sys/dev/disk/fd/fd.c

   1 /*
   2  * Copyright (c) 1990 The Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Don Ahn.
   7  *
   8  * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu)
   9  * aided by the Linux floppy driver modifications from David Bateman
  10  * (dbateman@eng.uts.edu.au).
  11  *
  12  * Copyright (c) 1993, 1994 by
  13  *  jc@irbs.UUCP (John Capo)
  14  *  vak@zebub.msk.su (Serge Vakulenko)
  15  *  ache@astral.msk.su (Andrew A. Chernov)
  16  *
  17  * Copyright (c) 1993, 1994, 1995 by
  18  *  joerg_wunsch@uriah.sax.de (Joerg Wunsch)
  19  *  dufault@hda.com (Peter Dufault)
  20  *
  21  * Copyright (c) 2001 Joerg Wunsch,
  22  *  joerg_wunsch@uriah.sax.de (Joerg Wunsch)
  23  *
  24  * Redistribution and use in source and binary forms, with or without
  25  * modification, are permitted provided that the following conditions
  26  * are met:
  27  * 1. Redistributions of source code must retain the above copyright
  28  *    notice, this list of conditions and the following disclaimer.
  29  * 2. Redistributions in binary form must reproduce the above copyright
  30  *    notice, this list of conditions and the following disclaimer in the
  31  *    documentation and/or other materials provided with the distribution.
  32  * 3. All advertising materials mentioning features or use of this software
  33  *    must display the following acknowledgement:
  34  *      This product includes software developed by the University of
  35  *      California, Berkeley and its contributors.
  36  * 4. Neither the name of the University nor the names of its contributors
  37  *    may be used to endorse or promote products derived from this software
  38  *    without specific prior written permission.
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  *      from:   @(#)fd.c        7.4 (Berkeley) 5/25/91
  53  * $FreeBSD: src/sys/isa/fd.c,v 1.176.2.8 2002/05/15 21:56:14 joerg Exp $
  54  * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.19 2004/09/19 00:36:37 joerg Exp $
  55  *
  56  */
  57
  58 #include "opt_fdc.h"
  59 #include "use_pccard.h"
  60
  61 #include <sys/param.h>
  62 #include <sys/systm.h>
  63 #include <sys/bootmaj.h>
  64 #include <sys/kernel.h>
  65 #include <sys/buf.h>
  66 #include <sys/bus.h>
  67 #include <sys/conf.h>
  68 #include <sys/disklabel.h>
  69 #include <sys/devicestat.h>
  70 #include <sys/fcntl.h>
  71 #include <sys/malloc.h>
  72 #include <sys/module.h>
  73 #include <sys/proc.h>
  74 #include <sys/syslog.h>
  75 #include <sys/device.h>
  76
  77 #include <sys/bus.h>
  78 #include <machine/bus.h>
  79 #include <sys/rman.h>
  80
  81 #include <sys/buf2.h>
  82
  83 #include <machine/clock.h>
  84 #include <machine/ioctl_fd.h>
  85 #include <machine/resource.h>
  86 #include <machine/stdarg.h>
  87
  88 #include <bus/isa/isavar.h>
  89 #include <bus/isa/isareg.h>
  90 #include "fdreg.h"
  91 #include "fdc.h"
  92 #include <bus/isa/rtc.h>
  93
  94 /* misuse a flag to identify format operation */
  95 #define B_FORMAT B_XXX
  96
  97 /* configuration flags */
  98 #define FDC_PRETEND_D0  (1 << 0)        /* pretend drive 0 to be there */
  99 #define FDC_NO_FIFO     (1 << 2)        /* do not enable FIFO  */
 100
 101 /* internally used only, not really from CMOS: */
 102 #define RTCFDT_144M_PRETENDED   0x1000
 103
 104 /* error returns for fd_cmd() */
 105 #define FD_FAILED -1
 106 #define FD_NOT_VALID -2
 107 #define FDC_ERRMAX      100     /* do not log more */
 108 /*
 109  * Stop retrying after this many DMA overruns.  Since each retry takes
 110  * one revolution, with 300 rpm., 25 retries take approximately 10
 111  * seconds which the read attempt will block in case the DMA overrun
 112  * is persistent.
 113  */
 114 #define FDC_DMAOV_MAX   25
 115
 116 /*
 117  * Timeout value for the PIO loops to wait until the FDC main status
 118  * register matches our expectations (request for master, direction
 119  * bit).  This is supposed to be a number of microseconds, although
 120  * timing might actually not be very accurate.
 121  *
 122  * Timeouts of 100 msec are believed to be required for some broken
 123  * (old) hardware.
 124  */
 125 #define FDSTS_TIMEOUT   100000
 126
 127 #define NUMTYPES 17
 128 #define NUMDENS  (NUMTYPES - 7)
 129
 130 /* These defines (-1) must match index for fd_types */
 131 #define F_TAPE_TYPE     0x020   /* bit for fd_types to indicate tape */
 132 #define NO_TYPE         0       /* must match NO_TYPE in ft.c */
 133 #define FD_1720         1
 134 #define FD_1480         2
 135 #define FD_1440         3
 136 #define FD_1200         4
 137 #define FD_820          5
 138 #define FD_800          6
 139 #define FD_720          7
 140 #define FD_360          8
 141 #define FD_640          9
 142 #define FD_1232         10
 143
 144 #define FD_1480in5_25   11
 145 #define FD_1440in5_25   12
 146 #define FD_820in5_25    13
 147 #define FD_800in5_25    14
 148 #define FD_720in5_25    15
 149 #define FD_360in5_25    16
 150 #define FD_640in5_25    17
 151
 152
 153 static struct fd_type fd_types[NUMTYPES] =
 154 {
 155 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
 156 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
 157 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
 158 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /*  1.2M in HD 5.25/3.5 */
 159 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /*  820K in HD 3.5in */
 160 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /*  800K in HD 3.5in */
 161 {  9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /*  720K in HD 3.5in */
 162 {  9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /*  360K in DD 5.25in */
 163 {  8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /*  640K in DD 5.25in */
 164 {  8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
 165
 166 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
 167 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
 168 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /*  820K in HD 5.25in */
 169 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /*  800K in HD 5.25in */
 170 {  9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /*  720K in HD 5.25in */
 171 {  9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /*  360K in HD 5.25in */
 172 {  8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /*  640K in HD 5.25in */
 173 };
 174
 175 #define DRVS_PER_CTLR 2         /* 2 floppies */
 176
 177 /***********************************************************************\
 178 * Per controller structure.                                             *
 179 \***********************************************************************/
 180 devclass_t fdc_devclass;
 181
 182 /***********************************************************************\
 183 * Per drive structure.                                                  *
 184 * N per controller  (DRVS_PER_CTLR)                                     *
 185 \***********************************************************************/
 186 struct fd_data {
 187         struct  fdc_data *fdc;  /* pointer to controller structure */
 188         int     fdsu;           /* this units number on this controller */
 189         int     type;           /* Drive type (FD_1440...) */
 190         struct  fd_type *ft;    /* pointer to the type descriptor */
 191         int     flags;
 192 #define FD_OPEN         0x01    /* it's open            */
 193 #define FD_ACTIVE       0x02    /* it's active          */
 194 #define FD_MOTOR        0x04    /* motor should be on   */
 195 #define FD_MOTOR_WAIT   0x08    /* motor coming up      */
 196         int     skip;
 197         int     hddrv;
 198 #define FD_NO_TRACK -2
 199         int     track;          /* where we think the head is */
 200         int     options;        /* user configurable options, see ioctl_fd.h */
 201         struct  callout toffhandle;
 202         struct  callout tohandle;
 203         struct  callout motor;
 204         struct  devstat device_stats;
 205         device_t dev;
 206         fdu_t   fdu;
 207 };
 208
 209 struct fdc_ivars {
 210         int     fdunit;
 211 };
 212 static devclass_t fd_devclass;
 213
 214 /***********************************************************************\
 215 * Throughout this file the following conventions will be used:          *
 216 * fd is a pointer to the fd_data struct for the drive in question       *
 217 * fdc is a pointer to the fdc_data struct for the controller            *
 218 * fdu is the floppy drive unit number                                   *
 219 * fdcu is the floppy controller unit number                             *
 220 * fdsu is the floppy drive unit number on that controller. (sub-unit)   *
 221 \***********************************************************************/
 222
 223 /* internal functions */
 224 static  void fdc_intr(void *);
 225 static void set_motor(struct fdc_data *, int, int);
 226 #  define TURNON 1
 227 #  define TURNOFF 0
 228 static timeout_t fd_turnoff;
 229 static timeout_t fd_motor_on;
 230 static void fd_turnon(struct fd_data *);
 231 static void fdc_reset(fdc_p);
 232 static int fd_in(struct fdc_data *, int *);
 233 static int out_fdc(struct fdc_data *, int);
 234 static void fdstart(struct fdc_data *);
 235 static timeout_t fd_iotimeout;
 236 static timeout_t fd_pseudointr;
 237 static int fdstate(struct fdc_data *);
 238 static int retrier(struct fdc_data *);
 239 static int fdformat(dev_t, struct fd_formb *, struct thread *);
 240
 241 static int enable_fifo(fdc_p fdc);
 242
 243 static int fifo_threshold = 8;  /* XXX: should be accessible via sysctl */
 244
 245
 246 #define DEVIDLE         0
 247 #define FINDWORK        1
 248 #define DOSEEK          2
 249 #define SEEKCOMPLETE    3
 250 #define IOCOMPLETE      4
 251 #define RECALCOMPLETE   5
 252 #define STARTRECAL      6
 253 #define RESETCTLR       7
 254 #define SEEKWAIT        8
 255 #define RECALWAIT       9
 256 #define MOTORWAIT       10
 257 #define IOTIMEDOUT      11
 258 #define RESETCOMPLETE   12
 259 #define PIOREAD         13
 260
 261 #ifdef  FDC_DEBUG
 262 static char const * const fdstates[] =
 263 {
 264 "DEVIDLE",
 265 "FINDWORK",
 266 "DOSEEK",
 267 "SEEKCOMPLETE",
 268 "IOCOMPLETE",
 269 "RECALCOMPLETE",
 270 "STARTRECAL",
 271 "RESETCTLR",
 272 "SEEKWAIT",
 273 "RECALWAIT",
 274 "MOTORWAIT",
 275 "IOTIMEDOUT",
 276 "RESETCOMPLETE",
 277 "PIOREAD",
 278 };
 279
 280 /* CAUTION: fd_debug causes huge amounts of logging output */
 281 static int volatile fd_debug = 0;
 282 #define TRACE0(arg) if(fd_debug) printf(arg)
 283 #define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2)
 284 #else /* FDC_DEBUG */
 285 #define TRACE0(arg)
 286 #define TRACE1(arg1, arg2)
 287 #endif /* FDC_DEBUG */
 288
 289 void
 290 fdout_wr(fdc_p fdc, u_int8_t v)
 291 {
 292         bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
 293 }
 294
 295 static u_int8_t
 296 fdsts_rd(fdc_p fdc)
 297 {
 298         return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
 299 }
 300
 301 static void
 302 fddata_wr(fdc_p fdc, u_int8_t v)
 303 {
 304         bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
 305 }
 306
 307 static u_int8_t
 308 fddata_rd(fdc_p fdc)
 309 {
 310         return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
 311 }
 312
 313 static void
 314 fdctl_wr_isa(fdc_p fdc, u_int8_t v)
 315 {
 316         bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
 317 }
 318
 319 #if 0
 320
 321 static u_int8_t
 322 fdin_rd(fdc_p fdc)
 323 {
 324         return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
 325 }
 326
 327 #endif
 328
 329 static  d_open_t        Fdopen; /* NOTE, not fdopen */
 330 static  d_close_t       fdclose;
 331 static  d_ioctl_t       fdioctl;
 332 static  d_strategy_t    fdstrategy;
 333
 334 static struct cdevsw fd_cdevsw = {
 335         /* name */      "fd",
 336         /* maj */       FD_CDEV_MAJOR,
 337         /* flags */     D_DISK,
 338         /* port */      NULL,
 339         /* clone */     NULL,
 340
 341         /* open */      Fdopen,
 342         /* close */     fdclose,
 343         /* read */      physread,
 344         /* write */     physwrite,
 345         /* ioctl */     fdioctl,
 346         /* poll */      nopoll,
 347         /* mmap */      nommap,
 348         /* strategy */  fdstrategy,
 349         /* dump */      nodump,
 350         /* psize */     nopsize
 351 };
 352
 353 static int
 354 fdc_err(struct fdc_data *fdc, const char *s)
 355 {
 356         fdc->fdc_errs++;
 357         if (s) {
 358                 if (fdc->fdc_errs < FDC_ERRMAX)
 359                         device_printf(fdc->fdc_dev, "%s", s);
 360                 else if (fdc->fdc_errs == FDC_ERRMAX)
 361                         device_printf(fdc->fdc_dev, "too many errors, not "
 362                                                     "logging any more\n");
 363         }
 364
 365         return FD_FAILED;
 366 }
 367
 368 /*
 369  * fd_cmd: Send a command to the chip.  Takes a varargs with this structure:
 370  * Unit number,
 371  * # of output bytes, output bytes as ints ...,
 372  * # of input bytes, input bytes as ints ...
 373  */
 374 int
 375 fd_cmd(struct fdc_data *fdc, int n_out, ...)
 376 {
 377         u_char cmd;
 378         int n_in;
 379         int n;
 380         __va_list ap;
 381
 382         __va_start(ap, n_out);
 383         cmd = (u_char)(__va_arg(ap, int));
 384         __va_end(ap);
 385         __va_start(ap, n_out);
 386         for (n = 0; n < n_out; n++)
 387         {
 388                 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
 389                 {
 390                         char msg[50];
 391                         snprintf(msg, sizeof(msg),
 392                                 "cmd %x failed at out byte %d of %d\n",
 393                                 cmd, n + 1, n_out);
 394                         return fdc_err(fdc, msg);
 395                 }
 396         }
 397         n_in = __va_arg(ap, int);
 398         for (n = 0; n < n_in; n++)
 399         {
 400                 int *ptr = __va_arg(ap, int *);
 401                 if (fd_in(fdc, ptr) < 0)
 402                 {
 403                         char msg[50];
 404                         snprintf(msg, sizeof(msg),
 405                                 "cmd %02x failed at in byte %d of %d\n",
 406                                 cmd, n + 1, n_in);
 407                         return fdc_err(fdc, msg);
 408                 }
 409         }
 410
 411         return 0;
 412 }
 413
 414 static int
 415 enable_fifo(fdc_p fdc)
 416 {
 417         int i, j;
 418
 419         if ((fdc->flags & FDC_HAS_FIFO) == 0) {
 420
 421                 /*
 422                  * XXX:
 423                  * Cannot use fd_cmd the normal way here, since
 424                  * this might be an invalid command. Thus we send the
 425                  * first byte, and check for an early turn of data directon.
 426                  */
 427
 428                 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
 429                         return fdc_err(fdc, "Enable FIFO failed\n");
 430
 431                 /* If command is invalid, return */
 432                 j = FDSTS_TIMEOUT;
 433                 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
 434                        != NE7_RQM && j-- > 0) {
 435                         if (i == (NE7_DIO | NE7_RQM)) {
 436                                 fdc_reset(fdc);
 437                                 return FD_FAILED;
 438                         }
 439                         DELAY(1);
 440                 }
 441                 if (j<0 ||
 442                     fd_cmd(fdc, 3,
 443                            0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
 444                         fdc_reset(fdc);
 445                         return fdc_err(fdc, "Enable FIFO failed\n");
 446                 }
 447                 fdc->flags |= FDC_HAS_FIFO;
 448                 return 0;
 449         }
 450         if (fd_cmd(fdc, 4,
 451                    I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
 452                 return fdc_err(fdc, "Re-enable FIFO failed\n");
 453         return 0;
 454 }
 455
 456 static int
 457 fd_sense_drive_status(fdc_p fdc, int *st3p)
 458 {
 459         int st3;
 460
 461         if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
 462         {
 463                 return fdc_err(fdc, "Sense Drive Status failed\n");
 464         }
 465         if (st3p)
 466                 *st3p = st3;
 467
 468         return 0;
 469 }
 470
 471 static int
 472 fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
 473 {
 474         int cyl, st0, ret;
 475
 476         ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
 477         if (ret) {
 478                 (void)fdc_err(fdc,
 479                               "sense intr err reading stat reg 0\n");
 480                 return ret;
 481         }
 482
 483         if (st0p)
 484                 *st0p = st0;
 485
 486         if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
 487                 /*
 488                  * There doesn't seem to have been an interrupt.
 489                  */
 490                 return FD_NOT_VALID;
 491         }
 492
 493         if (fd_in(fdc, &cyl) < 0) {
 494                 return fdc_err(fdc, "can't get cyl num\n");
 495         }
 496
 497         if (cylp)
 498                 *cylp = cyl;
 499
 500         return 0;
 501 }
 502
 503
 504 static int
 505 fd_read_status(fdc_p fdc, int fdsu)
 506 {
 507         int i, ret;
 508
 509         for (i = 0; i < 7; i++) {
 510                 /*
 511                  * XXX types are poorly chosen.  Only bytes can by read
 512                  * from the hardware, but fdc->status[] wants u_ints and
 513                  * fd_in() gives ints.
 514                  */
 515                 int status;
 516
 517                 ret = fd_in(fdc, &status);
 518                 fdc->status[i] = status;
 519                 if (ret != 0)
 520                         break;
 521         }
 522
 523         if (ret == 0)
 524                 fdc->flags |= FDC_STAT_VALID;
 525         else
 526                 fdc->flags &= ~FDC_STAT_VALID;
 527
 528         return ret;
 529 }
 530
 531 /****************************************************************************/
 532 /*                      autoconfiguration stuff                             */
 533 /****************************************************************************/
 534
 535 int
 536 fdc_alloc_resources(struct fdc_data *fdc)
 537 {
 538         device_t dev;
 539         int ispnp, ispcmcia;
 540
 541         dev = fdc->fdc_dev;
 542         ispnp = (fdc->flags & FDC_ISPNP) != 0;
 543         ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
 544         fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
 545         fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
 546
 547         /*
 548          * On standard ISA, we don't just use an 8 port range
 549          * (e.g. 0x3f0-0x3f7) since that covers an IDE control
 550          * register at 0x3f6.
 551          *
 552          * Isn't PC hardware wonderful.
 553          *
 554          * The Y-E Data PCMCIA FDC doesn't have this problem, it
 555          * uses the register with offset 6 for pseudo-DMA, and the
 556          * one with offset 7 as control register.
 557          */
 558         fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
 559                                              &fdc->rid_ioport, 0ul, ~0ul,
 560                                              ispcmcia ? 8 : (ispnp ? 1 : 6),
 561                                              RF_ACTIVE);
 562         if (fdc->res_ioport == 0) {
 563                 device_printf(dev, "cannot reserve I/O port range\n");
 564                 return ENXIO;
 565         }
 566         fdc->portt = rman_get_bustag(fdc->res_ioport);
 567         fdc->porth = rman_get_bushandle(fdc->res_ioport);
 568
 569         if (!ispcmcia) {
 570                 /*
 571                  * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
 572                  * and some at 0x3f0-0x3f5,0x3f7. We detect the former
 573                  * by checking the size and adjust the port address
 574                  * accordingly.
 575                  */
 576                 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
 577                         fdc->port_off = -2;
 578
 579                 /*
 580                  * Register the control port range as rid 1 if it
 581                  * isn't there already. Most PnP BIOSen will have
 582                  * already done this but non-PnP configurations don't.
 583                  *
 584                  * And some (!!) report 0x3f2-0x3f5 and completely
 585                  * leave out the control register!  It seems that some
 586                  * non-antique controller chips have a different
 587                  * method of programming the transfer speed which
 588                  * doesn't require the control register, but it's
 589                  * mighty bogus as the chip still responds to the
 590                  * address for the control register.
 591                  */
 592                 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
 593                         u_long ctlstart;
 594
 595                         /* Find the control port, usually 0x3f7 */
 596                         ctlstart = rman_get_start(fdc->res_ioport) +
 597                                 fdc->port_off + 7;
 598
 599                         bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
 600                 }
 601
 602                 /*
 603                  * Now (finally!) allocate the control port.
 604                  */
 605                 fdc->rid_ctl = 1;
 606                 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
 607                                                   &fdc->rid_ctl,
 608                                                   0ul, ~0ul, 1, RF_ACTIVE);
 609                 if (fdc->res_ctl == 0) {
 610                         device_printf(dev,
 611                                       "cannot reserve control I/O port range\n");
 612                         return ENXIO;
 613                 }
 614                 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
 615                 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
 616         }
 617
 618         fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
 619                                           &fdc->rid_irq, 0ul, ~0ul, 1,
 620                                           RF_ACTIVE);
 621         if (fdc->res_irq == 0) {
 622                 device_printf(dev, "cannot reserve interrupt line\n");
 623                 return ENXIO;
 624         }
 625
 626         if ((fdc->flags & FDC_NODMA) == 0) {
 627                 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
 628                                                   &fdc->rid_drq, 0ul, ~0ul, 1,
 629                                                   RF_ACTIVE);
 630                 if (fdc->res_drq == 0) {
 631                         device_printf(dev, "cannot reserve DMA request line\n");
 632                         return ENXIO;
 633                 }
 634                 fdc->dmachan = fdc->res_drq->r_start;
 635         }
 636
 637         return 0;
 638 }
 639
 640 void
 641 fdc_release_resources(struct fdc_data *fdc)
 642 {
 643         device_t dev;
 644
 645         dev = fdc->fdc_dev;
 646         if (fdc->res_irq != 0) {
 647                 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
 648                                         fdc->res_irq);
 649                 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
 650                                      fdc->res_irq);
 651         }
 652         if (fdc->res_ctl != 0) {
 653                 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
 654                                         fdc->res_ctl);
 655                 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
 656                                      fdc->res_ctl);
 657         }
 658         if (fdc->res_ioport != 0) {
 659                 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
 660                                         fdc->res_ioport);
 661                 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
 662                                      fdc->res_ioport);
 663         }
 664         if (fdc->res_drq != 0) {
 665                 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
 666                                         fdc->res_drq);
 667                 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
 668                                      fdc->res_drq);
 669         }
 670 }
 671
 672 /****************************************************************************/
 673 /*                      autoconfiguration stuff                             */
 674 /****************************************************************************/
 675
 676 static struct isa_pnp_id fdc_ids[] = {
 677         {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
 678         {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
 679         {0}
 680 };
 681
 682 int
 683 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
 684 {
 685         struct fdc_ivars *ivars = device_get_ivars(child);
 686
 687         switch (which) {
 688         case FDC_IVAR_FDUNIT:
 689                 *result = ivars->fdunit;
 690                 break;
 691         default:
 692                 return ENOENT;
 693         }
 694         return 0;
 695 }
 696
 697 /*
 698  * fdc controller section.
 699  */
 700 static int
 701 fdc_probe(device_t dev)
 702 {
 703         int     error, ic_type;
 704         struct  fdc_data *fdc;
 705
 706         fdc = device_get_softc(dev);
 707         bzero(fdc, sizeof *fdc);
 708         fdc->fdc_dev = dev;
 709         fdc->fdctl_wr = fdctl_wr_isa;
 710
 711         /* Check pnp ids */
 712         error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
 713         if (error == ENXIO)
 714                 return ENXIO;
 715         if (error == 0)
 716                 fdc->flags |= FDC_ISPNP;
 717
 718         /* Attempt to allocate our resources for the duration of the probe */
 719         error = fdc_alloc_resources(fdc);
 720         if (error)
 721                 goto out;
 722
 723         /* First - lets reset the floppy controller */
 724         fdout_wr(fdc, 0);
 725         DELAY(100);
 726         fdout_wr(fdc, FDO_FRST);
 727
 728         /* see if it can handle a command */
 729         if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
 730                    NE7_SPEC_2(2, 0), 0)) {
 731                 error = ENXIO;
 732                 goto out;
 733         }
 734
 735         if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
 736                 ic_type = (u_char)ic_type;
 737                 switch (ic_type) {
 738                 case 0x80:
 739                         device_set_desc(dev, "NEC 765 or clone");
 740                         fdc->fdct = FDC_NE765;
 741                         break;
 742                 case 0x81:
 743                         device_set_desc(dev, "Intel 82077 or clone");
 744                         fdc->fdct = FDC_I82077;
 745                         break;
 746                 case 0x90:
 747                         device_set_desc(dev, "NEC 72065B or clone");
 748                         fdc->fdct = FDC_NE72065;
 749                         break;
 750                 default:
 751                         device_set_desc(dev, "generic floppy controller");
 752                         fdc->fdct = FDC_UNKNOWN;
 753                         break;
 754                 }
 755         }
 756
 757 out:
 758         fdc_release_resources(fdc);
 759         return (error);
 760 }
 761
 762 /*
 763  * Add a child device to the fdc controller.  It will then be probed etc.
 764  */
 765 static void
 766 fdc_add_child(device_t dev, const char *name, int unit)
 767 {
 768         int     disabled;
 769         struct fdc_ivars *ivar;
 770         device_t child;
 771
 772         ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
 773         if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
 774                 ivar->fdunit = 0;
 775         child = device_add_child(dev, name, unit);
 776         if (child == NULL)
 777                 return;
 778         device_set_ivars(child, ivar);
 779         if (resource_int_value(name, unit, "disabled", &disabled) == 0
 780             && disabled != 0)
 781                 device_disable(child);
 782 }
 783
 784 int
 785 fdc_attach(device_t dev)
 786 {
 787         struct  fdc_data *fdc;
 788         int     i, error;
 789
 790         fdc = device_get_softc(dev);
 791         error = fdc_alloc_resources(fdc);
 792         if (error) {
 793                 device_printf(dev, "cannot re-aquire resources\n");
 794                 return error;
 795         }
 796         error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
 797                                INTR_TYPE_BIO, fdc_intr, fdc, &fdc->fdc_intr);
 798         if (error) {
 799                 device_printf(dev, "cannot setup interrupt\n");
 800                 return error;
 801         }
 802         fdc->fdcu = device_get_unit(dev);
 803         fdc->flags |= FDC_ATTACHED;
 804
 805         if ((fdc->flags & FDC_NODMA) == 0) {
 806                 /* Acquire the DMA channel forever, The driver will do the rest */
 807                                 /* XXX should integrate with rman */
 808                 isa_dma_acquire(fdc->dmachan);
 809                 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
 810         }
 811         fdc->state = DEVIDLE;
 812
 813         /* reset controller, turn motor off, clear fdout mirror reg */
 814         fdout_wr(fdc, ((fdc->fdout = 0)));
 815         bufq_init(&fdc->head);
 816
 817         /*
 818          * Probe and attach any children.  We should probably detect
 819          * devices from the BIOS unless overridden.
 820          */
 821         for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
 822              i != -1;
 823              i = resource_query_string(i, "at", device_get_nameunit(dev)))
 824                 fdc_add_child(dev, resource_query_name(i),
 825                                resource_query_unit(i));
 826
 827         return (bus_generic_attach(dev));
 828 }
 829
 830 int
 831 fdc_print_child(device_t me, device_t child)
 832 {
 833         int retval = 0;
 834
 835         retval += bus_print_child_header(me, child);
 836         retval += printf(" on %s drive %d\n", device_get_nameunit(me),
 837                fdc_get_fdunit(child));
 838
 839         return (retval);
 840 }
 841
 842 static device_method_t fdc_methods[] = {
 843         /* Device interface */
 844         DEVMETHOD(device_probe,         fdc_probe),
 845         DEVMETHOD(device_attach,        fdc_attach),
 846         DEVMETHOD(device_detach,        bus_generic_detach),
 847         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
 848         DEVMETHOD(device_suspend,       bus_generic_suspend),
 849         DEVMETHOD(device_resume,        bus_generic_resume),
 850
 851         /* Bus interface */
 852         DEVMETHOD(bus_print_child,      fdc_print_child),
 853         DEVMETHOD(bus_read_ivar,        fdc_read_ivar),
 854         /* Our children never use any other bus interface methods. */
 855
 856         { 0, 0 }
 857 };
 858
 859 static driver_t fdc_driver = {
 860         "fdc",
 861         fdc_methods,
 862         sizeof(struct fdc_data)
 863 };
 864
 865 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
 866
 867 /******************************************************************/
 868 /*
 869  * devices attached to the controller section.
 870  */
 871 static int
 872 fd_probe(device_t dev)
 873 {
 874         int     i;
 875         u_int   fdt, st0, st3;
 876         struct  fd_data *fd;
 877         struct  fdc_data *fdc;
 878         fdsu_t  fdsu;
 879         static int fd_fifo = 0;
 880
 881         fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
 882         fd = device_get_softc(dev);
 883         fdc = device_get_softc(device_get_parent(dev));
 884
 885         bzero(fd, sizeof *fd);
 886         fd->dev = dev;
 887         fd->fdc = fdc;
 888         fd->fdsu = fdsu;
 889         fd->fdu = device_get_unit(dev);
 890
 891 #ifdef __i386__
 892         /* look up what bios thinks we have */
 893         switch (fd->fdu) {
 894         case 0:
 895                 if ((fdc->flags & FDC_ISPCMCIA))
 896                         fdt = RTCFDT_144M;
 897                 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
 898                         fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
 899                 else
 900                         fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
 901                 break;
 902         case 1:
 903                 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
 904                 break;
 905         default:
 906                 fdt = RTCFDT_NONE;
 907                 break;
 908         }
 909 #else
 910         fdt = RTCFDT_144M;      /* XXX probably */
 911 #endif
 912
 913         /* is there a unit? */
 914         if (fdt == RTCFDT_NONE)
 915                 return (ENXIO);
 916
 917         /* select it */
 918         set_motor(fdc, fdsu, TURNON);
 919         DELAY(1000000); /* 1 sec */
 920
 921         /* XXX This doesn't work before the first set_motor() */
 922         if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
 923             && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
 924             && enable_fifo(fdc) == 0) {
 925                 device_printf(device_get_parent(dev),
 926                     "FIFO enabled, %d bytes threshold\n", fifo_threshold);
 927         }
 928         fd_fifo = 1;
 929
 930         if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
 931             && (st3 & NE7_ST3_T0)) {
 932                 /* if at track 0, first seek inwards */
 933                 /* seek some steps: */
 934                 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
 935                 DELAY(300000); /* ...wait a moment... */
 936                 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
 937         }
 938
 939         /* If we're at track 0 first seek inwards. */
 940         if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
 941                 /* Seek some steps... */
 942                 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
 943                         /* ...wait a moment... */
 944                         DELAY(300000);
 945                         /* make ctrlr happy: */
 946                         fd_sense_int(fdc, 0, 0);
 947                 }
 948         }
 949
 950         for (i = 0; i < 2; i++) {
 951                 /*
 952                  * we must recalibrate twice, just in case the
 953                  * heads have been beyond cylinder 76, since most
 954                  * FDCs still barf when attempting to recalibrate
 955                  * more than 77 steps
 956                  */
 957                 /* go back to 0: */
 958                 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
 959                         /* a second being enough for full stroke seek*/
 960                         DELAY(i == 0 ? 1000000 : 300000);
 961
 962                         /* anything responding? */
 963                         if (fd_sense_int(fdc, &st0, 0) == 0 &&
 964                             (st0 & NE7_ST0_EC) == 0)
 965                                 break; /* already probed succesfully */
 966                 }
 967         }
 968
 969         set_motor(fdc, fdsu, TURNOFF);
 970
 971         if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
 972                 return (ENXIO);
 973
 974         fd->track = FD_NO_TRACK;
 975         fd->fdc = fdc;
 976         fd->fdsu = fdsu;
 977         fd->options = 0;
 978         callout_init(&fd->toffhandle);
 979         callout_init(&fd->tohandle);
 980         callout_init(&fd->motor);
 981
 982         switch (fdt) {
 983         case RTCFDT_12M:
 984                 device_set_desc(dev, "1200-KB 5.25\" drive");
 985                 fd->type = FD_1200;
 986                 break;
 987         case RTCFDT_144M | RTCFDT_144M_PRETENDED:
 988                 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
 989                 fdt = RTCFDT_144M;
 990                 fd->type = FD_1440;
 991         case RTCFDT_144M:
 992                 device_set_desc(dev, "1440-KB 3.5\" drive");
 993                 fd->type = FD_1440;
 994                 break;
 995         case RTCFDT_288M:
 996         case RTCFDT_288M_1:
 997                 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
 998                 fd->type = FD_1440;
 999                 break;
1000         case RTCFDT_360K:
1001                 device_set_desc(dev, "360-KB 5.25\" drive");
1002                 fd->type = FD_360;
1003                 break;
1004         case RTCFDT_720K:
1005                 printf("720-KB 3.5\" drive");
1006                 fd->type = FD_720;
1007                 break;
1008         default:
1009                 return (ENXIO);
1010         }
1011         return (0);
1012 }
1013
1014 static int
1015 fd_attach(device_t dev)
1016 {
1017         struct  fd_data *fd;
1018 #if 0
1019         int     i;
1020         int     mynor;
1021         int     typemynor;
1022         int     typesize;
1023 #endif
1024
1025         fd = device_get_softc(dev);
1026
1027         cdevsw_add(&fd_cdevsw, -1 << 6, fd->fdu << 6);
1028         make_dev(&fd_cdevsw, (fd->fdu << 6),
1029                 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu);
1030
1031 #if 0
1032         /* Other make_dev() go here. */
1033 #endif
1034
1035         /*
1036          * Export the drive to the devstat interface.
1037          */
1038         devstat_add_entry(&fd->device_stats, device_get_name(dev),
1039                           device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1040                           DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1041                           DEVSTAT_PRIORITY_FD);
1042         return (0);
1043 }
1044
1045 static int
1046 fd_detach(device_t dev)
1047 {
1048         struct  fd_data *fd;
1049
1050         fd = device_get_softc(dev);
1051         callout_stop(&fd->toffhandle);
1052         callout_stop(&fd->motor);
1053
1054         return (0);
1055 }
1056
1057 static device_method_t fd_methods[] = {
1058         /* Device interface */
1059         DEVMETHOD(device_probe,         fd_probe),
1060         DEVMETHOD(device_attach,        fd_attach),
1061         DEVMETHOD(device_detach,        fd_detach),
1062         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
1063         DEVMETHOD(device_suspend,       bus_generic_suspend), /* XXX */
1064         DEVMETHOD(device_resume,        bus_generic_resume), /* XXX */
1065
1066         { 0, 0 }
1067 };
1068
1069 static driver_t fd_driver = {
1070         "fd",
1071         fd_methods,
1072         sizeof(struct fd_data)
1073 };
1074
1075 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
1076
1077 /****************************************************************************/
1078 /*                            motor control stuff                           */
1079 /*              remember to not deselect the drive we're working on         */
1080 /****************************************************************************/
1081 static void
1082 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1083 {
1084         int fdout = fdc->fdout;
1085         int needspecify = 0;
1086
1087         if(turnon) {
1088                 fdout &= ~FDO_FDSEL;
1089                 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1090         } else
1091                 fdout &= ~(FDO_MOEN0 << fdsu);
1092
1093         if(!turnon
1094            && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1095                 /* gonna turn off the last drive, put FDC to bed */
1096                 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1097         else {
1098                 /* make sure controller is selected and specified */
1099                 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1100                         needspecify = 1;
1101                 fdout |= (FDO_FRST|FDO_FDMAEN);
1102         }
1103
1104         fdout_wr(fdc, fdout);
1105         fdc->fdout = fdout;
1106         TRACE1("[0x%x->FDOUT]", fdout);
1107
1108         if (needspecify) {
1109                 /*
1110                  * XXX
1111                  * special case: since we have just woken up the FDC
1112                  * from its sleep, we silently assume the command will
1113                  * be accepted, and do not test for a timeout
1114                  */
1115                 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1116                              NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1117                              0);
1118                 if (fdc->flags & FDC_HAS_FIFO)
1119                         (void) enable_fifo(fdc);
1120         }
1121 }
1122
1123 static void
1124 fd_turnoff(void *xfd)
1125 {
1126         int     s;
1127         fd_p fd = xfd;
1128
1129         TRACE1("[fd%d: turnoff]", fd->fdu);
1130
1131         s = splbio();
1132         /*
1133          * Don't turn off the motor yet if the drive is active.
1134          *
1135          * If we got here, this could only mean we missed an interrupt.
1136          * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1137          * after a controller reset.  Just schedule a pseudo-interrupt
1138          * so the state machine gets re-entered.
1139          */
1140         if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1141                 fdc_intr(fd->fdc);
1142                 splx(s);
1143                 return;
1144         }
1145
1146         fd->flags &= ~FD_MOTOR;
1147         set_motor(fd->fdc, fd->fdsu, TURNOFF);
1148         splx(s);
1149 }
1150
1151 static void
1152 fd_motor_on(void *xfd)
1153 {
1154         int     s;
1155         fd_p fd = xfd;
1156
1157         s = splbio();
1158         fd->flags &= ~FD_MOTOR_WAIT;
1159         if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1160         {
1161                 fdc_intr(fd->fdc);
1162         }
1163         splx(s);
1164 }
1165
1166 static void
1167 fd_turnon(fd_p fd)
1168 {
1169         if(!(fd->flags & FD_MOTOR))
1170         {
1171                 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1172                 set_motor(fd->fdc, fd->fdsu, TURNON);
1173                 callout_reset(&fd->motor, hz, fd_motor_on, fd);
1174         }
1175 }
1176
1177 static void
1178 fdc_reset(fdc_p fdc)
1179 {
1180         /* Try a reset, keep motor on */
1181         fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1182         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1183         DELAY(100);
1184         /* enable FDC, but defer interrupts a moment */
1185         fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1186         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1187         DELAY(100);
1188         fdout_wr(fdc, fdc->fdout);
1189         TRACE1("[0x%x->FDOUT]", fdc->fdout);
1190
1191         /* XXX after a reset, silently believe the FDC will accept commands */
1192         (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1193                      NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1194                      0);
1195         if (fdc->flags & FDC_HAS_FIFO)
1196                 (void) enable_fifo(fdc);
1197 }
1198
1199 /****************************************************************************/
1200 /*                             fdc in/out                                   */
1201 /****************************************************************************/
1202 /*
1203  * FDC IO functions, take care of the main status register, timeout
1204  * in case the desired status bits are never set.
1205  *
1206  * These PIO loops initially start out with short delays between
1207  * each iteration in the expectation that the required condition
1208  * is usually met quickly, so it can be handled immediately.  After
1209  * about 1 ms, stepping is increased to achieve a better timing
1210  * accuracy in the calls to DELAY().
1211  */
1212 static int
1213 fd_in(struct fdc_data *fdc, int *ptr)
1214 {
1215         int i, j, step;
1216
1217         for (j = 0, step = 1;
1218             (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1219             j < FDSTS_TIMEOUT;
1220             j += step) {
1221                 if (i == NE7_RQM)
1222                         return (fdc_err(fdc, "ready for output in input\n"));
1223                 if (j == 1000)
1224                         step = 1000;
1225                 DELAY(step);
1226         }
1227         if (j >= FDSTS_TIMEOUT)
1228                 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1229 #ifdef  FDC_DEBUG
1230         i = fddata_rd(fdc);
1231         TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1232         *ptr = i;
1233         return (0);
1234 #else   /* !FDC_DEBUG */
1235         i = fddata_rd(fdc);
1236         if (ptr)
1237                 *ptr = i;
1238         return (0);
1239 #endif  /* FDC_DEBUG */
1240 }
1241
1242 static int
1243 out_fdc(struct fdc_data *fdc, int x)
1244 {
1245         int i, j, step;
1246
1247         for (j = 0, step = 1;
1248             (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1249             j < FDSTS_TIMEOUT;
1250             j += step) {
1251                 if (i == (NE7_DIO|NE7_RQM))
1252                         return (fdc_err(fdc, "ready for input in output\n"));
1253                 if (j == 1000)
1254                         step = 1000;
1255                 DELAY(step);
1256         }
1257         if (j >= FDSTS_TIMEOUT)
1258                 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1259
1260         /* Send the command and return */
1261         fddata_wr(fdc, x);
1262         TRACE1("[0x%x->FDDATA]", x);
1263         return (0);
1264 }
1265
1266 /****************************************************************************/
1267 /*                           fdopen/fdclose                                 */
1268 /****************************************************************************/
1269 int
1270 Fdopen(dev_t dev, int flags, int mode, struct thread *td)
1271 {
1272         fdu_t fdu = FDUNIT(minor(dev));
1273         int type = FDTYPE(minor(dev));
1274         fd_p    fd;
1275         fdc_p   fdc;
1276
1277         /* check bounds */
1278         if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1279                 return (ENXIO);
1280         fdc = fd->fdc;
1281         if ((fdc == NULL) || (fd->type == NO_TYPE))
1282                 return (ENXIO);
1283         if (type > NUMDENS)
1284                 return (ENXIO);
1285         if (type == 0)
1286                 type = fd->type;
1287         else {
1288                 /*
1289                  * For each type of basic drive, make sure we are trying
1290                  * to open a type it can do,
1291                  */
1292                 if (type != fd->type) {
1293                         switch (fd->type) {
1294                         case FD_360:
1295                                 return (ENXIO);
1296                         case FD_720:
1297                                 if (   type != FD_820
1298                                     && type != FD_800
1299                                     && type != FD_640
1300                                    )
1301                                         return (ENXIO);
1302                                 break;
1303                         case FD_1200:
1304                                 switch (type) {
1305                                 case FD_1480:
1306                                         type = FD_1480in5_25;
1307                                         break;
1308                                 case FD_1440:
1309                                         type = FD_1440in5_25;
1310                                         break;
1311                                 case FD_1232:
1312                                         break;
1313                                 case FD_820:
1314                                         type = FD_820in5_25;
1315                                         break;
1316                                 case FD_800:
1317                                         type = FD_800in5_25;
1318                                         break;
1319                                 case FD_720:
1320                                         type = FD_720in5_25;
1321                                         break;
1322                                 case FD_640:
1323                                         type = FD_640in5_25;
1324                                         break;
1325                                 case FD_360:
1326                                         type = FD_360in5_25;
1327                                         break;
1328                                 default:
1329                                         return(ENXIO);
1330                                 }
1331                                 break;
1332                         case FD_1440:
1333                                 if (   type != FD_1720
1334                                     && type != FD_1480
1335                                     && type != FD_1200
1336                                     && type != FD_820
1337                                     && type != FD_800
1338                                     && type != FD_720
1339                                     && type != FD_640
1340                                     )
1341                                         return(ENXIO);
1342                                 break;
1343                         }
1344                 }
1345         }
1346         fd->ft = fd_types + type - 1;
1347         fd->flags |= FD_OPEN;
1348         /*
1349          * Clearing the DMA overrun counter at open time is a bit messy.
1350          * Since we're only managing one counter per controller, opening
1351          * the second drive could mess it up.  Anyway, if the DMA overrun
1352          * condition is really persistent, it will eventually time out
1353          * still.  OTOH, clearing it here will ensure we'll at least start
1354          * trying again after a previous (maybe even long ago) failure.
1355          * Also, this is merely a stop-gap measure only that should not
1356          * happen during normal operation, so we can tolerate it to be a
1357          * bit sloppy about this.
1358          */
1359         fdc->dma_overruns = 0;
1360
1361         return 0;
1362 }
1363
1364 int
1365 fdclose(dev_t dev, int flags, int mode, struct thread *td)
1366 {
1367         fdu_t fdu = FDUNIT(minor(dev));
1368         struct fd_data *fd;
1369
1370         fd = devclass_get_softc(fd_devclass, fdu);
1371         fd->flags &= ~FD_OPEN;
1372         fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1373
1374         return (0);
1375 }
1376
1377 /****************************************************************************/
1378 /*                               fdstrategy                                 */
1379 /****************************************************************************/
1380 void
1381 fdstrategy(struct buf *bp)
1382 {
1383         unsigned nblocks, blknum, cando;
1384         int     s;
1385         fdu_t   fdu;
1386         fdc_p   fdc;
1387         fd_p    fd;
1388         size_t  fdblk;
1389
1390         fdu = FDUNIT(minor(bp->b_dev));
1391         fd = devclass_get_softc(fd_devclass, fdu);
1392         if (fd == 0)
1393                 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1394                       (u_long)major(bp->b_dev), (u_long)minor(bp->b_dev));
1395         fdc = fd->fdc;
1396         if (fd->type == NO_TYPE) {
1397                 bp->b_error = ENXIO;
1398                 bp->b_flags |= B_ERROR;
1399                 goto bad;
1400         };
1401
1402         fdblk = 128 << (fd->ft->secsize);
1403         if (!(bp->b_flags & B_FORMAT)) {
1404                 if (bp->b_blkno < 0) {
1405                         printf(
1406                 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
1407                                fdu, (u_long)bp->b_blkno, bp->b_bcount);
1408                         bp->b_error = EINVAL;
1409                         bp->b_flags |= B_ERROR;
1410                         goto bad;
1411                 }
1412                 if ((bp->b_bcount % fdblk) != 0) {
1413                         bp->b_error = EINVAL;
1414                         bp->b_flags |= B_ERROR;
1415                         goto bad;
1416                 }
1417         }
1418
1419         /*
1420          * Set up block calculations.
1421          */
1422         if (bp->b_blkno > 20000000) {
1423                 /*
1424                  * Reject unreasonably high block number, prevent the
1425                  * multiplication below from overflowing.
1426                  */
1427                 bp->b_error = EINVAL;
1428                 bp->b_flags |= B_ERROR;
1429                 goto bad;
1430         }
1431         blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk;
1432         nblocks = fd->ft->size;
1433         bp->b_resid = 0;
1434         if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1435                 if (blknum <= nblocks) {
1436                         cando = (nblocks - blknum) * fdblk;
1437                         bp->b_resid = bp->b_bcount - cando;
1438                         if (cando == 0)
1439                                 goto bad;       /* not actually bad but EOF */
1440                 } else {
1441                         bp->b_error = EINVAL;
1442                         bp->b_flags |= B_ERROR;
1443                         goto bad;
1444                 }
1445         }
1446         bp->b_pblkno = bp->b_blkno;
1447         s = splbio();
1448         bufqdisksort(&fdc->head, bp);
1449         callout_stop(&fd->toffhandle);
1450
1451         /* Tell devstat we are starting on the transaction */
1452         devstat_start_transaction(&fd->device_stats);
1453         device_busy(fd->dev);
1454
1455         fdstart(fdc);
1456         splx(s);
1457         return;
1458
1459 bad:
1460         biodone(bp);
1461 }
1462
1463 /***************************************************************\
1464 *                               fdstart                         *
1465 * We have just queued something.. if the controller is not busy *
1466 * then simulate the case where it has just finished a command   *
1467 * So that it (the interrupt routine) looks on the queue for more*
1468 * work to do and picks up what we just added.                   *
1469 * If the controller is already busy, we need do nothing, as it  *
1470 * will pick up our work when the present work completes         *
1471 \***************************************************************/
1472 static void
1473 fdstart(struct fdc_data *fdc)
1474 {
1475         int s;
1476
1477         s = splbio();
1478         if(fdc->state == DEVIDLE)
1479         {
1480                 fdc_intr(fdc);
1481         }
1482         splx(s);
1483 }
1484
1485 static void
1486 fd_iotimeout(void *xfdc)
1487 {
1488         fdc_p fdc;
1489         int s;
1490
1491         fdc = xfdc;
1492         TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1493
1494         /*
1495          * Due to IBM's brain-dead design, the FDC has a faked ready
1496          * signal, hardwired to ready == true. Thus, any command
1497          * issued if there's no diskette in the drive will _never_
1498          * complete, and must be aborted by resetting the FDC.
1499          * Many thanks, Big Blue!
1500          * The FDC must not be reset directly, since that would
1501          * interfere with the state machine.  Instead, pretend that
1502          * the command completed but was invalid.  The state machine
1503          * will reset the FDC and retry once.
1504          */
1505         s = splbio();
1506         fdc->status[0] = NE7_ST0_IC_IV;
1507         fdc->flags &= ~FDC_STAT_VALID;
1508         fdc->state = IOTIMEDOUT;
1509         fdc_intr(fdc);
1510         splx(s);
1511 }
1512
1513 /* just ensure it has the right spl */
1514 static void
1515 fd_pseudointr(void *xfdc)
1516 {
1517         int     s;
1518
1519         s = splbio();
1520         fdc_intr(xfdc);
1521         splx(s);
1522 }
1523
1524 /***********************************************************************\
1525 *                                 fdintr                                *
1526 * keep calling the state machine until it returns a 0                   *
1527 * ALWAYS called at SPLBIO                                               *
1528 \***********************************************************************/
1529 static void
1530 fdc_intr(void *xfdc)
1531 {
1532         fdc_p fdc = xfdc;
1533         while(fdstate(fdc))
1534                 ;
1535 }
1536
1537 /*
1538  * magic pseudo-DMA initialization for YE FDC. Sets count and
1539  * direction
1540  */
1541 #define SET_BCDR(fdc,wr,cnt,port) \
1542         bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port,  \
1543             ((cnt)-1) & 0xff);                                           \
1544         bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1545             ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1546
1547 /*
1548  * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1549  */
1550 static int fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count)
1551 {
1552         u_char *cptr = (u_char *)addr;
1553
1554         if (flags & B_READ) {
1555                 if (fdc->state != PIOREAD) {
1556                         fdc->state = PIOREAD;
1557                         return(0);
1558                 };
1559                 SET_BCDR(fdc, 0, count, 0);
1560                 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1561                     FDC_YE_DATAPORT, cptr, count);
1562         } else {
1563                 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1564                     FDC_YE_DATAPORT, cptr, count);
1565                 SET_BCDR(fdc, 0, count, 0);
1566         };
1567         return(1);
1568 }
1569
1570 /***********************************************************************\
1571 * The controller state machine.                                         *
1572 * if it returns a non zero value, it should be called again immediatly  *
1573 \***********************************************************************/
1574 static int
1575 fdstate(fdc_p fdc)
1576 {
1577         int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1578         unsigned blknum = 0, b_cylinder = 0;
1579         fdu_t fdu = fdc->fdu;
1580         fd_p fd;
1581         struct buf *bp;
1582         struct fd_formb *finfo = NULL;
1583         size_t fdblk;
1584
1585         bp = fdc->bp;
1586         if (bp == NULL) {
1587                 bp = bufq_first(&fdc->head);
1588                 if (bp != NULL) {
1589                         bufq_remove(&fdc->head, bp);
1590                         fdc->bp = bp;
1591                 }
1592         }
1593         if (bp == NULL) {
1594                 /***********************************************\
1595                 * nothing left for this controller to do        *
1596                 * Force into the IDLE state,                    *
1597                 \***********************************************/
1598                 fdc->state = DEVIDLE;
1599                 if (fdc->fd) {
1600                         device_printf(fdc->fdc_dev,
1601                             "unexpected valid fd pointer\n");
1602                         fdc->fd = (fd_p) 0;
1603                         fdc->fdu = -1;
1604                 }
1605                 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1606                 return (0);
1607         }
1608         fdu = FDUNIT(minor(bp->b_dev));
1609         fd = devclass_get_softc(fd_devclass, fdu);
1610         fdblk = 128 << fd->ft->secsize;
1611         if (fdc->fd && (fd != fdc->fd))
1612                 device_printf(fd->dev, "confused fd pointers\n");
1613         read = bp->b_flags & B_READ;
1614         format = bp->b_flags & B_FORMAT;
1615         if (format) {
1616                 finfo = (struct fd_formb *)bp->b_data;
1617                 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1618                         - (char *)finfo;
1619         }
1620         if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1621                 blknum = (unsigned) bp->b_pblkno * DEV_BSIZE/fdblk +
1622                         fd->skip/fdblk;
1623                 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
1624         }
1625         TRACE1("fd%d", fdu);
1626         TRACE1("[%s]", fdstates[fdc->state]);
1627         TRACE1("(0x%x)", fd->flags);
1628         callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
1629         switch (fdc->state)
1630         {
1631         case DEVIDLE:
1632         case FINDWORK:  /* we have found new work */
1633                 fdc->retry = 0;
1634                 fd->skip = 0;
1635                 fdc->fd = fd;
1636                 fdc->fdu = fdu;
1637                 fdc->fdctl_wr(fdc, fd->ft->trans);
1638                 TRACE1("[0x%x->FDCTL]", fd->ft->trans);
1639                 /*******************************************************\
1640                 * If the next drive has a motor startup pending, then   *
1641                 * it will start up in its own good time         *
1642                 \*******************************************************/
1643                 if(fd->flags & FD_MOTOR_WAIT) {
1644                         fdc->state = MOTORWAIT;
1645                         return (0); /* come back later */
1646                 }
1647                 /*******************************************************\
1648                 * Maybe if it's not starting, it SHOULD be starting     *
1649                 \*******************************************************/
1650                 if (!(fd->flags & FD_MOTOR))
1651                 {
1652                         fdc->state = MOTORWAIT;
1653                         fd_turnon(fd);
1654                         return (0);
1655                 }
1656                 else    /* at least make sure we are selected */
1657                 {
1658                         set_motor(fdc, fd->fdsu, TURNON);
1659                 }
1660                 if (fdc->flags & FDC_NEEDS_RESET) {
1661                         fdc->state = RESETCTLR;
1662                         fdc->flags &= ~FDC_NEEDS_RESET;
1663                 } else
1664                         fdc->state = DOSEEK;
1665                 break;
1666         case DOSEEK:
1667                 if (b_cylinder == (unsigned)fd->track)
1668                 {
1669                         fdc->state = SEEKCOMPLETE;
1670                         break;
1671                 }
1672                 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1673                            fd->fdsu, b_cylinder * fd->ft->steptrac,
1674                            0))
1675                 {
1676                         /*
1677                          * seek command not accepted, looks like
1678                          * the FDC went off to the Saints...
1679                          */
1680                         fdc->retry = 6; /* try a reset */
1681                         return(retrier(fdc));
1682                 }
1683                 fd->track = FD_NO_TRACK;
1684                 fdc->state = SEEKWAIT;
1685                 return(0);      /* will return later */
1686         case SEEKWAIT:
1687                 /* allow heads to settle */
1688                 callout_reset(&fdc->pseudointr_ch, hz / 16,
1689                                fd_pseudointr, fdc);
1690                 fdc->state = SEEKCOMPLETE;
1691                 return(0);      /* will return later */
1692         case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1693                 /* Make sure seek really happened*/
1694                 if(fd->track == FD_NO_TRACK) {
1695                         int descyl = b_cylinder * fd->ft->steptrac;
1696                         do {
1697                                 /*
1698                                  * This might be a "ready changed" interrupt,
1699                                  * which cannot really happen since the
1700                                  * RDY pin is hardwired to + 5 volts.  This
1701                                  * generally indicates a "bouncing" intr
1702                                  * line, so do one of the following:
1703                                  *
1704                                  * When running on an enhanced FDC that is
1705                                  * known to not go stuck after responding
1706                                  * with INVALID, fetch all interrupt states
1707                                  * until seeing either an INVALID or a
1708                                  * real interrupt condition.
1709                                  *
1710                                  * When running on a dumb old NE765, give
1711                                  * up immediately.  The controller will
1712                                  * provide up to four dummy RC interrupt
1713                                  * conditions right after reset (for the
1714                                  * corresponding four drives), so this is
1715                                  * our only chance to get notice that it
1716                                  * was not the FDC that caused the interrupt.
1717                                  */
1718                                 if (fd_sense_int(fdc, &st0, &cyl)
1719                                     == FD_NOT_VALID)
1720                                         return 0;
1721                                 if(fdc->fdct == FDC_NE765
1722                                    && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1723                                         return 0; /* hope for a real intr */
1724                         } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1725
1726                         if (0 == descyl) {
1727                                 int failed = 0;
1728                                 /*
1729                                  * seek to cyl 0 requested; make sure we are
1730                                  * really there
1731                                  */
1732                                 if (fd_sense_drive_status(fdc, &st3))
1733                                         failed = 1;
1734                                 if ((st3 & NE7_ST3_T0) == 0) {
1735                                         printf(
1736                 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1737                                                fdu, st3, NE7_ST3BITS);
1738                                         failed = 1;
1739                                 }
1740
1741                                 if (failed) {
1742                                         if(fdc->retry < 3)
1743                                                 fdc->retry = 3;
1744                                         return (retrier(fdc));
1745                                 }
1746                         }
1747
1748                         if (cyl != descyl) {
1749                                 printf(
1750                 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1751                                        fdu, descyl, cyl, st0);
1752                                 if (fdc->retry < 3)
1753                                         fdc->retry = 3;
1754                                 return (retrier(fdc));
1755                         }
1756                 }
1757
1758                 fd->track = b_cylinder;
1759                 if (!(fdc->flags & FDC_NODMA))
1760                         isa_dmastart(bp->b_flags, bp->b_data+fd->skip,
1761                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
1762                 sectrac = fd->ft->sectrac;
1763                 sec = blknum %  (sectrac * fd->ft->heads);
1764                 head = sec / sectrac;
1765                 sec = sec % sectrac + 1;
1766                 fd->hddrv = ((head&1)<<2)+fdu;
1767
1768                 if(format || !read)
1769                 {
1770                         /* make sure the drive is writable */
1771                         if(fd_sense_drive_status(fdc, &st3) != 0)
1772                         {
1773                                 /* stuck controller? */
1774                                 if (!(fdc->flags & FDC_NODMA))
1775                                         isa_dmadone(bp->b_flags,
1776                                                     bp->b_data + fd->skip,
1777                                                     format ? bp->b_bcount : fdblk,
1778                                                     fdc->dmachan);
1779                                 fdc->retry = 6; /* reset the beast */
1780                                 return (retrier(fdc));
1781                         }
1782                         if(st3 & NE7_ST3_WP)
1783                         {
1784                                 /*
1785                                  * XXX YES! this is ugly.
1786                                  * in order to force the current operation
1787                                  * to fail, we will have to fake an FDC
1788                                  * error - all error handling is done
1789                                  * by the retrier()
1790                                  */
1791                                 fdc->status[0] = NE7_ST0_IC_AT;
1792                                 fdc->status[1] = NE7_ST1_NW;
1793                                 fdc->status[2] = 0;
1794                                 fdc->status[3] = fd->track;
1795                                 fdc->status[4] = head;
1796                                 fdc->status[5] = sec;
1797                                 fdc->retry = 8; /* break out immediately */
1798                                 fdc->state = IOTIMEDOUT; /* not really... */
1799                                 return (1);
1800                         }
1801                 }
1802
1803                 if (format) {
1804                         if (fdc->flags & FDC_NODMA) {
1805                                 /*
1806                                  * This seems to be necessary for
1807                                  * whatever obscure reason; if we omit
1808                                  * it, we end up filling the sector ID
1809                                  * fields of the newly formatted track
1810                                  * entirely with garbage, causing
1811                                  * `wrong cylinder' errors all over
1812                                  * the place when trying to read them
1813                                  * back.
1814                                  *
1815                                  * Umpf.
1816                                  */
1817                                 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1818
1819                                 (void)fdcpio(fdc,bp->b_flags,
1820                                         bp->b_data+fd->skip,
1821                                         bp->b_bcount);
1822
1823                         }
1824                         /* formatting */
1825                         if(fd_cmd(fdc, 6,  NE7CMD_FORMAT, head << 2 | fdu,
1826                                   finfo->fd_formb_secshift,
1827                                   finfo->fd_formb_nsecs,
1828                                   finfo->fd_formb_gaplen,
1829                                   finfo->fd_formb_fillbyte, 0)) {
1830                                 /* controller fell over */
1831                                 if (!(fdc->flags & FDC_NODMA))
1832                                         isa_dmadone(bp->b_flags,
1833                                                     bp->b_data + fd->skip,
1834                                                     format ? bp->b_bcount : fdblk,
1835                                                     fdc->dmachan);
1836                                 fdc->retry = 6;
1837                                 return (retrier(fdc));
1838                         }
1839                 } else {
1840                         if (fdc->flags & FDC_NODMA) {
1841                                 /*
1842                                  * this seems to be necessary even when
1843                                  * reading data
1844                                  */
1845                                 SET_BCDR(fdc, 1, fdblk, 0);
1846
1847                                 /*
1848                                  * perform the write pseudo-DMA before
1849                                  * the WRITE command is sent
1850                                  */
1851                                 if (!read)
1852                                         (void)fdcpio(fdc,bp->b_flags,
1853                                             bp->b_data+fd->skip,
1854                                             fdblk);
1855                         }
1856                         if (fd_cmd(fdc, 9,
1857                                    (read ? NE7CMD_READ : NE7CMD_WRITE),
1858                                    head << 2 | fdu,  /* head & unit */
1859                                    fd->track,        /* track */
1860                                    head,
1861                                    sec,              /* sector + 1 */
1862                                    fd->ft->secsize,  /* sector size */
1863                                    sectrac,          /* sectors/track */
1864                                    fd->ft->gap,      /* gap size */
1865                                    fd->ft->datalen,  /* data length */
1866                                    0)) {
1867                                 /* the beast is sleeping again */
1868                                 if (!(fdc->flags & FDC_NODMA))
1869                                         isa_dmadone(bp->b_flags,
1870                                                     bp->b_data + fd->skip,
1871                                                     format ? bp->b_bcount : fdblk,
1872                                                     fdc->dmachan);
1873                                 fdc->retry = 6;
1874                                 return (retrier(fdc));
1875                         }
1876                 }
1877                 if (fdc->flags & FDC_NODMA)
1878                         /*
1879                          * if this is a read, then simply await interrupt
1880                          * before performing PIO
1881                          */
1882                         if (read && !fdcpio(fdc,bp->b_flags,
1883                             bp->b_data+fd->skip,fdblk)) {
1884                                 callout_reset(&fd->tohandle, hz,
1885                                                 fd_iotimeout, fdc);
1886                                 return(0);      /* will return later */
1887                         };
1888
1889                 /*
1890                  * write (or format) operation will fall through and
1891                  * await completion interrupt
1892                  */
1893                 fdc->state = IOCOMPLETE;
1894                 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
1895                 return (0);     /* will return later */
1896         case PIOREAD:
1897                 /*
1898                  * actually perform the PIO read.  The IOCOMPLETE case
1899                  * removes the timeout for us.
1900                  */
1901                 (void)fdcpio(fdc,bp->b_flags,bp->b_data+fd->skip,fdblk);
1902                 fdc->state = IOCOMPLETE;
1903                 /* FALLTHROUGH */
1904         case IOCOMPLETE: /* IO DONE, post-analyze */
1905                 callout_stop(&fd->tohandle);
1906
1907                 if (fd_read_status(fdc, fd->fdsu)) {
1908                         if (!(fdc->flags & FDC_NODMA))
1909                                 isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1910                                             format ? bp->b_bcount : fdblk,
1911                                             fdc->dmachan);
1912                         if (fdc->retry < 6)
1913                                 fdc->retry = 6; /* force a reset */
1914                         return (retrier(fdc));
1915                 }
1916
1917                 fdc->state = IOTIMEDOUT;
1918
1919                 /* FALLTHROUGH */
1920
1921         case IOTIMEDOUT:
1922                 if (!(fdc->flags & FDC_NODMA))
1923                         isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
1924                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
1925                 if (fdc->status[0] & NE7_ST0_IC) {
1926                         if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1927                             && fdc->status[1] & NE7_ST1_OR) {
1928                                 /*
1929                                  * DMA overrun. Someone hogged the bus and
1930                                  * didn't release it in time for the next
1931                                  * FDC transfer.
1932                                  *
1933                                  * We normally restart this without bumping
1934                                  * the retry counter.  However, in case
1935                                  * something is seriously messed up (like
1936                                  * broken hardware), we rather limit the
1937                                  * number of retries so the IO operation
1938                                  * doesn't block indefinately.
1939                                  */
1940                                 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
1941                                         fdc->state = SEEKCOMPLETE;
1942                                         return (1);
1943                                 } /* else fall through */
1944                         }
1945                         if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
1946                                 && fdc->retry < 6)
1947                                 fdc->retry = 6; /* force a reset */
1948                         else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
1949                                 && fdc->status[2] & NE7_ST2_WC
1950                                 && fdc->retry < 3)
1951                                 fdc->retry = 3; /* force recalibrate */
1952                         return (retrier(fdc));
1953                 }
1954                 /* All OK */
1955                 /* Operation successful, retry DMA overruns again next time. */
1956                 fdc->dma_overruns = 0;
1957                 fd->skip += fdblk;
1958                 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
1959                         /* set up next transfer */
1960                         fdc->state = DOSEEK;
1961                 } else {
1962                         /* ALL DONE */
1963                         fd->skip = 0;
1964                         fdc->bp = NULL;
1965                         device_unbusy(fd->dev);
1966                         devstat_end_transaction_buf(&fd->device_stats, bp);
1967                         biodone(bp);
1968                         fdc->fd = (fd_p) 0;
1969                         fdc->fdu = -1;
1970                         fdc->state = FINDWORK;
1971                 }
1972                 return (1);
1973         case RESETCTLR:
1974                 fdc_reset(fdc);
1975                 fdc->retry++;
1976                 fdc->state = RESETCOMPLETE;
1977                 return (0);
1978         case RESETCOMPLETE:
1979                 /*
1980                  * Discard all the results from the reset so that they
1981                  * can't cause an unexpected interrupt later.
1982                  */
1983                 for (i = 0; i < 4; i++)
1984                         (void)fd_sense_int(fdc, &st0, &cyl);
1985                 fdc->state = STARTRECAL;
1986                 /* Fall through. */
1987         case STARTRECAL:
1988                 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
1989                         /* arrgl */
1990                         fdc->retry = 6;
1991                         return (retrier(fdc));
1992                 }
1993                 fdc->state = RECALWAIT;
1994                 return (0);     /* will return later */
1995         case RECALWAIT:
1996                 /* allow heads to settle */
1997                 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
1998                 fdc->state = RECALCOMPLETE;
1999                 return (0);     /* will return later */
2000         case RECALCOMPLETE:
2001                 do {
2002                         /*
2003                          * See SEEKCOMPLETE for a comment on this:
2004                          */
2005                         if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2006                                 return 0;
2007                         if(fdc->fdct == FDC_NE765
2008                            && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2009                                 return 0; /* hope for a real intr */
2010                 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2011                 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2012                 {
2013                         if(fdc->retry > 3)
2014                                 /*
2015                                  * a recalibrate from beyond cylinder 77
2016                                  * will "fail" due to the FDC limitations;
2017                                  * since people used to complain much about
2018                                  * the failure message, try not logging
2019                                  * this one if it seems to be the first
2020                                  * time in a line
2021                                  */
2022                                 printf("fd%d: recal failed ST0 %b cyl %d\n",
2023                                        fdu, st0, NE7_ST0BITS, cyl);
2024                         if(fdc->retry < 3) fdc->retry = 3;
2025                         return (retrier(fdc));
2026                 }
2027                 fd->track = 0;
2028                 /* Seek (probably) necessary */
2029                 fdc->state = DOSEEK;
2030                 return (1);     /* will return immediatly */
2031         case MOTORWAIT:
2032                 if(fd->flags & FD_MOTOR_WAIT)
2033                 {
2034                         return (0); /* time's not up yet */
2035                 }
2036                 if (fdc->flags & FDC_NEEDS_RESET) {
2037                         fdc->state = RESETCTLR;
2038                         fdc->flags &= ~FDC_NEEDS_RESET;
2039                 } else {
2040                         /*
2041                          * If all motors were off, then the controller was
2042                          * reset, so it has lost track of the current
2043                          * cylinder.  Recalibrate to handle this case.
2044                          * But first, discard the results of the reset.
2045                          */
2046                         fdc->state = RESETCOMPLETE;
2047                 }
2048                 return (1);     /* will return immediatly */
2049         default:
2050                 device_printf(fdc->fdc_dev, "unexpected FD int->");
2051                 if (fd_read_status(fdc, fd->fdsu) == 0)
2052                         printf("FDC status :%x %x %x %x %x %x %x   ",
2053                                fdc->status[0],
2054                                fdc->status[1],
2055                                fdc->status[2],
2056                                fdc->status[3],
2057                                fdc->status[4],
2058                                fdc->status[5],
2059                                fdc->status[6] );
2060                 else
2061                         printf("No status available   ");
2062                 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2063                 {
2064                         printf("[controller is dead now]\n");
2065                         return (0);
2066                 }
2067                 printf("ST0 = %x, PCN = %x\n", st0, cyl);
2068                 return (0);
2069         }
2070         /*XXX confusing: some branches return immediately, others end up here*/
2071         return (1); /* Come back immediatly to new state */
2072 }
2073
2074 static int
2075 retrier(struct fdc_data *fdc)
2076 {
2077         struct buf *bp;
2078         struct fd_data *fd;
2079         int fdu;
2080
2081         bp = fdc->bp;
2082
2083         /* XXX shouldn't this be cached somewhere?  */
2084         fdu = FDUNIT(minor(bp->b_dev));
2085         fd = devclass_get_softc(fd_devclass, fdu);
2086         if (fd->options & FDOPT_NORETRY)
2087                 goto fail;
2088
2089         switch (fdc->retry) {
2090         case 0: case 1: case 2:
2091                 fdc->state = SEEKCOMPLETE;
2092                 break;
2093         case 3: case 4: case 5:
2094                 fdc->state = STARTRECAL;
2095                 break;
2096         case 6:
2097                 fdc->state = RESETCTLR;
2098                 break;
2099         case 7:
2100                 break;
2101         default:
2102         fail:
2103                 {
2104                         int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2105
2106                         if (printerror) {
2107                                 /*
2108                                  * note: use the correct device for more
2109                                  * verbose error reporting.
2110                                  */
2111                                 dev_t subdev;
2112
2113                                 subdev = make_sub_dev(bp->b_dev,
2114                                     (FDUNIT(minor(bp->b_dev))<<3)|RAW_PART);
2115                                 diskerr(bp, subdev,
2116                                         "hard error", LOG_PRINTF,
2117                                         fdc->fd->skip / DEV_BSIZE,
2118                                         (struct disklabel *)NULL);
2119                         }
2120                         if (printerror) {
2121                                 if (fdc->flags & FDC_STAT_VALID)
2122                                         printf(
2123                         " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2124                                                fdc->status[0], NE7_ST0BITS,
2125                                                fdc->status[1], NE7_ST1BITS,
2126                                                fdc->status[2], NE7_ST2BITS,
2127                                                fdc->status[3], fdc->status[4],
2128                                                fdc->status[5]);
2129                                 else
2130                                         printf(" (No status)\n");
2131                         }
2132                 }
2133                 bp->b_flags |= B_ERROR;
2134                 bp->b_error = EIO;
2135                 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2136                 fdc->bp = NULL;
2137                 fdc->fd->skip = 0;
2138                 device_unbusy(fd->dev);
2139                 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2140                 biodone(bp);
2141                 fdc->state = FINDWORK;
2142                 fdc->flags |= FDC_NEEDS_RESET;
2143                 fdc->fd = (fd_p) 0;
2144                 fdc->fdu = -1;
2145                 return (1);
2146         }
2147         fdc->retry++;
2148         return (1);
2149 }
2150
2151 static int
2152 fdformat(dev_t dev, struct fd_formb *finfo, struct thread *td)
2153 {
2154         struct proc *p = td->td_proc;
2155         fdu_t   fdu;
2156         fd_p    fd;
2157
2158         struct buf *bp;
2159         int rv = 0, s;
2160         size_t fdblk;
2161
2162         fdu     = FDUNIT(minor(dev));
2163         fd      = devclass_get_softc(fd_devclass, fdu);
2164         fdblk = 128 << fd->ft->secsize;
2165
2166         /* set up a buffer header for fdstrategy() */
2167         bp = malloc(sizeof(struct buf), M_TEMP, M_WAITOK | M_ZERO);
2168
2169         /*
2170          * keep the process from being swapped
2171          */
2172         PHOLD(p);
2173         BUF_LOCKINIT(bp);
2174         BUF_LOCK(bp, LK_EXCLUSIVE);
2175         bp->b_flags = B_PHYS | B_FORMAT;
2176
2177         /*
2178          * calculate a fake blkno, so fdstrategy() would initiate a
2179          * seek to the requested cylinder
2180          */
2181         bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
2182                 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
2183
2184         bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2185         bp->b_data = (caddr_t)finfo;
2186
2187         /* now do the format */
2188         bp->b_dev = dev;
2189         BUF_STRATEGY(bp, 0);
2190
2191         /* ...and wait for it to complete */
2192         s = splbio();
2193         while(!(bp->b_flags & B_DONE)) {
2194                 rv = tsleep((caddr_t)bp, 0, "fdform", 20 * hz);
2195                 if (rv == EWOULDBLOCK)
2196                         break;
2197         }
2198         splx(s);
2199
2200         if (rv == EWOULDBLOCK) {
2201                 /* timed out */
2202                 rv = EIO;
2203                 device_unbusy(fd->dev);
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         BUF_UNLOCK(bp);
2213         BUF_LOCKFREE(bp);
2214         free(bp, M_TEMP);
2215         return rv;
2216 }
2217
2218 /*
2219  * TODO: don't allocate buffer on stack.
2220  */
2221
2222 static int
2223 fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
2224 {
2225         fdu_t   fdu = FDUNIT(minor(dev));
2226         fd_p    fd = devclass_get_softc(fd_devclass, fdu);
2227         size_t fdblk;
2228
2229         struct fd_type *fdt;
2230         struct disklabel *dl;
2231         struct fdc_status *fsp;
2232         char buffer[DEV_BSIZE];
2233         int error = 0;
2234
2235         fdblk = 128 << fd->ft->secsize;
2236
2237         switch (cmd) {
2238         case DIOCGDINFO:
2239                 bzero(buffer, sizeof (buffer));
2240                 dl = (struct disklabel *)buffer;
2241                 dl->d_secsize = fdblk;
2242                 fdt = fd->ft;
2243                 dl->d_secpercyl = fdt->size / fdt->tracks;
2244                 dl->d_type = DTYPE_FLOPPY;
2245
2246                 if (readdisklabel(dev, dl)
2247                     == NULL)
2248                         error = 0;
2249                 else
2250                         error = EINVAL;
2251
2252                 *(struct disklabel *)addr = *dl;
2253                 break;
2254
2255         case DIOCSDINFO:
2256                 if ((flag & FWRITE) == 0)
2257                         error = EBADF;
2258                 break;
2259
2260         case DIOCWLABEL:
2261                 if ((flag & FWRITE) == 0)
2262                         error = EBADF;
2263                 break;
2264
2265         case DIOCWDINFO:
2266                 if ((flag & FWRITE) == 0) {
2267                         error = EBADF;
2268                         break;
2269                 }
2270
2271                 dl = (struct disklabel *)addr;
2272
2273                 if ((error = setdisklabel((struct disklabel *)buffer, dl,
2274                                           (u_long)0)) != 0)
2275                         break;
2276
2277                 error = writedisklabel(dev, (struct disklabel *)buffer);
2278                 break;
2279         case FD_FORM:
2280                 if ((flag & FWRITE) == 0)
2281                         error = EBADF;  /* must be opened for writing */
2282                 else if (((struct fd_formb *)addr)->format_version !=
2283                         FD_FORMAT_VERSION)
2284                         error = EINVAL; /* wrong version of formatting prog */
2285                 else
2286                         error = fdformat(dev, (struct fd_formb *)addr, td);
2287                 break;
2288
2289         case FD_GTYPE:                  /* get drive type */
2290                 *(struct fd_type *)addr = *fd->ft;
2291                 break;
2292
2293         case FD_STYPE:                  /* set drive type */
2294                 /* this is considered harmful; only allow for superuser */
2295                 if (suser(td) != 0)
2296                         return EPERM;
2297                 *fd->ft = *(struct fd_type *)addr;
2298                 break;
2299
2300         case FD_GOPTS:                  /* get drive options */
2301                 *(int *)addr = fd->options;
2302                 break;
2303
2304         case FD_SOPTS:                  /* set drive options */
2305                 fd->options = *(int *)addr;
2306                 break;
2307
2308         case FD_GSTAT:
2309                 fsp = (struct fdc_status *)addr;
2310                 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2311                         return EINVAL;
2312                 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2313                 break;
2314
2315         default:
2316                 error = ENOTTY;
2317                 break;
2318         }
2319         return (error);
2320 }
2321
2322 /*
2323  * Hello emacs, these are the
2324  * Local Variables:
2325  *  c-indent-level:               8
2326  *  c-continued-statement-offset: 8
2327  *  c-continued-brace-offset:     0
2328  *  c-brace-offset:              -8
2329  *  c-brace-imaginary-offset:     0
2330  *  c-argdecl-indent:             8
2331  *  c-label-offset:              -8
2332  *  c++-hanging-braces:           1
2333  *  c++-access-specifier-offset: -8
2334  *  c++-empty-arglist-indent:     8
2335  *  c++-friend-offset:            0
2336  * End:
2337  */