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1 | /* |
2 | * arch/arm/mach-iop3xx/iq80331-pci.c | |
3 | * | |
4 | * PCI support for the Intel IQ80331 reference board | |
5 | * | |
6 | * Author: Dave Jiang <dave.jiang@intel.com> | |
7 | * Copyright (C) 2003, 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> | |
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16 | #include <linux/string.h> |
17 | #include <linux/slab.h> | |
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18 | |
19 | #include <asm/hardware.h> | |
20 | #include <asm/irq.h> | |
21 | #include <asm/mach/pci.h> | |
22 | #include <asm/mach-types.h> | |
23 | ||
24 | /* | |
25 | * The following macro is used to lookup irqs in a standard table | |
26 | * format for those systems that do not already have PCI | |
27 | * interrupts properly routed. We assume 1 <= pin <= 4 | |
28 | */ | |
29 | #define PCI_IRQ_TABLE_LOOKUP(minid,maxid) \ | |
30 | ({ int _ctl_ = -1; \ | |
31 | unsigned int _idsel = idsel - minid; \ | |
32 | if (_idsel <= maxid) \ | |
33 | _ctl_ = pci_irq_table[_idsel][pin-1]; \ | |
34 | _ctl_; }) | |
35 | ||
36 | #define INTA IRQ_IQ80331_INTA | |
37 | #define INTB IRQ_IQ80331_INTB | |
38 | #define INTC IRQ_IQ80331_INTC | |
39 | #define INTD IRQ_IQ80331_INTD | |
40 | ||
41 | //#define INTE IRQ_IQ80331_I82544 | |
42 | ||
43 | static inline int __init | |
44 | iq80331_map_irq(struct pci_dev *dev, u8 idsel, u8 pin) | |
45 | { | |
46 | static int pci_irq_table[][4] = { | |
47 | /* | |
48 | * PCI IDSEL/INTPIN->INTLINE | |
49 | * A B C D | |
50 | */ | |
51 | {INTB, INTC, INTD, INTA}, /* PCI-X Slot */ | |
52 | {INTC, INTC, INTC, INTC}, /* GigE */ | |
53 | }; | |
54 | ||
55 | BUG_ON(pin < 1 || pin > 4); | |
56 | ||
57 | return PCI_IRQ_TABLE_LOOKUP(1, 7); | |
58 | } | |
59 | ||
60 | static int iq80331_setup(int nr, struct pci_sys_data *sys) | |
61 | { | |
62 | struct resource *res; | |
63 | ||
64 | if(nr != 0) | |
65 | return 0; | |
66 | ||
d2a02b93 | 67 | res = kzalloc(sizeof(struct resource) * 2, GFP_KERNEL); |
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68 | if (!res) |
69 | panic("PCI: unable to alloc resources"); | |
70 | ||
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71 | res[0].start = IOP331_PCI_LOWER_IO_VA; |
72 | res[0].end = IOP331_PCI_UPPER_IO_VA; | |
73 | res[0].name = "IQ80331 PCI I/O Space"; | |
74 | res[0].flags = IORESOURCE_IO; | |
75 | ||
76 | res[1].start = IOP331_PCI_LOWER_MEM_PA; | |
77 | res[1].end = IOP331_PCI_UPPER_MEM_PA; | |
78 | res[1].name = "IQ80331 PCI Memory Space"; | |
79 | res[1].flags = IORESOURCE_MEM; | |
80 | ||
81 | request_resource(&ioport_resource, &res[0]); | |
82 | request_resource(&iomem_resource, &res[1]); | |
83 | ||
84 | sys->mem_offset = IOP331_PCI_MEM_OFFSET; | |
85 | sys->io_offset = IOP331_PCI_IO_OFFSET; | |
86 | ||
87 | sys->resource[0] = &res[0]; | |
88 | sys->resource[1] = &res[1]; | |
89 | sys->resource[2] = NULL; | |
90 | ||
91 | return 1; | |
92 | } | |
93 | ||
94 | static void iq80331_preinit(void) | |
95 | { | |
96 | iop331_init(); | |
97 | } | |
98 | ||
99 | static struct hw_pci iq80331_pci __initdata = { | |
100 | .swizzle = pci_std_swizzle, | |
101 | .nr_controllers = 1, | |
102 | .setup = iq80331_setup, | |
103 | .scan = iop331_scan_bus, | |
104 | .preinit = iq80331_preinit, | |
105 | .map_irq = iq80331_map_irq | |
106 | }; | |
107 | ||
108 | static int __init iq80331_pci_init(void) | |
109 | { | |
110 | if (machine_is_iq80331()) | |
111 | pci_common_init(&iq80331_pci); | |
112 | return 0; | |
113 | } | |
114 | ||
115 | subsys_initcall(iq80331_pci_init); | |
116 | ||
117 | ||
118 | ||
119 |