fdc.c revision 78971
1/* 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Don Ahn. 7 * 8 * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu) 9 * aided by the Linux floppy driver modifications from David Bateman 10 * (dbateman@eng.uts.edu.au). 11 * 12 * Copyright (c) 1993, 1994 by 13 * jc@irbs.UUCP (John Capo) 14 * vak@zebub.msk.su (Serge Vakulenko) 15 * ache@astral.msk.su (Andrew A. Chernov) 16 * 17 * Copyright (c) 1993, 1994, 1995 by 18 * joerg_wunsch@uriah.sax.de (Joerg Wunsch) 19 * dufault@hda.com (Peter Dufault) 20 * 21 * Copyright (c) 2001 Joerg Wunsch, 22 * joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) 23 * 24 * Redistribution and use in source and binary forms, with or without 25 * modification, are permitted provided that the following conditions 26 * are met: 27 * 1. Redistributions of source code must retain the above copyright 28 * notice, this list of conditions and the following disclaimer. 29 * 2. Redistributions in binary form must reproduce the above copyright 30 * notice, this list of conditions and the following disclaimer in the 31 * documentation and/or other materials provided with the distribution. 32 * 3. All advertising materials mentioning features or use of this software 33 * must display the following acknowledgement: 34 * This product includes software developed by the University of 35 * California, Berkeley and its contributors. 36 * 4. Neither the name of the University nor the names of its contributors 37 * may be used to endorse or promote products derived from this software 38 * without specific prior written permission. 39 * 40 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * from: @(#)fd.c 7.4 (Berkeley) 5/25/91 53 * $FreeBSD: head/sys/dev/fdc/fdc.c 78971 2001-06-29 15:30:48Z joerg $ 54 */ 55 56#include "opt_fdc.h" 57#include "card.h" 58 59#include <sys/param.h> 60#include <sys/systm.h> 61#include <sys/bio.h> 62#include <sys/bus.h> 63#include <sys/conf.h> 64#include <sys/devicestat.h> 65#include <sys/disklabel.h> 66#include <sys/fcntl.h> 67#include <sys/fdcio.h> 68#include <sys/kernel.h> 69#include <sys/lock.h> 70#include <sys/malloc.h> 71#include <sys/module.h> 72#include <sys/mutex.h> 73#include <sys/proc.h> 74#include <sys/syslog.h> 75 76#include <machine/bus.h> 77#include <sys/rman.h> 78 79#include <machine/clock.h> 80#include <machine/resource.h> 81#include <machine/stdarg.h> 82 83#include <isa/isavar.h> 84#include <isa/isareg.h> 85#include <isa/fdreg.h> 86#include <isa/fdc.h> 87#include <isa/rtc.h> 88 89/* configuration flags */ 90#define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */ 91#define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ 92 93/* internally used only, not really from CMOS: */ 94#define RTCFDT_144M_PRETENDED 0x1000 95 96/* error returns for fd_cmd() */ 97#define FD_FAILED -1 98#define FD_NOT_VALID -2 99#define FDC_ERRMAX 100 /* do not log more */ 100 101#define NUMTYPES 17 102#define NUMDENS (NUMTYPES - 7) 103 104#define NO_TYPE 0 /* must match NO_TYPE in ft.c */ 105#define FD_1720 1 106#define FD_1480 2 107#define FD_1440 3 108#define FD_1200 4 109#define FD_820 5 110#define FD_800 6 111#define FD_720 7 112#define FD_360 8 113#define FD_640 9 114#define FD_1232 10 115 116#define FD_1480in5_25 11 117#define FD_1440in5_25 12 118#define FD_820in5_25 13 119#define FD_800in5_25 14 120#define FD_720in5_25 15 121#define FD_360in5_25 16 122#define FD_640in5_25 17 123 124#define BIO_RDSECTID BIO_CMD1 125 126static struct fd_type fd_types[NUMTYPES] = 127{ 128{ 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */ 129{ 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */ 130{ 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */ 131{ 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */ 132{ 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */ 133{ 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */ 134{ 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */ 135{ 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */ 136{ 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */ 137{ 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */ 138 139{ 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */ 140{ 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */ 141{ 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */ 142{ 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */ 143{ 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */ 144{ 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */ 145{ 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */ 146}; 147 148#define DRVS_PER_CTLR 2 /* 2 floppies */ 149 150#define MAX_SEC_SIZE (128 << 3) 151#define MAX_CYLINDER 85 /* some people really stress their drives 152 * up to cyl 82 */ 153#define MAX_HEAD 1 154 155/***********************************************************************\ 156* Per controller structure. * 157\***********************************************************************/ 158static devclass_t fdc_devclass; 159 160/***********************************************************************\ 161* Per drive structure. * 162* N per controller (DRVS_PER_CTLR) * 163\***********************************************************************/ 164struct fd_data { 165 struct fdc_data *fdc; /* pointer to controller structure */ 166 int fdsu; /* this units number on this controller */ 167 int type; /* Drive type (FD_1440...) */ 168 struct fd_type *ft; /* pointer to the type descriptor */ 169 int flags; 170#define FD_OPEN 0x01 /* it's open */ 171#define FD_ACTIVE 0x02 /* it's active */ 172#define FD_MOTOR 0x04 /* motor should be on */ 173#define FD_MOTOR_WAIT 0x08 /* motor coming up */ 174 int skip; 175 int hddrv; 176#define FD_NO_TRACK -2 177 int track; /* where we think the head is */ 178 int options; /* user configurable options, see ioctl_fd.h */ 179 struct callout_handle toffhandle; 180 struct callout_handle tohandle; 181 struct devstat device_stats; 182 eventhandler_tag clonetag; 183 dev_t masterdev; 184 device_t dev; 185 fdu_t fdu; 186}; 187 188struct fdc_ivars { 189 int fdunit; 190}; 191static devclass_t fd_devclass; 192 193/***********************************************************************\ 194* Throughout this file the following conventions will be used: * 195* fd is a pointer to the fd_data struct for the drive in question * 196* fdc is a pointer to the fdc_data struct for the controller * 197* fdu is the floppy drive unit number * 198* fdcu is the floppy controller unit number * 199* fdsu is the floppy drive unit number on that controller. (sub-unit) * 200\***********************************************************************/ 201 202/* internal functions */ 203static driver_intr_t fdc_intr; 204static void set_motor(struct fdc_data *, int, int); 205# define TURNON 1 206# define TURNOFF 0 207static timeout_t fd_turnoff; 208static timeout_t fd_motor_on; 209static void fd_turnon(struct fd_data *); 210static void fdc_reset(fdc_p); 211static int fd_in(struct fdc_data *, int *); 212static int out_fdc(struct fdc_data *, int); 213static void fdstart(struct fdc_data *); 214static timeout_t fd_iotimeout; 215static timeout_t fd_pseudointr; 216static int fdstate(struct fdc_data *); 217static int retrier(struct fdc_data *); 218static int fdmisccmd(dev_t, u_int, void *); 219 220static int enable_fifo(fdc_p fdc); 221static void fd_clone (void *arg, char *name, int namelen, dev_t *dev); 222 223static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 224 225#ifdef FDC_DEBUG 226static char const * const fdstates[] = 227{ 228"DEVIDLE", 229"FINDWORK", 230"DOSEEK", 231"SEEKCOMPLETE", 232"IOCOMPLETE", 233"RECALCOMPLETE", 234"STARTRECAL", 235"RESETCTLR", 236"SEEKWAIT", 237"RECALWAIT", 238"MOTORWAIT", 239"IOTIMEDOUT", 240"RESETCOMPLETE", 241"PIOREAD", 242}; 243 244/* CAUTION: fd_debug causes huge amounts of logging output */ 245static int volatile fd_debug = 0; 246#define TRACE0(arg) if(fd_debug) printf(arg) 247#define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2) 248#else /* FDC_DEBUG */ 249#define TRACE0(arg) 250#define TRACE1(arg1, arg2) 251#endif /* FDC_DEBUG */ 252 253static void 254fdout_wr(fdc_p fdc, u_int8_t v) 255{ 256 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 257} 258 259static u_int8_t 260fdsts_rd(fdc_p fdc) 261{ 262 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 263} 264 265static void 266fddata_wr(fdc_p fdc, u_int8_t v) 267{ 268 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 269} 270 271static u_int8_t 272fddata_rd(fdc_p fdc) 273{ 274 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 275} 276 277static void 278fdctl_wr_isa(fdc_p fdc, u_int8_t v) 279{ 280 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 281} 282 283#if NCARD > 0 284static void 285fdctl_wr_pcmcia(fdc_p fdc, u_int8_t v) 286{ 287 bus_space_write_1(fdc->portt, fdc->porth, FDCTL+fdc->port_off, v); 288} 289#endif 290 291#if 0 292 293static u_int8_t 294fdin_rd(fdc_p fdc) 295{ 296 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 297} 298 299#endif 300 301/* 302 * The open function is named Fdopen() to avoid confusion with fdopen() 303 * in fd(4). The difference is now only meaningful for debuggers. 304 */ 305static d_open_t Fdopen; 306static d_close_t fdclose; 307static d_ioctl_t fdioctl; 308static d_strategy_t fdstrategy; 309 310#define CDEV_MAJOR 9 311static struct cdevsw fd_cdevsw = { 312 /* open */ Fdopen, 313 /* close */ fdclose, 314 /* read */ physread, 315 /* write */ physwrite, 316 /* ioctl */ fdioctl, 317 /* poll */ nopoll, 318 /* mmap */ nommap, 319 /* strategy */ fdstrategy, 320 /* name */ "fd", 321 /* maj */ CDEV_MAJOR, 322 /* dump */ nodump, 323 /* psize */ nopsize, 324 /* flags */ D_DISK, 325}; 326 327static int 328fdc_err(struct fdc_data *fdc, const char *s) 329{ 330 fdc->fdc_errs++; 331 if (s) { 332 if (fdc->fdc_errs < FDC_ERRMAX) 333 device_printf(fdc->fdc_dev, "%s", s); 334 else if (fdc->fdc_errs == FDC_ERRMAX) 335 device_printf(fdc->fdc_dev, "too many errors, not " 336 "logging any more\n"); 337 } 338 339 return FD_FAILED; 340} 341 342/* 343 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 344 * Unit number, 345 * # of output bytes, output bytes as ints ..., 346 * # of input bytes, input bytes as ints ... 347 */ 348static int 349fd_cmd(struct fdc_data *fdc, int n_out, ...) 350{ 351 u_char cmd; 352 int n_in; 353 int n; 354 va_list ap; 355 356 va_start(ap, n_out); 357 cmd = (u_char)(va_arg(ap, int)); 358 va_end(ap); 359 va_start(ap, n_out); 360 for (n = 0; n < n_out; n++) 361 { 362 if (out_fdc(fdc, va_arg(ap, int)) < 0) 363 { 364 char msg[50]; 365 snprintf(msg, sizeof(msg), 366 "cmd %x failed at out byte %d of %d\n", 367 cmd, n + 1, n_out); 368 return fdc_err(fdc, msg); 369 } 370 } 371 n_in = va_arg(ap, int); 372 for (n = 0; n < n_in; n++) 373 { 374 int *ptr = va_arg(ap, int *); 375 if (fd_in(fdc, ptr) < 0) 376 { 377 char msg[50]; 378 snprintf(msg, sizeof(msg), 379 "cmd %02x failed at in byte %d of %d\n", 380 cmd, n + 1, n_in); 381 return fdc_err(fdc, msg); 382 } 383 } 384 385 return 0; 386} 387 388static int 389enable_fifo(fdc_p fdc) 390{ 391 int i, j; 392 393 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 394 395 /* 396 * Cannot use fd_cmd the normal way here, since 397 * this might be an invalid command. Thus we send the 398 * first byte, and check for an early turn of data directon. 399 */ 400 401 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 402 return fdc_err(fdc, "Enable FIFO failed\n"); 403 404 /* If command is invalid, return */ 405 j = 100000; 406 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 407 != NE7_RQM && j-- > 0) 408 if (i == (NE7_DIO | NE7_RQM)) { 409 fdc_reset(fdc); 410 return FD_FAILED; 411 } 412 if (j<0 || 413 fd_cmd(fdc, 3, 414 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 415 fdc_reset(fdc); 416 return fdc_err(fdc, "Enable FIFO failed\n"); 417 } 418 fdc->flags |= FDC_HAS_FIFO; 419 return 0; 420 } 421 if (fd_cmd(fdc, 4, 422 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 423 return fdc_err(fdc, "Re-enable FIFO failed\n"); 424 return 0; 425} 426 427static int 428fd_sense_drive_status(fdc_p fdc, int *st3p) 429{ 430 int st3; 431 432 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 433 { 434 return fdc_err(fdc, "Sense Drive Status failed\n"); 435 } 436 if (st3p) 437 *st3p = st3; 438 439 return 0; 440} 441 442static int 443fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 444{ 445 int cyl, st0, ret; 446 447 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 448 if (ret) { 449 (void)fdc_err(fdc, 450 "sense intr err reading stat reg 0\n"); 451 return ret; 452 } 453 454 if (st0p) 455 *st0p = st0; 456 457 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 458 /* 459 * There doesn't seem to have been an interrupt. 460 */ 461 return FD_NOT_VALID; 462 } 463 464 if (fd_in(fdc, &cyl) < 0) { 465 return fdc_err(fdc, "can't get cyl num\n"); 466 } 467 468 if (cylp) 469 *cylp = cyl; 470 471 return 0; 472} 473 474 475static int 476fd_read_status(fdc_p fdc) 477{ 478 int i, ret; 479 480 for (i = 0; i < 7; i++) { 481 /* 482 * XXX types are poorly chosen. Only bytes can be read 483 * from the hardware, but fdc->status[] wants u_ints and 484 * fd_in() gives ints. 485 */ 486 int status; 487 488 ret = fd_in(fdc, &status); 489 fdc->status[i] = status; 490 if (ret != 0) 491 break; 492 } 493 494 if (ret == 0) 495 fdc->flags |= FDC_STAT_VALID; 496 else 497 fdc->flags &= ~FDC_STAT_VALID; 498 499 return ret; 500} 501 502/****************************************************************************/ 503/* autoconfiguration stuff */ 504/****************************************************************************/ 505 506static int 507fdc_alloc_resources(struct fdc_data *fdc) 508{ 509 device_t dev; 510 int ispnp, ispcmcia, nports; 511 512 dev = fdc->fdc_dev; 513 ispnp = (fdc->flags & FDC_ISPNP) != 0; 514 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 515 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 516 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 517 518 /* 519 * On standard ISA, we don't just use an 8 port range 520 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 521 * register at 0x3f6. 522 * 523 * Isn't PC hardware wonderful. 524 * 525 * The Y-E Data PCMCIA FDC doesn't have this problem, it 526 * uses the register with offset 6 for pseudo-DMA, and the 527 * one with offset 7 as control register. 528 */ 529 nports = ispcmcia ? 8 : (ispnp ? 1 : 6); 530 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 531 &fdc->rid_ioport, 0ul, ~0ul, 532 nports, RF_ACTIVE); 533 if (fdc->res_ioport == 0) { 534 device_printf(dev, "cannot reserve I/O port range (%d ports)\n", 535 nports); 536 return ENXIO; 537 } 538 fdc->portt = rman_get_bustag(fdc->res_ioport); 539 fdc->porth = rman_get_bushandle(fdc->res_ioport); 540 541 if (!ispcmcia) { 542 /* 543 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 544 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 545 * by checking the size and adjust the port address 546 * accordingly. 547 */ 548 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 549 fdc->port_off = -2; 550 551 /* 552 * Register the control port range as rid 1 if it 553 * isn't there already. Most PnP BIOSen will have 554 * already done this but non-PnP configurations don't. 555 * 556 * And some (!!) report 0x3f2-0x3f5 and completely 557 * leave out the control register! It seems that some 558 * non-antique controller chips have a different 559 * method of programming the transfer speed which 560 * doesn't require the control register, but it's 561 * mighty bogus as the chip still responds to the 562 * address for the control register. 563 */ 564 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 565 u_long ctlstart; 566 567 /* Find the control port, usually 0x3f7 */ 568 ctlstart = rman_get_start(fdc->res_ioport) + 569 fdc->port_off + 7; 570 571 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); 572 } 573 574 /* 575 * Now (finally!) allocate the control port. 576 */ 577 fdc->rid_ctl = 1; 578 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 579 &fdc->rid_ctl, 580 0ul, ~0ul, 1, RF_ACTIVE); 581 if (fdc->res_ctl == 0) { 582 device_printf(dev, 583 "cannot reserve control I/O port range (control port)\n"); 584 return ENXIO; 585 } 586 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 587 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 588 } 589 590 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 591 &fdc->rid_irq, 0ul, ~0ul, 1, 592 RF_ACTIVE); 593 if (fdc->res_irq == 0) { 594 device_printf(dev, "cannot reserve interrupt line\n"); 595 return ENXIO; 596 } 597 598 if ((fdc->flags & FDC_NODMA) == 0) { 599 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 600 &fdc->rid_drq, 0ul, ~0ul, 1, 601 RF_ACTIVE); 602 if (fdc->res_drq == 0) { 603 device_printf(dev, "cannot reserve DMA request line\n"); 604 return ENXIO; 605 } 606 fdc->dmachan = fdc->res_drq->r_start; 607 } 608 609 return 0; 610} 611 612static void 613fdc_release_resources(struct fdc_data *fdc) 614{ 615 device_t dev; 616 617 dev = fdc->fdc_dev; 618 if (fdc->res_irq != 0) { 619 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 620 fdc->res_irq); 621 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 622 fdc->res_irq); 623 } 624 if (fdc->res_ctl != 0) { 625 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 626 fdc->res_ctl); 627 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 628 fdc->res_ctl); 629 } 630 if (fdc->res_ioport != 0) { 631 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 632 fdc->res_ioport); 633 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 634 fdc->res_ioport); 635 } 636 if (fdc->res_drq != 0) { 637 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 638 fdc->res_drq); 639 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 640 fdc->res_drq); 641 } 642} 643 644/****************************************************************************/ 645/* autoconfiguration stuff */ 646/****************************************************************************/ 647 648static struct isa_pnp_id fdc_ids[] = { 649 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 650 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 651 {0} 652}; 653 654static int 655fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 656{ 657 struct fdc_ivars *ivars = device_get_ivars(child); 658 659 switch (which) { 660 case FDC_IVAR_FDUNIT: 661 *result = ivars->fdunit; 662 break; 663 default: 664 return ENOENT; 665 } 666 return 0; 667} 668 669/* 670 * fdc controller section. 671 */ 672static int 673fdc_probe(device_t dev) 674{ 675 int error, ic_type; 676 struct fdc_data *fdc; 677 678 fdc = device_get_softc(dev); 679 bzero(fdc, sizeof *fdc); 680 fdc->fdc_dev = dev; 681 fdc->fdctl_wr = fdctl_wr_isa; 682 683 /* Check pnp ids */ 684 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 685 if (error == ENXIO) 686 return ENXIO; 687 if (error == 0) 688 fdc->flags |= FDC_ISPNP; 689 690 /* Attempt to allocate our resources for the duration of the probe */ 691 error = fdc_alloc_resources(fdc); 692 if (error) 693 goto out; 694 695 /* First - lets reset the floppy controller */ 696 fdout_wr(fdc, 0); 697 DELAY(100); 698 fdout_wr(fdc, FDO_FRST); 699 700 /* see if it can handle a command */ 701 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 702 NE7_SPEC_2(2, 0), 0)) { 703 error = ENXIO; 704 goto out; 705 } 706 707 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 708 ic_type = (u_char)ic_type; 709 switch (ic_type) { 710 case 0x80: 711 device_set_desc(dev, "NEC 765 or clone"); 712 fdc->fdct = FDC_NE765; 713 break; 714 case 0x81: 715 device_set_desc(dev, "Intel 82077 or clone"); 716 fdc->fdct = FDC_I82077; 717 break; 718 case 0x90: 719 device_set_desc(dev, "NEC 72065B or clone"); 720 fdc->fdct = FDC_NE72065; 721 break; 722 default: 723 device_set_desc(dev, "generic floppy controller"); 724 fdc->fdct = FDC_UNKNOWN; 725 break; 726 } 727 } 728 729out: 730 fdc_release_resources(fdc); 731 return (error); 732} 733 734#if NCARD > 0 735 736static int 737fdc_pccard_probe(device_t dev) 738{ 739 int error; 740 struct fdc_data *fdc; 741 742 fdc = device_get_softc(dev); 743 bzero(fdc, sizeof *fdc); 744 fdc->fdc_dev = dev; 745 fdc->fdctl_wr = fdctl_wr_pcmcia; 746 747 fdc->flags |= FDC_ISPCMCIA | FDC_NODMA; 748 749 /* Attempt to allocate our resources for the duration of the probe */ 750 error = fdc_alloc_resources(fdc); 751 if (error) 752 goto out; 753 754 /* First - lets reset the floppy controller */ 755 fdout_wr(fdc, 0); 756 DELAY(100); 757 fdout_wr(fdc, FDO_FRST); 758 759 /* see if it can handle a command */ 760 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 761 NE7_SPEC_2(2, 0), 0)) { 762 error = ENXIO; 763 goto out; 764 } 765 766 device_set_desc(dev, "Y-E Data PCMCIA floppy"); 767 fdc->fdct = FDC_NE765; 768 769out: 770 fdc_release_resources(fdc); 771 return (error); 772} 773 774#endif /* NCARD > 0 */ 775 776static int 777fdc_detach(device_t dev) 778{ 779 struct fdc_data *fdc; 780 int error; 781 782 fdc = device_get_softc(dev); 783 784 /* have our children detached first */ 785 if ((error = bus_generic_detach(dev))) 786 return (error); 787 788 /* reset controller, turn motor off */ 789 fdout_wr(fdc, 0); 790 791 if ((fdc->flags & FDC_NODMA) == 0) 792 isa_dma_release(fdc->dmachan); 793 794 if ((fdc->flags & FDC_ATTACHED) == 0) { 795 device_printf(dev, "already unloaded\n"); 796 return (0); 797 } 798 fdc->flags &= ~FDC_ATTACHED; 799 800 BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq, 801 fdc->fdc_intr); 802 fdc_release_resources(fdc); 803 device_printf(dev, "unload\n"); 804 return (0); 805} 806 807/* 808 * Add a child device to the fdc controller. It will then be probed etc. 809 */ 810static void 811fdc_add_child(device_t dev, const char *name, int unit) 812{ 813 int disabled; 814 struct fdc_ivars *ivar; 815 device_t child; 816 817 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO); 818 if (ivar == NULL) 819 return; 820 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 821 ivar->fdunit = 0; 822 child = device_add_child(dev, name, unit); 823 if (child == NULL) 824 return; 825 device_set_ivars(child, ivar); 826 if (resource_int_value(name, unit, "disabled", &disabled) == 0 827 && disabled != 0) 828 device_disable(child); 829} 830 831static int 832fdc_attach(device_t dev) 833{ 834 struct fdc_data *fdc; 835 int i, error, dunit; 836 const char *name, *dname; 837 838 fdc = device_get_softc(dev); 839 error = fdc_alloc_resources(fdc); 840 if (error) { 841 device_printf(dev, "cannot re-acquire resources\n"); 842 return error; 843 } 844 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 845 INTR_TYPE_BIO | INTR_ENTROPY, fdc_intr, fdc, 846 &fdc->fdc_intr); 847 if (error) { 848 device_printf(dev, "cannot setup interrupt\n"); 849 return error; 850 } 851 fdc->fdcu = device_get_unit(dev); 852 fdc->flags |= FDC_ATTACHED; 853 854 if ((fdc->flags & FDC_NODMA) == 0) { 855 /* 856 * Acquire the DMA channel forever, the driver will do 857 * the rest 858 * XXX should integrate with rman 859 */ 860 isa_dma_acquire(fdc->dmachan); 861 isa_dmainit(fdc->dmachan, MAX_SEC_SIZE); 862 } 863 fdc->state = DEVIDLE; 864 865 /* reset controller, turn motor off, clear fdout mirror reg */ 866 fdout_wr(fdc, fdc->fdout = 0); 867 bioq_init(&fdc->head); 868 869 /* 870 * Probe and attach any children. We should probably detect 871 * devices from the BIOS unless overridden. 872 */ 873 name = device_get_nameunit(dev); 874 i = 0; 875 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) 876 fdc_add_child(dev, dname, dunit); 877 878 return (bus_generic_attach(dev)); 879} 880 881static int 882fdc_print_child(device_t me, device_t child) 883{ 884 int retval = 0; 885 886 retval += bus_print_child_header(me, child); 887 retval += printf(" on %s drive %d\n", device_get_nameunit(me), 888 fdc_get_fdunit(child)); 889 890 return (retval); 891} 892 893static device_method_t fdc_methods[] = { 894 /* Device interface */ 895 DEVMETHOD(device_probe, fdc_probe), 896 DEVMETHOD(device_attach, fdc_attach), 897 DEVMETHOD(device_detach, fdc_detach), 898 DEVMETHOD(device_shutdown, bus_generic_shutdown), 899 DEVMETHOD(device_suspend, bus_generic_suspend), 900 DEVMETHOD(device_resume, bus_generic_resume), 901 902 /* Bus interface */ 903 DEVMETHOD(bus_print_child, fdc_print_child), 904 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 905 /* Our children never use any other bus interface methods. */ 906 907 { 0, 0 } 908}; 909 910static driver_t fdc_driver = { 911 "fdc", 912 fdc_methods, 913 sizeof(struct fdc_data) 914}; 915 916DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 917 918#if NCARD > 0 919 920static device_method_t fdc_pccard_methods[] = { 921 /* Device interface */ 922 DEVMETHOD(device_probe, fdc_pccard_probe), 923 DEVMETHOD(device_attach, fdc_attach), 924 DEVMETHOD(device_detach, fdc_detach), 925 DEVMETHOD(device_shutdown, bus_generic_shutdown), 926 DEVMETHOD(device_suspend, bus_generic_suspend), 927 DEVMETHOD(device_resume, bus_generic_resume), 928 929 /* Bus interface */ 930 DEVMETHOD(bus_print_child, fdc_print_child), 931 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 932 /* Our children never use any other bus interface methods. */ 933 934 { 0, 0 } 935}; 936 937static driver_t fdc_pccard_driver = { 938 "fdc", 939 fdc_pccard_methods, 940 sizeof(struct fdc_data) 941}; 942 943DRIVER_MODULE(fdc, pccard, fdc_pccard_driver, fdc_devclass, 0, 0); 944 945#endif /* NCARD > 0 */ 946 947static struct { 948 char *match; 949 int minor; 950 int link; 951} fd_suffix[] = { 952 { "a", 0, 1 }, 953 { "b", 0, 1 }, 954 { "c", 0, 1 }, 955 { "d", 0, 1 }, 956 { "e", 0, 1 }, 957 { "f", 0, 1 }, 958 { "g", 0, 1 }, 959 { "h", 0, 1 }, 960 { ".1720", 1, 0 }, 961 { ".1480", 2, 0 }, 962 { ".1440", 3, 0 }, 963 { ".1200", 4, 0 }, 964 { ".820", 5, 0 }, 965 { ".800", 6, 0 }, 966 { ".720", 7, 0 }, 967 { ".360", 8, 0 }, 968 { ".640", 9, 0 }, 969 { ".1232", 10, 0 }, 970 { 0, 0 } 971}; 972static void 973fd_clone (void *arg, char *name, int namelen, dev_t *dev) 974{ 975 int u, d, i; 976 char *n; 977 dev_t pdev; 978 979 if (*dev != NODEV) 980 return; 981 if (dev_stdclone(name, &n, "fd", &u) != 2) 982 return; 983 for (i = 0; ; i++) { 984 if (fd_suffix[i].match == NULL) 985 return; 986 if (strcmp(n, fd_suffix[i].match)) 987 continue; 988 d = fd_suffix[i].minor; 989 break; 990 } 991 if (fd_suffix[i].link == 0) { 992 *dev = make_dev(&fd_cdevsw, (u << 6) + d, 993 UID_ROOT, GID_OPERATOR, 0640, name); 994 } else { 995 pdev = makedev(fd_cdevsw.d_maj, (u << 6) + d); 996 *dev = make_dev_alias(pdev, name); 997 } 998} 999 1000/******************************************************************/ 1001/* 1002 * devices attached to the controller section. 1003 */ 1004static int 1005fd_probe(device_t dev) 1006{ 1007 int i; 1008 u_int fdt, st0, st3; 1009 struct fd_data *fd; 1010 struct fdc_data *fdc; 1011 fdsu_t fdsu; 1012 static int fd_fifo = 0; 1013 1014 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 1015 fd = device_get_softc(dev); 1016 fdc = device_get_softc(device_get_parent(dev)); 1017 1018 bzero(fd, sizeof *fd); 1019 fd->dev = dev; 1020 fd->fdc = fdc; 1021 fd->fdsu = fdsu; 1022 fd->fdu = device_get_unit(dev); 1023 1024#ifdef __i386__ 1025 /* look up what bios thinks we have */ 1026 switch (fd->fdu) { 1027 case 0: 1028 if ((fdc->flags & FDC_ISPCMCIA)) 1029 fdt = RTCFDT_144M; 1030 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0) 1031 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED; 1032 else 1033 fdt = (rtcin(RTC_FDISKETTE) & 0xf0); 1034 break; 1035 case 1: 1036 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0); 1037 break; 1038 default: 1039 fdt = RTCFDT_NONE; 1040 break; 1041 } 1042#else 1043 fdt = RTCFDT_144M; /* XXX probably */ 1044#endif 1045 1046 /* is there a unit? */ 1047 if (fdt == RTCFDT_NONE) 1048 return (ENXIO); 1049 1050 /* select it */ 1051 set_motor(fdc, fdsu, TURNON); 1052 DELAY(1000000); /* 1 sec */ 1053 1054 /* XXX This doesn't work before the first set_motor() */ 1055 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN 1056 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 1057 && enable_fifo(fdc) == 0) { 1058 device_printf(device_get_parent(dev), 1059 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 1060 } 1061 fd_fifo = 1; 1062 1063 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) 1064 && (st3 & NE7_ST3_T0)) { 1065 /* if at track 0, first seek inwards */ 1066 /* seek some steps: */ 1067 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0); 1068 DELAY(300000); /* ...wait a moment... */ 1069 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */ 1070 } 1071 1072 /* If we're at track 0 first seek inwards. */ 1073 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) { 1074 /* Seek some steps... */ 1075 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 1076 /* ...wait a moment... */ 1077 DELAY(300000); 1078 /* make ctrlr happy: */ 1079 fd_sense_int(fdc, 0, 0); 1080 } 1081 } 1082 1083 for (i = 0; i < 2; i++) { 1084 /* 1085 * we must recalibrate twice, just in case the 1086 * heads have been beyond cylinder 76, since most 1087 * FDCs still barf when attempting to recalibrate 1088 * more than 77 steps 1089 */ 1090 /* go back to 0: */ 1091 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 1092 /* a second being enough for full stroke seek*/ 1093 DELAY(i == 0 ? 1000000 : 300000); 1094 1095 /* anything responding? */ 1096 if (fd_sense_int(fdc, &st0, 0) == 0 && 1097 (st0 & NE7_ST0_EC) == 0) 1098 break; /* already probed succesfully */ 1099 } 1100 } 1101 1102 set_motor(fdc, fdsu, TURNOFF); 1103 1104 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */ 1105 return (ENXIO); 1106 1107 fd->track = FD_NO_TRACK; 1108 fd->fdc = fdc; 1109 fd->fdsu = fdsu; 1110 fd->options = 0; 1111 callout_handle_init(&fd->toffhandle); 1112 callout_handle_init(&fd->tohandle); 1113 1114 switch (fdt) { 1115 case RTCFDT_12M: 1116 device_set_desc(dev, "1200-KB 5.25\" drive"); 1117 fd->type = FD_1200; 1118 break; 1119 case RTCFDT_144M | RTCFDT_144M_PRETENDED: 1120 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive"); 1121 fdt = RTCFDT_144M; 1122 fd->type = FD_1440; 1123 case RTCFDT_144M: 1124 device_set_desc(dev, "1440-KB 3.5\" drive"); 1125 fd->type = FD_1440; 1126 break; 1127 case RTCFDT_288M: 1128 case RTCFDT_288M_1: 1129 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 1130 fd->type = FD_1440; 1131 break; 1132 case RTCFDT_360K: 1133 device_set_desc(dev, "360-KB 5.25\" drive"); 1134 fd->type = FD_360; 1135 break; 1136 case RTCFDT_720K: 1137 printf("720-KB 3.5\" drive"); 1138 fd->type = FD_720; 1139 break; 1140 default: 1141 return (ENXIO); 1142 } 1143 return (0); 1144} 1145 1146static int 1147fd_attach(device_t dev) 1148{ 1149 struct fd_data *fd; 1150 static int cdevsw_add_done; 1151 1152 if (!cdevsw_add_done) { 1153 cdevsw_add(&fd_cdevsw); /* XXX */ 1154 cdevsw_add_done = 1; 1155 } 1156 fd = device_get_softc(dev); 1157 fd->clonetag = EVENTHANDLER_REGISTER(dev_clone, fd_clone, 0, 1000); 1158 fd->masterdev = make_dev(&fd_cdevsw, fd->fdu << 6, 1159 UID_ROOT, GID_OPERATOR, 0640, "fd%d", fd->fdu); 1160 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1161 device_get_unit(dev), 0, DEVSTAT_NO_ORDERED_TAGS, 1162 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1163 DEVSTAT_PRIORITY_FD); 1164 return (0); 1165} 1166 1167static int 1168fd_detach(device_t dev) 1169{ 1170 struct fd_data *fd; 1171 1172 fd = device_get_softc(dev); 1173 devstat_remove_entry(&fd->device_stats); 1174 destroy_dev(fd->masterdev); 1175 cdevsw_remove(&fd_cdevsw); 1176 /* XXX need to destroy cloned devs as well */ 1177 EVENTHANDLER_DEREGISTER(dev_clone, fd->clonetag); 1178 untimeout(fd_turnoff, fd, fd->toffhandle); 1179 1180 return (0); 1181} 1182 1183static device_method_t fd_methods[] = { 1184 /* Device interface */ 1185 DEVMETHOD(device_probe, fd_probe), 1186 DEVMETHOD(device_attach, fd_attach), 1187 DEVMETHOD(device_detach, fd_detach), 1188 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1189 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1190 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1191 1192 { 0, 0 } 1193}; 1194 1195static driver_t fd_driver = { 1196 "fd", 1197 fd_methods, 1198 sizeof(struct fd_data) 1199}; 1200 1201DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1202 1203/****************************************************************************/ 1204/* motor control stuff */ 1205/* remember to not deselect the drive we're working on */ 1206/****************************************************************************/ 1207static void 1208set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1209{ 1210 int fdout = fdc->fdout; 1211 int needspecify = 0; 1212 1213 if(turnon) { 1214 fdout &= ~FDO_FDSEL; 1215 fdout |= (FDO_MOEN0 << fdsu) + fdsu; 1216 } else 1217 fdout &= ~(FDO_MOEN0 << fdsu); 1218 1219 if(!turnon 1220 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0) 1221 /* gonna turn off the last drive, put FDC to bed */ 1222 fdout &= ~ (FDO_FRST|FDO_FDMAEN); 1223 else { 1224 /* make sure controller is selected and specified */ 1225 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0) 1226 needspecify = 1; 1227 fdout |= (FDO_FRST|FDO_FDMAEN); 1228 } 1229 1230 fdout_wr(fdc, fdout); 1231 fdc->fdout = fdout; 1232 TRACE1("[0x%x->FDOUT]", fdout); 1233 1234 if (needspecify) { 1235 /* 1236 * we silently assume the command will be accepted 1237 * after an FDC reset 1238 * 1239 * Steinbach's Guideline for Systems Programming: 1240 * Never test for an error condition you don't know 1241 * how to handle. 1242 */ 1243 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1244 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1245 0); 1246 if (fdc->flags & FDC_HAS_FIFO) 1247 (void) enable_fifo(fdc); 1248 } 1249} 1250 1251static void 1252fd_turnoff(void *xfd) 1253{ 1254 int s; 1255 fd_p fd = xfd; 1256 1257 TRACE1("[fd%d: turnoff]", fd->fdu); 1258 1259 s = splbio(); 1260 /* 1261 * Don't turn off the motor yet if the drive is active. 1262 * 1263 * If we got here, this could only mean we missed an interrupt. 1264 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1265 * after a controller reset. Just schedule a pseudo-interrupt 1266 * so the state machine gets re-entered. 1267 */ 1268 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1269 fdc_intr(fd->fdc); 1270 splx(s); 1271 return; 1272 } 1273 1274 fd->flags &= ~FD_MOTOR; 1275 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1276 splx(s); 1277} 1278 1279static void 1280fd_motor_on(void *xfd) 1281{ 1282 int s; 1283 fd_p fd = xfd; 1284 1285 s = splbio(); 1286 fd->flags &= ~FD_MOTOR_WAIT; 1287 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1288 { 1289 fdc_intr(fd->fdc); 1290 } 1291 splx(s); 1292} 1293 1294static void 1295fd_turnon(fd_p fd) 1296{ 1297 if(!(fd->flags & FD_MOTOR)) 1298 { 1299 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1300 set_motor(fd->fdc, fd->fdsu, TURNON); 1301 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */ 1302 } 1303} 1304 1305static void 1306fdc_reset(fdc_p fdc) 1307{ 1308 /* Try a reset, keep motor on */ 1309 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1310 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1311 DELAY(100); 1312 /* enable FDC, but defer interrupts a moment */ 1313 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1314 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1315 DELAY(100); 1316 fdout_wr(fdc, fdc->fdout); 1317 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1318 1319 /* XXX after a reset, silently believe the FDC will accept commands */ 1320 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1321 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1322 0); 1323 if (fdc->flags & FDC_HAS_FIFO) 1324 (void) enable_fifo(fdc); 1325} 1326 1327/****************************************************************************/ 1328/* fdc in/out */ 1329/****************************************************************************/ 1330static int 1331fd_in(struct fdc_data *fdc, int *ptr) 1332{ 1333 int i, j = 100000; 1334 while ((i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) 1335 != (NE7_DIO|NE7_RQM) && j-- > 0) 1336 if (i == NE7_RQM) 1337 return fdc_err(fdc, "ready for output in input\n"); 1338 if (j <= 0) 1339 return fdc_err(fdc, bootverbose? "input ready timeout\n": 0); 1340#ifdef FDC_DEBUG 1341 i = fddata_rd(fdc); 1342 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1343 *ptr = i; 1344 return 0; 1345#else /* !FDC_DEBUG */ 1346 i = fddata_rd(fdc); 1347 if (ptr) 1348 *ptr = i; 1349 return 0; 1350#endif /* FDC_DEBUG */ 1351} 1352 1353int 1354out_fdc(struct fdc_data *fdc, int x) 1355{ 1356 int i; 1357 1358 /* Check that the direction bit is set */ 1359 i = 100000; 1360 while ((fdsts_rd(fdc) & NE7_DIO) && i-- > 0); 1361 if (i <= 0) return fdc_err(fdc, "direction bit not set\n"); 1362 1363 /* Check that the floppy controller is ready for a command */ 1364 i = 100000; 1365 while ((fdsts_rd(fdc) & NE7_RQM) == 0 && i-- > 0); 1366 if (i <= 0) 1367 return fdc_err(fdc, bootverbose? "output ready timeout\n": 0); 1368 1369 /* Send the command and return */ 1370 fddata_wr(fdc, x); 1371 TRACE1("[0x%x->FDDATA]", x); 1372 return (0); 1373} 1374 1375/****************************************************************************/ 1376/* fdopen/fdclose */ 1377/****************************************************************************/ 1378int 1379Fdopen(dev_t dev, int flags, int mode, struct proc *p) 1380{ 1381 fdu_t fdu = FDUNIT(minor(dev)); 1382 int type = FDTYPE(minor(dev)); 1383 fd_p fd; 1384 fdc_p fdc; 1385 1386 /* check bounds */ 1387 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1388 return (ENXIO); 1389 fdc = fd->fdc; 1390 if ((fdc == NULL) || (fd->type == NO_TYPE)) 1391 return (ENXIO); 1392 if (type > NUMDENS) 1393 return (ENXIO); 1394 if (type == 0) 1395 type = fd->type; 1396 else { 1397 /* 1398 * For each type of basic drive, make sure we are trying 1399 * to open a type it can do, 1400 */ 1401 if (type != fd->type) { 1402 switch (fd->type) { 1403 case FD_360: 1404 return (ENXIO); 1405 case FD_720: 1406 if ( type != FD_820 1407 && type != FD_800 1408 && type != FD_640 1409 ) 1410 return (ENXIO); 1411 break; 1412 case FD_1200: 1413 switch (type) { 1414 case FD_1480: 1415 type = FD_1480in5_25; 1416 break; 1417 case FD_1440: 1418 type = FD_1440in5_25; 1419 break; 1420 case FD_1232: 1421 break; 1422 case FD_820: 1423 type = FD_820in5_25; 1424 break; 1425 case FD_800: 1426 type = FD_800in5_25; 1427 break; 1428 case FD_720: 1429 type = FD_720in5_25; 1430 break; 1431 case FD_640: 1432 type = FD_640in5_25; 1433 break; 1434 case FD_360: 1435 type = FD_360in5_25; 1436 break; 1437 default: 1438 return(ENXIO); 1439 } 1440 break; 1441 case FD_1440: 1442 if ( type != FD_1720 1443 && type != FD_1480 1444 && type != FD_1200 1445 && type != FD_820 1446 && type != FD_800 1447 && type != FD_720 1448 && type != FD_640 1449 ) 1450 return(ENXIO); 1451 break; 1452 } 1453 } 1454 } 1455 fd->ft = fd_types + type - 1; 1456 fd->flags |= FD_OPEN; 1457 1458 return 0; 1459} 1460 1461int 1462fdclose(dev_t dev, int flags, int mode, struct proc *p) 1463{ 1464 fdu_t fdu = FDUNIT(minor(dev)); 1465 struct fd_data *fd; 1466 1467 fd = devclass_get_softc(fd_devclass, fdu); 1468 fd->flags &= ~FD_OPEN; 1469 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR); 1470 1471 return (0); 1472} 1473 1474/****************************************************************************/ 1475/* fdstrategy */ 1476/****************************************************************************/ 1477void 1478fdstrategy(struct bio *bp) 1479{ 1480 unsigned nblocks, blknum, cando; 1481 int s; 1482 fdu_t fdu; 1483 fdc_p fdc; 1484 fd_p fd; 1485 size_t fdblk; 1486 1487 fdu = FDUNIT(minor(bp->bio_dev)); 1488 fd = devclass_get_softc(fd_devclass, fdu); 1489 if (fd == 0) 1490 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1491 (u_long)major(bp->bio_dev), (u_long)minor(bp->bio_dev)); 1492 fdc = fd->fdc; 1493 if (fd->type == NO_TYPE) { 1494 bp->bio_error = ENXIO; 1495 bp->bio_flags |= BIO_ERROR; 1496 goto bad; 1497 } 1498 fdblk = 128 << (fd->ft->secsize); 1499 if (bp->bio_cmd != BIO_FORMAT && bp->bio_cmd != BIO_RDSECTID) { 1500 if (bp->bio_blkno < 0) { 1501 printf( 1502 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n", 1503 fdu, (u_long)bp->bio_blkno, bp->bio_bcount); 1504 bp->bio_error = EINVAL; 1505 bp->bio_flags |= BIO_ERROR; 1506 goto bad; 1507 } 1508 if ((bp->bio_bcount % fdblk) != 0) { 1509 bp->bio_error = EINVAL; 1510 bp->bio_flags |= BIO_ERROR; 1511 goto bad; 1512 } 1513 } 1514 1515 /* 1516 * Set up block calculations. 1517 */ 1518 if (bp->bio_blkno > 20000000) { 1519 /* 1520 * Reject unreasonably high block number, prevent the 1521 * multiplication below from overflowing. 1522 */ 1523 bp->bio_error = EINVAL; 1524 bp->bio_flags |= BIO_ERROR; 1525 goto bad; 1526 } 1527 blknum = (unsigned) bp->bio_blkno * DEV_BSIZE/fdblk; 1528 nblocks = fd->ft->size; 1529 bp->bio_resid = 0; 1530 if (blknum + (bp->bio_bcount / fdblk) > nblocks) { 1531 if (blknum <= nblocks) { 1532 cando = (nblocks - blknum) * fdblk; 1533 bp->bio_resid = bp->bio_bcount - cando; 1534 if (cando == 0) 1535 goto bad; /* not actually bad but EOF */ 1536 } else { 1537 bp->bio_error = EINVAL; 1538 bp->bio_flags |= BIO_ERROR; 1539 goto bad; 1540 } 1541 } 1542 bp->bio_pblkno = bp->bio_blkno; 1543 s = splbio(); 1544 bioqdisksort(&fdc->head, bp); 1545 untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */ 1546 devstat_start_transaction(&fd->device_stats); 1547 device_busy(fd->dev); 1548 fdstart(fdc); 1549 splx(s); 1550 return; 1551 1552bad: 1553 biodone(bp); 1554} 1555 1556/***************************************************************\ 1557* fdstart * 1558* We have just queued something.. if the controller is not busy * 1559* then simulate the case where it has just finished a command * 1560* So that it (the interrupt routine) looks on the queue for more* 1561* work to do and picks up what we just added. * 1562* If the controller is already busy, we need do nothing, as it * 1563* will pick up our work when the present work completes * 1564\***************************************************************/ 1565static void 1566fdstart(struct fdc_data *fdc) 1567{ 1568 int s; 1569 1570 s = splbio(); 1571 if(fdc->state == DEVIDLE) 1572 { 1573 fdc_intr(fdc); 1574 } 1575 splx(s); 1576} 1577 1578static void 1579fd_iotimeout(void *xfdc) 1580{ 1581 fdc_p fdc; 1582 int s; 1583 1584 fdc = xfdc; 1585 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1586 1587 /* 1588 * Due to IBM's brain-dead design, the FDC has a faked ready 1589 * signal, hardwired to ready == true. Thus, any command 1590 * issued if there's no diskette in the drive will _never_ 1591 * complete, and must be aborted by resetting the FDC. 1592 * Many thanks, Big Blue! 1593 * The FDC must not be reset directly, since that would 1594 * interfere with the state machine. Instead, pretend that 1595 * the command completed but was invalid. The state machine 1596 * will reset the FDC and retry once. 1597 */ 1598 s = splbio(); 1599 fdc->status[0] = NE7_ST0_IC_IV; 1600 fdc->flags &= ~FDC_STAT_VALID; 1601 fdc->state = IOTIMEDOUT; 1602 fdc_intr(fdc); 1603 splx(s); 1604} 1605 1606/* just ensure it has the right spl */ 1607static void 1608fd_pseudointr(void *xfdc) 1609{ 1610 int s; 1611 1612 s = splbio(); 1613 fdc_intr(xfdc); 1614 splx(s); 1615} 1616 1617/***********************************************************************\ 1618* fdc_intr * 1619* keep calling the state machine until it returns a 0 * 1620* ALWAYS called at SPLBIO * 1621\***********************************************************************/ 1622static void 1623fdc_intr(void *xfdc) 1624{ 1625 fdc_p fdc = xfdc; 1626 while(fdstate(fdc)) 1627 ; 1628} 1629 1630/* 1631 * magic pseudo-DMA initialization for YE FDC. Sets count and 1632 * direction 1633 */ 1634#define SET_BCDR(fdc,wr,cnt,port) \ 1635 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1636 ((cnt)-1) & 0xff); \ 1637 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1638 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1639 1640/* 1641 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy 1642 */ 1643static int 1644fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count) 1645{ 1646 u_char *cptr = (u_char *)addr; 1647 1648 if (flags == BIO_READ) { 1649 if (fdc->state != PIOREAD) { 1650 fdc->state = PIOREAD; 1651 return(0); 1652 } 1653 SET_BCDR(fdc, 0, count, 0); 1654 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1655 FDC_YE_DATAPORT, cptr, count); 1656 } else { 1657 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1658 FDC_YE_DATAPORT, cptr, count); 1659 SET_BCDR(fdc, 0, count, 0); 1660 } 1661 return(1); 1662} 1663 1664/***********************************************************************\ 1665* The controller state machine. * 1666* if it returns a non zero value, it should be called again immediatly * 1667\***********************************************************************/ 1668static int 1669fdstate(fdc_p fdc) 1670{ 1671 int read, format, rdsectid, head, i, sec = 0, sectrac, st0, cyl, st3, idf; 1672 unsigned blknum = 0, b_cylinder = 0; 1673 struct fdc_readid *idp; 1674 fdu_t fdu = fdc->fdu; 1675 fd_p fd; 1676 register struct bio *bp; 1677 struct fd_formb *finfo = NULL; 1678 size_t fdblk; 1679 1680 bp = fdc->bp; 1681 if (bp == NULL) { 1682 bp = bioq_first(&fdc->head); 1683 if (bp != NULL) { 1684 bioq_remove(&fdc->head, bp); 1685 fdc->bp = bp; 1686 } 1687 } 1688 if (bp == NULL) { 1689 /***********************************************\ 1690 * nothing left for this controller to do * 1691 * Force into the IDLE state, * 1692 \***********************************************/ 1693 fdc->state = DEVIDLE; 1694 if (fdc->fd) { 1695 device_printf(fdc->fdc_dev, 1696 "unexpected valid fd pointer\n"); 1697 fdc->fd = (fd_p) 0; 1698 fdc->fdu = -1; 1699 } 1700 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1701 return (0); 1702 } 1703 fdu = FDUNIT(minor(bp->bio_dev)); 1704 fd = devclass_get_softc(fd_devclass, fdu); 1705 fdblk = 128 << fd->ft->secsize; 1706 if (fdc->fd && (fd != fdc->fd)) 1707 device_printf(fd->dev, "confused fd pointers\n"); 1708 read = bp->bio_cmd == BIO_READ; 1709 if (read) 1710 idf = ISADMA_READ; 1711 else 1712 idf = ISADMA_WRITE; 1713 format = bp->bio_cmd == BIO_FORMAT; 1714 rdsectid = bp->bio_cmd == BIO_RDSECTID; 1715 if (format) { 1716 finfo = (struct fd_formb *)bp->bio_data; 1717 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 1718 - (char *)finfo; 1719 } 1720 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) { 1721 blknum = (unsigned) bp->bio_pblkno * DEV_BSIZE/fdblk + 1722 fd->skip/fdblk; 1723 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 1724 } 1725 TRACE1("fd%d", fdu); 1726 TRACE1("[%s]", fdstates[fdc->state]); 1727 TRACE1("(0x%x)", fd->flags); 1728 untimeout(fd_turnoff, fd, fd->toffhandle); 1729 fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz); 1730 switch (fdc->state) 1731 { 1732 case DEVIDLE: 1733 case FINDWORK: /* we have found new work */ 1734 fdc->retry = 0; 1735 fd->skip = 0; 1736 fdc->fd = fd; 1737 fdc->fdu = fdu; 1738 fdc->fdctl_wr(fdc, fd->ft->trans); 1739 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 1740 /*******************************************************\ 1741 * If the next drive has a motor startup pending, then * 1742 * it will start up in its own good time * 1743 \*******************************************************/ 1744 if(fd->flags & FD_MOTOR_WAIT) { 1745 fdc->state = MOTORWAIT; 1746 return (0); /* come back later */ 1747 } 1748 /*******************************************************\ 1749 * Maybe if it's not starting, it SHOULD be starting * 1750 \*******************************************************/ 1751 if (!(fd->flags & FD_MOTOR)) 1752 { 1753 fdc->state = MOTORWAIT; 1754 fd_turnon(fd); 1755 return (0); 1756 } 1757 else /* at least make sure we are selected */ 1758 { 1759 set_motor(fdc, fd->fdsu, TURNON); 1760 } 1761 if (fdc->flags & FDC_NEEDS_RESET) { 1762 fdc->state = RESETCTLR; 1763 fdc->flags &= ~FDC_NEEDS_RESET; 1764 } else 1765 fdc->state = DOSEEK; 1766 break; 1767 case DOSEEK: 1768 if (b_cylinder == (unsigned)fd->track) 1769 { 1770 fdc->state = SEEKCOMPLETE; 1771 break; 1772 } 1773 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 1774 fd->fdsu, b_cylinder * fd->ft->steptrac, 1775 0)) 1776 { 1777 /* 1778 * seek command not accepted, looks like 1779 * the FDC went off to the Saints... 1780 */ 1781 fdc->retry = 6; /* try a reset */ 1782 return(retrier(fdc)); 1783 } 1784 fd->track = FD_NO_TRACK; 1785 fdc->state = SEEKWAIT; 1786 return(0); /* will return later */ 1787 case SEEKWAIT: 1788 /* allow heads to settle */ 1789 timeout(fd_pseudointr, fdc, hz / 16); 1790 fdc->state = SEEKCOMPLETE; 1791 return(0); /* will return later */ 1792 case SEEKCOMPLETE : /* SEEK DONE, START DMA */ 1793 /* Make sure seek really happened*/ 1794 if(fd->track == FD_NO_TRACK) { 1795 int descyl = b_cylinder * fd->ft->steptrac; 1796 do { 1797 /* 1798 * This might be a "ready changed" interrupt, 1799 * which cannot really happen since the 1800 * RDY pin is hardwired to + 5 volts. This 1801 * generally indicates a "bouncing" intr 1802 * line, so do one of the following: 1803 * 1804 * When running on an enhanced FDC that is 1805 * known to not go stuck after responding 1806 * with INVALID, fetch all interrupt states 1807 * until seeing either an INVALID or a 1808 * real interrupt condition. 1809 * 1810 * When running on a dumb old NE765, give 1811 * up immediately. The controller will 1812 * provide up to four dummy RC interrupt 1813 * conditions right after reset (for the 1814 * corresponding four drives), so this is 1815 * our only chance to get notice that it 1816 * was not the FDC that caused the interrupt. 1817 */ 1818 if (fd_sense_int(fdc, &st0, &cyl) 1819 == FD_NOT_VALID) 1820 return 0; 1821 if(fdc->fdct == FDC_NE765 1822 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1823 return 0; /* hope for a real intr */ 1824 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1825 1826 if (0 == descyl) { 1827 int failed = 0; 1828 /* 1829 * seek to cyl 0 requested; make sure we are 1830 * really there 1831 */ 1832 if (fd_sense_drive_status(fdc, &st3)) 1833 failed = 1; 1834 if ((st3 & NE7_ST3_T0) == 0) { 1835 printf( 1836 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 1837 fdu, st3, NE7_ST3BITS); 1838 failed = 1; 1839 } 1840 1841 if (failed) { 1842 if(fdc->retry < 3) 1843 fdc->retry = 3; 1844 return (retrier(fdc)); 1845 } 1846 } 1847 1848 if (cyl != descyl) { 1849 printf( 1850 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 1851 fdu, descyl, cyl, st0); 1852 if (fdc->retry < 3) 1853 fdc->retry = 3; 1854 return (retrier(fdc)); 1855 } 1856 } 1857 1858 fd->track = b_cylinder; 1859 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 1860 isa_dmastart(idf, bp->bio_data+fd->skip, 1861 format ? bp->bio_bcount : fdblk, fdc->dmachan); 1862 sectrac = fd->ft->sectrac; 1863 sec = blknum % (sectrac * fd->ft->heads); 1864 head = sec / sectrac; 1865 sec = sec % sectrac + 1; 1866 fd->hddrv = ((head&1)<<2)+fdu; 1867 1868 if(format || !(read || rdsectid)) 1869 { 1870 /* make sure the drive is writable */ 1871 if(fd_sense_drive_status(fdc, &st3) != 0) 1872 { 1873 /* stuck controller? */ 1874 if (!(fdc->flags & FDC_NODMA)) 1875 isa_dmadone(idf, 1876 bp->bio_data + fd->skip, 1877 format ? bp->bio_bcount : fdblk, 1878 fdc->dmachan); 1879 fdc->retry = 6; /* reset the beast */ 1880 return (retrier(fdc)); 1881 } 1882 if(st3 & NE7_ST3_WP) 1883 { 1884 /* 1885 * XXX YES! this is ugly. 1886 * in order to force the current operation 1887 * to fail, we will have to fake an FDC 1888 * error - all error handling is done 1889 * by the retrier() 1890 */ 1891 fdc->status[0] = NE7_ST0_IC_AT; 1892 fdc->status[1] = NE7_ST1_NW; 1893 fdc->status[2] = 0; 1894 fdc->status[3] = fd->track; 1895 fdc->status[4] = head; 1896 fdc->status[5] = sec; 1897 fdc->retry = 8; /* break out immediately */ 1898 fdc->state = IOTIMEDOUT; /* not really... */ 1899 return (1); 1900 } 1901 } 1902 1903 if (format) { 1904 if (fdc->flags & FDC_NODMA) { 1905 /* 1906 * This seems to be necessary for 1907 * whatever obscure reason; if we omit 1908 * it, we end up filling the sector ID 1909 * fields of the newly formatted track 1910 * entirely with garbage, causing 1911 * `wrong cylinder' errors all over 1912 * the place when trying to read them 1913 * back. 1914 * 1915 * Umpf. 1916 */ 1917 SET_BCDR(fdc, 1, bp->bio_bcount, 0); 1918 1919 (void)fdcpio(fdc,bp->bio_cmd, 1920 bp->bio_data+fd->skip, 1921 bp->bio_bcount); 1922 1923 } 1924 /* formatting */ 1925 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu, 1926 finfo->fd_formb_secshift, 1927 finfo->fd_formb_nsecs, 1928 finfo->fd_formb_gaplen, 1929 finfo->fd_formb_fillbyte, 0)) { 1930 /* controller fell over */ 1931 if (!(fdc->flags & FDC_NODMA)) 1932 isa_dmadone(idf, 1933 bp->bio_data + fd->skip, 1934 format ? bp->bio_bcount : fdblk, 1935 fdc->dmachan); 1936 fdc->retry = 6; 1937 return (retrier(fdc)); 1938 } 1939 } else if (rdsectid) { 1940 if (fd_cmd(fdc, 2, NE7CMD_READID, head << 2 | fdu, 0)) { 1941 /* controller jamming */ 1942 fdc->retry = 6; 1943 return (retrier(fdc)); 1944 } 1945 } else { 1946 /* read or write operation */ 1947 if (fdc->flags & FDC_NODMA) { 1948 /* 1949 * this seems to be necessary even when 1950 * reading data 1951 */ 1952 SET_BCDR(fdc, 1, fdblk, 0); 1953 1954 /* 1955 * perform the write pseudo-DMA before 1956 * the WRITE command is sent 1957 */ 1958 if (!read) 1959 (void)fdcpio(fdc,bp->bio_cmd, 1960 bp->bio_data+fd->skip, 1961 fdblk); 1962 } 1963 if (fd_cmd(fdc, 9, 1964 (read ? NE7CMD_READ : NE7CMD_WRITE), 1965 head << 2 | fdu, /* head & unit */ 1966 fd->track, /* track */ 1967 head, 1968 sec, /* sector + 1 */ 1969 fd->ft->secsize, /* sector size */ 1970 sectrac, /* sectors/track */ 1971 fd->ft->gap, /* gap size */ 1972 fd->ft->datalen, /* data length */ 1973 0)) { 1974 /* the beast is sleeping again */ 1975 if (!(fdc->flags & FDC_NODMA)) 1976 isa_dmadone(idf, 1977 bp->bio_data + fd->skip, 1978 format ? bp->bio_bcount : fdblk, 1979 fdc->dmachan); 1980 fdc->retry = 6; 1981 return (retrier(fdc)); 1982 } 1983 } 1984 if (!rdsectid && (fdc->flags & FDC_NODMA)) 1985 /* 1986 * if this is a read, then simply await interrupt 1987 * before performing PIO 1988 */ 1989 if (read && !fdcpio(fdc,bp->bio_cmd, 1990 bp->bio_data+fd->skip,fdblk)) { 1991 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 1992 return(0); /* will return later */ 1993 } 1994 1995 /* 1996 * write (or format) operation will fall through and 1997 * await completion interrupt 1998 */ 1999 fdc->state = IOCOMPLETE; 2000 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2001 return (0); /* will return later */ 2002 case PIOREAD: 2003 /* 2004 * actually perform the PIO read. The IOCOMPLETE case 2005 * removes the timeout for us. 2006 */ 2007 (void)fdcpio(fdc,bp->bio_cmd,bp->bio_data+fd->skip,fdblk); 2008 fdc->state = IOCOMPLETE; 2009 /* FALLTHROUGH */ 2010 case IOCOMPLETE: /* IO DONE, post-analyze */ 2011 untimeout(fd_iotimeout, fdc, fd->tohandle); 2012 2013 if (fd_read_status(fdc)) { 2014 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2015 isa_dmadone(idf, bp->bio_data + fd->skip, 2016 format ? bp->bio_bcount : fdblk, 2017 fdc->dmachan); 2018 if (fdc->retry < 6) 2019 fdc->retry = 6; /* force a reset */ 2020 return (retrier(fdc)); 2021 } 2022 2023 fdc->state = IOTIMEDOUT; 2024 2025 /* FALLTHROUGH */ 2026 2027 case IOTIMEDOUT: 2028 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2029 isa_dmadone(idf, bp->bio_data + fd->skip, 2030 format ? bp->bio_bcount : fdblk, fdc->dmachan); 2031 if (fdc->status[0] & NE7_ST0_IC) { 2032 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2033 && fdc->status[1] & NE7_ST1_OR) { 2034 /* 2035 * DMA overrun. Someone hogged the bus 2036 * and didn't release it in time for the 2037 * next FDC transfer. 2038 * Just restart it, don't increment retry 2039 * count. (vak) 2040 */ 2041 fdc->state = SEEKCOMPLETE; 2042 return (1); 2043 } 2044 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 2045 && fdc->retry < 6) 2046 fdc->retry = 6; /* force a reset */ 2047 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2048 && fdc->status[2] & NE7_ST2_WC 2049 && fdc->retry < 3) 2050 fdc->retry = 3; /* force recalibrate */ 2051 return (retrier(fdc)); 2052 } 2053 /* All OK */ 2054 if (rdsectid) { 2055 /* copy out ID field contents */ 2056 idp = (struct fdc_readid *)bp->bio_data; 2057 idp->cyl = fdc->status[3]; 2058 idp->head = fdc->status[4]; 2059 idp->sec = fdc->status[5]; 2060 idp->secshift = fdc->status[6]; 2061 } 2062 fd->skip += fdblk; 2063 if (!rdsectid && !format && fd->skip < bp->bio_bcount - bp->bio_resid) { 2064 /* set up next transfer */ 2065 fdc->state = DOSEEK; 2066 } else { 2067 /* ALL DONE */ 2068 fd->skip = 0; 2069 fdc->bp = NULL; 2070 device_unbusy(fd->dev); 2071 biofinish(bp, &fd->device_stats, 0); 2072 fdc->fd = (fd_p) 0; 2073 fdc->fdu = -1; 2074 fdc->state = FINDWORK; 2075 } 2076 return (1); 2077 case RESETCTLR: 2078 fdc_reset(fdc); 2079 fdc->retry++; 2080 fdc->state = RESETCOMPLETE; 2081 return (0); 2082 case RESETCOMPLETE: 2083 /* 2084 * Discard all the results from the reset so that they 2085 * can't cause an unexpected interrupt later. 2086 */ 2087 for (i = 0; i < 4; i++) 2088 (void)fd_sense_int(fdc, &st0, &cyl); 2089 fdc->state = STARTRECAL; 2090 /* Fall through. */ 2091 case STARTRECAL: 2092 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 2093 /* arrgl */ 2094 fdc->retry = 6; 2095 return (retrier(fdc)); 2096 } 2097 fdc->state = RECALWAIT; 2098 return (0); /* will return later */ 2099 case RECALWAIT: 2100 /* allow heads to settle */ 2101 timeout(fd_pseudointr, fdc, hz / 8); 2102 fdc->state = RECALCOMPLETE; 2103 return (0); /* will return later */ 2104 case RECALCOMPLETE: 2105 do { 2106 /* 2107 * See SEEKCOMPLETE for a comment on this: 2108 */ 2109 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2110 return 0; 2111 if(fdc->fdct == FDC_NE765 2112 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2113 return 0; /* hope for a real intr */ 2114 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2115 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2116 { 2117 if(fdc->retry > 3) 2118 /* 2119 * a recalibrate from beyond cylinder 77 2120 * will "fail" due to the FDC limitations; 2121 * since people used to complain much about 2122 * the failure message, try not logging 2123 * this one if it seems to be the first 2124 * time in a line 2125 */ 2126 printf("fd%d: recal failed ST0 %b cyl %d\n", 2127 fdu, st0, NE7_ST0BITS, cyl); 2128 if(fdc->retry < 3) fdc->retry = 3; 2129 return (retrier(fdc)); 2130 } 2131 fd->track = 0; 2132 /* Seek (probably) necessary */ 2133 fdc->state = DOSEEK; 2134 return (1); /* will return immediatly */ 2135 case MOTORWAIT: 2136 if(fd->flags & FD_MOTOR_WAIT) 2137 { 2138 return (0); /* time's not up yet */ 2139 } 2140 if (fdc->flags & FDC_NEEDS_RESET) { 2141 fdc->state = RESETCTLR; 2142 fdc->flags &= ~FDC_NEEDS_RESET; 2143 } else { 2144 /* 2145 * If all motors were off, then the controller was 2146 * reset, so it has lost track of the current 2147 * cylinder. Recalibrate to handle this case. 2148 * But first, discard the results of the reset. 2149 */ 2150 fdc->state = RESETCOMPLETE; 2151 } 2152 return (1); /* will return immediatly */ 2153 default: 2154 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2155 if (fd_read_status(fdc) == 0) 2156 printf("FDC status :%x %x %x %x %x %x %x ", 2157 fdc->status[0], 2158 fdc->status[1], 2159 fdc->status[2], 2160 fdc->status[3], 2161 fdc->status[4], 2162 fdc->status[5], 2163 fdc->status[6] ); 2164 else 2165 printf("No status available "); 2166 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2167 { 2168 printf("[controller is dead now]\n"); 2169 return (0); 2170 } 2171 printf("ST0 = %x, PCN = %x\n", st0, cyl); 2172 return (0); 2173 } 2174 /*XXX confusing: some branches return immediately, others end up here*/ 2175 return (1); /* Come back immediatly to new state */ 2176} 2177 2178static int 2179retrier(struct fdc_data *fdc) 2180{ 2181 struct bio *bp; 2182 struct fd_data *fd; 2183 int fdu; 2184 2185 bp = fdc->bp; 2186 2187 /* XXX shouldn't this be cached somewhere? */ 2188 fdu = FDUNIT(minor(bp->bio_dev)); 2189 fd = devclass_get_softc(fd_devclass, fdu); 2190 if (fd->options & FDOPT_NORETRY) 2191 goto fail; 2192 2193 switch (fdc->retry) { 2194 case 0: case 1: case 2: 2195 fdc->state = SEEKCOMPLETE; 2196 break; 2197 case 3: case 4: case 5: 2198 fdc->state = STARTRECAL; 2199 break; 2200 case 6: 2201 fdc->state = RESETCTLR; 2202 break; 2203 case 7: 2204 break; 2205 default: 2206 fail: 2207 { 2208 int printerror = (fd->options & FDOPT_NOERRLOG) == 0; 2209 2210 if (printerror) 2211 diskerr(bp, "hard error", 2212 fdc->fd->skip / DEV_BSIZE, 2213 (struct disklabel *)NULL); 2214 if (printerror) { 2215 if (fdc->flags & FDC_STAT_VALID) 2216 { 2217 printf( 2218 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2219 fdc->status[0], NE7_ST0BITS, 2220 fdc->status[1], NE7_ST1BITS, 2221 fdc->status[2], NE7_ST2BITS, 2222 fdc->status[3], fdc->status[4], 2223 fdc->status[5]); 2224 } 2225 else 2226 printf(" (No status)\n"); 2227 } 2228 } 2229 if ((fd->options & FDOPT_NOERROR) == 0) { 2230 bp->bio_flags |= BIO_ERROR; 2231 bp->bio_error = EIO; 2232 bp->bio_resid += bp->bio_bcount - fdc->fd->skip; 2233 } 2234 fdc->bp = NULL; 2235 fdc->fd->skip = 0; 2236 device_unbusy(fd->dev); 2237 biofinish(bp, &fdc->fd->device_stats, 0); 2238 fdc->state = FINDWORK; 2239 fdc->flags |= FDC_NEEDS_RESET; 2240 fdc->fd = (fd_p) 0; 2241 fdc->fdu = -1; 2242 return (1); 2243 } 2244 fdc->retry++; 2245 return (1); 2246} 2247 2248static void 2249fdbiodone(struct bio *bp) 2250{ 2251 wakeup(bp); 2252} 2253 2254static int 2255fdmisccmd(dev_t dev, u_int cmd, void *data) 2256{ 2257 fdu_t fdu; 2258 fd_p fd; 2259 struct bio *bp; 2260 struct fd_formb *finfo; 2261 struct fdc_readid *idfield; 2262 size_t fdblk; 2263 2264 fdu = FDUNIT(minor(dev)); 2265 fd = devclass_get_softc(fd_devclass, fdu); 2266 fdblk = 128 << fd->ft->secsize; 2267 finfo = (struct fd_formb *)data; 2268 idfield = (struct fdc_readid *)data; 2269 2270 bp = malloc(sizeof(struct bio), M_TEMP, M_ZERO | M_NOWAIT); 2271 if (bp == 0) 2272 return (ENOMEM); 2273 2274 /* 2275 * Set up a bio request for fdstrategy(). bio_blkno is faked 2276 * so that fdstrategy() will seek to the the requested 2277 * cylinder, and use the desired head. Since we are not 2278 * interested in bioqdisksort() munging with our faked bio 2279 * request, we mark it as being an ordered request. 2280 */ 2281 bp->bio_cmd = cmd; 2282 if (cmd == BIO_FORMAT) { 2283 bp->bio_blkno = 2284 (finfo->cyl * (fd->ft->sectrac * fd->ft->heads) + 2285 finfo->head * fd->ft->sectrac) * 2286 fdblk / DEV_BSIZE; 2287 bp->bio_bcount = sizeof(struct fd_idfield_data) * 2288 finfo->fd_formb_nsecs; 2289 } else if (cmd == BIO_RDSECTID) { 2290 bp->bio_blkno = 2291 (idfield->cyl * (fd->ft->sectrac * fd->ft->heads) + 2292 idfield->head * fd->ft->sectrac) * 2293 fdblk / DEV_BSIZE; 2294 bp->bio_bcount = sizeof(struct fdc_readid); 2295 } else 2296 panic("wrong cmd in fdmisccmd()"); 2297 bp->bio_data = data; 2298 bp->bio_dev = dev; 2299 bp->bio_done = fdbiodone; 2300 bp->bio_flags = BIO_ORDERED; 2301 2302 /* 2303 * Now run the cmd. The wait loop is a version of bufwait() 2304 * adapted for struct bio instead of struct buf and 2305 * specialized for the current context. 2306 */ 2307 fdstrategy(bp); 2308 while((bp->bio_flags & BIO_DONE) == 0) 2309 tsleep(bp, PRIBIO, "fdcmd", 0); 2310 2311 free(bp, M_TEMP); 2312 return (bp->bio_flags & BIO_ERROR ? bp->bio_error : 0); 2313} 2314 2315static int 2316fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 2317{ 2318 fdu_t fdu; 2319 fd_p fd; 2320 struct fd_type *fdt; 2321 struct disklabel *dl; 2322 struct fdc_status *fsp; 2323 struct fdc_readid *rid; 2324 char *buffer; 2325 size_t fdblk; 2326 int error = 0; 2327 2328 fdu = FDUNIT(minor(dev)); 2329 fd = devclass_get_softc(fd_devclass, fdu); 2330 fdblk = 128 << fd->ft->secsize; 2331 2332 switch (cmd) { 2333 case DIOCGDINFO: 2334 buffer = malloc(DEV_BSIZE, M_TEMP, M_ZERO | M_NOWAIT); 2335 if (buffer == 0) { 2336 error = ENOMEM; 2337 break; 2338 } 2339 dl = (struct disklabel *)buffer; 2340 dl->d_secsize = fdblk; 2341 fdt = fd->ft; 2342 dl->d_secpercyl = fdt->size / fdt->tracks; 2343 dl->d_type = DTYPE_FLOPPY; 2344 2345 if (readdisklabel(dkmodpart(dev, RAW_PART), dl) 2346 == NULL) 2347 error = 0; 2348 else 2349 error = EINVAL; 2350 2351 *(struct disklabel *)addr = *dl; 2352 free(buffer, M_TEMP); 2353 break; 2354 2355 case DIOCSDINFO: 2356 if ((flag & FWRITE) == 0) 2357 error = EBADF; 2358 break; 2359 2360 case DIOCWLABEL: 2361 if ((flag & FWRITE) == 0) 2362 error = EBADF; 2363 break; 2364 2365 case DIOCWDINFO: 2366 if ((flag & FWRITE) == 0) { 2367 error = EBADF; 2368 break; 2369 } 2370 2371 dl = (struct disklabel *)addr; 2372 2373 buffer = malloc(DEV_BSIZE, M_TEMP, M_ZERO | M_NOWAIT); 2374 if (buffer == 0) { 2375 error = ENOMEM; 2376 break; 2377 } 2378 if ((error = setdisklabel((struct disklabel *)buffer, dl, 2379 (u_long)0)) != 0) 2380 break; 2381 2382 error = writedisklabel(dev, (struct disklabel *)buffer); 2383 free(buffer, M_TEMP); 2384 break; 2385 2386 case FD_FORM: 2387 if ((flag & FWRITE) == 0) 2388 error = EBADF; /* must be opened for writing */ 2389 else if (((struct fd_formb *)addr)->format_version != 2390 FD_FORMAT_VERSION) 2391 error = EINVAL; /* wrong version of formatting prog */ 2392 else 2393 error = fdmisccmd(dev, BIO_FORMAT, addr); 2394 break; 2395 2396 case FD_GTYPE: /* get drive type */ 2397 *(struct fd_type *)addr = *fd->ft; 2398 break; 2399 2400 case FD_STYPE: /* set drive type */ 2401 /* this is considered harmful; only allow for superuser */ 2402 if (suser(p) != 0) 2403 return EPERM; 2404 *fd->ft = *(struct fd_type *)addr; 2405 break; 2406 2407 case FD_GOPTS: /* get drive options */ 2408 *(int *)addr = fd->options; 2409 break; 2410 2411 case FD_SOPTS: /* set drive options */ 2412 fd->options = *(int *)addr; 2413 break; 2414 2415#ifdef FDC_DEBUG 2416 case FD_DEBUG: 2417 fd_debug = *(int *)addr; 2418 break; 2419#endif 2420 2421 case FD_CLRERR: 2422 if (suser(p) != 0) 2423 return EPERM; 2424 fd->fdc->fdc_errs = 0; 2425 break; 2426 2427 case FD_GSTAT: 2428 fsp = (struct fdc_status *)addr; 2429 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2430 return EINVAL; 2431 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2432 break; 2433 2434 case FD_READID: 2435 rid = (struct fdc_readid *)addr; 2436 if (rid->cyl > MAX_CYLINDER || rid->head > MAX_HEAD) 2437 return EINVAL; 2438 error = fdmisccmd(dev, BIO_RDSECTID, addr); 2439 break; 2440 2441 default: 2442 error = ENOTTY; 2443 break; 2444 } 2445 return (error); 2446} 2447