88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/*
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* arch/arm/mach-ixp4xx/ixdp425-pci.c
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*
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* IXDP425 board-level PCI initialization
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*
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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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* Maintainer: Deepak Saxena <dsaxena@plexity.net>
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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/kernel.h>
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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 <linux/delay.h>
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#include <asm/mach/pci.h>
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#include <asm/irq.h>
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#include <mach/hardware.h>
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#include <asm/mach-types.h>
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#define IXDP425_PCI_MAX_DEV 4
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#define IXDP425_PCI_IRQ_LINES 4
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/* PCI controller GPIO to IRQ pin mappings */
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#define IXDP425_PCI_INTA_PIN 11
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#define IXDP425_PCI_INTB_PIN 10
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#define IXDP425_PCI_INTC_PIN 9
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#define IXDP425_PCI_INTD_PIN 8
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#define IRQ_IXDP425_PCI_INTA IRQ_IXP4XX_GPIO11
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#define IRQ_IXDP425_PCI_INTB IRQ_IXP4XX_GPIO10
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#define IRQ_IXDP425_PCI_INTC IRQ_IXP4XX_GPIO9
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#define IRQ_IXDP425_PCI_INTD IRQ_IXP4XX_GPIO8
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void __init ixdp425_pci_preinit(void)
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{
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set_irq_type(IRQ_IXDP425_PCI_INTA, IRQ_TYPE_LEVEL_LOW);
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set_irq_type(IRQ_IXDP425_PCI_INTB, IRQ_TYPE_LEVEL_LOW);
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set_irq_type(IRQ_IXDP425_PCI_INTC, IRQ_TYPE_LEVEL_LOW);
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set_irq_type(IRQ_IXDP425_PCI_INTD, IRQ_TYPE_LEVEL_LOW);
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ixp4xx_pci_preinit();
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}
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static int __init ixdp425_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
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{
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static int pci_irq_table[IXDP425_PCI_IRQ_LINES] = {
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IRQ_IXDP425_PCI_INTA,
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IRQ_IXDP425_PCI_INTB,
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IRQ_IXDP425_PCI_INTC,
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IRQ_IXDP425_PCI_INTD
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};
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int irq = -1;
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if (slot >= 1 && slot <= IXDP425_PCI_MAX_DEV &&
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pin >= 1 && pin <= IXDP425_PCI_IRQ_LINES) {
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irq = pci_irq_table[(slot + pin - 2) % 4];
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}
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return irq;
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}
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struct hw_pci ixdp425_pci __initdata = {
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.nr_controllers = 1,
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.preinit = ixdp425_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 = ixdp425_map_irq,
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};
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int __init ixdp425_pci_init(void)
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{
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if (machine_is_ixdp425() || machine_is_ixcdp1100() ||
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machine_is_ixdp465() || machine_is_kixrp435())
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pci_common_init(&ixdp425_pci);
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return 0;
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}
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subsys_initcall(ixdp425_pci_init);
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