11da177e4SLinus Torvalds /* 2f30c2269SUwe Zeisberger * arch/sh/drivers/pci/fixups-dreamcast.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * PCI fixups for the Sega Dreamcast 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Copyright (C) 2001, 2002 M. R. Brown 7959f85f8SPaul Mundt * Copyright (C) 2002, 2003, 2006 Paul Mundt 81da177e4SLinus Torvalds * 91da177e4SLinus Torvalds * This file originally bore the message (with enclosed-$): 101da177e4SLinus Torvalds * Id: pci.c,v 1.3 2003/05/04 19:29:46 lethal Exp 111da177e4SLinus Torvalds * Dreamcast PCI: Supports SEGA Broadband Adaptor only. 121da177e4SLinus Torvalds * 131da177e4SLinus Torvalds * This file is subject to the terms and conditions of the GNU General Public 141da177e4SLinus Torvalds * License. See the file "COPYING" in the main directory of this archive 151da177e4SLinus Torvalds * for more details. 161da177e4SLinus Torvalds */ 171da177e4SLinus Torvalds 181da177e4SLinus Torvalds #include <linux/sched.h> 191da177e4SLinus Torvalds #include <linux/kernel.h> 201da177e4SLinus Torvalds #include <linux/param.h> 211da177e4SLinus Torvalds #include <linux/interrupt.h> 221da177e4SLinus Torvalds #include <linux/init.h> 231da177e4SLinus Torvalds #include <linux/irq.h> 241da177e4SLinus Torvalds #include <linux/pci.h> 25a724605cSMagnus Damm #include <linux/dma-mapping.h> 261da177e4SLinus Torvalds 271da177e4SLinus Torvalds #include <asm/io.h> 281da177e4SLinus Torvalds #include <asm/irq.h> 29f15cbe6fSPaul Mundt #include <mach/pci.h> 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds static void __init gapspci_fixup_resources(struct pci_dev *dev) 321da177e4SLinus Torvalds { 33951a681bSPaul Mundt struct pci_channel *p = dev->sysdata; 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds printk(KERN_NOTICE "PCI: Fixing up device %s\n", pci_name(dev)); 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds switch (dev->device) { 381da177e4SLinus Torvalds case PCI_DEVICE_ID_SEGA_BBA: 391da177e4SLinus Torvalds /* 401da177e4SLinus Torvalds * We also assume that dev->devfn == 0 411da177e4SLinus Torvalds */ 42b6c58b1dSPaul Mundt dev->resource[1].start = p->resources[0].start + 0x100; 431da177e4SLinus Torvalds dev->resource[1].end = dev->resource[1].start + 0x200 - 1; 44d556fcc1SPaul Mundt 45d556fcc1SPaul Mundt /* 46d556fcc1SPaul Mundt * This is not a normal BAR, prevent any attempts to move 47d556fcc1SPaul Mundt * the BAR, as this will result in a bus lock. 48d556fcc1SPaul Mundt */ 49d556fcc1SPaul Mundt dev->resource[1].flags |= IORESOURCE_PCI_FIXED; 50d556fcc1SPaul Mundt 51a724605cSMagnus Damm /* 52a724605cSMagnus Damm * Redirect dma memory allocations to special memory window. 53a724605cSMagnus Damm */ 54a724605cSMagnus Damm BUG_ON(!dma_declare_coherent_memory(&dev->dev, 55a724605cSMagnus Damm GAPSPCI_DMA_BASE, 56a724605cSMagnus Damm GAPSPCI_DMA_BASE, 57a724605cSMagnus Damm GAPSPCI_DMA_SIZE, 58a724605cSMagnus Damm DMA_MEMORY_MAP | 59a724605cSMagnus Damm DMA_MEMORY_EXCLUSIVE)); 601da177e4SLinus Torvalds break; 611da177e4SLinus Torvalds default: 621da177e4SLinus Torvalds printk("PCI: Failed resource fixup\n"); 631da177e4SLinus Torvalds } 641da177e4SLinus Torvalds } 651da177e4SLinus Torvalds DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, gapspci_fixup_resources); 661da177e4SLinus Torvalds 67959f85f8SPaul Mundt int __init pcibios_map_platform_irq(struct pci_dev *dev, u8 slot, u8 pin) 681da177e4SLinus Torvalds { 691da177e4SLinus Torvalds /* 701da177e4SLinus Torvalds * The interrupt routing semantics here are quite trivial. 711da177e4SLinus Torvalds * 721da177e4SLinus Torvalds * We basically only support one interrupt, so we only bother 731da177e4SLinus Torvalds * updating a device's interrupt line with this single shared 741da177e4SLinus Torvalds * interrupt. Keeps routing quite simple, doesn't it? 751da177e4SLinus Torvalds */ 76959f85f8SPaul Mundt return GAPSPCI_IRQ; 771da177e4SLinus Torvalds } 78