| /* |
| * arch/arm/mach-ixp4xx/avila-pci.c |
| * |
| * Gateworks Avila board-level PCI initialization |
| * |
| * Author: Michael-Luke Jones <mlj28@cam.ac.uk> |
| * |
| * Based on ixdp-pci.c |
| * Copyright (C) 2002 Intel Corporation. |
| * Copyright (C) 2003-2004 MontaVista Software, Inc. |
| * |
| * Maintainer: Deepak Saxena <dsaxena@plexity.net> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/pci.h> |
| #include <linux/init.h> |
| #include <linux/irq.h> |
| #include <linux/delay.h> |
| #include <asm/mach/pci.h> |
| #include <asm/irq.h> |
| #include <mach/hardware.h> |
| #include <asm/mach-types.h> |
| |
| #define AVILA_MAX_DEV 4 |
| #define LOFT_MAX_DEV 6 |
| #define IRQ_LINES 4 |
| |
| /* PCI controller GPIO to IRQ pin mappings */ |
| #define INTA 11 |
| #define INTB 10 |
| #define INTC 9 |
| #define INTD 8 |
| |
| void __init avila_pci_preinit(void) |
| { |
| irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW); |
| irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW); |
| irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW); |
| irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW); |
| ixp4xx_pci_preinit(); |
| } |
| |
| static int __init avila_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
| { |
| static int pci_irq_table[IRQ_LINES] = { |
| IXP4XX_GPIO_IRQ(INTA), |
| IXP4XX_GPIO_IRQ(INTB), |
| IXP4XX_GPIO_IRQ(INTC), |
| IXP4XX_GPIO_IRQ(INTD) |
| }; |
| |
| if (slot >= 1 && |
| slot <= (machine_is_loft() ? LOFT_MAX_DEV : AVILA_MAX_DEV) && |
| pin >= 1 && pin <= IRQ_LINES) |
| return pci_irq_table[(slot + pin - 2) % 4]; |
| |
| return -1; |
| } |
| |
| struct hw_pci avila_pci __initdata = { |
| .nr_controllers = 1, |
| .ops = &ixp4xx_ops, |
| .preinit = avila_pci_preinit, |
| .setup = ixp4xx_setup, |
| .map_irq = avila_map_irq, |
| }; |
| |
| int __init avila_pci_init(void) |
| { |
| if (machine_is_avila() || machine_is_loft()) |
| pci_common_init(&avila_pci); |
| return 0; |
| } |
| |
| subsys_initcall(avila_pci_init); |