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 #define BIO_FORMAT BIO_CMD2 169 170 typedef int fdu_t; 171 typedef int fdcu_t; 172 typedef int fdsu_t; 173 typedef struct fd_data *fd_p; 174 typedef struct fdc_data *fdc_p; 175 typedef enum fdc_type fdc_t; 176 177 #define FDUNIT(s) (((s) >> 6) & 3) 178 #define FDNUMTOUNIT(n) (((n) & 3) << 6) 179 #define FDTYPE(s) ((s) & 0x3f) 180 181 /* 182 * fdc maintains a set (1!) of ivars per child of each controller. 183 */ 184 enum fdc_device_ivars { 185 FDC_IVAR_FDUNIT, 186 }; 187 188 /* 189 * Simple access macros for the ivars. 190 */ 191 #define FDC_ACCESSOR(A, B, T) \ 192 static __inline T fdc_get_ ## A(device_t dev) \ 193 { \ 194 uintptr_t v; \ 195 BUS_READ_IVAR(device_get_parent(dev), dev, FDC_IVAR_ ## B, &v); \ 196 return (T) v; \ 197 } 198 FDC_ACCESSOR(fdunit, FDUNIT, int) 199 200 /* configuration flags for fdc */ 201 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ 202 203 /* error returns for fd_cmd() */ 204 #define FD_FAILED -1 205 #define FD_NOT_VALID -2 206 #define FDC_ERRMAX 100 /* do not log more */ 207 /* 208 * Stop retrying after this many DMA overruns. Since each retry takes 209 * one revolution, with 300 rpm., 25 retries take approximately 5 210 * seconds which the read attempt will block in case the DMA overrun 211 * is persistent. 212 */ 213 #define FDC_DMAOV_MAX 25 214 215 /* 216 * Number of subdevices that can be used for different density types. 217 * By now, the lower 6 bit of the minor number are reserved for this, 218 * allowing for up to 64 subdevices, but we only use 16 out of this. 219 * Density #0 is used for automatic format detection, the other 220 * densities are available as programmable densities (for assignment 221 * by fdcontrol(8)). 222 * The upper 2 bits of the minor number are reserved for the subunit 223 * (drive #) per controller. 224 */ 225 #define NUMDENS 16 226 227 #define BIO_RDSECTID BIO_CMD1 228 229 /* 230 * List of native drive densities. Order must match enum fd_drivetype 231 * in <sys/fdcio.h>. Upon attaching the drive, each of the 232 * programmable subdevices is initialized with the native density 233 * definition. 234 */ 235 static struct fd_type fd_native_types[] = 236 { 237 { 0 }, /* FDT_NONE */ 238 { 9,2,0xFF,0x2A,40, 720,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_360K */ 239 { 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* FDT_12M */ 240 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_720K */ 241 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */ 242 #if 0 /* we currently don't handle 2.88 MB */ 243 { 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /*FDT_288M*/ 244 #else 245 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */ 246 #endif 247 }; 248 249 /* 250 * 360 KB 5.25" and 720 KB 3.5" drives don't have automatic density 251 * selection, they just start out with their native density (or lose). 252 * So 1.2 MB 5.25", 1.44 MB 3.5", and 2.88 MB 3.5" drives have their 253 * respective lists of densities to search for. 254 */ 255 static struct fd_type fd_searchlist_12m[] = { 256 { 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* 1.2M */ 257 { 9,2,0xFF,0x23,40, 720,FDC_300KBPS,2,0x50,1,0,FL_MFM|FL_2STEP }, /* 360K */ 258 { 9,2,0xFF,0x20,80,1440,FDC_300KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 259 }; 260 261 static struct fd_type fd_searchlist_144m[] = { 262 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */ 263 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 264 }; 265 266 /* We search for 1.44M first since this is the most common case. */ 267 static struct fd_type fd_searchlist_288m[] = { 268 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */ 269 #if 0 270 { 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /* 2.88M */ 271 #endif 272 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 273 }; 274 275 #define MAX_SEC_SIZE (128 << 3) 276 #define MAX_CYLINDER 85 /* some people really stress their drives 277 * up to cyl 82 */ 278 #define MAX_HEAD 1 279 280 static devclass_t fdc_devclass; 281 282 /* 283 * Per drive structure (softc). 284 */ 285 struct fd_data { 286 struct fdc_data *fdc; /* pointer to controller structure */ 287 int fdsu; /* this units number on this controller */ 288 enum fd_drivetype type; /* drive type */ 289 struct fd_type *ft; /* pointer to current type descriptor */ 290 struct fd_type fts[NUMDENS]; /* type descriptors */ 291 int flags; 292 #define FD_OPEN 0x01 /* it's open */ 293 #define FD_NONBLOCK 0x02 /* O_NONBLOCK set */ 294 #define FD_ACTIVE 0x04 /* it's active */ 295 #define FD_MOTOR 0x08 /* motor should be on */ 296 #define FD_MOTOR_WAIT 0x10 /* motor coming up */ 297 #define FD_UA 0x20 /* force unit attention */ 298 int skip; 299 int hddrv; 300 #define FD_NO_TRACK -2 301 int track; /* where we think the head is */ 302 int options; /* user configurable options, see fdcio.h */ 303 struct callout_handle toffhandle; 304 struct callout_handle tohandle; 305 struct devstat device_stats; 306 eventhandler_tag clonetag; 307 dev_t masterdev; 308 dev_t clonedevs[NUMDENS - 1]; 309 device_t dev; 310 fdu_t fdu; 311 }; 312 313 struct fdc_ivars { 314 int fdunit; 315 }; 316 static devclass_t fd_devclass; 317 318 /* configuration flags for fd */ 319 #define FD_TYPEMASK 0x0f /* drive type, matches enum 320 * fd_drivetype; on i386 machines, if 321 * given as 0, use RTC type for fd0 322 * and fd1 */ 323 #define FD_DTYPE(flags) ((flags) & FD_TYPEMASK) 324 #define FD_NO_CHLINE 0x10 /* drive does not support changeline 325 * aka. unit attention */ 326 #define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just 327 * assume it is there */ 328 329 /* 330 * Throughout this file the following conventions will be used: 331 * 332 * fd is a pointer to the fd_data struct for the drive in question 333 * fdc is a pointer to the fdc_data struct for the controller 334 * fdu is the floppy drive unit number 335 * fdcu is the floppy controller unit number 336 * fdsu is the floppy drive unit number on that controller. (sub-unit) 337 */ 338 339 /* 340 * Function declarations, same (chaotic) order as they appear in the 341 * file. Re-ordering is too late now, it would only obfuscate the 342 * diffs against old and offspring versions (like the PC98 one). 343 * 344 * Anyone adding functions here, please keep this sequence the same 345 * as below -- makes locating a particular function in the body much 346 * easier. 347 */ 348 static void fdout_wr(fdc_p, u_int8_t); 349 static u_int8_t fdsts_rd(fdc_p); 350 static void fddata_wr(fdc_p, u_int8_t); 351 static u_int8_t fddata_rd(fdc_p); 352 static void fdctl_wr_isa(fdc_p, u_int8_t); 353 #if NCARD > 0 354 static void fdctl_wr_pcmcia(fdc_p, u_int8_t); 355 #endif 356 #if 0 357 static u_int8_t fdin_rd(fdc_p); 358 #endif 359 static int fdc_err(struct fdc_data *, const char *); 360 static int fd_cmd(struct fdc_data *, int, ...); 361 static int enable_fifo(fdc_p fdc); 362 static int fd_sense_drive_status(fdc_p, int *); 363 static int fd_sense_int(fdc_p, int *, int *); 364 static int fd_read_status(fdc_p); 365 static int fdc_alloc_resources(struct fdc_data *); 366 static void fdc_release_resources(struct fdc_data *); 367 static int fdc_read_ivar(device_t, device_t, int, uintptr_t *); 368 static int fdc_probe(device_t); 369 #if NCARD > 0 370 static int fdc_pccard_probe(device_t); 371 #endif 372 static int fdc_detach(device_t dev); 373 static void fdc_add_child(device_t, const char *, int); 374 static int fdc_attach(device_t); 375 static int fdc_print_child(device_t, device_t); 376 static void fd_clone (void *, char *, int, dev_t *); 377 static int fd_probe(device_t); 378 static int fd_attach(device_t); 379 static int fd_detach(device_t); 380 static void set_motor(struct fdc_data *, int, int); 381 # define TURNON 1 382 # define TURNOFF 0 383 static timeout_t fd_turnoff; 384 static timeout_t fd_motor_on; 385 static void fd_turnon(struct fd_data *); 386 static void fdc_reset(fdc_p); 387 static int fd_in(struct fdc_data *, int *); 388 static int out_fdc(struct fdc_data *, int); 389 /* 390 * The open function is named Fdopen() to avoid confusion with fdopen() 391 * in fd(4). The difference is now only meaningful for debuggers. 392 */ 393 static d_open_t Fdopen; 394 static d_close_t fdclose; 395 static d_strategy_t fdstrategy; 396 static void fdstart(struct fdc_data *); 397 static timeout_t fd_iotimeout; 398 static timeout_t fd_pseudointr; 399 static driver_intr_t fdc_intr; 400 static int fdcpio(fdc_p, long, caddr_t, u_int); 401 static int fdautoselect(dev_t); 402 static int fdstate(struct fdc_data *); 403 static int retrier(struct fdc_data *); 404 static void fdbiodone(struct bio *); 405 static int fdmisccmd(dev_t, u_int, void *); 406 static d_ioctl_t fdioctl; 407 408 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 409 410 #ifdef FDC_DEBUG 411 /* CAUTION: fd_debug causes huge amounts of logging output */ 412 static int volatile fd_debug = 0; 413 #define TRACE0(arg) do { if (fd_debug) printf(arg); } while (0) 414 #define TRACE1(arg1, arg2) do { if (fd_debug) printf(arg1, arg2); } while (0) 415 #else /* FDC_DEBUG */ 416 #define TRACE0(arg) do { } while (0) 417 #define TRACE1(arg1, arg2) do { } while (0) 418 #endif /* FDC_DEBUG */ 419 420 /* 421 * Bus space handling (access to low-level IO). 422 */ 423 static void 424 fdout_wr(fdc_p fdc, u_int8_t v) 425 { 426 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 427 } 428 429 static u_int8_t 430 fdsts_rd(fdc_p fdc) 431 { 432 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 433 } 434 435 static void 436 fddata_wr(fdc_p fdc, u_int8_t v) 437 { 438 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 439 } 440 441 static u_int8_t 442 fddata_rd(fdc_p fdc) 443 { 444 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 445 } 446 447 static void 448 fdctl_wr_isa(fdc_p fdc, u_int8_t v) 449 { 450 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 451 } 452 453 #if NCARD > 0 454 static void 455 fdctl_wr_pcmcia(fdc_p fdc, u_int8_t v) 456 { 457 bus_space_write_1(fdc->portt, fdc->porth, FDCTL+fdc->port_off, v); 458 } 459 #endif 460 461 static u_int8_t 462 fdin_rd(fdc_p fdc) 463 { 464 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 465 } 466 467 #define CDEV_MAJOR 9 468 static struct cdevsw fd_cdevsw = { 469 /* open */ Fdopen, 470 /* close */ fdclose, 471 /* read */ physread, 472 /* write */ physwrite, 473 /* ioctl */ fdioctl, 474 /* poll */ nopoll, 475 /* mmap */ nommap, 476 /* strategy */ fdstrategy, 477 /* name */ "fd", 478 /* maj */ CDEV_MAJOR, 479 /* dump */ nodump, 480 /* psize */ nopsize, 481 /* flags */ D_DISK, 482 }; 483 484 /* 485 * Auxiliary functions. Well, some only. Others are scattered 486 * throughout the entire file. 487 */ 488 static int 489 fdc_err(struct fdc_data *fdc, const char *s) 490 { 491 fdc->fdc_errs++; 492 if (s) { 493 if (fdc->fdc_errs < FDC_ERRMAX) 494 device_printf(fdc->fdc_dev, "%s", s); 495 else if (fdc->fdc_errs == FDC_ERRMAX) 496 device_printf(fdc->fdc_dev, "too many errors, not " 497 "logging any more\n"); 498 } 499 500 return FD_FAILED; 501 } 502 503 /* 504 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 505 * Unit number, 506 * # of output bytes, output bytes as ints ..., 507 * # of input bytes, input bytes as ints ... 508 */ 509 static int 510 fd_cmd(struct fdc_data *fdc, int n_out, ...) 511 { 512 u_char cmd; 513 int n_in; 514 int n; 515 va_list ap; 516 517 va_start(ap, n_out); 518 cmd = (u_char)(va_arg(ap, int)); 519 va_end(ap); 520 va_start(ap, n_out); 521 for (n = 0; n < n_out; n++) 522 { 523 if (out_fdc(fdc, va_arg(ap, int)) < 0) 524 { 525 char msg[50]; 526 snprintf(msg, sizeof(msg), 527 "cmd %x failed at out byte %d of %d\n", 528 cmd, n + 1, n_out); 529 return fdc_err(fdc, msg); 530 } 531 } 532 n_in = va_arg(ap, int); 533 for (n = 0; n < n_in; n++) 534 { 535 int *ptr = va_arg(ap, int *); 536 if (fd_in(fdc, ptr) < 0) 537 { 538 char msg[50]; 539 snprintf(msg, sizeof(msg), 540 "cmd %02x failed at in byte %d of %d\n", 541 cmd, n + 1, n_in); 542 return fdc_err(fdc, msg); 543 } 544 } 545 546 return 0; 547 } 548 549 static int 550 enable_fifo(fdc_p fdc) 551 { 552 int i, j; 553 554 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 555 556 /* 557 * Cannot use fd_cmd the normal way here, since 558 * this might be an invalid command. Thus we send the 559 * first byte, and check for an early turn of data directon. 560 */ 561 562 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 563 return fdc_err(fdc, "Enable FIFO failed\n"); 564 565 /* If command is invalid, return */ 566 j = 100000; 567 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 568 != NE7_RQM && j-- > 0) 569 if (i == (NE7_DIO | NE7_RQM)) { 570 fdc_reset(fdc); 571 return FD_FAILED; 572 } 573 if (j<0 || 574 fd_cmd(fdc, 3, 575 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 576 fdc_reset(fdc); 577 return fdc_err(fdc, "Enable FIFO failed\n"); 578 } 579 fdc->flags |= FDC_HAS_FIFO; 580 return 0; 581 } 582 if (fd_cmd(fdc, 4, 583 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 584 return fdc_err(fdc, "Re-enable FIFO failed\n"); 585 return 0; 586 } 587 588 static int 589 fd_sense_drive_status(fdc_p fdc, int *st3p) 590 { 591 int st3; 592 593 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 594 { 595 return fdc_err(fdc, "Sense Drive Status failed\n"); 596 } 597 if (st3p) 598 *st3p = st3; 599 600 return 0; 601 } 602 603 static int 604 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 605 { 606 int cyl, st0, ret; 607 608 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 609 if (ret) { 610 (void)fdc_err(fdc, 611 "sense intr err reading stat reg 0\n"); 612 return ret; 613 } 614 615 if (st0p) 616 *st0p = st0; 617 618 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 619 /* 620 * There doesn't seem to have been an interrupt. 621 */ 622 return FD_NOT_VALID; 623 } 624 625 if (fd_in(fdc, &cyl) < 0) { 626 return fdc_err(fdc, "can't get cyl num\n"); 627 } 628 629 if (cylp) 630 *cylp = cyl; 631 632 return 0; 633 } 634 635 636 static int 637 fd_read_status(fdc_p fdc) 638 { 639 int i, ret; 640 641 for (i = ret = 0; i < 7; i++) { 642 /* 643 * XXX types are poorly chosen. Only bytes can be read 644 * from the hardware, but fdc->status[] wants u_ints and 645 * fd_in() gives ints. 646 */ 647 int status; 648 649 ret = fd_in(fdc, &status); 650 fdc->status[i] = status; 651 if (ret != 0) 652 break; 653 } 654 655 if (ret == 0) 656 fdc->flags |= FDC_STAT_VALID; 657 else 658 fdc->flags &= ~FDC_STAT_VALID; 659 660 return ret; 661 } 662 663 static int 664 fdc_alloc_resources(struct fdc_data *fdc) 665 { 666 device_t dev; 667 int ispnp, ispcmcia, nports; 668 669 dev = fdc->fdc_dev; 670 ispnp = (fdc->flags & FDC_ISPNP) != 0; 671 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 672 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 673 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 674 675 /* 676 * On standard ISA, we don't just use an 8 port range 677 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 678 * register at 0x3f6. 679 * 680 * Isn't PC hardware wonderful. 681 * 682 * The Y-E Data PCMCIA FDC doesn't have this problem, it 683 * uses the register with offset 6 for pseudo-DMA, and the 684 * one with offset 7 as control register. 685 */ 686 nports = ispcmcia ? 8 : (ispnp ? 1 : 6); 687 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 688 &fdc->rid_ioport, 0ul, ~0ul, 689 nports, RF_ACTIVE); 690 if (fdc->res_ioport == 0) { 691 device_printf(dev, "cannot reserve I/O port range (%d ports)\n", 692 nports); 693 return ENXIO; 694 } 695 fdc->portt = rman_get_bustag(fdc->res_ioport); 696 fdc->porth = rman_get_bushandle(fdc->res_ioport); 697 698 if (!ispcmcia) { 699 /* 700 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 701 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 702 * by checking the size and adjust the port address 703 * accordingly. 704 */ 705 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 706 fdc->port_off = -2; 707 708 /* 709 * Register the control port range as rid 1 if it 710 * isn't there already. Most PnP BIOSen will have 711 * already done this but non-PnP configurations don't. 712 * 713 * And some (!!) report 0x3f2-0x3f5 and completely 714 * leave out the control register! It seems that some 715 * non-antique controller chips have a different 716 * method of programming the transfer speed which 717 * doesn't require the control register, but it's 718 * mighty bogus as the chip still responds to the 719 * address for the control register. 720 */ 721 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 722 u_long ctlstart; 723 724 /* Find the control port, usually 0x3f7 */ 725 ctlstart = rman_get_start(fdc->res_ioport) + 726 fdc->port_off + 7; 727 728 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); 729 } 730 731 /* 732 * Now (finally!) allocate the control port. 733 */ 734 fdc->rid_ctl = 1; 735 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 736 &fdc->rid_ctl, 737 0ul, ~0ul, 1, RF_ACTIVE); 738 if (fdc->res_ctl == 0) { 739 device_printf(dev, 740 "cannot reserve control I/O port range (control port)\n"); 741 return ENXIO; 742 } 743 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 744 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 745 } 746 747 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 748 &fdc->rid_irq, 0ul, ~0ul, 1, 749 RF_ACTIVE); 750 if (fdc->res_irq == 0) { 751 device_printf(dev, "cannot reserve interrupt line\n"); 752 return ENXIO; 753 } 754 755 if ((fdc->flags & FDC_NODMA) == 0) { 756 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 757 &fdc->rid_drq, 0ul, ~0ul, 1, 758 RF_ACTIVE); 759 if (fdc->res_drq == 0) { 760 device_printf(dev, "cannot reserve DMA request line\n"); 761 return ENXIO; 762 } 763 fdc->dmachan = fdc->res_drq->r_start; 764 } 765 766 return 0; 767 } 768 769 static void 770 fdc_release_resources(struct fdc_data *fdc) 771 { 772 device_t dev; 773 774 dev = fdc->fdc_dev; 775 if (fdc->res_irq != 0) { 776 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 777 fdc->res_irq); 778 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 779 fdc->res_irq); 780 } 781 if (fdc->res_ctl != 0) { 782 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 783 fdc->res_ctl); 784 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 785 fdc->res_ctl); 786 } 787 if (fdc->res_ioport != 0) { 788 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 789 fdc->res_ioport); 790 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 791 fdc->res_ioport); 792 } 793 if (fdc->res_drq != 0) { 794 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 795 fdc->res_drq); 796 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 797 fdc->res_drq); 798 } 799 } 800 801 /* 802 * Configuration/initialization stuff, per controller. 803 */ 804 805 static struct isa_pnp_id fdc_ids[] = { 806 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 807 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 808 {0} 809 }; 810 811 static int 812 fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 813 { 814 struct fdc_ivars *ivars = device_get_ivars(child); 815 816 switch (which) { 817 case FDC_IVAR_FDUNIT: 818 *result = ivars->fdunit; 819 break; 820 default: 821 return ENOENT; 822 } 823 return 0; 824 } 825 826 static int 827 fdc_probe(device_t dev) 828 { 829 int error, ic_type; 830 struct fdc_data *fdc; 831 832 fdc = device_get_softc(dev); 833 bzero(fdc, sizeof *fdc); 834 fdc->fdc_dev = dev; 835 fdc->fdctl_wr = fdctl_wr_isa; 836 837 /* Check pnp ids */ 838 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 839 if (error == ENXIO) 840 return ENXIO; 841 if (error == 0) 842 fdc->flags |= FDC_ISPNP; 843 844 /* Attempt to allocate our resources for the duration of the probe */ 845 error = fdc_alloc_resources(fdc); 846 if (error) 847 goto out; 848 849 /* First - lets reset the floppy controller */ 850 fdout_wr(fdc, 0); 851 DELAY(100); 852 fdout_wr(fdc, FDO_FRST); 853 854 /* see if it can handle a command */ 855 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 856 NE7_SPEC_2(2, 0), 0)) { 857 error = ENXIO; 858 goto out; 859 } 860 861 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 862 ic_type = (u_char)ic_type; 863 switch (ic_type) { 864 case 0x80: 865 device_set_desc(dev, "NEC 765 or clone"); 866 fdc->fdct = FDC_NE765; 867 break; 868 case 0x81: /* not mentioned in any hardware doc */ 869 case 0x90: 870 device_set_desc(dev, 871 "enhanced floppy controller (i82077, NE72065 or clone)"); 872 fdc->fdct = FDC_ENHANCED; 873 break; 874 default: 875 device_set_desc(dev, "generic floppy controller"); 876 fdc->fdct = FDC_UNKNOWN; 877 break; 878 } 879 } 880 881 out: 882 fdc_release_resources(fdc); 883 return (error); 884 } 885 886 #if NCARD > 0 887 888 static int 889 fdc_pccard_probe(device_t dev) 890 { 891 int error; 892 struct fdc_data *fdc; 893 894 fdc = device_get_softc(dev); 895 bzero(fdc, sizeof *fdc); 896 fdc->fdc_dev = dev; 897 fdc->fdctl_wr = fdctl_wr_pcmcia; 898 899 fdc->flags |= FDC_ISPCMCIA | FDC_NODMA; 900 901 /* Attempt to allocate our resources for the duration of the probe */ 902 error = fdc_alloc_resources(fdc); 903 if (error) 904 goto out; 905 906 /* First - lets reset the floppy controller */ 907 fdout_wr(fdc, 0); 908 DELAY(100); 909 fdout_wr(fdc, FDO_FRST); 910 911 /* see if it can handle a command */ 912 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 913 NE7_SPEC_2(2, 0), 0)) { 914 error = ENXIO; 915 goto out; 916 } 917 918 device_set_desc(dev, "Y-E Data PCMCIA floppy"); 919 fdc->fdct = FDC_NE765; 920 921 out: 922 fdc_release_resources(fdc); 923 return (error); 924 } 925 926 #endif /* NCARD > 0 */ 927 928 static int 929 fdc_detach(device_t dev) 930 { 931 struct fdc_data *fdc; 932 int error; 933 934 fdc = device_get_softc(dev); 935 936 /* have our children detached first */ 937 if ((error = bus_generic_detach(dev))) 938 return (error); 939 940 /* reset controller, turn motor off */ 941 fdout_wr(fdc, 0); 942 943 if ((fdc->flags & FDC_NODMA) == 0) 944 isa_dma_release(fdc->dmachan); 945 946 if ((fdc->flags & FDC_ATTACHED) == 0) { 947 device_printf(dev, "already unloaded\n"); 948 return (0); 949 } 950 fdc->flags &= ~FDC_ATTACHED; 951 952 BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq, 953 fdc->fdc_intr); 954 fdc_release_resources(fdc); 955 device_printf(dev, "unload\n"); 956 return (0); 957 } 958 959 /* 960 * Add a child device to the fdc controller. It will then be probed etc. 961 */ 962 static void 963 fdc_add_child(device_t dev, const char *name, int unit) 964 { 965 int disabled, flags; 966 struct fdc_ivars *ivar; 967 device_t child; 968 969 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO); 970 if (ivar == NULL) 971 return; 972 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 973 ivar->fdunit = 0; 974 child = device_add_child(dev, name, unit); 975 if (child == NULL) 976 return; 977 device_set_ivars(child, ivar); 978 if (resource_int_value(name, unit, "flags", &flags) == 0) 979 device_set_flags(child, flags); 980 if (resource_int_value(name, unit, "disabled", &disabled) == 0 981 && disabled != 0) 982 device_disable(child); 983 } 984 985 static int 986 fdc_attach(device_t dev) 987 { 988 struct fdc_data *fdc; 989 const char *name, *dname; 990 int i, error, dunit; 991 992 fdc = device_get_softc(dev); 993 error = fdc_alloc_resources(fdc); 994 if (error) { 995 device_printf(dev, "cannot re-acquire resources\n"); 996 return error; 997 } 998 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 999 INTR_TYPE_BIO | INTR_ENTROPY, fdc_intr, fdc, 1000 &fdc->fdc_intr); 1001 if (error) { 1002 device_printf(dev, "cannot setup interrupt\n"); 1003 return error; 1004 } 1005 fdc->fdcu = device_get_unit(dev); 1006 fdc->flags |= FDC_ATTACHED | FDC_NEEDS_RESET; 1007 1008 if ((fdc->flags & FDC_NODMA) == 0) { 1009 /* 1010 * Acquire the DMA channel forever, the driver will do 1011 * the rest 1012 * XXX should integrate with rman 1013 */ 1014 isa_dma_acquire(fdc->dmachan); 1015 isa_dmainit(fdc->dmachan, MAX_SEC_SIZE); 1016 } 1017 fdc->state = DEVIDLE; 1018 1019 /* reset controller, turn motor off, clear fdout mirror reg */ 1020 fdout_wr(fdc, fdc->fdout = 0); 1021 bioq_init(&fdc->head); 1022 1023 /* 1024 * Probe and attach any children. We should probably detect 1025 * devices from the BIOS unless overridden. 1026 */ 1027 name = device_get_nameunit(dev); 1028 i = 0; 1029 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) 1030 fdc_add_child(dev, dname, dunit); 1031 1032 if ((error = bus_generic_attach(dev)) != 0) 1033 return (error); 1034 1035 return (0); 1036 } 1037 1038 static int 1039 fdc_print_child(device_t me, device_t child) 1040 { 1041 int retval = 0, flags; 1042 1043 retval += bus_print_child_header(me, child); 1044 retval += printf(" on %s drive %d", device_get_nameunit(me), 1045 fdc_get_fdunit(child)); 1046 if ((flags = device_get_flags(me)) != 0) 1047 retval += printf(" flags %#x", flags); 1048 retval += printf("\n"); 1049 1050 return (retval); 1051 } 1052 1053 static device_method_t fdc_methods[] = { 1054 /* Device interface */ 1055 DEVMETHOD(device_probe, fdc_probe), 1056 DEVMETHOD(device_attach, fdc_attach), 1057 DEVMETHOD(device_detach, fdc_detach), 1058 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1059 DEVMETHOD(device_suspend, bus_generic_suspend), 1060 DEVMETHOD(device_resume, bus_generic_resume), 1061 1062 /* Bus interface */ 1063 DEVMETHOD(bus_print_child, fdc_print_child), 1064 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 1065 /* Our children never use any other bus interface methods. */ 1066 1067 { 0, 0 } 1068 }; 1069 1070 static driver_t fdc_driver = { 1071 "fdc", 1072 fdc_methods, 1073 sizeof(struct fdc_data) 1074 }; 1075 1076 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 1077 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, 0, 0); 1078 1079 #if NCARD > 0 1080 1081 static device_method_t fdc_pccard_methods[] = { 1082 /* Device interface */ 1083 DEVMETHOD(device_probe, fdc_pccard_probe), 1084 DEVMETHOD(device_attach, fdc_attach), 1085 DEVMETHOD(device_detach, fdc_detach), 1086 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1087 DEVMETHOD(device_suspend, bus_generic_suspend), 1088 DEVMETHOD(device_resume, bus_generic_resume), 1089 1090 /* Bus interface */ 1091 DEVMETHOD(bus_print_child, fdc_print_child), 1092 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 1093 /* Our children never use any other bus interface methods. */ 1094 1095 { 0, 0 } 1096 }; 1097 1098 static driver_t fdc_pccard_driver = { 1099 "fdc", 1100 fdc_pccard_methods, 1101 sizeof(struct fdc_data) 1102 }; 1103 1104 DRIVER_MODULE(fdc, pccard, fdc_pccard_driver, fdc_devclass, 0, 0); 1105 1106 #endif /* NCARD > 0 */ 1107 1108 /* 1109 * Create a clone device upon request by devfs. 1110 */ 1111 static void 1112 fd_clone(void *arg, char *name, int namelen, dev_t *dev) 1113 { 1114 struct fd_data *fd; 1115 int i, u; 1116 char *n; 1117 size_t l; 1118 1119 fd = (struct fd_data *)arg; 1120 if (*dev != NODEV) 1121 return; 1122 if (dev_stdclone(name, &n, "fd", &u) != 2) 1123 return; 1124 l = strlen(n); 1125 if (l == 1 && *n >= 'a' && *n <= 'h') { 1126 /* 1127 * Trailing letters a through h denote 1128 * pseudo-partitions. We don't support true 1129 * (UFS-style) partitions, so we just implement them 1130 * as symlinks if someone asks us nicely. 1131 */ 1132 *dev = make_dev_alias(fd->masterdev, name); 1133 return; 1134 } 1135 if (l >= 2 && l <= 5 && *n == '.') { 1136 /* 1137 * Trailing numbers, preceded by a dot, denote 1138 * subdevices for different densities. Historically, 1139 * they have been named by density (like fd0.1440), 1140 * but we allow arbitrary numbers between 1 and 4 1141 * digits, so fd0.1 through fd0.15 are possible as 1142 * well. 1143 */ 1144 for (i = 1; i < l; i++) 1145 if (n[i] < '0' || n[i] > '9') 1146 return; 1147 for (i = 0; i < NUMDENS - 1; i++) 1148 if (fd->clonedevs[i] == NODEV) { 1149 *dev = make_dev(&fd_cdevsw, 1150 FDNUMTOUNIT(u) + i + 1, 1151 UID_ROOT, GID_OPERATOR, 0640, 1152 name); 1153 fd->clonedevs[i] = *dev; 1154 return; 1155 } 1156 } 1157 } 1158 1159 /* 1160 * Configuration/initialization, per drive. 1161 */ 1162 static int 1163 fd_probe(device_t dev) 1164 { 1165 int i; 1166 u_int st0, st3; 1167 struct fd_data *fd; 1168 struct fdc_data *fdc; 1169 fdsu_t fdsu; 1170 int flags; 1171 1172 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 1173 fd = device_get_softc(dev); 1174 fdc = device_get_softc(device_get_parent(dev)); 1175 flags = device_get_flags(dev); 1176 1177 bzero(fd, sizeof *fd); 1178 fd->dev = dev; 1179 fd->fdc = fdc; 1180 fd->fdsu = fdsu; 1181 fd->fdu = device_get_unit(dev); 1182 fd->flags = FD_UA; /* make sure fdautoselect() will be called */ 1183 1184 fd->type = FD_DTYPE(flags); 1185 /* 1186 * XXX I think using __i386__ is wrong here since we actually want to probe 1187 * for the machine type, not the CPU type (so non-PC arch's like the PC98 will 1188 * fail the probe). However, for whatever reason, testing for _MACHINE_ARCH 1189 * == i386 breaks the test on FreeBSD/Alpha. 1190 */ 1191 #ifdef __i386__ 1192 if (fd->type == FDT_NONE && (fd->fdu == 0 || fd->fdu == 1)) { 1193 /* Look up what the BIOS thinks we have. */ 1194 if (fd->fdu == 0) { 1195 if ((fdc->flags & FDC_ISPCMCIA)) 1196 /* 1197 * Somewhat special. No need to force the 1198 * user to set device flags, since the Y-E 1199 * Data PCMCIA floppy is always a 1.44 MB 1200 * device. 1201 */ 1202 fd->type = FDT_144M; 1203 else 1204 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4; 1205 } else { 1206 fd->type = rtcin(RTC_FDISKETTE) & 0x0f; 1207 } 1208 if (fd->type == FDT_288M_1) 1209 fd->type = FDT_288M; 1210 } 1211 #endif /* __i386__ */ 1212 /* is there a unit? */ 1213 if (fd->type == FDT_NONE) 1214 return (ENXIO); 1215 1216 /* select it */ 1217 set_motor(fdc, fdsu, TURNON); 1218 fdc_reset(fdc); /* XXX reset, then unreset, etc. */ 1219 DELAY(1000000); /* 1 sec */ 1220 1221 /* XXX This doesn't work before the first set_motor() */ 1222 if ((fdc->flags & FDC_HAS_FIFO) == 0 && 1223 fdc->fdct == FDC_ENHANCED && 1224 (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 && 1225 enable_fifo(fdc) == 0) { 1226 device_printf(device_get_parent(dev), 1227 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 1228 } 1229 1230 if ((flags & FD_NO_PROBE) == 0) { 1231 /* If we're at track 0 first seek inwards. */ 1232 if ((fd_sense_drive_status(fdc, &st3) == 0) && 1233 (st3 & NE7_ST3_T0)) { 1234 /* Seek some steps... */ 1235 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 1236 /* ...wait a moment... */ 1237 DELAY(300000); 1238 /* make ctrlr happy: */ 1239 fd_sense_int(fdc, 0, 0); 1240 } 1241 } 1242 1243 for (i = 0; i < 2; i++) { 1244 /* 1245 * we must recalibrate twice, just in case the 1246 * heads have been beyond cylinder 76, since 1247 * most FDCs still barf when attempting to 1248 * recalibrate more than 77 steps 1249 */ 1250 /* go back to 0: */ 1251 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 1252 /* a second being enough for full stroke seek*/ 1253 DELAY(i == 0 ? 1000000 : 300000); 1254 1255 /* anything responding? */ 1256 if (fd_sense_int(fdc, &st0, 0) == 0 && 1257 (st0 & NE7_ST0_EC) == 0) 1258 break; /* already probed succesfully */ 1259 } 1260 } 1261 } 1262 1263 set_motor(fdc, fdsu, TURNOFF); 1264 1265 if ((flags & FD_NO_PROBE) == 0 && 1266 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */ 1267 return (ENXIO); 1268 1269 switch (fd->type) { 1270 case FDT_12M: 1271 device_set_desc(dev, "1200-KB 5.25\" drive"); 1272 fd->type = FDT_12M; 1273 break; 1274 case FDT_144M: 1275 device_set_desc(dev, "1440-KB 3.5\" drive"); 1276 fd->type = FDT_144M; 1277 break; 1278 case FDT_288M: 1279 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 1280 fd->type = FDT_288M; 1281 break; 1282 case FDT_360K: 1283 device_set_desc(dev, "360-KB 5.25\" drive"); 1284 fd->type = FDT_360K; 1285 break; 1286 case FDT_720K: 1287 device_set_desc(dev, "720-KB 3.5\" drive"); 1288 fd->type = FDT_720K; 1289 break; 1290 default: 1291 return (ENXIO); 1292 } 1293 fd->track = FD_NO_TRACK; 1294 fd->fdc = fdc; 1295 fd->fdsu = fdsu; 1296 fd->options = 0; 1297 callout_handle_init(&fd->toffhandle); 1298 callout_handle_init(&fd->tohandle); 1299 1300 /* initialize densities for subdevices */ 1301 for (i = 0; i < NUMDENS; i++) 1302 memcpy(fd->fts + i, fd_native_types + fd->type, 1303 sizeof(struct fd_type)); 1304 return (0); 1305 } 1306 1307 static int 1308 fd_attach(device_t dev) 1309 { 1310 struct fd_data *fd; 1311 static int cdevsw_add_done; 1312 int i; 1313 1314 if (!cdevsw_add_done) { 1315 cdevsw_add(&fd_cdevsw); /* XXX */ 1316 cdevsw_add_done = 1; 1317 } 1318 fd = device_get_softc(dev); 1319 fd->clonetag = EVENTHANDLER_REGISTER(dev_clone, fd_clone, fd, 1000); 1320 fd->masterdev = make_dev(&fd_cdevsw, fd->fdu << 6, 1321 UID_ROOT, GID_OPERATOR, 0640, "fd%d", fd->fdu); 1322 for (i = 0; i < NUMDENS - 1; i++) 1323 fd->clonedevs[i] = NODEV; 1324 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1325 device_get_unit(dev), 0, DEVSTAT_NO_ORDERED_TAGS, 1326 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1327 DEVSTAT_PRIORITY_FD); 1328 return (0); 1329 } 1330 1331 static int 1332 fd_detach(device_t dev) 1333 { 1334 struct fd_data *fd; 1335 int i; 1336 1337 fd = device_get_softc(dev); 1338 untimeout(fd_turnoff, fd, fd->toffhandle); 1339 devstat_remove_entry(&fd->device_stats); 1340 destroy_dev(fd->masterdev); 1341 for (i = 0; i < NUMDENS - 1; i++) 1342 if (fd->clonedevs[i] != NODEV) 1343 destroy_dev(fd->clonedevs[i]); 1344 cdevsw_remove(&fd_cdevsw); 1345 EVENTHANDLER_DEREGISTER(dev_clone, fd->clonetag); 1346 1347 return (0); 1348 } 1349 1350 static device_method_t fd_methods[] = { 1351 /* Device interface */ 1352 DEVMETHOD(device_probe, fd_probe), 1353 DEVMETHOD(device_attach, fd_attach), 1354 DEVMETHOD(device_detach, fd_detach), 1355 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1356 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1357 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1358 1359 { 0, 0 } 1360 }; 1361 1362 static driver_t fd_driver = { 1363 "fd", 1364 fd_methods, 1365 sizeof(struct fd_data) 1366 }; 1367 1368 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1369 1370 /* 1371 * More auxiliary functions. 1372 */ 1373 /* 1374 * Motor control stuff. 1375 * Remember to not deselect the drive we're working on. 1376 */ 1377 static void 1378 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1379 { 1380 int fdout; 1381 1382 fdout = fdc->fdout; 1383 if (turnon) { 1384 fdout &= ~FDO_FDSEL; 1385 fdout |= (FDO_MOEN0 << fdsu) | FDO_FDMAEN | FDO_FRST | fdsu; 1386 } else 1387 fdout &= ~(FDO_MOEN0 << fdsu); 1388 fdc->fdout = fdout; 1389 fdout_wr(fdc, fdout); 1390 TRACE1("[0x%x->FDOUT]", fdout); 1391 } 1392 1393 static void 1394 fd_turnoff(void *xfd) 1395 { 1396 int s; 1397 fd_p fd = xfd; 1398 1399 TRACE1("[fd%d: turnoff]", fd->fdu); 1400 1401 s = splbio(); 1402 /* 1403 * Don't turn off the motor yet if the drive is active. 1404 * 1405 * If we got here, this could only mean we missed an interrupt. 1406 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1407 * after a controller reset. Just schedule a pseudo-interrupt 1408 * so the state machine gets re-entered. 1409 */ 1410 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1411 fdc_intr(fd->fdc); 1412 splx(s); 1413 return; 1414 } 1415 1416 fd->flags &= ~FD_MOTOR; 1417 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1418 splx(s); 1419 } 1420 1421 static void 1422 fd_motor_on(void *xfd) 1423 { 1424 int s; 1425 fd_p fd = xfd; 1426 1427 s = splbio(); 1428 fd->flags &= ~FD_MOTOR_WAIT; 1429 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1430 { 1431 fdc_intr(fd->fdc); 1432 } 1433 splx(s); 1434 } 1435 1436 static void 1437 fd_turnon(fd_p fd) 1438 { 1439 if(!(fd->flags & FD_MOTOR)) 1440 { 1441 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1442 set_motor(fd->fdc, fd->fdsu, TURNON); 1443 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */ 1444 } 1445 } 1446 1447 static void 1448 fdc_reset(fdc_p fdc) 1449 { 1450 /* Try a reset, keep motor on */ 1451 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1452 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1453 DELAY(100); 1454 /* enable FDC, but defer interrupts a moment */ 1455 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1456 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1457 DELAY(100); 1458 fdout_wr(fdc, fdc->fdout); 1459 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1460 1461 /* XXX after a reset, silently believe the FDC will accept commands */ 1462 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1463 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1464 0); 1465 if (fdc->flags & FDC_HAS_FIFO) 1466 (void) enable_fifo(fdc); 1467 } 1468 1469 /* 1470 * FDC IO functions, take care of the main status register, timeout 1471 * in case the desired status bits are never set. 1472 */ 1473 static int 1474 fd_in(struct fdc_data *fdc, int *ptr) 1475 { 1476 int i, j = 100000; 1477 while ((i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) 1478 != (NE7_DIO|NE7_RQM) && j-- > 0) 1479 if (i == NE7_RQM) 1480 return fdc_err(fdc, "ready for output in input\n"); 1481 if (j <= 0) 1482 return fdc_err(fdc, bootverbose? "input ready timeout\n": 0); 1483 #ifdef FDC_DEBUG 1484 i = fddata_rd(fdc); 1485 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1486 *ptr = i; 1487 return 0; 1488 #else /* !FDC_DEBUG */ 1489 i = fddata_rd(fdc); 1490 if (ptr) 1491 *ptr = i; 1492 return 0; 1493 #endif /* FDC_DEBUG */ 1494 } 1495 1496 int 1497 out_fdc(struct fdc_data *fdc, int x) 1498 { 1499 int i; 1500 1501 /* Check that the direction bit is set */ 1502 i = 100000; 1503 while ((fdsts_rd(fdc) & NE7_DIO) && i-- > 0); 1504 if (i <= 0) return fdc_err(fdc, "direction bit not set\n"); 1505 1506 /* Check that the floppy controller is ready for a command */ 1507 i = 100000; 1508 while ((fdsts_rd(fdc) & NE7_RQM) == 0 && i-- > 0); 1509 if (i <= 0) 1510 return fdc_err(fdc, bootverbose? "output ready timeout\n": 0); 1511 1512 /* Send the command and return */ 1513 fddata_wr(fdc, x); 1514 TRACE1("[0x%x->FDDATA]", x); 1515 return (0); 1516 } 1517 1518 /* 1519 * Block device driver interface functions (interspersed with even more 1520 * auxiliary functions). 1521 */ 1522 int 1523 Fdopen(dev_t dev, int flags, int mode, struct thread *td) 1524 { 1525 fdu_t fdu = FDUNIT(minor(dev)); 1526 int type = FDTYPE(minor(dev)); 1527 fd_p fd; 1528 fdc_p fdc; 1529 int rv, unitattn, dflags; 1530 1531 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1532 return (ENXIO); 1533 fdc = fd->fdc; 1534 if ((fdc == NULL) || (fd->type == FDT_NONE)) 1535 return (ENXIO); 1536 if (type > NUMDENS) 1537 return (ENXIO); 1538 dflags = device_get_flags(fd->dev); 1539 /* 1540 * This is a bit bogus. It's still possible that e. g. a 1541 * descriptor gets inherited to a child, but then it's at 1542 * least for the same subdevice. By checking FD_OPEN here, we 1543 * can ensure that a device isn't attempted to be opened with 1544 * different densities at the same time where the second open 1545 * could clobber the settings from the first one. 1546 */ 1547 if (fd->flags & FD_OPEN) 1548 return (EBUSY); 1549 1550 if (type == 0) { 1551 if (flags & FNONBLOCK) { 1552 /* 1553 * Unfortunately, physio(9) discards its ioflag 1554 * argument, thus preventing us from seeing the 1555 * IO_NDELAY bit. So we need to keep track 1556 * ourselves. 1557 */ 1558 fd->flags |= FD_NONBLOCK; 1559 fd->ft = 0; 1560 } else { 1561 /* 1562 * Figure out a unit attention condition. 1563 * 1564 * If UA has been forced, proceed. 1565 * 1566 * If motor is off, turn it on for a moment 1567 * and select our drive, in order to read the 1568 * UA hardware signal. 1569 * 1570 * If motor is on, and our drive is currently 1571 * selected, just read the hardware bit. 1572 * 1573 * If motor is on, but active for another 1574 * drive on that controller, we are lost. We 1575 * cannot risk to deselect the other drive, so 1576 * we just assume a forced UA condition to be 1577 * on the safe side. 1578 */ 1579 unitattn = 0; 1580 if ((dflags & FD_NO_CHLINE) != 0 || 1581 (fd->flags & FD_UA) != 0) { 1582 unitattn = 1; 1583 fd->flags &= ~FD_UA; 1584 } else if (fdc->fdout & (FDO_MOEN0 | FDO_MOEN1 | 1585 FDO_MOEN2 | FDO_MOEN3)) { 1586 if ((fdc->fdout & FDO_FDSEL) == fd->fdsu) 1587 unitattn = fdin_rd(fdc) & FDI_DCHG; 1588 else 1589 unitattn = 1; 1590 } else { 1591 set_motor(fdc, fd->fdsu, TURNON); 1592 unitattn = fdin_rd(fdc) & FDI_DCHG; 1593 set_motor(fdc, fd->fdsu, TURNOFF); 1594 } 1595 if (unitattn && (rv = fdautoselect(dev)) != 0) 1596 return (rv); 1597 } 1598 } else { 1599 fd->ft = fd->fts + type; 1600 } 1601 fd->flags |= FD_OPEN; 1602 /* 1603 * Clearing the DMA overrun counter at open time is a bit messy. 1604 * Since we're only managing one counter per controller, opening 1605 * the second drive could mess it up. Anyway, if the DMA overrun 1606 * condition is really persistent, it will eventually time out 1607 * still. OTOH, clearing it here will ensure we'll at least start 1608 * trying again after a previous (maybe even long ago) failure. 1609 * Also, this is merely a stop-gap measure only that should not 1610 * happen during normal operation, so we can tolerate it to be a 1611 * bit sloppy about this. 1612 */ 1613 fdc->dma_overruns = 0; 1614 1615 return 0; 1616 } 1617 1618 int 1619 fdclose(dev_t dev, int flags, int mode, struct thread *td) 1620 { 1621 fdu_t fdu = FDUNIT(minor(dev)); 1622 struct fd_data *fd; 1623 1624 fd = devclass_get_softc(fd_devclass, fdu); 1625 fd->flags &= ~(FD_OPEN | FD_NONBLOCK); 1626 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR); 1627 1628 return (0); 1629 } 1630 1631 void 1632 fdstrategy(struct bio *bp) 1633 { 1634 long blknum, nblocks; 1635 int s; 1636 fdu_t fdu; 1637 fdc_p fdc; 1638 fd_p fd; 1639 size_t fdblk; 1640 1641 fdu = FDUNIT(minor(bp->bio_dev)); 1642 fd = devclass_get_softc(fd_devclass, fdu); 1643 if (fd == 0) 1644 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1645 (u_long)major(bp->bio_dev), (u_long)minor(bp->bio_dev)); 1646 fdc = fd->fdc; 1647 if (fd->type == FDT_NONE || fd->ft == 0) { 1648 bp->bio_error = ENXIO; 1649 bp->bio_flags |= BIO_ERROR; 1650 goto bad; 1651 } 1652 fdblk = 128 << (fd->ft->secsize); 1653 if (bp->bio_cmd != BIO_FORMAT && bp->bio_cmd != BIO_RDSECTID) { 1654 if (fd->flags & FD_NONBLOCK) { 1655 bp->bio_error = EAGAIN; 1656 bp->bio_flags |= BIO_ERROR; 1657 goto bad; 1658 } 1659 if (bp->bio_blkno < 0) { 1660 printf( 1661 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n", 1662 fdu, (u_long)bp->bio_blkno, bp->bio_bcount); 1663 bp->bio_error = EINVAL; 1664 bp->bio_flags |= BIO_ERROR; 1665 goto bad; 1666 } 1667 if ((bp->bio_bcount % fdblk) != 0) { 1668 bp->bio_error = EINVAL; 1669 bp->bio_flags |= BIO_ERROR; 1670 goto bad; 1671 } 1672 } 1673 1674 /* 1675 * Set up block calculations. 1676 */ 1677 if (bp->bio_blkno > 20000000) { 1678 /* 1679 * Reject unreasonably high block number, prevent the 1680 * multiplication below from overflowing. 1681 */ 1682 bp->bio_error = EINVAL; 1683 bp->bio_flags |= BIO_ERROR; 1684 goto bad; 1685 } 1686 blknum = bp->bio_blkno * DEV_BSIZE / fdblk; 1687 nblocks = fd->ft->size; 1688 if (blknum + bp->bio_bcount / fdblk > nblocks) { 1689 if (blknum >= nblocks) { 1690 if (bp->bio_cmd == BIO_READ) 1691 bp->bio_resid = bp->bio_bcount; 1692 else { 1693 bp->bio_error = ENOSPC; 1694 bp->bio_flags |= BIO_ERROR; 1695 } 1696 goto bad; /* not always bad, but EOF */ 1697 } 1698 bp->bio_bcount = (nblocks - blknum) * fdblk; 1699 } 1700 bp->bio_pblkno = bp->bio_blkno; 1701 s = splbio(); 1702 bioqdisksort(&fdc->head, bp); 1703 untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */ 1704 devstat_start_transaction(&fd->device_stats); 1705 device_busy(fd->dev); 1706 fdstart(fdc); 1707 splx(s); 1708 return; 1709 1710 bad: 1711 biodone(bp); 1712 } 1713 1714 /* 1715 * fdstart 1716 * 1717 * We have just queued something. If the controller is not busy 1718 * then simulate the case where it has just finished a command 1719 * So that it (the interrupt routine) looks on the queue for more 1720 * work to do and picks up what we just added. 1721 * 1722 * If the controller is already busy, we need do nothing, as it 1723 * will pick up our work when the present work completes. 1724 */ 1725 static void 1726 fdstart(struct fdc_data *fdc) 1727 { 1728 int s; 1729 1730 s = splbio(); 1731 if(fdc->state == DEVIDLE) 1732 { 1733 fdc_intr(fdc); 1734 } 1735 splx(s); 1736 } 1737 1738 static void 1739 fd_iotimeout(void *xfdc) 1740 { 1741 fdc_p fdc; 1742 int s; 1743 1744 fdc = xfdc; 1745 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1746 1747 /* 1748 * Due to IBM's brain-dead design, the FDC has a faked ready 1749 * signal, hardwired to ready == true. Thus, any command 1750 * issued if there's no diskette in the drive will _never_ 1751 * complete, and must be aborted by resetting the FDC. 1752 * Many thanks, Big Blue! 1753 * The FDC must not be reset directly, since that would 1754 * interfere with the state machine. Instead, pretend that 1755 * the command completed but was invalid. The state machine 1756 * will reset the FDC and retry once. 1757 */ 1758 s = splbio(); 1759 fdc->status[0] = NE7_ST0_IC_IV; 1760 fdc->flags &= ~FDC_STAT_VALID; 1761 fdc->state = IOTIMEDOUT; 1762 fdc_intr(fdc); 1763 splx(s); 1764 } 1765 1766 /* Just ensure it has the right spl. */ 1767 static void 1768 fd_pseudointr(void *xfdc) 1769 { 1770 int s; 1771 1772 s = splbio(); 1773 fdc_intr(xfdc); 1774 splx(s); 1775 } 1776 1777 /* 1778 * fdc_intr 1779 * 1780 * Keep calling the state machine until it returns a 0. 1781 * Always called at splbio. 1782 */ 1783 static void 1784 fdc_intr(void *xfdc) 1785 { 1786 fdc_p fdc = xfdc; 1787 while(fdstate(fdc)) 1788 ; 1789 } 1790 1791 /* 1792 * Magic pseudo-DMA initialization for YE FDC. Sets count and 1793 * direction. 1794 */ 1795 #define SET_BCDR(fdc,wr,cnt,port) \ 1796 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1797 ((cnt)-1) & 0xff); \ 1798 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1799 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1800 1801 /* 1802 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy. 1803 */ 1804 static int 1805 fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count) 1806 { 1807 u_char *cptr = (u_char *)addr; 1808 1809 if (flags == BIO_READ) { 1810 if (fdc->state != PIOREAD) { 1811 fdc->state = PIOREAD; 1812 return(0); 1813 } 1814 SET_BCDR(fdc, 0, count, 0); 1815 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1816 FDC_YE_DATAPORT, cptr, count); 1817 } else { 1818 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1819 FDC_YE_DATAPORT, cptr, count); 1820 SET_BCDR(fdc, 0, count, 0); 1821 } 1822 return(1); 1823 } 1824 1825 /* 1826 * Try figuring out the density of the media present in our device. 1827 */ 1828 static int 1829 fdautoselect(dev_t dev) 1830 { 1831 fdu_t fdu; 1832 fd_p fd; 1833 struct fd_type *fdtp; 1834 struct fdc_readid id; 1835 int i, n, oopts, rv; 1836 1837 fdu = FDUNIT(minor(dev)); 1838 fd = devclass_get_softc(fd_devclass, fdu); 1839 1840 switch (fd->type) { 1841 default: 1842 return (ENXIO); 1843 1844 case FDT_360K: 1845 case FDT_720K: 1846 /* no autoselection on those drives */ 1847 fd->ft = fd_native_types + fd->type; 1848 return (0); 1849 1850 case FDT_12M: 1851 fdtp = fd_searchlist_12m; 1852 n = sizeof fd_searchlist_12m / sizeof(struct fd_type); 1853 break; 1854 1855 case FDT_144M: 1856 fdtp = fd_searchlist_144m; 1857 n = sizeof fd_searchlist_144m / sizeof(struct fd_type); 1858 break; 1859 1860 case FDT_288M: 1861 fdtp = fd_searchlist_288m; 1862 n = sizeof fd_searchlist_288m / sizeof(struct fd_type); 1863 break; 1864 } 1865 1866 /* 1867 * Try reading sector ID fields, first at cylinder 0, head 0, 1868 * then at cylinder 2, head N. We don't probe cylinder 1, 1869 * since for 5.25in DD media in a HD drive, there are no data 1870 * to read (2 step pulses per media cylinder required). For 1871 * two-sided media, the second probe always goes to head 1, so 1872 * we can tell them apart from single-sided media. As a 1873 * side-effect this means that single-sided media should be 1874 * mentioned in the search list after two-sided media of an 1875 * otherwise identical density. Media with a different number 1876 * of sectors per track but otherwise identical parameters 1877 * cannot be distinguished at all. 1878 * 1879 * If we successfully read an ID field on both cylinders where 1880 * the recorded values match our expectation, we are done. 1881 * Otherwise, we try the next density entry from the table. 1882 * 1883 * Stepping to cylinder 2 has the side-effect of clearing the 1884 * unit attention bit. 1885 */ 1886 oopts = fd->options; 1887 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY; 1888 for (i = 0; i < n; i++, fdtp++) { 1889 fd->ft = fdtp; 1890 1891 id.cyl = id.head = 0; 1892 rv = fdmisccmd(dev, BIO_RDSECTID, &id); 1893 if (rv != 0) 1894 continue; 1895 if (id.cyl != 0 || id.head != 0 || 1896 id.secshift != fdtp->secsize) 1897 continue; 1898 id.cyl = 2; 1899 id.head = fd->ft->heads - 1; 1900 rv = fdmisccmd(dev, BIO_RDSECTID, &id); 1901 if (id.cyl != 2 || id.head != fdtp->heads - 1 || 1902 id.secshift != fdtp->secsize) 1903 continue; 1904 if (rv == 0) 1905 break; 1906 } 1907 1908 fd->options = oopts; 1909 if (i == n) { 1910 device_printf(fd->dev, "autoselection failed\n"); 1911 fd->ft = 0; 1912 return (EIO); 1913 } else { 1914 device_printf(fd->dev, "autoselected %d KB medium\n", 1915 fd->ft->size / 2); 1916 return (0); 1917 } 1918 } 1919 1920 1921 /* 1922 * The controller state machine. 1923 * 1924 * If it returns a non zero value, it should be called again immediately. 1925 */ 1926 static int 1927 fdstate(fdc_p fdc) 1928 { 1929 struct fdc_readid *idp; 1930 int read, format, rdsectid, cylinder, head, i, sec = 0, sectrac; 1931 int st0, cyl, st3, idf, ne7cmd, mfm, steptrac; 1932 unsigned long blknum; 1933 fdu_t fdu = fdc->fdu; 1934 fd_p fd; 1935 register struct bio *bp; 1936 struct fd_formb *finfo = NULL; 1937 size_t fdblk; 1938 1939 bp = fdc->bp; 1940 if (bp == NULL) { 1941 bp = bioq_first(&fdc->head); 1942 if (bp != NULL) { 1943 bioq_remove(&fdc->head, bp); 1944 fdc->bp = bp; 1945 } 1946 } 1947 if (bp == NULL) { 1948 /* 1949 * Nothing left for this controller to do, 1950 * force into the IDLE state. 1951 */ 1952 fdc->state = DEVIDLE; 1953 if (fdc->fd) { 1954 device_printf(fdc->fdc_dev, 1955 "unexpected valid fd pointer\n"); 1956 fdc->fd = (fd_p) 0; 1957 fdc->fdu = -1; 1958 } 1959 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1960 return (0); 1961 } 1962 fdu = FDUNIT(minor(bp->bio_dev)); 1963 fd = devclass_get_softc(fd_devclass, fdu); 1964 fdblk = 128 << fd->ft->secsize; 1965 if (fdc->fd && (fd != fdc->fd)) 1966 device_printf(fd->dev, "confused fd pointers\n"); 1967 read = bp->bio_cmd == BIO_READ; 1968 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0; 1969 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1; 1970 if (read) 1971 idf = ISADMA_READ; 1972 else 1973 idf = ISADMA_WRITE; 1974 format = bp->bio_cmd == BIO_FORMAT; 1975 rdsectid = bp->bio_cmd == BIO_RDSECTID; 1976 if (format) 1977 finfo = (struct fd_formb *)bp->bio_data; 1978 TRACE1("fd%d", fdu); 1979 TRACE1("[%s]", fdstates[fdc->state]); 1980 TRACE1("(0x%x)", fd->flags); 1981 untimeout(fd_turnoff, fd, fd->toffhandle); 1982 fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz); 1983 switch (fdc->state) 1984 { 1985 case DEVIDLE: 1986 case FINDWORK: /* we have found new work */ 1987 fdc->retry = 0; 1988 fd->skip = 0; 1989 fdc->fd = fd; 1990 fdc->fdu = fdu; 1991 fdc->fdctl_wr(fdc, fd->ft->trans); 1992 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 1993 /* 1994 * If the next drive has a motor startup pending, then 1995 * it will start up in its own good time. 1996 */ 1997 if(fd->flags & FD_MOTOR_WAIT) { 1998 fdc->state = MOTORWAIT; 1999 return (0); /* will return later */ 2000 } 2001 /* 2002 * Maybe if it's not starting, it SHOULD be starting. 2003 */ 2004 if (!(fd->flags & FD_MOTOR)) 2005 { 2006 fdc->state = MOTORWAIT; 2007 fd_turnon(fd); 2008 return (0); /* will return later */ 2009 } 2010 else /* at least make sure we are selected */ 2011 { 2012 set_motor(fdc, fd->fdsu, TURNON); 2013 } 2014 if (fdc->flags & FDC_NEEDS_RESET) { 2015 fdc->state = RESETCTLR; 2016 fdc->flags &= ~FDC_NEEDS_RESET; 2017 } else 2018 fdc->state = DOSEEK; 2019 return (1); /* will return immediately */ 2020 2021 case DOSEEK: 2022 blknum = bp->bio_pblkno + fd->skip / fdblk; 2023 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 2024 if (cylinder == fd->track) 2025 { 2026 fdc->state = SEEKCOMPLETE; 2027 return (1); /* will return immediately */ 2028 } 2029 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 2030 fd->fdsu, cylinder * steptrac, 0)) 2031 { 2032 /* 2033 * Seek command not accepted, looks like 2034 * the FDC went off to the Saints... 2035 */ 2036 fdc->retry = 6; /* try a reset */ 2037 return(retrier(fdc)); 2038 } 2039 fd->track = FD_NO_TRACK; 2040 fdc->state = SEEKWAIT; 2041 return(0); /* will return later */ 2042 2043 case SEEKWAIT: 2044 /* allow heads to settle */ 2045 timeout(fd_pseudointr, fdc, hz / 16); 2046 fdc->state = SEEKCOMPLETE; 2047 return(0); /* will return later */ 2048 2049 case SEEKCOMPLETE : /* seek done, start DMA */ 2050 blknum = bp->bio_pblkno + fd->skip / fdblk; 2051 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 2052 2053 /* Make sure seek really happened. */ 2054 if(fd->track == FD_NO_TRACK) { 2055 int descyl = cylinder * steptrac; 2056 do { 2057 /* 2058 * This might be a "ready changed" interrupt, 2059 * which cannot really happen since the 2060 * RDY pin is hardwired to + 5 volts. This 2061 * generally indicates a "bouncing" intr 2062 * line, so do one of the following: 2063 * 2064 * When running on an enhanced FDC that is 2065 * known to not go stuck after responding 2066 * with INVALID, fetch all interrupt states 2067 * until seeing either an INVALID or a 2068 * real interrupt condition. 2069 * 2070 * When running on a dumb old NE765, give 2071 * up immediately. The controller will 2072 * provide up to four dummy RC interrupt 2073 * conditions right after reset (for the 2074 * corresponding four drives), so this is 2075 * our only chance to get notice that it 2076 * was not the FDC that caused the interrupt. 2077 */ 2078 if (fd_sense_int(fdc, &st0, &cyl) 2079 == FD_NOT_VALID) 2080 return (0); /* will return later */ 2081 if(fdc->fdct == FDC_NE765 2082 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2083 return (0); /* hope for a real intr */ 2084 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2085 2086 if (0 == descyl) { 2087 int failed = 0; 2088 /* 2089 * seek to cyl 0 requested; make sure we are 2090 * really there 2091 */ 2092 if (fd_sense_drive_status(fdc, &st3)) 2093 failed = 1; 2094 if ((st3 & NE7_ST3_T0) == 0) { 2095 printf( 2096 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 2097 fdu, st3, NE7_ST3BITS); 2098 failed = 1; 2099 } 2100 2101 if (failed) { 2102 if(fdc->retry < 3) 2103 fdc->retry = 3; 2104 return (retrier(fdc)); 2105 } 2106 } 2107 2108 if (cyl != descyl) { 2109 printf( 2110 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 2111 fdu, descyl, cyl, st0); 2112 if (fdc->retry < 3) 2113 fdc->retry = 3; 2114 return (retrier(fdc)); 2115 } 2116 } 2117 2118 fd->track = cylinder; 2119 if (format) 2120 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 2121 - (char *)finfo; 2122 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2123 isa_dmastart(idf, bp->bio_data+fd->skip, 2124 format ? bp->bio_bcount : fdblk, fdc->dmachan); 2125 blknum = bp->bio_pblkno + fd->skip / fdblk; 2126 sectrac = fd->ft->sectrac; 2127 sec = blknum % (sectrac * fd->ft->heads); 2128 head = sec / sectrac; 2129 sec = sec % sectrac + 1; 2130 if (head != 0 && fd->ft->offset_side2 != 0) 2131 sec += fd->ft->offset_side2; 2132 fd->hddrv = ((head&1)<<2)+fdu; 2133 2134 if(format || !(read || rdsectid)) 2135 { 2136 /* make sure the drive is writable */ 2137 if(fd_sense_drive_status(fdc, &st3) != 0) 2138 { 2139 /* stuck controller? */ 2140 if (!(fdc->flags & FDC_NODMA)) 2141 isa_dmadone(idf, 2142 bp->bio_data + fd->skip, 2143 format ? bp->bio_bcount : fdblk, 2144 fdc->dmachan); 2145 fdc->retry = 6; /* reset the beast */ 2146 return (retrier(fdc)); 2147 } 2148 if(st3 & NE7_ST3_WP) 2149 { 2150 /* 2151 * XXX YES! this is ugly. 2152 * in order to force the current operation 2153 * to fail, we will have to fake an FDC 2154 * error - all error handling is done 2155 * by the retrier() 2156 */ 2157 fdc->status[0] = NE7_ST0_IC_AT; 2158 fdc->status[1] = NE7_ST1_NW; 2159 fdc->status[2] = 0; 2160 fdc->status[3] = fd->track; 2161 fdc->status[4] = head; 2162 fdc->status[5] = sec; 2163 fdc->retry = 8; /* break out immediately */ 2164 fdc->state = IOTIMEDOUT; /* not really... */ 2165 return (1); /* will return immediately */ 2166 } 2167 } 2168 2169 if (format) { 2170 ne7cmd = NE7CMD_FORMAT | mfm; 2171 if (fdc->flags & FDC_NODMA) { 2172 /* 2173 * This seems to be necessary for 2174 * whatever obscure reason; if we omit 2175 * it, we end up filling the sector ID 2176 * fields of the newly formatted track 2177 * entirely with garbage, causing 2178 * `wrong cylinder' errors all over 2179 * the place when trying to read them 2180 * back. 2181 * 2182 * Umpf. 2183 */ 2184 SET_BCDR(fdc, 1, bp->bio_bcount, 0); 2185 2186 (void)fdcpio(fdc,bp->bio_cmd, 2187 bp->bio_data+fd->skip, 2188 bp->bio_bcount); 2189 2190 } 2191 /* formatting */ 2192 if(fd_cmd(fdc, 6, ne7cmd, head << 2 | fdu, 2193 finfo->fd_formb_secshift, 2194 finfo->fd_formb_nsecs, 2195 finfo->fd_formb_gaplen, 2196 finfo->fd_formb_fillbyte, 0)) { 2197 /* controller fell over */ 2198 if (!(fdc->flags & FDC_NODMA)) 2199 isa_dmadone(idf, 2200 bp->bio_data + fd->skip, 2201 format ? bp->bio_bcount : fdblk, 2202 fdc->dmachan); 2203 fdc->retry = 6; 2204 return (retrier(fdc)); 2205 } 2206 } else if (rdsectid) { 2207 ne7cmd = NE7CMD_READID | mfm; 2208 if (fd_cmd(fdc, 2, ne7cmd, head << 2 | fdu, 0)) { 2209 /* controller jamming */ 2210 fdc->retry = 6; 2211 return (retrier(fdc)); 2212 } 2213 } else { 2214 /* read or write operation */ 2215 ne7cmd = (read ? NE7CMD_READ | NE7CMD_SK : NE7CMD_WRITE) | mfm; 2216 if (fdc->flags & FDC_NODMA) { 2217 /* 2218 * This seems to be necessary even when 2219 * reading data. 2220 */ 2221 SET_BCDR(fdc, 1, fdblk, 0); 2222 2223 /* 2224 * Perform the write pseudo-DMA before 2225 * the WRITE command is sent. 2226 */ 2227 if (!read) 2228 (void)fdcpio(fdc,bp->bio_cmd, 2229 bp->bio_data+fd->skip, 2230 fdblk); 2231 } 2232 if (fd_cmd(fdc, 9, 2233 ne7cmd, 2234 head << 2 | fdu, /* head & unit */ 2235 fd->track, /* track */ 2236 head, 2237 sec, /* sector + 1 */ 2238 fd->ft->secsize, /* sector size */ 2239 sectrac, /* sectors/track */ 2240 fd->ft->gap, /* gap size */ 2241 fd->ft->datalen, /* data length */ 2242 0)) { 2243 /* the beast is sleeping again */ 2244 if (!(fdc->flags & FDC_NODMA)) 2245 isa_dmadone(idf, 2246 bp->bio_data + fd->skip, 2247 format ? bp->bio_bcount : fdblk, 2248 fdc->dmachan); 2249 fdc->retry = 6; 2250 return (retrier(fdc)); 2251 } 2252 } 2253 if (!rdsectid && (fdc->flags & FDC_NODMA)) 2254 /* 2255 * If this is a read, then simply await interrupt 2256 * before performing PIO. 2257 */ 2258 if (read && !fdcpio(fdc,bp->bio_cmd, 2259 bp->bio_data+fd->skip,fdblk)) { 2260 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2261 return(0); /* will return later */ 2262 } 2263 2264 /* 2265 * Write (or format) operation will fall through and 2266 * await completion interrupt. 2267 */ 2268 fdc->state = IOCOMPLETE; 2269 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2270 return (0); /* will return later */ 2271 2272 case PIOREAD: 2273 /* 2274 * Actually perform the PIO read. The IOCOMPLETE case 2275 * removes the timeout for us. 2276 */ 2277 (void)fdcpio(fdc,bp->bio_cmd,bp->bio_data+fd->skip,fdblk); 2278 fdc->state = IOCOMPLETE; 2279 /* FALLTHROUGH */ 2280 case IOCOMPLETE: /* IO done, post-analyze */ 2281 untimeout(fd_iotimeout, fdc, fd->tohandle); 2282 2283 if (fd_read_status(fdc)) { 2284 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2285 isa_dmadone(idf, bp->bio_data + fd->skip, 2286 format ? bp->bio_bcount : fdblk, 2287 fdc->dmachan); 2288 if (fdc->retry < 6) 2289 fdc->retry = 6; /* force a reset */ 2290 return (retrier(fdc)); 2291 } 2292 2293 fdc->state = IOTIMEDOUT; 2294 2295 /* FALLTHROUGH */ 2296 case IOTIMEDOUT: 2297 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2298 isa_dmadone(idf, bp->bio_data + fd->skip, 2299 format ? bp->bio_bcount : fdblk, fdc->dmachan); 2300 if (fdc->status[0] & NE7_ST0_IC) { 2301 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2302 && fdc->status[1] & NE7_ST1_OR) { 2303 /* 2304 * DMA overrun. Someone hogged the bus and 2305 * didn't release it in time for the next 2306 * FDC transfer. 2307 * 2308 * We normally restart this without bumping 2309 * the retry counter. However, in case 2310 * something is seriously messed up (like 2311 * broken hardware), we rather limit the 2312 * number of retries so the IO operation 2313 * doesn't block indefinately. 2314 */ 2315 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 2316 fdc->state = SEEKCOMPLETE; 2317 return (1);/* will return immediately */ 2318 } /* else fall through */ 2319 } 2320 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 2321 && fdc->retry < 6) 2322 fdc->retry = 6; /* force a reset */ 2323 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2324 && fdc->status[2] & NE7_ST2_WC 2325 && fdc->retry < 3) 2326 fdc->retry = 3; /* force recalibrate */ 2327 return (retrier(fdc)); 2328 } 2329 /* All OK */ 2330 if (rdsectid) { 2331 /* copy out ID field contents */ 2332 idp = (struct fdc_readid *)bp->bio_data; 2333 idp->cyl = fdc->status[3]; 2334 idp->head = fdc->status[4]; 2335 idp->sec = fdc->status[5]; 2336 idp->secshift = fdc->status[6]; 2337 } 2338 /* Operation successful, retry DMA overruns again next time. */ 2339 fdc->dma_overruns = 0; 2340 fd->skip += fdblk; 2341 if (!rdsectid && !format && fd->skip < bp->bio_bcount) { 2342 /* set up next transfer */ 2343 fdc->state = DOSEEK; 2344 } else { 2345 /* ALL DONE */ 2346 fd->skip = 0; 2347 bp->bio_resid = 0; 2348 fdc->bp = NULL; 2349 device_unbusy(fd->dev); 2350 biofinish(bp, &fd->device_stats, 0); 2351 fdc->fd = (fd_p) 0; 2352 fdc->fdu = -1; 2353 fdc->state = FINDWORK; 2354 } 2355 return (1); /* will return immediately */ 2356 2357 case RESETCTLR: 2358 fdc_reset(fdc); 2359 fdc->retry++; 2360 fdc->state = RESETCOMPLETE; 2361 return (0); /* will return later */ 2362 2363 case RESETCOMPLETE: 2364 /* 2365 * Discard all the results from the reset so that they 2366 * can't cause an unexpected interrupt later. 2367 */ 2368 for (i = 0; i < 4; i++) 2369 (void)fd_sense_int(fdc, &st0, &cyl); 2370 fdc->state = STARTRECAL; 2371 /* FALLTHROUGH */ 2372 case STARTRECAL: 2373 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 2374 /* arrgl */ 2375 fdc->retry = 6; 2376 return (retrier(fdc)); 2377 } 2378 fdc->state = RECALWAIT; 2379 return (0); /* will return later */ 2380 2381 case RECALWAIT: 2382 /* allow heads to settle */ 2383 timeout(fd_pseudointr, fdc, hz / 8); 2384 fdc->state = RECALCOMPLETE; 2385 return (0); /* will return later */ 2386 2387 case RECALCOMPLETE: 2388 do { 2389 /* 2390 * See SEEKCOMPLETE for a comment on this: 2391 */ 2392 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2393 return (0); /* will return later */ 2394 if(fdc->fdct == FDC_NE765 2395 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2396 return (0); /* hope for a real intr */ 2397 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2398 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2399 { 2400 if(fdc->retry > 3) 2401 /* 2402 * A recalibrate from beyond cylinder 77 2403 * will "fail" due to the FDC limitations; 2404 * since people used to complain much about 2405 * the failure message, try not logging 2406 * this one if it seems to be the first 2407 * time in a line. 2408 */ 2409 printf("fd%d: recal failed ST0 %b cyl %d\n", 2410 fdu, st0, NE7_ST0BITS, cyl); 2411 if(fdc->retry < 3) fdc->retry = 3; 2412 return (retrier(fdc)); 2413 } 2414 fd->track = 0; 2415 /* Seek (probably) necessary */ 2416 fdc->state = DOSEEK; 2417 return (1); /* will return immediately */ 2418 2419 case MOTORWAIT: 2420 if(fd->flags & FD_MOTOR_WAIT) 2421 { 2422 return (0); /* time's not up yet */ 2423 } 2424 if (fdc->flags & FDC_NEEDS_RESET) { 2425 fdc->state = RESETCTLR; 2426 fdc->flags &= ~FDC_NEEDS_RESET; 2427 } else 2428 fdc->state = DOSEEK; 2429 return (1); /* will return immediately */ 2430 2431 default: 2432 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2433 if (fd_read_status(fdc) == 0) 2434 printf("FDC status :%x %x %x %x %x %x %x ", 2435 fdc->status[0], 2436 fdc->status[1], 2437 fdc->status[2], 2438 fdc->status[3], 2439 fdc->status[4], 2440 fdc->status[5], 2441 fdc->status[6] ); 2442 else 2443 printf("No status available "); 2444 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2445 { 2446 printf("[controller is dead now]\n"); 2447 return (0); /* will return later */ 2448 } 2449 printf("ST0 = %x, PCN = %x\n", st0, cyl); 2450 return (0); /* will return later */ 2451 } 2452 /* noone should ever get here */ 2453 } 2454 2455 static int 2456 retrier(struct fdc_data *fdc) 2457 { 2458 struct bio *bp; 2459 struct fd_data *fd; 2460 int fdu; 2461 2462 bp = fdc->bp; 2463 2464 /* XXX shouldn't this be cached somewhere? */ 2465 fdu = FDUNIT(minor(bp->bio_dev)); 2466 fd = devclass_get_softc(fd_devclass, fdu); 2467 if (fd->options & FDOPT_NORETRY) 2468 goto fail; 2469 2470 switch (fdc->retry) { 2471 case 0: case 1: case 2: 2472 fdc->state = SEEKCOMPLETE; 2473 break; 2474 case 3: case 4: case 5: 2475 fdc->state = STARTRECAL; 2476 break; 2477 case 6: 2478 fdc->state = RESETCTLR; 2479 break; 2480 case 7: 2481 break; 2482 default: 2483 fail: 2484 if ((fd->options & FDOPT_NOERRLOG) == 0) { 2485 diskerr(bp, "hard error", fdc->fd->skip / DEV_BSIZE, 2486 (struct disklabel *)NULL); 2487 if (fdc->flags & FDC_STAT_VALID) { 2488 printf( 2489 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2490 fdc->status[0], NE7_ST0BITS, 2491 fdc->status[1], NE7_ST1BITS, 2492 fdc->status[2], NE7_ST2BITS, 2493 fdc->status[3], fdc->status[4], 2494 fdc->status[5]); 2495 } 2496 else 2497 printf(" (No status)\n"); 2498 } 2499 if ((fd->options & FDOPT_NOERROR) == 0) { 2500 bp->bio_flags |= BIO_ERROR; 2501 bp->bio_error = EIO; 2502 bp->bio_resid = bp->bio_bcount - fdc->fd->skip; 2503 } else 2504 bp->bio_resid = 0; 2505 fdc->bp = NULL; 2506 fdc->fd->skip = 0; 2507 device_unbusy(fd->dev); 2508 biofinish(bp, &fdc->fd->device_stats, 0); 2509 fdc->state = FINDWORK; 2510 fdc->flags |= FDC_NEEDS_RESET; 2511 fdc->fd = (fd_p) 0; 2512 fdc->fdu = -1; 2513 return (1); 2514 } 2515 fdc->retry++; 2516 return (1); 2517 } 2518 2519 static void 2520 fdbiodone(struct bio *bp) 2521 { 2522 wakeup(bp); 2523 } 2524 2525 static int 2526 fdmisccmd(dev_t dev, u_int cmd, void *data) 2527 { 2528 fdu_t fdu; 2529 fd_p fd; 2530 struct bio *bp; 2531 struct fd_formb *finfo; 2532 struct fdc_readid *idfield; 2533 size_t fdblk; 2534 2535 fdu = FDUNIT(minor(dev)); 2536 fd = devclass_get_softc(fd_devclass, fdu); 2537 fdblk = 128 << fd->ft->secsize; 2538 finfo = (struct fd_formb *)data; 2539 idfield = (struct fdc_readid *)data; 2540 2541 bp = malloc(sizeof(struct bio), M_TEMP, M_ZERO); 2542 2543 /* 2544 * Set up a bio request for fdstrategy(). bio_blkno is faked 2545 * so that fdstrategy() will seek to the the requested 2546 * cylinder, and use the desired head. 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 = 0; 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) != 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) != 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(dev, 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) != 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) != 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