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#include <linux/types.h>
#include <linux/pci.h>
#include <linux/io.h>
#include <asm/mach-ralink/rt288x.h>
#include <asm/mach-ralink/rt288x_pci.h>
#define PCI_ACCESS_READ 0
#define PCI_ACCESS_WRITE 1
static int config_access(unsigned char access_type, struct pci_bus *bus,
unsigned int devfn, unsigned char where, u32 * data)
{
unsigned int slot = PCI_SLOT(devfn);
unsigned int address;
u8 func = PCI_FUNC(devfn);
address = (bus->number << 16) | (slot << 11) | (func << 8) | (where& 0xfc) | 0x80000000;
writel(address, RT2880_PCI_CONFIG_ADDR);
if (access_type == PCI_ACCESS_WRITE)
writel(*data, RT2880_PCI_CONFIG_DATA);
else
*data = readl(RT2880_PCI_CONFIG_DATA);
return 0;
}
int
pci_config_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 * val)
{
u32 data = 0;
if(config_access(PCI_ACCESS_READ, bus, devfn, where, &data))
return PCIBIOS_DEVICE_NOT_FOUND;
if(size == 1)
*val = (data >> ((where & 3) << 3)) & 0xff;
else if(size == 2)
*val = (data >> ((where & 3) << 3)) & 0xffff;
else
*val = data;
return PCIBIOS_SUCCESSFUL;
}
int
pci_config_write(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 val)
{
u32 data = 0;
if(size == 4)
{
data = val;
} else {
if(config_access(PCI_ACCESS_READ, bus, devfn, where, &data))
return PCIBIOS_DEVICE_NOT_FOUND;
if(size == 1)
data = (data & ~(0xff << ((where & 3) << 3))) |
(val << ((where & 3) << 3));
else if(size == 2)
data = (data & ~(0xffff << ((where & 3) << 3))) |
(val << ((where & 3) << 3));
}
if(config_access(PCI_ACCESS_WRITE, bus, devfn, where, &data))
return PCIBIOS_DEVICE_NOT_FOUND;
return PCIBIOS_SUCCESSFUL;
}
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