Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32f2/STM32F215/OTG_HS_GLOBAL/OTG_HS_GRSTCTL#0x0
OTG_HS reset register
Core soft reset
HCLK soft reset
Host frame counter reset
RxFIFO flush
TxFIFO flush
TxFIFO number
DMA request signal
AHB master idle
https://github.com/modm-io/cmsis-svd-stm32