mirror of https://gitee.com/openkylin/linux.git
79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
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/*
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* arch/arm/mach-ixp4xx/avila-pci.c
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*
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* Gateworks Avila board-level PCI initialization
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*
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* Author: Michael-Luke Jones <mlj28@cam.ac.uk>
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*
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* Based on ixdp-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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* 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 <asm/hardware.h>
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#include <asm/mach-types.h>
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void __init avila_pci_preinit(void)
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{
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set_irq_type(IRQ_AVILA_PCI_INTA, IRQT_LOW);
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set_irq_type(IRQ_AVILA_PCI_INTB, IRQT_LOW);
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set_irq_type(IRQ_AVILA_PCI_INTC, IRQT_LOW);
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set_irq_type(IRQ_AVILA_PCI_INTD, IRQT_LOW);
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ixp4xx_pci_preinit();
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}
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static int __init avila_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
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{
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static int pci_irq_table[AVILA_PCI_IRQ_LINES] = {
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IRQ_AVILA_PCI_INTA,
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IRQ_AVILA_PCI_INTB,
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IRQ_AVILA_PCI_INTC,
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IRQ_AVILA_PCI_INTD
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};
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int irq = -1;
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if (slot >= 1 &&
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slot <= (machine_is_loft() ? LOFT_PCI_MAX_DEV : AVILA_PCI_MAX_DEV) &&
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pin >= 1 && pin <= AVILA_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 avila_pci __initdata = {
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.nr_controllers = 1,
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.preinit = avila_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 = avila_map_irq,
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};
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int __init avila_pci_init(void)
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{
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if (machine_is_avila() || machine_is_loft())
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pci_common_init(&avila_pci);
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return 0;
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}
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subsys_initcall(avila_pci_init);
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