Texas Instruments OMAP5912 Reference Manual page 1443

USB Device Controller
3.14 Endpoint 0 RX Interrupt Handler
Figure 18 shows the endpoint 0 RX portion of the general USB interrupt
handler, which must handle general USB interrupts related to control OUT
transactions on endpoint 0. No EP0 interrupt is generated for autodecoded
control transfers.
SPRU761A Universal Serial Bus (USB) 151