1 /* 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Don Ahn. 7 * 8 * Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu) 9 * aided by the Linux floppy driver modifications from David Bateman 10 * (dbateman@eng.uts.edu.au). 11 * 12 * Copyright (c) 1993, 1994 by 13 * jc@irbs.UUCP (John Capo) 14 * vak@zebub.msk.su (Serge Vakulenko) 15 * ache@astral.msk.su (Andrew A. Chernov) 16 * 17 * Copyright (c) 1993, 1994, 1995 by 18 * joerg_wunsch@uriah.sax.de (Joerg Wunsch) 19 * dufault@hda.com (Peter Dufault) 20 * 21 * Copyright (c) 2001 Joerg Wunsch, 22 * joerg_wunsch@uriah.sax.de (Joerg Wunsch) 23 * 24 * Redistribution and use in source and binary forms, with or without 25 * modification, are permitted provided that the following conditions 26 * are met: 27 * 1. Redistributions of source code must retain the above copyright 28 * notice, this list of conditions and the following disclaimer. 29 * 2. Redistributions in binary form must reproduce the above copyright 30 * notice, this list of conditions and the following disclaimer in the 31 * documentation and/or other materials provided with the distribution. 32 * 3. All advertising materials mentioning features or use of this software 33 * must display the following acknowledgement: 34 * This product includes software developed by the University of 35 * California, Berkeley and its contributors. 36 * 4. Neither the name of the University nor the names of its contributors 37 * may be used to endorse or promote products derived from this software 38 * without specific prior written permission. 39 * 40 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * from: @(#)fd.c 7.4 (Berkeley) 5/25/91 53 * $FreeBSD: src/sys/isa/fd.c,v 1.176.2.8 2002/05/15 21:56:14 joerg Exp $ 54 * $DragonFly: src/sys/dev/disk/fd/fd.c,v 1.43 2008/08/13 08:18:09 swildner Exp $ 55 * 56 */ 57 58 #include "opt_fdc.h" 59 #include "use_pccard.h" 60 61 #include <sys/param.h> 62 #include <sys/systm.h> 63 #include <sys/bootmaj.h> 64 #include <sys/kernel.h> 65 #include <sys/buf.h> 66 #include <sys/bus.h> 67 #include <sys/conf.h> 68 #include <sys/diskslice.h> 69 #include <sys/disk.h> 70 #include <sys/devicestat.h> 71 #include <sys/fcntl.h> 72 #include <sys/malloc.h> 73 #include <sys/module.h> 74 #include <sys/proc.h> 75 #include <sys/priv.h> 76 #include <sys/syslog.h> 77 #include <sys/device.h> 78 #include <sys/bus.h> 79 #include <sys/rman.h> 80 #include <sys/buf2.h> 81 #include <sys/thread2.h> 82 83 #include <machine/clock.h> 84 #include <machine/ioctl_fd.h> 85 #include <machine/stdarg.h> 86 87 #include <bus/isa/isavar.h> 88 #include <bus/isa/isareg.h> 89 #include "fdreg.h" 90 #include "fdc.h" 91 #include <bus/isa/rtc.h> 92 93 /* configuration flags */ 94 #define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */ 95 #define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ 96 97 /* internally used only, not really from CMOS: */ 98 #define RTCFDT_144M_PRETENDED 0x1000 99 100 /* error returns for fd_cmd() */ 101 #define FD_FAILED -1 102 #define FD_NOT_VALID -2 103 #define FDC_ERRMAX 100 /* do not log more */ 104 /* 105 * Stop retrying after this many DMA overruns. Since each retry takes 106 * one revolution, with 300 rpm., 25 retries take approximately 10 107 * seconds which the read attempt will block in case the DMA overrun 108 * is persistent. 109 */ 110 #define FDC_DMAOV_MAX 25 111 112 /* 113 * Timeout value for the PIO loops to wait until the FDC main status 114 * register matches our expectations (request for master, direction 115 * bit). This is supposed to be a number of microseconds, although 116 * timing might actually not be very accurate. 117 * 118 * Timeouts of 100 msec are believed to be required for some broken 119 * (old) hardware. 120 */ 121 #define FDSTS_TIMEOUT 100000 122 123 #define NUMTYPES 17 124 #define NUMDENS (NUMTYPES - 7) 125 126 /* These defines (-1) must match index for fd_types */ 127 #define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */ 128 #define NO_TYPE 0 /* must match NO_TYPE in ft.c */ 129 #define FD_1720 1 130 #define FD_1480 2 131 #define FD_1440 3 132 #define FD_1200 4 133 #define FD_820 5 134 #define FD_800 6 135 #define FD_720 7 136 #define FD_360 8 137 #define FD_640 9 138 #define FD_1232 10 139 140 #define FD_1480in5_25 11 141 #define FD_1440in5_25 12 142 #define FD_820in5_25 13 143 #define FD_800in5_25 14 144 #define FD_720in5_25 15 145 #define FD_360in5_25 16 146 #define FD_640in5_25 17 147 148 149 static struct fd_type fd_types[NUMTYPES] = 150 { 151 { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */ 152 { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */ 153 { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */ 154 { 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */ 155 { 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */ 156 { 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */ 157 { 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */ 158 { 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */ 159 { 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */ 160 { 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 5.25in */ 161 162 { 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */ 163 { 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */ 164 { 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */ 165 { 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */ 166 { 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */ 167 { 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */ 168 { 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */ 169 }; 170 171 #define DRVS_PER_CTLR 2 /* 2 floppies */ 172 173 /***********************************************************************\ 174 * Per controller structure. * 175 \***********************************************************************/ 176 devclass_t fdc_devclass; 177 178 /***********************************************************************\ 179 * Per drive structure. * 180 * N per controller (DRVS_PER_CTLR) * 181 \***********************************************************************/ 182 struct fd_data { 183 struct fdc_data *fdc; /* pointer to controller structure */ 184 int fdsu; /* this units number on this controller */ 185 int type; /* Drive type (FD_1440...) */ 186 struct fd_type ft; /* the type descriptor */ 187 int flags; 188 #define FD_OPEN 0x01 /* it's open */ 189 #define FD_ACTIVE 0x02 /* it's active */ 190 #define FD_MOTOR 0x04 /* motor should be on */ 191 #define FD_MOTOR_WAIT 0x08 /* motor coming up */ 192 int skip; 193 int hddrv; 194 #define FD_NO_TRACK -2 195 int track; /* where we think the head is */ 196 int options; /* user configurable options, see ioctl_fd.h */ 197 struct callout toffhandle; 198 struct callout tohandle; 199 struct callout motor; 200 struct disk disk; 201 struct devstat device_stats; 202 device_t dev; 203 fdu_t fdu; 204 }; 205 206 struct fdc_ivars { 207 int fdunit; 208 }; 209 static devclass_t fd_devclass; 210 211 /***********************************************************************\ 212 * Throughout this file the following conventions will be used: * 213 * fd is a pointer to the fd_data struct for the drive in question * 214 * fdc is a pointer to the fdc_data struct for the controller * 215 * fdu is the floppy drive unit number * 216 * fdcu is the floppy controller unit number * 217 * fdsu is the floppy drive unit number on that controller. (sub-unit) * 218 \***********************************************************************/ 219 220 /* internal functions */ 221 static void fdc_intr(void *); 222 static void set_motor(struct fdc_data *, int, int); 223 # define TURNON 1 224 # define TURNOFF 0 225 static timeout_t fd_turnoff; 226 static timeout_t fd_motor_on; 227 static void fd_turnon(struct fd_data *); 228 static void fdc_reset(fdc_p); 229 static int fd_in(struct fdc_data *, int *); 230 static int out_fdc(struct fdc_data *, int); 231 static void fdstart(struct fdc_data *); 232 static timeout_t fd_iotimeout; 233 static timeout_t fd_pseudointr; 234 static int fdstate(struct fdc_data *); 235 static int retrier(struct fdc_data *); 236 static int fdformat(cdev_t, struct fd_formb *, struct ucred *); 237 238 static int enable_fifo(fdc_p fdc); 239 240 static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 241 242 243 #define DEVIDLE 0 244 #define FINDWORK 1 245 #define DOSEEK 2 246 #define SEEKCOMPLETE 3 247 #define IOCOMPLETE 4 248 #define RECALCOMPLETE 5 249 #define STARTRECAL 6 250 #define RESETCTLR 7 251 #define SEEKWAIT 8 252 #define RECALWAIT 9 253 #define MOTORWAIT 10 254 #define IOTIMEDOUT 11 255 #define RESETCOMPLETE 12 256 #define PIOREAD 13 257 258 #ifdef FDC_DEBUG 259 static char const * const fdstates[] = 260 { 261 "DEVIDLE", 262 "FINDWORK", 263 "DOSEEK", 264 "SEEKCOMPLETE", 265 "IOCOMPLETE", 266 "RECALCOMPLETE", 267 "STARTRECAL", 268 "RESETCTLR", 269 "SEEKWAIT", 270 "RECALWAIT", 271 "MOTORWAIT", 272 "IOTIMEDOUT", 273 "RESETCOMPLETE", 274 "PIOREAD", 275 }; 276 277 /* CAUTION: fd_debug causes huge amounts of logging output */ 278 static int volatile fd_debug = 0; 279 #define TRACE0(arg) if(fd_debug) kprintf(arg) 280 #define TRACE1(arg1, arg2) if(fd_debug) kprintf(arg1, arg2) 281 #else /* FDC_DEBUG */ 282 #define TRACE0(arg) 283 #define TRACE1(arg1, arg2) 284 #endif /* FDC_DEBUG */ 285 286 void 287 fdout_wr(fdc_p fdc, u_int8_t v) 288 { 289 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 290 } 291 292 static u_int8_t 293 fdsts_rd(fdc_p fdc) 294 { 295 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 296 } 297 298 static void 299 fddata_wr(fdc_p fdc, u_int8_t v) 300 { 301 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 302 } 303 304 static u_int8_t 305 fddata_rd(fdc_p fdc) 306 { 307 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 308 } 309 310 static void 311 fdctl_wr_isa(fdc_p fdc, u_int8_t v) 312 { 313 bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); 314 } 315 316 #if 0 317 318 static u_int8_t 319 fdin_rd(fdc_p fdc) 320 { 321 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 322 } 323 324 #endif 325 326 static d_open_t Fdopen; /* NOTE, not fdopen */ 327 static d_close_t fdclose; 328 static d_ioctl_t fdioctl; 329 static d_strategy_t fdstrategy; 330 331 static struct dev_ops fd_ops = { 332 { "fd", FD_CDEV_MAJOR, D_DISK }, 333 .d_open = Fdopen, 334 .d_close = fdclose, 335 .d_read = physread, 336 .d_write = physwrite, 337 .d_ioctl = fdioctl, 338 .d_strategy = fdstrategy, 339 }; 340 341 static int 342 fdc_err(struct fdc_data *fdc, const char *s) 343 { 344 fdc->fdc_errs++; 345 if (s) { 346 if (fdc->fdc_errs < FDC_ERRMAX) 347 device_printf(fdc->fdc_dev, "%s", s); 348 else if (fdc->fdc_errs == FDC_ERRMAX) 349 device_printf(fdc->fdc_dev, "too many errors, not " 350 "logging any more\n"); 351 } 352 353 return FD_FAILED; 354 } 355 356 /* 357 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 358 * Unit number, 359 * # of output bytes, output bytes as ints ..., 360 * # of input bytes, input bytes as ints ... 361 */ 362 int 363 fd_cmd(struct fdc_data *fdc, int n_out, ...) 364 { 365 u_char cmd; 366 int n_in; 367 int n; 368 __va_list ap; 369 370 __va_start(ap, n_out); 371 cmd = (u_char)(__va_arg(ap, int)); 372 __va_end(ap); 373 __va_start(ap, n_out); 374 for (n = 0; n < n_out; n++) 375 { 376 if (out_fdc(fdc, __va_arg(ap, int)) < 0) 377 { 378 char msg[50]; 379 ksnprintf(msg, sizeof(msg), 380 "cmd %x failed at out byte %d of %d\n", 381 cmd, n + 1, n_out); 382 return fdc_err(fdc, msg); 383 } 384 } 385 n_in = __va_arg(ap, int); 386 for (n = 0; n < n_in; n++) 387 { 388 int *ptr = __va_arg(ap, int *); 389 if (fd_in(fdc, ptr) < 0) 390 { 391 char msg[50]; 392 ksnprintf(msg, sizeof(msg), 393 "cmd %02x failed at in byte %d of %d\n", 394 cmd, n + 1, n_in); 395 return fdc_err(fdc, msg); 396 } 397 } 398 399 return 0; 400 } 401 402 static int 403 enable_fifo(fdc_p fdc) 404 { 405 int i, j; 406 407 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 408 409 /* 410 * XXX: 411 * Cannot use fd_cmd the normal way here, since 412 * this might be an invalid command. Thus we send the 413 * first byte, and check for an early turn of data directon. 414 */ 415 416 if (out_fdc(fdc, I8207X_CONFIGURE) < 0) 417 return fdc_err(fdc, "Enable FIFO failed\n"); 418 419 /* If command is invalid, return */ 420 j = FDSTS_TIMEOUT; 421 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 422 != NE7_RQM && j-- > 0) { 423 if (i == (NE7_DIO | NE7_RQM)) { 424 fdc_reset(fdc); 425 return FD_FAILED; 426 } 427 DELAY(1); 428 } 429 if (j<0 || 430 fd_cmd(fdc, 3, 431 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 432 fdc_reset(fdc); 433 return fdc_err(fdc, "Enable FIFO failed\n"); 434 } 435 fdc->flags |= FDC_HAS_FIFO; 436 return 0; 437 } 438 if (fd_cmd(fdc, 4, 439 I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 440 return fdc_err(fdc, "Re-enable FIFO failed\n"); 441 return 0; 442 } 443 444 static int 445 fd_sense_drive_status(fdc_p fdc, int *st3p) 446 { 447 int st3; 448 449 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 450 { 451 return fdc_err(fdc, "Sense Drive Status failed\n"); 452 } 453 if (st3p) 454 *st3p = st3; 455 456 return 0; 457 } 458 459 static int 460 fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 461 { 462 int cyl, st0, ret; 463 464 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 465 if (ret) { 466 (void)fdc_err(fdc, 467 "sense intr err reading stat reg 0\n"); 468 return ret; 469 } 470 471 if (st0p) 472 *st0p = st0; 473 474 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 475 /* 476 * There doesn't seem to have been an interrupt. 477 */ 478 return FD_NOT_VALID; 479 } 480 481 if (fd_in(fdc, &cyl) < 0) { 482 return fdc_err(fdc, "can't get cyl num\n"); 483 } 484 485 if (cylp) 486 *cylp = cyl; 487 488 return 0; 489 } 490 491 492 static int 493 fd_read_status(fdc_p fdc, int fdsu) 494 { 495 int i, ret; 496 497 for (i = 0; i < 7; i++) { 498 /* 499 * XXX types are poorly chosen. Only bytes can by read 500 * from the hardware, but fdc->status[] wants u_ints and 501 * fd_in() gives ints. 502 */ 503 int status; 504 505 ret = fd_in(fdc, &status); 506 fdc->status[i] = status; 507 if (ret != 0) 508 break; 509 } 510 511 if (ret == 0) 512 fdc->flags |= FDC_STAT_VALID; 513 else 514 fdc->flags &= ~FDC_STAT_VALID; 515 516 return ret; 517 } 518 519 /****************************************************************************/ 520 /* autoconfiguration stuff */ 521 /****************************************************************************/ 522 523 int 524 fdc_alloc_resources(struct fdc_data *fdc) 525 { 526 device_t dev; 527 int ispnp, ispcmcia; 528 529 dev = fdc->fdc_dev; 530 ispnp = (fdc->flags & FDC_ISPNP) != 0; 531 ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0; 532 fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0; 533 fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0; 534 535 /* 536 * On standard ISA, we don't just use an 8 port range 537 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 538 * register at 0x3f6. 539 * 540 * Isn't PC hardware wonderful. 541 * 542 * The Y-E Data PCMCIA FDC doesn't have this problem, it 543 * uses the register with offset 6 for pseudo-DMA, and the 544 * one with offset 7 as control register. 545 */ 546 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 547 &fdc->rid_ioport, 0ul, ~0ul, 548 ispcmcia ? 8 : (ispnp ? 1 : 6), 549 RF_ACTIVE); 550 if (fdc->res_ioport == 0) { 551 device_printf(dev, "cannot reserve I/O port range\n"); 552 return ENXIO; 553 } 554 fdc->portt = rman_get_bustag(fdc->res_ioport); 555 fdc->porth = rman_get_bushandle(fdc->res_ioport); 556 557 if (!ispcmcia) { 558 /* 559 * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 560 * and some at 0x3f0-0x3f5,0x3f7. We detect the former 561 * by checking the size and adjust the port address 562 * accordingly. 563 */ 564 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) 565 fdc->port_off = -2; 566 567 /* 568 * Register the control port range as rid 1 if it 569 * isn't there already. Most PnP BIOSen will have 570 * already done this but non-PnP configurations don't. 571 * 572 * And some (!!) report 0x3f2-0x3f5 and completely 573 * leave out the control register! It seems that some 574 * non-antique controller chips have a different 575 * method of programming the transfer speed which 576 * doesn't require the control register, but it's 577 * mighty bogus as the chip still responds to the 578 * address for the control register. 579 */ 580 if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { 581 u_long ctlstart; 582 583 /* Find the control port, usually 0x3f7 */ 584 ctlstart = rman_get_start(fdc->res_ioport) + 585 fdc->port_off + 7; 586 587 bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 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, 0, 0); 858 DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, 0, 0); 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 1019 /* 1020 * Make special raw floppy devices with preset types to 1021 * make formatting easier. These override the disk management 1022 * layer for the whole-slice-disk for partitions 128-191. Note 1023 * that we do not override partition 255, which is the 1024 * whole-slice-part. If we did we would have to provide our 1025 * own DIOCGPART ioctl. 1026 */ 1027 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 1), 1028 UID_ROOT, GID_WHEEL, 0600, "fd%d.1720", fd->fdu); 1029 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 2), 1030 UID_ROOT, GID_WHEEL, 0600, "fd%d.1480", fd->fdu); 1031 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 3), 1032 UID_ROOT, GID_WHEEL, 0600, "fd%d.1440", fd->fdu); 1033 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 4), 1034 UID_ROOT, GID_WHEEL, 0600, "fd%d.1200", fd->fdu); 1035 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 5), 1036 UID_ROOT, GID_WHEEL, 0600, "fd%d.820", fd->fdu); 1037 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 6), 1038 UID_ROOT, GID_WHEEL, 0600, "fd%d.800", fd->fdu); 1039 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 7), 1040 UID_ROOT, GID_WHEEL, 0600, "fd%d.720", fd->fdu); 1041 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 8), 1042 UID_ROOT, GID_WHEEL, 0600, "fd%d.360", fd->fdu); 1043 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 9), 1044 UID_ROOT, GID_WHEEL, 0600, "fd%d.640", fd->fdu); 1045 make_dev(&fd_ops, dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128 + 10), 1046 UID_ROOT, GID_WHEEL, 0600, "fd%d.1232", fd->fdu); 1047 1048 devstat_add_entry(&fd->device_stats, device_get_name(dev), 1049 device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS, 1050 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1051 DEVSTAT_PRIORITY_FD); 1052 1053 if (fd->type != NO_TYPE) { 1054 bzero(&info, sizeof(info)); 1055 ft = &fd_types[fd->type - 1]; 1056 info.d_media_blksize = 128 << ft->secsize; 1057 info.d_media_blocks = ft->size; 1058 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR; 1059 info.d_nheads = ft->heads; 1060 info.d_secpertrack = ft->sectrac; 1061 info.d_secpercyl = ft->sectrac * ft->heads; 1062 info.d_ncylinders = ft->size / info.d_secpercyl; 1063 disk_setdiskinfo(&fd->disk, &info); 1064 } 1065 return (0); 1066 } 1067 1068 static int 1069 fd_detach(device_t dev) 1070 { 1071 struct fd_data *fd; 1072 1073 fd = device_get_softc(dev); 1074 kprintf("devfs: Please make sure that only the right fd device was removed!!!\n"); 1075 dev_ops_remove_minor(&fd_ops, 1076 /*dkunitmask() | dkmakeslice(-1) | dkmakepart(128|64),*/ 1077 dkmakeminor(fd->fdu, WHOLE_DISK_SLICE, 128)); 1078 disk_invalidate(&fd->disk); 1079 disk_destroy(&fd->disk); 1080 devstat_remove_entry(&fd->device_stats); 1081 callout_stop(&fd->toffhandle); 1082 callout_stop(&fd->motor); 1083 1084 return (0); 1085 } 1086 1087 static device_method_t fd_methods[] = { 1088 /* Device interface */ 1089 DEVMETHOD(device_probe, fd_probe), 1090 DEVMETHOD(device_attach, fd_attach), 1091 DEVMETHOD(device_detach, fd_detach), 1092 DEVMETHOD(device_shutdown, bus_generic_shutdown), 1093 DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */ 1094 DEVMETHOD(device_resume, bus_generic_resume), /* XXX */ 1095 1096 { 0, 0 } 1097 }; 1098 1099 static driver_t fd_driver = { 1100 "fd", 1101 fd_methods, 1102 sizeof(struct fd_data) 1103 }; 1104 1105 DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1106 1107 /****************************************************************************/ 1108 /* motor control stuff */ 1109 /* remember to not deselect the drive we're working on */ 1110 /****************************************************************************/ 1111 static void 1112 set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1113 { 1114 int fdout = fdc->fdout; 1115 int needspecify = 0; 1116 1117 if(turnon) { 1118 fdout &= ~FDO_FDSEL; 1119 fdout |= (FDO_MOEN0 << fdsu) + fdsu; 1120 } else 1121 fdout &= ~(FDO_MOEN0 << fdsu); 1122 1123 if(!turnon 1124 && (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0) 1125 /* gonna turn off the last drive, put FDC to bed */ 1126 fdout &= ~ (FDO_FRST|FDO_FDMAEN); 1127 else { 1128 /* make sure controller is selected and specified */ 1129 if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0) 1130 needspecify = 1; 1131 fdout |= (FDO_FRST|FDO_FDMAEN); 1132 } 1133 1134 fdout_wr(fdc, fdout); 1135 fdc->fdout = fdout; 1136 TRACE1("[0x%x->FDOUT]", fdout); 1137 1138 if (needspecify) { 1139 /* 1140 * XXX 1141 * special case: since we have just woken up the FDC 1142 * from its sleep, we silently assume the command will 1143 * be accepted, and do not test for a timeout 1144 */ 1145 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1146 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1147 0); 1148 if (fdc->flags & FDC_HAS_FIFO) 1149 (void) enable_fifo(fdc); 1150 } 1151 } 1152 1153 static void 1154 fd_turnoff(void *xfd) 1155 { 1156 fd_p fd = xfd; 1157 1158 TRACE1("[fd%d: turnoff]", fd->fdu); 1159 1160 crit_enter(); 1161 /* 1162 * Don't turn off the motor yet if the drive is active. 1163 * 1164 * If we got here, this could only mean we missed an interrupt. 1165 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1166 * after a controller reset. Just schedule a pseudo-interrupt 1167 * so the state machine gets re-entered. 1168 */ 1169 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1170 fdc_intr(fd->fdc); 1171 crit_exit(); 1172 return; 1173 } 1174 1175 fd->flags &= ~FD_MOTOR; 1176 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1177 crit_exit(); 1178 } 1179 1180 static void 1181 fd_motor_on(void *xfd) 1182 { 1183 fd_p fd = xfd; 1184 1185 crit_enter(); 1186 fd->flags &= ~FD_MOTOR_WAIT; 1187 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1188 { 1189 fdc_intr(fd->fdc); 1190 } 1191 crit_exit(); 1192 } 1193 1194 static void 1195 fd_turnon(fd_p fd) 1196 { 1197 if(!(fd->flags & FD_MOTOR)) 1198 { 1199 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1200 set_motor(fd->fdc, fd->fdsu, TURNON); 1201 callout_reset(&fd->motor, hz, fd_motor_on, fd); 1202 } 1203 } 1204 1205 static void 1206 fdc_reset(fdc_p fdc) 1207 { 1208 /* Try a reset, keep motor on */ 1209 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1210 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1211 DELAY(100); 1212 /* enable FDC, but defer interrupts a moment */ 1213 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1214 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1215 DELAY(100); 1216 fdout_wr(fdc, fdc->fdout); 1217 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1218 1219 /* XXX after a reset, silently believe the FDC will accept commands */ 1220 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1221 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1222 0); 1223 if (fdc->flags & FDC_HAS_FIFO) 1224 (void) enable_fifo(fdc); 1225 } 1226 1227 /****************************************************************************/ 1228 /* fdc in/out */ 1229 /****************************************************************************/ 1230 /* 1231 * FDC IO functions, take care of the main status register, timeout 1232 * in case the desired status bits are never set. 1233 * 1234 * These PIO loops initially start out with short delays between 1235 * each iteration in the expectation that the required condition 1236 * is usually met quickly, so it can be handled immediately. After 1237 * about 1 ms, stepping is increased to achieve a better timing 1238 * accuracy in the calls to DELAY(). 1239 */ 1240 static int 1241 fd_in(struct fdc_data *fdc, int *ptr) 1242 { 1243 int i, j, step; 1244 1245 for (j = 0, step = 1; 1246 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) && 1247 j < FDSTS_TIMEOUT; 1248 j += step) { 1249 if (i == NE7_RQM) 1250 return (fdc_err(fdc, "ready for output in input\n")); 1251 if (j == 1000) 1252 step = 1000; 1253 DELAY(step); 1254 } 1255 if (j >= FDSTS_TIMEOUT) 1256 return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0)); 1257 #ifdef FDC_DEBUG 1258 i = fddata_rd(fdc); 1259 TRACE1("[FDDATA->0x%x]", (unsigned char)i); 1260 *ptr = i; 1261 return (0); 1262 #else /* !FDC_DEBUG */ 1263 i = fddata_rd(fdc); 1264 if (ptr) 1265 *ptr = i; 1266 return (0); 1267 #endif /* FDC_DEBUG */ 1268 } 1269 1270 static int 1271 out_fdc(struct fdc_data *fdc, int x) 1272 { 1273 int i, j, step; 1274 1275 for (j = 0, step = 1; 1276 (i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM && 1277 j < FDSTS_TIMEOUT; 1278 j += step) { 1279 if (i == (NE7_DIO|NE7_RQM)) 1280 return (fdc_err(fdc, "ready for input in output\n")); 1281 if (j == 1000) 1282 step = 1000; 1283 DELAY(step); 1284 } 1285 if (j >= FDSTS_TIMEOUT) 1286 return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0)); 1287 1288 /* Send the command and return */ 1289 fddata_wr(fdc, x); 1290 TRACE1("[0x%x->FDDATA]", x); 1291 return (0); 1292 } 1293 1294 /****************************************************************************/ 1295 /* fdopen/fdclose */ 1296 /****************************************************************************/ 1297 int 1298 Fdopen(struct dev_open_args *ap) 1299 { 1300 cdev_t dev = ap->a_head.a_dev; 1301 fdu_t fdu = dkunit(dev); 1302 struct disk_info info; 1303 struct fd_type *ft; 1304 int type; 1305 int changetype; 1306 fd_p fd; 1307 fdc_p fdc; 1308 1309 /* check bounds */ 1310 if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0) 1311 return (ENXIO); 1312 fdc = fd->fdc; 1313 if ((fdc == NULL) || (fd->type == NO_TYPE)) 1314 return (ENXIO); 1315 1316 /* 1317 * Figure out the type of floppy. There are special whole-disk-device 1318 * overrides that will override the current type. 1319 */ 1320 type = dkpart(dev); 1321 if (type == WHOLE_SLICE_PART) { 1322 type = fd->type; /* do not change selected type data */ 1323 changetype = 0; 1324 } else if (type > 128) { 1325 type -= 128; /* set to specific format */ 1326 changetype = 1; 1327 } else { 1328 type = fd->type; /* reset to default */ 1329 changetype = 1; 1330 } 1331 if (type > NUMDENS) 1332 return (ENXIO); 1333 if (type != fd->type) { 1334 /* 1335 * For each type of basic drive, make sure we are trying 1336 * to open a type it can do, 1337 */ 1338 switch (fd->type) { 1339 case FD_360: 1340 return (ENXIO); 1341 case FD_720: 1342 if ( type != FD_820 1343 && type != FD_800 1344 && type != FD_640 1345 ) 1346 return (ENXIO); 1347 break; 1348 case FD_1200: 1349 switch (type) { 1350 case FD_1480: 1351 type = FD_1480in5_25; 1352 break; 1353 case FD_1440: 1354 type = FD_1440in5_25; 1355 break; 1356 case FD_1232: 1357 break; 1358 case FD_820: 1359 type = FD_820in5_25; 1360 break; 1361 case FD_800: 1362 type = FD_800in5_25; 1363 break; 1364 case FD_720: 1365 type = FD_720in5_25; 1366 break; 1367 case FD_640: 1368 type = FD_640in5_25; 1369 break; 1370 case FD_360: 1371 type = FD_360in5_25; 1372 break; 1373 default: 1374 return(ENXIO); 1375 } 1376 break; 1377 case FD_1440: 1378 if ( type != FD_1720 1379 && type != FD_1480 1380 && type != FD_1200 1381 && type != FD_820 1382 && type != FD_800 1383 && type != FD_720 1384 && type != FD_640 1385 ) 1386 return(ENXIO); 1387 break; 1388 } 1389 } 1390 1391 /* 1392 * fd->type is the basic drive type, not the current format 1393 * we are reading. We only change the type when opening the 1394 * whole-slice-partition 1395 */ 1396 if (changetype) 1397 fd->ft = fd_types[type - 1]; 1398 fd->flags |= FD_OPEN; 1399 1400 /* 1401 * Clearing the DMA overrun counter at open time is a bit messy. 1402 * Since we're only managing one counter per controller, opening 1403 * the second drive could mess it up. Anyway, if the DMA overrun 1404 * condition is really persistent, it will eventually time out 1405 * still. OTOH, clearing it here will ensure we'll at least start 1406 * trying again after a previous (maybe even long ago) failure. 1407 * Also, this is merely a stop-gap measure only that should not 1408 * happen during normal operation, so we can tolerate it to be a 1409 * bit sloppy about this. 1410 */ 1411 fdc->dma_overruns = 0; 1412 1413 /* 1414 * Set disk parameters for the disk management layer. 1415 * 1416 * Note that we do not set RAWEXTENSIONS here. We override 1417 * the minor numbers in the raw-extension range and handle them 1418 * directly. 1419 */ 1420 bzero(&info, sizeof(info)); 1421 ft = &fd->ft; 1422 info.d_media_blksize = 128 << ft->secsize; 1423 info.d_media_blocks = ft->size; 1424 info.d_dsflags = DSO_COMPATPARTA | DSO_COMPATMBR; 1425 info.d_nheads = ft->heads; 1426 info.d_secpertrack = ft->sectrac; 1427 info.d_secpercyl = ft->sectrac * ft->heads; 1428 info.d_ncylinders = ft->size / info.d_secpercyl; 1429 disk_setdiskinfo(&fd->disk, &info); 1430 1431 return 0; 1432 } 1433 1434 int 1435 fdclose(struct dev_close_args *ap) 1436 { 1437 cdev_t dev = ap->a_head.a_dev; 1438 fdu_t fdu = dkunit(dev); 1439 struct fd_data *fd; 1440 1441 fd = devclass_get_softc(fd_devclass, fdu); 1442 fd->flags &= ~FD_OPEN; 1443 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG); 1444 1445 return (0); 1446 } 1447 1448 /****************************************************************************/ 1449 /* fdstrategy */ 1450 /****************************************************************************/ 1451 int 1452 fdstrategy(struct dev_strategy_args *ap) 1453 { 1454 cdev_t dev = ap->a_head.a_dev; 1455 struct bio *bio = ap->a_bio; 1456 struct buf *bp = bio->bio_buf; 1457 unsigned nblocks, blknum, cando; 1458 fdu_t fdu; 1459 fdc_p fdc; 1460 fd_p fd; 1461 size_t fdblk; 1462 1463 fdu = dkunit(dev); 1464 fd = devclass_get_softc(fd_devclass, fdu); 1465 if (fd == 0) 1466 panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)", 1467 (u_long)major(dev), (u_long)minor(dev)); 1468 fdc = fd->fdc; 1469 if (fd->type == NO_TYPE) { 1470 bp->b_error = ENXIO; 1471 bp->b_flags |= B_ERROR; 1472 goto bad; 1473 }; 1474 1475 fdblk = 128 << (fd->ft.secsize); 1476 if (bp->b_cmd != BUF_CMD_FORMAT) { 1477 if (bio->bio_offset < 0) { 1478 kprintf( 1479 "fd%d: fdstrat: bad request offset = %lld, bcount = %d\n", 1480 fdu, bio->bio_offset, bp->b_bcount); 1481 bp->b_error = EINVAL; 1482 bp->b_flags |= B_ERROR; 1483 goto bad; 1484 } 1485 if ((bp->b_bcount % fdblk) != 0) { 1486 bp->b_error = EINVAL; 1487 bp->b_flags |= B_ERROR; 1488 goto bad; 1489 } 1490 } 1491 1492 /* 1493 * Set up block calculations. 1494 */ 1495 if (bio->bio_offset > 20000000LL * fdblk) { 1496 /* 1497 * Reject unreasonably high block number, prevent the 1498 * multiplication below from overflowing. 1499 */ 1500 bp->b_error = EINVAL; 1501 bp->b_flags |= B_ERROR; 1502 goto bad; 1503 } 1504 blknum = (unsigned)(bio->bio_offset / fdblk); 1505 nblocks = fd->ft.size; 1506 bp->b_resid = 0; 1507 if (blknum + (bp->b_bcount / fdblk) > nblocks) { 1508 if (blknum <= nblocks) { 1509 cando = (nblocks - blknum) * fdblk; 1510 bp->b_resid = bp->b_bcount - cando; 1511 if (cando == 0) 1512 goto bad; /* not actually bad but EOF */ 1513 } else { 1514 bp->b_error = EINVAL; 1515 bp->b_flags |= B_ERROR; 1516 goto bad; 1517 } 1518 } 1519 crit_enter(); 1520 bio->bio_driver_info = dev; 1521 bioqdisksort(&fdc->bio_queue, bio); 1522 callout_stop(&fd->toffhandle); 1523 1524 /* Tell devstat we are starting on the transaction */ 1525 devstat_start_transaction(&fd->device_stats); 1526 #if 0 1527 device_busy(fd->dev); 1528 #endif 1529 fdstart(fdc); 1530 crit_exit(); 1531 return(0); 1532 1533 bad: 1534 biodone(bio); 1535 return(0); 1536 } 1537 1538 /***************************************************************\ 1539 * fdstart * 1540 * We have just queued something.. if the controller is not busy * 1541 * then simulate the case where it has just finished a command * 1542 * So that it (the interrupt routine) looks on the queue for more* 1543 * work to do and picks up what we just added. * 1544 * If the controller is already busy, we need do nothing, as it * 1545 * will pick up our work when the present work completes * 1546 \***************************************************************/ 1547 static void 1548 fdstart(struct fdc_data *fdc) 1549 { 1550 crit_enter(); 1551 if(fdc->state == DEVIDLE) 1552 { 1553 fdc_intr(fdc); 1554 } 1555 crit_exit(); 1556 } 1557 1558 static void 1559 fd_iotimeout(void *xfdc) 1560 { 1561 fdc_p fdc; 1562 1563 fdc = xfdc; 1564 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1565 1566 /* 1567 * Due to IBM's brain-dead design, the FDC has a faked ready 1568 * signal, hardwired to ready == true. Thus, any command 1569 * issued if there's no diskette in the drive will _never_ 1570 * complete, and must be aborted by resetting the FDC. 1571 * Many thanks, Big Blue! 1572 * The FDC must not be reset directly, since that would 1573 * interfere with the state machine. Instead, pretend that 1574 * the command completed but was invalid. The state machine 1575 * will reset the FDC and retry once. 1576 */ 1577 crit_enter(); 1578 fdc->status[0] = NE7_ST0_IC_IV; 1579 fdc->flags &= ~FDC_STAT_VALID; 1580 fdc->state = IOTIMEDOUT; 1581 fdc_intr(fdc); 1582 crit_exit(); 1583 } 1584 1585 /* just ensure it is running in a critical section */ 1586 static void 1587 fd_pseudointr(void *xfdc) 1588 { 1589 crit_enter(); 1590 fdc_intr(xfdc); 1591 crit_exit(); 1592 } 1593 1594 /***********************************************************************\ 1595 * fdintr * 1596 * keep calling the state machine until it returns a 0 * 1597 * ALWAYS called at SPLBIO * 1598 \***********************************************************************/ 1599 static void 1600 fdc_intr(void *xfdc) 1601 { 1602 fdc_p fdc = xfdc; 1603 while(fdstate(fdc)) 1604 ; 1605 } 1606 1607 /* 1608 * magic pseudo-DMA initialization for YE FDC. Sets count and 1609 * direction 1610 */ 1611 #define SET_BCDR(fdc,wr,cnt,port) \ 1612 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1613 ((cnt)-1) & 0xff); \ 1614 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1615 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1616 1617 /* 1618 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy 1619 */ 1620 static int fdcpio(fdc_p fdc, buf_cmd_t cmd, caddr_t addr, u_int count) 1621 { 1622 u_char *cptr = (u_char *)addr; 1623 1624 if (cmd == BUF_CMD_READ) { 1625 if (fdc->state != PIOREAD) { 1626 fdc->state = PIOREAD; 1627 return(0); 1628 }; 1629 SET_BCDR(fdc, 0, count, 0); 1630 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1631 FDC_YE_DATAPORT, cptr, count); 1632 } else { 1633 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1634 FDC_YE_DATAPORT, cptr, count); 1635 SET_BCDR(fdc, 0, count, 0); 1636 }; 1637 return(1); 1638 } 1639 1640 /***********************************************************************\ 1641 * The controller state machine. * 1642 * if it returns a non zero value, it should be called again immediatly * 1643 \***********************************************************************/ 1644 static int 1645 fdstate(fdc_p fdc) 1646 { 1647 int read, format, head, i, sec = 0, sectrac, st0, cyl, st3; 1648 unsigned blknum = 0, b_cylinder = 0; 1649 fdu_t fdu; 1650 fd_p fd; 1651 struct bio *bio; 1652 struct buf *bp; 1653 struct fd_formb *finfo = NULL; 1654 size_t fdblk; 1655 cdev_t dev; 1656 1657 bio = fdc->bio; 1658 if (bio == NULL) { 1659 bio = bioq_first(&fdc->bio_queue); 1660 if (bio != NULL) { 1661 bioq_remove(&fdc->bio_queue, bio); 1662 fdc->bio = bio; 1663 } 1664 } 1665 if (bio == NULL) { 1666 /***********************************************\ 1667 * nothing left for this controller to do * 1668 * Force into the IDLE state, * 1669 \***********************************************/ 1670 fdc->state = DEVIDLE; 1671 if (fdc->fd) { 1672 device_printf(fdc->fdc_dev, 1673 "unexpected valid fd pointer\n"); 1674 fdc->fd = (fd_p) 0; 1675 fdc->fdu = -1; 1676 } 1677 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1678 return (0); 1679 } 1680 bp = bio->bio_buf; 1681 dev = bio->bio_driver_info; 1682 1683 fdu = dkunit(dev); 1684 fd = devclass_get_softc(fd_devclass, fdu); 1685 fdblk = 128 << fd->ft.secsize; 1686 if (fdc->fd && (fd != fdc->fd)) 1687 device_printf(fd->dev, "confused fd pointers\n"); 1688 read = (bp->b_cmd == BUF_CMD_READ); 1689 format = (bp->b_cmd == BUF_CMD_FORMAT); 1690 if (format) { 1691 finfo = (struct fd_formb *)bp->b_data; 1692 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 1693 - (char *)finfo; 1694 } 1695 if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) { 1696 blknum = (unsigned)(bio->bio_offset / fdblk) + 1697 fd->skip /fdblk; 1698 b_cylinder = blknum / (fd->ft.sectrac * fd->ft.heads); 1699 } 1700 TRACE1("fd%d", fdu); 1701 TRACE1("[%s]", fdstates[fdc->state]); 1702 TRACE1("(0x%x)", fd->flags); 1703 callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd); 1704 switch (fdc->state) 1705 { 1706 case DEVIDLE: 1707 case FINDWORK: /* we have found new work */ 1708 fdc->retry = 0; 1709 fd->skip = 0; 1710 fdc->fd = fd; 1711 fdc->fdu = fdu; 1712 fdc->fdctl_wr(fdc, fd->ft.trans); 1713 TRACE1("[0x%x->FDCTL]", fd->ft.trans); 1714 /*******************************************************\ 1715 * If the next drive has a motor startup pending, then * 1716 * it will start up in its own good time * 1717 \*******************************************************/ 1718 if(fd->flags & FD_MOTOR_WAIT) { 1719 fdc->state = MOTORWAIT; 1720 return (0); /* come back later */ 1721 } 1722 /*******************************************************\ 1723 * Maybe if it's not starting, it SHOULD be starting * 1724 \*******************************************************/ 1725 if (!(fd->flags & FD_MOTOR)) 1726 { 1727 fdc->state = MOTORWAIT; 1728 fd_turnon(fd); 1729 return (0); 1730 } 1731 else /* at least make sure we are selected */ 1732 { 1733 set_motor(fdc, fd->fdsu, TURNON); 1734 } 1735 if (fdc->flags & FDC_NEEDS_RESET) { 1736 fdc->state = RESETCTLR; 1737 fdc->flags &= ~FDC_NEEDS_RESET; 1738 } else 1739 fdc->state = DOSEEK; 1740 break; 1741 case DOSEEK: 1742 if (b_cylinder == (unsigned)fd->track) 1743 { 1744 fdc->state = SEEKCOMPLETE; 1745 break; 1746 } 1747 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 1748 fd->fdsu, b_cylinder * fd->ft.steptrac, 1749 0)) 1750 { 1751 /* 1752 * seek command not accepted, looks like 1753 * the FDC went off to the Saints... 1754 */ 1755 fdc->retry = 6; /* try a reset */ 1756 return(retrier(fdc)); 1757 } 1758 fd->track = FD_NO_TRACK; 1759 fdc->state = SEEKWAIT; 1760 return(0); /* will return later */ 1761 case SEEKWAIT: 1762 /* allow heads to settle */ 1763 callout_reset(&fdc->pseudointr_ch, hz / 16, 1764 fd_pseudointr, fdc); 1765 fdc->state = SEEKCOMPLETE; 1766 return(0); /* will return later */ 1767 case SEEKCOMPLETE : /* SEEK DONE, START DMA */ 1768 /* Make sure seek really happened*/ 1769 if(fd->track == FD_NO_TRACK) { 1770 int descyl = b_cylinder * fd->ft.steptrac; 1771 do { 1772 /* 1773 * This might be a "ready changed" interrupt, 1774 * which cannot really happen since the 1775 * RDY pin is hardwired to + 5 volts. This 1776 * generally indicates a "bouncing" intr 1777 * line, so do one of the following: 1778 * 1779 * When running on an enhanced FDC that is 1780 * known to not go stuck after responding 1781 * with INVALID, fetch all interrupt states 1782 * until seeing either an INVALID or a 1783 * real interrupt condition. 1784 * 1785 * When running on a dumb old NE765, give 1786 * up immediately. The controller will 1787 * provide up to four dummy RC interrupt 1788 * conditions right after reset (for the 1789 * corresponding four drives), so this is 1790 * our only chance to get notice that it 1791 * was not the FDC that caused the interrupt. 1792 */ 1793 if (fd_sense_int(fdc, &st0, &cyl) 1794 == FD_NOT_VALID) 1795 return 0; 1796 if(fdc->fdct == FDC_NE765 1797 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1798 return 0; /* hope for a real intr */ 1799 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1800 1801 if (0 == descyl) { 1802 int failed = 0; 1803 /* 1804 * seek to cyl 0 requested; make sure we are 1805 * really there 1806 */ 1807 if (fd_sense_drive_status(fdc, &st3)) 1808 failed = 1; 1809 if ((st3 & NE7_ST3_T0) == 0) { 1810 kprintf( 1811 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 1812 fdu, st3, NE7_ST3BITS); 1813 failed = 1; 1814 } 1815 1816 if (failed) { 1817 if(fdc->retry < 3) 1818 fdc->retry = 3; 1819 return (retrier(fdc)); 1820 } 1821 } 1822 1823 if (cyl != descyl) { 1824 kprintf( 1825 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 1826 fdu, descyl, cyl, st0); 1827 if (fdc->retry < 3) 1828 fdc->retry = 3; 1829 return (retrier(fdc)); 1830 } 1831 } 1832 1833 fd->track = b_cylinder; 1834 if (!(fdc->flags & FDC_NODMA)) { 1835 isa_dmastart(isa_dmabp(bp), 1836 bp->b_data+fd->skip, 1837 format ? bp->b_bcount : fdblk, fdc->dmachan); 1838 } 1839 sectrac = fd->ft.sectrac; 1840 sec = blknum % (sectrac * fd->ft.heads); 1841 head = sec / sectrac; 1842 sec = sec % sectrac + 1; 1843 fd->hddrv = ((head&1)<<2)+fdu; 1844 1845 if(format || !read) 1846 { 1847 /* make sure the drive is writable */ 1848 if(fd_sense_drive_status(fdc, &st3) != 0) 1849 { 1850 /* stuck controller? */ 1851 if (!(fdc->flags & FDC_NODMA)) 1852 isa_dmadone(isa_dmabp(bp), 1853 bp->b_data + fd->skip, 1854 format ? bp->b_bcount : fdblk, 1855 fdc->dmachan); 1856 fdc->retry = 6; /* reset the beast */ 1857 return (retrier(fdc)); 1858 } 1859 if(st3 & NE7_ST3_WP) 1860 { 1861 /* 1862 * XXX YES! this is ugly. 1863 * in order to force the current operation 1864 * to fail, we will have to fake an FDC 1865 * error - all error handling is done 1866 * by the retrier() 1867 */ 1868 fdc->status[0] = NE7_ST0_IC_AT; 1869 fdc->status[1] = NE7_ST1_NW; 1870 fdc->status[2] = 0; 1871 fdc->status[3] = fd->track; 1872 fdc->status[4] = head; 1873 fdc->status[5] = sec; 1874 fdc->retry = 8; /* break out immediately */ 1875 fdc->state = IOTIMEDOUT; /* not really... */ 1876 return (1); 1877 } 1878 } 1879 1880 if (format) { 1881 if (fdc->flags & FDC_NODMA) { 1882 /* 1883 * This seems to be necessary for 1884 * whatever obscure reason; if we omit 1885 * it, we end up filling the sector ID 1886 * fields of the newly formatted track 1887 * entirely with garbage, causing 1888 * `wrong cylinder' errors all over 1889 * the place when trying to read them 1890 * back. 1891 * 1892 * Umpf. 1893 */ 1894 SET_BCDR(fdc, 1, bp->b_bcount, 0); 1895 1896 (void)fdcpio(fdc,bp->b_cmd, 1897 bp->b_data+fd->skip, 1898 bp->b_bcount); 1899 1900 } 1901 /* formatting */ 1902 if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu, 1903 finfo->fd_formb_secshift, 1904 finfo->fd_formb_nsecs, 1905 finfo->fd_formb_gaplen, 1906 finfo->fd_formb_fillbyte, 0)) { 1907 /* controller fell over */ 1908 if (!(fdc->flags & FDC_NODMA)) 1909 isa_dmadone(isa_dmabp(bp), 1910 bp->b_data + fd->skip, 1911 format ? bp->b_bcount : fdblk, 1912 fdc->dmachan); 1913 fdc->retry = 6; 1914 return (retrier(fdc)); 1915 } 1916 } else { 1917 if (fdc->flags & FDC_NODMA) { 1918 /* 1919 * this seems to be necessary even when 1920 * reading data 1921 */ 1922 SET_BCDR(fdc, 1, fdblk, 0); 1923 1924 /* 1925 * perform the write pseudo-DMA before 1926 * the WRITE command is sent 1927 */ 1928 if (!read) 1929 (void)fdcpio(fdc,bp->b_cmd, 1930 bp->b_data+fd->skip, 1931 fdblk); 1932 } 1933 if (fd_cmd(fdc, 9, 1934 (read ? NE7CMD_READ : NE7CMD_WRITE), 1935 head << 2 | fdu, /* head & unit */ 1936 fd->track, /* track */ 1937 head, 1938 sec, /* sector + 1 */ 1939 fd->ft.secsize, /* sector size */ 1940 sectrac, /* sectors/track */ 1941 fd->ft.gap, /* gap size */ 1942 fd->ft.datalen, /* data length */ 1943 0)) { 1944 /* the beast is sleeping again */ 1945 if (!(fdc->flags & FDC_NODMA)) 1946 isa_dmadone(isa_dmabp(bp), 1947 bp->b_data + fd->skip, 1948 format ? bp->b_bcount : fdblk, 1949 fdc->dmachan); 1950 fdc->retry = 6; 1951 return (retrier(fdc)); 1952 } 1953 } 1954 if (fdc->flags & FDC_NODMA) 1955 /* 1956 * if this is a read, then simply await interrupt 1957 * before performing PIO 1958 */ 1959 if (read && !fdcpio(fdc,bp->b_cmd, 1960 bp->b_data+fd->skip,fdblk)) { 1961 callout_reset(&fd->tohandle, hz, 1962 fd_iotimeout, fdc); 1963 return(0); /* will return later */ 1964 }; 1965 1966 /* 1967 * write (or format) operation will fall through and 1968 * await completion interrupt 1969 */ 1970 fdc->state = IOCOMPLETE; 1971 callout_reset(&fd->tohandle, hz, fd_iotimeout, fdc); 1972 return (0); /* will return later */ 1973 case PIOREAD: 1974 /* 1975 * actually perform the PIO read. The IOCOMPLETE case 1976 * removes the timeout for us. 1977 */ 1978 (void)fdcpio(fdc,bp->b_cmd,bp->b_data+fd->skip,fdblk); 1979 fdc->state = IOCOMPLETE; 1980 /* FALLTHROUGH */ 1981 case IOCOMPLETE: /* IO DONE, post-analyze */ 1982 callout_stop(&fd->tohandle); 1983 1984 if (fd_read_status(fdc, fd->fdsu)) { 1985 if (!(fdc->flags & FDC_NODMA)) { 1986 isa_dmadone(isa_dmabp(bp), 1987 bp->b_data + fd->skip, 1988 format ? bp->b_bcount : fdblk, 1989 fdc->dmachan); 1990 } 1991 if (fdc->retry < 6) 1992 fdc->retry = 6; /* force a reset */ 1993 return (retrier(fdc)); 1994 } 1995 1996 fdc->state = IOTIMEDOUT; 1997 1998 /* FALLTHROUGH */ 1999 2000 case IOTIMEDOUT: 2001 if (!(fdc->flags & FDC_NODMA)) { 2002 isa_dmadone(isa_dmabp(bp), 2003 bp->b_data + fd->skip, 2004 format ? bp->b_bcount : fdblk, fdc->dmachan); 2005 } 2006 if (fdc->status[0] & NE7_ST0_IC) { 2007 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2008 && fdc->status[1] & NE7_ST1_OR) { 2009 /* 2010 * DMA overrun. Someone hogged the bus and 2011 * didn't release it in time for the next 2012 * FDC transfer. 2013 * 2014 * We normally restart this without bumping 2015 * the retry counter. However, in case 2016 * something is seriously messed up (like 2017 * broken hardware), we rather limit the 2018 * number of retries so the IO operation 2019 * doesn't block indefinately. 2020 */ 2021 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 2022 fdc->state = SEEKCOMPLETE; 2023 return (1); 2024 } /* else fall through */ 2025 } 2026 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 2027 && fdc->retry < 6) 2028 fdc->retry = 6; /* force a reset */ 2029 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2030 && fdc->status[2] & NE7_ST2_WC 2031 && fdc->retry < 3) 2032 fdc->retry = 3; /* force recalibrate */ 2033 return (retrier(fdc)); 2034 } 2035 /* All OK */ 2036 /* Operation successful, retry DMA overruns again next time. */ 2037 fdc->dma_overruns = 0; 2038 fd->skip += fdblk; 2039 if (!format && fd->skip < bp->b_bcount - bp->b_resid) { 2040 /* set up next transfer */ 2041 fdc->state = DOSEEK; 2042 } else { 2043 /* ALL DONE */ 2044 fd->skip = 0; 2045 fdc->bio = NULL; 2046 #if 0 2047 device_unbusy(fd->dev); 2048 #endif 2049 devstat_end_transaction_buf(&fd->device_stats, bp); 2050 biodone(bio); 2051 fdc->fd = (fd_p) 0; 2052 fdc->fdu = -1; 2053 fdc->state = FINDWORK; 2054 } 2055 return (1); 2056 case RESETCTLR: 2057 fdc_reset(fdc); 2058 fdc->retry++; 2059 fdc->state = RESETCOMPLETE; 2060 return (0); 2061 case RESETCOMPLETE: 2062 /* 2063 * Discard all the results from the reset so that they 2064 * can't cause an unexpected interrupt later. 2065 */ 2066 for (i = 0; i < 4; i++) 2067 (void)fd_sense_int(fdc, &st0, &cyl); 2068 fdc->state = STARTRECAL; 2069 /* Fall through. */ 2070 case STARTRECAL: 2071 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 2072 /* arrgl */ 2073 fdc->retry = 6; 2074 return (retrier(fdc)); 2075 } 2076 fdc->state = RECALWAIT; 2077 return (0); /* will return later */ 2078 case RECALWAIT: 2079 /* allow heads to settle */ 2080 callout_reset(&fdc->pseudointr_ch, hz / 8, fd_pseudointr, fdc); 2081 fdc->state = RECALCOMPLETE; 2082 return (0); /* will return later */ 2083 case RECALCOMPLETE: 2084 do { 2085 /* 2086 * See SEEKCOMPLETE for a comment on this: 2087 */ 2088 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2089 return 0; 2090 if(fdc->fdct == FDC_NE765 2091 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2092 return 0; /* hope for a real intr */ 2093 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2094 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2095 { 2096 if(fdc->retry > 3) 2097 /* 2098 * a recalibrate from beyond cylinder 77 2099 * will "fail" due to the FDC limitations; 2100 * since people used to complain much about 2101 * the failure message, try not logging 2102 * this one if it seems to be the first 2103 * time in a line 2104 */ 2105 kprintf("fd%d: recal failed ST0 %b cyl %d\n", 2106 fdu, st0, NE7_ST0BITS, cyl); 2107 if(fdc->retry < 3) fdc->retry = 3; 2108 return (retrier(fdc)); 2109 } 2110 fd->track = 0; 2111 /* Seek (probably) necessary */ 2112 fdc->state = DOSEEK; 2113 return (1); /* will return immediatly */ 2114 case MOTORWAIT: 2115 if(fd->flags & FD_MOTOR_WAIT) 2116 { 2117 return (0); /* time's not up yet */ 2118 } 2119 if (fdc->flags & FDC_NEEDS_RESET) { 2120 fdc->state = RESETCTLR; 2121 fdc->flags &= ~FDC_NEEDS_RESET; 2122 } else { 2123 /* 2124 * If all motors were off, then the controller was 2125 * reset, so it has lost track of the current 2126 * cylinder. Recalibrate to handle this case. 2127 * But first, discard the results of the reset. 2128 */ 2129 fdc->state = RESETCOMPLETE; 2130 } 2131 return (1); /* will return immediatly */ 2132 default: 2133 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2134 if (fd_read_status(fdc, fd->fdsu) == 0) 2135 kprintf("FDC status :%x %x %x %x %x %x %x ", 2136 fdc->status[0], 2137 fdc->status[1], 2138 fdc->status[2], 2139 fdc->status[3], 2140 fdc->status[4], 2141 fdc->status[5], 2142 fdc->status[6] ); 2143 else 2144 kprintf("No status available "); 2145 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2146 { 2147 kprintf("[controller is dead now]\n"); 2148 return (0); 2149 } 2150 kprintf("ST0 = %x, PCN = %x\n", st0, cyl); 2151 return (0); 2152 } 2153 /*XXX confusing: some branches return immediately, others end up here*/ 2154 return (1); /* Come back immediatly to new state */ 2155 } 2156 2157 static int 2158 retrier(struct fdc_data *fdc) 2159 { 2160 struct bio *bio; 2161 struct buf *bp; 2162 struct fd_data *fd; 2163 cdev_t dev; 2164 int fdu; 2165 2166 bio = fdc->bio; 2167 bp = bio->bio_buf; 2168 dev = bio->bio_driver_info; 2169 2170 /* XXX shouldn't this be cached somewhere? */ 2171 fdu = dkunit(dev); 2172 fd = devclass_get_softc(fd_devclass, fdu); 2173 if (fd->options & FDOPT_NORETRY) 2174 goto fail; 2175 2176 switch (fdc->retry) { 2177 case 0: case 1: case 2: 2178 fdc->state = SEEKCOMPLETE; 2179 break; 2180 case 3: case 4: case 5: 2181 fdc->state = STARTRECAL; 2182 break; 2183 case 6: 2184 fdc->state = RESETCTLR; 2185 break; 2186 case 7: 2187 break; 2188 default: 2189 fail: 2190 { 2191 int printerror = (fd->options & FDOPT_NOERRLOG) == 0; 2192 2193 if (printerror) { 2194 /* 2195 * note: use the correct device for more 2196 * verbose error reporting. 2197 */ 2198 diskerr(bio, dev, 2199 "hard error", LOG_PRINTF, 2200 fdc->fd->skip); 2201 } 2202 if (printerror) { 2203 if (fdc->flags & FDC_STAT_VALID) 2204 kprintf( 2205 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2206 fdc->status[0], NE7_ST0BITS, 2207 fdc->status[1], NE7_ST1BITS, 2208 fdc->status[2], NE7_ST2BITS, 2209 fdc->status[3], fdc->status[4], 2210 fdc->status[5]); 2211 else 2212 kprintf(" (No status)\n"); 2213 } 2214 } 2215 bp->b_flags |= B_ERROR; 2216 bp->b_error = EIO; 2217 bp->b_resid += bp->b_bcount - fdc->fd->skip; 2218 fdc->bio = NULL; 2219 fdc->fd->skip = 0; 2220 #if 0 2221 device_unbusy(fd->dev); 2222 #endif 2223 devstat_end_transaction_buf(&fdc->fd->device_stats, bp); 2224 biodone(bio); 2225 fdc->state = FINDWORK; 2226 fdc->flags |= FDC_NEEDS_RESET; 2227 fdc->fd = (fd_p) 0; 2228 fdc->fdu = -1; 2229 return (1); 2230 } 2231 fdc->retry++; 2232 return (1); 2233 } 2234 2235 static int 2236 fdformat(cdev_t dev, struct fd_formb *finfo, struct ucred *cred) 2237 { 2238 fdu_t fdu; 2239 fd_p fd; 2240 struct buf *bp; 2241 int rv = 0; 2242 size_t fdblk; 2243 2244 fdu = dkunit(dev); 2245 fd = devclass_get_softc(fd_devclass, fdu); 2246 fdblk = 128 << fd->ft.secsize; 2247 2248 /* set up a buffer header for fdstrategy() */ 2249 bp = getpbuf(NULL); 2250 bp->b_cmd = BUF_CMD_FORMAT; 2251 2252 /* 2253 * calculate a fake blkno, so fdstrategy() would initiate a 2254 * seek to the requested cylinder 2255 */ 2256 bp->b_bio1.bio_offset = (off_t)(finfo->cyl * 2257 (fd->ft.sectrac * fd->ft.heads) 2258 + finfo->head * fd->ft.sectrac) * fdblk; 2259 bp->b_bio1.bio_driver_info = dev; 2260 bp->b_bio1.bio_flags |= BIO_SYNC; 2261 bp->b_bio1.bio_done = biodone_sync; 2262 2263 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; 2264 bp->b_data = (caddr_t)finfo; 2265 2266 /* now do the format */ 2267 dev_dstrategy(dev, &bp->b_bio1); 2268 2269 /* ...and wait for it to complete */ 2270 rv = biowait_timeout(&bp->b_bio1, "fdform", 20 * hz); 2271 if (rv == EWOULDBLOCK) { 2272 /* timed out */ 2273 rv = EIO; 2274 #if 0 2275 device_unbusy(fd->dev); 2276 #endif 2277 biodone(&bp->b_bio1); 2278 } 2279 if (bp->b_flags & B_ERROR) 2280 rv = bp->b_error; 2281 /* 2282 * allow the process to be swapped 2283 */ 2284 relpbuf(bp, NULL); 2285 return rv; 2286 } 2287 2288 /* 2289 * TODO: don't allocate buffer on stack. 2290 */ 2291 2292 static int 2293 fdioctl(struct dev_ioctl_args *ap) 2294 { 2295 cdev_t dev = ap->a_head.a_dev; 2296 fdu_t fdu = dkunit(dev); 2297 fd_p fd = devclass_get_softc(fd_devclass, fdu); 2298 struct fdc_status *fsp; 2299 int error = 0; 2300 2301 switch (ap->a_cmd) { 2302 case FD_FORM: 2303 if ((ap->a_fflag & FWRITE) == 0) 2304 error = EBADF; /* must be opened for writing */ 2305 else if (((struct fd_formb *)ap->a_data)->format_version != 2306 FD_FORMAT_VERSION) 2307 error = EINVAL; /* wrong version of formatting prog */ 2308 else 2309 error = fdformat(dev, (struct fd_formb *)ap->a_data, ap->a_cred); 2310 break; 2311 2312 case FD_GTYPE: /* get drive type */ 2313 *(struct fd_type *)ap->a_data = fd->ft; 2314 break; 2315 2316 case FD_STYPE: /* set drive type */ 2317 /* this is considered harmful; only allow for superuser */ 2318 if (priv_check_cred(ap->a_cred, PRIV_ROOT, 0) != 0) 2319 return EPERM; 2320 fd->ft = *(struct fd_type *)ap->a_data; 2321 break; 2322 2323 case FD_GOPTS: /* get drive options */ 2324 *(int *)ap->a_data = fd->options; 2325 break; 2326 2327 case FD_SOPTS: /* set drive options */ 2328 fd->options = *(int *)ap->a_data; 2329 break; 2330 2331 case FD_GSTAT: 2332 fsp = (struct fdc_status *)ap->a_data; 2333 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2334 return EINVAL; 2335 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2336 break; 2337 2338 default: 2339 error = ENOTTY; 2340 break; 2341 } 2342 return (error); 2343 } 2344 2345 /* 2346 * Hello emacs, these are the 2347 * Local Variables: 2348 * c-indent-level: 8 2349 * c-continued-statement-offset: 8 2350 * c-continued-brace-offset: 0 2351 * c-brace-offset: -8 2352 * c-brace-imaginary-offset: 0 2353 * c-argdecl-indent: 8 2354 * c-label-offset: -8 2355 * c++-hanging-braces: 1 2356 * c++-access-specifier-offset: -8 2357 * c++-empty-arglist-indent: 8 2358 * c++-friend-offset: 0 2359 * End: 2360 */ 2361