drivers/vme/bridges/vme_ca91cx42.c

   1 /*
   2  * Support for the Tundra Universe I/II VME-PCI Bridge Chips
   3  *
   4  * Author: Martyn Welch <martyn.welch@ge.com>
   5  * Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc.
   6  *
   7  * Based on work by Tom Armistead and Ajit Prem
   8  * Copyright 2004 Motorola Inc.
   9  *
  10  * Derived from ca91c042.c by Michael Wyrick
  11  *
  12  * This program is free software; you can redistribute  it and/or modify it
  13  * under  the terms of  the GNU General  Public License as published by the
  14  * Free Software Foundation;  either version 2 of the  License, or (at your
  15  * option) any later version.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/mm.h>
  20 #include <linux/types.h>
  21 #include <linux/errno.h>
  22 #include <linux/pci.h>
  23 #include <linux/dma-mapping.h>
  24 #include <linux/poll.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/spinlock.h>
  27 #include <linux/sched.h>
  28 #include <linux/slab.h>
  29 #include <linux/time.h>
  30 #include <linux/io.h>
  31 #include <linux/uaccess.h>
  32 #include <linux/vme.h>
  33
  34 #include "../vme_bridge.h"
  35 #include "vme_ca91cx42.h"
  36
  37 static int __init ca91cx42_init(void);
  38 static int ca91cx42_probe(struct pci_dev *, const struct pci_device_id *);
  39 static void ca91cx42_remove(struct pci_dev *);
  40 static void __exit ca91cx42_exit(void);
  41
  42 /* Module parameters */
  43 static int geoid;
  44
  45 static const char driver_name[] = "vme_ca91cx42";
  46
  47 static DEFINE_PCI_DEVICE_TABLE(ca91cx42_ids) = {
  48         { PCI_DEVICE(PCI_VENDOR_ID_TUNDRA, PCI_DEVICE_ID_TUNDRA_CA91C142) },
  49         { },
  50 };
  51
  52 static struct pci_driver ca91cx42_driver = {
  53         .name = driver_name,
  54         .id_table = ca91cx42_ids,
  55         .probe = ca91cx42_probe,
  56         .remove = ca91cx42_remove,
  57 };
  58
  59 static u32 ca91cx42_DMA_irqhandler(struct ca91cx42_driver *bridge)
  60 {
  61         wake_up(&bridge->dma_queue);
  62
  63         return CA91CX42_LINT_DMA;
  64 }
  65
  66 static u32 ca91cx42_LM_irqhandler(struct ca91cx42_driver *bridge, u32 stat)
  67 {
  68         int i;
  69         u32 serviced = 0;
  70
  71         for (i = 0; i < 4; i++) {
  72                 if (stat & CA91CX42_LINT_LM[i]) {
  73                         /* We only enable interrupts if the callback is set */
  74                         bridge->lm_callback[i](i);
  75                         serviced |= CA91CX42_LINT_LM[i];
  76                 }
  77         }
  78
  79         return serviced;
  80 }
  81
  82 /* XXX This needs to be split into 4 queues */
  83 static u32 ca91cx42_MB_irqhandler(struct ca91cx42_driver *bridge, int mbox_mask)
  84 {
  85         wake_up(&bridge->mbox_queue);
  86
  87         return CA91CX42_LINT_MBOX;
  88 }
  89
  90 static u32 ca91cx42_IACK_irqhandler(struct ca91cx42_driver *bridge)
  91 {
  92         wake_up(&bridge->iack_queue);
  93
  94         return CA91CX42_LINT_SW_IACK;
  95 }
  96
  97 static u32 ca91cx42_VERR_irqhandler(struct vme_bridge *ca91cx42_bridge)
  98 {
  99         int val;
 100         struct ca91cx42_driver *bridge;
 101
 102         bridge = ca91cx42_bridge->driver_priv;
 103
 104         val = ioread32(bridge->base + DGCS);
 105
 106         if (!(val & 0x00000800)) {
 107                 dev_err(ca91cx42_bridge->parent, "ca91cx42_VERR_irqhandler DMA "
 108                         "Read Error DGCS=%08X\n", val);
 109         }
 110
 111         return CA91CX42_LINT_VERR;
 112 }
 113
 114 static u32 ca91cx42_LERR_irqhandler(struct vme_bridge *ca91cx42_bridge)
 115 {
 116         int val;
 117         struct ca91cx42_driver *bridge;
 118
 119         bridge = ca91cx42_bridge->driver_priv;
 120
 121         val = ioread32(bridge->base + DGCS);
 122
 123         if (!(val & 0x00000800))
 124                 dev_err(ca91cx42_bridge->parent, "ca91cx42_LERR_irqhandler DMA "
 125                         "Read Error DGCS=%08X\n", val);
 126
 127         return CA91CX42_LINT_LERR;
 128 }
 129
 130
 131 static u32 ca91cx42_VIRQ_irqhandler(struct vme_bridge *ca91cx42_bridge,
 132         int stat)
 133 {
 134         int vec, i, serviced = 0;
 135         struct ca91cx42_driver *bridge;
 136
 137         bridge = ca91cx42_bridge->driver_priv;
 138
 139
 140         for (i = 7; i > 0; i--) {
 141                 if (stat & (1 << i)) {
 142                         vec = ioread32(bridge->base +
 143                                 CA91CX42_V_STATID[i]) & 0xff;
 144
 145                         vme_irq_handler(ca91cx42_bridge, i, vec);
 146
 147                         serviced |= (1 << i);
 148                 }
 149         }
 150
 151         return serviced;
 152 }
 153
 154 static irqreturn_t ca91cx42_irqhandler(int irq, void *ptr)
 155 {
 156         u32 stat, enable, serviced = 0;
 157         struct vme_bridge *ca91cx42_bridge;
 158         struct ca91cx42_driver *bridge;
 159
 160         ca91cx42_bridge = ptr;
 161
 162         bridge = ca91cx42_bridge->driver_priv;
 163
 164         enable = ioread32(bridge->base + LINT_EN);
 165         stat = ioread32(bridge->base + LINT_STAT);
 166
 167         /* Only look at unmasked interrupts */
 168         stat &= enable;
 169
 170         if (unlikely(!stat))
 171                 return IRQ_NONE;
 172
 173         if (stat & CA91CX42_LINT_DMA)
 174                 serviced |= ca91cx42_DMA_irqhandler(bridge);
 175         if (stat & (CA91CX42_LINT_LM0 | CA91CX42_LINT_LM1 | CA91CX42_LINT_LM2 |
 176                         CA91CX42_LINT_LM3))
 177                 serviced |= ca91cx42_LM_irqhandler(bridge, stat);
 178         if (stat & CA91CX42_LINT_MBOX)
 179                 serviced |= ca91cx42_MB_irqhandler(bridge, stat);
 180         if (stat & CA91CX42_LINT_SW_IACK)
 181                 serviced |= ca91cx42_IACK_irqhandler(bridge);
 182         if (stat & CA91CX42_LINT_VERR)
 183                 serviced |= ca91cx42_VERR_irqhandler(ca91cx42_bridge);
 184         if (stat & CA91CX42_LINT_LERR)
 185                 serviced |= ca91cx42_LERR_irqhandler(ca91cx42_bridge);
 186         if (stat & (CA91CX42_LINT_VIRQ1 | CA91CX42_LINT_VIRQ2 |
 187                         CA91CX42_LINT_VIRQ3 | CA91CX42_LINT_VIRQ4 |
 188                         CA91CX42_LINT_VIRQ5 | CA91CX42_LINT_VIRQ6 |
 189                         CA91CX42_LINT_VIRQ7))
 190                 serviced |= ca91cx42_VIRQ_irqhandler(ca91cx42_bridge, stat);
 191
 192         /* Clear serviced interrupts */
 193         iowrite32(serviced, bridge->base + LINT_STAT);
 194
 195         return IRQ_HANDLED;
 196 }
 197
 198 static int ca91cx42_irq_init(struct vme_bridge *ca91cx42_bridge)
 199 {
 200         int result, tmp;
 201         struct pci_dev *pdev;
 202         struct ca91cx42_driver *bridge;
 203
 204         bridge = ca91cx42_bridge->driver_priv;
 205
 206         /* Need pdev */
 207         pdev = container_of(ca91cx42_bridge->parent, struct pci_dev, dev);
 208
 209         /* Initialise list for VME bus errors */
 210         INIT_LIST_HEAD(&ca91cx42_bridge->vme_errors);
 211
 212         mutex_init(&ca91cx42_bridge->irq_mtx);
 213
 214         /* Disable interrupts from PCI to VME */
 215         iowrite32(0, bridge->base + VINT_EN);
 216
 217         /* Disable PCI interrupts */
 218         iowrite32(0, bridge->base + LINT_EN);
 219         /* Clear Any Pending PCI Interrupts */
 220         iowrite32(0x00FFFFFF, bridge->base + LINT_STAT);
 221
 222         result = request_irq(pdev->irq, ca91cx42_irqhandler, IRQF_SHARED,
 223                         driver_name, ca91cx42_bridge);
 224         if (result) {
 225                 dev_err(&pdev->dev, "Can't get assigned pci irq vector %02X\n",
 226                        pdev->irq);
 227                 return result;
 228         }
 229
 230         /* Ensure all interrupts are mapped to PCI Interrupt 0 */
 231         iowrite32(0, bridge->base + LINT_MAP0);
 232         iowrite32(0, bridge->base + LINT_MAP1);
 233         iowrite32(0, bridge->base + LINT_MAP2);
 234
 235         /* Enable DMA, mailbox & LM Interrupts */
 236         tmp = CA91CX42_LINT_MBOX3 | CA91CX42_LINT_MBOX2 | CA91CX42_LINT_MBOX1 |
 237                 CA91CX42_LINT_MBOX0 | CA91CX42_LINT_SW_IACK |
 238                 CA91CX42_LINT_VERR | CA91CX42_LINT_LERR | CA91CX42_LINT_DMA;
 239
 240         iowrite32(tmp, bridge->base + LINT_EN);
 241
 242         return 0;
 243 }
 244
 245 static void ca91cx42_irq_exit(struct ca91cx42_driver *bridge,
 246         struct pci_dev *pdev)
 247 {
 248         /* Disable interrupts from PCI to VME */
 249         iowrite32(0, bridge->base + VINT_EN);
 250
 251         /* Disable PCI interrupts */
 252         iowrite32(0, bridge->base + LINT_EN);
 253         /* Clear Any Pending PCI Interrupts */
 254         iowrite32(0x00FFFFFF, bridge->base + LINT_STAT);
 255
 256         free_irq(pdev->irq, pdev);
 257 }
 258
 259 static int ca91cx42_iack_received(struct ca91cx42_driver *bridge, int level)
 260 {
 261         u32 tmp;
 262
 263         tmp = ioread32(bridge->base + LINT_STAT);
 264
 265         if (tmp & (1 << level))
 266                 return 0;
 267         else
 268                 return 1;
 269 }
 270
 271 /*
 272  * Set up an VME interrupt
 273  */
 274 static void ca91cx42_irq_set(struct vme_bridge *ca91cx42_bridge, int level,
 275         int state, int sync)
 276
 277 {
 278         struct pci_dev *pdev;
 279         u32 tmp;
 280         struct ca91cx42_driver *bridge;
 281
 282         bridge = ca91cx42_bridge->driver_priv;
 283
 284         /* Enable IRQ level */
 285         tmp = ioread32(bridge->base + LINT_EN);
 286
 287         if (state == 0)
 288                 tmp &= ~CA91CX42_LINT_VIRQ[level];
 289         else
 290                 tmp |= CA91CX42_LINT_VIRQ[level];
 291
 292         iowrite32(tmp, bridge->base + LINT_EN);
 293
 294         if ((state == 0) && (sync != 0)) {
 295                 pdev = container_of(ca91cx42_bridge->parent, struct pci_dev,
 296                         dev);
 297
 298                 synchronize_irq(pdev->irq);
 299         }
 300 }
 301
 302 static int ca91cx42_irq_generate(struct vme_bridge *ca91cx42_bridge, int level,
 303         int statid)
 304 {
 305         u32 tmp;
 306         struct ca91cx42_driver *bridge;
 307
 308         bridge = ca91cx42_bridge->driver_priv;
 309
 310         /* Universe can only generate even vectors */
 311         if (statid & 1)
 312                 return -EINVAL;
 313
 314         mutex_lock(&bridge->vme_int);
 315
 316         tmp = ioread32(bridge->base + VINT_EN);
 317
 318         /* Set Status/ID */
 319         iowrite32(statid << 24, bridge->base + STATID);
 320
 321         /* Assert VMEbus IRQ */
 322         tmp = tmp | (1 << (level + 24));
 323         iowrite32(tmp, bridge->base + VINT_EN);
 324
 325         /* Wait for IACK */
 326         wait_event_interruptible(bridge->iack_queue,
 327                                  ca91cx42_iack_received(bridge, level));
 328
 329         /* Return interrupt to low state */
 330         tmp = ioread32(bridge->base + VINT_EN);
 331         tmp = tmp & ~(1 << (level + 24));
 332         iowrite32(tmp, bridge->base + VINT_EN);
 333
 334         mutex_unlock(&bridge->vme_int);
 335
 336         return 0;
 337 }
 338
 339 static int ca91cx42_slave_set(struct vme_slave_resource *image, int enabled,
 340         unsigned long long vme_base, unsigned long long size,
 341         dma_addr_t pci_base, u32 aspace, u32 cycle)
 342 {
 343         unsigned int i, addr = 0, granularity;
 344         unsigned int temp_ctl = 0;
 345         unsigned int vme_bound, pci_offset;
 346         struct vme_bridge *ca91cx42_bridge;
 347         struct ca91cx42_driver *bridge;
 348
 349         ca91cx42_bridge = image->parent;
 350
 351         bridge = ca91cx42_bridge->driver_priv;
 352
 353         i = image->number;
 354
 355         switch (aspace) {
 356         case VME_A16:
 357                 addr |= CA91CX42_VSI_CTL_VAS_A16;
 358                 break;
 359         case VME_A24:
 360                 addr |= CA91CX42_VSI_CTL_VAS_A24;
 361                 break;
 362         case VME_A32:
 363                 addr |= CA91CX42_VSI_CTL_VAS_A32;
 364                 break;
 365         case VME_USER1:
 366                 addr |= CA91CX42_VSI_CTL_VAS_USER1;
 367                 break;
 368         case VME_USER2:
 369                 addr |= CA91CX42_VSI_CTL_VAS_USER2;
 370                 break;
 371         case VME_A64:
 372         case VME_CRCSR:
 373         case VME_USER3:
 374         case VME_USER4:
 375         default:
 376                 dev_err(ca91cx42_bridge->parent, "Invalid address space\n");
 377                 return -EINVAL;
 378                 break;
 379         }
 380
 381         /*
 382          * Bound address is a valid address for the window, adjust
 383          * accordingly
 384          */
 385         vme_bound = vme_base + size;
 386         pci_offset = pci_base - vme_base;
 387
 388         if ((i == 0) || (i == 4))
 389                 granularity = 0x1000;
 390         else
 391                 granularity = 0x10000;
 392
 393         if (vme_base & (granularity - 1)) {
 394                 dev_err(ca91cx42_bridge->parent, "Invalid VME base "
 395                         "alignment\n");
 396                 return -EINVAL;
 397         }
 398         if (vme_bound & (granularity - 1)) {
 399                 dev_err(ca91cx42_bridge->parent, "Invalid VME bound "
 400                         "alignment\n");
 401                 return -EINVAL;
 402         }
 403         if (pci_offset & (granularity - 1)) {
 404                 dev_err(ca91cx42_bridge->parent, "Invalid PCI Offset "
 405                         "alignment\n");
 406                 return -EINVAL;
 407         }
 408
 409         /* Disable while we are mucking around */
 410         temp_ctl = ioread32(bridge->base + CA91CX42_VSI_CTL[i]);
 411         temp_ctl &= ~CA91CX42_VSI_CTL_EN;
 412         iowrite32(temp_ctl, bridge->base + CA91CX42_VSI_CTL[i]);
 413
 414         /* Setup mapping */
 415         iowrite32(vme_base, bridge->base + CA91CX42_VSI_BS[i]);
 416         iowrite32(vme_bound, bridge->base + CA91CX42_VSI_BD[i]);
 417         iowrite32(pci_offset, bridge->base + CA91CX42_VSI_TO[i]);
 418
 419         /* Setup address space */
 420         temp_ctl &= ~CA91CX42_VSI_CTL_VAS_M;
 421         temp_ctl |= addr;
 422
 423         /* Setup cycle types */
 424         temp_ctl &= ~(CA91CX42_VSI_CTL_PGM_M | CA91CX42_VSI_CTL_SUPER_M);
 425         if (cycle & VME_SUPER)
 426                 temp_ctl |= CA91CX42_VSI_CTL_SUPER_SUPR;
 427         if (cycle & VME_USER)
 428                 temp_ctl |= CA91CX42_VSI_CTL_SUPER_NPRIV;
 429         if (cycle & VME_PROG)
 430                 temp_ctl |= CA91CX42_VSI_CTL_PGM_PGM;
 431         if (cycle & VME_DATA)
 432                 temp_ctl |= CA91CX42_VSI_CTL_PGM_DATA;
 433
 434         /* Write ctl reg without enable */
 435         iowrite32(temp_ctl, bridge->base + CA91CX42_VSI_CTL[i]);
 436
 437         if (enabled)
 438                 temp_ctl |= CA91CX42_VSI_CTL_EN;
 439
 440         iowrite32(temp_ctl, bridge->base + CA91CX42_VSI_CTL[i]);
 441
 442         return 0;
 443 }
 444
 445 static int ca91cx42_slave_get(struct vme_slave_resource *image, int *enabled,
 446         unsigned long long *vme_base, unsigned long long *size,
 447         dma_addr_t *pci_base, u32 *aspace, u32 *cycle)
 448 {
 449         unsigned int i, granularity = 0, ctl = 0;
 450         unsigned long long vme_bound, pci_offset;
 451         struct ca91cx42_driver *bridge;
 452
 453         bridge = image->parent->driver_priv;
 454
 455         i = image->number;
 456
 457         if ((i == 0) || (i == 4))
 458                 granularity = 0x1000;
 459         else
 460                 granularity = 0x10000;
 461
 462         /* Read Registers */
 463         ctl = ioread32(bridge->base + CA91CX42_VSI_CTL[i]);
 464
 465         *vme_base = ioread32(bridge->base + CA91CX42_VSI_BS[i]);
 466         vme_bound = ioread32(bridge->base + CA91CX42_VSI_BD[i]);
 467         pci_offset = ioread32(bridge->base + CA91CX42_VSI_TO[i]);
 468
 469         *pci_base = (dma_addr_t)vme_base + pci_offset;
 470         *size = (unsigned long long)((vme_bound - *vme_base) + granularity);
 471
 472         *enabled = 0;
 473         *aspace = 0;
 474         *cycle = 0;
 475
 476         if (ctl & CA91CX42_VSI_CTL_EN)
 477                 *enabled = 1;
 478
 479         if ((ctl & CA91CX42_VSI_CTL_VAS_M) == CA91CX42_VSI_CTL_VAS_A16)
 480                 *aspace = VME_A16;
 481         if ((ctl & CA91CX42_VSI_CTL_VAS_M) == CA91CX42_VSI_CTL_VAS_A24)
 482                 *aspace = VME_A24;
 483         if ((ctl & CA91CX42_VSI_CTL_VAS_M) == CA91CX42_VSI_CTL_VAS_A32)
 484                 *aspace = VME_A32;
 485         if ((ctl & CA91CX42_VSI_CTL_VAS_M) == CA91CX42_VSI_CTL_VAS_USER1)
 486                 *aspace = VME_USER1;
 487         if ((ctl & CA91CX42_VSI_CTL_VAS_M) == CA91CX42_VSI_CTL_VAS_USER2)
 488                 *aspace = VME_USER2;
 489
 490         if (ctl & CA91CX42_VSI_CTL_SUPER_SUPR)
 491                 *cycle |= VME_SUPER;
 492         if (ctl & CA91CX42_VSI_CTL_SUPER_NPRIV)
 493                 *cycle |= VME_USER;
 494         if (ctl & CA91CX42_VSI_CTL_PGM_PGM)
 495                 *cycle |= VME_PROG;
 496         if (ctl & CA91CX42_VSI_CTL_PGM_DATA)
 497                 *cycle |= VME_DATA;
 498
 499         return 0;
 500 }
 501
 502 /*
 503  * Allocate and map PCI Resource
 504  */
 505 static int ca91cx42_alloc_resource(struct vme_master_resource *image,
 506         unsigned long long size)
 507 {
 508         unsigned long long existing_size;
 509         int retval = 0;
 510         struct pci_dev *pdev;
 511         struct vme_bridge *ca91cx42_bridge;
 512
 513         ca91cx42_bridge = image->parent;
 514
 515         /* Find pci_dev container of dev */
 516         if (ca91cx42_bridge->parent == NULL) {
 517                 dev_err(ca91cx42_bridge->parent, "Dev entry NULL\n");
 518                 return -EINVAL;
 519         }
 520         pdev = container_of(ca91cx42_bridge->parent, struct pci_dev, dev);
 521
 522         existing_size = (unsigned long long)(image->bus_resource.end -
 523                 image->bus_resource.start);
 524
 525         /* If the existing size is OK, return */
 526         if (existing_size == (size - 1))
 527                 return 0;
 528
 529         if (existing_size != 0) {
 530                 iounmap(image->kern_base);
 531                 image->kern_base = NULL;
 532                 kfree(image->bus_resource.name);
 533                 release_resource(&image->bus_resource);
 534                 memset(&image->bus_resource, 0, sizeof(struct resource));
 535         }
 536
 537         if (image->bus_resource.name == NULL) {
 538                 image->bus_resource.name = kmalloc(VMENAMSIZ+3, GFP_ATOMIC);
 539                 if (image->bus_resource.name == NULL) {
 540                         dev_err(ca91cx42_bridge->parent, "Unable to allocate "
 541                                 "memory for resource name\n");
 542                         retval = -ENOMEM;
 543                         goto err_name;
 544                 }
 545         }
 546
 547         sprintf((char *)image->bus_resource.name, "%s.%d",
 548                 ca91cx42_bridge->name, image->number);
 549
 550         image->bus_resource.start = 0;
 551         image->bus_resource.end = (unsigned long)size;
 552         image->bus_resource.flags = IORESOURCE_MEM;
 553
 554         retval = pci_bus_alloc_resource(pdev->bus,
 555                 &image->bus_resource, size, size, PCIBIOS_MIN_MEM,
 556                 0, NULL, NULL);
 557         if (retval) {
 558                 dev_err(ca91cx42_bridge->parent, "Failed to allocate mem "
 559                         "resource for window %d size 0x%lx start 0x%lx\n",
 560                         image->number, (unsigned long)size,
 561                         (unsigned long)image->bus_resource.start);
 562                 goto err_resource;
 563         }
 564
 565         image->kern_base = ioremap_nocache(
 566                 image->bus_resource.start, size);
 567         if (image->kern_base == NULL) {
 568                 dev_err(ca91cx42_bridge->parent, "Failed to remap resource\n");
 569                 retval = -ENOMEM;
 570                 goto err_remap;
 571         }
 572
 573         return 0;
 574
 575 err_remap:
 576         release_resource(&image->bus_resource);
 577 err_resource:
 578         kfree(image->bus_resource.name);
 579         memset(&image->bus_resource, 0, sizeof(struct resource));
 580 err_name:
 581         return retval;
 582 }
 583
 584 /*
 585  * Free and unmap PCI Resource
 586  */
 587 static void ca91cx42_free_resource(struct vme_master_resource *image)
 588 {
 589         iounmap(image->kern_base);
 590         image->kern_base = NULL;
 591         release_resource(&image->bus_resource);
 592         kfree(image->bus_resource.name);
 593         memset(&image->bus_resource, 0, sizeof(struct resource));
 594 }
 595
 596
 597 static int ca91cx42_master_set(struct vme_master_resource *image, int enabled,
 598         unsigned long long vme_base, unsigned long long size, u32 aspace,
 599         u32 cycle, u32 dwidth)
 600 {
 601         int retval = 0;
 602         unsigned int i, granularity = 0;
 603         unsigned int temp_ctl = 0;
 604         unsigned long long pci_bound, vme_offset, pci_base;
 605         struct vme_bridge *ca91cx42_bridge;
 606         struct ca91cx42_driver *bridge;
 607
 608         ca91cx42_bridge = image->parent;
 609
 610         bridge = ca91cx42_bridge->driver_priv;
 611
 612         i = image->number;
 613
 614         if ((i == 0) || (i == 4))
 615                 granularity = 0x1000;
 616         else
 617                 granularity = 0x10000;
 618
 619         /* Verify input data */
 620         if (vme_base & (granularity - 1)) {
 621                 dev_err(ca91cx42_bridge->parent, "Invalid VME Window "
 622                         "alignment\n");
 623                 retval = -EINVAL;
 624                 goto err_window;
 625         }
 626         if (size & (granularity - 1)) {
 627                 dev_err(ca91cx42_bridge->parent, "Invalid VME Window "
 628                         "alignment\n");
 629                 retval = -EINVAL;
 630                 goto err_window;
 631         }
 632
 633         spin_lock(&image->lock);
 634
 635         /*
 636          * Let's allocate the resource here rather than further up the stack as
 637          * it avoids pushing loads of bus dependent stuff up the stack
 638          */
 639         retval = ca91cx42_alloc_resource(image, size);
 640         if (retval) {
 641                 spin_unlock(&image->lock);
 642                 dev_err(ca91cx42_bridge->parent, "Unable to allocate memory "
 643                         "for resource name\n");
 644                 retval = -ENOMEM;
 645                 goto err_res;
 646         }
 647
 648         pci_base = (unsigned long long)image->bus_resource.start;
 649
 650         /*
 651          * Bound address is a valid address for the window, adjust
 652          * according to window granularity.
 653          */
 654         pci_bound = pci_base + size;
 655         vme_offset = vme_base - pci_base;
 656
 657         /* Disable while we are mucking around */
 658         temp_ctl = ioread32(bridge->base + CA91CX42_LSI_CTL[i]);
 659         temp_ctl &= ~CA91CX42_LSI_CTL_EN;
 660         iowrite32(temp_ctl, bridge->base + CA91CX42_LSI_CTL[i]);
 661
 662         /* Setup cycle types */
 663         temp_ctl &= ~CA91CX42_LSI_CTL_VCT_M;
 664         if (cycle & VME_BLT)
 665                 temp_ctl |= CA91CX42_LSI_CTL_VCT_BLT;
 666         if (cycle & VME_MBLT)
 667                 temp_ctl |= CA91CX42_LSI_CTL_VCT_MBLT;
 668
 669         /* Setup data width */
 670         temp_ctl &= ~CA91CX42_LSI_CTL_VDW_M;
 671         switch (dwidth) {
 672         case VME_D8:
 673                 temp_ctl |= CA91CX42_LSI_CTL_VDW_D8;
 674                 break;
 675         case VME_D16:
 676                 temp_ctl |= CA91CX42_LSI_CTL_VDW_D16;
 677                 break;
 678         case VME_D32:
 679                 temp_ctl |= CA91CX42_LSI_CTL_VDW_D32;
 680                 break;
 681         case VME_D64:
 682                 temp_ctl |= CA91CX42_LSI_CTL_VDW_D64;
 683                 break;
 684         default:
 685                 spin_unlock(&image->lock);
 686                 dev_err(ca91cx42_bridge->parent, "Invalid data width\n");
 687                 retval = -EINVAL;
 688                 goto err_dwidth;
 689                 break;
 690         }
 691
 692         /* Setup address space */
 693         temp_ctl &= ~CA91CX42_LSI_CTL_VAS_M;
 694         switch (aspace) {
 695         case VME_A16:
 696                 temp_ctl |= CA91CX42_LSI_CTL_VAS_A16;
 697                 break;
 698         case VME_A24:
 699                 temp_ctl |= CA91CX42_LSI_CTL_VAS_A24;
 700                 break;
 701         case VME_A32:
 702                 temp_ctl |= CA91CX42_LSI_CTL_VAS_A32;
 703                 break;
 704         case VME_CRCSR:
 705                 temp_ctl |= CA91CX42_LSI_CTL_VAS_CRCSR;
 706                 break;
 707         case VME_USER1:
 708                 temp_ctl |= CA91CX42_LSI_CTL_VAS_USER1;
 709                 break;
 710         case VME_USER2:
 711                 temp_ctl |= CA91CX42_LSI_CTL_VAS_USER2;
 712                 break;
 713         case VME_A64:
 714         case VME_USER3:
 715         case VME_USER4:
 716         default:
 717                 spin_unlock(&image->lock);
 718                 dev_err(ca91cx42_bridge->parent, "Invalid address space\n");
 719                 retval = -EINVAL;
 720                 goto err_aspace;
 721                 break;
 722         }
 723
 724         temp_ctl &= ~(CA91CX42_LSI_CTL_PGM_M | CA91CX42_LSI_CTL_SUPER_M);
 725         if (cycle & VME_SUPER)
 726                 temp_ctl |= CA91CX42_LSI_CTL_SUPER_SUPR;
 727         if (cycle & VME_PROG)
 728                 temp_ctl |= CA91CX42_LSI_CTL_PGM_PGM;
 729
 730         /* Setup mapping */
 731         iowrite32(pci_base, bridge->base + CA91CX42_LSI_BS[i]);
 732         iowrite32(pci_bound, bridge->base + CA91CX42_LSI_BD[i]);
 733         iowrite32(vme_offset, bridge->base + CA91CX42_LSI_TO[i]);
 734
 735         /* Write ctl reg without enable */
 736         iowrite32(temp_ctl, bridge->base + CA91CX42_LSI_CTL[i]);
 737
 738         if (enabled)
 739                 temp_ctl |= CA91CX42_LSI_CTL_EN;
 740
 741         iowrite32(temp_ctl, bridge->base + CA91CX42_LSI_CTL[i]);
 742
 743         spin_unlock(&image->lock);
 744         return 0;
 745
 746 err_aspace:
 747 err_dwidth:
 748         ca91cx42_free_resource(image);
 749 err_res:
 750 err_window:
 751         return retval;
 752 }
 753
 754 static int __ca91cx42_master_get(struct vme_master_resource *image,
 755         int *enabled, unsigned long long *vme_base, unsigned long long *size,
 756         u32 *aspace, u32 *cycle, u32 *dwidth)
 757 {
 758         unsigned int i, ctl;
 759         unsigned long long pci_base, pci_bound, vme_offset;
 760         struct ca91cx42_driver *bridge;
 761
 762         bridge = image->parent->driver_priv;
 763
 764         i = image->number;
 765
 766         ctl = ioread32(bridge->base + CA91CX42_LSI_CTL[i]);
 767
 768         pci_base = ioread32(bridge->base + CA91CX42_LSI_BS[i]);
 769         vme_offset = ioread32(bridge->base + CA91CX42_LSI_TO[i]);
 770         pci_bound = ioread32(bridge->base + CA91CX42_LSI_BD[i]);
 771
 772         *vme_base = pci_base + vme_offset;
 773         *size = (unsigned long long)(pci_bound - pci_base);
 774
 775         *enabled = 0;
 776         *aspace = 0;
 777         *cycle = 0;
 778         *dwidth = 0;
 779
 780         if (ctl & CA91CX42_LSI_CTL_EN)
 781                 *enabled = 1;
 782
 783         /* Setup address space */
 784         switch (ctl & CA91CX42_LSI_CTL_VAS_M) {
 785         case CA91CX42_LSI_CTL_VAS_A16:
 786                 *aspace = VME_A16;
 787                 break;
 788         case CA91CX42_LSI_CTL_VAS_A24:
 789                 *aspace = VME_A24;
 790                 break;
 791         case CA91CX42_LSI_CTL_VAS_A32:
 792                 *aspace = VME_A32;
 793                 break;
 794         case CA91CX42_LSI_CTL_VAS_CRCSR:
 795                 *aspace = VME_CRCSR;
 796                 break;
 797         case CA91CX42_LSI_CTL_VAS_USER1:
 798                 *aspace = VME_USER1;
 799                 break;
 800         case CA91CX42_LSI_CTL_VAS_USER2:
 801                 *aspace = VME_USER2;
 802                 break;
 803         }
 804
 805         /* XXX Not sure howto check for MBLT */
 806         /* Setup cycle types */
 807         if (ctl & CA91CX42_LSI_CTL_VCT_BLT)
 808                 *cycle |= VME_BLT;
 809         else
 810                 *cycle |= VME_SCT;
 811
 812         if (ctl & CA91CX42_LSI_CTL_SUPER_SUPR)
 813                 *cycle |= VME_SUPER;
 814         else
 815                 *cycle |= VME_USER;
 816
 817         if (ctl & CA91CX42_LSI_CTL_PGM_PGM)
 818                 *cycle = VME_PROG;
 819         else
 820                 *cycle = VME_DATA;
 821
 822         /* Setup data width */
 823         switch (ctl & CA91CX42_LSI_CTL_VDW_M) {
 824         case CA91CX42_LSI_CTL_VDW_D8:
 825                 *dwidth = VME_D8;
 826                 break;
 827         case CA91CX42_LSI_CTL_VDW_D16:
 828                 *dwidth = VME_D16;
 829                 break;
 830         case CA91CX42_LSI_CTL_VDW_D32:
 831                 *dwidth = VME_D32;
 832                 break;
 833         case CA91CX42_LSI_CTL_VDW_D64:
 834                 *dwidth = VME_D64;
 835                 break;
 836         }
 837
 838         return 0;
 839 }
 840
 841 static int ca91cx42_master_get(struct vme_master_resource *image, int *enabled,
 842         unsigned long long *vme_base, unsigned long long *size, u32 *aspace,
 843         u32 *cycle, u32 *dwidth)
 844 {
 845         int retval;
 846
 847         spin_lock(&image->lock);
 848
 849         retval = __ca91cx42_master_get(image, enabled, vme_base, size, aspace,
 850                 cycle, dwidth);
 851
 852         spin_unlock(&image->lock);
 853
 854         return retval;
 855 }
 856
 857 static ssize_t ca91cx42_master_read(struct vme_master_resource *image,
 858         void *buf, size_t count, loff_t offset)
 859 {
 860         ssize_t retval;
 861         void *addr = image->kern_base + offset;
 862         unsigned int done = 0;
 863         unsigned int count32;
 864
 865         if (count == 0)
 866                 return 0;
 867
 868         spin_lock(&image->lock);
 869
 870         /* The following code handles VME address alignment problem
 871          * in order to assure the maximal data width cycle.
 872          * We cannot use memcpy_xxx directly here because it
 873          * may cut data transfer in 8-bits cycles, thus making
 874          * D16 cycle impossible.
 875          * From the other hand, the bridge itself assures that
 876          * maximal configured data cycle is used and splits it
 877          * automatically for non-aligned addresses.
 878          */
 879         if ((uintptr_t)addr & 0x1) {
 880                 *(u8 *)buf = ioread8(addr);
 881                 done += 1;
 882                 if (done == count)
 883                         goto out;
 884         }
 885         if ((uintptr_t)addr & 0x2) {
 886                 if ((count - done) < 2) {
 887                         *(u8 *)(buf + done) = ioread8(addr + done);
 888                         done += 1;
 889                         goto out;
 890                 } else {
 891                         *(u16 *)(buf + done) = ioread16(addr + done);
 892                         done += 2;
 893                 }
 894         }
 895
 896         count32 = (count - done) & ~0x3;
 897         if (count32 > 0) {
 898                 memcpy_fromio(buf + done, addr + done, (unsigned int)count);
 899                 done += count32;
 900         }
 901
 902         if ((count - done) & 0x2) {
 903                 *(u16 *)(buf + done) = ioread16(addr + done);
 904                 done += 2;
 905         }
 906         if ((count - done) & 0x1) {
 907                 *(u8 *)(buf + done) = ioread8(addr + done);
 908                 done += 1;
 909         }
 910 out:
 911         retval = count;
 912         spin_unlock(&image->lock);
 913
 914         return retval;
 915 }
 916
 917 static ssize_t ca91cx42_master_write(struct vme_master_resource *image,
 918         void *buf, size_t count, loff_t offset)
 919 {
 920         ssize_t retval;
 921         void *addr = image->kern_base + offset;
 922         unsigned int done = 0;
 923         unsigned int count32;
 924
 925         if (count == 0)
 926                 return 0;
 927
 928         spin_lock(&image->lock);
 929
 930         /* Here we apply for the same strategy we do in master_read
 931          * function in order to assure D16 cycle when required.
 932          */
 933         if ((uintptr_t)addr & 0x1) {
 934                 iowrite8(*(u8 *)buf, addr);
 935                 done += 1;
 936                 if (done == count)
 937                         goto out;
 938         }
 939         if ((uintptr_t)addr & 0x2) {
 940                 if ((count - done) < 2) {
 941                         iowrite8(*(u8 *)(buf + done), addr + done);
 942                         done += 1;
 943                         goto out;
 944                 } else {
 945                         iowrite16(*(u16 *)(buf + done), addr + done);
 946                         done += 2;
 947                 }
 948         }
 949
 950         count32 = (count - done) & ~0x3;
 951         if (count32 > 0) {
 952                 memcpy_toio(addr + done, buf + done, count32);
 953                 done += count32;
 954         }
 955
 956         if ((count - done) & 0x2) {
 957                 iowrite16(*(u16 *)(buf + done), addr + done);
 958                 done += 2;
 959         }
 960         if ((count - done) & 0x1) {
 961                 iowrite8(*(u8 *)(buf + done), addr + done);
 962                 done += 1;
 963         }
 964 out:
 965         retval = count;
 966
 967         spin_unlock(&image->lock);
 968
 969         return retval;
 970 }
 971
 972 static unsigned int ca91cx42_master_rmw(struct vme_master_resource *image,
 973         unsigned int mask, unsigned int compare, unsigned int swap,
 974         loff_t offset)
 975 {
 976         u32 result;
 977         uintptr_t pci_addr;
 978         int i;
 979         struct ca91cx42_driver *bridge;
 980         struct device *dev;
 981
 982         bridge = image->parent->driver_priv;
 983         dev = image->parent->parent;
 984
 985         /* Find the PCI address that maps to the desired VME address */
 986         i = image->number;
 987
 988         /* Locking as we can only do one of these at a time */
 989         mutex_lock(&bridge->vme_rmw);
 990
 991         /* Lock image */
 992         spin_lock(&image->lock);
 993
 994         pci_addr = (uintptr_t)image->kern_base + offset;
 995
 996         /* Address must be 4-byte aligned */
 997         if (pci_addr & 0x3) {
 998                 dev_err(dev, "RMW Address not 4-byte aligned\n");
 999                 result = -EINVAL;
1000                 goto out;
1001         }
1002
1003         /* Ensure RMW Disabled whilst configuring */
1004         iowrite32(0, bridge->base + SCYC_CTL);
1005
1006         /* Configure registers */
1007         iowrite32(mask, bridge->base + SCYC_EN);
1008         iowrite32(compare, bridge->base + SCYC_CMP);
1009         iowrite32(swap, bridge->base + SCYC_SWP);
1010         iowrite32(pci_addr, bridge->base + SCYC_ADDR);
1011
1012         /* Enable RMW */
1013         iowrite32(CA91CX42_SCYC_CTL_CYC_RMW, bridge->base + SCYC_CTL);
1014
1015         /* Kick process off with a read to the required address. */
1016         result = ioread32(image->kern_base + offset);
1017
1018         /* Disable RMW */
1019         iowrite32(0, bridge->base + SCYC_CTL);
1020
1021 out:
1022         spin_unlock(&image->lock);
1023
1024         mutex_unlock(&bridge->vme_rmw);
1025
1026         return result;
1027 }
1028
1029 static int ca91cx42_dma_list_add(struct vme_dma_list *list,
1030         struct vme_dma_attr *src, struct vme_dma_attr *dest, size_t count)
1031 {
1032         struct ca91cx42_dma_entry *entry, *prev;
1033         struct vme_dma_pci *pci_attr;
1034         struct vme_dma_vme *vme_attr;
1035         dma_addr_t desc_ptr;
1036         int retval = 0;
1037         struct device *dev;
1038
1039         dev = list->parent->parent->parent;
1040
1041         /* XXX descriptor must be aligned on 64-bit boundaries */
1042         entry = kmalloc(sizeof(struct ca91cx42_dma_entry), GFP_KERNEL);
1043         if (entry == NULL) {
1044                 dev_err(dev, "Failed to allocate memory for dma resource "
1045                         "structure\n");
1046                 retval = -ENOMEM;
1047                 goto err_mem;
1048         }
1049
1050         /* Test descriptor alignment */
1051         if ((unsigned long)&entry->descriptor & CA91CX42_DCPP_M) {
1052                 dev_err(dev, "Descriptor not aligned to 16 byte boundary as "
1053                         "required: %p\n", &entry->descriptor);
1054                 retval = -EINVAL;
1055                 goto err_align;
1056         }
1057
1058         memset(&entry->descriptor, 0, sizeof(struct ca91cx42_dma_descriptor));
1059
1060         if (dest->type == VME_DMA_VME) {
1061                 entry->descriptor.dctl |= CA91CX42_DCTL_L2V;
1062                 vme_attr = dest->private;
1063                 pci_attr = src->private;
1064         } else {
1065                 vme_attr = src->private;
1066                 pci_attr = dest->private;
1067         }
1068
1069         /* Check we can do fulfill required attributes */
1070         if ((vme_attr->aspace & ~(VME_A16 | VME_A24 | VME_A32 | VME_USER1 |
1071                 VME_USER2)) != 0) {
1072
1073                 dev_err(dev, "Unsupported cycle type\n");
1074                 retval = -EINVAL;
1075                 goto err_aspace;
1076         }
1077
1078         if ((vme_attr->cycle & ~(VME_SCT | VME_BLT | VME_SUPER | VME_USER |
1079                 VME_PROG | VME_DATA)) != 0) {
1080
1081                 dev_err(dev, "Unsupported cycle type\n");
1082                 retval = -EINVAL;
1083                 goto err_cycle;
1084         }
1085
1086         /* Check to see if we can fulfill source and destination */
1087         if (!(((src->type == VME_DMA_PCI) && (dest->type == VME_DMA_VME)) ||
1088                 ((src->type == VME_DMA_VME) && (dest->type == VME_DMA_PCI)))) {
1089
1090                 dev_err(dev, "Cannot perform transfer with this "
1091                         "source-destination combination\n");
1092                 retval = -EINVAL;
1093                 goto err_direct;
1094         }
1095
1096         /* Setup cycle types */
1097         if (vme_attr->cycle & VME_BLT)
1098                 entry->descriptor.dctl |= CA91CX42_DCTL_VCT_BLT;
1099
1100         /* Setup data width */
1101         switch (vme_attr->dwidth) {
1102         case VME_D8:
1103                 entry->descriptor.dctl |= CA91CX42_DCTL_VDW_D8;
1104                 break;
1105         case VME_D16:
1106                 entry->descriptor.dctl |= CA91CX42_DCTL_VDW_D16;
1107                 break;
1108         case VME_D32:
1109                 entry->descriptor.dctl |= CA91CX42_DCTL_VDW_D32;
1110                 break;
1111         case VME_D64:
1112                 entry->descriptor.dctl |= CA91CX42_DCTL_VDW_D64;
1113                 break;
1114         default:
1115                 dev_err(dev, "Invalid data width\n");
1116                 return -EINVAL;
1117         }
1118
1119         /* Setup address space */
1120         switch (vme_attr->aspace) {
1121         case VME_A16:
1122                 entry->descriptor.dctl |= CA91CX42_DCTL_VAS_A16;
1123                 break;
1124         case VME_A24:
1125                 entry->descriptor.dctl |= CA91CX42_DCTL_VAS_A24;
1126                 break;
1127         case VME_A32:
1128                 entry->descriptor.dctl |= CA91CX42_DCTL_VAS_A32;
1129                 break;
1130         case VME_USER1:
1131                 entry->descriptor.dctl |= CA91CX42_DCTL_VAS_USER1;
1132                 break;
1133         case VME_USER2:
1134                 entry->descriptor.dctl |= CA91CX42_DCTL_VAS_USER2;
1135                 break;
1136         default:
1137                 dev_err(dev, "Invalid address space\n");
1138                 return -EINVAL;
1139                 break;
1140         }
1141
1142         if (vme_attr->cycle & VME_SUPER)
1143                 entry->descriptor.dctl |= CA91CX42_DCTL_SUPER_SUPR;
1144         if (vme_attr->cycle & VME_PROG)
1145                 entry->descriptor.dctl |= CA91CX42_DCTL_PGM_PGM;
1146
1147         entry->descriptor.dtbc = count;
1148         entry->descriptor.dla = pci_attr->address;
1149         entry->descriptor.dva = vme_attr->address;
1150         entry->descriptor.dcpp = CA91CX42_DCPP_NULL;
1151
1152         /* Add to list */
1153         list_add_tail(&entry->list, &list->entries);
1154
1155         /* Fill out previous descriptors "Next Address" */
1156         if (entry->list.prev != &list->entries) {
1157                 prev = list_entry(entry->list.prev, struct ca91cx42_dma_entry,
1158                         list);
1159                 /* We need the bus address for the pointer */
1160                 desc_ptr = virt_to_bus(&entry->descriptor);
1161                 prev->descriptor.dcpp = desc_ptr & ~CA91CX42_DCPP_M;
1162         }
1163
1164         return 0;
1165
1166 err_cycle:
1167 err_aspace:
1168 err_direct:
1169 err_align:
1170         kfree(entry);
1171 err_mem:
1172         return retval;
1173 }
1174
1175 static int ca91cx42_dma_busy(struct vme_bridge *ca91cx42_bridge)
1176 {
1177         u32 tmp;
1178         struct ca91cx42_driver *bridge;
1179
1180         bridge = ca91cx42_bridge->driver_priv;
1181
1182         tmp = ioread32(bridge->base + DGCS);
1183
1184         if (tmp & CA91CX42_DGCS_ACT)
1185                 return 0;
1186         else
1187                 return 1;
1188 }
1189
1190 static int ca91cx42_dma_list_exec(struct vme_dma_list *list)
1191 {
1192         struct vme_dma_resource *ctrlr;
1193         struct ca91cx42_dma_entry *entry;
1194         int retval = 0;
1195         dma_addr_t bus_addr;
1196         u32 val;
1197         struct device *dev;
1198         struct ca91cx42_driver *bridge;
1199
1200         ctrlr = list->parent;
1201
1202         bridge = ctrlr->parent->driver_priv;
1203         dev = ctrlr->parent->parent;
1204
1205         mutex_lock(&ctrlr->mtx);
1206
1207         if (!(list_empty(&ctrlr->running))) {
1208                 /*
1209                  * XXX We have an active DMA transfer and currently haven't
1210                  *     sorted out the mechanism for "pending" DMA transfers.
1211                  *     Return busy.
1212                  */
1213                 /* Need to add to pending here */
1214                 mutex_unlock(&ctrlr->mtx);
1215                 return -EBUSY;
1216         } else {
1217                 list_add(&list->list, &ctrlr->running);
1218         }
1219
1220         /* Get first bus address and write into registers */
1221         entry = list_first_entry(&list->entries, struct ca91cx42_dma_entry,
1222                 list);
1223
1224         bus_addr = virt_to_bus(&entry->descriptor);
1225
1226         mutex_unlock(&ctrlr->mtx);
1227
1228         iowrite32(0, bridge->base + DTBC);
1229         iowrite32(bus_addr & ~CA91CX42_DCPP_M, bridge->base + DCPP);
1230
1231         /* Start the operation */
1232         val = ioread32(bridge->base + DGCS);
1233
1234         /* XXX Could set VMEbus On and Off Counters here */
1235         val &= (CA91CX42_DGCS_VON_M | CA91CX42_DGCS_VOFF_M);
1236
1237         val |= (CA91CX42_DGCS_CHAIN | CA91CX42_DGCS_STOP | CA91CX42_DGCS_HALT |
1238                 CA91CX42_DGCS_DONE | CA91CX42_DGCS_LERR | CA91CX42_DGCS_VERR |
1239                 CA91CX42_DGCS_PERR);
1240
1241         iowrite32(val, bridge->base + DGCS);
1242
1243         val |= CA91CX42_DGCS_GO;
1244
1245         iowrite32(val, bridge->base + DGCS);
1246
1247         wait_event_interruptible(bridge->dma_queue,
1248                 ca91cx42_dma_busy(ctrlr->parent));
1249
1250         /*
1251          * Read status register, this register is valid until we kick off a
1252          * new transfer.
1253          */
1254         val = ioread32(bridge->base + DGCS);
1255
1256         if (val & (CA91CX42_DGCS_LERR | CA91CX42_DGCS_VERR |
1257                 CA91CX42_DGCS_PERR)) {
1258
1259                 dev_err(dev, "ca91c042: DMA Error. DGCS=%08X\n", val);
1260                 val = ioread32(bridge->base + DCTL);
1261         }
1262
1263         /* Remove list from running list */
1264         mutex_lock(&ctrlr->mtx);
1265         list_del(&list->list);
1266         mutex_unlock(&ctrlr->mtx);
1267
1268         return retval;
1269
1270 }
1271
1272 static int ca91cx42_dma_list_empty(struct vme_dma_list *list)
1273 {
1274         struct list_head *pos, *temp;
1275         struct ca91cx42_dma_entry *entry;
1276
1277         /* detach and free each entry */
1278         list_for_each_safe(pos, temp, &list->entries) {
1279                 list_del(pos);
1280                 entry = list_entry(pos, struct ca91cx42_dma_entry, list);
1281                 kfree(entry);
1282         }
1283
1284         return 0;
1285 }
1286
1287 /*
1288  * All 4 location monitors reside at the same base - this is therefore a
1289  * system wide configuration.
1290  *
1291  * This does not enable the LM monitor - that should be done when the first
1292  * callback is attached and disabled when the last callback is removed.
1293  */
1294 static int ca91cx42_lm_set(struct vme_lm_resource *lm,
1295         unsigned long long lm_base, u32 aspace, u32 cycle)
1296 {
1297         u32 temp_base, lm_ctl = 0;
1298         int i;
1299         struct ca91cx42_driver *bridge;
1300         struct device *dev;
1301
1302         bridge = lm->parent->driver_priv;
1303         dev = lm->parent->parent;
1304
1305         /* Check the alignment of the location monitor */
1306         temp_base = (u32)lm_base;
1307         if (temp_base & 0xffff) {
1308                 dev_err(dev, "Location monitor must be aligned to 64KB "
1309                         "boundary");
1310                 return -EINVAL;
1311         }
1312
1313         mutex_lock(&lm->mtx);
1314
1315         /* If we already have a callback attached, we can't move it! */
1316         for (i = 0; i < lm->monitors; i++) {
1317                 if (bridge->lm_callback[i] != NULL) {
1318                         mutex_unlock(&lm->mtx);
1319                         dev_err(dev, "Location monitor callback attached, "
1320                                 "can't reset\n");
1321                         return -EBUSY;
1322                 }
1323         }
1324
1325         switch (aspace) {
1326         case VME_A16:
1327                 lm_ctl |= CA91CX42_LM_CTL_AS_A16;
1328                 break;
1329         case VME_A24:
1330                 lm_ctl |= CA91CX42_LM_CTL_AS_A24;
1331                 break;
1332         case VME_A32:
1333                 lm_ctl |= CA91CX42_LM_CTL_AS_A32;
1334                 break;
1335         default:
1336                 mutex_unlock(&lm->mtx);
1337                 dev_err(dev, "Invalid address space\n");
1338                 return -EINVAL;
1339                 break;
1340         }
1341
1342         if (cycle & VME_SUPER)
1343                 lm_ctl |= CA91CX42_LM_CTL_SUPR;
1344         if (cycle & VME_USER)
1345                 lm_ctl |= CA91CX42_LM_CTL_NPRIV;
1346         if (cycle & VME_PROG)
1347                 lm_ctl |= CA91CX42_LM_CTL_PGM;
1348         if (cycle & VME_DATA)
1349                 lm_ctl |= CA91CX42_LM_CTL_DATA;
1350
1351         iowrite32(lm_base, bridge->base + LM_BS);
1352         iowrite32(lm_ctl, bridge->base + LM_CTL);
1353
1354         mutex_unlock(&lm->mtx);
1355
1356         return 0;
1357 }
1358
1359 /* Get configuration of the callback monitor and return whether it is enabled
1360  * or disabled.
1361  */
1362 static int ca91cx42_lm_get(struct vme_lm_resource *lm,
1363         unsigned long long *lm_base, u32 *aspace, u32 *cycle)
1364 {
1365         u32 lm_ctl, enabled = 0;
1366         struct ca91cx42_driver *bridge;
1367
1368         bridge = lm->parent->driver_priv;
1369
1370         mutex_lock(&lm->mtx);
1371
1372         *lm_base = (unsigned long long)ioread32(bridge->base + LM_BS);
1373         lm_ctl = ioread32(bridge->base + LM_CTL);
1374
1375         if (lm_ctl & CA91CX42_LM_CTL_EN)
1376                 enabled = 1;
1377
1378         if ((lm_ctl & CA91CX42_LM_CTL_AS_M) == CA91CX42_LM_CTL_AS_A16)
1379                 *aspace = VME_A16;
1380         if ((lm_ctl & CA91CX42_LM_CTL_AS_M) == CA91CX42_LM_CTL_AS_A24)
1381                 *aspace = VME_A24;
1382         if ((lm_ctl & CA91CX42_LM_CTL_AS_M) == CA91CX42_LM_CTL_AS_A32)
1383                 *aspace = VME_A32;
1384
1385         *cycle = 0;
1386         if (lm_ctl & CA91CX42_LM_CTL_SUPR)
1387                 *cycle |= VME_SUPER;
1388         if (lm_ctl & CA91CX42_LM_CTL_NPRIV)
1389                 *cycle |= VME_USER;
1390         if (lm_ctl & CA91CX42_LM_CTL_PGM)
1391                 *cycle |= VME_PROG;
1392         if (lm_ctl & CA91CX42_LM_CTL_DATA)
1393                 *cycle |= VME_DATA;
1394
1395         mutex_unlock(&lm->mtx);
1396
1397         return enabled;
1398 }
1399
1400 /*
1401  * Attach a callback to a specific location monitor.
1402  *
1403  * Callback will be passed the monitor triggered.
1404  */
1405 static int ca91cx42_lm_attach(struct vme_lm_resource *lm, int monitor,
1406         void (*callback)(int))
1407 {
1408         u32 lm_ctl, tmp;
1409         struct ca91cx42_driver *bridge;
1410         struct device *dev;
1411
1412         bridge = lm->parent->driver_priv;
1413         dev = lm->parent->parent;
1414
1415         mutex_lock(&lm->mtx);
1416
1417         /* Ensure that the location monitor is configured - need PGM or DATA */
1418         lm_ctl = ioread32(bridge->base + LM_CTL);
1419         if ((lm_ctl & (CA91CX42_LM_CTL_PGM | CA91CX42_LM_CTL_DATA)) == 0) {
1420                 mutex_unlock(&lm->mtx);
1421                 dev_err(dev, "Location monitor not properly configured\n");
1422                 return -EINVAL;
1423         }
1424
1425         /* Check that a callback isn't already attached */
1426         if (bridge->lm_callback[monitor] != NULL) {
1427                 mutex_unlock(&lm->mtx);
1428                 dev_err(dev, "Existing callback attached\n");
1429                 return -EBUSY;
1430         }
1431
1432         /* Attach callback */
1433         bridge->lm_callback[monitor] = callback;
1434
1435         /* Enable Location Monitor interrupt */
1436         tmp = ioread32(bridge->base + LINT_EN);
1437         tmp |= CA91CX42_LINT_LM[monitor];
1438         iowrite32(tmp, bridge->base + LINT_EN);
1439
1440         /* Ensure that global Location Monitor Enable set */
1441         if ((lm_ctl & CA91CX42_LM_CTL_EN) == 0) {
1442                 lm_ctl |= CA91CX42_LM_CTL_EN;
1443                 iowrite32(lm_ctl, bridge->base + LM_CTL);
1444         }
1445
1446         mutex_unlock(&lm->mtx);
1447
1448         return 0;
1449 }
1450
1451 /*
1452  * Detach a callback function forn a specific location monitor.
1453  */
1454 static int ca91cx42_lm_detach(struct vme_lm_resource *lm, int monitor)
1455 {
1456         u32 tmp;
1457         struct ca91cx42_driver *bridge;
1458
1459         bridge = lm->parent->driver_priv;
1460
1461         mutex_lock(&lm->mtx);
1462
1463         /* Disable Location Monitor and ensure previous interrupts are clear */
1464         tmp = ioread32(bridge->base + LINT_EN);
1465         tmp &= ~CA91CX42_LINT_LM[monitor];
1466         iowrite32(tmp, bridge->base + LINT_EN);
1467
1468         iowrite32(CA91CX42_LINT_LM[monitor],
1469                  bridge->base + LINT_STAT);
1470
1471         /* Detach callback */
1472         bridge->lm_callback[monitor] = NULL;
1473
1474         /* If all location monitors disabled, disable global Location Monitor */
1475         if ((tmp & (CA91CX42_LINT_LM0 | CA91CX42_LINT_LM1 | CA91CX42_LINT_LM2 |
1476                         CA91CX42_LINT_LM3)) == 0) {
1477                 tmp = ioread32(bridge->base + LM_CTL);
1478                 tmp &= ~CA91CX42_LM_CTL_EN;
1479                 iowrite32(tmp, bridge->base + LM_CTL);
1480         }
1481
1482         mutex_unlock(&lm->mtx);
1483
1484         return 0;
1485 }
1486
1487 static int ca91cx42_slot_get(struct vme_bridge *ca91cx42_bridge)
1488 {
1489         u32 slot = 0;
1490         struct ca91cx42_driver *bridge;
1491
1492         bridge = ca91cx42_bridge->driver_priv;
1493
1494         if (!geoid) {
1495                 slot = ioread32(bridge->base + VCSR_BS);
1496                 slot = ((slot & CA91CX42_VCSR_BS_SLOT_M) >> 27);
1497         } else
1498                 slot = geoid;
1499
1500         return (int)slot;
1501
1502 }
1503
1504 static void *ca91cx42_alloc_consistent(struct device *parent, size_t size,
1505         dma_addr_t *dma)
1506 {
1507         struct pci_dev *pdev;
1508
1509         /* Find pci_dev container of dev */
1510         pdev = container_of(parent, struct pci_dev, dev);
1511
1512         return pci_alloc_consistent(pdev, size, dma);
1513 }
1514
1515 static void ca91cx42_free_consistent(struct device *parent, size_t size,
1516         void *vaddr, dma_addr_t dma)
1517 {
1518         struct pci_dev *pdev;
1519
1520         /* Find pci_dev container of dev */
1521         pdev = container_of(parent, struct pci_dev, dev);
1522
1523         pci_free_consistent(pdev, size, vaddr, dma);
1524 }
1525
1526 static int __init ca91cx42_init(void)
1527 {
1528         return pci_register_driver(&ca91cx42_driver);
1529 }
1530
1531 /*
1532  * Configure CR/CSR space
1533  *
1534  * Access to the CR/CSR can be configured at power-up. The location of the
1535  * CR/CSR registers in the CR/CSR address space is determined by the boards
1536  * Auto-ID or Geographic address. This function ensures that the window is
1537  * enabled at an offset consistent with the boards geopgraphic address.
1538  */
1539 static int ca91cx42_crcsr_init(struct vme_bridge *ca91cx42_bridge,
1540         struct pci_dev *pdev)
1541 {
1542         unsigned int crcsr_addr;
1543         int tmp, slot;
1544         struct ca91cx42_driver *bridge;
1545
1546         bridge = ca91cx42_bridge->driver_priv;
1547
1548         slot = ca91cx42_slot_get(ca91cx42_bridge);
1549
1550         /* Write CSR Base Address if slot ID is supplied as a module param */
1551         if (geoid)
1552                 iowrite32(geoid << 27, bridge->base + VCSR_BS);
1553
1554         dev_info(&pdev->dev, "CR/CSR Offset: %d\n", slot);
1555         if (slot == 0) {
1556                 dev_err(&pdev->dev, "Slot number is unset, not configuring "
1557                         "CR/CSR space\n");
1558                 return -EINVAL;
1559         }
1560
1561         /* Allocate mem for CR/CSR image */
1562         bridge->crcsr_kernel = pci_alloc_consistent(pdev, VME_CRCSR_BUF_SIZE,
1563                 &bridge->crcsr_bus);
1564         if (bridge->crcsr_kernel == NULL) {
1565                 dev_err(&pdev->dev, "Failed to allocate memory for CR/CSR "
1566                         "image\n");
1567                 return -ENOMEM;
1568         }
1569
1570         memset(bridge->crcsr_kernel, 0, VME_CRCSR_BUF_SIZE);
1571
1572         crcsr_addr = slot * (512 * 1024);
1573         iowrite32(bridge->crcsr_bus - crcsr_addr, bridge->base + VCSR_TO);
1574
1575         tmp = ioread32(bridge->base + VCSR_CTL);
1576         tmp |= CA91CX42_VCSR_CTL_EN;
1577         iowrite32(tmp, bridge->base + VCSR_CTL);
1578
1579         return 0;
1580 }
1581
1582 static void ca91cx42_crcsr_exit(struct vme_bridge *ca91cx42_bridge,
1583         struct pci_dev *pdev)
1584 {
1585         u32 tmp;
1586         struct ca91cx42_driver *bridge;
1587
1588         bridge = ca91cx42_bridge->driver_priv;
1589
1590         /* Turn off CR/CSR space */
1591         tmp = ioread32(bridge->base + VCSR_CTL);
1592         tmp &= ~CA91CX42_VCSR_CTL_EN;
1593         iowrite32(tmp, bridge->base + VCSR_CTL);
1594
1595         /* Free image */
1596         iowrite32(0, bridge->base + VCSR_TO);
1597
1598         pci_free_consistent(pdev, VME_CRCSR_BUF_SIZE, bridge->crcsr_kernel,
1599                 bridge->crcsr_bus);
1600 }
1601
1602 static int ca91cx42_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1603 {
1604         int retval, i;
1605         u32 data;
1606         struct list_head *pos = NULL;
1607         struct vme_bridge *ca91cx42_bridge;
1608         struct ca91cx42_driver *ca91cx42_device;
1609         struct vme_master_resource *master_image;
1610         struct vme_slave_resource *slave_image;
1611         struct vme_dma_resource *dma_ctrlr;
1612         struct vme_lm_resource *lm;
1613
1614         /* We want to support more than one of each bridge so we need to
1615          * dynamically allocate the bridge structure
1616          */
1617         ca91cx42_bridge = kzalloc(sizeof(struct vme_bridge), GFP_KERNEL);
1618
1619         if (ca91cx42_bridge == NULL) {
1620                 dev_err(&pdev->dev, "Failed to allocate memory for device "
1621                         "structure\n");
1622                 retval = -ENOMEM;
1623                 goto err_struct;
1624         }
1625
1626         ca91cx42_device = kzalloc(sizeof(struct ca91cx42_driver), GFP_KERNEL);
1627
1628         if (ca91cx42_device == NULL) {
1629                 dev_err(&pdev->dev, "Failed to allocate memory for device "
1630                         "structure\n");
1631                 retval = -ENOMEM;
1632                 goto err_driver;
1633         }
1634
1635         ca91cx42_bridge->driver_priv = ca91cx42_device;
1636
1637         /* Enable the device */
1638         retval = pci_enable_device(pdev);
1639         if (retval) {
1640                 dev_err(&pdev->dev, "Unable to enable device\n");
1641                 goto err_enable;
1642         }
1643
1644         /* Map Registers */
1645         retval = pci_request_regions(pdev, driver_name);
1646         if (retval) {
1647                 dev_err(&pdev->dev, "Unable to reserve resources\n");
1648                 goto err_resource;
1649         }
1650
1651         /* map registers in BAR 0 */
1652         ca91cx42_device->base = ioremap_nocache(pci_resource_start(pdev, 0),
1653                 4096);
1654         if (!ca91cx42_device->base) {
1655                 dev_err(&pdev->dev, "Unable to remap CRG region\n");
1656                 retval = -EIO;
1657                 goto err_remap;
1658         }
1659
1660         /* Check to see if the mapping worked out */
1661         data = ioread32(ca91cx42_device->base + CA91CX42_PCI_ID) & 0x0000FFFF;
1662         if (data != PCI_VENDOR_ID_TUNDRA) {
1663                 dev_err(&pdev->dev, "PCI_ID check failed\n");
1664                 retval = -EIO;
1665                 goto err_test;
1666         }
1667
1668         /* Initialize wait queues & mutual exclusion flags */
1669         init_waitqueue_head(&ca91cx42_device->dma_queue);
1670         init_waitqueue_head(&ca91cx42_device->iack_queue);
1671         mutex_init(&ca91cx42_device->vme_int);
1672         mutex_init(&ca91cx42_device->vme_rmw);
1673
1674         ca91cx42_bridge->parent = &pdev->dev;
1675         strcpy(ca91cx42_bridge->name, driver_name);
1676
1677         /* Setup IRQ */
1678         retval = ca91cx42_irq_init(ca91cx42_bridge);
1679         if (retval != 0) {
1680                 dev_err(&pdev->dev, "Chip Initialization failed.\n");
1681                 goto err_irq;
1682         }
1683
1684         /* Add master windows to list */
1685         INIT_LIST_HEAD(&ca91cx42_bridge->master_resources);
1686         for (i = 0; i < CA91C142_MAX_MASTER; i++) {
1687                 master_image = kmalloc(sizeof(struct vme_master_resource),
1688                         GFP_KERNEL);
1689                 if (master_image == NULL) {
1690                         dev_err(&pdev->dev, "Failed to allocate memory for "
1691                         "master resource structure\n");
1692                         retval = -ENOMEM;
1693                         goto err_master;
1694                 }
1695                 master_image->parent = ca91cx42_bridge;
1696                 spin_lock_init(&master_image->lock);
1697                 master_image->locked = 0;
1698                 master_image->number = i;
1699                 master_image->address_attr = VME_A16 | VME_A24 | VME_A32 |
1700                         VME_CRCSR | VME_USER1 | VME_USER2;
1701                 master_image->cycle_attr = VME_SCT | VME_BLT | VME_MBLT |
1702                         VME_SUPER | VME_USER | VME_PROG | VME_DATA;
1703                 master_image->width_attr = VME_D8 | VME_D16 | VME_D32 | VME_D64;
1704                 memset(&master_image->bus_resource, 0,
1705                         sizeof(struct resource));
1706                 master_image->kern_base  = NULL;
1707                 list_add_tail(&master_image->list,
1708                         &ca91cx42_bridge->master_resources);
1709         }
1710
1711         /* Add slave windows to list */
1712         INIT_LIST_HEAD(&ca91cx42_bridge->slave_resources);
1713         for (i = 0; i < CA91C142_MAX_SLAVE; i++) {
1714                 slave_image = kmalloc(sizeof(struct vme_slave_resource),
1715                         GFP_KERNEL);
1716                 if (slave_image == NULL) {
1717                         dev_err(&pdev->dev, "Failed to allocate memory for "
1718                         "slave resource structure\n");
1719                         retval = -ENOMEM;
1720                         goto err_slave;
1721                 }
1722                 slave_image->parent = ca91cx42_bridge;
1723                 mutex_init(&slave_image->mtx);
1724                 slave_image->locked = 0;
1725                 slave_image->number = i;
1726                 slave_image->address_attr = VME_A24 | VME_A32 | VME_USER1 |
1727                         VME_USER2;
1728
1729                 /* Only windows 0 and 4 support A16 */
1730                 if (i == 0 || i == 4)
1731                         slave_image->address_attr |= VME_A16;
1732
1733                 slave_image->cycle_attr = VME_SCT | VME_BLT | VME_MBLT |
1734                         VME_SUPER | VME_USER | VME_PROG | VME_DATA;
1735                 list_add_tail(&slave_image->list,
1736                         &ca91cx42_bridge->slave_resources);
1737         }
1738
1739         /* Add dma engines to list */
1740         INIT_LIST_HEAD(&ca91cx42_bridge->dma_resources);
1741         for (i = 0; i < CA91C142_MAX_DMA; i++) {
1742                 dma_ctrlr = kmalloc(sizeof(struct vme_dma_resource),
1743                         GFP_KERNEL);
1744                 if (dma_ctrlr == NULL) {
1745                         dev_err(&pdev->dev, "Failed to allocate memory for "
1746                         "dma resource structure\n");
1747                         retval = -ENOMEM;
1748                         goto err_dma;
1749                 }
1750                 dma_ctrlr->parent = ca91cx42_bridge;
1751                 mutex_init(&dma_ctrlr->mtx);
1752                 dma_ctrlr->locked = 0;
1753                 dma_ctrlr->number = i;
1754                 dma_ctrlr->route_attr = VME_DMA_VME_TO_MEM |
1755                         VME_DMA_MEM_TO_VME;
1756                 INIT_LIST_HEAD(&dma_ctrlr->pending);
1757                 INIT_LIST_HEAD(&dma_ctrlr->running);
1758                 list_add_tail(&dma_ctrlr->list,
1759                         &ca91cx42_bridge->dma_resources);
1760         }
1761
1762         /* Add location monitor to list */
1763         INIT_LIST_HEAD(&ca91cx42_bridge->lm_resources);
1764         lm = kmalloc(sizeof(struct vme_lm_resource), GFP_KERNEL);
1765         if (lm == NULL) {
1766                 dev_err(&pdev->dev, "Failed to allocate memory for "
1767                 "location monitor resource structure\n");
1768                 retval = -ENOMEM;
1769                 goto err_lm;
1770         }
1771         lm->parent = ca91cx42_bridge;
1772         mutex_init(&lm->mtx);
1773         lm->locked = 0;
1774         lm->number = 1;
1775         lm->monitors = 4;
1776         list_add_tail(&lm->list, &ca91cx42_bridge->lm_resources);
1777
1778         ca91cx42_bridge->slave_get = ca91cx42_slave_get;
1779         ca91cx42_bridge->slave_set = ca91cx42_slave_set;
1780         ca91cx42_bridge->master_get = ca91cx42_master_get;
1781         ca91cx42_bridge->master_set = ca91cx42_master_set;
1782         ca91cx42_bridge->master_read = ca91cx42_master_read;
1783         ca91cx42_bridge->master_write = ca91cx42_master_write;
1784         ca91cx42_bridge->master_rmw = ca91cx42_master_rmw;
1785         ca91cx42_bridge->dma_list_add = ca91cx42_dma_list_add;
1786         ca91cx42_bridge->dma_list_exec = ca91cx42_dma_list_exec;
1787         ca91cx42_bridge->dma_list_empty = ca91cx42_dma_list_empty;
1788         ca91cx42_bridge->irq_set = ca91cx42_irq_set;
1789         ca91cx42_bridge->irq_generate = ca91cx42_irq_generate;
1790         ca91cx42_bridge->lm_set = ca91cx42_lm_set;
1791         ca91cx42_bridge->lm_get = ca91cx42_lm_get;
1792         ca91cx42_bridge->lm_attach = ca91cx42_lm_attach;
1793         ca91cx42_bridge->lm_detach = ca91cx42_lm_detach;
1794         ca91cx42_bridge->slot_get = ca91cx42_slot_get;
1795         ca91cx42_bridge->alloc_consistent = ca91cx42_alloc_consistent;
1796         ca91cx42_bridge->free_consistent = ca91cx42_free_consistent;
1797
1798         data = ioread32(ca91cx42_device->base + MISC_CTL);
1799         dev_info(&pdev->dev, "Board is%s the VME system controller\n",
1800                 (data & CA91CX42_MISC_CTL_SYSCON) ? "" : " not");
1801         dev_info(&pdev->dev, "Slot ID is %d\n",
1802                 ca91cx42_slot_get(ca91cx42_bridge));
1803
1804         if (ca91cx42_crcsr_init(ca91cx42_bridge, pdev))
1805                 dev_err(&pdev->dev, "CR/CSR configuration failed.\n");
1806
1807         /* Need to save ca91cx42_bridge pointer locally in link list for use in
1808          * ca91cx42_remove()
1809          */
1810         retval = vme_register_bridge(ca91cx42_bridge);
1811         if (retval != 0) {
1812                 dev_err(&pdev->dev, "Chip Registration failed.\n");
1813                 goto err_reg;
1814         }
1815
1816         pci_set_drvdata(pdev, ca91cx42_bridge);
1817
1818         return 0;
1819
1820 err_reg:
1821         ca91cx42_crcsr_exit(ca91cx42_bridge, pdev);
1822 err_lm:
1823         /* resources are stored in link list */
1824         list_for_each(pos, &ca91cx42_bridge->lm_resources) {
1825                 lm = list_entry(pos, struct vme_lm_resource, list);
1826                 list_del(pos);
1827                 kfree(lm);
1828         }
1829 err_dma:
1830         /* resources are stored in link list */
1831         list_for_each(pos, &ca91cx42_bridge->dma_resources) {
1832                 dma_ctrlr = list_entry(pos, struct vme_dma_resource, list);
1833                 list_del(pos);
1834                 kfree(dma_ctrlr);
1835         }
1836 err_slave:
1837         /* resources are stored in link list */
1838         list_for_each(pos, &ca91cx42_bridge->slave_resources) {
1839                 slave_image = list_entry(pos, struct vme_slave_resource, list);
1840                 list_del(pos);
1841                 kfree(slave_image);
1842         }
1843 err_master:
1844         /* resources are stored in link list */
1845         list_for_each(pos, &ca91cx42_bridge->master_resources) {
1846                 master_image = list_entry(pos, struct vme_master_resource,
1847                         list);
1848                 list_del(pos);
1849                 kfree(master_image);
1850         }
1851
1852         ca91cx42_irq_exit(ca91cx42_device, pdev);
1853 err_irq:
1854 err_test:
1855         iounmap(ca91cx42_device->base);
1856 err_remap:
1857         pci_release_regions(pdev);
1858 err_resource:
1859         pci_disable_device(pdev);
1860 err_enable:
1861         kfree(ca91cx42_device);
1862 err_driver:
1863         kfree(ca91cx42_bridge);
1864 err_struct:
1865         return retval;
1866
1867 }
1868
1869 static void ca91cx42_remove(struct pci_dev *pdev)
1870 {
1871         struct list_head *pos = NULL;
1872         struct vme_master_resource *master_image;
1873         struct vme_slave_resource *slave_image;
1874         struct vme_dma_resource *dma_ctrlr;
1875         struct vme_lm_resource *lm;
1876         struct ca91cx42_driver *bridge;
1877         struct vme_bridge *ca91cx42_bridge = pci_get_drvdata(pdev);
1878
1879         bridge = ca91cx42_bridge->driver_priv;
1880
1881
1882         /* Turn off Ints */
1883         iowrite32(0, bridge->base + LINT_EN);
1884
1885         /* Turn off the windows */
1886         iowrite32(0x00800000, bridge->base + LSI0_CTL);
1887         iowrite32(0x00800000, bridge->base + LSI1_CTL);
1888         iowrite32(0x00800000, bridge->base + LSI2_CTL);
1889         iowrite32(0x00800000, bridge->base + LSI3_CTL);
1890         iowrite32(0x00800000, bridge->base + LSI4_CTL);
1891         iowrite32(0x00800000, bridge->base + LSI5_CTL);
1892         iowrite32(0x00800000, bridge->base + LSI6_CTL);
1893         iowrite32(0x00800000, bridge->base + LSI7_CTL);
1894         iowrite32(0x00F00000, bridge->base + VSI0_CTL);
1895         iowrite32(0x00F00000, bridge->base + VSI1_CTL);
1896         iowrite32(0x00F00000, bridge->base + VSI2_CTL);
1897         iowrite32(0x00F00000, bridge->base + VSI3_CTL);
1898         iowrite32(0x00F00000, bridge->base + VSI4_CTL);
1899         iowrite32(0x00F00000, bridge->base + VSI5_CTL);
1900         iowrite32(0x00F00000, bridge->base + VSI6_CTL);
1901         iowrite32(0x00F00000, bridge->base + VSI7_CTL);
1902
1903         vme_unregister_bridge(ca91cx42_bridge);
1904
1905         ca91cx42_crcsr_exit(ca91cx42_bridge, pdev);
1906
1907         /* resources are stored in link list */
1908         list_for_each(pos, &ca91cx42_bridge->lm_resources) {
1909                 lm = list_entry(pos, struct vme_lm_resource, list);
1910                 list_del(pos);
1911                 kfree(lm);
1912         }
1913
1914         /* resources are stored in link list */
1915         list_for_each(pos, &ca91cx42_bridge->dma_resources) {
1916                 dma_ctrlr = list_entry(pos, struct vme_dma_resource, list);
1917                 list_del(pos);
1918                 kfree(dma_ctrlr);
1919         }
1920
1921         /* resources are stored in link list */
1922         list_for_each(pos, &ca91cx42_bridge->slave_resources) {
1923                 slave_image = list_entry(pos, struct vme_slave_resource, list);
1924                 list_del(pos);
1925                 kfree(slave_image);
1926         }
1927
1928         /* resources are stored in link list */
1929         list_for_each(pos, &ca91cx42_bridge->master_resources) {
1930                 master_image = list_entry(pos, struct vme_master_resource,
1931                         list);
1932                 list_del(pos);
1933                 kfree(master_image);
1934         }
1935
1936         ca91cx42_irq_exit(bridge, pdev);
1937
1938         iounmap(bridge->base);
1939
1940         pci_release_regions(pdev);
1941
1942         pci_disable_device(pdev);
1943
1944         kfree(ca91cx42_bridge);
1945 }
1946
1947 static void __exit ca91cx42_exit(void)
1948 {
1949         pci_unregister_driver(&ca91cx42_driver);
1950 }
1951
1952 MODULE_PARM_DESC(geoid, "Override geographical addressing");
1953 module_param(geoid, int, 0);
1954
1955 MODULE_DESCRIPTION("VME driver for the Tundra Universe II VME bridge");
1956 MODULE_LICENSE("GPL");
1957
1958 module_init(ca91cx42_init);
1959 module_exit(ca91cx42_exit);