Re: Linux kernel 2.6.20, PCI and hpt266

["Marco Braga" <marco.braga@gmail.com>]

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2007/3/5, Sergei Shtylyov <sshtylyov@ru.mvista.com>:

> Hello, I am trying to run kernel 2.6.20 on an Au1500 based board. Versions
> > 2.4.x of the kernel are correctly working.
>
>     How could they work I wonder? :-O


Eheheh :-)


> > Problem: on the board there is a HighPoint 371N ATA controller. At the
>
>     There's *no* proper support for HPT371N in 2.4.x.


We've modified them to work. We fixed the "first channel disabled" problem
and the "set pll with a wrong algorithm", etc. :-)


> Details:
> > The driver I use is "drivers/ide/pci/hpt266.c". I've already fixed the
>
>     I guess you mean hpt366.c. :-)


Whoops. Right. I'm using hpt366.c. I'd also like to try the nel libata
drivers.


> > timing problems and PLL configuration that afflict this controller, and
> > removed RESOURCE_64BIT to fix problems with the PCI bus on mips and
> > resource_size_t casts.
>
>     Erm, does it indeed fix the problem I wonder?


Well, at least this change removed the "skipping PCI config due to resource
conflict" error.


>     The PCI config. space accesses use completely different meachanism
> form
> I/O and memory accesses.


I suspected this, but sadly I am novice to PCI. Thank you very much, Sergei.

Today I've done another test: dumping I/O ATA registers, and the results are
puzzling:

The format is:

[hw->io_ports index] [I/O port addr] [I/O port value]

[17179571.588000] 0 addr: 0x1408  val: 0x08
[17179571.596000] 1 addr: 0x1409  val: 0x09
[17179571.608000] 2 addr: 0x140a  val: 0x0a
[17179571.620000] 3 addr: 0x140b  val: 0x0b
[17179571.632000] 4 addr: 0x140c  val: 0x0c
[17179571.644000] 5 addr: 0x140d  val: 0x0d
[17179571.656000] 6 addr: 0x140e  val: 0xa0
[17179571.668000] 7 addr: 0x140f  val: 0x0f
[17179571.680000] 8 addr: 0x1416  val: 0x0a
[17179571.692000] 9 addr: 0x00  val: 0x48

The values seem wrong to me..

Bye!

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