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authorRudolf Marek <r.marek@assembler.cz>2007-11-13 10:47:11 +0000
committerUwe Hermann <uwe@hermann-uwe.de>2007-11-13 10:47:11 +0000
commita6ddf253ad88099d40e65e59f16a58c31f53d213 (patch)
tree8f26d71e49435305b83026426f63e52d06361750 /src/southbridge/via
parenta422c2d3c6341c7414018233c0b428414b66630f (diff)
Fine-tune the V-link bus between K8T890 and VT8237R and set
it to 8X transfer rate (up to 1066 MB/s) similar code placed here would be needed for VT8237A/S etc. Using VIA recommended values despite they are for K8T890CF, this is K8T890CE (still dont know what is exactly different). This patch enables the parity error reporting on V-Link, so it enables NMI generation for the SERR# errors. The NMI may not be generated, maybe port 61h needs some tuning too. Signed-off-by: Rudolf Marek <r.marek@assembler.cz> Acked-by: Uwe Hermann <uwe@hermann-uwe.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2958 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/southbridge/via')
-rw-r--r--src/southbridge/via/k8t890/Config.lb1
-rw-r--r--src/southbridge/via/k8t890/k8t890_ctrl.c56
-rw-r--r--src/southbridge/via/k8t890/k8t890_error.c47
3 files changed, 99 insertions, 5 deletions
diff --git a/src/southbridge/via/k8t890/Config.lb b/src/southbridge/via/k8t890/Config.lb
index e18c1a20bc..2930e9b72f 100644
--- a/src/southbridge/via/k8t890/Config.lb
+++ b/src/southbridge/via/k8t890/Config.lb
@@ -23,3 +23,4 @@ driver k8t890_host.o
driver k8t890_host_ctrl.o
driver k8t890_pcie.o
driver k8t890_traf_ctrl.o
+driver k8t890_error.o
diff --git a/src/southbridge/via/k8t890/k8t890_ctrl.c b/src/southbridge/via/k8t890/k8t890_ctrl.c
index c8ca2122d0..c57c165195 100644
--- a/src/southbridge/via/k8t890/k8t890_ctrl.c
+++ b/src/southbridge/via/k8t890/k8t890_ctrl.c
@@ -23,6 +23,56 @@
#include <device/pci_ids.h>
#include <console/console.h>
+/**
+ * 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
+ */
+static void ctrl_init(struct device *dev)
+{
+ u8 reg;
+ device_t devsb = dev_find_device(PCI_VENDOR_ID_VIA,
+ PCI_DEVICE_ID_VIA_VT8237R_LPC, 0);
+
+ if (!devsb)
+ return;
+
+ pci_write_config8(dev, 0xb5, 0x88);
+ pci_write_config8(dev, 0xb6, 0x88);
+ pci_write_config8(dev, 0xb7, 0x61);
+
+ reg = pci_read_config8(dev, 0xb4);
+ reg |= 0x11;
+ pci_write_config8(dev, 0xb4, reg);
+
+ pci_write_config8(dev, 0xb9, 0x98);
+ pci_write_config8(dev, 0xba, 0x77);
+ pci_write_config8(dev, 0xbb, 0x11);
+
+ reg = pci_read_config8(dev, 0xb8);
+ reg |= 0x1;
+ pci_write_config8(dev, 0xb8, reg);
+
+ pci_write_config8(dev, 0xb0, 0x06);
+ pci_write_config8(dev, 0xb1, 0x01);
+
+ /* Program V-link 8X 16bit full duplex, parity enabled. */
+ pci_write_config8(dev, 0x48, 0xa3);
+}
+
static void ctrl_enable(struct device *dev)
{
u8 regm, regm2, regm3;
@@ -36,11 +86,6 @@ static void ctrl_enable(struct device *dev)
/* PCI CFG Address bits[27:24] are used as extended register address
bit[11:8] */
pci_write_config8(dev, 0x47, 0x30);
-
- /* FIXME: Program V-link 8X 16bit full duplex, this needs to be fixed
- for other than VT8237R SB */
- pci_write_config8(dev, 0x48, 0x23);
-
/* Magic init. This is not well documented :/ */
pci_write_config8(dev, 0x70, 0xc2);
@@ -92,6 +137,7 @@ static struct device_operations ctrl_ops = {
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.enable = ctrl_enable,
+ .init = ctrl_init,
.ops_pci = 0,
};
diff --git a/src/southbridge/via/k8t890/k8t890_error.c b/src/southbridge/via/k8t890/k8t890_error.c
new file mode 100644
index 0000000000..49d32bf903
--- /dev/null
+++ b/src/southbridge/via/k8t890/k8t890_error.c
@@ -0,0 +1,47 @@
+/*
+ * 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 <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <console/console.h>
+
+static void error_enable(struct device *dev)
+{
+ /*
+ * bit0 - Enable V-link parity error reporting in 0x50 bit0 (RWC)
+ * bit6 - Parity Error/SERR# Report Through V-Link to SB
+ * bit7 - Parity Error/SERR# Report Through NMI
+ */
+ pci_write_config8(dev, 0x58, 0x81);
+}
+
+static const struct device_operations error_ops = {
+ .read_resources = pci_dev_read_resources,
+ .set_resources = pci_dev_set_resources,
+ .enable_resources = pci_dev_enable_resources,
+ .enable = error_enable,
+ .ops_pci = 0,
+};
+
+static const struct pci_driver northbridge_driver __pci_driver = {
+ .ops = &error_ops,
+ .vendor = PCI_VENDOR_ID_VIA,
+ .device = PCI_DEVICE_ID_VIA_K8T890CE_1,
+};