New port: FiiO M3K on bare metal

Change-Id: I7517e7d5459e129dcfc9465c6fbd708619888fbe

1 files changed, 69 insertions, 0 deletions

diff --git a/firmware/target/mips/ingenic_x1000/dma-x1000.h b/firmware/target/mips/ingenic_x1000/dma-x1000.h
new file mode 100644
index 0000000000..d836a0cf54
--- /dev/null
+++ b/firmware/target/mips/ingenic_x1000/dma-x1000.h
@@ -0,0 +1,69 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2021 Aidan MacDonald
+ *
+ * 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_X1000_H__
+#define __DMA_X1000_H__
+
+#include "x1000/dma.h"
+#include "x1000/dma_chn.h"
+#include <stdint.h>
+
+/* Events passed to DMA callbacks */
+#define DMA_EVENT_NONE      0   /* Not used by DMA code but can be used as
+                                 * a sentinel value to indicate "no event" */
+#define DMA_EVENT_INTERRUPT 1   /* Interrupt on a non-final descriptor */
+#define DMA_EVENT_COMPLETE  2   /* Completed the final descriptor */
+#define DMA_EVENT_ERROR     3   /* Some kind of error occurred */
+
+/* All DMA channels which use interrupts must be statically defined here.
+ * The channel numbering should be contiguous, and lower channel numbers
+ * will have lower interrupt latency because they're serviced first.
+ *
+ * Channels >= DMA_NUM_USED_CHANNELS will NOT have interrupts serviced!
+ * Due to the possibility of address error interrupts that can occur even
+ * if no interrupts are requested on the channel, the unallocated channels
+ * cannot be used safely.
+ */
+#define DMA_CHANNEL_AUDIO     0
+#define DMA_CHANNEL_FBCOPY    1
+#define DMA_NUM_USED_CHANNELS 2
+
+struct dma_desc {
+    uint32_t cm; /* meaning and layout same as DMA_CHN_CM */
+    uint32_t sa; /* source address */
+    uint32_t ta; /* target address */
+    uint32_t tc; /* low 24 bits: transfer count
+                  * upper 8 bits: offset to next descriptor
+                  */
+    uint32_t sd; /* same as DMA_CHN_SD */
+    uint32_t rt; /* request type, same as DMA_CHN_RT */
+    uint32_t pad0;
+    uint32_t pad1;
+} __attribute__((aligned(32)));
+
+typedef struct dma_desc dma_desc;
+
+typedef void(*dma_cb_func)(int event);
+
+extern void dma_init(void);
+extern void dma_set_callback(int chn, dma_cb_func cb);
+
+#endif /* __DMA_X1000_H__ */