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sys/isa/fd.c
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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: releng/5.1/sys/isa/fd.c 112946 2003-04-01 15:06:26Z phk $ 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/disk.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 FDBIO_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 * Timeout value for the PIO loops to wait until the FDC main status 217 * register matches our expectations (request for master, direction 218 * bit). This is supposed to be a number of microseconds, although 219 * timing might actually not be very accurate. 220 * 221 * Timeouts of 100 msec are believed to be required for some broken 222 * (old) hardware. 223 */ 224 #define FDSTS_TIMEOUT 100000 225 226 /* 227 * Number of subdevices that can be used for different density types. 228 * By now, the lower 6 bit of the minor number are reserved for this, 229 * allowing for up to 64 subdevices, but we only use 16 out of this. 230 * Density #0 is used for automatic format detection, the other 231 * densities are available as programmable densities (for assignment 232 * by fdcontrol(8)). 233 * The upper 2 bits of the minor number are reserved for the subunit 234 * (drive #) per controller. 235 */ 236 #define NUMDENS 16 237 238 #define FDBIO_RDSECTID BIO_CMD1 239 240 /* 241 * List of native drive densities. Order must match enum fd_drivetype 242 * in <sys/fdcio.h>. Upon attaching the drive, each of the 243 * programmable subdevices is initialized with the native density 244 * definition. 245 */ 246 static struct fd_type fd_native_types[] = 247 { 248 { 0 }, /* FDT_NONE */ 249 { 9,2,0xFF,0x2A,40, 720,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_360K */ 250 { 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* FDT_12M */ 251 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_720K */ 252 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */ 253 #if 0 /* we currently don't handle 2.88 MB */ 254 { 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /*FDT_288M*/ 255 #else 256 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */ 257 #endif 258 }; 259 260 /* 261 * 360 KB 5.25" and 720 KB 3.5" drives don't have automatic density 262 * selection, they just start out with their native density (or lose). 263 * So 1.2 MB 5.25", 1.44 MB 3.5", and 2.88 MB 3.5" drives have their 264 * respective lists of densities to search for. 265 */ 266 static struct fd_type fd_searchlist_12m[] = { 267 { 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* 1.2M */ 268 { 9,2,0xFF,0x23,40, 720,FDC_300KBPS,2,0x50,1,0,FL_MFM|FL_2STEP }, /* 360K */ 269 { 9,2,0xFF,0x20,80,1440,FDC_300KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 270 }; 271 272 static struct fd_type fd_searchlist_144m[] = { 273 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */ 274 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 275 }; 276 277 /* We search for 1.44M first since this is the most common case. */ 278 static struct fd_type fd_searchlist_288m[] = { 279 { 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */ 280 #if 0 281 { 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /* 2.88M */ 282 #endif 283 { 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 284 }; 285 286 #define MAX_SEC_SIZE (128 << 3) 287 #define MAX_CYLINDER 85 /* some people really stress their drives 288 * up to cyl 82 */ 289 #define MAX_HEAD 1 290 291 static devclass_t fdc_devclass; 292 293 /* 294 * Per drive structure (softc). 295 */ 296 struct fd_data { 297 struct fdc_data *fdc; /* pointer to controller structure */ 298 int fdsu; /* this units number on this controller */ 299 enum fd_drivetype type; /* drive type */ 300 struct fd_type *ft; /* pointer to current type descriptor */ 301 struct fd_type fts[NUMDENS]; /* type descriptors */ 302 int flags; 303 #define FD_OPEN 0x01 /* it's open */ 304 #define FD_NONBLOCK 0x02 /* O_NONBLOCK set */ 305 #define FD_ACTIVE 0x04 /* it's active */ 306 #define FD_MOTOR 0x08 /* motor should be on */ 307 #define FD_MOTOR_WAIT 0x10 /* motor coming up */ 308 #define FD_UA 0x20 /* force unit attention */ 309 int skip; 310 int hddrv; 311 #define FD_NO_TRACK -2 312 int track; /* where we think the head is */ 313 int options; /* user configurable options, see fdcio.h */ 314 struct callout_handle toffhandle; 315 struct callout_handle tohandle; 316 struct devstat *device_stats; 317 eventhandler_tag clonetag; 318 dev_t masterdev; 319 dev_t clonedevs[NUMDENS - 1]; 320 device_t dev; 321 fdu_t fdu; 322 }; 323 324 struct fdc_ivars { 325 int fdunit; 326 }; 327 static devclass_t fd_devclass; 328 329 /* configuration flags for fd */ 330 #define FD_TYPEMASK 0x0f /* drive type, matches enum 331 * fd_drivetype; on i386 machines, if 332 * given as 0, use RTC type for fd0 333 * and fd1 */ 334 #define FD_DTYPE(flags) ((flags) & FD_TYPEMASK) 335 #define FD_NO_CHLINE 0x10 /* drive does not support changeline 336 * aka. unit attention */ 337 #define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just 338 * assume it is there */ 339 340 /* 341 * Throughout this file the following conventions will be used: 342 * 343 * fd is a pointer to the fd_data struct for the drive in question 344 * fdc is a pointer to the fdc_data struct for the controller 345 * fdu is the floppy drive unit number 346 * fdcu is the floppy controller unit number 347 * fdsu is the floppy drive unit number on that controller. (sub-unit) 348 */ 349 350 /* 351 * Function declarations, same (chaotic) order as they appear in the 352 * file. Re-ordering is too late now, it would only obfuscate the 353 * diffs against old and offspring versions (like the PC98 one). 354 * 355 * Anyone adding functions here, please keep this sequence the same 356 * as below -- makes locating a particular function in the body much 357 * easier. 358 */ 359 static void fdout_wr(fdc_p, u_int8_t); 360 static u_int8_t fdsts_rd(fdc_p); 361 static void fddata_wr(fdc_p, u_int8_t); 362 static u_int8_t fddata_rd(fdc_p); 363 static void fdctl_wr_isa(fdc_p, u_int8_t); 364 #if NCARD > 0 365 static void fdctl_wr_pcmcia(fdc_p, u_int8_t); 366 #endif 367 #if 0 368 static u_int8_t fdin_rd(fdc_p); 369 #endif 370 static int fdc_err(struct fdc_data *, const char *); 371 static int fd_cmd(struct fdc_data *, int, ...); 372 static int enable_fifo(fdc_p fdc); 373 static int fd_sense_drive_status(fdc_p, int *); 374 static int fd_sense_int(fdc_p, int *, int *); 375 static int fd_read_status(fdc_p); 376 static int fdc_alloc_resources(struct fdc_data *); 377 static void fdc_release_resources(struct fdc_data *); 378 static int fdc_read_ivar(device_t, device_t, int, uintptr_t *); 379 static int fdc_probe(device_t); 380 #if NCARD > 0 381 static int fdc_pccard_probe(device_t); 382 #endif 383 static int fdc_detach(device_t dev); 384 static void fdc_add_child(device_t, const char *, int); 385 static int fdc_attach(device_t); 386 static int fdc_print_child(device_t, device_t); 387 static void fd_clone (void *, char *, int, dev_t *); 388 static int fd_probe(device_t); 389 static int fd_attach(device_t); 390 static int fd_detach(device_t); 391 static void set_motor(struct fdc_data *, int, int); 392 # define TURNON 1 393 # define TURNOFF 0 394 static timeout_t fd_turnoff; 395 static timeout_t fd_motor_on; 396 static void fd_turnon(struct fd_data *); 397 static void fdc_reset(fdc_p); 398 static int fd_in(struct fdc_data *, int *); 399 static int out_fdc(struct fdc_data *, int); 400 /* 401 * The open function is named Fdopen() to avoid confusion with fdopen() 402 * in fd(4). The difference is now only meaningful for debuggers. 403 */ 404 static d_open_t Fdopen; 405 static d_close_t fdclose; 406 static d_strategy_t fdstrategy; 407 static void fdstart(struct fdc_data *); 408 static timeout_t fd_iotimeout; 409 static timeout_t fd_pseudointr; 410 static driver_intr_t fdc_intr; 411 static int fdcpio(fdc_p, long, caddr_t, u_int); 412 static int fdautoselect(dev_t); 413 static int fdstate(struct fdc_data *); 414 static int retrier(struct fdc_data *); 415 static void fdbiodone(struct bio *); 416 static int fdmisccmd(dev_t, u_int, void *); 417 static d_ioctl_t fdioctl; 418 419 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 420 421 #ifdef FDC_DEBUG 422 /* CAUTION: fd_debug causes huge amounts of logging output */ 423 static int volatile fd_debug = 0; 424 #define TRACE0(arg) do { if (fd_debug) printf(arg); } while (0) 425 #define TRACE1(arg1, arg2) do { if (fd_debug) printf(arg1, arg2); } while (0) 426 #else /* FDC_DEBUG */ 427 #define TRACE0(arg) do { } while (0) 428 #define TRACE1(arg1, arg2) do { } while (0) 429 #endif /* FDC_DEBUG */ 430 431 /* 432 * Bus space handling (access to low-level IO). 433 */ 434 static void 435 fdout_wr(fdc_p fdc, u_int8_t v) 436 { 437 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 438 } 439 440 static u_int8_t 441 fdsts_rd(fdc_p fdc) 442 { 443 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 444 } 445 446 static void 447 fddata_wr(fdc_p fdc, u_int8_t v) 448 { 449 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 450 } 451 452 static u_int8_t 453 fddata_rd(fdc_p fdc) 454 { 455 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 456 } 457 458 static void 459 fdctl_wr_isa(fdc_p fdc, u_int8_t v) 460 { 461 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 462 } 463 464 #if NCARD > 0 465 static void 466 fdctl_wr_pcmcia(fdc_p fdc, u_int8_t v) 467 { 468 bus_space_write_1(fdc->portt, fdc->porth, FDCTL+fdc->port_off, v); 469 } 470 #endif 471 472 static u_int8_t 473 fdin_rd(fdc_p fdc) 474 { 475 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 476 } 477 478 #define CDEV_MAJOR 9 479 static struct cdevsw fd_cdevsw = { 480 .d_open = Fdopen, 481 .d_close = fdclose, 482 .d_read = physread, 483 .d_write = physwrite, 484 .d_ioctl = fdioctl, 485 .d_strategy = fdstrategy, 486 .d_name = "fd", 487 .d_maj = CDEV_MAJOR, 488 .d_flags = D_DISK, 489 }; 490 491 /* 492 * Auxiliary functions. Well, some only. Others are scattered 493 * throughout the entire file. 494 */ 495 static int 496 fdc_err(struct fdc_data *fdc, const char *s) 497 { 498 fdc->fdc_errs++; 499 if (s) { 500 if (fdc->fdc_errs < FDC_ERRMAX) 501 device_printf(fdc->fdc_dev, "%s", s); 502 else if (fdc->fdc_errs == FDC_ERRMAX) 503 device_printf(fdc->fdc_dev, "too many errors, not " 504 "logging any more\n"); 505 } 506 507 return FD_FAILED; 508 } 509 510 /* 511 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 512 * Unit number, 513 * # of output bytes, output bytes as ints ..., 514 * # of input bytes, input bytes as ints ... 515 */ 516 static int 517 fd_cmd(struct fdc_data *fdc, int n_out, ...) 518 { 519 u_char cmd; 520 int n_in; 521 int n; 522 va_list ap; 523 524 va_start(ap, n_out); 525 cmd = (u_char)(va_arg(ap, int)); 526 va_end(ap); 527 va_start(ap, n_out); 528 for (n = 0; n < n_out; n++) 529 { 530 if (out_fdc(fdc, va_arg(ap, int)) < 0) 531 { 532 char msg[50]; 533 snprintf(msg, sizeof(msg), 534 "cmd %x failed at out byte %d of %d\n", 535 cmd, n + 1, n_out); 536 return fdc_err(fdc, msg); 537 } 538 } 539 n_in = va_arg(ap, int); 540 for (n = 0; n < n_in; n++) 541 { 542 int *ptr = va_arg(ap, int *); 543 if (fd_in(fdc, ptr) < 0) 544 { 545 char msg[50]; 546 snprintf(msg, sizeof(msg), 547 "cmd %02x failed at in byte %d of %d\n", 548 cmd, n + 1, n_in); 549 return fdc_err(fdc, msg); 550 } 551 } 552 553 return 0; 554 } 555 556 static int 557 enable_fifo(fdc_p fdc) 558 { 559 int i, j; 560 561 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 562 563 /* 564 * Cannot use fd_cmd the normal way here, since 565 * this might be an invalid command. Thus we send the 566 * first byte, and check for an early turn of data directon. 567 */ 568 569 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 570 return fdc_err(fdc, "Enable FIFO failed\n"); 571 572 /* If command is invalid, return */ 573 j = FDSTS_TIMEOUT; 574 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 575 != NE7_RQM && j-- > 0) { 576 if (i == (NE7_DIO | NE7_RQM)) { 577 fdc_reset(fdc); 578 return FD_FAILED; 579 } 580 DELAY(1); 581 } 582 if (j<0 || 583 fd_cmd(fdc, 3, 584 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 585 fdc_reset(fdc); 586 return fdc_err(fdc, "Enable FIFO failed\n"); 587 } 588 fdc->flags |= FDC_HAS_FIFO; 589 return 0; 590 } 591 if (fd_cmd(fdc, 4, 592 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 593 return fdc_err(fdc, "Re-enable FIFO failed\n"); 594 return 0; 595 } 596 597 static int 598 fd_sense_drive_status(fdc_p fdc, int *st3p) 599 { 600 int st3; 601 602 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 603 { 604 return fdc_err(fdc, "Sense Drive Status failed\n"); 605 } 606 if (st3p) 607 *st3p = st3; 608 609 return 0; 610 } 611 612 static int 613 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 614 { 615 int cyl, st0, ret; 616 617 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 618 if (ret) { 619 (void)fdc_err(fdc, 620 "sense intr err reading stat reg 0\n"); 621 return ret; 622 } 623 624 if (st0p) 625 *st0p = st0; 626 627 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 628 /* 629 * There doesn't seem to have been an interrupt. 630 */ 631 return FD_NOT_VALID; 632 } 633 634 if (fd_in(fdc, &cyl) < 0) { 635 return fdc_err(fdc, "can't get cyl num\n"); 636 } 637 638 if (cylp) 639 *cylp = cyl; 640 641 return 0; 642 } 643 644 645 static int 646 fd_read_status(fdc_p fdc) 647 { 648 int i, ret; 649 650 for (i = ret = 0; i < 7; i++) { 651 /* 652 * XXX types are poorly chosen. Only bytes can be read 653 * from the hardware, but fdc->status[] wants u_ints and 654 * fd_in() gives ints. 655 */ 656 int status; 657 658 ret = fd_in(fdc, &status); 659 fdc->status[i] = status; 660 if (ret != 0) 661 break; 662 } 663 664 if (ret == 0) 665 fdc->flags |= FDC_STAT_VALID; 666 else 667 fdc->flags &= ~FDC_STAT_VALID; 668 669 return ret; 670 } 671 672 static int 673 fdc_alloc_resources(struct fdc_data *fdc) 674 { 675 device_t dev; 676 int ispnp, ispcmcia, nports; 677 678 dev = fdc->fdc_dev; 679 ispnp = (fdc->flags & FDC_ISPNP) != 0; 680 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 681 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 682 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 683 684 /* 685 * On standard ISA, we don't just use an 8 port range 686 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 687 * register at 0x3f6. 688 * 689 * Isn't PC hardware wonderful. 690 * 691 * The Y-E Data PCMCIA FDC doesn't have this problem, it 692 * uses the register with offset 6 for pseudo-DMA, and the 693 * one with offset 7 as control register. 694 */ 695 nports = ispcmcia ? 8 : (ispnp ? 1 : 6); 696 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 697 &fdc->rid_ioport, 0ul, ~0ul, 698 nports, RF_ACTIVE); 699 if (fdc->res_ioport == 0) { 700 device_printf(dev, "cannot reserve I/O port range (%d ports)\n", 701 nports); 702 return ENXIO; 703 } 704 fdc->portt = rman_get_bustag(fdc->res_ioport); 705 fdc->porth = rman_get_bushandle(fdc->res_ioport); 706 707 if (!ispcmcia) { 708 /* 709 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 710 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 711 * by checking the size and adjust the port address 712 * accordingly. 713 */ 714 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 715 fdc->port_off = -2; 716 717 /* 718 * Register the control port range as rid 1 if it 719 * isn't there already. Most PnP BIOSen will have 720 * already done this but non-PnP configurations don't. 721 * 722 * And some (!!) report 0x3f2-0x3f5 and completely 723 * leave out the control register! It seems that some 724 * non-antique controller chips have a different 725 * method of programming the transfer speed which 726 * doesn't require the control register, but it's 727 * mighty bogus as the chip still responds to the 728 * address for the control register. 729 */ 730 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 731 u_long ctlstart; 732 733 /* Find the control port, usually 0x3f7 */ 734 ctlstart = rman_get_start(fdc->res_ioport) + 735 fdc->port_off + 7; 736 737 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); 738 } 739 740 /* 741 * Now (finally!) allocate the control port. 742 */ 743 fdc->rid_ctl = 1; 744 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 745 &fdc->rid_ctl, 746 0ul, ~0ul, 1, RF_ACTIVE); 747 if (fdc->res_ctl == 0) { 748 device_printf(dev, 749 "cannot reserve control I/O port range (control port)\n"); 750 return ENXIO; 751 } 752 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 753 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 754 } 755 756 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 757 &fdc->rid_irq, 0ul, ~0ul, 1, 758 RF_ACTIVE); 759 if (fdc->res_irq == 0) { 760 device_printf(dev, "cannot reserve interrupt line\n"); 761 return ENXIO; 762 } 763 764 if ((fdc->flags & FDC_NODMA) == 0) { 765 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 766 &fdc->rid_drq, 0ul, ~0ul, 1, 767 RF_ACTIVE); 768 if (fdc->res_drq == 0) { 769 device_printf(dev, "cannot reserve DMA request line\n"); 770 return ENXIO; 771 } 772 fdc->dmachan = fdc->res_drq->r_start; 773 } 774 775 return 0; 776 } 777 778 static void 779 fdc_release_resources(struct fdc_data *fdc) 780 { 781 device_t dev; 782 783 dev = fdc->fdc_dev; 784 if (fdc->res_irq != 0) { 785 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 786 fdc->res_irq); 787 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 788 fdc->res_irq); 789 } 790 if (fdc->res_ctl != 0) { 791 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 792 fdc->res_ctl); 793 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 794 fdc->res_ctl); 795 } 796 if (fdc->res_ioport != 0) { 797 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 798 fdc->res_ioport); 799 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 800 fdc->res_ioport); 801 } 802 if (fdc->res_drq != 0) { 803 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 804 fdc->res_drq); 805 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 806 fdc->res_drq); 807 } 808 } 809 810 /* 811 * Configuration/initialization stuff, per controller. 812 */ 813 814 static struct isa_pnp_id fdc_ids[] = { 815 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 816 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 817 {0} 818 }; 819 820 static int 821 fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 822 { 823 struct fdc_ivars *ivars = device_get_ivars(child); 824 825 switch (which) { 826 case FDC_IVAR_FDUNIT: 827 *result = ivars->fdunit; 828 break; 829 default: 830 return ENOENT; 831 } 832 return 0; 833 } 834 835 static int 836 fdc_probe(device_t dev) 837 { 838 int error, ic_type; 839 struct fdc_data *fdc; 840 841 fdc = device_get_softc(dev); 842 bzero(fdc, sizeof *fdc); 843 fdc->fdc_dev = dev; 844 fdc->fdctl_wr = fdctl_wr_isa; 845 846 /* Check pnp ids */ 847 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 848 if (error == ENXIO) 849 return ENXIO; 850 if (error == 0) 851 fdc->flags |= FDC_ISPNP; 852 853 /* Attempt to allocate our resources for the duration of the probe */ 854 error = fdc_alloc_resources(fdc); 855 if (error) 856 goto out; 857 858 /* First - lets reset the floppy controller */ 859 fdout_wr(fdc, 0); 860 DELAY(100); 861 fdout_wr(fdc, FDO_FRST); 862 863 /* see if it can handle a command */ 864 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 865 NE7_SPEC_2(2, 0), 0)) { 866 error = ENXIO; 867 goto out; 868 } 869 870 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 871 ic_type = (u_char)ic_type; 872 switch (ic_type) { 873 case 0x80: 874 device_set_desc(dev, "NEC 765 or clone"); 875 fdc->fdct = FDC_NE765; 876 break; 877 case 0x81: /* not mentioned in any hardware doc */ 878 case 0x90: 879 device_set_desc(dev, 880 "Enhanced floppy controller (i82077, NE72065 or clone)"); 881 fdc->fdct = FDC_ENHANCED; 882 break; 883 default: 884 device_set_desc(dev, "Generic floppy controller"); 885 fdc->fdct = FDC_UNKNOWN; 886 break; 887 } 888 } 889 890 out: 891 fdc_release_resources(fdc); 892 return (error); 893 } 894 895 #if NCARD > 0 896 897 static int 898 fdc_pccard_probe(device_t dev) 899 { 900 int error; 901 struct fdc_data *fdc; 902 903 fdc = device_get_softc(dev); 904 bzero(fdc, sizeof *fdc); 905 fdc->fdc_dev = dev; 906 fdc->fdctl_wr = fdctl_wr_pcmcia; 907 908 fdc->flags |= FDC_ISPCMCIA | FDC_NODMA; 909 910 /* Attempt to allocate our resources for the duration of the probe */ 911 error = fdc_alloc_resources(fdc); 912 if (error) 913 goto out; 914 915 /* First - lets reset the floppy controller */ 916 fdout_wr(fdc, 0); 917 DELAY(100); 918 fdout_wr(fdc, FDO_FRST); 919 920 /* see if it can handle a command */ 921 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 922 NE7_SPEC_2(2, 0), 0)) { 923 error = ENXIO; 924 goto out; 925 } 926 927 device_set_desc(dev, "Y-E Data PCMCIA floppy"); 928 fdc->fdct = FDC_NE765; 929 930 out: 931 fdc_release_resources(fdc); 932 return (error); 933 } 934 935 #endif /* NCARD > 0 */ 936 937 static int 938 fdc_detach(device_t dev) 939 { 940 struct fdc_data *fdc; 941 int error; 942 943 fdc = device_get_softc(dev); 944 945 /* have our children detached first */ 946 if ((error = bus_generic_detach(dev))) 947 return (error); 948 949 /* reset controller, turn motor off */ 950 fdout_wr(fdc, 0); 951 952 if ((fdc->flags & FDC_NODMA) == 0) 953 isa_dma_release(fdc->dmachan); 954 955 if ((fdc->flags & FDC_ATTACHED) == 0) { 956 device_printf(dev, "already unloaded\n"); 957 return (0); 958 } 959 fdc->flags &= ~FDC_ATTACHED; 960 961 BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq, 962 fdc->fdc_intr); 963 fdc_release_resources(fdc); 964 device_printf(dev, "unload\n"); 965 return (0); 966 } 967 968 /* 969 * Add a child device to the fdc controller. It will then be probed etc. 970 */ 971 static void 972 fdc_add_child(device_t dev, const char *name, int unit) 973 { 974 int disabled, flags; 975 struct fdc_ivars *ivar; 976 device_t child; 977 978 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO); 979 if (ivar == NULL) 980 return; 981 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 982 ivar->fdunit = 0; 983 child = device_add_child(dev, name, unit); 984 if (child == NULL) { 985 free(ivar, M_DEVBUF); 986 return; 987 } 988 device_set_ivars(child, ivar); 989 if (resource_int_value(name, unit, "flags", &flags) == 0) 990 device_set_flags(child, flags); 991 if (resource_int_value(name, unit, "disabled", &disabled) == 0 992 && disabled != 0) 993 device_disable(child); 994 } 995 996 static int 997 fdc_attach(device_t dev) 998 { 999 struct fdc_data *fdc; 1000 const char *name, *dname; 1001 int i, error, dunit; 1002 1003 fdc = device_get_softc(dev); 1004 error = fdc_alloc_resources(fdc); 1005 if (error) { 1006 device_printf(dev, "cannot re-acquire resources\n"); 1007 return error; 1008 } 1009 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 1010 INTR_TYPE_BIO | INTR_ENTROPY, fdc_intr, fdc, 1011 &fdc->fdc_intr); 1012 if (error) { 1013 device_printf(dev, "cannot setup interrupt\n"); 1014 return error; 1015 } 1016 fdc->fdcu = device_get_unit(dev); 1017 fdc->flags |= FDC_ATTACHED | FDC_NEEDS_RESET; 1018 1019 if ((fdc->flags & FDC_NODMA) == 0) { 1020 /* 1021 * Acquire the DMA channel forever, the driver will do 1022 * the rest 1023 * XXX should integrate with rman 1024 */ 1025 isa_dma_acquire(fdc->dmachan); 1026 isa_dmainit(fdc->dmachan, MAX_SEC_SIZE); 1027 } 1028 fdc->state = DEVIDLE; 1029 1030 /* reset controller, turn motor off, clear fdout mirror reg */ 1031 fdout_wr(fdc, fdc->fdout = 0); 1032 bioq_init(&fdc->head); 1033 1034 /* 1035 * Probe and attach any children. We should probably detect 1036 * devices from the BIOS unless overridden. 1037 */ 1038 name = device_get_nameunit(dev); 1039 i = 0; 1040 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) 1041 fdc_add_child(dev, dname, dunit); 1042 1043 if ((error = bus_generic_attach(dev)) != 0) 1044 return (error); 1045 1046 return (0); 1047 } 1048 1049 static int 1050 fdc_print_child(device_t me, device_t child) 1051 { 1052 int retval = 0, flags; 1053 1054 retval += bus_print_child_header(me, child); 1055 retval += printf(" on %s drive %d", device_get_nameunit(me), 1056 fdc_get_fdunit(child)); 1057 if ((flags = device_get_flags(me)) != 0) 1058 retval += printf(" flags %#x", flags); 1059 retval += printf("\n"); 1060 1061 return (retval); 1062 } 1063 1064 static device_method_t fdc_methods[] = { 1065 /* Device interface */ 1066 DEVMETHOD(device_probe, fdc_probe), 1067 DEVMETHOD(device_attach, fdc_attach), 1068 DEVMETHOD(device_detach, fdc_detach), 1069 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1070 DEVMETHOD(device_suspend, bus_generic_suspend), 1071 DEVMETHOD(device_resume, bus_generic_resume), 1072 1073 /* Bus interface */ 1074 DEVMETHOD(bus_print_child, fdc_print_child), 1075 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 1076 /* Our children never use any other bus interface methods. */ 1077 1078 { 0, 0 } 1079 }; 1080 1081 static driver_t fdc_driver = { 1082 "fdc", 1083 fdc_methods, 1084 sizeof(struct fdc_data) 1085 }; 1086 1087 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 1088 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, 0, 0); 1089 1090 #if NCARD > 0 1091 1092 static device_method_t fdc_pccard_methods[] = { 1093 /* Device interface */ 1094 DEVMETHOD(device_probe, fdc_pccard_probe), 1095 DEVMETHOD(device_attach, fdc_attach), 1096 DEVMETHOD(device_detach, fdc_detach), 1097 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1098 DEVMETHOD(device_suspend, bus_generic_suspend), 1099 DEVMETHOD(device_resume, bus_generic_resume), 1100 1101 /* Bus interface */ 1102 DEVMETHOD(bus_print_child, fdc_print_child), 1103 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 1104 /* Our children never use any other bus interface methods. */ 1105 1106 { 0, 0 } 1107 }; 1108 1109 static driver_t fdc_pccard_driver = { 1110 "fdc", 1111 fdc_pccard_methods, 1112 sizeof(struct fdc_data) 1113 }; 1114 1115 DRIVER_MODULE(fdc, pccard, fdc_pccard_driver, fdc_devclass, 0, 0); 1116 1117 #endif /* NCARD > 0 */ 1118 1119 /* 1120 * Create a clone device upon request by devfs. 1121 */ 1122 static void 1123 fd_clone(void *arg, char *name, int namelen, dev_t *dev) 1124 { 1125 struct fd_data *fd; 1126 int i, u; 1127 char *n; 1128 size_t l; 1129 1130 fd = (struct fd_data *)arg; 1131 if (*dev != NODEV) 1132 return; 1133 if (dev_stdclone(name, &n, "fd", &u) != 2) 1134 return; 1135 if (u != fd->fdu) 1136 /* unit # mismatch */ 1137 return; 1138 l = strlen(n); 1139 if (l == 1 && *n >= 'a' && *n <= 'h') { 1140 /* 1141 * Trailing letters a through h denote 1142 * pseudo-partitions. We don't support true 1143 * (UFS-style) partitions, so we just implement them 1144 * as symlinks if someone asks us nicely. 1145 */ 1146 *dev = make_dev_alias(fd->masterdev, name); 1147 return; 1148 } 1149 if (l >= 2 && l <= 5 && *n == '.') { 1150 /* 1151 * Trailing numbers, preceded by a dot, denote 1152 * subdevices for different densities. Historically, 1153 * they have been named by density (like fd0.1440), 1154 * but we allow arbitrary numbers between 1 and 4 1155 * digits, so fd0.1 through fd0.15 are possible as 1156 * well. 1157 */ 1158 for (i = 1; i < l; i++) 1159 if (n[i] < '' || n[i] > '9') 1160 return; 1161 for (i = 0; i < NUMDENS - 1; i++) 1162 if (fd->clonedevs[i] == NODEV) { 1163 *dev = make_dev(&fd_cdevsw, 1164 FDNUMTOUNIT(u) + i + 1, 1165 UID_ROOT, GID_OPERATOR, 0640, 1166 name); 1167 fd->clonedevs[i] = *dev; 1168 return; 1169 } 1170 } 1171 } 1172 1173 /* 1174 * Configuration/initialization, per drive. 1175 */ 1176 static int 1177 fd_probe(device_t dev) 1178 { 1179 int i; 1180 u_int st0, st3; 1181 struct fd_data *fd; 1182 struct fdc_data *fdc; 1183 fdsu_t fdsu; 1184 int flags; 1185 1186 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 1187 fd = device_get_softc(dev); 1188 fdc = device_get_softc(device_get_parent(dev)); 1189 flags = device_get_flags(dev); 1190 1191 bzero(fd, sizeof *fd); 1192 fd->dev = dev; 1193 fd->fdc = fdc; 1194 fd->fdsu = fdsu; 1195 fd->fdu = device_get_unit(dev); 1196 fd->flags = FD_UA; /* make sure fdautoselect() will be called */ 1197 1198 fd->type = FD_DTYPE(flags); 1199 /* 1200 * XXX I think using __i386__ is wrong here since we actually want to probe 1201 * for the machine type, not the CPU type (so non-PC arch's like the PC98 will 1202 * fail the probe). However, for whatever reason, testing for _MACHINE_ARCH 1203 * == i386 breaks the test on FreeBSD/Alpha. 1204 */ 1205 #ifdef __i386__ 1206 if (fd->type == FDT_NONE && (fd->fdu == 0 || fd->fdu == 1)) { 1207 /* Look up what the BIOS thinks we have. */ 1208 if (fd->fdu == 0) { 1209 if ((fdc->flags & FDC_ISPCMCIA)) 1210 /* 1211 * Somewhat special. No need to force the 1212 * user to set device flags, since the Y-E 1213 * Data PCMCIA floppy is always a 1.44 MB 1214 * device. 1215 */ 1216 fd->type = FDT_144M; 1217 else 1218 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4; 1219 } else { 1220 fd->type = rtcin(RTC_FDISKETTE) & 0x0f; 1221 } 1222 if (fd->type == FDT_288M_1) 1223 fd->type = FDT_288M; 1224 } 1225 #endif /* __i386__ */ 1226 /* is there a unit? */ 1227 if (fd->type == FDT_NONE) 1228 return (ENXIO); 1229 1230 /* select it */ 1231 set_motor(fdc, fdsu, TURNON); 1232 fdc_reset(fdc); /* XXX reset, then unreset, etc. */ 1233 DELAY(1000000); /* 1 sec */ 1234 1235 /* XXX This doesn't work before the first set_motor() */ 1236 if ((fdc->flags & FDC_HAS_FIFO) == 0 && 1237 fdc->fdct == FDC_ENHANCED && 1238 (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 && 1239 enable_fifo(fdc) == 0) { 1240 device_printf(device_get_parent(dev), 1241 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 1242 } 1243 1244 if ((flags & FD_NO_PROBE) == 0) { 1245 /* If we're at track 0 first seek inwards. */ 1246 if ((fd_sense_drive_status(fdc, &st3) == 0) && 1247 (st3 & NE7_ST3_T0)) { 1248 /* Seek some steps... */ 1249 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 1250 /* ...wait a moment... */ 1251 DELAY(300000); 1252 /* make ctrlr happy: */ 1253 fd_sense_int(fdc, 0, 0); 1254 } 1255 } 1256 1257 for (i = 0; i < 2; i++) { 1258 /* 1259 * we must recalibrate twice, just in case the 1260 * heads have been beyond cylinder 76, since 1261 * most FDCs still barf when attempting to 1262 * recalibrate more than 77 steps 1263 */ 1264 /* go back to 0: */ 1265 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 1266 /* a second being enough for full stroke seek*/ 1267 DELAY(i == 0 ? 1000000 : 300000); 1268 1269 /* anything responding? */ 1270 if (fd_sense_int(fdc, &st0, 0) == 0 && 1271 (st0 & NE7_ST0_EC) == 0) 1272 break; /* already probed succesfully */ 1273 } 1274 } 1275 } 1276 1277 set_motor(fdc, fdsu, TURNOFF); 1278 1279 if ((flags & FD_NO_PROBE) == 0 && 1280 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */ 1281 return (ENXIO); 1282 1283 switch (fd->type) { 1284 case FDT_12M: 1285 device_set_desc(dev, "1200-KB 5.25\" drive"); 1286 fd->type = FDT_12M; 1287 break; 1288 case FDT_144M: 1289 device_set_desc(dev, "1440-KB 3.5\" drive"); 1290 fd->type = FDT_144M; 1291 break; 1292 case FDT_288M: 1293 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 1294 fd->type = FDT_288M; 1295 break; 1296 case FDT_360K: 1297 device_set_desc(dev, "360-KB 5.25\" drive"); 1298 fd->type = FDT_360K; 1299 break; 1300 case FDT_720K: 1301 device_set_desc(dev, "720-KB 3.5\" drive"); 1302 fd->type = FDT_720K; 1303 break; 1304 default: 1305 return (ENXIO); 1306 } 1307 fd->track = FD_NO_TRACK; 1308 fd->fdc = fdc; 1309 fd->fdsu = fdsu; 1310 fd->options = 0; 1311 callout_handle_init(&fd->toffhandle); 1312 callout_handle_init(&fd->tohandle); 1313 1314 /* initialize densities for subdevices */ 1315 for (i = 0; i < NUMDENS; i++) 1316 memcpy(fd->fts + i, fd_native_types + fd->type, 1317 sizeof(struct fd_type)); 1318 return (0); 1319 } 1320 1321 static int 1322 fd_attach(device_t dev) 1323 { 1324 struct fd_data *fd; 1325 int i; 1326 1327 fd = device_get_softc(dev); 1328 fd->clonetag = EVENTHANDLER_REGISTER(dev_clone, fd_clone, fd, 1000); 1329 fd->masterdev = make_dev(&fd_cdevsw, fd->fdu << 6, 1330 UID_ROOT, GID_OPERATOR, 0640, "fd%d", fd->fdu); 1331 for (i = 0; i < NUMDENS - 1; i++) 1332 fd->clonedevs[i] = NODEV; 1333 fd->device_stats = devstat_new_entry(device_get_name(dev), 1334 device_get_unit(dev), 0, DEVSTAT_NO_ORDERED_TAGS, 1335 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1336 DEVSTAT_PRIORITY_FD); 1337 return (0); 1338 } 1339 1340 static int 1341 fd_detach(device_t dev) 1342 { 1343 struct fd_data *fd; 1344 int i; 1345 1346 fd = device_get_softc(dev); 1347 untimeout(fd_turnoff, fd, fd->toffhandle); 1348 devstat_remove_entry(fd->device_stats); 1349 destroy_dev(fd->masterdev); 1350 for (i = 0; i < NUMDENS - 1; i++) 1351 if (fd->clonedevs[i] != NODEV) 1352 destroy_dev(fd->clonedevs[i]); 1353 EVENTHANDLER_DEREGISTER(dev_clone, fd->clonetag); 1354 1355 return (0); 1356 } 1357 1358 static device_method_t fd_methods[] = { 1359 /* Device interface */ 1360 DEVMETHOD(device_probe, fd_probe), 1361 DEVMETHOD(device_attach, fd_attach), 1362 DEVMETHOD(device_detach, fd_detach), 1363 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1364 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1365 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1366 1367 { 0, 0 } 1368 }; 1369 1370 static driver_t fd_driver = { 1371 "fd", 1372 fd_methods, 1373 sizeof(struct fd_data) 1374 }; 1375 1376 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1377 1378 /* 1379 * More auxiliary functions. 1380 */ 1381 /* 1382 * Motor control stuff. 1383 * Remember to not deselect the drive we're working on. 1384 */ 1385 static void 1386 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1387 { 1388 int fdout; 1389 1390 fdout = fdc->fdout; 1391 if (turnon) { 1392 fdout &= ~FDO_FDSEL; 1393 fdout |= (FDO_MOEN0 << fdsu) | FDO_FDMAEN | FDO_FRST | fdsu; 1394 } else 1395 fdout &= ~(FDO_MOEN0 << fdsu); 1396 fdc->fdout = fdout; 1397 fdout_wr(fdc, fdout); 1398 TRACE1("[0x%x->FDOUT]", fdout); 1399 } 1400 1401 static void 1402 fd_turnoff(void *xfd) 1403 { 1404 int s; 1405 fd_p fd = xfd; 1406 1407 TRACE1("[fd%d: turnoff]", fd->fdu); 1408 1409 s = splbio(); 1410 /* 1411 * Don't turn off the motor yet if the drive is active. 1412 * 1413 * If we got here, this could only mean we missed an interrupt. 1414 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1415 * after a controller reset. Just schedule a pseudo-interrupt 1416 * so the state machine gets re-entered. 1417 */ 1418 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1419 fdc_intr(fd->fdc); 1420 splx(s); 1421 return; 1422 } 1423 1424 fd->flags &= ~FD_MOTOR; 1425 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1426 splx(s); 1427 } 1428 1429 static void 1430 fd_motor_on(void *xfd) 1431 { 1432 int s; 1433 fd_p fd = xfd; 1434 1435 s = splbio(); 1436 fd->flags &= ~FD_MOTOR_WAIT; 1437 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1438 { 1439 fdc_intr(fd->fdc); 1440 } 1441 splx(s); 1442 } 1443 1444 static void 1445 fd_turnon(fd_p fd) 1446 { 1447 if(!(fd->flags & FD_MOTOR)) 1448 { 1449 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1450 set_motor(fd->fdc, fd->fdsu, TURNON); 1451 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */ 1452 } 1453 } 1454 1455 static void 1456 fdc_reset(fdc_p fdc) 1457 { 1458 /* Try a reset, keep motor on */ 1459 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1460 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1461 DELAY(100); 1462 /* enable FDC, but defer interrupts a moment */ 1463 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1464 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1465 DELAY(100); 1466 fdout_wr(fdc, fdc->fdout); 1467 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1468 1469 /* XXX after a reset, silently believe the FDC will accept commands */ 1470 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1471 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1472 0); 1473 if (fdc->flags & FDC_HAS_FIFO) 1474 (void) enable_fifo(fdc); 1475 } 1476 1477 /* 1478 * FDC IO functions, take care of the main status register, timeout 1479 * in case the desired status bits are never set. 1480 * 1481 * These PIO loops initially start out with short delays between 1482 * each iteration in the expectation that the required condition 1483 * is usually met quickly, so it can be handled immediately. After 1484 * about 1 ms, stepping is increased to achieve a better timing 1485 * accuracy in the calls to DELAY(). 1486 */ 1487 static int 1488 fd_in(struct fdc_data *fdc, int *ptr) 1489 { 1490 int i, j, step; 1491 1492 for (j = 0, step = 1; 1493 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) && 1494 j < FDSTS_TIMEOUT; 1495 j += step) { 1496 if (i == NE7_RQM) 1497 return (fdc_err(fdc, "ready for output in input\n")); 1498 if (j == 1000) 1499 step = 1000; 1500 DELAY(step); 1501 } 1502 if (j >= FDSTS_TIMEOUT) 1503 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); 1504 #ifdef FDC_DEBUG 1505 i = fddata_rd(fdc); 1506 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1507 *ptr = i; 1508 return (0); 1509 #else /* !FDC_DEBUG */ 1510 i = fddata_rd(fdc); 1511 if (ptr) 1512 *ptr = i; 1513 return (0); 1514 #endif /* FDC_DEBUG */ 1515 } 1516 1517 static int 1518 out_fdc(struct fdc_data *fdc, int x) 1519 { 1520 int i, j, step; 1521 1522 for (j = 0, step = 1; 1523 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM && 1524 j < FDSTS_TIMEOUT; 1525 j += step) { 1526 if (i == (NE7_DIO|NE7_RQM)) 1527 return (fdc_err(fdc, "ready for input in output\n")); 1528 if (j == 1000) 1529 step = 1000; 1530 DELAY(step); 1531 } 1532 if (j >= FDSTS_TIMEOUT) 1533 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); 1534 1535 /* Send the command and return */ 1536 fddata_wr(fdc, x); 1537 TRACE1("[0x%x->FDDATA]", x); 1538 return (0); 1539 } 1540 1541 /* 1542 * Block device driver interface functions (interspersed with even more 1543 * auxiliary functions). 1544 */ 1545 static int 1546 Fdopen(dev_t dev, int flags, int mode, struct thread *td) 1547 { 1548 fdu_t fdu = FDUNIT(minor(dev)); 1549 int type = FDTYPE(minor(dev)); 1550 fd_p fd; 1551 fdc_p fdc; 1552 int rv, unitattn, dflags; 1553 1554 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1555 return (ENXIO); 1556 fdc = fd->fdc; 1557 if ((fdc == NULL) || (fd->type == FDT_NONE)) 1558 return (ENXIO); 1559 if (type > NUMDENS) 1560 return (ENXIO); 1561 dflags = device_get_flags(fd->dev); 1562 /* 1563 * This is a bit bogus. It's still possible that e. g. a 1564 * descriptor gets inherited to a child, but then it's at 1565 * least for the same subdevice. By checking FD_OPEN here, we 1566 * can ensure that a device isn't attempted to be opened with 1567 * different densities at the same time where the second open 1568 * could clobber the settings from the first one. 1569 */ 1570 if (fd->flags & FD_OPEN) 1571 return (EBUSY); 1572 1573 if (type == 0) { 1574 if (flags & FNONBLOCK) { 1575 /* 1576 * Unfortunately, physio(9) discards its ioflag 1577 * argument, thus preventing us from seeing the 1578 * IO_NDELAY bit. So we need to keep track 1579 * ourselves. 1580 */ 1581 fd->flags |= FD_NONBLOCK; 1582 fd->ft = 0; 1583 } else { 1584 /* 1585 * Figure out a unit attention condition. 1586 * 1587 * If UA has been forced, proceed. 1588 * 1589 * If motor is off, turn it on for a moment 1590 * and select our drive, in order to read the 1591 * UA hardware signal. 1592 * 1593 * If motor is on, and our drive is currently 1594 * selected, just read the hardware bit. 1595 * 1596 * If motor is on, but active for another 1597 * drive on that controller, we are lost. We 1598 * cannot risk to deselect the other drive, so 1599 * we just assume a forced UA condition to be 1600 * on the safe side. 1601 */ 1602 unitattn = 0; 1603 if ((dflags & FD_NO_CHLINE) != 0 || 1604 (fd->flags & FD_UA) != 0) { 1605 unitattn = 1; 1606 fd->flags &= ~FD_UA; 1607 } else if (fdc->fdout & (FDO_MOEN0 | FDO_MOEN1 | 1608 FDO_MOEN2 | FDO_MOEN3)) { 1609 if ((fdc->fdout & FDO_FDSEL) == fd->fdsu) 1610 unitattn = fdin_rd(fdc) & FDI_DCHG; 1611 else 1612 unitattn = 1; 1613 } else { 1614 set_motor(fdc, fd->fdsu, TURNON); 1615 unitattn = fdin_rd(fdc) & FDI_DCHG; 1616 set_motor(fdc, fd->fdsu, TURNOFF); 1617 } 1618 if (unitattn && (rv = fdautoselect(dev)) != 0) 1619 return (rv); 1620 } 1621 } else { 1622 fd->ft = fd->fts + type; 1623 } 1624 fd->flags |= FD_OPEN; 1625 /* 1626 * Clearing the DMA overrun counter at open time is a bit messy. 1627 * Since we're only managing one counter per controller, opening 1628 * the second drive could mess it up. Anyway, if the DMA overrun 1629 * condition is really persistent, it will eventually time out 1630 * still. OTOH, clearing it here will ensure we'll at least start 1631 * trying again after a previous (maybe even long ago) failure. 1632 * Also, this is merely a stop-gap measure only that should not 1633 * happen during normal operation, so we can tolerate it to be a 1634 * bit sloppy about this. 1635 */ 1636 fdc->dma_overruns = 0; 1637 1638 return 0; 1639 } 1640 1641 static int 1642 fdclose(dev_t dev, int flags, int mode, struct thread *td) 1643 { 1644 fdu_t fdu = FDUNIT(minor(dev)); 1645 struct fd_data *fd; 1646 1647 fd = devclass_get_softc(fd_devclass, fdu); 1648 fd->flags &= ~(FD_OPEN | FD_NONBLOCK); 1649 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR); 1650 1651 return (0); 1652 } 1653 1654 static void 1655 fdstrategy(struct bio *bp) 1656 { 1657 long blknum, nblocks; 1658 int s; 1659 fdu_t fdu; 1660 fdc_p fdc; 1661 fd_p fd; 1662 size_t fdblk; 1663 1664 fdu = FDUNIT(minor(bp->bio_dev)); 1665 fd = devclass_get_softc(fd_devclass, fdu); 1666 if (fd == 0) 1667 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1668 (u_long)major(bp->bio_dev), (u_long)minor(bp->bio_dev)); 1669 fdc = fd->fdc; 1670 if (fd->type == FDT_NONE || fd->ft == 0) { 1671 bp->bio_error = ENXIO; 1672 bp->bio_flags |= BIO_ERROR; 1673 goto bad; 1674 } 1675 fdblk = 128 << (fd->ft->secsize); 1676 if (bp->bio_cmd != FDBIO_FORMAT && bp->bio_cmd != FDBIO_RDSECTID) { 1677 if (fd->flags & FD_NONBLOCK) { 1678 bp->bio_error = EAGAIN; 1679 bp->bio_flags |= BIO_ERROR; 1680 goto bad; 1681 } 1682 if (bp->bio_blkno < 0) { 1683 printf( 1684 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n", 1685 fdu, (u_long)bp->bio_blkno, bp->bio_bcount); 1686 bp->bio_error = EINVAL; 1687 bp->bio_flags |= BIO_ERROR; 1688 goto bad; 1689 } 1690 if ((bp->bio_bcount % fdblk) != 0) { 1691 bp->bio_error = EINVAL; 1692 bp->bio_flags |= BIO_ERROR; 1693 goto bad; 1694 } 1695 } 1696 1697 /* 1698 * Set up block calculations. 1699 */ 1700 if (bp->bio_blkno > 20000000) { 1701 /* 1702 * Reject unreasonably high block number, prevent the 1703 * multiplication below from overflowing. 1704 */ 1705 bp->bio_error = EINVAL; 1706 bp->bio_flags |= BIO_ERROR; 1707 goto bad; 1708 } 1709 blknum = bp->bio_blkno * DEV_BSIZE / fdblk; 1710 nblocks = fd->ft->size; 1711 if (blknum + bp->bio_bcount / fdblk > nblocks) { 1712 if (blknum >= nblocks) { 1713 if (bp->bio_cmd == BIO_READ) 1714 bp->bio_resid = bp->bio_bcount; 1715 else { 1716 bp->bio_error = ENOSPC; 1717 bp->bio_flags |= BIO_ERROR; 1718 } 1719 goto bad; /* not always bad, but EOF */ 1720 } 1721 bp->bio_bcount = (nblocks - blknum) * fdblk; 1722 } 1723 bp->bio_pblkno = blknum; 1724 s = splbio(); 1725 bioq_disksort(&fdc->head, bp); 1726 untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */ 1727 devstat_start_transaction_bio(fd->device_stats, bp); 1728 device_busy(fd->dev); 1729 fdstart(fdc); 1730 splx(s); 1731 return; 1732 1733 bad: 1734 biodone(bp); 1735 } 1736 1737 /* 1738 * fdstart 1739 * 1740 * We have just queued something. If the controller is not busy 1741 * then simulate the case where it has just finished a command 1742 * So that it (the interrupt routine) looks on the queue for more 1743 * work to do and picks up what we just added. 1744 * 1745 * If the controller is already busy, we need do nothing, as it 1746 * will pick up our work when the present work completes. 1747 */ 1748 static void 1749 fdstart(struct fdc_data *fdc) 1750 { 1751 int s; 1752 1753 s = splbio(); 1754 if(fdc->state == DEVIDLE) 1755 { 1756 fdc_intr(fdc); 1757 } 1758 splx(s); 1759 } 1760 1761 static void 1762 fd_iotimeout(void *xfdc) 1763 { 1764 fdc_p fdc; 1765 int s; 1766 1767 fdc = xfdc; 1768 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1769 1770 /* 1771 * Due to IBM's brain-dead design, the FDC has a faked ready 1772 * signal, hardwired to ready == true. Thus, any command 1773 * issued if there's no diskette in the drive will _never_ 1774 * complete, and must be aborted by resetting the FDC. 1775 * Many thanks, Big Blue! 1776 * The FDC must not be reset directly, since that would 1777 * interfere with the state machine. Instead, pretend that 1778 * the command completed but was invalid. The state machine 1779 * will reset the FDC and retry once. 1780 */ 1781 s = splbio(); 1782 fdc->status[0] = NE7_ST0_IC_IV; 1783 fdc->flags &= ~FDC_STAT_VALID; 1784 fdc->state = IOTIMEDOUT; 1785 fdc_intr(fdc); 1786 splx(s); 1787 } 1788 1789 /* Just ensure it has the right spl. */ 1790 static void 1791 fd_pseudointr(void *xfdc) 1792 { 1793 int s; 1794 1795 s = splbio(); 1796 fdc_intr(xfdc); 1797 splx(s); 1798 } 1799 1800 /* 1801 * fdc_intr 1802 * 1803 * Keep calling the state machine until it returns a 0. 1804 * Always called at splbio. 1805 */ 1806 static void 1807 fdc_intr(void *xfdc) 1808 { 1809 fdc_p fdc = xfdc; 1810 while(fdstate(fdc)) 1811 ; 1812 } 1813 1814 /* 1815 * Magic pseudo-DMA initialization for YE FDC. Sets count and 1816 * direction. 1817 */ 1818 #define SET_BCDR(fdc,wr,cnt,port) \ 1819 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1820 ((cnt)-1) & 0xff); \ 1821 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1822 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1823 1824 /* 1825 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy. 1826 */ 1827 static int 1828 fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count) 1829 { 1830 u_char *cptr = (u_char *)addr; 1831 1832 if (flags == BIO_READ) { 1833 if (fdc->state != PIOREAD) { 1834 fdc->state = PIOREAD; 1835 return(0); 1836 } 1837 SET_BCDR(fdc, 0, count, 0); 1838 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1839 FDC_YE_DATAPORT, cptr, count); 1840 } else { 1841 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1842 FDC_YE_DATAPORT, cptr, count); 1843 SET_BCDR(fdc, 0, count, 0); 1844 } 1845 return(1); 1846 } 1847 1848 /* 1849 * Try figuring out the density of the media present in our device. 1850 */ 1851 static int 1852 fdautoselect(dev_t dev) 1853 { 1854 fdu_t fdu; 1855 fd_p fd; 1856 struct fd_type *fdtp; 1857 struct fdc_readid id; 1858 int i, n, oopts, rv; 1859 1860 fdu = FDUNIT(minor(dev)); 1861 fd = devclass_get_softc(fd_devclass, fdu); 1862 1863 switch (fd->type) { 1864 default: 1865 return (ENXIO); 1866 1867 case FDT_360K: 1868 case FDT_720K: 1869 /* no autoselection on those drives */ 1870 fd->ft = fd_native_types + fd->type; 1871 return (0); 1872 1873 case FDT_12M: 1874 fdtp = fd_searchlist_12m; 1875 n = sizeof fd_searchlist_12m / sizeof(struct fd_type); 1876 break; 1877 1878 case FDT_144M: 1879 fdtp = fd_searchlist_144m; 1880 n = sizeof fd_searchlist_144m / sizeof(struct fd_type); 1881 break; 1882 1883 case FDT_288M: 1884 fdtp = fd_searchlist_288m; 1885 n = sizeof fd_searchlist_288m / sizeof(struct fd_type); 1886 break; 1887 } 1888 1889 /* 1890 * Try reading sector ID fields, first at cylinder 0, head 0, 1891 * then at cylinder 2, head N. We don't probe cylinder 1, 1892 * since for 5.25in DD media in a HD drive, there are no data 1893 * to read (2 step pulses per media cylinder required). For 1894 * two-sided media, the second probe always goes to head 1, so 1895 * we can tell them apart from single-sided media. As a 1896 * side-effect this means that single-sided media should be 1897 * mentioned in the search list after two-sided media of an 1898 * otherwise identical density. Media with a different number 1899 * of sectors per track but otherwise identical parameters 1900 * cannot be distinguished at all. 1901 * 1902 * If we successfully read an ID field on both cylinders where 1903 * the recorded values match our expectation, we are done. 1904 * Otherwise, we try the next density entry from the table. 1905 * 1906 * Stepping to cylinder 2 has the side-effect of clearing the 1907 * unit attention bit. 1908 */ 1909 oopts = fd->options; 1910 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY; 1911 for (i = 0; i < n; i++, fdtp++) { 1912 fd->ft = fdtp; 1913 1914 id.cyl = id.head = 0; 1915 rv = fdmisccmd(dev, FDBIO_RDSECTID, &id); 1916 if (rv != 0) 1917 continue; 1918 if (id.cyl != 0 || id.head != 0 || 1919 id.secshift != fdtp->secsize) 1920 continue; 1921 id.cyl = 2; 1922 id.head = fd->ft->heads - 1; 1923 rv = fdmisccmd(dev, FDBIO_RDSECTID, &id); 1924 if (id.cyl != 2 || id.head != fdtp->heads - 1 || 1925 id.secshift != fdtp->secsize) 1926 continue; 1927 if (rv == 0) 1928 break; 1929 } 1930 1931 fd->options = oopts; 1932 if (i == n) { 1933 if (bootverbose) 1934 device_printf(fd->dev, "autoselection failed\n"); 1935 fd->ft = 0; 1936 return (EIO); 1937 } else { 1938 if (bootverbose) 1939 device_printf(fd->dev, "autoselected %d KB medium\n", 1940 fd->ft->size / 2); 1941 return (0); 1942 } 1943 } 1944 1945 1946 /* 1947 * The controller state machine. 1948 * 1949 * If it returns a non zero value, it should be called again immediately. 1950 */ 1951 static int 1952 fdstate(fdc_p fdc) 1953 { 1954 struct fdc_readid *idp; 1955 int read, format, rdsectid, cylinder, head, i, sec = 0, sectrac; 1956 int st0, cyl, st3, idf, ne7cmd, mfm, steptrac; 1957 unsigned long blknum; 1958 fdu_t fdu = fdc->fdu; 1959 fd_p fd; 1960 register struct bio *bp; 1961 struct fd_formb *finfo = NULL; 1962 size_t fdblk; 1963 1964 bp = fdc->bp; 1965 if (bp == NULL) { 1966 bp = bioq_first(&fdc->head); 1967 if (bp != NULL) { 1968 bioq_remove(&fdc->head, bp); 1969 fdc->bp = bp; 1970 } 1971 } 1972 if (bp == NULL) { 1973 /* 1974 * Nothing left for this controller to do, 1975 * force into the IDLE state. 1976 */ 1977 fdc->state = DEVIDLE; 1978 if (fdc->fd) { 1979 device_printf(fdc->fdc_dev, 1980 "unexpected valid fd pointer\n"); 1981 fdc->fd = (fd_p) 0; 1982 fdc->fdu = -1; 1983 } 1984 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1985 return (0); 1986 } 1987 fdu = FDUNIT(minor(bp->bio_dev)); 1988 fd = devclass_get_softc(fd_devclass, fdu); 1989 fdblk = 128 << fd->ft->secsize; 1990 if (fdc->fd && (fd != fdc->fd)) 1991 device_printf(fd->dev, "confused fd pointers\n"); 1992 read = bp->bio_cmd == BIO_READ; 1993 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0; 1994 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1; 1995 if (read) 1996 idf = ISADMA_READ; 1997 else 1998 idf = ISADMA_WRITE; 1999 format = bp->bio_cmd == FDBIO_FORMAT; 2000 rdsectid = bp->bio_cmd == FDBIO_RDSECTID; 2001 if (format) 2002 finfo = (struct fd_formb *)bp->bio_data; 2003 TRACE1("fd%d", fdu); 2004 TRACE1("[%s]", fdstates[fdc->state]); 2005 TRACE1("(0x%x)", fd->flags); 2006 untimeout(fd_turnoff, fd, fd->toffhandle); 2007 fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz); 2008 switch (fdc->state) 2009 { 2010 case DEVIDLE: 2011 case FINDWORK: /* we have found new work */ 2012 fdc->retry = 0; 2013 fd->skip = 0; 2014 fdc->fd = fd; 2015 fdc->fdu = fdu; 2016 fdc->fdctl_wr(fdc, fd->ft->trans); 2017 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 2018 /* 2019 * If the next drive has a motor startup pending, then 2020 * it will start up in its own good time. 2021 */ 2022 if(fd->flags & FD_MOTOR_WAIT) { 2023 fdc->state = MOTORWAIT; 2024 return (0); /* will return later */ 2025 } 2026 /* 2027 * Maybe if it's not starting, it SHOULD be starting. 2028 */ 2029 if (!(fd->flags & FD_MOTOR)) 2030 { 2031 fdc->state = MOTORWAIT; 2032 fd_turnon(fd); 2033 return (0); /* will return later */ 2034 } 2035 else /* at least make sure we are selected */ 2036 { 2037 set_motor(fdc, fd->fdsu, TURNON); 2038 } 2039 if (fdc->flags & FDC_NEEDS_RESET) { 2040 fdc->state = RESETCTLR; 2041 fdc->flags &= ~FDC_NEEDS_RESET; 2042 } else 2043 fdc->state = DOSEEK; 2044 return (1); /* will return immediately */ 2045 2046 case DOSEEK: 2047 blknum = bp->bio_pblkno + fd->skip / fdblk; 2048 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 2049 if (cylinder == fd->track) 2050 { 2051 fdc->state = SEEKCOMPLETE; 2052 return (1); /* will return immediately */ 2053 } 2054 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 2055 fd->fdsu, cylinder * steptrac, 0)) 2056 { 2057 /* 2058 * Seek command not accepted, looks like 2059 * the FDC went off to the Saints... 2060 */ 2061 fdc->retry = 6; /* try a reset */ 2062 return(retrier(fdc)); 2063 } 2064 fd->track = FD_NO_TRACK; 2065 fdc->state = SEEKWAIT; 2066 return(0); /* will return later */ 2067 2068 case SEEKWAIT: 2069 /* allow heads to settle */ 2070 timeout(fd_pseudointr, fdc, hz / 16); 2071 fdc->state = SEEKCOMPLETE; 2072 return(0); /* will return later */ 2073 2074 case SEEKCOMPLETE : /* seek done, start DMA */ 2075 blknum = bp->bio_pblkno + fd->skip / fdblk; 2076 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 2077 2078 /* Make sure seek really happened. */ 2079 if(fd->track == FD_NO_TRACK) { 2080 int descyl = cylinder * steptrac; 2081 do { 2082 /* 2083 * This might be a "ready changed" interrupt, 2084 * which cannot really happen since the 2085 * RDY pin is hardwired to + 5 volts. This 2086 * generally indicates a "bouncing" intr 2087 * line, so do one of the following: 2088 * 2089 * When running on an enhanced FDC that is 2090 * known to not go stuck after responding 2091 * with INVALID, fetch all interrupt states 2092 * until seeing either an INVALID or a 2093 * real interrupt condition. 2094 * 2095 * When running on a dumb old NE765, give 2096 * up immediately. The controller will 2097 * provide up to four dummy RC interrupt 2098 * conditions right after reset (for the 2099 * corresponding four drives), so this is 2100 * our only chance to get notice that it 2101 * was not the FDC that caused the interrupt. 2102 */ 2103 if (fd_sense_int(fdc, &st0, &cyl) 2104 == FD_NOT_VALID) 2105 return (0); /* will return later */ 2106 if(fdc->fdct == FDC_NE765 2107 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2108 return (0); /* hope for a real intr */ 2109 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2110 2111 if (0 == descyl) { 2112 int failed = 0; 2113 /* 2114 * seek to cyl 0 requested; make sure we are 2115 * really there 2116 */ 2117 if (fd_sense_drive_status(fdc, &st3)) 2118 failed = 1; 2119 if ((st3 & NE7_ST3_T0) == 0) { 2120 printf( 2121 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 2122 fdu, st3, NE7_ST3BITS); 2123 failed = 1; 2124 } 2125 2126 if (failed) { 2127 if(fdc->retry < 3) 2128 fdc->retry = 3; 2129 return (retrier(fdc)); 2130 } 2131 } 2132 2133 if (cyl != descyl) { 2134 printf( 2135 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 2136 fdu, descyl, cyl, st0); 2137 if (fdc->retry < 3) 2138 fdc->retry = 3; 2139 return (retrier(fdc)); 2140 } 2141 } 2142 2143 fd->track = cylinder; 2144 if (format) 2145 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 2146 - (char *)finfo; 2147 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2148 isa_dmastart(idf, bp->bio_data+fd->skip, 2149 format ? bp->bio_bcount : fdblk, fdc->dmachan); 2150 blknum = bp->bio_pblkno + fd->skip / fdblk; 2151 sectrac = fd->ft->sectrac; 2152 sec = blknum % (sectrac * fd->ft->heads); 2153 head = sec / sectrac; 2154 sec = sec % sectrac + 1; 2155 if (head != 0 && fd->ft->offset_side2 != 0) 2156 sec += fd->ft->offset_side2; 2157 fd->hddrv = ((head&1)<<2)+fdu; 2158 2159 if(format || !(read || rdsectid)) 2160 { 2161 /* make sure the drive is writable */ 2162 if(fd_sense_drive_status(fdc, &st3) != 0) 2163 { 2164 /* stuck controller? */ 2165 if (!(fdc->flags & FDC_NODMA)) 2166 isa_dmadone(idf, 2167 bp->bio_data + fd->skip, 2168 format ? bp->bio_bcount : fdblk, 2169 fdc->dmachan); 2170 fdc->retry = 6; /* reset the beast */ 2171 return (retrier(fdc)); 2172 } 2173 if(st3 & NE7_ST3_WP) 2174 { 2175 /* 2176 * XXX YES! this is ugly. 2177 * in order to force the current operation 2178 * to fail, we will have to fake an FDC 2179 * error - all error handling is done 2180 * by the retrier() 2181 */ 2182 fdc->status[0] = NE7_ST0_IC_AT; 2183 fdc->status[1] = NE7_ST1_NW; 2184 fdc->status[2] = 0; 2185 fdc->status[3] = fd->track; 2186 fdc->status[4] = head; 2187 fdc->status[5] = sec; 2188 fdc->retry = 8; /* break out immediately */ 2189 fdc->state = IOTIMEDOUT; /* not really... */ 2190 return (1); /* will return immediately */ 2191 } 2192 } 2193 2194 if (format) { 2195 ne7cmd = NE7CMD_FORMAT | mfm; 2196 if (fdc->flags & FDC_NODMA) { 2197 /* 2198 * This seems to be necessary for 2199 * whatever obscure reason; if we omit 2200 * it, we end up filling the sector ID 2201 * fields of the newly formatted track 2202 * entirely with garbage, causing 2203 * `wrong cylinder' errors all over 2204 * the place when trying to read them 2205 * back. 2206 * 2207 * Umpf. 2208 */ 2209 SET_BCDR(fdc, 1, bp->bio_bcount, 0); 2210 2211 (void)fdcpio(fdc,bp->bio_cmd, 2212 bp->bio_data+fd->skip, 2213 bp->bio_bcount); 2214 2215 } 2216 /* formatting */ 2217 if(fd_cmd(fdc, 6, ne7cmd, head << 2 | fdu, 2218 finfo->fd_formb_secshift, 2219 finfo->fd_formb_nsecs, 2220 finfo->fd_formb_gaplen, 2221 finfo->fd_formb_fillbyte, 0)) { 2222 /* controller fell over */ 2223 if (!(fdc->flags & FDC_NODMA)) 2224 isa_dmadone(idf, 2225 bp->bio_data + fd->skip, 2226 format ? bp->bio_bcount : fdblk, 2227 fdc->dmachan); 2228 fdc->retry = 6; 2229 return (retrier(fdc)); 2230 } 2231 } else if (rdsectid) { 2232 ne7cmd = NE7CMD_READID | mfm; 2233 if (fd_cmd(fdc, 2, ne7cmd, head << 2 | fdu, 0)) { 2234 /* controller jamming */ 2235 fdc->retry = 6; 2236 return (retrier(fdc)); 2237 } 2238 } else { 2239 /* read or write operation */ 2240 ne7cmd = (read ? NE7CMD_READ | NE7CMD_SK : NE7CMD_WRITE) | mfm; 2241 if (fdc->flags & FDC_NODMA) { 2242 /* 2243 * This seems to be necessary even when 2244 * reading data. 2245 */ 2246 SET_BCDR(fdc, 1, fdblk, 0); 2247 2248 /* 2249 * Perform the write pseudo-DMA before 2250 * the WRITE command is sent. 2251 */ 2252 if (!read) 2253 (void)fdcpio(fdc,bp->bio_cmd, 2254 bp->bio_data+fd->skip, 2255 fdblk); 2256 } 2257 if (fd_cmd(fdc, 9, 2258 ne7cmd, 2259 head << 2 | fdu, /* head & unit */ 2260 fd->track, /* track */ 2261 head, 2262 sec, /* sector + 1 */ 2263 fd->ft->secsize, /* sector size */ 2264 sectrac, /* sectors/track */ 2265 fd->ft->gap, /* gap size */ 2266 fd->ft->datalen, /* data length */ 2267 0)) { 2268 /* the beast is sleeping again */ 2269 if (!(fdc->flags & FDC_NODMA)) 2270 isa_dmadone(idf, 2271 bp->bio_data + fd->skip, 2272 format ? bp->bio_bcount : fdblk, 2273 fdc->dmachan); 2274 fdc->retry = 6; 2275 return (retrier(fdc)); 2276 } 2277 } 2278 if (!rdsectid && (fdc->flags & FDC_NODMA)) 2279 /* 2280 * If this is a read, then simply await interrupt 2281 * before performing PIO. 2282 */ 2283 if (read && !fdcpio(fdc,bp->bio_cmd, 2284 bp->bio_data+fd->skip,fdblk)) { 2285 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2286 return(0); /* will return later */ 2287 } 2288 2289 /* 2290 * Write (or format) operation will fall through and 2291 * await completion interrupt. 2292 */ 2293 fdc->state = IOCOMPLETE; 2294 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2295 return (0); /* will return later */ 2296 2297 case PIOREAD: 2298 /* 2299 * Actually perform the PIO read. The IOCOMPLETE case 2300 * removes the timeout for us. 2301 */ 2302 (void)fdcpio(fdc,bp->bio_cmd,bp->bio_data+fd->skip,fdblk); 2303 fdc->state = IOCOMPLETE; 2304 /* FALLTHROUGH */ 2305 case IOCOMPLETE: /* IO done, post-analyze */ 2306 untimeout(fd_iotimeout, fdc, fd->tohandle); 2307 2308 if (fd_read_status(fdc)) { 2309 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2310 isa_dmadone(idf, bp->bio_data + fd->skip, 2311 format ? bp->bio_bcount : fdblk, 2312 fdc->dmachan); 2313 if (fdc->retry < 6) 2314 fdc->retry = 6; /* force a reset */ 2315 return (retrier(fdc)); 2316 } 2317 2318 fdc->state = IOTIMEDOUT; 2319 2320 /* FALLTHROUGH */ 2321 case IOTIMEDOUT: 2322 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2323 isa_dmadone(idf, bp->bio_data + fd->skip, 2324 format ? bp->bio_bcount : fdblk, fdc->dmachan); 2325 if (fdc->status[0] & NE7_ST0_IC) { 2326 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2327 && fdc->status[1] & NE7_ST1_OR) { 2328 /* 2329 * DMA overrun. Someone hogged the bus and 2330 * didn't release it in time for the next 2331 * FDC transfer. 2332 * 2333 * We normally restart this without bumping 2334 * the retry counter. However, in case 2335 * something is seriously messed up (like 2336 * broken hardware), we rather limit the 2337 * number of retries so the IO operation 2338 * doesn't block indefinately. 2339 */ 2340 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 2341 fdc->state = SEEKCOMPLETE; 2342 return (1);/* will return immediately */ 2343 } /* else fall through */ 2344 } 2345 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 2346 && fdc->retry < 6) 2347 fdc->retry = 6; /* force a reset */ 2348 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2349 && fdc->status[2] & NE7_ST2_WC 2350 && fdc->retry < 3) 2351 fdc->retry = 3; /* force recalibrate */ 2352 return (retrier(fdc)); 2353 } 2354 /* All OK */ 2355 if (rdsectid) { 2356 /* copy out ID field contents */ 2357 idp = (struct fdc_readid *)bp->bio_data; 2358 idp->cyl = fdc->status[3]; 2359 idp->head = fdc->status[4]; 2360 idp->sec = fdc->status[5]; 2361 idp->secshift = fdc->status[6]; 2362 } 2363 /* Operation successful, retry DMA overruns again next time. */ 2364 fdc->dma_overruns = 0; 2365 fd->skip += fdblk; 2366 if (!rdsectid && !format && fd->skip < bp->bio_bcount) { 2367 /* set up next transfer */ 2368 fdc->state = DOSEEK; 2369 } else { 2370 /* ALL DONE */ 2371 fd->skip = 0; 2372 bp->bio_resid = 0; 2373 fdc->bp = NULL; 2374 device_unbusy(fd->dev); 2375 biofinish(bp, fd->device_stats, 0); 2376 fdc->fd = (fd_p) 0; 2377 fdc->fdu = -1; 2378 fdc->state = FINDWORK; 2379 } 2380 return (1); /* will return immediately */ 2381 2382 case RESETCTLR: 2383 fdc_reset(fdc); 2384 fdc->retry++; 2385 fdc->state = RESETCOMPLETE; 2386 return (0); /* will return later */ 2387 2388 case RESETCOMPLETE: 2389 /* 2390 * Discard all the results from the reset so that they 2391 * can't cause an unexpected interrupt later. 2392 */ 2393 for (i = 0; i < 4; i++) 2394 (void)fd_sense_int(fdc, &st0, &cyl); 2395 fdc->state = STARTRECAL; 2396 /* FALLTHROUGH */ 2397 case STARTRECAL: 2398 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 2399 /* arrgl */ 2400 fdc->retry = 6; 2401 return (retrier(fdc)); 2402 } 2403 fdc->state = RECALWAIT; 2404 return (0); /* will return later */ 2405 2406 case RECALWAIT: 2407 /* allow heads to settle */ 2408 timeout(fd_pseudointr, fdc, hz / 8); 2409 fdc->state = RECALCOMPLETE; 2410 return (0); /* will return later */ 2411 2412 case RECALCOMPLETE: 2413 do { 2414 /* 2415 * See SEEKCOMPLETE for a comment on this: 2416 */ 2417 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2418 return (0); /* will return later */ 2419 if(fdc->fdct == FDC_NE765 2420 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2421 return (0); /* hope for a real intr */ 2422 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2423 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2424 { 2425 if(fdc->retry > 3) 2426 /* 2427 * A recalibrate from beyond cylinder 77 2428 * will "fail" due to the FDC limitations; 2429 * since people used to complain much about 2430 * the failure message, try not logging 2431 * this one if it seems to be the first 2432 * time in a line. 2433 */ 2434 printf("fd%d: recal failed ST0 %b cyl %d\n", 2435 fdu, st0, NE7_ST0BITS, cyl); 2436 if(fdc->retry < 3) fdc->retry = 3; 2437 return (retrier(fdc)); 2438 } 2439 fd->track = 0; 2440 /* Seek (probably) necessary */ 2441 fdc->state = DOSEEK; 2442 return (1); /* will return immediately */ 2443 2444 case MOTORWAIT: 2445 if(fd->flags & FD_MOTOR_WAIT) 2446 { 2447 return (0); /* time's not up yet */ 2448 } 2449 if (fdc->flags & FDC_NEEDS_RESET) { 2450 fdc->state = RESETCTLR; 2451 fdc->flags &= ~FDC_NEEDS_RESET; 2452 } else 2453 fdc->state = DOSEEK; 2454 return (1); /* will return immediately */ 2455 2456 default: 2457 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2458 if (fd_read_status(fdc) == 0) 2459 printf("FDC status :%x %x %x %x %x %x %x ", 2460 fdc->status[0], 2461 fdc->status[1], 2462 fdc->status[2], 2463 fdc->status[3], 2464 fdc->status[4], 2465 fdc->status[5], 2466 fdc->status[6] ); 2467 else 2468 printf("No status available "); 2469 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2470 { 2471 printf("[controller is dead now]\n"); 2472 return (0); /* will return later */ 2473 } 2474 printf("ST0 = %x, PCN = %x\n", st0, cyl); 2475 return (0); /* will return later */ 2476 } 2477 /* noone should ever get here */ 2478 } 2479 2480 static int 2481 retrier(struct fdc_data *fdc) 2482 { 2483 struct bio *bp; 2484 struct fd_data *fd; 2485 int fdu; 2486 2487 bp = fdc->bp; 2488 2489 /* XXX shouldn't this be cached somewhere? */ 2490 fdu = FDUNIT(minor(bp->bio_dev)); 2491 fd = devclass_get_softc(fd_devclass, fdu); 2492 if (fd->options & FDOPT_NORETRY) 2493 goto fail; 2494 2495 switch (fdc->retry) { 2496 case 0: case 1: case 2: 2497 fdc->state = SEEKCOMPLETE; 2498 break; 2499 case 3: case 4: case 5: 2500 fdc->state = STARTRECAL; 2501 break; 2502 case 6: 2503 fdc->state = RESETCTLR; 2504 break; 2505 case 7: 2506 break; 2507 default: 2508 fail: 2509 if ((fd->options & FDOPT_NOERRLOG) == 0) { 2510 disk_err(bp, "hard error", 2511 fdc->fd->skip / DEV_BSIZE, 0); 2512 if (fdc->flags & FDC_STAT_VALID) { 2513 printf( 2514 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2515 fdc->status[0], NE7_ST0BITS, 2516 fdc->status[1], NE7_ST1BITS, 2517 fdc->status[2], NE7_ST2BITS, 2518 fdc->status[3], fdc->status[4], 2519 fdc->status[5]); 2520 } 2521 else 2522 printf(" (No status)\n"); 2523 } 2524 if ((fd->options & FDOPT_NOERROR) == 0) { 2525 bp->bio_flags |= BIO_ERROR; 2526 bp->bio_error = EIO; 2527 bp->bio_resid = bp->bio_bcount - fdc->fd->skip; 2528 } else 2529 bp->bio_resid = 0; 2530 fdc->bp = NULL; 2531 fdc->fd->skip = 0; 2532 device_unbusy(fd->dev); 2533 biofinish(bp, fdc->fd->device_stats, 0); 2534 fdc->state = FINDWORK; 2535 fdc->flags |= FDC_NEEDS_RESET; 2536 fdc->fd = (fd_p) 0; 2537 fdc->fdu = -1; 2538 return (1); 2539 } 2540 fdc->retry++; 2541 return (1); 2542 } 2543 2544 static void 2545 fdbiodone(struct bio *bp) 2546 { 2547 wakeup(bp); 2548 } 2549 2550 static int 2551 fdmisccmd(dev_t dev, u_int cmd, void *data) 2552 { 2553 fdu_t fdu; 2554 fd_p fd; 2555 struct bio *bp; 2556 struct fd_formb *finfo; 2557 struct fdc_readid *idfield; 2558 size_t fdblk; 2559 int error; 2560 2561 fdu = FDUNIT(minor(dev)); 2562 fd = devclass_get_softc(fd_devclass, fdu); 2563 fdblk = 128 << fd->ft->secsize; 2564 finfo = (struct fd_formb *)data; 2565 idfield = (struct fdc_readid *)data; 2566 2567 bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO); 2568 2569 /* 2570 * Set up a bio request for fdstrategy(). bio_blkno is faked 2571 * so that fdstrategy() will seek to the the requested 2572 * cylinder, and use the desired head. 2573 */ 2574 bp->bio_cmd = cmd; 2575 if (cmd == FDBIO_FORMAT) { 2576 bp->bio_blkno = 2577 (finfo->cyl * (fd->ft->sectrac * fd->ft->heads) + 2578 finfo->head * fd->ft->sectrac) * 2579 fdblk / DEV_BSIZE; 2580 bp->bio_bcount = sizeof(struct fd_idfield_data) * 2581 finfo->fd_formb_nsecs; 2582 } else if (cmd == FDBIO_RDSECTID) { 2583 bp->bio_blkno = 2584 (idfield->cyl * (fd->ft->sectrac * fd->ft->heads) + 2585 idfield->head * fd->ft->sectrac) * 2586 fdblk / DEV_BSIZE; 2587 bp->bio_bcount = sizeof(struct fdc_readid); 2588 } else 2589 panic("wrong cmd in fdmisccmd()"); 2590 bp->bio_data = data; 2591 bp->bio_dev = dev; 2592 bp->bio_done = fdbiodone; 2593 bp->bio_flags = 0; 2594 2595 /* Now run the command. */ 2596 fdstrategy(bp); 2597 error = biowait(bp, "fdcmd"); 2598 2599 free(bp, M_TEMP); 2600 return (error); 2601 } 2602 2603 static int 2604 fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 2605 { 2606 fdu_t fdu; 2607 fd_p fd; 2608 struct fdc_status *fsp; 2609 struct fdc_readid *rid; 2610 size_t fdblk; 2611 int error, type; 2612 2613 fdu = FDUNIT(minor(dev)); 2614 type = FDTYPE(minor(dev)); 2615 fd = devclass_get_softc(fd_devclass, fdu); 2616 2617 /* 2618 * First, handle everything that could be done with 2619 * FD_NONBLOCK still being set. 2620 */ 2621 switch (cmd) { 2622 2623 case DIOCGMEDIASIZE: 2624 *(off_t *)addr = (128 << (fd->ft->secsize)) * fd->ft->size; 2625 return (0); 2626 2627 case DIOCGSECTORSIZE: 2628 *(u_int *)addr = 128 << (fd->ft->secsize); 2629 return (0); 2630 2631 case FIONBIO: 2632 if (*(int *)addr != 0) 2633 fd->flags |= FD_NONBLOCK; 2634 else { 2635 if (fd->ft == 0) { 2636 /* 2637 * No drive type has been selected yet, 2638 * cannot turn FNONBLOCK off. 2639 */ 2640 return (EINVAL); 2641 } 2642 fd->flags &= ~FD_NONBLOCK; 2643 } 2644 return (0); 2645 2646 case FIOASYNC: 2647 /* keep the generic fcntl() code happy */ 2648 return (0); 2649 2650 case FD_GTYPE: /* get drive type */ 2651 if (fd->ft == 0) 2652 /* no type known yet, return the native type */ 2653 *(struct fd_type *)addr = fd_native_types[fd->type]; 2654 else 2655 *(struct fd_type *)addr = *fd->ft; 2656 return (0); 2657 2658 case FD_STYPE: /* set drive type */ 2659 if (type == 0) { 2660 /* 2661 * Allow setting drive type temporarily iff 2662 * currently unset. Used for fdformat so any 2663 * user can set it, and then start formatting. 2664 */ 2665 if (fd->ft) 2666 return (EINVAL); /* already set */ 2667 fd->ft = fd->fts; 2668 *fd->ft = *(struct fd_type *)addr; 2669 fd->flags |= FD_UA; 2670 } else { 2671 /* 2672 * Set density definition permanently. Only 2673 * allow for superuser. 2674 */ 2675 if (suser(td) != 0) 2676 return (EPERM); 2677 fd->fts[type] = *(struct fd_type *)addr; 2678 } 2679 return (0); 2680 2681 case FD_GOPTS: /* get drive options */ 2682 *(int *)addr = fd->options + (type == 0? FDOPT_AUTOSEL: 0); 2683 return (0); 2684 2685 case FD_SOPTS: /* set drive options */ 2686 fd->options = *(int *)addr & ~FDOPT_AUTOSEL; 2687 return (0); 2688 2689 #ifdef FDC_DEBUG 2690 case FD_DEBUG: 2691 if ((fd_debug != 0) != (*(int *)addr != 0)) { 2692 fd_debug = (*(int *)addr != 0); 2693 printf("fd%d: debugging turned %s\n", 2694 fd->fdu, fd_debug ? "on" : "off"); 2695 } 2696 return (0); 2697 #endif 2698 2699 case FD_CLRERR: 2700 if (suser(td) != 0) 2701 return (EPERM); 2702 fd->fdc->fdc_errs = 0; 2703 return (0); 2704 2705 case FD_GSTAT: 2706 fsp = (struct fdc_status *)addr; 2707 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2708 return (EINVAL); 2709 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2710 return (0); 2711 2712 case FD_GDTYPE: 2713 *(enum fd_drivetype *)addr = fd->type; 2714 return (0); 2715 } 2716 2717 /* 2718 * Now handle everything else. Make sure we have a valid 2719 * drive type. 2720 */ 2721 if (fd->flags & FD_NONBLOCK) 2722 return (EAGAIN); 2723 if (fd->ft == 0) 2724 return (ENXIO); 2725 fdblk = 128 << fd->ft->secsize; 2726 error = 0; 2727 2728 switch (cmd) { 2729 2730 case FD_FORM: 2731 if ((flag & FWRITE) == 0) 2732 return (EBADF); /* must be opened for writing */ 2733 if (((struct fd_formb *)addr)->format_version != 2734 FD_FORMAT_VERSION) 2735 return (EINVAL); /* wrong version of formatting prog */ 2736 error = fdmisccmd(dev, FDBIO_FORMAT, addr); 2737 break; 2738 2739 case FD_GTYPE: /* get drive type */ 2740 *(struct fd_type *)addr = *fd->ft; 2741 break; 2742 2743 case FD_STYPE: /* set drive type */ 2744 /* this is considered harmful; only allow for superuser */ 2745 if (suser(td) != 0) 2746 return (EPERM); 2747 *fd->ft = *(struct fd_type *)addr; 2748 break; 2749 2750 case FD_GOPTS: /* get drive options */ 2751 *(int *)addr = fd->options; 2752 break; 2753 2754 case FD_SOPTS: /* set drive options */ 2755 fd->options = *(int *)addr; 2756 break; 2757 2758 #ifdef FDC_DEBUG 2759 case FD_DEBUG: 2760 if ((fd_debug != 0) != (*(int *)addr != 0)) { 2761 fd_debug = (*(int *)addr != 0); 2762 printf("fd%d: debugging turned %s\n", 2763 fd->fdu, fd_debug ? "on" : "off"); 2764 } 2765 break; 2766 #endif 2767 2768 case FD_CLRERR: 2769 if (suser(td) != 0) 2770 return (EPERM); 2771 fd->fdc->fdc_errs = 0; 2772 break; 2773 2774 case FD_GSTAT: 2775 fsp = (struct fdc_status *)addr; 2776 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2777 return (EINVAL); 2778 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2779 break; 2780 2781 case FD_READID: 2782 rid = (struct fdc_readid *)addr; 2783 if (rid->cyl > MAX_CYLINDER || rid->head > MAX_HEAD) 2784 return (EINVAL); 2785 error = fdmisccmd(dev, FDBIO_RDSECTID, addr); 2786 break; 2787 2788 default: 2789 error = ENOTTY; 2790 break; 2791 } 2792 return (error); 2793 }
Cache object: 10d2cd1b45271bf6b79db65191d32aac
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