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 1.31 2006/07/28 02:17:35 dillon Exp $ 55 * 56 */ 57 58 #include "opt_fdc.h" 59 #include "use_pccard.h" 60 61 #include <sys/param.h> 62 #include <sys/systm.h> 63 #include <sys/bootmaj.h> 64 #include <sys/kernel.h> 65 #include <sys/buf.h> 66 #include <sys/bus.h> 67 #include <sys/conf.h> 68 #include <sys/disklabel.h> 69 #include <sys/devicestat.h> 70 #include <sys/fcntl.h> 71 #include <sys/malloc.h> 72 #include <sys/module.h> 73 #include <sys/proc.h> 74 #include <sys/syslog.h> 75 #include <sys/device.h> 76 77 #include <sys/bus.h> 78 #include <machine/bus.h> 79 #include <sys/rman.h> 80 81 #include <sys/buf2.h> 82 #include <sys/thread2.h> 83 84 #include <machine/clock.h> 85 #include <machine/ioctl_fd.h> 86 #include <machine/resource.h> 87 #include <machine/stdarg.h> 88 89 #include <bus/isa/isavar.h> 90 #include <bus/isa/isareg.h> 91 #include "fdreg.h" 92 #include "fdc.h" 93 #include <bus/isa/rtc.h> 94 95 /* configuration flags */ 96 #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */ 97 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ 98 99 /* internally used only, not really from CMOS: */ 100 #define RTCFDT_144M_PRETENDED 0x1000 101 102 /* error returns for fd_cmd() */ 103 #define FD_FAILED -1 104 #define FD_NOT_VALID -2 105 #define FDC_ERRMAX 100 /* do not log more */ 106 /* 107 * Stop retrying after this many DMA overruns. Since each retry takes 108 * one revolution, with 300 rpm., 25 retries take approximately 10 109 * seconds which the read attempt will block in case the DMA overrun 110 * is persistent. 111 */ 112 #define FDC_DMAOV_MAX 25 113 114 /* 115 * Timeout value for the PIO loops to wait until the FDC main status 116 * register matches our expectations (request for master, direction 117 * bit). This is supposed to be a number of microseconds, although 118 * timing might actually not be very accurate. 119 * 120 * Timeouts of 100 msec are believed to be required for some broken 121 * (old) hardware. 122 */ 123 #define FDSTS_TIMEOUT 100000 124 125 #define NUMTYPES 17 126 #define NUMDENS (NUMTYPES - 7) 127 128 /* These defines (-1) must match index for fd_types */ 129 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */ 130 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */ 131 #define FD_1720 1 132 #define FD_1480 2 133 #define FD_1440 3 134 #define FD_1200 4 135 #define FD_820 5 136 #define FD_800 6 137 #define FD_720 7 138 #define FD_360 8 139 #define FD_640 9 140 #define FD_1232 10 141 142 #define FD_1480in5_25 11 143 #define FD_1440in5_25 12 144 #define FD_820in5_25 13 145 #define FD_800in5_25 14 146 #define FD_720in5_25 15 147 #define FD_360in5_25 16 148 #define FD_640in5_25 17 149 150 151 static struct fd_type fd_types[NUMTYPES] = 152 { 153 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */ 154 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */ 155 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */ 156 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */ 157 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */ 158 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */ 159 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */ 160 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */ 161 { 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */ 162 { 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */ 163 164 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */ 165 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */ 166 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */ 167 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */ 168 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */ 169 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */ 170 { 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */ 171 }; 172 173 #define DRVS_PER_CTLR 2 /* 2 floppies */ 174 175 /***********************************************************************\ 176 * Per controller structure. * 177 \***********************************************************************/ 178 devclass_t fdc_devclass; 179 180 /***********************************************************************\ 181 * Per drive structure. * 182 * N per controller (DRVS_PER_CTLR) * 183 \***********************************************************************/ 184 struct fd_data { 185 struct fdc_data *fdc; /* pointer to controller structure */ 186 int fdsu; /* this units number on this controller */ 187 int type; /* Drive type (FD_1440...) */ 188 struct fd_type *ft; /* pointer to the type descriptor */ 189 int flags; 190 #define FD_OPEN 0x01 /* it's open */ 191 #define FD_ACTIVE 0x02 /* it's active */ 192 #define FD_MOTOR 0x04 /* motor should be on */ 193 #define FD_MOTOR_WAIT 0x08 /* motor coming up */ 194 int skip; 195 int hddrv; 196 #define FD_NO_TRACK -2 197 int track; /* where we think the head is */ 198 int options; /* user configurable options, see ioctl_fd.h */ 199 struct callout toffhandle; 200 struct callout tohandle; 201 struct callout motor; 202 struct devstat device_stats; 203 device_t dev; 204 fdu_t fdu; 205 }; 206 207 struct fdc_ivars { 208 int fdunit; 209 }; 210 static devclass_t fd_devclass; 211 212 /***********************************************************************\ 213 * Throughout this file the following conventions will be used: * 214 * fd is a pointer to the fd_data struct for the drive in question * 215 * fdc is a pointer to the fdc_data struct for the controller * 216 * fdu is the floppy drive unit number * 217 * fdcu is the floppy controller unit number * 218 * fdsu is the floppy drive unit number on that controller. (sub-unit) * 219 \***********************************************************************/ 220 221 /* internal functions */ 222 static void fdc_intr(void *); 223 static void set_motor(struct fdc_data *, int, int); 224 # define TURNON 1 225 # define TURNOFF 0 226 static timeout_t fd_turnoff; 227 static timeout_t fd_motor_on; 228 static void fd_turnon(struct fd_data *); 229 static void fdc_reset(fdc_p); 230 static int fd_in(struct fdc_data *, int *); 231 static int out_fdc(struct fdc_data *, int); 232 static void fdstart(struct fdc_data *); 233 static timeout_t fd_iotimeout; 234 static timeout_t fd_pseudointr; 235 static int fdstate(struct fdc_data *); 236 static int retrier(struct fdc_data *); 237 static int fdformat(dev_t, struct fd_formb *, struct ucred *); 238 239 static int enable_fifo(fdc_p fdc); 240 241 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 242 243 244 #define DEVIDLE 0 245 #define FINDWORK 1 246 #define DOSEEK 2 247 #define SEEKCOMPLETE 3 248 #define IOCOMPLETE 4 249 #define RECALCOMPLETE 5 250 #define STARTRECAL 6 251 #define RESETCTLR 7 252 #define SEEKWAIT 8 253 #define RECALWAIT 9 254 #define MOTORWAIT 10 255 #define IOTIMEDOUT 11 256 #define RESETCOMPLETE 12 257 #define PIOREAD 13 258 259 #ifdef FDC_DEBUG 260 static char const * const fdstates[] = 261 { 262 "DEVIDLE", 263 "FINDWORK", 264 "DOSEEK", 265 "SEEKCOMPLETE", 266 "IOCOMPLETE", 267 "RECALCOMPLETE", 268 "STARTRECAL", 269 "RESETCTLR", 270 "SEEKWAIT", 271 "RECALWAIT", 272 "MOTORWAIT", 273 "IOTIMEDOUT", 274 "RESETCOMPLETE", 275 "PIOREAD", 276 }; 277 278 /* CAUTION: fd_debug causes huge amounts of logging output */ 279 static int volatile fd_debug = 0; 280 #define TRACE0(arg) if(fd_debug) printf(arg) 281 #define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2) 282 #else /* FDC_DEBUG */ 283 #define TRACE0(arg) 284 #define TRACE1(arg1, arg2) 285 #endif /* FDC_DEBUG */ 286 287 void 288 fdout_wr(fdc_p fdc, u_int8_t v) 289 { 290 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 291 } 292 293 static u_int8_t 294 fdsts_rd(fdc_p fdc) 295 { 296 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 297 } 298 299 static void 300 fddata_wr(fdc_p fdc, u_int8_t v) 301 { 302 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 303 } 304 305 static u_int8_t 306 fddata_rd(fdc_p fdc) 307 { 308 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 309 } 310 311 static void 312 fdctl_wr_isa(fdc_p fdc, u_int8_t v) 313 { 314 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 315 } 316 317 #if 0 318 319 static u_int8_t 320 fdin_rd(fdc_p fdc) 321 { 322 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 323 } 324 325 #endif 326 327 static d_open_t Fdopen; /* NOTE, not fdopen */ 328 static d_close_t fdclose; 329 static d_ioctl_t fdioctl; 330 static d_strategy_t fdstrategy; 331 332 static struct dev_ops fd_ops = { 333 { "fd", FD_CDEV_MAJOR, D_DISK }, 334 .d_open = Fdopen, 335 .d_close = fdclose, 336 .d_read = physread, 337 .d_write = physwrite, 338 .d_ioctl = fdioctl, 339 .d_strategy = fdstrategy, 340 }; 341 342 static int 343 fdc_err(struct fdc_data *fdc, const char *s) 344 { 345 fdc->fdc_errs++; 346 if (s) { 347 if (fdc->fdc_errs < FDC_ERRMAX) 348 device_printf(fdc->fdc_dev, "%s", s); 349 else if (fdc->fdc_errs == FDC_ERRMAX) 350 device_printf(fdc->fdc_dev, "too many errors, not " 351 "logging any more\n"); 352 } 353 354 return FD_FAILED; 355 } 356 357 /* 358 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 359 * Unit number, 360 * # of output bytes, output bytes as ints ..., 361 * # of input bytes, input bytes as ints ... 362 */ 363 int 364 fd_cmd(struct fdc_data *fdc, int n_out, ...) 365 { 366 u_char cmd; 367 int n_in; 368 int n; 369 __va_list ap; 370 371 __va_start(ap, n_out); 372 cmd = (u_char)(__va_arg(ap, int)); 373 __va_end(ap); 374 __va_start(ap, n_out); 375 for (n = 0; n < n_out; n++) 376 { 377 if (out_fdc(fdc, __va_arg(ap, int)) < 0) 378 { 379 char msg[50]; 380 snprintf(msg, sizeof(msg), 381 "cmd %x failed at out byte %d of %d\n", 382 cmd, n + 1, n_out); 383 return fdc_err(fdc, msg); 384 } 385 } 386 n_in = __va_arg(ap, int); 387 for (n = 0; n < n_in; n++) 388 { 389 int *ptr = __va_arg(ap, int *); 390 if (fd_in(fdc, ptr) < 0) 391 { 392 char msg[50]; 393 snprintf(msg, sizeof(msg), 394 "cmd %02x failed at in byte %d of %d\n", 395 cmd, n + 1, n_in); 396 return fdc_err(fdc, msg); 397 } 398 } 399 400 return 0; 401 } 402 403 static int 404 enable_fifo(fdc_p fdc) 405 { 406 int i, j; 407 408 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 409 410 /* 411 * XXX: 412 * Cannot use fd_cmd the normal way here, since 413 * this might be an invalid command. Thus we send the 414 * first byte, and check for an early turn of data directon. 415 */ 416 417 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 418 return fdc_err(fdc, "Enable FIFO failed\n"); 419 420 /* If command is invalid, return */ 421 j = FDSTS_TIMEOUT; 422 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 423 != NE7_RQM && j-- > 0) { 424 if (i == (NE7_DIO | NE7_RQM)) { 425 fdc_reset(fdc); 426 return FD_FAILED; 427 } 428 DELAY(1); 429 } 430 if (j<0 || 431 fd_cmd(fdc, 3, 432 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 433 fdc_reset(fdc); 434 return fdc_err(fdc, "Enable FIFO failed\n"); 435 } 436 fdc->flags |= FDC_HAS_FIFO; 437 return 0; 438 } 439 if (fd_cmd(fdc, 4, 440 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 441 return fdc_err(fdc, "Re-enable FIFO failed\n"); 442 return 0; 443 } 444 445 static int 446 fd_sense_drive_status(fdc_p fdc, int *st3p) 447 { 448 int st3; 449 450 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 451 { 452 return fdc_err(fdc, "Sense Drive Status failed\n"); 453 } 454 if (st3p) 455 *st3p = st3; 456 457 return 0; 458 } 459 460 static int 461 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 462 { 463 int cyl, st0, ret; 464 465 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 466 if (ret) { 467 (void)fdc_err(fdc, 468 "sense intr err reading stat reg 0\n"); 469 return ret; 470 } 471 472 if (st0p) 473 *st0p = st0; 474 475 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 476 /* 477 * There doesn't seem to have been an interrupt. 478 */ 479 return FD_NOT_VALID; 480 } 481 482 if (fd_in(fdc, &cyl) < 0) { 483 return fdc_err(fdc, "can't get cyl num\n"); 484 } 485 486 if (cylp) 487 *cylp = cyl; 488 489 return 0; 490 } 491 492 493 static int 494 fd_read_status(fdc_p fdc, int fdsu) 495 { 496 int i, ret; 497 498 for (i = 0; i < 7; i++) { 499 /* 500 * XXX types are poorly chosen. Only bytes can by read 501 * from the hardware, but fdc->status[] wants u_ints and 502 * fd_in() gives ints. 503 */ 504 int status; 505 506 ret = fd_in(fdc, &status); 507 fdc->status[i] = status; 508 if (ret != 0) 509 break; 510 } 511 512 if (ret == 0) 513 fdc->flags |= FDC_STAT_VALID; 514 else 515 fdc->flags &= ~FDC_STAT_VALID; 516 517 return ret; 518 } 519 520 /****************************************************************************/ 521 /* autoconfiguration stuff */ 522 /****************************************************************************/ 523 524 int 525 fdc_alloc_resources(struct fdc_data *fdc) 526 { 527 device_t dev; 528 int ispnp, ispcmcia; 529 530 dev = fdc->fdc_dev; 531 ispnp = (fdc->flags & FDC_ISPNP) != 0; 532 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 533 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 534 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 535 536 /* 537 * On standard ISA, we don't just use an 8 port range 538 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 539 * register at 0x3f6. 540 * 541 * Isn't PC hardware wonderful. 542 * 543 * The Y-E Data PCMCIA FDC doesn't have this problem, it 544 * uses the register with offset 6 for pseudo-DMA, and the 545 * one with offset 7 as control register. 546 */ 547 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 548 &fdc->rid_ioport, 0ul, ~0ul, 549 ispcmcia ? 8 : (ispnp ? 1 : 6), 550 RF_ACTIVE); 551 if (fdc->res_ioport == 0) { 552 device_printf(dev, "cannot reserve I/O port range\n"); 553 return ENXIO; 554 } 555 fdc->portt = rman_get_bustag(fdc->res_ioport); 556 fdc->porth = rman_get_bushandle(fdc->res_ioport); 557 558 if (!ispcmcia) { 559 /* 560 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 561 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 562 * by checking the size and adjust the port address 563 * accordingly. 564 */ 565 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 566 fdc->port_off = -2; 567 568 /* 569 * Register the control port range as rid 1 if it 570 * isn't there already. Most PnP BIOSen will have 571 * already done this but non-PnP configurations don't. 572 * 573 * And some (!!) report 0x3f2-0x3f5 and completely 574 * leave out the control register! It seems that some 575 * non-antique controller chips have a different 576 * method of programming the transfer speed which 577 * doesn't require the control register, but it's 578 * mighty bogus as the chip still responds to the 579 * address for the control register. 580 */ 581 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 582 u_long ctlstart; 583 584 /* Find the control port, usually 0x3f7 */ 585 ctlstart = rman_get_start(fdc->res_ioport) + 586 fdc->port_off + 7; 587 588 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); 589 } 590 591 /* 592 * Now (finally!) allocate the control port. 593 */ 594 fdc->rid_ctl = 1; 595 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 596 &fdc->rid_ctl, 597 0ul, ~0ul, 1, RF_ACTIVE); 598 if (fdc->res_ctl == 0) { 599 device_printf(dev, 600 "cannot reserve control I/O port range\n"); 601 return ENXIO; 602 } 603 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 604 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 605 } 606 607 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 608 &fdc->rid_irq, 0ul, ~0ul, 1, 609 RF_ACTIVE); 610 if (fdc->res_irq == 0) { 611 device_printf(dev, "cannot reserve interrupt line\n"); 612 return ENXIO; 613 } 614 615 if ((fdc->flags & FDC_NODMA) == 0) { 616 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 617 &fdc->rid_drq, 0ul, ~0ul, 1, 618 RF_ACTIVE); 619 if (fdc->res_drq == 0) { 620 device_printf(dev, "cannot reserve DMA request line\n"); 621 return ENXIO; 622 } 623 fdc->dmachan = fdc->res_drq->r_start; 624 } 625 626 return 0; 627 } 628 629 void 630 fdc_release_resources(struct fdc_data *fdc) 631 { 632 device_t dev; 633 634 dev = fdc->fdc_dev; 635 if (fdc->res_irq != 0) { 636 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 637 fdc->res_irq); 638 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 639 fdc->res_irq); 640 } 641 if (fdc->res_ctl != 0) { 642 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 643 fdc->res_ctl); 644 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 645 fdc->res_ctl); 646 } 647 if (fdc->res_ioport != 0) { 648 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 649 fdc->res_ioport); 650 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 651 fdc->res_ioport); 652 } 653 if (fdc->res_drq != 0) { 654 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 655 fdc->res_drq); 656 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 657 fdc->res_drq); 658 } 659 } 660 661 /****************************************************************************/ 662 /* autoconfiguration stuff */ 663 /****************************************************************************/ 664 665 static struct isa_pnp_id fdc_ids[] = { 666 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 667 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 668 {0} 669 }; 670 671 int 672 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result) 673 { 674 struct fdc_ivars *ivars = device_get_ivars(child); 675 676 switch (which) { 677 case FDC_IVAR_FDUNIT: 678 *result = ivars->fdunit; 679 break; 680 default: 681 return ENOENT; 682 } 683 return 0; 684 } 685 686 /* 687 * fdc controller section. 688 */ 689 static int 690 fdc_probe(device_t dev) 691 { 692 int error, ic_type; 693 struct fdc_data *fdc; 694 695 fdc = device_get_softc(dev); 696 bzero(fdc, sizeof *fdc); 697 fdc->fdc_dev = dev; 698 fdc->fdctl_wr = fdctl_wr_isa; 699 700 /* Check pnp ids */ 701 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 702 if (error == ENXIO) 703 return ENXIO; 704 if (error == 0) 705 fdc->flags |= FDC_ISPNP; 706 707 /* Attempt to allocate our resources for the duration of the probe */ 708 error = fdc_alloc_resources(fdc); 709 if (error) 710 goto out; 711 712 /* First - lets reset the floppy controller */ 713 fdout_wr(fdc, 0); 714 DELAY(100); 715 fdout_wr(fdc, FDO_FRST); 716 717 /* see if it can handle a command */ 718 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 719 NE7_SPEC_2(2, 0), 0)) { 720 error = ENXIO; 721 goto out; 722 } 723 724 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 725 ic_type = (u_char)ic_type; 726 switch (ic_type) { 727 case 0x80: 728 device_set_desc(dev, "NEC 765 or clone"); 729 fdc->fdct = FDC_NE765; 730 break; 731 case 0x81: 732 device_set_desc(dev, "Intel 82077 or clone"); 733 fdc->fdct = FDC_I82077; 734 break; 735 case 0x90: 736 device_set_desc(dev, "NEC 72065B or clone"); 737 fdc->fdct = FDC_NE72065; 738 break; 739 default: 740 device_set_desc(dev, "generic floppy controller"); 741 fdc->fdct = FDC_UNKNOWN; 742 break; 743 } 744 } 745 746 out: 747 fdc_release_resources(fdc); 748 return (error); 749 } 750 751 /* 752 * Add a child device to the fdc controller. It will then be probed etc. 753 */ 754 static void 755 fdc_add_child(device_t dev, const char *name, int unit) 756 { 757 int disabled; 758 struct fdc_ivars *ivar; 759 device_t child; 760 761 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO); 762 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 763 ivar->fdunit = 0; 764 child = device_add_child(dev, name, unit); 765 if (child == NULL) 766 return; 767 device_set_ivars(child, ivar); 768 if (resource_int_value(name, unit, "disabled", &disabled) == 0 769 && disabled != 0) 770 device_disable(child); 771 } 772 773 int 774 fdc_attach(device_t dev) 775 { 776 struct fdc_data *fdc; 777 int i, error; 778 779 fdc = device_get_softc(dev); 780 781 callout_init(&fdc->pseudointr_ch); 782 783 error = fdc_alloc_resources(fdc); 784 if (error) { 785 device_printf(dev, "cannot re-aquire resources\n"); 786 return error; 787 } 788 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 789 0, fdc_intr, fdc, 790 &fdc->fdc_intr, NULL); 791 if (error) { 792 device_printf(dev, "cannot setup interrupt\n"); 793 return error; 794 } 795 fdc->fdcu = device_get_unit(dev); 796 fdc->flags |= FDC_ATTACHED; 797 798 if ((fdc->flags & FDC_NODMA) == 0) { 799 /* Acquire the DMA channel forever, The driver will do the rest */ 800 /* XXX should integrate with rman */ 801 isa_dma_acquire(fdc->dmachan); 802 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */); 803 } 804 fdc->state = DEVIDLE; 805 806 /* reset controller, turn motor off, clear fdout mirror reg */ 807 fdout_wr(fdc, ((fdc->fdout = 0))); 808 bioq_init(&fdc->bio_queue); 809 810 /* 811 * Probe and attach any children. We should probably detect 812 * devices from the BIOS unless overridden. 813 */ 814 for (i = resource_query_string(-1, "at", device_get_nameunit(dev)); 815 i != -1; 816 i = resource_query_string(i, "at", device_get_nameunit(dev))) 817 fdc_add_child(dev, resource_query_name(i), 818 resource_query_unit(i)); 819 820 return (bus_generic_attach(dev)); 821 } 822 823 int 824 fdc_print_child(device_t me, device_t child) 825 { 826 int retval = 0; 827 828 retval += bus_print_child_header(me, child); 829 retval += printf(" on %s drive %d\n", device_get_nameunit(me), 830 fdc_get_fdunit(child)); 831 832 return (retval); 833 } 834 835 static device_method_t fdc_methods[] = { 836 /* Device interface */ 837 DEVMETHOD(device_probe, fdc_probe), 838 DEVMETHOD(device_attach, fdc_attach), 839 DEVMETHOD(device_detach, bus_generic_detach), 840 DEVMETHOD(device_shutdown, bus_generic_shutdown), 841 DEVMETHOD(device_suspend, bus_generic_suspend), 842 DEVMETHOD(device_resume, bus_generic_resume), 843 844 /* Bus interface */ 845 DEVMETHOD(bus_print_child, fdc_print_child), 846 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 847 /* Our children never use any other bus interface methods. */ 848 849 { 0, 0 } 850 }; 851 852 static driver_t fdc_driver = { 853 "fdc", 854 fdc_methods, 855 sizeof(struct fdc_data) 856 }; 857 858 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 859 860 /******************************************************************/ 861 /* 862 * devices attached to the controller section. 863 */ 864 static int 865 fd_probe(device_t dev) 866 { 867 int i; 868 u_int fdt, st0, st3; 869 struct fd_data *fd; 870 struct fdc_data *fdc; 871 fdsu_t fdsu; 872 static int fd_fifo = 0; 873 874 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 875 fd = device_get_softc(dev); 876 fdc = device_get_softc(device_get_parent(dev)); 877 878 bzero(fd, sizeof *fd); 879 fd->dev = dev; 880 fd->fdc = fdc; 881 fd->fdsu = fdsu; 882 fd->fdu = device_get_unit(dev); 883 884 #ifdef __i386__ 885 /* look up what bios thinks we have */ 886 switch (fd->fdu) { 887 case 0: 888 if ((fdc->flags & FDC_ISPCMCIA)) 889 fdt = RTCFDT_144M; 890 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0) 891 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED; 892 else 893 fdt = (rtcin(RTC_FDISKETTE) & 0xf0); 894 break; 895 case 1: 896 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0); 897 break; 898 default: 899 fdt = RTCFDT_NONE; 900 break; 901 } 902 #else 903 fdt = RTCFDT_144M; /* XXX probably */ 904 #endif 905 906 /* is there a unit? */ 907 if (fdt == RTCFDT_NONE) 908 return (ENXIO); 909 910 /* select it */ 911 set_motor(fdc, fdsu, TURNON); 912 DELAY(1000000); /* 1 sec */ 913 914 /* XXX This doesn't work before the first set_motor() */ 915 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN 916 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 917 && enable_fifo(fdc) == 0) { 918 device_printf(device_get_parent(dev), 919 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 920 } 921 fd_fifo = 1; 922 923 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) 924 && (st3 & NE7_ST3_T0)) { 925 /* if at track 0, first seek inwards */ 926 /* seek some steps: */ 927 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0); 928 DELAY(300000); /* ...wait a moment... */ 929 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */ 930 } 931 932 /* If we're at track 0 first seek inwards. */ 933 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) { 934 /* Seek some steps... */ 935 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 936 /* ...wait a moment... */ 937 DELAY(300000); 938 /* make ctrlr happy: */ 939 fd_sense_int(fdc, 0, 0); 940 } 941 } 942 943 for (i = 0; i < 2; i++) { 944 /* 945 * we must recalibrate twice, just in case the 946 * heads have been beyond cylinder 76, since most 947 * FDCs still barf when attempting to recalibrate 948 * more than 77 steps 949 */ 950 /* go back to 0: */ 951 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 952 /* a second being enough for full stroke seek*/ 953 DELAY(i == 0 ? 1000000 : 300000); 954 955 /* anything responding? */ 956 if (fd_sense_int(fdc, &st0, 0) == 0 && 957 (st0 & NE7_ST0_EC) == 0) 958 break; /* already probed succesfully */ 959 } 960 } 961 962 set_motor(fdc, fdsu, TURNOFF); 963 964 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */ 965 return (ENXIO); 966 967 fd->track = FD_NO_TRACK; 968 fd->fdc = fdc; 969 fd->fdsu = fdsu; 970 fd->options = 0; 971 callout_init(&fd->toffhandle); 972 callout_init(&fd->tohandle); 973 callout_init(&fd->motor); 974 975 switch (fdt) { 976 case RTCFDT_12M: 977 device_set_desc(dev, "1200-KB 5.25\" drive"); 978 fd->type = FD_1200; 979 break; 980 case RTCFDT_144M | RTCFDT_144M_PRETENDED: 981 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive"); 982 fdt = RTCFDT_144M; 983 fd->type = FD_1440; 984 case RTCFDT_144M: 985 device_set_desc(dev, "1440-KB 3.5\" drive"); 986 fd->type = FD_1440; 987 break; 988 case RTCFDT_288M: 989 case RTCFDT_288M_1: 990 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 991 fd->type = FD_1440; 992 break; 993 case RTCFDT_360K: 994 device_set_desc(dev, "360-KB 5.25\" drive"); 995 fd->type = FD_360; 996 break; 997 case RTCFDT_720K: 998 printf("720-KB 3.5\" drive"); 999 fd->type = FD_720; 1000 break; 1001 default: 1002 return (ENXIO); 1003 } 1004 return (0); 1005 } 1006 1007 static int 1008 fd_attach(device_t dev) 1009 { 1010 struct fd_data *fd; 1011 #if 0 1012 int i; 1013 int mynor; 1014 int typemynor; 1015 int typesize; 1016 #endif 1017 1018 fd = device_get_softc(dev); 1019 1020 dev_ops_add(&fd_ops, -1 << 6, fd->fdu << 6); 1021 make_dev(&fd_ops, (fd->fdu << 6), 1022 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu); 1023 1024 #if 0 1025 /* Other make_dev() go here. */ 1026 #endif 1027 1028 /* 1029 * Export the drive to the devstat interface. 1030 */ 1031 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1032 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS, 1033 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1034 DEVSTAT_PRIORITY_FD); 1035 return (0); 1036 } 1037 1038 static int 1039 fd_detach(device_t dev) 1040 { 1041 struct fd_data *fd; 1042 1043 fd = device_get_softc(dev); 1044 callout_stop(&fd->toffhandle); 1045 callout_stop(&fd->motor); 1046 1047 return (0); 1048 } 1049 1050 static device_method_t fd_methods[] = { 1051 /* Device interface */ 1052 DEVMETHOD(device_probe, fd_probe), 1053 DEVMETHOD(device_attach, fd_attach), 1054 DEVMETHOD(device_detach, fd_detach), 1055 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1056 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1057 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1058 1059 { 0, 0 } 1060 }; 1061 1062 static driver_t fd_driver = { 1063 "fd", 1064 fd_methods, 1065 sizeof(struct fd_data) 1066 }; 1067 1068 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1069 1070 /****************************************************************************/ 1071 /* motor control stuff */ 1072 /* remember to not deselect the drive we're working on */ 1073 /****************************************************************************/ 1074 static void 1075 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1076 { 1077 int fdout = fdc->fdout; 1078 int needspecify = 0; 1079 1080 if(turnon) { 1081 fdout &= ~FDO_FDSEL; 1082 fdout |= (FDO_MOEN0 << fdsu) + fdsu; 1083 } else 1084 fdout &= ~(FDO_MOEN0 << fdsu); 1085 1086 if(!turnon 1087 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0) 1088 /* gonna turn off the last drive, put FDC to bed */ 1089 fdout &= ~ (FDO_FRST|FDO_FDMAEN); 1090 else { 1091 /* make sure controller is selected and specified */ 1092 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0) 1093 needspecify = 1; 1094 fdout |= (FDO_FRST|FDO_FDMAEN); 1095 } 1096 1097 fdout_wr(fdc, fdout); 1098 fdc->fdout = fdout; 1099 TRACE1("[0x%x->FDOUT]", fdout); 1100 1101 if (needspecify) { 1102 /* 1103 * XXX 1104 * special case: since we have just woken up the FDC 1105 * from its sleep, we silently assume the command will 1106 * be accepted, and do not test for a timeout 1107 */ 1108 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1109 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1110 0); 1111 if (fdc->flags & FDC_HAS_FIFO) 1112 (void) enable_fifo(fdc); 1113 } 1114 } 1115 1116 static void 1117 fd_turnoff(void *xfd) 1118 { 1119 fd_p fd = xfd; 1120 1121 TRACE1("[fd%d: turnoff]", fd->fdu); 1122 1123 crit_enter(); 1124 /* 1125 * Don't turn off the motor yet if the drive is active. 1126 * 1127 * If we got here, this could only mean we missed an interrupt. 1128 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1129 * after a controller reset. Just schedule a pseudo-interrupt 1130 * so the state machine gets re-entered. 1131 */ 1132 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1133 fdc_intr(fd->fdc); 1134 crit_exit(); 1135 return; 1136 } 1137 1138 fd->flags &= ~FD_MOTOR; 1139 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1140 crit_exit(); 1141 } 1142 1143 static void 1144 fd_motor_on(void *xfd) 1145 { 1146 fd_p fd = xfd; 1147 1148 crit_enter(); 1149 fd->flags &= ~FD_MOTOR_WAIT; 1150 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1151 { 1152 fdc_intr(fd->fdc); 1153 } 1154 crit_exit(); 1155 } 1156 1157 static void 1158 fd_turnon(fd_p fd) 1159 { 1160 if(!(fd->flags & FD_MOTOR)) 1161 { 1162 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1163 set_motor(fd->fdc, fd->fdsu, TURNON); 1164 callout_reset(&fd->motor, hz, fd_motor_on, fd); 1165 } 1166 } 1167 1168 static void 1169 fdc_reset(fdc_p fdc) 1170 { 1171 /* Try a reset, keep motor on */ 1172 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1173 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1174 DELAY(100); 1175 /* enable FDC, but defer interrupts a moment */ 1176 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1177 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1178 DELAY(100); 1179 fdout_wr(fdc, fdc->fdout); 1180 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1181 1182 /* XXX after a reset, silently believe the FDC will accept commands */ 1183 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1184 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1185 0); 1186 if (fdc->flags & FDC_HAS_FIFO) 1187 (void) enable_fifo(fdc); 1188 } 1189 1190 /****************************************************************************/ 1191 /* fdc in/out */ 1192 /****************************************************************************/ 1193 /* 1194 * FDC IO functions, take care of the main status register, timeout 1195 * in case the desired status bits are never set. 1196 * 1197 * These PIO loops initially start out with short delays between 1198 * each iteration in the expectation that the required condition 1199 * is usually met quickly, so it can be handled immediately. After 1200 * about 1 ms, stepping is increased to achieve a better timing 1201 * accuracy in the calls to DELAY(). 1202 */ 1203 static int 1204 fd_in(struct fdc_data *fdc, int *ptr) 1205 { 1206 int i, j, step; 1207 1208 for (j = 0, step = 1; 1209 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) && 1210 j < FDSTS_TIMEOUT; 1211 j += step) { 1212 if (i == NE7_RQM) 1213 return (fdc_err(fdc, "ready for output in input\n")); 1214 if (j == 1000) 1215 step = 1000; 1216 DELAY(step); 1217 } 1218 if (j >= FDSTS_TIMEOUT) 1219 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); 1220 #ifdef FDC_DEBUG 1221 i = fddata_rd(fdc); 1222 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1223 *ptr = i; 1224 return (0); 1225 #else /* !FDC_DEBUG */ 1226 i = fddata_rd(fdc); 1227 if (ptr) 1228 *ptr = i; 1229 return (0); 1230 #endif /* FDC_DEBUG */ 1231 } 1232 1233 static int 1234 out_fdc(struct fdc_data *fdc, int x) 1235 { 1236 int i, j, step; 1237 1238 for (j = 0, step = 1; 1239 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM && 1240 j < FDSTS_TIMEOUT; 1241 j += step) { 1242 if (i == (NE7_DIO|NE7_RQM)) 1243 return (fdc_err(fdc, "ready for input in output\n")); 1244 if (j == 1000) 1245 step = 1000; 1246 DELAY(step); 1247 } 1248 if (j >= FDSTS_TIMEOUT) 1249 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); 1250 1251 /* Send the command and return */ 1252 fddata_wr(fdc, x); 1253 TRACE1("[0x%x->FDDATA]", x); 1254 return (0); 1255 } 1256 1257 /****************************************************************************/ 1258 /* fdopen/fdclose */ 1259 /****************************************************************************/ 1260 int 1261 Fdopen(struct dev_open_args *ap) 1262 { 1263 dev_t dev = ap->a_head.a_dev; 1264 fdu_t fdu = FDUNIT(minor(dev)); 1265 int type = FDTYPE(minor(dev)); 1266 fd_p fd; 1267 fdc_p fdc; 1268 1269 /* check bounds */ 1270 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1271 return (ENXIO); 1272 fdc = fd->fdc; 1273 if ((fdc == NULL) || (fd->type == NO_TYPE)) 1274 return (ENXIO); 1275 if (type > NUMDENS) 1276 return (ENXIO); 1277 if (type == 0) 1278 type = fd->type; 1279 else { 1280 /* 1281 * For each type of basic drive, make sure we are trying 1282 * to open a type it can do, 1283 */ 1284 if (type != fd->type) { 1285 switch (fd->type) { 1286 case FD_360: 1287 return (ENXIO); 1288 case FD_720: 1289 if ( type != FD_820 1290 && type != FD_800 1291 && type != FD_640 1292 ) 1293 return (ENXIO); 1294 break; 1295 case FD_1200: 1296 switch (type) { 1297 case FD_1480: 1298 type = FD_1480in5_25; 1299 break; 1300 case FD_1440: 1301 type = FD_1440in5_25; 1302 break; 1303 case FD_1232: 1304 break; 1305 case FD_820: 1306 type = FD_820in5_25; 1307 break; 1308 case FD_800: 1309 type = FD_800in5_25; 1310 break; 1311 case FD_720: 1312 type = FD_720in5_25; 1313 break; 1314 case FD_640: 1315 type = FD_640in5_25; 1316 break; 1317 case FD_360: 1318 type = FD_360in5_25; 1319 break; 1320 default: 1321 return(ENXIO); 1322 } 1323 break; 1324 case FD_1440: 1325 if ( type != FD_1720 1326 && type != FD_1480 1327 && type != FD_1200 1328 && type != FD_820 1329 && type != FD_800 1330 && type != FD_720 1331 && type != FD_640 1332 ) 1333 return(ENXIO); 1334 break; 1335 } 1336 } 1337 } 1338 fd->ft = fd_types + type - 1; 1339 fd->flags |= FD_OPEN; 1340 /* 1341 * Clearing the DMA overrun counter at open time is a bit messy. 1342 * Since we're only managing one counter per controller, opening 1343 * the second drive could mess it up. Anyway, if the DMA overrun 1344 * condition is really persistent, it will eventually time out 1345 * still. OTOH, clearing it here will ensure we'll at least start 1346 * trying again after a previous (maybe even long ago) failure. 1347 * Also, this is merely a stop-gap measure only that should not 1348 * happen during normal operation, so we can tolerate it to be a 1349 * bit sloppy about this. 1350 */ 1351 fdc->dma_overruns = 0; 1352 1353 return 0; 1354 } 1355 1356 int 1357 fdclose(struct dev_close_args *ap) 1358 { 1359 dev_t dev = ap->a_head.a_dev; 1360 fdu_t fdu = FDUNIT(minor(dev)); 1361 struct fd_data *fd; 1362 1363 fd = devclass_get_softc(fd_devclass, fdu); 1364 fd->flags &= ~FD_OPEN; 1365 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG); 1366 1367 return (0); 1368 } 1369 1370 /****************************************************************************/ 1371 /* fdstrategy */ 1372 /****************************************************************************/ 1373 int 1374 fdstrategy(struct dev_strategy_args *ap) 1375 { 1376 dev_t dev = ap->a_head.a_dev; 1377 struct bio *bio = ap->a_bio; 1378 struct buf *bp = bio->bio_buf; 1379 unsigned nblocks, blknum, cando; 1380 fdu_t fdu; 1381 fdc_p fdc; 1382 fd_p fd; 1383 size_t fdblk; 1384 1385 fdu = FDUNIT(minor(dev)); 1386 fd = devclass_get_softc(fd_devclass, fdu); 1387 if (fd == 0) 1388 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1389 (u_long)major(dev), (u_long)minor(dev)); 1390 fdc = fd->fdc; 1391 if (fd->type == NO_TYPE) { 1392 bp->b_error = ENXIO; 1393 bp->b_flags |= B_ERROR; 1394 goto bad; 1395 }; 1396 1397 fdblk = 128 << (fd->ft->secsize); 1398 if (bp->b_cmd != BUF_CMD_FORMAT) { 1399 if (bio->bio_offset < 0) { 1400 printf( 1401 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n", 1402 fdu, bio->bio_offset, bp->b_bcount); 1403 bp->b_error = EINVAL; 1404 bp->b_flags |= B_ERROR; 1405 goto bad; 1406 } 1407 if ((bp->b_bcount % fdblk) != 0) { 1408 bp->b_error = EINVAL; 1409 bp->b_flags |= B_ERROR; 1410 goto bad; 1411 } 1412 } 1413 1414 /* 1415 * Set up block calculations. 1416 */ 1417 if (bio->bio_offset > 20000000LL * fdblk) { 1418 /* 1419 * Reject unreasonably high block number, prevent the 1420 * multiplication below from overflowing. 1421 */ 1422 bp->b_error = EINVAL; 1423 bp->b_flags |= B_ERROR; 1424 goto bad; 1425 } 1426 blknum = (unsigned)(bio->bio_offset / fdblk); 1427 nblocks = fd->ft->size; 1428 bp->b_resid = 0; 1429 if (blknum + (bp->b_bcount / fdblk) > nblocks) { 1430 if (blknum <= nblocks) { 1431 cando = (nblocks - blknum) * fdblk; 1432 bp->b_resid = bp->b_bcount - cando; 1433 if (cando == 0) 1434 goto bad; /* not actually bad but EOF */ 1435 } else { 1436 bp->b_error = EINVAL; 1437 bp->b_flags |= B_ERROR; 1438 goto bad; 1439 } 1440 } 1441 crit_enter(); 1442 bio->bio_driver_info = dev; 1443 bioqdisksort(&fdc->bio_queue, bio); 1444 callout_stop(&fd->toffhandle); 1445 1446 /* Tell devstat we are starting on the transaction */ 1447 devstat_start_transaction(&fd->device_stats); 1448 device_busy(fd->dev); 1449 1450 fdstart(fdc); 1451 crit_exit(); 1452 return(0); 1453 1454 bad: 1455 biodone(bio); 1456 return(0); 1457 } 1458 1459 /***************************************************************\ 1460 * fdstart * 1461 * We have just queued something.. if the controller is not busy * 1462 * then simulate the case where it has just finished a command * 1463 * So that it (the interrupt routine) looks on the queue for more* 1464 * work to do and picks up what we just added. * 1465 * If the controller is already busy, we need do nothing, as it * 1466 * will pick up our work when the present work completes * 1467 \***************************************************************/ 1468 static void 1469 fdstart(struct fdc_data *fdc) 1470 { 1471 crit_enter(); 1472 if(fdc->state == DEVIDLE) 1473 { 1474 fdc_intr(fdc); 1475 } 1476 crit_exit(); 1477 } 1478 1479 static void 1480 fd_iotimeout(void *xfdc) 1481 { 1482 fdc_p fdc; 1483 1484 fdc = xfdc; 1485 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1486 1487 /* 1488 * Due to IBM's brain-dead design, the FDC has a faked ready 1489 * signal, hardwired to ready == true. Thus, any command 1490 * issued if there's no diskette in the drive will _never_ 1491 * complete, and must be aborted by resetting the FDC. 1492 * Many thanks, Big Blue! 1493 * The FDC must not be reset directly, since that would 1494 * interfere with the state machine. Instead, pretend that 1495 * the command completed but was invalid. The state machine 1496 * will reset the FDC and retry once. 1497 */ 1498 crit_enter(); 1499 fdc->status[0] = NE7_ST0_IC_IV; 1500 fdc->flags &= ~FDC_STAT_VALID; 1501 fdc->state = IOTIMEDOUT; 1502 fdc_intr(fdc); 1503 crit_exit(); 1504 } 1505 1506 /* just ensure it is running in a critical section */ 1507 static void 1508 fd_pseudointr(void *xfdc) 1509 { 1510 crit_enter(); 1511 fdc_intr(xfdc); 1512 crit_exit(); 1513 } 1514 1515 /***********************************************************************\ 1516 * fdintr * 1517 * keep calling the state machine until it returns a 0 * 1518 * ALWAYS called at SPLBIO * 1519 \***********************************************************************/ 1520 static void 1521 fdc_intr(void *xfdc) 1522 { 1523 fdc_p fdc = xfdc; 1524 while(fdstate(fdc)) 1525 ; 1526 } 1527 1528 /* 1529 * magic pseudo-DMA initialization for YE FDC. Sets count and 1530 * direction 1531 */ 1532 #define SET_BCDR(fdc,wr,cnt,port) \ 1533 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1534 ((cnt)-1) & 0xff); \ 1535 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1536 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1537 1538 /* 1539 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy 1540 */ 1541 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count) 1542 { 1543 u_char *cptr = (u_char *)addr; 1544 1545 if (cmd == BUF_CMD_READ) { 1546 if (fdc->state != PIOREAD) { 1547 fdc->state = PIOREAD; 1548 return(0); 1549 }; 1550 SET_BCDR(fdc, 0, count, 0); 1551 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1552 FDC_YE_DATAPORT, cptr, count); 1553 } else { 1554 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1555 FDC_YE_DATAPORT, cptr, count); 1556 SET_BCDR(fdc, 0, count, 0); 1557 }; 1558 return(1); 1559 } 1560 1561 /***********************************************************************\ 1562 * The controller state machine. * 1563 * if it returns a non zero value, it should be called again immediatly * 1564 \***********************************************************************/ 1565 static int 1566 fdstate(fdc_p fdc) 1567 { 1568 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3; 1569 unsigned blknum = 0, b_cylinder = 0; 1570 fdu_t fdu = fdc->fdu; 1571 fd_p fd; 1572 struct bio *bio; 1573 struct buf *bp; 1574 struct fd_formb *finfo = NULL; 1575 size_t fdblk; 1576 dev_t dev; 1577 1578 bio = fdc->bio; 1579 if (bio == NULL) { 1580 bio = bioq_first(&fdc->bio_queue); 1581 if (bio != NULL) { 1582 bioq_remove(&fdc->bio_queue, bio); 1583 fdc->bio = bio; 1584 } 1585 } 1586 if (bio == NULL) { 1587 /***********************************************\ 1588 * nothing left for this controller to do * 1589 * Force into the IDLE state, * 1590 \***********************************************/ 1591 fdc->state = DEVIDLE; 1592 if (fdc->fd) { 1593 device_printf(fdc->fdc_dev, 1594 "unexpected valid fd pointer\n"); 1595 fdc->fd = (fd_p) 0; 1596 fdc->fdu = -1; 1597 } 1598 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1599 return (0); 1600 } 1601 bp = bio->bio_buf; 1602 dev = bio->bio_driver_info; 1603 1604 fdu = FDUNIT(minor(dev)); 1605 fd = devclass_get_softc(fd_devclass, fdu); 1606 fdblk = 128 << fd->ft->secsize; 1607 if (fdc->fd && (fd != fdc->fd)) 1608 device_printf(fd->dev, "confused fd pointers\n"); 1609 read = (bp->b_cmd == BUF_CMD_READ); 1610 format = (bp->b_cmd == BUF_CMD_FORMAT); 1611 if (format) { 1612 finfo = (struct fd_formb *)bp->b_data; 1613 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 1614 - (char *)finfo; 1615 } 1616 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) { 1617 blknum = (unsigned)(bio->bio_offset / fdblk) + 1618 fd->skip /fdblk; 1619 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 1620 } 1621 TRACE1("fd%d", fdu); 1622 TRACE1("[%s]", fdstates[fdc->state]); 1623 TRACE1("(0x%x)", fd->flags); 1624 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd); 1625 switch (fdc->state) 1626 { 1627 case DEVIDLE: 1628 case FINDWORK: /* we have found new work */ 1629 fdc->retry = 0; 1630 fd->skip = 0; 1631 fdc->fd = fd; 1632 fdc->fdu = fdu; 1633 fdc->fdctl_wr(fdc, fd->ft->trans); 1634 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 1635 /*******************************************************\ 1636 * If the next drive has a motor startup pending, then * 1637 * it will start up in its own good time * 1638 \*******************************************************/ 1639 if(fd->flags & FD_MOTOR_WAIT) { 1640 fdc->state = MOTORWAIT; 1641 return (0); /* come back later */ 1642 } 1643 /*******************************************************\ 1644 * Maybe if it's not starting, it SHOULD be starting * 1645 \*******************************************************/ 1646 if (!(fd->flags & FD_MOTOR)) 1647 { 1648 fdc->state = MOTORWAIT; 1649 fd_turnon(fd); 1650 return (0); 1651 } 1652 else /* at least make sure we are selected */ 1653 { 1654 set_motor(fdc, fd->fdsu, TURNON); 1655 } 1656 if (fdc->flags & FDC_NEEDS_RESET) { 1657 fdc->state = RESETCTLR; 1658 fdc->flags &= ~FDC_NEEDS_RESET; 1659 } else 1660 fdc->state = DOSEEK; 1661 break; 1662 case DOSEEK: 1663 if (b_cylinder == (unsigned)fd->track) 1664 { 1665 fdc->state = SEEKCOMPLETE; 1666 break; 1667 } 1668 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 1669 fd->fdsu, b_cylinder * fd->ft->steptrac, 1670 0)) 1671 { 1672 /* 1673 * seek command not accepted, looks like 1674 * the FDC went off to the Saints... 1675 */ 1676 fdc->retry = 6; /* try a reset */ 1677 return(retrier(fdc)); 1678 } 1679 fd->track = FD_NO_TRACK; 1680 fdc->state = SEEKWAIT; 1681 return(0); /* will return later */ 1682 case SEEKWAIT: 1683 /* allow heads to settle */ 1684 callout_reset(&fdc->pseudointr_ch, hz / 16, 1685 fd_pseudointr, fdc); 1686 fdc->state = SEEKCOMPLETE; 1687 return(0); /* will return later */ 1688 case SEEKCOMPLETE : /* SEEK DONE, START DMA */ 1689 /* Make sure seek really happened*/ 1690 if(fd->track == FD_NO_TRACK) { 1691 int descyl = b_cylinder * fd->ft->steptrac; 1692 do { 1693 /* 1694 * This might be a "ready changed" interrupt, 1695 * which cannot really happen since the 1696 * RDY pin is hardwired to + 5 volts. This 1697 * generally indicates a "bouncing" intr 1698 * line, so do one of the following: 1699 * 1700 * When running on an enhanced FDC that is 1701 * known to not go stuck after responding 1702 * with INVALID, fetch all interrupt states 1703 * until seeing either an INVALID or a 1704 * real interrupt condition. 1705 * 1706 * When running on a dumb old NE765, give 1707 * up immediately. The controller will 1708 * provide up to four dummy RC interrupt 1709 * conditions right after reset (for the 1710 * corresponding four drives), so this is 1711 * our only chance to get notice that it 1712 * was not the FDC that caused the interrupt. 1713 */ 1714 if (fd_sense_int(fdc, &st0, &cyl) 1715 == FD_NOT_VALID) 1716 return 0; 1717 if(fdc->fdct == FDC_NE765 1718 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1719 return 0; /* hope for a real intr */ 1720 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1721 1722 if (0 == descyl) { 1723 int failed = 0; 1724 /* 1725 * seek to cyl 0 requested; make sure we are 1726 * really there 1727 */ 1728 if (fd_sense_drive_status(fdc, &st3)) 1729 failed = 1; 1730 if ((st3 & NE7_ST3_T0) == 0) { 1731 printf( 1732 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 1733 fdu, st3, NE7_ST3BITS); 1734 failed = 1; 1735 } 1736 1737 if (failed) { 1738 if(fdc->retry < 3) 1739 fdc->retry = 3; 1740 return (retrier(fdc)); 1741 } 1742 } 1743 1744 if (cyl != descyl) { 1745 printf( 1746 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 1747 fdu, descyl, cyl, st0); 1748 if (fdc->retry < 3) 1749 fdc->retry = 3; 1750 return (retrier(fdc)); 1751 } 1752 } 1753 1754 fd->track = b_cylinder; 1755 if (!(fdc->flags & FDC_NODMA)) { 1756 isa_dmastart(isa_dmabp(bp), 1757 bp->b_data+fd->skip, 1758 format ? bp->b_bcount : fdblk, fdc->dmachan); 1759 } 1760 sectrac = fd->ft->sectrac; 1761 sec = blknum % (sectrac * fd->ft->heads); 1762 head = sec / sectrac; 1763 sec = sec % sectrac + 1; 1764 fd->hddrv = ((head&1)<<2)+fdu; 1765 1766 if(format || !read) 1767 { 1768 /* make sure the drive is writable */ 1769 if(fd_sense_drive_status(fdc, &st3) != 0) 1770 { 1771 /* stuck controller? */ 1772 if (!(fdc->flags & FDC_NODMA)) 1773 isa_dmadone(isa_dmabp(bp), 1774 bp->b_data + fd->skip, 1775 format ? bp->b_bcount : fdblk, 1776 fdc->dmachan); 1777 fdc->retry = 6; /* reset the beast */ 1778 return (retrier(fdc)); 1779 } 1780 if(st3 & NE7_ST3_WP) 1781 { 1782 /* 1783 * XXX YES! this is ugly. 1784 * in order to force the current operation 1785 * to fail, we will have to fake an FDC 1786 * error - all error handling is done 1787 * by the retrier() 1788 */ 1789 fdc->status[0] = NE7_ST0_IC_AT; 1790 fdc->status[1] = NE7_ST1_NW; 1791 fdc->status[2] = 0; 1792 fdc->status[3] = fd->track; 1793 fdc->status[4] = head; 1794 fdc->status[5] = sec; 1795 fdc->retry = 8; /* break out immediately */ 1796 fdc->state = IOTIMEDOUT; /* not really... */ 1797 return (1); 1798 } 1799 } 1800 1801 if (format) { 1802 if (fdc->flags & FDC_NODMA) { 1803 /* 1804 * This seems to be necessary for 1805 * whatever obscure reason; if we omit 1806 * it, we end up filling the sector ID 1807 * fields of the newly formatted track 1808 * entirely with garbage, causing 1809 * `wrong cylinder' errors all over 1810 * the place when trying to read them 1811 * back. 1812 * 1813 * Umpf. 1814 */ 1815 SET_BCDR(fdc, 1, bp->b_bcount, 0); 1816 1817 (void)fdcpio(fdc,bp->b_cmd, 1818 bp->b_data+fd->skip, 1819 bp->b_bcount); 1820 1821 } 1822 /* formatting */ 1823 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu, 1824 finfo->fd_formb_secshift, 1825 finfo->fd_formb_nsecs, 1826 finfo->fd_formb_gaplen, 1827 finfo->fd_formb_fillbyte, 0)) { 1828 /* controller fell over */ 1829 if (!(fdc->flags & FDC_NODMA)) 1830 isa_dmadone(isa_dmabp(bp), 1831 bp->b_data + fd->skip, 1832 format ? bp->b_bcount : fdblk, 1833 fdc->dmachan); 1834 fdc->retry = 6; 1835 return (retrier(fdc)); 1836 } 1837 } else { 1838 if (fdc->flags & FDC_NODMA) { 1839 /* 1840 * this seems to be necessary even when 1841 * reading data 1842 */ 1843 SET_BCDR(fdc, 1, fdblk, 0); 1844 1845 /* 1846 * perform the write pseudo-DMA before 1847 * the WRITE command is sent 1848 */ 1849 if (!read) 1850 (void)fdcpio(fdc,bp->b_cmd, 1851 bp->b_data+fd->skip, 1852 fdblk); 1853 } 1854 if (fd_cmd(fdc, 9, 1855 (read ? NE7CMD_READ : NE7CMD_WRITE), 1856 head << 2 | fdu, /* head & unit */ 1857 fd->track, /* track */ 1858 head, 1859 sec, /* sector + 1 */ 1860 fd->ft->secsize, /* sector size */ 1861 sectrac, /* sectors/track */ 1862 fd->ft->gap, /* gap size */ 1863 fd->ft->datalen, /* data length */ 1864 0)) { 1865 /* the beast is sleeping again */ 1866 if (!(fdc->flags & FDC_NODMA)) 1867 isa_dmadone(isa_dmabp(bp), 1868 bp->b_data + fd->skip, 1869 format ? bp->b_bcount : fdblk, 1870 fdc->dmachan); 1871 fdc->retry = 6; 1872 return (retrier(fdc)); 1873 } 1874 } 1875 if (fdc->flags & FDC_NODMA) 1876 /* 1877 * if this is a read, then simply await interrupt 1878 * before performing PIO 1879 */ 1880 if (read && !fdcpio(fdc,bp->b_cmd, 1881 bp->b_data+fd->skip,fdblk)) { 1882 callout_reset(&fd->tohandle, hz, 1883 fd_iotimeout, fdc); 1884 return(0); /* will return later */ 1885 }; 1886 1887 /* 1888 * write (or format) operation will fall through and 1889 * await completion interrupt 1890 */ 1891 fdc->state = IOCOMPLETE; 1892 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc); 1893 return (0); /* will return later */ 1894 case PIOREAD: 1895 /* 1896 * actually perform the PIO read. The IOCOMPLETE case 1897 * removes the timeout for us. 1898 */ 1899 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk); 1900 fdc->state = IOCOMPLETE; 1901 /* FALLTHROUGH */ 1902 case IOCOMPLETE: /* IO DONE, post-analyze */ 1903 callout_stop(&fd->tohandle); 1904 1905 if (fd_read_status(fdc, fd->fdsu)) { 1906 if (!(fdc->flags & FDC_NODMA)) { 1907 isa_dmadone(isa_dmabp(bp), 1908 bp->b_data + fd->skip, 1909 format ? bp->b_bcount : fdblk, 1910 fdc->dmachan); 1911 } 1912 if (fdc->retry < 6) 1913 fdc->retry = 6; /* force a reset */ 1914 return (retrier(fdc)); 1915 } 1916 1917 fdc->state = IOTIMEDOUT; 1918 1919 /* FALLTHROUGH */ 1920 1921 case IOTIMEDOUT: 1922 if (!(fdc->flags & FDC_NODMA)) { 1923 isa_dmadone(isa_dmabp(bp), 1924 bp->b_data + fd->skip, 1925 format ? bp->b_bcount : fdblk, fdc->dmachan); 1926 } 1927 if (fdc->status[0] & NE7_ST0_IC) { 1928 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1929 && fdc->status[1] & NE7_ST1_OR) { 1930 /* 1931 * DMA overrun. Someone hogged the bus and 1932 * didn't release it in time for the next 1933 * FDC transfer. 1934 * 1935 * We normally restart this without bumping 1936 * the retry counter. However, in case 1937 * something is seriously messed up (like 1938 * broken hardware), we rather limit the 1939 * number of retries so the IO operation 1940 * doesn't block indefinately. 1941 */ 1942 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 1943 fdc->state = SEEKCOMPLETE; 1944 return (1); 1945 } /* else fall through */ 1946 } 1947 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 1948 && fdc->retry < 6) 1949 fdc->retry = 6; /* force a reset */ 1950 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1951 && fdc->status[2] & NE7_ST2_WC 1952 && fdc->retry < 3) 1953 fdc->retry = 3; /* force recalibrate */ 1954 return (retrier(fdc)); 1955 } 1956 /* All OK */ 1957 /* Operation successful, retry DMA overruns again next time. */ 1958 fdc->dma_overruns = 0; 1959 fd->skip += fdblk; 1960 if (!format && fd->skip < bp->b_bcount - bp->b_resid) { 1961 /* set up next transfer */ 1962 fdc->state = DOSEEK; 1963 } else { 1964 /* ALL DONE */ 1965 fd->skip = 0; 1966 fdc->bio = NULL; 1967 device_unbusy(fd->dev); 1968 devstat_end_transaction_buf(&fd->device_stats, bp); 1969 biodone(bio); 1970 fdc->fd = (fd_p) 0; 1971 fdc->fdu = -1; 1972 fdc->state = FINDWORK; 1973 } 1974 return (1); 1975 case RESETCTLR: 1976 fdc_reset(fdc); 1977 fdc->retry++; 1978 fdc->state = RESETCOMPLETE; 1979 return (0); 1980 case RESETCOMPLETE: 1981 /* 1982 * Discard all the results from the reset so that they 1983 * can't cause an unexpected interrupt later. 1984 */ 1985 for (i = 0; i < 4; i++) 1986 (void)fd_sense_int(fdc, &st0, &cyl); 1987 fdc->state = STARTRECAL; 1988 /* Fall through. */ 1989 case STARTRECAL: 1990 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 1991 /* arrgl */ 1992 fdc->retry = 6; 1993 return (retrier(fdc)); 1994 } 1995 fdc->state = RECALWAIT; 1996 return (0); /* will return later */ 1997 case RECALWAIT: 1998 /* allow heads to settle */ 1999 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc); 2000 fdc->state = RECALCOMPLETE; 2001 return (0); /* will return later */ 2002 case RECALCOMPLETE: 2003 do { 2004 /* 2005 * See SEEKCOMPLETE for a comment on this: 2006 */ 2007 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2008 return 0; 2009 if(fdc->fdct == FDC_NE765 2010 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2011 return 0; /* hope for a real intr */ 2012 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2013 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2014 { 2015 if(fdc->retry > 3) 2016 /* 2017 * a recalibrate from beyond cylinder 77 2018 * will "fail" due to the FDC limitations; 2019 * since people used to complain much about 2020 * the failure message, try not logging 2021 * this one if it seems to be the first 2022 * time in a line 2023 */ 2024 printf("fd%d: recal failed ST0 %b cyl %d\n", 2025 fdu, st0, NE7_ST0BITS, cyl); 2026 if(fdc->retry < 3) fdc->retry = 3; 2027 return (retrier(fdc)); 2028 } 2029 fd->track = 0; 2030 /* Seek (probably) necessary */ 2031 fdc->state = DOSEEK; 2032 return (1); /* will return immediatly */ 2033 case MOTORWAIT: 2034 if(fd->flags & FD_MOTOR_WAIT) 2035 { 2036 return (0); /* time's not up yet */ 2037 } 2038 if (fdc->flags & FDC_NEEDS_RESET) { 2039 fdc->state = RESETCTLR; 2040 fdc->flags &= ~FDC_NEEDS_RESET; 2041 } else { 2042 /* 2043 * If all motors were off, then the controller was 2044 * reset, so it has lost track of the current 2045 * cylinder. Recalibrate to handle this case. 2046 * But first, discard the results of the reset. 2047 */ 2048 fdc->state = RESETCOMPLETE; 2049 } 2050 return (1); /* will return immediatly */ 2051 default: 2052 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2053 if (fd_read_status(fdc, fd->fdsu) == 0) 2054 printf("FDC status :%x %x %x %x %x %x %x ", 2055 fdc->status[0], 2056 fdc->status[1], 2057 fdc->status[2], 2058 fdc->status[3], 2059 fdc->status[4], 2060 fdc->status[5], 2061 fdc->status[6] ); 2062 else 2063 printf("No status available "); 2064 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2065 { 2066 printf("[controller is dead now]\n"); 2067 return (0); 2068 } 2069 printf("ST0 = %x, PCN = %x\n", st0, cyl); 2070 return (0); 2071 } 2072 /*XXX confusing: some branches return immediately, others end up here*/ 2073 return (1); /* Come back immediatly to new state */ 2074 } 2075 2076 static int 2077 retrier(struct fdc_data *fdc) 2078 { 2079 struct bio *bio; 2080 struct buf *bp; 2081 struct fd_data *fd; 2082 dev_t dev; 2083 int fdu; 2084 2085 bio = fdc->bio; 2086 bp = bio->bio_buf; 2087 dev = bio->bio_driver_info; 2088 2089 /* XXX shouldn't this be cached somewhere? */ 2090 fdu = FDUNIT(minor(dev)); 2091 fd = devclass_get_softc(fd_devclass, fdu); 2092 if (fd->options & FDOPT_NORETRY) 2093 goto fail; 2094 2095 switch (fdc->retry) { 2096 case 0: case 1: case 2: 2097 fdc->state = SEEKCOMPLETE; 2098 break; 2099 case 3: case 4: case 5: 2100 fdc->state = STARTRECAL; 2101 break; 2102 case 6: 2103 fdc->state = RESETCTLR; 2104 break; 2105 case 7: 2106 break; 2107 default: 2108 fail: 2109 { 2110 int printerror = (fd->options & FDOPT_NOERRLOG) == 0; 2111 2112 if (printerror) { 2113 /* 2114 * note: use the correct device for more 2115 * verbose error reporting. 2116 */ 2117 dev_t subdev; 2118 2119 subdev = make_sub_dev(dev, 2120 (FDUNIT(minor(dev))<<3)|RAW_PART); 2121 diskerr(bio, subdev, 2122 "hard error", LOG_PRINTF, 2123 fdc->fd->skip, NULL); 2124 } 2125 if (printerror) { 2126 if (fdc->flags & FDC_STAT_VALID) 2127 printf( 2128 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2129 fdc->status[0], NE7_ST0BITS, 2130 fdc->status[1], NE7_ST1BITS, 2131 fdc->status[2], NE7_ST2BITS, 2132 fdc->status[3], fdc->status[4], 2133 fdc->status[5]); 2134 else 2135 printf(" (No status)\n"); 2136 } 2137 } 2138 bp->b_flags |= B_ERROR; 2139 bp->b_error = EIO; 2140 bp->b_resid += bp->b_bcount - fdc->fd->skip; 2141 fdc->bio = NULL; 2142 fdc->fd->skip = 0; 2143 device_unbusy(fd->dev); 2144 devstat_end_transaction_buf(&fdc->fd->device_stats, bp); 2145 biodone(bio); 2146 fdc->state = FINDWORK; 2147 fdc->flags |= FDC_NEEDS_RESET; 2148 fdc->fd = (fd_p) 0; 2149 fdc->fdu = -1; 2150 return (1); 2151 } 2152 fdc->retry++; 2153 return (1); 2154 } 2155 2156 static void 2157 fdformat_wakeup(struct bio *bio) 2158 { 2159 bio->bio_buf->b_cmd = BUF_CMD_DONE; 2160 wakeup(bio); 2161 } 2162 2163 static int 2164 fdformat(dev_t dev, struct fd_formb *finfo, struct ucred *cred) 2165 { 2166 fdu_t fdu; 2167 fd_p fd; 2168 struct buf *bp; 2169 int rv = 0; 2170 size_t fdblk; 2171 2172 fdu = FDUNIT(minor(dev)); 2173 fd = devclass_get_softc(fd_devclass, fdu); 2174 fdblk = 128 << fd->ft->secsize; 2175 2176 /* set up a buffer header for fdstrategy() */ 2177 bp = getpbuf(NULL); 2178 bp->b_cmd = BUF_CMD_FORMAT; 2179 2180 /* 2181 * calculate a fake blkno, so fdstrategy() would initiate a 2182 * seek to the requested cylinder 2183 */ 2184 bp->b_bio1.bio_offset = (off_t)(finfo->cyl * 2185 (fd->ft->sectrac * fd->ft->heads) 2186 + finfo->head * fd->ft->sectrac) * fdblk; 2187 bp->b_bio1.bio_driver_info = dev; 2188 bp->b_bio1.bio_done = fdformat_wakeup; 2189 2190 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; 2191 bp->b_data = (caddr_t)finfo; 2192 2193 /* now do the format */ 2194 dev_dstrategy(dev, &bp->b_bio1); 2195 2196 /* ...and wait for it to complete */ 2197 crit_enter(); 2198 while (bp->b_cmd != BUF_CMD_DONE) { 2199 rv = tsleep(&bp->b_bio1, 0, "fdform", 20 * hz); 2200 if (rv == EWOULDBLOCK) 2201 break; 2202 } 2203 crit_exit(); 2204 2205 if (rv == EWOULDBLOCK) { 2206 /* timed out */ 2207 rv = EIO; 2208 device_unbusy(fd->dev); 2209 biodone(&bp->b_bio1); 2210 } 2211 if (bp->b_flags & B_ERROR) 2212 rv = bp->b_error; 2213 /* 2214 * allow the process to be swapped 2215 */ 2216 relpbuf(bp, NULL); 2217 return rv; 2218 } 2219 2220 /* 2221 * TODO: don't allocate buffer on stack. 2222 */ 2223 2224 static int 2225 fdioctl(struct dev_ioctl_args *ap) 2226 { 2227 dev_t dev = ap->a_head.a_dev; 2228 fdu_t fdu = FDUNIT(minor(dev)); 2229 fd_p fd = devclass_get_softc(fd_devclass, fdu); 2230 size_t fdblk; 2231 2232 struct fd_type *fdt; 2233 struct disklabel *dl; 2234 struct fdc_status *fsp; 2235 char buffer[DEV_BSIZE]; 2236 int error = 0; 2237 2238 fdblk = 128 << fd->ft->secsize; 2239 2240 switch (ap->a_cmd) { 2241 case DIOCGDINFO: 2242 bzero(buffer, sizeof (buffer)); 2243 dl = (struct disklabel *)buffer; 2244 dl->d_secsize = fdblk; 2245 fdt = fd->ft; 2246 dl->d_secpercyl = fdt->size / fdt->tracks; 2247 dl->d_type = DTYPE_FLOPPY; 2248 2249 if (readdisklabel(dev, dl) 2250 == NULL) 2251 error = 0; 2252 else 2253 error = EINVAL; 2254 2255 *(struct disklabel *)ap->a_data = *dl; 2256 break; 2257 2258 case DIOCSDINFO: 2259 if ((ap->a_fflag & FWRITE) == 0) 2260 error = EBADF; 2261 break; 2262 2263 case DIOCWLABEL: 2264 if ((ap->a_fflag & FWRITE) == 0) 2265 error = EBADF; 2266 break; 2267 2268 case DIOCWDINFO: 2269 if ((ap->a_fflag & FWRITE) == 0) { 2270 error = EBADF; 2271 break; 2272 } 2273 2274 dl = (struct disklabel *)ap->a_data; 2275 2276 if ((error = setdisklabel((struct disklabel *)buffer, dl, 2277 (u_long)0)) != 0) 2278 break; 2279 2280 error = writedisklabel(dev, (struct disklabel *)buffer); 2281 break; 2282 case FD_FORM: 2283 if ((ap->a_fflag & FWRITE) == 0) 2284 error = EBADF; /* must be opened for writing */ 2285 else if (((struct fd_formb *)ap->a_data)->format_version != 2286 FD_FORMAT_VERSION) 2287 error = EINVAL; /* wrong version of formatting prog */ 2288 else 2289 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred); 2290 break; 2291 2292 case FD_GTYPE: /* get drive type */ 2293 *(struct fd_type *)ap->a_data = *fd->ft; 2294 break; 2295 2296 case FD_STYPE: /* set drive type */ 2297 /* this is considered harmful; only allow for superuser */ 2298 if (suser_cred(ap->a_cred, 0) != 0) 2299 return EPERM; 2300 *fd->ft = *(struct fd_type *)ap->a_data; 2301 break; 2302 2303 case FD_GOPTS: /* get drive options */ 2304 *(int *)ap->a_data = fd->options; 2305 break; 2306 2307 case FD_SOPTS: /* set drive options */ 2308 fd->options = *(int *)ap->a_data; 2309 break; 2310 2311 case FD_GSTAT: 2312 fsp = (struct fdc_status *)ap->a_data; 2313 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2314 return EINVAL; 2315 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2316 break; 2317 2318 default: 2319 error = ENOTTY; 2320 break; 2321 } 2322 return (error); 2323 } 2324 2325 /* 2326 * Hello emacs, these are the 2327 * Local Variables: 2328 * c-indent-level: 8 2329 * c-continued-statement-offset: 8 2330 * c-continued-brace-offset: 0 2331 * c-brace-offset: -8 2332 * c-brace-imaginary-offset: 0 2333 * c-argdecl-indent: 8 2334 * c-label-offset: -8 2335 * c++-hanging-braces: 1 2336 * c++-access-specifier-offset: -8 2337 * c++-empty-arglist-indent: 8 2338 * c++-friend-offset: 0 2339 * End: 2340 */ 2341