1 files changed, 146 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/kinetis/kinetis_pindma.c b/nuttx/arch/arm/src/kinetis/kinetis_pindma.c
new file mode 100644
index 000000000..00d9a07e6
--- /dev/null
+++ b/nuttx/arch/arm/src/kinetis/kinetis_pindma.c
@@ -0,0 +1,146 @@
+/****************************************************************************
+ *  arch/arm/src/kinetis/kinetis_pindma.c
+ *
+ *   Copyright (C) 2011 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 <arch/board/board.h>
+#include <nuttx/config.h>
+
+#include <nuttx/arch.h>
+#include "up_internal.h"
+
+#ifdef CONFIG_KINETIS_DMA
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/************************************************************************************
+ * Name: kinetis_pindmaenable
+ *
+ * Description:
+ *   Enable DMA for specified pin
+ *
+ ************************************************************************************/
+
+void kinetis_pindmaenable(uint32_t pinset)
+{
+  uintptr_t    base;
+  uint32_t     regval;
+  unsigned int port;
+  unsigned int pin;
+
+  /* Get the port number and pin number */
+
+  port = (pinset & _PIN_PORT_MASK) >> _PIN_PORT_SHIFT;
+  pin  = (pinset & _PIN_MASK)      >> _PIN_SHIFT;
+
+  DEBUGASSERT(port < KINETIS_NPORTS);
+  if (port < KINETIS_NPORTS)
+    {
+      /* Modify the IRQC field of the port PCR register in order to enable DMA. */
+
+      regval = getreg32(base + KINETIS_PORT_PCR_OFFSET(pin));
+      regval &= ~PORT_PCR_IRQC_MASK;
+
+      switch (pinset & _PIN_INT_MASK)
+        {
+          case PIN_DMA_RISING : /* DMA Request on rising edge */
+            regval |= PORT_PCR_IRQC_DMARISING;
+            break;
+
+          case PIN_DMA_FALLING : /* DMA Request on falling edge */
+            regval |= PORT_PCR_IRQC_DMAFALLING;
+            break;
+
+          case PIN_DMA_BOTH : /* DMA Request on either edge */
+            regval |= PORT_PCR_IRQC_DMABOTH;
+            break;
+
+          default:
+            return;
+        }
+
+      putreg32(regval, base + KINETIS_PORT_PCR_OFFSET(pin));
+    }
+}
+
+/************************************************************************************
+ * Name: kinetis_pindmadisable
+ *
+ * Description:
+ *   Disable DMA for specified pin
+ *
+ ************************************************************************************/
+
+void kinetis_pindmadisable(uint32_t pinset)
+{
+  uintptr_t    base;
+  uint32_t     regval;
+  unsigned int port;
+  unsigned int pin;
+
+  /* Get the port number and pin number */
+
+  port = (pinset & _PIN_PORT_MASK) >> _PIN_PORT_SHIFT;
+  pin  = (pinset & _PIN_MASK)      >> _PIN_SHIFT;
+
+  DEBUGASSERT(port < KINETIS_NPORTS);
+  if (port < KINETIS_NPORTS)
+    {
+      /* Clear the IRQC field of the port PCR register in order to disable DMA. */
+
+      regval = getreg32(base + KINETIS_PORT_PCR_OFFSET(pin));
+      regval &= ~PORT_PCR_IRQC_MASK;
+      putreg32(regval, base + KINETIS_PORT_PCR_OFFSET(pin));
+    }
+}
+
+#endif
+