Condition out most of the recent NXFFS changes for NAND. NXFFS will never be able to support NAND

2013-12-03 13:11:11 -06:00 · 2013-12-03 13:11:11 -06:00 · 534def7212
commit 534def7212
parent 5a1350b475
2 changed files with 148 additions and 48 deletions
--- a/configs/sama5d3x-ek/README.txt
+++ b/configs/sama5d3x-ek/README.txt
@ -1351,6 +1351,10 @@ SDRAM Support

 NAND Support
 ============
+  NAND support is only partial and there is no file system that works with
+  it properly.  It should be considered a work in progress.  You will not
+  want to use NAND unless you are interested in investing a little effort.
+  See the STATUS section below.

  NAND Support
  ------------
@ -1358,6 +1362,10 @@ NAND Support
  NAND Support can be added to the NSH configuration by modifying the
  NuttX configuration file as follows:

+    Build Setup
+      CONFIG_EXPERIMENTAL=y             : NXFFS implemention is incomplete and
+                                        : not yet fully functional.
+
    System Type -> SAMA5 Peripheal support
      CONFIG_SAMA5_DMAC1=y              : Use DMA1 for memory-to-memory DMA
      CONFIG_SAMA5_HSMC=y               : Make sure that the SMC is enabled
@ -1366,7 +1374,7 @@ NAND Support
      CONFIG_MTD=y                      : Enable MTD support
      CONFIG_MTD_NAND=y                 : Enable NAND support
      CONFIG_MTD_NAND_BLOCKCHECK=n      : Interferes with NXFFS bad block checking
-      CONFIG_MTD_NAND_HWECC=y           : Use H/W ECC calculation
+      CONFIG_MTD_NAND_SWECC=y           : Use S/W ECC calculation

      Defaults for all other NAND settings should be okay

@ -1374,9 +1382,7 @@ NAND Support
      CONFIG_SAMA5_EBICS3=y             : Enable External CS3 memory
      CONFIG_SAMA5_EBICS3_NAND=y        : Select NAND memory type
      CONFIG_SAMA5_EBICS3_SIZE=8388608  : Use this size
-      CONFIG_SAMA5_EBICS3_PMECC=y       : Use H/W ECC calculation
-      CONFIG_SAMA5_PMECC_EMBEDDEDALGO=n : Use the software PMECC algorithm
-      CONFIG_SAMA5_PMECC_GALOIS_ROMTABLES=y : use the ROM Galois tables
+      CONFIG_SAMA5_EBICS3_SWECC=y       : Use S/W ECC calculation

      Defaults for ROM page table addresses should be okay

@ -1423,25 +1429,25 @@ NAND Support
      does the job a little-at-a-time so that there is no massive clean-up
      when the FLASH becomes full.

-      WARNING:  This will wipe out everything that you may have on the NAND
-      FLASH!  I have found that using the JTAG with no valid image on NAND
-      or Serial FLASH is a problem:  In that case, the code always ends up
-      in the SAM-BA bootloader.
-
-      The work around for this case is to put the NORBOOT image into Serial
-      FLASH.  Then, the system will boot from Serial FLASH by copying the
-      NORBOOT image in SRAM which will run and then start the image in NOR
-      FLASH.  See the discussion of the NORBOOT configuration in the
-      "Creating and Using NORBOOT" section above.
-
-      NOTES: (1) There is jumper on the CM module that must be closed to
-      enable use of the AT25 Serial Flash.  (2) If using SAM-BA, make sure
-      that you load the NOR boot program into the boot area via the pull-
-      down menu.
-
    Application Configuration -> NSH Library
     CONFIG_NSH_ARCHINIT=y              : Use architecture-specific initialization

+    WARNING:  This will wipe out everything that you may have on the NAND
+    FLASH!  I have found that using the JTAG with no valid image on NAND
+    or Serial FLASH is a problem:  In that case, the code always ends up
+    in the SAM-BA bootloader.
+
+    The work around for this case is to put the NORBOOT image into Serial
+    FLASH.  Then, the system will boot from Serial FLASH by copying the
+    NORBOOT image in SRAM which will run and then start the image in NOR
+    FLASH.  See the discussion of the NORBOOT configuration in the
+    "Creating and Using NORBOOT" section above.
+
+    NOTES: (1) There is jumper on the CM module that must be closed to
+    enable use of the AT25 Serial Flash.  (2) If using SAM-BA, make sure
+    that you load the NOR boot program into the boot area via the pull-
+    down menu.
+
    Using NAND
    ----------

@ -1474,6 +1480,38 @@ NAND Support
      nsh> mount
        /mnt/mystuff type nxffs

+  STATUS
+  ------
+
+  1. PMECC has not been test and is, most likely, non-functional.
+
+  2. DMA works (with software ECC), but is see occasional wild memory
+     clobbering.  DMA should not be used until this problem can be
+     worked out.
+
+  3. NXFFS does not work with NAND. NAND differs from other other FLASH
+     types several ways.  For one thing, NAND requires error correction
+     (ECC) bytes that must be set in order to work around bit failures.
+     This affects NXFFS in two ways:
+
+     a. First, write failures are not fatal. Rather, they should be tried by
+        bad blocks and simply ignored.  This is because unrecoverable bit
+        failures will cause read failures when reading from NAND.  Setting
+        the CONFIG_EXPERIMENTAL+CONFIG_NXFFS_NANDs option will enable this
+        behavior.
+
+     b. Secondly, NXFFS will write a block many times.  It tries to keep
+        bits in the erased state and assumes that it can overwrite those bits
+        to change them from the erased to the non-erased state.  This works
+        will with NOR-like FLASH.  NAND behaves this way too.  But the
+        problem with NAND is that the ECC bits cannot be re-written in this
+        way.  So once a block has been written, it cannot be modified.  This
+        behavior has NOT been fixed in NXFFS.  Currently, NXFFS will attempt
+        to re-write the ECC bits causing the ECC to become corrupted because
+        the ECC bits cannot be overwritten without erasing the entire block.
+
+     This may prohibit NXFFS from ever being used with NAND.
+
 AT24 Serial EEPROM
 ==================

--- a/configs/sim/nxffs/defconfig
+++ b/configs/sim/nxffs/defconfig
@ -38,24 +38,9 @@ CONFIG_HOST_LINUX=y
 #
 # Debug Options
 #
-CONFIG_DEBUG=y
-# CONFIG_DEBUG_VERBOSE is not set
-
-#
-# Subsystem Debug Options
-#
-# CONFIG_DEBUG_MM is not set
-# CONFIG_DEBUG_SCHED is not set
-CONFIG_DEBUG_FS=y
-# CONFIG_DEBUG_LIB is not set
-# CONFIG_DEBUG_BINFMT is not set
-# CONFIG_DEBUG_GRAPHICS is not set
-
-#
-# Driver Debug Options
-#
-# CONFIG_DEBUG_ANALOG is not set
-# CONFIG_DEBUG_GPIO is not set
+# CONFIG_DEBUG is not set
+# CONFIG_ARCH_HAVE_STACKCHECK is not set
+# CONFIG_ARCH_HAVE_HEAPCHECK is not set
 CONFIG_DEBUG_SYMBOLS=y

 #
@ -80,10 +65,6 @@ CONFIG_ARCH="sim"
 # CONFIG_SIM_M32 is not set
 # CONFIG_SIM_WALLTIME is not set

-#
-# External Memory Configuration
-#
-
 #
 # Architecture Options
 #
@ -104,8 +85,6 @@ CONFIG_ARCH="sim"
 #
 CONFIG_BOARD_LOOPSPERMSEC=5000
 # CONFIG_ARCH_CALIBRATION is not set
-CONFIG_RAM_START=
-CONFIG_RAM_SIZE=

 #
 # Boot options
@ -116,6 +95,12 @@ CONFIG_BOOT_RUNFROMFLASH=y
 # CONFIG_BOOT_RUNFROMSDRAM is not set
 # CONFIG_BOOT_COPYTORAM is not set

+#
+# Boot Memory Configuration
+#
+CONFIG_RAM_START=0x0
+CONFIG_RAM_SIZE=0
+
 #
 # Board Selection
 #
@ -195,28 +180,48 @@ CONFIG_DEV_NULL=y
 # CONFIG_LOOP is not set
 # CONFIG_RAMDISK is not set
 # CONFIG_CAN is not set
+# CONFIG_ARCH_HAVE_PWM_PULSECOUNT is not set
 # CONFIG_PWM is not set
+# CONFIG_ARCH_HAVE_I2CRESET is not set
 # CONFIG_I2C is not set
 # CONFIG_SPI is not set
+# CONFIG_I2S is not set
 # CONFIG_RTC is not set
 # CONFIG_WATCHDOG is not set
 # CONFIG_ANALOG is not set
+# CONFIG_AUDIO_DEVICES is not set
 # CONFIG_BCH is not set
 # CONFIG_INPUT is not set
 # CONFIG_LCD is not set
 # CONFIG_MMCSD is not set
 CONFIG_MTD=y
+
+#
+# MTD Configuration
+#
 # CONFIG_MTD_PARTITION is not set
+# CONFIG_MTD_BYTE_WRITE is not set
+# CONFIG_MTD_CONFIG is not set
+# CONFIG_MTD_CONFIG_RAM_CONSOLIDATE is not set
+
+#
+# MTD Device Drivers
+#
+# CONFIG_MTD_NAND is not set
+# CONFIG_ARCH_NAND_HWECC is not set
 CONFIG_RAMMTD=y
 CONFIG_RAMMTD_BLOCKSIZE=512
 CONFIG_RAMMTD_ERASESIZE=4096
 CONFIG_RAMMTD_ERASESTATE=0xff
 CONFIG_RAMMTD_FLASHSIM=y
 # CONFIG_MTD_AT24XX is not set
+# CONFIG_MTD_AT25 is not set
 # CONFIG_MTD_AT45DB is not set
 # CONFIG_MTD_M25P is not set
+# CONFIG_MTD_SMART is not set
 # CONFIG_MTD_RAMTRON is not set
 # CONFIG_MTD_SST25 is not set
+# CONFIG_MTD_SST25XX is not set
 # CONFIG_MTD_SST39FV is not set
 # CONFIG_MTD_W25 is not set
 # CONFIG_PIPES is not set
@ -227,7 +232,13 @@ CONFIG_RAMMTD_FLASHSIM=y
 CONFIG_SERIAL=y
 # CONFIG_DEV_LOWCONSOLE is not set
 # CONFIG_16550_UART is not set
+
+#
+# USART Configuration
+#
 # CONFIG_STANDARD_SERIAL is not set
+# CONFIG_SERIAL_IFLOWCONTROL is not set
+# CONFIG_SERIAL_OFLOWCONTROL is not set
 # CONFIG_USBDEV is not set
 # CONFIG_USBHOST is not set
 # CONFIG_WIRELESS is not set
@ -244,6 +255,8 @@ CONFIG_SERIAL=y
 #
 # Networking Support
 #
+# CONFIG_ARCH_HAVE_NET is not set
+# CONFIG_ARCH_HAVE_PHY is not set
 # CONFIG_NET is not set

 #
@ -254,6 +267,8 @@ CONFIG_SERIAL=y
 # File system configuration
 #
 # CONFIG_DISABLE_MOUNTPOINT is not set
+CONFIG_FS_READABLE=y
+CONFIG_FS_WRITABLE=y
 # CONFIG_FS_RAMMAP is not set
 CONFIG_FS_FAT=y
 # CONFIG_FAT_LCNAMES is not set
@ -261,12 +276,16 @@ CONFIG_FS_FAT=y
 # CONFIG_FS_FATTIME is not set
 # CONFIG_FAT_DMAMEMORY is not set
 CONFIG_FS_NXFFS=y
+CONFIG_NXFFS_SCAN_VOLUME=y
+CONFIG_NXFFS_REFORMAT_THRESH=20
 CONFIG_NXFFS_PREALLOCATED=y
 CONFIG_NXFFS_ERASEDSTATE=0xff
 CONFIG_NXFFS_PACKTHRESHOLD=32
 CONFIG_NXFFS_MAXNAMLEN=255
 CONFIG_NXFFS_TAILTHRESHOLD=8192
 # CONFIG_FS_ROMFS is not set
+# CONFIG_FS_SMARTFS is not set
+# CONFIG_FS_PROCFS is not set

 #
 # System Logging
@ -287,6 +306,11 @@ CONFIG_NXFFS_TAILTHRESHOLD=8192
 CONFIG_MM_REGIONS=1
 # CONFIG_GRAN is not set

+#
+# Audio Support
+#
+# CONFIG_AUDIO is not set
+
 #
 # Binary Formats
 #
@ -331,6 +355,7 @@ CONFIG_LIB_SENDFILE_BUFSIZE=512
 # Non-standard Library Support
 #
 # CONFIG_LIB_KBDCODEC is not set
+# CONFIG_LIB_SLCDCODEC is not set

 #
 # Basic CXX Support
@ -351,7 +376,7 @@ CONFIG_LIB_SENDFILE_BUFSIZE=512
 #
 # CONFIG_EXAMPLES_BUTTONS is not set
 # CONFIG_EXAMPLES_CAN is not set
-# CONFIG_SYSTEM_COMPOSITE is not set
+# CONFIG_EXAMPLES_CONFIGDATA is not set
 # CONFIG_EXAMPLES_DHCPD is not set
 # CONFIG_EXAMPLES_ELF is not set
 # CONFIG_EXAMPLES_FTPC is not set
@ -366,7 +391,7 @@ CONFIG_LIB_SENDFILE_BUFSIZE=512
 # CONFIG_EXAMPLES_MM is not set
 # CONFIG_EXAMPLES_MODBUS is not set
 # CONFIG_EXAMPLES_MOUNT is not set
-# CONFIG_EXAMPLES_MTDPART is not set
+# CONFIG_EXAMPLES_NRF24L01TERM is not set
 # CONFIG_EXAMPLES_NSH is not set
 # CONFIG_EXAMPLES_NULL is not set
 # CONFIG_EXAMPLES_NX is not set
@ -396,6 +421,9 @@ CONFIG_EXAMPLES_NXFFS_NLOOPS=100
 # CONFIG_EXAMPLES_ROMFS is not set
 # CONFIG_EXAMPLES_SENDMAIL is not set
 # CONFIG_EXAMPLES_SERLOOP is not set
+# CONFIG_EXAMPLES_SLCD is not set
+# CONFIG_EXAMPLES_SMART is not set
+# CONFIG_EXAMPLES_TCPECHO is not set
 # CONFIG_EXAMPLES_TELNETD is not set
 # CONFIG_EXAMPLES_THTTPD is not set
 # CONFIG_EXAMPLES_TIFF is not set
@ -403,7 +431,6 @@ CONFIG_EXAMPLES_NXFFS_NLOOPS=100
 # CONFIG_EXAMPLES_UDP is not set
 # CONFIG_EXAMPLES_UIP is not set
 # CONFIG_EXAMPLES_USBSERIAL is not set
-# CONFIG_SYSTEM_USBMSC is not set
 # CONFIG_EXAMPLES_USBTERM is not set
 # CONFIG_EXAMPLES_WATCHDOG is not set

@ -453,10 +480,23 @@ CONFIG_EXAMPLES_NXFFS_NLOOPS=100
 # NxWidgets/NxWM
 #

+#
+# Platform-specific Support
+#
+# CONFIG_PLATFORM_CONFIGDATA is not set
+
 #
 # System NSH Add-Ons
 #

+#
+# USB CDC/ACM Device Commands
+#
+
+#
+# USB Composite Device Commands
+#
+
 #
 # Custom Free Memory Command
 #
@ -472,7 +512,16 @@ CONFIG_EXAMPLES_NXFFS_NLOOPS=100
 # CONFIG_SYSTEM_INSTALL is not set

 #
-# RAM Test
+# FLASH Erase-all Command
+#
+
+#
+# NxPlayer media player library / command Line
+#
+# CONFIG_SYSTEM_NXPLAYER is not set
+
+#
+# RAM test
 #
 # CONFIG_SYSTEM_RAMTEST is not set

@ -504,3 +553,16 @@ CONFIG_EXAMPLES_NXFFS_NLOOPS=100
 #
 # USB Monitor
 #
+
+#
+# Stack Monitor
+#
+
+#
+# USB Mass Storage Device Commands
+#
+
+#
+# Zmodem Commands
+#
+# CONFIG_SYSTEM_ZMODEM is not set