add implementation for dma_alloc_coherent(),
dma_free_coherent(), dma_map_single() and dma_free_single()
Signed-off-by: Ramon Fried <rfried....@gmail.com>
---
v2: fix warning caused by missing casts.
arch/mips/include/asm/dma-mapping.h | 48 +++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
create mode 100644 arch/mips/include/asm/dma-mapping.h
diff --git a/arch/mips/include/asm/dma-mapping.h
b/arch/mips/include/asm/dma-mapping.h
new file mode 100644
index 0000000000..387427c13b
--- /dev/null
+++ b/arch/mips/include/asm/dma-mapping.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2019
+ * Ramon Fried <rfried....@gmail.com>
+ */
+
+#ifndef __ASM_MIPS_DMA_MAPPING_H
+#define __ASM_MIPS_DMA_MAPPING_H
+
+#include <linux/dma-direction.h>
+#include <asm/addrspace.h>
+#define dma_mapping_error(x, y) 0
+
+static inline void *dma_alloc_coherent(size_t len, unsigned long *handle)
+{
+ void *vaddr = memalign(ARCH_DMA_MINALIGN,
+ ROUND(len, ARCH_DMA_MINALIGN));
+
+ *handle = CPHYSADDR((unsigned long)vaddr);
+ return (void *)(CKSEG1ADDR((unsigned long)vaddr));
+}
+
+static inline void dma_free_coherent(void *addr)
+{
+ free((void *)CPHYSADDR((unsigned long)addr));
+}
+
+static inline unsigned long dma_map_single(volatile void *vaddr, size_t len,
+ enum dma_data_direction dir)
+{
+ unsigned long dma_addr = CPHYSADDR((unsigned long)vaddr);
+
+ if (dir == DMA_TO_DEVICE)
+ flush_dcache_range((unsigned long)vaddr,
+ (unsigned long)vaddr + len);
+ if (dir == DMA_FROM_DEVICE)
+ invalidate_dcache_range((unsigned long)vaddr,
+ (unsigned long)vaddr + len);
+
+ return dma_addr;
+}
+
+static inline void dma_unmap_single(volatile void *vaddr, size_t len,
+ unsigned long paddr)
+{
+}
+
+#endif /* __ASM_MIPS_DMA_MAPPING_H */
--
2.21.0
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
https://lists.denx.de/listinfo/u-boot
