On Wed, 2010-10-13 at 17:21 +0200, Arnd Bergmann wrote: > On Tuesday 05 October 2010, 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. > > > > Most of the code was taken from Hyok S. Choi original work, but the > > inline assmebly needed some work and updating. It now supports ARMv7. > > Also the description above is from Hyok also. > > > > Sorry to join in late, but why would you want to make this a "serial" > driver when it really is just a dumb tty. The code has been around since 2003 I think, and Hyok wrote (not me).. So I'm not sure why it's a serial driver. The only thing which I noted in a prior email is that it uses takes over ttyS optionally, so that might be part of the reason. > I think you would be much better off making it a "hvc" driver, where > you just need to provide a read character and write character function > and an optional interrupt handler but otherwise have the common hvc > code take care of polling the hardware and talking to the tty layer. I don't know what the "hvc" driver is "Hypervisor Virtual Console" maybe? Can you give any sort of example driver which does what you suggesting? Daniel -- Sent by a consultant of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum. -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
