From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001 From: root Date: Fri, 25 Dec 2015 04:40:36 +0000 Subject: initial_commit --- arch/arm/mach-ixp4xx/nslu2-pci.c | 72 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 arch/arm/mach-ixp4xx/nslu2-pci.c (limited to 'arch/arm/mach-ixp4xx/nslu2-pci.c') diff --git a/arch/arm/mach-ixp4xx/nslu2-pci.c b/arch/arm/mach-ixp4xx/nslu2-pci.c new file mode 100644 index 00000000..2e85f76b --- /dev/null +++ b/arch/arm/mach-ixp4xx/nslu2-pci.c @@ -0,0 +1,72 @@ +/* + * 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(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, + .swizzle = pci_std_swizzle, + .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); -- cgit v1.2.3