1 #include <linux/kernel.h>
2 #include <linux/init.h>
4 #include <linux/slab.h>
6 #include <asm/machdep.h>
7 #include <platforms/gemini.h>
8 #include <asm/byteorder.h>
10 #include <asm/uaccess.h>
11 #include <asm/pci-bridge.h>
13 #define pci_config_addr(bus,dev,offset) \
14 (0x80000000 | (bus<<16) | (dev<<8) | offset)
18 gemini_pcibios_read_config_byte(struct pci_dev *dev, int offset, u8 *val)
21 reg = grackle_read(pci_config_addr(dev->bus->number, dev->devfn,
23 *val = ((reg >> ((offset & 0x3) << 3)) & 0xff);
24 return PCIBIOS_SUCCESSFUL;
28 gemini_pcibios_read_config_word(struct pci_dev *dev, int offset, u16 *val)
31 reg = grackle_read(pci_config_addr(dev->bus->number, dev->devfn,
33 *val = ((reg >> ((offset & 0x3) << 3)) & 0xffff);
34 return PCIBIOS_SUCCESSFUL;
38 gemini_pcibios_read_config_dword(struct pci_dev *dev, int offset, u32 *val)
40 *val = grackle_read(pci_config_addr(dev->bus->number, dev->devfn,
42 return PCIBIOS_SUCCESSFUL;
46 gemini_pcibios_write_config_byte(struct pci_dev *dev, int offset, u8 val)
49 int shifts = offset & 0x3;
50 unsigned int addr = pci_config_addr(dev->bus->number, dev->devfn,
53 reg = grackle_read(addr);
54 reg = (reg & ~(0xff << (shifts << 3))) | (val << (shifts << 3));
55 grackle_write(addr, reg );
56 return PCIBIOS_SUCCESSFUL;
60 gemini_pcibios_write_config_word(struct pci_dev *dev, int offset, u16 val)
63 int shifts = offset & 0x3;
64 unsigned int addr = pci_config_addr(dev->bus->number, dev->devfn,
67 reg = grackle_read(addr);
68 reg = (reg & ~(0xffff << (shifts << 3))) | (val << (shifts << 3));
69 grackle_write(addr, reg );
70 return PCIBIOS_SUCCESSFUL;
74 gemini_pcibios_write_config_dword(struct pci_dev *dev, int offset, u32 val)
76 grackle_write(pci_config_addr(dev->bus->number, dev->devfn,
77 (offset & ~(0x3))), val);
78 return PCIBIOS_SUCCESSFUL;
81 static struct pci_ops gemini_pci_ops =
83 gemini_pcibios_read_config_byte,
84 gemini_pcibios_read_config_word,
85 gemini_pcibios_read_config_dword,
86 gemini_pcibios_write_config_byte,
87 gemini_pcibios_write_config_word,
88 gemini_pcibios_write_config_dword
91 void __init gemini_pcibios_fixup(void)
96 pci_for_each_dev(dev) {
97 for(i = 0; i < 6; i++) {
98 if (dev->resource[i].flags & IORESOURCE_IO) {
99 dev->resource[i].start |= (0xfe << 24);
100 dev->resource[i].end |= (0xfe << 24);
107 /* The "bootloader" for Synergy boards does none of this for us, so we need to
108 lay it all out ourselves... --Dan */
109 void __init gemini_find_bridges(void)
111 struct pci_controller* hose;
113 ppc_md.pcibios_fixup = gemini_pcibios_fixup;
115 hose = pcibios_alloc_controller();
118 hose->ops = &gemini_pci_ops;