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 * Copyright (c) 1993, 1994 by 9 * jc@irbs.UUCP (John Capo) 10 * vak@zebub.msk.su (Serge Vakulenko) 11 * ache@astral.msk.su (Andrew A. Chernov) 12 * 13 * Copyright (c) 1993, 1994, 1995 by 14 * joerg_wunsch@uriah.sax.de (Joerg Wunsch) 15 * dufault@hda.com (Peter Dufault) 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions 19 * are met: 20 * 1. Redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer. 22 * 2. Redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution. 25 * 3. All advertising materials mentioning features or use of this software 26 * must display the following acknowledgement: 27 * This product includes software developed by the University of 28 * California, Berkeley and its contributors. 29 * 4. Neither the name of the University nor the names of its contributors 30 * may be used to endorse or promote products derived from this software 31 * without specific prior written permission. 32 * 33 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 34 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 35 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 36 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 37 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 38 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 39 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 41 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 42 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 43 * SUCH DAMAGE. 44 * 45 * from: @(#)fd.c 7.4 (Berkeley) 5/25/91 46 * $Id: fd.c,v 1.92 1996/09/06 23:07:18 phk Exp $ 47 * 48 */ 49 50 #include "ft.h" 51 #if NFT < 1 52 #undef NFDC 53 #endif 54 #include "fd.h" 55 56 #if NFDC > 0 57 58 #include <sys/param.h> 59 #include <sys/systm.h> 60 #include <sys/kernel.h> 61 #include <sys/conf.h> 62 #include <sys/file.h> 63 #include <sys/ioctl.h> 64 #include <machine/clock.h> 65 #include <machine/ioctl_fd.h> 66 #include <sys/disklabel.h> 67 #include <sys/buf.h> 68 #include <sys/uio.h> 69 #include <sys/malloc.h> 70 #include <sys/proc.h> 71 #include <sys/syslog.h> 72 #include <sys/dkstat.h> 73 #include <i386/isa/isa.h> 74 #include <i386/isa/isa_device.h> 75 #include <i386/isa/fdreg.h> 76 #include <i386/isa/fdc.h> 77 #include <i386/isa/rtc.h> 78 #include <machine/stdarg.h> 79 #if NFT > 0 80 #include <sys/ftape.h> 81 #include <i386/isa/ftreg.h> 82 #endif 83 #ifdef DEVFS 84 #include <sys/devfsext.h> 85 #endif 86 87 /* misuse a flag to identify format operation */ 88 #define B_FORMAT B_XXX 89 90 /* 91 * this biotab field doubles as a field for the physical unit number 92 * on the controller 93 */ 94 #define id_physid id_scsiid 95 96 /* error returns for fd_cmd() */ 97 #define FD_FAILED -1 98 #define FD_NOT_VALID -2 99 #define FDC_ERRMAX 100 /* do not log more */ 100 101 #define NUMTYPES 14 102 #define NUMDENS (NUMTYPES - 6) 103 104 /* These defines (-1) must match index for fd_types */ 105 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */ 106 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */ 107 #define FD_1720 1 108 #define FD_1480 2 109 #define FD_1440 3 110 #define FD_1200 4 111 #define FD_820 5 112 #define FD_800 6 113 #define FD_720 7 114 #define FD_360 8 115 116 #define FD_1480in5_25 9 117 #define FD_1440in5_25 10 118 #define FD_820in5_25 11 119 #define FD_800in5_25 12 120 #define FD_720in5_25 13 121 #define FD_360in5_25 14 122 123 124 static struct fd_type fd_types[NUMTYPES] = 125 { 126 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */ 127 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */ 128 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */ 129 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */ 130 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */ 131 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */ 132 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */ 133 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */ 134 135 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */ 136 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */ 137 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */ 138 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */ 139 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */ 140 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */ 141 }; 142 143 #define DRVS_PER_CTLR 2 /* 2 floppies */ 144 145 /***********************************************************************\ 146 * Per controller structure. * 147 \***********************************************************************/ 148 struct fdc_data fdc_data[NFDC]; 149 150 /***********************************************************************\ 151 * Per drive structure. * 152 * N per controller (DRVS_PER_CTLR) * 153 \***********************************************************************/ 154 static struct fd_data { 155 struct fdc_data *fdc; /* pointer to controller structure */ 156 int fdsu; /* this units number on this controller */ 157 int type; /* Drive type (FD_1440...) */ 158 struct fd_type *ft; /* pointer to the type descriptor */ 159 int flags; 160 #define FD_OPEN 0x01 /* it's open */ 161 #define FD_ACTIVE 0x02 /* it's active */ 162 #define FD_MOTOR 0x04 /* motor should be on */ 163 #define FD_MOTOR_WAIT 0x08 /* motor coming up */ 164 int skip; 165 int hddrv; 166 #define FD_NO_TRACK -2 167 int track; /* where we think the head is */ 168 int options; /* user configurable options, see ioctl_fd.h */ 169 int dkunit; /* disk stats unit number */ 170 #ifdef DEVFS 171 void *bdevs[1 + NUMDENS + MAXPARTITIONS]; 172 void *cdevs[1 + NUMDENS + MAXPARTITIONS]; 173 #endif 174 } fd_data[NFD]; 175 176 /***********************************************************************\ 177 * Throughout this file the following conventions will be used: * 178 * fd is a pointer to the fd_data struct for the drive in question * 179 * fdc is a pointer to the fdc_data struct for the controller * 180 * fdu is the floppy drive unit number * 181 * fdcu is the floppy controller unit number * 182 * fdsu is the floppy drive unit number on that controller. (sub-unit) * 183 \***********************************************************************/ 184 185 #if NFT > 0 186 int ftopen(dev_t, int); 187 int ftintr(ftu_t ftu); 188 int ftclose(dev_t, int); 189 void ftstrategy(struct buf *); 190 int ftioctl(dev_t, int, caddr_t, int, struct proc *); 191 int ftdump(dev_t); 192 int ftsize(dev_t); 193 int ftattach(struct isa_device *, struct isa_device *, int); 194 #endif 195 196 /* autoconfig functions */ 197 static int fdprobe(struct isa_device *); 198 static int fdattach(struct isa_device *); 199 200 /* needed for ft driver, thus exported */ 201 int in_fdc(fdcu_t); 202 int out_fdc(fdcu_t, int); 203 204 /* internal functions */ 205 static void set_motor(fdcu_t, int, int); 206 # define TURNON 1 207 # define TURNOFF 0 208 static timeout_t fd_turnoff; 209 static timeout_t fd_motor_on; 210 static void fd_turnon(fdu_t); 211 static void fdc_reset(fdc_p); 212 static int fd_in(fdcu_t, int *); 213 static void fdstart(fdcu_t); 214 static timeout_t fd_timeout; 215 static timeout_t fd_pseudointr; 216 static int fdstate(fdcu_t, fdc_p); 217 static int retrier(fdcu_t); 218 static int fdformat(dev_t, struct fd_formb *, struct proc *); 219 220 221 #define DEVIDLE 0 222 #define FINDWORK 1 223 #define DOSEEK 2 224 #define SEEKCOMPLETE 3 225 #define IOCOMPLETE 4 226 #define RECALCOMPLETE 5 227 #define STARTRECAL 6 228 #define RESETCTLR 7 229 #define SEEKWAIT 8 230 #define RECALWAIT 9 231 #define MOTORWAIT 10 232 #define IOTIMEDOUT 11 233 234 #ifdef DEBUG 235 static 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 }; 250 251 /* CAUTION: fd_debug causes huge amounts of logging output */ 252 static int volatile fd_debug = 0; 253 #define TRACE0(arg) if(fd_debug) printf(arg) 254 #define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2) 255 #else /* DEBUG */ 256 #define TRACE0(arg) 257 #define TRACE1(arg1, arg2) 258 #endif /* DEBUG */ 259 260 /* autoconfig structure */ 261 262 struct isa_driver fdcdriver = { 263 fdprobe, fdattach, "fdc", 264 }; 265 266 static d_open_t Fdopen; /* NOTE, not fdopen */ 267 static d_close_t fdclose; 268 static d_ioctl_t fdioctl; 269 static d_strategy_t fdstrategy; 270 271 #define CDEV_MAJOR 9 272 #define BDEV_MAJOR 2 273 static struct cdevsw fd_cdevsw; 274 static struct bdevsw fd_bdevsw = 275 { Fdopen, fdclose, fdstrategy, fdioctl, /*2*/ 276 nodump, nopsize, 0, "fd", &fd_cdevsw, -1 }; 277 278 279 static struct isa_device *fdcdevs[NFDC]; 280 281 static int 282 fdc_err(fdcu_t fdcu, const char *s) 283 { 284 fdc_data[fdcu].fdc_errs++; 285 if(s) { 286 if(fdc_data[fdcu].fdc_errs < FDC_ERRMAX) 287 printf("fdc%d: %s", fdcu, s); 288 else if(fdc_data[fdcu].fdc_errs == FDC_ERRMAX) 289 printf("fdc%d: too many errors, not logging any more\n", 290 fdcu); 291 } 292 293 return FD_FAILED; 294 } 295 296 /* 297 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 298 * Unit number, 299 * # of output bytes, output bytes as ints ..., 300 * # of input bytes, input bytes as ints ... 301 */ 302 303 static int 304 fd_cmd(fdcu_t fdcu, int n_out, ...) 305 { 306 u_char cmd; 307 int n_in; 308 int n; 309 va_list ap; 310 311 va_start(ap, n_out); 312 cmd = (u_char)(va_arg(ap, int)); 313 va_end(ap); 314 va_start(ap, n_out); 315 for (n = 0; n < n_out; n++) 316 { 317 if (out_fdc(fdcu, va_arg(ap, int)) < 0) 318 { 319 char msg[50]; 320 sprintf(msg, 321 "cmd %x failed at out byte %d of %d\n", 322 cmd, n + 1, n_out); 323 return fdc_err(fdcu, msg); 324 } 325 } 326 n_in = va_arg(ap, int); 327 for (n = 0; n < n_in; n++) 328 { 329 int *ptr = va_arg(ap, int *); 330 if (fd_in(fdcu, ptr) < 0) 331 { 332 char msg[50]; 333 sprintf(msg, 334 "cmd %02x failed at in byte %d of %d\n", 335 cmd, n + 1, n_in); 336 return fdc_err(fdcu, msg); 337 } 338 } 339 340 return 0; 341 } 342 343 static int 344 fd_sense_drive_status(fdc_p fdc, int *st3p) 345 { 346 int st3; 347 348 if (fd_cmd(fdc->fdcu, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 349 { 350 return fdc_err(fdc->fdcu, "Sense Drive Status failed\n"); 351 } 352 if (st3p) 353 *st3p = st3; 354 355 return 0; 356 } 357 358 static int 359 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 360 { 361 int st0, cyl; 362 363 int ret = fd_cmd(fdc->fdcu, 1, NE7CMD_SENSEI, 1, &st0); 364 365 if (ret) 366 { 367 (void)fdc_err(fdc->fdcu, 368 "sense intr err reading stat reg 0\n"); 369 return ret; 370 } 371 372 if (st0p) 373 *st0p = st0; 374 375 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) 376 { 377 /* 378 * There doesn't seem to have been an interrupt. 379 */ 380 return FD_NOT_VALID; 381 } 382 383 if (fd_in(fdc->fdcu, &cyl) < 0) 384 { 385 return fdc_err(fdc->fdcu, "can't get cyl num\n"); 386 } 387 388 if (cylp) 389 *cylp = cyl; 390 391 return 0; 392 } 393 394 395 static int 396 fd_read_status(fdc_p fdc, int fdsu) 397 { 398 int i, ret; 399 400 for (i = 0; i < 7; i++) 401 { 402 /* 403 * XXX types are poorly chosen. Only bytes can by read 404 * from the hardware, but fdc_status wants u_longs and 405 * fd_in() gives ints. 406 */ 407 int status; 408 409 ret = fd_in(fdc->fdcu, &status); 410 fdc->status[i] = status; 411 if (ret != 0) 412 break; 413 } 414 415 if (ret == 0) 416 fdc->flags |= FDC_STAT_VALID; 417 else 418 fdc->flags &= ~FDC_STAT_VALID; 419 420 return ret; 421 } 422 423 /****************************************************************************/ 424 /* autoconfiguration stuff */ 425 /****************************************************************************/ 426 427 /* 428 * probe for existance of controller 429 */ 430 static int 431 fdprobe(struct isa_device *dev) 432 { 433 fdcu_t fdcu = dev->id_unit; 434 if(fdc_data[fdcu].flags & FDC_ATTACHED) 435 { 436 printf("fdc%d: unit used multiple times\n", fdcu); 437 return 0; 438 } 439 440 fdcdevs[fdcu] = dev; 441 fdc_data[fdcu].baseport = dev->id_iobase; 442 443 /* First - lets reset the floppy controller */ 444 outb(dev->id_iobase+FDOUT, 0); 445 DELAY(100); 446 outb(dev->id_iobase+FDOUT, FDO_FRST); 447 448 /* see if it can handle a command */ 449 if (fd_cmd(fdcu, 450 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 451 0)) 452 { 453 return(0); 454 } 455 return (IO_FDCSIZE); 456 } 457 458 /* 459 * wire controller into system, look for floppy units 460 */ 461 static int 462 fdattach(struct isa_device *dev) 463 { 464 unsigned fdt; 465 fdu_t fdu; 466 fdcu_t fdcu = dev->id_unit; 467 fdc_p fdc = fdc_data + fdcu; 468 fd_p fd; 469 int fdsu, st0, st3, i; 470 #if NFT > 0 471 int unithasfd; 472 #endif 473 struct isa_device *fdup; 474 int ic_type = 0; 475 #ifdef DEVFS 476 int mynor; 477 int typemynor; 478 int typesize; 479 #endif 480 481 fdc->fdcu = fdcu; 482 fdc->flags |= FDC_ATTACHED; 483 fdc->dmachan = dev->id_drq; 484 /* Acquire the DMA channel forever, The driver will do the rest */ 485 isa_dma_acquire(fdc->dmachan); 486 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */); 487 fdc->state = DEVIDLE; 488 /* reset controller, turn motor off, clear fdout mirror reg */ 489 outb(fdc->baseport + FDOUT, ((fdc->fdout = 0))); 490 TAILQ_INIT(&fdc->head); 491 492 /* check for each floppy drive */ 493 for (fdup = isa_biotab_fdc; fdup->id_driver != 0; fdup++) { 494 if (fdup->id_iobase != dev->id_iobase) 495 continue; 496 fdu = fdup->id_unit; 497 fd = &fd_data[fdu]; 498 if (fdu >= (NFD+NFT)) 499 continue; 500 fdsu = fdup->id_physid; 501 /* look up what bios thinks we have */ 502 switch (fdu) { 503 case 0: fdt = (rtcin(RTC_FDISKETTE) & 0xf0); 504 break; 505 case 1: fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0); 506 break; 507 default: fdt = RTCFDT_NONE; 508 break; 509 } 510 /* is there a unit? */ 511 if ((fdt == RTCFDT_NONE) 512 #if NFT > 0 513 || (fdsu >= DRVS_PER_CTLR)) { 514 #else 515 ) { 516 fd->type = NO_TYPE; 517 #endif 518 #if NFT > 0 519 /* If BIOS says no floppy, or > 2nd device */ 520 /* Probe for and attach a floppy tape. */ 521 /* Tell FT if there was already a disk */ 522 /* with this unit number found. */ 523 524 unithasfd = 0; 525 if (fdu < NFD && fd->type != NO_TYPE) 526 unithasfd = 1; 527 if (ftattach(dev, fdup, unithasfd)) 528 continue; 529 if (fdsu < DRVS_PER_CTLR) 530 fd->type = NO_TYPE; 531 #endif 532 continue; 533 } 534 535 /* select it */ 536 set_motor(fdcu, fdsu, TURNON); 537 DELAY(1000000); /* 1 sec */ 538 539 if (ic_type == 0 && 540 fd_cmd(fdcu, 1, NE7CMD_VERSION, 1, &ic_type) == 0) 541 { 542 printf("fdc%d: ", fdcu); 543 ic_type = (u_char)ic_type; 544 switch( ic_type ) { 545 case 0x80: 546 printf("NEC 765\n"); 547 fdc->fdct = FDC_NE765; 548 break; 549 case 0x81: 550 printf("Intel 82077\n"); 551 fdc->fdct = FDC_I82077; 552 break; 553 case 0x90: 554 printf("NEC 72065B\n"); 555 fdc->fdct = FDC_NE72065; 556 break; 557 default: 558 printf("unknown IC type %02x\n", ic_type); 559 fdc->fdct = FDC_UNKNOWN; 560 break; 561 } 562 } 563 if ((fd_cmd(fdcu, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) && 564 (st3 & NE7_ST3_T0)) { 565 /* if at track 0, first seek inwards */ 566 /* seek some steps: */ 567 (void)fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0); 568 DELAY(300000); /* ...wait a moment... */ 569 (void)fd_sense_int(fdc, 0, 0); /* make ctrlr happy */ 570 } 571 572 /* If we're at track 0 first seek inwards. */ 573 if ((fd_sense_drive_status(fdc, &st3) == 0) && 574 (st3 & NE7_ST3_T0)) { 575 /* Seek some steps... */ 576 if (fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 577 /* ...wait a moment... */ 578 DELAY(300000); 579 /* make ctrlr happy: */ 580 (void)fd_sense_int(fdc, 0, 0); 581 } 582 } 583 584 for(i = 0; i < 2; i++) { 585 /* 586 * we must recalibrate twice, just in case the 587 * heads have been beyond cylinder 76, since most 588 * FDCs still barf when attempting to recalibrate 589 * more than 77 steps 590 */ 591 /* go back to 0: */ 592 if (fd_cmd(fdcu, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 593 /* a second being enough for full stroke seek*/ 594 DELAY(i == 0? 1000000: 300000); 595 596 /* anything responding? */ 597 if (fd_sense_int(fdc, &st0, 0) == 0 && 598 (st0 & NE7_ST0_EC) == 0) 599 break; /* already probed succesfully */ 600 } 601 } 602 603 set_motor(fdcu, fdsu, TURNOFF); 604 605 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */ 606 continue; 607 608 fd->track = FD_NO_TRACK; 609 fd->fdc = fdc; 610 fd->fdsu = fdsu; 611 fd->options = 0; 612 printf("fd%d: ", fdu); 613 614 switch (fdt) { 615 case RTCFDT_12M: 616 printf("1.2MB 5.25in\n"); 617 fd->type = FD_1200; 618 break; 619 case RTCFDT_144M: 620 printf("1.44MB 3.5in\n"); 621 fd->type = FD_1440; 622 break; 623 case RTCFDT_288M: 624 case RTCFDT_288M_1: 625 printf("2.88MB 3.5in - 1.44MB mode\n"); 626 fd->type = FD_1440; 627 break; 628 case RTCFDT_360K: 629 printf("360KB 5.25in\n"); 630 fd->type = FD_360; 631 break; 632 case RTCFDT_720K: 633 printf("720KB 3.5in\n"); 634 fd->type = FD_720; 635 break; 636 default: 637 printf("unknown\n"); 638 fd->type = NO_TYPE; 639 continue; 640 } 641 #ifdef DEVFS 642 mynor = fdu << 6; 643 fd->bdevs[0] = devfs_add_devswf(&fd_bdevsw, mynor, DV_BLK, 644 UID_ROOT, GID_OPERATOR, 0640, 645 "fd%d", fdu); 646 fd->cdevs[0] = devfs_add_devswf(&fd_cdevsw, mynor, DV_CHR, 647 UID_ROOT, GID_OPERATOR, 0640, 648 "rfd%d", fdu); 649 for (i = 1; i < 1 + NUMDENS; i++) { 650 /* 651 * XXX this and the lookup in Fdopen() should be 652 * data driven. 653 */ 654 switch (fd->type) { 655 case FD_360: 656 if (i != FD_360) 657 continue; 658 break; 659 case FD_720: 660 if (i != FD_720 && i != FD_800 && i != FD_820) 661 continue; 662 break; 663 case FD_1200: 664 if (i != FD_360 && i != FD_720 && i != FD_800 665 && i != FD_820 && i != FD_1200 666 && i != FD_1440 && i != FD_1480) 667 continue; 668 break; 669 case FD_1440: 670 if (i != FD_720 && i != FD_800 && i != FD_820 671 && i != FD_1200 && i != FD_1440 672 && i != FD_1480 && i != FD_1720) 673 continue; 674 break; 675 } 676 typemynor = mynor | i; 677 typesize = fd_types[i - 1].size / 2; 678 /* 679 * XXX all these conversions give bloated code and 680 * confusing names. 681 */ 682 if (typesize == 1476) 683 typesize = 1480; 684 if (typesize == 1722) 685 typesize = 1720; 686 fd->bdevs[i] = 687 devfs_add_devswf(&fd_bdevsw, typemynor, DV_BLK, 688 UID_ROOT, GID_OPERATOR, 0640, 689 "fd%d.%d", fdu, typesize); 690 fd->cdevs[i] = 691 devfs_add_devswf(&fd_cdevsw, typemynor, DV_CHR, 692 UID_ROOT, GID_OPERATOR, 0640, 693 "rfd%d.%d", fdu, typesize); 694 } 695 for (i = 0; i < MAXPARTITIONS; i++) { 696 fd->bdevs[1 + NUMDENS + i] = 697 devfs_link(fd->bdevs[0], 698 "fd%d%c", fdu, 'a' + i); 699 fd->cdevs[1 + NUMDENS + i] = 700 devfs_link(fd->cdevs[0], 701 "rfd%d%c", fdu, 'a' + i); 702 } 703 #endif /* DEVFS */ 704 if (dk_ndrive < DK_NDRIVE) { 705 sprintf(dk_names[dk_ndrive], "fd%d", fdu); 706 fd->dkunit = dk_ndrive++; 707 /* 708 * XXX assume rate is FDC_500KBPS. 709 */ 710 dk_wpms[dk_ndrive] = 500000 / 8 / 2; 711 } else { 712 fd->dkunit = -1; 713 } 714 } 715 716 return (1); 717 } 718 719 /****************************************************************************/ 720 /* motor control stuff */ 721 /* remember to not deselect the drive we're working on */ 722 /****************************************************************************/ 723 static void 724 set_motor(fdcu_t fdcu, int fdsu, int turnon) 725 { 726 int fdout = fdc_data[fdcu].fdout; 727 int needspecify = 0; 728 729 if(turnon) { 730 fdout &= ~FDO_FDSEL; 731 fdout |= (FDO_MOEN0 << fdsu) + fdsu; 732 } else 733 fdout &= ~(FDO_MOEN0 << fdsu); 734 735 if(!turnon 736 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0) 737 /* gonna turn off the last drive, put FDC to bed */ 738 fdout &= ~ (FDO_FRST|FDO_FDMAEN); 739 else { 740 /* make sure controller is selected and specified */ 741 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0) 742 needspecify = 1; 743 fdout |= (FDO_FRST|FDO_FDMAEN); 744 } 745 746 outb(fdc_data[fdcu].baseport+FDOUT, fdout); 747 fdc_data[fdcu].fdout = fdout; 748 TRACE1("[0x%x->FDOUT]", fdout); 749 750 if(needspecify) { 751 /* 752 * XXX 753 * special case: since we have just woken up the FDC 754 * from its sleep, we silently assume the command will 755 * be accepted, and do not test for a timeout 756 */ 757 (void)fd_cmd(fdcu, 3, NE7CMD_SPECIFY, 758 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 759 0); 760 } 761 } 762 763 static void 764 fd_turnoff(void *arg1) 765 { 766 fdu_t fdu = (fdu_t)arg1; 767 int s; 768 fd_p fd = fd_data + fdu; 769 770 TRACE1("[fd%d: turnoff]", fdu); 771 772 /* 773 * Don't turn off the motor yet if the drive is active. 774 * XXX shouldn't even schedule turnoff until drive is inactive 775 * and nothing is queued on it. 776 */ 777 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fdu) { 778 timeout(fd_turnoff, arg1, 4 * hz); 779 return; 780 } 781 782 s = splbio(); 783 fd->flags &= ~FD_MOTOR; 784 set_motor(fd->fdc->fdcu, fd->fdsu, TURNOFF); 785 splx(s); 786 } 787 788 static void 789 fd_motor_on(void *arg1) 790 { 791 fdu_t fdu = (fdu_t)arg1; 792 int s; 793 794 fd_p fd = fd_data + fdu; 795 s = splbio(); 796 fd->flags &= ~FD_MOTOR_WAIT; 797 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 798 { 799 fdintr(fd->fdc->fdcu); 800 } 801 splx(s); 802 } 803 804 static void 805 fd_turnon(fdu_t fdu) 806 { 807 fd_p fd = fd_data + fdu; 808 if(!(fd->flags & FD_MOTOR)) 809 { 810 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 811 set_motor(fd->fdc->fdcu, fd->fdsu, TURNON); 812 timeout(fd_motor_on, (caddr_t)fdu, hz); /* in 1 sec its ok */ 813 } 814 } 815 816 static void 817 fdc_reset(fdc_p fdc) 818 { 819 fdcu_t fdcu = fdc->fdcu; 820 821 /* Try a reset, keep motor on */ 822 outb(fdc->baseport + FDOUT, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 823 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 824 DELAY(100); 825 /* enable FDC, but defer interrupts a moment */ 826 outb(fdc->baseport + FDOUT, fdc->fdout & ~FDO_FDMAEN); 827 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 828 DELAY(100); 829 outb(fdc->baseport + FDOUT, fdc->fdout); 830 TRACE1("[0x%x->FDOUT]", fdc->fdout); 831 832 /* XXX after a reset, silently believe the FDC will accept commands */ 833 (void)fd_cmd(fdcu, 3, NE7CMD_SPECIFY, 834 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 835 0); 836 } 837 838 /****************************************************************************/ 839 /* fdc in/out */ 840 /****************************************************************************/ 841 int 842 in_fdc(fdcu_t fdcu) 843 { 844 int baseport = fdc_data[fdcu].baseport; 845 int i, j = 100000; 846 while ((i = inb(baseport+FDSTS) & (NE7_DIO|NE7_RQM)) 847 != (NE7_DIO|NE7_RQM) && j-- > 0) 848 if (i == NE7_RQM) 849 return fdc_err(fdcu, "ready for output in input\n"); 850 if (j <= 0) 851 return fdc_err(fdcu, bootverbose? "input ready timeout\n": 0); 852 #ifdef DEBUG 853 i = inb(baseport+FDDATA); 854 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 855 return(i); 856 #else 857 return inb(baseport+FDDATA); 858 #endif 859 } 860 861 /* 862 * fd_in: Like in_fdc, but allows you to see if it worked. 863 */ 864 static int 865 fd_in(fdcu_t fdcu, int *ptr) 866 { 867 int baseport = fdc_data[fdcu].baseport; 868 int i, j = 100000; 869 while ((i = inb(baseport+FDSTS) & (NE7_DIO|NE7_RQM)) 870 != (NE7_DIO|NE7_RQM) && j-- > 0) 871 if (i == NE7_RQM) 872 return fdc_err(fdcu, "ready for output in input\n"); 873 if (j <= 0) 874 return fdc_err(fdcu, bootverbose? "input ready timeout\n": 0); 875 #ifdef DEBUG 876 i = inb(baseport+FDDATA); 877 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 878 *ptr = i; 879 return 0; 880 #else 881 i = inb(baseport+FDDATA); 882 if (ptr) 883 *ptr = i; 884 return 0; 885 #endif 886 } 887 888 int 889 out_fdc(fdcu_t fdcu, int x) 890 { 891 int baseport = fdc_data[fdcu].baseport; 892 int i; 893 894 /* Check that the direction bit is set */ 895 i = 100000; 896 while ((inb(baseport+FDSTS) & NE7_DIO) && i-- > 0); 897 if (i <= 0) return fdc_err(fdcu, "direction bit not set\n"); 898 899 /* Check that the floppy controller is ready for a command */ 900 i = 100000; 901 while ((inb(baseport+FDSTS) & NE7_RQM) == 0 && i-- > 0); 902 if (i <= 0) 903 return fdc_err(fdcu, bootverbose? "output ready timeout\n": 0); 904 905 /* Send the command and return */ 906 outb(baseport+FDDATA, x); 907 TRACE1("[0x%x->FDDATA]", x); 908 return (0); 909 } 910 911 /****************************************************************************/ 912 /* fdopen/fdclose */ 913 /****************************************************************************/ 914 int 915 Fdopen(dev_t dev, int flags, int mode, struct proc *p) 916 { 917 fdu_t fdu = FDUNIT(minor(dev)); 918 int type = FDTYPE(minor(dev)); 919 fdc_p fdc; 920 921 #if NFT > 0 922 /* check for a tape open */ 923 if (type & F_TAPE_TYPE) 924 return(ftopen(dev, flags)); 925 #endif 926 /* check bounds */ 927 if (fdu >= NFD) 928 return(ENXIO); 929 fdc = fd_data[fdu].fdc; 930 if ((fdc == NULL) || (fd_data[fdu].type == NO_TYPE)) 931 return(ENXIO); 932 if (type > NUMDENS) 933 return(ENXIO); 934 if (type == 0) 935 type = fd_data[fdu].type; 936 else { 937 if (type != fd_data[fdu].type) { 938 switch (fd_data[fdu].type) { 939 case FD_360: 940 return(ENXIO); 941 case FD_720: 942 if ( type != FD_820 943 && type != FD_800 944 ) 945 return(ENXIO); 946 break; 947 case FD_1200: 948 switch (type) { 949 case FD_1480: 950 type = FD_1480in5_25; 951 break; 952 case FD_1440: 953 type = FD_1440in5_25; 954 break; 955 case FD_820: 956 type = FD_820in5_25; 957 break; 958 case FD_800: 959 type = FD_800in5_25; 960 break; 961 case FD_720: 962 type = FD_720in5_25; 963 break; 964 case FD_360: 965 type = FD_360in5_25; 966 break; 967 default: 968 return(ENXIO); 969 } 970 break; 971 case FD_1440: 972 if ( type != FD_1720 973 && type != FD_1480 974 && type != FD_1200 975 && type != FD_820 976 && type != FD_800 977 && type != FD_720 978 ) 979 return(ENXIO); 980 break; 981 } 982 } 983 } 984 fd_data[fdu].ft = fd_types + type - 1; 985 fd_data[fdu].flags |= FD_OPEN; 986 987 return 0; 988 } 989 990 int 991 fdclose(dev_t dev, int flags, int mode, struct proc *p) 992 { 993 fdu_t fdu = FDUNIT(minor(dev)); 994 995 #if NFT > 0 996 int type = FDTYPE(minor(dev)); 997 998 if (type & F_TAPE_TYPE) 999 return ftclose(dev, flags); 1000 #endif 1001 fd_data[fdu].flags &= ~FD_OPEN; 1002 fd_data[fdu].options &= ~FDOPT_NORETRY; 1003 1004 return(0); 1005 } 1006 1007 1008 /****************************************************************************/ 1009 /* fdstrategy */ 1010 /****************************************************************************/ 1011 void 1012 fdstrategy(struct buf *bp) 1013 { 1014 unsigned nblocks, blknum, cando; 1015 int s; 1016 fdcu_t fdcu; 1017 fdu_t fdu; 1018 fdc_p fdc; 1019 fd_p fd; 1020 size_t fdblk; 1021 1022 fdu = FDUNIT(minor(bp->b_dev)); 1023 fd = &fd_data[fdu]; 1024 fdc = fd->fdc; 1025 fdcu = fdc->fdcu; 1026 1027 #if NFT > 0 1028 if (FDTYPE(minor(bp->b_dev)) & F_TAPE_TYPE) { 1029 /* ft tapes do not (yet) support strategy i/o */ 1030 bp->b_error = ENODEV; 1031 bp->b_flags |= B_ERROR; 1032 goto bad; 1033 } 1034 /* check for controller already busy with tape */ 1035 if (fdc->flags & FDC_TAPE_BUSY) { 1036 bp->b_error = EBUSY; 1037 bp->b_flags |= B_ERROR; 1038 goto bad; 1039 } 1040 #endif 1041 fdblk = 128 << (fd->ft->secsize); 1042 if (!(bp->b_flags & B_FORMAT)) { 1043 if ((fdu >= NFD) || (bp->b_blkno < 0)) { 1044 printf( 1045 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n", 1046 fdu, (u_long)bp->b_blkno, bp->b_bcount); 1047 bp->b_error = EINVAL; 1048 bp->b_flags |= B_ERROR; 1049 goto bad; 1050 } 1051 if ((bp->b_bcount % fdblk) != 0) { 1052 bp->b_error = EINVAL; 1053 bp->b_flags |= B_ERROR; 1054 goto bad; 1055 } 1056 } 1057 1058 /* 1059 * Set up block calculations. 1060 */ 1061 if (bp->b_blkno > 20000000) { 1062 /* 1063 * Reject unreasonably high block number, prevent the 1064 * multiplication below from overflowing. 1065 */ 1066 bp->b_error = EINVAL; 1067 bp->b_flags |= B_ERROR; 1068 goto bad; 1069 } 1070 blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk; 1071 nblocks = fd->ft->size; 1072 bp->b_resid = 0; 1073 if (blknum + (bp->b_bcount / fdblk) > nblocks) { 1074 if (blknum <= nblocks) { 1075 cando = (nblocks - blknum) * fdblk; 1076 bp->b_resid = bp->b_bcount - cando; 1077 if (cando == 0) 1078 goto bad; /* not actually bad but EOF */ 1079 } else { 1080 bp->b_error = EINVAL; 1081 bp->b_flags |= B_ERROR; 1082 goto bad; 1083 } 1084 } 1085 bp->b_pblkno = bp->b_blkno; 1086 s = splbio(); 1087 tqdisksort(&fdc->head, bp); 1088 untimeout(fd_turnoff, (caddr_t)fdu); /* a good idea */ 1089 fdstart(fdcu); 1090 splx(s); 1091 return; 1092 1093 bad: 1094 biodone(bp); 1095 } 1096 1097 /***************************************************************\ 1098 * fdstart * 1099 * We have just queued something.. if the controller is not busy * 1100 * then simulate the case where it has just finished a command * 1101 * So that it (the interrupt routine) looks on the queue for more* 1102 * work to do and picks up what we just added. * 1103 * If the controller is already busy, we need do nothing, as it * 1104 * will pick up our work when the present work completes * 1105 \***************************************************************/ 1106 static void 1107 fdstart(fdcu_t fdcu) 1108 { 1109 int s; 1110 1111 s = splbio(); 1112 if(fdc_data[fdcu].state == DEVIDLE) 1113 { 1114 fdintr(fdcu); 1115 } 1116 splx(s); 1117 } 1118 1119 static void 1120 fd_timeout(void *arg1) 1121 { 1122 fdcu_t fdcu = (fdcu_t)arg1; 1123 fdu_t fdu = fdc_data[fdcu].fdu; 1124 int baseport = fdc_data[fdcu].baseport; 1125 struct buf *bp; 1126 int s; 1127 1128 bp = TAILQ_FIRST(&fdc_data[fdcu].head); 1129 1130 /* 1131 * Due to IBM's brain-dead design, the FDC has a faked ready 1132 * signal, hardwired to ready == true. Thus, any command 1133 * issued if there's no diskette in the drive will _never_ 1134 * complete, and must be aborted by resetting the FDC. 1135 * Many thanks, Big Blue! 1136 */ 1137 1138 s = splbio(); 1139 1140 TRACE1("fd%d[fd_timeout()]", fdu); 1141 /* See if the controller is still busy (patiently awaiting data) */ 1142 if(((inb(baseport + FDSTS)) & (NE7_CB|NE7_RQM)) == NE7_CB) 1143 { 1144 TRACE1("[FDSTS->0x%x]", inb(baseport + FDSTS)); 1145 /* yup, it is; kill it now */ 1146 fdc_reset(&fdc_data[fdcu]); 1147 printf("fd%d: Operation timeout\n", fdu); 1148 } 1149 1150 if (bp) 1151 { 1152 retrier(fdcu); 1153 fdc_data[fdcu].status[0] = NE7_ST0_IC_RC; 1154 fdc_data[fdcu].state = IOTIMEDOUT; 1155 if( fdc_data[fdcu].retry < 6) 1156 fdc_data[fdcu].retry = 6; 1157 } 1158 else 1159 { 1160 fdc_data[fdcu].fd = (fd_p) 0; 1161 fdc_data[fdcu].fdu = -1; 1162 fdc_data[fdcu].state = DEVIDLE; 1163 } 1164 fdintr(fdcu); 1165 splx(s); 1166 } 1167 1168 /* just ensure it has the right spl */ 1169 static void 1170 fd_pseudointr(void *arg1) 1171 { 1172 fdcu_t fdcu = (fdcu_t)arg1; 1173 int s; 1174 1175 s = splbio(); 1176 fdintr(fdcu); 1177 splx(s); 1178 } 1179 1180 /***********************************************************************\ 1181 * fdintr * 1182 * keep calling the state machine until it returns a 0 * 1183 * ALWAYS called at SPLBIO * 1184 \***********************************************************************/ 1185 void 1186 fdintr(fdcu_t fdcu) 1187 { 1188 fdc_p fdc = fdc_data + fdcu; 1189 #if NFT > 0 1190 fdu_t fdu = fdc->fdu; 1191 1192 if (fdc->flags & FDC_TAPE_BUSY) 1193 (ftintr(fdu)); 1194 else 1195 #endif 1196 while(fdstate(fdcu, fdc)) 1197 ; 1198 } 1199 1200 /***********************************************************************\ 1201 * The controller state machine. * 1202 * if it returns a non zero value, it should be called again immediatly * 1203 \***********************************************************************/ 1204 static int 1205 fdstate(fdcu_t fdcu, fdc_p fdc) 1206 { 1207 int read, format, head, sec = 0, sectrac, st0, cyl, st3; 1208 unsigned blknum = 0, b_cylinder = 0; 1209 fdu_t fdu = fdc->fdu; 1210 fd_p fd; 1211 register struct buf *bp; 1212 struct fd_formb *finfo = NULL; 1213 size_t fdblk; 1214 1215 bp = TAILQ_FIRST(&fdc->head); 1216 if(!bp) { 1217 /***********************************************\ 1218 * nothing left for this controller to do * 1219 * Force into the IDLE state, * 1220 \***********************************************/ 1221 fdc->state = DEVIDLE; 1222 if(fdc->fd) 1223 { 1224 printf("fd%d: unexpected valid fd pointer\n", 1225 fdc->fdu); 1226 fdc->fd = (fd_p) 0; 1227 fdc->fdu = -1; 1228 } 1229 TRACE1("[fdc%d IDLE]", fdcu); 1230 return(0); 1231 } 1232 fdu = FDUNIT(minor(bp->b_dev)); 1233 fd = fd_data + fdu; 1234 fdblk = 128 << fd->ft->secsize; 1235 if (fdc->fd && (fd != fdc->fd)) 1236 { 1237 printf("fd%d: confused fd pointers\n", fdu); 1238 } 1239 read = bp->b_flags & B_READ; 1240 format = bp->b_flags & B_FORMAT; 1241 if(format) { 1242 finfo = (struct fd_formb *)bp->b_un.b_addr; 1243 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 1244 - (char *)finfo; 1245 } 1246 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) { 1247 blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk + 1248 fd->skip/fdblk; 1249 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 1250 } 1251 TRACE1("fd%d", fdu); 1252 TRACE1("[%s]", fdstates[fdc->state]); 1253 TRACE1("(0x%x)", fd->flags); 1254 untimeout(fd_turnoff, (caddr_t)fdu); 1255 timeout(fd_turnoff, (caddr_t)fdu, 4 * hz); 1256 switch (fdc->state) 1257 { 1258 case DEVIDLE: 1259 case FINDWORK: /* we have found new work */ 1260 fdc->retry = 0; 1261 fd->skip = 0; 1262 fdc->fd = fd; 1263 fdc->fdu = fdu; 1264 outb(fdc->baseport+FDCTL, fd->ft->trans); 1265 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 1266 /*******************************************************\ 1267 * If the next drive has a motor startup pending, then * 1268 * it will start up in it's own good time * 1269 \*******************************************************/ 1270 if(fd->flags & FD_MOTOR_WAIT) 1271 { 1272 fdc->state = MOTORWAIT; 1273 return(0); /* come back later */ 1274 } 1275 /*******************************************************\ 1276 * Maybe if it's not starting, it SHOULD be starting * 1277 \*******************************************************/ 1278 if (!(fd->flags & FD_MOTOR)) 1279 { 1280 fdc->state = MOTORWAIT; 1281 fd_turnon(fdu); 1282 return(0); 1283 } 1284 else /* at least make sure we are selected */ 1285 { 1286 set_motor(fdcu, fd->fdsu, TURNON); 1287 } 1288 fdc->state = DOSEEK; 1289 break; 1290 case DOSEEK: 1291 if (b_cylinder == (unsigned)fd->track) 1292 { 1293 fdc->state = SEEKCOMPLETE; 1294 break; 1295 } 1296 if (fd_cmd(fdcu, 3, NE7CMD_SEEK, 1297 fd->fdsu, b_cylinder * fd->ft->steptrac, 1298 0)) 1299 { 1300 /* 1301 * seek command not accepted, looks like 1302 * the FDC went off to the Saints... 1303 */ 1304 fdc->retry = 6; /* try a reset */ 1305 return(retrier(fdcu)); 1306 } 1307 fd->track = FD_NO_TRACK; 1308 fdc->state = SEEKWAIT; 1309 return(0); /* will return later */ 1310 case SEEKWAIT: 1311 /* allow heads to settle */ 1312 timeout(fd_pseudointr, (caddr_t)fdcu, hz / 16); 1313 fdc->state = SEEKCOMPLETE; 1314 return(0); /* will return later */ 1315 case SEEKCOMPLETE : /* SEEK DONE, START DMA */ 1316 /* Make sure seek really happened*/ 1317 if(fd->track == FD_NO_TRACK) 1318 { 1319 int descyl = b_cylinder * fd->ft->steptrac; 1320 do { 1321 /* 1322 * This might be a "ready changed" interrupt, 1323 * which cannot really happen since the 1324 * RDY pin is hardwired to + 5 volts. This 1325 * generally indicates a "bouncing" intr 1326 * line, so do one of the following: 1327 * 1328 * When running on an enhanced FDC that is 1329 * known to not go stuck after responding 1330 * with INVALID, fetch all interrupt states 1331 * until seeing either an INVALID or a 1332 * real interrupt condition. 1333 * 1334 * When running on a dumb old NE765, give 1335 * up immediately. The controller will 1336 * provide up to four dummy RC interrupt 1337 * conditions right after reset (for the 1338 * corresponding four drives), so this is 1339 * our only chance to get notice that it 1340 * was not the FDC that caused the interrupt. 1341 */ 1342 if (fd_sense_int(fdc, &st0, &cyl) 1343 == FD_NOT_VALID) 1344 return 0; 1345 if(fdc->fdct == FDC_NE765 1346 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1347 return 0; /* hope for a real intr */ 1348 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1349 1350 if (0 == descyl) 1351 { 1352 int failed = 0; 1353 /* 1354 * seek to cyl 0 requested; make sure we are 1355 * really there 1356 */ 1357 if (fd_sense_drive_status(fdc, &st3)) 1358 failed = 1; 1359 if ((st3 & NE7_ST3_T0) == 0) { 1360 printf( 1361 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 1362 fdu, st3, NE7_ST3BITS); 1363 failed = 1; 1364 } 1365 1366 if (failed) 1367 { 1368 if(fdc->retry < 3) 1369 fdc->retry = 3; 1370 return(retrier(fdcu)); 1371 } 1372 } 1373 1374 if (cyl != descyl) 1375 { 1376 printf( 1377 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 1378 fdu, descyl, cyl, st0); 1379 return(retrier(fdcu)); 1380 } 1381 } 1382 1383 fd->track = b_cylinder; 1384 isa_dmastart(bp->b_flags, bp->b_un.b_addr+fd->skip, 1385 format ? bp->b_bcount : fdblk, fdc->dmachan); 1386 sectrac = fd->ft->sectrac; 1387 sec = blknum % (sectrac * fd->ft->heads); 1388 head = sec / sectrac; 1389 sec = sec % sectrac + 1; 1390 fd->hddrv = ((head&1)<<2)+fdu; 1391 1392 if(format || !read) 1393 { 1394 /* make sure the drive is writable */ 1395 if(fd_sense_drive_status(fdc, &st3) != 0) 1396 { 1397 /* stuck controller? */ 1398 fdc->retry = 6; /* reset the beast */ 1399 return(retrier(fdcu)); 1400 } 1401 if(st3 & NE7_ST3_WP) 1402 { 1403 /* 1404 * XXX YES! this is ugly. 1405 * in order to force the current operation 1406 * to fail, we will have to fake an FDC 1407 * error - all error handling is done 1408 * by the retrier() 1409 */ 1410 fdc->status[0] = NE7_ST0_IC_AT; 1411 fdc->status[1] = NE7_ST1_NW; 1412 fdc->status[2] = 0; 1413 fdc->status[3] = fd->track; 1414 fdc->status[4] = head; 1415 fdc->status[5] = sec; 1416 fdc->retry = 8; /* break out immediately */ 1417 fdc->state = IOTIMEDOUT; /* not really... */ 1418 return (1); 1419 } 1420 } 1421 1422 if(format) 1423 { 1424 /* formatting */ 1425 if(fd_cmd(fdcu, 6, 1426 NE7CMD_FORMAT, 1427 head << 2 | fdu, 1428 finfo->fd_formb_secshift, 1429 finfo->fd_formb_nsecs, 1430 finfo->fd_formb_gaplen, 1431 finfo->fd_formb_fillbyte, 1432 0)) 1433 { 1434 /* controller fell over */ 1435 fdc->retry = 6; 1436 return(retrier(fdcu)); 1437 } 1438 } 1439 else 1440 { 1441 if (fd_cmd(fdcu, 9, 1442 (read ? NE7CMD_READ : NE7CMD_WRITE), 1443 head << 2 | fdu, /* head & unit */ 1444 fd->track, /* track */ 1445 head, 1446 sec, /* sector + 1 */ 1447 fd->ft->secsize, /* sector size */ 1448 sectrac, /* sectors/track */ 1449 fd->ft->gap, /* gap size */ 1450 fd->ft->datalen, /* data length */ 1451 0)) 1452 { 1453 /* the beast is sleeping again */ 1454 fdc->retry = 6; 1455 return(retrier(fdcu)); 1456 } 1457 } 1458 fdc->state = IOCOMPLETE; 1459 timeout(fd_timeout, (caddr_t)fdcu, hz); 1460 return(0); /* will return later */ 1461 case IOCOMPLETE: /* IO DONE, post-analyze */ 1462 untimeout(fd_timeout, (caddr_t)fdcu); 1463 1464 if (fd_read_status(fdc, fd->fdsu)) 1465 { 1466 if (fdc->retry < 6) 1467 fdc->retry = 6; /* force a reset */ 1468 return retrier(fdcu); 1469 } 1470 1471 fdc->state = IOTIMEDOUT; 1472 1473 /* FALLTHROUGH */ 1474 1475 case IOTIMEDOUT: 1476 isa_dmadone(bp->b_flags, bp->b_un.b_addr+fd->skip, 1477 format ? bp->b_bcount : fdblk, fdc->dmachan); 1478 if (fdc->status[0] & NE7_ST0_IC) 1479 { 1480 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1481 && fdc->status[1] & NE7_ST1_OR) { 1482 /* 1483 * DMA overrun. Someone hogged the bus 1484 * and didn't release it in time for the 1485 * next FDC transfer. 1486 * Just restart it, don't increment retry 1487 * count. (vak) 1488 */ 1489 fdc->state = SEEKCOMPLETE; 1490 return (1); 1491 } 1492 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 1493 && fdc->retry < 6) 1494 fdc->retry = 6; /* force a reset */ 1495 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1496 && fdc->status[2] & NE7_ST2_WC 1497 && fdc->retry < 3) 1498 fdc->retry = 3; /* force recalibrate */ 1499 return(retrier(fdcu)); 1500 } 1501 /* All OK */ 1502 fd->skip += fdblk; 1503 if (!format && fd->skip < bp->b_bcount - bp->b_resid) 1504 { 1505 /* set up next transfer */ 1506 fdc->state = DOSEEK; 1507 } 1508 else 1509 { 1510 /* ALL DONE */ 1511 fd->skip = 0; 1512 TAILQ_REMOVE(&fdc->head, bp, b_act); 1513 biodone(bp); 1514 fdc->fd = (fd_p) 0; 1515 fdc->fdu = -1; 1516 fdc->state = FINDWORK; 1517 } 1518 return(1); 1519 case RESETCTLR: 1520 fdc_reset(fdc); 1521 fdc->retry++; 1522 fdc->state = STARTRECAL; 1523 break; 1524 case STARTRECAL: 1525 /* XXX clear the fdc results from the last reset, if any. */ 1526 { 1527 int i; 1528 for (i = 0; i < 4; i++) 1529 (void)fd_sense_int(fdc, &st0, &cyl); 1530 } 1531 1532 if(fd_cmd(fdcu, 1533 2, NE7CMD_RECAL, fdu, 1534 0)) /* Recalibrate Function */ 1535 { 1536 /* arrgl */ 1537 fdc->retry = 6; 1538 return(retrier(fdcu)); 1539 } 1540 fdc->state = RECALWAIT; 1541 return(0); /* will return later */ 1542 case RECALWAIT: 1543 /* allow heads to settle */ 1544 timeout(fd_pseudointr, (caddr_t)fdcu, hz / 8); 1545 fdc->state = RECALCOMPLETE; 1546 return(0); /* will return later */ 1547 case RECALCOMPLETE: 1548 do { 1549 /* 1550 * See SEEKCOMPLETE for a comment on this: 1551 */ 1552 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 1553 return 0; 1554 if(fdc->fdct == FDC_NE765 1555 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1556 return 0; /* hope for a real intr */ 1557 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1558 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 1559 { 1560 if(fdc->retry > 3) 1561 /* 1562 * a recalibrate from beyond cylinder 77 1563 * will "fail" due to the FDC limitations; 1564 * since people used to complain much about 1565 * the failure message, try not logging 1566 * this one if it seems to be the first 1567 * time in a line 1568 */ 1569 printf("fd%d: recal failed ST0 %b cyl %d\n", 1570 fdu, st0, NE7_ST0BITS, cyl); 1571 if(fdc->retry < 3) fdc->retry = 3; 1572 return(retrier(fdcu)); 1573 } 1574 fd->track = 0; 1575 /* Seek (probably) necessary */ 1576 fdc->state = DOSEEK; 1577 return(1); /* will return immediatly */ 1578 case MOTORWAIT: 1579 if(fd->flags & FD_MOTOR_WAIT) 1580 { 1581 return(0); /* time's not up yet */ 1582 } 1583 /* 1584 * since the controller was off, it has lost its 1585 * idea about the current track it were; thus, 1586 * recalibrate the bastard 1587 */ 1588 fdc->state = STARTRECAL; 1589 return(1); /* will return immediatly */ 1590 default: 1591 printf("fdc%d: Unexpected FD int->", fdcu); 1592 if (fd_read_status(fdc, fd->fdsu) == 0) 1593 printf("FDC status :%lx %lx %lx %lx %lx %lx %lx ", 1594 fdc->status[0], 1595 fdc->status[1], 1596 fdc->status[2], 1597 fdc->status[3], 1598 fdc->status[4], 1599 fdc->status[5], 1600 fdc->status[6] ); 1601 else 1602 printf("No status available "); 1603 if (fd_sense_int(fdc, &st0, &cyl) != 0) 1604 { 1605 printf("[controller is dead now]\n"); 1606 return(0); 1607 } 1608 printf("ST0 = %x, PCN = %x\n", st0, cyl); 1609 return(0); 1610 } 1611 /*XXX confusing: some branches return immediately, others end up here*/ 1612 return(1); /* Come back immediatly to new state */ 1613 } 1614 1615 static int 1616 retrier(fdcu) 1617 fdcu_t fdcu; 1618 { 1619 fdc_p fdc = fdc_data + fdcu; 1620 register struct buf *bp; 1621 1622 bp = TAILQ_FIRST(&fdc->head); 1623 1624 if(fd_data[FDUNIT(minor(bp->b_dev))].options & FDOPT_NORETRY) 1625 goto fail; 1626 switch(fdc->retry) 1627 { 1628 case 0: case 1: case 2: 1629 fdc->state = SEEKCOMPLETE; 1630 break; 1631 case 3: case 4: case 5: 1632 fdc->state = STARTRECAL; 1633 break; 1634 case 6: 1635 fdc->state = RESETCTLR; 1636 break; 1637 case 7: 1638 break; 1639 default: 1640 fail: 1641 { 1642 dev_t sav_b_dev = bp->b_dev; 1643 /* Trick diskerr */ 1644 bp->b_dev = makedev(major(bp->b_dev), 1645 (FDUNIT(minor(bp->b_dev))<<3)|RAW_PART); 1646 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1647 fdc->fd->skip / DEV_BSIZE, 1648 (struct disklabel *)NULL); 1649 bp->b_dev = sav_b_dev; 1650 if (fdc->flags & FDC_STAT_VALID) 1651 { 1652 printf( 1653 " (ST0 %b ST1 %b ST2 %b cyl %ld hd %ld sec %ld)\n", 1654 fdc->status[0], NE7_ST0BITS, 1655 fdc->status[1], NE7_ST1BITS, 1656 fdc->status[2], NE7_ST2BITS, 1657 fdc->status[3], fdc->status[4], 1658 fdc->status[5]); 1659 } 1660 else 1661 printf(" (No status)\n"); 1662 } 1663 bp->b_flags |= B_ERROR; 1664 bp->b_error = EIO; 1665 bp->b_resid += bp->b_bcount - fdc->fd->skip; 1666 TAILQ_REMOVE(&fdc->head, bp, b_act); 1667 fdc->fd->skip = 0; 1668 biodone(bp); 1669 fdc->state = FINDWORK; 1670 fdc->fd = (fd_p) 0; 1671 fdc->fdu = -1; 1672 /* XXX abort current command, if any. */ 1673 return(1); 1674 } 1675 fdc->retry++; 1676 return(1); 1677 } 1678 1679 static int 1680 fdformat(dev, finfo, p) 1681 dev_t dev; 1682 struct fd_formb *finfo; 1683 struct proc *p; 1684 { 1685 fdu_t fdu; 1686 fd_p fd; 1687 1688 struct buf *bp; 1689 int rv = 0, s; 1690 size_t fdblk; 1691 1692 fdu = FDUNIT(minor(dev)); 1693 fd = &fd_data[fdu]; 1694 fdblk = 128 << fd->ft->secsize; 1695 1696 /* set up a buffer header for fdstrategy() */ 1697 bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT); 1698 if(bp == 0) 1699 return ENOBUFS; 1700 /* 1701 * keep the process from being swapped 1702 */ 1703 p->p_flag |= P_PHYSIO; 1704 bzero((void *)bp, sizeof(struct buf)); 1705 bp->b_flags = B_BUSY | B_PHYS | B_FORMAT; 1706 bp->b_proc = p; 1707 bp->b_dev = dev; 1708 1709 /* 1710 * calculate a fake blkno, so fdstrategy() would initiate a 1711 * seek to the requested cylinder 1712 */ 1713 bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads) 1714 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE; 1715 1716 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; 1717 bp->b_un.b_addr = (caddr_t)finfo; 1718 1719 /* now do the format */ 1720 fdstrategy(bp); 1721 1722 /* ...and wait for it to complete */ 1723 s = splbio(); 1724 while(!(bp->b_flags & B_DONE)) 1725 { 1726 rv = tsleep((caddr_t)bp, PRIBIO, "fdform", 20 * hz); 1727 if(rv == EWOULDBLOCK) 1728 break; 1729 } 1730 splx(s); 1731 1732 if(rv == EWOULDBLOCK) { 1733 /* timed out */ 1734 rv = EIO; 1735 biodone(bp); 1736 } 1737 if(bp->b_flags & B_ERROR) 1738 rv = bp->b_error; 1739 /* 1740 * allow the process to be swapped 1741 */ 1742 p->p_flag &= ~P_PHYSIO; 1743 free(bp, M_TEMP); 1744 return rv; 1745 } 1746 1747 /* 1748 * TODO: don't allocate buffer on stack. 1749 */ 1750 1751 int 1752 fdioctl(dev, cmd, addr, flag, p) 1753 dev_t dev; 1754 int cmd; 1755 caddr_t addr; 1756 int flag; 1757 struct proc *p; 1758 { 1759 fdu_t fdu = FDUNIT(minor(dev)); 1760 fd_p fd = &fd_data[fdu]; 1761 size_t fdblk; 1762 1763 struct fd_type *fdt; 1764 struct disklabel *dl; 1765 char buffer[DEV_BSIZE]; 1766 int error = 0; 1767 1768 #if NFT > 0 1769 int type = FDTYPE(minor(dev)); 1770 1771 /* check for a tape ioctl */ 1772 if (type & F_TAPE_TYPE) 1773 return ftioctl(dev, cmd, addr, flag, p); 1774 #endif 1775 1776 fdblk = 128 << fd->ft->secsize; 1777 1778 switch (cmd) 1779 { 1780 case DIOCGDINFO: 1781 bzero(buffer, sizeof (buffer)); 1782 dl = (struct disklabel *)buffer; 1783 dl->d_secsize = fdblk; 1784 fdt = fd_data[FDUNIT(minor(dev))].ft; 1785 dl->d_secpercyl = fdt->size / fdt->tracks; 1786 dl->d_type = DTYPE_FLOPPY; 1787 1788 if (readdisklabel(dkmodpart(dev, RAW_PART), fdstrategy, dl) 1789 == NULL) 1790 error = 0; 1791 else 1792 error = EINVAL; 1793 1794 *(struct disklabel *)addr = *dl; 1795 break; 1796 1797 case DIOCSDINFO: 1798 if ((flag & FWRITE) == 0) 1799 error = EBADF; 1800 break; 1801 1802 case DIOCWLABEL: 1803 if ((flag & FWRITE) == 0) 1804 error = EBADF; 1805 break; 1806 1807 case DIOCWDINFO: 1808 if ((flag & FWRITE) == 0) 1809 { 1810 error = EBADF; 1811 break; 1812 } 1813 1814 dl = (struct disklabel *)addr; 1815 1816 if ((error = setdisklabel((struct disklabel *)buffer, dl, 1817 (u_long)0)) != 0) 1818 break; 1819 1820 error = writedisklabel(dev, fdstrategy, 1821 (struct disklabel *)buffer); 1822 break; 1823 1824 case FD_FORM: 1825 if((flag & FWRITE) == 0) 1826 error = EBADF; /* must be opened for writing */ 1827 else if(((struct fd_formb *)addr)->format_version != 1828 FD_FORMAT_VERSION) 1829 error = EINVAL; /* wrong version of formatting prog */ 1830 else 1831 error = fdformat(dev, (struct fd_formb *)addr, p); 1832 break; 1833 1834 case FD_GTYPE: /* get drive type */ 1835 *(struct fd_type *)addr = *fd_data[FDUNIT(minor(dev))].ft; 1836 break; 1837 1838 case FD_STYPE: /* set drive type */ 1839 /* this is considered harmful; only allow for superuser */ 1840 if(suser(p->p_ucred, &p->p_acflag) != 0) 1841 return EPERM; 1842 *fd_data[FDUNIT(minor(dev))].ft = *(struct fd_type *)addr; 1843 break; 1844 1845 case FD_GOPTS: /* get drive options */ 1846 *(int *)addr = fd_data[FDUNIT(minor(dev))].options; 1847 break; 1848 1849 case FD_SOPTS: /* set drive options */ 1850 fd_data[FDUNIT(minor(dev))].options = *(int *)addr; 1851 break; 1852 1853 default: 1854 error = ENOTTY; 1855 break; 1856 } 1857 return (error); 1858 } 1859 1860 1861 static fd_devsw_installed = 0; 1862 1863 static void fd_drvinit(void *notused ) 1864 { 1865 1866 if( ! fd_devsw_installed ) { 1867 bdevsw_add_generic(BDEV_MAJOR,CDEV_MAJOR, &fd_bdevsw); 1868 fd_devsw_installed = 1; 1869 } 1870 } 1871 1872 SYSINIT(fddev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,fd_drvinit,NULL) 1873 1874 #endif 1875 /* 1876 * Hello emacs, these are the 1877 * Local Variables: 1878 * c-indent-level: 8 1879 * c-continued-statement-offset: 8 1880 * c-continued-brace-offset: 0 1881 * c-brace-offset: -8 1882 * c-brace-imaginary-offset: 0 1883 * c-argdecl-indent: 8 1884 * c-label-offset: -8 1885 * c++-hanging-braces: 1 1886 * c++-access-specifier-offset: -8 1887 * c++-empty-arglist-indent: 8 1888 * c++-friend-offset: 0 1889 * End: 1890 */ 1891