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Input: elants_i2c - get product id on recovery mode for FW update

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We use hw version to construct name of file holding touchscreen firmware,
so let's try reading it even if touchscreen initialization fails (the
firmware supports reading product/hardware id even when device is in
recovery/boot mode).

Signed-off-by: Johnny Chuang <johnny.chuang@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Johnny Chuang 2016-08-25 09:26:53 -07:00 committed by Dmitry Torokhov
parent c9a3a7cf95
commit bc1d57fe5f
1 changed files with 20 additions and 11 deletions
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31
drivers/input/touchscreen/elants_i2c.c
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@ -298,7 +298,7 @@ static u16 elants_i2c_parse_version(u8 *buf)
return get_unaligned_be32(buf) >> 4;
}
static int elants_i2c_query_fw_id(struct elants_data *ts)
static int elants_i2c_query_hw_version(struct elants_data *ts)
{
struct i2c_client *client = ts->client;
int error, retry_cnt;
@ -318,8 +318,13 @@ static int elants_i2c_query_fw_id(struct elants_data *ts)
error, (int)sizeof(resp), resp);
}
dev_err(&client->dev,
"Failed to read fw id or fw id is invalid\n");
if (error) {
dev_err(&client->dev,
"Failed to read fw id: %d\n", error);
return error;
}
dev_err(&client->dev, "Invalid fw id: %#04x\n", ts->hw_version);
return -EINVAL;
}
@ -508,7 +513,7 @@ static int elants_i2c_fastboot(struct i2c_client *client)
static int elants_i2c_initialize(struct elants_data *ts)
{
struct i2c_client *client = ts->client;
int error, retry_cnt;
int error, error2, retry_cnt;
const u8 hello_packet[] = { 0x55, 0x55, 0x55, 0x55 };
const u8 recov_packet[] = { 0x55, 0x55, 0x80, 0x80 };
u8 buf[HEADER_SIZE];
@ -553,18 +558,22 @@ static int elants_i2c_initialize(struct elants_data *ts)
}
}
/* hw version is available even if device in recovery state */
error2 = elants_i2c_query_hw_version(ts);
if (!error)
error = elants_i2c_query_fw_id(ts);
error = error2;
if (!error)
error = elants_i2c_query_fw_version(ts);
if (!error)
error = elants_i2c_query_test_version(ts);
if (!error)
error = elants_i2c_query_bc_version(ts);
if (!error)
error = elants_i2c_query_ts_info(ts);
if (error) {
if (error)
ts->iap_mode = ELAN_IAP_RECOVERY;
} else {
elants_i2c_query_test_version(ts);
elants_i2c_query_bc_version(ts);
elants_i2c_query_ts_info(ts);
}
return 0;
}