->type = FD_720;
 879                 break;
 880         default:
 881                 return (ENXIO);
 882         }
 883         return (0);
 884 }
 885
 886 static int
 887 fd_attach(device_t dev)
 888 {
 889         struct  fd_data *fd;
 890 #ifdef DEVFS
 891         int     i;
 892         int     mynor;
 893         int     typemynor;
 894         int     typesize;
 895 #endif
 896
 897         fd = device_get_softc(dev);
 898
 899 #ifdef DEVFS                    /* XXX bitrot */
 900         mynor = fd->fdu << 6;
 901         fd->bdevs[0] = devfs_add_devswf(&fd_cdevsw, mynor, DV_BLK,
 902                                         UID_ROOT, GID_OPERATOR, 0640,
 903                                         "fd%d", fd->fdu);
 904         fd->cdevs[0] = devfs_add_devswf(&fd_cdevsw, mynor, DV_CHR,
 905                                         UID_ROOT, GID_OPERATOR, 0640,
 906                                         "rfd%d", fd->fdu);
 907         for (i = 1; i < 1 + NUMDENS; i++) {
 908                 /*
 909                  * XXX this and the lookup in Fdopen() should be
 910                  * data driven.
 911                  */
 912                 switch (fd->type) {
 913                 case FD_360:
 914                         if (i != FD_360)
 915                                 continue;
 916                         break;
 917                 case FD_720:
 918                         if (i != FD_720 && i != FD_800 && i != FD_820)
 919                                 continue;
 920                         break;
 921                 case FD_1200:
 922                         if (i != FD_360 && i != FD_720 && i != FD_800
 923                             && i != FD_820 && i != FD_1200
 924                             && i != FD_1440 && i != FD_1480)
 925                                 continue;
 926                         break;
 927                 case FD_1440:
 928                         if (i != FD_720 && i != FD_800 && i != FD_820
 929                             && i != FD_1200 && i != FD_1440
 930                             && i != FD_1480 && i != FD_1720)
 931                                 continue;
 932                         break;
 933                 }
 934                 typesize = fd_types[i - 1].size / 2;
 935                 /*
 936                  * XXX all these conversions give bloated code and
 937                  * confusing names.
 938                  */
 939                 if (typesize == 1476)
 940                         typesize = 1480;
 941                 if (typesize == 1722)
 942                         typesize = 1720;
 943                 typemynor = mynor | i;
 944                 fd->bdevs[i] =
 945                         devfs_add_devswf(&fd_cdevsw, typemynor, DV_BLK,
 946                                          UID_ROOT, GID_OPERATOR, 0640,
 947                                          "fd%d.%d", fd->fdu, typesize);
 948                 fd->cdevs[i] =
 949                         devfs_add_devswf(&fd_cdevsw, typemynor, DV_CHR,
 950                                          UID_ROOT, GID_OPERATOR, 0640,
 951                                          "rfd%d.%d", fd->fdu, typesize);
 952         }
 953
 954         for (i = 0; i < MAXPARTITIONS; i++) {
 955                 fd->bdevs[1 + NUMDENS + i] = devfs_makelink(fd->bdevs[0],
 956                                                 "fd%d%c", fd->fdu, 'a' + i);
 957                 fd->cdevs[1 + NUMDENS + i] =
 958                         devfs_makelink(fd->cdevs[0],
 959                                    "rfd%d%c", fd->fdu, 'a' + i);
 960         }
 961 #endif /* DEVFS */
 962         /*
 963          * Export the drive to the devstat interface.
 964          */
 965         devstat_add_entry(&fd->device_stats, device_get_name(dev),
 966                           device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
 967                           DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
 968                           DEVSTAT_PRIORITY_FD);
 969         return (0);
 970 }
 971
 972 #ifdef FDC_YE
 973 /*
 974  * this is a subset of fdattach() optimized for the Y-E Data
 975  * PCMCIA floppy drive.
 976  */
 977 static int yeattach(struct isa_device *dev)
 978 {
 979         fdcu_t  fdcu = dev->id_unit;
 980         fdc_p   fdc = fdc_data + fdcu;
 981         fdsu_t  fdsu = 0;               /* assume 1 drive per YE controller */
 982         fdu_t   fdu;
 983         fd_p    fd;
 984         int     st0, st3, i;
 985 #ifdef DEVFS
 986         int     mynor;
 987         int     typemynor;
 988         int     typesize;
 989 #endif
 990         fdc->fdcu = fdcu;
 991         /*
 992          * the FDC_PCMCIA flag is used to to indicate special PIO is used
 993          * instead of DMA
 994          */
 995         fdc->flags = FDC_ATTACHED|FDC_PCMCIA;
 996         fdc->state = DEVIDLE;
 997         /* reset controller, turn motor off, clear fdout mirror reg */
 998         outb(fdc->baseport + FDOUT, ((fdc->fdout = 0)));
 999         bufq_init(&fdc->head);
1000         /*
1001          * assume 2 drives/ "normal" controller
1002          */
1003         fdu = fdcu * 2;
1004         if (fdu >= NFD) {
1005                 printf("fdu %d >= NFD\n",fdu);
1006                 return(0);
1007         };
1008         fd = &fd_data[fdu];
1009
1010         set_motor(fdcu, fdsu, TURNON);
1011         DELAY(1000000); /* 1 sec */
1012         fdc->fdct = FDC_NE765;
1013
1014         if ((fd_cmd(fdcu, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) &&
1015                 (st3 & NE7_ST3_T0)) {
1016                 /* if at track 0, first seek inwards */
1017                 /* seek some steps: */
1018                 (void)fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0);
1019                 DELAY(300000); /* ...wait a moment... */
1020                 (void)fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
1021         }
1022
1023         /* If we're at track 0 first seek inwards. */
1024         if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
1025                 /* Seek some steps... */
1026                 if (fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
1027                         /* ...wait a moment... */
1028                         DELAY(300000);
1029                         /* make ctrlr happy: */
1030                         (void)fd_sense_int(fdc, 0, 0);
1031                 }
1032         }
1033
1034         for(i = 0; i < 2; i++) {
1035                 /*
1036                  * we must recalibrate twice, just in case the
1037                  * heads have been beyond cylinder 76, since most
1038                  * FDCs still barf when attempting to recalibrate
1039                  * more than 77 steps
1040                  */
1041                 /* go back to 0: */
1042                 if (fd_cmd(fdcu, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
1043                         /* a second being enough for full stroke seek*/
1044                         DELAY(i == 0? 1000000: 300000);
1045
1046                         /* anything responding? */
1047                         if (fd_sense_int(fdc, &st0, 0) == 0 &&
1048                                 (st0 & NE7_ST0_EC) == 0)
1049                                 break; /* already probed succesfully */
1050                 }
1051         }
1052
1053         set_motor(fdcu, fdsu, TURNOFF);
1054
1055         if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
1056                 return(0);
1057
1058         fd->track = FD_NO_TRACK;
1059         fd->fdc = fdc;
1060         fd->fdsu = fdsu;
1061         fd->options = 0;
1062         printf("fdc%d: 1.44MB 3.5in PCMCIA\n", fdcu);
1063         fd->type = FD_1440;
1064
1065 #ifdef DEVFS
1066         mynor = fdcu << 6;
1067         fd->bdevs[0] = devfs_add_devswf(&fd_cdevsw, mynor, DV_BLK,
1068                 UID_ROOT, GID_OPERATOR, 0640,
1069                 "fd%d", fdu);
1070         fd->cdevs[0] = devfs_add_devswf(&fd_cdevsw, mynor, DV_CHR,
1071                 UID_ROOT, GID_OPERATOR, 0640,
1072                 "rfd%d", fdu);
1073         /*
1074          * XXX this and the lookup in Fdopen() should be
1075          * data driven.
1076          */
1077         typemynor = mynor | FD_1440;
1078         typesize = fd_types[FD_1440 - 1].size / 2;
1079         /*
1080          * XXX all these conversions give bloated code and
1081          * confusing names.
1082          */
1083         if (typesize == 1476)
1084                 typesize = 1480;
1085         if (typesize == 1722)
1086                 typesize = 1720;
1087         fd->bdevs[FD_1440] = devfs_add_devswf(&fd_cdevsw, typemynor,
1088                 DV_BLK, UID_ROOT, GID_OPERATOR,
1089                 0640, "fd%d.%d", fdu, typesize);
1090         fd->cdevs[FD_1440] = devfs_add_devswf(&fd_cdevsw, typemynor,
1091                 DV_CHR, UID_ROOT, GID_OPERATOR,
1092                 0640,"rfd%d.%d", fdu, typesize);
1093         for (i = 0; i < MAXPARTITIONS; i++) {
1094                 fd->bdevs[1 + NUMDENS + i] = devfs_makelink(fd->bdevs[0],
1095                         "fd%d%c", fdu, 'a' + i);
1096                 fd->cdevs[1 + NUMDENS + i] = devfs_makelink(fd->cdevs[0],
1097                         "rfd%d%c", fdu, 'a' + i);
1098         }
1099 #endif /* DEVFS */
1100         return (1);
1101 }
1102 #endif
1103
1104 /****************************************************************************/
1105 /*                            motor control stuff                           */
1106 /*              remember to not deselect the drive we're working on         */
1107 /****************************************************************************/
1108 static void
1109 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1110 {
1111         int fdout = fdc->fdout;
1112         int needspecify = 0;
1113
1114         if(turnon) {
1115                 fdout &= ~FDO_FDSEL;
1116                 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1117         } else
1118                 fdout &= ~(FDO_MOEN0 << fdsu);
1119
1120         if(!turnon
1121            && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1122                 /* gonna turn off the last drive, put FDC to bed */
1123                 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1124         else {
1125                 /* make sure controller is selected and specified */
1126                 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1127                         needspecify = 1;
1128                 fdout |= (FDO_FRST|FDO_FDMAEN);
1129         }
1130
1131         outb(fdc->baseport+FDOUT, fdout);
1132         fdc->fdout = fdout;
1133         TRACE1("[0x%x->FDOUT]", fdout);
1134
1135         if (needspecify) {
1136                 /*
1137                  * XXX
1138                  * special case: since we have just woken up the FDC
1139                  * from its sleep, we silently assume the command will
1140                  * be accepted, and do not test for a timeout
1141                  */
1142                 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1143                              NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1144                              0);
1145                 if (fdc->flags & FDC_HAS_FIFO)
1146                         (void) enable_fifo(fdc);
1147         }
1148 }
1149
1150 static void
1151 fd_turnoff(void *xfd)
1152 {
1153         int     s;
1154         fd_p fd = xfd;
1155
1156         TRACE1("[fd%d: turnoff]", fd->fdu);
1157
1158         /*
1159          * Don't turn off the motor yet if the drive is active.
1160          * XXX shouldn't even schedule turnoff until drive is inactive
1161          * and nothing is queued on it.
1162          */
1163         if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1164                 fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz);
1165                 return;
1166         }
1167
1168         s = splbio();
1169         fd->flags &= ~FD_MOTOR;
1170         set_motor(fd->fdc, fd->fdsu, TURNOFF);
1171         splx(s);
1172 }
1173
1174 static void
1175 fd_motor_on(void *xfd)
1176 {
1177         int     s;
1178         fd_p fd = xfd;
1179
1180         s = splbio();
1181         fd->flags &= ~FD_MOTOR_WAIT;
1182         if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1183         {
1184                 fdc_intr(fd->fdc);
1185         }
1186         splx(s);
1187 }
1188
1189 static void
1190 fd_turnon(fd_p fd)
1191 {
1192         if(!(fd->flags & FD_MOTOR))
1193         {
1194                 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1195                 set_motor(fd->fdc, fd->fdsu, TURNON);
1196                 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */
1197         }
1198 }
1199
1200 static void
1201 fdc_reset(fdc_p fdc)
1202 {
1203         /* Try a reset, keep motor on */
1204         outb(fdc->baseport + FDOUT, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1205         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1206         DELAY(100);
1207         /* enable FDC, but defer interrupts a moment */
1208         outb(fdc->baseport + FDOUT, fdc->fdout & ~FDO_FDMAEN);
1209         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1210         DELAY(100);
1211         outb(fdc->baseport + FDOUT, fdc->fdout);
1212         TRACE1("[0x%x->FDOUT]", fdc->fdout);
1213
1214         /* XXX after a reset, silently believe the FDC will accept commands */
1215         (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1216                      NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1217                      0);
1218         if (fdc->flags & FDC_HAS_FIFO)
1219                 (void) enable_fifo(fdc);
1220 }
1221
1222 /****************************************************************************/
1223 /*                             fdc in/out                                   */
1224 /****************************************************************************/
1225 int
1226 in_fdc(struct fdc_data *fdc)
1227 {
1228         int baseport = fdc->baseport;
1229         int i, j = 100000;
1230         while ((i = inb(baseport+FDSTS) & (NE7_DIO|NE7_RQM))
1231                 != (NE7_DIO|NE7_RQM) && j-- > 0)
1232                 if (i == NE7_RQM)
1233                         return fdc_err(fdc, "ready for output in input\n");
1234         if (j <= 0)
1235                 return fdc_err(fdc, bootverbose? "input ready timeout\n": 0);
1236 #ifdef  FDC_DEBUG
1237         i = inb(baseport+FDDATA);
1238         TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1239         return(i);
1240 #else   /* !FDC_DEBUG */
1241         return inb(baseport+FDDATA);
1242 #endif  /* FDC_DEBUG */
1243 }
1244
1245 /*
1246  * fd_in: Like in_fdc, but allows you to see if it worked.
1247  */
1248 static int
1249 fd_in(struct fdc_data *fdc, int *ptr)
1250 {
1251         int baseport = fdc->baseport;
1252         int i, j = 100000;
1253         while ((i = inb(baseport+FDSTS) & (NE7_DIO|NE7_RQM))
1254                 != (NE7_DIO|NE7_RQM) && j-- > 0)
1255                 if (i == NE7_RQM)
1256                         return fdc_err(fdc, "ready for output in input\n");
1257         if (j <= 0)
1258                 return fdc_err(fdc, bootverbose? "input ready timeout\n": 0);
1259 #ifdef  FDC_DEBUG
1260         i = inb(baseport+FDDATA);
1261         TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1262         *ptr = i;
1263         return 0;
1264 #else   /* !FDC_DEBUG */
1265         i = inb(baseport+FDDATA);
1266         if (ptr)
1267                 *ptr = i;
1268         return 0;
1269 #endif  /* FDC_DEBUG */
1270 }
1271
1272 int
1273 out_fdc(struct fdc_data *fdc, int x)
1274 {
1275         int baseport = fdc->baseport;
1276         int i;
1277
1278         /* Check that the direction bit is set */
1279         i = 100000;
1280         while ((inb(baseport+FDSTS) & NE7_DIO) && i-- > 0);
1281         if (i <= 0) return fdc_err(fdc, "direction bit not set\n");
1282
1283         /* Check that the floppy controller is ready for a command */
1284         i = 100000;
1285         while ((inb(baseport+FDSTS) & NE7_RQM) == 0 && i-- > 0);
1286         if (i <= 0)
1287                 return fdc_err(fdc, bootverbose? "output ready timeout\n": 0);
1288
1289         /* Send the command and return */
1290         outb(baseport+FDDATA, x);
1291         TRACE1("[0x%x->FDDATA]", x);
1292         return (0);
1293 }
1294
1295 /****************************************************************************/
1296 /*                           fdopen/fdclose                                 */
1297 /****************************************************************************/
1298 int
1299 Fdopen(dev_t dev, int flags, int mode, struct proc *p)
1300 {
1301         fdu_t fdu = FDUNIT(minor(dev));
1302         int type = FDTYPE(minor(dev));
1303         fd_p    fd;
1304         fdc_p   fdc;
1305
1306         /* check bounds */
1307         if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1308                 return (ENXIO);
1309         fdc = fd->fdc;
1310         if ((fdc == NULL) || (fd->type == NO_TYPE))
1311                 return (ENXIO);
1312         if (type > NUMDENS)
1313                 return (ENXIO);
1314         if (type == 0)
1315                 type = fd->type;
1316         else {
1317                 /*
1318                  * For each type of basic drive, make sure we are trying
1319                  * to open a type it can do,
1320                  */
1321                 if (type != fd->type) {
1322                         switch (fd->type) {
1323                         case FD_360:
1324                                 return (ENXIO);
1325                         case FD_720:
1326                                 if (   type != FD_820
1327                                     && type != FD_800
1328                                    )
1329                                         return (ENXIO);
1330                                 break;
1331                         case FD_1200:
1332                                 switch (type) {
1333                                 case FD_1480:
1334                                         type = FD_1480in5_25;
1335                                         break;
1336                                 case FD_1440:
1337                                         type = FD_1440in5_25;
1338                                         break;
1339                                 case FD_820:
1340                                         type = FD_820in5_25;
1341                                         break;
1342                                 case FD_800:
1343                                         type = FD_800in5_25;
1344                                         break;
1345                                 case FD_720:
1346                                         type = FD_720in5_25;
1347                                         break;
1348                                 case FD_360:
1349                                         type = FD_360in5_25;
1350                                         break;
1351                                 default:
1352                                         return(ENXIO);
1353                                 }
1354                                 break;
1355                         case FD_1440:
1356                                 if (   type != FD_1720
1357                                     && type != FD_1480
1358                                     && type != FD_1200
1359                                     && type != FD_820
1360                                     && type != FD_800
1361                                     && type != FD_720
1362                                     )
1363                                         return(ENXIO);
1364                                 break;
1365                         }
1366                 }
1367         }
1368         fd->ft = fd_types + type - 1;
1369         fd->flags |= FD_OPEN;
1370         device_busy(fd->dev);
1371         device_busy(fd->fdc->fdc_dev);
1372         return 0;
1373 }
1374
1375 int
1376 fdclose(dev_t dev, int flags, int mode, struct proc *p)
1377 {
1378         fdu_t fdu = FDUNIT(minor(dev));
1379         struct fd_data *fd;
1380
1381         fd = devclass_get_softc(fd_devclass, fdu);
1382         fd->flags &= ~FD_OPEN;
1383         fd->options &= ~FDOPT_NORETRY;
1384
1385         return (0);
1386 }
1387
1388 /****************************************************************************/
1389 /*                               fdstrategy                                 */
1390 /****************************************************************************/
1391 void
1392 fdstrategy(struct buf *bp)
1393 {
1394         unsigned nblocks, blknum, cando;
1395         int     s;
1396         fdu_t   fdu;
1397         fdc_p   fdc;
1398         fd_p    fd;
1399         size_t  fdblk;
1400
1401         fdu = FDUNIT(minor(bp->b_dev));
1402         fd = devclass_get_softc(fd_devclass, fdu);
1403         if (fd == 0)
1404                 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1405                       (u_long)major(bp->b_dev), (u_long)minor(bp->b_dev));
1406         fdc = fd->fdc;
1407 #ifdef FDC_YE
1408         if (fd->type == NO_TYPE) {
1409                 bp->b_error = ENXIO;
1410                 bp->b_flags |= B_ERROR;
1411                 /*
1412                  * I _refuse_ to use a goto
1413                  */
1414                 biodone(bp);
1415                 return;
1416         };
1417 #endif
1418
1419         fdblk = 128 << (fd->ft->secsize);
1420         if (!(bp->b_flags & B_FORMAT)) {
1421                 if (bp->b_blkno < 0) {
1422                         printf(
1423                 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
1424                                fdu, (u_long)bp->b_blkno, bp->b_bcount);
1425                         bp->b_error = EINVAL;
1426                         bp->b_flags |= B_ERROR;
1427                         goto bad;
1428                 }
1429                 if ((bp->b_bcount % fdblk) != 0) {
1430                         bp->b_error = EINVAL;
1431                         bp->b_flags |= B_ERROR;
1432                         goto bad;
1433                 }
1434         }
1435
1436         /*
1437          * Set up block calculations.
1438          */
1439         if (bp->b_blkno > 20000000) {
1440                 /*
1441                  * Reject unreasonably high block number, prevent the
1442                  * multiplication below from overflowing.
1443                  */
1444                 bp->b_error = EINVAL;
1445                 bp->b_flags |= B_ERROR;
1446                 goto bad;
1447         }
1448         blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk;
1449         nblocks = fd->ft->size;
1450         bp->b_resid = 0;
1451         if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1452                 if (blknum <= nblocks) {
1453                         cando = (nblocks - blknum) * fdblk;
1454                         bp->b_resid = bp->b_bcount - cando;
1455                         if (cando == 0)
1456                                 goto bad;       /* not actually bad but EOF */
1457                 } else {
1458                         bp->b_error = EINVAL;
1459                         bp->b_flags |= B_ERROR;
1460                         goto bad;
1461                 }
1462         }
1463         bp->b_pblkno = bp->b_blkno;
1464         s = splbio();
1465         bufqdisksort(&fdc->head, bp);
1466         untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */
1467
1468         /* Tell devstat we are starting on the transaction */
1469         devstat_start_transaction(&fd->device_stats);
1470
1471         fdstart(fdc);
1472         splx(s);
1473         return;
1474
1475 bad:
1476         biodone(bp);
1477 }
1478
1479 /***************************************************************\
1480 *                               fdstart                         *
1481 * We have just queued something.. if the controller is not busy *
1482 * then simulate the case where it has just finished a command   *
1483 * So that it (the interrupt routine) looks on the queue for more*
1484 * work to do and picks up what we just added.                   *
1485 * If the controller is already busy, we need do nothing, as it  *
1486 * will pick up our work when the present work completes         *
1487 \***************************************************************/
1488 static void
1489 fdstart(struct fdc_data *fdc)
1490 {
1491         int s;
1492
1493         s = splbio();
1494         if(fdc->state == DEVIDLE)
1495         {
1496                 fdc_intr(fdc);
1497         }
1498         splx(s);
1499 }
1500
1501 static void
1502 fd_iotimeout(void *xfdc)
1503 {
1504         fdc_p fdc;
1505         int s;
1506
1507         fdc = xfdc;
1508         TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1509
1510         /*
1511          * Due to IBM's brain-dead design, the FDC has a faked ready
1512          * signal, hardwired to ready == true. Thus, any command
1513          * issued if there's no diskette in the drive will _never_
1514          * complete, and must be aborted by resetting the FDC.
1515          * Many thanks, Big Blue!
1516          * The FDC must not be reset directly, since that would
1517          * interfere with the state machine.  Instead, pretend that
1518          * the command completed but was invalid.  The state machine
1519          * will reset the FDC and retry once.
1520          */
1521         s = splbio();
1522         fdc->status[0] = NE7_ST0_IC_IV;
1523         fdc->flags &= ~FDC_STAT_VALID;
1524         fdc->state = IOTIMEDOUT;
1525         fdc_intr(fdc);
1526         splx(s);
1527 }
1528
1529 /* just ensure it has the right spl */
1530 static void
1531 fd_pseudointr(void *xfdc)
1532 {
1533         int     s;
1534
1535         s = splbio();
1536         fdc_intr(xfdc);
1537         splx(s);
1538 }
1539
1540 /***********************************************************************\
1541 *                                 fdintr                                *
1542 * keep calling the state machine until it returns a 0                   *
1543 * ALWAYS called at SPLBIO                                               *
1544 \***********************************************************************/
1545 static void
1546 fdc_intr(void *xfdc)
1547 {
1548         fdc_p fdc = xfdc;
1549         while(fdstate(fdc))
1550                 ;
1551 }
1552
1553 #ifdef FDC_YE
1554 /*
1555  * magic pseudo-DMA initialization for YE FDC. Sets count and
1556  * direction
1557  */
1558 #define SET_BCDR(wr,cnt,port) outb(port,(((cnt)-1) & 0xff)); \
1559         outb(port+1,((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)))
1560
1561 /*
1562  * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1563  */
1564 static int fdcpio(fdcu_t fdcu, long flags, caddr_t addr, u_int count)
1565 {
1566         u_char *cptr = (u_char *)addr;
1567         fdc_p fdc = &fdc_data[fdcu];
1568         int io = fdc->baseport;
1569
1570         if (flags & B_READ) {
1571                 if (fdc->state != PIOREAD) {
1572                         fdc->state = PIOREAD;
1573                         return(0);
1574                 };
1575                 SET_BCDR(0,count,io);
1576                 insb(io+FDC_YE_DATAPORT,cptr,count);
1577         } else {
1578                 outsb(io+FDC_YE_DATAPORT,cptr,count);
1579                 SET_BCDR(0,count,io);
1580         };
1581         return(1);
1582 }
1583 #endif /* FDC_YE */
1584
1585 /***********************************************************************\
1586 * The controller state machine.                                         *
1587 * if it returns a non zero value, it should be called again immediatly  *
1588 \***********************************************************************/
1589 static int
1590 fdstate(fdc_p fdc)
1591 {
1592         int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1593         unsigned blknum = 0, b_cylinder = 0;
1594         fdu_t fdu = fdc->fdu;
1595         fd_p fd;
1596         register struct buf *bp;
1597         struct fd_formb *finfo = NULL;
1598         size_t fdblk;
1599
1600         bp = fdc->bp;
1601         if (bp == NULL) {
1602                 bp = bufq_first(&fdc->head);
1603                 if (bp != NULL) {
1604                         bufq_remove(&fdc->head, bp);
1605                         fdc->bp = bp;
1606                 }
1607         }
1608         if (bp == NULL) {
1609                 /***********************************************\
1610                 * nothing left for this controller to do        *
1611                 * Force into the IDLE state,                    *
1612                 \***********************************************/
1613                 fdc->state = DEVIDLE;
1614                 if (fdc->fd) {
1615                         device_print_prettyname(fdc->fdc_dev);
1616                         printf("unexpected valid fd pointer\n");
1617                         fdc->fd = (fd_p) 0;
1618                         fdc->fdu = -1;
1619                 }
1620                 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1621                 return (0);
1622         }
1623         fdu = FDUNIT(minor(bp->b_dev));
1624         fd = devclass_get_softc(fd_devclass, fdu);
1625         fdblk = 128 << fd->ft->secsize;
1626         if (fdc->fd && (fd != fdc->fd)) {
1627                 device_print_prettyname(fd->dev);
1628                 printf("confused fd pointers\n");
1629         }
1630         read = bp->b_flags & B_READ;
1631         format = bp->b_flags & B_FORMAT;
1632         if (format) {
1633                 finfo = (struct fd_formb *)bp->b_data;
1634                 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1635                         - (char *)finfo;
1636         }
1637         if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1638                 blknum = (unsigned) bp->b_pblkno * DEV_BSIZE/fdblk +
1639                         fd->skip/fdblk;
1640                 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1641         }
1642         TRACE1("fd%d", fdu);
1643         TRACE1("[%s]", fdstates[fdc->state]);
1644         TRACE1("(0x%x)", fd->flags);
1645         untimeout(fd_turnoff, fd, fd->toffhandle);
1646         fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz);
1647         switch (fdc->state)
1648         {
1649         case DEVIDLE:
1650         case FINDWORK:  /* we have found new work */
1651                 fdc->retry = 0;
1652                 fd->skip = 0;
1653                 fdc->fd = fd;
1654                 fdc->fdu = fdu;
1655                 outb(fdc->baseport+FDCTL, fd->ft->trans);
1656                 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1657                 /*******************************************************\
1658                 * If the next drive has a motor startup pending, then   *
1659                 * it will start up in its own good time         *
1660                 \*******************************************************/
1661                 if(fd->flags & FD_MOTOR_WAIT) {
1662                         fdc->state = MOTORWAIT;
1663                         return (0); /* come back later */
1664                 }
1665                 /*******************************************************\
1666                 * Maybe if it's not starting, it SHOULD be starting     *
1667                 \*******************************************************/
1668                 if (!(fd->flags & FD_MOTOR))
1669                 {
1670                         fdc->state = MOTORWAIT;
1671                         fd_turnon(fd);
1672                         return (0);
1673                 }
1674                 else    /* at least make sure we are selected */
1675                 {
1676                         set_motor(fdc, fd->fdsu, TURNON);
1677                 }
1678                 if (fdc->flags & FDC_NEEDS_RESET) {
1679                         fdc->state = RESETCTLR;
1680                         fdc->flags &= ~FDC_NEEDS_RESET;
1681                 } else
1682                         fdc->state = DOSEEK;
1683                 break;
1684         case DOSEEK:
1685                 if (b_cylinder == (unsigned)fd->track)
1686                 {
1687                         fdc->state = SEEKCOMPLETE;
1688                         break;
1689                 }
1690                 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1691                            fd->fdsu, b_cylinder * fd->ft->steptrac,
1692                            0))
1693                 {
1694                         /*
1695                          * seek command not accepted, looks like
1696                          * the FDC went off to the Saints...
1697                          */
1698                         fdc->retry = 6; /* try a reset */
1699                         return(retrier(fdc));
1700                 }
1701                 fd->track = FD_NO_TRACK;
1702                 fdc->state = SEEKWAIT;
1703                 return(0);      /* will return later */
1704         case SEEKWAIT:
1705                 /* allow heads to settle */
1706                 timeout(fd_pseudointr, fdc, hz / 16);
1707                 fdc->state = SEEKCOMPLETE;
1708                 return(0);      /* will return later */
1709         case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1710                 /* Make sure seek really happened*/
1711                 if(fd->track == FD_NO_TRACK) {
1712                         int descyl = b_cylinder * fd->ft->steptrac;
1713                         do {
1714                                 /*
1715                                  * This might be a "ready changed" interrupt,
1716                                  * which cannot really happen since the
1717                                  * RDY pin is hardwired to + 5 volts.  This
1718                                  * generally indicates a "bouncing" intr
1719                                  * line, so do one of the following:
1720                                  *
1721                                  * When running on an enhanced FDC that is
1722                                  * known to not go stuck after responding
1723                                  * with INVALID, fetch all interrupt states
1724                                  * until seeing either an INVALID or a
1725                                  * real interrupt condition.
1726                                  *
1727                                  * When running on a dumb old NE765, give
1728                                  * up immediately.  The controller will
1729                                  * provide up to four dummy RC interrupt
1730                                  * conditions right after reset (for the
1731                                  * corresponding four drives), so this is
1732                                  * our only chance to get notice that it
1733                                  * was not the FDC that caused the interrupt.
1734                                  */
1735                                 if (fd_sense_int(fdc, &st0, &cyl)
1736                                     == FD_NOT_VALID)
1737                                         return 0;
1738                                 if(fdc->fdct == FDC_NE765
1739                                    && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1740                                         return 0; /* hope for a real intr */
1741                         } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1742
1743                         if (0 == descyl) {
1744                                 int failed = 0;
1745                                 /*
1746                                  * seek to cyl 0 requested; make sure we are
1747                                  * really there
1748                                  */
1749                                 if (fd_sense_drive_status(fdc, &st3))
1750                                         failed = 1;
1751                                 if ((st3 & NE7_ST3_T0) == 0) {
1752                                         printf(
1753                 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1754                                                fdu, st3, NE7_ST3BITS);
1755                                         failed = 1;
1756                                 }
1757
1758                                 if (failed) {
1759                                         if(fdc->retry < 3)
1760                                                 fdc->retry = 3;
1761                                         return (retrier(fdc));
1762                                 }
1763                         }
1764
1765                         if (cyl != descyl) {
1766                                 printf(
1767                 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1768                                        fdu, descyl, cyl, st0);
1769                                 if (fdc->retry < 3)
1770                                         fdc->retry = 3;
1771                                 return (retrier(fdc));
1772                         }
1773                 }
1774
1775                 fd->track = b_cylinder;
1776 #ifdef FDC_YE
1777                 if (!(fdc->flags & FDC_PCMCIA))
1778 #endif
1779                         isa_dmastart(bp->b_flags, bp->b_data+fd->skip,
1780                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
1781                 sectrac = fd->ft->sectrac;
1782                 sec = blknum %  (sectrac * fd->ft->heads);
1783                 head = sec / sectrac;
1784                 sec = sec % sectrac + 1;
1785                 fd->hddrv = ((head&1)<<2)+fdu;
1786
1787                 if(format || !read)
1788                 {
1789                         /* make sure the drive is writable */
1790                         if(fd_sense_drive_status(fdc, &st3) != 0)
1791                         {
1792                                 /* stuck controller? */
1793                                 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1794                                             format ? bp->b_bcount : fdblk,
1795                                             fdc->dmachan);
1796                                 fdc->retry = 6; /* reset the beast */
1797                                 return (retrier(fdc));
1798                         }
1799                         if(st3 & NE7_ST3_WP)
1800                         {
1801                                 /*
1802                                  * XXX YES! this is ugly.
1803                                  * in order to force the current operation
1804                                  * to fail, we will have to fake an FDC
1805                                  * error - all error handling is done
1806                                  * by the retrier()
1807                                  */
1808                                 fdc->status[0] = NE7_ST0_IC_AT;
1809                                 fdc->status[1] = NE7_ST1_NW;
1810                                 fdc->status[2] = 0;
1811                                 fdc->status[3] = fd->track;
1812                                 fdc->status[4] = head;
1813                                 fdc->status[5] = sec;
1814                                 fdc->retry = 8; /* break out immediately */
1815                                 fdc->state = IOTIMEDOUT; /* not really... */
1816                                 return (1);
1817                         }
1818                 }
1819
1820                 if (format) {
1821 #ifdef FDC_YE
1822                         if (fdc->flags & FDC_PCMCIA)
1823                                 (void)fdcpio(fdcu,bp->b_flags,
1824                                         bp->b_data+fd->skip,
1825                                         bp->b_bcount);
1826 #endif
1827                         /* formatting */
1828                         if(fd_cmd(fdc, 6,  NE7CMD_FORMAT, head << 2 | fdu,
1829                                   finfo->fd_formb_secshift,
1830                                   finfo->fd_formb_nsecs,
1831                                   finfo->fd_formb_gaplen,
1832                                   finfo->fd_formb_fillbyte, 0)) {
1833                                 /* controller fell over */
1834                                 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1835                                             format ? bp->b_bcount : fdblk,
1836                                             fdc->dmachan);
1837                                 fdc->retry = 6;
1838                                 return (retrier(fdc));
1839                         }
1840                 } else {
1841 #ifdef FDC_YE
1842                         if (fdc->flags & FDC_PCMCIA) {
1843                                 /*
1844                                  * this seems to be necessary even when
1845                                  * reading data
1846                                  */
1847                                 SET_BCDR(1,fdblk,fdc->baseport);
1848
1849                                 /*
1850                                  * perform the write pseudo-DMA before
1851                                  * the WRITE command is sent
1852                                  */
1853                                 if (!read)
1854                                         (void)fdcpio(fdcu,bp->b_flags,
1855                                             bp->b_data+fd->skip,
1856                                             fdblk);
1857                         }
1858 #endif
1859                         if (fd_cmd(fdc, 9,
1860                                    (read ? NE7CMD_READ : NE7CMD_WRITE),
1861                                    head << 2 | fdu,  /* head & unit */
1862                                    fd->track,        /* track */
1863                                    head,
1864                                    sec,              /* sector + 1 */
1865                                    fd->ft->secsize,  /* sector size */
1866                                    sectrac,          /* sectors/track */
1867                                    fd->ft->gap,      /* gap size */
1868                                    fd->ft->datalen,  /* data length */
1869                                    0)) {
1870                                 /* the beast is sleeping again */
1871                                 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1872                                             format ? bp->b_bcount : fdblk,
1873                                             fdc->dmachan);
1874                                 fdc->retry = 6;
1875                                 return (retrier(fdc));
1876                         }
1877                 }
1878 #ifdef FDC_YE
1879                 if (fdc->flags & FDC_PCMCIA)
1880                         /*
1881                          * if this is a read, then simply await interrupt
1882                          * before performing PIO
1883                          */
1884                         if (read && !fdcpio(fdcu,bp->b_flags,
1885                             bp->b_data+fd->skip,fdblk)) {
1886                                 fd->tohandle = timeout(fd_iotimeout,
1887                                         (caddr_t)fdcu, hz);
1888                                 return(0);      /* will return later */
1889                         };
1890
1891                 /*
1892                  * write (or format) operation will fall through and
1893                  * await completion interrupt
1894                  */
1895 #endif
1896                 fdc->state = IOCOMPLETE;
1897                 fd->tohandle = timeout(fd_iotimeout, fdc, hz);
1898                 return (0);     /* will return later */
1899 #ifdef FDC_YE
1900         case PIOREAD:
1901                 /*
1902                  * actually perform the PIO read.  The IOCOMPLETE case
1903                  * removes the timeout for us.
1904                  */
1905                 (void)fdcpio(fdcu,bp->b_flags,bp->b_data+fd->skip,fdblk);
1906                 fdc->state = IOCOMPLETE;
1907                 /* FALLTHROUGH */
1908 #endif
1909         case IOCOMPLETE: /* IO DONE, post-analyze */
1910                 untimeout(fd_iotimeout, fdc, fd->tohandle);
1911
1912                 if (fd_read_status(fdc, fd->fdsu)) {
1913                         isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1914                                     format ? bp->b_bcount : fdblk,
1915                                     fdc->dmachan);
1916                         if (fdc->retry < 6)
1917                                 fdc->retry = 6; /* force a reset */
1918                         return (retrier(fdc));
1919                 }
1920
1921                 fdc->state = IOTIMEDOUT;
1922
1923                 /* FALLTHROUGH */
1924
1925         case IOTIMEDOUT:
1926 #ifdef FDC_YE
1927                 if (!(fdc->flags & FDC_PCMCIA))
1928 #endif
1929                         isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1930                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
1931                 if (fdc->status[0] & NE7_ST0_IC) {
1932                         if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1933                             && fdc->status[1] & NE7_ST1_OR) {
1934                                 /*
1935                                  * DMA overrun. Someone hogged the bus
1936                                  * and didn't release it in time for the
1937                                  * next FDC transfer.
1938                                  * Just restart it, don't increment retry
1939                                  * count. (vak)
1940                                  */
1941                                 fdc->state = SEEKCOMPLETE;
1942                                 return (1);
1943                         }
1944                         else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
1945                                 && fdc->retry < 6)
1946                                 fdc->retry = 6; /* force a reset */
1947                         else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1948                                 && fdc->status[2] & NE7_ST2_WC
1949                                 && fdc->retry < 3)
1950                                 fdc->retry = 3; /* force recalibrate */
1951                         return (retrier(fdc));
1952                 }
1953                 /* All OK */
1954                 fd->skip += fdblk;
1955                 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
1956                         /* set up next transfer */
1957                         fdc->state = DOSEEK;
1958                 } else {
1959                         /* ALL DONE */
1960                         fd->skip = 0;
1961                         fdc->bp = NULL;
1962                         /* Tell devstat we have finished with the transaction */
1963                         devstat_end_transaction(&fd->device_stats,
1964                                                 bp->b_bcount - bp->b_resid,
1965                                                 DEVSTAT_TAG_NONE,
1966                                                 (bp->b_flags & B_READ) ?
1967                                                 DEVSTAT_READ : DEVSTAT_WRITE);
1968                         biodone(bp);
1969                         fdc->fd = (fd_p) 0;
1970                         fdc->fdu = -1;
1971                         fdc->state = FINDWORK;
1972                 }
1973                 return (1);
1974         case RESETCTLR:
1975                 fdc_reset(fdc);
1976                 fdc->retry++;
1977                 fdc->state = RESETCOMPLETE;
1978                 return (0);
1979         case RESETCOMPLETE:
1980                 /*
1981                  * Discard all the results from the reset so that they
1982                  * can't cause an unexpected interrupt later.
1983                  */
1984                 for (i = 0; i < 4; i++)
1985                         (void)fd_sense_int(fdc, &st0, &cyl);
1986                 fdc->state = STARTRECAL;
1987                 /* Fall through. */
1988         case STARTRECAL:
1989                 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
1990                         /* arrgl */
1991                         fdc->retry = 6;
1992                         return (retrier(fdc));
1993                 }
1994                 fdc->state = RECALWAIT;
1995                 return (0);     /* will return later */
1996         case RECALWAIT:
1997                 /* allow heads to settle */
1998                 timeout(fd_pseudointr, fdc, hz / 8);
1999                 fdc->state = RECALCOMPLETE;
2000                 return (0);     /* will return later */
2001         case RECALCOMPLETE:
2002                 do {
2003                         /*
2004                          * See SEEKCOMPLETE for a comment on this:
2005                          */
2006                         if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2007                                 return 0;
2008                         if(fdc->fdct == FDC_NE765
2009                            && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2010                                 return 0; /* hope for a real intr */
2011                 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2012                 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2013                 {
2014                         if(fdc->retry > 3)
2015                                 /*
2016                                  * a recalibrate from beyond cylinder 77
2017                                  * will "fail" due to the FDC limitations;
2018                                  * since people used to complain much about
2019                                  * the failure message, try not logging
2020                                  * this one if it seems to be the first
2021                                  * time in a line
2022                                  */
2023                                 printf("fd%d: recal failed ST0 %b cyl %d\n",
2024                                        fdu, st0, NE7_ST0BITS, cyl);
2025                         if(fdc->retry < 3) fdc->retry = 3;
2026                         return (retrier(fdc));
2027                 }
2028                 fd->track = 0;
2029                 /* Seek (probably) necessary */
2030                 fdc->state = DOSEEK;
2031                 return (1);     /* will return immediatly */
2032         case MOTORWAIT:
2033                 if(fd->flags & FD_MOTOR_WAIT)
2034                 {
2035                         return (0); /* time's not up yet */
2036                 }
2037                 if (fdc->flags & FDC_NEEDS_RESET) {
2038                         fdc->state = RESETCTLR;
2039                         fdc->flags &= ~FDC_NEEDS_RESET;
2040                 } else {
2041                         /*
2042                          * If all motors were off, then the controller was
2043                          * reset, so it has lost track of the current
2044                          * cylinder.  Recalibrate to handle this case.
2045                          * But first, discard the results of the reset.
2046                          */
2047                         fdc->state = RESETCOMPLETE;
2048                 }
2049                 return (1);     /* will return immediatly */
2050         default:
2051                 device_print_prettyname(fdc->fdc_dev);
2052                 printf("unexpected FD int->");
2053                 if (fd_read_status(fdc, fd->fdsu) == 0)
2054                         printf("FDC status :%x %x %x %x %x %x %x   ",
2055                                fdc->status[0],
2056                                fdc->status[1],
2057                                fdc->status[2],
2058                                fdc->status[3],
2059                                fdc->status[4],
2060                                fdc->status[5],
2061                                fdc->status[6] );
2062                 else
2063                         printf("No status available   ");
2064                 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2065                 {
2066                         printf("[controller is dead now]\n");
2067                         return (0);
2068                 }
2069                 printf("ST0 = %x, PCN = %x\n", st0, cyl);
2070                 return (0);
2071         }
2072         /*XXX confusing: some branches return immediately, others end up here*/
2073         return (1); /* Come back immediatly to new state */
2074 }
2075
2076 static int
2077 retrier(struct fdc_data *fdc)
2078 {
2079         register struct buf *bp;
2080         struct fd_data *fd;
2081         int fdu;
2082
2083         bp = fdc->bp;
2084
2085         /* XXX shouldn't this be cached somewhere?  */
2086         fdu = FDUNIT(minor(bp->b_dev));
2087         fd = devclass_get_softc(fd_devclass, fdu);
2088         if (fd->options & FDOPT_NORETRY)
2089                 goto fail;
2090
2091         switch (fdc->retry) {
2092         case 0: case 1: case 2:
2093                 fdc->state = SEEKCOMPLETE;
2094                 break;
2095         case 3: case 4: case 5:
2096                 fdc->state = STARTRECAL;
2097                 break;
2098         case 6:
2099                 fdc->state = RESETCTLR;
2100                 break;
2101         case 7:
2102                 break;
2103         default:
2104         fail:
2105                 {
2106                         dev_t sav_b_dev = bp->b_dev;
2107                         /* Trick diskerr */
2108                         bp->b_dev = makedev(major(bp->b_dev),
2109                                     (FDUNIT(minor(bp->b_dev))<<3)|RAW_PART);
2110                         diskerr(bp, "fd", "hard error", LOG_PRINTF,
2111                                 fdc->fd->skip / DEV_BSIZE,
2112                                 (struct disklabel *)NULL);
2113                         bp->b_dev = sav_b_dev;
2114                         if (fdc->flags & FDC_STAT_VALID)
2115                         {
2116                                 printf(
2117                         " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2118                                        fdc->status[0], NE7_ST0BITS,
2119                                        fdc->status[1], NE7_ST1BITS,
2120                                        fdc->status[2], NE7_ST2BITS,
2121                                        fdc->status[3], fdc->status[4],
2122                                        fdc->status[5]);
2123                         }
2124                         else
2125                                 printf(" (No status)\n");
2126                 }
2127                 bp->b_flags |= B_ERROR;
2128                 bp->b_error = EIO;
2129                 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2130                 fdc->bp = NULL;
2131
2132                 /* Tell devstat we have finished with the transaction */
2133                 devstat_end_transaction(&fdc->fd->device_stats,
2134                                         bp->b_bcount - bp->b_resid,
2135                                         DEVSTAT_TAG_NONE,
2136                                         (bp->b_flags & B_READ) ? DEVSTAT_READ :
2137                                                                  DEVSTAT_WRITE);
2138                 fdc->fd->skip = 0;
2139                 biodone(bp);
2140                 fdc->state = FINDWORK;
2141                 fdc->flags |= FDC_NEEDS_RESET;
2142                 fdc->fd = (fd_p) 0;
2143                 fdc->fdu = -1;
2144                 return (1);
2145         }
2146         fdc->retry++;
2147         return (1);
2148 }
2149
2150 static int
2151 fdformat(dev, finfo, p)
2152         dev_t dev;
2153         struct fd_formb *finfo;
2154         struct proc *p;
2155 {
2156         fdu_t   fdu;
2157         fd_p    fd;
2158
2159         struct buf *bp;
2160         int rv = 0, s;
2161         size_t fdblk;
2162
2163         fdu     = FDUNIT(minor(dev));
2164         fd      = devclass_get_softc(fd_devclass, fdu);
2165         fdblk = 128 << fd->ft->secsize;
2166
2167         /* set up a buffer header for fdstrategy() */
2168         bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT);
2169         if(bp == 0)
2170                 return ENOBUFS;
2171         /*
2172          * keep the process from being swapped
2173          */
2174         PHOLD(p);
2175         bzero((void *)bp, sizeof(struct buf));
2176         bp->b_flags = B_BUSY | B_PHYS | B_FORMAT;
2177
2178         /*
2179          * calculate a fake blkno, so fdstrategy() would initiate a
2180          * seek to the requested cylinder
2181          */
2182         bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
2183                 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
2184
2185         bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2186         bp->b_data = (caddr_t)finfo;
2187
2188         /* now do the format */
2189         bp->b_dev = dev;
2190         fdstrategy(bp);
2191
2192         /* ...and wait for it to complete */
2193         s = splbio();
2194         while(!(bp->b_flags & B_DONE)) {
2195                 rv = tsleep((caddr_t)bp, PRIBIO, "fdform", 20 * hz);
2196                 if (rv == EWOULDBLOCK)
2197                         break;
2198         }
2199         splx(s);
2200
2201         if (rv == EWOULDBLOCK) {
2202                 /* timed out */
2203                 rv = EIO;
2204                 biodone(bp);
2205         }
2206         if (bp->b_flags & B_ERROR)
2207                 rv = bp->b_error;
2208         /*
2209          * allow the process to be swapped
2210          */
2211         PRELE(p);
2212         free(bp, M_TEMP);
2213         return rv;
2214 }
2215
2216 /*
2217  * TODO: don't allocate buffer on stack.
2218  */
2219
2220 static int
2221 fdioctl(dev, cmd, addr, flag, p)
2222         dev_t dev;
2223         u_long cmd;
2224         caddr_t addr;
2225         int flag;
2226         struct proc *p;
2227 {
2228         fdu_t   fdu = FDUNIT(minor(dev));
2229         fd_p    fd = devclass_get_softc(fd_devclass, fdu);
2230         size_t fdblk;
2231
2232         struct fd_type *fdt;
2233         struct disklabel *dl;
2234         char buffer[DEV_BSIZE];
2235         int error = 0;
2236
2237         fdblk = 128 << fd->ft->secsize;
2238
2239         switch (cmd) {
2240         case DIOCGDINFO:
2241                 bzero(buffer, sizeof (buffer));
2242                 dl = (struct disklabel *)buffer;
2243                 dl->d_secsize = fdblk;
2244                 fdt = fd->ft;
2245                 dl->d_secpercyl = fdt->size / fdt->tracks;
2246                 dl->d_type = DTYPE_FLOPPY;
2247
2248                 if (readdisklabel(dkmodpart(dev, RAW_PART), fdstrategy, dl)
2249                     == NULL)
2250                         error = 0;
2251                 else
2252                         error = EINVAL;
2253
2254                 *(struct disklabel *)addr = *dl;
2255                 break;
2256
2257         case DIOCSDINFO:
2258                 if ((flag & FWRITE) == 0)
2259                         error = EBADF;
2260                 break;
2261
2262         case DIOCWLABEL:
2263                 if ((flag & FWRITE) == 0)
2264                         error = EBADF;
2265                 break;
2266
2267         case DIOCWDINFO:
2268                 if ((flag & FWRITE) == 0) {
2269                         error = EBADF;
2270                         break;
2271                 }
2272
2273                 dl = (struct disklabel *)addr;
2274
2275                 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2276                                           (u_long)0)) != 0)
2277                         break;
2278
2279                 error = writedisklabel(dev, fdstrategy,
2280                                        (struct disklabel *)buffer);
2281                 break;
2282         case FD_FORM:
2283                 if ((flag & FWRITE) == 0)
2284                         error = EBADF;  /* must be opened for writing */
2285                 else if (((struct fd_formb *)addr)->format_version !=
2286                         FD_FORMAT_VERSION)
2287                         error = EINVAL; /* wrong version of formatting prog */
2288                 else
2289                         error = fdformat(dev, (struct fd_formb *)addr, p);
2290                 break;
2291
2292         case FD_GTYPE:                  /* get drive type */
2293                 *(struct fd_type *)addr = *fd->ft;
2294                 break;
2295
2296         case FD_STYPE:                  /* set drive type */
2297                 /* this is considered harmful; only allow for superuser */
2298                 if (suser(p) != 0)
2299                         return EPERM;
2300                 *fd->ft = *(struct fd_type *)addr;
2301                 break;
2302
2303         case FD_GOPTS:                  /* get drive options */
2304                 *(int *)addr = fd->options;
2305                 break;
2306
2307         case FD_SOPTS:                  /* set drive options */
2308                 fd->options = *(int *)addr;
2309                 break;
2310
2311         default:
2312                 error = ENOTTY;
2313                 break;
2314         }
2315         return (error);
2316 }
2317
2318 static device_method_t fdc_methods[] = {
2319         /* Device interface */
2320         DEVMETHOD(device_probe,         fdc_probe),
2321         DEVMETHOD(device_attach,        fdc_attach),
2322         DEVMETHOD(device_detach,        bus_generic_detach),
2323         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
2324         DEVMETHOD(device_suspend,       bus_generic_suspend),
2325         DEVMETHOD(device_resume,        bus_generic_resume),
2326
2327         /* Bus interface */
2328         DEVMETHOD(bus_print_child,      fdc_print_child),
2329         /* Our children never use any other bus interface methods. */
2330
2331         { 0, 0 }
2332 };
2333
2334 static driver_t fdc_driver = {
2335         "fdc",
2336         fdc_methods,
2337         sizeof(struct fdc_data)
2338 };
2339
2340 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
2341
2342 static device_method_t fd_methods[] = {
2343         /* Device interface */
2344         DEVMETHOD(device_probe,         fd_probe),
2345         DEVMETHOD(device_attach,        fd_attach),
2346         DEVMETHOD(device_detach,        bus_generic_detach),
2347         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
2348         DEVMETHOD(device_suspend,       bus_generic_suspend), /* XXX */
2349         DEVMETHOD(device_resume,        bus_generic_resume), /* XXX */
2350
2351         { 0, 0 }
2352 };
2353
2354 static driver_t fd_driver = {
2355         "fd",
2356         fd_methods,
2357         sizeof(struct fd_data)
2358 };
2359
2360 DEV_DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, CDEV_MAJOR, BDEV_MAJOR,
2361                    fd_cdevsw, 0, 0);
2362
2363 #endif /* NFDC > 0 */
2364
2365 /*
2366  * Hello emacs, these are the
2367  * Local Variables:
2368  *  c-indent-level:               8
2369  *  c-continued-statement-offset: 8
2370  *  c-continued-brace-offset:     0
2371  *  c-brace-offset:              -8
2372  *  c-brace-imaginary-offset:     0
2373  *  c-argdecl-indent:             8
2374  *  c-label-offset:              -8
2375  *  c++-hanging-braces:           1
2376  *  c++-access-specifier-offset: -8
2377  *  c++-empty-arglist-indent:     8
2378  *  c++-friend-offset:            0
2379  * End:
2380  */