Messages in this thread | | | Date | Wed, 12 May 1999 13:04:58 +0200 | From | Pavel Machek <> | Subject | Re: High speed serial ports |
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Hi!
> 3) Is the probing instructions timing sensitive? i.e., can we do all > of this in a user-mode program, and if it succeeds in enabling the > high-speed port, just simply use the standard ioctl to set the > baud_base, and thus not requiring any serial driver changes at all. > This has the advantage of not loading down kernel memory with one-time > initialization code. It also means that all of these tables can be > more easily updated, and kept separate from the kernel, which would be a > good thing. It also satisfies a concern I have about what to do when > the next motherboard/chipset manufacture comes along, needing to do the > same thing but in a subtlely incompatible manner.... basically, this is > a scaling issue.
You mean putting this kind of detection into setserial instead of kernel? Well, that might work... We'll still need to create new serial-chip type "hispeed" (because bank selection has to be done in other way or chip failsback into compatibility mode). I just thought that doing detection automatically on boot is nicer...
Pavel -- The best software in life is free (not shareware)! Pavel GCM d? s-: !g p?:+ au- a--@ w+ v- C++@ UL+++ L++ N++ E++ W--- M- Y- R+
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