drivers/ide/icside.c

   1 /*
   2  * Copyright (c) 1996-2004 Russell King.
   3  *
   4  * Please note that this platform does not support 32-bit IDE IO.
   5  */
   6
   7 #include <linux/string.h>
   8 #include <linux/module.h>
   9 #include <linux/ioport.h>
  10 #include <linux/slab.h>
  11 #include <linux/blkdev.h>
  12 #include <linux/errno.h>
  13 #include <linux/ide.h>
  14 #include <linux/dma-mapping.h>
  15 #include <linux/device.h>
  16 #include <linux/init.h>
  17 #include <linux/scatterlist.h>
  18 #include <linux/io.h>
  19
  20 #include <asm/dma.h>
  21 #include <asm/ecard.h>
  22
  23 #define DRV_NAME "icside"
  24
  25 #define ICS_IDENT_OFFSET                0x2280
  26
  27 #define ICS_ARCIN_V5_INTRSTAT           0x0000
  28 #define ICS_ARCIN_V5_INTROFFSET         0x0004
  29 #define ICS_ARCIN_V5_IDEOFFSET          0x2800
  30 #define ICS_ARCIN_V5_IDEALTOFFSET       0x2b80
  31 #define ICS_ARCIN_V5_IDESTEPPING        6
  32
  33 #define ICS_ARCIN_V6_IDEOFFSET_1        0x2000
  34 #define ICS_ARCIN_V6_INTROFFSET_1       0x2200
  35 #define ICS_ARCIN_V6_INTRSTAT_1         0x2290
  36 #define ICS_ARCIN_V6_IDEALTOFFSET_1     0x2380
  37 #define ICS_ARCIN_V6_IDEOFFSET_2        0x3000
  38 #define ICS_ARCIN_V6_INTROFFSET_2       0x3200
  39 #define ICS_ARCIN_V6_INTRSTAT_2         0x3290
  40 #define ICS_ARCIN_V6_IDEALTOFFSET_2     0x3380
  41 #define ICS_ARCIN_V6_IDESTEPPING        6
  42
  43 struct cardinfo {
  44         unsigned int dataoffset;
  45         unsigned int ctrloffset;
  46         unsigned int stepping;
  47 };
  48
  49 static struct cardinfo icside_cardinfo_v5 = {
  50         .dataoffset     = ICS_ARCIN_V5_IDEOFFSET,
  51         .ctrloffset     = ICS_ARCIN_V5_IDEALTOFFSET,
  52         .stepping       = ICS_ARCIN_V5_IDESTEPPING,
  53 };
  54
  55 static struct cardinfo icside_cardinfo_v6_1 = {
  56         .dataoffset     = ICS_ARCIN_V6_IDEOFFSET_1,
  57         .ctrloffset     = ICS_ARCIN_V6_IDEALTOFFSET_1,
  58         .stepping       = ICS_ARCIN_V6_IDESTEPPING,
  59 };
  60
  61 static struct cardinfo icside_cardinfo_v6_2 = {
  62         .dataoffset     = ICS_ARCIN_V6_IDEOFFSET_2,
  63         .ctrloffset     = ICS_ARCIN_V6_IDEALTOFFSET_2,
  64         .stepping       = ICS_ARCIN_V6_IDESTEPPING,
  65 };
  66
  67 struct icside_state {
  68         unsigned int channel;
  69         unsigned int enabled;
  70         void __iomem *irq_port;
  71         void __iomem *ioc_base;
  72         unsigned int sel;
  73         unsigned int type;
  74         struct ide_host *host;
  75 };
  76
  77 #define ICS_TYPE_A3IN   0
  78 #define ICS_TYPE_A3USER 1
  79 #define ICS_TYPE_V6     3
  80 #define ICS_TYPE_V5     15
  81 #define ICS_TYPE_NOTYPE ((unsigned int)-1)
  82
  83 /* ---------------- Version 5 PCB Support Functions --------------------- */
  84 /* Prototype: icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
  85  * Purpose  : enable interrupts from card
  86  */
  87 static void icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
  88 {
  89         struct icside_state *state = ec->irq_data;
  90
  91         writeb(0, state->irq_port + ICS_ARCIN_V5_INTROFFSET);
  92 }
  93
  94 /* Prototype: icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
  95  * Purpose  : disable interrupts from card
  96  */
  97 static void icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
  98 {
  99         struct icside_state *state = ec->irq_data;
 100
 101         readb(state->irq_port + ICS_ARCIN_V5_INTROFFSET);
 102 }
 103
 104 static const expansioncard_ops_t icside_ops_arcin_v5 = {
 105         .irqenable      = icside_irqenable_arcin_v5,
 106         .irqdisable     = icside_irqdisable_arcin_v5,
 107 };
 108
 109
 110 /* ---------------- Version 6 PCB Support Functions --------------------- */
 111 /* Prototype: icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
 112  * Purpose  : enable interrupts from card
 113  */
 114 static void icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
 115 {
 116         struct icside_state *state = ec->irq_data;
 117         void __iomem *base = state->irq_port;
 118
 119         state->enabled = 1;
 120
 121         switch (state->channel) {
 122         case 0:
 123                 writeb(0, base + ICS_ARCIN_V6_INTROFFSET_1);
 124                 readb(base + ICS_ARCIN_V6_INTROFFSET_2);
 125                 break;
 126         case 1:
 127                 writeb(0, base + ICS_ARCIN_V6_INTROFFSET_2);
 128                 readb(base + ICS_ARCIN_V6_INTROFFSET_1);
 129                 break;
 130         }
 131 }
 132
 133 /* Prototype: icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
 134  * Purpose  : disable interrupts from card
 135  */
 136 static void icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
 137 {
 138         struct icside_state *state = ec->irq_data;
 139
 140         state->enabled = 0;
 141
 142         readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
 143         readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
 144 }
 145
 146 /* Prototype: icside_irqprobe(struct expansion_card *ec)
 147  * Purpose  : detect an active interrupt from card
 148  */
 149 static int icside_irqpending_arcin_v6(struct expansion_card *ec)
 150 {
 151         struct icside_state *state = ec->irq_data;
 152
 153         return readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_1) & 1 ||
 154                readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_2) & 1;
 155 }
 156
 157 static const expansioncard_ops_t icside_ops_arcin_v6 = {
 158         .irqenable      = icside_irqenable_arcin_v6,
 159         .irqdisable     = icside_irqdisable_arcin_v6,
 160         .irqpending     = icside_irqpending_arcin_v6,
 161 };
 162
 163 /*
 164  * Handle routing of interrupts.  This is called before
 165  * we write the command to the drive.
 166  */
 167 static void icside_maskproc(ide_drive_t *drive, int mask)
 168 {
 169         ide_hwif_t *hwif = drive->hwif;
 170         struct expansion_card *ec = ECARD_DEV(hwif->dev);
 171         struct icside_state *state = ecard_get_drvdata(ec);
 172         unsigned long flags;
 173
 174         local_irq_save(flags);
 175
 176         state->channel = hwif->channel;
 177
 178         if (state->enabled && !mask) {
 179                 switch (hwif->channel) {
 180                 case 0:
 181                         writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
 182                         readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
 183                         break;
 184                 case 1:
 185                         writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
 186                         readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
 187                         break;
 188                 }
 189         } else {
 190                 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
 191                 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
 192         }
 193
 194         local_irq_restore(flags);
 195 }
 196
 197 static const struct ide_port_ops icside_v6_no_dma_port_ops = {
 198         .maskproc               = icside_maskproc,
 199 };
 200
 201 #ifdef CONFIG_BLK_DEV_IDEDMA_ICS
 202 /*
 203  * SG-DMA support.
 204  *
 205  * Similar to the BM-DMA, but we use the RiscPCs IOMD DMA controllers.
 206  * There is only one DMA controller per card, which means that only
 207  * one drive can be accessed at one time.  NOTE! We do not enforce that
 208  * here, but we rely on the main IDE driver spotting that both
 209  * interfaces use the same IRQ, which should guarantee this.
 210  */
 211
 212 /*
 213  * Configure the IOMD to give the appropriate timings for the transfer
 214  * mode being requested.  We take the advice of the ATA standards, and
 215  * calculate the cycle time based on the transfer mode, and the EIDE
 216  * MW DMA specs that the drive provides in the IDENTIFY command.
 217  *
 218  * We have the following IOMD DMA modes to choose from:
 219  *
 220  *      Type    Active          Recovery        Cycle
 221  *      A       250 (250)       312 (550)       562 (800)
 222  *      B       187             250             437
 223  *      C       125 (125)       125 (375)       250 (500)
 224  *      D       62              125             187
 225  *
 226  * (figures in brackets are actual measured timings)
 227  *
 228  * However, we also need to take care of the read/write active and
 229  * recovery timings:
 230  *
 231  *                      Read    Write
 232  *      Mode    Active  -- Recovery --  Cycle   IOMD type
 233  *      MW0     215     50      215     480     A
 234  *      MW1     80      50      50      150     C
 235  *      MW2     70      25      25      120     C
 236  */
 237 static void icside_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 238 {
 239         unsigned long cycle_time = 0;
 240         int use_dma_info = 0;
 241         const u8 xfer_mode = drive->dma_mode;
 242
 243         switch (xfer_mode) {
 244         case XFER_MW_DMA_2:
 245                 cycle_time = 250;
 246                 use_dma_info = 1;
 247                 break;
 248
 249         case XFER_MW_DMA_1:
 250                 cycle_time = 250;
 251                 use_dma_info = 1;
 252                 break;
 253
 254         case XFER_MW_DMA_0:
 255                 cycle_time = 480;
 256                 break;
 257
 258         case XFER_SW_DMA_2:
 259         case XFER_SW_DMA_1:
 260         case XFER_SW_DMA_0:
 261                 cycle_time = 480;
 262                 break;
 263         }
 264
 265         /*
 266          * If we're going to be doing MW_DMA_1 or MW_DMA_2, we should
 267          * take care to note the values in the ID...
 268          */
 269         if (use_dma_info && drive->id[ATA_ID_EIDE_DMA_TIME] > cycle_time)
 270                 cycle_time = drive->id[ATA_ID_EIDE_DMA_TIME];
 271
 272         ide_set_drivedata(drive, (void *)cycle_time);
 273
 274         printk(KERN_INFO "%s: %s selected (peak %luMB/s)\n",
 275                drive->name, ide_xfer_verbose(xfer_mode),
 276                2000 / (cycle_time ? cycle_time : (unsigned long) -1));
 277 }
 278
 279 static const struct ide_port_ops icside_v6_port_ops = {
 280         .set_dma_mode           = icside_set_dma_mode,
 281         .maskproc               = icside_maskproc,
 282 };
 283
 284 static void icside_dma_host_set(ide_drive_t *drive, int on)
 285 {
 286 }
 287
 288 static int icside_dma_end(ide_drive_t *drive)
 289 {
 290         ide_hwif_t *hwif = drive->hwif;
 291         struct expansion_card *ec = ECARD_DEV(hwif->dev);
 292
 293         disable_dma(ec->dma);
 294
 295         return get_dma_residue(ec->dma) != 0;
 296 }
 297
 298 static void icside_dma_start(ide_drive_t *drive)
 299 {
 300         ide_hwif_t *hwif = drive->hwif;
 301         struct expansion_card *ec = ECARD_DEV(hwif->dev);
 302
 303         /* We can not enable DMA on both channels simultaneously. */
 304         BUG_ON(dma_channel_active(ec->dma));
 305         enable_dma(ec->dma);
 306 }
 307
 308 static int icside_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
 309 {
 310         ide_hwif_t *hwif = drive->hwif;
 311         struct expansion_card *ec = ECARD_DEV(hwif->dev);
 312         struct icside_state *state = ecard_get_drvdata(ec);
 313         unsigned int dma_mode;
 314
 315         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 316                 dma_mode = DMA_MODE_WRITE;
 317         else
 318                 dma_mode = DMA_MODE_READ;
 319
 320         /*
 321          * We can not enable DMA on both channels.
 322          */
 323         BUG_ON(dma_channel_active(ec->dma));
 324
 325         /*
 326          * Ensure that we have the right interrupt routed.
 327          */
 328         icside_maskproc(drive, 0);
 329
 330         /*
 331          * Route the DMA signals to the correct interface.
 332          */
 333         writeb(state->sel | hwif->channel, state->ioc_base);
 334
 335         /*
 336          * Select the correct timing for this drive.
 337          */
 338         set_dma_speed(ec->dma, (unsigned long)ide_get_drivedata(drive));
 339
 340         /*
 341          * Tell the DMA engine about the SG table and
 342          * data direction.
 343          */
 344         set_dma_sg(ec->dma, hwif->sg_table, cmd->sg_nents);
 345         set_dma_mode(ec->dma, dma_mode);
 346
 347         return 0;
 348 }
 349
 350 static int icside_dma_test_irq(ide_drive_t *drive)
 351 {
 352         ide_hwif_t *hwif = drive->hwif;
 353         struct expansion_card *ec = ECARD_DEV(hwif->dev);
 354         struct icside_state *state = ecard_get_drvdata(ec);
 355
 356         return readb(state->irq_port +
 357                      (hwif->channel ?
 358                         ICS_ARCIN_V6_INTRSTAT_2 :
 359                         ICS_ARCIN_V6_INTRSTAT_1)) & 1;
 360 }
 361
 362 static int icside_dma_init(ide_hwif_t *hwif, const struct ide_port_info *d)
 363 {
 364         hwif->dmatable_cpu      = NULL;
 365         hwif->dmatable_dma      = 0;
 366
 367         return 0;
 368 }
 369
 370 static const struct ide_dma_ops icside_v6_dma_ops = {
 371         .dma_host_set           = icside_dma_host_set,
 372         .dma_setup              = icside_dma_setup,
 373         .dma_start              = icside_dma_start,
 374         .dma_end                = icside_dma_end,
 375         .dma_test_irq           = icside_dma_test_irq,
 376         .dma_lost_irq           = ide_dma_lost_irq,
 377 };
 378 #endif
 379
 380 static int icside_dma_off_init(ide_hwif_t *hwif, const struct ide_port_info *d)
 381 {
 382         return -EOPNOTSUPP;
 383 }
 384
 385 static void icside_setup_ports(struct ide_hw *hw, void __iomem *base,
 386                                struct cardinfo *info, struct expansion_card *ec)
 387 {
 388         unsigned long port = (unsigned long)base + info->dataoffset;
 389
 390         hw->io_ports.data_addr   = port;
 391         hw->io_ports.error_addr  = port + (1 << info->stepping);
 392         hw->io_ports.nsect_addr  = port + (2 << info->stepping);
 393         hw->io_ports.lbal_addr   = port + (3 << info->stepping);
 394         hw->io_ports.lbam_addr   = port + (4 << info->stepping);
 395         hw->io_ports.lbah_addr   = port + (5 << info->stepping);
 396         hw->io_ports.device_addr = port + (6 << info->stepping);
 397         hw->io_ports.status_addr = port + (7 << info->stepping);
 398         hw->io_ports.ctl_addr    = (unsigned long)base + info->ctrloffset;
 399
 400         hw->irq = ec->irq;
 401         hw->dev = &ec->dev;
 402 }
 403
 404 static const struct ide_port_info icside_v5_port_info = {
 405         .host_flags             = IDE_HFLAG_NO_DMA,
 406         .chipset                = ide_acorn,
 407 };
 408
 409 static int icside_register_v5(struct icside_state *state,
 410                               struct expansion_card *ec)
 411 {
 412         void __iomem *base;
 413         struct ide_host *host;
 414         struct ide_hw hw, *hws[] = { &hw };
 415         int ret;
 416
 417         base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
 418         if (!base)
 419                 return -ENOMEM;
 420
 421         state->irq_port = base;
 422
 423         ec->irqaddr  = base + ICS_ARCIN_V5_INTRSTAT;
 424         ec->irqmask  = 1;
 425
 426         ecard_setirq(ec, &icside_ops_arcin_v5, state);
 427
 428         /*
 429          * Be on the safe side - disable interrupts
 430          */
 431         icside_irqdisable_arcin_v5(ec, 0);
 432
 433         icside_setup_ports(&hw, base, &icside_cardinfo_v5, ec);
 434
 435         host = ide_host_alloc(&icside_v5_port_info, hws, 1);
 436         if (host == NULL)
 437                 return -ENODEV;
 438
 439         state->host = host;
 440
 441         ecard_set_drvdata(ec, state);
 442
 443         ret = ide_host_register(host, &icside_v5_port_info, hws);
 444         if (ret)
 445                 goto err_free;
 446
 447         return 0;
 448 err_free:
 449         ide_host_free(host);
 450         ecard_set_drvdata(ec, NULL);
 451         return ret;
 452 }
 453
 454 static const struct ide_port_info icside_v6_port_info __initconst = {
 455         .init_dma               = icside_dma_off_init,
 456         .port_ops               = &icside_v6_no_dma_port_ops,
 457         .host_flags             = IDE_HFLAG_SERIALIZE | IDE_HFLAG_MMIO,
 458         .mwdma_mask             = ATA_MWDMA2,
 459         .swdma_mask             = ATA_SWDMA2,
 460         .chipset                = ide_acorn,
 461 };
 462
 463 static int icside_register_v6(struct icside_state *state,
 464                               struct expansion_card *ec)
 465 {
 466         void __iomem *ioc_base, *easi_base;
 467         struct ide_host *host;
 468         unsigned int sel = 0;
 469         int ret;
 470         struct ide_hw hw[2], *hws[] = { &hw[0], &hw[1] };
 471         struct ide_port_info d = icside_v6_port_info;
 472
 473         ioc_base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
 474         if (!ioc_base) {
 475                 ret = -ENOMEM;
 476                 goto out;
 477         }
 478
 479         easi_base = ioc_base;
 480
 481         if (ecard_resource_flags(ec, ECARD_RES_EASI)) {
 482                 easi_base = ecardm_iomap(ec, ECARD_RES_EASI, 0, 0);
 483                 if (!easi_base) {
 484                         ret = -ENOMEM;
 485                         goto out;
 486                 }
 487
 488                 /*
 489                  * Enable access to the EASI region.
 490                  */
 491                 sel = 1 << 5;
 492         }
 493
 494         writeb(sel, ioc_base);
 495
 496         ecard_setirq(ec, &icside_ops_arcin_v6, state);
 497
 498         state->irq_port   = easi_base;
 499         state->ioc_base   = ioc_base;
 500         state->sel        = sel;
 501
 502         /*
 503          * Be on the safe side - disable interrupts
 504          */
 505         icside_irqdisable_arcin_v6(ec, 0);
 506
 507         icside_setup_ports(&hw[0], easi_base, &icside_cardinfo_v6_1, ec);
 508         icside_setup_ports(&hw[1], easi_base, &icside_cardinfo_v6_2, ec);
 509
 510         host = ide_host_alloc(&d, hws, 2);
 511         if (host == NULL)
 512                 return -ENODEV;
 513
 514         state->host = host;
 515
 516         ecard_set_drvdata(ec, state);
 517
 518 #ifdef CONFIG_BLK_DEV_IDEDMA_ICS
 519         if (ec->dma != NO_DMA && !request_dma(ec->dma, DRV_NAME)) {
 520                 d.init_dma = icside_dma_init;
 521                 d.port_ops = &icside_v6_port_ops;
 522                 d.dma_ops  = &icside_v6_dma_ops;
 523         }
 524 #endif
 525
 526         ret = ide_host_register(host, &d, hws);
 527         if (ret)
 528                 goto err_free;
 529
 530         return 0;
 531 err_free:
 532         ide_host_free(host);
 533         if (d.dma_ops)
 534                 free_dma(ec->dma);
 535         ecard_set_drvdata(ec, NULL);
 536 out:
 537         return ret;
 538 }
 539
 540 static int icside_probe(struct expansion_card *ec, const struct ecard_id *id)
 541 {
 542         struct icside_state *state;
 543         void __iomem *idmem;
 544         int ret;
 545
 546         ret = ecard_request_resources(ec);
 547         if (ret)
 548                 goto out;
 549
 550         state = kzalloc(sizeof(struct icside_state), GFP_KERNEL);
 551         if (!state) {
 552                 ret = -ENOMEM;
 553                 goto release;
 554         }
 555
 556         state->type     = ICS_TYPE_NOTYPE;
 557
 558         idmem = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
 559         if (idmem) {
 560                 unsigned int type;
 561
 562                 type = readb(idmem + ICS_IDENT_OFFSET) & 1;
 563                 type |= (readb(idmem + ICS_IDENT_OFFSET + 4) & 1) << 1;
 564                 type |= (readb(idmem + ICS_IDENT_OFFSET + 8) & 1) << 2;
 565                 type |= (readb(idmem + ICS_IDENT_OFFSET + 12) & 1) << 3;
 566                 ecardm_iounmap(ec, idmem);
 567
 568                 state->type = type;
 569         }
 570
 571         switch (state->type) {
 572         case ICS_TYPE_A3IN:
 573                 dev_warn(&ec->dev, "A3IN unsupported\n");
 574                 ret = -ENODEV;
 575                 break;
 576
 577         case ICS_TYPE_A3USER:
 578                 dev_warn(&ec->dev, "A3USER unsupported\n");
 579                 ret = -ENODEV;
 580                 break;
 581
 582         case ICS_TYPE_V5:
 583                 ret = icside_register_v5(state, ec);
 584                 break;
 585
 586         case ICS_TYPE_V6:
 587                 ret = icside_register_v6(state, ec);
 588                 break;
 589
 590         default:
 591                 dev_warn(&ec->dev, "unknown interface type\n");
 592                 ret = -ENODEV;
 593                 break;
 594         }
 595
 596         if (ret == 0)
 597                 goto out;
 598
 599         kfree(state);
 600  release:
 601         ecard_release_resources(ec);
 602  out:
 603         return ret;
 604 }
 605
 606 static void icside_remove(struct expansion_card *ec)
 607 {
 608         struct icside_state *state = ecard_get_drvdata(ec);
 609
 610         switch (state->type) {
 611         case ICS_TYPE_V5:
 612                 /* FIXME: tell IDE to stop using the interface */
 613
 614                 /* Disable interrupts */
 615                 icside_irqdisable_arcin_v5(ec, 0);
 616                 break;
 617
 618         case ICS_TYPE_V6:
 619                 /* FIXME: tell IDE to stop using the interface */
 620                 if (ec->dma != NO_DMA)
 621                         free_dma(ec->dma);
 622
 623                 /* Disable interrupts */
 624                 icside_irqdisable_arcin_v6(ec, 0);
 625
 626                 /* Reset the ROM pointer/EASI selection */
 627                 writeb(0, state->ioc_base);
 628                 break;
 629         }
 630
 631         ecard_set_drvdata(ec, NULL);
 632
 633         kfree(state);
 634         ecard_release_resources(ec);
 635 }
 636
 637 static void icside_shutdown(struct expansion_card *ec)
 638 {
 639         struct icside_state *state = ecard_get_drvdata(ec);
 640         unsigned long flags;
 641
 642         /*
 643          * Disable interrupts from this card.  We need to do
 644          * this before disabling EASI since we may be accessing
 645          * this register via that region.
 646          */
 647         local_irq_save(flags);
 648         ec->ops->irqdisable(ec, 0);
 649         local_irq_restore(flags);
 650
 651         /*
 652          * Reset the ROM pointer so that we can read the ROM
 653          * after a soft reboot.  This also disables access to
 654          * the IDE taskfile via the EASI region.
 655          */
 656         if (state->ioc_base)
 657                 writeb(0, state->ioc_base);
 658 }
 659
 660 static const struct ecard_id icside_ids[] = {
 661         { MANU_ICS,  PROD_ICS_IDE  },
 662         { MANU_ICS2, PROD_ICS2_IDE },
 663         { 0xffff, 0xffff }
 664 };
 665
 666 static struct ecard_driver icside_driver = {
 667         .probe          = icside_probe,
 668         .remove         = icside_remove,
 669         .shutdown       = icside_shutdown,
 670         .id_table       = icside_ids,
 671         .drv = {
 672                 .name   = "icside",
 673         },
 674 };
 675
 676 static int __init icside_init(void)
 677 {
 678         return ecard_register_driver(&icside_driver);
 679 }
 680
 681 static void __exit icside_exit(void)
 682 {
 683         ecard_remove_driver(&icside_driver);
 684 }
 685
 686 MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
 687 MODULE_LICENSE("GPL");
 688 MODULE_DESCRIPTION("ICS IDE driver");
 689
 690 module_init(icside_init);
 691 module_exit(icside_exit);