drivers/ide/arm/icside.c

   1 /*
   2  * linux/drivers/ide/arm/icside.c
   3  *
   4  * Copyright (c) 1996-2004 Russell King.
   5  *
   6  * Please note that this platform does not support 32-bit IDE IO.
   7  */
   8
   9 #include <linux/config.h>
  10 #include <linux/string.h>
  11 #include <linux/module.h>
  12 #include <linux/ioport.h>
  13 #include <linux/slab.h>
  14 #include <linux/blkdev.h>
  15 #include <linux/errno.h>
  16 #include <linux/hdreg.h>
  17 #include <linux/ide.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/device.h>
  20 #include <linux/init.h>
  21 #include <linux/scatterlist.h>
  22
  23 #include <asm/dma.h>
  24 #include <asm/ecard.h>
  25 #include <asm/io.h>
  26
  27 #define ICS_IDENT_OFFSET                0x2280
  28
  29 #define ICS_ARCIN_V5_INTRSTAT           0x0000
  30 #define ICS_ARCIN_V5_INTROFFSET         0x0004
  31 #define ICS_ARCIN_V5_IDEOFFSET          0x2800
  32 #define ICS_ARCIN_V5_IDEALTOFFSET       0x2b80
  33 #define ICS_ARCIN_V5_IDESTEPPING        6
  34
  35 #define ICS_ARCIN_V6_IDEOFFSET_1        0x2000
  36 #define ICS_ARCIN_V6_INTROFFSET_1       0x2200
  37 #define ICS_ARCIN_V6_INTRSTAT_1         0x2290
  38 #define ICS_ARCIN_V6_IDEALTOFFSET_1     0x2380
  39 #define ICS_ARCIN_V6_IDEOFFSET_2        0x3000
  40 #define ICS_ARCIN_V6_INTROFFSET_2       0x3200
  41 #define ICS_ARCIN_V6_INTRSTAT_2         0x3290
  42 #define ICS_ARCIN_V6_IDEALTOFFSET_2     0x3380
  43 #define ICS_ARCIN_V6_IDESTEPPING        6
  44
  45 struct cardinfo {
  46         unsigned int dataoffset;
  47         unsigned int ctrloffset;
  48         unsigned int stepping;
  49 };
  50
  51 static struct cardinfo icside_cardinfo_v5 = {
  52         .dataoffset     = ICS_ARCIN_V5_IDEOFFSET,
  53         .ctrloffset     = ICS_ARCIN_V5_IDEALTOFFSET,
  54         .stepping       = ICS_ARCIN_V5_IDESTEPPING,
  55 };
  56
  57 static struct cardinfo icside_cardinfo_v6_1 = {
  58         .dataoffset     = ICS_ARCIN_V6_IDEOFFSET_1,
  59         .ctrloffset     = ICS_ARCIN_V6_IDEALTOFFSET_1,
  60         .stepping       = ICS_ARCIN_V6_IDESTEPPING,
  61 };
  62
  63 static struct cardinfo icside_cardinfo_v6_2 = {
  64         .dataoffset     = ICS_ARCIN_V6_IDEOFFSET_2,
  65         .ctrloffset     = ICS_ARCIN_V6_IDEALTOFFSET_2,
  66         .stepping       = ICS_ARCIN_V6_IDESTEPPING,
  67 };
  68
  69 struct icside_state {
  70         unsigned int channel;
  71         unsigned int enabled;
  72         void __iomem *irq_port;
  73         void __iomem *ioc_base;
  74         unsigned int type;
  75         /* parent device... until the IDE core gets one of its own */
  76         struct device *dev;
  77         ide_hwif_t *hwif[2];
  78 };
  79
  80 #define ICS_TYPE_A3IN   0
  81 #define ICS_TYPE_A3USER 1
  82 #define ICS_TYPE_V6     3
  83 #define ICS_TYPE_V5     15
  84 #define ICS_TYPE_NOTYPE ((unsigned int)-1)
  85
  86 /* ---------------- Version 5 PCB Support Functions --------------------- */
  87 /* Prototype: icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
  88  * Purpose  : enable interrupts from card
  89  */
  90 static void icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
  91 {
  92         struct icside_state *state = ec->irq_data;
  93
  94         writeb(0, state->irq_port + ICS_ARCIN_V5_INTROFFSET);
  95 }
  96
  97 /* Prototype: icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
  98  * Purpose  : disable interrupts from card
  99  */
 100 static void icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
 101 {
 102         struct icside_state *state = ec->irq_data;
 103
 104         readb(state->irq_port + ICS_ARCIN_V5_INTROFFSET);
 105 }
 106
 107 static const expansioncard_ops_t icside_ops_arcin_v5 = {
 108         .irqenable      = icside_irqenable_arcin_v5,
 109         .irqdisable     = icside_irqdisable_arcin_v5,
 110 };
 111
 112
 113 /* ---------------- Version 6 PCB Support Functions --------------------- */
 114 /* Prototype: icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
 115  * Purpose  : enable interrupts from card
 116  */
 117 static void icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
 118 {
 119         struct icside_state *state = ec->irq_data;
 120         void __iomem *base = state->irq_port;
 121
 122         state->enabled = 1;
 123
 124         switch (state->channel) {
 125         case 0:
 126                 writeb(0, base + ICS_ARCIN_V6_INTROFFSET_1);
 127                 readb(base + ICS_ARCIN_V6_INTROFFSET_2);
 128                 break;
 129         case 1:
 130                 writeb(0, base + ICS_ARCIN_V6_INTROFFSET_2);
 131                 readb(base + ICS_ARCIN_V6_INTROFFSET_1);
 132                 break;
 133         }
 134 }
 135
 136 /* Prototype: icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
 137  * Purpose  : disable interrupts from card
 138  */
 139 static void icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
 140 {
 141         struct icside_state *state = ec->irq_data;
 142
 143         state->enabled = 0;
 144
 145         readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
 146         readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
 147 }
 148
 149 /* Prototype: icside_irqprobe(struct expansion_card *ec)
 150  * Purpose  : detect an active interrupt from card
 151  */
 152 static int icside_irqpending_arcin_v6(struct expansion_card *ec)
 153 {
 154         struct icside_state *state = ec->irq_data;
 155
 156         return readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_1) & 1 ||
 157                readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_2) & 1;
 158 }
 159
 160 static const expansioncard_ops_t icside_ops_arcin_v6 = {
 161         .irqenable      = icside_irqenable_arcin_v6,
 162         .irqdisable     = icside_irqdisable_arcin_v6,
 163         .irqpending     = icside_irqpending_arcin_v6,
 164 };
 165
 166 /*
 167  * Handle routing of interrupts.  This is called before
 168  * we write the command to the drive.
 169  */
 170 static void icside_maskproc(ide_drive_t *drive, int mask)
 171 {
 172         ide_hwif_t *hwif = HWIF(drive);
 173         struct icside_state *state = hwif->hwif_data;
 174         unsigned long flags;
 175
 176         local_irq_save(flags);
 177
 178         state->channel = hwif->channel;
 179
 180         if (state->enabled && !mask) {
 181                 switch (hwif->channel) {
 182                 case 0:
 183                         writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
 184                         readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
 185                         break;
 186                 case 1:
 187                         writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
 188                         readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
 189                         break;
 190                 }
 191         } else {
 192                 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
 193                 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
 194         }
 195
 196         local_irq_restore(flags);
 197 }
 198
 199 #ifdef CONFIG_BLK_DEV_IDEDMA_ICS
 200
 201 #ifndef CONFIG_IDEDMA_ICS_AUTO
 202 #warning CONFIG_IDEDMA_ICS_AUTO=n support is obsolete, and will be removed soon.
 203 #endif
 204
 205 /*
 206  * SG-DMA support.
 207  *
 208  * Similar to the BM-DMA, but we use the RiscPCs IOMD DMA controllers.
 209  * There is only one DMA controller per card, which means that only
 210  * one drive can be accessed at one time.  NOTE! We do not enforce that
 211  * here, but we rely on the main IDE driver spotting that both
 212  * interfaces use the same IRQ, which should guarantee this.
 213  */
 214
 215 static void icside_build_sglist(ide_drive_t *drive, struct request *rq)
 216 {
 217         ide_hwif_t *hwif = drive->hwif;
 218         struct icside_state *state = hwif->hwif_data;
 219         struct scatterlist *sg = hwif->sg_table;
 220
 221         ide_map_sg(drive, rq);
 222
 223         if (rq_data_dir(rq) == READ)
 224                 hwif->sg_dma_direction = DMA_FROM_DEVICE;
 225         else
 226                 hwif->sg_dma_direction = DMA_TO_DEVICE;
 227
 228         hwif->sg_nents = dma_map_sg(state->dev, sg, hwif->sg_nents,
 229                                     hwif->sg_dma_direction);
 230 }
 231
 232 /*
 233  * Configure the IOMD to give the appropriate timings for the transfer
 234  * mode being requested.  We take the advice of the ATA standards, and
 235  * calculate the cycle time based on the transfer mode, and the EIDE
 236  * MW DMA specs that the drive provides in the IDENTIFY command.
 237  *
 238  * We have the following IOMD DMA modes to choose from:
 239  *
 240  *      Type    Active          Recovery        Cycle
 241  *      A       250 (250)       312 (550)       562 (800)
 242  *      B       187             250             437
 243  *      C       125 (125)       125 (375)       250 (500)
 244  *      D       62              125             187
 245  *
 246  * (figures in brackets are actual measured timings)
 247  *
 248  * However, we also need to take care of the read/write active and
 249  * recovery timings:
 250  *
 251  *                      Read    Write
 252  *      Mode    Active  -- Recovery --  Cycle   IOMD type
 253  *      MW0     215     50      215     480     A
 254  *      MW1     80      50      50      150     C
 255  *      MW2     70      25      25      120     C
 256  */
 257 static int icside_set_speed(ide_drive_t *drive, u8 xfer_mode)
 258 {
 259         int on = 0, cycle_time = 0, use_dma_info = 0;
 260
 261         /*
 262          * Limit the transfer speed to MW_DMA_2.
 263          */
 264         if (xfer_mode > XFER_MW_DMA_2)
 265                 xfer_mode = XFER_MW_DMA_2;
 266
 267         switch (xfer_mode) {
 268         case XFER_MW_DMA_2:
 269                 cycle_time = 250;
 270                 use_dma_info = 1;
 271                 break;
 272
 273         case XFER_MW_DMA_1:
 274                 cycle_time = 250;
 275                 use_dma_info = 1;
 276                 break;
 277
 278         case XFER_MW_DMA_0:
 279                 cycle_time = 480;
 280                 break;
 281
 282         case XFER_SW_DMA_2:
 283         case XFER_SW_DMA_1:
 284         case XFER_SW_DMA_0:
 285                 cycle_time = 480;
 286                 break;
 287         }
 288
 289         /*
 290          * If we're going to be doing MW_DMA_1 or MW_DMA_2, we should
 291          * take care to note the values in the ID...
 292          */
 293         if (use_dma_info && drive->id->eide_dma_time > cycle_time)
 294                 cycle_time = drive->id->eide_dma_time;
 295
 296         drive->drive_data = cycle_time;
 297
 298         if (cycle_time && ide_config_drive_speed(drive, xfer_mode) == 0)
 299                 on = 1;
 300         else
 301                 drive->drive_data = 480;
 302
 303         printk("%s: %s selected (peak %dMB/s)\n", drive->name,
 304                 ide_xfer_verbose(xfer_mode), 2000 / drive->drive_data);
 305
 306         drive->current_speed = xfer_mode;
 307
 308         return on;
 309 }
 310
 311 static int icside_dma_host_off(ide_drive_t *drive)
 312 {
 313         return 0;
 314 }
 315
 316 static int icside_dma_off_quietly(ide_drive_t *drive)
 317 {
 318         drive->using_dma = 0;
 319         return icside_dma_host_off(drive);
 320 }
 321
 322 static int icside_dma_host_on(ide_drive_t *drive)
 323 {
 324         return 0;
 325 }
 326
 327 static int icside_dma_on(ide_drive_t *drive)
 328 {
 329         drive->using_dma = 1;
 330         return icside_dma_host_on(drive);
 331 }
 332
 333 static int icside_dma_check(ide_drive_t *drive)
 334 {
 335         struct hd_driveid *id = drive->id;
 336         ide_hwif_t *hwif = HWIF(drive);
 337         int xfer_mode = XFER_PIO_2;
 338         int on;
 339
 340         if (!(id->capability & 1) || !hwif->autodma)
 341                 goto out;
 342
 343         /*
 344          * Consult the list of known "bad" drives
 345          */
 346         if (__ide_dma_bad_drive(drive))
 347                 goto out;
 348
 349         /*
 350          * Enable DMA on any drive that has multiword DMA
 351          */
 352         if (id->field_valid & 2) {
 353                 xfer_mode = ide_dma_speed(drive, 0);
 354                 goto out;
 355         }
 356
 357         /*
 358          * Consult the list of known "good" drives
 359          */
 360         if (__ide_dma_good_drive(drive)) {
 361                 if (id->eide_dma_time > 150)
 362                         goto out;
 363                 xfer_mode = XFER_MW_DMA_1;
 364         }
 365
 366 out:
 367         on = icside_set_speed(drive, xfer_mode);
 368
 369         if (on)
 370                 return icside_dma_on(drive);
 371         else
 372                 return icside_dma_off_quietly(drive);
 373 }
 374
 375 static int icside_dma_end(ide_drive_t *drive)
 376 {
 377         ide_hwif_t *hwif = HWIF(drive);
 378         struct icside_state *state = hwif->hwif_data;
 379
 380         drive->waiting_for_dma = 0;
 381
 382         disable_dma(hwif->hw.dma);
 383
 384         /* Teardown mappings after DMA has completed. */
 385         dma_unmap_sg(state->dev, hwif->sg_table, hwif->sg_nents,
 386                      hwif->sg_dma_direction);
 387
 388         return get_dma_residue(hwif->hw.dma) != 0;
 389 }
 390
 391 static void icside_dma_start(ide_drive_t *drive)
 392 {
 393         ide_hwif_t *hwif = HWIF(drive);
 394
 395         /* We can not enable DMA on both channels simultaneously. */
 396         BUG_ON(dma_channel_active(hwif->hw.dma));
 397         enable_dma(hwif->hw.dma);
 398 }
 399
 400 static int icside_dma_setup(ide_drive_t *drive)
 401 {
 402         ide_hwif_t *hwif = HWIF(drive);
 403         struct request *rq = hwif->hwgroup->rq;
 404         unsigned int dma_mode;
 405
 406         if (rq_data_dir(rq))
 407                 dma_mode = DMA_MODE_WRITE;
 408         else
 409                 dma_mode = DMA_MODE_READ;
 410
 411         /*
 412          * We can not enable DMA on both channels.
 413          */
 414         BUG_ON(dma_channel_active(hwif->hw.dma));
 415
 416         icside_build_sglist(drive, rq);
 417
 418         /*
 419          * Ensure that we have the right interrupt routed.
 420          */
 421         icside_maskproc(drive, 0);
 422
 423         /*
 424          * Route the DMA signals to the correct interface.
 425          */
 426         writeb(hwif->select_data, hwif->config_data);
 427
 428         /*
 429          * Select the correct timing for this drive.
 430          */
 431         set_dma_speed(hwif->hw.dma, drive->drive_data);
 432
 433         /*
 434          * Tell the DMA engine about the SG table and
 435          * data direction.
 436          */
 437         set_dma_sg(hwif->hw.dma, hwif->sg_table, hwif->sg_nents);
 438         set_dma_mode(hwif->hw.dma, dma_mode);
 439
 440         drive->waiting_for_dma = 1;
 441
 442         return 0;
 443 }
 444
 445 static void icside_dma_exec_cmd(ide_drive_t *drive, u8 cmd)
 446 {
 447         /* issue cmd to drive */
 448         ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD, NULL);
 449 }
 450
 451 static int icside_dma_test_irq(ide_drive_t *drive)
 452 {
 453         ide_hwif_t *hwif = HWIF(drive);
 454         struct icside_state *state = hwif->hwif_data;
 455
 456         return readb(state->irq_port +
 457                      (hwif->channel ?
 458                         ICS_ARCIN_V6_INTRSTAT_2 :
 459                         ICS_ARCIN_V6_INTRSTAT_1)) & 1;
 460 }
 461
 462 static int icside_dma_timeout(ide_drive_t *drive)
 463 {
 464         printk(KERN_ERR "%s: DMA timeout occurred: ", drive->name);
 465
 466         if (icside_dma_test_irq(drive))
 467                 return 0;
 468
 469         ide_dump_status(drive, "DMA timeout",
 470                 HWIF(drive)->INB(IDE_STATUS_REG));
 471
 472         return icside_dma_end(drive);
 473 }
 474
 475 static int icside_dma_lostirq(ide_drive_t *drive)
 476 {
 477         printk(KERN_ERR "%s: IRQ lost\n", drive->name);
 478         return 1;
 479 }
 480
 481 static void icside_dma_init(ide_hwif_t *hwif)
 482 {
 483         int autodma = 0;
 484
 485 #ifdef CONFIG_IDEDMA_ICS_AUTO
 486         autodma = 1;
 487 #endif
 488
 489         printk("    %s: SG-DMA", hwif->name);
 490
 491         hwif->atapi_dma         = 1;
 492         hwif->mwdma_mask        = 7; /* MW0..2 */
 493         hwif->swdma_mask        = 7; /* SW0..2 */
 494
 495         hwif->dmatable_cpu      = NULL;
 496         hwif->dmatable_dma      = 0;
 497         hwif->speedproc         = icside_set_speed;
 498         hwif->autodma           = autodma;
 499
 500         hwif->ide_dma_check     = icside_dma_check;
 501         hwif->ide_dma_host_off  = icside_dma_host_off;
 502         hwif->ide_dma_off_quietly = icside_dma_off_quietly;
 503         hwif->ide_dma_host_on   = icside_dma_host_on;
 504         hwif->ide_dma_on        = icside_dma_on;
 505         hwif->dma_setup         = icside_dma_setup;
 506         hwif->dma_exec_cmd      = icside_dma_exec_cmd;
 507         hwif->dma_start         = icside_dma_start;
 508         hwif->ide_dma_end       = icside_dma_end;
 509         hwif->ide_dma_test_irq  = icside_dma_test_irq;
 510         hwif->ide_dma_timeout   = icside_dma_timeout;
 511         hwif->ide_dma_lostirq   = icside_dma_lostirq;
 512
 513         hwif->drives[0].autodma = hwif->autodma;
 514         hwif->drives[1].autodma = hwif->autodma;
 515
 516         printk(" capable%s\n", hwif->autodma ? ", auto-enable" : "");
 517 }
 518 #else
 519 #define icside_dma_init(hwif)   (0)
 520 #endif
 521
 522 static ide_hwif_t *icside_find_hwif(unsigned long dataport)
 523 {
 524         ide_hwif_t *hwif;
 525         int index;
 526
 527         for (index = 0; index < MAX_HWIFS; ++index) {
 528                 hwif = &ide_hwifs[index];
 529                 if (hwif->io_ports[IDE_DATA_OFFSET] == dataport)
 530                         goto found;
 531         }
 532
 533         for (index = 0; index < MAX_HWIFS; ++index) {
 534                 hwif = &ide_hwifs[index];
 535                 if (!hwif->io_ports[IDE_DATA_OFFSET])
 536                         goto found;
 537         }
 538
 539         hwif = NULL;
 540 found:
 541         return hwif;
 542 }
 543
 544 static ide_hwif_t *
 545 icside_setup(void __iomem *base, struct cardinfo *info, struct expansion_card *ec)
 546 {
 547         unsigned long port = (unsigned long)base + info->dataoffset;
 548         ide_hwif_t *hwif;
 549
 550         hwif = icside_find_hwif(port);
 551         if (hwif) {
 552                 int i;
 553
 554                 memset(&hwif->hw, 0, sizeof(hw_regs_t));
 555
 556                 /*
 557                  * Ensure we're using MMIO
 558                  */
 559                 default_hwif_mmiops(hwif);
 560                 hwif->mmio = 2;
 561
 562                 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 563                         hwif->hw.io_ports[i] = port;
 564                         hwif->io_ports[i] = port;
 565                         port += 1 << info->stepping;
 566                 }
 567                 hwif->hw.io_ports[IDE_CONTROL_OFFSET] = (unsigned long)base + info->ctrloffset;
 568                 hwif->io_ports[IDE_CONTROL_OFFSET] = (unsigned long)base + info->ctrloffset;
 569                 hwif->hw.irq  = ec->irq;
 570                 hwif->irq     = ec->irq;
 571                 hwif->noprobe = 0;
 572                 hwif->chipset = ide_acorn;
 573                 hwif->gendev.parent = &ec->dev;
 574         }
 575
 576         return hwif;
 577 }
 578
 579 static int __init
 580 icside_register_v5(struct icside_state *state, struct expansion_card *ec)
 581 {
 582         ide_hwif_t *hwif;
 583         void __iomem *base;
 584
 585         base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
 586                        ecard_resource_len(ec, ECARD_RES_MEMC));
 587         if (!base)
 588                 return -ENOMEM;
 589
 590         state->irq_port = base;
 591
 592         ec->irqaddr  = base + ICS_ARCIN_V5_INTRSTAT;
 593         ec->irqmask  = 1;
 594         ec->irq_data = state;
 595         ec->ops      = &icside_ops_arcin_v5;
 596
 597         /*
 598          * Be on the safe side - disable interrupts
 599          */
 600         icside_irqdisable_arcin_v5(ec, 0);
 601
 602         hwif = icside_setup(base, &icside_cardinfo_v5, ec);
 603         if (!hwif) {
 604                 iounmap(base);
 605                 return -ENODEV;
 606         }
 607
 608         state->hwif[0] = hwif;
 609
 610         probe_hwif_init(hwif);
 611         create_proc_ide_interfaces();
 612
 613         return 0;
 614 }
 615
 616 static int __init
 617 icside_register_v6(struct icside_state *state, struct expansion_card *ec)
 618 {
 619         ide_hwif_t *hwif, *mate;
 620         void __iomem *ioc_base, *easi_base;
 621         unsigned int sel = 0;
 622         int ret;
 623
 624         ioc_base = ioremap(ecard_resource_start(ec, ECARD_RES_IOCFAST),
 625                            ecard_resource_len(ec, ECARD_RES_IOCFAST));
 626         if (!ioc_base) {
 627                 ret = -ENOMEM;
 628                 goto out;
 629         }
 630
 631         easi_base = ioc_base;
 632
 633         if (ecard_resource_flags(ec, ECARD_RES_EASI)) {
 634                 easi_base = ioremap(ecard_resource_start(ec, ECARD_RES_EASI),
 635                                     ecard_resource_len(ec, ECARD_RES_EASI));
 636                 if (!easi_base) {
 637                         ret = -ENOMEM;
 638                         goto unmap_slot;
 639                 }
 640
 641                 /*
 642                  * Enable access to the EASI region.
 643                  */
 644                 sel = 1 << 5;
 645         }
 646
 647         writeb(sel, ioc_base);
 648
 649         ec->irq_data      = state;
 650         ec->ops           = &icside_ops_arcin_v6;
 651
 652         state->irq_port   = easi_base;
 653         state->ioc_base   = ioc_base;
 654
 655         /*
 656          * Be on the safe side - disable interrupts
 657          */
 658         icside_irqdisable_arcin_v6(ec, 0);
 659
 660         /*
 661          * Find and register the interfaces.
 662          */
 663         hwif = icside_setup(easi_base, &icside_cardinfo_v6_1, ec);
 664         mate = icside_setup(easi_base, &icside_cardinfo_v6_2, ec);
 665
 666         if (!hwif || !mate) {
 667                 ret = -ENODEV;
 668                 goto unmap_port;
 669         }
 670
 671         state->hwif[0]    = hwif;
 672         state->hwif[1]    = mate;
 673
 674         hwif->maskproc    = icside_maskproc;
 675         hwif->channel     = 0;
 676         hwif->hwif_data   = state;
 677         hwif->mate        = mate;
 678         hwif->serialized  = 1;
 679         hwif->config_data = (unsigned long)ioc_base;
 680         hwif->select_data = sel;
 681         hwif->hw.dma      = ec->dma;
 682
 683         mate->maskproc    = icside_maskproc;
 684         mate->channel     = 1;
 685         mate->hwif_data   = state;
 686         mate->mate        = hwif;
 687         mate->serialized  = 1;
 688         mate->config_data = (unsigned long)ioc_base;
 689         mate->select_data = sel | 1;
 690         mate->hw.dma      = ec->dma;
 691
 692         if (ec->dma != NO_DMA && !request_dma(ec->dma, hwif->name)) {
 693                 icside_dma_init(hwif);
 694                 icside_dma_init(mate);
 695         }
 696
 697         probe_hwif_init(hwif);
 698         probe_hwif_init(mate);
 699         create_proc_ide_interfaces();
 700
 701         return 0;
 702
 703  unmap_port:
 704         if (easi_base != ioc_base)
 705                 iounmap(easi_base);
 706  unmap_slot:
 707         iounmap(ioc_base);
 708  out:
 709         return ret;
 710 }
 711
 712 static int __devinit
 713 icside_probe(struct expansion_card *ec, const struct ecard_id *id)
 714 {
 715         struct icside_state *state;
 716         void __iomem *idmem;
 717         int ret;
 718
 719         ret = ecard_request_resources(ec);
 720         if (ret)
 721                 goto out;
 722
 723         state = kmalloc(sizeof(struct icside_state), GFP_KERNEL);
 724         if (!state) {
 725                 ret = -ENOMEM;
 726                 goto release;
 727         }
 728
 729         memset(state, 0, sizeof(state));
 730         state->type     = ICS_TYPE_NOTYPE;
 731         state->dev      = &ec->dev;
 732
 733         idmem = ioremap(ecard_resource_start(ec, ECARD_RES_IOCFAST),
 734                         ecard_resource_len(ec, ECARD_RES_IOCFAST));
 735         if (idmem) {
 736                 unsigned int type;
 737
 738                 type = readb(idmem + ICS_IDENT_OFFSET) & 1;
 739                 type |= (readb(idmem + ICS_IDENT_OFFSET + 4) & 1) << 1;
 740                 type |= (readb(idmem + ICS_IDENT_OFFSET + 8) & 1) << 2;
 741                 type |= (readb(idmem + ICS_IDENT_OFFSET + 12) & 1) << 3;
 742                 iounmap(idmem);
 743
 744                 state->type = type;
 745         }
 746
 747         switch (state->type) {
 748         case ICS_TYPE_A3IN:
 749                 dev_warn(&ec->dev, "A3IN unsupported\n");
 750                 ret = -ENODEV;
 751                 break;
 752
 753         case ICS_TYPE_A3USER:
 754                 dev_warn(&ec->dev, "A3USER unsupported\n");
 755                 ret = -ENODEV;
 756                 break;
 757
 758         case ICS_TYPE_V5:
 759                 ret = icside_register_v5(state, ec);
 760                 break;
 761
 762         case ICS_TYPE_V6:
 763                 ret = icside_register_v6(state, ec);
 764                 break;
 765
 766         default:
 767                 dev_warn(&ec->dev, "unknown interface type\n");
 768                 ret = -ENODEV;
 769                 break;
 770         }
 771
 772         if (ret == 0) {
 773                 ecard_set_drvdata(ec, state);
 774                 goto out;
 775         }
 776
 777         kfree(state);
 778  release:
 779         ecard_release_resources(ec);
 780  out:
 781         return ret;
 782 }
 783
 784 static void __devexit icside_remove(struct expansion_card *ec)
 785 {
 786         struct icside_state *state = ecard_get_drvdata(ec);
 787
 788         switch (state->type) {
 789         case ICS_TYPE_V5:
 790                 /* FIXME: tell IDE to stop using the interface */
 791
 792                 /* Disable interrupts */
 793                 icside_irqdisable_arcin_v5(ec, 0);
 794                 break;
 795
 796         case ICS_TYPE_V6:
 797                 /* FIXME: tell IDE to stop using the interface */
 798                 if (ec->dma != NO_DMA)
 799                         free_dma(ec->dma);
 800
 801                 /* Disable interrupts */
 802                 icside_irqdisable_arcin_v6(ec, 0);
 803
 804                 /* Reset the ROM pointer/EASI selection */
 805                 writeb(0, state->ioc_base);
 806                 break;
 807         }
 808
 809         ecard_set_drvdata(ec, NULL);
 810         ec->ops = NULL;
 811         ec->irq_data = NULL;
 812
 813         if (state->ioc_base)
 814                 iounmap(state->ioc_base);
 815         if (state->ioc_base != state->irq_port)
 816                 iounmap(state->irq_port);
 817
 818         kfree(state);
 819         ecard_release_resources(ec);
 820 }
 821
 822 static void icside_shutdown(struct expansion_card *ec)
 823 {
 824         struct icside_state *state = ecard_get_drvdata(ec);
 825         unsigned long flags;
 826
 827         /*
 828          * Disable interrupts from this card.  We need to do
 829          * this before disabling EASI since we may be accessing
 830          * this register via that region.
 831          */
 832         local_irq_save(flags);
 833         ec->ops->irqdisable(ec, 0);
 834         local_irq_restore(flags);
 835
 836         /*
 837          * Reset the ROM pointer so that we can read the ROM
 838          * after a soft reboot.  This also disables access to
 839          * the IDE taskfile via the EASI region.
 840          */
 841         if (state->ioc_base)
 842                 writeb(0, state->ioc_base);
 843 }
 844
 845 static const struct ecard_id icside_ids[] = {
 846         { MANU_ICS,  PROD_ICS_IDE  },
 847         { MANU_ICS2, PROD_ICS2_IDE },
 848         { 0xffff, 0xffff }
 849 };
 850
 851 static struct ecard_driver icside_driver = {
 852         .probe          = icside_probe,
 853         .remove         = __devexit_p(icside_remove),
 854         .shutdown       = icside_shutdown,
 855         .id_table       = icside_ids,
 856         .drv = {
 857                 .name   = "icside",
 858         },
 859 };
 860
 861 static int __init icside_init(void)
 862 {
 863         return ecard_register_driver(&icside_driver);
 864 }
 865
 866 MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
 867 MODULE_LICENSE("GPL");
 868 MODULE_DESCRIPTION("ICS IDE driver");
 869
 870 module_init(icside_init);