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 1.39 2007/05/21 04:22:23 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/diskslice.h> 70 #include <sys/disk.h> 71 #include <sys/devicestat.h> 72 #include <sys/fcntl.h> 73 #include <sys/malloc.h> 74 #include <sys/module.h> 75 #include <sys/proc.h> 76 #include <sys/syslog.h> 77 #include <sys/device.h> 78 #include <sys/bus.h> 79 #include <sys/rman.h> 80 #include <sys/buf2.h> 81 #include <sys/thread2.h> 82 83 #include <machine/clock.h> 84 #include <machine/ioctl_fd.h> 85 #include <machine/stdarg.h> 86 87 #include <bus/isa/isavar.h> 88 #include <bus/isa/isareg.h> 89 #include "fdreg.h" 90 #include "fdc.h" 91 #include <bus/isa/rtc.h> 92 93 /* configuration flags */ 94 #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */ 95 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ 96 97 /* internally used only, not really from CMOS: */ 98 #define RTCFDT_144M_PRETENDED 0x1000 99 100 /* error returns for fd_cmd() */ 101 #define FD_FAILED -1 102 #define FD_NOT_VALID -2 103 #define FDC_ERRMAX 100 /* do not log more */ 104 /* 105 * Stop retrying after this many DMA overruns. Since each retry takes 106 * one revolution, with 300 rpm., 25 retries take approximately 10 107 * seconds which the read attempt will block in case the DMA overrun 108 * is persistent. 109 */ 110 #define FDC_DMAOV_MAX 25 111 112 /* 113 * Timeout value for the PIO loops to wait until the FDC main status 114 * register matches our expectations (request for master, direction 115 * bit). This is supposed to be a number of microseconds, although 116 * timing might actually not be very accurate. 117 * 118 * Timeouts of 100 msec are believed to be required for some broken 119 * (old) hardware. 120 */ 121 #define FDSTS_TIMEOUT 100000 122 123 #define NUMTYPES 17 124 #define NUMDENS (NUMTYPES - 7) 125 126 /* These defines (-1) must match index for fd_types */ 127 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */ 128 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */ 129 #define FD_1720 1 130 #define FD_1480 2 131 #define FD_1440 3 132 #define FD_1200 4 133 #define FD_820 5 134 #define FD_800 6 135 #define FD_720 7 136 #define FD_360 8 137 #define FD_640 9 138 #define FD_1232 10 139 140 #define FD_1480in5_25 11 141 #define FD_1440in5_25 12 142 #define FD_820in5_25 13 143 #define FD_800in5_25 14 144 #define FD_720in5_25 15 145 #define FD_360in5_25 16 146 #define FD_640in5_25 17 147 148 149 static struct fd_type fd_types[NUMTYPES] = 150 { 151 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */ 152 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */ 153 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */ 154 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */ 155 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */ 156 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */ 157 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */ 158 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */ 159 { 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */ 160 { 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */ 161 162 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */ 163 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */ 164 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */ 165 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */ 166 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */ 167 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */ 168 { 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */ 169 }; 170 171 #define DRVS_PER_CTLR 2 /* 2 floppies */ 172 173 /***********************************************************************\ 174 * Per controller structure. * 175 \***********************************************************************/ 176 devclass_t fdc_devclass; 177 178 /***********************************************************************\ 179 * Per drive structure. * 180 * N per controller (DRVS_PER_CTLR) * 181 \***********************************************************************/ 182 struct fd_data { 183 struct fdc_data *fdc; /* pointer to controller structure */ 184 int fdsu; /* this units number on this controller */ 185 int type; /* Drive type (FD_1440...) */ 186 struct fd_type ft; /* the type descriptor */ 187 int flags; 188 #define FD_OPEN 0x01 /* it's open */ 189 #define FD_ACTIVE 0x02 /* it's active */ 190 #define FD_MOTOR 0x04 /* motor should be on */ 191 #define FD_MOTOR_WAIT 0x08 /* motor coming up */ 192 int skip; 193 int hddrv; 194 #define FD_NO_TRACK -2 195 int track; /* where we think the head is */ 196 int options; /* user configurable options, see ioctl_fd.h */ 197 struct callout toffhandle; 198 struct callout tohandle; 199 struct callout motor; 200 struct disk disk; 201 struct devstat device_stats; 202 device_t dev; 203 fdu_t fdu; 204 }; 205 206 struct fdc_ivars { 207 int fdunit; 208 }; 209 static devclass_t fd_devclass; 210 211 /***********************************************************************\ 212 * Throughout this file the following conventions will be used: * 213 * fd is a pointer to the fd_data struct for the drive in question * 214 * fdc is a pointer to the fdc_data struct for the controller * 215 * fdu is the floppy drive unit number * 216 * fdcu is the floppy controller unit number * 217 * fdsu is the floppy drive unit number on that controller. (sub-unit) * 218 \***********************************************************************/ 219 220 /* internal functions */ 221 static void fdc_intr(void *); 222 static void set_motor(struct fdc_data *, int, int); 223 # define TURNON 1 224 # define TURNOFF 0 225 static timeout_t fd_turnoff; 226 static timeout_t fd_motor_on; 227 static void fd_turnon(struct fd_data *); 228 static void fdc_reset(fdc_p); 229 static int fd_in(struct fdc_data *, int *); 230 static int out_fdc(struct fdc_data *, int); 231 static void fdstart(struct fdc_data *); 232 static timeout_t fd_iotimeout; 233 static timeout_t fd_pseudointr; 234 static int fdstate(struct fdc_data *); 235 static int retrier(struct fdc_data *); 236 static int fdformat(cdev_t, struct fd_formb *, struct ucred *); 237 238 static int enable_fifo(fdc_p fdc); 239 240 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 241 242 243 #define DEVIDLE 0 244 #define FINDWORK 1 245 #define DOSEEK 2 246 #define SEEKCOMPLETE 3 247 #define IOCOMPLETE 4 248 #define RECALCOMPLETE 5 249 #define STARTRECAL 6 250 #define RESETCTLR 7 251 #define SEEKWAIT 8 252 #define RECALWAIT 9 253 #define MOTORWAIT 10 254 #define IOTIMEDOUT 11 255 #define RESETCOMPLETE 12 256 #define PIOREAD 13 257 258 #ifdef FDC_DEBUG 259 static char const * const fdstates[] = 260 { 261 "DEVIDLE", 262 "FINDWORK", 263 "DOSEEK", 264 "SEEKCOMPLETE", 265 "IOCOMPLETE", 266 "RECALCOMPLETE", 267 "STARTRECAL", 268 "RESETCTLR", 269 "SEEKWAIT", 270 "RECALWAIT", 271 "MOTORWAIT", 272 "IOTIMEDOUT", 273 "RESETCOMPLETE", 274 "PIOREAD", 275 }; 276 277 /* CAUTION: fd_debug causes huge amounts of logging output */ 278 static int volatile fd_debug = 0; 279 #define TRACE0(arg) if(fd_debug) kprintf(arg) 280 #define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2) 281 #else /* FDC_DEBUG */ 282 #define TRACE0(arg) 283 #define TRACE1(arg1, arg2) 284 #endif /* FDC_DEBUG */ 285 286 void 287 fdout_wr(fdc_p fdc, u_int8_t v) 288 { 289 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 290 } 291 292 static u_int8_t 293 fdsts_rd(fdc_p fdc) 294 { 295 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 296 } 297 298 static void 299 fddata_wr(fdc_p fdc, u_int8_t v) 300 { 301 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 302 } 303 304 static u_int8_t 305 fddata_rd(fdc_p fdc) 306 { 307 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 308 } 309 310 static void 311 fdctl_wr_isa(fdc_p fdc, u_int8_t v) 312 { 313 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 314 } 315 316 #if 0 317 318 static u_int8_t 319 fdin_rd(fdc_p fdc) 320 { 321 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 322 } 323 324 #endif 325 326 static d_open_t Fdopen; /* NOTE, not fdopen */ 327 static d_close_t fdclose; 328 static d_ioctl_t fdioctl; 329 static d_strategy_t fdstrategy; 330 331 static struct dev_ops fd_ops = { 332 { "fd", FD_CDEV_MAJOR, D_DISK }, 333 .d_open = Fdopen, 334 .d_close = fdclose, 335 .d_read = physread, 336 .d_write = physwrite, 337 .d_ioctl = fdioctl, 338 .d_strategy = fdstrategy, 339 }; 340 341 static int 342 fdc_err(struct fdc_data *fdc, const char *s) 343 { 344 fdc->fdc_errs++; 345 if (s) { 346 if (fdc->fdc_errs < FDC_ERRMAX) 347 device_printf(fdc->fdc_dev, "%s", s); 348 else if (fdc->fdc_errs == FDC_ERRMAX) 349 device_printf(fdc->fdc_dev, "too many errors, not " 350 "logging any more\n"); 351 } 352 353 return FD_FAILED; 354 } 355 356 /* 357 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 358 * Unit number, 359 * # of output bytes, output bytes as ints ..., 360 * # of input bytes, input bytes as ints ... 361 */ 362 int 363 fd_cmd(struct fdc_data *fdc, int n_out, ...) 364 { 365 u_char cmd; 366 int n_in; 367 int n; 368 __va_list ap; 369 370 __va_start(ap, n_out); 371 cmd = (u_char)(__va_arg(ap, int)); 372 __va_end(ap); 373 __va_start(ap, n_out); 374 for (n = 0; n < n_out; n++) 375 { 376 if (out_fdc(fdc, __va_arg(ap, int)) < 0) 377 { 378 char msg[50]; 379 ksnprintf(msg, sizeof(msg), 380 "cmd %x failed at out byte %d of %d\n", 381 cmd, n + 1, n_out); 382 return fdc_err(fdc, msg); 383 } 384 } 385 n_in = __va_arg(ap, int); 386 for (n = 0; n < n_in; n++) 387 { 388 int *ptr = __va_arg(ap, int *); 389 if (fd_in(fdc, ptr) < 0) 390 { 391 char msg[50]; 392 ksnprintf(msg, sizeof(msg), 393 "cmd %02x failed at in byte %d of %d\n", 394 cmd, n + 1, n_in); 395 return fdc_err(fdc, msg); 396 } 397 } 398 399 return 0; 400 } 401 402 static int 403 enable_fifo(fdc_p fdc) 404 { 405 int i, j; 406 407 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 408 409 /* 410 * XXX: 411 * Cannot use fd_cmd the normal way here, since 412 * this might be an invalid command. Thus we send the 413 * first byte, and check for an early turn of data directon. 414 */ 415 416 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 417 return fdc_err(fdc, "Enable FIFO failed\n"); 418 419 /* If command is invalid, return */ 420 j = FDSTS_TIMEOUT; 421 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 422 != NE7_RQM && j-- > 0) { 423 if (i == (NE7_DIO | NE7_RQM)) { 424 fdc_reset(fdc); 425 return FD_FAILED; 426 } 427 DELAY(1); 428 } 429 if (j<0 || 430 fd_cmd(fdc, 3, 431 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 432 fdc_reset(fdc); 433 return fdc_err(fdc, "Enable FIFO failed\n"); 434 } 435 fdc->flags |= FDC_HAS_FIFO; 436 return 0; 437 } 438 if (fd_cmd(fdc, 4, 439 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 440 return fdc_err(fdc, "Re-enable FIFO failed\n"); 441 return 0; 442 } 443 444 static int 445 fd_sense_drive_status(fdc_p fdc, int *st3p) 446 { 447 int st3; 448 449 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 450 { 451 return fdc_err(fdc, "Sense Drive Status failed\n"); 452 } 453 if (st3p) 454 *st3p = st3; 455 456 return 0; 457 } 458 459 static int 460 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 461 { 462 int cyl, st0, ret; 463 464 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 465 if (ret) { 466 (void)fdc_err(fdc, 467 "sense intr err reading stat reg 0\n"); 468 return ret; 469 } 470 471 if (st0p) 472 *st0p = st0; 473 474 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 475 /* 476 * There doesn't seem to have been an interrupt. 477 */ 478 return FD_NOT_VALID; 479 } 480 481 if (fd_in(fdc, &cyl) < 0) { 482 return fdc_err(fdc, "can't get cyl num\n"); 483 } 484 485 if (cylp) 486 *cylp = cyl; 487 488 return 0; 489 } 490 491 492 static int 493 fd_read_status(fdc_p fdc, int fdsu) 494 { 495 int i, ret; 496 497 for (i = 0; i < 7; i++) { 498 /* 499 * XXX types are poorly chosen. Only bytes can by read 500 * from the hardware, but fdc->status[] wants u_ints and 501 * fd_in() gives ints. 502 */ 503 int status; 504 505 ret = fd_in(fdc, &status); 506 fdc->status[i] = status; 507 if (ret != 0) 508 break; 509 } 510 511 if (ret == 0) 512 fdc->flags |= FDC_STAT_VALID; 513 else 514 fdc->flags &= ~FDC_STAT_VALID; 515 516 return ret; 517 } 518 519 /****************************************************************************/ 520 /* autoconfiguration stuff */ 521 /****************************************************************************/ 522 523 int 524 fdc_alloc_resources(struct fdc_data *fdc) 525 { 526 device_t dev; 527 int ispnp, ispcmcia; 528 529 dev = fdc->fdc_dev; 530 ispnp = (fdc->flags & FDC_ISPNP) != 0; 531 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 532 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 533 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 534 535 /* 536 * On standard ISA, we don't just use an 8 port range 537 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 538 * register at 0x3f6. 539 * 540 * Isn't PC hardware wonderful. 541 * 542 * The Y-E Data PCMCIA FDC doesn't have this problem, it 543 * uses the register with offset 6 for pseudo-DMA, and the 544 * one with offset 7 as control register. 545 */ 546 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 547 &fdc->rid_ioport, 0ul, ~0ul, 548 ispcmcia ? 8 : (ispnp ? 1 : 6), 549 RF_ACTIVE); 550 if (fdc->res_ioport == 0) { 551 device_printf(dev, "cannot reserve I/O port range\n"); 552 return ENXIO; 553 } 554 fdc->portt = rman_get_bustag(fdc->res_ioport); 555 fdc->porth = rman_get_bushandle(fdc->res_ioport); 556 557 if (!ispcmcia) { 558 /* 559 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 560 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 561 * by checking the size and adjust the port address 562 * accordingly. 563 */ 564 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 565 fdc->port_off = -2; 566 567 /* 568 * Register the control port range as rid 1 if it 569 * isn't there already. Most PnP BIOSen will have 570 * already done this but non-PnP configurations don't. 571 * 572 * And some (!!) report 0x3f2-0x3f5 and completely 573 * leave out the control register! It seems that some 574 * non-antique controller chips have a different 575 * method of programming the transfer speed which 576 * doesn't require the control register, but it's 577 * mighty bogus as the chip still responds to the 578 * address for the control register. 579 */ 580 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 581 u_long ctlstart; 582 583 /* Find the control port, usually 0x3f7 */ 584 ctlstart = rman_get_start(fdc->res_ioport) + 585 fdc->port_off + 7; 586 587 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); 588 } 589 590 /* 591 * Now (finally!) allocate the control port. 592 */ 593 fdc->rid_ctl = 1; 594 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 595 &fdc->rid_ctl, 596 0ul, ~0ul, 1, RF_ACTIVE); 597 if (fdc->res_ctl == 0) { 598 device_printf(dev, 599 "cannot reserve control I/O port range\n"); 600 return ENXIO; 601 } 602 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 603 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 604 } 605 606 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 607 &fdc->rid_irq, 0ul, ~0ul, 1, 608 RF_ACTIVE); 609 if (fdc->res_irq == 0) { 610 device_printf(dev, "cannot reserve interrupt line\n"); 611 return ENXIO; 612 } 613 614 if ((fdc->flags & FDC_NODMA) == 0) { 615 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 616 &fdc->rid_drq, 0ul, ~0ul, 1, 617 RF_ACTIVE); 618 if (fdc->res_drq == 0) { 619 device_printf(dev, "cannot reserve DMA request line\n"); 620 return ENXIO; 621 } 622 fdc->dmachan = fdc->res_drq->r_start; 623 } 624 625 return 0; 626 } 627 628 void 629 fdc_release_resources(struct fdc_data *fdc) 630 { 631 device_t dev; 632 633 dev = fdc->fdc_dev; 634 if (fdc->res_irq != 0) { 635 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 636 fdc->res_irq); 637 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 638 fdc->res_irq); 639 } 640 if (fdc->res_ctl != 0) { 641 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 642 fdc->res_ctl); 643 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 644 fdc->res_ctl); 645 } 646 if (fdc->res_ioport != 0) { 647 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 648 fdc->res_ioport); 649 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 650 fdc->res_ioport); 651 } 652 if (fdc->res_drq != 0) { 653 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 654 fdc->res_drq); 655 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 656 fdc->res_drq); 657 } 658 } 659 660 /****************************************************************************/ 661 /* autoconfiguration stuff */ 662 /****************************************************************************/ 663 664 static struct isa_pnp_id fdc_ids[] = { 665 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 666 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 667 {0} 668 }; 669 670 int 671 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result) 672 { 673 struct fdc_ivars *ivars = device_get_ivars(child); 674 675 switch (which) { 676 case FDC_IVAR_FDUNIT: 677 *result = ivars->fdunit; 678 break; 679 default: 680 return ENOENT; 681 } 682 return 0; 683 } 684 685 /* 686 * fdc controller section. 687 */ 688 static int 689 fdc_probe(device_t dev) 690 { 691 int error, ic_type; 692 struct fdc_data *fdc; 693 694 fdc = device_get_softc(dev); 695 bzero(fdc, sizeof *fdc); 696 fdc->fdc_dev = dev; 697 fdc->fdctl_wr = fdctl_wr_isa; 698 699 /* Check pnp ids */ 700 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 701 if (error == ENXIO) 702 return ENXIO; 703 if (error == 0) 704 fdc->flags |= FDC_ISPNP; 705 706 /* Attempt to allocate our resources for the duration of the probe */ 707 error = fdc_alloc_resources(fdc); 708 if (error) 709 goto out; 710 711 /* First - lets reset the floppy controller */ 712 fdout_wr(fdc, 0); 713 DELAY(100); 714 fdout_wr(fdc, FDO_FRST); 715 716 /* see if it can handle a command */ 717 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 718 NE7_SPEC_2(2, 0), 0)) { 719 error = ENXIO; 720 goto out; 721 } 722 723 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 724 ic_type = (u_char)ic_type; 725 switch (ic_type) { 726 case 0x80: 727 device_set_desc(dev, "NEC 765 or clone"); 728 fdc->fdct = FDC_NE765; 729 break; 730 case 0x81: 731 device_set_desc(dev, "Intel 82077 or clone"); 732 fdc->fdct = FDC_I82077; 733 break; 734 case 0x90: 735 device_set_desc(dev, "NEC 72065B or clone"); 736 fdc->fdct = FDC_NE72065; 737 break; 738 default: 739 device_set_desc(dev, "generic floppy controller"); 740 fdc->fdct = FDC_UNKNOWN; 741 break; 742 } 743 } 744 745 out: 746 fdc_release_resources(fdc); 747 return (error); 748 } 749 750 /* 751 * Add a child device to the fdc controller. It will then be probed etc. 752 */ 753 static void 754 fdc_add_child(device_t dev, const char *name, int unit) 755 { 756 int disabled; 757 struct fdc_ivars *ivar; 758 device_t child; 759 760 ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO); 761 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 762 ivar->fdunit = 0; 763 child = device_add_child(dev, name, unit); 764 if (child == NULL) 765 return; 766 device_set_ivars(child, ivar); 767 if (resource_int_value(name, unit, "disabled", &disabled) == 0 768 && disabled != 0) 769 device_disable(child); 770 } 771 772 int 773 fdc_attach(device_t dev) 774 { 775 struct fdc_data *fdc; 776 int i, error; 777 778 fdc = device_get_softc(dev); 779 780 callout_init(&fdc->pseudointr_ch); 781 782 error = fdc_alloc_resources(fdc); 783 if (error) { 784 device_printf(dev, "cannot re-aquire resources\n"); 785 return error; 786 } 787 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 788 0, fdc_intr, fdc, 789 &fdc->fdc_intr, NULL); 790 if (error) { 791 device_printf(dev, "cannot setup interrupt\n"); 792 return error; 793 } 794 fdc->fdcu = device_get_unit(dev); 795 fdc->flags |= FDC_ATTACHED; 796 797 if ((fdc->flags & FDC_NODMA) == 0) { 798 /* Acquire the DMA channel forever, The driver will do the rest */ 799 /* XXX should integrate with rman */ 800 isa_dma_acquire(fdc->dmachan); 801 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */); 802 } 803 fdc->state = DEVIDLE; 804 805 /* reset controller, turn motor off, clear fdout mirror reg */ 806 fdout_wr(fdc, ((fdc->fdout = 0))); 807 bioq_init(&fdc->bio_queue); 808 809 /* 810 * Probe and attach any children. We should probably detect 811 * devices from the BIOS unless overridden. 812 */ 813 for (i = resource_query_string(-1, "at", device_get_nameunit(dev)); 814 i != -1; 815 i = resource_query_string(i, "at", device_get_nameunit(dev))) 816 fdc_add_child(dev, resource_query_name(i), 817 resource_query_unit(i)); 818 819 return (bus_generic_attach(dev)); 820 } 821 822 int 823 fdc_print_child(device_t me, device_t child) 824 { 825 int retval = 0; 826 827 retval += bus_print_child_header(me, child); 828 retval += kprintf(" on %s drive %d\n", device_get_nameunit(me), 829 fdc_get_fdunit(child)); 830 831 return (retval); 832 } 833 834 static device_method_t fdc_methods[] = { 835 /* Device interface */ 836 DEVMETHOD(device_probe, fdc_probe), 837 DEVMETHOD(device_attach, fdc_attach), 838 DEVMETHOD(device_detach, bus_generic_detach), 839 DEVMETHOD(device_shutdown, bus_generic_shutdown), 840 DEVMETHOD(device_suspend, bus_generic_suspend), 841 DEVMETHOD(device_resume, bus_generic_resume), 842 843 /* Bus interface */ 844 DEVMETHOD(bus_print_child, fdc_print_child), 845 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 846 /* Our children never use any other bus interface methods. */ 847 848 { 0, 0 } 849 }; 850 851 static driver_t fdc_driver = { 852 "fdc", 853 fdc_methods, 854 sizeof(struct fdc_data) 855 }; 856 857 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 858 859 /******************************************************************/ 860 /* 861 * devices attached to the controller section. 862 */ 863 static int 864 fd_probe(device_t dev) 865 { 866 int i; 867 u_int fdt, st0, st3; 868 struct fd_data *fd; 869 struct fdc_data *fdc; 870 fdsu_t fdsu; 871 static int fd_fifo = 0; 872 873 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 874 fd = device_get_softc(dev); 875 fdc = device_get_softc(device_get_parent(dev)); 876 877 bzero(fd, sizeof *fd); 878 fd->dev = dev; 879 fd->fdc = fdc; 880 fd->fdsu = fdsu; 881 fd->fdu = device_get_unit(dev); 882 883 #ifdef __i386__ 884 /* look up what bios thinks we have */ 885 switch (fd->fdu) { 886 case 0: 887 if ((fdc->flags & FDC_ISPCMCIA)) 888 fdt = RTCFDT_144M; 889 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0) 890 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED; 891 else 892 fdt = (rtcin(RTC_FDISKETTE) & 0xf0); 893 break; 894 case 1: 895 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0); 896 break; 897 default: 898 fdt = RTCFDT_NONE; 899 break; 900 } 901 #else 902 fdt = RTCFDT_144M; /* XXX probably */ 903 #endif 904 905 /* is there a unit? */ 906 if (fdt == RTCFDT_NONE) 907 return (ENXIO); 908 909 /* select it */ 910 set_motor(fdc, fdsu, TURNON); 911 DELAY(1000000); /* 1 sec */ 912 913 /* XXX This doesn't work before the first set_motor() */ 914 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN 915 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 916 && enable_fifo(fdc) == 0) { 917 device_printf(device_get_parent(dev), 918 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 919 } 920 fd_fifo = 1; 921 922 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) 923 && (st3 & NE7_ST3_T0)) { 924 /* if at track 0, first seek inwards */ 925 /* seek some steps: */ 926 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0); 927 DELAY(300000); /* ...wait a moment... */ 928 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */ 929 } 930 931 /* If we're at track 0 first seek inwards. */ 932 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) { 933 /* Seek some steps... */ 934 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 935 /* ...wait a moment... */ 936 DELAY(300000); 937 /* make ctrlr happy: */ 938 fd_sense_int(fdc, 0, 0); 939 } 940 } 941 942 for (i = 0; i < 2; i++) { 943 /* 944 * we must recalibrate twice, just in case the 945 * heads have been beyond cylinder 76, since most 946 * FDCs still barf when attempting to recalibrate 947 * more than 77 steps 948 */ 949 /* go back to 0: */ 950 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 951 /* a second being enough for full stroke seek*/ 952 DELAY(i == 0 ? 1000000 : 300000); 953 954 /* anything responding? */ 955 if (fd_sense_int(fdc, &st0, 0) == 0 && 956 (st0 & NE7_ST0_EC) == 0) 957 break; /* already probed succesfully */ 958 } 959 } 960 961 set_motor(fdc, fdsu, TURNOFF); 962 963 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */ 964 return (ENXIO); 965 966 fd->track = FD_NO_TRACK; 967 fd->fdc = fdc; 968 fd->fdsu = fdsu; 969 fd->options = 0; 970 callout_init(&fd->toffhandle); 971 callout_init(&fd->tohandle); 972 callout_init(&fd->motor); 973 974 switch (fdt) { 975 case RTCFDT_12M: 976 device_set_desc(dev, "1200-KB 5.25\" drive"); 977 fd->type = FD_1200; 978 break; 979 case RTCFDT_144M | RTCFDT_144M_PRETENDED: 980 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive"); 981 fdt = RTCFDT_144M; 982 fd->type = FD_1440; 983 case RTCFDT_144M: 984 device_set_desc(dev, "1440-KB 3.5\" drive"); 985 fd->type = FD_1440; 986 break; 987 case RTCFDT_288M: 988 case RTCFDT_288M_1: 989 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 990 fd->type = FD_1440; 991 break; 992 case RTCFDT_360K: 993 device_set_desc(dev, "360-KB 5.25\" drive"); 994 fd->type = FD_360; 995 break; 996 case RTCFDT_720K: 997 kprintf("720-KB 3.5\" drive"); 998 fd->type = FD_720; 999 break; 1000 default: 1001 return (ENXIO); 1002 } 1003 fd->ft = fd_types[fd->type - 1]; 1004 return (0); 1005 } 1006 1007 static int 1008 fd_attach(device_t dev) 1009 { 1010 struct fd_data *fd; 1011 1012 fd = device_get_softc(dev); 1013 1014 disk_create(fd->fdu, &fd->disk, &fd_ops); 1015 1016 /* 1017 * Make special raw floppy devices with preset types to 1018 * make formatting easier. These override the disk management 1019 * layer for the whole-slice-disk for partitions 128-191. Note 1020 * that we do not override partition 255, which is the 1021 * whole-slice-part. If we did we would have to provide our 1022 * own DIOCGPART ioctl. 1023 */ 1024 dev_ops_add(&fd_ops, 1025 dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64), 1026 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128)); 1027 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 1), 1028 UID_ROOT, GID_WHEEL, 0600, "fd%d.1720", fd->fdu); 1029 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 2), 1030 UID_ROOT, GID_WHEEL, 0600, "fd%d.1480", fd->fdu); 1031 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 3), 1032 UID_ROOT, GID_WHEEL, 0600, "fd%d.1440", fd->fdu); 1033 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 4), 1034 UID_ROOT, GID_WHEEL, 0600, "fd%d.1200", fd->fdu); 1035 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 5), 1036 UID_ROOT, GID_WHEEL, 0600, "fd%d.820", fd->fdu); 1037 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 6), 1038 UID_ROOT, GID_WHEEL, 0600, "fd%d.800", fd->fdu); 1039 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 7), 1040 UID_ROOT, GID_WHEEL, 0600, "fd%d.720", fd->fdu); 1041 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 8), 1042 UID_ROOT, GID_WHEEL, 0600, "fd%d.360", fd->fdu); 1043 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 9), 1044 UID_ROOT, GID_WHEEL, 0600, "fd%d.640", fd->fdu); 1045 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 10), 1046 UID_ROOT, GID_WHEEL, 0600, "fd%d.1232", fd->fdu); 1047 1048 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1049 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS, 1050 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1051 DEVSTAT_PRIORITY_FD); 1052 return (0); 1053 } 1054 1055 static int 1056 fd_detach(device_t dev) 1057 { 1058 struct fd_data *fd; 1059 1060 fd = device_get_softc(dev); 1061 dev_ops_remove(&fd_ops, 1062 dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64), 1063 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128)); 1064 disk_invalidate(&fd->disk); 1065 disk_destroy(&fd->disk); 1066 devstat_remove_entry(&fd->device_stats); 1067 callout_stop(&fd->toffhandle); 1068 callout_stop(&fd->motor); 1069 1070 return (0); 1071 } 1072 1073 static device_method_t fd_methods[] = { 1074 /* Device interface */ 1075 DEVMETHOD(device_probe, fd_probe), 1076 DEVMETHOD(device_attach, fd_attach), 1077 DEVMETHOD(device_detach, fd_detach), 1078 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1079 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1080 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1081 1082 { 0, 0 } 1083 }; 1084 1085 static driver_t fd_driver = { 1086 "fd", 1087 fd_methods, 1088 sizeof(struct fd_data) 1089 }; 1090 1091 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1092 1093 /****************************************************************************/ 1094 /* motor control stuff */ 1095 /* remember to not deselect the drive we're working on */ 1096 /****************************************************************************/ 1097 static void 1098 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1099 { 1100 int fdout = fdc->fdout; 1101 int needspecify = 0; 1102 1103 if(turnon) { 1104 fdout &= ~FDO_FDSEL; 1105 fdout |= (FDO_MOEN0 << fdsu) + fdsu; 1106 } else 1107 fdout &= ~(FDO_MOEN0 << fdsu); 1108 1109 if(!turnon 1110 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0) 1111 /* gonna turn off the last drive, put FDC to bed */ 1112 fdout &= ~ (FDO_FRST|FDO_FDMAEN); 1113 else { 1114 /* make sure controller is selected and specified */ 1115 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0) 1116 needspecify = 1; 1117 fdout |= (FDO_FRST|FDO_FDMAEN); 1118 } 1119 1120 fdout_wr(fdc, fdout); 1121 fdc->fdout = fdout; 1122 TRACE1("[0x%x->FDOUT]", fdout); 1123 1124 if (needspecify) { 1125 /* 1126 * XXX 1127 * special case: since we have just woken up the FDC 1128 * from its sleep, we silently assume the command will 1129 * be accepted, and do not test for a timeout 1130 */ 1131 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1132 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1133 0); 1134 if (fdc->flags & FDC_HAS_FIFO) 1135 (void) enable_fifo(fdc); 1136 } 1137 } 1138 1139 static void 1140 fd_turnoff(void *xfd) 1141 { 1142 fd_p fd = xfd; 1143 1144 TRACE1("[fd%d: turnoff]", fd->fdu); 1145 1146 crit_enter(); 1147 /* 1148 * Don't turn off the motor yet if the drive is active. 1149 * 1150 * If we got here, this could only mean we missed an interrupt. 1151 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1152 * after a controller reset. Just schedule a pseudo-interrupt 1153 * so the state machine gets re-entered. 1154 */ 1155 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1156 fdc_intr(fd->fdc); 1157 crit_exit(); 1158 return; 1159 } 1160 1161 fd->flags &= ~FD_MOTOR; 1162 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1163 crit_exit(); 1164 } 1165 1166 static void 1167 fd_motor_on(void *xfd) 1168 { 1169 fd_p fd = xfd; 1170 1171 crit_enter(); 1172 fd->flags &= ~FD_MOTOR_WAIT; 1173 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1174 { 1175 fdc_intr(fd->fdc); 1176 } 1177 crit_exit(); 1178 } 1179 1180 static void 1181 fd_turnon(fd_p fd) 1182 { 1183 if(!(fd->flags & FD_MOTOR)) 1184 { 1185 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1186 set_motor(fd->fdc, fd->fdsu, TURNON); 1187 callout_reset(&fd->motor, hz, fd_motor_on, fd); 1188 } 1189 } 1190 1191 static void 1192 fdc_reset(fdc_p fdc) 1193 { 1194 /* Try a reset, keep motor on */ 1195 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1196 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1197 DELAY(100); 1198 /* enable FDC, but defer interrupts a moment */ 1199 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1200 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1201 DELAY(100); 1202 fdout_wr(fdc, fdc->fdout); 1203 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1204 1205 /* XXX after a reset, silently believe the FDC will accept commands */ 1206 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1207 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1208 0); 1209 if (fdc->flags & FDC_HAS_FIFO) 1210 (void) enable_fifo(fdc); 1211 } 1212 1213 /****************************************************************************/ 1214 /* fdc in/out */ 1215 /****************************************************************************/ 1216 /* 1217 * FDC IO functions, take care of the main status register, timeout 1218 * in case the desired status bits are never set. 1219 * 1220 * These PIO loops initially start out with short delays between 1221 * each iteration in the expectation that the required condition 1222 * is usually met quickly, so it can be handled immediately. After 1223 * about 1 ms, stepping is increased to achieve a better timing 1224 * accuracy in the calls to DELAY(). 1225 */ 1226 static int 1227 fd_in(struct fdc_data *fdc, int *ptr) 1228 { 1229 int i, j, step; 1230 1231 for (j = 0, step = 1; 1232 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) && 1233 j < FDSTS_TIMEOUT; 1234 j += step) { 1235 if (i == NE7_RQM) 1236 return (fdc_err(fdc, "ready for output in input\n")); 1237 if (j == 1000) 1238 step = 1000; 1239 DELAY(step); 1240 } 1241 if (j >= FDSTS_TIMEOUT) 1242 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); 1243 #ifdef FDC_DEBUG 1244 i = fddata_rd(fdc); 1245 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1246 *ptr = i; 1247 return (0); 1248 #else /* !FDC_DEBUG */ 1249 i = fddata_rd(fdc); 1250 if (ptr) 1251 *ptr = i; 1252 return (0); 1253 #endif /* FDC_DEBUG */ 1254 } 1255 1256 static int 1257 out_fdc(struct fdc_data *fdc, int x) 1258 { 1259 int i, j, step; 1260 1261 for (j = 0, step = 1; 1262 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM && 1263 j < FDSTS_TIMEOUT; 1264 j += step) { 1265 if (i == (NE7_DIO|NE7_RQM)) 1266 return (fdc_err(fdc, "ready for input in output\n")); 1267 if (j == 1000) 1268 step = 1000; 1269 DELAY(step); 1270 } 1271 if (j >= FDSTS_TIMEOUT) 1272 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); 1273 1274 /* Send the command and return */ 1275 fddata_wr(fdc, x); 1276 TRACE1("[0x%x->FDDATA]", x); 1277 return (0); 1278 } 1279 1280 /****************************************************************************/ 1281 /* fdopen/fdclose */ 1282 /****************************************************************************/ 1283 int 1284 Fdopen(struct dev_open_args *ap) 1285 { 1286 cdev_t dev = ap->a_head.a_dev; 1287 fdu_t fdu = dkunit(dev); 1288 struct disk_info info; 1289 struct fd_type *ft; 1290 int type; 1291 int changetype; 1292 fd_p fd; 1293 fdc_p fdc; 1294 1295 /* check bounds */ 1296 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1297 return (ENXIO); 1298 fdc = fd->fdc; 1299 if ((fdc == NULL) || (fd->type == NO_TYPE)) 1300 return (ENXIO); 1301 1302 /* 1303 * Figure out the type of floppy. There are special whole-disk-device 1304 * overrides that will override the current type. 1305 */ 1306 type = dkpart(dev); 1307 if (type == WHOLE_SLICE_PART) { 1308 type = fd->type; /* do not change selected type data */ 1309 changetype = 0; 1310 } else if (type > 128) { 1311 type -= 128; /* set to specific format */ 1312 changetype = 1; 1313 } else { 1314 type = fd->type; /* reset to default */ 1315 changetype = 1; 1316 } 1317 if (type > NUMDENS) 1318 return (ENXIO); 1319 if (type != fd->type) { 1320 /* 1321 * For each type of basic drive, make sure we are trying 1322 * to open a type it can do, 1323 */ 1324 switch (fd->type) { 1325 case FD_360: 1326 return (ENXIO); 1327 case FD_720: 1328 if ( type != FD_820 1329 && type != FD_800 1330 && type != FD_640 1331 ) 1332 return (ENXIO); 1333 break; 1334 case FD_1200: 1335 switch (type) { 1336 case FD_1480: 1337 type = FD_1480in5_25; 1338 break; 1339 case FD_1440: 1340 type = FD_1440in5_25; 1341 break; 1342 case FD_1232: 1343 break; 1344 case FD_820: 1345 type = FD_820in5_25; 1346 break; 1347 case FD_800: 1348 type = FD_800in5_25; 1349 break; 1350 case FD_720: 1351 type = FD_720in5_25; 1352 break; 1353 case FD_640: 1354 type = FD_640in5_25; 1355 break; 1356 case FD_360: 1357 type = FD_360in5_25; 1358 break; 1359 default: 1360 return(ENXIO); 1361 } 1362 break; 1363 case FD_1440: 1364 if ( type != FD_1720 1365 && type != FD_1480 1366 && type != FD_1200 1367 && type != FD_820 1368 && type != FD_800 1369 && type != FD_720 1370 && type != FD_640 1371 ) 1372 return(ENXIO); 1373 break; 1374 } 1375 } 1376 1377 /* 1378 * fd->type is the basic drive type, not the current format 1379 * we are reading. We only change the type when opening the 1380 * whole-slice-partition 1381 */ 1382 if (changetype) 1383 fd->ft = fd_types[type - 1]; 1384 fd->flags |= FD_OPEN; 1385 1386 /* 1387 * Clearing the DMA overrun counter at open time is a bit messy. 1388 * Since we're only managing one counter per controller, opening 1389 * the second drive could mess it up. Anyway, if the DMA overrun 1390 * condition is really persistent, it will eventually time out 1391 * still. OTOH, clearing it here will ensure we'll at least start 1392 * trying again after a previous (maybe even long ago) failure. 1393 * Also, this is merely a stop-gap measure only that should not 1394 * happen during normal operation, so we can tolerate it to be a 1395 * bit sloppy about this. 1396 */ 1397 fdc->dma_overruns = 0; 1398 1399 /* 1400 * Set disk parameters for the disk management layer. 1401 * 1402 * Note that we do not set RAWEXTENSIONS here. We override 1403 * the minor numbers in the raw-extension range and handle them 1404 * directly. 1405 */ 1406 bzero(&info, sizeof(info)); 1407 ft = &fd->ft; 1408 info.d_media_blksize = 128 << ft->secsize; 1409 info.d_media_blocks = ft->size; 1410 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR; 1411 info.d_nheads = ft->heads; 1412 info.d_secpertrack = ft->sectrac; 1413 info.d_secpercyl = ft->sectrac * ft->heads; 1414 info.d_ncylinders = ft->size / info.d_secpercyl; 1415 disk_setdiskinfo(&fd->disk, &info); 1416 1417 return 0; 1418 } 1419 1420 int 1421 fdclose(struct dev_close_args *ap) 1422 { 1423 cdev_t dev = ap->a_head.a_dev; 1424 fdu_t fdu = dkunit(dev); 1425 struct fd_data *fd; 1426 1427 fd = devclass_get_softc(fd_devclass, fdu); 1428 fd->flags &= ~FD_OPEN; 1429 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG); 1430 1431 return (0); 1432 } 1433 1434 /****************************************************************************/ 1435 /* fdstrategy */ 1436 /****************************************************************************/ 1437 int 1438 fdstrategy(struct dev_strategy_args *ap) 1439 { 1440 cdev_t dev = ap->a_head.a_dev; 1441 struct bio *bio = ap->a_bio; 1442 struct buf *bp = bio->bio_buf; 1443 unsigned nblocks, blknum, cando; 1444 fdu_t fdu; 1445 fdc_p fdc; 1446 fd_p fd; 1447 size_t fdblk; 1448 1449 fdu = dkunit(dev); 1450 fd = devclass_get_softc(fd_devclass, fdu); 1451 if (fd == 0) 1452 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1453 (u_long)major(dev), (u_long)minor(dev)); 1454 fdc = fd->fdc; 1455 if (fd->type == NO_TYPE) { 1456 bp->b_error = ENXIO; 1457 bp->b_flags |= B_ERROR; 1458 goto bad; 1459 }; 1460 1461 fdblk = 128 << (fd->ft.secsize); 1462 if (bp->b_cmd != BUF_CMD_FORMAT) { 1463 if (bio->bio_offset < 0) { 1464 kprintf( 1465 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n", 1466 fdu, bio->bio_offset, bp->b_bcount); 1467 bp->b_error = EINVAL; 1468 bp->b_flags |= B_ERROR; 1469 goto bad; 1470 } 1471 if ((bp->b_bcount % fdblk) != 0) { 1472 bp->b_error = EINVAL; 1473 bp->b_flags |= B_ERROR; 1474 goto bad; 1475 } 1476 } 1477 1478 /* 1479 * Set up block calculations. 1480 */ 1481 if (bio->bio_offset > 20000000LL * fdblk) { 1482 /* 1483 * Reject unreasonably high block number, prevent the 1484 * multiplication below from overflowing. 1485 */ 1486 bp->b_error = EINVAL; 1487 bp->b_flags |= B_ERROR; 1488 goto bad; 1489 } 1490 blknum = (unsigned)(bio->bio_offset / fdblk); 1491 nblocks = fd->ft.size; 1492 bp->b_resid = 0; 1493 if (blknum + (bp->b_bcount / fdblk) > nblocks) { 1494 if (blknum <= nblocks) { 1495 cando = (nblocks - blknum) * fdblk; 1496 bp->b_resid = bp->b_bcount - cando; 1497 if (cando == 0) 1498 goto bad; /* not actually bad but EOF */ 1499 } else { 1500 bp->b_error = EINVAL; 1501 bp->b_flags |= B_ERROR; 1502 goto bad; 1503 } 1504 } 1505 crit_enter(); 1506 bio->bio_driver_info = dev; 1507 bioqdisksort(&fdc->bio_queue, bio); 1508 callout_stop(&fd->toffhandle); 1509 1510 /* Tell devstat we are starting on the transaction */ 1511 devstat_start_transaction(&fd->device_stats); 1512 device_busy(fd->dev); 1513 1514 fdstart(fdc); 1515 crit_exit(); 1516 return(0); 1517 1518 bad: 1519 biodone(bio); 1520 return(0); 1521 } 1522 1523 /***************************************************************\ 1524 * fdstart * 1525 * We have just queued something.. if the controller is not busy * 1526 * then simulate the case where it has just finished a command * 1527 * So that it (the interrupt routine) looks on the queue for more* 1528 * work to do and picks up what we just added. * 1529 * If the controller is already busy, we need do nothing, as it * 1530 * will pick up our work when the present work completes * 1531 \***************************************************************/ 1532 static void 1533 fdstart(struct fdc_data *fdc) 1534 { 1535 crit_enter(); 1536 if(fdc->state == DEVIDLE) 1537 { 1538 fdc_intr(fdc); 1539 } 1540 crit_exit(); 1541 } 1542 1543 static void 1544 fd_iotimeout(void *xfdc) 1545 { 1546 fdc_p fdc; 1547 1548 fdc = xfdc; 1549 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1550 1551 /* 1552 * Due to IBM's brain-dead design, the FDC has a faked ready 1553 * signal, hardwired to ready == true. Thus, any command 1554 * issued if there's no diskette in the drive will _never_ 1555 * complete, and must be aborted by resetting the FDC. 1556 * Many thanks, Big Blue! 1557 * The FDC must not be reset directly, since that would 1558 * interfere with the state machine. Instead, pretend that 1559 * the command completed but was invalid. The state machine 1560 * will reset the FDC and retry once. 1561 */ 1562 crit_enter(); 1563 fdc->status[0] = NE7_ST0_IC_IV; 1564 fdc->flags &= ~FDC_STAT_VALID; 1565 fdc->state = IOTIMEDOUT; 1566 fdc_intr(fdc); 1567 crit_exit(); 1568 } 1569 1570 /* just ensure it is running in a critical section */ 1571 static void 1572 fd_pseudointr(void *xfdc) 1573 { 1574 crit_enter(); 1575 fdc_intr(xfdc); 1576 crit_exit(); 1577 } 1578 1579 /***********************************************************************\ 1580 * fdintr * 1581 * keep calling the state machine until it returns a 0 * 1582 * ALWAYS called at SPLBIO * 1583 \***********************************************************************/ 1584 static void 1585 fdc_intr(void *xfdc) 1586 { 1587 fdc_p fdc = xfdc; 1588 while(fdstate(fdc)) 1589 ; 1590 } 1591 1592 /* 1593 * magic pseudo-DMA initialization for YE FDC. Sets count and 1594 * direction 1595 */ 1596 #define SET_BCDR(fdc,wr,cnt,port) \ 1597 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1598 ((cnt)-1) & 0xff); \ 1599 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1600 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1601 1602 /* 1603 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy 1604 */ 1605 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count) 1606 { 1607 u_char *cptr = (u_char *)addr; 1608 1609 if (cmd == BUF_CMD_READ) { 1610 if (fdc->state != PIOREAD) { 1611 fdc->state = PIOREAD; 1612 return(0); 1613 }; 1614 SET_BCDR(fdc, 0, count, 0); 1615 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1616 FDC_YE_DATAPORT, cptr, count); 1617 } else { 1618 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1619 FDC_YE_DATAPORT, cptr, count); 1620 SET_BCDR(fdc, 0, count, 0); 1621 }; 1622 return(1); 1623 } 1624 1625 /***********************************************************************\ 1626 * The controller state machine. * 1627 * if it returns a non zero value, it should be called again immediatly * 1628 \***********************************************************************/ 1629 static int 1630 fdstate(fdc_p fdc) 1631 { 1632 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3; 1633 unsigned blknum = 0, b_cylinder = 0; 1634 fdu_t fdu = fdc->fdu; 1635 fd_p fd; 1636 struct bio *bio; 1637 struct buf *bp; 1638 struct fd_formb *finfo = NULL; 1639 size_t fdblk; 1640 cdev_t dev; 1641 1642 bio = fdc->bio; 1643 if (bio == NULL) { 1644 bio = bioq_first(&fdc->bio_queue); 1645 if (bio != NULL) { 1646 bioq_remove(&fdc->bio_queue, bio); 1647 fdc->bio = bio; 1648 } 1649 } 1650 if (bio == NULL) { 1651 /***********************************************\ 1652 * nothing left for this controller to do * 1653 * Force into the IDLE state, * 1654 \***********************************************/ 1655 fdc->state = DEVIDLE; 1656 if (fdc->fd) { 1657 device_printf(fdc->fdc_dev, 1658 "unexpected valid fd pointer\n"); 1659 fdc->fd = (fd_p) 0; 1660 fdc->fdu = -1; 1661 } 1662 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1663 return (0); 1664 } 1665 bp = bio->bio_buf; 1666 dev = bio->bio_driver_info; 1667 1668 fdu = dkunit(dev); 1669 fd = devclass_get_softc(fd_devclass, fdu); 1670 fdblk = 128 << fd->ft.secsize; 1671 if (fdc->fd && (fd != fdc->fd)) 1672 device_printf(fd->dev, "confused fd pointers\n"); 1673 read = (bp->b_cmd == BUF_CMD_READ); 1674 format = (bp->b_cmd == BUF_CMD_FORMAT); 1675 if (format) { 1676 finfo = (struct fd_formb *)bp->b_data; 1677 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 1678 - (char *)finfo; 1679 } 1680 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) { 1681 blknum = (unsigned)(bio->bio_offset / fdblk) + 1682 fd->skip /fdblk; 1683 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads); 1684 } 1685 TRACE1("fd%d", fdu); 1686 TRACE1("[%s]", fdstates[fdc->state]); 1687 TRACE1("(0x%x)", fd->flags); 1688 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd); 1689 switch (fdc->state) 1690 { 1691 case DEVIDLE: 1692 case FINDWORK: /* we have found new work */ 1693 fdc->retry = 0; 1694 fd->skip = 0; 1695 fdc->fd = fd; 1696 fdc->fdu = fdu; 1697 fdc->fdctl_wr(fdc, fd->ft.trans); 1698 TRACE1("[0x%x->FDCTL]", fd->ft.trans); 1699 /*******************************************************\ 1700 * If the next drive has a motor startup pending, then * 1701 * it will start up in its own good time * 1702 \*******************************************************/ 1703 if(fd->flags & FD_MOTOR_WAIT) { 1704 fdc->state = MOTORWAIT; 1705 return (0); /* come back later */ 1706 } 1707 /*******************************************************\ 1708 * Maybe if it's not starting, it SHOULD be starting * 1709 \*******************************************************/ 1710 if (!(fd->flags & FD_MOTOR)) 1711 { 1712 fdc->state = MOTORWAIT; 1713 fd_turnon(fd); 1714 return (0); 1715 } 1716 else /* at least make sure we are selected */ 1717 { 1718 set_motor(fdc, fd->fdsu, TURNON); 1719 } 1720 if (fdc->flags & FDC_NEEDS_RESET) { 1721 fdc->state = RESETCTLR; 1722 fdc->flags &= ~FDC_NEEDS_RESET; 1723 } else 1724 fdc->state = DOSEEK; 1725 break; 1726 case DOSEEK: 1727 if (b_cylinder == (unsigned)fd->track) 1728 { 1729 fdc->state = SEEKCOMPLETE; 1730 break; 1731 } 1732 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 1733 fd->fdsu, b_cylinder * fd->ft.steptrac, 1734 0)) 1735 { 1736 /* 1737 * seek command not accepted, looks like 1738 * the FDC went off to the Saints... 1739 */ 1740 fdc->retry = 6; /* try a reset */ 1741 return(retrier(fdc)); 1742 } 1743 fd->track = FD_NO_TRACK; 1744 fdc->state = SEEKWAIT; 1745 return(0); /* will return later */ 1746 case SEEKWAIT: 1747 /* allow heads to settle */ 1748 callout_reset(&fdc->pseudointr_ch, hz / 16, 1749 fd_pseudointr, fdc); 1750 fdc->state = SEEKCOMPLETE; 1751 return(0); /* will return later */ 1752 case SEEKCOMPLETE : /* SEEK DONE, START DMA */ 1753 /* Make sure seek really happened*/ 1754 if(fd->track == FD_NO_TRACK) { 1755 int descyl = b_cylinder * fd->ft.steptrac; 1756 do { 1757 /* 1758 * This might be a "ready changed" interrupt, 1759 * which cannot really happen since the 1760 * RDY pin is hardwired to + 5 volts. This 1761 * generally indicates a "bouncing" intr 1762 * line, so do one of the following: 1763 * 1764 * When running on an enhanced FDC that is 1765 * known to not go stuck after responding 1766 * with INVALID, fetch all interrupt states 1767 * until seeing either an INVALID or a 1768 * real interrupt condition. 1769 * 1770 * When running on a dumb old NE765, give 1771 * up immediately. The controller will 1772 * provide up to four dummy RC interrupt 1773 * conditions right after reset (for the 1774 * corresponding four drives), so this is 1775 * our only chance to get notice that it 1776 * was not the FDC that caused the interrupt. 1777 */ 1778 if (fd_sense_int(fdc, &st0, &cyl) 1779 == FD_NOT_VALID) 1780 return 0; 1781 if(fdc->fdct == FDC_NE765 1782 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1783 return 0; /* hope for a real intr */ 1784 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1785 1786 if (0 == descyl) { 1787 int failed = 0; 1788 /* 1789 * seek to cyl 0 requested; make sure we are 1790 * really there 1791 */ 1792 if (fd_sense_drive_status(fdc, &st3)) 1793 failed = 1; 1794 if ((st3 & NE7_ST3_T0) == 0) { 1795 kprintf( 1796 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 1797 fdu, st3, NE7_ST3BITS); 1798 failed = 1; 1799 } 1800 1801 if (failed) { 1802 if(fdc->retry < 3) 1803 fdc->retry = 3; 1804 return (retrier(fdc)); 1805 } 1806 } 1807 1808 if (cyl != descyl) { 1809 kprintf( 1810 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 1811 fdu, descyl, cyl, st0); 1812 if (fdc->retry < 3) 1813 fdc->retry = 3; 1814 return (retrier(fdc)); 1815 } 1816 } 1817 1818 fd->track = b_cylinder; 1819 if (!(fdc->flags & FDC_NODMA)) { 1820 isa_dmastart(isa_dmabp(bp), 1821 bp->b_data+fd->skip, 1822 format ? bp->b_bcount : fdblk, fdc->dmachan); 1823 } 1824 sectrac = fd->ft.sectrac; 1825 sec = blknum % (sectrac * fd->ft.heads); 1826 head = sec / sectrac; 1827 sec = sec % sectrac + 1; 1828 fd->hddrv = ((head&1)<<2)+fdu; 1829 1830 if(format || !read) 1831 { 1832 /* make sure the drive is writable */ 1833 if(fd_sense_drive_status(fdc, &st3) != 0) 1834 { 1835 /* stuck controller? */ 1836 if (!(fdc->flags & FDC_NODMA)) 1837 isa_dmadone(isa_dmabp(bp), 1838 bp->b_data + fd->skip, 1839 format ? bp->b_bcount : fdblk, 1840 fdc->dmachan); 1841 fdc->retry = 6; /* reset the beast */ 1842 return (retrier(fdc)); 1843 } 1844 if(st3 & NE7_ST3_WP) 1845 { 1846 /* 1847 * XXX YES! this is ugly. 1848 * in order to force the current operation 1849 * to fail, we will have to fake an FDC 1850 * error - all error handling is done 1851 * by the retrier() 1852 */ 1853 fdc->status[0] = NE7_ST0_IC_AT; 1854 fdc->status[1] = NE7_ST1_NW; 1855 fdc->status[2] = 0; 1856 fdc->status[3] = fd->track; 1857 fdc->status[4] = head; 1858 fdc->status[5] = sec; 1859 fdc->retry = 8; /* break out immediately */ 1860 fdc->state = IOTIMEDOUT; /* not really... */ 1861 return (1); 1862 } 1863 } 1864 1865 if (format) { 1866 if (fdc->flags & FDC_NODMA) { 1867 /* 1868 * This seems to be necessary for 1869 * whatever obscure reason; if we omit 1870 * it, we end up filling the sector ID 1871 * fields of the newly formatted track 1872 * entirely with garbage, causing 1873 * `wrong cylinder' errors all over 1874 * the place when trying to read them 1875 * back. 1876 * 1877 * Umpf. 1878 */ 1879 SET_BCDR(fdc, 1, bp->b_bcount, 0); 1880 1881 (void)fdcpio(fdc,bp->b_cmd, 1882 bp->b_data+fd->skip, 1883 bp->b_bcount); 1884 1885 } 1886 /* formatting */ 1887 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu, 1888 finfo->fd_formb_secshift, 1889 finfo->fd_formb_nsecs, 1890 finfo->fd_formb_gaplen, 1891 finfo->fd_formb_fillbyte, 0)) { 1892 /* controller fell over */ 1893 if (!(fdc->flags & FDC_NODMA)) 1894 isa_dmadone(isa_dmabp(bp), 1895 bp->b_data + fd->skip, 1896 format ? bp->b_bcount : fdblk, 1897 fdc->dmachan); 1898 fdc->retry = 6; 1899 return (retrier(fdc)); 1900 } 1901 } else { 1902 if (fdc->flags & FDC_NODMA) { 1903 /* 1904 * this seems to be necessary even when 1905 * reading data 1906 */ 1907 SET_BCDR(fdc, 1, fdblk, 0); 1908 1909 /* 1910 * perform the write pseudo-DMA before 1911 * the WRITE command is sent 1912 */ 1913 if (!read) 1914 (void)fdcpio(fdc,bp->b_cmd, 1915 bp->b_data+fd->skip, 1916 fdblk); 1917 } 1918 if (fd_cmd(fdc, 9, 1919 (read ? NE7CMD_READ : NE7CMD_WRITE), 1920 head << 2 | fdu, /* head & unit */ 1921 fd->track, /* track */ 1922 head, 1923 sec, /* sector + 1 */ 1924 fd->ft.secsize, /* sector size */ 1925 sectrac, /* sectors/track */ 1926 fd->ft.gap, /* gap size */ 1927 fd->ft.datalen, /* data length */ 1928 0)) { 1929 /* the beast is sleeping again */ 1930 if (!(fdc->flags & FDC_NODMA)) 1931 isa_dmadone(isa_dmabp(bp), 1932 bp->b_data + fd->skip, 1933 format ? bp->b_bcount : fdblk, 1934 fdc->dmachan); 1935 fdc->retry = 6; 1936 return (retrier(fdc)); 1937 } 1938 } 1939 if (fdc->flags & FDC_NODMA) 1940 /* 1941 * if this is a read, then simply await interrupt 1942 * before performing PIO 1943 */ 1944 if (read && !fdcpio(fdc,bp->b_cmd, 1945 bp->b_data+fd->skip,fdblk)) { 1946 callout_reset(&fd->tohandle, hz, 1947 fd_iotimeout, fdc); 1948 return(0); /* will return later */ 1949 }; 1950 1951 /* 1952 * write (or format) operation will fall through and 1953 * await completion interrupt 1954 */ 1955 fdc->state = IOCOMPLETE; 1956 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc); 1957 return (0); /* will return later */ 1958 case PIOREAD: 1959 /* 1960 * actually perform the PIO read. The IOCOMPLETE case 1961 * removes the timeout for us. 1962 */ 1963 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk); 1964 fdc->state = IOCOMPLETE; 1965 /* FALLTHROUGH */ 1966 case IOCOMPLETE: /* IO DONE, post-analyze */ 1967 callout_stop(&fd->tohandle); 1968 1969 if (fd_read_status(fdc, fd->fdsu)) { 1970 if (!(fdc->flags & FDC_NODMA)) { 1971 isa_dmadone(isa_dmabp(bp), 1972 bp->b_data + fd->skip, 1973 format ? bp->b_bcount : fdblk, 1974 fdc->dmachan); 1975 } 1976 if (fdc->retry < 6) 1977 fdc->retry = 6; /* force a reset */ 1978 return (retrier(fdc)); 1979 } 1980 1981 fdc->state = IOTIMEDOUT; 1982 1983 /* FALLTHROUGH */ 1984 1985 case IOTIMEDOUT: 1986 if (!(fdc->flags & FDC_NODMA)) { 1987 isa_dmadone(isa_dmabp(bp), 1988 bp->b_data + fd->skip, 1989 format ? bp->b_bcount : fdblk, fdc->dmachan); 1990 } 1991 if (fdc->status[0] & NE7_ST0_IC) { 1992 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1993 && fdc->status[1] & NE7_ST1_OR) { 1994 /* 1995 * DMA overrun. Someone hogged the bus and 1996 * didn't release it in time for the next 1997 * FDC transfer. 1998 * 1999 * We normally restart this without bumping 2000 * the retry counter. However, in case 2001 * something is seriously messed up (like 2002 * broken hardware), we rather limit the 2003 * number of retries so the IO operation 2004 * doesn't block indefinately. 2005 */ 2006 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 2007 fdc->state = SEEKCOMPLETE; 2008 return (1); 2009 } /* else fall through */ 2010 } 2011 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 2012 && fdc->retry < 6) 2013 fdc->retry = 6; /* force a reset */ 2014 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2015 && fdc->status[2] & NE7_ST2_WC 2016 && fdc->retry < 3) 2017 fdc->retry = 3; /* force recalibrate */ 2018 return (retrier(fdc)); 2019 } 2020 /* All OK */ 2021 /* Operation successful, retry DMA overruns again next time. */ 2022 fdc->dma_overruns = 0; 2023 fd->skip += fdblk; 2024 if (!format && fd->skip < bp->b_bcount - bp->b_resid) { 2025 /* set up next transfer */ 2026 fdc->state = DOSEEK; 2027 } else { 2028 /* ALL DONE */ 2029 fd->skip = 0; 2030 fdc->bio = NULL; 2031 device_unbusy(fd->dev); 2032 devstat_end_transaction_buf(&fd->device_stats, bp); 2033 biodone(bio); 2034 fdc->fd = (fd_p) 0; 2035 fdc->fdu = -1; 2036 fdc->state = FINDWORK; 2037 } 2038 return (1); 2039 case RESETCTLR: 2040 fdc_reset(fdc); 2041 fdc->retry++; 2042 fdc->state = RESETCOMPLETE; 2043 return (0); 2044 case RESETCOMPLETE: 2045 /* 2046 * Discard all the results from the reset so that they 2047 * can't cause an unexpected interrupt later. 2048 */ 2049 for (i = 0; i < 4; i++) 2050 (void)fd_sense_int(fdc, &st0, &cyl); 2051 fdc->state = STARTRECAL; 2052 /* Fall through. */ 2053 case STARTRECAL: 2054 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 2055 /* arrgl */ 2056 fdc->retry = 6; 2057 return (retrier(fdc)); 2058 } 2059 fdc->state = RECALWAIT; 2060 return (0); /* will return later */ 2061 case RECALWAIT: 2062 /* allow heads to settle */ 2063 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc); 2064 fdc->state = RECALCOMPLETE; 2065 return (0); /* will return later */ 2066 case RECALCOMPLETE: 2067 do { 2068 /* 2069 * See SEEKCOMPLETE for a comment on this: 2070 */ 2071 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2072 return 0; 2073 if(fdc->fdct == FDC_NE765 2074 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2075 return 0; /* hope for a real intr */ 2076 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2077 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2078 { 2079 if(fdc->retry > 3) 2080 /* 2081 * a recalibrate from beyond cylinder 77 2082 * will "fail" due to the FDC limitations; 2083 * since people used to complain much about 2084 * the failure message, try not logging 2085 * this one if it seems to be the first 2086 * time in a line 2087 */ 2088 kprintf("fd%d: recal failed ST0 %b cyl %d\n", 2089 fdu, st0, NE7_ST0BITS, cyl); 2090 if(fdc->retry < 3) fdc->retry = 3; 2091 return (retrier(fdc)); 2092 } 2093 fd->track = 0; 2094 /* Seek (probably) necessary */ 2095 fdc->state = DOSEEK; 2096 return (1); /* will return immediatly */ 2097 case MOTORWAIT: 2098 if(fd->flags & FD_MOTOR_WAIT) 2099 { 2100 return (0); /* time's not up yet */ 2101 } 2102 if (fdc->flags & FDC_NEEDS_RESET) { 2103 fdc->state = RESETCTLR; 2104 fdc->flags &= ~FDC_NEEDS_RESET; 2105 } else { 2106 /* 2107 * If all motors were off, then the controller was 2108 * reset, so it has lost track of the current 2109 * cylinder. Recalibrate to handle this case. 2110 * But first, discard the results of the reset. 2111 */ 2112 fdc->state = RESETCOMPLETE; 2113 } 2114 return (1); /* will return immediatly */ 2115 default: 2116 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2117 if (fd_read_status(fdc, fd->fdsu) == 0) 2118 kprintf("FDC status :%x %x %x %x %x %x %x ", 2119 fdc->status[0], 2120 fdc->status[1], 2121 fdc->status[2], 2122 fdc->status[3], 2123 fdc->status[4], 2124 fdc->status[5], 2125 fdc->status[6] ); 2126 else 2127 kprintf("No status available "); 2128 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2129 { 2130 kprintf("[controller is dead now]\n"); 2131 return (0); 2132 } 2133 kprintf("ST0 = %x, PCN = %x\n", st0, cyl); 2134 return (0); 2135 } 2136 /*XXX confusing: some branches return immediately, others end up here*/ 2137 return (1); /* Come back immediatly to new state */ 2138 } 2139 2140 static int 2141 retrier(struct fdc_data *fdc) 2142 { 2143 struct bio *bio; 2144 struct buf *bp; 2145 struct fd_data *fd; 2146 cdev_t dev; 2147 int fdu; 2148 2149 bio = fdc->bio; 2150 bp = bio->bio_buf; 2151 dev = bio->bio_driver_info; 2152 2153 /* XXX shouldn't this be cached somewhere? */ 2154 fdu = dkunit(dev); 2155 fd = devclass_get_softc(fd_devclass, fdu); 2156 if (fd->options & FDOPT_NORETRY) 2157 goto fail; 2158 2159 switch (fdc->retry) { 2160 case 0: case 1: case 2: 2161 fdc->state = SEEKCOMPLETE; 2162 break; 2163 case 3: case 4: case 5: 2164 fdc->state = STARTRECAL; 2165 break; 2166 case 6: 2167 fdc->state = RESETCTLR; 2168 break; 2169 case 7: 2170 break; 2171 default: 2172 fail: 2173 { 2174 int printerror = (fd->options & FDOPT_NOERRLOG) == 0; 2175 2176 if (printerror) { 2177 /* 2178 * note: use the correct device for more 2179 * verbose error reporting. 2180 */ 2181 diskerr(bio, dev, 2182 "hard error", LOG_PRINTF, 2183 fdc->fd->skip); 2184 } 2185 if (printerror) { 2186 if (fdc->flags & FDC_STAT_VALID) 2187 kprintf( 2188 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2189 fdc->status[0], NE7_ST0BITS, 2190 fdc->status[1], NE7_ST1BITS, 2191 fdc->status[2], NE7_ST2BITS, 2192 fdc->status[3], fdc->status[4], 2193 fdc->status[5]); 2194 else 2195 kprintf(" (No status)\n"); 2196 } 2197 } 2198 bp->b_flags |= B_ERROR; 2199 bp->b_error = EIO; 2200 bp->b_resid += bp->b_bcount - fdc->fd->skip; 2201 fdc->bio = NULL; 2202 fdc->fd->skip = 0; 2203 device_unbusy(fd->dev); 2204 devstat_end_transaction_buf(&fdc->fd->device_stats, bp); 2205 biodone(bio); 2206 fdc->state = FINDWORK; 2207 fdc->flags |= FDC_NEEDS_RESET; 2208 fdc->fd = (fd_p) 0; 2209 fdc->fdu = -1; 2210 return (1); 2211 } 2212 fdc->retry++; 2213 return (1); 2214 } 2215 2216 static void 2217 fdformat_wakeup(struct bio *bio) 2218 { 2219 bio->bio_buf->b_cmd = BUF_CMD_DONE; 2220 wakeup(bio); 2221 } 2222 2223 static int 2224 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred) 2225 { 2226 fdu_t fdu; 2227 fd_p fd; 2228 struct buf *bp; 2229 int rv = 0; 2230 size_t fdblk; 2231 2232 fdu = dkunit(dev); 2233 fd = devclass_get_softc(fd_devclass, fdu); 2234 fdblk = 128 << fd->ft.secsize; 2235 2236 /* set up a buffer header for fdstrategy() */ 2237 bp = getpbuf(NULL); 2238 bp->b_cmd = BUF_CMD_FORMAT; 2239 2240 /* 2241 * calculate a fake blkno, so fdstrategy() would initiate a 2242 * seek to the requested cylinder 2243 */ 2244 bp->b_bio1.bio_offset = (off_t)(finfo->cyl * 2245 (fd->ft.sectrac * fd->ft.heads) 2246 + finfo->head * fd->ft.sectrac) * fdblk; 2247 bp->b_bio1.bio_driver_info = dev; 2248 bp->b_bio1.bio_done = fdformat_wakeup; 2249 2250 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; 2251 bp->b_data = (caddr_t)finfo; 2252 2253 /* now do the format */ 2254 dev_dstrategy(dev, &bp->b_bio1); 2255 2256 /* ...and wait for it to complete */ 2257 crit_enter(); 2258 while (bp->b_cmd != BUF_CMD_DONE) { 2259 rv = tsleep(&bp->b_bio1, 0, "fdform", 20 * hz); 2260 if (rv == EWOULDBLOCK) 2261 break; 2262 } 2263 crit_exit(); 2264 2265 if (rv == EWOULDBLOCK) { 2266 /* timed out */ 2267 rv = EIO; 2268 device_unbusy(fd->dev); 2269 biodone(&bp->b_bio1); 2270 } 2271 if (bp->b_flags & B_ERROR) 2272 rv = bp->b_error; 2273 /* 2274 * allow the process to be swapped 2275 */ 2276 relpbuf(bp, NULL); 2277 return rv; 2278 } 2279 2280 /* 2281 * TODO: don't allocate buffer on stack. 2282 */ 2283 2284 static int 2285 fdioctl(struct dev_ioctl_args *ap) 2286 { 2287 cdev_t dev = ap->a_head.a_dev; 2288 fdu_t fdu = dkunit(dev); 2289 fd_p fd = devclass_get_softc(fd_devclass, fdu); 2290 size_t fdblk; 2291 struct fdc_status *fsp; 2292 int error = 0; 2293 2294 fdblk = 128 << fd->ft.secsize; 2295 2296 switch (ap->a_cmd) { 2297 case FD_FORM: 2298 if ((ap->a_fflag & FWRITE) == 0) 2299 error = EBADF; /* must be opened for writing */ 2300 else if (((struct fd_formb *)ap->a_data)->format_version != 2301 FD_FORMAT_VERSION) 2302 error = EINVAL; /* wrong version of formatting prog */ 2303 else 2304 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred); 2305 break; 2306 2307 case FD_GTYPE: /* get drive type */ 2308 *(struct fd_type *)ap->a_data = fd->ft; 2309 break; 2310 2311 case FD_STYPE: /* set drive type */ 2312 /* this is considered harmful; only allow for superuser */ 2313 if (suser_cred(ap->a_cred, 0) != 0) 2314 return EPERM; 2315 fd->ft = *(struct fd_type *)ap->a_data; 2316 break; 2317 2318 case FD_GOPTS: /* get drive options */ 2319 *(int *)ap->a_data = fd->options; 2320 break; 2321 2322 case FD_SOPTS: /* set drive options */ 2323 fd->options = *(int *)ap->a_data; 2324 break; 2325 2326 case FD_GSTAT: 2327 fsp = (struct fdc_status *)ap->a_data; 2328 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2329 return EINVAL; 2330 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2331 break; 2332 2333 default: 2334 error = ENOTTY; 2335 break; 2336 } 2337 return (error); 2338 } 2339 2340 /* 2341 * Hello emacs, these are the 2342 * Local Variables: 2343 * c-indent-level: 8 2344 * c-continued-statement-offset: 8 2345 * c-continued-brace-offset: 0 2346 * c-brace-offset: -8 2347 * c-brace-imaginary-offset: 0 2348 * c-argdecl-indent: 8 2349 * c-label-offset: -8 2350 * c++-hanging-braces: 1 2351 * c++-access-specifier-offset: -8 2352 * c++-empty-arglist-indent: 8 2353 * c++-friend-offset: 0 2354 * End: 2355 */ 2356