TCPMv2: Unit Test TD.PD.LL.E3 Soft Reset Usage

BUG=b:175144677
BRANCH=none
TEST=make run-usb_tcpmv2_compliance

Signed-off-by: Denis Brockus <dbrockus@google.com>
Change-Id: I629e2811b2cba5aa9821d8c855e039a6cfaa32ce
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2595816
Tested-by: Denis Brockus <dbrockus@chromium.org>
Auto-Submit: Denis Brockus <dbrockus@chromium.org>
Reviewed-by: Edward Hill <ecgh@chromium.org>
Commit-Queue: Denis Brockus <dbrockus@chromium.org>

8 files changed, 604 insertions, 0 deletions

diff --git a/test/build.mk b/test/build.mk
index fa0e3500cf..0684f995d1 100644
--- a/test/build.mk
+++ b/test/build.mk
@@ -93,6 +93,7 @@ test-list-host += usb_typec_ctvpd
 test-list-host += usb_typec_drp_acc_trysrc
 test-list-host += usb_prl_old
 test-list-host += usb_tcpmv2_tcpci
+test-list-host += usb_tcpmv2_compliance
 test-list-host += usb_prl
 test-list-host += usb_prl_noextended
 test-list-host += usb_pe_drp_old
@@ -217,6 +218,8 @@ usb_pe_drp_old_noextended-y=usb_pe_drp_old.o usb_sm_checks.o fake_usbc.o
 usb_pe_drp-y=usb_pe_drp.o usb_sm_checks.o
 usb_pe_drp_noextended-y=usb_pe_drp_noextended.o usb_sm_checks.o
 usb_tcpmv2_tcpci-y=usb_tcpmv2_tcpci.o vpd_api.o usb_sm_checks.o
+usb_tcpmv2_compliance-y=usb_tcpmv2_compliance.o vpd_api.o usb_sm_checks.o \
+	usb_tcpmv2_compliance_common.o usb_tcpmv2_td_pd_ll_e3.o
 utils-y=utils.o
 utils_str-y=utils_str.o
 vboot-y=vboot.o
diff --git a/test/test_config.h b/test/test_config.h
index 00dbcab5c9..fec9fd7084 100644
--- a/test/test_config.h
+++ b/test/test_config.h
@@ -501,6 +501,33 @@ int ncp15wb_calculate_temp(uint16_t adc);
 #define CONFIG_USB_PD_DECODE_SOP
 #endif
 
+#ifdef TEST_USB_TCPMV2_COMPLIANCE
+#define CONFIG_USB_DRP_ACC_TRYSRC
+#define CONFIG_USB_PD_DUAL_ROLE
+#define CONFIG_USB_PD_DUAL_ROLE_AUTO_TOGGLE
+#define CONFIG_USB_PD_REV30
+#define CONFIG_USB_PD_TCPC_LOW_POWER
+#define CONFIG_USB_PD_TRY_SRC
+#define CONFIG_USB_PD_TCPMV2
+#define CONFIG_USB_PD_PORT_MAX_COUNT 1
+#define CONFIG_USBC_SS_MUX
+#define CONFIG_USB_PD_VBUS_DETECT_TCPC
+#define CONFIG_USB_POWER_DELIVERY
+#define CONFIG_TEST_USB_PE_SM
+#define CONFIG_USB_PD_ALT_MODE_DFP
+#define CONFIG_USBC_VCONN
+#define CONFIG_USBC_VCONN_SWAP
+#define CONFIG_USB_PID 0x5036
+#define PD_VCONN_SWAP_DELAY 5000 /* us */
+#define CONFIG_USB_PD_TCPM_TCPCI
+#define CONFIG_I2C
+#define CONFIG_I2C_CONTROLLER
+#define I2C_PORT_HOST_TCPC 0
+#define CONFIG_USB_PD_DEBUG_LEVEL 3
+#define CONFIG_USB_PD_EXTENDED_MESSAGES
+#define CONFIG_USB_PD_DECODE_SOP
+#endif
+
 #ifdef TEST_USB_PD_INT
 #define CONFIG_USB_POWER_DELIVERY
 #define CONFIG_USB_PD_TCPMV1
diff --git a/test/usb_tcpmv2_compliance.c b/test/usb_tcpmv2_compliance.c
new file mode 100644
index 0000000000..2ca08308ca
--- /dev/null
+++ b/test/usb_tcpmv2_compliance.c
@@ -0,0 +1,34 @@
+/* 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.
+ */
+
+#include "mock/tcpci_i2c_mock.h"
+#include "mock/usb_mux_mock.h"
+#include "task.h"
+#include "test_util.h"
+#include "timer.h"
+#include "usb_tcpmv2_compliance.h"
+
+void before_test(void)
+{
+	partner_tx_id = 0;
+	partner_set_pd_rev(PD_REV30);
+
+	mock_usb_mux_reset();
+	mock_tcpci_reset();
+
+	/* Restart the PD task and let it settle */
+	task_set_event(TASK_ID_PD_C0, TASK_EVENT_RESET_DONE);
+	task_wait_event(SECOND);
+}
+
+void run_test(int argc, char **argv)
+{
+	test_reset();
+
+	RUN_TEST(test_td_pd_ll_e3_dfp);
+	RUN_TEST(test_td_pd_ll_e3_ufp);
+
+	test_print_result();
+}
diff --git a/test/usb_tcpmv2_compliance.h b/test/usb_tcpmv2_compliance.h
new file mode 100644
index 0000000000..fb869a509c
--- /dev/null
+++ b/test/usb_tcpmv2_compliance.h
@@ -0,0 +1,68 @@
+/* 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.
+ */
+
+#ifndef USB_TCPMV2_COMPLIANCE_H
+#define USB_TCPMV2_COMPLIANCE_H
+
+#define PORT0 0
+
+enum mock_cc_state {
+	MOCK_CC_SRC_OPEN = 0,
+	MOCK_CC_SNK_OPEN = 0,
+	MOCK_CC_SRC_RA = 1,
+	MOCK_CC_SNK_RP_DEF = 1,
+	MOCK_CC_SRC_RD = 2,
+	MOCK_CC_SNK_RP_1_5 = 2,
+	MOCK_CC_SNK_RP_3_0 = 3,
+};
+enum mock_connect_result {
+	MOCK_CC_DUT_IS_SRC = 0,
+	MOCK_CC_DUT_IS_SNK = 1,
+};
+
+
+extern int partner_tx_id;
+
+extern uint32_t rdo;
+extern uint32_t pdo;
+
+extern const struct tcpc_config_t tcpc_config[];
+extern const struct usb_mux usb_muxes[];
+
+
+void mock_set_cc(enum mock_connect_result cr,
+	enum mock_cc_state cc1, enum mock_cc_state cc2);
+void mock_set_role(int drp, enum tcpc_rp_value rp,
+	enum tcpc_cc_pull cc1, enum tcpc_cc_pull cc2);
+void mock_set_alert(int alert);
+uint16_t tcpc_get_alert_status(void);
+bool vboot_allow_usb_pd(void);
+int pd_check_vconn_swap(int port);
+void board_reset_pd_mcu(void);
+
+
+int tcpci_startup(void);
+
+void partner_set_data_role(enum pd_data_role data_role);
+enum pd_data_role partner_get_data_role(void);
+
+void partner_set_power_role(enum pd_power_role power_role);
+enum pd_power_role partner_get_power_role(void);
+
+void partner_set_pd_rev(enum pd_rev_type pd_rev);
+enum pd_rev_type partner_get_pd_rev(void);
+
+void partner_send_msg(enum pd_msg_type sop,
+		      uint16_t type,
+		      uint16_t cnt,
+		      uint16_t ext,
+		      uint32_t *payload);
+
+int proc_pd_e1(enum pd_data_role data_role);
+
+int test_td_pd_ll_e3_dfp(void);
+int test_td_pd_ll_e3_ufp(void);
+
+#endif /* USB_TCPMV2_COMPLIANCE_H */
diff --git a/test/usb_tcpmv2_compliance.mocklist b/test/usb_tcpmv2_compliance.mocklist
new file mode 100644
index 0000000000..58a3541412
--- /dev/null
+++ b/test/usb_tcpmv2_compliance.mocklist
@@ -0,0 +1,8 @@
+/* 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.
+ */
+
+ #define CONFIG_TEST_MOCK_LIST  \
+	MOCK(USB_MUX)           \
+	MOCK(TCPCI_I2C)
diff --git a/test/usb_tcpmv2_compliance.tasklist b/test/usb_tcpmv2_compliance.tasklist
new file mode 100644
index 0000000000..654e4eca2b
--- /dev/null
+++ b/test/usb_tcpmv2_compliance.tasklist
@@ -0,0 +1,11 @@
+/* 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.
+ */
+
+/**
+ * See CONFIG_TEST_TASK_LIST in config.h for details.
+ */
+#define CONFIG_TEST_TASK_LIST \
+	TASK_TEST(PD_C0, pd_task, NULL, LARGER_TASK_STACK_SIZE) \
+	TASK_TEST(PD_INT_C0, pd_interrupt_handler_task, 0, LARGER_TASK_STACK_SIZE)
diff --git a/test/usb_tcpmv2_compliance_common.c b/test/usb_tcpmv2_compliance_common.c
new file mode 100644
index 0000000000..2c3d6e0546
--- /dev/null
+++ b/test/usb_tcpmv2_compliance_common.c
@@ -0,0 +1,289 @@
+/* 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.
+ */
+
+#include "hooks.h"
+#include "mock/tcpci_i2c_mock.h"
+#include "mock/usb_mux_mock.h"
+#include "task.h"
+#include "tcpci.h"
+#include "test_util.h"
+#include "timer.h"
+#include "usb_tcpmv2_compliance.h"
+
+int partner_tx_id;
+
+uint32_t rdo = RDO_FIXED(1, 500, 500, 0);
+uint32_t pdo = PDO_FIXED(5000, 3000,
+			 PDO_FIXED_DUAL_ROLE |
+			 PDO_FIXED_DATA_SWAP |
+			 PDO_FIXED_COMM_CAP);
+
+const struct tcpc_config_t tcpc_config[CONFIG_USB_PD_PORT_MAX_COUNT] = {
+	{
+		.bus_type = EC_BUS_TYPE_I2C,
+		.i2c_info = {
+			.port = I2C_PORT_HOST_TCPC,
+			.addr_flags = MOCK_TCPCI_I2C_ADDR_FLAGS,
+		},
+		.drv = &tcpci_tcpm_drv,
+		.flags = TCPC_FLAGS_TCPCI_REV2_0,
+	},
+};
+
+const struct usb_mux usb_muxes[CONFIG_USB_PD_PORT_MAX_COUNT] = {
+	{
+		.driver = &mock_usb_mux_driver,
+	}
+};
+
+
+void mock_set_cc(enum mock_connect_result cr,
+	enum mock_cc_state cc1, enum mock_cc_state cc2)
+{
+	mock_tcpci_set_reg(TCPC_REG_CC_STATUS,
+		TCPC_REG_CC_STATUS_SET(cr, cc1, cc2));
+}
+
+void mock_set_role(int drp, enum tcpc_rp_value rp,
+	enum tcpc_cc_pull cc1, enum tcpc_cc_pull cc2)
+{
+	mock_tcpci_set_reg(TCPC_REG_ROLE_CTRL,
+		TCPC_REG_ROLE_CTRL_SET(drp, rp, cc1, cc2));
+}
+
+static int mock_alert_count;
+void mock_set_alert(int alert)
+{
+	mock_tcpci_set_reg_bits(TCPC_REG_ALERT, alert);
+	mock_alert_count = 1;
+	schedule_deferred_pd_interrupt(PORT0);
+}
+
+uint16_t tcpc_get_alert_status(void)
+{
+	ccprints("mock_alert_count %d", mock_alert_count);
+	if (mock_alert_count > 0) {
+		mock_alert_count--;
+		return PD_STATUS_TCPC_ALERT_0;
+	}
+	return 0;
+}
+
+bool vboot_allow_usb_pd(void)
+{
+	return 1;
+}
+
+int pd_check_vconn_swap(int port)
+{
+	return 1;
+}
+
+void board_reset_pd_mcu(void) {}
+
+
+/*****************************************************************************
+ * Partner utility functions
+ */
+static enum pd_data_role partner_data_role;
+void partner_set_data_role(enum pd_data_role data_role)
+{
+	partner_data_role = data_role;
+}
+enum pd_data_role partner_get_data_role(void)
+{
+	return partner_data_role;
+}
+
+static enum pd_power_role partner_power_role;
+void partner_set_power_role(enum pd_power_role power_role)
+{
+	partner_power_role = power_role;
+}
+enum pd_power_role partner_get_power_role(void)
+{
+	return partner_power_role;
+}
+
+static enum pd_rev_type partner_pd_rev;
+void partner_set_pd_rev(enum pd_rev_type pd_rev)
+{
+	partner_pd_rev = pd_rev;
+}
+enum pd_rev_type partner_get_pd_rev(void)
+{
+	return partner_pd_rev;
+}
+
+void partner_send_msg(enum pd_msg_type sop,
+		      uint16_t type,
+		      uint16_t cnt,
+		      uint16_t ext,
+		      uint32_t *payload)
+{
+	uint16_t header;
+
+	partner_tx_id &= 7;
+	header = PD_HEADER(type,
+			partner_get_power_role(),
+			partner_get_data_role(),
+			partner_tx_id,
+			cnt,
+			partner_get_pd_rev(),
+			ext);
+
+	mock_tcpci_receive(sop, header, payload);
+	partner_tx_id++;
+	mock_set_alert(TCPC_REG_ALERT_RX_STATUS);
+}
+
+
+/*****************************************************************************
+ * TCPCI clean power up
+ */
+int tcpci_startup(void)
+{
+	/* Should be in low power mode before AP boots. */
+	TEST_EQ(mock_tcpci_get_reg(TCPC_REG_COMMAND),
+		TCPC_REG_COMMAND_I2CIDLE, "%d");
+	task_wait_event(10 * SECOND);
+
+	hook_notify(HOOK_CHIPSET_STARTUP);
+	task_wait_event(5 * MSEC);
+	hook_notify(HOOK_CHIPSET_RESUME);
+
+	task_wait_event(10 * SECOND);
+	/* Should be in low power mode and DRP auto-toggling with AP in S0. */
+	TEST_EQ((mock_tcpci_get_reg(TCPC_REG_ROLE_CTRL)
+		 & TCPC_REG_ROLE_CTRL_DRP_MASK),
+		TCPC_REG_ROLE_CTRL_DRP_MASK, "%d");
+	/* TODO: check previous command was TCPC_REG_COMMAND_LOOK4CONNECTION */
+	TEST_EQ(mock_tcpci_get_reg(TCPC_REG_COMMAND),
+		TCPC_REG_COMMAND_I2CIDLE, "%d");
+
+	return EC_SUCCESS;
+}
+
+/*****************************************************************************
+ * PROC.PD.E1. Bring-up procedure
+ */
+int proc_pd_e1(enum pd_data_role data_role)
+{
+	/*
+	 * a) The test starts in a disconnected state.
+	 */
+	TEST_EQ(pd_get_data_role(I2C_PORT_HOST_TCPC),
+		PD_ROLE_DISCONNECTED, "%d");
+
+	switch (data_role) {
+	case PD_ROLE_UFP:
+		/*
+		 * b) The tester applies Rp (3A) and waits for the UUT
+		 *    attachment.
+		 */
+		mock_set_cc(MOCK_CC_DUT_IS_SNK,
+			    MOCK_CC_SNK_OPEN,
+			    MOCK_CC_SNK_RP_3_0);
+		mock_set_alert(TCPC_REG_ALERT_CC_STATUS);
+		task_wait_event(5 * MSEC);
+
+		partner_set_data_role(PD_ROLE_DFP);
+		partner_set_power_role(PD_ROLE_SOURCE);
+
+		/*
+		 * c) If Ra is detected, the tester applies Vconn.
+		 */
+
+		/*
+		 * d) The tester applies Vbus and waits 50 ms.
+		 */
+		mock_tcpci_set_reg_bits(TCPC_REG_POWER_STATUS,
+					TCPC_REG_POWER_STATUS_VBUS_PRES);
+
+		mock_tcpci_clr_reg_bits(TCPC_REG_EXT_STATUS,
+					TCPC_REG_EXT_STATUS_SAFE0V);
+		mock_set_alert(TCPC_REG_ALERT_EXT_STATUS |
+			       TCPC_REG_ALERT_POWER_STATUS);
+
+		task_wait_event(50 * MSEC);
+
+		/*
+		 * e) The tester transmits Source Capabilities until reception
+		 *    of GoodCrc for tNoResponse max (5.5s). The Source
+		 *    Capabilities includes Fixed 5V 3A PDO.
+		 */
+		partner_send_msg(PD_MSG_SOP, PD_DATA_SOURCE_CAP, 1, 0, &pdo);
+
+		/*
+		 * f) The tester waits for the Request from the UUT for
+		 *    tSenderResponse max (30 ms).
+		 */
+		TEST_EQ(verify_tcpci_transmit(TCPC_TX_SOP, 0, PD_DATA_REQUEST),
+			EC_SUCCESS, "%d");
+		mock_set_alert(TCPC_REG_ALERT_TX_SUCCESS);
+
+		/*
+		 * g) The tester sends Accept, and when Vbus is stable at the
+		 *    target voltage, sends PS_RDY.
+		 */
+		partner_send_msg(PD_MSG_SOP, PD_CTRL_ACCEPT, 0, 0, NULL);
+		task_wait_event(10 * MSEC);
+		partner_send_msg(PD_MSG_SOP, PD_CTRL_PS_RDY, 0, 0, NULL);
+		task_wait_event(1 * MSEC);
+		break;
+
+	case PD_ROLE_DFP:
+		/*
+		 * b) The tester applies Rd and waits for Vbus for tNoResponse
+		 *    max (5.5 s).
+		 */
+		mock_set_cc(MOCK_CC_DUT_IS_SRC,
+			    MOCK_CC_SRC_OPEN,
+			    MOCK_CC_SRC_RD);
+		mock_set_alert(TCPC_REG_ALERT_CC_STATUS);
+
+		partner_set_data_role(PD_ROLE_UFP);
+		partner_set_power_role(PD_ROLE_SINK);
+
+		/*
+		 * c) The tester waits Source Capabilities for for tNoResponse
+		 *    max (5.5 s).
+		 */
+		TEST_EQ(verify_tcpci_transmit(TCPC_TX_SOP,
+					      0,
+					      PD_DATA_SOURCE_CAP),
+			EC_SUCCESS, "%d");
+
+		/*
+		 * d) The tester replies GoodCrc on reception of the Source
+		 *    Capabilities.
+		 */
+		mock_set_alert(TCPC_REG_ALERT_TX_SUCCESS);
+		task_wait_event(10 * MSEC);
+
+		/*
+		 * e) The tester requests 5V 0.5A.
+		 */
+		partner_send_msg(PD_MSG_SOP, PD_DATA_REQUEST, 1, 0, &rdo);
+
+		TEST_EQ(verify_tcpci_transmit(TCPC_TX_SOP, PD_CTRL_ACCEPT, 0),
+			EC_SUCCESS, "%d");
+		mock_set_alert(TCPC_REG_ALERT_TX_SUCCESS);
+
+		/*
+		 * f) The tester waits PS_RDY for tPSSourceOn max (480 ms).
+		 */
+		TEST_EQ(verify_tcpci_transmit(TCPC_TX_SOP, PD_CTRL_PS_RDY, 0),
+			EC_SUCCESS, "%d");
+		mock_set_alert(TCPC_REG_ALERT_TX_SUCCESS);
+		break;
+
+	case PD_ROLE_DISCONNECTED:
+		break;
+	}
+
+	TEST_EQ(pd_get_data_role(I2C_PORT_HOST_TCPC), data_role, "%d");
+	return EC_SUCCESS;
+}
diff --git a/test/usb_tcpmv2_td_pd_ll_e3.c b/test/usb_tcpmv2_td_pd_ll_e3.c
new file mode 100644
index 0000000000..d2aedf2b9d
--- /dev/null
+++ b/test/usb_tcpmv2_td_pd_ll_e3.c
@@ -0,0 +1,164 @@
+/* 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.
+ */
+
+#include "mock/tcpci_i2c_mock.h"
+#include "task.h"
+#include "tcpci.h"
+#include "test_util.h"
+#include "timer.h"
+#include "usb_tcpmv2_compliance.h"
+
+/*****************************************************************************
+ * TD.PD.LL.E3. Soft Reset Usage
+ *
+ * Description:
+ *	Check that the UUT will issue a Soft Reset after unsuccessful retries,
+ *	and that the link can be successfully recovered after that.
+ */
+static int td_pd_ll_e3(enum pd_data_role data_role)
+{
+	int retry, retries;
+
+	TEST_EQ(tcpci_startup(), EC_SUCCESS, "%d");
+
+	/*
+	 * Set Vbus to Safe0V
+	 */
+	mock_tcpci_set_reg_bits(TCPC_REG_EXT_STATUS,
+				TCPC_REG_EXT_STATUS_SAFE0V);
+	mock_set_alert(TCPC_REG_ALERT_EXT_STATUS);
+	task_wait_event(10 * SECOND);
+
+	/*
+	 * a) Run PROC.PD.E1 Bring-up according to the UUT role.
+	 */
+	TEST_EQ(proc_pd_e1(data_role), EC_SUCCESS, "%d");
+
+	/*
+	 * Make sure we are idle. Reject everything that is pending
+	 */
+	for (;;) {
+		if (mock_rm_if_tx(TCPC_TX_SOP,
+				  PD_CTRL_DR_SWAP, 0)) {
+			mock_set_alert(TCPC_REG_ALERT_TX_SUCCESS);
+
+			partner_send_msg(PD_MSG_SOP,
+					 PD_CTRL_REJECT,
+					 0, 0, NULL);
+			task_wait_event(1 * MSEC);
+			continue;
+		}
+		if (mock_rm_if_tx(TCPC_TX_SOP,
+				  PD_CTRL_VCONN_SWAP, 0)) {
+			mock_set_alert(TCPC_REG_ALERT_TX_SUCCESS);
+
+			partner_send_msg(PD_MSG_SOP,
+					 PD_CTRL_REJECT,
+					 0, 0, NULL);
+			task_wait_event(1 * MSEC);
+			continue;
+		}
+		if (mock_rm_if_tx(TCPC_TX_SOP,
+				  0, PD_DATA_VENDOR_DEF)) {
+			mock_set_alert(TCPC_REG_ALERT_TX_SUCCESS);
+
+			partner_send_msg(PD_MSG_SOP,
+					 PD_CTRL_NOT_SUPPORTED,
+					 0, 0, NULL);
+			task_wait_event(1 * MSEC);
+			continue;
+		}
+		if (mock_rm_if_tx(TCPC_TX_SOP,
+				  PD_CTRL_GET_SINK_CAP, 0)) {
+			mock_set_alert(TCPC_REG_ALERT_TX_SUCCESS);
+
+			partner_send_msg(PD_MSG_SOP,
+					 PD_CTRL_REJECT,
+					 0, 0, NULL);
+			task_wait_event(1 * MSEC);
+			continue;
+		}
+		break;
+	}
+
+	/*
+	 * b) Send a Get_Sink_Cap message to the UUT, wait for a reply
+	 *    and do not send GoodCrc for nRetryCount + 1 times
+	 *    (nRetryCount equals 3 since PD 2.1).
+	 */
+	partner_send_msg(PD_MSG_SOP,
+			 PD_CTRL_GET_SINK_CAP,
+			 0, 0, NULL);
+
+	retries = (partner_get_pd_rev() == PD_REV30) ? 2 : 3;
+	for (retry = 0; retry <= retries; retry++) {
+		TEST_EQ(verify_tcpci_ignore_transmit(
+				TCPC_TX_SOP,
+				0, PD_DATA_SINK_CAP),
+			EC_SUCCESS, "%d");
+	}
+
+	/*
+	 * c) Check that the UUT issues a Soft Reset.
+	 */
+	TEST_EQ(verify_tcpci_transmit(TCPC_TX_SOP, PD_CTRL_SOFT_RESET, 0),
+		EC_SUCCESS, "%d");
+	mock_set_alert(TCPC_REG_ALERT_TX_SUCCESS);
+	task_wait_event(10 * MSEC);
+
+	/*
+	 * d) Handle correctly the Soft Reset procedure.
+	 */
+	partner_send_msg(PD_MSG_SOP, PD_CTRL_ACCEPT, 0, 0, NULL);
+	task_wait_event(1 * MSEC);
+
+	/*
+	 * e) Continue the bring-up procedure and check that the link is
+	 *    successfully established.
+	 */
+	if (partner_get_power_role() == PD_ROLE_SINK) {
+		TEST_EQ(verify_tcpci_transmit(TCPC_TX_SOP,
+					      0,
+					      PD_DATA_SOURCE_CAP),
+			EC_SUCCESS, "%d");
+
+		mock_set_alert(TCPC_REG_ALERT_TX_SUCCESS);
+		task_wait_event(10 * MSEC);
+
+		partner_send_msg(PD_MSG_SOP, PD_DATA_REQUEST, 1, 0, &rdo);
+
+		TEST_EQ(verify_tcpci_transmit(TCPC_TX_SOP, PD_CTRL_ACCEPT, 0),
+			EC_SUCCESS, "%d");
+		mock_set_alert(TCPC_REG_ALERT_TX_SUCCESS);
+
+		TEST_EQ(verify_tcpci_transmit(TCPC_TX_SOP, PD_CTRL_PS_RDY, 0),
+			EC_SUCCESS, "%d");
+		mock_set_alert(TCPC_REG_ALERT_TX_SUCCESS);
+		task_wait_event(5 * MSEC);
+
+		partner_send_msg(PD_MSG_SOP, PD_CTRL_ACCEPT, 0, 0, NULL);
+		task_wait_event(1 * MSEC);
+	} else {
+		partner_send_msg(PD_MSG_SOP, PD_DATA_SOURCE_CAP, 1, 0, &pdo);
+
+		TEST_EQ(verify_tcpci_transmit(TCPC_TX_SOP, 0, PD_DATA_REQUEST),
+			EC_SUCCESS, "%d");
+		mock_set_alert(TCPC_REG_ALERT_TX_SUCCESS);
+
+		partner_send_msg(PD_MSG_SOP, PD_CTRL_ACCEPT, 0, 0, NULL);
+		task_wait_event(10 * MSEC);
+		partner_send_msg(PD_MSG_SOP, PD_CTRL_PS_RDY, 0, 0, NULL);
+		task_wait_event(1 * MSEC);
+	}
+	return EC_SUCCESS;
+}
+int test_td_pd_ll_e3_dfp(void)
+{
+	return td_pd_ll_e3(PD_ROLE_DFP);
+}
+int test_td_pd_ll_e3_ufp(void)
+{
+	return td_pd_ll_e3(PD_ROLE_UFP);
+}