2 * arch/arm/mach-ixp4xx/nas100d-pci.c
4 * NAS 100d 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>
24 #define NAS100D_PCI_MAX_DEV 3
25 #define NAS100D_PCI_IRQ_LINES 3
27 /* PCI controller GPIO to IRQ pin mappings */
28 #define NAS100D_PCI_INTA_PIN 11
29 #define NAS100D_PCI_INTB_PIN 10
30 #define NAS100D_PCI_INTC_PIN 9
31 #define NAS100D_PCI_INTD_PIN 8
32 #define NAS100D_PCI_INTE_PIN 7
34 #define IRQ_NAS100D_PCI_INTA IRQ_IXP4XX_GPIO11
35 #define IRQ_NAS100D_PCI_INTB IRQ_IXP4XX_GPIO10
36 #define IRQ_NAS100D_PCI_INTC IRQ_IXP4XX_GPIO9
37 #define IRQ_NAS100D_PCI_INTD IRQ_IXP4XX_GPIO8
38 #define IRQ_NAS100D_PCI_INTE IRQ_IXP4XX_GPIO7
40 void __init nas100d_pci_preinit(void)
42 set_irq_type(IRQ_NAS100D_PCI_INTA, IRQ_TYPE_LEVEL_LOW);
43 set_irq_type(IRQ_NAS100D_PCI_INTB, IRQ_TYPE_LEVEL_LOW);
44 set_irq_type(IRQ_NAS100D_PCI_INTC, IRQ_TYPE_LEVEL_LOW);
45 set_irq_type(IRQ_NAS100D_PCI_INTD, IRQ_TYPE_LEVEL_LOW);
46 set_irq_type(IRQ_NAS100D_PCI_INTE, IRQ_TYPE_LEVEL_LOW);
51 static int __init nas100d_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
53 static int pci_irq_table[NAS100D_PCI_MAX_DEV][NAS100D_PCI_IRQ_LINES] =
55 { IRQ_NAS100D_PCI_INTA, -1, -1 },
56 { IRQ_NAS100D_PCI_INTB, -1, -1 },
57 { IRQ_NAS100D_PCI_INTC, IRQ_NAS100D_PCI_INTD, IRQ_NAS100D_PCI_INTE },
62 if (slot >= 1 && slot <= NAS100D_PCI_MAX_DEV &&
63 pin >= 1 && pin <= NAS100D_PCI_IRQ_LINES)
64 irq = pci_irq_table[slot-1][pin-1];
69 struct hw_pci __initdata nas100d_pci = {
71 .preinit = nas100d_pci_preinit,
72 .swizzle = pci_std_swizzle,
73 .setup = ixp4xx_setup,
74 .scan = ixp4xx_scan_bus,
75 .map_irq = nas100d_map_irq,
78 int __init nas100d_pci_init(void)
80 if (machine_is_nas100d())
81 pci_common_init(&nas100d_pci);
86 subsys_initcall(nas100d_pci_init);