fdc.c revision 134113
1/*- 2 * Copyright (c) 2004 Poul-Henning Kamp 3 * Copyright (c) 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Don Ahn. 8 * 9 * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu) 10 * aided by the Linux floppy driver modifications from David Bateman 11 * (dbateman@eng.uts.edu.au). 12 * 13 * Copyright (c) 1993, 1994 by 14 * jc@irbs.UUCP (John Capo) 15 * vak@zebub.msk.su (Serge Vakulenko) 16 * ache@astral.msk.su (Andrew A. Chernov) 17 * 18 * Copyright (c) 1993, 1994, 1995 by 19 * joerg_wunsch@uriah.sax.de (Joerg Wunsch) 20 * dufault@hda.com (Peter Dufault) 21 * 22 * Copyright (c) 2001 Joerg Wunsch, 23 * joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) 24 * 25 * Redistribution and use in source and binary forms, with or without 26 * modification, are permitted provided that the following conditions 27 * are met: 28 * 1. Redistributions of source code must retain the above copyright 29 * notice, this list of conditions and the following disclaimer. 30 * 2. Redistributions in binary form must reproduce the above copyright 31 * notice, this list of conditions and the following disclaimer in the 32 * documentation and/or other materials provided with the distribution. 33 * 4. Neither the name of the University nor the names of its contributors 34 * may be used to endorse or promote products derived from this software 35 * without specific prior written permission. 36 * 37 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 38 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 40 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 41 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 42 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 43 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 45 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 46 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 47 * SUCH DAMAGE. 48 * 49 * from: @(#)fd.c 7.4 (Berkeley) 5/25/91 50 * 51 */ 52 53#include <sys/cdefs.h> 54__FBSDID("$FreeBSD: head/sys/dev/fdc/fdc.c 134113 2004-08-21 08:40:00Z phk $"); 55 56#include "opt_fdc.h" 57 58#include <sys/param.h> 59#include <sys/bio.h> 60#include <sys/bus.h> 61#include <sys/devicestat.h> 62#include <sys/disk.h> 63#include <sys/fcntl.h> 64#include <sys/fdcio.h> 65#include <sys/filio.h> 66#include <sys/kernel.h> 67#include <sys/kthread.h> 68#include <sys/lock.h> 69#include <sys/malloc.h> 70#include <sys/module.h> 71#include <sys/mutex.h> 72#include <sys/proc.h> 73#include <sys/rman.h> 74#include <sys/sysctl.h> 75#include <sys/systm.h> 76 77#include <geom/geom.h> 78 79#include <machine/bus.h> 80#include <machine/clock.h> 81#include <machine/stdarg.h> 82 83#include <isa/isavar.h> 84#include <isa/isareg.h> 85#include <dev/fdc/fdcvar.h> 86#include <isa/rtc.h> 87 88#include <dev/ic/nec765.h> 89 90/* 91 * Runtime configuration hints/flags 92 */ 93 94/* configuration flags for fd */ 95#define FD_TYPEMASK 0x0f /* drive type, matches enum 96 * fd_drivetype; on i386 machines, if 97 * given as 0, use RTC type for fd0 98 * and fd1 */ 99#define FD_NO_CHLINE 0x10 /* drive does not support changeline 100 * aka. unit attention */ 101#define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just 102 * assume it is there */ 103 104/* 105 * Things that could conceiveably considered parameters or tweakables 106 */ 107 108/* 109 * Maximal number of bytes in a cylinder. 110 * This is used for ISADMA bouncebuffer allocation and sets the max 111 * xfersize we support. 112 * 113 * 2.88M format has 2 x 36 x 512. 114 */ 115 116#define MAX_BYTES_PER_CYL (2 * 40 * 512) 117 118/* 119 * Timeout value for the PIO loops to wait until the FDC main status 120 * register matches our expectations (request for master, direction 121 * bit). This is supposed to be a number of microseconds, although 122 * timing might actually not be very accurate. 123 * 124 * Timeouts of 100 msec are believed to be required for some broken 125 * (old) hardware. 126 */ 127#define FDSTS_TIMEOUT 100000 128 129/* 130 * After this many errors, stop whining. Close will reset this count. 131 */ 132#define FDC_ERRMAX 100 /* do not log more */ 133 134/* 135 * AutoDensity search lists for each drive type. 136 */ 137 138static struct fd_type fd_searchlist_360k[] = { 139 { FDF_5_360 }, 140 { 0 } 141}; 142 143static struct fd_type fd_searchlist_12m[] = { 144 { FDF_5_1200 | FL_AUTO }, 145 { FDF_5_360 | FL_2STEP | FL_AUTO}, 146 { 0 } 147}; 148 149static struct fd_type fd_searchlist_720k[] = { 150 { FDF_3_720 }, 151 { 0 } 152}; 153 154static struct fd_type fd_searchlist_144m[] = { 155 { FDF_3_1440 | FL_AUTO}, 156 { FDF_3_720 | FL_AUTO}, 157 { 0 } 158}; 159 160static struct fd_type fd_searchlist_288m[] = { 161 { FDF_3_1440 | FL_AUTO }, 162#if 0 163 { FDF_3_2880 | FL_AUTO }, /* XXX: probably doesn't work */ 164#endif 165 { FDF_3_720 | FL_AUTO}, 166 { 0 } 167}; 168 169/* 170 * Order must match enum fd_drivetype in <sys/fdcio.h>. 171 */ 172static struct fd_type *fd_native_types[] = { 173 NULL, /* FDT_NONE */ 174 fd_searchlist_360k, /* FDT_360K */ 175 fd_searchlist_12m, /* FDT_12M */ 176 fd_searchlist_720k, /* FDT_720K */ 177 fd_searchlist_144m, /* FDT_144M */ 178 fd_searchlist_288m, /* FDT_288M */ 179}; 180 181/* 182 * Internals start here 183 */ 184 185/* registers */ 186#define FDOUT 2 /* Digital Output Register (W) */ 187#define FDO_FDSEL 0x03 /* floppy device select */ 188#define FDO_FRST 0x04 /* floppy controller reset */ 189#define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */ 190#define FDO_MOEN0 0x10 /* motor enable drive 0 */ 191#define FDO_MOEN1 0x20 /* motor enable drive 1 */ 192#define FDO_MOEN2 0x40 /* motor enable drive 2 */ 193#define FDO_MOEN3 0x80 /* motor enable drive 3 */ 194 195#define FDSTS 4 /* NEC 765 Main Status Register (R) */ 196#define FDDATA 5 /* NEC 765 Data Register (R/W) */ 197#define FDCTL 7 /* Control Register (W) */ 198 199/* 200 * this is the secret PIO data port (offset from base) 201 */ 202#define FDC_YE_DATAPORT 6 203 204#define FDI_DCHG 0x80 /* diskette has been changed */ 205 /* requires drive and motor being selected */ 206 /* is cleared by any step pulse to drive */ 207 208/* 209 * We have two private BIO commands for formatting and sector-id reading 210 */ 211#define BIO_PROBE BIO_CMD0 212#define BIO_RDID BIO_CMD1 213#define BIO_FMT BIO_CMD2 214 215/* 216 * Per drive structure (softc). 217 */ 218struct fd_data { 219 u_char *fd_ioptr; /* IO pointer */ 220 u_int fd_iosize; /* Size of IO chunks */ 221 u_int fd_iocount; /* Outstanding requests */ 222 struct fdc_data *fdc; /* pointer to controller structure */ 223 int fdsu; /* this units number on this controller */ 224 enum fd_drivetype type; /* drive type */ 225 struct fd_type *ft; /* pointer to current type descriptor */ 226 struct fd_type fts; /* type descriptors */ 227 int sectorsize; 228 int flags; 229#define FD_WP (1<<0) /* Write protected */ 230#define FD_MOTOR (1<<1) /* motor should be on */ 231#define FD_MOTORWAIT (1<<2) /* motor should be on */ 232#define FD_EMPTY (1<<3) /* no media */ 233#define FD_NEWDISK (1<<4) /* media changed */ 234#define FD_ISADMA (1<<5) /* isa dma started */ 235 int track; /* where we think the head is */ 236#define FD_NO_TRACK -2 237 int options; /* FDOPT_* */ 238 struct callout toffhandle; 239 struct callout tohandle; 240 struct g_geom *fd_geom; 241 struct g_provider *fd_provider; 242 device_t dev; 243 struct bio_queue_head fd_bq; 244}; 245 246#define FD_NOT_VALID -2 247 248static driver_intr_t fdc_intr; 249static void fdc_reset(struct fdc_data *); 250 251SYSCTL_NODE(_debug, OID_AUTO, fdc, CTLFLAG_RW, 0, "fdc driver"); 252 253static int fifo_threshold = 8; 254SYSCTL_INT(_debug_fdc, OID_AUTO, fifo, CTLFLAG_RW, &fifo_threshold, 0, 255 "FIFO threshold setting"); 256 257static int debugflags = 0; 258SYSCTL_INT(_debug_fdc, OID_AUTO, debugflags, CTLFLAG_RW, &debugflags, 0, 259 "Debug flags"); 260 261static int retries = 10; 262SYSCTL_INT(_debug_fdc, OID_AUTO, retries, CTLFLAG_RW, &retries, 0, 263 "Number of retries to attempt"); 264 265static int spec1 = 0xaf; 266SYSCTL_INT(_debug_fdc, OID_AUTO, spec1, CTLFLAG_RW, &spec1, 0, 267 "Specification byte one (step-rate + head unload)"); 268 269static int spec2 = 0x10; 270SYSCTL_INT(_debug_fdc, OID_AUTO, spec2, CTLFLAG_RW, &spec2, 0, 271 "Specification byte two (head load time + no-dma)"); 272 273static int settle; 274SYSCTL_INT(_debug_fdc, OID_AUTO, settle, CTLFLAG_RW, &settle, 0, 275 "Head settling time in sec/hz"); 276 277static void 278fdprinttype(struct fd_type *ft) 279{ 280 281 printf("(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,0x%x)", 282 ft->sectrac, ft->secsize, ft->datalen, ft->gap, ft->tracks, 283 ft->size, ft->trans, ft->heads, ft->f_gap, ft->f_inter, 284 ft->offset_side2, ft->flags); 285} 286 287static void 288fdsettype(struct fd_data *fd, struct fd_type *ft) 289{ 290 fd->ft = ft; 291 ft->size = ft->sectrac * ft->heads * ft->tracks; 292 fd->sectorsize = 128 << fd->ft->secsize; 293} 294 295/* 296 * Bus space handling (access to low-level IO). 297 */ 298static void 299fdctl_wr(struct fdc_data *fdc, u_int8_t v) 300{ 301 302 bus_space_write_1(fdc->ctlt, fdc->ctlh, fdc->ctl_off, v); 303} 304 305static void 306fdout_wr(struct fdc_data *fdc, u_int8_t v) 307{ 308 309 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 310} 311 312static u_int8_t 313fdsts_rd(struct fdc_data *fdc) 314{ 315 316 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 317} 318 319static void 320fddata_wr(struct fdc_data *fdc, u_int8_t v) 321{ 322 323 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 324} 325 326static u_int8_t 327fddata_rd(struct fdc_data *fdc) 328{ 329 330 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 331} 332 333static u_int8_t 334fdin_rd(struct fdc_data *fdc) 335{ 336 337 return bus_space_read_1(fdc->ctlt, fdc->ctlh, fdc->ctl_off); 338} 339 340static int 341fdc_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 (1); 353} 354 355/* 356 * FDC IO functions, take care of the main status register, timeout 357 * in case the desired status bits are never set. 358 * 359 * These PIO loops initially start out with short delays between 360 * each iteration in the expectation that the required condition 361 * is usually met quickly, so it can be handled immediately. 362 */ 363static int 364fdc_in(struct fdc_data *fdc, int *ptr) 365{ 366 int i, j, step; 367 368 step = 1; 369 for (j = 0; j < FDSTS_TIMEOUT; j += step) { 370 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM); 371 if (i == (NE7_DIO|NE7_RQM)) { 372 i = fddata_rd(fdc); 373 if (ptr) 374 *ptr = i; 375 return (0); 376 } 377 if (i == NE7_RQM) 378 return (fdc_err(fdc, "ready for output in input\n")); 379 step += step; 380 DELAY(step); 381 } 382 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); 383} 384 385static int 386fdc_out(struct fdc_data *fdc, int x) 387{ 388 int i, j, step; 389 390 step = 1; 391 for (j = 0; j < FDSTS_TIMEOUT; j += step) { 392 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM); 393 if (i == NE7_RQM) { 394 fddata_wr(fdc, x); 395 return (0); 396 } 397 if (i == (NE7_DIO|NE7_RQM)) 398 return (fdc_err(fdc, "ready for input in output\n")); 399 step += step; 400 DELAY(step); 401 } 402 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); 403} 404 405/* 406 * fdc_cmd: Send a command to the chip. 407 * Takes a varargs with this structure: 408 * # of output bytes 409 * output bytes as int [...] 410 * # of input bytes 411 * input bytes as int* [...] 412 */ 413static int 414fdc_cmd(struct fdc_data *fdc, int n_out, ...) 415{ 416 u_char cmd = 0; 417 int n_in; 418 int n, i; 419 va_list ap; 420 421 va_start(ap, n_out); 422 for (n = 0; n < n_out; n++) { 423 i = va_arg(ap, int); 424 if (n == 0) 425 cmd = i; 426 if (fdc_out(fdc, i) < 0) { 427 char msg[50]; 428 snprintf(msg, sizeof(msg), 429 "cmd %x failed at out byte %d of %d\n", 430 cmd, n + 1, n_out); 431 fdc->flags |= FDC_NEEDS_RESET; 432 return fdc_err(fdc, msg); 433 } 434 } 435 n_in = va_arg(ap, int); 436 for (n = 0; n < n_in; n++) { 437 int *ptr = va_arg(ap, int *); 438 if (fdc_in(fdc, ptr) < 0) { 439 char msg[50]; 440 snprintf(msg, sizeof(msg), 441 "cmd %02x failed at in byte %d of %d\n", 442 cmd, n + 1, n_in); 443 fdc->flags |= FDC_NEEDS_RESET; 444 return fdc_err(fdc, msg); 445 } 446 } 447 return (0); 448} 449 450static void 451fdc_reset(struct fdc_data *fdc) 452{ 453 int i, r[10]; 454 455 /* Try a reset, keep motor on */ 456 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 457 DELAY(100); 458 /* enable FDC, but defer interrupts a moment */ 459 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 460 DELAY(100); 461 fdout_wr(fdc, fdc->fdout); 462 463 /* XXX after a reset, silently believe the FDC will accept commands */ 464 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, spec1, spec2, 0)) 465 device_printf(fdc->fdc_dev, " SPECIFY failed in reset\n"); 466 467 if (fdc->fdct == FDC_ENHANCED) { 468 if (fdc_cmd(fdc, 4, 469 I8207X_CONFIGURE, 470 0, 471 0x40 | /* Enable Implied Seek */ 472 0x10 | /* Polling disabled */ 473 (fifo_threshold - 1), /* Fifo threshold */ 474 0x00, /* Precomp track */ 475 0)) 476 device_printf(fdc->fdc_dev, 477 " CONFIGURE failed in reset\n"); 478 if (debugflags & 1) { 479 if (fdc_cmd(fdc, 1, 480 0x0e, /* DUMPREG */ 481 10, &r[0], &r[1], &r[2], &r[3], &r[4], 482 &r[5], &r[6], &r[7], &r[8], &r[9])) 483 device_printf(fdc->fdc_dev, 484 " DUMPREG failed in reset\n"); 485 for (i = 0; i < 10; i++) 486 printf(" %02x", r[i]); 487 printf("\n"); 488 } 489 } 490} 491 492static int 493fdc_sense_drive(struct fdc_data *fdc, int *st3p) 494{ 495 int st3; 496 497 if (fdc_cmd(fdc, 2, NE7CMD_SENSED, fdc->fd->fdsu, 1, &st3)) 498 return (fdc_err(fdc, "Sense Drive Status failed\n")); 499 if (st3p) 500 *st3p = st3; 501 return (0); 502} 503 504static int 505fdc_sense_int(struct fdc_data *fdc, int *st0p, int *cylp) 506{ 507 int cyl, st0, ret; 508 509 ret = fdc_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 510 if (ret) { 511 (void)fdc_err(fdc, "sense intr err reading stat reg 0\n"); 512 return (ret); 513 } 514 515 if (st0p) 516 *st0p = st0; 517 518 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 519 /* 520 * There doesn't seem to have been an interrupt. 521 */ 522 return (FD_NOT_VALID); 523 } 524 525 if (fdc_in(fdc, &cyl) < 0) 526 return fdc_err(fdc, "can't get cyl num\n"); 527 528 if (cylp) 529 *cylp = cyl; 530 531 return (0); 532} 533 534static int 535fdc_read_status(struct fdc_data *fdc) 536{ 537 int i, ret, status; 538 539 for (i = ret = 0; i < 7; i++) { 540 ret = fdc_in(fdc, &status); 541 fdc->status[i] = status; 542 if (ret != 0) 543 break; 544 } 545 546 if (ret == 0) 547 fdc->flags |= FDC_STAT_VALID; 548 else 549 fdc->flags &= ~FDC_STAT_VALID; 550 551 return ret; 552} 553 554/* 555 * Select this drive 556 */ 557static void 558fd_select(struct fd_data *fd) 559{ 560 struct fdc_data *fdc; 561 562 /* XXX: lock controller */ 563 fdc = fd->fdc; 564 fdc->fdout &= ~FDO_FDSEL; 565 fdc->fdout |= FDO_FDMAEN | FDO_FRST | fd->fdsu; 566 fdout_wr(fdc, fdc->fdout); 567} 568 569static void 570fd_turnon(void *arg) 571{ 572 struct fd_data *fd; 573 struct bio *bp; 574 int once; 575 576 fd = arg; 577 mtx_lock(&fd->fdc->fdc_mtx); 578 fd->flags &= ~FD_MOTORWAIT; 579 fd->flags |= FD_MOTOR; 580 once = 0; 581 for (;;) { 582 bp = bioq_takefirst(&fd->fd_bq); 583 if (bp == NULL) 584 break; 585 bioq_disksort(&fd->fdc->head, bp); 586 once = 1; 587 } 588 mtx_unlock(&fd->fdc->fdc_mtx); 589 if (once) 590 wakeup(&fd->fdc->head); 591} 592 593static void 594fd_motor(struct fd_data *fd, int turnon) 595{ 596 struct fdc_data *fdc; 597 598 fdc = fd->fdc; 599/* 600 mtx_assert(&fdc->fdc_mtx, MA_OWNED); 601*/ 602 if (turnon) { 603 fd->flags |= FD_MOTORWAIT; 604 fdc->fdout |= (FDO_MOEN0 << fd->fdsu); 605 callout_reset(&fd->toffhandle, hz, fd_turnon, fd); 606 } else { 607 callout_drain(&fd->toffhandle); 608 fd->flags &= ~(FD_MOTOR|FD_MOTORWAIT); 609 fdc->fdout &= ~(FDO_MOEN0 << fd->fdsu); 610 } 611 fdout_wr(fdc, fdc->fdout); 612} 613 614static void 615fd_turnoff(void *xfd) 616{ 617 struct fd_data *fd = xfd; 618 619 mtx_lock(&fd->fdc->fdc_mtx); 620 fd_motor(fd, 0); 621 mtx_unlock(&fd->fdc->fdc_mtx); 622} 623 624/* 625 * fdc_intr 626 * 627 * Keep calling the state machine until it returns a 0. 628 */ 629static void 630fdc_intr(void *arg) 631{ 632 633 wakeup(arg); 634} 635 636/* 637 * Magic pseudo-DMA initialization for YE FDC. Sets count and 638 * direction. 639 */ 640#define SET_BCDR(fdc,wr,cnt,port) \ 641 do { \ 642 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 643 ((cnt)-1) & 0xff); \ 644 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 645 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); \ 646 } while (0) 647 648/* 649 * fdc_pio(): perform programmed IO read/write for YE PCMCIA floppy. 650 */ 651static void 652fdc_pio(struct fdc_data *fdc) 653{ 654 u_char *cptr; 655 struct bio *bp; 656 u_int count; 657 658 bp = fdc->bp; 659 cptr = fdc->fd->fd_ioptr; 660 count = fdc->fd->fd_iosize; 661 662 if (bp->bio_cmd == BIO_READ) { 663 SET_BCDR(fdc, 0, count, 0); 664 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 665 FDC_YE_DATAPORT, cptr, count); 666 } else { 667 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 668 FDC_YE_DATAPORT, cptr, count); 669 SET_BCDR(fdc, 0, count, 0); 670 } 671} 672 673static int 674fdc_biodone(struct fdc_data *fdc, int error) 675{ 676 struct fd_data *fd; 677 struct bio *bp; 678 679 fd = fdc->fd; 680 bp = fdc->bp; 681 682 mtx_lock(&fdc->fdc_mtx); 683 if (--fd->fd_iocount == 0) 684 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd); 685 fdc->bp = NULL; 686 fdc->fd = NULL; 687 mtx_unlock(&fdc->fdc_mtx); 688 if (bp->bio_to != NULL) { 689 if ((debugflags & 2) && fd->fdc->retry > 0) 690 printf("retries: %d\n", fd->fdc->retry); 691 g_io_deliver(bp, error); 692 return (0); 693 } 694 bp->bio_error = error; 695 bp->bio_flags |= BIO_DONE; 696 wakeup(bp); 697 return (0); 698} 699 700static int retry_line; 701 702static int 703fdc_worker(struct fdc_data *fdc) 704{ 705 struct fd_data *fd; 706 struct bio *bp; 707 int i, nsect; 708 int st0, st3, cyl, mfm, steptrac, cylinder, descyl, sec; 709 int head; 710 static int need_recal; 711 struct fdc_readid *idp; 712 struct fd_formb *finfo; 713 714 /* Have we exhausted our retries ? */ 715 bp = fdc->bp; 716 fd = fdc->fd; 717 if (bp != NULL && 718 (fdc->retry >= retries || (fd->flags & FDOPT_NORETRY))) { 719 if ((debugflags & 4)) 720 printf("Too many retries (EIO)\n"); 721 return (fdc_biodone(fdc, EIO)); 722 } 723 724 /* Disable ISADMA if we bailed while it was active */ 725 if (fd != NULL && (fd->flags & FD_ISADMA)) { 726 mtx_lock(&Giant); 727 isa_dmadone( 728 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE, 729 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan); 730 mtx_unlock(&Giant); 731 fd->flags &= ~FD_ISADMA; 732 } 733 734 /* Unwedge the controller ? */ 735 if (fdc->flags & FDC_NEEDS_RESET) { 736 fdc->flags &= ~FDC_NEEDS_RESET; 737 fdc_reset(fdc); 738 msleep(fdc, NULL, PRIBIO, "fdcrst", hz); 739 /* Discard results */ 740 for (i = 0; i < 4; i++) 741 fdc_sense_int(fdc, &st0, &cyl); 742 /* All drives must recal */ 743 need_recal = 0xf; 744 } 745 746 /* Pick up a request, if need be wait for it */ 747 if (fdc->bp == NULL) { 748 mtx_lock(&fdc->fdc_mtx); 749 do { 750 fdc->bp = bioq_takefirst(&fdc->head); 751 if (fdc->bp == NULL) 752 msleep(&fdc->head, &fdc->fdc_mtx, 753 PRIBIO, "-", hz); 754 } while (fdc->bp == NULL); 755 mtx_unlock(&fdc->fdc_mtx); 756 bp = fdc->bp; 757 fd = fdc->fd = bp->bio_driver1; 758 fdc->retry = 0; 759 fd->fd_ioptr = bp->bio_data; 760 if (bp->bio_cmd & BIO_FMT) { 761 i = offsetof(struct fd_formb, fd_formb_cylno(0)); 762 fd->fd_ioptr += i; 763 fd->fd_iosize = bp->bio_length - i; 764 } 765 } 766 767 /* Select drive, setup params */ 768 fd_select(fd); 769 fdctl_wr(fdc, fd->ft->trans); 770 771 if (bp->bio_cmd & BIO_PROBE) { 772 773 if (!(fdin_rd(fdc) & FDI_DCHG) && !(fd->flags & FD_EMPTY)) 774 return (fdc_biodone(fdc, 0)); 775 776 /* 777 * Try to find out if we have a disk in the drive 778 * 779 * First recal, then seek to cyl#1, this clears the 780 * old condition on the disk change line so we can 781 * examine it for current status 782 */ 783 if (debugflags & 0x40) 784 printf("New disk in probe\n"); 785 fd->flags |= FD_NEWDISK; 786 retry_line = __LINE__; 787 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0)) 788 return (1); 789 msleep(fdc, NULL, PRIBIO, "fdrecal", hz); 790 retry_line = __LINE__; 791 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 792 return (1); /* XXX */ 793 retry_line = __LINE__; 794 if ((st0 & 0xc0) || cyl != 0) 795 return (1); 796 797 /* Seek to track 1 */ 798 retry_line = __LINE__; 799 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, 1, 0)) 800 return (1); 801 msleep(fdc, NULL, PRIBIO, "fdseek", hz); 802 retry_line = __LINE__; 803 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 804 return (1); /* XXX */ 805 need_recal |= (1 << fd->fdsu); 806 if (fdin_rd(fdc) & FDI_DCHG) { 807 if (debugflags & 0x40) 808 printf("Empty in probe\n"); 809 fd->flags |= FD_EMPTY; 810 } else { 811 if (debugflags & 0x40) 812 printf("Got disk in probe\n"); 813 fd->flags &= ~FD_EMPTY; 814 retry_line = __LINE__; 815 if(fdc_sense_drive(fdc, &st3) != 0) 816 return (1); 817 if(st3 & NE7_ST3_WP) 818 fd->flags |= FD_WP; 819 else 820 fd->flags &= ~FD_WP; 821 } 822 return (fdc_biodone(fdc, 0)); 823 } 824 825 /* 826 * If we are dead just flush the requests 827 */ 828 if (fd->flags & FD_EMPTY) 829 return (fdc_biodone(fdc, ENXIO)); 830 831 /* Check if we lost our media */ 832 if (fdin_rd(fdc) & FDI_DCHG) { 833 if (debugflags & 0x40) 834 printf("Lost disk\n"); 835 fd->flags |= FD_EMPTY; 836 fd->flags |= FD_NEWDISK; 837 g_topology_lock(); 838 g_orphan_provider(fd->fd_provider, EXDEV); 839 fd->fd_provider->flags |= G_PF_WITHER; 840 fd->fd_provider = 841 g_new_providerf(fd->fd_geom, fd->fd_geom->name); 842 g_error_provider(fd->fd_provider, 0); 843 g_topology_unlock(); 844 return (fdc_biodone(fdc, ENXIO)); 845 } 846 847 /* Check if the floppy is write-protected */ 848 if(bp->bio_cmd & (BIO_FMT | BIO_WRITE)) { 849 retry_line = __LINE__; 850 if(fdc_sense_drive(fdc, &st3) != 0) 851 return (1); 852 if(st3 & NE7_ST3_WP) 853 return (fdc_biodone(fdc, EROFS)); 854 } 855 856 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0; 857 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1; 858 i = fd->ft->sectrac * fd->ft->heads; 859 cylinder = bp->bio_pblkno / i; 860 descyl = cylinder * steptrac; 861 sec = bp->bio_pblkno % i; 862 nsect = i - sec; 863 head = sec / fd->ft->sectrac; 864 sec = sec % fd->ft->sectrac + 1; 865 866 /* If everything is going swimmingly, use multisector xfer */ 867 if (fdc->retry == 0 && bp->bio_cmd & (BIO_READ|BIO_WRITE)) { 868 fd->fd_iosize = imin(nsect * fd->sectorsize, bp->bio_resid); 869 nsect = fd->fd_iosize / fd->sectorsize; 870 } else if (bp->bio_cmd & (BIO_READ|BIO_WRITE)) { 871 fd->fd_iosize = fd->sectorsize; 872 nsect = 1; 873 } 874 875 /* Do RECAL if we need to or are going to track zero anyway */ 876 if ((need_recal & (1 << fd->fdsu)) || 877 (cylinder == 0 && fd->track != 0) || 878 fdc->retry > 2) { 879 retry_line = __LINE__; 880 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0)) 881 return (1); 882 msleep(fdc, NULL, PRIBIO, "fdrecal", hz); 883 retry_line = __LINE__; 884 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 885 return (1); /* XXX */ 886 retry_line = __LINE__; 887 if ((st0 & 0xc0) || cyl != 0) 888 return (1); 889 need_recal &= ~(1 << fd->fdsu); 890 fd->track = 0; 891 /* let the heads settle */ 892 if (settle) 893 msleep(fdc->fd, NULL, PRIBIO, "fdhdstl", settle); 894 } 895 896 /* 897 * SEEK to where we want to be 898 * 899 * Enhanced controllers do implied seeks for read&write as long as 900 * we do not need multiple steps per track. 901 */ 902 if (cylinder != fd->track && ( 903 fdc->fdct != FDC_ENHANCED || 904 descyl != cylinder || 905 (bp->bio_cmd & (BIO_RDID|BIO_FMT)))) { 906 retry_line = __LINE__; 907 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, descyl, 0)) 908 return (1); 909 msleep(fdc, NULL, PRIBIO, "fdseek", hz); 910 retry_line = __LINE__; 911 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 912 return (1); /* XXX */ 913 retry_line = __LINE__; 914 if ((st0 & 0xc0) || cyl != descyl) { 915 need_recal |= (1 << fd->fdsu); 916 return (1); 917 } 918 /* let the heads settle */ 919 if (settle) 920 msleep(fdc->fd, NULL, PRIBIO, "fdhdstl", settle); 921 } 922 fd->track = cylinder; 923 924 if (debugflags & 8) 925 printf("op %x bn %ju siz %u ptr %p retry %d\n", 926 bp->bio_cmd, bp->bio_pblkno, fd->fd_iosize, 927 fd->fd_ioptr, fdc->retry); 928 929 /* Setup ISADMA if we need it and have it */ 930 if ((bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_FMT)) 931 && !(fdc->flags & FDC_NODMA)) { 932 mtx_lock(&Giant); 933 isa_dmastart( 934 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE, 935 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan); 936 mtx_unlock(&Giant); 937 fd->flags |= FD_ISADMA; 938 } 939 940 /* Do PIO if we have to */ 941 if (fdc->flags & FDC_NODMA) { 942 if (bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_FMT)) 943 SET_BCDR(fdc, 1, fd->fd_iosize, 0); 944 if (bp->bio_cmd & (BIO_WRITE|BIO_FMT)) 945 fdc_pio(fdc); 946 } 947 948 switch(bp->bio_cmd) { 949 case BIO_FMT: 950 /* formatting */ 951 finfo = (struct fd_formb *)bp->bio_data; 952 retry_line = __LINE__; 953 if (fdc_cmd(fdc, 6, 954 NE7CMD_FORMAT | mfm, 955 head << 2 | fd->fdsu, 956 finfo->fd_formb_secshift, 957 finfo->fd_formb_nsecs, 958 finfo->fd_formb_gaplen, 959 finfo->fd_formb_fillbyte, 0)) 960 return (1); 961 break; 962 case BIO_RDID: 963 retry_line = __LINE__; 964 if (fdc_cmd(fdc, 2, 965 NE7CMD_READID | mfm, 966 head << 2 | fd->fdsu, 0)) 967 return (1); 968 break; 969 case BIO_READ: 970 retry_line = __LINE__; 971 if (fdc_cmd(fdc, 9, 972 NE7CMD_READ | NE7CMD_SK | mfm | NE7CMD_MT, 973 head << 2 | fd->fdsu, /* head & unit */ 974 fd->track, /* track */ 975 head, /* head */ 976 sec, /* sector + 1 */ 977 fd->ft->secsize, /* sector size */ 978 fd->ft->sectrac, /* sectors/track */ 979 fd->ft->gap, /* gap size */ 980 fd->ft->datalen, /* data length */ 981 0)) 982 return (1); 983 break; 984 case BIO_WRITE: 985 retry_line = __LINE__; 986 if (fdc_cmd(fdc, 9, 987 NE7CMD_WRITE | mfm | NE7CMD_MT, 988 head << 2 | fd->fdsu, /* head & unit */ 989 fd->track, /* track */ 990 head, /* head */ 991 sec, /* sector + 1 */ 992 fd->ft->secsize, /* sector size */ 993 fd->ft->sectrac, /* sectors/track */ 994 fd->ft->gap, /* gap size */ 995 fd->ft->datalen, /* data length */ 996 0)) 997 return (1); 998 break; 999 default: 1000 KASSERT(0 == 1, ("Wrong bio_cmd %x\n", bp->bio_cmd)); 1001 } 1002 1003 /* Wait for interrupt */ 1004 i = msleep(fdc, NULL, PRIBIO, "fddata", hz); 1005 1006 /* PIO if the read looks good */ 1007 if (i == 0 && (fdc->flags & FDC_NODMA) && (bp->bio_cmd & BIO_READ)) 1008 fdc_pio(fdc); 1009 1010 /* Finish DMA */ 1011 if (fd->flags & FD_ISADMA) { 1012 mtx_lock(&Giant); 1013 isa_dmadone( 1014 bp->bio_cmd & BIO_READ ? ISADMA_READ : ISADMA_WRITE, 1015 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan); 1016 mtx_unlock(&Giant); 1017 fd->flags &= ~FD_ISADMA; 1018 } 1019 1020 if (i != 0) { 1021 /* 1022 * Timeout. 1023 * 1024 * Due to IBM's brain-dead design, the FDC has a faked ready 1025 * signal, hardwired to ready == true. Thus, any command 1026 * issued if there's no diskette in the drive will _never_ 1027 * complete, and must be aborted by resetting the FDC. 1028 * Many thanks, Big Blue! 1029 */ 1030 retry_line = __LINE__; 1031 fdc->flags |= FDC_NEEDS_RESET; 1032 return (1); 1033 } 1034 1035 retry_line = __LINE__; 1036 if (fdc_read_status(fdc)) 1037 return (1); 1038 1039 if (debugflags & 0x10) 1040 printf(" -> %x %x %x %x\n", 1041 fdc->status[0], fdc->status[1], 1042 fdc->status[2], fdc->status[3]); 1043 1044 st0 = fdc->status[0] & NE7_ST0_IC; 1045 if (st0 != 0) { 1046 retry_line = __LINE__; 1047 if (st0 == NE7_ST0_IC_AT && fdc->status[1] & NE7_ST1_OR) { 1048 /* 1049 * DMA overrun. Someone hogged the bus and 1050 * didn't release it in time for the next 1051 * FDC transfer. 1052 */ 1053 return (1); 1054 } 1055 retry_line = __LINE__; 1056 if(st0 == NE7_ST0_IC_IV) { 1057 fdc->flags |= FDC_NEEDS_RESET; 1058 return (1); 1059 } 1060 retry_line = __LINE__; 1061 if(st0 == NE7_ST0_IC_AT && fdc->status[2] & NE7_ST2_WC) { 1062 need_recal |= (1 << fd->fdsu); 1063 return (1); 1064 } 1065 if (debugflags & 0x20) { 1066 printf("status %02x %02x %02x %02x %02x %02x\n", 1067 fdc->status[0], fdc->status[1], fdc->status[2], 1068 fdc->status[3], fdc->status[4], fdc->status[5]); 1069 } 1070 retry_line = __LINE__; 1071 return (1); 1072 } 1073 /* All OK */ 1074 switch(bp->bio_cmd) { 1075 case BIO_RDID: 1076 /* copy out ID field contents */ 1077 idp = (struct fdc_readid *)bp->bio_data; 1078 idp->cyl = fdc->status[3]; 1079 idp->head = fdc->status[4]; 1080 idp->sec = fdc->status[5]; 1081 idp->secshift = fdc->status[6]; 1082 if (debugflags & 0x40) 1083 printf("c %d h %d s %d z %d\n", 1084 idp->cyl, idp->head, idp->sec, idp->secshift); 1085 break; 1086 case BIO_READ: 1087 case BIO_WRITE: 1088 bp->bio_pblkno += nsect; 1089 bp->bio_resid -= fd->fd_iosize; 1090 bp->bio_completed += fd->fd_iosize; 1091 fd->fd_ioptr += fd->fd_iosize; 1092 /* Since we managed to get something done, reset the retry */ 1093 fdc->retry = 0; 1094 if (bp->bio_resid > 0) 1095 return (0); 1096 break; 1097 case BIO_FMT: 1098 break; 1099 } 1100 return (fdc_biodone(fdc, 0)); 1101} 1102 1103static void 1104fdc_thread(void *arg) 1105{ 1106 struct fdc_data *fdc; 1107 1108 fdc = arg; 1109 int i; 1110 1111 for (;;) { 1112 i = fdc_worker(fdc); 1113 if (i && debugflags & 0x20) { 1114 if (fdc->bp != NULL) { 1115 g_print_bio(fdc->bp); 1116 printf("\n"); 1117 } 1118 printf("Retry line %d\n", retry_line); 1119 } 1120 fdc->retry += i; 1121 } 1122} 1123 1124/* 1125 * Enqueue a requst. 1126 */ 1127static void 1128fd_enqueue(struct fd_data *fd, struct bio *bp) 1129{ 1130 struct fdc_data *fdc; 1131 int call; 1132 1133 call = 0; 1134 fdc = fd->fdc; 1135 mtx_lock(&fdc->fdc_mtx); 1136 /* If we go from idle, cancel motor turnoff */ 1137 if (fd->fd_iocount++ == 0) 1138 callout_drain(&fd->toffhandle); 1139 if (fd->flags & FD_MOTOR) { 1140 /* The motor is on, send it directly to the controller */ 1141 bioq_disksort(&fdc->head, bp); 1142 wakeup(&fdc->head); 1143 } else { 1144 /* Queue it on the drive until the motor has started */ 1145 bioq_insert_tail(&fd->fd_bq, bp); 1146 if (!(fd->flags & FD_MOTORWAIT)) 1147 fd_motor(fd, 1); 1148 } 1149 mtx_unlock(&fdc->fdc_mtx); 1150} 1151 1152static int 1153fdmisccmd(struct fd_data *fd, u_int cmd, void *data) 1154{ 1155 struct bio *bp; 1156 struct fd_formb *finfo; 1157 struct fdc_readid *idfield; 1158 int error; 1159 1160 bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO); 1161 1162 /* 1163 * Set up a bio request for fdstrategy(). bio_offset is faked 1164 * so that fdstrategy() will seek to the the requested 1165 * cylinder, and use the desired head. 1166 */ 1167 bp->bio_cmd = cmd; 1168 if (cmd == BIO_FMT) { 1169 finfo = (struct fd_formb *)data; 1170 bp->bio_pblkno = 1171 (finfo->cyl * fd->ft->heads + finfo->head) * 1172 fd->ft->sectrac; 1173 bp->bio_length = sizeof *finfo; 1174 } else if (cmd == BIO_RDID) { 1175 idfield = (struct fdc_readid *)data; 1176 bp->bio_pblkno = 1177 (idfield->cyl * fd->ft->heads + idfield->head) * 1178 fd->ft->sectrac; 1179 bp->bio_length = sizeof(struct fdc_readid); 1180 } else if (cmd == BIO_PROBE) { 1181 /* nothing */ 1182 } else 1183 panic("wrong cmd in fdmisccmd()"); 1184 bp->bio_offset = bp->bio_pblkno * fd->sectorsize; 1185 bp->bio_data = data; 1186 bp->bio_driver1 = fd; 1187 bp->bio_flags = 0; 1188 1189 fd_enqueue(fd, bp); 1190 1191 do { 1192 msleep(bp, NULL, PRIBIO, "fdwait", hz); 1193 } while (!(bp->bio_flags & BIO_DONE)); 1194 error = bp->bio_error; 1195 1196 free(bp, M_TEMP); 1197 return (error); 1198} 1199 1200/* 1201 * Try figuring out the density of the media present in our device. 1202 */ 1203static int 1204fdautoselect(struct fd_data *fd) 1205{ 1206 struct fd_type *fdtp; 1207 struct fdc_readid id; 1208 int oopts, rv; 1209 1210 if (!(fd->ft->flags & FL_AUTO)) 1211 return (0); 1212 1213 fdtp = fd_native_types[fd->type]; 1214 fdsettype(fd, fdtp); 1215 if (!(fd->ft->flags & FL_AUTO)) 1216 return (0); 1217 1218 /* 1219 * Try reading sector ID fields, first at cylinder 0, head 0, 1220 * then at cylinder 2, head N. We don't probe cylinder 1, 1221 * since for 5.25in DD media in a HD drive, there are no data 1222 * to read (2 step pulses per media cylinder required). For 1223 * two-sided media, the second probe always goes to head 1, so 1224 * we can tell them apart from single-sided media. As a 1225 * side-effect this means that single-sided media should be 1226 * mentioned in the search list after two-sided media of an 1227 * otherwise identical density. Media with a different number 1228 * of sectors per track but otherwise identical parameters 1229 * cannot be distinguished at all. 1230 * 1231 * If we successfully read an ID field on both cylinders where 1232 * the recorded values match our expectation, we are done. 1233 * Otherwise, we try the next density entry from the table. 1234 * 1235 * Stepping to cylinder 2 has the side-effect of clearing the 1236 * unit attention bit. 1237 */ 1238 oopts = fd->options; 1239 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY; 1240 for (; fdtp->heads; fdtp++) { 1241 fdsettype(fd, fdtp); 1242 1243 id.cyl = id.head = 0; 1244 rv = fdmisccmd(fd, BIO_RDID, &id); 1245 if (rv != 0) 1246 continue; 1247 if (id.cyl != 0 || id.head != 0 || id.secshift != fdtp->secsize) 1248 continue; 1249 id.cyl = 2; 1250 id.head = fd->ft->heads - 1; 1251 rv = fdmisccmd(fd, BIO_RDID, &id); 1252 if (id.cyl != 2 || id.head != fdtp->heads - 1 || 1253 id.secshift != fdtp->secsize) 1254 continue; 1255 if (rv == 0) 1256 break; 1257 } 1258 1259 fd->options = oopts; 1260 if (fdtp->heads == 0) { 1261 if (debugflags & 0x40) 1262 device_printf(fd->dev, "autoselection failed\n"); 1263 fdsettype(fd, fd_native_types[fd->type]); 1264 return (0); 1265 } else { 1266 if (debugflags & 0x40) { 1267 device_printf(fd->dev, 1268 "autoselected %d KB medium\n", fd->ft->size / 2); 1269 fdprinttype(fd->ft); 1270 } 1271 return (0); 1272 } 1273} 1274 1275/* 1276 * GEOM class implementation 1277 */ 1278 1279static g_access_t fd_access; 1280static g_start_t fd_start; 1281static g_ioctl_t fd_ioctl; 1282 1283struct g_class g_fd_class = { 1284 .name = "FD", 1285 .version = G_VERSION, 1286 .start = fd_start, 1287 .access = fd_access, 1288 .ioctl = fd_ioctl, 1289}; 1290 1291DECLARE_GEOM_CLASS(g_fd_class, g_fd); 1292 1293static int 1294fd_access(struct g_provider *pp, int r, int w, int e) 1295{ 1296 struct fd_data *fd; 1297 struct fdc_data *fdc; 1298 int ar, aw, ae; 1299 1300 fd = pp->geom->softc; 1301 fdc = fd->fdc; 1302 1303 /* 1304 * If our provider is withering, we can only get negative requests 1305 * and we don't want to even see them 1306 */ 1307 if (pp->flags & G_PF_WITHER) 1308 return (0); 1309 1310 ar = r + pp->acr; 1311 aw = w + pp->acw; 1312 ae = e + pp->ace; 1313 1314 if (ar == 0 && aw == 0 && ae == 0) { 1315 device_unbusy(fd->dev); 1316 if (!(fdc->flags & FDC_NODMA) && --fdc->dmacnt == 0) { 1317 mtx_lock(&Giant); 1318 isa_dma_release(fdc->dmachan); 1319 mtx_unlock(&Giant); 1320 } 1321 return (0); 1322 } 1323 1324 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) { 1325 if (fdmisccmd(fd, BIO_PROBE, NULL)) 1326 return (ENXIO); 1327 if (fd->flags & FD_EMPTY) 1328 return (ENXIO); 1329 if (fd->flags & FD_NEWDISK) { 1330 fdautoselect(fd); 1331 fd->flags &= ~FD_NEWDISK; 1332 } 1333 device_busy(fd->dev); 1334 if (!(fdc->flags & FDC_NODMA) && fdc->dmacnt++ == 0) { 1335 mtx_lock(&Giant); 1336 isa_dma_acquire(fdc->dmachan); 1337 isa_dmainit(fdc->dmachan, MAX_BYTES_PER_CYL); 1338 mtx_unlock(&Giant); 1339 } 1340 } 1341 1342#ifdef notyet 1343 if (w > 0 && (fd->flags & FD_WP)) 1344 return (EROFS); 1345#endif 1346 1347 pp->sectorsize = fd->sectorsize; 1348 pp->stripesize = fd->ft->heads * fd->ft->sectrac * fd->sectorsize; 1349 pp->mediasize = pp->stripesize * fd->ft->tracks; 1350 return (0); 1351} 1352 1353static void 1354fd_start(struct bio *bp) 1355{ 1356 struct fdc_data * fdc; 1357 struct fd_data * fd; 1358 1359 fd = bp->bio_to->geom->softc; 1360 fdc = fd->fdc; 1361 bp->bio_driver1 = fd; 1362 if (bp->bio_cmd & BIO_GETATTR) { 1363 if (g_handleattr_int(bp, "GEOM::fwsectors", fd->ft->sectrac)) 1364 return; 1365 if (g_handleattr_int(bp, "GEOM::fwheads", fd->ft->heads)) 1366 return; 1367 g_io_deliver(bp, ENOIOCTL); 1368 return; 1369 } 1370 if (!(bp->bio_cmd & (BIO_READ|BIO_WRITE))) { 1371 g_io_deliver(bp, EOPNOTSUPP); 1372 return; 1373 } 1374 bp->bio_pblkno = bp->bio_offset / fd->sectorsize; 1375 bp->bio_resid = bp->bio_length; 1376 fd_enqueue(fd, bp); 1377 return; 1378} 1379 1380static int 1381fd_ioctl(struct g_provider *pp, u_long cmd, void *data, struct thread *td) 1382{ 1383 struct fd_data *fd; 1384 struct fdc_status *fsp; 1385 struct fdc_readid *rid; 1386 int error; 1387 1388 fd = pp->geom->softc; 1389 1390 switch (cmd) { 1391 case FD_GTYPE: /* get drive type */ 1392 *(struct fd_type *)data = *fd->ft; 1393 return (0); 1394 1395 case FD_STYPE: /* set drive type */ 1396 /* 1397 * Allow setting drive type temporarily iff 1398 * currently unset. Used for fdformat so any 1399 * user can set it, and then start formatting. 1400 */ 1401 fd->fts = *(struct fd_type *)data; 1402 if (fd->fts.sectrac) { 1403 /* XXX: check for rubbish */ 1404 fdsettype(fd, &fd->fts); 1405 } else { 1406 fdsettype(fd, fd_native_types[fd->type]); 1407 } 1408 if (debugflags & 0x40) 1409 fdprinttype(fd->ft); 1410 return (0); 1411 1412 case FD_GOPTS: /* get drive options */ 1413 *(int *)data = fd->options; 1414 return (0); 1415 1416 case FD_SOPTS: /* set drive options */ 1417 fd->options = *(int *)data; 1418 return (0); 1419 1420 case FD_CLRERR: 1421 if (suser(td) != 0) 1422 return (EPERM); 1423 fd->fdc->fdc_errs = 0; 1424 return (0); 1425 1426 case FD_GSTAT: 1427 fsp = (struct fdc_status *)data; 1428 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 1429 return (EINVAL); 1430 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 1431 return (0); 1432 1433 case FD_GDTYPE: 1434 *(enum fd_drivetype *)data = fd->type; 1435 return (0); 1436 1437 case FD_FORM: 1438 if (((struct fd_formb *)data)->format_version != 1439 FD_FORMAT_VERSION) 1440 return (EINVAL); /* wrong version of formatting prog */ 1441 error = fdmisccmd(fd, BIO_FMT, data); 1442 fd->flags |= FD_NEWDISK; 1443 break; 1444 1445 case FD_READID: 1446 rid = (struct fdc_readid *)data; 1447 if (rid->cyl > 85 || rid->head > 1) 1448 return (EINVAL); 1449 error = fdmisccmd(fd, BIO_RDID, data); 1450 break; 1451 1452 case FIONBIO: 1453 case FIOASYNC: 1454 /* For backwards compat with old fd*(8) tools */ 1455 error = 0; 1456 break; 1457 1458 default: 1459 if (debugflags & 0x80) 1460 printf("Unknown ioctl %lx\n", cmd); 1461 error = ENOIOCTL; 1462 break; 1463 } 1464 return (error); 1465}; 1466 1467 1468 1469/* 1470 * Configuration/initialization stuff, per controller. 1471 */ 1472 1473devclass_t fdc_devclass; 1474static devclass_t fd_devclass; 1475 1476struct fdc_ivars { 1477 int fdunit; 1478 int fdtype; 1479}; 1480 1481void 1482fdc_release_resources(struct fdc_data *fdc) 1483{ 1484 device_t dev; 1485 1486 dev = fdc->fdc_dev; 1487 if (fdc->fdc_intr) { 1488 BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq, 1489 fdc->fdc_intr); 1490 fdc->fdc_intr = NULL; 1491 } 1492 if (fdc->res_irq != 0) { 1493 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 1494 fdc->res_irq); 1495 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 1496 fdc->res_irq); 1497 fdc->res_irq = NULL; 1498 } 1499 if (fdc->res_ctl != 0) { 1500 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 1501 fdc->res_ctl); 1502 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 1503 fdc->res_ctl); 1504 fdc->res_ctl = NULL; 1505 } 1506 if (fdc->res_ioport != 0) { 1507 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 1508 fdc->res_ioport); 1509 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 1510 fdc->res_ioport); 1511 fdc->res_ioport = NULL; 1512 } 1513 if (fdc->res_drq != 0) { 1514 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 1515 fdc->res_drq); 1516 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 1517 fdc->res_drq); 1518 fdc->res_drq = NULL; 1519 } 1520} 1521 1522int 1523fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 1524{ 1525 struct fdc_ivars *ivars = device_get_ivars(child); 1526 1527 switch (which) { 1528 case FDC_IVAR_FDUNIT: 1529 *result = ivars->fdunit; 1530 break; 1531 case FDC_IVAR_FDTYPE: 1532 *result = ivars->fdtype; 1533 break; 1534 default: 1535 return (ENOENT); 1536 } 1537 return (0); 1538} 1539 1540int 1541fdc_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 1542{ 1543 struct fdc_ivars *ivars = device_get_ivars(child); 1544 1545 switch (which) { 1546 case FDC_IVAR_FDUNIT: 1547 ivars->fdunit = value; 1548 break; 1549 case FDC_IVAR_FDTYPE: 1550 ivars->fdtype = value; 1551 break; 1552 default: 1553 return (ENOENT); 1554 } 1555 return (0); 1556} 1557 1558int 1559fdc_initial_reset(device_t dev, struct fdc_data *fdc) 1560{ 1561 int ic_type, part_id; 1562 1563 /* 1564 * A status value of 0xff is very unlikely, but not theoretically 1565 * impossible, but it is far more likely to indicate an empty bus. 1566 */ 1567 if (fdsts_rd(fdc) == 0xff) 1568 return (ENXIO); 1569 1570 /* 1571 * Assert a reset to the floppy controller and check that the status 1572 * register goes to zero. 1573 */ 1574 fdout_wr(fdc, 0); 1575 fdout_wr(fdc, 0); 1576 if (fdsts_rd(fdc) != 0) 1577 return (ENXIO); 1578 1579 /* 1580 * Clear the reset and see it come ready. 1581 */ 1582 fdout_wr(fdc, FDO_FRST); 1583 DELAY(100); 1584 if (fdsts_rd(fdc) != 0x80) 1585 return (ENXIO); 1586 1587 /* Then, see if it can handle a command. */ 1588 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, 0xaf, 0x1e, 0)) 1589 return (ENXIO); 1590 1591 /* 1592 * Try to identify the chip. 1593 * 1594 * The i8272 datasheet documents that unknown commands 1595 * will return ST0 as 0x80. The i8272 is supposedly identical 1596 * to the NEC765. 1597 * The i82077SL datasheet says 0x90 for the VERSION command, 1598 * and several "superio" chips emulate this. 1599 */ 1600 if (fdc_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type)) 1601 return (ENXIO); 1602 if (fdc_cmd(fdc, 1, 0x18, 1, &part_id)) 1603 return (ENXIO); 1604 device_printf(dev, "ic_type %02x part_id %02x\n", ic_type, part_id); 1605 switch (ic_type & 0xff) { 1606 case 0x80: 1607 device_set_desc(dev, "NEC 765 or clone"); 1608 fdc->fdct = FDC_NE765; 1609 break; 1610 case 0x81: 1611 case 0x90: 1612 device_set_desc(dev, 1613 "Enhanced floppy controller"); 1614 fdc->fdct = FDC_ENHANCED; 1615 break; 1616 default: 1617 device_set_desc(dev, "Generic floppy controller"); 1618 fdc->fdct = FDC_UNKNOWN; 1619 break; 1620 } 1621 return (0); 1622} 1623 1624int 1625fdc_detach(device_t dev) 1626{ 1627 struct fdc_data *fdc; 1628 int error; 1629 1630 fdc = device_get_softc(dev); 1631 1632 /* have our children detached first */ 1633 if ((error = bus_generic_detach(dev))) 1634 return (error); 1635 1636 /* XXX: kill thread */ 1637 /* reset controller, turn motor off */ 1638 fdout_wr(fdc, 0); 1639 1640 fdc_release_resources(fdc); 1641 mtx_destroy(&fdc->fdc_mtx); 1642 return (0); 1643} 1644 1645/* 1646 * Add a child device to the fdc controller. It will then be probed etc. 1647 */ 1648device_t 1649fdc_add_child(device_t dev, const char *name, int unit) 1650{ 1651 int flags; 1652 struct fdc_ivars *ivar; 1653 device_t child; 1654 1655 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO); 1656 if (ivar == NULL) 1657 return (NULL); 1658 child = device_add_child(dev, name, unit); 1659 if (child == NULL) { 1660 free(ivar, M_DEVBUF); 1661 return (NULL); 1662 } 1663 device_set_ivars(child, ivar); 1664 ivar->fdunit = unit; 1665 ivar->fdtype = FDT_NONE; 1666 if (resource_int_value(name, unit, "flags", &flags) == 0) 1667 device_set_flags(child, flags); 1668 if (resource_disabled(name, unit)) 1669 device_disable(child); 1670 return (child); 1671} 1672 1673int 1674fdc_attach(device_t dev) 1675{ 1676 struct fdc_data *fdc; 1677 int error; 1678 1679 fdc = device_get_softc(dev); 1680 fdc->fdc_dev = dev; 1681 error = fdc_initial_reset(dev, fdc); 1682 if (error) { 1683 device_printf(dev, "does not respond\n"); 1684 return (error); 1685 } 1686 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 1687 INTR_TYPE_BIO | INTR_ENTROPY | INTR_FAST | INTR_MPSAFE, 1688 fdc_intr, fdc, &fdc->fdc_intr); 1689 if (error) { 1690 device_printf(dev, "cannot setup interrupt\n"); 1691 return (error); 1692 } 1693 fdc->fdcu = device_get_unit(dev); 1694 fdc->flags |= FDC_NEEDS_RESET; 1695 1696 mtx_init(&fdc->fdc_mtx, "fdc lock", NULL, MTX_DEF); 1697 1698 /* reset controller, turn motor off, clear fdout mirror reg */ 1699 fdout_wr(fdc, fdc->fdout = 0); 1700 bioq_init(&fdc->head); 1701 1702 kthread_create(fdc_thread, fdc, &fdc->fdc_thread, 0, 0, 1703 "fdc%d", device_get_unit(dev)); 1704 1705 settle = hz / 8; 1706 1707 return (0); 1708} 1709 1710int 1711fdc_hints_probe(device_t dev) 1712{ 1713 const char *name, *dname; 1714 int i, error, dunit; 1715 1716 /* 1717 * Probe and attach any children. We should probably detect 1718 * devices from the BIOS unless overridden. 1719 */ 1720 name = device_get_nameunit(dev); 1721 i = 0; 1722 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) { 1723 resource_int_value(dname, dunit, "drive", &dunit); 1724 fdc_add_child(dev, dname, dunit); 1725 } 1726 1727 if ((error = bus_generic_attach(dev)) != 0) 1728 return (error); 1729 return (0); 1730} 1731 1732int 1733fdc_print_child(device_t me, device_t child) 1734{ 1735 int retval = 0, flags; 1736 1737 retval += bus_print_child_header(me, child); 1738 retval += printf(" on %s drive %d", device_get_nameunit(me), 1739 fdc_get_fdunit(child)); 1740 if ((flags = device_get_flags(me)) != 0) 1741 retval += printf(" flags %#x", flags); 1742 retval += printf("\n"); 1743 1744 return (retval); 1745} 1746 1747/* 1748 * Configuration/initialization, per drive. 1749 */ 1750static int 1751fd_probe(device_t dev) 1752{ 1753 int i, unit; 1754 u_int st0, st3; 1755 struct fd_data *fd; 1756 struct fdc_data *fdc; 1757 int fdsu; 1758 int flags, type; 1759 1760 fdsu = fdc_get_fdunit(dev); 1761 fd = device_get_softc(dev); 1762 fdc = device_get_softc(device_get_parent(dev)); 1763 flags = device_get_flags(dev); 1764 1765 fd->dev = dev; 1766 fd->fdc = fdc; 1767 fd->fdsu = fdsu; 1768 unit = device_get_unit(dev); 1769 1770 /* Auto-probe if fdinfo is present, but always allow override. */ 1771 type = flags & FD_TYPEMASK; 1772 if (type == FDT_NONE && (type = fdc_get_fdtype(dev)) != FDT_NONE) { 1773 fd->type = type; 1774 goto done; 1775 } else { 1776 /* make sure fdautoselect() will be called */ 1777 fd->flags = FD_EMPTY; 1778 fd->type = type; 1779 } 1780 1781/* 1782 * XXX I think using __i386__ is wrong here since we actually want to probe 1783 * for the machine type, not the CPU type (so non-PC arch's like the PC98 will 1784 * fail the probe). However, for whatever reason, testing for _MACHINE_ARCH 1785 * == i386 breaks the test on FreeBSD/Alpha. 1786 */ 1787#if defined(__i386__) || defined(__amd64__) 1788 if (fd->type == FDT_NONE && (unit == 0 || unit == 1)) { 1789 /* Look up what the BIOS thinks we have. */ 1790 if (unit == 0) { 1791 if ((fdc->flags & FDC_ISPCMCIA)) 1792 /* 1793 * Somewhat special. No need to force the 1794 * user to set device flags, since the Y-E 1795 * Data PCMCIA floppy is always a 1.44 MB 1796 * device. 1797 */ 1798 fd->type = FDT_144M; 1799 else 1800 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4; 1801 } else { 1802 fd->type = rtcin(RTC_FDISKETTE) & 0x0f; 1803 } 1804 if (fd->type == FDT_288M_1) 1805 fd->type = FDT_288M; 1806 } 1807#endif /* __i386__ || __amd64__ */ 1808 /* is there a unit? */ 1809 if (fd->type == FDT_NONE) 1810 return (ENXIO); 1811 1812/* 1813 mtx_lock(&fdc->fdc_mtx); 1814*/ 1815 /* select it */ 1816 fd_select(fd); 1817 fd_motor(fd, 1); 1818 fdc->fd = fd; 1819 fdc_reset(fdc); /* XXX reset, then unreset, etc. */ 1820 DELAY(1000000); /* 1 sec */ 1821 1822 if ((flags & FD_NO_PROBE) == 0) { 1823 /* If we're at track 0 first seek inwards. */ 1824 if ((fdc_sense_drive(fdc, &st3) == 0) && 1825 (st3 & NE7_ST3_T0)) { 1826 /* Seek some steps... */ 1827 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 1828 /* ...wait a moment... */ 1829 DELAY(300000); 1830 /* make ctrlr happy: */ 1831 fdc_sense_int(fdc, 0, 0); 1832 } 1833 } 1834 1835 for (i = 0; i < 2; i++) { 1836 /* 1837 * we must recalibrate twice, just in case the 1838 * heads have been beyond cylinder 76, since 1839 * most FDCs still barf when attempting to 1840 * recalibrate more than 77 steps 1841 */ 1842 /* go back to 0: */ 1843 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 1844 /* a second being enough for full stroke seek*/ 1845 DELAY(i == 0 ? 1000000 : 300000); 1846 1847 /* anything responding? */ 1848 if (fdc_sense_int(fdc, &st0, 0) == 0 && 1849 (st0 & NE7_ST0_EC) == 0) 1850 break; /* already probed succesfully */ 1851 } 1852 } 1853 } 1854 1855 fd_motor(fd, 0); 1856 fdc->fd = NULL; 1857/* 1858 mtx_unlock(&fdc->fdc_mtx); 1859*/ 1860 1861 if ((flags & FD_NO_PROBE) == 0 && 1862 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */ 1863 return (ENXIO); 1864 1865done: 1866 1867 switch (fd->type) { 1868 case FDT_12M: 1869 device_set_desc(dev, "1200-KB 5.25\" drive"); 1870 break; 1871 case FDT_144M: 1872 device_set_desc(dev, "1440-KB 3.5\" drive"); 1873 break; 1874 case FDT_288M: 1875 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 1876 break; 1877 case FDT_360K: 1878 device_set_desc(dev, "360-KB 5.25\" drive"); 1879 break; 1880 case FDT_720K: 1881 device_set_desc(dev, "720-KB 3.5\" drive"); 1882 break; 1883 default: 1884 return (ENXIO); 1885 } 1886 fd->track = FD_NO_TRACK; 1887 fd->fdc = fdc; 1888 fd->fdsu = fdsu; 1889 fd->options = 0; 1890 callout_init(&fd->toffhandle, 1); 1891 callout_init(&fd->tohandle, 1); 1892 1893 /* initialize densities for subdevices */ 1894 fdsettype(fd, fd_native_types[fd->type]); 1895 return (0); 1896} 1897 1898/* 1899 * We have to do this in a geom event because GEOM is not running 1900 * when fd_attach() is. 1901 * XXX: move fd_attach after geom like ata/scsi disks 1902 */ 1903static void 1904fd_attach2(void *arg, int flag) 1905{ 1906 struct fd_data *fd; 1907 1908 fd = arg; 1909 1910 fd->fd_geom = g_new_geomf(&g_fd_class, 1911 "fd%d", device_get_unit(fd->fdc->fdc_dev)); 1912 fd->fd_provider = g_new_providerf(fd->fd_geom, fd->fd_geom->name); 1913 fd->fd_geom->softc = fd; 1914 g_error_provider(fd->fd_provider, 0); 1915} 1916 1917static int 1918fd_attach(device_t dev) 1919{ 1920 struct fd_data *fd; 1921 1922 fd = device_get_softc(dev); 1923 g_post_event(fd_attach2, fd, M_WAITOK, NULL); 1924 fd->flags |= FD_EMPTY; 1925 bioq_init(&fd->fd_bq); 1926 return (0); 1927 1928 return (0); 1929} 1930 1931static int 1932fd_detach(device_t dev) 1933{ 1934 struct fd_data *fd; 1935 1936 fd = device_get_softc(dev); 1937 callout_drain(&fd->toffhandle); 1938 1939 return (0); 1940} 1941 1942static device_method_t fd_methods[] = { 1943 /* Device interface */ 1944 DEVMETHOD(device_probe, fd_probe), 1945 DEVMETHOD(device_attach, fd_attach), 1946 DEVMETHOD(device_detach, fd_detach), 1947 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1948 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1949 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1950 { 0, 0 } 1951}; 1952 1953static driver_t fd_driver = { 1954 "fd", 1955 fd_methods, 1956 sizeof(struct fd_data) 1957}; 1958 1959DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1960