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 1.38 2007/05/19 00:52:00 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/diskslice.h> 69 #include <sys/disklabel.h> 70 #include <sys/devicestat.h> 71 #include <sys/fcntl.h> 72 #include <sys/malloc.h> 73 #include <sys/module.h> 74 #include <sys/proc.h> 75 #include <sys/syslog.h> 76 #include <sys/device.h> 77 #include <sys/bus.h> 78 #include <sys/rman.h> 79 #include <sys/buf2.h> 80 #include <sys/thread2.h> 81 82 #include <machine/clock.h> 83 #include <machine/ioctl_fd.h> 84 #include <machine/stdarg.h> 85 86 #include <bus/isa/isavar.h> 87 #include <bus/isa/isareg.h> 88 #include "fdreg.h" 89 #include "fdc.h" 90 #include <bus/isa/rtc.h> 91 92 /* configuration flags */ 93 #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */ 94 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ 95 96 /* internally used only, not really from CMOS: */ 97 #define RTCFDT_144M_PRETENDED 0x1000 98 99 /* error returns for fd_cmd() */ 100 #define FD_FAILED -1 101 #define FD_NOT_VALID -2 102 #define FDC_ERRMAX 100 /* do not log more */ 103 /* 104 * Stop retrying after this many DMA overruns. Since each retry takes 105 * one revolution, with 300 rpm., 25 retries take approximately 10 106 * seconds which the read attempt will block in case the DMA overrun 107 * is persistent. 108 */ 109 #define FDC_DMAOV_MAX 25 110 111 /* 112 * Timeout value for the PIO loops to wait until the FDC main status 113 * register matches our expectations (request for master, direction 114 * bit). This is supposed to be a number of microseconds, although 115 * timing might actually not be very accurate. 116 * 117 * Timeouts of 100 msec are believed to be required for some broken 118 * (old) hardware. 119 */ 120 #define FDSTS_TIMEOUT 100000 121 122 #define NUMTYPES 17 123 #define NUMDENS (NUMTYPES - 7) 124 125 /* These defines (-1) must match index for fd_types */ 126 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */ 127 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */ 128 #define FD_1720 1 129 #define FD_1480 2 130 #define FD_1440 3 131 #define FD_1200 4 132 #define FD_820 5 133 #define FD_800 6 134 #define FD_720 7 135 #define FD_360 8 136 #define FD_640 9 137 #define FD_1232 10 138 139 #define FD_1480in5_25 11 140 #define FD_1440in5_25 12 141 #define FD_820in5_25 13 142 #define FD_800in5_25 14 143 #define FD_720in5_25 15 144 #define FD_360in5_25 16 145 #define FD_640in5_25 17 146 147 148 static struct fd_type fd_types[NUMTYPES] = 149 { 150 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */ 151 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */ 152 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */ 153 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */ 154 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */ 155 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */ 156 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */ 157 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */ 158 { 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */ 159 { 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */ 160 161 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */ 162 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */ 163 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */ 164 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */ 165 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */ 166 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */ 167 { 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */ 168 }; 169 170 #define DRVS_PER_CTLR 2 /* 2 floppies */ 171 172 /***********************************************************************\ 173 * Per controller structure. * 174 \***********************************************************************/ 175 devclass_t fdc_devclass; 176 177 /***********************************************************************\ 178 * Per drive structure. * 179 * N per controller (DRVS_PER_CTLR) * 180 \***********************************************************************/ 181 struct fd_data { 182 struct fdc_data *fdc; /* pointer to controller structure */ 183 int fdsu; /* this units number on this controller */ 184 int type; /* Drive type (FD_1440...) */ 185 struct fd_type *ft; /* pointer to the type descriptor */ 186 int flags; 187 #define FD_OPEN 0x01 /* it's open */ 188 #define FD_ACTIVE 0x02 /* it's active */ 189 #define FD_MOTOR 0x04 /* motor should be on */ 190 #define FD_MOTOR_WAIT 0x08 /* motor coming up */ 191 int skip; 192 int hddrv; 193 #define FD_NO_TRACK -2 194 int track; /* where we think the head is */ 195 int options; /* user configurable options, see ioctl_fd.h */ 196 struct callout toffhandle; 197 struct callout tohandle; 198 struct callout motor; 199 struct devstat device_stats; 200 device_t dev; 201 fdu_t fdu; 202 }; 203 204 struct fdc_ivars { 205 int fdunit; 206 }; 207 static devclass_t fd_devclass; 208 209 /***********************************************************************\ 210 * Throughout this file the following conventions will be used: * 211 * fd is a pointer to the fd_data struct for the drive in question * 212 * fdc is a pointer to the fdc_data struct for the controller * 213 * fdu is the floppy drive unit number * 214 * fdcu is the floppy controller unit number * 215 * fdsu is the floppy drive unit number on that controller. (sub-unit) * 216 \***********************************************************************/ 217 218 /* internal functions */ 219 static void fdc_intr(void *); 220 static void set_motor(struct fdc_data *, int, int); 221 # define TURNON 1 222 # define TURNOFF 0 223 static timeout_t fd_turnoff; 224 static timeout_t fd_motor_on; 225 static void fd_turnon(struct fd_data *); 226 static void fdc_reset(fdc_p); 227 static int fd_in(struct fdc_data *, int *); 228 static int out_fdc(struct fdc_data *, int); 229 static void fdstart(struct fdc_data *); 230 static timeout_t fd_iotimeout; 231 static timeout_t fd_pseudointr; 232 static int fdstate(struct fdc_data *); 233 static int retrier(struct fdc_data *); 234 static int fdformat(cdev_t, struct fd_formb *, struct ucred *); 235 236 static int enable_fifo(fdc_p fdc); 237 238 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 239 240 241 #define DEVIDLE 0 242 #define FINDWORK 1 243 #define DOSEEK 2 244 #define SEEKCOMPLETE 3 245 #define IOCOMPLETE 4 246 #define RECALCOMPLETE 5 247 #define STARTRECAL 6 248 #define RESETCTLR 7 249 #define SEEKWAIT 8 250 #define RECALWAIT 9 251 #define MOTORWAIT 10 252 #define IOTIMEDOUT 11 253 #define RESETCOMPLETE 12 254 #define PIOREAD 13 255 256 #ifdef FDC_DEBUG 257 static char const * const fdstates[] = 258 { 259 "DEVIDLE", 260 "FINDWORK", 261 "DOSEEK", 262 "SEEKCOMPLETE", 263 "IOCOMPLETE", 264 "RECALCOMPLETE", 265 "STARTRECAL", 266 "RESETCTLR", 267 "SEEKWAIT", 268 "RECALWAIT", 269 "MOTORWAIT", 270 "IOTIMEDOUT", 271 "RESETCOMPLETE", 272 "PIOREAD", 273 }; 274 275 /* CAUTION: fd_debug causes huge amounts of logging output */ 276 static int volatile fd_debug = 0; 277 #define TRACE0(arg) if(fd_debug) kprintf(arg) 278 #define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2) 279 #else /* FDC_DEBUG */ 280 #define TRACE0(arg) 281 #define TRACE1(arg1, arg2) 282 #endif /* FDC_DEBUG */ 283 284 void 285 fdout_wr(fdc_p fdc, u_int8_t v) 286 { 287 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 288 } 289 290 static u_int8_t 291 fdsts_rd(fdc_p fdc) 292 { 293 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 294 } 295 296 static void 297 fddata_wr(fdc_p fdc, u_int8_t v) 298 { 299 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 300 } 301 302 static u_int8_t 303 fddata_rd(fdc_p fdc) 304 { 305 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 306 } 307 308 static void 309 fdctl_wr_isa(fdc_p fdc, u_int8_t v) 310 { 311 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 312 } 313 314 #if 0 315 316 static u_int8_t 317 fdin_rd(fdc_p fdc) 318 { 319 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 320 } 321 322 #endif 323 324 static d_open_t Fdopen; /* NOTE, not fdopen */ 325 static d_close_t fdclose; 326 static d_ioctl_t fdioctl; 327 static d_strategy_t fdstrategy; 328 329 static struct dev_ops fd_ops = { 330 { "fd", FD_CDEV_MAJOR, D_DISK }, 331 .d_open = Fdopen, 332 .d_close = fdclose, 333 .d_read = physread, 334 .d_write = physwrite, 335 .d_ioctl = fdioctl, 336 .d_strategy = fdstrategy, 337 }; 338 339 static int 340 fdc_err(struct fdc_data *fdc, const char *s) 341 { 342 fdc->fdc_errs++; 343 if (s) { 344 if (fdc->fdc_errs < FDC_ERRMAX) 345 device_printf(fdc->fdc_dev, "%s", s); 346 else if (fdc->fdc_errs == FDC_ERRMAX) 347 device_printf(fdc->fdc_dev, "too many errors, not " 348 "logging any more\n"); 349 } 350 351 return FD_FAILED; 352 } 353 354 /* 355 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 356 * Unit number, 357 * # of output bytes, output bytes as ints ..., 358 * # of input bytes, input bytes as ints ... 359 */ 360 int 361 fd_cmd(struct fdc_data *fdc, int n_out, ...) 362 { 363 u_char cmd; 364 int n_in; 365 int n; 366 __va_list ap; 367 368 __va_start(ap, n_out); 369 cmd = (u_char)(__va_arg(ap, int)); 370 __va_end(ap); 371 __va_start(ap, n_out); 372 for (n = 0; n < n_out; n++) 373 { 374 if (out_fdc(fdc, __va_arg(ap, int)) < 0) 375 { 376 char msg[50]; 377 ksnprintf(msg, sizeof(msg), 378 "cmd %x failed at out byte %d of %d\n", 379 cmd, n + 1, n_out); 380 return fdc_err(fdc, msg); 381 } 382 } 383 n_in = __va_arg(ap, int); 384 for (n = 0; n < n_in; n++) 385 { 386 int *ptr = __va_arg(ap, int *); 387 if (fd_in(fdc, ptr) < 0) 388 { 389 char msg[50]; 390 ksnprintf(msg, sizeof(msg), 391 "cmd %02x failed at in byte %d of %d\n", 392 cmd, n + 1, n_in); 393 return fdc_err(fdc, msg); 394 } 395 } 396 397 return 0; 398 } 399 400 static int 401 enable_fifo(fdc_p fdc) 402 { 403 int i, j; 404 405 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 406 407 /* 408 * XXX: 409 * Cannot use fd_cmd the normal way here, since 410 * this might be an invalid command. Thus we send the 411 * first byte, and check for an early turn of data directon. 412 */ 413 414 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 415 return fdc_err(fdc, "Enable FIFO failed\n"); 416 417 /* If command is invalid, return */ 418 j = FDSTS_TIMEOUT; 419 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 420 != NE7_RQM && j-- > 0) { 421 if (i == (NE7_DIO | NE7_RQM)) { 422 fdc_reset(fdc); 423 return FD_FAILED; 424 } 425 DELAY(1); 426 } 427 if (j<0 || 428 fd_cmd(fdc, 3, 429 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 430 fdc_reset(fdc); 431 return fdc_err(fdc, "Enable FIFO failed\n"); 432 } 433 fdc->flags |= FDC_HAS_FIFO; 434 return 0; 435 } 436 if (fd_cmd(fdc, 4, 437 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 438 return fdc_err(fdc, "Re-enable FIFO failed\n"); 439 return 0; 440 } 441 442 static int 443 fd_sense_drive_status(fdc_p fdc, int *st3p) 444 { 445 int st3; 446 447 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 448 { 449 return fdc_err(fdc, "Sense Drive Status failed\n"); 450 } 451 if (st3p) 452 *st3p = st3; 453 454 return 0; 455 } 456 457 static int 458 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 459 { 460 int cyl, st0, ret; 461 462 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 463 if (ret) { 464 (void)fdc_err(fdc, 465 "sense intr err reading stat reg 0\n"); 466 return ret; 467 } 468 469 if (st0p) 470 *st0p = st0; 471 472 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 473 /* 474 * There doesn't seem to have been an interrupt. 475 */ 476 return FD_NOT_VALID; 477 } 478 479 if (fd_in(fdc, &cyl) < 0) { 480 return fdc_err(fdc, "can't get cyl num\n"); 481 } 482 483 if (cylp) 484 *cylp = cyl; 485 486 return 0; 487 } 488 489 490 static int 491 fd_read_status(fdc_p fdc, int fdsu) 492 { 493 int i, ret; 494 495 for (i = 0; i < 7; i++) { 496 /* 497 * XXX types are poorly chosen. Only bytes can by read 498 * from the hardware, but fdc->status[] wants u_ints and 499 * fd_in() gives ints. 500 */ 501 int status; 502 503 ret = fd_in(fdc, &status); 504 fdc->status[i] = status; 505 if (ret != 0) 506 break; 507 } 508 509 if (ret == 0) 510 fdc->flags |= FDC_STAT_VALID; 511 else 512 fdc->flags &= ~FDC_STAT_VALID; 513 514 return ret; 515 } 516 517 /****************************************************************************/ 518 /* autoconfiguration stuff */ 519 /****************************************************************************/ 520 521 int 522 fdc_alloc_resources(struct fdc_data *fdc) 523 { 524 device_t dev; 525 int ispnp, ispcmcia; 526 527 dev = fdc->fdc_dev; 528 ispnp = (fdc->flags & FDC_ISPNP) != 0; 529 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 530 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 531 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 532 533 /* 534 * On standard ISA, we don't just use an 8 port range 535 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 536 * register at 0x3f6. 537 * 538 * Isn't PC hardware wonderful. 539 * 540 * The Y-E Data PCMCIA FDC doesn't have this problem, it 541 * uses the register with offset 6 for pseudo-DMA, and the 542 * one with offset 7 as control register. 543 */ 544 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 545 &fdc->rid_ioport, 0ul, ~0ul, 546 ispcmcia ? 8 : (ispnp ? 1 : 6), 547 RF_ACTIVE); 548 if (fdc->res_ioport == 0) { 549 device_printf(dev, "cannot reserve I/O port range\n"); 550 return ENXIO; 551 } 552 fdc->portt = rman_get_bustag(fdc->res_ioport); 553 fdc->porth = rman_get_bushandle(fdc->res_ioport); 554 555 if (!ispcmcia) { 556 /* 557 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 558 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 559 * by checking the size and adjust the port address 560 * accordingly. 561 */ 562 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 563 fdc->port_off = -2; 564 565 /* 566 * Register the control port range as rid 1 if it 567 * isn't there already. Most PnP BIOSen will have 568 * already done this but non-PnP configurations don't. 569 * 570 * And some (!!) report 0x3f2-0x3f5 and completely 571 * leave out the control register! It seems that some 572 * non-antique controller chips have a different 573 * method of programming the transfer speed which 574 * doesn't require the control register, but it's 575 * mighty bogus as the chip still responds to the 576 * address for the control register. 577 */ 578 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 579 u_long ctlstart; 580 581 /* Find the control port, usually 0x3f7 */ 582 ctlstart = rman_get_start(fdc->res_ioport) + 583 fdc->port_off + 7; 584 585 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); 586 } 587 588 /* 589 * Now (finally!) allocate the control port. 590 */ 591 fdc->rid_ctl = 1; 592 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 593 &fdc->rid_ctl, 594 0ul, ~0ul, 1, RF_ACTIVE); 595 if (fdc->res_ctl == 0) { 596 device_printf(dev, 597 "cannot reserve control I/O port range\n"); 598 return ENXIO; 599 } 600 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 601 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 602 } 603 604 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 605 &fdc->rid_irq, 0ul, ~0ul, 1, 606 RF_ACTIVE); 607 if (fdc->res_irq == 0) { 608 device_printf(dev, "cannot reserve interrupt line\n"); 609 return ENXIO; 610 } 611 612 if ((fdc->flags & FDC_NODMA) == 0) { 613 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 614 &fdc->rid_drq, 0ul, ~0ul, 1, 615 RF_ACTIVE); 616 if (fdc->res_drq == 0) { 617 device_printf(dev, "cannot reserve DMA request line\n"); 618 return ENXIO; 619 } 620 fdc->dmachan = fdc->res_drq->r_start; 621 } 622 623 return 0; 624 } 625 626 void 627 fdc_release_resources(struct fdc_data *fdc) 628 { 629 device_t dev; 630 631 dev = fdc->fdc_dev; 632 if (fdc->res_irq != 0) { 633 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 634 fdc->res_irq); 635 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 636 fdc->res_irq); 637 } 638 if (fdc->res_ctl != 0) { 639 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 640 fdc->res_ctl); 641 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 642 fdc->res_ctl); 643 } 644 if (fdc->res_ioport != 0) { 645 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 646 fdc->res_ioport); 647 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 648 fdc->res_ioport); 649 } 650 if (fdc->res_drq != 0) { 651 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 652 fdc->res_drq); 653 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 654 fdc->res_drq); 655 } 656 } 657 658 /****************************************************************************/ 659 /* autoconfiguration stuff */ 660 /****************************************************************************/ 661 662 static struct isa_pnp_id fdc_ids[] = { 663 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 664 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 665 {0} 666 }; 667 668 int 669 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result) 670 { 671 struct fdc_ivars *ivars = device_get_ivars(child); 672 673 switch (which) { 674 case FDC_IVAR_FDUNIT: 675 *result = ivars->fdunit; 676 break; 677 default: 678 return ENOENT; 679 } 680 return 0; 681 } 682 683 /* 684 * fdc controller section. 685 */ 686 static int 687 fdc_probe(device_t dev) 688 { 689 int error, ic_type; 690 struct fdc_data *fdc; 691 692 fdc = device_get_softc(dev); 693 bzero(fdc, sizeof *fdc); 694 fdc->fdc_dev = dev; 695 fdc->fdctl_wr = fdctl_wr_isa; 696 697 /* Check pnp ids */ 698 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 699 if (error == ENXIO) 700 return ENXIO; 701 if (error == 0) 702 fdc->flags |= FDC_ISPNP; 703 704 /* Attempt to allocate our resources for the duration of the probe */ 705 error = fdc_alloc_resources(fdc); 706 if (error) 707 goto out; 708 709 /* First - lets reset the floppy controller */ 710 fdout_wr(fdc, 0); 711 DELAY(100); 712 fdout_wr(fdc, FDO_FRST); 713 714 /* see if it can handle a command */ 715 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 716 NE7_SPEC_2(2, 0), 0)) { 717 error = ENXIO; 718 goto out; 719 } 720 721 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 722 ic_type = (u_char)ic_type; 723 switch (ic_type) { 724 case 0x80: 725 device_set_desc(dev, "NEC 765 or clone"); 726 fdc->fdct = FDC_NE765; 727 break; 728 case 0x81: 729 device_set_desc(dev, "Intel 82077 or clone"); 730 fdc->fdct = FDC_I82077; 731 break; 732 case 0x90: 733 device_set_desc(dev, "NEC 72065B or clone"); 734 fdc->fdct = FDC_NE72065; 735 break; 736 default: 737 device_set_desc(dev, "generic floppy controller"); 738 fdc->fdct = FDC_UNKNOWN; 739 break; 740 } 741 } 742 743 out: 744 fdc_release_resources(fdc); 745 return (error); 746 } 747 748 /* 749 * Add a child device to the fdc controller. It will then be probed etc. 750 */ 751 static void 752 fdc_add_child(device_t dev, const char *name, int unit) 753 { 754 int disabled; 755 struct fdc_ivars *ivar; 756 device_t child; 757 758 ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO); 759 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 760 ivar->fdunit = 0; 761 child = device_add_child(dev, name, unit); 762 if (child == NULL) 763 return; 764 device_set_ivars(child, ivar); 765 if (resource_int_value(name, unit, "disabled", &disabled) == 0 766 && disabled != 0) 767 device_disable(child); 768 } 769 770 int 771 fdc_attach(device_t dev) 772 { 773 struct fdc_data *fdc; 774 int i, error; 775 776 fdc = device_get_softc(dev); 777 778 callout_init(&fdc->pseudointr_ch); 779 780 error = fdc_alloc_resources(fdc); 781 if (error) { 782 device_printf(dev, "cannot re-aquire resources\n"); 783 return error; 784 } 785 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 786 0, fdc_intr, fdc, 787 &fdc->fdc_intr, NULL); 788 if (error) { 789 device_printf(dev, "cannot setup interrupt\n"); 790 return error; 791 } 792 fdc->fdcu = device_get_unit(dev); 793 fdc->flags |= FDC_ATTACHED; 794 795 if ((fdc->flags & FDC_NODMA) == 0) { 796 /* Acquire the DMA channel forever, The driver will do the rest */ 797 /* XXX should integrate with rman */ 798 isa_dma_acquire(fdc->dmachan); 799 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */); 800 } 801 fdc->state = DEVIDLE; 802 803 /* reset controller, turn motor off, clear fdout mirror reg */ 804 fdout_wr(fdc, ((fdc->fdout = 0))); 805 bioq_init(&fdc->bio_queue); 806 807 /* 808 * Probe and attach any children. We should probably detect 809 * devices from the BIOS unless overridden. 810 */ 811 for (i = resource_query_string(-1, "at", device_get_nameunit(dev)); 812 i != -1; 813 i = resource_query_string(i, "at", device_get_nameunit(dev))) 814 fdc_add_child(dev, resource_query_name(i), 815 resource_query_unit(i)); 816 817 return (bus_generic_attach(dev)); 818 } 819 820 int 821 fdc_print_child(device_t me, device_t child) 822 { 823 int retval = 0; 824 825 retval += bus_print_child_header(me, child); 826 retval += kprintf(" on %s drive %d\n", device_get_nameunit(me), 827 fdc_get_fdunit(child)); 828 829 return (retval); 830 } 831 832 static device_method_t fdc_methods[] = { 833 /* Device interface */ 834 DEVMETHOD(device_probe, fdc_probe), 835 DEVMETHOD(device_attach, fdc_attach), 836 DEVMETHOD(device_detach, bus_generic_detach), 837 DEVMETHOD(device_shutdown, bus_generic_shutdown), 838 DEVMETHOD(device_suspend, bus_generic_suspend), 839 DEVMETHOD(device_resume, bus_generic_resume), 840 841 /* Bus interface */ 842 DEVMETHOD(bus_print_child, fdc_print_child), 843 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 844 /* Our children never use any other bus interface methods. */ 845 846 { 0, 0 } 847 }; 848 849 static driver_t fdc_driver = { 850 "fdc", 851 fdc_methods, 852 sizeof(struct fdc_data) 853 }; 854 855 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 856 857 /******************************************************************/ 858 /* 859 * devices attached to the controller section. 860 */ 861 static int 862 fd_probe(device_t dev) 863 { 864 int i; 865 u_int fdt, st0, st3; 866 struct fd_data *fd; 867 struct fdc_data *fdc; 868 fdsu_t fdsu; 869 static int fd_fifo = 0; 870 871 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 872 fd = device_get_softc(dev); 873 fdc = device_get_softc(device_get_parent(dev)); 874 875 bzero(fd, sizeof *fd); 876 fd->dev = dev; 877 fd->fdc = fdc; 878 fd->fdsu = fdsu; 879 fd->fdu = device_get_unit(dev); 880 881 #ifdef __i386__ 882 /* look up what bios thinks we have */ 883 switch (fd->fdu) { 884 case 0: 885 if ((fdc->flags & FDC_ISPCMCIA)) 886 fdt = RTCFDT_144M; 887 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0) 888 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED; 889 else 890 fdt = (rtcin(RTC_FDISKETTE) & 0xf0); 891 break; 892 case 1: 893 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0); 894 break; 895 default: 896 fdt = RTCFDT_NONE; 897 break; 898 } 899 #else 900 fdt = RTCFDT_144M; /* XXX probably */ 901 #endif 902 903 /* is there a unit? */ 904 if (fdt == RTCFDT_NONE) 905 return (ENXIO); 906 907 /* select it */ 908 set_motor(fdc, fdsu, TURNON); 909 DELAY(1000000); /* 1 sec */ 910 911 /* XXX This doesn't work before the first set_motor() */ 912 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN 913 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 914 && enable_fifo(fdc) == 0) { 915 device_printf(device_get_parent(dev), 916 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 917 } 918 fd_fifo = 1; 919 920 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) 921 && (st3 & NE7_ST3_T0)) { 922 /* if at track 0, first seek inwards */ 923 /* seek some steps: */ 924 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0); 925 DELAY(300000); /* ...wait a moment... */ 926 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */ 927 } 928 929 /* If we're at track 0 first seek inwards. */ 930 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) { 931 /* Seek some steps... */ 932 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 933 /* ...wait a moment... */ 934 DELAY(300000); 935 /* make ctrlr happy: */ 936 fd_sense_int(fdc, 0, 0); 937 } 938 } 939 940 for (i = 0; i < 2; i++) { 941 /* 942 * we must recalibrate twice, just in case the 943 * heads have been beyond cylinder 76, since most 944 * FDCs still barf when attempting to recalibrate 945 * more than 77 steps 946 */ 947 /* go back to 0: */ 948 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 949 /* a second being enough for full stroke seek*/ 950 DELAY(i == 0 ? 1000000 : 300000); 951 952 /* anything responding? */ 953 if (fd_sense_int(fdc, &st0, 0) == 0 && 954 (st0 & NE7_ST0_EC) == 0) 955 break; /* already probed succesfully */ 956 } 957 } 958 959 set_motor(fdc, fdsu, TURNOFF); 960 961 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */ 962 return (ENXIO); 963 964 fd->track = FD_NO_TRACK; 965 fd->fdc = fdc; 966 fd->fdsu = fdsu; 967 fd->options = 0; 968 callout_init(&fd->toffhandle); 969 callout_init(&fd->tohandle); 970 callout_init(&fd->motor); 971 972 switch (fdt) { 973 case RTCFDT_12M: 974 device_set_desc(dev, "1200-KB 5.25\" drive"); 975 fd->type = FD_1200; 976 break; 977 case RTCFDT_144M | RTCFDT_144M_PRETENDED: 978 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive"); 979 fdt = RTCFDT_144M; 980 fd->type = FD_1440; 981 case RTCFDT_144M: 982 device_set_desc(dev, "1440-KB 3.5\" drive"); 983 fd->type = FD_1440; 984 break; 985 case RTCFDT_288M: 986 case RTCFDT_288M_1: 987 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 988 fd->type = FD_1440; 989 break; 990 case RTCFDT_360K: 991 device_set_desc(dev, "360-KB 5.25\" drive"); 992 fd->type = FD_360; 993 break; 994 case RTCFDT_720K: 995 kprintf("720-KB 3.5\" drive"); 996 fd->type = FD_720; 997 break; 998 default: 999 return (ENXIO); 1000 } 1001 return (0); 1002 } 1003 1004 static int 1005 fd_attach(device_t dev) 1006 { 1007 struct fd_data *fd; 1008 #if 0 1009 int i; 1010 int mynor; 1011 int typemynor; 1012 int typesize; 1013 #endif 1014 1015 fd = device_get_softc(dev); 1016 1017 dev_ops_add(&fd_ops, -1 << 6, fd->fdu << 6); 1018 make_dev(&fd_ops, (fd->fdu << 6), 1019 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu); 1020 1021 #if 0 1022 /* Other make_dev() go here. */ 1023 #endif 1024 1025 /* 1026 * Export the drive to the devstat interface. 1027 */ 1028 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1029 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS, 1030 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1031 DEVSTAT_PRIORITY_FD); 1032 return (0); 1033 } 1034 1035 static int 1036 fd_detach(device_t dev) 1037 { 1038 struct fd_data *fd; 1039 1040 fd = device_get_softc(dev); 1041 callout_stop(&fd->toffhandle); 1042 callout_stop(&fd->motor); 1043 1044 return (0); 1045 } 1046 1047 static device_method_t fd_methods[] = { 1048 /* Device interface */ 1049 DEVMETHOD(device_probe, fd_probe), 1050 DEVMETHOD(device_attach, fd_attach), 1051 DEVMETHOD(device_detach, fd_detach), 1052 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1053 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1054 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1055 1056 { 0, 0 } 1057 }; 1058 1059 static driver_t fd_driver = { 1060 "fd", 1061 fd_methods, 1062 sizeof(struct fd_data) 1063 }; 1064 1065 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1066 1067 /****************************************************************************/ 1068 /* motor control stuff */ 1069 /* remember to not deselect the drive we're working on */ 1070 /****************************************************************************/ 1071 static void 1072 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1073 { 1074 int fdout = fdc->fdout; 1075 int needspecify = 0; 1076 1077 if(turnon) { 1078 fdout &= ~FDO_FDSEL; 1079 fdout |= (FDO_MOEN0 << fdsu) + fdsu; 1080 } else 1081 fdout &= ~(FDO_MOEN0 << fdsu); 1082 1083 if(!turnon 1084 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0) 1085 /* gonna turn off the last drive, put FDC to bed */ 1086 fdout &= ~ (FDO_FRST|FDO_FDMAEN); 1087 else { 1088 /* make sure controller is selected and specified */ 1089 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0) 1090 needspecify = 1; 1091 fdout |= (FDO_FRST|FDO_FDMAEN); 1092 } 1093 1094 fdout_wr(fdc, fdout); 1095 fdc->fdout = fdout; 1096 TRACE1("[0x%x->FDOUT]", fdout); 1097 1098 if (needspecify) { 1099 /* 1100 * XXX 1101 * special case: since we have just woken up the FDC 1102 * from its sleep, we silently assume the command will 1103 * be accepted, and do not test for a timeout 1104 */ 1105 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1106 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1107 0); 1108 if (fdc->flags & FDC_HAS_FIFO) 1109 (void) enable_fifo(fdc); 1110 } 1111 } 1112 1113 static void 1114 fd_turnoff(void *xfd) 1115 { 1116 fd_p fd = xfd; 1117 1118 TRACE1("[fd%d: turnoff]", fd->fdu); 1119 1120 crit_enter(); 1121 /* 1122 * Don't turn off the motor yet if the drive is active. 1123 * 1124 * If we got here, this could only mean we missed an interrupt. 1125 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1126 * after a controller reset. Just schedule a pseudo-interrupt 1127 * so the state machine gets re-entered. 1128 */ 1129 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1130 fdc_intr(fd->fdc); 1131 crit_exit(); 1132 return; 1133 } 1134 1135 fd->flags &= ~FD_MOTOR; 1136 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1137 crit_exit(); 1138 } 1139 1140 static void 1141 fd_motor_on(void *xfd) 1142 { 1143 fd_p fd = xfd; 1144 1145 crit_enter(); 1146 fd->flags &= ~FD_MOTOR_WAIT; 1147 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1148 { 1149 fdc_intr(fd->fdc); 1150 } 1151 crit_exit(); 1152 } 1153 1154 static void 1155 fd_turnon(fd_p fd) 1156 { 1157 if(!(fd->flags & FD_MOTOR)) 1158 { 1159 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1160 set_motor(fd->fdc, fd->fdsu, TURNON); 1161 callout_reset(&fd->motor, hz, fd_motor_on, fd); 1162 } 1163 } 1164 1165 static void 1166 fdc_reset(fdc_p fdc) 1167 { 1168 /* Try a reset, keep motor on */ 1169 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1170 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1171 DELAY(100); 1172 /* enable FDC, but defer interrupts a moment */ 1173 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1174 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1175 DELAY(100); 1176 fdout_wr(fdc, fdc->fdout); 1177 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1178 1179 /* XXX after a reset, silently believe the FDC will accept commands */ 1180 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1181 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1182 0); 1183 if (fdc->flags & FDC_HAS_FIFO) 1184 (void) enable_fifo(fdc); 1185 } 1186 1187 /****************************************************************************/ 1188 /* fdc in/out */ 1189 /****************************************************************************/ 1190 /* 1191 * FDC IO functions, take care of the main status register, timeout 1192 * in case the desired status bits are never set. 1193 * 1194 * These PIO loops initially start out with short delays between 1195 * each iteration in the expectation that the required condition 1196 * is usually met quickly, so it can be handled immediately. After 1197 * about 1 ms, stepping is increased to achieve a better timing 1198 * accuracy in the calls to DELAY(). 1199 */ 1200 static int 1201 fd_in(struct fdc_data *fdc, int *ptr) 1202 { 1203 int i, j, step; 1204 1205 for (j = 0, step = 1; 1206 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) && 1207 j < FDSTS_TIMEOUT; 1208 j += step) { 1209 if (i == NE7_RQM) 1210 return (fdc_err(fdc, "ready for output in input\n")); 1211 if (j == 1000) 1212 step = 1000; 1213 DELAY(step); 1214 } 1215 if (j >= FDSTS_TIMEOUT) 1216 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); 1217 #ifdef FDC_DEBUG 1218 i = fddata_rd(fdc); 1219 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1220 *ptr = i; 1221 return (0); 1222 #else /* !FDC_DEBUG */ 1223 i = fddata_rd(fdc); 1224 if (ptr) 1225 *ptr = i; 1226 return (0); 1227 #endif /* FDC_DEBUG */ 1228 } 1229 1230 static int 1231 out_fdc(struct fdc_data *fdc, int x) 1232 { 1233 int i, j, step; 1234 1235 for (j = 0, step = 1; 1236 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM && 1237 j < FDSTS_TIMEOUT; 1238 j += step) { 1239 if (i == (NE7_DIO|NE7_RQM)) 1240 return (fdc_err(fdc, "ready for input in output\n")); 1241 if (j == 1000) 1242 step = 1000; 1243 DELAY(step); 1244 } 1245 if (j >= FDSTS_TIMEOUT) 1246 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); 1247 1248 /* Send the command and return */ 1249 fddata_wr(fdc, x); 1250 TRACE1("[0x%x->FDDATA]", x); 1251 return (0); 1252 } 1253 1254 /****************************************************************************/ 1255 /* fdopen/fdclose */ 1256 /****************************************************************************/ 1257 int 1258 Fdopen(struct dev_open_args *ap) 1259 { 1260 cdev_t dev = ap->a_head.a_dev; 1261 fdu_t fdu = FDUNIT(minor(dev)); 1262 int type = FDTYPE(minor(dev)); 1263 fd_p fd; 1264 fdc_p fdc; 1265 1266 /* check bounds */ 1267 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1268 return (ENXIO); 1269 fdc = fd->fdc; 1270 if ((fdc == NULL) || (fd->type == NO_TYPE)) 1271 return (ENXIO); 1272 if (type > NUMDENS) 1273 return (ENXIO); 1274 if (type == 0) 1275 type = fd->type; 1276 else { 1277 /* 1278 * For each type of basic drive, make sure we are trying 1279 * to open a type it can do, 1280 */ 1281 if (type != fd->type) { 1282 switch (fd->type) { 1283 case FD_360: 1284 return (ENXIO); 1285 case FD_720: 1286 if ( type != FD_820 1287 && type != FD_800 1288 && type != FD_640 1289 ) 1290 return (ENXIO); 1291 break; 1292 case FD_1200: 1293 switch (type) { 1294 case FD_1480: 1295 type = FD_1480in5_25; 1296 break; 1297 case FD_1440: 1298 type = FD_1440in5_25; 1299 break; 1300 case FD_1232: 1301 break; 1302 case FD_820: 1303 type = FD_820in5_25; 1304 break; 1305 case FD_800: 1306 type = FD_800in5_25; 1307 break; 1308 case FD_720: 1309 type = FD_720in5_25; 1310 break; 1311 case FD_640: 1312 type = FD_640in5_25; 1313 break; 1314 case FD_360: 1315 type = FD_360in5_25; 1316 break; 1317 default: 1318 return(ENXIO); 1319 } 1320 break; 1321 case FD_1440: 1322 if ( type != FD_1720 1323 && type != FD_1480 1324 && type != FD_1200 1325 && type != FD_820 1326 && type != FD_800 1327 && type != FD_720 1328 && type != FD_640 1329 ) 1330 return(ENXIO); 1331 break; 1332 } 1333 } 1334 } 1335 fd->ft = fd_types + type - 1; 1336 fd->flags |= FD_OPEN; 1337 /* 1338 * Clearing the DMA overrun counter at open time is a bit messy. 1339 * Since we're only managing one counter per controller, opening 1340 * the second drive could mess it up. Anyway, if the DMA overrun 1341 * condition is really persistent, it will eventually time out 1342 * still. OTOH, clearing it here will ensure we'll at least start 1343 * trying again after a previous (maybe even long ago) failure. 1344 * Also, this is merely a stop-gap measure only that should not 1345 * happen during normal operation, so we can tolerate it to be a 1346 * bit sloppy about this. 1347 */ 1348 fdc->dma_overruns = 0; 1349 1350 return 0; 1351 } 1352 1353 int 1354 fdclose(struct dev_close_args *ap) 1355 { 1356 cdev_t dev = ap->a_head.a_dev; 1357 fdu_t fdu = FDUNIT(minor(dev)); 1358 struct fd_data *fd; 1359 1360 fd = devclass_get_softc(fd_devclass, fdu); 1361 fd->flags &= ~FD_OPEN; 1362 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG); 1363 1364 return (0); 1365 } 1366 1367 /****************************************************************************/ 1368 /* fdstrategy */ 1369 /****************************************************************************/ 1370 int 1371 fdstrategy(struct dev_strategy_args *ap) 1372 { 1373 cdev_t dev = ap->a_head.a_dev; 1374 struct bio *bio = ap->a_bio; 1375 struct buf *bp = bio->bio_buf; 1376 unsigned nblocks, blknum, cando; 1377 fdu_t fdu; 1378 fdc_p fdc; 1379 fd_p fd; 1380 size_t fdblk; 1381 1382 fdu = FDUNIT(minor(dev)); 1383 fd = devclass_get_softc(fd_devclass, fdu); 1384 if (fd == 0) 1385 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1386 (u_long)major(dev), (u_long)minor(dev)); 1387 fdc = fd->fdc; 1388 if (fd->type == NO_TYPE) { 1389 bp->b_error = ENXIO; 1390 bp->b_flags |= B_ERROR; 1391 goto bad; 1392 }; 1393 1394 fdblk = 128 << (fd->ft->secsize); 1395 if (bp->b_cmd != BUF_CMD_FORMAT) { 1396 if (bio->bio_offset < 0) { 1397 kprintf( 1398 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n", 1399 fdu, bio->bio_offset, bp->b_bcount); 1400 bp->b_error = EINVAL; 1401 bp->b_flags |= B_ERROR; 1402 goto bad; 1403 } 1404 if ((bp->b_bcount % fdblk) != 0) { 1405 bp->b_error = EINVAL; 1406 bp->b_flags |= B_ERROR; 1407 goto bad; 1408 } 1409 } 1410 1411 /* 1412 * Set up block calculations. 1413 */ 1414 if (bio->bio_offset > 20000000LL * fdblk) { 1415 /* 1416 * Reject unreasonably high block number, prevent the 1417 * multiplication below from overflowing. 1418 */ 1419 bp->b_error = EINVAL; 1420 bp->b_flags |= B_ERROR; 1421 goto bad; 1422 } 1423 blknum = (unsigned)(bio->bio_offset / fdblk); 1424 nblocks = fd->ft->size; 1425 bp->b_resid = 0; 1426 if (blknum + (bp->b_bcount / fdblk) > nblocks) { 1427 if (blknum <= nblocks) { 1428 cando = (nblocks - blknum) * fdblk; 1429 bp->b_resid = bp->b_bcount - cando; 1430 if (cando == 0) 1431 goto bad; /* not actually bad but EOF */ 1432 } else { 1433 bp->b_error = EINVAL; 1434 bp->b_flags |= B_ERROR; 1435 goto bad; 1436 } 1437 } 1438 crit_enter(); 1439 bio->bio_driver_info = dev; 1440 bioqdisksort(&fdc->bio_queue, bio); 1441 callout_stop(&fd->toffhandle); 1442 1443 /* Tell devstat we are starting on the transaction */ 1444 devstat_start_transaction(&fd->device_stats); 1445 device_busy(fd->dev); 1446 1447 fdstart(fdc); 1448 crit_exit(); 1449 return(0); 1450 1451 bad: 1452 biodone(bio); 1453 return(0); 1454 } 1455 1456 /***************************************************************\ 1457 * fdstart * 1458 * We have just queued something.. if the controller is not busy * 1459 * then simulate the case where it has just finished a command * 1460 * So that it (the interrupt routine) looks on the queue for more* 1461 * work to do and picks up what we just added. * 1462 * If the controller is already busy, we need do nothing, as it * 1463 * will pick up our work when the present work completes * 1464 \***************************************************************/ 1465 static void 1466 fdstart(struct fdc_data *fdc) 1467 { 1468 crit_enter(); 1469 if(fdc->state == DEVIDLE) 1470 { 1471 fdc_intr(fdc); 1472 } 1473 crit_exit(); 1474 } 1475 1476 static void 1477 fd_iotimeout(void *xfdc) 1478 { 1479 fdc_p fdc; 1480 1481 fdc = xfdc; 1482 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1483 1484 /* 1485 * Due to IBM's brain-dead design, the FDC has a faked ready 1486 * signal, hardwired to ready == true. Thus, any command 1487 * issued if there's no diskette in the drive will _never_ 1488 * complete, and must be aborted by resetting the FDC. 1489 * Many thanks, Big Blue! 1490 * The FDC must not be reset directly, since that would 1491 * interfere with the state machine. Instead, pretend that 1492 * the command completed but was invalid. The state machine 1493 * will reset the FDC and retry once. 1494 */ 1495 crit_enter(); 1496 fdc->status[0] = NE7_ST0_IC_IV; 1497 fdc->flags &= ~FDC_STAT_VALID; 1498 fdc->state = IOTIMEDOUT; 1499 fdc_intr(fdc); 1500 crit_exit(); 1501 } 1502 1503 /* just ensure it is running in a critical section */ 1504 static void 1505 fd_pseudointr(void *xfdc) 1506 { 1507 crit_enter(); 1508 fdc_intr(xfdc); 1509 crit_exit(); 1510 } 1511 1512 /***********************************************************************\ 1513 * fdintr * 1514 * keep calling the state machine until it returns a 0 * 1515 * ALWAYS called at SPLBIO * 1516 \***********************************************************************/ 1517 static void 1518 fdc_intr(void *xfdc) 1519 { 1520 fdc_p fdc = xfdc; 1521 while(fdstate(fdc)) 1522 ; 1523 } 1524 1525 /* 1526 * magic pseudo-DMA initialization for YE FDC. Sets count and 1527 * direction 1528 */ 1529 #define SET_BCDR(fdc,wr,cnt,port) \ 1530 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1531 ((cnt)-1) & 0xff); \ 1532 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1533 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1534 1535 /* 1536 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy 1537 */ 1538 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count) 1539 { 1540 u_char *cptr = (u_char *)addr; 1541 1542 if (cmd == BUF_CMD_READ) { 1543 if (fdc->state != PIOREAD) { 1544 fdc->state = PIOREAD; 1545 return(0); 1546 }; 1547 SET_BCDR(fdc, 0, count, 0); 1548 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1549 FDC_YE_DATAPORT, cptr, count); 1550 } else { 1551 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1552 FDC_YE_DATAPORT, cptr, count); 1553 SET_BCDR(fdc, 0, count, 0); 1554 }; 1555 return(1); 1556 } 1557 1558 /***********************************************************************\ 1559 * The controller state machine. * 1560 * if it returns a non zero value, it should be called again immediatly * 1561 \***********************************************************************/ 1562 static int 1563 fdstate(fdc_p fdc) 1564 { 1565 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3; 1566 unsigned blknum = 0, b_cylinder = 0; 1567 fdu_t fdu = fdc->fdu; 1568 fd_p fd; 1569 struct bio *bio; 1570 struct buf *bp; 1571 struct fd_formb *finfo = NULL; 1572 size_t fdblk; 1573 cdev_t dev; 1574 1575 bio = fdc->bio; 1576 if (bio == NULL) { 1577 bio = bioq_first(&fdc->bio_queue); 1578 if (bio != NULL) { 1579 bioq_remove(&fdc->bio_queue, bio); 1580 fdc->bio = bio; 1581 } 1582 } 1583 if (bio == NULL) { 1584 /***********************************************\ 1585 * nothing left for this controller to do * 1586 * Force into the IDLE state, * 1587 \***********************************************/ 1588 fdc->state = DEVIDLE; 1589 if (fdc->fd) { 1590 device_printf(fdc->fdc_dev, 1591 "unexpected valid fd pointer\n"); 1592 fdc->fd = (fd_p) 0; 1593 fdc->fdu = -1; 1594 } 1595 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1596 return (0); 1597 } 1598 bp = bio->bio_buf; 1599 dev = bio->bio_driver_info; 1600 1601 fdu = FDUNIT(minor(dev)); 1602 fd = devclass_get_softc(fd_devclass, fdu); 1603 fdblk = 128 << fd->ft->secsize; 1604 if (fdc->fd && (fd != fdc->fd)) 1605 device_printf(fd->dev, "confused fd pointers\n"); 1606 read = (bp->b_cmd == BUF_CMD_READ); 1607 format = (bp->b_cmd == BUF_CMD_FORMAT); 1608 if (format) { 1609 finfo = (struct fd_formb *)bp->b_data; 1610 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 1611 - (char *)finfo; 1612 } 1613 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) { 1614 blknum = (unsigned)(bio->bio_offset / fdblk) + 1615 fd->skip /fdblk; 1616 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 1617 } 1618 TRACE1("fd%d", fdu); 1619 TRACE1("[%s]", fdstates[fdc->state]); 1620 TRACE1("(0x%x)", fd->flags); 1621 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd); 1622 switch (fdc->state) 1623 { 1624 case DEVIDLE: 1625 case FINDWORK: /* we have found new work */ 1626 fdc->retry = 0; 1627 fd->skip = 0; 1628 fdc->fd = fd; 1629 fdc->fdu = fdu; 1630 fdc->fdctl_wr(fdc, fd->ft->trans); 1631 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 1632 /*******************************************************\ 1633 * If the next drive has a motor startup pending, then * 1634 * it will start up in its own good time * 1635 \*******************************************************/ 1636 if(fd->flags & FD_MOTOR_WAIT) { 1637 fdc->state = MOTORWAIT; 1638 return (0); /* come back later */ 1639 } 1640 /*******************************************************\ 1641 * Maybe if it's not starting, it SHOULD be starting * 1642 \*******************************************************/ 1643 if (!(fd->flags & FD_MOTOR)) 1644 { 1645 fdc->state = MOTORWAIT; 1646 fd_turnon(fd); 1647 return (0); 1648 } 1649 else /* at least make sure we are selected */ 1650 { 1651 set_motor(fdc, fd->fdsu, TURNON); 1652 } 1653 if (fdc->flags & FDC_NEEDS_RESET) { 1654 fdc->state = RESETCTLR; 1655 fdc->flags &= ~FDC_NEEDS_RESET; 1656 } else 1657 fdc->state = DOSEEK; 1658 break; 1659 case DOSEEK: 1660 if (b_cylinder == (unsigned)fd->track) 1661 { 1662 fdc->state = SEEKCOMPLETE; 1663 break; 1664 } 1665 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 1666 fd->fdsu, b_cylinder * fd->ft->steptrac, 1667 0)) 1668 { 1669 /* 1670 * seek command not accepted, looks like 1671 * the FDC went off to the Saints... 1672 */ 1673 fdc->retry = 6; /* try a reset */ 1674 return(retrier(fdc)); 1675 } 1676 fd->track = FD_NO_TRACK; 1677 fdc->state = SEEKWAIT; 1678 return(0); /* will return later */ 1679 case SEEKWAIT: 1680 /* allow heads to settle */ 1681 callout_reset(&fdc->pseudointr_ch, hz / 16, 1682 fd_pseudointr, fdc); 1683 fdc->state = SEEKCOMPLETE; 1684 return(0); /* will return later */ 1685 case SEEKCOMPLETE : /* SEEK DONE, START DMA */ 1686 /* Make sure seek really happened*/ 1687 if(fd->track == FD_NO_TRACK) { 1688 int descyl = b_cylinder * fd->ft->steptrac; 1689 do { 1690 /* 1691 * This might be a "ready changed" interrupt, 1692 * which cannot really happen since the 1693 * RDY pin is hardwired to + 5 volts. This 1694 * generally indicates a "bouncing" intr 1695 * line, so do one of the following: 1696 * 1697 * When running on an enhanced FDC that is 1698 * known to not go stuck after responding 1699 * with INVALID, fetch all interrupt states 1700 * until seeing either an INVALID or a 1701 * real interrupt condition. 1702 * 1703 * When running on a dumb old NE765, give 1704 * up immediately. The controller will 1705 * provide up to four dummy RC interrupt 1706 * conditions right after reset (for the 1707 * corresponding four drives), so this is 1708 * our only chance to get notice that it 1709 * was not the FDC that caused the interrupt. 1710 */ 1711 if (fd_sense_int(fdc, &st0, &cyl) 1712 == FD_NOT_VALID) 1713 return 0; 1714 if(fdc->fdct == FDC_NE765 1715 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1716 return 0; /* hope for a real intr */ 1717 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1718 1719 if (0 == descyl) { 1720 int failed = 0; 1721 /* 1722 * seek to cyl 0 requested; make sure we are 1723 * really there 1724 */ 1725 if (fd_sense_drive_status(fdc, &st3)) 1726 failed = 1; 1727 if ((st3 & NE7_ST3_T0) == 0) { 1728 kprintf( 1729 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 1730 fdu, st3, NE7_ST3BITS); 1731 failed = 1; 1732 } 1733 1734 if (failed) { 1735 if(fdc->retry < 3) 1736 fdc->retry = 3; 1737 return (retrier(fdc)); 1738 } 1739 } 1740 1741 if (cyl != descyl) { 1742 kprintf( 1743 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 1744 fdu, descyl, cyl, st0); 1745 if (fdc->retry < 3) 1746 fdc->retry = 3; 1747 return (retrier(fdc)); 1748 } 1749 } 1750 1751 fd->track = b_cylinder; 1752 if (!(fdc->flags & FDC_NODMA)) { 1753 isa_dmastart(isa_dmabp(bp), 1754 bp->b_data+fd->skip, 1755 format ? bp->b_bcount : fdblk, fdc->dmachan); 1756 } 1757 sectrac = fd->ft->sectrac; 1758 sec = blknum % (sectrac * fd->ft->heads); 1759 head = sec / sectrac; 1760 sec = sec % sectrac + 1; 1761 fd->hddrv = ((head&1)<<2)+fdu; 1762 1763 if(format || !read) 1764 { 1765 /* make sure the drive is writable */ 1766 if(fd_sense_drive_status(fdc, &st3) != 0) 1767 { 1768 /* stuck controller? */ 1769 if (!(fdc->flags & FDC_NODMA)) 1770 isa_dmadone(isa_dmabp(bp), 1771 bp->b_data + fd->skip, 1772 format ? bp->b_bcount : fdblk, 1773 fdc->dmachan); 1774 fdc->retry = 6; /* reset the beast */ 1775 return (retrier(fdc)); 1776 } 1777 if(st3 & NE7_ST3_WP) 1778 { 1779 /* 1780 * XXX YES! this is ugly. 1781 * in order to force the current operation 1782 * to fail, we will have to fake an FDC 1783 * error - all error handling is done 1784 * by the retrier() 1785 */ 1786 fdc->status[0] = NE7_ST0_IC_AT; 1787 fdc->status[1] = NE7_ST1_NW; 1788 fdc->status[2] = 0; 1789 fdc->status[3] = fd->track; 1790 fdc->status[4] = head; 1791 fdc->status[5] = sec; 1792 fdc->retry = 8; /* break out immediately */ 1793 fdc->state = IOTIMEDOUT; /* not really... */ 1794 return (1); 1795 } 1796 } 1797 1798 if (format) { 1799 if (fdc->flags & FDC_NODMA) { 1800 /* 1801 * This seems to be necessary for 1802 * whatever obscure reason; if we omit 1803 * it, we end up filling the sector ID 1804 * fields of the newly formatted track 1805 * entirely with garbage, causing 1806 * `wrong cylinder' errors all over 1807 * the place when trying to read them 1808 * back. 1809 * 1810 * Umpf. 1811 */ 1812 SET_BCDR(fdc, 1, bp->b_bcount, 0); 1813 1814 (void)fdcpio(fdc,bp->b_cmd, 1815 bp->b_data+fd->skip, 1816 bp->b_bcount); 1817 1818 } 1819 /* formatting */ 1820 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu, 1821 finfo->fd_formb_secshift, 1822 finfo->fd_formb_nsecs, 1823 finfo->fd_formb_gaplen, 1824 finfo->fd_formb_fillbyte, 0)) { 1825 /* controller fell over */ 1826 if (!(fdc->flags & FDC_NODMA)) 1827 isa_dmadone(isa_dmabp(bp), 1828 bp->b_data + fd->skip, 1829 format ? bp->b_bcount : fdblk, 1830 fdc->dmachan); 1831 fdc->retry = 6; 1832 return (retrier(fdc)); 1833 } 1834 } else { 1835 if (fdc->flags & FDC_NODMA) { 1836 /* 1837 * this seems to be necessary even when 1838 * reading data 1839 */ 1840 SET_BCDR(fdc, 1, fdblk, 0); 1841 1842 /* 1843 * perform the write pseudo-DMA before 1844 * the WRITE command is sent 1845 */ 1846 if (!read) 1847 (void)fdcpio(fdc,bp->b_cmd, 1848 bp->b_data+fd->skip, 1849 fdblk); 1850 } 1851 if (fd_cmd(fdc, 9, 1852 (read ? NE7CMD_READ : NE7CMD_WRITE), 1853 head << 2 | fdu, /* head & unit */ 1854 fd->track, /* track */ 1855 head, 1856 sec, /* sector + 1 */ 1857 fd->ft->secsize, /* sector size */ 1858 sectrac, /* sectors/track */ 1859 fd->ft->gap, /* gap size */ 1860 fd->ft->datalen, /* data length */ 1861 0)) { 1862 /* the beast is sleeping again */ 1863 if (!(fdc->flags & FDC_NODMA)) 1864 isa_dmadone(isa_dmabp(bp), 1865 bp->b_data + fd->skip, 1866 format ? bp->b_bcount : fdblk, 1867 fdc->dmachan); 1868 fdc->retry = 6; 1869 return (retrier(fdc)); 1870 } 1871 } 1872 if (fdc->flags & FDC_NODMA) 1873 /* 1874 * if this is a read, then simply await interrupt 1875 * before performing PIO 1876 */ 1877 if (read && !fdcpio(fdc,bp->b_cmd, 1878 bp->b_data+fd->skip,fdblk)) { 1879 callout_reset(&fd->tohandle, hz, 1880 fd_iotimeout, fdc); 1881 return(0); /* will return later */ 1882 }; 1883 1884 /* 1885 * write (or format) operation will fall through and 1886 * await completion interrupt 1887 */ 1888 fdc->state = IOCOMPLETE; 1889 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc); 1890 return (0); /* will return later */ 1891 case PIOREAD: 1892 /* 1893 * actually perform the PIO read. The IOCOMPLETE case 1894 * removes the timeout for us. 1895 */ 1896 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk); 1897 fdc->state = IOCOMPLETE; 1898 /* FALLTHROUGH */ 1899 case IOCOMPLETE: /* IO DONE, post-analyze */ 1900 callout_stop(&fd->tohandle); 1901 1902 if (fd_read_status(fdc, fd->fdsu)) { 1903 if (!(fdc->flags & FDC_NODMA)) { 1904 isa_dmadone(isa_dmabp(bp), 1905 bp->b_data + fd->skip, 1906 format ? bp->b_bcount : fdblk, 1907 fdc->dmachan); 1908 } 1909 if (fdc->retry < 6) 1910 fdc->retry = 6; /* force a reset */ 1911 return (retrier(fdc)); 1912 } 1913 1914 fdc->state = IOTIMEDOUT; 1915 1916 /* FALLTHROUGH */ 1917 1918 case IOTIMEDOUT: 1919 if (!(fdc->flags & FDC_NODMA)) { 1920 isa_dmadone(isa_dmabp(bp), 1921 bp->b_data + fd->skip, 1922 format ? bp->b_bcount : fdblk, fdc->dmachan); 1923 } 1924 if (fdc->status[0] & NE7_ST0_IC) { 1925 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1926 && fdc->status[1] & NE7_ST1_OR) { 1927 /* 1928 * DMA overrun. Someone hogged the bus and 1929 * didn't release it in time for the next 1930 * FDC transfer. 1931 * 1932 * We normally restart this without bumping 1933 * the retry counter. However, in case 1934 * something is seriously messed up (like 1935 * broken hardware), we rather limit the 1936 * number of retries so the IO operation 1937 * doesn't block indefinately. 1938 */ 1939 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 1940 fdc->state = SEEKCOMPLETE; 1941 return (1); 1942 } /* else fall through */ 1943 } 1944 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 1945 && fdc->retry < 6) 1946 fdc->retry = 6; /* force a reset */ 1947 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1948 && fdc->status[2] & NE7_ST2_WC 1949 && fdc->retry < 3) 1950 fdc->retry = 3; /* force recalibrate */ 1951 return (retrier(fdc)); 1952 } 1953 /* All OK */ 1954 /* Operation successful, retry DMA overruns again next time. */ 1955 fdc->dma_overruns = 0; 1956 fd->skip += fdblk; 1957 if (!format && fd->skip < bp->b_bcount - bp->b_resid) { 1958 /* set up next transfer */ 1959 fdc->state = DOSEEK; 1960 } else { 1961 /* ALL DONE */ 1962 fd->skip = 0; 1963 fdc->bio = NULL; 1964 device_unbusy(fd->dev); 1965 devstat_end_transaction_buf(&fd->device_stats, bp); 1966 biodone(bio); 1967 fdc->fd = (fd_p) 0; 1968 fdc->fdu = -1; 1969 fdc->state = FINDWORK; 1970 } 1971 return (1); 1972 case RESETCTLR: 1973 fdc_reset(fdc); 1974 fdc->retry++; 1975 fdc->state = RESETCOMPLETE; 1976 return (0); 1977 case RESETCOMPLETE: 1978 /* 1979 * Discard all the results from the reset so that they 1980 * can't cause an unexpected interrupt later. 1981 */ 1982 for (i = 0; i < 4; i++) 1983 (void)fd_sense_int(fdc, &st0, &cyl); 1984 fdc->state = STARTRECAL; 1985 /* Fall through. */ 1986 case STARTRECAL: 1987 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 1988 /* arrgl */ 1989 fdc->retry = 6; 1990 return (retrier(fdc)); 1991 } 1992 fdc->state = RECALWAIT; 1993 return (0); /* will return later */ 1994 case RECALWAIT: 1995 /* allow heads to settle */ 1996 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc); 1997 fdc->state = RECALCOMPLETE; 1998 return (0); /* will return later */ 1999 case RECALCOMPLETE: 2000 do { 2001 /* 2002 * See SEEKCOMPLETE for a comment on this: 2003 */ 2004 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2005 return 0; 2006 if(fdc->fdct == FDC_NE765 2007 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2008 return 0; /* hope for a real intr */ 2009 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2010 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2011 { 2012 if(fdc->retry > 3) 2013 /* 2014 * a recalibrate from beyond cylinder 77 2015 * will "fail" due to the FDC limitations; 2016 * since people used to complain much about 2017 * the failure message, try not logging 2018 * this one if it seems to be the first 2019 * time in a line 2020 */ 2021 kprintf("fd%d: recal failed ST0 %b cyl %d\n", 2022 fdu, st0, NE7_ST0BITS, cyl); 2023 if(fdc->retry < 3) fdc->retry = 3; 2024 return (retrier(fdc)); 2025 } 2026 fd->track = 0; 2027 /* Seek (probably) necessary */ 2028 fdc->state = DOSEEK; 2029 return (1); /* will return immediatly */ 2030 case MOTORWAIT: 2031 if(fd->flags & FD_MOTOR_WAIT) 2032 { 2033 return (0); /* time's not up yet */ 2034 } 2035 if (fdc->flags & FDC_NEEDS_RESET) { 2036 fdc->state = RESETCTLR; 2037 fdc->flags &= ~FDC_NEEDS_RESET; 2038 } else { 2039 /* 2040 * If all motors were off, then the controller was 2041 * reset, so it has lost track of the current 2042 * cylinder. Recalibrate to handle this case. 2043 * But first, discard the results of the reset. 2044 */ 2045 fdc->state = RESETCOMPLETE; 2046 } 2047 return (1); /* will return immediatly */ 2048 default: 2049 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2050 if (fd_read_status(fdc, fd->fdsu) == 0) 2051 kprintf("FDC status :%x %x %x %x %x %x %x ", 2052 fdc->status[0], 2053 fdc->status[1], 2054 fdc->status[2], 2055 fdc->status[3], 2056 fdc->status[4], 2057 fdc->status[5], 2058 fdc->status[6] ); 2059 else 2060 kprintf("No status available "); 2061 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2062 { 2063 kprintf("[controller is dead now]\n"); 2064 return (0); 2065 } 2066 kprintf("ST0 = %x, PCN = %x\n", st0, cyl); 2067 return (0); 2068 } 2069 /*XXX confusing: some branches return immediately, others end up here*/ 2070 return (1); /* Come back immediatly to new state */ 2071 } 2072 2073 static int 2074 retrier(struct fdc_data *fdc) 2075 { 2076 struct bio *bio; 2077 struct buf *bp; 2078 struct fd_data *fd; 2079 cdev_t dev; 2080 int fdu; 2081 2082 bio = fdc->bio; 2083 bp = bio->bio_buf; 2084 dev = bio->bio_driver_info; 2085 2086 /* XXX shouldn't this be cached somewhere? */ 2087 fdu = FDUNIT(minor(dev)); 2088 fd = devclass_get_softc(fd_devclass, fdu); 2089 if (fd->options & FDOPT_NORETRY) 2090 goto fail; 2091 2092 switch (fdc->retry) { 2093 case 0: case 1: case 2: 2094 fdc->state = SEEKCOMPLETE; 2095 break; 2096 case 3: case 4: case 5: 2097 fdc->state = STARTRECAL; 2098 break; 2099 case 6: 2100 fdc->state = RESETCTLR; 2101 break; 2102 case 7: 2103 break; 2104 default: 2105 fail: 2106 { 2107 int printerror = (fd->options & FDOPT_NOERRLOG) == 0; 2108 2109 if (printerror) { 2110 /* 2111 * note: use the correct device for more 2112 * verbose error reporting. 2113 */ 2114 cdev_t subdev; 2115 2116 subdev = make_sub_dev(dev, 2117 (FDUNIT(minor(dev))<<3)|RAW_PART); 2118 diskerr(bio, subdev, 2119 "hard error", LOG_PRINTF, 2120 fdc->fd->skip); 2121 } 2122 if (printerror) { 2123 if (fdc->flags & FDC_STAT_VALID) 2124 kprintf( 2125 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2126 fdc->status[0], NE7_ST0BITS, 2127 fdc->status[1], NE7_ST1BITS, 2128 fdc->status[2], NE7_ST2BITS, 2129 fdc->status[3], fdc->status[4], 2130 fdc->status[5]); 2131 else 2132 kprintf(" (No status)\n"); 2133 } 2134 } 2135 bp->b_flags |= B_ERROR; 2136 bp->b_error = EIO; 2137 bp->b_resid += bp->b_bcount - fdc->fd->skip; 2138 fdc->bio = NULL; 2139 fdc->fd->skip = 0; 2140 device_unbusy(fd->dev); 2141 devstat_end_transaction_buf(&fdc->fd->device_stats, bp); 2142 biodone(bio); 2143 fdc->state = FINDWORK; 2144 fdc->flags |= FDC_NEEDS_RESET; 2145 fdc->fd = (fd_p) 0; 2146 fdc->fdu = -1; 2147 return (1); 2148 } 2149 fdc->retry++; 2150 return (1); 2151 } 2152 2153 static void 2154 fdformat_wakeup(struct bio *bio) 2155 { 2156 bio->bio_buf->b_cmd = BUF_CMD_DONE; 2157 wakeup(bio); 2158 } 2159 2160 static int 2161 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred) 2162 { 2163 fdu_t fdu; 2164 fd_p fd; 2165 struct buf *bp; 2166 int rv = 0; 2167 size_t fdblk; 2168 2169 fdu = FDUNIT(minor(dev)); 2170 fd = devclass_get_softc(fd_devclass, fdu); 2171 fdblk = 128 << fd->ft->secsize; 2172 2173 /* set up a buffer header for fdstrategy() */ 2174 bp = getpbuf(NULL); 2175 bp->b_cmd = BUF_CMD_FORMAT; 2176 2177 /* 2178 * calculate a fake blkno, so fdstrategy() would initiate a 2179 * seek to the requested cylinder 2180 */ 2181 bp->b_bio1.bio_offset = (off_t)(finfo->cyl * 2182 (fd->ft->sectrac * fd->ft->heads) 2183 + finfo->head * fd->ft->sectrac) * fdblk; 2184 bp->b_bio1.bio_driver_info = dev; 2185 bp->b_bio1.bio_done = fdformat_wakeup; 2186 2187 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; 2188 bp->b_data = (caddr_t)finfo; 2189 2190 /* now do the format */ 2191 dev_dstrategy(dev, &bp->b_bio1); 2192 2193 /* ...and wait for it to complete */ 2194 crit_enter(); 2195 while (bp->b_cmd != BUF_CMD_DONE) { 2196 rv = tsleep(&bp->b_bio1, 0, "fdform", 20 * hz); 2197 if (rv == EWOULDBLOCK) 2198 break; 2199 } 2200 crit_exit(); 2201 2202 if (rv == EWOULDBLOCK) { 2203 /* timed out */ 2204 rv = EIO; 2205 device_unbusy(fd->dev); 2206 biodone(&bp->b_bio1); 2207 } 2208 if (bp->b_flags & B_ERROR) 2209 rv = bp->b_error; 2210 /* 2211 * allow the process to be swapped 2212 */ 2213 relpbuf(bp, NULL); 2214 return rv; 2215 } 2216 2217 /* 2218 * TODO: don't allocate buffer on stack. 2219 */ 2220 2221 static int 2222 fdioctl(struct dev_ioctl_args *ap) 2223 { 2224 cdev_t dev = ap->a_head.a_dev; 2225 fdu_t fdu = FDUNIT(minor(dev)); 2226 fd_p fd = devclass_get_softc(fd_devclass, fdu); 2227 size_t fdblk; 2228 2229 struct fd_type *fdt; 2230 struct disklabel *dl; 2231 struct fdc_status *fsp; 2232 char buffer[DEV_BSIZE]; 2233 int error = 0; 2234 2235 fdblk = 128 << fd->ft->secsize; 2236 2237 switch (ap->a_cmd) { 2238 case DIOCGDINFO: 2239 bzero(buffer, sizeof (buffer)); 2240 dl = (struct disklabel *)buffer; 2241 dl->d_secsize = fdblk; 2242 fdt = fd->ft; 2243 dl->d_secpercyl = fdt->size / fdt->tracks; 2244 dl->d_type = DTYPE_FLOPPY; 2245 2246 if (readdisklabel(dev, dl) 2247 == NULL) 2248 error = 0; 2249 else 2250 error = EINVAL; 2251 2252 *(struct disklabel *)ap->a_data = *dl; 2253 break; 2254 2255 case DIOCSDINFO: 2256 if ((ap->a_fflag & FWRITE) == 0) 2257 error = EBADF; 2258 break; 2259 2260 case DIOCWLABEL: 2261 if ((ap->a_fflag & FWRITE) == 0) 2262 error = EBADF; 2263 break; 2264 2265 case DIOCWDINFO: 2266 if ((ap->a_fflag & FWRITE) == 0) { 2267 error = EBADF; 2268 break; 2269 } 2270 2271 dl = (struct disklabel *)ap->a_data; 2272 2273 if ((error = setdisklabel((struct disklabel *)buffer, dl, 2274 (u_long)0)) != 0) 2275 break; 2276 2277 error = writedisklabel(dev, (struct disklabel *)buffer); 2278 break; 2279 case FD_FORM: 2280 if ((ap->a_fflag & FWRITE) == 0) 2281 error = EBADF; /* must be opened for writing */ 2282 else if (((struct fd_formb *)ap->a_data)->format_version != 2283 FD_FORMAT_VERSION) 2284 error = EINVAL; /* wrong version of formatting prog */ 2285 else 2286 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred); 2287 break; 2288 2289 case FD_GTYPE: /* get drive type */ 2290 *(struct fd_type *)ap->a_data = *fd->ft; 2291 break; 2292 2293 case FD_STYPE: /* set drive type */ 2294 /* this is considered harmful; only allow for superuser */ 2295 if (suser_cred(ap->a_cred, 0) != 0) 2296 return EPERM; 2297 *fd->ft = *(struct fd_type *)ap->a_data; 2298 break; 2299 2300 case FD_GOPTS: /* get drive options */ 2301 *(int *)ap->a_data = fd->options; 2302 break; 2303 2304 case FD_SOPTS: /* set drive options */ 2305 fd->options = *(int *)ap->a_data; 2306 break; 2307 2308 case FD_GSTAT: 2309 fsp = (struct fdc_status *)ap->a_data; 2310 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2311 return EINVAL; 2312 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2313 break; 2314 2315 default: 2316 error = ENOTTY; 2317 break; 2318 } 2319 return (error); 2320 } 2321 2322 /* 2323 * Hello emacs, these are the 2324 * Local Variables: 2325 * c-indent-level: 8 2326 * c-continued-statement-offset: 8 2327 * c-continued-brace-offset: 0 2328 * c-brace-offset: -8 2329 * c-brace-imaginary-offset: 0 2330 * c-argdecl-indent: 8 2331 * c-label-offset: -8 2332 * c++-hanging-braces: 1 2333 * c++-access-specifier-offset: -8 2334 * c++-empty-arglist-indent: 8 2335 * c++-friend-offset: 0 2336 * End: 2337 */ 2338