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 1.36 2006/12/22 23:26:16 swildner Exp $ 55 * 56 */ 57 58 #include "opt_fdc.h" 59 #include "use_pccard.h" 60 61 #include <sys/param.h> 62 #include <sys/systm.h> 63 #include <sys/bootmaj.h> 64 #include <sys/kernel.h> 65 #include <sys/buf.h> 66 #include <sys/bus.h> 67 #include <sys/conf.h> 68 #include <sys/disklabel.h> 69 #include <sys/devicestat.h> 70 #include <sys/fcntl.h> 71 #include <sys/malloc.h> 72 #include <sys/module.h> 73 #include <sys/proc.h> 74 #include <sys/syslog.h> 75 #include <sys/device.h> 76 #include <sys/bus.h> 77 #include <sys/rman.h> 78 #include <sys/buf2.h> 79 #include <sys/thread2.h> 80 81 #include <machine/clock.h> 82 #include <machine/ioctl_fd.h> 83 #include <machine/stdarg.h> 84 85 #include <bus/isa/isavar.h> 86 #include <bus/isa/isareg.h> 87 #include "fdreg.h" 88 #include "fdc.h" 89 #include <bus/isa/rtc.h> 90 91 /* configuration flags */ 92 #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */ 93 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ 94 95 /* internally used only, not really from CMOS: */ 96 #define RTCFDT_144M_PRETENDED 0x1000 97 98 /* error returns for fd_cmd() */ 99 #define FD_FAILED -1 100 #define FD_NOT_VALID -2 101 #define FDC_ERRMAX 100 /* do not log more */ 102 /* 103 * Stop retrying after this many DMA overruns. Since each retry takes 104 * one revolution, with 300 rpm., 25 retries take approximately 10 105 * seconds which the read attempt will block in case the DMA overrun 106 * is persistent. 107 */ 108 #define FDC_DMAOV_MAX 25 109 110 /* 111 * Timeout value for the PIO loops to wait until the FDC main status 112 * register matches our expectations (request for master, direction 113 * bit). This is supposed to be a number of microseconds, although 114 * timing might actually not be very accurate. 115 * 116 * Timeouts of 100 msec are believed to be required for some broken 117 * (old) hardware. 118 */ 119 #define FDSTS_TIMEOUT 100000 120 121 #define NUMTYPES 17 122 #define NUMDENS (NUMTYPES - 7) 123 124 /* These defines (-1) must match index for fd_types */ 125 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */ 126 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */ 127 #define FD_1720 1 128 #define FD_1480 2 129 #define FD_1440 3 130 #define FD_1200 4 131 #define FD_820 5 132 #define FD_800 6 133 #define FD_720 7 134 #define FD_360 8 135 #define FD_640 9 136 #define FD_1232 10 137 138 #define FD_1480in5_25 11 139 #define FD_1440in5_25 12 140 #define FD_820in5_25 13 141 #define FD_800in5_25 14 142 #define FD_720in5_25 15 143 #define FD_360in5_25 16 144 #define FD_640in5_25 17 145 146 147 static struct fd_type fd_types[NUMTYPES] = 148 { 149 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */ 150 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */ 151 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */ 152 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */ 153 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */ 154 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */ 155 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */ 156 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */ 157 { 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */ 158 { 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */ 159 160 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */ 161 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */ 162 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */ 163 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */ 164 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */ 165 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */ 166 { 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */ 167 }; 168 169 #define DRVS_PER_CTLR 2 /* 2 floppies */ 170 171 /***********************************************************************\ 172 * Per controller structure. * 173 \***********************************************************************/ 174 devclass_t fdc_devclass; 175 176 /***********************************************************************\ 177 * Per drive structure. * 178 * N per controller (DRVS_PER_CTLR) * 179 \***********************************************************************/ 180 struct fd_data { 181 struct fdc_data *fdc; /* pointer to controller structure */ 182 int fdsu; /* this units number on this controller */ 183 int type; /* Drive type (FD_1440...) */ 184 struct fd_type *ft; /* pointer to the type descriptor */ 185 int flags; 186 #define FD_OPEN 0x01 /* it's open */ 187 #define FD_ACTIVE 0x02 /* it's active */ 188 #define FD_MOTOR 0x04 /* motor should be on */ 189 #define FD_MOTOR_WAIT 0x08 /* motor coming up */ 190 int skip; 191 int hddrv; 192 #define FD_NO_TRACK -2 193 int track; /* where we think the head is */ 194 int options; /* user configurable options, see ioctl_fd.h */ 195 struct callout toffhandle; 196 struct callout tohandle; 197 struct callout motor; 198 struct devstat device_stats; 199 device_t dev; 200 fdu_t fdu; 201 }; 202 203 struct fdc_ivars { 204 int fdunit; 205 }; 206 static devclass_t fd_devclass; 207 208 /***********************************************************************\ 209 * Throughout this file the following conventions will be used: * 210 * fd is a pointer to the fd_data struct for the drive in question * 211 * fdc is a pointer to the fdc_data struct for the controller * 212 * fdu is the floppy drive unit number * 213 * fdcu is the floppy controller unit number * 214 * fdsu is the floppy drive unit number on that controller. (sub-unit) * 215 \***********************************************************************/ 216 217 /* internal functions */ 218 static void fdc_intr(void *); 219 static void set_motor(struct fdc_data *, int, int); 220 # define TURNON 1 221 # define TURNOFF 0 222 static timeout_t fd_turnoff; 223 static timeout_t fd_motor_on; 224 static void fd_turnon(struct fd_data *); 225 static void fdc_reset(fdc_p); 226 static int fd_in(struct fdc_data *, int *); 227 static int out_fdc(struct fdc_data *, int); 228 static void fdstart(struct fdc_data *); 229 static timeout_t fd_iotimeout; 230 static timeout_t fd_pseudointr; 231 static int fdstate(struct fdc_data *); 232 static int retrier(struct fdc_data *); 233 static int fdformat(cdev_t, struct fd_formb *, struct ucred *); 234 235 static int enable_fifo(fdc_p fdc); 236 237 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 238 239 240 #define DEVIDLE 0 241 #define FINDWORK 1 242 #define DOSEEK 2 243 #define SEEKCOMPLETE 3 244 #define IOCOMPLETE 4 245 #define RECALCOMPLETE 5 246 #define STARTRECAL 6 247 #define RESETCTLR 7 248 #define SEEKWAIT 8 249 #define RECALWAIT 9 250 #define MOTORWAIT 10 251 #define IOTIMEDOUT 11 252 #define RESETCOMPLETE 12 253 #define PIOREAD 13 254 255 #ifdef FDC_DEBUG 256 static char const * const fdstates[] = 257 { 258 "DEVIDLE", 259 "FINDWORK", 260 "DOSEEK", 261 "SEEKCOMPLETE", 262 "IOCOMPLETE", 263 "RECALCOMPLETE", 264 "STARTRECAL", 265 "RESETCTLR", 266 "SEEKWAIT", 267 "RECALWAIT", 268 "MOTORWAIT", 269 "IOTIMEDOUT", 270 "RESETCOMPLETE", 271 "PIOREAD", 272 }; 273 274 /* CAUTION: fd_debug causes huge amounts of logging output */ 275 static int volatile fd_debug = 0; 276 #define TRACE0(arg) if(fd_debug) kprintf(arg) 277 #define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2) 278 #else /* FDC_DEBUG */ 279 #define TRACE0(arg) 280 #define TRACE1(arg1, arg2) 281 #endif /* FDC_DEBUG */ 282 283 void 284 fdout_wr(fdc_p fdc, u_int8_t v) 285 { 286 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 287 } 288 289 static u_int8_t 290 fdsts_rd(fdc_p fdc) 291 { 292 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 293 } 294 295 static void 296 fddata_wr(fdc_p fdc, u_int8_t v) 297 { 298 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 299 } 300 301 static u_int8_t 302 fddata_rd(fdc_p fdc) 303 { 304 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 305 } 306 307 static void 308 fdctl_wr_isa(fdc_p fdc, u_int8_t v) 309 { 310 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 311 } 312 313 #if 0 314 315 static u_int8_t 316 fdin_rd(fdc_p fdc) 317 { 318 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 319 } 320 321 #endif 322 323 static d_open_t Fdopen; /* NOTE, not fdopen */ 324 static d_close_t fdclose; 325 static d_ioctl_t fdioctl; 326 static d_strategy_t fdstrategy; 327 328 static struct dev_ops fd_ops = { 329 { "fd", FD_CDEV_MAJOR, D_DISK }, 330 .d_open = Fdopen, 331 .d_close = fdclose, 332 .d_read = physread, 333 .d_write = physwrite, 334 .d_ioctl = fdioctl, 335 .d_strategy = fdstrategy, 336 }; 337 338 static int 339 fdc_err(struct fdc_data *fdc, const char *s) 340 { 341 fdc->fdc_errs++; 342 if (s) { 343 if (fdc->fdc_errs < FDC_ERRMAX) 344 device_printf(fdc->fdc_dev, "%s", s); 345 else if (fdc->fdc_errs == FDC_ERRMAX) 346 device_printf(fdc->fdc_dev, "too many errors, not " 347 "logging any more\n"); 348 } 349 350 return FD_FAILED; 351 } 352 353 /* 354 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 355 * Unit number, 356 * # of output bytes, output bytes as ints ..., 357 * # of input bytes, input bytes as ints ... 358 */ 359 int 360 fd_cmd(struct fdc_data *fdc, int n_out, ...) 361 { 362 u_char cmd; 363 int n_in; 364 int n; 365 __va_list ap; 366 367 __va_start(ap, n_out); 368 cmd = (u_char)(__va_arg(ap, int)); 369 __va_end(ap); 370 __va_start(ap, n_out); 371 for (n = 0; n < n_out; n++) 372 { 373 if (out_fdc(fdc, __va_arg(ap, int)) < 0) 374 { 375 char msg[50]; 376 ksnprintf(msg, sizeof(msg), 377 "cmd %x failed at out byte %d of %d\n", 378 cmd, n + 1, n_out); 379 return fdc_err(fdc, msg); 380 } 381 } 382 n_in = __va_arg(ap, int); 383 for (n = 0; n < n_in; n++) 384 { 385 int *ptr = __va_arg(ap, int *); 386 if (fd_in(fdc, ptr) < 0) 387 { 388 char msg[50]; 389 ksnprintf(msg, sizeof(msg), 390 "cmd %02x failed at in byte %d of %d\n", 391 cmd, n + 1, n_in); 392 return fdc_err(fdc, msg); 393 } 394 } 395 396 return 0; 397 } 398 399 static int 400 enable_fifo(fdc_p fdc) 401 { 402 int i, j; 403 404 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 405 406 /* 407 * XXX: 408 * Cannot use fd_cmd the normal way here, since 409 * this might be an invalid command. Thus we send the 410 * first byte, and check for an early turn of data directon. 411 */ 412 413 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 414 return fdc_err(fdc, "Enable FIFO failed\n"); 415 416 /* If command is invalid, return */ 417 j = FDSTS_TIMEOUT; 418 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 419 != NE7_RQM && j-- > 0) { 420 if (i == (NE7_DIO | NE7_RQM)) { 421 fdc_reset(fdc); 422 return FD_FAILED; 423 } 424 DELAY(1); 425 } 426 if (j<0 || 427 fd_cmd(fdc, 3, 428 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 429 fdc_reset(fdc); 430 return fdc_err(fdc, "Enable FIFO failed\n"); 431 } 432 fdc->flags |= FDC_HAS_FIFO; 433 return 0; 434 } 435 if (fd_cmd(fdc, 4, 436 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 437 return fdc_err(fdc, "Re-enable FIFO failed\n"); 438 return 0; 439 } 440 441 static int 442 fd_sense_drive_status(fdc_p fdc, int *st3p) 443 { 444 int st3; 445 446 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 447 { 448 return fdc_err(fdc, "Sense Drive Status failed\n"); 449 } 450 if (st3p) 451 *st3p = st3; 452 453 return 0; 454 } 455 456 static int 457 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 458 { 459 int cyl, st0, ret; 460 461 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 462 if (ret) { 463 (void)fdc_err(fdc, 464 "sense intr err reading stat reg 0\n"); 465 return ret; 466 } 467 468 if (st0p) 469 *st0p = st0; 470 471 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 472 /* 473 * There doesn't seem to have been an interrupt. 474 */ 475 return FD_NOT_VALID; 476 } 477 478 if (fd_in(fdc, &cyl) < 0) { 479 return fdc_err(fdc, "can't get cyl num\n"); 480 } 481 482 if (cylp) 483 *cylp = cyl; 484 485 return 0; 486 } 487 488 489 static int 490 fd_read_status(fdc_p fdc, int fdsu) 491 { 492 int i, ret; 493 494 for (i = 0; i < 7; i++) { 495 /* 496 * XXX types are poorly chosen. Only bytes can by read 497 * from the hardware, but fdc->status[] wants u_ints and 498 * fd_in() gives ints. 499 */ 500 int status; 501 502 ret = fd_in(fdc, &status); 503 fdc->status[i] = status; 504 if (ret != 0) 505 break; 506 } 507 508 if (ret == 0) 509 fdc->flags |= FDC_STAT_VALID; 510 else 511 fdc->flags &= ~FDC_STAT_VALID; 512 513 return ret; 514 } 515 516 /****************************************************************************/ 517 /* autoconfiguration stuff */ 518 /****************************************************************************/ 519 520 int 521 fdc_alloc_resources(struct fdc_data *fdc) 522 { 523 device_t dev; 524 int ispnp, ispcmcia; 525 526 dev = fdc->fdc_dev; 527 ispnp = (fdc->flags & FDC_ISPNP) != 0; 528 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 529 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 530 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 531 532 /* 533 * On standard ISA, we don't just use an 8 port range 534 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 535 * register at 0x3f6. 536 * 537 * Isn't PC hardware wonderful. 538 * 539 * The Y-E Data PCMCIA FDC doesn't have this problem, it 540 * uses the register with offset 6 for pseudo-DMA, and the 541 * one with offset 7 as control register. 542 */ 543 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 544 &fdc->rid_ioport, 0ul, ~0ul, 545 ispcmcia ? 8 : (ispnp ? 1 : 6), 546 RF_ACTIVE); 547 if (fdc->res_ioport == 0) { 548 device_printf(dev, "cannot reserve I/O port range\n"); 549 return ENXIO; 550 } 551 fdc->portt = rman_get_bustag(fdc->res_ioport); 552 fdc->porth = rman_get_bushandle(fdc->res_ioport); 553 554 if (!ispcmcia) { 555 /* 556 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 557 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 558 * by checking the size and adjust the port address 559 * accordingly. 560 */ 561 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 562 fdc->port_off = -2; 563 564 /* 565 * Register the control port range as rid 1 if it 566 * isn't there already. Most PnP BIOSen will have 567 * already done this but non-PnP configurations don't. 568 * 569 * And some (!!) report 0x3f2-0x3f5 and completely 570 * leave out the control register! It seems that some 571 * non-antique controller chips have a different 572 * method of programming the transfer speed which 573 * doesn't require the control register, but it's 574 * mighty bogus as the chip still responds to the 575 * address for the control register. 576 */ 577 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 578 u_long ctlstart; 579 580 /* Find the control port, usually 0x3f7 */ 581 ctlstart = rman_get_start(fdc->res_ioport) + 582 fdc->port_off + 7; 583 584 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); 585 } 586 587 /* 588 * Now (finally!) allocate the control port. 589 */ 590 fdc->rid_ctl = 1; 591 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 592 &fdc->rid_ctl, 593 0ul, ~0ul, 1, RF_ACTIVE); 594 if (fdc->res_ctl == 0) { 595 device_printf(dev, 596 "cannot reserve control I/O port range\n"); 597 return ENXIO; 598 } 599 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 600 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 601 } 602 603 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 604 &fdc->rid_irq, 0ul, ~0ul, 1, 605 RF_ACTIVE); 606 if (fdc->res_irq == 0) { 607 device_printf(dev, "cannot reserve interrupt line\n"); 608 return ENXIO; 609 } 610 611 if ((fdc->flags & FDC_NODMA) == 0) { 612 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 613 &fdc->rid_drq, 0ul, ~0ul, 1, 614 RF_ACTIVE); 615 if (fdc->res_drq == 0) { 616 device_printf(dev, "cannot reserve DMA request line\n"); 617 return ENXIO; 618 } 619 fdc->dmachan = fdc->res_drq->r_start; 620 } 621 622 return 0; 623 } 624 625 void 626 fdc_release_resources(struct fdc_data *fdc) 627 { 628 device_t dev; 629 630 dev = fdc->fdc_dev; 631 if (fdc->res_irq != 0) { 632 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 633 fdc->res_irq); 634 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 635 fdc->res_irq); 636 } 637 if (fdc->res_ctl != 0) { 638 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 639 fdc->res_ctl); 640 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 641 fdc->res_ctl); 642 } 643 if (fdc->res_ioport != 0) { 644 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 645 fdc->res_ioport); 646 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 647 fdc->res_ioport); 648 } 649 if (fdc->res_drq != 0) { 650 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 651 fdc->res_drq); 652 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 653 fdc->res_drq); 654 } 655 } 656 657 /****************************************************************************/ 658 /* autoconfiguration stuff */ 659 /****************************************************************************/ 660 661 static struct isa_pnp_id fdc_ids[] = { 662 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 663 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 664 {0} 665 }; 666 667 int 668 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result) 669 { 670 struct fdc_ivars *ivars = device_get_ivars(child); 671 672 switch (which) { 673 case FDC_IVAR_FDUNIT: 674 *result = ivars->fdunit; 675 break; 676 default: 677 return ENOENT; 678 } 679 return 0; 680 } 681 682 /* 683 * fdc controller section. 684 */ 685 static int 686 fdc_probe(device_t dev) 687 { 688 int error, ic_type; 689 struct fdc_data *fdc; 690 691 fdc = device_get_softc(dev); 692 bzero(fdc, sizeof *fdc); 693 fdc->fdc_dev = dev; 694 fdc->fdctl_wr = fdctl_wr_isa; 695 696 /* Check pnp ids */ 697 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 698 if (error == ENXIO) 699 return ENXIO; 700 if (error == 0) 701 fdc->flags |= FDC_ISPNP; 702 703 /* Attempt to allocate our resources for the duration of the probe */ 704 error = fdc_alloc_resources(fdc); 705 if (error) 706 goto out; 707 708 /* First - lets reset the floppy controller */ 709 fdout_wr(fdc, 0); 710 DELAY(100); 711 fdout_wr(fdc, FDO_FRST); 712 713 /* see if it can handle a command */ 714 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 715 NE7_SPEC_2(2, 0), 0)) { 716 error = ENXIO; 717 goto out; 718 } 719 720 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 721 ic_type = (u_char)ic_type; 722 switch (ic_type) { 723 case 0x80: 724 device_set_desc(dev, "NEC 765 or clone"); 725 fdc->fdct = FDC_NE765; 726 break; 727 case 0x81: 728 device_set_desc(dev, "Intel 82077 or clone"); 729 fdc->fdct = FDC_I82077; 730 break; 731 case 0x90: 732 device_set_desc(dev, "NEC 72065B or clone"); 733 fdc->fdct = FDC_NE72065; 734 break; 735 default: 736 device_set_desc(dev, "generic floppy controller"); 737 fdc->fdct = FDC_UNKNOWN; 738 break; 739 } 740 } 741 742 out: 743 fdc_release_resources(fdc); 744 return (error); 745 } 746 747 /* 748 * Add a child device to the fdc controller. It will then be probed etc. 749 */ 750 static void 751 fdc_add_child(device_t dev, const char *name, int unit) 752 { 753 int disabled; 754 struct fdc_ivars *ivar; 755 device_t child; 756 757 ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO); 758 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 759 ivar->fdunit = 0; 760 child = device_add_child(dev, name, unit); 761 if (child == NULL) 762 return; 763 device_set_ivars(child, ivar); 764 if (resource_int_value(name, unit, "disabled", &disabled) == 0 765 && disabled != 0) 766 device_disable(child); 767 } 768 769 int 770 fdc_attach(device_t dev) 771 { 772 struct fdc_data *fdc; 773 int i, error; 774 775 fdc = device_get_softc(dev); 776 777 callout_init(&fdc->pseudointr_ch); 778 779 error = fdc_alloc_resources(fdc); 780 if (error) { 781 device_printf(dev, "cannot re-aquire resources\n"); 782 return error; 783 } 784 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 785 0, fdc_intr, fdc, 786 &fdc->fdc_intr, NULL); 787 if (error) { 788 device_printf(dev, "cannot setup interrupt\n"); 789 return error; 790 } 791 fdc->fdcu = device_get_unit(dev); 792 fdc->flags |= FDC_ATTACHED; 793 794 if ((fdc->flags & FDC_NODMA) == 0) { 795 /* Acquire the DMA channel forever, The driver will do the rest */ 796 /* XXX should integrate with rman */ 797 isa_dma_acquire(fdc->dmachan); 798 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */); 799 } 800 fdc->state = DEVIDLE; 801 802 /* reset controller, turn motor off, clear fdout mirror reg */ 803 fdout_wr(fdc, ((fdc->fdout = 0))); 804 bioq_init(&fdc->bio_queue); 805 806 /* 807 * Probe and attach any children. We should probably detect 808 * devices from the BIOS unless overridden. 809 */ 810 for (i = resource_query_string(-1, "at", device_get_nameunit(dev)); 811 i != -1; 812 i = resource_query_string(i, "at", device_get_nameunit(dev))) 813 fdc_add_child(dev, resource_query_name(i), 814 resource_query_unit(i)); 815 816 return (bus_generic_attach(dev)); 817 } 818 819 int 820 fdc_print_child(device_t me, device_t child) 821 { 822 int retval = 0; 823 824 retval += bus_print_child_header(me, child); 825 retval += kprintf(" on %s drive %d\n", device_get_nameunit(me), 826 fdc_get_fdunit(child)); 827 828 return (retval); 829 } 830 831 static device_method_t fdc_methods[] = { 832 /* Device interface */ 833 DEVMETHOD(device_probe, fdc_probe), 834 DEVMETHOD(device_attach, fdc_attach), 835 DEVMETHOD(device_detach, bus_generic_detach), 836 DEVMETHOD(device_shutdown, bus_generic_shutdown), 837 DEVMETHOD(device_suspend, bus_generic_suspend), 838 DEVMETHOD(device_resume, bus_generic_resume), 839 840 /* Bus interface */ 841 DEVMETHOD(bus_print_child, fdc_print_child), 842 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 843 /* Our children never use any other bus interface methods. */ 844 845 { 0, 0 } 846 }; 847 848 static driver_t fdc_driver = { 849 "fdc", 850 fdc_methods, 851 sizeof(struct fdc_data) 852 }; 853 854 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 855 856 /******************************************************************/ 857 /* 858 * devices attached to the controller section. 859 */ 860 static int 861 fd_probe(device_t dev) 862 { 863 int i; 864 u_int fdt, st0, st3; 865 struct fd_data *fd; 866 struct fdc_data *fdc; 867 fdsu_t fdsu; 868 static int fd_fifo = 0; 869 870 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 871 fd = device_get_softc(dev); 872 fdc = device_get_softc(device_get_parent(dev)); 873 874 bzero(fd, sizeof *fd); 875 fd->dev = dev; 876 fd->fdc = fdc; 877 fd->fdsu = fdsu; 878 fd->fdu = device_get_unit(dev); 879 880 #ifdef __i386__ 881 /* look up what bios thinks we have */ 882 switch (fd->fdu) { 883 case 0: 884 if ((fdc->flags & FDC_ISPCMCIA)) 885 fdt = RTCFDT_144M; 886 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0) 887 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED; 888 else 889 fdt = (rtcin(RTC_FDISKETTE) & 0xf0); 890 break; 891 case 1: 892 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0); 893 break; 894 default: 895 fdt = RTCFDT_NONE; 896 break; 897 } 898 #else 899 fdt = RTCFDT_144M; /* XXX probably */ 900 #endif 901 902 /* is there a unit? */ 903 if (fdt == RTCFDT_NONE) 904 return (ENXIO); 905 906 /* select it */ 907 set_motor(fdc, fdsu, TURNON); 908 DELAY(1000000); /* 1 sec */ 909 910 /* XXX This doesn't work before the first set_motor() */ 911 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN 912 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 913 && enable_fifo(fdc) == 0) { 914 device_printf(device_get_parent(dev), 915 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 916 } 917 fd_fifo = 1; 918 919 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) 920 && (st3 & NE7_ST3_T0)) { 921 /* if at track 0, first seek inwards */ 922 /* seek some steps: */ 923 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0); 924 DELAY(300000); /* ...wait a moment... */ 925 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */ 926 } 927 928 /* If we're at track 0 first seek inwards. */ 929 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) { 930 /* Seek some steps... */ 931 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 932 /* ...wait a moment... */ 933 DELAY(300000); 934 /* make ctrlr happy: */ 935 fd_sense_int(fdc, 0, 0); 936 } 937 } 938 939 for (i = 0; i < 2; i++) { 940 /* 941 * we must recalibrate twice, just in case the 942 * heads have been beyond cylinder 76, since most 943 * FDCs still barf when attempting to recalibrate 944 * more than 77 steps 945 */ 946 /* go back to 0: */ 947 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 948 /* a second being enough for full stroke seek*/ 949 DELAY(i == 0 ? 1000000 : 300000); 950 951 /* anything responding? */ 952 if (fd_sense_int(fdc, &st0, 0) == 0 && 953 (st0 & NE7_ST0_EC) == 0) 954 break; /* already probed succesfully */ 955 } 956 } 957 958 set_motor(fdc, fdsu, TURNOFF); 959 960 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */ 961 return (ENXIO); 962 963 fd->track = FD_NO_TRACK; 964 fd->fdc = fdc; 965 fd->fdsu = fdsu; 966 fd->options = 0; 967 callout_init(&fd->toffhandle); 968 callout_init(&fd->tohandle); 969 callout_init(&fd->motor); 970 971 switch (fdt) { 972 case RTCFDT_12M: 973 device_set_desc(dev, "1200-KB 5.25\" drive"); 974 fd->type = FD_1200; 975 break; 976 case RTCFDT_144M | RTCFDT_144M_PRETENDED: 977 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive"); 978 fdt = RTCFDT_144M; 979 fd->type = FD_1440; 980 case RTCFDT_144M: 981 device_set_desc(dev, "1440-KB 3.5\" drive"); 982 fd->type = FD_1440; 983 break; 984 case RTCFDT_288M: 985 case RTCFDT_288M_1: 986 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 987 fd->type = FD_1440; 988 break; 989 case RTCFDT_360K: 990 device_set_desc(dev, "360-KB 5.25\" drive"); 991 fd->type = FD_360; 992 break; 993 case RTCFDT_720K: 994 kprintf("720-KB 3.5\" drive"); 995 fd->type = FD_720; 996 break; 997 default: 998 return (ENXIO); 999 } 1000 return (0); 1001 } 1002 1003 static int 1004 fd_attach(device_t dev) 1005 { 1006 struct fd_data *fd; 1007 #if 0 1008 int i; 1009 int mynor; 1010 int typemynor; 1011 int typesize; 1012 #endif 1013 1014 fd = device_get_softc(dev); 1015 1016 dev_ops_add(&fd_ops, -1 << 6, fd->fdu << 6); 1017 make_dev(&fd_ops, (fd->fdu << 6), 1018 UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu); 1019 1020 #if 0 1021 /* Other make_dev() go here. */ 1022 #endif 1023 1024 /* 1025 * Export the drive to the devstat interface. 1026 */ 1027 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1028 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS, 1029 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1030 DEVSTAT_PRIORITY_FD); 1031 return (0); 1032 } 1033 1034 static int 1035 fd_detach(device_t dev) 1036 { 1037 struct fd_data *fd; 1038 1039 fd = device_get_softc(dev); 1040 callout_stop(&fd->toffhandle); 1041 callout_stop(&fd->motor); 1042 1043 return (0); 1044 } 1045 1046 static device_method_t fd_methods[] = { 1047 /* Device interface */ 1048 DEVMETHOD(device_probe, fd_probe), 1049 DEVMETHOD(device_attach, fd_attach), 1050 DEVMETHOD(device_detach, fd_detach), 1051 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1052 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1053 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1054 1055 { 0, 0 } 1056 }; 1057 1058 static driver_t fd_driver = { 1059 "fd", 1060 fd_methods, 1061 sizeof(struct fd_data) 1062 }; 1063 1064 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1065 1066 /****************************************************************************/ 1067 /* motor control stuff */ 1068 /* remember to not deselect the drive we're working on */ 1069 /****************************************************************************/ 1070 static void 1071 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1072 { 1073 int fdout = fdc->fdout; 1074 int needspecify = 0; 1075 1076 if(turnon) { 1077 fdout &= ~FDO_FDSEL; 1078 fdout |= (FDO_MOEN0 << fdsu) + fdsu; 1079 } else 1080 fdout &= ~(FDO_MOEN0 << fdsu); 1081 1082 if(!turnon 1083 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0) 1084 /* gonna turn off the last drive, put FDC to bed */ 1085 fdout &= ~ (FDO_FRST|FDO_FDMAEN); 1086 else { 1087 /* make sure controller is selected and specified */ 1088 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0) 1089 needspecify = 1; 1090 fdout |= (FDO_FRST|FDO_FDMAEN); 1091 } 1092 1093 fdout_wr(fdc, fdout); 1094 fdc->fdout = fdout; 1095 TRACE1("[0x%x->FDOUT]", fdout); 1096 1097 if (needspecify) { 1098 /* 1099 * XXX 1100 * special case: since we have just woken up the FDC 1101 * from its sleep, we silently assume the command will 1102 * be accepted, and do not test for a timeout 1103 */ 1104 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1105 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1106 0); 1107 if (fdc->flags & FDC_HAS_FIFO) 1108 (void) enable_fifo(fdc); 1109 } 1110 } 1111 1112 static void 1113 fd_turnoff(void *xfd) 1114 { 1115 fd_p fd = xfd; 1116 1117 TRACE1("[fd%d: turnoff]", fd->fdu); 1118 1119 crit_enter(); 1120 /* 1121 * Don't turn off the motor yet if the drive is active. 1122 * 1123 * If we got here, this could only mean we missed an interrupt. 1124 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1125 * after a controller reset. Just schedule a pseudo-interrupt 1126 * so the state machine gets re-entered. 1127 */ 1128 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1129 fdc_intr(fd->fdc); 1130 crit_exit(); 1131 return; 1132 } 1133 1134 fd->flags &= ~FD_MOTOR; 1135 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1136 crit_exit(); 1137 } 1138 1139 static void 1140 fd_motor_on(void *xfd) 1141 { 1142 fd_p fd = xfd; 1143 1144 crit_enter(); 1145 fd->flags &= ~FD_MOTOR_WAIT; 1146 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1147 { 1148 fdc_intr(fd->fdc); 1149 } 1150 crit_exit(); 1151 } 1152 1153 static void 1154 fd_turnon(fd_p fd) 1155 { 1156 if(!(fd->flags & FD_MOTOR)) 1157 { 1158 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1159 set_motor(fd->fdc, fd->fdsu, TURNON); 1160 callout_reset(&fd->motor, hz, fd_motor_on, fd); 1161 } 1162 } 1163 1164 static void 1165 fdc_reset(fdc_p fdc) 1166 { 1167 /* Try a reset, keep motor on */ 1168 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1169 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1170 DELAY(100); 1171 /* enable FDC, but defer interrupts a moment */ 1172 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1173 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1174 DELAY(100); 1175 fdout_wr(fdc, fdc->fdout); 1176 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1177 1178 /* XXX after a reset, silently believe the FDC will accept commands */ 1179 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1180 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1181 0); 1182 if (fdc->flags & FDC_HAS_FIFO) 1183 (void) enable_fifo(fdc); 1184 } 1185 1186 /****************************************************************************/ 1187 /* fdc in/out */ 1188 /****************************************************************************/ 1189 /* 1190 * FDC IO functions, take care of the main status register, timeout 1191 * in case the desired status bits are never set. 1192 * 1193 * These PIO loops initially start out with short delays between 1194 * each iteration in the expectation that the required condition 1195 * is usually met quickly, so it can be handled immediately. After 1196 * about 1 ms, stepping is increased to achieve a better timing 1197 * accuracy in the calls to DELAY(). 1198 */ 1199 static int 1200 fd_in(struct fdc_data *fdc, int *ptr) 1201 { 1202 int i, j, step; 1203 1204 for (j = 0, step = 1; 1205 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) && 1206 j < FDSTS_TIMEOUT; 1207 j += step) { 1208 if (i == NE7_RQM) 1209 return (fdc_err(fdc, "ready for output in input\n")); 1210 if (j == 1000) 1211 step = 1000; 1212 DELAY(step); 1213 } 1214 if (j >= FDSTS_TIMEOUT) 1215 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); 1216 #ifdef FDC_DEBUG 1217 i = fddata_rd(fdc); 1218 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1219 *ptr = i; 1220 return (0); 1221 #else /* !FDC_DEBUG */ 1222 i = fddata_rd(fdc); 1223 if (ptr) 1224 *ptr = i; 1225 return (0); 1226 #endif /* FDC_DEBUG */ 1227 } 1228 1229 static int 1230 out_fdc(struct fdc_data *fdc, int x) 1231 { 1232 int i, j, step; 1233 1234 for (j = 0, step = 1; 1235 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM && 1236 j < FDSTS_TIMEOUT; 1237 j += step) { 1238 if (i == (NE7_DIO|NE7_RQM)) 1239 return (fdc_err(fdc, "ready for input in output\n")); 1240 if (j == 1000) 1241 step = 1000; 1242 DELAY(step); 1243 } 1244 if (j >= FDSTS_TIMEOUT) 1245 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); 1246 1247 /* Send the command and return */ 1248 fddata_wr(fdc, x); 1249 TRACE1("[0x%x->FDDATA]", x); 1250 return (0); 1251 } 1252 1253 /****************************************************************************/ 1254 /* fdopen/fdclose */ 1255 /****************************************************************************/ 1256 int 1257 Fdopen(struct dev_open_args *ap) 1258 { 1259 cdev_t dev = ap->a_head.a_dev; 1260 fdu_t fdu = FDUNIT(minor(dev)); 1261 int type = FDTYPE(minor(dev)); 1262 fd_p fd; 1263 fdc_p fdc; 1264 1265 /* check bounds */ 1266 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1267 return (ENXIO); 1268 fdc = fd->fdc; 1269 if ((fdc == NULL) || (fd->type == NO_TYPE)) 1270 return (ENXIO); 1271 if (type > NUMDENS) 1272 return (ENXIO); 1273 if (type == 0) 1274 type = fd->type; 1275 else { 1276 /* 1277 * For each type of basic drive, make sure we are trying 1278 * to open a type it can do, 1279 */ 1280 if (type != fd->type) { 1281 switch (fd->type) { 1282 case FD_360: 1283 return (ENXIO); 1284 case FD_720: 1285 if ( type != FD_820 1286 && type != FD_800 1287 && type != FD_640 1288 ) 1289 return (ENXIO); 1290 break; 1291 case FD_1200: 1292 switch (type) { 1293 case FD_1480: 1294 type = FD_1480in5_25; 1295 break; 1296 case FD_1440: 1297 type = FD_1440in5_25; 1298 break; 1299 case FD_1232: 1300 break; 1301 case FD_820: 1302 type = FD_820in5_25; 1303 break; 1304 case FD_800: 1305 type = FD_800in5_25; 1306 break; 1307 case FD_720: 1308 type = FD_720in5_25; 1309 break; 1310 case FD_640: 1311 type = FD_640in5_25; 1312 break; 1313 case FD_360: 1314 type = FD_360in5_25; 1315 break; 1316 default: 1317 return(ENXIO); 1318 } 1319 break; 1320 case FD_1440: 1321 if ( type != FD_1720 1322 && type != FD_1480 1323 && type != FD_1200 1324 && type != FD_820 1325 && type != FD_800 1326 && type != FD_720 1327 && type != FD_640 1328 ) 1329 return(ENXIO); 1330 break; 1331 } 1332 } 1333 } 1334 fd->ft = fd_types + type - 1; 1335 fd->flags |= FD_OPEN; 1336 /* 1337 * Clearing the DMA overrun counter at open time is a bit messy. 1338 * Since we're only managing one counter per controller, opening 1339 * the second drive could mess it up. Anyway, if the DMA overrun 1340 * condition is really persistent, it will eventually time out 1341 * still. OTOH, clearing it here will ensure we'll at least start 1342 * trying again after a previous (maybe even long ago) failure. 1343 * Also, this is merely a stop-gap measure only that should not 1344 * happen during normal operation, so we can tolerate it to be a 1345 * bit sloppy about this. 1346 */ 1347 fdc->dma_overruns = 0; 1348 1349 return 0; 1350 } 1351 1352 int 1353 fdclose(struct dev_close_args *ap) 1354 { 1355 cdev_t dev = ap->a_head.a_dev; 1356 fdu_t fdu = FDUNIT(minor(dev)); 1357 struct fd_data *fd; 1358 1359 fd = devclass_get_softc(fd_devclass, fdu); 1360 fd->flags &= ~FD_OPEN; 1361 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG); 1362 1363 return (0); 1364 } 1365 1366 /****************************************************************************/ 1367 /* fdstrategy */ 1368 /****************************************************************************/ 1369 int 1370 fdstrategy(struct dev_strategy_args *ap) 1371 { 1372 cdev_t dev = ap->a_head.a_dev; 1373 struct bio *bio = ap->a_bio; 1374 struct buf *bp = bio->bio_buf; 1375 unsigned nblocks, blknum, cando; 1376 fdu_t fdu; 1377 fdc_p fdc; 1378 fd_p fd; 1379 size_t fdblk; 1380 1381 fdu = FDUNIT(minor(dev)); 1382 fd = devclass_get_softc(fd_devclass, fdu); 1383 if (fd == 0) 1384 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1385 (u_long)major(dev), (u_long)minor(dev)); 1386 fdc = fd->fdc; 1387 if (fd->type == NO_TYPE) { 1388 bp->b_error = ENXIO; 1389 bp->b_flags |= B_ERROR; 1390 goto bad; 1391 }; 1392 1393 fdblk = 128 << (fd->ft->secsize); 1394 if (bp->b_cmd != BUF_CMD_FORMAT) { 1395 if (bio->bio_offset < 0) { 1396 kprintf( 1397 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n", 1398 fdu, bio->bio_offset, bp->b_bcount); 1399 bp->b_error = EINVAL; 1400 bp->b_flags |= B_ERROR; 1401 goto bad; 1402 } 1403 if ((bp->b_bcount % fdblk) != 0) { 1404 bp->b_error = EINVAL; 1405 bp->b_flags |= B_ERROR; 1406 goto bad; 1407 } 1408 } 1409 1410 /* 1411 * Set up block calculations. 1412 */ 1413 if (bio->bio_offset > 20000000LL * fdblk) { 1414 /* 1415 * Reject unreasonably high block number, prevent the 1416 * multiplication below from overflowing. 1417 */ 1418 bp->b_error = EINVAL; 1419 bp->b_flags |= B_ERROR; 1420 goto bad; 1421 } 1422 blknum = (unsigned)(bio->bio_offset / fdblk); 1423 nblocks = fd->ft->size; 1424 bp->b_resid = 0; 1425 if (blknum + (bp->b_bcount / fdblk) > nblocks) { 1426 if (blknum <= nblocks) { 1427 cando = (nblocks - blknum) * fdblk; 1428 bp->b_resid = bp->b_bcount - cando; 1429 if (cando == 0) 1430 goto bad; /* not actually bad but EOF */ 1431 } else { 1432 bp->b_error = EINVAL; 1433 bp->b_flags |= B_ERROR; 1434 goto bad; 1435 } 1436 } 1437 crit_enter(); 1438 bio->bio_driver_info = dev; 1439 bioqdisksort(&fdc->bio_queue, bio); 1440 callout_stop(&fd->toffhandle); 1441 1442 /* Tell devstat we are starting on the transaction */ 1443 devstat_start_transaction(&fd->device_stats); 1444 device_busy(fd->dev); 1445 1446 fdstart(fdc); 1447 crit_exit(); 1448 return(0); 1449 1450 bad: 1451 biodone(bio); 1452 return(0); 1453 } 1454 1455 /***************************************************************\ 1456 * fdstart * 1457 * We have just queued something.. if the controller is not busy * 1458 * then simulate the case where it has just finished a command * 1459 * So that it (the interrupt routine) looks on the queue for more* 1460 * work to do and picks up what we just added. * 1461 * If the controller is already busy, we need do nothing, as it * 1462 * will pick up our work when the present work completes * 1463 \***************************************************************/ 1464 static void 1465 fdstart(struct fdc_data *fdc) 1466 { 1467 crit_enter(); 1468 if(fdc->state == DEVIDLE) 1469 { 1470 fdc_intr(fdc); 1471 } 1472 crit_exit(); 1473 } 1474 1475 static void 1476 fd_iotimeout(void *xfdc) 1477 { 1478 fdc_p fdc; 1479 1480 fdc = xfdc; 1481 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1482 1483 /* 1484 * Due to IBM's brain-dead design, the FDC has a faked ready 1485 * signal, hardwired to ready == true. Thus, any command 1486 * issued if there's no diskette in the drive will _never_ 1487 * complete, and must be aborted by resetting the FDC. 1488 * Many thanks, Big Blue! 1489 * The FDC must not be reset directly, since that would 1490 * interfere with the state machine. Instead, pretend that 1491 * the command completed but was invalid. The state machine 1492 * will reset the FDC and retry once. 1493 */ 1494 crit_enter(); 1495 fdc->status[0] = NE7_ST0_IC_IV; 1496 fdc->flags &= ~FDC_STAT_VALID; 1497 fdc->state = IOTIMEDOUT; 1498 fdc_intr(fdc); 1499 crit_exit(); 1500 } 1501 1502 /* just ensure it is running in a critical section */ 1503 static void 1504 fd_pseudointr(void *xfdc) 1505 { 1506 crit_enter(); 1507 fdc_intr(xfdc); 1508 crit_exit(); 1509 } 1510 1511 /***********************************************************************\ 1512 * fdintr * 1513 * keep calling the state machine until it returns a 0 * 1514 * ALWAYS called at SPLBIO * 1515 \***********************************************************************/ 1516 static void 1517 fdc_intr(void *xfdc) 1518 { 1519 fdc_p fdc = xfdc; 1520 while(fdstate(fdc)) 1521 ; 1522 } 1523 1524 /* 1525 * magic pseudo-DMA initialization for YE FDC. Sets count and 1526 * direction 1527 */ 1528 #define SET_BCDR(fdc,wr,cnt,port) \ 1529 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1530 ((cnt)-1) & 0xff); \ 1531 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1532 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1533 1534 /* 1535 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy 1536 */ 1537 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count) 1538 { 1539 u_char *cptr = (u_char *)addr; 1540 1541 if (cmd == BUF_CMD_READ) { 1542 if (fdc->state != PIOREAD) { 1543 fdc->state = PIOREAD; 1544 return(0); 1545 }; 1546 SET_BCDR(fdc, 0, count, 0); 1547 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1548 FDC_YE_DATAPORT, cptr, count); 1549 } else { 1550 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1551 FDC_YE_DATAPORT, cptr, count); 1552 SET_BCDR(fdc, 0, count, 0); 1553 }; 1554 return(1); 1555 } 1556 1557 /***********************************************************************\ 1558 * The controller state machine. * 1559 * if it returns a non zero value, it should be called again immediatly * 1560 \***********************************************************************/ 1561 static int 1562 fdstate(fdc_p fdc) 1563 { 1564 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3; 1565 unsigned blknum = 0, b_cylinder = 0; 1566 fdu_t fdu = fdc->fdu; 1567 fd_p fd; 1568 struct bio *bio; 1569 struct buf *bp; 1570 struct fd_formb *finfo = NULL; 1571 size_t fdblk; 1572 cdev_t dev; 1573 1574 bio = fdc->bio; 1575 if (bio == NULL) { 1576 bio = bioq_first(&fdc->bio_queue); 1577 if (bio != NULL) { 1578 bioq_remove(&fdc->bio_queue, bio); 1579 fdc->bio = bio; 1580 } 1581 } 1582 if (bio == NULL) { 1583 /***********************************************\ 1584 * nothing left for this controller to do * 1585 * Force into the IDLE state, * 1586 \***********************************************/ 1587 fdc->state = DEVIDLE; 1588 if (fdc->fd) { 1589 device_printf(fdc->fdc_dev, 1590 "unexpected valid fd pointer\n"); 1591 fdc->fd = (fd_p) 0; 1592 fdc->fdu = -1; 1593 } 1594 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1595 return (0); 1596 } 1597 bp = bio->bio_buf; 1598 dev = bio->bio_driver_info; 1599 1600 fdu = FDUNIT(minor(dev)); 1601 fd = devclass_get_softc(fd_devclass, fdu); 1602 fdblk = 128 << fd->ft->secsize; 1603 if (fdc->fd && (fd != fdc->fd)) 1604 device_printf(fd->dev, "confused fd pointers\n"); 1605 read = (bp->b_cmd == BUF_CMD_READ); 1606 format = (bp->b_cmd == BUF_CMD_FORMAT); 1607 if (format) { 1608 finfo = (struct fd_formb *)bp->b_data; 1609 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 1610 - (char *)finfo; 1611 } 1612 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) { 1613 blknum = (unsigned)(bio->bio_offset / fdblk) + 1614 fd->skip /fdblk; 1615 b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 1616 } 1617 TRACE1("fd%d", fdu); 1618 TRACE1("[%s]", fdstates[fdc->state]); 1619 TRACE1("(0x%x)", fd->flags); 1620 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd); 1621 switch (fdc->state) 1622 { 1623 case DEVIDLE: 1624 case FINDWORK: /* we have found new work */ 1625 fdc->retry = 0; 1626 fd->skip = 0; 1627 fdc->fd = fd; 1628 fdc->fdu = fdu; 1629 fdc->fdctl_wr(fdc, fd->ft->trans); 1630 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 1631 /*******************************************************\ 1632 * If the next drive has a motor startup pending, then * 1633 * it will start up in its own good time * 1634 \*******************************************************/ 1635 if(fd->flags & FD_MOTOR_WAIT) { 1636 fdc->state = MOTORWAIT; 1637 return (0); /* come back later */ 1638 } 1639 /*******************************************************\ 1640 * Maybe if it's not starting, it SHOULD be starting * 1641 \*******************************************************/ 1642 if (!(fd->flags & FD_MOTOR)) 1643 { 1644 fdc->state = MOTORWAIT; 1645 fd_turnon(fd); 1646 return (0); 1647 } 1648 else /* at least make sure we are selected */ 1649 { 1650 set_motor(fdc, fd->fdsu, TURNON); 1651 } 1652 if (fdc->flags & FDC_NEEDS_RESET) { 1653 fdc->state = RESETCTLR; 1654 fdc->flags &= ~FDC_NEEDS_RESET; 1655 } else 1656 fdc->state = DOSEEK; 1657 break; 1658 case DOSEEK: 1659 if (b_cylinder == (unsigned)fd->track) 1660 { 1661 fdc->state = SEEKCOMPLETE; 1662 break; 1663 } 1664 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 1665 fd->fdsu, b_cylinder * fd->ft->steptrac, 1666 0)) 1667 { 1668 /* 1669 * seek command not accepted, looks like 1670 * the FDC went off to the Saints... 1671 */ 1672 fdc->retry = 6; /* try a reset */ 1673 return(retrier(fdc)); 1674 } 1675 fd->track = FD_NO_TRACK; 1676 fdc->state = SEEKWAIT; 1677 return(0); /* will return later */ 1678 case SEEKWAIT: 1679 /* allow heads to settle */ 1680 callout_reset(&fdc->pseudointr_ch, hz / 16, 1681 fd_pseudointr, fdc); 1682 fdc->state = SEEKCOMPLETE; 1683 return(0); /* will return later */ 1684 case SEEKCOMPLETE : /* SEEK DONE, START DMA */ 1685 /* Make sure seek really happened*/ 1686 if(fd->track == FD_NO_TRACK) { 1687 int descyl = b_cylinder * fd->ft->steptrac; 1688 do { 1689 /* 1690 * This might be a "ready changed" interrupt, 1691 * which cannot really happen since the 1692 * RDY pin is hardwired to + 5 volts. This 1693 * generally indicates a "bouncing" intr 1694 * line, so do one of the following: 1695 * 1696 * When running on an enhanced FDC that is 1697 * known to not go stuck after responding 1698 * with INVALID, fetch all interrupt states 1699 * until seeing either an INVALID or a 1700 * real interrupt condition. 1701 * 1702 * When running on a dumb old NE765, give 1703 * up immediately. The controller will 1704 * provide up to four dummy RC interrupt 1705 * conditions right after reset (for the 1706 * corresponding four drives), so this is 1707 * our only chance to get notice that it 1708 * was not the FDC that caused the interrupt. 1709 */ 1710 if (fd_sense_int(fdc, &st0, &cyl) 1711 == FD_NOT_VALID) 1712 return 0; 1713 if(fdc->fdct == FDC_NE765 1714 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1715 return 0; /* hope for a real intr */ 1716 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1717 1718 if (0 == descyl) { 1719 int failed = 0; 1720 /* 1721 * seek to cyl 0 requested; make sure we are 1722 * really there 1723 */ 1724 if (fd_sense_drive_status(fdc, &st3)) 1725 failed = 1; 1726 if ((st3 & NE7_ST3_T0) == 0) { 1727 kprintf( 1728 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 1729 fdu, st3, NE7_ST3BITS); 1730 failed = 1; 1731 } 1732 1733 if (failed) { 1734 if(fdc->retry < 3) 1735 fdc->retry = 3; 1736 return (retrier(fdc)); 1737 } 1738 } 1739 1740 if (cyl != descyl) { 1741 kprintf( 1742 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 1743 fdu, descyl, cyl, st0); 1744 if (fdc->retry < 3) 1745 fdc->retry = 3; 1746 return (retrier(fdc)); 1747 } 1748 } 1749 1750 fd->track = b_cylinder; 1751 if (!(fdc->flags & FDC_NODMA)) { 1752 isa_dmastart(isa_dmabp(bp), 1753 bp->b_data+fd->skip, 1754 format ? bp->b_bcount : fdblk, fdc->dmachan); 1755 } 1756 sectrac = fd->ft->sectrac; 1757 sec = blknum % (sectrac * fd->ft->heads); 1758 head = sec / sectrac; 1759 sec = sec % sectrac + 1; 1760 fd->hddrv = ((head&1)<<2)+fdu; 1761 1762 if(format || !read) 1763 { 1764 /* make sure the drive is writable */ 1765 if(fd_sense_drive_status(fdc, &st3) != 0) 1766 { 1767 /* stuck controller? */ 1768 if (!(fdc->flags & FDC_NODMA)) 1769 isa_dmadone(isa_dmabp(bp), 1770 bp->b_data + fd->skip, 1771 format ? bp->b_bcount : fdblk, 1772 fdc->dmachan); 1773 fdc->retry = 6; /* reset the beast */ 1774 return (retrier(fdc)); 1775 } 1776 if(st3 & NE7_ST3_WP) 1777 { 1778 /* 1779 * XXX YES! this is ugly. 1780 * in order to force the current operation 1781 * to fail, we will have to fake an FDC 1782 * error - all error handling is done 1783 * by the retrier() 1784 */ 1785 fdc->status[0] = NE7_ST0_IC_AT; 1786 fdc->status[1] = NE7_ST1_NW; 1787 fdc->status[2] = 0; 1788 fdc->status[3] = fd->track; 1789 fdc->status[4] = head; 1790 fdc->status[5] = sec; 1791 fdc->retry = 8; /* break out immediately */ 1792 fdc->state = IOTIMEDOUT; /* not really... */ 1793 return (1); 1794 } 1795 } 1796 1797 if (format) { 1798 if (fdc->flags & FDC_NODMA) { 1799 /* 1800 * This seems to be necessary for 1801 * whatever obscure reason; if we omit 1802 * it, we end up filling the sector ID 1803 * fields of the newly formatted track 1804 * entirely with garbage, causing 1805 * `wrong cylinder' errors all over 1806 * the place when trying to read them 1807 * back. 1808 * 1809 * Umpf. 1810 */ 1811 SET_BCDR(fdc, 1, bp->b_bcount, 0); 1812 1813 (void)fdcpio(fdc,bp->b_cmd, 1814 bp->b_data+fd->skip, 1815 bp->b_bcount); 1816 1817 } 1818 /* formatting */ 1819 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu, 1820 finfo->fd_formb_secshift, 1821 finfo->fd_formb_nsecs, 1822 finfo->fd_formb_gaplen, 1823 finfo->fd_formb_fillbyte, 0)) { 1824 /* controller fell over */ 1825 if (!(fdc->flags & FDC_NODMA)) 1826 isa_dmadone(isa_dmabp(bp), 1827 bp->b_data + fd->skip, 1828 format ? bp->b_bcount : fdblk, 1829 fdc->dmachan); 1830 fdc->retry = 6; 1831 return (retrier(fdc)); 1832 } 1833 } else { 1834 if (fdc->flags & FDC_NODMA) { 1835 /* 1836 * this seems to be necessary even when 1837 * reading data 1838 */ 1839 SET_BCDR(fdc, 1, fdblk, 0); 1840 1841 /* 1842 * perform the write pseudo-DMA before 1843 * the WRITE command is sent 1844 */ 1845 if (!read) 1846 (void)fdcpio(fdc,bp->b_cmd, 1847 bp->b_data+fd->skip, 1848 fdblk); 1849 } 1850 if (fd_cmd(fdc, 9, 1851 (read ? NE7CMD_READ : NE7CMD_WRITE), 1852 head << 2 | fdu, /* head & unit */ 1853 fd->track, /* track */ 1854 head, 1855 sec, /* sector + 1 */ 1856 fd->ft->secsize, /* sector size */ 1857 sectrac, /* sectors/track */ 1858 fd->ft->gap, /* gap size */ 1859 fd->ft->datalen, /* data length */ 1860 0)) { 1861 /* the beast is sleeping again */ 1862 if (!(fdc->flags & FDC_NODMA)) 1863 isa_dmadone(isa_dmabp(bp), 1864 bp->b_data + fd->skip, 1865 format ? bp->b_bcount : fdblk, 1866 fdc->dmachan); 1867 fdc->retry = 6; 1868 return (retrier(fdc)); 1869 } 1870 } 1871 if (fdc->flags & FDC_NODMA) 1872 /* 1873 * if this is a read, then simply await interrupt 1874 * before performing PIO 1875 */ 1876 if (read && !fdcpio(fdc,bp->b_cmd, 1877 bp->b_data+fd->skip,fdblk)) { 1878 callout_reset(&fd->tohandle, hz, 1879 fd_iotimeout, fdc); 1880 return(0); /* will return later */ 1881 }; 1882 1883 /* 1884 * write (or format) operation will fall through and 1885 * await completion interrupt 1886 */ 1887 fdc->state = IOCOMPLETE; 1888 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc); 1889 return (0); /* will return later */ 1890 case PIOREAD: 1891 /* 1892 * actually perform the PIO read. The IOCOMPLETE case 1893 * removes the timeout for us. 1894 */ 1895 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk); 1896 fdc->state = IOCOMPLETE; 1897 /* FALLTHROUGH */ 1898 case IOCOMPLETE: /* IO DONE, post-analyze */ 1899 callout_stop(&fd->tohandle); 1900 1901 if (fd_read_status(fdc, fd->fdsu)) { 1902 if (!(fdc->flags & FDC_NODMA)) { 1903 isa_dmadone(isa_dmabp(bp), 1904 bp->b_data + fd->skip, 1905 format ? bp->b_bcount : fdblk, 1906 fdc->dmachan); 1907 } 1908 if (fdc->retry < 6) 1909 fdc->retry = 6; /* force a reset */ 1910 return (retrier(fdc)); 1911 } 1912 1913 fdc->state = IOTIMEDOUT; 1914 1915 /* FALLTHROUGH */ 1916 1917 case IOTIMEDOUT: 1918 if (!(fdc->flags & FDC_NODMA)) { 1919 isa_dmadone(isa_dmabp(bp), 1920 bp->b_data + fd->skip, 1921 format ? bp->b_bcount : fdblk, fdc->dmachan); 1922 } 1923 if (fdc->status[0] & NE7_ST0_IC) { 1924 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1925 && fdc->status[1] & NE7_ST1_OR) { 1926 /* 1927 * DMA overrun. Someone hogged the bus and 1928 * didn't release it in time for the next 1929 * FDC transfer. 1930 * 1931 * We normally restart this without bumping 1932 * the retry counter. However, in case 1933 * something is seriously messed up (like 1934 * broken hardware), we rather limit the 1935 * number of retries so the IO operation 1936 * doesn't block indefinately. 1937 */ 1938 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 1939 fdc->state = SEEKCOMPLETE; 1940 return (1); 1941 } /* else fall through */ 1942 } 1943 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 1944 && fdc->retry < 6) 1945 fdc->retry = 6; /* force a reset */ 1946 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 1947 && fdc->status[2] & NE7_ST2_WC 1948 && fdc->retry < 3) 1949 fdc->retry = 3; /* force recalibrate */ 1950 return (retrier(fdc)); 1951 } 1952 /* All OK */ 1953 /* Operation successful, retry DMA overruns again next time. */ 1954 fdc->dma_overruns = 0; 1955 fd->skip += fdblk; 1956 if (!format && fd->skip < bp->b_bcount - bp->b_resid) { 1957 /* set up next transfer */ 1958 fdc->state = DOSEEK; 1959 } else { 1960 /* ALL DONE */ 1961 fd->skip = 0; 1962 fdc->bio = NULL; 1963 device_unbusy(fd->dev); 1964 devstat_end_transaction_buf(&fd->device_stats, bp); 1965 biodone(bio); 1966 fdc->fd = (fd_p) 0; 1967 fdc->fdu = -1; 1968 fdc->state = FINDWORK; 1969 } 1970 return (1); 1971 case RESETCTLR: 1972 fdc_reset(fdc); 1973 fdc->retry++; 1974 fdc->state = RESETCOMPLETE; 1975 return (0); 1976 case RESETCOMPLETE: 1977 /* 1978 * Discard all the results from the reset so that they 1979 * can't cause an unexpected interrupt later. 1980 */ 1981 for (i = 0; i < 4; i++) 1982 (void)fd_sense_int(fdc, &st0, &cyl); 1983 fdc->state = STARTRECAL; 1984 /* Fall through. */ 1985 case STARTRECAL: 1986 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 1987 /* arrgl */ 1988 fdc->retry = 6; 1989 return (retrier(fdc)); 1990 } 1991 fdc->state = RECALWAIT; 1992 return (0); /* will return later */ 1993 case RECALWAIT: 1994 /* allow heads to settle */ 1995 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc); 1996 fdc->state = RECALCOMPLETE; 1997 return (0); /* will return later */ 1998 case RECALCOMPLETE: 1999 do { 2000 /* 2001 * See SEEKCOMPLETE for a comment on this: 2002 */ 2003 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2004 return 0; 2005 if(fdc->fdct == FDC_NE765 2006 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2007 return 0; /* hope for a real intr */ 2008 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2009 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2010 { 2011 if(fdc->retry > 3) 2012 /* 2013 * a recalibrate from beyond cylinder 77 2014 * will "fail" due to the FDC limitations; 2015 * since people used to complain much about 2016 * the failure message, try not logging 2017 * this one if it seems to be the first 2018 * time in a line 2019 */ 2020 kprintf("fd%d: recal failed ST0 %b cyl %d\n", 2021 fdu, st0, NE7_ST0BITS, cyl); 2022 if(fdc->retry < 3) fdc->retry = 3; 2023 return (retrier(fdc)); 2024 } 2025 fd->track = 0; 2026 /* Seek (probably) necessary */ 2027 fdc->state = DOSEEK; 2028 return (1); /* will return immediatly */ 2029 case MOTORWAIT: 2030 if(fd->flags & FD_MOTOR_WAIT) 2031 { 2032 return (0); /* time's not up yet */ 2033 } 2034 if (fdc->flags & FDC_NEEDS_RESET) { 2035 fdc->state = RESETCTLR; 2036 fdc->flags &= ~FDC_NEEDS_RESET; 2037 } else { 2038 /* 2039 * If all motors were off, then the controller was 2040 * reset, so it has lost track of the current 2041 * cylinder. Recalibrate to handle this case. 2042 * But first, discard the results of the reset. 2043 */ 2044 fdc->state = RESETCOMPLETE; 2045 } 2046 return (1); /* will return immediatly */ 2047 default: 2048 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2049 if (fd_read_status(fdc, fd->fdsu) == 0) 2050 kprintf("FDC status :%x %x %x %x %x %x %x ", 2051 fdc->status[0], 2052 fdc->status[1], 2053 fdc->status[2], 2054 fdc->status[3], 2055 fdc->status[4], 2056 fdc->status[5], 2057 fdc->status[6] ); 2058 else 2059 kprintf("No status available "); 2060 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2061 { 2062 kprintf("[controller is dead now]\n"); 2063 return (0); 2064 } 2065 kprintf("ST0 = %x, PCN = %x\n", st0, cyl); 2066 return (0); 2067 } 2068 /*XXX confusing: some branches return immediately, others end up here*/ 2069 return (1); /* Come back immediatly to new state */ 2070 } 2071 2072 static int 2073 retrier(struct fdc_data *fdc) 2074 { 2075 struct bio *bio; 2076 struct buf *bp; 2077 struct fd_data *fd; 2078 cdev_t dev; 2079 int fdu; 2080 2081 bio = fdc->bio; 2082 bp = bio->bio_buf; 2083 dev = bio->bio_driver_info; 2084 2085 /* XXX shouldn't this be cached somewhere? */ 2086 fdu = FDUNIT(minor(dev)); 2087 fd = devclass_get_softc(fd_devclass, fdu); 2088 if (fd->options & FDOPT_NORETRY) 2089 goto fail; 2090 2091 switch (fdc->retry) { 2092 case 0: case 1: case 2: 2093 fdc->state = SEEKCOMPLETE; 2094 break; 2095 case 3: case 4: case 5: 2096 fdc->state = STARTRECAL; 2097 break; 2098 case 6: 2099 fdc->state = RESETCTLR; 2100 break; 2101 case 7: 2102 break; 2103 default: 2104 fail: 2105 { 2106 int printerror = (fd->options & FDOPT_NOERRLOG) == 0; 2107 2108 if (printerror) { 2109 /* 2110 * note: use the correct device for more 2111 * verbose error reporting. 2112 */ 2113 cdev_t subdev; 2114 2115 subdev = make_sub_dev(dev, 2116 (FDUNIT(minor(dev))<<3)|RAW_PART); 2117 diskerr(bio, subdev, 2118 "hard error", LOG_PRINTF, 2119 fdc->fd->skip, NULL); 2120 } 2121 if (printerror) { 2122 if (fdc->flags & FDC_STAT_VALID) 2123 kprintf( 2124 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2125 fdc->status[0], NE7_ST0BITS, 2126 fdc->status[1], NE7_ST1BITS, 2127 fdc->status[2], NE7_ST2BITS, 2128 fdc->status[3], fdc->status[4], 2129 fdc->status[5]); 2130 else 2131 kprintf(" (No status)\n"); 2132 } 2133 } 2134 bp->b_flags |= B_ERROR; 2135 bp->b_error = EIO; 2136 bp->b_resid += bp->b_bcount - fdc->fd->skip; 2137 fdc->bio = NULL; 2138 fdc->fd->skip = 0; 2139 device_unbusy(fd->dev); 2140 devstat_end_transaction_buf(&fdc->fd->device_stats, bp); 2141 biodone(bio); 2142 fdc->state = FINDWORK; 2143 fdc->flags |= FDC_NEEDS_RESET; 2144 fdc->fd = (fd_p) 0; 2145 fdc->fdu = -1; 2146 return (1); 2147 } 2148 fdc->retry++; 2149 return (1); 2150 } 2151 2152 static void 2153 fdformat_wakeup(struct bio *bio) 2154 { 2155 bio->bio_buf->b_cmd = BUF_CMD_DONE; 2156 wakeup(bio); 2157 } 2158 2159 static int 2160 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred) 2161 { 2162 fdu_t fdu; 2163 fd_p fd; 2164 struct buf *bp; 2165 int rv = 0; 2166 size_t fdblk; 2167 2168 fdu = FDUNIT(minor(dev)); 2169 fd = devclass_get_softc(fd_devclass, fdu); 2170 fdblk = 128 << fd->ft->secsize; 2171 2172 /* set up a buffer header for fdstrategy() */ 2173 bp = getpbuf(NULL); 2174 bp->b_cmd = BUF_CMD_FORMAT; 2175 2176 /* 2177 * calculate a fake blkno, so fdstrategy() would initiate a 2178 * seek to the requested cylinder 2179 */ 2180 bp->b_bio1.bio_offset = (off_t)(finfo->cyl * 2181 (fd->ft->sectrac * fd->ft->heads) 2182 + finfo->head * fd->ft->sectrac) * fdblk; 2183 bp->b_bio1.bio_driver_info = dev; 2184 bp->b_bio1.bio_done = fdformat_wakeup; 2185 2186 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; 2187 bp->b_data = (caddr_t)finfo; 2188 2189 /* now do the format */ 2190 dev_dstrategy(dev, &bp->b_bio1); 2191 2192 /* ...and wait for it to complete */ 2193 crit_enter(); 2194 while (bp->b_cmd != BUF_CMD_DONE) { 2195 rv = tsleep(&bp->b_bio1, 0, "fdform", 20 * hz); 2196 if (rv == EWOULDBLOCK) 2197 break; 2198 } 2199 crit_exit(); 2200 2201 if (rv == EWOULDBLOCK) { 2202 /* timed out */ 2203 rv = EIO; 2204 device_unbusy(fd->dev); 2205 biodone(&bp->b_bio1); 2206 } 2207 if (bp->b_flags & B_ERROR) 2208 rv = bp->b_error; 2209 /* 2210 * allow the process to be swapped 2211 */ 2212 relpbuf(bp, NULL); 2213 return rv; 2214 } 2215 2216 /* 2217 * TODO: don't allocate buffer on stack. 2218 */ 2219 2220 static int 2221 fdioctl(struct dev_ioctl_args *ap) 2222 { 2223 cdev_t dev = ap->a_head.a_dev; 2224 fdu_t fdu = FDUNIT(minor(dev)); 2225 fd_p fd = devclass_get_softc(fd_devclass, fdu); 2226 size_t fdblk; 2227 2228 struct fd_type *fdt; 2229 struct disklabel *dl; 2230 struct fdc_status *fsp; 2231 char buffer[DEV_BSIZE]; 2232 int error = 0; 2233 2234 fdblk = 128 << fd->ft->secsize; 2235 2236 switch (ap->a_cmd) { 2237 case DIOCGDINFO: 2238 bzero(buffer, sizeof (buffer)); 2239 dl = (struct disklabel *)buffer; 2240 dl->d_secsize = fdblk; 2241 fdt = fd->ft; 2242 dl->d_secpercyl = fdt->size / fdt->tracks; 2243 dl->d_type = DTYPE_FLOPPY; 2244 2245 if (readdisklabel(dev, dl) 2246 == NULL) 2247 error = 0; 2248 else 2249 error = EINVAL; 2250 2251 *(struct disklabel *)ap->a_data = *dl; 2252 break; 2253 2254 case DIOCSDINFO: 2255 if ((ap->a_fflag & FWRITE) == 0) 2256 error = EBADF; 2257 break; 2258 2259 case DIOCWLABEL: 2260 if ((ap->a_fflag & FWRITE) == 0) 2261 error = EBADF; 2262 break; 2263 2264 case DIOCWDINFO: 2265 if ((ap->a_fflag & FWRITE) == 0) { 2266 error = EBADF; 2267 break; 2268 } 2269 2270 dl = (struct disklabel *)ap->a_data; 2271 2272 if ((error = setdisklabel((struct disklabel *)buffer, dl, 2273 (u_long)0)) != 0) 2274 break; 2275 2276 error = writedisklabel(dev, (struct disklabel *)buffer); 2277 break; 2278 case FD_FORM: 2279 if ((ap->a_fflag & FWRITE) == 0) 2280 error = EBADF; /* must be opened for writing */ 2281 else if (((struct fd_formb *)ap->a_data)->format_version != 2282 FD_FORMAT_VERSION) 2283 error = EINVAL; /* wrong version of formatting prog */ 2284 else 2285 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred); 2286 break; 2287 2288 case FD_GTYPE: /* get drive type */ 2289 *(struct fd_type *)ap->a_data = *fd->ft; 2290 break; 2291 2292 case FD_STYPE: /* set drive type */ 2293 /* this is considered harmful; only allow for superuser */ 2294 if (suser_cred(ap->a_cred, 0) != 0) 2295 return EPERM; 2296 *fd->ft = *(struct fd_type *)ap->a_data; 2297 break; 2298 2299 case FD_GOPTS: /* get drive options */ 2300 *(int *)ap->a_data = fd->options; 2301 break; 2302 2303 case FD_SOPTS: /* set drive options */ 2304 fd->options = *(int *)ap->a_data; 2305 break; 2306 2307 case FD_GSTAT: 2308 fsp = (struct fdc_status *)ap->a_data; 2309 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2310 return EINVAL; 2311 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2312 break; 2313 2314 default: 2315 error = ENOTTY; 2316 break; 2317 } 2318 return (error); 2319 } 2320 2321 /* 2322 * Hello emacs, these are the 2323 * Local Variables: 2324 * c-indent-level: 8 2325 * c-continued-statement-offset: 8 2326 * c-continued-brace-offset: 0 2327 * c-brace-offset: -8 2328 * c-brace-imaginary-offset: 0 2329 * c-argdecl-indent: 8 2330 * c-label-offset: -8 2331 * c++-hanging-braces: 1 2332 * c++-access-specifier-offset: -8 2333 * c++-empty-arglist-indent: 8 2334 * c++-friend-offset: 0 2335 * End: 2336 */ 2337