Create an MTD driver for SPIFI

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4951 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 22 insertions, 26 deletions

diff --git a/nuttx/configs/lpc4330-xplorer/nsh/defconfig b/nuttx/configs/lpc4330-xplorer/nsh/defconfig
index de4d3ff09..e6db818ca 100644
--- a/nuttx/configs/lpc4330-xplorer/nsh/defconfig
+++ b/nuttx/configs/lpc4330-xplorer/nsh/defconfig
@@ -658,35 +658,31 @@ CONFIG_MMCSD_MMCSUPPORT=n
 CONFIG_MMCSD_HAVECARDDETECT=n
 
 #
-# This configuration has some special options that can be used to
-# create a block device on the SPIFI FLASH.  NOTE:  CONFIG_LPC43_SPIFI=y
+# The SPIFI drvier has some special options that can be used to
+# create an MTD 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/rdN, where N is the value of CONFIG_SPIFI_DEVNO.
-#   Default: 0.
-# CONFIG_SPIFI_RDONLY - Create a read only device on SPIFI.
-# CONFIG_SPIFI_OFFSET - Offset the beginning of the block driver this
-#   many bytes into the device address space.  Default 0.
-# CONFIG_SPIFI_BLKSIZE - The size of one block.  SPIFI is not block
-#   oriented, so most any size of the block used in the SPIFI block
-#   device can be used.    NOTE: FAT will support only sector sizes of 512,
-#   1024, 2048, or 4096. Default: 512
-# CONFIG_SPIFI_NBLOCKS - The number of blocks in the file system,
-#   each of size CONFIG_SPIFI_BLKSIZE.  The end of the file system
-#   will be at device offset:
-#     CONFIG_SPIFI_OFFSET + CONFIG_SPIFI_BLKSIZE*CONFIG_SPIFI_NBLOCKS
-#   The must assure that this does offset does not go beyond the end
-#   of the FLASH memory.
-#
-CONFIG_SPIFI_BLKDRVR=n
-CONFIG_SPIFI_DEVNO=0
-CONFIG_SPIFI_RDONLY=n
+# SPIFI device geometry:
+#
+#   CONFIG_SPIFI_OFFSET - Offset the beginning of the block driver this many
+#     bytes into the device address space.  This offset must be an exact
+#     multiple of the erase block size (CONFIG_SPIFI_BLKSIZE). Default 0.
+#   CONFIG_SPIFI_BLKSIZE - The size of one device erase block.  If not defined
+#     then the driver will try to determine the correct erase block size by
+#     examining that data returned from spifi_initialize (which sometimes
+#     seems bad).
+#
+# Other SPIFI options
+#
+#   CONFIG_SPIFI_SECTOR512 - If defined, then the driver will report a more
+#     FAT friendly 512 byte sector size and will manage the read-modify-write
+#     operations on the larger erase block.
+#   CONFIG_SPIFI_READONLY - Define to support only read-only operations.
+#
 CONFIG_SPIFI_OFFSET=0
-CONFIG_SPIFI_BLKSIZE=512
-CONFIG_SPIFI_NBLOCKS=(1024*1024/512)
+CONFIG_SPIFI_BLKSIZE=4096
+CONFIG_SPIFI_SECTOR512=y
+CONFIG_SPIFI_RDONLY=n
 
 # TCP/IP and UDP support via uIP
 # CONFIG_NET - Enable or disable all network features