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/bootmaj.h> 62 #include <sys/kernel.h> 63 #include <sys/buf.h> 64 #include <sys/bus.h> 65 #include <sys/conf.h> 66 #include <sys/diskslice.h> 67 #include <sys/disk.h> 68 #include <sys/devicestat.h> 69 #include <sys/fcntl.h> 70 #include <sys/malloc.h> 71 #include <sys/module.h> 72 #include <sys/proc.h> 73 #include <sys/priv.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/inttypes.h> 83 #include <machine/ioctl_fd.h> 84 #include <machine/stdarg.h> 85 86 #include <bus/isa/isavar.h> 87 #include <bus/isa/isareg.h> 88 #include "fdreg.h" 89 #include "fdc.h" 90 #include <bus/isa/rtc.h> 91 92 /* configuration flags */ 93 #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */ 94 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ 95 96 /* internally used only, not really from CMOS: */ 97 #define RTCFDT_144M_PRETENDED 0x1000 98 99 /* error returns for fd_cmd() */ 100 #define FD_FAILED -1 101 #define FD_NOT_VALID -2 102 #define FDC_ERRMAX 100 /* do not log more */ 103 /* 104 * Stop retrying after this many DMA overruns. Since each retry takes 105 * one revolution, with 300 rpm., 25 retries take approximately 10 106 * seconds which the read attempt will block in case the DMA overrun 107 * is persistent. 108 */ 109 #define FDC_DMAOV_MAX 25 110 111 /* 112 * Timeout value for the PIO loops to wait until the FDC main status 113 * register matches our expectations (request for master, direction 114 * bit). This is supposed to be a number of microseconds, although 115 * timing might actually not be very accurate. 116 * 117 * Timeouts of 100 msec are believed to be required for some broken 118 * (old) hardware. 119 */ 120 #define FDSTS_TIMEOUT 100000 121 122 #define NUMTYPES 17 123 #define NUMDENS (NUMTYPES - 7) 124 125 /* These defines (-1) must match index for fd_types */ 126 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */ 127 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */ 128 #define FD_1720 1 129 #define FD_1480 2 130 #define FD_1440 3 131 #define FD_1200 4 132 #define FD_820 5 133 #define FD_800 6 134 #define FD_720 7 135 #define FD_360 8 136 #define FD_640 9 137 #define FD_1232 10 138 139 #define FD_1480in5_25 11 140 #define FD_1440in5_25 12 141 #define FD_820in5_25 13 142 #define FD_800in5_25 14 143 #define FD_720in5_25 15 144 #define FD_360in5_25 16 145 #define FD_640in5_25 17 146 147 148 static struct fd_type fd_types[NUMTYPES] = 149 { 150 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */ 151 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */ 152 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */ 153 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */ 154 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */ 155 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */ 156 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */ 157 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */ 158 { 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */ 159 { 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */ 160 161 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */ 162 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */ 163 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */ 164 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */ 165 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */ 166 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */ 167 { 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */ 168 }; 169 170 #define DRVS_PER_CTLR 2 /* 2 floppies */ 171 172 /***********************************************************************\ 173 * Per controller structure. * 174 \***********************************************************************/ 175 devclass_t fdc_devclass; 176 177 /***********************************************************************\ 178 * Per drive structure. * 179 * N per controller (DRVS_PER_CTLR) * 180 \***********************************************************************/ 181 struct fd_data { 182 struct fdc_data *fdc; /* pointer to controller structure */ 183 int fdsu; /* this units number on this controller */ 184 int type; /* Drive type (FD_1440...) */ 185 struct fd_type ft; /* the type descriptor */ 186 int flags; 187 #define FD_OPEN 0x01 /* it's open */ 188 #define FD_ACTIVE 0x02 /* it's active */ 189 #define FD_MOTOR 0x04 /* motor should be on */ 190 #define FD_MOTOR_WAIT 0x08 /* motor coming up */ 191 int skip; 192 int hddrv; 193 #define FD_NO_TRACK -2 194 int track; /* where we think the head is */ 195 int options; /* user configurable options, see ioctl_fd.h */ 196 struct callout toffhandle; 197 struct callout tohandle; 198 struct callout motor; 199 struct disk disk; 200 struct devstat device_stats; 201 device_t dev; 202 fdu_t fdu; 203 }; 204 205 struct fdc_ivars { 206 int fdunit; 207 }; 208 static devclass_t fd_devclass; 209 210 /***********************************************************************\ 211 * Throughout this file the following conventions will be used: * 212 * fd is a pointer to the fd_data struct for the drive in question * 213 * fdc is a pointer to the fdc_data struct for the controller * 214 * fdu is the floppy drive unit number * 215 * fdcu is the floppy controller unit number * 216 * fdsu is the floppy drive unit number on that controller. (sub-unit) * 217 \***********************************************************************/ 218 219 /* internal functions */ 220 static void fdc_intr(void *); 221 static void set_motor(struct fdc_data *, int, int); 222 # define TURNON 1 223 # define TURNOFF 0 224 static timeout_t fd_turnoff; 225 static timeout_t fd_motor_on; 226 static void fd_turnon(struct fd_data *); 227 static void fdc_reset(fdc_p); 228 static int fd_in(struct fdc_data *, int *); 229 static int out_fdc(struct fdc_data *, int); 230 static void fdstart(struct fdc_data *); 231 static timeout_t fd_iotimeout; 232 static timeout_t fd_pseudointr; 233 static int fdstate(struct fdc_data *); 234 static int retrier(struct fdc_data *); 235 static int fdformat(cdev_t, struct fd_formb *, struct ucred *); 236 237 static int enable_fifo(fdc_p fdc); 238 239 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 240 241 242 #define DEVIDLE 0 243 #define FINDWORK 1 244 #define DOSEEK 2 245 #define SEEKCOMPLETE 3 246 #define IOCOMPLETE 4 247 #define RECALCOMPLETE 5 248 #define STARTRECAL 6 249 #define RESETCTLR 7 250 #define SEEKWAIT 8 251 #define RECALWAIT 9 252 #define MOTORWAIT 10 253 #define IOTIMEDOUT 11 254 #define RESETCOMPLETE 12 255 #define PIOREAD 13 256 257 #ifdef FDC_DEBUG 258 static char const * const fdstates[] = 259 { 260 "DEVIDLE", 261 "FINDWORK", 262 "DOSEEK", 263 "SEEKCOMPLETE", 264 "IOCOMPLETE", 265 "RECALCOMPLETE", 266 "STARTRECAL", 267 "RESETCTLR", 268 "SEEKWAIT", 269 "RECALWAIT", 270 "MOTORWAIT", 271 "IOTIMEDOUT", 272 "RESETCOMPLETE", 273 "PIOREAD", 274 }; 275 276 /* CAUTION: fd_debug causes huge amounts of logging output */ 277 static int volatile fd_debug = 0; 278 #define TRACE0(arg) if(fd_debug) kprintf(arg) 279 #define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2) 280 #else /* FDC_DEBUG */ 281 #define TRACE0(arg) 282 #define TRACE1(arg1, arg2) 283 #endif /* FDC_DEBUG */ 284 285 void 286 fdout_wr(fdc_p fdc, u_int8_t v) 287 { 288 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 289 } 290 291 static u_int8_t 292 fdsts_rd(fdc_p fdc) 293 { 294 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 295 } 296 297 static void 298 fddata_wr(fdc_p fdc, u_int8_t v) 299 { 300 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 301 } 302 303 static u_int8_t 304 fddata_rd(fdc_p fdc) 305 { 306 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 307 } 308 309 static void 310 fdctl_wr_isa(fdc_p fdc, u_int8_t v) 311 { 312 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 313 } 314 315 #if 0 316 317 static u_int8_t 318 fdin_rd(fdc_p fdc) 319 { 320 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 321 } 322 323 #endif 324 325 static d_open_t Fdopen; /* NOTE, not fdopen */ 326 static d_close_t fdclose; 327 static d_ioctl_t fdioctl; 328 static d_strategy_t fdstrategy; 329 330 static struct dev_ops fd_ops = { 331 { "fd", FD_CDEV_MAJOR, D_DISK }, 332 .d_open = Fdopen, 333 .d_close = fdclose, 334 .d_read = physread, 335 .d_write = physwrite, 336 .d_ioctl = fdioctl, 337 .d_strategy = fdstrategy, 338 }; 339 340 static int 341 fdc_err(struct fdc_data *fdc, const char *s) 342 { 343 fdc->fdc_errs++; 344 if (s) { 345 if (fdc->fdc_errs < FDC_ERRMAX) 346 device_printf(fdc->fdc_dev, "%s", s); 347 else if (fdc->fdc_errs == FDC_ERRMAX) 348 device_printf(fdc->fdc_dev, "too many errors, not " 349 "logging any more\n"); 350 } 351 352 return FD_FAILED; 353 } 354 355 /* 356 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 357 * Unit number, 358 * # of output bytes, output bytes as ints ..., 359 * # of input bytes, input bytes as ints ... 360 */ 361 int 362 fd_cmd(struct fdc_data *fdc, int n_out, ...) 363 { 364 u_char cmd; 365 int n_in; 366 int n; 367 __va_list ap; 368 369 __va_start(ap, n_out); 370 cmd = (u_char)(__va_arg(ap, int)); 371 __va_end(ap); 372 __va_start(ap, n_out); 373 for (n = 0; n < n_out; n++) 374 { 375 if (out_fdc(fdc, __va_arg(ap, int)) < 0) 376 { 377 char msg[50]; 378 ksnprintf(msg, sizeof(msg), 379 "cmd %x failed at out byte %d of %d\n", 380 cmd, n + 1, n_out); 381 return fdc_err(fdc, msg); 382 } 383 } 384 n_in = __va_arg(ap, int); 385 for (n = 0; n < n_in; n++) 386 { 387 int *ptr = __va_arg(ap, int *); 388 if (fd_in(fdc, ptr) < 0) 389 { 390 char msg[50]; 391 ksnprintf(msg, sizeof(msg), 392 "cmd %02x failed at in byte %d of %d\n", 393 cmd, n + 1, n_in); 394 return fdc_err(fdc, msg); 395 } 396 } 397 398 return 0; 399 } 400 401 static int 402 enable_fifo(fdc_p fdc) 403 { 404 int i, j; 405 406 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 407 408 /* 409 * XXX: 410 * Cannot use fd_cmd the normal way here, since 411 * this might be an invalid command. Thus we send the 412 * first byte, and check for an early turn of data directon. 413 */ 414 415 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 416 return fdc_err(fdc, "Enable FIFO failed\n"); 417 418 /* If command is invalid, return */ 419 j = FDSTS_TIMEOUT; 420 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 421 != NE7_RQM && j-- > 0) { 422 if (i == (NE7_DIO | NE7_RQM)) { 423 fdc_reset(fdc); 424 return FD_FAILED; 425 } 426 DELAY(1); 427 } 428 if (j<0 || 429 fd_cmd(fdc, 3, 430 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 431 fdc_reset(fdc); 432 return fdc_err(fdc, "Enable FIFO failed\n"); 433 } 434 fdc->flags |= FDC_HAS_FIFO; 435 return 0; 436 } 437 if (fd_cmd(fdc, 4, 438 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 439 return fdc_err(fdc, "Re-enable FIFO failed\n"); 440 return 0; 441 } 442 443 static int 444 fd_sense_drive_status(fdc_p fdc, int *st3p) 445 { 446 int st3; 447 448 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 449 { 450 return fdc_err(fdc, "Sense Drive Status failed\n"); 451 } 452 if (st3p) 453 *st3p = st3; 454 455 return 0; 456 } 457 458 static int 459 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 460 { 461 int cyl, st0, ret; 462 463 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 464 if (ret) { 465 (void)fdc_err(fdc, 466 "sense intr err reading stat reg 0\n"); 467 return ret; 468 } 469 470 if (st0p) 471 *st0p = st0; 472 473 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 474 /* 475 * There doesn't seem to have been an interrupt. 476 */ 477 return FD_NOT_VALID; 478 } 479 480 if (fd_in(fdc, &cyl) < 0) { 481 return fdc_err(fdc, "can't get cyl num\n"); 482 } 483 484 if (cylp) 485 *cylp = cyl; 486 487 return 0; 488 } 489 490 491 static int 492 fd_read_status(fdc_p fdc, int fdsu) 493 { 494 int i, ret; 495 496 for (i = 0; i < 7; i++) { 497 /* 498 * XXX types are poorly chosen. Only bytes can by read 499 * from the hardware, but fdc->status[] wants u_ints and 500 * fd_in() gives ints. 501 */ 502 int status; 503 504 ret = fd_in(fdc, &status); 505 fdc->status[i] = status; 506 if (ret != 0) 507 break; 508 } 509 510 if (ret == 0) 511 fdc->flags |= FDC_STAT_VALID; 512 else 513 fdc->flags &= ~FDC_STAT_VALID; 514 515 return ret; 516 } 517 518 /****************************************************************************/ 519 /* autoconfiguration stuff */ 520 /****************************************************************************/ 521 522 int 523 fdc_alloc_resources(struct fdc_data *fdc) 524 { 525 device_t dev; 526 int ispnp, ispcmcia; 527 528 dev = fdc->fdc_dev; 529 ispnp = (fdc->flags & FDC_ISPNP) != 0; 530 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 531 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 532 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 533 534 /* 535 * On standard ISA, we don't just use an 8 port range 536 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 537 * register at 0x3f6. 538 * 539 * Isn't PC hardware wonderful. 540 * 541 * The Y-E Data PCMCIA FDC doesn't have this problem, it 542 * uses the register with offset 6 for pseudo-DMA, and the 543 * one with offset 7 as control register. 544 */ 545 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 546 &fdc->rid_ioport, 0ul, ~0ul, 547 ispcmcia ? 8 : (ispnp ? 1 : 6), 548 RF_ACTIVE); 549 if (fdc->res_ioport == 0) { 550 device_printf(dev, "cannot reserve I/O port range\n"); 551 return ENXIO; 552 } 553 fdc->portt = rman_get_bustag(fdc->res_ioport); 554 fdc->porth = rman_get_bushandle(fdc->res_ioport); 555 556 if (!ispcmcia) { 557 /* 558 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 559 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 560 * by checking the size and adjust the port address 561 * accordingly. 562 */ 563 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 564 fdc->port_off = -2; 565 566 /* 567 * Register the control port range as rid 1 if it 568 * isn't there already. Most PnP BIOSen will have 569 * already done this but non-PnP configurations don't. 570 * 571 * And some (!!) report 0x3f2-0x3f5 and completely 572 * leave out the control register! It seems that some 573 * non-antique controller chips have a different 574 * method of programming the transfer speed which 575 * doesn't require the control register, but it's 576 * mighty bogus as the chip still responds to the 577 * address for the control register. 578 */ 579 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 580 u_long ctlstart; 581 582 /* Find the control port, usually 0x3f7 */ 583 ctlstart = rman_get_start(fdc->res_ioport) + 584 fdc->port_off + 7; 585 586 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1, 587 -1); 588 } 589 590 /* 591 * Now (finally!) allocate the control port. 592 */ 593 fdc->rid_ctl = 1; 594 fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT, 595 &fdc->rid_ctl, 596 0ul, ~0ul, 1, RF_ACTIVE); 597 if (fdc->res_ctl == 0) { 598 device_printf(dev, 599 "cannot reserve control I/O port range\n"); 600 return ENXIO; 601 } 602 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 603 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 604 } 605 606 fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, 607 &fdc->rid_irq, 0ul, ~0ul, 1, 608 RF_ACTIVE); 609 if (fdc->res_irq == 0) { 610 device_printf(dev, "cannot reserve interrupt line\n"); 611 return ENXIO; 612 } 613 614 if ((fdc->flags & FDC_NODMA) == 0) { 615 fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, 616 &fdc->rid_drq, 0ul, ~0ul, 1, 617 RF_ACTIVE); 618 if (fdc->res_drq == 0) { 619 device_printf(dev, "cannot reserve DMA request line\n"); 620 return ENXIO; 621 } 622 fdc->dmachan = fdc->res_drq->r_start; 623 } 624 625 return 0; 626 } 627 628 void 629 fdc_release_resources(struct fdc_data *fdc) 630 { 631 device_t dev; 632 633 dev = fdc->fdc_dev; 634 if (fdc->res_irq != 0) { 635 bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 636 fdc->res_irq); 637 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 638 fdc->res_irq); 639 } 640 if (fdc->res_ctl != 0) { 641 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 642 fdc->res_ctl); 643 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 644 fdc->res_ctl); 645 } 646 if (fdc->res_ioport != 0) { 647 bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 648 fdc->res_ioport); 649 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 650 fdc->res_ioport); 651 } 652 if (fdc->res_drq != 0) { 653 bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 654 fdc->res_drq); 655 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 656 fdc->res_drq); 657 } 658 } 659 660 /****************************************************************************/ 661 /* autoconfiguration stuff */ 662 /****************************************************************************/ 663 664 static struct isa_pnp_id fdc_ids[] = { 665 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 666 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 667 {0} 668 }; 669 670 int 671 fdc_read_ivar(device_t dev, device_t child, int which, u_long *result) 672 { 673 struct fdc_ivars *ivars = device_get_ivars(child); 674 675 switch (which) { 676 case FDC_IVAR_FDUNIT: 677 *result = ivars->fdunit; 678 break; 679 default: 680 return ENOENT; 681 } 682 return 0; 683 } 684 685 /* 686 * fdc controller section. 687 */ 688 static int 689 fdc_probe(device_t dev) 690 { 691 int error, ic_type; 692 struct fdc_data *fdc; 693 694 fdc = device_get_softc(dev); 695 bzero(fdc, sizeof *fdc); 696 fdc->fdc_dev = dev; 697 fdc->fdctl_wr = fdctl_wr_isa; 698 699 /* Check pnp ids */ 700 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 701 if (error == ENXIO) 702 return ENXIO; 703 if (error == 0) 704 fdc->flags |= FDC_ISPNP; 705 706 /* Attempt to allocate our resources for the duration of the probe */ 707 error = fdc_alloc_resources(fdc); 708 if (error) 709 goto out; 710 711 /* First - lets reset the floppy controller */ 712 fdout_wr(fdc, 0); 713 DELAY(100); 714 fdout_wr(fdc, FDO_FRST); 715 716 /* see if it can handle a command */ 717 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 718 NE7_SPEC_2(2, 0), 0)) { 719 error = ENXIO; 720 goto out; 721 } 722 723 if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { 724 ic_type = (u_char)ic_type; 725 switch (ic_type) { 726 case 0x80: 727 device_set_desc(dev, "NEC 765 or clone"); 728 fdc->fdct = FDC_NE765; 729 break; 730 case 0x81: 731 device_set_desc(dev, "Intel 82077 or clone"); 732 fdc->fdct = FDC_I82077; 733 break; 734 case 0x90: 735 device_set_desc(dev, "NEC 72065B or clone"); 736 fdc->fdct = FDC_NE72065; 737 break; 738 default: 739 device_set_desc(dev, "generic floppy controller"); 740 fdc->fdct = FDC_UNKNOWN; 741 break; 742 } 743 } 744 745 out: 746 fdc_release_resources(fdc); 747 return (error); 748 } 749 750 /* 751 * Add a child device to the fdc controller. It will then be probed etc. 752 */ 753 static void 754 fdc_add_child(device_t dev, const char *name, int unit) 755 { 756 int disabled; 757 struct fdc_ivars *ivar; 758 device_t child; 759 760 ivar = kmalloc(sizeof *ivar, M_DEVBUF /* XXX */, M_WAITOK | M_ZERO); 761 if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0) 762 ivar->fdunit = 0; 763 child = device_add_child(dev, name, unit); 764 if (child == NULL) 765 return; 766 device_set_ivars(child, ivar); 767 if (resource_int_value(name, unit, "disabled", &disabled) == 0 768 && disabled != 0) 769 device_disable(child); 770 } 771 772 int 773 fdc_attach(device_t dev) 774 { 775 struct fdc_data *fdc; 776 int i, error; 777 778 fdc = device_get_softc(dev); 779 780 callout_init(&fdc->pseudointr_ch); 781 782 error = fdc_alloc_resources(fdc); 783 if (error) { 784 device_printf(dev, "cannot reacquire resources\n"); 785 return error; 786 } 787 error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq, 788 0, fdc_intr, fdc, 789 &fdc->fdc_intr, NULL); 790 if (error) { 791 device_printf(dev, "cannot setup interrupt\n"); 792 return error; 793 } 794 fdc->fdcu = device_get_unit(dev); 795 fdc->flags |= FDC_ATTACHED; 796 797 if ((fdc->flags & FDC_NODMA) == 0) { 798 /* Acquire the DMA channel forever, The driver will do the rest */ 799 /* XXX should integrate with rman */ 800 isa_dma_acquire(fdc->dmachan); 801 isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */); 802 } 803 fdc->state = DEVIDLE; 804 805 /* reset controller, turn motor off, clear fdout mirror reg */ 806 fdout_wr(fdc, ((fdc->fdout = 0))); 807 bioq_init(&fdc->bio_queue); 808 809 /* 810 * Probe and attach any children. We should probably detect 811 * devices from the BIOS unless overridden. 812 */ 813 for (i = resource_query_string(-1, "at", device_get_nameunit(dev)); 814 i != -1; 815 i = resource_query_string(i, "at", device_get_nameunit(dev))) 816 fdc_add_child(dev, resource_query_name(i), 817 resource_query_unit(i)); 818 819 return (bus_generic_attach(dev)); 820 } 821 822 int 823 fdc_print_child(device_t me, device_t child) 824 { 825 int retval = 0; 826 827 retval += bus_print_child_header(me, child); 828 retval += kprintf(" on %s drive %d\n", device_get_nameunit(me), 829 fdc_get_fdunit(child)); 830 831 return (retval); 832 } 833 834 static device_method_t fdc_methods[] = { 835 /* Device interface */ 836 DEVMETHOD(device_probe, fdc_probe), 837 DEVMETHOD(device_attach, fdc_attach), 838 DEVMETHOD(device_detach, bus_generic_detach), 839 DEVMETHOD(device_shutdown, bus_generic_shutdown), 840 DEVMETHOD(device_suspend, bus_generic_suspend), 841 DEVMETHOD(device_resume, bus_generic_resume), 842 843 /* Bus interface */ 844 DEVMETHOD(bus_print_child, fdc_print_child), 845 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 846 /* Our children never use any other bus interface methods. */ 847 848 { 0, 0 } 849 }; 850 851 static driver_t fdc_driver = { 852 "fdc", 853 fdc_methods, 854 sizeof(struct fdc_data) 855 }; 856 857 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, NULL, NULL); 858 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, NULL, NULL); 859 860 /******************************************************************/ 861 /* 862 * devices attached to the controller section. 863 */ 864 static int 865 fd_probe(device_t dev) 866 { 867 int i; 868 u_int fdt, st0, st3; 869 struct fd_data *fd; 870 struct fdc_data *fdc; 871 fdsu_t fdsu; 872 static int fd_fifo = 0; 873 874 fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */ 875 fd = device_get_softc(dev); 876 fdc = device_get_softc(device_get_parent(dev)); 877 878 bzero(fd, sizeof *fd); 879 fd->dev = dev; 880 fd->fdc = fdc; 881 fd->fdsu = fdsu; 882 fd->fdu = device_get_unit(dev); 883 884 #ifdef __i386__ 885 /* look up what bios thinks we have */ 886 switch (fd->fdu) { 887 case 0: 888 if ((fdc->flags & FDC_ISPCMCIA)) 889 fdt = RTCFDT_144M; 890 else if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0) 891 fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED; 892 else 893 fdt = (rtcin(RTC_FDISKETTE) & 0xf0); 894 break; 895 case 1: 896 fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0); 897 break; 898 default: 899 fdt = RTCFDT_NONE; 900 break; 901 } 902 #else 903 fdt = RTCFDT_144M; /* XXX probably */ 904 #endif 905 906 /* is there a unit? */ 907 if (fdt == RTCFDT_NONE) 908 return (ENXIO); 909 910 /* select it */ 911 set_motor(fdc, fdsu, TURNON); 912 DELAY(1000000); /* 1 sec */ 913 914 /* XXX This doesn't work before the first set_motor() */ 915 if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN 916 && (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 917 && enable_fifo(fdc) == 0) { 918 device_printf(device_get_parent(dev), 919 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 920 } 921 fd_fifo = 1; 922 923 if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) 924 && (st3 & NE7_ST3_T0)) { 925 /* if at track 0, first seek inwards */ 926 /* seek some steps: */ 927 fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0); 928 DELAY(300000); /* ...wait a moment... */ 929 fd_sense_int(fdc, 0, 0); /* make ctrlr happy */ 930 } 931 932 /* If we're at track 0 first seek inwards. */ 933 if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) { 934 /* Seek some steps... */ 935 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 936 /* ...wait a moment... */ 937 DELAY(300000); 938 /* make ctrlr happy: */ 939 fd_sense_int(fdc, 0, 0); 940 } 941 } 942 943 for (i = 0; i < 2; i++) { 944 /* 945 * we must recalibrate twice, just in case the 946 * heads have been beyond cylinder 76, since most 947 * FDCs still barf when attempting to recalibrate 948 * more than 77 steps 949 */ 950 /* go back to 0: */ 951 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 952 /* a second being enough for full stroke seek*/ 953 DELAY(i == 0 ? 1000000 : 300000); 954 955 /* anything responding? */ 956 if (fd_sense_int(fdc, &st0, 0) == 0 && 957 (st0 & NE7_ST0_EC) == 0) 958 break; /* already probed succesfully */ 959 } 960 } 961 962 set_motor(fdc, fdsu, TURNOFF); 963 964 if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */ 965 return (ENXIO); 966 967 fd->track = FD_NO_TRACK; 968 fd->fdc = fdc; 969 fd->fdsu = fdsu; 970 fd->options = 0; 971 callout_init(&fd->toffhandle); 972 callout_init(&fd->tohandle); 973 callout_init(&fd->motor); 974 975 switch (fdt) { 976 case RTCFDT_12M: 977 device_set_desc(dev, "1200-KB 5.25\" drive"); 978 fd->type = FD_1200; 979 break; 980 case RTCFDT_144M | RTCFDT_144M_PRETENDED: 981 device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive"); 982 fd->type = FD_1440; 983 break; 984 case RTCFDT_144M: 985 device_set_desc(dev, "1440-KB 3.5\" drive"); 986 fd->type = FD_1440; 987 break; 988 case RTCFDT_288M: 989 case RTCFDT_288M_1: 990 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 991 fd->type = FD_1440; 992 break; 993 case RTCFDT_360K: 994 device_set_desc(dev, "360-KB 5.25\" drive"); 995 fd->type = FD_360; 996 break; 997 case RTCFDT_720K: 998 kprintf("720-KB 3.5\" drive"); 999 fd->type = FD_720; 1000 break; 1001 default: 1002 return (ENXIO); 1003 } 1004 fd->ft = fd_types[fd->type - 1]; 1005 return (0); 1006 } 1007 1008 static int 1009 fd_attach(device_t dev) 1010 { 1011 struct disk_info info; 1012 struct fd_data *fd; 1013 struct fd_type *ft; 1014 1015 fd = device_get_softc(dev); 1016 1017 disk_create(fd->fdu, &fd->disk, &fd_ops); 1018 disk_setdisktype(&fd->disk, "floppy"); 1019 1020 /* 1021 * Make special raw floppy devices with preset types to 1022 * make formatting easier. These override the disk management 1023 * layer for the whole-slice-disk for partitions 128-191. Note 1024 * that we do not override partition 255, which is the 1025 * whole-slice-part. If we did we would have to provide our 1026 * own DIOCGPART ioctl. 1027 */ 1028 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 1), 1029 UID_ROOT, GID_WHEEL, 0600, "fd%d.1720", fd->fdu); 1030 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 2), 1031 UID_ROOT, GID_WHEEL, 0600, "fd%d.1480", fd->fdu); 1032 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 3), 1033 UID_ROOT, GID_WHEEL, 0600, "fd%d.1440", fd->fdu); 1034 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 4), 1035 UID_ROOT, GID_WHEEL, 0600, "fd%d.1200", fd->fdu); 1036 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 5), 1037 UID_ROOT, GID_WHEEL, 0600, "fd%d.820", fd->fdu); 1038 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 6), 1039 UID_ROOT, GID_WHEEL, 0600, "fd%d.800", fd->fdu); 1040 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 7), 1041 UID_ROOT, GID_WHEEL, 0600, "fd%d.720", fd->fdu); 1042 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 8), 1043 UID_ROOT, GID_WHEEL, 0600, "fd%d.360", fd->fdu); 1044 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 9), 1045 UID_ROOT, GID_WHEEL, 0600, "fd%d.640", fd->fdu); 1046 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 10), 1047 UID_ROOT, GID_WHEEL, 0600, "fd%d.1232", fd->fdu); 1048 1049 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1050 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS, 1051 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1052 DEVSTAT_PRIORITY_FD); 1053 1054 if (fd->type != NO_TYPE) { 1055 bzero(&info, sizeof(info)); 1056 ft = &fd_types[fd->type - 1]; 1057 info.d_media_blksize = 128 << ft->secsize; 1058 info.d_media_blocks = ft->size; 1059 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR; 1060 info.d_nheads = ft->heads; 1061 info.d_secpertrack = ft->sectrac; 1062 info.d_secpercyl = ft->sectrac * ft->heads; 1063 info.d_ncylinders = ft->size / info.d_secpercyl; 1064 disk_setdiskinfo(&fd->disk, &info); 1065 } 1066 return (0); 1067 } 1068 1069 static int 1070 fd_detach(device_t dev) 1071 { 1072 struct fd_data *fd; 1073 1074 fd = device_get_softc(dev); 1075 kprintf("devfs: Please make sure that only the right fd device was removed!!!\n"); 1076 dev_ops_remove_minor(&fd_ops, 1077 /*dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),*/ 1078 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128)); 1079 disk_invalidate(&fd->disk); 1080 disk_destroy(&fd->disk); 1081 devstat_remove_entry(&fd->device_stats); 1082 callout_stop(&fd->toffhandle); 1083 callout_stop(&fd->motor); 1084 1085 return (0); 1086 } 1087 1088 static device_method_t fd_methods[] = { 1089 /* Device interface */ 1090 DEVMETHOD(device_probe, fd_probe), 1091 DEVMETHOD(device_attach, fd_attach), 1092 DEVMETHOD(device_detach, fd_detach), 1093 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1094 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1095 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1096 1097 { 0, 0 } 1098 }; 1099 1100 static driver_t fd_driver = { 1101 "fd", 1102 fd_methods, 1103 sizeof(struct fd_data) 1104 }; 1105 1106 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, NULL, NULL); 1107 1108 /****************************************************************************/ 1109 /* motor control stuff */ 1110 /* remember to not deselect the drive we're working on */ 1111 /****************************************************************************/ 1112 static void 1113 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1114 { 1115 int fdout = fdc->fdout; 1116 int needspecify = 0; 1117 1118 if(turnon) { 1119 fdout &= ~FDO_FDSEL; 1120 fdout |= (FDO_MOEN0 << fdsu) + fdsu; 1121 } else 1122 fdout &= ~(FDO_MOEN0 << fdsu); 1123 1124 if(!turnon 1125 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0) 1126 /* gonna turn off the last drive, put FDC to bed */ 1127 fdout &= ~ (FDO_FRST|FDO_FDMAEN); 1128 else { 1129 /* make sure controller is selected and specified */ 1130 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0) 1131 needspecify = 1; 1132 fdout |= (FDO_FRST|FDO_FDMAEN); 1133 } 1134 1135 fdout_wr(fdc, fdout); 1136 fdc->fdout = fdout; 1137 TRACE1("[0x%x->FDOUT]", fdout); 1138 1139 if (needspecify) { 1140 /* 1141 * XXX 1142 * special case: since we have just woken up the FDC 1143 * from its sleep, we silently assume the command will 1144 * be accepted, and do not test for a timeout 1145 */ 1146 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1147 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1148 0); 1149 if (fdc->flags & FDC_HAS_FIFO) 1150 (void) enable_fifo(fdc); 1151 } 1152 } 1153 1154 static void 1155 fd_turnoff(void *xfd) 1156 { 1157 fd_p fd = xfd; 1158 1159 TRACE1("[fd%d: turnoff]", fd->fdu); 1160 1161 crit_enter(); 1162 /* 1163 * Don't turn off the motor yet if the drive is active. 1164 * 1165 * If we got here, this could only mean we missed an interrupt. 1166 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1167 * after a controller reset. Just schedule a pseudo-interrupt 1168 * so the state machine gets re-entered. 1169 */ 1170 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1171 fdc_intr(fd->fdc); 1172 crit_exit(); 1173 return; 1174 } 1175 1176 fd->flags &= ~FD_MOTOR; 1177 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1178 crit_exit(); 1179 } 1180 1181 static void 1182 fd_motor_on(void *xfd) 1183 { 1184 fd_p fd = xfd; 1185 1186 crit_enter(); 1187 fd->flags &= ~FD_MOTOR_WAIT; 1188 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1189 { 1190 fdc_intr(fd->fdc); 1191 } 1192 crit_exit(); 1193 } 1194 1195 static void 1196 fd_turnon(fd_p fd) 1197 { 1198 if(!(fd->flags & FD_MOTOR)) 1199 { 1200 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1201 set_motor(fd->fdc, fd->fdsu, TURNON); 1202 callout_reset(&fd->motor, hz, fd_motor_on, fd); 1203 } 1204 } 1205 1206 static void 1207 fdc_reset(fdc_p fdc) 1208 { 1209 /* Try a reset, keep motor on */ 1210 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1211 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1212 DELAY(100); 1213 /* enable FDC, but defer interrupts a moment */ 1214 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1215 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1216 DELAY(100); 1217 fdout_wr(fdc, fdc->fdout); 1218 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1219 1220 /* XXX after a reset, silently believe the FDC will accept commands */ 1221 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1222 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1223 0); 1224 if (fdc->flags & FDC_HAS_FIFO) 1225 (void) enable_fifo(fdc); 1226 } 1227 1228 /****************************************************************************/ 1229 /* fdc in/out */ 1230 /****************************************************************************/ 1231 /* 1232 * FDC IO functions, take care of the main status register, timeout 1233 * in case the desired status bits are never set. 1234 * 1235 * These PIO loops initially start out with short delays between 1236 * each iteration in the expectation that the required condition 1237 * is usually met quickly, so it can be handled immediately. After 1238 * about 1 ms, stepping is increased to achieve a better timing 1239 * accuracy in the calls to DELAY(). 1240 */ 1241 static int 1242 fd_in(struct fdc_data *fdc, int *ptr) 1243 { 1244 int i, j, step; 1245 1246 for (j = 0, step = 1; 1247 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) && 1248 j < FDSTS_TIMEOUT; 1249 j += step) { 1250 if (i == NE7_RQM) 1251 return (fdc_err(fdc, "ready for output in input\n")); 1252 if (j == 1000) 1253 step = 1000; 1254 DELAY(step); 1255 } 1256 if (j >= FDSTS_TIMEOUT) 1257 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); 1258 #ifdef FDC_DEBUG 1259 i = fddata_rd(fdc); 1260 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1261 *ptr = i; 1262 return (0); 1263 #else /* !FDC_DEBUG */ 1264 i = fddata_rd(fdc); 1265 if (ptr) 1266 *ptr = i; 1267 return (0); 1268 #endif /* FDC_DEBUG */ 1269 } 1270 1271 static int 1272 out_fdc(struct fdc_data *fdc, int x) 1273 { 1274 int i, j, step; 1275 1276 for (j = 0, step = 1; 1277 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM && 1278 j < FDSTS_TIMEOUT; 1279 j += step) { 1280 if (i == (NE7_DIO|NE7_RQM)) 1281 return (fdc_err(fdc, "ready for input in output\n")); 1282 if (j == 1000) 1283 step = 1000; 1284 DELAY(step); 1285 } 1286 if (j >= FDSTS_TIMEOUT) 1287 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); 1288 1289 /* Send the command and return */ 1290 fddata_wr(fdc, x); 1291 TRACE1("[0x%x->FDDATA]", x); 1292 return (0); 1293 } 1294 1295 /****************************************************************************/ 1296 /* fdopen/fdclose */ 1297 /****************************************************************************/ 1298 int 1299 Fdopen(struct dev_open_args *ap) 1300 { 1301 cdev_t dev = ap->a_head.a_dev; 1302 fdu_t fdu = dkunit(dev); 1303 struct disk_info info; 1304 struct fd_type *ft; 1305 int type; 1306 int changetype; 1307 fd_p fd; 1308 fdc_p fdc; 1309 1310 /* check bounds */ 1311 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1312 return (ENXIO); 1313 fdc = fd->fdc; 1314 if ((fdc == NULL) || (fd->type == NO_TYPE)) 1315 return (ENXIO); 1316 1317 /* 1318 * Figure out the type of floppy. There are special whole-disk-device 1319 * overrides that will override the current type. 1320 */ 1321 type = dkpart(dev); 1322 if (type == WHOLE_SLICE_PART) { 1323 type = fd->type; /* do not change selected type data */ 1324 changetype = 0; 1325 } else if (type > 128) { 1326 type -= 128; /* set to specific format */ 1327 changetype = 1; 1328 } else { 1329 type = fd->type; /* reset to default */ 1330 changetype = 1; 1331 } 1332 if (type > NUMDENS) 1333 return (ENXIO); 1334 if (type != fd->type) { 1335 /* 1336 * For each type of basic drive, make sure we are trying 1337 * to open a type it can do, 1338 */ 1339 switch (fd->type) { 1340 case FD_360: 1341 return (ENXIO); 1342 case FD_720: 1343 if ( type != FD_820 1344 && type != FD_800 1345 && type != FD_640 1346 ) 1347 return (ENXIO); 1348 break; 1349 case FD_1200: 1350 switch (type) { 1351 case FD_1480: 1352 type = FD_1480in5_25; 1353 break; 1354 case FD_1440: 1355 type = FD_1440in5_25; 1356 break; 1357 case FD_1232: 1358 break; 1359 case FD_820: 1360 type = FD_820in5_25; 1361 break; 1362 case FD_800: 1363 type = FD_800in5_25; 1364 break; 1365 case FD_720: 1366 type = FD_720in5_25; 1367 break; 1368 case FD_640: 1369 type = FD_640in5_25; 1370 break; 1371 case FD_360: 1372 type = FD_360in5_25; 1373 break; 1374 default: 1375 return(ENXIO); 1376 } 1377 break; 1378 case FD_1440: 1379 if ( type != FD_1720 1380 && type != FD_1480 1381 && type != FD_1200 1382 && type != FD_820 1383 && type != FD_800 1384 && type != FD_720 1385 && type != FD_640 1386 ) 1387 return(ENXIO); 1388 break; 1389 } 1390 } 1391 1392 /* 1393 * fd->type is the basic drive type, not the current format 1394 * we are reading. We only change the type when opening the 1395 * whole-slice-partition 1396 */ 1397 if (changetype) 1398 fd->ft = fd_types[type - 1]; 1399 fd->flags |= FD_OPEN; 1400 1401 /* 1402 * Clearing the DMA overrun counter at open time is a bit messy. 1403 * Since we're only managing one counter per controller, opening 1404 * the second drive could mess it up. Anyway, if the DMA overrun 1405 * condition is really persistent, it will eventually time out 1406 * still. OTOH, clearing it here will ensure we'll at least start 1407 * trying again after a previous (maybe even long ago) failure. 1408 * Also, this is merely a stop-gap measure only that should not 1409 * happen during normal operation, so we can tolerate it to be a 1410 * bit sloppy about this. 1411 */ 1412 fdc->dma_overruns = 0; 1413 1414 /* 1415 * Set disk parameters for the disk management layer. 1416 * 1417 * Note that we do not set RAWEXTENSIONS here. We override 1418 * the minor numbers in the raw-extension range and handle them 1419 * directly. 1420 */ 1421 bzero(&info, sizeof(info)); 1422 ft = &fd->ft; 1423 info.d_media_blksize = 128 << ft->secsize; 1424 info.d_media_blocks = ft->size; 1425 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR; 1426 info.d_nheads = ft->heads; 1427 info.d_secpertrack = ft->sectrac; 1428 info.d_secpercyl = ft->sectrac * ft->heads; 1429 info.d_ncylinders = ft->size / info.d_secpercyl; 1430 disk_setdiskinfo(&fd->disk, &info); 1431 1432 return 0; 1433 } 1434 1435 int 1436 fdclose(struct dev_close_args *ap) 1437 { 1438 cdev_t dev = ap->a_head.a_dev; 1439 fdu_t fdu = dkunit(dev); 1440 struct fd_data *fd; 1441 1442 fd = devclass_get_softc(fd_devclass, fdu); 1443 fd->flags &= ~FD_OPEN; 1444 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG); 1445 1446 return (0); 1447 } 1448 1449 /****************************************************************************/ 1450 /* fdstrategy */ 1451 /****************************************************************************/ 1452 int 1453 fdstrategy(struct dev_strategy_args *ap) 1454 { 1455 cdev_t dev = ap->a_head.a_dev; 1456 struct bio *bio = ap->a_bio; 1457 struct buf *bp = bio->bio_buf; 1458 unsigned nblocks, blknum, cando; 1459 fdu_t fdu; 1460 fdc_p fdc; 1461 fd_p fd; 1462 size_t fdblk; 1463 1464 fdu = dkunit(dev); 1465 fd = devclass_get_softc(fd_devclass, fdu); 1466 if (fd == 0) 1467 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1468 (u_long)major(dev), (u_long)minor(dev)); 1469 fdc = fd->fdc; 1470 if (fd->type == NO_TYPE) { 1471 bp->b_error = ENXIO; 1472 bp->b_flags |= B_ERROR; 1473 goto bad; 1474 }; 1475 1476 fdblk = 128 << (fd->ft.secsize); 1477 if (bp->b_cmd != BUF_CMD_FORMAT) { 1478 if (bio->bio_offset < 0) { 1479 kprintf( 1480 "fd%d: fdstrat: bad request offset = %"PRId64", bcount = %d\n", 1481 fdu, bio->bio_offset, bp->b_bcount); 1482 bp->b_error = EINVAL; 1483 bp->b_flags |= B_ERROR; 1484 goto bad; 1485 } 1486 if ((bp->b_bcount % fdblk) != 0) { 1487 bp->b_error = EINVAL; 1488 bp->b_flags |= B_ERROR; 1489 goto bad; 1490 } 1491 } 1492 1493 /* 1494 * Set up block calculations. 1495 */ 1496 if (bio->bio_offset > 20000000LL * fdblk) { 1497 /* 1498 * Reject unreasonably high block number, prevent the 1499 * multiplication below from overflowing. 1500 */ 1501 bp->b_error = EINVAL; 1502 bp->b_flags |= B_ERROR; 1503 goto bad; 1504 } 1505 blknum = (unsigned)(bio->bio_offset / fdblk); 1506 nblocks = fd->ft.size; 1507 bp->b_resid = 0; 1508 if (blknum + (bp->b_bcount / fdblk) > nblocks) { 1509 if (blknum <= nblocks) { 1510 cando = (nblocks - blknum) * fdblk; 1511 bp->b_resid = bp->b_bcount - cando; 1512 if (cando == 0) 1513 goto bad; /* not actually bad but EOF */ 1514 } else { 1515 bp->b_error = EINVAL; 1516 bp->b_flags |= B_ERROR; 1517 goto bad; 1518 } 1519 } 1520 crit_enter(); 1521 bio->bio_driver_info = dev; 1522 bioqdisksort(&fdc->bio_queue, bio); 1523 callout_stop(&fd->toffhandle); 1524 1525 /* Tell devstat we are starting on the transaction */ 1526 devstat_start_transaction(&fd->device_stats); 1527 #if 0 1528 device_busy(fd->dev); 1529 #endif 1530 fdstart(fdc); 1531 crit_exit(); 1532 return(0); 1533 1534 bad: 1535 biodone(bio); 1536 return(0); 1537 } 1538 1539 /***************************************************************\ 1540 * fdstart * 1541 * We have just queued something.. if the controller is not busy * 1542 * then simulate the case where it has just finished a command * 1543 * So that it (the interrupt routine) looks on the queue for more* 1544 * work to do and picks up what we just added. * 1545 * If the controller is already busy, we need do nothing, as it * 1546 * will pick up our work when the present work completes * 1547 \***************************************************************/ 1548 static void 1549 fdstart(struct fdc_data *fdc) 1550 { 1551 crit_enter(); 1552 if(fdc->state == DEVIDLE) 1553 { 1554 fdc_intr(fdc); 1555 } 1556 crit_exit(); 1557 } 1558 1559 static void 1560 fd_iotimeout(void *xfdc) 1561 { 1562 fdc_p fdc; 1563 1564 fdc = xfdc; 1565 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1566 1567 /* 1568 * Due to IBM's brain-dead design, the FDC has a faked ready 1569 * signal, hardwired to ready == true. Thus, any command 1570 * issued if there's no diskette in the drive will _never_ 1571 * complete, and must be aborted by resetting the FDC. 1572 * Many thanks, Big Blue! 1573 * The FDC must not be reset directly, since that would 1574 * interfere with the state machine. Instead, pretend that 1575 * the command completed but was invalid. The state machine 1576 * will reset the FDC and retry once. 1577 */ 1578 crit_enter(); 1579 fdc->status[0] = NE7_ST0_IC_IV; 1580 fdc->flags &= ~FDC_STAT_VALID; 1581 fdc->state = IOTIMEDOUT; 1582 fdc_intr(fdc); 1583 crit_exit(); 1584 } 1585 1586 /* just ensure it is running in a critical section */ 1587 static void 1588 fd_pseudointr(void *xfdc) 1589 { 1590 crit_enter(); 1591 fdc_intr(xfdc); 1592 crit_exit(); 1593 } 1594 1595 /***********************************************************************\ 1596 * fdintr * 1597 * keep calling the state machine until it returns a 0 * 1598 * ALWAYS called at SPLBIO * 1599 \***********************************************************************/ 1600 static void 1601 fdc_intr(void *xfdc) 1602 { 1603 fdc_p fdc = xfdc; 1604 while(fdstate(fdc)) 1605 ; 1606 } 1607 1608 /* 1609 * magic pseudo-DMA initialization for YE FDC. Sets count and 1610 * direction 1611 */ 1612 #define SET_BCDR(fdc,wr,cnt,port) \ 1613 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1614 ((cnt)-1) & 0xff); \ 1615 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1616 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1617 1618 /* 1619 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy 1620 */ 1621 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count) 1622 { 1623 u_char *cptr = (u_char *)addr; 1624 1625 if (cmd == BUF_CMD_READ) { 1626 if (fdc->state != PIOREAD) { 1627 fdc->state = PIOREAD; 1628 return(0); 1629 }; 1630 SET_BCDR(fdc, 0, count, 0); 1631 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1632 FDC_YE_DATAPORT, cptr, count); 1633 } else { 1634 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1635 FDC_YE_DATAPORT, cptr, count); 1636 SET_BCDR(fdc, 0, count, 0); 1637 }; 1638 return(1); 1639 } 1640 1641 /***********************************************************************\ 1642 * The controller state machine. * 1643 * if it returns a non zero value, it should be called again immediatly * 1644 \***********************************************************************/ 1645 static int 1646 fdstate(fdc_p fdc) 1647 { 1648 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3; 1649 unsigned blknum = 0, b_cylinder = 0; 1650 fdu_t fdu; 1651 fd_p fd; 1652 struct bio *bio; 1653 struct buf *bp; 1654 struct fd_formb *finfo = NULL; 1655 size_t fdblk; 1656 cdev_t dev; 1657 1658 bio = fdc->bio; 1659 if (bio == NULL) { 1660 bio = bioq_first(&fdc->bio_queue); 1661 if (bio != NULL) { 1662 bioq_remove(&fdc->bio_queue, bio); 1663 fdc->bio = bio; 1664 } 1665 } 1666 if (bio == NULL) { 1667 /***********************************************\ 1668 * nothing left for this controller to do * 1669 * Force into the IDLE state, * 1670 \***********************************************/ 1671 fdc->state = DEVIDLE; 1672 if (fdc->fd) { 1673 device_printf(fdc->fdc_dev, 1674 "unexpected valid fd pointer\n"); 1675 fdc->fd = (fd_p) 0; 1676 fdc->fdu = -1; 1677 } 1678 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1679 return (0); 1680 } 1681 bp = bio->bio_buf; 1682 dev = bio->bio_driver_info; 1683 1684 fdu = dkunit(dev); 1685 fd = devclass_get_softc(fd_devclass, fdu); 1686 fdblk = 128 << fd->ft.secsize; 1687 if (fdc->fd && (fd != fdc->fd)) 1688 device_printf(fd->dev, "confused fd pointers\n"); 1689 read = (bp->b_cmd == BUF_CMD_READ); 1690 format = (bp->b_cmd == BUF_CMD_FORMAT); 1691 if (format) { 1692 finfo = (struct fd_formb *)bp->b_data; 1693 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 1694 - (char *)finfo; 1695 } 1696 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) { 1697 blknum = (unsigned)(bio->bio_offset / fdblk) + 1698 fd->skip /fdblk; 1699 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads); 1700 } 1701 TRACE1("fd%d", fdu); 1702 TRACE1("[%s]", fdstates[fdc->state]); 1703 TRACE1("(0x%x)", fd->flags); 1704 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd); 1705 switch (fdc->state) 1706 { 1707 case DEVIDLE: 1708 case FINDWORK: /* we have found new work */ 1709 fdc->retry = 0; 1710 fd->skip = 0; 1711 fdc->fd = fd; 1712 fdc->fdu = fdu; 1713 fdc->fdctl_wr(fdc, fd->ft.trans); 1714 TRACE1("[0x%x->FDCTL]", fd->ft.trans); 1715 /*******************************************************\ 1716 * If the next drive has a motor startup pending, then * 1717 * it will start up in its own good time * 1718 \*******************************************************/ 1719 if(fd->flags & FD_MOTOR_WAIT) { 1720 fdc->state = MOTORWAIT; 1721 return (0); /* come back later */ 1722 } 1723 /*******************************************************\ 1724 * Maybe if it's not starting, it SHOULD be starting * 1725 \*******************************************************/ 1726 if (!(fd->flags & FD_MOTOR)) 1727 { 1728 fdc->state = MOTORWAIT; 1729 fd_turnon(fd); 1730 return (0); 1731 } 1732 else /* at least make sure we are selected */ 1733 { 1734 set_motor(fdc, fd->fdsu, TURNON); 1735 } 1736 if (fdc->flags & FDC_NEEDS_RESET) { 1737 fdc->state = RESETCTLR; 1738 fdc->flags &= ~FDC_NEEDS_RESET; 1739 } else 1740 fdc->state = DOSEEK; 1741 break; 1742 case DOSEEK: 1743 if (b_cylinder == (unsigned)fd->track) 1744 { 1745 fdc->state = SEEKCOMPLETE; 1746 break; 1747 } 1748 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 1749 fd->fdsu, b_cylinder * fd->ft.steptrac, 1750 0)) 1751 { 1752 /* 1753 * seek command not accepted, looks like 1754 * the FDC went off to the Saints... 1755 */ 1756 fdc->retry = 6; /* try a reset */ 1757 return(retrier(fdc)); 1758 } 1759 fd->track = FD_NO_TRACK; 1760 fdc->state = SEEKWAIT; 1761 return(0); /* will return later */ 1762 case SEEKWAIT: 1763 /* allow heads to settle */ 1764 callout_reset(&fdc->pseudointr_ch, hz / 16, 1765 fd_pseudointr, fdc); 1766 fdc->state = SEEKCOMPLETE; 1767 return(0); /* will return later */ 1768 case SEEKCOMPLETE : /* SEEK DONE, START DMA */ 1769 /* Make sure seek really happened*/ 1770 if(fd->track == FD_NO_TRACK) { 1771 int descyl = b_cylinder * fd->ft.steptrac; 1772 do { 1773 /* 1774 * This might be a "ready changed" interrupt, 1775 * which cannot really happen since the 1776 * RDY pin is hardwired to + 5 volts. This 1777 * generally indicates a "bouncing" intr 1778 * line, so do one of the following: 1779 * 1780 * When running on an enhanced FDC that is 1781 * known to not go stuck after responding 1782 * with INVALID, fetch all interrupt states 1783 * until seeing either an INVALID or a 1784 * real interrupt condition. 1785 * 1786 * When running on a dumb old NE765, give 1787 * up immediately. The controller will 1788 * provide up to four dummy RC interrupt 1789 * conditions right after reset (for the 1790 * corresponding four drives), so this is 1791 * our only chance to get notice that it 1792 * was not the FDC that caused the interrupt. 1793 */ 1794 if (fd_sense_int(fdc, &st0, &cyl) 1795 == FD_NOT_VALID) 1796 return 0; 1797 if(fdc->fdct == FDC_NE765 1798 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1799 return 0; /* hope for a real intr */ 1800 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1801 1802 if (0 == descyl) { 1803 int failed = 0; 1804 /* 1805 * seek to cyl 0 requested; make sure we are 1806 * really there 1807 */ 1808 if (fd_sense_drive_status(fdc, &st3)) 1809 failed = 1; 1810 if ((st3 & NE7_ST3_T0) == 0) { 1811 kprintf( 1812 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 1813 fdu, st3, NE7_ST3BITS); 1814 failed = 1; 1815 } 1816 1817 if (failed) { 1818 if(fdc->retry < 3) 1819 fdc->retry = 3; 1820 return (retrier(fdc)); 1821 } 1822 } 1823 1824 if (cyl != descyl) { 1825 kprintf( 1826 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 1827 fdu, descyl, cyl, st0); 1828 if (fdc->retry < 3) 1829 fdc->retry = 3; 1830 return (retrier(fdc)); 1831 } 1832 } 1833 1834 fd->track = b_cylinder; 1835 if (!(fdc->flags & FDC_NODMA)) { 1836 isa_dmastart(isa_dmabp(bp), 1837 bp->b_data+fd->skip, 1838 format ? bp->b_bcount : fdblk, fdc->dmachan); 1839 } 1840 sectrac = fd->ft.sectrac; 1841 sec = blknum % (sectrac * fd->ft.heads); 1842 head = sec / sectrac; 1843 sec = sec % sectrac + 1; 1844 fd->hddrv = ((head&1)<<2)+fdu; 1845 1846 if(format || !read) 1847 { 1848 /* make sure the drive is writable */ 1849 if(fd_sense_drive_status(fdc, &st3) != 0) 1850 { 1851 /* stuck controller? */ 1852 if (!(fdc->flags & FDC_NODMA)) 1853 isa_dmadone(isa_dmabp(bp), 1854 bp->b_data + fd->skip, 1855 format ? bp->b_bcount : fdblk, 1856 fdc->dmachan); 1857 fdc->retry = 6; /* reset the beast */ 1858 return (retrier(fdc)); 1859 } 1860 if(st3 & NE7_ST3_WP) 1861 { 1862 /* 1863 * XXX YES! this is ugly. 1864 * in order to force the current operation 1865 * to fail, we will have to fake an FDC 1866 * error - all error handling is done 1867 * by the retrier() 1868 */ 1869 fdc->status[0] = NE7_ST0_IC_AT; 1870 fdc->status[1] = NE7_ST1_NW; 1871 fdc->status[2] = 0; 1872 fdc->status[3] = fd->track; 1873 fdc->status[4] = head; 1874 fdc->status[5] = sec; 1875 fdc->retry = 8; /* break out immediately */ 1876 fdc->state = IOTIMEDOUT; /* not really... */ 1877 return (1); 1878 } 1879 } 1880 1881 if (format) { 1882 if (fdc->flags & FDC_NODMA) { 1883 /* 1884 * This seems to be necessary for 1885 * whatever obscure reason; if we omit 1886 * it, we end up filling the sector ID 1887 * fields of the newly formatted track 1888 * entirely with garbage, causing 1889 * `wrong cylinder' errors all over 1890 * the place when trying to read them 1891 * back. 1892 * 1893 * Umpf. 1894 */ 1895 SET_BCDR(fdc, 1, bp->b_bcount, 0); 1896 1897 (void)fdcpio(fdc,bp->b_cmd, 1898 bp->b_data+fd->skip, 1899 bp->b_bcount); 1900 1901 } 1902 /* formatting */ 1903 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu, 1904 finfo->fd_formb_secshift, 1905 finfo->fd_formb_nsecs, 1906 finfo->fd_formb_gaplen, 1907 finfo->fd_formb_fillbyte, 0)) { 1908 /* controller fell over */ 1909 if (!(fdc->flags & FDC_NODMA)) 1910 isa_dmadone(isa_dmabp(bp), 1911 bp->b_data + fd->skip, 1912 format ? bp->b_bcount : fdblk, 1913 fdc->dmachan); 1914 fdc->retry = 6; 1915 return (retrier(fdc)); 1916 } 1917 } else { 1918 if (fdc->flags & FDC_NODMA) { 1919 /* 1920 * this seems to be necessary even when 1921 * reading data 1922 */ 1923 SET_BCDR(fdc, 1, fdblk, 0); 1924 1925 /* 1926 * perform the write pseudo-DMA before 1927 * the WRITE command is sent 1928 */ 1929 if (!read) 1930 (void)fdcpio(fdc,bp->b_cmd, 1931 bp->b_data+fd->skip, 1932 fdblk); 1933 } 1934 if (fd_cmd(fdc, 9, 1935 (read ? NE7CMD_READ : NE7CMD_WRITE), 1936 head << 2 | fdu, /* head & unit */ 1937 fd->track, /* track */ 1938 head, 1939 sec, /* sector + 1 */ 1940 fd->ft.secsize, /* sector size */ 1941 sectrac, /* sectors/track */ 1942 fd->ft.gap, /* gap size */ 1943 fd->ft.datalen, /* data length */ 1944 0)) { 1945 /* the beast is sleeping again */ 1946 if (!(fdc->flags & FDC_NODMA)) 1947 isa_dmadone(isa_dmabp(bp), 1948 bp->b_data + fd->skip, 1949 format ? bp->b_bcount : fdblk, 1950 fdc->dmachan); 1951 fdc->retry = 6; 1952 return (retrier(fdc)); 1953 } 1954 } 1955 if (fdc->flags & FDC_NODMA) 1956 /* 1957 * if this is a read, then simply await interrupt 1958 * before performing PIO 1959 */ 1960 if (read && !fdcpio(fdc,bp->b_cmd, 1961 bp->b_data+fd->skip,fdblk)) { 1962 callout_reset(&fd->tohandle, hz, 1963 fd_iotimeout, fdc); 1964 return(0); /* will return later */ 1965 }; 1966 1967 /* 1968 * write (or format) operation will fall through and 1969 * await completion interrupt 1970 */ 1971 fdc->state = IOCOMPLETE; 1972 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc); 1973 return (0); /* will return later */ 1974 case PIOREAD: 1975 /* 1976 * actually perform the PIO read. The IOCOMPLETE case 1977 * removes the timeout for us. 1978 */ 1979 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk); 1980 fdc->state = IOCOMPLETE; 1981 /* FALLTHROUGH */ 1982 case IOCOMPLETE: /* IO DONE, post-analyze */ 1983 callout_stop(&fd->tohandle); 1984 1985 if (fd_read_status(fdc, fd->fdsu)) { 1986 if (!(fdc->flags & FDC_NODMA)) { 1987 isa_dmadone(isa_dmabp(bp), 1988 bp->b_data + fd->skip, 1989 format ? bp->b_bcount : fdblk, 1990 fdc->dmachan); 1991 } 1992 if (fdc->retry < 6) 1993 fdc->retry = 6; /* force a reset */ 1994 return (retrier(fdc)); 1995 } 1996 1997 fdc->state = IOTIMEDOUT; 1998 1999 /* FALLTHROUGH */ 2000 2001 case IOTIMEDOUT: 2002 if (!(fdc->flags & FDC_NODMA)) { 2003 isa_dmadone(isa_dmabp(bp), 2004 bp->b_data + fd->skip, 2005 format ? bp->b_bcount : fdblk, fdc->dmachan); 2006 } 2007 if (fdc->status[0] & NE7_ST0_IC) { 2008 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2009 && fdc->status[1] & NE7_ST1_OR) { 2010 /* 2011 * DMA overrun. Someone hogged the bus and 2012 * didn't release it in time for the next 2013 * FDC transfer. 2014 * 2015 * We normally restart this without bumping 2016 * the retry counter. However, in case 2017 * something is seriously messed up (like 2018 * broken hardware), we rather limit the 2019 * number of retries so the IO operation 2020 * doesn't block indefinately. 2021 */ 2022 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 2023 fdc->state = SEEKCOMPLETE; 2024 return (1); 2025 } /* else fall through */ 2026 } 2027 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 2028 && fdc->retry < 6) 2029 fdc->retry = 6; /* force a reset */ 2030 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2031 && fdc->status[2] & NE7_ST2_WC 2032 && fdc->retry < 3) 2033 fdc->retry = 3; /* force recalibrate */ 2034 return (retrier(fdc)); 2035 } 2036 /* All OK */ 2037 /* Operation successful, retry DMA overruns again next time. */ 2038 fdc->dma_overruns = 0; 2039 fd->skip += fdblk; 2040 if (!format && fd->skip < bp->b_bcount - bp->b_resid) { 2041 /* set up next transfer */ 2042 fdc->state = DOSEEK; 2043 } else { 2044 /* ALL DONE */ 2045 fd->skip = 0; 2046 fdc->bio = NULL; 2047 #if 0 2048 device_unbusy(fd->dev); 2049 #endif 2050 devstat_end_transaction_buf(&fd->device_stats, bp); 2051 biodone(bio); 2052 fdc->fd = (fd_p) 0; 2053 fdc->fdu = -1; 2054 fdc->state = FINDWORK; 2055 } 2056 return (1); 2057 case RESETCTLR: 2058 fdc_reset(fdc); 2059 fdc->retry++; 2060 fdc->state = RESETCOMPLETE; 2061 return (0); 2062 case RESETCOMPLETE: 2063 /* 2064 * Discard all the results from the reset so that they 2065 * can't cause an unexpected interrupt later. 2066 */ 2067 for (i = 0; i < 4; i++) 2068 (void)fd_sense_int(fdc, &st0, &cyl); 2069 fdc->state = STARTRECAL; 2070 /* Fall through. */ 2071 case STARTRECAL: 2072 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 2073 /* arrgl */ 2074 fdc->retry = 6; 2075 return (retrier(fdc)); 2076 } 2077 fdc->state = RECALWAIT; 2078 return (0); /* will return later */ 2079 case RECALWAIT: 2080 /* allow heads to settle */ 2081 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc); 2082 fdc->state = RECALCOMPLETE; 2083 return (0); /* will return later */ 2084 case RECALCOMPLETE: 2085 do { 2086 /* 2087 * See SEEKCOMPLETE for a comment on this: 2088 */ 2089 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2090 return 0; 2091 if(fdc->fdct == FDC_NE765 2092 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2093 return 0; /* hope for a real intr */ 2094 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2095 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2096 { 2097 if(fdc->retry > 3) 2098 /* 2099 * a recalibrate from beyond cylinder 77 2100 * will "fail" due to the FDC limitations; 2101 * since people used to complain much about 2102 * the failure message, try not logging 2103 * this one if it seems to be the first 2104 * time in a line 2105 */ 2106 kprintf("fd%d: recal failed ST0 %b cyl %d\n", 2107 fdu, st0, NE7_ST0BITS, cyl); 2108 if(fdc->retry < 3) fdc->retry = 3; 2109 return (retrier(fdc)); 2110 } 2111 fd->track = 0; 2112 /* Seek (probably) necessary */ 2113 fdc->state = DOSEEK; 2114 return (1); /* will return immediatly */ 2115 case MOTORWAIT: 2116 if(fd->flags & FD_MOTOR_WAIT) 2117 { 2118 return (0); /* time's not up yet */ 2119 } 2120 if (fdc->flags & FDC_NEEDS_RESET) { 2121 fdc->state = RESETCTLR; 2122 fdc->flags &= ~FDC_NEEDS_RESET; 2123 } else { 2124 /* 2125 * If all motors were off, then the controller was 2126 * reset, so it has lost track of the current 2127 * cylinder. Recalibrate to handle this case. 2128 * But first, discard the results of the reset. 2129 */ 2130 fdc->state = RESETCOMPLETE; 2131 } 2132 return (1); /* will return immediatly */ 2133 default: 2134 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2135 if (fd_read_status(fdc, fd->fdsu) == 0) 2136 kprintf("FDC status :%x %x %x %x %x %x %x ", 2137 fdc->status[0], 2138 fdc->status[1], 2139 fdc->status[2], 2140 fdc->status[3], 2141 fdc->status[4], 2142 fdc->status[5], 2143 fdc->status[6] ); 2144 else 2145 kprintf("No status available "); 2146 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2147 { 2148 kprintf("[controller is dead now]\n"); 2149 return (0); 2150 } 2151 kprintf("ST0 = %x, PCN = %x\n", st0, cyl); 2152 return (0); 2153 } 2154 /*XXX confusing: some branches return immediately, others end up here*/ 2155 return (1); /* Come back immediatly to new state */ 2156 } 2157 2158 static int 2159 retrier(struct fdc_data *fdc) 2160 { 2161 struct bio *bio; 2162 struct buf *bp; 2163 struct fd_data *fd; 2164 cdev_t dev; 2165 int fdu; 2166 2167 bio = fdc->bio; 2168 bp = bio->bio_buf; 2169 dev = bio->bio_driver_info; 2170 2171 /* XXX shouldn't this be cached somewhere? */ 2172 fdu = dkunit(dev); 2173 fd = devclass_get_softc(fd_devclass, fdu); 2174 if (fd->options & FDOPT_NORETRY) 2175 goto fail; 2176 2177 switch (fdc->retry) { 2178 case 0: case 1: case 2: 2179 fdc->state = SEEKCOMPLETE; 2180 break; 2181 case 3: case 4: case 5: 2182 fdc->state = STARTRECAL; 2183 break; 2184 case 6: 2185 fdc->state = RESETCTLR; 2186 break; 2187 case 7: 2188 break; 2189 default: 2190 fail: 2191 { 2192 int printerror = (fd->options & FDOPT_NOERRLOG) == 0; 2193 2194 if (printerror) { 2195 /* 2196 * note: use the correct device for more 2197 * verbose error reporting. 2198 */ 2199 diskerr(bio, dev, 2200 "hard error", LOG_PRINTF, 2201 fdc->fd->skip); 2202 } 2203 if (printerror) { 2204 if (fdc->flags & FDC_STAT_VALID) 2205 kprintf( 2206 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2207 fdc->status[0], NE7_ST0BITS, 2208 fdc->status[1], NE7_ST1BITS, 2209 fdc->status[2], NE7_ST2BITS, 2210 fdc->status[3], fdc->status[4], 2211 fdc->status[5]); 2212 else 2213 kprintf(" (No status)\n"); 2214 } 2215 } 2216 bp->b_flags |= B_ERROR; 2217 bp->b_error = EIO; 2218 bp->b_resid += bp->b_bcount - fdc->fd->skip; 2219 fdc->bio = NULL; 2220 fdc->fd->skip = 0; 2221 #if 0 2222 device_unbusy(fd->dev); 2223 #endif 2224 devstat_end_transaction_buf(&fdc->fd->device_stats, bp); 2225 biodone(bio); 2226 fdc->state = FINDWORK; 2227 fdc->flags |= FDC_NEEDS_RESET; 2228 fdc->fd = (fd_p) 0; 2229 fdc->fdu = -1; 2230 return (1); 2231 } 2232 fdc->retry++; 2233 return (1); 2234 } 2235 2236 static int 2237 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred) 2238 { 2239 fdu_t fdu; 2240 fd_p fd; 2241 struct buf *bp; 2242 int rv = 0; 2243 size_t fdblk; 2244 2245 fdu = dkunit(dev); 2246 fd = devclass_get_softc(fd_devclass, fdu); 2247 fdblk = 128 << fd->ft.secsize; 2248 2249 /* set up a buffer header for fdstrategy() */ 2250 bp = getpbuf(NULL); 2251 bp->b_cmd = BUF_CMD_FORMAT; 2252 2253 /* 2254 * calculate a fake blkno, so fdstrategy() would initiate a 2255 * seek to the requested cylinder 2256 */ 2257 bp->b_bio1.bio_offset = (off_t)(finfo->cyl * 2258 (fd->ft.sectrac * fd->ft.heads) 2259 + finfo->head * fd->ft.sectrac) * fdblk; 2260 bp->b_bio1.bio_driver_info = dev; 2261 bp->b_bio1.bio_flags |= BIO_SYNC; 2262 bp->b_bio1.bio_done = biodone_sync; 2263 2264 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; 2265 bp->b_data = (caddr_t)finfo; 2266 2267 /* now do the format */ 2268 dev_dstrategy(dev, &bp->b_bio1); 2269 2270 /* ...and wait for it to complete */ 2271 rv = biowait_timeout(&bp->b_bio1, "fdform", 20 * hz); 2272 if (rv == EWOULDBLOCK) { 2273 /* timed out */ 2274 rv = EIO; 2275 #if 0 2276 device_unbusy(fd->dev); 2277 #endif 2278 biodone(&bp->b_bio1); 2279 } 2280 if (bp->b_flags & B_ERROR) 2281 rv = bp->b_error; 2282 /* 2283 * allow the process to be swapped 2284 */ 2285 relpbuf(bp, NULL); 2286 return rv; 2287 } 2288 2289 /* 2290 * TODO: don't allocate buffer on stack. 2291 */ 2292 2293 static int 2294 fdioctl(struct dev_ioctl_args *ap) 2295 { 2296 cdev_t dev = ap->a_head.a_dev; 2297 fdu_t fdu = dkunit(dev); 2298 fd_p fd = devclass_get_softc(fd_devclass, fdu); 2299 struct fdc_status *fsp; 2300 int error = 0; 2301 2302 switch (ap->a_cmd) { 2303 case FD_FORM: 2304 if ((ap->a_fflag & FWRITE) == 0) 2305 error = EBADF; /* must be opened for writing */ 2306 else if (((struct fd_formb *)ap->a_data)->format_version != 2307 FD_FORMAT_VERSION) 2308 error = EINVAL; /* wrong version of formatting prog */ 2309 else 2310 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred); 2311 break; 2312 2313 case FD_GTYPE: /* get drive type */ 2314 *(struct fd_type *)ap->a_data = fd->ft; 2315 break; 2316 2317 case FD_STYPE: /* set drive type */ 2318 /* this is considered harmful; only allow for superuser */ 2319 if (priv_check_cred(ap->a_cred, PRIV_ROOT, 0) != 0) 2320 return EPERM; 2321 fd->ft = *(struct fd_type *)ap->a_data; 2322 break; 2323 2324 case FD_GOPTS: /* get drive options */ 2325 *(int *)ap->a_data = fd->options; 2326 break; 2327 2328 case FD_SOPTS: /* set drive options */ 2329 fd->options = *(int *)ap->a_data; 2330 break; 2331 2332 case FD_GSTAT: 2333 fsp = (struct fdc_status *)ap->a_data; 2334 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2335 return EINVAL; 2336 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2337 break; 2338 2339 default: 2340 error = ENOTTY; 2341 break; 2342 } 2343 return (error); 2344 } 2345 2346 /* 2347 * Hello emacs, these are the 2348 * Local Variables: 2349 * c-indent-level: 8 2350 * c-continued-statement-offset: 8 2351 * c-continued-brace-offset: 0 2352 * c-brace-offset: -8 2353 * c-brace-imaginary-offset: 0 2354 * c-argdecl-indent: 8 2355 * c-label-offset: -8 2356 * c++-hanging-braces: 1 2357 * c++-access-specifier-offset: -8 2358 * c++-empty-arglist-indent: 8 2359 * c++-friend-offset: 0 2360 * End: 2361 */ 2362