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 */ 54 55 #include <sys/cdefs.h> 56 __FBSDID("$FreeBSD$"); 57 58 #include "opt_fdc.h" 59 #include "card.h" 60 61 #include <sys/param.h> 62 #include <sys/systm.h> 63 #include <sys/bio.h> 64 #include <sys/bus.h> 65 #include <sys/conf.h> 66 #include <sys/devicestat.h> 67 #include <sys/disk.h> 68 #include <sys/fcntl.h> 69 #include <sys/fdcio.h> 70 #include <sys/filio.h> 71 #include <sys/kernel.h> 72 #include <sys/lock.h> 73 #include <sys/malloc.h> 74 #include <sys/module.h> 75 #include <sys/mutex.h> 76 #include <sys/proc.h> 77 #include <sys/syslog.h> 78 79 #include <machine/bus.h> 80 #include <sys/rman.h> 81 82 #include <machine/clock.h> 83 #include <machine/resource.h> 84 #include <machine/stdarg.h> 85 86 #include <isa/isavar.h> 87 #include <isa/isareg.h> 88 #include <isa/fdreg.h> 89 #include <isa/rtc.h> 90 91 enum fdc_type 92 { 93 FDC_NE765, FDC_ENHANCED, FDC_UNKNOWN = -1 94 }; 95 96 enum fdc_states { 97 DEVIDLE, 98 FINDWORK, 99 DOSEEK, 100 SEEKCOMPLETE , 101 IOCOMPLETE, 102 RECALCOMPLETE, 103 STARTRECAL, 104 RESETCTLR, 105 SEEKWAIT, 106 RECALWAIT, 107 MOTORWAIT, 108 IOTIMEDOUT, 109 RESETCOMPLETE, 110 PIOREAD 111 }; 112 113 #ifdef FDC_DEBUG 114 static char const * const fdstates[] = { 115 "DEVIDLE", 116 "FINDWORK", 117 "DOSEEK", 118 "SEEKCOMPLETE", 119 "IOCOMPLETE", 120 "RECALCOMPLETE", 121 "STARTRECAL", 122 "RESETCTLR", 123 "SEEKWAIT", 124 "RECALWAIT", 125 "MOTORWAIT", 126 "IOTIMEDOUT", 127 "RESETCOMPLETE", 128 "PIOREAD" 129 }; 130 #endif 131 132 /* 133 * Per controller structure (softc). 134 */ 135 struct fdc_data 136 { 137 int fdcu; /* our unit number */ 138 int dmachan; 139 int flags; 140 #define FDC_ATTACHED 0x01 141 #define FDC_STAT_VALID 0x08 142 #define FDC_HAS_FIFO 0x10 143 #define FDC_NEEDS_RESET 0x20 144 #define FDC_NODMA 0x40 145 #define FDC_ISPNP 0x80 146 #define FDC_ISPCMCIA 0x100 147 struct fd_data *fd; 148 int fdu; /* the active drive */ 149 enum fdc_states state; 150 int retry; 151 int fdout; /* mirror of the w/o digital output reg */ 152 u_int status[7]; /* copy of the registers */ 153 enum fdc_type fdct; /* chip version of FDC */ 154 int fdc_errs; /* number of logged errors */ 155 int dma_overruns; /* number of DMA overruns */ 156 struct bio_queue_head head; 157 struct bio *bp; /* active buffer */ 158 struct resource *res_ioport, *res_ctl, *res_irq, *res_drq; 159 int rid_ioport, rid_ctl, rid_irq, rid_drq; 160 int port_off; 161 bus_space_tag_t portt; 162 bus_space_handle_t porth; 163 bus_space_tag_t ctlt; 164 bus_space_handle_t ctlh; 165 void *fdc_intr; 166 struct device *fdc_dev; 167 void (*fdctl_wr)(struct fdc_data *fdc, u_int8_t v); 168 }; 169 170 #define FDBIO_FORMAT BIO_CMD2 171 172 typedef int fdu_t; 173 typedef int fdcu_t; 174 typedef int fdsu_t; 175 typedef struct fd_data *fd_p; 176 typedef struct fdc_data *fdc_p; 177 typedef enum fdc_type fdc_t; 178 179 #define FDUNIT(s) (((s) >> 6) & 3) 180 #define FDNUMTOUNIT(n) (((n) & 3) << 6) 181 #define FDTYPE(s) ((s) & 0x3f) 182 183 /* 184 * fdc maintains a set (1!) of ivars per child of each controller. 185 */ 186 enum fdc_device_ivars { 187 FDC_IVAR_FDUNIT, 188 }; 189 190 /* 191 * Simple access macros for the ivars. 192 */ 193 #define FDC_ACCESSOR(A, B, T) \ 194 static __inline T fdc_get_ ## A(device_t dev) \ 195 { \ 196 uintptr_t v; \ 197 BUS_READ_IVAR(device_get_parent(dev), dev, FDC_IVAR_ ## B, &v); \ 198 return (T) v; \ 199 } 200 FDC_ACCESSOR(fdunit, FDUNIT, int) 201 202 /* configuration flags for fdc */ 203 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ 204 205 /* error returns for fd_cmd() */ 206 #define FD_FAILED -1 207 #define FD_NOT_VALID -2 208 #define FDC_ERRMAX 100 /* do not log more */ 209 /* 210 * Stop retrying after this many DMA overruns. Since each retry takes 211 * one revolution, with 300 rpm., 25 retries take approximately 5 212 * seconds which the read attempt will block in case the DMA overrun 213 * is persistent. 214 */ 215 #define FDC_DMAOV_MAX 25 216 217 /* 218 * Timeout value for the PIO loops to wait until the FDC main status 219 * register matches our expectations (request for master, direction 220 * bit). This is supposed to be a number of microseconds, although 221 * timing might actually not be very accurate. 222 * 223 * Timeouts of 100 msec are believed to be required for some broken 224 * (old) hardware. 225 */ 226 #define FDSTS_TIMEOUT 100000 227 228 /* 229 * Number of subdevices that can be used for different density types. 230 * By now, the lower 6 bit of the minor number are reserved for this, 231 * allowing for up to 64 subdevices, but we only use 16 out of this. 232 * Density #0 is used for automatic format detection, the other 233 * densities are available as programmable densities (for assignment 234 * by fdcontrol(8)). 235 * The upper 2 bits of the minor number are reserved for the subunit 236 * (drive #) per controller. 237 */ 238 #define NUMDENS 16 239 240 #define FDBIO_RDSECTID BIO_CMD1 241 242 /* 243 * List of native drive densities. Order must match enum fd_drivetype 244 * in <sys/fdcio.h>. Upon attaching the drive, each of the 245 * programmable subdevices is initialized with the native density 246 * definition. 247 */ 248 static struct fd_type fd_native_types[] = 249 { 250 { 0 }, /* FDT_NONE */ 251 { 9,2,0xFF,0x2A,40, 720,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_360K */ 252 { 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* FDT_12M */ 253 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_720K */ 254 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */ 255 #if 0 /* we currently don't handle 2.88 MB */ 256 { 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /*FDT_288M*/ 257 #else 258 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */ 259 #endif 260 }; 261 262 /* 263 * 360 KB 5.25" and 720 KB 3.5" drives don't have automatic density 264 * selection, they just start out with their native density (or lose). 265 * So 1.2 MB 5.25", 1.44 MB 3.5", and 2.88 MB 3.5" drives have their 266 * respective lists of densities to search for. 267 */ 268 static struct fd_type fd_searchlist_12m[] = { 269 { 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* 1.2M */ 270 { 9,2,0xFF,0x23,40, 720,FDC_300KBPS,2,0x50,1,0,FL_MFM|FL_2STEP }, /* 360K */ 271 { 9,2,0xFF,0x20,80,1440,FDC_300KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 272 }; 273 274 static struct fd_type fd_searchlist_144m[] = { 275 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */ 276 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 277 }; 278 279 /* We search for 1.44M first since this is the most common case. */ 280 static struct fd_type fd_searchlist_288m[] = { 281 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */ 282 #if 0 283 { 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /* 2.88M */ 284 #endif 285 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 286 }; 287 288 #define MAX_SEC_SIZE (128 << 3) 289 #define MAX_CYLINDER 85 /* some people really stress their drives 290 * up to cyl 82 */ 291 #define MAX_HEAD 1 292 293 static devclass_t fdc_devclass; 294 295 /* 296 * Per drive structure (softc). 297 */ 298 struct fd_data { 299 struct fdc_data *fdc; /* pointer to controller structure */ 300 int fdsu; /* this units number on this controller */ 301 enum fd_drivetype type; /* drive type */ 302 struct fd_type *ft; /* pointer to current type descriptor */ 303 struct fd_type fts[NUMDENS]; /* type descriptors */ 304 int flags; 305 #define FD_OPEN 0x01 /* it's open */ 306 #define FD_NONBLOCK 0x02 /* O_NONBLOCK set */ 307 #define FD_ACTIVE 0x04 /* it's active */ 308 #define FD_MOTOR 0x08 /* motor should be on */ 309 #define FD_MOTOR_WAIT 0x10 /* motor coming up */ 310 #define FD_UA 0x20 /* force unit attention */ 311 int skip; 312 int hddrv; 313 #define FD_NO_TRACK -2 314 int track; /* where we think the head is */ 315 int options; /* user configurable options, see fdcio.h */ 316 struct callout_handle toffhandle; 317 struct callout_handle tohandle; 318 struct devstat *device_stats; 319 eventhandler_tag clonetag; 320 dev_t masterdev; 321 dev_t clonedevs[NUMDENS - 1]; 322 device_t dev; 323 fdu_t fdu; 324 }; 325 326 struct fdc_ivars { 327 int fdunit; 328 }; 329 static devclass_t fd_devclass; 330 331 /* configuration flags for fd */ 332 #define FD_TYPEMASK 0x0f /* drive type, matches enum 333 * fd_drivetype; on i386 machines, if 334 * given as 0, use RTC type for fd0 335 * and fd1 */ 336 #define FD_DTYPE(flags) ((flags) & FD_TYPEMASK) 337 #define FD_NO_CHLINE 0x10 /* drive does not support changeline 338 * aka. unit attention */ 339 #define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just 340 * assume it is there */ 341 342 /* 343 * Throughout this file the following conventions will be used: 344 * 345 * fd is a pointer to the fd_data struct for the drive in question 346 * fdc is a pointer to the fdc_data struct for the controller 347 * fdu is the floppy drive unit number 348 * fdcu is the floppy controller unit number 349 * fdsu is the floppy drive unit number on that controller. (sub-unit) 350 */ 351 352 /* 353 * Function declarations, same (chaotic) order as they appear in the 354 * file. Re-ordering is too late now, it would only obfuscate the 355 * diffs against old and offspring versions (like the PC98 one). 356 * 357 * Anyone adding functions here, please keep this sequence the same 358 * as below -- makes locating a particular function in the body much 359 * easier. 360 */ 361 static void fdout_wr(fdc_p, u_int8_t); 362 static u_int8_t fdsts_rd(fdc_p); 363 static void fddata_wr(fdc_p, u_int8_t); 364 static u_int8_t fddata_rd(fdc_p); 365 static void fdctl_wr_isa(fdc_p, u_int8_t); 366 #if NCARD > 0 367 static void fdctl_wr_pcmcia(fdc_p, u_int8_t); 368 #endif 369 #if 0 370 static u_int8_t fdin_rd(fdc_p); 371 #endif 372 static int fdc_err(struct fdc_data *, const char *); 373 static int fd_cmd(struct fdc_data *, int, ...); 374 static int enable_fifo(fdc_p fdc); 375 static int fd_sense_drive_status(fdc_p, int *); 376 static int fd_sense_int(fdc_p, int *, int *); 377 static int fd_read_status(fdc_p); 378 static int fdc_alloc_resources(struct fdc_data *); 379 static void fdc_release_resources(struct fdc_data *); 380 static int fdc_read_ivar(device_t, device_t, int, uintptr_t *); 381 static int fdc_probe(device_t); 382 #if NCARD > 0 383 static int fdc_pccard_probe(device_t); 384 #endif 385 static int fdc_detach(device_t dev); 386 static void fdc_add_child(device_t, const char *, int); 387 static int fdc_attach(device_t); 388 static int fdc_print_child(device_t, device_t); 389 static void fd_clone (void *, char *, int, dev_t *); 390 static int fd_probe(device_t); 391 static int fd_attach(device_t); 392 static int fd_detach(device_t); 393 static void set_motor(struct fdc_data *, int, int); 394 # define TURNON 1 395 # define TURNOFF 0 396 static timeout_t fd_turnoff; 397 static timeout_t fd_motor_on; 398 static void fd_turnon(struct fd_data *); 399 static void fdc_reset(fdc_p); 400 static int fd_in(struct fdc_data *, int *); 401 static int out_fdc(struct fdc_data *, int); 402 /* 403 * The open function is named Fdopen() to avoid confusion with fdopen() 404 * in fd(4). The difference is now only meaningful for debuggers. 405 */ 406 static d_open_t Fdopen; 407 static d_close_t fdclose; 408 static d_strategy_t fdstrategy; 409 static void fdstart(struct fdc_data *); 410 static timeout_t fd_iotimeout; 411 static timeout_t fd_pseudointr; 412 static driver_intr_t fdc_intr; 413 static int fdcpio(fdc_p, long, caddr_t, u_int); 414 static int fdautoselect(dev_t); 415 static int fdstate(struct fdc_data *); 416 static int retrier(struct fdc_data *); 417 static void fdbiodone(struct bio *); 418 static int fdmisccmd(dev_t, u_int, void *); 419 static d_ioctl_t fdioctl; 420 421 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 422 423 #ifdef FDC_DEBUG 424 /* CAUTION: fd_debug causes huge amounts of logging output */ 425 static int volatile fd_debug = 0; 426 #define TRACE0(arg) do { if (fd_debug) printf(arg); } while (0) 427 #define TRACE1(arg1, arg2) do { if (fd_debug) printf(arg1, arg2); } while (0) 428 #else /* FDC_DEBUG */ 429 #define TRACE0(arg) do { } while (0) 430 #define TRACE1(arg1, arg2) do { } while (0) 431 #endif /* FDC_DEBUG */ 432 433 /* 434 * Bus space handling (access to low-level IO). 435 */ 436 static void 437 fdout_wr(fdc_p fdc, u_int8_t v) 438 { 439 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 440 } 441 442 static u_int8_t 443 fdsts_rd(fdc_p fdc) 444 { 445 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 446 } 447 448 static void 449 fddata_wr(fdc_p fdc, u_int8_t v) 450 { 451 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 452 } 453 454 static u_int8_t 455 fddata_rd(fdc_p fdc) 456 { 457 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 458 } 459 460 static void 461 fdctl_wr_isa(fdc_p fdc, u_int8_t v) 462 { 463 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 464 } 465 466 #if NCARD > 0 467 static void 468 fdctl_wr_pcmcia(fdc_p fdc, u_int8_t v) 469 { 470 bus_space_write_1(fdc->portt, fdc->porth, FDCTL+fdc->port_off, v); 471 } 472 #endif 473 474 static u_int8_t 475 fdin_rd(fdc_p fdc) 476 { 477 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 478 } 479 480 #define CDEV_MAJOR 9 481 static struct cdevsw fd_cdevsw = { 482 .d_open = Fdopen, 483 .d_close = fdclose, 484 .d_read = physread, 485 .d_write = physwrite, 486 .d_ioctl = fdioctl, 487 .d_strategy = fdstrategy, 488 .d_name = "fd", 489 .d_maj = CDEV_MAJOR, 490 .d_flags = D_DISK, 491 }; 492 493 /* 494 * Auxiliary functions. Well, some only. Others are scattered 495 * throughout the entire file. 496 */ 497 static int 498 fdc_err(struct fdc_data *fdc, const char *s) 499 { 500 fdc->fdc_errs++; 501 if (s) { 502 if (fdc->fdc_errs < FDC_ERRMAX) 503 device_printf(fdc->fdc_dev, "%s", s); 504 else if (fdc->fdc_errs == FDC_ERRMAX) 505 device_printf(fdc->fdc_dev, "too many errors, not " 506 "logging any more\n"); 507 } 508 509 return FD_FAILED; 510 } 511 512 /* 513 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 514 * Unit number, 515 * # of output bytes, output bytes as ints ..., 516 * # of input bytes, input bytes as ints ... 517 */ 518 static int 519 fd_cmd(struct fdc_data *fdc, int n_out, ...) 520 { 521 u_char cmd; 522 int n_in; 523 int n; 524 va_list ap; 525 526 va_start(ap, n_out); 527 cmd = (u_char)(va_arg(ap, int)); 528 va_end(ap); 529 va_start(ap, n_out); 530 for (n = 0; n < n_out; n++) 531 { 532 if (out_fdc(fdc, va_arg(ap, int)) < 0) 533 { 534 char msg[50]; 535 snprintf(msg, sizeof(msg), 536 "cmd %x failed at out byte %d of %d\n", 537 cmd, n + 1, n_out); 538 return fdc_err(fdc, msg); 539 } 540 } 541 n_in = va_arg(ap, int); 542 for (n = 0; n < n_in; n++) 543 { 544 int *ptr = va_arg(ap, int *); 545 if (fd_in(fdc, ptr) < 0) 546 { 547 char msg[50]; 548 snprintf(msg, sizeof(msg), 549 "cmd %02x failed at in byte %d of %d\n", 550 cmd, n + 1, n_in); 551 return fdc_err(fdc, msg); 552 } 553 } 554 555 return 0; 556 } 557 558 static int 559 enable_fifo(fdc_p fdc) 560 { 561 int i, j; 562 563 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 564 565 /* 566 * Cannot use fd_cmd the normal way here, since 567 * this might be an invalid command. Thus we send the 568 * first byte, and check for an early turn of data directon. 569 */ 570 571 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 572 return fdc_err(fdc, "Enable FIFO failed\n"); 573 574 /* If command is invalid, return */ 575 j = FDSTS_TIMEOUT; 576 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 577 != NE7_RQM && j-- > 0) { 578 if (i == (NE7_DIO | NE7_RQM)) { 579 fdc_reset(fdc); 580 return FD_FAILED; 581 } 582 DELAY(1); 583 } 584 if (j<0 || 585 fd_cmd(fdc, 3, 586 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 587 fdc_reset(fdc); 588 return fdc_err(fdc, "Enable FIFO failed\n"); 589 } 590 fdc->flags |= FDC_HAS_FIFO; 591 return 0; 592 } 593 if (fd_cmd(fdc, 4, 594 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 595 return fdc_err(fdc, "Re-enable FIFO failed\n"); 596 return 0; 597 } 598 599 static int 600 fd_sense_drive_status(fdc_p fdc, int *st3p) 601 { 602 int st3; 603 604 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 605 { 606 return fdc_err(fdc, "Sense Drive Status failed\n"); 607 } 608 if (st3p) 609 *st3p = st3; 610 611 return 0; 612 } 613 614 static int 615 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 616 { 617 int cyl, st0, ret; 618 619 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 620 if (ret) { 621 (void)fdc_err(fdc, 622 "sense intr err reading stat reg 0\n"); 623 return ret; 624 } 625 626 if (st0p) 627 *st0p = st0; 628 629 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 630 /* 631 * There doesn't seem to have been an interrupt. 632 */ 633 return FD_NOT_VALID; 634 } 635 636 if (fd_in(fdc, &cyl) < 0) { 637 return fdc_err(fdc, "can't get cyl num\n"); 638 } 639 640 if (cylp) 641 *cylp = cyl; 642 643 return 0; 644 } 645 646 647 static int 648 fd_read_status(fdc_p fdc) 649 { 650 int i, ret; 651 652 for (i = ret = 0; i < 7; i++) { 653 /* 654 * XXX types are poorly chosen. Only bytes can be read 655 * from the hardware, but fdc->status[] wants u_ints and 656 * fd_in() gives ints. 657 */ 658 int status; 659 660 ret = fd_in(fdc, &status); 661 fdc->status[i] = status; 662 if (ret != 0) 663 break; 664 } 665 666 if (ret == 0) 667 fdc->flags |= FDC_STAT_VALID; 668 else 669 fdc->flags &= ~FDC_STAT_VALID; 670 671 return ret; 672 } 673 674 static int 675 fdc_alloc_resources(struct fdc_data *fdc) 676 { 677 device_t dev; 678 int ispnp, ispcmcia, nports; 679 680 dev = fdc->fdc_dev; 681 ispnp = (fdc->flags & FDC_ISPNP) != 0; 682 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 683 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 684 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 685 686 /* 687 * On standard ISA, we don't just use an 8 port range 688 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 689 * register at 0x3f6. 690 * 691 * Isn't PC hardware wonderful. 692 * 693 * The Y-E Data PCMCIA FDC doesn't have this problem, it 694 * uses the register with offset 6 for pseudo-DMA, and the 695 * one with offset 7 as control register. 696 */ 697 nports = ispcmcia ? 8 : (ispnp ? 1 : 6); 698 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 699 &fdc->rid_ioport, 0ul, ~0ul, 700 nports, RF_ACTIVE); 701 if (fdc->res_ioport == 0) { 702 device_printf(dev, "cannot reserve I/O port range (%d ports)\n", 703 nports); 704 return ENXIO; 705 } 706 fdc->portt = rman_get_bustag(fdc->res_ioport); 707 fdc->porth = rman_get_bushandle(fdc->res_ioport); 708 709 if (!ispcmcia) { 710 /* 711 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 712 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 713 * by checking the size and adjust the port address 714 * accordingly. 715 */ 716 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 717 fdc->port_off = -2; 718 719 /* 720 * Register the control port range as rid 1 if it 721 * isn't there already. Most PnP BIOSen will have 722 * already done this but non-PnP configurations don't. 723 * 724 * And some (!!) report 0x3f2-0x3f5 and completely 725 * leave out the control register! It seems that some 726 * non-antique controller chips have a different 727 * method of programming the transfer speed which 728 * doesn't require the control register, but it's 729 * mighty bogus as the chip still responds to the 730 * address for the control register. 731 */ 732 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 733 u_long ctlstart; 734 735 /* Find the control port, usually 0x3f7 */ 736 ctlstart = rman_get_start(fdc->res_ioport) + 737 fdc->port_off + 7; 738 739 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); 740 } 741 742 /* 743 * Now (finally!) allocate the control port. 744 */ 745 fdc->rid_ctl = 1; 746 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 747 &fdc->rid_ctl, 748 0ul, ~0ul, 1, RF_ACTIVE); 749 if (fdc->res_ctl == 0) { 750 device_printf(dev, 751 "cannot reserve control I/O port range (control port)\n"); 752 return ENXIO; 753 } 754 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 755 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 756 } 757 758 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 759 &fdc->rid_irq, 0ul, ~0ul, 1, 760 RF_ACTIVE); 761 if (fdc->res_irq == 0) { 762 device_printf(dev, "cannot reserve interrupt line\n"); 763 return ENXIO; 764 } 765 766 if ((fdc->flags & FDC_NODMA) == 0) { 767 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 768 &fdc->rid_drq, 0ul, ~0ul, 1, 769 RF_ACTIVE); 770 if (fdc->res_drq == 0) { 771 device_printf(dev, "cannot reserve DMA request line\n"); 772 return ENXIO; 773 } 774 fdc->dmachan = fdc->res_drq->r_start; 775 } 776 777 return 0; 778 } 779 780 static void 781 fdc_release_resources(struct fdc_data *fdc) 782 { 783 device_t dev; 784 785 dev = fdc->fdc_dev; 786 if (fdc->res_irq != 0) { 787 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 788 fdc->res_irq); 789 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 790 fdc->res_irq); 791 } 792 if (fdc->res_ctl != 0) { 793 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 794 fdc->res_ctl); 795 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 796 fdc->res_ctl); 797 } 798 if (fdc->res_ioport != 0) { 799 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 800 fdc->res_ioport); 801 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 802 fdc->res_ioport); 803 } 804 if (fdc->res_drq != 0) { 805 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 806 fdc->res_drq); 807 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 808 fdc->res_drq); 809 } 810 } 811 812 /* 813 * Configuration/initialization stuff, per controller. 814 */ 815 816 static struct isa_pnp_id fdc_ids[] = { 817 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 818 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 819 {0} 820 }; 821 822 static int 823 fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 824 { 825 struct fdc_ivars *ivars = device_get_ivars(child); 826 827 switch (which) { 828 case FDC_IVAR_FDUNIT: 829 *result = ivars->fdunit; 830 break; 831 default: 832 return ENOENT; 833 } 834 return 0; 835 } 836 837 static int 838 fdc_probe(device_t dev) 839 { 840 int error, ic_type; 841 struct fdc_data *fdc; 842 843 fdc = device_get_softc(dev); 844 bzero(fdc, sizeof *fdc); 845 fdc->fdc_dev = dev; 846 fdc->fdctl_wr = fdctl_wr_isa; 847 848 /* Check pnp ids */ 849 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 850 if (error == ENXIO) 851 return ENXIO; 852 if (error == 0) 853 fdc->flags |= FDC_ISPNP; 854 855 /* Attempt to allocate our resources for the duration of the probe */ 856 error = fdc_alloc_resources(fdc); 857 if (error) 858 goto out; 859 860 /* First - lets reset the floppy controller */ 861 fdout_wr(fdc, 0); 862 DELAY(100); 863 fdout_wr(fdc, FDO_FRST); 864 865 /* see if it can handle a command */ 866 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 867 NE7_SPEC_2(2, 0), 0)) { 868 error = ENXIO; 869 goto out; 870 } 871 872 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 873 ic_type = (u_char)ic_type; 874 switch (ic_type) { 875 case 0x80: 876 device_set_desc(dev, "NEC 765 or clone"); 877 fdc->fdct = FDC_NE765; 878 break; 879 case 0x81: /* not mentioned in any hardware doc */ 880 case 0x90: 881 device_set_desc(dev, 882 "Enhanced floppy controller (i82077, NE72065 or clone)"); 883 fdc->fdct = FDC_ENHANCED; 884 break; 885 default: 886 device_set_desc(dev, "Generic floppy controller"); 887 fdc->fdct = FDC_UNKNOWN; 888 break; 889 } 890 } 891 892 out: 893 fdc_release_resources(fdc); 894 return (error); 895 } 896 897 #if NCARD > 0 898 899 static int 900 fdc_pccard_probe(device_t dev) 901 { 902 int error; 903 struct fdc_data *fdc; 904 905 fdc = device_get_softc(dev); 906 bzero(fdc, sizeof *fdc); 907 fdc->fdc_dev = dev; 908 fdc->fdctl_wr = fdctl_wr_pcmcia; 909 910 fdc->flags |= FDC_ISPCMCIA | FDC_NODMA; 911 912 /* Attempt to allocate our resources for the duration of the probe */ 913 error = fdc_alloc_resources(fdc); 914 if (error) 915 goto out; 916 917 /* First - lets reset the floppy controller */ 918 fdout_wr(fdc, 0); 919 DELAY(100); 920 fdout_wr(fdc, FDO_FRST); 921 922 /* see if it can handle a command */ 923 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 924 NE7_SPEC_2(2, 0), 0)) { 925 error = ENXIO; 926 goto out; 927 } 928 929 device_set_desc(dev, "Y-E Data PCMCIA floppy"); 930 fdc->fdct = FDC_NE765; 931 932 out: 933 fdc_release_resources(fdc); 934 return (error); 935 } 936 937 #endif /* NCARD > 0 */ 938 939 static int 940 fdc_detach(device_t dev) 941 { 942 struct fdc_data *fdc; 943 int error; 944 945 fdc = device_get_softc(dev); 946 947 /* have our children detached first */ 948 if ((error = bus_generic_detach(dev))) 949 return (error); 950 951 /* reset controller, turn motor off */ 952 fdout_wr(fdc, 0); 953 954 if ((fdc->flags & FDC_NODMA) == 0) 955 isa_dma_release(fdc->dmachan); 956 957 if ((fdc->flags & FDC_ATTACHED) == 0) { 958 device_printf(dev, "already unloaded\n"); 959 return (0); 960 } 961 fdc->flags &= ~FDC_ATTACHED; 962 963 BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq, 964 fdc->fdc_intr); 965 fdc_release_resources(fdc); 966 device_printf(dev, "unload\n"); 967 return (0); 968 } 969 970 /* 971 * Add a child device to the fdc controller. It will then be probed etc. 972 */ 973 static void 974 fdc_add_child(device_t dev, const char *name, int unit) 975 { 976 int disabled, flags; 977 struct fdc_ivars *ivar; 978 device_t child; 979 980 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO); 981 if (ivar == NULL) 982 return; 983 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 984 ivar->fdunit = 0; 985 child = device_add_child(dev, name, unit); 986 if (child == NULL) { 987 free(ivar, M_DEVBUF); 988 return; 989 } 990 device_set_ivars(child, ivar); 991 if (resource_int_value(name, unit, "flags", &flags) == 0) 992 device_set_flags(child, flags); 993 if (resource_int_value(name, unit, "disabled", &disabled) == 0 994 && disabled != 0) 995 device_disable(child); 996 } 997 998 static int 999 fdc_attach(device_t dev) 1000 { 1001 struct fdc_data *fdc; 1002 const char *name, *dname; 1003 int i, error, dunit; 1004 1005 fdc = device_get_softc(dev); 1006 error = fdc_alloc_resources(fdc); 1007 if (error) { 1008 device_printf(dev, "cannot re-acquire resources\n"); 1009 return error; 1010 } 1011 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 1012 INTR_TYPE_BIO | INTR_ENTROPY, fdc_intr, fdc, 1013 &fdc->fdc_intr); 1014 if (error) { 1015 device_printf(dev, "cannot setup interrupt\n"); 1016 return error; 1017 } 1018 fdc->fdcu = device_get_unit(dev); 1019 fdc->flags |= FDC_ATTACHED | FDC_NEEDS_RESET; 1020 1021 if ((fdc->flags & FDC_NODMA) == 0) { 1022 /* 1023 * Acquire the DMA channel forever, the driver will do 1024 * the rest 1025 * XXX should integrate with rman 1026 */ 1027 isa_dma_acquire(fdc->dmachan); 1028 isa_dmainit(fdc->dmachan, MAX_SEC_SIZE); 1029 } 1030 fdc->state = DEVIDLE; 1031 1032 /* reset controller, turn motor off, clear fdout mirror reg */ 1033 fdout_wr(fdc, fdc->fdout = 0); 1034 bioq_init(&fdc->head); 1035 1036 /* 1037 * Probe and attach any children. We should probably detect 1038 * devices from the BIOS unless overridden. 1039 */ 1040 name = device_get_nameunit(dev); 1041 i = 0; 1042 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) 1043 fdc_add_child(dev, dname, dunit); 1044 1045 if ((error = bus_generic_attach(dev)) != 0) 1046 return (error); 1047 1048 return (0); 1049 } 1050 1051 static int 1052 fdc_print_child(device_t me, device_t child) 1053 { 1054 int retval = 0, flags; 1055 1056 retval += bus_print_child_header(me, child); 1057 retval += printf(" on %s drive %d", device_get_nameunit(me), 1058 fdc_get_fdunit(child)); 1059 if ((flags = device_get_flags(me)) != 0) 1060 retval += printf(" flags %#x", flags); 1061 retval += printf("\n"); 1062 1063 return (retval); 1064 } 1065 1066 static device_method_t fdc_methods[] = { 1067 /* Device interface */ 1068 DEVMETHOD(device_probe, fdc_probe), 1069 DEVMETHOD(device_attach, fdc_attach), 1070 DEVMETHOD(device_detach, fdc_detach), 1071 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1072 DEVMETHOD(device_suspend, bus_generic_suspend), 1073 DEVMETHOD(device_resume, bus_generic_resume), 1074 1075 /* Bus interface */ 1076 DEVMETHOD(bus_print_child, fdc_print_child), 1077 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 1078 /* Our children never use any other bus interface methods. */ 1079 1080 { 0, 0 } 1081 }; 1082 1083 static driver_t fdc_driver = { 1084 "fdc", 1085 fdc_methods, 1086 sizeof(struct fdc_data) 1087 }; 1088 1089 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 1090 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, 0, 0); 1091 1092 #if NCARD > 0 1093 1094 static device_method_t fdc_pccard_methods[] = { 1095 /* Device interface */ 1096 DEVMETHOD(device_probe, fdc_pccard_probe), 1097 DEVMETHOD(device_attach, fdc_attach), 1098 DEVMETHOD(device_detach, fdc_detach), 1099 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1100 DEVMETHOD(device_suspend, bus_generic_suspend), 1101 DEVMETHOD(device_resume, bus_generic_resume), 1102 1103 /* Bus interface */ 1104 DEVMETHOD(bus_print_child, fdc_print_child), 1105 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 1106 /* Our children never use any other bus interface methods. */ 1107 1108 { 0, 0 } 1109 }; 1110 1111 static driver_t fdc_pccard_driver = { 1112 "fdc", 1113 fdc_pccard_methods, 1114 sizeof(struct fdc_data) 1115 }; 1116 1117 DRIVER_MODULE(fdc, pccard, fdc_pccard_driver, fdc_devclass, 0, 0); 1118 1119 #endif /* NCARD > 0 */ 1120 1121 /* 1122 * Create a clone device upon request by devfs. 1123 */ 1124 static void 1125 fd_clone(void *arg, char *name, int namelen, dev_t *dev) 1126 { 1127 struct fd_data *fd; 1128 int i, u; 1129 char *n; 1130 size_t l; 1131 1132 fd = (struct fd_data *)arg; 1133 if (*dev != NODEV) 1134 return; 1135 if (dev_stdclone(name, &n, "fd", &u) != 2) 1136 return; 1137 if (u != fd->fdu) 1138 /* unit # mismatch */ 1139 return; 1140 l = strlen(n); 1141 if (l == 1 && *n >= 'a' && *n <= 'h') { 1142 /* 1143 * Trailing letters a through h denote 1144 * pseudo-partitions. We don't support true 1145 * (UFS-style) partitions, so we just implement them 1146 * as symlinks if someone asks us nicely. 1147 */ 1148 *dev = make_dev_alias(fd->masterdev, name); 1149 return; 1150 } 1151 if (l >= 2 && l <= 5 && *n == '.') { 1152 /* 1153 * Trailing numbers, preceded by a dot, denote 1154 * subdevices for different densities. Historically, 1155 * they have been named by density (like fd0.1440), 1156 * but we allow arbitrary numbers between 1 and 4 1157 * digits, so fd0.1 through fd0.15 are possible as 1158 * well. 1159 */ 1160 for (i = 1; i < l; i++) 1161 if (n[i] < '0' || n[i] > '9') 1162 return; 1163 for (i = 0; i < NUMDENS - 1; i++) 1164 if (fd->clonedevs[i] == NODEV) { 1165 *dev = make_dev(&fd_cdevsw, 1166 FDNUMTOUNIT(u) + i + 1, 1167 UID_ROOT, GID_OPERATOR, 0640, 1168 name); 1169 fd->clonedevs[i] = *dev; 1170 return; 1171 } 1172 } 1173 } 1174 1175 /* 1176 * Configuration/initialization, per drive. 1177 */ 1178 static int 1179 fd_probe(device_t dev) 1180 { 1181 int i; 1182 u_int st0, st3; 1183 struct fd_data *fd; 1184 struct fdc_data *fdc; 1185 fdsu_t fdsu; 1186 int flags; 1187 1188 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 1189 fd = device_get_softc(dev); 1190 fdc = device_get_softc(device_get_parent(dev)); 1191 flags = device_get_flags(dev); 1192 1193 bzero(fd, sizeof *fd); 1194 fd->dev = dev; 1195 fd->fdc = fdc; 1196 fd->fdsu = fdsu; 1197 fd->fdu = device_get_unit(dev); 1198 fd->flags = FD_UA; /* make sure fdautoselect() will be called */ 1199 1200 fd->type = FD_DTYPE(flags); 1201 /* 1202 * XXX I think using __i386__ is wrong here since we actually want to probe 1203 * for the machine type, not the CPU type (so non-PC arch's like the PC98 will 1204 * fail the probe). However, for whatever reason, testing for _MACHINE_ARCH 1205 * == i386 breaks the test on FreeBSD/Alpha. 1206 */ 1207 #ifdef __i386__ 1208 if (fd->type == FDT_NONE && (fd->fdu == 0 || fd->fdu == 1)) { 1209 /* Look up what the BIOS thinks we have. */ 1210 if (fd->fdu == 0) { 1211 if ((fdc->flags & FDC_ISPCMCIA)) 1212 /* 1213 * Somewhat special. No need to force the 1214 * user to set device flags, since the Y-E 1215 * Data PCMCIA floppy is always a 1.44 MB 1216 * device. 1217 */ 1218 fd->type = FDT_144M; 1219 else 1220 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4; 1221 } else { 1222 fd->type = rtcin(RTC_FDISKETTE) & 0x0f; 1223 } 1224 if (fd->type == FDT_288M_1) 1225 fd->type = FDT_288M; 1226 } 1227 #endif /* __i386__ */ 1228 /* is there a unit? */ 1229 if (fd->type == FDT_NONE) 1230 return (ENXIO); 1231 1232 /* select it */ 1233 set_motor(fdc, fdsu, TURNON); 1234 fdc_reset(fdc); /* XXX reset, then unreset, etc. */ 1235 DELAY(1000000); /* 1 sec */ 1236 1237 /* XXX This doesn't work before the first set_motor() */ 1238 if ((fdc->flags & FDC_HAS_FIFO) == 0 && 1239 fdc->fdct == FDC_ENHANCED && 1240 (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 && 1241 enable_fifo(fdc) == 0) { 1242 device_printf(device_get_parent(dev), 1243 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 1244 } 1245 1246 if ((flags & FD_NO_PROBE) == 0) { 1247 /* If we're at track 0 first seek inwards. */ 1248 if ((fd_sense_drive_status(fdc, &st3) == 0) && 1249 (st3 & NE7_ST3_T0)) { 1250 /* Seek some steps... */ 1251 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 1252 /* ...wait a moment... */ 1253 DELAY(300000); 1254 /* make ctrlr happy: */ 1255 fd_sense_int(fdc, 0, 0); 1256 } 1257 } 1258 1259 for (i = 0; i < 2; i++) { 1260 /* 1261 * we must recalibrate twice, just in case the 1262 * heads have been beyond cylinder 76, since 1263 * most FDCs still barf when attempting to 1264 * recalibrate more than 77 steps 1265 */ 1266 /* go back to 0: */ 1267 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 1268 /* a second being enough for full stroke seek*/ 1269 DELAY(i == 0 ? 1000000 : 300000); 1270 1271 /* anything responding? */ 1272 if (fd_sense_int(fdc, &st0, 0) == 0 && 1273 (st0 & NE7_ST0_EC) == 0) 1274 break; /* already probed succesfully */ 1275 } 1276 } 1277 } 1278 1279 set_motor(fdc, fdsu, TURNOFF); 1280 1281 if ((flags & FD_NO_PROBE) == 0 && 1282 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */ 1283 return (ENXIO); 1284 1285 switch (fd->type) { 1286 case FDT_12M: 1287 device_set_desc(dev, "1200-KB 5.25\" drive"); 1288 fd->type = FDT_12M; 1289 break; 1290 case FDT_144M: 1291 device_set_desc(dev, "1440-KB 3.5\" drive"); 1292 fd->type = FDT_144M; 1293 break; 1294 case FDT_288M: 1295 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 1296 fd->type = FDT_288M; 1297 break; 1298 case FDT_360K: 1299 device_set_desc(dev, "360-KB 5.25\" drive"); 1300 fd->type = FDT_360K; 1301 break; 1302 case FDT_720K: 1303 device_set_desc(dev, "720-KB 3.5\" drive"); 1304 fd->type = FDT_720K; 1305 break; 1306 default: 1307 return (ENXIO); 1308 } 1309 fd->track = FD_NO_TRACK; 1310 fd->fdc = fdc; 1311 fd->fdsu = fdsu; 1312 fd->options = 0; 1313 callout_handle_init(&fd->toffhandle); 1314 callout_handle_init(&fd->tohandle); 1315 1316 /* initialize densities for subdevices */ 1317 for (i = 0; i < NUMDENS; i++) 1318 memcpy(fd->fts + i, fd_native_types + fd->type, 1319 sizeof(struct fd_type)); 1320 return (0); 1321 } 1322 1323 static int 1324 fd_attach(device_t dev) 1325 { 1326 struct fd_data *fd; 1327 int i; 1328 1329 fd = device_get_softc(dev); 1330 fd->clonetag = EVENTHANDLER_REGISTER(dev_clone, fd_clone, fd, 1000); 1331 fd->masterdev = make_dev(&fd_cdevsw, fd->fdu << 6, 1332 UID_ROOT, GID_OPERATOR, 0640, "fd%d", fd->fdu); 1333 for (i = 0; i < NUMDENS - 1; i++) 1334 fd->clonedevs[i] = NODEV; 1335 fd->device_stats = devstat_new_entry(device_get_name(dev), 1336 device_get_unit(dev), 0, DEVSTAT_NO_ORDERED_TAGS, 1337 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1338 DEVSTAT_PRIORITY_FD); 1339 return (0); 1340 } 1341 1342 static int 1343 fd_detach(device_t dev) 1344 { 1345 struct fd_data *fd; 1346 int i; 1347 1348 fd = device_get_softc(dev); 1349 untimeout(fd_turnoff, fd, fd->toffhandle); 1350 devstat_remove_entry(fd->device_stats); 1351 destroy_dev(fd->masterdev); 1352 for (i = 0; i < NUMDENS - 1; i++) 1353 if (fd->clonedevs[i] != NODEV) 1354 destroy_dev(fd->clonedevs[i]); 1355 EVENTHANDLER_DEREGISTER(dev_clone, fd->clonetag); 1356 1357 return (0); 1358 } 1359 1360 static device_method_t fd_methods[] = { 1361 /* Device interface */ 1362 DEVMETHOD(device_probe, fd_probe), 1363 DEVMETHOD(device_attach, fd_attach), 1364 DEVMETHOD(device_detach, fd_detach), 1365 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1366 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1367 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1368 1369 { 0, 0 } 1370 }; 1371 1372 static driver_t fd_driver = { 1373 "fd", 1374 fd_methods, 1375 sizeof(struct fd_data) 1376 }; 1377 1378 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1379 1380 /* 1381 * More auxiliary functions. 1382 */ 1383 /* 1384 * Motor control stuff. 1385 * Remember to not deselect the drive we're working on. 1386 */ 1387 static void 1388 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1389 { 1390 int fdout; 1391 1392 fdout = fdc->fdout; 1393 if (turnon) { 1394 fdout &= ~FDO_FDSEL; 1395 fdout |= (FDO_MOEN0 << fdsu) | FDO_FDMAEN | FDO_FRST | fdsu; 1396 } else 1397 fdout &= ~(FDO_MOEN0 << fdsu); 1398 fdc->fdout = fdout; 1399 fdout_wr(fdc, fdout); 1400 TRACE1("[0x%x->FDOUT]", fdout); 1401 } 1402 1403 static void 1404 fd_turnoff(void *xfd) 1405 { 1406 int s; 1407 fd_p fd = xfd; 1408 1409 TRACE1("[fd%d: turnoff]", fd->fdu); 1410 1411 s = splbio(); 1412 /* 1413 * Don't turn off the motor yet if the drive is active. 1414 * 1415 * If we got here, this could only mean we missed an interrupt. 1416 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1417 * after a controller reset. Just schedule a pseudo-interrupt 1418 * so the state machine gets re-entered. 1419 */ 1420 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1421 fdc_intr(fd->fdc); 1422 splx(s); 1423 return; 1424 } 1425 1426 fd->flags &= ~FD_MOTOR; 1427 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1428 splx(s); 1429 } 1430 1431 static void 1432 fd_motor_on(void *xfd) 1433 { 1434 int s; 1435 fd_p fd = xfd; 1436 1437 s = splbio(); 1438 fd->flags &= ~FD_MOTOR_WAIT; 1439 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1440 { 1441 fdc_intr(fd->fdc); 1442 } 1443 splx(s); 1444 } 1445 1446 static void 1447 fd_turnon(fd_p fd) 1448 { 1449 if(!(fd->flags & FD_MOTOR)) 1450 { 1451 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1452 set_motor(fd->fdc, fd->fdsu, TURNON); 1453 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */ 1454 } 1455 } 1456 1457 static void 1458 fdc_reset(fdc_p fdc) 1459 { 1460 /* Try a reset, keep motor on */ 1461 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1462 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1463 DELAY(100); 1464 /* enable FDC, but defer interrupts a moment */ 1465 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1466 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1467 DELAY(100); 1468 fdout_wr(fdc, fdc->fdout); 1469 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1470 1471 /* XXX after a reset, silently believe the FDC will accept commands */ 1472 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1473 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1474 0); 1475 if (fdc->flags & FDC_HAS_FIFO) 1476 (void) enable_fifo(fdc); 1477 } 1478 1479 /* 1480 * FDC IO functions, take care of the main status register, timeout 1481 * in case the desired status bits are never set. 1482 * 1483 * These PIO loops initially start out with short delays between 1484 * each iteration in the expectation that the required condition 1485 * is usually met quickly, so it can be handled immediately. After 1486 * about 1 ms, stepping is increased to achieve a better timing 1487 * accuracy in the calls to DELAY(). 1488 */ 1489 static int 1490 fd_in(struct fdc_data *fdc, int *ptr) 1491 { 1492 int i, j, step; 1493 1494 for (j = 0, step = 1; 1495 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) && 1496 j < FDSTS_TIMEOUT; 1497 j += step) { 1498 if (i == NE7_RQM) 1499 return (fdc_err(fdc, "ready for output in input\n")); 1500 if (j == 1000) 1501 step = 1000; 1502 DELAY(step); 1503 } 1504 if (j >= FDSTS_TIMEOUT) 1505 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); 1506 #ifdef FDC_DEBUG 1507 i = fddata_rd(fdc); 1508 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1509 *ptr = i; 1510 return (0); 1511 #else /* !FDC_DEBUG */ 1512 i = fddata_rd(fdc); 1513 if (ptr) 1514 *ptr = i; 1515 return (0); 1516 #endif /* FDC_DEBUG */ 1517 } 1518 1519 static int 1520 out_fdc(struct fdc_data *fdc, int x) 1521 { 1522 int i, j, step; 1523 1524 for (j = 0, step = 1; 1525 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM && 1526 j < FDSTS_TIMEOUT; 1527 j += step) { 1528 if (i == (NE7_DIO|NE7_RQM)) 1529 return (fdc_err(fdc, "ready for input in output\n")); 1530 if (j == 1000) 1531 step = 1000; 1532 DELAY(step); 1533 } 1534 if (j >= FDSTS_TIMEOUT) 1535 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); 1536 1537 /* Send the command and return */ 1538 fddata_wr(fdc, x); 1539 TRACE1("[0x%x->FDDATA]", x); 1540 return (0); 1541 } 1542 1543 /* 1544 * Block device driver interface functions (interspersed with even more 1545 * auxiliary functions). 1546 */ 1547 static int 1548 Fdopen(dev_t dev, int flags, int mode, struct thread *td) 1549 { 1550 fdu_t fdu = FDUNIT(minor(dev)); 1551 int type = FDTYPE(minor(dev)); 1552 fd_p fd; 1553 fdc_p fdc; 1554 int rv, unitattn, dflags; 1555 1556 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1557 return (ENXIO); 1558 fdc = fd->fdc; 1559 if ((fdc == NULL) || (fd->type == FDT_NONE)) 1560 return (ENXIO); 1561 if (type > NUMDENS) 1562 return (ENXIO); 1563 dflags = device_get_flags(fd->dev); 1564 /* 1565 * This is a bit bogus. It's still possible that e. g. a 1566 * descriptor gets inherited to a child, but then it's at 1567 * least for the same subdevice. By checking FD_OPEN here, we 1568 * can ensure that a device isn't attempted to be opened with 1569 * different densities at the same time where the second open 1570 * could clobber the settings from the first one. 1571 */ 1572 if (fd->flags & FD_OPEN) 1573 return (EBUSY); 1574 1575 if (type == 0) { 1576 if (flags & FNONBLOCK) { 1577 /* 1578 * Unfortunately, physio(9) discards its ioflag 1579 * argument, thus preventing us from seeing the 1580 * IO_NDELAY bit. So we need to keep track 1581 * ourselves. 1582 */ 1583 fd->flags |= FD_NONBLOCK; 1584 fd->ft = 0; 1585 } else { 1586 /* 1587 * Figure out a unit attention condition. 1588 * 1589 * If UA has been forced, proceed. 1590 * 1591 * If the drive has no changeline support, 1592 * or if the drive parameters have been lost 1593 * due to previous non-blocking access, 1594 * assume a forced UA condition. 1595 * 1596 * If motor is off, turn it on for a moment 1597 * and select our drive, in order to read the 1598 * UA hardware signal. 1599 * 1600 * If motor is on, and our drive is currently 1601 * selected, just read the hardware bit. 1602 * 1603 * If motor is on, but active for another 1604 * drive on that controller, we are lost. We 1605 * cannot risk to deselect the other drive, so 1606 * we just assume a forced UA condition to be 1607 * on the safe side. 1608 */ 1609 unitattn = 0; 1610 if ((dflags & FD_NO_CHLINE) != 0 || 1611 (fd->flags & FD_UA) != 0 || 1612 fd->ft == 0) { 1613 unitattn = 1; 1614 fd->flags &= ~FD_UA; 1615 } else if (fdc->fdout & (FDO_MOEN0 | FDO_MOEN1 | 1616 FDO_MOEN2 | FDO_MOEN3)) { 1617 if ((fdc->fdout & FDO_FDSEL) == fd->fdsu) 1618 unitattn = fdin_rd(fdc) & FDI_DCHG; 1619 else 1620 unitattn = 1; 1621 } else { 1622 set_motor(fdc, fd->fdsu, TURNON); 1623 unitattn = fdin_rd(fdc) & FDI_DCHG; 1624 set_motor(fdc, fd->fdsu, TURNOFF); 1625 } 1626 if (unitattn && (rv = fdautoselect(dev)) != 0) 1627 return (rv); 1628 } 1629 } else { 1630 fd->ft = fd->fts + type; 1631 } 1632 fd->flags |= FD_OPEN; 1633 /* 1634 * Clearing the DMA overrun counter at open time is a bit messy. 1635 * Since we're only managing one counter per controller, opening 1636 * the second drive could mess it up. Anyway, if the DMA overrun 1637 * condition is really persistent, it will eventually time out 1638 * still. OTOH, clearing it here will ensure we'll at least start 1639 * trying again after a previous (maybe even long ago) failure. 1640 * Also, this is merely a stop-gap measure only that should not 1641 * happen during normal operation, so we can tolerate it to be a 1642 * bit sloppy about this. 1643 */ 1644 fdc->dma_overruns = 0; 1645 1646 return 0; 1647 } 1648 1649 static int 1650 fdclose(dev_t dev, int flags, int mode, struct thread *td) 1651 { 1652 fdu_t fdu = FDUNIT(minor(dev)); 1653 struct fd_data *fd; 1654 1655 fd = devclass_get_softc(fd_devclass, fdu); 1656 fd->flags &= ~(FD_OPEN | FD_NONBLOCK); 1657 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR); 1658 1659 return (0); 1660 } 1661 1662 static void 1663 fdstrategy(struct bio *bp) 1664 { 1665 long blknum, nblocks; 1666 int s; 1667 fdu_t fdu; 1668 fdc_p fdc; 1669 fd_p fd; 1670 size_t fdblk; 1671 1672 fdu = FDUNIT(minor(bp->bio_dev)); 1673 fd = devclass_get_softc(fd_devclass, fdu); 1674 if (fd == 0) 1675 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1676 (u_long)major(bp->bio_dev), (u_long)minor(bp->bio_dev)); 1677 fdc = fd->fdc; 1678 bp->bio_resid = bp->bio_bcount; 1679 if (fd->type == FDT_NONE || fd->ft == 0) { 1680 if (fd->type != FDT_NONE && (fd->flags & FD_NONBLOCK)) 1681 bp->bio_error = EAGAIN; 1682 else 1683 bp->bio_error = ENXIO; 1684 bp->bio_flags |= BIO_ERROR; 1685 goto bad; 1686 } 1687 fdblk = 128 << (fd->ft->secsize); 1688 if (bp->bio_cmd != FDBIO_FORMAT && bp->bio_cmd != FDBIO_RDSECTID) { 1689 if (fd->flags & FD_NONBLOCK) { 1690 bp->bio_error = EAGAIN; 1691 bp->bio_flags |= BIO_ERROR; 1692 goto bad; 1693 } 1694 if (bp->bio_blkno < 0) { 1695 printf( 1696 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n", 1697 fdu, (u_long)bp->bio_blkno, bp->bio_bcount); 1698 bp->bio_error = EINVAL; 1699 bp->bio_flags |= BIO_ERROR; 1700 goto bad; 1701 } 1702 if ((bp->bio_bcount % fdblk) != 0) { 1703 bp->bio_error = EINVAL; 1704 bp->bio_flags |= BIO_ERROR; 1705 goto bad; 1706 } 1707 } 1708 1709 /* 1710 * Set up block calculations. 1711 */ 1712 if (bp->bio_blkno > 20000000) { 1713 /* 1714 * Reject unreasonably high block number, prevent the 1715 * multiplication below from overflowing. 1716 */ 1717 bp->bio_error = EINVAL; 1718 bp->bio_flags |= BIO_ERROR; 1719 goto bad; 1720 } 1721 blknum = bp->bio_blkno * DEV_BSIZE / fdblk; 1722 nblocks = fd->ft->size; 1723 if (blknum + bp->bio_bcount / fdblk > nblocks) { 1724 if (blknum >= nblocks) { 1725 if (bp->bio_cmd != BIO_READ) { 1726 bp->bio_error = ENOSPC; 1727 bp->bio_flags |= BIO_ERROR; 1728 } 1729 goto bad; /* not always bad, but EOF */ 1730 } 1731 bp->bio_bcount = (nblocks - blknum) * fdblk; 1732 } 1733 bp->bio_pblkno = blknum; 1734 s = splbio(); 1735 bioq_disksort(&fdc->head, bp); 1736 untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */ 1737 devstat_start_transaction_bio(fd->device_stats, bp); 1738 device_busy(fd->dev); 1739 fdstart(fdc); 1740 splx(s); 1741 return; 1742 1743 bad: 1744 biodone(bp); 1745 } 1746 1747 /* 1748 * fdstart 1749 * 1750 * We have just queued something. If the controller is not busy 1751 * then simulate the case where it has just finished a command 1752 * So that it (the interrupt routine) looks on the queue for more 1753 * work to do and picks up what we just added. 1754 * 1755 * If the controller is already busy, we need do nothing, as it 1756 * will pick up our work when the present work completes. 1757 */ 1758 static void 1759 fdstart(struct fdc_data *fdc) 1760 { 1761 int s; 1762 1763 s = splbio(); 1764 if(fdc->state == DEVIDLE) 1765 { 1766 fdc_intr(fdc); 1767 } 1768 splx(s); 1769 } 1770 1771 static void 1772 fd_iotimeout(void *xfdc) 1773 { 1774 fdc_p fdc; 1775 int s; 1776 1777 fdc = xfdc; 1778 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1779 1780 /* 1781 * Due to IBM's brain-dead design, the FDC has a faked ready 1782 * signal, hardwired to ready == true. Thus, any command 1783 * issued if there's no diskette in the drive will _never_ 1784 * complete, and must be aborted by resetting the FDC. 1785 * Many thanks, Big Blue! 1786 * The FDC must not be reset directly, since that would 1787 * interfere with the state machine. Instead, pretend that 1788 * the command completed but was invalid. The state machine 1789 * will reset the FDC and retry once. 1790 */ 1791 s = splbio(); 1792 fdc->status[0] = NE7_ST0_IC_IV; 1793 fdc->flags &= ~FDC_STAT_VALID; 1794 fdc->state = IOTIMEDOUT; 1795 fdc_intr(fdc); 1796 splx(s); 1797 } 1798 1799 /* Just ensure it has the right spl. */ 1800 static void 1801 fd_pseudointr(void *xfdc) 1802 { 1803 int s; 1804 1805 s = splbio(); 1806 fdc_intr(xfdc); 1807 splx(s); 1808 } 1809 1810 /* 1811 * fdc_intr 1812 * 1813 * Keep calling the state machine until it returns a 0. 1814 * Always called at splbio. 1815 */ 1816 static void 1817 fdc_intr(void *xfdc) 1818 { 1819 fdc_p fdc = xfdc; 1820 while(fdstate(fdc)) 1821 ; 1822 } 1823 1824 /* 1825 * Magic pseudo-DMA initialization for YE FDC. Sets count and 1826 * direction. 1827 */ 1828 #define SET_BCDR(fdc,wr,cnt,port) \ 1829 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1830 ((cnt)-1) & 0xff); \ 1831 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1832 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1833 1834 /* 1835 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy. 1836 */ 1837 static int 1838 fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count) 1839 { 1840 u_char *cptr = (u_char *)addr; 1841 1842 if (flags == BIO_READ) { 1843 if (fdc->state != PIOREAD) { 1844 fdc->state = PIOREAD; 1845 return(0); 1846 } 1847 SET_BCDR(fdc, 0, count, 0); 1848 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1849 FDC_YE_DATAPORT, cptr, count); 1850 } else { 1851 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1852 FDC_YE_DATAPORT, cptr, count); 1853 SET_BCDR(fdc, 0, count, 0); 1854 } 1855 return(1); 1856 } 1857 1858 /* 1859 * Try figuring out the density of the media present in our device. 1860 */ 1861 static int 1862 fdautoselect(dev_t dev) 1863 { 1864 fdu_t fdu; 1865 fd_p fd; 1866 struct fd_type *fdtp; 1867 struct fdc_readid id; 1868 int i, n, oopts, rv; 1869 1870 fdu = FDUNIT(minor(dev)); 1871 fd = devclass_get_softc(fd_devclass, fdu); 1872 1873 switch (fd->type) { 1874 default: 1875 return (ENXIO); 1876 1877 case FDT_360K: 1878 case FDT_720K: 1879 /* no autoselection on those drives */ 1880 fd->ft = fd_native_types + fd->type; 1881 return (0); 1882 1883 case FDT_12M: 1884 fdtp = fd_searchlist_12m; 1885 n = sizeof fd_searchlist_12m / sizeof(struct fd_type); 1886 break; 1887 1888 case FDT_144M: 1889 fdtp = fd_searchlist_144m; 1890 n = sizeof fd_searchlist_144m / sizeof(struct fd_type); 1891 break; 1892 1893 case FDT_288M: 1894 fdtp = fd_searchlist_288m; 1895 n = sizeof fd_searchlist_288m / sizeof(struct fd_type); 1896 break; 1897 } 1898 1899 /* 1900 * Try reading sector ID fields, first at cylinder 0, head 0, 1901 * then at cylinder 2, head N. We don't probe cylinder 1, 1902 * since for 5.25in DD media in a HD drive, there are no data 1903 * to read (2 step pulses per media cylinder required). For 1904 * two-sided media, the second probe always goes to head 1, so 1905 * we can tell them apart from single-sided media. As a 1906 * side-effect this means that single-sided media should be 1907 * mentioned in the search list after two-sided media of an 1908 * otherwise identical density. Media with a different number 1909 * of sectors per track but otherwise identical parameters 1910 * cannot be distinguished at all. 1911 * 1912 * If we successfully read an ID field on both cylinders where 1913 * the recorded values match our expectation, we are done. 1914 * Otherwise, we try the next density entry from the table. 1915 * 1916 * Stepping to cylinder 2 has the side-effect of clearing the 1917 * unit attention bit. 1918 */ 1919 oopts = fd->options; 1920 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY; 1921 for (i = 0; i < n; i++, fdtp++) { 1922 fd->ft = fdtp; 1923 1924 id.cyl = id.head = 0; 1925 rv = fdmisccmd(dev, FDBIO_RDSECTID, &id); 1926 if (rv != 0) 1927 continue; 1928 if (id.cyl != 0 || id.head != 0 || 1929 id.secshift != fdtp->secsize) 1930 continue; 1931 id.cyl = 2; 1932 id.head = fd->ft->heads - 1; 1933 rv = fdmisccmd(dev, FDBIO_RDSECTID, &id); 1934 if (id.cyl != 2 || id.head != fdtp->heads - 1 || 1935 id.secshift != fdtp->secsize) 1936 continue; 1937 if (rv == 0) 1938 break; 1939 } 1940 1941 fd->options = oopts; 1942 if (i == n) { 1943 if (bootverbose) 1944 device_printf(fd->dev, "autoselection failed\n"); 1945 fd->ft = 0; 1946 return (EIO); 1947 } else { 1948 if (bootverbose) 1949 device_printf(fd->dev, "autoselected %d KB medium\n", 1950 fd->ft->size / 2); 1951 return (0); 1952 } 1953 } 1954 1955 1956 /* 1957 * The controller state machine. 1958 * 1959 * If it returns a non zero value, it should be called again immediately. 1960 */ 1961 static int 1962 fdstate(fdc_p fdc) 1963 { 1964 struct fdc_readid *idp; 1965 int read, format, rdsectid, cylinder, head, i, sec = 0, sectrac; 1966 int st0, cyl, st3, idf, ne7cmd, mfm, steptrac; 1967 unsigned long blknum; 1968 fdu_t fdu = fdc->fdu; 1969 fd_p fd; 1970 register struct bio *bp; 1971 struct fd_formb *finfo = NULL; 1972 size_t fdblk; 1973 1974 bp = fdc->bp; 1975 if (bp == NULL) { 1976 bp = bioq_first(&fdc->head); 1977 if (bp != NULL) { 1978 bioq_remove(&fdc->head, bp); 1979 fdc->bp = bp; 1980 } 1981 } 1982 if (bp == NULL) { 1983 /* 1984 * Nothing left for this controller to do, 1985 * force into the IDLE state. 1986 */ 1987 fdc->state = DEVIDLE; 1988 if (fdc->fd) { 1989 device_printf(fdc->fdc_dev, 1990 "unexpected valid fd pointer\n"); 1991 fdc->fd = (fd_p) 0; 1992 fdc->fdu = -1; 1993 } 1994 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1995 return (0); 1996 } 1997 fdu = FDUNIT(minor(bp->bio_dev)); 1998 fd = devclass_get_softc(fd_devclass, fdu); 1999 fdblk = 128 << fd->ft->secsize; 2000 if (fdc->fd && (fd != fdc->fd)) 2001 device_printf(fd->dev, "confused fd pointers\n"); 2002 read = bp->bio_cmd == BIO_READ; 2003 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0; 2004 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1; 2005 if (read) 2006 idf = ISADMA_READ; 2007 else 2008 idf = ISADMA_WRITE; 2009 format = bp->bio_cmd == FDBIO_FORMAT; 2010 rdsectid = bp->bio_cmd == FDBIO_RDSECTID; 2011 if (format) 2012 finfo = (struct fd_formb *)bp->bio_data; 2013 TRACE1("fd%d", fdu); 2014 TRACE1("[%s]", fdstates[fdc->state]); 2015 TRACE1("(0x%x)", fd->flags); 2016 untimeout(fd_turnoff, fd, fd->toffhandle); 2017 fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz); 2018 switch (fdc->state) 2019 { 2020 case DEVIDLE: 2021 case FINDWORK: /* we have found new work */ 2022 fdc->retry = 0; 2023 fd->skip = 0; 2024 fdc->fd = fd; 2025 fdc->fdu = fdu; 2026 fdc->fdctl_wr(fdc, fd->ft->trans); 2027 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 2028 /* 2029 * If the next drive has a motor startup pending, then 2030 * it will start up in its own good time. 2031 */ 2032 if(fd->flags & FD_MOTOR_WAIT) { 2033 fdc->state = MOTORWAIT; 2034 return (0); /* will return later */ 2035 } 2036 /* 2037 * Maybe if it's not starting, it SHOULD be starting. 2038 */ 2039 if (!(fd->flags & FD_MOTOR)) 2040 { 2041 fdc->state = MOTORWAIT; 2042 fd_turnon(fd); 2043 return (0); /* will return later */ 2044 } 2045 else /* at least make sure we are selected */ 2046 { 2047 set_motor(fdc, fd->fdsu, TURNON); 2048 } 2049 if (fdc->flags & FDC_NEEDS_RESET) { 2050 fdc->state = RESETCTLR; 2051 fdc->flags &= ~FDC_NEEDS_RESET; 2052 } else 2053 fdc->state = DOSEEK; 2054 return (1); /* will return immediately */ 2055 2056 case DOSEEK: 2057 blknum = bp->bio_pblkno + fd->skip / fdblk; 2058 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 2059 if (cylinder == fd->track) 2060 { 2061 fdc->state = SEEKCOMPLETE; 2062 return (1); /* will return immediately */ 2063 } 2064 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 2065 fd->fdsu, cylinder * steptrac, 0)) 2066 { 2067 /* 2068 * Seek command not accepted, looks like 2069 * the FDC went off to the Saints... 2070 */ 2071 fdc->retry = 6; /* try a reset */ 2072 return(retrier(fdc)); 2073 } 2074 fd->track = FD_NO_TRACK; 2075 fdc->state = SEEKWAIT; 2076 return(0); /* will return later */ 2077 2078 case SEEKWAIT: 2079 /* allow heads to settle */ 2080 timeout(fd_pseudointr, fdc, hz / 16); 2081 fdc->state = SEEKCOMPLETE; 2082 return(0); /* will return later */ 2083 2084 case SEEKCOMPLETE : /* seek done, start DMA */ 2085 blknum = bp->bio_pblkno + fd->skip / fdblk; 2086 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 2087 2088 /* Make sure seek really happened. */ 2089 if(fd->track == FD_NO_TRACK) { 2090 int descyl = cylinder * steptrac; 2091 do { 2092 /* 2093 * This might be a "ready changed" interrupt, 2094 * which cannot really happen since the 2095 * RDY pin is hardwired to + 5 volts. This 2096 * generally indicates a "bouncing" intr 2097 * line, so do one of the following: 2098 * 2099 * When running on an enhanced FDC that is 2100 * known to not go stuck after responding 2101 * with INVALID, fetch all interrupt states 2102 * until seeing either an INVALID or a 2103 * real interrupt condition. 2104 * 2105 * When running on a dumb old NE765, give 2106 * up immediately. The controller will 2107 * provide up to four dummy RC interrupt 2108 * conditions right after reset (for the 2109 * corresponding four drives), so this is 2110 * our only chance to get notice that it 2111 * was not the FDC that caused the interrupt. 2112 */ 2113 if (fd_sense_int(fdc, &st0, &cyl) 2114 == FD_NOT_VALID) 2115 return (0); /* will return later */ 2116 if(fdc->fdct == FDC_NE765 2117 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2118 return (0); /* hope for a real intr */ 2119 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2120 2121 if (0 == descyl) { 2122 int failed = 0; 2123 /* 2124 * seek to cyl 0 requested; make sure we are 2125 * really there 2126 */ 2127 if (fd_sense_drive_status(fdc, &st3)) 2128 failed = 1; 2129 if ((st3 & NE7_ST3_T0) == 0) { 2130 printf( 2131 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 2132 fdu, st3, NE7_ST3BITS); 2133 failed = 1; 2134 } 2135 2136 if (failed) { 2137 if(fdc->retry < 3) 2138 fdc->retry = 3; 2139 return (retrier(fdc)); 2140 } 2141 } 2142 2143 if (cyl != descyl) { 2144 printf( 2145 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 2146 fdu, descyl, cyl, st0); 2147 if (fdc->retry < 3) 2148 fdc->retry = 3; 2149 return (retrier(fdc)); 2150 } 2151 } 2152 2153 fd->track = cylinder; 2154 if (format) 2155 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 2156 - (char *)finfo; 2157 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2158 isa_dmastart(idf, bp->bio_data+fd->skip, 2159 format ? bp->bio_bcount : fdblk, fdc->dmachan); 2160 blknum = bp->bio_pblkno + fd->skip / fdblk; 2161 sectrac = fd->ft->sectrac; 2162 sec = blknum % (sectrac * fd->ft->heads); 2163 head = sec / sectrac; 2164 sec = sec % sectrac + 1; 2165 if (head != 0 && fd->ft->offset_side2 != 0) 2166 sec += fd->ft->offset_side2; 2167 fd->hddrv = ((head&1)<<2)+fdu; 2168 2169 if(format || !(read || rdsectid)) 2170 { 2171 /* make sure the drive is writable */ 2172 if(fd_sense_drive_status(fdc, &st3) != 0) 2173 { 2174 /* stuck controller? */ 2175 if (!(fdc->flags & FDC_NODMA)) 2176 isa_dmadone(idf, 2177 bp->bio_data + fd->skip, 2178 format ? bp->bio_bcount : fdblk, 2179 fdc->dmachan); 2180 fdc->retry = 6; /* reset the beast */ 2181 return (retrier(fdc)); 2182 } 2183 if(st3 & NE7_ST3_WP) 2184 { 2185 /* 2186 * XXX YES! this is ugly. 2187 * in order to force the current operation 2188 * to fail, we will have to fake an FDC 2189 * error - all error handling is done 2190 * by the retrier() 2191 */ 2192 fdc->status[0] = NE7_ST0_IC_AT; 2193 fdc->status[1] = NE7_ST1_NW; 2194 fdc->status[2] = 0; 2195 fdc->status[3] = fd->track; 2196 fdc->status[4] = head; 2197 fdc->status[5] = sec; 2198 fdc->retry = 8; /* break out immediately */ 2199 fdc->state = IOTIMEDOUT; /* not really... */ 2200 return (1); /* will return immediately */ 2201 } 2202 } 2203 2204 if (format) { 2205 ne7cmd = NE7CMD_FORMAT | mfm; 2206 if (fdc->flags & FDC_NODMA) { 2207 /* 2208 * This seems to be necessary for 2209 * whatever obscure reason; if we omit 2210 * it, we end up filling the sector ID 2211 * fields of the newly formatted track 2212 * entirely with garbage, causing 2213 * `wrong cylinder' errors all over 2214 * the place when trying to read them 2215 * back. 2216 * 2217 * Umpf. 2218 */ 2219 SET_BCDR(fdc, 1, bp->bio_bcount, 0); 2220 2221 (void)fdcpio(fdc,bp->bio_cmd, 2222 bp->bio_data+fd->skip, 2223 bp->bio_bcount); 2224 2225 } 2226 /* formatting */ 2227 if(fd_cmd(fdc, 6, ne7cmd, head << 2 | fdu, 2228 finfo->fd_formb_secshift, 2229 finfo->fd_formb_nsecs, 2230 finfo->fd_formb_gaplen, 2231 finfo->fd_formb_fillbyte, 0)) { 2232 /* controller fell over */ 2233 if (!(fdc->flags & FDC_NODMA)) 2234 isa_dmadone(idf, 2235 bp->bio_data + fd->skip, 2236 format ? bp->bio_bcount : fdblk, 2237 fdc->dmachan); 2238 fdc->retry = 6; 2239 return (retrier(fdc)); 2240 } 2241 } else if (rdsectid) { 2242 ne7cmd = NE7CMD_READID | mfm; 2243 if (fd_cmd(fdc, 2, ne7cmd, head << 2 | fdu, 0)) { 2244 /* controller jamming */ 2245 fdc->retry = 6; 2246 return (retrier(fdc)); 2247 } 2248 } else { 2249 /* read or write operation */ 2250 ne7cmd = (read ? NE7CMD_READ | NE7CMD_SK : NE7CMD_WRITE) | mfm; 2251 if (fdc->flags & FDC_NODMA) { 2252 /* 2253 * This seems to be necessary even when 2254 * reading data. 2255 */ 2256 SET_BCDR(fdc, 1, fdblk, 0); 2257 2258 /* 2259 * Perform the write pseudo-DMA before 2260 * the WRITE command is sent. 2261 */ 2262 if (!read) 2263 (void)fdcpio(fdc,bp->bio_cmd, 2264 bp->bio_data+fd->skip, 2265 fdblk); 2266 } 2267 if (fd_cmd(fdc, 9, 2268 ne7cmd, 2269 head << 2 | fdu, /* head & unit */ 2270 fd->track, /* track */ 2271 head, 2272 sec, /* sector + 1 */ 2273 fd->ft->secsize, /* sector size */ 2274 sectrac, /* sectors/track */ 2275 fd->ft->gap, /* gap size */ 2276 fd->ft->datalen, /* data length */ 2277 0)) { 2278 /* the beast is sleeping again */ 2279 if (!(fdc->flags & FDC_NODMA)) 2280 isa_dmadone(idf, 2281 bp->bio_data + fd->skip, 2282 format ? bp->bio_bcount : fdblk, 2283 fdc->dmachan); 2284 fdc->retry = 6; 2285 return (retrier(fdc)); 2286 } 2287 } 2288 if (!rdsectid && (fdc->flags & FDC_NODMA)) 2289 /* 2290 * If this is a read, then simply await interrupt 2291 * before performing PIO. 2292 */ 2293 if (read && !fdcpio(fdc,bp->bio_cmd, 2294 bp->bio_data+fd->skip,fdblk)) { 2295 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2296 return(0); /* will return later */ 2297 } 2298 2299 /* 2300 * Write (or format) operation will fall through and 2301 * await completion interrupt. 2302 */ 2303 fdc->state = IOCOMPLETE; 2304 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2305 return (0); /* will return later */ 2306 2307 case PIOREAD: 2308 /* 2309 * Actually perform the PIO read. The IOCOMPLETE case 2310 * removes the timeout for us. 2311 */ 2312 (void)fdcpio(fdc,bp->bio_cmd,bp->bio_data+fd->skip,fdblk); 2313 fdc->state = IOCOMPLETE; 2314 /* FALLTHROUGH */ 2315 case IOCOMPLETE: /* IO done, post-analyze */ 2316 untimeout(fd_iotimeout, fdc, fd->tohandle); 2317 2318 if (fd_read_status(fdc)) { 2319 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2320 isa_dmadone(idf, bp->bio_data + fd->skip, 2321 format ? bp->bio_bcount : fdblk, 2322 fdc->dmachan); 2323 if (fdc->retry < 6) 2324 fdc->retry = 6; /* force a reset */ 2325 return (retrier(fdc)); 2326 } 2327 2328 fdc->state = IOTIMEDOUT; 2329 2330 /* FALLTHROUGH */ 2331 case IOTIMEDOUT: 2332 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2333 isa_dmadone(idf, bp->bio_data + fd->skip, 2334 format ? bp->bio_bcount : fdblk, fdc->dmachan); 2335 if (fdc->status[0] & NE7_ST0_IC) { 2336 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2337 && fdc->status[1] & NE7_ST1_OR) { 2338 /* 2339 * DMA overrun. Someone hogged the bus and 2340 * didn't release it in time for the next 2341 * FDC transfer. 2342 * 2343 * We normally restart this without bumping 2344 * the retry counter. However, in case 2345 * something is seriously messed up (like 2346 * broken hardware), we rather limit the 2347 * number of retries so the IO operation 2348 * doesn't block indefinately. 2349 */ 2350 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 2351 fdc->state = SEEKCOMPLETE; 2352 return (1);/* will return immediately */ 2353 } /* else fall through */ 2354 } 2355 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 2356 && fdc->retry < 6) 2357 fdc->retry = 6; /* force a reset */ 2358 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2359 && fdc->status[2] & NE7_ST2_WC 2360 && fdc->retry < 3) 2361 fdc->retry = 3; /* force recalibrate */ 2362 return (retrier(fdc)); 2363 } 2364 /* All OK */ 2365 if (rdsectid) { 2366 /* copy out ID field contents */ 2367 idp = (struct fdc_readid *)bp->bio_data; 2368 idp->cyl = fdc->status[3]; 2369 idp->head = fdc->status[4]; 2370 idp->sec = fdc->status[5]; 2371 idp->secshift = fdc->status[6]; 2372 } 2373 /* Operation successful, retry DMA overruns again next time. */ 2374 fdc->dma_overruns = 0; 2375 fd->skip += fdblk; 2376 if (!rdsectid && !format && fd->skip < bp->bio_bcount) { 2377 /* set up next transfer */ 2378 fdc->state = DOSEEK; 2379 } else { 2380 /* ALL DONE */ 2381 fd->skip = 0; 2382 bp->bio_resid = 0; 2383 fdc->bp = NULL; 2384 device_unbusy(fd->dev); 2385 biofinish(bp, fd->device_stats, 0); 2386 fdc->fd = (fd_p) 0; 2387 fdc->fdu = -1; 2388 fdc->state = FINDWORK; 2389 } 2390 return (1); /* will return immediately */ 2391 2392 case RESETCTLR: 2393 fdc_reset(fdc); 2394 fdc->retry++; 2395 fdc->state = RESETCOMPLETE; 2396 return (0); /* will return later */ 2397 2398 case RESETCOMPLETE: 2399 /* 2400 * Discard all the results from the reset so that they 2401 * can't cause an unexpected interrupt later. 2402 */ 2403 for (i = 0; i < 4; i++) 2404 (void)fd_sense_int(fdc, &st0, &cyl); 2405 fdc->state = STARTRECAL; 2406 /* FALLTHROUGH */ 2407 case STARTRECAL: 2408 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 2409 /* arrgl */ 2410 fdc->retry = 6; 2411 return (retrier(fdc)); 2412 } 2413 fdc->state = RECALWAIT; 2414 return (0); /* will return later */ 2415 2416 case RECALWAIT: 2417 /* allow heads to settle */ 2418 timeout(fd_pseudointr, fdc, hz / 8); 2419 fdc->state = RECALCOMPLETE; 2420 return (0); /* will return later */ 2421 2422 case RECALCOMPLETE: 2423 do { 2424 /* 2425 * See SEEKCOMPLETE for a comment on this: 2426 */ 2427 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2428 return (0); /* will return later */ 2429 if(fdc->fdct == FDC_NE765 2430 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2431 return (0); /* hope for a real intr */ 2432 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2433 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2434 { 2435 if(fdc->retry > 3) 2436 /* 2437 * A recalibrate from beyond cylinder 77 2438 * will "fail" due to the FDC limitations; 2439 * since people used to complain much about 2440 * the failure message, try not logging 2441 * this one if it seems to be the first 2442 * time in a line. 2443 */ 2444 printf("fd%d: recal failed ST0 %b cyl %d\n", 2445 fdu, st0, NE7_ST0BITS, cyl); 2446 if(fdc->retry < 3) fdc->retry = 3; 2447 return (retrier(fdc)); 2448 } 2449 fd->track = 0; 2450 /* Seek (probably) necessary */ 2451 fdc->state = DOSEEK; 2452 return (1); /* will return immediately */ 2453 2454 case MOTORWAIT: 2455 if(fd->flags & FD_MOTOR_WAIT) 2456 { 2457 return (0); /* time's not up yet */ 2458 } 2459 if (fdc->flags & FDC_NEEDS_RESET) { 2460 fdc->state = RESETCTLR; 2461 fdc->flags &= ~FDC_NEEDS_RESET; 2462 } else 2463 fdc->state = DOSEEK; 2464 return (1); /* will return immediately */ 2465 2466 default: 2467 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2468 if (fd_read_status(fdc) == 0) 2469 printf("FDC status :%x %x %x %x %x %x %x ", 2470 fdc->status[0], 2471 fdc->status[1], 2472 fdc->status[2], 2473 fdc->status[3], 2474 fdc->status[4], 2475 fdc->status[5], 2476 fdc->status[6] ); 2477 else 2478 printf("No status available "); 2479 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2480 { 2481 printf("[controller is dead now]\n"); 2482 return (0); /* will return later */ 2483 } 2484 printf("ST0 = %x, PCN = %x\n", st0, cyl); 2485 return (0); /* will return later */ 2486 } 2487 /* noone should ever get here */ 2488 } 2489 2490 static int 2491 retrier(struct fdc_data *fdc) 2492 { 2493 struct bio *bp; 2494 struct fd_data *fd; 2495 int fdu; 2496 2497 bp = fdc->bp; 2498 2499 /* XXX shouldn't this be cached somewhere? */ 2500 fdu = FDUNIT(minor(bp->bio_dev)); 2501 fd = devclass_get_softc(fd_devclass, fdu); 2502 if (fd->options & FDOPT_NORETRY) 2503 goto fail; 2504 2505 switch (fdc->retry) { 2506 case 0: case 1: case 2: 2507 fdc->state = SEEKCOMPLETE; 2508 break; 2509 case 3: case 4: case 5: 2510 fdc->state = STARTRECAL; 2511 break; 2512 case 6: 2513 fdc->state = RESETCTLR; 2514 break; 2515 case 7: 2516 break; 2517 default: 2518 fail: 2519 if ((fd->options & FDOPT_NOERRLOG) == 0) { 2520 disk_err(bp, "hard error", 2521 fdc->fd->skip / DEV_BSIZE, 0); 2522 if (fdc->flags & FDC_STAT_VALID) { 2523 printf( 2524 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2525 fdc->status[0], NE7_ST0BITS, 2526 fdc->status[1], NE7_ST1BITS, 2527 fdc->status[2], NE7_ST2BITS, 2528 fdc->status[3], fdc->status[4], 2529 fdc->status[5]); 2530 } 2531 else 2532 printf(" (No status)\n"); 2533 } 2534 if ((fd->options & FDOPT_NOERROR) == 0) { 2535 bp->bio_flags |= BIO_ERROR; 2536 bp->bio_error = EIO; 2537 bp->bio_resid = bp->bio_bcount - fdc->fd->skip; 2538 } else 2539 bp->bio_resid = 0; 2540 fdc->bp = NULL; 2541 fdc->fd->skip = 0; 2542 device_unbusy(fd->dev); 2543 biofinish(bp, fdc->fd->device_stats, 0); 2544 fdc->state = FINDWORK; 2545 fdc->flags |= FDC_NEEDS_RESET; 2546 fdc->fd = (fd_p) 0; 2547 fdc->fdu = -1; 2548 return (1); 2549 } 2550 fdc->retry++; 2551 return (1); 2552 } 2553 2554 static void 2555 fdbiodone(struct bio *bp) 2556 { 2557 wakeup(bp); 2558 } 2559 2560 static int 2561 fdmisccmd(dev_t dev, u_int cmd, void *data) 2562 { 2563 fdu_t fdu; 2564 fd_p fd; 2565 struct bio *bp; 2566 struct fd_formb *finfo; 2567 struct fdc_readid *idfield; 2568 size_t fdblk; 2569 int error; 2570 2571 fdu = FDUNIT(minor(dev)); 2572 fd = devclass_get_softc(fd_devclass, fdu); 2573 fdblk = 128 << fd->ft->secsize; 2574 finfo = (struct fd_formb *)data; 2575 idfield = (struct fdc_readid *)data; 2576 2577 bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO); 2578 2579 /* 2580 * Set up a bio request for fdstrategy(). bio_blkno is faked 2581 * so that fdstrategy() will seek to the the requested 2582 * cylinder, and use the desired head. 2583 */ 2584 bp->bio_cmd = cmd; 2585 if (cmd == FDBIO_FORMAT) { 2586 bp->bio_blkno = 2587 (finfo->cyl * (fd->ft->sectrac * fd->ft->heads) + 2588 finfo->head * fd->ft->sectrac) * 2589 fdblk / DEV_BSIZE; 2590 bp->bio_bcount = sizeof(struct fd_idfield_data) * 2591 finfo->fd_formb_nsecs; 2592 } else if (cmd == FDBIO_RDSECTID) { 2593 bp->bio_blkno = 2594 (idfield->cyl * (fd->ft->sectrac * fd->ft->heads) + 2595 idfield->head * fd->ft->sectrac) * 2596 fdblk / DEV_BSIZE; 2597 bp->bio_bcount = sizeof(struct fdc_readid); 2598 } else 2599 panic("wrong cmd in fdmisccmd()"); 2600 bp->bio_data = data; 2601 bp->bio_dev = dev; 2602 bp->bio_done = fdbiodone; 2603 bp->bio_flags = 0; 2604 2605 /* Now run the command. */ 2606 fdstrategy(bp); 2607 error = biowait(bp, "fdcmd"); 2608 2609 free(bp, M_TEMP); 2610 return (error); 2611 } 2612 2613 static int 2614 fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 2615 { 2616 fdu_t fdu; 2617 fd_p fd; 2618 struct fdc_status *fsp; 2619 struct fdc_readid *rid; 2620 int error, type; 2621 2622 fdu = FDUNIT(minor(dev)); 2623 type = FDTYPE(minor(dev)); 2624 fd = devclass_get_softc(fd_devclass, fdu); 2625 2626 /* 2627 * First, handle everything that could be done with 2628 * FD_NONBLOCK still being set. 2629 */ 2630 switch (cmd) { 2631 2632 case DIOCGMEDIASIZE: 2633 if (fd->ft == 0) 2634 return ((fd->flags & FD_NONBLOCK) ? EAGAIN : ENXIO); 2635 *(off_t *)addr = (128 << (fd->ft->secsize)) * fd->ft->size; 2636 return (0); 2637 2638 case DIOCGSECTORSIZE: 2639 if (fd->ft == 0) 2640 return ((fd->flags & FD_NONBLOCK) ? EAGAIN : ENXIO); 2641 *(u_int *)addr = 128 << (fd->ft->secsize); 2642 return (0); 2643 2644 case FIONBIO: 2645 if (*(int *)addr != 0) 2646 fd->flags |= FD_NONBLOCK; 2647 else { 2648 if (fd->ft == 0) { 2649 /* 2650 * No drive type has been selected yet, 2651 * cannot turn FNONBLOCK off. 2652 */ 2653 return (EINVAL); 2654 } 2655 fd->flags &= ~FD_NONBLOCK; 2656 } 2657 return (0); 2658 2659 case FIOASYNC: 2660 /* keep the generic fcntl() code happy */ 2661 return (0); 2662 2663 case FD_GTYPE: /* get drive type */ 2664 if (fd->ft == 0) 2665 /* no type known yet, return the native type */ 2666 *(struct fd_type *)addr = fd_native_types[fd->type]; 2667 else 2668 *(struct fd_type *)addr = *fd->ft; 2669 return (0); 2670 2671 case FD_STYPE: /* set drive type */ 2672 if (type == 0) { 2673 /* 2674 * Allow setting drive type temporarily iff 2675 * currently unset. Used for fdformat so any 2676 * user can set it, and then start formatting. 2677 */ 2678 if (fd->ft) 2679 return (EINVAL); /* already set */ 2680 fd->ft = fd->fts; 2681 *fd->ft = *(struct fd_type *)addr; 2682 fd->flags |= FD_UA; 2683 } else { 2684 /* 2685 * Set density definition permanently. Only 2686 * allow for superuser. 2687 */ 2688 if (suser(td) != 0) 2689 return (EPERM); 2690 fd->fts[type] = *(struct fd_type *)addr; 2691 } 2692 return (0); 2693 2694 case FD_GOPTS: /* get drive options */ 2695 *(int *)addr = fd->options + (type == 0? FDOPT_AUTOSEL: 0); 2696 return (0); 2697 2698 case FD_SOPTS: /* set drive options */ 2699 fd->options = *(int *)addr & ~FDOPT_AUTOSEL; 2700 return (0); 2701 2702 #ifdef FDC_DEBUG 2703 case FD_DEBUG: 2704 if ((fd_debug != 0) != (*(int *)addr != 0)) { 2705 fd_debug = (*(int *)addr != 0); 2706 printf("fd%d: debugging turned %s\n", 2707 fd->fdu, fd_debug ? "on" : "off"); 2708 } 2709 return (0); 2710 #endif 2711 2712 case FD_CLRERR: 2713 if (suser(td) != 0) 2714 return (EPERM); 2715 fd->fdc->fdc_errs = 0; 2716 return (0); 2717 2718 case FD_GSTAT: 2719 fsp = (struct fdc_status *)addr; 2720 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2721 return (EINVAL); 2722 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2723 return (0); 2724 2725 case FD_GDTYPE: 2726 *(enum fd_drivetype *)addr = fd->type; 2727 return (0); 2728 } 2729 2730 /* 2731 * Now handle everything else. Make sure we have a valid 2732 * drive type. 2733 */ 2734 if (fd->flags & FD_NONBLOCK) 2735 return (EAGAIN); 2736 if (fd->ft == 0) 2737 return (ENXIO); 2738 error = 0; 2739 2740 switch (cmd) { 2741 2742 case FD_FORM: 2743 if ((flag & FWRITE) == 0) 2744 return (EBADF); /* must be opened for writing */ 2745 if (((struct fd_formb *)addr)->format_version != 2746 FD_FORMAT_VERSION) 2747 return (EINVAL); /* wrong version of formatting prog */ 2748 error = fdmisccmd(dev, FDBIO_FORMAT, addr); 2749 break; 2750 2751 case FD_GTYPE: /* get drive type */ 2752 *(struct fd_type *)addr = *fd->ft; 2753 break; 2754 2755 case FD_STYPE: /* set drive type */ 2756 /* this is considered harmful; only allow for superuser */ 2757 if (suser(td) != 0) 2758 return (EPERM); 2759 *fd->ft = *(struct fd_type *)addr; 2760 break; 2761 2762 case FD_GOPTS: /* get drive options */ 2763 *(int *)addr = fd->options; 2764 break; 2765 2766 case FD_SOPTS: /* set drive options */ 2767 fd->options = *(int *)addr; 2768 break; 2769 2770 #ifdef FDC_DEBUG 2771 case FD_DEBUG: 2772 if ((fd_debug != 0) != (*(int *)addr != 0)) { 2773 fd_debug = (*(int *)addr != 0); 2774 printf("fd%d: debugging turned %s\n", 2775 fd->fdu, fd_debug ? "on" : "off"); 2776 } 2777 break; 2778 #endif 2779 2780 case FD_CLRERR: 2781 if (suser(td) != 0) 2782 return (EPERM); 2783 fd->fdc->fdc_errs = 0; 2784 break; 2785 2786 case FD_GSTAT: 2787 fsp = (struct fdc_status *)addr; 2788 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2789 return (EINVAL); 2790 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2791 break; 2792 2793 case FD_READID: 2794 rid = (struct fdc_readid *)addr; 2795 if (rid->cyl > MAX_CYLINDER || rid->head > MAX_HEAD) 2796 return (EINVAL); 2797 error = fdmisccmd(dev, FDBIO_RDSECTID, addr); 2798 break; 2799 2800 default: 2801 error = ENOTTY; 2802 break; 2803 } 2804 return (error); 2805 } 2806