1 /* 2 * (C) Copyright 2007 3 * Stelian Pop <stelian.pop@leadtechdesign.com> 4 * Lead Tech Design <www.leadtechdesign.com> 5 * 6 * See file CREDITS for list of people who contributed to this 7 * project. 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License as 11 * published by the Free Software Foundation; either version 2 of 12 * the License, or (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 22 * MA 02111-1307 USA 23 */ 24 #ifndef __ASM_ARM_DMA_MAPPING_H 25 #define __ASM_ARM_DMA_MAPPING_H 26 27 enum dma_data_direction { 28 DMA_BIDIRECTIONAL = 0, 29 DMA_TO_DEVICE = 1, 30 DMA_FROM_DEVICE = 2, 31 }; 32 33 static void *dma_alloc_coherent(size_t len, unsigned long *handle) 34 { 35 *handle = (unsigned long)malloc(len); 36 return (void *)*handle; 37 } 38 39 static inline unsigned long dma_map_single(volatile void *vaddr, size_t len, 40 enum dma_data_direction dir) 41 { 42 return (unsigned long)vaddr; 43 } 44 45 static inline void dma_unmap_single(volatile void *vaddr, size_t len, 46 unsigned long paddr) 47 { 48 } 49 50 #endif /* __ASM_ARM_DMA_MAPPING_H */ 51