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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008 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.
*/
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <device/pci_ids.h>
#include <console/console.h>
#include "vt8237r.h"
/* We support here K8M890/K8T890 and VT8237/S/A PCI1/Vlink */
static void vt8237_cfg(struct device *dev)
{
u8 regm;
device_t devfun3;
devfun3 = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_K8T800_DRAM, 0);
if (!devfun3)
devfun3 = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_K8M800_DRAM, 0);
if (!devfun3)
devfun3 = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_K8T890CE_3, 0);
if (!devfun3)
devfun3 = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_K8M890CE_3, 0);
if (!devfun3)
devfun3 = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_K8T890CF_3, 0);
if (!devfun3)
die("Unknown NB");
/* CPU to PCI Flow Control 1 & 2, just fill in recommended. */
pci_write_config8(dev, 0x70, 0xc2);
pci_write_config8(dev, 0x71, 0xc8);
/* PCI Control */
pci_write_config8(dev, 0x72, 0xee);
pci_write_config8(dev, 0x73, 0x01);
pci_write_config8(dev, 0x74, 0x3c);
pci_write_config8(dev, 0x75, 0x0f);
pci_write_config8(dev, 0x76, 0x50);
pci_write_config8(dev, 0x77, 0x48);
pci_write_config8(dev, 0x78, 0x01);
/* APIC on HT */
/* Maybe Enable LDT APIC Mode bit3 set to 1 */
pci_write_config8(dev, 0x7c, 0x77);
/* WARNING: Need to copy some registers from NB (D0F3) to SB (D11F7). */
regm = pci_read_config8(devfun3, 0x88); /* Shadow mem CTRL */
pci_write_config8(dev, 0x57, regm);
regm = pci_read_config8(devfun3, 0x80); /* Shadow page C */
pci_write_config8(dev, 0x61, regm);
regm = pci_read_config8(devfun3, 0x81); /* Shadow page D */
pci_write_config8(dev, 0x62, regm);
/* Shadow page F + memhole copy */
regm = pci_read_config8(devfun3, 0x83);
pci_write_config8(dev, 0x63, regm);
regm = pci_read_config8(devfun3, 0x82);/* Shadow page E */
pci_write_config8(dev, 0x64, regm);
regm = pci_read_config8(devfun3, 0x86); /* SMM and APIC decoding */
pci_write_config8(dev, 0xe6, regm);
}
/**
* Example of setup: Setup the V-Link for VT8237R, 8X mode.
*
* For K8T890CF VIA recommends what is in VIA column, AW is award 8X:
*
* REG DEF AW VIA-8X VIA-4X
* -----------------------------
* NB V-Link Manual Driving Control strobe 0xb5 0x46 0x46 0x88 0x88
* NB V-Link Manual Driving Control - Data 0xb6 0x46 0x46 0x88 0x88
* NB V-Link Receiving Strobe Delay 0xb7 0x02 0x02 0x61 0x01
* NB V-Link Compensation Control bit4,0 (b5,b6) 0xb4 0x10 0x10 0x11 0x11
* SB V-Link Strobe Drive Control 0xb9 0x00 0xa5 0x98 0x98
* SB V-Link Data drive Control???? 0xba 0x00 0xbb 0x77 0x77
* SB V-Link Receive Strobe Delay???? 0xbb 0x04 0x11 0x11 0x11
* SB V-Link Compensation Control bit0 (use b9) 0xb8 0x00 0x01 0x01 0x01
* V-Link CKG Control 0xb0 0x05 0x05 0x06 0x03
* V-Link CKG Control 0xb1 0x05 0x05 0x01 0x03
*/
/* we setup 533MB/s mode full duplex */
static void vt8237s_vlink_init(struct device *dev)
{
u8 reg;
device_t devfun7;
devfun7 = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_K8T800_NB_SB_CTR, 0);
if (!devfun7)
devfun7 = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_K8M800_NB_SB_CTR, 0);
if (!devfun7)
devfun7 = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_K8T890CE_7, 0);
if (!devfun7)
devfun7 = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_K8M890CE_7, 0);
if (!devfun7)
devfun7 = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_K8T890CF_7, 0);
/* No pairing NB was found. */
if (!devfun7)
{
printk(BIOS_DEBUG, "vt8237s_vlink_init: No pairing NB was found.\n");
return;
}
/*
* This init code is valid only for the VT8237S! For different
* southbridges (e.g. VT8237A, VT8237S, VT8237R (without plus R)
* and VT8251) a different init code is required.
*/
/* disable auto disconnect */
reg = pci_read_config8(devfun7, 0x42);
reg &= ~0x4;
pci_write_config8(devfun7, 0x42, reg);
/* NB part setup */
pci_write_config8(devfun7, 0xb5, 0x66);
pci_write_config8(devfun7, 0xb6, 0x66);
pci_write_config8(devfun7, 0xb7, 0x64);
reg = pci_read_config8(devfun7, 0xb4);
reg |= 0x1;
reg &= ~0x10;
pci_write_config8(devfun7, 0xb4, reg);
pci_write_config8(devfun7, 0xb0, 0x6);
pci_write_config8(devfun7, 0xb1, 0x1);
/* SB part setup */
pci_write_config8(dev, 0xb7, 0x60);
pci_write_config8(dev, 0xb9, 0x88);
pci_write_config8(dev, 0xba, 0x88);
pci_write_config8(dev, 0xbb, 0x89);
reg = pci_read_config8(dev, 0xbd);
reg |= 0x3;
reg &= ~0x4;
pci_write_config8(dev, 0xbd, reg);
reg = pci_read_config8(dev, 0xbc);
reg &= ~0x7;
pci_write_config8(dev, 0xbc, reg);
/* Program V-link 8X 8bit full duplex, parity enabled. */
pci_write_config8(dev, 0x48, 0x23 | 0x80);
/* enable auto disconnect, for STPGNT and HALT */
reg = pci_read_config8(devfun7, 0x42);
reg |= 0x7;
pci_write_config8(devfun7, 0x42, reg);
}
static void vt8237a_vlink_init(struct device *dev)
{
u8 reg;
device_t devfun7;
devfun7 = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_K8T800_NB_SB_CTR, 0);
if (!devfun7)
devfun7 = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_K8M800_NB_SB_CTR, 0);
if (!devfun7)
devfun7 = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_K8T890CE_7, 0);
if (!devfun7)
devfun7 = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_K8M890CE_7, 0);
if (!devfun7)
devfun7 = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_K8T890CF_7, 0);
/* No pairing NB was found. */
if (!devfun7)
{
printk(BIOS_DEBUG, "vt8237a_vlink_init: No pairing NB was found.\n");
return;
}
/*
* This init code is valid only for the VT8237A! For different
* southbridges (e.g. VT8237S, VT8237R and VT8251) a different
* init code is required.
*
* FIXME: This is based on vt8237r_vlink_init() in
* k8t890/k8t890_ctrl.c and modified to fit what the AMI
* BIOS on my M2V wrote to these registers (by looking
* at lspci -nxxx output).
* Works for me.
*/
/* disable auto disconnect */
reg = pci_read_config8(devfun7, 0x42);
reg &= ~0x4;
pci_write_config8(devfun7, 0x42, reg);
/* NB part setup */
pci_write_config8(devfun7, 0xb5, 0x88);
pci_write_config8(devfun7, 0xb6, 0x88);
pci_write_config8(devfun7, 0xb7, 0x61);
reg = pci_read_config8(devfun7, 0xb4);
reg |= 0x11;
pci_write_config8(devfun7, 0xb4, reg);
pci_write_config8(devfun7, 0xb0, 0x6);
pci_write_config8(devfun7, 0xb1, 0x1);
/* SB part setup */
pci_write_config8(dev, 0xb7, 0x50);
pci_write_config8(dev, 0xb9, 0x88);
pci_write_config8(dev, 0xba, 0x8a);
pci_write_config8(dev, 0xbb, 0x88);
reg = pci_read_config8(dev, 0xbd);
reg |= 0x3;
reg &= ~0x4;
pci_write_config8(dev, 0xbd, reg);
reg = pci_read_config8(dev, 0xbc);
reg &= ~0x7;
pci_write_config8(dev, 0xbc, reg);
pci_write_config8(dev, 0x48, 0x23);
/* enable auto disconnect, for STPGNT and HALT */
reg = pci_read_config8(devfun7, 0x42);
reg |= 0x7;
pci_write_config8(devfun7, 0x42, reg);
}
static void ctrl_enable(struct device *dev)
{
/* Enable the 0:13 and 0:13.1. */
/* FIXME */
pci_write_config8(dev, 0x4f, 0x43);
}
static void ctrl_init(struct device *dev)
{
/*
* TODO: Fix some ordering issue for V-link set Rx77[6] and
* PCI1_Rx4F[0] should to 1.
* FIXME DO you need?
*/
/*
* VT8237R specific configuration. Other SB are done in their own
* directories. TODO: Add A version.
*/
device_t devsb = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_VT8237S_LPC, 0);
if (devsb) {
vt8237s_vlink_init(dev);
}
devsb = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_VT8237A_LPC, 0);
if (devsb) {
vt8237a_vlink_init(dev);
}
/* Configure PCI1 and copy mirror registers from D0F3. */
vt8237_cfg(dev);
dump_south(dev);
}
static const struct device_operations ctrl_ops = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = ctrl_init,
.enable = ctrl_enable,
.ops_pci = 0,
};
static const struct pci_driver northbridge_driver_t __pci_driver = {
.ops = &ctrl_ops,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_VT8237_VLINK,
};
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