net: tftpput: Rename TFTP to TFTPGET

[oweals/u-boot.git] / doc / README.nand

diff --git a/doc/README.nand b/doc/README.nand
index bb722892de809f1ffa85f0424f1477b738f9b856..023740e1d364452f77316cf97968be48faf9cd40 100644 (file)
--- a/doc/README.nand
+++ b/doc/README.nand
@@ -78,12 +78,31 @@ Commands:
       should work well, but loading an image copied from another flash is
       going to be trouble if there are any bad blocks.
 
+   nand write.trimffs addr ofs|partition size
+      Enabled by the CONFIG_CMD_NAND_TRIMFFS macro. This command will write to
+      the NAND flash in a manner identical to the 'nand write' command
+      described above -- with the additional check that all pages at the end
+      of eraseblocks which contain only 0xff data will not be written to the
+      NAND flash. This behaviour is required when flashing UBI images
+      containing UBIFS volumes as per the UBI FAQ[1].
+
+      [1] http://www.linux-mtd.infradead.org/doc/ubi.html#L_flasher_algo
+
    nand write.oob addr ofs|partition size
       Write `size' bytes from `addr' to the out-of-band data area
       corresponding to `ofs' in NAND flash. This is limited to the 16 bytes
       of data for one 512-byte page or 2 256-byte pages. There is no check
       for bad blocks.
 
+   nand read.raw addr ofs|partition
+      Read page from `ofs' in NAND flash to `addr'. This reads the raw page,
+      so ECC is avoided and the OOB area is read as well.
+
+   nand write.raw addr ofs|partition
+      Write page from `addr' to `ofs' in NAND flash. This writes the raw page,
+      so ECC is avoided and the OOB area is written as well, making the whole
+      page written as-is.
+
 Configuration Options:
 
    CONFIG_CMD_NAND
@@ -101,21 +120,11 @@ Configuration Options:
    CONFIG_SYS_NAND_MAX_CHIPS
       The maximum number of NAND chips per device to be supported.
 
-   CONFIG_SYS_DAVINCI_BROKEN_ECC
-      Versions of U-Boot <= 1.3.3 and Montavista Linux kernels
-      generated bogus ECCs on large-page NAND. Both large and small page
-      NAND ECCs were incompatible with the Linux davinci git tree (since
-      NAND was integrated in 2.6.24).
-      Turn this ON if you want backwards compatibility.
-      Turn this OFF if you want U-Boot and the Linux davinci git kernel
-      to use the same ECC format.
-
 NOTE:
 =====
 
 The current NAND implementation is based on what is in recent
-Linux kernels.  The old legacy implementation has been disabled,
-and will be removed soon.
+Linux kernels.  The old legacy implementation has been removed.
 
 If you have board code which used CONFIG_NAND_LEGACY, you'll need
 to convert to the current NAND interface for it to continue to work.