fdc.c revision 76166
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 * Redistribution and use in source and binary forms, with or without 22 * modification, are permitted provided that the following conditions 23 * are met: 24 * 1. Redistributions of source code must retain the above copyright 25 * notice, this list of conditions and the following disclaimer. 26 * 2. Redistributions in binary form must reproduce the above copyright 27 * notice, this list of conditions and the following disclaimer in the 28 * documentation and/or other materials provided with the distribution. 29 * 3. All advertising materials mentioning features or use of this software 30 * must display the following acknowledgement: 31 * This product includes software developed by the University of 32 * California, Berkeley and its contributors. 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 * $FreeBSD: head/sys/dev/fdc/fdc.c 76166 2001-05-01 08:13:21Z markm $ 51 * 52 */ 53 54#include "opt_fdc.h" 55#include "card.h" 56 57#include <sys/param.h> 58#include <sys/systm.h> 59#include <sys/bio.h> 60#include <sys/bus.h> 61#include <sys/conf.h> 62#include <sys/devicestat.h> 63#include <sys/disklabel.h> 64#include <sys/fcntl.h> 65#include <sys/kernel.h> 66#include <sys/lock.h> 67#include <sys/malloc.h> 68#include <sys/module.h> 69#include <sys/mutex.h> 70#include <sys/proc.h> 71#include <sys/syslog.h> 72 73#include <sys/bus.h> 74#include <machine/bus.h> 75#include <sys/rman.h> 76 77#include <machine/clock.h> 78#include <machine/ioctl_fd.h> 79#include <machine/resource.h> 80#include <machine/stdarg.h> 81 82#include <isa/isavar.h> 83#include <isa/isareg.h> 84#include <isa/fdreg.h> 85#include <isa/fdc.h> 86#include <isa/rtc.h> 87 88/* misuse a flag to identify format operation */ 89 90/* configuration flags */ 91#define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */ 92#define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ 93 94/* internally used only, not really from CMOS: */ 95#define RTCFDT_144M_PRETENDED 0x1000 96 97/* error returns for fd_cmd() */ 98#define FD_FAILED -1 99#define FD_NOT_VALID -2 100#define FDC_ERRMAX 100 /* do not log more */ 101 102#define NUMTYPES 17 103#define NUMDENS (NUMTYPES - 7) 104 105/* These defines (-1) must match index for fd_types */ 106#define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */ 107#define NO_TYPE 0 /* must match NO_TYPE in ft.c */ 108#define FD_1720 1 109#define FD_1480 2 110#define FD_1440 3 111#define FD_1200 4 112#define FD_820 5 113#define FD_800 6 114#define FD_720 7 115#define FD_360 8 116#define FD_640 9 117#define FD_1232 10 118 119#define FD_1480in5_25 11 120#define FD_1440in5_25 12 121#define FD_820in5_25 13 122#define FD_800in5_25 14 123#define FD_720in5_25 15 124#define FD_360in5_25 16 125#define FD_640in5_25 17 126 127 128static struct fd_type fd_types[NUMTYPES] = 129{ 130{ 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */ 131{ 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */ 132{ 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */ 133{ 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */ 134{ 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */ 135{ 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */ 136{ 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */ 137{ 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */ 138{ 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */ 139{ 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */ 140 141{ 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */ 142{ 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */ 143{ 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */ 144{ 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */ 145{ 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */ 146{ 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */ 147{ 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */ 148}; 149 150#define DRVS_PER_CTLR 2 /* 2 floppies */ 151 152/***********************************************************************\ 153* Per controller structure. * 154\***********************************************************************/ 155static devclass_t fdc_devclass; 156 157/***********************************************************************\ 158* Per drive structure. * 159* N per controller (DRVS_PER_CTLR) * 160\***********************************************************************/ 161struct fd_data { 162 struct fdc_data *fdc; /* pointer to controller structure */ 163 int fdsu; /* this units number on this controller */ 164 int type; /* Drive type (FD_1440...) */ 165 struct fd_type *ft; /* pointer to the type descriptor */ 166 int flags; 167#define FD_OPEN 0x01 /* it's open */ 168#define FD_ACTIVE 0x02 /* it's active */ 169#define FD_MOTOR 0x04 /* motor should be on */ 170#define FD_MOTOR_WAIT 0x08 /* motor coming up */ 171 int skip; 172 int hddrv; 173#define FD_NO_TRACK -2 174 int track; /* where we think the head is */ 175 int options; /* user configurable options, see ioctl_fd.h */ 176 struct callout_handle toffhandle; 177 struct callout_handle tohandle; 178 struct devstat device_stats; 179 device_t dev; 180 fdu_t fdu; 181}; 182 183struct fdc_ivars { 184 int fdunit; 185}; 186static devclass_t fd_devclass; 187 188/***********************************************************************\ 189* Throughout this file the following conventions will be used: * 190* fd is a pointer to the fd_data struct for the drive in question * 191* fdc is a pointer to the fdc_data struct for the controller * 192* fdu is the floppy drive unit number * 193* fdcu is the floppy controller unit number * 194* fdsu is the floppy drive unit number on that controller. (sub-unit) * 195\***********************************************************************/ 196 197/* needed for ft driver, thus exported */ 198int in_fdc(struct fdc_data *); 199int out_fdc(struct fdc_data *, int); 200 201/* internal functions */ 202static void fdc_intr(void *); 203static void set_motor(struct fdc_data *, int, int); 204# define TURNON 1 205# define TURNOFF 0 206static timeout_t fd_turnoff; 207static timeout_t fd_motor_on; 208static void fd_turnon(struct fd_data *); 209static void fdc_reset(fdc_p); 210static int fd_in(struct fdc_data *, int *); 211static void fdstart(struct fdc_data *); 212static timeout_t fd_iotimeout; 213static timeout_t fd_pseudointr; 214static int fdstate(struct fdc_data *); 215static int retrier(struct fdc_data *); 216static int fdformat(dev_t, struct fd_formb *, struct proc *); 217 218static int enable_fifo(fdc_p fdc); 219 220static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 221 222 223#define DEVIDLE 0 224#define FINDWORK 1 225#define DOSEEK 2 226#define SEEKCOMPLETE 3 227#define IOCOMPLETE 4 228#define RECALCOMPLETE 5 229#define STARTRECAL 6 230#define RESETCTLR 7 231#define SEEKWAIT 8 232#define RECALWAIT 9 233#define MOTORWAIT 10 234#define IOTIMEDOUT 11 235#define RESETCOMPLETE 12 236#define PIOREAD 13 237 238#ifdef FDC_DEBUG 239static char const * const fdstates[] = 240{ 241"DEVIDLE", 242"FINDWORK", 243"DOSEEK", 244"SEEKCOMPLETE", 245"IOCOMPLETE", 246"RECALCOMPLETE", 247"STARTRECAL", 248"RESETCTLR", 249"SEEKWAIT", 250"RECALWAIT", 251"MOTORWAIT", 252"IOTIMEDOUT", 253"RESETCOMPLETE", 254"PIOREAD", 255}; 256 257/* CAUTION: fd_debug causes huge amounts of logging output */ 258static int volatile fd_debug = 0; 259#define TRACE0(arg) if(fd_debug) printf(arg) 260#define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2) 261#else /* FDC_DEBUG */ 262#define TRACE0(arg) 263#define TRACE1(arg1, arg2) 264#endif /* FDC_DEBUG */ 265 266static void 267fdout_wr(fdc_p fdc, u_int8_t v) 268{ 269 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 270} 271 272static u_int8_t 273fdsts_rd(fdc_p fdc) 274{ 275 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 276} 277 278static void 279fddata_wr(fdc_p fdc, u_int8_t v) 280{ 281 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 282} 283 284static u_int8_t 285fddata_rd(fdc_p fdc) 286{ 287 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 288} 289 290static void 291fdctl_wr_isa(fdc_p fdc, u_int8_t v) 292{ 293 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 294} 295 296#if NCARD > 0 297static void 298fdctl_wr_pcmcia(fdc_p fdc, u_int8_t v) 299{ 300 bus_space_write_1(fdc->portt, fdc->porth, FDCTL+fdc->port_off, v); 301} 302#endif 303 304#if 0 305 306static u_int8_t 307fdin_rd(fdc_p fdc) 308{ 309 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 310} 311 312#endif 313 314static d_open_t Fdopen; /* NOTE, not fdopen */ 315static d_close_t fdclose; 316static d_ioctl_t fdioctl; 317static d_strategy_t fdstrategy; 318 319#define CDEV_MAJOR 9 320 321static struct cdevsw fd_cdevsw = { 322 /* open */ Fdopen, 323 /* close */ fdclose, 324 /* read */ physread, 325 /* write */ physwrite, 326 /* ioctl */ fdioctl, 327 /* poll */ nopoll, 328 /* mmap */ nommap, 329 /* strategy */ fdstrategy, 330 /* name */ "fd", 331 /* maj */ CDEV_MAJOR, 332 /* dump */ nodump, 333 /* psize */ nopsize, 334 /* flags */ D_DISK, 335}; 336 337static int 338fdc_err(struct fdc_data *fdc, const char *s) 339{ 340 fdc->fdc_errs++; 341 if (s) { 342 if (fdc->fdc_errs < FDC_ERRMAX) 343 device_printf(fdc->fdc_dev, "%s", s); 344 else if (fdc->fdc_errs == FDC_ERRMAX) 345 device_printf(fdc->fdc_dev, "too many errors, not " 346 "logging any more\n"); 347 } 348 349 return FD_FAILED; 350} 351 352/* 353 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 354 * Unit number, 355 * # of output bytes, output bytes as ints ..., 356 * # of input bytes, input bytes as ints ... 357 */ 358static int 359fd_cmd(struct fdc_data *fdc, int n_out, ...) 360{ 361 u_char cmd; 362 int n_in; 363 int n; 364 va_list ap; 365 366 va_start(ap, n_out); 367 cmd = (u_char)(va_arg(ap, int)); 368 va_end(ap); 369 va_start(ap, n_out); 370 for (n = 0; n < n_out; n++) 371 { 372 if (out_fdc(fdc, va_arg(ap, int)) < 0) 373 { 374 char msg[50]; 375 snprintf(msg, sizeof(msg), 376 "cmd %x failed at out byte %d of %d\n", 377 cmd, n + 1, n_out); 378 return fdc_err(fdc, msg); 379 } 380 } 381 n_in = va_arg(ap, int); 382 for (n = 0; n < n_in; n++) 383 { 384 int *ptr = va_arg(ap, int *); 385 if (fd_in(fdc, ptr) < 0) 386 { 387 char msg[50]; 388 snprintf(msg, sizeof(msg), 389 "cmd %02x failed at in byte %d of %d\n", 390 cmd, n + 1, n_in); 391 return fdc_err(fdc, msg); 392 } 393 } 394 395 return 0; 396} 397 398static int 399enable_fifo(fdc_p fdc) 400{ 401 int i, j; 402 403 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 404 405 /* 406 * XXX: 407 * Cannot use fd_cmd the normal way here, since 408 * this might be an invalid command. Thus we send the 409 * first byte, and check for an early turn of data directon. 410 */ 411 412 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 413 return fdc_err(fdc, "Enable FIFO failed\n"); 414 415 /* If command is invalid, return */ 416 j = 100000; 417 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 418 != NE7_RQM && j-- > 0) 419 if (i == (NE7_DIO | NE7_RQM)) { 420 fdc_reset(fdc); 421 return FD_FAILED; 422 } 423 if (j<0 || 424 fd_cmd(fdc, 3, 425 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 426 fdc_reset(fdc); 427 return fdc_err(fdc, "Enable FIFO failed\n"); 428 } 429 fdc->flags |= FDC_HAS_FIFO; 430 return 0; 431 } 432 if (fd_cmd(fdc, 4, 433 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 434 return fdc_err(fdc, "Re-enable FIFO failed\n"); 435 return 0; 436} 437 438static int 439fd_sense_drive_status(fdc_p fdc, int *st3p) 440{ 441 int st3; 442 443 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 444 { 445 return fdc_err(fdc, "Sense Drive Status failed\n"); 446 } 447 if (st3p) 448 *st3p = st3; 449 450 return 0; 451} 452 453static int 454fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 455{ 456 int cyl, st0, ret; 457 458 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 459 if (ret) { 460 (void)fdc_err(fdc, 461 "sense intr err reading stat reg 0\n"); 462 return ret; 463 } 464 465 if (st0p) 466 *st0p = st0; 467 468 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 469 /* 470 * There doesn't seem to have been an interrupt. 471 */ 472 return FD_NOT_VALID; 473 } 474 475 if (fd_in(fdc, &cyl) < 0) { 476 return fdc_err(fdc, "can't get cyl num\n"); 477 } 478 479 if (cylp) 480 *cylp = cyl; 481 482 return 0; 483} 484 485 486static int 487fd_read_status(fdc_p fdc, int fdsu) 488{ 489 int i, ret; 490 491 for (i = 0; i < 7; i++) { 492 /* 493 * XXX types are poorly chosen. Only bytes can by read 494 * from the hardware, but fdc->status[] wants u_ints and 495 * fd_in() gives ints. 496 */ 497 int status; 498 499 ret = fd_in(fdc, &status); 500 fdc->status[i] = status; 501 if (ret != 0) 502 break; 503 } 504 505 if (ret == 0) 506 fdc->flags |= FDC_STAT_VALID; 507 else 508 fdc->flags &= ~FDC_STAT_VALID; 509 510 return ret; 511} 512 513/****************************************************************************/ 514/* autoconfiguration stuff */ 515/****************************************************************************/ 516 517static int 518fdc_alloc_resources(struct fdc_data *fdc) 519{ 520 device_t dev; 521 int ispnp, ispcmcia; 522 523 dev = fdc->fdc_dev; 524 ispnp = (fdc->flags & FDC_ISPNP) != 0; 525 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 526 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 527 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 528 529 /* 530 * On standard ISA, we don't just use an 8 port range 531 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 532 * register at 0x3f6. 533 * 534 * Isn't PC hardware wonderful. 535 * 536 * The Y-E Data PCMCIA FDC doesn't have this problem, it 537 * uses the register with offset 6 for pseudo-DMA, and the 538 * one with offset 7 as control register. 539 */ 540 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 541 &fdc->rid_ioport, 0ul, ~0ul, 542 ispcmcia ? 8 : (ispnp ? 1 : 6), 543 RF_ACTIVE); 544 if (fdc->res_ioport == 0) { 545 device_printf(dev, "cannot reserve I/O port range\n"); 546 return ENXIO; 547 } 548 fdc->portt = rman_get_bustag(fdc->res_ioport); 549 fdc->porth = rman_get_bushandle(fdc->res_ioport); 550 551 if (!ispcmcia) { 552 /* 553 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 554 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 555 * by checking the size and adjust the port address 556 * accordingly. 557 */ 558 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 559 fdc->port_off = -2; 560 561 /* 562 * Register the control port range as rid 1 if it 563 * isn't there already. Most PnP BIOSen will have 564 * already done this but non-PnP configurations don't. 565 * 566 * And some (!!) report 0x3f2-0x3f5 and completely 567 * leave out the control register! It seems that some 568 * non-antique controller chips have a different 569 * method of programming the transfer speed which 570 * doesn't require the control register, but it's 571 * mighty bogus as the chip still responds to the 572 * address for the control register. 573 */ 574 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 575 u_long ctlstart; 576 577 /* Find the control port, usually 0x3f7 */ 578 ctlstart = rman_get_start(fdc->res_ioport) + 579 fdc->port_off + 7; 580 581 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); 582 } 583 584 /* 585 * Now (finally!) allocate the control port. 586 */ 587 fdc->rid_ctl = 1; 588 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 589 &fdc->rid_ctl, 590 0ul, ~0ul, 1, RF_ACTIVE); 591 if (fdc->res_ctl == 0) { 592 device_printf(dev, 593 "cannot reserve control I/O port range\n"); 594 return ENXIO; 595 } 596 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 597 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 598 } 599 600 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 601 &fdc->rid_irq, 0ul, ~0ul, 1, 602 RF_ACTIVE); 603 if (fdc->res_irq == 0) { 604 device_printf(dev, "cannot reserve interrupt line\n"); 605 return ENXIO; 606 } 607 608 if ((fdc->flags & FDC_NODMA) == 0) { 609 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 610 &fdc->rid_drq, 0ul, ~0ul, 1, 611 RF_ACTIVE); 612 if (fdc->res_drq == 0) { 613 device_printf(dev, "cannot reserve DMA request line\n"); 614 return ENXIO; 615 } 616 fdc->dmachan = fdc->res_drq->r_start; 617 } 618 619 return 0; 620} 621 622static void 623fdc_release_resources(struct fdc_data *fdc) 624{ 625 device_t dev; 626 627 dev = fdc->fdc_dev; 628 if (fdc->res_irq != 0) { 629 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 630 fdc->res_irq); 631 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 632 fdc->res_irq); 633 } 634 if (fdc->res_ctl != 0) { 635 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 636 fdc->res_ctl); 637 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 638 fdc->res_ctl); 639 } 640 if (fdc->res_ioport != 0) { 641 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 642 fdc->res_ioport); 643 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 644 fdc->res_ioport); 645 } 646 if (fdc->res_drq != 0) { 647 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 648 fdc->res_drq); 649 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 650 fdc->res_drq); 651 } 652} 653 654/****************************************************************************/ 655/* autoconfiguration stuff */ 656/****************************************************************************/ 657 658static struct isa_pnp_id fdc_ids[] = { 659 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 660 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 661 {0} 662}; 663 664static int 665fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 666{ 667 struct fdc_ivars *ivars = device_get_ivars(child); 668 669 switch (which) { 670 case FDC_IVAR_FDUNIT: 671 *result = ivars->fdunit; 672 break; 673 default: 674 return ENOENT; 675 } 676 return 0; 677} 678 679/* 680 * fdc controller section. 681 */ 682static int 683fdc_probe(device_t dev) 684{ 685 int error, ic_type; 686 struct fdc_data *fdc; 687 688 fdc = device_get_softc(dev); 689 bzero(fdc, sizeof *fdc); 690 fdc->fdc_dev = dev; 691 fdc->fdctl_wr = fdctl_wr_isa; 692 693 /* Check pnp ids */ 694 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 695 if (error == ENXIO) 696 return ENXIO; 697 if (error == 0) 698 fdc->flags |= FDC_ISPNP; 699 700 /* Attempt to allocate our resources for the duration of the probe */ 701 error = fdc_alloc_resources(fdc); 702 if (error) 703 goto out; 704 705 /* First - lets reset the floppy controller */ 706 fdout_wr(fdc, 0); 707 DELAY(100); 708 fdout_wr(fdc, FDO_FRST); 709 710 /* see if it can handle a command */ 711 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 712 NE7_SPEC_2(2, 0), 0)) { 713 error = ENXIO; 714 goto out; 715 } 716 717 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 718 ic_type = (u_char)ic_type; 719 switch (ic_type) { 720 case 0x80: 721 device_set_desc(dev, "NEC 765 or clone"); 722 fdc->fdct = FDC_NE765; 723 break; 724 case 0x81: 725 device_set_desc(dev, "Intel 82077 or clone"); 726 fdc->fdct = FDC_I82077; 727 break; 728 case 0x90: 729 device_set_desc(dev, "NEC 72065B or clone"); 730 fdc->fdct = FDC_NE72065; 731 break; 732 default: 733 device_set_desc(dev, "generic floppy controller"); 734 fdc->fdct = FDC_UNKNOWN; 735 break; 736 } 737 } 738 739out: 740 fdc_release_resources(fdc); 741 return (error); 742} 743 744#if NCARD > 0 745 746static int 747fdc_pccard_probe(device_t dev) 748{ 749 int error; 750 struct fdc_data *fdc; 751 752 fdc = device_get_softc(dev); 753 bzero(fdc, sizeof *fdc); 754 fdc->fdc_dev = dev; 755 fdc->fdctl_wr = fdctl_wr_pcmcia; 756 757 fdc->flags |= FDC_ISPCMCIA | FDC_NODMA; 758 759 /* Attempt to allocate our resources for the duration of the probe */ 760 error = fdc_alloc_resources(fdc); 761 if (error) 762 goto out; 763 764 /* First - lets reset the floppy controller */ 765 fdout_wr(fdc, 0); 766 DELAY(100); 767 fdout_wr(fdc, FDO_FRST); 768 769 /* see if it can handle a command */ 770 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 771 NE7_SPEC_2(2, 0), 0)) { 772 error = ENXIO; 773 goto out; 774 } 775 776 device_set_desc(dev, "Y-E Data PCMCIA floppy"); 777 fdc->fdct = FDC_NE765; 778 779out: 780 fdc_release_resources(fdc); 781 return (error); 782} 783 784static int 785fdc_pccard_detach(device_t dev) 786{ 787 struct fdc_data *fdc; 788 int error; 789 790 fdc = device_get_softc(dev); 791 792 /* have our children detached first */ 793 if ((error = bus_generic_detach(dev))) 794 return (error); 795 796 if ((fdc->flags & FDC_ATTACHED) == 0) { 797 device_printf(dev, "already unloaded\n"); 798 return (0); 799 } 800 fdc->flags &= ~FDC_ATTACHED; 801 802 BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq, 803 fdc->fdc_intr); 804 fdc_release_resources(fdc); 805 device_printf(dev, "unload\n"); 806 return (0); 807} 808 809#endif /* NCARD > 0 */ 810 811/* 812 * Add a child device to the fdc controller. It will then be probed etc. 813 */ 814static void 815fdc_add_child(device_t dev, const char *name, int unit) 816{ 817 int disabled; 818 struct fdc_ivars *ivar; 819 device_t child; 820 821 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO); 822 if (ivar == NULL) 823 return; 824 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 825 ivar->fdunit = 0; 826 child = device_add_child(dev, name, unit); 827 if (child == NULL) 828 return; 829 device_set_ivars(child, ivar); 830 if (resource_int_value(name, unit, "disabled", &disabled) == 0 831 && disabled != 0) 832 device_disable(child); 833} 834 835static int 836fdc_attach(device_t dev) 837{ 838 struct fdc_data *fdc; 839 int i, error; 840 const char *name; 841 842 fdc = device_get_softc(dev); 843 error = fdc_alloc_resources(fdc); 844 if (error) { 845 device_printf(dev, "cannot re-aquire resources\n"); 846 return error; 847 } 848 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 849 INTR_TYPE_BIO | INTR_ENTROPY, fdc_intr, fdc, 850 &fdc->fdc_intr); 851 if (error) { 852 device_printf(dev, "cannot setup interrupt\n"); 853 return error; 854 } 855 fdc->fdcu = device_get_unit(dev); 856 fdc->flags |= FDC_ATTACHED; 857 858 if ((fdc->flags & FDC_NODMA) == 0) { 859 /* Acquire the DMA channel forever, The driver will do the rest */ 860 /* XXX should integrate with rman */ 861 isa_dma_acquire(fdc->dmachan); 862 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */); 863 } 864 fdc->state = DEVIDLE; 865 866 /* reset controller, turn motor off, clear fdout mirror reg */ 867 fdout_wr(fdc, ((fdc->fdout = 0))); 868 bioq_init(&fdc->head); 869 870 /* 871 * Probe and attach any children. We should probably detect 872 * devices from the BIOS unless overridden. 873 */ 874 name = device_get_nameunit(dev); 875 i = -1; 876 while ((i = resource_query_string(i, "at", name)) != -1) 877 fdc_add_child(dev, resource_query_name(i), 878 resource_query_unit(i)); 879 880 return (bus_generic_attach(dev)); 881} 882 883static int 884fdc_print_child(device_t me, device_t child) 885{ 886 int retval = 0; 887 888 retval += bus_print_child_header(me, child); 889 retval += printf(" on %s drive %d\n", device_get_nameunit(me), 890 fdc_get_fdunit(child)); 891 892 return (retval); 893} 894 895static device_method_t fdc_methods[] = { 896 /* Device interface */ 897 DEVMETHOD(device_probe, fdc_probe), 898 DEVMETHOD(device_attach, fdc_attach), 899 DEVMETHOD(device_detach, bus_generic_detach), 900 DEVMETHOD(device_shutdown, bus_generic_shutdown), 901 DEVMETHOD(device_suspend, bus_generic_suspend), 902 DEVMETHOD(device_resume, bus_generic_resume), 903 904 /* Bus interface */ 905 DEVMETHOD(bus_print_child, fdc_print_child), 906 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 907 /* Our children never use any other bus interface methods. */ 908 909 { 0, 0 } 910}; 911 912static driver_t fdc_driver = { 913 "fdc", 914 fdc_methods, 915 sizeof(struct fdc_data) 916}; 917 918DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 919 920#if NCARD > 0 921 922static device_method_t fdc_pccard_methods[] = { 923 /* Device interface */ 924 DEVMETHOD(device_probe, fdc_pccard_probe), 925 DEVMETHOD(device_attach, fdc_attach), 926 DEVMETHOD(device_detach, fdc_pccard_detach), 927 DEVMETHOD(device_shutdown, bus_generic_shutdown), 928 DEVMETHOD(device_suspend, bus_generic_suspend), 929 DEVMETHOD(device_resume, bus_generic_resume), 930 931 /* Bus interface */ 932 DEVMETHOD(bus_print_child, fdc_print_child), 933 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 934 /* Our children never use any other bus interface methods. */ 935 936 { 0, 0 } 937}; 938 939static driver_t fdc_pccard_driver = { 940 "fdc", 941 fdc_pccard_methods, 942 sizeof(struct fdc_data) 943}; 944 945DRIVER_MODULE(fdc, pccard, fdc_pccard_driver, fdc_devclass, 0, 0); 946 947#endif /* NCARD > 0 */ 948 949static void fd_clone __P((void *arg, char *name, int namelen, dev_t *dev)); 950 951static struct { 952 char *match; 953 int minor; 954 int link; 955} fd_suffix[] = { 956 { "a", 0, 1 }, 957 { "b", 0, 1 }, 958 { "c", 0, 1 }, 959 { "d", 0, 1 }, 960 { "e", 0, 1 }, 961 { "f", 0, 1 }, 962 { "g", 0, 1 }, 963 { "h", 0, 1 }, 964 { ".1720", 1, 0 }, 965 { ".1480", 2, 0 }, 966 { ".1440", 3, 0 }, 967 { ".1200", 4, 0 }, 968 { ".820", 5, 0 }, 969 { ".800", 6, 0 }, 970 { ".720", 7, 0 }, 971 { ".360", 8, 0 }, 972 { ".640", 9, 0 }, 973 { ".1232", 10, 0 }, 974 { 0, 0 } 975}; 976static void 977fd_clone(arg, name, namelen, dev) 978 void *arg; 979 char *name; 980 int namelen; 981 dev_t *dev; 982{ 983 int u, d, i; 984 char *n; 985 dev_t pdev; 986 987 if (*dev != NODEV) 988 return; 989 if (dev_stdclone(name, &n, "fd", &u) != 2) 990 return; 991 for (i = 0; ; i++) { 992 if (fd_suffix[i].match == NULL) 993 return; 994 if (strcmp(n, fd_suffix[i].match)) 995 continue; 996 d = fd_suffix[i].minor; 997 break; 998 } 999 if (fd_suffix[i].link == 0) { 1000 *dev = make_dev(&fd_cdevsw, (u << 6) + d, 1001 UID_ROOT, GID_OPERATOR, 0640, name); 1002 } else { 1003 pdev = makedev(fd_cdevsw.d_maj, (u << 6) + d); 1004 *dev = make_dev_alias(pdev, name); 1005 } 1006} 1007 1008/******************************************************************/ 1009/* 1010 * devices attached to the controller section. 1011 */ 1012static int 1013fd_probe(device_t dev) 1014{ 1015 int i; 1016 u_int fdt, st0, st3; 1017 struct fd_data *fd; 1018 struct fdc_data *fdc; 1019 fdsu_t fdsu; 1020 static int fd_fifo = 0; 1021 1022 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 1023 fd = device_get_softc(dev); 1024 fdc = device_get_softc(device_get_parent(dev)); 1025 1026 bzero(fd, sizeof *fd); 1027 fd->dev = dev; 1028 fd->fdc = fdc; 1029 fd->fdsu = fdsu; 1030 fd->fdu = device_get_unit(dev); 1031 1032#ifdef __i386__ 1033 /* look up what bios thinks we have */ 1034 switch (fd->fdu) { 1035 case 0: 1036 if ((fdc->flags & FDC_ISPCMCIA)) 1037 fdt = RTCFDT_144M; 1038 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0) 1039 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED; 1040 else 1041 fdt = (rtcin(RTC_FDISKETTE) & 0xf0); 1042 break; 1043 case 1: 1044 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0); 1045 break; 1046 default: 1047 fdt = RTCFDT_NONE; 1048 break; 1049 } 1050#else 1051 fdt = RTCFDT_144M; /* XXX probably */ 1052#endif 1053 1054 /* is there a unit? */ 1055 if (fdt == RTCFDT_NONE) 1056 return (ENXIO); 1057 1058 /* select it */ 1059 set_motor(fdc, fdsu, TURNON); 1060 DELAY(1000000); /* 1 sec */ 1061 1062 /* XXX This doesn't work before the first set_motor() */ 1063 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN 1064 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 1065 && enable_fifo(fdc) == 0) { 1066 device_printf(device_get_parent(dev), 1067 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 1068 } 1069 fd_fifo = 1; 1070 1071 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) 1072 && (st3 & NE7_ST3_T0)) { 1073 /* if at track 0, first seek inwards */ 1074 /* seek some steps: */ 1075 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0); 1076 DELAY(300000); /* ...wait a moment... */ 1077 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */ 1078 } 1079 1080 /* If we're at track 0 first seek inwards. */ 1081 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) { 1082 /* Seek some steps... */ 1083 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 1084 /* ...wait a moment... */ 1085 DELAY(300000); 1086 /* make ctrlr happy: */ 1087 fd_sense_int(fdc, 0, 0); 1088 } 1089 } 1090 1091 for (i = 0; i < 2; i++) { 1092 /* 1093 * we must recalibrate twice, just in case the 1094 * heads have been beyond cylinder 76, since most 1095 * FDCs still barf when attempting to recalibrate 1096 * more than 77 steps 1097 */ 1098 /* go back to 0: */ 1099 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 1100 /* a second being enough for full stroke seek*/ 1101 DELAY(i == 0 ? 1000000 : 300000); 1102 1103 /* anything responding? */ 1104 if (fd_sense_int(fdc, &st0, 0) == 0 && 1105 (st0 & NE7_ST0_EC) == 0) 1106 break; /* already probed succesfully */ 1107 } 1108 } 1109 1110 set_motor(fdc, fdsu, TURNOFF); 1111 1112 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */ 1113 return (ENXIO); 1114 1115 fd->track = FD_NO_TRACK; 1116 fd->fdc = fdc; 1117 fd->fdsu = fdsu; 1118 fd->options = 0; 1119 callout_handle_init(&fd->toffhandle); 1120 callout_handle_init(&fd->tohandle); 1121 1122 switch (fdt) { 1123 case RTCFDT_12M: 1124 device_set_desc(dev, "1200-KB 5.25\" drive"); 1125 fd->type = FD_1200; 1126 break; 1127 case RTCFDT_144M | RTCFDT_144M_PRETENDED: 1128 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive"); 1129 fdt = RTCFDT_144M; 1130 fd->type = FD_1440; 1131 case RTCFDT_144M: 1132 device_set_desc(dev, "1440-KB 3.5\" drive"); 1133 fd->type = FD_1440; 1134 break; 1135 case RTCFDT_288M: 1136 case RTCFDT_288M_1: 1137 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 1138 fd->type = FD_1440; 1139 break; 1140 case RTCFDT_360K: 1141 device_set_desc(dev, "360-KB 5.25\" drive"); 1142 fd->type = FD_360; 1143 break; 1144 case RTCFDT_720K: 1145 printf("720-KB 3.5\" drive"); 1146 fd->type = FD_720; 1147 break; 1148 default: 1149 return (ENXIO); 1150 } 1151 return (0); 1152} 1153 1154static int 1155fd_attach(device_t dev) 1156{ 1157 struct fd_data *fd; 1158 static int cdevsw_add_done = 0; 1159 1160 fd = device_get_softc(dev); 1161 1162 if (!cdevsw_add_done) { 1163 cdevsw_add(&fd_cdevsw); /* XXX */ 1164 cdevsw_add_done++; 1165 } 1166 EVENTHANDLER_REGISTER(dev_clone, fd_clone, 0, 1000); 1167 make_dev(&fd_cdevsw, (fd->fdu << 6), 1168 UID_ROOT, GID_OPERATOR, 0640, "fd%d", fd->fdu); 1169 1170 /* 1171 * Export the drive to the devstat interface. 1172 */ 1173 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1174 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS, 1175 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1176 DEVSTAT_PRIORITY_FD); 1177 return (0); 1178} 1179 1180static int 1181fd_detach(device_t dev) 1182{ 1183 struct fd_data *fd; 1184 1185 fd = device_get_softc(dev); 1186 untimeout(fd_turnoff, fd, fd->toffhandle); 1187 1188 return (0); 1189} 1190 1191static device_method_t fd_methods[] = { 1192 /* Device interface */ 1193 DEVMETHOD(device_probe, fd_probe), 1194 DEVMETHOD(device_attach, fd_attach), 1195 DEVMETHOD(device_detach, fd_detach), 1196 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1197 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1198 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1199 1200 { 0, 0 } 1201}; 1202 1203static driver_t fd_driver = { 1204 "fd", 1205 fd_methods, 1206 sizeof(struct fd_data) 1207}; 1208 1209DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1210 1211/****************************************************************************/ 1212/* motor control stuff */ 1213/* remember to not deselect the drive we're working on */ 1214/****************************************************************************/ 1215static void 1216set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1217{ 1218 int fdout = fdc->fdout; 1219 int needspecify = 0; 1220 1221 if(turnon) { 1222 fdout &= ~FDO_FDSEL; 1223 fdout |= (FDO_MOEN0 << fdsu) + fdsu; 1224 } else 1225 fdout &= ~(FDO_MOEN0 << fdsu); 1226 1227 if(!turnon 1228 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0) 1229 /* gonna turn off the last drive, put FDC to bed */ 1230 fdout &= ~ (FDO_FRST|FDO_FDMAEN); 1231 else { 1232 /* make sure controller is selected and specified */ 1233 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0) 1234 needspecify = 1; 1235 fdout |= (FDO_FRST|FDO_FDMAEN); 1236 } 1237 1238 fdout_wr(fdc, fdout); 1239 fdc->fdout = fdout; 1240 TRACE1("[0x%x->FDOUT]", fdout); 1241 1242 if (needspecify) { 1243 /* 1244 * XXX 1245 * special case: since we have just woken up the FDC 1246 * from its sleep, we silently assume the command will 1247 * be accepted, and do not test for a timeout 1248 */ 1249 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1250 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1251 0); 1252 if (fdc->flags & FDC_HAS_FIFO) 1253 (void) enable_fifo(fdc); 1254 } 1255} 1256 1257static void 1258fd_turnoff(void *xfd) 1259{ 1260 int s; 1261 fd_p fd = xfd; 1262 1263 TRACE1("[fd%d: turnoff]", fd->fdu); 1264 1265 s = splbio(); 1266 /* 1267 * Don't turn off the motor yet if the drive is active. 1268 * 1269 * If we got here, this could only mean we missed an interrupt. 1270 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1271 * after a controller reset. Just schedule a pseudo-interrupt 1272 * so the state machine gets re-entered. 1273 */ 1274 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1275 fdc_intr(fd->fdc); 1276 splx(s); 1277 return; 1278 } 1279 1280 fd->flags &= ~FD_MOTOR; 1281 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1282 splx(s); 1283} 1284 1285static void 1286fd_motor_on(void *xfd) 1287{ 1288 int s; 1289 fd_p fd = xfd; 1290 1291 s = splbio(); 1292 fd->flags &= ~FD_MOTOR_WAIT; 1293 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1294 { 1295 fdc_intr(fd->fdc); 1296 } 1297 splx(s); 1298} 1299 1300static void 1301fd_turnon(fd_p fd) 1302{ 1303 if(!(fd->flags & FD_MOTOR)) 1304 { 1305 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1306 set_motor(fd->fdc, fd->fdsu, TURNON); 1307 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */ 1308 } 1309} 1310 1311static void 1312fdc_reset(fdc_p fdc) 1313{ 1314 /* Try a reset, keep motor on */ 1315 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1316 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1317 DELAY(100); 1318 /* enable FDC, but defer interrupts a moment */ 1319 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1320 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1321 DELAY(100); 1322 fdout_wr(fdc, fdc->fdout); 1323 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1324 1325 /* XXX after a reset, silently believe the FDC will accept commands */ 1326 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1327 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1328 0); 1329 if (fdc->flags & FDC_HAS_FIFO) 1330 (void) enable_fifo(fdc); 1331} 1332 1333/****************************************************************************/ 1334/* fdc in/out */ 1335/****************************************************************************/ 1336int 1337in_fdc(struct fdc_data *fdc) 1338{ 1339 int i, j = 100000; 1340 while ((i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) 1341 != (NE7_DIO|NE7_RQM) && j-- > 0) 1342 if (i == NE7_RQM) 1343 return fdc_err(fdc, "ready for output in input\n"); 1344 if (j <= 0) 1345 return fdc_err(fdc, bootverbose? "input ready timeout\n": 0); 1346#ifdef FDC_DEBUG 1347 i = fddata_rd(fdc); 1348 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1349 return(i); 1350#else /* !FDC_DEBUG */ 1351 return fddata_rd(fdc); 1352#endif /* FDC_DEBUG */ 1353} 1354 1355/* 1356 * fd_in: Like in_fdc, but allows you to see if it worked. 1357 */ 1358static int 1359fd_in(struct fdc_data *fdc, int *ptr) 1360{ 1361 int i, j = 100000; 1362 while ((i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) 1363 != (NE7_DIO|NE7_RQM) && j-- > 0) 1364 if (i == NE7_RQM) 1365 return fdc_err(fdc, "ready for output in input\n"); 1366 if (j <= 0) 1367 return fdc_err(fdc, bootverbose? "input ready timeout\n": 0); 1368#ifdef FDC_DEBUG 1369 i = fddata_rd(fdc); 1370 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1371 *ptr = i; 1372 return 0; 1373#else /* !FDC_DEBUG */ 1374 i = fddata_rd(fdc); 1375 if (ptr) 1376 *ptr = i; 1377 return 0; 1378#endif /* FDC_DEBUG */ 1379} 1380 1381int 1382out_fdc(struct fdc_data *fdc, int x) 1383{ 1384 int i; 1385 1386 /* Check that the direction bit is set */ 1387 i = 100000; 1388 while ((fdsts_rd(fdc) & NE7_DIO) && i-- > 0); 1389 if (i <= 0) return fdc_err(fdc, "direction bit not set\n"); 1390 1391 /* Check that the floppy controller is ready for a command */ 1392 i = 100000; 1393 while ((fdsts_rd(fdc) & NE7_RQM) == 0 && i-- > 0); 1394 if (i <= 0) 1395 return fdc_err(fdc, bootverbose? "output ready timeout\n": 0); 1396 1397 /* Send the command and return */ 1398 fddata_wr(fdc, x); 1399 TRACE1("[0x%x->FDDATA]", x); 1400 return (0); 1401} 1402 1403/****************************************************************************/ 1404/* fdopen/fdclose */ 1405/****************************************************************************/ 1406int 1407Fdopen(dev_t dev, int flags, int mode, struct proc *p) 1408{ 1409 fdu_t fdu = FDUNIT(minor(dev)); 1410 int type = FDTYPE(minor(dev)); 1411 fd_p fd; 1412 fdc_p fdc; 1413 1414 /* check bounds */ 1415 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1416 return (ENXIO); 1417 fdc = fd->fdc; 1418 if ((fdc == NULL) || (fd->type == NO_TYPE)) 1419 return (ENXIO); 1420 if (type > NUMDENS) 1421 return (ENXIO); 1422 if (type == 0) 1423 type = fd->type; 1424 else { 1425 /* 1426 * For each type of basic drive, make sure we are trying 1427 * to open a type it can do, 1428 */ 1429 if (type != fd->type) { 1430 switch (fd->type) { 1431 case FD_360: 1432 return (ENXIO); 1433 case FD_720: 1434 if ( type != FD_820 1435 && type != FD_800 1436 && type != FD_640 1437 ) 1438 return (ENXIO); 1439 break; 1440 case FD_1200: 1441 switch (type) { 1442 case FD_1480: 1443 type = FD_1480in5_25; 1444 break; 1445 case FD_1440: 1446 type = FD_1440in5_25; 1447 break; 1448 case FD_1232: 1449 break; 1450 case FD_820: 1451 type = FD_820in5_25; 1452 break; 1453 case FD_800: 1454 type = FD_800in5_25; 1455 break; 1456 case FD_720: 1457 type = FD_720in5_25; 1458 break; 1459 case FD_640: 1460 type = FD_640in5_25; 1461 break; 1462 case FD_360: 1463 type = FD_360in5_25; 1464 break; 1465 default: 1466 return(ENXIO); 1467 } 1468 break; 1469 case FD_1440: 1470 if ( type != FD_1720 1471 && type != FD_1480 1472 && type != FD_1200 1473 && type != FD_820 1474 && type != FD_800 1475 && type != FD_720 1476 && type != FD_640 1477 ) 1478 return(ENXIO); 1479 break; 1480 } 1481 } 1482 } 1483 fd->ft = fd_types + type - 1; 1484 fd->flags |= FD_OPEN; 1485 1486 return 0; 1487} 1488 1489int 1490fdclose(dev_t dev, int flags, int mode, struct proc *p) 1491{ 1492 fdu_t fdu = FDUNIT(minor(dev)); 1493 struct fd_data *fd; 1494 1495 fd = devclass_get_softc(fd_devclass, fdu); 1496 fd->flags &= ~FD_OPEN; 1497 fd->options &= ~FDOPT_NORETRY; 1498 1499 return (0); 1500} 1501 1502/****************************************************************************/ 1503/* fdstrategy */ 1504/****************************************************************************/ 1505void 1506fdstrategy(struct bio *bp) 1507{ 1508 unsigned nblocks, blknum, cando; 1509 int s; 1510 fdu_t fdu; 1511 fdc_p fdc; 1512 fd_p fd; 1513 size_t fdblk; 1514 1515 fdu = FDUNIT(minor(bp->bio_dev)); 1516 fd = devclass_get_softc(fd_devclass, fdu); 1517 if (fd == 0) 1518 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1519 (u_long)major(bp->bio_dev), (u_long)minor(bp->bio_dev)); 1520 fdc = fd->fdc; 1521 if (fd->type == NO_TYPE) { 1522 bp->bio_error = ENXIO; 1523 bp->bio_flags |= BIO_ERROR; 1524 goto bad; 1525 }; 1526 1527 fdblk = 128 << (fd->ft->secsize); 1528 if (!(bp->bio_cmd & BIO_FORMAT)) { 1529 if (bp->bio_blkno < 0) { 1530 printf( 1531 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n", 1532 fdu, (u_long)bp->bio_blkno, bp->bio_bcount); 1533 bp->bio_error = EINVAL; 1534 bp->bio_flags |= BIO_ERROR; 1535 goto bad; 1536 } 1537 if ((bp->bio_bcount % fdblk) != 0) { 1538 bp->bio_error = EINVAL; 1539 bp->bio_flags |= BIO_ERROR; 1540 goto bad; 1541 } 1542 } 1543 1544 /* 1545 * Set up block calculations. 1546 */ 1547 if (bp->bio_blkno > 20000000) { 1548 /* 1549 * Reject unreasonably high block number, prevent the 1550 * multiplication below from overflowing. 1551 */ 1552 bp->bio_error = EINVAL; 1553 bp->bio_flags |= BIO_ERROR; 1554 goto bad; 1555 } 1556 blknum = (unsigned) bp->bio_blkno * DEV_BSIZE/fdblk; 1557 nblocks = fd->ft->size; 1558 bp->bio_resid = 0; 1559 if (blknum + (bp->bio_bcount / fdblk) > nblocks) { 1560 if (blknum <= nblocks) { 1561 cando = (nblocks - blknum) * fdblk; 1562 bp->bio_resid = bp->bio_bcount - cando; 1563 if (cando == 0) 1564 goto bad; /* not actually bad but EOF */ 1565 } else { 1566 bp->bio_error = EINVAL; 1567 bp->bio_flags |= BIO_ERROR; 1568 goto bad; 1569 } 1570 } 1571 bp->bio_pblkno = bp->bio_blkno; 1572 s = splbio(); 1573 bioqdisksort(&fdc->head, bp); 1574 untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */ 1575 1576 /* Tell devstat we are starting on the transaction */ 1577 devstat_start_transaction(&fd->device_stats); 1578 device_busy(fd->dev); 1579 1580 fdstart(fdc); 1581 splx(s); 1582 return; 1583 1584bad: 1585 biodone(bp); 1586} 1587 1588/***************************************************************\ 1589* fdstart * 1590* We have just queued something.. if the controller is not busy * 1591* then simulate the case where it has just finished a command * 1592* So that it (the interrupt routine) looks on the queue for more* 1593* work to do and picks up what we just added. * 1594* If the controller is already busy, we need do nothing, as it * 1595* will pick up our work when the present work completes * 1596\***************************************************************/ 1597static void 1598fdstart(struct fdc_data *fdc) 1599{ 1600 int s; 1601 1602 s = splbio(); 1603 if(fdc->state == DEVIDLE) 1604 { 1605 fdc_intr(fdc); 1606 } 1607 splx(s); 1608} 1609 1610static void 1611fd_iotimeout(void *xfdc) 1612{ 1613 fdc_p fdc; 1614 int s; 1615 1616 fdc = xfdc; 1617 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1618 1619 /* 1620 * Due to IBM's brain-dead design, the FDC has a faked ready 1621 * signal, hardwired to ready == true. Thus, any command 1622 * issued if there's no diskette in the drive will _never_ 1623 * complete, and must be aborted by resetting the FDC. 1624 * Many thanks, Big Blue! 1625 * The FDC must not be reset directly, since that would 1626 * interfere with the state machine. Instead, pretend that 1627 * the command completed but was invalid. The state machine 1628 * will reset the FDC and retry once. 1629 */ 1630 s = splbio(); 1631 fdc->status[0] = NE7_ST0_IC_IV; 1632 fdc->flags &= ~FDC_STAT_VALID; 1633 fdc->state = IOTIMEDOUT; 1634 fdc_intr(fdc); 1635 splx(s); 1636} 1637 1638/* just ensure it has the right spl */ 1639static void 1640fd_pseudointr(void *xfdc) 1641{ 1642 int s; 1643 1644 s = splbio(); 1645 fdc_intr(xfdc); 1646 splx(s); 1647} 1648 1649/***********************************************************************\ 1650* fdintr * 1651* keep calling the state machine until it returns a 0 * 1652* ALWAYS called at SPLBIO * 1653\***********************************************************************/ 1654static void 1655fdc_intr(void *xfdc) 1656{ 1657 fdc_p fdc = xfdc; 1658 while(fdstate(fdc)) 1659 ; 1660} 1661 1662/* 1663 * magic pseudo-DMA initialization for YE FDC. Sets count and 1664 * direction 1665 */ 1666#define SET_BCDR(fdc,wr,cnt,port) \ 1667 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1668 ((cnt)-1) & 0xff); \ 1669 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1670 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1671 1672/* 1673 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy 1674 */ 1675static int fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count) 1676{ 1677 u_char *cptr = (u_char *)addr; 1678 1679 if (flags == BIO_READ) { 1680 if (fdc->state != PIOREAD) { 1681 fdc->state = PIOREAD; 1682 return(0); 1683 }; 1684 SET_BCDR(fdc, 0, count, 0); 1685 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1686 FDC_YE_DATAPORT, cptr, count); 1687 } else { 1688 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1689 FDC_YE_DATAPORT, cptr, count); 1690 SET_BCDR(fdc, 0, count, 0); 1691 }; 1692 return(1); 1693} 1694 1695/***********************************************************************\ 1696* The controller state machine. * 1697* if it returns a non zero value, it should be called again immediatly * 1698\***********************************************************************/ 1699static int 1700fdstate(fdc_p fdc) 1701{ 1702 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3, idf; 1703 unsigned blknum = 0, b_cylinder = 0; 1704 fdu_t fdu = fdc->fdu; 1705 fd_p fd; 1706 register struct bio *bp; 1707 struct fd_formb *finfo = NULL; 1708 size_t fdblk; 1709 1710 bp = fdc->bp; 1711 if (bp == NULL) { 1712 bp = bioq_first(&fdc->head); 1713 if (bp != NULL) { 1714 bioq_remove(&fdc->head, bp); 1715 fdc->bp = bp; 1716 } 1717 } 1718 if (bp == NULL) { 1719 /***********************************************\ 1720 * nothing left for this controller to do * 1721 * Force into the IDLE state, * 1722 \***********************************************/ 1723 fdc->state = DEVIDLE; 1724 if (fdc->fd) { 1725 device_printf(fdc->fdc_dev, 1726 "unexpected valid fd pointer\n"); 1727 fdc->fd = (fd_p) 0; 1728 fdc->fdu = -1; 1729 } 1730 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1731 return (0); 1732 } 1733 fdu = FDUNIT(minor(bp->bio_dev)); 1734 fd = devclass_get_softc(fd_devclass, fdu); 1735 fdblk = 128 << fd->ft->secsize; 1736 if (fdc->fd && (fd != fdc->fd)) 1737 device_printf(fd->dev, "confused fd pointers\n"); 1738 read = bp->bio_cmd == BIO_READ; 1739 if (read) 1740 idf = ISADMA_READ; 1741 else 1742 idf = ISADMA_WRITE; 1743 format = bp->bio_cmd & BIO_FORMAT; 1744 if (format) { 1745 finfo = (struct fd_formb *)bp->bio_data; 1746 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 1747 - (char *)finfo; 1748 } 1749 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) { 1750 blknum = (unsigned) bp->bio_pblkno * DEV_BSIZE/fdblk + 1751 fd->skip/fdblk; 1752 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 1753 } 1754 TRACE1("fd%d", fdu); 1755 TRACE1("[%s]", fdstates[fdc->state]); 1756 TRACE1("(0x%x)", fd->flags); 1757 untimeout(fd_turnoff, fd, fd->toffhandle); 1758 fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz); 1759 switch (fdc->state) 1760 { 1761 case DEVIDLE: 1762 case FINDWORK: /* we have found new work */ 1763 fdc->retry = 0; 1764 fd->skip = 0; 1765 fdc->fd = fd; 1766 fdc->fdu = fdu; 1767 fdc->fdctl_wr(fdc, fd->ft->trans); 1768 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 1769 /*******************************************************\ 1770 * If the next drive has a motor startup pending, then * 1771 * it will start up in its own good time * 1772 \*******************************************************/ 1773 if(fd->flags & FD_MOTOR_WAIT) { 1774 fdc->state = MOTORWAIT; 1775 return (0); /* come back later */ 1776 } 1777 /*******************************************************\ 1778 * Maybe if it's not starting, it SHOULD be starting * 1779 \*******************************************************/ 1780 if (!(fd->flags & FD_MOTOR)) 1781 { 1782 fdc->state = MOTORWAIT; 1783 fd_turnon(fd); 1784 return (0); 1785 } 1786 else /* at least make sure we are selected */ 1787 { 1788 set_motor(fdc, fd->fdsu, TURNON); 1789 } 1790 if (fdc->flags & FDC_NEEDS_RESET) { 1791 fdc->state = RESETCTLR; 1792 fdc->flags &= ~FDC_NEEDS_RESET; 1793 } else 1794 fdc->state = DOSEEK; 1795 break; 1796 case DOSEEK: 1797 if (b_cylinder == (unsigned)fd->track) 1798 { 1799 fdc->state = SEEKCOMPLETE; 1800 break; 1801 } 1802 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 1803 fd->fdsu, b_cylinder * fd->ft->steptrac, 1804 0)) 1805 { 1806 /* 1807 * seek command not accepted, looks like 1808 * the FDC went off to the Saints... 1809 */ 1810 fdc->retry = 6; /* try a reset */ 1811 return(retrier(fdc)); 1812 } 1813 fd->track = FD_NO_TRACK; 1814 fdc->state = SEEKWAIT; 1815 return(0); /* will return later */ 1816 case SEEKWAIT: 1817 /* allow heads to settle */ 1818 timeout(fd_pseudointr, fdc, hz / 16); 1819 fdc->state = SEEKCOMPLETE; 1820 return(0); /* will return later */ 1821 case SEEKCOMPLETE : /* SEEK DONE, START DMA */ 1822 /* Make sure seek really happened*/ 1823 if(fd->track == FD_NO_TRACK) { 1824 int descyl = b_cylinder * fd->ft->steptrac; 1825 do { 1826 /* 1827 * This might be a "ready changed" interrupt, 1828 * which cannot really happen since the 1829 * RDY pin is hardwired to + 5 volts. This 1830 * generally indicates a "bouncing" intr 1831 * line, so do one of the following: 1832 * 1833 * When running on an enhanced FDC that is 1834 * known to not go stuck after responding 1835 * with INVALID, fetch all interrupt states 1836 * until seeing either an INVALID or a 1837 * real interrupt condition. 1838 * 1839 * When running on a dumb old NE765, give 1840 * up immediately. The controller will 1841 * provide up to four dummy RC interrupt 1842 * conditions right after reset (for the 1843 * corresponding four drives), so this is 1844 * our only chance to get notice that it 1845 * was not the FDC that caused the interrupt. 1846 */ 1847 if (fd_sense_int(fdc, &st0, &cyl) 1848 == FD_NOT_VALID) 1849 return 0; 1850 if(fdc->fdct == FDC_NE765 1851 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1852 return 0; /* hope for a real intr */ 1853 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1854 1855 if (0 == descyl) { 1856 int failed = 0; 1857 /* 1858 * seek to cyl 0 requested; make sure we are 1859 * really there 1860 */ 1861 if (fd_sense_drive_status(fdc, &st3)) 1862 failed = 1; 1863 if ((st3 & NE7_ST3_T0) == 0) { 1864 printf( 1865 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 1866 fdu, st3, NE7_ST3BITS); 1867 failed = 1; 1868 } 1869 1870 if (failed) { 1871 if(fdc->retry < 3) 1872 fdc->retry = 3; 1873 return (retrier(fdc)); 1874 } 1875 } 1876 1877 if (cyl != descyl) { 1878 printf( 1879 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 1880 fdu, descyl, cyl, st0); 1881 if (fdc->retry < 3) 1882 fdc->retry = 3; 1883 return (retrier(fdc)); 1884 } 1885 } 1886 1887 fd->track = b_cylinder; 1888 if (!(fdc->flags & FDC_NODMA)) 1889 isa_dmastart(idf, bp->bio_data+fd->skip, 1890 format ? bp->bio_bcount : fdblk, fdc->dmachan); 1891 sectrac = fd->ft->sectrac; 1892 sec = blknum % (sectrac * fd->ft->heads); 1893 head = sec / sectrac; 1894 sec = sec % sectrac + 1; 1895 fd->hddrv = ((head&1)<<2)+fdu; 1896 1897 if(format || !read) 1898 { 1899 /* make sure the drive is writable */ 1900 if(fd_sense_drive_status(fdc, &st3) != 0) 1901 { 1902 /* stuck controller? */ 1903 if (!(fdc->flags & FDC_NODMA)) 1904 isa_dmadone(idf, 1905 bp->bio_data + fd->skip, 1906 format ? bp->bio_bcount : fdblk, 1907 fdc->dmachan); 1908 fdc->retry = 6; /* reset the beast */ 1909 return (retrier(fdc)); 1910 } 1911 if(st3 & NE7_ST3_WP) 1912 { 1913 /* 1914 * XXX YES! this is ugly. 1915 * in order to force the current operation 1916 * to fail, we will have to fake an FDC 1917 * error - all error handling is done 1918 * by the retrier() 1919 */ 1920 fdc->status[0] = NE7_ST0_IC_AT; 1921 fdc->status[1] = NE7_ST1_NW; 1922 fdc->status[2] = 0; 1923 fdc->status[3] = fd->track; 1924 fdc->status[4] = head; 1925 fdc->status[5] = sec; 1926 fdc->retry = 8; /* break out immediately */ 1927 fdc->state = IOTIMEDOUT; /* not really... */ 1928 return (1); 1929 } 1930 } 1931 1932 if (format) { 1933 if (fdc->flags & FDC_NODMA) { 1934 /* 1935 * This seems to be necessary for 1936 * whatever obscure reason; if we omit 1937 * it, we end up filling the sector ID 1938 * fields of the newly formatted track 1939 * entirely with garbage, causing 1940 * `wrong cylinder' errors all over 1941 * the place when trying to read them 1942 * back. 1943 * 1944 * Umpf. 1945 */ 1946 SET_BCDR(fdc, 1, bp->bio_bcount, 0); 1947 1948 (void)fdcpio(fdc,bp->bio_cmd, 1949 bp->bio_data+fd->skip, 1950 bp->bio_bcount); 1951 1952 } 1953 /* formatting */ 1954 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu, 1955 finfo->fd_formb_secshift, 1956 finfo->fd_formb_nsecs, 1957 finfo->fd_formb_gaplen, 1958 finfo->fd_formb_fillbyte, 0)) { 1959 /* controller fell over */ 1960 if (!(fdc->flags & FDC_NODMA)) 1961 isa_dmadone(idf, 1962 bp->bio_data + fd->skip, 1963 format ? bp->bio_bcount : fdblk, 1964 fdc->dmachan); 1965 fdc->retry = 6; 1966 return (retrier(fdc)); 1967 } 1968 } else { 1969 if (fdc->flags & FDC_NODMA) { 1970 /* 1971 * this seems to be necessary even when 1972 * reading data 1973 */ 1974 SET_BCDR(fdc, 1, fdblk, 0); 1975 1976 /* 1977 * perform the write pseudo-DMA before 1978 * the WRITE command is sent 1979 */ 1980 if (!read) 1981 (void)fdcpio(fdc,bp->bio_cmd, 1982 bp->bio_data+fd->skip, 1983 fdblk); 1984 } 1985 if (fd_cmd(fdc, 9, 1986 (read ? NE7CMD_READ : NE7CMD_WRITE), 1987 head << 2 | fdu, /* head & unit */ 1988 fd->track, /* track */ 1989 head, 1990 sec, /* sector + 1 */ 1991 fd->ft->secsize, /* sector size */ 1992 sectrac, /* sectors/track */ 1993 fd->ft->gap, /* gap size */ 1994 fd->ft->datalen, /* data length */ 1995 0)) { 1996 /* the beast is sleeping again */ 1997 if (!(fdc->flags & FDC_NODMA)) 1998 isa_dmadone(idf, 1999 bp->bio_data + fd->skip, 2000 format ? bp->bio_bcount : fdblk, 2001 fdc->dmachan); 2002 fdc->retry = 6; 2003 return (retrier(fdc)); 2004 } 2005 } 2006 if (fdc->flags & FDC_NODMA) 2007 /* 2008 * if this is a read, then simply await interrupt 2009 * before performing PIO 2010 */ 2011 if (read && !fdcpio(fdc,bp->bio_cmd, 2012 bp->bio_data+fd->skip,fdblk)) { 2013 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2014 return(0); /* will return later */ 2015 }; 2016 2017 /* 2018 * write (or format) operation will fall through and 2019 * await completion interrupt 2020 */ 2021 fdc->state = IOCOMPLETE; 2022 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2023 return (0); /* will return later */ 2024 case PIOREAD: 2025 /* 2026 * actually perform the PIO read. The IOCOMPLETE case 2027 * removes the timeout for us. 2028 */ 2029 (void)fdcpio(fdc,bp->bio_cmd,bp->bio_data+fd->skip,fdblk); 2030 fdc->state = IOCOMPLETE; 2031 /* FALLTHROUGH */ 2032 case IOCOMPLETE: /* IO DONE, post-analyze */ 2033 untimeout(fd_iotimeout, fdc, fd->tohandle); 2034 2035 if (fd_read_status(fdc, fd->fdsu)) { 2036 if (!(fdc->flags & FDC_NODMA)) 2037 isa_dmadone(idf, bp->bio_data + fd->skip, 2038 format ? bp->bio_bcount : fdblk, 2039 fdc->dmachan); 2040 if (fdc->retry < 6) 2041 fdc->retry = 6; /* force a reset */ 2042 return (retrier(fdc)); 2043 } 2044 2045 fdc->state = IOTIMEDOUT; 2046 2047 /* FALLTHROUGH */ 2048 2049 case IOTIMEDOUT: 2050 if (!(fdc->flags & FDC_NODMA)) 2051 isa_dmadone(idf, bp->bio_data + fd->skip, 2052 format ? bp->bio_bcount : fdblk, fdc->dmachan); 2053 if (fdc->status[0] & NE7_ST0_IC) { 2054 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2055 && fdc->status[1] & NE7_ST1_OR) { 2056 /* 2057 * DMA overrun. Someone hogged the bus 2058 * and didn't release it in time for the 2059 * next FDC transfer. 2060 * Just restart it, don't increment retry 2061 * count. (vak) 2062 */ 2063 fdc->state = SEEKCOMPLETE; 2064 return (1); 2065 } 2066 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 2067 && fdc->retry < 6) 2068 fdc->retry = 6; /* force a reset */ 2069 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2070 && fdc->status[2] & NE7_ST2_WC 2071 && fdc->retry < 3) 2072 fdc->retry = 3; /* force recalibrate */ 2073 return (retrier(fdc)); 2074 } 2075 /* All OK */ 2076 fd->skip += fdblk; 2077 if (!format && fd->skip < bp->bio_bcount - bp->bio_resid) { 2078 /* set up next transfer */ 2079 fdc->state = DOSEEK; 2080 } else { 2081 /* ALL DONE */ 2082 fd->skip = 0; 2083 fdc->bp = NULL; 2084 device_unbusy(fd->dev); 2085 devstat_end_transaction_bio(&fd->device_stats, bp); 2086 biodone(bp); 2087 fdc->fd = (fd_p) 0; 2088 fdc->fdu = -1; 2089 fdc->state = FINDWORK; 2090 } 2091 return (1); 2092 case RESETCTLR: 2093 fdc_reset(fdc); 2094 fdc->retry++; 2095 fdc->state = RESETCOMPLETE; 2096 return (0); 2097 case RESETCOMPLETE: 2098 /* 2099 * Discard all the results from the reset so that they 2100 * can't cause an unexpected interrupt later. 2101 */ 2102 for (i = 0; i < 4; i++) 2103 (void)fd_sense_int(fdc, &st0, &cyl); 2104 fdc->state = STARTRECAL; 2105 /* Fall through. */ 2106 case STARTRECAL: 2107 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 2108 /* arrgl */ 2109 fdc->retry = 6; 2110 return (retrier(fdc)); 2111 } 2112 fdc->state = RECALWAIT; 2113 return (0); /* will return later */ 2114 case RECALWAIT: 2115 /* allow heads to settle */ 2116 timeout(fd_pseudointr, fdc, hz / 8); 2117 fdc->state = RECALCOMPLETE; 2118 return (0); /* will return later */ 2119 case RECALCOMPLETE: 2120 do { 2121 /* 2122 * See SEEKCOMPLETE for a comment on this: 2123 */ 2124 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2125 return 0; 2126 if(fdc->fdct == FDC_NE765 2127 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2128 return 0; /* hope for a real intr */ 2129 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2130 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2131 { 2132 if(fdc->retry > 3) 2133 /* 2134 * a recalibrate from beyond cylinder 77 2135 * will "fail" due to the FDC limitations; 2136 * since people used to complain much about 2137 * the failure message, try not logging 2138 * this one if it seems to be the first 2139 * time in a line 2140 */ 2141 printf("fd%d: recal failed ST0 %b cyl %d\n", 2142 fdu, st0, NE7_ST0BITS, cyl); 2143 if(fdc->retry < 3) fdc->retry = 3; 2144 return (retrier(fdc)); 2145 } 2146 fd->track = 0; 2147 /* Seek (probably) necessary */ 2148 fdc->state = DOSEEK; 2149 return (1); /* will return immediatly */ 2150 case MOTORWAIT: 2151 if(fd->flags & FD_MOTOR_WAIT) 2152 { 2153 return (0); /* time's not up yet */ 2154 } 2155 if (fdc->flags & FDC_NEEDS_RESET) { 2156 fdc->state = RESETCTLR; 2157 fdc->flags &= ~FDC_NEEDS_RESET; 2158 } else { 2159 /* 2160 * If all motors were off, then the controller was 2161 * reset, so it has lost track of the current 2162 * cylinder. Recalibrate to handle this case. 2163 * But first, discard the results of the reset. 2164 */ 2165 fdc->state = RESETCOMPLETE; 2166 } 2167 return (1); /* will return immediatly */ 2168 default: 2169 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2170 if (fd_read_status(fdc, fd->fdsu) == 0) 2171 printf("FDC status :%x %x %x %x %x %x %x ", 2172 fdc->status[0], 2173 fdc->status[1], 2174 fdc->status[2], 2175 fdc->status[3], 2176 fdc->status[4], 2177 fdc->status[5], 2178 fdc->status[6] ); 2179 else 2180 printf("No status available "); 2181 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2182 { 2183 printf("[controller is dead now]\n"); 2184 return (0); 2185 } 2186 printf("ST0 = %x, PCN = %x\n", st0, cyl); 2187 return (0); 2188 } 2189 /*XXX confusing: some branches return immediately, others end up here*/ 2190 return (1); /* Come back immediatly to new state */ 2191} 2192 2193static int 2194retrier(struct fdc_data *fdc) 2195{ 2196 struct bio *bp; 2197 struct fd_data *fd; 2198 int fdu; 2199 2200 bp = fdc->bp; 2201 2202 /* XXX shouldn't this be cached somewhere? */ 2203 fdu = FDUNIT(minor(bp->bio_dev)); 2204 fd = devclass_get_softc(fd_devclass, fdu); 2205 if (fd->options & FDOPT_NORETRY) 2206 goto fail; 2207 2208 switch (fdc->retry) { 2209 case 0: case 1: case 2: 2210 fdc->state = SEEKCOMPLETE; 2211 break; 2212 case 3: case 4: case 5: 2213 fdc->state = STARTRECAL; 2214 break; 2215 case 6: 2216 fdc->state = RESETCTLR; 2217 break; 2218 case 7: 2219 break; 2220 default: 2221 fail: 2222 { 2223 dev_t sav_bio_dev = bp->bio_dev; 2224 /* Trick diskerr */ 2225 bp->bio_dev = makedev(major(bp->bio_dev), 2226 (FDUNIT(minor(bp->bio_dev))<<3)|RAW_PART); 2227 diskerr(bp, "hard error", fdc->fd->skip / DEV_BSIZE, 2228 (struct disklabel *)NULL); 2229 bp->bio_dev = sav_bio_dev; 2230 if (fdc->flags & FDC_STAT_VALID) 2231 { 2232 printf( 2233 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2234 fdc->status[0], NE7_ST0BITS, 2235 fdc->status[1], NE7_ST1BITS, 2236 fdc->status[2], NE7_ST2BITS, 2237 fdc->status[3], fdc->status[4], 2238 fdc->status[5]); 2239 } 2240 else 2241 printf(" (No status)\n"); 2242 } 2243 bp->bio_flags |= BIO_ERROR; 2244 bp->bio_error = EIO; 2245 bp->bio_resid += bp->bio_bcount - fdc->fd->skip; 2246 fdc->bp = NULL; 2247 fdc->fd->skip = 0; 2248 device_unbusy(fd->dev); 2249 devstat_end_transaction_bio(&fdc->fd->device_stats, bp); 2250 biodone(bp); 2251 fdc->state = FINDWORK; 2252 fdc->flags |= FDC_NEEDS_RESET; 2253 fdc->fd = (fd_p) 0; 2254 fdc->fdu = -1; 2255 return (1); 2256 } 2257 fdc->retry++; 2258 return (1); 2259} 2260 2261static void 2262fdbiodone(struct bio *bp) 2263{ 2264 wakeup(bp); 2265} 2266 2267static int 2268fdformat(dev, finfo, p) 2269 dev_t dev; 2270 struct fd_formb *finfo; 2271 struct proc *p; 2272{ 2273 fdu_t fdu; 2274 fd_p fd; 2275 2276 struct bio *bp; 2277 int rv = 0, s; 2278 size_t fdblk; 2279 2280 fdu = FDUNIT(minor(dev)); 2281 fd = devclass_get_softc(fd_devclass, fdu); 2282 fdblk = 128 << fd->ft->secsize; 2283 2284 /* set up a buffer header for fdstrategy() */ 2285 bp = (struct bio *)malloc(sizeof(struct bio), M_TEMP, M_NOWAIT); 2286 if(bp == 0) 2287 return ENOMEM; 2288 /* 2289 * keep the process from being swapped 2290 */ 2291 PHOLD(p); 2292 bzero((void *)bp, sizeof(*bp)); 2293 bp->bio_cmd = BIO_FORMAT; 2294 2295 /* 2296 * calculate a fake blkno, so fdstrategy() would initiate a 2297 * seek to the requested cylinder 2298 */ 2299 bp->bio_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads) 2300 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE; 2301 2302 bp->bio_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; 2303 bp->bio_data = (caddr_t)finfo; 2304 2305 /* now do the format */ 2306 bp->bio_dev = dev; 2307 bp->bio_done = fdbiodone; 2308 fdstrategy(bp); 2309 2310 /* ...and wait for it to complete */ 2311 s = splbio(); 2312 while(!(bp->bio_flags & BIO_DONE)) { 2313 rv = tsleep((caddr_t)bp, PRIBIO, "fdform", 20 * hz); 2314 if (rv == EWOULDBLOCK) 2315 break; 2316 } 2317 splx(s); 2318 2319 if (rv == EWOULDBLOCK) { 2320 /* timed out */ 2321 rv = EIO; 2322 device_unbusy(fd->dev); 2323 } 2324 if (bp->bio_flags & BIO_ERROR) 2325 rv = bp->bio_error; 2326 /* 2327 * allow the process to be swapped 2328 */ 2329 PRELE(p); 2330 free(bp, M_TEMP); 2331 return rv; 2332} 2333 2334/* 2335 * TODO: don't allocate buffer on stack. 2336 */ 2337 2338static int 2339fdioctl(dev, cmd, addr, flag, p) 2340 dev_t dev; 2341 u_long cmd; 2342 caddr_t addr; 2343 int flag; 2344 struct proc *p; 2345{ 2346 fdu_t fdu = FDUNIT(minor(dev)); 2347 fd_p fd = devclass_get_softc(fd_devclass, fdu); 2348 size_t fdblk; 2349 2350 struct fd_type *fdt; 2351 struct disklabel *dl; 2352 char buffer[DEV_BSIZE]; 2353 int error = 0; 2354 2355 fdblk = 128 << fd->ft->secsize; 2356 2357 switch (cmd) { 2358 case DIOCGDINFO: 2359 bzero(buffer, sizeof (buffer)); 2360 dl = (struct disklabel *)buffer; 2361 dl->d_secsize = fdblk; 2362 fdt = fd->ft; 2363 dl->d_secpercyl = fdt->size / fdt->tracks; 2364 dl->d_type = DTYPE_FLOPPY; 2365 2366 if (readdisklabel(dkmodpart(dev, RAW_PART), dl) 2367 == NULL) 2368 error = 0; 2369 else 2370 error = EINVAL; 2371 2372 *(struct disklabel *)addr = *dl; 2373 break; 2374 2375 case DIOCSDINFO: 2376 if ((flag & FWRITE) == 0) 2377 error = EBADF; 2378 break; 2379 2380 case DIOCWLABEL: 2381 if ((flag & FWRITE) == 0) 2382 error = EBADF; 2383 break; 2384 2385 case DIOCWDINFO: 2386 if ((flag & FWRITE) == 0) { 2387 error = EBADF; 2388 break; 2389 } 2390 2391 dl = (struct disklabel *)addr; 2392 2393 if ((error = setdisklabel((struct disklabel *)buffer, dl, 2394 (u_long)0)) != 0) 2395 break; 2396 2397 error = writedisklabel(dev, (struct disklabel *)buffer); 2398 break; 2399 case FD_FORM: 2400 if ((flag & FWRITE) == 0) 2401 error = EBADF; /* must be opened for writing */ 2402 else if (((struct fd_formb *)addr)->format_version != 2403 FD_FORMAT_VERSION) 2404 error = EINVAL; /* wrong version of formatting prog */ 2405 else 2406 error = fdformat(dev, (struct fd_formb *)addr, p); 2407 break; 2408 2409 case FD_GTYPE: /* get drive type */ 2410 *(struct fd_type *)addr = *fd->ft; 2411 break; 2412 2413 case FD_STYPE: /* set drive type */ 2414 /* this is considered harmful; only allow for superuser */ 2415 if (suser(p) != 0) 2416 return EPERM; 2417 *fd->ft = *(struct fd_type *)addr; 2418 break; 2419 2420 case FD_GOPTS: /* get drive options */ 2421 *(int *)addr = fd->options; 2422 break; 2423 2424 case FD_SOPTS: /* set drive options */ 2425 fd->options = *(int *)addr; 2426 break; 2427 2428 default: 2429 error = ENOTTY; 2430 break; 2431 } 2432 return (error); 2433} 2434 2435/* 2436 * Hello emacs, these are the 2437 * Local Variables: 2438 * c-indent-level: 8 2439 * c-continued-statement-offset: 8 2440 * c-continued-brace-offset: 0 2441 * c-brace-offset: -8 2442 * c-brace-imaginary-offset: 0 2443 * c-argdecl-indent: 8 2444 * c-label-offset: -8 2445 * c++-hanging-braces: 1 2446 * c++-access-specifier-offset: -8 2447 * c++-empty-arglist-indent: 8 2448 * c++-friend-offset: 0 2449 * End: 2450 */ 2451