diff options
Diffstat (limited to 'arch/arm/mach-iop32x/iq31244-pci.c')
-rw-r--r-- | arch/arm/mach-iop32x/iq31244-pci.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/arch/arm/mach-iop32x/iq31244-pci.c b/arch/arm/mach-iop32x/iq31244-pci.c new file mode 100644 index 000000000000..e447c8103ecd --- /dev/null +++ b/arch/arm/mach-iop32x/iq31244-pci.c | |||
@@ -0,0 +1,129 @@ | |||
1 | /* | ||
2 | * arch/arm/mach-iop32x/iq31244-pci.c | ||
3 | * | ||
4 | * PCI support for the Intel IQ31244 reference board | ||
5 | * | ||
6 | * Author: Rory Bolt <rorybolt@pacbell.net> | ||
7 | * Copyright (C) 2002 Rory Bolt | ||
8 | * Copyright (C) 2004 Intel Corp. | ||
9 | * | ||
10 | * This program is free software; you can redistribute it and/or modify | ||
11 | * it under the terms of the GNU General Public License version 2 as | ||
12 | * published by the Free Software Foundation. | ||
13 | */ | ||
14 | #include <linux/kernel.h> | ||
15 | #include <linux/pci.h> | ||
16 | #include <linux/init.h> | ||
17 | #include <linux/string.h> | ||
18 | #include <linux/slab.h> | ||
19 | |||
20 | #include <asm/hardware.h> | ||
21 | #include <asm/irq.h> | ||
22 | #include <asm/mach/pci.h> | ||
23 | #include <asm/mach-types.h> | ||
24 | |||
25 | /* | ||
26 | * The following macro is used to lookup irqs in a standard table | ||
27 | * format for those systems that do not already have PCI | ||
28 | * interrupts properly routed. We assume 1 <= pin <= 4 | ||
29 | */ | ||
30 | #define PCI_IRQ_TABLE_LOOKUP(minid,maxid) \ | ||
31 | ({ int _ctl_ = -1; \ | ||
32 | unsigned int _idsel = idsel - minid; \ | ||
33 | if (_idsel <= maxid) \ | ||
34 | _ctl_ = pci_irq_table[_idsel][pin-1]; \ | ||
35 | _ctl_; }) | ||
36 | |||
37 | #define INTA IRQ_IQ31244_INTA | ||
38 | #define INTB IRQ_IQ31244_INTB | ||
39 | #define INTC IRQ_IQ31244_INTC | ||
40 | #define INTD IRQ_IQ31244_INTD | ||
41 | |||
42 | #define INTE IRQ_IQ31244_I82546 | ||
43 | |||
44 | static inline int __init | ||
45 | iq31244_map_irq(struct pci_dev *dev, u8 idsel, u8 pin) | ||
46 | { | ||
47 | static int pci_irq_table[][4] = { | ||
48 | /* | ||
49 | * PCI IDSEL/INTPIN->INTLINE | ||
50 | * A B C D | ||
51 | */ | ||
52 | #ifdef CONFIG_ARCH_EP80219 | ||
53 | {INTB, INTB, INTB, INTB}, /* CFlash */ | ||
54 | {INTE, INTE, INTE, INTE}, /* 82551 Pro 100 */ | ||
55 | {INTD, INTD, INTD, INTD}, /* PCI-X Slot */ | ||
56 | {INTC, INTC, INTC, INTC}, /* SATA */ | ||
57 | #else | ||
58 | {INTB, INTB, INTB, INTB}, /* CFlash */ | ||
59 | {INTC, INTC, INTC, INTC}, /* SATA */ | ||
60 | {INTD, INTD, INTD, INTD}, /* PCI-X Slot */ | ||
61 | {INTE, INTE, INTE, INTE}, /* 82546 GigE */ | ||
62 | #endif // CONFIG_ARCH_EP80219 | ||
63 | }; | ||
64 | |||
65 | BUG_ON(pin < 1 || pin > 4); | ||
66 | |||
67 | return PCI_IRQ_TABLE_LOOKUP(0, 7); | ||
68 | } | ||
69 | |||
70 | static int iq31244_setup(int nr, struct pci_sys_data *sys) | ||
71 | { | ||
72 | struct resource *res; | ||
73 | |||
74 | if(nr != 0) | ||
75 | return 0; | ||
76 | |||
77 | res = kzalloc(sizeof(struct resource) * 2, GFP_KERNEL); | ||
78 | if (!res) | ||
79 | panic("PCI: unable to alloc resources"); | ||
80 | |||
81 | res[0].start = IOP321_PCI_LOWER_IO_VA; | ||
82 | res[0].end = IOP321_PCI_UPPER_IO_VA; | ||
83 | res[0].name = "IQ31244 PCI I/O Space"; | ||
84 | res[0].flags = IORESOURCE_IO; | ||
85 | |||
86 | res[1].start = IOP321_PCI_LOWER_MEM_PA; | ||
87 | res[1].end = IOP321_PCI_UPPER_MEM_PA; | ||
88 | res[1].name = "IQ31244 PCI Memory Space"; | ||
89 | res[1].flags = IORESOURCE_MEM; | ||
90 | |||
91 | request_resource(&ioport_resource, &res[0]); | ||
92 | request_resource(&iomem_resource, &res[1]); | ||
93 | |||
94 | sys->mem_offset = IOP321_PCI_MEM_OFFSET; | ||
95 | sys->io_offset = IOP321_PCI_IO_OFFSET; | ||
96 | |||
97 | sys->resource[0] = &res[0]; | ||
98 | sys->resource[1] = &res[1]; | ||
99 | sys->resource[2] = NULL; | ||
100 | |||
101 | return 1; | ||
102 | } | ||
103 | |||
104 | static void iq31244_preinit(void) | ||
105 | { | ||
106 | iop321_init(); | ||
107 | } | ||
108 | |||
109 | static struct hw_pci iq31244_pci __initdata = { | ||
110 | .swizzle = pci_std_swizzle, | ||
111 | .nr_controllers = 1, | ||
112 | .setup = iq31244_setup, | ||
113 | .scan = iop321_scan_bus, | ||
114 | .preinit = iq31244_preinit, | ||
115 | .map_irq = iq31244_map_irq | ||
116 | }; | ||
117 | |||
118 | static int __init iq31244_pci_init(void) | ||
119 | { | ||
120 | if (machine_is_iq31244()) | ||
121 | pci_common_init(&iq31244_pci); | ||
122 | return 0; | ||
123 | } | ||
124 | |||
125 | subsys_initcall(iq31244_pci_init); | ||
126 | |||
127 | |||
128 | |||
129 | |||