blob: 1176f9cb48650afc49d2a4565c6aa899bad3cbde [file] [log] [blame]
Thomas Gleixnerd2912cb2019-06-04 10:11:33 +02001// SPDX-License-Identifier: GPL-2.0-only
Rod Whitby3145d8a2006-01-04 17:17:11 +00002/*
3 * arch/arm/mach-ixp4xx/nas100d-pci.c
4 *
5 * NAS 100d board-level PCI initialization
6 *
7 * based on ixdp425-pci.c:
8 * Copyright (C) 2002 Intel Corporation.
9 * Copyright (C) 2003-2004 MontaVista Software, Inc.
10 *
11 * Maintainer: http://www.nslu2-linux.org/
Rod Whitby3145d8a2006-01-04 17:17:11 +000012 */
13
Rod Whitby3145d8a2006-01-04 17:17:11 +000014#include <linux/pci.h>
15#include <linux/init.h>
Thomas Gleixner698dfe22006-07-01 23:01:49 +010016#include <linux/irq.h>
Rod Whitby3145d8a2006-01-04 17:17:11 +000017#include <asm/mach/pci.h>
18#include <asm/mach-types.h>
19
Linus Walleijdc8ef8cd2018-12-29 15:47:52 +010020#include "irqs.h"
21
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010022#define MAX_DEV 3
23#define IRQ_LINES 3
Krzysztof Hałasa23fa6842009-11-16 16:06:47 +010024
25/* PCI controller GPIO to IRQ pin mappings */
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010026#define INTA 11
27#define INTB 10
28#define INTC 9
29#define INTD 8
30#define INTE 7
Krzysztof Hałasa23fa6842009-11-16 16:06:47 +010031
Rod Whitby3145d8a2006-01-04 17:17:11 +000032void __init nas100d_pci_preinit(void)
33{
Thomas Gleixner6845664a2011-03-24 13:25:22 +010034 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
35 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
36 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW);
37 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW);
38 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTE), IRQ_TYPE_LEVEL_LOW);
Rod Whitby3145d8a2006-01-04 17:17:11 +000039 ixp4xx_pci_preinit();
40}
41
Ralf Baechled5341942011-06-10 15:30:21 +010042static int __init nas100d_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
Rod Whitby3145d8a2006-01-04 17:17:11 +000043{
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010044 static int pci_irq_table[MAX_DEV][IRQ_LINES] = {
45 { IXP4XX_GPIO_IRQ(INTA), -1, -1 },
46 { IXP4XX_GPIO_IRQ(INTB), -1, -1 },
47 { IXP4XX_GPIO_IRQ(INTC), IXP4XX_GPIO_IRQ(INTD),
48 IXP4XX_GPIO_IRQ(INTE) },
Rod Whitby3145d8a2006-01-04 17:17:11 +000049 };
50
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010051 if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
52 return pci_irq_table[slot - 1][pin - 1];
Rod Whitby3145d8a2006-01-04 17:17:11 +000053
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010054 return -1;
Rod Whitby3145d8a2006-01-04 17:17:11 +000055}
56
57struct hw_pci __initdata nas100d_pci = {
58 .nr_controllers = 1,
Russell Kingc23bfc32012-03-10 12:49:16 +000059 .ops = &ixp4xx_ops,
Rod Whitby3145d8a2006-01-04 17:17:11 +000060 .preinit = nas100d_pci_preinit,
Rod Whitby3145d8a2006-01-04 17:17:11 +000061 .setup = ixp4xx_setup,
Rod Whitby3145d8a2006-01-04 17:17:11 +000062 .map_irq = nas100d_map_irq,
63};
64
65int __init nas100d_pci_init(void)
66{
67 if (machine_is_nas100d())
68 pci_common_init(&nas100d_pci);
69
70 return 0;
71}
72
73subsys_initcall(nas100d_pci_init);