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ee977c2c MZ |
1 | /* |
2 | * arch/arch/mach-ixp4xx/vulcan-pci.c | |
3 | * | |
4 | * Vulcan board-level PCI initialization | |
5 | * | |
6 | * Copyright (C) 2010 Marc Zyngier <maz@misterjones.org> | |
7 | * | |
8 | * based on ixdp425-pci.c: | |
9 | * Copyright (C) 2002 Intel Corporation. | |
10 | * Copyright (C) 2003-2004 MontaVista Software, Inc. | |
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/pci.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/irq.h> | |
21 | #include <asm/mach/pci.h> | |
22 | #include <asm/mach-types.h> | |
23 | ||
24 | /* PCI controller GPIO to IRQ pin mappings */ | |
25 | #define INTA 2 | |
26 | #define INTB 3 | |
27 | ||
28 | void __init vulcan_pci_preinit(void) | |
29 | { | |
30 | #ifndef CONFIG_IXP4XX_INDIRECT_PCI | |
31 | /* | |
32 | * Cardbus bridge wants way more than the SoC can actually offer, | |
33 | * and leaves the whole PCI bus in a mess. Artificially limit it | |
34 | * to 8MB per region. Of course indirect mode doesn't have this | |
35 | * limitation... | |
36 | */ | |
37 | pci_cardbus_mem_size = SZ_8M; | |
38 | pr_info("Vulcan PCI: limiting CardBus memory size to %dMB\n", | |
39 | (int)(pci_cardbus_mem_size >> 20)); | |
40 | #endif | |
6845664a TG |
41 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW); |
42 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW); | |
ee977c2c MZ |
43 | ixp4xx_pci_preinit(); |
44 | } | |
45 | ||
d5341942 | 46 | static int __init vulcan_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
ee977c2c MZ |
47 | { |
48 | if (slot == 1) | |
49 | return IXP4XX_GPIO_IRQ(INTA); | |
50 | ||
51 | if (slot == 2) | |
52 | return IXP4XX_GPIO_IRQ(INTB); | |
53 | ||
54 | return -1; | |
55 | } | |
56 | ||
57 | struct hw_pci vulcan_pci __initdata = { | |
58 | .nr_controllers = 1, | |
c23bfc38 | 59 | .ops = &ixp4xx_ops, |
ee977c2c | 60 | .preinit = vulcan_pci_preinit, |
ee977c2c | 61 | .setup = ixp4xx_setup, |
ee977c2c MZ |
62 | .map_irq = vulcan_map_irq, |
63 | }; | |
64 | ||
65 | int __init vulcan_pci_init(void) | |
66 | { | |
67 | if (machine_is_arcom_vulcan()) | |
68 | pci_common_init(&vulcan_pci); | |
69 | return 0; | |
70 | } | |
71 | ||
72 | subsys_initcall(vulcan_pci_init); |