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/*
* arch/arm/mach-ixp4xx/nas100d-pci.c
*
* NAS 100d board-level PCI initialization
*
* based on ixdp425-pci.c:
* Copyright (C) 2002 Intel Corporation.
* Copyright (C) 2003-2004 MontaVista Software, Inc.
*
* Maintainer: http://www.nslu2-linux.org/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <asm/mach/pci.h>
#include <asm/mach-types.h>
#define NAS100D_PCI_MAX_DEV 3
#define NAS100D_PCI_IRQ_LINES 3
/* PCI controller GPIO to IRQ pin mappings */
#define NAS100D_PCI_INTA_PIN 11
#define NAS100D_PCI_INTB_PIN 10
#define NAS100D_PCI_INTC_PIN 9
#define NAS100D_PCI_INTD_PIN 8
#define NAS100D_PCI_INTE_PIN 7
#define IRQ_NAS100D_PCI_INTA IRQ_IXP4XX_GPIO11
#define IRQ_NAS100D_PCI_INTB IRQ_IXP4XX_GPIO10
#define IRQ_NAS100D_PCI_INTC IRQ_IXP4XX_GPIO9
#define IRQ_NAS100D_PCI_INTD IRQ_IXP4XX_GPIO8
#define IRQ_NAS100D_PCI_INTE IRQ_IXP4XX_GPIO7
void __init nas100d_pci_preinit(void)
{
set_irq_type(IRQ_NAS100D_PCI_INTA, IRQ_TYPE_LEVEL_LOW);
set_irq_type(IRQ_NAS100D_PCI_INTB, IRQ_TYPE_LEVEL_LOW);
set_irq_type(IRQ_NAS100D_PCI_INTC, IRQ_TYPE_LEVEL_LOW);
set_irq_type(IRQ_NAS100D_PCI_INTD, IRQ_TYPE_LEVEL_LOW);
set_irq_type(IRQ_NAS100D_PCI_INTE, IRQ_TYPE_LEVEL_LOW);
ixp4xx_pci_preinit();
}
static int __init nas100d_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
static int pci_irq_table[NAS100D_PCI_MAX_DEV][NAS100D_PCI_IRQ_LINES] =
{
{ IRQ_NAS100D_PCI_INTA, -1, -1 },
{ IRQ_NAS100D_PCI_INTB, -1, -1 },
{ IRQ_NAS100D_PCI_INTC, IRQ_NAS100D_PCI_INTD, IRQ_NAS100D_PCI_INTE },
};
int irq = -1;
if (slot >= 1 && slot <= NAS100D_PCI_MAX_DEV &&
pin >= 1 && pin <= NAS100D_PCI_IRQ_LINES)
irq = pci_irq_table[slot-1][pin-1];
return irq;
}
struct hw_pci __initdata nas100d_pci = {
.nr_controllers = 1,
.preinit = nas100d_pci_preinit,
.swizzle = pci_std_swizzle,
.setup = ixp4xx_setup,
.scan = ixp4xx_scan_bus,
.map_irq = nas100d_map_irq,
};
int __init nas100d_pci_init(void)
{
if (machine_is_nas100d())
pci_common_init(&nas100d_pci);
return 0;
}
subsys_initcall(nas100d_pci_init);
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