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/*
* This file is part of the LinuxBIOS project.
*
* Copyright (C) 2007 Rudolf Marek <r.marek@assembler.cz>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License v2 as published by
* the Free Software Foundation.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pciexp.h>
#include <device/pci_ops.h>
#include <device/pci_ids.h>
void peg_init(struct device *dev)
{
u8 reg;
printk_debug("Configuring PCIe PEG\n");
dump_south(dev);
/* Disable link. */
reg = pci_read_config8(dev, 0x50);
pci_write_config8(dev, 0x50, reg | 0x10);
/* Award has 0xb, VIA recomends 0x4. */
pci_write_config8(dev, 0xe1, 0xb);
/*
* pci_write_config8(dev, 0xe2, 0x0);
* pci_write_config8(dev, 0xe3, 0x92);
*/
/* Disable scrambling bit 6 to 1. */
pci_write_config8(dev, 0xc0, 0x43);
/* Set replay timer limit. */
pci_write_config8(dev, 0xb1, 0xf0);
/* Bit0 = 1 SDP (Start DLLP) always at Lane0. */
reg = pci_read_config8(dev, 0xb8);
pci_write_config8(dev, 0xb8, reg | 0x1);
/*
* Downstream wait and Upstream Checking Malformed TLP through
* "Byte Enable Rule" And "Over 4K Boundary Rule".
*/
reg = pci_read_config8(dev, 0xa4);
pci_write_config8(dev, 0xa4, reg | 0x30);
/* Enable link. */
reg = pci_read_config8(dev, 0x50);
pci_write_config8(dev, 0x50, reg & ~0x10);
/* Retrain link. */
reg = pci_read_config8(dev, 0x50);
pci_write_config8(dev, 0x50, reg | 0x20);
reg = pci_read_config8(dev, 0x3e);
reg |= 0x40; /* Bus reset. */
pci_write_config8(dev, 0x3e, reg);
reg = pci_read_config8(dev, 0x3e);
reg &= ~0x40; /* Clear reset. */
pci_write_config8(dev, 0x3e, reg);
dump_south(dev);
}
void pcie_init(struct device *dev)
{
u8 reg;
printk_debug("Configuring PCIe PEXs\n");
dump_south(dev);
/* Disable link. */
reg = pci_read_config8(dev, 0x50);
pci_write_config8(dev, 0x50, reg | 0x10);
/* Award has 0xb, VIA recommends 0x4. */
pci_write_config8(dev, 0xe1, 0xb);
/* Set replay timer limit. */
pci_write_config8(dev, 0xb1, 0xf0);
/* Enable link. */
reg = pci_read_config8(dev, 0x50);
pci_write_config8(dev, 0x50, reg & ~0x10);
/* Retrain. */
reg = pci_read_config8(dev, 0x50);
pci_write_config8(dev, 0x50, reg | 0x20);
reg = pci_read_config8(dev, 0x3e);
reg |= 0x40; /* Bus reset. */
pci_write_config8(dev, 0x3e, reg);
reg = pci_read_config8(dev, 0x3e);
reg &= ~0x40; /* Clear reset. */
pci_write_config8(dev, 0x3e, reg);
dump_south(dev);
}
static struct device_operations peg_ops = {
.read_resources = pci_bus_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_bus_enable_resources,
.enable = peg_init,
.scan_bus = pciexp_scan_bridge,
.reset_bus = pci_bus_reset,
.ops_pci = 0,
};
static struct device_operations pcie_ops = {
.read_resources = pci_bus_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_bus_enable_resources,
.enable = pcie_init,
.scan_bus = pciexp_scan_bridge,
.reset_bus = pci_bus_reset,
.ops_pci = 0,
};
static const struct pci_driver northbridge_driver __pci_driver = {
.ops = &peg_ops,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_K8T890CE_PEG,
};
static const struct pci_driver pcie_drvd3f0 __pci_driver = {
.ops = &pcie_ops,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_K8T890CE_PEX0,
};
static const struct pci_driver pcie_drvd3f1 __pci_driver = {
.ops = &pcie_ops,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_K8T890CE_PEX1,
};
static const struct pci_driver pcie_drvd3f2 __pci_driver = {
.ops = &pcie_ops,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_K8T890CE_PEX2,
};
static const struct pci_driver pcie_drvd3f3 __pci_driver = {
.ops = &pcie_ops,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_K8T890CE_PEX3,
};
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