Quote:
Originally Posted by TCCPhreak
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I'm at that point currently, myself: None of the kernels load and even fastboot (which normally is safe as hell) doesn't work.
This is also a situation in which the serial port could allow you to recover the system in ways impossible using other means.
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The fastboot mode is supported by bist (built-in self-test) u-boot (bootloader firmware). If you damage or erase bist u-boot in the mmc flash device, you cannot go into fastboot mode by normal methods (MfgTool or diags menu).
It would be possible to build a custom u-boot image and MfgTool profile, but the larger bist u-boot requires a multi-stage load profile, because it will not fit into the small RAM memory in the iMX50 SoC (system on chip).
Currently, the only "easy" way to flash the mmc in the case of no diags or fastboot, is by using the serial port and loading a firmware image using YMODEM serial protocol.
I hope *somebody* will provide us a working MfgTool profile and images to get into fastboot mode and/or directly flash an image to a completely erased mmc flash chip. Perhaps someday I will have time to study that again...