sys/dev/disk/fd/fd.c

   1 /*
   2  * Copyright (c) 1990 The Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Don Ahn.
   7  *
   8  * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu)
   9  * aided by the Linux floppy driver modifications from David Bateman
  10  * (dbateman@eng.uts.edu.au).
  11  *
  12  * Copyright (c) 1993, 1994 by
  13  *  jc@irbs.UUCP (John Capo)
  14  *  vak@zebub.msk.su (Serge Vakulenko)
  15  *  ache@astral.msk.su (Andrew A. Chernov)
  16  *
  17  * Copyright (c) 1993, 1994, 1995 by
  18  *  joerg_wunsch@uriah.sax.de (Joerg Wunsch)
  19  *  dufault@hda.com (Peter Dufault)
  20  *
  21  * Copyright (c) 2001 Joerg Wunsch,
  22  *  joerg_wunsch@uriah.sax.de (Joerg Wunsch)
  23  *
  24  * Redistribution and use in source and binary forms, with or without
  25  * modification, are permitted provided that the following conditions
  26  * are met:
  27  * 1. Redistributions of source code must retain the above copyright
  28  *    notice, this list of conditions and the following disclaimer.
  29  * 2. Redistributions in binary form must reproduce the above copyright
  30  *    notice, this list of conditions and the following disclaimer in the
  31  *    documentation and/or other materials provided with the distribution.
  32  * 3. All advertising materials mentioning features or use of this software
  33  *    must display the following acknowledgement:
  34  *      This product includes software developed by the University of
  35  *      California, Berkeley and its contributors.
  36  * 4. Neither the name of the University nor the names of its contributors
  37  *    may be used to endorse or promote products derived from this software
  38  *    without specific prior written permission.
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  *      from:   @(#)fd.c        7.4 (Berkeley) 5/25/91
  53  * $FreeBSD: src/sys/isa/fd.c,v 1.176.2.8 2002/05/15 21:56:14 joerg Exp $
  54  *
  55  */
  56
  57 #include "opt_fdc.h"
  58
  59 #include <sys/param.h>
  60 #include <sys/systm.h>
  61 #include <sys/bootmaj.h>
  62 #include <sys/kernel.h>
  63 #include <sys/buf.h>
  64 #include <sys/bus.h>
  65 #include <sys/conf.h>
  66 #include <sys/diskslice.h>
  67 #include <sys/disk.h>
  68 #include <sys/devicestat.h>
  69 #include <sys/fcntl.h>
  70 #include <sys/malloc.h>
  71 #include <sys/module.h>
  72 #include <sys/proc.h>
  73 #include <sys/priv.h>
  74 #include <sys/syslog.h>
  75 #include <sys/device.h>
  76 #include <sys/bus.h>
  77 #include <sys/rman.h>
  78 #include <sys/buf2.h>
  79 #include <sys/thread2.h>
  80
  81 #include <machine/clock.h>
  82 #include <machine/inttypes.h>
  83 #include <machine/ioctl_fd.h>
  84 #include <machine/stdarg.h>
  85
  86 #include <bus/isa/isavar.h>
  87 #include <bus/isa/isareg.h>
  88 #include "fdreg.h"
  89 #include "fdc.h"
  90 #include <bus/isa/rtc.h>
  91
  92 /* configuration flags */
  93 #define FDC_PRETEND_D0  (1 << 0)        /* pretend drive 0 to be there */
  94 #define FDC_NO_FIFO     (1 << 2)        /* do not enable FIFO  */
  95
  96 /* internally used only, not really from CMOS: */
  97 #define RTCFDT_144M_PRETENDED   0x1000
  98
  99 /* error returns for fd_cmd() */
 100 #define FD_FAILED -1
 101 #define FD_NOT_VALID -2
 102 #define FDC_ERRMAX      100     /* do not log more */
 103 /*
 104  * Stop retrying after this many DMA overruns.  Since each retry takes
 105  * one revolution, with 300 rpm., 25 retries take approximately 10
 106  * seconds which the read attempt will block in case the DMA overrun
 107  * is persistent.
 108  */
 109 #define FDC_DMAOV_MAX   25
 110
 111 /*
 112  * Timeout value for the PIO loops to wait until the FDC main status
 113  * register matches our expectations (request for master, direction
 114  * bit).  This is supposed to be a number of microseconds, although
 115  * timing might actually not be very accurate.
 116  *
 117  * Timeouts of 100 msec are believed to be required for some broken
 118  * (old) hardware.
 119  */
 120 #define FDSTS_TIMEOUT   100000
 121
 122 #define NUMTYPES 17
 123 #define NUMDENS  (NUMTYPES - 7)
 124
 125 /* These defines (-1) must match index for fd_types */
 126 #define F_TAPE_TYPE     0x020   /* bit for fd_types to indicate tape */
 127 #define NO_TYPE         0       /* must match NO_TYPE in ft.c */
 128 #define FD_1720         1
 129 #define FD_1480         2
 130 #define FD_1440         3
 131 #define FD_1200         4
 132 #define FD_820          5
 133 #define FD_800          6
 134 #define FD_720          7
 135 #define FD_360          8
 136 #define FD_640          9
 137 #define FD_1232         10
 138
 139 #define FD_1480in5_25   11
 140 #define FD_1440in5_25   12
 141 #define FD_820in5_25    13
 142 #define FD_800in5_25    14
 143 #define FD_720in5_25    15
 144 #define FD_360in5_25    16
 145 #define FD_640in5_25    17
 146
 147
 148 static struct fd_type fd_types[NUMTYPES] =
 149 {
 150 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
 151 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
 152 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
 153 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /*  1.2M in HD 5.25/3.5 */
 154 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /*  820K in HD 3.5in */
 155 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /*  800K in HD 3.5in */
 156 {  9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /*  720K in HD 3.5in */
 157 {  9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /*  360K in DD 5.25in */
 158 {  8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /*  640K in DD 5.25in */
 159 {  8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */
 160
 161 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
 162 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
 163 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /*  820K in HD 5.25in */
 164 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /*  800K in HD 5.25in */
 165 {  9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /*  720K in HD 5.25in */
 166 {  9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /*  360K in HD 5.25in */
 167 {  8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /*  640K in HD 5.25in */
 168 };
 169
 170 #define DRVS_PER_CTLR 2         /* 2 floppies */
 171
 172 /***********************************************************************\
 173 * Per controller structure.                                             *
 174 \***********************************************************************/
 175 devclass_t fdc_devclass;
 176
 177 /***********************************************************************\
 178 * Per drive structure.                                                  *
 179 * N per controller  (DRVS_PER_CTLR)                                     *
 180 \***********************************************************************/
 181 struct fd_data {
 182         struct  fdc_data *fdc;  /* pointer to controller structure */
 183         int     fdsu;           /* this units number on this controller */
 184         int     type;           /* Drive type (FD_1440...) */
 185         struct  fd_type ft;     /* the type descriptor */
 186         int     flags;
 187 #define FD_OPEN         0x01    /* it's open            */
 188 #define FD_ACTIVE       0x02    /* it's active          */
 189 #define FD_MOTOR        0x04    /* motor should be on   */
 190 #define FD_MOTOR_WAIT   0x08    /* motor coming up      */
 191         int     skip;
 192         int     hddrv;
 193 #define FD_NO_TRACK -2
 194         int     track;          /* where we think the head is */
 195         int     options;        /* user configurable options, see ioctl_fd.h */
 196         struct  callout toffhandle;
 197         struct  callout tohandle;
 198         struct  callout motor;
 199         struct  disk disk;
 200         struct  devstat device_stats;
 201         device_t dev;
 202         fdu_t   fdu;
 203 };
 204
 205 struct fdc_ivars {
 206         int     fdunit;
 207 };
 208 static devclass_t fd_devclass;
 209
 210 /***********************************************************************\
 211 * Throughout this file the following conventions will be used:          *
 212 * fd is a pointer to the fd_data struct for the drive in question       *
 213 * fdc is a pointer to the fdc_data struct for the controller            *
 214 * fdu is the floppy drive unit number                                   *
 215 * fdcu is the floppy controller unit number                             *
 216 * fdsu is the floppy drive unit number on that controller. (sub-unit)   *
 217 \***********************************************************************/
 218
 219 /* internal functions */
 220 static  void fdc_intr(void *);
 221 static void set_motor(struct fdc_data *, int, int);
 222 #  define TURNON 1
 223 #  define TURNOFF 0
 224 static timeout_t fd_turnoff;
 225 static timeout_t fd_motor_on;
 226 static void fd_turnon(struct fd_data *);
 227 static void fdc_reset(fdc_p);
 228 static int fd_in(struct fdc_data *, int *);
 229 static int out_fdc(struct fdc_data *, int);
 230 static void fdstart(struct fdc_data *);
 231 static timeout_t fd_iotimeout;
 232 static timeout_t fd_pseudointr;
 233 static int fdstate(struct fdc_data *);
 234 static int retrier(struct fdc_data *);
 235 static int fdformat(cdev_t, struct fd_formb *, struct ucred *);
 236
 237 static int enable_fifo(fdc_p fdc);
 238
 239 static int fifo_threshold = 8;  /* XXX: should be accessible via sysctl */
 240
 241
 242 #define DEVIDLE         0
 243 #define FINDWORK        1
 244 #define DOSEEK          2
 245 #define SEEKCOMPLETE    3
 246 #define IOCOMPLETE      4
 247 #define RECALCOMPLETE   5
 248 #define STARTRECAL      6
 249 #define RESETCTLR       7
 250 #define SEEKWAIT        8
 251 #define RECALWAIT       9
 252 #define MOTORWAIT       10
 253 #define IOTIMEDOUT      11
 254 #define RESETCOMPLETE   12
 255 #define PIOREAD         13
 256
 257 #ifdef  FDC_DEBUG
 258 static char const * const fdstates[] =
 259 {
 260 "DEVIDLE",
 261 "FINDWORK",
 262 "DOSEEK",
 263 "SEEKCOMPLETE",
 264 "IOCOMPLETE",
 265 "RECALCOMPLETE",
 266 "STARTRECAL",
 267 "RESETCTLR",
 268 "SEEKWAIT",
 269 "RECALWAIT",
 270 "MOTORWAIT",
 271 "IOTIMEDOUT",
 272 "RESETCOMPLETE",
 273 "PIOREAD",
 274 };
 275
 276 /* CAUTION: fd_debug causes huge amounts of logging output */
 277 static int volatile fd_debug = 0;
 278 #define TRACE0(arg) if(fd_debug) kprintf(arg)
 279 #define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2)
 280 #else /* FDC_DEBUG */
 281 #define TRACE0(arg)
 282 #define TRACE1(arg1, arg2)
 283 #endif /* FDC_DEBUG */
 284
 285 void
 286 fdout_wr(fdc_p fdc, u_int8_t v)
 287 {
 288         bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
 289 }
 290
 291 static u_int8_t
 292 fdsts_rd(fdc_p fdc)
 293 {
 294         return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
 295 }
 296
 297 static void
 298 fddata_wr(fdc_p fdc, u_int8_t v)
 299 {
 300         bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
 301 }
 302
 303 static u_int8_t
 304 fddata_rd(fdc_p fdc)
 305 {
 306         return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
 307 }
 308
 309 static void
 310 fdctl_wr_isa(fdc_p fdc, u_int8_t v)
 311 {
 312         bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
 313 }
 314
 315 #if 0
 316
 317 static u_int8_t
 318 fdin_rd(fdc_p fdc)
 319 {
 320         return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
 321 }
 322
 323 #endif
 324
 325 static  d_open_t        Fdopen; /* NOTE, not fdopen */
 326 static  d_close_t       fdclose;
 327 static  d_ioctl_t       fdioctl;
 328 static  d_strategy_t    fdstrategy;
 329
 330 static struct dev_ops fd_ops = {
 331         { "fd", FD_CDEV_MAJOR, D_DISK },
 332         .d_open =       Fdopen,
 333         .d_close =      fdclose,
 334         .d_read =       physread,
 335         .d_write =      physwrite,
 336         .d_ioctl =      fdioctl,
 337         .d_strategy =   fdstrategy,
 338 };
 339
 340 static int
 341 fdc_err(struct fdc_data *fdc, const char *s)
 342 {
 343         fdc->fdc_errs++;
 344         if (s) {
 345                 if (fdc->fdc_errs < FDC_ERRMAX)
 346                         device_printf(fdc->fdc_dev, "%s", s);
 347                 else if (fdc->fdc_errs == FDC_ERRMAX)
 348                         device_printf(fdc->fdc_dev, "too many errors, not "
 349                                                     "logging any more\n");
 350         }
 351
 352         return FD_FAILED;
 353 }
 354
 355 /*
 356  * fd_cmd: Send a command to the chip.  Takes a varargs with this structure:
 357  * Unit number,
 358  * # of output bytes, output bytes as ints ...,
 359  * # of input bytes, input bytes as ints ...
 360  */
 361 int
 362 fd_cmd(struct fdc_data *fdc, int n_out, ...)
 363 {
 364         u_char cmd;
 365         int n_in;
 366         int n;
 367         __va_list ap;
 368
 369         __va_start(ap, n_out);
 370         cmd = (u_char)(__va_arg(ap, int));
 371         __va_end(ap);
 372         __va_start(ap, n_out);
 373         for (n = 0; n < n_out; n++)
 374         {
 375                 if (out_fdc(fdc, __va_arg(ap, int)) < 0)
 376                 {
 377                         char msg[50];
 378                         ksnprintf(msg, sizeof(msg),
 379                                 "cmd %x failed at out byte %d of %d\n",
 380                                 cmd, n + 1, n_out);
 381                         return fdc_err(fdc, msg);
 382                 }
 383         }
 384         n_in = __va_arg(ap, int);
 385         for (n = 0; n < n_in; n++)
 386         {
 387                 int *ptr = __va_arg(ap, int *);
 388                 if (fd_in(fdc, ptr) < 0)
 389                 {
 390                         char msg[50];
 391                         ksnprintf(msg, sizeof(msg),
 392                                 "cmd %02x failed at in byte %d of %d\n",
 393                                 cmd, n + 1, n_in);
 394                         return fdc_err(fdc, msg);
 395                 }
 396         }
 397
 398         return 0;
 399 }
 400
 401 static int
 402 enable_fifo(fdc_p fdc)
 403 {
 404         int i, j;
 405
 406         if ((fdc->flags & FDC_HAS_FIFO) == 0) {
 407
 408                 /*
 409                  * XXX:
 410                  * Cannot use fd_cmd the normal way here, since
 411                  * this might be an invalid command. Thus we send the
 412                  * first byte, and check for an early turn of data directon.
 413                  */
 414
 415                 if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
 416                         return fdc_err(fdc, "Enable FIFO failed\n");
 417
 418                 /* If command is invalid, return */
 419                 j = FDSTS_TIMEOUT;
 420                 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
 421                        != NE7_RQM && j-- > 0) {
 422                         if (i == (NE7_DIO | NE7_RQM)) {
 423                                 fdc_reset(fdc);
 424                                 return FD_FAILED;
 425                         }
 426                         DELAY(1);
 427                 }
 428                 if (j<0 ||
 429                     fd_cmd(fdc, 3,
 430                            0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
 431                         fdc_reset(fdc);
 432                         return fdc_err(fdc, "Enable FIFO failed\n");
 433                 }
 434                 fdc->flags |= FDC_HAS_FIFO;
 435                 return 0;
 436         }
 437         if (fd_cmd(fdc, 4,
 438                    I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
 439                 return fdc_err(fdc, "Re-enable FIFO failed\n");
 440         return 0;
 441 }
 442
 443 static int
 444 fd_sense_drive_status(fdc_p fdc, int *st3p)
 445 {
 446         int st3;
 447
 448         if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
 449         {
 450                 return fdc_err(fdc, "Sense Drive Status failed\n");
 451         }
 452         if (st3p)
 453                 *st3p = st3;
 454
 455         return 0;
 456 }
 457
 458 static int
 459 fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
 460 {
 461         int cyl, st0, ret;
 462
 463         ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
 464         if (ret) {
 465                 (void)fdc_err(fdc,
 466                               "sense intr err reading stat reg 0\n");
 467                 return ret;
 468         }
 469
 470         if (st0p)
 471                 *st0p = st0;
 472
 473         if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
 474                 /*
 475                  * There doesn't seem to have been an interrupt.
 476                  */
 477                 return FD_NOT_VALID;
 478         }
 479
 480         if (fd_in(fdc, &cyl) < 0) {
 481                 return fdc_err(fdc, "can't get cyl num\n");
 482         }
 483
 484         if (cylp)
 485                 *cylp = cyl;
 486
 487         return 0;
 488 }
 489
 490
 491 static int
 492 fd_read_status(fdc_p fdc, int fdsu)
 493 {
 494         int i, ret;
 495
 496         for (i = 0; i < 7; i++) {
 497                 /*
 498                  * XXX types are poorly chosen.  Only bytes can by read
 499                  * from the hardware, but fdc->status[] wants u_ints and
 500                  * fd_in() gives ints.
 501                  */
 502                 int status;
 503
 504                 ret = fd_in(fdc, &status);
 505                 fdc->status[i] = status;
 506                 if (ret != 0)
 507                         break;
 508         }
 509
 510         if (ret == 0)
 511                 fdc->flags |= FDC_STAT_VALID;
 512         else
 513                 fdc->flags &= ~FDC_STAT_VALID;
 514
 515         return ret;
 516 }
 517
 518 /****************************************************************************/
 519 /*                      autoconfiguration stuff                             */
 520 /****************************************************************************/
 521
 522 int
 523 fdc_alloc_resources(struct fdc_data *fdc)
 524 {
 525         device_t dev;
 526         int ispnp, ispcmcia;
 527
 528         dev = fdc->fdc_dev;
 529         ispnp = (fdc->flags & FDC_ISPNP) != 0;
 530         ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
 531         fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
 532         fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
 533
 534         /*
 535          * On standard ISA, we don't just use an 8 port range
 536          * (e.g. 0x3f0-0x3f7) since that covers an IDE control
 537          * register at 0x3f6.
 538          *
 539          * Isn't PC hardware wonderful.
 540          *
 541          * The Y-E Data PCMCIA FDC doesn't have this problem, it
 542          * uses the register with offset 6 for pseudo-DMA, and the
 543          * one with offset 7 as control register.
 544          */
 545         fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
 546                                              &fdc->rid_ioport, 0ul, ~0ul,
 547                                              ispcmcia ? 8 : (ispnp ? 1 : 6),
 548                                              RF_ACTIVE);
 549         if (fdc->res_ioport == 0) {
 550                 device_printf(dev, "cannot reserve I/O port range\n");
 551                 return ENXIO;
 552         }
 553         fdc->portt = rman_get_bustag(fdc->res_ioport);
 554         fdc->porth = rman_get_bushandle(fdc->res_ioport);
 555
 556         if (!ispcmcia) {
 557                 /*
 558                  * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
 559                  * and some at 0x3f0-0x3f5,0x3f7. We detect the former
 560                  * by checking the size and adjust the port address
 561                  * accordingly.
 562                  */
 563                 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
 564                         fdc->port_off = -2;
 565
 566                 /*
 567                  * Register the control port range as rid 1 if it
 568                  * isn't there already. Most PnP BIOSen will have
 569                  * already done this but non-PnP configurations don't.
 570                  *
 571                  * And some (!!) report 0x3f2-0x3f5 and completely
 572                  * leave out the control register!  It seems that some
 573                  * non-antique controller chips have a different
 574                  * method of programming the transfer speed which
 575                  * doesn't require the control register, but it's
 576                  * mighty bogus as the chip still responds to the
 577                  * address for the control register.
 578                  */
 579                 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
 580                         u_long ctlstart;
 581
 582                         /* Find the control port, usually 0x3f7 */
 583                         ctlstart = rman_get_start(fdc->res_ioport) +
 584                                 fdc->port_off + 7;
 585
 586                         bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
 587                 }
 588
 589                 /*
 590                  * Now (finally!) allocate the control port.
 591                  */
 592                 fdc->rid_ctl = 1;
 593                 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
 594                                                   &fdc->rid_ctl,
 595                                                   0ul, ~0ul, 1, RF_ACTIVE);
 596                 if (fdc->res_ctl == 0) {
 597                         device_printf(dev,
 598                                       "cannot reserve control I/O port range\n");
 599                         return ENXIO;
 600                 }
 601                 fdc->ctlt = rman_get_bustag(fdc->res_ctl);
 602                 fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
 603         }
 604
 605         fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
 606                                           &fdc->rid_irq, 0ul, ~0ul, 1,
 607                                           RF_ACTIVE);
 608         if (fdc->res_irq == 0) {
 609                 device_printf(dev, "cannot reserve interrupt line\n");
 610                 return ENXIO;
 611         }
 612
 613         if ((fdc->flags & FDC_NODMA) == 0) {
 614                 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
 615                                                   &fdc->rid_drq, 0ul, ~0ul, 1,
 616                                                   RF_ACTIVE);
 617                 if (fdc->res_drq == 0) {
 618                         device_printf(dev, "cannot reserve DMA request line\n");
 619                         return ENXIO;
 620                 }
 621                 fdc->dmachan = fdc->res_drq->r_start;
 622         }
 623
 624         return 0;
 625 }
 626
 627 void
 628 fdc_release_resources(struct fdc_data *fdc)
 629 {
 630         device_t dev;
 631
 632         dev = fdc->fdc_dev;
 633         if (fdc->res_irq != 0) {
 634                 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
 635                                         fdc->res_irq);
 636                 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
 637                                      fdc->res_irq);
 638         }
 639         if (fdc->res_ctl != 0) {
 640                 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
 641                                         fdc->res_ctl);
 642                 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
 643                                      fdc->res_ctl);
 644         }
 645         if (fdc->res_ioport != 0) {
 646                 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
 647                                         fdc->res_ioport);
 648                 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
 649                                      fdc->res_ioport);
 650         }
 651         if (fdc->res_drq != 0) {
 652                 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
 653                                         fdc->res_drq);
 654                 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
 655                                      fdc->res_drq);
 656         }
 657 }
 658
 659 /****************************************************************************/
 660 /*                      autoconfiguration stuff                             */
 661 /****************************************************************************/
 662
 663 static struct isa_pnp_id fdc_ids[] = {
 664         {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
 665         {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
 666         {0}
 667 };
 668
 669 int
 670 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result)
 671 {
 672         struct fdc_ivars *ivars = device_get_ivars(child);
 673
 674         switch (which) {
 675         case FDC_IVAR_FDUNIT:
 676                 *result = ivars->fdunit;
 677                 break;
 678         default:
 679                 return ENOENT;
 680         }
 681         return 0;
 682 }
 683
 684 /*
 685  * fdc controller section.
 686  */
 687 static int
 688 fdc_probe(device_t dev)
 689 {
 690         int     error, ic_type;
 691         struct  fdc_data *fdc;
 692
 693         fdc = device_get_softc(dev);
 694         bzero(fdc, sizeof *fdc);
 695         fdc->fdc_dev = dev;
 696         fdc->fdctl_wr = fdctl_wr_isa;
 697
 698         /* Check pnp ids */
 699         error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
 700         if (error == ENXIO)
 701                 return ENXIO;
 702         if (error == 0)
 703                 fdc->flags |= FDC_ISPNP;
 704
 705         /* Attempt to allocate our resources for the duration of the probe */
 706         error = fdc_alloc_resources(fdc);
 707         if (error)
 708                 goto out;
 709
 710         /* First - lets reset the floppy controller */
 711         fdout_wr(fdc, 0);
 712         DELAY(100);
 713         fdout_wr(fdc, FDO_FRST);
 714
 715         /* see if it can handle a command */
 716         if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
 717                    NE7_SPEC_2(2, 0), 0)) {
 718                 error = ENXIO;
 719                 goto out;
 720         }
 721
 722         if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
 723                 ic_type = (u_char)ic_type;
 724                 switch (ic_type) {
 725                 case 0x80:
 726                         device_set_desc(dev, "NEC 765 or clone");
 727                         fdc->fdct = FDC_NE765;
 728                         break;
 729                 case 0x81:
 730                         device_set_desc(dev, "Intel 82077 or clone");
 731                         fdc->fdct = FDC_I82077;
 732                         break;
 733                 case 0x90:
 734                         device_set_desc(dev, "NEC 72065B or clone");
 735                         fdc->fdct = FDC_NE72065;
 736                         break;
 737                 default:
 738                         device_set_desc(dev, "generic floppy controller");
 739                         fdc->fdct = FDC_UNKNOWN;
 740                         break;
 741                 }
 742         }
 743
 744 out:
 745         fdc_release_resources(fdc);
 746         return (error);
 747 }
 748
 749 /*
 750  * Add a child device to the fdc controller.  It will then be probed etc.
 751  */
 752 static void
 753 fdc_add_child(device_t dev, const char *name, int unit)
 754 {
 755         int     disabled;
 756         struct fdc_ivars *ivar;
 757         device_t child;
 758
 759         ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO);
 760         if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
 761                 ivar->fdunit = 0;
 762         child = device_add_child(dev, name, unit);
 763         if (child == NULL)
 764                 return;
 765         device_set_ivars(child, ivar);
 766         if (resource_int_value(name, unit, "disabled", &disabled) == 0
 767             && disabled != 0)
 768                 device_disable(child);
 769 }
 770
 771 int
 772 fdc_attach(device_t dev)
 773 {
 774         struct  fdc_data *fdc;
 775         int     i, error;
 776
 777         fdc = device_get_softc(dev);
 778
 779         callout_init(&fdc->pseudointr_ch);
 780
 781         error = fdc_alloc_resources(fdc);
 782         if (error) {
 783                 device_printf(dev, "cannot reacquire resources\n");
 784                 return error;
 785         }
 786         error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
 787                                0, fdc_intr, fdc,
 788                                &fdc->fdc_intr, NULL);
 789         if (error) {
 790                 device_printf(dev, "cannot setup interrupt\n");
 791                 return error;
 792         }
 793         fdc->fdcu = device_get_unit(dev);
 794         fdc->flags |= FDC_ATTACHED;
 795
 796         if ((fdc->flags & FDC_NODMA) == 0) {
 797                 /* Acquire the DMA channel forever, The driver will do the rest */
 798                                 /* XXX should integrate with rman */
 799                 isa_dma_acquire(fdc->dmachan);
 800                 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
 801         }
 802         fdc->state = DEVIDLE;
 803
 804         /* reset controller, turn motor off, clear fdout mirror reg */
 805         fdout_wr(fdc, ((fdc->fdout = 0)));
 806         bioq_init(&fdc->bio_queue);
 807
 808         /*
 809          * Probe and attach any children.  We should probably detect
 810          * devices from the BIOS unless overridden.
 811          */
 812         for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
 813              i != -1;
 814              i = resource_query_string(i, "at", device_get_nameunit(dev)))
 815                 fdc_add_child(dev, resource_query_name(i),
 816                                resource_query_unit(i));
 817
 818         return (bus_generic_attach(dev));
 819 }
 820
 821 int
 822 fdc_print_child(device_t me, device_t child)
 823 {
 824         int retval = 0;
 825
 826         retval += bus_print_child_header(me, child);
 827         retval += kprintf(" on %s drive %d\n", device_get_nameunit(me),
 828                fdc_get_fdunit(child));
 829
 830         return (retval);
 831 }
 832
 833 static device_method_t fdc_methods[] = {
 834         /* Device interface */
 835         DEVMETHOD(device_probe,         fdc_probe),
 836         DEVMETHOD(device_attach,        fdc_attach),
 837         DEVMETHOD(device_detach,        bus_generic_detach),
 838         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
 839         DEVMETHOD(device_suspend,       bus_generic_suspend),
 840         DEVMETHOD(device_resume,        bus_generic_resume),
 841
 842         /* Bus interface */
 843         DEVMETHOD(bus_print_child,      fdc_print_child),
 844         DEVMETHOD(bus_read_ivar,        fdc_read_ivar),
 845         /* Our children never use any other bus interface methods. */
 846
 847         { 0, 0 }
 848 };
 849
 850 static driver_t fdc_driver = {
 851         "fdc",
 852         fdc_methods,
 853         sizeof(struct fdc_data)
 854 };
 855
 856 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, NULL, NULL);
 857 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, NULL, NULL);
 858
 859 /******************************************************************/
 860 /*
 861  * devices attached to the controller section.
 862  */
 863 static int
 864 fd_probe(device_t dev)
 865 {
 866         int     i;
 867         u_int   fdt, st0, st3;
 868         struct  fd_data *fd;
 869         struct  fdc_data *fdc;
 870         fdsu_t  fdsu;
 871         static int fd_fifo = 0;
 872
 873         fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
 874         fd = device_get_softc(dev);
 875         fdc = device_get_softc(device_get_parent(dev));
 876
 877         bzero(fd, sizeof *fd);
 878         fd->dev = dev;
 879         fd->fdc = fdc;
 880         fd->fdsu = fdsu;
 881         fd->fdu = device_get_unit(dev);
 882
 883 #ifdef __i386__
 884         /* look up what bios thinks we have */
 885         switch (fd->fdu) {
 886         case 0:
 887                 if ((fdc->flags & FDC_ISPCMCIA))
 888                         fdt = RTCFDT_144M;
 889                 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
 890                         fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
 891                 else
 892                         fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
 893                 break;
 894         case 1:
 895                 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
 896                 break;
 897         default:
 898                 fdt = RTCFDT_NONE;
 899                 break;
 900         }
 901 #else
 902         fdt = RTCFDT_144M;      /* XXX probably */
 903 #endif
 904
 905         /* is there a unit? */
 906         if (fdt == RTCFDT_NONE)
 907                 return (ENXIO);
 908
 909         /* select it */
 910         set_motor(fdc, fdsu, TURNON);
 911         DELAY(1000000); /* 1 sec */
 912
 913         /* XXX This doesn't work before the first set_motor() */
 914         if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
 915             && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
 916             && enable_fifo(fdc) == 0) {
 917                 device_printf(device_get_parent(dev),
 918                     "FIFO enabled, %d bytes threshold\n", fifo_threshold);
 919         }
 920         fd_fifo = 1;
 921
 922         if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
 923             && (st3 & NE7_ST3_T0)) {
 924                 /* if at track 0, first seek inwards */
 925                 /* seek some steps: */
 926                 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
 927                 DELAY(300000); /* ...wait a moment... */
 928                 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
 929         }
 930
 931         /* If we're at track 0 first seek inwards. */
 932         if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
 933                 /* Seek some steps... */
 934                 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
 935                         /* ...wait a moment... */
 936                         DELAY(300000);
 937                         /* make ctrlr happy: */
 938                         fd_sense_int(fdc, 0, 0);
 939                 }
 940         }
 941
 942         for (i = 0; i < 2; i++) {
 943                 /*
 944                  * we must recalibrate twice, just in case the
 945                  * heads have been beyond cylinder 76, since most
 946                  * FDCs still barf when attempting to recalibrate
 947                  * more than 77 steps
 948                  */
 949                 /* go back to 0: */
 950                 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
 951                         /* a second being enough for full stroke seek*/
 952                         DELAY(i == 0 ? 1000000 : 300000);
 953
 954                         /* anything responding? */
 955                         if (fd_sense_int(fdc, &st0, 0) == 0 &&
 956                             (st0 & NE7_ST0_EC) == 0)
 957                                 break; /* already probed succesfully */
 958                 }
 959         }
 960
 961         set_motor(fdc, fdsu, TURNOFF);
 962
 963         if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
 964                 return (ENXIO);
 965
 966         fd->track = FD_NO_TRACK;
 967         fd->fdc = fdc;
 968         fd->fdsu = fdsu;
 969         fd->options = 0;
 970         callout_init(&fd->toffhandle);
 971         callout_init(&fd->tohandle);
 972         callout_init(&fd->motor);
 973
 974         switch (fdt) {
 975         case RTCFDT_12M:
 976                 device_set_desc(dev, "1200-KB 5.25\" drive");
 977                 fd->type = FD_1200;
 978                 break;
 979         case RTCFDT_144M | RTCFDT_144M_PRETENDED:
 980                 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
 981                 fd->type = FD_1440;
 982                 break;
 983         case RTCFDT_144M:
 984                 device_set_desc(dev, "1440-KB 3.5\" drive");
 985                 fd->type = FD_1440;
 986                 break;
 987         case RTCFDT_288M:
 988         case RTCFDT_288M_1:
 989                 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
 990                 fd->type = FD_1440;
 991                 break;
 992         case RTCFDT_360K:
 993                 device_set_desc(dev, "360-KB 5.25\" drive");
 994                 fd->type = FD_360;
 995                 break;
 996         case RTCFDT_720K:
 997                 kprintf("720-KB 3.5\" drive");
 998                 fd->type = FD_720;
 999                 break;
1000         default:
1001                 return (ENXIO);
1002         }
1003         fd->ft = fd_types[fd->type - 1];
1004         return (0);
1005 }
1006
1007 static int
1008 fd_attach(device_t dev)
1009 {
1010         struct disk_info info;
1011         struct fd_data *fd;
1012         struct fd_type *ft;
1013
1014         fd = device_get_softc(dev);
1015
1016         disk_create(fd->fdu, &fd->disk, &fd_ops);
1017         disk_setdisktype(&fd->disk, "floppy");
1018
1019         /*
1020          * Make special raw floppy devices with preset types to
1021          * make formatting easier.  These override the disk management
1022          * layer for the whole-slice-disk for partitions 128-191.  Note
1023          * that we do not override partition 255, which is the
1024          * whole-slice-part.  If we did we would have to provide our
1025          * own DIOCGPART ioctl.
1026          */
1027         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 1),
1028                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1720", fd->fdu);
1029         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 2),
1030                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1480", fd->fdu);
1031         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 3),
1032                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1440", fd->fdu);
1033         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 4),
1034                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1200", fd->fdu);
1035         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 5),
1036                  UID_ROOT, GID_WHEEL, 0600, "fd%d.820", fd->fdu);
1037         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 6),
1038                  UID_ROOT, GID_WHEEL, 0600, "fd%d.800", fd->fdu);
1039         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 7),
1040                  UID_ROOT, GID_WHEEL, 0600, "fd%d.720", fd->fdu);
1041         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 8),
1042                  UID_ROOT, GID_WHEEL, 0600, "fd%d.360", fd->fdu);
1043         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 9),
1044                  UID_ROOT, GID_WHEEL, 0600, "fd%d.640", fd->fdu);
1045         make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 10),
1046                  UID_ROOT, GID_WHEEL, 0600, "fd%d.1232", fd->fdu);
1047
1048         devstat_add_entry(&fd->device_stats, device_get_name(dev),
1049                           device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
1050                           DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
1051                           DEVSTAT_PRIORITY_FD);
1052
1053         if (fd->type != NO_TYPE) {
1054                 bzero(&info, sizeof(info));
1055                 ft = &fd_types[fd->type - 1];
1056                 info.d_media_blksize = 128 << ft->secsize;
1057                 info.d_media_blocks = ft->size;
1058                 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1059                 info.d_nheads = ft->heads;
1060                 info.d_secpertrack = ft->sectrac;
1061                 info.d_secpercyl = ft->sectrac * ft->heads;
1062                 info.d_ncylinders = ft->size / info.d_secpercyl;
1063                 disk_setdiskinfo(&fd->disk, &info);
1064         }
1065         return (0);
1066 }
1067
1068 static int
1069 fd_detach(device_t dev)
1070 {
1071         struct  fd_data *fd;
1072
1073         fd = device_get_softc(dev);
1074         kprintf("devfs: Please make sure that only the right fd device was removed!!!\n");
1075         dev_ops_remove_minor(&fd_ops,
1076                          /*dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),*/
1077                          dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128));
1078         disk_invalidate(&fd->disk);
1079         disk_destroy(&fd->disk);
1080         devstat_remove_entry(&fd->device_stats);
1081         callout_stop(&fd->toffhandle);
1082         callout_stop(&fd->motor);
1083
1084         return (0);
1085 }
1086
1087 static device_method_t fd_methods[] = {
1088         /* Device interface */
1089         DEVMETHOD(device_probe,         fd_probe),
1090         DEVMETHOD(device_attach,        fd_attach),
1091         DEVMETHOD(device_detach,        fd_detach),
1092         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
1093         DEVMETHOD(device_suspend,       bus_generic_suspend), /* XXX */
1094         DEVMETHOD(device_resume,        bus_generic_resume), /* XXX */
1095
1096         { 0, 0 }
1097 };
1098
1099 static driver_t fd_driver = {
1100         "fd",
1101         fd_methods,
1102         sizeof(struct fd_data)
1103 };
1104
1105 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, NULL, NULL);
1106
1107 /****************************************************************************/
1108 /*                            motor control stuff                           */
1109 /*              remember to not deselect the drive we're working on         */
1110 /****************************************************************************/
1111 static void
1112 set_motor(struct fdc_data *fdc, int fdsu, int turnon)
1113 {
1114         int fdout = fdc->fdout;
1115         int needspecify = 0;
1116
1117         if(turnon) {
1118                 fdout &= ~FDO_FDSEL;
1119                 fdout |= (FDO_MOEN0 << fdsu) + fdsu;
1120         } else
1121                 fdout &= ~(FDO_MOEN0 << fdsu);
1122
1123         if(!turnon
1124            && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
1125                 /* gonna turn off the last drive, put FDC to bed */
1126                 fdout &= ~ (FDO_FRST|FDO_FDMAEN);
1127         else {
1128                 /* make sure controller is selected and specified */
1129                 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
1130                         needspecify = 1;
1131                 fdout |= (FDO_FRST|FDO_FDMAEN);
1132         }
1133
1134         fdout_wr(fdc, fdout);
1135         fdc->fdout = fdout;
1136         TRACE1("[0x%x->FDOUT]", fdout);
1137
1138         if (needspecify) {
1139                 /*
1140                  * XXX
1141                  * special case: since we have just woken up the FDC
1142                  * from its sleep, we silently assume the command will
1143                  * be accepted, and do not test for a timeout
1144                  */
1145                 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1146                              NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1147                              0);
1148                 if (fdc->flags & FDC_HAS_FIFO)
1149                         (void) enable_fifo(fdc);
1150         }
1151 }
1152
1153 static void
1154 fd_turnoff(void *xfd)
1155 {
1156         fd_p fd = xfd;
1157
1158         TRACE1("[fd%d: turnoff]", fd->fdu);
1159
1160         crit_enter();
1161         /*
1162          * Don't turn off the motor yet if the drive is active.
1163          *
1164          * If we got here, this could only mean we missed an interrupt.
1165          * This can e. g. happen on the Y-E Date PCMCIA floppy controller
1166          * after a controller reset.  Just schedule a pseudo-interrupt
1167          * so the state machine gets re-entered.
1168          */
1169         if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
1170                 fdc_intr(fd->fdc);
1171                 crit_exit();
1172                 return;
1173         }
1174
1175         fd->flags &= ~FD_MOTOR;
1176         set_motor(fd->fdc, fd->fdsu, TURNOFF);
1177         crit_exit();
1178 }
1179
1180 static void
1181 fd_motor_on(void *xfd)
1182 {
1183         fd_p fd = xfd;
1184
1185         crit_enter();
1186         fd->flags &= ~FD_MOTOR_WAIT;
1187         if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
1188         {
1189                 fdc_intr(fd->fdc);
1190         }
1191         crit_exit();
1192 }
1193
1194 static void
1195 fd_turnon(fd_p fd)
1196 {
1197         if(!(fd->flags & FD_MOTOR))
1198         {
1199                 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
1200                 set_motor(fd->fdc, fd->fdsu, TURNON);
1201                 callout_reset(&fd->motor, hz, fd_motor_on, fd);
1202         }
1203 }
1204
1205 static void
1206 fdc_reset(fdc_p fdc)
1207 {
1208         /* Try a reset, keep motor on */
1209         fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1210         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
1211         DELAY(100);
1212         /* enable FDC, but defer interrupts a moment */
1213         fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
1214         TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
1215         DELAY(100);
1216         fdout_wr(fdc, fdc->fdout);
1217         TRACE1("[0x%x->FDOUT]", fdc->fdout);
1218
1219         /* XXX after a reset, silently believe the FDC will accept commands */
1220         (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
1221                      NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
1222                      0);
1223         if (fdc->flags & FDC_HAS_FIFO)
1224                 (void) enable_fifo(fdc);
1225 }
1226
1227 /****************************************************************************/
1228 /*                             fdc in/out                                   */
1229 /****************************************************************************/
1230 /*
1231  * FDC IO functions, take care of the main status register, timeout
1232  * in case the desired status bits are never set.
1233  *
1234  * These PIO loops initially start out with short delays between
1235  * each iteration in the expectation that the required condition
1236  * is usually met quickly, so it can be handled immediately.  After
1237  * about 1 ms, stepping is increased to achieve a better timing
1238  * accuracy in the calls to DELAY().
1239  */
1240 static int
1241 fd_in(struct fdc_data *fdc, int *ptr)
1242 {
1243         int i, j, step;
1244
1245         for (j = 0, step = 1;
1246             (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
1247             j < FDSTS_TIMEOUT;
1248             j += step) {
1249                 if (i == NE7_RQM)
1250                         return (fdc_err(fdc, "ready for output in input\n"));
1251                 if (j == 1000)
1252                         step = 1000;
1253                 DELAY(step);
1254         }
1255         if (j >= FDSTS_TIMEOUT)
1256                 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
1257 #ifdef  FDC_DEBUG
1258         i = fddata_rd(fdc);
1259         TRACE1("[FDDATA->0x%x]", (unsigned char)i);
1260         *ptr = i;
1261         return (0);
1262 #else   /* !FDC_DEBUG */
1263         i = fddata_rd(fdc);
1264         if (ptr)
1265                 *ptr = i;
1266         return (0);
1267 #endif  /* FDC_DEBUG */
1268 }
1269
1270 static int
1271 out_fdc(struct fdc_data *fdc, int x)
1272 {
1273         int i, j, step;
1274
1275         for (j = 0, step = 1;
1276             (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
1277             j < FDSTS_TIMEOUT;
1278             j += step) {
1279                 if (i == (NE7_DIO|NE7_RQM))
1280                         return (fdc_err(fdc, "ready for input in output\n"));
1281                 if (j == 1000)
1282                         step = 1000;
1283                 DELAY(step);
1284         }
1285         if (j >= FDSTS_TIMEOUT)
1286                 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
1287
1288         /* Send the command and return */
1289         fddata_wr(fdc, x);
1290         TRACE1("[0x%x->FDDATA]", x);
1291         return (0);
1292 }
1293
1294 /****************************************************************************/
1295 /*                           fdopen/fdclose                                 */
1296 /****************************************************************************/
1297 int
1298 Fdopen(struct dev_open_args *ap)
1299 {
1300         cdev_t dev = ap->a_head.a_dev;
1301         fdu_t fdu = dkunit(dev);
1302         struct disk_info info;
1303         struct fd_type *ft;
1304         int     type;
1305         int     changetype;
1306         fd_p    fd;
1307         fdc_p   fdc;
1308
1309         /* check bounds */
1310         if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
1311                 return (ENXIO);
1312         fdc = fd->fdc;
1313         if ((fdc == NULL) || (fd->type == NO_TYPE))
1314                 return (ENXIO);
1315
1316         /*
1317          * Figure out the type of floppy.  There are special whole-disk-device
1318          * overrides that will override the current type.
1319          */
1320         type = dkpart(dev);
1321         if (type == WHOLE_SLICE_PART) {
1322                 type = fd->type;        /* do not change selected type data */
1323                 changetype = 0;
1324         } else if (type > 128) {
1325                 type -= 128;            /* set to specific format */
1326                 changetype = 1;
1327         } else {
1328                 type = fd->type;        /* reset to default */
1329                 changetype = 1;
1330         }
1331         if (type > NUMDENS)
1332                 return (ENXIO);
1333         if (type != fd->type) {
1334                 /*
1335                  * For each type of basic drive, make sure we are trying
1336                  * to open a type it can do,
1337                  */
1338                 switch (fd->type) {
1339                 case FD_360:
1340                         return (ENXIO);
1341                 case FD_720:
1342                         if (   type != FD_820
1343                             && type != FD_800
1344                             && type != FD_640
1345                            )
1346                                 return (ENXIO);
1347                         break;
1348                 case FD_1200:
1349                         switch (type) {
1350                         case FD_1480:
1351                                 type = FD_1480in5_25;
1352                                 break;
1353                         case FD_1440:
1354                                 type = FD_1440in5_25;
1355                                 break;
1356                         case FD_1232:
1357                                 break;
1358                         case FD_820:
1359                                 type = FD_820in5_25;
1360                                 break;
1361                         case FD_800:
1362                                 type = FD_800in5_25;
1363                                 break;
1364                         case FD_720:
1365                                 type = FD_720in5_25;
1366                                 break;
1367                         case FD_640:
1368                                 type = FD_640in5_25;
1369                                 break;
1370                         case FD_360:
1371                                 type = FD_360in5_25;
1372                                 break;
1373                         default:
1374                                 return(ENXIO);
1375                         }
1376                         break;
1377                 case FD_1440:
1378                         if (   type != FD_1720
1379                             && type != FD_1480
1380                             && type != FD_1200
1381                             && type != FD_820
1382                             && type != FD_800
1383                             && type != FD_720
1384                             && type != FD_640
1385                             )
1386                                 return(ENXIO);
1387                         break;
1388                 }
1389         }
1390
1391         /*
1392          * fd->type is the basic drive type, not the current format
1393          * we are reading.  We only change the type when opening the
1394          * whole-slice-partition
1395          */
1396         if (changetype)
1397                 fd->ft = fd_types[type - 1];
1398         fd->flags |= FD_OPEN;
1399
1400         /*
1401          * Clearing the DMA overrun counter at open time is a bit messy.
1402          * Since we're only managing one counter per controller, opening
1403          * the second drive could mess it up.  Anyway, if the DMA overrun
1404          * condition is really persistent, it will eventually time out
1405          * still.  OTOH, clearing it here will ensure we'll at least start
1406          * trying again after a previous (maybe even long ago) failure.
1407          * Also, this is merely a stop-gap measure only that should not
1408          * happen during normal operation, so we can tolerate it to be a
1409          * bit sloppy about this.
1410          */
1411         fdc->dma_overruns = 0;
1412
1413         /*
1414          * Set disk parameters for the disk management layer.
1415          *
1416          * Note that we do not set RAWEXTENSIONS here.  We override
1417          * the minor numbers in the raw-extension range and handle them
1418          * directly.
1419          */
1420         bzero(&info, sizeof(info));
1421         ft = &fd->ft;
1422         info.d_media_blksize = 128 << ft->secsize;
1423         info.d_media_blocks = ft->size;
1424         info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR;
1425         info.d_nheads = ft->heads;
1426         info.d_secpertrack = ft->sectrac;
1427         info.d_secpercyl = ft->sectrac * ft->heads;
1428         info.d_ncylinders = ft->size / info.d_secpercyl;
1429         disk_setdiskinfo(&fd->disk, &info);
1430
1431         return 0;
1432 }
1433
1434 int
1435 fdclose(struct dev_close_args *ap)
1436 {
1437         cdev_t dev = ap->a_head.a_dev;
1438         fdu_t fdu = dkunit(dev);
1439         struct fd_data *fd;
1440
1441         fd = devclass_get_softc(fd_devclass, fdu);
1442         fd->flags &= ~FD_OPEN;
1443         fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG);
1444
1445         return (0);
1446 }
1447
1448 /****************************************************************************/
1449 /*                               fdstrategy                                 */
1450 /****************************************************************************/
1451 int
1452 fdstrategy(struct dev_strategy_args *ap)
1453 {
1454         cdev_t dev = ap->a_head.a_dev;
1455         struct bio *bio = ap->a_bio;
1456         struct buf *bp = bio->bio_buf;
1457         unsigned nblocks, blknum, cando;
1458         fdu_t   fdu;
1459         fdc_p   fdc;
1460         fd_p    fd;
1461         size_t  fdblk;
1462
1463         fdu = dkunit(dev);
1464         fd = devclass_get_softc(fd_devclass, fdu);
1465         if (fd == 0)
1466                 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
1467                       (u_long)major(dev), (u_long)minor(dev));
1468         fdc = fd->fdc;
1469         if (fd->type == NO_TYPE) {
1470                 bp->b_error = ENXIO;
1471                 bp->b_flags |= B_ERROR;
1472                 goto bad;
1473         };
1474
1475         fdblk = 128 << (fd->ft.secsize);
1476         if (bp->b_cmd != BUF_CMD_FORMAT) {
1477                 if (bio->bio_offset < 0) {
1478                         kprintf(
1479                 "fd%d: fdstrat: bad request offset = %"PRId64", bcount = %d\n",
1480                                fdu, bio->bio_offset, bp->b_bcount);
1481                         bp->b_error = EINVAL;
1482                         bp->b_flags |= B_ERROR;
1483                         goto bad;
1484                 }
1485                 if ((bp->b_bcount % fdblk) != 0) {
1486                         bp->b_error = EINVAL;
1487                         bp->b_flags |= B_ERROR;
1488                         goto bad;
1489                 }
1490         }
1491
1492         /*
1493          * Set up block calculations.
1494          */
1495         if (bio->bio_offset > 20000000LL * fdblk) {
1496                 /*
1497                  * Reject unreasonably high block number, prevent the
1498                  * multiplication below from overflowing.
1499                  */
1500                 bp->b_error = EINVAL;
1501                 bp->b_flags |= B_ERROR;
1502                 goto bad;
1503         }
1504         blknum = (unsigned)(bio->bio_offset / fdblk);
1505         nblocks = fd->ft.size;
1506         bp->b_resid = 0;
1507         if (blknum + (bp->b_bcount / fdblk) > nblocks) {
1508                 if (blknum <= nblocks) {
1509                         cando = (nblocks - blknum) * fdblk;
1510                         bp->b_resid = bp->b_bcount - cando;
1511                         if (cando == 0)
1512                                 goto bad;       /* not actually bad but EOF */
1513                 } else {
1514                         bp->b_error = EINVAL;
1515                         bp->b_flags |= B_ERROR;
1516                         goto bad;
1517                 }
1518         }
1519         crit_enter();
1520         bio->bio_driver_info = dev;
1521         bioqdisksort(&fdc->bio_queue, bio);
1522         callout_stop(&fd->toffhandle);
1523
1524         /* Tell devstat we are starting on the transaction */
1525         devstat_start_transaction(&fd->device_stats);
1526 #if 0
1527         device_busy(fd->dev);
1528 #endif
1529         fdstart(fdc);
1530         crit_exit();
1531         return(0);
1532
1533 bad:
1534         biodone(bio);
1535         return(0);
1536 }
1537
1538 /***************************************************************\
1539 *                               fdstart                         *
1540 * We have just queued something.. if the controller is not busy *
1541 * then simulate the case where it has just finished a command   *
1542 * So that it (the interrupt routine) looks on the queue for more*
1543 * work to do and picks up what we just added.                   *
1544 * If the controller is already busy, we need do nothing, as it  *
1545 * will pick up our work when the present work completes         *
1546 \***************************************************************/
1547 static void
1548 fdstart(struct fdc_data *fdc)
1549 {
1550         crit_enter();
1551         if(fdc->state == DEVIDLE)
1552         {
1553                 fdc_intr(fdc);
1554         }
1555         crit_exit();
1556 }
1557
1558 static void
1559 fd_iotimeout(void *xfdc)
1560 {
1561         fdc_p fdc;
1562
1563         fdc = xfdc;
1564         TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
1565
1566         /*
1567          * Due to IBM's brain-dead design, the FDC has a faked ready
1568          * signal, hardwired to ready == true. Thus, any command
1569          * issued if there's no diskette in the drive will _never_
1570          * complete, and must be aborted by resetting the FDC.
1571          * Many thanks, Big Blue!
1572          * The FDC must not be reset directly, since that would
1573          * interfere with the state machine.  Instead, pretend that
1574          * the command completed but was invalid.  The state machine
1575          * will reset the FDC and retry once.
1576          */
1577         crit_enter();
1578         fdc->status[0] = NE7_ST0_IC_IV;
1579         fdc->flags &= ~FDC_STAT_VALID;
1580         fdc->state = IOTIMEDOUT;
1581         fdc_intr(fdc);
1582         crit_exit();
1583 }
1584
1585 /* just ensure it is running in a critical section */
1586 static void
1587 fd_pseudointr(void *xfdc)
1588 {
1589         crit_enter();
1590         fdc_intr(xfdc);
1591         crit_exit();
1592 }
1593
1594 /***********************************************************************\
1595 *                                 fdintr                                *
1596 * keep calling the state machine until it returns a 0                   *
1597 * ALWAYS called at SPLBIO                                               *
1598 \***********************************************************************/
1599 static void
1600 fdc_intr(void *xfdc)
1601 {
1602         fdc_p fdc = xfdc;
1603         while(fdstate(fdc))
1604                 ;
1605 }
1606
1607 /*
1608  * magic pseudo-DMA initialization for YE FDC. Sets count and
1609  * direction
1610  */
1611 #define SET_BCDR(fdc,wr,cnt,port) \
1612         bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port,  \
1613             ((cnt)-1) & 0xff);                                           \
1614         bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
1615             ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
1616
1617 /*
1618  * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
1619  */
1620 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count)
1621 {
1622         u_char *cptr = (u_char *)addr;
1623
1624         if (cmd == BUF_CMD_READ) {
1625                 if (fdc->state != PIOREAD) {
1626                         fdc->state = PIOREAD;
1627                         return(0);
1628                 };
1629                 SET_BCDR(fdc, 0, count, 0);
1630                 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1631                     FDC_YE_DATAPORT, cptr, count);
1632         } else {
1633                 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
1634                     FDC_YE_DATAPORT, cptr, count);
1635                 SET_BCDR(fdc, 0, count, 0);
1636         };
1637         return(1);
1638 }
1639
1640 /***********************************************************************\
1641 * The controller state machine.                                         *
1642 * if it returns a non zero value, it should be called again immediatly  *
1643 \***********************************************************************/
1644 static int
1645 fdstate(fdc_p fdc)
1646 {
1647         int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
1648         unsigned blknum = 0, b_cylinder = 0;
1649         fdu_t fdu;
1650         fd_p fd;
1651         struct bio *bio;
1652         struct buf *bp;
1653         struct fd_formb *finfo = NULL;
1654         size_t fdblk;
1655         cdev_t dev;
1656
1657         bio = fdc->bio;
1658         if (bio == NULL) {
1659                 bio = bioq_first(&fdc->bio_queue);
1660                 if (bio != NULL) {
1661                         bioq_remove(&fdc->bio_queue, bio);
1662                         fdc->bio = bio;
1663                 }
1664         }
1665         if (bio == NULL) {
1666                 /***********************************************\
1667                 * nothing left for this controller to do        *
1668                 * Force into the IDLE state,                    *
1669                 \***********************************************/
1670                 fdc->state = DEVIDLE;
1671                 if (fdc->fd) {
1672                         device_printf(fdc->fdc_dev,
1673                             "unexpected valid fd pointer\n");
1674                         fdc->fd = (fd_p) 0;
1675                         fdc->fdu = -1;
1676                 }
1677                 TRACE1("[fdc%d IDLE]", fdc->fdcu);
1678                 return (0);
1679         }
1680         bp = bio->bio_buf;
1681         dev = bio->bio_driver_info;
1682
1683         fdu = dkunit(dev);
1684         fd = devclass_get_softc(fd_devclass, fdu);
1685         fdblk = 128 << fd->ft.secsize;
1686         if (fdc->fd && (fd != fdc->fd))
1687                 device_printf(fd->dev, "confused fd pointers\n");
1688         read = (bp->b_cmd == BUF_CMD_READ);
1689         format = (bp->b_cmd == BUF_CMD_FORMAT);
1690         if (format) {
1691                 finfo = (struct fd_formb *)bp->b_data;
1692                 fd->skip = (char *)&(finfo->fd_formb_cylno(0))
1693                         - (char *)finfo;
1694         }
1695         if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
1696                 blknum = (unsigned)(bio->bio_offset / fdblk) +
1697                          fd->skip  /fdblk;
1698                 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads);
1699         }
1700         TRACE1("fd%d", fdu);
1701         TRACE1("[%s]", fdstates[fdc->state]);
1702         TRACE1("(0x%x)", fd->flags);
1703         callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
1704         switch (fdc->state)
1705         {
1706         case DEVIDLE:
1707         case FINDWORK:  /* we have found new work */
1708                 fdc->retry = 0;
1709                 fd->skip = 0;
1710                 fdc->fd = fd;
1711                 fdc->fdu = fdu;
1712                 fdc->fdctl_wr(fdc, fd->ft.trans);
1713                 TRACE1("[0x%x->FDCTL]", fd->ft.trans);
1714                 /*******************************************************\
1715                 * If the next drive has a motor startup pending, then   *
1716                 * it will start up in its own good time         *
1717                 \*******************************************************/
1718                 if(fd->flags & FD_MOTOR_WAIT) {
1719                         fdc->state = MOTORWAIT;
1720                         return (0); /* come back later */
1721                 }
1722                 /*******************************************************\
1723                 * Maybe if it's not starting, it SHOULD be starting     *
1724                 \*******************************************************/
1725                 if (!(fd->flags & FD_MOTOR))
1726                 {
1727                         fdc->state = MOTORWAIT;
1728                         fd_turnon(fd);
1729                         return (0);
1730                 }
1731                 else    /* at least make sure we are selected */
1732                 {
1733                         set_motor(fdc, fd->fdsu, TURNON);
1734                 }
1735                 if (fdc->flags & FDC_NEEDS_RESET) {
1736                         fdc->state = RESETCTLR;
1737                         fdc->flags &= ~FDC_NEEDS_RESET;
1738                 } else
1739                         fdc->state = DOSEEK;
1740                 break;
1741         case DOSEEK:
1742                 if (b_cylinder == (unsigned)fd->track)
1743                 {
1744                         fdc->state = SEEKCOMPLETE;
1745                         break;
1746                 }
1747                 if (fd_cmd(fdc, 3, NE7CMD_SEEK,
1748                            fd->fdsu, b_cylinder * fd->ft.steptrac,
1749                            0))
1750                 {
1751                         /*
1752                          * seek command not accepted, looks like
1753                          * the FDC went off to the Saints...
1754                          */
1755                         fdc->retry = 6; /* try a reset */
1756                         return(retrier(fdc));
1757                 }
1758                 fd->track = FD_NO_TRACK;
1759                 fdc->state = SEEKWAIT;
1760                 return(0);      /* will return later */
1761         case SEEKWAIT:
1762                 /* allow heads to settle */
1763                 callout_reset(&fdc->pseudointr_ch, hz / 16,
1764                                fd_pseudointr, fdc);
1765                 fdc->state = SEEKCOMPLETE;
1766                 return(0);      /* will return later */
1767         case SEEKCOMPLETE : /* SEEK DONE, START DMA */
1768                 /* Make sure seek really happened*/
1769                 if(fd->track == FD_NO_TRACK) {
1770                         int descyl = b_cylinder * fd->ft.steptrac;
1771                         do {
1772                                 /*
1773                                  * This might be a "ready changed" interrupt,
1774                                  * which cannot really happen since the
1775                                  * RDY pin is hardwired to + 5 volts.  This
1776                                  * generally indicates a "bouncing" intr
1777                                  * line, so do one of the following:
1778                                  *
1779                                  * When running on an enhanced FDC that is
1780                                  * known to not go stuck after responding
1781                                  * with INVALID, fetch all interrupt states
1782                                  * until seeing either an INVALID or a
1783                                  * real interrupt condition.
1784                                  *
1785                                  * When running on a dumb old NE765, give
1786                                  * up immediately.  The controller will
1787                                  * provide up to four dummy RC interrupt
1788                                  * conditions right after reset (for the
1789                                  * corresponding four drives), so this is
1790                                  * our only chance to get notice that it
1791                                  * was not the FDC that caused the interrupt.
1792                                  */
1793                                 if (fd_sense_int(fdc, &st0, &cyl)
1794                                     == FD_NOT_VALID)
1795                                         return 0;
1796                                 if(fdc->fdct == FDC_NE765
1797                                    && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
1798                                         return 0; /* hope for a real intr */
1799                         } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
1800
1801                         if (0 == descyl) {
1802                                 int failed = 0;
1803                                 /*
1804                                  * seek to cyl 0 requested; make sure we are
1805                                  * really there
1806                                  */
1807                                 if (fd_sense_drive_status(fdc, &st3))
1808                                         failed = 1;
1809                                 if ((st3 & NE7_ST3_T0) == 0) {
1810                                         kprintf(
1811                 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
1812                                                fdu, st3, NE7_ST3BITS);
1813                                         failed = 1;
1814                                 }
1815
1816                                 if (failed) {
1817                                         if(fdc->retry < 3)
1818                                                 fdc->retry = 3;
1819                                         return (retrier(fdc));
1820                                 }
1821                         }
1822
1823                         if (cyl != descyl) {
1824                                 kprintf(
1825                 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
1826                                        fdu, descyl, cyl, st0);
1827                                 if (fdc->retry < 3)
1828                                         fdc->retry = 3;
1829                                 return (retrier(fdc));
1830                         }
1831                 }
1832
1833                 fd->track = b_cylinder;
1834                 if (!(fdc->flags & FDC_NODMA)) {
1835                         isa_dmastart(isa_dmabp(bp),
1836                                      bp->b_data+fd->skip,
1837                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
1838                 }
1839                 sectrac = fd->ft.sectrac;
1840                 sec = blknum %  (sectrac * fd->ft.heads);
1841                 head = sec / sectrac;
1842                 sec = sec % sectrac + 1;
1843                 fd->hddrv = ((head&1)<<2)+fdu;
1844
1845                 if(format || !read)
1846                 {
1847                         /* make sure the drive is writable */
1848                         if(fd_sense_drive_status(fdc, &st3) != 0)
1849                         {
1850                                 /* stuck controller? */
1851                                 if (!(fdc->flags & FDC_NODMA))
1852                                         isa_dmadone(isa_dmabp(bp),
1853                                                     bp->b_data + fd->skip,
1854                                                     format ? bp->b_bcount : fdblk,
1855                                                     fdc->dmachan);
1856                                 fdc->retry = 6; /* reset the beast */
1857                                 return (retrier(fdc));
1858                         }
1859                         if(st3 & NE7_ST3_WP)
1860                         {
1861                                 /*
1862                                  * XXX YES! this is ugly.
1863                                  * in order to force the current operation
1864                                  * to fail, we will have to fake an FDC
1865                                  * error - all error handling is done
1866                                  * by the retrier()
1867                                  */
1868                                 fdc->status[0] = NE7_ST0_IC_AT;
1869                                 fdc->status[1] = NE7_ST1_NW;
1870                                 fdc->status[2] = 0;
1871                                 fdc->status[3] = fd->track;
1872                                 fdc->status[4] = head;
1873                                 fdc->status[5] = sec;
1874                                 fdc->retry = 8; /* break out immediately */
1875                                 fdc->state = IOTIMEDOUT; /* not really... */
1876                                 return (1);
1877                         }
1878                 }
1879
1880                 if (format) {
1881                         if (fdc->flags & FDC_NODMA) {
1882                                 /*
1883                                  * This seems to be necessary for
1884                                  * whatever obscure reason; if we omit
1885                                  * it, we end up filling the sector ID
1886                                  * fields of the newly formatted track
1887                                  * entirely with garbage, causing
1888                                  * `wrong cylinder' errors all over
1889                                  * the place when trying to read them
1890                                  * back.
1891                                  *
1892                                  * Umpf.
1893                                  */
1894                                 SET_BCDR(fdc, 1, bp->b_bcount, 0);
1895
1896                                 (void)fdcpio(fdc,bp->b_cmd,
1897                                         bp->b_data+fd->skip,
1898                                         bp->b_bcount);
1899
1900                         }
1901                         /* formatting */
1902                         if(fd_cmd(fdc, 6,  NE7CMD_FORMAT, head << 2 | fdu,
1903                                   finfo->fd_formb_secshift,
1904                                   finfo->fd_formb_nsecs,
1905                                   finfo->fd_formb_gaplen,
1906                                   finfo->fd_formb_fillbyte, 0)) {
1907                                 /* controller fell over */
1908                                 if (!(fdc->flags & FDC_NODMA))
1909                                         isa_dmadone(isa_dmabp(bp),
1910                                                     bp->b_data + fd->skip,
1911                                                     format ? bp->b_bcount : fdblk,
1912                                                     fdc->dmachan);
1913                                 fdc->retry = 6;
1914                                 return (retrier(fdc));
1915                         }
1916                 } else {
1917                         if (fdc->flags & FDC_NODMA) {
1918                                 /*
1919                                  * this seems to be necessary even when
1920                                  * reading data
1921                                  */
1922                                 SET_BCDR(fdc, 1, fdblk, 0);
1923
1924                                 /*
1925                                  * perform the write pseudo-DMA before
1926                                  * the WRITE command is sent
1927                                  */
1928                                 if (!read)
1929                                         (void)fdcpio(fdc,bp->b_cmd,
1930                                             bp->b_data+fd->skip,
1931                                             fdblk);
1932                         }
1933                         if (fd_cmd(fdc, 9,
1934                                    (read ? NE7CMD_READ : NE7CMD_WRITE),
1935                                    head << 2 | fdu,  /* head & unit */
1936                                    fd->track,        /* track */
1937                                    head,
1938                                    sec,              /* sector + 1 */
1939                                    fd->ft.secsize,   /* sector size */
1940                                    sectrac,          /* sectors/track */
1941                                    fd->ft.gap,       /* gap size */
1942                                    fd->ft.datalen,   /* data length */
1943                                    0)) {
1944                                 /* the beast is sleeping again */
1945                                 if (!(fdc->flags & FDC_NODMA))
1946                                         isa_dmadone(isa_dmabp(bp),
1947                                                     bp->b_data + fd->skip,
1948                                                     format ? bp->b_bcount : fdblk,
1949                                                     fdc->dmachan);
1950                                 fdc->retry = 6;
1951                                 return (retrier(fdc));
1952                         }
1953                 }
1954                 if (fdc->flags & FDC_NODMA)
1955                         /*
1956                          * if this is a read, then simply await interrupt
1957                          * before performing PIO
1958                          */
1959                         if (read && !fdcpio(fdc,bp->b_cmd,
1960                             bp->b_data+fd->skip,fdblk)) {
1961                                 callout_reset(&fd->tohandle, hz,
1962                                                 fd_iotimeout, fdc);
1963                                 return(0);      /* will return later */
1964                         };
1965
1966                 /*
1967                  * write (or format) operation will fall through and
1968                  * await completion interrupt
1969                  */
1970                 fdc->state = IOCOMPLETE;
1971                 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc);
1972                 return (0);     /* will return later */
1973         case PIOREAD:
1974                 /*
1975                  * actually perform the PIO read.  The IOCOMPLETE case
1976                  * removes the timeout for us.
1977                  */
1978                 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk);
1979                 fdc->state = IOCOMPLETE;
1980                 /* FALLTHROUGH */
1981         case IOCOMPLETE: /* IO DONE, post-analyze */
1982                 callout_stop(&fd->tohandle);
1983
1984                 if (fd_read_status(fdc, fd->fdsu)) {
1985                         if (!(fdc->flags & FDC_NODMA)) {
1986                                 isa_dmadone(isa_dmabp(bp),
1987                                             bp->b_data + fd->skip,
1988                                             format ? bp->b_bcount : fdblk,
1989                                             fdc->dmachan);
1990                         }
1991                         if (fdc->retry < 6)
1992                                 fdc->retry = 6; /* force a reset */
1993                         return (retrier(fdc));
1994                 }
1995
1996                 fdc->state = IOTIMEDOUT;
1997
1998                 /* FALLTHROUGH */
1999
2000         case IOTIMEDOUT:
2001                 if (!(fdc->flags & FDC_NODMA)) {
2002                         isa_dmadone(isa_dmabp(bp),
2003                                     bp->b_data + fd->skip,
2004                                 format ? bp->b_bcount : fdblk, fdc->dmachan);
2005                 }
2006                 if (fdc->status[0] & NE7_ST0_IC) {
2007                         if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2008                             && fdc->status[1] & NE7_ST1_OR) {
2009                                 /*
2010                                  * DMA overrun. Someone hogged the bus and
2011                                  * didn't release it in time for the next
2012                                  * FDC transfer.
2013                                  *
2014                                  * We normally restart this without bumping
2015                                  * the retry counter.  However, in case
2016                                  * something is seriously messed up (like
2017                                  * broken hardware), we rather limit the
2018                                  * number of retries so the IO operation
2019                                  * doesn't block indefinately.
2020                                  */
2021                                 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
2022                                         fdc->state = SEEKCOMPLETE;
2023                                         return (1);
2024                                 } /* else fall through */
2025                         }
2026                         if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
2027                                 && fdc->retry < 6)
2028                                 fdc->retry = 6; /* force a reset */
2029                         else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
2030                                 && fdc->status[2] & NE7_ST2_WC
2031                                 && fdc->retry < 3)
2032                                 fdc->retry = 3; /* force recalibrate */
2033                         return (retrier(fdc));
2034                 }
2035                 /* All OK */
2036                 /* Operation successful, retry DMA overruns again next time. */
2037                 fdc->dma_overruns = 0;
2038                 fd->skip += fdblk;
2039                 if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
2040                         /* set up next transfer */
2041                         fdc->state = DOSEEK;
2042                 } else {
2043                         /* ALL DONE */
2044                         fd->skip = 0;
2045                         fdc->bio = NULL;
2046 #if 0
2047                         device_unbusy(fd->dev);
2048 #endif
2049                         devstat_end_transaction_buf(&fd->device_stats, bp);
2050                         biodone(bio);
2051                         fdc->fd = (fd_p) 0;
2052                         fdc->fdu = -1;
2053                         fdc->state = FINDWORK;
2054                 }
2055                 return (1);
2056         case RESETCTLR:
2057                 fdc_reset(fdc);
2058                 fdc->retry++;
2059                 fdc->state = RESETCOMPLETE;
2060                 return (0);
2061         case RESETCOMPLETE:
2062                 /*
2063                  * Discard all the results from the reset so that they
2064                  * can't cause an unexpected interrupt later.
2065                  */
2066                 for (i = 0; i < 4; i++)
2067                         (void)fd_sense_int(fdc, &st0, &cyl);
2068                 fdc->state = STARTRECAL;
2069                 /* Fall through. */
2070         case STARTRECAL:
2071                 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
2072                         /* arrgl */
2073                         fdc->retry = 6;
2074                         return (retrier(fdc));
2075                 }
2076                 fdc->state = RECALWAIT;
2077                 return (0);     /* will return later */
2078         case RECALWAIT:
2079                 /* allow heads to settle */
2080                 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc);
2081                 fdc->state = RECALCOMPLETE;
2082                 return (0);     /* will return later */
2083         case RECALCOMPLETE:
2084                 do {
2085                         /*
2086                          * See SEEKCOMPLETE for a comment on this:
2087                          */
2088                         if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
2089                                 return 0;
2090                         if(fdc->fdct == FDC_NE765
2091                            && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
2092                                 return 0; /* hope for a real intr */
2093                 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
2094                 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
2095                 {
2096                         if(fdc->retry > 3)
2097                                 /*
2098                                  * a recalibrate from beyond cylinder 77
2099                                  * will "fail" due to the FDC limitations;
2100                                  * since people used to complain much about
2101                                  * the failure message, try not logging
2102                                  * this one if it seems to be the first
2103                                  * time in a line
2104                                  */
2105                                 kprintf("fd%d: recal failed ST0 %b cyl %d\n",
2106                                        fdu, st0, NE7_ST0BITS, cyl);
2107                         if(fdc->retry < 3) fdc->retry = 3;
2108                         return (retrier(fdc));
2109                 }
2110                 fd->track = 0;
2111                 /* Seek (probably) necessary */
2112                 fdc->state = DOSEEK;
2113                 return (1);     /* will return immediatly */
2114         case MOTORWAIT:
2115                 if(fd->flags & FD_MOTOR_WAIT)
2116                 {
2117                         return (0); /* time's not up yet */
2118                 }
2119                 if (fdc->flags & FDC_NEEDS_RESET) {
2120                         fdc->state = RESETCTLR;
2121                         fdc->flags &= ~FDC_NEEDS_RESET;
2122                 } else {
2123                         /*
2124                          * If all motors were off, then the controller was
2125                          * reset, so it has lost track of the current
2126                          * cylinder.  Recalibrate to handle this case.
2127                          * But first, discard the results of the reset.
2128                          */
2129                         fdc->state = RESETCOMPLETE;
2130                 }
2131                 return (1);     /* will return immediatly */
2132         default:
2133                 device_printf(fdc->fdc_dev, "unexpected FD int->");
2134                 if (fd_read_status(fdc, fd->fdsu) == 0)
2135                         kprintf("FDC status :%x %x %x %x %x %x %x   ",
2136                                fdc->status[0],
2137                                fdc->status[1],
2138                                fdc->status[2],
2139                                fdc->status[3],
2140                                fdc->status[4],
2141                                fdc->status[5],
2142                                fdc->status[6] );
2143                 else
2144                         kprintf("No status available   ");
2145                 if (fd_sense_int(fdc, &st0, &cyl) != 0)
2146                 {
2147                         kprintf("[controller is dead now]\n");
2148                         return (0);
2149                 }
2150                 kprintf("ST0 = %x, PCN = %x\n", st0, cyl);
2151                 return (0);
2152         }
2153         /*XXX confusing: some branches return immediately, others end up here*/
2154         return (1); /* Come back immediatly to new state */
2155 }
2156
2157 static int
2158 retrier(struct fdc_data *fdc)
2159 {
2160         struct bio *bio;
2161         struct buf *bp;
2162         struct fd_data *fd;
2163         cdev_t dev;
2164         int fdu;
2165
2166         bio = fdc->bio;
2167         bp = bio->bio_buf;
2168         dev = bio->bio_driver_info;
2169
2170         /* XXX shouldn't this be cached somewhere?  */
2171         fdu = dkunit(dev);
2172         fd = devclass_get_softc(fd_devclass, fdu);
2173         if (fd->options & FDOPT_NORETRY)
2174                 goto fail;
2175
2176         switch (fdc->retry) {
2177         case 0: case 1: case 2:
2178                 fdc->state = SEEKCOMPLETE;
2179                 break;
2180         case 3: case 4: case 5:
2181                 fdc->state = STARTRECAL;
2182                 break;
2183         case 6:
2184                 fdc->state = RESETCTLR;
2185                 break;
2186         case 7:
2187                 break;
2188         default:
2189         fail:
2190                 {
2191                         int printerror = (fd->options & FDOPT_NOERRLOG) == 0;
2192
2193                         if (printerror) {
2194                                 /*
2195                                  * note: use the correct device for more
2196                                  * verbose error reporting.
2197                                  */
2198                                 diskerr(bio, dev,
2199                                         "hard error", LOG_PRINTF,
2200                                         fdc->fd->skip);
2201                         }
2202                         if (printerror) {
2203                                 if (fdc->flags & FDC_STAT_VALID)
2204                                         kprintf(
2205                         " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
2206                                                fdc->status[0], NE7_ST0BITS,
2207                                                fdc->status[1], NE7_ST1BITS,
2208                                                fdc->status[2], NE7_ST2BITS,
2209                                                fdc->status[3], fdc->status[4],
2210                                                fdc->status[5]);
2211                                 else
2212                                         kprintf(" (No status)\n");
2213                         }
2214                 }
2215                 bp->b_flags |= B_ERROR;
2216                 bp->b_error = EIO;
2217                 bp->b_resid += bp->b_bcount - fdc->fd->skip;
2218                 fdc->bio = NULL;
2219                 fdc->fd->skip = 0;
2220 #if 0
2221                 device_unbusy(fd->dev);
2222 #endif
2223                 devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
2224                 biodone(bio);
2225                 fdc->state = FINDWORK;
2226                 fdc->flags |= FDC_NEEDS_RESET;
2227                 fdc->fd = (fd_p) 0;
2228                 fdc->fdu = -1;
2229                 return (1);
2230         }
2231         fdc->retry++;
2232         return (1);
2233 }
2234
2235 static int
2236 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred)
2237 {
2238         fdu_t   fdu;
2239         fd_p    fd;
2240         struct buf *bp;
2241         int rv = 0;
2242         size_t fdblk;
2243
2244         fdu     = dkunit(dev);
2245         fd      = devclass_get_softc(fd_devclass, fdu);
2246         fdblk = 128 << fd->ft.secsize;
2247
2248         /* set up a buffer header for fdstrategy() */
2249         bp = getpbuf(NULL);
2250         bp->b_cmd = BUF_CMD_FORMAT;
2251
2252         /*
2253          * calculate a fake blkno, so fdstrategy() would initiate a
2254          * seek to the requested cylinder
2255          */
2256         bp->b_bio1.bio_offset = (off_t)(finfo->cyl *
2257                 (fd->ft.sectrac * fd->ft.heads)
2258                 + finfo->head * fd->ft.sectrac) * fdblk;
2259         bp->b_bio1.bio_driver_info = dev;
2260         bp->b_bio1.bio_flags |= BIO_SYNC;
2261         bp->b_bio1.bio_done = biodone_sync;
2262
2263         bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
2264         bp->b_data = (caddr_t)finfo;
2265
2266         /* now do the format */
2267         dev_dstrategy(dev, &bp->b_bio1);
2268
2269         /* ...and wait for it to complete */
2270         rv = biowait_timeout(&bp->b_bio1, "fdform", 20 * hz);
2271         if (rv == EWOULDBLOCK) {
2272                 /* timed out */
2273                 rv = EIO;
2274 #if 0
2275                 device_unbusy(fd->dev);
2276 #endif
2277                 biodone(&bp->b_bio1);
2278         }
2279         if (bp->b_flags & B_ERROR)
2280                 rv = bp->b_error;
2281         /*
2282          * allow the process to be swapped
2283          */
2284         relpbuf(bp, NULL);
2285         return rv;
2286 }
2287
2288 /*
2289  * TODO: don't allocate buffer on stack.
2290  */
2291
2292 static int
2293 fdioctl(struct dev_ioctl_args *ap)
2294 {
2295         cdev_t dev = ap->a_head.a_dev;
2296         fdu_t   fdu = dkunit(dev);
2297         fd_p    fd = devclass_get_softc(fd_devclass, fdu);
2298         struct fdc_status *fsp;
2299         int error = 0;
2300
2301         switch (ap->a_cmd) {
2302         case FD_FORM:
2303                 if ((ap->a_fflag & FWRITE) == 0)
2304                         error = EBADF;  /* must be opened for writing */
2305                 else if (((struct fd_formb *)ap->a_data)->format_version !=
2306                         FD_FORMAT_VERSION)
2307                         error = EINVAL; /* wrong version of formatting prog */
2308                 else
2309                         error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred);
2310                 break;
2311
2312         case FD_GTYPE:                  /* get drive type */
2313                 *(struct fd_type *)ap->a_data = fd->ft;
2314                 break;
2315
2316         case FD_STYPE:                  /* set drive type */
2317                 /* this is considered harmful; only allow for superuser */
2318                 if (priv_check_cred(ap->a_cred, PRIV_ROOT, 0) != 0)
2319                         return EPERM;
2320                 fd->ft = *(struct fd_type *)ap->a_data;
2321                 break;
2322
2323         case FD_GOPTS:                  /* get drive options */
2324                 *(int *)ap->a_data = fd->options;
2325                 break;
2326
2327         case FD_SOPTS:                  /* set drive options */
2328                 fd->options = *(int *)ap->a_data;
2329                 break;
2330
2331         case FD_GSTAT:
2332                 fsp = (struct fdc_status *)ap->a_data;
2333                 if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
2334                         return EINVAL;
2335                 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
2336                 break;
2337
2338         default:
2339                 error = ENOTTY;
2340                 break;
2341         }
2342         return (error);
2343 }
2344
2345 /*
2346  * Hello emacs, these are the
2347  * Local Variables:
2348  *  c-indent-level:               8
2349  *  c-continued-statement-offset: 8
2350  *  c-continued-brace-offset:     0
2351  *  c-brace-offset:              -8
2352  *  c-brace-imaginary-offset:     0
2353  *  c-argdecl-indent:             8
2354  *  c-label-offset:              -8
2355  *  c++-hanging-braces:           1
2356  *  c++-access-specifier-offset: -8
2357  *  c++-empty-arglist-indent:     8
2358  *  c++-friend-offset:            0
2359  * End:
2360  */