1 files changed, 43 insertions, 0 deletions
diff --git a/src/southbridge/via/common/early_smbus_wait_until_ready.c b/src/southbridge/via/common/early_smbus_wait_until_ready.c
new file mode 100644
index 0000000000..dba37ff0cd
--- /dev/null
+++ b/src/southbridge/via/common/early_smbus_wait_until_ready.c
@@ -0,0 +1,43 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013  Alexandru Gagniuc <mr.nuke.me@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "via_early_smbus.h"
+#include <console/console.h>
+
+/**
+ * \brief Wait for the SMBus to become ready to process a new transaction.
+ *
+ * @param smbus_dev The base SMBus IO port
+ */
+int smbus_wait_until_ready(u32 smbus_dev)
+{
+	int loops;
+
+	printsmbus("Waiting until SMBus ready\n");
+
+	/* Loop up to SMBUS_TIMEOUT times, waiting for bit 0 of the
+	 * SMBus Host Status register to go to 0, indicating the operation
+	 * was completed successfully. I don't remember why I did it this way,
+	 * but I think it was because ROMCC was running low on registers */
+	loops = 0;
+	while (smbus_is_busy(smbus_dev) && loops < SMBUS_TIMEOUT)
+		++loops;
+
+	return smbus_print_error(smbus_dev, inb(SMBHSTSTAT(smbus_dev)), loops);
+}