Messages in this thread | | | Date | Sun, 06 Feb 2005 12:40:59 +0100 | From | Pierre Ossman <> | Subject | Re: Strange device init |
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Adam Belay wrote:
>On Sat, Feb 05, 2005 at 06:10:02PM +0100, Pierre Ossman wrote: > > >>I'm having problem with a card reader on a laptop (Acer Aspire 1501). >>The device doesn't get its resources configured properly. >> >>The reader is connected to the LPC bus so there is no standardised way >>to configure the device. On other laptops the configuration is done via >>ACPI (_STA & co. in the DSDT). On this laptop these functions don't do a >>damn thing. >>In Windows this device gets configured through some other means. It's >>not in the driver (I've disected it to confirm this). But under Linux >>the device is left unconfigured. >> >>So my question is if anyone has any ideas on how this device gets >>configured by Windows and possibly how we can get this to work on Linux. >> >>The reason this is an issue is that one cannot detect all the quirks of >>the hardware so a PNP solution is prefered. In those cases the >>manufacturer has chosen resources that work ok. >> >>For some context: I am the maintainer of the driver for this hardware. I >>have a laptop where the DSDT properly sets up the hardware. The Acer >>belongs to some of my users but they are not familiar with the kernel so >>I'm trying to fix this for them. >> >>Rgds >>Pierre >> >> > >So the device is not listed in the DSDT, or _SRS doesn't work? Does _STA >succeed? Finally have you checked if PnPBIOS detects the device? Any >additional information you could provide would be appreciated. > > > The device is listed in the DSDT but the functions are empty. E.g. _SRS:
Method (_SRS, 1, NotSerialized) { }
_PRS and _CRS at least returns the proper resources that should be used.
PNPBIOS cannot be compiled in. This is a x86_64 machine and PNPBIOS is dependent on ISA. Are there any user-space tools that can do the same thing? Just to do some testing.
Rgds Pierre
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