usb_pe_drp: new unit test with mocks

Add a new unit test for usb_pe_drp with mocks for the various
subsystems that it will use.
The fake_prl module is already essentially a mock for the PRL layer,
so just move it into the mocks directory and make it available as
mock to other tests.

BUG=b:163421994
BRANCH=None
TEST=`make runhosttests` succeeds

Signed-off-by: Paul Fagerburg <pfagerburg@google.com>
Change-Id: I2aea3fa0694e8d9e6bae1f47516cb4d5d2a1e714
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2364050
Tested-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Jett Rink <jettrink@chromium.org>
Commit-Queue: Paul Fagerburg <pfagerburg@chromium.org>

1 files changed, 41 insertions, 0 deletions

diff --git a/common/mock/usb_pd_dpm_mock.c b/common/mock/usb_pd_dpm_mock.c
new file mode 100644
index 0000000000..18778c36f4
--- /dev/null
+++ b/common/mock/usb_pd_dpm_mock.c
@@ -0,0 +1,41 @@
+/* Copyright 2020 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.
+ */
+
+/*
+ * Mock of Device Policy Manager implementation
+ * Refer to USB PD 3.0 spec, version 2.0, sections 8.2 and 8.3
+ */
+
+#include "usb_pd.h"
+#include "mock/usb_pd_dpm_mock.h"
+#include "memory.h"
+
+struct mock_dpm_port_t dpm[CONFIG_USB_PD_PORT_MAX_COUNT];
+
+void mock_dpm_reset(void)
+{
+	/* Reset all values to 0. */
+	memset(dpm, 0, sizeof(dpm));
+}
+
+void dpm_init(int port)
+{
+	dpm[port].mode_entry_done = false;
+	dpm[port].mode_exit_request = false;
+}
+
+void dpm_vdm_acked(int port, enum tcpm_transmit_type type, int vdo_count,
+		uint32_t *vdm)
+{
+}
+
+void dpm_vdm_naked(int port, enum tcpm_transmit_type type, uint16_t svid,
+		uint8_t vdm_cmd)
+{
+}
+
+void dpm_run(int port)
+{
+}