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-rw-r--r--firmware/target/arm/s3c2440/dma-target.h59
1 files changed, 59 insertions, 0 deletions
diff --git a/firmware/target/arm/s3c2440/dma-target.h b/firmware/target/arm/s3c2440/dma-target.h
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+++ b/firmware/target/arm/s3c2440/dma-target.h
@@ -0,0 +1,59 @@
+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright 2009 by Bob Cousins
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#ifndef _DMA_TARGET_H
+#define _DMA_TARGET_H
+
+#include <stdbool.h>
+#include <stdlib.h>
+
+/* DMA Channel assignments */
+#ifdef GIGABEAT_F
+#define DMA_CHAN_ATA 0
+#define DMA_CHAN_AUDIO_OUT 2
+#elif defined(MINI2440)
+#define DMA_CHAN_SD 0
+#define DMA_CHAN_AUDIO_OUT 2
+#else
+#error Unsupported target
+#endif
+
+struct dma_request
+{
+ volatile void *source_addr;
+ volatile void *dest_addr;
+ unsigned long count;
+ unsigned long source_control;
+ unsigned long dest_control;
+ unsigned long source_map;
+ unsigned long control;
+ void (*callback)(void);
+};
+
+void dma_init(void);
+void dma_enable_channel(int channel, struct dma_request *request);
+
+inline void dma_disable_channel(int channel);
+
+void dma_retain(void);
+void dma_release(void);
+
+#endif