From 3a8c1cdccda70755ab52839adb5f869eae8564ba Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Fri, 1 Nov 2013 07:50:35 -0600
Subject: [PATCH] The Mikroe STM32 F4 board now uses /dev/config for
 configuration data storage.  From Ken Pettit

---
 ChangeLog.txt                               |  3 +-
 platform/mikroe-stm32f4/Kconfig             | 10 +---
 platform/mikroe-stm32f4/mikroe_configdata.c | 66 +++++++++++++++++++--
 3 files changed, 63 insertions(+), 16 deletions(-)

diff --git a/ChangeLog.txt b/ChangeLog.txt
index 949ae7414..4c831693a 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -718,4 +718,5 @@
 	  data.  From Ken Pettit (2013-10-30).
 	* apps/nshlib/nsh_dbgcmds.c and others:  Add skip= and count=
 	  options to the hexdump command.  From Ken Pettit (2013-11-1).
-
+	* apps/platrorm/mikroe-stm32f4:  Now uses /dev/config for configuration
+	  data storage.  From Ken Pettit (2013-11-1).
diff --git a/platform/mikroe-stm32f4/Kconfig b/platform/mikroe-stm32f4/Kconfig
index 55a1475bd..a26765ccf 100644
--- a/platform/mikroe-stm32f4/Kconfig
+++ b/platform/mikroe-stm32f4/Kconfig
@@ -12,7 +12,7 @@ choice
 	default MIKROE_STM32F4_CONFIGDATA_PART
 
 config MIKROE_STM32F4_CONFIGDATA_PART
-	bool "Dedicated FLASH partition"
+	bool "Dedicated FLASH partition using /dev/config"
 
 config MIKROE_STM32F4_CONFIGDATA_FS
 	bool "File system file"
@@ -32,14 +32,6 @@ config MIKROE_STM32F4_CONFIGDATA_FILENAME
 
 endif
 
-if MIKROE_STM32F4_CONFIGDATA_PART
-
-config MIKROE_STM32F4_CONFIGDATA_PART_SIZE
-	int "Size (in erase blocks) of configuration data partition"
-	default 2
-
-endif
-
 endif
 
 endif
diff --git a/platform/mikroe-stm32f4/mikroe_configdata.c b/platform/mikroe-stm32f4/mikroe_configdata.c
index 5147a95c9..957bc0985 100644
--- a/platform/mikroe-stm32f4/mikroe_configdata.c
+++ b/platform/mikroe-stm32f4/mikroe_configdata.c
@@ -46,6 +46,8 @@
 #include <debug.h>
 
 #include <apps/platform/configdata.h>
+#include <nuttx/fs/ioctl.h>
+#include <nuttx/configdata.h>
 
 #ifdef CONFIG_PLATFORM_CONFIGDATA
 
@@ -108,6 +110,11 @@ int platform_setconfig(enum config_data_e id, int instance,
 #ifdef CONFIG_MIKROE_STM32F4_CONFIGDATA_FS
   FILE*   fd;
 #endif
+#if CONFIG_MIKROE_STM32F4_CONFIGDATA_PART
+  struct config_data_s  config;
+  int                   ret;
+  int                   fd;
+#endif
 
   switch (id)
     {
@@ -137,9 +144,29 @@ int platform_setconfig(enum config_data_e id, int instance,
         fclose(fd);
         return OK;
 
-#elif CONFIG_MIKROE_STM32F4_CONFIGDATA_PART 
-#  error This configuration not supported yet!
-#elif CONFIG_MIKROE_STM32F4_CONFIGDATA_ROM 
+#elif CONFIG_MIKROE_STM32F4_CONFIGDATA_PART
+
+        /* Try to open the /dev/config device file */
+
+        if ((fd = open("/dev/config", O_RDOK)) == -1)
+          {
+            /* Error opening the config device */
+
+            return -1;
+          }
+
+        /* Setup structure for the SETCONFIG ioctl */
+
+        config.id = (enum config_data_e)id;
+        config.instance = instance;
+        config.configdata = (FAR uint8_t *) configdata;
+        config.len = datalen;
+
+        ret = ioctl(fd, CFGDIOC_SETCONFIG, (unsigned long) &config);
+        close(fd);
+        return ret;
+
+#elif CONFIG_MIKROE_STM32F4_CONFIGDATA_ROM
 
         /* We are reading from a read-only system, so nothing to do. */
 
@@ -194,12 +221,17 @@ int platform_getconfig(enum config_data_e id, int instance,
   size_t  bytes;
   enum    config_data_e saved_id;
   int     saved_instance;
-#elif CONFIG_MIKROE_STM32F4_CONFIGDATA_ROM 
+#elif CONFIG_MIKROE_STM32F4_CONFIGDATA_ROM
   static const uint8_t touch_cal_data[] = {
-      0x9a, 0x2f, 0x00, 0x00, 
+      0x9a, 0x2f, 0x00, 0x00,
       0x40, 0xbc, 0x69, 0xfe, 0x70, 0x2e, 0x00,
       0x00, 0xb8, 0x2d, 0xdb, 0xff };
 #endif
+#if CONFIG_MIKROE_STM32F4_CONFIGDATA_PART
+  struct config_data_s  config;
+  int                   ret;
+  int                   fd;
+#endif
 
   switch (id)
     {
@@ -240,7 +272,29 @@ int platform_getconfig(enum config_data_e id, int instance,
 
         return OK;
 
-#elif CONFIG_MIKROE_STM32F4_CONFIGDATA_ROM 
+#elif CONFIG_MIKROE_STM32F4_CONFIGDATA_PART
+
+        /* Try to open the /dev/config device file */
+
+        if ((fd = open("/dev/config", O_RDOK)) == -1)
+          {
+            /* Error opening the config device */
+
+            return -1;
+          }
+
+        /* Setup structure for the SETCONFIG ioctl */
+
+        config.id = (enum config_data_e)id;
+        config.instance = instance;
+        config.configdata = configdata;
+        config.len = datalen;
+
+        ret = ioctl(fd, CFGDIOC_GETCONFIG, (unsigned long) &config);
+        close(fd);
+        return ret;
+
+#elif CONFIG_MIKROE_STM32F4_CONFIGDATA_ROM
 
         memcpy(configdata, touch_cal_data, datalen);
         return OK;