Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Atmel/AT91SAM9G25/HSMCI0/CFG#0x0
Configuration Register
HSMCI Internal FIFO control mode
Flow Error flag reset control mode
High Speed Mode
Synchronize on the last block
https://github.com/cmsis-svd/cmsis-svd-data