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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007 Rudolf Marek <r.marek@assembler.cz>
* Copyright (C) 2011 Alexandru Gagniuc <mr.nuke.me@gmail.com>
*
* 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.
*
* 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.
*/
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <device/pci_ids.h>
#include <console/console.h>
#include <cbmem.h>
#include <arch/io.h>
#include "k8x8xx.h"
/* this may be later merged */
/* This fine tunes the HT link settings, which were loaded by ROM strap. */
static void host_ctrl_enable_k8t8xx(struct device *dev)
{
/*
* Bit 4 is reserved but set by AW. Set PCI to HT outstanding
* requests to 3.
*/
pci_write_config8(dev, 0xa0, 0x13);
/*
* NVRAM I/O base at K8T890_NVRAM_IO_BASE
* Some bits are set and reserved.
*/
pci_write_config8(dev, 0xa2, (K8T890_NVRAM_IO_BASE >> 8));
/* enable NB NVRAM and enable non-posted PCI writes. */
pci_write_config8(dev, 0xa1, 0x8f);
/* Arbitration control, some bits are reserved. */
pci_write_config8(dev, 0xa5, 0x3c);
/* Arbitration control 2 */
pci_write_config8(dev, 0xa6, 0x80);
/* this will be possibly removed, when I figure out
* if the ROM SIP is good, second reason is that the
* unknown bits are AGP related, which are dummy on K8T890
*/
writeback(dev, 0xa0, 0x13); /* Bit4 is reserved! */
writeback(dev, 0xa1, 0x8e); /* Some bits are reserved. */
writeback(dev, 0xa2, 0x0e); /* I/O NVRAM base 0xe00-0xeff disabled. */
writeback(dev, 0xa3, 0x31);
writeback(dev, 0xa4, 0x30);
writeback(dev, 0xa5, 0x3c); /* Some bits reserved. */
writeback(dev, 0xa6, 0x80); /* Some bits reserved. */
writeback(dev, 0xa7, 0x86); /* Some bits reserved. */
writeback(dev, 0xa8, 0x7f); /* Some bits reserved. */
writeback(dev, 0xa9, 0xcf); /* Some bits reserved. */
writeback(dev, 0xaa, 0x44);
writeback(dev, 0xab, 0x22);
writeback(dev, 0xac, 0x35); /* Maybe bit0 is read-only? */
writeback(dev, 0xae, 0x22);
writeback(dev, 0xaf, 0x40);
/* b0 is missing. */
writeback(dev, 0xb1, 0x13);
writeback(dev, 0xb4, 0x02); /* Some bits are reserved. */
writeback(dev, 0xc0, 0x20);
writeback(dev, 0xc1, 0xaa);
writeback(dev, 0xc2, 0xaa);
writeback(dev, 0xc3, 0x02);
writeback(dev, 0xc4, 0x50);
writeback(dev, 0xc5, 0x50);
printk(BIOS_DEBUG, " VIA_X_2 device dump:\n");
dump_south(dev);
}
/* This fine tunes the HT link settings, which were loaded by ROM strap. */
static void host_ctrl_enable_k8m8xx(struct device *dev) {
/*
* Set PCI to HT outstanding requests to 03.
* Bit 4 32 AGP ADS Read Outstanding Request Number
*/
pci_write_config8(dev, 0xa0, 0x13);
/*
* NVRAM I/O base at K8T890_NVRAM_IO_BASE
*/
pci_write_config8(dev, 0xa2, (K8T890_NVRAM_IO_BASE >> 8));
/* Enable NVRAM and enable non-posted PCI writes. */
pci_write_config8(dev, 0xa1, 0x8f);
/* Arbitration control */
pci_write_config8(dev, 0xa5, 0x3c);
/* Arbitration control 2, Enable C2NOW delay to PSTATECTL */
pci_write_config8(dev, 0xa6, 0x83);
}
#if IS_ENABLED(CONFIG_LATE_CBMEM_INIT)
void backup_top_of_ram(uint64_t ramtop)
{
outl((u32) ramtop, K8T890_NVRAM_IO_BASE+K8T890_NVRAM_TOP_OF_RAM);
}
#endif
static struct pci_operations lops_pci = {
.set_subsystem = pci_dev_set_subsystem,
};
static const struct device_operations host_ctrl_ops_t = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.enable = host_ctrl_enable_k8t8xx,
.ops_pci = &lops_pci,
};
static const struct device_operations host_ctrl_ops_m = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.enable = host_ctrl_enable_k8m8xx,
.ops_pci = &lops_pci,
};
static const struct pci_driver northbridge_driver_t800 __pci_driver = {
.ops = &host_ctrl_ops_t,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_K8T800_HOST_CTR,
};
static const struct pci_driver northbridge_driver_m800 __pci_driver = {
.ops = &host_ctrl_ops_m,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_K8M800_HOST_CTR,
};
static const struct pci_driver northbridge_driver_t890 __pci_driver = {
.ops = &host_ctrl_ops_t,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_K8T890CE_2,
};
static const struct pci_driver northbridge_driver_m890 __pci_driver = {
.ops = &host_ctrl_ops_m,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_K8M890CE_2,
};
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