Re: Plug and play for a tty line disciple networking device

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi Greg,

>>>> How can you achieve plug and play for a ft2232 based USB serial device
>>>> implementing 802.15.4 networking?
>>>> 
>>>> The device has a 802.15.4 SOC with a UART attached to a ft2232. With
>>>> firmware loaded the only thing it can do is talk the 802.15.4 tty line
>>>> discipline, it is not a general purpose serial port.
>>>> 
>>>> Right now the device works by plugging it in and it appears as a
>>>> generic USB serial device like ttyUSB0. You then run a user space app
>>>> which sets the line discipline, holds the port open and attaches it to
>>>> the 6lowpan implementation in the networking code. But doing that is
>>>> inconvenient and users needs to be trained to do it. Much simpler if
>>>> we could just plug the device in and it worked.
>>>> 
>>>> We can add a EEPROM to the ft2232 to give it a unique USB ID.  Is it
>>>> possible to make a kernel driver that see this ID, sets the line
>>>> discipline and wires the serial port directly into the networking
>>>> code?
>>> 
>>> Yes, you can do that.
>> 
>> Is there an existing driver in the kernel that does this?
>> So far all of the ones I've checked still need a user space app.
> 
> Look at the bluetooth drivers, they have their own line dicipline I
> think.

yes we do. And we also have a userspace tool (hciattach) to setup the line discipline. However the automatic setup can be easily automated with a simple udev rule.

Regards

Marcel

--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Media]     [Linux Input]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Old Linux USB Devel Archive]

  Powered by Linux