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/*
* This file is part of the coreboot project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <device/pci_ids.h>
#include "amd8111.h"
void amd8111_enable(struct device *dev)
{
struct device *lpc_dev;
struct device *bus_dev;
unsigned index;
unsigned reg_old, reg;
/* See if we are on the bus behind the amd8111 pci bridge */
bus_dev = dev->bus->dev;
if ((bus_dev->vendor == PCI_VENDOR_ID_AMD) &&
(bus_dev->device == PCI_DEVICE_ID_AMD_8111_PCI))
{
unsigned devfn;
devfn = bus_dev->path.pci.devfn + (1 << 3);
lpc_dev = pcidev_path_behind(bus_dev->bus, devfn);
index = ((dev->path.pci.devfn & ~7) >> 3) + 8;
if (dev->path.pci.devfn == 2) { /* EHCI */
index = 16;
}
} else {
unsigned devfn;
devfn = (dev->path.pci.devfn) & ~7;
lpc_dev = pcidev_path_behind(dev->bus, devfn);
index = dev->path.pci.devfn & 7;
}
if ((!lpc_dev) || (index >= 17)) {
return;
}
if ((lpc_dev->vendor != PCI_VENDOR_ID_AMD) ||
(lpc_dev->device != PCI_DEVICE_ID_AMD_8111_ISA))
{
uint32_t id;
id = pci_read_config32(lpc_dev, PCI_VENDOR_ID);
if (id != (PCI_VENDOR_ID_AMD | (PCI_DEVICE_ID_AMD_8111_ISA << 16))) {
return;
}
}
if (index < 16) {
reg = reg_old = pci_read_config16(lpc_dev, 0x48);
reg &= ~(1 << index);
if (dev->enabled) {
reg |= (1 << index);
}
if (reg != reg_old) {
pci_write_config16(lpc_dev, 0x48, reg);
}
}
else if (index == 16) {
reg = reg_old = pci_read_config8(lpc_dev, 0x47);
reg &= ~(1 << 7);
if (!dev->enabled) {
reg |= (1 << 7);
}
if (reg != reg_old) {
pci_write_config8(lpc_dev, 0x47, reg);
}
}
}
struct chip_operations southbridge_amd_amd8111_ops = {
CHIP_NAME("AMD-8111 Southbridge")
/* This only called when this device is listed in the
* static device tree.
*/
.enable_dev = amd8111_enable,
};
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