add cs5536

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2265 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 45 insertions, 0 deletions

diff --git a/src/southbridge/amd/cs5536/cs5536_early_smbus.c b/src/southbridge/amd/cs5536/cs5536_early_smbus.c
new file mode 100644
index 0000000000..0605d0cb82
--- /dev/null
+++ b/src/southbridge/amd/cs5536/cs5536_early_smbus.c
@@ -0,0 +1,45 @@
+#include "cs5536_smbus.h"
+
+#define SMBUS_IO_BASE 0x6000
+
+/* initialization for SMBus Controller */
+static int cs5536_enable_smbus(void)
+{
+	unsigned char val;
+
+	/* reset SMBUS controller */
+	outb(0, SMBUS_IO_BASE + SMB_CTRL2);
+
+	/* Set SCL freq and enable SMB controller */
+	val = inb(SMBUS_IO_BASE + SMB_CTRL2);
+	val |= ((0x20 << 1) | SMB_CTRL2_ENABLE);
+	outb(val, SMBUS_IO_BASE + SMB_CTRL2);
+
+	/* Setup SMBus host controller address to 0xEF */
+	val = inb(SMBUS_IO_BASE + SMB_ADD);
+	val |= (0xEF | SMB_ADD_SAEN);
+	outb(val, SMBUS_IO_BASE + SMB_ADD); 
+}
+
+static int smbus_read_byte(unsigned device, unsigned address)
+{
+        return do_smbus_read_byte(SMBUS_IO_BASE, device, address-1);
+}
+
+#if 0
+static int smbus_recv_byte(unsigned device)
+{
+        return do_smbus_recv_byte(SMBUS_IO_BASE, device);
+}
+
+static int smbus_send_byte(unsigned device, unsigned char val)
+{
+        return do_smbus_send_byte(SMBUS_IO_BASE, device, val);
+}
+
+
+static int smbus_write_byte(unsigned device, unsigned address, unsigned char val)
+{
+        return do_smbus_write_byte(SMBUS_IO_BASE, device, address, val);
+}
+#endif