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.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: src/sys/isa/fd.c,v 1.176.2.8 2002/05/15 21:56:14 joerg Exp $ 54 * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.24 2005/11/19 17:58:17 dillon Exp $ 55 * 56 */ 57 58 #include "opt_fdc.h" 59 #include "use_pccard.h" 60 61 #include <sys/param.h> 62 #include <sys/systm.h> 63 #include <sys/bootmaj.h> 64 #include <sys/kernel.h> 65 #include <sys/buf.h> 66 #include <sys/bus.h> 67 #include <sys/conf.h> 68 #include <sys/disklabel.h> 69 #include <sys/devicestat.h> 70 #include <sys/fcntl.h> 71 #include <sys/malloc.h> 72 #include <sys/module.h> 73 #include <sys/proc.h> 74 #include <sys/syslog.h> 75 #include <sys/device.h> 76 77 #include <sys/bus.h> 78 #include <machine/bus.h> 79 #include <sys/rman.h> 80 81 #include <sys/buf2.h> 82 #include <sys/thread2.h> 83 84 #include <machine/clock.h> 85 #include <machine/ioctl_fd.h> 86 #include <machine/resource.h> 87 #include <machine/stdarg.h> 88 89 #include <bus/isa/isavar.h> 90 #include <bus/isa/isareg.h> 91 #include "fdreg.h" 92 #include "fdc.h" 93 #include <bus/isa/rtc.h> 94 95 /* misuse a flag to identify format operation */ 96 #define B_FORMAT B_XXX 97 98 /* configuration flags */ 99 #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */ 100 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ 101 102 /* internally used only, not really from CMOS: */ 103 #define RTCFDT_144M_PRETENDED 0x1000 104 105 /* error returns for fd_cmd() */ 106 #define FD_FAILED -1 107 #define FD_NOT_VALID -2 108 #define FDC_ERRMAX 100 /* do not log more */ 109 /* 110 * Stop retrying after this many DMA overruns. Since each retry takes 111 * one revolution, with 300 rpm., 25 retries take approximately 10 112 * seconds which the read attempt will block in case the DMA overrun 113 * is persistent. 114 */ 115 #define FDC_DMAOV_MAX 25 116 117 /* 118 * Timeout value for the PIO loops to wait until the FDC main status 119 * register matches our expectations (request for master, direction 120 * bit). This is supposed to be a number of microseconds, although 121 * timing might actually not be very accurate. 122 * 123 * Timeouts of 100 msec are believed to be required for some broken 124 * (old) hardware. 125 */ 126 #define FDSTS_TIMEOUT 100000 127 128 #define NUMTYPES 17 129 #define NUMDENS (NUMTYPES - 7) 130 131 /* These defines (-1) must match index for fd_types */ 132 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */ 133 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */ 134 #define FD_1720 1 135 #define FD_1480 2 136 #define FD_1440 3 137 #define FD_1200 4 138 #define FD_820 5 139 #define FD_800 6 140 #define FD_720 7 141 #define FD_360 8 142 #define FD_640 9 143 #define FD_1232 10 144 145 #define FD_1480in5_25 11 146 #define FD_1440in5_25 12 147 #define FD_820in5_25 13 148 #define FD_800in5_25 14 149 #define FD_720in5_25 15 150 #define FD_360in5_25 16 151 #define FD_640in5_25 17 152 153 154 static struct fd_type fd_types[NUMTYPES] = 155 { 156 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */ 157 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */ 158 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */ 159 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */ 160 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */ 161 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */ 162 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */ 163 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */ 164 { 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */ 165 { 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */ 166 167 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */ 168 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */ 169 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */ 170 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */ 171 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */ 172 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */ 173 { 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */ 174 }; 175 176 #define DRVS_PER_CTLR 2 /* 2 floppies */ 177 178 /***********************************************************************\ 179 * Per controller structure. * 180 \***********************************************************************/ 181 devclass_t fdc_devclass; 182 183 /***********************************************************************\ 184 * Per drive structure. * 185 * N per controller (DRVS_PER_CTLR) * 186 \***********************************************************************/ 187 struct fd_data { 188 struct fdc_data *fdc; /* pointer to controller structure */ 189 int fdsu; /* this units number on this controller */ 190 int type; /* Drive type (FD_1440...) */ 191 struct fd_type *ft; /* pointer to the type descriptor */ 192 int flags; 193 #define FD_OPEN 0x01 /* it's open */ 194 #define FD_ACTIVE 0x02 /* it's active */ 195 #define FD_MOTOR 0x04 /* motor should be on */ 196 #define FD_MOTOR_WAIT 0x08 /* motor coming up */ 197 int skip; 198 int hddrv; 199 #define FD_NO_TRACK -2 200 int track; /* where we think the head is */ 201 int options; /* user configurable options, see ioctl_fd.h */ 202 struct callout toffhandle; 203 struct callout tohandle; 204 struct callout motor; 205 struct devstat device_stats; 206 device_t dev; 207 fdu_t fdu; 208 }; 209 210 struct fdc_ivars { 211 int fdunit; 212 }; 213 static devclass_t fd_devclass; 214 215 /***********************************************************************\ 216 * Throughout this file the following conventions will be used: * 217 * fd is a pointer to the fd_data struct for the drive in question * 218 * fdc is a pointer to the fdc_data struct for the controller * 219 * fdu is the floppy drive unit number * 220 * fdcu is the floppy controller unit number * 221 * fdsu is the floppy drive unit number on that controller. (sub-unit) * 222 \***********************************************************************/ 223 224 /* internal functions */ 225 static void fdc_intr(void *); 226 static void set_motor(struct fdc_data *, int, int); 227 # define TURNON 1 228 # define TURNOFF 0 229 static timeout_t fd_turnoff; 230 static timeout_t fd_motor_on; 231 static void fd_turnon(struct fd_data *); 232 static void fdc_reset(fdc_p); 233 static int fd_in(struct fdc_data *, int *); 234 static int out_fdc(struct fdc_data *, int); 235 static void fdstart(struct fdc_data *); 236 static timeout_t fd_iotimeout; 237 static timeout_t fd_pseudointr; 238 static int fdstate(struct fdc_data *); 239 static int retrier(struct fdc_data *); 240 static int fdformat(dev_t, struct fd_formb *, struct thread *); 241 242 static int enable_fifo(fdc_p fdc); 243 244 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 245 246 247 #define DEVIDLE 0 248 #define FINDWORK 1 249 #define DOSEEK 2 250 #define SEEKCOMPLETE 3 251 #define IOCOMPLETE 4 252 #define RECALCOMPLETE 5 253 #define STARTRECAL 6 254 #define RESETCTLR 7 255 #define SEEKWAIT 8 256 #define RECALWAIT 9 257 #define MOTORWAIT 10 258 #define IOTIMEDOUT 11 259 #define RESETCOMPLETE 12 260 #define PIOREAD 13 261 262 #ifdef FDC_DEBUG 263 static char const * const fdstates[] = 264 { 265 "DEVIDLE", 266 "FINDWORK", 267 "DOSEEK", 268 "SEEKCOMPLETE", 269 "IOCOMPLETE", 270 "RECALCOMPLETE", 271 "STARTRECAL", 272 "RESETCTLR", 273 "SEEKWAIT", 274 "RECALWAIT", 275 "MOTORWAIT", 276 "IOTIMEDOUT", 277 "RESETCOMPLETE", 278 "PIOREAD", 279 }; 280 281 /* CAUTION: fd_debug causes huge amounts of logging output */ 282 static int volatile fd_debug = 0; 283 #define TRACE0(arg) if(fd_debug) printf(arg) 284 #define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2) 285 #else /* FDC_DEBUG */ 286 #define TRACE0(arg) 287 #define TRACE1(arg1, arg2) 288 #endif /* FDC_DEBUG */ 289 290 void 291 fdout_wr(fdc_p fdc, u_int8_t v) 292 { 293 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 294 } 295 296 static u_int8_t 297 fdsts_rd(fdc_p fdc) 298 { 299 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 300 } 301 302 static void 303 fddata_wr(fdc_p fdc, u_int8_t v) 304 { 305 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 306 } 307 308 static u_int8_t 309 fddata_rd(fdc_p fdc) 310 { 311 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 312 } 313 314 static void 315 fdctl_wr_isa(fdc_p fdc, u_int8_t v) 316 { 317 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 318 } 319 320 #if 0 321 322 static u_int8_t 323 fdin_rd(fdc_p fdc) 324 { 325 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 326 } 327 328 #endif 329 330 static d_open_t Fdopen; /* NOTE, not fdopen */ 331 static d_close_t fdclose; 332 static d_ioctl_t fdioctl; 333 static d_strategy_t fdstrategy; 334 335 static struct cdevsw fd_cdevsw = { 336 /* name */ "fd", 337 /* maj */ FD_CDEV_MAJOR, 338 /* flags */ D_DISK, 339 /* port */ NULL, 340 /* clone */ NULL, 341 342 /* open */ Fdopen, 343 /* close */ fdclose, 344 /* read */ physread, 345 /* write */ physwrite, 346 /* ioctl */ fdioctl, 347 /* poll */ nopoll, 348 /* mmap */ nommap, 349 /* strategy */ fdstrategy, 350 /* dump */ nodump, 351 /* psize */ nopsize 352 }; 353 354 static int 355 fdc_err(struct fdc_data *fdc, const char *s) 356 { 357 fdc->fdc_errs++; 358 if (s) { 359 if (fdc->fdc_errs < FDC_ERRMAX) 360 device_printf(fdc->fdc_dev, "%s", s); 361 else if (fdc->fdc_errs == FDC_ERRMAX) 362 device_printf(fdc->fdc_dev, "too many errors, not " 363 "logging any more\n"); 364 } 365 366 return FD_FAILED; 367 } 368 369 /* 370 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 371 * Unit number, 372 * # of output bytes, output bytes as ints ..., 373 * # of input bytes, input bytes as ints ... 374 */ 375 int 376 fd_cmd(struct fdc_data *fdc, int n_out, ...) 377 { 378 u_char cmd; 379 int n_in; 380 int n; 381 __va_list ap; 382 383 __va_start(ap, n_out); 384 cmd = (u_char)(__va_arg(ap, int)); 385 __va_end(ap); 386 __va_start(ap, n_out); 387 for (n = 0; n < n_out; n++) 388 { 389 if (out_fdc(fdc, __va_arg(ap, int)) < 0) 390 { 391 char msg[50]; 392 snprintf(msg, sizeof(msg), 393 "cmd %x failed at out byte %d of %d\n", 394 cmd, n + 1, n_out); 395 return fdc_err(fdc, msg); 396 } 397 } 398 n_in = __va_arg(ap, int); 399 for (n = 0; n < n_in; n++) 400 { 401 int *ptr = __va_arg(ap, int *); 402 if (fd_in(fdc, ptr) < 0) 403 { 404 char msg[50]; 405 snprintf(msg, sizeof(msg), 406 "cmd %02x failed at in byte %d of %d\n", 407 cmd, n + 1, n_in); 408 return fdc_err(fdc, msg); 409 } 410 } 411 412 return 0; 413 } 414 415 static int 416 enable_fifo(fdc_p fdc) 417 { 418 int i, j; 419 420 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 421 422 /* 423 * XXX: 424 * Cannot use fd_cmd the normal way here, since 425 * this might be an invalid command. Thus we send the 426 * first byte, and check for an early turn of data directon. 427 */ 428 429 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 430 return fdc_err(fdc, "Enable FIFO failed\n"); 431 432 /* If command is invalid, return */ 433 j = FDSTS_TIMEOUT; 434 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 435 != NE7_RQM && j-- > 0) { 436 if (i == (NE7_DIO | NE7_RQM)) { 437 fdc_reset(fdc); 438 return FD_FAILED; 439 } 440 DELAY(1); 441 } 442 if (j<0 || 443 fd_cmd(fdc, 3, 444 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 445 fdc_reset(fdc); 446 return fdc_err(fdc, "Enable FIFO failed\n"); 447 } 448 fdc->flags |= FDC_HAS_FIFO; 449 return 0; 450 } 451 if (fd_cmd(fdc, 4, 452 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 453 return fdc_err(fdc, "Re-enable FIFO failed\n"); 454 return 0; 455 } 456 457 static int 458 fd_sense_drive_status(fdc_p fdc, int *st3p) 459 { 460 int st3; 461 462 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 463 { 464 return fdc_err(fdc, "Sense Drive Status failed\n"); 465 } 466 if (st3p) 467 *st3p = st3; 468 469 return 0; 470 } 471 472 static int 473 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 474 { 475 int cyl, st0, ret; 476 477 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 478 if (ret) { 479 (void)fdc_err(fdc, 480 "sense intr err reading stat reg 0\n"); 481 return ret; 482 } 483 484 if (st0p) 485 *st0p = st0; 486 487 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 488 /* 489 * There doesn't seem to have been an interrupt. 490 */ 491 return FD_NOT_VALID; 492 } 493 494 if (fd_in(fdc, &cyl) < 0) { 495 return fdc_err(fdc, "can't get cyl num\n"); 496 } 497 498 if (cylp) 499 *cylp = cyl; 500 501 return 0; 502 } 503 504 505 static int 506 fd_read_status(fdc_p fdc, int fdsu) 507 { 508 int i, ret; 509 510 for (i = 0; i < 7; i++) { 511 /* 512 * XXX types are poorly chosen. Only bytes can by read 513 * from the hardware, but fdc->status[] wants u_ints and 514 * fd_in() gives ints. 515 */ 516 int status; 517 518 ret = fd_in(fdc, &status); 519 fdc->status[i] = status; 520 if (ret != 0) 521 break; 522 } 523 524 if (ret == 0) 525 fdc->flags |= FDC_STAT_VALID; 526 else 527 fdc->flags &= ~FDC_STAT_VALID; 528 529 return ret; 530 } 531 532 /****************************************************************************/ 533 /* autoconfiguration stuff */ 534 /****************************************************************************/ 535 536 int 537 fdc_alloc_resources(struct fdc_data *fdc) 538 { 539 device_t dev; 540 int ispnp, ispcmcia; 541 542 dev = fdc->fdc_dev; 543 ispnp = (fdc->flags & FDC_ISPNP) != 0; 544 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 545 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 546 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 547 548 /* 549 * On standard ISA, we don't just use an 8 port range 550 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 551 * register at 0x3f6. 552 * 553 * Isn't PC hardware wonderful. 554 * 555 * The Y-E Data PCMCIA FDC doesn't have this problem, it 556 * uses the register with offset 6 for pseudo-DMA, and the 557 * one with offset 7 as control register. 558 */ 559 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 560 &fdc->rid_ioport, 0ul, ~0ul, 561 ispcmcia ? 8 : (ispnp ? 1 : 6), 562 RF_ACTIVE); 563 if (fdc->res_ioport == 0) { 564 device_printf(dev, "cannot reserve I/O port range\n"); 565 return ENXIO; 566 } 567 fdc->portt = rman_get_bustag(fdc->res_ioport); 568 fdc->porth = rman_get_bushandle(fdc->res_ioport); 569 570 if (!ispcmcia) { 571 /* 572 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 573 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 574 * by checking the size and adjust the port address 575 * accordingly. 576 */ 577 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 578 fdc->port_off = -2; 579 580 /* 581 * Register the control port range as rid 1 if it 582 * isn't there already. Most PnP BIOSen will have 583 * already done this but non-PnP configurations don't. 584 * 585 * And some (!!) report 0x3f2-0x3f5 and completely 586 * leave out the control register! It seems that some 587 * non-antique controller chips have a different 588 * method of programming the transfer speed which 589 * doesn't require the control register, but it's 590 * mighty bogus as the chip still responds to the 591 * address for the control register. 592 */ 593 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 594 u_long ctlstart; 595 596 /* Find the control port, usually 0x3f7 */ 597 ctlstart = rman_get_start(fdc->res_ioport) + 598 fdc->port_off + 7; 599 600 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); 601 } 602 603 /* 604 * Now (finally!) allocate the control port. 605 */ 606 fdc->rid_ctl = 1; 607 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 608 &fdc->rid_ctl, 609 0ul, ~0ul, 1, RF_ACTIVE); 610 if (fdc->res_ctl == 0) { 611 device_printf(dev, 612 "cannot reserve control I/O port range\n"); 613 return ENXIO; 614 } 615 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 616 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 617 } 618 619 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 620 &fdc->rid_irq, 0ul, ~0ul, 1, 621 RF_ACTIVE); 622 if (fdc->res_irq == 0) { 623 device_printf(dev, "cannot reserve interrupt line\n"); 624 return ENXIO; 625 } 626 627 if ((fdc->flags & FDC_NODMA) == 0) { 628 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 629 &fdc->rid_drq, 0ul, ~0ul, 1, 630 RF_ACTIVE); 631 if (fdc->res_drq == 0) { 632 device_printf(dev, "cannot reserve DMA request line\n"); 633 return ENXIO; 634 } 635 fdc->dmachan = fdc->res_drq->r_start; 636 } 637 638 return 0; 639 } 640 641 void 642 fdc_release_resources(struct fdc_data *fdc) 643 { 644 device_t dev; 645 646 dev = fdc->fdc_dev; 647 if (fdc->res_irq != 0) { 648 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 649 fdc->res_irq); 650 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 651 fdc->res_irq); 652 } 653 if (fdc->res_ctl != 0) { 654 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 655 fdc->res_ctl); 656 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 657 fdc->res_ctl); 658 } 659 if (fdc->res_ioport != 0) { 660 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 661 fdc->res_ioport); 662 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 663 fdc->res_ioport); 664 } 665 if (fdc->res_drq != 0) { 666 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 667 fdc->res_drq); 668 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 669 fdc->res_drq); 670 } 671 } 672 673 /****************************************************************************/ 674 /* autoconfiguration stuff */ 675 /****************************************************************************/ 676 677 static struct isa_pnp_id fdc_ids[] = { 678 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 679 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 680 {0} 681 }; 682 683 int 684 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result) 685 { 686 struct fdc_ivars *ivars = device_get_ivars(child); 687 688 switch (which) { 689 case FDC_IVAR_FDUNIT: 690 *result = ivars->fdunit; 691 break; 692 default: 693 return ENOENT; 694 } 695 return 0; 696 } 697 698 /* 699 * fdc controller section. 700 */ 701 static int 702 fdc_probe(device_t dev) 703 { 704 int error, ic_type; 705 struct fdc_data *fdc; 706 707 fdc = device_get_softc(dev); 708 bzero(fdc, sizeof *fdc); 709 fdc->fdc_dev = dev; 710 fdc->fdctl_wr = fdctl_wr_isa; 711 712 /* Check pnp ids */ 713 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 714 if (error == ENXIO) 715 return ENXIO; 716 if (error == 0) 717 fdc->flags |= FDC_ISPNP; 718 719 /* Attempt to allocate our resources for the duration of the probe */ 720 error = fdc_alloc_resources(fdc); 721 if (error) 722 goto out; 723 724 /* First - lets reset the floppy controller */ 725 fdout_wr(fdc, 0); 726 DELAY(100); 727 fdout_wr(fdc, FDO_FRST); 728 729 /* see if it can handle a command */ 730 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 731 NE7_SPEC_2(2, 0), 0)) { 732 error = ENXIO; 733 goto out; 734 } 735 736 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 737 ic_type = (u_char)ic_type; 738 switch (ic_type) { 739 case 0x80: 740 device_set_desc(dev, "NEC 765 or clone"); 741 fdc->fdct = FDC_NE765; 742 break; 743 case 0x81: 744 device_set_desc(dev, "Intel 82077 or clone"); 745 fdc->fdct = FDC_I82077; 746 break; 747 case 0x90: 748 device_set_desc(dev, "NEC 72065B or clone"); 749 fdc->fdct = FDC_NE72065; 750 break; 751 default: 752 device_set_desc(dev, "generic floppy controller"); 753 fdc->fdct = FDC_UNKNOWN; 754 break; 755 } 756 } 757 758 out: 759 fdc_release_resources(fdc); 760 return (error); 761 } 762 763 /* 764 * Add a child device to the fdc controller. It will then be probed etc. 765 */ 766 static void 767 fdc_add_child(device_t dev, const char *name, int unit) 768 { 769 int disabled; 770 struct fdc_ivars *ivar; 771 device_t child; 772 773 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO); 774 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 775 ivar->fdunit = 0; 776 child = device_add_child(dev, name, unit); 777 if (child == NULL) 778 return; 779 device_set_ivars(child, ivar); 780 if (resource_int_value(name, unit, "disabled", &disabled) == 0 781 && disabled != 0) 782 device_disable(child); 783 } 784 785 int 786 fdc_attach(device_t dev) 787 { 788 struct fdc_data *fdc; 789 int i, error; 790 791 fdc = device_get_softc(dev); 792 793 callout_init(&fdc->pseudointr_ch); 794 795 error = fdc_alloc_resources(fdc); 796 if (error) { 797 device_printf(dev, "cannot re-aquire resources\n"); 798 return error; 799 } 800 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 801 0, fdc_intr, fdc, 802 &fdc->fdc_intr, NULL); 803 if (error) { 804 device_printf(dev, "cannot setup interrupt\n"); 805 return error; 806 } 807 fdc->fdcu = device_get_unit(dev); 808 fdc->flags |= FDC_ATTACHED; 809 810 if ((fdc->flags & FDC_NODMA) == 0) { 811 /* Acquire the DMA channel forever, The driver will do the rest */ 812 /* XXX should integrate with rman */ 813 isa_dma_acquire(fdc->dmachan); 814 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */); 815 } 816 fdc->state = DEVIDLE; 817 818 /* reset controller, turn motor off, clear fdout mirror reg */ 819 fdout_wr(fdc, ((fdc->fdout = 0))); 820 bufq_init(&fdc->head); 821 822 /* 823 * Probe and attach any children. We should probably detect 824 * devices from the BIOS unless overridden. 825 */ 826 for (i = resource_query_string(-1, "at", device_get_nameunit(dev)); 827 i != -1; 828 i = resource_query_string(i, "at", device_get_nameunit(dev))) 829 fdc_add_child(dev, resource_query_name(i), 830 resource_query_unit(i)); 831 832 return (bus_generic_attach(dev)); 833 } 834 835 int 836 fdc_print_child(device_t me, device_t child) 837 { 838 int retval = 0; 839 840 retval += bus_print_child_header(me, child); 841 retval += printf(" on %s drive %d\n", device_get_nameunit(me), 842 fdc_get_fdunit(child)); 843 844 return (retval); 845 } 846 847 static device_method_t fdc_methods[] = { 848 /* Device interface */ 849 DEVMETHOD(device_probe, fdc_probe), 850 DEVMETHOD(device_attach, fdc_attach), 851 DEVMETHOD(device_detach, bus_generic_detach), 852 DEVMETHOD(device_shutdown, bus_generic_shutdown), 853 DEVMETHOD(device_suspend, bus_generic_suspend), 854 DEVMETHOD(device_resume, bus_generic_resume), 855 856 /* Bus interface */ 857 DEVMETHOD(bus_print_child, fdc_print_child), 858 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 859 /* Our children never use any other bus interface methods. */ 860 861 { 0, 0 } 862 }; 863 864 static driver_t fdc_driver = { 865 "fdc", 866 fdc_methods, 867 sizeof(struct fdc_data) 868 }; 869 870 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 871 872 /******************************************************************/ 873 /* 874 * devices attached to the controller section. 875 */ 876 static int 877 fd_probe(device_t dev) 878 { 879 int i; 880 u_int fdt, st0, st3; 881 struct fd_data *fd; 882 struct fdc_data *fdc; 883 fdsu_t fdsu; 884 static int fd_fifo = 0; 885 886 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 887 fd = device_get_softc(dev); 888 fdc = device_get_softc(device_get_parent(dev)); 889 890 bzero(fd, sizeof *fd); 891 fd->dev = dev; 892 fd->fdc = fdc; 893 fd->fdsu = fdsu; 894 fd->fdu = device_get_unit(dev); 895 896 #ifdef __i386__ 897 /* look up what bios thinks we have */ 898 switch (fd->fdu) { 899 case 0: 900 if ((fdc->flags & FDC_ISPCMCIA)) 901 fdt = RTCFDT_144M; 902 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0) 903 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED; 904 else 905 fdt = (rtcin(RTC_FDISKETTE) & 0xf0); 906 break; 907 case 1: 908 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0); 909 break; 910 default: 911 fdt = RTCFDT_NONE; 912 break; 913 } 914 #else 915 fdt = RTCFDT_144M; /* XXX probably */ 916 #endif 917 918 /* is there a unit? */ 919 if (fdt == RTCFDT_NONE) 920 return (ENXIO); 921 922 /* select it */ 923 set_motor(fdc, fdsu, TURNON); 924 DELAY(1000000); /* 1 sec */ 925 926 /* XXX This doesn't work before the first set_motor() */ 927 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN 928 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 929 && enable_fifo(fdc) == 0) { 930 device_printf(device_get_parent(dev), 931 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 932 } 933 fd_fifo = 1; 934 935 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) 936 && (st3 & NE7_ST3_T0)) { 937 /* if at track 0, first seek inwards */ 938 /* seek some steps: */ 939 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0); 940 DELAY(300000); /* ...wait a moment... */ 941 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */ 942 } 943 944 /* If we're at track 0 first seek inwards. */ 945 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) { 946 /* Seek some steps... */ 947 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 948 /* ...wait a moment... */ 949 DELAY(300000); 950 /* make ctrlr happy: */ 951 fd_sense_int(fdc, 0, 0); 952 } 953 } 954 955 for (i = 0; i < 2; i++) { 956 /* 957 * we must recalibrate twice, just in case the 958 * heads have been beyond cylinder 76, since most 959 * FDCs still barf when attempting to recalibrate 960 * more than 77 steps 961 */ 962 /* go back to 0: */ 963 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 964 /* a second being enough for full stroke seek*/ 965 DELAY(i == 0 ? 1000000 : 300000); 966 967 /* anything responding? */ 968 if (fd_sense_int(fdc, &st0, 0) == 0 && 969 (st0 & NE7_ST0_EC) == 0) 970 break; /* already probed succesfully */ 971 } 972 } 973 974 set_motor(fdc, fdsu, TURNOFF); 975 976 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */ 977 return (ENXIO); 978 979 fd->track = FD_NO_TRACK; 980 fd->fdc = fdc; 981 fd->fdsu = fdsu; 982 fd->options = 0; 983 callout_init(&fd->toffhandle); 984 callout_init(&fd->tohandle); 985 callout_init(&fd->motor); 986 987 switch (fdt) { 988 case RTCFDT_12M: 989 device_set_desc(dev, "1200-KB 5.25\" drive"); 990 fd->type = FD_1200; 991 break; 992 case RTCFDT_144M | RTCFDT_144M_PRETENDED: 993 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive"); 994 fdt = RTCFDT_144M; 995 fd->type = FD_1440; 996 case RTCFDT_144M: 997 device_set_desc(dev, "1440-KB 3.5\" drive"); 998 fd->type = FD_1440; 999 break; 1000 case RTCFDT_288M: 1001 case RTCFDT_288M_1: 1002 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 1003 fd->type = FD_1440; 1004 break; 1005 case RTCFDT_360K: 1006 device_set_desc(dev, "360-KB 5.25\" drive"); 1007 fd->type = FD_360; 1008 break; 1009 case RTCFDT_720K: 1010 printf("720-KB 3.5\" drive"); 1011 fd->type = FD_720; 1012 break; 1013 default: 1014 return (ENXIO); 1015 } 1016 return (0); 1017 } 1018 1019 static int 1020 fd_attach(device_t dev) 1021 { 1022 struct fd_data *fd; 1023 #if 0 1024 int i; 1025 int mynor; 1026 int typemynor; 1027 int typesize; 1028 #endif 1029 1030 fd = device_get_softc(dev); 1031 1032 cdevsw_add(&fd_cdevsw, -1 << 6, fd->fdu << 6); 1033 make_dev(&fd_cdevsw, (fd->fdu << 6), 1034 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu); 1035 1036 #if 0 1037 /* Other make_dev() go here. */ 1038 #endif 1039 1040 /* 1041 * Export the drive to the devstat interface. 1042 */ 1043 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1044 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS, 1045 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1046 DEVSTAT_PRIORITY_FD); 1047 return (0); 1048 } 1049 1050 static int 1051 fd_detach(device_t dev) 1052 { 1053 struct fd_data *fd; 1054 1055 fd = device_get_softc(dev); 1056 callout_stop(&fd->toffhandle); 1057 callout_stop(&fd->motor); 1058 1059 return (0); 1060 } 1061 1062 static device_method_t fd_methods[] = { 1063 /* Device interface */ 1064 DEVMETHOD(device_probe, fd_probe), 1065 DEVMETHOD(device_attach, fd_attach), 1066 DEVMETHOD(device_detach, fd_detach), 1067 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1068 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1069 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1070 1071 { 0, 0 } 1072 }; 1073 1074 static driver_t fd_driver = { 1075 "fd", 1076 fd_methods, 1077 sizeof(struct fd_data) 1078 }; 1079 1080 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1081 1082 /****************************************************************************/ 1083 /* motor control stuff */ 1084 /* remember to not deselect the drive we're working on */ 1085 /****************************************************************************/ 1086 static void 1087 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1088 { 1089 int fdout = fdc->fdout; 1090 int needspecify = 0; 1091 1092 if(turnon) { 1093 fdout &= ~FDO_FDSEL; 1094 fdout |= (FDO_MOEN0 << fdsu) + fdsu; 1095 } else 1096 fdout &= ~(FDO_MOEN0 << fdsu); 1097 1098 if(!turnon 1099 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0) 1100 /* gonna turn off the last drive, put FDC to bed */ 1101 fdout &= ~ (FDO_FRST|FDO_FDMAEN); 1102 else { 1103 /* make sure controller is selected and specified */ 1104 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0) 1105 needspecify = 1; 1106 fdout |= (FDO_FRST|FDO_FDMAEN); 1107 } 1108 1109 fdout_wr(fdc, fdout); 1110 fdc->fdout = fdout; 1111 TRACE1("[0x%x->FDOUT]", fdout); 1112 1113 if (needspecify) { 1114 /* 1115 * XXX 1116 * special case: since we have just woken up the FDC 1117 * from its sleep, we silently assume the command will 1118 * be accepted, and do not test for a timeout 1119 */ 1120 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1121 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1122 0); 1123 if (fdc->flags & FDC_HAS_FIFO) 1124 (void) enable_fifo(fdc); 1125 } 1126 } 1127 1128 static void 1129 fd_turnoff(void *xfd) 1130 { 1131 fd_p fd = xfd; 1132 1133 TRACE1("[fd%d: turnoff]", fd->fdu); 1134 1135 crit_enter(); 1136 /* 1137 * Don't turn off the motor yet if the drive is active. 1138 * 1139 * If we got here, this could only mean we missed an interrupt. 1140 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1141 * after a controller reset. Just schedule a pseudo-interrupt 1142 * so the state machine gets re-entered. 1143 */ 1144 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1145 fdc_intr(fd->fdc); 1146 crit_exit(); 1147 return; 1148 } 1149 1150 fd->flags &= ~FD_MOTOR; 1151 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1152 crit_exit(); 1153 } 1154 1155 static void 1156 fd_motor_on(void *xfd) 1157 { 1158 fd_p fd = xfd; 1159 1160 crit_enter(); 1161 fd->flags &= ~FD_MOTOR_WAIT; 1162 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1163 { 1164 fdc_intr(fd->fdc); 1165 } 1166 crit_exit(); 1167 } 1168 1169 static void 1170 fd_turnon(fd_p fd) 1171 { 1172 if(!(fd->flags & FD_MOTOR)) 1173 { 1174 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1175 set_motor(fd->fdc, fd->fdsu, TURNON); 1176 callout_reset(&fd->motor, hz, fd_motor_on, fd); 1177 } 1178 } 1179 1180 static void 1181 fdc_reset(fdc_p fdc) 1182 { 1183 /* Try a reset, keep motor on */ 1184 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1185 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1186 DELAY(100); 1187 /* enable FDC, but defer interrupts a moment */ 1188 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1189 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1190 DELAY(100); 1191 fdout_wr(fdc, fdc->fdout); 1192 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1193 1194 /* XXX after a reset, silently believe the FDC will accept commands */ 1195 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1196 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1197 0); 1198 if (fdc->flags & FDC_HAS_FIFO) 1199 (void) enable_fifo(fdc); 1200 } 1201 1202 /****************************************************************************/ 1203 /* fdc in/out */ 1204 /****************************************************************************/ 1205 /* 1206 * FDC IO functions, take care of the main status register, timeout 1207 * in case the desired status bits are never set. 1208 * 1209 * These PIO loops initially start out with short delays between 1210 * each iteration in the expectation that the required condition 1211 * is usually met quickly, so it can be handled immediately. After 1212 * about 1 ms, stepping is increased to achieve a better timing 1213 * accuracy in the calls to DELAY(). 1214 */ 1215 static int 1216 fd_in(struct fdc_data *fdc, int *ptr) 1217 { 1218 int i, j, step; 1219 1220 for (j = 0, step = 1; 1221 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) && 1222 j < FDSTS_TIMEOUT; 1223 j += step) { 1224 if (i == NE7_RQM) 1225 return (fdc_err(fdc, "ready for output in input\n")); 1226 if (j == 1000) 1227 step = 1000; 1228 DELAY(step); 1229 } 1230 if (j >= FDSTS_TIMEOUT) 1231 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); 1232 #ifdef FDC_DEBUG 1233 i = fddata_rd(fdc); 1234 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1235 *ptr = i; 1236 return (0); 1237 #else /* !FDC_DEBUG */ 1238 i = fddata_rd(fdc); 1239 if (ptr) 1240 *ptr = i; 1241 return (0); 1242 #endif /* FDC_DEBUG */ 1243 } 1244 1245 static int 1246 out_fdc(struct fdc_data *fdc, int x) 1247 { 1248 int i, j, step; 1249 1250 for (j = 0, step = 1; 1251 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM && 1252 j < FDSTS_TIMEOUT; 1253 j += step) { 1254 if (i == (NE7_DIO|NE7_RQM)) 1255 return (fdc_err(fdc, "ready for input in output\n")); 1256 if (j == 1000) 1257 step = 1000; 1258 DELAY(step); 1259 } 1260 if (j >= FDSTS_TIMEOUT) 1261 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); 1262 1263 /* Send the command and return */ 1264 fddata_wr(fdc, x); 1265 TRACE1("[0x%x->FDDATA]", x); 1266 return (0); 1267 } 1268 1269 /****************************************************************************/ 1270 /* fdopen/fdclose */ 1271 /****************************************************************************/ 1272 int 1273 Fdopen(dev_t dev, int flags, int mode, struct thread *td) 1274 { 1275 fdu_t fdu = FDUNIT(minor(dev)); 1276 int type = FDTYPE(minor(dev)); 1277 fd_p fd; 1278 fdc_p fdc; 1279 1280 /* check bounds */ 1281 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1282 return (ENXIO); 1283 fdc = fd->fdc; 1284 if ((fdc == NULL) || (fd->type == NO_TYPE)) 1285 return (ENXIO); 1286 if (type > NUMDENS) 1287 return (ENXIO); 1288 if (type == 0) 1289 type = fd->type; 1290 else { 1291 /* 1292 * For each type of basic drive, make sure we are trying 1293 * to open a type it can do, 1294 */ 1295 if (type != fd->type) { 1296 switch (fd->type) { 1297 case FD_360: 1298 return (ENXIO); 1299 case FD_720: 1300 if ( type != FD_820 1301 && type != FD_800 1302 && type != FD_640 1303 ) 1304 return (ENXIO); 1305 break; 1306 case FD_1200: 1307 switch (type) { 1308 case FD_1480: 1309 type = FD_1480in5_25; 1310 break; 1311 case FD_1440: 1312 type = FD_1440in5_25; 1313 break; 1314 case FD_1232: 1315 break; 1316 case FD_820: 1317 type = FD_820in5_25; 1318 break; 1319 case FD_800: 1320 type = FD_800in5_25; 1321 break; 1322 case FD_720: 1323 type = FD_720in5_25; 1324 break; 1325 case FD_640: 1326 type = FD_640in5_25; 1327 break; 1328 case FD_360: 1329 type = FD_360in5_25; 1330 break; 1331 default: 1332 return(ENXIO); 1333 } 1334 break; 1335 case FD_1440: 1336 if ( type != FD_1720 1337 && type != FD_1480 1338 && type != FD_1200 1339 && type != FD_820 1340 && type != FD_800 1341 && type != FD_720 1342 && type != FD_640 1343 ) 1344 return(ENXIO); 1345 break; 1346 } 1347 } 1348 } 1349 fd->ft = fd_types + type - 1; 1350 fd->flags |= FD_OPEN; 1351 /* 1352 * Clearing the DMA overrun counter at open time is a bit messy. 1353 * Since we're only managing one counter per controller, opening 1354 * the second drive could mess it up. Anyway, if the DMA overrun 1355 * condition is really persistent, it will eventually time out 1356 * still. OTOH, clearing it here will ensure we'll at least start 1357 * trying again after a previous (maybe even long ago) failure. 1358 * Also, this is merely a stop-gap measure only that should not 1359 * happen during normal operation, so we can tolerate it to be a 1360 * bit sloppy about this. 1361 */ 1362 fdc->dma_overruns = 0; 1363 1364 return 0; 1365 } 1366 1367 int 1368 fdclose(dev_t dev, int flags, int mode, struct thread *td) 1369 { 1370 fdu_t fdu = FDUNIT(minor(dev)); 1371 struct fd_data *fd; 1372 1373 fd = devclass_get_softc(fd_devclass, fdu); 1374 fd->flags &= ~FD_OPEN; 1375 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG); 1376 1377 return (0); 1378 } 1379 1380 /****************************************************************************/ 1381 /* fdstrategy */ 1382 /****************************************************************************/ 1383 void 1384 fdstrategy(struct buf *bp) 1385 { 1386 unsigned nblocks, blknum, cando; 1387 fdu_t fdu; 1388 fdc_p fdc; 1389 fd_p fd; 1390 size_t fdblk; 1391 1392 fdu = FDUNIT(minor(bp->b_dev)); 1393 fd = devclass_get_softc(fd_devclass, fdu); 1394 if (fd == 0) 1395 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1396 (u_long)major(bp->b_dev), (u_long)minor(bp->b_dev)); 1397 fdc = fd->fdc; 1398 if (fd->type == NO_TYPE) { 1399 bp->b_error = ENXIO; 1400 bp->b_flags |= B_ERROR; 1401 goto bad; 1402 }; 1403 1404 fdblk = 128 << (fd->ft->secsize); 1405 if (!(bp->b_flags & B_FORMAT)) { 1406 if (bp->b_blkno < 0) { 1407 printf( 1408 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n", 1409 fdu, (u_long)bp->b_blkno, bp->b_bcount); 1410 bp->b_error = EINVAL; 1411 bp->b_flags |= B_ERROR; 1412 goto bad; 1413 } 1414 if ((bp->b_bcount % fdblk) != 0) { 1415 bp->b_error = EINVAL; 1416 bp->b_flags |= B_ERROR; 1417 goto bad; 1418 } 1419 } 1420 1421 /* 1422 * Set up block calculations. 1423 */ 1424 if (bp->b_blkno > 20000000) { 1425 /* 1426 * Reject unreasonably high block number, prevent the 1427 * multiplication below from overflowing. 1428 */ 1429 bp->b_error = EINVAL; 1430 bp->b_flags |= B_ERROR; 1431 goto bad; 1432 } 1433 blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk; 1434 nblocks = fd->ft->size; 1435 bp->b_resid = 0; 1436 if (blknum + (bp->b_bcount / fdblk) > nblocks) { 1437 if (blknum <= nblocks) { 1438 cando = (nblocks - blknum) * fdblk; 1439 bp->b_resid = bp->b_bcount - cando; 1440 if (cando == 0) 1441 goto bad; /* not actually bad but EOF */ 1442 } else { 1443 bp->b_error = EINVAL; 1444 bp->b_flags |= B_ERROR; 1445 goto bad; 1446 } 1447 } 1448 bp->b_pblkno = bp->b_blkno; 1449 crit_enter(); 1450 bufqdisksort(&fdc->head, bp); 1451 callout_stop(&fd->toffhandle); 1452 1453 /* Tell devstat we are starting on the transaction */ 1454 devstat_start_transaction(&fd->device_stats); 1455 device_busy(fd->dev); 1456 1457 fdstart(fdc); 1458 crit_exit(); 1459 return; 1460 1461 bad: 1462 biodone(bp); 1463 } 1464 1465 /***************************************************************\ 1466 * fdstart * 1467 * We have just queued something.. if the controller is not busy * 1468 * then simulate the case where it has just finished a command * 1469 * So that it (the interrupt routine) looks on the queue for more* 1470 * work to do and picks up what we just added. * 1471 * If the controller is already busy, we need do nothing, as it * 1472 * will pick up our work when the present work completes * 1473 \***************************************************************/ 1474 static void 1475 fdstart(struct fdc_data *fdc) 1476 { 1477 crit_enter(); 1478 if(fdc->state == DEVIDLE) 1479 { 1480 fdc_intr(fdc); 1481 } 1482 crit_exit(); 1483 } 1484 1485 static void 1486 fd_iotimeout(void *xfdc) 1487 { 1488 fdc_p fdc; 1489 1490 fdc = xfdc; 1491 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1492 1493 /* 1494 * Due to IBM's brain-dead design, the FDC has a faked ready 1495 * signal, hardwired to ready == true. Thus, any command 1496 * issued if there's no diskette in the drive will _never_ 1497 * complete, and must be aborted by resetting the FDC. 1498 * Many thanks, Big Blue! 1499 * The FDC must not be reset directly, since that would 1500 * interfere with the state machine. Instead, pretend that 1501 * the command completed but was invalid. The state machine 1502 * will reset the FDC and retry once. 1503 */ 1504 crit_enter(); 1505 fdc->status[0] = NE7_ST0_IC_IV; 1506 fdc->flags &= ~FDC_STAT_VALID; 1507 fdc->state = IOTIMEDOUT; 1508 fdc_intr(fdc); 1509 crit_exit(); 1510 } 1511 1512 /* just ensure it is running in a critical section */ 1513 static void 1514 fd_pseudointr(void *xfdc) 1515 { 1516 crit_enter(); 1517 fdc_intr(xfdc); 1518 crit_exit(); 1519 } 1520 1521 /***********************************************************************\ 1522 * fdintr * 1523 * keep calling the state machine until it returns a 0 * 1524 * ALWAYS called at SPLBIO * 1525 \***********************************************************************/ 1526 static void 1527 fdc_intr(void *xfdc) 1528 { 1529 fdc_p fdc = xfdc; 1530 while(fdstate(fdc)) 1531 ; 1532 } 1533 1534 /* 1535 * magic pseudo-DMA initialization for YE FDC. Sets count and 1536 * direction 1537 */ 1538 #define SET_BCDR(fdc,wr,cnt,port) \ 1539 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1540 ((cnt)-1) & 0xff); \ 1541 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1542 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1543 1544 /* 1545 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy 1546 */ 1547 static int fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count) 1548 { 1549 u_char *cptr = (u_char *)addr; 1550 1551 if (flags & B_READ) { 1552 if (fdc->state != PIOREAD) { 1553 fdc->state = PIOREAD; 1554 return(0); 1555 }; 1556 SET_BCDR(fdc, 0, count, 0); 1557 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1558 FDC_YE_DATAPORT, cptr, count); 1559 } else { 1560 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1561 FDC_YE_DATAPORT, cptr, count); 1562 SET_BCDR(fdc, 0, count, 0); 1563 }; 1564 return(1); 1565 } 1566 1567 /***********************************************************************\ 1568 * The controller state machine. * 1569 * if it returns a non zero value, it should be called again immediatly * 1570 \***********************************************************************/ 1571 static int 1572 fdstate(fdc_p fdc) 1573 { 1574 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3; 1575 unsigned blknum = 0, b_cylinder = 0; 1576 fdu_t fdu = fdc->fdu; 1577 fd_p fd; 1578 struct buf *bp; 1579 struct fd_formb *finfo = NULL; 1580 size_t fdblk; 1581 1582 bp = fdc->bp; 1583 if (bp == NULL) { 1584 bp = bufq_first(&fdc->head); 1585 if (bp != NULL) { 1586 bufq_remove(&fdc->head, bp); 1587 fdc->bp = bp; 1588 } 1589 } 1590 if (bp == NULL) { 1591 /***********************************************\ 1592 * nothing left for this controller to do * 1593 * Force into the IDLE state, * 1594 \***********************************************/ 1595 fdc->state = DEVIDLE; 1596 if (fdc->fd) { 1597 device_printf(fdc->fdc_dev, 1598 "unexpected valid fd pointer\n"); 1599 fdc->fd = (fd_p) 0; 1600 fdc->fdu = -1; 1601 } 1602 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1603 return (0); 1604 } 1605 fdu = FDUNIT(minor(bp->b_dev)); 1606 fd = devclass_get_softc(fd_devclass, fdu); 1607 fdblk = 128 << fd->ft->secsize; 1608 if (fdc->fd && (fd != fdc->fd)) 1609 device_printf(fd->dev, "confused fd pointers\n"); 1610 read = bp->b_flags & B_READ; 1611 format = bp->b_flags & B_FORMAT; 1612 if (format) { 1613 finfo = (struct fd_formb *)bp->b_data; 1614 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 1615 - (char *)finfo; 1616 } 1617 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) { 1618 blknum = (unsigned) bp->b_pblkno * DEV_BSIZE/fdblk + 1619 fd->skip/fdblk; 1620 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 1621 } 1622 TRACE1("fd%d", fdu); 1623 TRACE1("[%s]", fdstates[fdc->state]); 1624 TRACE1("(0x%x)", fd->flags); 1625 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd); 1626 switch (fdc->state) 1627 { 1628 case DEVIDLE: 1629 case FINDWORK: /* we have found new work */ 1630 fdc->retry = 0; 1631 fd->skip = 0; 1632 fdc->fd = fd; 1633 fdc->fdu = fdu; 1634 fdc->fdctl_wr(fdc, fd->ft->trans); 1635 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 1636 /*******************************************************\ 1637 * If the next drive has a motor startup pending, then * 1638 * it will start up in its own good time * 1639 \*******************************************************/ 1640 if(fd->flags & FD_MOTOR_WAIT) { 1641 fdc->state = MOTORWAIT; 1642 return (0); /* come back later */ 1643 } 1644 /*******************************************************\ 1645 * Maybe if it's not starting, it SHOULD be starting * 1646 \*******************************************************/ 1647 if (!(fd->flags & FD_MOTOR)) 1648 { 1649 fdc->state = MOTORWAIT; 1650 fd_turnon(fd); 1651 return (0); 1652 } 1653 else /* at least make sure we are selected */ 1654 { 1655 set_motor(fdc, fd->fdsu, TURNON); 1656 } 1657 if (fdc->flags & FDC_NEEDS_RESET) { 1658 fdc->state = RESETCTLR; 1659 fdc->flags &= ~FDC_NEEDS_RESET; 1660 } else 1661 fdc->state = DOSEEK; 1662 break; 1663 case DOSEEK: 1664 if (b_cylinder == (unsigned)fd->track) 1665 { 1666 fdc->state = SEEKCOMPLETE; 1667 break; 1668 } 1669 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 1670 fd->fdsu, b_cylinder * fd->ft->steptrac, 1671 0)) 1672 { 1673 /* 1674 * seek command not accepted, looks like 1675 * the FDC went off to the Saints... 1676 */ 1677 fdc->retry = 6; /* try a reset */ 1678 return(retrier(fdc)); 1679 } 1680 fd->track = FD_NO_TRACK; 1681 fdc->state = SEEKWAIT; 1682 return(0); /* will return later */ 1683 case SEEKWAIT: 1684 /* allow heads to settle */ 1685 callout_reset(&fdc->pseudointr_ch, hz / 16, 1686 fd_pseudointr, fdc); 1687 fdc->state = SEEKCOMPLETE; 1688 return(0); /* will return later */ 1689 case SEEKCOMPLETE : /* SEEK DONE, START DMA */ 1690 /* Make sure seek really happened*/ 1691 if(fd->track == FD_NO_TRACK) { 1692 int descyl = b_cylinder * fd->ft->steptrac; 1693 do { 1694 /* 1695 * This might be a "ready changed" interrupt, 1696 * which cannot really happen since the 1697 * RDY pin is hardwired to + 5 volts. This 1698 * generally indicates a "bouncing" intr 1699 * line, so do one of the following: 1700 * 1701 * When running on an enhanced FDC that is 1702 * known to not go stuck after responding 1703 * with INVALID, fetch all interrupt states 1704 * until seeing either an INVALID or a 1705 * real interrupt condition. 1706 * 1707 * When running on a dumb old NE765, give 1708 * up immediately. The controller will 1709 * provide up to four dummy RC interrupt 1710 * conditions right after reset (for the 1711 * corresponding four drives), so this is 1712 * our only chance to get notice that it 1713 * was not the FDC that caused the interrupt. 1714 */ 1715 if (fd_sense_int(fdc, &st0, &cyl) 1716 == FD_NOT_VALID) 1717 return 0; 1718 if(fdc->fdct == FDC_NE765 1719 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1720 return 0; /* hope for a real intr */ 1721 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1722 1723 if (0 == descyl) { 1724 int failed = 0; 1725 /* 1726 * seek to cyl 0 requested; make sure we are 1727 * really there 1728 */ 1729 if (fd_sense_drive_status(fdc, &st3)) 1730 failed = 1; 1731 if ((st3 & NE7_ST3_T0) == 0) { 1732 printf( 1733 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 1734 fdu, st3, NE7_ST3BITS); 1735 failed = 1; 1736 } 1737 1738 if (failed) { 1739 if(fdc->retry < 3) 1740 fdc->retry = 3; 1741 return (retrier(fdc)); 1742 } 1743 } 1744 1745 if (cyl != descyl) { 1746 printf( 1747 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 1748 fdu, descyl, cyl, st0); 1749 if (fdc->retry < 3) 1750 fdc->retry = 3; 1751 return (retrier(fdc)); 1752 } 1753 } 1754 1755 fd->track = b_cylinder; 1756 if (!(fdc->flags & FDC_NODMA)) 1757 isa_dmastart(bp->b_flags, bp->b_data+fd->skip, 1758 format ? bp->b_bcount : fdblk, fdc->dmachan); 1759 sectrac = fd->ft->sectrac; 1760 sec = blknum % (sectrac * fd->ft->heads); 1761 head = sec / sectrac; 1762 sec = sec % sectrac + 1; 1763 fd->hddrv = ((head&1)<<2)+fdu; 1764 1765 if(format || !read) 1766 { 1767 /* make sure the drive is writable */ 1768 if(fd_sense_drive_status(fdc, &st3) != 0) 1769 { 1770 /* stuck controller? */ 1771 if (!(fdc->flags & FDC_NODMA)) 1772 isa_dmadone(bp->b_flags, 1773 bp->b_data + fd->skip, 1774 format ? bp->b_bcount : fdblk, 1775 fdc->dmachan); 1776 fdc->retry = 6; /* reset the beast */ 1777 return (retrier(fdc)); 1778 } 1779 if(st3 & NE7_ST3_WP) 1780 { 1781 /* 1782 * XXX YES! this is ugly. 1783 * in order to force the current operation 1784 * to fail, we will have to fake an FDC 1785 * error - all error handling is done 1786 * by the retrier() 1787 */ 1788 fdc->status[0] = NE7_ST0_IC_AT; 1789 fdc->status[1] = NE7_ST1_NW; 1790 fdc->status[2] = 0; 1791 fdc->status[3] = fd->track; 1792 fdc->status[4] = head; 1793 fdc->status[5] = sec; 1794 fdc->retry = 8; /* break out immediately */ 1795 fdc->state = IOTIMEDOUT; /* not really... */ 1796 return (1); 1797 } 1798 } 1799 1800 if (format) { 1801 if (fdc->flags & FDC_NODMA) { 1802 /* 1803 * This seems to be necessary for 1804 * whatever obscure reason; if we omit 1805 * it, we end up filling the sector ID 1806 * fields of the newly formatted track 1807 * entirely with garbage, causing 1808 * `wrong cylinder' errors all over 1809 * the place when trying to read them 1810 * back. 1811 * 1812 * Umpf. 1813 */ 1814 SET_BCDR(fdc, 1, bp->b_bcount, 0); 1815 1816 (void)fdcpio(fdc,bp->b_flags, 1817 bp->b_data+fd->skip, 1818 bp->b_bcount); 1819 1820 } 1821 /* formatting */ 1822 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu, 1823 finfo->fd_formb_secshift, 1824 finfo->fd_formb_nsecs, 1825 finfo->fd_formb_gaplen, 1826 finfo->fd_formb_fillbyte, 0)) { 1827 /* controller fell over */ 1828 if (!(fdc->flags & FDC_NODMA)) 1829 isa_dmadone(bp->b_flags, 1830 bp->b_data + fd->skip, 1831 format ? bp->b_bcount : fdblk, 1832 fdc->dmachan); 1833 fdc->retry = 6; 1834 return (retrier(fdc)); 1835 } 1836 } else { 1837 if (fdc->flags & FDC_NODMA) { 1838 /* 1839 * this seems to be necessary even when 1840 * reading data 1841 */ 1842 SET_BCDR(fdc, 1, fdblk, 0); 1843 1844 /* 1845 * perform the write pseudo-DMA before 1846 * the WRITE command is sent 1847 */ 1848 if (!read) 1849 (void)fdcpio(fdc,bp->b_flags, 1850 bp->b_data+fd->skip, 1851 fdblk); 1852 } 1853 if (fd_cmd(fdc, 9, 1854 (read ? NE7CMD_READ : NE7CMD_WRITE), 1855 head << 2 | fdu, /* head & unit */ 1856 fd->track, /* track */ 1857 head, 1858 sec, /* sector + 1 */ 1859 fd->ft->secsize, /* sector size */ 1860 sectrac, /* sectors/track */ 1861 fd->ft->gap, /* gap size */ 1862 fd->ft->datalen, /* data length */ 1863 0)) { 1864 /* the beast is sleeping again */ 1865 if (!(fdc->flags & FDC_NODMA)) 1866 isa_dmadone(bp->b_flags, 1867 bp->b_data + fd->skip, 1868 format ? bp->b_bcount : fdblk, 1869 fdc->dmachan); 1870 fdc->retry = 6; 1871 return (retrier(fdc)); 1872 } 1873 } 1874 if (fdc->flags & FDC_NODMA) 1875 /* 1876 * if this is a read, then simply await interrupt 1877 * before performing PIO 1878 */ 1879 if (read && !fdcpio(fdc,bp->b_flags, 1880 bp->b_data+fd->skip,fdblk)) { 1881 callout_reset(&fd->tohandle, hz, 1882 fd_iotimeout, fdc); 1883 return(0); /* will return later */ 1884 }; 1885 1886 /* 1887 * write (or format) operation will fall through and 1888 * await completion interrupt 1889 */ 1890 fdc->state = IOCOMPLETE; 1891 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc); 1892 return (0); /* will return later */ 1893 case PIOREAD: 1894 /* 1895 * actually perform the PIO read. The IOCOMPLETE case 1896 * removes the timeout for us. 1897 */ 1898 (void)fdcpio(fdc,bp->b_flags,bp->b_data+fd->skip,fdblk); 1899 fdc->state = IOCOMPLETE; 1900 /* FALLTHROUGH */ 1901 case IOCOMPLETE: /* IO DONE, post-analyze */ 1902 callout_stop(&fd->tohandle); 1903 1904 if (fd_read_status(fdc, fd->fdsu)) { 1905 if (!(fdc->flags & FDC_NODMA)) 1906 isa_dmadone(bp->b_flags, bp->b_data + fd->skip, 1907 format ? bp->b_bcount : fdblk, 1908 fdc->dmachan); 1909 if (fdc->retry < 6) 1910 fdc->retry = 6; /* force a reset */ 1911 return (retrier(fdc)); 1912 } 1913 1914 fdc->state = IOTIMEDOUT; 1915 1916 /* FALLTHROUGH */ 1917 1918 case IOTIMEDOUT: 1919 if (!(fdc->flags & FDC_NODMA)) 1920 isa_dmadone(bp->b_flags, bp->b_data + fd->skip, 1921 format ? bp->b_bcount : fdblk, fdc->dmachan); 1922 if (fdc->status[0] & NE7_ST0_IC) { 1923 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1924 && fdc->status[1] & NE7_ST1_OR) { 1925 /* 1926 * DMA overrun. Someone hogged the bus and 1927 * didn't release it in time for the next 1928 * FDC transfer. 1929 * 1930 * We normally restart this without bumping 1931 * the retry counter. However, in case 1932 * something is seriously messed up (like 1933 * broken hardware), we rather limit the 1934 * number of retries so the IO operation 1935 * doesn't block indefinately. 1936 */ 1937 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 1938 fdc->state = SEEKCOMPLETE; 1939 return (1); 1940 } /* else fall through */ 1941 } 1942 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 1943 && fdc->retry < 6) 1944 fdc->retry = 6; /* force a reset */ 1945 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1946 && fdc->status[2] & NE7_ST2_WC 1947 && fdc->retry < 3) 1948 fdc->retry = 3; /* force recalibrate */ 1949 return (retrier(fdc)); 1950 } 1951 /* All OK */ 1952 /* Operation successful, retry DMA overruns again next time. */ 1953 fdc->dma_overruns = 0; 1954 fd->skip += fdblk; 1955 if (!format && fd->skip < bp->b_bcount - bp->b_resid) { 1956 /* set up next transfer */ 1957 fdc->state = DOSEEK; 1958 } else { 1959 /* ALL DONE */ 1960 fd->skip = 0; 1961 fdc->bp = NULL; 1962 device_unbusy(fd->dev); 1963 devstat_end_transaction_buf(&fd->device_stats, bp); 1964 biodone(bp); 1965 fdc->fd = (fd_p) 0; 1966 fdc->fdu = -1; 1967 fdc->state = FINDWORK; 1968 } 1969 return (1); 1970 case RESETCTLR: 1971 fdc_reset(fdc); 1972 fdc->retry++; 1973 fdc->state = RESETCOMPLETE; 1974 return (0); 1975 case RESETCOMPLETE: 1976 /* 1977 * Discard all the results from the reset so that they 1978 * can't cause an unexpected interrupt later. 1979 */ 1980 for (i = 0; i < 4; i++) 1981 (void)fd_sense_int(fdc, &st0, &cyl); 1982 fdc->state = STARTRECAL; 1983 /* Fall through. */ 1984 case STARTRECAL: 1985 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 1986 /* arrgl */ 1987 fdc->retry = 6; 1988 return (retrier(fdc)); 1989 } 1990 fdc->state = RECALWAIT; 1991 return (0); /* will return later */ 1992 case RECALWAIT: 1993 /* allow heads to settle */ 1994 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc); 1995 fdc->state = RECALCOMPLETE; 1996 return (0); /* will return later */ 1997 case RECALCOMPLETE: 1998 do { 1999 /* 2000 * See SEEKCOMPLETE for a comment on this: 2001 */ 2002 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2003 return 0; 2004 if(fdc->fdct == FDC_NE765 2005 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2006 return 0; /* hope for a real intr */ 2007 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2008 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2009 { 2010 if(fdc->retry > 3) 2011 /* 2012 * a recalibrate from beyond cylinder 77 2013 * will "fail" due to the FDC limitations; 2014 * since people used to complain much about 2015 * the failure message, try not logging 2016 * this one if it seems to be the first 2017 * time in a line 2018 */ 2019 printf("fd%d: recal failed ST0 %b cyl %d\n", 2020 fdu, st0, NE7_ST0BITS, cyl); 2021 if(fdc->retry < 3) fdc->retry = 3; 2022 return (retrier(fdc)); 2023 } 2024 fd->track = 0; 2025 /* Seek (probably) necessary */ 2026 fdc->state = DOSEEK; 2027 return (1); /* will return immediatly */ 2028 case MOTORWAIT: 2029 if(fd->flags & FD_MOTOR_WAIT) 2030 { 2031 return (0); /* time's not up yet */ 2032 } 2033 if (fdc->flags & FDC_NEEDS_RESET) { 2034 fdc->state = RESETCTLR; 2035 fdc->flags &= ~FDC_NEEDS_RESET; 2036 } else { 2037 /* 2038 * If all motors were off, then the controller was 2039 * reset, so it has lost track of the current 2040 * cylinder. Recalibrate to handle this case. 2041 * But first, discard the results of the reset. 2042 */ 2043 fdc->state = RESETCOMPLETE; 2044 } 2045 return (1); /* will return immediatly */ 2046 default: 2047 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2048 if (fd_read_status(fdc, fd->fdsu) == 0) 2049 printf("FDC status :%x %x %x %x %x %x %x ", 2050 fdc->status[0], 2051 fdc->status[1], 2052 fdc->status[2], 2053 fdc->status[3], 2054 fdc->status[4], 2055 fdc->status[5], 2056 fdc->status[6] ); 2057 else 2058 printf("No status available "); 2059 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2060 { 2061 printf("[controller is dead now]\n"); 2062 return (0); 2063 } 2064 printf("ST0 = %x, PCN = %x\n", st0, cyl); 2065 return (0); 2066 } 2067 /*XXX confusing: some branches return immediately, others end up here*/ 2068 return (1); /* Come back immediatly to new state */ 2069 } 2070 2071 static int 2072 retrier(struct fdc_data *fdc) 2073 { 2074 struct buf *bp; 2075 struct fd_data *fd; 2076 int fdu; 2077 2078 bp = fdc->bp; 2079 2080 /* XXX shouldn't this be cached somewhere? */ 2081 fdu = FDUNIT(minor(bp->b_dev)); 2082 fd = devclass_get_softc(fd_devclass, fdu); 2083 if (fd->options & FDOPT_NORETRY) 2084 goto fail; 2085 2086 switch (fdc->retry) { 2087 case 0: case 1: case 2: 2088 fdc->state = SEEKCOMPLETE; 2089 break; 2090 case 3: case 4: case 5: 2091 fdc->state = STARTRECAL; 2092 break; 2093 case 6: 2094 fdc->state = RESETCTLR; 2095 break; 2096 case 7: 2097 break; 2098 default: 2099 fail: 2100 { 2101 int printerror = (fd->options & FDOPT_NOERRLOG) == 0; 2102 2103 if (printerror) { 2104 /* 2105 * note: use the correct device for more 2106 * verbose error reporting. 2107 */ 2108 dev_t subdev; 2109 2110 subdev = make_sub_dev(bp->b_dev, 2111 (FDUNIT(minor(bp->b_dev))<<3)|RAW_PART); 2112 diskerr(bp, subdev, 2113 "hard error", LOG_PRINTF, 2114 fdc->fd->skip / DEV_BSIZE, 2115 (struct disklabel *)NULL); 2116 } 2117 if (printerror) { 2118 if (fdc->flags & FDC_STAT_VALID) 2119 printf( 2120 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2121 fdc->status[0], NE7_ST0BITS, 2122 fdc->status[1], NE7_ST1BITS, 2123 fdc->status[2], NE7_ST2BITS, 2124 fdc->status[3], fdc->status[4], 2125 fdc->status[5]); 2126 else 2127 printf(" (No status)\n"); 2128 } 2129 } 2130 bp->b_flags |= B_ERROR; 2131 bp->b_error = EIO; 2132 bp->b_resid += bp->b_bcount - fdc->fd->skip; 2133 fdc->bp = NULL; 2134 fdc->fd->skip = 0; 2135 device_unbusy(fd->dev); 2136 devstat_end_transaction_buf(&fdc->fd->device_stats, bp); 2137 biodone(bp); 2138 fdc->state = FINDWORK; 2139 fdc->flags |= FDC_NEEDS_RESET; 2140 fdc->fd = (fd_p) 0; 2141 fdc->fdu = -1; 2142 return (1); 2143 } 2144 fdc->retry++; 2145 return (1); 2146 } 2147 2148 static int 2149 fdformat(dev_t dev, struct fd_formb *finfo, struct thread *td) 2150 { 2151 fdu_t fdu; 2152 fd_p fd; 2153 2154 struct buf *bp; 2155 int rv = 0; 2156 size_t fdblk; 2157 2158 fdu = FDUNIT(minor(dev)); 2159 fd = devclass_get_softc(fd_devclass, fdu); 2160 fdblk = 128 << fd->ft->secsize; 2161 2162 /* set up a buffer header for fdstrategy() */ 2163 bp = malloc(sizeof(struct buf), M_TEMP, M_WAITOK | M_ZERO); 2164 2165 /* 2166 * keep the process from being swapped 2167 */ 2168 BUF_LOCKINIT(bp); 2169 BUF_LOCK(bp, LK_EXCLUSIVE); 2170 bp->b_flags = B_PHYS | B_FORMAT; 2171 2172 /* 2173 * calculate a fake blkno, so fdstrategy() would initiate a 2174 * seek to the requested cylinder 2175 */ 2176 bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads) 2177 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE; 2178 2179 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; 2180 bp->b_data = (caddr_t)finfo; 2181 2182 /* now do the format */ 2183 bp->b_dev = dev; 2184 BUF_STRATEGY(bp, 0); 2185 2186 /* ...and wait for it to complete */ 2187 crit_enter(); 2188 while(!(bp->b_flags & B_DONE)) { 2189 rv = tsleep((caddr_t)bp, 0, "fdform", 20 * hz); 2190 if (rv == EWOULDBLOCK) 2191 break; 2192 } 2193 crit_exit(); 2194 2195 if (rv == EWOULDBLOCK) { 2196 /* timed out */ 2197 rv = EIO; 2198 device_unbusy(fd->dev); 2199 biodone(bp); 2200 } 2201 if (bp->b_flags & B_ERROR) 2202 rv = bp->b_error; 2203 /* 2204 * allow the process to be swapped 2205 */ 2206 BUF_UNLOCK(bp); 2207 BUF_LOCKFREE(bp); 2208 free(bp, M_TEMP); 2209 return rv; 2210 } 2211 2212 /* 2213 * TODO: don't allocate buffer on stack. 2214 */ 2215 2216 static int 2217 fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 2218 { 2219 fdu_t fdu = FDUNIT(minor(dev)); 2220 fd_p fd = devclass_get_softc(fd_devclass, fdu); 2221 size_t fdblk; 2222 2223 struct fd_type *fdt; 2224 struct disklabel *dl; 2225 struct fdc_status *fsp; 2226 char buffer[DEV_BSIZE]; 2227 int error = 0; 2228 2229 fdblk = 128 << fd->ft->secsize; 2230 2231 switch (cmd) { 2232 case DIOCGDINFO: 2233 bzero(buffer, sizeof (buffer)); 2234 dl = (struct disklabel *)buffer; 2235 dl->d_secsize = fdblk; 2236 fdt = fd->ft; 2237 dl->d_secpercyl = fdt->size / fdt->tracks; 2238 dl->d_type = DTYPE_FLOPPY; 2239 2240 if (readdisklabel(dev, dl) 2241 == NULL) 2242 error = 0; 2243 else 2244 error = EINVAL; 2245 2246 *(struct disklabel *)addr = *dl; 2247 break; 2248 2249 case DIOCSDINFO: 2250 if ((flag & FWRITE) == 0) 2251 error = EBADF; 2252 break; 2253 2254 case DIOCWLABEL: 2255 if ((flag & FWRITE) == 0) 2256 error = EBADF; 2257 break; 2258 2259 case DIOCWDINFO: 2260 if ((flag & FWRITE) == 0) { 2261 error = EBADF; 2262 break; 2263 } 2264 2265 dl = (struct disklabel *)addr; 2266 2267 if ((error = setdisklabel((struct disklabel *)buffer, dl, 2268 (u_long)0)) != 0) 2269 break; 2270 2271 error = writedisklabel(dev, (struct disklabel *)buffer); 2272 break; 2273 case FD_FORM: 2274 if ((flag & FWRITE) == 0) 2275 error = EBADF; /* must be opened for writing */ 2276 else if (((struct fd_formb *)addr)->format_version != 2277 FD_FORMAT_VERSION) 2278 error = EINVAL; /* wrong version of formatting prog */ 2279 else 2280 error = fdformat(dev, (struct fd_formb *)addr, td); 2281 break; 2282 2283 case FD_GTYPE: /* get drive type */ 2284 *(struct fd_type *)addr = *fd->ft; 2285 break; 2286 2287 case FD_STYPE: /* set drive type */ 2288 /* this is considered harmful; only allow for superuser */ 2289 if (suser(td) != 0) 2290 return EPERM; 2291 *fd->ft = *(struct fd_type *)addr; 2292 break; 2293 2294 case FD_GOPTS: /* get drive options */ 2295 *(int *)addr = fd->options; 2296 break; 2297 2298 case FD_SOPTS: /* set drive options */ 2299 fd->options = *(int *)addr; 2300 break; 2301 2302 case FD_GSTAT: 2303 fsp = (struct fdc_status *)addr; 2304 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2305 return EINVAL; 2306 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2307 break; 2308 2309 default: 2310 error = ENOTTY; 2311 break; 2312 } 2313 return (error); 2314 } 2315 2316 /* 2317 * Hello emacs, these are the 2318 * Local Variables: 2319 * c-indent-level: 8 2320 * c-continued-statement-offset: 8 2321 * c-continued-brace-offset: 0 2322 * c-brace-offset: -8 2323 * c-brace-imaginary-offset: 0 2324 * c-argdecl-indent: 8 2325 * c-label-offset: -8 2326 * c++-hanging-braces: 1 2327 * c++-access-specifier-offset: -8 2328 * c++-empty-arglist-indent: 8 2329 * c++-friend-offset: 0 2330 * End: 2331 */ 2332