Add logic to initialize the LPC43xx SPIFI device

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4949 42af7a65-404d-4744-a932-0658087f49c3

configs/lpc4330-xplorer/README.txt

@@ -901,7 +901,8 @@ Where <subdir> is one of the following:
       CONFIG_LPC32_CODEREDW=y        : Code Red under Windows
 
     This configuration has some special options that can be used to
-    create a block device on the SPIFI FLASH:
+    create a block device on the SPIFI FLASH.  NOTE:  CONFIG_LPC43_SPIFI=y
+    must also be defined to enable SPIFI setup support:
  
       CONFIG_SPIFI_BLKDRVR - Enable to create a block driver on the SPFI
         device.

configs/lpc4330-xplorer/include/board.h

@@ -151,6 +151,36 @@
 
 #define LPC43_CCLK                  BOARD_FCLKOUT_FREQUENCY
 
+/* SPIFI clocking **********************************************************/
+/* The SPIFI will receive clocking from a divider per the settings provided
+ * in this file.  The NuttX code will configure PLL1 as the input clock
+ * for the selected divider
+ */
+
+#if BOARD_FCLKOUT_FREQUENCY < 120000000
+#  define BOARD_SPIFI_PLL1          1           /* Use PLL1 directly */
+#  undef  BOARD_SPIFI_DIVA
+#else
+#  undef  BOARD_SPIFI_PLL1
+#  define BOARD_SPIFI_DIVA          1           /* Use IDIVA */
+#endif
+
+#undef  BOARD_SPIFI_DIVB
+#undef  BOARD_SPIFI_DIVC
+#undef  BOARD_SPIFI_DIVD
+#undef  BOARD_SPIFI_DIVE
+
+/* We need to configure the divider so that its output is as close to 120MHz
+ * without exceeding that value.
+ */
+
+#if BOARD_FCLKOUT_FREQUENCY < 120000000
+#  define BOARD_SPIFI_FREQUENCY     BOARD_FCLKOUT_FREQUENCY  /* 72Mhz? */
+#else
+#  define BOARD_SPIFI_DIVIDER       (2)         /* 204MHz / 2 = 102MHz */
+#  define BOARD_SPIFI_FREQUENCY     (102000000) /* 204MHz / 2 = 102MHz */
+#endif
+
 /* UART clocking ***********************************************************/
 /* Configure all U[S]ARTs to use the XTAL input frequency */
 

configs/lpc4330-xplorer/nsh/defconfig

@@ -659,7 +659,8 @@ CONFIG_MMCSD_HAVECARDDETECT=n
 
 #
 # This configuration has some special options that can be used to
-# create a block device on the SPIFI FLASH:
+# create a block device on the SPIFI FLASH.  NOTE:  CONFIG_LPC43_SPIFI=y
+# must also be defined to enable SPIFI setup support:
 #
 # CONFIG_SPIFI_BLKDRVR - Enable to create a block driver on the SPFI
 #   device.

configs/lpc4330-xplorer/src/up_nsh.c

@@ -44,6 +44,13 @@
 #include <debug.h>
 #include <errno.h>
 
+#include <nuttx/ramdisk.h>
+
+#include "chip.h"
+
+#ifdef CONFIG_SPIFI_BLKDRVR
+#  include "lpc43_spifi.h"
+
    /* This should be removed someday when we are confident in SPIFI */
 
 #  ifdef CONFIG_DEBUG_FS
@@ -51,32 +58,17 @@
 #    include "chip/lpc43_cgu.h"
 #    include "chip/lpc43_ccu.h"
 #  endif
-
+#endif
-#include "chip.h"
-#include <nuttx/ramdisk.h>
 
 /****************************************************************************
  * Pre-Processor Definitions
  ****************************************************************************/
-/* USB Configuration ********************************************************/
-
-/* PORT and SLOT number probably depend on the board configuration */
-
-#ifdef CONFIG_ARCH_BOARD_LPC4330_XPLORER
-#  define CONFIG_NSH_HAVEUSBDEV 1
-#else
-#  error "Unrecognized board"
-#  undef CONFIG_NSH_HAVEUSBDEV
-#endif
-
-/* Can't support USB features if USB is not enabled */
-
-#ifndef CONFIG_USBDEV
-#  undef CONFIG_NSH_HAVEUSBDEV
-#endif
-
 /* SPIFI Configuration ******************************************************/
-/* CONFIG_SPIFI_BLKDRVR - Enable to create a block driver on the SPFI device.
+/* This logic supports some special options that can be used to create a
+ * block device on the SPIFI FLASH.  NOTE:  CONFIG_LPC43_SPIFI=y must also
+ * be defined to enable SPIFI setup support:
+ *
+ * CONFIG_SPIFI_BLKDRVR - Enable to create a block driver on the SPFI device.
  * CONFIG_SPIFI_DEVNO - SPIFI minor device number.  The SPFI device will be
  *   at /dev/ramN, where N is the value of CONFIG_SPIFI_DEVNO.  Default: 0.
  * CONFIG_SPIFI_RDONLY - Create a read only device on SPIFI.
@@ -95,23 +87,32 @@
  */
 
 #ifdef CONFIG_SPIFI_BLKDRVR
+
+#  ifndef CONFIG_LPC43_SPIFI=n
+#    error "SPIFI support is not enabled (CONFIG_LPC43_SPIFI)"
+#  endif
+
 #  ifndef CONFIG_SPIFI_DEVNO
 #    define CONFIG_SPIFI_DEVNO 0
 #  endif
+
 #  ifndef CONFIG_SPIFI_OFFSET
 #    define CONFIG_SPIFI_OFFSET 0
 #  endif
+
 #  ifndef CONFIG_SPIFI_BLKSIZE
 #    define CONFIG_SPIFI_BLKSIZE 512
 #  endif
+
 #  ifndef CONFIG_SPIFI_NBLOCKS
 #    error "Need number of SPIFI blocks (CONFIG_SPIFI_NBLOCKS)"
 #  endif
-#endif
 
 #  define SPIFI_BUFFER \
          (FAR uint8_t *)(LPC43_LOCSRAM_SPIFI_BASE + CONFIG_SPIFI_OFFSET)
 
+#endif
+
 /* Debug ********************************************************************/
 
 #ifdef CONFIG_CPP_HAVE_VARARGS
@@ -151,6 +152,17 @@
 #ifdef CONFIG_SPIFI_BLKDRVR
 static int nsh_spifi_initialize(void)
 {
+  int ret;
+
+  /* Initialize the SPIFI interface */
+
+  ret = lpc43_spifi_initialize();
+  if (ret < 0)
+    {
+      fdbg("ERROR: lpc43_spifi_initialize failed: %d\n", ret);
+      return ret;
+    }
+
   /* This should be removed someday when we are confident in SPIFI */
 
 #ifdef CONFIG_DEBUG_FS