1 files changed, 78 insertions, 0 deletions

diff --git a/firmware/target/arm/tms320dm320/dma-dm320.c b/firmware/target/arm/tms320dm320/dma-dm320.c
new file mode 100644
index 0000000000..e60102b6fb
--- /dev/null
+++ b/firmware/target/arm/tms320dm320/dma-dm320.c
@@ -0,0 +1,78 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2011 by Tomasz Moń
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+#include "config.h"
+#include "kernel.h"
+#include "thread.h"
+#include "system.h"
+#include "dma-target.h"
+#include "dm320.h"
+#include <stdbool.h>
+
+void dma_init(void)
+{
+    /* TODO */
+}
+
+/*
+   Requests channel for peripheral.
+   Returns channel assigned for caller which must be released after
+   transfer complete using dma_release_channel().
+*/
+int dma_request_channel(int peripheral, int mode)
+{
+    /* TODO: proper checking if channel is already taken
+       currently only SDMMC and DSP uses DMA on this target */
+    int channel = -1;
+
+    if (peripheral == DMA_PERIPHERAL_MMCSD)
+    {
+        /* Set first DMA channel */
+        IO_SDRAM_SDDMASEL = (IO_SDRAM_SDDMASEL & 0xFFE0) | peripheral | 
+                            (mode << 3);
+        channel = 1;
+    }
+    else if (peripheral == DMA_PERIPHERAL_DSP)
+    {
+        /* Set second DMA channel */
+        IO_SDRAM_SDDMASEL = (IO_SDRAM_SDDMASEL & 0xFC1F) | 
+                            (peripheral << 5) |
+                            (mode << 8);
+        channel = 2;
+    }
+    else if (peripheral == DMA_PERIPHERAL_SIF)
+    {
+        IO_SDRAM_SDDMASEL = (IO_SDRAM_SDDMASEL & 0x83FF) |
+                            (peripheral << 10) |
+                            (mode << 13);
+        channel = 3;
+    }
+
+    return channel;
+}
+
+void dma_release_channel(int channel)
+{
+    (void)channel;
+    /* TODO */
+}
+
+