去厂家的FAQ上看了看,有个信息:
Q: Does ESS modem devices support Linux OS?
A: The DSP codes to handle modem communication on a Win Modem or host-based modem (HSP) is ESS intellectual property and is not available for Linux public code release.
ESS only has limited support for Linux modem driver, mainly because Linux driver needs to be built differently based on its kernel version. For resource reason we can only work with OEM customers to provide Linux support based on requested build version. Please check with your hardware vendor for Linux support policy.