The MSI MS-7031 is based on an ATI IXP300 south bridge. On this south
bridge, accessible I/O ports must be enabled explicitly. Unfortunately
the BIOS forgets to enable access to the hardware monitoring chip I/O
ports, so hardware monitoring fails.
Add a quirk enabling access to the required ports (0x295-0x296). This
is exactly what MSI's own hardware monitoring application is doing, so
it has to be the right way.
Signed-off-by: Jean Delvare <khali at linux-fr.org>
---
drivers/pci/quirks.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
--- linux-2.6.30-rc6.orig/drivers/pci/quirks.c 2009-04-30 08:45:23.000000000 +0200
+++ linux-2.6.30-rc6/drivers/pci/quirks.c 2009-05-20 21:28:56.000000000 +0200
@@ -2464,6 +2464,30 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_I
#endif /* CONFIG_PCI_IOV */
+#if defined CONFIG_X86 && (defined CONFIG_HWMON || defined CONFIG_HWMON_MODULE)
+/* Open access to 0x295-0x296 (hardware monitoring chip) on MSI MS-7031 */
+static void __devinit ati_ixp300_open_ioport(struct pci_dev *dev)
+{
+ u16 base;
+ u8 enable;
+
+ if (!(dev->subsystem_vendor == 0x1462 && /* MSI */
+ dev->subsystem_device == 0x0031)) /* MS-7031 */
+ return;
+
+ pci_read_config_byte(dev, 0x48, &enable);
+ pci_read_config_word(dev, 0x64, &base);
+
+ if (base == 0 && !(enable & BIT(2))) {
+ dev_info(&dev->dev, "Opening wide generic port at 0x295\n");
+ pci_write_config_word(dev, 0x64, 0x295);
+ pci_write_config_byte(dev, 0x48, enable | BIT(2));
+ }
+}
+
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, 0x436c, ati_ixp300_open_ioport);
+#endif /* CONFIG_X86 && CONFIG_HWMON */
+
static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f,
struct pci_fixup *end)
{
--
Jean Delvare
