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, 91 insertions, 0 deletions

diff --git a/include/usb_tc_sm.h b/include/usb_tc_sm.h
new file mode 100644
index 0000000000..08e9ebbf54
--- /dev/null
+++ b/include/usb_tc_sm.h
@@ -0,0 +1,91 @@
+/* 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 Type-C module */
+
+#ifndef __CROS_EC_USB_TC_H
+#define __CROS_EC_USB_TC_H
+
+enum typec_state_id {
+	DISABLED,
+	UNATTACHED_SNK,
+	ATTACH_WAIT_SNK,
+	ATTACHED_SNK,
+#if !defined(CONFIG_USB_TYPEC_VPD)
+	ERROR_RECOVERY,
+	UNATTACHED_SRC,
+	ATTACH_WAIT_SRC,
+	ATTACHED_SRC,
+#endif
+#if !defined(CONFIG_USB_TYPEC_CTVPD) && !defined(CONFIG_USB_TYPEC_VPD)
+	AUDIO_ACCESSORY,
+	ORIENTED_DEBUG_ACCESSORY_SRC,
+	UNORIENTED_DEBUG_ACCESSORY_SRC,
+	DEBUG_ACCESSORY_SNK,
+	TRY_SRC,
+	TRY_WAIT_SNK,
+	CTUNATTACHED_SNK,
+	CTATTACHED_SNK,
+#endif
+#if defined(CONFIG_USB_TYPEC_CTVPD)
+	CTTRY_SNK,
+	CTATTACHED_UNSUPPORTED,
+	CTATTACH_WAIT_UNSUPPORTED,
+	CTUNATTACHED_UNSUPPORTED,
+	CTUNATTACHED_VPD,
+	CTATTACH_WAIT_VPD,
+	CTATTACHED_VPD,
+	CTDISABLED_VPD,
+	TRY_SNK,
+	TRY_WAIT_SRC,
+#endif
+	/* Number of states. Not an actual state. */
+	TC_STATE_COUNT,
+};
+
+/**
+ * Get the id of the current Type-C state
+ *
+ * @param port USB-C port number
+ */
+enum typec_state_id get_typec_state_id(int port);
+
+/**
+ * Get current data role
+ *
+ * @param port USB-C port number
+ * @return 0 for ufp, 1 for dfp, 2 for disconnected
+ */
+int tc_get_data_role(int port);
+
+/**
+ * Get current power role
+ *
+ * @param port USB-C port number
+ * @return 0 for sink, 1 for source or vpd
+ */
+int tc_get_power_role(int port);
+
+/**
+ * Set loop timeout value
+ *
+ * @param port USB-C port number
+ * @timeout time in ms
+ */
+void tc_set_timeout(int port, uint64_t timeout);
+
+#ifdef CONFIG_USB_TYPEC_CTVPD
+/**
+ * Resets the charge-through support timer. This can be
+ * called many times but the support timer will only
+ * reset once, while in the Attached.SNK state.
+ *
+ * @param port USB-C port number
+ */
+void tc_reset_support_timer(int port);
+
+#endif /* CONFIG_USB_TYPEC_CTVPD */
+#endif /* __CROS_EC_USB_TC_H */
+