diff options
| -rw-r--r-- | drivers/input/touchscreen/atmel_mxt_ts.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index 9bf32c3..7a9197a 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -1185,6 +1185,30 @@ done: return error ?: count; } +static int mxt_check_firmware_format(struct device *dev, + const struct firmware *fw) +{ + unsigned int pos = 0; + char c; + + while (pos < fw->size) { + c = *(fw->data + pos); + + if (c < '0' || (c > '9' && c < 'A') || c > 'F') + return 0; + + pos++; + } + + /* + * To convert file try: + * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw + */ + dev_err(dev, "Aborting: firmware file must be in binary format\n"); + + return -EINVAL; +} + static int mxt_load_fw(struct device *dev, const char *fn) { struct mxt_data *data = dev_get_drvdata(dev); @@ -1201,6 +1225,11 @@ static int mxt_load_fw(struct device *dev, const char *fn) return ret; } + /* Check for incorrect enc file */ + ret = mxt_check_firmware_format(dev, fw); + if (ret) + goto release_firmware; + ret = mxt_lookup_bootloader_address(data); if (ret) goto release_firmware; |