SB600 has four write once LPC ROM protect areas. It is not possible to write

enable that area once the register is set so print a warning.

Signed-off-by: Marc Jones <marcj.jones@amd.com>
Acked-by: Ronald G. Minnich <rminnich@gmail.com>
Acked-by: Peter Stuge <peter@stuge.se>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3659 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

diff --git a/util/flashrom/chipset_enable.c b/util/flashrom/chipset_enable.c
index c6aa876b993e4a4038a664f793b643006b915a66..22c40dffb21f1c43188eadb0e8cca26dae40c352 100644 (file)
--- a/util/flashrom/chipset_enable.c
+++ b/util/flashrom/chipset_enable.c
@@ -571,6 +571,26 @@ static int enable_flash_amd8111(struct pci_dev *dev, const char *name)
        return 0;
 }
 
+static int enable_flash_sb600(struct pci_dev *dev, const char *name)
+{
+       uint32_t old, new;
+       uint8_t reg;
+
+       /* Clear ROM Protect 0-3 */
+       for (reg = 0x50; reg < 0x60; reg+=4) {
+               old = pci_read_long(dev, reg);
+               new = old & 0xFFFFFFFC;
+               if (new != old) {
+                       pci_write_byte(dev, reg, new);
+                       if (pci_read_long(dev, reg) != new) {
+                               printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n", 0x50, new, name);
+                       }
+               }
+       }
+
+       return 0;
+}
+
 static int enable_flash_ck804(struct pci_dev *dev, const char *name)
 {
        uint8_t old, new;
@@ -744,6 +764,7 @@ static const FLASH_ENABLE enables[] = {
        {0x1039, 0x0008, "SiS5595",             enable_flash_sis5595},
        {0x1022, 0x2080, "AMD CS5536",          enable_flash_cs5536},
        {0x1022, 0x7468, "AMD8111",             enable_flash_amd8111},
+       {0x1002, 0x438D, "ATI(AMD) SB600",      enable_flash_sb600},
        {0x10B9, 0x1533, "ALi M1533",           enable_flash_ali_m1533},
        {0x10de, 0x0050, "NVIDIA CK804",        enable_flash_ck804}, /* LPC */
        {0x10de, 0x0051, "NVIDIA CK804",        enable_flash_ck804}, /* Pro */