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.heep.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 * $FreeBSD$ 54 */ 55 56 #include "opt_fdc.h" 57 #include "card.h" 58 59 #include <sys/param.h> 60 #include <sys/systm.h> 61 #include <sys/bio.h> 62 #include <sys/bus.h> 63 #include <sys/conf.h> 64 #include <sys/devicestat.h> 65 #include <sys/disk.h> 66 #include <sys/fcntl.h> 67 #include <sys/fdcio.h> 68 #include <sys/filio.h> 69 #include <sys/kernel.h> 70 #include <sys/lock.h> 71 #include <sys/malloc.h> 72 #include <sys/module.h> 73 #include <sys/mutex.h> 74 #include <sys/proc.h> 75 #include <sys/syslog.h> 76 77 #include <machine/bus.h> 78 #include <sys/rman.h> 79 80 #include <machine/clock.h> 81 #include <machine/resource.h> 82 #include <machine/stdarg.h> 83 84 #include <isa/isavar.h> 85 #include <isa/isareg.h> 86 #include <isa/fdreg.h> 87 #include <isa/rtc.h> 88 89 enum fdc_type 90 { 91 FDC_NE765, FDC_ENHANCED, FDC_UNKNOWN = -1 92 }; 93 94 enum fdc_states { 95 DEVIDLE, 96 FINDWORK, 97 DOSEEK, 98 SEEKCOMPLETE , 99 IOCOMPLETE, 100 RECALCOMPLETE, 101 STARTRECAL, 102 RESETCTLR, 103 SEEKWAIT, 104 RECALWAIT, 105 MOTORWAIT, 106 IOTIMEDOUT, 107 RESETCOMPLETE, 108 PIOREAD 109 }; 110 111 #ifdef FDC_DEBUG 112 static char const * const fdstates[] = { 113 "DEVIDLE", 114 "FINDWORK", 115 "DOSEEK", 116 "SEEKCOMPLETE", 117 "IOCOMPLETE", 118 "RECALCOMPLETE", 119 "STARTRECAL", 120 "RESETCTLR", 121 "SEEKWAIT", 122 "RECALWAIT", 123 "MOTORWAIT", 124 "IOTIMEDOUT", 125 "RESETCOMPLETE", 126 "PIOREAD" 127 }; 128 #endif 129 130 /* 131 * Per controller structure (softc). 132 */ 133 struct fdc_data 134 { 135 int fdcu; /* our unit number */ 136 int dmachan; 137 int flags; 138 #define FDC_ATTACHED 0x01 139 #define FDC_STAT_VALID 0x08 140 #define FDC_HAS_FIFO 0x10 141 #define FDC_NEEDS_RESET 0x20 142 #define FDC_NODMA 0x40 143 #define FDC_ISPNP 0x80 144 #define FDC_ISPCMCIA 0x100 145 struct fd_data *fd; 146 int fdu; /* the active drive */ 147 enum fdc_states state; 148 int retry; 149 int fdout; /* mirror of the w/o digital output reg */ 150 u_int status[7]; /* copy of the registers */ 151 enum fdc_type fdct; /* chip version of FDC */ 152 int fdc_errs; /* number of logged errors */ 153 int dma_overruns; /* number of DMA overruns */ 154 struct bio_queue_head head; 155 struct bio *bp; /* active buffer */ 156 struct resource *res_ioport, *res_ctl, *res_irq, *res_drq; 157 int rid_ioport, rid_ctl, rid_irq, rid_drq; 158 int port_off; 159 bus_space_tag_t portt; 160 bus_space_handle_t porth; 161 bus_space_tag_t ctlt; 162 bus_space_handle_t ctlh; 163 void *fdc_intr; 164 struct device *fdc_dev; 165 void (*fdctl_wr)(struct fdc_data *fdc, u_int8_t v); 166 }; 167 168 #define FDBIO_FORMAT BIO_CMD2 169 170 typedef int fdu_t; 171 typedef int fdcu_t; 172 typedef int fdsu_t; 173 typedef struct fd_data *fd_p; 174 typedef struct fdc_data *fdc_p; 175 typedef enum fdc_type fdc_t; 176 177 #define FDUNIT(s) (((s) >> 6) & 3) 178 #define FDNUMTOUNIT(n) (((n) & 3) << 6) 179 #define FDTYPE(s) ((s) & 0x3f) 180 181 /* 182 * fdc maintains a set (1!) of ivars per child of each controller. 183 */ 184 enum fdc_device_ivars { 185 FDC_IVAR_FDUNIT, 186 }; 187 188 /* 189 * Simple access macros for the ivars. 190 */ 191 #define FDC_ACCESSOR(A, B, T) \ 192 static __inline T fdc_get_ ## A(device_t dev) \ 193 { \ 194 uintptr_t v; \ 195 BUS_READ_IVAR(device_get_parent(dev), dev, FDC_IVAR_ ## B, &v); \ 196 return (T) v; \ 197 } 198 FDC_ACCESSOR(fdunit, FDUNIT, int) 199 200 /* configuration flags for fdc */ 201 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ 202 203 /* error returns for fd_cmd() */ 204 #define FD_FAILED -1 205 #define FD_NOT_VALID -2 206 #define FDC_ERRMAX 100 /* do not log more */ 207 /* 208 * Stop retrying after this many DMA overruns. Since each retry takes 209 * one revolution, with 300 rpm., 25 retries take approximately 5 210 * seconds which the read attempt will block in case the DMA overrun 211 * is persistent. 212 */ 213 #define FDC_DMAOV_MAX 25 214 215 /* 216 * Timeout value for the PIO loops to wait until the FDC main status 217 * register matches our expectations (request for master, direction 218 * bit). This is supposed to be a number of microseconds, although 219 * timing might actually not be very accurate. 220 * 221 * Timeouts of 100 msec are believed to be required for some broken 222 * (old) hardware. 223 */ 224 #define FDSTS_TIMEOUT 100000 225 226 /* 227 * Number of subdevices that can be used for different density types. 228 * By now, the lower 6 bit of the minor number are reserved for this, 229 * allowing for up to 64 subdevices, but we only use 16 out of this. 230 * Density #0 is used for automatic format detection, the other 231 * densities are available as programmable densities (for assignment 232 * by fdcontrol(8)). 233 * The upper 2 bits of the minor number are reserved for the subunit 234 * (drive #) per controller. 235 */ 236 #define NUMDENS 16 237 238 #define FDBIO_RDSECTID BIO_CMD1 239 240 /* 241 * List of native drive densities. Order must match enum fd_drivetype 242 * in <sys/fdcio.h>. Upon attaching the drive, each of the 243 * programmable subdevices is initialized with the native density 244 * definition. 245 */ 246 static struct fd_type fd_native_types[] = 247 { 248 { 0 }, /* FDT_NONE */ 249 { 9,2,0xFF,0x2A,40, 720,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_360K */ 250 { 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* FDT_12M */ 251 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_720K */ 252 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */ 253 #if 0 /* we currently don't handle 2.88 MB */ 254 { 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /*FDT_288M*/ 255 #else 256 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */ 257 #endif 258 }; 259 260 /* 261 * 360 KB 5.25" and 720 KB 3.5" drives don't have automatic density 262 * selection, they just start out with their native density (or lose). 263 * So 1.2 MB 5.25", 1.44 MB 3.5", and 2.88 MB 3.5" drives have their 264 * respective lists of densities to search for. 265 */ 266 static struct fd_type fd_searchlist_12m[] = { 267 { 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* 1.2M */ 268 { 9,2,0xFF,0x23,40, 720,FDC_300KBPS,2,0x50,1,0,FL_MFM|FL_2STEP }, /* 360K */ 269 { 9,2,0xFF,0x20,80,1440,FDC_300KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 270 }; 271 272 static struct fd_type fd_searchlist_144m[] = { 273 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */ 274 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 275 }; 276 277 /* We search for 1.44M first since this is the most common case. */ 278 static struct fd_type fd_searchlist_288m[] = { 279 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */ 280 #if 0 281 { 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /* 2.88M */ 282 #endif 283 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 284 }; 285 286 #define MAX_SEC_SIZE (128 << 3) 287 #define MAX_CYLINDER 85 /* some people really stress their drives 288 * up to cyl 82 */ 289 #define MAX_HEAD 1 290 291 static devclass_t fdc_devclass; 292 293 /* 294 * Per drive structure (softc). 295 */ 296 struct fd_data { 297 struct fdc_data *fdc; /* pointer to controller structure */ 298 int fdsu; /* this units number on this controller */ 299 enum fd_drivetype type; /* drive type */ 300 struct fd_type *ft; /* pointer to current type descriptor */ 301 struct fd_type fts[NUMDENS]; /* type descriptors */ 302 int flags; 303 #define FD_OPEN 0x01 /* it's open */ 304 #define FD_NONBLOCK 0x02 /* O_NONBLOCK set */ 305 #define FD_ACTIVE 0x04 /* it's active */ 306 #define FD_MOTOR 0x08 /* motor should be on */ 307 #define FD_MOTOR_WAIT 0x10 /* motor coming up */ 308 #define FD_UA 0x20 /* force unit attention */ 309 int skip; 310 int hddrv; 311 #define FD_NO_TRACK -2 312 int track; /* where we think the head is */ 313 int options; /* user configurable options, see fdcio.h */ 314 struct callout_handle toffhandle; 315 struct callout_handle tohandle; 316 struct devstat device_stats; 317 eventhandler_tag clonetag; 318 dev_t masterdev; 319 dev_t clonedevs[NUMDENS - 1]; 320 device_t dev; 321 fdu_t fdu; 322 }; 323 324 struct fdc_ivars { 325 int fdunit; 326 }; 327 static devclass_t fd_devclass; 328 329 /* configuration flags for fd */ 330 #define FD_TYPEMASK 0x0f /* drive type, matches enum 331 * fd_drivetype; on i386 machines, if 332 * given as 0, use RTC type for fd0 333 * and fd1 */ 334 #define FD_DTYPE(flags) ((flags) & FD_TYPEMASK) 335 #define FD_NO_CHLINE 0x10 /* drive does not support changeline 336 * aka. unit attention */ 337 #define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just 338 * assume it is there */ 339 340 /* 341 * Throughout this file the following conventions will be used: 342 * 343 * fd is a pointer to the fd_data struct for the drive in question 344 * fdc is a pointer to the fdc_data struct for the controller 345 * fdu is the floppy drive unit number 346 * fdcu is the floppy controller unit number 347 * fdsu is the floppy drive unit number on that controller. (sub-unit) 348 */ 349 350 /* 351 * Function declarations, same (chaotic) order as they appear in the 352 * file. Re-ordering is too late now, it would only obfuscate the 353 * diffs against old and offspring versions (like the PC98 one). 354 * 355 * Anyone adding functions here, please keep this sequence the same 356 * as below -- makes locating a particular function in the body much 357 * easier. 358 */ 359 static void fdout_wr(fdc_p, u_int8_t); 360 static u_int8_t fdsts_rd(fdc_p); 361 static void fddata_wr(fdc_p, u_int8_t); 362 static u_int8_t fddata_rd(fdc_p); 363 static void fdctl_wr_isa(fdc_p, u_int8_t); 364 #if NCARD > 0 365 static void fdctl_wr_pcmcia(fdc_p, u_int8_t); 366 #endif 367 #if 0 368 static u_int8_t fdin_rd(fdc_p); 369 #endif 370 static int fdc_err(struct fdc_data *, const char *); 371 static int fd_cmd(struct fdc_data *, int, ...); 372 static int enable_fifo(fdc_p fdc); 373 static int fd_sense_drive_status(fdc_p, int *); 374 static int fd_sense_int(fdc_p, int *, int *); 375 static int fd_read_status(fdc_p); 376 static int fdc_alloc_resources(struct fdc_data *); 377 static void fdc_release_resources(struct fdc_data *); 378 static int fdc_read_ivar(device_t, device_t, int, uintptr_t *); 379 static int fdc_probe(device_t); 380 #if NCARD > 0 381 static int fdc_pccard_probe(device_t); 382 #endif 383 static int fdc_detach(device_t dev); 384 static void fdc_add_child(device_t, const char *, int); 385 static int fdc_attach(device_t); 386 static int fdc_print_child(device_t, device_t); 387 static void fd_clone (void *, char *, int, dev_t *); 388 static int fd_probe(device_t); 389 static int fd_attach(device_t); 390 static int fd_detach(device_t); 391 static void set_motor(struct fdc_data *, int, int); 392 # define TURNON 1 393 # define TURNOFF 0 394 static timeout_t fd_turnoff; 395 static timeout_t fd_motor_on; 396 static void fd_turnon(struct fd_data *); 397 static void fdc_reset(fdc_p); 398 static int fd_in(struct fdc_data *, int *); 399 static int out_fdc(struct fdc_data *, int); 400 /* 401 * The open function is named Fdopen() to avoid confusion with fdopen() 402 * in fd(4). The difference is now only meaningful for debuggers. 403 */ 404 static d_open_t Fdopen; 405 static d_close_t fdclose; 406 static d_strategy_t fdstrategy; 407 static void fdstart(struct fdc_data *); 408 static timeout_t fd_iotimeout; 409 static timeout_t fd_pseudointr; 410 static driver_intr_t fdc_intr; 411 static int fdcpio(fdc_p, long, caddr_t, u_int); 412 static int fdautoselect(dev_t); 413 static int fdstate(struct fdc_data *); 414 static int retrier(struct fdc_data *); 415 static void fdbiodone(struct bio *); 416 static int fdmisccmd(dev_t, u_int, void *); 417 static d_ioctl_t fdioctl; 418 419 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 420 421 #ifdef FDC_DEBUG 422 /* CAUTION: fd_debug causes huge amounts of logging output */ 423 static int volatile fd_debug = 0; 424 #define TRACE0(arg) do { if (fd_debug) printf(arg); } while (0) 425 #define TRACE1(arg1, arg2) do { if (fd_debug) printf(arg1, arg2); } while (0) 426 #else /* FDC_DEBUG */ 427 #define TRACE0(arg) do { } while (0) 428 #define TRACE1(arg1, arg2) do { } while (0) 429 #endif /* FDC_DEBUG */ 430 431 /* 432 * Bus space handling (access to low-level IO). 433 */ 434 static void 435 fdout_wr(fdc_p fdc, u_int8_t v) 436 { 437 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 438 } 439 440 static u_int8_t 441 fdsts_rd(fdc_p fdc) 442 { 443 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 444 } 445 446 static void 447 fddata_wr(fdc_p fdc, u_int8_t v) 448 { 449 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 450 } 451 452 static u_int8_t 453 fddata_rd(fdc_p fdc) 454 { 455 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 456 } 457 458 static void 459 fdctl_wr_isa(fdc_p fdc, u_int8_t v) 460 { 461 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 462 } 463 464 #if NCARD > 0 465 static void 466 fdctl_wr_pcmcia(fdc_p fdc, u_int8_t v) 467 { 468 bus_space_write_1(fdc->portt, fdc->porth, FDCTL+fdc->port_off, v); 469 } 470 #endif 471 472 static u_int8_t 473 fdin_rd(fdc_p fdc) 474 { 475 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 476 } 477 478 #define CDEV_MAJOR 9 479 static struct cdevsw fd_cdevsw = { 480 /* open */ Fdopen, 481 /* close */ fdclose, 482 /* read */ physread, 483 /* write */ physwrite, 484 /* ioctl */ fdioctl, 485 /* poll */ nopoll, 486 /* mmap */ nommap, 487 /* strategy */ fdstrategy, 488 /* name */ "fd", 489 /* maj */ CDEV_MAJOR, 490 /* dump */ nodump, 491 /* psize */ nopsize, 492 /* flags */ D_DISK, 493 }; 494 495 /* 496 * Auxiliary functions. Well, some only. Others are scattered 497 * throughout the entire file. 498 */ 499 static int 500 fdc_err(struct fdc_data *fdc, const char *s) 501 { 502 fdc->fdc_errs++; 503 if (s) { 504 if (fdc->fdc_errs < FDC_ERRMAX) 505 device_printf(fdc->fdc_dev, "%s", s); 506 else if (fdc->fdc_errs == FDC_ERRMAX) 507 device_printf(fdc->fdc_dev, "too many errors, not " 508 "logging any more\n"); 509 } 510 511 return FD_FAILED; 512 } 513 514 /* 515 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 516 * Unit number, 517 * # of output bytes, output bytes as ints ..., 518 * # of input bytes, input bytes as ints ... 519 */ 520 static int 521 fd_cmd(struct fdc_data *fdc, int n_out, ...) 522 { 523 u_char cmd; 524 int n_in; 525 int n; 526 va_list ap; 527 528 va_start(ap, n_out); 529 cmd = (u_char)(va_arg(ap, int)); 530 va_end(ap); 531 va_start(ap, n_out); 532 for (n = 0; n < n_out; n++) 533 { 534 if (out_fdc(fdc, va_arg(ap, int)) < 0) 535 { 536 char msg[50]; 537 snprintf(msg, sizeof(msg), 538 "cmd %x failed at out byte %d of %d\n", 539 cmd, n + 1, n_out); 540 return fdc_err(fdc, msg); 541 } 542 } 543 n_in = va_arg(ap, int); 544 for (n = 0; n < n_in; n++) 545 { 546 int *ptr = va_arg(ap, int *); 547 if (fd_in(fdc, ptr) < 0) 548 { 549 char msg[50]; 550 snprintf(msg, sizeof(msg), 551 "cmd %02x failed at in byte %d of %d\n", 552 cmd, n + 1, n_in); 553 return fdc_err(fdc, msg); 554 } 555 } 556 557 return 0; 558 } 559 560 static int 561 enable_fifo(fdc_p fdc) 562 { 563 int i, j; 564 565 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 566 567 /* 568 * Cannot use fd_cmd the normal way here, since 569 * this might be an invalid command. Thus we send the 570 * first byte, and check for an early turn of data directon. 571 */ 572 573 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 574 return fdc_err(fdc, "Enable FIFO failed\n"); 575 576 /* If command is invalid, return */ 577 j = FDSTS_TIMEOUT; 578 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 579 != NE7_RQM && j-- > 0) { 580 if (i == (NE7_DIO | NE7_RQM)) { 581 fdc_reset(fdc); 582 return FD_FAILED; 583 } 584 DELAY(1); 585 } 586 if (j<0 || 587 fd_cmd(fdc, 3, 588 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 589 fdc_reset(fdc); 590 return fdc_err(fdc, "Enable FIFO failed\n"); 591 } 592 fdc->flags |= FDC_HAS_FIFO; 593 return 0; 594 } 595 if (fd_cmd(fdc, 4, 596 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 597 return fdc_err(fdc, "Re-enable FIFO failed\n"); 598 return 0; 599 } 600 601 static int 602 fd_sense_drive_status(fdc_p fdc, int *st3p) 603 { 604 int st3; 605 606 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 607 { 608 return fdc_err(fdc, "Sense Drive Status failed\n"); 609 } 610 if (st3p) 611 *st3p = st3; 612 613 return 0; 614 } 615 616 static int 617 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 618 { 619 int cyl, st0, ret; 620 621 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 622 if (ret) { 623 (void)fdc_err(fdc, 624 "sense intr err reading stat reg 0\n"); 625 return ret; 626 } 627 628 if (st0p) 629 *st0p = st0; 630 631 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 632 /* 633 * There doesn't seem to have been an interrupt. 634 */ 635 return FD_NOT_VALID; 636 } 637 638 if (fd_in(fdc, &cyl) < 0) { 639 return fdc_err(fdc, "can't get cyl num\n"); 640 } 641 642 if (cylp) 643 *cylp = cyl; 644 645 return 0; 646 } 647 648 649 static int 650 fd_read_status(fdc_p fdc) 651 { 652 int i, ret; 653 654 for (i = ret = 0; i < 7; i++) { 655 /* 656 * XXX types are poorly chosen. Only bytes can be read 657 * from the hardware, but fdc->status[] wants u_ints and 658 * fd_in() gives ints. 659 */ 660 int status; 661 662 ret = fd_in(fdc, &status); 663 fdc->status[i] = status; 664 if (ret != 0) 665 break; 666 } 667 668 if (ret == 0) 669 fdc->flags |= FDC_STAT_VALID; 670 else 671 fdc->flags &= ~FDC_STAT_VALID; 672 673 return ret; 674 } 675 676 static int 677 fdc_alloc_resources(struct fdc_data *fdc) 678 { 679 device_t dev; 680 int ispnp, ispcmcia, nports; 681 682 dev = fdc->fdc_dev; 683 ispnp = (fdc->flags & FDC_ISPNP) != 0; 684 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 685 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 686 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 687 688 /* 689 * On standard ISA, we don't just use an 8 port range 690 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 691 * register at 0x3f6. 692 * 693 * Isn't PC hardware wonderful. 694 * 695 * The Y-E Data PCMCIA FDC doesn't have this problem, it 696 * uses the register with offset 6 for pseudo-DMA, and the 697 * one with offset 7 as control register. 698 */ 699 nports = ispcmcia ? 8 : (ispnp ? 1 : 6); 700 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 701 &fdc->rid_ioport, 0ul, ~0ul, 702 nports, RF_ACTIVE); 703 if (fdc->res_ioport == 0) { 704 device_printf(dev, "cannot reserve I/O port range (%d ports)\n", 705 nports); 706 return ENXIO; 707 } 708 fdc->portt = rman_get_bustag(fdc->res_ioport); 709 fdc->porth = rman_get_bushandle(fdc->res_ioport); 710 711 if (!ispcmcia) { 712 /* 713 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 714 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 715 * by checking the size and adjust the port address 716 * accordingly. 717 */ 718 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 719 fdc->port_off = -2; 720 721 /* 722 * Register the control port range as rid 1 if it 723 * isn't there already. Most PnP BIOSen will have 724 * already done this but non-PnP configurations don't. 725 * 726 * And some (!!) report 0x3f2-0x3f5 and completely 727 * leave out the control register! It seems that some 728 * non-antique controller chips have a different 729 * method of programming the transfer speed which 730 * doesn't require the control register, but it's 731 * mighty bogus as the chip still responds to the 732 * address for the control register. 733 */ 734 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 735 u_long ctlstart; 736 737 /* Find the control port, usually 0x3f7 */ 738 ctlstart = rman_get_start(fdc->res_ioport) + 739 fdc->port_off + 7; 740 741 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); 742 } 743 744 /* 745 * Now (finally!) allocate the control port. 746 */ 747 fdc->rid_ctl = 1; 748 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 749 &fdc->rid_ctl, 750 0ul, ~0ul, 1, RF_ACTIVE); 751 if (fdc->res_ctl == 0) { 752 device_printf(dev, 753 "cannot reserve control I/O port range (control port)\n"); 754 return ENXIO; 755 } 756 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 757 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 758 } 759 760 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 761 &fdc->rid_irq, 0ul, ~0ul, 1, 762 RF_ACTIVE); 763 if (fdc->res_irq == 0) { 764 device_printf(dev, "cannot reserve interrupt line\n"); 765 return ENXIO; 766 } 767 768 if ((fdc->flags & FDC_NODMA) == 0) { 769 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 770 &fdc->rid_drq, 0ul, ~0ul, 1, 771 RF_ACTIVE); 772 if (fdc->res_drq == 0) { 773 device_printf(dev, "cannot reserve DMA request line\n"); 774 return ENXIO; 775 } 776 fdc->dmachan = fdc->res_drq->r_start; 777 } 778 779 return 0; 780 } 781 782 static void 783 fdc_release_resources(struct fdc_data *fdc) 784 { 785 device_t dev; 786 787 dev = fdc->fdc_dev; 788 if (fdc->res_irq != 0) { 789 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 790 fdc->res_irq); 791 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 792 fdc->res_irq); 793 } 794 if (fdc->res_ctl != 0) { 795 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 796 fdc->res_ctl); 797 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 798 fdc->res_ctl); 799 } 800 if (fdc->res_ioport != 0) { 801 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 802 fdc->res_ioport); 803 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 804 fdc->res_ioport); 805 } 806 if (fdc->res_drq != 0) { 807 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 808 fdc->res_drq); 809 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 810 fdc->res_drq); 811 } 812 } 813 814 /* 815 * Configuration/initialization stuff, per controller. 816 */ 817 818 static struct isa_pnp_id fdc_ids[] = { 819 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 820 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 821 {0} 822 }; 823 824 static int 825 fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 826 { 827 struct fdc_ivars *ivars = device_get_ivars(child); 828 829 switch (which) { 830 case FDC_IVAR_FDUNIT: 831 *result = ivars->fdunit; 832 break; 833 default: 834 return ENOENT; 835 } 836 return 0; 837 } 838 839 static int 840 fdc_probe(device_t dev) 841 { 842 int error, ic_type; 843 struct fdc_data *fdc; 844 845 fdc = device_get_softc(dev); 846 bzero(fdc, sizeof *fdc); 847 fdc->fdc_dev = dev; 848 fdc->fdctl_wr = fdctl_wr_isa; 849 850 /* Check pnp ids */ 851 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 852 if (error == ENXIO) 853 return ENXIO; 854 if (error == 0) 855 fdc->flags |= FDC_ISPNP; 856 857 /* Attempt to allocate our resources for the duration of the probe */ 858 error = fdc_alloc_resources(fdc); 859 if (error) 860 goto out; 861 862 /* First - lets reset the floppy controller */ 863 fdout_wr(fdc, 0); 864 DELAY(100); 865 fdout_wr(fdc, FDO_FRST); 866 867 /* see if it can handle a command */ 868 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 869 NE7_SPEC_2(2, 0), 0)) { 870 error = ENXIO; 871 goto out; 872 } 873 874 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 875 ic_type = (u_char)ic_type; 876 switch (ic_type) { 877 case 0x80: 878 device_set_desc(dev, "NEC 765 or clone"); 879 fdc->fdct = FDC_NE765; 880 break; 881 case 0x81: /* not mentioned in any hardware doc */ 882 case 0x90: 883 device_set_desc(dev, 884 "enhanced floppy controller (i82077, NE72065 or clone)"); 885 fdc->fdct = FDC_ENHANCED; 886 break; 887 default: 888 device_set_desc(dev, "generic floppy controller"); 889 fdc->fdct = FDC_UNKNOWN; 890 break; 891 } 892 } 893 894 out: 895 fdc_release_resources(fdc); 896 return (error); 897 } 898 899 #if NCARD > 0 900 901 static int 902 fdc_pccard_probe(device_t dev) 903 { 904 int error; 905 struct fdc_data *fdc; 906 907 fdc = device_get_softc(dev); 908 bzero(fdc, sizeof *fdc); 909 fdc->fdc_dev = dev; 910 fdc->fdctl_wr = fdctl_wr_pcmcia; 911 912 fdc->flags |= FDC_ISPCMCIA | FDC_NODMA; 913 914 /* Attempt to allocate our resources for the duration of the probe */ 915 error = fdc_alloc_resources(fdc); 916 if (error) 917 goto out; 918 919 /* First - lets reset the floppy controller */ 920 fdout_wr(fdc, 0); 921 DELAY(100); 922 fdout_wr(fdc, FDO_FRST); 923 924 /* see if it can handle a command */ 925 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 926 NE7_SPEC_2(2, 0), 0)) { 927 error = ENXIO; 928 goto out; 929 } 930 931 device_set_desc(dev, "Y-E Data PCMCIA floppy"); 932 fdc->fdct = FDC_NE765; 933 934 out: 935 fdc_release_resources(fdc); 936 return (error); 937 } 938 939 #endif /* NCARD > 0 */ 940 941 static int 942 fdc_detach(device_t dev) 943 { 944 struct fdc_data *fdc; 945 int error; 946 947 fdc = device_get_softc(dev); 948 949 /* have our children detached first */ 950 if ((error = bus_generic_detach(dev))) 951 return (error); 952 953 /* reset controller, turn motor off */ 954 fdout_wr(fdc, 0); 955 956 if ((fdc->flags & FDC_NODMA) == 0) 957 isa_dma_release(fdc->dmachan); 958 959 if ((fdc->flags & FDC_ATTACHED) == 0) { 960 device_printf(dev, "already unloaded\n"); 961 return (0); 962 } 963 fdc->flags &= ~FDC_ATTACHED; 964 965 BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq, 966 fdc->fdc_intr); 967 fdc_release_resources(fdc); 968 device_printf(dev, "unload\n"); 969 return (0); 970 } 971 972 /* 973 * Add a child device to the fdc controller. It will then be probed etc. 974 */ 975 static void 976 fdc_add_child(device_t dev, const char *name, int unit) 977 { 978 int disabled, flags; 979 struct fdc_ivars *ivar; 980 device_t child; 981 982 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO); 983 if (ivar == NULL) 984 return; 985 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 986 ivar->fdunit = 0; 987 child = device_add_child(dev, name, unit); 988 if (child == NULL) { 989 free(ivar, M_DEVBUF); 990 return; 991 } 992 device_set_ivars(child, ivar); 993 if (resource_int_value(name, unit, "flags", &flags) == 0) 994 device_set_flags(child, flags); 995 if (resource_int_value(name, unit, "disabled", &disabled) == 0 996 && disabled != 0) 997 device_disable(child); 998 } 999 1000 static int 1001 fdc_attach(device_t dev) 1002 { 1003 struct fdc_data *fdc; 1004 const char *name, *dname; 1005 int i, error, dunit; 1006 1007 fdc = device_get_softc(dev); 1008 error = fdc_alloc_resources(fdc); 1009 if (error) { 1010 device_printf(dev, "cannot re-acquire resources\n"); 1011 return error; 1012 } 1013 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 1014 INTR_TYPE_BIO | INTR_ENTROPY, fdc_intr, fdc, 1015 &fdc->fdc_intr); 1016 if (error) { 1017 device_printf(dev, "cannot setup interrupt\n"); 1018 return error; 1019 } 1020 fdc->fdcu = device_get_unit(dev); 1021 fdc->flags |= FDC_ATTACHED | FDC_NEEDS_RESET; 1022 1023 if ((fdc->flags & FDC_NODMA) == 0) { 1024 /* 1025 * Acquire the DMA channel forever, the driver will do 1026 * the rest 1027 * XXX should integrate with rman 1028 */ 1029 isa_dma_acquire(fdc->dmachan); 1030 isa_dmainit(fdc->dmachan, MAX_SEC_SIZE); 1031 } 1032 fdc->state = DEVIDLE; 1033 1034 /* reset controller, turn motor off, clear fdout mirror reg */ 1035 fdout_wr(fdc, fdc->fdout = 0); 1036 bioq_init(&fdc->head); 1037 1038 /* 1039 * Probe and attach any children. We should probably detect 1040 * devices from the BIOS unless overridden. 1041 */ 1042 name = device_get_nameunit(dev); 1043 i = 0; 1044 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) 1045 fdc_add_child(dev, dname, dunit); 1046 1047 if ((error = bus_generic_attach(dev)) != 0) 1048 return (error); 1049 1050 return (0); 1051 } 1052 1053 static int 1054 fdc_print_child(device_t me, device_t child) 1055 { 1056 int retval = 0, flags; 1057 1058 retval += bus_print_child_header(me, child); 1059 retval += printf(" on %s drive %d", device_get_nameunit(me), 1060 fdc_get_fdunit(child)); 1061 if ((flags = device_get_flags(me)) != 0) 1062 retval += printf(" flags %#x", flags); 1063 retval += printf("\n"); 1064 1065 return (retval); 1066 } 1067 1068 static device_method_t fdc_methods[] = { 1069 /* Device interface */ 1070 DEVMETHOD(device_probe, fdc_probe), 1071 DEVMETHOD(device_attach, fdc_attach), 1072 DEVMETHOD(device_detach, fdc_detach), 1073 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1074 DEVMETHOD(device_suspend, bus_generic_suspend), 1075 DEVMETHOD(device_resume, bus_generic_resume), 1076 1077 /* Bus interface */ 1078 DEVMETHOD(bus_print_child, fdc_print_child), 1079 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 1080 /* Our children never use any other bus interface methods. */ 1081 1082 { 0, 0 } 1083 }; 1084 1085 static driver_t fdc_driver = { 1086 "fdc", 1087 fdc_methods, 1088 sizeof(struct fdc_data) 1089 }; 1090 1091 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 1092 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, 0, 0); 1093 1094 #if NCARD > 0 1095 1096 static device_method_t fdc_pccard_methods[] = { 1097 /* Device interface */ 1098 DEVMETHOD(device_probe, fdc_pccard_probe), 1099 DEVMETHOD(device_attach, fdc_attach), 1100 DEVMETHOD(device_detach, fdc_detach), 1101 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1102 DEVMETHOD(device_suspend, bus_generic_suspend), 1103 DEVMETHOD(device_resume, bus_generic_resume), 1104 1105 /* Bus interface */ 1106 DEVMETHOD(bus_print_child, fdc_print_child), 1107 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 1108 /* Our children never use any other bus interface methods. */ 1109 1110 { 0, 0 } 1111 }; 1112 1113 static driver_t fdc_pccard_driver = { 1114 "fdc", 1115 fdc_pccard_methods, 1116 sizeof(struct fdc_data) 1117 }; 1118 1119 DRIVER_MODULE(fdc, pccard, fdc_pccard_driver, fdc_devclass, 0, 0); 1120 1121 #endif /* NCARD > 0 */ 1122 1123 /* 1124 * Create a clone device upon request by devfs. 1125 */ 1126 static void 1127 fd_clone(void *arg, char *name, int namelen, dev_t *dev) 1128 { 1129 struct fd_data *fd; 1130 int i, u; 1131 char *n; 1132 size_t l; 1133 1134 fd = (struct fd_data *)arg; 1135 if (*dev != NODEV) 1136 return; 1137 if (dev_stdclone(name, &n, "fd", &u) != 2) 1138 return; 1139 l = strlen(n); 1140 if (l == 1 && *n >= 'a' && *n <= 'h') { 1141 /* 1142 * Trailing letters a through h denote 1143 * pseudo-partitions. We don't support true 1144 * (UFS-style) partitions, so we just implement them 1145 * as symlinks if someone asks us nicely. 1146 */ 1147 *dev = make_dev_alias(fd->masterdev, name); 1148 return; 1149 } 1150 if (l >= 2 && l <= 5 && *n == '.') { 1151 /* 1152 * Trailing numbers, preceded by a dot, denote 1153 * subdevices for different densities. Historically, 1154 * they have been named by density (like fd0.1440), 1155 * but we allow arbitrary numbers between 1 and 4 1156 * digits, so fd0.1 through fd0.15 are possible as 1157 * well. 1158 */ 1159 for (i = 1; i < l; i++) 1160 if (n[i] < '0' || n[i] > '9') 1161 return; 1162 for (i = 0; i < NUMDENS - 1; i++) 1163 if (fd->clonedevs[i] == NODEV) { 1164 *dev = make_dev(&fd_cdevsw, 1165 FDNUMTOUNIT(u) + i + 1, 1166 UID_ROOT, GID_OPERATOR, 0640, 1167 name); 1168 fd->clonedevs[i] = *dev; 1169 return; 1170 } 1171 } 1172 } 1173 1174 /* 1175 * Configuration/initialization, per drive. 1176 */ 1177 static int 1178 fd_probe(device_t dev) 1179 { 1180 int i; 1181 u_int st0, st3; 1182 struct fd_data *fd; 1183 struct fdc_data *fdc; 1184 fdsu_t fdsu; 1185 int flags; 1186 1187 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 1188 fd = device_get_softc(dev); 1189 fdc = device_get_softc(device_get_parent(dev)); 1190 flags = device_get_flags(dev); 1191 1192 bzero(fd, sizeof *fd); 1193 fd->dev = dev; 1194 fd->fdc = fdc; 1195 fd->fdsu = fdsu; 1196 fd->fdu = device_get_unit(dev); 1197 fd->flags = FD_UA; /* make sure fdautoselect() will be called */ 1198 1199 fd->type = FD_DTYPE(flags); 1200 /* 1201 * XXX I think using __i386__ is wrong here since we actually want to probe 1202 * for the machine type, not the CPU type (so non-PC arch's like the PC98 will 1203 * fail the probe). However, for whatever reason, testing for _MACHINE_ARCH 1204 * == i386 breaks the test on FreeBSD/Alpha. 1205 */ 1206 #ifdef __i386__ 1207 if (fd->type == FDT_NONE && (fd->fdu == 0 || fd->fdu == 1)) { 1208 /* Look up what the BIOS thinks we have. */ 1209 if (fd->fdu == 0) { 1210 if ((fdc->flags & FDC_ISPCMCIA)) 1211 /* 1212 * Somewhat special. No need to force the 1213 * user to set device flags, since the Y-E 1214 * Data PCMCIA floppy is always a 1.44 MB 1215 * device. 1216 */ 1217 fd->type = FDT_144M; 1218 else 1219 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4; 1220 } else { 1221 fd->type = rtcin(RTC_FDISKETTE) & 0x0f; 1222 } 1223 if (fd->type == FDT_288M_1) 1224 fd->type = FDT_288M; 1225 } 1226 #endif /* __i386__ */ 1227 /* is there a unit? */ 1228 if (fd->type == FDT_NONE) 1229 return (ENXIO); 1230 1231 /* select it */ 1232 set_motor(fdc, fdsu, TURNON); 1233 fdc_reset(fdc); /* XXX reset, then unreset, etc. */ 1234 DELAY(1000000); /* 1 sec */ 1235 1236 /* XXX This doesn't work before the first set_motor() */ 1237 if ((fdc->flags & FDC_HAS_FIFO) == 0 && 1238 fdc->fdct == FDC_ENHANCED && 1239 (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 && 1240 enable_fifo(fdc) == 0) { 1241 device_printf(device_get_parent(dev), 1242 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 1243 } 1244 1245 if ((flags & FD_NO_PROBE) == 0) { 1246 /* If we're at track 0 first seek inwards. */ 1247 if ((fd_sense_drive_status(fdc, &st3) == 0) && 1248 (st3 & NE7_ST3_T0)) { 1249 /* Seek some steps... */ 1250 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 1251 /* ...wait a moment... */ 1252 DELAY(300000); 1253 /* make ctrlr happy: */ 1254 fd_sense_int(fdc, 0, 0); 1255 } 1256 } 1257 1258 for (i = 0; i < 2; i++) { 1259 /* 1260 * we must recalibrate twice, just in case the 1261 * heads have been beyond cylinder 76, since 1262 * most FDCs still barf when attempting to 1263 * recalibrate more than 77 steps 1264 */ 1265 /* go back to 0: */ 1266 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 1267 /* a second being enough for full stroke seek*/ 1268 DELAY(i == 0 ? 1000000 : 300000); 1269 1270 /* anything responding? */ 1271 if (fd_sense_int(fdc, &st0, 0) == 0 && 1272 (st0 & NE7_ST0_EC) == 0) 1273 break; /* already probed succesfully */ 1274 } 1275 } 1276 } 1277 1278 set_motor(fdc, fdsu, TURNOFF); 1279 1280 if ((flags & FD_NO_PROBE) == 0 && 1281 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */ 1282 return (ENXIO); 1283 1284 switch (fd->type) { 1285 case FDT_12M: 1286 device_set_desc(dev, "1200-KB 5.25\" drive"); 1287 fd->type = FDT_12M; 1288 break; 1289 case FDT_144M: 1290 device_set_desc(dev, "1440-KB 3.5\" drive"); 1291 fd->type = FDT_144M; 1292 break; 1293 case FDT_288M: 1294 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 1295 fd->type = FDT_288M; 1296 break; 1297 case FDT_360K: 1298 device_set_desc(dev, "360-KB 5.25\" drive"); 1299 fd->type = FDT_360K; 1300 break; 1301 case FDT_720K: 1302 device_set_desc(dev, "720-KB 3.5\" drive"); 1303 fd->type = FDT_720K; 1304 break; 1305 default: 1306 return (ENXIO); 1307 } 1308 fd->track = FD_NO_TRACK; 1309 fd->fdc = fdc; 1310 fd->fdsu = fdsu; 1311 fd->options = 0; 1312 callout_handle_init(&fd->toffhandle); 1313 callout_handle_init(&fd->tohandle); 1314 1315 /* initialize densities for subdevices */ 1316 for (i = 0; i < NUMDENS; i++) 1317 memcpy(fd->fts + i, fd_native_types + fd->type, 1318 sizeof(struct fd_type)); 1319 return (0); 1320 } 1321 1322 static int 1323 fd_attach(device_t dev) 1324 { 1325 struct fd_data *fd; 1326 static int cdevsw_add_done; 1327 int i; 1328 1329 if (!cdevsw_add_done) { 1330 cdevsw_add(&fd_cdevsw); /* XXX */ 1331 cdevsw_add_done = 1; 1332 } 1333 fd = device_get_softc(dev); 1334 fd->clonetag = EVENTHANDLER_REGISTER(dev_clone, fd_clone, fd, 1000); 1335 fd->masterdev = make_dev(&fd_cdevsw, fd->fdu << 6, 1336 UID_ROOT, GID_OPERATOR, 0640, "fd%d", fd->fdu); 1337 for (i = 0; i < NUMDENS - 1; i++) 1338 fd->clonedevs[i] = NODEV; 1339 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1340 device_get_unit(dev), 0, DEVSTAT_NO_ORDERED_TAGS, 1341 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1342 DEVSTAT_PRIORITY_FD); 1343 return (0); 1344 } 1345 1346 static int 1347 fd_detach(device_t dev) 1348 { 1349 struct fd_data *fd; 1350 int i; 1351 1352 fd = device_get_softc(dev); 1353 untimeout(fd_turnoff, fd, fd->toffhandle); 1354 devstat_remove_entry(&fd->device_stats); 1355 destroy_dev(fd->masterdev); 1356 for (i = 0; i < NUMDENS - 1; i++) 1357 if (fd->clonedevs[i] != NODEV) 1358 destroy_dev(fd->clonedevs[i]); 1359 cdevsw_remove(&fd_cdevsw); 1360 EVENTHANDLER_DEREGISTER(dev_clone, fd->clonetag); 1361 1362 return (0); 1363 } 1364 1365 static device_method_t fd_methods[] = { 1366 /* Device interface */ 1367 DEVMETHOD(device_probe, fd_probe), 1368 DEVMETHOD(device_attach, fd_attach), 1369 DEVMETHOD(device_detach, fd_detach), 1370 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1371 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1372 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1373 1374 { 0, 0 } 1375 }; 1376 1377 static driver_t fd_driver = { 1378 "fd", 1379 fd_methods, 1380 sizeof(struct fd_data) 1381 }; 1382 1383 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1384 1385 /* 1386 * More auxiliary functions. 1387 */ 1388 /* 1389 * Motor control stuff. 1390 * Remember to not deselect the drive we're working on. 1391 */ 1392 static void 1393 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1394 { 1395 int fdout; 1396 1397 fdout = fdc->fdout; 1398 if (turnon) { 1399 fdout &= ~FDO_FDSEL; 1400 fdout |= (FDO_MOEN0 << fdsu) | FDO_FDMAEN | FDO_FRST | fdsu; 1401 } else 1402 fdout &= ~(FDO_MOEN0 << fdsu); 1403 fdc->fdout = fdout; 1404 fdout_wr(fdc, fdout); 1405 TRACE1("[0x%x->FDOUT]", fdout); 1406 } 1407 1408 static void 1409 fd_turnoff(void *xfd) 1410 { 1411 int s; 1412 fd_p fd = xfd; 1413 1414 TRACE1("[fd%d: turnoff]", fd->fdu); 1415 1416 s = splbio(); 1417 /* 1418 * Don't turn off the motor yet if the drive is active. 1419 * 1420 * If we got here, this could only mean we missed an interrupt. 1421 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1422 * after a controller reset. Just schedule a pseudo-interrupt 1423 * so the state machine gets re-entered. 1424 */ 1425 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1426 fdc_intr(fd->fdc); 1427 splx(s); 1428 return; 1429 } 1430 1431 fd->flags &= ~FD_MOTOR; 1432 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1433 splx(s); 1434 } 1435 1436 static void 1437 fd_motor_on(void *xfd) 1438 { 1439 int s; 1440 fd_p fd = xfd; 1441 1442 s = splbio(); 1443 fd->flags &= ~FD_MOTOR_WAIT; 1444 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1445 { 1446 fdc_intr(fd->fdc); 1447 } 1448 splx(s); 1449 } 1450 1451 static void 1452 fd_turnon(fd_p fd) 1453 { 1454 if(!(fd->flags & FD_MOTOR)) 1455 { 1456 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1457 set_motor(fd->fdc, fd->fdsu, TURNON); 1458 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */ 1459 } 1460 } 1461 1462 static void 1463 fdc_reset(fdc_p fdc) 1464 { 1465 /* Try a reset, keep motor on */ 1466 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1467 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1468 DELAY(100); 1469 /* enable FDC, but defer interrupts a moment */ 1470 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1471 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1472 DELAY(100); 1473 fdout_wr(fdc, fdc->fdout); 1474 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1475 1476 /* XXX after a reset, silently believe the FDC will accept commands */ 1477 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1478 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1479 0); 1480 if (fdc->flags & FDC_HAS_FIFO) 1481 (void) enable_fifo(fdc); 1482 } 1483 1484 /* 1485 * FDC IO functions, take care of the main status register, timeout 1486 * in case the desired status bits are never set. 1487 * 1488 * These PIO loops initially start out with short delays between 1489 * each iteration in the expectation that the required condition 1490 * is usually met quickly, so it can be handled immediately. After 1491 * about 1 ms, stepping is increased to achieve a better timing 1492 * accuracy in the calls to DELAY(). 1493 */ 1494 static int 1495 fd_in(struct fdc_data *fdc, int *ptr) 1496 { 1497 int i, j, step; 1498 1499 for (j = 0, step = 1; 1500 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) && 1501 j < FDSTS_TIMEOUT; 1502 j += step) { 1503 if (i == NE7_RQM) 1504 return (fdc_err(fdc, "ready for output in input\n")); 1505 if (j == 1000) 1506 step = 1000; 1507 DELAY(step); 1508 } 1509 if (j >= FDSTS_TIMEOUT) 1510 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); 1511 #ifdef FDC_DEBUG 1512 i = fddata_rd(fdc); 1513 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1514 *ptr = i; 1515 return (0); 1516 #else /* !FDC_DEBUG */ 1517 i = fddata_rd(fdc); 1518 if (ptr) 1519 *ptr = i; 1520 return (0); 1521 #endif /* FDC_DEBUG */ 1522 } 1523 1524 static int 1525 out_fdc(struct fdc_data *fdc, int x) 1526 { 1527 int i, j, step; 1528 1529 for (j = 0, step = 1; 1530 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM && 1531 j < FDSTS_TIMEOUT; 1532 j += step) { 1533 if (i == (NE7_DIO|NE7_RQM)) 1534 return (fdc_err(fdc, "ready for input in output\n")); 1535 if (j == 1000) 1536 step = 1000; 1537 DELAY(step); 1538 } 1539 if (j >= FDSTS_TIMEOUT) 1540 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); 1541 1542 /* Send the command and return */ 1543 fddata_wr(fdc, x); 1544 TRACE1("[0x%x->FDDATA]", x); 1545 return (0); 1546 } 1547 1548 /* 1549 * Block device driver interface functions (interspersed with even more 1550 * auxiliary functions). 1551 */ 1552 static int 1553 Fdopen(dev_t dev, int flags, int mode, struct thread *td) 1554 { 1555 fdu_t fdu = FDUNIT(minor(dev)); 1556 int type = FDTYPE(minor(dev)); 1557 fd_p fd; 1558 fdc_p fdc; 1559 int rv, unitattn, dflags; 1560 1561 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1562 return (ENXIO); 1563 fdc = fd->fdc; 1564 if ((fdc == NULL) || (fd->type == FDT_NONE)) 1565 return (ENXIO); 1566 if (type > NUMDENS) 1567 return (ENXIO); 1568 dflags = device_get_flags(fd->dev); 1569 /* 1570 * This is a bit bogus. It's still possible that e. g. a 1571 * descriptor gets inherited to a child, but then it's at 1572 * least for the same subdevice. By checking FD_OPEN here, we 1573 * can ensure that a device isn't attempted to be opened with 1574 * different densities at the same time where the second open 1575 * could clobber the settings from the first one. 1576 */ 1577 if (fd->flags & FD_OPEN) 1578 return (EBUSY); 1579 1580 if (type == 0) { 1581 if (flags & FNONBLOCK) { 1582 /* 1583 * Unfortunately, physio(9) discards its ioflag 1584 * argument, thus preventing us from seeing the 1585 * IO_NDELAY bit. So we need to keep track 1586 * ourselves. 1587 */ 1588 fd->flags |= FD_NONBLOCK; 1589 fd->ft = 0; 1590 } else { 1591 /* 1592 * Figure out a unit attention condition. 1593 * 1594 * If UA has been forced, proceed. 1595 * 1596 * If motor is off, turn it on for a moment 1597 * and select our drive, in order to read the 1598 * UA hardware signal. 1599 * 1600 * If motor is on, and our drive is currently 1601 * selected, just read the hardware bit. 1602 * 1603 * If motor is on, but active for another 1604 * drive on that controller, we are lost. We 1605 * cannot risk to deselect the other drive, so 1606 * we just assume a forced UA condition to be 1607 * on the safe side. 1608 */ 1609 unitattn = 0; 1610 if ((dflags & FD_NO_CHLINE) != 0 || 1611 (fd->flags & FD_UA) != 0) { 1612 unitattn = 1; 1613 fd->flags &= ~FD_UA; 1614 } else if (fdc->fdout & (FDO_MOEN0 | FDO_MOEN1 | 1615 FDO_MOEN2 | FDO_MOEN3)) { 1616 if ((fdc->fdout & FDO_FDSEL) == fd->fdsu) 1617 unitattn = fdin_rd(fdc) & FDI_DCHG; 1618 else 1619 unitattn = 1; 1620 } else { 1621 set_motor(fdc, fd->fdsu, TURNON); 1622 unitattn = fdin_rd(fdc) & FDI_DCHG; 1623 set_motor(fdc, fd->fdsu, TURNOFF); 1624 } 1625 if (unitattn && (rv = fdautoselect(dev)) != 0) 1626 return (rv); 1627 } 1628 } else { 1629 fd->ft = fd->fts + type; 1630 } 1631 fd->flags |= FD_OPEN; 1632 /* 1633 * Clearing the DMA overrun counter at open time is a bit messy. 1634 * Since we're only managing one counter per controller, opening 1635 * the second drive could mess it up. Anyway, if the DMA overrun 1636 * condition is really persistent, it will eventually time out 1637 * still. OTOH, clearing it here will ensure we'll at least start 1638 * trying again after a previous (maybe even long ago) failure. 1639 * Also, this is merely a stop-gap measure only that should not 1640 * happen during normal operation, so we can tolerate it to be a 1641 * bit sloppy about this. 1642 */ 1643 fdc->dma_overruns = 0; 1644 1645 return 0; 1646 } 1647 1648 static int 1649 fdclose(dev_t dev, int flags, int mode, struct thread *td) 1650 { 1651 fdu_t fdu = FDUNIT(minor(dev)); 1652 struct fd_data *fd; 1653 1654 fd = devclass_get_softc(fd_devclass, fdu); 1655 fd->flags &= ~(FD_OPEN | FD_NONBLOCK); 1656 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR); 1657 1658 return (0); 1659 } 1660 1661 static void 1662 fdstrategy(struct bio *bp) 1663 { 1664 long blknum, nblocks; 1665 int s; 1666 fdu_t fdu; 1667 fdc_p fdc; 1668 fd_p fd; 1669 size_t fdblk; 1670 1671 fdu = FDUNIT(minor(bp->bio_dev)); 1672 fd = devclass_get_softc(fd_devclass, fdu); 1673 if (fd == 0) 1674 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1675 (u_long)major(bp->bio_dev), (u_long)minor(bp->bio_dev)); 1676 fdc = fd->fdc; 1677 if (fd->type == FDT_NONE || fd->ft == 0) { 1678 bp->bio_error = ENXIO; 1679 bp->bio_flags |= BIO_ERROR; 1680 goto bad; 1681 } 1682 fdblk = 128 << (fd->ft->secsize); 1683 if (bp->bio_cmd != FDBIO_FORMAT && bp->bio_cmd != FDBIO_RDSECTID) { 1684 if (fd->flags & FD_NONBLOCK) { 1685 bp->bio_error = EAGAIN; 1686 bp->bio_flags |= BIO_ERROR; 1687 goto bad; 1688 } 1689 if (bp->bio_blkno < 0) { 1690 printf( 1691 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n", 1692 fdu, (u_long)bp->bio_blkno, bp->bio_bcount); 1693 bp->bio_error = EINVAL; 1694 bp->bio_flags |= BIO_ERROR; 1695 goto bad; 1696 } 1697 if ((bp->bio_bcount % fdblk) != 0) { 1698 bp->bio_error = EINVAL; 1699 bp->bio_flags |= BIO_ERROR; 1700 goto bad; 1701 } 1702 } 1703 1704 /* 1705 * Set up block calculations. 1706 */ 1707 if (bp->bio_blkno > 20000000) { 1708 /* 1709 * Reject unreasonably high block number, prevent the 1710 * multiplication below from overflowing. 1711 */ 1712 bp->bio_error = EINVAL; 1713 bp->bio_flags |= BIO_ERROR; 1714 goto bad; 1715 } 1716 blknum = bp->bio_blkno * DEV_BSIZE / fdblk; 1717 nblocks = fd->ft->size; 1718 if (blknum + bp->bio_bcount / fdblk > nblocks) { 1719 if (blknum >= nblocks) { 1720 if (bp->bio_cmd == BIO_READ) 1721 bp->bio_resid = bp->bio_bcount; 1722 else { 1723 bp->bio_error = ENOSPC; 1724 bp->bio_flags |= BIO_ERROR; 1725 } 1726 goto bad; /* not always bad, but EOF */ 1727 } 1728 bp->bio_bcount = (nblocks - blknum) * fdblk; 1729 } 1730 bp->bio_pblkno = blknum; 1731 s = splbio(); 1732 bioqdisksort(&fdc->head, bp); 1733 untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */ 1734 devstat_start_transaction(&fd->device_stats); 1735 device_busy(fd->dev); 1736 fdstart(fdc); 1737 splx(s); 1738 return; 1739 1740 bad: 1741 biodone(bp); 1742 } 1743 1744 /* 1745 * fdstart 1746 * 1747 * We have just queued something. If the controller is not busy 1748 * then simulate the case where it has just finished a command 1749 * So that it (the interrupt routine) looks on the queue for more 1750 * work to do and picks up what we just added. 1751 * 1752 * If the controller is already busy, we need do nothing, as it 1753 * will pick up our work when the present work completes. 1754 */ 1755 static void 1756 fdstart(struct fdc_data *fdc) 1757 { 1758 int s; 1759 1760 s = splbio(); 1761 if(fdc->state == DEVIDLE) 1762 { 1763 fdc_intr(fdc); 1764 } 1765 splx(s); 1766 } 1767 1768 static void 1769 fd_iotimeout(void *xfdc) 1770 { 1771 fdc_p fdc; 1772 int s; 1773 1774 fdc = xfdc; 1775 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1776 1777 /* 1778 * Due to IBM's brain-dead design, the FDC has a faked ready 1779 * signal, hardwired to ready == true. Thus, any command 1780 * issued if there's no diskette in the drive will _never_ 1781 * complete, and must be aborted by resetting the FDC. 1782 * Many thanks, Big Blue! 1783 * The FDC must not be reset directly, since that would 1784 * interfere with the state machine. Instead, pretend that 1785 * the command completed but was invalid. The state machine 1786 * will reset the FDC and retry once. 1787 */ 1788 s = splbio(); 1789 fdc->status[0] = NE7_ST0_IC_IV; 1790 fdc->flags &= ~FDC_STAT_VALID; 1791 fdc->state = IOTIMEDOUT; 1792 fdc_intr(fdc); 1793 splx(s); 1794 } 1795 1796 /* Just ensure it has the right spl. */ 1797 static void 1798 fd_pseudointr(void *xfdc) 1799 { 1800 int s; 1801 1802 s = splbio(); 1803 fdc_intr(xfdc); 1804 splx(s); 1805 } 1806 1807 /* 1808 * fdc_intr 1809 * 1810 * Keep calling the state machine until it returns a 0. 1811 * Always called at splbio. 1812 */ 1813 static void 1814 fdc_intr(void *xfdc) 1815 { 1816 fdc_p fdc = xfdc; 1817 while(fdstate(fdc)) 1818 ; 1819 } 1820 1821 /* 1822 * Magic pseudo-DMA initialization for YE FDC. Sets count and 1823 * direction. 1824 */ 1825 #define SET_BCDR(fdc,wr,cnt,port) \ 1826 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1827 ((cnt)-1) & 0xff); \ 1828 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1829 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1830 1831 /* 1832 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy. 1833 */ 1834 static int 1835 fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count) 1836 { 1837 u_char *cptr = (u_char *)addr; 1838 1839 if (flags == BIO_READ) { 1840 if (fdc->state != PIOREAD) { 1841 fdc->state = PIOREAD; 1842 return(0); 1843 } 1844 SET_BCDR(fdc, 0, count, 0); 1845 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1846 FDC_YE_DATAPORT, cptr, count); 1847 } else { 1848 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1849 FDC_YE_DATAPORT, cptr, count); 1850 SET_BCDR(fdc, 0, count, 0); 1851 } 1852 return(1); 1853 } 1854 1855 /* 1856 * Try figuring out the density of the media present in our device. 1857 */ 1858 static int 1859 fdautoselect(dev_t dev) 1860 { 1861 fdu_t fdu; 1862 fd_p fd; 1863 struct fd_type *fdtp; 1864 struct fdc_readid id; 1865 int i, n, oopts, rv; 1866 1867 fdu = FDUNIT(minor(dev)); 1868 fd = devclass_get_softc(fd_devclass, fdu); 1869 1870 switch (fd->type) { 1871 default: 1872 return (ENXIO); 1873 1874 case FDT_360K: 1875 case FDT_720K: 1876 /* no autoselection on those drives */ 1877 fd->ft = fd_native_types + fd->type; 1878 return (0); 1879 1880 case FDT_12M: 1881 fdtp = fd_searchlist_12m; 1882 n = sizeof fd_searchlist_12m / sizeof(struct fd_type); 1883 break; 1884 1885 case FDT_144M: 1886 fdtp = fd_searchlist_144m; 1887 n = sizeof fd_searchlist_144m / sizeof(struct fd_type); 1888 break; 1889 1890 case FDT_288M: 1891 fdtp = fd_searchlist_288m; 1892 n = sizeof fd_searchlist_288m / sizeof(struct fd_type); 1893 break; 1894 } 1895 1896 /* 1897 * Try reading sector ID fields, first at cylinder 0, head 0, 1898 * then at cylinder 2, head N. We don't probe cylinder 1, 1899 * since for 5.25in DD media in a HD drive, there are no data 1900 * to read (2 step pulses per media cylinder required). For 1901 * two-sided media, the second probe always goes to head 1, so 1902 * we can tell them apart from single-sided media. As a 1903 * side-effect this means that single-sided media should be 1904 * mentioned in the search list after two-sided media of an 1905 * otherwise identical density. Media with a different number 1906 * of sectors per track but otherwise identical parameters 1907 * cannot be distinguished at all. 1908 * 1909 * If we successfully read an ID field on both cylinders where 1910 * the recorded values match our expectation, we are done. 1911 * Otherwise, we try the next density entry from the table. 1912 * 1913 * Stepping to cylinder 2 has the side-effect of clearing the 1914 * unit attention bit. 1915 */ 1916 oopts = fd->options; 1917 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY; 1918 for (i = 0; i < n; i++, fdtp++) { 1919 fd->ft = fdtp; 1920 1921 id.cyl = id.head = 0; 1922 rv = fdmisccmd(dev, FDBIO_RDSECTID, &id); 1923 if (rv != 0) 1924 continue; 1925 if (id.cyl != 0 || id.head != 0 || 1926 id.secshift != fdtp->secsize) 1927 continue; 1928 id.cyl = 2; 1929 id.head = fd->ft->heads - 1; 1930 rv = fdmisccmd(dev, FDBIO_RDSECTID, &id); 1931 if (id.cyl != 2 || id.head != fdtp->heads - 1 || 1932 id.secshift != fdtp->secsize) 1933 continue; 1934 if (rv == 0) 1935 break; 1936 } 1937 1938 fd->options = oopts; 1939 if (i == n) { 1940 if (bootverbose) 1941 device_printf(fd->dev, "autoselection failed\n"); 1942 fd->ft = 0; 1943 return (EIO); 1944 } else { 1945 if (bootverbose) 1946 device_printf(fd->dev, "autoselected %d KB medium\n", 1947 fd->ft->size / 2); 1948 return (0); 1949 } 1950 } 1951 1952 1953 /* 1954 * The controller state machine. 1955 * 1956 * If it returns a non zero value, it should be called again immediately. 1957 */ 1958 static int 1959 fdstate(fdc_p fdc) 1960 { 1961 struct fdc_readid *idp; 1962 int read, format, rdsectid, cylinder, head, i, sec = 0, sectrac; 1963 int st0, cyl, st3, idf, ne7cmd, mfm, steptrac; 1964 unsigned long blknum; 1965 fdu_t fdu = fdc->fdu; 1966 fd_p fd; 1967 register struct bio *bp; 1968 struct fd_formb *finfo = NULL; 1969 size_t fdblk; 1970 1971 bp = fdc->bp; 1972 if (bp == NULL) { 1973 bp = bioq_first(&fdc->head); 1974 if (bp != NULL) { 1975 bioq_remove(&fdc->head, bp); 1976 fdc->bp = bp; 1977 } 1978 } 1979 if (bp == NULL) { 1980 /* 1981 * Nothing left for this controller to do, 1982 * force into the IDLE state. 1983 */ 1984 fdc->state = DEVIDLE; 1985 if (fdc->fd) { 1986 device_printf(fdc->fdc_dev, 1987 "unexpected valid fd pointer\n"); 1988 fdc->fd = (fd_p) 0; 1989 fdc->fdu = -1; 1990 } 1991 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1992 return (0); 1993 } 1994 fdu = FDUNIT(minor(bp->bio_dev)); 1995 fd = devclass_get_softc(fd_devclass, fdu); 1996 fdblk = 128 << fd->ft->secsize; 1997 if (fdc->fd && (fd != fdc->fd)) 1998 device_printf(fd->dev, "confused fd pointers\n"); 1999 read = bp->bio_cmd == BIO_READ; 2000 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0; 2001 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1; 2002 if (read) 2003 idf = ISADMA_READ; 2004 else 2005 idf = ISADMA_WRITE; 2006 format = bp->bio_cmd == FDBIO_FORMAT; 2007 rdsectid = bp->bio_cmd == FDBIO_RDSECTID; 2008 if (format) 2009 finfo = (struct fd_formb *)bp->bio_data; 2010 TRACE1("fd%d", fdu); 2011 TRACE1("[%s]", fdstates[fdc->state]); 2012 TRACE1("(0x%x)", fd->flags); 2013 untimeout(fd_turnoff, fd, fd->toffhandle); 2014 fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz); 2015 switch (fdc->state) 2016 { 2017 case DEVIDLE: 2018 case FINDWORK: /* we have found new work */ 2019 fdc->retry = 0; 2020 fd->skip = 0; 2021 fdc->fd = fd; 2022 fdc->fdu = fdu; 2023 fdc->fdctl_wr(fdc, fd->ft->trans); 2024 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 2025 /* 2026 * If the next drive has a motor startup pending, then 2027 * it will start up in its own good time. 2028 */ 2029 if(fd->flags & FD_MOTOR_WAIT) { 2030 fdc->state = MOTORWAIT; 2031 return (0); /* will return later */ 2032 } 2033 /* 2034 * Maybe if it's not starting, it SHOULD be starting. 2035 */ 2036 if (!(fd->flags & FD_MOTOR)) 2037 { 2038 fdc->state = MOTORWAIT; 2039 fd_turnon(fd); 2040 return (0); /* will return later */ 2041 } 2042 else /* at least make sure we are selected */ 2043 { 2044 set_motor(fdc, fd->fdsu, TURNON); 2045 } 2046 if (fdc->flags & FDC_NEEDS_RESET) { 2047 fdc->state = RESETCTLR; 2048 fdc->flags &= ~FDC_NEEDS_RESET; 2049 } else 2050 fdc->state = DOSEEK; 2051 return (1); /* will return immediately */ 2052 2053 case DOSEEK: 2054 blknum = bp->bio_pblkno + fd->skip / fdblk; 2055 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 2056 if (cylinder == fd->track) 2057 { 2058 fdc->state = SEEKCOMPLETE; 2059 return (1); /* will return immediately */ 2060 } 2061 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 2062 fd->fdsu, cylinder * steptrac, 0)) 2063 { 2064 /* 2065 * Seek command not accepted, looks like 2066 * the FDC went off to the Saints... 2067 */ 2068 fdc->retry = 6; /* try a reset */ 2069 return(retrier(fdc)); 2070 } 2071 fd->track = FD_NO_TRACK; 2072 fdc->state = SEEKWAIT; 2073 return(0); /* will return later */ 2074 2075 case SEEKWAIT: 2076 /* allow heads to settle */ 2077 timeout(fd_pseudointr, fdc, hz / 16); 2078 fdc->state = SEEKCOMPLETE; 2079 return(0); /* will return later */ 2080 2081 case SEEKCOMPLETE : /* seek done, start DMA */ 2082 blknum = bp->bio_pblkno + fd->skip / fdblk; 2083 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 2084 2085 /* Make sure seek really happened. */ 2086 if(fd->track == FD_NO_TRACK) { 2087 int descyl = cylinder * steptrac; 2088 do { 2089 /* 2090 * This might be a "ready changed" interrupt, 2091 * which cannot really happen since the 2092 * RDY pin is hardwired to + 5 volts. This 2093 * generally indicates a "bouncing" intr 2094 * line, so do one of the following: 2095 * 2096 * When running on an enhanced FDC that is 2097 * known to not go stuck after responding 2098 * with INVALID, fetch all interrupt states 2099 * until seeing either an INVALID or a 2100 * real interrupt condition. 2101 * 2102 * When running on a dumb old NE765, give 2103 * up immediately. The controller will 2104 * provide up to four dummy RC interrupt 2105 * conditions right after reset (for the 2106 * corresponding four drives), so this is 2107 * our only chance to get notice that it 2108 * was not the FDC that caused the interrupt. 2109 */ 2110 if (fd_sense_int(fdc, &st0, &cyl) 2111 == FD_NOT_VALID) 2112 return (0); /* will return later */ 2113 if(fdc->fdct == FDC_NE765 2114 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2115 return (0); /* hope for a real intr */ 2116 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2117 2118 if (0 == descyl) { 2119 int failed = 0; 2120 /* 2121 * seek to cyl 0 requested; make sure we are 2122 * really there 2123 */ 2124 if (fd_sense_drive_status(fdc, &st3)) 2125 failed = 1; 2126 if ((st3 & NE7_ST3_T0) == 0) { 2127 printf( 2128 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 2129 fdu, st3, NE7_ST3BITS); 2130 failed = 1; 2131 } 2132 2133 if (failed) { 2134 if(fdc->retry < 3) 2135 fdc->retry = 3; 2136 return (retrier(fdc)); 2137 } 2138 } 2139 2140 if (cyl != descyl) { 2141 printf( 2142 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 2143 fdu, descyl, cyl, st0); 2144 if (fdc->retry < 3) 2145 fdc->retry = 3; 2146 return (retrier(fdc)); 2147 } 2148 } 2149 2150 fd->track = cylinder; 2151 if (format) 2152 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 2153 - (char *)finfo; 2154 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2155 isa_dmastart(idf, bp->bio_data+fd->skip, 2156 format ? bp->bio_bcount : fdblk, fdc->dmachan); 2157 blknum = bp->bio_pblkno + fd->skip / fdblk; 2158 sectrac = fd->ft->sectrac; 2159 sec = blknum % (sectrac * fd->ft->heads); 2160 head = sec / sectrac; 2161 sec = sec % sectrac + 1; 2162 if (head != 0 && fd->ft->offset_side2 != 0) 2163 sec += fd->ft->offset_side2; 2164 fd->hddrv = ((head&1)<<2)+fdu; 2165 2166 if(format || !(read || rdsectid)) 2167 { 2168 /* make sure the drive is writable */ 2169 if(fd_sense_drive_status(fdc, &st3) != 0) 2170 { 2171 /* stuck controller? */ 2172 if (!(fdc->flags & FDC_NODMA)) 2173 isa_dmadone(idf, 2174 bp->bio_data + fd->skip, 2175 format ? bp->bio_bcount : fdblk, 2176 fdc->dmachan); 2177 fdc->retry = 6; /* reset the beast */ 2178 return (retrier(fdc)); 2179 } 2180 if(st3 & NE7_ST3_WP) 2181 { 2182 /* 2183 * XXX YES! this is ugly. 2184 * in order to force the current operation 2185 * to fail, we will have to fake an FDC 2186 * error - all error handling is done 2187 * by the retrier() 2188 */ 2189 fdc->status[0] = NE7_ST0_IC_AT; 2190 fdc->status[1] = NE7_ST1_NW; 2191 fdc->status[2] = 0; 2192 fdc->status[3] = fd->track; 2193 fdc->status[4] = head; 2194 fdc->status[5] = sec; 2195 fdc->retry = 8; /* break out immediately */ 2196 fdc->state = IOTIMEDOUT; /* not really... */ 2197 return (1); /* will return immediately */ 2198 } 2199 } 2200 2201 if (format) { 2202 ne7cmd = NE7CMD_FORMAT | mfm; 2203 if (fdc->flags & FDC_NODMA) { 2204 /* 2205 * This seems to be necessary for 2206 * whatever obscure reason; if we omit 2207 * it, we end up filling the sector ID 2208 * fields of the newly formatted track 2209 * entirely with garbage, causing 2210 * `wrong cylinder' errors all over 2211 * the place when trying to read them 2212 * back. 2213 * 2214 * Umpf. 2215 */ 2216 SET_BCDR(fdc, 1, bp->bio_bcount, 0); 2217 2218 (void)fdcpio(fdc,bp->bio_cmd, 2219 bp->bio_data+fd->skip, 2220 bp->bio_bcount); 2221 2222 } 2223 /* formatting */ 2224 if(fd_cmd(fdc, 6, ne7cmd, head << 2 | fdu, 2225 finfo->fd_formb_secshift, 2226 finfo->fd_formb_nsecs, 2227 finfo->fd_formb_gaplen, 2228 finfo->fd_formb_fillbyte, 0)) { 2229 /* controller fell over */ 2230 if (!(fdc->flags & FDC_NODMA)) 2231 isa_dmadone(idf, 2232 bp->bio_data + fd->skip, 2233 format ? bp->bio_bcount : fdblk, 2234 fdc->dmachan); 2235 fdc->retry = 6; 2236 return (retrier(fdc)); 2237 } 2238 } else if (rdsectid) { 2239 ne7cmd = NE7CMD_READID | mfm; 2240 if (fd_cmd(fdc, 2, ne7cmd, head << 2 | fdu, 0)) { 2241 /* controller jamming */ 2242 fdc->retry = 6; 2243 return (retrier(fdc)); 2244 } 2245 } else { 2246 /* read or write operation */ 2247 ne7cmd = (read ? NE7CMD_READ | NE7CMD_SK : NE7CMD_WRITE) | mfm; 2248 if (fdc->flags & FDC_NODMA) { 2249 /* 2250 * This seems to be necessary even when 2251 * reading data. 2252 */ 2253 SET_BCDR(fdc, 1, fdblk, 0); 2254 2255 /* 2256 * Perform the write pseudo-DMA before 2257 * the WRITE command is sent. 2258 */ 2259 if (!read) 2260 (void)fdcpio(fdc,bp->bio_cmd, 2261 bp->bio_data+fd->skip, 2262 fdblk); 2263 } 2264 if (fd_cmd(fdc, 9, 2265 ne7cmd, 2266 head << 2 | fdu, /* head & unit */ 2267 fd->track, /* track */ 2268 head, 2269 sec, /* sector + 1 */ 2270 fd->ft->secsize, /* sector size */ 2271 sectrac, /* sectors/track */ 2272 fd->ft->gap, /* gap size */ 2273 fd->ft->datalen, /* data length */ 2274 0)) { 2275 /* the beast is sleeping again */ 2276 if (!(fdc->flags & FDC_NODMA)) 2277 isa_dmadone(idf, 2278 bp->bio_data + fd->skip, 2279 format ? bp->bio_bcount : fdblk, 2280 fdc->dmachan); 2281 fdc->retry = 6; 2282 return (retrier(fdc)); 2283 } 2284 } 2285 if (!rdsectid && (fdc->flags & FDC_NODMA)) 2286 /* 2287 * If this is a read, then simply await interrupt 2288 * before performing PIO. 2289 */ 2290 if (read && !fdcpio(fdc,bp->bio_cmd, 2291 bp->bio_data+fd->skip,fdblk)) { 2292 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2293 return(0); /* will return later */ 2294 } 2295 2296 /* 2297 * Write (or format) operation will fall through and 2298 * await completion interrupt. 2299 */ 2300 fdc->state = IOCOMPLETE; 2301 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2302 return (0); /* will return later */ 2303 2304 case PIOREAD: 2305 /* 2306 * Actually perform the PIO read. The IOCOMPLETE case 2307 * removes the timeout for us. 2308 */ 2309 (void)fdcpio(fdc,bp->bio_cmd,bp->bio_data+fd->skip,fdblk); 2310 fdc->state = IOCOMPLETE; 2311 /* FALLTHROUGH */ 2312 case IOCOMPLETE: /* IO done, post-analyze */ 2313 untimeout(fd_iotimeout, fdc, fd->tohandle); 2314 2315 if (fd_read_status(fdc)) { 2316 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2317 isa_dmadone(idf, bp->bio_data + fd->skip, 2318 format ? bp->bio_bcount : fdblk, 2319 fdc->dmachan); 2320 if (fdc->retry < 6) 2321 fdc->retry = 6; /* force a reset */ 2322 return (retrier(fdc)); 2323 } 2324 2325 fdc->state = IOTIMEDOUT; 2326 2327 /* FALLTHROUGH */ 2328 case IOTIMEDOUT: 2329 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2330 isa_dmadone(idf, bp->bio_data + fd->skip, 2331 format ? bp->bio_bcount : fdblk, fdc->dmachan); 2332 if (fdc->status[0] & NE7_ST0_IC) { 2333 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2334 && fdc->status[1] & NE7_ST1_OR) { 2335 /* 2336 * DMA overrun. Someone hogged the bus and 2337 * didn't release it in time for the next 2338 * FDC transfer. 2339 * 2340 * We normally restart this without bumping 2341 * the retry counter. However, in case 2342 * something is seriously messed up (like 2343 * broken hardware), we rather limit the 2344 * number of retries so the IO operation 2345 * doesn't block indefinately. 2346 */ 2347 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 2348 fdc->state = SEEKCOMPLETE; 2349 return (1);/* will return immediately */ 2350 } /* else fall through */ 2351 } 2352 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 2353 && fdc->retry < 6) 2354 fdc->retry = 6; /* force a reset */ 2355 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2356 && fdc->status[2] & NE7_ST2_WC 2357 && fdc->retry < 3) 2358 fdc->retry = 3; /* force recalibrate */ 2359 return (retrier(fdc)); 2360 } 2361 /* All OK */ 2362 if (rdsectid) { 2363 /* copy out ID field contents */ 2364 idp = (struct fdc_readid *)bp->bio_data; 2365 idp->cyl = fdc->status[3]; 2366 idp->head = fdc->status[4]; 2367 idp->sec = fdc->status[5]; 2368 idp->secshift = fdc->status[6]; 2369 } 2370 /* Operation successful, retry DMA overruns again next time. */ 2371 fdc->dma_overruns = 0; 2372 fd->skip += fdblk; 2373 if (!rdsectid && !format && fd->skip < bp->bio_bcount) { 2374 /* set up next transfer */ 2375 fdc->state = DOSEEK; 2376 } else { 2377 /* ALL DONE */ 2378 fd->skip = 0; 2379 bp->bio_resid = 0; 2380 fdc->bp = NULL; 2381 device_unbusy(fd->dev); 2382 biofinish(bp, &fd->device_stats, 0); 2383 fdc->fd = (fd_p) 0; 2384 fdc->fdu = -1; 2385 fdc->state = FINDWORK; 2386 } 2387 return (1); /* will return immediately */ 2388 2389 case RESETCTLR: 2390 fdc_reset(fdc); 2391 fdc->retry++; 2392 fdc->state = RESETCOMPLETE; 2393 return (0); /* will return later */ 2394 2395 case RESETCOMPLETE: 2396 /* 2397 * Discard all the results from the reset so that they 2398 * can't cause an unexpected interrupt later. 2399 */ 2400 for (i = 0; i < 4; i++) 2401 (void)fd_sense_int(fdc, &st0, &cyl); 2402 fdc->state = STARTRECAL; 2403 /* FALLTHROUGH */ 2404 case STARTRECAL: 2405 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 2406 /* arrgl */ 2407 fdc->retry = 6; 2408 return (retrier(fdc)); 2409 } 2410 fdc->state = RECALWAIT; 2411 return (0); /* will return later */ 2412 2413 case RECALWAIT: 2414 /* allow heads to settle */ 2415 timeout(fd_pseudointr, fdc, hz / 8); 2416 fdc->state = RECALCOMPLETE; 2417 return (0); /* will return later */ 2418 2419 case RECALCOMPLETE: 2420 do { 2421 /* 2422 * See SEEKCOMPLETE for a comment on this: 2423 */ 2424 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2425 return (0); /* will return later */ 2426 if(fdc->fdct == FDC_NE765 2427 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2428 return (0); /* hope for a real intr */ 2429 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2430 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2431 { 2432 if(fdc->retry > 3) 2433 /* 2434 * A recalibrate from beyond cylinder 77 2435 * will "fail" due to the FDC limitations; 2436 * since people used to complain much about 2437 * the failure message, try not logging 2438 * this one if it seems to be the first 2439 * time in a line. 2440 */ 2441 printf("fd%d: recal failed ST0 %b cyl %d\n", 2442 fdu, st0, NE7_ST0BITS, cyl); 2443 if(fdc->retry < 3) fdc->retry = 3; 2444 return (retrier(fdc)); 2445 } 2446 fd->track = 0; 2447 /* Seek (probably) necessary */ 2448 fdc->state = DOSEEK; 2449 return (1); /* will return immediately */ 2450 2451 case MOTORWAIT: 2452 if(fd->flags & FD_MOTOR_WAIT) 2453 { 2454 return (0); /* time's not up yet */ 2455 } 2456 if (fdc->flags & FDC_NEEDS_RESET) { 2457 fdc->state = RESETCTLR; 2458 fdc->flags &= ~FDC_NEEDS_RESET; 2459 } else 2460 fdc->state = DOSEEK; 2461 return (1); /* will return immediately */ 2462 2463 default: 2464 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2465 if (fd_read_status(fdc) == 0) 2466 printf("FDC status :%x %x %x %x %x %x %x ", 2467 fdc->status[0], 2468 fdc->status[1], 2469 fdc->status[2], 2470 fdc->status[3], 2471 fdc->status[4], 2472 fdc->status[5], 2473 fdc->status[6] ); 2474 else 2475 printf("No status available "); 2476 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2477 { 2478 printf("[controller is dead now]\n"); 2479 return (0); /* will return later */ 2480 } 2481 printf("ST0 = %x, PCN = %x\n", st0, cyl); 2482 return (0); /* will return later */ 2483 } 2484 /* noone should ever get here */ 2485 } 2486 2487 static int 2488 retrier(struct fdc_data *fdc) 2489 { 2490 struct bio *bp; 2491 struct fd_data *fd; 2492 int fdu; 2493 2494 bp = fdc->bp; 2495 2496 /* XXX shouldn't this be cached somewhere? */ 2497 fdu = FDUNIT(minor(bp->bio_dev)); 2498 fd = devclass_get_softc(fd_devclass, fdu); 2499 if (fd->options & FDOPT_NORETRY) 2500 goto fail; 2501 2502 switch (fdc->retry) { 2503 case 0: case 1: case 2: 2504 fdc->state = SEEKCOMPLETE; 2505 break; 2506 case 3: case 4: case 5: 2507 fdc->state = STARTRECAL; 2508 break; 2509 case 6: 2510 fdc->state = RESETCTLR; 2511 break; 2512 case 7: 2513 break; 2514 default: 2515 fail: 2516 if ((fd->options & FDOPT_NOERRLOG) == 0) { 2517 disk_err(bp, "hard error", 2518 fdc->fd->skip / DEV_BSIZE, 0); 2519 if (fdc->flags & FDC_STAT_VALID) { 2520 printf( 2521 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2522 fdc->status[0], NE7_ST0BITS, 2523 fdc->status[1], NE7_ST1BITS, 2524 fdc->status[2], NE7_ST2BITS, 2525 fdc->status[3], fdc->status[4], 2526 fdc->status[5]); 2527 } 2528 else 2529 printf(" (No status)\n"); 2530 } 2531 if ((fd->options & FDOPT_NOERROR) == 0) { 2532 bp->bio_flags |= BIO_ERROR; 2533 bp->bio_error = EIO; 2534 bp->bio_resid = bp->bio_bcount - fdc->fd->skip; 2535 } else 2536 bp->bio_resid = 0; 2537 fdc->bp = NULL; 2538 fdc->fd->skip = 0; 2539 device_unbusy(fd->dev); 2540 biofinish(bp, &fdc->fd->device_stats, 0); 2541 fdc->state = FINDWORK; 2542 fdc->flags |= FDC_NEEDS_RESET; 2543 fdc->fd = (fd_p) 0; 2544 fdc->fdu = -1; 2545 return (1); 2546 } 2547 fdc->retry++; 2548 return (1); 2549 } 2550 2551 static void 2552 fdbiodone(struct bio *bp) 2553 { 2554 wakeup(bp); 2555 } 2556 2557 static int 2558 fdmisccmd(dev_t dev, u_int cmd, void *data) 2559 { 2560 fdu_t fdu; 2561 fd_p fd; 2562 struct bio *bp; 2563 struct fd_formb *finfo; 2564 struct fdc_readid *idfield; 2565 size_t fdblk; 2566 int error; 2567 2568 fdu = FDUNIT(minor(dev)); 2569 fd = devclass_get_softc(fd_devclass, fdu); 2570 fdblk = 128 << fd->ft->secsize; 2571 finfo = (struct fd_formb *)data; 2572 idfield = (struct fdc_readid *)data; 2573 2574 bp = malloc(sizeof(struct bio), M_TEMP, M_ZERO); 2575 2576 /* 2577 * Set up a bio request for fdstrategy(). bio_blkno is faked 2578 * so that fdstrategy() will seek to the the requested 2579 * cylinder, and use the desired head. 2580 */ 2581 bp->bio_cmd = cmd; 2582 if (cmd == FDBIO_FORMAT) { 2583 bp->bio_blkno = 2584 (finfo->cyl * (fd->ft->sectrac * fd->ft->heads) + 2585 finfo->head * fd->ft->sectrac) * 2586 fdblk / DEV_BSIZE; 2587 bp->bio_bcount = sizeof(struct fd_idfield_data) * 2588 finfo->fd_formb_nsecs; 2589 } else if (cmd == FDBIO_RDSECTID) { 2590 bp->bio_blkno = 2591 (idfield->cyl * (fd->ft->sectrac * fd->ft->heads) + 2592 idfield->head * fd->ft->sectrac) * 2593 fdblk / DEV_BSIZE; 2594 bp->bio_bcount = sizeof(struct fdc_readid); 2595 } else 2596 panic("wrong cmd in fdmisccmd()"); 2597 bp->bio_data = data; 2598 bp->bio_dev = dev; 2599 bp->bio_done = fdbiodone; 2600 bp->bio_flags = 0; 2601 2602 /* Now run the command. */ 2603 fdstrategy(bp); 2604 error = biowait(bp, "fdcmd"); 2605 2606 free(bp, M_TEMP); 2607 return (error); 2608 } 2609 2610 static int 2611 fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 2612 { 2613 fdu_t fdu; 2614 fd_p fd; 2615 struct fdc_status *fsp; 2616 struct fdc_readid *rid; 2617 size_t fdblk; 2618 int error, type; 2619 2620 fdu = FDUNIT(minor(dev)); 2621 type = FDTYPE(minor(dev)); 2622 fd = devclass_get_softc(fd_devclass, fdu); 2623 2624 /* 2625 * First, handle everything that could be done with 2626 * FD_NONBLOCK still being set. 2627 */ 2628 switch (cmd) { 2629 2630 case DIOCGMEDIASIZE: 2631 *(off_t *)addr = (128 << (fd->ft->secsize)) * fd->ft->size; 2632 return (0); 2633 2634 case DIOCGSECTORSIZE: 2635 *(u_int *)addr = 128 << (fd->ft->secsize); 2636 return (0); 2637 2638 case FIONBIO: 2639 if (*(int *)addr != 0) 2640 fd->flags |= FD_NONBLOCK; 2641 else { 2642 if (fd->ft == 0) { 2643 /* 2644 * No drive type has been selected yet, 2645 * cannot turn FNONBLOCK off. 2646 */ 2647 return (EINVAL); 2648 } 2649 fd->flags &= ~FD_NONBLOCK; 2650 } 2651 return (0); 2652 2653 case FIOASYNC: 2654 /* keep the generic fcntl() code happy */ 2655 return (0); 2656 2657 case FD_GTYPE: /* get drive type */ 2658 if (fd->ft == 0) 2659 /* no type known yet, return the native type */ 2660 *(struct fd_type *)addr = fd_native_types[fd->type]; 2661 else 2662 *(struct fd_type *)addr = *fd->ft; 2663 return (0); 2664 2665 case FD_STYPE: /* set drive type */ 2666 if (type == 0) { 2667 /* 2668 * Allow setting drive type temporarily iff 2669 * currently unset. Used for fdformat so any 2670 * user can set it, and then start formatting. 2671 */ 2672 if (fd->ft) 2673 return (EINVAL); /* already set */ 2674 fd->ft = fd->fts; 2675 *fd->ft = *(struct fd_type *)addr; 2676 fd->flags |= FD_UA; 2677 } else { 2678 /* 2679 * Set density definition permanently. Only 2680 * allow for superuser. 2681 */ 2682 if (suser(td) != 0) 2683 return (EPERM); 2684 fd->fts[type] = *(struct fd_type *)addr; 2685 } 2686 return (0); 2687 2688 case FD_GOPTS: /* get drive options */ 2689 *(int *)addr = fd->options + (type == 0? FDOPT_AUTOSEL: 0); 2690 return (0); 2691 2692 case FD_SOPTS: /* set drive options */ 2693 fd->options = *(int *)addr & ~FDOPT_AUTOSEL; 2694 return (0); 2695 2696 #ifdef FDC_DEBUG 2697 case FD_DEBUG: 2698 if ((fd_debug != 0) != (*(int *)addr != 0)) { 2699 fd_debug = (*(int *)addr != 0); 2700 printf("fd%d: debugging turned %s\n", 2701 fd->fdu, fd_debug ? "on" : "off"); 2702 } 2703 return (0); 2704 #endif 2705 2706 case FD_CLRERR: 2707 if (suser(td) != 0) 2708 return (EPERM); 2709 fd->fdc->fdc_errs = 0; 2710 return (0); 2711 2712 case FD_GSTAT: 2713 fsp = (struct fdc_status *)addr; 2714 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2715 return (EINVAL); 2716 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2717 return (0); 2718 2719 case FD_GDTYPE: 2720 *(enum fd_drivetype *)addr = fd->type; 2721 return (0); 2722 } 2723 2724 /* 2725 * Now handle everything else. Make sure we have a valid 2726 * drive type. 2727 */ 2728 if (fd->flags & FD_NONBLOCK) 2729 return (EAGAIN); 2730 if (fd->ft == 0) 2731 return (ENXIO); 2732 fdblk = 128 << fd->ft->secsize; 2733 error = 0; 2734 2735 switch (cmd) { 2736 2737 case FD_FORM: 2738 if ((flag & FWRITE) == 0) 2739 return (EBADF); /* must be opened for writing */ 2740 if (((struct fd_formb *)addr)->format_version != 2741 FD_FORMAT_VERSION) 2742 return (EINVAL); /* wrong version of formatting prog */ 2743 error = fdmisccmd(dev, FDBIO_FORMAT, addr); 2744 break; 2745 2746 case FD_GTYPE: /* get drive type */ 2747 *(struct fd_type *)addr = *fd->ft; 2748 break; 2749 2750 case FD_STYPE: /* set drive type */ 2751 /* this is considered harmful; only allow for superuser */ 2752 if (suser(td) != 0) 2753 return (EPERM); 2754 *fd->ft = *(struct fd_type *)addr; 2755 break; 2756 2757 case FD_GOPTS: /* get drive options */ 2758 *(int *)addr = fd->options; 2759 break; 2760 2761 case FD_SOPTS: /* set drive options */ 2762 fd->options = *(int *)addr; 2763 break; 2764 2765 #ifdef FDC_DEBUG 2766 case FD_DEBUG: 2767 if ((fd_debug != 0) != (*(int *)addr != 0)) { 2768 fd_debug = (*(int *)addr != 0); 2769 printf("fd%d: debugging turned %s\n", 2770 fd->fdu, fd_debug ? "on" : "off"); 2771 } 2772 break; 2773 #endif 2774 2775 case FD_CLRERR: 2776 if (suser(td) != 0) 2777 return (EPERM); 2778 fd->fdc->fdc_errs = 0; 2779 break; 2780 2781 case FD_GSTAT: 2782 fsp = (struct fdc_status *)addr; 2783 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2784 return (EINVAL); 2785 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2786 break; 2787 2788 case FD_READID: 2789 rid = (struct fdc_readid *)addr; 2790 if (rid->cyl > MAX_CYLINDER || rid->head > MAX_HEAD) 2791 return (EINVAL); 2792 error = fdmisccmd(dev, FDBIO_RDSECTID, addr); 2793 break; 2794 2795 default: 2796 error = ENOTTY; 2797 break; 2798 } 2799 return (error); 2800 } 2801