projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| a7918f39 AZ |
1 | /* |
| 2 | * arch/arm/mach-ixp4xx/nslu2-pci.c | |
| 3 | * | |
| 4 | * NSLU2 board-level PCI initialization | |
| 5 | * | |
| 6 | * based on ixdp425-pci.c: | |
| 7 | * Copyright (C) 2002 Intel Corporation. | |
| 8 | * Copyright (C) 2003-2004 MontaVista Software, Inc. | |
| 9 | * | |
| 10 | * Maintainer: http://www.nslu2-linux.org/ | |
| 11 | * | |
| 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. | |
| 15 | * | |
| 16 | */ | |
| 17 | ||
| a7918f39 AZ |
18 | #include <linux/pci.h> |
| 19 | #include <linux/init.h> | |
| f64c2c01 | 20 | #include <linux/irq.h> |
| a7918f39 AZ |
21 | #include <asm/mach/pci.h> |
| 22 | #include <asm/mach-types.h> | |
| 23 | ||
| 8d3fdf31 KH |
24 | #define MAX_DEV 3 |
| 25 | #define IRQ_LINES 3 | |
| c1117c63 KH |
26 | |
| 27 | /* PCI controller GPIO to IRQ pin mappings */ | |
| 8d3fdf31 KH |
28 | #define INTA 11 |
| 29 | #define INTB 10 | |
| 30 | #define INTC 9 | |
| 31 | #define INTD 8 | |
| c1117c63 | 32 | |
| a7918f39 AZ |
33 | void __init nslu2_pci_preinit(void) |
| 34 | { | |
| 6845664a TG |
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); | |
| a7918f39 AZ |
38 | ixp4xx_pci_preinit(); |
| 39 | } | |
| 40 | ||
| d5341942 | 41 | static int __init nslu2_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
| a7918f39 | 42 | { |
| 8d3fdf31 KH |
43 | static int pci_irq_table[IRQ_LINES] = { |
| 44 | IXP4XX_GPIO_IRQ(INTA), | |
| 45 | IXP4XX_GPIO_IRQ(INTB), | |
| 46 | IXP4XX_GPIO_IRQ(INTC), | |
| a7918f39 AZ |
47 | }; |
| 48 | ||
| 8d3fdf31 KH |
49 | if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES) |
| 50 | return pci_irq_table[(slot + pin - 2) % IRQ_LINES]; | |
| a7918f39 | 51 | |
| 8d3fdf31 | 52 | return -1; |
| a7918f39 AZ |
53 | } |
| 54 | ||
| 55 | struct hw_pci __initdata nslu2_pci = { | |
| 56 | .nr_controllers = 1, | |
| c23bfc38 | 57 | .ops = &ixp4xx_ops, |
| a7918f39 | 58 | .preinit = nslu2_pci_preinit, |
| a7918f39 | 59 | .setup = ixp4xx_setup, |
| a7918f39 AZ |
60 | .map_irq = nslu2_map_irq, |
| 61 | }; | |
| 62 | ||
| 63 | int __init nslu2_pci_init(void) /* monkey see, monkey do */ | |
| 64 | { | |
| 65 | if (machine_is_nslu2()) | |
| 66 | pci_common_init(&nslu2_pci); | |
| 67 | ||
| 68 | return 0; | |
| 69 | } | |
| 70 | ||
| 71 | subsys_initcall(nslu2_pci_init); |