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#include <asm/mach/pci.h> 22#include <asm/mach-types.h> 23 24#define MAX_DEV 3 25#define IRQ_LINES 3 26 27/* PCI controller GPIO to IRQ pin mappings */ 28#define INTA 11 29#define INTB 10 30#define INTC 9 31#define INTD 8 32 33void __init nslu2_pci_preinit(void) 34{ 35 set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW); 36 set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW); 37 set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW); 38 ixp4xx_pci_preinit(); 39} 40 41static int __init nslu2_map_irq(struct pci_dev *dev, u8 slot, u8 pin) 42{ 43 static int pci_irq_table[IRQ_LINES] = { 44 IXP4XX_GPIO_IRQ(INTA), 45 IXP4XX_GPIO_IRQ(INTB), 46 IXP4XX_GPIO_IRQ(INTC), 47 }; 48 49 if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES) 50 return pci_irq_table[(slot + pin - 2) % IRQ_LINES]; 51 52 return -1; 53} 54 55struct hw_pci __initdata nslu2_pci = { 56 .nr_controllers = 1, 57 .preinit = nslu2_pci_preinit, 58 .swizzle = pci_std_swizzle, 59 .setup = ixp4xx_setup, 60 .scan = ixp4xx_scan_bus, 61 .map_irq = nslu2_map_irq, 62}; 63 64int __init nslu2_pci_init(void) /* monkey see, monkey do */ 65{ 66 if (machine_is_nslu2()) 67 pci_common_init(&nslu2_pci); 68 69 return 0; 70} 71 72subsys_initcall(nslu2_pci_init); 73