1 files changed, 43 insertions, 0 deletions
diff --git a/src/drivers/spi/spi-generic.c b/src/drivers/spi/spi-generic.c
new file mode 100644
index 0000000000..7398ee928f
--- /dev/null
+++ b/src/drivers/spi/spi-generic.c
@@ -0,0 +1,43 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2016 Google Inc.
+ *
+ * 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.
+ */
+
+#include <spi-generic.h>
+#include <string.h>
+
+int spi_claim_bus(const struct spi_slave *slave)
+{
+	const struct spi_ctrlr *ctrlr = slave->ctrlr;
+	if (ctrlr && ctrlr->claim_bus)
+		return ctrlr->claim_bus(slave);
+	return 0;
+}
+
+void spi_release_bus(const struct spi_slave *slave)
+{
+	const struct spi_ctrlr *ctrlr = slave->ctrlr;
+	if (ctrlr && ctrlr->release_bus)
+		ctrlr->release_bus(slave);
+}
+
+int spi_xfer(const struct spi_slave *slave, const void *dout, size_t bytesout,
+	     void *din, size_t bytesin)
+{
+	const struct spi_ctrlr *ctrlr = slave->ctrlr;
+	if (ctrlr && ctrlr->xfer)
+		return ctrlr->xfer(slave, dout, bytesout, din, bytesin);
+
+	return -1;
+}