From e7cd5acf31b0ed80ae97e53f72f0becdfd9e97da Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Sat, 7 May 2011 17:53:09 +0000
Subject: [PATCH] NXFFS test will now accept external initalization logic

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3574 42af7a65-404d-4744-a932-0658087f49c3
---
 examples/nxffs/nxffs_main.c | 46 ++++++++++++++++++++++++++++---------
 1 file changed, 35 insertions(+), 11 deletions(-)

diff --git a/examples/nxffs/nxffs_main.c b/examples/nxffs/nxffs_main.c
index b97f63737..e201f0802 100644
--- a/examples/nxffs/nxffs_main.c
+++ b/examples/nxffs/nxffs_main.c
@@ -59,23 +59,32 @@
  * Definitions
  ****************************************************************************/
 /* Configuration ************************************************************/
+/* The default is to use the RAM MTD device at drivers/mtd/rammtd.c.  But
+ * an architecture-specific MTD driver can be used instead by defining
+ * CONFIG_EXAMPLES_NXFFS_ARCHINIT.  In this case, the initialization logic
+ * will call nxffs_archinitialize() to obtain the MTD driver instance.
+ */
+
+#ifndef CONFIG_EXAMPLES_NXFFS_ARCHINIT
+
 /* This must exactly match the default configuration in drivers/mtd/rammtd.c */
 
-#ifndef CONFIG_RAMMTD_BLOCKSIZE
-#  define CONFIG_RAMMTD_BLOCKSIZE 512
-#endif
+#  ifndef CONFIG_RAMMTD_BLOCKSIZE
+#    define CONFIG_RAMMTD_BLOCKSIZE 512
+#  endif
 
-#ifndef CONFIG_RAMMTD_ERASESIZE
-#  define CONFIG_RAMMTD_ERASESIZE 4096
-#endif
+#  ifndef CONFIG_RAMMTD_ERASESIZE
+#    define CONFIG_RAMMTD_ERASESIZE 4096
+#  endif
 
-#ifndef CONFIG_EXAMPLES_NXFFS_NEBLOCKS
-#  define CONFIG_EXAMPLES_NXFFS_NEBLOCKS (32)
-#endif
+#  ifndef CONFIG_EXAMPLES_NXFFS_NEBLOCKS
+#    define CONFIG_EXAMPLES_NXFFS_NEBLOCKS (32)
+#  endif
 
-#undef CONFIG_EXAMPLES_NXFFS_BUFSIZE
-#define CONFIG_EXAMPLES_NXFFS_BUFSIZE \
+#  undef CONFIG_EXAMPLES_NXFFS_BUFSIZE
+#  define CONFIG_EXAMPLES_NXFFS_BUFSIZE \
   (CONFIG_RAMMTD_ERASESIZE * CONFIG_EXAMPLES_NXFFS_NEBLOCKS)
+#endif
 
 #ifndef CONFIG_EXAMPLES_NXFFS_MAXNAME
 #  define CONFIG_EXAMPLES_NXFFS_MAXNAME 128
@@ -135,7 +144,10 @@ struct nxffs_filedesc_s
  ****************************************************************************/
 /* Pre-allocated simulated flash */
 
+#ifndef CONFIG_EXAMPLES_NXFFS_ARCHINIT
 static uint8_t g_simflash[CONFIG_EXAMPLES_NXFFS_BUFSIZE];
+#endif
+
 static uint8_t g_fileimage[CONFIG_EXAMPLES_NXFFS_MAXFILE];
 static struct nxffs_filedesc_s g_files[CONFIG_EXAMPLES_NXFFS_MAXOPEN];
 static const char g_mountdir[] = CONFIG_EXAMPLES_NXFFS_MOUNTPT "/";
@@ -146,6 +158,14 @@ static struct mallinfo g_mmbefore;
 static struct mallinfo g_mmprevious;
 static struct mallinfo g_mmafter;
 
+/****************************************************************************
+ * External Functions
+ ****************************************************************************/
+
+#ifdef CONFIG_EXAMPLES_NXFFS_ARCHINIT
+extern FAR struct mtd_dev_s *nxffs_archinitialize(void);
+#endif
+
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
@@ -776,7 +796,11 @@ int user_start(int argc, char *argv[])
 
   /* Create and initialize a RAM MTD device instance */
 
+#ifdef CONFIG_EXAMPLES_NXFFS_ARCHINIT
+  mtd = nxffs_archinitialize();
+#else
   mtd = rammtd_initialize(g_simflash, CONFIG_EXAMPLES_NXFFS_BUFSIZE);
+#endif
   if (!mtd)
     {
       message("ERROR: Failed to create RAM MTD instance\n");