2 * arch/arm/mach-ixp4xx/nslu2-pci.c
4 * NSLU2 board-level PCI initialization
6 * based on ixdp425-pci.c:
7 * Copyright (C) 2002 Intel Corporation.
8 * Copyright (C) 2003-2004 MontaVista Software, Inc.
10 * Maintainer: http://www.nslu2-linux.org/
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
18 #include <linux/pci.h>
19 #include <linux/init.h>
20 #include <linux/irq.h>
21 #include <asm/mach/pci.h>
22 #include <asm/mach-types.h>
27 /* PCI controller GPIO to IRQ pin mappings */
33 void __init
nslu2_pci_preinit(void)
35 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA
), IRQ_TYPE_LEVEL_LOW
);
36 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB
), IRQ_TYPE_LEVEL_LOW
);
37 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC
), IRQ_TYPE_LEVEL_LOW
);
41 static int __init
nslu2_map_irq(struct pci_dev
*dev
, u8 slot
, u8 pin
)
43 static int pci_irq_table
[IRQ_LINES
] = {
44 IXP4XX_GPIO_IRQ(INTA
),
45 IXP4XX_GPIO_IRQ(INTB
),
46 IXP4XX_GPIO_IRQ(INTC
),
49 if (slot
>= 1 && slot
<= MAX_DEV
&& pin
>= 1 && pin
<= IRQ_LINES
)
50 return pci_irq_table
[(slot
+ pin
- 2) % IRQ_LINES
];
55 struct hw_pci __initdata nslu2_pci
= {
57 .preinit
= nslu2_pci_preinit
,
58 .swizzle
= pci_std_swizzle
,
59 .setup
= ixp4xx_setup
,
60 .scan
= ixp4xx_scan_bus
,
61 .map_irq
= nslu2_map_irq
,
64 int __init
nslu2_pci_init(void) /* monkey see, monkey do */
66 if (machine_is_nslu2())
67 pci_common_init(&nslu2_pci
);
72 subsys_initcall(nslu2_pci_init
);