Andrea Arcangeli (email@example.com)
Tue, 9 Jun 1998 18:48:38 +0200 (CEST)
On Tue, 9 Jun 1998, Tim Waugh wrote:
>I spoke to David about the "most sane" thing to write to ECR, given that
>there might not be one there at all, and 0xc seemed the best choice.
>However, as we're writing 0xc to CTR immediately afterwards it doesn't
>matter if ECR aliases to CTR, so yes, possibly zero is better.
As Philip pointed out instead it matter, infact it could cause the printer
to reset if the ECR aliases to CTR. So it' s better to use 0xc in the SPP
detection stage. Then parport_pc will reinitialize the ECR if present to
0x0 and doing that will avoid problems with ECP DMA.
So my patch should be right replacing 0x0 to 0xc.
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