1 /* 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Don Ahn. 7 * 8 * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu) 9 * aided by the Linux floppy driver modifications from David Bateman 10 * (dbateman@eng.uts.edu.au). 11 * 12 * Copyright (c) 1993, 1994 by 13 * jc@irbs.UUCP (John Capo) 14 * vak@zebub.msk.su (Serge Vakulenko) 15 * ache@astral.msk.su (Andrew A. Chernov) 16 * 17 * Copyright (c) 1993, 1994, 1995 by 18 * joerg_wunsch@uriah.sax.de (Joerg Wunsch) 19 * dufault@hda.com (Peter Dufault) 20 * 21 * Copyright (c) 2001 Joerg Wunsch, 22 * joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) 23 * 24 * Redistribution and use in source and binary forms, with or without 25 * modification, are permitted provided that the following conditions 26 * are met: 27 * 1. Redistributions of source code must retain the above copyright 28 * notice, this list of conditions and the following disclaimer. 29 * 2. Redistributions in binary form must reproduce the above copyright 30 * notice, this list of conditions and the following disclaimer in the 31 * documentation and/or other materials provided with the distribution. 32 * 3. All advertising materials mentioning features or use of this software 33 * must display the following acknowledgement: 34 * This product includes software developed by the University of 35 * California, Berkeley and its contributors. 36 * 4. Neither the name of the University nor the names of its contributors 37 * may be used to endorse or promote products derived from this software 38 * without specific prior written permission. 39 * 40 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * from: @(#)fd.c 7.4 (Berkeley) 5/25/91 53 * $FreeBSD$ 54 */ 55 56 #include "opt_fdc.h" 57 #include "card.h" 58 59 #include <sys/param.h> 60 #include <sys/systm.h> 61 #include <sys/bio.h> 62 #include <sys/bus.h> 63 #include <sys/conf.h> 64 #include <sys/devicestat.h> 65 #include <sys/disklabel.h> 66 #include <sys/fcntl.h> 67 #include <sys/fdcio.h> 68 #include <sys/filio.h> 69 #include <sys/kernel.h> 70 #include <sys/lock.h> 71 #include <sys/malloc.h> 72 #include <sys/module.h> 73 #include <sys/mutex.h> 74 #include <sys/proc.h> 75 #include <sys/syslog.h> 76 77 #include <machine/bus.h> 78 #include <sys/rman.h> 79 80 #include <machine/clock.h> 81 #include <machine/resource.h> 82 #include <machine/stdarg.h> 83 84 #include <isa/isavar.h> 85 #include <isa/isareg.h> 86 #include <isa/fdreg.h> 87 #include <isa/rtc.h> 88 89 enum fdc_type 90 { 91 FDC_NE765, FDC_ENHANCED, FDC_UNKNOWN = -1 92 }; 93 94 enum fdc_states { 95 DEVIDLE, 96 FINDWORK, 97 DOSEEK, 98 SEEKCOMPLETE , 99 IOCOMPLETE, 100 RECALCOMPLETE, 101 STARTRECAL, 102 RESETCTLR, 103 SEEKWAIT, 104 RECALWAIT, 105 MOTORWAIT, 106 IOTIMEDOUT, 107 RESETCOMPLETE, 108 PIOREAD 109 }; 110 111 #ifdef FDC_DEBUG 112 static char const * const fdstates[] = { 113 "DEVIDLE", 114 "FINDWORK", 115 "DOSEEK", 116 "SEEKCOMPLETE", 117 "IOCOMPLETE", 118 "RECALCOMPLETE", 119 "STARTRECAL", 120 "RESETCTLR", 121 "SEEKWAIT", 122 "RECALWAIT", 123 "MOTORWAIT", 124 "IOTIMEDOUT", 125 "RESETCOMPLETE", 126 "PIOREAD" 127 }; 128 #endif 129 130 /* 131 * Per controller structure (softc). 132 */ 133 struct fdc_data 134 { 135 int fdcu; /* our unit number */ 136 int dmachan; 137 int flags; 138 #define FDC_ATTACHED 0x01 139 #define FDC_STAT_VALID 0x08 140 #define FDC_HAS_FIFO 0x10 141 #define FDC_NEEDS_RESET 0x20 142 #define FDC_NODMA 0x40 143 #define FDC_ISPNP 0x80 144 #define FDC_ISPCMCIA 0x100 145 struct fd_data *fd; 146 int fdu; /* the active drive */ 147 enum fdc_states state; 148 int retry; 149 int fdout; /* mirror of the w/o digital output reg */ 150 u_int status[7]; /* copy of the registers */ 151 enum fdc_type fdct; /* chip version of FDC */ 152 int fdc_errs; /* number of logged errors */ 153 int dma_overruns; /* number of DMA overruns */ 154 struct bio_queue_head head; 155 struct bio *bp; /* active buffer */ 156 struct resource *res_ioport, *res_ctl, *res_irq, *res_drq; 157 int rid_ioport, rid_ctl, rid_irq, rid_drq; 158 int port_off; 159 bus_space_tag_t portt; 160 bus_space_handle_t porth; 161 bus_space_tag_t ctlt; 162 bus_space_handle_t ctlh; 163 void *fdc_intr; 164 struct device *fdc_dev; 165 void (*fdctl_wr)(struct fdc_data *fdc, u_int8_t v); 166 }; 167 168 typedef int fdu_t; 169 typedef int fdcu_t; 170 typedef int fdsu_t; 171 typedef struct fd_data *fd_p; 172 typedef struct fdc_data *fdc_p; 173 typedef enum fdc_type fdc_t; 174 175 #define FDUNIT(s) (((s) >> 6) & 3) 176 #define FDNUMTOUNIT(n) (((n) & 3) << 6) 177 #define FDTYPE(s) ((s) & 0x3f) 178 179 /* 180 * fdc maintains a set (1!) of ivars per child of each controller. 181 */ 182 enum fdc_device_ivars { 183 FDC_IVAR_FDUNIT, 184 }; 185 186 /* 187 * Simple access macros for the ivars. 188 */ 189 #define FDC_ACCESSOR(A, B, T) \ 190 static __inline T fdc_get_ ## A(device_t dev) \ 191 { \ 192 uintptr_t v; \ 193 BUS_READ_IVAR(device_get_parent(dev), dev, FDC_IVAR_ ## B, &v); \ 194 return (T) v; \ 195 } 196 FDC_ACCESSOR(fdunit, FDUNIT, int) 197 198 /* configuration flags for fdc */ 199 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ 200 201 /* error returns for fd_cmd() */ 202 #define FD_FAILED -1 203 #define FD_NOT_VALID -2 204 #define FDC_ERRMAX 100 /* do not log more */ 205 /* 206 * Stop retrying after this many DMA overruns. Since each retry takes 207 * one revolution, with 300 rpm., 25 retries take approximately 5 208 * seconds which the read attempt will block in case the DMA overrun 209 * is persistent. 210 */ 211 #define FDC_DMAOV_MAX 25 212 213 /* 214 * Number of subdevices that can be used for different density types. 215 * By now, the lower 6 bit of the minor number are reserved for this, 216 * allowing for up to 64 subdevices, but we only use 16 out of this. 217 * Density #0 is used for automatic format detection, the other 218 * densities are available as programmable densities (for assignment 219 * by fdcontrol(8)). 220 * The upper 2 bits of the minor number are reserved for the subunit 221 * (drive #) per controller. 222 */ 223 #define NUMDENS 16 224 225 #define BIO_RDSECTID BIO_CMD1 226 227 /* 228 * List of native drive densities. Order must match enum fd_drivetype 229 * in <sys/fdcio.h>. Upon attaching the drive, each of the 230 * programmable subdevices is initialized with the native density 231 * definition. 232 */ 233 static struct fd_type fd_native_types[] = 234 { 235 { 0 }, /* FDT_NONE */ 236 { 9,2,0xFF,0x2A,40, 720,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_360K */ 237 { 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* FDT_12M */ 238 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_720K */ 239 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */ 240 #if 0 /* we currently don't handle 2.88 MB */ 241 { 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /*FDT_288M*/ 242 #else 243 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */ 244 #endif 245 }; 246 247 /* 248 * 360 KB 5.25" and 720 KB 3.5" drives don't have automatic density 249 * selection, they just start out with their native density (or lose). 250 * So 1.2 MB 5.25", 1.44 MB 3.5", and 2.88 MB 3.5" drives have their 251 * respective lists of densities to search for. 252 */ 253 static struct fd_type fd_searchlist_12m[] = { 254 { 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* 1.2M */ 255 { 9,2,0xFF,0x23,40, 720,FDC_300KBPS,2,0x50,1,0,FL_MFM|FL_2STEP }, /* 360K */ 256 { 9,2,0xFF,0x20,80,1440,FDC_300KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 257 }; 258 259 static struct fd_type fd_searchlist_144m[] = { 260 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */ 261 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 262 }; 263 264 /* We search for 1.44M first since this is the most common case. */ 265 static struct fd_type fd_searchlist_288m[] = { 266 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */ 267 #if 0 268 { 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /* 2.88M */ 269 #endif 270 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 271 }; 272 273 #define MAX_SEC_SIZE (128 << 3) 274 #define MAX_CYLINDER 85 /* some people really stress their drives 275 * up to cyl 82 */ 276 #define MAX_HEAD 1 277 278 static devclass_t fdc_devclass; 279 280 /* 281 * Per drive structure (softc). 282 */ 283 struct fd_data { 284 struct fdc_data *fdc; /* pointer to controller structure */ 285 int fdsu; /* this units number on this controller */ 286 enum fd_drivetype type; /* drive type */ 287 struct fd_type *ft; /* pointer to current type descriptor */ 288 struct fd_type fts[NUMDENS]; /* type descriptors */ 289 int flags; 290 #define FD_OPEN 0x01 /* it's open */ 291 #define FD_NONBLOCK 0x02 /* O_NONBLOCK set */ 292 #define FD_ACTIVE 0x04 /* it's active */ 293 #define FD_MOTOR 0x08 /* motor should be on */ 294 #define FD_MOTOR_WAIT 0x10 /* motor coming up */ 295 #define FD_UA 0x20 /* force unit attention */ 296 int skip; 297 int hddrv; 298 #define FD_NO_TRACK -2 299 int track; /* where we think the head is */ 300 int options; /* user configurable options, see fdcio.h */ 301 struct callout_handle toffhandle; 302 struct callout_handle tohandle; 303 struct devstat device_stats; 304 eventhandler_tag clonetag; 305 dev_t masterdev; 306 dev_t clonedevs[NUMDENS - 1]; 307 device_t dev; 308 fdu_t fdu; 309 }; 310 311 struct fdc_ivars { 312 int fdunit; 313 }; 314 static devclass_t fd_devclass; 315 316 /* configuration flags for fd */ 317 #define FD_TYPEMASK 0x0f /* drive type, matches enum 318 * fd_drivetype; on i386 machines, if 319 * given as 0, use RTC type for fd0 320 * and fd1 */ 321 #define FD_DTYPE(flags) ((flags) & FD_TYPEMASK) 322 #define FD_NO_CHLINE 0x10 /* drive does not support changeline 323 * aka. unit attention */ 324 #define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just 325 * assume it is there */ 326 327 /* 328 * Throughout this file the following conventions will be used: 329 * 330 * fd is a pointer to the fd_data struct for the drive in question 331 * fdc is a pointer to the fdc_data struct for the controller 332 * fdu is the floppy drive unit number 333 * fdcu is the floppy controller unit number 334 * fdsu is the floppy drive unit number on that controller. (sub-unit) 335 */ 336 337 /* 338 * Function declarations, same (chaotic) order as they appear in the 339 * file. Re-ordering is too late now, it would only obfuscate the 340 * diffs against old and offspring versions (like the PC98 one). 341 * 342 * Anyone adding functions here, please keep this sequence the same 343 * as below -- makes locating a particular function in the body much 344 * easier. 345 */ 346 static void fdout_wr(fdc_p, u_int8_t); 347 static u_int8_t fdsts_rd(fdc_p); 348 static void fddata_wr(fdc_p, u_int8_t); 349 static u_int8_t fddata_rd(fdc_p); 350 static void fdctl_wr_isa(fdc_p, u_int8_t); 351 #if NCARD > 0 352 static void fdctl_wr_pcmcia(fdc_p, u_int8_t); 353 #endif 354 #if 0 355 static u_int8_t fdin_rd(fdc_p); 356 #endif 357 static int fdc_err(struct fdc_data *, const char *); 358 static int fd_cmd(struct fdc_data *, int, ...); 359 static int enable_fifo(fdc_p fdc); 360 static int fd_sense_drive_status(fdc_p, int *); 361 static int fd_sense_int(fdc_p, int *, int *); 362 static int fd_read_status(fdc_p); 363 static int fdc_alloc_resources(struct fdc_data *); 364 static void fdc_release_resources(struct fdc_data *); 365 static int fdc_read_ivar(device_t, device_t, int, uintptr_t *); 366 static int fdc_probe(device_t); 367 #if NCARD > 0 368 static int fdc_pccard_probe(device_t); 369 #endif 370 static int fdc_detach(device_t dev); 371 static void fdc_add_child(device_t, const char *, int); 372 static int fdc_attach(device_t); 373 static int fdc_print_child(device_t, device_t); 374 static void fd_clone (void *, char *, int, dev_t *); 375 static int fd_probe(device_t); 376 static int fd_attach(device_t); 377 static int fd_detach(device_t); 378 static void set_motor(struct fdc_data *, int, int); 379 # define TURNON 1 380 # define TURNOFF 0 381 static timeout_t fd_turnoff; 382 static timeout_t fd_motor_on; 383 static void fd_turnon(struct fd_data *); 384 static void fdc_reset(fdc_p); 385 static int fd_in(struct fdc_data *, int *); 386 static int out_fdc(struct fdc_data *, int); 387 /* 388 * The open function is named Fdopen() to avoid confusion with fdopen() 389 * in fd(4). The difference is now only meaningful for debuggers. 390 */ 391 static d_open_t Fdopen; 392 static d_close_t fdclose; 393 static d_strategy_t fdstrategy; 394 static void fdstart(struct fdc_data *); 395 static timeout_t fd_iotimeout; 396 static timeout_t fd_pseudointr; 397 static driver_intr_t fdc_intr; 398 static int fdcpio(fdc_p, long, caddr_t, u_int); 399 static int fdautoselect(dev_t); 400 static int fdstate(struct fdc_data *); 401 static int retrier(struct fdc_data *); 402 static void fdbiodone(struct bio *); 403 static int fdmisccmd(dev_t, u_int, void *); 404 static d_ioctl_t fdioctl; 405 406 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 407 408 #ifdef FDC_DEBUG 409 /* CAUTION: fd_debug causes huge amounts of logging output */ 410 static int volatile fd_debug = 0; 411 #define TRACE0(arg) do { if (fd_debug) printf(arg); } while (0) 412 #define TRACE1(arg1, arg2) do { if (fd_debug) printf(arg1, arg2); } while (0) 413 #else /* FDC_DEBUG */ 414 #define TRACE0(arg) do { } while (0) 415 #define TRACE1(arg1, arg2) do { } while (0) 416 #endif /* FDC_DEBUG */ 417 418 /* 419 * Bus space handling (access to low-level IO). 420 */ 421 static void 422 fdout_wr(fdc_p fdc, u_int8_t v) 423 { 424 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 425 } 426 427 static u_int8_t 428 fdsts_rd(fdc_p fdc) 429 { 430 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 431 } 432 433 static void 434 fddata_wr(fdc_p fdc, u_int8_t v) 435 { 436 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 437 } 438 439 static u_int8_t 440 fddata_rd(fdc_p fdc) 441 { 442 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 443 } 444 445 static void 446 fdctl_wr_isa(fdc_p fdc, u_int8_t v) 447 { 448 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 449 } 450 451 #if NCARD > 0 452 static void 453 fdctl_wr_pcmcia(fdc_p fdc, u_int8_t v) 454 { 455 bus_space_write_1(fdc->portt, fdc->porth, FDCTL+fdc->port_off, v); 456 } 457 #endif 458 459 static u_int8_t 460 fdin_rd(fdc_p fdc) 461 { 462 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 463 } 464 465 #define CDEV_MAJOR 9 466 static struct cdevsw fd_cdevsw = { 467 /* open */ Fdopen, 468 /* close */ fdclose, 469 /* read */ physread, 470 /* write */ physwrite, 471 /* ioctl */ fdioctl, 472 /* poll */ nopoll, 473 /* mmap */ nommap, 474 /* strategy */ fdstrategy, 475 /* name */ "fd", 476 /* maj */ CDEV_MAJOR, 477 /* dump */ nodump, 478 /* psize */ nopsize, 479 /* flags */ D_DISK, 480 }; 481 482 /* 483 * Auxiliary functions. Well, some only. Others are scattered 484 * throughout the entire file. 485 */ 486 static int 487 fdc_err(struct fdc_data *fdc, const char *s) 488 { 489 fdc->fdc_errs++; 490 if (s) { 491 if (fdc->fdc_errs < FDC_ERRMAX) 492 device_printf(fdc->fdc_dev, "%s", s); 493 else if (fdc->fdc_errs == FDC_ERRMAX) 494 device_printf(fdc->fdc_dev, "too many errors, not " 495 "logging any more\n"); 496 } 497 498 return FD_FAILED; 499 } 500 501 /* 502 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 503 * Unit number, 504 * # of output bytes, output bytes as ints ..., 505 * # of input bytes, input bytes as ints ... 506 */ 507 static int 508 fd_cmd(struct fdc_data *fdc, int n_out, ...) 509 { 510 u_char cmd; 511 int n_in; 512 int n; 513 va_list ap; 514 515 va_start(ap, n_out); 516 cmd = (u_char)(va_arg(ap, int)); 517 va_end(ap); 518 va_start(ap, n_out); 519 for (n = 0; n < n_out; n++) 520 { 521 if (out_fdc(fdc, va_arg(ap, int)) < 0) 522 { 523 char msg[50]; 524 snprintf(msg, sizeof(msg), 525 "cmd %x failed at out byte %d of %d\n", 526 cmd, n + 1, n_out); 527 return fdc_err(fdc, msg); 528 } 529 } 530 n_in = va_arg(ap, int); 531 for (n = 0; n < n_in; n++) 532 { 533 int *ptr = va_arg(ap, int *); 534 if (fd_in(fdc, ptr) < 0) 535 { 536 char msg[50]; 537 snprintf(msg, sizeof(msg), 538 "cmd %02x failed at in byte %d of %d\n", 539 cmd, n + 1, n_in); 540 return fdc_err(fdc, msg); 541 } 542 } 543 544 return 0; 545 } 546 547 static int 548 enable_fifo(fdc_p fdc) 549 { 550 int i, j; 551 552 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 553 554 /* 555 * Cannot use fd_cmd the normal way here, since 556 * this might be an invalid command. Thus we send the 557 * first byte, and check for an early turn of data directon. 558 */ 559 560 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 561 return fdc_err(fdc, "Enable FIFO failed\n"); 562 563 /* If command is invalid, return */ 564 j = 100000; 565 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 566 != NE7_RQM && j-- > 0) 567 if (i == (NE7_DIO | NE7_RQM)) { 568 fdc_reset(fdc); 569 return FD_FAILED; 570 } 571 if (j<0 || 572 fd_cmd(fdc, 3, 573 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 574 fdc_reset(fdc); 575 return fdc_err(fdc, "Enable FIFO failed\n"); 576 } 577 fdc->flags |= FDC_HAS_FIFO; 578 return 0; 579 } 580 if (fd_cmd(fdc, 4, 581 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 582 return fdc_err(fdc, "Re-enable FIFO failed\n"); 583 return 0; 584 } 585 586 static int 587 fd_sense_drive_status(fdc_p fdc, int *st3p) 588 { 589 int st3; 590 591 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 592 { 593 return fdc_err(fdc, "Sense Drive Status failed\n"); 594 } 595 if (st3p) 596 *st3p = st3; 597 598 return 0; 599 } 600 601 static int 602 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 603 { 604 int cyl, st0, ret; 605 606 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 607 if (ret) { 608 (void)fdc_err(fdc, 609 "sense intr err reading stat reg 0\n"); 610 return ret; 611 } 612 613 if (st0p) 614 *st0p = st0; 615 616 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 617 /* 618 * There doesn't seem to have been an interrupt. 619 */ 620 return FD_NOT_VALID; 621 } 622 623 if (fd_in(fdc, &cyl) < 0) { 624 return fdc_err(fdc, "can't get cyl num\n"); 625 } 626 627 if (cylp) 628 *cylp = cyl; 629 630 return 0; 631 } 632 633 634 static int 635 fd_read_status(fdc_p fdc) 636 { 637 int i, ret; 638 639 for (i = ret = 0; i < 7; i++) { 640 /* 641 * XXX types are poorly chosen. Only bytes can be read 642 * from the hardware, but fdc->status[] wants u_ints and 643 * fd_in() gives ints. 644 */ 645 int status; 646 647 ret = fd_in(fdc, &status); 648 fdc->status[i] = status; 649 if (ret != 0) 650 break; 651 } 652 653 if (ret == 0) 654 fdc->flags |= FDC_STAT_VALID; 655 else 656 fdc->flags &= ~FDC_STAT_VALID; 657 658 return ret; 659 } 660 661 static int 662 fdc_alloc_resources(struct fdc_data *fdc) 663 { 664 device_t dev; 665 int ispnp, ispcmcia, nports; 666 667 dev = fdc->fdc_dev; 668 ispnp = (fdc->flags & FDC_ISPNP) != 0; 669 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 670 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 671 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 672 673 /* 674 * On standard ISA, we don't just use an 8 port range 675 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 676 * register at 0x3f6. 677 * 678 * Isn't PC hardware wonderful. 679 * 680 * The Y-E Data PCMCIA FDC doesn't have this problem, it 681 * uses the register with offset 6 for pseudo-DMA, and the 682 * one with offset 7 as control register. 683 */ 684 nports = ispcmcia ? 8 : (ispnp ? 1 : 6); 685 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 686 &fdc->rid_ioport, 0ul, ~0ul, 687 nports, RF_ACTIVE); 688 if (fdc->res_ioport == 0) { 689 device_printf(dev, "cannot reserve I/O port range (%d ports)\n", 690 nports); 691 return ENXIO; 692 } 693 fdc->portt = rman_get_bustag(fdc->res_ioport); 694 fdc->porth = rman_get_bushandle(fdc->res_ioport); 695 696 if (!ispcmcia) { 697 /* 698 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 699 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 700 * by checking the size and adjust the port address 701 * accordingly. 702 */ 703 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 704 fdc->port_off = -2; 705 706 /* 707 * Register the control port range as rid 1 if it 708 * isn't there already. Most PnP BIOSen will have 709 * already done this but non-PnP configurations don't. 710 * 711 * And some (!!) report 0x3f2-0x3f5 and completely 712 * leave out the control register! It seems that some 713 * non-antique controller chips have a different 714 * method of programming the transfer speed which 715 * doesn't require the control register, but it's 716 * mighty bogus as the chip still responds to the 717 * address for the control register. 718 */ 719 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 720 u_long ctlstart; 721 722 /* Find the control port, usually 0x3f7 */ 723 ctlstart = rman_get_start(fdc->res_ioport) + 724 fdc->port_off + 7; 725 726 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); 727 } 728 729 /* 730 * Now (finally!) allocate the control port. 731 */ 732 fdc->rid_ctl = 1; 733 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 734 &fdc->rid_ctl, 735 0ul, ~0ul, 1, RF_ACTIVE); 736 if (fdc->res_ctl == 0) { 737 device_printf(dev, 738 "cannot reserve control I/O port range (control port)\n"); 739 return ENXIO; 740 } 741 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 742 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 743 } 744 745 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 746 &fdc->rid_irq, 0ul, ~0ul, 1, 747 RF_ACTIVE); 748 if (fdc->res_irq == 0) { 749 device_printf(dev, "cannot reserve interrupt line\n"); 750 return ENXIO; 751 } 752 753 if ((fdc->flags & FDC_NODMA) == 0) { 754 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 755 &fdc->rid_drq, 0ul, ~0ul, 1, 756 RF_ACTIVE); 757 if (fdc->res_drq == 0) { 758 device_printf(dev, "cannot reserve DMA request line\n"); 759 return ENXIO; 760 } 761 fdc->dmachan = fdc->res_drq->r_start; 762 } 763 764 return 0; 765 } 766 767 static void 768 fdc_release_resources(struct fdc_data *fdc) 769 { 770 device_t dev; 771 772 dev = fdc->fdc_dev; 773 if (fdc->res_irq != 0) { 774 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 775 fdc->res_irq); 776 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 777 fdc->res_irq); 778 } 779 if (fdc->res_ctl != 0) { 780 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 781 fdc->res_ctl); 782 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 783 fdc->res_ctl); 784 } 785 if (fdc->res_ioport != 0) { 786 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 787 fdc->res_ioport); 788 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 789 fdc->res_ioport); 790 } 791 if (fdc->res_drq != 0) { 792 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 793 fdc->res_drq); 794 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 795 fdc->res_drq); 796 } 797 } 798 799 /* 800 * Configuration/initialization stuff, per controller. 801 */ 802 803 static struct isa_pnp_id fdc_ids[] = { 804 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 805 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 806 {0} 807 }; 808 809 static int 810 fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 811 { 812 struct fdc_ivars *ivars = device_get_ivars(child); 813 814 switch (which) { 815 case FDC_IVAR_FDUNIT: 816 *result = ivars->fdunit; 817 break; 818 default: 819 return ENOENT; 820 } 821 return 0; 822 } 823 824 static int 825 fdc_probe(device_t dev) 826 { 827 int error, ic_type; 828 struct fdc_data *fdc; 829 830 fdc = device_get_softc(dev); 831 bzero(fdc, sizeof *fdc); 832 fdc->fdc_dev = dev; 833 fdc->fdctl_wr = fdctl_wr_isa; 834 835 /* Check pnp ids */ 836 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 837 if (error == ENXIO) 838 return ENXIO; 839 if (error == 0) 840 fdc->flags |= FDC_ISPNP; 841 842 /* Attempt to allocate our resources for the duration of the probe */ 843 error = fdc_alloc_resources(fdc); 844 if (error) 845 goto out; 846 847 /* First - lets reset the floppy controller */ 848 fdout_wr(fdc, 0); 849 DELAY(100); 850 fdout_wr(fdc, FDO_FRST); 851 852 /* see if it can handle a command */ 853 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 854 NE7_SPEC_2(2, 0), 0)) { 855 error = ENXIO; 856 goto out; 857 } 858 859 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 860 ic_type = (u_char)ic_type; 861 switch (ic_type) { 862 case 0x80: 863 device_set_desc(dev, "NEC 765 or clone"); 864 fdc->fdct = FDC_NE765; 865 break; 866 case 0x81: /* not mentioned in any hardware doc */ 867 case 0x90: 868 device_set_desc(dev, 869 "enhanced floppy controller (i82077, NE72065 or clone)"); 870 fdc->fdct = FDC_ENHANCED; 871 break; 872 default: 873 device_set_desc(dev, "generic floppy controller"); 874 fdc->fdct = FDC_UNKNOWN; 875 break; 876 } 877 } 878 879 out: 880 fdc_release_resources(fdc); 881 return (error); 882 } 883 884 #if NCARD > 0 885 886 static int 887 fdc_pccard_probe(device_t dev) 888 { 889 int error; 890 struct fdc_data *fdc; 891 892 fdc = device_get_softc(dev); 893 bzero(fdc, sizeof *fdc); 894 fdc->fdc_dev = dev; 895 fdc->fdctl_wr = fdctl_wr_pcmcia; 896 897 fdc->flags |= FDC_ISPCMCIA | FDC_NODMA; 898 899 /* Attempt to allocate our resources for the duration of the probe */ 900 error = fdc_alloc_resources(fdc); 901 if (error) 902 goto out; 903 904 /* First - lets reset the floppy controller */ 905 fdout_wr(fdc, 0); 906 DELAY(100); 907 fdout_wr(fdc, FDO_FRST); 908 909 /* see if it can handle a command */ 910 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 911 NE7_SPEC_2(2, 0), 0)) { 912 error = ENXIO; 913 goto out; 914 } 915 916 device_set_desc(dev, "Y-E Data PCMCIA floppy"); 917 fdc->fdct = FDC_NE765; 918 919 out: 920 fdc_release_resources(fdc); 921 return (error); 922 } 923 924 #endif /* NCARD > 0 */ 925 926 static int 927 fdc_detach(device_t dev) 928 { 929 struct fdc_data *fdc; 930 int error; 931 932 fdc = device_get_softc(dev); 933 934 /* have our children detached first */ 935 if ((error = bus_generic_detach(dev))) 936 return (error); 937 938 /* reset controller, turn motor off */ 939 fdout_wr(fdc, 0); 940 941 if ((fdc->flags & FDC_NODMA) == 0) 942 isa_dma_release(fdc->dmachan); 943 944 if ((fdc->flags & FDC_ATTACHED) == 0) { 945 device_printf(dev, "already unloaded\n"); 946 return (0); 947 } 948 fdc->flags &= ~FDC_ATTACHED; 949 950 BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq, 951 fdc->fdc_intr); 952 fdc_release_resources(fdc); 953 device_printf(dev, "unload\n"); 954 return (0); 955 } 956 957 /* 958 * Add a child device to the fdc controller. It will then be probed etc. 959 */ 960 static void 961 fdc_add_child(device_t dev, const char *name, int unit) 962 { 963 int disabled, flags; 964 struct fdc_ivars *ivar; 965 device_t child; 966 967 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO); 968 if (ivar == NULL) 969 return; 970 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 971 ivar->fdunit = 0; 972 child = device_add_child(dev, name, unit); 973 if (child == NULL) 974 return; 975 device_set_ivars(child, ivar); 976 if (resource_int_value(name, unit, "flags", &flags) == 0) 977 device_set_flags(child, flags); 978 if (resource_int_value(name, unit, "disabled", &disabled) == 0 979 && disabled != 0) 980 device_disable(child); 981 } 982 983 static int 984 fdc_attach(device_t dev) 985 { 986 struct fdc_data *fdc; 987 const char *name, *dname; 988 int i, error, dunit; 989 990 fdc = device_get_softc(dev); 991 error = fdc_alloc_resources(fdc); 992 if (error) { 993 device_printf(dev, "cannot re-acquire resources\n"); 994 return error; 995 } 996 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 997 INTR_TYPE_BIO | INTR_ENTROPY, fdc_intr, fdc, 998 &fdc->fdc_intr); 999 if (error) { 1000 device_printf(dev, "cannot setup interrupt\n"); 1001 return error; 1002 } 1003 fdc->fdcu = device_get_unit(dev); 1004 fdc->flags |= FDC_ATTACHED | FDC_NEEDS_RESET; 1005 1006 if ((fdc->flags & FDC_NODMA) == 0) { 1007 /* 1008 * Acquire the DMA channel forever, the driver will do 1009 * the rest 1010 * XXX should integrate with rman 1011 */ 1012 isa_dma_acquire(fdc->dmachan); 1013 isa_dmainit(fdc->dmachan, MAX_SEC_SIZE); 1014 } 1015 fdc->state = DEVIDLE; 1016 1017 /* reset controller, turn motor off, clear fdout mirror reg */ 1018 fdout_wr(fdc, fdc->fdout = 0); 1019 bioq_init(&fdc->head); 1020 1021 /* 1022 * Probe and attach any children. We should probably detect 1023 * devices from the BIOS unless overridden. 1024 */ 1025 name = device_get_nameunit(dev); 1026 i = 0; 1027 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) 1028 fdc_add_child(dev, dname, dunit); 1029 1030 if ((error = bus_generic_attach(dev)) != 0) 1031 return (error); 1032 1033 return (0); 1034 } 1035 1036 static int 1037 fdc_print_child(device_t me, device_t child) 1038 { 1039 int retval = 0, flags; 1040 1041 retval += bus_print_child_header(me, child); 1042 retval += printf(" on %s drive %d", device_get_nameunit(me), 1043 fdc_get_fdunit(child)); 1044 if ((flags = device_get_flags(me)) != 0) 1045 retval += printf(" flags %#x", flags); 1046 retval += printf("\n"); 1047 1048 return (retval); 1049 } 1050 1051 static device_method_t fdc_methods[] = { 1052 /* Device interface */ 1053 DEVMETHOD(device_probe, fdc_probe), 1054 DEVMETHOD(device_attach, fdc_attach), 1055 DEVMETHOD(device_detach, fdc_detach), 1056 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1057 DEVMETHOD(device_suspend, bus_generic_suspend), 1058 DEVMETHOD(device_resume, bus_generic_resume), 1059 1060 /* Bus interface */ 1061 DEVMETHOD(bus_print_child, fdc_print_child), 1062 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 1063 /* Our children never use any other bus interface methods. */ 1064 1065 { 0, 0 } 1066 }; 1067 1068 static driver_t fdc_driver = { 1069 "fdc", 1070 fdc_methods, 1071 sizeof(struct fdc_data) 1072 }; 1073 1074 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 1075 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, 0, 0); 1076 1077 #if NCARD > 0 1078 1079 static device_method_t fdc_pccard_methods[] = { 1080 /* Device interface */ 1081 DEVMETHOD(device_probe, fdc_pccard_probe), 1082 DEVMETHOD(device_attach, fdc_attach), 1083 DEVMETHOD(device_detach, fdc_detach), 1084 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1085 DEVMETHOD(device_suspend, bus_generic_suspend), 1086 DEVMETHOD(device_resume, bus_generic_resume), 1087 1088 /* Bus interface */ 1089 DEVMETHOD(bus_print_child, fdc_print_child), 1090 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 1091 /* Our children never use any other bus interface methods. */ 1092 1093 { 0, 0 } 1094 }; 1095 1096 static driver_t fdc_pccard_driver = { 1097 "fdc", 1098 fdc_pccard_methods, 1099 sizeof(struct fdc_data) 1100 }; 1101 1102 DRIVER_MODULE(fdc, pccard, fdc_pccard_driver, fdc_devclass, 0, 0); 1103 1104 #endif /* NCARD > 0 */ 1105 1106 /* 1107 * Create a clone device upon request by devfs. 1108 */ 1109 static void 1110 fd_clone(void *arg, char *name, int namelen, dev_t *dev) 1111 { 1112 struct fd_data *fd; 1113 int i, u; 1114 char *n; 1115 size_t l; 1116 1117 fd = (struct fd_data *)arg; 1118 if (*dev != NODEV) 1119 return; 1120 if (dev_stdclone(name, &n, "fd", &u) != 2) 1121 return; 1122 l = strlen(n); 1123 if (l == 1 && *n >= 'a' && *n <= 'h') { 1124 /* 1125 * Trailing letters a through h denote 1126 * pseudo-partitions. We don't support true 1127 * (UFS-style) partitions, so we just implement them 1128 * as symlinks if someone asks us nicely. 1129 */ 1130 *dev = make_dev_alias(fd->masterdev, name); 1131 return; 1132 } 1133 if (l >= 2 && l <= 5 && *n == '.') { 1134 /* 1135 * Trailing numbers, preceded by a dot, denote 1136 * subdevices for different densities. Historically, 1137 * they have been named by density (like fd0.1440), 1138 * but we allow arbitrary numbers between 1 and 4 1139 * digits, so fd0.1 through fd0.15 are possible as 1140 * well. 1141 */ 1142 for (i = 1; i < l; i++) 1143 if (n[i] < '0' || n[i] > '9') 1144 return; 1145 for (i = 0; i < NUMDENS - 1; i++) 1146 if (fd->clonedevs[i] == NODEV) { 1147 *dev = make_dev(&fd_cdevsw, 1148 FDNUMTOUNIT(u) + i + 1, 1149 UID_ROOT, GID_OPERATOR, 0640, 1150 name); 1151 fd->clonedevs[i] = *dev; 1152 return; 1153 } 1154 } 1155 } 1156 1157 /* 1158 * Configuration/initialization, per drive. 1159 */ 1160 static int 1161 fd_probe(device_t dev) 1162 { 1163 int i; 1164 u_int st0, st3; 1165 struct fd_data *fd; 1166 struct fdc_data *fdc; 1167 fdsu_t fdsu; 1168 int flags; 1169 1170 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 1171 fd = device_get_softc(dev); 1172 fdc = device_get_softc(device_get_parent(dev)); 1173 flags = device_get_flags(dev); 1174 1175 bzero(fd, sizeof *fd); 1176 fd->dev = dev; 1177 fd->fdc = fdc; 1178 fd->fdsu = fdsu; 1179 fd->fdu = device_get_unit(dev); 1180 fd->flags = FD_UA; /* make sure fdautoselect() will be called */ 1181 1182 fd->type = FD_DTYPE(flags); 1183 /* 1184 * XXX I think using __i386__ is wrong here since we actually want to probe 1185 * for the machine type, not the CPU type (so non-PC arch's like the PC98 will 1186 * fail the probe). However, for whatever reason, testing for _MACHINE_ARCH 1187 * == i386 breaks the test on FreeBSD/Alpha. 1188 */ 1189 #ifdef __i386__ 1190 if (fd->type == FDT_NONE && (fd->fdu == 0 || fd->fdu == 1)) { 1191 /* Look up what the BIOS thinks we have. */ 1192 if (fd->fdu == 0) { 1193 if ((fdc->flags & FDC_ISPCMCIA)) 1194 /* 1195 * Somewhat special. No need to force the 1196 * user to set device flags, since the Y-E 1197 * Data PCMCIA floppy is always a 1.44 MB 1198 * device. 1199 */ 1200 fd->type = FDT_144M; 1201 else 1202 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4; 1203 } else { 1204 fd->type = rtcin(RTC_FDISKETTE) & 0x0f; 1205 } 1206 if (fd->type == FDT_288M_1) 1207 fd->type = FDT_288M; 1208 } 1209 #endif /* __i386__ */ 1210 /* is there a unit? */ 1211 if (fd->type == FDT_NONE) 1212 return (ENXIO); 1213 1214 /* select it */ 1215 set_motor(fdc, fdsu, TURNON); 1216 fdc_reset(fdc); /* XXX reset, then unreset, etc. */ 1217 DELAY(1000000); /* 1 sec */ 1218 1219 /* XXX This doesn't work before the first set_motor() */ 1220 if ((fdc->flags & FDC_HAS_FIFO) == 0 && 1221 fdc->fdct == FDC_ENHANCED && 1222 (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 && 1223 enable_fifo(fdc) == 0) { 1224 device_printf(device_get_parent(dev), 1225 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 1226 } 1227 1228 if ((flags & FD_NO_PROBE) == 0) { 1229 /* If we're at track 0 first seek inwards. */ 1230 if ((fd_sense_drive_status(fdc, &st3) == 0) && 1231 (st3 & NE7_ST3_T0)) { 1232 /* Seek some steps... */ 1233 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 1234 /* ...wait a moment... */ 1235 DELAY(300000); 1236 /* make ctrlr happy: */ 1237 fd_sense_int(fdc, 0, 0); 1238 } 1239 } 1240 1241 for (i = 0; i < 2; i++) { 1242 /* 1243 * we must recalibrate twice, just in case the 1244 * heads have been beyond cylinder 76, since 1245 * most FDCs still barf when attempting to 1246 * recalibrate more than 77 steps 1247 */ 1248 /* go back to 0: */ 1249 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 1250 /* a second being enough for full stroke seek*/ 1251 DELAY(i == 0 ? 1000000 : 300000); 1252 1253 /* anything responding? */ 1254 if (fd_sense_int(fdc, &st0, 0) == 0 && 1255 (st0 & NE7_ST0_EC) == 0) 1256 break; /* already probed succesfully */ 1257 } 1258 } 1259 } 1260 1261 set_motor(fdc, fdsu, TURNOFF); 1262 1263 if ((flags & FD_NO_PROBE) == 0 && 1264 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */ 1265 return (ENXIO); 1266 1267 switch (fd->type) { 1268 case FDT_12M: 1269 device_set_desc(dev, "1200-KB 5.25\" drive"); 1270 fd->type = FDT_12M; 1271 break; 1272 case FDT_144M: 1273 device_set_desc(dev, "1440-KB 3.5\" drive"); 1274 fd->type = FDT_144M; 1275 break; 1276 case FDT_288M: 1277 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 1278 fd->type = FDT_288M; 1279 break; 1280 case FDT_360K: 1281 device_set_desc(dev, "360-KB 5.25\" drive"); 1282 fd->type = FDT_360K; 1283 break; 1284 case FDT_720K: 1285 device_set_desc(dev, "720-KB 3.5\" drive"); 1286 fd->type = FDT_720K; 1287 break; 1288 default: 1289 return (ENXIO); 1290 } 1291 fd->track = FD_NO_TRACK; 1292 fd->fdc = fdc; 1293 fd->fdsu = fdsu; 1294 fd->options = 0; 1295 callout_handle_init(&fd->toffhandle); 1296 callout_handle_init(&fd->tohandle); 1297 1298 /* initialize densities for subdevices */ 1299 for (i = 0; i < NUMDENS; i++) 1300 memcpy(fd->fts + i, fd_native_types + fd->type, 1301 sizeof(struct fd_type)); 1302 return (0); 1303 } 1304 1305 static int 1306 fd_attach(device_t dev) 1307 { 1308 struct fd_data *fd; 1309 static int cdevsw_add_done; 1310 int i; 1311 1312 if (!cdevsw_add_done) { 1313 cdevsw_add(&fd_cdevsw); /* XXX */ 1314 cdevsw_add_done = 1; 1315 } 1316 fd = device_get_softc(dev); 1317 fd->clonetag = EVENTHANDLER_REGISTER(dev_clone, fd_clone, fd, 1000); 1318 fd->masterdev = make_dev(&fd_cdevsw, fd->fdu << 6, 1319 UID_ROOT, GID_OPERATOR, 0640, "fd%d", fd->fdu); 1320 for (i = 0; i < NUMDENS - 1; i++) 1321 fd->clonedevs[i] = NODEV; 1322 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1323 device_get_unit(dev), 0, DEVSTAT_NO_ORDERED_TAGS, 1324 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1325 DEVSTAT_PRIORITY_FD); 1326 return (0); 1327 } 1328 1329 static int 1330 fd_detach(device_t dev) 1331 { 1332 struct fd_data *fd; 1333 int i; 1334 1335 fd = device_get_softc(dev); 1336 untimeout(fd_turnoff, fd, fd->toffhandle); 1337 devstat_remove_entry(&fd->device_stats); 1338 destroy_dev(fd->masterdev); 1339 for (i = 0; i < NUMDENS - 1; i++) 1340 if (fd->clonedevs[i] != NODEV) 1341 destroy_dev(fd->clonedevs[i]); 1342 cdevsw_remove(&fd_cdevsw); 1343 EVENTHANDLER_DEREGISTER(dev_clone, fd->clonetag); 1344 1345 return (0); 1346 } 1347 1348 static device_method_t fd_methods[] = { 1349 /* Device interface */ 1350 DEVMETHOD(device_probe, fd_probe), 1351 DEVMETHOD(device_attach, fd_attach), 1352 DEVMETHOD(device_detach, fd_detach), 1353 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1354 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1355 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1356 1357 { 0, 0 } 1358 }; 1359 1360 static driver_t fd_driver = { 1361 "fd", 1362 fd_methods, 1363 sizeof(struct fd_data) 1364 }; 1365 1366 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1367 1368 /* 1369 * More auxiliary functions. 1370 */ 1371 /* 1372 * Motor control stuff. 1373 * Remember to not deselect the drive we're working on. 1374 */ 1375 static void 1376 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1377 { 1378 int fdout; 1379 1380 fdout = fdc->fdout; 1381 if (turnon) { 1382 fdout &= ~FDO_FDSEL; 1383 fdout |= (FDO_MOEN0 << fdsu) | FDO_FDMAEN | FDO_FRST | fdsu; 1384 } else 1385 fdout &= ~(FDO_MOEN0 << fdsu); 1386 fdc->fdout = fdout; 1387 fdout_wr(fdc, fdout); 1388 TRACE1("[0x%x->FDOUT]", fdout); 1389 } 1390 1391 static void 1392 fd_turnoff(void *xfd) 1393 { 1394 int s; 1395 fd_p fd = xfd; 1396 1397 TRACE1("[fd%d: turnoff]", fd->fdu); 1398 1399 s = splbio(); 1400 /* 1401 * Don't turn off the motor yet if the drive is active. 1402 * 1403 * If we got here, this could only mean we missed an interrupt. 1404 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1405 * after a controller reset. Just schedule a pseudo-interrupt 1406 * so the state machine gets re-entered. 1407 */ 1408 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1409 fdc_intr(fd->fdc); 1410 splx(s); 1411 return; 1412 } 1413 1414 fd->flags &= ~FD_MOTOR; 1415 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1416 splx(s); 1417 } 1418 1419 static void 1420 fd_motor_on(void *xfd) 1421 { 1422 int s; 1423 fd_p fd = xfd; 1424 1425 s = splbio(); 1426 fd->flags &= ~FD_MOTOR_WAIT; 1427 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1428 { 1429 fdc_intr(fd->fdc); 1430 } 1431 splx(s); 1432 } 1433 1434 static void 1435 fd_turnon(fd_p fd) 1436 { 1437 if(!(fd->flags & FD_MOTOR)) 1438 { 1439 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1440 set_motor(fd->fdc, fd->fdsu, TURNON); 1441 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */ 1442 } 1443 } 1444 1445 static void 1446 fdc_reset(fdc_p fdc) 1447 { 1448 /* Try a reset, keep motor on */ 1449 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1450 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1451 DELAY(100); 1452 /* enable FDC, but defer interrupts a moment */ 1453 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1454 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1455 DELAY(100); 1456 fdout_wr(fdc, fdc->fdout); 1457 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1458 1459 /* XXX after a reset, silently believe the FDC will accept commands */ 1460 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1461 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1462 0); 1463 if (fdc->flags & FDC_HAS_FIFO) 1464 (void) enable_fifo(fdc); 1465 } 1466 1467 /* 1468 * FDC IO functions, take care of the main status register, timeout 1469 * in case the desired status bits are never set. 1470 */ 1471 static int 1472 fd_in(struct fdc_data *fdc, int *ptr) 1473 { 1474 int i, j = 100000; 1475 while ((i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) 1476 != (NE7_DIO|NE7_RQM) && j-- > 0) 1477 if (i == NE7_RQM) 1478 return fdc_err(fdc, "ready for output in input\n"); 1479 if (j <= 0) 1480 return fdc_err(fdc, bootverbose? "input ready timeout\n": 0); 1481 #ifdef FDC_DEBUG 1482 i = fddata_rd(fdc); 1483 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1484 *ptr = i; 1485 return 0; 1486 #else /* !FDC_DEBUG */ 1487 i = fddata_rd(fdc); 1488 if (ptr) 1489 *ptr = i; 1490 return 0; 1491 #endif /* FDC_DEBUG */ 1492 } 1493 1494 int 1495 out_fdc(struct fdc_data *fdc, int x) 1496 { 1497 int i; 1498 1499 /* Check that the direction bit is set */ 1500 i = 100000; 1501 while ((fdsts_rd(fdc) & NE7_DIO) && i-- > 0); 1502 if (i <= 0) return fdc_err(fdc, "direction bit not set\n"); 1503 1504 /* Check that the floppy controller is ready for a command */ 1505 i = 100000; 1506 while ((fdsts_rd(fdc) & NE7_RQM) == 0 && i-- > 0); 1507 if (i <= 0) 1508 return fdc_err(fdc, bootverbose? "output ready timeout\n": 0); 1509 1510 /* Send the command and return */ 1511 fddata_wr(fdc, x); 1512 TRACE1("[0x%x->FDDATA]", x); 1513 return (0); 1514 } 1515 1516 /* 1517 * Block device driver interface functions (interspersed with even more 1518 * auxiliary functions). 1519 */ 1520 int 1521 Fdopen(dev_t dev, int flags, int mode, struct thread *td) 1522 { 1523 fdu_t fdu = FDUNIT(minor(dev)); 1524 int type = FDTYPE(minor(dev)); 1525 fd_p fd; 1526 fdc_p fdc; 1527 int rv, unitattn, dflags; 1528 1529 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1530 return (ENXIO); 1531 fdc = fd->fdc; 1532 if ((fdc == NULL) || (fd->type == FDT_NONE)) 1533 return (ENXIO); 1534 if (type > NUMDENS) 1535 return (ENXIO); 1536 dflags = device_get_flags(fd->dev); 1537 /* 1538 * This is a bit bogus. It's still possible that e. g. a 1539 * descriptor gets inherited to a child, but then it's at 1540 * least for the same subdevice. By checking FD_OPEN here, we 1541 * can ensure that a device isn't attempted to be opened with 1542 * different densities at the same time where the second open 1543 * could clobber the settings from the first one. 1544 */ 1545 if (fd->flags & FD_OPEN) 1546 return (EBUSY); 1547 1548 if (type == 0) { 1549 if (flags & FNONBLOCK) { 1550 /* 1551 * Unfortunately, physio(9) discards its ioflag 1552 * argument, thus preventing us from seeing the 1553 * IO_NDELAY bit. So we need to keep track 1554 * ourselves. 1555 */ 1556 fd->flags |= FD_NONBLOCK; 1557 fd->ft = 0; 1558 } else { 1559 /* 1560 * Figure out a unit attention condition. 1561 * 1562 * If UA has been forced, proceed. 1563 * 1564 * If motor is off, turn it on for a moment 1565 * and select our drive, in order to read the 1566 * UA hardware signal. 1567 * 1568 * If motor is on, and our drive is currently 1569 * selected, just read the hardware bit. 1570 * 1571 * If motor is on, but active for another 1572 * drive on that controller, we are lost. We 1573 * cannot risk to deselect the other drive, so 1574 * we just assume a forced UA condition to be 1575 * on the safe side. 1576 */ 1577 unitattn = 0; 1578 if ((dflags & FD_NO_CHLINE) != 0 || 1579 (fd->flags & FD_UA) != 0) { 1580 unitattn = 1; 1581 fd->flags &= ~FD_UA; 1582 } else if (fdc->fdout & (FDO_MOEN0 | FDO_MOEN1 | 1583 FDO_MOEN2 | FDO_MOEN3)) { 1584 if ((fdc->fdout & FDO_FDSEL) == fd->fdsu) 1585 unitattn = fdin_rd(fdc) & FDI_DCHG; 1586 else 1587 unitattn = 1; 1588 } else { 1589 set_motor(fdc, fd->fdsu, TURNON); 1590 unitattn = fdin_rd(fdc) & FDI_DCHG; 1591 set_motor(fdc, fd->fdsu, TURNOFF); 1592 } 1593 if (unitattn && (rv = fdautoselect(dev)) != 0) 1594 return (rv); 1595 } 1596 } else { 1597 fd->ft = fd->fts + type; 1598 } 1599 fd->flags |= FD_OPEN; 1600 /* 1601 * Clearing the DMA overrun counter at open time is a bit messy. 1602 * Since we're only managing one counter per controller, opening 1603 * the second drive could mess it up. Anyway, if the DMA overrun 1604 * condition is really persistent, it will eventually time out 1605 * still. OTOH, clearing it here will ensure we'll at least start 1606 * trying again after a previous (maybe even long ago) failure. 1607 * Also, this is merely a stop-gap measure only that should not 1608 * happen during normal operation, so we can tolerate it to be a 1609 * bit sloppy about this. 1610 */ 1611 fdc->dma_overruns = 0; 1612 1613 return 0; 1614 } 1615 1616 int 1617 fdclose(dev_t dev, int flags, int mode, struct thread *td) 1618 { 1619 fdu_t fdu = FDUNIT(minor(dev)); 1620 struct fd_data *fd; 1621 1622 fd = devclass_get_softc(fd_devclass, fdu); 1623 fd->flags &= ~(FD_OPEN | FD_NONBLOCK); 1624 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR); 1625 1626 return (0); 1627 } 1628 1629 void 1630 fdstrategy(struct bio *bp) 1631 { 1632 long blknum, nblocks; 1633 int s; 1634 fdu_t fdu; 1635 fdc_p fdc; 1636 fd_p fd; 1637 size_t fdblk; 1638 1639 fdu = FDUNIT(minor(bp->bio_dev)); 1640 fd = devclass_get_softc(fd_devclass, fdu); 1641 if (fd == 0) 1642 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1643 (u_long)major(bp->bio_dev), (u_long)minor(bp->bio_dev)); 1644 fdc = fd->fdc; 1645 if (fd->type == FDT_NONE || fd->ft == 0) { 1646 bp->bio_error = ENXIO; 1647 bp->bio_flags |= BIO_ERROR; 1648 goto bad; 1649 } 1650 fdblk = 128 << (fd->ft->secsize); 1651 if (bp->bio_cmd != BIO_FORMAT && bp->bio_cmd != BIO_RDSECTID) { 1652 if (fd->flags & FD_NONBLOCK) { 1653 bp->bio_error = EAGAIN; 1654 bp->bio_flags |= BIO_ERROR; 1655 goto bad; 1656 } 1657 if (bp->bio_blkno < 0) { 1658 printf( 1659 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n", 1660 fdu, (u_long)bp->bio_blkno, bp->bio_bcount); 1661 bp->bio_error = EINVAL; 1662 bp->bio_flags |= BIO_ERROR; 1663 goto bad; 1664 } 1665 if ((bp->bio_bcount % fdblk) != 0) { 1666 bp->bio_error = EINVAL; 1667 bp->bio_flags |= BIO_ERROR; 1668 goto bad; 1669 } 1670 } 1671 1672 /* 1673 * Set up block calculations. 1674 */ 1675 if (bp->bio_blkno > 20000000) { 1676 /* 1677 * Reject unreasonably high block number, prevent the 1678 * multiplication below from overflowing. 1679 */ 1680 bp->bio_error = EINVAL; 1681 bp->bio_flags |= BIO_ERROR; 1682 goto bad; 1683 } 1684 blknum = bp->bio_blkno * DEV_BSIZE / fdblk; 1685 nblocks = fd->ft->size; 1686 if (blknum + bp->bio_bcount / fdblk > nblocks) { 1687 if (blknum >= nblocks) { 1688 if (bp->bio_cmd == BIO_READ) 1689 bp->bio_resid = bp->bio_bcount; 1690 else { 1691 bp->bio_error = ENOSPC; 1692 bp->bio_flags |= BIO_ERROR; 1693 } 1694 goto bad; /* not always bad, but EOF */ 1695 } 1696 bp->bio_bcount = (nblocks - blknum) * fdblk; 1697 } 1698 bp->bio_pblkno = bp->bio_blkno; 1699 s = splbio(); 1700 bioqdisksort(&fdc->head, bp); 1701 untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */ 1702 devstat_start_transaction(&fd->device_stats); 1703 device_busy(fd->dev); 1704 fdstart(fdc); 1705 splx(s); 1706 return; 1707 1708 bad: 1709 biodone(bp); 1710 } 1711 1712 /* 1713 * fdstart 1714 * 1715 * We have just queued something. If the controller is not busy 1716 * then simulate the case where it has just finished a command 1717 * So that it (the interrupt routine) looks on the queue for more 1718 * work to do and picks up what we just added. 1719 * 1720 * If the controller is already busy, we need do nothing, as it 1721 * will pick up our work when the present work completes. 1722 */ 1723 static void 1724 fdstart(struct fdc_data *fdc) 1725 { 1726 int s; 1727 1728 s = splbio(); 1729 if(fdc->state == DEVIDLE) 1730 { 1731 fdc_intr(fdc); 1732 } 1733 splx(s); 1734 } 1735 1736 static void 1737 fd_iotimeout(void *xfdc) 1738 { 1739 fdc_p fdc; 1740 int s; 1741 1742 fdc = xfdc; 1743 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1744 1745 /* 1746 * Due to IBM's brain-dead design, the FDC has a faked ready 1747 * signal, hardwired to ready == true. Thus, any command 1748 * issued if there's no diskette in the drive will _never_ 1749 * complete, and must be aborted by resetting the FDC. 1750 * Many thanks, Big Blue! 1751 * The FDC must not be reset directly, since that would 1752 * interfere with the state machine. Instead, pretend that 1753 * the command completed but was invalid. The state machine 1754 * will reset the FDC and retry once. 1755 */ 1756 s = splbio(); 1757 fdc->status[0] = NE7_ST0_IC_IV; 1758 fdc->flags &= ~FDC_STAT_VALID; 1759 fdc->state = IOTIMEDOUT; 1760 fdc_intr(fdc); 1761 splx(s); 1762 } 1763 1764 /* Just ensure it has the right spl. */ 1765 static void 1766 fd_pseudointr(void *xfdc) 1767 { 1768 int s; 1769 1770 s = splbio(); 1771 fdc_intr(xfdc); 1772 splx(s); 1773 } 1774 1775 /* 1776 * fdc_intr 1777 * 1778 * Keep calling the state machine until it returns a 0. 1779 * Always called at splbio. 1780 */ 1781 static void 1782 fdc_intr(void *xfdc) 1783 { 1784 fdc_p fdc = xfdc; 1785 while(fdstate(fdc)) 1786 ; 1787 } 1788 1789 /* 1790 * Magic pseudo-DMA initialization for YE FDC. Sets count and 1791 * direction. 1792 */ 1793 #define SET_BCDR(fdc,wr,cnt,port) \ 1794 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1795 ((cnt)-1) & 0xff); \ 1796 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1797 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1798 1799 /* 1800 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy. 1801 */ 1802 static int 1803 fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count) 1804 { 1805 u_char *cptr = (u_char *)addr; 1806 1807 if (flags == BIO_READ) { 1808 if (fdc->state != PIOREAD) { 1809 fdc->state = PIOREAD; 1810 return(0); 1811 } 1812 SET_BCDR(fdc, 0, count, 0); 1813 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1814 FDC_YE_DATAPORT, cptr, count); 1815 } else { 1816 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1817 FDC_YE_DATAPORT, cptr, count); 1818 SET_BCDR(fdc, 0, count, 0); 1819 } 1820 return(1); 1821 } 1822 1823 /* 1824 * Try figuring out the density of the media present in our device. 1825 */ 1826 static int 1827 fdautoselect(dev_t dev) 1828 { 1829 fdu_t fdu; 1830 fd_p fd; 1831 struct fd_type *fdtp; 1832 struct fdc_readid id; 1833 int i, n, oopts, rv; 1834 1835 fdu = FDUNIT(minor(dev)); 1836 fd = devclass_get_softc(fd_devclass, fdu); 1837 1838 switch (fd->type) { 1839 default: 1840 return (ENXIO); 1841 1842 case FDT_360K: 1843 case FDT_720K: 1844 /* no autoselection on those drives */ 1845 fd->ft = fd_native_types + fd->type; 1846 return (0); 1847 1848 case FDT_12M: 1849 fdtp = fd_searchlist_12m; 1850 n = sizeof fd_searchlist_12m / sizeof(struct fd_type); 1851 break; 1852 1853 case FDT_144M: 1854 fdtp = fd_searchlist_144m; 1855 n = sizeof fd_searchlist_144m / sizeof(struct fd_type); 1856 break; 1857 1858 case FDT_288M: 1859 fdtp = fd_searchlist_288m; 1860 n = sizeof fd_searchlist_288m / sizeof(struct fd_type); 1861 break; 1862 } 1863 1864 /* 1865 * Try reading sector ID fields, first at cylinder 0, head 0, 1866 * then at cylinder 2, head N. We don't probe cylinder 1, 1867 * since for 5.25in DD media in a HD drive, there are no data 1868 * to read (2 step pulses per media cylinder required). For 1869 * two-sided media, the second probe always goes to head 1, so 1870 * we can tell them apart from single-sided media. As a 1871 * side-effect this means that single-sided media should be 1872 * mentioned in the search list after two-sided media of an 1873 * otherwise identical density. Media with a different number 1874 * of sectors per track but otherwise identical parameters 1875 * cannot be distinguished at all. 1876 * 1877 * If we successfully read an ID field on both cylinders where 1878 * the recorded values match our expectation, we are done. 1879 * Otherwise, we try the next density entry from the table. 1880 * 1881 * Stepping to cylinder 2 has the side-effect of clearing the 1882 * unit attention bit. 1883 */ 1884 oopts = fd->options; 1885 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY; 1886 for (i = 0; i < n; i++, fdtp++) { 1887 fd->ft = fdtp; 1888 1889 id.cyl = id.head = 0; 1890 rv = fdmisccmd(dev, BIO_RDSECTID, &id); 1891 if (rv != 0) 1892 continue; 1893 if (id.cyl != 0 || id.head != 0 || 1894 id.secshift != fdtp->secsize) 1895 continue; 1896 id.cyl = 2; 1897 id.head = fd->ft->heads - 1; 1898 rv = fdmisccmd(dev, BIO_RDSECTID, &id); 1899 if (id.cyl != 2 || id.head != fdtp->heads - 1 || 1900 id.secshift != fdtp->secsize) 1901 continue; 1902 if (rv == 0) 1903 break; 1904 } 1905 1906 fd->options = oopts; 1907 if (i == n) { 1908 device_printf(fd->dev, "autoselection failed\n"); 1909 fd->ft = 0; 1910 return (EIO); 1911 } else { 1912 device_printf(fd->dev, "autoselected %d KB medium\n", 1913 fd->ft->size / 2); 1914 return (0); 1915 } 1916 } 1917 1918 1919 /* 1920 * The controller state machine. 1921 * 1922 * If it returns a non zero value, it should be called again immediately. 1923 */ 1924 static int 1925 fdstate(fdc_p fdc) 1926 { 1927 struct fdc_readid *idp; 1928 int read, format, rdsectid, cylinder, head, i, sec = 0, sectrac; 1929 int st0, cyl, st3, idf, ne7cmd, mfm, steptrac; 1930 unsigned long blknum; 1931 fdu_t fdu = fdc->fdu; 1932 fd_p fd; 1933 register struct bio *bp; 1934 struct fd_formb *finfo = NULL; 1935 size_t fdblk; 1936 1937 bp = fdc->bp; 1938 if (bp == NULL) { 1939 bp = bioq_first(&fdc->head); 1940 if (bp != NULL) { 1941 bioq_remove(&fdc->head, bp); 1942 fdc->bp = bp; 1943 } 1944 } 1945 if (bp == NULL) { 1946 /* 1947 * Nothing left for this controller to do, 1948 * force into the IDLE state. 1949 */ 1950 fdc->state = DEVIDLE; 1951 if (fdc->fd) { 1952 device_printf(fdc->fdc_dev, 1953 "unexpected valid fd pointer\n"); 1954 fdc->fd = (fd_p) 0; 1955 fdc->fdu = -1; 1956 } 1957 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1958 return (0); 1959 } 1960 fdu = FDUNIT(minor(bp->bio_dev)); 1961 fd = devclass_get_softc(fd_devclass, fdu); 1962 fdblk = 128 << fd->ft->secsize; 1963 if (fdc->fd && (fd != fdc->fd)) 1964 device_printf(fd->dev, "confused fd pointers\n"); 1965 read = bp->bio_cmd == BIO_READ; 1966 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0; 1967 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1; 1968 if (read) 1969 idf = ISADMA_READ; 1970 else 1971 idf = ISADMA_WRITE; 1972 format = bp->bio_cmd == BIO_FORMAT; 1973 rdsectid = bp->bio_cmd == BIO_RDSECTID; 1974 if (format) 1975 finfo = (struct fd_formb *)bp->bio_data; 1976 TRACE1("fd%d", fdu); 1977 TRACE1("[%s]", fdstates[fdc->state]); 1978 TRACE1("(0x%x)", fd->flags); 1979 untimeout(fd_turnoff, fd, fd->toffhandle); 1980 fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz); 1981 switch (fdc->state) 1982 { 1983 case DEVIDLE: 1984 case FINDWORK: /* we have found new work */ 1985 fdc->retry = 0; 1986 fd->skip = 0; 1987 fdc->fd = fd; 1988 fdc->fdu = fdu; 1989 fdc->fdctl_wr(fdc, fd->ft->trans); 1990 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 1991 /* 1992 * If the next drive has a motor startup pending, then 1993 * it will start up in its own good time. 1994 */ 1995 if(fd->flags & FD_MOTOR_WAIT) { 1996 fdc->state = MOTORWAIT; 1997 return (0); /* will return later */ 1998 } 1999 /* 2000 * Maybe if it's not starting, it SHOULD be starting. 2001 */ 2002 if (!(fd->flags & FD_MOTOR)) 2003 { 2004 fdc->state = MOTORWAIT; 2005 fd_turnon(fd); 2006 return (0); /* will return later */ 2007 } 2008 else /* at least make sure we are selected */ 2009 { 2010 set_motor(fdc, fd->fdsu, TURNON); 2011 } 2012 if (fdc->flags & FDC_NEEDS_RESET) { 2013 fdc->state = RESETCTLR; 2014 fdc->flags &= ~FDC_NEEDS_RESET; 2015 } else 2016 fdc->state = DOSEEK; 2017 return (1); /* will return immediately */ 2018 2019 case DOSEEK: 2020 blknum = bp->bio_pblkno + fd->skip / fdblk; 2021 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 2022 if (cylinder == fd->track) 2023 { 2024 fdc->state = SEEKCOMPLETE; 2025 return (1); /* will return immediately */ 2026 } 2027 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 2028 fd->fdsu, cylinder * steptrac, 0)) 2029 { 2030 /* 2031 * Seek command not accepted, looks like 2032 * the FDC went off to the Saints... 2033 */ 2034 fdc->retry = 6; /* try a reset */ 2035 return(retrier(fdc)); 2036 } 2037 fd->track = FD_NO_TRACK; 2038 fdc->state = SEEKWAIT; 2039 return(0); /* will return later */ 2040 2041 case SEEKWAIT: 2042 /* allow heads to settle */ 2043 timeout(fd_pseudointr, fdc, hz / 16); 2044 fdc->state = SEEKCOMPLETE; 2045 return(0); /* will return later */ 2046 2047 case SEEKCOMPLETE : /* seek done, start DMA */ 2048 blknum = bp->bio_pblkno + fd->skip / fdblk; 2049 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 2050 2051 /* Make sure seek really happened. */ 2052 if(fd->track == FD_NO_TRACK) { 2053 int descyl = cylinder * steptrac; 2054 do { 2055 /* 2056 * This might be a "ready changed" interrupt, 2057 * which cannot really happen since the 2058 * RDY pin is hardwired to + 5 volts. This 2059 * generally indicates a "bouncing" intr 2060 * line, so do one of the following: 2061 * 2062 * When running on an enhanced FDC that is 2063 * known to not go stuck after responding 2064 * with INVALID, fetch all interrupt states 2065 * until seeing either an INVALID or a 2066 * real interrupt condition. 2067 * 2068 * When running on a dumb old NE765, give 2069 * up immediately. The controller will 2070 * provide up to four dummy RC interrupt 2071 * conditions right after reset (for the 2072 * corresponding four drives), so this is 2073 * our only chance to get notice that it 2074 * was not the FDC that caused the interrupt. 2075 */ 2076 if (fd_sense_int(fdc, &st0, &cyl) 2077 == FD_NOT_VALID) 2078 return (0); /* will return later */ 2079 if(fdc->fdct == FDC_NE765 2080 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2081 return (0); /* hope for a real intr */ 2082 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2083 2084 if (0 == descyl) { 2085 int failed = 0; 2086 /* 2087 * seek to cyl 0 requested; make sure we are 2088 * really there 2089 */ 2090 if (fd_sense_drive_status(fdc, &st3)) 2091 failed = 1; 2092 if ((st3 & NE7_ST3_T0) == 0) { 2093 printf( 2094 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 2095 fdu, st3, NE7_ST3BITS); 2096 failed = 1; 2097 } 2098 2099 if (failed) { 2100 if(fdc->retry < 3) 2101 fdc->retry = 3; 2102 return (retrier(fdc)); 2103 } 2104 } 2105 2106 if (cyl != descyl) { 2107 printf( 2108 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 2109 fdu, descyl, cyl, st0); 2110 if (fdc->retry < 3) 2111 fdc->retry = 3; 2112 return (retrier(fdc)); 2113 } 2114 } 2115 2116 fd->track = cylinder; 2117 if (format) 2118 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 2119 - (char *)finfo; 2120 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2121 isa_dmastart(idf, bp->bio_data+fd->skip, 2122 format ? bp->bio_bcount : fdblk, fdc->dmachan); 2123 blknum = bp->bio_pblkno + fd->skip / fdblk; 2124 sectrac = fd->ft->sectrac; 2125 sec = blknum % (sectrac * fd->ft->heads); 2126 head = sec / sectrac; 2127 sec = sec % sectrac + 1; 2128 if (head != 0 && fd->ft->offset_side2 != 0) 2129 sec += fd->ft->offset_side2; 2130 fd->hddrv = ((head&1)<<2)+fdu; 2131 2132 if(format || !(read || rdsectid)) 2133 { 2134 /* make sure the drive is writable */ 2135 if(fd_sense_drive_status(fdc, &st3) != 0) 2136 { 2137 /* stuck controller? */ 2138 if (!(fdc->flags & FDC_NODMA)) 2139 isa_dmadone(idf, 2140 bp->bio_data + fd->skip, 2141 format ? bp->bio_bcount : fdblk, 2142 fdc->dmachan); 2143 fdc->retry = 6; /* reset the beast */ 2144 return (retrier(fdc)); 2145 } 2146 if(st3 & NE7_ST3_WP) 2147 { 2148 /* 2149 * XXX YES! this is ugly. 2150 * in order to force the current operation 2151 * to fail, we will have to fake an FDC 2152 * error - all error handling is done 2153 * by the retrier() 2154 */ 2155 fdc->status[0] = NE7_ST0_IC_AT; 2156 fdc->status[1] = NE7_ST1_NW; 2157 fdc->status[2] = 0; 2158 fdc->status[3] = fd->track; 2159 fdc->status[4] = head; 2160 fdc->status[5] = sec; 2161 fdc->retry = 8; /* break out immediately */ 2162 fdc->state = IOTIMEDOUT; /* not really... */ 2163 return (1); /* will return immediately */ 2164 } 2165 } 2166 2167 if (format) { 2168 ne7cmd = NE7CMD_FORMAT | mfm; 2169 if (fdc->flags & FDC_NODMA) { 2170 /* 2171 * This seems to be necessary for 2172 * whatever obscure reason; if we omit 2173 * it, we end up filling the sector ID 2174 * fields of the newly formatted track 2175 * entirely with garbage, causing 2176 * `wrong cylinder' errors all over 2177 * the place when trying to read them 2178 * back. 2179 * 2180 * Umpf. 2181 */ 2182 SET_BCDR(fdc, 1, bp->bio_bcount, 0); 2183 2184 (void)fdcpio(fdc,bp->bio_cmd, 2185 bp->bio_data+fd->skip, 2186 bp->bio_bcount); 2187 2188 } 2189 /* formatting */ 2190 if(fd_cmd(fdc, 6, ne7cmd, head << 2 | fdu, 2191 finfo->fd_formb_secshift, 2192 finfo->fd_formb_nsecs, 2193 finfo->fd_formb_gaplen, 2194 finfo->fd_formb_fillbyte, 0)) { 2195 /* controller fell over */ 2196 if (!(fdc->flags & FDC_NODMA)) 2197 isa_dmadone(idf, 2198 bp->bio_data + fd->skip, 2199 format ? bp->bio_bcount : fdblk, 2200 fdc->dmachan); 2201 fdc->retry = 6; 2202 return (retrier(fdc)); 2203 } 2204 } else if (rdsectid) { 2205 ne7cmd = NE7CMD_READID | mfm; 2206 if (fd_cmd(fdc, 2, ne7cmd, head << 2 | fdu, 0)) { 2207 /* controller jamming */ 2208 fdc->retry = 6; 2209 return (retrier(fdc)); 2210 } 2211 } else { 2212 /* read or write operation */ 2213 ne7cmd = (read ? NE7CMD_READ | NE7CMD_SK : NE7CMD_WRITE) | mfm; 2214 if (fdc->flags & FDC_NODMA) { 2215 /* 2216 * This seems to be necessary even when 2217 * reading data. 2218 */ 2219 SET_BCDR(fdc, 1, fdblk, 0); 2220 2221 /* 2222 * Perform the write pseudo-DMA before 2223 * the WRITE command is sent. 2224 */ 2225 if (!read) 2226 (void)fdcpio(fdc,bp->bio_cmd, 2227 bp->bio_data+fd->skip, 2228 fdblk); 2229 } 2230 if (fd_cmd(fdc, 9, 2231 ne7cmd, 2232 head << 2 | fdu, /* head & unit */ 2233 fd->track, /* track */ 2234 head, 2235 sec, /* sector + 1 */ 2236 fd->ft->secsize, /* sector size */ 2237 sectrac, /* sectors/track */ 2238 fd->ft->gap, /* gap size */ 2239 fd->ft->datalen, /* data length */ 2240 0)) { 2241 /* the beast is sleeping again */ 2242 if (!(fdc->flags & FDC_NODMA)) 2243 isa_dmadone(idf, 2244 bp->bio_data + fd->skip, 2245 format ? bp->bio_bcount : fdblk, 2246 fdc->dmachan); 2247 fdc->retry = 6; 2248 return (retrier(fdc)); 2249 } 2250 } 2251 if (!rdsectid && (fdc->flags & FDC_NODMA)) 2252 /* 2253 * If this is a read, then simply await interrupt 2254 * before performing PIO. 2255 */ 2256 if (read && !fdcpio(fdc,bp->bio_cmd, 2257 bp->bio_data+fd->skip,fdblk)) { 2258 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2259 return(0); /* will return later */ 2260 } 2261 2262 /* 2263 * Write (or format) operation will fall through and 2264 * await completion interrupt. 2265 */ 2266 fdc->state = IOCOMPLETE; 2267 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2268 return (0); /* will return later */ 2269 2270 case PIOREAD: 2271 /* 2272 * Actually perform the PIO read. The IOCOMPLETE case 2273 * removes the timeout for us. 2274 */ 2275 (void)fdcpio(fdc,bp->bio_cmd,bp->bio_data+fd->skip,fdblk); 2276 fdc->state = IOCOMPLETE; 2277 /* FALLTHROUGH */ 2278 case IOCOMPLETE: /* IO done, post-analyze */ 2279 untimeout(fd_iotimeout, fdc, fd->tohandle); 2280 2281 if (fd_read_status(fdc)) { 2282 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2283 isa_dmadone(idf, bp->bio_data + fd->skip, 2284 format ? bp->bio_bcount : fdblk, 2285 fdc->dmachan); 2286 if (fdc->retry < 6) 2287 fdc->retry = 6; /* force a reset */ 2288 return (retrier(fdc)); 2289 } 2290 2291 fdc->state = IOTIMEDOUT; 2292 2293 /* FALLTHROUGH */ 2294 case IOTIMEDOUT: 2295 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2296 isa_dmadone(idf, bp->bio_data + fd->skip, 2297 format ? bp->bio_bcount : fdblk, fdc->dmachan); 2298 if (fdc->status[0] & NE7_ST0_IC) { 2299 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2300 && fdc->status[1] & NE7_ST1_OR) { 2301 /* 2302 * DMA overrun. Someone hogged the bus and 2303 * didn't release it in time for the next 2304 * FDC transfer. 2305 * 2306 * We normally restart this without bumping 2307 * the retry counter. However, in case 2308 * something is seriously messed up (like 2309 * broken hardware), we rather limit the 2310 * number of retries so the IO operation 2311 * doesn't block indefinately. 2312 */ 2313 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 2314 fdc->state = SEEKCOMPLETE; 2315 return (1);/* will return immediately */ 2316 } /* else fall through */ 2317 } 2318 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 2319 && fdc->retry < 6) 2320 fdc->retry = 6; /* force a reset */ 2321 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2322 && fdc->status[2] & NE7_ST2_WC 2323 && fdc->retry < 3) 2324 fdc->retry = 3; /* force recalibrate */ 2325 return (retrier(fdc)); 2326 } 2327 /* All OK */ 2328 if (rdsectid) { 2329 /* copy out ID field contents */ 2330 idp = (struct fdc_readid *)bp->bio_data; 2331 idp->cyl = fdc->status[3]; 2332 idp->head = fdc->status[4]; 2333 idp->sec = fdc->status[5]; 2334 idp->secshift = fdc->status[6]; 2335 } 2336 /* Operation successful, retry DMA overruns again next time. */ 2337 fdc->dma_overruns = 0; 2338 fd->skip += fdblk; 2339 if (!rdsectid && !format && fd->skip < bp->bio_bcount) { 2340 /* set up next transfer */ 2341 fdc->state = DOSEEK; 2342 } else { 2343 /* ALL DONE */ 2344 fd->skip = 0; 2345 bp->bio_resid = 0; 2346 fdc->bp = NULL; 2347 device_unbusy(fd->dev); 2348 biofinish(bp, &fd->device_stats, 0); 2349 fdc->fd = (fd_p) 0; 2350 fdc->fdu = -1; 2351 fdc->state = FINDWORK; 2352 } 2353 return (1); /* will return immediately */ 2354 2355 case RESETCTLR: 2356 fdc_reset(fdc); 2357 fdc->retry++; 2358 fdc->state = RESETCOMPLETE; 2359 return (0); /* will return later */ 2360 2361 case RESETCOMPLETE: 2362 /* 2363 * Discard all the results from the reset so that they 2364 * can't cause an unexpected interrupt later. 2365 */ 2366 for (i = 0; i < 4; i++) 2367 (void)fd_sense_int(fdc, &st0, &cyl); 2368 fdc->state = STARTRECAL; 2369 /* FALLTHROUGH */ 2370 case STARTRECAL: 2371 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 2372 /* arrgl */ 2373 fdc->retry = 6; 2374 return (retrier(fdc)); 2375 } 2376 fdc->state = RECALWAIT; 2377 return (0); /* will return later */ 2378 2379 case RECALWAIT: 2380 /* allow heads to settle */ 2381 timeout(fd_pseudointr, fdc, hz / 8); 2382 fdc->state = RECALCOMPLETE; 2383 return (0); /* will return later */ 2384 2385 case RECALCOMPLETE: 2386 do { 2387 /* 2388 * See SEEKCOMPLETE for a comment on this: 2389 */ 2390 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2391 return (0); /* will return later */ 2392 if(fdc->fdct == FDC_NE765 2393 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2394 return (0); /* hope for a real intr */ 2395 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2396 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2397 { 2398 if(fdc->retry > 3) 2399 /* 2400 * A recalibrate from beyond cylinder 77 2401 * will "fail" due to the FDC limitations; 2402 * since people used to complain much about 2403 * the failure message, try not logging 2404 * this one if it seems to be the first 2405 * time in a line. 2406 */ 2407 printf("fd%d: recal failed ST0 %b cyl %d\n", 2408 fdu, st0, NE7_ST0BITS, cyl); 2409 if(fdc->retry < 3) fdc->retry = 3; 2410 return (retrier(fdc)); 2411 } 2412 fd->track = 0; 2413 /* Seek (probably) necessary */ 2414 fdc->state = DOSEEK; 2415 return (1); /* will return immediately */ 2416 2417 case MOTORWAIT: 2418 if(fd->flags & FD_MOTOR_WAIT) 2419 { 2420 return (0); /* time's not up yet */ 2421 } 2422 if (fdc->flags & FDC_NEEDS_RESET) { 2423 fdc->state = RESETCTLR; 2424 fdc->flags &= ~FDC_NEEDS_RESET; 2425 } else 2426 fdc->state = DOSEEK; 2427 return (1); /* will return immediately */ 2428 2429 default: 2430 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2431 if (fd_read_status(fdc) == 0) 2432 printf("FDC status :%x %x %x %x %x %x %x ", 2433 fdc->status[0], 2434 fdc->status[1], 2435 fdc->status[2], 2436 fdc->status[3], 2437 fdc->status[4], 2438 fdc->status[5], 2439 fdc->status[6] ); 2440 else 2441 printf("No status available "); 2442 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2443 { 2444 printf("[controller is dead now]\n"); 2445 return (0); /* will return later */ 2446 } 2447 printf("ST0 = %x, PCN = %x\n", st0, cyl); 2448 return (0); /* will return later */ 2449 } 2450 /* noone should ever get here */ 2451 } 2452 2453 static int 2454 retrier(struct fdc_data *fdc) 2455 { 2456 struct bio *bp; 2457 struct fd_data *fd; 2458 int fdu; 2459 2460 bp = fdc->bp; 2461 2462 /* XXX shouldn't this be cached somewhere? */ 2463 fdu = FDUNIT(minor(bp->bio_dev)); 2464 fd = devclass_get_softc(fd_devclass, fdu); 2465 if (fd->options & FDOPT_NORETRY) 2466 goto fail; 2467 2468 switch (fdc->retry) { 2469 case 0: case 1: case 2: 2470 fdc->state = SEEKCOMPLETE; 2471 break; 2472 case 3: case 4: case 5: 2473 fdc->state = STARTRECAL; 2474 break; 2475 case 6: 2476 fdc->state = RESETCTLR; 2477 break; 2478 case 7: 2479 break; 2480 default: 2481 fail: 2482 if ((fd->options & FDOPT_NOERRLOG) == 0) { 2483 diskerr(bp, "hard error", fdc->fd->skip / DEV_BSIZE, 2484 (struct disklabel *)NULL); 2485 if (fdc->flags & FDC_STAT_VALID) { 2486 printf( 2487 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2488 fdc->status[0], NE7_ST0BITS, 2489 fdc->status[1], NE7_ST1BITS, 2490 fdc->status[2], NE7_ST2BITS, 2491 fdc->status[3], fdc->status[4], 2492 fdc->status[5]); 2493 } 2494 else 2495 printf(" (No status)\n"); 2496 } 2497 if ((fd->options & FDOPT_NOERROR) == 0) { 2498 bp->bio_flags |= BIO_ERROR; 2499 bp->bio_error = EIO; 2500 bp->bio_resid = bp->bio_bcount - fdc->fd->skip; 2501 } else 2502 bp->bio_resid = 0; 2503 fdc->bp = NULL; 2504 fdc->fd->skip = 0; 2505 device_unbusy(fd->dev); 2506 biofinish(bp, &fdc->fd->device_stats, 0); 2507 fdc->state = FINDWORK; 2508 fdc->flags |= FDC_NEEDS_RESET; 2509 fdc->fd = (fd_p) 0; 2510 fdc->fdu = -1; 2511 return (1); 2512 } 2513 fdc->retry++; 2514 return (1); 2515 } 2516 2517 static void 2518 fdbiodone(struct bio *bp) 2519 { 2520 wakeup(bp); 2521 } 2522 2523 static int 2524 fdmisccmd(dev_t dev, u_int cmd, void *data) 2525 { 2526 fdu_t fdu; 2527 fd_p fd; 2528 struct bio *bp; 2529 struct fd_formb *finfo; 2530 struct fdc_readid *idfield; 2531 size_t fdblk; 2532 2533 fdu = FDUNIT(minor(dev)); 2534 fd = devclass_get_softc(fd_devclass, fdu); 2535 fdblk = 128 << fd->ft->secsize; 2536 finfo = (struct fd_formb *)data; 2537 idfield = (struct fdc_readid *)data; 2538 2539 bp = malloc(sizeof(struct bio), M_TEMP, M_ZERO); 2540 2541 /* 2542 * Set up a bio request for fdstrategy(). bio_blkno is faked 2543 * so that fdstrategy() will seek to the the requested 2544 * cylinder, and use the desired head. Since we are not 2545 * interested in bioqdisksort() munging with our faked bio 2546 * request, we mark it as being an ordered request. 2547 */ 2548 bp->bio_cmd = cmd; 2549 if (cmd == BIO_FORMAT) { 2550 bp->bio_blkno = 2551 (finfo->cyl * (fd->ft->sectrac * fd->ft->heads) + 2552 finfo->head * fd->ft->sectrac) * 2553 fdblk / DEV_BSIZE; 2554 bp->bio_bcount = sizeof(struct fd_idfield_data) * 2555 finfo->fd_formb_nsecs; 2556 } else if (cmd == BIO_RDSECTID) { 2557 bp->bio_blkno = 2558 (idfield->cyl * (fd->ft->sectrac * fd->ft->heads) + 2559 idfield->head * fd->ft->sectrac) * 2560 fdblk / DEV_BSIZE; 2561 bp->bio_bcount = sizeof(struct fdc_readid); 2562 } else 2563 panic("wrong cmd in fdmisccmd()"); 2564 bp->bio_data = data; 2565 bp->bio_dev = dev; 2566 bp->bio_done = fdbiodone; 2567 bp->bio_flags = BIO_ORDERED; 2568 2569 /* 2570 * Now run the command. The wait loop is a version of bufwait() 2571 * adapted for struct bio instead of struct buf and specialized 2572 * for the current context. 2573 */ 2574 fdstrategy(bp); 2575 while ((bp->bio_flags & BIO_DONE) == 0) 2576 tsleep(bp, PRIBIO, "fdcmd", 0); 2577 2578 free(bp, M_TEMP); 2579 return (bp->bio_flags & BIO_ERROR ? bp->bio_error : 0); 2580 } 2581 2582 static int 2583 fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 2584 { 2585 fdu_t fdu; 2586 fd_p fd; 2587 struct fd_type *fdt; 2588 struct disklabel *lp; 2589 struct fdc_status *fsp; 2590 struct fdc_readid *rid; 2591 size_t fdblk; 2592 int error, type; 2593 2594 fdu = FDUNIT(minor(dev)); 2595 type = FDTYPE(minor(dev)); 2596 fd = devclass_get_softc(fd_devclass, fdu); 2597 2598 /* 2599 * First, handle everything that could be done with 2600 * FD_NONBLOCK still being set. 2601 */ 2602 switch (cmd) { 2603 case FIONBIO: 2604 if (*(int *)addr != 0) 2605 fd->flags |= FD_NONBLOCK; 2606 else { 2607 if (fd->ft == 0) { 2608 /* 2609 * No drive type has been selected yet, 2610 * cannot turn FNONBLOCK off. 2611 */ 2612 return (EINVAL); 2613 } 2614 fd->flags &= ~FD_NONBLOCK; 2615 } 2616 return (0); 2617 2618 case FIOASYNC: 2619 /* keep the generic fcntl() code happy */ 2620 return (0); 2621 2622 case FD_GTYPE: /* get drive type */ 2623 if (fd->ft == 0) 2624 /* no type known yet, return the native type */ 2625 *(struct fd_type *)addr = fd_native_types[fd->type]; 2626 else 2627 *(struct fd_type *)addr = *fd->ft; 2628 return (0); 2629 2630 case FD_STYPE: /* set drive type */ 2631 if (type == 0) { 2632 /* 2633 * Allow setting drive type temporarily iff 2634 * currently unset. Used for fdformat so any 2635 * user can set it, and then start formatting. 2636 */ 2637 if (fd->ft) 2638 return (EINVAL); /* already set */ 2639 fd->ft = fd->fts; 2640 *fd->ft = *(struct fd_type *)addr; 2641 fd->flags |= FD_UA; 2642 } else { 2643 /* 2644 * Set density definition permanently. Only 2645 * allow for superuser. 2646 */ 2647 if (suser_td(td) != 0) 2648 return (EPERM); 2649 fd->fts[type] = *(struct fd_type *)addr; 2650 } 2651 return (0); 2652 2653 case FD_GOPTS: /* get drive options */ 2654 *(int *)addr = fd->options + (type == 0? FDOPT_AUTOSEL: 0); 2655 return (0); 2656 2657 case FD_SOPTS: /* set drive options */ 2658 fd->options = *(int *)addr & ~FDOPT_AUTOSEL; 2659 return (0); 2660 2661 #ifdef FDC_DEBUG 2662 case FD_DEBUG: 2663 if ((fd_debug != 0) != (*(int *)addr != 0)) { 2664 fd_debug = (*(int *)addr != 0); 2665 printf("fd%d: debugging turned %s\n", 2666 fd->fdu, fd_debug ? "on" : "off"); 2667 } 2668 return (0); 2669 #endif 2670 2671 case FD_CLRERR: 2672 if (suser_td(td) != 0) 2673 return (EPERM); 2674 fd->fdc->fdc_errs = 0; 2675 return (0); 2676 2677 case FD_GSTAT: 2678 fsp = (struct fdc_status *)addr; 2679 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2680 return (EINVAL); 2681 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2682 return (0); 2683 2684 case FD_GDTYPE: 2685 *(enum fd_drivetype *)addr = fd->type; 2686 return (0); 2687 } 2688 2689 /* 2690 * Now handle everything else. Make sure we have a valid 2691 * drive type. 2692 */ 2693 if (fd->flags & FD_NONBLOCK) 2694 return (EAGAIN); 2695 if (fd->ft == 0) 2696 return (ENXIO); 2697 fdblk = 128 << fd->ft->secsize; 2698 error = 0; 2699 2700 switch (cmd) { 2701 case DIOCGDINFO: 2702 lp = malloc(sizeof(*lp), M_TEMP, M_ZERO); 2703 lp->d_secsize = fdblk; 2704 fdt = fd->ft; 2705 lp->d_secpercyl = fdt->size / fdt->tracks; 2706 lp->d_type = DTYPE_FLOPPY; 2707 if (readdisklabel(dkmodpart(dev, RAW_PART), lp) != NULL) 2708 error = EINVAL; 2709 else 2710 *(struct disklabel *)addr = *lp; 2711 free(lp, M_TEMP); 2712 break; 2713 2714 case DIOCSDINFO: 2715 if ((flag & FWRITE) == 0) 2716 return (EBADF); 2717 /* 2718 * XXX perhaps should call setdisklabel() to do error checking 2719 * although there is nowhere to "set" the result. Perhaps 2720 * should always just fail. 2721 */ 2722 break; 2723 2724 case DIOCWLABEL: 2725 if ((flag & FWRITE) == 0) 2726 return (EBADF); 2727 break; 2728 2729 case DIOCWDINFO: 2730 if ((flag & FWRITE) == 0) 2731 return (EBADF); 2732 lp = malloc(DEV_BSIZE, M_TEMP, M_ZERO); 2733 error = setdisklabel(lp, (struct disklabel *)addr, (u_long)0); 2734 if (error != 0) 2735 error = writedisklabel(dev, lp); 2736 free(lp, M_TEMP); 2737 break; 2738 2739 case FD_FORM: 2740 if ((flag & FWRITE) == 0) 2741 return (EBADF); /* must be opened for writing */ 2742 if (((struct fd_formb *)addr)->format_version != 2743 FD_FORMAT_VERSION) 2744 return (EINVAL); /* wrong version of formatting prog */ 2745 error = fdmisccmd(dev, BIO_FORMAT, addr); 2746 break; 2747 2748 case FD_GTYPE: /* get drive type */ 2749 *(struct fd_type *)addr = *fd->ft; 2750 break; 2751 2752 case FD_STYPE: /* set drive type */ 2753 /* this is considered harmful; only allow for superuser */ 2754 if (suser_td(td) != 0) 2755 return (EPERM); 2756 *fd->ft = *(struct fd_type *)addr; 2757 break; 2758 2759 case FD_GOPTS: /* get drive options */ 2760 *(int *)addr = fd->options; 2761 break; 2762 2763 case FD_SOPTS: /* set drive options */ 2764 fd->options = *(int *)addr; 2765 break; 2766 2767 #ifdef FDC_DEBUG 2768 case FD_DEBUG: 2769 if ((fd_debug != 0) != (*(int *)addr != 0)) { 2770 fd_debug = (*(int *)addr != 0); 2771 printf("fd%d: debugging turned %s\n", 2772 fd->fdu, fd_debug ? "on" : "off"); 2773 } 2774 break; 2775 #endif 2776 2777 case FD_CLRERR: 2778 if (suser_td(td) != 0) 2779 return (EPERM); 2780 fd->fdc->fdc_errs = 0; 2781 break; 2782 2783 case FD_GSTAT: 2784 fsp = (struct fdc_status *)addr; 2785 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2786 return (EINVAL); 2787 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2788 break; 2789 2790 case FD_READID: 2791 rid = (struct fdc_readid *)addr; 2792 if (rid->cyl > MAX_CYLINDER || rid->head > MAX_HEAD) 2793 return (EINVAL); 2794 error = fdmisccmd(dev, BIO_RDSECTID, addr); 2795 break; 2796 2797 default: 2798 error = ENOTTY; 2799 break; 2800 } 2801 return (error); 2802 } 2803