| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * arch/arm/mach-ixp4xx/ixdp425-pci.c |
| 3 | * |
| 4 | * IXDP425 board-level PCI initialization |
| 5 | * |
| 6 | * Copyright (C) 2002 Intel Corporation. |
| 7 | * Copyright (C) 2003-2004 MontaVista Software, Inc. |
| 8 | * |
| 9 | * Maintainer: Deepak Saxena <dsaxena@plexity.net> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License version 2 as |
| 13 | * published by the Free Software Foundation. |
| 14 | * |
| 15 | */ |
| 16 | |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/config.h> |
| 19 | #include <linux/pci.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/delay.h> |
| 22 | |
| 23 | #include <asm/mach/pci.h> |
| 24 | #include <asm/irq.h> |
| 25 | #include <asm/hardware.h> |
| 26 | #include <asm/mach-types.h> |
| 27 | |
| 28 | void __init ixdp425_pci_preinit(void) |
| 29 | { |
| 30 | gpio_line_config(IXDP425_PCI_INTA_PIN, |
| 31 | IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW); |
| 32 | gpio_line_config(IXDP425_PCI_INTB_PIN, |
| 33 | IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW); |
| 34 | gpio_line_config(IXDP425_PCI_INTC_PIN, |
| 35 | IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW); |
| 36 | gpio_line_config(IXDP425_PCI_INTD_PIN, |
| 37 | IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW); |
| 38 | |
| 39 | gpio_line_isr_clear(IXDP425_PCI_INTA_PIN); |
| 40 | gpio_line_isr_clear(IXDP425_PCI_INTB_PIN); |
| 41 | gpio_line_isr_clear(IXDP425_PCI_INTC_PIN); |
| 42 | gpio_line_isr_clear(IXDP425_PCI_INTD_PIN); |
| 43 | |
| 44 | ixp4xx_pci_preinit(); |
| 45 | } |
| 46 | |
| 47 | static int __init ixdp425_map_irq(struct pci_dev *dev, u8 slot, u8 pin) |
| 48 | { |
| 49 | static int pci_irq_table[IXDP425_PCI_IRQ_LINES] = { |
| 50 | IRQ_IXDP425_PCI_INTA, |
| 51 | IRQ_IXDP425_PCI_INTB, |
| 52 | IRQ_IXDP425_PCI_INTC, |
| 53 | IRQ_IXDP425_PCI_INTD |
| 54 | }; |
| 55 | |
| 56 | int irq = -1; |
| 57 | |
| 58 | if (slot >= 1 && slot <= IXDP425_PCI_MAX_DEV && |
| 59 | pin >= 1 && pin <= IXDP425_PCI_IRQ_LINES) { |
| 60 | irq = pci_irq_table[(slot + pin - 2) % 4]; |
| 61 | } |
| 62 | |
| 63 | return irq; |
| 64 | } |
| 65 | |
| 66 | struct hw_pci ixdp425_pci __initdata = { |
| 67 | .nr_controllers = 1, |
| 68 | .preinit = ixdp425_pci_preinit, |
| 69 | .swizzle = pci_std_swizzle, |
| 70 | .setup = ixp4xx_setup, |
| 71 | .scan = ixp4xx_scan_bus, |
| 72 | .map_irq = ixdp425_map_irq, |
| 73 | }; |
| 74 | |
| 75 | int __init ixdp425_pci_init(void) |
| 76 | { |
| 77 | if (machine_is_ixdp425() || machine_is_ixcdp1100() || |
| 78 | machine_is_avila() || machine_is_ixdp465()) |
| 79 | pci_common_init(&ixdp425_pci); |
| 80 | return 0; |
| 81 | } |
| 82 | |
| 83 | subsys_initcall(ixdp425_pci_init); |
| 84 | |