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