diff options
Diffstat (limited to 'arch/sh/drivers/pci/fixups-dreamcast.c')
| -rw-r--r-- | arch/sh/drivers/pci/fixups-dreamcast.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/arch/sh/drivers/pci/fixups-dreamcast.c b/arch/sh/drivers/pci/fixups-dreamcast.c new file mode 100644 index 000000000000..cf30e2fa51be --- /dev/null +++ b/arch/sh/drivers/pci/fixups-dreamcast.c @@ -0,0 +1,81 @@ +/* + * arch/sh/pci/fixups-dreamcast.c + * + * PCI fixups for the Sega Dreamcast + * + * Copyright (C) 2001, 2002 M. R. Brown + * Copyright (C) 2002, 2003 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/config.h> +#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 <asm/io.h> +#include <asm/irq.h> +#include <asm/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; + break; + default: + printk("PCI: Failed resource fixup\n"); + } +} + +DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, gapspci_fixup_resources); + +void __init pcibios_fixup_bus(struct pci_bus *bus) +{ + /* + * We don't have any sub bus to fix up, and this is a rather + * stupid place to put general device fixups. Don't do it. + * Use the pcibios_fixups table or suffer the consequences. + */ +} + +void __init pcibios_fixup_irqs(void) +{ + struct pci_dev *dev = 0; + + for_each_pci_dev(dev) { + /* + * 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? + */ + printk(KERN_NOTICE "PCI: Fixing up IRQ routing for device %s\n", + pci_name(dev)); + + dev->irq = GAPSPCI_IRQ; + + pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq); + } +} + |