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authorMichał Mirosław2020-05-17 20:41:05 -0700
committerDmitry Torokhov2020-05-17 21:11:34 -0700
commit918e2844d940da7c624262a7aa327615d3eb5abd (patch)
treef9f8f91b6a8495f1cc839a211a87f3ad456c7c0c /drivers/input
parent68334dbab13bc5d637fdf1aa2ccfe7e1932b2af1 (diff)
Input: elants - refactor elants_i2c_execute_command()
Apply some DRY-ing to elants_i2c_execute_command() callers. This pulls polling and error printk()s into a single function. Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Link: https://lore.kernel.org/r/6c576f688b385235c65b461410a917080d27e825.1587923061.git.mirq-linux@rere.qmqm.pl Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/touchscreen/elants_i2c.c200
1 files changed, 99 insertions, 101 deletions
diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c
index ccaef4031556..233cb1085bbd 100644
--- a/drivers/input/touchscreen/elants_i2c.c
+++ b/drivers/input/touchscreen/elants_i2c.c
@@ -192,7 +192,8 @@ static int elants_i2c_read(struct i2c_client *client, void *data, size_t size)
static int elants_i2c_execute_command(struct i2c_client *client,
const u8 *cmd, size_t cmd_size,
- u8 *resp, size_t resp_size)
+ u8 *resp, size_t resp_size,
+ int retries, const char *cmd_name)
{
struct i2c_msg msgs[2];
int ret;
@@ -212,30 +213,55 @@ static int elants_i2c_execute_command(struct i2c_client *client,
break;
default:
- dev_err(&client->dev, "%s: invalid command %*ph\n",
- __func__, (int)cmd_size, cmd);
+ dev_err(&client->dev, "(%s): invalid command: %*ph\n",
+ cmd_name, (int)cmd_size, cmd);
return -EINVAL;
}
- msgs[0].addr = client->addr;
- msgs[0].flags = client->flags & I2C_M_TEN;
- msgs[0].len = cmd_size;
- msgs[0].buf = (u8 *)cmd;
+ for (;;) {
+ msgs[0].addr = client->addr;
+ msgs[0].flags = client->flags & I2C_M_TEN;
+ msgs[0].len = cmd_size;
+ msgs[0].buf = (u8 *)cmd;
+
+ msgs[1].addr = client->addr;
+ msgs[1].flags = (client->flags & I2C_M_TEN) | I2C_M_RD;
+ msgs[1].flags |= I2C_M_RD;
+ msgs[1].len = resp_size;
+ msgs[1].buf = resp;
+
+ ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+ if (ret < 0) {
+ if (--retries > 0) {
+ dev_dbg(&client->dev,
+ "(%s) I2C transfer failed: %pe (retrying)\n",
+ cmd_name, ERR_PTR(ret));
+ continue;
+ }
- msgs[1].addr = client->addr;
- msgs[1].flags = client->flags & I2C_M_TEN;
- msgs[1].flags |= I2C_M_RD;
- msgs[1].len = resp_size;
- msgs[1].buf = resp;
+ dev_err(&client->dev,
+ "(%s) I2C transfer failed: %pe\n",
+ cmd_name, ERR_PTR(ret));
+ return ret;
+ }
- ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
- if (ret < 0)
- return ret;
+ if (ret != ARRAY_SIZE(msgs) ||
+ resp[FW_HDR_TYPE] != expected_response) {
+ if (--retries > 0) {
+ dev_dbg(&client->dev,
+ "(%s) unexpected response: %*ph (retrying)\n",
+ cmd_name, ret, resp);
+ continue;
+ }
- if (ret != ARRAY_SIZE(msgs) || resp[FW_HDR_TYPE] != expected_response)
- return -EIO;
+ dev_err(&client->dev,
+ "(%s) unexpected response: %*ph\n",
+ cmd_name, ret, resp);
+ return -EIO;
+ }
- return 0;
+ return 0;
+ }
}
static int elants_i2c_calibrate(struct elants_data *ts)
@@ -308,27 +334,21 @@ static u16 elants_i2c_parse_version(u8 *buf)
static int elants_i2c_query_hw_version(struct elants_data *ts)
{
struct i2c_client *client = ts->client;
- int error, retry_cnt;
+ int retry_cnt = MAX_RETRIES;
const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_FW_ID, 0x00, 0x01 };
u8 resp[HEADER_SIZE];
+ int error;
- for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) {
+ while (retry_cnt--) {
error = elants_i2c_execute_command(client, cmd, sizeof(cmd),
- resp, sizeof(resp));
- if (!error) {
- ts->hw_version = elants_i2c_parse_version(resp);
- if (ts->hw_version != 0xffff)
- return 0;
- }
-
- dev_dbg(&client->dev, "read fw id error=%d, buf=%*phC\n",
- error, (int)sizeof(resp), resp);
- }
+ resp, sizeof(resp), 1,
+ "read fw id");
+ if (error)
+ return error;
- if (error) {
- dev_err(&client->dev,
- "Failed to read fw id: %d\n", error);
- return error;
+ ts->hw_version = elants_i2c_parse_version(resp);
+ if (ts->hw_version != 0xffff)
+ return 0;
}
dev_err(&client->dev, "Invalid fw id: %#04x\n", ts->hw_version);
@@ -339,26 +359,27 @@ static int elants_i2c_query_hw_version(struct elants_data *ts)
static int elants_i2c_query_fw_version(struct elants_data *ts)
{
struct i2c_client *client = ts->client;
- int error, retry_cnt;
+ int retry_cnt = MAX_RETRIES;
const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_FW_VER, 0x00, 0x01 };
u8 resp[HEADER_SIZE];
+ int error;
- for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) {
+ while (retry_cnt--) {
error = elants_i2c_execute_command(client, cmd, sizeof(cmd),
- resp, sizeof(resp));
- if (!error) {
- ts->fw_version = elants_i2c_parse_version(resp);
- if (ts->fw_version != 0x0000 &&
- ts->fw_version != 0xffff)
- return 0;
- }
+ resp, sizeof(resp), 1,
+ "read fw version");
+ if (error)
+ return error;
+
+ ts->fw_version = elants_i2c_parse_version(resp);
+ if (ts->fw_version != 0x0000 && ts->fw_version != 0xffff)
+ return 0;
- dev_dbg(&client->dev, "read fw version error=%d, buf=%*phC\n",
- error, (int)sizeof(resp), resp);
+ dev_dbg(&client->dev, "(read fw version) resp %*phC\n",
+ (int)sizeof(resp), resp);
}
- dev_err(&client->dev,
- "Failed to read fw version or fw version is invalid\n");
+ dev_err(&client->dev, "Invalid fw ver: %#04x\n", ts->fw_version);
return -EINVAL;
}
@@ -366,30 +387,24 @@ static int elants_i2c_query_fw_version(struct elants_data *ts)
static int elants_i2c_query_test_version(struct elants_data *ts)
{
struct i2c_client *client = ts->client;
- int error, retry_cnt;
+ int error;
u16 version;
const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_TEST_VER, 0x00, 0x01 };
u8 resp[HEADER_SIZE];
- for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) {
- error = elants_i2c_execute_command(client, cmd, sizeof(cmd),
- resp, sizeof(resp));
- if (!error) {
- version = elants_i2c_parse_version(resp);
- ts->test_version = version >> 8;
- ts->solution_version = version & 0xff;
-
- return 0;
- }
-
- dev_dbg(&client->dev,
- "read test version error rc=%d, buf=%*phC\n",
- error, (int)sizeof(resp), resp);
+ error = elants_i2c_execute_command(client, cmd, sizeof(cmd),
+ resp, sizeof(resp), MAX_RETRIES,
+ "read test version");
+ if (error) {
+ dev_err(&client->dev, "Failed to read test version\n");
+ return error;
}
- dev_err(&client->dev, "Failed to read test version\n");
+ version = elants_i2c_parse_version(resp);
+ ts->test_version = version >> 8;
+ ts->solution_version = version & 0xff;
- return -EINVAL;
+ return 0;
}
static int elants_i2c_query_bc_version(struct elants_data *ts)
@@ -401,13 +416,10 @@ static int elants_i2c_query_bc_version(struct elants_data *ts)
int error;
error = elants_i2c_execute_command(client, cmd, sizeof(cmd),
- resp, sizeof(resp));
- if (error) {
- dev_err(&client->dev,
- "read BC version error=%d, buf=%*phC\n",
- error, (int)sizeof(resp), resp);
+ resp, sizeof(resp), 1,
+ "read BC version");
+ if (error)
return error;
- }
version = elants_i2c_parse_version(resp);
ts->bc_version = version >> 8;
@@ -439,12 +451,10 @@ static int elants_i2c_query_ts_info(struct elants_data *ts)
error = elants_i2c_execute_command(client,
get_resolution_cmd,
sizeof(get_resolution_cmd),
- resp, sizeof(resp));
- if (error) {
- dev_err(&client->dev, "get resolution command failed: %d\n",
- error);
+ resp, sizeof(resp), 1,
+ "get resolution");
+ if (error)
return error;
- }
rows = resp[2] + resp[6] + resp[10];
cols = resp[3] + resp[7] + resp[11];
@@ -452,36 +462,29 @@ static int elants_i2c_query_ts_info(struct elants_data *ts)
/* Process mm_to_pixel information */
error = elants_i2c_execute_command(client,
get_osr_cmd, sizeof(get_osr_cmd),
- resp, sizeof(resp));
- if (error) {
- dev_err(&client->dev, "get osr command failed: %d\n",
- error);
+ resp, sizeof(resp), 1, "get osr");
+ if (error)
return error;
- }
osr = resp[3];
error = elants_i2c_execute_command(client,
get_physical_scan_cmd,
sizeof(get_physical_scan_cmd),
- resp, sizeof(resp));
- if (error) {
- dev_err(&client->dev, "get physical scan command failed: %d\n",
- error);
+ resp, sizeof(resp), 1,
+ "get physical scan");
+ if (error)
return error;
- }
phy_x = get_unaligned_be16(&resp[2]);
error = elants_i2c_execute_command(client,
get_physical_drive_cmd,
sizeof(get_physical_drive_cmd),
- resp, sizeof(resp));
- if (error) {
- dev_err(&client->dev, "get physical drive command failed: %d\n",
- error);
+ resp, sizeof(resp), 1,
+ "get physical drive");
+ if (error)
return error;
- }
phy_y = get_unaligned_be16(&resp[2]);
@@ -636,11 +639,10 @@ static int elants_i2c_validate_remark_id(struct elants_data *ts,
/* Compare TS Remark ID and FW Remark ID */
error = elants_i2c_execute_command(client, cmd, sizeof(cmd),
- resp, sizeof(resp));
- if (error) {
- dev_err(&client->dev, "failed to query Remark ID: %d\n", error);
+ resp, sizeof(resp),
+ 1, "read Remark ID");
+ if (error)
return error;
- }
ts_remark_id = get_unaligned_be16(&resp[3]);
@@ -1075,16 +1077,12 @@ static ssize_t show_calibration_count(struct device *dev,
int error;
error = elants_i2c_execute_command(client, cmd, sizeof(cmd),
- resp, sizeof(resp));
- if (error) {
- dev_err(&client->dev,
- "read ReK status error=%d, buf=%*phC\n",
- error, (int)sizeof(resp), resp);
+ resp, sizeof(resp), 1,
+ "read ReK status");
+ if (error)
return sprintf(buf, "%d\n", error);
- }
rek_count = get_unaligned_be16(&resp[2]);
-
return sprintf(buf, "0x%04x\n", rek_count);
}