[deliverable/linux.git] / arch / sh / drivers / pci / 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 = 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->resources[0].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(const 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;
}
Commit	Line	Data
1da177e4	1	/*
f30c2269	2	* arch/sh/drivers/pci/fixups-dreamcast.c
1da177e4 LT	3	*
	4	* PCI fixups for the Sega Dreamcast
	5	*
	6	* Copyright (C) 2001, 2002 M. R. Brown
959f85f8	7	* Copyright (C) 2002, 2003, 2006 Paul Mundt
1da177e4 LT	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
1da177e4 LT	18	#include <linux/sched.h>
	19	#include <linux/kernel.h>
	20	#include <linux/param.h>
	21	#include <linux/interrupt.h>
	22	#include <linux/init.h>
	23	#include <linux/irq.h>
	24	#include <linux/pci.h>
a724605c	25	#include <linux/dma-mapping.h>
1da177e4 LT	26
	27	#include <asm/io.h>
	28	#include <asm/irq.h>
f15cbe6f	29	#include <mach/pci.h>
1da177e4 LT	30
	31	static void __init gapspci_fixup_resources(struct pci_dev *dev)
	32	{
951a681b	33	struct pci_channel *p = dev->sysdata;
1da177e4 LT	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	*/
b6c58b1d	42	dev->resource[1].start = p->resources[0].start + 0x100;
1da177e4	43	dev->resource[1].end = dev->resource[1].start + 0x200 - 1;
d556fcc1 PM	44
	45	/*
	46	* This is not a normal BAR, prevent any attempts to move
	47	* the BAR, as this will result in a bus lock.
	48	*/
	49	dev->resource[1].flags \|= IORESOURCE_PCI_FIXED;
	50
a724605c MD	51	/*
	52	* Redirect dma memory allocations to special memory window.
	53	*/
	54	BUG_ON(!dma_declare_coherent_memory(&dev->dev,
	55	GAPSPCI_DMA_BASE,
	56	GAPSPCI_DMA_BASE,
	57	GAPSPCI_DMA_SIZE,
	58	DMA_MEMORY_MAP \|
	59	DMA_MEMORY_EXCLUSIVE));
1da177e4 LT	60	break;
	61	default:
	62	printk("PCI: Failed resource fixup\n");
	63	}
	64	}
1da177e4 LT	65	DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, gapspci_fixup_resources);
1da177e4 LT	66
d5341942	67	int __init pcibios_map_platform_irq(const struct pci_dev *dev, u8 slot, u8 pin)
1da177e4	68	{
959f85f8 PM	69	/*
	70	* The interrupt routing semantics here are quite trivial.
	71	*
	72	* We basically only support one interrupt, so we only bother
	73	* updating a device's interrupt line with this single shared
	74	* interrupt. Keeps routing quite simple, doesn't it?
1da177e4	75	*/
959f85f8	76	return GAPSPCI_IRQ;
1da177e4	77	}