Owners manual

Interfaces
H3 Datasheet(Revision1.2) Copyright© 2015 Allwinner Technology Co.,Ltd.All Rights Reserved. Page 492
structure for an entire frame.
3
R
0
Reserved
These bits are reserved and should be set to zero.
2
R
Asynchronous Schedule Park Capability
If this bit is set to a one, then the host controller supports the park feature
for high-speed queue heads in the Asynchronous Schedule. The feature can
be disabled or enabled and set to a specific level by using the Asynchronous
Schedule Park Mode Enable and Asynchronous Schedule Park Mode Count
fields in the USBCMD register.
1
R
Programmable Frame List Flag
If this bit is set to a zero, then system software must use a frame list length
of 1024 elements with this host controller.The USBCMD register
Frame List Size field is a read-only register and should be set to zero.
If set to 1,then system software can specify and use the frame list in the
USBCMD register Frame List Size field to cofigure the host controller.
The frame list must always aligned on a 4K page boundary.This requirement
ensures that the frame list is always physically contiguous.
0
R
0
Reserved
These bits are reserved for future use and should return a value of zero
when read.
8.5.2.5.5. EHCI Companion Port Route Description (Default Value: UNDEFINED)
Offset: 0x000C
Register Name: HCSP-PORTROUTE
Bit
R/W
Default/Hex
Description
31:0
R
HCSP-PORTROUTE
This optional field is valid only if Port Routing Rules field in HCSPARAMS
register is set to a one.
This field is used to allow a host controller implementation to explicitly
describe to which companion host controller each implemented port is
mapped. This field is a 15-element nibble array (each 4 bit is one array
element). Each array location corresponds one-to-one with a physical port
provided by the host controller (e.g. PORTROUTE [0] corresponds to the first
PORTSC port, PORTROUTE [1] to the second PORTSC port, etc.). The value of
each element indicates to which of the companion host controllers this port
is routed. Only the first N_PORTS elements have valid information. A value
of zero indicates that the port is routed to the lowest numbered function
companion host controller. A value of one indicates that the port is routed
to the next lowest numbered function companion host controller, and so on.
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