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 1.10 2003/08/07 21:16:52 dillon Exp $ 55 * 56 */ 57 58 #include "opt_fdc.h" 59 #include "use_card.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 static 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 static 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 NCARD > 0 319 static void 320 fdctl_wr_pcmcia(fdc_p fdc, u_int8_t v) 321 { 322 bus_space_write_1(fdc->portt, fdc->porth, FDCTL+fdc->port_off, v); 323 } 324 #endif 325 326 #if 0 327 328 static u_int8_t 329 fdin_rd(fdc_p fdc) 330 { 331 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 332 } 333 334 #endif 335 336 static d_open_t Fdopen; /* NOTE, not fdopen */ 337 static d_close_t fdclose; 338 static d_ioctl_t fdioctl; 339 static d_strategy_t fdstrategy; 340 341 static struct cdevsw fd_cdevsw = { 342 /* name */ "fd", 343 /* maj */ FD_CDEV_MAJOR, 344 /* flags */ D_DISK, 345 /* port */ NULL, 346 /* autoq */ 0, 347 348 /* open */ Fdopen, 349 /* close */ fdclose, 350 /* read */ physread, 351 /* write */ physwrite, 352 /* ioctl */ fdioctl, 353 /* poll */ nopoll, 354 /* mmap */ nommap, 355 /* strategy */ fdstrategy, 356 /* dump */ nodump, 357 /* psize */ nopsize 358 }; 359 360 static int 361 fdc_err(struct fdc_data *fdc, const char *s) 362 { 363 fdc->fdc_errs++; 364 if (s) { 365 if (fdc->fdc_errs < FDC_ERRMAX) 366 device_printf(fdc->fdc_dev, "%s", s); 367 else if (fdc->fdc_errs == FDC_ERRMAX) 368 device_printf(fdc->fdc_dev, "too many errors, not " 369 "logging any more\n"); 370 } 371 372 return FD_FAILED; 373 } 374 375 /* 376 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 377 * Unit number, 378 * # of output bytes, output bytes as ints ..., 379 * # of input bytes, input bytes as ints ... 380 */ 381 static int 382 fd_cmd(struct fdc_data *fdc, int n_out, ...) 383 { 384 u_char cmd; 385 int n_in; 386 int n; 387 va_list ap; 388 389 va_start(ap, n_out); 390 cmd = (u_char)(va_arg(ap, int)); 391 va_end(ap); 392 va_start(ap, n_out); 393 for (n = 0; n < n_out; n++) 394 { 395 if (out_fdc(fdc, va_arg(ap, int)) < 0) 396 { 397 char msg[50]; 398 snprintf(msg, sizeof(msg), 399 "cmd %x failed at out byte %d of %d\n", 400 cmd, n + 1, n_out); 401 return fdc_err(fdc, msg); 402 } 403 } 404 n_in = va_arg(ap, int); 405 for (n = 0; n < n_in; n++) 406 { 407 int *ptr = va_arg(ap, int *); 408 if (fd_in(fdc, ptr) < 0) 409 { 410 char msg[50]; 411 snprintf(msg, sizeof(msg), 412 "cmd %02x failed at in byte %d of %d\n", 413 cmd, n + 1, n_in); 414 return fdc_err(fdc, msg); 415 } 416 } 417 418 return 0; 419 } 420 421 static int 422 enable_fifo(fdc_p fdc) 423 { 424 int i, j; 425 426 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 427 428 /* 429 * XXX: 430 * Cannot use fd_cmd the normal way here, since 431 * this might be an invalid command. Thus we send the 432 * first byte, and check for an early turn of data directon. 433 */ 434 435 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 436 return fdc_err(fdc, "Enable FIFO failed\n"); 437 438 /* If command is invalid, return */ 439 j = FDSTS_TIMEOUT; 440 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 441 != NE7_RQM && j-- > 0) { 442 if (i == (NE7_DIO | NE7_RQM)) { 443 fdc_reset(fdc); 444 return FD_FAILED; 445 } 446 DELAY(1); 447 } 448 if (j<0 || 449 fd_cmd(fdc, 3, 450 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 451 fdc_reset(fdc); 452 return fdc_err(fdc, "Enable FIFO failed\n"); 453 } 454 fdc->flags |= FDC_HAS_FIFO; 455 return 0; 456 } 457 if (fd_cmd(fdc, 4, 458 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 459 return fdc_err(fdc, "Re-enable FIFO failed\n"); 460 return 0; 461 } 462 463 static int 464 fd_sense_drive_status(fdc_p fdc, int *st3p) 465 { 466 int st3; 467 468 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 469 { 470 return fdc_err(fdc, "Sense Drive Status failed\n"); 471 } 472 if (st3p) 473 *st3p = st3; 474 475 return 0; 476 } 477 478 static int 479 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 480 { 481 int cyl, st0, ret; 482 483 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 484 if (ret) { 485 (void)fdc_err(fdc, 486 "sense intr err reading stat reg 0\n"); 487 return ret; 488 } 489 490 if (st0p) 491 *st0p = st0; 492 493 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 494 /* 495 * There doesn't seem to have been an interrupt. 496 */ 497 return FD_NOT_VALID; 498 } 499 500 if (fd_in(fdc, &cyl) < 0) { 501 return fdc_err(fdc, "can't get cyl num\n"); 502 } 503 504 if (cylp) 505 *cylp = cyl; 506 507 return 0; 508 } 509 510 511 static int 512 fd_read_status(fdc_p fdc, int fdsu) 513 { 514 int i, ret; 515 516 for (i = 0; i < 7; i++) { 517 /* 518 * XXX types are poorly chosen. Only bytes can by read 519 * from the hardware, but fdc->status[] wants u_ints and 520 * fd_in() gives ints. 521 */ 522 int status; 523 524 ret = fd_in(fdc, &status); 525 fdc->status[i] = status; 526 if (ret != 0) 527 break; 528 } 529 530 if (ret == 0) 531 fdc->flags |= FDC_STAT_VALID; 532 else 533 fdc->flags &= ~FDC_STAT_VALID; 534 535 return ret; 536 } 537 538 /****************************************************************************/ 539 /* autoconfiguration stuff */ 540 /****************************************************************************/ 541 542 static int 543 fdc_alloc_resources(struct fdc_data *fdc) 544 { 545 device_t dev; 546 int ispnp, ispcmcia; 547 548 dev = fdc->fdc_dev; 549 ispnp = (fdc->flags & FDC_ISPNP) != 0; 550 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 551 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 552 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 553 554 /* 555 * On standard ISA, we don't just use an 8 port range 556 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 557 * register at 0x3f6. 558 * 559 * Isn't PC hardware wonderful. 560 * 561 * The Y-E Data PCMCIA FDC doesn't have this problem, it 562 * uses the register with offset 6 for pseudo-DMA, and the 563 * one with offset 7 as control register. 564 */ 565 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 566 &fdc->rid_ioport, 0ul, ~0ul, 567 ispcmcia ? 8 : (ispnp ? 1 : 6), 568 RF_ACTIVE); 569 if (fdc->res_ioport == 0) { 570 device_printf(dev, "cannot reserve I/O port range\n"); 571 return ENXIO; 572 } 573 fdc->portt = rman_get_bustag(fdc->res_ioport); 574 fdc->porth = rman_get_bushandle(fdc->res_ioport); 575 576 if (!ispcmcia) { 577 /* 578 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 579 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 580 * by checking the size and adjust the port address 581 * accordingly. 582 */ 583 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 584 fdc->port_off = -2; 585 586 /* 587 * Register the control port range as rid 1 if it 588 * isn't there already. Most PnP BIOSen will have 589 * already done this but non-PnP configurations don't. 590 * 591 * And some (!!) report 0x3f2-0x3f5 and completely 592 * leave out the control register! It seems that some 593 * non-antique controller chips have a different 594 * method of programming the transfer speed which 595 * doesn't require the control register, but it's 596 * mighty bogus as the chip still responds to the 597 * address for the control register. 598 */ 599 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 600 u_long ctlstart; 601 602 /* Find the control port, usually 0x3f7 */ 603 ctlstart = rman_get_start(fdc->res_ioport) + 604 fdc->port_off + 7; 605 606 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); 607 } 608 609 /* 610 * Now (finally!) allocate the control port. 611 */ 612 fdc->rid_ctl = 1; 613 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 614 &fdc->rid_ctl, 615 0ul, ~0ul, 1, RF_ACTIVE); 616 if (fdc->res_ctl == 0) { 617 device_printf(dev, 618 "cannot reserve control I/O port range\n"); 619 return ENXIO; 620 } 621 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 622 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 623 } 624 625 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 626 &fdc->rid_irq, 0ul, ~0ul, 1, 627 RF_ACTIVE); 628 if (fdc->res_irq == 0) { 629 device_printf(dev, "cannot reserve interrupt line\n"); 630 return ENXIO; 631 } 632 633 if ((fdc->flags & FDC_NODMA) == 0) { 634 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 635 &fdc->rid_drq, 0ul, ~0ul, 1, 636 RF_ACTIVE); 637 if (fdc->res_drq == 0) { 638 device_printf(dev, "cannot reserve DMA request line\n"); 639 return ENXIO; 640 } 641 fdc->dmachan = fdc->res_drq->r_start; 642 } 643 644 return 0; 645 } 646 647 static void 648 fdc_release_resources(struct fdc_data *fdc) 649 { 650 device_t dev; 651 652 dev = fdc->fdc_dev; 653 if (fdc->res_irq != 0) { 654 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 655 fdc->res_irq); 656 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 657 fdc->res_irq); 658 } 659 if (fdc->res_ctl != 0) { 660 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 661 fdc->res_ctl); 662 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 663 fdc->res_ctl); 664 } 665 if (fdc->res_ioport != 0) { 666 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 667 fdc->res_ioport); 668 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 669 fdc->res_ioport); 670 } 671 if (fdc->res_drq != 0) { 672 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 673 fdc->res_drq); 674 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 675 fdc->res_drq); 676 } 677 } 678 679 /****************************************************************************/ 680 /* autoconfiguration stuff */ 681 /****************************************************************************/ 682 683 static struct isa_pnp_id fdc_ids[] = { 684 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 685 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 686 {0} 687 }; 688 689 static int 690 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result) 691 { 692 struct fdc_ivars *ivars = device_get_ivars(child); 693 694 switch (which) { 695 case FDC_IVAR_FDUNIT: 696 *result = ivars->fdunit; 697 break; 698 default: 699 return ENOENT; 700 } 701 return 0; 702 } 703 704 /* 705 * fdc controller section. 706 */ 707 static int 708 fdc_probe(device_t dev) 709 { 710 int error, ic_type; 711 struct fdc_data *fdc; 712 713 fdc = device_get_softc(dev); 714 bzero(fdc, sizeof *fdc); 715 fdc->fdc_dev = dev; 716 fdc->fdctl_wr = fdctl_wr_isa; 717 718 /* Check pnp ids */ 719 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 720 if (error == ENXIO) 721 return ENXIO; 722 if (error == 0) 723 fdc->flags |= FDC_ISPNP; 724 725 /* Attempt to allocate our resources for the duration of the probe */ 726 error = fdc_alloc_resources(fdc); 727 if (error) 728 goto out; 729 730 /* First - lets reset the floppy controller */ 731 fdout_wr(fdc, 0); 732 DELAY(100); 733 fdout_wr(fdc, FDO_FRST); 734 735 /* see if it can handle a command */ 736 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 737 NE7_SPEC_2(2, 0), 0)) { 738 error = ENXIO; 739 goto out; 740 } 741 742 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 743 ic_type = (u_char)ic_type; 744 switch (ic_type) { 745 case 0x80: 746 device_set_desc(dev, "NEC 765 or clone"); 747 fdc->fdct = FDC_NE765; 748 break; 749 case 0x81: 750 device_set_desc(dev, "Intel 82077 or clone"); 751 fdc->fdct = FDC_I82077; 752 break; 753 case 0x90: 754 device_set_desc(dev, "NEC 72065B or clone"); 755 fdc->fdct = FDC_NE72065; 756 break; 757 default: 758 device_set_desc(dev, "generic floppy controller"); 759 fdc->fdct = FDC_UNKNOWN; 760 break; 761 } 762 } 763 764 out: 765 fdc_release_resources(fdc); 766 return (error); 767 } 768 769 #if NCARD > 0 770 771 static int 772 fdc_pccard_probe(device_t dev) 773 { 774 int error; 775 struct fdc_data *fdc; 776 777 fdc = device_get_softc(dev); 778 bzero(fdc, sizeof *fdc); 779 fdc->fdc_dev = dev; 780 fdc->fdctl_wr = fdctl_wr_pcmcia; 781 782 fdc->flags |= FDC_ISPCMCIA | FDC_NODMA; 783 784 /* Attempt to allocate our resources for the duration of the probe */ 785 error = fdc_alloc_resources(fdc); 786 if (error) 787 goto out; 788 789 /* First - lets reset the floppy controller */ 790 fdout_wr(fdc, 0); 791 DELAY(100); 792 fdout_wr(fdc, FDO_FRST); 793 794 /* see if it can handle a command */ 795 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 796 NE7_SPEC_2(2, 0), 0)) { 797 error = ENXIO; 798 goto out; 799 } 800 801 device_set_desc(dev, "Y-E Data PCMCIA floppy"); 802 fdc->fdct = FDC_NE765; 803 804 out: 805 fdc_release_resources(fdc); 806 return (error); 807 } 808 809 static int 810 fdc_pccard_detach(device_t dev) 811 { 812 struct fdc_data *fdc; 813 int error; 814 815 fdc = device_get_softc(dev); 816 817 /* have our children detached first */ 818 if ((error = bus_generic_detach(dev))) 819 return (error); 820 821 if ((fdc->flags & FDC_ATTACHED) == 0) { 822 device_printf(dev, "already unloaded\n"); 823 return (0); 824 } 825 fdc->flags &= ~FDC_ATTACHED; 826 827 BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq, 828 fdc->fdc_intr); 829 fdc_release_resources(fdc); 830 device_printf(dev, "unload\n"); 831 return (0); 832 } 833 834 #endif /* NCARD > 0 */ 835 836 /* 837 * Add a child device to the fdc controller. It will then be probed etc. 838 */ 839 static void 840 fdc_add_child(device_t dev, const char *name, int unit) 841 { 842 int disabled; 843 struct fdc_ivars *ivar; 844 device_t child; 845 846 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT); 847 if (ivar == NULL) 848 return; 849 bzero(ivar, sizeof *ivar); 850 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 851 ivar->fdunit = 0; 852 child = device_add_child(dev, name, unit); 853 if (child == NULL) 854 return; 855 device_set_ivars(child, ivar); 856 if (resource_int_value(name, unit, "disabled", &disabled) == 0 857 && disabled != 0) 858 device_disable(child); 859 } 860 861 static int 862 fdc_attach(device_t dev) 863 { 864 struct fdc_data *fdc; 865 int i, error; 866 867 fdc = device_get_softc(dev); 868 error = fdc_alloc_resources(fdc); 869 if (error) { 870 device_printf(dev, "cannot re-aquire resources\n"); 871 return error; 872 } 873 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 874 INTR_TYPE_BIO, fdc_intr, fdc, &fdc->fdc_intr); 875 if (error) { 876 device_printf(dev, "cannot setup interrupt\n"); 877 return error; 878 } 879 fdc->fdcu = device_get_unit(dev); 880 fdc->flags |= FDC_ATTACHED; 881 882 if ((fdc->flags & FDC_NODMA) == 0) { 883 /* Acquire the DMA channel forever, The driver will do the rest */ 884 /* XXX should integrate with rman */ 885 isa_dma_acquire(fdc->dmachan); 886 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */); 887 } 888 fdc->state = DEVIDLE; 889 890 /* reset controller, turn motor off, clear fdout mirror reg */ 891 fdout_wr(fdc, ((fdc->fdout = 0))); 892 bufq_init(&fdc->head); 893 894 /* 895 * Probe and attach any children. We should probably detect 896 * devices from the BIOS unless overridden. 897 */ 898 for (i = resource_query_string(-1, "at", device_get_nameunit(dev)); 899 i != -1; 900 i = resource_query_string(i, "at", device_get_nameunit(dev))) 901 fdc_add_child(dev, resource_query_name(i), 902 resource_query_unit(i)); 903 904 return (bus_generic_attach(dev)); 905 } 906 907 static int 908 fdc_print_child(device_t me, device_t child) 909 { 910 int retval = 0; 911 912 retval += bus_print_child_header(me, child); 913 retval += printf(" on %s drive %d\n", device_get_nameunit(me), 914 fdc_get_fdunit(child)); 915 916 return (retval); 917 } 918 919 static device_method_t fdc_methods[] = { 920 /* Device interface */ 921 DEVMETHOD(device_probe, fdc_probe), 922 DEVMETHOD(device_attach, fdc_attach), 923 DEVMETHOD(device_detach, bus_generic_detach), 924 DEVMETHOD(device_shutdown, bus_generic_shutdown), 925 DEVMETHOD(device_suspend, bus_generic_suspend), 926 DEVMETHOD(device_resume, bus_generic_resume), 927 928 /* Bus interface */ 929 DEVMETHOD(bus_print_child, fdc_print_child), 930 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 931 /* Our children never use any other bus interface methods. */ 932 933 { 0, 0 } 934 }; 935 936 static driver_t fdc_driver = { 937 "fdc", 938 fdc_methods, 939 sizeof(struct fdc_data) 940 }; 941 942 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 943 944 #if NCARD > 0 945 946 static device_method_t fdc_pccard_methods[] = { 947 /* Device interface */ 948 DEVMETHOD(device_probe, fdc_pccard_probe), 949 DEVMETHOD(device_attach, fdc_attach), 950 DEVMETHOD(device_detach, fdc_pccard_detach), 951 DEVMETHOD(device_shutdown, bus_generic_shutdown), 952 DEVMETHOD(device_suspend, bus_generic_suspend), 953 DEVMETHOD(device_resume, bus_generic_resume), 954 955 /* Bus interface */ 956 DEVMETHOD(bus_print_child, fdc_print_child), 957 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 958 /* Our children never use any other bus interface methods. */ 959 960 { 0, 0 } 961 }; 962 963 static driver_t fdc_pccard_driver = { 964 "fdc", 965 fdc_pccard_methods, 966 sizeof(struct fdc_data) 967 }; 968 969 DRIVER_MODULE(fdc, pccard, fdc_pccard_driver, fdc_devclass, 0, 0); 970 971 #endif /* NCARD > 0 */ 972 973 /******************************************************************/ 974 /* 975 * devices attached to the controller section. 976 */ 977 static int 978 fd_probe(device_t dev) 979 { 980 int i; 981 u_int fdt, st0, st3; 982 struct fd_data *fd; 983 struct fdc_data *fdc; 984 fdsu_t fdsu; 985 static int fd_fifo = 0; 986 987 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 988 fd = device_get_softc(dev); 989 fdc = device_get_softc(device_get_parent(dev)); 990 991 bzero(fd, sizeof *fd); 992 fd->dev = dev; 993 fd->fdc = fdc; 994 fd->fdsu = fdsu; 995 fd->fdu = device_get_unit(dev); 996 997 #ifdef __i386__ 998 /* look up what bios thinks we have */ 999 switch (fd->fdu) { 1000 case 0: 1001 if ((fdc->flags & FDC_ISPCMCIA)) 1002 fdt = RTCFDT_144M; 1003 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0) 1004 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED; 1005 else 1006 fdt = (rtcin(RTC_FDISKETTE) & 0xf0); 1007 break; 1008 case 1: 1009 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0); 1010 break; 1011 default: 1012 fdt = RTCFDT_NONE; 1013 break; 1014 } 1015 #else 1016 fdt = RTCFDT_144M; /* XXX probably */ 1017 #endif 1018 1019 /* is there a unit? */ 1020 if (fdt == RTCFDT_NONE) 1021 return (ENXIO); 1022 1023 /* select it */ 1024 set_motor(fdc, fdsu, TURNON); 1025 DELAY(1000000); /* 1 sec */ 1026 1027 /* XXX This doesn't work before the first set_motor() */ 1028 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN 1029 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 1030 && enable_fifo(fdc) == 0) { 1031 device_printf(device_get_parent(dev), 1032 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 1033 } 1034 fd_fifo = 1; 1035 1036 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) 1037 && (st3 & NE7_ST3_T0)) { 1038 /* if at track 0, first seek inwards */ 1039 /* seek some steps: */ 1040 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0); 1041 DELAY(300000); /* ...wait a moment... */ 1042 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */ 1043 } 1044 1045 /* If we're at track 0 first seek inwards. */ 1046 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) { 1047 /* Seek some steps... */ 1048 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 1049 /* ...wait a moment... */ 1050 DELAY(300000); 1051 /* make ctrlr happy: */ 1052 fd_sense_int(fdc, 0, 0); 1053 } 1054 } 1055 1056 for (i = 0; i < 2; i++) { 1057 /* 1058 * we must recalibrate twice, just in case the 1059 * heads have been beyond cylinder 76, since most 1060 * FDCs still barf when attempting to recalibrate 1061 * more than 77 steps 1062 */ 1063 /* go back to 0: */ 1064 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 1065 /* a second being enough for full stroke seek*/ 1066 DELAY(i == 0 ? 1000000 : 300000); 1067 1068 /* anything responding? */ 1069 if (fd_sense_int(fdc, &st0, 0) == 0 && 1070 (st0 & NE7_ST0_EC) == 0) 1071 break; /* already probed succesfully */ 1072 } 1073 } 1074 1075 set_motor(fdc, fdsu, TURNOFF); 1076 1077 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */ 1078 return (ENXIO); 1079 1080 fd->track = FD_NO_TRACK; 1081 fd->fdc = fdc; 1082 fd->fdsu = fdsu; 1083 fd->options = 0; 1084 callout_handle_init(&fd->toffhandle); 1085 callout_handle_init(&fd->tohandle); 1086 1087 switch (fdt) { 1088 case RTCFDT_12M: 1089 device_set_desc(dev, "1200-KB 5.25\" drive"); 1090 fd->type = FD_1200; 1091 break; 1092 case RTCFDT_144M | RTCFDT_144M_PRETENDED: 1093 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive"); 1094 fdt = RTCFDT_144M; 1095 fd->type = FD_1440; 1096 case RTCFDT_144M: 1097 device_set_desc(dev, "1440-KB 3.5\" drive"); 1098 fd->type = FD_1440; 1099 break; 1100 case RTCFDT_288M: 1101 case RTCFDT_288M_1: 1102 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 1103 fd->type = FD_1440; 1104 break; 1105 case RTCFDT_360K: 1106 device_set_desc(dev, "360-KB 5.25\" drive"); 1107 fd->type = FD_360; 1108 break; 1109 case RTCFDT_720K: 1110 printf("720-KB 3.5\" drive"); 1111 fd->type = FD_720; 1112 break; 1113 default: 1114 return (ENXIO); 1115 } 1116 return (0); 1117 } 1118 1119 static int 1120 fd_attach(device_t dev) 1121 { 1122 struct fd_data *fd; 1123 #if 0 1124 int i; 1125 int mynor; 1126 int typemynor; 1127 int typesize; 1128 #endif 1129 static int cdevsw_add_done = 0; 1130 1131 fd = device_get_softc(dev); 1132 1133 if (!cdevsw_add_done) { 1134 cdevsw_add(&fd_cdevsw); /* XXX */ 1135 cdevsw_add_done++; 1136 } 1137 make_dev(&fd_cdevsw, (fd->fdu << 6), 1138 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu); 1139 1140 #if 0 1141 /* Other make_dev() go here. */ 1142 #endif 1143 1144 /* 1145 * Export the drive to the devstat interface. 1146 */ 1147 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1148 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS, 1149 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1150 DEVSTAT_PRIORITY_FD); 1151 return (0); 1152 } 1153 1154 static int 1155 fd_detach(device_t dev) 1156 { 1157 struct fd_data *fd; 1158 1159 fd = device_get_softc(dev); 1160 untimeout(fd_turnoff, fd, fd->toffhandle); 1161 1162 return (0); 1163 } 1164 1165 static device_method_t fd_methods[] = { 1166 /* Device interface */ 1167 DEVMETHOD(device_probe, fd_probe), 1168 DEVMETHOD(device_attach, fd_attach), 1169 DEVMETHOD(device_detach, fd_detach), 1170 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1171 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1172 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1173 1174 { 0, 0 } 1175 }; 1176 1177 static driver_t fd_driver = { 1178 "fd", 1179 fd_methods, 1180 sizeof(struct fd_data) 1181 }; 1182 1183 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1184 1185 /****************************************************************************/ 1186 /* motor control stuff */ 1187 /* remember to not deselect the drive we're working on */ 1188 /****************************************************************************/ 1189 static void 1190 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1191 { 1192 int fdout = fdc->fdout; 1193 int needspecify = 0; 1194 1195 if(turnon) { 1196 fdout &= ~FDO_FDSEL; 1197 fdout |= (FDO_MOEN0 << fdsu) + fdsu; 1198 } else 1199 fdout &= ~(FDO_MOEN0 << fdsu); 1200 1201 if(!turnon 1202 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0) 1203 /* gonna turn off the last drive, put FDC to bed */ 1204 fdout &= ~ (FDO_FRST|FDO_FDMAEN); 1205 else { 1206 /* make sure controller is selected and specified */ 1207 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0) 1208 needspecify = 1; 1209 fdout |= (FDO_FRST|FDO_FDMAEN); 1210 } 1211 1212 fdout_wr(fdc, fdout); 1213 fdc->fdout = fdout; 1214 TRACE1("[0x%x->FDOUT]", fdout); 1215 1216 if (needspecify) { 1217 /* 1218 * XXX 1219 * special case: since we have just woken up the FDC 1220 * from its sleep, we silently assume the command will 1221 * be accepted, and do not test for a timeout 1222 */ 1223 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1224 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1225 0); 1226 if (fdc->flags & FDC_HAS_FIFO) 1227 (void) enable_fifo(fdc); 1228 } 1229 } 1230 1231 static void 1232 fd_turnoff(void *xfd) 1233 { 1234 int s; 1235 fd_p fd = xfd; 1236 1237 TRACE1("[fd%d: turnoff]", fd->fdu); 1238 1239 s = splbio(); 1240 /* 1241 * Don't turn off the motor yet if the drive is active. 1242 * 1243 * If we got here, this could only mean we missed an interrupt. 1244 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1245 * after a controller reset. Just schedule a pseudo-interrupt 1246 * so the state machine gets re-entered. 1247 */ 1248 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1249 fdc_intr(fd->fdc); 1250 splx(s); 1251 return; 1252 } 1253 1254 fd->flags &= ~FD_MOTOR; 1255 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1256 splx(s); 1257 } 1258 1259 static void 1260 fd_motor_on(void *xfd) 1261 { 1262 int s; 1263 fd_p fd = xfd; 1264 1265 s = splbio(); 1266 fd->flags &= ~FD_MOTOR_WAIT; 1267 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1268 { 1269 fdc_intr(fd->fdc); 1270 } 1271 splx(s); 1272 } 1273 1274 static void 1275 fd_turnon(fd_p fd) 1276 { 1277 if(!(fd->flags & FD_MOTOR)) 1278 { 1279 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1280 set_motor(fd->fdc, fd->fdsu, TURNON); 1281 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */ 1282 } 1283 } 1284 1285 static void 1286 fdc_reset(fdc_p fdc) 1287 { 1288 /* Try a reset, keep motor on */ 1289 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1290 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1291 DELAY(100); 1292 /* enable FDC, but defer interrupts a moment */ 1293 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1294 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1295 DELAY(100); 1296 fdout_wr(fdc, fdc->fdout); 1297 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1298 1299 /* XXX after a reset, silently believe the FDC will accept commands */ 1300 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1301 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1302 0); 1303 if (fdc->flags & FDC_HAS_FIFO) 1304 (void) enable_fifo(fdc); 1305 } 1306 1307 /****************************************************************************/ 1308 /* fdc in/out */ 1309 /****************************************************************************/ 1310 /* 1311 * FDC IO functions, take care of the main status register, timeout 1312 * in case the desired status bits are never set. 1313 * 1314 * These PIO loops initially start out with short delays between 1315 * each iteration in the expectation that the required condition 1316 * is usually met quickly, so it can be handled immediately. After 1317 * about 1 ms, stepping is increased to achieve a better timing 1318 * accuracy in the calls to DELAY(). 1319 */ 1320 static int 1321 fd_in(struct fdc_data *fdc, int *ptr) 1322 { 1323 int i, j, step; 1324 1325 for (j = 0, step = 1; 1326 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) && 1327 j < FDSTS_TIMEOUT; 1328 j += step) { 1329 if (i == NE7_RQM) 1330 return (fdc_err(fdc, "ready for output in input\n")); 1331 if (j == 1000) 1332 step = 1000; 1333 DELAY(step); 1334 } 1335 if (j >= FDSTS_TIMEOUT) 1336 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); 1337 #ifdef FDC_DEBUG 1338 i = fddata_rd(fdc); 1339 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1340 *ptr = i; 1341 return (0); 1342 #else /* !FDC_DEBUG */ 1343 i = fddata_rd(fdc); 1344 if (ptr) 1345 *ptr = i; 1346 return (0); 1347 #endif /* FDC_DEBUG */ 1348 } 1349 1350 static int 1351 out_fdc(struct fdc_data *fdc, int x) 1352 { 1353 int i, j, step; 1354 1355 for (j = 0, step = 1; 1356 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM && 1357 j < FDSTS_TIMEOUT; 1358 j += step) { 1359 if (i == (NE7_DIO|NE7_RQM)) 1360 return (fdc_err(fdc, "ready for input in output\n")); 1361 if (j == 1000) 1362 step = 1000; 1363 DELAY(step); 1364 } 1365 if (j >= FDSTS_TIMEOUT) 1366 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); 1367 1368 /* Send the command and return */ 1369 fddata_wr(fdc, x); 1370 TRACE1("[0x%x->FDDATA]", x); 1371 return (0); 1372 } 1373 1374 /****************************************************************************/ 1375 /* fdopen/fdclose */ 1376 /****************************************************************************/ 1377 int 1378 Fdopen(dev_t dev, int flags, int mode, struct thread *td) 1379 { 1380 fdu_t fdu = FDUNIT(minor(dev)); 1381 int type = FDTYPE(minor(dev)); 1382 fd_p fd; 1383 fdc_p fdc; 1384 1385 /* check bounds */ 1386 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1387 return (ENXIO); 1388 fdc = fd->fdc; 1389 if ((fdc == NULL) || (fd->type == NO_TYPE)) 1390 return (ENXIO); 1391 if (type > NUMDENS) 1392 return (ENXIO); 1393 if (type == 0) 1394 type = fd->type; 1395 else { 1396 /* 1397 * For each type of basic drive, make sure we are trying 1398 * to open a type it can do, 1399 */ 1400 if (type != fd->type) { 1401 switch (fd->type) { 1402 case FD_360: 1403 return (ENXIO); 1404 case FD_720: 1405 if ( type != FD_820 1406 && type != FD_800 1407 && type != FD_640 1408 ) 1409 return (ENXIO); 1410 break; 1411 case FD_1200: 1412 switch (type) { 1413 case FD_1480: 1414 type = FD_1480in5_25; 1415 break; 1416 case FD_1440: 1417 type = FD_1440in5_25; 1418 break; 1419 case FD_1232: 1420 break; 1421 case FD_820: 1422 type = FD_820in5_25; 1423 break; 1424 case FD_800: 1425 type = FD_800in5_25; 1426 break; 1427 case FD_720: 1428 type = FD_720in5_25; 1429 break; 1430 case FD_640: 1431 type = FD_640in5_25; 1432 break; 1433 case FD_360: 1434 type = FD_360in5_25; 1435 break; 1436 default: 1437 return(ENXIO); 1438 } 1439 break; 1440 case FD_1440: 1441 if ( type != FD_1720 1442 && type != FD_1480 1443 && type != FD_1200 1444 && type != FD_820 1445 && type != FD_800 1446 && type != FD_720 1447 && type != FD_640 1448 ) 1449 return(ENXIO); 1450 break; 1451 } 1452 } 1453 } 1454 fd->ft = fd_types + type - 1; 1455 fd->flags |= FD_OPEN; 1456 /* 1457 * Clearing the DMA overrun counter at open time is a bit messy. 1458 * Since we're only managing one counter per controller, opening 1459 * the second drive could mess it up. Anyway, if the DMA overrun 1460 * condition is really persistent, it will eventually time out 1461 * still. OTOH, clearing it here will ensure we'll at least start 1462 * trying again after a previous (maybe even long ago) failure. 1463 * Also, this is merely a stop-gap measure only that should not 1464 * happen during normal operation, so we can tolerate it to be a 1465 * bit sloppy about this. 1466 */ 1467 fdc->dma_overruns = 0; 1468 1469 return 0; 1470 } 1471 1472 int 1473 fdclose(dev_t dev, int flags, int mode, struct thread *td) 1474 { 1475 fdu_t fdu = FDUNIT(minor(dev)); 1476 struct fd_data *fd; 1477 1478 fd = devclass_get_softc(fd_devclass, fdu); 1479 fd->flags &= ~FD_OPEN; 1480 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG); 1481 1482 return (0); 1483 } 1484 1485 /****************************************************************************/ 1486 /* fdstrategy */ 1487 /****************************************************************************/ 1488 void 1489 fdstrategy(struct buf *bp) 1490 { 1491 unsigned nblocks, blknum, cando; 1492 int s; 1493 fdu_t fdu; 1494 fdc_p fdc; 1495 fd_p fd; 1496 size_t fdblk; 1497 1498 fdu = FDUNIT(minor(bp->b_dev)); 1499 fd = devclass_get_softc(fd_devclass, fdu); 1500 if (fd == 0) 1501 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1502 (u_long)major(bp->b_dev), (u_long)minor(bp->b_dev)); 1503 fdc = fd->fdc; 1504 if (fd->type == NO_TYPE) { 1505 bp->b_error = ENXIO; 1506 bp->b_flags |= B_ERROR; 1507 goto bad; 1508 }; 1509 1510 fdblk = 128 << (fd->ft->secsize); 1511 if (!(bp->b_flags & B_FORMAT)) { 1512 if (bp->b_blkno < 0) { 1513 printf( 1514 "fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n", 1515 fdu, (u_long)bp->b_blkno, bp->b_bcount); 1516 bp->b_error = EINVAL; 1517 bp->b_flags |= B_ERROR; 1518 goto bad; 1519 } 1520 if ((bp->b_bcount % fdblk) != 0) { 1521 bp->b_error = EINVAL; 1522 bp->b_flags |= B_ERROR; 1523 goto bad; 1524 } 1525 } 1526 1527 /* 1528 * Set up block calculations. 1529 */ 1530 if (bp->b_blkno > 20000000) { 1531 /* 1532 * Reject unreasonably high block number, prevent the 1533 * multiplication below from overflowing. 1534 */ 1535 bp->b_error = EINVAL; 1536 bp->b_flags |= B_ERROR; 1537 goto bad; 1538 } 1539 blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk; 1540 nblocks = fd->ft->size; 1541 bp->b_resid = 0; 1542 if (blknum + (bp->b_bcount / fdblk) > nblocks) { 1543 if (blknum <= nblocks) { 1544 cando = (nblocks - blknum) * fdblk; 1545 bp->b_resid = bp->b_bcount - cando; 1546 if (cando == 0) 1547 goto bad; /* not actually bad but EOF */ 1548 } else { 1549 bp->b_error = EINVAL; 1550 bp->b_flags |= B_ERROR; 1551 goto bad; 1552 } 1553 } 1554 bp->b_pblkno = bp->b_blkno; 1555 s = splbio(); 1556 bufqdisksort(&fdc->head, bp); 1557 untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */ 1558 1559 /* Tell devstat we are starting on the transaction */ 1560 devstat_start_transaction(&fd->device_stats); 1561 device_busy(fd->dev); 1562 1563 fdstart(fdc); 1564 splx(s); 1565 return; 1566 1567 bad: 1568 biodone(bp); 1569 } 1570 1571 /***************************************************************\ 1572 * fdstart * 1573 * We have just queued something.. if the controller is not busy * 1574 * then simulate the case where it has just finished a command * 1575 * So that it (the interrupt routine) looks on the queue for more* 1576 * work to do and picks up what we just added. * 1577 * If the controller is already busy, we need do nothing, as it * 1578 * will pick up our work when the present work completes * 1579 \***************************************************************/ 1580 static void 1581 fdstart(struct fdc_data *fdc) 1582 { 1583 int s; 1584 1585 s = splbio(); 1586 if(fdc->state == DEVIDLE) 1587 { 1588 fdc_intr(fdc); 1589 } 1590 splx(s); 1591 } 1592 1593 static void 1594 fd_iotimeout(void *xfdc) 1595 { 1596 fdc_p fdc; 1597 int s; 1598 1599 fdc = xfdc; 1600 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1601 1602 /* 1603 * Due to IBM's brain-dead design, the FDC has a faked ready 1604 * signal, hardwired to ready == true. Thus, any command 1605 * issued if there's no diskette in the drive will _never_ 1606 * complete, and must be aborted by resetting the FDC. 1607 * Many thanks, Big Blue! 1608 * The FDC must not be reset directly, since that would 1609 * interfere with the state machine. Instead, pretend that 1610 * the command completed but was invalid. The state machine 1611 * will reset the FDC and retry once. 1612 */ 1613 s = splbio(); 1614 fdc->status[0] = NE7_ST0_IC_IV; 1615 fdc->flags &= ~FDC_STAT_VALID; 1616 fdc->state = IOTIMEDOUT; 1617 fdc_intr(fdc); 1618 splx(s); 1619 } 1620 1621 /* just ensure it has the right spl */ 1622 static void 1623 fd_pseudointr(void *xfdc) 1624 { 1625 int s; 1626 1627 s = splbio(); 1628 fdc_intr(xfdc); 1629 splx(s); 1630 } 1631 1632 /***********************************************************************\ 1633 * fdintr * 1634 * keep calling the state machine until it returns a 0 * 1635 * ALWAYS called at SPLBIO * 1636 \***********************************************************************/ 1637 static void 1638 fdc_intr(void *xfdc) 1639 { 1640 fdc_p fdc = xfdc; 1641 while(fdstate(fdc)) 1642 ; 1643 } 1644 1645 /* 1646 * magic pseudo-DMA initialization for YE FDC. Sets count and 1647 * direction 1648 */ 1649 #define SET_BCDR(fdc,wr,cnt,port) \ 1650 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1651 ((cnt)-1) & 0xff); \ 1652 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1653 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1654 1655 /* 1656 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy 1657 */ 1658 static int fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count) 1659 { 1660 u_char *cptr = (u_char *)addr; 1661 1662 if (flags & B_READ) { 1663 if (fdc->state != PIOREAD) { 1664 fdc->state = PIOREAD; 1665 return(0); 1666 }; 1667 SET_BCDR(fdc, 0, count, 0); 1668 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1669 FDC_YE_DATAPORT, cptr, count); 1670 } else { 1671 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1672 FDC_YE_DATAPORT, cptr, count); 1673 SET_BCDR(fdc, 0, count, 0); 1674 }; 1675 return(1); 1676 } 1677 1678 /***********************************************************************\ 1679 * The controller state machine. * 1680 * if it returns a non zero value, it should be called again immediatly * 1681 \***********************************************************************/ 1682 static int 1683 fdstate(fdc_p fdc) 1684 { 1685 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3; 1686 unsigned blknum = 0, b_cylinder = 0; 1687 fdu_t fdu = fdc->fdu; 1688 fd_p fd; 1689 struct buf *bp; 1690 struct fd_formb *finfo = NULL; 1691 size_t fdblk; 1692 1693 bp = fdc->bp; 1694 if (bp == NULL) { 1695 bp = bufq_first(&fdc->head); 1696 if (bp != NULL) { 1697 bufq_remove(&fdc->head, bp); 1698 fdc->bp = bp; 1699 } 1700 } 1701 if (bp == NULL) { 1702 /***********************************************\ 1703 * nothing left for this controller to do * 1704 * Force into the IDLE state, * 1705 \***********************************************/ 1706 fdc->state = DEVIDLE; 1707 if (fdc->fd) { 1708 device_printf(fdc->fdc_dev, 1709 "unexpected valid fd pointer\n"); 1710 fdc->fd = (fd_p) 0; 1711 fdc->fdu = -1; 1712 } 1713 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1714 return (0); 1715 } 1716 fdu = FDUNIT(minor(bp->b_dev)); 1717 fd = devclass_get_softc(fd_devclass, fdu); 1718 fdblk = 128 << fd->ft->secsize; 1719 if (fdc->fd && (fd != fdc->fd)) 1720 device_printf(fd->dev, "confused fd pointers\n"); 1721 read = bp->b_flags & B_READ; 1722 format = bp->b_flags & B_FORMAT; 1723 if (format) { 1724 finfo = (struct fd_formb *)bp->b_data; 1725 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 1726 - (char *)finfo; 1727 } 1728 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) { 1729 blknum = (unsigned) bp->b_pblkno * DEV_BSIZE/fdblk + 1730 fd->skip/fdblk; 1731 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 1732 } 1733 TRACE1("fd%d", fdu); 1734 TRACE1("[%s]", fdstates[fdc->state]); 1735 TRACE1("(0x%x)", fd->flags); 1736 untimeout(fd_turnoff, fd, fd->toffhandle); 1737 fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz); 1738 switch (fdc->state) 1739 { 1740 case DEVIDLE: 1741 case FINDWORK: /* we have found new work */ 1742 fdc->retry = 0; 1743 fd->skip = 0; 1744 fdc->fd = fd; 1745 fdc->fdu = fdu; 1746 fdc->fdctl_wr(fdc, fd->ft->trans); 1747 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 1748 /*******************************************************\ 1749 * If the next drive has a motor startup pending, then * 1750 * it will start up in its own good time * 1751 \*******************************************************/ 1752 if(fd->flags & FD_MOTOR_WAIT) { 1753 fdc->state = MOTORWAIT; 1754 return (0); /* come back later */ 1755 } 1756 /*******************************************************\ 1757 * Maybe if it's not starting, it SHOULD be starting * 1758 \*******************************************************/ 1759 if (!(fd->flags & FD_MOTOR)) 1760 { 1761 fdc->state = MOTORWAIT; 1762 fd_turnon(fd); 1763 return (0); 1764 } 1765 else /* at least make sure we are selected */ 1766 { 1767 set_motor(fdc, fd->fdsu, TURNON); 1768 } 1769 if (fdc->flags & FDC_NEEDS_RESET) { 1770 fdc->state = RESETCTLR; 1771 fdc->flags &= ~FDC_NEEDS_RESET; 1772 } else 1773 fdc->state = DOSEEK; 1774 break; 1775 case DOSEEK: 1776 if (b_cylinder == (unsigned)fd->track) 1777 { 1778 fdc->state = SEEKCOMPLETE; 1779 break; 1780 } 1781 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 1782 fd->fdsu, b_cylinder * fd->ft->steptrac, 1783 0)) 1784 { 1785 /* 1786 * seek command not accepted, looks like 1787 * the FDC went off to the Saints... 1788 */ 1789 fdc->retry = 6; /* try a reset */ 1790 return(retrier(fdc)); 1791 } 1792 fd->track = FD_NO_TRACK; 1793 fdc->state = SEEKWAIT; 1794 return(0); /* will return later */ 1795 case SEEKWAIT: 1796 /* allow heads to settle */ 1797 timeout(fd_pseudointr, fdc, hz / 16); 1798 fdc->state = SEEKCOMPLETE; 1799 return(0); /* will return later */ 1800 case SEEKCOMPLETE : /* SEEK DONE, START DMA */ 1801 /* Make sure seek really happened*/ 1802 if(fd->track == FD_NO_TRACK) { 1803 int descyl = b_cylinder * fd->ft->steptrac; 1804 do { 1805 /* 1806 * This might be a "ready changed" interrupt, 1807 * which cannot really happen since the 1808 * RDY pin is hardwired to + 5 volts. This 1809 * generally indicates a "bouncing" intr 1810 * line, so do one of the following: 1811 * 1812 * When running on an enhanced FDC that is 1813 * known to not go stuck after responding 1814 * with INVALID, fetch all interrupt states 1815 * until seeing either an INVALID or a 1816 * real interrupt condition. 1817 * 1818 * When running on a dumb old NE765, give 1819 * up immediately. The controller will 1820 * provide up to four dummy RC interrupt 1821 * conditions right after reset (for the 1822 * corresponding four drives), so this is 1823 * our only chance to get notice that it 1824 * was not the FDC that caused the interrupt. 1825 */ 1826 if (fd_sense_int(fdc, &st0, &cyl) 1827 == FD_NOT_VALID) 1828 return 0; 1829 if(fdc->fdct == FDC_NE765 1830 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1831 return 0; /* hope for a real intr */ 1832 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1833 1834 if (0 == descyl) { 1835 int failed = 0; 1836 /* 1837 * seek to cyl 0 requested; make sure we are 1838 * really there 1839 */ 1840 if (fd_sense_drive_status(fdc, &st3)) 1841 failed = 1; 1842 if ((st3 & NE7_ST3_T0) == 0) { 1843 printf( 1844 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 1845 fdu, st3, NE7_ST3BITS); 1846 failed = 1; 1847 } 1848 1849 if (failed) { 1850 if(fdc->retry < 3) 1851 fdc->retry = 3; 1852 return (retrier(fdc)); 1853 } 1854 } 1855 1856 if (cyl != descyl) { 1857 printf( 1858 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 1859 fdu, descyl, cyl, st0); 1860 if (fdc->retry < 3) 1861 fdc->retry = 3; 1862 return (retrier(fdc)); 1863 } 1864 } 1865 1866 fd->track = b_cylinder; 1867 if (!(fdc->flags & FDC_NODMA)) 1868 isa_dmastart(bp->b_flags, bp->b_data+fd->skip, 1869 format ? bp->b_bcount : fdblk, fdc->dmachan); 1870 sectrac = fd->ft->sectrac; 1871 sec = blknum % (sectrac * fd->ft->heads); 1872 head = sec / sectrac; 1873 sec = sec % sectrac + 1; 1874 fd->hddrv = ((head&1)<<2)+fdu; 1875 1876 if(format || !read) 1877 { 1878 /* make sure the drive is writable */ 1879 if(fd_sense_drive_status(fdc, &st3) != 0) 1880 { 1881 /* stuck controller? */ 1882 if (!(fdc->flags & FDC_NODMA)) 1883 isa_dmadone(bp->b_flags, 1884 bp->b_data + fd->skip, 1885 format ? bp->b_bcount : fdblk, 1886 fdc->dmachan); 1887 fdc->retry = 6; /* reset the beast */ 1888 return (retrier(fdc)); 1889 } 1890 if(st3 & NE7_ST3_WP) 1891 { 1892 /* 1893 * XXX YES! this is ugly. 1894 * in order to force the current operation 1895 * to fail, we will have to fake an FDC 1896 * error - all error handling is done 1897 * by the retrier() 1898 */ 1899 fdc->status[0] = NE7_ST0_IC_AT; 1900 fdc->status[1] = NE7_ST1_NW; 1901 fdc->status[2] = 0; 1902 fdc->status[3] = fd->track; 1903 fdc->status[4] = head; 1904 fdc->status[5] = sec; 1905 fdc->retry = 8; /* break out immediately */ 1906 fdc->state = IOTIMEDOUT; /* not really... */ 1907 return (1); 1908 } 1909 } 1910 1911 if (format) { 1912 if (fdc->flags & FDC_NODMA) { 1913 /* 1914 * This seems to be necessary for 1915 * whatever obscure reason; if we omit 1916 * it, we end up filling the sector ID 1917 * fields of the newly formatted track 1918 * entirely with garbage, causing 1919 * `wrong cylinder' errors all over 1920 * the place when trying to read them 1921 * back. 1922 * 1923 * Umpf. 1924 */ 1925 SET_BCDR(fdc, 1, bp->b_bcount, 0); 1926 1927 (void)fdcpio(fdc,bp->b_flags, 1928 bp->b_data+fd->skip, 1929 bp->b_bcount); 1930 1931 } 1932 /* formatting */ 1933 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu, 1934 finfo->fd_formb_secshift, 1935 finfo->fd_formb_nsecs, 1936 finfo->fd_formb_gaplen, 1937 finfo->fd_formb_fillbyte, 0)) { 1938 /* controller fell over */ 1939 if (!(fdc->flags & FDC_NODMA)) 1940 isa_dmadone(bp->b_flags, 1941 bp->b_data + fd->skip, 1942 format ? bp->b_bcount : fdblk, 1943 fdc->dmachan); 1944 fdc->retry = 6; 1945 return (retrier(fdc)); 1946 } 1947 } else { 1948 if (fdc->flags & FDC_NODMA) { 1949 /* 1950 * this seems to be necessary even when 1951 * reading data 1952 */ 1953 SET_BCDR(fdc, 1, fdblk, 0); 1954 1955 /* 1956 * perform the write pseudo-DMA before 1957 * the WRITE command is sent 1958 */ 1959 if (!read) 1960 (void)fdcpio(fdc,bp->b_flags, 1961 bp->b_data+fd->skip, 1962 fdblk); 1963 } 1964 if (fd_cmd(fdc, 9, 1965 (read ? NE7CMD_READ : NE7CMD_WRITE), 1966 head << 2 | fdu, /* head & unit */ 1967 fd->track, /* track */ 1968 head, 1969 sec, /* sector + 1 */ 1970 fd->ft->secsize, /* sector size */ 1971 sectrac, /* sectors/track */ 1972 fd->ft->gap, /* gap size */ 1973 fd->ft->datalen, /* data length */ 1974 0)) { 1975 /* the beast is sleeping again */ 1976 if (!(fdc->flags & FDC_NODMA)) 1977 isa_dmadone(bp->b_flags, 1978 bp->b_data + fd->skip, 1979 format ? bp->b_bcount : fdblk, 1980 fdc->dmachan); 1981 fdc->retry = 6; 1982 return (retrier(fdc)); 1983 } 1984 } 1985 if (fdc->flags & FDC_NODMA) 1986 /* 1987 * if this is a read, then simply await interrupt 1988 * before performing PIO 1989 */ 1990 if (read && !fdcpio(fdc,bp->b_flags, 1991 bp->b_data+fd->skip,fdblk)) { 1992 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 1993 return(0); /* will return later */ 1994 }; 1995 1996 /* 1997 * write (or format) operation will fall through and 1998 * await completion interrupt 1999 */ 2000 fdc->state = IOCOMPLETE; 2001 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2002 return (0); /* will return later */ 2003 case PIOREAD: 2004 /* 2005 * actually perform the PIO read. The IOCOMPLETE case 2006 * removes the timeout for us. 2007 */ 2008 (void)fdcpio(fdc,bp->b_flags,bp->b_data+fd->skip,fdblk); 2009 fdc->state = IOCOMPLETE; 2010 /* FALLTHROUGH */ 2011 case IOCOMPLETE: /* IO DONE, post-analyze */ 2012 untimeout(fd_iotimeout, fdc, fd->tohandle); 2013 2014 if (fd_read_status(fdc, fd->fdsu)) { 2015 if (!(fdc->flags & FDC_NODMA)) 2016 isa_dmadone(bp->b_flags, bp->b_data + fd->skip, 2017 format ? bp->b_bcount : fdblk, 2018 fdc->dmachan); 2019 if (fdc->retry < 6) 2020 fdc->retry = 6; /* force a reset */ 2021 return (retrier(fdc)); 2022 } 2023 2024 fdc->state = IOTIMEDOUT; 2025 2026 /* FALLTHROUGH */ 2027 2028 case IOTIMEDOUT: 2029 if (!(fdc->flags & FDC_NODMA)) 2030 isa_dmadone(bp->b_flags, bp->b_data + fd->skip, 2031 format ? bp->b_bcount : fdblk, fdc->dmachan); 2032 if (fdc->status[0] & NE7_ST0_IC) { 2033 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2034 && fdc->status[1] & NE7_ST1_OR) { 2035 /* 2036 * DMA overrun. Someone hogged the bus and 2037 * didn't release it in time for the next 2038 * FDC transfer. 2039 * 2040 * We normally restart this without bumping 2041 * the retry counter. However, in case 2042 * something is seriously messed up (like 2043 * broken hardware), we rather limit the 2044 * number of retries so the IO operation 2045 * doesn't block indefinately. 2046 */ 2047 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 2048 fdc->state = SEEKCOMPLETE; 2049 return (1); 2050 } /* else fall through */ 2051 } 2052 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 2053 && fdc->retry < 6) 2054 fdc->retry = 6; /* force a reset */ 2055 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2056 && fdc->status[2] & NE7_ST2_WC 2057 && fdc->retry < 3) 2058 fdc->retry = 3; /* force recalibrate */ 2059 return (retrier(fdc)); 2060 } 2061 /* All OK */ 2062 /* Operation successful, retry DMA overruns again next time. */ 2063 fdc->dma_overruns = 0; 2064 fd->skip += fdblk; 2065 if (!format && fd->skip < bp->b_bcount - bp->b_resid) { 2066 /* set up next transfer */ 2067 fdc->state = DOSEEK; 2068 } else { 2069 /* ALL DONE */ 2070 fd->skip = 0; 2071 fdc->bp = NULL; 2072 device_unbusy(fd->dev); 2073 devstat_end_transaction_buf(&fd->device_stats, bp); 2074 biodone(bp); 2075 fdc->fd = (fd_p) 0; 2076 fdc->fdu = -1; 2077 fdc->state = FINDWORK; 2078 } 2079 return (1); 2080 case RESETCTLR: 2081 fdc_reset(fdc); 2082 fdc->retry++; 2083 fdc->state = RESETCOMPLETE; 2084 return (0); 2085 case RESETCOMPLETE: 2086 /* 2087 * Discard all the results from the reset so that they 2088 * can't cause an unexpected interrupt later. 2089 */ 2090 for (i = 0; i < 4; i++) 2091 (void)fd_sense_int(fdc, &st0, &cyl); 2092 fdc->state = STARTRECAL; 2093 /* Fall through. */ 2094 case STARTRECAL: 2095 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 2096 /* arrgl */ 2097 fdc->retry = 6; 2098 return (retrier(fdc)); 2099 } 2100 fdc->state = RECALWAIT; 2101 return (0); /* will return later */ 2102 case RECALWAIT: 2103 /* allow heads to settle */ 2104 timeout(fd_pseudointr, fdc, hz / 8); 2105 fdc->state = RECALCOMPLETE; 2106 return (0); /* will return later */ 2107 case RECALCOMPLETE: 2108 do { 2109 /* 2110 * See SEEKCOMPLETE for a comment on this: 2111 */ 2112 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2113 return 0; 2114 if(fdc->fdct == FDC_NE765 2115 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2116 return 0; /* hope for a real intr */ 2117 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2118 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2119 { 2120 if(fdc->retry > 3) 2121 /* 2122 * a recalibrate from beyond cylinder 77 2123 * will "fail" due to the FDC limitations; 2124 * since people used to complain much about 2125 * the failure message, try not logging 2126 * this one if it seems to be the first 2127 * time in a line 2128 */ 2129 printf("fd%d: recal failed ST0 %b cyl %d\n", 2130 fdu, st0, NE7_ST0BITS, cyl); 2131 if(fdc->retry < 3) fdc->retry = 3; 2132 return (retrier(fdc)); 2133 } 2134 fd->track = 0; 2135 /* Seek (probably) necessary */ 2136 fdc->state = DOSEEK; 2137 return (1); /* will return immediatly */ 2138 case MOTORWAIT: 2139 if(fd->flags & FD_MOTOR_WAIT) 2140 { 2141 return (0); /* time's not up yet */ 2142 } 2143 if (fdc->flags & FDC_NEEDS_RESET) { 2144 fdc->state = RESETCTLR; 2145 fdc->flags &= ~FDC_NEEDS_RESET; 2146 } else { 2147 /* 2148 * If all motors were off, then the controller was 2149 * reset, so it has lost track of the current 2150 * cylinder. Recalibrate to handle this case. 2151 * But first, discard the results of the reset. 2152 */ 2153 fdc->state = RESETCOMPLETE; 2154 } 2155 return (1); /* will return immediatly */ 2156 default: 2157 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2158 if (fd_read_status(fdc, fd->fdsu) == 0) 2159 printf("FDC status :%x %x %x %x %x %x %x ", 2160 fdc->status[0], 2161 fdc->status[1], 2162 fdc->status[2], 2163 fdc->status[3], 2164 fdc->status[4], 2165 fdc->status[5], 2166 fdc->status[6] ); 2167 else 2168 printf("No status available "); 2169 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2170 { 2171 printf("[controller is dead now]\n"); 2172 return (0); 2173 } 2174 printf("ST0 = %x, PCN = %x\n", st0, cyl); 2175 return (0); 2176 } 2177 /*XXX confusing: some branches return immediately, others end up here*/ 2178 return (1); /* Come back immediatly to new state */ 2179 } 2180 2181 static int 2182 retrier(struct fdc_data *fdc) 2183 { 2184 struct buf *bp; 2185 struct fd_data *fd; 2186 int fdu; 2187 2188 bp = fdc->bp; 2189 2190 /* XXX shouldn't this be cached somewhere? */ 2191 fdu = FDUNIT(minor(bp->b_dev)); 2192 fd = devclass_get_softc(fd_devclass, fdu); 2193 if (fd->options & FDOPT_NORETRY) 2194 goto fail; 2195 2196 switch (fdc->retry) { 2197 case 0: case 1: case 2: 2198 fdc->state = SEEKCOMPLETE; 2199 break; 2200 case 3: case 4: case 5: 2201 fdc->state = STARTRECAL; 2202 break; 2203 case 6: 2204 fdc->state = RESETCTLR; 2205 break; 2206 case 7: 2207 break; 2208 default: 2209 fail: 2210 { 2211 int printerror = (fd->options & FDOPT_NOERRLOG) == 0; 2212 dev_t sav_b_dev = bp->b_dev; 2213 2214 /* Trick diskerr */ 2215 bp->b_dev = makedev(major(bp->b_dev), 2216 (FDUNIT(minor(bp->b_dev))<<3)|RAW_PART); 2217 if (printerror) 2218 diskerr(bp, "hard error", LOG_PRINTF, 2219 fdc->fd->skip / DEV_BSIZE, 2220 (struct disklabel *)NULL); 2221 bp->b_dev = sav_b_dev; 2222 if (printerror) { 2223 if (fdc->flags & FDC_STAT_VALID) 2224 printf( 2225 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2226 fdc->status[0], NE7_ST0BITS, 2227 fdc->status[1], NE7_ST1BITS, 2228 fdc->status[2], NE7_ST2BITS, 2229 fdc->status[3], fdc->status[4], 2230 fdc->status[5]); 2231 else 2232 printf(" (No status)\n"); 2233 } 2234 } 2235 bp->b_flags |= B_ERROR; 2236 bp->b_error = EIO; 2237 bp->b_resid += bp->b_bcount - fdc->fd->skip; 2238 fdc->bp = NULL; 2239 fdc->fd->skip = 0; 2240 device_unbusy(fd->dev); 2241 devstat_end_transaction_buf(&fdc->fd->device_stats, bp); 2242 biodone(bp); 2243 fdc->state = FINDWORK; 2244 fdc->flags |= FDC_NEEDS_RESET; 2245 fdc->fd = (fd_p) 0; 2246 fdc->fdu = -1; 2247 return (1); 2248 } 2249 fdc->retry++; 2250 return (1); 2251 } 2252 2253 static int 2254 fdformat(dev_t dev, struct fd_formb *finfo, struct thread *td) 2255 { 2256 struct proc *p = td->td_proc; 2257 fdu_t fdu; 2258 fd_p fd; 2259 2260 struct buf *bp; 2261 int rv = 0, s; 2262 size_t fdblk; 2263 2264 fdu = FDUNIT(minor(dev)); 2265 fd = devclass_get_softc(fd_devclass, fdu); 2266 fdblk = 128 << fd->ft->secsize; 2267 2268 /* set up a buffer header for fdstrategy() */ 2269 bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT); 2270 if(bp == 0) 2271 return ENOBUFS; 2272 /* 2273 * keep the process from being swapped 2274 */ 2275 PHOLD(p); 2276 bzero((void *)bp, sizeof(struct buf)); 2277 BUF_LOCKINIT(bp); 2278 BUF_LOCK(bp, LK_EXCLUSIVE); 2279 bp->b_flags = B_PHYS | B_FORMAT; 2280 2281 /* 2282 * calculate a fake blkno, so fdstrategy() would initiate a 2283 * seek to the requested cylinder 2284 */ 2285 bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads) 2286 + finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE; 2287 2288 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; 2289 bp->b_data = (caddr_t)finfo; 2290 2291 /* now do the format */ 2292 bp->b_dev = dev; 2293 BUF_STRATEGY(bp, 0); 2294 2295 /* ...and wait for it to complete */ 2296 s = splbio(); 2297 while(!(bp->b_flags & B_DONE)) { 2298 rv = tsleep((caddr_t)bp, 0, "fdform", 20 * hz); 2299 if (rv == EWOULDBLOCK) 2300 break; 2301 } 2302 splx(s); 2303 2304 if (rv == EWOULDBLOCK) { 2305 /* timed out */ 2306 rv = EIO; 2307 device_unbusy(fd->dev); 2308 biodone(bp); 2309 } 2310 if (bp->b_flags & B_ERROR) 2311 rv = bp->b_error; 2312 /* 2313 * allow the process to be swapped 2314 */ 2315 PRELE(p); 2316 BUF_UNLOCK(bp); 2317 BUF_LOCKFREE(bp); 2318 free(bp, M_TEMP); 2319 return rv; 2320 } 2321 2322 /* 2323 * TODO: don't allocate buffer on stack. 2324 */ 2325 2326 static int 2327 fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 2328 { 2329 fdu_t fdu = FDUNIT(minor(dev)); 2330 fd_p fd = devclass_get_softc(fd_devclass, fdu); 2331 size_t fdblk; 2332 2333 struct fd_type *fdt; 2334 struct disklabel *dl; 2335 struct fdc_status *fsp; 2336 char buffer[DEV_BSIZE]; 2337 int error = 0; 2338 2339 fdblk = 128 << fd->ft->secsize; 2340 2341 switch (cmd) { 2342 case DIOCGDINFO: 2343 bzero(buffer, sizeof (buffer)); 2344 dl = (struct disklabel *)buffer; 2345 dl->d_secsize = fdblk; 2346 fdt = fd->ft; 2347 dl->d_secpercyl = fdt->size / fdt->tracks; 2348 dl->d_type = DTYPE_FLOPPY; 2349 2350 if (readdisklabel(dev, dl) 2351 == NULL) 2352 error = 0; 2353 else 2354 error = EINVAL; 2355 2356 *(struct disklabel *)addr = *dl; 2357 break; 2358 2359 case DIOCSDINFO: 2360 if ((flag & FWRITE) == 0) 2361 error = EBADF; 2362 break; 2363 2364 case DIOCWLABEL: 2365 if ((flag & FWRITE) == 0) 2366 error = EBADF; 2367 break; 2368 2369 case DIOCWDINFO: 2370 if ((flag & FWRITE) == 0) { 2371 error = EBADF; 2372 break; 2373 } 2374 2375 dl = (struct disklabel *)addr; 2376 2377 if ((error = setdisklabel((struct disklabel *)buffer, dl, 2378 (u_long)0)) != 0) 2379 break; 2380 2381 error = writedisklabel(dev, (struct disklabel *)buffer); 2382 break; 2383 case FD_FORM: 2384 if ((flag & FWRITE) == 0) 2385 error = EBADF; /* must be opened for writing */ 2386 else if (((struct fd_formb *)addr)->format_version != 2387 FD_FORMAT_VERSION) 2388 error = EINVAL; /* wrong version of formatting prog */ 2389 else 2390 error = fdformat(dev, (struct fd_formb *)addr, td); 2391 break; 2392 2393 case FD_GTYPE: /* get drive type */ 2394 *(struct fd_type *)addr = *fd->ft; 2395 break; 2396 2397 case FD_STYPE: /* set drive type */ 2398 /* this is considered harmful; only allow for superuser */ 2399 if (suser(td) != 0) 2400 return EPERM; 2401 *fd->ft = *(struct fd_type *)addr; 2402 break; 2403 2404 case FD_GOPTS: /* get drive options */ 2405 *(int *)addr = fd->options; 2406 break; 2407 2408 case FD_SOPTS: /* set drive options */ 2409 fd->options = *(int *)addr; 2410 break; 2411 2412 case FD_GSTAT: 2413 fsp = (struct fdc_status *)addr; 2414 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2415 return EINVAL; 2416 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2417 break; 2418 2419 default: 2420 error = ENOTTY; 2421 break; 2422 } 2423 return (error); 2424 } 2425 2426 /* 2427 * Hello emacs, these are the 2428 * Local Variables: 2429 * c-indent-level: 8 2430 * c-continued-statement-offset: 8 2431 * c-continued-brace-offset: 0 2432 * c-brace-offset: -8 2433 * c-brace-imaginary-offset: 0 2434 * c-argdecl-indent: 8 2435 * c-label-offset: -8 2436 * c++-hanging-braces: 1 2437 * c++-access-specifier-offset: -8 2438 * c++-empty-arglist-indent: 8 2439 * c++-friend-offset: 0 2440 * End: 2441 */ 2442