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-rw-r--r--arch/arm/mach-iop3xx/iq80332-pci.c125
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diff --git a/arch/arm/mach-iop3xx/iq80332-pci.c b/arch/arm/mach-iop3xx/iq80332-pci.c
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1/*
2 * arch/arm/mach-iop3xx/iq80332-pci.c
3 *
4 * PCI support for the Intel IQ80332 reference board
5 *
6 * Author: Dave Jiang <dave.jiang@intel.com>
7 * Copyright (C) 2004 Intel Corp.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13#include <linux/kernel.h>
14#include <linux/pci.h>
15#include <linux/init.h>
16
17#include <asm/hardware.h>
18#include <asm/irq.h>
19#include <asm/mach/pci.h>
20#include <asm/mach-types.h>
21
22/*
23 * The following macro is used to lookup irqs in a standard table
24 * format for those systems that do not already have PCI
25 * interrupts properly routed. We assume 1 <= pin <= 4
26 */
27#define PCI_IRQ_TABLE_LOOKUP(minid,maxid) \
28({ int _ctl_ = -1; \
29 unsigned int _idsel = idsel - minid; \
30 if (_idsel <= maxid) \
31 _ctl_ = pci_irq_table[_idsel][pin-1]; \
32 _ctl_; })
33
34#define INTA IRQ_IQ80332_INTA
35#define INTB IRQ_IQ80332_INTB
36#define INTC IRQ_IQ80332_INTC
37#define INTD IRQ_IQ80332_INTD
38
39//#define INTE IRQ_IQ80332_I82544
40
41static inline int __init
42iq80332_map_irq(struct pci_dev *dev, u8 idsel, u8 pin)
43{
44 static int pci_irq_table[][8] = {
45 /*
46 * PCI IDSEL/INTPIN->INTLINE
47 * A B C D
48 */
49 {-1, -1, -1, -1},
50 {-1, -1, -1, -1},
51 {-1, -1, -1, -1},
52 {INTA, INTB, INTC, INTD}, /* PCI-X Slot */
53 {-1, -1, -1, -1},
54 {INTC, INTC, INTC, INTC}, /* GigE */
55 {-1, -1, -1, -1},
56 {-1, -1, -1, -1},
57 };
58
59 BUG_ON(pin < 1 || pin > 4);
60
61 return PCI_IRQ_TABLE_LOOKUP(1, 7);
62}
63
64static int iq80332_setup(int nr, struct pci_sys_data *sys)
65{
66 struct resource *res;
67
68 if(nr != 0)
69 return 0;
70
71 res = kmalloc(sizeof(struct resource) * 2, GFP_KERNEL);
72 if (!res)
73 panic("PCI: unable to alloc resources");
74
75 memset(res, 0, sizeof(struct resource) * 2);
76
77 res[0].start = IOP331_PCI_LOWER_IO_VA;
78 res[0].end = IOP331_PCI_UPPER_IO_VA;
79 res[0].name = "IQ80332 PCI I/O Space";
80 res[0].flags = IORESOURCE_IO;
81
82 res[1].start = IOP331_PCI_LOWER_MEM_PA;
83 res[1].end = IOP331_PCI_UPPER_MEM_PA;
84 res[1].name = "IQ80332 PCI Memory Space";
85 res[1].flags = IORESOURCE_MEM;
86
87 request_resource(&ioport_resource, &res[0]);
88 request_resource(&iomem_resource, &res[1]);
89
90 sys->mem_offset = IOP331_PCI_MEM_OFFSET;
91 sys->io_offset = IOP331_PCI_IO_OFFSET;
92
93 sys->resource[0] = &res[0];
94 sys->resource[1] = &res[1];
95 sys->resource[2] = NULL;
96
97 return 1;
98}
99
100static void iq80332_preinit(void)
101{
102 iop331_init();
103}
104
105static struct hw_pci iq80332_pci __initdata = {
106 .swizzle = pci_std_swizzle,
107 .nr_controllers = 1,
108 .setup = iq80332_setup,
109 .scan = iop331_scan_bus,
110 .preinit = iq80332_preinit,
111 .map_irq = iq80332_map_irq
112};
113
114static int __init iq80332_pci_init(void)
115{
116 if (machine_is_iq80332())
117 pci_common_init(&iq80332_pci);
118 return 0;
119}
120
121subsys_initcall(iq80332_pci_init);
122
123
124
125