| Richard Cochran | 2b8f011 | 2011-09-28 15:16:41 +0200 | [diff] [blame] | 1 | /* |
| 2 | * arch/arm/mach-ixp4xx/miccpt-pci.c |
| 3 | * |
| 4 | * MICCPT board-level PCI initialization |
| 5 | * |
| 6 | * Copyright (C) 2002 Intel Corporation. |
| 7 | * Copyright (C) 2003-2004 MontaVista Software, Inc. |
| 8 | * Copyright (C) 2006 OMICRON electronics GmbH |
| 9 | * |
| 10 | * Author: Michael Jochum <michael.jochum@omicron.at> |
| 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/kernel.h> |
| 19 | #include <linux/pci.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/delay.h> |
| 22 | #include <linux/irq.h> |
| 23 | #include <asm/mach/pci.h> |
| 24 | #include <asm/irq.h> |
| 25 | #include <mach/hardware.h> |
| 26 | #include <asm/mach-types.h> |
| 27 | |
| 28 | #define MAX_DEV 4 |
| 29 | #define IRQ_LINES 4 |
| 30 | |
| 31 | /* PCI controller GPIO to IRQ pin mappings */ |
| 32 | #define INTA 1 |
| 33 | #define INTB 2 |
| 34 | #define INTC 3 |
| 35 | #define INTD 4 |
| 36 | |
| 37 | |
| 38 | void __init miccpt_pci_preinit(void) |
| 39 | { |
| 40 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW); |
| 41 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW); |
| 42 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW); |
| 43 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW); |
| 44 | ixp4xx_pci_preinit(); |
| 45 | } |
| 46 | |
| 47 | static int __init miccpt_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
| 48 | { |
| 49 | static int pci_irq_table[IRQ_LINES] = { |
| 50 | IXP4XX_GPIO_IRQ(INTA), |
| 51 | IXP4XX_GPIO_IRQ(INTB), |
| 52 | IXP4XX_GPIO_IRQ(INTC), |
| 53 | IXP4XX_GPIO_IRQ(INTD) |
| 54 | }; |
| 55 | |
| 56 | if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES) |
| 57 | return pci_irq_table[(slot + pin - 2) % 4]; |
| 58 | |
| 59 | return -1; |
| 60 | } |
| 61 | |
| 62 | struct hw_pci miccpt_pci __initdata = { |
| 63 | .nr_controllers = 1, |
| Russell King | c23bfc3 | 2012-03-10 12:49:16 +0000 | [diff] [blame] | 64 | .ops = &ixp4xx_ops, |
| Richard Cochran | 2b8f011 | 2011-09-28 15:16:41 +0200 | [diff] [blame] | 65 | .preinit = miccpt_pci_preinit, |
| Richard Cochran | 2b8f011 | 2011-09-28 15:16:41 +0200 | [diff] [blame] | 66 | .setup = ixp4xx_setup, |
| Richard Cochran | 2b8f011 | 2011-09-28 15:16:41 +0200 | [diff] [blame] | 67 | .map_irq = miccpt_map_irq, |
| 68 | }; |
| 69 | |
| 70 | int __init miccpt_pci_init(void) |
| 71 | { |
| 72 | if (machine_is_miccpt()) |
| 73 | pci_common_init(&miccpt_pci); |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | subsys_initcall(miccpt_pci_init); |