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input: ft5x06_ts: check vendor id before upgrade FT firmware

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Upgrade the firmware only if same vendor id is found both in existing
fw and new fw to be upgraded.

This patch is propagated from 3.18 kernel
'commit dba19fc86781 ("input: ft5x06_ts: check vendor id before
upgrade FT firmware")'

Change-Id: Idfc50da45891a1475ac6b35d80c7d725607cbf81
Signed-off-by: Mao Li <maol@codeaurora.org>
This commit is contained in:
Mao Li 2014-04-08 19:58:04 +08:00 • committed by Gerrit - the friendly Code Review server
parent fa14a65666
commit 405643a77e
1 changed files with 20 additions and 2 deletions
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22
drivers/input/touchscreen/ft5x06_ts.c
View file

@ -65,6 +65,7 @@
#define FT_REG_ID 0xA3
#define FT_REG_PMODE 0xA5
#define FT_REG_FW_VER 0xA6
#define FT_REG_FW_VENDOR_ID 0xA8
#define FT_REG_POINT_RATE 0x88
#define FT_REG_THGROUP 0x80
#define FT_REG_ECC 0xCC
@ -115,6 +116,7 @@
#define FT_FW_FILE_MAJ_VER(x) ((x)->data[(x)->size - 2])
#define FT_FW_FILE_MIN_VER(x) 0
#define FT_FW_FILE_SUB_MIN_VER(x) 0
#define FT_FW_FILE_VENDOR_ID(x) ((x)->data[(x)->size - 1])
#define FT_FW_FILE_MAJ_VER_FT6X36(x) ((x)->data[0x10a])
#define FT_FW_FILE_VENDOR_ID_FT6X36(x) ((x)->data[0x108])
@ -213,6 +215,7 @@ struct ft5x06_ts_data {
u8 *tch_data;
u32 tch_data_len;
u8 fw_ver[3];
u8 fw_vendor_id;
#if defined(CONFIG_FB)
struct notifier_block fb_notif;
#elif defined(CONFIG_HAS_EARLYSUSPEND)
@ -295,6 +298,18 @@ static int ft5x0x_read_reg(struct i2c_client *client, u8 addr, u8 *val)
return ft5x06_i2c_read(client, &addr, 1, val, 1);
}
static void ft5x06_update_fw_vendor_id(struct ft5x06_ts_data *data)
{
struct i2c_client *client = data->client;
u8 reg_addr;
int err;
reg_addr = FT_REG_FW_VENDOR_ID;
err = ft5x06_i2c_read(client, &reg_addr, 1, &data->fw_vendor_id, 1);
if (err < 0)
dev_err(&client->dev, "fw vendor id read failed");
}
static void ft5x06_update_fw_ver(struct ft5x06_ts_data *data)
{
struct i2c_client *client = data->client;
@ -903,7 +918,7 @@ static int ft5x06_fw_upgrade(struct device *dev, bool force)
struct ft5x06_ts_data *data = dev_get_drvdata(dev);
const struct firmware *fw = NULL;
int rc;
u8 fw_file_maj, fw_file_min, fw_file_sub_min;
u8 fw_file_maj, fw_file_min, fw_file_sub_min, fw_file_vendor_id;
bool fw_upgrade = false;
if (data->suspended) {
@ -933,6 +948,7 @@ static int ft5x06_fw_upgrade(struct device *dev, bool force)
}
fw_file_min = FT_FW_FILE_MIN_VER(fw);
fw_file_sub_min = FT_FW_FILE_SUB_MIN_VER(fw);
fw_file_vendor_id = FT_FW_FILE_VENDOR_ID(fw);
dev_info(dev, "Current firmware: %d.%d.%d", data->fw_ver[0],
data->fw_ver[1], data->fw_ver[2]);
@ -941,7 +957,8 @@ static int ft5x06_fw_upgrade(struct device *dev, bool force)
if (force)
fw_upgrade = true;
else if (data->fw_ver[0] < fw_file_maj)
else if ((data->fw_ver[0] < fw_file_maj) &&
data->fw_vendor_id == fw_file_vendor_id)
fw_upgrade = true;
if (!fw_upgrade) {
@ -1661,6 +1678,7 @@ static int ft5x06_ts_probe(struct i2c_client *client,
dev_dbg(&client->dev, "touch threshold = %d\n", reg_value * 4);
ft5x06_update_fw_ver(data);
ft5x06_update_fw_vendor_id(data);
FT_STORE_TS_INFO(data->ts_info, data->family_id, data->pdata->name,
data->pdata->num_max_touches, data->pdata->group_id,