git.oblomov.eu Git - linux-2.6/blob - drivers/ide/arm/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/hdreg.h>
  14 #include <linux/ide.h>
  15 #include <linux/dma-mapping.h>
  16 #include <linux/device.h>
  17 #include <linux/init.h>
  18 #include <linux/scatterlist.h>
  19 #include <linux/io.h>
  20
  21 #include <asm/dma.h>
  22 #include <asm/ecard.h>
  23
  24 #define DRV_NAME "icside"
  25
  26 #define ICS_IDENT_OFFSET                0x2280
  27
  28 #define ICS_ARCIN_V5_INTRSTAT           0x0000
  29 #define ICS_ARCIN_V5_INTROFFSET         0x0004
  30 #define ICS_ARCIN_V5_IDEOFFSET          0x2800
  31 #define ICS_ARCIN_V5_IDEALTOFFSET       0x2b80
  32 #define ICS_ARCIN_V5_IDESTEPPING        6
  33
  34 #define ICS_ARCIN_V6_IDEOFFSET_1        0x2000
  35 #define ICS_ARCIN_V6_INTROFFSET_1       0x2200
  36 #define ICS_ARCIN_V6_INTRSTAT_1         0x2290
  37 #define ICS_ARCIN_V6_IDEALTOFFSET_1     0x2380
  38 #define ICS_ARCIN_V6_IDEOFFSET_2        0x3000
  39 #define ICS_ARCIN_V6_INTROFFSET_2       0x3200
  40 #define ICS_ARCIN_V6_INTRSTAT_2         0x3290
  41 #define ICS_ARCIN_V6_IDEALTOFFSET_2     0x3380
  42 #define ICS_ARCIN_V6_IDESTEPPING        6
  43
  44 struct cardinfo {
  45         unsigned int dataoffset;
  46         unsigned int ctrloffset;
  47         unsigned int stepping;
  48 };
  49
  50 static struct cardinfo icside_cardinfo_v5 = {
  51         .dataoffset     = ICS_ARCIN_V5_IDEOFFSET,
  52         .ctrloffset     = ICS_ARCIN_V5_IDEALTOFFSET,
  53         .stepping       = ICS_ARCIN_V5_IDESTEPPING,
  54 };
  55
  56 static struct cardinfo icside_cardinfo_v6_1 = {
  57         .dataoffset     = ICS_ARCIN_V6_IDEOFFSET_1,
  58         .ctrloffset     = ICS_ARCIN_V6_IDEALTOFFSET_1,
  59         .stepping       = ICS_ARCIN_V6_IDESTEPPING,
  60 };
  61
  62 static struct cardinfo icside_cardinfo_v6_2 = {
  63         .dataoffset     = ICS_ARCIN_V6_IDEOFFSET_2,
  64         .ctrloffset     = ICS_ARCIN_V6_IDEALTOFFSET_2,
  65         .stepping       = ICS_ARCIN_V6_IDESTEPPING,
  66 };
  67
  68 struct icside_state {
  69         unsigned int channel;
  70         unsigned int enabled;
  71         void __iomem *irq_port;
  72         void __iomem *ioc_base;
  73         unsigned int sel;
  74         unsigned int type;
  75         ide_hwif_t *hwif[2];
  76 };
  77
  78 #define ICS_TYPE_A3IN   0
  79 #define ICS_TYPE_A3USER 1
  80 #define ICS_TYPE_V6     3
  81 #define ICS_TYPE_V5     15
  82 #define ICS_TYPE_NOTYPE ((unsigned int)-1)
  83
  84 /* ---------------- Version 5 PCB Support Functions --------------------- */
  85 /* Prototype: icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
  86  * Purpose  : enable interrupts from card
  87  */
  88 static void icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
  89 {
  90         struct icside_state *state = ec->irq_data;
  91
  92         writeb(0, state->irq_port + ICS_ARCIN_V5_INTROFFSET);
  93 }
  94
  95 /* Prototype: icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
  96  * Purpose  : disable interrupts from card
  97  */
  98 static void icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
  99 {
 100         struct icside_state *state = ec->irq_data;
 101
 102         readb(state->irq_port + ICS_ARCIN_V5_INTROFFSET);
 103 }
 104
 105 static const expansioncard_ops_t icside_ops_arcin_v5 = {
 106         .irqenable      = icside_irqenable_arcin_v5,
 107         .irqdisable     = icside_irqdisable_arcin_v5,
 108 };
 109
 110
 111 /* ---------------- Version 6 PCB Support Functions --------------------- */
 112 /* Prototype: icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
 113  * Purpose  : enable interrupts from card
 114  */
 115 static void icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
 116 {
 117         struct icside_state *state = ec->irq_data;
 118         void __iomem *base = state->irq_port;
 119
 120         state->enabled = 1;
 121
 122         switch (state->channel) {
 123         case 0:
 124                 writeb(0, base + ICS_ARCIN_V6_INTROFFSET_1);
 125                 readb(base + ICS_ARCIN_V6_INTROFFSET_2);
 126                 break;
 127         case 1:
 128                 writeb(0, base + ICS_ARCIN_V6_INTROFFSET_2);
 129                 readb(base + ICS_ARCIN_V6_INTROFFSET_1);
 130                 break;
 131         }
 132 }
 133
 134 /* Prototype: icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
 135  * Purpose  : disable interrupts from card
 136  */
 137 static void icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
 138 {
 139         struct icside_state *state = ec->irq_data;
 140
 141         state->enabled = 0;
 142
 143         readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
 144         readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
 145 }
 146
 147 /* Prototype: icside_irqprobe(struct expansion_card *ec)
 148  * Purpose  : detect an active interrupt from card
 149  */
 150 static int icside_irqpending_arcin_v6(struct expansion_card *ec)
 151 {
 152         struct icside_state *state = ec->irq_data;
 153
 154         return readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_1) & 1 ||
 155                readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_2) & 1;
 156 }
 157
 158 static const expansioncard_ops_t icside_ops_arcin_v6 = {
 159         .irqenable      = icside_irqenable_arcin_v6,
 160         .irqdisable     = icside_irqdisable_arcin_v6,
 161         .irqpending     = icside_irqpending_arcin_v6,
 162 };
 163
 164 /*
 165  * Handle routing of interrupts.  This is called before
 166  * we write the command to the drive.
 167  */
 168 static void icside_maskproc(ide_drive_t *drive, int mask)
 169 {
 170         ide_hwif_t *hwif = HWIF(drive);
 171         struct expansion_card *ec = ECARD_DEV(hwif->dev);
 172         struct icside_state *state = ecard_get_drvdata(ec);
 173         unsigned long flags;
 174
 175         local_irq_save(flags);
 176
 177         state->channel = hwif->channel;
 178
 179         if (state->enabled && !mask) {
 180                 switch (hwif->channel) {
 181                 case 0:
 182                         writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
 183                         readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
 184                         break;
 185                 case 1:
 186                         writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
 187                         readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
 188                         break;
 189                 }
 190         } else {
 191                 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
 192                 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
 193         }
 194
 195         local_irq_restore(flags);
 196 }
 197
 198 static const struct ide_port_ops icside_v6_no_dma_port_ops = {
 199         .maskproc               = icside_maskproc,
 200 };
 201
 202 #ifdef CONFIG_BLK_DEV_IDEDMA_ICS
 203 /*
 204  * SG-DMA support.
 205  *
 206  * Similar to the BM-DMA, but we use the RiscPCs IOMD DMA controllers.
 207  * There is only one DMA controller per card, which means that only
 208  * one drive can be accessed at one time.  NOTE! We do not enforce that
 209  * here, but we rely on the main IDE driver spotting that both
 210  * interfaces use the same IRQ, which should guarantee this.
 211  */
 212
 213 /*
 214  * Configure the IOMD to give the appropriate timings for the transfer
 215  * mode being requested.  We take the advice of the ATA standards, and
 216  * calculate the cycle time based on the transfer mode, and the EIDE
 217  * MW DMA specs that the drive provides in the IDENTIFY command.
 218  *
 219  * We have the following IOMD DMA modes to choose from:
 220  *
 221  *      Type    Active          Recovery        Cycle
 222  *      A       250 (250)       312 (550)       562 (800)
 223  *      B       187             250             437
 224  *      C       125 (125)       125 (375)       250 (500)
 225  *      D       62              125             187
 226  *
 227  * (figures in brackets are actual measured timings)
 228  *
 229  * However, we also need to take care of the read/write active and
 230  * recovery timings:
 231  *
 232  *                      Read    Write
 233  *      Mode    Active  -- Recovery --  Cycle   IOMD type
 234  *      MW0     215     50      215     480     A
 235  *      MW1     80      50      50      150     C
 236  *      MW2     70      25      25      120     C
 237  */
 238 static void icside_set_dma_mode(ide_drive_t *drive, const u8 xfer_mode)
 239 {
 240         int cycle_time, use_dma_info = 0;
 241
 242         switch (xfer_mode) {
 243         case XFER_MW_DMA_2:
 244                 cycle_time = 250;
 245                 use_dma_info = 1;
 246                 break;
 247
 248         case XFER_MW_DMA_1:
 249                 cycle_time = 250;
 250                 use_dma_info = 1;
 251                 break;
 252
 253         case XFER_MW_DMA_0:
 254                 cycle_time = 480;
 255                 break;
 256
 257         case XFER_SW_DMA_2:
 258         case XFER_SW_DMA_1:
 259         case XFER_SW_DMA_0:
 260                 cycle_time = 480;
 261                 break;
 262         }
 263
 264         /*
 265          * If we're going to be doing MW_DMA_1 or MW_DMA_2, we should
 266          * take care to note the values in the ID...
 267          */
 268         if (use_dma_info && drive->id->eide_dma_time > cycle_time)
 269                 cycle_time = drive->id->eide_dma_time;
 270
 271         drive->drive_data = cycle_time;
 272
 273         printk("%s: %s selected (peak %dMB/s)\n", drive->name,
 274                 ide_xfer_verbose(xfer_mode), 2000 / drive->drive_data);
 275 }
 276
 277 static const struct ide_port_ops icside_v6_port_ops = {
 278         .set_dma_mode           = icside_set_dma_mode,
 279         .maskproc               = icside_maskproc,
 280 };
 281
 282 static void icside_dma_host_set(ide_drive_t *drive, int on)
 283 {
 284 }
 285
 286 static int icside_dma_end(ide_drive_t *drive)
 287 {
 288         ide_hwif_t *hwif = HWIF(drive);
 289         struct expansion_card *ec = ECARD_DEV(hwif->dev);
 290
 291         drive->waiting_for_dma = 0;
 292
 293         disable_dma(ec->dma);
 294
 295         /* Teardown mappings after DMA has completed. */
 296         ide_destroy_dmatable(drive);
 297
 298         return get_dma_residue(ec->dma) != 0;
 299 }
 300
 301 static void icside_dma_start(ide_drive_t *drive)
 302 {
 303         ide_hwif_t *hwif = HWIF(drive);
 304         struct expansion_card *ec = ECARD_DEV(hwif->dev);
 305
 306         /* We can not enable DMA on both channels simultaneously. */
 307         BUG_ON(dma_channel_active(ec->dma));
 308         enable_dma(ec->dma);
 309 }
 310
 311 static int icside_dma_setup(ide_drive_t *drive)
 312 {
 313         ide_hwif_t *hwif = HWIF(drive);
 314         struct expansion_card *ec = ECARD_DEV(hwif->dev);
 315         struct icside_state *state = ecard_get_drvdata(ec);
 316         struct request *rq = hwif->hwgroup->rq;
 317         unsigned int dma_mode;
 318
 319         if (rq_data_dir(rq))
 320                 dma_mode = DMA_MODE_WRITE;
 321         else
 322                 dma_mode = DMA_MODE_READ;
 323
 324         /*
 325          * We can not enable DMA on both channels.
 326          */
 327         BUG_ON(dma_channel_active(ec->dma));
 328
 329         hwif->sg_nents = ide_build_sglist(drive, rq);
 330
 331         /*
 332          * Ensure that we have the right interrupt routed.
 333          */
 334         icside_maskproc(drive, 0);
 335
 336         /*
 337          * Route the DMA signals to the correct interface.
 338          */
 339         writeb(state->sel | hwif->channel, state->ioc_base);
 340
 341         /*
 342          * Select the correct timing for this drive.
 343          */
 344         set_dma_speed(ec->dma, drive->drive_data);
 345
 346         /*
 347          * Tell the DMA engine about the SG table and
 348          * data direction.
 349          */
 350         set_dma_sg(ec->dma, hwif->sg_table, hwif->sg_nents);
 351         set_dma_mode(ec->dma, dma_mode);
 352
 353         drive->waiting_for_dma = 1;
 354
 355         return 0;
 356 }
 357
 358 static void icside_dma_exec_cmd(ide_drive_t *drive, u8 cmd)
 359 {
 360         /* issue cmd to drive */
 361         ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD, NULL);
 362 }
 363
 364 static int icside_dma_test_irq(ide_drive_t *drive)
 365 {
 366         ide_hwif_t *hwif = HWIF(drive);
 367         struct expansion_card *ec = ECARD_DEV(hwif->dev);
 368         struct icside_state *state = ecard_get_drvdata(ec);
 369
 370         return readb(state->irq_port +
 371                      (hwif->channel ?
 372                         ICS_ARCIN_V6_INTRSTAT_2 :
 373                         ICS_ARCIN_V6_INTRSTAT_1)) & 1;
 374 }
 375
 376 static void icside_dma_timeout(ide_drive_t *drive)
 377 {
 378         printk(KERN_ERR "%s: DMA timeout occurred: ", drive->name);
 379
 380         if (icside_dma_test_irq(drive))
 381                 return;
 382
 383         ide_dump_status(drive, "DMA timeout", ide_read_status(drive));
 384
 385         icside_dma_end(drive);
 386 }
 387
 388 static void icside_dma_lost_irq(ide_drive_t *drive)
 389 {
 390         printk(KERN_ERR "%s: IRQ lost\n", drive->name);
 391 }
 392
 393 static int icside_dma_init(ide_hwif_t *hwif, const struct ide_port_info *d)
 394 {
 395         hwif->dmatable_cpu      = NULL;
 396         hwif->dmatable_dma      = 0;
 397
 398         return 0;
 399 }
 400
 401 static const struct ide_dma_ops icside_v6_dma_ops = {
 402         .dma_host_set           = icside_dma_host_set,
 403         .dma_setup              = icside_dma_setup,
 404         .dma_exec_cmd           = icside_dma_exec_cmd,
 405         .dma_start              = icside_dma_start,
 406         .dma_end                = icside_dma_end,
 407         .dma_test_irq           = icside_dma_test_irq,
 408         .dma_timeout            = icside_dma_timeout,
 409         .dma_lost_irq           = icside_dma_lost_irq,
 410 };
 411 #else
 412 #define icside_v6_dma_ops NULL
 413 #endif
 414
 415 static int icside_dma_off_init(ide_hwif_t *hwif, const struct ide_port_info *d)
 416 {
 417         return -EOPNOTSUPP;
 418 }
 419
 420 static void icside_setup_ports(hw_regs_t *hw, void __iomem *base,
 421                                struct cardinfo *info, struct expansion_card *ec)
 422 {
 423         unsigned long port = (unsigned long)base + info->dataoffset;
 424
 425         hw->io_ports.data_addr   = port;
 426         hw->io_ports.error_addr  = port + (1 << info->stepping);
 427         hw->io_ports.nsect_addr  = port + (2 << info->stepping);
 428         hw->io_ports.lbal_addr   = port + (3 << info->stepping);
 429         hw->io_ports.lbam_addr   = port + (4 << info->stepping);
 430         hw->io_ports.lbah_addr   = port + (5 << info->stepping);
 431         hw->io_ports.device_addr = port + (6 << info->stepping);
 432         hw->io_ports.status_addr = port + (7 << info->stepping);
 433         hw->io_ports.ctl_addr    = (unsigned long)base + info->ctrloffset;
 434
 435         hw->irq = ec->irq;
 436         hw->dev = &ec->dev;
 437         hw->chipset = ide_acorn;
 438 }
 439
 440 static int __init
 441 icside_register_v5(struct icside_state *state, struct expansion_card *ec)
 442 {
 443         ide_hwif_t *hwif;
 444         void __iomem *base;
 445         u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 446         hw_regs_t hw;
 447
 448         base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
 449         if (!base)
 450                 return -ENOMEM;
 451
 452         state->irq_port = base;
 453
 454         ec->irqaddr  = base + ICS_ARCIN_V5_INTRSTAT;
 455         ec->irqmask  = 1;
 456
 457         ecard_setirq(ec, &icside_ops_arcin_v5, state);
 458
 459         /*
 460          * Be on the safe side - disable interrupts
 461          */
 462         icside_irqdisable_arcin_v5(ec, 0);
 463
 464         icside_setup_ports(&hw, base, &icside_cardinfo_v5, ec);
 465
 466         hwif = ide_find_port();
 467         if (!hwif)
 468                 return -ENODEV;
 469
 470         ide_init_port_hw(hwif, &hw);
 471         default_hwif_mmiops(hwif);
 472
 473         state->hwif[0] = hwif;
 474
 475         ecard_set_drvdata(ec, state);
 476
 477         idx[0] = hwif->index;
 478
 479         ide_device_add(idx, NULL);
 480
 481         return 0;
 482 }
 483
 484 static const struct ide_port_info icside_v6_port_info __initdata = {
 485         .init_dma               = icside_dma_off_init,
 486         .port_ops               = &icside_v6_no_dma_port_ops,
 487         .dma_ops                = &icside_v6_dma_ops,
 488         .host_flags             = IDE_HFLAG_SERIALIZE | IDE_HFLAG_MMIO,
 489         .mwdma_mask             = ATA_MWDMA2,
 490         .swdma_mask             = ATA_SWDMA2,
 491 };
 492
 493 static int __init
 494 icside_register_v6(struct icside_state *state, struct expansion_card *ec)
 495 {
 496         ide_hwif_t *hwif, *mate;
 497         void __iomem *ioc_base, *easi_base;
 498         unsigned int sel = 0;
 499         int ret;
 500         u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 501         struct ide_port_info d = icside_v6_port_info;
 502         hw_regs_t hw[2];
 503
 504         ioc_base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
 505         if (!ioc_base) {
 506                 ret = -ENOMEM;
 507                 goto out;
 508         }
 509
 510         easi_base = ioc_base;
 511
 512         if (ecard_resource_flags(ec, ECARD_RES_EASI)) {
 513                 easi_base = ecardm_iomap(ec, ECARD_RES_EASI, 0, 0);
 514                 if (!easi_base) {
 515                         ret = -ENOMEM;
 516                         goto out;
 517                 }
 518
 519                 /*
 520                  * Enable access to the EASI region.
 521                  */
 522                 sel = 1 << 5;
 523         }
 524
 525         writeb(sel, ioc_base);
 526
 527         ecard_setirq(ec, &icside_ops_arcin_v6, state);
 528
 529         state->irq_port   = easi_base;
 530         state->ioc_base   = ioc_base;
 531         state->sel        = sel;
 532
 533         /*
 534          * Be on the safe side - disable interrupts
 535          */
 536         icside_irqdisable_arcin_v6(ec, 0);
 537
 538         icside_setup_ports(&hw[0], easi_base, &icside_cardinfo_v6_1, ec);
 539         icside_setup_ports(&hw[1], easi_base, &icside_cardinfo_v6_2, ec);
 540
 541         /*
 542          * Find and register the interfaces.
 543          */
 544         hwif = ide_find_port();
 545         if (hwif == NULL)
 546                 return -ENODEV;
 547
 548         ide_init_port_hw(hwif, &hw[0]);
 549         default_hwif_mmiops(hwif);
 550
 551         idx[0] = hwif->index;
 552
 553         mate = ide_find_port();
 554         if (mate) {
 555                 ide_init_port_hw(mate, &hw[1]);
 556                 default_hwif_mmiops(mate);
 557
 558                 idx[1] = mate->index;
 559         }
 560
 561         state->hwif[0]    = hwif;
 562         state->hwif[1]    = mate;
 563
 564         ecard_set_drvdata(ec, state);
 565
 566         if (ec->dma != NO_DMA && !request_dma(ec->dma, DRV_NAME)) {
 567                 d.init_dma = icside_dma_init;
 568                 d.port_ops = &icside_v6_port_ops;
 569                 d.dma_ops = NULL;
 570         }
 571
 572         ide_device_add(idx, &d);
 573
 574         return 0;
 575
 576  out:
 577         return ret;
 578 }
 579
 580 static int __devinit
 581 icside_probe(struct expansion_card *ec, const struct ecard_id *id)
 582 {
 583         struct icside_state *state;
 584         void __iomem *idmem;
 585         int ret;
 586
 587         ret = ecard_request_resources(ec);
 588         if (ret)
 589                 goto out;
 590
 591         state = kzalloc(sizeof(struct icside_state), GFP_KERNEL);
 592         if (!state) {
 593                 ret = -ENOMEM;
 594                 goto release;
 595         }
 596
 597         state->type     = ICS_TYPE_NOTYPE;
 598
 599         idmem = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
 600         if (idmem) {
 601                 unsigned int type;
 602
 603                 type = readb(idmem + ICS_IDENT_OFFSET) & 1;
 604                 type |= (readb(idmem + ICS_IDENT_OFFSET + 4) & 1) << 1;
 605                 type |= (readb(idmem + ICS_IDENT_OFFSET + 8) & 1) << 2;
 606                 type |= (readb(idmem + ICS_IDENT_OFFSET + 12) & 1) << 3;
 607                 ecardm_iounmap(ec, idmem);
 608
 609                 state->type = type;
 610         }
 611
 612         switch (state->type) {
 613         case ICS_TYPE_A3IN:
 614                 dev_warn(&ec->dev, "A3IN unsupported\n");
 615                 ret = -ENODEV;
 616                 break;
 617
 618         case ICS_TYPE_A3USER:
 619                 dev_warn(&ec->dev, "A3USER unsupported\n");
 620                 ret = -ENODEV;
 621                 break;
 622
 623         case ICS_TYPE_V5:
 624                 ret = icside_register_v5(state, ec);
 625                 break;
 626
 627         case ICS_TYPE_V6:
 628                 ret = icside_register_v6(state, ec);
 629                 break;
 630
 631         default:
 632                 dev_warn(&ec->dev, "unknown interface type\n");
 633                 ret = -ENODEV;
 634                 break;
 635         }
 636
 637         if (ret == 0)
 638                 goto out;
 639
 640         kfree(state);
 641  release:
 642         ecard_release_resources(ec);
 643  out:
 644         return ret;
 645 }
 646
 647 static void __devexit icside_remove(struct expansion_card *ec)
 648 {
 649         struct icside_state *state = ecard_get_drvdata(ec);
 650
 651         switch (state->type) {
 652         case ICS_TYPE_V5:
 653                 /* FIXME: tell IDE to stop using the interface */
 654
 655                 /* Disable interrupts */
 656                 icside_irqdisable_arcin_v5(ec, 0);
 657                 break;
 658
 659         case ICS_TYPE_V6:
 660                 /* FIXME: tell IDE to stop using the interface */
 661                 if (ec->dma != NO_DMA)
 662                         free_dma(ec->dma);
 663
 664                 /* Disable interrupts */
 665                 icside_irqdisable_arcin_v6(ec, 0);
 666
 667                 /* Reset the ROM pointer/EASI selection */
 668                 writeb(0, state->ioc_base);
 669                 break;
 670         }
 671
 672         ecard_set_drvdata(ec, NULL);
 673
 674         kfree(state);
 675         ecard_release_resources(ec);
 676 }
 677
 678 static void icside_shutdown(struct expansion_card *ec)
 679 {
 680         struct icside_state *state = ecard_get_drvdata(ec);
 681         unsigned long flags;
 682
 683         /*
 684          * Disable interrupts from this card.  We need to do
 685          * this before disabling EASI since we may be accessing
 686          * this register via that region.
 687          */
 688         local_irq_save(flags);
 689         ec->ops->irqdisable(ec, 0);
 690         local_irq_restore(flags);
 691
 692         /*
 693          * Reset the ROM pointer so that we can read the ROM
 694          * after a soft reboot.  This also disables access to
 695          * the IDE taskfile via the EASI region.
 696          */
 697         if (state->ioc_base)
 698                 writeb(0, state->ioc_base);
 699 }
 700
 701 static const struct ecard_id icside_ids[] = {
 702         { MANU_ICS,  PROD_ICS_IDE  },
 703         { MANU_ICS2, PROD_ICS2_IDE },
 704         { 0xffff, 0xffff }
 705 };
 706
 707 static struct ecard_driver icside_driver = {
 708         .probe          = icside_probe,
 709         .remove         = __devexit_p(icside_remove),
 710         .shutdown       = icside_shutdown,
 711         .id_table       = icside_ids,
 712         .drv = {
 713                 .name   = "icside",
 714         },
 715 };
 716
 717 static int __init icside_init(void)
 718 {
 719         return ecard_register_driver(&icside_driver);
 720 }
 721
 722 MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
 723 MODULE_LICENSE("GPL");
 724 MODULE_DESCRIPTION("ICS IDE driver");
 725
 726 module_init(icside_init);