1/* 2 * arch/arm/mach-ixp4xx/nslu2-pci.c 3 * 4 * NSLU2 board-level PCI initialization 5 * 6 * based on ixdp425-pci.c: 7 * Copyright (C) 2002 Intel Corporation. 8 * Copyright (C) 2003-2004 MontaVista Software, Inc. 9 * 10 * Maintainer: http://www.nslu2-linux.org/ 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License version 2 as 14 * published by the Free Software Foundation. 15 * 16 */ 17 18#include <linux/pci.h> 19#include <linux/init.h> 20#include <linux/irq.h> 21 22#include <asm/mach/pci.h> 23#include <asm/mach-types.h> 24 25void __init nslu2_pci_preinit(void) 26{ 27 set_irq_type(IRQ_NSLU2_PCI_INTA, IRQT_LOW); 28 set_irq_type(IRQ_NSLU2_PCI_INTB, IRQT_LOW); 29 set_irq_type(IRQ_NSLU2_PCI_INTC, IRQT_LOW); 30 31 ixp4xx_pci_preinit(); 32} 33 34static int __init nslu2_map_irq(struct pci_dev *dev, u8 slot, u8 pin) 35{ 36 static int pci_irq_table[NSLU2_PCI_IRQ_LINES] = { 37 IRQ_NSLU2_PCI_INTA, 38 IRQ_NSLU2_PCI_INTB, 39 IRQ_NSLU2_PCI_INTC, 40 }; 41 42 int irq = -1; 43 44 if (slot >= 1 && slot <= NSLU2_PCI_MAX_DEV && 45 pin >= 1 && pin <= NSLU2_PCI_IRQ_LINES) { 46 irq = pci_irq_table[(slot + pin - 2) % NSLU2_PCI_IRQ_LINES]; 47 } 48 49 return irq; 50} 51 52struct hw_pci __initdata nslu2_pci = { 53 .nr_controllers = 1, 54 .preinit = nslu2_pci_preinit, 55 .swizzle = pci_std_swizzle, 56 .setup = ixp4xx_setup, 57 .scan = ixp4xx_scan_bus, 58 .map_irq = nslu2_map_irq, 59}; 60 61int __init nslu2_pci_init(void) /* monkey see, monkey do */ 62{ 63 if (machine_is_nslu2()) 64 pci_common_init(&nslu2_pci); 65 66 return 0; 67} 68 69subsys_initcall(nslu2_pci_init); 70