chocodile_vpdmcu: Firmware for chocodile mcu

Implement Chocodile Charge-Through Vconn Powered firmware for mcu
using new Type-C/PD State machine stack.

BUG=b:115626873
BRANCH=none
TEST=manual
  Charge-Through was tested on an Atlas running a DRP USB-C/PD state
  machine with CTUnattached.SNK and CTAttached.SNK states.

Signed-off-by: Sam Hurst <shurst@chromium.org>
Change-Id: I847f1bcd2fc3ce41e66edd133a10c943d5e8c819
Reviewed-on: https://chromium-review.googlesource.com/1225250
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Sam Hurst <shurst@google.com>
Reviewed-by: Stefan Reinauer <reinauer@google.com>

1 files changed, 79 insertions, 0 deletions

diff --git a/include/usb_pe_sm.h b/include/usb_pe_sm.h
new file mode 100644
index 0000000000..a8fd59b08c
--- /dev/null
+++ b/include/usb_pe_sm.h
@@ -0,0 +1,79 @@
+/* Copyright 2019 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* USB Policy Engine module */
+
+#ifndef __CROS_EC_USB_PE_H
+#define __CROS_EC_USB_PE_H
+
+enum pe_error {
+	ERR_RCH_CHUNKED,
+	ERR_RCH_MSG_REC,
+	ERR_TCH_CHUNKED,
+	ERR_TCH_XMIT,
+};
+
+/**
+ * Initialize the Policy Engine State Machine
+ *
+ * @param port USB-C port number
+ */
+void pe_init(int port);
+
+/**
+ * Runs the Policy Engine State Machine
+ *
+ * @param port USB-C port number
+ * @param evt  system event, ie: PD_EVENT_RX
+ * @param en   0 to disable the machine, 1 to enable the machine
+ */
+void policy_engine(int port, int evt, int en);
+
+/**
+ * Informs the Policy Engine that a message was successfully sent
+ *
+ * @param port USB-C port number
+ */
+void pe_message_sent(int port);
+
+/**
+ * Informs the Policy Engine of an error.
+ *
+ * @param port USB-C port number
+ * @parm  e    error
+ */
+void pe_report_error(int port, enum pe_error e);
+
+/**
+ * Informs the Policy Engine that a message has been received
+ *
+ * @param port USB-C port number
+ * @parm  e    error
+ */
+void pe_pass_up_message(int port);
+
+/**
+ * Informs the Policy Engine that a hard reset was received.
+ *
+ * @param port USB-C port number
+ */
+void pe_got_hard_reset(int port);
+
+/**
+ * Informs the Policy Engine that a soft reset was received.
+ *
+ * @param port USB-C port number
+ */
+void pe_got_soft_reset(int port);
+
+/**
+ * Informs the Policy Engine that a hard reset was sent.
+ *
+ * @param port USB-C port number
+ */
+void pe_hard_reset_sent(int port);
+
+#endif /* __CROS_EC_USB_PE_H */
+