fdc.c revision 79487
1189251Ssam/* 2189251Ssam * Copyright (c) 1990 The Regents of the University of California. 3189251Ssam * All rights reserved. 4189251Ssam * 5252726Srpaulo * This code is derived from software contributed to Berkeley by 6252726Srpaulo * Don Ahn. 7189251Ssam * 8189251Ssam * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu) 9189251Ssam * aided by the Linux floppy driver modifications from David Bateman 10189251Ssam * (dbateman@eng.uts.edu.au). 11189251Ssam * 12189251Ssam * Copyright (c) 1993, 1994 by 13189251Ssam * jc@irbs.UUCP (John Capo) 14189251Ssam * vak@zebub.msk.su (Serge Vakulenko) 15189251Ssam * ache@astral.msk.su (Andrew A. Chernov) 16189251Ssam * 17189251Ssam * Copyright (c) 1993, 1994, 1995 by 18189251Ssam * joerg_wunsch@uriah.sax.de (Joerg Wunsch) 19189251Ssam * dufault@hda.com (Peter Dufault) 20189251Ssam * 21189251Ssam * Copyright (c) 2001 Joerg Wunsch, 22189251Ssam * joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) 23189251Ssam * 24189251Ssam * Redistribution and use in source and binary forms, with or without 25189251Ssam * modification, are permitted provided that the following conditions 26189251Ssam * are met: 27189251Ssam * 1. Redistributions of source code must retain the above copyright 28189251Ssam * notice, this list of conditions and the following disclaimer. 29189251Ssam * 2. Redistributions in binary form must reproduce the above copyright 30189251Ssam * notice, this list of conditions and the following disclaimer in the 31189251Ssam * documentation and/or other materials provided with the distribution. 32189251Ssam * 3. All advertising materials mentioning features or use of this software 33189251Ssam * must display the following acknowledgement: 34189251Ssam * This product includes software developed by the University of 35189251Ssam * California, Berkeley and its contributors. 36189251Ssam * 4. Neither the name of the University nor the names of its contributors 37189251Ssam * may be used to endorse or promote products derived from this software 38189251Ssam * without specific prior written permission. 39189251Ssam * 40189251Ssam * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 41189251Ssam * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42189251Ssam * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43189251Ssam * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 44189251Ssam * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45189251Ssam * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46189251Ssam * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47189251Ssam * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48189251Ssam * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49189251Ssam * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50189251Ssam * SUCH DAMAGE. 51 * 52 * from: @(#)fd.c 7.4 (Berkeley) 5/25/91 53 * $FreeBSD: head/sys/dev/fdc/fdc.c 79487 2001-07-09 20:46:45Z 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 * Stop retrying after this many DMA overruns. Since each retry takes 102 * one revolution, with 300 rpm., 25 retries take approximately 10 103 * seconds which the read attempt will block in case the DMA overrun 104 * is persistent. 105 */ 106#define FDC_DMAOV_MAX 25 107 108#define NUMTYPES 17 109#define NUMDENS (NUMTYPES - 7) 110 111#define NO_TYPE 0 /* must match NO_TYPE in ft.c */ 112#define FD_1720 1 113#define FD_1480 2 114#define FD_1440 3 115#define FD_1200 4 116#define FD_820 5 117#define FD_800 6 118#define FD_720 7 119#define FD_360 8 120#define FD_640 9 121#define FD_1232 10 122 123#define FD_1480in5_25 11 124#define FD_1440in5_25 12 125#define FD_820in5_25 13 126#define FD_800in5_25 14 127#define FD_720in5_25 15 128#define FD_360in5_25 16 129#define FD_640in5_25 17 130 131#define BIO_RDSECTID BIO_CMD1 132 133static struct fd_type fd_types[NUMTYPES] = 134{ 135{ 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */ 136{ 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */ 137{ 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */ 138{ 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */ 139{ 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */ 140{ 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */ 141{ 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */ 142{ 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */ 143{ 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */ 144{ 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */ 145 146{ 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */ 147{ 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */ 148{ 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */ 149{ 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */ 150{ 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */ 151{ 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */ 152{ 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */ 153}; 154 155#define DRVS_PER_CTLR 2 /* 2 floppies */ 156 157#define MAX_SEC_SIZE (128 << 3) 158#define MAX_CYLINDER 85 /* some people really stress their drives 159 * up to cyl 82 */ 160#define MAX_HEAD 1 161 162/***********************************************************************\ 163* Per controller structure. * 164\***********************************************************************/ 165static devclass_t fdc_devclass; 166 167/***********************************************************************\ 168* Per drive structure. * 169* N per controller (DRVS_PER_CTLR) * 170\***********************************************************************/ 171struct fd_data { 172 struct fdc_data *fdc; /* pointer to controller structure */ 173 int fdsu; /* this units number on this controller */ 174 int type; /* Drive type (FD_1440...) */ 175 struct fd_type *ft; /* pointer to the type descriptor */ 176 int flags; 177#define FD_OPEN 0x01 /* it's open */ 178#define FD_ACTIVE 0x02 /* it's active */ 179#define FD_MOTOR 0x04 /* motor should be on */ 180#define FD_MOTOR_WAIT 0x08 /* motor coming up */ 181 int skip; 182 int hddrv; 183#define FD_NO_TRACK -2 184 int track; /* where we think the head is */ 185 int options; /* user configurable options, see ioctl_fd.h */ 186 struct callout_handle toffhandle; 187 struct callout_handle tohandle; 188 struct devstat device_stats; 189 eventhandler_tag clonetag; 190 dev_t masterdev; 191#define NCLONEDEVS 10 /* must match the table below */ 192 dev_t clonedevs[NCLONEDEVS]; 193 device_t dev; 194 fdu_t fdu; 195}; 196 197struct fdc_ivars { 198 int fdunit; 199}; 200static devclass_t fd_devclass; 201 202/***********************************************************************\ 203* Throughout this file the following conventions will be used: * 204* fd is a pointer to the fd_data struct for the drive in question * 205* fdc is a pointer to the fdc_data struct for the controller * 206* fdu is the floppy drive unit number * 207* fdcu is the floppy controller unit number * 208* fdsu is the floppy drive unit number on that controller. (sub-unit) * 209\***********************************************************************/ 210 211/* internal functions */ 212static driver_intr_t fdc_intr; 213static void set_motor(struct fdc_data *, int, int); 214# define TURNON 1 215# define TURNOFF 0 216static timeout_t fd_turnoff; 217static timeout_t fd_motor_on; 218static void fd_turnon(struct fd_data *); 219static void fdc_reset(fdc_p); 220static int fd_in(struct fdc_data *, int *); 221static int out_fdc(struct fdc_data *, int); 222static void fdstart(struct fdc_data *); 223static timeout_t fd_iotimeout; 224static timeout_t fd_pseudointr; 225static int fdstate(struct fdc_data *); 226static int retrier(struct fdc_data *); 227static int fdmisccmd(dev_t, u_int, void *); 228 229static int enable_fifo(fdc_p fdc); 230static void fd_clone (void *arg, char *name, int namelen, dev_t *dev); 231 232static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 233 234#ifdef FDC_DEBUG 235static char const * const fdstates[] = 236{ 237"DEVIDLE", 238"FINDWORK", 239"DOSEEK", 240"SEEKCOMPLETE", 241"IOCOMPLETE", 242"RECALCOMPLETE", 243"STARTRECAL", 244"RESETCTLR", 245"SEEKWAIT", 246"RECALWAIT", 247"MOTORWAIT", 248"IOTIMEDOUT", 249"RESETCOMPLETE", 250"PIOREAD", 251}; 252 253/* CAUTION: fd_debug causes huge amounts of logging output */ 254static int volatile fd_debug = 0; 255#define TRACE0(arg) if(fd_debug) printf(arg) 256#define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2) 257#else /* FDC_DEBUG */ 258#define TRACE0(arg) 259#define TRACE1(arg1, arg2) 260#endif /* FDC_DEBUG */ 261 262static void 263fdout_wr(fdc_p fdc, u_int8_t v) 264{ 265 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 266} 267 268static u_int8_t 269fdsts_rd(fdc_p fdc) 270{ 271 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 272} 273 274static void 275fddata_wr(fdc_p fdc, u_int8_t v) 276{ 277 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 278} 279 280static u_int8_t 281fddata_rd(fdc_p fdc) 282{ 283 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 284} 285 286static void 287fdctl_wr_isa(fdc_p fdc, u_int8_t v) 288{ 289 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 290} 291 292#if NCARD > 0 293static void 294fdctl_wr_pcmcia(fdc_p fdc, u_int8_t v) 295{ 296 bus_space_write_1(fdc->portt, fdc->porth, FDCTL+fdc->port_off, v); 297} 298#endif 299 300#if 0 301 302static u_int8_t 303fdin_rd(fdc_p fdc) 304{ 305 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 306} 307 308#endif 309 310/* 311 * The open function is named Fdopen() to avoid confusion with fdopen() 312 * in fd(4). The difference is now only meaningful for debuggers. 313 */ 314static d_open_t Fdopen; 315static d_close_t fdclose; 316static d_ioctl_t fdioctl; 317static d_strategy_t fdstrategy; 318 319#define CDEV_MAJOR 9 320static struct cdevsw fd_cdevsw = { 321 /* open */ Fdopen, 322 /* close */ fdclose, 323 /* read */ physread, 324 /* write */ physwrite, 325 /* ioctl */ fdioctl, 326 /* poll */ nopoll, 327 /* mmap */ nommap, 328 /* strategy */ fdstrategy, 329 /* name */ "fd", 330 /* maj */ CDEV_MAJOR, 331 /* dump */ nodump, 332 /* psize */ nopsize, 333 /* flags */ D_DISK, 334}; 335 336static int 337fdc_err(struct fdc_data *fdc, const char *s) 338{ 339 fdc->fdc_errs++; 340 if (s) { 341 if (fdc->fdc_errs < FDC_ERRMAX) 342 device_printf(fdc->fdc_dev, "%s", s); 343 else if (fdc->fdc_errs == FDC_ERRMAX) 344 device_printf(fdc->fdc_dev, "too many errors, not " 345 "logging any more\n"); 346 } 347 348 return FD_FAILED; 349} 350 351/* 352 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 353 * Unit number, 354 * # of output bytes, output bytes as ints ..., 355 * # of input bytes, input bytes as ints ... 356 */ 357static int 358fd_cmd(struct fdc_data *fdc, int n_out, ...) 359{ 360 u_char cmd; 361 int n_in; 362 int n; 363 va_list ap; 364 365 va_start(ap, n_out); 366 cmd = (u_char)(va_arg(ap, int)); 367 va_end(ap); 368 va_start(ap, n_out); 369 for (n = 0; n < n_out; n++) 370 { 371 if (out_fdc(fdc, va_arg(ap, int)) < 0) 372 { 373 char msg[50]; 374 snprintf(msg, sizeof(msg), 375 "cmd %x failed at out byte %d of %d\n", 376 cmd, n + 1, n_out); 377 return fdc_err(fdc, msg); 378 } 379 } 380 n_in = va_arg(ap, int); 381 for (n = 0; n < n_in; n++) 382 { 383 int *ptr = va_arg(ap, int *); 384 if (fd_in(fdc, ptr) < 0) 385 { 386 char msg[50]; 387 snprintf(msg, sizeof(msg), 388 "cmd %02x failed at in byte %d of %d\n", 389 cmd, n + 1, n_in); 390 return fdc_err(fdc, msg); 391 } 392 } 393 394 return 0; 395} 396 397static int 398enable_fifo(fdc_p fdc) 399{ 400 int i, j; 401 402 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 403 404 /* 405 * Cannot use fd_cmd the normal way here, since 406 * this might be an invalid command. Thus we send the 407 * first byte, and check for an early turn of data directon. 408 */ 409 410 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 411 return fdc_err(fdc, "Enable FIFO failed\n"); 412 413 /* If command is invalid, return */ 414 j = 100000; 415 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 416 != NE7_RQM && j-- > 0) 417 if (i == (NE7_DIO | NE7_RQM)) { 418 fdc_reset(fdc); 419 return FD_FAILED; 420 } 421 if (j<0 || 422 fd_cmd(fdc, 3, 423 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 424 fdc_reset(fdc); 425 return fdc_err(fdc, "Enable FIFO failed\n"); 426 } 427 fdc->flags |= FDC_HAS_FIFO; 428 return 0; 429 } 430 if (fd_cmd(fdc, 4, 431 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 432 return fdc_err(fdc, "Re-enable FIFO failed\n"); 433 return 0; 434} 435 436static int 437fd_sense_drive_status(fdc_p fdc, int *st3p) 438{ 439 int st3; 440 441 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 442 { 443 return fdc_err(fdc, "Sense Drive Status failed\n"); 444 } 445 if (st3p) 446 *st3p = st3; 447 448 return 0; 449} 450 451static int 452fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 453{ 454 int cyl, st0, ret; 455 456 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 457 if (ret) { 458 (void)fdc_err(fdc, 459 "sense intr err reading stat reg 0\n"); 460 return ret; 461 } 462 463 if (st0p) 464 *st0p = st0; 465 466 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 467 /* 468 * There doesn't seem to have been an interrupt. 469 */ 470 return FD_NOT_VALID; 471 } 472 473 if (fd_in(fdc, &cyl) < 0) { 474 return fdc_err(fdc, "can't get cyl num\n"); 475 } 476 477 if (cylp) 478 *cylp = cyl; 479 480 return 0; 481} 482 483 484static int 485fd_read_status(fdc_p fdc) 486{ 487 int i, ret; 488 489 for (i = 0; i < 7; i++) { 490 /* 491 * XXX types are poorly chosen. Only bytes can be read 492 * from the hardware, but fdc->status[] wants u_ints and 493 * fd_in() gives ints. 494 */ 495 int status; 496 497 ret = fd_in(fdc, &status); 498 fdc->status[i] = status; 499 if (ret != 0) 500 break; 501 } 502 503 if (ret == 0) 504 fdc->flags |= FDC_STAT_VALID; 505 else 506 fdc->flags &= ~FDC_STAT_VALID; 507 508 return ret; 509} 510 511/****************************************************************************/ 512/* autoconfiguration stuff */ 513/****************************************************************************/ 514 515static int 516fdc_alloc_resources(struct fdc_data *fdc) 517{ 518 device_t dev; 519 int ispnp, ispcmcia, nports; 520 521 dev = fdc->fdc_dev; 522 ispnp = (fdc->flags & FDC_ISPNP) != 0; 523 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 524 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 525 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 526 527 /* 528 * On standard ISA, we don't just use an 8 port range 529 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 530 * register at 0x3f6. 531 * 532 * Isn't PC hardware wonderful. 533 * 534 * The Y-E Data PCMCIA FDC doesn't have this problem, it 535 * uses the register with offset 6 for pseudo-DMA, and the 536 * one with offset 7 as control register. 537 */ 538 nports = ispcmcia ? 8 : (ispnp ? 1 : 6); 539 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 540 &fdc->rid_ioport, 0ul, ~0ul, 541 nports, RF_ACTIVE); 542 if (fdc->res_ioport == 0) { 543 device_printf(dev, "cannot reserve I/O port range (%d ports)\n", 544 nports); 545 return ENXIO; 546 } 547 fdc->portt = rman_get_bustag(fdc->res_ioport); 548 fdc->porth = rman_get_bushandle(fdc->res_ioport); 549 550 if (!ispcmcia) { 551 /* 552 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 553 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 554 * by checking the size and adjust the port address 555 * accordingly. 556 */ 557 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 558 fdc->port_off = -2; 559 560 /* 561 * Register the control port range as rid 1 if it 562 * isn't there already. Most PnP BIOSen will have 563 * already done this but non-PnP configurations don't. 564 * 565 * And some (!!) report 0x3f2-0x3f5 and completely 566 * leave out the control register! It seems that some 567 * non-antique controller chips have a different 568 * method of programming the transfer speed which 569 * doesn't require the control register, but it's 570 * mighty bogus as the chip still responds to the 571 * address for the control register. 572 */ 573 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 574 u_long ctlstart; 575 576 /* Find the control port, usually 0x3f7 */ 577 ctlstart = rman_get_start(fdc->res_ioport) + 578 fdc->port_off + 7; 579 580 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); 581 } 582 583 /* 584 * Now (finally!) allocate the control port. 585 */ 586 fdc->rid_ctl = 1; 587 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 588 &fdc->rid_ctl, 589 0ul, ~0ul, 1, RF_ACTIVE); 590 if (fdc->res_ctl == 0) { 591 device_printf(dev, 592 "cannot reserve control I/O port range (control port)\n"); 593 return ENXIO; 594 } 595 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 596 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 597 } 598 599 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 600 &fdc->rid_irq, 0ul, ~0ul, 1, 601 RF_ACTIVE); 602 if (fdc->res_irq == 0) { 603 device_printf(dev, "cannot reserve interrupt line\n"); 604 return ENXIO; 605 } 606 607 if ((fdc->flags & FDC_NODMA) == 0) { 608 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 609 &fdc->rid_drq, 0ul, ~0ul, 1, 610 RF_ACTIVE); 611 if (fdc->res_drq == 0) { 612 device_printf(dev, "cannot reserve DMA request line\n"); 613 return ENXIO; 614 } 615 fdc->dmachan = fdc->res_drq->r_start; 616 } 617 618 return 0; 619} 620 621static void 622fdc_release_resources(struct fdc_data *fdc) 623{ 624 device_t dev; 625 626 dev = fdc->fdc_dev; 627 if (fdc->res_irq != 0) { 628 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 629 fdc->res_irq); 630 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 631 fdc->res_irq); 632 } 633 if (fdc->res_ctl != 0) { 634 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 635 fdc->res_ctl); 636 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 637 fdc->res_ctl); 638 } 639 if (fdc->res_ioport != 0) { 640 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 641 fdc->res_ioport); 642 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 643 fdc->res_ioport); 644 } 645 if (fdc->res_drq != 0) { 646 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 647 fdc->res_drq); 648 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 649 fdc->res_drq); 650 } 651} 652 653/****************************************************************************/ 654/* autoconfiguration stuff */ 655/****************************************************************************/ 656 657static struct isa_pnp_id fdc_ids[] = { 658 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 659 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 660 {0} 661}; 662 663static int 664fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 665{ 666 struct fdc_ivars *ivars = device_get_ivars(child); 667 668 switch (which) { 669 case FDC_IVAR_FDUNIT: 670 *result = ivars->fdunit; 671 break; 672 default: 673 return ENOENT; 674 } 675 return 0; 676} 677 678/* 679 * fdc controller section. 680 */ 681static int 682fdc_probe(device_t dev) 683{ 684 int error, ic_type; 685 struct fdc_data *fdc; 686 687 fdc = device_get_softc(dev); 688 bzero(fdc, sizeof *fdc); 689 fdc->fdc_dev = dev; 690 fdc->fdctl_wr = fdctl_wr_isa; 691 692 /* Check pnp ids */ 693 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 694 if (error == ENXIO) 695 return ENXIO; 696 if (error == 0) 697 fdc->flags |= FDC_ISPNP; 698 699 /* Attempt to allocate our resources for the duration of the probe */ 700 error = fdc_alloc_resources(fdc); 701 if (error) 702 goto out; 703 704 /* First - lets reset the floppy controller */ 705 fdout_wr(fdc, 0); 706 DELAY(100); 707 fdout_wr(fdc, FDO_FRST); 708 709 /* see if it can handle a command */ 710 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 711 NE7_SPEC_2(2, 0), 0)) { 712 error = ENXIO; 713 goto out; 714 } 715 716 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 717 ic_type = (u_char)ic_type; 718 switch (ic_type) { 719 case 0x80: 720 device_set_desc(dev, "NEC 765 or clone"); 721 fdc->fdct = FDC_NE765; 722 break; 723 case 0x81: 724 device_set_desc(dev, "Intel 82077 or clone"); 725 fdc->fdct = FDC_I82077; 726 break; 727 case 0x90: 728 device_set_desc(dev, "NEC 72065B or clone"); 729 fdc->fdct = FDC_NE72065; 730 break; 731 default: 732 device_set_desc(dev, "generic floppy controller"); 733 fdc->fdct = FDC_UNKNOWN; 734 break; 735 } 736 } 737 738out: 739 fdc_release_resources(fdc); 740 return (error); 741} 742 743#if NCARD > 0 744 745static int 746fdc_pccard_probe(device_t dev) 747{ 748 int error; 749 struct fdc_data *fdc; 750 751 fdc = device_get_softc(dev); 752 bzero(fdc, sizeof *fdc); 753 fdc->fdc_dev = dev; 754 fdc->fdctl_wr = fdctl_wr_pcmcia; 755 756 fdc->flags |= FDC_ISPCMCIA | FDC_NODMA; 757 758 /* Attempt to allocate our resources for the duration of the probe */ 759 error = fdc_alloc_resources(fdc); 760 if (error) 761 goto out; 762 763 /* First - lets reset the floppy controller */ 764 fdout_wr(fdc, 0); 765 DELAY(100); 766 fdout_wr(fdc, FDO_FRST); 767 768 /* see if it can handle a command */ 769 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 770 NE7_SPEC_2(2, 0), 0)) { 771 error = ENXIO; 772 goto out; 773 } 774 775 device_set_desc(dev, "Y-E Data PCMCIA floppy"); 776 fdc->fdct = FDC_NE765; 777 778out: 779 fdc_release_resources(fdc); 780 return (error); 781} 782 783#endif /* NCARD > 0 */ 784 785static int 786fdc_detach(device_t dev) 787{ 788 struct fdc_data *fdc; 789 int error; 790 791 fdc = device_get_softc(dev); 792 793 /* have our children detached first */ 794 if ((error = bus_generic_detach(dev))) 795 return (error); 796 797 /* reset controller, turn motor off */ 798 fdout_wr(fdc, 0); 799 800 if ((fdc->flags & FDC_NODMA) == 0) 801 isa_dma_release(fdc->dmachan); 802 803 if ((fdc->flags & FDC_ATTACHED) == 0) { 804 device_printf(dev, "already unloaded\n"); 805 return (0); 806 } 807 fdc->flags &= ~FDC_ATTACHED; 808 809 BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq, 810 fdc->fdc_intr); 811 fdc_release_resources(fdc); 812 device_printf(dev, "unload\n"); 813 return (0); 814} 815 816/* 817 * Add a child device to the fdc controller. It will then be probed etc. 818 */ 819static void 820fdc_add_child(device_t dev, const char *name, int unit) 821{ 822 int disabled; 823 struct fdc_ivars *ivar; 824 device_t child; 825 826 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO); 827 if (ivar == NULL) 828 return; 829 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 830 ivar->fdunit = 0; 831 child = device_add_child(dev, name, unit); 832 if (child == NULL) 833 return; 834 device_set_ivars(child, ivar); 835 if (resource_int_value(name, unit, "disabled", &disabled) == 0 836 && disabled != 0) 837 device_disable(child); 838} 839 840static int 841fdc_attach(device_t dev) 842{ 843 struct fdc_data *fdc; 844 const char *name, *dname; 845 device_t *children; 846 int i, error, dunit, nchildren; 847 848 fdc = device_get_softc(dev); 849 error = fdc_alloc_resources(fdc); 850 if (error) { 851 device_printf(dev, "cannot re-acquire resources\n"); 852 return error; 853 } 854 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 855 INTR_TYPE_BIO | INTR_ENTROPY, fdc_intr, fdc, 856 &fdc->fdc_intr); 857 if (error) { 858 device_printf(dev, "cannot setup interrupt\n"); 859 return error; 860 } 861 fdc->fdcu = device_get_unit(dev); 862 fdc->flags |= FDC_ATTACHED | FDC_NEEDS_RESET; 863 864 if ((fdc->flags & FDC_NODMA) == 0) { 865 /* 866 * Acquire the DMA channel forever, the driver will do 867 * the rest 868 * XXX should integrate with rman 869 */ 870 isa_dma_acquire(fdc->dmachan); 871 isa_dmainit(fdc->dmachan, MAX_SEC_SIZE); 872 } 873 fdc->state = DEVIDLE; 874 875 /* reset controller, turn motor off, clear fdout mirror reg */ 876 fdout_wr(fdc, fdc->fdout = 0); 877 bioq_init(&fdc->head); 878 879 /* 880 * Probe and attach any children. We should probably detect 881 * devices from the BIOS unless overridden. 882 */ 883 name = device_get_nameunit(dev); 884 i = 0; 885 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) 886 fdc_add_child(dev, dname, dunit); 887 888 if ((error = bus_generic_attach(dev)) != 0) 889 return (error); 890 891 /* Now remove all children not successfully probed (if any). */ 892 if ((error = device_get_children(dev, &children, &nchildren)) != 0) 893 return (error); 894 for (i = 0; i < nchildren; i++) 895 if (!device_is_alive(children[i])) 896 device_delete_child(dev, children[i]); 897 898 return (0); 899} 900 901static int 902fdc_print_child(device_t me, device_t child) 903{ 904 int retval = 0; 905 906 retval += bus_print_child_header(me, child); 907 retval += printf(" on %s drive %d\n", device_get_nameunit(me), 908 fdc_get_fdunit(child)); 909 910 return (retval); 911} 912 913static device_method_t fdc_methods[] = { 914 /* Device interface */ 915 DEVMETHOD(device_probe, fdc_probe), 916 DEVMETHOD(device_attach, fdc_attach), 917 DEVMETHOD(device_detach, fdc_detach), 918 DEVMETHOD(device_shutdown, bus_generic_shutdown), 919 DEVMETHOD(device_suspend, bus_generic_suspend), 920 DEVMETHOD(device_resume, bus_generic_resume), 921 922 /* Bus interface */ 923 DEVMETHOD(bus_print_child, fdc_print_child), 924 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 925 /* Our children never use any other bus interface methods. */ 926 927 { 0, 0 } 928}; 929 930static driver_t fdc_driver = { 931 "fdc", 932 fdc_methods, 933 sizeof(struct fdc_data) 934}; 935 936DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 937 938#if NCARD > 0 939 940static device_method_t fdc_pccard_methods[] = { 941 /* Device interface */ 942 DEVMETHOD(device_probe, fdc_pccard_probe), 943 DEVMETHOD(device_attach, fdc_attach), 944 DEVMETHOD(device_detach, fdc_detach), 945 DEVMETHOD(device_shutdown, bus_generic_shutdown), 946 DEVMETHOD(device_suspend, bus_generic_suspend), 947 DEVMETHOD(device_resume, bus_generic_resume), 948 949 /* Bus interface */ 950 DEVMETHOD(bus_print_child, fdc_print_child), 951 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 952 /* Our children never use any other bus interface methods. */ 953 954 { 0, 0 } 955}; 956 957static driver_t fdc_pccard_driver = { 958 "fdc", 959 fdc_pccard_methods, 960 sizeof(struct fdc_data) 961}; 962 963DRIVER_MODULE(fdc, pccard, fdc_pccard_driver, fdc_devclass, 0, 0); 964 965#endif /* NCARD > 0 */ 966 967static struct { 968 char *match; 969 int minor; 970 int link; 971} fd_suffix[] = { 972 /* 973 * Genuine clone devices must come first, and their number must 974 * match NCLONEDEVS above. 975 */ 976 { ".1720", 1, 0 }, 977 { ".1480", 2, 0 }, 978 { ".1440", 3, 0 }, 979 { ".1200", 4, 0 }, 980 { ".820", 5, 0 }, 981 { ".800", 6, 0 }, 982 { ".720", 7, 0 }, 983 { ".360", 8, 0 }, 984 { ".640", 9, 0 }, 985 { ".1232", 10, 0 }, 986 { "a", 0, 1 }, 987 { "b", 0, 1 }, 988 { "c", 0, 1 }, 989 { "d", 0, 1 }, 990 { "e", 0, 1 }, 991 { "f", 0, 1 }, 992 { "g", 0, 1 }, 993 { "h", 0, 1 }, 994 { 0, 0 } 995}; 996static void 997fd_clone(void *arg, char *name, int namelen, dev_t *dev) 998{ 999 struct fd_data *fd; 1000 int u, d, i; 1001 char *n; 1002 1003 fd = (struct fd_data *)arg; 1004 if (*dev != NODEV) 1005 return; 1006 if (dev_stdclone(name, &n, "fd", &u) != 2) 1007 return; 1008 for (i = 0; ; i++) { 1009 if (fd_suffix[i].match == NULL) 1010 return; 1011 if (strcmp(n, fd_suffix[i].match)) 1012 continue; 1013 d = fd_suffix[i].minor; 1014 break; 1015 } 1016 if (fd_suffix[i].link == 0) { 1017 *dev = make_dev(&fd_cdevsw, (u << 6) + d, 1018 UID_ROOT, GID_OPERATOR, 0640, name); 1019 fd->clonedevs[i] = *dev; 1020 } else { 1021 *dev = make_dev_alias(fd->masterdev, name); 1022 } 1023} 1024 1025/******************************************************************/ 1026/* 1027 * devices attached to the controller section. 1028 */ 1029static int 1030fd_probe(device_t dev) 1031{ 1032 int i; 1033 u_int fdt, st0, st3; 1034 struct fd_data *fd; 1035 struct fdc_data *fdc; 1036 fdsu_t fdsu; 1037 static int fd_fifo = 0; 1038 1039 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 1040 fd = device_get_softc(dev); 1041 fdc = device_get_softc(device_get_parent(dev)); 1042 1043 bzero(fd, sizeof *fd); 1044 fd->dev = dev; 1045 fd->fdc = fdc; 1046 fd->fdsu = fdsu; 1047 fd->fdu = device_get_unit(dev); 1048 1049#ifdef __i386__ 1050 /* look up what bios thinks we have */ 1051 switch (fd->fdu) { 1052 case 0: 1053 if ((fdc->flags & FDC_ISPCMCIA)) 1054 fdt = RTCFDT_144M; 1055 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0) 1056 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED; 1057 else 1058 fdt = (rtcin(RTC_FDISKETTE) & 0xf0); 1059 break; 1060 case 1: 1061 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0); 1062 break; 1063 default: 1064 fdt = RTCFDT_NONE; 1065 break; 1066 } 1067#else 1068 fdt = RTCFDT_144M; /* XXX probably */ 1069#endif 1070 1071 /* is there a unit? */ 1072 if (fdt == RTCFDT_NONE) 1073 return (ENXIO); 1074 1075 /* select it */ 1076 set_motor(fdc, fdsu, TURNON); 1077 fdc_reset(fdc); /* XXX reset, then unreset, etc. */ 1078 DELAY(1000000); /* 1 sec */ 1079 1080 /* XXX This doesn't work before the first set_motor() */ 1081 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN 1082 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 1083 && enable_fifo(fdc) == 0) { 1084 device_printf(device_get_parent(dev), 1085 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 1086 } 1087 fd_fifo = 1; 1088 1089 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) 1090 && (st3 & NE7_ST3_T0)) { 1091 /* if at track 0, first seek inwards */ 1092 /* seek some steps: */ 1093 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0); 1094 DELAY(300000); /* ...wait a moment... */ 1095 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */ 1096 } 1097 1098 /* If we're at track 0 first seek inwards. */ 1099 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) { 1100 /* Seek some steps... */ 1101 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 1102 /* ...wait a moment... */ 1103 DELAY(300000); 1104 /* make ctrlr happy: */ 1105 fd_sense_int(fdc, 0, 0); 1106 } 1107 } 1108 1109 for (i = 0; i < 2; i++) { 1110 /* 1111 * we must recalibrate twice, just in case the 1112 * heads have been beyond cylinder 76, since most 1113 * FDCs still barf when attempting to recalibrate 1114 * more than 77 steps 1115 */ 1116 /* go back to 0: */ 1117 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 1118 /* a second being enough for full stroke seek*/ 1119 DELAY(i == 0 ? 1000000 : 300000); 1120 1121 /* anything responding? */ 1122 if (fd_sense_int(fdc, &st0, 0) == 0 && 1123 (st0 & NE7_ST0_EC) == 0) 1124 break; /* already probed succesfully */ 1125 } 1126 } 1127 1128 set_motor(fdc, fdsu, TURNOFF); 1129 1130 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */ 1131 return (ENXIO); 1132 1133 fd->track = FD_NO_TRACK; 1134 fd->fdc = fdc; 1135 fd->fdsu = fdsu; 1136 fd->options = 0; 1137 callout_handle_init(&fd->toffhandle); 1138 callout_handle_init(&fd->tohandle); 1139 1140 switch (fdt) { 1141 case RTCFDT_12M: 1142 device_set_desc(dev, "1200-KB 5.25\" drive"); 1143 fd->type = FD_1200; 1144 break; 1145 case RTCFDT_144M | RTCFDT_144M_PRETENDED: 1146 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive"); 1147 fdt = RTCFDT_144M; 1148 fd->type = FD_1440; 1149 case RTCFDT_144M: 1150 device_set_desc(dev, "1440-KB 3.5\" drive"); 1151 fd->type = FD_1440; 1152 break; 1153 case RTCFDT_288M: 1154 case RTCFDT_288M_1: 1155 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 1156 fd->type = FD_1440; 1157 break; 1158 case RTCFDT_360K: 1159 device_set_desc(dev, "360-KB 5.25\" drive"); 1160 fd->type = FD_360; 1161 break; 1162 case RTCFDT_720K: 1163 printf("720-KB 3.5\" drive"); 1164 fd->type = FD_720; 1165 break; 1166 default: 1167 return (ENXIO); 1168 } 1169 return (0); 1170} 1171 1172static int 1173fd_attach(device_t dev) 1174{ 1175 struct fd_data *fd; 1176 static int cdevsw_add_done; 1177 int i; 1178 1179 if (!cdevsw_add_done) { 1180 cdevsw_add(&fd_cdevsw); /* XXX */ 1181 cdevsw_add_done = 1; 1182 } 1183 fd = device_get_softc(dev); 1184 fd->clonetag = EVENTHANDLER_REGISTER(dev_clone, fd_clone, fd, 1000); 1185 fd->masterdev = make_dev(&fd_cdevsw, fd->fdu << 6, 1186 UID_ROOT, GID_OPERATOR, 0640, "fd%d", fd->fdu); 1187 for (i = 0; i < NCLONEDEVS; i++) 1188 fd->clonedevs[i] = NODEV; 1189 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1190 device_get_unit(dev), 0, DEVSTAT_NO_ORDERED_TAGS, 1191 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1192 DEVSTAT_PRIORITY_FD); 1193 return (0); 1194} 1195 1196static int 1197fd_detach(device_t dev) 1198{ 1199 struct fd_data *fd; 1200 int i; 1201 1202 fd = device_get_softc(dev); 1203 untimeout(fd_turnoff, fd, fd->toffhandle); 1204 devstat_remove_entry(&fd->device_stats); 1205 destroy_dev(fd->masterdev); 1206 for (i = 0; i < NCLONEDEVS; i++) 1207 if (fd->clonedevs[i] != NODEV) 1208 destroy_dev(fd->clonedevs[i]); 1209 cdevsw_remove(&fd_cdevsw); 1210 EVENTHANDLER_DEREGISTER(dev_clone, fd->clonetag); 1211 1212 return (0); 1213} 1214 1215static device_method_t fd_methods[] = { 1216 /* Device interface */ 1217 DEVMETHOD(device_probe, fd_probe), 1218 DEVMETHOD(device_attach, fd_attach), 1219 DEVMETHOD(device_detach, fd_detach), 1220 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1221 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1222 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1223 1224 { 0, 0 } 1225}; 1226 1227static driver_t fd_driver = { 1228 "fd", 1229 fd_methods, 1230 sizeof(struct fd_data) 1231}; 1232 1233DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1234 1235/****************************************************************************/ 1236/* motor control stuff */ 1237/* remember to not deselect the drive we're working on */ 1238/****************************************************************************/ 1239static void 1240set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1241{ 1242 int fdout; 1243 1244 fdout = fdc->fdout; 1245 if (turnon) { 1246 fdout &= ~FDO_FDSEL; 1247 fdout |= (FDO_MOEN0 << fdsu) | FDO_FDMAEN | FDO_FRST | fdsu; 1248 } else 1249 fdout &= ~(FDO_MOEN0 << fdsu); 1250 fdc->fdout = fdout; 1251 fdout_wr(fdc, fdout); 1252 TRACE1("[0x%x->FDOUT]", fdout); 1253} 1254 1255static void 1256fd_turnoff(void *xfd) 1257{ 1258 int s; 1259 fd_p fd = xfd; 1260 1261 TRACE1("[fd%d: turnoff]", fd->fdu); 1262 1263 s = splbio(); 1264 /* 1265 * Don't turn off the motor yet if the drive is active. 1266 * 1267 * If we got here, this could only mean we missed an interrupt. 1268 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1269 * after a controller reset. Just schedule a pseudo-interrupt 1270 * so the state machine gets re-entered. 1271 */ 1272 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1273 fdc_intr(fd->fdc); 1274 splx(s); 1275 return; 1276 } 1277 1278 fd->flags &= ~FD_MOTOR; 1279 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1280 splx(s); 1281} 1282 1283static void 1284fd_motor_on(void *xfd) 1285{ 1286 int s; 1287 fd_p fd = xfd; 1288 1289 s = splbio(); 1290 fd->flags &= ~FD_MOTOR_WAIT; 1291 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1292 { 1293 fdc_intr(fd->fdc); 1294 } 1295 splx(s); 1296} 1297 1298static void 1299fd_turnon(fd_p fd) 1300{ 1301 if(!(fd->flags & FD_MOTOR)) 1302 { 1303 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1304 set_motor(fd->fdc, fd->fdsu, TURNON); 1305 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */ 1306 } 1307} 1308 1309static void 1310fdc_reset(fdc_p fdc) 1311{ 1312 /* Try a reset, keep motor on */ 1313 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1314 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1315 DELAY(100); 1316 /* enable FDC, but defer interrupts a moment */ 1317 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1318 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1319 DELAY(100); 1320 fdout_wr(fdc, fdc->fdout); 1321 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1322 1323 /* XXX after a reset, silently believe the FDC will accept commands */ 1324 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1325 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1326 0); 1327 if (fdc->flags & FDC_HAS_FIFO) 1328 (void) enable_fifo(fdc); 1329} 1330 1331/****************************************************************************/ 1332/* fdc in/out */ 1333/****************************************************************************/ 1334static int 1335fd_in(struct fdc_data *fdc, int *ptr) 1336{ 1337 int i, j = 100000; 1338 while ((i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) 1339 != (NE7_DIO|NE7_RQM) && j-- > 0) 1340 if (i == NE7_RQM) 1341 return fdc_err(fdc, "ready for output in input\n"); 1342 if (j <= 0) 1343 return fdc_err(fdc, bootverbose? "input ready timeout\n": 0); 1344#ifdef FDC_DEBUG 1345 i = fddata_rd(fdc); 1346 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1347 *ptr = i; 1348 return 0; 1349#else /* !FDC_DEBUG */ 1350 i = fddata_rd(fdc); 1351 if (ptr) 1352 *ptr = i; 1353 return 0; 1354#endif /* FDC_DEBUG */ 1355} 1356 1357int 1358out_fdc(struct fdc_data *fdc, int x) 1359{ 1360 int i; 1361 1362 /* Check that the direction bit is set */ 1363 i = 100000; 1364 while ((fdsts_rd(fdc) & NE7_DIO) && i-- > 0); 1365 if (i <= 0) return fdc_err(fdc, "direction bit not set\n"); 1366 1367 /* Check that the floppy controller is ready for a command */ 1368 i = 100000; 1369 while ((fdsts_rd(fdc) & NE7_RQM) == 0 && i-- > 0); 1370 if (i <= 0) 1371 return fdc_err(fdc, bootverbose? "output ready timeout\n": 0); 1372 1373 /* Send the command and return */ 1374 fddata_wr(fdc, x); 1375 TRACE1("[0x%x->FDDATA]", x); 1376 return (0); 1377} 1378 1379/****************************************************************************/ 1380/* fdopen/fdclose */ 1381/****************************************************************************/ 1382int 1383Fdopen(dev_t dev, int flags, int mode, struct proc *p) 1384{ 1385 fdu_t fdu = FDUNIT(minor(dev)); 1386 int type = FDTYPE(minor(dev)); 1387 fd_p fd; 1388 fdc_p fdc; 1389 1390 /* check bounds */ 1391 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1392 return (ENXIO); 1393 fdc = fd->fdc; 1394 if ((fdc == NULL) || (fd->type == NO_TYPE)) 1395 return (ENXIO); 1396 if (type > NUMDENS) 1397 return (ENXIO); 1398 if (type == 0) 1399 type = fd->type; 1400 else { 1401 /* 1402 * For each type of basic drive, make sure we are trying 1403 * to open a type it can do, 1404 */ 1405 if (type != fd->type) { 1406 switch (fd->type) { 1407 case FD_360: 1408 return (ENXIO); 1409 case FD_720: 1410 if ( type != FD_820 1411 && type != FD_800 1412 && type != FD_640 1413 ) 1414 return (ENXIO); 1415 break; 1416 case FD_1200: 1417 switch (type) { 1418 case FD_1480: 1419 type = FD_1480in5_25; 1420 break; 1421 case FD_1440: 1422 type = FD_1440in5_25; 1423 break; 1424 case FD_1232: 1425 break; 1426 case FD_820: 1427 type = FD_820in5_25; 1428 break; 1429 case FD_800: 1430 type = FD_800in5_25; 1431 break; 1432 case FD_720: 1433 type = FD_720in5_25; 1434 break; 1435 case FD_640: 1436 type = FD_640in5_25; 1437 break; 1438 case FD_360: 1439 type = FD_360in5_25; 1440 break; 1441 default: 1442 return(ENXIO); 1443 } 1444 break; 1445 case FD_1440: 1446 if ( type != FD_1720 1447 && type != FD_1480 1448 && type != FD_1200 1449 && type != FD_820 1450 && type != FD_800 1451 && type != FD_720 1452 && type != FD_640 1453 ) 1454 return(ENXIO); 1455 break; 1456 } 1457 } 1458 } 1459 fd->ft = fd_types + type - 1; 1460 fd->flags |= FD_OPEN; 1461 /* 1462 * Clearing the DMA overrun counter at open time is a bit messy. 1463 * Since we're only managing one counter per controller, opening 1464 * the second drive could mess it up. Anyway, if the DMA overrun 1465 * condition is really persistent, it will eventually time out 1466 * still. OTOH, clearing it here will ensure we'll at least start 1467 * trying again after a previous (maybe even long ago) failure. 1468 * Also, this is merely a stop-gap measure only that should not 1469 * happen during normal operation, so we can tolerate it to be a 1470 * bit sloppy about this. 1471 */ 1472 fdc->dma_overruns = 0; 1473 1474 return 0; 1475} 1476 1477int 1478fdclose(dev_t dev, int flags, int mode, struct proc *p) 1479{ 1480 fdu_t fdu = FDUNIT(minor(dev)); 1481 struct fd_data *fd; 1482 1483 fd = devclass_get_softc(fd_devclass, fdu); 1484 fd->flags &= ~FD_OPEN; 1485 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR); 1486 1487 return (0); 1488} 1489 1490/****************************************************************************/ 1491/* fdstrategy */ 1492/****************************************************************************/ 1493void 1494fdstrategy(struct bio *bp) 1495{ 1496 long blknum, nblocks; 1497 int s; 1498 fdu_t fdu; 1499 fdc_p fdc; 1500 fd_p fd; 1501 size_t fdblk; 1502 1503 fdu = FDUNIT(minor(bp->bio_dev)); 1504 fd = devclass_get_softc(fd_devclass, fdu); 1505 if (fd == 0) 1506 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1507 (u_long)major(bp->bio_dev), (u_long)minor(bp->bio_dev)); 1508 fdc = fd->fdc; 1509 if (fd->type == NO_TYPE) { 1510 bp->bio_error = ENXIO; 1511 bp->bio_flags |= BIO_ERROR; 1512 goto bad; 1513 } 1514 fdblk = 128 << (fd->ft->secsize); 1515 if (bp->bio_cmd != BIO_FORMAT && bp->bio_cmd != BIO_RDSECTID) { 1516 if (bp->bio_blkno < 0) { 1517 printf( 1518 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n", 1519 fdu, (u_long)bp->bio_blkno, bp->bio_bcount); 1520 bp->bio_error = EINVAL; 1521 bp->bio_flags |= BIO_ERROR; 1522 goto bad; 1523 } 1524 if ((bp->bio_bcount % fdblk) != 0) { 1525 bp->bio_error = EINVAL; 1526 bp->bio_flags |= BIO_ERROR; 1527 goto bad; 1528 } 1529 } 1530 1531 /* 1532 * Set up block calculations. 1533 */ 1534 if (bp->bio_blkno > 20000000) { 1535 /* 1536 * Reject unreasonably high block number, prevent the 1537 * multiplication below from overflowing. 1538 */ 1539 bp->bio_error = EINVAL; 1540 bp->bio_flags |= BIO_ERROR; 1541 goto bad; 1542 } 1543 blknum = bp->bio_blkno * DEV_BSIZE / fdblk; 1544 nblocks = fd->ft->size; 1545 if (blknum + bp->bio_bcount / fdblk > nblocks) { 1546 if (blknum >= nblocks) { 1547 if (bp->bio_cmd == BIO_READ) 1548 bp->bio_resid = bp->bio_bcount; 1549 else { 1550 bp->bio_error = ENOSPC; 1551 bp->bio_flags |= BIO_ERROR; 1552 } 1553 goto bad; /* not always bad, but EOF */ 1554 } 1555 bp->bio_bcount = (nblocks - blknum) * fdblk; 1556 } 1557 bp->bio_pblkno = bp->bio_blkno; 1558 s = splbio(); 1559 bioqdisksort(&fdc->head, bp); 1560 untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */ 1561 devstat_start_transaction(&fd->device_stats); 1562 device_busy(fd->dev); 1563 fdstart(fdc); 1564 splx(s); 1565 return; 1566 1567bad: 1568 biodone(bp); 1569} 1570 1571/***************************************************************\ 1572* fdstart * 1573* We have just queued something.. if the controller is not busy * 1574* then simulate the case where it has just finished a command * 1575* So that it (the interrupt routine) looks on the queue for more* 1576* work to do and picks up what we just added. * 1577* If the controller is already busy, we need do nothing, as it * 1578* will pick up our work when the present work completes * 1579\***************************************************************/ 1580static void 1581fdstart(struct fdc_data *fdc) 1582{ 1583 int s; 1584 1585 s = splbio(); 1586 if(fdc->state == DEVIDLE) 1587 { 1588 fdc_intr(fdc); 1589 } 1590 splx(s); 1591} 1592 1593static void 1594fd_iotimeout(void *xfdc) 1595{ 1596 fdc_p fdc; 1597 int s; 1598 1599 fdc = xfdc; 1600 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1601 1602 /* 1603 * Due to IBM's brain-dead design, the FDC has a faked ready 1604 * signal, hardwired to ready == true. Thus, any command 1605 * issued if there's no diskette in the drive will _never_ 1606 * complete, and must be aborted by resetting the FDC. 1607 * Many thanks, Big Blue! 1608 * The FDC must not be reset directly, since that would 1609 * interfere with the state machine. Instead, pretend that 1610 * the command completed but was invalid. The state machine 1611 * will reset the FDC and retry once. 1612 */ 1613 s = splbio(); 1614 fdc->status[0] = NE7_ST0_IC_IV; 1615 fdc->flags &= ~FDC_STAT_VALID; 1616 fdc->state = IOTIMEDOUT; 1617 fdc_intr(fdc); 1618 splx(s); 1619} 1620 1621/* just ensure it has the right spl */ 1622static void 1623fd_pseudointr(void *xfdc) 1624{ 1625 int s; 1626 1627 s = splbio(); 1628 fdc_intr(xfdc); 1629 splx(s); 1630} 1631 1632/***********************************************************************\ 1633* fdc_intr * 1634* keep calling the state machine until it returns a 0 * 1635* ALWAYS called at SPLBIO * 1636\***********************************************************************/ 1637static void 1638fdc_intr(void *xfdc) 1639{ 1640 fdc_p fdc = xfdc; 1641 while(fdstate(fdc)) 1642 ; 1643} 1644 1645/* 1646 * magic pseudo-DMA initialization for YE FDC. Sets count and 1647 * direction 1648 */ 1649#define SET_BCDR(fdc,wr,cnt,port) \ 1650 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1651 ((cnt)-1) & 0xff); \ 1652 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1653 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1654 1655/* 1656 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy 1657 */ 1658static int 1659fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count) 1660{ 1661 u_char *cptr = (u_char *)addr; 1662 1663 if (flags == BIO_READ) { 1664 if (fdc->state != PIOREAD) { 1665 fdc->state = PIOREAD; 1666 return(0); 1667 } 1668 SET_BCDR(fdc, 0, count, 0); 1669 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1670 FDC_YE_DATAPORT, cptr, count); 1671 } else { 1672 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1673 FDC_YE_DATAPORT, cptr, count); 1674 SET_BCDR(fdc, 0, count, 0); 1675 } 1676 return(1); 1677} 1678 1679/***********************************************************************\ 1680* The controller state machine. * 1681* if it returns a non zero value, it should be called again immediatly * 1682\***********************************************************************/ 1683static int 1684fdstate(fdc_p fdc) 1685{ 1686 struct fdc_readid *idp; 1687 int read, format, rdsectid, cylinder, head, i, sec = 0, sectrac; 1688 int st0, cyl, st3, idf; 1689 unsigned long blknum; 1690 fdu_t fdu = fdc->fdu; 1691 fd_p fd; 1692 register struct bio *bp; 1693 struct fd_formb *finfo = NULL; 1694 size_t fdblk; 1695 1696 bp = fdc->bp; 1697 if (bp == NULL) { 1698 bp = bioq_first(&fdc->head); 1699 if (bp != NULL) { 1700 bioq_remove(&fdc->head, bp); 1701 fdc->bp = bp; 1702 } 1703 } 1704 if (bp == NULL) { 1705 /***********************************************\ 1706 * nothing left for this controller to do * 1707 * Force into the IDLE state, * 1708 \***********************************************/ 1709 fdc->state = DEVIDLE; 1710 if (fdc->fd) { 1711 device_printf(fdc->fdc_dev, 1712 "unexpected valid fd pointer\n"); 1713 fdc->fd = (fd_p) 0; 1714 fdc->fdu = -1; 1715 } 1716 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1717 return (0); 1718 } 1719 fdu = FDUNIT(minor(bp->bio_dev)); 1720 fd = devclass_get_softc(fd_devclass, fdu); 1721 fdblk = 128 << fd->ft->secsize; 1722 if (fdc->fd && (fd != fdc->fd)) 1723 device_printf(fd->dev, "confused fd pointers\n"); 1724 read = bp->bio_cmd == BIO_READ; 1725 if (read) 1726 idf = ISADMA_READ; 1727 else 1728 idf = ISADMA_WRITE; 1729 format = bp->bio_cmd == BIO_FORMAT; 1730 rdsectid = bp->bio_cmd == BIO_RDSECTID; 1731 if (format) 1732 finfo = (struct fd_formb *)bp->bio_data; 1733 TRACE1("fd%d", fdu); 1734 TRACE1("[%s]", fdstates[fdc->state]); 1735 TRACE1("(0x%x)", fd->flags); 1736 untimeout(fd_turnoff, fd, fd->toffhandle); 1737 fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz); 1738 switch (fdc->state) 1739 { 1740 case DEVIDLE: 1741 case FINDWORK: /* we have found new work */ 1742 fdc->retry = 0; 1743 fd->skip = 0; 1744 fdc->fd = fd; 1745 fdc->fdu = fdu; 1746 fdc->fdctl_wr(fdc, fd->ft->trans); 1747 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 1748 /*******************************************************\ 1749 * If the next drive has a motor startup pending, then * 1750 * it will start up in its own good time * 1751 \*******************************************************/ 1752 if(fd->flags & FD_MOTOR_WAIT) { 1753 fdc->state = MOTORWAIT; 1754 return (0); /* come back later */ 1755 } 1756 /*******************************************************\ 1757 * Maybe if it's not starting, it SHOULD be starting * 1758 \*******************************************************/ 1759 if (!(fd->flags & FD_MOTOR)) 1760 { 1761 fdc->state = MOTORWAIT; 1762 fd_turnon(fd); 1763 return (0); 1764 } 1765 else /* at least make sure we are selected */ 1766 { 1767 set_motor(fdc, fd->fdsu, TURNON); 1768 } 1769 if (fdc->flags & FDC_NEEDS_RESET) { 1770 fdc->state = RESETCTLR; 1771 fdc->flags &= ~FDC_NEEDS_RESET; 1772 } else 1773 fdc->state = DOSEEK; 1774 return (1); /* come back immediately */ 1775 1776 case DOSEEK: 1777 blknum = bp->bio_pblkno + fd->skip / fdblk; 1778 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 1779 if (cylinder == fd->track) 1780 { 1781 fdc->state = SEEKCOMPLETE; 1782 return (1); /* come back immediately */ 1783 } 1784 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 1785 fd->fdsu, cylinder * fd->ft->steptrac, 1786 0)) 1787 { 1788 /* 1789 * seek command not accepted, looks like 1790 * the FDC went off to the Saints... 1791 */ 1792 fdc->retry = 6; /* try a reset */ 1793 return(retrier(fdc)); 1794 } 1795 fd->track = FD_NO_TRACK; 1796 fdc->state = SEEKWAIT; 1797 return(0); /* will return later */ 1798 1799 case SEEKWAIT: 1800 /* allow heads to settle */ 1801 timeout(fd_pseudointr, fdc, hz / 16); 1802 fdc->state = SEEKCOMPLETE; 1803 return(0); /* will return later */ 1804 1805 case SEEKCOMPLETE : /* SEEK DONE, START DMA */ 1806 blknum = bp->bio_pblkno + fd->skip / fdblk; 1807 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 1808 1809 /* Make sure seek really happened*/ 1810 if(fd->track == FD_NO_TRACK) { 1811 int descyl = cylinder * fd->ft->steptrac; 1812 do { 1813 /* 1814 * This might be a "ready changed" interrupt, 1815 * which cannot really happen since the 1816 * RDY pin is hardwired to + 5 volts. This 1817 * generally indicates a "bouncing" intr 1818 * line, so do one of the following: 1819 * 1820 * When running on an enhanced FDC that is 1821 * known to not go stuck after responding 1822 * with INVALID, fetch all interrupt states 1823 * until seeing either an INVALID or a 1824 * real interrupt condition. 1825 * 1826 * When running on a dumb old NE765, give 1827 * up immediately. The controller will 1828 * provide up to four dummy RC interrupt 1829 * conditions right after reset (for the 1830 * corresponding four drives), so this is 1831 * our only chance to get notice that it 1832 * was not the FDC that caused the interrupt. 1833 */ 1834 if (fd_sense_int(fdc, &st0, &cyl) 1835 == FD_NOT_VALID) 1836 return 0; 1837 if(fdc->fdct == FDC_NE765 1838 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1839 return 0; /* hope for a real intr */ 1840 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1841 1842 if (0 == descyl) { 1843 int failed = 0; 1844 /* 1845 * seek to cyl 0 requested; make sure we are 1846 * really there 1847 */ 1848 if (fd_sense_drive_status(fdc, &st3)) 1849 failed = 1; 1850 if ((st3 & NE7_ST3_T0) == 0) { 1851 printf( 1852 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 1853 fdu, st3, NE7_ST3BITS); 1854 failed = 1; 1855 } 1856 1857 if (failed) { 1858 if(fdc->retry < 3) 1859 fdc->retry = 3; 1860 return (retrier(fdc)); 1861 } 1862 } 1863 1864 if (cyl != descyl) { 1865 printf( 1866 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 1867 fdu, descyl, cyl, st0); 1868 if (fdc->retry < 3) 1869 fdc->retry = 3; 1870 return (retrier(fdc)); 1871 } 1872 } 1873 1874 fd->track = cylinder; 1875 if (format) 1876 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 1877 - (char *)finfo; 1878 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 1879 isa_dmastart(idf, bp->bio_data+fd->skip, 1880 format ? bp->bio_bcount : fdblk, fdc->dmachan); 1881 blknum = bp->bio_pblkno + fd->skip / fdblk; 1882 sectrac = fd->ft->sectrac; 1883 sec = blknum % (sectrac * fd->ft->heads); 1884 head = sec / sectrac; 1885 sec = sec % sectrac + 1; 1886 fd->hddrv = ((head&1)<<2)+fdu; 1887 1888 if(format || !(read || rdsectid)) 1889 { 1890 /* make sure the drive is writable */ 1891 if(fd_sense_drive_status(fdc, &st3) != 0) 1892 { 1893 /* stuck controller? */ 1894 if (!(fdc->flags & FDC_NODMA)) 1895 isa_dmadone(idf, 1896 bp->bio_data + fd->skip, 1897 format ? bp->bio_bcount : fdblk, 1898 fdc->dmachan); 1899 fdc->retry = 6; /* reset the beast */ 1900 return (retrier(fdc)); 1901 } 1902 if(st3 & NE7_ST3_WP) 1903 { 1904 /* 1905 * XXX YES! this is ugly. 1906 * in order to force the current operation 1907 * to fail, we will have to fake an FDC 1908 * error - all error handling is done 1909 * by the retrier() 1910 */ 1911 fdc->status[0] = NE7_ST0_IC_AT; 1912 fdc->status[1] = NE7_ST1_NW; 1913 fdc->status[2] = 0; 1914 fdc->status[3] = fd->track; 1915 fdc->status[4] = head; 1916 fdc->status[5] = sec; 1917 fdc->retry = 8; /* break out immediately */ 1918 fdc->state = IOTIMEDOUT; /* not really... */ 1919 return (1); 1920 } 1921 } 1922 1923 if (format) { 1924 if (fdc->flags & FDC_NODMA) { 1925 /* 1926 * This seems to be necessary for 1927 * whatever obscure reason; if we omit 1928 * it, we end up filling the sector ID 1929 * fields of the newly formatted track 1930 * entirely with garbage, causing 1931 * `wrong cylinder' errors all over 1932 * the place when trying to read them 1933 * back. 1934 * 1935 * Umpf. 1936 */ 1937 SET_BCDR(fdc, 1, bp->bio_bcount, 0); 1938 1939 (void)fdcpio(fdc,bp->bio_cmd, 1940 bp->bio_data+fd->skip, 1941 bp->bio_bcount); 1942 1943 } 1944 /* formatting */ 1945 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu, 1946 finfo->fd_formb_secshift, 1947 finfo->fd_formb_nsecs, 1948 finfo->fd_formb_gaplen, 1949 finfo->fd_formb_fillbyte, 0)) { 1950 /* controller fell over */ 1951 if (!(fdc->flags & FDC_NODMA)) 1952 isa_dmadone(idf, 1953 bp->bio_data + fd->skip, 1954 format ? bp->bio_bcount : fdblk, 1955 fdc->dmachan); 1956 fdc->retry = 6; 1957 return (retrier(fdc)); 1958 } 1959 } else if (rdsectid) { 1960 if (fd_cmd(fdc, 2, NE7CMD_READID, head << 2 | fdu, 0)) { 1961 /* controller jamming */ 1962 fdc->retry = 6; 1963 return (retrier(fdc)); 1964 } 1965 } else { 1966 /* read or write operation */ 1967 if (fdc->flags & FDC_NODMA) { 1968 /* 1969 * this seems to be necessary even when 1970 * reading data 1971 */ 1972 SET_BCDR(fdc, 1, fdblk, 0); 1973 1974 /* 1975 * perform the write pseudo-DMA before 1976 * the WRITE command is sent 1977 */ 1978 if (!read) 1979 (void)fdcpio(fdc,bp->bio_cmd, 1980 bp->bio_data+fd->skip, 1981 fdblk); 1982 } 1983 if (fd_cmd(fdc, 9, 1984 (read ? NE7CMD_READ : NE7CMD_WRITE), 1985 head << 2 | fdu, /* head & unit */ 1986 fd->track, /* track */ 1987 head, 1988 sec, /* sector + 1 */ 1989 fd->ft->secsize, /* sector size */ 1990 sectrac, /* sectors/track */ 1991 fd->ft->gap, /* gap size */ 1992 fd->ft->datalen, /* data length */ 1993 0)) { 1994 /* the beast is sleeping again */ 1995 if (!(fdc->flags & FDC_NODMA)) 1996 isa_dmadone(idf, 1997 bp->bio_data + fd->skip, 1998 format ? bp->bio_bcount : fdblk, 1999 fdc->dmachan); 2000 fdc->retry = 6; 2001 return (retrier(fdc)); 2002 } 2003 } 2004 if (!rdsectid && (fdc->flags & FDC_NODMA)) 2005 /* 2006 * if this is a read, then simply await interrupt 2007 * before performing PIO 2008 */ 2009 if (read && !fdcpio(fdc,bp->bio_cmd, 2010 bp->bio_data+fd->skip,fdblk)) { 2011 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2012 return(0); /* will return later */ 2013 } 2014 2015 /* 2016 * write (or format) operation will fall through and 2017 * await completion interrupt 2018 */ 2019 fdc->state = IOCOMPLETE; 2020 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2021 return (0); /* will return later */ 2022 2023 case PIOREAD: 2024 /* 2025 * actually perform the PIO read. The IOCOMPLETE case 2026 * removes the timeout for us. 2027 */ 2028 (void)fdcpio(fdc,bp->bio_cmd,bp->bio_data+fd->skip,fdblk); 2029 fdc->state = IOCOMPLETE; 2030 /* FALLTHROUGH */ 2031 case IOCOMPLETE: /* IO DONE, post-analyze */ 2032 untimeout(fd_iotimeout, fdc, fd->tohandle); 2033 2034 if (fd_read_status(fdc)) { 2035 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2036 isa_dmadone(idf, bp->bio_data + fd->skip, 2037 format ? bp->bio_bcount : fdblk, 2038 fdc->dmachan); 2039 if (fdc->retry < 6) 2040 fdc->retry = 6; /* force a reset */ 2041 return (retrier(fdc)); 2042 } 2043 2044 fdc->state = IOTIMEDOUT; 2045 2046 /* FALLTHROUGH */ 2047 case IOTIMEDOUT: 2048 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2049 isa_dmadone(idf, bp->bio_data + fd->skip, 2050 format ? bp->bio_bcount : fdblk, fdc->dmachan); 2051 if (fdc->status[0] & NE7_ST0_IC) { 2052 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2053 && fdc->status[1] & NE7_ST1_OR) { 2054 /* 2055 * DMA overrun. Someone hogged the bus and 2056 * didn't release it in time for the next 2057 * FDC transfer. 2058 * 2059 * We normally restart this without bumping 2060 * the retry counter. However, in case 2061 * something is seriously messed up (like 2062 * broken hardware), we rather limit the 2063 * number of retries so the IO operation 2064 * doesn't block indefinately. 2065 */ 2066 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 2067 fdc->state = SEEKCOMPLETE; 2068 return (1); 2069 } /* else fall through */ 2070 } 2071 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 2072 && fdc->retry < 6) 2073 fdc->retry = 6; /* force a reset */ 2074 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2075 && fdc->status[2] & NE7_ST2_WC 2076 && fdc->retry < 3) 2077 fdc->retry = 3; /* force recalibrate */ 2078 return (retrier(fdc)); 2079 } 2080 /* All OK */ 2081 if (rdsectid) { 2082 /* copy out ID field contents */ 2083 idp = (struct fdc_readid *)bp->bio_data; 2084 idp->cyl = fdc->status[3]; 2085 idp->head = fdc->status[4]; 2086 idp->sec = fdc->status[5]; 2087 idp->secshift = fdc->status[6]; 2088 } 2089 /* Operation successful, retry DMA overruns again next time. */ 2090 fdc->dma_overruns = 0; 2091 fd->skip += fdblk; 2092 if (!rdsectid && !format && fd->skip < bp->bio_bcount) { 2093 /* set up next transfer */ 2094 fdc->state = DOSEEK; 2095 } else { 2096 /* ALL DONE */ 2097 fd->skip = 0; 2098 bp->bio_resid = 0; 2099 fdc->bp = NULL; 2100 device_unbusy(fd->dev); 2101 biofinish(bp, &fd->device_stats, 0); 2102 fdc->fd = (fd_p) 0; 2103 fdc->fdu = -1; 2104 fdc->state = FINDWORK; 2105 } 2106 return (1); 2107 2108 case RESETCTLR: 2109 fdc_reset(fdc); 2110 fdc->retry++; 2111 fdc->state = RESETCOMPLETE; 2112 return (0); 2113 2114 case RESETCOMPLETE: 2115 /* 2116 * Discard all the results from the reset so that they 2117 * can't cause an unexpected interrupt later. 2118 */ 2119 for (i = 0; i < 4; i++) 2120 (void)fd_sense_int(fdc, &st0, &cyl); 2121 fdc->state = STARTRECAL; 2122 /* FALLTHROUGH */ 2123 case STARTRECAL: 2124 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 2125 /* arrgl */ 2126 fdc->retry = 6; 2127 return (retrier(fdc)); 2128 } 2129 fdc->state = RECALWAIT; 2130 return (0); /* will return later */ 2131 2132 case RECALWAIT: 2133 /* allow heads to settle */ 2134 timeout(fd_pseudointr, fdc, hz / 8); 2135 fdc->state = RECALCOMPLETE; 2136 return (0); /* will return later */ 2137 2138 case RECALCOMPLETE: 2139 do { 2140 /* 2141 * See SEEKCOMPLETE for a comment on this: 2142 */ 2143 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2144 return 0; 2145 if(fdc->fdct == FDC_NE765 2146 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2147 return 0; /* hope for a real intr */ 2148 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2149 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2150 { 2151 if(fdc->retry > 3) 2152 /* 2153 * a recalibrate from beyond cylinder 77 2154 * will "fail" due to the FDC limitations; 2155 * since people used to complain much about 2156 * the failure message, try not logging 2157 * this one if it seems to be the first 2158 * time in a line 2159 */ 2160 printf("fd%d: recal failed ST0 %b cyl %d\n", 2161 fdu, st0, NE7_ST0BITS, cyl); 2162 if(fdc->retry < 3) fdc->retry = 3; 2163 return (retrier(fdc)); 2164 } 2165 fd->track = 0; 2166 /* Seek (probably) necessary */ 2167 fdc->state = DOSEEK; 2168 return (1); /* will return immediatly */ 2169 2170 case MOTORWAIT: 2171 if(fd->flags & FD_MOTOR_WAIT) 2172 { 2173 return (0); /* time's not up yet */ 2174 } 2175 if (fdc->flags & FDC_NEEDS_RESET) { 2176 fdc->state = RESETCTLR; 2177 fdc->flags &= ~FDC_NEEDS_RESET; 2178 } else 2179 fdc->state = DOSEEK; 2180 return (1); /* will return immediatly */ 2181 2182 default: 2183 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2184 if (fd_read_status(fdc) == 0) 2185 printf("FDC status :%x %x %x %x %x %x %x ", 2186 fdc->status[0], 2187 fdc->status[1], 2188 fdc->status[2], 2189 fdc->status[3], 2190 fdc->status[4], 2191 fdc->status[5], 2192 fdc->status[6] ); 2193 else 2194 printf("No status available "); 2195 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2196 { 2197 printf("[controller is dead now]\n"); 2198 return (0); 2199 } 2200 printf("ST0 = %x, PCN = %x\n", st0, cyl); 2201 return (0); 2202 } 2203 /* keep the compiler happy -- noone should ever get here */ 2204 return (999999); 2205} 2206 2207static int 2208retrier(struct fdc_data *fdc) 2209{ 2210 struct bio *bp; 2211 struct fd_data *fd; 2212 int fdu; 2213 2214 bp = fdc->bp; 2215 2216 /* XXX shouldn't this be cached somewhere? */ 2217 fdu = FDUNIT(minor(bp->bio_dev)); 2218 fd = devclass_get_softc(fd_devclass, fdu); 2219 if (fd->options & FDOPT_NORETRY) 2220 goto fail; 2221 2222 switch (fdc->retry) { 2223 case 0: case 1: case 2: 2224 fdc->state = SEEKCOMPLETE; 2225 break; 2226 case 3: case 4: case 5: 2227 fdc->state = STARTRECAL; 2228 break; 2229 case 6: 2230 fdc->state = RESETCTLR; 2231 break; 2232 case 7: 2233 break; 2234 default: 2235 fail: 2236 if ((fd->options & FDOPT_NOERRLOG) == 0) { 2237 diskerr(bp, "hard error", fdc->fd->skip / DEV_BSIZE, 2238 (struct disklabel *)NULL); 2239 if (fdc->flags & FDC_STAT_VALID) { 2240 printf( 2241 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2242 fdc->status[0], NE7_ST0BITS, 2243 fdc->status[1], NE7_ST1BITS, 2244 fdc->status[2], NE7_ST2BITS, 2245 fdc->status[3], fdc->status[4], 2246 fdc->status[5]); 2247 } 2248 else 2249 printf(" (No status)\n"); 2250 } 2251 if ((fd->options & FDOPT_NOERROR) == 0) { 2252 bp->bio_flags |= BIO_ERROR; 2253 bp->bio_error = EIO; 2254 bp->bio_resid = bp->bio_bcount - fdc->fd->skip; 2255 } else 2256 bp->bio_resid = 0; 2257 fdc->bp = NULL; 2258 fdc->fd->skip = 0; 2259 device_unbusy(fd->dev); 2260 biofinish(bp, &fdc->fd->device_stats, 0); 2261 fdc->state = FINDWORK; 2262 fdc->flags |= FDC_NEEDS_RESET; 2263 fdc->fd = (fd_p) 0; 2264 fdc->fdu = -1; 2265 return (1); 2266 } 2267 fdc->retry++; 2268 return (1); 2269} 2270 2271static void 2272fdbiodone(struct bio *bp) 2273{ 2274 wakeup(bp); 2275} 2276 2277static int 2278fdmisccmd(dev_t dev, u_int cmd, void *data) 2279{ 2280 fdu_t fdu; 2281 fd_p fd; 2282 struct bio *bp; 2283 struct fd_formb *finfo; 2284 struct fdc_readid *idfield; 2285 size_t fdblk; 2286 2287 fdu = FDUNIT(minor(dev)); 2288 fd = devclass_get_softc(fd_devclass, fdu); 2289 fdblk = 128 << fd->ft->secsize; 2290 finfo = (struct fd_formb *)data; 2291 idfield = (struct fdc_readid *)data; 2292 2293 bp = malloc(sizeof(struct bio), M_TEMP, M_ZERO); 2294 2295 /* 2296 * Set up a bio request for fdstrategy(). bio_blkno is faked 2297 * so that fdstrategy() will seek to the the requested 2298 * cylinder, and use the desired head. Since we are not 2299 * interested in bioqdisksort() munging with our faked bio 2300 * request, we mark it as being an ordered request. 2301 */ 2302 bp->bio_cmd = cmd; 2303 if (cmd == BIO_FORMAT) { 2304 bp->bio_blkno = 2305 (finfo->cyl * (fd->ft->sectrac * fd->ft->heads) + 2306 finfo->head * fd->ft->sectrac) * 2307 fdblk / DEV_BSIZE; 2308 bp->bio_bcount = sizeof(struct fd_idfield_data) * 2309 finfo->fd_formb_nsecs; 2310 } else if (cmd == BIO_RDSECTID) { 2311 bp->bio_blkno = 2312 (idfield->cyl * (fd->ft->sectrac * fd->ft->heads) + 2313 idfield->head * fd->ft->sectrac) * 2314 fdblk / DEV_BSIZE; 2315 bp->bio_bcount = sizeof(struct fdc_readid); 2316 } else 2317 panic("wrong cmd in fdmisccmd()"); 2318 bp->bio_data = data; 2319 bp->bio_dev = dev; 2320 bp->bio_done = fdbiodone; 2321 bp->bio_flags = BIO_ORDERED; 2322 2323 /* 2324 * Now run the command. The wait loop is a version of bufwait() 2325 * adapted for struct bio instead of struct buf and specialized 2326 * for the current context. 2327 */ 2328 fdstrategy(bp); 2329 while ((bp->bio_flags & BIO_DONE) == 0) 2330 tsleep(bp, PRIBIO, "fdcmd", 0); 2331 2332 free(bp, M_TEMP); 2333 return (bp->bio_flags & BIO_ERROR ? bp->bio_error : 0); 2334} 2335 2336static int 2337fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 2338{ 2339 fdu_t fdu; 2340 fd_p fd; 2341 struct fd_type *fdt; 2342 struct disklabel *lp; 2343 struct fdc_status *fsp; 2344 struct fdc_readid *rid; 2345 size_t fdblk; 2346 int error; 2347 2348 fdu = FDUNIT(minor(dev)); 2349 fd = devclass_get_softc(fd_devclass, fdu); 2350 2351 2352 fdblk = 128 << fd->ft->secsize; 2353 error = 0; 2354 2355 switch (cmd) { 2356 case DIOCGDINFO: 2357 lp = malloc(sizeof(*lp), M_TEMP, M_ZERO); 2358 lp->d_secsize = fdblk; 2359 fdt = fd->ft; 2360 lp->d_secpercyl = fdt->size / fdt->tracks; 2361 lp->d_type = DTYPE_FLOPPY; 2362 if (readdisklabel(dkmodpart(dev, RAW_PART), lp) != NULL) 2363 error = EINVAL; 2364 else 2365 *(struct disklabel *)addr = *lp; 2366 free(lp, M_TEMP); 2367 break; 2368 2369 case DIOCSDINFO: 2370 if ((flag & FWRITE) == 0) 2371 return (EBADF); 2372 /* 2373 * XXX perhaps should call setdisklabel() to do error checking 2374 * although there is nowhere to "set" the result. Perhaps 2375 * should always just fail. 2376 */ 2377 break; 2378 2379 case DIOCWLABEL: 2380 if ((flag & FWRITE) == 0) 2381 return (EBADF); 2382 break; 2383 2384 case DIOCWDINFO: 2385 if ((flag & FWRITE) == 0) 2386 return (EBADF); 2387 lp = malloc(DEV_BSIZE, M_TEMP, M_ZERO); 2388 error = setdisklabel(lp, (struct disklabel *)addr, (u_long)0); 2389 if (error != 0) 2390 error = writedisklabel(dev, lp); 2391 free(lp, M_TEMP); 2392 break; 2393 2394 case FD_FORM: 2395 if ((flag & FWRITE) == 0) 2396 return (EBADF); /* must be opened for writing */ 2397 if (((struct fd_formb *)addr)->format_version != 2398 FD_FORMAT_VERSION) 2399 return (EINVAL); /* wrong version of formatting prog */ 2400 error = fdmisccmd(dev, BIO_FORMAT, addr); 2401 break; 2402 2403 case FD_GTYPE: /* get drive type */ 2404 *(struct fd_type *)addr = *fd->ft; 2405 break; 2406 2407 case FD_STYPE: /* set drive type */ 2408 /* this is considered harmful; only allow for superuser */ 2409 if (suser(p) != 0) 2410 return (EPERM); 2411 *fd->ft = *(struct fd_type *)addr; 2412 break; 2413 2414 case FD_GOPTS: /* get drive options */ 2415 *(int *)addr = fd->options; 2416 break; 2417 2418 case FD_SOPTS: /* set drive options */ 2419 fd->options = *(int *)addr; 2420 break; 2421 2422#ifdef FDC_DEBUG 2423 case FD_DEBUG: 2424 fd_debug = *(int *)addr; 2425 break; 2426#endif 2427 2428 case FD_CLRERR: 2429 if (suser(p) != 0) 2430 return (EPERM); 2431 fd->fdc->fdc_errs = 0; 2432 break; 2433 2434 case FD_GSTAT: 2435 fsp = (struct fdc_status *)addr; 2436 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2437 return (EINVAL); 2438 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2439 break; 2440 2441 case FD_READID: 2442 rid = (struct fdc_readid *)addr; 2443 if (rid->cyl > MAX_CYLINDER || rid->head > MAX_HEAD) 2444 return (EINVAL); 2445 error = fdmisccmd(dev, BIO_RDSECTID, addr); 2446 break; 2447 2448 default: 2449 error = ENOTTY; 2450 break; 2451 } 2452 return (error); 2453} 2454