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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.
*
* 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 <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include "mcp55.h"
static u32 final_reg;
static struct device *find_lpc_dev(struct device *dev, unsigned devfn)
{
struct device *lpc_dev;
lpc_dev = pcidev_path_behind(dev->bus, devfn);
if (!lpc_dev)
return lpc_dev;
if ((lpc_dev->vendor != PCI_VENDOR_ID_NVIDIA) || (
(lpc_dev->device < PCI_DEVICE_ID_NVIDIA_MCP55_LPC) ||
(lpc_dev->device > PCI_DEVICE_ID_NVIDIA_MCP55_PRO)))
{
u32 id;
id = pci_read_config32(lpc_dev, PCI_VENDOR_ID);
if ((id < (PCI_VENDOR_ID_NVIDIA
| (PCI_DEVICE_ID_NVIDIA_MCP55_LPC << 16))) ||
(id > (PCI_VENDOR_ID_NVIDIA
| (PCI_DEVICE_ID_NVIDIA_MCP55_PRO << 16))))
{
lpc_dev = 0;
}
}
return lpc_dev;
}
void mcp55_enable(struct device *dev)
{
struct device *lpc_dev = NULL, *sm_dev = NULL;
unsigned index = 0, index2 = 0;
u32 reg_old, reg;
u8 byte;
unsigned deviceid, vendorid, devfn;
int i;
if (dev->device == 0x0000) {
vendorid = pci_read_config32(dev, PCI_VENDOR_ID);
deviceid = (vendorid >> 16) & 0xffff;
} else {
deviceid = dev->device;
}
devfn = (dev->path.pci.devfn) & ~7;
switch (deviceid) {
case PCI_DEVICE_ID_NVIDIA_MCP55_HT:
return;
case PCI_DEVICE_ID_NVIDIA_MCP55_SM2: //?
index = 16;
break;
case PCI_DEVICE_ID_NVIDIA_MCP55_USB:
devfn -= (1 << 3);
index = 8;
break;
case PCI_DEVICE_ID_NVIDIA_MCP55_USB2:
devfn -= (1 << 3);
index = 20;
break;
case PCI_DEVICE_ID_NVIDIA_MCP55_NIC: // two
case PCI_DEVICE_ID_NVIDIA_MCP55_NIC_BRIDGE: // two
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_NVIDIA_MCP55_AZA:
devfn -= (5 << 3);
index = 11;
break;
case PCI_DEVICE_ID_NVIDIA_MCP55_IDE:
devfn -= (3 << 3);
index = 14;
break;
case PCI_DEVICE_ID_NVIDIA_MCP55_SATA0: // three
case PCI_DEVICE_ID_NVIDIA_MCP55_SATA1: // three
devfn -= (4 << 3);
index = 22;
i = (dev->path.pci.devfn) & 7;
if (i > 0)
index -= (i + 3);
break;
case PCI_DEVICE_ID_NVIDIA_MCP55_PCI:
devfn -= (5 << 3);
index = 15;
break;
case PCI_DEVICE_ID_NVIDIA_MCP55_PCIE_A:
devfn -= (0x9 << 3); // to LPC
index2 = 9;
break;
case PCI_DEVICE_ID_NVIDIA_MCP55_PCIE_B_C: // two
devfn -= (0xa << 3); // to LPC
index2 = 8;
for (i = 0; i < 2; i++) {
lpc_dev = find_lpc_dev(dev, devfn - (i << 3));
if (!lpc_dev)
continue;
index2 -= i;
devfn -= (i << 3);
break;
}
break;
case PCI_DEVICE_ID_NVIDIA_MCP55_PCIE_D:
devfn -= (0xc << 3); // to LPC
index2 = 6;
break;
case PCI_DEVICE_ID_NVIDIA_MCP55_PCIE_E:
devfn -= (0xd << 3); // to LPC
index2 = 5;
break;
case PCI_DEVICE_ID_NVIDIA_MCP55_PCIE_F:
devfn -= (0xe << 3); // to LPC
index2 = 4;
break;
default:
index = 0;
}
if (!lpc_dev)
lpc_dev = find_lpc_dev(dev, devfn);
if (!lpc_dev)
return;
if (index2 != 0) {
sm_dev = pcidev_path_behind(dev->bus, devfn + 1);
if (!sm_dev)
return;
if (sm_dev) {
reg_old = reg = pci_read_config32(sm_dev, 0xe4);
if (!dev->enabled)
reg |= (1<<index2); /* Disable it. */
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 BAR and enable write. */
pci_write_config8(dev, 0xdd, byte);
return;
}
if (index == 16) {
sm_dev = pcidev_path_behind(dev->bus, devfn + 1);
if (!sm_dev)
return;
final_reg = pci_read_config32(sm_dev, 0xe8);
final_reg &= ~((1 << 16) | (1 << 8) | (1 << 20) | (1 << 14)
| (1 << 22) | (1 << 18) | (1 << 17) | (1 << 15)
| (1 << 11) | (1 << 10) | (1 << 9));
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.
*/
}
/* NIC1 is the final, we need update final reg to 0xe8. */
if (index == 9) {
sm_dev = pcidev_path_behind(dev->bus, 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);
}
}
static void mcp55_set_subsystem(struct device *dev, unsigned vendor,
unsigned device)
{
pci_write_config32(dev, 0x40,
((device & 0xffff) << 16) | (vendor & 0xffff));
}
struct pci_operations mcp55_pci_ops = {
.set_subsystem = mcp55_set_subsystem,
};
struct chip_operations southbridge_nvidia_mcp55_ops = {
CHIP_NAME("NVIDIA MCP55 Southbridge")
.enable_dev = mcp55_enable,
};
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