| /* |
| * arch/arch/mach-ixp4xx/fsg-pci.c |
| * |
| * FSG board-level PCI initialization |
| * |
| * Author: Rod Whitby <rod@whitby.id.au> |
| * Maintainer: http://www.nslu2-linux.org/ |
| * |
| * based on ixdp425-pci.c: |
| * Copyright (C) 2002 Intel Corporation. |
| * Copyright (C) 2003-2004 MontaVista Software, Inc. |
| * |
| * 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/pci.h> |
| #include <linux/init.h> |
| #include <linux/irq.h> |
| #include <asm/mach/pci.h> |
| #include <asm/mach-types.h> |
| |
| #define MAX_DEV 3 |
| #define IRQ_LINES 3 |
| |
| /* PCI controller GPIO to IRQ pin mappings */ |
| #define INTA 6 |
| #define INTB 7 |
| #define INTC 5 |
| |
| void __init fsg_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); |
| ixp4xx_pci_preinit(); |
| } |
| |
| static int __init fsg_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
| { |
| static int pci_irq_table[IRQ_LINES] = { |
| IXP4XX_GPIO_IRQ(INTC), |
| IXP4XX_GPIO_IRQ(INTB), |
| IXP4XX_GPIO_IRQ(INTA), |
| }; |
| |
| int irq = -1; |
| slot -= 11; |
| |
| if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES) |
| irq = pci_irq_table[slot - 1]; |
| printk(KERN_INFO "%s: Mapped slot %d pin %d to IRQ %d\n", |
| __func__, slot, pin, irq); |
| |
| return irq; |
| } |
| |
| struct hw_pci fsg_pci __initdata = { |
| .nr_controllers = 1, |
| .ops = &ixp4xx_ops, |
| .preinit = fsg_pci_preinit, |
| .setup = ixp4xx_setup, |
| .map_irq = fsg_map_irq, |
| }; |
| |
| int __init fsg_pci_init(void) |
| { |
| if (machine_is_fsg()) |
| pci_common_init(&fsg_pci); |
| return 0; |
| } |
| |
| subsys_initcall(fsg_pci_init); |