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author | Anton Arapov <anton@redhat.com> | 2012-04-16 10:05:28 +0200 |
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committer | Anton Arapov <anton@redhat.com> | 2012-04-16 10:05:28 +0200 |
commit | b4b6116a13633898cf868f2f103c96a90c4c20f8 (patch) | |
tree | 93d1b7e2cfcdf473d8d4ff3ad141fa864f8491f6 /arch/arm/mach-ixp4xx/fsg-pci.c | |
parent | edd4be777c953e5faafc80d091d3084b4343f5d3 (diff) | |
download | kernel-uprobes-b4b6116a13633898cf868f2f103c96a90c4c20f8.tar.gz kernel-uprobes-b4b6116a13633898cf868f2f103c96a90c4c20f8.tar.xz kernel-uprobes-b4b6116a13633898cf868f2f103c96a90c4c20f8.zip |
fedora kernel: d9aad82f3319f3cfd1aebc01234254ef0c37ad84v3.3.2-1
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/arm/mach-ixp4xx/fsg-pci.c')
-rw-r--r-- | arch/arm/mach-ixp4xx/fsg-pci.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp4xx/fsg-pci.c b/arch/arm/mach-ixp4xx/fsg-pci.c new file mode 100644 index 00000000000..d2ac803328f --- /dev/null +++ b/arch/arm/mach-ixp4xx/fsg-pci.c @@ -0,0 +1,76 @@ +/* + * 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, + .preinit = fsg_pci_preinit, + .swizzle = pci_std_swizzle, + .setup = ixp4xx_setup, + .scan = ixp4xx_scan_bus, + .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); |