drivers/block/swim3.c

   1 /*
   2  * Driver for the SWIM3 (Super Woz Integrated Machine 3)
   3  * floppy controller found on Power Macintoshes.
   4  *
   5  * Copyright (C) 1996 Paul Mackerras.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version
  10  * 2 of the License, or (at your option) any later version.
  11  */
  12
  13 /*
  14  * TODO:
  15  * handle 2 drives
  16  * handle GCR disks
  17  */
  18
  19 #undef DEBUG
  20
  21 #include <linux/stddef.h>
  22 #include <linux/kernel.h>
  23 #include <linux/sched/signal.h>
  24 #include <linux/timer.h>
  25 #include <linux/delay.h>
  26 #include <linux/fd.h>
  27 #include <linux/ioctl.h>
  28 #include <linux/blk-mq.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/mutex.h>
  31 #include <linux/module.h>
  32 #include <linux/spinlock.h>
  33 #include <linux/wait.h>
  34 #include <asm/io.h>
  35 #include <asm/dbdma.h>
  36 #include <asm/prom.h>
  37 #include <linux/uaccess.h>
  38 #include <asm/mediabay.h>
  39 #include <asm/machdep.h>
  40 #include <asm/pmac_feature.h>
  41
  42 #define MAX_FLOPPIES    2
  43
  44 static DEFINE_MUTEX(swim3_mutex);
  45 static struct gendisk *disks[MAX_FLOPPIES];
  46
  47 enum swim_state {
  48         idle,
  49         locating,
  50         seeking,
  51         settling,
  52         do_transfer,
  53         jogging,
  54         available,
  55         revalidating,
  56         ejecting
  57 };
  58
  59 #define REG(x)  unsigned char x; char x ## _pad[15];
  60
  61 /*
  62  * The names for these registers mostly represent speculation on my part.
  63  * It will be interesting to see how close they are to the names Apple uses.
  64  */
  65 struct swim3 {
  66         REG(data);
  67         REG(timer);             /* counts down at 1MHz */
  68         REG(error);
  69         REG(mode);
  70         REG(select);            /* controls CA0, CA1, CA2 and LSTRB signals */
  71         REG(setup);
  72         REG(control);           /* writing bits clears them */
  73         REG(status);            /* writing bits sets them in control */
  74         REG(intr);
  75         REG(nseek);             /* # tracks to seek */
  76         REG(ctrack);            /* current track number */
  77         REG(csect);             /* current sector number */
  78         REG(gap3);              /* size of gap 3 in track format */
  79         REG(sector);            /* sector # to read or write */
  80         REG(nsect);             /* # sectors to read or write */
  81         REG(intr_enable);
  82 };
  83
  84 #define control_bic     control
  85 #define control_bis     status
  86
  87 /* Bits in select register */
  88 #define CA_MASK         7
  89 #define LSTRB           8
  90
  91 /* Bits in control register */
  92 #define DO_SEEK         0x80
  93 #define FORMAT          0x40
  94 #define SELECT          0x20
  95 #define WRITE_SECTORS   0x10
  96 #define DO_ACTION       0x08
  97 #define DRIVE2_ENABLE   0x04
  98 #define DRIVE_ENABLE    0x02
  99 #define INTR_ENABLE     0x01
 100
 101 /* Bits in status register */
 102 #define FIFO_1BYTE      0x80
 103 #define FIFO_2BYTE      0x40
 104 #define ERROR           0x20
 105 #define DATA            0x08
 106 #define RDDATA          0x04
 107 #define INTR_PENDING    0x02
 108 #define MARK_BYTE       0x01
 109
 110 /* Bits in intr and intr_enable registers */
 111 #define ERROR_INTR      0x20
 112 #define DATA_CHANGED    0x10
 113 #define TRANSFER_DONE   0x08
 114 #define SEEN_SECTOR     0x04
 115 #define SEEK_DONE       0x02
 116 #define TIMER_DONE      0x01
 117
 118 /* Bits in error register */
 119 #define ERR_DATA_CRC    0x80
 120 #define ERR_ADDR_CRC    0x40
 121 #define ERR_OVERRUN     0x04
 122 #define ERR_UNDERRUN    0x01
 123
 124 /* Bits in setup register */
 125 #define S_SW_RESET      0x80
 126 #define S_GCR_WRITE     0x40
 127 #define S_IBM_DRIVE     0x20
 128 #define S_TEST_MODE     0x10
 129 #define S_FCLK_DIV2     0x08
 130 #define S_GCR           0x04
 131 #define S_COPY_PROT     0x02
 132 #define S_INV_WDATA     0x01
 133
 134 /* Select values for swim3_action */
 135 #define SEEK_POSITIVE   0
 136 #define SEEK_NEGATIVE   4
 137 #define STEP            1
 138 #define MOTOR_ON        2
 139 #define MOTOR_OFF       6
 140 #define INDEX           3
 141 #define EJECT           7
 142 #define SETMFM          9
 143 #define SETGCR          13
 144
 145 /* Select values for swim3_select and swim3_readbit */
 146 #define STEP_DIR        0
 147 #define STEPPING        1
 148 #define MOTOR_ON        2
 149 #define RELAX           3       /* also eject in progress */
 150 #define READ_DATA_0     4
 151 #define ONEMEG_DRIVE    5
 152 #define SINGLE_SIDED    6       /* drive or diskette is 4MB type? */
 153 #define DRIVE_PRESENT   7
 154 #define DISK_IN         8
 155 #define WRITE_PROT      9
 156 #define TRACK_ZERO      10
 157 #define TACHO           11
 158 #define READ_DATA_1     12
 159 #define GCR_MODE        13
 160 #define SEEK_COMPLETE   14
 161 #define TWOMEG_MEDIA    15
 162
 163 /* Definitions of values used in writing and formatting */
 164 #define DATA_ESCAPE     0x99
 165 #define GCR_SYNC_EXC    0x3f
 166 #define GCR_SYNC_CONV   0x80
 167 #define GCR_FIRST_MARK  0xd5
 168 #define GCR_SECOND_MARK 0xaa
 169 #define GCR_ADDR_MARK   "\xd5\xaa\x00"
 170 #define GCR_DATA_MARK   "\xd5\xaa\x0b"
 171 #define GCR_SLIP_BYTE   "\x27\xaa"
 172 #define GCR_SELF_SYNC   "\x3f\xbf\x1e\x34\x3c\x3f"
 173
 174 #define DATA_99         "\x99\x99"
 175 #define MFM_ADDR_MARK   "\x99\xa1\x99\xa1\x99\xa1\x99\xfe"
 176 #define MFM_INDEX_MARK  "\x99\xc2\x99\xc2\x99\xc2\x99\xfc"
 177 #define MFM_GAP_LEN     12
 178
 179 struct floppy_state {
 180         enum swim_state state;
 181         struct swim3 __iomem *swim3;    /* hardware registers */
 182         struct dbdma_regs __iomem *dma; /* DMA controller registers */
 183         int     swim3_intr;     /* interrupt number for SWIM3 */
 184         int     dma_intr;       /* interrupt number for DMA channel */
 185         int     cur_cyl;        /* cylinder head is on, or -1 */
 186         int     cur_sector;     /* last sector we saw go past */
 187         int     req_cyl;        /* the cylinder for the current r/w request */
 188         int     head;           /* head number ditto */
 189         int     req_sector;     /* sector number ditto */
 190         int     scount;         /* # sectors we're transferring at present */
 191         int     retries;
 192         int     settle_time;
 193         int     secpercyl;      /* disk geometry information */
 194         int     secpertrack;
 195         int     total_secs;
 196         int     write_prot;     /* 1 if write-protected, 0 if not, -1 dunno */
 197         struct dbdma_cmd *dma_cmd;
 198         int     ref_count;
 199         int     expect_cyl;
 200         struct timer_list timeout;
 201         int     timeout_pending;
 202         int     ejected;
 203         wait_queue_head_t wait;
 204         int     wanted;
 205         struct macio_dev *mdev;
 206         char    dbdma_cmd_space[5 * sizeof(struct dbdma_cmd)];
 207         int     index;
 208         struct request *cur_req;
 209         struct blk_mq_tag_set tag_set;
 210 };
 211
 212 #define swim3_err(fmt, arg...)  dev_err(&fs->mdev->ofdev.dev, "[fd%d] " fmt, fs->index, arg)
 213 #define swim3_warn(fmt, arg...) dev_warn(&fs->mdev->ofdev.dev, "[fd%d] " fmt, fs->index, arg)
 214 #define swim3_info(fmt, arg...) dev_info(&fs->mdev->ofdev.dev, "[fd%d] " fmt, fs->index, arg)
 215
 216 #ifdef DEBUG
 217 #define swim3_dbg(fmt, arg...)  dev_dbg(&fs->mdev->ofdev.dev, "[fd%d] " fmt, fs->index, arg)
 218 #else
 219 #define swim3_dbg(fmt, arg...)  do { } while(0)
 220 #endif
 221
 222 static struct floppy_state floppy_states[MAX_FLOPPIES];
 223 static int floppy_count = 0;
 224 static DEFINE_SPINLOCK(swim3_lock);
 225
 226 static unsigned short write_preamble[] = {
 227         0x4e4e, 0x4e4e, 0x4e4e, 0x4e4e, 0x4e4e, /* gap field */
 228         0, 0, 0, 0, 0, 0,                       /* sync field */
 229         0x99a1, 0x99a1, 0x99a1, 0x99fb,         /* data address mark */
 230         0x990f                                  /* no escape for 512 bytes */
 231 };
 232
 233 static unsigned short write_postamble[] = {
 234         0x9904,                                 /* insert CRC */
 235         0x4e4e, 0x4e4e,
 236         0x9908,                                 /* stop writing */
 237         0, 0, 0, 0, 0, 0
 238 };
 239
 240 static void seek_track(struct floppy_state *fs, int n);
 241 static void init_dma(struct dbdma_cmd *cp, int cmd, void *buf, int count);
 242 static void act(struct floppy_state *fs);
 243 static void scan_timeout(struct timer_list *t);
 244 static void seek_timeout(struct timer_list *t);
 245 static void settle_timeout(struct timer_list *t);
 246 static void xfer_timeout(struct timer_list *t);
 247 static irqreturn_t swim3_interrupt(int irq, void *dev_id);
 248 /*static void fd_dma_interrupt(int irq, void *dev_id);*/
 249 static int grab_drive(struct floppy_state *fs, enum swim_state state,
 250                       int interruptible);
 251 static void release_drive(struct floppy_state *fs);
 252 static int fd_eject(struct floppy_state *fs);
 253 static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
 254                         unsigned int cmd, unsigned long param);
 255 static int floppy_open(struct block_device *bdev, fmode_t mode);
 256 static void floppy_release(struct gendisk *disk, fmode_t mode);
 257 static unsigned int floppy_check_events(struct gendisk *disk,
 258                                         unsigned int clearing);
 259 static int floppy_revalidate(struct gendisk *disk);
 260
 261 static bool swim3_end_request(struct floppy_state *fs, blk_status_t err, unsigned int nr_bytes)
 262 {
 263         struct request *req = fs->cur_req;
 264
 265         swim3_dbg("  end request, err=%d nr_bytes=%d, cur_req=%p\n",
 266                   err, nr_bytes, req);
 267
 268         if (err)
 269                 nr_bytes = blk_rq_cur_bytes(req);
 270         if (blk_update_request(req, err, nr_bytes))
 271                 return true;
 272         __blk_mq_end_request(req, err);
 273         fs->cur_req = NULL;
 274         return false;
 275 }
 276
 277 static void swim3_select(struct floppy_state *fs, int sel)
 278 {
 279         struct swim3 __iomem *sw = fs->swim3;
 280
 281         out_8(&sw->select, RELAX);
 282         if (sel & 8)
 283                 out_8(&sw->control_bis, SELECT);
 284         else
 285                 out_8(&sw->control_bic, SELECT);
 286         out_8(&sw->select, sel & CA_MASK);
 287 }
 288
 289 static void swim3_action(struct floppy_state *fs, int action)
 290 {
 291         struct swim3 __iomem *sw = fs->swim3;
 292
 293         swim3_select(fs, action);
 294         udelay(1);
 295         out_8(&sw->select, sw->select | LSTRB);
 296         udelay(2);
 297         out_8(&sw->select, sw->select & ~LSTRB);
 298         udelay(1);
 299 }
 300
 301 static int swim3_readbit(struct floppy_state *fs, int bit)
 302 {
 303         struct swim3 __iomem *sw = fs->swim3;
 304         int stat;
 305
 306         swim3_select(fs, bit);
 307         udelay(1);
 308         stat = in_8(&sw->status);
 309         return (stat & DATA) == 0;
 310 }
 311
 312 static blk_status_t swim3_queue_rq(struct blk_mq_hw_ctx *hctx,
 313                                    const struct blk_mq_queue_data *bd)
 314 {
 315         struct floppy_state *fs = hctx->queue->queuedata;
 316         struct request *req = bd->rq;
 317         unsigned long x;
 318
 319         spin_lock_irq(&swim3_lock);
 320         if (fs->cur_req || fs->state != idle) {
 321                 spin_unlock_irq(&swim3_lock);
 322                 return BLK_STS_DEV_RESOURCE;
 323         }
 324         blk_mq_start_request(req);
 325         fs->cur_req = req;
 326         if (fs->mdev->media_bay &&
 327             check_media_bay(fs->mdev->media_bay) != MB_FD) {
 328                 swim3_dbg("%s", "  media bay absent, dropping req\n");
 329                 swim3_end_request(fs, BLK_STS_IOERR, 0);
 330                 goto out;
 331         }
 332         if (fs->ejected) {
 333                 swim3_dbg("%s", "  disk ejected\n");
 334                 swim3_end_request(fs, BLK_STS_IOERR, 0);
 335                 goto out;
 336         }
 337         if (rq_data_dir(req) == WRITE) {
 338                 if (fs->write_prot < 0)
 339                         fs->write_prot = swim3_readbit(fs, WRITE_PROT);
 340                 if (fs->write_prot) {
 341                         swim3_dbg("%s", "  try to write, disk write protected\n");
 342                         swim3_end_request(fs, BLK_STS_IOERR, 0);
 343                         goto out;
 344                 }
 345         }
 346
 347         /*
 348          * Do not remove the cast. blk_rq_pos(req) is now a sector_t and can be
 349          * 64 bits, but it will never go past 32 bits for this driver anyway, so
 350          * we can safely cast it down and not have to do a 64/32 division
 351          */
 352         fs->req_cyl = ((long)blk_rq_pos(req)) / fs->secpercyl;
 353         x = ((long)blk_rq_pos(req)) % fs->secpercyl;
 354         fs->head = x / fs->secpertrack;
 355         fs->req_sector = x % fs->secpertrack + 1;
 356         fs->state = do_transfer;
 357         fs->retries = 0;
 358
 359         act(fs);
 360
 361 out:
 362         spin_unlock_irq(&swim3_lock);
 363         return BLK_STS_OK;
 364 }
 365
 366 static void set_timeout(struct floppy_state *fs, int nticks,
 367                         void (*proc)(struct timer_list *t))
 368 {
 369         if (fs->timeout_pending)
 370                 del_timer(&fs->timeout);
 371         fs->timeout.expires = jiffies + nticks;
 372         fs->timeout.function = proc;
 373         add_timer(&fs->timeout);
 374         fs->timeout_pending = 1;
 375 }
 376
 377 static inline void scan_track(struct floppy_state *fs)
 378 {
 379         struct swim3 __iomem *sw = fs->swim3;
 380
 381         swim3_select(fs, READ_DATA_0);
 382         in_8(&sw->intr);                /* clear SEEN_SECTOR bit */
 383         in_8(&sw->error);
 384         out_8(&sw->intr_enable, SEEN_SECTOR);
 385         out_8(&sw->control_bis, DO_ACTION);
 386         /* enable intr when track found */
 387         set_timeout(fs, HZ, scan_timeout);      /* enable timeout */
 388 }
 389
 390 static inline void seek_track(struct floppy_state *fs, int n)
 391 {
 392         struct swim3 __iomem *sw = fs->swim3;
 393
 394         if (n >= 0) {
 395                 swim3_action(fs, SEEK_POSITIVE);
 396                 sw->nseek = n;
 397         } else {
 398                 swim3_action(fs, SEEK_NEGATIVE);
 399                 sw->nseek = -n;
 400         }
 401         fs->expect_cyl = (fs->cur_cyl >= 0)? fs->cur_cyl + n: -1;
 402         swim3_select(fs, STEP);
 403         in_8(&sw->error);
 404         /* enable intr when seek finished */
 405         out_8(&sw->intr_enable, SEEK_DONE);
 406         out_8(&sw->control_bis, DO_SEEK);
 407         set_timeout(fs, 3*HZ, seek_timeout);    /* enable timeout */
 408         fs->settle_time = 0;
 409 }
 410
 411 static inline void init_dma(struct dbdma_cmd *cp, int cmd,
 412                             void *buf, int count)
 413 {
 414         cp->req_count = cpu_to_le16(count);
 415         cp->command = cpu_to_le16(cmd);
 416         cp->phy_addr = cpu_to_le32(virt_to_bus(buf));
 417         cp->xfer_status = 0;
 418 }
 419
 420 static inline void setup_transfer(struct floppy_state *fs)
 421 {
 422         int n;
 423         struct swim3 __iomem *sw = fs->swim3;
 424         struct dbdma_cmd *cp = fs->dma_cmd;
 425         struct dbdma_regs __iomem *dr = fs->dma;
 426         struct request *req = fs->cur_req;
 427
 428         if (blk_rq_cur_sectors(req) <= 0) {
 429                 swim3_warn("%s", "Transfer 0 sectors ?\n");
 430                 return;
 431         }
 432         if (rq_data_dir(req) == WRITE)
 433                 n = 1;
 434         else {
 435                 n = fs->secpertrack - fs->req_sector + 1;
 436                 if (n > blk_rq_cur_sectors(req))
 437                         n = blk_rq_cur_sectors(req);
 438         }
 439
 440         swim3_dbg("  setup xfer at sect %d (of %d) head %d for %d\n",
 441                   fs->req_sector, fs->secpertrack, fs->head, n);
 442
 443         fs->scount = n;
 444         swim3_select(fs, fs->head? READ_DATA_1: READ_DATA_0);
 445         out_8(&sw->sector, fs->req_sector);
 446         out_8(&sw->nsect, n);
 447         out_8(&sw->gap3, 0);
 448         out_le32(&dr->cmdptr, virt_to_bus(cp));
 449         if (rq_data_dir(req) == WRITE) {
 450                 /* Set up 3 dma commands: write preamble, data, postamble */
 451                 init_dma(cp, OUTPUT_MORE, write_preamble, sizeof(write_preamble));
 452                 ++cp;
 453                 init_dma(cp, OUTPUT_MORE, bio_data(req->bio), 512);
 454                 ++cp;
 455                 init_dma(cp, OUTPUT_LAST, write_postamble, sizeof(write_postamble));
 456         } else {
 457                 init_dma(cp, INPUT_LAST, bio_data(req->bio), n * 512);
 458         }
 459         ++cp;
 460         out_le16(&cp->command, DBDMA_STOP);
 461         out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
 462         in_8(&sw->error);
 463         out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
 464         if (rq_data_dir(req) == WRITE)
 465                 out_8(&sw->control_bis, WRITE_SECTORS);
 466         in_8(&sw->intr);
 467         out_le32(&dr->control, (RUN << 16) | RUN);
 468         /* enable intr when transfer complete */
 469         out_8(&sw->intr_enable, TRANSFER_DONE);
 470         out_8(&sw->control_bis, DO_ACTION);
 471         set_timeout(fs, 2*HZ, xfer_timeout);    /* enable timeout */
 472 }
 473
 474 static void act(struct floppy_state *fs)
 475 {
 476         for (;;) {
 477                 swim3_dbg("  act loop, state=%d, req_cyl=%d, cur_cyl=%d\n",
 478                           fs->state, fs->req_cyl, fs->cur_cyl);
 479
 480                 switch (fs->state) {
 481                 case idle:
 482                         return;         /* XXX shouldn't get here */
 483
 484                 case locating:
 485                         if (swim3_readbit(fs, TRACK_ZERO)) {
 486                                 swim3_dbg("%s", "    locate track 0\n");
 487                                 fs->cur_cyl = 0;
 488                                 if (fs->req_cyl == 0)
 489                                         fs->state = do_transfer;
 490                                 else
 491                                         fs->state = seeking;
 492                                 break;
 493                         }
 494                         scan_track(fs);
 495                         return;
 496
 497                 case seeking:
 498                         if (fs->cur_cyl < 0) {
 499                                 fs->expect_cyl = -1;
 500                                 fs->state = locating;
 501                                 break;
 502                         }
 503                         if (fs->req_cyl == fs->cur_cyl) {
 504                                 swim3_warn("%s", "Whoops, seeking 0\n");
 505                                 fs->state = do_transfer;
 506                                 break;
 507                         }
 508                         seek_track(fs, fs->req_cyl - fs->cur_cyl);
 509                         return;
 510
 511                 case settling:
 512                         /* check for SEEK_COMPLETE after 30ms */
 513                         fs->settle_time = (HZ + 32) / 33;
 514                         set_timeout(fs, fs->settle_time, settle_timeout);
 515                         return;
 516
 517                 case do_transfer:
 518                         if (fs->cur_cyl != fs->req_cyl) {
 519                                 if (fs->retries > 5) {
 520                                         swim3_err("Wrong cylinder in transfer, want: %d got %d\n",
 521                                                   fs->req_cyl, fs->cur_cyl);
 522                                         swim3_end_request(fs, BLK_STS_IOERR, 0);
 523                                         fs->state = idle;
 524                                         return;
 525                                 }
 526                                 fs->state = seeking;
 527                                 break;
 528                         }
 529                         setup_transfer(fs);
 530                         return;
 531
 532                 case jogging:
 533                         seek_track(fs, -5);
 534                         return;
 535
 536                 default:
 537                         swim3_err("Unknown state %d\n", fs->state);
 538                         return;
 539                 }
 540         }
 541 }
 542
 543 static void scan_timeout(struct timer_list *t)
 544 {
 545         struct floppy_state *fs = from_timer(fs, t, timeout);
 546         struct swim3 __iomem *sw = fs->swim3;
 547         unsigned long flags;
 548
 549         swim3_dbg("* scan timeout, state=%d\n", fs->state);
 550
 551         spin_lock_irqsave(&swim3_lock, flags);
 552         fs->timeout_pending = 0;
 553         out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
 554         out_8(&sw->select, RELAX);
 555         out_8(&sw->intr_enable, 0);
 556         fs->cur_cyl = -1;
 557         if (fs->retries > 5) {
 558                 swim3_end_request(fs, BLK_STS_IOERR, 0);
 559                 fs->state = idle;
 560         } else {
 561                 fs->state = jogging;
 562                 act(fs);
 563         }
 564         spin_unlock_irqrestore(&swim3_lock, flags);
 565 }
 566
 567 static void seek_timeout(struct timer_list *t)
 568 {
 569         struct floppy_state *fs = from_timer(fs, t, timeout);
 570         struct swim3 __iomem *sw = fs->swim3;
 571         unsigned long flags;
 572
 573         swim3_dbg("* seek timeout, state=%d\n", fs->state);
 574
 575         spin_lock_irqsave(&swim3_lock, flags);
 576         fs->timeout_pending = 0;
 577         out_8(&sw->control_bic, DO_SEEK);
 578         out_8(&sw->select, RELAX);
 579         out_8(&sw->intr_enable, 0);
 580         swim3_err("%s", "Seek timeout\n");
 581         swim3_end_request(fs, BLK_STS_IOERR, 0);
 582         fs->state = idle;
 583         spin_unlock_irqrestore(&swim3_lock, flags);
 584 }
 585
 586 static void settle_timeout(struct timer_list *t)
 587 {
 588         struct floppy_state *fs = from_timer(fs, t, timeout);
 589         struct swim3 __iomem *sw = fs->swim3;
 590         unsigned long flags;
 591
 592         swim3_dbg("* settle timeout, state=%d\n", fs->state);
 593
 594         spin_lock_irqsave(&swim3_lock, flags);
 595         fs->timeout_pending = 0;
 596         if (swim3_readbit(fs, SEEK_COMPLETE)) {
 597                 out_8(&sw->select, RELAX);
 598                 fs->state = locating;
 599                 act(fs);
 600                 goto unlock;
 601         }
 602         out_8(&sw->select, RELAX);
 603         if (fs->settle_time < 2*HZ) {
 604                 ++fs->settle_time;
 605                 set_timeout(fs, 1, settle_timeout);
 606                 goto unlock;
 607         }
 608         swim3_err("%s", "Seek settle timeout\n");
 609         swim3_end_request(fs, BLK_STS_IOERR, 0);
 610         fs->state = idle;
 611  unlock:
 612         spin_unlock_irqrestore(&swim3_lock, flags);
 613 }
 614
 615 static void xfer_timeout(struct timer_list *t)
 616 {
 617         struct floppy_state *fs = from_timer(fs, t, timeout);
 618         struct swim3 __iomem *sw = fs->swim3;
 619         struct dbdma_regs __iomem *dr = fs->dma;
 620         unsigned long flags;
 621         int n;
 622
 623         swim3_dbg("* xfer timeout, state=%d\n", fs->state);
 624
 625         spin_lock_irqsave(&swim3_lock, flags);
 626         fs->timeout_pending = 0;
 627         out_le32(&dr->control, RUN << 16);
 628         /* We must wait a bit for dbdma to stop */
 629         for (n = 0; (in_le32(&dr->status) & ACTIVE) && n < 1000; n++)
 630                 udelay(1);
 631         out_8(&sw->intr_enable, 0);
 632         out_8(&sw->control_bic, WRITE_SECTORS | DO_ACTION);
 633         out_8(&sw->select, RELAX);
 634         swim3_err("Timeout %sing sector %ld\n",
 635                (rq_data_dir(fs->cur_req)==WRITE? "writ": "read"),
 636                (long)blk_rq_pos(fs->cur_req));
 637         swim3_end_request(fs, BLK_STS_IOERR, 0);
 638         fs->state = idle;
 639         spin_unlock_irqrestore(&swim3_lock, flags);
 640 }
 641
 642 static irqreturn_t swim3_interrupt(int irq, void *dev_id)
 643 {
 644         struct floppy_state *fs = (struct floppy_state *) dev_id;
 645         struct swim3 __iomem *sw = fs->swim3;
 646         int intr, err, n;
 647         int stat, resid;
 648         struct dbdma_regs __iomem *dr;
 649         struct dbdma_cmd *cp;
 650         unsigned long flags;
 651         struct request *req = fs->cur_req;
 652
 653         swim3_dbg("* interrupt, state=%d\n", fs->state);
 654
 655         spin_lock_irqsave(&swim3_lock, flags);
 656         intr = in_8(&sw->intr);
 657         err = (intr & ERROR_INTR)? in_8(&sw->error): 0;
 658         if ((intr & ERROR_INTR) && fs->state != do_transfer)
 659                 swim3_err("Non-transfer error interrupt: state=%d, dir=%x, intr=%x, err=%x\n",
 660                           fs->state, rq_data_dir(req), intr, err);
 661         switch (fs->state) {
 662         case locating:
 663                 if (intr & SEEN_SECTOR) {
 664                         out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
 665                         out_8(&sw->select, RELAX);
 666                         out_8(&sw->intr_enable, 0);
 667                         del_timer(&fs->timeout);
 668                         fs->timeout_pending = 0;
 669                         if (sw->ctrack == 0xff) {
 670                                 swim3_err("%s", "Seen sector but cyl=ff?\n");
 671                                 fs->cur_cyl = -1;
 672                                 if (fs->retries > 5) {
 673                                         swim3_end_request(fs, BLK_STS_IOERR, 0);
 674                                         fs->state = idle;
 675                                 } else {
 676                                         fs->state = jogging;
 677                                         act(fs);
 678                                 }
 679                                 break;
 680                         }
 681                         fs->cur_cyl = sw->ctrack;
 682                         fs->cur_sector = sw->csect;
 683                         if (fs->expect_cyl != -1 && fs->expect_cyl != fs->cur_cyl)
 684                                 swim3_err("Expected cyl %d, got %d\n",
 685                                           fs->expect_cyl, fs->cur_cyl);
 686                         fs->state = do_transfer;
 687                         act(fs);
 688                 }
 689                 break;
 690         case seeking:
 691         case jogging:
 692                 if (sw->nseek == 0) {
 693                         out_8(&sw->control_bic, DO_SEEK);
 694                         out_8(&sw->select, RELAX);
 695                         out_8(&sw->intr_enable, 0);
 696                         del_timer(&fs->timeout);
 697                         fs->timeout_pending = 0;
 698                         if (fs->state == seeking)
 699                                 ++fs->retries;
 700                         fs->state = settling;
 701                         act(fs);
 702                 }
 703                 break;
 704         case settling:
 705                 out_8(&sw->intr_enable, 0);
 706                 del_timer(&fs->timeout);
 707                 fs->timeout_pending = 0;
 708                 act(fs);
 709                 break;
 710         case do_transfer:
 711                 if ((intr & (ERROR_INTR | TRANSFER_DONE)) == 0)
 712                         break;
 713                 out_8(&sw->intr_enable, 0);
 714                 out_8(&sw->control_bic, WRITE_SECTORS | DO_ACTION);
 715                 out_8(&sw->select, RELAX);
 716                 del_timer(&fs->timeout);
 717                 fs->timeout_pending = 0;
 718                 dr = fs->dma;
 719                 cp = fs->dma_cmd;
 720                 if (rq_data_dir(req) == WRITE)
 721                         ++cp;
 722                 /*
 723                  * Check that the main data transfer has finished.
 724                  * On writing, the swim3 sometimes doesn't use
 725                  * up all the bytes of the postamble, so we can still
 726                  * see DMA active here.  That doesn't matter as long
 727                  * as all the sector data has been transferred.
 728                  */
 729                 if ((intr & ERROR_INTR) == 0 && cp->xfer_status == 0) {
 730                         /* wait a little while for DMA to complete */
 731                         for (n = 0; n < 100; ++n) {
 732                                 if (cp->xfer_status != 0)
 733                                         break;
 734                                 udelay(1);
 735                                 barrier();
 736                         }
 737                 }
 738                 /* turn off DMA */
 739                 out_le32(&dr->control, (RUN | PAUSE) << 16);
 740                 stat = le16_to_cpu(cp->xfer_status);
 741                 resid = le16_to_cpu(cp->res_count);
 742                 if (intr & ERROR_INTR) {
 743                         n = fs->scount - 1 - resid / 512;
 744                         if (n > 0) {
 745                                 blk_update_request(req, 0, n << 9);
 746                                 fs->req_sector += n;
 747                         }
 748                         if (fs->retries < 5) {
 749                                 ++fs->retries;
 750                                 act(fs);
 751                         } else {
 752                                 swim3_err("Error %sing block %ld (err=%x)\n",
 753                                        rq_data_dir(req) == WRITE? "writ": "read",
 754                                        (long)blk_rq_pos(req), err);
 755                                 swim3_end_request(fs, BLK_STS_IOERR, 0);
 756                                 fs->state = idle;
 757                         }
 758                 } else {
 759                         if ((stat & ACTIVE) == 0 || resid != 0) {
 760                                 /* musta been an error */
 761                                 swim3_err("fd dma error: stat=%x resid=%d\n", stat, resid);
 762                                 swim3_err("  state=%d, dir=%x, intr=%x, err=%x\n",
 763                                           fs->state, rq_data_dir(req), intr, err);
 764                                 swim3_end_request(fs, BLK_STS_IOERR, 0);
 765                                 fs->state = idle;
 766                                 break;
 767                         }
 768                         fs->retries = 0;
 769                         if (swim3_end_request(fs, 0, fs->scount << 9)) {
 770                                 fs->req_sector += fs->scount;
 771                                 if (fs->req_sector > fs->secpertrack) {
 772                                         fs->req_sector -= fs->secpertrack;
 773                                         if (++fs->head > 1) {
 774                                                 fs->head = 0;
 775                                                 ++fs->req_cyl;
 776                                         }
 777                                 }
 778                                 act(fs);
 779                         } else
 780                                 fs->state = idle;
 781                 }
 782                 break;
 783         default:
 784                 swim3_err("Don't know what to do in state %d\n", fs->state);
 785         }
 786         spin_unlock_irqrestore(&swim3_lock, flags);
 787         return IRQ_HANDLED;
 788 }
 789
 790 /*
 791 static void fd_dma_interrupt(int irq, void *dev_id)
 792 {
 793 }
 794 */
 795
 796 /* Called under the mutex to grab exclusive access to a drive */
 797 static int grab_drive(struct floppy_state *fs, enum swim_state state,
 798                       int interruptible)
 799 {
 800         unsigned long flags;
 801
 802         swim3_dbg("%s", "-> grab drive\n");
 803
 804         spin_lock_irqsave(&swim3_lock, flags);
 805         if (fs->state != idle && fs->state != available) {
 806                 ++fs->wanted;
 807                 /* this will enable irqs in order to sleep */
 808                 if (!interruptible)
 809                         wait_event_lock_irq(fs->wait,
 810                                         fs->state == available,
 811                                         swim3_lock);
 812                 else if (wait_event_interruptible_lock_irq(fs->wait,
 813                                         fs->state == available,
 814                                         swim3_lock)) {
 815                         --fs->wanted;
 816                         spin_unlock_irqrestore(&swim3_lock, flags);
 817                         return -EINTR;
 818                 }
 819                 --fs->wanted;
 820         }
 821         fs->state = state;
 822         spin_unlock_irqrestore(&swim3_lock, flags);
 823
 824         return 0;
 825 }
 826
 827 static void release_drive(struct floppy_state *fs)
 828 {
 829         struct request_queue *q = disks[fs->index]->queue;
 830         unsigned long flags;
 831
 832         swim3_dbg("%s", "-> release drive\n");
 833
 834         spin_lock_irqsave(&swim3_lock, flags);
 835         fs->state = idle;
 836         spin_unlock_irqrestore(&swim3_lock, flags);
 837
 838         blk_mq_freeze_queue(q);
 839         blk_mq_quiesce_queue(q);
 840         blk_mq_unquiesce_queue(q);
 841         blk_mq_unfreeze_queue(q);
 842 }
 843
 844 static int fd_eject(struct floppy_state *fs)
 845 {
 846         int err, n;
 847
 848         err = grab_drive(fs, ejecting, 1);
 849         if (err)
 850                 return err;
 851         swim3_action(fs, EJECT);
 852         for (n = 20; n > 0; --n) {
 853                 if (signal_pending(current)) {
 854                         err = -EINTR;
 855                         break;
 856                 }
 857                 swim3_select(fs, RELAX);
 858                 schedule_timeout_interruptible(1);
 859                 if (swim3_readbit(fs, DISK_IN) == 0)
 860                         break;
 861         }
 862         swim3_select(fs, RELAX);
 863         udelay(150);
 864         fs->ejected = 1;
 865         release_drive(fs);
 866         return err;
 867 }
 868
 869 static struct floppy_struct floppy_type =
 870         { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,NULL };    /*  7 1.44MB 3.5"   */
 871
 872 static int floppy_locked_ioctl(struct block_device *bdev, fmode_t mode,
 873                         unsigned int cmd, unsigned long param)
 874 {
 875         struct floppy_state *fs = bdev->bd_disk->private_data;
 876         int err;
 877
 878         if ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))
 879                 return -EPERM;
 880
 881         if (fs->mdev->media_bay &&
 882             check_media_bay(fs->mdev->media_bay) != MB_FD)
 883                 return -ENXIO;
 884
 885         switch (cmd) {
 886         case FDEJECT:
 887                 if (fs->ref_count != 1)
 888                         return -EBUSY;
 889                 err = fd_eject(fs);
 890                 return err;
 891         case FDGETPRM:
 892                 if (copy_to_user((void __user *) param, &floppy_type,
 893                                  sizeof(struct floppy_struct)))
 894                         return -EFAULT;
 895                 return 0;
 896         }
 897         return -ENOTTY;
 898 }
 899
 900 static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
 901                                  unsigned int cmd, unsigned long param)
 902 {
 903         int ret;
 904
 905         mutex_lock(&swim3_mutex);
 906         ret = floppy_locked_ioctl(bdev, mode, cmd, param);
 907         mutex_unlock(&swim3_mutex);
 908
 909         return ret;
 910 }
 911
 912 static int floppy_open(struct block_device *bdev, fmode_t mode)
 913 {
 914         struct floppy_state *fs = bdev->bd_disk->private_data;
 915         struct swim3 __iomem *sw = fs->swim3;
 916         int n, err = 0;
 917
 918         if (fs->ref_count == 0) {
 919                 if (fs->mdev->media_bay &&
 920                     check_media_bay(fs->mdev->media_bay) != MB_FD)
 921                         return -ENXIO;
 922                 out_8(&sw->setup, S_IBM_DRIVE | S_FCLK_DIV2);
 923                 out_8(&sw->control_bic, 0xff);
 924                 out_8(&sw->mode, 0x95);
 925                 udelay(10);
 926                 out_8(&sw->intr_enable, 0);
 927                 out_8(&sw->control_bis, DRIVE_ENABLE | INTR_ENABLE);
 928                 swim3_action(fs, MOTOR_ON);
 929                 fs->write_prot = -1;
 930                 fs->cur_cyl = -1;
 931                 for (n = 0; n < 2 * HZ; ++n) {
 932                         if (n >= HZ/30 && swim3_readbit(fs, SEEK_COMPLETE))
 933                                 break;
 934                         if (signal_pending(current)) {
 935                                 err = -EINTR;
 936                                 break;
 937                         }
 938                         swim3_select(fs, RELAX);
 939                         schedule_timeout_interruptible(1);
 940                 }
 941                 if (err == 0 && (swim3_readbit(fs, SEEK_COMPLETE) == 0
 942                                  || swim3_readbit(fs, DISK_IN) == 0))
 943                         err = -ENXIO;
 944                 swim3_action(fs, SETMFM);
 945                 swim3_select(fs, RELAX);
 946
 947         } else if (fs->ref_count == -1 || mode & FMODE_EXCL)
 948                 return -EBUSY;
 949
 950         if (err == 0 && (mode & FMODE_NDELAY) == 0
 951             && (mode & (FMODE_READ|FMODE_WRITE))) {
 952                 check_disk_change(bdev);
 953                 if (fs->ejected)
 954                         err = -ENXIO;
 955         }
 956
 957         if (err == 0 && (mode & FMODE_WRITE)) {
 958                 if (fs->write_prot < 0)
 959                         fs->write_prot = swim3_readbit(fs, WRITE_PROT);
 960                 if (fs->write_prot)
 961                         err = -EROFS;
 962         }
 963
 964         if (err) {
 965                 if (fs->ref_count == 0) {
 966                         swim3_action(fs, MOTOR_OFF);
 967                         out_8(&sw->control_bic, DRIVE_ENABLE | INTR_ENABLE);
 968                         swim3_select(fs, RELAX);
 969                 }
 970                 return err;
 971         }
 972
 973         if (mode & FMODE_EXCL)
 974                 fs->ref_count = -1;
 975         else
 976                 ++fs->ref_count;
 977
 978         return 0;
 979 }
 980
 981 static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode)
 982 {
 983         int ret;
 984
 985         mutex_lock(&swim3_mutex);
 986         ret = floppy_open(bdev, mode);
 987         mutex_unlock(&swim3_mutex);
 988
 989         return ret;
 990 }
 991
 992 static void floppy_release(struct gendisk *disk, fmode_t mode)
 993 {
 994         struct floppy_state *fs = disk->private_data;
 995         struct swim3 __iomem *sw = fs->swim3;
 996
 997         mutex_lock(&swim3_mutex);
 998         if (fs->ref_count > 0 && --fs->ref_count == 0) {
 999                 swim3_action(fs, MOTOR_OFF);
1000                 out_8(&sw->control_bic, 0xff);
1001                 swim3_select(fs, RELAX);
1002         }
1003         mutex_unlock(&swim3_mutex);
1004 }
1005
1006 static unsigned int floppy_check_events(struct gendisk *disk,
1007                                         unsigned int clearing)
1008 {
1009         struct floppy_state *fs = disk->private_data;
1010         return fs->ejected ? DISK_EVENT_MEDIA_CHANGE : 0;
1011 }
1012
1013 static int floppy_revalidate(struct gendisk *disk)
1014 {
1015         struct floppy_state *fs = disk->private_data;
1016         struct swim3 __iomem *sw;
1017         int ret, n;
1018
1019         if (fs->mdev->media_bay &&
1020             check_media_bay(fs->mdev->media_bay) != MB_FD)
1021                 return -ENXIO;
1022
1023         sw = fs->swim3;
1024         grab_drive(fs, revalidating, 0);
1025         out_8(&sw->intr_enable, 0);
1026         out_8(&sw->control_bis, DRIVE_ENABLE);
1027         swim3_action(fs, MOTOR_ON);     /* necessary? */
1028         fs->write_prot = -1;
1029         fs->cur_cyl = -1;
1030         mdelay(1);
1031         for (n = HZ; n > 0; --n) {
1032                 if (swim3_readbit(fs, SEEK_COMPLETE))
1033                         break;
1034                 if (signal_pending(current))
1035                         break;
1036                 swim3_select(fs, RELAX);
1037                 schedule_timeout_interruptible(1);
1038         }
1039         ret = swim3_readbit(fs, SEEK_COMPLETE) == 0
1040                 || swim3_readbit(fs, DISK_IN) == 0;
1041         if (ret)
1042                 swim3_action(fs, MOTOR_OFF);
1043         else {
1044                 fs->ejected = 0;
1045                 swim3_action(fs, SETMFM);
1046         }
1047         swim3_select(fs, RELAX);
1048
1049         release_drive(fs);
1050         return ret;
1051 }
1052
1053 static const struct block_device_operations floppy_fops = {
1054         .open           = floppy_unlocked_open,
1055         .release        = floppy_release,
1056         .ioctl          = floppy_ioctl,
1057         .check_events   = floppy_check_events,
1058         .revalidate_disk= floppy_revalidate,
1059 };
1060
1061 static const struct blk_mq_ops swim3_mq_ops = {
1062         .queue_rq = swim3_queue_rq,
1063 };
1064
1065 static void swim3_mb_event(struct macio_dev* mdev, int mb_state)
1066 {
1067         struct floppy_state *fs = macio_get_drvdata(mdev);
1068         struct swim3 __iomem *sw;
1069
1070         if (!fs)
1071                 return;
1072
1073         sw = fs->swim3;
1074
1075         if (mb_state != MB_FD)
1076                 return;
1077
1078         /* Clear state */
1079         out_8(&sw->intr_enable, 0);
1080         in_8(&sw->intr);
1081         in_8(&sw->error);
1082 }
1083
1084 static int swim3_add_device(struct macio_dev *mdev, int index)
1085 {
1086         struct device_node *swim = mdev->ofdev.dev.of_node;
1087         struct floppy_state *fs = &floppy_states[index];
1088         int rc = -EBUSY;
1089
1090         /* Do this first for message macros */
1091         memset(fs, 0, sizeof(*fs));
1092         fs->mdev = mdev;
1093         fs->index = index;
1094
1095         /* Check & Request resources */
1096         if (macio_resource_count(mdev) < 2) {
1097                 swim3_err("%s", "No address in device-tree\n");
1098                 return -ENXIO;
1099         }
1100         if (macio_irq_count(mdev) < 1) {
1101                 swim3_err("%s", "No interrupt in device-tree\n");
1102                 return -ENXIO;
1103         }
1104         if (macio_request_resource(mdev, 0, "swim3 (mmio)")) {
1105                 swim3_err("%s", "Can't request mmio resource\n");
1106                 return -EBUSY;
1107         }
1108         if (macio_request_resource(mdev, 1, "swim3 (dma)")) {
1109                 swim3_err("%s", "Can't request dma resource\n");
1110                 macio_release_resource(mdev, 0);
1111                 return -EBUSY;
1112         }
1113         dev_set_drvdata(&mdev->ofdev.dev, fs);
1114
1115         if (mdev->media_bay == NULL)
1116                 pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 1);
1117
1118         fs->state = idle;
1119         fs->swim3 = (struct swim3 __iomem *)
1120                 ioremap(macio_resource_start(mdev, 0), 0x200);
1121         if (fs->swim3 == NULL) {
1122                 swim3_err("%s", "Couldn't map mmio registers\n");
1123                 rc = -ENOMEM;
1124                 goto out_release;
1125         }
1126         fs->dma = (struct dbdma_regs __iomem *)
1127                 ioremap(macio_resource_start(mdev, 1), 0x200);
1128         if (fs->dma == NULL) {
1129                 swim3_err("%s", "Couldn't map dma registers\n");
1130                 iounmap(fs->swim3);
1131                 rc = -ENOMEM;
1132                 goto out_release;
1133         }
1134         fs->swim3_intr = macio_irq(mdev, 0);
1135         fs->dma_intr = macio_irq(mdev, 1);
1136         fs->cur_cyl = -1;
1137         fs->cur_sector = -1;
1138         fs->secpercyl = 36;
1139         fs->secpertrack = 18;
1140         fs->total_secs = 2880;
1141         init_waitqueue_head(&fs->wait);
1142
1143         fs->dma_cmd = (struct dbdma_cmd *) DBDMA_ALIGN(fs->dbdma_cmd_space);
1144         memset(fs->dma_cmd, 0, 2 * sizeof(struct dbdma_cmd));
1145         fs->dma_cmd[1].command = cpu_to_le16(DBDMA_STOP);
1146
1147         if (mdev->media_bay == NULL || check_media_bay(mdev->media_bay) == MB_FD)
1148                 swim3_mb_event(mdev, MB_FD);
1149
1150         if (request_irq(fs->swim3_intr, swim3_interrupt, 0, "SWIM3", fs)) {
1151                 swim3_err("%s", "Couldn't request interrupt\n");
1152                 pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 0);
1153                 goto out_unmap;
1154                 return -EBUSY;
1155         }
1156
1157         timer_setup(&fs->timeout, NULL, 0);
1158
1159         swim3_info("SWIM3 floppy controller %s\n",
1160                 mdev->media_bay ? "in media bay" : "");
1161
1162         return 0;
1163
1164  out_unmap:
1165         iounmap(fs->dma);
1166         iounmap(fs->swim3);
1167
1168  out_release:
1169         macio_release_resource(mdev, 0);
1170         macio_release_resource(mdev, 1);
1171
1172         return rc;
1173 }
1174
1175 static int swim3_attach(struct macio_dev *mdev,
1176                         const struct of_device_id *match)
1177 {
1178         struct floppy_state *fs;
1179         struct gendisk *disk;
1180         int rc;
1181
1182         if (floppy_count >= MAX_FLOPPIES)
1183                 return -ENXIO;
1184
1185         if (floppy_count == 0) {
1186                 rc = register_blkdev(FLOPPY_MAJOR, "fd");
1187                 if (rc)
1188                         return rc;
1189         }
1190
1191         fs = &floppy_states[floppy_count];
1192
1193         disk = alloc_disk(1);
1194         if (disk == NULL) {
1195                 rc = -ENOMEM;
1196                 goto out_unregister;
1197         }
1198
1199         disk->queue = blk_mq_init_sq_queue(&fs->tag_set, &swim3_mq_ops, 2,
1200                                                 BLK_MQ_F_SHOULD_MERGE);
1201         if (IS_ERR(disk->queue)) {
1202                 rc = PTR_ERR(disk->queue);
1203                 disk->queue = NULL;
1204                 goto out_put_disk;
1205         }
1206         blk_queue_bounce_limit(disk->queue, BLK_BOUNCE_HIGH);
1207         disk->queue->queuedata = fs;
1208
1209         rc = swim3_add_device(mdev, floppy_count);
1210         if (rc)
1211                 goto out_cleanup_queue;
1212
1213         disk->major = FLOPPY_MAJOR;
1214         disk->first_minor = floppy_count;
1215         disk->fops = &floppy_fops;
1216         disk->private_data = fs;
1217         disk->flags |= GENHD_FL_REMOVABLE;
1218         sprintf(disk->disk_name, "fd%d", floppy_count);
1219         set_capacity(disk, 2880);
1220         add_disk(disk);
1221
1222         disks[floppy_count++] = disk;
1223         return 0;
1224
1225 out_cleanup_queue:
1226         blk_cleanup_queue(disk->queue);
1227         disk->queue = NULL;
1228         blk_mq_free_tag_set(&fs->tag_set);
1229 out_put_disk:
1230         put_disk(disk);
1231 out_unregister:
1232         if (floppy_count == 0)
1233                 unregister_blkdev(FLOPPY_MAJOR, "fd");
1234         return rc;
1235 }
1236
1237 static const struct of_device_id swim3_match[] =
1238 {
1239         {
1240         .name           = "swim3",
1241         },
1242         {
1243         .compatible     = "ohare-swim3"
1244         },
1245         {
1246         .compatible     = "swim3"
1247         },
1248         { /* end of list */ }
1249 };
1250
1251 static struct macio_driver swim3_driver =
1252 {
1253         .driver = {
1254                 .name           = "swim3",
1255                 .of_match_table = swim3_match,
1256         },
1257         .probe          = swim3_attach,
1258 #ifdef CONFIG_PMAC_MEDIABAY
1259         .mediabay_event = swim3_mb_event,
1260 #endif
1261 #if 0
1262         .suspend        = swim3_suspend,
1263         .resume         = swim3_resume,
1264 #endif
1265 };
1266
1267
1268 int swim3_init(void)
1269 {
1270         macio_register_driver(&swim3_driver);
1271         return 0;
1272 }
1273
1274 module_init(swim3_init)
1275
1276 MODULE_LICENSE("GPL");
1277 MODULE_AUTHOR("Paul Mackerras");
1278 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);