Re: [PATCH] serial: DCC(JTAG) serial and console emulation support

Daniel Walker
2010-10-07T19:39:52Z

On Thu, 2010-10-07 at 15:25 -0400, Mike Frysinger wrote:
> On Thu, Oct 7, 2010 at 14:36, Daniel Walker wrote:
> > Many of JTAG debuggers for ARM support DCC protocol over JTAG
> > connection, which is very useful to debug hardwares which has no
> > serial port. This patch adds DCC serial emulation and the console
> > support. System timer based polling method is used for the
> > emulation of serial input interrupt handling.
>
> why use serial_core at all ? seems like you could just use the tty
> layer directly. i did that with drivers/char/bfin_jtag_comm.c.
>
> although, there's the suggestion in the air that my jtag driver could
> be converted to the HVC framework to even further simplify things.
> but no one thinks it should be serial_core :).
> -mike

It will actually create a serial port on ttyS* if you want it to.. It
could be debatable if that's useful, but I didn't rip that out because
Hyok had that in his original code (he thought it was useful) ..

Daniel

--

Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.