1 /* 2 * Driver for SWIM (Sander Woz Integrated Machine) floppy controller 3 * 4 * Copyright (C) 2004,2008 Laurent Vivier <Laurent@lvivier.info> 5 * 6 * based on Alastair Bridgewater SWIM analysis, 2001 7 * based on SWIM3 driver (c) Paul Mackerras, 1996 8 * based on netBSD IWM driver (c) 1997, 1998 Hauke Fath. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License 12 * as published by the Free Software Foundation; either version 13 * 2 of the License, or (at your option) any later version. 14 * 15 * 2004-08-21 (lv) - Initial implementation 16 * 2008-10-30 (lv) - Port to 2.6 17 */ 18 19 #include <linux/module.h> 20 #include <linux/fd.h> 21 #include <linux/blkdev.h> 22 #include <linux/hdreg.h> 23 #include <linux/kernel.h> 24 #include <linux/delay.h> 25 #include <linux/platform_device.h> 26 27 #include <asm/macintosh.h> 28 #include <asm/mac_via.h> 29 30 #define CARDNAME "swim" 31 32 struct sector_header { 33 unsigned char side; 34 unsigned char track; 35 unsigned char sector; 36 unsigned char size; 37 unsigned char crc0; 38 unsigned char crc1; 39 } __attribute__((packed)); 40 41 #define DRIVER_VERSION "Version 0.2 (2008-10-30)" 42 43 #define REG(x) unsigned char x, x ## _pad[0x200 - 1]; 44 45 struct swim { 46 REG(write_data) 47 REG(write_mark) 48 REG(write_CRC) 49 REG(write_parameter) 50 REG(write_phase) 51 REG(write_setup) 52 REG(write_mode0) 53 REG(write_mode1) 54 55 REG(read_data) 56 REG(read_mark) 57 REG(read_error) 58 REG(read_parameter) 59 REG(read_phase) 60 REG(read_setup) 61 REG(read_status) 62 REG(read_handshake) 63 } __attribute__((packed)); 64 65 #define swim_write(base, reg, v) out_8(&(base)->write_##reg, (v)) 66 #define swim_read(base, reg) in_8(&(base)->read_##reg) 67 68 /* IWM registers */ 69 70 struct iwm { 71 REG(ph0L) 72 REG(ph0H) 73 REG(ph1L) 74 REG(ph1H) 75 REG(ph2L) 76 REG(ph2H) 77 REG(ph3L) 78 REG(ph3H) 79 REG(mtrOff) 80 REG(mtrOn) 81 REG(intDrive) 82 REG(extDrive) 83 REG(q6L) 84 REG(q6H) 85 REG(q7L) 86 REG(q7H) 87 } __attribute__((packed)); 88 89 #define iwm_write(base, reg, v) out_8(&(base)->reg, (v)) 90 #define iwm_read(base, reg) in_8(&(base)->reg) 91 92 /* bits in phase register */ 93 94 #define SEEK_POSITIVE 0x070 95 #define SEEK_NEGATIVE 0x074 96 #define STEP 0x071 97 #define MOTOR_ON 0x072 98 #define MOTOR_OFF 0x076 99 #define INDEX 0x073 100 #define EJECT 0x077 101 #define SETMFM 0x171 102 #define SETGCR 0x175 103 104 #define RELAX 0x033 105 #define LSTRB 0x008 106 107 #define CA_MASK 0x077 108 109 /* Select values for swim_select and swim_readbit */ 110 111 #define READ_DATA_0 0x074 112 #define TWOMEG_DRIVE 0x075 113 #define SINGLE_SIDED 0x076 114 #define DRIVE_PRESENT 0x077 115 #define DISK_IN 0x170 116 #define WRITE_PROT 0x171 117 #define TRACK_ZERO 0x172 118 #define TACHO 0x173 119 #define READ_DATA_1 0x174 120 #define MFM_MODE 0x175 121 #define SEEK_COMPLETE 0x176 122 #define ONEMEG_MEDIA 0x177 123 124 /* Bits in handshake register */ 125 126 #define MARK_BYTE 0x01 127 #define CRC_ZERO 0x02 128 #define RDDATA 0x04 129 #define SENSE 0x08 130 #define MOTEN 0x10 131 #define ERROR 0x20 132 #define DAT2BYTE 0x40 133 #define DAT1BYTE 0x80 134 135 /* bits in setup register */ 136 137 #define S_INV_WDATA 0x01 138 #define S_3_5_SELECT 0x02 139 #define S_GCR 0x04 140 #define S_FCLK_DIV2 0x08 141 #define S_ERROR_CORR 0x10 142 #define S_IBM_DRIVE 0x20 143 #define S_GCR_WRITE 0x40 144 #define S_TIMEOUT 0x80 145 146 /* bits in mode register */ 147 148 #define CLFIFO 0x01 149 #define ENBL1 0x02 150 #define ENBL2 0x04 151 #define ACTION 0x08 152 #define WRITE_MODE 0x10 153 #define HEDSEL 0x20 154 #define MOTON 0x80 155 156 /*----------------------------------------------------------------------------*/ 157 158 enum drive_location { 159 INTERNAL_DRIVE = 0x02, 160 EXTERNAL_DRIVE = 0x04, 161 }; 162 163 enum media_type { 164 DD_MEDIA, 165 HD_MEDIA, 166 }; 167 168 struct floppy_state { 169 170 /* physical properties */ 171 172 enum drive_location location; /* internal or external drive */ 173 int head_number; /* single- or double-sided drive */ 174 175 /* media */ 176 177 int disk_in; 178 int ejected; 179 enum media_type type; 180 int write_protected; 181 182 int total_secs; 183 int secpercyl; 184 int secpertrack; 185 186 /* in-use information */ 187 188 int track; 189 int ref_count; 190 191 struct gendisk *disk; 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 struct request_queue *queue; 214 int floppy_count; 215 struct floppy_state unit[FD_MAX_UNIT]; 216 }; 217 218 extern int swim_read_sector_header(struct swim __iomem *base, 219 struct sector_header *header); 220 extern int swim_read_sector_data(struct swim __iomem *base, 221 unsigned char *data); 222 223 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 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 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 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 int 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 -EIO; 518 } while (ret != 512); 519 520 buffer += ret; 521 } 522 523 return 0; 524 } 525 526 static void redo_fd_request(struct request_queue *q) 527 { 528 struct request *req; 529 struct floppy_state *fs; 530 531 req = blk_fetch_request(q); 532 while (req) { 533 int err = -EIO; 534 535 fs = req->rq_disk->private_data; 536 if (blk_rq_pos(req) >= fs->total_secs) 537 goto done; 538 if (!fs->disk_in) 539 goto done; 540 if (rq_data_dir(req) == WRITE && fs->write_protected) 541 goto done; 542 543 switch (rq_data_dir(req)) { 544 case WRITE: 545 /* NOT IMPLEMENTED */ 546 break; 547 case READ: 548 err = floppy_read_sectors(fs, blk_rq_pos(req), 549 blk_rq_cur_sectors(req), 550 req->buffer); 551 break; 552 } 553 done: 554 if (!__blk_end_request_cur(req, err)) 555 req = blk_fetch_request(q); 556 } 557 } 558 559 static void do_fd_request(struct request_queue *q) 560 { 561 redo_fd_request(q); 562 } 563 564 static struct floppy_struct floppy_type[4] = { 565 { 0, 0, 0, 0, 0, 0x00, 0x00, 0x00, 0x00, NULL }, /* no testing */ 566 { 720, 9, 1, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 360KB SS 3.5"*/ 567 { 1440, 9, 2, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 720KB 3.5" */ 568 { 2880, 18, 2, 80, 0, 0x1B, 0x00, 0xCF, 0x6C, NULL }, /* 1.44MB 3.5" */ 569 }; 570 571 static int get_floppy_geometry(struct floppy_state *fs, int type, 572 struct floppy_struct **g) 573 { 574 if (type >= ARRAY_SIZE(floppy_type)) 575 return -EINVAL; 576 577 if (type) 578 *g = &floppy_type[type]; 579 else if (fs->type == HD_MEDIA) /* High-Density media */ 580 *g = &floppy_type[3]; 581 else if (fs->head_number == 2) /* double-sided */ 582 *g = &floppy_type[2]; 583 else 584 *g = &floppy_type[1]; 585 586 return 0; 587 } 588 589 static void setup_medium(struct floppy_state *fs) 590 { 591 struct swim __iomem *base = fs->swd->base; 592 593 if (swim_readbit(base, DISK_IN)) { 594 struct floppy_struct *g; 595 fs->disk_in = 1; 596 fs->write_protected = swim_readbit(base, WRITE_PROT); 597 fs->type = swim_readbit(base, ONEMEG_MEDIA); 598 599 if (swim_track00(base)) 600 printk(KERN_ERR 601 "SWIM: cannot move floppy head to track 0\n"); 602 603 swim_track00(base); 604 605 get_floppy_geometry(fs, 0, &g); 606 fs->total_secs = g->size; 607 fs->secpercyl = g->head * g->sect; 608 fs->secpertrack = g->sect; 609 fs->track = 0; 610 } else { 611 fs->disk_in = 0; 612 } 613 } 614 615 static int floppy_open(struct block_device *bdev, fmode_t mode) 616 { 617 struct floppy_state *fs = bdev->bd_disk->private_data; 618 struct swim __iomem *base = fs->swd->base; 619 int err; 620 621 if (fs->ref_count == -1 || (fs->ref_count && mode & FMODE_EXCL)) 622 return -EBUSY; 623 624 if (mode & FMODE_EXCL) 625 fs->ref_count = -1; 626 else 627 fs->ref_count++; 628 629 swim_write(base, setup, S_IBM_DRIVE | S_FCLK_DIV2); 630 udelay(10); 631 swim_drive(base, INTERNAL_DRIVE); 632 swim_motor(base, ON); 633 swim_action(base, SETMFM); 634 if (fs->ejected) 635 setup_medium(fs); 636 if (!fs->disk_in) { 637 err = -ENXIO; 638 goto out; 639 } 640 641 if (mode & FMODE_NDELAY) 642 return 0; 643 644 if (mode & (FMODE_READ|FMODE_WRITE)) { 645 check_disk_change(bdev); 646 if ((mode & FMODE_WRITE) && fs->write_protected) { 647 err = -EROFS; 648 goto out; 649 } 650 } 651 return 0; 652 out: 653 if (fs->ref_count < 0) 654 fs->ref_count = 0; 655 else if (fs->ref_count > 0) 656 --fs->ref_count; 657 658 if (fs->ref_count == 0) 659 swim_motor(base, OFF); 660 return err; 661 } 662 663 static int floppy_release(struct gendisk *disk, fmode_t mode) 664 { 665 struct floppy_state *fs = disk->private_data; 666 struct swim __iomem *base = fs->swd->base; 667 668 if (fs->ref_count < 0) 669 fs->ref_count = 0; 670 else if (fs->ref_count > 0) 671 --fs->ref_count; 672 673 if (fs->ref_count == 0) 674 swim_motor(base, OFF); 675 676 return 0; 677 } 678 679 static int floppy_ioctl(struct block_device *bdev, fmode_t mode, 680 unsigned int cmd, unsigned long param) 681 { 682 struct floppy_state *fs = bdev->bd_disk->private_data; 683 int err; 684 685 if ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)) 686 return -EPERM; 687 688 switch (cmd) { 689 case FDEJECT: 690 if (fs->ref_count != 1) 691 return -EBUSY; 692 err = floppy_eject(fs); 693 return err; 694 695 case FDGETPRM: 696 if (copy_to_user((void __user *) param, (void *) &floppy_type, 697 sizeof(struct floppy_struct))) 698 return -EFAULT; 699 break; 700 701 default: 702 printk(KERN_DEBUG "SWIM floppy_ioctl: unknown cmd %d\n", 703 cmd); 704 return -ENOSYS; 705 } 706 return 0; 707 } 708 709 static int floppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) 710 { 711 struct floppy_state *fs = bdev->bd_disk->private_data; 712 struct floppy_struct *g; 713 int ret; 714 715 ret = get_floppy_geometry(fs, 0, &g); 716 if (ret) 717 return ret; 718 719 geo->heads = g->head; 720 geo->sectors = g->sect; 721 geo->cylinders = g->track; 722 723 return 0; 724 } 725 726 static int floppy_check_change(struct gendisk *disk) 727 { 728 struct floppy_state *fs = disk->private_data; 729 730 return fs->ejected; 731 } 732 733 static int floppy_revalidate(struct gendisk *disk) 734 { 735 struct floppy_state *fs = disk->private_data; 736 struct swim __iomem *base = fs->swd->base; 737 738 swim_drive(base, fs->location); 739 740 if (fs->ejected) 741 setup_medium(fs); 742 743 if (!fs->disk_in) 744 swim_motor(base, OFF); 745 else 746 fs->ejected = 0; 747 748 return !fs->disk_in; 749 } 750 751 static struct block_device_operations floppy_fops = { 752 .owner = THIS_MODULE, 753 .open = floppy_open, 754 .release = floppy_release, 755 .locked_ioctl = floppy_ioctl, 756 .getgeo = floppy_getgeo, 757 .media_changed = floppy_check_change, 758 .revalidate_disk = floppy_revalidate, 759 }; 760 761 static struct kobject *floppy_find(dev_t dev, int *part, void *data) 762 { 763 struct swim_priv *swd = data; 764 int drive = (*part & 3); 765 766 if (drive > swd->floppy_count) 767 return NULL; 768 769 *part = 0; 770 return get_disk(swd->unit[drive].disk); 771 } 772 773 static int __devinit swim_add_floppy(struct swim_priv *swd, 774 enum drive_location location) 775 { 776 struct floppy_state *fs = &swd->unit[swd->floppy_count]; 777 struct swim __iomem *base = swd->base; 778 779 fs->location = location; 780 781 swim_drive(base, location); 782 783 swim_motor(base, OFF); 784 785 if (swim_readbit(base, SINGLE_SIDED)) 786 fs->head_number = 1; 787 else 788 fs->head_number = 2; 789 fs->ref_count = 0; 790 fs->ejected = 1; 791 792 swd->floppy_count++; 793 794 return 0; 795 } 796 797 static int __devinit swim_floppy_init(struct swim_priv *swd) 798 { 799 int err; 800 int drive; 801 struct swim __iomem *base = swd->base; 802 803 /* scan floppy drives */ 804 805 swim_drive(base, INTERNAL_DRIVE); 806 if (swim_readbit(base, DRIVE_PRESENT)) 807 swim_add_floppy(swd, INTERNAL_DRIVE); 808 swim_drive(base, EXTERNAL_DRIVE); 809 if (swim_readbit(base, DRIVE_PRESENT)) 810 swim_add_floppy(swd, EXTERNAL_DRIVE); 811 812 /* register floppy drives */ 813 814 err = register_blkdev(FLOPPY_MAJOR, "fd"); 815 if (err) { 816 printk(KERN_ERR "Unable to get major %d for SWIM floppy\n", 817 FLOPPY_MAJOR); 818 return -EBUSY; 819 } 820 821 for (drive = 0; drive < swd->floppy_count; drive++) { 822 swd->unit[drive].disk = alloc_disk(1); 823 if (swd->unit[drive].disk == NULL) { 824 err = -ENOMEM; 825 goto exit_put_disks; 826 } 827 swd->unit[drive].swd = swd; 828 } 829 830 swd->queue = blk_init_queue(do_fd_request, &swd->lock); 831 if (!swd->queue) { 832 err = -ENOMEM; 833 goto exit_put_disks; 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 sprintf(swd->unit[drive].disk->disk_name, "fd%d", drive); 841 swd->unit[drive].disk->fops = &floppy_fops; 842 swd->unit[drive].disk->private_data = &swd->unit[drive]; 843 swd->unit[drive].disk->queue = swd->queue; 844 set_capacity(swd->unit[drive].disk, 2880); 845 add_disk(swd->unit[drive].disk); 846 } 847 848 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, 849 floppy_find, NULL, swd); 850 851 return 0; 852 853 exit_put_disks: 854 unregister_blkdev(FLOPPY_MAJOR, "fd"); 855 while (drive--) 856 put_disk(swd->unit[drive].disk); 857 return err; 858 } 859 860 static int __devinit swim_probe(struct platform_device *dev) 861 { 862 struct resource *res; 863 struct swim __iomem *swim_base; 864 struct swim_priv *swd; 865 int ret; 866 867 res = platform_get_resource_byname(dev, IORESOURCE_MEM, "swim-regs"); 868 if (!res) { 869 ret = -ENODEV; 870 goto out; 871 } 872 873 if (!request_mem_region(res->start, resource_size(res), CARDNAME)) { 874 ret = -EBUSY; 875 goto out; 876 } 877 878 swim_base = ioremap(res->start, resource_size(res)); 879 if (!swim_base) { 880 return -ENOMEM; 881 goto out_release_io; 882 } 883 884 /* probe device */ 885 886 set_swim_mode(swim_base, 1); 887 if (!get_swim_mode(swim_base)) { 888 printk(KERN_INFO "SWIM device not found !\n"); 889 ret = -ENODEV; 890 goto out_iounmap; 891 } 892 893 /* set platform driver data */ 894 895 swd = kzalloc(sizeof(struct swim_priv), GFP_KERNEL); 896 if (!swd) { 897 ret = -ENOMEM; 898 goto out_iounmap; 899 } 900 platform_set_drvdata(dev, swd); 901 902 swd->base = swim_base; 903 904 ret = swim_floppy_init(swd); 905 if (ret) 906 goto out_kfree; 907 908 return 0; 909 910 out_kfree: 911 platform_set_drvdata(dev, NULL); 912 kfree(swd); 913 out_iounmap: 914 iounmap(swim_base); 915 out_release_io: 916 release_mem_region(res->start, resource_size(res)); 917 out: 918 return ret; 919 } 920 921 static int __devexit 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 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); 928 929 for (drive = 0; drive < swd->floppy_count; drive++) { 930 del_gendisk(swd->unit[drive].disk); 931 put_disk(swd->unit[drive].disk); 932 } 933 934 unregister_blkdev(FLOPPY_MAJOR, "fd"); 935 936 blk_cleanup_queue(swd->queue); 937 938 /* eject floppies */ 939 940 for (drive = 0; drive < swd->floppy_count; drive++) 941 floppy_eject(&swd->unit[drive]); 942 943 iounmap(swd->base); 944 945 res = platform_get_resource_byname(dev, IORESOURCE_MEM, "swim-regs"); 946 if (res) 947 release_mem_region(res->start, resource_size(res)); 948 949 platform_set_drvdata(dev, NULL); 950 kfree(swd); 951 952 return 0; 953 } 954 955 static struct platform_driver swim_driver = { 956 .probe = swim_probe, 957 .remove = __devexit_p(swim_remove), 958 .driver = { 959 .name = CARDNAME, 960 .owner = THIS_MODULE, 961 }, 962 }; 963 964 static int __init swim_init(void) 965 { 966 printk(KERN_INFO "SWIM floppy driver %s\n", DRIVER_VERSION); 967 968 return platform_driver_register(&swim_driver); 969 } 970 module_init(swim_init); 971 972 static void __exit swim_exit(void) 973 { 974 platform_driver_unregister(&swim_driver); 975 } 976 module_exit(swim_exit); 977 978 MODULE_DESCRIPTION("Driver for SWIM floppy controller"); 979 MODULE_LICENSE("GPL"); 980 MODULE_AUTHOR("Laurent Vivier <laurent@lvivier.info>"); 981 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); 982