1 /* 2 * arch/sh/pci/fixups-dreamcast.c 3 * 4 * PCI fixups for the Sega Dreamcast 5 * 6 * Copyright (C) 2001, 2002 M. R. Brown 7 * Copyright (C) 2002, 2003 Paul Mundt 8 * 9 * This file originally bore the message (with enclosed-$): 10 * Id: pci.c,v 1.3 2003/05/04 19:29:46 lethal Exp 11 * Dreamcast PCI: Supports SEGA Broadband Adaptor only. 12 * 13 * This file is subject to the terms and conditions of the GNU General Public 14 * License. See the file "COPYING" in the main directory of this archive 15 * for more details. 16 */ 17 18 #include <linux/config.h> 19 #include <linux/sched.h> 20 #include <linux/kernel.h> 21 #include <linux/param.h> 22 #include <linux/interrupt.h> 23 #include <linux/init.h> 24 #include <linux/irq.h> 25 #include <linux/pci.h> 26 27 #include <asm/io.h> 28 #include <asm/irq.h> 29 #include <asm/mach/pci.h> 30 31 static void __init gapspci_fixup_resources(struct pci_dev *dev) 32 { 33 struct pci_channel *p = board_pci_channels; 34 35 printk(KERN_NOTICE "PCI: Fixing up device %s\n", pci_name(dev)); 36 37 switch (dev->device) { 38 case PCI_DEVICE_ID_SEGA_BBA: 39 /* 40 * We also assume that dev->devfn == 0 41 */ 42 dev->resource[1].start = p->io_resource->start + 0x100; 43 dev->resource[1].end = dev->resource[1].start + 0x200 - 1; 44 break; 45 default: 46 printk("PCI: Failed resource fixup\n"); 47 } 48 } 49 50 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, gapspci_fixup_resources); 51 52 void __init pcibios_fixup_bus(struct pci_bus *bus) 53 { 54 /* 55 * We don't have any sub bus to fix up, and this is a rather 56 * stupid place to put general device fixups. Don't do it. 57 * Use the pcibios_fixups table or suffer the consequences. 58 */ 59 } 60 61 void __init pcibios_fixup_irqs(void) 62 { 63 struct pci_dev *dev = 0; 64 65 for_each_pci_dev(dev) { 66 /* 67 * The interrupt routing semantics here are quite trivial. 68 * 69 * We basically only support one interrupt, so we only bother 70 * updating a device's interrupt line with this single shared 71 * interrupt. Keeps routing quite simple, doesn't it? 72 */ 73 printk(KERN_NOTICE "PCI: Fixing up IRQ routing for device %s\n", 74 pci_name(dev)); 75 76 dev->irq = GAPSPCI_IRQ; 77 78 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq); 79 } 80 } 81 82