1 files changed, 58 insertions, 0 deletions
diff --git a/drivers/marvell/ddr_phy_access.c b/drivers/marvell/ddr_phy_access.c
new file mode 100644
index 0000000..352d1ef
--- /dev/null
+++ b/drivers/marvell/ddr_phy_access.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2021 Marvell International Ltd.
+ *
+ * SPDX-License-Identifier:     BSD-3-Clause
+ * https://spdx.org/licenses
+ */
+
+#include "ddr_phy_access.h"
+#include <lib/mmio.h>
+#include <drivers/marvell/ccu.h>
+#include <errno.h>
+
+#define DDR_PHY_END_ADDRESS	0x100000
+
+#ifdef DDR_PHY_DEBUG
+#define debug_printf(...) printf(__VA_ARGS__)
+#else
+#define debug_printf(...)
+#endif
+
+
+/*
+ * This routine writes 'data' to specified 'address' offset,
+ * with optional debug print support
+ */
+int snps_fw_write(uintptr_t offset, uint16_t data)
+{
+	debug_printf("In %s\n", __func__);
+
+	if (offset < DDR_PHY_END_ADDRESS) {
+		mmio_write_16(DDR_PHY_BASE_ADDR + (2 * offset), data);
+		return 0;
+	}
+	debug_printf("%s: illegal offset value: 0x%x\n", __func__, offset);
+	return -EINVAL;
+}
+
+int snps_fw_read(uintptr_t offset, uint16_t *read)
+{
+	debug_printf("In %s\n", __func__);
+
+	if (offset < DDR_PHY_END_ADDRESS) {
+		*read = mmio_read_16(DDR_PHY_BASE_ADDR + (2 * offset));
+		return 0;
+	}
+	debug_printf("%s: illegal offset value: 0x%x\n", __func__, offset);
+	return -EINVAL;
+}
+
+int mvebu_ddr_phy_write(uintptr_t offset, uint16_t data)
+{
+	return snps_fw_write(offset, data);
+}
+
+int mvebu_ddr_phy_read(uintptr_t offset, uint16_t *read)
+{
+	return snps_fw_read(offset, read);
+}