1 // SPDX-License-Identifier: GPL-2.0-only
3 * arch/arm/mach-ixp4xx/ixdp425-pci.c
5 * IXDP425 board-level PCI initialization
7 * Copyright (C) 2002 Intel Corporation.
8 * Copyright (C) 2003-2004 MontaVista Software, Inc.
10 * Maintainer: Deepak Saxena <dsaxena@plexity.net>
13 #include <linux/kernel.h>
14 #include <linux/pci.h>
15 #include <linux/init.h>
16 #include <linux/irq.h>
17 #include <linux/delay.h>
18 #include <asm/mach/pci.h>
20 #include <mach/hardware.h>
21 #include <asm/mach-types.h>
28 /* PCI controller GPIO to IRQ pin mappings */
35 void __init
ixdp425_pci_preinit(void)
37 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA
), IRQ_TYPE_LEVEL_LOW
);
38 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB
), IRQ_TYPE_LEVEL_LOW
);
39 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC
), IRQ_TYPE_LEVEL_LOW
);
40 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD
), IRQ_TYPE_LEVEL_LOW
);
44 static int __init
ixdp425_map_irq(const struct pci_dev
*dev
, u8 slot
, u8 pin
)
46 static int pci_irq_table
[IRQ_LINES
] = {
47 IXP4XX_GPIO_IRQ(INTA
),
48 IXP4XX_GPIO_IRQ(INTB
),
49 IXP4XX_GPIO_IRQ(INTC
),
53 if (slot
>= 1 && slot
<= MAX_DEV
&& pin
>= 1 && pin
<= IRQ_LINES
)
54 return pci_irq_table
[(slot
+ pin
- 2) % 4];
59 struct hw_pci ixdp425_pci __initdata
= {
62 .preinit
= ixdp425_pci_preinit
,
63 .setup
= ixp4xx_setup
,
64 .map_irq
= ixdp425_map_irq
,
67 int __init
ixdp425_pci_init(void)
69 if (machine_is_ixdp425() || machine_is_ixcdp1100() ||
70 machine_is_ixdp465() || machine_is_kixrp435())
71 pci_common_init(&ixdp425_pci
);
75 subsys_initcall(ixdp425_pci_init
);