SAMA5D3x-EK: Add support board-specific PWM testing

1 files changed, 161 insertions, 0 deletions

diff --git a/nuttx/configs/sama5d3x-ek/src/sam_pwm.c b/nuttx/configs/sama5d3x-ek/src/sam_pwm.c
new file mode 100644
index 000000000..90216f4f2
--- /dev/null
+++ b/nuttx/configs/sama5d3x-ek/src/sam_pwm.c
@@ -0,0 +1,161 @@
+/************************************************************************************
+ * configs/sama5d3x-ek/src/sam_pwm.c
+ *
+ *   Copyright (C) 2013 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 <errno.h>
+#include <debug.h>
+
+#include <nuttx/pwm.h>
+#include <arch/board/board.h>
+
+#include "sam_pwm.h"
+#include "sama5d3x-ek.h"
+
+/************************************************************************************
+ * Definitions
+ ************************************************************************************/
+/* Configuration ********************************************************************/
+/* PWM.  There are no dedicated PWM output pins available to the user for PWM
+ * testing.  Care must be taken because all PWM output pins conflict with some other
+ * usage of the pin by other devices:
+ *
+ *    -----+---+---+----+--------------------
+ *     PWM  PIN PER PIO  CONFLICTS
+ *    -----+---+---+----+--------------------
+ *     PWM0 FI   B  PC28   SPI1, ISI
+ *          H    B  PB0    GMAC
+ *               B  PA20   LCDC, ISI
+ *          L    B  PB1    GMAC
+ *               B  PA21   LCDC, ISI
+ *    -----+---+---+----+--------------------
+ *     PWM1 FI   B  PC31   HDMI
+ *          H    B  PB4    GMAC
+ *               B  PA22   LCDC, ISI
+ *          L    B  PB5    GMAC
+ *               B  PE31   ISI, HDMI
+ *               B  PA23   LCDC, ISI
+ *    -----+---+---+----+--------------------
+ *     PWM2 FI   B  PC29   UART0, ISI, HDMI
+ *          H    C  PD5    HSMCI0
+ *               B  PB8    GMAC
+ *          L    C  PD6    HSMCI0
+ *               B  PB9    GMAC
+ *    -----+---+---+----+--------------------
+ *     PWM3 FI   C  PD16   SPI0, Audio
+ *          H    C  PD7    HSMCI0
+ *               B  PB12   GMAC
+ *          L    C  PD8    HSMCI0
+ *               B  PB13   GMAC
+ *    -----+---+---+----+--------------------
+ */
+
+#ifndef CONFIG_SAMA5D3X_EK_CHANNEL
+#  if defined(CONFIG_SAMA5_PWM_CHAN0)
+#    warning Assuming PWM channel 0
+#    define CONFIG_SAMA5D3X_EK_CHANNEL 0
+#  elif defined(CONFIG_SAMA5_PWM_CHAN1)
+#    warning Assuming PWM channel 1
+#    define CONFIG_SAMA5D3X_EK_CHANNEL 1
+#  elif defined(CONFIG_SAMA5_PWM_CHAN2)
+#    warning Assuming PWM channel 2
+#    define CONFIG_SAMA5D3X_EK_CHANNEL 2
+#  elif defined(CONFIG_SAMA5_PWM_CHAN3)
+#    warning Assuming PWM channel 3
+#    define CONFIG_SAMA5D3X_EK_CHANNEL 3
+#  endif
+#endif
+
+#if defined(CONFIG_PWM) && defined(CONFIG_SAMA5_PWM)
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: pwm_devinit
+ *
+ * Description:
+ *   All SAMA5 architectures must provide the following interface to work with
+ *   examples/pwm.
+ *
+ ************************************************************************************/
+
+int pwm_devinit(void)
+{
+  static bool initialized = false;
+  struct pwm_lowerhalf_s *pwm;
+  int ret;
+
+  /* Have we already initialized? */
+
+  if (!initialized)
+    {
+      /* Call sam_pwminitialize() to get an instance of the PWM interface */
+
+      pwm = sam_pwminitialize(CONFIG_SAMA5D3X_EK_CHANNEL);
+      if (!pwm)
+        {
+          dbg("Failed to get the SAMA5 PWM lower half\n");
+          return -ENODEV;
+        }
+
+      /* Register the PWM driver at "/dev/pwm0" */
+
+      ret = pwm_register("/dev/pwm0", pwm);
+      if (ret < 0)
+        {
+          adbg("pwm_register failed: %d\n", ret);
+          return ret;
+        }
+
+      /* Now we are initialized */
+
+      initialized = true;
+    }
+
+  return OK;
+}
+
+#endif /* CONFIG_PWM */