1 /*
2 * Copyright (C) 2006 Atmel Corporation
3 *
4 * See file CREDITS for list of people who contributed to this
5 * project.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20 * MA 02111-1307 USA
21 */
22 #ifndef __ASM_AVR32_DMA_MAPPING_H
23 #define __ASM_AVR32_DMA_MAPPING_H
24
25 #include <asm/io.h>
26 #include <asm/arch/cacheflush.h>
27
28 enum dma_data_direction {
29 DMA_BIDIRECTIONAL = 0,
30 DMA_TO_DEVICE = 1,
31 DMA_FROM_DEVICE = 2,
32 };
33 extern void *dma_alloc_coherent(size_t len, unsigned long *handle);
34
dma_map_single(volatile void * vaddr,size_t len,enum dma_data_direction dir)35 static inline unsigned long dma_map_single(volatile void *vaddr, size_t len,
36 enum dma_data_direction dir)
37 {
38 extern void __bad_dma_data_direction(void);
39
40 switch (dir) {
41 case DMA_BIDIRECTIONAL:
42 dcache_flush_range(vaddr, len);
43 break;
44 case DMA_TO_DEVICE:
45 dcache_clean_range(vaddr, len);
46 break;
47 case DMA_FROM_DEVICE:
48 dcache_invalidate_range(vaddr, len);
49 break;
50 default:
51 /* This will cause a linker error */
52 __bad_dma_data_direction();
53 }
54
55 return virt_to_phys(vaddr);
56 }
57
dma_unmap_single(volatile void * vaddr,size_t len,unsigned long paddr)58 static inline void dma_unmap_single(volatile void *vaddr, size_t len,
59 unsigned long paddr)
60 {
61
62 }
63
64 #endif /* __ASM_AVR32_DMA_MAPPING_H */
65