1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Driver for SWIM (Sander Woz Integrated Machine) floppy controller 4 * 5 * Copyright (C) 2004,2008 Laurent Vivier <Laurent@lvivier.info> 6 * 7 * based on Alastair Bridgewater SWIM analysis, 2001 8 * based on SWIM3 driver (c) Paul Mackerras, 1996 9 * based on netBSD IWM driver (c) 1997, 1998 Hauke Fath. 10 * 11 * 2004-08-21 (lv) - Initial implementation 12 * 2008-10-30 (lv) - Port to 2.6 13 */ 14 15 #include <linux/module.h> 16 #include <linux/fd.h> 17 #include <linux/slab.h> 18 #include <linux/blk-mq.h> 19 #include <linux/major.h> 20 #include <linux/mutex.h> 21 #include <linux/hdreg.h> 22 #include <linux/kernel.h> 23 #include <linux/delay.h> 24 #include <linux/platform_device.h> 25 26 #include <asm/mac_via.h> 27 28 #define CARDNAME "swim" 29 30 struct sector_header { 31 unsigned char side; 32 unsigned char track; 33 unsigned char sector; 34 unsigned char size; 35 unsigned char crc0; 36 unsigned char crc1; 37 } __attribute__((packed)); 38 39 #define DRIVER_VERSION "Version 0.2 (2008-10-30)" 40 41 #define REG(x) unsigned char x, x ## _pad[0x200 - 1]; 42 43 struct swim { 44 REG(write_data) 45 REG(write_mark) 46 REG(write_CRC) 47 REG(write_parameter) 48 REG(write_phase) 49 REG(write_setup) 50 REG(write_mode0) 51 REG(write_mode1) 52 53 REG(read_data) 54 REG(read_mark) 55 REG(read_error) 56 REG(read_parameter) 57 REG(read_phase) 58 REG(read_setup) 59 REG(read_status) 60 REG(read_handshake) 61 } __attribute__((packed)); 62 63 #define swim_write(base, reg, v) out_8(&(base)->write_##reg, (v)) 64 #define swim_read(base, reg) in_8(&(base)->read_##reg) 65 66 /* IWM registers */ 67 68 struct iwm { 69 REG(ph0L) 70 REG(ph0H) 71 REG(ph1L) 72 REG(ph1H) 73 REG(ph2L) 74 REG(ph2H) 75 REG(ph3L) 76 REG(ph3H) 77 REG(mtrOff) 78 REG(mtrOn) 79 REG(intDrive) 80 REG(extDrive) 81 REG(q6L) 82 REG(q6H) 83 REG(q7L) 84 REG(q7H) 85 } __attribute__((packed)); 86 87 #define iwm_write(base, reg, v) out_8(&(base)->reg, (v)) 88 #define iwm_read(base, reg) in_8(&(base)->reg) 89 90 /* bits in phase register */ 91 92 #define SEEK_POSITIVE 0x070 93 #define SEEK_NEGATIVE 0x074 94 #define STEP 0x071 95 #define MOTOR_ON 0x072 96 #define MOTOR_OFF 0x076 97 #define INDEX 0x073 98 #define EJECT 0x077 99 #define SETMFM 0x171 100 #define SETGCR 0x175 101 102 #define RELAX 0x033 103 #define LSTRB 0x008 104 105 #define CA_MASK 0x077 106 107 /* Select values for swim_select and swim_readbit */ 108 109 #define READ_DATA_0 0x074 110 #define ONEMEG_DRIVE 0x075 111 #define SINGLE_SIDED 0x076 112 #define DRIVE_PRESENT 0x077 113 #define DISK_IN 0x170 114 #define WRITE_PROT 0x171 115 #define TRACK_ZERO 0x172 116 #define TACHO 0x173 117 #define READ_DATA_1 0x174 118 #define GCR_MODE 0x175 119 #define SEEK_COMPLETE 0x176 120 #define TWOMEG_MEDIA 0x177 121 122 /* Bits in handshake register */ 123 124 #define MARK_BYTE 0x01 125 #define CRC_ZERO 0x02 126 #define RDDATA 0x04 127 #define SENSE 0x08 128 #define MOTEN 0x10 129 #define ERROR 0x20 130 #define DAT2BYTE 0x40 131 #define DAT1BYTE 0x80 132 133 /* bits in setup register */ 134 135 #define S_INV_WDATA 0x01 136 #define S_3_5_SELECT 0x02 137 #define S_GCR 0x04 138 #define S_FCLK_DIV2 0x08 139 #define S_ERROR_CORR 0x10 140 #define S_IBM_DRIVE 0x20 141 #define S_GCR_WRITE 0x40 142 #define S_TIMEOUT 0x80 143 144 /* bits in mode register */ 145 146 #define CLFIFO 0x01 147 #define ENBL1 0x02 148 #define ENBL2 0x04 149 #define ACTION 0x08 150 #define WRITE_MODE 0x10 151 #define HEDSEL 0x20 152 #define MOTON 0x80 153 154 /*----------------------------------------------------------------------------*/ 155 156 enum drive_location { 157 INTERNAL_DRIVE = 0x02, 158 EXTERNAL_DRIVE = 0x04, 159 }; 160 161 enum media_type { 162 DD_MEDIA, 163 HD_MEDIA, 164 }; 165 166 struct floppy_state { 167 168 /* physical properties */ 169 170 enum drive_location location; /* internal or external drive */ 171 int head_number; /* single- or double-sided drive */ 172 173 /* media */ 174 175 int disk_in; 176 int ejected; 177 enum media_type type; 178 int write_protected; 179 180 int total_secs; 181 int secpercyl; 182 int secpertrack; 183 184 /* in-use information */ 185 186 int track; 187 int ref_count; 188 bool registered; 189 190 struct gendisk *disk; 191 struct blk_mq_tag_set tag_set; 192 193 /* parent controller */ 194 195 struct swim_priv *swd; 196 }; 197 198 enum motor_action { 199 OFF, 200 ON, 201 }; 202 203 enum head { 204 LOWER_HEAD = 0, 205 UPPER_HEAD = 1, 206 }; 207 208 #define FD_MAX_UNIT 2 209 210 struct swim_priv { 211 struct swim __iomem *base; 212 spinlock_t lock; 213 int floppy_count; 214 struct floppy_state unit[FD_MAX_UNIT]; 215 }; 216 217 extern int swim_read_sector_header(struct swim __iomem *base, 218 struct sector_header *header); 219 extern int swim_read_sector_data(struct swim __iomem *base, 220 unsigned char *data); 221 222 static DEFINE_MUTEX(swim_mutex); 223 static inline void set_swim_mode(struct swim __iomem *base, int enable) 224 { 225 struct iwm __iomem *iwm_base; 226 unsigned long flags; 227 228 if (!enable) { 229 swim_write(base, mode0, 0xf8); 230 return; 231 } 232 233 iwm_base = (struct iwm __iomem *)base; 234 local_irq_save(flags); 235 236 iwm_read(iwm_base, q7L); 237 iwm_read(iwm_base, mtrOff); 238 iwm_read(iwm_base, q6H); 239 240 iwm_write(iwm_base, q7H, 0x57); 241 iwm_write(iwm_base, q7H, 0x17); 242 iwm_write(iwm_base, q7H, 0x57); 243 iwm_write(iwm_base, q7H, 0x57); 244 245 local_irq_restore(flags); 246 } 247 248 static inline int get_swim_mode(struct swim __iomem *base) 249 { 250 unsigned long flags; 251 252 local_irq_save(flags); 253 254 swim_write(base, phase, 0xf5); 255 if (swim_read(base, phase) != 0xf5) 256 goto is_iwm; 257 swim_write(base, phase, 0xf6); 258 if (swim_read(base, phase) != 0xf6) 259 goto is_iwm; 260 swim_write(base, phase, 0xf7); 261 if (swim_read(base, phase) != 0xf7) 262 goto is_iwm; 263 local_irq_restore(flags); 264 return 1; 265 is_iwm: 266 local_irq_restore(flags); 267 return 0; 268 } 269 270 static inline void swim_select(struct swim __iomem *base, int sel) 271 { 272 swim_write(base, phase, RELAX); 273 274 via1_set_head(sel & 0x100); 275 276 swim_write(base, phase, sel & CA_MASK); 277 } 278 279 static inline void swim_action(struct swim __iomem *base, int action) 280 { 281 unsigned long flags; 282 283 local_irq_save(flags); 284 285 swim_select(base, action); 286 udelay(1); 287 swim_write(base, phase, (LSTRB<<4) | LSTRB); 288 udelay(1); 289 swim_write(base, phase, (LSTRB<<4) | ((~LSTRB) & 0x0F)); 290 udelay(1); 291 292 local_irq_restore(flags); 293 } 294 295 static inline int swim_readbit(struct swim __iomem *base, int bit) 296 { 297 int stat; 298 299 swim_select(base, bit); 300 301 udelay(10); 302 303 stat = swim_read(base, handshake); 304 305 return (stat & SENSE) == 0; 306 } 307 308 static inline void swim_drive(struct swim __iomem *base, 309 enum drive_location location) 310 { 311 if (location == INTERNAL_DRIVE) { 312 swim_write(base, mode0, EXTERNAL_DRIVE); /* clear drive 1 bit */ 313 swim_write(base, mode1, INTERNAL_DRIVE); /* set drive 0 bit */ 314 } else if (location == EXTERNAL_DRIVE) { 315 swim_write(base, mode0, INTERNAL_DRIVE); /* clear drive 0 bit */ 316 swim_write(base, mode1, EXTERNAL_DRIVE); /* set drive 1 bit */ 317 } 318 } 319 320 static inline void swim_motor(struct swim __iomem *base, 321 enum motor_action action) 322 { 323 if (action == ON) { 324 int i; 325 326 swim_action(base, MOTOR_ON); 327 328 for (i = 0; i < 2*HZ; i++) { 329 swim_select(base, RELAX); 330 if (swim_readbit(base, MOTOR_ON)) 331 break; 332 set_current_state(TASK_INTERRUPTIBLE); 333 schedule_timeout(1); 334 } 335 } else if (action == OFF) { 336 swim_action(base, MOTOR_OFF); 337 swim_select(base, RELAX); 338 } 339 } 340 341 static inline void swim_eject(struct swim __iomem *base) 342 { 343 int i; 344 345 swim_action(base, EJECT); 346 347 for (i = 0; i < 2*HZ; i++) { 348 swim_select(base, RELAX); 349 if (!swim_readbit(base, DISK_IN)) 350 break; 351 set_current_state(TASK_INTERRUPTIBLE); 352 schedule_timeout(1); 353 } 354 swim_select(base, RELAX); 355 } 356 357 static inline void swim_head(struct swim __iomem *base, enum head head) 358 { 359 /* wait drive is ready */ 360 361 if (head == UPPER_HEAD) 362 swim_select(base, READ_DATA_1); 363 else if (head == LOWER_HEAD) 364 swim_select(base, READ_DATA_0); 365 } 366 367 static inline int swim_step(struct swim __iomem *base) 368 { 369 int wait; 370 371 swim_action(base, STEP); 372 373 for (wait = 0; wait < HZ; wait++) { 374 375 set_current_state(TASK_INTERRUPTIBLE); 376 schedule_timeout(1); 377 378 swim_select(base, RELAX); 379 if (!swim_readbit(base, STEP)) 380 return 0; 381 } 382 return -1; 383 } 384 385 static inline int swim_track00(struct swim __iomem *base) 386 { 387 int try; 388 389 swim_action(base, SEEK_NEGATIVE); 390 391 for (try = 0; try < 100; try++) { 392 393 swim_select(base, RELAX); 394 if (swim_readbit(base, TRACK_ZERO)) 395 break; 396 397 if (swim_step(base)) 398 return -1; 399 } 400 401 if (swim_readbit(base, TRACK_ZERO)) 402 return 0; 403 404 return -1; 405 } 406 407 static inline int swim_seek(struct swim __iomem *base, int step) 408 { 409 if (step == 0) 410 return 0; 411 412 if (step < 0) { 413 swim_action(base, SEEK_NEGATIVE); 414 step = -step; 415 } else 416 swim_action(base, SEEK_POSITIVE); 417 418 for ( ; step > 0; step--) { 419 if (swim_step(base)) 420 return -1; 421 } 422 423 return 0; 424 } 425 426 static inline int swim_track(struct floppy_state *fs, int track) 427 { 428 struct swim __iomem *base = fs->swd->base; 429 int ret; 430 431 ret = swim_seek(base, track - fs->track); 432 433 if (ret == 0) 434 fs->track = track; 435 else { 436 swim_track00(base); 437 fs->track = 0; 438 } 439 440 return ret; 441 } 442 443 static int floppy_eject(struct floppy_state *fs) 444 { 445 struct swim __iomem *base = fs->swd->base; 446 447 swim_drive(base, fs->location); 448 swim_motor(base, OFF); 449 swim_eject(base); 450 451 fs->disk_in = 0; 452 fs->ejected = 1; 453 454 return 0; 455 } 456 457 static inline int swim_read_sector(struct floppy_state *fs, 458 int side, int track, 459 int sector, unsigned char *buffer) 460 { 461 struct swim __iomem *base = fs->swd->base; 462 unsigned long flags; 463 struct sector_header header; 464 int ret = -1; 465 short i; 466 467 swim_track(fs, track); 468 469 swim_write(base, mode1, MOTON); 470 swim_head(base, side); 471 swim_write(base, mode0, side); 472 473 local_irq_save(flags); 474 for (i = 0; i < 36; i++) { 475 ret = swim_read_sector_header(base, &header); 476 if (!ret && (header.sector == sector)) { 477 /* found */ 478 479 ret = swim_read_sector_data(base, buffer); 480 break; 481 } 482 } 483 local_irq_restore(flags); 484 485 swim_write(base, mode0, MOTON); 486 487 if ((header.side != side) || (header.track != track) || 488 (header.sector != sector)) 489 return 0; 490 491 return ret; 492 } 493 494 static blk_status_t floppy_read_sectors(struct floppy_state *fs, 495 int req_sector, int sectors_nb, 496 unsigned char *buffer) 497 { 498 struct swim __iomem *base = fs->swd->base; 499 int ret; 500 int side, track, sector; 501 int i, try; 502 503 504 swim_drive(base, fs->location); 505 for (i = req_sector; i < req_sector + sectors_nb; i++) { 506 int x; 507 track = i / fs->secpercyl; 508 x = i % fs->secpercyl; 509 side = x / fs->secpertrack; 510 sector = x % fs->secpertrack + 1; 511 512 try = 5; 513 do { 514 ret = swim_read_sector(fs, side, track, sector, 515 buffer); 516 if (try-- == 0) 517 return BLK_STS_IOERR; 518 } while (ret != 512); 519 520 buffer += ret; 521 } 522 523 return 0; 524 } 525 526 static blk_status_t swim_queue_rq(struct blk_mq_hw_ctx *hctx, 527 const struct blk_mq_queue_data *bd) 528 { 529 struct floppy_state *fs = hctx->queue->queuedata; 530 struct swim_priv *swd = fs->swd; 531 struct request *req = bd->rq; 532 blk_status_t err; 533 534 if (!spin_trylock_irq(&swd->lock)) 535 return BLK_STS_DEV_RESOURCE; 536 537 blk_mq_start_request(req); 538 539 if (!fs->disk_in || rq_data_dir(req) == WRITE) { 540 err = BLK_STS_IOERR; 541 goto out; 542 } 543 544 do { 545 err = floppy_read_sectors(fs, blk_rq_pos(req), 546 blk_rq_cur_sectors(req), 547 bio_data(req->bio)); 548 } while (blk_update_request(req, err, blk_rq_cur_bytes(req))); 549 __blk_mq_end_request(req, err); 550 551 err = BLK_STS_OK; 552 out: 553 spin_unlock_irq(&swd->lock); 554 return err; 555 556 } 557 558 static struct floppy_struct floppy_type[4] = { 559 { 0, 0, 0, 0, 0, 0x00, 0x00, 0x00, 0x00, NULL }, /* no testing */ 560 { 720, 9, 1, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 360KB SS 3.5"*/ 561 { 1440, 9, 2, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 720KB 3.5" */ 562 { 2880, 18, 2, 80, 0, 0x1B, 0x00, 0xCF, 0x6C, NULL }, /* 1.44MB 3.5" */ 563 }; 564 565 static int get_floppy_geometry(struct floppy_state *fs, int type, 566 struct floppy_struct **g) 567 { 568 if (type >= ARRAY_SIZE(floppy_type)) 569 return -EINVAL; 570 571 if (type) 572 *g = &floppy_type[type]; 573 else if (fs->type == HD_MEDIA) /* High-Density media */ 574 *g = &floppy_type[3]; 575 else if (fs->head_number == 2) /* double-sided */ 576 *g = &floppy_type[2]; 577 else 578 *g = &floppy_type[1]; 579 580 return 0; 581 } 582 583 static void setup_medium(struct floppy_state *fs) 584 { 585 struct swim __iomem *base = fs->swd->base; 586 587 if (swim_readbit(base, DISK_IN)) { 588 struct floppy_struct *g; 589 fs->disk_in = 1; 590 fs->write_protected = swim_readbit(base, WRITE_PROT); 591 592 if (swim_track00(base)) 593 printk(KERN_ERR 594 "SWIM: cannot move floppy head to track 0\n"); 595 596 swim_track00(base); 597 598 fs->type = swim_readbit(base, TWOMEG_MEDIA) ? 599 HD_MEDIA : DD_MEDIA; 600 fs->head_number = swim_readbit(base, SINGLE_SIDED) ? 1 : 2; 601 get_floppy_geometry(fs, 0, &g); 602 fs->total_secs = g->size; 603 fs->secpercyl = g->head * g->sect; 604 fs->secpertrack = g->sect; 605 fs->track = 0; 606 } else { 607 fs->disk_in = 0; 608 } 609 } 610 611 static int floppy_open(struct block_device *bdev, fmode_t mode) 612 { 613 struct floppy_state *fs = bdev->bd_disk->private_data; 614 struct swim __iomem *base = fs->swd->base; 615 int err; 616 617 if (fs->ref_count == -1 || (fs->ref_count && mode & FMODE_EXCL)) 618 return -EBUSY; 619 620 if (mode & FMODE_EXCL) 621 fs->ref_count = -1; 622 else 623 fs->ref_count++; 624 625 swim_write(base, setup, S_IBM_DRIVE | S_FCLK_DIV2); 626 udelay(10); 627 swim_drive(base, fs->location); 628 swim_motor(base, ON); 629 swim_action(base, SETMFM); 630 if (fs->ejected) 631 setup_medium(fs); 632 if (!fs->disk_in) { 633 err = -ENXIO; 634 goto out; 635 } 636 637 set_capacity(fs->disk, fs->total_secs); 638 639 if (mode & FMODE_NDELAY) 640 return 0; 641 642 if (mode & (FMODE_READ|FMODE_WRITE)) { 643 if (bdev_check_media_change(bdev) && fs->disk_in) 644 fs->ejected = 0; 645 if ((mode & FMODE_WRITE) && fs->write_protected) { 646 err = -EROFS; 647 goto out; 648 } 649 } 650 return 0; 651 out: 652 if (fs->ref_count < 0) 653 fs->ref_count = 0; 654 else if (fs->ref_count > 0) 655 --fs->ref_count; 656 657 if (fs->ref_count == 0) 658 swim_motor(base, OFF); 659 return err; 660 } 661 662 static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode) 663 { 664 int ret; 665 666 mutex_lock(&swim_mutex); 667 ret = floppy_open(bdev, mode); 668 mutex_unlock(&swim_mutex); 669 670 return ret; 671 } 672 673 static void floppy_release(struct gendisk *disk, fmode_t mode) 674 { 675 struct floppy_state *fs = disk->private_data; 676 struct swim __iomem *base = fs->swd->base; 677 678 mutex_lock(&swim_mutex); 679 if (fs->ref_count < 0) 680 fs->ref_count = 0; 681 else if (fs->ref_count > 0) 682 --fs->ref_count; 683 684 if (fs->ref_count == 0) 685 swim_motor(base, OFF); 686 mutex_unlock(&swim_mutex); 687 } 688 689 static int floppy_ioctl(struct block_device *bdev, fmode_t mode, 690 unsigned int cmd, unsigned long param) 691 { 692 struct floppy_state *fs = bdev->bd_disk->private_data; 693 int err; 694 695 if ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)) 696 return -EPERM; 697 698 switch (cmd) { 699 case FDEJECT: 700 if (fs->ref_count != 1) 701 return -EBUSY; 702 mutex_lock(&swim_mutex); 703 err = floppy_eject(fs); 704 mutex_unlock(&swim_mutex); 705 return err; 706 707 case FDGETPRM: 708 if (copy_to_user((void __user *) param, (void *) &floppy_type, 709 sizeof(struct floppy_struct))) 710 return -EFAULT; 711 return 0; 712 } 713 return -ENOTTY; 714 } 715 716 static int floppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) 717 { 718 struct floppy_state *fs = bdev->bd_disk->private_data; 719 struct floppy_struct *g; 720 int ret; 721 722 ret = get_floppy_geometry(fs, 0, &g); 723 if (ret) 724 return ret; 725 726 geo->heads = g->head; 727 geo->sectors = g->sect; 728 geo->cylinders = g->track; 729 730 return 0; 731 } 732 733 static unsigned int floppy_check_events(struct gendisk *disk, 734 unsigned int clearing) 735 { 736 struct floppy_state *fs = disk->private_data; 737 738 return fs->ejected ? DISK_EVENT_MEDIA_CHANGE : 0; 739 } 740 741 static const struct block_device_operations floppy_fops = { 742 .owner = THIS_MODULE, 743 .open = floppy_unlocked_open, 744 .release = floppy_release, 745 .ioctl = floppy_ioctl, 746 .getgeo = floppy_getgeo, 747 .check_events = floppy_check_events, 748 }; 749 750 static int swim_add_floppy(struct swim_priv *swd, enum drive_location location) 751 { 752 struct floppy_state *fs = &swd->unit[swd->floppy_count]; 753 struct swim __iomem *base = swd->base; 754 755 fs->location = location; 756 757 swim_drive(base, location); 758 759 swim_motor(base, OFF); 760 761 fs->type = HD_MEDIA; 762 fs->head_number = 2; 763 764 fs->ref_count = 0; 765 fs->ejected = 1; 766 767 swd->floppy_count++; 768 769 return 0; 770 } 771 772 static const struct blk_mq_ops swim_mq_ops = { 773 .queue_rq = swim_queue_rq, 774 }; 775 776 static void swim_cleanup_floppy_disk(struct floppy_state *fs) 777 { 778 struct gendisk *disk = fs->disk; 779 780 if (!disk) 781 return; 782 783 if (fs->registered) 784 del_gendisk(fs->disk); 785 786 blk_cleanup_disk(disk); 787 blk_mq_free_tag_set(&fs->tag_set); 788 } 789 790 static int swim_floppy_init(struct swim_priv *swd) 791 { 792 int err; 793 int drive; 794 struct swim __iomem *base = swd->base; 795 796 /* scan floppy drives */ 797 798 swim_drive(base, INTERNAL_DRIVE); 799 if (swim_readbit(base, DRIVE_PRESENT) && 800 !swim_readbit(base, ONEMEG_DRIVE)) 801 swim_add_floppy(swd, INTERNAL_DRIVE); 802 swim_drive(base, EXTERNAL_DRIVE); 803 if (swim_readbit(base, DRIVE_PRESENT) && 804 !swim_readbit(base, ONEMEG_DRIVE)) 805 swim_add_floppy(swd, EXTERNAL_DRIVE); 806 807 /* register floppy drives */ 808 809 err = register_blkdev(FLOPPY_MAJOR, "fd"); 810 if (err) { 811 printk(KERN_ERR "Unable to get major %d for SWIM floppy\n", 812 FLOPPY_MAJOR); 813 return -EBUSY; 814 } 815 816 spin_lock_init(&swd->lock); 817 818 for (drive = 0; drive < swd->floppy_count; drive++) { 819 err = blk_mq_alloc_sq_tag_set(&swd->unit[drive].tag_set, 820 &swim_mq_ops, 2, BLK_MQ_F_SHOULD_MERGE); 821 if (err) 822 goto exit_put_disks; 823 824 swd->unit[drive].disk = 825 blk_mq_alloc_disk(&swd->unit[drive].tag_set, 826 &swd->unit[drive]); 827 if (IS_ERR(swd->unit[drive].disk)) { 828 blk_mq_free_tag_set(&swd->unit[drive].tag_set); 829 err = PTR_ERR(swd->unit[drive].disk); 830 goto exit_put_disks; 831 } 832 833 swd->unit[drive].swd = swd; 834 } 835 836 for (drive = 0; drive < swd->floppy_count; drive++) { 837 swd->unit[drive].disk->flags = GENHD_FL_REMOVABLE; 838 swd->unit[drive].disk->major = FLOPPY_MAJOR; 839 swd->unit[drive].disk->first_minor = drive; 840 swd->unit[drive].disk->minors = 1; 841 sprintf(swd->unit[drive].disk->disk_name, "fd%d", drive); 842 swd->unit[drive].disk->fops = &floppy_fops; 843 swd->unit[drive].disk->flags |= GENHD_FL_NO_PART; 844 swd->unit[drive].disk->events = DISK_EVENT_MEDIA_CHANGE; 845 swd->unit[drive].disk->private_data = &swd->unit[drive]; 846 set_capacity(swd->unit[drive].disk, 2880); 847 err = add_disk(swd->unit[drive].disk); 848 if (err) 849 goto exit_put_disks; 850 swd->unit[drive].registered = true; 851 } 852 853 return 0; 854 855 exit_put_disks: 856 unregister_blkdev(FLOPPY_MAJOR, "fd"); 857 do { 858 swim_cleanup_floppy_disk(&swd->unit[drive]); 859 } while (drive--); 860 return err; 861 } 862 863 static int swim_probe(struct platform_device *dev) 864 { 865 struct resource *res; 866 struct swim __iomem *swim_base; 867 struct swim_priv *swd; 868 int ret; 869 870 res = platform_get_resource(dev, IORESOURCE_MEM, 0); 871 if (!res) { 872 ret = -ENODEV; 873 goto out; 874 } 875 876 if (!request_mem_region(res->start, resource_size(res), CARDNAME)) { 877 ret = -EBUSY; 878 goto out; 879 } 880 881 swim_base = (struct swim __iomem *)res->start; 882 if (!swim_base) { 883 ret = -ENOMEM; 884 goto out_release_io; 885 } 886 887 /* probe device */ 888 889 set_swim_mode(swim_base, 1); 890 if (!get_swim_mode(swim_base)) { 891 printk(KERN_INFO "SWIM device not found !\n"); 892 ret = -ENODEV; 893 goto out_release_io; 894 } 895 896 /* set platform driver data */ 897 898 swd = kzalloc(sizeof(struct swim_priv), GFP_KERNEL); 899 if (!swd) { 900 ret = -ENOMEM; 901 goto out_release_io; 902 } 903 platform_set_drvdata(dev, swd); 904 905 swd->base = swim_base; 906 907 ret = swim_floppy_init(swd); 908 if (ret) 909 goto out_kfree; 910 911 return 0; 912 913 out_kfree: 914 kfree(swd); 915 out_release_io: 916 release_mem_region(res->start, resource_size(res)); 917 out: 918 return ret; 919 } 920 921 static int swim_remove(struct platform_device *dev) 922 { 923 struct swim_priv *swd = platform_get_drvdata(dev); 924 int drive; 925 struct resource *res; 926 927 for (drive = 0; drive < swd->floppy_count; drive++) 928 swim_cleanup_floppy_disk(&swd->unit[drive]); 929 930 unregister_blkdev(FLOPPY_MAJOR, "fd"); 931 932 /* eject floppies */ 933 934 for (drive = 0; drive < swd->floppy_count; drive++) 935 floppy_eject(&swd->unit[drive]); 936 937 res = platform_get_resource(dev, IORESOURCE_MEM, 0); 938 if (res) 939 release_mem_region(res->start, resource_size(res)); 940 941 kfree(swd); 942 943 return 0; 944 } 945 946 static struct platform_driver swim_driver = { 947 .probe = swim_probe, 948 .remove = swim_remove, 949 .driver = { 950 .name = CARDNAME, 951 }, 952 }; 953 954 static int __init swim_init(void) 955 { 956 printk(KERN_INFO "SWIM floppy driver %s\n", DRIVER_VERSION); 957 958 return platform_driver_register(&swim_driver); 959 } 960 module_init(swim_init); 961 962 static void __exit swim_exit(void) 963 { 964 platform_driver_unregister(&swim_driver); 965 } 966 module_exit(swim_exit); 967 968 MODULE_DESCRIPTION("Driver for SWIM floppy controller"); 969 MODULE_LICENSE("GPL"); 970 MODULE_AUTHOR("Laurent Vivier <laurent@lvivier.info>"); 971 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); 972