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authorPantelis Antoniou <panto@antoniou-consulting.com>2013-03-14 05:32:48 +0000
committerMarek Vasut <marex@denx.de>2013-04-10 13:42:05 +0200
commitea2453d56b8860dbd18a3c517531ffc8dcb5c839 (patch)
tree86b1dfe3a0e0a9f70f2edec54c66628229234948 /README
parentb3ba6e94b8298422aa98961fdd30890f3dd83cc5 (diff)
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dfu: Support larger than memory transfers.
Previously we didn't support upload/download larger than available memory. This is pretty bad when you have to update your root filesystem for example. This patch removes that limitation (and the crashes when you transfered any file larger than 4MB) by making raw image writes be done in chunks and making file maximum size be configurable. The sequence number is a 16 bit counter; make sure we handle rollover correctly. This fixes the wrong transfers for large (> 256MB) images. Also utilize a variable to handle initialization, so that we don't rely on just the counter sent by the host. Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com> Signed-off-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'README')
-rw-r--r--README7
1 files changed, 7 insertions, 0 deletions
diff --git a/README b/README
index f7f41bc..7879eef 100644
--- a/README
+++ b/README
@@ -1357,6 +1357,13 @@ The following options need to be configured:
CONFIG_DFU_MMC
This enables support for exposing (e)MMC devices via DFU.
+ CONFIG_SYS_DFU_MAX_FILE_SIZE
+ When updating files rather than the raw storage device,
+ we use a static buffer to copy the file into and then write
+ the buffer once we've been given the whole file. Define
+ this to the maximum filesize (in bytes) for the buffer.
+ Default is 4 MiB if undefined.
+
- Journaling Flash filesystem support:
CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE,
CONFIG_JFFS2_NAND_DEV