Add GPDMA skeleton file

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2750 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 226 insertions, 0 deletions

diff --git a/nuttx/arch/arm/src/lpc17xx/lpc17_gpdma.c b/nuttx/arch/arm/src/lpc17xx/lpc17_gpdma.c
new file mode 100755
index 000000000..1fb27ccc9
--- /dev/null
+++ b/nuttx/arch/arm/src/lpc17xx/lpc17_gpdma.c
@@ -0,0 +1,226 @@
+/****************************************************************************
+ * arch/arm/src/lpc17xx/lpc17_gpdma.c
+ *
+ *   Copyright (C) 2010 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/arch.h>
+
+#include "up_internal.h"
+#include "up_arch.h"
+
+#include "chip.h"
+#include "lpc17_internal.h"
+#include "lpc17_syscon.h"
+#include "lpc17_gpdma.h"
+
+#ifdef CONFIG_LPC17_GPDMA
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/* Enables debug output from this file (needs CONFIG_DEBUG too) */
+
+#undef DMA_DEBUG     /* Define to enable debug */
+#undef DMA_VERBOSE   /* Define to enable verbose debug */
+
+#ifdef DMA_DEBUG
+#  define dmadbg  lldbg
+#  ifdef DMA_VERBOSE
+#    define spivdbg lldbg
+#  else
+#    define spivdbg(x...)
+#  endif
+#else
+#  undef DMA_VERBOSE
+#  define dmadbg(x...)
+#  define spivdbg(x...)
+#endif
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: lpc17_dmainitialize
+ *
+ * Description:
+ *   Initialize the GPDMA subsystem.
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+void lpc17_dmainitilaize(void)
+{
+}
+
+/****************************************************************************
+ * Name: lpc17_dmachannel
+ *
+ * Description:
+ *   Allocate a DMA channel.  This function sets aside a DMA channel and
+ *   gives the caller exclusive access to the DMA channel.
+ *
+ * Returned Value:
+ *   One success, this function returns a non-NULL, void* DMA channel
+ *   handle.  NULL is returned on any failure.  This function can fail only
+ *   if no DMA channel is available.
+ *
+ ****************************************************************************/
+
+DMA_HANDLE lpc17_dmachannel(void)
+{
+  return NULL;
+}
+
+/****************************************************************************
+ * Name: lpc17_dmafree
+ *
+ * Description:
+ *   Release a DMA channel.  NOTE:  The 'handle' used in this argument must
+ *   NEVER be used again until lpc17_dmachannel() is called again to re-gain
+ *   a valid handle.
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+void lpc17_dmafree(DMA_HANDLE handle)
+{
+}
+
+/****************************************************************************
+ * Name: lpc17_dmasetup
+ *
+ * Description:
+ *   Configure DMA for one transfer.
+ *
+ ****************************************************************************/
+
+int lpc17_dmarxsetup(DMA_HANDLE handle, uint32_t control, uint32_t config,
+                     uint32_t srcaddr, uint32_t destaddr, size_t nbytes)
+{
+  return -ENOSYS;
+}
+
+/****************************************************************************
+ * Name: lpc17_dmastart
+ *
+ * Description:
+ *   Start the DMA transfer
+ *
+ ****************************************************************************/
+
+int lpc17_dmastart(DMA_HANDLE handle, dma_callback_t callback, void *arg)
+{
+  return -ENOSYS;
+}
+
+/****************************************************************************
+ * Name: lpc17_dmastop
+ *
+ * Description:
+ *   Cancel the DMA.  After lpc17_dmastop() is called, the DMA channel is
+ *   reset and lpc17_dmasetup() must be called before lpc17_dmastart() can be
+ *   called again
+ *
+ ****************************************************************************/
+
+void lpc17_dmastop(DMA_HANDLE handle)
+{
+}
+
+/****************************************************************************
+ * Name: lpc17_dmasample
+ *
+ * Description:
+ *   Sample DMA register contents
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_DEBUG_DMA
+void lpc17_dmasample(DMA_HANDLE handle, struct lpc17_dmaregs_s *regs)
+{
+}
+#endif /* CONFIG_DEBUG_DMA */
+
+/****************************************************************************
+ * Name: lpc17_dmadump
+ *
+ * Description:
+ *   Dump previously sampled DMA register contents
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_DEBUG_DMA
+void lpc17_dmadump(DMA_HANDLE handle, const struct lpc17_dmaregs_s *regs, const char *msg)
+{
+}
+#endif /* CONFIG_DEBUG_DMA */
+
+#endif /* CONFIG_LPC17_GPDMA */