mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-18 09:44:18 +08:00
101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1995, 1996, 1997, 2002 by Ralf Baechle
|
|
* Copyright (C) 2001, 2002, 2003 by Liam Davies (ldavies@agile.tv)
|
|
*/
|
|
#include <linux/types.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/pci.h>
|
|
#include <asm/io.h>
|
|
#include <asm/gt64120.h>
|
|
|
|
#include <asm/mach-cobalt/cobalt.h>
|
|
|
|
/*
|
|
* Device 31 on the GT64111 is used to generate PCI special
|
|
* cycles, so we shouldn't expected to find a device there ...
|
|
*/
|
|
static inline int pci_range_ck(struct pci_bus *bus, unsigned int devfn)
|
|
{
|
|
if (bus->number == 0 && PCI_SLOT(devfn) < 31)
|
|
return 0;
|
|
|
|
return -1;
|
|
}
|
|
|
|
static int gt64111_pci_read_config(struct pci_bus *bus, unsigned int devfn,
|
|
int where, int size, u32 * val)
|
|
{
|
|
if (pci_range_ck(bus, devfn))
|
|
return PCIBIOS_DEVICE_NOT_FOUND;
|
|
|
|
switch (size) {
|
|
case 4:
|
|
PCI_CFG_SET(devfn, where);
|
|
*val = GALILEO_INL(GT_PCI0_CFGDATA_OFS);
|
|
return PCIBIOS_SUCCESSFUL;
|
|
|
|
case 2:
|
|
PCI_CFG_SET(devfn, (where & ~0x3));
|
|
*val = GALILEO_INL(GT_PCI0_CFGDATA_OFS)
|
|
>> ((where & 3) * 8);
|
|
return PCIBIOS_SUCCESSFUL;
|
|
|
|
case 1:
|
|
PCI_CFG_SET(devfn, (where & ~0x3));
|
|
*val = GALILEO_INL(GT_PCI0_CFGDATA_OFS)
|
|
>> ((where & 3) * 8);
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
return PCIBIOS_BAD_REGISTER_NUMBER;
|
|
}
|
|
|
|
static int gt64111_pci_write_config(struct pci_bus *bus, unsigned int devfn,
|
|
int where, int size, u32 val)
|
|
{
|
|
u32 tmp;
|
|
|
|
if (pci_range_ck(bus, devfn))
|
|
return PCIBIOS_DEVICE_NOT_FOUND;
|
|
|
|
switch (size) {
|
|
case 4:
|
|
PCI_CFG_SET(devfn, where);
|
|
GALILEO_OUTL(val, GT_PCI0_CFGDATA_OFS);
|
|
|
|
return PCIBIOS_SUCCESSFUL;
|
|
|
|
case 2:
|
|
PCI_CFG_SET(devfn, (where & ~0x3));
|
|
tmp = GALILEO_INL(GT_PCI0_CFGDATA_OFS);
|
|
tmp &= ~(0xffff << ((where & 0x3) * 8));
|
|
tmp |= (val << ((where & 0x3) * 8));
|
|
GALILEO_OUTL(tmp, GT_PCI0_CFGDATA_OFS);
|
|
|
|
return PCIBIOS_SUCCESSFUL;
|
|
|
|
case 1:
|
|
PCI_CFG_SET(devfn, (where & ~0x3));
|
|
tmp = GALILEO_INL(GT_PCI0_CFGDATA_OFS);
|
|
tmp &= ~(0xff << ((where & 0x3) * 8));
|
|
tmp |= (val << ((where & 0x3) * 8));
|
|
GALILEO_OUTL(tmp, GT_PCI0_CFGDATA_OFS);
|
|
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
return PCIBIOS_BAD_REGISTER_NUMBER;
|
|
}
|
|
|
|
struct pci_ops gt64111_pci_ops = {
|
|
.read = gt64111_pci_read_config,
|
|
.write = gt64111_pci_write_config,
|
|
};
|