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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2004 Tyan Computer
* Written by Yinghai Lu <yhlu@tyan.com> for Tyan Computer.
* Copyright (C) 2006,2007 AMD
* Written by Yinghai Lu <yinghai.lu@amd.com> for AMD.
* Copyright (C) 2007 Silicon Integrated Systems Corp. (SiS)
* Written by Morgan Tsai <my_tsai@sis.com> for SiS.
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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 <console/console.h>
#include <arch/io.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include "sis966.h"
static uint32_t final_reg;
static device_t find_lpc_dev( device_t dev, unsigned devfn)
{
device_t lpc_dev;
lpc_dev = dev_find_slot(dev->bus->secondary, devfn);
if ( !lpc_dev ) return lpc_dev;
if ((lpc_dev->vendor != PCI_VENDOR_ID_SIS) || (
(lpc_dev->device != PCI_DEVICE_ID_SIS_SIS966_LPC)
) ) {
uint32_t id;
id = pci_read_config32(lpc_dev, PCI_VENDOR_ID);
if ( (id < (PCI_VENDOR_ID_SIS | (PCI_DEVICE_ID_SIS_SIS966_LPC << 16)))
) {
lpc_dev = 0;
}
}
return lpc_dev;
}
void sis966_enable(device_t dev)
{
device_t lpc_dev = 0;
device_t sm_dev = 0;
uint16_t index = 0;
uint16_t index2 = 0;
uint32_t reg_old, reg;
uint8_t byte;
uint16_t deviceid;
uint16_t vendorid;
uint16_t devfn;
struct southbridge_sis_sis966_config *conf;
conf = dev->chip_info;
int i;
if (dev->device == 0x0000) {
reg = pci_read_config32(dev, PCI_VENDOR_ID);
deviceid = (reg >> 16) & 0xffff;
vendorid = reg & 0xffff;
} else {
// vendorid = dev->vendor;
deviceid = dev->device;
}
devfn = (dev->path.pci.devfn) & ~7;
switch(deviceid) {
case PCI_DEVICE_ID_SIS_SIS966_USB:
devfn -= (1<<3);
index = 8;
break;
case PCI_DEVICE_ID_SIS_SIS966_USB2:
devfn -= (1<<3);
index = 20;
break;
case PCI_DEVICE_ID_SIS_SIS966_NIC:
devfn -= (7<<3);
index = 10;
for (i=0;i<2;i++) {
lpc_dev = find_lpc_dev(dev, devfn - (i<<3));
if (!lpc_dev) continue;
index -= i;
devfn -= (i<<3);
break;
}
break;
case PCI_DEVICE_ID_SIS_SIS966_HD_AUDIO:
devfn -= (5<<3);
index = 11;
break;
case PCI_DEVICE_ID_SIS_SIS966_IDE:
devfn -= (3<<3);
index = 14;
break;
case PCI_DEVICE_ID_SIS_SIS966_SATA:
devfn -= (4<<3);
index = 22;
i = (dev->path.pci.devfn) & 7;
if (i>0) {
index -= (i+3);
}
break;
case PCI_DEVICE_ID_SIS_SIS966_PCIE:
devfn -= (0x9<<3); // to LPC
index2 = 9;
break;
default:
index = 0;
}
if (!lpc_dev)
lpc_dev = find_lpc_dev(dev, devfn);
if ( !lpc_dev ) return;
if (index2!=0) {
sm_dev = dev_find_slot(dev->bus->secondary, devfn + 1);
if (!sm_dev) return;
if ( sm_dev ) {
reg_old = reg = pci_read_config32(sm_dev, 0xe4);
if (!dev->enabled) { //disable it
reg |= (1<<index2);
}
if (reg != reg_old) {
pci_write_config32(sm_dev, 0xe4, reg);
}
}
index2 = 0;
return;
}
if ( index == 0) { // for LPC
// expose ioapic base
byte = pci_read_config8(lpc_dev, 0x74);
byte |= ((1<<1)); // expose the BAR
pci_write_config8(dev, 0x74, byte);
// expose trap base
byte = pci_read_config8(lpc_dev, 0xdd);
byte |= ((1<<0)|(1<<3)); // expose the BAR and enable write
pci_write_config8(dev, 0xdd, byte);
return;
}
if ( index == 16) {
sm_dev = dev_find_slot(dev->bus->secondary, devfn + 1);
if (!sm_dev) return;
final_reg = pci_read_config32(sm_dev, 0xe8);
final_reg &= ~0x0057cf00;
pci_write_config32(sm_dev, 0xe8, final_reg); //enable all at first
}
if (!dev->enabled) {
final_reg |= (1 << index);// disable it
/*
* The reason for using final_reg is that if func 1 is disabled,
* then func 2 will become func 1.
* Because of this, we need loop through disabling them all at
* the same time.
*/
}
if (index == 9 ) { //NIC1 is the final, We need update final reg to 0xe8
sm_dev = dev_find_slot(dev->bus->secondary, devfn + 1);
if (!sm_dev) return;
reg_old = pci_read_config32(sm_dev, 0xe8);
if (final_reg != reg_old) {
pci_write_config32(sm_dev, 0xe8, final_reg);
}
}
}
struct chip_operations southbridge_sis_sis966_ops = {
CHIP_NAME("SiS SiS966 Southbridge")
.enable_dev = sis966_enable,
};
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