Release 4.11 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 gapspci_fixup_resources(struct pci_dev *dev)
{
	struct pci_channel *p = dev->sysdata;
	struct resource res;
	struct pci_bus_region region;

	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.
                 *
                 * If this GAPSPCI region were mapped by a BAR, the CPU
                 * phys_addr_t would be pci_resource_start(), and the bus
                 * address would be pci_bus_address(pci_resource_start()).
                 * But apparently there's no BAR mapping it, so we just
                 * "know" its CPU address is GAPSPCI_DMA_BASE.
                 */
		res.start = GAPSPCI_DMA_BASE;
		res.end = GAPSPCI_DMA_BASE + GAPSPCI_DMA_SIZE - 1;
		res.flags = IORESOURCE_MEM;
		pcibios_resource_to_bus(dev->bus, &region, &res);
		BUG_ON(!dma_declare_coherent_memory(&dev->dev,
						res.start,
						region.start,
						resource_size(&res),
						DMA_MEMORY_MAP |
						DMA_MEMORY_EXCLUSIVE));
		break;
	default:
		printk("PCI: Failed resource fixup\n");
	}
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
84
47.19%
1
16.67%
Björn Helgaas
55
30.90%
1
16.67%
Paul Mundt
20
11.24%
3
50.00%
Magnus Damm
19
10.67%
1
16.67%
Total
178
100.00%
6
100.00%

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;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Paul Mundt
12
54.55%
1
33.33%
Andrew Morton
9
40.91%
1
33.33%
Ralf Bächle
1
4.55%
1
33.33%
Total
22
100.00%
3
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
125
51.44%
1
9.09%
Björn Helgaas
55
22.63%
1
9.09%
Paul Mundt
33
13.58%
5
45.45%
Magnus Damm
22
9.05%
1
9.09%
David Woodhouse
6
2.47%
1
9.09%
Ralf Bächle
1
0.41%
1
9.09%
Uwe Zeisberger
1
0.41%
1
9.09%
Total
243
100.00%
11
100.00%
Directory: arch/sh/drivers/pci

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