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 1.20 2004/11/12 09:50:38 joerg 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 83 #include <machine/clock.h> 84 #include <machine/ioctl_fd.h> 85 #include <machine/resource.h> 86 #include <machine/stdarg.h> 87 88 #include <bus/isa/isavar.h> 89 #include <bus/isa/isareg.h> 90 #include "fdreg.h" 91 #include "fdc.h" 92 #include <bus/isa/rtc.h> 93 94 /* misuse a flag to identify format operation */ 95 #define B_FORMAT B_XXX 96 97 /* configuration flags */ 98 #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */ 99 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ 100 101 /* internally used only, not really from CMOS: */ 102 #define RTCFDT_144M_PRETENDED 0x1000 103 104 /* error returns for fd_cmd() */ 105 #define FD_FAILED -1 106 #define FD_NOT_VALID -2 107 #define FDC_ERRMAX 100 /* do not log more */ 108 /* 109 * Stop retrying after this many DMA overruns. Since each retry takes 110 * one revolution, with 300 rpm., 25 retries take approximately 10 111 * seconds which the read attempt will block in case the DMA overrun 112 * is persistent. 113 */ 114 #define FDC_DMAOV_MAX 25 115 116 /* 117 * Timeout value for the PIO loops to wait until the FDC main status 118 * register matches our expectations (request for master, direction 119 * bit). This is supposed to be a number of microseconds, although 120 * timing might actually not be very accurate. 121 * 122 * Timeouts of 100 msec are believed to be required for some broken 123 * (old) hardware. 124 */ 125 #define FDSTS_TIMEOUT 100000 126 127 #define NUMTYPES 17 128 #define NUMDENS (NUMTYPES - 7) 129 130 /* These defines (-1) must match index for fd_types */ 131 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */ 132 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */ 133 #define FD_1720 1 134 #define FD_1480 2 135 #define FD_1440 3 136 #define FD_1200 4 137 #define FD_820 5 138 #define FD_800 6 139 #define FD_720 7 140 #define FD_360 8 141 #define FD_640 9 142 #define FD_1232 10 143 144 #define FD_1480in5_25 11 145 #define FD_1440in5_25 12 146 #define FD_820in5_25 13 147 #define FD_800in5_25 14 148 #define FD_720in5_25 15 149 #define FD_360in5_25 16 150 #define FD_640in5_25 17 151 152 153 static struct fd_type fd_types[NUMTYPES] = 154 { 155 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */ 156 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */ 157 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */ 158 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */ 159 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */ 160 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */ 161 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */ 162 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */ 163 { 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */ 164 { 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */ 165 166 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */ 167 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */ 168 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */ 169 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */ 170 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */ 171 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */ 172 { 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */ 173 }; 174 175 #define DRVS_PER_CTLR 2 /* 2 floppies */ 176 177 /***********************************************************************\ 178 * Per controller structure. * 179 \***********************************************************************/ 180 devclass_t fdc_devclass; 181 182 /***********************************************************************\ 183 * Per drive structure. * 184 * N per controller (DRVS_PER_CTLR) * 185 \***********************************************************************/ 186 struct fd_data { 187 struct fdc_data *fdc; /* pointer to controller structure */ 188 int fdsu; /* this units number on this controller */ 189 int type; /* Drive type (FD_1440...) */ 190 struct fd_type *ft; /* pointer to the type descriptor */ 191 int flags; 192 #define FD_OPEN 0x01 /* it's open */ 193 #define FD_ACTIVE 0x02 /* it's active */ 194 #define FD_MOTOR 0x04 /* motor should be on */ 195 #define FD_MOTOR_WAIT 0x08 /* motor coming up */ 196 int skip; 197 int hddrv; 198 #define FD_NO_TRACK -2 199 int track; /* where we think the head is */ 200 int options; /* user configurable options, see ioctl_fd.h */ 201 struct callout toffhandle; 202 struct callout tohandle; 203 struct callout motor; 204 struct devstat device_stats; 205 device_t dev; 206 fdu_t fdu; 207 }; 208 209 struct fdc_ivars { 210 int fdunit; 211 }; 212 static devclass_t fd_devclass; 213 214 /***********************************************************************\ 215 * Throughout this file the following conventions will be used: * 216 * fd is a pointer to the fd_data struct for the drive in question * 217 * fdc is a pointer to the fdc_data struct for the controller * 218 * fdu is the floppy drive unit number * 219 * fdcu is the floppy controller unit number * 220 * fdsu is the floppy drive unit number on that controller. (sub-unit) * 221 \***********************************************************************/ 222 223 /* internal functions */ 224 static void fdc_intr(void *); 225 static void set_motor(struct fdc_data *, int, int); 226 # define TURNON 1 227 # define TURNOFF 0 228 static timeout_t fd_turnoff; 229 static timeout_t fd_motor_on; 230 static void fd_turnon(struct fd_data *); 231 static void fdc_reset(fdc_p); 232 static int fd_in(struct fdc_data *, int *); 233 static int out_fdc(struct fdc_data *, int); 234 static void fdstart(struct fdc_data *); 235 static timeout_t fd_iotimeout; 236 static timeout_t fd_pseudointr; 237 static int fdstate(struct fdc_data *); 238 static int retrier(struct fdc_data *); 239 static int fdformat(dev_t, struct fd_formb *, struct thread *); 240 241 static int enable_fifo(fdc_p fdc); 242 243 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 244 245 246 #define DEVIDLE 0 247 #define FINDWORK 1 248 #define DOSEEK 2 249 #define SEEKCOMPLETE 3 250 #define IOCOMPLETE 4 251 #define RECALCOMPLETE 5 252 #define STARTRECAL 6 253 #define RESETCTLR 7 254 #define SEEKWAIT 8 255 #define RECALWAIT 9 256 #define MOTORWAIT 10 257 #define IOTIMEDOUT 11 258 #define RESETCOMPLETE 12 259 #define PIOREAD 13 260 261 #ifdef FDC_DEBUG 262 static char const * const fdstates[] = 263 { 264 "DEVIDLE", 265 "FINDWORK", 266 "DOSEEK", 267 "SEEKCOMPLETE", 268 "IOCOMPLETE", 269 "RECALCOMPLETE", 270 "STARTRECAL", 271 "RESETCTLR", 272 "SEEKWAIT", 273 "RECALWAIT", 274 "MOTORWAIT", 275 "IOTIMEDOUT", 276 "RESETCOMPLETE", 277 "PIOREAD", 278 }; 279 280 /* CAUTION: fd_debug causes huge amounts of logging output */ 281 static int volatile fd_debug = 0; 282 #define TRACE0(arg) if(fd_debug) printf(arg) 283 #define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2) 284 #else /* FDC_DEBUG */ 285 #define TRACE0(arg) 286 #define TRACE1(arg1, arg2) 287 #endif /* FDC_DEBUG */ 288 289 void 290 fdout_wr(fdc_p fdc, u_int8_t v) 291 { 292 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 293 } 294 295 static u_int8_t 296 fdsts_rd(fdc_p fdc) 297 { 298 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 299 } 300 301 static void 302 fddata_wr(fdc_p fdc, u_int8_t v) 303 { 304 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 305 } 306 307 static u_int8_t 308 fddata_rd(fdc_p fdc) 309 { 310 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 311 } 312 313 static void 314 fdctl_wr_isa(fdc_p fdc, u_int8_t v) 315 { 316 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 317 } 318 319 #if 0 320 321 static u_int8_t 322 fdin_rd(fdc_p fdc) 323 { 324 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 325 } 326 327 #endif 328 329 static d_open_t Fdopen; /* NOTE, not fdopen */ 330 static d_close_t fdclose; 331 static d_ioctl_t fdioctl; 332 static d_strategy_t fdstrategy; 333 334 static struct cdevsw fd_cdevsw = { 335 /* name */ "fd", 336 /* maj */ FD_CDEV_MAJOR, 337 /* flags */ D_DISK, 338 /* port */ NULL, 339 /* clone */ NULL, 340 341 /* open */ Fdopen, 342 /* close */ fdclose, 343 /* read */ physread, 344 /* write */ physwrite, 345 /* ioctl */ fdioctl, 346 /* poll */ nopoll, 347 /* mmap */ nommap, 348 /* strategy */ fdstrategy, 349 /* dump */ nodump, 350 /* psize */ nopsize 351 }; 352 353 static int 354 fdc_err(struct fdc_data *fdc, const char *s) 355 { 356 fdc->fdc_errs++; 357 if (s) { 358 if (fdc->fdc_errs < FDC_ERRMAX) 359 device_printf(fdc->fdc_dev, "%s", s); 360 else if (fdc->fdc_errs == FDC_ERRMAX) 361 device_printf(fdc->fdc_dev, "too many errors, not " 362 "logging any more\n"); 363 } 364 365 return FD_FAILED; 366 } 367 368 /* 369 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 370 * Unit number, 371 * # of output bytes, output bytes as ints ..., 372 * # of input bytes, input bytes as ints ... 373 */ 374 int 375 fd_cmd(struct fdc_data *fdc, int n_out, ...) 376 { 377 u_char cmd; 378 int n_in; 379 int n; 380 __va_list ap; 381 382 __va_start(ap, n_out); 383 cmd = (u_char)(__va_arg(ap, int)); 384 __va_end(ap); 385 __va_start(ap, n_out); 386 for (n = 0; n < n_out; n++) 387 { 388 if (out_fdc(fdc, __va_arg(ap, int)) < 0) 389 { 390 char msg[50]; 391 snprintf(msg, sizeof(msg), 392 "cmd %x failed at out byte %d of %d\n", 393 cmd, n + 1, n_out); 394 return fdc_err(fdc, msg); 395 } 396 } 397 n_in = __va_arg(ap, int); 398 for (n = 0; n < n_in; n++) 399 { 400 int *ptr = __va_arg(ap, int *); 401 if (fd_in(fdc, ptr) < 0) 402 { 403 char msg[50]; 404 snprintf(msg, sizeof(msg), 405 "cmd %02x failed at in byte %d of %d\n", 406 cmd, n + 1, n_in); 407 return fdc_err(fdc, msg); 408 } 409 } 410 411 return 0; 412 } 413 414 static int 415 enable_fifo(fdc_p fdc) 416 { 417 int i, j; 418 419 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 420 421 /* 422 * XXX: 423 * Cannot use fd_cmd the normal way here, since 424 * this might be an invalid command. Thus we send the 425 * first byte, and check for an early turn of data directon. 426 */ 427 428 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 429 return fdc_err(fdc, "Enable FIFO failed\n"); 430 431 /* If command is invalid, return */ 432 j = FDSTS_TIMEOUT; 433 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 434 != NE7_RQM && j-- > 0) { 435 if (i == (NE7_DIO | NE7_RQM)) { 436 fdc_reset(fdc); 437 return FD_FAILED; 438 } 439 DELAY(1); 440 } 441 if (j<0 || 442 fd_cmd(fdc, 3, 443 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 444 fdc_reset(fdc); 445 return fdc_err(fdc, "Enable FIFO failed\n"); 446 } 447 fdc->flags |= FDC_HAS_FIFO; 448 return 0; 449 } 450 if (fd_cmd(fdc, 4, 451 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 452 return fdc_err(fdc, "Re-enable FIFO failed\n"); 453 return 0; 454 } 455 456 static int 457 fd_sense_drive_status(fdc_p fdc, int *st3p) 458 { 459 int st3; 460 461 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 462 { 463 return fdc_err(fdc, "Sense Drive Status failed\n"); 464 } 465 if (st3p) 466 *st3p = st3; 467 468 return 0; 469 } 470 471 static int 472 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 473 { 474 int cyl, st0, ret; 475 476 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 477 if (ret) { 478 (void)fdc_err(fdc, 479 "sense intr err reading stat reg 0\n"); 480 return ret; 481 } 482 483 if (st0p) 484 *st0p = st0; 485 486 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 487 /* 488 * There doesn't seem to have been an interrupt. 489 */ 490 return FD_NOT_VALID; 491 } 492 493 if (fd_in(fdc, &cyl) < 0) { 494 return fdc_err(fdc, "can't get cyl num\n"); 495 } 496 497 if (cylp) 498 *cylp = cyl; 499 500 return 0; 501 } 502 503 504 static int 505 fd_read_status(fdc_p fdc, int fdsu) 506 { 507 int i, ret; 508 509 for (i = 0; i < 7; i++) { 510 /* 511 * XXX types are poorly chosen. Only bytes can by read 512 * from the hardware, but fdc->status[] wants u_ints and 513 * fd_in() gives ints. 514 */ 515 int status; 516 517 ret = fd_in(fdc, &status); 518 fdc->status[i] = status; 519 if (ret != 0) 520 break; 521 } 522 523 if (ret == 0) 524 fdc->flags |= FDC_STAT_VALID; 525 else 526 fdc->flags &= ~FDC_STAT_VALID; 527 528 return ret; 529 } 530 531 /****************************************************************************/ 532 /* autoconfiguration stuff */ 533 /****************************************************************************/ 534 535 int 536 fdc_alloc_resources(struct fdc_data *fdc) 537 { 538 device_t dev; 539 int ispnp, ispcmcia; 540 541 dev = fdc->fdc_dev; 542 ispnp = (fdc->flags & FDC_ISPNP) != 0; 543 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 544 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 545 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 546 547 /* 548 * On standard ISA, we don't just use an 8 port range 549 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 550 * register at 0x3f6. 551 * 552 * Isn't PC hardware wonderful. 553 * 554 * The Y-E Data PCMCIA FDC doesn't have this problem, it 555 * uses the register with offset 6 for pseudo-DMA, and the 556 * one with offset 7 as control register. 557 */ 558 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 559 &fdc->rid_ioport, 0ul, ~0ul, 560 ispcmcia ? 8 : (ispnp ? 1 : 6), 561 RF_ACTIVE); 562 if (fdc->res_ioport == 0) { 563 device_printf(dev, "cannot reserve I/O port range\n"); 564 return ENXIO; 565 } 566 fdc->portt = rman_get_bustag(fdc->res_ioport); 567 fdc->porth = rman_get_bushandle(fdc->res_ioport); 568 569 if (!ispcmcia) { 570 /* 571 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 572 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 573 * by checking the size and adjust the port address 574 * accordingly. 575 */ 576 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 577 fdc->port_off = -2; 578 579 /* 580 * Register the control port range as rid 1 if it 581 * isn't there already. Most PnP BIOSen will have 582 * already done this but non-PnP configurations don't. 583 * 584 * And some (!!) report 0x3f2-0x3f5 and completely 585 * leave out the control register! It seems that some 586 * non-antique controller chips have a different 587 * method of programming the transfer speed which 588 * doesn't require the control register, but it's 589 * mighty bogus as the chip still responds to the 590 * address for the control register. 591 */ 592 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 593 u_long ctlstart; 594 595 /* Find the control port, usually 0x3f7 */ 596 ctlstart = rman_get_start(fdc->res_ioport) + 597 fdc->port_off + 7; 598 599 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); 600 } 601 602 /* 603 * Now (finally!) allocate the control port. 604 */ 605 fdc->rid_ctl = 1; 606 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 607 &fdc->rid_ctl, 608 0ul, ~0ul, 1, RF_ACTIVE); 609 if (fdc->res_ctl == 0) { 610 device_printf(dev, 611 "cannot reserve control I/O port range\n"); 612 return ENXIO; 613 } 614 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 615 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 616 } 617 618 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 619 &fdc->rid_irq, 0ul, ~0ul, 1, 620 RF_ACTIVE); 621 if (fdc->res_irq == 0) { 622 device_printf(dev, "cannot reserve interrupt line\n"); 623 return ENXIO; 624 } 625 626 if ((fdc->flags & FDC_NODMA) == 0) { 627 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 628 &fdc->rid_drq, 0ul, ~0ul, 1, 629 RF_ACTIVE); 630 if (fdc->res_drq == 0) { 631 device_printf(dev, "cannot reserve DMA request line\n"); 632 return ENXIO; 633 } 634 fdc->dmachan = fdc->res_drq->r_start; 635 } 636 637 return 0; 638 } 639 640 void 641 fdc_release_resources(struct fdc_data *fdc) 642 { 643 device_t dev; 644 645 dev = fdc->fdc_dev; 646 if (fdc->res_irq != 0) { 647 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 648 fdc->res_irq); 649 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 650 fdc->res_irq); 651 } 652 if (fdc->res_ctl != 0) { 653 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 654 fdc->res_ctl); 655 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 656 fdc->res_ctl); 657 } 658 if (fdc->res_ioport != 0) { 659 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 660 fdc->res_ioport); 661 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 662 fdc->res_ioport); 663 } 664 if (fdc->res_drq != 0) { 665 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 666 fdc->res_drq); 667 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 668 fdc->res_drq); 669 } 670 } 671 672 /****************************************************************************/ 673 /* autoconfiguration stuff */ 674 /****************************************************************************/ 675 676 static struct isa_pnp_id fdc_ids[] = { 677 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 678 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 679 {0} 680 }; 681 682 int 683 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result) 684 { 685 struct fdc_ivars *ivars = device_get_ivars(child); 686 687 switch (which) { 688 case FDC_IVAR_FDUNIT: 689 *result = ivars->fdunit; 690 break; 691 default: 692 return ENOENT; 693 } 694 return 0; 695 } 696 697 /* 698 * fdc controller section. 699 */ 700 static int 701 fdc_probe(device_t dev) 702 { 703 int error, ic_type; 704 struct fdc_data *fdc; 705 706 fdc = device_get_softc(dev); 707 bzero(fdc, sizeof *fdc); 708 fdc->fdc_dev = dev; 709 fdc->fdctl_wr = fdctl_wr_isa; 710 711 /* Check pnp ids */ 712 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 713 if (error == ENXIO) 714 return ENXIO; 715 if (error == 0) 716 fdc->flags |= FDC_ISPNP; 717 718 /* Attempt to allocate our resources for the duration of the probe */ 719 error = fdc_alloc_resources(fdc); 720 if (error) 721 goto out; 722 723 /* First - lets reset the floppy controller */ 724 fdout_wr(fdc, 0); 725 DELAY(100); 726 fdout_wr(fdc, FDO_FRST); 727 728 /* see if it can handle a command */ 729 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 730 NE7_SPEC_2(2, 0), 0)) { 731 error = ENXIO; 732 goto out; 733 } 734 735 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 736 ic_type = (u_char)ic_type; 737 switch (ic_type) { 738 case 0x80: 739 device_set_desc(dev, "NEC 765 or clone"); 740 fdc->fdct = FDC_NE765; 741 break; 742 case 0x81: 743 device_set_desc(dev, "Intel 82077 or clone"); 744 fdc->fdct = FDC_I82077; 745 break; 746 case 0x90: 747 device_set_desc(dev, "NEC 72065B or clone"); 748 fdc->fdct = FDC_NE72065; 749 break; 750 default: 751 device_set_desc(dev, "generic floppy controller"); 752 fdc->fdct = FDC_UNKNOWN; 753 break; 754 } 755 } 756 757 out: 758 fdc_release_resources(fdc); 759 return (error); 760 } 761 762 /* 763 * Add a child device to the fdc controller. It will then be probed etc. 764 */ 765 static void 766 fdc_add_child(device_t dev, const char *name, int unit) 767 { 768 int disabled; 769 struct fdc_ivars *ivar; 770 device_t child; 771 772 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO); 773 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 774 ivar->fdunit = 0; 775 child = device_add_child(dev, name, unit); 776 if (child == NULL) 777 return; 778 device_set_ivars(child, ivar); 779 if (resource_int_value(name, unit, "disabled", &disabled) == 0 780 && disabled != 0) 781 device_disable(child); 782 } 783 784 int 785 fdc_attach(device_t dev) 786 { 787 struct fdc_data *fdc; 788 int i, error; 789 790 fdc = device_get_softc(dev); 791 792 callout_init(&fdc->pseudointr_ch); 793 794 error = fdc_alloc_resources(fdc); 795 if (error) { 796 device_printf(dev, "cannot re-aquire resources\n"); 797 return error; 798 } 799 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 800 INTR_TYPE_BIO, fdc_intr, fdc, &fdc->fdc_intr); 801 if (error) { 802 device_printf(dev, "cannot setup interrupt\n"); 803 return error; 804 } 805 fdc->fdcu = device_get_unit(dev); 806 fdc->flags |= FDC_ATTACHED; 807 808 if ((fdc->flags & FDC_NODMA) == 0) { 809 /* Acquire the DMA channel forever, The driver will do the rest */ 810 /* XXX should integrate with rman */ 811 isa_dma_acquire(fdc->dmachan); 812 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */); 813 } 814 fdc->state = DEVIDLE; 815 816 /* reset controller, turn motor off, clear fdout mirror reg */ 817 fdout_wr(fdc, ((fdc->fdout = 0))); 818 bufq_init(&fdc->head); 819 820 /* 821 * Probe and attach any children. We should probably detect 822 * devices from the BIOS unless overridden. 823 */ 824 for (i = resource_query_string(-1, "at", device_get_nameunit(dev)); 825 i != -1; 826 i = resource_query_string(i, "at", device_get_nameunit(dev))) 827 fdc_add_child(dev, resource_query_name(i), 828 resource_query_unit(i)); 829 830 return (bus_generic_attach(dev)); 831 } 832 833 int 834 fdc_print_child(device_t me, device_t child) 835 { 836 int retval = 0; 837 838 retval += bus_print_child_header(me, child); 839 retval += printf(" on %s drive %d\n", device_get_nameunit(me), 840 fdc_get_fdunit(child)); 841 842 return (retval); 843 } 844 845 static device_method_t fdc_methods[] = { 846 /* Device interface */ 847 DEVMETHOD(device_probe, fdc_probe), 848 DEVMETHOD(device_attach, fdc_attach), 849 DEVMETHOD(device_detach, bus_generic_detach), 850 DEVMETHOD(device_shutdown, bus_generic_shutdown), 851 DEVMETHOD(device_suspend, bus_generic_suspend), 852 DEVMETHOD(device_resume, bus_generic_resume), 853 854 /* Bus interface */ 855 DEVMETHOD(bus_print_child, fdc_print_child), 856 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 857 /* Our children never use any other bus interface methods. */ 858 859 { 0, 0 } 860 }; 861 862 static driver_t fdc_driver = { 863 "fdc", 864 fdc_methods, 865 sizeof(struct fdc_data) 866 }; 867 868 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 869 870 /******************************************************************/ 871 /* 872 * devices attached to the controller section. 873 */ 874 static int 875 fd_probe(device_t dev) 876 { 877 int i; 878 u_int fdt, st0, st3; 879 struct fd_data *fd; 880 struct fdc_data *fdc; 881 fdsu_t fdsu; 882 static int fd_fifo = 0; 883 884 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 885 fd = device_get_softc(dev); 886 fdc = device_get_softc(device_get_parent(dev)); 887 888 bzero(fd, sizeof *fd); 889 fd->dev = dev; 890 fd->fdc = fdc; 891 fd->fdsu = fdsu; 892 fd->fdu = device_get_unit(dev); 893 894 #ifdef __i386__ 895 /* look up what bios thinks we have */ 896 switch (fd->fdu) { 897 case 0: 898 if ((fdc->flags & FDC_ISPCMCIA)) 899 fdt = RTCFDT_144M; 900 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0) 901 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED; 902 else 903 fdt = (rtcin(RTC_FDISKETTE) & 0xf0); 904 break; 905 case 1: 906 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0); 907 break; 908 default: 909 fdt = RTCFDT_NONE; 910 break; 911 } 912 #else 913 fdt = RTCFDT_144M; /* XXX probably */ 914 #endif 915 916 /* is there a unit? */ 917 if (fdt == RTCFDT_NONE) 918 return (ENXIO); 919 920 /* select it */ 921 set_motor(fdc, fdsu, TURNON); 922 DELAY(1000000); /* 1 sec */ 923 924 /* XXX This doesn't work before the first set_motor() */ 925 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN 926 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 927 && enable_fifo(fdc) == 0) { 928 device_printf(device_get_parent(dev), 929 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 930 } 931 fd_fifo = 1; 932 933 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) 934 && (st3 & NE7_ST3_T0)) { 935 /* if at track 0, first seek inwards */ 936 /* seek some steps: */ 937 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0); 938 DELAY(300000); /* ...wait a moment... */ 939 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */ 940 } 941 942 /* If we're at track 0 first seek inwards. */ 943 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) { 944 /* Seek some steps... */ 945 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 946 /* ...wait a moment... */ 947 DELAY(300000); 948 /* make ctrlr happy: */ 949 fd_sense_int(fdc, 0, 0); 950 } 951 } 952 953 for (i = 0; i < 2; i++) { 954 /* 955 * we must recalibrate twice, just in case the 956 * heads have been beyond cylinder 76, since most 957 * FDCs still barf when attempting to recalibrate 958 * more than 77 steps 959 */ 960 /* go back to 0: */ 961 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 962 /* a second being enough for full stroke seek*/ 963 DELAY(i == 0 ? 1000000 : 300000); 964 965 /* anything responding? */ 966 if (fd_sense_int(fdc, &st0, 0) == 0 && 967 (st0 & NE7_ST0_EC) == 0) 968 break; /* already probed succesfully */ 969 } 970 } 971 972 set_motor(fdc, fdsu, TURNOFF); 973 974 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */ 975 return (ENXIO); 976 977 fd->track = FD_NO_TRACK; 978 fd->fdc = fdc; 979 fd->fdsu = fdsu; 980 fd->options = 0; 981 callout_init(&fd->toffhandle); 982 callout_init(&fd->tohandle); 983 callout_init(&fd->motor); 984 985 switch (fdt) { 986 case RTCFDT_12M: 987 device_set_desc(dev, "1200-KB 5.25\" drive"); 988 fd->type = FD_1200; 989 break; 990 case RTCFDT_144M | RTCFDT_144M_PRETENDED: 991 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive"); 992 fdt = RTCFDT_144M; 993 fd->type = FD_1440; 994 case RTCFDT_144M: 995 device_set_desc(dev, "1440-KB 3.5\" drive"); 996 fd->type = FD_1440; 997 break; 998 case RTCFDT_288M: 999 case RTCFDT_288M_1: 1000 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 1001 fd->type = FD_1440; 1002 break; 1003 case RTCFDT_360K: 1004 device_set_desc(dev, "360-KB 5.25\" drive"); 1005 fd->type = FD_360; 1006 break; 1007 case RTCFDT_720K: 1008 printf("720-KB 3.5\" drive"); 1009 fd->type = FD_720; 1010 break; 1011 default: 1012 return (ENXIO); 1013 } 1014 return (0); 1015 } 1016 1017 static int 1018 fd_attach(device_t dev) 1019 { 1020 struct fd_data *fd; 1021 #if 0 1022 int i; 1023 int mynor; 1024 int typemynor; 1025 int typesize; 1026 #endif 1027 1028 fd = device_get_softc(dev); 1029 1030 cdevsw_add(&fd_cdevsw, -1 << 6, fd->fdu << 6); 1031 make_dev(&fd_cdevsw, (fd->fdu << 6), 1032 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu); 1033 1034 #if 0 1035 /* Other make_dev() go here. */ 1036 #endif 1037 1038 /* 1039 * Export the drive to the devstat interface. 1040 */ 1041 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1042 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS, 1043 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1044 DEVSTAT_PRIORITY_FD); 1045 return (0); 1046 } 1047 1048 static int 1049 fd_detach(device_t dev) 1050 { 1051 struct fd_data *fd; 1052 1053 fd = device_get_softc(dev); 1054 callout_stop(&fd->toffhandle); 1055 callout_stop(&fd->motor); 1056 1057 return (0); 1058 } 1059 1060 static device_method_t fd_methods[] = { 1061 /* Device interface */ 1062 DEVMETHOD(device_probe, fd_probe), 1063 DEVMETHOD(device_attach, fd_attach), 1064 DEVMETHOD(device_detach, fd_detach), 1065 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1066 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1067 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1068 1069 { 0, 0 } 1070 }; 1071 1072 static driver_t fd_driver = { 1073 "fd", 1074 fd_methods, 1075 sizeof(struct fd_data) 1076 }; 1077 1078 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1079 1080 /****************************************************************************/ 1081 /* motor control stuff */ 1082 /* remember to not deselect the drive we're working on */ 1083 /****************************************************************************/ 1084 static void 1085 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1086 { 1087 int fdout = fdc->fdout; 1088 int needspecify = 0; 1089 1090 if(turnon) { 1091 fdout &= ~FDO_FDSEL; 1092 fdout |= (FDO_MOEN0 << fdsu) + fdsu; 1093 } else 1094 fdout &= ~(FDO_MOEN0 << fdsu); 1095 1096 if(!turnon 1097 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0) 1098 /* gonna turn off the last drive, put FDC to bed */ 1099 fdout &= ~ (FDO_FRST|FDO_FDMAEN); 1100 else { 1101 /* make sure controller is selected and specified */ 1102 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0) 1103 needspecify = 1; 1104 fdout |= (FDO_FRST|FDO_FDMAEN); 1105 } 1106 1107 fdout_wr(fdc, fdout); 1108 fdc->fdout = fdout; 1109 TRACE1("[0x%x->FDOUT]", fdout); 1110 1111 if (needspecify) { 1112 /* 1113 * XXX 1114 * special case: since we have just woken up the FDC 1115 * from its sleep, we silently assume the command will 1116 * be accepted, and do not test for a timeout 1117 */ 1118 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1119 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1120 0); 1121 if (fdc->flags & FDC_HAS_FIFO) 1122 (void) enable_fifo(fdc); 1123 } 1124 } 1125 1126 static void 1127 fd_turnoff(void *xfd) 1128 { 1129 int s; 1130 fd_p fd = xfd; 1131 1132 TRACE1("[fd%d: turnoff]", fd->fdu); 1133 1134 s = splbio(); 1135 /* 1136 * Don't turn off the motor yet if the drive is active. 1137 * 1138 * If we got here, this could only mean we missed an interrupt. 1139 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1140 * after a controller reset. Just schedule a pseudo-interrupt 1141 * so the state machine gets re-entered. 1142 */ 1143 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1144 fdc_intr(fd->fdc); 1145 splx(s); 1146 return; 1147 } 1148 1149 fd->flags &= ~FD_MOTOR; 1150 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1151 splx(s); 1152 } 1153 1154 static void 1155 fd_motor_on(void *xfd) 1156 { 1157 int s; 1158 fd_p fd = xfd; 1159 1160 s = splbio(); 1161 fd->flags &= ~FD_MOTOR_WAIT; 1162 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1163 { 1164 fdc_intr(fd->fdc); 1165 } 1166 splx(s); 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 int s; 1388 fdu_t fdu; 1389 fdc_p fdc; 1390 fd_p fd; 1391 size_t fdblk; 1392 1393 fdu = FDUNIT(minor(bp->b_dev)); 1394 fd = devclass_get_softc(fd_devclass, fdu); 1395 if (fd == 0) 1396 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1397 (u_long)major(bp->b_dev), (u_long)minor(bp->b_dev)); 1398 fdc = fd->fdc; 1399 if (fd->type == NO_TYPE) { 1400 bp->b_error = ENXIO; 1401 bp->b_flags |= B_ERROR; 1402 goto bad; 1403 }; 1404 1405 fdblk = 128 << (fd->ft->secsize); 1406 if (!(bp->b_flags & B_FORMAT)) { 1407 if (bp->b_blkno < 0) { 1408 printf( 1409 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n", 1410 fdu, (u_long)bp->b_blkno, bp->b_bcount); 1411 bp->b_error = EINVAL; 1412 bp->b_flags |= B_ERROR; 1413 goto bad; 1414 } 1415 if ((bp->b_bcount % fdblk) != 0) { 1416 bp->b_error = EINVAL; 1417 bp->b_flags |= B_ERROR; 1418 goto bad; 1419 } 1420 } 1421 1422 /* 1423 * Set up block calculations. 1424 */ 1425 if (bp->b_blkno > 20000000) { 1426 /* 1427 * Reject unreasonably high block number, prevent the 1428 * multiplication below from overflowing. 1429 */ 1430 bp->b_error = EINVAL; 1431 bp->b_flags |= B_ERROR; 1432 goto bad; 1433 } 1434 blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk; 1435 nblocks = fd->ft->size; 1436 bp->b_resid = 0; 1437 if (blknum + (bp->b_bcount / fdblk) > nblocks) { 1438 if (blknum <= nblocks) { 1439 cando = (nblocks - blknum) * fdblk; 1440 bp->b_resid = bp->b_bcount - cando; 1441 if (cando == 0) 1442 goto bad; /* not actually bad but EOF */ 1443 } else { 1444 bp->b_error = EINVAL; 1445 bp->b_flags |= B_ERROR; 1446 goto bad; 1447 } 1448 } 1449 bp->b_pblkno = bp->b_blkno; 1450 s = splbio(); 1451 bufqdisksort(&fdc->head, bp); 1452 callout_stop(&fd->toffhandle); 1453 1454 /* Tell devstat we are starting on the transaction */ 1455 devstat_start_transaction(&fd->device_stats); 1456 device_busy(fd->dev); 1457 1458 fdstart(fdc); 1459 splx(s); 1460 return; 1461 1462 bad: 1463 biodone(bp); 1464 } 1465 1466 /***************************************************************\ 1467 * fdstart * 1468 * We have just queued something.. if the controller is not busy * 1469 * then simulate the case where it has just finished a command * 1470 * So that it (the interrupt routine) looks on the queue for more* 1471 * work to do and picks up what we just added. * 1472 * If the controller is already busy, we need do nothing, as it * 1473 * will pick up our work when the present work completes * 1474 \***************************************************************/ 1475 static void 1476 fdstart(struct fdc_data *fdc) 1477 { 1478 int s; 1479 1480 s = splbio(); 1481 if(fdc->state == DEVIDLE) 1482 { 1483 fdc_intr(fdc); 1484 } 1485 splx(s); 1486 } 1487 1488 static void 1489 fd_iotimeout(void *xfdc) 1490 { 1491 fdc_p fdc; 1492 int s; 1493 1494 fdc = xfdc; 1495 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1496 1497 /* 1498 * Due to IBM's brain-dead design, the FDC has a faked ready 1499 * signal, hardwired to ready == true. Thus, any command 1500 * issued if there's no diskette in the drive will _never_ 1501 * complete, and must be aborted by resetting the FDC. 1502 * Many thanks, Big Blue! 1503 * The FDC must not be reset directly, since that would 1504 * interfere with the state machine. Instead, pretend that 1505 * the command completed but was invalid. The state machine 1506 * will reset the FDC and retry once. 1507 */ 1508 s = splbio(); 1509 fdc->status[0] = NE7_ST0_IC_IV; 1510 fdc->flags &= ~FDC_STAT_VALID; 1511 fdc->state = IOTIMEDOUT; 1512 fdc_intr(fdc); 1513 splx(s); 1514 } 1515 1516 /* just ensure it has the right spl */ 1517 static void 1518 fd_pseudointr(void *xfdc) 1519 { 1520 int s; 1521 1522 s = splbio(); 1523 fdc_intr(xfdc); 1524 splx(s); 1525 } 1526 1527 /***********************************************************************\ 1528 * fdintr * 1529 * keep calling the state machine until it returns a 0 * 1530 * ALWAYS called at SPLBIO * 1531 \***********************************************************************/ 1532 static void 1533 fdc_intr(void *xfdc) 1534 { 1535 fdc_p fdc = xfdc; 1536 while(fdstate(fdc)) 1537 ; 1538 } 1539 1540 /* 1541 * magic pseudo-DMA initialization for YE FDC. Sets count and 1542 * direction 1543 */ 1544 #define SET_BCDR(fdc,wr,cnt,port) \ 1545 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1546 ((cnt)-1) & 0xff); \ 1547 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1548 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1549 1550 /* 1551 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy 1552 */ 1553 static int fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count) 1554 { 1555 u_char *cptr = (u_char *)addr; 1556 1557 if (flags & B_READ) { 1558 if (fdc->state != PIOREAD) { 1559 fdc->state = PIOREAD; 1560 return(0); 1561 }; 1562 SET_BCDR(fdc, 0, count, 0); 1563 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1564 FDC_YE_DATAPORT, cptr, count); 1565 } else { 1566 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1567 FDC_YE_DATAPORT, cptr, count); 1568 SET_BCDR(fdc, 0, count, 0); 1569 }; 1570 return(1); 1571 } 1572 1573 /***********************************************************************\ 1574 * The controller state machine. * 1575 * if it returns a non zero value, it should be called again immediatly * 1576 \***********************************************************************/ 1577 static int 1578 fdstate(fdc_p fdc) 1579 { 1580 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3; 1581 unsigned blknum = 0, b_cylinder = 0; 1582 fdu_t fdu = fdc->fdu; 1583 fd_p fd; 1584 struct buf *bp; 1585 struct fd_formb *finfo = NULL; 1586 size_t fdblk; 1587 1588 bp = fdc->bp; 1589 if (bp == NULL) { 1590 bp = bufq_first(&fdc->head); 1591 if (bp != NULL) { 1592 bufq_remove(&fdc->head, bp); 1593 fdc->bp = bp; 1594 } 1595 } 1596 if (bp == NULL) { 1597 /***********************************************\ 1598 * nothing left for this controller to do * 1599 * Force into the IDLE state, * 1600 \***********************************************/ 1601 fdc->state = DEVIDLE; 1602 if (fdc->fd) { 1603 device_printf(fdc->fdc_dev, 1604 "unexpected valid fd pointer\n"); 1605 fdc->fd = (fd_p) 0; 1606 fdc->fdu = -1; 1607 } 1608 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1609 return (0); 1610 } 1611 fdu = FDUNIT(minor(bp->b_dev)); 1612 fd = devclass_get_softc(fd_devclass, fdu); 1613 fdblk = 128 << fd->ft->secsize; 1614 if (fdc->fd && (fd != fdc->fd)) 1615 device_printf(fd->dev, "confused fd pointers\n"); 1616 read = bp->b_flags & B_READ; 1617 format = bp->b_flags & B_FORMAT; 1618 if (format) { 1619 finfo = (struct fd_formb *)bp->b_data; 1620 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 1621 - (char *)finfo; 1622 } 1623 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) { 1624 blknum = (unsigned) bp->b_pblkno * DEV_BSIZE/fdblk + 1625 fd->skip/fdblk; 1626 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 1627 } 1628 TRACE1("fd%d", fdu); 1629 TRACE1("[%s]", fdstates[fdc->state]); 1630 TRACE1("(0x%x)", fd->flags); 1631 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd); 1632 switch (fdc->state) 1633 { 1634 case DEVIDLE: 1635 case FINDWORK: /* we have found new work */ 1636 fdc->retry = 0; 1637 fd->skip = 0; 1638 fdc->fd = fd; 1639 fdc->fdu = fdu; 1640 fdc->fdctl_wr(fdc, fd->ft->trans); 1641 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 1642 /*******************************************************\ 1643 * If the next drive has a motor startup pending, then * 1644 * it will start up in its own good time * 1645 \*******************************************************/ 1646 if(fd->flags & FD_MOTOR_WAIT) { 1647 fdc->state = MOTORWAIT; 1648 return (0); /* come back later */ 1649 } 1650 /*******************************************************\ 1651 * Maybe if it's not starting, it SHOULD be starting * 1652 \*******************************************************/ 1653 if (!(fd->flags & FD_MOTOR)) 1654 { 1655 fdc->state = MOTORWAIT; 1656 fd_turnon(fd); 1657 return (0); 1658 } 1659 else /* at least make sure we are selected */ 1660 { 1661 set_motor(fdc, fd->fdsu, TURNON); 1662 } 1663 if (fdc->flags & FDC_NEEDS_RESET) { 1664 fdc->state = RESETCTLR; 1665 fdc->flags &= ~FDC_NEEDS_RESET; 1666 } else 1667 fdc->state = DOSEEK; 1668 break; 1669 case DOSEEK: 1670 if (b_cylinder == (unsigned)fd->track) 1671 { 1672 fdc->state = SEEKCOMPLETE; 1673 break; 1674 } 1675 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 1676 fd->fdsu, b_cylinder * fd->ft->steptrac, 1677 0)) 1678 { 1679 /* 1680 * seek command not accepted, looks like 1681 * the FDC went off to the Saints... 1682 */ 1683 fdc->retry = 6; /* try a reset */ 1684 return(retrier(fdc)); 1685 } 1686 fd->track = FD_NO_TRACK; 1687 fdc->state = SEEKWAIT; 1688 return(0); /* will return later */ 1689 case SEEKWAIT: 1690 /* allow heads to settle */ 1691 callout_reset(&fdc->pseudointr_ch, hz / 16, 1692 fd_pseudointr, fdc); 1693 fdc->state = SEEKCOMPLETE; 1694 return(0); /* will return later */ 1695 case SEEKCOMPLETE : /* SEEK DONE, START DMA */ 1696 /* Make sure seek really happened*/ 1697 if(fd->track == FD_NO_TRACK) { 1698 int descyl = b_cylinder * fd->ft->steptrac; 1699 do { 1700 /* 1701 * This might be a "ready changed" interrupt, 1702 * which cannot really happen since the 1703 * RDY pin is hardwired to + 5 volts. This 1704 * generally indicates a "bouncing" intr 1705 * line, so do one of the following: 1706 * 1707 * When running on an enhanced FDC that is 1708 * known to not go stuck after responding 1709 * with INVALID, fetch all interrupt states 1710 * until seeing either an INVALID or a 1711 * real interrupt condition. 1712 * 1713 * When running on a dumb old NE765, give 1714 * up immediately. The controller will 1715 * provide up to four dummy RC interrupt 1716 * conditions right after reset (for the 1717 * corresponding four drives), so this is 1718 * our only chance to get notice that it 1719 * was not the FDC that caused the interrupt. 1720 */ 1721 if (fd_sense_int(fdc, &st0, &cyl) 1722 == FD_NOT_VALID) 1723 return 0; 1724 if(fdc->fdct == FDC_NE765 1725 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1726 return 0; /* hope for a real intr */ 1727 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1728 1729 if (0 == descyl) { 1730 int failed = 0; 1731 /* 1732 * seek to cyl 0 requested; make sure we are 1733 * really there 1734 */ 1735 if (fd_sense_drive_status(fdc, &st3)) 1736 failed = 1; 1737 if ((st3 & NE7_ST3_T0) == 0) { 1738 printf( 1739 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 1740 fdu, st3, NE7_ST3BITS); 1741 failed = 1; 1742 } 1743 1744 if (failed) { 1745 if(fdc->retry < 3) 1746 fdc->retry = 3; 1747 return (retrier(fdc)); 1748 } 1749 } 1750 1751 if (cyl != descyl) { 1752 printf( 1753 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 1754 fdu, descyl, cyl, st0); 1755 if (fdc->retry < 3) 1756 fdc->retry = 3; 1757 return (retrier(fdc)); 1758 } 1759 } 1760 1761 fd->track = b_cylinder; 1762 if (!(fdc->flags & FDC_NODMA)) 1763 isa_dmastart(bp->b_flags, bp->b_data+fd->skip, 1764 format ? bp->b_bcount : fdblk, fdc->dmachan); 1765 sectrac = fd->ft->sectrac; 1766 sec = blknum % (sectrac * fd->ft->heads); 1767 head = sec / sectrac; 1768 sec = sec % sectrac + 1; 1769 fd->hddrv = ((head&1)<<2)+fdu; 1770 1771 if(format || !read) 1772 { 1773 /* make sure the drive is writable */ 1774 if(fd_sense_drive_status(fdc, &st3) != 0) 1775 { 1776 /* stuck controller? */ 1777 if (!(fdc->flags & FDC_NODMA)) 1778 isa_dmadone(bp->b_flags, 1779 bp->b_data + fd->skip, 1780 format ? bp->b_bcount : fdblk, 1781 fdc->dmachan); 1782 fdc->retry = 6; /* reset the beast */ 1783 return (retrier(fdc)); 1784 } 1785 if(st3 & NE7_ST3_WP) 1786 { 1787 /* 1788 * XXX YES! this is ugly. 1789 * in order to force the current operation 1790 * to fail, we will have to fake an FDC 1791 * error - all error handling is done 1792 * by the retrier() 1793 */ 1794 fdc->status[0] = NE7_ST0_IC_AT; 1795 fdc->status[1] = NE7_ST1_NW; 1796 fdc->status[2] = 0; 1797 fdc->status[3] = fd->track; 1798 fdc->status[4] = head; 1799 fdc->status[5] = sec; 1800 fdc->retry = 8; /* break out immediately */ 1801 fdc->state = IOTIMEDOUT; /* not really... */ 1802 return (1); 1803 } 1804 } 1805 1806 if (format) { 1807 if (fdc->flags & FDC_NODMA) { 1808 /* 1809 * This seems to be necessary for 1810 * whatever obscure reason; if we omit 1811 * it, we end up filling the sector ID 1812 * fields of the newly formatted track 1813 * entirely with garbage, causing 1814 * `wrong cylinder' errors all over 1815 * the place when trying to read them 1816 * back. 1817 * 1818 * Umpf. 1819 */ 1820 SET_BCDR(fdc, 1, bp->b_bcount, 0); 1821 1822 (void)fdcpio(fdc,bp->b_flags, 1823 bp->b_data+fd->skip, 1824 bp->b_bcount); 1825 1826 } 1827 /* formatting */ 1828 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu, 1829 finfo->fd_formb_secshift, 1830 finfo->fd_formb_nsecs, 1831 finfo->fd_formb_gaplen, 1832 finfo->fd_formb_fillbyte, 0)) { 1833 /* controller fell over */ 1834 if (!(fdc->flags & FDC_NODMA)) 1835 isa_dmadone(bp->b_flags, 1836 bp->b_data + fd->skip, 1837 format ? bp->b_bcount : fdblk, 1838 fdc->dmachan); 1839 fdc->retry = 6; 1840 return (retrier(fdc)); 1841 } 1842 } else { 1843 if (fdc->flags & FDC_NODMA) { 1844 /* 1845 * this seems to be necessary even when 1846 * reading data 1847 */ 1848 SET_BCDR(fdc, 1, fdblk, 0); 1849 1850 /* 1851 * perform the write pseudo-DMA before 1852 * the WRITE command is sent 1853 */ 1854 if (!read) 1855 (void)fdcpio(fdc,bp->b_flags, 1856 bp->b_data+fd->skip, 1857 fdblk); 1858 } 1859 if (fd_cmd(fdc, 9, 1860 (read ? NE7CMD_READ : NE7CMD_WRITE), 1861 head << 2 | fdu, /* head & unit */ 1862 fd->track, /* track */ 1863 head, 1864 sec, /* sector + 1 */ 1865 fd->ft->secsize, /* sector size */ 1866 sectrac, /* sectors/track */ 1867 fd->ft->gap, /* gap size */ 1868 fd->ft->datalen, /* data length */ 1869 0)) { 1870 /* the beast is sleeping again */ 1871 if (!(fdc->flags & FDC_NODMA)) 1872 isa_dmadone(bp->b_flags, 1873 bp->b_data + fd->skip, 1874 format ? bp->b_bcount : fdblk, 1875 fdc->dmachan); 1876 fdc->retry = 6; 1877 return (retrier(fdc)); 1878 } 1879 } 1880 if (fdc->flags & FDC_NODMA) 1881 /* 1882 * if this is a read, then simply await interrupt 1883 * before performing PIO 1884 */ 1885 if (read && !fdcpio(fdc,bp->b_flags, 1886 bp->b_data+fd->skip,fdblk)) { 1887 callout_reset(&fd->tohandle, hz, 1888 fd_iotimeout, fdc); 1889 return(0); /* will return later */ 1890 }; 1891 1892 /* 1893 * write (or format) operation will fall through and 1894 * await completion interrupt 1895 */ 1896 fdc->state = IOCOMPLETE; 1897 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc); 1898 return (0); /* will return later */ 1899 case PIOREAD: 1900 /* 1901 * actually perform the PIO read. The IOCOMPLETE case 1902 * removes the timeout for us. 1903 */ 1904 (void)fdcpio(fdc,bp->b_flags,bp->b_data+fd->skip,fdblk); 1905 fdc->state = IOCOMPLETE; 1906 /* FALLTHROUGH */ 1907 case IOCOMPLETE: /* IO DONE, post-analyze */ 1908 callout_stop(&fd->tohandle); 1909 1910 if (fd_read_status(fdc, fd->fdsu)) { 1911 if (!(fdc->flags & FDC_NODMA)) 1912 isa_dmadone(bp->b_flags, bp->b_data + fd->skip, 1913 format ? bp->b_bcount : fdblk, 1914 fdc->dmachan); 1915 if (fdc->retry < 6) 1916 fdc->retry = 6; /* force a reset */ 1917 return (retrier(fdc)); 1918 } 1919 1920 fdc->state = IOTIMEDOUT; 1921 1922 /* FALLTHROUGH */ 1923 1924 case IOTIMEDOUT: 1925 if (!(fdc->flags & FDC_NODMA)) 1926 isa_dmadone(bp->b_flags, bp->b_data + fd->skip, 1927 format ? bp->b_bcount : fdblk, fdc->dmachan); 1928 if (fdc->status[0] & NE7_ST0_IC) { 1929 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1930 && fdc->status[1] & NE7_ST1_OR) { 1931 /* 1932 * DMA overrun. Someone hogged the bus and 1933 * didn't release it in time for the next 1934 * FDC transfer. 1935 * 1936 * We normally restart this without bumping 1937 * the retry counter. However, in case 1938 * something is seriously messed up (like 1939 * broken hardware), we rather limit the 1940 * number of retries so the IO operation 1941 * doesn't block indefinately. 1942 */ 1943 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 1944 fdc->state = SEEKCOMPLETE; 1945 return (1); 1946 } /* else fall through */ 1947 } 1948 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 1949 && fdc->retry < 6) 1950 fdc->retry = 6; /* force a reset */ 1951 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1952 && fdc->status[2] & NE7_ST2_WC 1953 && fdc->retry < 3) 1954 fdc->retry = 3; /* force recalibrate */ 1955 return (retrier(fdc)); 1956 } 1957 /* All OK */ 1958 /* Operation successful, retry DMA overruns again next time. */ 1959 fdc->dma_overruns = 0; 1960 fd->skip += fdblk; 1961 if (!format && fd->skip < bp->b_bcount - bp->b_resid) { 1962 /* set up next transfer */ 1963 fdc->state = DOSEEK; 1964 } else { 1965 /* ALL DONE */ 1966 fd->skip = 0; 1967 fdc->bp = NULL; 1968 device_unbusy(fd->dev); 1969 devstat_end_transaction_buf(&fd->device_stats, bp); 1970 biodone(bp); 1971 fdc->fd = (fd_p) 0; 1972 fdc->fdu = -1; 1973 fdc->state = FINDWORK; 1974 } 1975 return (1); 1976 case RESETCTLR: 1977 fdc_reset(fdc); 1978 fdc->retry++; 1979 fdc->state = RESETCOMPLETE; 1980 return (0); 1981 case RESETCOMPLETE: 1982 /* 1983 * Discard all the results from the reset so that they 1984 * can't cause an unexpected interrupt later. 1985 */ 1986 for (i = 0; i < 4; i++) 1987 (void)fd_sense_int(fdc, &st0, &cyl); 1988 fdc->state = STARTRECAL; 1989 /* Fall through. */ 1990 case STARTRECAL: 1991 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 1992 /* arrgl */ 1993 fdc->retry = 6; 1994 return (retrier(fdc)); 1995 } 1996 fdc->state = RECALWAIT; 1997 return (0); /* will return later */ 1998 case RECALWAIT: 1999 /* allow heads to settle */ 2000 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc); 2001 fdc->state = RECALCOMPLETE; 2002 return (0); /* will return later */ 2003 case RECALCOMPLETE: 2004 do { 2005 /* 2006 * See SEEKCOMPLETE for a comment on this: 2007 */ 2008 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2009 return 0; 2010 if(fdc->fdct == FDC_NE765 2011 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2012 return 0; /* hope for a real intr */ 2013 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2014 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2015 { 2016 if(fdc->retry > 3) 2017 /* 2018 * a recalibrate from beyond cylinder 77 2019 * will "fail" due to the FDC limitations; 2020 * since people used to complain much about 2021 * the failure message, try not logging 2022 * this one if it seems to be the first 2023 * time in a line 2024 */ 2025 printf("fd%d: recal failed ST0 %b cyl %d\n", 2026 fdu, st0, NE7_ST0BITS, cyl); 2027 if(fdc->retry < 3) fdc->retry = 3; 2028 return (retrier(fdc)); 2029 } 2030 fd->track = 0; 2031 /* Seek (probably) necessary */ 2032 fdc->state = DOSEEK; 2033 return (1); /* will return immediatly */ 2034 case MOTORWAIT: 2035 if(fd->flags & FD_MOTOR_WAIT) 2036 { 2037 return (0); /* time's not up yet */ 2038 } 2039 if (fdc->flags & FDC_NEEDS_RESET) { 2040 fdc->state = RESETCTLR; 2041 fdc->flags &= ~FDC_NEEDS_RESET; 2042 } else { 2043 /* 2044 * If all motors were off, then the controller was 2045 * reset, so it has lost track of the current 2046 * cylinder. Recalibrate to handle this case. 2047 * But first, discard the results of the reset. 2048 */ 2049 fdc->state = RESETCOMPLETE; 2050 } 2051 return (1); /* will return immediatly */ 2052 default: 2053 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2054 if (fd_read_status(fdc, fd->fdsu) == 0) 2055 printf("FDC status :%x %x %x %x %x %x %x ", 2056 fdc->status[0], 2057 fdc->status[1], 2058 fdc->status[2], 2059 fdc->status[3], 2060 fdc->status[4], 2061 fdc->status[5], 2062 fdc->status[6] ); 2063 else 2064 printf("No status available "); 2065 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2066 { 2067 printf("[controller is dead now]\n"); 2068 return (0); 2069 } 2070 printf("ST0 = %x, PCN = %x\n", st0, cyl); 2071 return (0); 2072 } 2073 /*XXX confusing: some branches return immediately, others end up here*/ 2074 return (1); /* Come back immediatly to new state */ 2075 } 2076 2077 static int 2078 retrier(struct fdc_data *fdc) 2079 { 2080 struct buf *bp; 2081 struct fd_data *fd; 2082 int fdu; 2083 2084 bp = fdc->bp; 2085 2086 /* XXX shouldn't this be cached somewhere? */ 2087 fdu = FDUNIT(minor(bp->b_dev)); 2088 fd = devclass_get_softc(fd_devclass, fdu); 2089 if (fd->options & FDOPT_NORETRY) 2090 goto fail; 2091 2092 switch (fdc->retry) { 2093 case 0: case 1: case 2: 2094 fdc->state = SEEKCOMPLETE; 2095 break; 2096 case 3: case 4: case 5: 2097 fdc->state = STARTRECAL; 2098 break; 2099 case 6: 2100 fdc->state = RESETCTLR; 2101 break; 2102 case 7: 2103 break; 2104 default: 2105 fail: 2106 { 2107 int printerror = (fd->options & FDOPT_NOERRLOG) == 0; 2108 2109 if (printerror) { 2110 /* 2111 * note: use the correct device for more 2112 * verbose error reporting. 2113 */ 2114 dev_t subdev; 2115 2116 subdev = make_sub_dev(bp->b_dev, 2117 (FDUNIT(minor(bp->b_dev))<<3)|RAW_PART); 2118 diskerr(bp, subdev, 2119 "hard error", LOG_PRINTF, 2120 fdc->fd->skip / DEV_BSIZE, 2121 (struct disklabel *)NULL); 2122 } 2123 if (printerror) { 2124 if (fdc->flags & FDC_STAT_VALID) 2125 printf( 2126 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2127 fdc->status[0], NE7_ST0BITS, 2128 fdc->status[1], NE7_ST1BITS, 2129 fdc->status[2], NE7_ST2BITS, 2130 fdc->status[3], fdc->status[4], 2131 fdc->status[5]); 2132 else 2133 printf(" (No status)\n"); 2134 } 2135 } 2136 bp->b_flags |= B_ERROR; 2137 bp->b_error = EIO; 2138 bp->b_resid += bp->b_bcount - fdc->fd->skip; 2139 fdc->bp = NULL; 2140 fdc->fd->skip = 0; 2141 device_unbusy(fd->dev); 2142 devstat_end_transaction_buf(&fdc->fd->device_stats, bp); 2143 biodone(bp); 2144 fdc->state = FINDWORK; 2145 fdc->flags |= FDC_NEEDS_RESET; 2146 fdc->fd = (fd_p) 0; 2147 fdc->fdu = -1; 2148 return (1); 2149 } 2150 fdc->retry++; 2151 return (1); 2152 } 2153 2154 static int 2155 fdformat(dev_t dev, struct fd_formb *finfo, struct thread *td) 2156 { 2157 struct proc *p = td->td_proc; 2158 fdu_t fdu; 2159 fd_p fd; 2160 2161 struct buf *bp; 2162 int rv = 0, s; 2163 size_t fdblk; 2164 2165 fdu = FDUNIT(minor(dev)); 2166 fd = devclass_get_softc(fd_devclass, fdu); 2167 fdblk = 128 << fd->ft->secsize; 2168 2169 /* set up a buffer header for fdstrategy() */ 2170 bp = malloc(sizeof(struct buf), M_TEMP, M_WAITOK | M_ZERO); 2171 2172 /* 2173 * keep the process from being swapped 2174 */ 2175 PHOLD(p); 2176 BUF_LOCKINIT(bp); 2177 BUF_LOCK(bp, LK_EXCLUSIVE); 2178 bp->b_flags = B_PHYS | B_FORMAT; 2179 2180 /* 2181 * calculate a fake blkno, so fdstrategy() would initiate a 2182 * seek to the requested cylinder 2183 */ 2184 bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads) 2185 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE; 2186 2187 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; 2188 bp->b_data = (caddr_t)finfo; 2189 2190 /* now do the format */ 2191 bp->b_dev = dev; 2192 BUF_STRATEGY(bp, 0); 2193 2194 /* ...and wait for it to complete */ 2195 s = splbio(); 2196 while(!(bp->b_flags & B_DONE)) { 2197 rv = tsleep((caddr_t)bp, 0, "fdform", 20 * hz); 2198 if (rv == EWOULDBLOCK) 2199 break; 2200 } 2201 splx(s); 2202 2203 if (rv == EWOULDBLOCK) { 2204 /* timed out */ 2205 rv = EIO; 2206 device_unbusy(fd->dev); 2207 biodone(bp); 2208 } 2209 if (bp->b_flags & B_ERROR) 2210 rv = bp->b_error; 2211 /* 2212 * allow the process to be swapped 2213 */ 2214 PRELE(p); 2215 BUF_UNLOCK(bp); 2216 BUF_LOCKFREE(bp); 2217 free(bp, M_TEMP); 2218 return rv; 2219 } 2220 2221 /* 2222 * TODO: don't allocate buffer on stack. 2223 */ 2224 2225 static int 2226 fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 2227 { 2228 fdu_t fdu = FDUNIT(minor(dev)); 2229 fd_p fd = devclass_get_softc(fd_devclass, fdu); 2230 size_t fdblk; 2231 2232 struct fd_type *fdt; 2233 struct disklabel *dl; 2234 struct fdc_status *fsp; 2235 char buffer[DEV_BSIZE]; 2236 int error = 0; 2237 2238 fdblk = 128 << fd->ft->secsize; 2239 2240 switch (cmd) { 2241 case DIOCGDINFO: 2242 bzero(buffer, sizeof (buffer)); 2243 dl = (struct disklabel *)buffer; 2244 dl->d_secsize = fdblk; 2245 fdt = fd->ft; 2246 dl->d_secpercyl = fdt->size / fdt->tracks; 2247 dl->d_type = DTYPE_FLOPPY; 2248 2249 if (readdisklabel(dev, dl) 2250 == NULL) 2251 error = 0; 2252 else 2253 error = EINVAL; 2254 2255 *(struct disklabel *)addr = *dl; 2256 break; 2257 2258 case DIOCSDINFO: 2259 if ((flag & FWRITE) == 0) 2260 error = EBADF; 2261 break; 2262 2263 case DIOCWLABEL: 2264 if ((flag & FWRITE) == 0) 2265 error = EBADF; 2266 break; 2267 2268 case DIOCWDINFO: 2269 if ((flag & FWRITE) == 0) { 2270 error = EBADF; 2271 break; 2272 } 2273 2274 dl = (struct disklabel *)addr; 2275 2276 if ((error = setdisklabel((struct disklabel *)buffer, dl, 2277 (u_long)0)) != 0) 2278 break; 2279 2280 error = writedisklabel(dev, (struct disklabel *)buffer); 2281 break; 2282 case FD_FORM: 2283 if ((flag & FWRITE) == 0) 2284 error = EBADF; /* must be opened for writing */ 2285 else if (((struct fd_formb *)addr)->format_version != 2286 FD_FORMAT_VERSION) 2287 error = EINVAL; /* wrong version of formatting prog */ 2288 else 2289 error = fdformat(dev, (struct fd_formb *)addr, td); 2290 break; 2291 2292 case FD_GTYPE: /* get drive type */ 2293 *(struct fd_type *)addr = *fd->ft; 2294 break; 2295 2296 case FD_STYPE: /* set drive type */ 2297 /* this is considered harmful; only allow for superuser */ 2298 if (suser(td) != 0) 2299 return EPERM; 2300 *fd->ft = *(struct fd_type *)addr; 2301 break; 2302 2303 case FD_GOPTS: /* get drive options */ 2304 *(int *)addr = fd->options; 2305 break; 2306 2307 case FD_SOPTS: /* set drive options */ 2308 fd->options = *(int *)addr; 2309 break; 2310 2311 case FD_GSTAT: 2312 fsp = (struct fdc_status *)addr; 2313 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2314 return EINVAL; 2315 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2316 break; 2317 2318 default: 2319 error = ENOTTY; 2320 break; 2321 } 2322 return (error); 2323 } 2324 2325 /* 2326 * Hello emacs, these are the 2327 * Local Variables: 2328 * c-indent-level: 8 2329 * c-continued-statement-offset: 8 2330 * c-continued-brace-offset: 0 2331 * c-brace-offset: -8 2332 * c-brace-imaginary-offset: 0 2333 * c-argdecl-indent: 8 2334 * c-label-offset: -8 2335 * c++-hanging-braces: 1 2336 * c++-access-specifier-offset: -8 2337 * c++-empty-arglist-indent: 8 2338 * c++-friend-offset: 0 2339 * End: 2340 */ 2341