Viewing file:  gemini_pci.c (2.94 KB) -rw-r--r--
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/*
* BK Id: SCCS/s.gemini_pci.c 1.6 10/11/01 08:51:46 trini
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <asm/machdep.h>
#include <asm/gemini.h>
#include <asm/byteorder.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/pci-bridge.h>
#include "pci.h"
#define pci_config_addr(bus,dev,offset) \
(0x80000000 | (bus<<16) | (dev<<8) | offset)
int
gemini_pcibios_read_config_byte(struct pci_dev *dev, int offset, u8 *val)
{
unsigned long reg;
reg = grackle_read(pci_config_addr(dev->bus->number, dev->devfn,
(offset & ~(0x3))));
*val = ((reg >> ((offset & 0x3) << 3)) & 0xff);
return PCIBIOS_SUCCESSFUL;
}
int
gemini_pcibios_read_config_word(struct pci_dev *dev, int offset, u16 *val)
{
unsigned long reg;
reg = grackle_read(pci_config_addr(dev->bus->number, dev->devfn,
(offset & ~(0x3))));
*val = ((reg >> ((offset & 0x3) << 3)) & 0xffff);
return PCIBIOS_SUCCESSFUL;
}
int
gemini_pcibios_read_config_dword(struct pci_dev *dev, int offset, u32 *val)
{
*val = grackle_read(pci_config_addr(dev->bus->number, dev->devfn,
(offset & ~(0x3))));
return PCIBIOS_SUCCESSFUL;
}
int
gemini_pcibios_write_config_byte(struct pci_dev *dev, int offset, u8 val)
{
unsigned long reg;
int shifts = offset & 0x3;
unsigned int addr = pci_config_addr(dev->bus->number, dev->devfn,
(offset & ~(0x3)));
reg = grackle_read(addr);
reg = (reg & ~(0xff << (shifts << 3))) | (val << (shifts << 3));
grackle_write(addr, reg );
return PCIBIOS_SUCCESSFUL;
}
int
gemini_pcibios_write_config_word(struct pci_dev *dev, int offset, u16 val)
{
unsigned long reg;
int shifts = offset & 0x3;
unsigned int addr = pci_config_addr(dev->bus->number, dev->devfn,
(offset & ~(0x3)));
reg = grackle_read(addr);
reg = (reg & ~(0xffff << (shifts << 3))) | (val << (shifts << 3));
grackle_write(addr, reg );
return PCIBIOS_SUCCESSFUL;
}
int
gemini_pcibios_write_config_dword(struct pci_dev *dev, int offset, u32 val)
{
grackle_write(pci_config_addr(dev->bus->number, dev->devfn,
(offset & ~(0x3))), val);
return PCIBIOS_SUCCESSFUL;
}
static struct pci_ops gemini_pci_ops =
{
gemini_pcibios_read_config_byte,
gemini_pcibios_read_config_word,
gemini_pcibios_read_config_dword,
gemini_pcibios_write_config_byte,
gemini_pcibios_write_config_word,
gemini_pcibios_write_config_dword
};
void __init gemini_pcibios_fixup(void)
{
int i;
struct pci_dev *dev;
pci_for_each_dev(dev) {
for(i = 0; i < 6; i++) {
if (dev->resource[i].flags & IORESOURCE_IO) {
dev->resource[i].start |= (0xfe << 24);
dev->resource[i].end |= (0xfe << 24);
}
}
}
}
/* The "bootloader" for Synergy boards does none of this for us, so we need to
lay it all out ourselves... --Dan */
void __init gemini_find_bridges(void)
{
struct pci_controller* hose;
ppc_md.pcibios_fixup = gemini_pcibios_fixup;
hose = pcibios_alloc_controller();
if (!hose)
return;
hose->ops = &gemini_pci_ops;
}
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