1 /* 2 * QEMU Floppy disk emulator (Intel 82078) 3 * 4 * Copyright (c) 2003, 2007 Jocelyn Mayer 5 * Copyright (c) 2008 Hervé Poussineau 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 */ 25 /* 26 * The controller is used in Sun4m systems in a slightly different 27 * way. There are changes in DOR register and DMA is not available. 28 */ 29 30 #include "qemu/osdep.h" 31 #include "hw/hw.h" 32 #include "hw/block/fdc.h" 33 #include "qemu/error-report.h" 34 #include "qemu/timer.h" 35 #include "hw/isa/isa.h" 36 #include "hw/sysbus.h" 37 #include "sysemu/block-backend.h" 38 #include "sysemu/blockdev.h" 39 #include "sysemu/sysemu.h" 40 #include "qemu/log.h" 41 42 /********************************************************/ 43 /* debug Floppy devices */ 44 45 #define DEBUG_FLOPPY 0 46 47 #define FLOPPY_DPRINTF(fmt, ...) \ 48 do { \ 49 if (DEBUG_FLOPPY) { \ 50 fprintf(stderr, "FLOPPY: " fmt , ## __VA_ARGS__); \ 51 } \ 52 } while (0) 53 54 /********************************************************/ 55 /* Floppy drive emulation */ 56 57 typedef enum FDriveRate { 58 FDRIVE_RATE_500K = 0x00, /* 500 Kbps */ 59 FDRIVE_RATE_300K = 0x01, /* 300 Kbps */ 60 FDRIVE_RATE_250K = 0x02, /* 250 Kbps */ 61 FDRIVE_RATE_1M = 0x03, /* 1 Mbps */ 62 } FDriveRate; 63 64 typedef enum FDriveSize { 65 FDRIVE_SIZE_UNKNOWN, 66 FDRIVE_SIZE_350, 67 FDRIVE_SIZE_525, 68 } FDriveSize; 69 70 typedef struct FDFormat { 71 FloppyDriveType drive; 72 uint8_t last_sect; 73 uint8_t max_track; 74 uint8_t max_head; 75 FDriveRate rate; 76 } FDFormat; 77 78 /* In many cases, the total sector size of a format is enough to uniquely 79 * identify it. However, there are some total sector collisions between 80 * formats of different physical size, and these are noted below by 81 * highlighting the total sector size for entries with collisions. */ 82 static const FDFormat fd_formats[] = { 83 /* First entry is default format */ 84 /* 1.44 MB 3"1/2 floppy disks */ 85 { FLOPPY_DRIVE_TYPE_144, 18, 80, 1, FDRIVE_RATE_500K, }, /* 3.5" 2880 */ 86 { FLOPPY_DRIVE_TYPE_144, 20, 80, 1, FDRIVE_RATE_500K, }, /* 3.5" 3200 */ 87 { FLOPPY_DRIVE_TYPE_144, 21, 80, 1, FDRIVE_RATE_500K, }, 88 { FLOPPY_DRIVE_TYPE_144, 21, 82, 1, FDRIVE_RATE_500K, }, 89 { FLOPPY_DRIVE_TYPE_144, 21, 83, 1, FDRIVE_RATE_500K, }, 90 { FLOPPY_DRIVE_TYPE_144, 22, 80, 1, FDRIVE_RATE_500K, }, 91 { FLOPPY_DRIVE_TYPE_144, 23, 80, 1, FDRIVE_RATE_500K, }, 92 { FLOPPY_DRIVE_TYPE_144, 24, 80, 1, FDRIVE_RATE_500K, }, 93 /* 2.88 MB 3"1/2 floppy disks */ 94 { FLOPPY_DRIVE_TYPE_288, 36, 80, 1, FDRIVE_RATE_1M, }, 95 { FLOPPY_DRIVE_TYPE_288, 39, 80, 1, FDRIVE_RATE_1M, }, 96 { FLOPPY_DRIVE_TYPE_288, 40, 80, 1, FDRIVE_RATE_1M, }, 97 { FLOPPY_DRIVE_TYPE_288, 44, 80, 1, FDRIVE_RATE_1M, }, 98 { FLOPPY_DRIVE_TYPE_288, 48, 80, 1, FDRIVE_RATE_1M, }, 99 /* 720 kB 3"1/2 floppy disks */ 100 { FLOPPY_DRIVE_TYPE_144, 9, 80, 1, FDRIVE_RATE_250K, }, /* 3.5" 1440 */ 101 { FLOPPY_DRIVE_TYPE_144, 10, 80, 1, FDRIVE_RATE_250K, }, 102 { FLOPPY_DRIVE_TYPE_144, 10, 82, 1, FDRIVE_RATE_250K, }, 103 { FLOPPY_DRIVE_TYPE_144, 10, 83, 1, FDRIVE_RATE_250K, }, 104 { FLOPPY_DRIVE_TYPE_144, 13, 80, 1, FDRIVE_RATE_250K, }, 105 { FLOPPY_DRIVE_TYPE_144, 14, 80, 1, FDRIVE_RATE_250K, }, 106 /* 1.2 MB 5"1/4 floppy disks */ 107 { FLOPPY_DRIVE_TYPE_120, 15, 80, 1, FDRIVE_RATE_500K, }, 108 { FLOPPY_DRIVE_TYPE_120, 18, 80, 1, FDRIVE_RATE_500K, }, /* 5.25" 2880 */ 109 { FLOPPY_DRIVE_TYPE_120, 18, 82, 1, FDRIVE_RATE_500K, }, 110 { FLOPPY_DRIVE_TYPE_120, 18, 83, 1, FDRIVE_RATE_500K, }, 111 { FLOPPY_DRIVE_TYPE_120, 20, 80, 1, FDRIVE_RATE_500K, }, /* 5.25" 3200 */ 112 /* 720 kB 5"1/4 floppy disks */ 113 { FLOPPY_DRIVE_TYPE_120, 9, 80, 1, FDRIVE_RATE_250K, }, /* 5.25" 1440 */ 114 { FLOPPY_DRIVE_TYPE_120, 11, 80, 1, FDRIVE_RATE_250K, }, 115 /* 360 kB 5"1/4 floppy disks */ 116 { FLOPPY_DRIVE_TYPE_120, 9, 40, 1, FDRIVE_RATE_300K, }, /* 5.25" 720 */ 117 { FLOPPY_DRIVE_TYPE_120, 9, 40, 0, FDRIVE_RATE_300K, }, 118 { FLOPPY_DRIVE_TYPE_120, 10, 41, 1, FDRIVE_RATE_300K, }, 119 { FLOPPY_DRIVE_TYPE_120, 10, 42, 1, FDRIVE_RATE_300K, }, 120 /* 320 kB 5"1/4 floppy disks */ 121 { FLOPPY_DRIVE_TYPE_120, 8, 40, 1, FDRIVE_RATE_250K, }, 122 { FLOPPY_DRIVE_TYPE_120, 8, 40, 0, FDRIVE_RATE_250K, }, 123 /* 360 kB must match 5"1/4 better than 3"1/2... */ 124 { FLOPPY_DRIVE_TYPE_144, 9, 80, 0, FDRIVE_RATE_250K, }, /* 3.5" 720 */ 125 /* end */ 126 { FLOPPY_DRIVE_TYPE_NONE, -1, -1, 0, 0, }, 127 }; 128 129 static FDriveSize drive_size(FloppyDriveType drive) 130 { 131 switch (drive) { 132 case FLOPPY_DRIVE_TYPE_120: 133 return FDRIVE_SIZE_525; 134 case FLOPPY_DRIVE_TYPE_144: 135 case FLOPPY_DRIVE_TYPE_288: 136 return FDRIVE_SIZE_350; 137 default: 138 return FDRIVE_SIZE_UNKNOWN; 139 } 140 } 141 142 #define GET_CUR_DRV(fdctrl) ((fdctrl)->cur_drv) 143 #define SET_CUR_DRV(fdctrl, drive) ((fdctrl)->cur_drv = (drive)) 144 145 /* Will always be a fixed parameter for us */ 146 #define FD_SECTOR_LEN 512 147 #define FD_SECTOR_SC 2 /* Sector size code */ 148 #define FD_RESET_SENSEI_COUNT 4 /* Number of sense interrupts on RESET */ 149 150 typedef struct FDCtrl FDCtrl; 151 152 /* Floppy disk drive emulation */ 153 typedef enum FDiskFlags { 154 FDISK_DBL_SIDES = 0x01, 155 } FDiskFlags; 156 157 typedef struct FDrive { 158 FDCtrl *fdctrl; 159 BlockBackend *blk; 160 /* Drive status */ 161 FloppyDriveType drive; /* CMOS drive type */ 162 uint8_t perpendicular; /* 2.88 MB access mode */ 163 /* Position */ 164 uint8_t head; 165 uint8_t track; 166 uint8_t sect; 167 /* Media */ 168 FloppyDriveType disk; /* Current disk type */ 169 FDiskFlags flags; 170 uint8_t last_sect; /* Nb sector per track */ 171 uint8_t max_track; /* Nb of tracks */ 172 uint16_t bps; /* Bytes per sector */ 173 uint8_t ro; /* Is read-only */ 174 uint8_t media_changed; /* Is media changed */ 175 uint8_t media_rate; /* Data rate of medium */ 176 177 bool media_validated; /* Have we validated the media? */ 178 } FDrive; 179 180 181 static FloppyDriveType get_fallback_drive_type(FDrive *drv); 182 183 /* Hack: FD_SEEK is expected to work on empty drives. However, QEMU 184 * currently goes through some pains to keep seeks within the bounds 185 * established by last_sect and max_track. Correcting this is difficult, 186 * as refactoring FDC code tends to expose nasty bugs in the Linux kernel. 187 * 188 * For now: allow empty drives to have large bounds so we can seek around, 189 * with the understanding that when a diskette is inserted, the bounds will 190 * properly tighten to match the geometry of that inserted medium. 191 */ 192 static void fd_empty_seek_hack(FDrive *drv) 193 { 194 drv->last_sect = 0xFF; 195 drv->max_track = 0xFF; 196 } 197 198 static void fd_init(FDrive *drv) 199 { 200 /* Drive */ 201 drv->perpendicular = 0; 202 /* Disk */ 203 drv->disk = FLOPPY_DRIVE_TYPE_NONE; 204 drv->last_sect = 0; 205 drv->max_track = 0; 206 drv->ro = true; 207 drv->media_changed = 1; 208 } 209 210 #define NUM_SIDES(drv) ((drv)->flags & FDISK_DBL_SIDES ? 2 : 1) 211 212 static int fd_sector_calc(uint8_t head, uint8_t track, uint8_t sect, 213 uint8_t last_sect, uint8_t num_sides) 214 { 215 return (((track * num_sides) + head) * last_sect) + sect - 1; 216 } 217 218 /* Returns current position, in sectors, for given drive */ 219 static int fd_sector(FDrive *drv) 220 { 221 return fd_sector_calc(drv->head, drv->track, drv->sect, drv->last_sect, 222 NUM_SIDES(drv)); 223 } 224 225 /* Seek to a new position: 226 * returns 0 if already on right track 227 * returns 1 if track changed 228 * returns 2 if track is invalid 229 * returns 3 if sector is invalid 230 * returns 4 if seek is disabled 231 */ 232 static int fd_seek(FDrive *drv, uint8_t head, uint8_t track, uint8_t sect, 233 int enable_seek) 234 { 235 uint32_t sector; 236 int ret; 237 238 if (track > drv->max_track || 239 (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) { 240 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n", 241 head, track, sect, 1, 242 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1, 243 drv->max_track, drv->last_sect); 244 return 2; 245 } 246 if (sect > drv->last_sect) { 247 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n", 248 head, track, sect, 1, 249 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1, 250 drv->max_track, drv->last_sect); 251 return 3; 252 } 253 sector = fd_sector_calc(head, track, sect, drv->last_sect, NUM_SIDES(drv)); 254 ret = 0; 255 if (sector != fd_sector(drv)) { 256 #if 0 257 if (!enable_seek) { 258 FLOPPY_DPRINTF("error: no implicit seek %d %02x %02x" 259 " (max=%d %02x %02x)\n", 260 head, track, sect, 1, drv->max_track, 261 drv->last_sect); 262 return 4; 263 } 264 #endif 265 drv->head = head; 266 if (drv->track != track) { 267 if (drv->blk != NULL && blk_is_inserted(drv->blk)) { 268 drv->media_changed = 0; 269 } 270 ret = 1; 271 } 272 drv->track = track; 273 drv->sect = sect; 274 } 275 276 if (drv->blk == NULL || !blk_is_inserted(drv->blk)) { 277 ret = 2; 278 } 279 280 return ret; 281 } 282 283 /* Set drive back to track 0 */ 284 static void fd_recalibrate(FDrive *drv) 285 { 286 FLOPPY_DPRINTF("recalibrate\n"); 287 fd_seek(drv, 0, 0, 1, 1); 288 } 289 290 /** 291 * Determine geometry based on inserted diskette. 292 * Will not operate on an empty drive. 293 * 294 * @return: 0 on success, -1 if the drive is empty. 295 */ 296 static int pick_geometry(FDrive *drv) 297 { 298 BlockBackend *blk = drv->blk; 299 const FDFormat *parse; 300 uint64_t nb_sectors, size; 301 int i; 302 int match, size_match, type_match; 303 bool magic = drv->drive == FLOPPY_DRIVE_TYPE_AUTO; 304 305 /* We can only pick a geometry if we have a diskette. */ 306 if (!drv->blk || !blk_is_inserted(drv->blk) || 307 drv->drive == FLOPPY_DRIVE_TYPE_NONE) 308 { 309 return -1; 310 } 311 312 /* We need to determine the likely geometry of the inserted medium. 313 * In order of preference, we look for: 314 * (1) The same drive type and number of sectors, 315 * (2) The same diskette size and number of sectors, 316 * (3) The same drive type. 317 * 318 * In all cases, matches that occur higher in the drive table will take 319 * precedence over matches that occur later in the table. 320 */ 321 blk_get_geometry(blk, &nb_sectors); 322 match = size_match = type_match = -1; 323 for (i = 0; ; i++) { 324 parse = &fd_formats[i]; 325 if (parse->drive == FLOPPY_DRIVE_TYPE_NONE) { 326 break; 327 } 328 size = (parse->max_head + 1) * parse->max_track * parse->last_sect; 329 if (nb_sectors == size) { 330 if (magic || parse->drive == drv->drive) { 331 /* (1) perfect match -- nb_sectors and drive type */ 332 goto out; 333 } else if (drive_size(parse->drive) == drive_size(drv->drive)) { 334 /* (2) size match -- nb_sectors and physical medium size */ 335 match = (match == -1) ? i : match; 336 } else { 337 /* This is suspicious -- Did the user misconfigure? */ 338 size_match = (size_match == -1) ? i : size_match; 339 } 340 } else if (type_match == -1) { 341 if ((parse->drive == drv->drive) || 342 (magic && (parse->drive == get_fallback_drive_type(drv)))) { 343 /* (3) type match -- nb_sectors mismatch, but matches the type 344 * specified explicitly by the user, or matches the fallback 345 * default type when using the drive autodetect mechanism */ 346 type_match = i; 347 } 348 } 349 } 350 351 /* No exact match found */ 352 if (match == -1) { 353 if (size_match != -1) { 354 parse = &fd_formats[size_match]; 355 FLOPPY_DPRINTF("User requested floppy drive type '%s', " 356 "but inserted medium appears to be a " 357 "%"PRId64" sector '%s' type\n", 358 FloppyDriveType_lookup[drv->drive], 359 nb_sectors, 360 FloppyDriveType_lookup[parse->drive]); 361 } 362 match = type_match; 363 } 364 365 /* No match of any kind found -- fd_format is misconfigured, abort. */ 366 if (match == -1) { 367 error_setg(&error_abort, "No candidate geometries present in table " 368 " for floppy drive type '%s'", 369 FloppyDriveType_lookup[drv->drive]); 370 } 371 372 parse = &(fd_formats[match]); 373 374 out: 375 if (parse->max_head == 0) { 376 drv->flags &= ~FDISK_DBL_SIDES; 377 } else { 378 drv->flags |= FDISK_DBL_SIDES; 379 } 380 drv->max_track = parse->max_track; 381 drv->last_sect = parse->last_sect; 382 drv->disk = parse->drive; 383 drv->media_rate = parse->rate; 384 return 0; 385 } 386 387 static void pick_drive_type(FDrive *drv) 388 { 389 if (drv->drive != FLOPPY_DRIVE_TYPE_AUTO) { 390 return; 391 } 392 393 if (pick_geometry(drv) == 0) { 394 drv->drive = drv->disk; 395 } else { 396 drv->drive = get_fallback_drive_type(drv); 397 } 398 399 g_assert(drv->drive != FLOPPY_DRIVE_TYPE_AUTO); 400 } 401 402 /* Revalidate a disk drive after a disk change */ 403 static void fd_revalidate(FDrive *drv) 404 { 405 int rc; 406 407 FLOPPY_DPRINTF("revalidate\n"); 408 if (drv->blk != NULL) { 409 drv->ro = blk_is_read_only(drv->blk); 410 if (!blk_is_inserted(drv->blk)) { 411 FLOPPY_DPRINTF("No disk in drive\n"); 412 drv->disk = FLOPPY_DRIVE_TYPE_NONE; 413 fd_empty_seek_hack(drv); 414 } else if (!drv->media_validated) { 415 rc = pick_geometry(drv); 416 if (rc) { 417 FLOPPY_DPRINTF("Could not validate floppy drive media"); 418 } else { 419 drv->media_validated = true; 420 FLOPPY_DPRINTF("Floppy disk (%d h %d t %d s) %s\n", 421 (drv->flags & FDISK_DBL_SIDES) ? 2 : 1, 422 drv->max_track, drv->last_sect, 423 drv->ro ? "ro" : "rw"); 424 } 425 } 426 } else { 427 FLOPPY_DPRINTF("No drive connected\n"); 428 drv->last_sect = 0; 429 drv->max_track = 0; 430 drv->flags &= ~FDISK_DBL_SIDES; 431 drv->drive = FLOPPY_DRIVE_TYPE_NONE; 432 drv->disk = FLOPPY_DRIVE_TYPE_NONE; 433 } 434 } 435 436 /********************************************************/ 437 /* Intel 82078 floppy disk controller emulation */ 438 439 static void fdctrl_reset(FDCtrl *fdctrl, int do_irq); 440 static void fdctrl_to_command_phase(FDCtrl *fdctrl); 441 static int fdctrl_transfer_handler (void *opaque, int nchan, 442 int dma_pos, int dma_len); 443 static void fdctrl_raise_irq(FDCtrl *fdctrl); 444 static FDrive *get_cur_drv(FDCtrl *fdctrl); 445 446 static uint32_t fdctrl_read_statusA(FDCtrl *fdctrl); 447 static uint32_t fdctrl_read_statusB(FDCtrl *fdctrl); 448 static uint32_t fdctrl_read_dor(FDCtrl *fdctrl); 449 static void fdctrl_write_dor(FDCtrl *fdctrl, uint32_t value); 450 static uint32_t fdctrl_read_tape(FDCtrl *fdctrl); 451 static void fdctrl_write_tape(FDCtrl *fdctrl, uint32_t value); 452 static uint32_t fdctrl_read_main_status(FDCtrl *fdctrl); 453 static void fdctrl_write_rate(FDCtrl *fdctrl, uint32_t value); 454 static uint32_t fdctrl_read_data(FDCtrl *fdctrl); 455 static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value); 456 static uint32_t fdctrl_read_dir(FDCtrl *fdctrl); 457 static void fdctrl_write_ccr(FDCtrl *fdctrl, uint32_t value); 458 459 enum { 460 FD_DIR_WRITE = 0, 461 FD_DIR_READ = 1, 462 FD_DIR_SCANE = 2, 463 FD_DIR_SCANL = 3, 464 FD_DIR_SCANH = 4, 465 FD_DIR_VERIFY = 5, 466 }; 467 468 enum { 469 FD_STATE_MULTI = 0x01, /* multi track flag */ 470 FD_STATE_FORMAT = 0x02, /* format flag */ 471 }; 472 473 enum { 474 FD_REG_SRA = 0x00, 475 FD_REG_SRB = 0x01, 476 FD_REG_DOR = 0x02, 477 FD_REG_TDR = 0x03, 478 FD_REG_MSR = 0x04, 479 FD_REG_DSR = 0x04, 480 FD_REG_FIFO = 0x05, 481 FD_REG_DIR = 0x07, 482 FD_REG_CCR = 0x07, 483 }; 484 485 enum { 486 FD_CMD_READ_TRACK = 0x02, 487 FD_CMD_SPECIFY = 0x03, 488 FD_CMD_SENSE_DRIVE_STATUS = 0x04, 489 FD_CMD_WRITE = 0x05, 490 FD_CMD_READ = 0x06, 491 FD_CMD_RECALIBRATE = 0x07, 492 FD_CMD_SENSE_INTERRUPT_STATUS = 0x08, 493 FD_CMD_WRITE_DELETED = 0x09, 494 FD_CMD_READ_ID = 0x0a, 495 FD_CMD_READ_DELETED = 0x0c, 496 FD_CMD_FORMAT_TRACK = 0x0d, 497 FD_CMD_DUMPREG = 0x0e, 498 FD_CMD_SEEK = 0x0f, 499 FD_CMD_VERSION = 0x10, 500 FD_CMD_SCAN_EQUAL = 0x11, 501 FD_CMD_PERPENDICULAR_MODE = 0x12, 502 FD_CMD_CONFIGURE = 0x13, 503 FD_CMD_LOCK = 0x14, 504 FD_CMD_VERIFY = 0x16, 505 FD_CMD_POWERDOWN_MODE = 0x17, 506 FD_CMD_PART_ID = 0x18, 507 FD_CMD_SCAN_LOW_OR_EQUAL = 0x19, 508 FD_CMD_SCAN_HIGH_OR_EQUAL = 0x1d, 509 FD_CMD_SAVE = 0x2e, 510 FD_CMD_OPTION = 0x33, 511 FD_CMD_RESTORE = 0x4e, 512 FD_CMD_DRIVE_SPECIFICATION_COMMAND = 0x8e, 513 FD_CMD_RELATIVE_SEEK_OUT = 0x8f, 514 FD_CMD_FORMAT_AND_WRITE = 0xcd, 515 FD_CMD_RELATIVE_SEEK_IN = 0xcf, 516 }; 517 518 enum { 519 FD_CONFIG_PRETRK = 0xff, /* Pre-compensation set to track 0 */ 520 FD_CONFIG_FIFOTHR = 0x0f, /* FIFO threshold set to 1 byte */ 521 FD_CONFIG_POLL = 0x10, /* Poll enabled */ 522 FD_CONFIG_EFIFO = 0x20, /* FIFO disabled */ 523 FD_CONFIG_EIS = 0x40, /* No implied seeks */ 524 }; 525 526 enum { 527 FD_SR0_DS0 = 0x01, 528 FD_SR0_DS1 = 0x02, 529 FD_SR0_HEAD = 0x04, 530 FD_SR0_EQPMT = 0x10, 531 FD_SR0_SEEK = 0x20, 532 FD_SR0_ABNTERM = 0x40, 533 FD_SR0_INVCMD = 0x80, 534 FD_SR0_RDYCHG = 0xc0, 535 }; 536 537 enum { 538 FD_SR1_MA = 0x01, /* Missing address mark */ 539 FD_SR1_NW = 0x02, /* Not writable */ 540 FD_SR1_EC = 0x80, /* End of cylinder */ 541 }; 542 543 enum { 544 FD_SR2_SNS = 0x04, /* Scan not satisfied */ 545 FD_SR2_SEH = 0x08, /* Scan equal hit */ 546 }; 547 548 enum { 549 FD_SRA_DIR = 0x01, 550 FD_SRA_nWP = 0x02, 551 FD_SRA_nINDX = 0x04, 552 FD_SRA_HDSEL = 0x08, 553 FD_SRA_nTRK0 = 0x10, 554 FD_SRA_STEP = 0x20, 555 FD_SRA_nDRV2 = 0x40, 556 FD_SRA_INTPEND = 0x80, 557 }; 558 559 enum { 560 FD_SRB_MTR0 = 0x01, 561 FD_SRB_MTR1 = 0x02, 562 FD_SRB_WGATE = 0x04, 563 FD_SRB_RDATA = 0x08, 564 FD_SRB_WDATA = 0x10, 565 FD_SRB_DR0 = 0x20, 566 }; 567 568 enum { 569 #if MAX_FD == 4 570 FD_DOR_SELMASK = 0x03, 571 #else 572 FD_DOR_SELMASK = 0x01, 573 #endif 574 FD_DOR_nRESET = 0x04, 575 FD_DOR_DMAEN = 0x08, 576 FD_DOR_MOTEN0 = 0x10, 577 FD_DOR_MOTEN1 = 0x20, 578 FD_DOR_MOTEN2 = 0x40, 579 FD_DOR_MOTEN3 = 0x80, 580 }; 581 582 enum { 583 #if MAX_FD == 4 584 FD_TDR_BOOTSEL = 0x0c, 585 #else 586 FD_TDR_BOOTSEL = 0x04, 587 #endif 588 }; 589 590 enum { 591 FD_DSR_DRATEMASK= 0x03, 592 FD_DSR_PWRDOWN = 0x40, 593 FD_DSR_SWRESET = 0x80, 594 }; 595 596 enum { 597 FD_MSR_DRV0BUSY = 0x01, 598 FD_MSR_DRV1BUSY = 0x02, 599 FD_MSR_DRV2BUSY = 0x04, 600 FD_MSR_DRV3BUSY = 0x08, 601 FD_MSR_CMDBUSY = 0x10, 602 FD_MSR_NONDMA = 0x20, 603 FD_MSR_DIO = 0x40, 604 FD_MSR_RQM = 0x80, 605 }; 606 607 enum { 608 FD_DIR_DSKCHG = 0x80, 609 }; 610 611 /* 612 * See chapter 5.0 "Controller phases" of the spec: 613 * 614 * Command phase: 615 * The host writes a command and its parameters into the FIFO. The command 616 * phase is completed when all parameters for the command have been supplied, 617 * and execution phase is entered. 618 * 619 * Execution phase: 620 * Data transfers, either DMA or non-DMA. For non-DMA transfers, the FIFO 621 * contains the payload now, otherwise it's unused. When all bytes of the 622 * required data have been transferred, the state is switched to either result 623 * phase (if the command produces status bytes) or directly back into the 624 * command phase for the next command. 625 * 626 * Result phase: 627 * The host reads out the FIFO, which contains one or more result bytes now. 628 */ 629 enum { 630 /* Only for migration: reconstruct phase from registers like qemu 2.3 */ 631 FD_PHASE_RECONSTRUCT = 0, 632 633 FD_PHASE_COMMAND = 1, 634 FD_PHASE_EXECUTION = 2, 635 FD_PHASE_RESULT = 3, 636 }; 637 638 #define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI) 639 #define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT) 640 641 struct FDCtrl { 642 MemoryRegion iomem; 643 qemu_irq irq; 644 /* Controller state */ 645 QEMUTimer *result_timer; 646 int dma_chann; 647 uint8_t phase; 648 IsaDma *dma; 649 /* Controller's identification */ 650 uint8_t version; 651 /* HW */ 652 uint8_t sra; 653 uint8_t srb; 654 uint8_t dor; 655 uint8_t dor_vmstate; /* only used as temp during vmstate */ 656 uint8_t tdr; 657 uint8_t dsr; 658 uint8_t msr; 659 uint8_t cur_drv; 660 uint8_t status0; 661 uint8_t status1; 662 uint8_t status2; 663 /* Command FIFO */ 664 uint8_t *fifo; 665 int32_t fifo_size; 666 uint32_t data_pos; 667 uint32_t data_len; 668 uint8_t data_state; 669 uint8_t data_dir; 670 uint8_t eot; /* last wanted sector */ 671 /* States kept only to be returned back */ 672 /* precompensation */ 673 uint8_t precomp_trk; 674 uint8_t config; 675 uint8_t lock; 676 /* Power down config (also with status regB access mode */ 677 uint8_t pwrd; 678 /* Floppy drives */ 679 uint8_t num_floppies; 680 FDrive drives[MAX_FD]; 681 int reset_sensei; 682 uint32_t check_media_rate; 683 FloppyDriveType fallback; /* type=auto failure fallback */ 684 /* Timers state */ 685 uint8_t timer0; 686 uint8_t timer1; 687 }; 688 689 static FloppyDriveType get_fallback_drive_type(FDrive *drv) 690 { 691 return drv->fdctrl->fallback; 692 } 693 694 #define TYPE_SYSBUS_FDC "base-sysbus-fdc" 695 #define SYSBUS_FDC(obj) OBJECT_CHECK(FDCtrlSysBus, (obj), TYPE_SYSBUS_FDC) 696 697 typedef struct FDCtrlSysBus { 698 /*< private >*/ 699 SysBusDevice parent_obj; 700 /*< public >*/ 701 702 struct FDCtrl state; 703 } FDCtrlSysBus; 704 705 #define ISA_FDC(obj) OBJECT_CHECK(FDCtrlISABus, (obj), TYPE_ISA_FDC) 706 707 typedef struct FDCtrlISABus { 708 ISADevice parent_obj; 709 710 uint32_t iobase; 711 uint32_t irq; 712 uint32_t dma; 713 struct FDCtrl state; 714 int32_t bootindexA; 715 int32_t bootindexB; 716 } FDCtrlISABus; 717 718 static uint32_t fdctrl_read (void *opaque, uint32_t reg) 719 { 720 FDCtrl *fdctrl = opaque; 721 uint32_t retval; 722 723 reg &= 7; 724 switch (reg) { 725 case FD_REG_SRA: 726 retval = fdctrl_read_statusA(fdctrl); 727 break; 728 case FD_REG_SRB: 729 retval = fdctrl_read_statusB(fdctrl); 730 break; 731 case FD_REG_DOR: 732 retval = fdctrl_read_dor(fdctrl); 733 break; 734 case FD_REG_TDR: 735 retval = fdctrl_read_tape(fdctrl); 736 break; 737 case FD_REG_MSR: 738 retval = fdctrl_read_main_status(fdctrl); 739 break; 740 case FD_REG_FIFO: 741 retval = fdctrl_read_data(fdctrl); 742 break; 743 case FD_REG_DIR: 744 retval = fdctrl_read_dir(fdctrl); 745 break; 746 default: 747 retval = (uint32_t)(-1); 748 break; 749 } 750 FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval); 751 752 return retval; 753 } 754 755 static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value) 756 { 757 FDCtrl *fdctrl = opaque; 758 759 FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value); 760 761 reg &= 7; 762 switch (reg) { 763 case FD_REG_DOR: 764 fdctrl_write_dor(fdctrl, value); 765 break; 766 case FD_REG_TDR: 767 fdctrl_write_tape(fdctrl, value); 768 break; 769 case FD_REG_DSR: 770 fdctrl_write_rate(fdctrl, value); 771 break; 772 case FD_REG_FIFO: 773 fdctrl_write_data(fdctrl, value); 774 break; 775 case FD_REG_CCR: 776 fdctrl_write_ccr(fdctrl, value); 777 break; 778 default: 779 break; 780 } 781 } 782 783 static uint64_t fdctrl_read_mem (void *opaque, hwaddr reg, 784 unsigned ize) 785 { 786 return fdctrl_read(opaque, (uint32_t)reg); 787 } 788 789 static void fdctrl_write_mem (void *opaque, hwaddr reg, 790 uint64_t value, unsigned size) 791 { 792 fdctrl_write(opaque, (uint32_t)reg, value); 793 } 794 795 static const MemoryRegionOps fdctrl_mem_ops = { 796 .read = fdctrl_read_mem, 797 .write = fdctrl_write_mem, 798 .endianness = DEVICE_NATIVE_ENDIAN, 799 }; 800 801 static const MemoryRegionOps fdctrl_mem_strict_ops = { 802 .read = fdctrl_read_mem, 803 .write = fdctrl_write_mem, 804 .endianness = DEVICE_NATIVE_ENDIAN, 805 .valid = { 806 .min_access_size = 1, 807 .max_access_size = 1, 808 }, 809 }; 810 811 static bool fdrive_media_changed_needed(void *opaque) 812 { 813 FDrive *drive = opaque; 814 815 return (drive->blk != NULL && drive->media_changed != 1); 816 } 817 818 static const VMStateDescription vmstate_fdrive_media_changed = { 819 .name = "fdrive/media_changed", 820 .version_id = 1, 821 .minimum_version_id = 1, 822 .needed = fdrive_media_changed_needed, 823 .fields = (VMStateField[]) { 824 VMSTATE_UINT8(media_changed, FDrive), 825 VMSTATE_END_OF_LIST() 826 } 827 }; 828 829 static bool fdrive_media_rate_needed(void *opaque) 830 { 831 FDrive *drive = opaque; 832 833 return drive->fdctrl->check_media_rate; 834 } 835 836 static const VMStateDescription vmstate_fdrive_media_rate = { 837 .name = "fdrive/media_rate", 838 .version_id = 1, 839 .minimum_version_id = 1, 840 .needed = fdrive_media_rate_needed, 841 .fields = (VMStateField[]) { 842 VMSTATE_UINT8(media_rate, FDrive), 843 VMSTATE_END_OF_LIST() 844 } 845 }; 846 847 static bool fdrive_perpendicular_needed(void *opaque) 848 { 849 FDrive *drive = opaque; 850 851 return drive->perpendicular != 0; 852 } 853 854 static const VMStateDescription vmstate_fdrive_perpendicular = { 855 .name = "fdrive/perpendicular", 856 .version_id = 1, 857 .minimum_version_id = 1, 858 .needed = fdrive_perpendicular_needed, 859 .fields = (VMStateField[]) { 860 VMSTATE_UINT8(perpendicular, FDrive), 861 VMSTATE_END_OF_LIST() 862 } 863 }; 864 865 static int fdrive_post_load(void *opaque, int version_id) 866 { 867 fd_revalidate(opaque); 868 return 0; 869 } 870 871 static const VMStateDescription vmstate_fdrive = { 872 .name = "fdrive", 873 .version_id = 1, 874 .minimum_version_id = 1, 875 .post_load = fdrive_post_load, 876 .fields = (VMStateField[]) { 877 VMSTATE_UINT8(head, FDrive), 878 VMSTATE_UINT8(track, FDrive), 879 VMSTATE_UINT8(sect, FDrive), 880 VMSTATE_END_OF_LIST() 881 }, 882 .subsections = (const VMStateDescription*[]) { 883 &vmstate_fdrive_media_changed, 884 &vmstate_fdrive_media_rate, 885 &vmstate_fdrive_perpendicular, 886 NULL 887 } 888 }; 889 890 /* 891 * Reconstructs the phase from register values according to the logic that was 892 * implemented in qemu 2.3. This is the default value that is used if the phase 893 * subsection is not present on migration. 894 * 895 * Don't change this function to reflect newer qemu versions, it is part of 896 * the migration ABI. 897 */ 898 static int reconstruct_phase(FDCtrl *fdctrl) 899 { 900 if (fdctrl->msr & FD_MSR_NONDMA) { 901 return FD_PHASE_EXECUTION; 902 } else if ((fdctrl->msr & FD_MSR_RQM) == 0) { 903 /* qemu 2.3 disabled RQM only during DMA transfers */ 904 return FD_PHASE_EXECUTION; 905 } else if (fdctrl->msr & FD_MSR_DIO) { 906 return FD_PHASE_RESULT; 907 } else { 908 return FD_PHASE_COMMAND; 909 } 910 } 911 912 static void fdc_pre_save(void *opaque) 913 { 914 FDCtrl *s = opaque; 915 916 s->dor_vmstate = s->dor | GET_CUR_DRV(s); 917 } 918 919 static int fdc_pre_load(void *opaque) 920 { 921 FDCtrl *s = opaque; 922 s->phase = FD_PHASE_RECONSTRUCT; 923 return 0; 924 } 925 926 static int fdc_post_load(void *opaque, int version_id) 927 { 928 FDCtrl *s = opaque; 929 930 SET_CUR_DRV(s, s->dor_vmstate & FD_DOR_SELMASK); 931 s->dor = s->dor_vmstate & ~FD_DOR_SELMASK; 932 933 if (s->phase == FD_PHASE_RECONSTRUCT) { 934 s->phase = reconstruct_phase(s); 935 } 936 937 return 0; 938 } 939 940 static bool fdc_reset_sensei_needed(void *opaque) 941 { 942 FDCtrl *s = opaque; 943 944 return s->reset_sensei != 0; 945 } 946 947 static const VMStateDescription vmstate_fdc_reset_sensei = { 948 .name = "fdc/reset_sensei", 949 .version_id = 1, 950 .minimum_version_id = 1, 951 .needed = fdc_reset_sensei_needed, 952 .fields = (VMStateField[]) { 953 VMSTATE_INT32(reset_sensei, FDCtrl), 954 VMSTATE_END_OF_LIST() 955 } 956 }; 957 958 static bool fdc_result_timer_needed(void *opaque) 959 { 960 FDCtrl *s = opaque; 961 962 return timer_pending(s->result_timer); 963 } 964 965 static const VMStateDescription vmstate_fdc_result_timer = { 966 .name = "fdc/result_timer", 967 .version_id = 1, 968 .minimum_version_id = 1, 969 .needed = fdc_result_timer_needed, 970 .fields = (VMStateField[]) { 971 VMSTATE_TIMER_PTR(result_timer, FDCtrl), 972 VMSTATE_END_OF_LIST() 973 } 974 }; 975 976 static bool fdc_phase_needed(void *opaque) 977 { 978 FDCtrl *fdctrl = opaque; 979 980 return reconstruct_phase(fdctrl) != fdctrl->phase; 981 } 982 983 static const VMStateDescription vmstate_fdc_phase = { 984 .name = "fdc/phase", 985 .version_id = 1, 986 .minimum_version_id = 1, 987 .needed = fdc_phase_needed, 988 .fields = (VMStateField[]) { 989 VMSTATE_UINT8(phase, FDCtrl), 990 VMSTATE_END_OF_LIST() 991 } 992 }; 993 994 static const VMStateDescription vmstate_fdc = { 995 .name = "fdc", 996 .version_id = 2, 997 .minimum_version_id = 2, 998 .pre_save = fdc_pre_save, 999 .pre_load = fdc_pre_load, 1000 .post_load = fdc_post_load, 1001 .fields = (VMStateField[]) { 1002 /* Controller State */ 1003 VMSTATE_UINT8(sra, FDCtrl), 1004 VMSTATE_UINT8(srb, FDCtrl), 1005 VMSTATE_UINT8(dor_vmstate, FDCtrl), 1006 VMSTATE_UINT8(tdr, FDCtrl), 1007 VMSTATE_UINT8(dsr, FDCtrl), 1008 VMSTATE_UINT8(msr, FDCtrl), 1009 VMSTATE_UINT8(status0, FDCtrl), 1010 VMSTATE_UINT8(status1, FDCtrl), 1011 VMSTATE_UINT8(status2, FDCtrl), 1012 /* Command FIFO */ 1013 VMSTATE_VARRAY_INT32(fifo, FDCtrl, fifo_size, 0, vmstate_info_uint8, 1014 uint8_t), 1015 VMSTATE_UINT32(data_pos, FDCtrl), 1016 VMSTATE_UINT32(data_len, FDCtrl), 1017 VMSTATE_UINT8(data_state, FDCtrl), 1018 VMSTATE_UINT8(data_dir, FDCtrl), 1019 VMSTATE_UINT8(eot, FDCtrl), 1020 /* States kept only to be returned back */ 1021 VMSTATE_UINT8(timer0, FDCtrl), 1022 VMSTATE_UINT8(timer1, FDCtrl), 1023 VMSTATE_UINT8(precomp_trk, FDCtrl), 1024 VMSTATE_UINT8(config, FDCtrl), 1025 VMSTATE_UINT8(lock, FDCtrl), 1026 VMSTATE_UINT8(pwrd, FDCtrl), 1027 VMSTATE_UINT8_EQUAL(num_floppies, FDCtrl), 1028 VMSTATE_STRUCT_ARRAY(drives, FDCtrl, MAX_FD, 1, 1029 vmstate_fdrive, FDrive), 1030 VMSTATE_END_OF_LIST() 1031 }, 1032 .subsections = (const VMStateDescription*[]) { 1033 &vmstate_fdc_reset_sensei, 1034 &vmstate_fdc_result_timer, 1035 &vmstate_fdc_phase, 1036 NULL 1037 } 1038 }; 1039 1040 static void fdctrl_external_reset_sysbus(DeviceState *d) 1041 { 1042 FDCtrlSysBus *sys = SYSBUS_FDC(d); 1043 FDCtrl *s = &sys->state; 1044 1045 fdctrl_reset(s, 0); 1046 } 1047 1048 static void fdctrl_external_reset_isa(DeviceState *d) 1049 { 1050 FDCtrlISABus *isa = ISA_FDC(d); 1051 FDCtrl *s = &isa->state; 1052 1053 fdctrl_reset(s, 0); 1054 } 1055 1056 static void fdctrl_handle_tc(void *opaque, int irq, int level) 1057 { 1058 //FDCtrl *s = opaque; 1059 1060 if (level) { 1061 // XXX 1062 FLOPPY_DPRINTF("TC pulsed\n"); 1063 } 1064 } 1065 1066 /* Change IRQ state */ 1067 static void fdctrl_reset_irq(FDCtrl *fdctrl) 1068 { 1069 fdctrl->status0 = 0; 1070 if (!(fdctrl->sra & FD_SRA_INTPEND)) 1071 return; 1072 FLOPPY_DPRINTF("Reset interrupt\n"); 1073 qemu_set_irq(fdctrl->irq, 0); 1074 fdctrl->sra &= ~FD_SRA_INTPEND; 1075 } 1076 1077 static void fdctrl_raise_irq(FDCtrl *fdctrl) 1078 { 1079 if (!(fdctrl->sra & FD_SRA_INTPEND)) { 1080 qemu_set_irq(fdctrl->irq, 1); 1081 fdctrl->sra |= FD_SRA_INTPEND; 1082 } 1083 1084 fdctrl->reset_sensei = 0; 1085 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", fdctrl->status0); 1086 } 1087 1088 /* Reset controller */ 1089 static void fdctrl_reset(FDCtrl *fdctrl, int do_irq) 1090 { 1091 int i; 1092 1093 FLOPPY_DPRINTF("reset controller\n"); 1094 fdctrl_reset_irq(fdctrl); 1095 /* Initialise controller */ 1096 fdctrl->sra = 0; 1097 fdctrl->srb = 0xc0; 1098 if (!fdctrl->drives[1].blk) { 1099 fdctrl->sra |= FD_SRA_nDRV2; 1100 } 1101 fdctrl->cur_drv = 0; 1102 fdctrl->dor = FD_DOR_nRESET; 1103 fdctrl->dor |= (fdctrl->dma_chann != -1) ? FD_DOR_DMAEN : 0; 1104 fdctrl->msr = FD_MSR_RQM; 1105 fdctrl->reset_sensei = 0; 1106 timer_del(fdctrl->result_timer); 1107 /* FIFO state */ 1108 fdctrl->data_pos = 0; 1109 fdctrl->data_len = 0; 1110 fdctrl->data_state = 0; 1111 fdctrl->data_dir = FD_DIR_WRITE; 1112 for (i = 0; i < MAX_FD; i++) 1113 fd_recalibrate(&fdctrl->drives[i]); 1114 fdctrl_to_command_phase(fdctrl); 1115 if (do_irq) { 1116 fdctrl->status0 |= FD_SR0_RDYCHG; 1117 fdctrl_raise_irq(fdctrl); 1118 fdctrl->reset_sensei = FD_RESET_SENSEI_COUNT; 1119 } 1120 } 1121 1122 static inline FDrive *drv0(FDCtrl *fdctrl) 1123 { 1124 return &fdctrl->drives[(fdctrl->tdr & FD_TDR_BOOTSEL) >> 2]; 1125 } 1126 1127 static inline FDrive *drv1(FDCtrl *fdctrl) 1128 { 1129 if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (1 << 2)) 1130 return &fdctrl->drives[1]; 1131 else 1132 return &fdctrl->drives[0]; 1133 } 1134 1135 #if MAX_FD == 4 1136 static inline FDrive *drv2(FDCtrl *fdctrl) 1137 { 1138 if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (2 << 2)) 1139 return &fdctrl->drives[2]; 1140 else 1141 return &fdctrl->drives[1]; 1142 } 1143 1144 static inline FDrive *drv3(FDCtrl *fdctrl) 1145 { 1146 if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (3 << 2)) 1147 return &fdctrl->drives[3]; 1148 else 1149 return &fdctrl->drives[2]; 1150 } 1151 #endif 1152 1153 static FDrive *get_cur_drv(FDCtrl *fdctrl) 1154 { 1155 switch (fdctrl->cur_drv) { 1156 case 0: return drv0(fdctrl); 1157 case 1: return drv1(fdctrl); 1158 #if MAX_FD == 4 1159 case 2: return drv2(fdctrl); 1160 case 3: return drv3(fdctrl); 1161 #endif 1162 default: return NULL; 1163 } 1164 } 1165 1166 /* Status A register : 0x00 (read-only) */ 1167 static uint32_t fdctrl_read_statusA(FDCtrl *fdctrl) 1168 { 1169 uint32_t retval = fdctrl->sra; 1170 1171 FLOPPY_DPRINTF("status register A: 0x%02x\n", retval); 1172 1173 return retval; 1174 } 1175 1176 /* Status B register : 0x01 (read-only) */ 1177 static uint32_t fdctrl_read_statusB(FDCtrl *fdctrl) 1178 { 1179 uint32_t retval = fdctrl->srb; 1180 1181 FLOPPY_DPRINTF("status register B: 0x%02x\n", retval); 1182 1183 return retval; 1184 } 1185 1186 /* Digital output register : 0x02 */ 1187 static uint32_t fdctrl_read_dor(FDCtrl *fdctrl) 1188 { 1189 uint32_t retval = fdctrl->dor; 1190 1191 /* Selected drive */ 1192 retval |= fdctrl->cur_drv; 1193 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval); 1194 1195 return retval; 1196 } 1197 1198 static void fdctrl_write_dor(FDCtrl *fdctrl, uint32_t value) 1199 { 1200 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value); 1201 1202 /* Motors */ 1203 if (value & FD_DOR_MOTEN0) 1204 fdctrl->srb |= FD_SRB_MTR0; 1205 else 1206 fdctrl->srb &= ~FD_SRB_MTR0; 1207 if (value & FD_DOR_MOTEN1) 1208 fdctrl->srb |= FD_SRB_MTR1; 1209 else 1210 fdctrl->srb &= ~FD_SRB_MTR1; 1211 1212 /* Drive */ 1213 if (value & 1) 1214 fdctrl->srb |= FD_SRB_DR0; 1215 else 1216 fdctrl->srb &= ~FD_SRB_DR0; 1217 1218 /* Reset */ 1219 if (!(value & FD_DOR_nRESET)) { 1220 if (fdctrl->dor & FD_DOR_nRESET) { 1221 FLOPPY_DPRINTF("controller enter RESET state\n"); 1222 } 1223 } else { 1224 if (!(fdctrl->dor & FD_DOR_nRESET)) { 1225 FLOPPY_DPRINTF("controller out of RESET state\n"); 1226 fdctrl_reset(fdctrl, 1); 1227 fdctrl->dsr &= ~FD_DSR_PWRDOWN; 1228 } 1229 } 1230 /* Selected drive */ 1231 fdctrl->cur_drv = value & FD_DOR_SELMASK; 1232 1233 fdctrl->dor = value; 1234 } 1235 1236 /* Tape drive register : 0x03 */ 1237 static uint32_t fdctrl_read_tape(FDCtrl *fdctrl) 1238 { 1239 uint32_t retval = fdctrl->tdr; 1240 1241 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval); 1242 1243 return retval; 1244 } 1245 1246 static void fdctrl_write_tape(FDCtrl *fdctrl, uint32_t value) 1247 { 1248 /* Reset mode */ 1249 if (!(fdctrl->dor & FD_DOR_nRESET)) { 1250 FLOPPY_DPRINTF("Floppy controller in RESET state !\n"); 1251 return; 1252 } 1253 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value); 1254 /* Disk boot selection indicator */ 1255 fdctrl->tdr = value & FD_TDR_BOOTSEL; 1256 /* Tape indicators: never allow */ 1257 } 1258 1259 /* Main status register : 0x04 (read) */ 1260 static uint32_t fdctrl_read_main_status(FDCtrl *fdctrl) 1261 { 1262 uint32_t retval = fdctrl->msr; 1263 1264 fdctrl->dsr &= ~FD_DSR_PWRDOWN; 1265 fdctrl->dor |= FD_DOR_nRESET; 1266 1267 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval); 1268 1269 return retval; 1270 } 1271 1272 /* Data select rate register : 0x04 (write) */ 1273 static void fdctrl_write_rate(FDCtrl *fdctrl, uint32_t value) 1274 { 1275 /* Reset mode */ 1276 if (!(fdctrl->dor & FD_DOR_nRESET)) { 1277 FLOPPY_DPRINTF("Floppy controller in RESET state !\n"); 1278 return; 1279 } 1280 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value); 1281 /* Reset: autoclear */ 1282 if (value & FD_DSR_SWRESET) { 1283 fdctrl->dor &= ~FD_DOR_nRESET; 1284 fdctrl_reset(fdctrl, 1); 1285 fdctrl->dor |= FD_DOR_nRESET; 1286 } 1287 if (value & FD_DSR_PWRDOWN) { 1288 fdctrl_reset(fdctrl, 1); 1289 } 1290 fdctrl->dsr = value; 1291 } 1292 1293 /* Configuration control register: 0x07 (write) */ 1294 static void fdctrl_write_ccr(FDCtrl *fdctrl, uint32_t value) 1295 { 1296 /* Reset mode */ 1297 if (!(fdctrl->dor & FD_DOR_nRESET)) { 1298 FLOPPY_DPRINTF("Floppy controller in RESET state !\n"); 1299 return; 1300 } 1301 FLOPPY_DPRINTF("configuration control register set to 0x%02x\n", value); 1302 1303 /* Only the rate selection bits used in AT mode, and we 1304 * store those in the DSR. 1305 */ 1306 fdctrl->dsr = (fdctrl->dsr & ~FD_DSR_DRATEMASK) | 1307 (value & FD_DSR_DRATEMASK); 1308 } 1309 1310 static int fdctrl_media_changed(FDrive *drv) 1311 { 1312 return drv->media_changed; 1313 } 1314 1315 /* Digital input register : 0x07 (read-only) */ 1316 static uint32_t fdctrl_read_dir(FDCtrl *fdctrl) 1317 { 1318 uint32_t retval = 0; 1319 1320 if (fdctrl_media_changed(get_cur_drv(fdctrl))) { 1321 retval |= FD_DIR_DSKCHG; 1322 } 1323 if (retval != 0) { 1324 FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval); 1325 } 1326 1327 return retval; 1328 } 1329 1330 /* Clear the FIFO and update the state for receiving the next command */ 1331 static void fdctrl_to_command_phase(FDCtrl *fdctrl) 1332 { 1333 fdctrl->phase = FD_PHASE_COMMAND; 1334 fdctrl->data_dir = FD_DIR_WRITE; 1335 fdctrl->data_pos = 0; 1336 fdctrl->data_len = 1; /* Accept command byte, adjust for params later */ 1337 fdctrl->msr &= ~(FD_MSR_CMDBUSY | FD_MSR_DIO); 1338 fdctrl->msr |= FD_MSR_RQM; 1339 } 1340 1341 /* Update the state to allow the guest to read out the command status. 1342 * @fifo_len is the number of result bytes to be read out. */ 1343 static void fdctrl_to_result_phase(FDCtrl *fdctrl, int fifo_len) 1344 { 1345 fdctrl->phase = FD_PHASE_RESULT; 1346 fdctrl->data_dir = FD_DIR_READ; 1347 fdctrl->data_len = fifo_len; 1348 fdctrl->data_pos = 0; 1349 fdctrl->msr |= FD_MSR_CMDBUSY | FD_MSR_RQM | FD_MSR_DIO; 1350 } 1351 1352 /* Set an error: unimplemented/unknown command */ 1353 static void fdctrl_unimplemented(FDCtrl *fdctrl, int direction) 1354 { 1355 qemu_log_mask(LOG_UNIMP, "fdc: unimplemented command 0x%02x\n", 1356 fdctrl->fifo[0]); 1357 fdctrl->fifo[0] = FD_SR0_INVCMD; 1358 fdctrl_to_result_phase(fdctrl, 1); 1359 } 1360 1361 /* Seek to next sector 1362 * returns 0 when end of track reached (for DBL_SIDES on head 1) 1363 * otherwise returns 1 1364 */ 1365 static int fdctrl_seek_to_next_sect(FDCtrl *fdctrl, FDrive *cur_drv) 1366 { 1367 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n", 1368 cur_drv->head, cur_drv->track, cur_drv->sect, 1369 fd_sector(cur_drv)); 1370 /* XXX: cur_drv->sect >= cur_drv->last_sect should be an 1371 error in fact */ 1372 uint8_t new_head = cur_drv->head; 1373 uint8_t new_track = cur_drv->track; 1374 uint8_t new_sect = cur_drv->sect; 1375 1376 int ret = 1; 1377 1378 if (new_sect >= cur_drv->last_sect || 1379 new_sect == fdctrl->eot) { 1380 new_sect = 1; 1381 if (FD_MULTI_TRACK(fdctrl->data_state)) { 1382 if (new_head == 0 && 1383 (cur_drv->flags & FDISK_DBL_SIDES) != 0) { 1384 new_head = 1; 1385 } else { 1386 new_head = 0; 1387 new_track++; 1388 fdctrl->status0 |= FD_SR0_SEEK; 1389 if ((cur_drv->flags & FDISK_DBL_SIDES) == 0) { 1390 ret = 0; 1391 } 1392 } 1393 } else { 1394 fdctrl->status0 |= FD_SR0_SEEK; 1395 new_track++; 1396 ret = 0; 1397 } 1398 if (ret == 1) { 1399 FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n", 1400 new_head, new_track, new_sect, fd_sector(cur_drv)); 1401 } 1402 } else { 1403 new_sect++; 1404 } 1405 fd_seek(cur_drv, new_head, new_track, new_sect, 1); 1406 return ret; 1407 } 1408 1409 /* Callback for transfer end (stop or abort) */ 1410 static void fdctrl_stop_transfer(FDCtrl *fdctrl, uint8_t status0, 1411 uint8_t status1, uint8_t status2) 1412 { 1413 FDrive *cur_drv; 1414 cur_drv = get_cur_drv(fdctrl); 1415 1416 fdctrl->status0 &= ~(FD_SR0_DS0 | FD_SR0_DS1 | FD_SR0_HEAD); 1417 fdctrl->status0 |= GET_CUR_DRV(fdctrl); 1418 if (cur_drv->head) { 1419 fdctrl->status0 |= FD_SR0_HEAD; 1420 } 1421 fdctrl->status0 |= status0; 1422 1423 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n", 1424 status0, status1, status2, fdctrl->status0); 1425 fdctrl->fifo[0] = fdctrl->status0; 1426 fdctrl->fifo[1] = status1; 1427 fdctrl->fifo[2] = status2; 1428 fdctrl->fifo[3] = cur_drv->track; 1429 fdctrl->fifo[4] = cur_drv->head; 1430 fdctrl->fifo[5] = cur_drv->sect; 1431 fdctrl->fifo[6] = FD_SECTOR_SC; 1432 fdctrl->data_dir = FD_DIR_READ; 1433 if (!(fdctrl->msr & FD_MSR_NONDMA)) { 1434 IsaDmaClass *k = ISADMA_GET_CLASS(fdctrl->dma); 1435 k->release_DREQ(fdctrl->dma, fdctrl->dma_chann); 1436 } 1437 fdctrl->msr |= FD_MSR_RQM | FD_MSR_DIO; 1438 fdctrl->msr &= ~FD_MSR_NONDMA; 1439 1440 fdctrl_to_result_phase(fdctrl, 7); 1441 fdctrl_raise_irq(fdctrl); 1442 } 1443 1444 /* Prepare a data transfer (either DMA or FIFO) */ 1445 static void fdctrl_start_transfer(FDCtrl *fdctrl, int direction) 1446 { 1447 FDrive *cur_drv; 1448 uint8_t kh, kt, ks; 1449 1450 SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); 1451 cur_drv = get_cur_drv(fdctrl); 1452 kt = fdctrl->fifo[2]; 1453 kh = fdctrl->fifo[3]; 1454 ks = fdctrl->fifo[4]; 1455 FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n", 1456 GET_CUR_DRV(fdctrl), kh, kt, ks, 1457 fd_sector_calc(kh, kt, ks, cur_drv->last_sect, 1458 NUM_SIDES(cur_drv))); 1459 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) { 1460 case 2: 1461 /* sect too big */ 1462 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); 1463 fdctrl->fifo[3] = kt; 1464 fdctrl->fifo[4] = kh; 1465 fdctrl->fifo[5] = ks; 1466 return; 1467 case 3: 1468 /* track too big */ 1469 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00); 1470 fdctrl->fifo[3] = kt; 1471 fdctrl->fifo[4] = kh; 1472 fdctrl->fifo[5] = ks; 1473 return; 1474 case 4: 1475 /* No seek enabled */ 1476 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); 1477 fdctrl->fifo[3] = kt; 1478 fdctrl->fifo[4] = kh; 1479 fdctrl->fifo[5] = ks; 1480 return; 1481 case 1: 1482 fdctrl->status0 |= FD_SR0_SEEK; 1483 break; 1484 default: 1485 break; 1486 } 1487 1488 /* Check the data rate. If the programmed data rate does not match 1489 * the currently inserted medium, the operation has to fail. */ 1490 if (fdctrl->check_media_rate && 1491 (fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) { 1492 FLOPPY_DPRINTF("data rate mismatch (fdc=%d, media=%d)\n", 1493 fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate); 1494 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00); 1495 fdctrl->fifo[3] = kt; 1496 fdctrl->fifo[4] = kh; 1497 fdctrl->fifo[5] = ks; 1498 return; 1499 } 1500 1501 /* Set the FIFO state */ 1502 fdctrl->data_dir = direction; 1503 fdctrl->data_pos = 0; 1504 assert(fdctrl->msr & FD_MSR_CMDBUSY); 1505 if (fdctrl->fifo[0] & 0x80) 1506 fdctrl->data_state |= FD_STATE_MULTI; 1507 else 1508 fdctrl->data_state &= ~FD_STATE_MULTI; 1509 if (fdctrl->fifo[5] == 0) { 1510 fdctrl->data_len = fdctrl->fifo[8]; 1511 } else { 1512 int tmp; 1513 fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]); 1514 tmp = (fdctrl->fifo[6] - ks + 1); 1515 if (fdctrl->fifo[0] & 0x80) 1516 tmp += fdctrl->fifo[6]; 1517 fdctrl->data_len *= tmp; 1518 } 1519 fdctrl->eot = fdctrl->fifo[6]; 1520 if (fdctrl->dor & FD_DOR_DMAEN) { 1521 IsaDmaTransferMode dma_mode; 1522 IsaDmaClass *k = ISADMA_GET_CLASS(fdctrl->dma); 1523 bool dma_mode_ok; 1524 /* DMA transfer are enabled. Check if DMA channel is well programmed */ 1525 dma_mode = k->get_transfer_mode(fdctrl->dma, fdctrl->dma_chann); 1526 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n", 1527 dma_mode, direction, 1528 (128 << fdctrl->fifo[5]) * 1529 (cur_drv->last_sect - ks + 1), fdctrl->data_len); 1530 switch (direction) { 1531 case FD_DIR_SCANE: 1532 case FD_DIR_SCANL: 1533 case FD_DIR_SCANH: 1534 dma_mode_ok = (dma_mode == ISADMA_TRANSFER_VERIFY); 1535 break; 1536 case FD_DIR_WRITE: 1537 dma_mode_ok = (dma_mode == ISADMA_TRANSFER_WRITE); 1538 break; 1539 case FD_DIR_READ: 1540 dma_mode_ok = (dma_mode == ISADMA_TRANSFER_READ); 1541 break; 1542 case FD_DIR_VERIFY: 1543 dma_mode_ok = true; 1544 break; 1545 default: 1546 dma_mode_ok = false; 1547 break; 1548 } 1549 if (dma_mode_ok) { 1550 /* No access is allowed until DMA transfer has completed */ 1551 fdctrl->msr &= ~FD_MSR_RQM; 1552 if (direction != FD_DIR_VERIFY) { 1553 /* Now, we just have to wait for the DMA controller to 1554 * recall us... 1555 */ 1556 k->hold_DREQ(fdctrl->dma, fdctrl->dma_chann); 1557 k->schedule(fdctrl->dma); 1558 } else { 1559 /* Start transfer */ 1560 fdctrl_transfer_handler(fdctrl, fdctrl->dma_chann, 0, 1561 fdctrl->data_len); 1562 } 1563 return; 1564 } else { 1565 FLOPPY_DPRINTF("bad dma_mode=%d direction=%d\n", dma_mode, 1566 direction); 1567 } 1568 } 1569 FLOPPY_DPRINTF("start non-DMA transfer\n"); 1570 fdctrl->msr |= FD_MSR_NONDMA | FD_MSR_RQM; 1571 if (direction != FD_DIR_WRITE) 1572 fdctrl->msr |= FD_MSR_DIO; 1573 /* IO based transfer: calculate len */ 1574 fdctrl_raise_irq(fdctrl); 1575 } 1576 1577 /* Prepare a transfer of deleted data */ 1578 static void fdctrl_start_transfer_del(FDCtrl *fdctrl, int direction) 1579 { 1580 qemu_log_mask(LOG_UNIMP, "fdctrl_start_transfer_del() unimplemented\n"); 1581 1582 /* We don't handle deleted data, 1583 * so we don't return *ANYTHING* 1584 */ 1585 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00); 1586 } 1587 1588 /* handlers for DMA transfers */ 1589 static int fdctrl_transfer_handler (void *opaque, int nchan, 1590 int dma_pos, int dma_len) 1591 { 1592 FDCtrl *fdctrl; 1593 FDrive *cur_drv; 1594 int len, start_pos, rel_pos; 1595 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00; 1596 IsaDmaClass *k; 1597 1598 fdctrl = opaque; 1599 if (fdctrl->msr & FD_MSR_RQM) { 1600 FLOPPY_DPRINTF("Not in DMA transfer mode !\n"); 1601 return 0; 1602 } 1603 k = ISADMA_GET_CLASS(fdctrl->dma); 1604 cur_drv = get_cur_drv(fdctrl); 1605 if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL || 1606 fdctrl->data_dir == FD_DIR_SCANH) 1607 status2 = FD_SR2_SNS; 1608 if (dma_len > fdctrl->data_len) 1609 dma_len = fdctrl->data_len; 1610 if (cur_drv->blk == NULL) { 1611 if (fdctrl->data_dir == FD_DIR_WRITE) 1612 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00); 1613 else 1614 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); 1615 len = 0; 1616 goto transfer_error; 1617 } 1618 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN; 1619 for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) { 1620 len = dma_len - fdctrl->data_pos; 1621 if (len + rel_pos > FD_SECTOR_LEN) 1622 len = FD_SECTOR_LEN - rel_pos; 1623 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x " 1624 "(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos, 1625 fdctrl->data_len, GET_CUR_DRV(fdctrl), cur_drv->head, 1626 cur_drv->track, cur_drv->sect, fd_sector(cur_drv), 1627 fd_sector(cur_drv) * FD_SECTOR_LEN); 1628 if (fdctrl->data_dir != FD_DIR_WRITE || 1629 len < FD_SECTOR_LEN || rel_pos != 0) { 1630 /* READ & SCAN commands and realign to a sector for WRITE */ 1631 if (blk_read(cur_drv->blk, fd_sector(cur_drv), 1632 fdctrl->fifo, 1) < 0) { 1633 FLOPPY_DPRINTF("Floppy: error getting sector %d\n", 1634 fd_sector(cur_drv)); 1635 /* Sure, image size is too small... */ 1636 memset(fdctrl->fifo, 0, FD_SECTOR_LEN); 1637 } 1638 } 1639 switch (fdctrl->data_dir) { 1640 case FD_DIR_READ: 1641 /* READ commands */ 1642 k->write_memory(fdctrl->dma, nchan, fdctrl->fifo + rel_pos, 1643 fdctrl->data_pos, len); 1644 break; 1645 case FD_DIR_WRITE: 1646 /* WRITE commands */ 1647 if (cur_drv->ro) { 1648 /* Handle readonly medium early, no need to do DMA, touch the 1649 * LED or attempt any writes. A real floppy doesn't attempt 1650 * to write to readonly media either. */ 1651 fdctrl_stop_transfer(fdctrl, 1652 FD_SR0_ABNTERM | FD_SR0_SEEK, FD_SR1_NW, 1653 0x00); 1654 goto transfer_error; 1655 } 1656 1657 k->read_memory(fdctrl->dma, nchan, fdctrl->fifo + rel_pos, 1658 fdctrl->data_pos, len); 1659 if (blk_write(cur_drv->blk, fd_sector(cur_drv), 1660 fdctrl->fifo, 1) < 0) { 1661 FLOPPY_DPRINTF("error writing sector %d\n", 1662 fd_sector(cur_drv)); 1663 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00); 1664 goto transfer_error; 1665 } 1666 break; 1667 case FD_DIR_VERIFY: 1668 /* VERIFY commands */ 1669 break; 1670 default: 1671 /* SCAN commands */ 1672 { 1673 uint8_t tmpbuf[FD_SECTOR_LEN]; 1674 int ret; 1675 k->read_memory(fdctrl->dma, nchan, tmpbuf, fdctrl->data_pos, 1676 len); 1677 ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len); 1678 if (ret == 0) { 1679 status2 = FD_SR2_SEH; 1680 goto end_transfer; 1681 } 1682 if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) || 1683 (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) { 1684 status2 = 0x00; 1685 goto end_transfer; 1686 } 1687 } 1688 break; 1689 } 1690 fdctrl->data_pos += len; 1691 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN; 1692 if (rel_pos == 0) { 1693 /* Seek to next sector */ 1694 if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) 1695 break; 1696 } 1697 } 1698 end_transfer: 1699 len = fdctrl->data_pos - start_pos; 1700 FLOPPY_DPRINTF("end transfer %d %d %d\n", 1701 fdctrl->data_pos, len, fdctrl->data_len); 1702 if (fdctrl->data_dir == FD_DIR_SCANE || 1703 fdctrl->data_dir == FD_DIR_SCANL || 1704 fdctrl->data_dir == FD_DIR_SCANH) 1705 status2 = FD_SR2_SEH; 1706 fdctrl->data_len -= len; 1707 fdctrl_stop_transfer(fdctrl, status0, status1, status2); 1708 transfer_error: 1709 1710 return len; 1711 } 1712 1713 /* Data register : 0x05 */ 1714 static uint32_t fdctrl_read_data(FDCtrl *fdctrl) 1715 { 1716 FDrive *cur_drv; 1717 uint32_t retval = 0; 1718 uint32_t pos; 1719 1720 cur_drv = get_cur_drv(fdctrl); 1721 fdctrl->dsr &= ~FD_DSR_PWRDOWN; 1722 if (!(fdctrl->msr & FD_MSR_RQM) || !(fdctrl->msr & FD_MSR_DIO)) { 1723 FLOPPY_DPRINTF("error: controller not ready for reading\n"); 1724 return 0; 1725 } 1726 1727 /* If data_len spans multiple sectors, the current position in the FIFO 1728 * wraps around while fdctrl->data_pos is the real position in the whole 1729 * request. */ 1730 pos = fdctrl->data_pos; 1731 pos %= FD_SECTOR_LEN; 1732 1733 switch (fdctrl->phase) { 1734 case FD_PHASE_EXECUTION: 1735 assert(fdctrl->msr & FD_MSR_NONDMA); 1736 if (pos == 0) { 1737 if (fdctrl->data_pos != 0) 1738 if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) { 1739 FLOPPY_DPRINTF("error seeking to next sector %d\n", 1740 fd_sector(cur_drv)); 1741 return 0; 1742 } 1743 if (blk_read(cur_drv->blk, fd_sector(cur_drv), fdctrl->fifo, 1) 1744 < 0) { 1745 FLOPPY_DPRINTF("error getting sector %d\n", 1746 fd_sector(cur_drv)); 1747 /* Sure, image size is too small... */ 1748 memset(fdctrl->fifo, 0, FD_SECTOR_LEN); 1749 } 1750 } 1751 1752 if (++fdctrl->data_pos == fdctrl->data_len) { 1753 fdctrl->msr &= ~FD_MSR_RQM; 1754 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); 1755 } 1756 break; 1757 1758 case FD_PHASE_RESULT: 1759 assert(!(fdctrl->msr & FD_MSR_NONDMA)); 1760 if (++fdctrl->data_pos == fdctrl->data_len) { 1761 fdctrl->msr &= ~FD_MSR_RQM; 1762 fdctrl_to_command_phase(fdctrl); 1763 fdctrl_reset_irq(fdctrl); 1764 } 1765 break; 1766 1767 case FD_PHASE_COMMAND: 1768 default: 1769 abort(); 1770 } 1771 1772 retval = fdctrl->fifo[pos]; 1773 FLOPPY_DPRINTF("data register: 0x%02x\n", retval); 1774 1775 return retval; 1776 } 1777 1778 static void fdctrl_format_sector(FDCtrl *fdctrl) 1779 { 1780 FDrive *cur_drv; 1781 uint8_t kh, kt, ks; 1782 1783 SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); 1784 cur_drv = get_cur_drv(fdctrl); 1785 kt = fdctrl->fifo[6]; 1786 kh = fdctrl->fifo[7]; 1787 ks = fdctrl->fifo[8]; 1788 FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n", 1789 GET_CUR_DRV(fdctrl), kh, kt, ks, 1790 fd_sector_calc(kh, kt, ks, cur_drv->last_sect, 1791 NUM_SIDES(cur_drv))); 1792 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) { 1793 case 2: 1794 /* sect too big */ 1795 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); 1796 fdctrl->fifo[3] = kt; 1797 fdctrl->fifo[4] = kh; 1798 fdctrl->fifo[5] = ks; 1799 return; 1800 case 3: 1801 /* track too big */ 1802 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00); 1803 fdctrl->fifo[3] = kt; 1804 fdctrl->fifo[4] = kh; 1805 fdctrl->fifo[5] = ks; 1806 return; 1807 case 4: 1808 /* No seek enabled */ 1809 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); 1810 fdctrl->fifo[3] = kt; 1811 fdctrl->fifo[4] = kh; 1812 fdctrl->fifo[5] = ks; 1813 return; 1814 case 1: 1815 fdctrl->status0 |= FD_SR0_SEEK; 1816 break; 1817 default: 1818 break; 1819 } 1820 memset(fdctrl->fifo, 0, FD_SECTOR_LEN); 1821 if (cur_drv->blk == NULL || 1822 blk_write(cur_drv->blk, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) { 1823 FLOPPY_DPRINTF("error formatting sector %d\n", fd_sector(cur_drv)); 1824 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00); 1825 } else { 1826 if (cur_drv->sect == cur_drv->last_sect) { 1827 fdctrl->data_state &= ~FD_STATE_FORMAT; 1828 /* Last sector done */ 1829 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); 1830 } else { 1831 /* More to do */ 1832 fdctrl->data_pos = 0; 1833 fdctrl->data_len = 4; 1834 } 1835 } 1836 } 1837 1838 static void fdctrl_handle_lock(FDCtrl *fdctrl, int direction) 1839 { 1840 fdctrl->lock = (fdctrl->fifo[0] & 0x80) ? 1 : 0; 1841 fdctrl->fifo[0] = fdctrl->lock << 4; 1842 fdctrl_to_result_phase(fdctrl, 1); 1843 } 1844 1845 static void fdctrl_handle_dumpreg(FDCtrl *fdctrl, int direction) 1846 { 1847 FDrive *cur_drv = get_cur_drv(fdctrl); 1848 1849 /* Drives position */ 1850 fdctrl->fifo[0] = drv0(fdctrl)->track; 1851 fdctrl->fifo[1] = drv1(fdctrl)->track; 1852 #if MAX_FD == 4 1853 fdctrl->fifo[2] = drv2(fdctrl)->track; 1854 fdctrl->fifo[3] = drv3(fdctrl)->track; 1855 #else 1856 fdctrl->fifo[2] = 0; 1857 fdctrl->fifo[3] = 0; 1858 #endif 1859 /* timers */ 1860 fdctrl->fifo[4] = fdctrl->timer0; 1861 fdctrl->fifo[5] = (fdctrl->timer1 << 1) | (fdctrl->dor & FD_DOR_DMAEN ? 1 : 0); 1862 fdctrl->fifo[6] = cur_drv->last_sect; 1863 fdctrl->fifo[7] = (fdctrl->lock << 7) | 1864 (cur_drv->perpendicular << 2); 1865 fdctrl->fifo[8] = fdctrl->config; 1866 fdctrl->fifo[9] = fdctrl->precomp_trk; 1867 fdctrl_to_result_phase(fdctrl, 10); 1868 } 1869 1870 static void fdctrl_handle_version(FDCtrl *fdctrl, int direction) 1871 { 1872 /* Controller's version */ 1873 fdctrl->fifo[0] = fdctrl->version; 1874 fdctrl_to_result_phase(fdctrl, 1); 1875 } 1876 1877 static void fdctrl_handle_partid(FDCtrl *fdctrl, int direction) 1878 { 1879 fdctrl->fifo[0] = 0x41; /* Stepping 1 */ 1880 fdctrl_to_result_phase(fdctrl, 1); 1881 } 1882 1883 static void fdctrl_handle_restore(FDCtrl *fdctrl, int direction) 1884 { 1885 FDrive *cur_drv = get_cur_drv(fdctrl); 1886 1887 /* Drives position */ 1888 drv0(fdctrl)->track = fdctrl->fifo[3]; 1889 drv1(fdctrl)->track = fdctrl->fifo[4]; 1890 #if MAX_FD == 4 1891 drv2(fdctrl)->track = fdctrl->fifo[5]; 1892 drv3(fdctrl)->track = fdctrl->fifo[6]; 1893 #endif 1894 /* timers */ 1895 fdctrl->timer0 = fdctrl->fifo[7]; 1896 fdctrl->timer1 = fdctrl->fifo[8]; 1897 cur_drv->last_sect = fdctrl->fifo[9]; 1898 fdctrl->lock = fdctrl->fifo[10] >> 7; 1899 cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF; 1900 fdctrl->config = fdctrl->fifo[11]; 1901 fdctrl->precomp_trk = fdctrl->fifo[12]; 1902 fdctrl->pwrd = fdctrl->fifo[13]; 1903 fdctrl_to_command_phase(fdctrl); 1904 } 1905 1906 static void fdctrl_handle_save(FDCtrl *fdctrl, int direction) 1907 { 1908 FDrive *cur_drv = get_cur_drv(fdctrl); 1909 1910 fdctrl->fifo[0] = 0; 1911 fdctrl->fifo[1] = 0; 1912 /* Drives position */ 1913 fdctrl->fifo[2] = drv0(fdctrl)->track; 1914 fdctrl->fifo[3] = drv1(fdctrl)->track; 1915 #if MAX_FD == 4 1916 fdctrl->fifo[4] = drv2(fdctrl)->track; 1917 fdctrl->fifo[5] = drv3(fdctrl)->track; 1918 #else 1919 fdctrl->fifo[4] = 0; 1920 fdctrl->fifo[5] = 0; 1921 #endif 1922 /* timers */ 1923 fdctrl->fifo[6] = fdctrl->timer0; 1924 fdctrl->fifo[7] = fdctrl->timer1; 1925 fdctrl->fifo[8] = cur_drv->last_sect; 1926 fdctrl->fifo[9] = (fdctrl->lock << 7) | 1927 (cur_drv->perpendicular << 2); 1928 fdctrl->fifo[10] = fdctrl->config; 1929 fdctrl->fifo[11] = fdctrl->precomp_trk; 1930 fdctrl->fifo[12] = fdctrl->pwrd; 1931 fdctrl->fifo[13] = 0; 1932 fdctrl->fifo[14] = 0; 1933 fdctrl_to_result_phase(fdctrl, 15); 1934 } 1935 1936 static void fdctrl_handle_readid(FDCtrl *fdctrl, int direction) 1937 { 1938 FDrive *cur_drv = get_cur_drv(fdctrl); 1939 1940 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1; 1941 timer_mod(fdctrl->result_timer, 1942 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + (get_ticks_per_sec() / 50)); 1943 } 1944 1945 static void fdctrl_handle_format_track(FDCtrl *fdctrl, int direction) 1946 { 1947 FDrive *cur_drv; 1948 1949 SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); 1950 cur_drv = get_cur_drv(fdctrl); 1951 fdctrl->data_state |= FD_STATE_FORMAT; 1952 if (fdctrl->fifo[0] & 0x80) 1953 fdctrl->data_state |= FD_STATE_MULTI; 1954 else 1955 fdctrl->data_state &= ~FD_STATE_MULTI; 1956 cur_drv->bps = 1957 fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2]; 1958 #if 0 1959 cur_drv->last_sect = 1960 cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] : 1961 fdctrl->fifo[3] / 2; 1962 #else 1963 cur_drv->last_sect = fdctrl->fifo[3]; 1964 #endif 1965 /* TODO: implement format using DMA expected by the Bochs BIOS 1966 * and Linux fdformat (read 3 bytes per sector via DMA and fill 1967 * the sector with the specified fill byte 1968 */ 1969 fdctrl->data_state &= ~FD_STATE_FORMAT; 1970 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); 1971 } 1972 1973 static void fdctrl_handle_specify(FDCtrl *fdctrl, int direction) 1974 { 1975 fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF; 1976 fdctrl->timer1 = fdctrl->fifo[2] >> 1; 1977 if (fdctrl->fifo[2] & 1) 1978 fdctrl->dor &= ~FD_DOR_DMAEN; 1979 else 1980 fdctrl->dor |= FD_DOR_DMAEN; 1981 /* No result back */ 1982 fdctrl_to_command_phase(fdctrl); 1983 } 1984 1985 static void fdctrl_handle_sense_drive_status(FDCtrl *fdctrl, int direction) 1986 { 1987 FDrive *cur_drv; 1988 1989 SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); 1990 cur_drv = get_cur_drv(fdctrl); 1991 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1; 1992 /* 1 Byte status back */ 1993 fdctrl->fifo[0] = (cur_drv->ro << 6) | 1994 (cur_drv->track == 0 ? 0x10 : 0x00) | 1995 (cur_drv->head << 2) | 1996 GET_CUR_DRV(fdctrl) | 1997 0x28; 1998 fdctrl_to_result_phase(fdctrl, 1); 1999 } 2000 2001 static void fdctrl_handle_recalibrate(FDCtrl *fdctrl, int direction) 2002 { 2003 FDrive *cur_drv; 2004 2005 SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); 2006 cur_drv = get_cur_drv(fdctrl); 2007 fd_recalibrate(cur_drv); 2008 fdctrl_to_command_phase(fdctrl); 2009 /* Raise Interrupt */ 2010 fdctrl->status0 |= FD_SR0_SEEK; 2011 fdctrl_raise_irq(fdctrl); 2012 } 2013 2014 static void fdctrl_handle_sense_interrupt_status(FDCtrl *fdctrl, int direction) 2015 { 2016 FDrive *cur_drv = get_cur_drv(fdctrl); 2017 2018 if (fdctrl->reset_sensei > 0) { 2019 fdctrl->fifo[0] = 2020 FD_SR0_RDYCHG + FD_RESET_SENSEI_COUNT - fdctrl->reset_sensei; 2021 fdctrl->reset_sensei--; 2022 } else if (!(fdctrl->sra & FD_SRA_INTPEND)) { 2023 fdctrl->fifo[0] = FD_SR0_INVCMD; 2024 fdctrl_to_result_phase(fdctrl, 1); 2025 return; 2026 } else { 2027 fdctrl->fifo[0] = 2028 (fdctrl->status0 & ~(FD_SR0_HEAD | FD_SR0_DS1 | FD_SR0_DS0)) 2029 | GET_CUR_DRV(fdctrl); 2030 } 2031 2032 fdctrl->fifo[1] = cur_drv->track; 2033 fdctrl_to_result_phase(fdctrl, 2); 2034 fdctrl_reset_irq(fdctrl); 2035 fdctrl->status0 = FD_SR0_RDYCHG; 2036 } 2037 2038 static void fdctrl_handle_seek(FDCtrl *fdctrl, int direction) 2039 { 2040 FDrive *cur_drv; 2041 2042 SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); 2043 cur_drv = get_cur_drv(fdctrl); 2044 fdctrl_to_command_phase(fdctrl); 2045 /* The seek command just sends step pulses to the drive and doesn't care if 2046 * there is a medium inserted of if it's banging the head against the drive. 2047 */ 2048 fd_seek(cur_drv, cur_drv->head, fdctrl->fifo[2], cur_drv->sect, 1); 2049 /* Raise Interrupt */ 2050 fdctrl->status0 |= FD_SR0_SEEK; 2051 fdctrl_raise_irq(fdctrl); 2052 } 2053 2054 static void fdctrl_handle_perpendicular_mode(FDCtrl *fdctrl, int direction) 2055 { 2056 FDrive *cur_drv = get_cur_drv(fdctrl); 2057 2058 if (fdctrl->fifo[1] & 0x80) 2059 cur_drv->perpendicular = fdctrl->fifo[1] & 0x7; 2060 /* No result back */ 2061 fdctrl_to_command_phase(fdctrl); 2062 } 2063 2064 static void fdctrl_handle_configure(FDCtrl *fdctrl, int direction) 2065 { 2066 fdctrl->config = fdctrl->fifo[2]; 2067 fdctrl->precomp_trk = fdctrl->fifo[3]; 2068 /* No result back */ 2069 fdctrl_to_command_phase(fdctrl); 2070 } 2071 2072 static void fdctrl_handle_powerdown_mode(FDCtrl *fdctrl, int direction) 2073 { 2074 fdctrl->pwrd = fdctrl->fifo[1]; 2075 fdctrl->fifo[0] = fdctrl->fifo[1]; 2076 fdctrl_to_result_phase(fdctrl, 1); 2077 } 2078 2079 static void fdctrl_handle_option(FDCtrl *fdctrl, int direction) 2080 { 2081 /* No result back */ 2082 fdctrl_to_command_phase(fdctrl); 2083 } 2084 2085 static void fdctrl_handle_drive_specification_command(FDCtrl *fdctrl, int direction) 2086 { 2087 FDrive *cur_drv = get_cur_drv(fdctrl); 2088 uint32_t pos; 2089 2090 pos = fdctrl->data_pos - 1; 2091 pos %= FD_SECTOR_LEN; 2092 if (fdctrl->fifo[pos] & 0x80) { 2093 /* Command parameters done */ 2094 if (fdctrl->fifo[pos] & 0x40) { 2095 fdctrl->fifo[0] = fdctrl->fifo[1]; 2096 fdctrl->fifo[2] = 0; 2097 fdctrl->fifo[3] = 0; 2098 fdctrl_to_result_phase(fdctrl, 4); 2099 } else { 2100 fdctrl_to_command_phase(fdctrl); 2101 } 2102 } else if (fdctrl->data_len > 7) { 2103 /* ERROR */ 2104 fdctrl->fifo[0] = 0x80 | 2105 (cur_drv->head << 2) | GET_CUR_DRV(fdctrl); 2106 fdctrl_to_result_phase(fdctrl, 1); 2107 } 2108 } 2109 2110 static void fdctrl_handle_relative_seek_in(FDCtrl *fdctrl, int direction) 2111 { 2112 FDrive *cur_drv; 2113 2114 SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); 2115 cur_drv = get_cur_drv(fdctrl); 2116 if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) { 2117 fd_seek(cur_drv, cur_drv->head, cur_drv->max_track - 1, 2118 cur_drv->sect, 1); 2119 } else { 2120 fd_seek(cur_drv, cur_drv->head, 2121 cur_drv->track + fdctrl->fifo[2], cur_drv->sect, 1); 2122 } 2123 fdctrl_to_command_phase(fdctrl); 2124 /* Raise Interrupt */ 2125 fdctrl->status0 |= FD_SR0_SEEK; 2126 fdctrl_raise_irq(fdctrl); 2127 } 2128 2129 static void fdctrl_handle_relative_seek_out(FDCtrl *fdctrl, int direction) 2130 { 2131 FDrive *cur_drv; 2132 2133 SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); 2134 cur_drv = get_cur_drv(fdctrl); 2135 if (fdctrl->fifo[2] > cur_drv->track) { 2136 fd_seek(cur_drv, cur_drv->head, 0, cur_drv->sect, 1); 2137 } else { 2138 fd_seek(cur_drv, cur_drv->head, 2139 cur_drv->track - fdctrl->fifo[2], cur_drv->sect, 1); 2140 } 2141 fdctrl_to_command_phase(fdctrl); 2142 /* Raise Interrupt */ 2143 fdctrl->status0 |= FD_SR0_SEEK; 2144 fdctrl_raise_irq(fdctrl); 2145 } 2146 2147 /* 2148 * Handlers for the execution phase of each command 2149 */ 2150 typedef struct FDCtrlCommand { 2151 uint8_t value; 2152 uint8_t mask; 2153 const char* name; 2154 int parameters; 2155 void (*handler)(FDCtrl *fdctrl, int direction); 2156 int direction; 2157 } FDCtrlCommand; 2158 2159 static const FDCtrlCommand handlers[] = { 2160 { FD_CMD_READ, 0x1f, "READ", 8, fdctrl_start_transfer, FD_DIR_READ }, 2161 { FD_CMD_WRITE, 0x3f, "WRITE", 8, fdctrl_start_transfer, FD_DIR_WRITE }, 2162 { FD_CMD_SEEK, 0xff, "SEEK", 2, fdctrl_handle_seek }, 2163 { FD_CMD_SENSE_INTERRUPT_STATUS, 0xff, "SENSE INTERRUPT STATUS", 0, fdctrl_handle_sense_interrupt_status }, 2164 { FD_CMD_RECALIBRATE, 0xff, "RECALIBRATE", 1, fdctrl_handle_recalibrate }, 2165 { FD_CMD_FORMAT_TRACK, 0xbf, "FORMAT TRACK", 5, fdctrl_handle_format_track }, 2166 { FD_CMD_READ_TRACK, 0xbf, "READ TRACK", 8, fdctrl_start_transfer, FD_DIR_READ }, 2167 { FD_CMD_RESTORE, 0xff, "RESTORE", 17, fdctrl_handle_restore }, /* part of READ DELETED DATA */ 2168 { FD_CMD_SAVE, 0xff, "SAVE", 0, fdctrl_handle_save }, /* part of READ DELETED DATA */ 2169 { FD_CMD_READ_DELETED, 0x1f, "READ DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_READ }, 2170 { FD_CMD_SCAN_EQUAL, 0x1f, "SCAN EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANE }, 2171 { FD_CMD_VERIFY, 0x1f, "VERIFY", 8, fdctrl_start_transfer, FD_DIR_VERIFY }, 2172 { FD_CMD_SCAN_LOW_OR_EQUAL, 0x1f, "SCAN LOW OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANL }, 2173 { FD_CMD_SCAN_HIGH_OR_EQUAL, 0x1f, "SCAN HIGH OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANH }, 2174 { FD_CMD_WRITE_DELETED, 0x3f, "WRITE DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_WRITE }, 2175 { FD_CMD_READ_ID, 0xbf, "READ ID", 1, fdctrl_handle_readid }, 2176 { FD_CMD_SPECIFY, 0xff, "SPECIFY", 2, fdctrl_handle_specify }, 2177 { FD_CMD_SENSE_DRIVE_STATUS, 0xff, "SENSE DRIVE STATUS", 1, fdctrl_handle_sense_drive_status }, 2178 { FD_CMD_PERPENDICULAR_MODE, 0xff, "PERPENDICULAR MODE", 1, fdctrl_handle_perpendicular_mode }, 2179 { FD_CMD_CONFIGURE, 0xff, "CONFIGURE", 3, fdctrl_handle_configure }, 2180 { FD_CMD_POWERDOWN_MODE, 0xff, "POWERDOWN MODE", 2, fdctrl_handle_powerdown_mode }, 2181 { FD_CMD_OPTION, 0xff, "OPTION", 1, fdctrl_handle_option }, 2182 { FD_CMD_DRIVE_SPECIFICATION_COMMAND, 0xff, "DRIVE SPECIFICATION COMMAND", 5, fdctrl_handle_drive_specification_command }, 2183 { FD_CMD_RELATIVE_SEEK_OUT, 0xff, "RELATIVE SEEK OUT", 2, fdctrl_handle_relative_seek_out }, 2184 { FD_CMD_FORMAT_AND_WRITE, 0xff, "FORMAT AND WRITE", 10, fdctrl_unimplemented }, 2185 { FD_CMD_RELATIVE_SEEK_IN, 0xff, "RELATIVE SEEK IN", 2, fdctrl_handle_relative_seek_in }, 2186 { FD_CMD_LOCK, 0x7f, "LOCK", 0, fdctrl_handle_lock }, 2187 { FD_CMD_DUMPREG, 0xff, "DUMPREG", 0, fdctrl_handle_dumpreg }, 2188 { FD_CMD_VERSION, 0xff, "VERSION", 0, fdctrl_handle_version }, 2189 { FD_CMD_PART_ID, 0xff, "PART ID", 0, fdctrl_handle_partid }, 2190 { FD_CMD_WRITE, 0x1f, "WRITE (BeOS)", 8, fdctrl_start_transfer, FD_DIR_WRITE }, /* not in specification ; BeOS 4.5 bug */ 2191 { 0, 0, "unknown", 0, fdctrl_unimplemented }, /* default handler */ 2192 }; 2193 /* Associate command to an index in the 'handlers' array */ 2194 static uint8_t command_to_handler[256]; 2195 2196 static const FDCtrlCommand *get_command(uint8_t cmd) 2197 { 2198 int idx; 2199 2200 idx = command_to_handler[cmd]; 2201 FLOPPY_DPRINTF("%s command\n", handlers[idx].name); 2202 return &handlers[idx]; 2203 } 2204 2205 static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value) 2206 { 2207 FDrive *cur_drv; 2208 const FDCtrlCommand *cmd; 2209 uint32_t pos; 2210 2211 /* Reset mode */ 2212 if (!(fdctrl->dor & FD_DOR_nRESET)) { 2213 FLOPPY_DPRINTF("Floppy controller in RESET state !\n"); 2214 return; 2215 } 2216 if (!(fdctrl->msr & FD_MSR_RQM) || (fdctrl->msr & FD_MSR_DIO)) { 2217 FLOPPY_DPRINTF("error: controller not ready for writing\n"); 2218 return; 2219 } 2220 fdctrl->dsr &= ~FD_DSR_PWRDOWN; 2221 2222 FLOPPY_DPRINTF("%s: %02x\n", __func__, value); 2223 2224 /* If data_len spans multiple sectors, the current position in the FIFO 2225 * wraps around while fdctrl->data_pos is the real position in the whole 2226 * request. */ 2227 pos = fdctrl->data_pos++; 2228 pos %= FD_SECTOR_LEN; 2229 fdctrl->fifo[pos] = value; 2230 2231 if (fdctrl->data_pos == fdctrl->data_len) { 2232 fdctrl->msr &= ~FD_MSR_RQM; 2233 } 2234 2235 switch (fdctrl->phase) { 2236 case FD_PHASE_EXECUTION: 2237 /* For DMA requests, RQM should be cleared during execution phase, so 2238 * we would have errored out above. */ 2239 assert(fdctrl->msr & FD_MSR_NONDMA); 2240 2241 /* FIFO data write */ 2242 if (pos == FD_SECTOR_LEN - 1 || 2243 fdctrl->data_pos == fdctrl->data_len) { 2244 cur_drv = get_cur_drv(fdctrl); 2245 if (blk_write(cur_drv->blk, fd_sector(cur_drv), fdctrl->fifo, 1) 2246 < 0) { 2247 FLOPPY_DPRINTF("error writing sector %d\n", 2248 fd_sector(cur_drv)); 2249 break; 2250 } 2251 if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) { 2252 FLOPPY_DPRINTF("error seeking to next sector %d\n", 2253 fd_sector(cur_drv)); 2254 break; 2255 } 2256 } 2257 2258 /* Switch to result phase when done with the transfer */ 2259 if (fdctrl->data_pos == fdctrl->data_len) { 2260 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); 2261 } 2262 break; 2263 2264 case FD_PHASE_COMMAND: 2265 assert(!(fdctrl->msr & FD_MSR_NONDMA)); 2266 assert(fdctrl->data_pos < FD_SECTOR_LEN); 2267 2268 if (pos == 0) { 2269 /* The first byte specifies the command. Now we start reading 2270 * as many parameters as this command requires. */ 2271 cmd = get_command(value); 2272 fdctrl->data_len = cmd->parameters + 1; 2273 if (cmd->parameters) { 2274 fdctrl->msr |= FD_MSR_RQM; 2275 } 2276 fdctrl->msr |= FD_MSR_CMDBUSY; 2277 } 2278 2279 if (fdctrl->data_pos == fdctrl->data_len) { 2280 /* We have all parameters now, execute the command */ 2281 fdctrl->phase = FD_PHASE_EXECUTION; 2282 2283 if (fdctrl->data_state & FD_STATE_FORMAT) { 2284 fdctrl_format_sector(fdctrl); 2285 break; 2286 } 2287 2288 cmd = get_command(fdctrl->fifo[0]); 2289 FLOPPY_DPRINTF("Calling handler for '%s'\n", cmd->name); 2290 cmd->handler(fdctrl, cmd->direction); 2291 } 2292 break; 2293 2294 case FD_PHASE_RESULT: 2295 default: 2296 abort(); 2297 } 2298 } 2299 2300 static void fdctrl_result_timer(void *opaque) 2301 { 2302 FDCtrl *fdctrl = opaque; 2303 FDrive *cur_drv = get_cur_drv(fdctrl); 2304 2305 /* Pretend we are spinning. 2306 * This is needed for Coherent, which uses READ ID to check for 2307 * sector interleaving. 2308 */ 2309 if (cur_drv->last_sect != 0) { 2310 cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1; 2311 } 2312 /* READ_ID can't automatically succeed! */ 2313 if (fdctrl->check_media_rate && 2314 (fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) { 2315 FLOPPY_DPRINTF("read id rate mismatch (fdc=%d, media=%d)\n", 2316 fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate); 2317 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00); 2318 } else { 2319 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); 2320 } 2321 } 2322 2323 static void fdctrl_change_cb(void *opaque, bool load) 2324 { 2325 FDrive *drive = opaque; 2326 2327 drive->media_changed = 1; 2328 drive->media_validated = false; 2329 fd_revalidate(drive); 2330 } 2331 2332 static const BlockDevOps fdctrl_block_ops = { 2333 .change_media_cb = fdctrl_change_cb, 2334 }; 2335 2336 /* Init functions */ 2337 static void fdctrl_connect_drives(FDCtrl *fdctrl, Error **errp) 2338 { 2339 unsigned int i; 2340 FDrive *drive; 2341 2342 for (i = 0; i < MAX_FD; i++) { 2343 drive = &fdctrl->drives[i]; 2344 drive->fdctrl = fdctrl; 2345 2346 if (drive->blk) { 2347 if (blk_get_on_error(drive->blk, 0) != BLOCKDEV_ON_ERROR_ENOSPC) { 2348 error_setg(errp, "fdc doesn't support drive option werror"); 2349 return; 2350 } 2351 if (blk_get_on_error(drive->blk, 1) != BLOCKDEV_ON_ERROR_REPORT) { 2352 error_setg(errp, "fdc doesn't support drive option rerror"); 2353 return; 2354 } 2355 } 2356 2357 fd_init(drive); 2358 if (drive->blk) { 2359 blk_set_dev_ops(drive->blk, &fdctrl_block_ops, drive); 2360 pick_drive_type(drive); 2361 } 2362 fd_revalidate(drive); 2363 } 2364 } 2365 2366 ISADevice *fdctrl_init_isa(ISABus *bus, DriveInfo **fds) 2367 { 2368 DeviceState *dev; 2369 ISADevice *isadev; 2370 2371 isadev = isa_try_create(bus, TYPE_ISA_FDC); 2372 if (!isadev) { 2373 return NULL; 2374 } 2375 dev = DEVICE(isadev); 2376 2377 if (fds[0]) { 2378 qdev_prop_set_drive(dev, "driveA", blk_by_legacy_dinfo(fds[0]), 2379 &error_fatal); 2380 } 2381 if (fds[1]) { 2382 qdev_prop_set_drive(dev, "driveB", blk_by_legacy_dinfo(fds[1]), 2383 &error_fatal); 2384 } 2385 qdev_init_nofail(dev); 2386 2387 return isadev; 2388 } 2389 2390 void fdctrl_init_sysbus(qemu_irq irq, int dma_chann, 2391 hwaddr mmio_base, DriveInfo **fds) 2392 { 2393 FDCtrl *fdctrl; 2394 DeviceState *dev; 2395 SysBusDevice *sbd; 2396 FDCtrlSysBus *sys; 2397 2398 dev = qdev_create(NULL, "sysbus-fdc"); 2399 sys = SYSBUS_FDC(dev); 2400 fdctrl = &sys->state; 2401 fdctrl->dma_chann = dma_chann; /* FIXME */ 2402 if (fds[0]) { 2403 qdev_prop_set_drive(dev, "driveA", blk_by_legacy_dinfo(fds[0]), 2404 &error_fatal); 2405 } 2406 if (fds[1]) { 2407 qdev_prop_set_drive(dev, "driveB", blk_by_legacy_dinfo(fds[1]), 2408 &error_fatal); 2409 } 2410 qdev_init_nofail(dev); 2411 sbd = SYS_BUS_DEVICE(dev); 2412 sysbus_connect_irq(sbd, 0, irq); 2413 sysbus_mmio_map(sbd, 0, mmio_base); 2414 } 2415 2416 void sun4m_fdctrl_init(qemu_irq irq, hwaddr io_base, 2417 DriveInfo **fds, qemu_irq *fdc_tc) 2418 { 2419 DeviceState *dev; 2420 FDCtrlSysBus *sys; 2421 2422 dev = qdev_create(NULL, "SUNW,fdtwo"); 2423 if (fds[0]) { 2424 qdev_prop_set_drive(dev, "drive", blk_by_legacy_dinfo(fds[0]), 2425 &error_fatal); 2426 } 2427 qdev_init_nofail(dev); 2428 sys = SYSBUS_FDC(dev); 2429 sysbus_connect_irq(SYS_BUS_DEVICE(sys), 0, irq); 2430 sysbus_mmio_map(SYS_BUS_DEVICE(sys), 0, io_base); 2431 *fdc_tc = qdev_get_gpio_in(dev, 0); 2432 } 2433 2434 static void fdctrl_realize_common(FDCtrl *fdctrl, Error **errp) 2435 { 2436 int i, j; 2437 static int command_tables_inited = 0; 2438 2439 if (fdctrl->fallback == FLOPPY_DRIVE_TYPE_AUTO) { 2440 error_setg(errp, "Cannot choose a fallback FDrive type of 'auto'"); 2441 } 2442 2443 /* Fill 'command_to_handler' lookup table */ 2444 if (!command_tables_inited) { 2445 command_tables_inited = 1; 2446 for (i = ARRAY_SIZE(handlers) - 1; i >= 0; i--) { 2447 for (j = 0; j < sizeof(command_to_handler); j++) { 2448 if ((j & handlers[i].mask) == handlers[i].value) { 2449 command_to_handler[j] = i; 2450 } 2451 } 2452 } 2453 } 2454 2455 FLOPPY_DPRINTF("init controller\n"); 2456 fdctrl->fifo = qemu_memalign(512, FD_SECTOR_LEN); 2457 fdctrl->fifo_size = 512; 2458 fdctrl->result_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, 2459 fdctrl_result_timer, fdctrl); 2460 2461 fdctrl->version = 0x90; /* Intel 82078 controller */ 2462 fdctrl->config = FD_CONFIG_EIS | FD_CONFIG_EFIFO; /* Implicit seek, polling & FIFO enabled */ 2463 fdctrl->num_floppies = MAX_FD; 2464 2465 if (fdctrl->dma_chann != -1) { 2466 IsaDmaClass *k; 2467 assert(fdctrl->dma); 2468 k = ISADMA_GET_CLASS(fdctrl->dma); 2469 k->register_channel(fdctrl->dma, fdctrl->dma_chann, 2470 &fdctrl_transfer_handler, fdctrl); 2471 } 2472 fdctrl_connect_drives(fdctrl, errp); 2473 } 2474 2475 static const MemoryRegionPortio fdc_portio_list[] = { 2476 { 1, 5, 1, .read = fdctrl_read, .write = fdctrl_write }, 2477 { 7, 1, 1, .read = fdctrl_read, .write = fdctrl_write }, 2478 PORTIO_END_OF_LIST(), 2479 }; 2480 2481 static void isabus_fdc_realize(DeviceState *dev, Error **errp) 2482 { 2483 ISADevice *isadev = ISA_DEVICE(dev); 2484 FDCtrlISABus *isa = ISA_FDC(dev); 2485 FDCtrl *fdctrl = &isa->state; 2486 Error *err = NULL; 2487 2488 isa_register_portio_list(isadev, isa->iobase, fdc_portio_list, fdctrl, 2489 "fdc"); 2490 2491 isa_init_irq(isadev, &fdctrl->irq, isa->irq); 2492 fdctrl->dma_chann = isa->dma; 2493 if (fdctrl->dma_chann != -1) { 2494 fdctrl->dma = isa_get_dma(isa_bus_from_device(isadev), isa->dma); 2495 assert(fdctrl->dma); 2496 } 2497 2498 qdev_set_legacy_instance_id(dev, isa->iobase, 2); 2499 fdctrl_realize_common(fdctrl, &err); 2500 if (err != NULL) { 2501 error_propagate(errp, err); 2502 return; 2503 } 2504 } 2505 2506 static void sysbus_fdc_initfn(Object *obj) 2507 { 2508 SysBusDevice *sbd = SYS_BUS_DEVICE(obj); 2509 FDCtrlSysBus *sys = SYSBUS_FDC(obj); 2510 FDCtrl *fdctrl = &sys->state; 2511 2512 fdctrl->dma_chann = -1; 2513 2514 memory_region_init_io(&fdctrl->iomem, obj, &fdctrl_mem_ops, fdctrl, 2515 "fdc", 0x08); 2516 sysbus_init_mmio(sbd, &fdctrl->iomem); 2517 } 2518 2519 static void sun4m_fdc_initfn(Object *obj) 2520 { 2521 SysBusDevice *sbd = SYS_BUS_DEVICE(obj); 2522 FDCtrlSysBus *sys = SYSBUS_FDC(obj); 2523 FDCtrl *fdctrl = &sys->state; 2524 2525 fdctrl->dma_chann = -1; 2526 2527 memory_region_init_io(&fdctrl->iomem, obj, &fdctrl_mem_strict_ops, 2528 fdctrl, "fdctrl", 0x08); 2529 sysbus_init_mmio(sbd, &fdctrl->iomem); 2530 } 2531 2532 static void sysbus_fdc_common_initfn(Object *obj) 2533 { 2534 DeviceState *dev = DEVICE(obj); 2535 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 2536 FDCtrlSysBus *sys = SYSBUS_FDC(obj); 2537 FDCtrl *fdctrl = &sys->state; 2538 2539 qdev_set_legacy_instance_id(dev, 0 /* io */, 2); /* FIXME */ 2540 2541 sysbus_init_irq(sbd, &fdctrl->irq); 2542 qdev_init_gpio_in(dev, fdctrl_handle_tc, 1); 2543 } 2544 2545 static void sysbus_fdc_common_realize(DeviceState *dev, Error **errp) 2546 { 2547 FDCtrlSysBus *sys = SYSBUS_FDC(dev); 2548 FDCtrl *fdctrl = &sys->state; 2549 2550 fdctrl_realize_common(fdctrl, errp); 2551 } 2552 2553 FloppyDriveType isa_fdc_get_drive_type(ISADevice *fdc, int i) 2554 { 2555 FDCtrlISABus *isa = ISA_FDC(fdc); 2556 2557 return isa->state.drives[i].drive; 2558 } 2559 2560 void isa_fdc_get_drive_max_chs(FloppyDriveType type, 2561 uint8_t *maxc, uint8_t *maxh, uint8_t *maxs) 2562 { 2563 const FDFormat *fdf; 2564 2565 *maxc = *maxh = *maxs = 0; 2566 for (fdf = fd_formats; fdf->drive != FLOPPY_DRIVE_TYPE_NONE; fdf++) { 2567 if (fdf->drive != type) { 2568 continue; 2569 } 2570 if (*maxc < fdf->max_track) { 2571 *maxc = fdf->max_track; 2572 } 2573 if (*maxh < fdf->max_head) { 2574 *maxh = fdf->max_head; 2575 } 2576 if (*maxs < fdf->last_sect) { 2577 *maxs = fdf->last_sect; 2578 } 2579 } 2580 (*maxc)--; 2581 } 2582 2583 static const VMStateDescription vmstate_isa_fdc ={ 2584 .name = "fdc", 2585 .version_id = 2, 2586 .minimum_version_id = 2, 2587 .fields = (VMStateField[]) { 2588 VMSTATE_STRUCT(state, FDCtrlISABus, 0, vmstate_fdc, FDCtrl), 2589 VMSTATE_END_OF_LIST() 2590 } 2591 }; 2592 2593 static Property isa_fdc_properties[] = { 2594 DEFINE_PROP_UINT32("iobase", FDCtrlISABus, iobase, 0x3f0), 2595 DEFINE_PROP_UINT32("irq", FDCtrlISABus, irq, 6), 2596 DEFINE_PROP_UINT32("dma", FDCtrlISABus, dma, 2), 2597 DEFINE_PROP_DRIVE("driveA", FDCtrlISABus, state.drives[0].blk), 2598 DEFINE_PROP_DRIVE("driveB", FDCtrlISABus, state.drives[1].blk), 2599 DEFINE_PROP_BIT("check_media_rate", FDCtrlISABus, state.check_media_rate, 2600 0, true), 2601 DEFINE_PROP_DEFAULT("fdtypeA", FDCtrlISABus, state.drives[0].drive, 2602 FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type, 2603 FloppyDriveType), 2604 DEFINE_PROP_DEFAULT("fdtypeB", FDCtrlISABus, state.drives[1].drive, 2605 FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type, 2606 FloppyDriveType), 2607 DEFINE_PROP_DEFAULT("fallback", FDCtrlISABus, state.fallback, 2608 FLOPPY_DRIVE_TYPE_288, qdev_prop_fdc_drive_type, 2609 FloppyDriveType), 2610 DEFINE_PROP_END_OF_LIST(), 2611 }; 2612 2613 static void isabus_fdc_class_init(ObjectClass *klass, void *data) 2614 { 2615 DeviceClass *dc = DEVICE_CLASS(klass); 2616 2617 dc->realize = isabus_fdc_realize; 2618 dc->fw_name = "fdc"; 2619 dc->reset = fdctrl_external_reset_isa; 2620 dc->vmsd = &vmstate_isa_fdc; 2621 dc->props = isa_fdc_properties; 2622 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2623 } 2624 2625 static void isabus_fdc_instance_init(Object *obj) 2626 { 2627 FDCtrlISABus *isa = ISA_FDC(obj); 2628 2629 device_add_bootindex_property(obj, &isa->bootindexA, 2630 "bootindexA", "/floppy@0", 2631 DEVICE(obj), NULL); 2632 device_add_bootindex_property(obj, &isa->bootindexB, 2633 "bootindexB", "/floppy@1", 2634 DEVICE(obj), NULL); 2635 } 2636 2637 static const TypeInfo isa_fdc_info = { 2638 .name = TYPE_ISA_FDC, 2639 .parent = TYPE_ISA_DEVICE, 2640 .instance_size = sizeof(FDCtrlISABus), 2641 .class_init = isabus_fdc_class_init, 2642 .instance_init = isabus_fdc_instance_init, 2643 }; 2644 2645 static const VMStateDescription vmstate_sysbus_fdc ={ 2646 .name = "fdc", 2647 .version_id = 2, 2648 .minimum_version_id = 2, 2649 .fields = (VMStateField[]) { 2650 VMSTATE_STRUCT(state, FDCtrlSysBus, 0, vmstate_fdc, FDCtrl), 2651 VMSTATE_END_OF_LIST() 2652 } 2653 }; 2654 2655 static Property sysbus_fdc_properties[] = { 2656 DEFINE_PROP_DRIVE("driveA", FDCtrlSysBus, state.drives[0].blk), 2657 DEFINE_PROP_DRIVE("driveB", FDCtrlSysBus, state.drives[1].blk), 2658 DEFINE_PROP_DEFAULT("fdtypeA", FDCtrlSysBus, state.drives[0].drive, 2659 FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type, 2660 FloppyDriveType), 2661 DEFINE_PROP_DEFAULT("fdtypeB", FDCtrlSysBus, state.drives[1].drive, 2662 FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type, 2663 FloppyDriveType), 2664 DEFINE_PROP_DEFAULT("fallback", FDCtrlISABus, state.fallback, 2665 FLOPPY_DRIVE_TYPE_144, qdev_prop_fdc_drive_type, 2666 FloppyDriveType), 2667 DEFINE_PROP_END_OF_LIST(), 2668 }; 2669 2670 static void sysbus_fdc_class_init(ObjectClass *klass, void *data) 2671 { 2672 DeviceClass *dc = DEVICE_CLASS(klass); 2673 2674 dc->props = sysbus_fdc_properties; 2675 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2676 } 2677 2678 static const TypeInfo sysbus_fdc_info = { 2679 .name = "sysbus-fdc", 2680 .parent = TYPE_SYSBUS_FDC, 2681 .instance_init = sysbus_fdc_initfn, 2682 .class_init = sysbus_fdc_class_init, 2683 }; 2684 2685 static Property sun4m_fdc_properties[] = { 2686 DEFINE_PROP_DRIVE("drive", FDCtrlSysBus, state.drives[0].blk), 2687 DEFINE_PROP_DEFAULT("fdtype", FDCtrlSysBus, state.drives[0].drive, 2688 FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type, 2689 FloppyDriveType), 2690 DEFINE_PROP_DEFAULT("fallback", FDCtrlISABus, state.fallback, 2691 FLOPPY_DRIVE_TYPE_144, qdev_prop_fdc_drive_type, 2692 FloppyDriveType), 2693 DEFINE_PROP_END_OF_LIST(), 2694 }; 2695 2696 static void sun4m_fdc_class_init(ObjectClass *klass, void *data) 2697 { 2698 DeviceClass *dc = DEVICE_CLASS(klass); 2699 2700 dc->props = sun4m_fdc_properties; 2701 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2702 } 2703 2704 static const TypeInfo sun4m_fdc_info = { 2705 .name = "SUNW,fdtwo", 2706 .parent = TYPE_SYSBUS_FDC, 2707 .instance_init = sun4m_fdc_initfn, 2708 .class_init = sun4m_fdc_class_init, 2709 }; 2710 2711 static void sysbus_fdc_common_class_init(ObjectClass *klass, void *data) 2712 { 2713 DeviceClass *dc = DEVICE_CLASS(klass); 2714 2715 dc->realize = sysbus_fdc_common_realize; 2716 dc->reset = fdctrl_external_reset_sysbus; 2717 dc->vmsd = &vmstate_sysbus_fdc; 2718 } 2719 2720 static const TypeInfo sysbus_fdc_type_info = { 2721 .name = TYPE_SYSBUS_FDC, 2722 .parent = TYPE_SYS_BUS_DEVICE, 2723 .instance_size = sizeof(FDCtrlSysBus), 2724 .instance_init = sysbus_fdc_common_initfn, 2725 .abstract = true, 2726 .class_init = sysbus_fdc_common_class_init, 2727 }; 2728 2729 static void fdc_register_types(void) 2730 { 2731 type_register_static(&isa_fdc_info); 2732 type_register_static(&sysbus_fdc_type_info); 2733 type_register_static(&sysbus_fdc_info); 2734 type_register_static(&sun4m_fdc_info); 2735 } 2736 2737 type_init(fdc_register_types) 2738