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Subject[PATCH v3 10/23] platform/chrome: cros_ec_proto: separate cros_ec_get_proto_info_legacy()
Date
Rename cros_ec_host_command_proto_query_v2() to
cros_ec_get_proto_info_legacy() and make it responsible for setting
`ec_dev` fields for EC protocol v2.

Reviewed-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
---
Changes from v2:
- Add R-b tag.

Changes from v1:
- Preserve the "cros_ec_" prefix.

drivers/platform/chrome/cros_ec_proto.c | 72 +++++++++-----------
drivers/platform/chrome/cros_ec_proto_test.c | 22 +++---
2 files changed, 44 insertions(+), 50 deletions(-)

diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
index 6f5be9e5ede4..04b9704ed302 100644
--- a/drivers/platform/chrome/cros_ec_proto.c
+++ b/drivers/platform/chrome/cros_ec_proto.c
@@ -351,51 +351,57 @@ static int cros_ec_get_proto_info(struct cros_ec_device *ec_dev, int devidx)
return ret;
}

-static int cros_ec_host_command_proto_query_v2(struct cros_ec_device *ec_dev)
+static int cros_ec_get_proto_info_legacy(struct cros_ec_device *ec_dev)
{
struct cros_ec_command *msg;
- struct ec_params_hello *hello_params;
- struct ec_response_hello *hello_response;
+ struct ec_params_hello *params;
+ struct ec_response_hello *response;
int ret;
- int len = max(sizeof(*hello_params), sizeof(*hello_response));

- msg = kmalloc(sizeof(*msg) + len, GFP_KERNEL);
+ ec_dev->proto_version = 2;
+
+ msg = kzalloc(sizeof(*msg) + max(sizeof(*params), sizeof(*response)), GFP_KERNEL);
if (!msg)
return -ENOMEM;

- msg->version = 0;
msg->command = EC_CMD_HELLO;
- hello_params = (struct ec_params_hello *)msg->data;
- msg->outsize = sizeof(*hello_params);
- hello_response = (struct ec_response_hello *)msg->data;
- msg->insize = sizeof(*hello_response);
+ msg->insize = sizeof(*response);
+ msg->outsize = sizeof(*params);

- hello_params->in_data = 0xa0b0c0d0;
+ params = (struct ec_params_hello *)msg->data;
+ params->in_data = 0xa0b0c0d0;

ret = send_command(ec_dev, msg);
-
if (ret < 0) {
- dev_dbg(ec_dev->dev,
- "EC failed to respond to v2 hello: %d\n",
- ret);
+ dev_dbg(ec_dev->dev, "EC failed to respond to v2 hello: %d\n", ret);
goto exit;
- } else if (msg->result != EC_RES_SUCCESS) {
- dev_err(ec_dev->dev,
- "EC responded to v2 hello with error: %d\n",
- msg->result);
- ret = msg->result;
+ }
+
+ ret = cros_ec_map_error(msg->result);
+ if (ret) {
+ dev_err(ec_dev->dev, "EC responded to v2 hello with error: %d\n", msg->result);
goto exit;
- } else if (hello_response->out_data != 0xa1b2c3d4) {
+ }
+
+ response = (struct ec_response_hello *)msg->data;
+ if (response->out_data != 0xa1b2c3d4) {
dev_err(ec_dev->dev,
"EC responded to v2 hello with bad result: %u\n",
- hello_response->out_data);
+ response->out_data);
ret = -EBADMSG;
goto exit;
}

- ret = 0;
+ ec_dev->max_request = EC_PROTO2_MAX_PARAM_SIZE;
+ ec_dev->max_response = EC_PROTO2_MAX_PARAM_SIZE;
+ ec_dev->max_passthru = 0;
+ ec_dev->pkt_xfer = NULL;
+ ec_dev->din_size = EC_PROTO2_MSG_BYTES;
+ ec_dev->dout_size = EC_PROTO2_MSG_BYTES;

- exit:
+ dev_dbg(ec_dev->dev, "falling back to proto v2\n");
+ ret = 0;
+exit:
kfree(msg);
return ret;
}
@@ -467,20 +473,8 @@ int cros_ec_query_all(struct cros_ec_device *ec_dev)
cros_ec_get_proto_info(ec_dev, CROS_EC_DEV_PD_INDEX);
} else {
/* Try querying with a v2 hello message. */
- ec_dev->proto_version = 2;
- ret = cros_ec_host_command_proto_query_v2(ec_dev);
-
- if (ret == 0) {
- /* V2 hello succeeded. */
- dev_dbg(ec_dev->dev, "falling back to proto v2\n");
-
- ec_dev->max_request = EC_PROTO2_MAX_PARAM_SIZE;
- ec_dev->max_response = EC_PROTO2_MAX_PARAM_SIZE;
- ec_dev->max_passthru = 0;
- ec_dev->pkt_xfer = NULL;
- ec_dev->din_size = EC_PROTO2_MSG_BYTES;
- ec_dev->dout_size = EC_PROTO2_MSG_BYTES;
- } else {
+ ret = cros_ec_get_proto_info_legacy(ec_dev);
+ if (ret) {
/*
* It's possible for a test to occur too early when
* the EC isn't listening. If this happens, we'll
@@ -488,7 +482,7 @@ int cros_ec_query_all(struct cros_ec_device *ec_dev)
*/
ec_dev->proto_version = EC_PROTO_VERSION_UNKNOWN;
dev_dbg(ec_dev->dev, "EC query failed: %d\n", ret);
- goto exit;
+ return ret;
}
}

diff --git a/drivers/platform/chrome/cros_ec_proto_test.c b/drivers/platform/chrome/cros_ec_proto_test.c
index 1378ac90e1cb..8e47cb70dc8b 100644
--- a/drivers/platform/chrome/cros_ec_proto_test.c
+++ b/drivers/platform/chrome/cros_ec_proto_test.c
@@ -485,7 +485,7 @@ static void cros_ec_proto_test_query_all_legacy_normal_v3_return_error(struct ku
KUNIT_ASSERT_PTR_NE(test, mock, NULL);
}

- /* For cros_ec_host_command_proto_query_v2(). */
+ /* For cros_ec_get_proto_info_legacy(). */
{
struct ec_response_hello *data;

@@ -512,7 +512,7 @@ static void cros_ec_proto_test_query_all_legacy_normal_v3_return_error(struct ku
KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
}

- /* For cros_ec_host_command_proto_query_v2(). */
+ /* For cros_ec_get_proto_info_legacy(). */
{
struct ec_params_hello *data;

@@ -550,7 +550,7 @@ static void cros_ec_proto_test_query_all_legacy_normal_v3_return0(struct kunit *
KUNIT_ASSERT_PTR_NE(test, mock, NULL);
}

- /* For cros_ec_host_command_proto_query_v2(). */
+ /* For cros_ec_get_proto_info_legacy(). */
{
struct ec_response_hello *data;

@@ -577,7 +577,7 @@ static void cros_ec_proto_test_query_all_legacy_normal_v3_return0(struct kunit *
KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
}

- /* For cros_ec_host_command_proto_query_v2(). */
+ /* For cros_ec_get_proto_info_legacy(). */
{
struct ec_params_hello *data;

@@ -615,7 +615,7 @@ static void cros_ec_proto_test_query_all_legacy_xfer_error(struct kunit *test)
KUNIT_ASSERT_PTR_NE(test, mock, NULL);
}

- /* For cros_ec_host_command_proto_query_v2(). */
+ /* 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);
@@ -638,7 +638,7 @@ static void cros_ec_proto_test_query_all_legacy_xfer_error(struct kunit *test)
KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
}

- /* For cros_ec_host_command_proto_query_v2(). */
+ /* For cros_ec_get_proto_info_legacy(). */
{
mock = cros_kunit_ec_xfer_mock_next();
KUNIT_EXPECT_PTR_NE(test, mock, NULL);
@@ -663,7 +663,7 @@ static void cros_ec_proto_test_query_all_legacy_return_error(struct kunit *test)
KUNIT_ASSERT_PTR_NE(test, mock, NULL);
}

- /* For cros_ec_host_command_proto_query_v2(). */
+ /* 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);
@@ -671,7 +671,7 @@ static void cros_ec_proto_test_query_all_legacy_return_error(struct kunit *test)

cros_ec_proto_test_query_all_pretest(test);
ret = cros_ec_query_all(ec_dev);
- KUNIT_EXPECT_EQ(test, ret, EC_RES_INVALID_COMMAND);
+ 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. */
@@ -686,7 +686,7 @@ static void cros_ec_proto_test_query_all_legacy_return_error(struct kunit *test)
KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
}

- /* For cros_ec_host_command_proto_query_v2(). */
+ /* For cros_ec_get_proto_info_legacy(). */
{
mock = cros_kunit_ec_xfer_mock_next();
KUNIT_EXPECT_PTR_NE(test, mock, NULL);
@@ -711,7 +711,7 @@ static void cros_ec_proto_test_query_all_legacy_data_error(struct kunit *test)
KUNIT_ASSERT_PTR_NE(test, mock, NULL);
}

- /* For cros_ec_host_command_proto_query_v2(). */
+ /* For cros_ec_get_proto_info_legacy(). */
{
struct ec_response_hello *data;

@@ -739,7 +739,7 @@ static void cros_ec_proto_test_query_all_legacy_data_error(struct kunit *test)
KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
}

- /* For cros_ec_host_command_proto_query_v2(). */
+ /* For cros_ec_get_proto_info_legacy(). */
{
mock = cros_kunit_ec_xfer_mock_next();
KUNIT_EXPECT_PTR_NE(test, mock, NULL);
--
2.36.1.255.ge46751e96f-goog
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