SAMA5D3x-EK: Add support for the apps/examples/i2schar test

configs/sama5d3x-ek/Kconfig

@@ -20,7 +20,7 @@ config SAMA5_MT47H64M16HR
 	---help---
 		Micron 1Gbit x16 DDR2-800 64Mb
 
-endchoice
+endchoice # SAMA5D3x-EK DRAM Type
 
 config SAMA5_NOR_MAIN
 	bool "Build nor_main"
@@ -78,7 +78,7 @@ config SAMA5_AT25_NXFFS
 		a wear-leveling, NuttX FLASH file system (NXFFS).  The downside of
 		NXFFS is that it can be very slow.
 
-endchoice
+endchoice # AT25 serial FLASH configuration
 
 config SAMA5_AT24_AUTOMOUNT
 	bool "AT24 Serial EEPROM auto-mount"
@@ -119,7 +119,7 @@ config SAMA5_AT24_NXFFS
 		a wear-leveling, NuttX FLASH file system (NXFFS).  The downside of
 		NXFFS is that it can be very slow.
 
-endchoice
+endchoice # AT24 serial EPPROM configuration
 
 config SAMA5D3X_EK_CHANNEL
 	int "PWM channel number"
@@ -134,3 +134,33 @@ config SAMA5D3X_EK_CHANNEL
 		test.  See apps/examples/pwm.
 
 endif
+
+if AUDIO_I2SCHAR && (SAMA5_SSC0 || SAMA5_SSC1)
+
+if SAMA5_SSC0 && SAMA5_SSC1
+
+config SAMA5D3X_EK_SSC_PORT
+	int "SSC port number"
+	default 0
+	range 0 1
+	---help---
+		Specify the I2S port to use, i.e., 0 for SSC0 or 1 for SSC1
+
+else
+
+config SAMA5D3X_EK_SSC_PORT
+	int
+	default 0 if SAMA5_SSC0
+	default 1 if SAMA5_SSC1
+
+endif # SAMA5_SSC0 && SAMA5_SSC1
+
+config SAMA5D3X_EK_I2SCHAR_MINOR
+	int "I2S character driver minor number"
+	default 0
+	---help---
+		The minor device number to use when registering the I2S character
+		device.  The driver will be registered at /dev/is2charN where N is
+		the value provided by this setting.
+
+endif # ARCH_BOARD_SAMA5D3X_EK

configs/sama5d3x-ek/src/Makefile

@@ -118,6 +118,16 @@ ifeq ($(CONFIG_CAN),y)
 CSRCS += sam_can.c
 endif
 
+ifeq ($(CONFIG_AUDIO_I2SCHAR),y)
+ifeq ($(CONFIG_SAMA5_SSC0),y)
+CSRCS += sam_i2schar.c
+else
+ifeq ($(CONFIG_SAMA5_SSC1),y)
+CSRCS += sam_i2schar.c
+endif
+endif
+endif
+
 ifeq ($(CONFIG_USBMSC),y)
 CSRCS += sam_usbmsc.c
 endif

configs/sama5d3x-ek/src/sam_i2schar.c

+/************************************************************************************
+ * configs/sama5d3x-ek/src/sam_i2schar.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/audio/i2s.h>
+
+#include "sam_ssc.h"
+#include "sama5d3x-ek.h"
+
+#if defined(CONFIG_AUDIO_I2SCHAR) && \
+   (defined(CONFIG_SAMA5_SSC0) || defined(CONFIG_SAMA5_SSC1))
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+#ifndef CONFIG_SAMA5D3X_EK_SSC_PORT
+#  if defined(CONFIG_SAMA5_SSC0)
+#    define CONFIG_SAMA5D3X_EK_SSC_PORT 0
+#  elif defined(CONFIG_SAMA5_SSC1)
+#    define CONFIG_SAMA5D3X_EK_SSC_PORT 1
+#  endif
+#endif
+
+#ifndef CONFIG_SAMA5D3X_EK_I2SCHAR_MINOR
+#  define CONFIG_SAMA5D3X_EK_I2SCHAR_MINOR 0
+#endif
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: i2schar_devinit
+ *
+ * Description:
+ *   All architectures must provide the following interface in order to work with
+ *   apps/examples/i2schar.
+ *
+ ************************************************************************************/
+
+int i2schar_devinit(void)
+{
+  static bool initialized = false;
+  struct i2s_dev_s *i2s;
+  int ret;
+
+  /* Have we already initialized? */
+
+  if (!initialized)
+    {
+      /* Call sam_ssc_initialize() to get an instance of the SSC/I2S interface */
+
+      i2s = sam_ssc_initialize(CONFIG_SAMA5D3X_EK_SSC_PORT);
+      if (!i2s)
+        {
+          dbg("ERROR: Failed to get the SAMA5 SSC/I2S driver for SSC%d\n",
+              CONFIG_SAMA5D3X_EK_SSC_PORT);
+          return -ENODEV;
+        }
+
+      /* Register the I2S character driver at "/dev/i2schar0" */
+
+      ret = i2schar_register(i2s, CONFIG_SAMA5D3X_EK_I2SCHAR_MINOR);
+      if (ret < 0)
+        {
+          adbg("ERROR: i2schar_register failed: %d\n", ret);
+          return ret;
+        }
+
+      /* Now we are initialized */
+
+      initialized = true;
+    }
+
+  return OK;
+}
+
+#endif /* CONFIG_AUDIO_I2SCHAR && (CONFIG_SAMA5_SSC0 || CONFIG_SAMA5_SSC1) */