On Friday 02 May 2003 08:38 pm, Blaise Gassend wrote:
> There is some DMA code in parport_pc.c. For writing to the port it works
> well. For reading from the port there is some code that I hacked up that
> is circulating with the CPiA webcam drivers, but it only works for those
> webcams. For the webcam it produces a HUGE improvement in performance.
> What exactly are you trying to do?
Writing bytes to a custom piece of hardware. Speed is #1 priority and dma was
brought up as a factor in speed.
It's a bit if a screwy situation, since the code is in user-space, and I'd
think a kernel driver would be much faster.
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