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