a7918f39bb
Patch from Alessandro Zummo This patch adds support for the LinkSys NSLU2 running with both big and little-endian kernels. The LinkSys NSLU2 is a cost engineered ARM, XScale 420 based system similar to the the Intel IXDP425 evaluation board. It uses the IXP4XX ARCH. While this patch applies independently of other patches the resultant kernel requires further patches to successfully use onboard devices, including the onboard flash. Since these patches are independent of this one they will be submitted separately. A defconfig is not included here because not all of the required drivers are actually in the kernel. We intend to provide one as soon as the patches will be incorporated in mainstream. This patch is the combined work of nslu2-linux.org Signed-off-by: John Bowler <jbowler@acm.org> Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
/*
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* arch/arm/mach-ixp4xx/nslu2-pci.c
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*
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* NSLU2 board-level PCI initialization
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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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* Maintainer: http://www.nslu2-linux.org/
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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/config.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <asm/mach/pci.h>
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#include <asm/mach-types.h>
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void __init nslu2_pci_preinit(void)
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{
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set_irq_type(IRQ_NSLU2_PCI_INTA, IRQT_LOW);
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set_irq_type(IRQ_NSLU2_PCI_INTB, IRQT_LOW);
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set_irq_type(IRQ_NSLU2_PCI_INTC, IRQT_LOW);
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gpio_line_isr_clear(NSLU2_PCI_INTA_PIN);
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gpio_line_isr_clear(NSLU2_PCI_INTB_PIN);
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gpio_line_isr_clear(NSLU2_PCI_INTC_PIN);
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/* INTD is not configured as GPIO is used
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* for the power input button.
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*/
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ixp4xx_pci_preinit();
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}
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static int __init nslu2_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
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{
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static int pci_irq_table[NSLU2_PCI_IRQ_LINES] = {
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IRQ_NSLU2_PCI_INTA,
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IRQ_NSLU2_PCI_INTB,
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IRQ_NSLU2_PCI_INTC,
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};
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int irq = -1;
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if (slot >= 1 && slot <= NSLU2_PCI_MAX_DEV &&
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pin >= 1 && pin <= NSLU2_PCI_IRQ_LINES) {
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irq = pci_irq_table[(slot + pin - 2) % NSLU2_PCI_IRQ_LINES];
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}
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return irq;
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}
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struct hw_pci __initdata nslu2_pci = {
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.nr_controllers = 1,
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.preinit = nslu2_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 = nslu2_map_irq,
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};
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int __init nslu2_pci_init(void) /* monkey see, monkey do */
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{
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if (machine_is_nslu2())
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pci_common_init(&nslu2_pci);
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return 0;
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}
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subsys_initcall(nslu2_pci_init);
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