Author: ruik Date: 2009-09-01 17:29:12 +0200 (Tue, 01 Sep 2009) New Revision: 4625
Modified: trunk/coreboot-v2/src/southbridge/via/vt8237r/vt8237_ctrl.c Log: 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
Modified: trunk/coreboot-v2/src/southbridge/via/vt8237r/vt8237_ctrl.c =================================================================== --- trunk/coreboot-v2/src/southbridge/via/vt8237r/vt8237_ctrl.c 2009-09-01 10:03:01 UTC (rev 4624) +++ trunk/coreboot-v2/src/southbridge/via/vt8237r/vt8237_ctrl.c 2009-09-01 15:29:12 UTC (rev 4625) @@ -94,6 +94,9 @@ * 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 @@ * 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 @@ 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. */