| Rod Whitby | 7e36e2f | 2008-04-01 10:53:23 +0100 | [diff] [blame] | 1 | /* |
| 2 | * arch/arch/mach-ixp4xx/fsg-pci.c |
| 3 | * |
| 4 | * FSG board-level PCI initialization |
| 5 | * |
| 6 | * Author: Rod Whitby <rod@whitby.id.au> |
| 7 | * Maintainer: http://www.nslu2-linux.org/ |
| 8 | * |
| 9 | * based on ixdp425-pci.c: |
| 10 | * Copyright (C) 2002 Intel Corporation. |
| 11 | * Copyright (C) 2003-2004 MontaVista Software, Inc. |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License version 2 as |
| 15 | * published by the Free Software Foundation. |
| 16 | * |
| 17 | */ |
| 18 | |
| 19 | #include <linux/pci.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/irq.h> |
| 22 | |
| 23 | #include <asm/mach/pci.h> |
| 24 | #include <asm/mach-types.h> |
| 25 | |
| 26 | void __init fsg_pci_preinit(void) |
| 27 | { |
| Dmitry Baryshkov | 6cab486 | 2008-07-27 04:23:31 +0100 | [diff] [blame] | 28 | set_irq_type(IRQ_FSG_PCI_INTA, IRQ_TYPE_LEVEL_LOW); |
| 29 | set_irq_type(IRQ_FSG_PCI_INTB, IRQ_TYPE_LEVEL_LOW); |
| 30 | set_irq_type(IRQ_FSG_PCI_INTC, IRQ_TYPE_LEVEL_LOW); |
| Rod Whitby | 7e36e2f | 2008-04-01 10:53:23 +0100 | [diff] [blame] | 31 | |
| 32 | ixp4xx_pci_preinit(); |
| 33 | } |
| 34 | |
| 35 | static int __init fsg_map_irq(struct pci_dev *dev, u8 slot, u8 pin) |
| 36 | { |
| 37 | static int pci_irq_table[FSG_PCI_IRQ_LINES] = { |
| 38 | IRQ_FSG_PCI_INTC, |
| 39 | IRQ_FSG_PCI_INTB, |
| 40 | IRQ_FSG_PCI_INTA, |
| 41 | }; |
| 42 | |
| 43 | int irq = -1; |
| 44 | slot = slot - 11; |
| 45 | |
| 46 | if (slot >= 1 && slot <= FSG_PCI_MAX_DEV && |
| 47 | pin >= 1 && pin <= FSG_PCI_IRQ_LINES) |
| 48 | irq = pci_irq_table[(slot - 1)]; |
| 49 | printk(KERN_INFO "%s: Mapped slot %d pin %d to IRQ %d\n", |
| 50 | __func__, slot, pin, irq); |
| 51 | |
| 52 | return irq; |
| 53 | } |
| 54 | |
| 55 | struct hw_pci fsg_pci __initdata = { |
| 56 | .nr_controllers = 1, |
| 57 | .preinit = fsg_pci_preinit, |
| 58 | .swizzle = pci_std_swizzle, |
| 59 | .setup = ixp4xx_setup, |
| 60 | .scan = ixp4xx_scan_bus, |
| 61 | .map_irq = fsg_map_irq, |
| 62 | }; |
| 63 | |
| 64 | int __init fsg_pci_init(void) |
| 65 | { |
| 66 | if (machine_is_fsg()) |
| 67 | pci_common_init(&fsg_pci); |
| 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | subsys_initcall(fsg_pci_init); |