/* * 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 = dev->sysdata; 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; /* * This is not a normal BAR, prevent any attempts to move * the BAR, as this will result in a bus lock. */ dev->resource[1].flags |= IORESOURCE_PCI_FIXED; /* * 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; }