/* * arch/arm/mach-ixp4xx/nslu2-pci.c * * NSLU2 board-level PCI initialization * * based on ixdp425-pci.c: * Copyright (C) 2002 Intel Corporation. * Copyright (C) 2003-2004 MontaVista Software, Inc. * * Maintainer: http://www.nslu2-linux.org/ * * 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 #include #include #include #include #define MAX_DEV 3 #define IRQ_LINES 3 /* PCI controller GPIO to IRQ pin mappings */ #define INTA 11 #define INTB 10 #define INTC 9 #define INTD 8 void __init nslu2_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 nslu2_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), }; if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES) return pci_irq_table[(slot + pin - 2) % IRQ_LINES]; return -1; } struct hw_pci __initdata nslu2_pci = { .nr_controllers = 1, .preinit = nslu2_pci_preinit, .setup = ixp4xx_setup, .scan = ixp4xx_scan_bus, .map_irq = nslu2_map_irq, }; int __init nslu2_pci_init(void) /* monkey see, monkey do */ { if (machine_is_nslu2()) pci_common_init(&nslu2_pci); return 0; } subsys_initcall(nslu2_pci_init);