Good evening, We are developing a custom piece of hardware that provides the equivalent of two serial console interfaces. They do not speak the AT command set. One port provides an interactive console to the user for configuration purposes (via minicom/etc). The other speaks a proprietary protocol used by purpose-built userspace tools. Neither port has an inherent baud rate limit; both can fully utilize USB2 bandwidth.
The closest standard USB-IF class I could find is the cdc-acm device class. However, this seems to be very much targeted at modems with ATx commands. The linux cdc-acm drivers would put the hardware at /dev/ttyACM and software seems to treat these like modems. The closer matching usb-serial dongles all appear to have unstandardized drivers. We would like our hardware to work "out of the box" on released Linux versions (and to a lesser extent on windows). Our current prototypes borrow the Sierra VID to trick the kernel into loading the sierra driver. This works well for the interactive console. However, I assume that distributing the device like this will have legal consequences. I could write a custom driver, but then end users need to compile +install it. Our device will never be widely available and thus our driver will never be included in linux, ie: even future users will have to compile+install for themselves. Because the USB logic is inside an FPGA, I can readily change the hardware to suite any existing driver. What driver should I target? Is there a way to AUTOload an older driver despite the new VID:PID? Should I give up and require a custom driver? Thank you for any and all feedback/advice. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
