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/*
* Copyright (C) 2006 Atmel Corporation
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __ASM_AVR32_DMA_MAPPING_H
#define __ASM_AVR32_DMA_MAPPING_H
#include <asm/io.h>
#include <asm/arch/cacheflush.h>
enum dma_data_direction {
DMA_BIDIRECTIONAL = 0,
DMA_TO_DEVICE = 1,
DMA_FROM_DEVICE = 2,
};
static inline void *dma_alloc_coherent(size_t len, unsigned long *handle)
{
*handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len);
return (void *)*handle;
}
static inline unsigned long dma_map_single(volatile void *vaddr, size_t len,
enum dma_data_direction dir)
{
extern void __bad_dma_data_direction(void);
switch (dir) {
case DMA_BIDIRECTIONAL:
flush_dcache_range((unsigned long)vaddr,
(unsigned long)vaddr + len);
break;
case DMA_TO_DEVICE:
dcache_clean_range(vaddr, len);
break;
case DMA_FROM_DEVICE:
invalidate_dcache_range((unsigned long)vaddr,
(unsigned long)vaddr + len);
break;
default:
/* This will cause a linker error */
__bad_dma_data_direction();
}
return virt_to_phys(vaddr);
}
static inline void dma_unmap_single(volatile void *vaddr, size_t len,
unsigned long paddr)
{
}
#endif /* __ASM_AVR32_DMA_MAPPING_H */
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