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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
This commit is contained in:
Rudolf Marek 2009-09-01 15:29:12 +00:00
parent 37f3935029
commit eed10364ce
1 changed files with 31 additions and 6 deletions
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37
src/southbridge/via/vt8237r/vt8237_ctrl.c
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@ -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. */