fdc.c revision 297568
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 297568 2016-04-05 00:08:42Z jhb $"); 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/priv.h> 73#include <sys/proc.h> 74#include <sys/rman.h> 75#include <sys/sysctl.h> 76#include <sys/systm.h> 77 78#include <geom/geom.h> 79 80#include <machine/bus.h> 81#include <machine/clock.h> 82#include <machine/stdarg.h> 83 84#include <isa/isavar.h> 85#ifdef PC98 86#include <pc98/pc98/pc98_machdep.h> 87#else 88#include <isa/isareg.h> 89#include <isa/rtc.h> 90#endif 91#include <dev/fdc/fdcvar.h> 92 93#include <dev/ic/nec765.h> 94 95/* 96 * Runtime configuration hints/flags 97 */ 98 99/* configuration flags for fd */ 100#define FD_TYPEMASK 0x0f /* drive type, matches enum 101 * fd_drivetype; on i386 machines, if 102 * given as 0, use RTC type for fd0 103 * and fd1 */ 104#define FD_NO_CHLINE 0x10 /* drive does not support changeline 105 * aka. unit attention */ 106#define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just 107 * assume it is there */ 108 109/* 110 * Things that could conceiveably considered parameters or tweakables 111 */ 112 113/* 114 * Maximal number of bytes in a cylinder. 115 * This is used for ISADMA bouncebuffer allocation and sets the max 116 * xfersize we support. 117 * 118 * 2.88M format has 2 x 36 x 512, allow for hacked up density. 119 */ 120#define MAX_BYTES_PER_CYL (2 * 40 * 512) 121 122/* 123 * Timeout value for the PIO loops to wait until the FDC main status 124 * register matches our expectations (request for master, direction 125 * bit). This is supposed to be a number of microseconds, although 126 * timing might actually not be very accurate. 127 * 128 * Timeouts of 100 msec are believed to be required for some broken 129 * (old) hardware. 130 */ 131#define FDSTS_TIMEOUT 100000 132 133/* 134 * After this many errors, stop whining. Close will reset this count. 135 */ 136#define FDC_ERRMAX 100 137 138/* 139 * AutoDensity search lists for each drive type. 140 */ 141 142static struct fd_type fd_searchlist_360k[] = { 143#ifndef PC98 144 { FDF_5_360 }, 145#endif 146 { 0 } 147}; 148 149static struct fd_type fd_searchlist_12m[] = { 150#ifdef PC98 151 { FDF_5_1200 | FL_AUTO }, 152 { FDF_5_720 | FL_AUTO }, 153 { FDF_5_360 | FL_AUTO }, 154 { FDF_5_640 | FL_AUTO }, 155 { FDF_5_1230 | FL_AUTO }, 156#else 157 { FDF_5_1200 | FL_AUTO }, 158 { FDF_5_400 | FL_AUTO }, 159 { FDF_5_360 | FL_2STEP | FL_AUTO}, 160#endif 161 { 0 } 162}; 163 164static struct fd_type fd_searchlist_720k[] = { 165#ifndef PC98 166 { FDF_3_720 }, 167#endif 168 { 0 } 169}; 170 171static struct fd_type fd_searchlist_144m[] = { 172#ifdef PC98 173 { FDF_3_1440 | FL_AUTO}, 174 { FDF_3_1200 | FL_AUTO}, 175 { FDF_3_720 | FL_AUTO}, 176 { FDF_3_360 | FL_AUTO}, 177 { FDF_3_640 | FL_AUTO}, 178 { FDF_3_1230 | FL_AUTO}, 179#else 180 { FDF_3_1440 | FL_AUTO}, 181 { FDF_3_720 | FL_AUTO}, 182#endif 183 { 0 } 184}; 185 186static struct fd_type fd_searchlist_288m[] = { 187#ifndef PC98 188 { FDF_3_1440 | FL_AUTO }, 189#if 0 190 { FDF_3_2880 | FL_AUTO }, /* XXX: probably doesn't work */ 191#endif 192 { FDF_3_720 | FL_AUTO}, 193#endif 194 { 0 } 195}; 196 197/* 198 * Order must match enum fd_drivetype in <sys/fdcio.h>. 199 */ 200static struct fd_type *fd_native_types[] = { 201 NULL, /* FDT_NONE */ 202 fd_searchlist_360k, /* FDT_360K */ 203 fd_searchlist_12m, /* FDT_12M */ 204 fd_searchlist_720k, /* FDT_720K */ 205 fd_searchlist_144m, /* FDT_144M */ 206 fd_searchlist_288m, /* FDT_288M_1 (mapped to FDT_288M) */ 207 fd_searchlist_288m, /* FDT_288M */ 208}; 209 210/* 211 * Internals start here 212 */ 213 214#ifdef PC98 215/* registers */ 216#define FDSTS 0 /* NEC 765 Main Status Register (R) */ 217#define FDDATA 1 /* NEC 765 Data Register (R/W) */ 218#define FDCTL 2 /* FD Control Register */ 219#define FDC_RST 0x80 /* FDC RESET */ 220#define FDC_RDY 0x40 /* force READY */ 221#define FDC_DD 0x20 /* FDD Mode Exchange 0:1M 1:640K */ 222#define FDC_DMAE 0x10 /* enable floppy DMA */ 223#define FDC_MTON 0x08 /* MOTOR ON (when EMTON=1)*/ 224#define FDC_TMSK 0x04 /* TIMER MASK */ 225#define FDC_TTRG 0x01 /* TIMER TRIGER */ 226 227#define FDP 3 228#define FDP_EMTON 0x04 /* enable MTON */ 229#define FDP_FDDEXC 0x02 /* FDD Mode Exchange 1:1M 0:640K */ 230#define FDP_PORTEXC 0x01 /* PORT Exchane 1:1M 0:640K */ 231 232#define FDEM 4 233#else 234/* registers */ 235#define FDOUT 2 /* Digital Output Register (W) */ 236#define FDO_FDSEL 0x03 /* floppy device select */ 237#define FDO_FRST 0x04 /* floppy controller reset */ 238#define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */ 239#define FDO_MOEN0 0x10 /* motor enable drive 0 */ 240#define FDO_MOEN1 0x20 /* motor enable drive 1 */ 241#define FDO_MOEN2 0x40 /* motor enable drive 2 */ 242#define FDO_MOEN3 0x80 /* motor enable drive 3 */ 243 244#define FDSTS 4 /* NEC 765 Main Status Register (R) */ 245#define FDDSR 4 /* Data Rate Select Register (W) */ 246#define FDDATA 5 /* NEC 765 Data Register (R/W) */ 247#define FDCTL 7 /* Control Register (W) */ 248#endif /* PC98 */ 249 250/* 251 * The YE-DATA PC Card floppies use PIO to read in the data rather 252 * than DMA due to the wild variability of DMA for the PC Card 253 * devices. DMA was deleted from the PC Card specification in version 254 * 7.2 of the standard, but that post-dates the YE-DATA devices by many 255 * years. 256 * 257 * In addition, if we cannot setup the DMA resources for the ISA 258 * attachment, we'll use this same offset for data transfer. However, 259 * that almost certainly won't work. 260 * 261 * For this mode, offset 0 and 1 must be used to setup the transfer 262 * for this floppy. This is OK for PC Card YE Data devices, but for 263 * ISA this is likely wrong. These registers are only available on 264 * those systems that map them to the floppy drive. Newer systems do 265 * not do this, and we should likely prohibit access to them (or 266 * disallow NODMA to be set). 267 */ 268#define FDBCDR 0 /* And 1 */ 269#define FD_YE_DATAPORT 6 /* Drive Data port */ 270 271#ifndef PC98 272#define FDI_DCHG 0x80 /* diskette has been changed */ 273 /* requires drive and motor being selected */ 274 /* is cleared by any step pulse to drive */ 275#endif 276 277/* 278 * We have three private BIO commands. 279 */ 280#define BIO_PROBE BIO_CMD0 281#define BIO_RDID BIO_CMD1 282#define BIO_FMT BIO_CMD2 283 284/* 285 * Per drive structure (softc). 286 */ 287struct fd_data { 288 u_char *fd_ioptr; /* IO pointer */ 289 u_int fd_iosize; /* Size of IO chunks */ 290 u_int fd_iocount; /* Outstanding requests */ 291 struct fdc_data *fdc; /* pointer to controller structure */ 292 int fdsu; /* this units number on this controller */ 293 enum fd_drivetype type; /* drive type */ 294 struct fd_type *ft; /* pointer to current type descriptor */ 295 struct fd_type fts; /* type descriptors */ 296 int sectorsize; 297 int flags; 298#define FD_WP (1<<0) /* Write protected */ 299#define FD_MOTOR (1<<1) /* motor should be on */ 300#define FD_MOTORWAIT (1<<2) /* motor should be on */ 301#define FD_EMPTY (1<<3) /* no media */ 302#define FD_NEWDISK (1<<4) /* media changed */ 303#define FD_ISADMA (1<<5) /* isa dma started */ 304 int track; /* where we think the head is */ 305#define FD_NO_TRACK -2 306 int options; /* FDOPT_* */ 307 struct callout toffhandle; 308 struct g_geom *fd_geom; 309 struct g_provider *fd_provider; 310 device_t dev; 311 struct bio_queue_head fd_bq; 312#ifdef PC98 313 int pc98_trans; 314#endif 315}; 316 317#define FD_NOT_VALID -2 318 319static driver_intr_t fdc_intr; 320static driver_filter_t fdc_intr_fast; 321static void fdc_reset(struct fdc_data *); 322static int fd_probe_disk(struct fd_data *, int *); 323 324static SYSCTL_NODE(_debug, OID_AUTO, fdc, CTLFLAG_RW, 0, "fdc driver"); 325 326static int fifo_threshold = 8; 327SYSCTL_INT(_debug_fdc, OID_AUTO, fifo, CTLFLAG_RW, &fifo_threshold, 0, 328 "FIFO threshold setting"); 329 330static int debugflags = 0; 331SYSCTL_INT(_debug_fdc, OID_AUTO, debugflags, CTLFLAG_RW, &debugflags, 0, 332 "Debug flags"); 333 334static int retries = 10; 335SYSCTL_INT(_debug_fdc, OID_AUTO, retries, CTLFLAG_RW, &retries, 0, 336 "Number of retries to attempt"); 337 338#ifdef PC98 339static int spec1 = NE7_SPEC_1(4, 240); 340#else 341static int spec1 = NE7_SPEC_1(6, 240); 342#endif 343SYSCTL_INT(_debug_fdc, OID_AUTO, spec1, CTLFLAG_RW, &spec1, 0, 344 "Specification byte one (step-rate + head unload)"); 345 346#ifdef PC98 347static int spec2 = NE7_SPEC_2(2, 0); 348#else 349static int spec2 = NE7_SPEC_2(16, 0); 350#endif 351SYSCTL_INT(_debug_fdc, OID_AUTO, spec2, CTLFLAG_RW, &spec2, 0, 352 "Specification byte two (head load time + no-dma)"); 353 354static int settle; 355SYSCTL_INT(_debug_fdc, OID_AUTO, settle, CTLFLAG_RW, &settle, 0, 356 "Head settling time in sec/hz"); 357 358static void 359fdprinttype(struct fd_type *ft) 360{ 361 362 printf("(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,0x%x)", 363 ft->sectrac, ft->secsize, ft->datalen, ft->gap, ft->tracks, 364 ft->size, ft->trans, ft->heads, ft->f_gap, ft->f_inter, 365 ft->offset_side2, ft->flags); 366} 367 368static void 369fdsettype(struct fd_data *fd, struct fd_type *ft) 370{ 371 fd->ft = ft; 372 ft->size = ft->sectrac * ft->heads * ft->tracks; 373 fd->sectorsize = 128 << fd->ft->secsize; 374} 375 376/* 377 * Bus space handling (access to low-level IO). 378 */ 379static inline void 380fdregwr(struct fdc_data *fdc, int reg, uint8_t v) 381{ 382 383 bus_space_write_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg], v); 384} 385 386static inline uint8_t 387fdregrd(struct fdc_data *fdc, int reg) 388{ 389 390 return bus_space_read_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg]); 391} 392 393static void 394fdctl_wr(struct fdc_data *fdc, u_int8_t v) 395{ 396 397 fdregwr(fdc, FDCTL, v); 398} 399 400#ifndef PC98 401static void 402fdout_wr(struct fdc_data *fdc, u_int8_t v) 403{ 404 405 fdregwr(fdc, FDOUT, v); 406} 407#endif 408 409static u_int8_t 410fdsts_rd(struct fdc_data *fdc) 411{ 412 413 return fdregrd(fdc, FDSTS); 414} 415 416#ifndef PC98 417static void 418fddsr_wr(struct fdc_data *fdc, u_int8_t v) 419{ 420 421 fdregwr(fdc, FDDSR, v); 422} 423#endif 424 425static void 426fddata_wr(struct fdc_data *fdc, u_int8_t v) 427{ 428 429 fdregwr(fdc, FDDATA, v); 430} 431 432static u_int8_t 433fddata_rd(struct fdc_data *fdc) 434{ 435 436 return fdregrd(fdc, FDDATA); 437} 438 439#ifndef PC98 440static u_int8_t 441fdin_rd(struct fdc_data *fdc) 442{ 443 444 return fdregrd(fdc, FDCTL); 445} 446#endif 447 448/* 449 * Magic pseudo-DMA initialization for YE FDC. Sets count and 450 * direction. 451 */ 452static void 453fdbcdr_wr(struct fdc_data *fdc, int iswrite, uint16_t count) 454{ 455 fdregwr(fdc, FDBCDR, (count - 1) & 0xff); 456 fdregwr(fdc, FDBCDR + 1, 457 (iswrite ? 0x80 : 0) | (((count - 1) >> 8) & 0x7f)); 458} 459 460static int 461fdc_err(struct fdc_data *fdc, const char *s) 462{ 463 fdc->fdc_errs++; 464 if (s) { 465 if (fdc->fdc_errs < FDC_ERRMAX) 466 device_printf(fdc->fdc_dev, "%s", s); 467 else if (fdc->fdc_errs == FDC_ERRMAX) 468 device_printf(fdc->fdc_dev, "too many errors, not " 469 "logging any more\n"); 470 } 471 472 return (1); 473} 474 475/* 476 * FDC IO functions, take care of the main status register, timeout 477 * in case the desired status bits are never set. 478 * 479 * These PIO loops initially start out with short delays between 480 * each iteration in the expectation that the required condition 481 * is usually met quickly, so it can be handled immediately. 482 */ 483static int 484fdc_in(struct fdc_data *fdc, int *ptr) 485{ 486 int i, j, step; 487 488 step = 1; 489 for (j = 0; j < FDSTS_TIMEOUT; j += step) { 490 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM); 491 if (i == (NE7_DIO|NE7_RQM)) { 492 i = fddata_rd(fdc); 493 if (ptr) 494 *ptr = i; 495 return (0); 496 } 497 if (i == NE7_RQM) 498 return (fdc_err(fdc, "ready for output in input\n")); 499 step += step; 500 DELAY(step); 501 } 502 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); 503} 504 505static int 506fdc_out(struct fdc_data *fdc, int x) 507{ 508 int i, j, step; 509 510 step = 1; 511 for (j = 0; j < FDSTS_TIMEOUT; j += step) { 512 i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM); 513 if (i == NE7_RQM) { 514 fddata_wr(fdc, x); 515 return (0); 516 } 517 if (i == (NE7_DIO|NE7_RQM)) 518 return (fdc_err(fdc, "ready for input in output\n")); 519 step += step; 520 DELAY(step); 521 } 522 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); 523} 524 525/* 526 * fdc_cmd: Send a command to the chip. 527 * Takes a varargs with this structure: 528 * # of output bytes 529 * output bytes as int [...] 530 * # of input bytes 531 * input bytes as int* [...] 532 */ 533static int 534fdc_cmd(struct fdc_data *fdc, int n_out, ...) 535{ 536 u_char cmd = 0; 537 int n_in; 538 int n, i; 539 va_list ap; 540 541 va_start(ap, n_out); 542 for (n = 0; n < n_out; n++) { 543 i = va_arg(ap, int); 544 if (n == 0) 545 cmd = i; 546 if (fdc_out(fdc, i) < 0) { 547 char msg[50]; 548 snprintf(msg, sizeof(msg), 549 "cmd %x failed at out byte %d of %d\n", 550 cmd, n + 1, n_out); 551 fdc->flags |= FDC_NEEDS_RESET; 552 va_end(ap); 553 return fdc_err(fdc, msg); 554 } 555 } 556 n_in = va_arg(ap, int); 557 for (n = 0; n < n_in; n++) { 558 int *ptr = va_arg(ap, int *); 559 if (fdc_in(fdc, ptr) < 0) { 560 char msg[50]; 561 snprintf(msg, sizeof(msg), 562 "cmd %02x failed at in byte %d of %d\n", 563 cmd, n + 1, n_in); 564 fdc->flags |= FDC_NEEDS_RESET; 565 va_end(ap); 566 return fdc_err(fdc, msg); 567 } 568 } 569 va_end(ap); 570 return (0); 571} 572 573#ifdef PC98 574static void fd_motor(struct fd_data *fd, int turnon); 575 576static int pc98_trans = 0; /* 0 : HD , 1 : DD , 2 : 1.44 */ 577static int pc98_trans_prev = -1; 578 579static void 580set_density(struct fdc_data *fdc) 581{ 582 /* always motor on */ 583 fdregwr(fdc, FDP, (pc98_trans != 1 ? FDP_FDDEXC : 0) | FDP_PORTEXC); 584 DELAY(100); 585 fdctl_wr(fdc, FDC_RST | FDC_DMAE); 586 /* in the case of note W, always inhibit 100ms timer */ 587} 588 589static int 590pc98_fd_check_ready(struct fd_data *fd) 591{ 592 struct fdc_data *fdc = fd->fdc; 593 int retry = 0, status; 594 int fdu = device_get_unit(fd->dev); 595 596 while (retry++ < 30000) { 597 fd_motor(fd, 1); 598 fdc_out(fdc, NE7CMD_SENSED); /* Sense Drive Status */ 599 DELAY(100); 600 fdc_out(fdc, fdu); /* Drive number */ 601 DELAY(100); 602 if ((fdc_in(fdc, &status) == 0) && (status & NE7_ST3_RD)) { 603 fdctl_wr(fdc, FDC_DMAE | FDC_MTON); 604 DELAY(10); 605 return (0); 606 } 607 } 608 return (-1); 609} 610 611static void 612pc98_fd_check_type(struct fd_data *fd, int unit) 613{ 614 struct fdc_data *fdc; 615 616 if (fd->type != FDT_NONE || unit < 0 || unit > 3) 617 return; 618 619 fdc = fd->fdc; 620 621 /* Look up what the BIOS thinks we have. */ 622 if (!((PC98_SYSTEM_PARAMETER(0x55c) >> unit) & 0x01)) { 623 fd->type = FDT_NONE; 624 return; 625 } 626 if ((PC98_SYSTEM_PARAMETER(0x5ae) >> unit) & 0x01) { 627 /* Check 3mode I/F */ 628 fd->pc98_trans = 0; 629 fdregwr(fdc, FDEM, (unit << 5) | 0x10); 630 if (!(fdregrd(fdc, FDEM) & 0x01)) { 631 fd->type = FDT_144M; 632 return; 633 } 634 device_printf(fd->dev, 635 "Warning: can't control 3mode I/F, fallback to 2mode.\n"); 636 } 637 638 fd->type = FDT_12M; 639} 640#endif /* PC98 */ 641 642static void 643fdc_reset(struct fdc_data *fdc) 644{ 645 int i, r[10]; 646 647#ifdef PC98 648 set_density(fdc); 649 if (pc98_machine_type & M_EPSON_PC98) 650 fdctl_wr(fdc, FDC_RST | FDC_RDY | FDC_DD | FDC_MTON); 651 else 652 fdctl_wr(fdc, FDC_RST | FDC_RDY | FDC_DMAE | FDC_MTON); 653 DELAY(200); 654 fdctl_wr(fdc, FDC_DMAE | FDC_MTON); 655 DELAY(10); 656#else 657 if (fdc->fdct == FDC_ENHANCED) { 658 /* Try a software reset, default precomp, and 500 kb/s */ 659 fddsr_wr(fdc, I8207X_DSR_SR); 660 } else { 661 /* Try a hardware reset, keep motor on */ 662 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 663 DELAY(100); 664 /* enable FDC, but defer interrupts a moment */ 665 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 666 } 667 DELAY(100); 668 fdout_wr(fdc, fdc->fdout); 669#endif 670 671 /* XXX after a reset, silently believe the FDC will accept commands */ 672 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, spec1, spec2, 0)) 673 device_printf(fdc->fdc_dev, " SPECIFY failed in reset\n"); 674 675 if (fdc->fdct == FDC_ENHANCED) { 676 if (fdc_cmd(fdc, 4, 677 I8207X_CONFIG, 678 0, 679 /* 0x40 | */ /* Enable Implied Seek - 680 * breaks 2step! */ 681 0x10 | /* Polling disabled */ 682 (fifo_threshold - 1), /* Fifo threshold */ 683 0x00, /* Precomp track */ 684 0)) 685 device_printf(fdc->fdc_dev, 686 " CONFIGURE failed in reset\n"); 687 if (debugflags & 1) { 688 if (fdc_cmd(fdc, 1, 689 I8207X_DUMPREG, 690 10, &r[0], &r[1], &r[2], &r[3], &r[4], 691 &r[5], &r[6], &r[7], &r[8], &r[9])) 692 device_printf(fdc->fdc_dev, 693 " DUMPREG failed in reset\n"); 694 for (i = 0; i < 10; i++) 695 printf(" %02x", r[i]); 696 printf("\n"); 697 } 698 } 699} 700 701static int 702fdc_sense_drive(struct fdc_data *fdc, int *st3p) 703{ 704 int st3; 705 706 if (fdc_cmd(fdc, 2, NE7CMD_SENSED, fdc->fd->fdsu, 1, &st3)) 707 return (fdc_err(fdc, "Sense Drive Status failed\n")); 708 if (st3p) 709 *st3p = st3; 710 return (0); 711} 712 713static int 714fdc_sense_int(struct fdc_data *fdc, int *st0p, int *cylp) 715{ 716 int cyl, st0, ret; 717 718 ret = fdc_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 719 if (ret) { 720 (void)fdc_err(fdc, "sense intr err reading stat reg 0\n"); 721 return (ret); 722 } 723 724 if (st0p) 725 *st0p = st0; 726 727 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 728 /* 729 * There doesn't seem to have been an interrupt. 730 */ 731 return (FD_NOT_VALID); 732 } 733 734 if (fdc_in(fdc, &cyl) < 0) 735 return fdc_err(fdc, "can't get cyl num\n"); 736 737 if (cylp) 738 *cylp = cyl; 739 740 return (0); 741} 742 743static int 744fdc_read_status(struct fdc_data *fdc) 745{ 746 int i, ret, status; 747 748 for (i = ret = 0; i < 7; i++) { 749 ret = fdc_in(fdc, &status); 750 fdc->status[i] = status; 751 if (ret != 0) 752 break; 753 } 754 755 if (ret == 0) 756 fdc->flags |= FDC_STAT_VALID; 757 else 758 fdc->flags &= ~FDC_STAT_VALID; 759 760 return ret; 761} 762 763#ifndef PC98 764/* 765 * Select this drive 766 */ 767static void 768fd_select(struct fd_data *fd) 769{ 770 struct fdc_data *fdc; 771 772 /* XXX: lock controller */ 773 fdc = fd->fdc; 774 fdc->fdout &= ~FDO_FDSEL; 775 fdc->fdout |= FDO_FDMAEN | FDO_FRST | fd->fdsu; 776 fdout_wr(fdc, fdc->fdout); 777} 778 779static void 780fd_turnon(void *arg) 781{ 782 struct fd_data *fd; 783 struct bio *bp; 784 int once; 785 786 fd = arg; 787 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED); 788 fd->flags &= ~FD_MOTORWAIT; 789 fd->flags |= FD_MOTOR; 790 once = 0; 791 for (;;) { 792 bp = bioq_takefirst(&fd->fd_bq); 793 if (bp == NULL) 794 break; 795 bioq_disksort(&fd->fdc->head, bp); 796 once = 1; 797 } 798 if (once) 799 wakeup(&fd->fdc->head); 800} 801#endif 802 803static void 804fd_motor(struct fd_data *fd, int turnon) 805{ 806 struct fdc_data *fdc; 807 808 fdc = fd->fdc; 809/* 810 mtx_assert(&fdc->fdc_mtx, MA_OWNED); 811*/ 812#ifdef PC98 813 fdregwr(fdc, FDP, (pc98_trans != 1 ? FDP_FDDEXC : 0) | FDP_PORTEXC); 814 DELAY(10); 815 fdctl_wr(fdc, FDC_DMAE | FDC_MTON); 816#else 817 if (turnon) { 818 fd->flags |= FD_MOTORWAIT; 819 fdc->fdout |= (FDO_MOEN0 << fd->fdsu); 820 callout_reset(&fd->toffhandle, hz, fd_turnon, fd); 821 } else { 822 callout_stop(&fd->toffhandle); 823 fd->flags &= ~(FD_MOTOR|FD_MOTORWAIT); 824 fdc->fdout &= ~(FDO_MOEN0 << fd->fdsu); 825 } 826 fdout_wr(fdc, fdc->fdout); 827#endif 828} 829 830static void 831fd_turnoff(void *xfd) 832{ 833 struct fd_data *fd = xfd; 834 835 mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED); 836 fd_motor(fd, 0); 837} 838 839/* 840 * fdc_intr - wake up the worker thread. 841 */ 842 843static void 844fdc_intr(void *arg) 845{ 846 847 wakeup(arg); 848} 849 850static int 851fdc_intr_fast(void *arg) 852{ 853 854 wakeup(arg); 855 return(FILTER_HANDLED); 856} 857 858/* 859 * fdc_pio(): perform programmed IO read/write for YE PCMCIA floppy. 860 */ 861static void 862fdc_pio(struct fdc_data *fdc) 863{ 864 u_char *cptr; 865 struct bio *bp; 866 u_int count; 867 868 bp = fdc->bp; 869 cptr = fdc->fd->fd_ioptr; 870 count = fdc->fd->fd_iosize; 871 872 if (bp->bio_cmd == BIO_READ) { 873 fdbcdr_wr(fdc, 0, count); 874 bus_space_read_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT], 875 fdc->ioff[FD_YE_DATAPORT], cptr, count); 876 } else { 877 bus_space_write_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT], 878 fdc->ioff[FD_YE_DATAPORT], cptr, count); 879 fdbcdr_wr(fdc, 0, count); /* needed? */ 880 } 881} 882 883static int 884fdc_biodone(struct fdc_data *fdc, int error) 885{ 886 struct fd_data *fd; 887 struct bio *bp; 888 889 fd = fdc->fd; 890 bp = fdc->bp; 891 892 mtx_lock(&fdc->fdc_mtx); 893 if (--fd->fd_iocount == 0) 894 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd); 895 fdc->bp = NULL; 896 fdc->fd = NULL; 897 mtx_unlock(&fdc->fdc_mtx); 898 if (bp->bio_to != NULL) { 899 if ((debugflags & 2) && fd->fdc->retry > 0) 900 printf("retries: %d\n", fd->fdc->retry); 901 g_io_deliver(bp, error); 902 return (0); 903 } 904 bp->bio_error = error; 905 bp->bio_flags |= BIO_DONE; 906 wakeup(bp); 907 return (0); 908} 909 910static int retry_line; 911 912static int 913fdc_worker(struct fdc_data *fdc) 914{ 915 struct fd_data *fd; 916 struct bio *bp; 917 int i, nsect; 918 int st0, st3, cyl, mfm, steptrac, cylinder, descyl, sec; 919 int head; 920 int override_error; 921 static int need_recal; 922 struct fdc_readid *idp; 923 struct fd_formb *finfo; 924 925 override_error = 0; 926 927 /* Have we exhausted our retries ? */ 928 bp = fdc->bp; 929 fd = fdc->fd; 930 if (bp != NULL && 931 (fdc->retry >= retries || (fd->options & FDOPT_NORETRY))) { 932 if ((debugflags & 4)) 933 printf("Too many retries (EIO)\n"); 934 if (fdc->flags & FDC_NEEDS_RESET) { 935 mtx_lock(&fdc->fdc_mtx); 936 fd->flags |= FD_EMPTY; 937 mtx_unlock(&fdc->fdc_mtx); 938 } 939 return (fdc_biodone(fdc, EIO)); 940 } 941 942 /* Disable ISADMA if we bailed while it was active */ 943 if (fd != NULL && (fd->flags & FD_ISADMA)) { 944 isa_dmadone( 945 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE, 946 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan); 947 mtx_lock(&fdc->fdc_mtx); 948 fd->flags &= ~FD_ISADMA; 949 mtx_unlock(&fdc->fdc_mtx); 950 } 951 952 /* Unwedge the controller ? */ 953 if (fdc->flags & FDC_NEEDS_RESET) { 954 fdc->flags &= ~FDC_NEEDS_RESET; 955 fdc_reset(fdc); 956 tsleep(fdc, PRIBIO, "fdcrst", hz); 957 /* Discard results */ 958 for (i = 0; i < 4; i++) 959 fdc_sense_int(fdc, &st0, &cyl); 960 /* All drives must recal */ 961 need_recal = 0xf; 962 } 963 964 /* Pick up a request, if need be wait for it */ 965 if (fdc->bp == NULL) { 966 mtx_lock(&fdc->fdc_mtx); 967 do { 968 fdc->bp = bioq_takefirst(&fdc->head); 969 if (fdc->bp == NULL) 970 msleep(&fdc->head, &fdc->fdc_mtx, 971 PRIBIO, "-", 0); 972 } while (fdc->bp == NULL && 973 (fdc->flags & FDC_KTHREAD_EXIT) == 0); 974 mtx_unlock(&fdc->fdc_mtx); 975 976 if (fdc->bp == NULL) 977 /* 978 * Nothing to do, worker thread has been 979 * requested to stop. 980 */ 981 return (0); 982 983 bp = fdc->bp; 984 fd = fdc->fd = bp->bio_driver1; 985 fdc->retry = 0; 986 fd->fd_ioptr = bp->bio_data; 987 if (bp->bio_cmd == BIO_FMT) { 988 i = offsetof(struct fd_formb, fd_formb_cylno(0)); 989 fd->fd_ioptr += i; 990 fd->fd_iosize = bp->bio_length - i; 991 } 992 } 993 994 /* Select drive, setup params */ 995#ifdef PC98 996 pc98_trans = fd->ft->trans; 997 if (pc98_trans_prev != pc98_trans) { 998 int i; 999 1000 set_density(fdc); 1001 for (i = 0; i < 10; i++) { 1002 outb(0x5f, 0); 1003 outb(0x5f, 0); 1004 } 1005 pc98_trans_prev = pc98_trans; 1006 } 1007 if (pc98_trans != fd->pc98_trans) { 1008 if (fd->type == FDT_144M) { 1009 fdregwr(fdc, FDEM, 1010 (device_get_unit(fd->dev) << 5) | 0x10 | 1011 (pc98_trans >> 1)); 1012 outb(0x5f, 0); 1013 outb(0x5f, 0); 1014 } 1015 fd->pc98_trans = pc98_trans; 1016 } 1017#else 1018 fd_select(fd); 1019 if (fdc->fdct == FDC_ENHANCED) 1020 fddsr_wr(fdc, fd->ft->trans); 1021 else 1022 fdctl_wr(fdc, fd->ft->trans); 1023#endif 1024 1025 if (bp->bio_cmd == BIO_PROBE) { 1026 if ((!(device_get_flags(fd->dev) & FD_NO_CHLINE) && 1027#ifndef PC98 1028 !(fdin_rd(fdc) & FDI_DCHG) && 1029#endif 1030 !(fd->flags & FD_EMPTY)) || 1031 fd_probe_disk(fd, &need_recal) == 0) 1032 return (fdc_biodone(fdc, 0)); 1033 return (1); 1034 } 1035 1036 /* 1037 * If we are dead just flush the requests 1038 */ 1039 if (fd->flags & FD_EMPTY) 1040 return (fdc_biodone(fdc, ENXIO)); 1041 1042#ifndef PC98 1043 /* Check if we lost our media */ 1044 if (fdin_rd(fdc) & FDI_DCHG) { 1045 if (debugflags & 0x40) 1046 printf("Lost disk\n"); 1047 mtx_lock(&fdc->fdc_mtx); 1048 fd->flags |= FD_EMPTY; 1049 fd->flags |= FD_NEWDISK; 1050 mtx_unlock(&fdc->fdc_mtx); 1051 g_topology_lock(); 1052 g_orphan_provider(fd->fd_provider, ENXIO); 1053 fd->fd_provider->flags |= G_PF_WITHER; 1054 fd->fd_provider = 1055 g_new_providerf(fd->fd_geom, "%s", fd->fd_geom->name); 1056 g_error_provider(fd->fd_provider, 0); 1057 g_topology_unlock(); 1058 return (fdc_biodone(fdc, ENXIO)); 1059 } 1060#endif 1061 1062 /* Check if the floppy is write-protected */ 1063 if (bp->bio_cmd == BIO_FMT || bp->bio_cmd == BIO_WRITE) { 1064 retry_line = __LINE__; 1065 if(fdc_sense_drive(fdc, &st3) != 0) 1066 return (1); 1067 if(st3 & NE7_ST3_WP) 1068 return (fdc_biodone(fdc, EROFS)); 1069 } 1070 1071 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0; 1072 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1; 1073 i = fd->ft->sectrac * fd->ft->heads; 1074 cylinder = bp->bio_pblkno / i; 1075 descyl = cylinder * steptrac; 1076 sec = bp->bio_pblkno % i; 1077 nsect = i - sec; 1078 head = sec / fd->ft->sectrac; 1079 sec = sec % fd->ft->sectrac + 1; 1080 1081 /* If everything is going swimmingly, use multisector xfer */ 1082 if (fdc->retry == 0 && 1083 (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE)) { 1084 fd->fd_iosize = imin(nsect * fd->sectorsize, bp->bio_resid); 1085 nsect = fd->fd_iosize / fd->sectorsize; 1086 } else if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) { 1087 fd->fd_iosize = fd->sectorsize; 1088 nsect = 1; 1089 } 1090 1091 /* Do RECAL if we need to or are going to track zero anyway */ 1092 if ((need_recal & (1 << fd->fdsu)) || 1093 (cylinder == 0 && fd->track != 0) || 1094 fdc->retry > 2) { 1095#ifdef PC98 1096 pc98_fd_check_ready(fd); 1097#endif 1098 retry_line = __LINE__; 1099 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0)) 1100 return (1); 1101 tsleep(fdc, PRIBIO, "fdrecal", hz); 1102 retry_line = __LINE__; 1103 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 1104 return (1); /* XXX */ 1105 retry_line = __LINE__; 1106 if ((st0 & 0xc0) || cyl != 0) 1107 return (1); 1108 need_recal &= ~(1 << fd->fdsu); 1109 fd->track = 0; 1110 /* let the heads settle */ 1111 if (settle) 1112 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle); 1113 } 1114 1115 /* 1116 * SEEK to where we want to be 1117 */ 1118 if (cylinder != fd->track) { 1119#ifdef PC98 1120 pc98_fd_check_ready(fd); 1121#endif 1122 retry_line = __LINE__; 1123 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, descyl, 0)) 1124 return (1); 1125 tsleep(fdc, PRIBIO, "fdseek", hz); 1126 retry_line = __LINE__; 1127 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 1128 return (1); /* XXX */ 1129 retry_line = __LINE__; 1130 if ((st0 & 0xc0) || cyl != descyl) { 1131 need_recal |= (1 << fd->fdsu); 1132 return (1); 1133 } 1134 /* let the heads settle */ 1135 if (settle) 1136 tsleep(fdc->fd, PRIBIO, "fdhdstl", settle); 1137 } 1138 fd->track = cylinder; 1139 1140 if (debugflags & 8) 1141 printf("op %x bn %ju siz %u ptr %p retry %d\n", 1142 bp->bio_cmd, bp->bio_pblkno, fd->fd_iosize, 1143 fd->fd_ioptr, fdc->retry); 1144 1145 /* Setup ISADMA if we need it and have it */ 1146 if ((bp->bio_cmd == BIO_READ || 1147 bp->bio_cmd == BIO_WRITE || 1148 bp->bio_cmd == BIO_FMT) 1149 && !(fdc->flags & FDC_NODMA)) { 1150 isa_dmastart( 1151 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE, 1152 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan); 1153 mtx_lock(&fdc->fdc_mtx); 1154 fd->flags |= FD_ISADMA; 1155 mtx_unlock(&fdc->fdc_mtx); 1156 } 1157 1158 /* Do PIO if we have to */ 1159 if (fdc->flags & FDC_NODMA) { 1160 if (bp->bio_cmd == BIO_READ || 1161 bp->bio_cmd == BIO_WRITE || 1162 bp->bio_cmd == BIO_FMT) 1163 fdbcdr_wr(fdc, 1, fd->fd_iosize); 1164 if (bp->bio_cmd == BIO_WRITE || 1165 bp->bio_cmd == BIO_FMT) 1166 fdc_pio(fdc); 1167 } 1168 1169 switch(bp->bio_cmd) { 1170 case BIO_FMT: 1171 /* formatting */ 1172 finfo = (struct fd_formb *)bp->bio_data; 1173 retry_line = __LINE__; 1174 if (fdc_cmd(fdc, 6, 1175 NE7CMD_FORMAT | mfm, 1176 head << 2 | fd->fdsu, 1177 finfo->fd_formb_secshift, 1178 finfo->fd_formb_nsecs, 1179 finfo->fd_formb_gaplen, 1180 finfo->fd_formb_fillbyte, 0)) 1181 return (1); 1182 break; 1183 case BIO_RDID: 1184 retry_line = __LINE__; 1185 if (fdc_cmd(fdc, 2, 1186 NE7CMD_READID | mfm, 1187 head << 2 | fd->fdsu, 0)) 1188 return (1); 1189 break; 1190 case BIO_READ: 1191 retry_line = __LINE__; 1192 if (fdc_cmd(fdc, 9, 1193 NE7CMD_READ | NE7CMD_SK | mfm | NE7CMD_MT, 1194 head << 2 | fd->fdsu, /* head & unit */ 1195 fd->track, /* track */ 1196 head, /* head */ 1197 sec, /* sector + 1 */ 1198 fd->ft->secsize, /* sector size */ 1199 fd->ft->sectrac, /* sectors/track */ 1200 fd->ft->gap, /* gap size */ 1201 fd->ft->datalen, /* data length */ 1202 0)) 1203 return (1); 1204 break; 1205 case BIO_WRITE: 1206 retry_line = __LINE__; 1207 if (fdc_cmd(fdc, 9, 1208 NE7CMD_WRITE | mfm | NE7CMD_MT, 1209 head << 2 | fd->fdsu, /* head & unit */ 1210 fd->track, /* track */ 1211 head, /* head */ 1212 sec, /* sector + 1 */ 1213 fd->ft->secsize, /* sector size */ 1214 fd->ft->sectrac, /* sectors/track */ 1215 fd->ft->gap, /* gap size */ 1216 fd->ft->datalen, /* data length */ 1217 0)) 1218 return (1); 1219 break; 1220 default: 1221 KASSERT(0 == 1, ("Wrong bio_cmd %x\n", bp->bio_cmd)); 1222 } 1223 1224 /* Wait for interrupt */ 1225 i = tsleep(fdc, PRIBIO, "fddata", hz); 1226 1227 /* PIO if the read looks good */ 1228 if (i == 0 && (fdc->flags & FDC_NODMA) && (bp->bio_cmd == BIO_READ)) 1229 fdc_pio(fdc); 1230 1231 /* Finish DMA */ 1232 if (fd->flags & FD_ISADMA) { 1233 isa_dmadone( 1234 bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE, 1235 fd->fd_ioptr, fd->fd_iosize, fdc->dmachan); 1236 mtx_lock(&fdc->fdc_mtx); 1237 fd->flags &= ~FD_ISADMA; 1238 mtx_unlock(&fdc->fdc_mtx); 1239 } 1240 1241 if (i != 0) { 1242 /* 1243 * Timeout. 1244 * 1245 * Due to IBM's brain-dead design, the FDC has a faked ready 1246 * signal, hardwired to ready == true. Thus, any command 1247 * issued if there's no diskette in the drive will _never_ 1248 * complete, and must be aborted by resetting the FDC. 1249 * Many thanks, Big Blue! 1250 */ 1251 retry_line = __LINE__; 1252 fdc->flags |= FDC_NEEDS_RESET; 1253 return (1); 1254 } 1255 1256 retry_line = __LINE__; 1257 if (fdc_read_status(fdc)) 1258 return (1); 1259 1260 if (debugflags & 0x10) 1261 printf(" -> %x %x %x %x\n", 1262 fdc->status[0], fdc->status[1], 1263 fdc->status[2], fdc->status[3]); 1264 1265 st0 = fdc->status[0] & NE7_ST0_IC; 1266 if (st0 != 0) { 1267 retry_line = __LINE__; 1268 if (st0 == NE7_ST0_IC_AT && fdc->status[1] & NE7_ST1_OR) { 1269 /* 1270 * DMA overrun. Someone hogged the bus and 1271 * didn't release it in time for the next 1272 * FDC transfer. 1273 */ 1274 return (1); 1275 } 1276 retry_line = __LINE__; 1277 if(st0 == NE7_ST0_IC_IV) { 1278 fdc->flags |= FDC_NEEDS_RESET; 1279 return (1); 1280 } 1281 retry_line = __LINE__; 1282 if(st0 == NE7_ST0_IC_AT && fdc->status[2] & NE7_ST2_WC) { 1283 need_recal |= (1 << fd->fdsu); 1284 return (1); 1285 } 1286 if (debugflags & 0x20) { 1287 printf("status %02x %02x %02x %02x %02x %02x\n", 1288 fdc->status[0], fdc->status[1], fdc->status[2], 1289 fdc->status[3], fdc->status[4], fdc->status[5]); 1290 } 1291 retry_line = __LINE__; 1292 if (fd->options & FDOPT_NOERROR) 1293 override_error = 1; 1294 else 1295 return (1); 1296 } 1297 /* All OK */ 1298 switch(bp->bio_cmd) { 1299 case BIO_RDID: 1300 /* copy out ID field contents */ 1301 idp = (struct fdc_readid *)bp->bio_data; 1302 idp->cyl = fdc->status[3]; 1303 idp->head = fdc->status[4]; 1304 idp->sec = fdc->status[5]; 1305 idp->secshift = fdc->status[6]; 1306 if (debugflags & 0x40) 1307 printf("c %d h %d s %d z %d\n", 1308 idp->cyl, idp->head, idp->sec, idp->secshift); 1309 break; 1310 case BIO_READ: 1311 case BIO_WRITE: 1312 bp->bio_pblkno += nsect; 1313 bp->bio_resid -= fd->fd_iosize; 1314 bp->bio_completed += fd->fd_iosize; 1315 fd->fd_ioptr += fd->fd_iosize; 1316 if (override_error) { 1317 if ((debugflags & 4)) 1318 printf("FDOPT_NOERROR: returning bad data\n"); 1319 } else { 1320 /* Since we managed to get something done, 1321 * reset the retry */ 1322 fdc->retry = 0; 1323 if (bp->bio_resid > 0) 1324 return (0); 1325 } 1326 break; 1327 case BIO_FMT: 1328 break; 1329 } 1330 return (fdc_biodone(fdc, 0)); 1331} 1332 1333static void 1334fdc_thread(void *arg) 1335{ 1336 struct fdc_data *fdc; 1337 1338 fdc = arg; 1339 int i; 1340 1341 mtx_lock(&fdc->fdc_mtx); 1342 fdc->flags |= FDC_KTHREAD_ALIVE; 1343 while ((fdc->flags & FDC_KTHREAD_EXIT) == 0) { 1344 mtx_unlock(&fdc->fdc_mtx); 1345 i = fdc_worker(fdc); 1346 if (i && debugflags & 0x20) { 1347 if (fdc->bp != NULL) { 1348 g_print_bio(fdc->bp); 1349 printf("\n"); 1350 } 1351 printf("Retry line %d\n", retry_line); 1352 } 1353 fdc->retry += i; 1354 mtx_lock(&fdc->fdc_mtx); 1355 } 1356 fdc->flags &= ~(FDC_KTHREAD_EXIT | FDC_KTHREAD_ALIVE); 1357 mtx_unlock(&fdc->fdc_mtx); 1358 1359 kproc_exit(0); 1360} 1361 1362/* 1363 * Enqueue a request. 1364 */ 1365static void 1366fd_enqueue(struct fd_data *fd, struct bio *bp) 1367{ 1368 struct fdc_data *fdc; 1369 int call; 1370 1371 call = 0; 1372 fdc = fd->fdc; 1373 mtx_lock(&fdc->fdc_mtx); 1374 /* If we go from idle, cancel motor turnoff */ 1375 if (fd->fd_iocount++ == 0) 1376 callout_stop(&fd->toffhandle); 1377 if (fd->flags & FD_MOTOR) { 1378 /* The motor is on, send it directly to the controller */ 1379 bioq_disksort(&fdc->head, bp); 1380 wakeup(&fdc->head); 1381 } else { 1382 /* Queue it on the drive until the motor has started */ 1383 bioq_insert_tail(&fd->fd_bq, bp); 1384 if (!(fd->flags & FD_MOTORWAIT)) 1385 fd_motor(fd, 1); 1386 } 1387 mtx_unlock(&fdc->fdc_mtx); 1388} 1389 1390/* 1391 * Try to find out if we have a disk in the drive. 1392 */ 1393static int 1394fd_probe_disk(struct fd_data *fd, int *recal) 1395{ 1396 struct fdc_data *fdc; 1397 int st0, st3, cyl; 1398 int oopts, ret; 1399 1400 fdc = fd->fdc; 1401 oopts = fd->options; 1402 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY; 1403 ret = 1; 1404 1405 /* 1406 * First recal, then seek to cyl#1, this clears the old condition on 1407 * the disk change line so we can examine it for current status. 1408 */ 1409 if (debugflags & 0x40) 1410 printf("New disk in probe\n"); 1411 mtx_lock(&fdc->fdc_mtx); 1412 fd->flags |= FD_NEWDISK; 1413 mtx_unlock(&fdc->fdc_mtx); 1414 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0)) 1415 goto done; 1416 tsleep(fdc, PRIBIO, "fdrecal", hz); 1417 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 1418 goto done; /* XXX */ 1419 if ((st0 & 0xc0) || cyl != 0) 1420 goto done; 1421 1422 /* Seek to track 1 */ 1423 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, 1, 0)) 1424 goto done; 1425 tsleep(fdc, PRIBIO, "fdseek", hz); 1426 if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 1427 goto done; /* XXX */ 1428 *recal |= (1 << fd->fdsu); 1429#ifndef PC98 1430 if (fdin_rd(fdc) & FDI_DCHG) { 1431 if (debugflags & 0x40) 1432 printf("Empty in probe\n"); 1433 mtx_lock(&fdc->fdc_mtx); 1434 fd->flags |= FD_EMPTY; 1435 mtx_unlock(&fdc->fdc_mtx); 1436 } else { 1437#else 1438 { 1439#endif 1440 if (fdc_sense_drive(fdc, &st3) != 0) 1441 goto done; 1442 if (debugflags & 0x40) 1443 printf("Got disk in probe\n"); 1444 mtx_lock(&fdc->fdc_mtx); 1445 fd->flags &= ~FD_EMPTY; 1446 if (st3 & NE7_ST3_WP) 1447 fd->flags |= FD_WP; 1448 else 1449 fd->flags &= ~FD_WP; 1450 mtx_unlock(&fdc->fdc_mtx); 1451 } 1452 ret = 0; 1453 1454done: 1455 fd->options = oopts; 1456 return (ret); 1457} 1458 1459static int 1460fdmisccmd(struct fd_data *fd, u_int cmd, void *data) 1461{ 1462 struct bio *bp; 1463 struct fd_formb *finfo; 1464 struct fdc_readid *idfield; 1465 int error; 1466 1467 bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO); 1468 1469 /* 1470 * Set up a bio request for fdstrategy(). bio_offset is faked 1471 * so that fdstrategy() will seek to the requested 1472 * cylinder, and use the desired head. 1473 */ 1474 bp->bio_cmd = cmd; 1475 if (cmd == BIO_FMT) { 1476 finfo = (struct fd_formb *)data; 1477 bp->bio_pblkno = 1478 (finfo->cyl * fd->ft->heads + finfo->head) * 1479 fd->ft->sectrac; 1480 bp->bio_length = sizeof *finfo; 1481 } else if (cmd == BIO_RDID) { 1482 idfield = (struct fdc_readid *)data; 1483 bp->bio_pblkno = 1484 (idfield->cyl * fd->ft->heads + idfield->head) * 1485 fd->ft->sectrac; 1486 bp->bio_length = sizeof(struct fdc_readid); 1487 } else if (cmd == BIO_PROBE) { 1488 /* nothing */ 1489 } else 1490 panic("wrong cmd in fdmisccmd()"); 1491 bp->bio_offset = bp->bio_pblkno * fd->sectorsize; 1492 bp->bio_data = data; 1493 bp->bio_driver1 = fd; 1494 bp->bio_flags = 0; 1495 1496 fd_enqueue(fd, bp); 1497 1498 do { 1499 tsleep(bp, PRIBIO, "fdwait", hz); 1500 } while (!(bp->bio_flags & BIO_DONE)); 1501 error = bp->bio_error; 1502 1503 free(bp, M_TEMP); 1504 return (error); 1505} 1506 1507/* 1508 * Try figuring out the density of the media present in our device. 1509 */ 1510static int 1511fdautoselect(struct fd_data *fd) 1512{ 1513 struct fd_type *fdtp; 1514 struct fdc_readid id; 1515 int oopts, rv; 1516 1517 if (!(fd->ft->flags & FL_AUTO)) 1518 return (0); 1519 1520 fdtp = fd_native_types[fd->type]; 1521 fdsettype(fd, fdtp); 1522 if (!(fd->ft->flags & FL_AUTO)) 1523 return (0); 1524 1525 /* 1526 * Try reading sector ID fields, first at cylinder 0, head 0, 1527 * then at cylinder 2, head N. We don't probe cylinder 1, 1528 * since for 5.25in DD media in a HD drive, there are no data 1529 * to read (2 step pulses per media cylinder required). For 1530 * two-sided media, the second probe always goes to head 1, so 1531 * we can tell them apart from single-sided media. As a 1532 * side-effect this means that single-sided media should be 1533 * mentioned in the search list after two-sided media of an 1534 * otherwise identical density. Media with a different number 1535 * of sectors per track but otherwise identical parameters 1536 * cannot be distinguished at all. 1537 * 1538 * If we successfully read an ID field on both cylinders where 1539 * the recorded values match our expectation, we are done. 1540 * Otherwise, we try the next density entry from the table. 1541 * 1542 * Stepping to cylinder 2 has the side-effect of clearing the 1543 * unit attention bit. 1544 */ 1545 oopts = fd->options; 1546 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY; 1547 for (; fdtp->heads; fdtp++) { 1548 fdsettype(fd, fdtp); 1549 1550 id.cyl = id.head = 0; 1551 rv = fdmisccmd(fd, BIO_RDID, &id); 1552 if (rv != 0) 1553 continue; 1554 if (id.cyl != 0 || id.head != 0 || id.secshift != fdtp->secsize) 1555 continue; 1556 id.cyl = 2; 1557 id.head = fd->ft->heads - 1; 1558 rv = fdmisccmd(fd, BIO_RDID, &id); 1559 if (id.cyl != 2 || id.head != fdtp->heads - 1 || 1560 id.secshift != fdtp->secsize) 1561 continue; 1562 if (rv == 0) 1563 break; 1564 } 1565 1566 fd->options = oopts; 1567 if (fdtp->heads == 0) { 1568 if (debugflags & 0x40) 1569 device_printf(fd->dev, "autoselection failed\n"); 1570 fdsettype(fd, fd_native_types[fd->type]); 1571 return (-1); 1572 } else { 1573 if (debugflags & 0x40) { 1574 device_printf(fd->dev, 1575 "autoselected %d KB medium\n", 1576#ifdef PC98 1577 (128 << (fd->ft->secsize)) * fd->ft->size / 1024); 1578#else 1579 fd->ft->size / 2); 1580#endif 1581 fdprinttype(fd->ft); 1582 } 1583 return (0); 1584 } 1585} 1586 1587/* 1588 * GEOM class implementation 1589 */ 1590 1591static g_access_t fd_access; 1592static g_start_t fd_start; 1593static g_ioctl_t fd_ioctl; 1594 1595struct g_class g_fd_class = { 1596 .name = "FD", 1597 .version = G_VERSION, 1598 .start = fd_start, 1599 .access = fd_access, 1600 .ioctl = fd_ioctl, 1601}; 1602 1603static int 1604fd_access(struct g_provider *pp, int r, int w, int e) 1605{ 1606 struct fd_data *fd; 1607 struct fdc_data *fdc; 1608 int ar, aw, ae; 1609 int busy; 1610 1611 fd = pp->geom->softc; 1612 fdc = fd->fdc; 1613 1614 /* 1615 * If our provider is withering, we can only get negative requests 1616 * and we don't want to even see them 1617 */ 1618 if (pp->flags & G_PF_WITHER) 1619 return (0); 1620 1621 ar = r + pp->acr; 1622 aw = w + pp->acw; 1623 ae = e + pp->ace; 1624 1625 if (ar == 0 && aw == 0 && ae == 0) { 1626 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR); 1627 device_unbusy(fd->dev); 1628 return (0); 1629 } 1630 1631 busy = 0; 1632 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) { 1633#ifdef PC98 1634 if (pc98_fd_check_ready(fd) == -1) 1635 return (ENXIO); 1636#endif 1637 if (fdmisccmd(fd, BIO_PROBE, NULL)) 1638 return (ENXIO); 1639 if (fd->flags & FD_EMPTY) 1640 return (ENXIO); 1641 if (fd->flags & FD_NEWDISK) { 1642 if (fdautoselect(fd) != 0 && 1643 (device_get_flags(fd->dev) & FD_NO_CHLINE)) { 1644 mtx_lock(&fdc->fdc_mtx); 1645 fd->flags |= FD_EMPTY; 1646 mtx_unlock(&fdc->fdc_mtx); 1647 return (ENXIO); 1648 } 1649 mtx_lock(&fdc->fdc_mtx); 1650 fd->flags &= ~FD_NEWDISK; 1651 mtx_unlock(&fdc->fdc_mtx); 1652 } 1653 device_busy(fd->dev); 1654 busy = 1; 1655 } 1656 1657 if (w > 0 && (fd->flags & FD_WP)) { 1658 if (busy) 1659 device_unbusy(fd->dev); 1660 return (EROFS); 1661 } 1662 1663 pp->sectorsize = fd->sectorsize; 1664 pp->stripesize = fd->ft->heads * fd->ft->sectrac * fd->sectorsize; 1665 pp->mediasize = pp->stripesize * fd->ft->tracks; 1666 return (0); 1667} 1668 1669static void 1670fd_start(struct bio *bp) 1671{ 1672 struct fdc_data * fdc; 1673 struct fd_data * fd; 1674 1675 fd = bp->bio_to->geom->softc; 1676 fdc = fd->fdc; 1677 bp->bio_driver1 = fd; 1678 if (bp->bio_cmd == BIO_GETATTR) { 1679 if (g_handleattr_int(bp, "GEOM::fwsectors", fd->ft->sectrac)) 1680 return; 1681 if (g_handleattr_int(bp, "GEOM::fwheads", fd->ft->heads)) 1682 return; 1683 g_io_deliver(bp, ENOIOCTL); 1684 return; 1685 } 1686 if (!(bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE)) { 1687 g_io_deliver(bp, EOPNOTSUPP); 1688 return; 1689 } 1690 bp->bio_pblkno = bp->bio_offset / fd->sectorsize; 1691 bp->bio_resid = bp->bio_length; 1692 fd_enqueue(fd, bp); 1693 return; 1694} 1695 1696static int 1697fd_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td) 1698{ 1699 struct fd_data *fd; 1700 struct fdc_status *fsp; 1701 struct fdc_readid *rid; 1702 int error; 1703 1704 fd = pp->geom->softc; 1705 1706#ifdef PC98 1707 pc98_fd_check_ready(fd); 1708#endif 1709 1710 switch (cmd) { 1711 case FD_GTYPE: /* get drive type */ 1712 *(struct fd_type *)data = *fd->ft; 1713 return (0); 1714 1715 case FD_STYPE: /* set drive type */ 1716 /* 1717 * Allow setting drive type temporarily iff 1718 * currently unset. Used for fdformat so any 1719 * user can set it, and then start formatting. 1720 */ 1721 fd->fts = *(struct fd_type *)data; 1722 if (fd->fts.sectrac) { 1723 /* XXX: check for rubbish */ 1724 fdsettype(fd, &fd->fts); 1725 } else { 1726 fdsettype(fd, fd_native_types[fd->type]); 1727 } 1728 if (debugflags & 0x40) 1729 fdprinttype(fd->ft); 1730 return (0); 1731 1732 case FD_GOPTS: /* get drive options */ 1733 *(int *)data = fd->options; 1734 return (0); 1735 1736 case FD_SOPTS: /* set drive options */ 1737 fd->options = *(int *)data; 1738 return (0); 1739 1740 case FD_CLRERR: 1741 error = priv_check(td, PRIV_DRIVER); 1742 if (error) 1743 return (error); 1744 fd->fdc->fdc_errs = 0; 1745 return (0); 1746 1747 case FD_GSTAT: 1748 fsp = (struct fdc_status *)data; 1749 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 1750 return (EINVAL); 1751 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 1752 return (0); 1753 1754 case FD_GDTYPE: 1755 *(enum fd_drivetype *)data = fd->type; 1756 return (0); 1757 1758 case FD_FORM: 1759 if (!(fflag & FWRITE)) 1760 return (EPERM); 1761 if (((struct fd_formb *)data)->format_version != 1762 FD_FORMAT_VERSION) 1763 return (EINVAL); /* wrong version of formatting prog */ 1764 error = fdmisccmd(fd, BIO_FMT, data); 1765 mtx_lock(&fd->fdc->fdc_mtx); 1766 fd->flags |= FD_NEWDISK; 1767 mtx_unlock(&fd->fdc->fdc_mtx); 1768 break; 1769 1770 case FD_READID: 1771 rid = (struct fdc_readid *)data; 1772 if (rid->cyl > 85 || rid->head > 1) 1773 return (EINVAL); 1774 error = fdmisccmd(fd, BIO_RDID, data); 1775 break; 1776 1777 case FIONBIO: 1778 case FIOASYNC: 1779 /* For backwards compat with old fd*(8) tools */ 1780 error = 0; 1781 break; 1782 1783 default: 1784 if (debugflags & 0x80) 1785 printf("Unknown ioctl %lx\n", cmd); 1786 error = ENOIOCTL; 1787 break; 1788 } 1789 return (error); 1790}; 1791 1792 1793 1794/* 1795 * Configuration/initialization stuff, per controller. 1796 */ 1797 1798devclass_t fdc_devclass; 1799static devclass_t fd_devclass; 1800 1801struct fdc_ivars { 1802 int fdunit; 1803 int fdtype; 1804}; 1805 1806void 1807fdc_release_resources(struct fdc_data *fdc) 1808{ 1809 device_t dev; 1810 struct resource *last; 1811 int i; 1812 1813 dev = fdc->fdc_dev; 1814 if (fdc->fdc_intr) 1815 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr); 1816 fdc->fdc_intr = NULL; 1817 if (fdc->res_irq != NULL) 1818 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 1819 fdc->res_irq); 1820 fdc->res_irq = NULL; 1821 last = NULL; 1822 for (i = 0; i < FDC_MAXREG; i++) { 1823 if (fdc->resio[i] != NULL && fdc->resio[i] != last) { 1824 bus_release_resource(dev, SYS_RES_IOPORT, 1825 fdc->ridio[i], fdc->resio[i]); 1826 last = fdc->resio[i]; 1827 fdc->resio[i] = NULL; 1828 } 1829 } 1830 if (fdc->res_drq != NULL) 1831 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 1832 fdc->res_drq); 1833 fdc->res_drq = NULL; 1834} 1835 1836int 1837fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 1838{ 1839 struct fdc_ivars *ivars = device_get_ivars(child); 1840 1841 switch (which) { 1842 case FDC_IVAR_FDUNIT: 1843 *result = ivars->fdunit; 1844 break; 1845 case FDC_IVAR_FDTYPE: 1846 *result = ivars->fdtype; 1847 break; 1848 default: 1849 return (ENOENT); 1850 } 1851 return (0); 1852} 1853 1854int 1855fdc_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 1856{ 1857 struct fdc_ivars *ivars = device_get_ivars(child); 1858 1859 switch (which) { 1860 case FDC_IVAR_FDUNIT: 1861 ivars->fdunit = value; 1862 break; 1863 case FDC_IVAR_FDTYPE: 1864 ivars->fdtype = value; 1865 break; 1866 default: 1867 return (ENOENT); 1868 } 1869 return (0); 1870} 1871 1872int 1873fdc_initial_reset(device_t dev, struct fdc_data *fdc) 1874{ 1875 int ic_type, part_id; 1876 1877#ifdef PC98 1878 /* See if it can handle a command. */ 1879 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(4, 240), 1880 NE7_SPEC_2(2, 0), 0)) 1881 return (ENXIO); 1882#else 1883 /* 1884 * A status value of 0xff is very unlikely, but not theoretically 1885 * impossible, but it is far more likely to indicate an empty bus. 1886 */ 1887 if (fdsts_rd(fdc) == 0xff) 1888 return (ENXIO); 1889 1890 /* 1891 * Assert a reset to the floppy controller and check that the status 1892 * register goes to zero. 1893 */ 1894 fdout_wr(fdc, 0); 1895 fdout_wr(fdc, 0); 1896 if (fdsts_rd(fdc) != 0) 1897 return (ENXIO); 1898 1899 /* 1900 * Clear the reset and see it come ready. 1901 */ 1902 fdout_wr(fdc, FDO_FRST); 1903 DELAY(100); 1904 if (fdsts_rd(fdc) != 0x80) 1905 return (ENXIO); 1906 1907 /* Then, see if it can handle a command. */ 1908 if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(6, 240), 1909 NE7_SPEC_2(31, 0), 0)) 1910 return (ENXIO); 1911#endif 1912 1913 /* 1914 * Try to identify the chip. 1915 * 1916 * The i8272 datasheet documents that unknown commands 1917 * will return ST0 as 0x80. The i8272 is supposedly identical 1918 * to the NEC765. 1919 * The i82077SL datasheet says 0x90 for the VERSION command, 1920 * and several "superio" chips emulate this. 1921 */ 1922 if (fdc_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type)) 1923 return (ENXIO); 1924 if (fdc_cmd(fdc, 1, 0x18, 1, &part_id)) 1925 return (ENXIO); 1926 if (bootverbose) 1927 device_printf(dev, 1928 "ic_type %02x part_id %02x\n", ic_type, part_id); 1929 switch (ic_type & 0xff) { 1930 case 0x80: 1931 device_set_desc(dev, "NEC 765 or clone"); 1932 fdc->fdct = FDC_NE765; 1933 break; 1934 case 0x81: 1935 case 0x90: 1936 device_set_desc(dev, 1937 "Enhanced floppy controller"); 1938 fdc->fdct = FDC_ENHANCED; 1939 break; 1940 default: 1941 device_set_desc(dev, "Generic floppy controller"); 1942 fdc->fdct = FDC_UNKNOWN; 1943 break; 1944 } 1945 return (0); 1946} 1947 1948int 1949fdc_detach(device_t dev) 1950{ 1951 struct fdc_data *fdc; 1952 int error; 1953 1954 fdc = device_get_softc(dev); 1955 1956 /* have our children detached first */ 1957 if ((error = bus_generic_detach(dev))) 1958 return (error); 1959 1960 if (fdc->fdc_intr) 1961 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr); 1962 fdc->fdc_intr = NULL; 1963 1964 /* kill worker thread */ 1965 mtx_lock(&fdc->fdc_mtx); 1966 fdc->flags |= FDC_KTHREAD_EXIT; 1967 wakeup(&fdc->head); 1968 while ((fdc->flags & FDC_KTHREAD_ALIVE) != 0) 1969 msleep(fdc->fdc_thread, &fdc->fdc_mtx, PRIBIO, "fdcdet", 0); 1970 mtx_unlock(&fdc->fdc_mtx); 1971 1972 /* reset controller, turn motor off */ 1973#ifdef PC98 1974 fdc_reset(fdc); 1975#else 1976 fdout_wr(fdc, 0); 1977#endif 1978 1979 if (!(fdc->flags & FDC_NODMA)) 1980 isa_dma_release(fdc->dmachan); 1981 fdc_release_resources(fdc); 1982 mtx_destroy(&fdc->fdc_mtx); 1983 return (0); 1984} 1985 1986/* 1987 * Add a child device to the fdc controller. It will then be probed etc. 1988 */ 1989device_t 1990fdc_add_child(device_t dev, const char *name, int unit) 1991{ 1992 struct fdc_ivars *ivar; 1993 device_t child; 1994 1995 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO); 1996 if (ivar == NULL) 1997 return (NULL); 1998 child = device_add_child(dev, name, unit); 1999 if (child == NULL) { 2000 free(ivar, M_DEVBUF); 2001 return (NULL); 2002 } 2003 device_set_ivars(child, ivar); 2004 ivar->fdunit = unit; 2005 ivar->fdtype = FDT_NONE; 2006 if (resource_disabled(name, unit)) 2007 device_disable(child); 2008 return (child); 2009} 2010 2011int 2012fdc_attach(device_t dev) 2013{ 2014 struct fdc_data *fdc; 2015 int error; 2016 2017 fdc = device_get_softc(dev); 2018 fdc->fdc_dev = dev; 2019 error = fdc_initial_reset(dev, fdc); 2020 if (error) { 2021 device_printf(dev, "does not respond\n"); 2022 return (error); 2023 } 2024 error = bus_setup_intr(dev, fdc->res_irq, 2025 INTR_TYPE_BIO | INTR_ENTROPY | 2026 ((fdc->flags & FDC_NOFAST) ? INTR_MPSAFE : 0), 2027 ((fdc->flags & FDC_NOFAST) ? NULL : fdc_intr_fast), 2028 ((fdc->flags & FDC_NOFAST) ? fdc_intr : NULL), 2029 fdc, &fdc->fdc_intr); 2030 if (error) { 2031 device_printf(dev, "cannot setup interrupt\n"); 2032 return (error); 2033 } 2034 if (!(fdc->flags & FDC_NODMA)) { 2035 error = isa_dma_acquire(fdc->dmachan); 2036 if (!error) { 2037 error = isa_dma_init(fdc->dmachan, 2038 MAX_BYTES_PER_CYL, M_WAITOK); 2039 if (error) 2040 isa_dma_release(fdc->dmachan); 2041 } 2042 if (error) 2043 return (error); 2044 } 2045 fdc->fdcu = device_get_unit(dev); 2046 fdc->flags |= FDC_NEEDS_RESET; 2047 2048 mtx_init(&fdc->fdc_mtx, "fdc lock", NULL, MTX_DEF); 2049 2050 /* reset controller, turn motor off, clear fdout mirror reg */ 2051#ifdef PC98 2052 fdc_reset(fdc); 2053#else 2054 fdout_wr(fdc, fdc->fdout = 0); 2055#endif 2056 bioq_init(&fdc->head); 2057 2058 kproc_create(fdc_thread, fdc, &fdc->fdc_thread, 0, 0, 2059 "fdc%d", device_get_unit(dev)); 2060 2061 settle = hz / 8; 2062 2063 return (0); 2064} 2065 2066int 2067fdc_hints_probe(device_t dev) 2068{ 2069 const char *name, *dname; 2070 int i, error, dunit; 2071 2072 /* 2073 * Probe and attach any children. We should probably detect 2074 * devices from the BIOS unless overridden. 2075 */ 2076 name = device_get_nameunit(dev); 2077 i = 0; 2078 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) { 2079 resource_int_value(dname, dunit, "drive", &dunit); 2080 fdc_add_child(dev, dname, dunit); 2081 } 2082 2083 if ((error = bus_generic_attach(dev)) != 0) 2084 return (error); 2085 return (0); 2086} 2087 2088int 2089fdc_print_child(device_t me, device_t child) 2090{ 2091 int retval = 0, flags; 2092 2093 retval += bus_print_child_header(me, child); 2094 retval += printf(" on %s drive %d", device_get_nameunit(me), 2095 fdc_get_fdunit(child)); 2096 if ((flags = device_get_flags(me)) != 0) 2097 retval += printf(" flags %#x", flags); 2098 retval += printf("\n"); 2099 2100 return (retval); 2101} 2102 2103/* 2104 * Configuration/initialization, per drive. 2105 */ 2106static int 2107fd_probe(device_t dev) 2108{ 2109 int unit; 2110#ifndef PC98 2111 int i; 2112 u_int st0, st3; 2113#endif 2114 struct fd_data *fd; 2115 struct fdc_data *fdc; 2116 int fdsu; 2117 int flags, type; 2118 2119 fdsu = fdc_get_fdunit(dev); 2120 fd = device_get_softc(dev); 2121 fdc = device_get_softc(device_get_parent(dev)); 2122 flags = device_get_flags(dev); 2123 2124 fd->dev = dev; 2125 fd->fdc = fdc; 2126 fd->fdsu = fdsu; 2127 unit = device_get_unit(dev); 2128 2129 /* Auto-probe if fdinfo is present, but always allow override. */ 2130 type = flags & FD_TYPEMASK; 2131 if (type == FDT_NONE && (type = fdc_get_fdtype(dev)) != FDT_NONE) { 2132 fd->type = type; 2133 goto done; 2134 } else { 2135 /* make sure fdautoselect() will be called */ 2136 fd->flags = FD_EMPTY; 2137 fd->type = type; 2138 } 2139 2140#ifdef PC98 2141 pc98_fd_check_type(fd, unit); 2142#elif defined(__i386__) || defined(__amd64__) 2143 if (fd->type == FDT_NONE && (unit == 0 || unit == 1)) { 2144 /* Look up what the BIOS thinks we have. */ 2145 if (unit == 0) 2146 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4; 2147 else 2148 fd->type = rtcin(RTC_FDISKETTE) & 0x0f; 2149 if (fd->type == FDT_288M_1) 2150 fd->type = FDT_288M; 2151 } 2152#endif /* __i386__ || __amd64__ */ 2153 /* is there a unit? */ 2154 if (fd->type == FDT_NONE) 2155 return (ENXIO); 2156 2157#ifndef PC98 2158/* 2159 mtx_lock(&fdc->fdc_mtx); 2160*/ 2161 /* select it */ 2162 fd_select(fd); 2163 fd_motor(fd, 1); 2164 fdc->fd = fd; 2165 fdc_reset(fdc); /* XXX reset, then unreset, etc. */ 2166 DELAY(1000000); /* 1 sec */ 2167 2168 if ((flags & FD_NO_PROBE) == 0) { 2169 /* If we're at track 0 first seek inwards. */ 2170 if ((fdc_sense_drive(fdc, &st3) == 0) && 2171 (st3 & NE7_ST3_T0)) { 2172 /* Seek some steps... */ 2173 if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 2174 /* ...wait a moment... */ 2175 DELAY(300000); 2176 /* make ctrlr happy: */ 2177 fdc_sense_int(fdc, NULL, NULL); 2178 } 2179 } 2180 2181 for (i = 0; i < 2; i++) { 2182 /* 2183 * we must recalibrate twice, just in case the 2184 * heads have been beyond cylinder 76, since 2185 * most FDCs still barf when attempting to 2186 * recalibrate more than 77 steps 2187 */ 2188 /* go back to 0: */ 2189 if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 2190 /* a second being enough for full stroke seek*/ 2191 DELAY(i == 0 ? 1000000 : 300000); 2192 2193 /* anything responding? */ 2194 if (fdc_sense_int(fdc, &st0, NULL) == 0 && 2195 (st0 & NE7_ST0_EC) == 0) 2196 break; /* already probed succesfully */ 2197 } 2198 } 2199 } 2200 2201 fd_motor(fd, 0); 2202 fdc->fd = NULL; 2203/* 2204 mtx_unlock(&fdc->fdc_mtx); 2205*/ 2206 2207 if ((flags & FD_NO_PROBE) == 0 && 2208 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */ 2209 return (ENXIO); 2210#endif /* PC98 */ 2211 2212done: 2213 2214 switch (fd->type) { 2215#ifdef PC98 2216 case FDT_144M: 2217 device_set_desc(dev, "1.44M FDD"); 2218 break; 2219 case FDT_12M: 2220 device_set_desc(dev, "1M/640K FDD"); 2221 break; 2222#else 2223 case FDT_12M: 2224 device_set_desc(dev, "1200-KB 5.25\" drive"); 2225 break; 2226 case FDT_144M: 2227 device_set_desc(dev, "1440-KB 3.5\" drive"); 2228 break; 2229 case FDT_288M: 2230 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 2231 break; 2232 case FDT_360K: 2233 device_set_desc(dev, "360-KB 5.25\" drive"); 2234 break; 2235 case FDT_720K: 2236 device_set_desc(dev, "720-KB 3.5\" drive"); 2237 break; 2238#endif 2239 default: 2240 return (ENXIO); 2241 } 2242 fd->track = FD_NO_TRACK; 2243 fd->fdc = fdc; 2244 fd->fdsu = fdsu; 2245 fd->options = 0; 2246#ifdef PC98 2247 fd->pc98_trans = 0; 2248#endif 2249 callout_init_mtx(&fd->toffhandle, &fd->fdc->fdc_mtx, 0); 2250 2251 /* initialize densities for subdevices */ 2252 fdsettype(fd, fd_native_types[fd->type]); 2253 return (0); 2254} 2255 2256/* 2257 * We have to do this in a geom event because GEOM is not running 2258 * when fd_attach() is. 2259 * XXX: move fd_attach after geom like ata/scsi disks 2260 */ 2261static void 2262fd_attach2(void *arg, int flag) 2263{ 2264 struct fd_data *fd; 2265 2266 fd = arg; 2267 2268 fd->fd_geom = g_new_geomf(&g_fd_class, 2269 "fd%d", device_get_unit(fd->dev)); 2270 fd->fd_provider = g_new_providerf(fd->fd_geom, "%s", fd->fd_geom->name); 2271 fd->fd_geom->softc = fd; 2272 g_error_provider(fd->fd_provider, 0); 2273} 2274 2275static int 2276fd_attach(device_t dev) 2277{ 2278 struct fd_data *fd; 2279 2280 fd = device_get_softc(dev); 2281 g_post_event(fd_attach2, fd, M_WAITOK, NULL); 2282 fd->flags |= FD_EMPTY; 2283 bioq_init(&fd->fd_bq); 2284 2285 return (0); 2286} 2287 2288static void 2289fd_detach_geom(void *arg, int flag) 2290{ 2291 struct fd_data *fd = arg; 2292 2293 g_topology_assert(); 2294 g_wither_geom(fd->fd_geom, ENXIO); 2295} 2296 2297static int 2298fd_detach(device_t dev) 2299{ 2300 struct fd_data *fd; 2301 2302 fd = device_get_softc(dev); 2303 g_waitfor_event(fd_detach_geom, fd, M_WAITOK, NULL); 2304 while (device_get_state(dev) == DS_BUSY) 2305 tsleep(fd, PZERO, "fdd", hz/10); 2306 callout_drain(&fd->toffhandle); 2307 2308 return (0); 2309} 2310 2311static device_method_t fd_methods[] = { 2312 /* Device interface */ 2313 DEVMETHOD(device_probe, fd_probe), 2314 DEVMETHOD(device_attach, fd_attach), 2315 DEVMETHOD(device_detach, fd_detach), 2316 DEVMETHOD(device_shutdown, bus_generic_shutdown), 2317 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 2318 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 2319 { 0, 0 } 2320}; 2321 2322static driver_t fd_driver = { 2323 "fd", 2324 fd_methods, 2325 sizeof(struct fd_data) 2326}; 2327 2328static int 2329fdc_modevent(module_t mod, int type, void *data) 2330{ 2331 2332 return (g_modevent(NULL, type, &g_fd_class)); 2333} 2334 2335DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, fdc_modevent, 0); 2336