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authorJohnny Chuang <johnny.chuang@emc.com.tw>2016-08-25 09:26:53 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2016-08-25 10:11:31 -0700
commitbc1d57fe5ff7574e6cf1d53bd88edbd87e127420 (patch)
tree7708056bfba6ea2dc09e9ef0dcc0bea61eeaa229 /drivers/input
parentc9a3a7cf95d8429c5db0fc98758c21f8fefb38fa (diff)
downloadlinux-bc1d57fe5ff7574e6cf1d53bd88edbd87e127420.tar.bz2
Input: elants_i2c - get product id on recovery mode for FW update
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>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/touchscreen/elants_i2c.c31
1 files changed, 20 insertions, 11 deletions
diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c
index ac09855fa435..02aec284deca 100644
--- a/drivers/input/touchscreen/elants_i2c.c
+++ b/drivers/input/touchscreen/elants_i2c.c
@@ -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;
}