1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Don Ahn. 7 * 8 * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu) 9 * aided by the Linux floppy driver modifications from David Bateman 10 * (dbateman@eng.uts.edu.au). 11 * 12 * Copyright (c) 1993, 1994 by 13 * jc@irbs.UUCP (John Capo) 14 * vak@zebub.msk.su (Serge Vakulenko) 15 * ache@astral.msk.su (Andrew A. Chernov) 16 * 17 * Copyright (c) 1993, 1994, 1995 by 18 * joerg_wunsch@uriah.sax.de (Joerg Wunsch) 19 * dufault@hda.com (Peter Dufault) 20 * 21 * Copyright (c) 2001 Joerg Wunsch, 22 * joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) 23 * 24 * Redistribution and use in source and binary forms, with or without 25 * modification, are permitted provided that the following conditions 26 * are met: 27 * 1. Redistributions of source code must retain the above copyright 28 * notice, this list of conditions and the following disclaimer. 29 * 2. Redistributions in binary form must reproduce the above copyright 30 * notice, this list of conditions and the following disclaimer in the 31 * documentation and/or other materials provided with the distribution. 32 * 4. Neither the name of the University nor the names of its contributors 33 * may be used to endorse or promote products derived from this software 34 * without specific prior written permission. 35 * 36 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 37 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 39 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 40 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 41 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 42 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 44 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 45 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 46 * SUCH DAMAGE. 47 * 48 * from: @(#)fd.c 7.4 (Berkeley) 5/25/91 49 */ 50 51 #include <sys/cdefs.h> 52 __FBSDID("$FreeBSD$"); 53 54 #include "opt_fdc.h" 55 56 #include <sys/param.h> 57 #include <sys/bio.h> 58 #include <sys/bus.h> 59 #include <sys/devicestat.h> 60 #include <sys/disk.h> 61 #include <sys/fcntl.h> 62 #include <sys/fdcio.h> 63 #include <sys/filio.h> 64 #include <sys/kernel.h> 65 #include <sys/lock.h> 66 #include <sys/malloc.h> 67 #include <sys/module.h> 68 #include <sys/mutex.h> 69 #include <sys/proc.h> 70 #include <sys/rman.h> 71 #include <sys/systm.h> 72 73 #include <machine/bus.h> 74 #include <machine/clock.h> 75 #include <machine/stdarg.h> 76 77 #include <isa/isavar.h> 78 #include <isa/isareg.h> 79 #include <dev/fdc/fdcreg.h> 80 #include <dev/fdc/fdcvar.h> 81 #include <isa/rtc.h> 82 83 #define FDBIO_FORMAT BIO_CMD2 84 85 /* configuration flags for fdc */ 86 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ 87 88 /* 89 * Stop retrying after this many DMA overruns. Since each retry takes 90 * one revolution, with 300 rpm., 25 retries take approximately 5 91 * seconds which the read attempt will block in case the DMA overrun 92 * is persistent. 93 */ 94 #define FDC_DMAOV_MAX 25 95 96 /* 97 * Timeout value for the PIO loops to wait until the FDC main status 98 * register matches our expectations (request for master, direction 99 * bit). This is supposed to be a number of microseconds, although 100 * timing might actually not be very accurate. 101 * 102 * Timeouts of 100 msec are believed to be required for some broken 103 * (old) hardware. 104 */ 105 #define FDSTS_TIMEOUT 100000 106 107 /* 108 * Number of subdevices that can be used for different density types. 109 */ 110 #define NUMDENS 16 111 112 #define FDBIO_RDSECTID BIO_CMD1 113 114 /* 115 * List of native drive densities. Order must match enum fd_drivetype 116 * in <sys/fdcio.h>. Upon attaching the drive, each of the 117 * programmable subdevices is initialized with the native density 118 * definition. 119 */ 120 static struct fd_type fd_native_types[] = 121 { 122 { 0 }, /* FDT_NONE */ 123 { 9,2,0xFF,0x2A,40, 720,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_360K */ 124 { 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* FDT_12M */ 125 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_720K */ 126 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */ 127 #if 0 /* we currently don't handle 2.88 MB */ 128 { 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /*FDT_288M*/ 129 #else 130 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */ 131 #endif 132 }; 133 134 /* 135 * 360 KB 5.25" and 720 KB 3.5" drives don't have automatic density 136 * selection, they just start out with their native density (or lose). 137 * So 1.2 MB 5.25", 1.44 MB 3.5", and 2.88 MB 3.5" drives have their 138 * respective lists of densities to search for. 139 */ 140 static struct fd_type fd_searchlist_12m[] = { 141 { 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* 1.2M */ 142 { 9,2,0xFF,0x23,40, 720,FDC_300KBPS,2,0x50,1,0,FL_MFM|FL_2STEP }, /* 360K */ 143 { 9,2,0xFF,0x20,80,1440,FDC_300KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 144 }; 145 146 static struct fd_type fd_searchlist_144m[] = { 147 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */ 148 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 149 }; 150 151 /* We search for 1.44M first since this is the most common case. */ 152 static struct fd_type fd_searchlist_288m[] = { 153 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */ 154 #if 0 155 { 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /* 2.88M */ 156 #endif 157 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 158 }; 159 160 #define MAX_SEC_SIZE (128 << 3) 161 #define MAX_CYLINDER 85 /* some people really stress their drives 162 * up to cyl 82 */ 163 #define MAX_HEAD 1 164 165 devclass_t fdc_devclass; 166 167 /* 168 * Per drive structure (softc). 169 */ 170 struct fd_data { 171 struct fdc_data *fdc; /* pointer to controller structure */ 172 int fdsu; /* this units number on this controller */ 173 enum fd_drivetype type; /* drive type */ 174 struct fd_type *ft; /* pointer to current type descriptor */ 175 struct fd_type fts[NUMDENS]; /* type descriptors */ 176 int flags; 177 #define FD_OPEN 0x01 /* it's open */ 178 #define FD_NONBLOCK 0x02 /* O_NONBLOCK set */ 179 #define FD_ACTIVE 0x04 /* it's active */ 180 #define FD_MOTOR 0x08 /* motor should be on */ 181 #define FD_MOTOR_WAIT 0x10 /* motor coming up */ 182 #define FD_UA 0x20 /* force unit attention */ 183 int skip; 184 int hddrv; 185 #define FD_NO_TRACK -2 186 int track; /* where we think the head is */ 187 int options; /* user configurable options, see fdcio.h */ 188 struct callout_handle toffhandle; 189 struct callout_handle tohandle; 190 struct devstat *device_stats; 191 struct cdev *masterdev; 192 device_t dev; 193 fdu_t fdu; 194 }; 195 196 struct fdc_ivars { 197 int fdunit; 198 int fdtype; 199 }; 200 201 static devclass_t fd_devclass; 202 203 /* configuration flags for fd */ 204 #define FD_TYPEMASK 0x0f /* drive type, matches enum 205 * fd_drivetype; on i386 machines, if 206 * given as 0, use RTC type for fd0 207 * and fd1 */ 208 #define FD_DTYPE(flags) ((flags) & FD_TYPEMASK) 209 #define FD_NO_CHLINE 0x10 /* drive does not support changeline 210 * aka. unit attention */ 211 #define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just 212 * assume it is there */ 213 214 /* 215 * Throughout this file the following conventions will be used: 216 * 217 * fd is a pointer to the fd_data struct for the drive in question 218 * fdc is a pointer to the fdc_data struct for the controller 219 * fdu is the floppy drive unit number 220 * fdcu is the floppy controller unit number 221 * fdsu is the floppy drive unit number on that controller. (sub-unit) 222 */ 223 224 /* 225 * Function declarations, same (chaotic) order as they appear in the 226 * file. Re-ordering is too late now, it would only obfuscate the 227 * diffs against old and offspring versions (like the PC98 one). 228 * 229 * Anyone adding functions here, please keep this sequence the same 230 * as below -- makes locating a particular function in the body much 231 * easier. 232 */ 233 static u_int8_t fdsts_rd(fdc_p); 234 static void fddata_wr(fdc_p, u_int8_t); 235 static u_int8_t fddata_rd(fdc_p); 236 #if 0 237 static u_int8_t fdin_rd(fdc_p); 238 #endif 239 static int fdc_err(struct fdc_data *, const char *); 240 static int enable_fifo(fdc_p fdc); 241 static int fd_sense_drive_status(fdc_p, int *); 242 static int fd_sense_int(fdc_p, int *, int *); 243 static int fd_read_status(fdc_p); 244 static int fd_probe(device_t); 245 static int fd_attach(device_t); 246 static int fd_detach(device_t); 247 static void set_motor(struct fdc_data *, int, int); 248 # define TURNON 1 249 # define TURNOFF 0 250 static timeout_t fd_turnoff; 251 static timeout_t fd_motor_on; 252 static void fd_turnon(struct fd_data *); 253 static void fdc_reset(fdc_p); 254 static int fd_in(struct fdc_data *, int *); 255 static int out_fdc(struct fdc_data *, int); 256 static d_open_t fdopen; 257 static d_close_t fdclose; 258 static d_strategy_t fdstrategy; 259 static void fdstart(struct fdc_data *); 260 static timeout_t fd_iotimeout; 261 static timeout_t fd_pseudointr; 262 static driver_intr_t fdc_intr; 263 static int fdcpio(fdc_p, long, caddr_t, u_int); 264 static int fdautoselect(struct cdev *); 265 static int fdstate(struct fdc_data *); 266 static int retrier(struct fdc_data *); 267 static void fdbiodone(struct bio *); 268 static int fdmisccmd(struct cdev *, u_int, void *); 269 static d_ioctl_t fdioctl; 270 271 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 272 273 #ifdef FDC_DEBUG 274 /* CAUTION: fd_debug causes huge amounts of logging output */ 275 static int volatile fd_debug = 0; 276 #define TRACE0(arg) do { if (fd_debug) printf(arg); } while (0) 277 #define TRACE1(arg1, arg2) do { if (fd_debug) printf(arg1, arg2); } while (0) 278 #else /* FDC_DEBUG */ 279 #define TRACE0(arg) do { } while (0) 280 #define TRACE1(arg1, arg2) do { } while (0) 281 #endif /* FDC_DEBUG */ 282 283 /* 284 * Bus space handling (access to low-level IO). 285 */ 286 void 287 fdout_wr(fdc_p fdc, u_int8_t v) 288 { 289 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 290 } 291 292 static u_int8_t 293 fdsts_rd(fdc_p fdc) 294 { 295 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 296 } 297 298 static void 299 fddata_wr(fdc_p fdc, u_int8_t v) 300 { 301 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 302 } 303 304 static u_int8_t 305 fddata_rd(fdc_p fdc) 306 { 307 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 308 } 309 310 static u_int8_t 311 fdin_rd(fdc_p fdc) 312 { 313 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 314 } 315 316 static struct cdevsw fd_cdevsw = { 317 .d_version = D_VERSION, 318 .d_open = fdopen, 319 .d_close = fdclose, 320 .d_read = physread, 321 .d_write = physwrite, 322 .d_ioctl = fdioctl, 323 .d_strategy = fdstrategy, 324 .d_name = "fd", 325 .d_flags = D_DISK | D_NEEDGIANT, 326 }; 327 328 /* 329 * Auxiliary functions. Well, some only. Others are scattered 330 * throughout the entire file. 331 */ 332 static int 333 fdc_err(struct fdc_data *fdc, const char *s) 334 { 335 fdc->fdc_errs++; 336 if (s) { 337 if (fdc->fdc_errs < FDC_ERRMAX) 338 device_printf(fdc->fdc_dev, "%s", s); 339 else if (fdc->fdc_errs == FDC_ERRMAX) 340 device_printf(fdc->fdc_dev, "too many errors, not " 341 "logging any more\n"); 342 } 343 344 return FD_FAILED; 345 } 346 347 /* 348 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 349 * Unit number, 350 * # of output bytes, output bytes as ints ..., 351 * # of input bytes, input bytes as ints ... 352 */ 353 int 354 fd_cmd(struct fdc_data *fdc, int n_out, ...) 355 { 356 u_char cmd; 357 int n_in; 358 int n; 359 va_list ap; 360 361 va_start(ap, n_out); 362 cmd = (u_char)(va_arg(ap, int)); 363 va_end(ap); 364 va_start(ap, n_out); 365 for (n = 0; n < n_out; n++) 366 { 367 if (out_fdc(fdc, va_arg(ap, int)) < 0) 368 { 369 char msg[50]; 370 snprintf(msg, sizeof(msg), 371 "cmd %x failed at out byte %d of %d\n", 372 cmd, n + 1, n_out); 373 return fdc_err(fdc, msg); 374 } 375 } 376 n_in = va_arg(ap, int); 377 for (n = 0; n < n_in; n++) 378 { 379 int *ptr = va_arg(ap, int *); 380 if (fd_in(fdc, ptr) < 0) 381 { 382 char msg[50]; 383 snprintf(msg, sizeof(msg), 384 "cmd %02x failed at in byte %d of %d\n", 385 cmd, n + 1, n_in); 386 return fdc_err(fdc, msg); 387 } 388 } 389 390 return 0; 391 } 392 393 static int 394 enable_fifo(fdc_p fdc) 395 { 396 int i, j; 397 398 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 399 400 /* 401 * Cannot use fd_cmd the normal way here, since 402 * this might be an invalid command. Thus we send the 403 * first byte, and check for an early turn of data directon. 404 */ 405 406 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 407 return fdc_err(fdc, "Enable FIFO failed\n"); 408 409 /* If command is invalid, return */ 410 j = FDSTS_TIMEOUT; 411 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 412 != NE7_RQM && j-- > 0) { 413 if (i == (NE7_DIO | NE7_RQM)) { 414 fdc_reset(fdc); 415 return FD_FAILED; 416 } 417 DELAY(1); 418 } 419 if (j<0 || 420 fd_cmd(fdc, 3, 421 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 422 fdc_reset(fdc); 423 return fdc_err(fdc, "Enable FIFO failed\n"); 424 } 425 fdc->flags |= FDC_HAS_FIFO; 426 return 0; 427 } 428 if (fd_cmd(fdc, 4, 429 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 430 return fdc_err(fdc, "Re-enable FIFO failed\n"); 431 return 0; 432 } 433 434 static int 435 fd_sense_drive_status(fdc_p fdc, int *st3p) 436 { 437 int st3; 438 439 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 440 { 441 return fdc_err(fdc, "Sense Drive Status failed\n"); 442 } 443 if (st3p) 444 *st3p = st3; 445 446 return 0; 447 } 448 449 static int 450 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 451 { 452 int cyl, st0, ret; 453 454 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 455 if (ret) { 456 (void)fdc_err(fdc, 457 "sense intr err reading stat reg 0\n"); 458 return ret; 459 } 460 461 if (st0p) 462 *st0p = st0; 463 464 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 465 /* 466 * There doesn't seem to have been an interrupt. 467 */ 468 return FD_NOT_VALID; 469 } 470 471 if (fd_in(fdc, &cyl) < 0) { 472 return fdc_err(fdc, "can't get cyl num\n"); 473 } 474 475 if (cylp) 476 *cylp = cyl; 477 478 return 0; 479 } 480 481 482 static int 483 fd_read_status(fdc_p fdc) 484 { 485 int i, ret; 486 487 for (i = ret = 0; i < 7; i++) { 488 /* 489 * XXX types are poorly chosen. Only bytes can be read 490 * from the hardware, but fdc->status[] wants u_ints and 491 * fd_in() gives ints. 492 */ 493 int status; 494 495 ret = fd_in(fdc, &status); 496 fdc->status[i] = status; 497 if (ret != 0) 498 break; 499 } 500 501 if (ret == 0) 502 fdc->flags |= FDC_STAT_VALID; 503 else 504 fdc->flags &= ~FDC_STAT_VALID; 505 506 return ret; 507 } 508 509 void 510 fdc_release_resources(struct fdc_data *fdc) 511 { 512 device_t dev; 513 514 dev = fdc->fdc_dev; 515 if (fdc->fdc_intr) { 516 BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq, 517 fdc->fdc_intr); 518 fdc->fdc_intr = NULL; 519 } 520 if (fdc->res_irq != 0) { 521 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 522 fdc->res_irq); 523 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 524 fdc->res_irq); 525 fdc->res_irq = NULL; 526 } 527 if (fdc->res_ctl != 0) { 528 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 529 fdc->res_ctl); 530 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 531 fdc->res_ctl); 532 fdc->res_ctl = NULL; 533 } 534 if (fdc->res_ioport != 0) { 535 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 536 fdc->res_ioport); 537 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 538 fdc->res_ioport); 539 fdc->res_ioport = NULL; 540 } 541 if (fdc->res_drq != 0) { 542 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 543 fdc->res_drq); 544 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 545 fdc->res_drq); 546 fdc->res_drq = NULL; 547 } 548 } 549 550 /* 551 * Configuration/initialization stuff, per controller. 552 */ 553 554 int 555 fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 556 { 557 struct fdc_ivars *ivars = device_get_ivars(child); 558 559 switch (which) { 560 case FDC_IVAR_FDUNIT: 561 *result = ivars->fdunit; 562 break; 563 case FDC_IVAR_FDTYPE: 564 *result = ivars->fdtype; 565 break; 566 default: 567 return (ENOENT); 568 } 569 return (0); 570 } 571 572 int 573 fdc_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 574 { 575 struct fdc_ivars *ivars = device_get_ivars(child); 576 577 switch (which) { 578 case FDC_IVAR_FDUNIT: 579 ivars->fdunit = value; 580 break; 581 case FDC_IVAR_FDTYPE: 582 ivars->fdtype = value; 583 break; 584 default: 585 return (ENOENT); 586 } 587 return (0); 588 } 589 590 int 591 fdc_initial_reset(struct fdc_data *fdc) 592 { 593 /* First, reset the floppy controller. */ 594 fdout_wr(fdc, 0); 595 DELAY(100); 596 fdout_wr(fdc, FDO_FRST); 597 598 /* Then, see if it can handle a command. */ 599 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 600 NE7_SPEC_2(2, 0), 0)) 601 return (ENXIO); 602 return (0); 603 } 604 605 int 606 fdc_detach(device_t dev) 607 { 608 struct fdc_data *fdc; 609 int error; 610 611 fdc = device_get_softc(dev); 612 613 /* have our children detached first */ 614 if ((error = bus_generic_detach(dev))) 615 return (error); 616 617 /* reset controller, turn motor off */ 618 fdout_wr(fdc, 0); 619 620 fdc_release_resources(fdc); 621 return (0); 622 } 623 624 /* 625 * Add a child device to the fdc controller. It will then be probed etc. 626 */ 627 device_t 628 fdc_add_child(device_t dev, const char *name, int unit) 629 { 630 int flags; 631 struct fdc_ivars *ivar; 632 device_t child; 633 634 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO); 635 if (ivar == NULL) 636 return (NULL); 637 child = device_add_child(dev, name, unit); 638 if (child == NULL) { 639 free(ivar, M_DEVBUF); 640 return (NULL); 641 } 642 device_set_ivars(child, ivar); 643 ivar->fdunit = unit; 644 ivar->fdtype = FDT_NONE; 645 if (resource_int_value(name, unit, "flags", &flags) == 0) 646 device_set_flags(child, flags); 647 if (resource_disabled(name, unit)) 648 device_disable(child); 649 return (child); 650 } 651 652 int 653 fdc_attach(device_t dev) 654 { 655 struct fdc_data *fdc; 656 int error; 657 658 fdc = device_get_softc(dev); 659 fdc->fdc_dev = dev; 660 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 661 INTR_TYPE_BIO | INTR_ENTROPY, fdc_intr, fdc, 662 &fdc->fdc_intr); 663 if (error) { 664 device_printf(dev, "cannot setup interrupt\n"); 665 return error; 666 } 667 fdc->fdcu = device_get_unit(dev); 668 fdc->flags |= FDC_NEEDS_RESET; 669 670 fdc->state = DEVIDLE; 671 672 /* reset controller, turn motor off, clear fdout mirror reg */ 673 fdout_wr(fdc, fdc->fdout = 0); 674 bioq_init(&fdc->head); 675 676 return (0); 677 } 678 679 int 680 fdc_hints_probe(device_t dev) 681 { 682 const char *name, *dname; 683 int i, error, dunit; 684 685 /* 686 * Probe and attach any children. We should probably detect 687 * devices from the BIOS unless overridden. 688 */ 689 name = device_get_nameunit(dev); 690 i = 0; 691 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) { 692 resource_int_value(dname, dunit, "drive", &dunit); 693 fdc_add_child(dev, dname, dunit); 694 } 695 696 if ((error = bus_generic_attach(dev)) != 0) 697 return (error); 698 return (0); 699 } 700 701 int 702 fdc_print_child(device_t me, device_t child) 703 { 704 int retval = 0, flags; 705 706 retval += bus_print_child_header(me, child); 707 retval += printf(" on %s drive %d", device_get_nameunit(me), 708 fdc_get_fdunit(child)); 709 if ((flags = device_get_flags(me)) != 0) 710 retval += printf(" flags %#x", flags); 711 retval += printf("\n"); 712 713 return (retval); 714 } 715 716 /* 717 * Configuration/initialization, per drive. 718 */ 719 static int 720 fd_probe(device_t dev) 721 { 722 int i; 723 u_int st0, st3; 724 struct fd_data *fd; 725 struct fdc_data *fdc; 726 fdsu_t fdsu; 727 int flags, type; 728 729 fdsu = fdc_get_fdunit(dev); 730 fd = device_get_softc(dev); 731 fdc = device_get_softc(device_get_parent(dev)); 732 flags = device_get_flags(dev); 733 734 fd->dev = dev; 735 fd->fdc = fdc; 736 fd->fdsu = fdsu; 737 fd->fdu = device_get_unit(dev); 738 739 /* Auto-probe if fdinfo is present, but always allow override. */ 740 type = FD_DTYPE(flags); 741 if (type == FDT_NONE && (type = fdc_get_fdtype(dev)) != FDT_NONE) { 742 fd->type = type; 743 goto done; 744 } else { 745 /* make sure fdautoselect() will be called */ 746 fd->flags = FD_UA; 747 fd->type = type; 748 } 749 750 /* 751 * XXX I think using __i386__ is wrong here since we actually want to probe 752 * for the machine type, not the CPU type (so non-PC arch's like the PC98 will 753 * fail the probe). However, for whatever reason, testing for _MACHINE_ARCH 754 * == i386 breaks the test on FreeBSD/Alpha. 755 */ 756 #if defined(__i386__) || defined(__amd64__) 757 if (fd->type == FDT_NONE && (fd->fdu == 0 || fd->fdu == 1)) { 758 /* Look up what the BIOS thinks we have. */ 759 if (fd->fdu == 0) { 760 if ((fdc->flags & FDC_ISPCMCIA)) 761 /* 762 * Somewhat special. No need to force the 763 * user to set device flags, since the Y-E 764 * Data PCMCIA floppy is always a 1.44 MB 765 * device. 766 */ 767 fd->type = FDT_144M; 768 else 769 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4; 770 } else { 771 fd->type = rtcin(RTC_FDISKETTE) & 0x0f; 772 } 773 if (fd->type == FDT_288M_1) 774 fd->type = FDT_288M; 775 } 776 #endif /* __i386__ || __amd64__ */ 777 /* is there a unit? */ 778 if (fd->type == FDT_NONE) 779 return (ENXIO); 780 781 /* select it */ 782 set_motor(fdc, fdsu, TURNON); 783 fdc_reset(fdc); /* XXX reset, then unreset, etc. */ 784 DELAY(1000000); /* 1 sec */ 785 786 if ((flags & FD_NO_PROBE) == 0) { 787 /* If we're at track 0 first seek inwards. */ 788 if ((fd_sense_drive_status(fdc, &st3) == 0) && 789 (st3 & NE7_ST3_T0)) { 790 /* Seek some steps... */ 791 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 792 /* ...wait a moment... */ 793 DELAY(300000); 794 /* make ctrlr happy: */ 795 fd_sense_int(fdc, 0, 0); 796 } 797 } 798 799 for (i = 0; i < 2; i++) { 800 /* 801 * we must recalibrate twice, just in case the 802 * heads have been beyond cylinder 76, since 803 * most FDCs still barf when attempting to 804 * recalibrate more than 77 steps 805 */ 806 /* go back to 0: */ 807 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 808 /* a second being enough for full stroke seek*/ 809 DELAY(i == 0 ? 1000000 : 300000); 810 811 /* anything responding? */ 812 if (fd_sense_int(fdc, &st0, 0) == 0 && 813 (st0 & NE7_ST0_EC) == 0) 814 break; /* already probed succesfully */ 815 } 816 } 817 } 818 819 set_motor(fdc, fdsu, TURNOFF); 820 821 if ((flags & FD_NO_PROBE) == 0 && 822 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */ 823 return (ENXIO); 824 825 done: 826 /* This doesn't work before the first reset. */ 827 if ((fdc->flags & FDC_HAS_FIFO) == 0 && 828 fdc->fdct == FDC_ENHANCED && 829 (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 && 830 enable_fifo(fdc) == 0) { 831 device_printf(device_get_parent(dev), 832 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 833 } 834 835 switch (fd->type) { 836 case FDT_12M: 837 device_set_desc(dev, "1200-KB 5.25\" drive"); 838 break; 839 case FDT_144M: 840 device_set_desc(dev, "1440-KB 3.5\" drive"); 841 break; 842 case FDT_288M: 843 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 844 break; 845 case FDT_360K: 846 device_set_desc(dev, "360-KB 5.25\" drive"); 847 break; 848 case FDT_720K: 849 device_set_desc(dev, "720-KB 3.5\" drive"); 850 break; 851 default: 852 return (ENXIO); 853 } 854 fd->track = FD_NO_TRACK; 855 fd->fdc = fdc; 856 fd->fdsu = fdsu; 857 fd->options = 0; 858 callout_handle_init(&fd->toffhandle); 859 callout_handle_init(&fd->tohandle); 860 861 /* initialize densities for subdevices */ 862 for (i = 0; i < NUMDENS; i++) 863 memcpy(fd->fts + i, fd_native_types + fd->type, 864 sizeof(struct fd_type)); 865 return (0); 866 } 867 868 static int 869 fd_attach(device_t dev) 870 { 871 struct fd_data *fd; 872 873 fd = device_get_softc(dev); 874 fd->masterdev = make_dev(&fd_cdevsw, fd->fdu, 875 UID_ROOT, GID_OPERATOR, 0640, "fd%d", fd->fdu); 876 fd->masterdev->si_drv1 = fd; 877 fd->device_stats = devstat_new_entry(device_get_name(dev), 878 device_get_unit(dev), 0, DEVSTAT_NO_ORDERED_TAGS, 879 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 880 DEVSTAT_PRIORITY_FD); 881 return (0); 882 } 883 884 static int 885 fd_detach(device_t dev) 886 { 887 struct fd_data *fd; 888 889 fd = device_get_softc(dev); 890 untimeout(fd_turnoff, fd, fd->toffhandle); 891 devstat_remove_entry(fd->device_stats); 892 destroy_dev(fd->masterdev); 893 894 return (0); 895 } 896 897 static device_method_t fd_methods[] = { 898 /* Device interface */ 899 DEVMETHOD(device_probe, fd_probe), 900 DEVMETHOD(device_attach, fd_attach), 901 DEVMETHOD(device_detach, fd_detach), 902 DEVMETHOD(device_shutdown, bus_generic_shutdown), 903 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 904 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 905 906 { 0, 0 } 907 }; 908 909 static driver_t fd_driver = { 910 "fd", 911 fd_methods, 912 sizeof(struct fd_data) 913 }; 914 915 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 916 917 /* 918 * More auxiliary functions. 919 */ 920 /* 921 * Motor control stuff. 922 * Remember to not deselect the drive we're working on. 923 */ 924 static void 925 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 926 { 927 int fdout; 928 929 fdout = fdc->fdout; 930 if (turnon) { 931 fdout &= ~FDO_FDSEL; 932 fdout |= (FDO_MOEN0 << fdsu) | FDO_FDMAEN | FDO_FRST | fdsu; 933 } else 934 fdout &= ~(FDO_MOEN0 << fdsu); 935 fdc->fdout = fdout; 936 fdout_wr(fdc, fdout); 937 TRACE1("[0x%x->FDOUT]", fdout); 938 } 939 940 static void 941 fd_turnoff(void *xfd) 942 { 943 int s; 944 fd_p fd = xfd; 945 946 TRACE1("[fd%d: turnoff]", fd->fdu); 947 948 s = splbio(); 949 /* 950 * Don't turn off the motor yet if the drive is active. 951 * 952 * If we got here, this could only mean we missed an interrupt. 953 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 954 * after a controller reset. Just schedule a pseudo-interrupt 955 * so the state machine gets re-entered. 956 */ 957 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 958 fdc_intr(fd->fdc); 959 splx(s); 960 return; 961 } 962 963 fd->flags &= ~FD_MOTOR; 964 set_motor(fd->fdc, fd->fdsu, TURNOFF); 965 splx(s); 966 } 967 968 static void 969 fd_motor_on(void *xfd) 970 { 971 int s; 972 fd_p fd = xfd; 973 974 s = splbio(); 975 fd->flags &= ~FD_MOTOR_WAIT; 976 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 977 { 978 fdc_intr(fd->fdc); 979 } 980 splx(s); 981 } 982 983 static void 984 fd_turnon(fd_p fd) 985 { 986 if(!(fd->flags & FD_MOTOR)) 987 { 988 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 989 set_motor(fd->fdc, fd->fdsu, TURNON); 990 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */ 991 } 992 } 993 994 static void 995 fdc_reset(fdc_p fdc) 996 { 997 /* Try a reset, keep motor on */ 998 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 999 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1000 DELAY(100); 1001 /* enable FDC, but defer interrupts a moment */ 1002 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1003 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1004 DELAY(100); 1005 fdout_wr(fdc, fdc->fdout); 1006 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1007 1008 /* XXX after a reset, silently believe the FDC will accept commands */ 1009 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1010 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1011 0); 1012 if (fdc->flags & FDC_HAS_FIFO) 1013 (void) enable_fifo(fdc); 1014 } 1015 1016 /* 1017 * FDC IO functions, take care of the main status register, timeout 1018 * in case the desired status bits are never set. 1019 * 1020 * These PIO loops initially start out with short delays between 1021 * each iteration in the expectation that the required condition 1022 * is usually met quickly, so it can be handled immediately. After 1023 * about 1 ms, stepping is increased to achieve a better timing 1024 * accuracy in the calls to DELAY(). 1025 */ 1026 static int 1027 fd_in(struct fdc_data *fdc, int *ptr) 1028 { 1029 int i, j, step; 1030 1031 for (j = 0, step = 1; 1032 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) && 1033 j < FDSTS_TIMEOUT; 1034 j += step) { 1035 if (i == NE7_RQM) 1036 return (fdc_err(fdc, "ready for output in input\n")); 1037 if (j == 1000) 1038 step = 1000; 1039 DELAY(step); 1040 } 1041 if (j >= FDSTS_TIMEOUT) 1042 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); 1043 #ifdef FDC_DEBUG 1044 i = fddata_rd(fdc); 1045 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1046 *ptr = i; 1047 return (0); 1048 #else /* !FDC_DEBUG */ 1049 i = fddata_rd(fdc); 1050 if (ptr) 1051 *ptr = i; 1052 return (0); 1053 #endif /* FDC_DEBUG */ 1054 } 1055 1056 static int 1057 out_fdc(struct fdc_data *fdc, int x) 1058 { 1059 int i, j, step; 1060 1061 for (j = 0, step = 1; 1062 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM && 1063 j < FDSTS_TIMEOUT; 1064 j += step) { 1065 if (i == (NE7_DIO|NE7_RQM)) 1066 return (fdc_err(fdc, "ready for input in output\n")); 1067 if (j == 1000) 1068 step = 1000; 1069 DELAY(step); 1070 } 1071 if (j >= FDSTS_TIMEOUT) 1072 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); 1073 1074 /* Send the command and return */ 1075 fddata_wr(fdc, x); 1076 TRACE1("[0x%x->FDDATA]", x); 1077 return (0); 1078 } 1079 1080 /* 1081 * Block device driver interface functions (interspersed with even more 1082 * auxiliary functions). 1083 */ 1084 static int 1085 fdopen(struct cdev *dev, int flags, int mode, struct thread *td) 1086 { 1087 fd_p fd; 1088 fdc_p fdc; 1089 int rv, unitattn, dflags; 1090 1091 fd = dev->si_drv1; 1092 if (fd == NULL) 1093 return (ENXIO); 1094 fdc = fd->fdc; 1095 if ((fdc == NULL) || (fd->type == FDT_NONE)) 1096 return (ENXIO); 1097 dflags = device_get_flags(fd->dev); 1098 /* 1099 * This is a bit bogus. It's still possible that e. g. a 1100 * descriptor gets inherited to a child, but then it's at 1101 * least for the same subdevice. By checking FD_OPEN here, we 1102 * can ensure that a device isn't attempted to be opened with 1103 * different densities at the same time where the second open 1104 * could clobber the settings from the first one. 1105 */ 1106 if (fd->flags & FD_OPEN) 1107 return (EBUSY); 1108 1109 if (flags & FNONBLOCK) { 1110 /* 1111 * Unfortunately, physio(9) discards its ioflag 1112 * argument, thus preventing us from seeing the 1113 * IO_NDELAY bit. So we need to keep track 1114 * ourselves. 1115 */ 1116 fd->flags |= FD_NONBLOCK; 1117 fd->ft = 0; 1118 } else { 1119 /* 1120 * Figure out a unit attention condition. 1121 * 1122 * If UA has been forced, proceed. 1123 * 1124 * If the drive has no changeline support, 1125 * or if the drive parameters have been lost 1126 * due to previous non-blocking access, 1127 * assume a forced UA condition. 1128 * 1129 * If motor is off, turn it on for a moment 1130 * and select our drive, in order to read the 1131 * UA hardware signal. 1132 * 1133 * If motor is on, and our drive is currently 1134 * selected, just read the hardware bit. 1135 * 1136 * If motor is on, but active for another 1137 * drive on that controller, we are lost. We 1138 * cannot risk to deselect the other drive, so 1139 * we just assume a forced UA condition to be 1140 * on the safe side. 1141 */ 1142 unitattn = 0; 1143 if ((dflags & FD_NO_CHLINE) != 0 || 1144 (fd->flags & FD_UA) != 0 || 1145 fd->ft == 0) { 1146 unitattn = 1; 1147 fd->flags &= ~FD_UA; 1148 } else if (fdc->fdout & (FDO_MOEN0 | FDO_MOEN1 | 1149 FDO_MOEN2 | FDO_MOEN3)) { 1150 if ((fdc->fdout & FDO_FDSEL) == fd->fdsu) 1151 unitattn = fdin_rd(fdc) & FDI_DCHG; 1152 else 1153 unitattn = 1; 1154 } else { 1155 set_motor(fdc, fd->fdsu, TURNON); 1156 unitattn = fdin_rd(fdc) & FDI_DCHG; 1157 set_motor(fdc, fd->fdsu, TURNOFF); 1158 } 1159 if (unitattn && (rv = fdautoselect(dev)) != 0) 1160 return (rv); 1161 } 1162 fd->flags |= FD_OPEN; 1163 1164 if ((fdc->flags & FDC_NODMA) == 0) { 1165 if (fdc->dmacnt++ == 0) { 1166 isa_dma_acquire(fdc->dmachan); 1167 isa_dmainit(fdc->dmachan, MAX_SEC_SIZE); 1168 } 1169 } 1170 1171 /* 1172 * Clearing the DMA overrun counter at open time is a bit messy. 1173 * Since we're only managing one counter per controller, opening 1174 * the second drive could mess it up. Anyway, if the DMA overrun 1175 * condition is really persistent, it will eventually time out 1176 * still. OTOH, clearing it here will ensure we'll at least start 1177 * trying again after a previous (maybe even long ago) failure. 1178 * Also, this is merely a stop-gap measure only that should not 1179 * happen during normal operation, so we can tolerate it to be a 1180 * bit sloppy about this. 1181 */ 1182 fdc->dma_overruns = 0; 1183 1184 return 0; 1185 } 1186 1187 static int 1188 fdclose(struct cdev *dev, int flags, int mode, struct thread *td) 1189 { 1190 struct fd_data *fd; 1191 fdc_p fdc; 1192 1193 fd = dev->si_drv1; 1194 fdc = fd->fdc; 1195 fd->flags &= ~(FD_OPEN | FD_NONBLOCK); 1196 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR); 1197 1198 if ((fdc->flags & FDC_NODMA) == 0) 1199 if (--fdc->dmacnt == 0) 1200 isa_dma_release(fdc->dmachan); 1201 1202 return (0); 1203 } 1204 1205 static void 1206 fdstrategy(struct bio *bp) 1207 { 1208 long blknum, nblocks; 1209 int s; 1210 fdu_t fdu; 1211 fdc_p fdc; 1212 fd_p fd; 1213 size_t fdblk; 1214 1215 fd = bp->bio_dev->si_drv1; 1216 fdu = fd->fdu; 1217 fdc = fd->fdc; 1218 bp->bio_resid = bp->bio_bcount; 1219 if (fd->type == FDT_NONE || fd->ft == 0) { 1220 if (fd->type != FDT_NONE && (fd->flags & FD_NONBLOCK)) 1221 bp->bio_error = EAGAIN; 1222 else 1223 bp->bio_error = ENXIO; 1224 bp->bio_flags |= BIO_ERROR; 1225 goto bad; 1226 } 1227 fdblk = 128 << (fd->ft->secsize); 1228 if (bp->bio_cmd != FDBIO_FORMAT && bp->bio_cmd != FDBIO_RDSECTID) { 1229 if (fd->flags & FD_NONBLOCK) { 1230 bp->bio_error = EAGAIN; 1231 bp->bio_flags |= BIO_ERROR; 1232 goto bad; 1233 } 1234 if (bp->bio_offset < 0) { 1235 printf( 1236 "fd%d: fdstrat: bad request offset = %ju, bcount = %ld\n", 1237 fdu, (intmax_t)bp->bio_offset, bp->bio_bcount); 1238 bp->bio_error = EINVAL; 1239 bp->bio_flags |= BIO_ERROR; 1240 goto bad; 1241 } 1242 if ((bp->bio_bcount % fdblk) != 0) { 1243 bp->bio_error = EINVAL; 1244 bp->bio_flags |= BIO_ERROR; 1245 goto bad; 1246 } 1247 } 1248 1249 /* 1250 * Set up block calculations. 1251 */ 1252 if (bp->bio_offset >= ((off_t)128 << fd->ft->secsize) * fd->ft->size) { 1253 bp->bio_error = EINVAL; 1254 bp->bio_flags |= BIO_ERROR; 1255 goto bad; 1256 } 1257 blknum = bp->bio_offset / fdblk; 1258 nblocks = fd->ft->size; 1259 if (blknum + bp->bio_bcount / fdblk > nblocks) { 1260 if (blknum >= nblocks) { 1261 if (bp->bio_cmd != BIO_READ) { 1262 bp->bio_error = ENOSPC; 1263 bp->bio_flags |= BIO_ERROR; 1264 } 1265 goto bad; /* not always bad, but EOF */ 1266 } 1267 bp->bio_bcount = (nblocks - blknum) * fdblk; 1268 } 1269 bp->bio_pblkno = blknum; 1270 s = splbio(); 1271 bioq_disksort(&fdc->head, bp); 1272 untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */ 1273 devstat_start_transaction_bio(fd->device_stats, bp); 1274 device_busy(fd->dev); 1275 fdstart(fdc); 1276 splx(s); 1277 return; 1278 1279 bad: 1280 biodone(bp); 1281 } 1282 1283 /* 1284 * fdstart 1285 * 1286 * We have just queued something. If the controller is not busy 1287 * then simulate the case where it has just finished a command 1288 * So that it (the interrupt routine) looks on the queue for more 1289 * work to do and picks up what we just added. 1290 * 1291 * If the controller is already busy, we need do nothing, as it 1292 * will pick up our work when the present work completes. 1293 */ 1294 static void 1295 fdstart(struct fdc_data *fdc) 1296 { 1297 int s; 1298 1299 s = splbio(); 1300 if(fdc->state == DEVIDLE) 1301 { 1302 fdc_intr(fdc); 1303 } 1304 splx(s); 1305 } 1306 1307 static void 1308 fd_iotimeout(void *xfdc) 1309 { 1310 fdc_p fdc; 1311 int s; 1312 1313 fdc = xfdc; 1314 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1315 1316 /* 1317 * Due to IBM's brain-dead design, the FDC has a faked ready 1318 * signal, hardwired to ready == true. Thus, any command 1319 * issued if there's no diskette in the drive will _never_ 1320 * complete, and must be aborted by resetting the FDC. 1321 * Many thanks, Big Blue! 1322 * The FDC must not be reset directly, since that would 1323 * interfere with the state machine. Instead, pretend that 1324 * the command completed but was invalid. The state machine 1325 * will reset the FDC and retry once. 1326 */ 1327 s = splbio(); 1328 fdc->status[0] = NE7_ST0_IC_IV; 1329 fdc->flags &= ~FDC_STAT_VALID; 1330 fdc->state = IOTIMEDOUT; 1331 fdc_intr(fdc); 1332 splx(s); 1333 } 1334 1335 /* Just ensure it has the right spl. */ 1336 static void 1337 fd_pseudointr(void *xfdc) 1338 { 1339 int s; 1340 1341 s = splbio(); 1342 fdc_intr(xfdc); 1343 splx(s); 1344 } 1345 1346 /* 1347 * fdc_intr 1348 * 1349 * Keep calling the state machine until it returns a 0. 1350 * Always called at splbio. 1351 */ 1352 static void 1353 fdc_intr(void *xfdc) 1354 { 1355 fdc_p fdc = xfdc; 1356 while(fdstate(fdc)) 1357 ; 1358 } 1359 1360 /* 1361 * Magic pseudo-DMA initialization for YE FDC. Sets count and 1362 * direction. 1363 */ 1364 #define SET_BCDR(fdc,wr,cnt,port) \ 1365 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1366 ((cnt)-1) & 0xff); \ 1367 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1368 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1369 1370 /* 1371 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy. 1372 */ 1373 static int 1374 fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count) 1375 { 1376 u_char *cptr = (u_char *)addr; 1377 1378 if (flags == BIO_READ) { 1379 if (fdc->state != PIOREAD) { 1380 fdc->state = PIOREAD; 1381 return(0); 1382 } 1383 SET_BCDR(fdc, 0, count, 0); 1384 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1385 FDC_YE_DATAPORT, cptr, count); 1386 } else { 1387 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1388 FDC_YE_DATAPORT, cptr, count); 1389 SET_BCDR(fdc, 0, count, 0); 1390 } 1391 return(1); 1392 } 1393 1394 /* 1395 * Try figuring out the density of the media present in our device. 1396 */ 1397 static int 1398 fdautoselect(struct cdev *dev) 1399 { 1400 fd_p fd; 1401 struct fd_type *fdtp; 1402 struct fdc_readid id; 1403 int i, n, oopts, rv; 1404 1405 fd = dev->si_drv1; 1406 1407 switch (fd->type) { 1408 default: 1409 return (ENXIO); 1410 1411 case FDT_360K: 1412 case FDT_720K: 1413 /* no autoselection on those drives */ 1414 fd->ft = fd_native_types + fd->type; 1415 return (0); 1416 1417 case FDT_12M: 1418 fdtp = fd_searchlist_12m; 1419 n = sizeof fd_searchlist_12m / sizeof(struct fd_type); 1420 break; 1421 1422 case FDT_144M: 1423 fdtp = fd_searchlist_144m; 1424 n = sizeof fd_searchlist_144m / sizeof(struct fd_type); 1425 break; 1426 1427 case FDT_288M: 1428 fdtp = fd_searchlist_288m; 1429 n = sizeof fd_searchlist_288m / sizeof(struct fd_type); 1430 break; 1431 } 1432 1433 /* 1434 * Try reading sector ID fields, first at cylinder 0, head 0, 1435 * then at cylinder 2, head N. We don't probe cylinder 1, 1436 * since for 5.25in DD media in a HD drive, there are no data 1437 * to read (2 step pulses per media cylinder required). For 1438 * two-sided media, the second probe always goes to head 1, so 1439 * we can tell them apart from single-sided media. As a 1440 * side-effect this means that single-sided media should be 1441 * mentioned in the search list after two-sided media of an 1442 * otherwise identical density. Media with a different number 1443 * of sectors per track but otherwise identical parameters 1444 * cannot be distinguished at all. 1445 * 1446 * If we successfully read an ID field on both cylinders where 1447 * the recorded values match our expectation, we are done. 1448 * Otherwise, we try the next density entry from the table. 1449 * 1450 * Stepping to cylinder 2 has the side-effect of clearing the 1451 * unit attention bit. 1452 */ 1453 oopts = fd->options; 1454 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY; 1455 for (i = 0; i < n; i++, fdtp++) { 1456 fd->ft = fdtp; 1457 1458 id.cyl = id.head = 0; 1459 rv = fdmisccmd(dev, FDBIO_RDSECTID, &id); 1460 if (rv != 0) 1461 continue; 1462 if (id.cyl != 0 || id.head != 0 || 1463 id.secshift != fdtp->secsize) 1464 continue; 1465 id.cyl = 2; 1466 id.head = fd->ft->heads - 1; 1467 rv = fdmisccmd(dev, FDBIO_RDSECTID, &id); 1468 if (id.cyl != 2 || id.head != fdtp->heads - 1 || 1469 id.secshift != fdtp->secsize) 1470 continue; 1471 if (rv == 0) 1472 break; 1473 } 1474 1475 fd->options = oopts; 1476 if (i == n) { 1477 if (bootverbose) 1478 device_printf(fd->dev, "autoselection failed\n"); 1479 fd->ft = 0; 1480 return (EIO); 1481 } else { 1482 if (bootverbose) 1483 device_printf(fd->dev, "autoselected %d KB medium\n", 1484 fd->ft->size / 2); 1485 return (0); 1486 } 1487 } 1488 1489 1490 /* 1491 * The controller state machine. 1492 * 1493 * If it returns a non zero value, it should be called again immediately. 1494 */ 1495 static int 1496 fdstate(fdc_p fdc) 1497 { 1498 struct fdc_readid *idp; 1499 int read, format, rdsectid, cylinder, head, i, sec = 0, sectrac; 1500 int st0, cyl, st3, idf, ne7cmd, mfm, steptrac; 1501 unsigned long blknum; 1502 fdu_t fdu = fdc->fdu; 1503 fd_p fd; 1504 register struct bio *bp; 1505 struct fd_formb *finfo = NULL; 1506 size_t fdblk; 1507 1508 bp = fdc->bp; 1509 if (bp == NULL) { 1510 bp = bioq_first(&fdc->head); 1511 if (bp != NULL) { 1512 bioq_remove(&fdc->head, bp); 1513 fdc->bp = bp; 1514 } 1515 } 1516 if (bp == NULL) { 1517 /* 1518 * Nothing left for this controller to do, 1519 * force into the IDLE state. 1520 */ 1521 fdc->state = DEVIDLE; 1522 if (fdc->fd) { 1523 device_printf(fdc->fdc_dev, 1524 "unexpected valid fd pointer\n"); 1525 fdc->fd = (fd_p) 0; 1526 fdc->fdu = -1; 1527 } 1528 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1529 return (0); 1530 } 1531 fd = bp->bio_dev->si_drv1; 1532 fdu = fd->fdu; 1533 fdblk = 128 << fd->ft->secsize; 1534 if (fdc->fd && (fd != fdc->fd)) 1535 device_printf(fd->dev, "confused fd pointers\n"); 1536 read = bp->bio_cmd == BIO_READ; 1537 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0; 1538 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1; 1539 if (read) 1540 idf = ISADMA_READ; 1541 else 1542 idf = ISADMA_WRITE; 1543 format = bp->bio_cmd == FDBIO_FORMAT; 1544 rdsectid = bp->bio_cmd == FDBIO_RDSECTID; 1545 if (format) 1546 finfo = (struct fd_formb *)bp->bio_data; 1547 TRACE1("fd%d", fdu); 1548 TRACE1("[%s]", fdstates[fdc->state]); 1549 TRACE1("(0x%x)", fd->flags); 1550 untimeout(fd_turnoff, fd, fd->toffhandle); 1551 fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz); 1552 switch (fdc->state) 1553 { 1554 case DEVIDLE: 1555 case FINDWORK: /* we have found new work */ 1556 fdc->retry = 0; 1557 fd->skip = 0; 1558 fdc->fd = fd; 1559 fdc->fdu = fdu; 1560 fdc->fdctl_wr(fdc, fd->ft->trans); 1561 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 1562 /* 1563 * If the next drive has a motor startup pending, then 1564 * it will start up in its own good time. 1565 */ 1566 if(fd->flags & FD_MOTOR_WAIT) { 1567 fdc->state = MOTORWAIT; 1568 return (0); /* will return later */ 1569 } 1570 /* 1571 * Maybe if it's not starting, it SHOULD be starting. 1572 */ 1573 if (!(fd->flags & FD_MOTOR)) 1574 { 1575 fdc->state = MOTORWAIT; 1576 fd_turnon(fd); 1577 return (0); /* will return later */ 1578 } 1579 else /* at least make sure we are selected */ 1580 { 1581 set_motor(fdc, fd->fdsu, TURNON); 1582 } 1583 if (fdc->flags & FDC_NEEDS_RESET) { 1584 fdc->state = RESETCTLR; 1585 fdc->flags &= ~FDC_NEEDS_RESET; 1586 } else 1587 fdc->state = DOSEEK; 1588 return (1); /* will return immediately */ 1589 1590 case DOSEEK: 1591 blknum = bp->bio_pblkno + fd->skip / fdblk; 1592 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 1593 if (cylinder == fd->track) 1594 { 1595 fdc->state = SEEKCOMPLETE; 1596 return (1); /* will return immediately */ 1597 } 1598 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 1599 fd->fdsu, cylinder * steptrac, 0)) 1600 { 1601 /* 1602 * Seek command not accepted, looks like 1603 * the FDC went off to the Saints... 1604 */ 1605 fdc->retry = 6; /* try a reset */ 1606 return(retrier(fdc)); 1607 } 1608 fd->track = FD_NO_TRACK; 1609 fdc->state = SEEKWAIT; 1610 return(0); /* will return later */ 1611 1612 case SEEKWAIT: 1613 /* allow heads to settle */ 1614 timeout(fd_pseudointr, fdc, hz / 16); 1615 fdc->state = SEEKCOMPLETE; 1616 return(0); /* will return later */ 1617 1618 case SEEKCOMPLETE : /* seek done, start DMA */ 1619 blknum = bp->bio_pblkno + fd->skip / fdblk; 1620 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 1621 1622 /* Make sure seek really happened. */ 1623 if(fd->track == FD_NO_TRACK) { 1624 int descyl = cylinder * steptrac; 1625 do { 1626 /* 1627 * This might be a "ready changed" interrupt, 1628 * which cannot really happen since the 1629 * RDY pin is hardwired to + 5 volts. This 1630 * generally indicates a "bouncing" intr 1631 * line, so do one of the following: 1632 * 1633 * When running on an enhanced FDC that is 1634 * known to not go stuck after responding 1635 * with INVALID, fetch all interrupt states 1636 * until seeing either an INVALID or a 1637 * real interrupt condition. 1638 * 1639 * When running on a dumb old NE765, give 1640 * up immediately. The controller will 1641 * provide up to four dummy RC interrupt 1642 * conditions right after reset (for the 1643 * corresponding four drives), so this is 1644 * our only chance to get notice that it 1645 * was not the FDC that caused the interrupt. 1646 */ 1647 if (fd_sense_int(fdc, &st0, &cyl) 1648 == FD_NOT_VALID) 1649 return (0); /* will return later */ 1650 if(fdc->fdct == FDC_NE765 1651 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1652 return (0); /* hope for a real intr */ 1653 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1654 1655 if (0 == descyl) { 1656 int failed = 0; 1657 /* 1658 * seek to cyl 0 requested; make sure we are 1659 * really there 1660 */ 1661 if (fd_sense_drive_status(fdc, &st3)) 1662 failed = 1; 1663 if ((st3 & NE7_ST3_T0) == 0) { 1664 printf( 1665 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 1666 fdu, st3, NE7_ST3BITS); 1667 failed = 1; 1668 } 1669 1670 if (failed) { 1671 if(fdc->retry < 3) 1672 fdc->retry = 3; 1673 return (retrier(fdc)); 1674 } 1675 } 1676 1677 if (cyl != descyl) { 1678 printf( 1679 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 1680 fdu, descyl, cyl, st0); 1681 if (fdc->retry < 3) 1682 fdc->retry = 3; 1683 return (retrier(fdc)); 1684 } 1685 } 1686 1687 fd->track = cylinder; 1688 if (format) 1689 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 1690 - (char *)finfo; 1691 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 1692 isa_dmastart(idf, bp->bio_data+fd->skip, 1693 format ? bp->bio_bcount : fdblk, fdc->dmachan); 1694 blknum = bp->bio_pblkno + fd->skip / fdblk; 1695 sectrac = fd->ft->sectrac; 1696 sec = blknum % (sectrac * fd->ft->heads); 1697 head = sec / sectrac; 1698 sec = sec % sectrac + 1; 1699 if (head != 0 && fd->ft->offset_side2 != 0) 1700 sec += fd->ft->offset_side2; 1701 fd->hddrv = ((head&1)<<2)+fdu; 1702 1703 if(format || !(read || rdsectid)) 1704 { 1705 /* make sure the drive is writable */ 1706 if(fd_sense_drive_status(fdc, &st3) != 0) 1707 { 1708 /* stuck controller? */ 1709 if (!(fdc->flags & FDC_NODMA)) 1710 isa_dmadone(idf, 1711 bp->bio_data + fd->skip, 1712 format ? bp->bio_bcount : fdblk, 1713 fdc->dmachan); 1714 fdc->retry = 6; /* reset the beast */ 1715 return (retrier(fdc)); 1716 } 1717 if(st3 & NE7_ST3_WP) 1718 { 1719 /* 1720 * XXX YES! this is ugly. 1721 * in order to force the current operation 1722 * to fail, we will have to fake an FDC 1723 * error - all error handling is done 1724 * by the retrier() 1725 */ 1726 fdc->status[0] = NE7_ST0_IC_AT; 1727 fdc->status[1] = NE7_ST1_NW; 1728 fdc->status[2] = 0; 1729 fdc->status[3] = fd->track; 1730 fdc->status[4] = head; 1731 fdc->status[5] = sec; 1732 fdc->retry = 8; /* break out immediately */ 1733 fdc->state = IOTIMEDOUT; /* not really... */ 1734 return (1); /* will return immediately */ 1735 } 1736 } 1737 1738 if (format) { 1739 ne7cmd = NE7CMD_FORMAT | mfm; 1740 if (fdc->flags & FDC_NODMA) { 1741 /* 1742 * This seems to be necessary for 1743 * whatever obscure reason; if we omit 1744 * it, we end up filling the sector ID 1745 * fields of the newly formatted track 1746 * entirely with garbage, causing 1747 * `wrong cylinder' errors all over 1748 * the place when trying to read them 1749 * back. 1750 * 1751 * Umpf. 1752 */ 1753 SET_BCDR(fdc, 1, bp->bio_bcount, 0); 1754 1755 (void)fdcpio(fdc,bp->bio_cmd, 1756 bp->bio_data+fd->skip, 1757 bp->bio_bcount); 1758 1759 } 1760 /* formatting */ 1761 if(fd_cmd(fdc, 6, ne7cmd, head << 2 | fdu, 1762 finfo->fd_formb_secshift, 1763 finfo->fd_formb_nsecs, 1764 finfo->fd_formb_gaplen, 1765 finfo->fd_formb_fillbyte, 0)) { 1766 /* controller fell over */ 1767 if (!(fdc->flags & FDC_NODMA)) 1768 isa_dmadone(idf, 1769 bp->bio_data + fd->skip, 1770 format ? bp->bio_bcount : fdblk, 1771 fdc->dmachan); 1772 fdc->retry = 6; 1773 return (retrier(fdc)); 1774 } 1775 } else if (rdsectid) { 1776 ne7cmd = NE7CMD_READID | mfm; 1777 if (fd_cmd(fdc, 2, ne7cmd, head << 2 | fdu, 0)) { 1778 /* controller jamming */ 1779 fdc->retry = 6; 1780 return (retrier(fdc)); 1781 } 1782 } else { 1783 /* read or write operation */ 1784 ne7cmd = (read ? NE7CMD_READ | NE7CMD_SK : NE7CMD_WRITE) | mfm; 1785 if (fdc->flags & FDC_NODMA) { 1786 /* 1787 * This seems to be necessary even when 1788 * reading data. 1789 */ 1790 SET_BCDR(fdc, 1, fdblk, 0); 1791 1792 /* 1793 * Perform the write pseudo-DMA before 1794 * the WRITE command is sent. 1795 */ 1796 if (!read) 1797 (void)fdcpio(fdc,bp->bio_cmd, 1798 bp->bio_data+fd->skip, 1799 fdblk); 1800 } 1801 if (fd_cmd(fdc, 9, 1802 ne7cmd, 1803 head << 2 | fdu, /* head & unit */ 1804 fd->track, /* track */ 1805 head, 1806 sec, /* sector + 1 */ 1807 fd->ft->secsize, /* sector size */ 1808 sectrac, /* sectors/track */ 1809 fd->ft->gap, /* gap size */ 1810 fd->ft->datalen, /* data length */ 1811 0)) { 1812 /* the beast is sleeping again */ 1813 if (!(fdc->flags & FDC_NODMA)) 1814 isa_dmadone(idf, 1815 bp->bio_data + fd->skip, 1816 format ? bp->bio_bcount : fdblk, 1817 fdc->dmachan); 1818 fdc->retry = 6; 1819 return (retrier(fdc)); 1820 } 1821 } 1822 if (!rdsectid && (fdc->flags & FDC_NODMA)) 1823 /* 1824 * If this is a read, then simply await interrupt 1825 * before performing PIO. 1826 */ 1827 if (read && !fdcpio(fdc,bp->bio_cmd, 1828 bp->bio_data+fd->skip,fdblk)) { 1829 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 1830 return(0); /* will return later */ 1831 } 1832 1833 /* 1834 * Write (or format) operation will fall through and 1835 * await completion interrupt. 1836 */ 1837 fdc->state = IOCOMPLETE; 1838 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 1839 return (0); /* will return later */ 1840 1841 case PIOREAD: 1842 /* 1843 * Actually perform the PIO read. The IOCOMPLETE case 1844 * removes the timeout for us. 1845 */ 1846 (void)fdcpio(fdc,bp->bio_cmd,bp->bio_data+fd->skip,fdblk); 1847 fdc->state = IOCOMPLETE; 1848 /* FALLTHROUGH */ 1849 case IOCOMPLETE: /* IO done, post-analyze */ 1850 untimeout(fd_iotimeout, fdc, fd->tohandle); 1851 1852 if (fd_read_status(fdc)) { 1853 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 1854 isa_dmadone(idf, bp->bio_data + fd->skip, 1855 format ? bp->bio_bcount : fdblk, 1856 fdc->dmachan); 1857 if (fdc->retry < 6) 1858 fdc->retry = 6; /* force a reset */ 1859 return (retrier(fdc)); 1860 } 1861 1862 fdc->state = IOTIMEDOUT; 1863 1864 /* FALLTHROUGH */ 1865 case IOTIMEDOUT: 1866 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 1867 isa_dmadone(idf, bp->bio_data + fd->skip, 1868 format ? bp->bio_bcount : fdblk, fdc->dmachan); 1869 if (fdc->status[0] & NE7_ST0_IC) { 1870 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1871 && fdc->status[1] & NE7_ST1_OR) { 1872 /* 1873 * DMA overrun. Someone hogged the bus and 1874 * didn't release it in time for the next 1875 * FDC transfer. 1876 * 1877 * We normally restart this without bumping 1878 * the retry counter. However, in case 1879 * something is seriously messed up (like 1880 * broken hardware), we rather limit the 1881 * number of retries so the IO operation 1882 * doesn't block indefinately. 1883 */ 1884 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 1885 fdc->state = SEEKCOMPLETE; 1886 return (1);/* will return immediately */ 1887 } /* else fall through */ 1888 } 1889 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 1890 && fdc->retry < 6) 1891 fdc->retry = 6; /* force a reset */ 1892 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1893 && fdc->status[2] & NE7_ST2_WC 1894 && fdc->retry < 3) 1895 fdc->retry = 3; /* force recalibrate */ 1896 return (retrier(fdc)); 1897 } 1898 /* All OK */ 1899 if (rdsectid) { 1900 /* copy out ID field contents */ 1901 idp = (struct fdc_readid *)bp->bio_data; 1902 idp->cyl = fdc->status[3]; 1903 idp->head = fdc->status[4]; 1904 idp->sec = fdc->status[5]; 1905 idp->secshift = fdc->status[6]; 1906 } 1907 /* Operation successful, retry DMA overruns again next time. */ 1908 fdc->dma_overruns = 0; 1909 fd->skip += fdblk; 1910 if (!rdsectid && !format && fd->skip < bp->bio_bcount) { 1911 /* set up next transfer */ 1912 fdc->state = DOSEEK; 1913 } else { 1914 /* ALL DONE */ 1915 fd->skip = 0; 1916 bp->bio_resid = 0; 1917 fdc->bp = NULL; 1918 device_unbusy(fd->dev); 1919 biofinish(bp, fd->device_stats, 0); 1920 fdc->fd = (fd_p) 0; 1921 fdc->fdu = -1; 1922 fdc->state = FINDWORK; 1923 } 1924 return (1); /* will return immediately */ 1925 1926 case RESETCTLR: 1927 fdc_reset(fdc); 1928 fdc->retry++; 1929 fdc->state = RESETCOMPLETE; 1930 return (0); /* will return later */ 1931 1932 case RESETCOMPLETE: 1933 /* 1934 * Discard all the results from the reset so that they 1935 * can't cause an unexpected interrupt later. 1936 */ 1937 for (i = 0; i < 4; i++) 1938 (void)fd_sense_int(fdc, &st0, &cyl); 1939 fdc->state = STARTRECAL; 1940 /* FALLTHROUGH */ 1941 case STARTRECAL: 1942 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 1943 /* arrgl */ 1944 fdc->retry = 6; 1945 return (retrier(fdc)); 1946 } 1947 fdc->state = RECALWAIT; 1948 return (0); /* will return later */ 1949 1950 case RECALWAIT: 1951 /* allow heads to settle */ 1952 timeout(fd_pseudointr, fdc, hz / 8); 1953 fdc->state = RECALCOMPLETE; 1954 return (0); /* will return later */ 1955 1956 case RECALCOMPLETE: 1957 do { 1958 /* 1959 * See SEEKCOMPLETE for a comment on this: 1960 */ 1961 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 1962 return (0); /* will return later */ 1963 if(fdc->fdct == FDC_NE765 1964 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1965 return (0); /* hope for a real intr */ 1966 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1967 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 1968 { 1969 if(fdc->retry > 3) 1970 /* 1971 * A recalibrate from beyond cylinder 77 1972 * will "fail" due to the FDC limitations; 1973 * since people used to complain much about 1974 * the failure message, try not logging 1975 * this one if it seems to be the first 1976 * time in a line. 1977 */ 1978 printf("fd%d: recal failed ST0 %b cyl %d\n", 1979 fdu, st0, NE7_ST0BITS, cyl); 1980 if(fdc->retry < 3) fdc->retry = 3; 1981 return (retrier(fdc)); 1982 } 1983 fd->track = 0; 1984 /* Seek (probably) necessary */ 1985 fdc->state = DOSEEK; 1986 return (1); /* will return immediately */ 1987 1988 case MOTORWAIT: 1989 if(fd->flags & FD_MOTOR_WAIT) 1990 { 1991 return (0); /* time's not up yet */ 1992 } 1993 if (fdc->flags & FDC_NEEDS_RESET) { 1994 fdc->state = RESETCTLR; 1995 fdc->flags &= ~FDC_NEEDS_RESET; 1996 } else 1997 fdc->state = DOSEEK; 1998 return (1); /* will return immediately */ 1999 2000 default: 2001 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2002 if (fd_read_status(fdc) == 0) 2003 printf("FDC status :%x %x %x %x %x %x %x ", 2004 fdc->status[0], 2005 fdc->status[1], 2006 fdc->status[2], 2007 fdc->status[3], 2008 fdc->status[4], 2009 fdc->status[5], 2010 fdc->status[6] ); 2011 else 2012 printf("No status available "); 2013 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2014 { 2015 printf("[controller is dead now]\n"); 2016 return (0); /* will return later */ 2017 } 2018 printf("ST0 = %x, PCN = %x\n", st0, cyl); 2019 return (0); /* will return later */ 2020 } 2021 /* noone should ever get here */ 2022 } 2023 2024 static int 2025 retrier(struct fdc_data *fdc) 2026 { 2027 struct bio *bp; 2028 struct fd_data *fd; 2029 int fdu; 2030 2031 bp = fdc->bp; 2032 2033 /* XXX shouldn't this be cached somewhere? */ 2034 fd = bp->bio_dev->si_drv1; 2035 fdu = fd->fdu; 2036 if (fd->options & FDOPT_NORETRY) 2037 goto fail; 2038 2039 switch (fdc->retry) { 2040 case 0: case 1: case 2: 2041 fdc->state = SEEKCOMPLETE; 2042 break; 2043 case 3: case 4: case 5: 2044 fdc->state = STARTRECAL; 2045 break; 2046 case 6: 2047 fdc->state = RESETCTLR; 2048 break; 2049 case 7: 2050 break; 2051 default: 2052 fail: 2053 if ((fd->options & FDOPT_NOERRLOG) == 0) { 2054 disk_err(bp, "hard error", 2055 fdc->fd->skip / DEV_BSIZE, 0); 2056 if (fdc->flags & FDC_STAT_VALID) { 2057 printf( 2058 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2059 fdc->status[0], NE7_ST0BITS, 2060 fdc->status[1], NE7_ST1BITS, 2061 fdc->status[2], NE7_ST2BITS, 2062 fdc->status[3], fdc->status[4], 2063 fdc->status[5]); 2064 } 2065 else 2066 printf(" (No status)\n"); 2067 } 2068 if ((fd->options & FDOPT_NOERROR) == 0) { 2069 bp->bio_flags |= BIO_ERROR; 2070 bp->bio_error = EIO; 2071 bp->bio_resid = bp->bio_bcount - fdc->fd->skip; 2072 } else 2073 bp->bio_resid = 0; 2074 fdc->bp = NULL; 2075 fdc->fd->skip = 0; 2076 device_unbusy(fd->dev); 2077 biofinish(bp, fdc->fd->device_stats, 0); 2078 fdc->state = FINDWORK; 2079 fdc->flags |= FDC_NEEDS_RESET; 2080 fdc->fd = (fd_p) 0; 2081 fdc->fdu = -1; 2082 return (1); 2083 } 2084 fdc->retry++; 2085 return (1); 2086 } 2087 2088 static void 2089 fdbiodone(struct bio *bp) 2090 { 2091 wakeup(bp); 2092 } 2093 2094 static int 2095 fdmisccmd(struct cdev *dev, u_int cmd, void *data) 2096 { 2097 fdu_t fdu; 2098 fd_p fd; 2099 struct bio *bp; 2100 struct fd_formb *finfo; 2101 struct fdc_readid *idfield; 2102 size_t fdblk; 2103 int error; 2104 2105 fd = dev->si_drv1; 2106 fdu = fd->fdu; 2107 fdblk = 128 << fd->ft->secsize; 2108 finfo = (struct fd_formb *)data; 2109 idfield = (struct fdc_readid *)data; 2110 2111 bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO); 2112 2113 /* 2114 * Set up a bio request for fdstrategy(). bio_offset is faked 2115 * so that fdstrategy() will seek to the the requested 2116 * cylinder, and use the desired head. 2117 */ 2118 bp->bio_cmd = cmd; 2119 if (cmd == FDBIO_FORMAT) { 2120 bp->bio_offset = 2121 (finfo->cyl * (fd->ft->sectrac * fd->ft->heads) + 2122 finfo->head * fd->ft->sectrac) * fdblk; 2123 bp->bio_bcount = sizeof(struct fd_idfield_data) * 2124 finfo->fd_formb_nsecs; 2125 } else if (cmd == FDBIO_RDSECTID) { 2126 bp->bio_offset = 2127 (idfield->cyl * (fd->ft->sectrac * fd->ft->heads) + 2128 idfield->head * fd->ft->sectrac) * fdblk; 2129 bp->bio_bcount = sizeof(struct fdc_readid); 2130 } else 2131 panic("wrong cmd in fdmisccmd()"); 2132 bp->bio_data = data; 2133 bp->bio_dev = dev; 2134 bp->bio_done = fdbiodone; 2135 bp->bio_flags = 0; 2136 2137 /* Now run the command. */ 2138 fdstrategy(bp); 2139 error = biowait(bp, "fdcmd"); 2140 2141 free(bp, M_TEMP); 2142 return (error); 2143 } 2144 2145 static int 2146 fdioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 2147 { 2148 fdu_t fdu; 2149 fd_p fd; 2150 struct fdc_status *fsp; 2151 struct fdc_readid *rid; 2152 int error; 2153 2154 fd = dev->si_drv1; 2155 fdu = fd->fdu; 2156 2157 /* 2158 * First, handle everything that could be done with 2159 * FD_NONBLOCK still being set. 2160 */ 2161 switch (cmd) { 2162 2163 case DIOCGMEDIASIZE: 2164 if (fd->ft == 0) 2165 return ((fd->flags & FD_NONBLOCK) ? EAGAIN : ENXIO); 2166 *(off_t *)addr = (128 << (fd->ft->secsize)) * fd->ft->size; 2167 return (0); 2168 2169 case DIOCGSECTORSIZE: 2170 if (fd->ft == 0) 2171 return ((fd->flags & FD_NONBLOCK) ? EAGAIN : ENXIO); 2172 *(u_int *)addr = 128 << (fd->ft->secsize); 2173 return (0); 2174 2175 case FIONBIO: 2176 if (*(int *)addr != 0) 2177 fd->flags |= FD_NONBLOCK; 2178 else { 2179 if (fd->ft == 0) { 2180 /* 2181 * No drive type has been selected yet, 2182 * cannot turn FNONBLOCK off. 2183 */ 2184 return (EINVAL); 2185 } 2186 fd->flags &= ~FD_NONBLOCK; 2187 } 2188 return (0); 2189 2190 case FIOASYNC: 2191 /* keep the generic fcntl() code happy */ 2192 return (0); 2193 2194 case FD_GTYPE: /* get drive type */ 2195 if (fd->ft == 0) 2196 /* no type known yet, return the native type */ 2197 *(struct fd_type *)addr = fd_native_types[fd->type]; 2198 else 2199 *(struct fd_type *)addr = *fd->ft; 2200 return (0); 2201 2202 case FD_STYPE: /* set drive type */ 2203 /* 2204 * Allow setting drive type temporarily iff 2205 * currently unset. Used for fdformat so any 2206 * user can set it, and then start formatting. 2207 */ 2208 if (fd->ft) 2209 return (EINVAL); /* already set */ 2210 fd->fts[0] = *(struct fd_type *)addr; 2211 fd->ft = &fd->fts[0]; 2212 fd->flags |= FD_UA; 2213 return (0); 2214 2215 case FD_GOPTS: /* get drive options */ 2216 *(int *)addr = fd->options + FDOPT_AUTOSEL; 2217 return (0); 2218 2219 case FD_SOPTS: /* set drive options */ 2220 fd->options = *(int *)addr & ~FDOPT_AUTOSEL; 2221 return (0); 2222 2223 #ifdef FDC_DEBUG 2224 case FD_DEBUG: 2225 if ((fd_debug != 0) != (*(int *)addr != 0)) { 2226 fd_debug = (*(int *)addr != 0); 2227 printf("fd%d: debugging turned %s\n", 2228 fd->fdu, fd_debug ? "on" : "off"); 2229 } 2230 return (0); 2231 #endif 2232 2233 case FD_CLRERR: 2234 if (suser(td) != 0) 2235 return (EPERM); 2236 fd->fdc->fdc_errs = 0; 2237 return (0); 2238 2239 case FD_GSTAT: 2240 fsp = (struct fdc_status *)addr; 2241 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2242 return (EINVAL); 2243 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2244 return (0); 2245 2246 case FD_GDTYPE: 2247 *(enum fd_drivetype *)addr = fd->type; 2248 return (0); 2249 } 2250 2251 /* 2252 * Now handle everything else. Make sure we have a valid 2253 * drive type. 2254 */ 2255 if (fd->flags & FD_NONBLOCK) 2256 return (EAGAIN); 2257 if (fd->ft == 0) 2258 return (ENXIO); 2259 error = 0; 2260 2261 switch (cmd) { 2262 2263 case FD_FORM: 2264 if ((flag & FWRITE) == 0) 2265 return (EBADF); /* must be opened for writing */ 2266 if (((struct fd_formb *)addr)->format_version != 2267 FD_FORMAT_VERSION) 2268 return (EINVAL); /* wrong version of formatting prog */ 2269 error = fdmisccmd(dev, FDBIO_FORMAT, addr); 2270 break; 2271 2272 case FD_GTYPE: /* get drive type */ 2273 *(struct fd_type *)addr = *fd->ft; 2274 break; 2275 2276 case FD_STYPE: /* set drive type */ 2277 /* this is considered harmful; only allow for superuser */ 2278 if (suser(td) != 0) 2279 return (EPERM); 2280 *fd->ft = *(struct fd_type *)addr; 2281 break; 2282 2283 case FD_GOPTS: /* get drive options */ 2284 *(int *)addr = fd->options; 2285 break; 2286 2287 case FD_SOPTS: /* set drive options */ 2288 fd->options = *(int *)addr; 2289 break; 2290 2291 #ifdef FDC_DEBUG 2292 case FD_DEBUG: 2293 if ((fd_debug != 0) != (*(int *)addr != 0)) { 2294 fd_debug = (*(int *)addr != 0); 2295 printf("fd%d: debugging turned %s\n", 2296 fd->fdu, fd_debug ? "on" : "off"); 2297 } 2298 break; 2299 #endif 2300 2301 case FD_CLRERR: 2302 if (suser(td) != 0) 2303 return (EPERM); 2304 fd->fdc->fdc_errs = 0; 2305 break; 2306 2307 case FD_GSTAT: 2308 fsp = (struct fdc_status *)addr; 2309 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2310 return (EINVAL); 2311 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2312 break; 2313 2314 case FD_READID: 2315 rid = (struct fdc_readid *)addr; 2316 if (rid->cyl > MAX_CYLINDER || rid->head > MAX_HEAD) 2317 return (EINVAL); 2318 error = fdmisccmd(dev, FDBIO_RDSECTID, addr); 2319 break; 2320 2321 default: 2322 error = ENOTTY; 2323 break; 2324 } 2325 return (error); 2326 } 2327