1 #include <linux/types.h>
3 #include <linux/kernel.h>
5 #include <asm/mips-boards/bonito64.h>
9 #define PCI_ACCESS_READ 0
10 #define PCI_ACCESS_WRITE 1
12 #define HT1LO_PCICFG_BASE 0x1a000000
13 #define HT1LO_PCICFG_BASE_TP1 0x1b000000
15 static int loongson3_pci_config_access(unsigned char access_type,
16 struct pci_bus *bus, unsigned int devfn,
19 unsigned char busnum = bus->number;
22 int device = PCI_SLOT(devfn);
23 int function = PCI_FUNC(devfn);
26 addr = (busnum << 16) | (device << 11) | (function << 8) | reg;
29 return PCIBIOS_DEVICE_NOT_FOUND;
30 addrp = (void *)(TO_UNCAC(HT1LO_PCICFG_BASE) | (addr & 0xffff));
34 addrp = (void *)(TO_UNCAC(HT1LO_PCICFG_BASE_TP1) | (addr));
38 if (access_type == PCI_ACCESS_WRITE)
42 if (*data == 0xffffffff) {
44 return PCIBIOS_DEVICE_NOT_FOUND;
47 return PCIBIOS_SUCCESSFUL;
50 static int loongson3_pci_pcibios_read(struct pci_bus *bus, unsigned int devfn,
51 int where, int size, u32 *val)
54 int ret = loongson3_pci_config_access(PCI_ACCESS_READ,
55 bus, devfn, where, &data);
57 if (ret != PCIBIOS_SUCCESSFUL)
61 *val = (data >> ((where & 3) << 3)) & 0xff;
63 *val = (data >> ((where & 3) << 3)) & 0xffff;
67 return PCIBIOS_SUCCESSFUL;
70 static int loongson3_pci_pcibios_write(struct pci_bus *bus, unsigned int devfn,
71 int where, int size, u32 val)
79 ret = loongson3_pci_config_access(PCI_ACCESS_READ,
80 bus, devfn, where, &data);
81 if (ret != PCIBIOS_SUCCESSFUL)
85 data = (data & ~(0xff << ((where & 3) << 3))) |
86 (val << ((where & 3) << 3));
88 data = (data & ~(0xffff << ((where & 3) << 3))) |
89 (val << ((where & 3) << 3));
92 ret = loongson3_pci_config_access(PCI_ACCESS_WRITE,
93 bus, devfn, where, &data);
98 struct pci_ops loongson_pci_ops = {
99 .read = loongson3_pci_pcibios_read,
100 .write = loongson3_pci_pcibios_write