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 * 55 */ 56 57 #include "opt_fdc.h" 58 59 #include <sys/param.h> 60 #include <sys/systm.h> 61 #include <sys/kernel.h> 62 #include <sys/buf.h> 63 #include <sys/bus.h> 64 #include <sys/conf.h> 65 #include <sys/diskslice.h> 66 #include <sys/disk.h> 67 #include <sys/devicestat.h> 68 #include <sys/fcntl.h> 69 #include <sys/malloc.h> 70 #include <sys/module.h> 71 #include <sys/proc.h> 72 #include <sys/priv.h> 73 #include <sys/syslog.h> 74 #include <sys/device.h> 75 #include <sys/rman.h> 76 #include <sys/buf2.h> 77 #include <sys/thread2.h> 78 79 #include <machine/clock.h> 80 #include <machine/inttypes.h> 81 #include <machine/ioctl_fd.h> 82 #include <machine/stdarg.h> 83 84 #include <bus/isa/isavar.h> 85 #include <bus/isa/isareg.h> 86 #include "fdreg.h" 87 #include "fdc.h" 88 #include <bus/isa/rtc.h> 89 90 /* configuration flags */ 91 #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */ 92 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ 93 94 /* internally used only, not really from CMOS: */ 95 #define RTCFDT_144M_PRETENDED 0x1000 96 97 /* error returns for fd_cmd() */ 98 #define FD_FAILED -1 99 #define FD_NOT_VALID -2 100 #define FDC_ERRMAX 100 /* do not log more */ 101 /* 102 * Stop retrying after this many DMA overruns. Since each retry takes 103 * one revolution, with 300 rpm., 25 retries take approximately 10 104 * seconds which the read attempt will block in case the DMA overrun 105 * is persistent. 106 */ 107 #define FDC_DMAOV_MAX 25 108 109 /* 110 * Timeout value for the PIO loops to wait until the FDC main status 111 * register matches our expectations (request for master, direction 112 * bit). This is supposed to be a number of microseconds, although 113 * timing might actually not be very accurate. 114 * 115 * Timeouts of 100 msec are believed to be required for some broken 116 * (old) hardware. 117 */ 118 #define FDSTS_TIMEOUT 100000 119 120 #define NUMTYPES 17 121 #define NUMDENS (NUMTYPES - 7) 122 123 /* These defines (-1) must match index for fd_types */ 124 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */ 125 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */ 126 #define FD_1720 1 127 #define FD_1480 2 128 #define FD_1440 3 129 #define FD_1200 4 130 #define FD_820 5 131 #define FD_800 6 132 #define FD_720 7 133 #define FD_360 8 134 #define FD_640 9 135 #define FD_1232 10 136 137 #define FD_1480in5_25 11 138 #define FD_1440in5_25 12 139 #define FD_820in5_25 13 140 #define FD_800in5_25 14 141 #define FD_720in5_25 15 142 #define FD_360in5_25 16 143 #define FD_640in5_25 17 144 145 146 static struct fd_type fd_types[NUMTYPES] = 147 { 148 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */ 149 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */ 150 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */ 151 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */ 152 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */ 153 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */ 154 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */ 155 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */ 156 { 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */ 157 { 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */ 158 159 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */ 160 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */ 161 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */ 162 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */ 163 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */ 164 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */ 165 { 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */ 166 }; 167 168 #define DRVS_PER_CTLR 2 /* 2 floppies */ 169 170 /***********************************************************************\ 171 * Per controller structure. * 172 \***********************************************************************/ 173 devclass_t fdc_devclass; 174 175 /***********************************************************************\ 176 * Per drive structure. * 177 * N per controller (DRVS_PER_CTLR) * 178 \***********************************************************************/ 179 struct fd_data { 180 struct fdc_data *fdc; /* pointer to controller structure */ 181 int fdsu; /* this units number on this controller */ 182 int type; /* Drive type (FD_1440...) */ 183 struct fd_type ft; /* the type descriptor */ 184 int flags; 185 #define FD_OPEN 0x01 /* it's open */ 186 #define FD_ACTIVE 0x02 /* it's active */ 187 #define FD_MOTOR 0x04 /* motor should be on */ 188 #define FD_MOTOR_WAIT 0x08 /* motor coming up */ 189 int skip; 190 int hddrv; 191 #define FD_NO_TRACK -2 192 int track; /* where we think the head is */ 193 int options; /* user configurable options, see ioctl_fd.h */ 194 struct callout toffhandle; 195 struct callout tohandle; 196 struct callout motor; 197 struct disk disk; 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", 0, 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 -1); 586 } 587 588 /* 589 * Now (finally!) allocate the control port. 590 */ 591 fdc->rid_ctl = 1; 592 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 593 &fdc->rid_ctl, 594 0ul, ~0ul, 1, RF_ACTIVE); 595 if (fdc->res_ctl == 0) { 596 device_printf(dev, 597 "cannot reserve control I/O port range\n"); 598 return ENXIO; 599 } 600 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 601 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 602 } 603 604 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 605 &fdc->rid_irq, 0ul, ~0ul, 1, 606 RF_ACTIVE); 607 if (fdc->res_irq == 0) { 608 device_printf(dev, "cannot reserve interrupt line\n"); 609 return ENXIO; 610 } 611 612 if ((fdc->flags & FDC_NODMA) == 0) { 613 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 614 &fdc->rid_drq, 0ul, ~0ul, 1, 615 RF_ACTIVE); 616 if (fdc->res_drq == 0) { 617 device_printf(dev, "cannot reserve DMA request line\n"); 618 return ENXIO; 619 } 620 fdc->dmachan = fdc->res_drq->r_start; 621 } 622 623 return 0; 624 } 625 626 void 627 fdc_release_resources(struct fdc_data *fdc) 628 { 629 device_t dev; 630 631 dev = fdc->fdc_dev; 632 if (fdc->res_irq != 0) { 633 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 634 fdc->res_irq); 635 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 636 fdc->res_irq); 637 } 638 if (fdc->res_ctl != 0) { 639 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 640 fdc->res_ctl); 641 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 642 fdc->res_ctl); 643 } 644 if (fdc->res_ioport != 0) { 645 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 646 fdc->res_ioport); 647 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 648 fdc->res_ioport); 649 } 650 if (fdc->res_drq != 0) { 651 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 652 fdc->res_drq); 653 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 654 fdc->res_drq); 655 } 656 } 657 658 /****************************************************************************/ 659 /* autoconfiguration stuff */ 660 /****************************************************************************/ 661 662 static struct isa_pnp_id fdc_ids[] = { 663 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 664 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 665 {0} 666 }; 667 668 int 669 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result) 670 { 671 struct fdc_ivars *ivars = device_get_ivars(child); 672 673 switch (which) { 674 case FDC_IVAR_FDUNIT: 675 *result = ivars->fdunit; 676 break; 677 default: 678 return ENOENT; 679 } 680 return 0; 681 } 682 683 /* 684 * fdc controller section. 685 */ 686 static int 687 fdc_probe(device_t dev) 688 { 689 int error, ic_type; 690 struct fdc_data *fdc; 691 692 fdc = device_get_softc(dev); 693 bzero(fdc, sizeof *fdc); 694 fdc->fdc_dev = dev; 695 fdc->fdctl_wr = fdctl_wr_isa; 696 697 /* Check pnp ids */ 698 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 699 if (error == ENXIO) 700 return ENXIO; 701 if (error == 0) 702 fdc->flags |= FDC_ISPNP; 703 704 /* Attempt to allocate our resources for the duration of the probe */ 705 error = fdc_alloc_resources(fdc); 706 if (error) 707 goto out; 708 709 /* First - lets reset the floppy controller */ 710 fdout_wr(fdc, 0); 711 DELAY(100); 712 fdout_wr(fdc, FDO_FRST); 713 714 /* see if it can handle a command */ 715 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 716 NE7_SPEC_2(2, 0), 0)) { 717 error = ENXIO; 718 goto out; 719 } 720 721 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 722 ic_type = (u_char)ic_type; 723 switch (ic_type) { 724 case 0x80: 725 device_set_desc(dev, "NEC 765 or clone"); 726 fdc->fdct = FDC_NE765; 727 break; 728 case 0x81: 729 device_set_desc(dev, "Intel 82077 or clone"); 730 fdc->fdct = FDC_I82077; 731 break; 732 case 0x90: 733 device_set_desc(dev, "NEC 72065B or clone"); 734 fdc->fdct = FDC_NE72065; 735 break; 736 default: 737 device_set_desc(dev, "generic floppy controller"); 738 fdc->fdct = FDC_UNKNOWN; 739 break; 740 } 741 } 742 743 out: 744 fdc_release_resources(fdc); 745 return (error); 746 } 747 748 /* 749 * Add a child device to the fdc controller. It will then be probed etc. 750 */ 751 static void 752 fdc_add_child(device_t dev, const char *name, int unit) 753 { 754 int disabled; 755 struct fdc_ivars *ivar; 756 device_t child; 757 758 ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO); 759 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 760 ivar->fdunit = 0; 761 child = device_add_child(dev, name, unit); 762 if (child == NULL) 763 return; 764 device_set_ivars(child, ivar); 765 if (resource_int_value(name, unit, "disabled", &disabled) == 0 766 && disabled != 0) 767 device_disable(child); 768 } 769 770 int 771 fdc_attach(device_t dev) 772 { 773 struct fdc_data *fdc; 774 int i, error; 775 776 fdc = device_get_softc(dev); 777 778 callout_init(&fdc->pseudointr_ch); 779 780 error = fdc_alloc_resources(fdc); 781 if (error) { 782 device_printf(dev, "cannot reacquire resources\n"); 783 return error; 784 } 785 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 786 0, fdc_intr, fdc, 787 &fdc->fdc_intr, NULL, NULL); 788 if (error) { 789 device_printf(dev, "cannot setup interrupt\n"); 790 return error; 791 } 792 fdc->fdcu = device_get_unit(dev); 793 fdc->flags |= FDC_ATTACHED; 794 795 if ((fdc->flags & FDC_NODMA) == 0) { 796 /* Acquire the DMA channel forever, The driver will do the rest */ 797 /* XXX should integrate with rman */ 798 error = isa_dma_acquire(fdc->dmachan); 799 if (!error) { 800 error = isa_dma_init(fdc->dmachan, 128 << 3 /* XXX max secsize */, 801 M_WAITOK); 802 if (error) { 803 isa_dma_release(fdc->dmachan); 804 device_printf(dev, "disabling dma\n"); 805 fdc->flags |= FDC_NODMA; 806 } 807 } 808 } 809 fdc->state = DEVIDLE; 810 811 /* reset controller, turn motor off, clear fdout mirror reg */ 812 fdout_wr(fdc, ((fdc->fdout = 0))); 813 bioq_init(&fdc->bio_queue); 814 815 /* 816 * Probe and attach any children. We should probably detect 817 * devices from the BIOS unless overridden. 818 */ 819 for (i = resource_query_string(-1, "at", device_get_nameunit(dev)); 820 i != -1; 821 i = resource_query_string(i, "at", device_get_nameunit(dev))) 822 fdc_add_child(dev, resource_query_name(i), 823 resource_query_unit(i)); 824 825 return (bus_generic_attach(dev)); 826 } 827 828 int 829 fdc_print_child(device_t me, device_t child) 830 { 831 int retval = 0; 832 833 retval += bus_print_child_header(me, child); 834 retval += kprintf(" on %s drive %d\n", device_get_nameunit(me), 835 fdc_get_fdunit(child)); 836 837 return (retval); 838 } 839 840 static device_method_t fdc_methods[] = { 841 /* Device interface */ 842 DEVMETHOD(device_probe, fdc_probe), 843 DEVMETHOD(device_attach, fdc_attach), 844 DEVMETHOD(device_detach, bus_generic_detach), 845 DEVMETHOD(device_shutdown, bus_generic_shutdown), 846 DEVMETHOD(device_suspend, bus_generic_suspend), 847 DEVMETHOD(device_resume, bus_generic_resume), 848 849 /* Bus interface */ 850 DEVMETHOD(bus_print_child, fdc_print_child), 851 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 852 /* Our children never use any other bus interface methods. */ 853 854 DEVMETHOD_END 855 }; 856 857 static driver_t fdc_driver = { 858 "fdc", 859 fdc_methods, 860 sizeof(struct fdc_data) 861 }; 862 863 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, NULL, NULL); 864 #if 0 865 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, NULL, NULL); 866 #endif 867 868 /******************************************************************/ 869 /* 870 * devices attached to the controller section. 871 */ 872 static int 873 fd_probe(device_t dev) 874 { 875 int i; 876 u_int fdt, st0, st3; 877 struct fd_data *fd; 878 struct fdc_data *fdc; 879 fdsu_t fdsu; 880 static int fd_fifo = 0; 881 882 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 883 fd = device_get_softc(dev); 884 fdc = device_get_softc(device_get_parent(dev)); 885 886 bzero(fd, sizeof *fd); 887 fd->dev = dev; 888 fd->fdc = fdc; 889 fd->fdsu = fdsu; 890 fd->fdu = device_get_unit(dev); 891 892 #ifdef __x86_64__ 893 /* look up what bios thinks we have */ 894 switch (fd->fdu) { 895 case 0: 896 if ((fdc->flags & FDC_ISPCMCIA)) 897 fdt = RTCFDT_144M; 898 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0) 899 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED; 900 else 901 fdt = (rtcin(RTC_FDISKETTE) & 0xf0); 902 break; 903 case 1: 904 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0); 905 break; 906 default: 907 fdt = RTCFDT_NONE; 908 break; 909 } 910 #else 911 fdt = RTCFDT_144M; /* XXX probably */ 912 #endif 913 914 /* is there a unit? */ 915 if (fdt == RTCFDT_NONE) 916 return (ENXIO); 917 918 /* select it */ 919 set_motor(fdc, fdsu, TURNON); 920 DELAY(1000000); /* 1 sec */ 921 922 /* XXX This doesn't work before the first set_motor() */ 923 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN 924 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 925 && enable_fifo(fdc) == 0) { 926 device_printf(device_get_parent(dev), 927 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 928 } 929 fd_fifo = 1; 930 931 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) 932 && (st3 & NE7_ST3_T0)) { 933 /* if at track 0, first seek inwards */ 934 /* seek some steps: */ 935 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0); 936 DELAY(300000); /* ...wait a moment... */ 937 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */ 938 } 939 940 /* If we're at track 0 first seek inwards. */ 941 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) { 942 /* Seek some steps... */ 943 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 944 /* ...wait a moment... */ 945 DELAY(300000); 946 /* make ctrlr happy: */ 947 fd_sense_int(fdc, 0, 0); 948 } 949 } 950 951 for (i = 0; i < 2; i++) { 952 /* 953 * we must recalibrate twice, just in case the 954 * heads have been beyond cylinder 76, since most 955 * FDCs still barf when attempting to recalibrate 956 * more than 77 steps 957 */ 958 /* go back to 0: */ 959 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 960 /* a second being enough for full stroke seek*/ 961 DELAY(i == 0 ? 1000000 : 300000); 962 963 /* anything responding? */ 964 if (fd_sense_int(fdc, &st0, 0) == 0 && 965 (st0 & NE7_ST0_EC) == 0) 966 break; /* already probed succesfully */ 967 } 968 } 969 970 set_motor(fdc, fdsu, TURNOFF); 971 972 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */ 973 return (ENXIO); 974 975 fd->track = FD_NO_TRACK; 976 fd->fdc = fdc; 977 fd->fdsu = fdsu; 978 fd->options = 0; 979 callout_init(&fd->toffhandle); 980 callout_init(&fd->tohandle); 981 callout_init(&fd->motor); 982 983 switch (fdt) { 984 case RTCFDT_12M: 985 device_set_desc(dev, "1200-KB 5.25\" drive"); 986 fd->type = FD_1200; 987 break; 988 case RTCFDT_144M | RTCFDT_144M_PRETENDED: 989 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive"); 990 fd->type = FD_1440; 991 break; 992 case RTCFDT_144M: 993 device_set_desc(dev, "1440-KB 3.5\" drive"); 994 fd->type = FD_1440; 995 break; 996 case RTCFDT_288M: 997 case RTCFDT_288M_1: 998 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 999 fd->type = FD_1440; 1000 break; 1001 case RTCFDT_360K: 1002 device_set_desc(dev, "360-KB 5.25\" drive"); 1003 fd->type = FD_360; 1004 break; 1005 case RTCFDT_720K: 1006 kprintf("720-KB 3.5\" drive"); 1007 fd->type = FD_720; 1008 break; 1009 default: 1010 return (ENXIO); 1011 } 1012 fd->ft = fd_types[fd->type - 1]; 1013 return (0); 1014 } 1015 1016 static int 1017 fd_attach(device_t dev) 1018 { 1019 struct disk_info info; 1020 struct fd_data *fd; 1021 struct fd_type *ft; 1022 1023 fd = device_get_softc(dev); 1024 1025 disk_create(fd->fdu, &fd->disk, &fd_ops); 1026 disk_setdisktype(&fd->disk, "floppy"); 1027 1028 /* 1029 * Make special raw floppy devices with preset types to 1030 * make formatting easier. These override the disk management 1031 * layer for the whole-slice-disk for partitions 128-191. Note 1032 * that we do not override partition 255, which is the 1033 * whole-slice-part. If we did we would have to provide our 1034 * own DIOCGPART ioctl. 1035 */ 1036 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 1), 1037 UID_ROOT, GID_WHEEL, 0600, "fd%d.1720", fd->fdu); 1038 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 2), 1039 UID_ROOT, GID_WHEEL, 0600, "fd%d.1480", fd->fdu); 1040 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 3), 1041 UID_ROOT, GID_WHEEL, 0600, "fd%d.1440", fd->fdu); 1042 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 4), 1043 UID_ROOT, GID_WHEEL, 0600, "fd%d.1200", fd->fdu); 1044 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 5), 1045 UID_ROOT, GID_WHEEL, 0600, "fd%d.820", fd->fdu); 1046 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 6), 1047 UID_ROOT, GID_WHEEL, 0600, "fd%d.800", fd->fdu); 1048 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 7), 1049 UID_ROOT, GID_WHEEL, 0600, "fd%d.720", fd->fdu); 1050 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 8), 1051 UID_ROOT, GID_WHEEL, 0600, "fd%d.360", fd->fdu); 1052 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 9), 1053 UID_ROOT, GID_WHEEL, 0600, "fd%d.640", fd->fdu); 1054 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 10), 1055 UID_ROOT, GID_WHEEL, 0600, "fd%d.1232", fd->fdu); 1056 1057 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1058 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS, 1059 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1060 DEVSTAT_PRIORITY_FD); 1061 1062 if (fd->type != NO_TYPE) { 1063 bzero(&info, sizeof(info)); 1064 ft = &fd_types[fd->type - 1]; 1065 info.d_media_blksize = 128 << ft->secsize; 1066 info.d_media_blocks = ft->size; 1067 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR; 1068 info.d_nheads = ft->heads; 1069 info.d_secpertrack = ft->sectrac; 1070 info.d_secpercyl = ft->sectrac * ft->heads; 1071 info.d_ncylinders = ft->size / info.d_secpercyl; 1072 disk_setdiskinfo(&fd->disk, &info); 1073 } 1074 return (0); 1075 } 1076 1077 static int 1078 fd_detach(device_t dev) 1079 { 1080 struct fd_data *fd; 1081 1082 fd = device_get_softc(dev); 1083 kprintf("devfs: Please make sure that only the right fd device was removed!!!\n"); 1084 dev_ops_remove_minor(&fd_ops, 1085 /*dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),*/ 1086 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128)); 1087 disk_invalidate(&fd->disk); 1088 disk_destroy(&fd->disk); 1089 devstat_remove_entry(&fd->device_stats); 1090 callout_stop(&fd->toffhandle); 1091 callout_stop(&fd->motor); 1092 1093 return (0); 1094 } 1095 1096 static device_method_t fd_methods[] = { 1097 /* Device interface */ 1098 DEVMETHOD(device_probe, fd_probe), 1099 DEVMETHOD(device_attach, fd_attach), 1100 DEVMETHOD(device_detach, fd_detach), 1101 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1102 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1103 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1104 1105 DEVMETHOD_END 1106 }; 1107 1108 static driver_t fd_driver = { 1109 "fd", 1110 fd_methods, 1111 sizeof(struct fd_data) 1112 }; 1113 1114 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, NULL, NULL); 1115 1116 /****************************************************************************/ 1117 /* motor control stuff */ 1118 /* remember to not deselect the drive we're working on */ 1119 /****************************************************************************/ 1120 static void 1121 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1122 { 1123 int fdout = fdc->fdout; 1124 int needspecify = 0; 1125 1126 if(turnon) { 1127 fdout &= ~FDO_FDSEL; 1128 fdout |= (FDO_MOEN0 << fdsu) + fdsu; 1129 } else 1130 fdout &= ~(FDO_MOEN0 << fdsu); 1131 1132 if(!turnon 1133 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0) 1134 /* gonna turn off the last drive, put FDC to bed */ 1135 fdout &= ~ (FDO_FRST|FDO_FDMAEN); 1136 else { 1137 /* make sure controller is selected and specified */ 1138 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0) 1139 needspecify = 1; 1140 fdout |= (FDO_FRST|FDO_FDMAEN); 1141 } 1142 1143 fdout_wr(fdc, fdout); 1144 fdc->fdout = fdout; 1145 TRACE1("[0x%x->FDOUT]", fdout); 1146 1147 if (needspecify) { 1148 /* 1149 * XXX 1150 * special case: since we have just woken up the FDC 1151 * from its sleep, we silently assume the command will 1152 * be accepted, and do not test for a timeout 1153 */ 1154 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1155 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1156 0); 1157 if (fdc->flags & FDC_HAS_FIFO) 1158 (void) enable_fifo(fdc); 1159 } 1160 } 1161 1162 static void 1163 fd_turnoff(void *xfd) 1164 { 1165 fd_p fd = xfd; 1166 1167 TRACE1("[fd%d: turnoff]", fd->fdu); 1168 1169 crit_enter(); 1170 /* 1171 * Don't turn off the motor yet if the drive is active. 1172 * 1173 * If we got here, this could only mean we missed an interrupt. 1174 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1175 * after a controller reset. Just schedule a pseudo-interrupt 1176 * so the state machine gets re-entered. 1177 */ 1178 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1179 fdc_intr(fd->fdc); 1180 crit_exit(); 1181 return; 1182 } 1183 1184 fd->flags &= ~FD_MOTOR; 1185 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1186 crit_exit(); 1187 } 1188 1189 static void 1190 fd_motor_on(void *xfd) 1191 { 1192 fd_p fd = xfd; 1193 1194 crit_enter(); 1195 fd->flags &= ~FD_MOTOR_WAIT; 1196 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1197 { 1198 fdc_intr(fd->fdc); 1199 } 1200 crit_exit(); 1201 } 1202 1203 static void 1204 fd_turnon(fd_p fd) 1205 { 1206 if(!(fd->flags & FD_MOTOR)) 1207 { 1208 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1209 set_motor(fd->fdc, fd->fdsu, TURNON); 1210 callout_reset(&fd->motor, hz, fd_motor_on, fd); 1211 } 1212 } 1213 1214 static void 1215 fdc_reset(fdc_p fdc) 1216 { 1217 /* Try a reset, keep motor on */ 1218 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1219 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1220 DELAY(100); 1221 /* enable FDC, but defer interrupts a moment */ 1222 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1223 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1224 DELAY(100); 1225 fdout_wr(fdc, fdc->fdout); 1226 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1227 1228 /* XXX after a reset, silently believe the FDC will accept commands */ 1229 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1230 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1231 0); 1232 if (fdc->flags & FDC_HAS_FIFO) 1233 (void) enable_fifo(fdc); 1234 } 1235 1236 /****************************************************************************/ 1237 /* fdc in/out */ 1238 /****************************************************************************/ 1239 /* 1240 * FDC IO functions, take care of the main status register, timeout 1241 * in case the desired status bits are never set. 1242 * 1243 * These PIO loops initially start out with short delays between 1244 * each iteration in the expectation that the required condition 1245 * is usually met quickly, so it can be handled immediately. After 1246 * about 1 ms, stepping is increased to achieve a better timing 1247 * accuracy in the calls to DELAY(). 1248 */ 1249 static int 1250 fd_in(struct fdc_data *fdc, int *ptr) 1251 { 1252 int i, j, step; 1253 1254 for (j = 0, step = 1; 1255 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) && 1256 j < FDSTS_TIMEOUT; 1257 j += step) { 1258 if (i == NE7_RQM) 1259 return (fdc_err(fdc, "ready for output in input\n")); 1260 if (j == 1000) 1261 step = 1000; 1262 DELAY(step); 1263 } 1264 if (j >= FDSTS_TIMEOUT) 1265 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); 1266 #ifdef FDC_DEBUG 1267 i = fddata_rd(fdc); 1268 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1269 *ptr = i; 1270 return (0); 1271 #else /* !FDC_DEBUG */ 1272 i = fddata_rd(fdc); 1273 if (ptr) 1274 *ptr = i; 1275 return (0); 1276 #endif /* FDC_DEBUG */ 1277 } 1278 1279 static int 1280 out_fdc(struct fdc_data *fdc, int x) 1281 { 1282 int i, j, step; 1283 1284 for (j = 0, step = 1; 1285 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM && 1286 j < FDSTS_TIMEOUT; 1287 j += step) { 1288 if (i == (NE7_DIO|NE7_RQM)) 1289 return (fdc_err(fdc, "ready for input in output\n")); 1290 if (j == 1000) 1291 step = 1000; 1292 DELAY(step); 1293 } 1294 if (j >= FDSTS_TIMEOUT) 1295 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); 1296 1297 /* Send the command and return */ 1298 fddata_wr(fdc, x); 1299 TRACE1("[0x%x->FDDATA]", x); 1300 return (0); 1301 } 1302 1303 /****************************************************************************/ 1304 /* fdopen/fdclose */ 1305 /****************************************************************************/ 1306 int 1307 Fdopen(struct dev_open_args *ap) 1308 { 1309 cdev_t dev = ap->a_head.a_dev; 1310 fdu_t fdu = dkunit(dev); 1311 struct disk_info info; 1312 struct fd_type *ft; 1313 int type; 1314 int changetype; 1315 fd_p fd; 1316 fdc_p fdc; 1317 1318 /* check bounds */ 1319 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1320 return (ENXIO); 1321 fdc = fd->fdc; 1322 if ((fdc == NULL) || (fd->type == NO_TYPE)) 1323 return (ENXIO); 1324 1325 /* 1326 * Figure out the type of floppy. There are special whole-disk-device 1327 * overrides that will override the current type. 1328 */ 1329 type = dkpart(dev); 1330 if (type == WHOLE_SLICE_PART) { 1331 type = fd->type; /* do not change selected type data */ 1332 changetype = 0; 1333 } else if (type > 128) { 1334 type -= 128; /* set to specific format */ 1335 changetype = 1; 1336 } else { 1337 type = fd->type; /* reset to default */ 1338 changetype = 1; 1339 } 1340 if (type > NUMDENS) 1341 return (ENXIO); 1342 if (type != fd->type) { 1343 /* 1344 * For each type of basic drive, make sure we are trying 1345 * to open a type it can do, 1346 */ 1347 switch (fd->type) { 1348 case FD_360: 1349 return (ENXIO); 1350 case FD_720: 1351 if ( type != FD_820 1352 && type != FD_800 1353 && type != FD_640 1354 ) 1355 return (ENXIO); 1356 break; 1357 case FD_1200: 1358 switch (type) { 1359 case FD_1480: 1360 type = FD_1480in5_25; 1361 break; 1362 case FD_1440: 1363 type = FD_1440in5_25; 1364 break; 1365 case FD_1232: 1366 break; 1367 case FD_820: 1368 type = FD_820in5_25; 1369 break; 1370 case FD_800: 1371 type = FD_800in5_25; 1372 break; 1373 case FD_720: 1374 type = FD_720in5_25; 1375 break; 1376 case FD_640: 1377 type = FD_640in5_25; 1378 break; 1379 case FD_360: 1380 type = FD_360in5_25; 1381 break; 1382 default: 1383 return(ENXIO); 1384 } 1385 break; 1386 case FD_1440: 1387 if ( type != FD_1720 1388 && type != FD_1480 1389 && type != FD_1200 1390 && type != FD_820 1391 && type != FD_800 1392 && type != FD_720 1393 && type != FD_640 1394 ) 1395 return(ENXIO); 1396 break; 1397 } 1398 } 1399 1400 /* 1401 * fd->type is the basic drive type, not the current format 1402 * we are reading. We only change the type when opening the 1403 * whole-slice-partition 1404 */ 1405 if (changetype) 1406 fd->ft = fd_types[type - 1]; 1407 fd->flags |= FD_OPEN; 1408 1409 /* 1410 * Clearing the DMA overrun counter at open time is a bit messy. 1411 * Since we're only managing one counter per controller, opening 1412 * the second drive could mess it up. Anyway, if the DMA overrun 1413 * condition is really persistent, it will eventually time out 1414 * still. OTOH, clearing it here will ensure we'll at least start 1415 * trying again after a previous (maybe even long ago) failure. 1416 * Also, this is merely a stop-gap measure only that should not 1417 * happen during normal operation, so we can tolerate it to be a 1418 * bit sloppy about this. 1419 */ 1420 fdc->dma_overruns = 0; 1421 1422 /* 1423 * Set disk parameters for the disk management layer. 1424 * 1425 * Note that we do not set RAWEXTENSIONS here. We override 1426 * the minor numbers in the raw-extension range and handle them 1427 * directly. 1428 */ 1429 bzero(&info, sizeof(info)); 1430 ft = &fd->ft; 1431 info.d_media_blksize = 128 << ft->secsize; 1432 info.d_media_blocks = ft->size; 1433 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR; 1434 info.d_nheads = ft->heads; 1435 info.d_secpertrack = ft->sectrac; 1436 info.d_secpercyl = ft->sectrac * ft->heads; 1437 info.d_ncylinders = ft->size / info.d_secpercyl; 1438 disk_setdiskinfo(&fd->disk, &info); 1439 1440 return 0; 1441 } 1442 1443 int 1444 fdclose(struct dev_close_args *ap) 1445 { 1446 cdev_t dev = ap->a_head.a_dev; 1447 fdu_t fdu = dkunit(dev); 1448 struct fd_data *fd; 1449 1450 fd = devclass_get_softc(fd_devclass, fdu); 1451 fd->flags &= ~FD_OPEN; 1452 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG); 1453 1454 return (0); 1455 } 1456 1457 /****************************************************************************/ 1458 /* fdstrategy */ 1459 /****************************************************************************/ 1460 int 1461 fdstrategy(struct dev_strategy_args *ap) 1462 { 1463 cdev_t dev = ap->a_head.a_dev; 1464 struct bio *bio = ap->a_bio; 1465 struct buf *bp = bio->bio_buf; 1466 unsigned nblocks, blknum, cando; 1467 fdu_t fdu; 1468 fdc_p fdc; 1469 fd_p fd; 1470 size_t fdblk; 1471 1472 fdu = dkunit(dev); 1473 fd = devclass_get_softc(fd_devclass, fdu); 1474 if (fd == 0) 1475 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1476 (u_long)major(dev), (u_long)minor(dev)); 1477 fdc = fd->fdc; 1478 if (fd->type == NO_TYPE) { 1479 bp->b_error = ENXIO; 1480 bp->b_flags |= B_ERROR; 1481 goto bad; 1482 } 1483 1484 fdblk = 128 << (fd->ft.secsize); 1485 if (bp->b_cmd != BUF_CMD_FORMAT) { 1486 if (bio->bio_offset < 0) { 1487 kprintf( 1488 "fd%d: fdstrat: bad request offset = %"PRId64", bcount = %d\n", 1489 fdu, bio->bio_offset, bp->b_bcount); 1490 bp->b_error = EINVAL; 1491 bp->b_flags |= B_ERROR; 1492 goto bad; 1493 } 1494 if ((bp->b_bcount % fdblk) != 0) { 1495 bp->b_error = EINVAL; 1496 bp->b_flags |= B_ERROR; 1497 goto bad; 1498 } 1499 } 1500 1501 /* 1502 * Set up block calculations. 1503 */ 1504 if (bio->bio_offset > 20000000LL * fdblk) { 1505 /* 1506 * Reject unreasonably high block number, prevent the 1507 * multiplication below from overflowing. 1508 */ 1509 bp->b_error = EINVAL; 1510 bp->b_flags |= B_ERROR; 1511 goto bad; 1512 } 1513 blknum = (unsigned)(bio->bio_offset / fdblk); 1514 nblocks = fd->ft.size; 1515 bp->b_resid = 0; 1516 if (blknum + (bp->b_bcount / fdblk) > nblocks) { 1517 if (blknum <= nblocks) { 1518 cando = (nblocks - blknum) * fdblk; 1519 bp->b_resid = bp->b_bcount - cando; 1520 if (cando == 0) 1521 goto bad; /* not actually bad but EOF */ 1522 } else { 1523 bp->b_error = EINVAL; 1524 bp->b_flags |= B_ERROR; 1525 goto bad; 1526 } 1527 } 1528 crit_enter(); 1529 bio->bio_driver_info = dev; 1530 bioqdisksort(&fdc->bio_queue, bio); 1531 callout_stop(&fd->toffhandle); 1532 1533 /* Tell devstat we are starting on the transaction */ 1534 devstat_start_transaction(&fd->device_stats); 1535 #if 0 1536 device_busy(fd->dev); 1537 #endif 1538 fdstart(fdc); 1539 crit_exit(); 1540 return(0); 1541 1542 bad: 1543 biodone(bio); 1544 return(0); 1545 } 1546 1547 /***************************************************************\ 1548 * fdstart * 1549 * We have just queued something.. if the controller is not busy * 1550 * then simulate the case where it has just finished a command * 1551 * So that it (the interrupt routine) looks on the queue for more* 1552 * work to do and picks up what we just added. * 1553 * If the controller is already busy, we need do nothing, as it * 1554 * will pick up our work when the present work completes * 1555 \***************************************************************/ 1556 static void 1557 fdstart(struct fdc_data *fdc) 1558 { 1559 crit_enter(); 1560 if(fdc->state == DEVIDLE) 1561 { 1562 fdc_intr(fdc); 1563 } 1564 crit_exit(); 1565 } 1566 1567 static void 1568 fd_iotimeout(void *xfdc) 1569 { 1570 fdc_p fdc; 1571 1572 fdc = xfdc; 1573 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1574 1575 /* 1576 * Due to IBM's brain-dead design, the FDC has a faked ready 1577 * signal, hardwired to ready == true. Thus, any command 1578 * issued if there's no diskette in the drive will _never_ 1579 * complete, and must be aborted by resetting the FDC. 1580 * Many thanks, Big Blue! 1581 * The FDC must not be reset directly, since that would 1582 * interfere with the state machine. Instead, pretend that 1583 * the command completed but was invalid. The state machine 1584 * will reset the FDC and retry once. 1585 */ 1586 crit_enter(); 1587 fdc->status[0] = NE7_ST0_IC_IV; 1588 fdc->flags &= ~FDC_STAT_VALID; 1589 fdc->state = IOTIMEDOUT; 1590 fdc_intr(fdc); 1591 crit_exit(); 1592 } 1593 1594 /* just ensure it is running in a critical section */ 1595 static void 1596 fd_pseudointr(void *xfdc) 1597 { 1598 crit_enter(); 1599 fdc_intr(xfdc); 1600 crit_exit(); 1601 } 1602 1603 /***********************************************************************\ 1604 * fdintr * 1605 * keep calling the state machine until it returns a 0 * 1606 * ALWAYS called at SPLBIO * 1607 \***********************************************************************/ 1608 static void 1609 fdc_intr(void *xfdc) 1610 { 1611 fdc_p fdc = xfdc; 1612 while(fdstate(fdc)) 1613 ; 1614 } 1615 1616 /* 1617 * magic pseudo-DMA initialization for YE FDC. Sets count and 1618 * direction 1619 */ 1620 #define SET_BCDR(fdc,wr,cnt,port) \ 1621 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1622 ((cnt)-1) & 0xff); \ 1623 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1624 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1625 1626 /* 1627 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy 1628 */ 1629 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count) 1630 { 1631 u_char *cptr = (u_char *)addr; 1632 1633 if (cmd == BUF_CMD_READ) { 1634 if (fdc->state != PIOREAD) { 1635 fdc->state = PIOREAD; 1636 return(0); 1637 } 1638 SET_BCDR(fdc, 0, count, 0); 1639 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1640 FDC_YE_DATAPORT, cptr, count); 1641 } else { 1642 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1643 FDC_YE_DATAPORT, cptr, count); 1644 SET_BCDR(fdc, 0, count, 0); 1645 } 1646 return(1); 1647 } 1648 1649 /***********************************************************************\ 1650 * The controller state machine. * 1651 * if it returns a non zero value, it should be called again immediatly * 1652 \***********************************************************************/ 1653 static int 1654 fdstate(fdc_p fdc) 1655 { 1656 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3; 1657 unsigned blknum = 0, b_cylinder = 0; 1658 fdu_t fdu; 1659 fd_p fd; 1660 struct bio *bio; 1661 struct buf *bp; 1662 struct fd_formb *finfo = NULL; 1663 size_t fdblk; 1664 cdev_t dev; 1665 1666 bio = fdc->bio; 1667 if (bio == NULL) { 1668 bio = bioq_first(&fdc->bio_queue); 1669 if (bio != NULL) { 1670 bioq_remove(&fdc->bio_queue, bio); 1671 fdc->bio = bio; 1672 } 1673 } 1674 if (bio == NULL) { 1675 /***********************************************\ 1676 * nothing left for this controller to do * 1677 * Force into the IDLE state, * 1678 \***********************************************/ 1679 fdc->state = DEVIDLE; 1680 if (fdc->fd) { 1681 device_printf(fdc->fdc_dev, 1682 "unexpected valid fd pointer\n"); 1683 fdc->fd = (fd_p) 0; 1684 fdc->fdu = -1; 1685 } 1686 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1687 return (0); 1688 } 1689 bp = bio->bio_buf; 1690 dev = bio->bio_driver_info; 1691 1692 fdu = dkunit(dev); 1693 fd = devclass_get_softc(fd_devclass, fdu); 1694 fdblk = 128 << fd->ft.secsize; 1695 if (fdc->fd && (fd != fdc->fd)) 1696 device_printf(fd->dev, "confused fd pointers\n"); 1697 read = (bp->b_cmd == BUF_CMD_READ); 1698 format = (bp->b_cmd == BUF_CMD_FORMAT); 1699 if (format) { 1700 finfo = (struct fd_formb *)bp->b_data; 1701 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 1702 - (char *)finfo; 1703 } 1704 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) { 1705 blknum = (unsigned)(bio->bio_offset / fdblk) + 1706 fd->skip /fdblk; 1707 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads); 1708 } 1709 TRACE1("fd%d", fdu); 1710 TRACE1("[%s]", fdstates[fdc->state]); 1711 TRACE1("(0x%x)", fd->flags); 1712 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd); 1713 switch (fdc->state) 1714 { 1715 case DEVIDLE: 1716 case FINDWORK: /* we have found new work */ 1717 fdc->retry = 0; 1718 fd->skip = 0; 1719 fdc->fd = fd; 1720 fdc->fdu = fdu; 1721 fdc->fdctl_wr(fdc, fd->ft.trans); 1722 TRACE1("[0x%x->FDCTL]", fd->ft.trans); 1723 /*******************************************************\ 1724 * If the next drive has a motor startup pending, then * 1725 * it will start up in its own good time * 1726 \*******************************************************/ 1727 if(fd->flags & FD_MOTOR_WAIT) { 1728 fdc->state = MOTORWAIT; 1729 return (0); /* come back later */ 1730 } 1731 /*******************************************************\ 1732 * Maybe if it's not starting, it SHOULD be starting * 1733 \*******************************************************/ 1734 if (!(fd->flags & FD_MOTOR)) 1735 { 1736 fdc->state = MOTORWAIT; 1737 fd_turnon(fd); 1738 return (0); 1739 } 1740 else /* at least make sure we are selected */ 1741 { 1742 set_motor(fdc, fd->fdsu, TURNON); 1743 } 1744 if (fdc->flags & FDC_NEEDS_RESET) { 1745 fdc->state = RESETCTLR; 1746 fdc->flags &= ~FDC_NEEDS_RESET; 1747 } else 1748 fdc->state = DOSEEK; 1749 break; 1750 case DOSEEK: 1751 if (b_cylinder == (unsigned)fd->track) 1752 { 1753 fdc->state = SEEKCOMPLETE; 1754 break; 1755 } 1756 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 1757 fd->fdsu, b_cylinder * fd->ft.steptrac, 1758 0)) 1759 { 1760 /* 1761 * seek command not accepted, looks like 1762 * the FDC went off to the Saints... 1763 */ 1764 fdc->retry = 6; /* try a reset */ 1765 return(retrier(fdc)); 1766 } 1767 fd->track = FD_NO_TRACK; 1768 fdc->state = SEEKWAIT; 1769 return(0); /* will return later */ 1770 case SEEKWAIT: 1771 /* allow heads to settle */ 1772 callout_reset(&fdc->pseudointr_ch, hz / 16, 1773 fd_pseudointr, fdc); 1774 fdc->state = SEEKCOMPLETE; 1775 return(0); /* will return later */ 1776 case SEEKCOMPLETE : /* SEEK DONE, START DMA */ 1777 /* Make sure seek really happened*/ 1778 if(fd->track == FD_NO_TRACK) { 1779 int descyl = b_cylinder * fd->ft.steptrac; 1780 do { 1781 /* 1782 * This might be a "ready changed" interrupt, 1783 * which cannot really happen since the 1784 * RDY pin is hardwired to + 5 volts. This 1785 * generally indicates a "bouncing" intr 1786 * line, so do one of the following: 1787 * 1788 * When running on an enhanced FDC that is 1789 * known to not go stuck after responding 1790 * with INVALID, fetch all interrupt states 1791 * until seeing either an INVALID or a 1792 * real interrupt condition. 1793 * 1794 * When running on a dumb old NE765, give 1795 * up immediately. The controller will 1796 * provide up to four dummy RC interrupt 1797 * conditions right after reset (for the 1798 * corresponding four drives), so this is 1799 * our only chance to get notice that it 1800 * was not the FDC that caused the interrupt. 1801 */ 1802 if (fd_sense_int(fdc, &st0, &cyl) 1803 == FD_NOT_VALID) 1804 return 0; 1805 if(fdc->fdct == FDC_NE765 1806 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1807 return 0; /* hope for a real intr */ 1808 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1809 1810 if (0 == descyl) { 1811 int failed = 0; 1812 /* 1813 * seek to cyl 0 requested; make sure we are 1814 * really there 1815 */ 1816 if (fd_sense_drive_status(fdc, &st3)) 1817 failed = 1; 1818 if ((st3 & NE7_ST3_T0) == 0) { 1819 kprintf( 1820 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 1821 fdu, st3, NE7_ST3BITS); 1822 failed = 1; 1823 } 1824 1825 if (failed) { 1826 if(fdc->retry < 3) 1827 fdc->retry = 3; 1828 return (retrier(fdc)); 1829 } 1830 } 1831 1832 if (cyl != descyl) { 1833 kprintf( 1834 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 1835 fdu, descyl, cyl, st0); 1836 if (fdc->retry < 3) 1837 fdc->retry = 3; 1838 return (retrier(fdc)); 1839 } 1840 } 1841 1842 fd->track = b_cylinder; 1843 if (!(fdc->flags & FDC_NODMA)) { 1844 isa_dmastart(isa_dmabp(bp), 1845 bp->b_data+fd->skip, 1846 format ? bp->b_bcount : fdblk, fdc->dmachan); 1847 } 1848 sectrac = fd->ft.sectrac; 1849 sec = blknum % (sectrac * fd->ft.heads); 1850 head = sec / sectrac; 1851 sec = sec % sectrac + 1; 1852 fd->hddrv = ((head&1)<<2)+fdu; 1853 1854 if(format || !read) 1855 { 1856 /* make sure the drive is writable */ 1857 if(fd_sense_drive_status(fdc, &st3) != 0) 1858 { 1859 /* stuck controller? */ 1860 if (!(fdc->flags & FDC_NODMA)) 1861 isa_dmadone(isa_dmabp(bp), 1862 bp->b_data + fd->skip, 1863 format ? bp->b_bcount : fdblk, 1864 fdc->dmachan); 1865 fdc->retry = 6; /* reset the beast */ 1866 return (retrier(fdc)); 1867 } 1868 if(st3 & NE7_ST3_WP) 1869 { 1870 /* 1871 * XXX YES! this is ugly. 1872 * in order to force the current operation 1873 * to fail, we will have to fake an FDC 1874 * error - all error handling is done 1875 * by the retrier() 1876 */ 1877 fdc->status[0] = NE7_ST0_IC_AT; 1878 fdc->status[1] = NE7_ST1_NW; 1879 fdc->status[2] = 0; 1880 fdc->status[3] = fd->track; 1881 fdc->status[4] = head; 1882 fdc->status[5] = sec; 1883 fdc->retry = 8; /* break out immediately */ 1884 fdc->state = IOTIMEDOUT; /* not really... */ 1885 return (1); 1886 } 1887 } 1888 1889 if (format) { 1890 if (fdc->flags & FDC_NODMA) { 1891 /* 1892 * This seems to be necessary for 1893 * whatever obscure reason; if we omit 1894 * it, we end up filling the sector ID 1895 * fields of the newly formatted track 1896 * entirely with garbage, causing 1897 * `wrong cylinder' errors all over 1898 * the place when trying to read them 1899 * back. 1900 * 1901 * Umpf. 1902 */ 1903 SET_BCDR(fdc, 1, bp->b_bcount, 0); 1904 1905 (void)fdcpio(fdc,bp->b_cmd, 1906 bp->b_data+fd->skip, 1907 bp->b_bcount); 1908 1909 } 1910 /* formatting */ 1911 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu, 1912 finfo->fd_formb_secshift, 1913 finfo->fd_formb_nsecs, 1914 finfo->fd_formb_gaplen, 1915 finfo->fd_formb_fillbyte, 0)) { 1916 /* controller fell over */ 1917 if (!(fdc->flags & FDC_NODMA)) 1918 isa_dmadone(isa_dmabp(bp), 1919 bp->b_data + fd->skip, 1920 format ? bp->b_bcount : fdblk, 1921 fdc->dmachan); 1922 fdc->retry = 6; 1923 return (retrier(fdc)); 1924 } 1925 } else { 1926 if (fdc->flags & FDC_NODMA) { 1927 /* 1928 * this seems to be necessary even when 1929 * reading data 1930 */ 1931 SET_BCDR(fdc, 1, fdblk, 0); 1932 1933 /* 1934 * perform the write pseudo-DMA before 1935 * the WRITE command is sent 1936 */ 1937 if (!read) 1938 (void)fdcpio(fdc,bp->b_cmd, 1939 bp->b_data+fd->skip, 1940 fdblk); 1941 } 1942 if (fd_cmd(fdc, 9, 1943 (read ? NE7CMD_READ : NE7CMD_WRITE), 1944 head << 2 | fdu, /* head & unit */ 1945 fd->track, /* track */ 1946 head, 1947 sec, /* sector + 1 */ 1948 fd->ft.secsize, /* sector size */ 1949 sectrac, /* sectors/track */ 1950 fd->ft.gap, /* gap size */ 1951 fd->ft.datalen, /* data length */ 1952 0)) { 1953 /* the beast is sleeping again */ 1954 if (!(fdc->flags & FDC_NODMA)) 1955 isa_dmadone(isa_dmabp(bp), 1956 bp->b_data + fd->skip, 1957 format ? bp->b_bcount : fdblk, 1958 fdc->dmachan); 1959 fdc->retry = 6; 1960 return (retrier(fdc)); 1961 } 1962 } 1963 if (fdc->flags & FDC_NODMA) 1964 /* 1965 * if this is a read, then simply await interrupt 1966 * before performing PIO 1967 */ 1968 if (read && !fdcpio(fdc,bp->b_cmd, 1969 bp->b_data+fd->skip,fdblk)) { 1970 callout_reset(&fd->tohandle, hz, 1971 fd_iotimeout, fdc); 1972 return(0); /* will return later */ 1973 } 1974 1975 /* 1976 * write (or format) operation will fall through and 1977 * await completion interrupt 1978 */ 1979 fdc->state = IOCOMPLETE; 1980 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc); 1981 return (0); /* will return later */ 1982 case PIOREAD: 1983 /* 1984 * actually perform the PIO read. The IOCOMPLETE case 1985 * removes the timeout for us. 1986 */ 1987 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk); 1988 fdc->state = IOCOMPLETE; 1989 /* FALLTHROUGH */ 1990 case IOCOMPLETE: /* IO DONE, post-analyze */ 1991 callout_stop(&fd->tohandle); 1992 1993 if (fd_read_status(fdc, fd->fdsu)) { 1994 if (!(fdc->flags & FDC_NODMA)) { 1995 isa_dmadone(isa_dmabp(bp), 1996 bp->b_data + fd->skip, 1997 format ? bp->b_bcount : fdblk, 1998 fdc->dmachan); 1999 } 2000 if (fdc->retry < 6) 2001 fdc->retry = 6; /* force a reset */ 2002 return (retrier(fdc)); 2003 } 2004 2005 fdc->state = IOTIMEDOUT; 2006 2007 /* FALLTHROUGH */ 2008 2009 case IOTIMEDOUT: 2010 if (!(fdc->flags & FDC_NODMA)) { 2011 isa_dmadone(isa_dmabp(bp), 2012 bp->b_data + fd->skip, 2013 format ? bp->b_bcount : fdblk, fdc->dmachan); 2014 } 2015 if (fdc->status[0] & NE7_ST0_IC) { 2016 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2017 && fdc->status[1] & NE7_ST1_OR) { 2018 /* 2019 * DMA overrun. Someone hogged the bus and 2020 * didn't release it in time for the next 2021 * FDC transfer. 2022 * 2023 * We normally restart this without bumping 2024 * the retry counter. However, in case 2025 * something is seriously messed up (like 2026 * broken hardware), we rather limit the 2027 * number of retries so the IO operation 2028 * doesn't block indefinately. 2029 */ 2030 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 2031 fdc->state = SEEKCOMPLETE; 2032 return (1); 2033 } /* else fall through */ 2034 } 2035 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 2036 && fdc->retry < 6) 2037 fdc->retry = 6; /* force a reset */ 2038 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2039 && fdc->status[2] & NE7_ST2_WC 2040 && fdc->retry < 3) 2041 fdc->retry = 3; /* force recalibrate */ 2042 return (retrier(fdc)); 2043 } 2044 /* All OK */ 2045 /* Operation successful, retry DMA overruns again next time. */ 2046 fdc->dma_overruns = 0; 2047 fd->skip += fdblk; 2048 if (!format && fd->skip < bp->b_bcount - bp->b_resid) { 2049 /* set up next transfer */ 2050 fdc->state = DOSEEK; 2051 } else { 2052 /* ALL DONE */ 2053 fd->skip = 0; 2054 fdc->bio = NULL; 2055 #if 0 2056 device_unbusy(fd->dev); 2057 #endif 2058 devstat_end_transaction_buf(&fd->device_stats, bp); 2059 biodone(bio); 2060 fdc->fd = (fd_p) 0; 2061 fdc->fdu = -1; 2062 fdc->state = FINDWORK; 2063 } 2064 return (1); 2065 case RESETCTLR: 2066 fdc_reset(fdc); 2067 fdc->retry++; 2068 fdc->state = RESETCOMPLETE; 2069 return (0); 2070 case RESETCOMPLETE: 2071 /* 2072 * Discard all the results from the reset so that they 2073 * can't cause an unexpected interrupt later. 2074 */ 2075 for (i = 0; i < 4; i++) 2076 (void)fd_sense_int(fdc, &st0, &cyl); 2077 fdc->state = STARTRECAL; 2078 /* Fall through. */ 2079 case STARTRECAL: 2080 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 2081 /* arrgl */ 2082 fdc->retry = 6; 2083 return (retrier(fdc)); 2084 } 2085 fdc->state = RECALWAIT; 2086 return (0); /* will return later */ 2087 case RECALWAIT: 2088 /* allow heads to settle */ 2089 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc); 2090 fdc->state = RECALCOMPLETE; 2091 return (0); /* will return later */ 2092 case RECALCOMPLETE: 2093 do { 2094 /* 2095 * See SEEKCOMPLETE for a comment on this: 2096 */ 2097 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2098 return 0; 2099 if(fdc->fdct == FDC_NE765 2100 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2101 return 0; /* hope for a real intr */ 2102 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2103 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2104 { 2105 if(fdc->retry > 3) 2106 /* 2107 * a recalibrate from beyond cylinder 77 2108 * will "fail" due to the FDC limitations; 2109 * since people used to complain much about 2110 * the failure message, try not logging 2111 * this one if it seems to be the first 2112 * time in a line 2113 */ 2114 kprintf("fd%d: recal failed ST0 %b cyl %d\n", 2115 fdu, st0, NE7_ST0BITS, cyl); 2116 if(fdc->retry < 3) fdc->retry = 3; 2117 return (retrier(fdc)); 2118 } 2119 fd->track = 0; 2120 /* Seek (probably) necessary */ 2121 fdc->state = DOSEEK; 2122 return (1); /* will return immediatly */ 2123 case MOTORWAIT: 2124 if(fd->flags & FD_MOTOR_WAIT) 2125 { 2126 return (0); /* time's not up yet */ 2127 } 2128 if (fdc->flags & FDC_NEEDS_RESET) { 2129 fdc->state = RESETCTLR; 2130 fdc->flags &= ~FDC_NEEDS_RESET; 2131 } else { 2132 /* 2133 * If all motors were off, then the controller was 2134 * reset, so it has lost track of the current 2135 * cylinder. Recalibrate to handle this case. 2136 * But first, discard the results of the reset. 2137 */ 2138 fdc->state = RESETCOMPLETE; 2139 } 2140 return (1); /* will return immediatly */ 2141 default: 2142 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2143 if (fd_read_status(fdc, fd->fdsu) == 0) 2144 kprintf("FDC status :%x %x %x %x %x %x %x ", 2145 fdc->status[0], 2146 fdc->status[1], 2147 fdc->status[2], 2148 fdc->status[3], 2149 fdc->status[4], 2150 fdc->status[5], 2151 fdc->status[6] ); 2152 else 2153 kprintf("No status available "); 2154 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2155 { 2156 kprintf("[controller is dead now]\n"); 2157 return (0); 2158 } 2159 kprintf("ST0 = %x, PCN = %x\n", st0, cyl); 2160 return (0); 2161 } 2162 /*XXX confusing: some branches return immediately, others end up here*/ 2163 return (1); /* Come back immediatly to new state */ 2164 } 2165 2166 static int 2167 retrier(struct fdc_data *fdc) 2168 { 2169 struct bio *bio; 2170 struct buf *bp; 2171 struct fd_data *fd; 2172 cdev_t dev; 2173 int fdu; 2174 2175 bio = fdc->bio; 2176 bp = bio->bio_buf; 2177 dev = bio->bio_driver_info; 2178 2179 /* XXX shouldn't this be cached somewhere? */ 2180 fdu = dkunit(dev); 2181 fd = devclass_get_softc(fd_devclass, fdu); 2182 if (fd->options & FDOPT_NORETRY) 2183 goto fail; 2184 2185 switch (fdc->retry) { 2186 case 0: case 1: case 2: 2187 fdc->state = SEEKCOMPLETE; 2188 break; 2189 case 3: case 4: case 5: 2190 fdc->state = STARTRECAL; 2191 break; 2192 case 6: 2193 fdc->state = RESETCTLR; 2194 break; 2195 case 7: 2196 break; 2197 default: 2198 fail: 2199 { 2200 int printerror = (fd->options & FDOPT_NOERRLOG) == 0; 2201 2202 if (printerror) { 2203 /* 2204 * note: use the correct device for more 2205 * verbose error reporting. 2206 */ 2207 diskerr(bio, dev, 2208 "hard error", LOG_PRINTF, 2209 fdc->fd->skip); 2210 } 2211 if (printerror) { 2212 if (fdc->flags & FDC_STAT_VALID) 2213 kprintf( 2214 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2215 fdc->status[0], NE7_ST0BITS, 2216 fdc->status[1], NE7_ST1BITS, 2217 fdc->status[2], NE7_ST2BITS, 2218 fdc->status[3], fdc->status[4], 2219 fdc->status[5]); 2220 else 2221 kprintf(" (No status)\n"); 2222 } 2223 } 2224 bp->b_flags |= B_ERROR; 2225 bp->b_error = EIO; 2226 bp->b_resid += bp->b_bcount - fdc->fd->skip; 2227 fdc->bio = NULL; 2228 fdc->fd->skip = 0; 2229 #if 0 2230 device_unbusy(fd->dev); 2231 #endif 2232 devstat_end_transaction_buf(&fdc->fd->device_stats, bp); 2233 biodone(bio); 2234 fdc->state = FINDWORK; 2235 fdc->flags |= FDC_NEEDS_RESET; 2236 fdc->fd = (fd_p) 0; 2237 fdc->fdu = -1; 2238 return (1); 2239 } 2240 fdc->retry++; 2241 return (1); 2242 } 2243 2244 static int 2245 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred) 2246 { 2247 fdu_t fdu; 2248 fd_p fd; 2249 struct buf *bp; 2250 int rv = 0; 2251 size_t fdblk; 2252 2253 fdu = dkunit(dev); 2254 fd = devclass_get_softc(fd_devclass, fdu); 2255 fdblk = 128 << fd->ft.secsize; 2256 2257 /* set up a buffer header for fdstrategy() */ 2258 bp = getpbuf(NULL); 2259 bp->b_cmd = BUF_CMD_FORMAT; 2260 2261 /* 2262 * calculate a fake blkno, so fdstrategy() would initiate a 2263 * seek to the requested cylinder 2264 */ 2265 bp->b_bio1.bio_offset = (off_t)(finfo->cyl * 2266 (fd->ft.sectrac * fd->ft.heads) 2267 + finfo->head * fd->ft.sectrac) * fdblk; 2268 bp->b_bio1.bio_driver_info = dev; 2269 bp->b_bio1.bio_flags |= BIO_SYNC; 2270 bp->b_bio1.bio_done = biodone_sync; 2271 2272 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; 2273 bp->b_data = (caddr_t)finfo; 2274 2275 /* now do the format */ 2276 dev_dstrategy(dev, &bp->b_bio1); 2277 2278 /* ...and wait for it to complete */ 2279 rv = biowait_timeout(&bp->b_bio1, "fdform", 20 * hz); 2280 if (rv == EWOULDBLOCK) { 2281 /* timed out */ 2282 rv = EIO; 2283 #if 0 2284 device_unbusy(fd->dev); 2285 #endif 2286 biodone(&bp->b_bio1); 2287 } 2288 if (bp->b_flags & B_ERROR) 2289 rv = bp->b_error; 2290 /* 2291 * allow the process to be swapped 2292 */ 2293 relpbuf(bp, NULL); 2294 return rv; 2295 } 2296 2297 /* 2298 * TODO: don't allocate buffer on stack. 2299 */ 2300 2301 static int 2302 fdioctl(struct dev_ioctl_args *ap) 2303 { 2304 cdev_t dev = ap->a_head.a_dev; 2305 fdu_t fdu = dkunit(dev); 2306 fd_p fd = devclass_get_softc(fd_devclass, fdu); 2307 struct fdc_status *fsp; 2308 int error = 0; 2309 2310 switch (ap->a_cmd) { 2311 case FD_FORM: 2312 if ((ap->a_fflag & FWRITE) == 0) 2313 error = EBADF; /* must be opened for writing */ 2314 else if (((struct fd_formb *)ap->a_data)->format_version != 2315 FD_FORMAT_VERSION) 2316 error = EINVAL; /* wrong version of formatting prog */ 2317 else 2318 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred); 2319 break; 2320 2321 case FD_GTYPE: /* get drive type */ 2322 *(struct fd_type *)ap->a_data = fd->ft; 2323 break; 2324 2325 case FD_STYPE: /* set drive type */ 2326 /* this is considered harmful; only allow for superuser */ 2327 if (priv_check_cred(ap->a_cred, PRIV_ROOT, 0) != 0) 2328 return EPERM; 2329 fd->ft = *(struct fd_type *)ap->a_data; 2330 break; 2331 2332 case FD_GOPTS: /* get drive options */ 2333 *(int *)ap->a_data = fd->options; 2334 break; 2335 2336 case FD_SOPTS: /* set drive options */ 2337 fd->options = *(int *)ap->a_data; 2338 break; 2339 2340 case FD_GSTAT: 2341 fsp = (struct fdc_status *)ap->a_data; 2342 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2343 return EINVAL; 2344 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2345 break; 2346 2347 default: 2348 error = ENOTTY; 2349 break; 2350 } 2351 return (error); 2352 } 2353