MIPS: implement dma_sync_* functions

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Peter Mamonov <pmamonov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 57 insertions, 0 deletions

diff --git a/arch/mips/lib/dma-default.c b/arch/mips/lib/dma-default.c
new file mode 100644
index 0000000000..9b2fe7d410
--- /dev/null
+++ b/arch/mips/lib/dma-default.c
@@ -0,0 +1,57 @@
+/*
+ * (C) Copyright 2015, 2016 Peter Mamonov <pmamonov@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * 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 <dma.h>
+#include <asm/io.h>
+
+#if defined(CONFIG_CPU_MIPS32) || \
+	defined(CONFIG_CPU_MIPS64)
+static inline void __dma_sync_mips(unsigned long addr, size_t size,
+				   enum dma_data_direction direction)
+{
+	switch (direction) {
+	case DMA_TO_DEVICE:
+		dma_flush_range(addr, addr + size);
+		break;
+
+	case DMA_FROM_DEVICE:
+		dma_inv_range(addr, addr + size);
+		break;
+
+	case DMA_BIDIRECTIONAL:
+		dma_flush_range(addr, addr + size);
+		break;
+
+	default:
+		BUG();
+	}
+}
+#else
+static inline void __dma_sync_mips(void *addr, size_t size,
+	enum dma_data_direction direction)
+{
+}
+#endif
+
+void dma_sync_single_for_cpu(unsigned long address, size_t size,
+			     enum dma_data_direction dir)
+{
+	__dma_sync_mips(address, size, dir);
+}
+
+void dma_sync_single_for_device(unsigned long address, size_t size,
+				enum dma_data_direction dir)
+{
+	__dma_sync_mips(address, size, dir);
+}