nRF54H20 USB cherry-picks for 2.9.0-nRF54H20-2 #2775
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Control transfers can be abruptly terminated by host. The most common use case when new SETUP token is received before the previous transfer ends, is when the host timeouts on previous control transfer. Fix the SETUP data leak by releasing stored setup buffer if new transfer is started out of sequence. Upstream PR #: 86925 Signed-off-by: Tomasz Moń <[email protected]>
DWC2 core sets DIEPCTL0 SNAK when SETUP packet is received. The CNAK bit results in device sending NAK in response to IN token sent to EP0, but it does not modify the TxFIFO in any way. The stale data in TxFIFO can then lead to "FIFO space is too low" error. Solve the issue by disabling and flushing IN endpoint 0 if previous control transfer did not finish. Upstream PR #: 88642 Signed-off-by: Tomasz Moń <[email protected]>
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carlescufi
approved these changes
Apr 16, 2025
carlescufi
merged commit eceea6b
into
nrfconnect:v3.7.99-ncs3-branch
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PR88642 is backported to apply on 2.9.0-nRF54H20 sdk-zephyr without requiring to pull in other changes.