1/* 2 * arch/arm/mach-ixp4xx/avila-pci.c 3 * 4 * Gateworks Avila board-level PCI initialization 5 * 6 * Author: Michael-Luke Jones <mlj28@cam.ac.uk> 7 * 8 * Based on ixdp-pci.c 9 * Copyright (C) 2002 Intel Corporation. 10 * Copyright (C) 2003-2004 MontaVista Software, Inc. 11 * 12 * Maintainer: Deepak Saxena <dsaxena@plexity.net> 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License version 2 as 16 * published by the Free Software Foundation. 17 * 18 */ 19 20#include <linux/kernel.h> 21#include <linux/pci.h> 22#include <linux/init.h> 23#include <linux/irq.h> 24#include <linux/delay.h> 25 26#include <asm/mach/pci.h> 27#include <asm/irq.h> 28#include <asm/hardware.h> 29#include <asm/mach-types.h> 30 31void __init avila_pci_preinit(void) 32{ 33 set_irq_type(IRQ_AVILA_PCI_INTA, IRQT_LOW); 34 set_irq_type(IRQ_AVILA_PCI_INTB, IRQT_LOW); 35 set_irq_type(IRQ_AVILA_PCI_INTC, IRQT_LOW); 36 set_irq_type(IRQ_AVILA_PCI_INTD, IRQT_LOW); 37 38 ixp4xx_pci_preinit(); 39} 40 41static int __init avila_map_irq(struct pci_dev *dev, u8 slot, u8 pin) 42{ 43 static int pci_irq_table[AVILA_PCI_IRQ_LINES] = { 44 IRQ_AVILA_PCI_INTA, 45 IRQ_AVILA_PCI_INTB, 46 IRQ_AVILA_PCI_INTC, 47 IRQ_AVILA_PCI_INTD 48 }; 49 50 int irq = -1; 51 52 if (slot >= 1 && 53 slot <= (machine_is_loft() ? LOFT_PCI_MAX_DEV : AVILA_PCI_MAX_DEV) && 54 pin >= 1 && pin <= AVILA_PCI_IRQ_LINES) { 55 irq = pci_irq_table[(slot + pin - 2) % 4]; 56 } 57 58 return irq; 59} 60 61struct hw_pci avila_pci __initdata = { 62 .nr_controllers = 1, 63 .preinit = avila_pci_preinit, 64 .swizzle = pci_std_swizzle, 65 .setup = ixp4xx_setup, 66 .scan = ixp4xx_scan_bus, 67 .map_irq = avila_map_irq, 68}; 69 70int __init avila_pci_init(void) 71{ 72 if (machine_is_avila() || machine_is_loft()) 73 pci_common_init(&avila_pci); 74 return 0; 75} 76 77subsys_initcall(avila_pci_init); 78