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Sequences

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This topic describes NFC CX driver sequences.

Sequence Description
SequencePreInit Invoked by CX during the idle to init state transition (that is, prior to start of initialization by NFC CX). No NCI commands including CORE_RESET_CMD has been sent to the NFC controller by NFC CX. In this sequence, the client can invoke any non-NCI command. NCI commands shouldn't be sent to the controller since neither CORE_RESET_CMD nor CORE_INIT_CMD has been sent to the controller.
SequenceInitComplete Invoked by CX immediately after the completion of initialization of NFC CX which includes NCI reset, NCI initialization and configuration of the NFC controller.
SequencePreRfDiscStart Invoked by CX prior to start of RF discovery i.e. through RF_DISCOVER_CMD. The client driver can use this opportunity to perform any related RF configuration including any optimizations to the discovery loop.
SequenceRfDiscStartComplete Invoked by CX immediately after the start of RF discovery. Any configuration post-discovery start can be supported through this extensibility point.
SequencePreRfDiscStop Invoked by CX prior to stopping the RF discovery loop.
SequenceRfDiscStopComplete Invoked immediately after discovery loop is stopped. The client driver can use this extensibility point to enable any standby mode configuration.
SequencePreNfceeDisc Invoked by CX prior to start of NFCEE discovery. The NFCEE discovery happens with the discovery loop deactivated. The client driver can use this sequence to enable any internal NFC-NFCEE interfaces which could have been disabled post-initialization for power optimizations.
SequenceNfceeDiscComplete Invoked immediately post-NFCEE discovery operation.
SequencePreShutdown Invoked prior to start of shutdown.
SequenceShutdownComplete Invoked by CX after shutdown sequence is complete. The client driver can clean up any NCI state maintained.
SequencePreRecovery Invoked by CX if it needs to perform a recovery sequence due to a fatal failure. The client driver can use this sequence to capture RAM dumps for diagnostic purposes.
SequenceRecoveryComplete Invoked by the CX after the completion of the recovery sequence and when the driver is back to the work-state