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 1.40 2007/06/17 23:50:15 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/disk.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; /* 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 disk disk; 200 struct devstat device_stats; 201 device_t dev; 202 fdu_t fdu; 203 }; 204 205 struct fdc_ivars { 206 int fdunit; 207 }; 208 static devclass_t fd_devclass; 209 210 /***********************************************************************\ 211 * Throughout this file the following conventions will be used: * 212 * fd is a pointer to the fd_data struct for the drive in question * 213 * fdc is a pointer to the fdc_data struct for the controller * 214 * fdu is the floppy drive unit number * 215 * fdcu is the floppy controller unit number * 216 * fdsu is the floppy drive unit number on that controller. (sub-unit) * 217 \***********************************************************************/ 218 219 /* internal functions */ 220 static void fdc_intr(void *); 221 static void set_motor(struct fdc_data *, int, int); 222 # define TURNON 1 223 # define TURNOFF 0 224 static timeout_t fd_turnoff; 225 static timeout_t fd_motor_on; 226 static void fd_turnon(struct fd_data *); 227 static void fdc_reset(fdc_p); 228 static int fd_in(struct fdc_data *, int *); 229 static int out_fdc(struct fdc_data *, int); 230 static void fdstart(struct fdc_data *); 231 static timeout_t fd_iotimeout; 232 static timeout_t fd_pseudointr; 233 static int fdstate(struct fdc_data *); 234 static int retrier(struct fdc_data *); 235 static int fdformat(cdev_t, struct fd_formb *, struct ucred *); 236 237 static int enable_fifo(fdc_p fdc); 238 239 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 240 241 242 #define DEVIDLE 0 243 #define FINDWORK 1 244 #define DOSEEK 2 245 #define SEEKCOMPLETE 3 246 #define IOCOMPLETE 4 247 #define RECALCOMPLETE 5 248 #define STARTRECAL 6 249 #define RESETCTLR 7 250 #define SEEKWAIT 8 251 #define RECALWAIT 9 252 #define MOTORWAIT 10 253 #define IOTIMEDOUT 11 254 #define RESETCOMPLETE 12 255 #define PIOREAD 13 256 257 #ifdef FDC_DEBUG 258 static char const * const fdstates[] = 259 { 260 "DEVIDLE", 261 "FINDWORK", 262 "DOSEEK", 263 "SEEKCOMPLETE", 264 "IOCOMPLETE", 265 "RECALCOMPLETE", 266 "STARTRECAL", 267 "RESETCTLR", 268 "SEEKWAIT", 269 "RECALWAIT", 270 "MOTORWAIT", 271 "IOTIMEDOUT", 272 "RESETCOMPLETE", 273 "PIOREAD", 274 }; 275 276 /* CAUTION: fd_debug causes huge amounts of logging output */ 277 static int volatile fd_debug = 0; 278 #define TRACE0(arg) if(fd_debug) kprintf(arg) 279 #define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2) 280 #else /* FDC_DEBUG */ 281 #define TRACE0(arg) 282 #define TRACE1(arg1, arg2) 283 #endif /* FDC_DEBUG */ 284 285 void 286 fdout_wr(fdc_p fdc, u_int8_t v) 287 { 288 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 289 } 290 291 static u_int8_t 292 fdsts_rd(fdc_p fdc) 293 { 294 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 295 } 296 297 static void 298 fddata_wr(fdc_p fdc, u_int8_t v) 299 { 300 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 301 } 302 303 static u_int8_t 304 fddata_rd(fdc_p fdc) 305 { 306 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 307 } 308 309 static void 310 fdctl_wr_isa(fdc_p fdc, u_int8_t v) 311 { 312 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 313 } 314 315 #if 0 316 317 static u_int8_t 318 fdin_rd(fdc_p fdc) 319 { 320 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 321 } 322 323 #endif 324 325 static d_open_t Fdopen; /* NOTE, not fdopen */ 326 static d_close_t fdclose; 327 static d_ioctl_t fdioctl; 328 static d_strategy_t fdstrategy; 329 330 static struct dev_ops fd_ops = { 331 { "fd", FD_CDEV_MAJOR, D_DISK }, 332 .d_open = Fdopen, 333 .d_close = fdclose, 334 .d_read = physread, 335 .d_write = physwrite, 336 .d_ioctl = fdioctl, 337 .d_strategy = fdstrategy, 338 }; 339 340 static int 341 fdc_err(struct fdc_data *fdc, const char *s) 342 { 343 fdc->fdc_errs++; 344 if (s) { 345 if (fdc->fdc_errs < FDC_ERRMAX) 346 device_printf(fdc->fdc_dev, "%s", s); 347 else if (fdc->fdc_errs == FDC_ERRMAX) 348 device_printf(fdc->fdc_dev, "too many errors, not " 349 "logging any more\n"); 350 } 351 352 return FD_FAILED; 353 } 354 355 /* 356 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 357 * Unit number, 358 * # of output bytes, output bytes as ints ..., 359 * # of input bytes, input bytes as ints ... 360 */ 361 int 362 fd_cmd(struct fdc_data *fdc, int n_out, ...) 363 { 364 u_char cmd; 365 int n_in; 366 int n; 367 __va_list ap; 368 369 __va_start(ap, n_out); 370 cmd = (u_char)(__va_arg(ap, int)); 371 __va_end(ap); 372 __va_start(ap, n_out); 373 for (n = 0; n < n_out; n++) 374 { 375 if (out_fdc(fdc, __va_arg(ap, int)) < 0) 376 { 377 char msg[50]; 378 ksnprintf(msg, sizeof(msg), 379 "cmd %x failed at out byte %d of %d\n", 380 cmd, n + 1, n_out); 381 return fdc_err(fdc, msg); 382 } 383 } 384 n_in = __va_arg(ap, int); 385 for (n = 0; n < n_in; n++) 386 { 387 int *ptr = __va_arg(ap, int *); 388 if (fd_in(fdc, ptr) < 0) 389 { 390 char msg[50]; 391 ksnprintf(msg, sizeof(msg), 392 "cmd %02x failed at in byte %d of %d\n", 393 cmd, n + 1, n_in); 394 return fdc_err(fdc, msg); 395 } 396 } 397 398 return 0; 399 } 400 401 static int 402 enable_fifo(fdc_p fdc) 403 { 404 int i, j; 405 406 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 407 408 /* 409 * XXX: 410 * Cannot use fd_cmd the normal way here, since 411 * this might be an invalid command. Thus we send the 412 * first byte, and check for an early turn of data directon. 413 */ 414 415 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 416 return fdc_err(fdc, "Enable FIFO failed\n"); 417 418 /* If command is invalid, return */ 419 j = FDSTS_TIMEOUT; 420 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 421 != NE7_RQM && j-- > 0) { 422 if (i == (NE7_DIO | NE7_RQM)) { 423 fdc_reset(fdc); 424 return FD_FAILED; 425 } 426 DELAY(1); 427 } 428 if (j<0 || 429 fd_cmd(fdc, 3, 430 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 431 fdc_reset(fdc); 432 return fdc_err(fdc, "Enable FIFO failed\n"); 433 } 434 fdc->flags |= FDC_HAS_FIFO; 435 return 0; 436 } 437 if (fd_cmd(fdc, 4, 438 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 439 return fdc_err(fdc, "Re-enable FIFO failed\n"); 440 return 0; 441 } 442 443 static int 444 fd_sense_drive_status(fdc_p fdc, int *st3p) 445 { 446 int st3; 447 448 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 449 { 450 return fdc_err(fdc, "Sense Drive Status failed\n"); 451 } 452 if (st3p) 453 *st3p = st3; 454 455 return 0; 456 } 457 458 static int 459 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 460 { 461 int cyl, st0, ret; 462 463 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 464 if (ret) { 465 (void)fdc_err(fdc, 466 "sense intr err reading stat reg 0\n"); 467 return ret; 468 } 469 470 if (st0p) 471 *st0p = st0; 472 473 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 474 /* 475 * There doesn't seem to have been an interrupt. 476 */ 477 return FD_NOT_VALID; 478 } 479 480 if (fd_in(fdc, &cyl) < 0) { 481 return fdc_err(fdc, "can't get cyl num\n"); 482 } 483 484 if (cylp) 485 *cylp = cyl; 486 487 return 0; 488 } 489 490 491 static int 492 fd_read_status(fdc_p fdc, int fdsu) 493 { 494 int i, ret; 495 496 for (i = 0; i < 7; i++) { 497 /* 498 * XXX types are poorly chosen. Only bytes can by read 499 * from the hardware, but fdc->status[] wants u_ints and 500 * fd_in() gives ints. 501 */ 502 int status; 503 504 ret = fd_in(fdc, &status); 505 fdc->status[i] = status; 506 if (ret != 0) 507 break; 508 } 509 510 if (ret == 0) 511 fdc->flags |= FDC_STAT_VALID; 512 else 513 fdc->flags &= ~FDC_STAT_VALID; 514 515 return ret; 516 } 517 518 /****************************************************************************/ 519 /* autoconfiguration stuff */ 520 /****************************************************************************/ 521 522 int 523 fdc_alloc_resources(struct fdc_data *fdc) 524 { 525 device_t dev; 526 int ispnp, ispcmcia; 527 528 dev = fdc->fdc_dev; 529 ispnp = (fdc->flags & FDC_ISPNP) != 0; 530 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 531 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 532 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 533 534 /* 535 * On standard ISA, we don't just use an 8 port range 536 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 537 * register at 0x3f6. 538 * 539 * Isn't PC hardware wonderful. 540 * 541 * The Y-E Data PCMCIA FDC doesn't have this problem, it 542 * uses the register with offset 6 for pseudo-DMA, and the 543 * one with offset 7 as control register. 544 */ 545 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 546 &fdc->rid_ioport, 0ul, ~0ul, 547 ispcmcia ? 8 : (ispnp ? 1 : 6), 548 RF_ACTIVE); 549 if (fdc->res_ioport == 0) { 550 device_printf(dev, "cannot reserve I/O port range\n"); 551 return ENXIO; 552 } 553 fdc->portt = rman_get_bustag(fdc->res_ioport); 554 fdc->porth = rman_get_bushandle(fdc->res_ioport); 555 556 if (!ispcmcia) { 557 /* 558 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 559 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 560 * by checking the size and adjust the port address 561 * accordingly. 562 */ 563 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 564 fdc->port_off = -2; 565 566 /* 567 * Register the control port range as rid 1 if it 568 * isn't there already. Most PnP BIOSen will have 569 * already done this but non-PnP configurations don't. 570 * 571 * And some (!!) report 0x3f2-0x3f5 and completely 572 * leave out the control register! It seems that some 573 * non-antique controller chips have a different 574 * method of programming the transfer speed which 575 * doesn't require the control register, but it's 576 * mighty bogus as the chip still responds to the 577 * address for the control register. 578 */ 579 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 580 u_long ctlstart; 581 582 /* Find the control port, usually 0x3f7 */ 583 ctlstart = rman_get_start(fdc->res_ioport) + 584 fdc->port_off + 7; 585 586 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); 587 } 588 589 /* 590 * Now (finally!) allocate the control port. 591 */ 592 fdc->rid_ctl = 1; 593 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 594 &fdc->rid_ctl, 595 0ul, ~0ul, 1, RF_ACTIVE); 596 if (fdc->res_ctl == 0) { 597 device_printf(dev, 598 "cannot reserve control I/O port range\n"); 599 return ENXIO; 600 } 601 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 602 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 603 } 604 605 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 606 &fdc->rid_irq, 0ul, ~0ul, 1, 607 RF_ACTIVE); 608 if (fdc->res_irq == 0) { 609 device_printf(dev, "cannot reserve interrupt line\n"); 610 return ENXIO; 611 } 612 613 if ((fdc->flags & FDC_NODMA) == 0) { 614 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 615 &fdc->rid_drq, 0ul, ~0ul, 1, 616 RF_ACTIVE); 617 if (fdc->res_drq == 0) { 618 device_printf(dev, "cannot reserve DMA request line\n"); 619 return ENXIO; 620 } 621 fdc->dmachan = fdc->res_drq->r_start; 622 } 623 624 return 0; 625 } 626 627 void 628 fdc_release_resources(struct fdc_data *fdc) 629 { 630 device_t dev; 631 632 dev = fdc->fdc_dev; 633 if (fdc->res_irq != 0) { 634 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 635 fdc->res_irq); 636 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 637 fdc->res_irq); 638 } 639 if (fdc->res_ctl != 0) { 640 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 641 fdc->res_ctl); 642 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 643 fdc->res_ctl); 644 } 645 if (fdc->res_ioport != 0) { 646 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 647 fdc->res_ioport); 648 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 649 fdc->res_ioport); 650 } 651 if (fdc->res_drq != 0) { 652 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 653 fdc->res_drq); 654 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 655 fdc->res_drq); 656 } 657 } 658 659 /****************************************************************************/ 660 /* autoconfiguration stuff */ 661 /****************************************************************************/ 662 663 static struct isa_pnp_id fdc_ids[] = { 664 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 665 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 666 {0} 667 }; 668 669 int 670 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result) 671 { 672 struct fdc_ivars *ivars = device_get_ivars(child); 673 674 switch (which) { 675 case FDC_IVAR_FDUNIT: 676 *result = ivars->fdunit; 677 break; 678 default: 679 return ENOENT; 680 } 681 return 0; 682 } 683 684 /* 685 * fdc controller section. 686 */ 687 static int 688 fdc_probe(device_t dev) 689 { 690 int error, ic_type; 691 struct fdc_data *fdc; 692 693 fdc = device_get_softc(dev); 694 bzero(fdc, sizeof *fdc); 695 fdc->fdc_dev = dev; 696 fdc->fdctl_wr = fdctl_wr_isa; 697 698 /* Check pnp ids */ 699 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 700 if (error == ENXIO) 701 return ENXIO; 702 if (error == 0) 703 fdc->flags |= FDC_ISPNP; 704 705 /* Attempt to allocate our resources for the duration of the probe */ 706 error = fdc_alloc_resources(fdc); 707 if (error) 708 goto out; 709 710 /* First - lets reset the floppy controller */ 711 fdout_wr(fdc, 0); 712 DELAY(100); 713 fdout_wr(fdc, FDO_FRST); 714 715 /* see if it can handle a command */ 716 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 717 NE7_SPEC_2(2, 0), 0)) { 718 error = ENXIO; 719 goto out; 720 } 721 722 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 723 ic_type = (u_char)ic_type; 724 switch (ic_type) { 725 case 0x80: 726 device_set_desc(dev, "NEC 765 or clone"); 727 fdc->fdct = FDC_NE765; 728 break; 729 case 0x81: 730 device_set_desc(dev, "Intel 82077 or clone"); 731 fdc->fdct = FDC_I82077; 732 break; 733 case 0x90: 734 device_set_desc(dev, "NEC 72065B or clone"); 735 fdc->fdct = FDC_NE72065; 736 break; 737 default: 738 device_set_desc(dev, "generic floppy controller"); 739 fdc->fdct = FDC_UNKNOWN; 740 break; 741 } 742 } 743 744 out: 745 fdc_release_resources(fdc); 746 return (error); 747 } 748 749 /* 750 * Add a child device to the fdc controller. It will then be probed etc. 751 */ 752 static void 753 fdc_add_child(device_t dev, const char *name, int unit) 754 { 755 int disabled; 756 struct fdc_ivars *ivar; 757 device_t child; 758 759 ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO); 760 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 761 ivar->fdunit = 0; 762 child = device_add_child(dev, name, unit); 763 if (child == NULL) 764 return; 765 device_set_ivars(child, ivar); 766 if (resource_int_value(name, unit, "disabled", &disabled) == 0 767 && disabled != 0) 768 device_disable(child); 769 } 770 771 int 772 fdc_attach(device_t dev) 773 { 774 struct fdc_data *fdc; 775 int i, error; 776 777 fdc = device_get_softc(dev); 778 779 callout_init(&fdc->pseudointr_ch); 780 781 error = fdc_alloc_resources(fdc); 782 if (error) { 783 device_printf(dev, "cannot re-aquire resources\n"); 784 return error; 785 } 786 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 787 0, fdc_intr, fdc, 788 &fdc->fdc_intr, NULL); 789 if (error) { 790 device_printf(dev, "cannot setup interrupt\n"); 791 return error; 792 } 793 fdc->fdcu = device_get_unit(dev); 794 fdc->flags |= FDC_ATTACHED; 795 796 if ((fdc->flags & FDC_NODMA) == 0) { 797 /* Acquire the DMA channel forever, The driver will do the rest */ 798 /* XXX should integrate with rman */ 799 isa_dma_acquire(fdc->dmachan); 800 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */); 801 } 802 fdc->state = DEVIDLE; 803 804 /* reset controller, turn motor off, clear fdout mirror reg */ 805 fdout_wr(fdc, ((fdc->fdout = 0))); 806 bioq_init(&fdc->bio_queue); 807 808 /* 809 * Probe and attach any children. We should probably detect 810 * devices from the BIOS unless overridden. 811 */ 812 for (i = resource_query_string(-1, "at", device_get_nameunit(dev)); 813 i != -1; 814 i = resource_query_string(i, "at", device_get_nameunit(dev))) 815 fdc_add_child(dev, resource_query_name(i), 816 resource_query_unit(i)); 817 818 return (bus_generic_attach(dev)); 819 } 820 821 int 822 fdc_print_child(device_t me, device_t child) 823 { 824 int retval = 0; 825 826 retval += bus_print_child_header(me, child); 827 retval += kprintf(" on %s drive %d\n", device_get_nameunit(me), 828 fdc_get_fdunit(child)); 829 830 return (retval); 831 } 832 833 static device_method_t fdc_methods[] = { 834 /* Device interface */ 835 DEVMETHOD(device_probe, fdc_probe), 836 DEVMETHOD(device_attach, fdc_attach), 837 DEVMETHOD(device_detach, bus_generic_detach), 838 DEVMETHOD(device_shutdown, bus_generic_shutdown), 839 DEVMETHOD(device_suspend, bus_generic_suspend), 840 DEVMETHOD(device_resume, bus_generic_resume), 841 842 /* Bus interface */ 843 DEVMETHOD(bus_print_child, fdc_print_child), 844 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 845 /* Our children never use any other bus interface methods. */ 846 847 { 0, 0 } 848 }; 849 850 static driver_t fdc_driver = { 851 "fdc", 852 fdc_methods, 853 sizeof(struct fdc_data) 854 }; 855 856 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 857 858 /******************************************************************/ 859 /* 860 * devices attached to the controller section. 861 */ 862 static int 863 fd_probe(device_t dev) 864 { 865 int i; 866 u_int fdt, st0, st3; 867 struct fd_data *fd; 868 struct fdc_data *fdc; 869 fdsu_t fdsu; 870 static int fd_fifo = 0; 871 872 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 873 fd = device_get_softc(dev); 874 fdc = device_get_softc(device_get_parent(dev)); 875 876 bzero(fd, sizeof *fd); 877 fd->dev = dev; 878 fd->fdc = fdc; 879 fd->fdsu = fdsu; 880 fd->fdu = device_get_unit(dev); 881 882 #ifdef __i386__ 883 /* look up what bios thinks we have */ 884 switch (fd->fdu) { 885 case 0: 886 if ((fdc->flags & FDC_ISPCMCIA)) 887 fdt = RTCFDT_144M; 888 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0) 889 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED; 890 else 891 fdt = (rtcin(RTC_FDISKETTE) & 0xf0); 892 break; 893 case 1: 894 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0); 895 break; 896 default: 897 fdt = RTCFDT_NONE; 898 break; 899 } 900 #else 901 fdt = RTCFDT_144M; /* XXX probably */ 902 #endif 903 904 /* is there a unit? */ 905 if (fdt == RTCFDT_NONE) 906 return (ENXIO); 907 908 /* select it */ 909 set_motor(fdc, fdsu, TURNON); 910 DELAY(1000000); /* 1 sec */ 911 912 /* XXX This doesn't work before the first set_motor() */ 913 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN 914 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 915 && enable_fifo(fdc) == 0) { 916 device_printf(device_get_parent(dev), 917 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 918 } 919 fd_fifo = 1; 920 921 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) 922 && (st3 & NE7_ST3_T0)) { 923 /* if at track 0, first seek inwards */ 924 /* seek some steps: */ 925 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0); 926 DELAY(300000); /* ...wait a moment... */ 927 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */ 928 } 929 930 /* If we're at track 0 first seek inwards. */ 931 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) { 932 /* Seek some steps... */ 933 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 934 /* ...wait a moment... */ 935 DELAY(300000); 936 /* make ctrlr happy: */ 937 fd_sense_int(fdc, 0, 0); 938 } 939 } 940 941 for (i = 0; i < 2; i++) { 942 /* 943 * we must recalibrate twice, just in case the 944 * heads have been beyond cylinder 76, since most 945 * FDCs still barf when attempting to recalibrate 946 * more than 77 steps 947 */ 948 /* go back to 0: */ 949 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 950 /* a second being enough for full stroke seek*/ 951 DELAY(i == 0 ? 1000000 : 300000); 952 953 /* anything responding? */ 954 if (fd_sense_int(fdc, &st0, 0) == 0 && 955 (st0 & NE7_ST0_EC) == 0) 956 break; /* already probed succesfully */ 957 } 958 } 959 960 set_motor(fdc, fdsu, TURNOFF); 961 962 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */ 963 return (ENXIO); 964 965 fd->track = FD_NO_TRACK; 966 fd->fdc = fdc; 967 fd->fdsu = fdsu; 968 fd->options = 0; 969 callout_init(&fd->toffhandle); 970 callout_init(&fd->tohandle); 971 callout_init(&fd->motor); 972 973 switch (fdt) { 974 case RTCFDT_12M: 975 device_set_desc(dev, "1200-KB 5.25\" drive"); 976 fd->type = FD_1200; 977 break; 978 case RTCFDT_144M | RTCFDT_144M_PRETENDED: 979 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive"); 980 fdt = RTCFDT_144M; 981 fd->type = FD_1440; 982 case RTCFDT_144M: 983 device_set_desc(dev, "1440-KB 3.5\" drive"); 984 fd->type = FD_1440; 985 break; 986 case RTCFDT_288M: 987 case RTCFDT_288M_1: 988 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 989 fd->type = FD_1440; 990 break; 991 case RTCFDT_360K: 992 device_set_desc(dev, "360-KB 5.25\" drive"); 993 fd->type = FD_360; 994 break; 995 case RTCFDT_720K: 996 kprintf("720-KB 3.5\" drive"); 997 fd->type = FD_720; 998 break; 999 default: 1000 return (ENXIO); 1001 } 1002 fd->ft = fd_types[fd->type - 1]; 1003 return (0); 1004 } 1005 1006 static int 1007 fd_attach(device_t dev) 1008 { 1009 struct fd_data *fd; 1010 1011 fd = device_get_softc(dev); 1012 1013 disk_create(fd->fdu, &fd->disk, &fd_ops); 1014 1015 /* 1016 * Make special raw floppy devices with preset types to 1017 * make formatting easier. These override the disk management 1018 * layer for the whole-slice-disk for partitions 128-191. Note 1019 * that we do not override partition 255, which is the 1020 * whole-slice-part. If we did we would have to provide our 1021 * own DIOCGPART ioctl. 1022 */ 1023 dev_ops_add(&fd_ops, 1024 dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64), 1025 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128)); 1026 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 1), 1027 UID_ROOT, GID_WHEEL, 0600, "fd%d.1720", fd->fdu); 1028 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 2), 1029 UID_ROOT, GID_WHEEL, 0600, "fd%d.1480", fd->fdu); 1030 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 3), 1031 UID_ROOT, GID_WHEEL, 0600, "fd%d.1440", fd->fdu); 1032 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 4), 1033 UID_ROOT, GID_WHEEL, 0600, "fd%d.1200", fd->fdu); 1034 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 5), 1035 UID_ROOT, GID_WHEEL, 0600, "fd%d.820", fd->fdu); 1036 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 6), 1037 UID_ROOT, GID_WHEEL, 0600, "fd%d.800", fd->fdu); 1038 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 7), 1039 UID_ROOT, GID_WHEEL, 0600, "fd%d.720", fd->fdu); 1040 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 8), 1041 UID_ROOT, GID_WHEEL, 0600, "fd%d.360", fd->fdu); 1042 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 9), 1043 UID_ROOT, GID_WHEEL, 0600, "fd%d.640", fd->fdu); 1044 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 10), 1045 UID_ROOT, GID_WHEEL, 0600, "fd%d.1232", fd->fdu); 1046 1047 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1048 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS, 1049 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1050 DEVSTAT_PRIORITY_FD); 1051 return (0); 1052 } 1053 1054 static int 1055 fd_detach(device_t dev) 1056 { 1057 struct fd_data *fd; 1058 1059 fd = device_get_softc(dev); 1060 dev_ops_remove(&fd_ops, 1061 dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64), 1062 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128)); 1063 disk_invalidate(&fd->disk); 1064 disk_destroy(&fd->disk); 1065 devstat_remove_entry(&fd->device_stats); 1066 callout_stop(&fd->toffhandle); 1067 callout_stop(&fd->motor); 1068 1069 return (0); 1070 } 1071 1072 static device_method_t fd_methods[] = { 1073 /* Device interface */ 1074 DEVMETHOD(device_probe, fd_probe), 1075 DEVMETHOD(device_attach, fd_attach), 1076 DEVMETHOD(device_detach, fd_detach), 1077 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1078 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1079 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1080 1081 { 0, 0 } 1082 }; 1083 1084 static driver_t fd_driver = { 1085 "fd", 1086 fd_methods, 1087 sizeof(struct fd_data) 1088 }; 1089 1090 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1091 1092 /****************************************************************************/ 1093 /* motor control stuff */ 1094 /* remember to not deselect the drive we're working on */ 1095 /****************************************************************************/ 1096 static void 1097 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1098 { 1099 int fdout = fdc->fdout; 1100 int needspecify = 0; 1101 1102 if(turnon) { 1103 fdout &= ~FDO_FDSEL; 1104 fdout |= (FDO_MOEN0 << fdsu) + fdsu; 1105 } else 1106 fdout &= ~(FDO_MOEN0 << fdsu); 1107 1108 if(!turnon 1109 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0) 1110 /* gonna turn off the last drive, put FDC to bed */ 1111 fdout &= ~ (FDO_FRST|FDO_FDMAEN); 1112 else { 1113 /* make sure controller is selected and specified */ 1114 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0) 1115 needspecify = 1; 1116 fdout |= (FDO_FRST|FDO_FDMAEN); 1117 } 1118 1119 fdout_wr(fdc, fdout); 1120 fdc->fdout = fdout; 1121 TRACE1("[0x%x->FDOUT]", fdout); 1122 1123 if (needspecify) { 1124 /* 1125 * XXX 1126 * special case: since we have just woken up the FDC 1127 * from its sleep, we silently assume the command will 1128 * be accepted, and do not test for a timeout 1129 */ 1130 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1131 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1132 0); 1133 if (fdc->flags & FDC_HAS_FIFO) 1134 (void) enable_fifo(fdc); 1135 } 1136 } 1137 1138 static void 1139 fd_turnoff(void *xfd) 1140 { 1141 fd_p fd = xfd; 1142 1143 TRACE1("[fd%d: turnoff]", fd->fdu); 1144 1145 crit_enter(); 1146 /* 1147 * Don't turn off the motor yet if the drive is active. 1148 * 1149 * If we got here, this could only mean we missed an interrupt. 1150 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1151 * after a controller reset. Just schedule a pseudo-interrupt 1152 * so the state machine gets re-entered. 1153 */ 1154 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1155 fdc_intr(fd->fdc); 1156 crit_exit(); 1157 return; 1158 } 1159 1160 fd->flags &= ~FD_MOTOR; 1161 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1162 crit_exit(); 1163 } 1164 1165 static void 1166 fd_motor_on(void *xfd) 1167 { 1168 fd_p fd = xfd; 1169 1170 crit_enter(); 1171 fd->flags &= ~FD_MOTOR_WAIT; 1172 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1173 { 1174 fdc_intr(fd->fdc); 1175 } 1176 crit_exit(); 1177 } 1178 1179 static void 1180 fd_turnon(fd_p fd) 1181 { 1182 if(!(fd->flags & FD_MOTOR)) 1183 { 1184 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1185 set_motor(fd->fdc, fd->fdsu, TURNON); 1186 callout_reset(&fd->motor, hz, fd_motor_on, fd); 1187 } 1188 } 1189 1190 static void 1191 fdc_reset(fdc_p fdc) 1192 { 1193 /* Try a reset, keep motor on */ 1194 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1195 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1196 DELAY(100); 1197 /* enable FDC, but defer interrupts a moment */ 1198 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1199 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1200 DELAY(100); 1201 fdout_wr(fdc, fdc->fdout); 1202 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1203 1204 /* XXX after a reset, silently believe the FDC will accept commands */ 1205 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1206 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1207 0); 1208 if (fdc->flags & FDC_HAS_FIFO) 1209 (void) enable_fifo(fdc); 1210 } 1211 1212 /****************************************************************************/ 1213 /* fdc in/out */ 1214 /****************************************************************************/ 1215 /* 1216 * FDC IO functions, take care of the main status register, timeout 1217 * in case the desired status bits are never set. 1218 * 1219 * These PIO loops initially start out with short delays between 1220 * each iteration in the expectation that the required condition 1221 * is usually met quickly, so it can be handled immediately. After 1222 * about 1 ms, stepping is increased to achieve a better timing 1223 * accuracy in the calls to DELAY(). 1224 */ 1225 static int 1226 fd_in(struct fdc_data *fdc, int *ptr) 1227 { 1228 int i, j, step; 1229 1230 for (j = 0, step = 1; 1231 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) && 1232 j < FDSTS_TIMEOUT; 1233 j += step) { 1234 if (i == NE7_RQM) 1235 return (fdc_err(fdc, "ready for output in input\n")); 1236 if (j == 1000) 1237 step = 1000; 1238 DELAY(step); 1239 } 1240 if (j >= FDSTS_TIMEOUT) 1241 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); 1242 #ifdef FDC_DEBUG 1243 i = fddata_rd(fdc); 1244 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1245 *ptr = i; 1246 return (0); 1247 #else /* !FDC_DEBUG */ 1248 i = fddata_rd(fdc); 1249 if (ptr) 1250 *ptr = i; 1251 return (0); 1252 #endif /* FDC_DEBUG */ 1253 } 1254 1255 static int 1256 out_fdc(struct fdc_data *fdc, int x) 1257 { 1258 int i, j, step; 1259 1260 for (j = 0, step = 1; 1261 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM && 1262 j < FDSTS_TIMEOUT; 1263 j += step) { 1264 if (i == (NE7_DIO|NE7_RQM)) 1265 return (fdc_err(fdc, "ready for input in output\n")); 1266 if (j == 1000) 1267 step = 1000; 1268 DELAY(step); 1269 } 1270 if (j >= FDSTS_TIMEOUT) 1271 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); 1272 1273 /* Send the command and return */ 1274 fddata_wr(fdc, x); 1275 TRACE1("[0x%x->FDDATA]", x); 1276 return (0); 1277 } 1278 1279 /****************************************************************************/ 1280 /* fdopen/fdclose */ 1281 /****************************************************************************/ 1282 int 1283 Fdopen(struct dev_open_args *ap) 1284 { 1285 cdev_t dev = ap->a_head.a_dev; 1286 fdu_t fdu = dkunit(dev); 1287 struct disk_info info; 1288 struct fd_type *ft; 1289 int type; 1290 int changetype; 1291 fd_p fd; 1292 fdc_p fdc; 1293 1294 /* check bounds */ 1295 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1296 return (ENXIO); 1297 fdc = fd->fdc; 1298 if ((fdc == NULL) || (fd->type == NO_TYPE)) 1299 return (ENXIO); 1300 1301 /* 1302 * Figure out the type of floppy. There are special whole-disk-device 1303 * overrides that will override the current type. 1304 */ 1305 type = dkpart(dev); 1306 if (type == WHOLE_SLICE_PART) { 1307 type = fd->type; /* do not change selected type data */ 1308 changetype = 0; 1309 } else if (type > 128) { 1310 type -= 128; /* set to specific format */ 1311 changetype = 1; 1312 } else { 1313 type = fd->type; /* reset to default */ 1314 changetype = 1; 1315 } 1316 if (type > NUMDENS) 1317 return (ENXIO); 1318 if (type != fd->type) { 1319 /* 1320 * For each type of basic drive, make sure we are trying 1321 * to open a type it can do, 1322 */ 1323 switch (fd->type) { 1324 case FD_360: 1325 return (ENXIO); 1326 case FD_720: 1327 if ( type != FD_820 1328 && type != FD_800 1329 && type != FD_640 1330 ) 1331 return (ENXIO); 1332 break; 1333 case FD_1200: 1334 switch (type) { 1335 case FD_1480: 1336 type = FD_1480in5_25; 1337 break; 1338 case FD_1440: 1339 type = FD_1440in5_25; 1340 break; 1341 case FD_1232: 1342 break; 1343 case FD_820: 1344 type = FD_820in5_25; 1345 break; 1346 case FD_800: 1347 type = FD_800in5_25; 1348 break; 1349 case FD_720: 1350 type = FD_720in5_25; 1351 break; 1352 case FD_640: 1353 type = FD_640in5_25; 1354 break; 1355 case FD_360: 1356 type = FD_360in5_25; 1357 break; 1358 default: 1359 return(ENXIO); 1360 } 1361 break; 1362 case FD_1440: 1363 if ( type != FD_1720 1364 && type != FD_1480 1365 && type != FD_1200 1366 && type != FD_820 1367 && type != FD_800 1368 && type != FD_720 1369 && type != FD_640 1370 ) 1371 return(ENXIO); 1372 break; 1373 } 1374 } 1375 1376 /* 1377 * fd->type is the basic drive type, not the current format 1378 * we are reading. We only change the type when opening the 1379 * whole-slice-partition 1380 */ 1381 if (changetype) 1382 fd->ft = fd_types[type - 1]; 1383 fd->flags |= FD_OPEN; 1384 1385 /* 1386 * Clearing the DMA overrun counter at open time is a bit messy. 1387 * Since we're only managing one counter per controller, opening 1388 * the second drive could mess it up. Anyway, if the DMA overrun 1389 * condition is really persistent, it will eventually time out 1390 * still. OTOH, clearing it here will ensure we'll at least start 1391 * trying again after a previous (maybe even long ago) failure. 1392 * Also, this is merely a stop-gap measure only that should not 1393 * happen during normal operation, so we can tolerate it to be a 1394 * bit sloppy about this. 1395 */ 1396 fdc->dma_overruns = 0; 1397 1398 /* 1399 * Set disk parameters for the disk management layer. 1400 * 1401 * Note that we do not set RAWEXTENSIONS here. We override 1402 * the minor numbers in the raw-extension range and handle them 1403 * directly. 1404 */ 1405 bzero(&info, sizeof(info)); 1406 ft = &fd->ft; 1407 info.d_media_blksize = 128 << ft->secsize; 1408 info.d_media_blocks = ft->size; 1409 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR; 1410 info.d_nheads = ft->heads; 1411 info.d_secpertrack = ft->sectrac; 1412 info.d_secpercyl = ft->sectrac * ft->heads; 1413 info.d_ncylinders = ft->size / info.d_secpercyl; 1414 disk_setdiskinfo(&fd->disk, &info); 1415 1416 return 0; 1417 } 1418 1419 int 1420 fdclose(struct dev_close_args *ap) 1421 { 1422 cdev_t dev = ap->a_head.a_dev; 1423 fdu_t fdu = dkunit(dev); 1424 struct fd_data *fd; 1425 1426 fd = devclass_get_softc(fd_devclass, fdu); 1427 fd->flags &= ~FD_OPEN; 1428 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG); 1429 1430 return (0); 1431 } 1432 1433 /****************************************************************************/ 1434 /* fdstrategy */ 1435 /****************************************************************************/ 1436 int 1437 fdstrategy(struct dev_strategy_args *ap) 1438 { 1439 cdev_t dev = ap->a_head.a_dev; 1440 struct bio *bio = ap->a_bio; 1441 struct buf *bp = bio->bio_buf; 1442 unsigned nblocks, blknum, cando; 1443 fdu_t fdu; 1444 fdc_p fdc; 1445 fd_p fd; 1446 size_t fdblk; 1447 1448 fdu = dkunit(dev); 1449 fd = devclass_get_softc(fd_devclass, fdu); 1450 if (fd == 0) 1451 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1452 (u_long)major(dev), (u_long)minor(dev)); 1453 fdc = fd->fdc; 1454 if (fd->type == NO_TYPE) { 1455 bp->b_error = ENXIO; 1456 bp->b_flags |= B_ERROR; 1457 goto bad; 1458 }; 1459 1460 fdblk = 128 << (fd->ft.secsize); 1461 if (bp->b_cmd != BUF_CMD_FORMAT) { 1462 if (bio->bio_offset < 0) { 1463 kprintf( 1464 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n", 1465 fdu, bio->bio_offset, bp->b_bcount); 1466 bp->b_error = EINVAL; 1467 bp->b_flags |= B_ERROR; 1468 goto bad; 1469 } 1470 if ((bp->b_bcount % fdblk) != 0) { 1471 bp->b_error = EINVAL; 1472 bp->b_flags |= B_ERROR; 1473 goto bad; 1474 } 1475 } 1476 1477 /* 1478 * Set up block calculations. 1479 */ 1480 if (bio->bio_offset > 20000000LL * fdblk) { 1481 /* 1482 * Reject unreasonably high block number, prevent the 1483 * multiplication below from overflowing. 1484 */ 1485 bp->b_error = EINVAL; 1486 bp->b_flags |= B_ERROR; 1487 goto bad; 1488 } 1489 blknum = (unsigned)(bio->bio_offset / fdblk); 1490 nblocks = fd->ft.size; 1491 bp->b_resid = 0; 1492 if (blknum + (bp->b_bcount / fdblk) > nblocks) { 1493 if (blknum <= nblocks) { 1494 cando = (nblocks - blknum) * fdblk; 1495 bp->b_resid = bp->b_bcount - cando; 1496 if (cando == 0) 1497 goto bad; /* not actually bad but EOF */ 1498 } else { 1499 bp->b_error = EINVAL; 1500 bp->b_flags |= B_ERROR; 1501 goto bad; 1502 } 1503 } 1504 crit_enter(); 1505 bio->bio_driver_info = dev; 1506 bioqdisksort(&fdc->bio_queue, bio); 1507 callout_stop(&fd->toffhandle); 1508 1509 /* Tell devstat we are starting on the transaction */ 1510 devstat_start_transaction(&fd->device_stats); 1511 device_busy(fd->dev); 1512 1513 fdstart(fdc); 1514 crit_exit(); 1515 return(0); 1516 1517 bad: 1518 biodone(bio); 1519 return(0); 1520 } 1521 1522 /***************************************************************\ 1523 * fdstart * 1524 * We have just queued something.. if the controller is not busy * 1525 * then simulate the case where it has just finished a command * 1526 * So that it (the interrupt routine) looks on the queue for more* 1527 * work to do and picks up what we just added. * 1528 * If the controller is already busy, we need do nothing, as it * 1529 * will pick up our work when the present work completes * 1530 \***************************************************************/ 1531 static void 1532 fdstart(struct fdc_data *fdc) 1533 { 1534 crit_enter(); 1535 if(fdc->state == DEVIDLE) 1536 { 1537 fdc_intr(fdc); 1538 } 1539 crit_exit(); 1540 } 1541 1542 static void 1543 fd_iotimeout(void *xfdc) 1544 { 1545 fdc_p fdc; 1546 1547 fdc = xfdc; 1548 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1549 1550 /* 1551 * Due to IBM's brain-dead design, the FDC has a faked ready 1552 * signal, hardwired to ready == true. Thus, any command 1553 * issued if there's no diskette in the drive will _never_ 1554 * complete, and must be aborted by resetting the FDC. 1555 * Many thanks, Big Blue! 1556 * The FDC must not be reset directly, since that would 1557 * interfere with the state machine. Instead, pretend that 1558 * the command completed but was invalid. The state machine 1559 * will reset the FDC and retry once. 1560 */ 1561 crit_enter(); 1562 fdc->status[0] = NE7_ST0_IC_IV; 1563 fdc->flags &= ~FDC_STAT_VALID; 1564 fdc->state = IOTIMEDOUT; 1565 fdc_intr(fdc); 1566 crit_exit(); 1567 } 1568 1569 /* just ensure it is running in a critical section */ 1570 static void 1571 fd_pseudointr(void *xfdc) 1572 { 1573 crit_enter(); 1574 fdc_intr(xfdc); 1575 crit_exit(); 1576 } 1577 1578 /***********************************************************************\ 1579 * fdintr * 1580 * keep calling the state machine until it returns a 0 * 1581 * ALWAYS called at SPLBIO * 1582 \***********************************************************************/ 1583 static void 1584 fdc_intr(void *xfdc) 1585 { 1586 fdc_p fdc = xfdc; 1587 while(fdstate(fdc)) 1588 ; 1589 } 1590 1591 /* 1592 * magic pseudo-DMA initialization for YE FDC. Sets count and 1593 * direction 1594 */ 1595 #define SET_BCDR(fdc,wr,cnt,port) \ 1596 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1597 ((cnt)-1) & 0xff); \ 1598 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1599 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1600 1601 /* 1602 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy 1603 */ 1604 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count) 1605 { 1606 u_char *cptr = (u_char *)addr; 1607 1608 if (cmd == BUF_CMD_READ) { 1609 if (fdc->state != PIOREAD) { 1610 fdc->state = PIOREAD; 1611 return(0); 1612 }; 1613 SET_BCDR(fdc, 0, count, 0); 1614 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1615 FDC_YE_DATAPORT, cptr, count); 1616 } else { 1617 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1618 FDC_YE_DATAPORT, cptr, count); 1619 SET_BCDR(fdc, 0, count, 0); 1620 }; 1621 return(1); 1622 } 1623 1624 /***********************************************************************\ 1625 * The controller state machine. * 1626 * if it returns a non zero value, it should be called again immediatly * 1627 \***********************************************************************/ 1628 static int 1629 fdstate(fdc_p fdc) 1630 { 1631 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3; 1632 unsigned blknum = 0, b_cylinder = 0; 1633 fdu_t fdu = fdc->fdu; 1634 fd_p fd; 1635 struct bio *bio; 1636 struct buf *bp; 1637 struct fd_formb *finfo = NULL; 1638 size_t fdblk; 1639 cdev_t dev; 1640 1641 bio = fdc->bio; 1642 if (bio == NULL) { 1643 bio = bioq_first(&fdc->bio_queue); 1644 if (bio != NULL) { 1645 bioq_remove(&fdc->bio_queue, bio); 1646 fdc->bio = bio; 1647 } 1648 } 1649 if (bio == NULL) { 1650 /***********************************************\ 1651 * nothing left for this controller to do * 1652 * Force into the IDLE state, * 1653 \***********************************************/ 1654 fdc->state = DEVIDLE; 1655 if (fdc->fd) { 1656 device_printf(fdc->fdc_dev, 1657 "unexpected valid fd pointer\n"); 1658 fdc->fd = (fd_p) 0; 1659 fdc->fdu = -1; 1660 } 1661 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1662 return (0); 1663 } 1664 bp = bio->bio_buf; 1665 dev = bio->bio_driver_info; 1666 1667 fdu = dkunit(dev); 1668 fd = devclass_get_softc(fd_devclass, fdu); 1669 fdblk = 128 << fd->ft.secsize; 1670 if (fdc->fd && (fd != fdc->fd)) 1671 device_printf(fd->dev, "confused fd pointers\n"); 1672 read = (bp->b_cmd == BUF_CMD_READ); 1673 format = (bp->b_cmd == BUF_CMD_FORMAT); 1674 if (format) { 1675 finfo = (struct fd_formb *)bp->b_data; 1676 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 1677 - (char *)finfo; 1678 } 1679 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) { 1680 blknum = (unsigned)(bio->bio_offset / fdblk) + 1681 fd->skip /fdblk; 1682 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads); 1683 } 1684 TRACE1("fd%d", fdu); 1685 TRACE1("[%s]", fdstates[fdc->state]); 1686 TRACE1("(0x%x)", fd->flags); 1687 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd); 1688 switch (fdc->state) 1689 { 1690 case DEVIDLE: 1691 case FINDWORK: /* we have found new work */ 1692 fdc->retry = 0; 1693 fd->skip = 0; 1694 fdc->fd = fd; 1695 fdc->fdu = fdu; 1696 fdc->fdctl_wr(fdc, fd->ft.trans); 1697 TRACE1("[0x%x->FDCTL]", fd->ft.trans); 1698 /*******************************************************\ 1699 * If the next drive has a motor startup pending, then * 1700 * it will start up in its own good time * 1701 \*******************************************************/ 1702 if(fd->flags & FD_MOTOR_WAIT) { 1703 fdc->state = MOTORWAIT; 1704 return (0); /* come back later */ 1705 } 1706 /*******************************************************\ 1707 * Maybe if it's not starting, it SHOULD be starting * 1708 \*******************************************************/ 1709 if (!(fd->flags & FD_MOTOR)) 1710 { 1711 fdc->state = MOTORWAIT; 1712 fd_turnon(fd); 1713 return (0); 1714 } 1715 else /* at least make sure we are selected */ 1716 { 1717 set_motor(fdc, fd->fdsu, TURNON); 1718 } 1719 if (fdc->flags & FDC_NEEDS_RESET) { 1720 fdc->state = RESETCTLR; 1721 fdc->flags &= ~FDC_NEEDS_RESET; 1722 } else 1723 fdc->state = DOSEEK; 1724 break; 1725 case DOSEEK: 1726 if (b_cylinder == (unsigned)fd->track) 1727 { 1728 fdc->state = SEEKCOMPLETE; 1729 break; 1730 } 1731 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 1732 fd->fdsu, b_cylinder * fd->ft.steptrac, 1733 0)) 1734 { 1735 /* 1736 * seek command not accepted, looks like 1737 * the FDC went off to the Saints... 1738 */ 1739 fdc->retry = 6; /* try a reset */ 1740 return(retrier(fdc)); 1741 } 1742 fd->track = FD_NO_TRACK; 1743 fdc->state = SEEKWAIT; 1744 return(0); /* will return later */ 1745 case SEEKWAIT: 1746 /* allow heads to settle */ 1747 callout_reset(&fdc->pseudointr_ch, hz / 16, 1748 fd_pseudointr, fdc); 1749 fdc->state = SEEKCOMPLETE; 1750 return(0); /* will return later */ 1751 case SEEKCOMPLETE : /* SEEK DONE, START DMA */ 1752 /* Make sure seek really happened*/ 1753 if(fd->track == FD_NO_TRACK) { 1754 int descyl = b_cylinder * fd->ft.steptrac; 1755 do { 1756 /* 1757 * This might be a "ready changed" interrupt, 1758 * which cannot really happen since the 1759 * RDY pin is hardwired to + 5 volts. This 1760 * generally indicates a "bouncing" intr 1761 * line, so do one of the following: 1762 * 1763 * When running on an enhanced FDC that is 1764 * known to not go stuck after responding 1765 * with INVALID, fetch all interrupt states 1766 * until seeing either an INVALID or a 1767 * real interrupt condition. 1768 * 1769 * When running on a dumb old NE765, give 1770 * up immediately. The controller will 1771 * provide up to four dummy RC interrupt 1772 * conditions right after reset (for the 1773 * corresponding four drives), so this is 1774 * our only chance to get notice that it 1775 * was not the FDC that caused the interrupt. 1776 */ 1777 if (fd_sense_int(fdc, &st0, &cyl) 1778 == FD_NOT_VALID) 1779 return 0; 1780 if(fdc->fdct == FDC_NE765 1781 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1782 return 0; /* hope for a real intr */ 1783 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1784 1785 if (0 == descyl) { 1786 int failed = 0; 1787 /* 1788 * seek to cyl 0 requested; make sure we are 1789 * really there 1790 */ 1791 if (fd_sense_drive_status(fdc, &st3)) 1792 failed = 1; 1793 if ((st3 & NE7_ST3_T0) == 0) { 1794 kprintf( 1795 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 1796 fdu, st3, NE7_ST3BITS); 1797 failed = 1; 1798 } 1799 1800 if (failed) { 1801 if(fdc->retry < 3) 1802 fdc->retry = 3; 1803 return (retrier(fdc)); 1804 } 1805 } 1806 1807 if (cyl != descyl) { 1808 kprintf( 1809 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 1810 fdu, descyl, cyl, st0); 1811 if (fdc->retry < 3) 1812 fdc->retry = 3; 1813 return (retrier(fdc)); 1814 } 1815 } 1816 1817 fd->track = b_cylinder; 1818 if (!(fdc->flags & FDC_NODMA)) { 1819 isa_dmastart(isa_dmabp(bp), 1820 bp->b_data+fd->skip, 1821 format ? bp->b_bcount : fdblk, fdc->dmachan); 1822 } 1823 sectrac = fd->ft.sectrac; 1824 sec = blknum % (sectrac * fd->ft.heads); 1825 head = sec / sectrac; 1826 sec = sec % sectrac + 1; 1827 fd->hddrv = ((head&1)<<2)+fdu; 1828 1829 if(format || !read) 1830 { 1831 /* make sure the drive is writable */ 1832 if(fd_sense_drive_status(fdc, &st3) != 0) 1833 { 1834 /* stuck controller? */ 1835 if (!(fdc->flags & FDC_NODMA)) 1836 isa_dmadone(isa_dmabp(bp), 1837 bp->b_data + fd->skip, 1838 format ? bp->b_bcount : fdblk, 1839 fdc->dmachan); 1840 fdc->retry = 6; /* reset the beast */ 1841 return (retrier(fdc)); 1842 } 1843 if(st3 & NE7_ST3_WP) 1844 { 1845 /* 1846 * XXX YES! this is ugly. 1847 * in order to force the current operation 1848 * to fail, we will have to fake an FDC 1849 * error - all error handling is done 1850 * by the retrier() 1851 */ 1852 fdc->status[0] = NE7_ST0_IC_AT; 1853 fdc->status[1] = NE7_ST1_NW; 1854 fdc->status[2] = 0; 1855 fdc->status[3] = fd->track; 1856 fdc->status[4] = head; 1857 fdc->status[5] = sec; 1858 fdc->retry = 8; /* break out immediately */ 1859 fdc->state = IOTIMEDOUT; /* not really... */ 1860 return (1); 1861 } 1862 } 1863 1864 if (format) { 1865 if (fdc->flags & FDC_NODMA) { 1866 /* 1867 * This seems to be necessary for 1868 * whatever obscure reason; if we omit 1869 * it, we end up filling the sector ID 1870 * fields of the newly formatted track 1871 * entirely with garbage, causing 1872 * `wrong cylinder' errors all over 1873 * the place when trying to read them 1874 * back. 1875 * 1876 * Umpf. 1877 */ 1878 SET_BCDR(fdc, 1, bp->b_bcount, 0); 1879 1880 (void)fdcpio(fdc,bp->b_cmd, 1881 bp->b_data+fd->skip, 1882 bp->b_bcount); 1883 1884 } 1885 /* formatting */ 1886 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu, 1887 finfo->fd_formb_secshift, 1888 finfo->fd_formb_nsecs, 1889 finfo->fd_formb_gaplen, 1890 finfo->fd_formb_fillbyte, 0)) { 1891 /* controller fell over */ 1892 if (!(fdc->flags & FDC_NODMA)) 1893 isa_dmadone(isa_dmabp(bp), 1894 bp->b_data + fd->skip, 1895 format ? bp->b_bcount : fdblk, 1896 fdc->dmachan); 1897 fdc->retry = 6; 1898 return (retrier(fdc)); 1899 } 1900 } else { 1901 if (fdc->flags & FDC_NODMA) { 1902 /* 1903 * this seems to be necessary even when 1904 * reading data 1905 */ 1906 SET_BCDR(fdc, 1, fdblk, 0); 1907 1908 /* 1909 * perform the write pseudo-DMA before 1910 * the WRITE command is sent 1911 */ 1912 if (!read) 1913 (void)fdcpio(fdc,bp->b_cmd, 1914 bp->b_data+fd->skip, 1915 fdblk); 1916 } 1917 if (fd_cmd(fdc, 9, 1918 (read ? NE7CMD_READ : NE7CMD_WRITE), 1919 head << 2 | fdu, /* head & unit */ 1920 fd->track, /* track */ 1921 head, 1922 sec, /* sector + 1 */ 1923 fd->ft.secsize, /* sector size */ 1924 sectrac, /* sectors/track */ 1925 fd->ft.gap, /* gap size */ 1926 fd->ft.datalen, /* data length */ 1927 0)) { 1928 /* the beast is sleeping again */ 1929 if (!(fdc->flags & FDC_NODMA)) 1930 isa_dmadone(isa_dmabp(bp), 1931 bp->b_data + fd->skip, 1932 format ? bp->b_bcount : fdblk, 1933 fdc->dmachan); 1934 fdc->retry = 6; 1935 return (retrier(fdc)); 1936 } 1937 } 1938 if (fdc->flags & FDC_NODMA) 1939 /* 1940 * if this is a read, then simply await interrupt 1941 * before performing PIO 1942 */ 1943 if (read && !fdcpio(fdc,bp->b_cmd, 1944 bp->b_data+fd->skip,fdblk)) { 1945 callout_reset(&fd->tohandle, hz, 1946 fd_iotimeout, fdc); 1947 return(0); /* will return later */ 1948 }; 1949 1950 /* 1951 * write (or format) operation will fall through and 1952 * await completion interrupt 1953 */ 1954 fdc->state = IOCOMPLETE; 1955 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc); 1956 return (0); /* will return later */ 1957 case PIOREAD: 1958 /* 1959 * actually perform the PIO read. The IOCOMPLETE case 1960 * removes the timeout for us. 1961 */ 1962 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk); 1963 fdc->state = IOCOMPLETE; 1964 /* FALLTHROUGH */ 1965 case IOCOMPLETE: /* IO DONE, post-analyze */ 1966 callout_stop(&fd->tohandle); 1967 1968 if (fd_read_status(fdc, fd->fdsu)) { 1969 if (!(fdc->flags & FDC_NODMA)) { 1970 isa_dmadone(isa_dmabp(bp), 1971 bp->b_data + fd->skip, 1972 format ? bp->b_bcount : fdblk, 1973 fdc->dmachan); 1974 } 1975 if (fdc->retry < 6) 1976 fdc->retry = 6; /* force a reset */ 1977 return (retrier(fdc)); 1978 } 1979 1980 fdc->state = IOTIMEDOUT; 1981 1982 /* FALLTHROUGH */ 1983 1984 case IOTIMEDOUT: 1985 if (!(fdc->flags & FDC_NODMA)) { 1986 isa_dmadone(isa_dmabp(bp), 1987 bp->b_data + fd->skip, 1988 format ? bp->b_bcount : fdblk, fdc->dmachan); 1989 } 1990 if (fdc->status[0] & NE7_ST0_IC) { 1991 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1992 && fdc->status[1] & NE7_ST1_OR) { 1993 /* 1994 * DMA overrun. Someone hogged the bus and 1995 * didn't release it in time for the next 1996 * FDC transfer. 1997 * 1998 * We normally restart this without bumping 1999 * the retry counter. However, in case 2000 * something is seriously messed up (like 2001 * broken hardware), we rather limit the 2002 * number of retries so the IO operation 2003 * doesn't block indefinately. 2004 */ 2005 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 2006 fdc->state = SEEKCOMPLETE; 2007 return (1); 2008 } /* else fall through */ 2009 } 2010 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 2011 && fdc->retry < 6) 2012 fdc->retry = 6; /* force a reset */ 2013 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2014 && fdc->status[2] & NE7_ST2_WC 2015 && fdc->retry < 3) 2016 fdc->retry = 3; /* force recalibrate */ 2017 return (retrier(fdc)); 2018 } 2019 /* All OK */ 2020 /* Operation successful, retry DMA overruns again next time. */ 2021 fdc->dma_overruns = 0; 2022 fd->skip += fdblk; 2023 if (!format && fd->skip < bp->b_bcount - bp->b_resid) { 2024 /* set up next transfer */ 2025 fdc->state = DOSEEK; 2026 } else { 2027 /* ALL DONE */ 2028 fd->skip = 0; 2029 fdc->bio = NULL; 2030 device_unbusy(fd->dev); 2031 devstat_end_transaction_buf(&fd->device_stats, bp); 2032 biodone(bio); 2033 fdc->fd = (fd_p) 0; 2034 fdc->fdu = -1; 2035 fdc->state = FINDWORK; 2036 } 2037 return (1); 2038 case RESETCTLR: 2039 fdc_reset(fdc); 2040 fdc->retry++; 2041 fdc->state = RESETCOMPLETE; 2042 return (0); 2043 case RESETCOMPLETE: 2044 /* 2045 * Discard all the results from the reset so that they 2046 * can't cause an unexpected interrupt later. 2047 */ 2048 for (i = 0; i < 4; i++) 2049 (void)fd_sense_int(fdc, &st0, &cyl); 2050 fdc->state = STARTRECAL; 2051 /* Fall through. */ 2052 case STARTRECAL: 2053 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 2054 /* arrgl */ 2055 fdc->retry = 6; 2056 return (retrier(fdc)); 2057 } 2058 fdc->state = RECALWAIT; 2059 return (0); /* will return later */ 2060 case RECALWAIT: 2061 /* allow heads to settle */ 2062 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc); 2063 fdc->state = RECALCOMPLETE; 2064 return (0); /* will return later */ 2065 case RECALCOMPLETE: 2066 do { 2067 /* 2068 * See SEEKCOMPLETE for a comment on this: 2069 */ 2070 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2071 return 0; 2072 if(fdc->fdct == FDC_NE765 2073 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2074 return 0; /* hope for a real intr */ 2075 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2076 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2077 { 2078 if(fdc->retry > 3) 2079 /* 2080 * a recalibrate from beyond cylinder 77 2081 * will "fail" due to the FDC limitations; 2082 * since people used to complain much about 2083 * the failure message, try not logging 2084 * this one if it seems to be the first 2085 * time in a line 2086 */ 2087 kprintf("fd%d: recal failed ST0 %b cyl %d\n", 2088 fdu, st0, NE7_ST0BITS, cyl); 2089 if(fdc->retry < 3) fdc->retry = 3; 2090 return (retrier(fdc)); 2091 } 2092 fd->track = 0; 2093 /* Seek (probably) necessary */ 2094 fdc->state = DOSEEK; 2095 return (1); /* will return immediatly */ 2096 case MOTORWAIT: 2097 if(fd->flags & FD_MOTOR_WAIT) 2098 { 2099 return (0); /* time's not up yet */ 2100 } 2101 if (fdc->flags & FDC_NEEDS_RESET) { 2102 fdc->state = RESETCTLR; 2103 fdc->flags &= ~FDC_NEEDS_RESET; 2104 } else { 2105 /* 2106 * If all motors were off, then the controller was 2107 * reset, so it has lost track of the current 2108 * cylinder. Recalibrate to handle this case. 2109 * But first, discard the results of the reset. 2110 */ 2111 fdc->state = RESETCOMPLETE; 2112 } 2113 return (1); /* will return immediatly */ 2114 default: 2115 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2116 if (fd_read_status(fdc, fd->fdsu) == 0) 2117 kprintf("FDC status :%x %x %x %x %x %x %x ", 2118 fdc->status[0], 2119 fdc->status[1], 2120 fdc->status[2], 2121 fdc->status[3], 2122 fdc->status[4], 2123 fdc->status[5], 2124 fdc->status[6] ); 2125 else 2126 kprintf("No status available "); 2127 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2128 { 2129 kprintf("[controller is dead now]\n"); 2130 return (0); 2131 } 2132 kprintf("ST0 = %x, PCN = %x\n", st0, cyl); 2133 return (0); 2134 } 2135 /*XXX confusing: some branches return immediately, others end up here*/ 2136 return (1); /* Come back immediatly to new state */ 2137 } 2138 2139 static int 2140 retrier(struct fdc_data *fdc) 2141 { 2142 struct bio *bio; 2143 struct buf *bp; 2144 struct fd_data *fd; 2145 cdev_t dev; 2146 int fdu; 2147 2148 bio = fdc->bio; 2149 bp = bio->bio_buf; 2150 dev = bio->bio_driver_info; 2151 2152 /* XXX shouldn't this be cached somewhere? */ 2153 fdu = dkunit(dev); 2154 fd = devclass_get_softc(fd_devclass, fdu); 2155 if (fd->options & FDOPT_NORETRY) 2156 goto fail; 2157 2158 switch (fdc->retry) { 2159 case 0: case 1: case 2: 2160 fdc->state = SEEKCOMPLETE; 2161 break; 2162 case 3: case 4: case 5: 2163 fdc->state = STARTRECAL; 2164 break; 2165 case 6: 2166 fdc->state = RESETCTLR; 2167 break; 2168 case 7: 2169 break; 2170 default: 2171 fail: 2172 { 2173 int printerror = (fd->options & FDOPT_NOERRLOG) == 0; 2174 2175 if (printerror) { 2176 /* 2177 * note: use the correct device for more 2178 * verbose error reporting. 2179 */ 2180 diskerr(bio, dev, 2181 "hard error", LOG_PRINTF, 2182 fdc->fd->skip); 2183 } 2184 if (printerror) { 2185 if (fdc->flags & FDC_STAT_VALID) 2186 kprintf( 2187 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2188 fdc->status[0], NE7_ST0BITS, 2189 fdc->status[1], NE7_ST1BITS, 2190 fdc->status[2], NE7_ST2BITS, 2191 fdc->status[3], fdc->status[4], 2192 fdc->status[5]); 2193 else 2194 kprintf(" (No status)\n"); 2195 } 2196 } 2197 bp->b_flags |= B_ERROR; 2198 bp->b_error = EIO; 2199 bp->b_resid += bp->b_bcount - fdc->fd->skip; 2200 fdc->bio = NULL; 2201 fdc->fd->skip = 0; 2202 device_unbusy(fd->dev); 2203 devstat_end_transaction_buf(&fdc->fd->device_stats, bp); 2204 biodone(bio); 2205 fdc->state = FINDWORK; 2206 fdc->flags |= FDC_NEEDS_RESET; 2207 fdc->fd = (fd_p) 0; 2208 fdc->fdu = -1; 2209 return (1); 2210 } 2211 fdc->retry++; 2212 return (1); 2213 } 2214 2215 static void 2216 fdformat_wakeup(struct bio *bio) 2217 { 2218 bio->bio_buf->b_cmd = BUF_CMD_DONE; 2219 wakeup(bio); 2220 } 2221 2222 static int 2223 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred) 2224 { 2225 fdu_t fdu; 2226 fd_p fd; 2227 struct buf *bp; 2228 int rv = 0; 2229 size_t fdblk; 2230 2231 fdu = dkunit(dev); 2232 fd = devclass_get_softc(fd_devclass, fdu); 2233 fdblk = 128 << fd->ft.secsize; 2234 2235 /* set up a buffer header for fdstrategy() */ 2236 bp = getpbuf(NULL); 2237 bp->b_cmd = BUF_CMD_FORMAT; 2238 2239 /* 2240 * calculate a fake blkno, so fdstrategy() would initiate a 2241 * seek to the requested cylinder 2242 */ 2243 bp->b_bio1.bio_offset = (off_t)(finfo->cyl * 2244 (fd->ft.sectrac * fd->ft.heads) 2245 + finfo->head * fd->ft.sectrac) * fdblk; 2246 bp->b_bio1.bio_driver_info = dev; 2247 bp->b_bio1.bio_done = fdformat_wakeup; 2248 2249 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; 2250 bp->b_data = (caddr_t)finfo; 2251 2252 /* now do the format */ 2253 dev_dstrategy(dev, &bp->b_bio1); 2254 2255 /* ...and wait for it to complete */ 2256 crit_enter(); 2257 while (bp->b_cmd != BUF_CMD_DONE) { 2258 rv = tsleep(&bp->b_bio1, 0, "fdform", 20 * hz); 2259 if (rv == EWOULDBLOCK) 2260 break; 2261 } 2262 crit_exit(); 2263 2264 if (rv == EWOULDBLOCK) { 2265 /* timed out */ 2266 rv = EIO; 2267 device_unbusy(fd->dev); 2268 biodone(&bp->b_bio1); 2269 } 2270 if (bp->b_flags & B_ERROR) 2271 rv = bp->b_error; 2272 /* 2273 * allow the process to be swapped 2274 */ 2275 relpbuf(bp, NULL); 2276 return rv; 2277 } 2278 2279 /* 2280 * TODO: don't allocate buffer on stack. 2281 */ 2282 2283 static int 2284 fdioctl(struct dev_ioctl_args *ap) 2285 { 2286 cdev_t dev = ap->a_head.a_dev; 2287 fdu_t fdu = dkunit(dev); 2288 fd_p fd = devclass_get_softc(fd_devclass, fdu); 2289 size_t fdblk; 2290 struct fdc_status *fsp; 2291 int error = 0; 2292 2293 fdblk = 128 << fd->ft.secsize; 2294 2295 switch (ap->a_cmd) { 2296 case FD_FORM: 2297 if ((ap->a_fflag & FWRITE) == 0) 2298 error = EBADF; /* must be opened for writing */ 2299 else if (((struct fd_formb *)ap->a_data)->format_version != 2300 FD_FORMAT_VERSION) 2301 error = EINVAL; /* wrong version of formatting prog */ 2302 else 2303 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred); 2304 break; 2305 2306 case FD_GTYPE: /* get drive type */ 2307 *(struct fd_type *)ap->a_data = fd->ft; 2308 break; 2309 2310 case FD_STYPE: /* set drive type */ 2311 /* this is considered harmful; only allow for superuser */ 2312 if (suser_cred(ap->a_cred, 0) != 0) 2313 return EPERM; 2314 fd->ft = *(struct fd_type *)ap->a_data; 2315 break; 2316 2317 case FD_GOPTS: /* get drive options */ 2318 *(int *)ap->a_data = fd->options; 2319 break; 2320 2321 case FD_SOPTS: /* set drive options */ 2322 fd->options = *(int *)ap->a_data; 2323 break; 2324 2325 case FD_GSTAT: 2326 fsp = (struct fdc_status *)ap->a_data; 2327 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2328 return EINVAL; 2329 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2330 break; 2331 2332 default: 2333 error = ENOTTY; 2334 break; 2335 } 2336 return (error); 2337 } 2338 2339 /* 2340 * Hello emacs, these are the 2341 * Local Variables: 2342 * c-indent-level: 8 2343 * c-continued-statement-offset: 8 2344 * c-continued-brace-offset: 0 2345 * c-brace-offset: -8 2346 * c-brace-imaginary-offset: 0 2347 * c-argdecl-indent: 8 2348 * c-label-offset: -8 2349 * c++-hanging-braces: 1 2350 * c++-access-specifier-offset: -8 2351 * c++-empty-arglist-indent: 8 2352 * c++-friend-offset: 0 2353 * End: 2354 */ 2355