| Alessandro Zummo | a7918f3 | 2005-11-10 14:05:04 +0000 | [diff] [blame^] | 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 | |
| 18 | #include <linux/config.h> |
| 19 | #include <linux/pci.h> |
| 20 | #include <linux/init.h> |
| 21 | |
| 22 | #include <asm/mach/pci.h> |
| 23 | #include <asm/mach-types.h> |
| 24 | |
| 25 | void __init nslu2_pci_preinit(void) |
| 26 | { |
| 27 | set_irq_type(IRQ_NSLU2_PCI_INTA, IRQT_LOW); |
| 28 | set_irq_type(IRQ_NSLU2_PCI_INTB, IRQT_LOW); |
| 29 | set_irq_type(IRQ_NSLU2_PCI_INTC, IRQT_LOW); |
| 30 | |
| 31 | gpio_line_isr_clear(NSLU2_PCI_INTA_PIN); |
| 32 | gpio_line_isr_clear(NSLU2_PCI_INTB_PIN); |
| 33 | gpio_line_isr_clear(NSLU2_PCI_INTC_PIN); |
| 34 | |
| 35 | /* INTD is not configured as GPIO is used |
| 36 | * for the power input button. |
| 37 | */ |
| 38 | |
| 39 | ixp4xx_pci_preinit(); |
| 40 | } |
| 41 | |
| 42 | static int __init nslu2_map_irq(struct pci_dev *dev, u8 slot, u8 pin) |
| 43 | { |
| 44 | static int pci_irq_table[NSLU2_PCI_IRQ_LINES] = { |
| 45 | IRQ_NSLU2_PCI_INTA, |
| 46 | IRQ_NSLU2_PCI_INTB, |
| 47 | IRQ_NSLU2_PCI_INTC, |
| 48 | }; |
| 49 | |
| 50 | int irq = -1; |
| 51 | |
| 52 | if (slot >= 1 && slot <= NSLU2_PCI_MAX_DEV && |
| 53 | pin >= 1 && pin <= NSLU2_PCI_IRQ_LINES) { |
| 54 | irq = pci_irq_table[(slot + pin - 2) % NSLU2_PCI_IRQ_LINES]; |
| 55 | } |
| 56 | |
| 57 | return irq; |
| 58 | } |
| 59 | |
| 60 | struct hw_pci __initdata nslu2_pci = { |
| 61 | .nr_controllers = 1, |
| 62 | .preinit = nslu2_pci_preinit, |
| 63 | .swizzle = pci_std_swizzle, |
| 64 | .setup = ixp4xx_setup, |
| 65 | .scan = ixp4xx_scan_bus, |
| 66 | .map_irq = nslu2_map_irq, |
| 67 | }; |
| 68 | |
| 69 | int __init nslu2_pci_init(void) /* monkey see, monkey do */ |
| 70 | { |
| 71 | if (machine_is_nslu2()) |
| 72 | pci_common_init(&nslu2_pci); |
| 73 | |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | subsys_initcall(nslu2_pci_init); |