usb: chipidea: s32g: Add usb support for s32g2

Enable USB driver for s32g2.  This chip has an errata ERR050474[1]
so we need to set S32G_UCMALLBE to avoid some memory corruption.  I
have include the description below:

ERR050474: USB : USB data may be corrupted if transaction size is
non-multiple of 32bits

Description
When USB issues narrow length transfers i.e. AHB transaction size is less
than 4bytes, data for that transaction will get corrupted. Narrow length
transactions can occur if the transaction size is non-multiple of four
bytes, error scenarios terminate the transactions early or if the address
offset programmed in QTD is 4 Byte unaligned.  This happens because the
SoC NOC is not able to handle the byte strobes generated by USB controller
and is dependent on its internally generates byte strobes.

Workaround
Narrow transfers work properly on bypassing USB controller’s byte
generation logic. This can be done by setting UCMALLBE (bit 15, USB Core
Master All Byte Enable) bit of UOTGNC_CR.

Link: https://www.nxp.com/webapp/Download?colCode=S32G2_1P77B
Signed-off-by: Ghennadi Procopciuc <ghennadi.procopciuc@nxp.com>
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/abb2ed5d-f01a-48f6-b1ae-6f8f39ae40fa@sabinyo.mountain
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions