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fixups-dreamcast.c

/*
 * arch/sh/drivers/pci/fixups-dreamcast.c
 *
 * PCI fixups for the Sega Dreamcast
 *
 * Copyright (C) 2001, 2002  M. R. Brown
 * Copyright (C) 2002, 2003, 2006  Paul Mundt
 *
 * This file originally bore the message (with enclosed-$):
 *    Id: pci.c,v 1.3 2003/05/04 19:29:46 lethal Exp
 *    Dreamcast PCI: Supports SEGA Broadband Adaptor only.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>

#include <asm/io.h>
#include <asm/irq.h>
#include <mach/pci.h>

static void __init gapspci_fixup_resources(struct pci_dev *dev)
{
      struct pci_channel *p = board_pci_channels;

      printk(KERN_NOTICE "PCI: Fixing up device %s\n", pci_name(dev));

      switch (dev->device) {
      case PCI_DEVICE_ID_SEGA_BBA:
            /*
             * We also assume that dev->devfn == 0
             */
            dev->resource[1].start  = p->io_resource->start  + 0x100;
            dev->resource[1].end    = dev->resource[1].start + 0x200 - 1;
            /*
             * Redirect dma memory allocations to special memory window.
             */
            BUG_ON(!dma_declare_coherent_memory(&dev->dev,
                                    GAPSPCI_DMA_BASE,
                                    GAPSPCI_DMA_BASE,
                                    GAPSPCI_DMA_SIZE,
                                    DMA_MEMORY_MAP |
                                    DMA_MEMORY_EXCLUSIVE));
            break;
      default:
            printk("PCI: Failed resource fixup\n");
      }
}
DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, gapspci_fixup_resources);

int __init pcibios_map_platform_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
      /*
       * The interrupt routing semantics here are quite trivial.
       *
       * We basically only support one interrupt, so we only bother
       * updating a device's interrupt line with this single shared
       * interrupt. Keeps routing quite simple, doesn't it?
       */
      return GAPSPCI_IRQ;
}

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