76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
/*
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* arch/arch/mach-ixp4xx/fsg-pci.c
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*
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* FSG board-level PCI initialization
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*
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* Author: Rod Whitby <rod@whitby.id.au>
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* Maintainer: http://www.nslu2-linux.org/
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*
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* based on ixdp425-pci.c:
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* Copyright (C) 2002 Intel Corporation.
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* Copyright (C) 2003-2004 MontaVista Software, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/irq.h>
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#include <asm/mach/pci.h>
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#include <asm/mach-types.h>
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#define MAX_DEV 3
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#define IRQ_LINES 3
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/* PCI controller GPIO to IRQ pin mappings */
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#define INTA 6
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#define INTB 7
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#define INTC 5
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void __init fsg_pci_preinit(void)
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{
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set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
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set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
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set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW);
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ixp4xx_pci_preinit();
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}
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static int __init fsg_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
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{
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static int pci_irq_table[IRQ_LINES] = {
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IXP4XX_GPIO_IRQ(INTC),
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IXP4XX_GPIO_IRQ(INTB),
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IXP4XX_GPIO_IRQ(INTA),
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};
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int irq = -1;
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slot -= 11;
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if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
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irq = pci_irq_table[slot - 1];
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printk(KERN_INFO "%s: Mapped slot %d pin %d to IRQ %d\n",
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__func__, slot, pin, irq);
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return irq;
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}
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struct hw_pci fsg_pci __initdata = {
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.nr_controllers = 1,
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.preinit = fsg_pci_preinit,
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.swizzle = pci_std_swizzle,
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.setup = ixp4xx_setup,
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.scan = ixp4xx_scan_bus,
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.map_irq = fsg_map_irq,
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};
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int __init fsg_pci_init(void)
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{
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if (machine_is_fsg())
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pci_common_init(&fsg_pci);
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return 0;
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}
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subsys_initcall(fsg_pci_init);
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