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.heep.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 * $FreeBSD$ 54 */ 55 56#include "opt_fdc.h" 57 58#include <sys/param.h> 59#include <sys/bio.h> 60#include <sys/bus.h> 61#include <sys/devicestat.h> 62#include <sys/disk.h> 63#include <sys/fcntl.h> 64#include <sys/fdcio.h> 65#include <sys/filio.h> 66#include <sys/kernel.h> 67#include <sys/lock.h> 68#include <sys/malloc.h> 69#include <sys/module.h> 70#include <sys/mutex.h> 71#include <sys/priv.h> 72#include <sys/proc.h> 73#include <sys/rman.h> 74#include <sys/systm.h> 75 76#include <machine/bus.h> 77#include <machine/stdarg.h> 78 79#ifdef PC98 80#include <isa/isavar.h> 81#include <pc98/cbus/fdcreg.h> 82#include <pc98/cbus/fdcvar.h> 83#include <pc98/pc98/pc98_machdep.h> 84#else 85#include <isa/isavar.h> 86#include <isa/isareg.h> 87#include <dev/fdc/fdcreg.h> 88#include <dev/fdc/fdcvar.h> 89#include <isa/rtc.h> 90#endif 91 92#define FDBIO_FORMAT BIO_CMD2 93 94/* configuration flags for fdc */ 95#define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */ 96 97/* 98 * Stop retrying after this many DMA overruns. Since each retry takes 99 * one revolution, with 300 rpm., 25 retries take approximately 5 100 * seconds which the read attempt will block in case the DMA overrun 101 * is persistent. 102 */ 103#define FDC_DMAOV_MAX 25 104 105/* 106 * Timeout value for the PIO loops to wait until the FDC main status 107 * register matches our expectations (request for master, direction 108 * bit). This is supposed to be a number of microseconds, although 109 * timing might actually not be very accurate. 110 * 111 * Timeouts of 100 msec are believed to be required for some broken 112 * (old) hardware. 113 */ 114#define FDSTS_TIMEOUT 100000 115 116/* 117 * Number of subdevices that can be used for different density types. 118 */ 119#ifdef PC98 120#define NUMDENS 12 121#else 122#define NUMDENS 16 123#endif 124 125#define FDBIO_RDSECTID BIO_CMD1 126 127/* 128 * List of native drive densities. Order must match enum fd_drivetype 129 * in <sys/fdcio.h>. Upon attaching the drive, each of the 130 * programmable subdevices is initialized with the native density 131 * definition. 132 */ 133#ifdef PC98 134static struct fd_type fd_native_types[] = 135{ 136{ 0 }, /* FDT_NONE */ 137{ 0 }, /* FDT_360K */ 138{ 15,2,0xFF,0x1B,80,2400,0,2,0x54,1,0,FL_MFM }, /* FDT_12M */ 139{ 0 }, /* FDT_720K */ 140{ 18,2,0xFF,0x1B,80,2880,2,2,0x54,1,0,FL_MFM }, /* FDT_144M */ 141{ 0 }, /* FDT_288M */ 142}; 143 144static struct fd_type fd_searchlist_12m[] = { 145{ 15,2,0xFF,0x1B,80,2400,0,2,0x54,1,0,FL_MFM }, /* 1.2M */ 146#if 0 147{ 10,2,0xFF,0x10,82,1640,1,2,0x30,1,0,FL_MFM }, /* 820K */ 148{ 10,2,0xFF,0x10,80,1600,1,2,0x30,1,0,FL_MFM }, /* 800K */ 149#endif 150{ 9,2,0xFF,0x20,80,1440,1,2,0x50,1,0,FL_MFM }, /* 720K */ 151{ 9,2,0xFF,0x20,40, 720,1,2,0x50,1,0,FL_MFM|FL_2STEP },/* 360K */ 152{ 8,2,0xFF,0x2A,80,1280,1,2,0x50,1,0,FL_MFM }, /* 640K */ 153{ 8,3,0xFF,0x35,77,1232,0,2,0x74,1,0,FL_MFM }, /* 1.23M 1024/sec */ 154#if 0 155{ 8,3,0xFF,0x35,80,1280,0,2,0x74,1,0,FL_MFM }, /* 1.28M 1024/sec */ 156#endif 157}; 158static struct fd_type fd_searchlist_144m[] = { 159#if 0 160{ 21,2,0xFF,0x04,82,3444,2,2,0x0C,2,0,FL_MFM }, /* 1.72M in 3mode */ 161{ 18,2,0xFF,0x1B,82,2952,2,2,0x54,1,0,FL_MFM }, /* 1.48M in 3mode */ 162#endif 163{ 18,2,0xFF,0x1B,80,2880,2,2,0x54,1,0,FL_MFM }, /* 1.44M in 3mode */ 164{ 15,2,0xFF,0x1B,80,2400,0,2,0x54,1,0,FL_MFM }, /* 1.2M */ 165#if 0 166{ 10,2,0xFF,0x10,82,1640,1,2,0x30,1,0,FL_MFM }, /* 820K */ 167{ 10,2,0xFF,0x10,80,1600,1,2,0x30,1,0,FL_MFM }, /* 800K */ 168#endif 169{ 9,2,0xFF,0x20,80,1440,1,2,0x50,1,0,FL_MFM }, /* 720K */ 170{ 9,2,0xFF,0x20,40, 720,1,2,0x50,1,0,FL_MFM|FL_2STEP },/* 360K */ 171{ 8,2,0xFF,0x2A,80,1280,1,2,0x50,1,0,FL_MFM }, /* 640K */ 172{ 8,3,0xFF,0x35,77,1232,0,2,0x74,1,0,FL_MFM }, /* 1.23M 1024/sec */ 173#if 0 174{ 8,3,0xFF,0x35,80,1280,0,2,0x74,1,0,FL_MFM }, /* 1.28M 1024/sec */ 175{ 9,3,0xFF,0x35,82,1476,0,2,0x47,1,0,FL_MFM }, /* 1.48M 1024/sec 9sec */ 176{ 10,3,0xFF,0x1B,82,1640,2,2,0x54,1,0,FL_MFM }, /* 1.64M in 3mode - Reserve */ 177#endif 178}; 179#else /* PC98 */ 180static struct fd_type fd_native_types[] = 181{ 182{ 0 }, /* FDT_NONE */ 183{ 9,2,0xFF,0x2A,40, 720,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_360K */ 184{ 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* FDT_12M */ 185{ 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_720K */ 186{ 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */ 187#if 0 /* we currently don't handle 2.88 MB */ 188{ 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /*FDT_288M*/ 189#else 190{ 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */ 191#endif 192}; 193 194/* 195 * 360 KB 5.25" and 720 KB 3.5" drives don't have automatic density 196 * selection, they just start out with their native density (or lose). 197 * So 1.2 MB 5.25", 1.44 MB 3.5", and 2.88 MB 3.5" drives have their 198 * respective lists of densities to search for. 199 */ 200static struct fd_type fd_searchlist_12m[] = { 201{ 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* 1.2M */ 202{ 9,2,0xFF,0x23,40, 720,FDC_300KBPS,2,0x50,1,0,FL_MFM|FL_2STEP }, /* 360K */ 203{ 9,2,0xFF,0x20,80,1440,FDC_300KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 204}; 205 206static struct fd_type fd_searchlist_144m[] = { 207{ 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */ 208{ 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 209}; 210 211/* We search for 1.44M first since this is the most common case. */ 212static struct fd_type fd_searchlist_288m[] = { 213{ 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */ 214#if 0 215{ 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /* 2.88M */ 216#endif 217{ 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */ 218}; 219#endif /* PC98 */ 220 221#define MAX_SEC_SIZE (128 << 3) 222#define MAX_CYLINDER 85 /* some people really stress their drives 223 * up to cyl 82 */ 224#define MAX_HEAD 1 225 226devclass_t fdc_devclass; 227 228/* 229 * Per drive structure (softc). 230 */ 231struct fd_data { 232 struct fdc_data *fdc; /* pointer to controller structure */ 233 int fdsu; /* this units number on this controller */ 234 enum fd_drivetype type; /* drive type */ 235 struct fd_type *ft; /* pointer to current type descriptor */ 236 struct fd_type fts[NUMDENS]; /* type descriptors */ 237 int flags; 238#define FD_OPEN 0x01 /* it's open */ 239#define FD_NONBLOCK 0x02 /* O_NONBLOCK set */ 240#define FD_ACTIVE 0x04 /* it's active */ 241#define FD_MOTOR 0x08 /* motor should be on */ 242#define FD_MOTOR_WAIT 0x10 /* motor coming up */ 243#define FD_UA 0x20 /* force unit attention */ 244 int skip; 245 int hddrv; 246#define FD_NO_TRACK -2 247 int track; /* where we think the head is */ 248 int options; /* user configurable options, see fdcio.h */ 249 struct callout_handle toffhandle; 250 struct callout_handle tohandle; 251 struct devstat *device_stats; 252 struct cdev *masterdev; 253 device_t dev; 254 fdu_t fdu; 255#ifdef PC98 256 int pc98_trans; 257#endif 258}; 259 260struct fdc_ivars { 261 int fdunit; 262 int fdtype; 263}; 264 265static devclass_t fd_devclass; 266 267/* configuration flags for fd */ 268#define FD_TYPEMASK 0x0f /* drive type, matches enum 269 * fd_drivetype; on i386 machines, if 270 * given as 0, use RTC type for fd0 271 * and fd1 */ 272#define FD_DTYPE(flags) ((flags) & FD_TYPEMASK) 273#define FD_NO_CHLINE 0x10 /* drive does not support changeline 274 * aka. unit attention */ 275#define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just 276 * assume it is there */ 277 278/* 279 * Throughout this file the following conventions will be used: 280 * 281 * fd is a pointer to the fd_data struct for the drive in question 282 * fdc is a pointer to the fdc_data struct for the controller 283 * fdu is the floppy drive unit number 284 * fdcu is the floppy controller unit number 285 * fdsu is the floppy drive unit number on that controller. (sub-unit) 286 */ 287 288/* 289 * Function declarations, same (chaotic) order as they appear in the 290 * file. Re-ordering is too late now, it would only obfuscate the 291 * diffs against old and offspring versions (like the PC98 one). 292 * 293 * Anyone adding functions here, please keep this sequence the same 294 * as below -- makes locating a particular function in the body much 295 * easier. 296 */ 297static u_int8_t fdsts_rd(fdc_p); 298static void fddata_wr(fdc_p, u_int8_t); 299static u_int8_t fddata_rd(fdc_p); 300static int fdc_err(struct fdc_data *, const char *); 301static int enable_fifo(fdc_p fdc); 302static int fd_sense_drive_status(fdc_p, int *); 303static int fd_sense_int(fdc_p, int *, int *); 304static int fd_read_status(fdc_p); 305static int fd_probe(device_t); 306static int fd_attach(device_t); 307static int fd_detach(device_t); 308static void set_motor(struct fdc_data *, int, int); 309# define TURNON 1 310# define TURNOFF 0 311static timeout_t fd_turnoff; 312static timeout_t fd_motor_on; 313static void fd_turnon(struct fd_data *); 314static void fdc_reset(fdc_p); 315static int fd_in(struct fdc_data *, int *); 316static int out_fdc(struct fdc_data *, int); 317static d_open_t fdopen; 318static d_close_t fdclose; 319static d_strategy_t fdstrategy; 320static void fdstart(struct fdc_data *); 321static timeout_t fd_iotimeout; 322static timeout_t fd_pseudointr; 323static driver_intr_t fdc_intr; 324static int fdcpio(fdc_p, long, caddr_t, u_int); 325static int fdautoselect(struct cdev *); 326static int fdstate(struct fdc_data *); 327static int retrier(struct fdc_data *); 328static void fdbiodone(struct bio *); 329static int fdmisccmd(struct cdev *, u_int, void *); 330static d_ioctl_t fdioctl; 331 332static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */ 333 334#ifdef FDC_DEBUG 335/* CAUTION: fd_debug causes huge amounts of logging output */ 336static int volatile fd_debug = 0; 337#define TRACE0(arg) do { if (fd_debug) printf(arg); } while (0) 338#define TRACE1(arg1, arg2) do { if (fd_debug) printf(arg1, arg2); } while (0) 339#else /* FDC_DEBUG */ 340#define TRACE0(arg) do { } while (0) 341#define TRACE1(arg1, arg2) do { } while (0) 342#endif /* FDC_DEBUG */ 343 344/* 345 * Bus space handling (access to low-level IO). 346 */ 347#ifndef PC98 348void 349fdout_wr(fdc_p fdc, u_int8_t v) 350{ 351 bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v); 352} 353#endif 354 355static u_int8_t 356fdsts_rd(fdc_p fdc) 357{ 358 return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off); 359} 360 361static void 362fddata_wr(fdc_p fdc, u_int8_t v) 363{ 364 bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v); 365} 366 367static u_int8_t 368fddata_rd(fdc_p fdc) 369{ 370 return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off); 371} 372 373#ifdef PC98 374static void 375fdctl_wr(fdc_p fdc, u_int8_t v) 376{ 377 bus_space_write_1(fdc->portt, fdc->porth, FDCTL, v); 378} 379#endif 380 381#ifndef PC98 382static u_int8_t 383fdin_rd(fdc_p fdc) 384{ 385 return bus_space_read_1(fdc->portt, fdc->porth, FDIN); 386} 387#endif /* PC98 */ 388 389static struct cdevsw fd_cdevsw = { 390 .d_version = D_VERSION, 391 .d_open = fdopen, 392 .d_close = fdclose, 393 .d_read = physread, 394 .d_write = physwrite, 395 .d_ioctl = fdioctl, 396 .d_strategy = fdstrategy, 397 .d_name = "fd", 398 .d_flags = D_DISK | D_NEEDGIANT, 399}; 400 401/* 402 * Auxiliary functions. Well, some only. Others are scattered 403 * throughout the entire file. 404 */ 405static int 406fdc_err(struct fdc_data *fdc, const char *s) 407{ 408 fdc->fdc_errs++; 409 if (s) { 410 if (fdc->fdc_errs < FDC_ERRMAX) 411 device_printf(fdc->fdc_dev, "%s", s); 412 else if (fdc->fdc_errs == FDC_ERRMAX) 413 device_printf(fdc->fdc_dev, "too many errors, not " 414 "logging any more\n"); 415 } 416 417 return FD_FAILED; 418} 419 420/* 421 * fd_cmd: Send a command to the chip. Takes a varargs with this structure: 422 * Unit number, 423 * # of output bytes, output bytes as ints ..., 424 * # of input bytes, input bytes as ints ... 425 */ 426int 427fd_cmd(struct fdc_data *fdc, int n_out, ...) 428{ 429 u_char cmd; 430 int n_in; 431 int n; 432 va_list ap; 433 434 va_start(ap, n_out); 435 cmd = (u_char)(va_arg(ap, int)); 436 va_end(ap); 437 va_start(ap, n_out); 438 for (n = 0; n < n_out; n++) 439 { 440 if (out_fdc(fdc, va_arg(ap, int)) < 0) 441 { 442 char msg[50]; 443 snprintf(msg, sizeof(msg), 444 "cmd %x failed at out byte %d of %d\n", 445 cmd, n + 1, n_out); 446 return fdc_err(fdc, msg); 447 } 448 } 449 n_in = va_arg(ap, int); 450 for (n = 0; n < n_in; n++) 451 { 452 int *ptr = va_arg(ap, int *); 453 if (fd_in(fdc, ptr) < 0) 454 { 455 char msg[50]; 456 snprintf(msg, sizeof(msg), 457 "cmd %02x failed at in byte %d of %d\n", 458 cmd, n + 1, n_in); 459 return fdc_err(fdc, msg); 460 } 461 } 462 463 return 0; 464} 465 466static int 467enable_fifo(fdc_p fdc) 468{ 469 int i, j; 470 471 if ((fdc->flags & FDC_HAS_FIFO) == 0) { 472 473 /* 474 * Cannot use fd_cmd the normal way here, since 475 * this might be an invalid command. Thus we send the 476 * first byte, and check for an early turn of data directon. 477 */ 478 479 if (out_fdc(fdc, I8207X_CONFIG) < 0) 480 return fdc_err(fdc, "Enable FIFO failed\n"); 481 482 /* If command is invalid, return */ 483 j = FDSTS_TIMEOUT; 484 while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM)) 485 != NE7_RQM && j-- > 0) { 486 if (i == (NE7_DIO | NE7_RQM)) { 487 fdc_reset(fdc); 488 return FD_FAILED; 489 } 490 DELAY(1); 491 } 492 if (j<0 || 493 fd_cmd(fdc, 3, 494 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) { 495 fdc_reset(fdc); 496 return fdc_err(fdc, "Enable FIFO failed\n"); 497 } 498 fdc->flags |= FDC_HAS_FIFO; 499 return 0; 500 } 501 if (fd_cmd(fdc, 4, 502 I8207X_CONFIG, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) 503 return fdc_err(fdc, "Re-enable FIFO failed\n"); 504 return 0; 505} 506 507static int 508fd_sense_drive_status(fdc_p fdc, int *st3p) 509{ 510 int st3; 511 512 if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3)) 513 { 514 return fdc_err(fdc, "Sense Drive Status failed\n"); 515 } 516 if (st3p) 517 *st3p = st3; 518 519 return 0; 520} 521 522static int 523fd_sense_int(fdc_p fdc, int *st0p, int *cylp) 524{ 525 int cyl, st0, ret; 526 527 ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0); 528 if (ret) { 529 (void)fdc_err(fdc, 530 "sense intr err reading stat reg 0\n"); 531 return ret; 532 } 533 534 if (st0p) 535 *st0p = st0; 536 537 if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) { 538 /* 539 * There doesn't seem to have been an interrupt. 540 */ 541 return FD_NOT_VALID; 542 } 543 544 if (fd_in(fdc, &cyl) < 0) { 545 return fdc_err(fdc, "can't get cyl num\n"); 546 } 547 548 if (cylp) 549 *cylp = cyl; 550 551 return 0; 552} 553 554 555static int 556fd_read_status(fdc_p fdc) 557{ 558 int i, ret; 559 560 for (i = ret = 0; i < 7; i++) { 561 /* 562 * XXX types are poorly chosen. Only bytes can be read 563 * from the hardware, but fdc->status[] wants u_ints and 564 * fd_in() gives ints. 565 */ 566 int status; 567 568 ret = fd_in(fdc, &status); 569 fdc->status[i] = status; 570 if (ret != 0) 571 break; 572 } 573 574 if (ret == 0) 575 fdc->flags |= FDC_STAT_VALID; 576 else 577 fdc->flags &= ~FDC_STAT_VALID; 578 579 return ret; 580} 581 582#ifdef PC98 583static int pc98_trans = 0; /* 0 : HD , 1 : DD , 2 : 1.44 */ 584static int pc98_trans_prev = -1; 585 586static void set_density(fdc_p fdc) 587{ 588 /* always motor on */ 589 bus_space_write_1(fdc->sc_fdsiot, fdc->sc_fdsioh, 0, 590 (pc98_trans != 1 ? FDP_FDDEXC : 0) | FDP_PORTEXC); 591 DELAY(100); 592 fdctl_wr(fdc, FDC_RST | FDC_DMAE); 593 /* in the case of note W, always inhibit 100ms timer */ 594} 595 596static int pc98_fd_check_ready(fdu_t fdu) 597{ 598 fd_p fd = devclass_get_softc(fd_devclass, fdu); 599 struct fdc_data *fdc = fd->fdc; 600 int retry = 0, status; 601 602 while (retry++ < 30000) { 603 set_motor(fdc, fd->fdsu, TURNON); 604 out_fdc(fdc, NE7CMD_SENSED); /* Sense Drive Status */ 605 DELAY(100); 606 out_fdc(fdc, fdu); /* Drive number */ 607 DELAY(100); 608 if ((fd_in(fdc, &status) == 0) && (status & NE7_ST3_RD)) { 609 fdctl_wr(fdc, FDC_DMAE | FDC_MTON); 610 DELAY(10); 611 return 0; 612 } 613 } 614 return -1; 615} 616 617static void pc98_fd_check_type(struct fd_data *fd) 618{ 619 struct fdc_data *fdc; 620 621 if (fd->type != FDT_NONE || fd->fdu < 0 || fd->fdu > 3) 622 return; 623 624 fdc = fd->fdc; 625 626 /* Look up what the BIOS thinks we have. */ 627 if (!((PC98_SYSTEM_PARAMETER(0x55c) >> fd->fdu) & 0x01)) { 628 fd->type = FDT_NONE; 629 return; 630 } 631 if ((PC98_SYSTEM_PARAMETER(0x5ae) >> fd->fdu) & 0x01) { 632 /* Check 3mode I/F */ 633 fd->pc98_trans = 0; 634 bus_space_write_1(fdc->sc_fdemsiot, fdc->sc_fdemsioh, 0, 635 (fd->fdu << 5) | 0x10); 636 if (!(bus_space_read_1(fdc->sc_fdemsiot, fdc->sc_fdemsioh, 0) & 637 0x01)) { 638 fd->type = FDT_144M; 639 return; 640 } 641 device_printf(fd->dev, 642 "Warning: can't control 3mode I/F, fallback to 2mode.\n"); 643 } 644 645 fd->type = FDT_12M; 646} 647#endif /* PC98 */ 648 649void 650fdc_release_resources(struct fdc_data *fdc) 651{ 652 device_t dev; 653 654 dev = fdc->fdc_dev; 655 if (fdc->fdc_intr) { 656 bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr); 657 fdc->fdc_intr = NULL; 658 } 659 if (fdc->res_irq != 0) { 660 bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq, 661 fdc->res_irq); 662 fdc->res_irq = NULL; 663 } 664#ifndef PC98 665 if (fdc->res_ctl != 0) { 666 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl, 667 fdc->res_ctl); 668 fdc->res_ctl = NULL; 669 } 670#endif 671#ifdef PC98 672 if (fdc->res_fdsio != 0) { 673 bus_release_resource(dev, SYS_RES_IOPORT, 3, fdc->res_fdsio); 674 fdc->res_fdsio = NULL; 675 } 676 if (fdc->res_fdemsio != 0) { 677 bus_release_resource(dev, SYS_RES_IOPORT, 4, fdc->res_fdemsio); 678 fdc->res_fdemsio = NULL; 679 } 680#endif 681 if (fdc->res_ioport != 0) { 682 bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 683 fdc->res_ioport); 684 fdc->res_ioport = NULL; 685 } 686 if (fdc->res_drq != 0) { 687 bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq, 688 fdc->res_drq); 689 fdc->res_drq = NULL; 690 } 691} 692 693/* 694 * Configuration/initialization stuff, per controller. 695 */ 696 697int 698fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 699{ 700 struct fdc_ivars *ivars = device_get_ivars(child); 701 702 switch (which) { 703 case FDC_IVAR_FDUNIT: 704 *result = ivars->fdunit; 705 break; 706 case FDC_IVAR_FDTYPE: 707 *result = ivars->fdtype; 708 break; 709 default: 710 return (ENOENT); 711 } 712 return (0); 713} 714 715int 716fdc_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 717{ 718 struct fdc_ivars *ivars = device_get_ivars(child); 719 720 switch (which) { 721 case FDC_IVAR_FDUNIT: 722 ivars->fdunit = value; 723 break; 724 case FDC_IVAR_FDTYPE: 725 ivars->fdtype = value; 726 break; 727 default: 728 return (ENOENT); 729 } 730 return (0); 731} 732 733int 734fdc_initial_reset(struct fdc_data *fdc) 735{ 736#ifdef PC98 737 /* see if it can handle a command */ 738 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(4, 240), 739 NE7_SPEC_2(2, 0), 0)) 740 return (ENXIO); 741#else 742 /* First, reset the floppy controller. */ 743 fdout_wr(fdc, 0); 744 DELAY(100); 745 fdout_wr(fdc, FDO_FRST); 746 747 /* Then, see if it can handle a command. */ 748 if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), 749 NE7_SPEC_2(2, 0), 0)) 750 return (ENXIO); 751#endif 752 return (0); 753} 754 755int 756fdc_detach(device_t dev) 757{ 758 struct fdc_data *fdc; 759 int error; 760 761 fdc = device_get_softc(dev); 762 763 /* have our children detached first */ 764 if ((error = bus_generic_detach(dev))) 765 return (error); 766 767#ifdef PC98 768 /* reset controller, turn motor off */ 769 fdc_reset(fdc); 770#else 771 /* reset controller, turn motor off */ 772 fdout_wr(fdc, 0); 773#endif 774 775 fdc_release_resources(fdc); 776 return (0); 777} 778 779/* 780 * Add a child device to the fdc controller. It will then be probed etc. 781 */ 782device_t 783fdc_add_child(device_t dev, const char *name, int unit) 784{ 785 struct fdc_ivars *ivar; 786 device_t child; 787 788 ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO); 789 if (ivar == NULL) 790 return (NULL); 791 child = device_add_child(dev, name, unit); 792 if (child == NULL) { 793 free(ivar, M_DEVBUF); 794 return (NULL); 795 } 796 device_set_ivars(child, ivar); 797 ivar->fdunit = unit; 798 ivar->fdtype = FDT_NONE; 799 if (resource_disabled(name, unit)) 800 device_disable(child); 801 return (child); 802} 803 804int 805fdc_attach(device_t dev) 806{ 807 struct fdc_data *fdc; 808 int error; 809 810 fdc = device_get_softc(dev); 811 fdc->fdc_dev = dev; 812 error = bus_setup_intr(dev, fdc->res_irq, 813 INTR_TYPE_BIO | INTR_ENTROPY, NULL, fdc_intr, fdc, 814 &fdc->fdc_intr); 815 if (error) { 816 device_printf(dev, "cannot setup interrupt\n"); 817 return error; 818 } 819 fdc->fdcu = device_get_unit(dev); 820 fdc->flags |= FDC_NEEDS_RESET; 821 822 fdc->state = DEVIDLE; 823 824#ifdef PC98 825 /* reset controller, turn motor off, clear fdout mirror reg */ 826 fdc_reset(fdc); 827#else 828 /* reset controller, turn motor off, clear fdout mirror reg */ 829 fdout_wr(fdc, fdc->fdout = 0); 830#endif 831 bioq_init(&fdc->head); 832 833 return (0); 834} 835 836int 837fdc_hints_probe(device_t dev) 838{ 839 const char *name, *dname; 840 int i, error, dunit; 841 842 /* 843 * Probe and attach any children. We should probably detect 844 * devices from the BIOS unless overridden. 845 */ 846 name = device_get_nameunit(dev); 847 i = 0; 848 while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) { 849 resource_int_value(dname, dunit, "drive", &dunit); 850 fdc_add_child(dev, dname, dunit); 851 } 852 853 if ((error = bus_generic_attach(dev)) != 0) 854 return (error); 855 return (0); 856} 857 858int 859fdc_print_child(device_t me, device_t child) 860{ 861 int retval = 0, flags; 862 863 retval += bus_print_child_header(me, child); 864 retval += printf(" on %s drive %d", device_get_nameunit(me), 865 fdc_get_fdunit(child)); 866 if ((flags = device_get_flags(me)) != 0) 867 retval += printf(" flags %#x", flags); 868 retval += printf("\n"); 869 870 return (retval); 871} 872 873/* 874 * Configuration/initialization, per drive. 875 */ 876static int 877fd_probe(device_t dev) 878{ 879 int i; 880#ifndef PC98 881 u_int st0, st3; 882#endif 883 struct fd_data *fd; 884 struct fdc_data *fdc; 885 fdsu_t fdsu; 886 int flags, type; 887 888 fdsu = fdc_get_fdunit(dev); 889 fd = device_get_softc(dev); 890 fdc = device_get_softc(device_get_parent(dev)); 891 flags = device_get_flags(dev); 892 893 fd->dev = dev; 894 fd->fdc = fdc; 895 fd->fdsu = fdsu; 896 fd->fdu = device_get_unit(dev); 897 898 /* Auto-probe if fdinfo is present, but always allow override. */ 899 type = FD_DTYPE(flags); 900 if (type == FDT_NONE && (type = fdc_get_fdtype(dev)) != FDT_NONE) { 901 fd->type = type; 902 goto done; 903 } else { 904 /* make sure fdautoselect() will be called */ 905 fd->flags = FD_UA; 906 fd->type = type; 907 } 908 909#ifdef PC98 910 pc98_fd_check_type(fd); 911#else 912/* 913 * XXX I think using __i386__ is wrong here since we actually want to probe 914 * for the machine type, not the CPU type (so non-PC arch's like the PC98 will 915 * fail the probe). 916 */ 917#ifdef __i386__ 918 if (fd->type == FDT_NONE && (fd->fdu == 0 || fd->fdu == 1)) { 919 /* Look up what the BIOS thinks we have. */ 920 if (fd->fdu == 0) { 921 if ((fdc->flags & FDC_ISPCMCIA)) 922 /* 923 * Somewhat special. No need to force the 924 * user to set device flags, since the Y-E 925 * Data PCMCIA floppy is always a 1.44 MB 926 * device. 927 */ 928 fd->type = FDT_144M; 929 else 930 fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4; 931 } else { 932 fd->type = rtcin(RTC_FDISKETTE) & 0x0f; 933 } 934 if (fd->type == FDT_288M_1) 935 fd->type = FDT_288M; 936 } 937#endif /* __i386__ */ 938#endif /* PC98 */ 939 940 /* is there a unit? */ 941 if (fd->type == FDT_NONE) 942 return (ENXIO); 943 944#ifndef PC98 945 /* select it */ 946 set_motor(fdc, fdsu, TURNON); 947 fdc_reset(fdc); /* XXX reset, then unreset, etc. */ 948 DELAY(1000000); /* 1 sec */ 949 950 if ((flags & FD_NO_PROBE) == 0) { 951 /* If we're at track 0 first seek inwards. */ 952 if ((fd_sense_drive_status(fdc, &st3) == 0) && 953 (st3 & NE7_ST3_T0)) { 954 /* Seek some steps... */ 955 if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) { 956 /* ...wait a moment... */ 957 DELAY(300000); 958 /* make ctrlr happy: */ 959 fd_sense_int(fdc, 0, 0); 960 } 961 } 962 963 for (i = 0; i < 2; i++) { 964 /* 965 * we must recalibrate twice, just in case the 966 * heads have been beyond cylinder 76, since 967 * most FDCs still barf when attempting to 968 * recalibrate more than 77 steps 969 */ 970 /* go back to 0: */ 971 if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) { 972 /* a second being enough for full stroke seek*/ 973 DELAY(i == 0 ? 1000000 : 300000); 974 975 /* anything responding? */ 976 if (fd_sense_int(fdc, &st0, 0) == 0 && 977 (st0 & NE7_ST0_EC) == 0) 978 break; /* already probed succesfully */ 979 } 980 } 981 } 982 983 set_motor(fdc, fdsu, TURNOFF); 984 985 if ((flags & FD_NO_PROBE) == 0 && 986 (st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */ 987 return (ENXIO); 988#endif /* PC98 */ 989 990done: 991#ifndef PC98 992 /* This doesn't work before the first reset. */ 993 if ((fdc->flags & FDC_HAS_FIFO) == 0 && 994 fdc->fdct == FDC_ENHANCED && 995 (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0 && 996 enable_fifo(fdc) == 0) { 997 device_printf(device_get_parent(dev), 998 "FIFO enabled, %d bytes threshold\n", fifo_threshold); 999 } 1000#endif /* PC98 */ 1001 1002#ifdef PC98 1003 switch (fd->type) { 1004 case FDT_144M: 1005 device_set_desc(dev, "1.44M FDD"); 1006 break; 1007 case FDT_12M: 1008 device_set_desc(dev, "1M/640K FDD"); 1009 break; 1010 default: 1011 return (ENXIO); 1012 } 1013#else 1014 switch (fd->type) { 1015 case FDT_12M: 1016 device_set_desc(dev, "1200-KB 5.25\" drive"); 1017 break; 1018 case FDT_144M: 1019 device_set_desc(dev, "1440-KB 3.5\" drive"); 1020 break; 1021 case FDT_288M: 1022 device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)"); 1023 break; 1024 case FDT_360K: 1025 device_set_desc(dev, "360-KB 5.25\" drive"); 1026 break; 1027 case FDT_720K: 1028 device_set_desc(dev, "720-KB 3.5\" drive"); 1029 break; 1030 default: 1031 return (ENXIO); 1032 } 1033#endif 1034 fd->track = FD_NO_TRACK; 1035 fd->fdc = fdc; 1036 fd->fdsu = fdsu; 1037 fd->options = 0; 1038#ifdef PC98 1039 fd->pc98_trans = 0; 1040#endif 1041 callout_handle_init(&fd->toffhandle); 1042 callout_handle_init(&fd->tohandle); 1043 1044 /* initialize densities for subdevices */ 1045#ifdef PC98 1046 for (i = 0; i < NUMDENS; i++) 1047 memcpy(fd->fts + i, fd_searchlist_144m + i, 1048 sizeof(struct fd_type)); 1049#else 1050 for (i = 0; i < NUMDENS; i++) 1051 memcpy(fd->fts + i, fd_native_types + fd->type, 1052 sizeof(struct fd_type)); 1053#endif 1054 return (0); 1055} 1056 1057static int 1058fd_attach(device_t dev) 1059{ 1060 struct fd_data *fd; 1061 1062 fd = device_get_softc(dev); 1063 fd->masterdev = make_dev(&fd_cdevsw, fd->fdu, 1064 UID_ROOT, GID_OPERATOR, 0640, "fd%d", fd->fdu); 1065 fd->masterdev->si_drv1 = fd; 1066 fd->device_stats = devstat_new_entry(device_get_name(dev), 1067 device_get_unit(dev), 0, DEVSTAT_NO_ORDERED_TAGS, 1068 DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER, 1069 DEVSTAT_PRIORITY_FD); 1070 return (0); 1071} 1072 1073static int 1074fd_detach(device_t dev) 1075{ 1076 struct fd_data *fd; 1077 1078 fd = device_get_softc(dev); 1079 untimeout(fd_turnoff, fd, fd->toffhandle); 1080 devstat_remove_entry(fd->device_stats); 1081 destroy_dev(fd->masterdev); 1082 1083 return (0); 1084} 1085 1086static 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 1098static driver_t fd_driver = { 1099 "fd", 1100 fd_methods, 1101 sizeof(struct fd_data) 1102}; 1103 1104DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0); 1105 1106/* 1107 * More auxiliary functions. 1108 */ 1109/* 1110 * Motor control stuff. 1111 * Remember to not deselect the drive we're working on. 1112 */ 1113static void 1114set_motor(struct fdc_data *fdc, int fdsu, int turnon) 1115{ 1116#ifdef PC98 1117 bus_space_write_1(fdc->sc_fdsiot, fdc->sc_fdsioh, 0, 1118 (pc98_trans != 1 ? FDP_FDDEXC : 0) | FDP_PORTEXC); 1119 DELAY(10); 1120 fdctl_wr(fdc, FDC_DMAE | FDC_MTON); 1121#else 1122 int fdout; 1123 1124 fdout = fdc->fdout; 1125 if (turnon) { 1126 fdout &= ~FDO_FDSEL; 1127 fdout |= (FDO_MOEN0 << fdsu) | FDO_FDMAEN | FDO_FRST | fdsu; 1128 } else 1129 fdout &= ~(FDO_MOEN0 << fdsu); 1130 fdc->fdout = fdout; 1131 fdout_wr(fdc, fdout); 1132 TRACE1("[0x%x->FDOUT]", fdout); 1133#endif 1134} 1135 1136static void 1137fd_turnoff(void *xfd) 1138{ 1139 int s; 1140 fd_p fd = xfd; 1141 1142 TRACE1("[fd%d: turnoff]", fd->fdu); 1143 1144 s = splbio(); 1145 /* 1146 * Don't turn off the motor yet if the drive is active. 1147 * 1148 * If we got here, this could only mean we missed an interrupt. 1149 * This can e. g. happen on the Y-E Date PCMCIA floppy controller 1150 * after a controller reset. Just schedule a pseudo-interrupt 1151 * so the state machine gets re-entered. 1152 */ 1153 if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) { 1154 fdc_intr(fd->fdc); 1155 splx(s); 1156 return; 1157 } 1158 1159 fd->flags &= ~FD_MOTOR; 1160 set_motor(fd->fdc, fd->fdsu, TURNOFF); 1161 splx(s); 1162} 1163 1164static void 1165fd_motor_on(void *xfd) 1166{ 1167 int s; 1168 fd_p fd = xfd; 1169 1170 s = splbio(); 1171 fd->flags &= ~FD_MOTOR_WAIT; 1172 if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT)) 1173 { 1174 fdc_intr(fd->fdc); 1175 } 1176 splx(s); 1177} 1178 1179static void 1180fd_turnon(fd_p fd) 1181{ 1182 if(!(fd->flags & FD_MOTOR)) 1183 { 1184 fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT); 1185 set_motor(fd->fdc, fd->fdsu, TURNON); 1186 timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */ 1187 } 1188} 1189 1190static void 1191fdc_reset(fdc_p fdc) 1192{ 1193 /* Try a reset, keep motor on */ 1194#ifdef PC98 1195 set_density(fdc); 1196 if (pc98_machine_type & M_EPSON_PC98) 1197 fdctl_wr(fdc, FDC_RST | FDC_RDY | FDC_DD | FDC_MTON); 1198 else 1199 fdctl_wr(fdc, FDC_RST | FDC_RDY | FDC_DMAE | FDC_MTON); 1200 DELAY(200); 1201 fdctl_wr(fdc, FDC_DMAE | FDC_MTON); 1202 DELAY(10); 1203#else 1204 fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1205 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN)); 1206 DELAY(100); 1207 /* enable FDC, but defer interrupts a moment */ 1208 fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN); 1209 TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN); 1210 DELAY(100); 1211 fdout_wr(fdc, fdc->fdout); 1212 TRACE1("[0x%x->FDOUT]", fdc->fdout); 1213#endif 1214 1215 /* XXX after a reset, silently believe the FDC will accept commands */ 1216#ifdef PC98 1217 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1218 NE7_SPEC_1(4, 240), NE7_SPEC_2(2, 0), 1219 0); 1220#else 1221 (void)fd_cmd(fdc, 3, NE7CMD_SPECIFY, 1222 NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0), 1223 0); 1224#endif 1225 if (fdc->flags & FDC_HAS_FIFO) 1226 (void) enable_fifo(fdc); 1227} 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 */ 1239static int 1240fd_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 1269static int 1270out_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 * Block device driver interface functions (interspersed with even more 1295 * auxiliary functions). 1296 */ 1297static int 1298fdopen(struct cdev *dev, int flags, int mode, struct thread *td) 1299{ 1300 fd_p fd; 1301 fdc_p fdc; 1302#ifdef PC98 1303 fdu_t fdu; 1304#endif 1305 int rv, unitattn, dflags; 1306 1307 fd = dev->si_drv1; 1308 if (fd == NULL) 1309 return (ENXIO); 1310 fdc = fd->fdc; 1311 if ((fdc == NULL) || (fd->type == FDT_NONE)) 1312 return (ENXIO); 1313#ifdef PC98 1314 fdu = fd->fdu; 1315#endif 1316 dflags = device_get_flags(fd->dev); 1317 /* 1318 * This is a bit bogus. It's still possible that e. g. a 1319 * descriptor gets inherited to a child, but then it's at 1320 * least for the same subdevice. By checking FD_OPEN here, we 1321 * can ensure that a device isn't attempted to be opened with 1322 * different densities at the same time where the second open 1323 * could clobber the settings from the first one. 1324 */ 1325 if (fd->flags & FD_OPEN) 1326 return (EBUSY); 1327 1328#ifdef PC98 1329 if (pc98_fd_check_ready(fdu) == -1) 1330 return(EIO); 1331#endif 1332 1333 if (flags & FNONBLOCK) { 1334 /* 1335 * Unfortunately, physio(9) discards its ioflag 1336 * argument, thus preventing us from seeing the 1337 * O_NONBLOCK bit. So we need to keep track 1338 * ourselves. 1339 */ 1340 fd->flags |= FD_NONBLOCK; 1341 fd->ft = 0; 1342 } else { 1343 /* 1344 * Figure out a unit attention condition. 1345 * 1346 * If UA has been forced, proceed. 1347 * 1348 * If the drive has no changeline support, 1349 * or if the drive parameters have been lost 1350 * due to previous non-blocking access, 1351 * assume a forced UA condition. 1352 * 1353 * If motor is off, turn it on for a moment 1354 * and select our drive, in order to read the 1355 * UA hardware signal. 1356 * 1357 * If motor is on, and our drive is currently 1358 * selected, just read the hardware bit. 1359 * 1360 * If motor is on, but active for another 1361 * drive on that controller, we are lost. We 1362 * cannot risk to deselect the other drive, so 1363 * we just assume a forced UA condition to be 1364 * on the safe side. 1365 */ 1366 unitattn = 0; 1367 if ((dflags & FD_NO_CHLINE) != 0 || 1368 (fd->flags & FD_UA) != 0 || 1369 fd->ft == 0) { 1370 unitattn = 1; 1371 fd->flags &= ~FD_UA; 1372#ifndef PC98 1373 } else if (fdc->fdout & (FDO_MOEN0 | FDO_MOEN1 | 1374 FDO_MOEN2 | FDO_MOEN3)) { 1375 if ((fdc->fdout & FDO_FDSEL) == fd->fdsu) 1376 unitattn = fdin_rd(fdc) & FDI_DCHG; 1377 else 1378 unitattn = 1; 1379 } else { 1380 set_motor(fdc, fd->fdsu, TURNON); 1381 unitattn = fdin_rd(fdc) & FDI_DCHG; 1382 set_motor(fdc, fd->fdsu, TURNOFF); 1383#endif /* PC98 */ 1384 } 1385 if (unitattn && (rv = fdautoselect(dev)) != 0) 1386 return (rv); 1387 } 1388 fd->flags |= FD_OPEN; 1389 1390 if ((fdc->flags & FDC_NODMA) == 0) { 1391 if (fdc->dmacnt++ == 0) { 1392 isa_dma_acquire(fdc->dmachan); 1393 isa_dmainit(fdc->dmachan, MAX_SEC_SIZE); 1394 } 1395 } 1396 1397 /* 1398 * Clearing the DMA overrun counter at open time is a bit messy. 1399 * Since we're only managing one counter per controller, opening 1400 * the second drive could mess it up. Anyway, if the DMA overrun 1401 * condition is really persistent, it will eventually time out 1402 * still. OTOH, clearing it here will ensure we'll at least start 1403 * trying again after a previous (maybe even long ago) failure. 1404 * Also, this is merely a stop-gap measure only that should not 1405 * happen during normal operation, so we can tolerate it to be a 1406 * bit sloppy about this. 1407 */ 1408 fdc->dma_overruns = 0; 1409 1410 return 0; 1411} 1412 1413static int 1414fdclose(struct cdev *dev, int flags, int mode, struct thread *td) 1415{ 1416 struct fd_data *fd; 1417 fdc_p fdc; 1418 1419 fd = dev->si_drv1; 1420 fdc = fd->fdc; 1421 fd->flags &= ~(FD_OPEN | FD_NONBLOCK); 1422 fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR); 1423 1424 if ((fdc->flags & FDC_NODMA) == 0) 1425 if (--fdc->dmacnt == 0) 1426 isa_dma_release(fdc->dmachan); 1427 1428 return (0); 1429} 1430 1431static void 1432fdstrategy(struct bio *bp) 1433{ 1434 long blknum, nblocks; 1435 int s; 1436 fdu_t fdu; 1437 fdc_p fdc; 1438 fd_p fd; 1439 size_t fdblk; 1440 1441 fd = bp->bio_dev->si_drv1; 1442 fdu = fd->fdu; 1443 fdc = fd->fdc; 1444 bp->bio_resid = bp->bio_bcount; 1445 if (fd->type == FDT_NONE || fd->ft == 0) { 1446 if (fd->type != FDT_NONE && (fd->flags & FD_NONBLOCK)) 1447 bp->bio_error = EAGAIN; 1448 else 1449 bp->bio_error = ENXIO; 1450 bp->bio_flags |= BIO_ERROR; 1451 goto bad; 1452 } 1453 fdblk = 128 << (fd->ft->secsize); 1454 if (bp->bio_cmd != FDBIO_FORMAT && bp->bio_cmd != FDBIO_RDSECTID) { 1455 if (fd->flags & FD_NONBLOCK) { 1456 bp->bio_error = EAGAIN; 1457 bp->bio_flags |= BIO_ERROR; 1458 goto bad; 1459 } 1460 if (bp->bio_offset < 0) { 1461 printf( 1462 "fd%d: fdstrat: bad request offset = %ju, bcount = %ld\n", 1463 fdu, (intmax_t)bp->bio_offset, bp->bio_bcount); 1464 bp->bio_error = EINVAL; 1465 bp->bio_flags |= BIO_ERROR; 1466 goto bad; 1467 } 1468 if ((bp->bio_bcount % fdblk) != 0) { 1469 bp->bio_error = EINVAL; 1470 bp->bio_flags |= BIO_ERROR; 1471 goto bad; 1472 } 1473 } 1474 1475 /* 1476 * Set up block calculations. 1477 */ 1478#ifndef PC98 1479 if (bp->bio_offset >= ((off_t)128 << fd->ft->secsize) * fd->ft->size) { 1480 bp->bio_error = EINVAL; 1481 bp->bio_flags |= BIO_ERROR; 1482 goto bad; 1483 } 1484#endif 1485 blknum = bp->bio_offset / fdblk; 1486 nblocks = fd->ft->size; 1487 if (blknum + bp->bio_bcount / fdblk > nblocks) { 1488 if (blknum >= nblocks) { 1489 if (bp->bio_cmd != BIO_READ) { 1490 bp->bio_error = ENOSPC; 1491 bp->bio_flags |= BIO_ERROR; 1492 } 1493 goto bad; /* not always bad, but EOF */ 1494 } 1495 bp->bio_bcount = (nblocks - blknum) * fdblk; 1496 } 1497 bp->bio_pblkno = blknum; 1498 s = splbio(); 1499 bioq_disksort(&fdc->head, bp); 1500 untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */ 1501 devstat_start_transaction_bio(fd->device_stats, bp); 1502 device_busy(fd->dev); 1503 fdstart(fdc); 1504 splx(s); 1505 return; 1506 1507bad: 1508 biodone(bp); 1509} 1510 1511/* 1512 * fdstart 1513 * 1514 * We have just queued something. If the controller is not busy 1515 * then simulate the case where it has just finished a command 1516 * So that it (the interrupt routine) looks on the queue for more 1517 * work to do and picks up what we just added. 1518 * 1519 * If the controller is already busy, we need do nothing, as it 1520 * will pick up our work when the present work completes. 1521 */ 1522static void 1523fdstart(struct fdc_data *fdc) 1524{ 1525 int s; 1526 1527 s = splbio(); 1528 if(fdc->state == DEVIDLE) 1529 { 1530 fdc_intr(fdc); 1531 } 1532 splx(s); 1533} 1534 1535static void 1536fd_iotimeout(void *xfdc) 1537{ 1538 fdc_p fdc; 1539 int s; 1540 1541 fdc = xfdc; 1542 TRACE1("fd%d[fd_iotimeout()]", fdc->fdu); 1543 1544 /* 1545 * Due to IBM's brain-dead design, the FDC has a faked ready 1546 * signal, hardwired to ready == true. Thus, any command 1547 * issued if there's no diskette in the drive will _never_ 1548 * complete, and must be aborted by resetting the FDC. 1549 * Many thanks, Big Blue! 1550 * The FDC must not be reset directly, since that would 1551 * interfere with the state machine. Instead, pretend that 1552 * the command completed but was invalid. The state machine 1553 * will reset the FDC and retry once. 1554 */ 1555 s = splbio(); 1556 fdc->status[0] = NE7_ST0_IC_IV; 1557 fdc->flags &= ~FDC_STAT_VALID; 1558 fdc->state = IOTIMEDOUT; 1559 fdc_intr(fdc); 1560 splx(s); 1561} 1562 1563/* Just ensure it has the right spl. */ 1564static void 1565fd_pseudointr(void *xfdc) 1566{ 1567 int s; 1568 1569 s = splbio(); 1570 fdc_intr(xfdc); 1571 splx(s); 1572} 1573 1574/* 1575 * fdc_intr 1576 * 1577 * Keep calling the state machine until it returns a 0. 1578 * Always called at splbio. 1579 */ 1580static void 1581fdc_intr(void *xfdc) 1582{ 1583 fdc_p fdc = xfdc; 1584 while(fdstate(fdc)) 1585 ; 1586} 1587 1588/* 1589 * Magic pseudo-DMA initialization for YE FDC. Sets count and 1590 * direction. 1591 */ 1592#define SET_BCDR(fdc,wr,cnt,port) \ 1593 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \ 1594 ((cnt)-1) & 0xff); \ 1595 bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \ 1596 ((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f))); 1597 1598/* 1599 * fdcpio(): perform programmed IO read/write for YE PCMCIA floppy. 1600 */ 1601static int 1602fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count) 1603{ 1604 u_char *cptr = (u_char *)addr; 1605 1606 if (flags == BIO_READ) { 1607 if (fdc->state != PIOREAD) { 1608 fdc->state = PIOREAD; 1609 return(0); 1610 } 1611 SET_BCDR(fdc, 0, count, 0); 1612 bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1613 FDC_YE_DATAPORT, cptr, count); 1614 } else { 1615 bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off + 1616 FDC_YE_DATAPORT, cptr, count); 1617 SET_BCDR(fdc, 0, count, 0); 1618 } 1619 return(1); 1620} 1621 1622/* 1623 * Try figuring out the density of the media present in our device. 1624 */ 1625static int 1626fdautoselect(struct cdev *dev) 1627{ 1628 fd_p fd; 1629 struct fd_type *fdtp; 1630 struct fdc_readid id; 1631 int i, n, oopts, rv; 1632 1633 fd = dev->si_drv1; 1634 1635 switch (fd->type) { 1636 default: 1637 return (ENXIO); 1638 1639#ifndef PC98 1640 case FDT_360K: 1641 case FDT_720K: 1642 /* no autoselection on those drives */ 1643 fd->ft = fd_native_types + fd->type; 1644 return (0); 1645#endif 1646 1647 case FDT_12M: 1648 fdtp = fd_searchlist_12m; 1649 n = sizeof fd_searchlist_12m / sizeof(struct fd_type); 1650 break; 1651 1652 case FDT_144M: 1653 fdtp = fd_searchlist_144m; 1654 n = sizeof fd_searchlist_144m / sizeof(struct fd_type); 1655 break; 1656 1657#ifndef PC98 1658 case FDT_288M: 1659 fdtp = fd_searchlist_288m; 1660 n = sizeof fd_searchlist_288m / sizeof(struct fd_type); 1661 break; 1662#endif 1663 } 1664 1665 /* 1666 * Try reading sector ID fields, first at cylinder 0, head 0, 1667 * then at cylinder 2, head N. We don't probe cylinder 1, 1668 * since for 5.25in DD media in a HD drive, there are no data 1669 * to read (2 step pulses per media cylinder required). For 1670 * two-sided media, the second probe always goes to head 1, so 1671 * we can tell them apart from single-sided media. As a 1672 * side-effect this means that single-sided media should be 1673 * mentioned in the search list after two-sided media of an 1674 * otherwise identical density. Media with a different number 1675 * of sectors per track but otherwise identical parameters 1676 * cannot be distinguished at all. 1677 * 1678 * If we successfully read an ID field on both cylinders where 1679 * the recorded values match our expectation, we are done. 1680 * Otherwise, we try the next density entry from the table. 1681 * 1682 * Stepping to cylinder 2 has the side-effect of clearing the 1683 * unit attention bit. 1684 */ 1685 oopts = fd->options; 1686 fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY; 1687 for (i = 0; i < n; i++, fdtp++) { 1688 fd->ft = fdtp; 1689 1690 id.cyl = id.head = 0; 1691 rv = fdmisccmd(dev, FDBIO_RDSECTID, &id); 1692 if (rv != 0) 1693 continue; 1694 if (id.cyl != 0 || id.head != 0 || 1695 id.secshift != fdtp->secsize) 1696 continue; 1697 id.cyl = 2; 1698 id.head = fd->ft->heads - 1; 1699 rv = fdmisccmd(dev, FDBIO_RDSECTID, &id); 1700 if (id.cyl != 2 || id.head != fdtp->heads - 1 || 1701 id.secshift != fdtp->secsize) 1702 continue; 1703 if (rv == 0) 1704 break; 1705 } 1706 1707 fd->options = oopts; 1708 if (i == n) { 1709 if (bootverbose) 1710 device_printf(fd->dev, "autoselection failed\n"); 1711 fd->ft = 0; 1712 return (EIO); 1713 } else { 1714 if (bootverbose) 1715 device_printf(fd->dev, "autoselected %d KB medium\n", 1716#ifdef PC98 1717 (128 << (fd->ft->secsize)) * 1718 fd->ft->size / 1024); 1719#else 1720 fd->ft->size / 2); 1721#endif 1722 return (0); 1723 } 1724} 1725 1726 1727/* 1728 * The controller state machine. 1729 * 1730 * If it returns a non zero value, it should be called again immediately. 1731 */ 1732static int 1733fdstate(fdc_p fdc) 1734{ 1735 struct fdc_readid *idp; 1736 int read, format, rdsectid, cylinder, head, i, sec = 0, sectrac; 1737 int st0, cyl, st3, idf, ne7cmd, mfm, steptrac; 1738 unsigned long blknum; 1739 fdu_t fdu = fdc->fdu; 1740 fd_p fd; 1741 register struct bio *bp; 1742 struct fd_formb *finfo = NULL; 1743 size_t fdblk; 1744 1745 bp = fdc->bp; 1746 if (bp == NULL) { 1747 bp = bioq_takefirst(&fdc->head); 1748 if (bp != NULL) 1749 fdc->bp = bp; 1750 } 1751 if (bp == NULL) { 1752 /* 1753 * Nothing left for this controller to do, 1754 * force into the IDLE state. 1755 */ 1756 fdc->state = DEVIDLE; 1757 if (fdc->fd) { 1758 device_printf(fdc->fdc_dev, 1759 "unexpected valid fd pointer\n"); 1760 fdc->fd = (fd_p) 0; 1761 fdc->fdu = -1; 1762 } 1763 TRACE1("[fdc%d IDLE]", fdc->fdcu); 1764 return (0); 1765 } 1766 fd = bp->bio_dev->si_drv1; 1767 fdu = fd->fdu; 1768 fdblk = 128 << fd->ft->secsize; 1769 if (fdc->fd && (fd != fdc->fd)) 1770 device_printf(fd->dev, "confused fd pointers\n"); 1771 read = bp->bio_cmd == BIO_READ; 1772 mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0; 1773 steptrac = (fd->ft->flags & FL_2STEP)? 2: 1; 1774 if (read) 1775 idf = ISADMA_READ; 1776 else 1777 idf = ISADMA_WRITE; 1778 format = bp->bio_cmd == FDBIO_FORMAT; 1779 rdsectid = bp->bio_cmd == FDBIO_RDSECTID; 1780 if (format) 1781 finfo = (struct fd_formb *)bp->bio_data; 1782 TRACE1("fd%d", fdu); 1783 TRACE1("[%s]", fdstates[fdc->state]); 1784 TRACE1("(0x%x)", fd->flags); 1785 untimeout(fd_turnoff, fd, fd->toffhandle); 1786 fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz); 1787 switch (fdc->state) 1788 { 1789 case DEVIDLE: 1790 case FINDWORK: /* we have found new work */ 1791 fdc->retry = 0; 1792 fd->skip = 0; 1793 fdc->fd = fd; 1794 fdc->fdu = fdu; 1795#ifdef PC98 1796 pc98_trans = fd->ft->trans; 1797 if (pc98_trans_prev != pc98_trans) { 1798 int i; 1799 set_density(fdc); 1800 for (i = 0; i < 10; i++) { 1801 outb(0x5f, 0); 1802 outb(0x5f, 0); 1803 } 1804 pc98_trans_prev = pc98_trans; 1805 } 1806 if (pc98_trans != fd->pc98_trans) { 1807 if (fd->type == FDT_144M) { 1808 bus_space_write_1(fdc->sc_fdemsiot, 1809 fdc->sc_fdemsioh, 1810 0, 1811 (fdu << 5) | 0x10 | 1812 (pc98_trans >> 1)); 1813 outb(0x5f, 0); 1814 outb(0x5f, 0); 1815 } 1816 fd->pc98_trans = pc98_trans; 1817 } 1818#else 1819 fdc->fdctl_wr(fdc, fd->ft->trans); 1820#endif 1821 TRACE1("[0x%x->FDCTL]", fd->ft->trans); 1822 /* 1823 * If the next drive has a motor startup pending, then 1824 * it will start up in its own good time. 1825 */ 1826 if(fd->flags & FD_MOTOR_WAIT) { 1827 fdc->state = MOTORWAIT; 1828 return (0); /* will return later */ 1829 } 1830 /* 1831 * Maybe if it's not starting, it SHOULD be starting. 1832 */ 1833 if (!(fd->flags & FD_MOTOR)) 1834 { 1835 fdc->state = MOTORWAIT; 1836 fd_turnon(fd); 1837 return (0); /* will return later */ 1838 } 1839 else /* at least make sure we are selected */ 1840 { 1841 set_motor(fdc, fd->fdsu, TURNON); 1842 } 1843 if (fdc->flags & FDC_NEEDS_RESET) { 1844 fdc->state = RESETCTLR; 1845 fdc->flags &= ~FDC_NEEDS_RESET; 1846 } else 1847 fdc->state = DOSEEK; 1848 return (1); /* will return immediately */ 1849 1850 case DOSEEK: 1851 blknum = bp->bio_pblkno + fd->skip / fdblk; 1852 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 1853 if (cylinder == fd->track) 1854 { 1855 fdc->state = SEEKCOMPLETE; 1856 return (1); /* will return immediately */ 1857 } 1858#ifdef PC98 1859 pc98_fd_check_ready(fdu); 1860#endif 1861 if (fd_cmd(fdc, 3, NE7CMD_SEEK, 1862 fd->fdsu, cylinder * steptrac, 0)) 1863 { 1864 /* 1865 * Seek command not accepted, looks like 1866 * the FDC went off to the Saints... 1867 */ 1868 fdc->retry = 6; /* try a reset */ 1869 return(retrier(fdc)); 1870 } 1871 fd->track = FD_NO_TRACK; 1872 fdc->state = SEEKWAIT; 1873 return(0); /* will return later */ 1874 1875 case SEEKWAIT: 1876 /* allow heads to settle */ 1877 timeout(fd_pseudointr, fdc, hz / 16); 1878 fdc->state = SEEKCOMPLETE; 1879 return(0); /* will return later */ 1880 1881 case SEEKCOMPLETE : /* seek done, start DMA */ 1882 blknum = bp->bio_pblkno + fd->skip / fdblk; 1883 cylinder = blknum / (fd->ft->sectrac * fd->ft->heads); 1884 1885 /* Make sure seek really happened. */ 1886 if(fd->track == FD_NO_TRACK) { 1887 int descyl = cylinder * steptrac; 1888 do { 1889 /* 1890 * This might be a "ready changed" interrupt, 1891 * which cannot really happen since the 1892 * RDY pin is hardwired to + 5 volts. This 1893 * generally indicates a "bouncing" intr 1894 * line, so do one of the following: 1895 * 1896 * When running on an enhanced FDC that is 1897 * known to not go stuck after responding 1898 * with INVALID, fetch all interrupt states 1899 * until seeing either an INVALID or a 1900 * real interrupt condition. 1901 * 1902 * When running on a dumb old NE765, give 1903 * up immediately. The controller will 1904 * provide up to four dummy RC interrupt 1905 * conditions right after reset (for the 1906 * corresponding four drives), so this is 1907 * our only chance to get notice that it 1908 * was not the FDC that caused the interrupt. 1909 */ 1910 if (fd_sense_int(fdc, &st0, &cyl) 1911 == FD_NOT_VALID) 1912 return (0); /* will return later */ 1913 if(fdc->fdct == FDC_NE765 1914 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 1915 return (0); /* hope for a real intr */ 1916 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 1917 1918 if (0 == descyl) { 1919 int failed = 0; 1920 /* 1921 * seek to cyl 0 requested; make sure we are 1922 * really there 1923 */ 1924 if (fd_sense_drive_status(fdc, &st3)) 1925 failed = 1; 1926 if ((st3 & NE7_ST3_T0) == 0) { 1927 printf( 1928 "fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n", 1929 fdu, st3, NE7_ST3BITS); 1930 failed = 1; 1931 } 1932 1933 if (failed) { 1934 if(fdc->retry < 3) 1935 fdc->retry = 3; 1936 return (retrier(fdc)); 1937 } 1938 } 1939 1940 if (cyl != descyl) { 1941 printf( 1942 "fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", 1943 fdu, descyl, cyl, st0); 1944 if (fdc->retry < 3) 1945 fdc->retry = 3; 1946 return (retrier(fdc)); 1947 } 1948 } 1949 1950 fd->track = cylinder; 1951 if (format) 1952 fd->skip = (char *)&(finfo->fd_formb_cylno(0)) 1953 - (char *)finfo; 1954 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 1955 isa_dmastart(idf, bp->bio_data+fd->skip, 1956 format ? bp->bio_bcount : fdblk, fdc->dmachan); 1957 blknum = bp->bio_pblkno + fd->skip / fdblk; 1958 sectrac = fd->ft->sectrac; 1959 sec = blknum % (sectrac * fd->ft->heads); 1960 head = sec / sectrac; 1961 sec = sec % sectrac + 1; 1962 if (head != 0 && fd->ft->offset_side2 != 0) 1963 sec += fd->ft->offset_side2; 1964 fd->hddrv = ((head&1)<<2)+fdu; 1965 1966 if(format || !(read || rdsectid)) 1967 { 1968 /* make sure the drive is writable */ 1969 if(fd_sense_drive_status(fdc, &st3) != 0) 1970 { 1971 /* stuck controller? */ 1972 if (!(fdc->flags & FDC_NODMA)) 1973 isa_dmadone(idf, 1974 bp->bio_data + fd->skip, 1975 format ? bp->bio_bcount : fdblk, 1976 fdc->dmachan); 1977 fdc->retry = 6; /* reset the beast */ 1978 return (retrier(fdc)); 1979 } 1980 if(st3 & NE7_ST3_WP) 1981 { 1982 /* 1983 * XXX YES! this is ugly. 1984 * in order to force the current operation 1985 * to fail, we will have to fake an FDC 1986 * error - all error handling is done 1987 * by the retrier() 1988 */ 1989 fdc->status[0] = NE7_ST0_IC_AT; 1990 fdc->status[1] = NE7_ST1_NW; 1991 fdc->status[2] = 0; 1992 fdc->status[3] = fd->track; 1993 fdc->status[4] = head; 1994 fdc->status[5] = sec; 1995 fdc->retry = 8; /* break out immediately */ 1996 fdc->state = IOTIMEDOUT; /* not really... */ 1997 return (1); /* will return immediately */ 1998 } 1999 } 2000 2001 if (format) { 2002 ne7cmd = NE7CMD_FORMAT | mfm; 2003 if (fdc->flags & FDC_NODMA) { 2004 /* 2005 * This seems to be necessary for 2006 * whatever obscure reason; if we omit 2007 * it, we end up filling the sector ID 2008 * fields of the newly formatted track 2009 * entirely with garbage, causing 2010 * `wrong cylinder' errors all over 2011 * the place when trying to read them 2012 * back. 2013 * 2014 * Umpf. 2015 */ 2016 SET_BCDR(fdc, 1, bp->bio_bcount, 0); 2017 2018 (void)fdcpio(fdc,bp->bio_cmd, 2019 bp->bio_data+fd->skip, 2020 bp->bio_bcount); 2021 2022 } 2023 /* formatting */ 2024 if(fd_cmd(fdc, 6, ne7cmd, head << 2 | fdu, 2025 finfo->fd_formb_secshift, 2026 finfo->fd_formb_nsecs, 2027 finfo->fd_formb_gaplen, 2028 finfo->fd_formb_fillbyte, 0)) { 2029 /* controller fell over */ 2030 if (!(fdc->flags & FDC_NODMA)) 2031 isa_dmadone(idf, 2032 bp->bio_data + fd->skip, 2033 format ? bp->bio_bcount : fdblk, 2034 fdc->dmachan); 2035 fdc->retry = 6; 2036 return (retrier(fdc)); 2037 } 2038 } else if (rdsectid) { 2039 ne7cmd = NE7CMD_READID | mfm; 2040 if (fd_cmd(fdc, 2, ne7cmd, head << 2 | fdu, 0)) { 2041 /* controller jamming */ 2042 fdc->retry = 6; 2043 return (retrier(fdc)); 2044 } 2045 } else { 2046 /* read or write operation */ 2047 ne7cmd = (read ? NE7CMD_READ | NE7CMD_SK : NE7CMD_WRITE) | mfm; 2048 if (fdc->flags & FDC_NODMA) { 2049 /* 2050 * This seems to be necessary even when 2051 * reading data. 2052 */ 2053 SET_BCDR(fdc, 1, fdblk, 0); 2054 2055 /* 2056 * Perform the write pseudo-DMA before 2057 * the WRITE command is sent. 2058 */ 2059 if (!read) 2060 (void)fdcpio(fdc,bp->bio_cmd, 2061 bp->bio_data+fd->skip, 2062 fdblk); 2063 } 2064 if (fd_cmd(fdc, 9, 2065 ne7cmd, 2066 head << 2 | fdu, /* head & unit */ 2067 fd->track, /* track */ 2068 head, 2069 sec, /* sector + 1 */ 2070 fd->ft->secsize, /* sector size */ 2071 sectrac, /* sectors/track */ 2072 fd->ft->gap, /* gap size */ 2073 fd->ft->datalen, /* data length */ 2074 0)) { 2075 /* the beast is sleeping again */ 2076 if (!(fdc->flags & FDC_NODMA)) 2077 isa_dmadone(idf, 2078 bp->bio_data + fd->skip, 2079 format ? bp->bio_bcount : fdblk, 2080 fdc->dmachan); 2081 fdc->retry = 6; 2082 return (retrier(fdc)); 2083 } 2084 } 2085 if (!rdsectid && (fdc->flags & FDC_NODMA)) 2086 /* 2087 * If this is a read, then simply await interrupt 2088 * before performing PIO. 2089 */ 2090 if (read && !fdcpio(fdc,bp->bio_cmd, 2091 bp->bio_data+fd->skip,fdblk)) { 2092 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2093 return(0); /* will return later */ 2094 } 2095 2096 /* 2097 * Write (or format) operation will fall through and 2098 * await completion interrupt. 2099 */ 2100 fdc->state = IOCOMPLETE; 2101 fd->tohandle = timeout(fd_iotimeout, fdc, hz); 2102 return (0); /* will return later */ 2103 2104 case PIOREAD: 2105 /* 2106 * Actually perform the PIO read. The IOCOMPLETE case 2107 * removes the timeout for us. 2108 */ 2109 (void)fdcpio(fdc,bp->bio_cmd,bp->bio_data+fd->skip,fdblk); 2110 fdc->state = IOCOMPLETE; 2111 /* FALLTHROUGH */ 2112 case IOCOMPLETE: /* IO done, post-analyze */ 2113 untimeout(fd_iotimeout, fdc, fd->tohandle); 2114 2115 if (fd_read_status(fdc)) { 2116 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2117 isa_dmadone(idf, bp->bio_data + fd->skip, 2118 format ? bp->bio_bcount : fdblk, 2119 fdc->dmachan); 2120 if (fdc->retry < 6) 2121 fdc->retry = 6; /* force a reset */ 2122 return (retrier(fdc)); 2123 } 2124 2125 fdc->state = IOTIMEDOUT; 2126 2127 /* FALLTHROUGH */ 2128 case IOTIMEDOUT: 2129 if (!rdsectid && !(fdc->flags & FDC_NODMA)) 2130 isa_dmadone(idf, bp->bio_data + fd->skip, 2131 format ? bp->bio_bcount : fdblk, fdc->dmachan); 2132 if (fdc->status[0] & NE7_ST0_IC) { 2133 if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2134 && fdc->status[1] & NE7_ST1_OR) { 2135 /* 2136 * DMA overrun. Someone hogged the bus and 2137 * didn't release it in time for the next 2138 * FDC transfer. 2139 * 2140 * We normally restart this without bumping 2141 * the retry counter. However, in case 2142 * something is seriously messed up (like 2143 * broken hardware), we rather limit the 2144 * number of retries so the IO operation 2145 * doesn't block indefinately. 2146 */ 2147 if (fdc->dma_overruns++ < FDC_DMAOV_MAX) { 2148 fdc->state = SEEKCOMPLETE; 2149 return (1);/* will return immediately */ 2150 } /* else fall through */ 2151 } 2152 if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV 2153 && fdc->retry < 6) 2154 fdc->retry = 6; /* force a reset */ 2155 else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT 2156 && fdc->status[2] & NE7_ST2_WC 2157 && fdc->retry < 3) 2158 fdc->retry = 3; /* force recalibrate */ 2159 return (retrier(fdc)); 2160 } 2161 /* All OK */ 2162 if (rdsectid) { 2163 /* copy out ID field contents */ 2164 idp = (struct fdc_readid *)bp->bio_data; 2165 idp->cyl = fdc->status[3]; 2166 idp->head = fdc->status[4]; 2167 idp->sec = fdc->status[5]; 2168 idp->secshift = fdc->status[6]; 2169 } 2170 /* Operation successful, retry DMA overruns again next time. */ 2171 fdc->dma_overruns = 0; 2172 fd->skip += fdblk; 2173 if (!rdsectid && !format && fd->skip < bp->bio_bcount) { 2174 /* set up next transfer */ 2175 fdc->state = DOSEEK; 2176 } else { 2177 /* ALL DONE */ 2178 fd->skip = 0; 2179 bp->bio_resid = 0; 2180 fdc->bp = NULL; 2181 device_unbusy(fd->dev); 2182 biofinish(bp, fd->device_stats, 0); 2183 fdc->fd = (fd_p) 0; 2184 fdc->fdu = -1; 2185 fdc->state = FINDWORK; 2186 } 2187 return (1); /* will return immediately */ 2188 2189 case RESETCTLR: 2190 fdc_reset(fdc); 2191 fdc->retry++; 2192 fdc->state = RESETCOMPLETE; 2193 return (0); /* will return later */ 2194 2195 case RESETCOMPLETE: 2196 /* 2197 * Discard all the results from the reset so that they 2198 * can't cause an unexpected interrupt later. 2199 */ 2200 for (i = 0; i < 4; i++) 2201 (void)fd_sense_int(fdc, &st0, &cyl); 2202 fdc->state = STARTRECAL; 2203 /* FALLTHROUGH */ 2204 case STARTRECAL: 2205#ifdef PC98 2206 pc98_fd_check_ready(fdu); 2207#endif 2208 if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) { 2209 /* arrgl */ 2210 fdc->retry = 6; 2211 return (retrier(fdc)); 2212 } 2213 fdc->state = RECALWAIT; 2214 return (0); /* will return later */ 2215 2216 case RECALWAIT: 2217 /* allow heads to settle */ 2218 timeout(fd_pseudointr, fdc, hz / 8); 2219 fdc->state = RECALCOMPLETE; 2220 return (0); /* will return later */ 2221 2222 case RECALCOMPLETE: 2223 do { 2224 /* 2225 * See SEEKCOMPLETE for a comment on this: 2226 */ 2227 if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID) 2228 return (0); /* will return later */ 2229 if(fdc->fdct == FDC_NE765 2230 && (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC) 2231 return (0); /* hope for a real intr */ 2232 } while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC); 2233 if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0) 2234 { 2235 if(fdc->retry > 3) 2236 /* 2237 * A recalibrate from beyond cylinder 77 2238 * will "fail" due to the FDC limitations; 2239 * since people used to complain much about 2240 * the failure message, try not logging 2241 * this one if it seems to be the first 2242 * time in a line. 2243 */ 2244 printf("fd%d: recal failed ST0 %b cyl %d\n", 2245 fdu, st0, NE7_ST0BITS, cyl); 2246 if(fdc->retry < 3) fdc->retry = 3; 2247 return (retrier(fdc)); 2248 } 2249 fd->track = 0; 2250 /* Seek (probably) necessary */ 2251 fdc->state = DOSEEK; 2252 return (1); /* will return immediately */ 2253 2254 case MOTORWAIT: 2255 if(fd->flags & FD_MOTOR_WAIT) 2256 { 2257 return (0); /* time's not up yet */ 2258 } 2259 if (fdc->flags & FDC_NEEDS_RESET) { 2260 fdc->state = RESETCTLR; 2261 fdc->flags &= ~FDC_NEEDS_RESET; 2262 } else 2263 fdc->state = DOSEEK; 2264 return (1); /* will return immediately */ 2265 2266 default: 2267 device_printf(fdc->fdc_dev, "unexpected FD int->"); 2268 if (fd_read_status(fdc) == 0) 2269 printf("FDC status :%x %x %x %x %x %x %x ", 2270 fdc->status[0], 2271 fdc->status[1], 2272 fdc->status[2], 2273 fdc->status[3], 2274 fdc->status[4], 2275 fdc->status[5], 2276 fdc->status[6] ); 2277 else 2278 printf("No status available "); 2279 if (fd_sense_int(fdc, &st0, &cyl) != 0) 2280 { 2281 printf("[controller is dead now]\n"); 2282 return (0); /* will return later */ 2283 } 2284 printf("ST0 = %x, PCN = %x\n", st0, cyl); 2285 return (0); /* will return later */ 2286 } 2287 /* noone should ever get here */ 2288} 2289 2290static int 2291retrier(struct fdc_data *fdc) 2292{ 2293 struct bio *bp; 2294 struct fd_data *fd; 2295 int fdu; 2296 2297 bp = fdc->bp; 2298 2299 /* XXX shouldn't this be cached somewhere? */ 2300 fd = bp->bio_dev->si_drv1; 2301 fdu = fd->fdu; 2302 if (fd->options & FDOPT_NORETRY) 2303 goto fail; 2304 2305 switch (fdc->retry) { 2306 case 0: case 1: case 2: 2307 fdc->state = SEEKCOMPLETE; 2308 break; 2309 case 3: case 4: case 5: 2310 fdc->state = STARTRECAL; 2311 break; 2312 case 6: 2313 fdc->state = RESETCTLR; 2314 break; 2315 case 7: 2316 break; 2317 default: 2318 fail: 2319 if ((fd->options & FDOPT_NOERRLOG) == 0) { 2320 disk_err(bp, "hard error", 2321 fdc->fd->skip / DEV_BSIZE, 0); 2322 if (fdc->flags & FDC_STAT_VALID) { 2323 printf( 2324 " (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n", 2325 fdc->status[0], NE7_ST0BITS, 2326 fdc->status[1], NE7_ST1BITS, 2327 fdc->status[2], NE7_ST2BITS, 2328 fdc->status[3], fdc->status[4], 2329 fdc->status[5]); 2330 } 2331 else 2332 printf(" (No status)\n"); 2333 } 2334 if ((fd->options & FDOPT_NOERROR) == 0) { 2335 bp->bio_flags |= BIO_ERROR; 2336 bp->bio_error = EIO; 2337 bp->bio_resid = bp->bio_bcount - fdc->fd->skip; 2338 } else 2339 bp->bio_resid = 0; 2340 fdc->bp = NULL; 2341 fdc->fd->skip = 0; 2342 device_unbusy(fd->dev); 2343 biofinish(bp, fdc->fd->device_stats, 0); 2344 fdc->state = FINDWORK; 2345 fdc->flags |= FDC_NEEDS_RESET; 2346 fdc->fd = (fd_p) 0; 2347 fdc->fdu = -1; 2348 return (1); 2349 } 2350 fdc->retry++; 2351 return (1); 2352} 2353 2354static void 2355fdbiodone(struct bio *bp) 2356{ 2357 wakeup(bp); 2358} 2359 2360static int 2361fdmisccmd(struct cdev *dev, u_int cmd, void *data) 2362{ 2363 fdu_t fdu; 2364 fd_p fd; 2365 struct bio *bp; 2366 struct fd_formb *finfo; 2367 struct fdc_readid *idfield; 2368 size_t fdblk; 2369 int error; 2370 2371 fd = dev->si_drv1; 2372 fdu = fd->fdu; 2373 fdblk = 128 << fd->ft->secsize; 2374 finfo = (struct fd_formb *)data; 2375 idfield = (struct fdc_readid *)data; 2376 2377 bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO); 2378 2379 /* 2380 * Set up a bio request for fdstrategy(). bio_offset is faked 2381 * so that fdstrategy() will seek to the requested 2382 * cylinder, and use the desired head. 2383 */ 2384 bp->bio_cmd = cmd; 2385 if (cmd == FDBIO_FORMAT) { 2386 bp->bio_offset = 2387 (finfo->cyl * (fd->ft->sectrac * fd->ft->heads) + 2388 finfo->head * fd->ft->sectrac) * fdblk; 2389 bp->bio_bcount = sizeof(struct fd_idfield_data) * 2390 finfo->fd_formb_nsecs; 2391 } else if (cmd == FDBIO_RDSECTID) { 2392 bp->bio_offset = 2393 (idfield->cyl * (fd->ft->sectrac * fd->ft->heads) + 2394 idfield->head * fd->ft->sectrac) * fdblk; 2395 bp->bio_bcount = sizeof(struct fdc_readid); 2396 } else 2397 panic("wrong cmd in fdmisccmd()"); 2398 bp->bio_data = data; 2399 bp->bio_dev = dev; 2400 bp->bio_done = fdbiodone; 2401 bp->bio_flags = 0; 2402 2403 /* Now run the command. */ 2404 fdstrategy(bp); 2405 error = biowait(bp, "fdcmd"); 2406 2407 free(bp, M_TEMP); 2408 return (error); 2409} 2410 2411static int 2412fdioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 2413{ 2414 fdu_t fdu; 2415 fd_p fd; 2416 struct fdc_status *fsp; 2417 struct fdc_readid *rid; 2418 int error; 2419 2420 fd = dev->si_drv1; 2421 fdu = fd->fdu; 2422 2423#ifdef PC98 2424 pc98_fd_check_ready(fdu); 2425#endif 2426 2427 /* 2428 * First, handle everything that could be done with 2429 * FD_NONBLOCK still being set. 2430 */ 2431 switch (cmd) { 2432 2433 case DIOCGMEDIASIZE: 2434 if (fd->ft == 0) 2435 return ((fd->flags & FD_NONBLOCK) ? EAGAIN : ENXIO); 2436 *(off_t *)addr = (128 << (fd->ft->secsize)) * fd->ft->size; 2437 return (0); 2438 2439 case DIOCGSECTORSIZE: 2440 if (fd->ft == 0) 2441 return ((fd->flags & FD_NONBLOCK) ? EAGAIN : ENXIO); 2442 *(u_int *)addr = 128 << (fd->ft->secsize); 2443 return (0); 2444 2445 case FIONBIO: 2446 if (*(int *)addr != 0) 2447 fd->flags |= FD_NONBLOCK; 2448 else { 2449 if (fd->ft == 0) { 2450 /* 2451 * No drive type has been selected yet, 2452 * cannot turn FNONBLOCK off. 2453 */ 2454 return (EINVAL); 2455 } 2456 fd->flags &= ~FD_NONBLOCK; 2457 } 2458 return (0); 2459 2460 case FIOASYNC: 2461 /* keep the generic fcntl() code happy */ 2462 return (0); 2463 2464 case FD_GTYPE: /* get drive type */ 2465 if (fd->ft == 0) 2466 /* no type known yet, return the native type */ 2467 *(struct fd_type *)addr = fd_native_types[fd->type]; 2468 else 2469 *(struct fd_type *)addr = *fd->ft; 2470 return (0); 2471 2472 case FD_STYPE: /* set drive type */ 2473 /* 2474 * Allow setting drive type temporarily iff 2475 * currently unset. Used for fdformat so any 2476 * user can set it, and then start formatting. 2477 */ 2478 if (fd->ft) 2479 return (EINVAL); /* already set */ 2480 fd->fts[0] = *(struct fd_type *)addr; 2481 fd->ft = &fd->fts[0]; 2482 fd->flags |= FD_UA; 2483 return (0); 2484 2485 case FD_GOPTS: /* get drive options */ 2486 *(int *)addr = fd->options + FDOPT_AUTOSEL; 2487 return (0); 2488 2489 case FD_SOPTS: /* set drive options */ 2490 fd->options = *(int *)addr & ~FDOPT_AUTOSEL; 2491 return (0); 2492 2493#ifdef FDC_DEBUG 2494 case FD_DEBUG: 2495 if ((fd_debug != 0) != (*(int *)addr != 0)) { 2496 fd_debug = (*(int *)addr != 0); 2497 printf("fd%d: debugging turned %s\n", 2498 fd->fdu, fd_debug ? "on" : "off"); 2499 } 2500 return (0); 2501#endif 2502 2503 case FD_CLRERR: 2504 if (priv_check(td, PRIV_DRIVER) != 0) 2505 return (EPERM); 2506 fd->fdc->fdc_errs = 0; 2507 return (0); 2508 2509 case FD_GSTAT: 2510 fsp = (struct fdc_status *)addr; 2511 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2512 return (EINVAL); 2513 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2514 return (0); 2515 2516 case FD_GDTYPE: 2517 *(enum fd_drivetype *)addr = fd->type; 2518 return (0); 2519 } 2520 2521 /* 2522 * Now handle everything else. Make sure we have a valid 2523 * drive type. 2524 */ 2525 if (fd->flags & FD_NONBLOCK) 2526 return (EAGAIN); 2527 if (fd->ft == 0) 2528 return (ENXIO); 2529 error = 0; 2530 2531 switch (cmd) { 2532 2533 case FD_FORM: 2534 if ((flag & FWRITE) == 0) 2535 return (EBADF); /* must be opened for writing */ 2536 if (((struct fd_formb *)addr)->format_version != 2537 FD_FORMAT_VERSION) 2538 return (EINVAL); /* wrong version of formatting prog */ 2539 error = fdmisccmd(dev, FDBIO_FORMAT, addr); 2540 break; 2541 2542 case FD_GTYPE: /* get drive type */ 2543 *(struct fd_type *)addr = *fd->ft; 2544 break; 2545 2546 case FD_STYPE: /* set drive type */ 2547 /* this is considered harmful; only allow for superuser */ 2548 if (priv_check(td, PRIV_DRIVER) != 0) 2549 return (EPERM); 2550 *fd->ft = *(struct fd_type *)addr; 2551 break; 2552 2553 case FD_GOPTS: /* get drive options */ 2554 *(int *)addr = fd->options; 2555 break; 2556 2557 case FD_SOPTS: /* set drive options */ 2558 fd->options = *(int *)addr; 2559 break; 2560 2561#ifdef FDC_DEBUG 2562 case FD_DEBUG: 2563 if ((fd_debug != 0) != (*(int *)addr != 0)) { 2564 fd_debug = (*(int *)addr != 0); 2565 printf("fd%d: debugging turned %s\n", 2566 fd->fdu, fd_debug ? "on" : "off"); 2567 } 2568 break; 2569#endif 2570 2571 case FD_CLRERR: 2572 if (priv_check(td, PRIV_DRIVER) != 0) 2573 return (EPERM); 2574 fd->fdc->fdc_errs = 0; 2575 break; 2576 2577 case FD_GSTAT: 2578 fsp = (struct fdc_status *)addr; 2579 if ((fd->fdc->flags & FDC_STAT_VALID) == 0) 2580 return (EINVAL); 2581 memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int)); 2582 break; 2583 2584 case FD_READID: 2585 rid = (struct fdc_readid *)addr; 2586 if (rid->cyl > MAX_CYLINDER || rid->head > MAX_HEAD) 2587 return (EINVAL); 2588 error = fdmisccmd(dev, FDBIO_RDSECTID, addr); 2589 break; 2590 2591 default: 2592 error = ENOTTY; 2593 break; 2594 } 2595 return (error); 2596} 2597