tcpmv2: retool start/end AMS

- Drop start and end ams function in favor of a flag based approach
- Don't clear RX queue on TX reset. We are supposed to drop any pending
TX messages (not RX messages). This should also help us to process
partner messages if we get a collision
- Drop prl_tx_phy_layer_reset_run and call next state directly in entry
- Dropping retry_counter reset to 0 since that happens in entry method
- Dropping flags reset to 0 because it is most likely dropping more
flags than we want.

BRANCH=none
BUG=b:158248741,b:157228506,b:157661566
TEST=DUT accepts soft resets

Change-Id: Ice8721a6c81452584f8d4ec474cb4f4a487b713b
Signed-off-by: Jett Rink <jettrink@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2233794
Tested-by: Diana Z <dzigterman@chromium.org>
Tested-by: Denis Brockus <dbrockus@chromium.org>
Reviewed-by: Diana Z <dzigterman@chromium.org>
Reviewed-by: Denis Brockus <dbrockus@chromium.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/include/usb_pe_sm.h b/include/usb_pe_sm.h
index 90069f6cf6..e69eff572f 100644
--- a/include/usb_pe_sm.h
+++ b/include/usb_pe_sm.h
@@ -178,5 +178,16 @@ void pe_set_sysjump(void);
  * @param port USB-C port number
  */
 void pe_invalidate_explicit_contract(int port);
+
+/*
+ * Return true if the PE is is within an atomic
+ * messaging sequence that it initiated with a SOP* port partner.
+ *
+ * Note the PRL layer polls this instead of using AMS_START and AMS_END
+ * notification from the PE that is called out by the spec
+ *
+ * @param port USB-C port number
+ */
+bool pe_in_local_ams(int port);
 #endif /* __CROS_EC_USB_PE_H */