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-rw-r--r--arch/mips/pci/pci-ddb5476.c93
1 files changed, 93 insertions, 0 deletions
diff --git a/arch/mips/pci/pci-ddb5476.c b/arch/mips/pci/pci-ddb5476.c
new file mode 100644
index 000000000000..90dd49509800
--- /dev/null
+++ b/arch/mips/pci/pci-ddb5476.c
@@ -0,0 +1,93 @@
1#include <linux/kernel.h>
2#include <linux/init.h>
3#include <linux/types.h>
4#include <linux/pci.h>
5
6#include <asm/debug.h>
7
8#include <asm/ddb5xxx/ddb5xxx.h>
9
10static struct resource extpci_io_resource = {
11 "pci IO space",
12 0x1000, /* leave some room for ISA bus */
13 DDB_PCI_IO_SIZE - 1,
14 IORESOURCE_IO
15};
16
17static struct resource extpci_mem_resource = {
18 "pci memory space",
19 DDB_PCI_MEM_BASE + 0x00100000, /* leave 1 MB for RTC */
20 DDB_PCI_MEM_BASE + DDB_PCI_MEM_SIZE - 1,
21 IORESOURCE_MEM
22};
23
24extern struct pci_ops ddb5476_ext_pci_ops;
25
26struct pci_controller ddb5476_controller = {
27 .pci_ops = &ddb5476_ext_pci_ops,
28 .io_resource = &extpci_io_resource,
29 .mem_resource = &extpci_mem_resource
30};
31
32
33/*
34 * we fix up irqs based on the slot number.
35 * The first entry is at AD:11.
36 *
37 * This does not work for devices on sub-buses yet.
38 */
39
40/*
41 * temporary
42 */
43
44#define PCI_EXT_INTA 8
45#define PCI_EXT_INTB 9
46#define PCI_EXT_INTC 10
47#define PCI_EXT_INTD 11
48#define PCI_EXT_INTE 12
49
50/*
51 * based on ddb5477 manual page 11
52 */
53#define MAX_SLOT_NUM 21
54static unsigned char irq_map[MAX_SLOT_NUM] = {
55 [ 2] = 9, /* AD:13 USB */
56 [ 3] = 10, /* AD:14 PMU */
57 [ 5] = 0, /* AD:16 P2P bridge */
58 [ 6] = nile4_to_irq(PCI_EXT_INTB), /* AD:17 */
59 [ 7] = nile4_to_irq(PCI_EXT_INTC), /* AD:18 */
60 [ 8] = nile4_to_irq(PCI_EXT_INTD), /* AD:19 */
61 [ 9] = nile4_to_irq(PCI_EXT_INTA), /* AD:20 */
62 [13] = 14, /* AD:24 HD controller, M5229 */
63};
64
65int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
66{
67 return irq_map[slot];
68}
69
70/* Do platform specific device initialization at pci_enable_device() time */
71int pcibios_plat_dev_init(struct pci_dev *dev)
72{
73 return 0;
74}
75
76void __init ddb_pci_reset_bus(void)
77{
78 u32 temp;
79
80 /*
81 * I am not sure about the "official" procedure, the following
82 * steps work as far as I know:
83 * We first set PCI cold reset bit (bit 31) in PCICTRL-H.
84 * Then we clear the PCI warm reset bit (bit 30) to 0 in PCICTRL-H.
85 * The same is true for both PCI channels.
86 */
87 temp = ddb_in32(DDB_PCICTRL + 4);
88 temp |= 0x80000000;
89 ddb_out32(DDB_PCICTRL + 4, temp);
90 temp &= ~0xc0000000;
91 ddb_out32(DDB_PCICTRL + 4, temp);
92
93}