Protect FIFO writes against other USB register accesses.
According to "DesignWare Cores USB 1.1/2.0 Device Subsystem-AHB/VCI Databook":
"During FIFO access, the application must not access the UDC/Subsystem
registers or vendor registers (for ULPI mode). After starting to access a
FIFO, the application must complete the transaction before accessing the
register."
Change-Id: I2aed833acaa2970310b6fd48f41a95bee2182ec1
Signed-off-by: Adrian Bradianu <adrian.bradianu@windriver.com>
Quark SE USB device (Designware IP) controller driver implements
the low level control routines to deal directly with the hardware.
Only FIFO mode supported.
Change-Id: I086186df017734579f0363ed79effc1481ff32c2
Signed-off-by: Adrian Bradianu <adrian.bradianu@windriver.com>
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Signed-off-by: Jithu Joseph <jithu.joseph@intel.com>
Adrian Bradianu