add smbus_write_byte() function. currently fails in romcc :(

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1197 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

diff --git a/src/mainboard/amd/quartet/auto.c b/src/mainboard/amd/quartet/auto.c
index 31a653d982673ee56111c61e1400ad666d169129..23951738c6219b3abc11f102e1df9fbf971ecf55 100644 (file)
--- a/src/mainboard/amd/quartet/auto.c
+++ b/src/mainboard/amd/quartet/auto.c
@@ -99,9 +99,10 @@ static inline int spd_read_byte(unsigned device, unsigned address)
        unsigned hub = device >> 8;
        
        device &= 0xff;
-       // smbus_write_byte(SMBUS_HUB, hub);
+       smbus_write_byte(SMBUS_HUB, 0x01, 1<<hub);
+       smbus_write_byte(SMBUS_HUB, 0x03, 0);
+
        return smbus_read_byte(device, address);
-       
 }
 
 /* no specific code here. this should go away completely */

diff --git a/src/southbridge/amd/amd8111/amd8111_early_smbus.c b/src/southbridge/amd/amd8111/amd8111_early_smbus.c
index e67d414933ddf7e70aa07cc69069098129f7f41d..e0aaa05ff4aa80451e3a71435a59e14006b31302 100644 (file)
--- a/src/southbridge/amd/amd8111/amd8111_early_smbus.c
+++ b/src/southbridge/amd/amd8111/amd8111_early_smbus.c
@@ -106,3 +106,35 @@ static int smbus_read_byte(unsigned device, unsigned address)
        }
        return byte;
 }
+
+static void smbus_write_byte(unsigned device, unsigned address, unsigned char val)
+{
+#if 0
+       if (smbus_wait_until_ready() < 0) {
+               return;
+       }
+
+       /* setup transaction */
+       /* disable interrupts */
+       outw(inw(SMBUS_IO_BASE + SMBGCTL) & ~((1<<10)|(1<<9)|(1<<8)|(1<<4)),
+                       SMBUS_IO_BASE + SMBGCTL);
+       /* set the device I'm talking too */
+       outw(((device & 0x7f) << 1) | 1, SMBUS_IO_BASE + SMBHSTADDR);
+       outb(address & 0xFF, SMBUS_IO_BASE + SMBHSTCMD);
+       /* set up for a byte data write */ /* FIXME */
+       outw((inw(SMBUS_IO_BASE + SMBGCTL) & ~7) | (0x1), SMBUS_IO_BASE + SMBGCTL);
+       /* clear any lingering errors, so the transaction will run */
+       /* Do I need to write the bits to a 1 to clear an error? */
+       outw(inw(SMBUS_IO_BASE + SMBGSTATUS), SMBUS_IO_BASE + SMBGSTATUS);
+
+       /* clear the data word...*/
+       outw(val, SMBUS_IO_BASE + SMBHSTDAT);
+
+       /* start the command */
+       outw((inw(SMBUS_IO_BASE + SMBGCTL) | (1 << 3)), SMBUS_IO_BASE + SMBGCTL);
+
+       /* poll for transaction completion */
+       smbus_wait_until_done();
+#endif
+       return;
+}