1/* 2 * arch/arm/mach-ixp4xx/ixdp425-pci.c 3 * 4 * IXDP425 board-level PCI initialization 5 * 6 * Copyright (C) 2002 Intel Corporation. 7 * Copyright (C) 2003-2004 MontaVista Software, Inc. 8 * 9 * Maintainer: Deepak Saxena <dsaxena@plexity.net> 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 * 15 */ 16 17#include <linux/kernel.h> 18#include <linux/pci.h> 19#include <linux/init.h> 20#include <linux/irq.h> 21#include <linux/delay.h> 22 23#include <asm/mach/pci.h> 24#include <asm/irq.h> 25#include <asm/hardware.h> 26#include <asm/mach-types.h> 27 28void __init ixdp425_pci_preinit(void) 29{ 30 set_irq_type(IRQ_IXDP425_PCI_INTA, IRQT_LOW); 31 set_irq_type(IRQ_IXDP425_PCI_INTB, IRQT_LOW); 32 set_irq_type(IRQ_IXDP425_PCI_INTC, IRQT_LOW); 33 set_irq_type(IRQ_IXDP425_PCI_INTD, IRQT_LOW); 34 35 ixp4xx_pci_preinit(); 36} 37 38static int __init ixdp425_map_irq(struct pci_dev *dev, u8 slot, u8 pin) 39{ 40 static int pci_irq_table[IXDP425_PCI_IRQ_LINES] = { 41 IRQ_IXDP425_PCI_INTA, 42 IRQ_IXDP425_PCI_INTB, 43 IRQ_IXDP425_PCI_INTC, 44 IRQ_IXDP425_PCI_INTD 45 }; 46 47 int irq = -1; 48 49 if (slot >= 1 && slot <= IXDP425_PCI_MAX_DEV && 50 pin >= 1 && pin <= IXDP425_PCI_IRQ_LINES) { 51 irq = pci_irq_table[(slot + pin - 2) % 4]; 52 } 53 54 return irq; 55} 56 57struct hw_pci ixdp425_pci __initdata = { 58 .nr_controllers = 1, 59 .preinit = ixdp425_pci_preinit, 60 .swizzle = pci_std_swizzle, 61 .setup = ixp4xx_setup, 62 .scan = ixp4xx_scan_bus, 63 .map_irq = ixdp425_map_irq, 64}; 65 66int __init ixdp425_pci_init(void) 67{ 68 if (machine_is_ixdp425() || machine_is_ixcdp1100() || 69 machine_is_ixdp465() || machine_is_kixrp435()) 70 pci_common_init(&ixdp425_pci); 71 return 0; 72} 73 74subsys_initcall(ixdp425_pci_init); 75