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#include <asm/mach/pci.h> 23#include <asm/irq.h> 24#include <mach/hardware.h> 25#include <asm/mach-types.h> 26 27#define MAX_DEV 4 28#define IRQ_LINES 4 29 30/* PCI controller GPIO to IRQ pin mappings */ 31#define INTA 11 32#define INTB 10 33#define INTC 9 34#define INTD 8 35 36 37void __init ixdp425_pci_preinit(void) 38{ 39 set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW); 40 set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW); 41 set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW); 42 set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW); 43 ixp4xx_pci_preinit(); 44} 45 46static int __init ixdp425_map_irq(struct pci_dev *dev, u8 slot, u8 pin) 47{ 48 static int pci_irq_table[IRQ_LINES] = { 49 IXP4XX_GPIO_IRQ(INTA), 50 IXP4XX_GPIO_IRQ(INTB), 51 IXP4XX_GPIO_IRQ(INTC), 52 IXP4XX_GPIO_IRQ(INTD) 53 }; 54 55 if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES) 56 return pci_irq_table[(slot + pin - 2) % 4]; 57 58 return -1; 59} 60 61struct hw_pci ixdp425_pci __initdata = { 62 .nr_controllers = 1, 63 .preinit = ixdp425_pci_preinit, 64 .swizzle = pci_std_swizzle, 65 .setup = ixp4xx_setup, 66 .scan = ixp4xx_scan_bus, 67 .map_irq = ixdp425_map_irq, 68}; 69 70int __init ixdp425_pci_init(void) 71{ 72 if (machine_is_ixdp425() || machine_is_ixcdp1100() || 73 machine_is_ixdp465() || machine_is_kixrp435()) 74 pci_common_init(&ixdp425_pci); 75 return 0; 76} 77 78subsys_initcall(ixdp425_pci_init); 79