// SPDX-License-Identifier: GPL-2.0
/*
 * Kunit tests for ChromeOS Embedded Controller protocol.
 */

#include <kunit/test.h>

#include <linux/unaligned.h>

#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>

#include "cros_ec.h"
#include "cros_ec_proto_test_util.h"

#define BUFSIZE 512

struct cros_ec_proto_test_priv {
        struct cros_ec_device ec_dev;
        u8 dout[BUFSIZE];
        u8 din[BUFSIZE];
        struct cros_ec_command *msg;
        u8 _msg[BUFSIZE];
};

static void cros_ec_proto_test_prepare_tx_legacy_normal(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct cros_ec_command *msg = priv->msg;
        int ret, i;
        u8 csum;

        ec_dev->proto_version = 2;

        msg->command = EC_CMD_HELLO;
        msg->outsize = EC_PROTO2_MAX_PARAM_SIZE;
        msg->data[0] = 0xde;
        msg->data[1] = 0xad;
        msg->data[2] = 0xbe;
        msg->data[3] = 0xef;

        ret = cros_ec_prepare_tx(ec_dev, msg);

        KUNIT_EXPECT_EQ(test, ret, EC_MSG_TX_PROTO_BYTES + EC_PROTO2_MAX_PARAM_SIZE);
        KUNIT_EXPECT_EQ(test, ec_dev->dout[0], EC_CMD_VERSION0);
        KUNIT_EXPECT_EQ(test, ec_dev->dout[1], EC_CMD_HELLO);
        KUNIT_EXPECT_EQ(test, ec_dev->dout[2], EC_PROTO2_MAX_PARAM_SIZE);
        KUNIT_EXPECT_EQ(test, EC_MSG_TX_HEADER_BYTES, 3);
        KUNIT_EXPECT_EQ(test, ec_dev->dout[EC_MSG_TX_HEADER_BYTES + 0], 0xde);
        KUNIT_EXPECT_EQ(test, ec_dev->dout[EC_MSG_TX_HEADER_BYTES + 1], 0xad);
        KUNIT_EXPECT_EQ(test, ec_dev->dout[EC_MSG_TX_HEADER_BYTES + 2], 0xbe);
        KUNIT_EXPECT_EQ(test, ec_dev->dout[EC_MSG_TX_HEADER_BYTES + 3], 0xef);
        for (i = 4; i < EC_PROTO2_MAX_PARAM_SIZE; ++i)
                KUNIT_EXPECT_EQ(test, ec_dev->dout[EC_MSG_TX_HEADER_BYTES + i], 0);

        csum = EC_CMD_VERSION0;
        csum += EC_CMD_HELLO;
        csum += EC_PROTO2_MAX_PARAM_SIZE;
        csum += 0xde;
        csum += 0xad;
        csum += 0xbe;
        csum += 0xef;
        KUNIT_EXPECT_EQ(test,
                        ec_dev->dout[EC_MSG_TX_HEADER_BYTES + EC_PROTO2_MAX_PARAM_SIZE],
                        csum);
}

static void cros_ec_proto_test_prepare_tx_legacy_bad_msg_outsize(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct cros_ec_command *msg = priv->msg;
        int ret;

        ec_dev->proto_version = 2;

        msg->outsize = EC_PROTO2_MAX_PARAM_SIZE + 1;

        ret = cros_ec_prepare_tx(ec_dev, msg);
        KUNIT_EXPECT_EQ(test, ret, -EINVAL);
}

static void cros_ec_proto_test_prepare_tx_normal(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct cros_ec_command *msg = priv->msg;
        struct ec_host_request *request = (struct ec_host_request *)ec_dev->dout;
        int ret, i;
        u8 csum;

        msg->command = EC_CMD_HELLO;
        msg->outsize = 0x88;
        msg->data[0] = 0xde;
        msg->data[1] = 0xad;
        msg->data[2] = 0xbe;
        msg->data[3] = 0xef;

        ret = cros_ec_prepare_tx(ec_dev, msg);

        KUNIT_EXPECT_EQ(test, ret, sizeof(*request) + 0x88);

        KUNIT_EXPECT_EQ(test, request->struct_version, EC_HOST_REQUEST_VERSION);
        KUNIT_EXPECT_EQ(test, request->command, EC_CMD_HELLO);
        KUNIT_EXPECT_EQ(test, request->command_version, 0);
        KUNIT_EXPECT_EQ(test, request->data_len, 0x88);
        KUNIT_EXPECT_EQ(test, ec_dev->dout[sizeof(*request) + 0], 0xde);
        KUNIT_EXPECT_EQ(test, ec_dev->dout[sizeof(*request) + 1], 0xad);
        KUNIT_EXPECT_EQ(test, ec_dev->dout[sizeof(*request) + 2], 0xbe);
        KUNIT_EXPECT_EQ(test, ec_dev->dout[sizeof(*request) + 3], 0xef);
        for (i = 4; i < 0x88; ++i)
                KUNIT_EXPECT_EQ(test, ec_dev->dout[sizeof(*request) + i], 0);

        csum = EC_HOST_REQUEST_VERSION;
        csum += EC_CMD_HELLO;
        csum += 0x88;
        csum += 0xde;
        csum += 0xad;
        csum += 0xbe;
        csum += 0xef;
        KUNIT_EXPECT_EQ(test, request->checksum, (u8)-csum);
}

static void cros_ec_proto_test_prepare_tx_bad_msg_outsize(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct cros_ec_command *msg = priv->msg;
        int ret;

        msg->outsize = ec_dev->dout_size - sizeof(struct ec_host_request) + 1;

        ret = cros_ec_prepare_tx(ec_dev, msg);
        KUNIT_EXPECT_EQ(test, ret, -EINVAL);
}

static void cros_ec_proto_test_check_result(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct cros_ec_command *msg = priv->msg;
        int ret, i;
        static enum ec_status status[] = {
                EC_RES_SUCCESS,
                EC_RES_INVALID_COMMAND,
                EC_RES_ERROR,
                EC_RES_INVALID_PARAM,
                EC_RES_ACCESS_DENIED,
                EC_RES_INVALID_RESPONSE,
                EC_RES_INVALID_VERSION,
                EC_RES_INVALID_CHECKSUM,
                EC_RES_UNAVAILABLE,
                EC_RES_TIMEOUT,
                EC_RES_OVERFLOW,
                EC_RES_INVALID_HEADER,
                EC_RES_REQUEST_TRUNCATED,
                EC_RES_RESPONSE_TOO_BIG,
                EC_RES_BUS_ERROR,
                EC_RES_BUSY,
                EC_RES_INVALID_HEADER_VERSION,
                EC_RES_INVALID_HEADER_CRC,
                EC_RES_INVALID_DATA_CRC,
                EC_RES_DUP_UNAVAILABLE,
        };

        for (i = 0; i < ARRAY_SIZE(status); ++i) {
                msg->result = status[i];
                ret = cros_ec_check_result(ec_dev, msg);
                KUNIT_EXPECT_EQ(test, ret, 0);
        }

        msg->result = EC_RES_IN_PROGRESS;
        ret = cros_ec_check_result(ec_dev, msg);
        KUNIT_EXPECT_EQ(test, ret, -EAGAIN);
}

static void cros_ec_proto_test_query_all_pretest(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;

        /*
         * cros_ec_query_all() will free din and dout and allocate them again to fit the usage by
         * calling devm_kfree() and devm_kzalloc().  Set them to NULL as they aren't managed by
         * ec_dev->dev but allocated statically in struct cros_ec_proto_test_priv
         * (see cros_ec_proto_test_init()).
         */
        ec_dev->din = NULL;
        ec_dev->dout = NULL;
}

static void cros_ec_proto_test_query_all_normal(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;

        /* For cros_ec_get_proto_info() without passthru. */
        {
                struct ec_response_get_protocol_info *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (struct ec_response_get_protocol_info *)mock->o_data;
                data->protocol_versions = BIT(3) | BIT(2);
                data->max_request_packet_size = 0xbe;
                data->max_response_packet_size = 0xef;
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                struct ec_response_get_protocol_info *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (struct ec_response_get_protocol_info *)mock->o_data;
                data->max_request_packet_size = 0xbf;
        }

        /* For cros_ec_get_host_command_version_mask() for MKBP. */
        {
                struct ec_response_get_cmd_versions *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (struct ec_response_get_cmd_versions *)mock->o_data;
                data->version_mask = BIT(6) | BIT(5);
        }

        /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
        {
                struct ec_response_get_cmd_versions *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (struct ec_response_get_cmd_versions *)mock->o_data;
                data->version_mask = BIT(1);
        }

        /* For cros_ec_get_host_event_wake_mask(). */
        {
                struct ec_response_host_event_mask *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (struct ec_response_host_event_mask *)mock->o_data;
                data->mask = 0xbeef;
        }

        cros_ec_proto_test_query_all_pretest(test);
        ret = cros_ec_query_all(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, 0);

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);

                KUNIT_EXPECT_EQ(test, ec_dev->max_request, 0xbe - sizeof(struct ec_host_request));
                KUNIT_EXPECT_EQ(test, ec_dev->max_response, 0xef - sizeof(struct ec_host_response));
                KUNIT_EXPECT_EQ(test, ec_dev->proto_version, 3);
                KUNIT_EXPECT_EQ(test, ec_dev->din_size, 0xef + EC_MAX_RESPONSE_OVERHEAD);
                KUNIT_EXPECT_EQ(test, ec_dev->dout_size, 0xbe + EC_MAX_REQUEST_OVERHEAD);
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command,
                                EC_CMD_PASSTHRU_OFFSET(CROS_EC_DEV_PD_INDEX) |
                                EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);

                KUNIT_EXPECT_EQ(test, ec_dev->max_passthru, 0xbf - sizeof(struct ec_host_request));
        }

        /* For cros_ec_get_host_command_version_mask() for MKBP. */
        {
                struct ec_params_get_cmd_versions *data;

                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_CMD_VERSIONS);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_cmd_versions));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(*data));

                data = (struct ec_params_get_cmd_versions *)mock->i_data;
                KUNIT_EXPECT_EQ(test, data->cmd, EC_CMD_GET_NEXT_EVENT);

                KUNIT_EXPECT_EQ(test, ec_dev->mkbp_event_supported, 7);
        }

        /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
        {
                struct ec_params_get_cmd_versions *data;

                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_CMD_VERSIONS);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_cmd_versions));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(*data));

                data = (struct ec_params_get_cmd_versions *)mock->i_data;
                KUNIT_EXPECT_EQ(test, data->cmd, EC_CMD_HOST_SLEEP_EVENT);

                KUNIT_EXPECT_TRUE(test, ec_dev->host_sleep_v1);
        }

        /* For cros_ec_get_host_event_wake_mask(). */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_HOST_EVENT_GET_WAKE_MASK);
                KUNIT_EXPECT_EQ(test, mock->msg.insize, sizeof(struct ec_response_host_event_mask));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);

                KUNIT_EXPECT_EQ(test, ec_dev->host_event_wake_mask, 0xbeef);
        }
}

static void cros_ec_proto_test_query_all_no_pd_return_error(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;

        /* Set some garbage bytes. */
        ec_dev->max_passthru = 0xbf;

        /* For cros_ec_get_proto_info() without passthru. */
        {
                struct ec_response_get_protocol_info *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                /*
                 * Although it doesn't check the value, provides valid sizes so that
                 * cros_ec_query_all() allocates din and dout correctly.
                 */
                data = (struct ec_response_get_protocol_info *)mock->o_data;
                data->max_request_packet_size = 0xbe;
                data->max_response_packet_size = 0xef;
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        cros_ec_proto_test_query_all_pretest(test);
        ret = cros_ec_query_all(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, 0);

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command,
                                EC_CMD_PASSTHRU_OFFSET(CROS_EC_DEV_PD_INDEX) |
                                EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);

                KUNIT_EXPECT_EQ(test, ec_dev->max_passthru, 0);
        }
}

static void cros_ec_proto_test_query_all_no_pd_return0(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;

        /* Set some garbage bytes. */
        ec_dev->max_passthru = 0xbf;

        /* For cros_ec_get_proto_info() without passthru. */
        {
                struct ec_response_get_protocol_info *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                /*
                 * Although it doesn't check the value, provides valid sizes so that
                 * cros_ec_query_all() allocates din and dout correctly.
                 */
                data = (struct ec_response_get_protocol_info *)mock->o_data;
                data->max_request_packet_size = 0xbe;
                data->max_response_packet_size = 0xef;
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_add(test, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        cros_ec_proto_test_query_all_pretest(test);
        ret = cros_ec_query_all(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, 0);

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command,
                                EC_CMD_PASSTHRU_OFFSET(CROS_EC_DEV_PD_INDEX) |
                                EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);

                KUNIT_EXPECT_EQ(test, ec_dev->max_passthru, 0);
        }
}

static void cros_ec_proto_test_query_all_legacy_normal_v3_return_error(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For cros_ec_get_proto_info_legacy(). */
        {
                struct ec_response_hello *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (struct ec_response_hello *)mock->o_data;
                data->out_data = 0xa1b2c3d4;
        }

        cros_ec_proto_test_query_all_pretest(test);
        ret = cros_ec_query_all(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, 0);

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_proto_info_legacy(). */
        {
                struct ec_params_hello *data;

                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_HELLO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize, sizeof(struct ec_response_hello));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(*data));

                data = (struct ec_params_hello *)mock->i_data;
                KUNIT_EXPECT_EQ(test, data->in_data, 0xa0b0c0d0);

                KUNIT_EXPECT_EQ(test, ec_dev->proto_version, 2);
                KUNIT_EXPECT_EQ(test, ec_dev->max_request, EC_PROTO2_MAX_PARAM_SIZE);
                KUNIT_EXPECT_EQ(test, ec_dev->max_response, EC_PROTO2_MAX_PARAM_SIZE);
                KUNIT_EXPECT_EQ(test, ec_dev->max_passthru, 0);
                KUNIT_EXPECT_PTR_EQ(test, ec_dev->pkt_xfer, NULL);
                KUNIT_EXPECT_EQ(test, ec_dev->din_size, EC_PROTO2_MSG_BYTES);
                KUNIT_EXPECT_EQ(test, ec_dev->dout_size, EC_PROTO2_MSG_BYTES);
        }
}

static void cros_ec_proto_test_query_all_legacy_normal_v3_return0(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_add(test, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For cros_ec_get_proto_info_legacy(). */
        {
                struct ec_response_hello *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (struct ec_response_hello *)mock->o_data;
                data->out_data = 0xa1b2c3d4;
        }

        cros_ec_proto_test_query_all_pretest(test);
        ret = cros_ec_query_all(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, 0);

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_proto_info_legacy(). */
        {
                struct ec_params_hello *data;

                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_HELLO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize, sizeof(struct ec_response_hello));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(*data));

                data = (struct ec_params_hello *)mock->i_data;
                KUNIT_EXPECT_EQ(test, data->in_data, 0xa0b0c0d0);

                KUNIT_EXPECT_EQ(test, ec_dev->proto_version, 2);
                KUNIT_EXPECT_EQ(test, ec_dev->max_request, EC_PROTO2_MAX_PARAM_SIZE);
                KUNIT_EXPECT_EQ(test, ec_dev->max_response, EC_PROTO2_MAX_PARAM_SIZE);
                KUNIT_EXPECT_EQ(test, ec_dev->max_passthru, 0);
                KUNIT_EXPECT_PTR_EQ(test, ec_dev->pkt_xfer, NULL);
                KUNIT_EXPECT_EQ(test, ec_dev->din_size, EC_PROTO2_MSG_BYTES);
                KUNIT_EXPECT_EQ(test, ec_dev->dout_size, EC_PROTO2_MSG_BYTES);
        }
}

static void cros_ec_proto_test_query_all_legacy_xfer_error(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For cros_ec_get_proto_info_legacy(). */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, -EIO, EC_RES_SUCCESS, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        cros_ec_proto_test_query_all_pretest(test);
        ret = cros_ec_query_all(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, -EIO);
        KUNIT_EXPECT_EQ(test, ec_dev->proto_version, EC_PROTO_VERSION_UNKNOWN);

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_proto_info_legacy(). */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_HELLO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize, sizeof(struct ec_response_hello));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_hello));
        }
}

static void cros_ec_proto_test_query_all_legacy_return_error(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For cros_ec_get_proto_info_legacy(). */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        cros_ec_proto_test_query_all_pretest(test);
        ret = cros_ec_query_all(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, -EOPNOTSUPP);
        KUNIT_EXPECT_EQ(test, ec_dev->proto_version, EC_PROTO_VERSION_UNKNOWN);

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_proto_info_legacy(). */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_HELLO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize, sizeof(struct ec_response_hello));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_hello));
        }
}

static void cros_ec_proto_test_query_all_legacy_data_error(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For cros_ec_get_proto_info_legacy(). */
        {
                struct ec_response_hello *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (struct ec_response_hello *)mock->o_data;
                data->out_data = 0xbeefbfbf;
        }

        cros_ec_proto_test_query_all_pretest(test);
        ret = cros_ec_query_all(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, -EBADMSG);
        KUNIT_EXPECT_EQ(test, ec_dev->proto_version, EC_PROTO_VERSION_UNKNOWN);

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_proto_info_legacy(). */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_HELLO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize, sizeof(struct ec_response_hello));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_hello));
        }
}

static void cros_ec_proto_test_query_all_legacy_return0(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For cros_ec_get_proto_info_legacy(). */
        {
                mock = cros_kunit_ec_xfer_mock_add(test, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        cros_ec_proto_test_query_all_pretest(test);
        ret = cros_ec_query_all(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, -EPROTO);
        KUNIT_EXPECT_EQ(test, ec_dev->proto_version, EC_PROTO_VERSION_UNKNOWN);

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_proto_info_legacy(). */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_HELLO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize, sizeof(struct ec_response_hello));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_hello));
        }
}

static void cros_ec_proto_test_query_all_no_mkbp(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;

        /* Set some garbage bytes. */
        ec_dev->mkbp_event_supported = 0xbf;

        /* For cros_ec_get_proto_info() without passthru. */
        {
                struct ec_response_get_protocol_info *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                /*
                 * Although it doesn't check the value, provides valid sizes so that
                 * cros_ec_query_all() allocates din and dout correctly.
                 */
                data = (struct ec_response_get_protocol_info *)mock->o_data;
                data->max_request_packet_size = 0xbe;
                data->max_response_packet_size = 0xef;
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For cros_ec_get_host_command_version_mask() for MKBP. */
        {
                struct ec_response_get_cmd_versions *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (struct ec_response_get_cmd_versions *)mock->o_data;
                data->version_mask = 0;
        }

        cros_ec_proto_test_query_all_pretest(test);
        ret = cros_ec_query_all(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, 0);

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command,
                                EC_CMD_PASSTHRU_OFFSET(CROS_EC_DEV_PD_INDEX) |
                                EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_host_command_version_mask() for MKBP. */
        {
                struct ec_params_get_cmd_versions *data;

                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_CMD_VERSIONS);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_cmd_versions));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(*data));

                data = (struct ec_params_get_cmd_versions *)mock->i_data;
                KUNIT_EXPECT_EQ(test, data->cmd, EC_CMD_GET_NEXT_EVENT);

                KUNIT_EXPECT_EQ(test, ec_dev->mkbp_event_supported, 0);
        }
}

static void cros_ec_proto_test_query_all_no_mkbp_return_error(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;

        /* Set some garbage bytes. */
        ec_dev->mkbp_event_supported = 0xbf;

        /* For cros_ec_get_proto_info() without passthru. */
        {
                struct ec_response_get_protocol_info *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                /*
                 * Although it doesn't check the value, provides valid sizes so that
                 * cros_ec_query_all() allocates din and dout correctly.
                 */
                data = (struct ec_response_get_protocol_info *)mock->o_data;
                data->max_request_packet_size = 0xbe;
                data->max_response_packet_size = 0xef;
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For cros_ec_get_host_command_version_mask() for MKBP. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        cros_ec_proto_test_query_all_pretest(test);
        ret = cros_ec_query_all(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, 0);

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command,
                                EC_CMD_PASSTHRU_OFFSET(CROS_EC_DEV_PD_INDEX) |
                                EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_host_command_version_mask() for MKBP. */
        {
                struct ec_params_get_cmd_versions *data;

                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_CMD_VERSIONS);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_cmd_versions));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(*data));

                data = (struct ec_params_get_cmd_versions *)mock->i_data;
                KUNIT_EXPECT_EQ(test, data->cmd, EC_CMD_GET_NEXT_EVENT);

                KUNIT_EXPECT_EQ(test, ec_dev->mkbp_event_supported, 0);
        }
}

static void cros_ec_proto_test_query_all_no_mkbp_return0(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;

        /* Set some garbage bytes. */
        ec_dev->mkbp_event_supported = 0xbf;

        /* For cros_ec_get_proto_info() without passthru. */
        {
                struct ec_response_get_protocol_info *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                /*
                 * Although it doesn't check the value, provides valid sizes so that
                 * cros_ec_query_all() allocates din and dout correctly.
                 */
                data = (struct ec_response_get_protocol_info *)mock->o_data;
                data->max_request_packet_size = 0xbe;
                data->max_response_packet_size = 0xef;
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For cros_ec_get_host_command_version_mask() for MKBP. */
        {
                mock = cros_kunit_ec_xfer_mock_add(test, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        cros_ec_proto_test_query_all_pretest(test);
        ret = cros_ec_query_all(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, 0);

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command,
                                EC_CMD_PASSTHRU_OFFSET(CROS_EC_DEV_PD_INDEX) |
                                EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_host_command_version_mask() for MKBP. */
        {
                struct ec_params_get_cmd_versions *data;

                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_CMD_VERSIONS);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_cmd_versions));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(*data));

                data = (struct ec_params_get_cmd_versions *)mock->i_data;
                KUNIT_EXPECT_EQ(test, data->cmd, EC_CMD_GET_NEXT_EVENT);

                KUNIT_EXPECT_EQ(test, ec_dev->mkbp_event_supported, 0);
        }
}

static void cros_ec_proto_test_query_all_no_host_sleep(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;

        /* Set some garbage bytes. */
        ec_dev->host_sleep_v1 = true;

        /* For cros_ec_get_proto_info() without passthru. */
        {
                struct ec_response_get_protocol_info *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                /*
                 * Although it doesn't check the value, provides valid sizes so that
                 * cros_ec_query_all() allocates din and dout correctly.
                 */
                data = (struct ec_response_get_protocol_info *)mock->o_data;
                data->max_request_packet_size = 0xbe;
                data->max_response_packet_size = 0xef;
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For cros_ec_get_host_command_version_mask() for MKBP. */
        {
                mock = cros_kunit_ec_xfer_mock_add(test, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
        {
                struct ec_response_get_cmd_versions *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (struct ec_response_get_cmd_versions *)mock->o_data;
                data->version_mask = 0;
        }

        cros_ec_proto_test_query_all_pretest(test);
        ret = cros_ec_query_all(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, 0);

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command,
                                EC_CMD_PASSTHRU_OFFSET(CROS_EC_DEV_PD_INDEX) |
                                EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_host_command_version_mask() for MKBP. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_CMD_VERSIONS);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_cmd_versions));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_get_cmd_versions));
        }

        /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_CMD_VERSIONS);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_cmd_versions));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_get_cmd_versions));

                KUNIT_EXPECT_FALSE(test, ec_dev->host_sleep_v1);
        }
}

static void cros_ec_proto_test_query_all_no_host_sleep_return0(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;

        /* Set some garbage bytes. */
        ec_dev->host_sleep_v1 = true;

        /* For cros_ec_get_proto_info() without passthru. */
        {
                struct ec_response_get_protocol_info *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                /*
                 * Although it doesn't check the value, provides valid sizes so that
                 * cros_ec_query_all() allocates din and dout correctly.
                 */
                data = (struct ec_response_get_protocol_info *)mock->o_data;
                data->max_request_packet_size = 0xbe;
                data->max_response_packet_size = 0xef;
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For cros_ec_get_host_command_version_mask() for MKBP. */
        {
                struct ec_response_get_cmd_versions *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                /* In order to pollute next cros_ec_get_host_command_version_mask(). */
                data = (struct ec_response_get_cmd_versions *)mock->o_data;
                data->version_mask = 0xbeef;
        }

        /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
        {
                mock = cros_kunit_ec_xfer_mock_add(test, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        cros_ec_proto_test_query_all_pretest(test);
        ret = cros_ec_query_all(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, 0);

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command,
                                EC_CMD_PASSTHRU_OFFSET(CROS_EC_DEV_PD_INDEX) |
                                EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_host_command_version_mask() for MKBP. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_CMD_VERSIONS);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_cmd_versions));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_get_cmd_versions));
        }

        /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_CMD_VERSIONS);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_cmd_versions));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_get_cmd_versions));

                KUNIT_EXPECT_FALSE(test, ec_dev->host_sleep_v1);
        }
}

static void cros_ec_proto_test_query_all_default_wake_mask_return_error(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;

        /* Set some garbage bytes. */
        ec_dev->host_event_wake_mask = U32_MAX;

        /* For cros_ec_get_proto_info() without passthru. */
        {
                struct ec_response_get_protocol_info *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                /*
                 * Although it doesn't check the value, provides valid sizes so that
                 * cros_ec_query_all() allocates din and dout correctly.
                 */
                data = (struct ec_response_get_protocol_info *)mock->o_data;
                data->max_request_packet_size = 0xbe;
                data->max_response_packet_size = 0xef;
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For cros_ec_get_host_command_version_mask() for MKBP. */
        {
                mock = cros_kunit_ec_xfer_mock_add(test, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
        {
                mock = cros_kunit_ec_xfer_mock_add(test, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For cros_ec_get_host_event_wake_mask(). */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        cros_ec_proto_test_query_all_pretest(test);
        ret = cros_ec_query_all(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, 0);

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command,
                                EC_CMD_PASSTHRU_OFFSET(CROS_EC_DEV_PD_INDEX) |
                                EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_host_command_version_mask() for MKBP. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_CMD_VERSIONS);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_cmd_versions));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_get_cmd_versions));
        }

        /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_CMD_VERSIONS);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_cmd_versions));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_get_cmd_versions));
        }

        /* For cros_ec_get_host_event_wake_mask(). */
        {
                u32 mask;

                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_HOST_EVENT_GET_WAKE_MASK);
                KUNIT_EXPECT_EQ(test, mock->msg.insize, sizeof(struct ec_response_host_event_mask));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);

                mask = ec_dev->host_event_wake_mask;
                KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_CLOSED), 0);
                KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_AC_DISCONNECTED), 0);
                KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_LOW), 0);
                KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_CRITICAL), 0);
                KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY), 0);
                KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_PD_MCU), 0);
                KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_STATUS), 0);
        }
}

static void cros_ec_proto_test_query_all_default_wake_mask_return0(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;

        /* Set some garbage bytes. */
        ec_dev->host_event_wake_mask = U32_MAX;

        /* For cros_ec_get_proto_info() without passthru. */
        {
                struct ec_response_get_protocol_info *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                /*
                 * Although it doesn't check the value, provides valid sizes so that
                 * cros_ec_query_all() allocates din and dout correctly.
                 */
                data = (struct ec_response_get_protocol_info *)mock->o_data;
                data->max_request_packet_size = 0xbe;
                data->max_response_packet_size = 0xef;
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For cros_ec_get_host_command_version_mask() for MKBP. */
        {
                mock = cros_kunit_ec_xfer_mock_add(test, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
        {
                mock = cros_kunit_ec_xfer_mock_add(test, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For get_host_event_wake_mask(). */
        {
                mock = cros_kunit_ec_xfer_mock_add(test, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        cros_ec_proto_test_query_all_pretest(test);
        ret = cros_ec_query_all(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, 0);

        /* For cros_ec_get_proto_info() without passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_proto_info() with passthru. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command,
                                EC_CMD_PASSTHRU_OFFSET(CROS_EC_DEV_PD_INDEX) |
                                EC_CMD_GET_PROTOCOL_INFO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_protocol_info));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        /* For cros_ec_get_host_command_version_mask() for MKBP. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_CMD_VERSIONS);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_cmd_versions));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_get_cmd_versions));
        }

        /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_CMD_VERSIONS);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_cmd_versions));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_get_cmd_versions));
        }

        /* For get_host_event_wake_mask(). */
        {
                u32 mask;

                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_HOST_EVENT_GET_WAKE_MASK);
                KUNIT_EXPECT_EQ(test, mock->msg.insize, sizeof(struct ec_response_host_event_mask));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);

                mask = ec_dev->host_event_wake_mask;
                KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_CLOSED), 0);
                KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_AC_DISCONNECTED), 0);
                KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_LOW), 0);
                KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_CRITICAL), 0);
                KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY), 0);
                KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_PD_MCU), 0);
                KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_STATUS), 0);
        }
}

static void cros_ec_proto_test_cmd_xfer_normal(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        DEFINE_RAW_FLEX(struct cros_ec_command, buf, data, 0x100);

        ec_dev->max_request = 0xff;
        ec_dev->max_response = 0xee;
        ec_dev->max_passthru = 0xdd;

        buf->version = 0;
        buf->command = EC_CMD_HELLO;
        buf->insize = 4;
        buf->outsize = 2;
        buf->data[0] = 0x55;
        buf->data[1] = 0xaa;

        {
                u8 *data;

                mock = cros_kunit_ec_xfer_mock_add(test, 4);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (u8 *)mock->o_data;
                data[0] = 0xaa;
                data[1] = 0x55;
                data[2] = 0xcc;
                data[3] = 0x33;
        }

        ret = cros_ec_cmd_xfer(ec_dev, buf);
        KUNIT_EXPECT_EQ(test, ret, 4);

        {
                u8 *data;

                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_HELLO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize, 4);
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 2);

                data = (u8 *)mock->i_data;
                KUNIT_EXPECT_EQ(test, data[0], 0x55);
                KUNIT_EXPECT_EQ(test, data[1], 0xaa);

                KUNIT_EXPECT_EQ(test, buf->data[0], 0xaa);
                KUNIT_EXPECT_EQ(test, buf->data[1], 0x55);
                KUNIT_EXPECT_EQ(test, buf->data[2], 0xcc);
                KUNIT_EXPECT_EQ(test, buf->data[3], 0x33);
        }
}

static void cros_ec_proto_test_cmd_xfer_excess_msg_insize(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        DEFINE_RAW_FLEX(struct cros_ec_command, buf, data, 0x100);

        ec_dev->max_request = 0xff;
        ec_dev->max_response = 0xee;
        ec_dev->max_passthru = 0xdd;

        buf->version = 0;
        buf->command = EC_CMD_HELLO;
        buf->insize = 0xee + 1;
        buf->outsize = 2;

        {
                mock = cros_kunit_ec_xfer_mock_add(test, 0xcc);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        ret = cros_ec_cmd_xfer(ec_dev, buf);
        KUNIT_EXPECT_EQ(test, ret, 0xcc);

        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_HELLO);
                KUNIT_EXPECT_EQ(test, mock->msg.insize, 0xee);
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 2);
        }
}

static void cros_ec_proto_test_cmd_xfer_excess_msg_outsize_without_passthru(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        int ret;
        DEFINE_RAW_FLEX(struct cros_ec_command, buf, data, 0x100);

        ec_dev->max_request = 0xff;
        ec_dev->max_response = 0xee;
        ec_dev->max_passthru = 0xdd;

        buf->version = 0;
        buf->command = EC_CMD_HELLO;
        buf->insize = 4;
        buf->outsize = 0xff + 1;

        ret = cros_ec_cmd_xfer(ec_dev, buf);
        KUNIT_EXPECT_EQ(test, ret, -EMSGSIZE);
}

static void cros_ec_proto_test_cmd_xfer_excess_msg_outsize_with_passthru(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        int ret;
        DEFINE_RAW_FLEX(struct cros_ec_command, buf, data, 0x100);

        ec_dev->max_request = 0xff;
        ec_dev->max_response = 0xee;
        ec_dev->max_passthru = 0xdd;

        buf->version = 0;
        buf->command = EC_CMD_PASSTHRU_OFFSET(CROS_EC_DEV_PD_INDEX) + EC_CMD_HELLO;
        buf->insize = 4;
        buf->outsize = 0xdd + 1;

        ret = cros_ec_cmd_xfer(ec_dev, buf);
        KUNIT_EXPECT_EQ(test, ret, -EMSGSIZE);
}

static void cros_ec_proto_test_cmd_xfer_protocol_v3_normal(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        int ret;
        struct cros_ec_command msg;

        memset(&msg, 0, sizeof(msg));

        ec_dev->proto_version = 3;
        ec_dev->cmd_xfer = cros_kunit_ec_cmd_xfer_mock;
        ec_dev->pkt_xfer = cros_kunit_ec_pkt_xfer_mock;

        ret = cros_ec_cmd_xfer(ec_dev, &msg);
        KUNIT_EXPECT_EQ(test, ret, 0);

        KUNIT_EXPECT_EQ(test, cros_kunit_ec_cmd_xfer_mock_called, 0);
        KUNIT_EXPECT_EQ(test, cros_kunit_ec_pkt_xfer_mock_called, 1);
}

static void cros_ec_proto_test_cmd_xfer_protocol_v3_no_op(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        int ret;
        struct cros_ec_command msg;

        memset(&msg, 0, sizeof(msg));

        ec_dev->proto_version = 3;
        ec_dev->cmd_xfer = cros_kunit_ec_cmd_xfer_mock;
        ec_dev->pkt_xfer = NULL;

        ret = cros_ec_cmd_xfer(ec_dev, &msg);
        KUNIT_EXPECT_EQ(test, ret, -EIO);
}

static void cros_ec_proto_test_cmd_xfer_protocol_v2_normal(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        int ret;
        struct cros_ec_command msg;

        memset(&msg, 0, sizeof(msg));

        ec_dev->proto_version = 2;
        ec_dev->cmd_xfer = cros_kunit_ec_cmd_xfer_mock;
        ec_dev->pkt_xfer = cros_kunit_ec_pkt_xfer_mock;

        ret = cros_ec_cmd_xfer(ec_dev, &msg);
        KUNIT_EXPECT_EQ(test, ret, 0);

        KUNIT_EXPECT_EQ(test, cros_kunit_ec_cmd_xfer_mock_called, 1);
        KUNIT_EXPECT_EQ(test, cros_kunit_ec_pkt_xfer_mock_called, 0);
}

static void cros_ec_proto_test_cmd_xfer_protocol_v2_no_op(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        int ret;
        struct cros_ec_command msg;

        memset(&msg, 0, sizeof(msg));

        ec_dev->proto_version = 2;
        ec_dev->cmd_xfer = NULL;
        ec_dev->pkt_xfer = cros_kunit_ec_pkt_xfer_mock;

        ret = cros_ec_cmd_xfer(ec_dev, &msg);
        KUNIT_EXPECT_EQ(test, ret, -EIO);
}

static void cros_ec_proto_test_cmd_xfer_in_progress_normal(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        struct cros_ec_command msg;

        memset(&msg, 0, sizeof(msg));

        ec_dev->pkt_xfer = cros_kunit_ec_pkt_xfer_mock;

        /* For the first host command to return EC_RES_IN_PROGRESS. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_IN_PROGRESS, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For EC_CMD_GET_COMMS_STATUS. */
        {
                struct ec_response_get_comms_status *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (struct ec_response_get_comms_status *)mock->o_data;
                data->flags = 0;
        }

        ret = cros_ec_cmd_xfer(ec_dev, &msg);
        KUNIT_EXPECT_EQ(test, ret, sizeof(struct ec_response_get_comms_status));

        KUNIT_EXPECT_EQ(test, msg.result, EC_RES_SUCCESS);

        /* For the first host command to return EC_RES_IN_PROGRESS. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);
        }

        /* For EC_CMD_GET_COMMS_STATUS. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_COMMS_STATUS);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_comms_status));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }

        KUNIT_EXPECT_EQ(test, cros_kunit_ec_pkt_xfer_mock_called, 2);
}

static void cros_ec_proto_test_cmd_xfer_in_progress_retries_eagain(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        struct cros_ec_command msg;

        memset(&msg, 0, sizeof(msg));

        ec_dev->pkt_xfer = cros_kunit_ec_pkt_xfer_mock;

        /* For the first host command to return EC_RES_IN_PROGRESS. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_IN_PROGRESS, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For EC_CMD_GET_COMMS_STATUS EC_COMMAND_RETRIES times. */
        cros_kunit_ec_xfer_mock_default_ret = -EAGAIN;

        ret = cros_ec_cmd_xfer(ec_dev, &msg);
        KUNIT_EXPECT_EQ(test, ret, -EAGAIN);

        /* For EC_CMD_GET_COMMS_STATUS EC_COMMAND_RETRIES times. */
        KUNIT_EXPECT_EQ(test, cros_kunit_ec_pkt_xfer_mock_called, 51);
}

static void cros_ec_proto_test_cmd_xfer_in_progress_retries_status_processing(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        struct cros_ec_command msg;

        memset(&msg, 0, sizeof(msg));

        ec_dev->pkt_xfer = cros_kunit_ec_pkt_xfer_mock;

        /* For the first host command to return EC_RES_IN_PROGRESS. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_IN_PROGRESS, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For EC_CMD_GET_COMMS_STATUS EC_COMMAND_RETRIES times. */
        {
                struct ec_response_get_comms_status *data;
                int i;

                for (i = 0; i < 50; ++i) {
                        mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                        KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                        data = (struct ec_response_get_comms_status *)mock->o_data;
                        data->flags |= EC_COMMS_STATUS_PROCESSING;
                }
        }

        ret = cros_ec_cmd_xfer(ec_dev, &msg);
        KUNIT_EXPECT_EQ(test, ret, -EAGAIN);

        /* For EC_CMD_GET_COMMS_STATUS EC_COMMAND_RETRIES times. */
        KUNIT_EXPECT_EQ(test, cros_kunit_ec_pkt_xfer_mock_called, 51);
}

static void cros_ec_proto_test_cmd_xfer_in_progress_xfer_error(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        struct cros_ec_command msg;

        memset(&msg, 0, sizeof(msg));

        /* For the first host command to return EC_RES_IN_PROGRESS. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_IN_PROGRESS, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For EC_CMD_GET_COMMS_STATUS. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, -EIO, EC_RES_SUCCESS, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        ret = cros_ec_cmd_xfer(ec_dev, &msg);
        KUNIT_EXPECT_EQ(test, ret, -EIO);
}

static void cros_ec_proto_test_cmd_xfer_in_progress_return_error(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        struct cros_ec_command msg;

        memset(&msg, 0, sizeof(msg));

        ec_dev->pkt_xfer = cros_kunit_ec_pkt_xfer_mock;

        /* For the first host command to return EC_RES_IN_PROGRESS. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_IN_PROGRESS, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For EC_CMD_GET_COMMS_STATUS. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        ret = cros_ec_cmd_xfer(ec_dev, &msg);
        KUNIT_EXPECT_EQ(test, ret, 0);

        KUNIT_EXPECT_EQ(test, msg.result, EC_RES_INVALID_COMMAND);

        KUNIT_EXPECT_EQ(test, cros_kunit_ec_pkt_xfer_mock_called, 2);
}

static void cros_ec_proto_test_cmd_xfer_in_progress_return0(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        struct cros_ec_command msg;

        memset(&msg, 0, sizeof(msg));

        ec_dev->pkt_xfer = cros_kunit_ec_pkt_xfer_mock;

        /* For the first host command to return EC_RES_IN_PROGRESS. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_IN_PROGRESS, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        /* For EC_CMD_GET_COMMS_STATUS. */
        {
                mock = cros_kunit_ec_xfer_mock_add(test, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        ret = cros_ec_cmd_xfer(ec_dev, &msg);
        KUNIT_EXPECT_EQ(test, ret, -EPROTO);

        KUNIT_EXPECT_EQ(test, cros_kunit_ec_pkt_xfer_mock_called, 2);
}

static void cros_ec_proto_test_cmd_xfer_status_normal(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        struct cros_ec_command msg;

        memset(&msg, 0, sizeof(msg));

        /* For cros_ec_cmd_xfer(). */
        {
                mock = cros_kunit_ec_xfer_mock_add(test, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        ret = cros_ec_cmd_xfer_status(ec_dev, &msg);
        KUNIT_EXPECT_EQ(test, ret, 0);
}

static void cros_ec_proto_test_cmd_xfer_status_xfer_error(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        struct cros_ec_command msg;

        memset(&msg, 0, sizeof(msg));

        /* For cros_ec_cmd_xfer(). */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, -EPROTO, EC_RES_SUCCESS, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        ret = cros_ec_cmd_xfer_status(ec_dev, &msg);
        KUNIT_EXPECT_EQ(test, ret, -EPROTO);
}

static void cros_ec_proto_test_cmd_xfer_status_return_error(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret, i;
        struct cros_ec_command msg;
        static const int map[] = {
                [EC_RES_SUCCESS] = 0,
                [EC_RES_INVALID_COMMAND] = -EOPNOTSUPP,
                [EC_RES_ERROR] = -EIO,
                [EC_RES_INVALID_PARAM] = -EINVAL,
                [EC_RES_ACCESS_DENIED] = -EACCES,
                [EC_RES_INVALID_RESPONSE] = -EPROTO,
                [EC_RES_INVALID_VERSION] = -ENOPROTOOPT,
                [EC_RES_INVALID_CHECKSUM] = -EBADMSG,
                /*
                 * EC_RES_IN_PROGRESS is special because cros_ec_send_command() has extra logic to
                 * handle it.  Note that default cros_kunit_ec_xfer_mock_default_ret == 0 thus
                 * cros_ec_xfer_command() in cros_ec_wait_until_complete() returns 0.  As a result,
                 * it returns -EPROTO without calling cros_ec_map_error().
                 */
                [EC_RES_IN_PROGRESS] = -EPROTO,
                [EC_RES_UNAVAILABLE] = -ENODATA,
                [EC_RES_TIMEOUT] = -ETIMEDOUT,
                [EC_RES_OVERFLOW] = -EOVERFLOW,
                [EC_RES_INVALID_HEADER] = -EBADR,
                [EC_RES_REQUEST_TRUNCATED] = -EBADR,
                [EC_RES_RESPONSE_TOO_BIG] = -EFBIG,
                [EC_RES_BUS_ERROR] = -EFAULT,
                [EC_RES_BUSY] = -EBUSY,
                [EC_RES_INVALID_HEADER_VERSION] = -EBADMSG,
                [EC_RES_INVALID_HEADER_CRC] = -EBADMSG,
                [EC_RES_INVALID_DATA_CRC] = -EBADMSG,
                [EC_RES_DUP_UNAVAILABLE] = -ENODATA,
        };

        memset(&msg, 0, sizeof(msg));

        for (i = 0; i < ARRAY_SIZE(map); ++i) {
                mock = cros_kunit_ec_xfer_mock_addx(test, 0, i, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                ret = cros_ec_cmd_xfer_status(ec_dev, &msg);
                KUNIT_EXPECT_EQ(test, ret, map[i]);
        }
}

static void cros_ec_proto_test_get_next_event_no_mkbp_event(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        bool wake_event, more_events;

        ec_dev->max_request = 0xff;
        ec_dev->max_response = 0xee;
        ec_dev->mkbp_event_supported = 0;

        /* Set some garbage bytes. */
        wake_event = false;
        more_events = true;

        /* For get_keyboard_state_event(). */
        {
                union ec_response_get_next_data_v3 *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (union ec_response_get_next_data_v3 *)mock->o_data;
                data->host_event = 0xbeef;
        }

        ret = cros_ec_get_next_event(ec_dev, &wake_event, &more_events);
        KUNIT_EXPECT_EQ(test, ret, sizeof(union ec_response_get_next_data_v3));

        KUNIT_EXPECT_EQ(test, ec_dev->event_data.event_type, EC_MKBP_EVENT_KEY_MATRIX);
        KUNIT_EXPECT_EQ(test, ec_dev->event_data.data.host_event, 0xbeef);

        KUNIT_EXPECT_TRUE(test, wake_event);
        KUNIT_EXPECT_FALSE(test, more_events);

        /* For get_keyboard_state_event(). */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_MKBP_STATE);
                KUNIT_EXPECT_EQ(test, mock->msg.insize, sizeof(union ec_response_get_next_data_v3));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }
}

static void cros_ec_proto_test_get_next_event_mkbp_event_ec_suspended(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        int ret;

        ec_dev->mkbp_event_supported = 1;
        ec_dev->suspended = true;

        ret = cros_ec_get_next_event(ec_dev, NULL, NULL);
        KUNIT_EXPECT_EQ(test, ret, -EHOSTDOWN);
}

static void cros_ec_proto_test_get_next_event_mkbp_event_version0(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        bool wake_event, more_events;

        ec_dev->max_request = 0xff;
        ec_dev->max_response = 0xee;
        ec_dev->mkbp_event_supported = 1;

        /* Set some garbage bytes. */
        wake_event = true;
        more_events = false;

        /* For get_next_event_xfer(). */
        {
                struct ec_response_get_next_event *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (struct ec_response_get_next_event *)mock->o_data;
                data->event_type = EC_MKBP_EVENT_SENSOR_FIFO | EC_MKBP_HAS_MORE_EVENTS;
                data->data.sysrq = 0xbeef;
        }

        ret = cros_ec_get_next_event(ec_dev, &wake_event, &more_events);
        KUNIT_EXPECT_EQ(test, ret, sizeof(struct ec_response_get_next_event));

        KUNIT_EXPECT_EQ(test, ec_dev->event_data.event_type, EC_MKBP_EVENT_SENSOR_FIFO);
        KUNIT_EXPECT_EQ(test, ec_dev->event_data.data.sysrq, 0xbeef);

        KUNIT_EXPECT_FALSE(test, wake_event);
        KUNIT_EXPECT_TRUE(test, more_events);

        /* For get_next_event_xfer(). */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_NEXT_EVENT);
                KUNIT_EXPECT_EQ(test, mock->msg.insize, sizeof(struct ec_response_get_next_event));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }
}

static void cros_ec_proto_test_get_next_event_mkbp_event_version2(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        bool wake_event, more_events;

        ec_dev->max_request = 0xff;
        ec_dev->max_response = 0xee;
        ec_dev->mkbp_event_supported = 3;

        /* Set some garbage bytes. */
        wake_event = false;
        more_events = true;

        /* For get_next_event_xfer(). */
        {
                struct ec_response_get_next_event_v1 *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (struct ec_response_get_next_event_v1 *)mock->o_data;
                data->event_type = EC_MKBP_EVENT_FINGERPRINT;
                data->data.sysrq = 0xbeef;
        }

        ret = cros_ec_get_next_event(ec_dev, &wake_event, &more_events);
        KUNIT_EXPECT_EQ(test, ret, sizeof(struct ec_response_get_next_event_v1));

        KUNIT_EXPECT_EQ(test, ec_dev->event_data.event_type, EC_MKBP_EVENT_FINGERPRINT);
        KUNIT_EXPECT_EQ(test, ec_dev->event_data.data.sysrq, 0xbeef);

        KUNIT_EXPECT_TRUE(test, wake_event);
        KUNIT_EXPECT_FALSE(test, more_events);

        /* For get_next_event_xfer(). */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 2);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_NEXT_EVENT);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_next_event_v1));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }
}

static void cros_ec_proto_test_get_next_event_mkbp_event_host_event_rtc(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        bool wake_event;
        struct ec_response_get_next_event_v1 *data;

        ec_dev->max_request = 0xff;
        ec_dev->max_response = 0xee;
        ec_dev->mkbp_event_supported = 3;
        ec_dev->host_event_wake_mask = U32_MAX;

        /* Set some garbage bytes. */
        wake_event = true;

        /* For get_next_event_xfer(). */
        {
                mock = cros_kunit_ec_xfer_mock_add(test,
                                                   sizeof(data->event_type) +
                                                   sizeof(data->data.host_event));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (struct ec_response_get_next_event_v1 *)mock->o_data;
                data->event_type = EC_MKBP_EVENT_HOST_EVENT;
                put_unaligned_le32(EC_HOST_EVENT_MASK(EC_HOST_EVENT_RTC), &data->data.host_event);
        }

        ret = cros_ec_get_next_event(ec_dev, &wake_event, NULL);
        KUNIT_EXPECT_EQ(test, ret, sizeof(data->event_type) + sizeof(data->data.host_event));

        KUNIT_EXPECT_EQ(test, ec_dev->event_data.event_type, EC_MKBP_EVENT_HOST_EVENT);

        KUNIT_EXPECT_FALSE(test, wake_event);

        /* For get_next_event_xfer(). */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 2);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_NEXT_EVENT);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_next_event_v1));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }
}

static void cros_ec_proto_test_get_next_event_mkbp_event_host_event_masked(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        bool wake_event;
        struct ec_response_get_next_event_v1 *data;

        ec_dev->max_request = 0xff;
        ec_dev->max_response = 0xee;
        ec_dev->mkbp_event_supported = 3;
        ec_dev->host_event_wake_mask = U32_MAX & ~EC_HOST_EVENT_MASK(EC_HOST_EVENT_AC_DISCONNECTED);

        /* Set some garbage bytes. */
        wake_event = true;

        /* For get_next_event_xfer(). */
        {
                mock = cros_kunit_ec_xfer_mock_add(test,
                                                   sizeof(data->event_type) +
                                                   sizeof(data->data.host_event));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (struct ec_response_get_next_event_v1 *)mock->o_data;
                data->event_type = EC_MKBP_EVENT_HOST_EVENT;
                put_unaligned_le32(EC_HOST_EVENT_MASK(EC_HOST_EVENT_AC_DISCONNECTED),
                                   &data->data.host_event);
        }

        ret = cros_ec_get_next_event(ec_dev, &wake_event, NULL);
        KUNIT_EXPECT_EQ(test, ret, sizeof(data->event_type) + sizeof(data->data.host_event));

        KUNIT_EXPECT_EQ(test, ec_dev->event_data.event_type, EC_MKBP_EVENT_HOST_EVENT);

        KUNIT_EXPECT_FALSE(test, wake_event);

        /* For get_next_event_xfer(). */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 2);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_NEXT_EVENT);
                KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                sizeof(struct ec_response_get_next_event_v1));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }
}

static void cros_ec_proto_test_get_host_event_no_mkbp_event(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        int ret;

        ec_dev->mkbp_event_supported = 0;

        ret = cros_ec_get_host_event(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, 0);
}

static void cros_ec_proto_test_get_host_event_not_host_event(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        int ret;

        ec_dev->mkbp_event_supported = 1;
        ec_dev->event_data.event_type = EC_MKBP_EVENT_FINGERPRINT;

        ret = cros_ec_get_host_event(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, 0);
}

static void cros_ec_proto_test_get_host_event_wrong_event_size(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        int ret;

        ec_dev->mkbp_event_supported = 1;
        ec_dev->event_data.event_type = EC_MKBP_EVENT_HOST_EVENT;
        ec_dev->event_size = 0xff;

        ret = cros_ec_get_host_event(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, 0);
}

static void cros_ec_proto_test_get_host_event_normal(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        int ret;

        ec_dev->mkbp_event_supported = 1;
        ec_dev->event_data.event_type = EC_MKBP_EVENT_HOST_EVENT;
        ec_dev->event_size = sizeof(ec_dev->event_data.data.host_event);
        put_unaligned_le32(EC_HOST_EVENT_MASK(EC_HOST_EVENT_RTC),
                           &ec_dev->event_data.data.host_event);

        ret = cros_ec_get_host_event(ec_dev);
        KUNIT_EXPECT_EQ(test, ret, EC_HOST_EVENT_MASK(EC_HOST_EVENT_RTC));
}

static void cros_ec_proto_test_check_features_cached(struct kunit *test)
{
        int ret, i;
        static struct cros_ec_dev ec;

        ec.features.flags[0] = EC_FEATURE_MASK_0(EC_FEATURE_FINGERPRINT);
        ec.features.flags[1] = EC_FEATURE_MASK_0(EC_FEATURE_SCP);

        for (i = 0; i < EC_FEATURE_TYPEC_MUX_REQUIRE_AP_ACK; ++i) {
                ret = cros_ec_check_features(&ec, i);
                switch (i) {
                case EC_FEATURE_FINGERPRINT:
                case EC_FEATURE_SCP:
                        KUNIT_EXPECT_TRUE(test, ret);
                        break;
                default:
                        KUNIT_EXPECT_FALSE(test, ret);
                        break;
                }
        }
}

static void cros_ec_proto_test_check_features_not_cached(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret, i;
        static struct cros_ec_dev ec;

        ec_dev->max_request = 0xff;
        ec_dev->max_response = 0xee;
        ec.ec_dev = ec_dev;
        ec.dev = ec_dev->dev;
        ec.cmd_offset = 0;
        ec.features.flags[0] = -1;
        ec.features.flags[1] = -1;

        /* For EC_CMD_GET_FEATURES. */
        {
                struct ec_response_get_features *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (struct ec_response_get_features *)mock->o_data;
                data->flags[0] = EC_FEATURE_MASK_0(EC_FEATURE_FINGERPRINT);
                data->flags[1] = EC_FEATURE_MASK_0(EC_FEATURE_SCP);
        }

        for (i = 0; i < EC_FEATURE_TYPEC_MUX_REQUIRE_AP_ACK; ++i) {
                ret = cros_ec_check_features(&ec, i);
                switch (i) {
                case EC_FEATURE_FINGERPRINT:
                case EC_FEATURE_SCP:
                        KUNIT_EXPECT_TRUE(test, ret);
                        break;
                default:
                        KUNIT_EXPECT_FALSE(test, ret);
                        break;
                }
        }

        /* For EC_CMD_GET_FEATURES. */
        {
                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_FEATURES);
                KUNIT_EXPECT_EQ(test, mock->msg.insize, sizeof(struct ec_response_get_features));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
        }
}

static void cros_ec_proto_test_get_sensor_count_normal(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        static struct cros_ec_dev ec;

        ec_dev->max_request = 0xff;
        ec_dev->max_response = 0xee;
        ec.ec_dev = ec_dev;
        ec.dev = ec_dev->dev;
        ec.cmd_offset = 0;

        /* For EC_CMD_MOTION_SENSE_CMD. */
        {
                struct ec_response_motion_sense *data;

                mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (struct ec_response_motion_sense *)mock->o_data;
                data->dump.sensor_count = 0xbf;
        }

        ret = cros_ec_get_sensor_count(&ec);
        KUNIT_EXPECT_EQ(test, ret, 0xbf);

        /* For EC_CMD_MOTION_SENSE_CMD. */
        {
                struct ec_params_motion_sense *data;

                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 1);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_MOTION_SENSE_CMD);
                KUNIT_EXPECT_EQ(test, mock->msg.insize, sizeof(struct ec_response_motion_sense));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(*data));

                data = (struct ec_params_motion_sense *)mock->i_data;
                KUNIT_EXPECT_EQ(test, data->cmd, MOTIONSENSE_CMD_DUMP);
        }
}

static void cros_ec_proto_test_get_sensor_count_xfer_error(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        static struct cros_ec_dev ec;

        ec_dev->max_request = 0xff;
        ec_dev->max_response = 0xee;
        ec.ec_dev = ec_dev;
        ec.dev = ec_dev->dev;
        ec.cmd_offset = 0;

        /* For EC_CMD_MOTION_SENSE_CMD. */
        {
                mock = cros_kunit_ec_xfer_mock_addx(test, -EPROTO, EC_RES_SUCCESS, 0);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);
        }

        ret = cros_ec_get_sensor_count(&ec);
        KUNIT_EXPECT_EQ(test, ret, -EPROTO);

        /* For EC_CMD_MOTION_SENSE_CMD. */
        {
                struct ec_params_motion_sense *data;

                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 1);
                KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_MOTION_SENSE_CMD);
                KUNIT_EXPECT_EQ(test, mock->msg.insize, sizeof(struct ec_response_motion_sense));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(*data));

                data = (struct ec_params_motion_sense *)mock->i_data;
                KUNIT_EXPECT_EQ(test, data->cmd, MOTIONSENSE_CMD_DUMP);
        }
}

static void cros_ec_proto_test_get_sensor_count_legacy(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret, i;
        static struct cros_ec_dev ec;
        struct {
                u8 readmem_data;
                int expected_result;
        } test_data[] = {
                { 0, 0 },
                { EC_MEMMAP_ACC_STATUS_PRESENCE_BIT, 2 },
        };

        ec_dev->max_request = 0xff;
        ec_dev->max_response = 0xee;
        ec_dev->cmd_readmem = cros_kunit_readmem_mock;
        ec.ec_dev = ec_dev;
        ec.dev = ec_dev->dev;
        ec.cmd_offset = 0;

        for (i = 0; i < ARRAY_SIZE(test_data); ++i) {
                /* For EC_CMD_MOTION_SENSE_CMD. */
                {
                        mock = cros_kunit_ec_xfer_mock_addx(test, -EPROTO, EC_RES_SUCCESS, 0);
                        KUNIT_ASSERT_PTR_NE(test, mock, NULL);
                }

                /* For readmem. */
                {
                        cros_kunit_readmem_mock_data = kunit_kzalloc(test, 1, GFP_KERNEL);
                        KUNIT_ASSERT_PTR_NE(test, cros_kunit_readmem_mock_data, NULL);
                        cros_kunit_readmem_mock_data[0] = test_data[i].readmem_data;

                        cros_kunit_ec_xfer_mock_default_ret = 1;
                }

                ret = cros_ec_get_sensor_count(&ec);
                KUNIT_EXPECT_EQ(test, ret, test_data[i].expected_result);

                /* For EC_CMD_MOTION_SENSE_CMD. */
                {
                        struct ec_params_motion_sense *data;

                        mock = cros_kunit_ec_xfer_mock_next();
                        KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                        KUNIT_EXPECT_EQ(test, mock->msg.version, 1);
                        KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_MOTION_SENSE_CMD);
                        KUNIT_EXPECT_EQ(test, mock->msg.insize,
                                        sizeof(struct ec_response_motion_sense));
                        KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(*data));

                        data = (struct ec_params_motion_sense *)mock->i_data;
                        KUNIT_EXPECT_EQ(test, data->cmd, MOTIONSENSE_CMD_DUMP);
                }

                /* For readmem. */
                {
                        KUNIT_EXPECT_EQ(test, cros_kunit_readmem_mock_offset, EC_MEMMAP_ACC_STATUS);
                }
        }
}

static void cros_ec_proto_test_ec_cmd(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;
        struct ec_xfer_mock *mock;
        int ret;
        u8 out[3], in[2];

        ec_dev->max_request = 0xff;
        ec_dev->max_response = 0xee;

        out[0] = 0xdd;
        out[1] = 0xcc;
        out[2] = 0xbb;

        {
                u8 *data;

                mock = cros_kunit_ec_xfer_mock_add(test, 2);
                KUNIT_ASSERT_PTR_NE(test, mock, NULL);

                data = (u8 *)mock->o_data;
                data[0] = 0xaa;
                data[1] = 0x99;
        }

        ret = cros_ec_cmd(ec_dev, 0x88, 0x77, out, ARRAY_SIZE(out), in, ARRAY_SIZE(in));
        KUNIT_EXPECT_EQ(test, ret, 2);

        {
                u8 *data;

                mock = cros_kunit_ec_xfer_mock_next();
                KUNIT_EXPECT_PTR_NE(test, mock, NULL);

                KUNIT_EXPECT_EQ(test, mock->msg.version, 0x88);
                KUNIT_EXPECT_EQ(test, mock->msg.command, 0x77);
                KUNIT_EXPECT_EQ(test, mock->msg.insize, ARRAY_SIZE(in));
                KUNIT_EXPECT_EQ(test, mock->msg.outsize, ARRAY_SIZE(out));

                data = (u8 *)mock->i_data;
                KUNIT_EXPECT_EQ(test, data[0], 0xdd);
                KUNIT_EXPECT_EQ(test, data[1], 0xcc);
                KUNIT_EXPECT_EQ(test, data[2], 0xbb);
        }
}

static void cros_ec_proto_test_release(struct device *dev)
{
}

static int cros_ec_proto_test_init(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv;
        struct cros_ec_device *ec_dev;

        priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL);
        if (!priv)
                return -ENOMEM;
        test->priv = priv;

        ec_dev = &priv->ec_dev;
        ec_dev->dout = (u8 *)priv->dout;
        ec_dev->dout_size = ARRAY_SIZE(priv->dout);
        ec_dev->din = (u8 *)priv->din;
        ec_dev->din_size = ARRAY_SIZE(priv->din);
        ec_dev->proto_version = EC_HOST_REQUEST_VERSION;
        ec_dev->dev = kunit_kzalloc(test, sizeof(*ec_dev->dev), GFP_KERNEL);
        if (!ec_dev->dev)
                return -ENOMEM;
        device_initialize(ec_dev->dev);
        dev_set_name(ec_dev->dev, "cros_ec_proto_test");
        ec_dev->dev->release = cros_ec_proto_test_release;
        ec_dev->cmd_xfer = cros_kunit_ec_xfer_mock;
        ec_dev->pkt_xfer = cros_kunit_ec_xfer_mock;
        mutex_init(&ec_dev->lock);

        priv->msg = (struct cros_ec_command *)priv->_msg;

        cros_kunit_mock_reset();

        return 0;
}

static void cros_ec_proto_test_exit(struct kunit *test)
{
        struct cros_ec_proto_test_priv *priv = test->priv;
        struct cros_ec_device *ec_dev = &priv->ec_dev;

        put_device(ec_dev->dev);
}

static struct kunit_case cros_ec_proto_test_cases[] = {
        KUNIT_CASE(cros_ec_proto_test_prepare_tx_legacy_normal),
        KUNIT_CASE(cros_ec_proto_test_prepare_tx_legacy_bad_msg_outsize),
        KUNIT_CASE(cros_ec_proto_test_prepare_tx_normal),
        KUNIT_CASE(cros_ec_proto_test_prepare_tx_bad_msg_outsize),
        KUNIT_CASE(cros_ec_proto_test_check_result),
        KUNIT_CASE(cros_ec_proto_test_query_all_normal),
        KUNIT_CASE(cros_ec_proto_test_query_all_no_pd_return_error),
        KUNIT_CASE(cros_ec_proto_test_query_all_no_pd_return0),
        KUNIT_CASE(cros_ec_proto_test_query_all_legacy_normal_v3_return_error),
        KUNIT_CASE(cros_ec_proto_test_query_all_legacy_normal_v3_return0),
        KUNIT_CASE(cros_ec_proto_test_query_all_legacy_xfer_error),
        KUNIT_CASE(cros_ec_proto_test_query_all_legacy_return_error),
        KUNIT_CASE(cros_ec_proto_test_query_all_legacy_data_error),
        KUNIT_CASE(cros_ec_proto_test_query_all_legacy_return0),
        KUNIT_CASE(cros_ec_proto_test_query_all_no_mkbp),
        KUNIT_CASE(cros_ec_proto_test_query_all_no_mkbp_return_error),
        KUNIT_CASE(cros_ec_proto_test_query_all_no_mkbp_return0),
        KUNIT_CASE(cros_ec_proto_test_query_all_no_host_sleep),
        KUNIT_CASE(cros_ec_proto_test_query_all_no_host_sleep_return0),
        KUNIT_CASE(cros_ec_proto_test_query_all_default_wake_mask_return_error),
        KUNIT_CASE(cros_ec_proto_test_query_all_default_wake_mask_return0),
        KUNIT_CASE(cros_ec_proto_test_cmd_xfer_normal),
        KUNIT_CASE(cros_ec_proto_test_cmd_xfer_excess_msg_insize),
        KUNIT_CASE(cros_ec_proto_test_cmd_xfer_excess_msg_outsize_without_passthru),
        KUNIT_CASE(cros_ec_proto_test_cmd_xfer_excess_msg_outsize_with_passthru),
        KUNIT_CASE(cros_ec_proto_test_cmd_xfer_protocol_v3_normal),
        KUNIT_CASE(cros_ec_proto_test_cmd_xfer_protocol_v3_no_op),
        KUNIT_CASE(cros_ec_proto_test_cmd_xfer_protocol_v2_normal),
        KUNIT_CASE(cros_ec_proto_test_cmd_xfer_protocol_v2_no_op),
        KUNIT_CASE(cros_ec_proto_test_cmd_xfer_in_progress_normal),
        KUNIT_CASE(cros_ec_proto_test_cmd_xfer_in_progress_retries_eagain),
        KUNIT_CASE(cros_ec_proto_test_cmd_xfer_in_progress_retries_status_processing),
        KUNIT_CASE(cros_ec_proto_test_cmd_xfer_in_progress_xfer_error),
        KUNIT_CASE(cros_ec_proto_test_cmd_xfer_in_progress_return_error),
        KUNIT_CASE(cros_ec_proto_test_cmd_xfer_in_progress_return0),
        KUNIT_CASE(cros_ec_proto_test_cmd_xfer_status_normal),
        KUNIT_CASE(cros_ec_proto_test_cmd_xfer_status_xfer_error),
        KUNIT_CASE(cros_ec_proto_test_cmd_xfer_status_return_error),
        KUNIT_CASE(cros_ec_proto_test_get_next_event_no_mkbp_event),
        KUNIT_CASE(cros_ec_proto_test_get_next_event_mkbp_event_ec_suspended),
        KUNIT_CASE(cros_ec_proto_test_get_next_event_mkbp_event_version0),
        KUNIT_CASE(cros_ec_proto_test_get_next_event_mkbp_event_version2),
        KUNIT_CASE(cros_ec_proto_test_get_next_event_mkbp_event_host_event_rtc),
        KUNIT_CASE(cros_ec_proto_test_get_next_event_mkbp_event_host_event_masked),
        KUNIT_CASE(cros_ec_proto_test_get_host_event_no_mkbp_event),
        KUNIT_CASE(cros_ec_proto_test_get_host_event_not_host_event),
        KUNIT_CASE(cros_ec_proto_test_get_host_event_wrong_event_size),
        KUNIT_CASE(cros_ec_proto_test_get_host_event_normal),
        KUNIT_CASE(cros_ec_proto_test_check_features_cached),
        KUNIT_CASE(cros_ec_proto_test_check_features_not_cached),
        KUNIT_CASE(cros_ec_proto_test_get_sensor_count_normal),
        KUNIT_CASE(cros_ec_proto_test_get_sensor_count_xfer_error),
        KUNIT_CASE(cros_ec_proto_test_get_sensor_count_legacy),
        KUNIT_CASE(cros_ec_proto_test_ec_cmd),
        {}
};

static struct kunit_suite cros_ec_proto_test_suite = {
        .name = "cros_ec_proto_test",
        .init = cros_ec_proto_test_init,
        .exit = cros_ec_proto_test_exit,
        .test_cases = cros_ec_proto_test_cases,
};

kunit_test_suite(cros_ec_proto_test_suite);

MODULE_DESCRIPTION("Kunit tests for ChromeOS Embedded Controller protocol");
MODULE_LICENSE("GPL");