Preliminary ADM5120 support, marked as broken
[oweals/openwrt.git] / target / linux / adm5120-2.6 / files / arch / mips / pci / ops-adm5120.c
1 /*
2  *      Copyright (C) ADMtek Incorporated.
3  *      Copyright (C) 2005 Jeroen Vreeken (pe1rxq@amsat.org)
4  */
5
6 #include <linux/autoconf.h>
7 #include <linux/types.h>
8 #include <linux/pci.h>
9 #include <linux/kernel.h>
10 #include <linux/init.h>
11
12 volatile u32* pci_config_address_reg = (volatile u32*)KSEG1ADDR(0x115ffff0);
13 volatile u32* pci_config_data_reg = (volatile u32*)KSEG1ADDR(0x115ffff8);
14
15 #define PCI_ENABLE 0x80000000
16                           
17 static int pci_config_read(struct pci_bus *bus, unsigned int devfn, int where,
18                            int size, uint32_t *val)
19 {
20         *pci_config_address_reg = ((bus->number & 0xff) << 0x10) |
21             ((devfn & 0xff) << 0x08) | (where & 0xfc) | PCI_ENABLE;
22         switch (size) {
23                 case 1:
24                         *val = ((*pci_config_data_reg)>>((where&3)<<3))&0xff;
25                         break;
26                 case 2:
27                         *val = ((*pci_config_data_reg)>>((where&3)<<3))&0xffff;
28                         break;
29                 default:
30                         *val = (*pci_config_data_reg);
31         }
32         return PCIBIOS_SUCCESSFUL;
33 }
34
35 static int pci_config_write(struct pci_bus *bus, unsigned int devfn, int where,
36                             int size, uint32_t val)
37 {
38         *pci_config_address_reg = ((bus->number & 0xff) << 0x10) |
39             ((devfn & 0xff) << 0x08) | (where & 0xfc) | PCI_ENABLE;
40         switch (size) {
41                 case 1:
42                         *(volatile u8 *)(((int)pci_config_data_reg) +
43                             (where & 3)) = val;
44                         break;
45                 case 2:
46                         *(volatile u16 *)(((int)pci_config_data_reg) +
47                             (where & 2)) = (val);
48                         break;
49                 default:
50                         *pci_config_data_reg = (val);
51         }
52
53         return PCIBIOS_SUCCESSFUL;
54 }
55
56 struct pci_ops adm5120_pci_ops = {
57         .read   = pci_config_read,
58         .write  = pci_config_write,
59 };