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authorRudolf Marek <r.marek@assembler.cz>2009-09-01 15:29:12 +0000
committerRudolf Marek <r.marek@assembler.cz>2009-09-01 15:29:12 +0000
commiteed10364ceffbc8f3f89742eba3efc0860e84cba (patch)
tree9c2df67ac371334a24a743b931babb30e602afe9
parent37f3935029cef0616fa36b9c822496e3e51f03ba (diff)
downloadcoreboot-eed10364ceffbc8f3f89742eba3efc0860e84cba.tar.xz
As more users of Asus M2V-MX SE emerged. Here is long pending patch I wanted to
write. It boots the SB/NB V-link performance to full duplex 533MB/s. (in fact x2 for FDX) The default was 266MB/s but half duplex only. If you encourage any stability issues we need to look into fine tuning the bus. The values are VIA recommended. Signed-off-by: Rudolf Marek <r.marek@assembler.cz> Acked-by: Stefan Reinauer <stepan@coresystems.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4625 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
-rw-r--r--src/southbridge/via/vt8237r/vt8237_ctrl.c37
1 files changed, 31 insertions, 6 deletions
diff --git a/src/southbridge/via/vt8237r/vt8237_ctrl.c b/src/southbridge/via/vt8237r/vt8237_ctrl.c
index 0af20d37cb..da7f633821 100644
--- a/src/southbridge/via/vt8237r/vt8237_ctrl.c
+++ b/src/southbridge/via/vt8237r/vt8237_ctrl.c
@@ -94,6 +94,9 @@ static void vt8237_cfg(struct device *dev)
* 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;
@@ -114,24 +117,47 @@ static void vt8237s_vlink_init(struct device *dev)
* 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, 0x65);
+ 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(dev, 0xb9, 0x68);
+ 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);
- /* Program V-link 8X 8bit full duplex, parity disabled. FIXME. */
- pci_write_config8(dev, 0x48, 0x13);
+ 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 ctrl_enable(struct device *dev)
@@ -158,8 +184,7 @@ static void ctrl_init(struct device *dev)
device_t devsb = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_VT8237S_LPC, 0);
if (devsb) {
- /* FIXME: Skip v-link setup for now. */
-// vt8237s_vlink_init(dev);
+ vt8237s_vlink_init(dev);
}
/* Configure PCI1 and copy mirror registers from D0F3. */