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-rw-r--r--arch/avr32/include/asm/dma-mapping.h64
1 files changed, 64 insertions, 0 deletions
diff --git a/arch/avr32/include/asm/dma-mapping.h b/arch/avr32/include/asm/dma-mapping.h
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+/*
+ * Copyright (C) 2006 Atmel Corporation
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#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,
+};
+extern void *dma_alloc_coherent(size_t len, unsigned long *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:
+ dcache_flush_range(vaddr, len);
+ break;
+ case DMA_TO_DEVICE:
+ dcache_clean_range(vaddr, len);
+ break;
+ case DMA_FROM_DEVICE:
+ dcache_invalidate_range(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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