emmc field firmware update
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原文:http://www.lai18.com/content/7875114.html
问题:
hynix emmc H9TQ17ABJTMCUR固件需要从V3升级到V7,以解决低概死机重启问题
FFU方案思路:
LK阶段EMMC host & card初始化后,进入emmc FFU mode升级V7固件。由于firmware
大小为512KB,而LK pattition只有384KB,所以firmware文件不能直接compile到LK,
而需要将firmware bin打包到logo partition。LK升级前,从logo从解包获取firmware bin。
FFU概念:
Using this mechanism the host downloads a new version of the firmware to the e-MMC device and, following a successful download, instructs the e-MMC device to install the new downloaded firmware into the device.
FFU Flow:
相关代码:
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