Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

#include <linux/kernel.h>

#include <linux/pci.h>

#include <asm/pci-direct.h>

#include <asm/io.h>

#include "pci.h"

/* Direct PCI access. This is used for PCI accesses in early boot before

   the PCI subsystem works. */

#define PDprintk(x...)

u32 read_pci_config(u8 bus, u8 slot, u8 func, u8 offset)

{

        u32 v;

        outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);

        v = inl(0xcfc);

        if (v != 0xffffffff)

                PDprintk("%x reading 4 from %x: %x\n", slot, offset, v);

        return v;

}

u8 read_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset)

{

        u8 v;

        outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);

        v = inb(0xcfc + (offset&3));

        PDprintk("%x reading 1 from %x: %x\n", slot, offset, v);

        return v;

}

u16 read_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset)

{

        u16 v;

        outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);

        v = inw(0xcfc + (offset&2));

        PDprintk("%x reading 2 from %x: %x\n", slot, offset, v);

        return v;

}

void write_pci_config(u8 bus, u8 slot, u8 func, u8 offset,

                                    u32 val)

{

        PDprintk("%x writing to %x: %x\n", slot, offset, val);

        outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);

        outl(val, 0xcfc);

}

void write_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset, u8 val)

{

        PDprintk("%x writing to %x: %x\n", slot, offset, val);

        outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);

        outb(val, 0xcfc);

}

int early_pci_allowed(void)

{

        return (pci_probe & (PCI_PROBE_CONF1|PCI_PROBE_NOEARLY)) ==

                        PCI_PROBE_CONF1;

}