1 files changed, 127 insertions, 0 deletions
diff --git a/arch/arm/plat-s3c/include/plat/dma.h b/arch/arm/plat-s3c/include/plat/dma.h
new file mode 100644
index 0000000..34dba98
--- /dev/null
+++ b/arch/arm/plat-s3c/include/plat/dma.h
@@ -0,0 +1,127 @@
+/* arch/arm/plat-s3c/include/plat/dma.h
+ *
+ * Copyright (C) 2003,2004,2006 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * Samsung S3C DMA support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+enum s3c2410_dma_buffresult {
+	S3C2410_RES_OK,
+	S3C2410_RES_ERR,
+	S3C2410_RES_ABORT
+};
+
+enum s3c2410_dmasrc {
+	S3C2410_DMASRC_HW,		/* source is memory */
+	S3C2410_DMASRC_MEM		/* source is hardware */
+};
+
+/* enum s3c2410_chan_op
+ *
+ * operation codes passed to the DMA code by the user, and also used
+ * to inform the current channel owner of any changes to the system state
+*/
+
+enum s3c2410_chan_op {
+	S3C2410_DMAOP_START,
+	S3C2410_DMAOP_STOP,
+	S3C2410_DMAOP_PAUSE,
+	S3C2410_DMAOP_RESUME,
+	S3C2410_DMAOP_FLUSH,
+	S3C2410_DMAOP_TIMEOUT,		/* internal signal to handler */
+	S3C2410_DMAOP_STARTED,		/* indicate channel started */
+};
+
+struct s3c2410_dma_client {
+	char                *name;
+};
+
+struct s3c2410_dma_chan;
+
+/* s3c2410_dma_cbfn_t
+ *
+ * buffer callback routine type
+*/
+
+typedef void (*s3c2410_dma_cbfn_t)(struct s3c2410_dma_chan *,
+				   void *buf, int size,
+				   enum s3c2410_dma_buffresult result);
+
+typedef int  (*s3c2410_dma_opfn_t)(struct s3c2410_dma_chan *,
+				   enum s3c2410_chan_op );
+
+
+
+/* s3c2410_dma_request
+ *
+ * request a dma channel exclusivley
+*/
+
+extern int s3c2410_dma_request(unsigned int channel,
+			       struct s3c2410_dma_client *, void *dev);
+
+
+/* s3c2410_dma_ctrl
+ *
+ * change the state of the dma channel
+*/
+
+extern int s3c2410_dma_ctrl(unsigned int channel, enum s3c2410_chan_op op);
+
+/* s3c2410_dma_setflags
+ *
+ * set the channel's flags to a given state
+*/
+
+extern int s3c2410_dma_setflags(unsigned int channel,
+				unsigned int flags);
+
+/* s3c2410_dma_free
+ *
+ * free the dma channel (will also abort any outstanding operations)
+*/
+
+extern int s3c2410_dma_free(unsigned int channel, struct s3c2410_dma_client *);
+
+/* s3c2410_dma_enqueue
+ *
+ * place the given buffer onto the queue of operations for the channel.
+ * The buffer must be allocated from dma coherent memory, or the Dcache/WB
+ * drained before the buffer is given to the DMA system.
+*/
+
+extern int s3c2410_dma_enqueue(unsigned int channel, void *id,
+			       dma_addr_t data, int size);
+
+/* s3c2410_dma_config
+ *
+ * configure the dma channel
+*/
+
+extern int s3c2410_dma_config(unsigned int channel, int xferunit);
+
+/* s3c2410_dma_devconfig
+ *
+ * configure the device we're talking to
+*/
+
+extern int s3c2410_dma_devconfig(int channel, enum s3c2410_dmasrc source,
+				 unsigned long devaddr);
+
+/* s3c2410_dma_getposition
+ *
+ * get the position that the dma transfer is currently at
+*/
+
+extern int s3c2410_dma_getposition(unsigned int channel,
+				   dma_addr_t *src, dma_addr_t *dest);
+
+extern int s3c2410_dma_set_opfn(unsigned int, s3c2410_dma_opfn_t rtn);
+extern int s3c2410_dma_set_buffdone_fn(unsigned int, s3c2410_dma_cbfn_t rtn);
+
+