Toshiba TLCS-900/H1 Series Manual page 244

(3) Vendor request (Class request)
UDC does not support "Automatic answer" of Vendor requests.
According to INT_SETUP interrupt, access the register in which the device
request is stored, and identify the request. If this request is a Vendor request,
control the UDC externally, and process the Vendor request.
Below is an explanation for the case where data phase is transmitting (Control
read), and for the case where data phase is receiving (Control write).
(a) Control request
bmRequestType bRequest
110000xxB Vendor specific
When
bmRequestType, bRequest, wValue, wIndex and wLength registers and
process each request. According to application, access Setup_Received register
after request has been identified. UDC must also be informed that
INT_SETUP interrupt has been recognized.
After transmitting data prepared in application, access DATASET register,
and confirm EP0_DSET_A bit is "0". After confirming, write data FIFO of
endpoint 0. If transmitting data is more than payload, write data after it
confirming whether EP0_DSET_A bit in DATASET register is "0".
(INT_ENDPOINT0 interrupt can be used.) If writing all data is finished, write
"0" to EP0 bit of EOP register. When UDC receives this, the status stage
finishes automatically.
INT_STATUS interrupt is asserted when UDC finishes status stage
normally. If finishing status stage normally is recognized by external
application, manage this stage by using this interrupt signal. If status stage
cannot be finished normally and during status stage, a new SETUP token may
be received. In this case, when INT_SETUP interrupt signal is asserted, "1" is
set to STAGE_ERROR bit of EP0_STATUS register informing externally that
the status stage cannot be finished normally.
The dataphase may have finished on a data number that is shorter than
the value showed to wLength by protocol of control read transfer type in USB.
If the application program is configured using only the wLength value,
processing cannot be carried out when the host shifts status stage without
arriving at the expected data number. At this point, shifting to status stage
can be confirmed by using INT_STATUSNAK interrupt signal. (However,
releasing mask of STATUS_NAK bit by using interrupt control register is
needed.) In Vendor Request, this problem will not occur because the receiving
buffer size is set to host controller by driver. (In every host, data (data that is
transmitted from device by payload of 8 bytes) may be taken to be short packet
until confirmation of payload size on device side. Therefore, exercise care if
controlling standard requests by software.)
wValue
Vendor specific Vendor specific
INT_SETUP is received,
92CH21-242
wIndex wLength
Vendor specific
(Expire 0)
identify contents
TMP92CH21
Data
Vendor data
of request by
2009-06-19