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 1.17 2004/06/02 19:31:01 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 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_handle toffhandle; 202 struct callout_handle tohandle; 203 struct devstat device_stats; 204 device_t dev; 205 fdu_t fdu; 206 }; 207 208 struct fdc_ivars { 209 int fdunit; 210 }; 211 static devclass_t fd_devclass; 212 213 /***********************************************************************\ 214 * Throughout this file the following conventions will be used: * 215 * fd is a pointer to the fd_data struct for the drive in question * 216 * fdc is a pointer to the fdc_data struct for the controller * 217 * fdu is the floppy drive unit number * 218 * fdcu is the floppy controller unit number * 219 * fdsu is the floppy drive unit number on that controller. (sub-unit) * 220 \***********************************************************************/ 221 222 /* internal functions */ 223 static void fdc_intr(void *); 224 static void set_motor(struct fdc_data *, int, int); 225 # define TURNON 1 226 # define TURNOFF 0 227 static timeout_t fd_turnoff; 228 static timeout_t fd_motor_on; 229 static void fd_turnon(struct fd_data *); 230 static void fdc_reset(fdc_p); 231 static int fd_in(struct fdc_data *, int *); 232 static int out_fdc(struct fdc_data *, int); 233 static void fdstart(struct fdc_data *); 234 static timeout_t fd_iotimeout; 235 static timeout_t fd_pseudointr; 236 static int fdstate(struct fdc_data *); 237 static int retrier(struct fdc_data *); 238 static int fdformat(dev_t, struct fd_formb *, struct thread *); 239 240 static int enable_fifo(fdc_p fdc); 241 242 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 243 244 245 #define DEVIDLE 0 246 #define FINDWORK 1 247 #define DOSEEK 2 248 #define SEEKCOMPLETE 3 249 #define IOCOMPLETE 4 250 #define RECALCOMPLETE 5 251 #define STARTRECAL 6 252 #define RESETCTLR 7 253 #define SEEKWAIT 8 254 #define RECALWAIT 9 255 #define MOTORWAIT 10 256 #define IOTIMEDOUT 11 257 #define RESETCOMPLETE 12 258 #define PIOREAD 13 259 260 #ifdef FDC_DEBUG 261 static char const * const fdstates[] = 262 { 263 "DEVIDLE", 264 "FINDWORK", 265 "DOSEEK", 266 "SEEKCOMPLETE", 267 "IOCOMPLETE", 268 "RECALCOMPLETE", 269 "STARTRECAL", 270 "RESETCTLR", 271 "SEEKWAIT", 272 "RECALWAIT", 273 "MOTORWAIT", 274 "IOTIMEDOUT", 275 "RESETCOMPLETE", 276 "PIOREAD", 277 }; 278 279 /* CAUTION: fd_debug causes huge amounts of logging output */ 280 static int volatile fd_debug = 0; 281 #define TRACE0(arg) if(fd_debug) printf(arg) 282 #define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2) 283 #else /* FDC_DEBUG */ 284 #define TRACE0(arg) 285 #define TRACE1(arg1, arg2) 286 #endif /* FDC_DEBUG */ 287 288 void 289 fdout_wr(fdc_p fdc, u_int8_t v) 290 { 291 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 292 } 293 294 static u_int8_t 295 fdsts_rd(fdc_p fdc) 296 { 297 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 298 } 299 300 static void 301 fddata_wr(fdc_p fdc, u_int8_t v) 302 { 303 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 304 } 305 306 static u_int8_t 307 fddata_rd(fdc_p fdc) 308 { 309 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 310 } 311 312 static void 313 fdctl_wr_isa(fdc_p fdc, u_int8_t v) 314 { 315 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 316 } 317 318 #if 0 319 320 static u_int8_t 321 fdin_rd(fdc_p fdc) 322 { 323 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 324 } 325 326 #endif 327 328 static d_open_t Fdopen; /* NOTE, not fdopen */ 329 static d_close_t fdclose; 330 static d_ioctl_t fdioctl; 331 static d_strategy_t fdstrategy; 332 333 static struct cdevsw fd_cdevsw = { 334 /* name */ "fd", 335 /* maj */ FD_CDEV_MAJOR, 336 /* flags */ D_DISK, 337 /* port */ NULL, 338 /* clone */ NULL, 339 340 /* open */ Fdopen, 341 /* close */ fdclose, 342 /* read */ physread, 343 /* write */ physwrite, 344 /* ioctl */ fdioctl, 345 /* poll */ nopoll, 346 /* mmap */ nommap, 347 /* strategy */ fdstrategy, 348 /* dump */ nodump, 349 /* psize */ nopsize 350 }; 351 352 static int 353 fdc_err(struct fdc_data *fdc, const char *s) 354 { 355 fdc->fdc_errs++; 356 if (s) { 357 if (fdc->fdc_errs < FDC_ERRMAX) 358 device_printf(fdc->fdc_dev, "%s", s); 359 else if (fdc->fdc_errs == FDC_ERRMAX) 360 device_printf(fdc->fdc_dev, "too many errors, not " 361 "logging any more\n"); 362 } 363 364 return FD_FAILED; 365 } 366 367 /* 368 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 369 * Unit number, 370 * # of output bytes, output bytes as ints ..., 371 * # of input bytes, input bytes as ints ... 372 */ 373 int 374 fd_cmd(struct fdc_data *fdc, int n_out, ...) 375 { 376 u_char cmd; 377 int n_in; 378 int n; 379 __va_list ap; 380 381 __va_start(ap, n_out); 382 cmd = (u_char)(__va_arg(ap, int)); 383 __va_end(ap); 384 __va_start(ap, n_out); 385 for (n = 0; n < n_out; n++) 386 { 387 if (out_fdc(fdc, __va_arg(ap, int)) < 0) 388 { 389 char msg[50]; 390 snprintf(msg, sizeof(msg), 391 "cmd %x failed at out byte %d of %d\n", 392 cmd, n + 1, n_out); 393 return fdc_err(fdc, msg); 394 } 395 } 396 n_in = __va_arg(ap, int); 397 for (n = 0; n < n_in; n++) 398 { 399 int *ptr = __va_arg(ap, int *); 400 if (fd_in(fdc, ptr) < 0) 401 { 402 char msg[50]; 403 snprintf(msg, sizeof(msg), 404 "cmd %02x failed at in byte %d of %d\n", 405 cmd, n + 1, n_in); 406 return fdc_err(fdc, msg); 407 } 408 } 409 410 return 0; 411 } 412 413 static int 414 enable_fifo(fdc_p fdc) 415 { 416 int i, j; 417 418 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 419 420 /* 421 * XXX: 422 * Cannot use fd_cmd the normal way here, since 423 * this might be an invalid command. Thus we send the 424 * first byte, and check for an early turn of data directon. 425 */ 426 427 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 428 return fdc_err(fdc, "Enable FIFO failed\n"); 429 430 /* If command is invalid, return */ 431 j = FDSTS_TIMEOUT; 432 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 433 != NE7_RQM && j-- > 0) { 434 if (i == (NE7_DIO | NE7_RQM)) { 435 fdc_reset(fdc); 436 return FD_FAILED; 437 } 438 DELAY(1); 439 } 440 if (j<0 || 441 fd_cmd(fdc, 3, 442 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 443 fdc_reset(fdc); 444 return fdc_err(fdc, "Enable FIFO failed\n"); 445 } 446 fdc->flags |= FDC_HAS_FIFO; 447 return 0; 448 } 449 if (fd_cmd(fdc, 4, 450 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 451 return fdc_err(fdc, "Re-enable FIFO failed\n"); 452 return 0; 453 } 454 455 static int 456 fd_sense_drive_status(fdc_p fdc, int *st3p) 457 { 458 int st3; 459 460 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 461 { 462 return fdc_err(fdc, "Sense Drive Status failed\n"); 463 } 464 if (st3p) 465 *st3p = st3; 466 467 return 0; 468 } 469 470 static int 471 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 472 { 473 int cyl, st0, ret; 474 475 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 476 if (ret) { 477 (void)fdc_err(fdc, 478 "sense intr err reading stat reg 0\n"); 479 return ret; 480 } 481 482 if (st0p) 483 *st0p = st0; 484 485 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 486 /* 487 * There doesn't seem to have been an interrupt. 488 */ 489 return FD_NOT_VALID; 490 } 491 492 if (fd_in(fdc, &cyl) < 0) { 493 return fdc_err(fdc, "can't get cyl num\n"); 494 } 495 496 if (cylp) 497 *cylp = cyl; 498 499 return 0; 500 } 501 502 503 static int 504 fd_read_status(fdc_p fdc, int fdsu) 505 { 506 int i, ret; 507 508 for (i = 0; i < 7; i++) { 509 /* 510 * XXX types are poorly chosen. Only bytes can by read 511 * from the hardware, but fdc->status[] wants u_ints and 512 * fd_in() gives ints. 513 */ 514 int status; 515 516 ret = fd_in(fdc, &status); 517 fdc->status[i] = status; 518 if (ret != 0) 519 break; 520 } 521 522 if (ret == 0) 523 fdc->flags |= FDC_STAT_VALID; 524 else 525 fdc->flags &= ~FDC_STAT_VALID; 526 527 return ret; 528 } 529 530 /****************************************************************************/ 531 /* autoconfiguration stuff */ 532 /****************************************************************************/ 533 534 int 535 fdc_alloc_resources(struct fdc_data *fdc) 536 { 537 device_t dev; 538 int ispnp, ispcmcia; 539 540 dev = fdc->fdc_dev; 541 ispnp = (fdc->flags & FDC_ISPNP) != 0; 542 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 543 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 544 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 545 546 /* 547 * On standard ISA, we don't just use an 8 port range 548 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 549 * register at 0x3f6. 550 * 551 * Isn't PC hardware wonderful. 552 * 553 * The Y-E Data PCMCIA FDC doesn't have this problem, it 554 * uses the register with offset 6 for pseudo-DMA, and the 555 * one with offset 7 as control register. 556 */ 557 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 558 &fdc->rid_ioport, 0ul, ~0ul, 559 ispcmcia ? 8 : (ispnp ? 1 : 6), 560 RF_ACTIVE); 561 if (fdc->res_ioport == 0) { 562 device_printf(dev, "cannot reserve I/O port range\n"); 563 return ENXIO; 564 } 565 fdc->portt = rman_get_bustag(fdc->res_ioport); 566 fdc->porth = rman_get_bushandle(fdc->res_ioport); 567 568 if (!ispcmcia) { 569 /* 570 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 571 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 572 * by checking the size and adjust the port address 573 * accordingly. 574 */ 575 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 576 fdc->port_off = -2; 577 578 /* 579 * Register the control port range as rid 1 if it 580 * isn't there already. Most PnP BIOSen will have 581 * already done this but non-PnP configurations don't. 582 * 583 * And some (!!) report 0x3f2-0x3f5 and completely 584 * leave out the control register! It seems that some 585 * non-antique controller chips have a different 586 * method of programming the transfer speed which 587 * doesn't require the control register, but it's 588 * mighty bogus as the chip still responds to the 589 * address for the control register. 590 */ 591 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 592 u_long ctlstart; 593 594 /* Find the control port, usually 0x3f7 */ 595 ctlstart = rman_get_start(fdc->res_ioport) + 596 fdc->port_off + 7; 597 598 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); 599 } 600 601 /* 602 * Now (finally!) allocate the control port. 603 */ 604 fdc->rid_ctl = 1; 605 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 606 &fdc->rid_ctl, 607 0ul, ~0ul, 1, RF_ACTIVE); 608 if (fdc->res_ctl == 0) { 609 device_printf(dev, 610 "cannot reserve control I/O port range\n"); 611 return ENXIO; 612 } 613 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 614 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 615 } 616 617 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 618 &fdc->rid_irq, 0ul, ~0ul, 1, 619 RF_ACTIVE); 620 if (fdc->res_irq == 0) { 621 device_printf(dev, "cannot reserve interrupt line\n"); 622 return ENXIO; 623 } 624 625 if ((fdc->flags & FDC_NODMA) == 0) { 626 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 627 &fdc->rid_drq, 0ul, ~0ul, 1, 628 RF_ACTIVE); 629 if (fdc->res_drq == 0) { 630 device_printf(dev, "cannot reserve DMA request line\n"); 631 return ENXIO; 632 } 633 fdc->dmachan = fdc->res_drq->r_start; 634 } 635 636 return 0; 637 } 638 639 void 640 fdc_release_resources(struct fdc_data *fdc) 641 { 642 device_t dev; 643 644 dev = fdc->fdc_dev; 645 if (fdc->res_irq != 0) { 646 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 647 fdc->res_irq); 648 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 649 fdc->res_irq); 650 } 651 if (fdc->res_ctl != 0) { 652 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 653 fdc->res_ctl); 654 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 655 fdc->res_ctl); 656 } 657 if (fdc->res_ioport != 0) { 658 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 659 fdc->res_ioport); 660 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 661 fdc->res_ioport); 662 } 663 if (fdc->res_drq != 0) { 664 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 665 fdc->res_drq); 666 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 667 fdc->res_drq); 668 } 669 } 670 671 /****************************************************************************/ 672 /* autoconfiguration stuff */ 673 /****************************************************************************/ 674 675 static struct isa_pnp_id fdc_ids[] = { 676 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 677 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 678 {0} 679 }; 680 681 int 682 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result) 683 { 684 struct fdc_ivars *ivars = device_get_ivars(child); 685 686 switch (which) { 687 case FDC_IVAR_FDUNIT: 688 *result = ivars->fdunit; 689 break; 690 default: 691 return ENOENT; 692 } 693 return 0; 694 } 695 696 /* 697 * fdc controller section. 698 */ 699 static int 700 fdc_probe(device_t dev) 701 { 702 int error, ic_type; 703 struct fdc_data *fdc; 704 705 fdc = device_get_softc(dev); 706 bzero(fdc, sizeof *fdc); 707 fdc->fdc_dev = dev; 708 fdc->fdctl_wr = fdctl_wr_isa; 709 710 /* Check pnp ids */ 711 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 712 if (error == ENXIO) 713 return ENXIO; 714 if (error == 0) 715 fdc->flags |= FDC_ISPNP; 716 717 /* Attempt to allocate our resources for the duration of the probe */ 718 error = fdc_alloc_resources(fdc); 719 if (error) 720 goto out; 721 722 /* First - lets reset the floppy controller */ 723 fdout_wr(fdc, 0); 724 DELAY(100); 725 fdout_wr(fdc, FDO_FRST); 726 727 /* see if it can handle a command */ 728 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 729 NE7_SPEC_2(2, 0), 0)) { 730 error = ENXIO; 731 goto out; 732 } 733 734 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 735 ic_type = (u_char)ic_type; 736 switch (ic_type) { 737 case 0x80: 738 device_set_desc(dev, "NEC 765 or clone"); 739 fdc->fdct = FDC_NE765; 740 break; 741 case 0x81: 742 device_set_desc(dev, "Intel 82077 or clone"); 743 fdc->fdct = FDC_I82077; 744 break; 745 case 0x90: 746 device_set_desc(dev, "NEC 72065B or clone"); 747 fdc->fdct = FDC_NE72065; 748 break; 749 default: 750 device_set_desc(dev, "generic floppy controller"); 751 fdc->fdct = FDC_UNKNOWN; 752 break; 753 } 754 } 755 756 out: 757 fdc_release_resources(fdc); 758 return (error); 759 } 760 761 /* 762 * Add a child device to the fdc controller. It will then be probed etc. 763 */ 764 static void 765 fdc_add_child(device_t dev, const char *name, int unit) 766 { 767 int disabled; 768 struct fdc_ivars *ivar; 769 device_t child; 770 771 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO); 772 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 773 ivar->fdunit = 0; 774 child = device_add_child(dev, name, unit); 775 if (child == NULL) 776 return; 777 device_set_ivars(child, ivar); 778 if (resource_int_value(name, unit, "disabled", &disabled) == 0 779 && disabled != 0) 780 device_disable(child); 781 } 782 783 int 784 fdc_attach(device_t dev) 785 { 786 struct fdc_data *fdc; 787 int i, error; 788 789 fdc = device_get_softc(dev); 790 error = fdc_alloc_resources(fdc); 791 if (error) { 792 device_printf(dev, "cannot re-aquire resources\n"); 793 return error; 794 } 795 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 796 INTR_TYPE_BIO, fdc_intr, fdc, &fdc->fdc_intr); 797 if (error) { 798 device_printf(dev, "cannot setup interrupt\n"); 799 return error; 800 } 801 fdc->fdcu = device_get_unit(dev); 802 fdc->flags |= FDC_ATTACHED; 803 804 if ((fdc->flags & FDC_NODMA) == 0) { 805 /* Acquire the DMA channel forever, The driver will do the rest */ 806 /* XXX should integrate with rman */ 807 isa_dma_acquire(fdc->dmachan); 808 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */); 809 } 810 fdc->state = DEVIDLE; 811 812 /* reset controller, turn motor off, clear fdout mirror reg */ 813 fdout_wr(fdc, ((fdc->fdout = 0))); 814 bufq_init(&fdc->head); 815 816 /* 817 * Probe and attach any children. We should probably detect 818 * devices from the BIOS unless overridden. 819 */ 820 for (i = resource_query_string(-1, "at", device_get_nameunit(dev)); 821 i != -1; 822 i = resource_query_string(i, "at", device_get_nameunit(dev))) 823 fdc_add_child(dev, resource_query_name(i), 824 resource_query_unit(i)); 825 826 return (bus_generic_attach(dev)); 827 } 828 829 int 830 fdc_print_child(device_t me, device_t child) 831 { 832 int retval = 0; 833 834 retval += bus_print_child_header(me, child); 835 retval += printf(" on %s drive %d\n", device_get_nameunit(me), 836 fdc_get_fdunit(child)); 837 838 return (retval); 839 } 840 841 static device_method_t fdc_methods[] = { 842 /* Device interface */ 843 DEVMETHOD(device_probe, fdc_probe), 844 DEVMETHOD(device_attach, fdc_attach), 845 DEVMETHOD(device_detach, bus_generic_detach), 846 DEVMETHOD(device_shutdown, bus_generic_shutdown), 847 DEVMETHOD(device_suspend, bus_generic_suspend), 848 DEVMETHOD(device_resume, bus_generic_resume), 849 850 /* Bus interface */ 851 DEVMETHOD(bus_print_child, fdc_print_child), 852 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 853 /* Our children never use any other bus interface methods. */ 854 855 { 0, 0 } 856 }; 857 858 static driver_t fdc_driver = { 859 "fdc", 860 fdc_methods, 861 sizeof(struct fdc_data) 862 }; 863 864 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 865 866 /******************************************************************/ 867 /* 868 * devices attached to the controller section. 869 */ 870 static int 871 fd_probe(device_t dev) 872 { 873 int i; 874 u_int fdt, st0, st3; 875 struct fd_data *fd; 876 struct fdc_data *fdc; 877 fdsu_t fdsu; 878 static int fd_fifo = 0; 879 880 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 881 fd = device_get_softc(dev); 882 fdc = device_get_softc(device_get_parent(dev)); 883 884 bzero(fd, sizeof *fd); 885 fd->dev = dev; 886 fd->fdc = fdc; 887 fd->fdsu = fdsu; 888 fd->fdu = device_get_unit(dev); 889 890 #ifdef __i386__ 891 /* look up what bios thinks we have */ 892 switch (fd->fdu) { 893 case 0: 894 if ((fdc->flags & FDC_ISPCMCIA)) 895 fdt = RTCFDT_144M; 896 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0) 897 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED; 898 else 899 fdt = (rtcin(RTC_FDISKETTE) & 0xf0); 900 break; 901 case 1: 902 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0); 903 break; 904 default: 905 fdt = RTCFDT_NONE; 906 break; 907 } 908 #else 909 fdt = RTCFDT_144M; /* XXX probably */ 910 #endif 911 912 /* is there a unit? */ 913 if (fdt == RTCFDT_NONE) 914 return (ENXIO); 915 916 /* select it */ 917 set_motor(fdc, fdsu, TURNON); 918 DELAY(1000000); /* 1 sec */ 919 920 /* XXX This doesn't work before the first set_motor() */ 921 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN 922 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 923 && enable_fifo(fdc) == 0) { 924 device_printf(device_get_parent(dev), 925 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 926 } 927 fd_fifo = 1; 928 929 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) 930 && (st3 & NE7_ST3_T0)) { 931 /* if at track 0, first seek inwards */ 932 /* seek some steps: */ 933 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0); 934 DELAY(300000); /* ...wait a moment... */ 935 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */ 936 } 937 938 /* If we're at track 0 first seek inwards. */ 939 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) { 940 /* Seek some steps... */ 941 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 942 /* ...wait a moment... */ 943 DELAY(300000); 944 /* make ctrlr happy: */ 945 fd_sense_int(fdc, 0, 0); 946 } 947 } 948 949 for (i = 0; i < 2; i++) { 950 /* 951 * we must recalibrate twice, just in case the 952 * heads have been beyond cylinder 76, since most 953 * FDCs still barf when attempting to recalibrate 954 * more than 77 steps 955 */ 956 /* go back to 0: */ 957 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 958 /* a second being enough for full stroke seek*/ 959 DELAY(i == 0 ? 1000000 : 300000); 960 961 /* anything responding? */ 962 if (fd_sense_int(fdc, &st0, 0) == 0 && 963 (st0 & NE7_ST0_EC) == 0) 964 break; /* already probed succesfully */ 965 } 966 } 967 968 set_motor(fdc, fdsu, TURNOFF); 969 970 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */ 971 return (ENXIO); 972 973 fd->track = FD_NO_TRACK; 974 fd->fdc = fdc; 975 fd->fdsu = fdsu; 976 fd->options = 0; 977 callout_handle_init(&fd->toffhandle); 978 callout_handle_init(&fd->tohandle); 979 980 switch (fdt) { 981 case RTCFDT_12M: 982 device_set_desc(dev, "1200-KB 5.25\" drive"); 983 fd->type = FD_1200; 984 break; 985 case RTCFDT_144M | RTCFDT_144M_PRETENDED: 986 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive"); 987 fdt = RTCFDT_144M; 988 fd->type = FD_1440; 989 case RTCFDT_144M: 990 device_set_desc(dev, "1440-KB 3.5\" drive"); 991 fd->type = FD_1440; 992 break; 993 case RTCFDT_288M: 994 case RTCFDT_288M_1: 995 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 996 fd->type = FD_1440; 997 break; 998 case RTCFDT_360K: 999 device_set_desc(dev, "360-KB 5.25\" drive"); 1000 fd->type = FD_360; 1001 break; 1002 case RTCFDT_720K: 1003 printf("720-KB 3.5\" drive"); 1004 fd->type = FD_720; 1005 break; 1006 default: 1007 return (ENXIO); 1008 } 1009 return (0); 1010 } 1011 1012 static int 1013 fd_attach(device_t dev) 1014 { 1015 struct fd_data *fd; 1016 #if 0 1017 int i; 1018 int mynor; 1019 int typemynor; 1020 int typesize; 1021 #endif 1022 1023 fd = device_get_softc(dev); 1024 1025 cdevsw_add(&fd_cdevsw, -1 << 6, fd->fdu << 6); 1026 make_dev(&fd_cdevsw, (fd->fdu << 6), 1027 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu); 1028 1029 #if 0 1030 /* Other make_dev() go here. */ 1031 #endif 1032 1033 /* 1034 * Export the drive to the devstat interface. 1035 */ 1036 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1037 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS, 1038 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1039 DEVSTAT_PRIORITY_FD); 1040 return (0); 1041 } 1042 1043 static int 1044 fd_detach(device_t dev) 1045 { 1046 struct fd_data *fd; 1047 1048 fd = device_get_softc(dev); 1049 untimeout(fd_turnoff, fd, fd->toffhandle); 1050 1051 return (0); 1052 } 1053 1054 static device_method_t fd_methods[] = { 1055 /* Device interface */ 1056 DEVMETHOD(device_probe, fd_probe), 1057 DEVMETHOD(device_attach, fd_attach), 1058 DEVMETHOD(device_detach, fd_detach), 1059 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1060 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1061 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1062 1063 { 0, 0 } 1064 }; 1065 1066 static driver_t fd_driver = { 1067 "fd", 1068 fd_methods, 1069 sizeof(struct fd_data) 1070 }; 1071 1072 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1073 1074 /****************************************************************************/ 1075 /* motor control stuff */ 1076 /* remember to not deselect the drive we're working on */ 1077 /****************************************************************************/ 1078 static void 1079 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1080 { 1081 int fdout = fdc->fdout; 1082 int needspecify = 0; 1083 1084 if(turnon) { 1085 fdout &= ~FDO_FDSEL; 1086 fdout |= (FDO_MOEN0 << fdsu) + fdsu; 1087 } else 1088 fdout &= ~(FDO_MOEN0 << fdsu); 1089 1090 if(!turnon 1091 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0) 1092 /* gonna turn off the last drive, put FDC to bed */ 1093 fdout &= ~ (FDO_FRST|FDO_FDMAEN); 1094 else { 1095 /* make sure controller is selected and specified */ 1096 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0) 1097 needspecify = 1; 1098 fdout |= (FDO_FRST|FDO_FDMAEN); 1099 } 1100 1101 fdout_wr(fdc, fdout); 1102 fdc->fdout = fdout; 1103 TRACE1("[0x%x->FDOUT]", fdout); 1104 1105 if (needspecify) { 1106 /* 1107 * XXX 1108 * special case: since we have just woken up the FDC 1109 * from its sleep, we silently assume the command will 1110 * be accepted, and do not test for a timeout 1111 */ 1112 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1113 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1114 0); 1115 if (fdc->flags & FDC_HAS_FIFO) 1116 (void) enable_fifo(fdc); 1117 } 1118 } 1119 1120 static void 1121 fd_turnoff(void *xfd) 1122 { 1123 int s; 1124 fd_p fd = xfd; 1125 1126 TRACE1("[fd%d: turnoff]", fd->fdu); 1127 1128 s = splbio(); 1129 /* 1130 * Don't turn off the motor yet if the drive is active. 1131 * 1132 * If we got here, this could only mean we missed an interrupt. 1133 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1134 * after a controller reset. Just schedule a pseudo-interrupt 1135 * so the state machine gets re-entered. 1136 */ 1137 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1138 fdc_intr(fd->fdc); 1139 splx(s); 1140 return; 1141 } 1142 1143 fd->flags &= ~FD_MOTOR; 1144 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1145 splx(s); 1146 } 1147 1148 static void 1149 fd_motor_on(void *xfd) 1150 { 1151 int s; 1152 fd_p fd = xfd; 1153 1154 s = splbio(); 1155 fd->flags &= ~FD_MOTOR_WAIT; 1156 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1157 { 1158 fdc_intr(fd->fdc); 1159 } 1160 splx(s); 1161 } 1162 1163 static void 1164 fd_turnon(fd_p fd) 1165 { 1166 if(!(fd->flags & FD_MOTOR)) 1167 { 1168 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1169 set_motor(fd->fdc, fd->fdsu, TURNON); 1170 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */ 1171 } 1172 } 1173 1174 static void 1175 fdc_reset(fdc_p fdc) 1176 { 1177 /* Try a reset, keep motor on */ 1178 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1179 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1180 DELAY(100); 1181 /* enable FDC, but defer interrupts a moment */ 1182 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1183 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1184 DELAY(100); 1185 fdout_wr(fdc, fdc->fdout); 1186 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1187 1188 /* XXX after a reset, silently believe the FDC will accept commands */ 1189 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1190 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1191 0); 1192 if (fdc->flags & FDC_HAS_FIFO) 1193 (void) enable_fifo(fdc); 1194 } 1195 1196 /****************************************************************************/ 1197 /* fdc in/out */ 1198 /****************************************************************************/ 1199 /* 1200 * FDC IO functions, take care of the main status register, timeout 1201 * in case the desired status bits are never set. 1202 * 1203 * These PIO loops initially start out with short delays between 1204 * each iteration in the expectation that the required condition 1205 * is usually met quickly, so it can be handled immediately. After 1206 * about 1 ms, stepping is increased to achieve a better timing 1207 * accuracy in the calls to DELAY(). 1208 */ 1209 static int 1210 fd_in(struct fdc_data *fdc, int *ptr) 1211 { 1212 int i, j, step; 1213 1214 for (j = 0, step = 1; 1215 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) && 1216 j < FDSTS_TIMEOUT; 1217 j += step) { 1218 if (i == NE7_RQM) 1219 return (fdc_err(fdc, "ready for output in input\n")); 1220 if (j == 1000) 1221 step = 1000; 1222 DELAY(step); 1223 } 1224 if (j >= FDSTS_TIMEOUT) 1225 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); 1226 #ifdef FDC_DEBUG 1227 i = fddata_rd(fdc); 1228 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1229 *ptr = i; 1230 return (0); 1231 #else /* !FDC_DEBUG */ 1232 i = fddata_rd(fdc); 1233 if (ptr) 1234 *ptr = i; 1235 return (0); 1236 #endif /* FDC_DEBUG */ 1237 } 1238 1239 static int 1240 out_fdc(struct fdc_data *fdc, int x) 1241 { 1242 int i, j, step; 1243 1244 for (j = 0, step = 1; 1245 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM && 1246 j < FDSTS_TIMEOUT; 1247 j += step) { 1248 if (i == (NE7_DIO|NE7_RQM)) 1249 return (fdc_err(fdc, "ready for input in output\n")); 1250 if (j == 1000) 1251 step = 1000; 1252 DELAY(step); 1253 } 1254 if (j >= FDSTS_TIMEOUT) 1255 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); 1256 1257 /* Send the command and return */ 1258 fddata_wr(fdc, x); 1259 TRACE1("[0x%x->FDDATA]", x); 1260 return (0); 1261 } 1262 1263 /****************************************************************************/ 1264 /* fdopen/fdclose */ 1265 /****************************************************************************/ 1266 int 1267 Fdopen(dev_t dev, int flags, int mode, struct thread *td) 1268 { 1269 fdu_t fdu = FDUNIT(minor(dev)); 1270 int type = FDTYPE(minor(dev)); 1271 fd_p fd; 1272 fdc_p fdc; 1273 1274 /* check bounds */ 1275 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1276 return (ENXIO); 1277 fdc = fd->fdc; 1278 if ((fdc == NULL) || (fd->type == NO_TYPE)) 1279 return (ENXIO); 1280 if (type > NUMDENS) 1281 return (ENXIO); 1282 if (type == 0) 1283 type = fd->type; 1284 else { 1285 /* 1286 * For each type of basic drive, make sure we are trying 1287 * to open a type it can do, 1288 */ 1289 if (type != fd->type) { 1290 switch (fd->type) { 1291 case FD_360: 1292 return (ENXIO); 1293 case FD_720: 1294 if ( type != FD_820 1295 && type != FD_800 1296 && type != FD_640 1297 ) 1298 return (ENXIO); 1299 break; 1300 case FD_1200: 1301 switch (type) { 1302 case FD_1480: 1303 type = FD_1480in5_25; 1304 break; 1305 case FD_1440: 1306 type = FD_1440in5_25; 1307 break; 1308 case FD_1232: 1309 break; 1310 case FD_820: 1311 type = FD_820in5_25; 1312 break; 1313 case FD_800: 1314 type = FD_800in5_25; 1315 break; 1316 case FD_720: 1317 type = FD_720in5_25; 1318 break; 1319 case FD_640: 1320 type = FD_640in5_25; 1321 break; 1322 case FD_360: 1323 type = FD_360in5_25; 1324 break; 1325 default: 1326 return(ENXIO); 1327 } 1328 break; 1329 case FD_1440: 1330 if ( type != FD_1720 1331 && type != FD_1480 1332 && type != FD_1200 1333 && type != FD_820 1334 && type != FD_800 1335 && type != FD_720 1336 && type != FD_640 1337 ) 1338 return(ENXIO); 1339 break; 1340 } 1341 } 1342 } 1343 fd->ft = fd_types + type - 1; 1344 fd->flags |= FD_OPEN; 1345 /* 1346 * Clearing the DMA overrun counter at open time is a bit messy. 1347 * Since we're only managing one counter per controller, opening 1348 * the second drive could mess it up. Anyway, if the DMA overrun 1349 * condition is really persistent, it will eventually time out 1350 * still. OTOH, clearing it here will ensure we'll at least start 1351 * trying again after a previous (maybe even long ago) failure. 1352 * Also, this is merely a stop-gap measure only that should not 1353 * happen during normal operation, so we can tolerate it to be a 1354 * bit sloppy about this. 1355 */ 1356 fdc->dma_overruns = 0; 1357 1358 return 0; 1359 } 1360 1361 int 1362 fdclose(dev_t dev, int flags, int mode, struct thread *td) 1363 { 1364 fdu_t fdu = FDUNIT(minor(dev)); 1365 struct fd_data *fd; 1366 1367 fd = devclass_get_softc(fd_devclass, fdu); 1368 fd->flags &= ~FD_OPEN; 1369 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG); 1370 1371 return (0); 1372 } 1373 1374 /****************************************************************************/ 1375 /* fdstrategy */ 1376 /****************************************************************************/ 1377 void 1378 fdstrategy(struct buf *bp) 1379 { 1380 unsigned nblocks, blknum, cando; 1381 int s; 1382 fdu_t fdu; 1383 fdc_p fdc; 1384 fd_p fd; 1385 size_t fdblk; 1386 1387 fdu = FDUNIT(minor(bp->b_dev)); 1388 fd = devclass_get_softc(fd_devclass, fdu); 1389 if (fd == 0) 1390 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1391 (u_long)major(bp->b_dev), (u_long)minor(bp->b_dev)); 1392 fdc = fd->fdc; 1393 if (fd->type == NO_TYPE) { 1394 bp->b_error = ENXIO; 1395 bp->b_flags |= B_ERROR; 1396 goto bad; 1397 }; 1398 1399 fdblk = 128 << (fd->ft->secsize); 1400 if (!(bp->b_flags & B_FORMAT)) { 1401 if (bp->b_blkno < 0) { 1402 printf( 1403 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n", 1404 fdu, (u_long)bp->b_blkno, bp->b_bcount); 1405 bp->b_error = EINVAL; 1406 bp->b_flags |= B_ERROR; 1407 goto bad; 1408 } 1409 if ((bp->b_bcount % fdblk) != 0) { 1410 bp->b_error = EINVAL; 1411 bp->b_flags |= B_ERROR; 1412 goto bad; 1413 } 1414 } 1415 1416 /* 1417 * Set up block calculations. 1418 */ 1419 if (bp->b_blkno > 20000000) { 1420 /* 1421 * Reject unreasonably high block number, prevent the 1422 * multiplication below from overflowing. 1423 */ 1424 bp->b_error = EINVAL; 1425 bp->b_flags |= B_ERROR; 1426 goto bad; 1427 } 1428 blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk; 1429 nblocks = fd->ft->size; 1430 bp->b_resid = 0; 1431 if (blknum + (bp->b_bcount / fdblk) > nblocks) { 1432 if (blknum <= nblocks) { 1433 cando = (nblocks - blknum) * fdblk; 1434 bp->b_resid = bp->b_bcount - cando; 1435 if (cando == 0) 1436 goto bad; /* not actually bad but EOF */ 1437 } else { 1438 bp->b_error = EINVAL; 1439 bp->b_flags |= B_ERROR; 1440 goto bad; 1441 } 1442 } 1443 bp->b_pblkno = bp->b_blkno; 1444 s = splbio(); 1445 bufqdisksort(&fdc->head, bp); 1446 untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */ 1447 1448 /* Tell devstat we are starting on the transaction */ 1449 devstat_start_transaction(&fd->device_stats); 1450 device_busy(fd->dev); 1451 1452 fdstart(fdc); 1453 splx(s); 1454 return; 1455 1456 bad: 1457 biodone(bp); 1458 } 1459 1460 /***************************************************************\ 1461 * fdstart * 1462 * We have just queued something.. if the controller is not busy * 1463 * then simulate the case where it has just finished a command * 1464 * So that it (the interrupt routine) looks on the queue for more* 1465 * work to do and picks up what we just added. * 1466 * If the controller is already busy, we need do nothing, as it * 1467 * will pick up our work when the present work completes * 1468 \***************************************************************/ 1469 static void 1470 fdstart(struct fdc_data *fdc) 1471 { 1472 int s; 1473 1474 s = splbio(); 1475 if(fdc->state == DEVIDLE) 1476 { 1477 fdc_intr(fdc); 1478 } 1479 splx(s); 1480 } 1481 1482 static void 1483 fd_iotimeout(void *xfdc) 1484 { 1485 fdc_p fdc; 1486 int s; 1487 1488 fdc = xfdc; 1489 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1490 1491 /* 1492 * Due to IBM's brain-dead design, the FDC has a faked ready 1493 * signal, hardwired to ready == true. Thus, any command 1494 * issued if there's no diskette in the drive will _never_ 1495 * complete, and must be aborted by resetting the FDC. 1496 * Many thanks, Big Blue! 1497 * The FDC must not be reset directly, since that would 1498 * interfere with the state machine. Instead, pretend that 1499 * the command completed but was invalid. The state machine 1500 * will reset the FDC and retry once. 1501 */ 1502 s = splbio(); 1503 fdc->status[0] = NE7_ST0_IC_IV; 1504 fdc->flags &= ~FDC_STAT_VALID; 1505 fdc->state = IOTIMEDOUT; 1506 fdc_intr(fdc); 1507 splx(s); 1508 } 1509 1510 /* just ensure it has the right spl */ 1511 static void 1512 fd_pseudointr(void *xfdc) 1513 { 1514 int s; 1515 1516 s = splbio(); 1517 fdc_intr(xfdc); 1518 splx(s); 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 untimeout(fd_turnoff, fd, fd->toffhandle); 1626 fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz); 1627 switch (fdc->state) 1628 { 1629 case DEVIDLE: 1630 case FINDWORK: /* we have found new work */ 1631 fdc->retry = 0; 1632 fd->skip = 0; 1633 fdc->fd = fd; 1634 fdc->fdu = fdu; 1635 fdc->fdctl_wr(fdc, fd->ft->trans); 1636 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 1637 /*******************************************************\ 1638 * If the next drive has a motor startup pending, then * 1639 * it will start up in its own good time * 1640 \*******************************************************/ 1641 if(fd->flags & FD_MOTOR_WAIT) { 1642 fdc->state = MOTORWAIT; 1643 return (0); /* come back later */ 1644 } 1645 /*******************************************************\ 1646 * Maybe if it's not starting, it SHOULD be starting * 1647 \*******************************************************/ 1648 if (!(fd->flags & FD_MOTOR)) 1649 { 1650 fdc->state = MOTORWAIT; 1651 fd_turnon(fd); 1652 return (0); 1653 } 1654 else /* at least make sure we are selected */ 1655 { 1656 set_motor(fdc, fd->fdsu, TURNON); 1657 } 1658 if (fdc->flags & FDC_NEEDS_RESET) { 1659 fdc->state = RESETCTLR; 1660 fdc->flags &= ~FDC_NEEDS_RESET; 1661 } else 1662 fdc->state = DOSEEK; 1663 break; 1664 case DOSEEK: 1665 if (b_cylinder == (unsigned)fd->track) 1666 { 1667 fdc->state = SEEKCOMPLETE; 1668 break; 1669 } 1670 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 1671 fd->fdsu, b_cylinder * fd->ft->steptrac, 1672 0)) 1673 { 1674 /* 1675 * seek command not accepted, looks like 1676 * the FDC went off to the Saints... 1677 */ 1678 fdc->retry = 6; /* try a reset */ 1679 return(retrier(fdc)); 1680 } 1681 fd->track = FD_NO_TRACK; 1682 fdc->state = SEEKWAIT; 1683 return(0); /* will return later */ 1684 case SEEKWAIT: 1685 /* allow heads to settle */ 1686 timeout(fd_pseudointr, fdc, hz / 16); 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 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 1882 return(0); /* will return later */ 1883 }; 1884 1885 /* 1886 * write (or format) operation will fall through and 1887 * await completion interrupt 1888 */ 1889 fdc->state = IOCOMPLETE; 1890 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 1891 return (0); /* will return later */ 1892 case PIOREAD: 1893 /* 1894 * actually perform the PIO read. The IOCOMPLETE case 1895 * removes the timeout for us. 1896 */ 1897 (void)fdcpio(fdc,bp->b_flags,bp->b_data+fd->skip,fdblk); 1898 fdc->state = IOCOMPLETE; 1899 /* FALLTHROUGH */ 1900 case IOCOMPLETE: /* IO DONE, post-analyze */ 1901 untimeout(fd_iotimeout, fdc, fd->tohandle); 1902 1903 if (fd_read_status(fdc, fd->fdsu)) { 1904 if (!(fdc->flags & FDC_NODMA)) 1905 isa_dmadone(bp->b_flags, bp->b_data + fd->skip, 1906 format ? bp->b_bcount : fdblk, 1907 fdc->dmachan); 1908 if (fdc->retry < 6) 1909 fdc->retry = 6; /* force a reset */ 1910 return (retrier(fdc)); 1911 } 1912 1913 fdc->state = IOTIMEDOUT; 1914 1915 /* FALLTHROUGH */ 1916 1917 case IOTIMEDOUT: 1918 if (!(fdc->flags & FDC_NODMA)) 1919 isa_dmadone(bp->b_flags, bp->b_data + fd->skip, 1920 format ? bp->b_bcount : fdblk, fdc->dmachan); 1921 if (fdc->status[0] & NE7_ST0_IC) { 1922 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1923 && fdc->status[1] & NE7_ST1_OR) { 1924 /* 1925 * DMA overrun. Someone hogged the bus and 1926 * didn't release it in time for the next 1927 * FDC transfer. 1928 * 1929 * We normally restart this without bumping 1930 * the retry counter. However, in case 1931 * something is seriously messed up (like 1932 * broken hardware), we rather limit the 1933 * number of retries so the IO operation 1934 * doesn't block indefinately. 1935 */ 1936 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 1937 fdc->state = SEEKCOMPLETE; 1938 return (1); 1939 } /* else fall through */ 1940 } 1941 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 1942 && fdc->retry < 6) 1943 fdc->retry = 6; /* force a reset */ 1944 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1945 && fdc->status[2] & NE7_ST2_WC 1946 && fdc->retry < 3) 1947 fdc->retry = 3; /* force recalibrate */ 1948 return (retrier(fdc)); 1949 } 1950 /* All OK */ 1951 /* Operation successful, retry DMA overruns again next time. */ 1952 fdc->dma_overruns = 0; 1953 fd->skip += fdblk; 1954 if (!format && fd->skip < bp->b_bcount - bp->b_resid) { 1955 /* set up next transfer */ 1956 fdc->state = DOSEEK; 1957 } else { 1958 /* ALL DONE */ 1959 fd->skip = 0; 1960 fdc->bp = NULL; 1961 device_unbusy(fd->dev); 1962 devstat_end_transaction_buf(&fd->device_stats, bp); 1963 biodone(bp); 1964 fdc->fd = (fd_p) 0; 1965 fdc->fdu = -1; 1966 fdc->state = FINDWORK; 1967 } 1968 return (1); 1969 case RESETCTLR: 1970 fdc_reset(fdc); 1971 fdc->retry++; 1972 fdc->state = RESETCOMPLETE; 1973 return (0); 1974 case RESETCOMPLETE: 1975 /* 1976 * Discard all the results from the reset so that they 1977 * can't cause an unexpected interrupt later. 1978 */ 1979 for (i = 0; i < 4; i++) 1980 (void)fd_sense_int(fdc, &st0, &cyl); 1981 fdc->state = STARTRECAL; 1982 /* Fall through. */ 1983 case STARTRECAL: 1984 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 1985 /* arrgl */ 1986 fdc->retry = 6; 1987 return (retrier(fdc)); 1988 } 1989 fdc->state = RECALWAIT; 1990 return (0); /* will return later */ 1991 case RECALWAIT: 1992 /* allow heads to settle */ 1993 timeout(fd_pseudointr, fdc, hz / 8); 1994 fdc->state = RECALCOMPLETE; 1995 return (0); /* will return later */ 1996 case RECALCOMPLETE: 1997 do { 1998 /* 1999 * See SEEKCOMPLETE for a comment on this: 2000 */ 2001 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2002 return 0; 2003 if(fdc->fdct == FDC_NE765 2004 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2005 return 0; /* hope for a real intr */ 2006 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2007 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2008 { 2009 if(fdc->retry > 3) 2010 /* 2011 * a recalibrate from beyond cylinder 77 2012 * will "fail" due to the FDC limitations; 2013 * since people used to complain much about 2014 * the failure message, try not logging 2015 * this one if it seems to be the first 2016 * time in a line 2017 */ 2018 printf("fd%d: recal failed ST0 %b cyl %d\n", 2019 fdu, st0, NE7_ST0BITS, cyl); 2020 if(fdc->retry < 3) fdc->retry = 3; 2021 return (retrier(fdc)); 2022 } 2023 fd->track = 0; 2024 /* Seek (probably) necessary */ 2025 fdc->state = DOSEEK; 2026 return (1); /* will return immediatly */ 2027 case MOTORWAIT: 2028 if(fd->flags & FD_MOTOR_WAIT) 2029 { 2030 return (0); /* time's not up yet */ 2031 } 2032 if (fdc->flags & FDC_NEEDS_RESET) { 2033 fdc->state = RESETCTLR; 2034 fdc->flags &= ~FDC_NEEDS_RESET; 2035 } else { 2036 /* 2037 * If all motors were off, then the controller was 2038 * reset, so it has lost track of the current 2039 * cylinder. Recalibrate to handle this case. 2040 * But first, discard the results of the reset. 2041 */ 2042 fdc->state = RESETCOMPLETE; 2043 } 2044 return (1); /* will return immediatly */ 2045 default: 2046 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2047 if (fd_read_status(fdc, fd->fdsu) == 0) 2048 printf("FDC status :%x %x %x %x %x %x %x ", 2049 fdc->status[0], 2050 fdc->status[1], 2051 fdc->status[2], 2052 fdc->status[3], 2053 fdc->status[4], 2054 fdc->status[5], 2055 fdc->status[6] ); 2056 else 2057 printf("No status available "); 2058 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2059 { 2060 printf("[controller is dead now]\n"); 2061 return (0); 2062 } 2063 printf("ST0 = %x, PCN = %x\n", st0, cyl); 2064 return (0); 2065 } 2066 /*XXX confusing: some branches return immediately, others end up here*/ 2067 return (1); /* Come back immediatly to new state */ 2068 } 2069 2070 static int 2071 retrier(struct fdc_data *fdc) 2072 { 2073 struct buf *bp; 2074 struct fd_data *fd; 2075 int fdu; 2076 2077 bp = fdc->bp; 2078 2079 /* XXX shouldn't this be cached somewhere? */ 2080 fdu = FDUNIT(minor(bp->b_dev)); 2081 fd = devclass_get_softc(fd_devclass, fdu); 2082 if (fd->options & FDOPT_NORETRY) 2083 goto fail; 2084 2085 switch (fdc->retry) { 2086 case 0: case 1: case 2: 2087 fdc->state = SEEKCOMPLETE; 2088 break; 2089 case 3: case 4: case 5: 2090 fdc->state = STARTRECAL; 2091 break; 2092 case 6: 2093 fdc->state = RESETCTLR; 2094 break; 2095 case 7: 2096 break; 2097 default: 2098 fail: 2099 { 2100 int printerror = (fd->options & FDOPT_NOERRLOG) == 0; 2101 2102 if (printerror) { 2103 /* 2104 * note: use the correct device for more 2105 * verbose error reporting. 2106 */ 2107 dev_t subdev; 2108 2109 subdev = make_sub_dev(bp->b_dev, 2110 (FDUNIT(minor(bp->b_dev))<<3)|RAW_PART); 2111 diskerr(bp, subdev, 2112 "hard error", LOG_PRINTF, 2113 fdc->fd->skip / DEV_BSIZE, 2114 (struct disklabel *)NULL); 2115 } 2116 if (printerror) { 2117 if (fdc->flags & FDC_STAT_VALID) 2118 printf( 2119 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2120 fdc->status[0], NE7_ST0BITS, 2121 fdc->status[1], NE7_ST1BITS, 2122 fdc->status[2], NE7_ST2BITS, 2123 fdc->status[3], fdc->status[4], 2124 fdc->status[5]); 2125 else 2126 printf(" (No status)\n"); 2127 } 2128 } 2129 bp->b_flags |= B_ERROR; 2130 bp->b_error = EIO; 2131 bp->b_resid += bp->b_bcount - fdc->fd->skip; 2132 fdc->bp = NULL; 2133 fdc->fd->skip = 0; 2134 device_unbusy(fd->dev); 2135 devstat_end_transaction_buf(&fdc->fd->device_stats, bp); 2136 biodone(bp); 2137 fdc->state = FINDWORK; 2138 fdc->flags |= FDC_NEEDS_RESET; 2139 fdc->fd = (fd_p) 0; 2140 fdc->fdu = -1; 2141 return (1); 2142 } 2143 fdc->retry++; 2144 return (1); 2145 } 2146 2147 static int 2148 fdformat(dev_t dev, struct fd_formb *finfo, struct thread *td) 2149 { 2150 struct proc *p = td->td_proc; 2151 fdu_t fdu; 2152 fd_p fd; 2153 2154 struct buf *bp; 2155 int rv = 0, s; 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 PHOLD(p); 2169 BUF_LOCKINIT(bp); 2170 BUF_LOCK(bp, LK_EXCLUSIVE); 2171 bp->b_flags = B_PHYS | B_FORMAT; 2172 2173 /* 2174 * calculate a fake blkno, so fdstrategy() would initiate a 2175 * seek to the requested cylinder 2176 */ 2177 bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads) 2178 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE; 2179 2180 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; 2181 bp->b_data = (caddr_t)finfo; 2182 2183 /* now do the format */ 2184 bp->b_dev = dev; 2185 BUF_STRATEGY(bp, 0); 2186 2187 /* ...and wait for it to complete */ 2188 s = splbio(); 2189 while(!(bp->b_flags & B_DONE)) { 2190 rv = tsleep((caddr_t)bp, 0, "fdform", 20 * hz); 2191 if (rv == EWOULDBLOCK) 2192 break; 2193 } 2194 splx(s); 2195 2196 if (rv == EWOULDBLOCK) { 2197 /* timed out */ 2198 rv = EIO; 2199 device_unbusy(fd->dev); 2200 biodone(bp); 2201 } 2202 if (bp->b_flags & B_ERROR) 2203 rv = bp->b_error; 2204 /* 2205 * allow the process to be swapped 2206 */ 2207 PRELE(p); 2208 BUF_UNLOCK(bp); 2209 BUF_LOCKFREE(bp); 2210 free(bp, M_TEMP); 2211 return rv; 2212 } 2213 2214 /* 2215 * TODO: don't allocate buffer on stack. 2216 */ 2217 2218 static int 2219 fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 2220 { 2221 fdu_t fdu = FDUNIT(minor(dev)); 2222 fd_p fd = devclass_get_softc(fd_devclass, fdu); 2223 size_t fdblk; 2224 2225 struct fd_type *fdt; 2226 struct disklabel *dl; 2227 struct fdc_status *fsp; 2228 char buffer[DEV_BSIZE]; 2229 int error = 0; 2230 2231 fdblk = 128 << fd->ft->secsize; 2232 2233 switch (cmd) { 2234 case DIOCGDINFO: 2235 bzero(buffer, sizeof (buffer)); 2236 dl = (struct disklabel *)buffer; 2237 dl->d_secsize = fdblk; 2238 fdt = fd->ft; 2239 dl->d_secpercyl = fdt->size / fdt->tracks; 2240 dl->d_type = DTYPE_FLOPPY; 2241 2242 if (readdisklabel(dev, dl) 2243 == NULL) 2244 error = 0; 2245 else 2246 error = EINVAL; 2247 2248 *(struct disklabel *)addr = *dl; 2249 break; 2250 2251 case DIOCSDINFO: 2252 if ((flag & FWRITE) == 0) 2253 error = EBADF; 2254 break; 2255 2256 case DIOCWLABEL: 2257 if ((flag & FWRITE) == 0) 2258 error = EBADF; 2259 break; 2260 2261 case DIOCWDINFO: 2262 if ((flag & FWRITE) == 0) { 2263 error = EBADF; 2264 break; 2265 } 2266 2267 dl = (struct disklabel *)addr; 2268 2269 if ((error = setdisklabel((struct disklabel *)buffer, dl, 2270 (u_long)0)) != 0) 2271 break; 2272 2273 error = writedisklabel(dev, (struct disklabel *)buffer); 2274 break; 2275 case FD_FORM: 2276 if ((flag & FWRITE) == 0) 2277 error = EBADF; /* must be opened for writing */ 2278 else if (((struct fd_formb *)addr)->format_version != 2279 FD_FORMAT_VERSION) 2280 error = EINVAL; /* wrong version of formatting prog */ 2281 else 2282 error = fdformat(dev, (struct fd_formb *)addr, td); 2283 break; 2284 2285 case FD_GTYPE: /* get drive type */ 2286 *(struct fd_type *)addr = *fd->ft; 2287 break; 2288 2289 case FD_STYPE: /* set drive type */ 2290 /* this is considered harmful; only allow for superuser */ 2291 if (suser(td) != 0) 2292 return EPERM; 2293 *fd->ft = *(struct fd_type *)addr; 2294 break; 2295 2296 case FD_GOPTS: /* get drive options */ 2297 *(int *)addr = fd->options; 2298 break; 2299 2300 case FD_SOPTS: /* set drive options */ 2301 fd->options = *(int *)addr; 2302 break; 2303 2304 case FD_GSTAT: 2305 fsp = (struct fdc_status *)addr; 2306 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2307 return EINVAL; 2308 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2309 break; 2310 2311 default: 2312 error = ENOTTY; 2313 break; 2314 } 2315 return (error); 2316 } 2317 2318 /* 2319 * Hello emacs, these are the 2320 * Local Variables: 2321 * c-indent-level: 8 2322 * c-continued-statement-offset: 8 2323 * c-continued-brace-offset: 0 2324 * c-brace-offset: -8 2325 * c-brace-imaginary-offset: 0 2326 * c-argdecl-indent: 8 2327 * c-label-offset: -8 2328 * c++-hanging-braces: 1 2329 * c++-access-specifier-offset: -8 2330 * c++-empty-arglist-indent: 8 2331 * c++-friend-offset: 0 2332 * End: 2333 */ 2334